CodeMirror: Linter Demo

Linter Demo

Errors: 42

Warnings: 544

File: /home/fstrocco/Dart/dart/benchmark/analyzer/lib/src/generated/engine.dart

// Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file // for details. All rights reserved. Use of this source code is governed by a // BSD-style license that can be found in the LICENSE file. // This code was auto-generated, is not intended to be edited, and is subject to // significant change. Please see the README file for more information. library engine; import "dart:math" as math; import 'dart:async'; import 'dart:collection'; import 'package:analyzer/src/cancelable_future.dart'; import 'package:analyzer/src/generated/incremental_resolution_validator.dart'; import 'package:analyzer/src/plugin/engine_plugin.dart'; import 'package:analyzer/src/services/lint.dart'; import 'package:analyzer/src/task/task_dart.dart'; import '../../instrumentation/instrumentation.dart'; import 'ast.dart'; import 'constant.dart'; import 'element.dart'; import 'error.dart'; import 'error_verifier.dart'; import 'html.dart' as ht; import 'incremental_resolver.dart' show IncrementalResolver, PoorMansIncrementalResolver; import 'incremental_scanner.dart'; import 'java_core.dart'; import 'java_engine.dart'; import 'parser.dart' show Parser, IncrementalParser; import 'resolver.dart'; import 'scanner.dart'; import 'sdk.dart' show DartSdk; import 'source.dart'; import 'utilities_collection.dart'; import 'utilities_general.dart'; /** * Used by [AnalysisOptions] to allow function bodies to be analyzed in some * sources but not others. */ typedef bool AnalyzeFunctionBodiesPredicate(Source source); /** * Type of callback functions used by PendingFuture. Functions of this type * should perform a computation based on the data in [sourceEntry] and return * it. If the computation can't be performed yet because more analysis is * needed, null should be returned. * * The function may also throw an exception, in which case the corresponding * future will be completed with failure. * * Since this function is called while the state of analysis is being updated, * it should be free of side effects so that it doesn't cause reentrant * changes to the analysis state. */ typedef T PendingFutureComputer<T>(SourceEntry sourceEntry); /** * An LRU cache of information related to analysis. */ class AnalysisCache { /** * A flag used to control whether trace information should be produced when * the content of the cache is modified. */ static bool _TRACE_CHANGES = false; /** * A list containing the partitions of which this cache is comprised. */ final List<CachePartition> _partitions; /** * Initialize a newly created cache to have the given [_partitions]. The * partitions will be searched in the order in which they appear in the list, * so the most specific partition (usually an [SdkCachePartition]) should be * first and the most general (usually a [UniversalCachePartition]) last. */ AnalysisCache(this._partitions); /** * Return the number of entries in this cache that have an AST associated with * them. */ int get astSize => _partitions[_partitions.length - 1].astSize; /** * Return information about each of the partitions in this cache. */ List<AnalysisContextStatistics_PartitionData> get partitionData { int count = _partitions.length; List<AnalysisContextStatistics_PartitionData> data = new List<AnalysisContextStatistics_PartitionData>(count); for (int i = 0; i < count; i++) { CachePartition partition = _partitions[i]; data[i] = new AnalysisContextStatisticsImpl_PartitionDataImpl( partition.astSize, partition.map.length); } return data; } /** * Record that the AST associated with the given [source] was just read from * the cache. */ void accessedAst(Source source) { int count = _partitions.length; for (int i = 0; i < count; i++) { if (_partitions[i].contains(source)) { _partitions[i].accessedAst(source); return; } } } /** * Return the entry associated with the given [source]. */ SourceEntry get(Source source) { int count = _partitions.length; for (int i = 0; i < count; i++) { if (_partitions[i].contains(source)) { return _partitions[i].get(source); } } // // We should never get to this point because the last partition should // always be a universal partition, except in the case of the SDK context, // in which case the source should always be part of the SDK. // return null; } /** * Return context that owns the given [source]. */ InternalAnalysisContext getContextFor(Source source) { int count = _partitions.length; for (int i = 0; i < count; i++) { if (_partitions[i].contains(source)) { return _partitions[i].context; } } // // We should never get to this point because the last partition should // always be a universal partition, except in the case of the SDK context, // in which case the source should always be part of the SDK. // AnalysisEngine.instance.logger.logInformation( "Could not find context for ${source.fullName}", new CaughtException(new AnalysisException(), null)); return null; } /** * Return an iterator returning all of the map entries mapping sources to * cache entries. */ MapIterator<Source, SourceEntry> iterator() { int count = _partitions.length; List<Map<Source, SourceEntry>> maps = new List<Map>(count); for (int i = 0; i < count; i++) { maps[i] = _partitions[i].map; } return new MultipleMapIterator<Source, SourceEntry>(maps); } /** * Associate the given [entry] with the given [source]. */ void put(Source source, SourceEntry entry) { entry.fixExceptionState(); int count = _partitions.length; for (int i = 0; i < count; i++) { if (_partitions[i].contains(source)) { if (_TRACE_CHANGES) { try { SourceEntry oldEntry = _partitions[i].get(source); if (oldEntry == null) { AnalysisEngine.instance.logger.logInformation( "Added a cache entry for '${source.fullName}'."); } else { AnalysisEngine.instance.logger.logInformation( "Modified the cache entry for ${source.fullName}'. Diff = ${entry.getDiff(oldEntry)}"); } } catch (exception) { // Ignored JavaSystem.currentTimeMillis(); } } _partitions[i].put(source, entry); return; } } } /** * Remove all information related to the given [source] from this cache. */ void remove(Source source) { int count = _partitions.length; for (int i = 0; i < count; i++) { if (_partitions[i].contains(source)) { if (_TRACE_CHANGES) { try { AnalysisEngine.instance.logger.logInformation( "Removed the cache entry for ${source.fullName}'."); } catch (exception) { // Ignored JavaSystem.currentTimeMillis(); } } _partitions[i].remove(source); return; } } } /** * Record that the AST associated with the given [source] was just removed * from the cache. */ void removedAst(Source source) { int count = _partitions.length; for (int i = 0; i < count; i++) { if (_partitions[i].contains(source)) { _partitions[i].removedAst(source); return; } } } /** * Return the number of sources that are mapped to cache entries. */ int size() { int size = 0; int count = _partitions.length; for (int i = 0; i < count; i++) { size += _partitions[i].size(); } return size; } /** * Record that the AST associated with the given [source] was just stored to * the cache. */ void storedAst(Source source) { int count = _partitions.length; for (int i = 0; i < count; i++) { if (_partitions[i].contains(source)) { _partitions[i].storedAst(source); return; } } } } /** * A context in which a single analysis can be performed and incrementally * maintained. The context includes such information as the version of the SDK * being analyzed against as well as the package-root used to resolve 'package:' * URI's. (Both of which are known indirectly through the [SourceFactory].) * * An analysis context also represents the state of the analysis, which includes * knowing which sources have been included in the analysis (either directly or * indirectly) and the results of the analysis. Sources must be added and * removed from the context using the method [applyChanges], which is also used * to notify the context when sources have been modified and, consequently, * previously known results might have been invalidated. * * There are two ways to access the results of the analysis. The most common is * to use one of the 'get' methods to access the results. The 'get' methods have * the advantage that they will always return quickly, but have the disadvantage * that if the results are not currently available they will return either * nothing or in some cases an incomplete result. The second way to access * results is by using one of the 'compute' methods. The 'compute' methods will * always attempt to compute the requested results but might block the caller * for a significant period of time. * * When results have been invalidated, have never been computed (as is the case * for newly added sources), or have been removed from the cache, they are * not automatically recreated. They will only be recreated if one of the * 'compute' methods is invoked. * * However, this is not always acceptable. Some clients need to keep the * analysis results up-to-date. For such clients there is a mechanism that * allows them to incrementally perform needed analysis and get notified of the * consequent changes to the analysis results. This mechanism is realized by the * method [performAnalysisTask]. * * Analysis engine allows for having more than one context. This can be used, * for example, to perform one analysis based on the state of files on disk and * a separate analysis based on the state of those files in open editors. It can * also be used to perform an analysis based on a proposed future state, such as * the state after a refactoring. */ abstract class AnalysisContext { /** * An empty list of contexts. */ static const List<AnalysisContext> EMPTY_LIST = const <AnalysisContext>[]; /** * Return the set of analysis options controlling the behavior of this * context. Clients should not modify the returned set of options. The options * should only be set by invoking the method [setAnalysisOptions]. */ AnalysisOptions get analysisOptions; /** * Set the set of analysis options controlling the behavior of this context to * the given [options]. Clients can safely assume that all necessary analysis * results have been invalidated. */ void set analysisOptions(AnalysisOptions options); /** * Set the order in which sources will be analyzed by [performAnalysisTask] to * match the order of the sources in the given list of [sources]. If a source * that needs to be analyzed is not contained in the list, then it will be * treated as if it were at the end of the list. If the list is empty (or * `null`) then no sources will be given priority over other sources. * * Changes made to the list after this method returns will not be * reflected in the priority order. */ void set analysisPriorityOrder(List<Source> sources); /** * Return the set of declared variables used when computing constant values. */ DeclaredVariables get declaredVariables; /** * Return a list containing all of the sources known to this context that * represent HTML files. The contents of the list can be incomplete. */ List<Source> get htmlSources; /** * Returns `true` if this context was disposed using [dispose]. */ bool get isDisposed; /** * Return a list containing all of the sources known to this context that * represent the defining compilation unit of a library that can be run within * a browser. The sources that are returned represent libraries that have a * 'main' method and are either referenced by an HTML file or import, directly * or indirectly, a client-only library. The contents of the list can be * incomplete. */ List<Source> get launchableClientLibrarySources; /** * Return a list containing all of the sources known to this context that * represent the defining compilation unit of a library that can be run * outside of a browser. The contents of the list can be incomplete. */ List<Source> get launchableServerLibrarySources; /** * Return a list containing all of the sources known to this context that * represent the defining compilation unit of a library. The contents of the * list can be incomplete. */ List<Source> get librarySources; /** * Return a client-provided name used to identify this context, or `null` if * the client has not provided a name. */ String get name; /** * Set the client-provided name used to identify this context to the given * [name]. */ set name(String name); /** * The stream that is notified when sources have been added or removed, * or the source's content has changed. */ Stream<SourcesChangedEvent> get onSourcesChanged; /** * Return a list containing all of the sources known to this context whose * state is neither valid or flushed. These sources are not safe to update * during refactoring, because we might not know all the references in them. */ List<Source> get refactoringUnsafeSources; /** * Return the source factory used to create the sources that can be analyzed * in this context. */ SourceFactory get sourceFactory; /** * Set the source factory used to create the sources that can be analyzed in * this context to the given source [factory]. Clients can safely assume that * all analysis results have been invalidated. */ void set sourceFactory(SourceFactory factory); /** * Return a list containing all of the sources known to this context. */ List<Source> get sources; /** * Return a type provider for this context or throw [AnalysisException] if * either `dart:core` or `dart:async` cannot be resolved. */ TypeProvider get typeProvider; /** * Add the given [listener] to the list of objects that are to be notified * when various analysis results are produced in this context. */ void addListener(AnalysisListener listener); /** * Apply the given [delta] to change the level of analysis that will be * performed for the sources known to this context. */ void applyAnalysisDelta(AnalysisDelta delta); /** * Apply the changes specified by the given [changeSet] to this context. Any * analysis results that have been invalidated by these changes will be * removed. */ void applyChanges(ChangeSet changeSet); /** * Return the documentation comment for the given [element] as it appears in * the original source (complete with the beginning and ending delimiters) for * block documentation comments, or lines starting with `"///"` and separated * with `"\n"` characters for end-of-line documentation comments, or `null` if * the element does not have a documentation comment associated with it. This * can be a long-running operation if the information needed to access the * comment is not cached. * * Throws an [AnalysisException] if the documentation comment could not be * determined because the analysis could not be performed. * * Note: This method cannot be used in an async environment. */ String computeDocumentationComment(Element element); /** * Return a list containing all of the errors associated with the given * [source]. If the errors are not already known then the source will be * analyzed in order to determine the errors associated with it. * * Throws an [AnalysisException] if the errors could not be determined because * the analysis could not be performed. * * Note: This method cannot be used in an async environment. * * See [getErrors]. */ List<AnalysisError> computeErrors(Source source); /** * Return the element model corresponding to the HTML file defined by the * given [source]. If the element model does not yet exist it will be created. * The process of creating an element model for an HTML file can be * long-running, depending on the size of the file and the number of libraries * that are defined in it (via script tags) that also need to have a model * built for them. * * Throws AnalysisException if the element model could not be determined * because the analysis could not be performed. * * Note: This method cannot be used in an async environment. * * See [getHtmlElement]. */ HtmlElement computeHtmlElement(Source source); /** * Return the kind of the given [source], computing it's kind if it is not * already known. Return [SourceKind.UNKNOWN] if the source is not contained * in this context. * * Note: This method cannot be used in an async environment. * * See [getKindOf]. */ SourceKind computeKindOf(Source source); /** * Return the element model corresponding to the library defined by the given * [source]. If the element model does not yet exist it will be created. The * process of creating an element model for a library can long-running, * depending on the size of the library and the number of libraries that are * imported into it that also need to have a model built for them. * * Throws an [AnalysisException] if the element model could not be determined * because the analysis could not be performed. * * Note: This method cannot be used in an async environment. * * See [getLibraryElement]. */ LibraryElement computeLibraryElement(Source source); /** * Return the line information for the given [source], or `null` if the source * is not of a recognized kind (neither a Dart nor HTML file). If the line * information was not previously known it will be created. The line * information is used to map offsets from the beginning of the source to line * and column pairs. * * Throws an [AnalysisException] if the line information could not be * determined because the analysis could not be performed. * * Note: This method cannot be used in an async environment. * * See [getLineInfo]. */ LineInfo computeLineInfo(Source source); /** * Return a future which will be completed with the fully resolved AST for a * single compilation unit within the given library, once that AST is up to * date. * * If the resolved AST can't be computed for some reason, the future will be * completed with an error. One possible error is AnalysisNotScheduledError, * which means that the resolved AST can't be computed because the given * source file is not scheduled to be analyzed within the context of the * given library. */ CancelableFuture<CompilationUnit> computeResolvedCompilationUnitAsync( Source source, Source librarySource); /** * Notifies the context that the client is going to stop using this context. */ void dispose(); /** * Return `true` if the given [source] exists. * * This method should be used rather than the method [Source.exists] because * contexts can have local overrides of the content of a source that the * source is not aware of and a source with local content is considered to * exist even if there is no file on disk. */ bool exists(Source source); /** * Return the element model corresponding to the compilation unit defined by * the given [unitSource] in the library defined by the given [librarySource], * or `null` if the element model does not currently exist or if the library * cannot be analyzed for some reason. */ CompilationUnitElement getCompilationUnitElement( Source unitSource, Source librarySource); /** * Return the contents and timestamp of the given [source]. * * This method should be used rather than the method [Source.getContents] * because contexts can have local overrides of the content of a source that * the source is not aware of. */ TimestampedData<String> getContents(Source source); /** * Return the element referenced by the given [location], or `null` if the * element is not immediately available or if there is no element with the * given location. The latter condition can occur, for example, if the * location describes an element from a different context or if the element * has been removed from this context as a result of some change since it was * originally obtained. */ Element getElement(ElementLocation location); /** * Return an analysis error info containing the list of all of the errors and * the line info associated with the given [source]. The list of errors will * be empty if the source is not known to this context or if there are no * errors in the source. The errors contained in the list can be incomplete. * * See [computeErrors]. */ AnalysisErrorInfo getErrors(Source source); /** * Return the element model corresponding to the HTML file defined by the * given [source], or `null` if the source does not represent an HTML file, * the element representing the file has not yet been created, or the analysis * of the HTML file failed for some reason. * * See [computeHtmlElement]. */ HtmlElement getHtmlElement(Source source); /** * Return the sources for the HTML files that reference the compilation unit * with the given [source]. If the source does not represent a Dart source or * is not known to this context, the returned list will be empty. The contents * of the list can be incomplete. */ List<Source> getHtmlFilesReferencing(Source source); /** * Return the kind of the given [source], or `null` if the kind is not known * to this context. * * See [computeKindOf]. */ SourceKind getKindOf(Source source); /** * Return the sources for the defining compilation units of any libraries of * which the given [source] is a part. The list will normally contain a single * library because most Dart sources are only included in a single library, * but it is possible to have a part that is contained in multiple identically * named libraries. If the source represents the defining compilation unit of * a library, then the returned list will contain the given source as its only * element. If the source does not represent a Dart source or is not known to * this context, the returned list will be empty. The contents of the list can * be incomplete. */ List<Source> getLibrariesContaining(Source source); /** * Return the sources for the defining compilation units of any libraries that * depend on the library defined by the given [librarySource]. One library * depends on another if it either imports or exports that library. */ List<Source> getLibrariesDependingOn(Source librarySource); /** * Return the sources for the defining compilation units of any libraries that * are referenced from the HTML file defined by the given [htmlSource]. */ List<Source> getLibrariesReferencedFromHtml(Source htmlSource); /** * Return the element model corresponding to the library defined by the given * [source], or `null` if the element model does not currently exist or if the * library cannot be analyzed for some reason. */ LibraryElement getLibraryElement(Source source); /** * Return the line information for the given [source], or `null` if the line * information is not known. The line information is used to map offsets from * the beginning of the source to line and column pairs. * * See [computeLineInfo]. */ LineInfo getLineInfo(Source source); /** * Return the modification stamp for the [source], or a negative value if the * source does not exist. A modification stamp is a non-negative integer with * the property that if the contents of the source have not been modified * since the last time the modification stamp was accessed then the same value * will be returned, but if the contents of the source have been modified one * or more times (even if the net change is zero) the stamps will be different. * * This method should be used rather than the method * [Source.getModificationStamp] because contexts can have local overrides of * the content of a source that the source is not aware of. */ int getModificationStamp(Source source); /** * Return a fully resolved AST for the compilation unit defined by the given * [unitSource] within the given [library], or `null` if the resolved AST is * not already computed. * * See [resolveCompilationUnit]. */ CompilationUnit getResolvedCompilationUnit( Source unitSource, LibraryElement library); /** * Return a fully resolved AST for the compilation unit defined by the given * [unitSource] within the library defined by the given [librarySource], or * `null` if the resolved AST is not already computed. * * See [resolveCompilationUnit2]. */ CompilationUnit getResolvedCompilationUnit2( Source unitSource, Source librarySource); /** * Return the fully resolved HTML unit defined by the given [htmlSource], or * `null` if the resolved unit is not already computed. * * See [resolveHtmlUnit]. */ ht.HtmlUnit getResolvedHtmlUnit(Source htmlSource); /** * Return a list of the sources being analyzed in this context whose full path * is equal to the given [path]. */ List<Source> getSourcesWithFullName(String path); /** * Return `true` if the given [librarySource] is known to be the defining * compilation unit of a library that can be run on a client (references * 'dart:html', either directly or indirectly). * * Note: In addition to the expected case of returning `false` if the * source is known to be a library that cannot be run on a client, this method * will also return `false` if the source is not known to be a library or if * we do not know whether it can be run on a client. */ bool isClientLibrary(Source librarySource); /** * Return `true` if the given [librarySource] is known to be the defining * compilation unit of a library that can be run on the server (does not * reference 'dart:html', either directly or indirectly). * * Note: In addition to the expected case of returning `false` if the * source is known to be a library that cannot be run on the server, this * method will also return `false` if the source is not known to be a library * or if we do not know whether it can be run on the server. */ bool isServerLibrary(Source librarySource); /** * Parse the content of the given [source] to produce an AST structure. The * resulting AST structure may or may not be resolved, and may have a slightly * different structure depending upon whether it is resolved. * * Throws an [AnalysisException] if the analysis could not be performed * * Note: This method cannot be used in an async environment. */ CompilationUnit parseCompilationUnit(Source source); /** * Parse a single HTML [source] to produce an AST structure. The resulting * HTML AST structure may or may not be resolved, and may have a slightly * different structure depending upon whether it is resolved. * * Throws an [AnalysisException] if the analysis could not be performed * * Note: This method cannot be used in an async environment. */ ht.HtmlUnit parseHtmlUnit(Source source); /** * Perform the next unit of work required to keep the analysis results * up-to-date and return information about the consequent changes to the * analysis results. This method can be long running. */ AnalysisResult performAnalysisTask(); /** * Remove the given [listener] from the list of objects that are to be * notified when various analysis results are produced in this context. */ void removeListener(AnalysisListener listener); /** * Return a fully resolved AST for the compilation unit defined by the given * [unitSource] within the given [library]. * * Throws an [AnalysisException] if the analysis could not be performed. * * Note: This method cannot be used in an async environment. * * See [getResolvedCompilationUnit]. */ CompilationUnit resolveCompilationUnit( Source unitSource, LibraryElement library); /** * Return a fully resolved AST for the compilation unit defined by the given * [unitSource] within the library defined by the given [librarySource]. * * Throws an [AnalysisException] if the analysis could not be performed. * * Note: This method cannot be used in an async environment. * * See [getResolvedCompilationUnit2]. */ CompilationUnit resolveCompilationUnit2( Source unitSource, Source librarySource); /** * Parse and resolve a single [htmlSource] within the given context to produce * a fully resolved AST. * * Throws an [AnalysisException] if the analysis could not be performed. * * Note: This method cannot be used in an async environment. */ ht.HtmlUnit resolveHtmlUnit(Source htmlSource); /** * Set the contents of the given [source] to the given [contents] and mark the * source as having changed. The additional [offset] and [length] information * is used by the context to determine what reanalysis is necessary. */ void setChangedContents( Source source, String contents, int offset, int oldLength, int newLength); /** * Set the contents of the given [source] to the given [contents] and mark the * source as having changed. This has the effect of overriding the default * contents of the source. If the contents are `null` the override is removed * so that the default contents will be returned. */ void setContents(Source source, String contents); } /** * An [AnalysisContext]. */ class AnalysisContextImpl implements InternalAnalysisContext { /** * The difference between the maximum cache size and the maximum priority * order size. The priority list must be capped so that it is less than the * cache size. Failure to do so can result in an infinite loop in * performAnalysisTask() because re-caching one AST structure can cause * another priority source's AST structure to be flushed. */ static int _PRIORITY_ORDER_SIZE_DELTA = 4; /** * A flag indicating whether trace output should be produced as analysis tasks * are performed. Used for debugging. */ static bool _TRACE_PERFORM_TASK = false; /** * The next context identifier. */ static int _NEXT_ID = 0; /** * The unique identifier of this context. */ final int _id = _NEXT_ID++; /** * A client-provided name used to identify this context, or `null` if the * client has not provided a name. */ String name; /** * The set of analysis options controlling the behavior of this context. */ AnalysisOptionsImpl _options = new AnalysisOptionsImpl(); /** * A flag indicating whether errors related to implicitly analyzed sources * should be generated and reported. */ bool _generateImplicitErrors = true; /** * A flag indicating whether errors related to sources in the SDK should be * generated and reported. */ bool _generateSdkErrors = true; /** * A flag indicating whether this context is disposed. */ bool _disposed = false; /** * A cache of content used to override the default content of a source. */ ContentCache _contentCache = new ContentCache(); /** * The source factory used to create the sources that can be analyzed in this * context. */ SourceFactory _sourceFactory; /** * The set of declared variables used when computing constant values. */ DeclaredVariables _declaredVariables = new DeclaredVariables(); /** * A source representing the core library. */ Source _coreLibrarySource; /** * A source representing the async library. */ Source _asyncLibrarySource; /** * The partition that contains analysis results that are not shared with other * contexts. */ CachePartition _privatePartition; /** * A table mapping the sources known to the context to the information known * about the source. */ AnalysisCache _cache; /** * A list containing sources for which data should not be flushed. */ List<Source> _priorityOrder = Source.EMPTY_ARRAY; /** * A map from all sources for which there are futures pending to a list of * the corresponding PendingFuture objects. These sources will be analyzed * in the same way as priority sources, except with higher priority. * * TODO(paulberry): since the size of this map is not constrained (as it is * for _priorityOrder), we run the risk of creating an analysis loop if * re-caching one AST structure causes the AST structure for another source * with pending futures to be flushed. However, this is unlikely to happen * in practice since sources are removed from this hash set as soon as their * futures have completed. */ HashMap<Source, List<PendingFuture>> _pendingFutureSources = new HashMap<Source, List<PendingFuture>>(); /** * A list containing sources whose AST structure is needed in order to resolve * the next library to be resolved. */ HashSet<Source> _neededForResolution = null; /** * A table mapping sources to the change notices that are waiting to be * returned related to that source. */ HashMap<Source, ChangeNoticeImpl> _pendingNotices = new HashMap<Source, ChangeNoticeImpl>(); /** * The object used to record the results of performing an analysis task. */ AnalysisContextImpl_AnalysisTaskResultRecorder _resultRecorder; /** * Cached information used in incremental analysis or `null` if none. */ IncrementalAnalysisCache _incrementalAnalysisCache; /** * The [TypeProvider] for this context, `null` if not yet created. */ TypeProvider _typeProvider; /** * The object used to manage the list of sources that need to be analyzed. */ WorkManager _workManager = new WorkManager(); /** * The [Stopwatch] of the current "perform tasks cycle". */ Stopwatch _performAnalysisTaskStopwatch; /** * The controller for sending [SourcesChangedEvent]s. */ StreamController<SourcesChangedEvent> _onSourcesChangedController; /** * The listeners that are to be notified when various analysis results are * produced in this context. */ List<AnalysisListener> _listeners = new List<AnalysisListener>(); /** * The most recently incrementally resolved source, or `null` when it was * already validated, or the most recent change was not incrementally resolved. */ Source incrementalResolutionValidation_lastUnitSource; /** * The most recently incrementally resolved library source, or `null` when it * was already validated, or the most recent change was not incrementally * resolved. */ Source incrementalResolutionValidation_lastLibrarySource; /** * The result of incremental resolution result of * [incrementalResolutionValidation_lastSource]. */ CompilationUnit incrementalResolutionValidation_lastUnit; /** * A factory to override how the [ResolverVisitor] is created. */ ResolverVisitorFactory resolverVisitorFactory; /** * A factory to override how the [TypeResolverVisitor] is created. */ TypeResolverVisitorFactory typeResolverVisitorFactory; /** * A factory to override how [LibraryResolver] is created. */ LibraryResolverFactory libraryResolverFactory; /** * Initialize a newly created analysis context. */ AnalysisContextImpl() { _resultRecorder = new AnalysisContextImpl_AnalysisTaskResultRecorder(this); _privatePartition = new UniversalCachePartition(this, AnalysisOptionsImpl.DEFAULT_CACHE_SIZE, new AnalysisContextImpl_ContextRetentionPolicy(this)); _cache = createCacheFromSourceFactory(null); _onSourcesChangedController = new StreamController<SourcesChangedEvent>.broadcast(); } @override AnalysisOptions get analysisOptions => _options; @override void set analysisOptions(AnalysisOptions options) { bool needsRecompute = this._options.analyzeFunctionBodiesPredicate != options.analyzeFunctionBodiesPredicate || this._options.generateImplicitErrors != options.generateImplicitErrors || this._options.generateSdkErrors != options.generateSdkErrors || this._options.dart2jsHint != options.dart2jsHint || (this._options.hint && !options.hint) || this._options.preserveComments != options.preserveComments || this._options.enableNullAwareOperators != options.enableNullAwareOperators || this._options.enableStrictCallChecks != options.enableStrictCallChecks; int cacheSize = options.cacheSize; if (this._options.cacheSize != cacheSize) { this._options.cacheSize = cacheSize; //cache.setMaxCacheSize(cacheSize); _privatePartition.maxCacheSize = cacheSize; // // Cap the size of the priority list to being less than the cache size. // Failure to do so can result in an infinite loop in // performAnalysisTask() because re-caching one AST structure // can cause another priority source's AST structure to be flushed. // // TODO(brianwilkerson) Remove this constraint when the new task model is // implemented. // int maxPriorityOrderSize = cacheSize - _PRIORITY_ORDER_SIZE_DELTA; if (_priorityOrder.length > maxPriorityOrderSize) { _priorityOrder = _priorityOrder.sublist(0, maxPriorityOrderSize); } } this._options.analyzeFunctionBodiesPredicate = options.analyzeFunctionBodiesPredicate; this._options.generateImplicitErrors = options.generateImplicitErrors; this._options.generateSdkErrors = options.generateSdkErrors; this._options.dart2jsHint = options.dart2jsHint; this._options.enableNullAwareOperators = options.enableNullAwareOperators; this._options.enableStrictCallChecks = options.enableStrictCallChecks; this._options.hint = options.hint; this._options.incremental = options.incremental; this._options.incrementalApi = options.incrementalApi; this._options.incrementalValidation = options.incrementalValidation; this._options.lint = options.lint; this._options.preserveComments = options.preserveComments; _generateImplicitErrors = options.generateImplicitErrors; _generateSdkErrors = options.generateSdkErrors; if (needsRecompute) { _invalidateAllLocalResolutionInformation(false); } } @override void set analysisPriorityOrder(List<Source> sources) { if (sources == null || sources.isEmpty) { _priorityOrder = Source.EMPTY_ARRAY; } else { while (sources.remove(null)) { // Nothing else to do. } if (sources.isEmpty) { _priorityOrder = Source.EMPTY_ARRAY; } // // Cap the size of the priority list to being less than the cache size. // Failure to do so can result in an infinite loop in // performAnalysisTask() because re-caching one AST structure // can cause another priority source's AST structure to be flushed. // int count = math.min( sources.length, _options.cacheSize - _PRIORITY_ORDER_SIZE_DELTA); _priorityOrder = new List<Source>(count); for (int i = 0; i < count; i++) { _priorityOrder[i] = sources[i]; } // Ensure entries for every priority source. for (var source in _priorityOrder) { SourceEntry entry = _getReadableSourceEntry(source); if (entry == null) { _createSourceEntry(source, false); } } } } @override set contentCache(ContentCache value) { _contentCache = value; } @override DeclaredVariables get declaredVariables => _declaredVariables; @override List<Source> get htmlSources => _getSources(SourceKind.HTML); @override bool get isDisposed => _disposed; @override List<Source> get launchableClientLibrarySources { // TODO(brianwilkerson) This needs to filter out libraries that do not // reference dart:html, either directly or indirectly. List<Source> sources = new List<Source>(); MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { Source source = iterator.key; SourceEntry sourceEntry = iterator.value; if (sourceEntry.kind == SourceKind.LIBRARY && !source.isInSystemLibrary) { // DartEntry dartEntry = (DartEntry) sourceEntry; // if (dartEntry.getValue(DartEntry.IS_LAUNCHABLE) && dartEntry.getValue(DartEntry.IS_CLIENT)) { sources.add(source); // } } } return sources; } @override List<Source> get launchableServerLibrarySources { // TODO(brianwilkerson) This needs to filter out libraries that reference // dart:html, either directly or indirectly. List<Source> sources = new List<Source>(); MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { Source source = iterator.key; SourceEntry sourceEntry = iterator.value; if (sourceEntry.kind == SourceKind.LIBRARY && !source.isInSystemLibrary) { // DartEntry dartEntry = (DartEntry) sourceEntry; // if (dartEntry.getValue(DartEntry.IS_LAUNCHABLE) && !dartEntry.getValue(DartEntry.IS_CLIENT)) { sources.add(source); // } } } return sources; } @override List<Source> get librarySources => _getSources(SourceKind.LIBRARY); /** * Look through the cache for a task that needs to be performed. Return the * task that was found, or `null` if there is no more work to be done. */ AnalysisTask get nextAnalysisTask { bool hintsEnabled = _options.hint; bool lintsEnabled = _options.lint; bool hasBlockedTask = false; // // Look for incremental analysis // if (_incrementalAnalysisCache != null && _incrementalAnalysisCache.hasWork) { AnalysisTask task = new IncrementalAnalysisTask(this, _incrementalAnalysisCache); _incrementalAnalysisCache = null; return task; } // // Look for a source that needs to be analyzed because it has futures // pending. // if (_pendingFutureSources.isNotEmpty) { List<Source> sourcesToRemove = <Source>[]; AnalysisTask task; for (Source source in _pendingFutureSources.keys) { SourceEntry sourceEntry = _cache.get(source); List<PendingFuture> pendingFutures = _pendingFutureSources[source]; for (int i = 0; i < pendingFutures.length;) { if (pendingFutures[i].evaluate(sourceEntry)) { pendingFutures.removeAt(i); } else { i++; } } if (pendingFutures.isEmpty) { sourcesToRemove.add(source); continue; } AnalysisContextImpl_TaskData taskData = _getNextAnalysisTaskForSource( source, sourceEntry, true, hintsEnabled, lintsEnabled); task = taskData.task; if (task != null) { break; } else if (taskData.isBlocked) { hasBlockedTask = true; } else { // There is no more work to do for this task, so forcibly complete // all its pending futures. for (PendingFuture pendingFuture in pendingFutures) { pendingFuture.forciblyComplete(); } sourcesToRemove.add(source); } } for (Source source in sourcesToRemove) { _pendingFutureSources.remove(source); } if (task != null) { return task; } } // // Look for a priority source that needs to be analyzed. // int priorityCount = _priorityOrder.length; for (int i = 0; i < priorityCount; i++) { Source source = _priorityOrder[i]; AnalysisContextImpl_TaskData taskData = _getNextAnalysisTaskForSource( source, _cache.get(source), true, hintsEnabled, lintsEnabled); AnalysisTask task = taskData.task; if (task != null) { return task; } else if (taskData.isBlocked) { hasBlockedTask = true; } } if (_neededForResolution != null) { List<Source> sourcesToRemove = new List<Source>(); for (Source source in _neededForResolution) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; if (!dartEntry.hasResolvableCompilationUnit) { if (dartEntry.getState(DartEntry.PARSED_UNIT) == CacheState.ERROR) { sourcesToRemove.add(source); } else { AnalysisContextImpl_TaskData taskData = _createParseDartTask(source, dartEntry); AnalysisTask task = taskData.task; if (task != null) { return task; } else if (taskData.isBlocked) { hasBlockedTask = true; } } } } } int count = sourcesToRemove.length; for (int i = 0; i < count; i++) { _neededForResolution.remove(sourcesToRemove[i]); } } // // Look for a non-priority source that needs to be analyzed. // List<Source> sourcesToRemove = new List<Source>(); WorkManager_WorkIterator sources = _workManager.iterator(); try { while (sources.hasNext) { Source source = sources.next(); AnalysisContextImpl_TaskData taskData = _getNextAnalysisTaskForSource( source, _cache.get(source), false, hintsEnabled, lintsEnabled); AnalysisTask task = taskData.task; if (task != null) { return task; } else if (taskData.isBlocked) { hasBlockedTask = true; } else { sourcesToRemove.add(source); } } } finally { int count = sourcesToRemove.length; for (int i = 0; i < count; i++) { _workManager.remove(sourcesToRemove[i]); } } if (hasBlockedTask) { // All of the analysis work is blocked waiting for an asynchronous task // to complete. return WaitForAsyncTask.instance; } return null; } @override Stream<SourcesChangedEvent> get onSourcesChanged => _onSourcesChangedController.stream; /** * Make _pendingFutureSources available to unit tests. */ HashMap<Source, List<PendingFuture>> get pendingFutureSources_forTesting => _pendingFutureSources; @override List<Source> get prioritySources => _priorityOrder; @override List<Source> get refactoringUnsafeSources { List<Source> sources = new List<Source>(); MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { SourceEntry sourceEntry = iterator.value; if (sourceEntry is DartEntry) { Source source = iterator.key; if (!source.isInSystemLibrary && !sourceEntry.isRefactoringSafe) { sources.add(source); } } } return sources; } @override SourceFactory get sourceFactory => _sourceFactory; @override void set sourceFactory(SourceFactory factory) { if (identical(_sourceFactory, factory)) { return; } else if (factory.context != null) { throw new IllegalStateException( "Source factories cannot be shared between contexts"); } if (_sourceFactory != null) { _sourceFactory.context = null; } factory.context = this; _sourceFactory = factory; _coreLibrarySource = _sourceFactory.forUri(DartSdk.DART_CORE); _asyncLibrarySource = _sourceFactory.forUri(DartSdk.DART_ASYNC); _cache = createCacheFromSourceFactory(factory); _invalidateAllLocalResolutionInformation(true); } @override List<Source> get sources { List<Source> sources = new List<Source>(); MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { sources.add(iterator.key); } return sources; } /** * Return a list of the sources that would be processed by * [performAnalysisTask]. This method duplicates, and must therefore be kept * in sync with, [getNextAnalysisTask]. This method is intended to be used for * testing purposes only. */ List<Source> get sourcesNeedingProcessing { HashSet<Source> sources = new HashSet<Source>(); bool hintsEnabled = _options.hint; bool lintsEnabled = _options.lint; // // Look for priority sources that need to be analyzed. // for (Source source in _priorityOrder) { _getSourcesNeedingProcessing(source, _cache.get(source), true, hintsEnabled, lintsEnabled, sources); } // // Look for non-priority sources that need to be analyzed. // WorkManager_WorkIterator iterator = _workManager.iterator(); while (iterator.hasNext) { Source source = iterator.next(); _getSourcesNeedingProcessing(source, _cache.get(source), false, hintsEnabled, lintsEnabled, sources); } return new List<Source>.from(sources); } @override AnalysisContextStatistics get statistics { AnalysisContextStatisticsImpl statistics = new AnalysisContextStatisticsImpl(); visitCacheItems(statistics._internalPutCacheItem); statistics.partitionData = _cache.partitionData; return statistics; } IncrementalAnalysisCache get test_incrementalAnalysisCache { return _incrementalAnalysisCache; } set test_incrementalAnalysisCache(IncrementalAnalysisCache value) { _incrementalAnalysisCache = value; } List<Source> get test_priorityOrder => _priorityOrder; @override TypeProvider get typeProvider { if (_typeProvider != null) { return _typeProvider; } Source coreSource = sourceFactory.forUri(DartSdk.DART_CORE); if (coreSource == null) { throw new AnalysisException("Could not create a source for dart:core"); } LibraryElement coreElement = computeLibraryElement(coreSource); if (coreElement == null) { throw new AnalysisException("Could not create an element for dart:core"); } Source asyncSource = sourceFactory.forUri(DartSdk.DART_ASYNC); if (asyncSource == null) { throw new AnalysisException("Could not create a source for dart:async"); } LibraryElement asyncElement = computeLibraryElement(asyncSource); if (asyncElement == null) { throw new AnalysisException("Could not create an element for dart:async"); } _typeProvider = new TypeProviderImpl(coreElement, asyncElement); return _typeProvider; } /** * Sets the [TypeProvider] for this context. */ void set typeProvider(TypeProvider typeProvider) { _typeProvider = typeProvider; } @override void addListener(AnalysisListener listener) { if (!_listeners.contains(listener)) { _listeners.add(listener); } } @override void addSourceInfo(Source source, SourceEntry info) { // This implementation assumes that the access to the cache does not need to // be synchronized because no other object can have access to this context // while this method is being invoked. _cache.put(source, info); } @override void applyAnalysisDelta(AnalysisDelta delta) { ChangeSet changeSet = new ChangeSet(); delta.analysisLevels.forEach((Source source, AnalysisLevel level) { if (level == AnalysisLevel.NONE) { changeSet.removedSource(source); } else { changeSet.addedSource(source); } }); applyChanges(changeSet); } @override void applyChanges(ChangeSet changeSet) { if (changeSet.isEmpty) { return; } // // First, compute the list of sources that have been removed. // List<Source> removedSources = new List<Source>.from(changeSet.removedSources); for (SourceContainer container in changeSet.removedContainers) { _addSourcesInContainer(removedSources, container); } // // Then determine which cached results are no longer valid. // for (Source source in changeSet.addedSources) { _sourceAvailable(source); } for (Source source in changeSet.changedSources) { if (_contentCache.getContents(source) != null) { // This source is overridden in the content cache, so the change will // have no effect. Just ignore it to avoid wasting time doing // re-analysis. continue; } _sourceChanged(source); } changeSet.changedContents.forEach((Source key, String value) { _contentsChanged(key, value, false); }); changeSet.changedRanges .forEach((Source source, ChangeSet_ContentChange change) { _contentRangeChanged(source, change.contents, change.offset, change.oldLength, change.newLength); }); for (Source source in changeSet.deletedSources) { _sourceDeleted(source); } for (Source source in removedSources) { _sourceRemoved(source); } _onSourcesChangedController.add(new SourcesChangedEvent(changeSet)); } @override String computeDocumentationComment(Element element) { if (element == null) { return null; } Source source = element.source; if (source == null) { return null; } CompilationUnit unit = parseCompilationUnit(source); if (unit == null) { return null; } NodeLocator locator = new NodeLocator.con1(element.nameOffset); AstNode nameNode = locator.searchWithin(unit); while (nameNode != null) { if (nameNode is AnnotatedNode) { Comment comment = nameNode.documentationComment; if (comment == null) { return null; } StringBuffer buffer = new StringBuffer(); List<Token> tokens = comment.tokens; for (int i = 0; i < tokens.length; i++) { if (i > 0) { buffer.write("\n"); } buffer.write(tokens[i].lexeme); } return buffer.toString(); } nameNode = nameNode.parent; } return null; } @override List<AnalysisError> computeErrors(Source source) { bool enableHints = _options.hint; bool enableLints = _options.lint; SourceEntry sourceEntry = _getReadableSourceEntry(source); if (sourceEntry is DartEntry) { List<AnalysisError> errors = new List<AnalysisError>(); try { DartEntry dartEntry = sourceEntry; ListUtilities.addAll( errors, _getDartScanData(source, dartEntry, DartEntry.SCAN_ERRORS)); dartEntry = _getReadableDartEntry(source); ListUtilities.addAll(errors, _getDartParseData(source, dartEntry, DartEntry.PARSE_ERRORS)); dartEntry = _getReadableDartEntry(source); if (dartEntry.getValue(DartEntry.SOURCE_KIND) == SourceKind.LIBRARY) { ListUtilities.addAll(errors, _getDartResolutionData( source, source, dartEntry, DartEntry.RESOLUTION_ERRORS)); dartEntry = _getReadableDartEntry(source); ListUtilities.addAll(errors, _getDartVerificationData( source, source, dartEntry, DartEntry.VERIFICATION_ERRORS)); if (enableHints) { dartEntry = _getReadableDartEntry(source); ListUtilities.addAll(errors, _getDartHintData(source, source, dartEntry, DartEntry.HINTS)); } if (enableLints) { dartEntry = _getReadableDartEntry(source); ListUtilities.addAll(errors, _getDartLintData(source, source, dartEntry, DartEntry.LINTS)); } } else { List<Source> libraries = getLibrariesContaining(source); for (Source librarySource in libraries) { ListUtilities.addAll(errors, _getDartResolutionData( source, librarySource, dartEntry, DartEntry.RESOLUTION_ERRORS)); dartEntry = _getReadableDartEntry(source); ListUtilities.addAll(errors, _getDartVerificationData(source, librarySource, dartEntry, DartEntry.VERIFICATION_ERRORS)); if (enableHints) { dartEntry = _getReadableDartEntry(source); ListUtilities.addAll(errors, _getDartHintData( source, librarySource, dartEntry, DartEntry.HINTS)); } if (enableLints) { dartEntry = _getReadableDartEntry(source); ListUtilities.addAll(errors, _getDartLintData( source, librarySource, dartEntry, DartEntry.LINTS)); } } } } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not compute errors", new CaughtException(exception, stackTrace)); } if (errors.isEmpty) { return AnalysisError.NO_ERRORS; } return errors; } else if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; try { return _getHtmlResolutionData2( source, htmlEntry, HtmlEntry.RESOLUTION_ERRORS); } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not compute errors", new CaughtException(exception, stackTrace)); } } return AnalysisError.NO_ERRORS; } @override List<Source> computeExportedLibraries(Source source) => _getDartParseData2( source, DartEntry.EXPORTED_LIBRARIES, Source.EMPTY_ARRAY); @override HtmlElement computeHtmlElement(Source source) => _getHtmlResolutionData(source, HtmlEntry.ELEMENT, null); @override List<Source> computeImportedLibraries(Source source) => _getDartParseData2( source, DartEntry.IMPORTED_LIBRARIES, Source.EMPTY_ARRAY); @override SourceKind computeKindOf(Source source) { SourceEntry sourceEntry = _getReadableSourceEntry(source); if (sourceEntry == null) { return SourceKind.UNKNOWN; } else if (sourceEntry is DartEntry) { try { return _getDartParseData(source, sourceEntry, DartEntry.SOURCE_KIND); } on AnalysisException { return SourceKind.UNKNOWN; } } return sourceEntry.kind; } @override LibraryElement computeLibraryElement(Source source) => _getDartResolutionData2(source, source, DartEntry.ELEMENT, null); @override LineInfo computeLineInfo(Source source) { SourceEntry sourceEntry = _getReadableSourceEntry(source); try { if (sourceEntry is HtmlEntry) { return _getHtmlParseData(source, SourceEntry.LINE_INFO, null); } else if (sourceEntry is DartEntry) { return _getDartScanData2(source, SourceEntry.LINE_INFO, null); } } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not compute ${SourceEntry.LINE_INFO}", new CaughtException(exception, stackTrace)); } return null; } @override CompilationUnit computeResolvableCompilationUnit(Source source) { DartEntry dartEntry = _getReadableDartEntry(source); if (dartEntry == null) { throw new AnalysisException( "computeResolvableCompilationUnit for non-Dart: ${source.fullName}"); } dartEntry = _cacheDartParseData(source, dartEntry, DartEntry.PARSED_UNIT); CompilationUnit unit = dartEntry.resolvableCompilationUnit; if (unit == null) { throw new AnalysisException( "Internal error: computeResolvableCompilationUnit could not parse ${source.fullName}", new CaughtException(dartEntry.exception, null)); } return unit; } @override CancelableFuture<CompilationUnit> computeResolvedCompilationUnitAsync( Source unitSource, Source librarySource) { return new _AnalysisFutureHelper<CompilationUnit>(this).computeAsync( unitSource, (SourceEntry sourceEntry) { if (sourceEntry is DartEntry) { if (sourceEntry.getStateInLibrary( DartEntry.RESOLVED_UNIT, librarySource) == CacheState.ERROR) { throw sourceEntry.exception; } return sourceEntry.getValueInLibrary( DartEntry.RESOLVED_UNIT, librarySource); } throw new AnalysisNotScheduledError(); }); } /** * Create an analysis cache based on the given source [factory]. */ AnalysisCache createCacheFromSourceFactory(SourceFactory factory) { if (factory == null) { return new AnalysisCache(<CachePartition>[_privatePartition]); } DartSdk sdk = factory.dartSdk; if (sdk == null) { return new AnalysisCache(<CachePartition>[_privatePartition]); } return new AnalysisCache(<CachePartition>[ AnalysisEngine.instance.partitionManager.forSdk(sdk), _privatePartition ]); } @override void dispose() { _disposed = true; for (List<PendingFuture> pendingFutures in _pendingFutureSources.values) { for (PendingFuture pendingFuture in pendingFutures) { pendingFuture.forciblyComplete(); } } _pendingFutureSources.clear(); } @override List<CompilationUnit> ensureResolvedDartUnits(Source unitSource) { SourceEntry sourceEntry = _cache.get(unitSource); if (sourceEntry is! DartEntry) { return null; } DartEntry dartEntry = sourceEntry; // Check every library. List<CompilationUnit> units = <CompilationUnit>[]; List<Source> containingLibraries = dartEntry.containingLibraries; for (Source librarySource in containingLibraries) { CompilationUnit unit = dartEntry.getValueInLibrary(DartEntry.RESOLVED_UNIT, librarySource); if (unit == null) { units = null; break; } units.add(unit); } // Invalidate the flushed RESOLVED_UNIT to force it eventually. if (units == null) { bool shouldBeScheduled = false; for (Source librarySource in containingLibraries) { if (dartEntry.getStateInLibrary( DartEntry.RESOLVED_UNIT, librarySource) == CacheState.FLUSHED) { dartEntry.setStateInLibrary( DartEntry.RESOLVED_UNIT, librarySource, CacheState.INVALID); shouldBeScheduled = true; } } if (shouldBeScheduled) { _workManager.add(unitSource, SourcePriority.UNKNOWN); } // We cannot provide resolved units right now, // but the future analysis will. return null; } // done return units; } @override bool exists(Source source) { if (source == null) { return false; } if (_contentCache.getContents(source) != null) { return true; } return source.exists(); } Element findElementById(int id) { _ElementByIdFinder finder = new _ElementByIdFinder(id); try { MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { SourceEntry sourceEntry = iterator.value; if (sourceEntry.kind == SourceKind.LIBRARY) { DartEntry dartEntry = sourceEntry; LibraryElement library = dartEntry.getValue(DartEntry.ELEMENT); if (library != null) { library.accept(finder); } } } } on _ElementByIdFinderException { return finder.result; } return null; } @override CompilationUnitElement getCompilationUnitElement( Source unitSource, Source librarySource) { LibraryElement libraryElement = getLibraryElement(librarySource); if (libraryElement != null) { // try defining unit CompilationUnitElement definingUnit = libraryElement.definingCompilationUnit; if (definingUnit.source == unitSource) { return definingUnit; } // try parts for (CompilationUnitElement partUnit in libraryElement.parts) { if (partUnit.source == unitSource) { return partUnit; } } } return null; } @override TimestampedData<String> getContents(Source source) { String contents = _contentCache.getContents(source); if (contents != null) { return new TimestampedData<String>( _contentCache.getModificationStamp(source), contents); } return source.contents; } @override InternalAnalysisContext getContextFor(Source source) { InternalAnalysisContext context = _cache.getContextFor(source); return context == null ? this : context; } @override Element getElement(ElementLocation location) { // TODO(brianwilkerson) This should not be a "get" method. try { List<String> components = location.components; Source source = _computeSourceFromEncoding(components[0]); String sourceName = source.shortName; if (AnalysisEngine.isDartFileName(sourceName)) { ElementImpl element = computeLibraryElement(source) as ElementImpl; for (int i = 1; i < components.length; i++) { if (element == null) { return null; } element = element.getChild(components[i]); } return element; } if (AnalysisEngine.isHtmlFileName(sourceName)) { return computeHtmlElement(source); } } catch (exception) { // If the location cannot be decoded for some reason then the underlying // cause should have been logged already and we can fall though to return // null. } return null; } @override AnalysisErrorInfo getErrors(Source source) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(source); if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; return new AnalysisErrorInfoImpl( dartEntry.allErrors, dartEntry.getValue(SourceEntry.LINE_INFO)); } else if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; return new AnalysisErrorInfoImpl( htmlEntry.allErrors, htmlEntry.getValue(SourceEntry.LINE_INFO)); } return new AnalysisErrorInfoImpl(AnalysisError.NO_ERRORS, null); } @override HtmlElement getHtmlElement(Source source) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(source); if (sourceEntry is HtmlEntry) { return sourceEntry.getValue(HtmlEntry.ELEMENT); } return null; } @override List<Source> getHtmlFilesReferencing(Source source) { SourceKind sourceKind = getKindOf(source); if (sourceKind == null) { return Source.EMPTY_ARRAY; } List<Source> htmlSources = new List<Source>(); while (true) { if (sourceKind == SourceKind.PART) { List<Source> librarySources = getLibrariesContaining(source); MapIterator<Source, SourceEntry> partIterator = _cache.iterator(); while (partIterator.moveNext()) { SourceEntry sourceEntry = partIterator.value; if (sourceEntry.kind == SourceKind.HTML) { List<Source> referencedLibraries = (sourceEntry as HtmlEntry) .getValue(HtmlEntry.REFERENCED_LIBRARIES); if (_containsAny(referencedLibraries, librarySources)) { htmlSources.add(partIterator.key); } } } } else { MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { SourceEntry sourceEntry = iterator.value; if (sourceEntry.kind == SourceKind.HTML) { List<Source> referencedLibraries = (sourceEntry as HtmlEntry) .getValue(HtmlEntry.REFERENCED_LIBRARIES); if (_contains(referencedLibraries, source)) { htmlSources.add(iterator.key); } } } } break; } if (htmlSources.isEmpty) { return Source.EMPTY_ARRAY; } return htmlSources; } @override SourceKind getKindOf(Source source) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(source); if (sourceEntry == null) { return SourceKind.UNKNOWN; } return sourceEntry.kind; } @override List<Source> getLibrariesContaining(Source source) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(source); if (sourceEntry is DartEntry) { return sourceEntry.containingLibraries; } return Source.EMPTY_ARRAY; } @override List<Source> getLibrariesDependingOn(Source librarySource) { List<Source> dependentLibraries = new List<Source>(); MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { SourceEntry sourceEntry = iterator.value; if (sourceEntry.kind == SourceKind.LIBRARY) { if (_contains( (sourceEntry as DartEntry).getValue(DartEntry.EXPORTED_LIBRARIES), librarySource)) { dependentLibraries.add(iterator.key); } if (_contains( (sourceEntry as DartEntry).getValue(DartEntry.IMPORTED_LIBRARIES), librarySource)) { dependentLibraries.add(iterator.key); } } } if (dependentLibraries.isEmpty) { return Source.EMPTY_ARRAY; } return dependentLibraries; } @override List<Source> getLibrariesReferencedFromHtml(Source htmlSource) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(htmlSource); if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; return htmlEntry.getValue(HtmlEntry.REFERENCED_LIBRARIES); } return Source.EMPTY_ARRAY; } @override LibraryElement getLibraryElement(Source source) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(source); if (sourceEntry is DartEntry) { return sourceEntry.getValue(DartEntry.ELEMENT); } return null; } @override LineInfo getLineInfo(Source source) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(source); if (sourceEntry != null) { return sourceEntry.getValue(SourceEntry.LINE_INFO); } return null; } @override int getModificationStamp(Source source) { int stamp = _contentCache.getModificationStamp(source); if (stamp != null) { return stamp; } return source.modificationStamp; } @override Namespace getPublicNamespace(LibraryElement library) { // TODO(brianwilkerson) Rename this to not start with 'get'. // Note that this is not part of the API of the interface. Source source = library.definingCompilationUnit.source; DartEntry dartEntry = _getReadableDartEntry(source); if (dartEntry == null) { return null; } Namespace namespace = null; if (identical(dartEntry.getValue(DartEntry.ELEMENT), library)) { namespace = dartEntry.getValue(DartEntry.PUBLIC_NAMESPACE); } if (namespace == null) { NamespaceBuilder builder = new NamespaceBuilder(); namespace = builder.createPublicNamespaceForLibrary(library); if (dartEntry == null) { AnalysisEngine.instance.logger.logError( "Could not compute the public namespace for ${library.source.fullName}", new CaughtException(new AnalysisException( "A Dart file became a non-Dart file: ${source.fullName}"), null)); return null; } if (identical(dartEntry.getValue(DartEntry.ELEMENT), library)) { dartEntry.setValue(DartEntry.PUBLIC_NAMESPACE, namespace); } } return namespace; } /** * Return the cache entry associated with the given [source], or `null` if * there is no entry associated with the source. */ SourceEntry getReadableSourceEntryOrNull(Source source) => _cache.get(source); @override CompilationUnit getResolvedCompilationUnit( Source unitSource, LibraryElement library) { if (library == null) { return null; } return getResolvedCompilationUnit2(unitSource, library.source); } @override CompilationUnit getResolvedCompilationUnit2( Source unitSource, Source librarySource) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(unitSource); if (sourceEntry is DartEntry) { return sourceEntry.getValueInLibrary( DartEntry.RESOLVED_UNIT, librarySource); } return null; } @override ht.HtmlUnit getResolvedHtmlUnit(Source htmlSource) { SourceEntry sourceEntry = getReadableSourceEntryOrNull(htmlSource); if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; return htmlEntry.getValue(HtmlEntry.RESOLVED_UNIT); } return null; } @override List<Source> getSourcesWithFullName(String path) { List<Source> sources = <Source>[]; MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { if (iterator.key.fullName == path) { sources.add(iterator.key); } } return sources; } @override bool handleContentsChanged( Source source, String originalContents, String newContents, bool notify) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry == null) { return false; } bool changed = newContents != originalContents; if (newContents != null) { if (newContents != originalContents) { _incrementalAnalysisCache = IncrementalAnalysisCache.clear(_incrementalAnalysisCache, source); if (!analysisOptions.incremental || !_tryPoorMansIncrementalResolution(source, newContents)) { _sourceChanged(source); } sourceEntry.modificationTime = _contentCache.getModificationStamp(source); sourceEntry.setValue(SourceEntry.CONTENT, newContents); } else { sourceEntry.modificationTime = _contentCache.getModificationStamp(source); } } else if (originalContents != null) { _incrementalAnalysisCache = IncrementalAnalysisCache.clear(_incrementalAnalysisCache, source); changed = newContents != originalContents; // We are removing the overlay for the file, check if the file's // contents is the same as it was in the overlay. try { TimestampedData<String> fileContents = getContents(source); String fileContentsData = fileContents.data; if (fileContentsData == originalContents) { sourceEntry.setValue(SourceEntry.CONTENT, fileContentsData); sourceEntry.modificationTime = fileContents.modificationTime; changed = false; } } catch (e) {} // If not the same content (e.g. the file is being closed without save), // then force analysis. if (changed) { _sourceChanged(source); } } if (notify && changed) { _onSourcesChangedController .add(new SourcesChangedEvent.changedContent(source, newContents)); } return changed; } /** * Invalidates hints in the given [librarySource] and included parts. */ void invalidateLibraryHints(Source librarySource) { SourceEntry sourceEntry = _cache.get(librarySource); if (sourceEntry is! DartEntry) { return; } DartEntry dartEntry = sourceEntry; // Prepare sources to invalidate hints in. List<Source> sources = <Source>[librarySource]; sources.addAll(dartEntry.getValue(DartEntry.INCLUDED_PARTS)); // Invalidate hints. for (Source source in sources) { DartEntry dartEntry = _cache.get(source); if (dartEntry.getStateInLibrary(DartEntry.HINTS, librarySource) == CacheState.VALID) { dartEntry.setStateInLibrary( DartEntry.HINTS, librarySource, CacheState.INVALID); } } } @override bool isClientLibrary(Source librarySource) { SourceEntry sourceEntry = _getReadableSourceEntry(librarySource); if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; return dartEntry.getValue(DartEntry.IS_CLIENT) && dartEntry.getValue(DartEntry.IS_LAUNCHABLE); } return false; } @override bool isServerLibrary(Source librarySource) { SourceEntry sourceEntry = _getReadableSourceEntry(librarySource); if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; return !dartEntry.getValue(DartEntry.IS_CLIENT) && dartEntry.getValue(DartEntry.IS_LAUNCHABLE); } return false; } @override CompilationUnit parseCompilationUnit(Source source) => _getDartParseData2(source, DartEntry.PARSED_UNIT, null); @override ht.HtmlUnit parseHtmlUnit(Source source) => _getHtmlParseData(source, HtmlEntry.PARSED_UNIT, null); @override AnalysisResult performAnalysisTask() { if (_TRACE_PERFORM_TASK) { print("----------------------------------------"); } return PerformanceStatistics.performAnaysis.makeCurrentWhile(() { int getStart = JavaSystem.currentTimeMillis(); AnalysisTask task = PerformanceStatistics.nextTask .makeCurrentWhile(() => nextAnalysisTask); int getEnd = JavaSystem.currentTimeMillis(); if (task == null && _validateCacheConsistency()) { task = nextAnalysisTask; } if (task == null) { _validateLastIncrementalResolutionResult(); if (_performAnalysisTaskStopwatch != null) { AnalysisEngine.instance.instrumentationService.logPerformance( AnalysisPerformanceKind.FULL, _performAnalysisTaskStopwatch, 'context_id=$_id'); _performAnalysisTaskStopwatch = null; } return new AnalysisResult( _getChangeNotices(true), getEnd - getStart, null, -1); } if (_performAnalysisTaskStopwatch == null) { _performAnalysisTaskStopwatch = new Stopwatch()..start(); } String taskDescription = task.toString(); _notifyAboutToPerformTask(taskDescription); if (_TRACE_PERFORM_TASK) { print(taskDescription); } int performStart = JavaSystem.currentTimeMillis(); try { task.perform(_resultRecorder); } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not perform analysis task: $taskDescription", new CaughtException(exception, stackTrace)); } on AnalysisException catch (exception, stackTrace) { if (exception.cause is! JavaIOException) { AnalysisEngine.instance.logger.logError( "Internal error while performing the task: $task", new CaughtException(exception, stackTrace)); } } int performEnd = JavaSystem.currentTimeMillis(); List<ChangeNotice> notices = _getChangeNotices(false); int noticeCount = notices.length; for (int i = 0; i < noticeCount; i++) { ChangeNotice notice = notices[i]; Source source = notice.source; // TODO(brianwilkerson) Figure out whether the compilation unit is // always resolved, or whether we need to decide whether to invoke the // "parsed" or "resolved" method. This might be better done when // recording task results in order to reduce the chance of errors. // if (notice.getCompilationUnit() != null) { // notifyResolvedDart(source, notice.getCompilationUnit()); // } else if (notice.getHtmlUnit() != null) { // notifyResolvedHtml(source, notice.getHtmlUnit()); // } _notifyErrors(source, notice.errors, notice.lineInfo); } return new AnalysisResult(notices, getEnd - getStart, task.runtimeType.toString(), performEnd - performStart); }); } @override void recordLibraryElements(Map<Source, LibraryElement> elementMap) { Source htmlSource = _sourceFactory.forUri(DartSdk.DART_HTML); elementMap.forEach((Source librarySource, LibraryElement library) { // // Cache the element in the library's info. // DartEntry dartEntry = _getReadableDartEntry(librarySource); if (dartEntry != null) { _recordElementData(dartEntry, library, library.source, htmlSource); dartEntry.setState(SourceEntry.CONTENT, CacheState.FLUSHED); dartEntry.setValue(SourceEntry.LINE_INFO, new LineInfo(<int>[0])); // DartEntry.ELEMENT - set in recordElementData dartEntry.setValue(DartEntry.EXPORTED_LIBRARIES, Source.EMPTY_ARRAY); dartEntry.setValue(DartEntry.IMPORTED_LIBRARIES, Source.EMPTY_ARRAY); dartEntry.setValue(DartEntry.INCLUDED_PARTS, Source.EMPTY_ARRAY); // DartEntry.IS_CLIENT - set in recordElementData // DartEntry.IS_LAUNCHABLE - set in recordElementData dartEntry.setValue(DartEntry.PARSE_ERRORS, AnalysisError.NO_ERRORS); dartEntry.setState(DartEntry.PARSED_UNIT, CacheState.FLUSHED); dartEntry.setState(DartEntry.PUBLIC_NAMESPACE, CacheState.FLUSHED); dartEntry.setValue(DartEntry.SCAN_ERRORS, AnalysisError.NO_ERRORS); dartEntry.setValue(DartEntry.SOURCE_KIND, SourceKind.LIBRARY); dartEntry.setState(DartEntry.TOKEN_STREAM, CacheState.FLUSHED); dartEntry.setValueInLibrary(DartEntry.RESOLUTION_ERRORS, librarySource, AnalysisError.NO_ERRORS); dartEntry.setStateInLibrary( DartEntry.RESOLVED_UNIT, librarySource, CacheState.FLUSHED); dartEntry.setValueInLibrary(DartEntry.VERIFICATION_ERRORS, librarySource, AnalysisError.NO_ERRORS); dartEntry.setValueInLibrary( DartEntry.HINTS, librarySource, AnalysisError.NO_ERRORS); dartEntry.setValueInLibrary( DartEntry.LINTS, librarySource, AnalysisError.NO_ERRORS); } }); } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry recordResolveDartLibraryCycleTaskResults( ResolveDartLibraryCycleTask task) { LibraryResolver2 resolver = task.libraryResolver; CaughtException thrownException = task.exception; Source unitSource = task.unitSource; DartEntry unitEntry = _getReadableDartEntry(unitSource); if (resolver != null) { // // The resolver should only be null if an exception was thrown before (or // while) it was being created. // List<ResolvableLibrary> resolvedLibraries = resolver.resolvedLibraries; if (resolvedLibraries == null) { // // The resolved libraries should only be null if an exception was thrown // during resolution. // if (thrownException == null) { var message = "In recordResolveDartLibraryCycleTaskResults, " "resolvedLibraries was null and there was no thrown exception"; unitEntry.recordResolutionError( new CaughtException(new AnalysisException(message), null)); } else { unitEntry.recordResolutionError(thrownException); } _cache.remove(unitSource); if (thrownException != null) { throw new AnalysisException('<rethrow>', thrownException); } return unitEntry; } Source htmlSource = sourceFactory.forUri(DartSdk.DART_HTML); RecordingErrorListener errorListener = resolver.errorListener; for (ResolvableLibrary library in resolvedLibraries) { Source librarySource = library.librarySource; for (Source source in library.compilationUnitSources) { CompilationUnit unit = library.getAST(source); List<AnalysisError> errors = errorListener.getErrorsForSource(source); LineInfo lineInfo = getLineInfo(source); DartEntry dartEntry = _cache.get(source); if (thrownException == null) { dartEntry.setState(DartEntry.PARSED_UNIT, CacheState.FLUSHED); dartEntry.setValueInLibrary( DartEntry.RESOLVED_UNIT, librarySource, unit); dartEntry.setValueInLibrary( DartEntry.RESOLUTION_ERRORS, librarySource, errors); if (source == librarySource) { _recordElementData( dartEntry, library.libraryElement, librarySource, htmlSource); } _cache.storedAst(source); } else { dartEntry.recordResolutionErrorInLibrary( librarySource, thrownException); } if (source != librarySource) { _workManager.add(source, SourcePriority.PRIORITY_PART); } ChangeNoticeImpl notice = _getNotice(source); notice.resolvedDartUnit = unit; notice.setErrors(dartEntry.allErrors, lineInfo); } } } if (thrownException != null) { throw new AnalysisException('<rethrow>', thrownException); } return unitEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry recordResolveDartLibraryTaskResults(ResolveDartLibraryTask task) { LibraryResolver resolver = task.libraryResolver; CaughtException thrownException = task.exception; Source unitSource = task.unitSource; DartEntry unitEntry = _getReadableDartEntry(unitSource); if (resolver != null) { // // The resolver should only be null if an exception was thrown before (or // while) it was being created. // Set<Library> resolvedLibraries = resolver.resolvedLibraries; if (resolvedLibraries == null) { // // The resolved libraries should only be null if an exception was thrown // during resolution. // if (thrownException == null) { String message = "In recordResolveDartLibraryTaskResults, " "resolvedLibraries was null and there was no thrown exception"; unitEntry.recordResolutionError( new CaughtException(new AnalysisException(message), null)); } else { unitEntry.recordResolutionError(thrownException); } _cache.remove(unitSource); if (thrownException != null) { throw new AnalysisException('<rethrow>', thrownException); } return unitEntry; } Source htmlSource = sourceFactory.forUri(DartSdk.DART_HTML); RecordingErrorListener errorListener = resolver.errorListener; for (Library library in resolvedLibraries) { Source librarySource = library.librarySource; for (Source source in library.compilationUnitSources) { CompilationUnit unit = library.getAST(source); List<AnalysisError> errors = errorListener.getErrorsForSource(source); LineInfo lineInfo = getLineInfo(source); DartEntry dartEntry = _cache.get(source); if (thrownException == null) { dartEntry.setValue(SourceEntry.LINE_INFO, lineInfo); dartEntry.setState(DartEntry.PARSED_UNIT, CacheState.FLUSHED); dartEntry.setValueInLibrary( DartEntry.RESOLVED_UNIT, librarySource, unit); dartEntry.setValueInLibrary( DartEntry.RESOLUTION_ERRORS, librarySource, errors); if (source == librarySource) { _recordElementData( dartEntry, library.libraryElement, librarySource, htmlSource); } _cache.storedAst(source); } else { dartEntry.recordResolutionErrorInLibrary( librarySource, thrownException); _cache.remove(source); } if (source != librarySource) { _workManager.add(source, SourcePriority.PRIORITY_PART); } ChangeNoticeImpl notice = _getNotice(source); notice.resolvedDartUnit = unit; notice.setErrors(dartEntry.allErrors, lineInfo); } } } if (thrownException != null) { throw new AnalysisException('<rethrow>', thrownException); } return unitEntry; } @override void removeListener(AnalysisListener listener) { _listeners.remove(listener); } @override CompilationUnit resolveCompilationUnit( Source unitSource, LibraryElement library) { if (library == null) { return null; } return resolveCompilationUnit2(unitSource, library.source); } @override CompilationUnit resolveCompilationUnit2( Source unitSource, Source librarySource) => _getDartResolutionData2( unitSource, librarySource, DartEntry.RESOLVED_UNIT, null); @override ht.HtmlUnit resolveHtmlUnit(Source htmlSource) { computeHtmlElement(htmlSource); return parseHtmlUnit(htmlSource); } @override void setChangedContents(Source source, String contents, int offset, int oldLength, int newLength) { if (_contentRangeChanged(source, contents, offset, oldLength, newLength)) { _onSourcesChangedController.add(new SourcesChangedEvent.changedRange( source, contents, offset, oldLength, newLength)); } } @override void setContents(Source source, String contents) { _contentsChanged(source, contents, true); } @override void visitCacheItems(void callback(Source source, SourceEntry dartEntry, DataDescriptor rowDesc, CacheState state)) { bool hintsEnabled = _options.hint; bool lintsEnabled = _options.lint; MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { Source source = iterator.key; SourceEntry sourceEntry = iterator.value; for (DataDescriptor descriptor in sourceEntry.descriptors) { if (descriptor == DartEntry.SOURCE_KIND) { // The source kind is always valid, so the state isn't interesting. continue; } else if (descriptor == DartEntry.CONTAINING_LIBRARIES) { // The list of containing libraries is always valid, so the state // isn't interesting. continue; } else if (descriptor == DartEntry.PUBLIC_NAMESPACE) { // The public namespace isn't computed by performAnalysisTask() // and therefore isn't interesting. continue; } else if (descriptor == HtmlEntry.HINTS) { // We are not currently recording any hints related to HTML. continue; } callback( source, sourceEntry, descriptor, sourceEntry.getState(descriptor)); } if (sourceEntry is DartEntry) { // get library-specific values List<Source> librarySources = getLibrariesContaining(source); for (Source librarySource in librarySources) { for (DataDescriptor descriptor in sourceEntry.libraryDescriptors) { if (descriptor == DartEntry.BUILT_ELEMENT || descriptor == DartEntry.BUILT_UNIT) { // These values are not currently being computed, so their state // is not interesting. continue; } else if (!sourceEntry.explicitlyAdded && !_generateImplicitErrors && (descriptor == DartEntry.VERIFICATION_ERRORS || descriptor == DartEntry.HINTS || descriptor == DartEntry.LINTS)) { continue; } else if (source.isInSystemLibrary && !_generateSdkErrors && (descriptor == DartEntry.VERIFICATION_ERRORS || descriptor == DartEntry.HINTS || descriptor == DartEntry.LINTS)) { continue; } else if (!hintsEnabled && descriptor == DartEntry.HINTS) { continue; } else if (!lintsEnabled && descriptor == DartEntry.LINTS) { continue; } callback(librarySource, sourceEntry, descriptor, sourceEntry.getStateInLibrary(descriptor, librarySource)); } } } } } /** * Visit all entries of the content cache. */ void visitContentCache(ContentCacheVisitor visitor) { _contentCache.accept(visitor); } /** * Record that we have accessed the AST structure associated with the given * [source]. At the moment, there is no differentiation between the parsed and * resolved forms of the AST. */ void _accessedAst(Source source) { _cache.accessedAst(source); } /** * Add all of the sources contained in the given source [container] to the * given list of [sources]. */ void _addSourcesInContainer(List<Source> sources, SourceContainer container) { MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { Source source = iterator.key; if (container.contains(source)) { sources.add(source); } } } /** * Given the [unitSource] of a Dart file and the [librarySource] of the * library that contains it, return a cache entry in which the state of the * data represented by the given [descriptor] is either [CacheState.VALID] or * [CacheState.ERROR]. This method assumes that the data can be produced by * generating hints for the library if the data is not already cached. The * [dartEntry] is the cache entry associated with the Dart file. * * Throws an [AnalysisException] if data could not be returned because the * source could not be parsed. */ DartEntry _cacheDartHintData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { // // Check to see whether we already have the information being requested. // CacheState state = dartEntry.getStateInLibrary(descriptor, librarySource); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. // Unless the modification date of the source continues to change, // this loop will eventually terminate. // DartEntry libraryEntry = _getReadableDartEntry(librarySource); libraryEntry = _cacheDartResolutionData( librarySource, librarySource, libraryEntry, DartEntry.ELEMENT); LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); CompilationUnitElement definingUnit = libraryElement.definingCompilationUnit; List<CompilationUnitElement> parts = libraryElement.parts; List<TimestampedData<CompilationUnit>> units = new List<TimestampedData>(parts.length + 1); units[0] = _getResolvedUnit(definingUnit, librarySource); if (units[0] == null) { Source source = definingUnit.source; units[0] = new TimestampedData<CompilationUnit>( getModificationStamp(source), resolveCompilationUnit(source, libraryElement)); } for (int i = 0; i < parts.length; i++) { units[i + 1] = _getResolvedUnit(parts[i], librarySource); if (units[i + 1] == null) { Source source = parts[i].source; units[i + 1] = new TimestampedData<CompilationUnit>( getModificationStamp(source), resolveCompilationUnit(source, libraryElement)); } } dartEntry = new GenerateDartHintsTask( this, units, getLibraryElement(librarySource)) .perform(_resultRecorder) as DartEntry; state = dartEntry.getStateInLibrary(descriptor, librarySource); } return dartEntry; } /** * Given a source for a Dart file and the library that contains it, return a * cache entry in which the state of the data represented by the given * descriptor is either [CacheState.VALID] or [CacheState.ERROR]. This method * assumes that the data can be produced by generating lints for the library * if the data is not already cached. * * Note: This method cannot be used in an async environment. */ DartEntry _cacheDartLintData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { // // Check to see whether we already have the information being requested. // CacheState state = dartEntry.getStateInLibrary(descriptor, librarySource); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. // Unless the modification date of the source continues to change, // this loop will eventually terminate. // DartEntry libraryEntry = _getReadableDartEntry(librarySource); libraryEntry = _cacheDartResolutionData( librarySource, librarySource, libraryEntry, DartEntry.ELEMENT); LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); CompilationUnitElement definingUnit = libraryElement.definingCompilationUnit; List<CompilationUnitElement> parts = libraryElement.parts; List<TimestampedData<CompilationUnit>> units = new List<TimestampedData>(parts.length + 1); units[0] = _getResolvedUnit(definingUnit, librarySource); if (units[0] == null) { Source source = definingUnit.source; units[0] = new TimestampedData<CompilationUnit>( getModificationStamp(source), resolveCompilationUnit(source, libraryElement)); } for (int i = 0; i < parts.length; i++) { units[i + 1] = _getResolvedUnit(parts[i], librarySource); if (units[i + 1] == null) { Source source = parts[i].source; units[i + 1] = new TimestampedData<CompilationUnit>( getModificationStamp(source), resolveCompilationUnit(source, libraryElement)); } } //TODO(pquitslund): revisit if we need all units or whether one will do dartEntry = new GenerateDartLintsTask( this, units, getLibraryElement(librarySource)) .perform(_resultRecorder) as DartEntry; state = dartEntry.getStateInLibrary(descriptor, librarySource); } return dartEntry; } /** * Given a source for a Dart file, return a cache entry in which the state of * the data represented by the given descriptor is either [CacheState.VALID] * or [CacheState.ERROR]. This method assumes that the data can be produced by * parsing the source if it is not already cached. * * Note: This method cannot be used in an async environment. */ DartEntry _cacheDartParseData( Source source, DartEntry dartEntry, DataDescriptor descriptor) { if (identical(descriptor, DartEntry.PARSED_UNIT)) { if (dartEntry.hasResolvableCompilationUnit) { return dartEntry; } } // // Check to see whether we already have the information being requested. // CacheState state = dartEntry.getState(descriptor); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. Unless the modification date of the // source continues to change, this loop will eventually terminate. // dartEntry = _cacheDartScanData(source, dartEntry, DartEntry.TOKEN_STREAM); dartEntry = new ParseDartTask(this, source, dartEntry.getValue(DartEntry.TOKEN_STREAM), dartEntry.getValue(SourceEntry.LINE_INFO)) .perform(_resultRecorder) as DartEntry; state = dartEntry.getState(descriptor); } return dartEntry; } /** * Given a source for a Dart file and the library that contains it, return a * cache entry in which the state of the data represented by the given * descriptor is either [CacheState.VALID] or [CacheState.ERROR]. This method * assumes that the data can be produced by resolving the source in the * context of the library if it is not already cached. * * Note: This method cannot be used in an async environment. */ DartEntry _cacheDartResolutionData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { // // Check to see whether we already have the information being requested. // CacheState state = (identical(descriptor, DartEntry.ELEMENT)) ? dartEntry.getState(descriptor) : dartEntry.getStateInLibrary(descriptor, librarySource); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. Unless the modification date of the // source continues to change, this loop will eventually terminate. // // TODO(brianwilkerson) As an optimization, if we already have the // element model for the library we can use ResolveDartUnitTask to produce // the resolved AST structure much faster. dartEntry = new ResolveDartLibraryTask(this, unitSource, librarySource) .perform(_resultRecorder) as DartEntry; state = (identical(descriptor, DartEntry.ELEMENT)) ? dartEntry.getState(descriptor) : dartEntry.getStateInLibrary(descriptor, librarySource); } return dartEntry; } /** * Given a source for a Dart file, return a cache entry in which the state of * the data represented by the given descriptor is either [CacheState.VALID] * or [CacheState.ERROR]. This method assumes that the data can be produced by * scanning the source if it is not already cached. * * Note: This method cannot be used in an async environment. */ DartEntry _cacheDartScanData( Source source, DartEntry dartEntry, DataDescriptor descriptor) { // // Check to see whether we already have the information being requested. // CacheState state = dartEntry.getState(descriptor); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. Unless the modification date of the // source continues to change, this loop will eventually terminate. // try { if (dartEntry.getState(SourceEntry.CONTENT) != CacheState.VALID) { dartEntry = new GetContentTask(this, source) .perform(_resultRecorder) as DartEntry; } dartEntry = new ScanDartTask( this, source, dartEntry.getValue(SourceEntry.CONTENT)) .perform(_resultRecorder) as DartEntry; } on AnalysisException catch (exception) { throw exception; } catch (exception, stackTrace) { throw new AnalysisException( "Exception", new CaughtException(exception, stackTrace)); } state = dartEntry.getState(descriptor); } return dartEntry; } /** * Given a source for a Dart file and the library that contains it, return a * cache entry in which the state of the data represented by the given * descriptor is either [CacheState.VALID] or [CacheState.ERROR]. This method * assumes that the data can be produced by verifying the source in the given * library if the data is not already cached. * * Note: This method cannot be used in an async environment. */ DartEntry _cacheDartVerificationData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { // // Check to see whether we already have the information being requested. // CacheState state = dartEntry.getStateInLibrary(descriptor, librarySource); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. Unless the modification date of the // source continues to change, this loop will eventually terminate. // LibraryElement library = computeLibraryElement(librarySource); CompilationUnit unit = resolveCompilationUnit(unitSource, library); if (unit == null) { throw new AnalysisException( "Could not resolve compilation unit ${unitSource.fullName} in ${librarySource.fullName}"); } dartEntry = new GenerateDartErrorsTask(this, unitSource, unit, library) .perform(_resultRecorder) as DartEntry; state = dartEntry.getStateInLibrary(descriptor, librarySource); } return dartEntry; } /** * Given a source for an HTML file, return a cache entry in which all of the * data represented by the state of the given descriptors is either * [CacheState.VALID] or [CacheState.ERROR]. This method assumes that the data * can be produced by parsing the source if it is not already cached. * * Note: This method cannot be used in an async environment. */ HtmlEntry _cacheHtmlParseData( Source source, HtmlEntry htmlEntry, DataDescriptor descriptor) { if (identical(descriptor, HtmlEntry.PARSED_UNIT)) { ht.HtmlUnit unit = htmlEntry.anyParsedUnit; if (unit != null) { return htmlEntry; } } // // Check to see whether we already have the information being requested. // CacheState state = htmlEntry.getState(descriptor); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. Unless the modification date of the // source continues to change, this loop will eventually terminate. // try { if (htmlEntry.getState(SourceEntry.CONTENT) != CacheState.VALID) { htmlEntry = new GetContentTask(this, source) .perform(_resultRecorder) as HtmlEntry; } htmlEntry = new ParseHtmlTask( this, source, htmlEntry.getValue(SourceEntry.CONTENT)) .perform(_resultRecorder) as HtmlEntry; } on AnalysisException catch (exception) { throw exception; } catch (exception, stackTrace) { throw new AnalysisException( "Exception", new CaughtException(exception, stackTrace)); } state = htmlEntry.getState(descriptor); } return htmlEntry; } /** * Given a source for an HTML file, return a cache entry in which the state of * the data represented by the given descriptor is either [CacheState.VALID] * or [CacheState.ERROR]. This method assumes that the data can be produced by * resolving the source if it is not already cached. * * Note: This method cannot be used in an async environment. */ HtmlEntry _cacheHtmlResolutionData( Source source, HtmlEntry htmlEntry, DataDescriptor descriptor) { // // Check to see whether we already have the information being requested. // CacheState state = htmlEntry.getState(descriptor); while (state != CacheState.ERROR && state != CacheState.VALID) { // // If not, compute the information. Unless the modification date of the // source continues to change, this loop will eventually terminate. // htmlEntry = _cacheHtmlParseData(source, htmlEntry, HtmlEntry.PARSED_UNIT); htmlEntry = new ResolveHtmlTask(this, source, htmlEntry.modificationTime, htmlEntry.getValue(HtmlEntry.PARSED_UNIT)) .perform(_resultRecorder) as HtmlEntry; state = htmlEntry.getState(descriptor); } return htmlEntry; } /** * Remove the given [pendingFuture] from [_pendingFutureSources], since the * client has indicated its computation is not needed anymore. */ void _cancelFuture(PendingFuture pendingFuture) { List<PendingFuture> pendingFutures = _pendingFutureSources[pendingFuture.source]; if (pendingFutures != null) { pendingFutures.remove(pendingFuture); if (pendingFutures.isEmpty) { _pendingFutureSources.remove(pendingFuture.source); } } } /** * Compute the transitive closure of all libraries that depend on the given * [library] by adding such libraries to the given collection of * [librariesToInvalidate]. */ void _computeAllLibrariesDependingOn( Source library, HashSet<Source> librariesToInvalidate) { if (librariesToInvalidate.add(library)) { for (Source dependentLibrary in getLibrariesDependingOn(library)) { _computeAllLibrariesDependingOn( dependentLibrary, librariesToInvalidate); } } } /** * Return the priority that should be used when the source associated with * the given [dartEntry] is added to the work manager. */ SourcePriority _computePriority(DartEntry dartEntry) { SourceKind kind = dartEntry.kind; if (kind == SourceKind.LIBRARY) { return SourcePriority.LIBRARY; } else if (kind == SourceKind.PART) { return SourcePriority.NORMAL_PART; } return SourcePriority.UNKNOWN; } /** * Given the encoded form of a source ([encoding]), use the source factory to * reconstitute the original source. */ Source _computeSourceFromEncoding(String encoding) => _sourceFactory.fromEncoding(encoding); /** * Return `true` if the given list of [sources] contains the given * [targetSource]. */ bool _contains(List<Source> sources, Source targetSource) { for (Source source in sources) { if (source == targetSource) { return true; } } return false; } /** * Return `true` if the given list of [sources] contains any of the given * [targetSources]. */ bool _containsAny(List<Source> sources, List<Source> targetSources) { for (Source targetSource in targetSources) { if (_contains(sources, targetSource)) { return true; } } return false; } /** * Set the contents of the given [source] to the given [contents] and mark the * source as having changed. The additional [offset], [oldLength] and * [newLength] information is used by the context to determine what reanalysis * is necessary. The method [setChangedContents] triggers a source changed * event where as this method does not. */ bool _contentRangeChanged(Source source, String contents, int offset, int oldLength, int newLength) { bool changed = false; String originalContents = _contentCache.setContents(source, contents); if (contents != null) { if (contents != originalContents) { if (_options.incremental) { _incrementalAnalysisCache = IncrementalAnalysisCache.update( _incrementalAnalysisCache, source, originalContents, contents, offset, oldLength, newLength, _getReadableSourceEntry(source)); } _sourceChanged(source); changed = true; SourceEntry sourceEntry = _cache.get(source); if (sourceEntry != null) { sourceEntry.modificationTime = _contentCache.getModificationStamp(source); sourceEntry.setValue(SourceEntry.CONTENT, contents); } } } else if (originalContents != null) { _incrementalAnalysisCache = IncrementalAnalysisCache.clear(_incrementalAnalysisCache, source); _sourceChanged(source); changed = true; } return changed; } /** * Set the contents of the given [source] to the given [contents] and mark the * source as having changed. This has the effect of overriding the default * contents of the source. If the contents are `null` the override is removed * so that the default contents will be returned. If [notify] is true, a * source changed event is triggered. */ void _contentsChanged(Source source, String contents, bool notify) { String originalContents = _contentCache.setContents(source, contents); handleContentsChanged(source, originalContents, contents, notify); } /** * Create a [GenerateDartErrorsTask] for the given [unitSource], marking the * verification errors as being in-process. The compilation unit and the * library can be the same if the compilation unit is the defining compilation * unit of the library. */ AnalysisContextImpl_TaskData _createGenerateDartErrorsTask(Source unitSource, DartEntry unitEntry, Source librarySource, DartEntry libraryEntry) { if (unitEntry.getStateInLibrary(DartEntry.RESOLVED_UNIT, librarySource) != CacheState.VALID || libraryEntry.getState(DartEntry.ELEMENT) != CacheState.VALID) { return _createResolveDartLibraryTask(librarySource, libraryEntry); } CompilationUnit unit = unitEntry.getValueInLibrary(DartEntry.RESOLVED_UNIT, librarySource); if (unit == null) { CaughtException exception = new CaughtException(new AnalysisException( "Entry has VALID state for RESOLVED_UNIT but null value for ${unitSource.fullName} in ${librarySource.fullName}"), null); AnalysisEngine.instance.logger.logInformation( exception.toString(), exception); unitEntry.recordResolutionError(exception); return new AnalysisContextImpl_TaskData(null, false); } LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); return new AnalysisContextImpl_TaskData( new GenerateDartErrorsTask(this, unitSource, unit, libraryElement), false); } /** * Create a [GenerateDartHintsTask] for the given [source], marking the hints * as being in-process. */ AnalysisContextImpl_TaskData _createGenerateDartHintsTask(Source source, DartEntry dartEntry, Source librarySource, DartEntry libraryEntry) { if (libraryEntry.getState(DartEntry.ELEMENT) != CacheState.VALID) { return _createResolveDartLibraryTask(librarySource, libraryEntry); } LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); CompilationUnitElement definingUnit = libraryElement.definingCompilationUnit; List<CompilationUnitElement> parts = libraryElement.parts; List<TimestampedData<CompilationUnit>> units = new List<TimestampedData>(parts.length + 1); units[0] = _getResolvedUnit(definingUnit, librarySource); if (units[0] == null) { // TODO(brianwilkerson) We should return a ResolveDartUnitTask // (unless there are multiple ASTs that need to be resolved). return _createResolveDartLibraryTask(librarySource, libraryEntry); } for (int i = 0; i < parts.length; i++) { units[i + 1] = _getResolvedUnit(parts[i], librarySource); if (units[i + 1] == null) { // TODO(brianwilkerson) We should return a ResolveDartUnitTask // (unless there are multiple ASTs that need to be resolved). return _createResolveDartLibraryTask(librarySource, libraryEntry); } } return new AnalysisContextImpl_TaskData( new GenerateDartHintsTask(this, units, libraryElement), false); } /** * Create a [GenerateDartLintsTask] for the given [source], marking the lints * as being in-process. */ AnalysisContextImpl_TaskData _createGenerateDartLintsTask(Source source, DartEntry dartEntry, Source librarySource, DartEntry libraryEntry) { if (libraryEntry.getState(DartEntry.ELEMENT) != CacheState.VALID) { return _createResolveDartLibraryTask(librarySource, libraryEntry); } LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); CompilationUnitElement definingUnit = libraryElement.definingCompilationUnit; List<CompilationUnitElement> parts = libraryElement.parts; List<TimestampedData<CompilationUnit>> units = new List<TimestampedData>(parts.length + 1); units[0] = _getResolvedUnit(definingUnit, librarySource); if (units[0] == null) { // TODO(brianwilkerson) We should return a ResolveDartUnitTask // (unless there are multiple ASTs that need to be resolved). return _createResolveDartLibraryTask(librarySource, libraryEntry); } for (int i = 0; i < parts.length; i++) { units[i + 1] = _getResolvedUnit(parts[i], librarySource); if (units[i + 1] == null) { // TODO(brianwilkerson) We should return a ResolveDartUnitTask // (unless there are multiple ASTs that need to be resolved). return _createResolveDartLibraryTask(librarySource, libraryEntry); } } //TODO(pquitslund): revisit if we need all units or whether one will do return new AnalysisContextImpl_TaskData( new GenerateDartLintsTask(this, units, libraryElement), false); } /** * Create a [GetContentTask] for the given [source], marking the content as * being in-process. */ AnalysisContextImpl_TaskData _createGetContentTask( Source source, SourceEntry sourceEntry) { return new AnalysisContextImpl_TaskData( new GetContentTask(this, source), false); } /** * Create a [ParseDartTask] for the given [source]. */ AnalysisContextImpl_TaskData _createParseDartTask( Source source, DartEntry dartEntry) { if (dartEntry.getState(DartEntry.TOKEN_STREAM) != CacheState.VALID || dartEntry.getState(SourceEntry.LINE_INFO) != CacheState.VALID) { return _createScanDartTask(source, dartEntry); } Token tokenStream = dartEntry.getValue(DartEntry.TOKEN_STREAM); dartEntry.setState(DartEntry.TOKEN_STREAM, CacheState.FLUSHED); return new AnalysisContextImpl_TaskData(new ParseDartTask(this, source, tokenStream, dartEntry.getValue(SourceEntry.LINE_INFO)), false); } /** * Create a [ParseHtmlTask] for the given [source]. */ AnalysisContextImpl_TaskData _createParseHtmlTask( Source source, HtmlEntry htmlEntry) { if (htmlEntry.getState(SourceEntry.CONTENT) != CacheState.VALID) { return _createGetContentTask(source, htmlEntry); } String content = htmlEntry.getValue(SourceEntry.CONTENT); htmlEntry.setState(SourceEntry.CONTENT, CacheState.FLUSHED); return new AnalysisContextImpl_TaskData( new ParseHtmlTask(this, source, content), false); } /** * Create a [ResolveDartLibraryTask] for the given [source], marking ? as * being in-process. */ AnalysisContextImpl_TaskData _createResolveDartLibraryTask( Source source, DartEntry dartEntry) { try { AnalysisContextImpl_CycleBuilder builder = new AnalysisContextImpl_CycleBuilder(this); PerformanceStatistics.cycles.makeCurrentWhile(() { builder.computeCycleContaining(source); }); AnalysisContextImpl_TaskData taskData = builder.taskData; if (taskData != null) { return taskData; } return new AnalysisContextImpl_TaskData(new ResolveDartLibraryCycleTask( this, source, source, builder.librariesInCycle), false); } on AnalysisException catch (exception, stackTrace) { dartEntry .recordResolutionError(new CaughtException(exception, stackTrace)); AnalysisEngine.instance.logger.logError( "Internal error trying to create a ResolveDartLibraryTask", new CaughtException(exception, stackTrace)); } return new AnalysisContextImpl_TaskData(null, false); } /** * Create a [ResolveHtmlTask] for the given [source], marking the resolved * unit as being in-process. */ AnalysisContextImpl_TaskData _createResolveHtmlTask( Source source, HtmlEntry htmlEntry) { if (htmlEntry.getState(HtmlEntry.PARSED_UNIT) != CacheState.VALID) { return _createParseHtmlTask(source, htmlEntry); } return new AnalysisContextImpl_TaskData(new ResolveHtmlTask(this, source, htmlEntry.modificationTime, htmlEntry.getValue(HtmlEntry.PARSED_UNIT)), false); } /** * Create a [ScanDartTask] for the given [source], marking the scan errors as * being in-process. */ AnalysisContextImpl_TaskData _createScanDartTask( Source source, DartEntry dartEntry) { if (dartEntry.getState(SourceEntry.CONTENT) != CacheState.VALID) { return _createGetContentTask(source, dartEntry); } String content = dartEntry.getValue(SourceEntry.CONTENT); dartEntry.setState(SourceEntry.CONTENT, CacheState.FLUSHED); return new AnalysisContextImpl_TaskData( new ScanDartTask(this, source, content), false); } /** * Create a source entry for the given [source]. Return the source entry that * was created, or `null` if the source should not be tracked by this context. */ SourceEntry _createSourceEntry(Source source, bool explicitlyAdded) { String name = source.shortName; if (AnalysisEngine.isHtmlFileName(name)) { HtmlEntry htmlEntry = new HtmlEntry(); htmlEntry.modificationTime = getModificationStamp(source); htmlEntry.explicitlyAdded = explicitlyAdded; _cache.put(source, htmlEntry); return htmlEntry; } else { DartEntry dartEntry = new DartEntry(); dartEntry.modificationTime = getModificationStamp(source); dartEntry.explicitlyAdded = explicitlyAdded; _cache.put(source, dartEntry); return dartEntry; } } /** * Return a list containing all of the change notices that are waiting to be * returned. If there are no notices, then return either `null` or an empty * list, depending on the value of [nullIfEmpty]. */ List<ChangeNotice> _getChangeNotices(bool nullIfEmpty) { if (_pendingNotices.isEmpty) { if (nullIfEmpty) { return null; } return ChangeNoticeImpl.EMPTY_ARRAY; } List<ChangeNotice> notices = new List.from(_pendingNotices.values); _pendingNotices.clear(); return notices; } /** * Given a source for a Dart file and the library that contains it, return the * data represented by the given descriptor that is associated with that * source. This method assumes that the data can be produced by generating * hints for the library if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be resolved. * * Note: This method cannot be used in an async environment. */ Object _getDartHintData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { dartEntry = _cacheDartHintData(unitSource, librarySource, dartEntry, descriptor); if (identical(descriptor, DartEntry.ELEMENT)) { return dartEntry.getValue(descriptor); } return dartEntry.getValueInLibrary(descriptor, librarySource); } /** * Given a source for a Dart file and the library that contains it, return the * data represented by the given descriptor that is associated with that * source. This method assumes that the data can be produced by generating * lints for the library if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be resolved. * * Note: This method cannot be used in an async environment. */ Object _getDartLintData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { dartEntry = _cacheDartLintData(unitSource, librarySource, dartEntry, descriptor); if (identical(descriptor, DartEntry.ELEMENT)) { return dartEntry.getValue(descriptor); } return dartEntry.getValueInLibrary(descriptor, librarySource); } /** * Given a source for a Dart file, return the data represented by the given * descriptor that is associated with that source. This method assumes that * the data can be produced by parsing the source if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be parsed. * * Note: This method cannot be used in an async environment. */ Object _getDartParseData( Source source, DartEntry dartEntry, DataDescriptor descriptor) { dartEntry = _cacheDartParseData(source, dartEntry, descriptor); if (identical(descriptor, DartEntry.PARSED_UNIT)) { _accessedAst(source); return dartEntry.anyParsedCompilationUnit; } return dartEntry.getValue(descriptor); } /** * Given a source for a Dart file, return the data represented by the given * descriptor that is associated with that source, or the given default value * if the source is not a Dart file. This method assumes that the data can be * produced by parsing the source if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be parsed. * * Note: This method cannot be used in an async environment. */ Object _getDartParseData2( Source source, DataDescriptor descriptor, Object defaultValue) { DartEntry dartEntry = _getReadableDartEntry(source); if (dartEntry == null) { return defaultValue; } try { return _getDartParseData(source, dartEntry, descriptor); } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not compute $descriptor", new CaughtException(exception, stackTrace)); return defaultValue; } } /** * Given a source for a Dart file and the library that contains it, return the * data represented by the given descriptor that is associated with that * source. This method assumes that the data can be produced by resolving the * source in the context of the library if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be resolved. * * Note: This method cannot be used in an async environment. */ Object _getDartResolutionData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { dartEntry = _cacheDartResolutionData( unitSource, librarySource, dartEntry, descriptor); if (identical(descriptor, DartEntry.ELEMENT)) { return dartEntry.getValue(descriptor); } else if (identical(descriptor, DartEntry.RESOLVED_UNIT)) { _accessedAst(unitSource); } return dartEntry.getValueInLibrary(descriptor, librarySource); } /** * Given a source for a Dart file and the library that contains it, return the * data represented by the given descriptor that is associated with that * source, or the given default value if the source is not a Dart file. This * method assumes that the data can be produced by resolving the source in the * context of the library if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be resolved. * * Note: This method cannot be used in an async environment. */ Object _getDartResolutionData2(Source unitSource, Source librarySource, DataDescriptor descriptor, Object defaultValue) { DartEntry dartEntry = _getReadableDartEntry(unitSource); if (dartEntry == null) { return defaultValue; } try { return _getDartResolutionData( unitSource, librarySource, dartEntry, descriptor); } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not compute $descriptor", new CaughtException(exception, stackTrace)); return defaultValue; } } /** * Given a source for a Dart file, return the data represented by the given * descriptor that is associated with that source. This method assumes that * the data can be produced by scanning the source if it is not already * cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be scanned. * * Note: This method cannot be used in an async environment. */ Object _getDartScanData( Source source, DartEntry dartEntry, DataDescriptor descriptor) { dartEntry = _cacheDartScanData(source, dartEntry, descriptor); return dartEntry.getValue(descriptor); } /** * Given a source for a Dart file, return the data represented by the given * descriptor that is associated with that source, or the given default value * if the source is not a Dart file. This method assumes that the data can be * produced by scanning the source if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be scanned. * * Note: This method cannot be used in an async environment. */ Object _getDartScanData2( Source source, DataDescriptor descriptor, Object defaultValue) { DartEntry dartEntry = _getReadableDartEntry(source); if (dartEntry == null) { return defaultValue; } try { return _getDartScanData(source, dartEntry, descriptor); } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not compute $descriptor", new CaughtException(exception, stackTrace)); return defaultValue; } } /** * Given a source for a Dart file and the library that contains it, return the * data represented by the given descriptor that is associated with that * source. This method assumes that the data can be produced by verifying the * source within the given library if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be resolved. * * Note: This method cannot be used in an async environment. */ Object _getDartVerificationData(Source unitSource, Source librarySource, DartEntry dartEntry, DataDescriptor descriptor) { dartEntry = _cacheDartVerificationData( unitSource, librarySource, dartEntry, descriptor); return dartEntry.getValueInLibrary(descriptor, librarySource); } /** * Given a source for an HTML file, return the data represented by the given * descriptor that is associated with that source, or the given default value * if the source is not an HTML file. This method assumes that the data can be * produced by parsing the source if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be parsed. * * Note: This method cannot be used in an async environment. */ Object _getHtmlParseData( Source source, DataDescriptor descriptor, Object defaultValue) { HtmlEntry htmlEntry = _getReadableHtmlEntry(source); if (htmlEntry == null) { return defaultValue; } htmlEntry = _cacheHtmlParseData(source, htmlEntry, descriptor); if (identical(descriptor, HtmlEntry.PARSED_UNIT)) { _accessedAst(source); return htmlEntry.anyParsedUnit; } return htmlEntry.getValue(descriptor); } /** * Given a source for an HTML file, return the data represented by the given * descriptor that is associated with that source, or the given default value * if the source is not an HTML file. This method assumes that the data can be * produced by resolving the source if it is not already cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be resolved. * * Note: This method cannot be used in an async environment. */ Object _getHtmlResolutionData( Source source, DataDescriptor descriptor, Object defaultValue) { HtmlEntry htmlEntry = _getReadableHtmlEntry(source); if (htmlEntry == null) { return defaultValue; } try { return _getHtmlResolutionData2(source, htmlEntry, descriptor); } on ObsoleteSourceAnalysisException catch (exception, stackTrace) { AnalysisEngine.instance.logger.logInformation( "Could not compute $descriptor", new CaughtException(exception, stackTrace)); return defaultValue; } } /** * Given a source for an HTML file, return the data represented by the given * descriptor that is associated with that source. This method assumes that * the data can be produced by resolving the source if it is not already * cached. * * Throws an [AnalysisException] if data could not be returned because the * source could not be resolved. * * Note: This method cannot be used in an async environment. */ Object _getHtmlResolutionData2( Source source, HtmlEntry htmlEntry, DataDescriptor descriptor) { htmlEntry = _cacheHtmlResolutionData(source, htmlEntry, descriptor); if (identical(descriptor, HtmlEntry.RESOLVED_UNIT)) { _accessedAst(source); } return htmlEntry.getValue(descriptor); } /** * Look at the given [source] to see whether a task needs to be performed * related to it. Return the task that should be performed, or `null` if there * is no more work to be done for the source. */ AnalysisContextImpl_TaskData _getNextAnalysisTaskForSource(Source source, SourceEntry sourceEntry, bool isPriority, bool hintsEnabled, bool lintsEnabled) { // Refuse to generate tasks for html based files that are above 1500 KB if (_isTooBigHtmlSourceEntry(source, sourceEntry)) { // TODO (jwren) we still need to report an error of some kind back to the // client. return new AnalysisContextImpl_TaskData(null, false); } if (sourceEntry == null) { return new AnalysisContextImpl_TaskData(null, false); } CacheState contentState = sourceEntry.getState(SourceEntry.CONTENT); if (contentState == CacheState.INVALID) { return _createGetContentTask(source, sourceEntry); } else if (contentState == CacheState.IN_PROCESS) { // We are already in the process of getting the content. // There's nothing else we can do with this source until that's complete. return new AnalysisContextImpl_TaskData(null, true); } else if (contentState == CacheState.ERROR) { // We have done all of the analysis we can for this source because we // cannot get its content. return new AnalysisContextImpl_TaskData(null, false); } if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; CacheState scanErrorsState = dartEntry.getState(DartEntry.SCAN_ERRORS); if (scanErrorsState == CacheState.INVALID || (isPriority && scanErrorsState == CacheState.FLUSHED)) { return _createScanDartTask(source, dartEntry); } CacheState parseErrorsState = dartEntry.getState(DartEntry.PARSE_ERRORS); if (parseErrorsState == CacheState.INVALID || (isPriority && parseErrorsState == CacheState.FLUSHED)) { return _createParseDartTask(source, dartEntry); } if (isPriority && parseErrorsState != CacheState.ERROR) { if (!dartEntry.hasResolvableCompilationUnit) { return _createParseDartTask(source, dartEntry); } } SourceKind kind = dartEntry.getValue(DartEntry.SOURCE_KIND); if (kind == SourceKind.UNKNOWN) { return _createParseDartTask(source, dartEntry); } else if (kind == SourceKind.LIBRARY) { CacheState elementState = dartEntry.getState(DartEntry.ELEMENT); if (elementState == CacheState.INVALID) { return _createResolveDartLibraryTask(source, dartEntry); } } List<Source> librariesContaining = dartEntry.containingLibraries; for (Source librarySource in librariesContaining) { SourceEntry librarySourceEntry = _cache.get(librarySource); if (librarySourceEntry is DartEntry) { DartEntry libraryEntry = librarySourceEntry; CacheState elementState = libraryEntry.getState(DartEntry.ELEMENT); if (elementState == CacheState.INVALID || (isPriority && elementState == CacheState.FLUSHED)) { // return createResolveDartLibraryTask(librarySource, (DartEntry) libraryEntry); return new AnalysisContextImpl_TaskData( new ResolveDartLibraryTask(this, source, librarySource), false); } CacheState resolvedUnitState = dartEntry.getStateInLibrary( DartEntry.RESOLVED_UNIT, librarySource); if (resolvedUnitState == CacheState.INVALID || (isPriority && resolvedUnitState == CacheState.FLUSHED)) { // // The commented out lines below are an optimization that doesn't // quite work yet. The problem is that if the source was not // resolved because it wasn't part of any library, then there won't // be any elements in the element model that we can use to resolve // it. // // LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); // if (libraryElement != null) { // return new ResolveDartUnitTask(this, source, libraryElement); // } // Possibly replace with: // return createResolveDartLibraryTask(librarySource, (DartEntry) libraryEntry); return new AnalysisContextImpl_TaskData( new ResolveDartLibraryTask(this, source, librarySource), false); } if (_shouldErrorsBeAnalyzed(source, dartEntry)) { CacheState verificationErrorsState = dartEntry.getStateInLibrary( DartEntry.VERIFICATION_ERRORS, librarySource); if (verificationErrorsState == CacheState.INVALID || (isPriority && verificationErrorsState == CacheState.FLUSHED)) { return _createGenerateDartErrorsTask( source, dartEntry, librarySource, libraryEntry); } if (hintsEnabled) { CacheState hintsState = dartEntry.getStateInLibrary(DartEntry.HINTS, librarySource); if (hintsState == CacheState.INVALID || (isPriority && hintsState == CacheState.FLUSHED)) { return _createGenerateDartHintsTask( source, dartEntry, librarySource, libraryEntry); } } if (lintsEnabled) { CacheState lintsState = dartEntry.getStateInLibrary(DartEntry.LINTS, librarySource); if (lintsState == CacheState.INVALID || (isPriority && lintsState == CacheState.FLUSHED)) { return _createGenerateDartLintsTask( source, dartEntry, librarySource, libraryEntry); } } } } } } else if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; CacheState parseErrorsState = htmlEntry.getState(HtmlEntry.PARSE_ERRORS); if (parseErrorsState == CacheState.INVALID || (isPriority && parseErrorsState == CacheState.FLUSHED)) { return _createParseHtmlTask(source, htmlEntry); } if (isPriority && parseErrorsState != CacheState.ERROR) { ht.HtmlUnit parsedUnit = htmlEntry.anyParsedUnit; if (parsedUnit == null) { return _createParseHtmlTask(source, htmlEntry); } } CacheState resolvedUnitState = htmlEntry.getState(HtmlEntry.RESOLVED_UNIT); if (resolvedUnitState == CacheState.INVALID || (isPriority && resolvedUnitState == CacheState.FLUSHED)) { return _createResolveHtmlTask(source, htmlEntry); } } return new AnalysisContextImpl_TaskData(null, false); } /** * Return a change notice for the given [source], creating one if one does not * already exist. */ ChangeNoticeImpl _getNotice(Source source) { ChangeNoticeImpl notice = _pendingNotices[source]; if (notice == null) { notice = new ChangeNoticeImpl(source); _pendingNotices[source] = notice; } return notice; } /** * Return the cache entry associated with the given [source], or `null` if the * source is not a Dart file. * * @param source the source for which a cache entry is being sought * @return the source cache entry associated with the given source */ DartEntry _getReadableDartEntry(Source source) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry == null) { sourceEntry = _createSourceEntry(source, false); } if (sourceEntry is DartEntry) { return sourceEntry; } return null; } /** * Return the cache entry associated with the given [source], or `null` if the * source is not an HTML file. */ HtmlEntry _getReadableHtmlEntry(Source source) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry == null) { sourceEntry = _createSourceEntry(source, false); } if (sourceEntry is HtmlEntry) { return sourceEntry; } return null; } /** * Return the cache entry associated with the given [source], creating it if * necessary. */ SourceEntry _getReadableSourceEntry(Source source) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry == null) { sourceEntry = _createSourceEntry(source, false); } return sourceEntry; } /** * Return a resolved compilation unit corresponding to the given [element] in * the library defined by the given [librarySource], or `null` if the * information is not cached. */ TimestampedData<CompilationUnit> _getResolvedUnit( CompilationUnitElement element, Source librarySource) { SourceEntry sourceEntry = _cache.get(element.source); if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; if (dartEntry.getStateInLibrary(DartEntry.RESOLVED_UNIT, librarySource) == CacheState.VALID) { return new TimestampedData<CompilationUnit>(dartEntry.modificationTime, dartEntry.getValueInLibrary( DartEntry.RESOLVED_UNIT, librarySource)); } } return null; } /** * Return a list containing all of the sources known to this context that have * the given [kind]. */ List<Source> _getSources(SourceKind kind) { List<Source> sources = new List<Source>(); MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { if (iterator.value.kind == kind) { sources.add(iterator.key); } } return sources; } /** * Look at the given [source] to see whether a task needs to be performed * related to it. If so, add the source to the set of sources that need to be * processed. This method duplicates, and must therefore be kept in sync with, * [_getNextAnalysisTaskForSource]. This method is intended to be used for * testing purposes only. */ void _getSourcesNeedingProcessing(Source source, SourceEntry sourceEntry, bool isPriority, bool hintsEnabled, bool lintsEnabled, HashSet<Source> sources) { if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; CacheState scanErrorsState = dartEntry.getState(DartEntry.SCAN_ERRORS); if (scanErrorsState == CacheState.INVALID || (isPriority && scanErrorsState == CacheState.FLUSHED)) { sources.add(source); return; } CacheState parseErrorsState = dartEntry.getState(DartEntry.PARSE_ERRORS); if (parseErrorsState == CacheState.INVALID || (isPriority && parseErrorsState == CacheState.FLUSHED)) { sources.add(source); return; } if (isPriority) { if (!dartEntry.hasResolvableCompilationUnit) { sources.add(source); return; } } for (Source librarySource in getLibrariesContaining(source)) { SourceEntry libraryEntry = _cache.get(librarySource); if (libraryEntry is DartEntry) { CacheState elementState = libraryEntry.getState(DartEntry.ELEMENT); if (elementState == CacheState.INVALID || (isPriority && elementState == CacheState.FLUSHED)) { sources.add(source); return; } CacheState resolvedUnitState = dartEntry.getStateInLibrary( DartEntry.RESOLVED_UNIT, librarySource); if (resolvedUnitState == CacheState.INVALID || (isPriority && resolvedUnitState == CacheState.FLUSHED)) { LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); if (libraryElement != null) { sources.add(source); return; } } if (_shouldErrorsBeAnalyzed(source, dartEntry)) { CacheState verificationErrorsState = dartEntry.getStateInLibrary( DartEntry.VERIFICATION_ERRORS, librarySource); if (verificationErrorsState == CacheState.INVALID || (isPriority && verificationErrorsState == CacheState.FLUSHED)) { LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); if (libraryElement != null) { sources.add(source); return; } } if (hintsEnabled) { CacheState hintsState = dartEntry.getStateInLibrary(DartEntry.HINTS, librarySource); if (hintsState == CacheState.INVALID || (isPriority && hintsState == CacheState.FLUSHED)) { LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); if (libraryElement != null) { sources.add(source); return; } } } if (lintsEnabled) { CacheState lintsState = dartEntry.getStateInLibrary(DartEntry.LINTS, librarySource); if (lintsState == CacheState.INVALID || (isPriority && lintsState == CacheState.FLUSHED)) { LibraryElement libraryElement = libraryEntry.getValue(DartEntry.ELEMENT); if (libraryElement != null) { sources.add(source); return; } } } } } } } else if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; CacheState parsedUnitState = htmlEntry.getState(HtmlEntry.PARSED_UNIT); if (parsedUnitState == CacheState.INVALID || (isPriority && parsedUnitState == CacheState.FLUSHED)) { sources.add(source); return; } CacheState resolvedUnitState = htmlEntry.getState(HtmlEntry.RESOLVED_UNIT); if (resolvedUnitState == CacheState.INVALID || (isPriority && resolvedUnitState == CacheState.FLUSHED)) { sources.add(source); return; } } } /** * Invalidate all of the resolution results computed by this context. The flag * [invalidateUris] should be `true` if the cached results of converting URIs * to source files should also be invalidated. */ void _invalidateAllLocalResolutionInformation(bool invalidateUris) { HashMap<Source, List<Source>> oldPartMap = new HashMap<Source, List<Source>>(); MapIterator<Source, SourceEntry> iterator = _privatePartition.iterator(); while (iterator.moveNext()) { Source source = iterator.key; SourceEntry sourceEntry = iterator.value; if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; htmlEntry.invalidateAllResolutionInformation(invalidateUris); iterator.value = htmlEntry; _workManager.add(source, SourcePriority.HTML); } else if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; oldPartMap[source] = dartEntry.getValue(DartEntry.INCLUDED_PARTS); dartEntry.invalidateAllResolutionInformation(invalidateUris); iterator.value = dartEntry; _workManager.add(source, _computePriority(dartEntry)); } } _removeFromPartsUsingMap(oldPartMap); } /** * In response to a change to at least one of the compilation units in the * library defined by the given [librarySource], invalidate any results that * are dependent on the result of resolving that library. * * Note: Any cache entries that were accessed before this method was * invoked must be re-accessed after this method returns. */ void _invalidateLibraryResolution(Source librarySource) { // TODO(brianwilkerson) This could be optimized. There's no need to flush // all of these entries if the public namespace hasn't changed, which will // be a fairly common case. The question is whether we can afford the time // to compute the namespace to look for differences. DartEntry libraryEntry = _getReadableDartEntry(librarySource); if (libraryEntry != null) { List<Source> includedParts = libraryEntry.getValue(DartEntry.INCLUDED_PARTS); libraryEntry.invalidateAllResolutionInformation(false); _workManager.add(librarySource, SourcePriority.LIBRARY); for (Source partSource in includedParts) { SourceEntry partEntry = _cache.get(partSource); if (partEntry is DartEntry) { partEntry.invalidateAllResolutionInformation(false); } } } } /** * Return `true` if the given [library] is, or depends on, 'dart:html'. The * [visitedLibraries] is a collection of the libraries that have been visited, * used to prevent infinite recursion. */ bool _isClient(LibraryElement library, Source htmlSource, HashSet<LibraryElement> visitedLibraries) { if (visitedLibraries.contains(library)) { return false; } if (library.source == htmlSource) { return true; } visitedLibraries.add(library); for (LibraryElement imported in library.importedLibraries) { if (_isClient(imported, htmlSource, visitedLibraries)) { return true; } } for (LibraryElement exported in library.exportedLibraries) { if (_isClient(exported, htmlSource, visitedLibraries)) { return true; } } return false; } bool _isTooBigHtmlSourceEntry(Source source, SourceEntry sourceEntry) => false; /** * Log the given debugging [message]. */ void _logInformation(String message) { AnalysisEngine.instance.logger.logInformation(message); } /** * Notify all of the analysis listeners that a task is about to be performed. */ void _notifyAboutToPerformTask(String taskDescription) { int count = _listeners.length; for (int i = 0; i < count; i++) { _listeners[i].aboutToPerformTask(this, taskDescription); } } /** * Notify all of the analysis listeners that the errors associated with the * given [source] has been updated to the given [errors]. */ void _notifyErrors( Source source, List<AnalysisError> errors, LineInfo lineInfo) { int count = _listeners.length; for (int i = 0; i < count; i++) { _listeners[i].computedErrors(this, source, errors, lineInfo); } } /** * Given that the given [source] (with the corresponding [sourceEntry]) has * been invalidated, invalidate all of the libraries that depend on it. */ void _propagateInvalidation(Source source, SourceEntry sourceEntry) { if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; htmlEntry.modificationTime = getModificationStamp(source); htmlEntry.invalidateAllInformation(); _cache.removedAst(source); _workManager.add(source, SourcePriority.HTML); } else if (sourceEntry is DartEntry) { List<Source> containingLibraries = getLibrariesContaining(source); List<Source> dependentLibraries = getLibrariesDependingOn(source); HashSet<Source> librariesToInvalidate = new HashSet<Source>(); for (Source containingLibrary in containingLibraries) { _computeAllLibrariesDependingOn( containingLibrary, librariesToInvalidate); } for (Source dependentLibrary in dependentLibraries) { _computeAllLibrariesDependingOn( dependentLibrary, librariesToInvalidate); } for (Source library in librariesToInvalidate) { _invalidateLibraryResolution(library); } DartEntry dartEntry = _cache.get(source); _removeFromParts(source, dartEntry); dartEntry.modificationTime = getModificationStamp(source); dartEntry.invalidateAllInformation(); _cache.removedAst(source); _workManager.add(source, SourcePriority.UNKNOWN); } // reset unit in the notification, it is out of date now ChangeNoticeImpl notice = _pendingNotices[source]; if (notice != null) { notice.resolvedDartUnit = null; notice.resolvedHtmlUnit = null; } } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordBuildUnitElementTask(BuildUnitElementTask task) { Source source = task.source; Source library = task.library; DartEntry dartEntry = _cache.get(source); CaughtException thrownException = task.exception; if (thrownException != null) { dartEntry.recordBuildElementErrorInLibrary(library, thrownException); throw new AnalysisException('<rethrow>', thrownException); } dartEntry.setValueInLibrary(DartEntry.BUILT_UNIT, library, task.unit); dartEntry.setValueInLibrary( DartEntry.BUILT_ELEMENT, library, task.unitElement); ChangeNoticeImpl notice = _getNotice(source); LineInfo lineInfo = dartEntry.getValue(SourceEntry.LINE_INFO); notice.setErrors(dartEntry.allErrors, lineInfo); return dartEntry; } // /** // * Notify all of the analysis listeners that the given source is no longer included in the set of // * sources that are being analyzed. // * // * @param source the source that is no longer being analyzed // */ // void _notifyExcludedSource(Source source) { // int count = _listeners.length; // for (int i = 0; i < count; i++) { // _listeners[i].excludedSource(this, source); // } // } // /** // * Notify all of the analysis listeners that the given source is now included in the set of // * sources that are being analyzed. // * // * @param source the source that is now being analyzed // */ // void _notifyIncludedSource(Source source) { // int count = _listeners.length; // for (int i = 0; i < count; i++) { // _listeners[i].includedSource(this, source); // } // } // /** // * Notify all of the analysis listeners that the given Dart source was parsed. // * // * @param source the source that was parsed // * @param unit the result of parsing the source // */ // void _notifyParsedDart(Source source, CompilationUnit unit) { // int count = _listeners.length; // for (int i = 0; i < count; i++) { // _listeners[i].parsedDart(this, source, unit); // } // } // /** // * Notify all of the analysis listeners that the given HTML source was parsed. // * // * @param source the source that was parsed // * @param unit the result of parsing the source // */ // void _notifyParsedHtml(Source source, ht.HtmlUnit unit) { // int count = _listeners.length; // for (int i = 0; i < count; i++) { // _listeners[i].parsedHtml(this, source, unit); // } // } // /** // * Notify all of the analysis listeners that the given Dart source was resolved. // * // * @param source the source that was resolved // * @param unit the result of resolving the source // */ // void _notifyResolvedDart(Source source, CompilationUnit unit) { // int count = _listeners.length; // for (int i = 0; i < count; i++) { // _listeners[i].resolvedDart(this, source, unit); // } // } // /** // * Notify all of the analysis listeners that the given HTML source was resolved. // * // * @param source the source that was resolved // * @param unit the result of resolving the source // */ // void _notifyResolvedHtml(Source source, ht.HtmlUnit unit) { // int count = _listeners.length; // for (int i = 0; i < count; i++) { // _listeners[i].resolvedHtml(this, source, unit); // } // } /** * Given a [dartEntry] and a [library] element, record the library element and * other information gleaned from the element in the cache entry. */ void _recordElementData(DartEntry dartEntry, LibraryElement library, Source librarySource, Source htmlSource) { dartEntry.setValue(DartEntry.ELEMENT, library); dartEntry.setValue(DartEntry.IS_LAUNCHABLE, library.entryPoint != null); dartEntry.setValue(DartEntry.IS_CLIENT, _isClient(library, htmlSource, new HashSet<LibraryElement>())); } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordGenerateDartErrorsTask(GenerateDartErrorsTask task) { Source source = task.source; DartEntry dartEntry = _cache.get(source); Source librarySource = task.libraryElement.source; CaughtException thrownException = task.exception; if (thrownException != null) { dartEntry.recordVerificationErrorInLibrary( librarySource, thrownException); throw new AnalysisException('<rethrow>', thrownException); } dartEntry.setValueInLibrary( DartEntry.VERIFICATION_ERRORS, librarySource, task.errors); ChangeNoticeImpl notice = _getNotice(source); LineInfo lineInfo = dartEntry.getValue(SourceEntry.LINE_INFO); notice.setErrors(dartEntry.allErrors, lineInfo); return dartEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordGenerateDartHintsTask(GenerateDartHintsTask task) { Source librarySource = task.libraryElement.source; CaughtException thrownException = task.exception; DartEntry libraryEntry = null; HashMap<Source, List<AnalysisError>> hintMap = task.hintMap; if (hintMap == null) { // We don't have any information about which sources to mark as invalid // other than the library source. DartEntry libraryEntry = _cache.get(librarySource); if (thrownException == null) { String message = "GenerateDartHintsTask returned a null hint map " "without throwing an exception: ${librarySource.fullName}"; thrownException = new CaughtException(new AnalysisException(message), null); } libraryEntry.recordHintErrorInLibrary(librarySource, thrownException); throw new AnalysisException('<rethrow>', thrownException); } hintMap.forEach((Source unitSource, List<AnalysisError> hints) { DartEntry dartEntry = _cache.get(unitSource); if (unitSource == librarySource) { libraryEntry = dartEntry; } if (thrownException == null) { dartEntry.setValueInLibrary(DartEntry.HINTS, librarySource, hints); ChangeNoticeImpl notice = _getNotice(unitSource); LineInfo lineInfo = dartEntry.getValue(SourceEntry.LINE_INFO); notice.setErrors(dartEntry.allErrors, lineInfo); } else { dartEntry.recordHintErrorInLibrary(librarySource, thrownException); } }); if (thrownException != null) { throw new AnalysisException('<rethrow>', thrownException); } return libraryEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordGenerateDartLintsTask(GenerateDartLintsTask task) { Source librarySource = task.libraryElement.source; CaughtException thrownException = task.exception; DartEntry libraryEntry = null; HashMap<Source, List<AnalysisError>> lintMap = task.lintMap; if (lintMap == null) { // We don't have any information about which sources to mark as invalid // other than the library source. DartEntry libraryEntry = _cache.get(librarySource); if (thrownException == null) { String message = "GenerateDartLintsTask returned a null lint map " "without throwing an exception: ${librarySource.fullName}"; thrownException = new CaughtException(new AnalysisException(message), null); } libraryEntry.recordLintErrorInLibrary(librarySource, thrownException); throw new AnalysisException('<rethrow>', thrownException); } lintMap.forEach((Source unitSource, List<AnalysisError> lints) { DartEntry dartEntry = _cache.get(unitSource); if (unitSource == librarySource) { libraryEntry = dartEntry; } if (thrownException == null) { dartEntry.setValueInLibrary(DartEntry.LINTS, librarySource, lints); ChangeNoticeImpl notice = _getNotice(unitSource); LineInfo lineInfo = dartEntry.getValue(SourceEntry.LINE_INFO); notice.setErrors(dartEntry.allErrors, lineInfo); } else { dartEntry.recordLintErrorInLibrary(librarySource, thrownException); } }); if (thrownException != null) { throw new AnalysisException('<rethrow>', thrownException); } return libraryEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ SourceEntry _recordGetContentsTask(GetContentTask task) { if (!task.isComplete) { return null; } Source source = task.source; SourceEntry sourceEntry = _cache.get(source); CaughtException thrownException = task.exception; if (thrownException != null) { sourceEntry.recordContentError(thrownException); { sourceEntry.setValue(SourceEntry.CONTENT_ERRORS, task.errors); ChangeNoticeImpl notice = _getNotice(source); notice.setErrors(sourceEntry.allErrors, null); } _workManager.remove(source); throw new AnalysisException('<rethrow>', thrownException); } sourceEntry.modificationTime = task.modificationTime; sourceEntry.setValue(SourceEntry.CONTENT, task.content); return sourceEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordIncrementalAnalysisTaskResults( IncrementalAnalysisTask task) { CompilationUnit unit = task.compilationUnit; if (unit != null) { ChangeNoticeImpl notice = _getNotice(task.source); notice.resolvedDartUnit = unit; _incrementalAnalysisCache = IncrementalAnalysisCache.cacheResult(task.cache, unit); } return null; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordParseDartTaskResults(ParseDartTask task) { Source source = task.source; DartEntry dartEntry = _cache.get(source); _removeFromParts(source, dartEntry); CaughtException thrownException = task.exception; if (thrownException != null) { _removeFromParts(source, dartEntry); dartEntry.recordParseError(thrownException); _cache.removedAst(source); throw new AnalysisException('<rethrow>', thrownException); } if (task.hasNonPartOfDirective) { dartEntry.setValue(DartEntry.SOURCE_KIND, SourceKind.LIBRARY); dartEntry.containingLibrary = source; _workManager.add(source, SourcePriority.LIBRARY); } else if (task.hasPartOfDirective) { dartEntry.setValue(DartEntry.SOURCE_KIND, SourceKind.PART); dartEntry.removeContainingLibrary(source); _workManager.add(source, SourcePriority.NORMAL_PART); } else { // The file contains no directives. List<Source> containingLibraries = dartEntry.containingLibraries; if (containingLibraries.length > 1 || (containingLibraries.length == 1 && containingLibraries[0] != source)) { dartEntry.setValue(DartEntry.SOURCE_KIND, SourceKind.PART); dartEntry.removeContainingLibrary(source); _workManager.add(source, SourcePriority.NORMAL_PART); } else { dartEntry.setValue(DartEntry.SOURCE_KIND, SourceKind.LIBRARY); dartEntry.containingLibrary = source; _workManager.add(source, SourcePriority.LIBRARY); } } List<Source> newParts = task.includedSources; for (int i = 0; i < newParts.length; i++) { Source partSource = newParts[i]; DartEntry partEntry = _getReadableDartEntry(partSource); if (partEntry != null && !identical(partEntry, dartEntry)) { // TODO(brianwilkerson) Change the kind of the "part" if it was marked // as a library and it has no directives. partEntry.addContainingLibrary(source); } } dartEntry.setValue(DartEntry.PARSED_UNIT, task.compilationUnit); dartEntry.setValue(DartEntry.PARSE_ERRORS, task.errors); dartEntry.setValue(DartEntry.EXPORTED_LIBRARIES, task.exportedSources); dartEntry.setValue(DartEntry.IMPORTED_LIBRARIES, task.importedSources); dartEntry.setValue(DartEntry.INCLUDED_PARTS, newParts); _cache.storedAst(source); ChangeNoticeImpl notice = _getNotice(source); if (notice.resolvedDartUnit == null) { notice.parsedDartUnit = task.compilationUnit; } notice.setErrors(dartEntry.allErrors, task.lineInfo); // Verify that the incrementally parsed and resolved unit in the incremental // cache is structurally equivalent to the fully parsed unit _incrementalAnalysisCache = IncrementalAnalysisCache.verifyStructure( _incrementalAnalysisCache, source, task.compilationUnit); return dartEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ HtmlEntry _recordParseHtmlTaskResults(ParseHtmlTask task) { Source source = task.source; HtmlEntry htmlEntry = _cache.get(source); CaughtException thrownException = task.exception; if (thrownException != null) { htmlEntry.recordParseError(thrownException); _cache.removedAst(source); throw new AnalysisException('<rethrow>', thrownException); } LineInfo lineInfo = task.lineInfo; htmlEntry.setValue(SourceEntry.LINE_INFO, lineInfo); htmlEntry.setValue(HtmlEntry.PARSED_UNIT, task.htmlUnit); htmlEntry.setValue(HtmlEntry.PARSE_ERRORS, task.errors); htmlEntry.setValue( HtmlEntry.REFERENCED_LIBRARIES, task.referencedLibraries); _cache.storedAst(source); ChangeNoticeImpl notice = _getNotice(source); notice.setErrors(htmlEntry.allErrors, lineInfo); return htmlEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordResolveDartUnitTaskResults(ResolveDartUnitTask task) { Source unitSource = task.source; DartEntry dartEntry = _cache.get(unitSource); Source librarySource = task.librarySource; CaughtException thrownException = task.exception; if (thrownException != null) { dartEntry.recordResolutionErrorInLibrary(librarySource, thrownException); _cache.removedAst(unitSource); throw new AnalysisException('<rethrow>', thrownException); } dartEntry.setValueInLibrary( DartEntry.RESOLVED_UNIT, librarySource, task.resolvedUnit); _cache.storedAst(unitSource); return dartEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ HtmlEntry _recordResolveHtmlTaskResults(ResolveHtmlTask task) { Source source = task.source; HtmlEntry htmlEntry = _cache.get(source); CaughtException thrownException = task.exception; if (thrownException != null) { htmlEntry.recordResolutionError(thrownException); _cache.removedAst(source); throw new AnalysisException('<rethrow>', thrownException); } htmlEntry.setState(HtmlEntry.PARSED_UNIT, CacheState.FLUSHED); htmlEntry.setValue(HtmlEntry.RESOLVED_UNIT, task.resolvedUnit); htmlEntry.setValue(HtmlEntry.ELEMENT, task.element); htmlEntry.setValue(HtmlEntry.RESOLUTION_ERRORS, task.resolutionErrors); _cache.storedAst(source); ChangeNoticeImpl notice = _getNotice(source); notice.resolvedHtmlUnit = task.resolvedUnit; LineInfo lineInfo = htmlEntry.getValue(SourceEntry.LINE_INFO); notice.setErrors(htmlEntry.allErrors, lineInfo); return htmlEntry; } /** * Record the results produced by performing a [task] and return the cache * entry associated with the results. */ DartEntry _recordScanDartTaskResults(ScanDartTask task) { Source source = task.source; DartEntry dartEntry = _cache.get(source); CaughtException thrownException = task.exception; if (thrownException != null) { _removeFromParts(source, dartEntry); dartEntry.recordScanError(thrownException); _cache.removedAst(source); throw new AnalysisException('<rethrow>', thrownException); } LineInfo lineInfo = task.lineInfo; dartEntry.setValue(SourceEntry.LINE_INFO, lineInfo); dartEntry.setValue(DartEntry.TOKEN_STREAM, task.tokenStream); dartEntry.setValue(DartEntry.SCAN_ERRORS, task.errors); _cache.storedAst(source); ChangeNoticeImpl notice = _getNotice(source); notice.setErrors(dartEntry.allErrors, lineInfo); return dartEntry; } /** * Remove the given [librarySource] from the list of containing libraries for * all of the parts referenced by the given [dartEntry]. */ void _removeFromParts(Source librarySource, DartEntry dartEntry) { List<Source> oldParts = dartEntry.getValue(DartEntry.INCLUDED_PARTS); for (int i = 0; i < oldParts.length; i++) { Source partSource = oldParts[i]; DartEntry partEntry = _getReadableDartEntry(partSource); if (partEntry != null && !identical(partEntry, dartEntry)) { partEntry.removeContainingLibrary(librarySource); if (partEntry.containingLibraries.length == 0 && !exists(partSource)) { _cache.remove(partSource); } } } } /** * Remove the given libraries that are keys in the given map from the list of * containing libraries for each of the parts in the corresponding value. */ void _removeFromPartsUsingMap(HashMap<Source, List<Source>> oldPartMap) { oldPartMap.forEach((Source librarySource, List<Source> oldParts) { for (int i = 0; i < oldParts.length; i++) { Source partSource = oldParts[i]; if (partSource != librarySource) { DartEntry partEntry = _getReadableDartEntry(partSource); if (partEntry != null) { partEntry.removeContainingLibrary(librarySource); if (partEntry.containingLibraries.length == 0 && !exists(partSource)) { _cache.remove(partSource); } } } } }); } /** * Remove the given [source] from the priority order if it is in the list. */ void _removeFromPriorityOrder(Source source) { int count = _priorityOrder.length; List<Source> newOrder = new List<Source>(); for (int i = 0; i < count; i++) { if (_priorityOrder[i] != source) { newOrder.add(_priorityOrder[i]); } } if (newOrder.length < count) { analysisPriorityOrder = newOrder; } } /** * Return `true` if errors should be produced for the given [source]. The * [dartEntry] associated with the source is passed in for efficiency. */ bool _shouldErrorsBeAnalyzed(Source source, DartEntry dartEntry) { if (source.isInSystemLibrary) { return _generateSdkErrors; } else if (!dartEntry.explicitlyAdded) { return _generateImplicitErrors; } else { return true; } } /** * Create an entry for the newly added [source] and invalidate any sources * that referenced the source before it existed. */ void _sourceAvailable(Source source) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry == null) { sourceEntry = _createSourceEntry(source, true); } else { _propagateInvalidation(source, sourceEntry); sourceEntry = _cache.get(source); } if (sourceEntry is HtmlEntry) { _workManager.add(source, SourcePriority.HTML); } else if (sourceEntry is DartEntry) { _workManager.add(source, _computePriority(sourceEntry)); } } /** * Invalidate the [source] that was changed and any sources that referenced * the source before it existed. */ void _sourceChanged(Source source) { SourceEntry sourceEntry = _cache.get(source); // If the source is removed, we don't care about it. if (sourceEntry == null) { return; } // Check if the content of the source is the same as it was the last time. String sourceContent = sourceEntry.getValue(SourceEntry.CONTENT); if (sourceContent != null) { sourceEntry.setState(SourceEntry.CONTENT, CacheState.FLUSHED); try { TimestampedData<String> fileContents = getContents(source); if (fileContents.data == sourceContent) { return; } } catch (e) {} } // We have to invalidate the cache. _propagateInvalidation(source, sourceEntry); } /** * Record that the give [source] has been deleted. */ void _sourceDeleted(Source source) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; htmlEntry.recordContentError(new CaughtException( new AnalysisException("This source was marked as being deleted"), null)); } else if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; HashSet<Source> libraries = new HashSet<Source>(); for (Source librarySource in getLibrariesContaining(source)) { libraries.add(librarySource); for (Source dependentLibrary in getLibrariesDependingOn(librarySource)) { libraries.add(dependentLibrary); } } for (Source librarySource in libraries) { _invalidateLibraryResolution(librarySource); } dartEntry.recordContentError(new CaughtException( new AnalysisException("This source was marked as being deleted"), null)); } _workManager.remove(source); _removeFromPriorityOrder(source); } /** * Record that the given [source] has been removed. */ void _sourceRemoved(Source source) { SourceEntry sourceEntry = _cache.get(source); if (sourceEntry is HtmlEntry) {} else if (sourceEntry is DartEntry) { HashSet<Source> libraries = new HashSet<Source>(); for (Source librarySource in getLibrariesContaining(source)) { libraries.add(librarySource); for (Source dependentLibrary in getLibrariesDependingOn(librarySource)) { libraries.add(dependentLibrary); } } for (Source librarySource in libraries) { _invalidateLibraryResolution(librarySource); } } _cache.remove(source); _workManager.remove(source); _removeFromPriorityOrder(source); } /** * TODO(scheglov) A hackish, limited incremental resolution implementation. */ bool _tryPoorMansIncrementalResolution(Source unitSource, String newCode) { return PerformanceStatistics.incrementalAnalysis.makeCurrentWhile(() { incrementalResolutionValidation_lastUnitSource = null; incrementalResolutionValidation_lastLibrarySource = null; incrementalResolutionValidation_lastUnit = null; // prepare the entry DartEntry dartEntry = _cache.get(unitSource); if (dartEntry == null) { return false; } // prepare the (only) library source List<Source> librarySources = getLibrariesContaining(unitSource); if (librarySources.length != 1) { return false; } Source librarySource = librarySources[0]; // prepare the library element LibraryElement libraryElement = getLibraryElement(librarySource); if (libraryElement == null) { return false; } // prepare the existing unit CompilationUnit oldUnit = getResolvedCompilationUnit2(unitSource, librarySource); if (oldUnit == null) { return false; } // do resolution Stopwatch perfCounter = new Stopwatch()..start(); PoorMansIncrementalResolver resolver = new PoorMansIncrementalResolver( typeProvider, unitSource, dartEntry, oldUnit, analysisOptions.incrementalApi, analysisOptions); bool success = resolver.resolve(newCode); AnalysisEngine.instance.instrumentationService.logPerformance( AnalysisPerformanceKind.INCREMENTAL, perfCounter, 'success=$success,context_id=$_id,code_length=${newCode.length}'); if (!success) { return false; } // if validation, remember the result, but throw it away if (analysisOptions.incrementalValidation) { incrementalResolutionValidation_lastUnitSource = oldUnit.element.source; incrementalResolutionValidation_lastLibrarySource = oldUnit.element.library.source; incrementalResolutionValidation_lastUnit = oldUnit; return false; } // prepare notice { LineInfo lineInfo = getLineInfo(unitSource); ChangeNoticeImpl notice = _getNotice(unitSource); notice.resolvedDartUnit = oldUnit; notice.setErrors(dartEntry.allErrors, lineInfo); } // OK return true; }); } /** * Check the cache for any invalid entries (entries whose modification time * does not match the modification time of the source associated with the * entry). Invalid entries will be marked as invalid so that the source will * be re-analyzed. Return `true` if at least one entry was invalid. */ bool _validateCacheConsistency() { int consistencyCheckStart = JavaSystem.nanoTime(); List<Source> changedSources = new List<Source>(); List<Source> missingSources = new List<Source>(); MapIterator<Source, SourceEntry> iterator = _cache.iterator(); while (iterator.moveNext()) { Source source = iterator.key; SourceEntry sourceEntry = iterator.value; int sourceTime = getModificationStamp(source); if (sourceTime != sourceEntry.modificationTime) { changedSources.add(source); } if (sourceEntry.exception != null) { if (!exists(source)) { missingSources.add(source); } } } int count = changedSources.length; for (int i = 0; i < count; i++) { _sourceChanged(changedSources[i]); } int removalCount = 0; for (Source source in missingSources) { if (getLibrariesContaining(source).isEmpty && getLibrariesDependingOn(source).isEmpty) { _cache.remove(source); removalCount++; } } int consistencyCheckEnd = JavaSystem.nanoTime(); if (changedSources.length > 0 || missingSources.length > 0) { StringBuffer buffer = new StringBuffer(); buffer.write("Consistency check took "); buffer.write((consistencyCheckEnd - consistencyCheckStart) / 1000000.0); buffer.writeln(" ms and found"); buffer.write(" "); buffer.write(changedSources.length); buffer.writeln(" inconsistent entries"); buffer.write(" "); buffer.write(missingSources.length); buffer.write(" missing sources ("); buffer.write(removalCount); buffer.writeln(" removed"); for (Source source in missingSources) { buffer.write(" "); buffer.writeln(source.fullName); } _logInformation(buffer.toString()); } return changedSources.length > 0; } void _validateLastIncrementalResolutionResult() { if (incrementalResolutionValidation_lastUnitSource == null || incrementalResolutionValidation_lastLibrarySource == null || incrementalResolutionValidation_lastUnit == null) { return; } CompilationUnit fullUnit = getResolvedCompilationUnit2( incrementalResolutionValidation_lastUnitSource, incrementalResolutionValidation_lastLibrarySource); if (fullUnit != null) { try { assertSameResolution( incrementalResolutionValidation_lastUnit, fullUnit); } on IncrementalResolutionMismatch catch (mismatch, stack) { String failure = mismatch.message; String message = 'Incremental resolution mismatch:\n$failure\nat\n$stack'; AnalysisEngine.instance.logger.logError(message); } } incrementalResolutionValidation_lastUnitSource = null; incrementalResolutionValidation_lastLibrarySource = null; incrementalResolutionValidation_lastUnit = null; } } /** * An object used by an analysis context to record the results of a task. */ class AnalysisContextImpl_AnalysisTaskResultRecorder implements AnalysisTaskVisitor<SourceEntry> { final AnalysisContextImpl AnalysisContextImpl_this; AnalysisContextImpl_AnalysisTaskResultRecorder(this.AnalysisContextImpl_this); @override DartEntry visitBuildUnitElementTask(BuildUnitElementTask task) => AnalysisContextImpl_this._recordBuildUnitElementTask(task); @override DartEntry visitGenerateDartErrorsTask(GenerateDartErrorsTask task) => AnalysisContextImpl_this._recordGenerateDartErrorsTask(task); @override DartEntry visitGenerateDartHintsTask(GenerateDartHintsTask task) => AnalysisContextImpl_this._recordGenerateDartHintsTask(task); @override DartEntry visitGenerateDartLintsTask(GenerateDartLintsTask task) => AnalysisContextImpl_this._recordGenerateDartLintsTask(task); @override SourceEntry visitGetContentTask(GetContentTask task) => AnalysisContextImpl_this._recordGetContentsTask(task); @override DartEntry visitIncrementalAnalysisTask(IncrementalAnalysisTask task) => AnalysisContextImpl_this._recordIncrementalAnalysisTaskResults(task); @override DartEntry visitParseDartTask(ParseDartTask task) => AnalysisContextImpl_this._recordParseDartTaskResults(task); @override HtmlEntry visitParseHtmlTask(ParseHtmlTask task) => AnalysisContextImpl_this._recordParseHtmlTaskResults(task); @override DartEntry visitResolveDartLibraryCycleTask( ResolveDartLibraryCycleTask task) => AnalysisContextImpl_this.recordResolveDartLibraryCycleTaskResults(task); @override DartEntry visitResolveDartLibraryTask(ResolveDartLibraryTask task) => AnalysisContextImpl_this.recordResolveDartLibraryTaskResults(task); @override DartEntry visitResolveDartUnitTask(ResolveDartUnitTask task) => AnalysisContextImpl_this._recordResolveDartUnitTaskResults(task); @override HtmlEntry visitResolveHtmlTask(ResolveHtmlTask task) => AnalysisContextImpl_this._recordResolveHtmlTaskResults(task); @override DartEntry visitScanDartTask(ScanDartTask task) => AnalysisContextImpl_this._recordScanDartTaskResults(task); } class AnalysisContextImpl_ContextRetentionPolicy implements CacheRetentionPolicy { final AnalysisContextImpl AnalysisContextImpl_this; AnalysisContextImpl_ContextRetentionPolicy(this.AnalysisContextImpl_this); @override RetentionPriority getAstPriority(Source source, SourceEntry sourceEntry) { int priorityCount = AnalysisContextImpl_this._priorityOrder.length; for (int i = 0; i < priorityCount; i++) { if (source == AnalysisContextImpl_this._priorityOrder[i]) { return RetentionPriority.HIGH; } } if (AnalysisContextImpl_this._neededForResolution != null && AnalysisContextImpl_this._neededForResolution.contains(source)) { return RetentionPriority.HIGH; } if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; if (_astIsNeeded(dartEntry)) { return RetentionPriority.MEDIUM; } } return RetentionPriority.LOW; } bool _astIsNeeded(DartEntry dartEntry) => dartEntry.hasInvalidData(DartEntry.HINTS) || dartEntry.hasInvalidData(DartEntry.LINTS) || dartEntry.hasInvalidData(DartEntry.VERIFICATION_ERRORS) || dartEntry.hasInvalidData(DartEntry.RESOLUTION_ERRORS); } /** * An object used to construct a list of the libraries that must be resolved * together in order to resolve any one of the libraries. */ class AnalysisContextImpl_CycleBuilder { final AnalysisContextImpl AnalysisContextImpl_this; /** * A table mapping the sources of the defining compilation units of libraries * to the representation of the library that has the information needed to * resolve the library. */ HashMap<Source, ResolvableLibrary> _libraryMap = new HashMap<Source, ResolvableLibrary>(); /** * The dependency graph used to compute the libraries in the cycle. */ DirectedGraph<ResolvableLibrary> _dependencyGraph; /** * A list containing the libraries that are ready to be resolved. */ List<ResolvableLibrary> _librariesInCycle; /** * The analysis task that needs to be performed before the cycle of libraries * can be resolved, or `null` if the libraries are ready to be resolved. */ AnalysisContextImpl_TaskData _taskData; /** * Initialize a newly created cycle builder. */ AnalysisContextImpl_CycleBuilder(this.AnalysisContextImpl_this) : super(); /** * Return a list containing the libraries that are ready to be resolved * (assuming that [getTaskData] returns `null`). */ List<ResolvableLibrary> get librariesInCycle => _librariesInCycle; /** * Return a representation of an analysis task that needs to be performed * before the cycle of libraries can be resolved, or `null` if the libraries * are ready to be resolved. */ AnalysisContextImpl_TaskData get taskData => _taskData; /** * Compute a list of the libraries that need to be resolved together in orde * to resolve the given [librarySource]. */ void computeCycleContaining(Source librarySource) { // // Create the object representing the library being resolved. // ResolvableLibrary targetLibrary = _createLibrary(librarySource); // // Compute the set of libraries that need to be resolved together. // _dependencyGraph = new DirectedGraph<ResolvableLibrary>(); _computeLibraryDependencies(targetLibrary); if (_taskData != null) { return; } _librariesInCycle = _dependencyGraph.findCycleContaining(targetLibrary); // // Ensure that all of the data needed to resolve them has been computed. // _ensureImportsAndExports(); if (_taskData != null) { // At least one imported library needs to be resolved before the target // library. AnalysisTask task = _taskData.task; if (task is ResolveDartLibraryTask) { AnalysisContextImpl_this._workManager.addFirst( task.librarySource, SourcePriority.LIBRARY); } return; } _computePartsInCycle(librarySource); if (_taskData != null) { // At least one part needs to be parsed. return; } // All of the AST's necessary to perform a resolution of the library cycle // have been gathered, so it is no longer necessary to retain them in the // cache. AnalysisContextImpl_this._neededForResolution = null; } bool _addDependency(ResolvableLibrary dependant, Source dependency, List<ResolvableLibrary> dependencyList) { if (dependant.librarySource == dependency) { // Don't add a dependency of a library on itself; there's no point. return true; } ResolvableLibrary importedLibrary = _libraryMap[dependency]; if (importedLibrary == null) { importedLibrary = _createLibraryOrNull(dependency); if (importedLibrary != null) { _computeLibraryDependencies(importedLibrary); if (_taskData != null) { return false; } } } if (importedLibrary != null) { if (dependencyList != null) { dependencyList.add(importedLibrary); } _dependencyGraph.addEdge(dependant, importedLibrary); } return true; } /** * Recursively traverse the libraries reachable from the given [library], * creating instances of the class [Library] to represent them, and record the * references in the library objects. * * Throws an [AnalysisException] if some portion of the library graph could * not be traversed. */ void _computeLibraryDependencies(ResolvableLibrary library) { Source librarySource = library.librarySource; DartEntry dartEntry = AnalysisContextImpl_this._getReadableDartEntry(librarySource); List<Source> importedSources = _getSources(librarySource, dartEntry, DartEntry.IMPORTED_LIBRARIES); if (_taskData != null) { return; } List<Source> exportedSources = _getSources(librarySource, dartEntry, DartEntry.EXPORTED_LIBRARIES); if (_taskData != null) { return; } _computeLibraryDependenciesFromDirectives( library, importedSources, exportedSources); } /** * Recursively traverse the libraries reachable from the given [library], * creating instances of the class [Library] to represent them, and record the * references in the library objects. The [importedSources] is a list * containing the sources that are imported into the given library. The * [exportedSources] is a list containing the sources that are exported from * the given library. */ void _computeLibraryDependenciesFromDirectives(ResolvableLibrary library, List<Source> importedSources, List<Source> exportedSources) { int importCount = importedSources.length; List<ResolvableLibrary> importedLibraries = new List<ResolvableLibrary>(); bool explicitlyImportsCore = false; bool importsAsync = false; for (int i = 0; i < importCount; i++) { Source importedSource = importedSources[i]; if (importedSource == AnalysisContextImpl_this._coreLibrarySource) { explicitlyImportsCore = true; } else if (importedSource == AnalysisContextImpl_this._asyncLibrarySource) { importsAsync = true; } if (!_addDependency(library, importedSource, importedLibraries)) { return; } } library.explicitlyImportsCore = explicitlyImportsCore; if (!explicitlyImportsCore) { if (!_addDependency(library, AnalysisContextImpl_this._coreLibrarySource, importedLibraries)) { return; } } if (!importsAsync) { // Add a dependency on async to ensure that the Future element will be // built before we generate errors and warnings for async methods. Also // include it in importedLibraries, so that it will be picked up by // LibraryResolver2._buildLibraryMap(). // TODO(paulberry): this is a bit of a hack, since the async library // isn't actually being imported. Also, it's not clear whether it should // be necessary: in theory, dart:core already (indirectly) imports // dart:async, so if core has been built, async should have been built // too. However, removing this code causes unit test failures. if (!_addDependency(library, AnalysisContextImpl_this._asyncLibrarySource, importedLibraries)) { return; } } library.importedLibraries = importedLibraries; int exportCount = exportedSources.length; if (exportCount > 0) { List<ResolvableLibrary> exportedLibraries = new List<ResolvableLibrary>(); for (int i = 0; i < exportCount; i++) { Source exportedSource = exportedSources[i]; if (!_addDependency(library, exportedSource, exportedLibraries)) { return; } } library.exportedLibraries = exportedLibraries; } } /** * Gather the resolvable AST structures for each of the compilation units in * each of the libraries in the cycle. This is done in two phases: first we * ensure that we have cached an AST structure for each compilation unit, then * we gather them. We split the work this way because getting the AST * structures can change the state of the cache in such a way that we would * have more work to do if any compilation unit didn't have a resolvable AST * structure. */ void _computePartsInCycle(Source librarySource) { int count = _librariesInCycle.length; List<CycleBuilder_LibraryPair> libraryData = new List<CycleBuilder_LibraryPair>(); for (int i = 0; i < count; i++) { ResolvableLibrary library = _librariesInCycle[i]; libraryData.add(new CycleBuilder_LibraryPair( library, _ensurePartsInLibrary(library))); } AnalysisContextImpl_this._neededForResolution = _gatherSources(libraryData); if (AnalysisContextImpl._TRACE_PERFORM_TASK) { print( " preserve resolution data for ${AnalysisContextImpl_this._neededForResolution.length} sources while resolving ${librarySource.fullName}"); } if (_taskData != null) { return; } for (int i = 0; i < count; i++) { _computePartsInLibrary(libraryData[i]); } } /** * Gather the resolvable compilation units for each of the compilation units * in the library represented by the [libraryPair]. */ void _computePartsInLibrary(CycleBuilder_LibraryPair libraryPair) { ResolvableLibrary library = libraryPair.library; List<CycleBuilder_SourceEntryPair> entryPairs = libraryPair.entryPairs; int count = entryPairs.length; List<ResolvableCompilationUnit> units = new List<ResolvableCompilationUnit>(count); for (int i = 0; i < count; i++) { CycleBuilder_SourceEntryPair entryPair = entryPairs[i]; Source source = entryPair.source; DartEntry dartEntry = entryPair.entry; units[i] = new ResolvableCompilationUnit( source, dartEntry.resolvableCompilationUnit); } library.resolvableCompilationUnits = units; } /** * Create an object to represent the information about the library defined by * the compilation unit with the given [librarySource]. */ ResolvableLibrary _createLibrary(Source librarySource) { ResolvableLibrary library = new ResolvableLibrary(librarySource); SourceEntry sourceEntry = AnalysisContextImpl_this._cache.get(librarySource); if (sourceEntry is DartEntry) { LibraryElementImpl libraryElement = sourceEntry.getValue(DartEntry.ELEMENT) as LibraryElementImpl; if (libraryElement != null) { library.libraryElement = libraryElement; } } _libraryMap[librarySource] = library; return library; } /** * Create an object to represent the information about the library defined by * the compilation unit with the given [librarySource]. */ ResolvableLibrary _createLibraryOrNull(Source librarySource) { ResolvableLibrary library = new ResolvableLibrary(librarySource); SourceEntry sourceEntry = AnalysisContextImpl_this._cache.get(librarySource); if (sourceEntry is DartEntry) { LibraryElementImpl libraryElement = sourceEntry.getValue(DartEntry.ELEMENT) as LibraryElementImpl; if (libraryElement != null) { library.libraryElement = libraryElement; } } _libraryMap[librarySource] = library; return library; } /** * Ensure that the given [library] has an element model built for it. If * another task needs to be executed first in order to build the element * model, that task is placed in [taskData]. */ void _ensureElementModel(ResolvableLibrary library) { Source librarySource = library.librarySource; DartEntry libraryEntry = AnalysisContextImpl_this._getReadableDartEntry(librarySource); if (libraryEntry != null && libraryEntry.getState(DartEntry.PARSED_UNIT) != CacheState.ERROR) { AnalysisContextImpl_this._workManager.addFirst( librarySource, SourcePriority.LIBRARY); if (_taskData == null) { _taskData = AnalysisContextImpl_this._createResolveDartLibraryTask( librarySource, libraryEntry); } } } /** * Ensure that all of the libraries that are exported by the given [library] * (but are not themselves in the cycle) have element models built for them. * If another task needs to be executed first in order to build the element * model, that task is placed in [taskData]. */ void _ensureExports( ResolvableLibrary library, HashSet<Source> visitedLibraries) { List<ResolvableLibrary> dependencies = library.exports; int dependencyCount = dependencies.length; for (int i = 0; i < dependencyCount; i++) { ResolvableLibrary dependency = dependencies[i]; if (!_librariesInCycle.contains(dependency) && visitedLibraries.add(dependency.librarySource)) { if (dependency.libraryElement == null) { _ensureElementModel(dependency); } else { _ensureExports(dependency, visitedLibraries); } if (_taskData != null) { return; } } } } /** * Ensure that all of the libraries that are exported by the given [library] * (but are not themselves in the cycle) have element models built for them. * If another task needs to be executed first in order to build the element * model, that task is placed in [taskData]. */ void _ensureImports(ResolvableLibrary library) { List<ResolvableLibrary> dependencies = library.imports; int dependencyCount = dependencies.length; for (int i = 0; i < dependencyCount; i++) { ResolvableLibrary dependency = dependencies[i]; if (!_librariesInCycle.contains(dependency) && dependency.libraryElement == null) { _ensureElementModel(dependency); if (_taskData != null) { return; } } } } /** * Ensure that all of the libraries that are either imported or exported by * libraries in the cycle (but are not themselves in the cycle) have element * models built for them. */ void _ensureImportsAndExports() { HashSet<Source> visitedLibraries = new HashSet<Source>(); int libraryCount = _librariesInCycle.length; for (int i = 0; i < libraryCount; i++) { ResolvableLibrary library = _librariesInCycle[i]; _ensureImports(library); if (_taskData != null) { return; } _ensureExports(library, visitedLibraries); if (_taskData != null) { return; } } } /** * Ensure that there is a resolvable compilation unit available for all of the * compilation units in the given [library]. */ List<CycleBuilder_SourceEntryPair> _ensurePartsInLibrary( ResolvableLibrary library) { List<CycleBuilder_SourceEntryPair> pairs = new List<CycleBuilder_SourceEntryPair>(); Source librarySource = library.librarySource; DartEntry libraryEntry = AnalysisContextImpl_this._getReadableDartEntry(librarySource); if (libraryEntry == null) { throw new AnalysisException( "Cannot find entry for ${librarySource.fullName}"); } else if (libraryEntry.getState(DartEntry.PARSED_UNIT) == CacheState.ERROR) { String message = "Cannot compute parsed unit for ${librarySource.fullName}"; CaughtException exception = libraryEntry.exception; if (exception == null) { throw new AnalysisException(message); } throw new AnalysisException( message, new CaughtException(exception, null)); } _ensureResolvableCompilationUnit(librarySource, libraryEntry); pairs.add(new CycleBuilder_SourceEntryPair(librarySource, libraryEntry)); List<Source> partSources = _getSources(librarySource, libraryEntry, DartEntry.INCLUDED_PARTS); int count = partSources.length; for (int i = 0; i < count; i++) { Source partSource = partSources[i]; DartEntry partEntry = AnalysisContextImpl_this._getReadableDartEntry(partSource); if (partEntry != null && partEntry.getState(DartEntry.PARSED_UNIT) != CacheState.ERROR) { _ensureResolvableCompilationUnit(partSource, partEntry); pairs.add(new CycleBuilder_SourceEntryPair(partSource, partEntry)); } } return pairs; } /** * Ensure that there is a resolvable compilation unit available for the given * [source]. */ void _ensureResolvableCompilationUnit(Source source, DartEntry dartEntry) { // The entry will be null if the source represents a non-Dart file. if (dartEntry != null && !dartEntry.hasResolvableCompilationUnit) { if (_taskData == null) { _taskData = AnalysisContextImpl_this._createParseDartTask(source, dartEntry); } } } HashSet<Source> _gatherSources(List<CycleBuilder_LibraryPair> libraryData) { int libraryCount = libraryData.length; HashSet<Source> sources = new HashSet<Source>(); for (int i = 0; i < libraryCount; i++) { List<CycleBuilder_SourceEntryPair> entryPairs = libraryData[i].entryPairs; int entryCount = entryPairs.length; for (int j = 0; j < entryCount; j++) { sources.add(entryPairs[j].source); } } return sources; } /** * Return the sources described by the given [descriptor]. */ List<Source> _getSources(Source source, DartEntry dartEntry, DataDescriptor<List<Source>> descriptor) { if (dartEntry == null) { return Source.EMPTY_ARRAY; } CacheState exportState = dartEntry.getState(descriptor); if (exportState == CacheState.ERROR) { return Source.EMPTY_ARRAY; } else if (exportState != CacheState.VALID) { if (_taskData == null) { _taskData = AnalysisContextImpl_this._createParseDartTask(source, dartEntry); } return Source.EMPTY_ARRAY; } return dartEntry.getValue(descriptor); } } /** * Information about the next task to be performed. Each data has an implicit * associated source: the source that might need to be analyzed. There are * essentially three states that can be represented: * * * If [getTask] returns a non-`null` value, then that is the task that should * be executed to further analyze the associated source. * * Otherwise, if [isBlocked] returns `true`, then there is no work that can be * done, but analysis for the associated source is not complete. * * Otherwise, [getDependentSource] should return a source that needs to be * analyzed before the analysis of the associated source can be completed. */ class AnalysisContextImpl_TaskData { /** * The task that is to be performed. */ final AnalysisTask task; /** * A flag indicating whether the associated source is blocked waiting for its * contents to be loaded. */ final bool _blocked; /** * Initialize a newly created data holder. */ AnalysisContextImpl_TaskData(this.task, this._blocked); /** * Return `true` if the associated source is blocked waiting for its contents * to be loaded. */ bool get isBlocked => _blocked; @override String toString() { if (task == null) { return "blocked: $_blocked"; } return task.toString(); } } /** * Statistics and information about a single [AnalysisContext]. */ abstract class AnalysisContextStatistics { /** * Return the statistics for each kind of cached data. */ List<AnalysisContextStatistics_CacheRow> get cacheRows; /** * Return the exceptions that caused some entries to have a state of * [CacheState.ERROR]. */ List<CaughtException> get exceptions; /** * Return information about each of the partitions in the cache. */ List<AnalysisContextStatistics_PartitionData> get partitionData; /** * Return a list containing all of the sources in the cache. */ List<Source> get sources; } /** * Information about single piece of data in the cache. */ abstract class AnalysisContextStatistics_CacheRow { /** * List of possible states which can be queried. */ static const List<CacheState> STATES = const <CacheState>[ CacheState.ERROR, CacheState.FLUSHED, CacheState.IN_PROCESS, CacheState.INVALID, CacheState.VALID ]; /** * Return the number of entries whose state is [CacheState.ERROR]. */ int get errorCount; /** * Return the number of entries whose state is [CacheState.FLUSHED]. */ int get flushedCount; /** * Return the number of entries whose state is [CacheState.IN_PROCESS]. */ int get inProcessCount; /** * Return the number of entries whose state is [CacheState.INVALID]. */ int get invalidCount; /** * Return the name of the data represented by this object. */ String get name; /** * Return the number of entries whose state is [CacheState.VALID]. */ int get validCount; /** * Return the number of entries whose state is [state]. */ int getCount(CacheState state); } /** * Information about a single partition in the cache. */ abstract class AnalysisContextStatistics_PartitionData { /** * Return the number of entries in the partition that have an AST structure in * one state or another. */ int get astCount; /** * Return the total number of entries in the partition. */ int get totalCount; } /** * Implementation of the [AnalysisContextStatistics]. */ class AnalysisContextStatisticsImpl implements AnalysisContextStatistics { Map<String, AnalysisContextStatistics_CacheRow> _dataMap = new HashMap<String, AnalysisContextStatistics_CacheRow>(); List<Source> _sources = new List<Source>(); HashSet<CaughtException> _exceptions = new HashSet<CaughtException>(); List<AnalysisContextStatistics_PartitionData> _partitionData; @override List<AnalysisContextStatistics_CacheRow> get cacheRows => _dataMap.values.toList(); @override List<CaughtException> get exceptions => new List.from(_exceptions); @override List<AnalysisContextStatistics_PartitionData> get partitionData => _partitionData; /** * Set the partition data returned by this object to the given data. */ void set partitionData(List<AnalysisContextStatistics_PartitionData> data) { _partitionData = data; } @override List<Source> get sources => _sources; void addSource(Source source) { _sources.add(source); } void _internalPutCacheItem(Source source, SourceEntry dartEntry, DataDescriptor rowDesc, CacheState state) { String rowName = rowDesc.toString(); AnalysisContextStatisticsImpl_CacheRowImpl row = _dataMap[rowName] as AnalysisContextStatisticsImpl_CacheRowImpl; if (row == null) { row = new AnalysisContextStatisticsImpl_CacheRowImpl(rowName); _dataMap[rowName] = row; } row._incState(state); if (state == CacheState.ERROR) { CaughtException exception = dartEntry.exception; if (exception != null) { _exceptions.add(exception); } } } } class AnalysisContextStatisticsImpl_CacheRowImpl implements AnalysisContextStatistics_CacheRow { final String name; Map<CacheState, int> _counts = <CacheState, int>{}; AnalysisContextStatisticsImpl_CacheRowImpl(this.name); @override int get errorCount => getCount(CacheState.ERROR); @override int get flushedCount => getCount(CacheState.FLUSHED); @override int get hashCode => name.hashCode; @override int get inProcessCount => getCount(CacheState.IN_PROCESS); @override int get invalidCount => getCount(CacheState.INVALID); @override int get validCount => getCount(CacheState.VALID); @override bool operator ==(Object obj) => obj is AnalysisContextStatisticsImpl_CacheRowImpl && obj.name == name; @override int getCount(CacheState state) { int count = _counts[state]; if (count != null) { return count; } else { return 0; } } void _incState(CacheState state) { if (_counts[state] == null) { _counts[state] = 1; } else { _counts[state]++; } } } class AnalysisContextStatisticsImpl_PartitionDataImpl implements AnalysisContextStatistics_PartitionData { final int astCount; final int totalCount; AnalysisContextStatisticsImpl_PartitionDataImpl( this.astCount, this.totalCount); } /** * A representation of changes to the types of analysis that should be * performed. */ class AnalysisDelta { /** * A mapping from source to what type of analysis should be performed on that * source. */ HashMap<Source, AnalysisLevel> _analysisMap = new HashMap<Source, AnalysisLevel>(); /** * Return a collection of the sources that have been added. This is equivalent * to calling [getAnalysisLevels] and collecting all sources that do not have * an analysis level of [AnalysisLevel.NONE]. */ List<Source> get addedSources { List<Source> result = new List<Source>(); _analysisMap.forEach((Source source, AnalysisLevel level) { if (level != AnalysisLevel.NONE) { result.add(source); } }); return result; } /** * Return a mapping of sources to the level of analysis that should be * performed. */ Map<Source, AnalysisLevel> get analysisLevels => _analysisMap; /** * Record that the given [source] should be analyzed at the given [level]. */ void setAnalysisLevel(Source source, AnalysisLevel level) { _analysisMap[source] = level; } @override String toString() { StringBuffer buffer = new StringBuffer(); bool needsSeparator = _appendSources(buffer, false, AnalysisLevel.ALL); needsSeparator = _appendSources(buffer, needsSeparator, AnalysisLevel.RESOLVED); _appendSources(buffer, needsSeparator, AnalysisLevel.NONE); return buffer.toString(); } /** * Appendto the given [buffer] all sources with the given analysis [level], * prefixed with a label and a separator if [needsSeparator] is `true`. */ bool _appendSources( StringBuffer buffer, bool needsSeparator, AnalysisLevel level) { bool first = true; _analysisMap.forEach((Source source, AnalysisLevel sourceLevel) { if (sourceLevel == level) { if (first) { first = false; if (needsSeparator) { buffer.write("; "); } buffer.write(level); buffer.write(" "); } else { buffer.write(", "); } buffer.write(source.fullName); } }); return needsSeparator || !first; } } /** * The entry point for the functionality provided by the analysis engine. There * is a single instance of this class. */ class AnalysisEngine { /** * The suffix used for Dart source files. */ static const String SUFFIX_DART = "dart"; /** * The short suffix used for HTML files. */ static const String SUFFIX_HTM = "htm"; /** * The long suffix used for HTML files. */ static const String SUFFIX_HTML = "html"; /** * The unique instance of this class. */ static final AnalysisEngine instance = new AnalysisEngine._(); /** * The logger that should receive information about errors within the analysis * engine. */ Logger _logger = Logger.NULL; /** * The plugin that defines the extension points and extensions that are * inherently defined by the analysis engine. */ final EnginePlugin enginePlugin = new EnginePlugin(); /** * The instrumentation service that is to be used by this analysis engine. */ InstrumentationService _instrumentationService = InstrumentationService.NULL_SERVICE; /** * The partition manager being used to manage the shared partitions. */ final PartitionManager partitionManager = new PartitionManager(); AnalysisEngine._(); /** * Return the instrumentation service that is to be used by this analysis * engine. */ InstrumentationService get instrumentationService => _instrumentationService; /** * Set the instrumentation service that is to be used by this analysis engine * to the given [service]. */ void set instrumentationService(InstrumentationService service) { if (service == null) { _instrumentationService = InstrumentationService.NULL_SERVICE; } else { _instrumentationService = service; } } /** * Return the logger that should receive information about errors within the * analysis engine. */ Logger get logger => _logger; /** * Set the logger that should receive information about errors within the * analysis engine to the given [logger]. */ void set logger(Logger logger) { this._logger = logger == null ? Logger.NULL : logger; } /** * Clear any caches holding on to analysis results so that a full re-analysis * will be performed the next time an analysis context is created. */ void clearCaches() { partitionManager.clearCache(); } /** * Create and return a new context in which analysis can be performed. */ AnalysisContext createAnalysisContext() { return new AnalysisContextImpl(); } /** * Return `true` if the given [fileName] is assumed to contain Dart source * code. */ static bool isDartFileName(String fileName) { if (fileName == null) { return false; } return javaStringEqualsIgnoreCase( FileNameUtilities.getExtension(fileName), SUFFIX_DART); } /** * Return `true` if the given [fileName] is assumed to contain HTML. */ static bool isHtmlFileName(String fileName) { if (fileName == null) { return false; } String extension = FileNameUtilities.getExtension(fileName); return javaStringEqualsIgnoreCase(extension, SUFFIX_HTML) || javaStringEqualsIgnoreCase(extension, SUFFIX_HTM); } } /** * The analysis errors and line information for the errors. */ abstract class AnalysisErrorInfo { /** * Return the errors that as a result of the analysis, or `null` if there were * no errors. */ List<AnalysisError> get errors; /** * Return the line information associated with the errors, or `null` if there * were no errors. */ LineInfo get lineInfo; } /** * The analysis errors and line info associated with a source. */ class AnalysisErrorInfoImpl implements AnalysisErrorInfo { /** * The analysis errors associated with a source, or `null` if there are no * errors. */ final List<AnalysisError> errors; /** * The line information associated with the errors, or `null` if there are no * errors. */ final LineInfo lineInfo; /** * Initialize an newly created error info with the given [errors] and * [lineInfo]. */ AnalysisErrorInfoImpl(this.errors, this.lineInfo); } /** * The levels at which a source can be analyzed. */ class AnalysisLevel extends Enum<AnalysisLevel> { /** * Indicates a source should be fully analyzed. */ static const AnalysisLevel ALL = const AnalysisLevel('ALL', 0); /** * Indicates a source should be resolved and that errors, warnings and hints are needed. */ static const AnalysisLevel ERRORS = const AnalysisLevel('ERRORS', 1); /** * Indicates a source should be resolved, but that errors, warnings and hints are not needed. */ static const AnalysisLevel RESOLVED = const AnalysisLevel('RESOLVED', 2); /** * Indicates a source is not of interest to the client. */ static const AnalysisLevel NONE = const AnalysisLevel('NONE', 3); static const List<AnalysisLevel> values = const [ALL, ERRORS, RESOLVED, NONE]; const AnalysisLevel(String name, int ordinal) : super(name, ordinal); } /** * An object that is listening for results being produced by an analysis * context. */ abstract class AnalysisListener { /** * Reports that a task, described by the given [taskDescription] is about to * be performed by the given [context]. */ void aboutToPerformTask(AnalysisContext context, String taskDescription); /** * Reports that the [errors] associated with the given [source] in the given * [context] has been updated to the given errors. The [lineInfo] is the line * information associated with the source. */ void computedErrors(AnalysisContext context, Source source, List<AnalysisError> errors, LineInfo lineInfo); /** * Reports that the given [source] is no longer included in the set of sources * that are being analyzed by the given analysis [context]. */ void excludedSource(AnalysisContext context, Source source); /** * Reports that the given [source] is now included in the set of sources that * are being analyzed by the given analysis [context]. */ void includedSource(AnalysisContext context, Source source); /** * Reports that the given Dart [source] was parsed in the given [context], * producing the given [unit]. */ void parsedDart(AnalysisContext context, Source source, CompilationUnit unit); /** * Reports that the given HTML [source] was parsed in the given [context]. */ void parsedHtml(AnalysisContext context, Source source, ht.HtmlUnit unit); /** * Reports that the given Dart [source] was resolved in the given [context]. */ void resolvedDart( AnalysisContext context, Source source, CompilationUnit unit); /** * Reports that the given HTML [source] was resolved in the given [context]. */ void resolvedHtml(AnalysisContext context, Source source, ht.HtmlUnit unit); } /** * Futures returned by [AnalysisContext] for pending analysis results will * complete with this error if it is determined that analysis results will * never become available (e.g. because the requested source is not subject to * analysis, or because the requested source is a part file which is not a part * of any known library). */ class AnalysisNotScheduledError implements Exception {} /** * A set of analysis options used to control the behavior of an analysis * context. */ abstract class AnalysisOptions { /** * If analysis is to parse and analyze all function bodies, return `true`. * If analysis is to skip all function bodies, return `false`. If analysis * is to parse and analyze function bodies in some sources and not in others, * throw an exception. * * This getter is deprecated; consider using [analyzeFunctionBodiesPredicate] * instead. */ @deprecated // Use this.analyzeFunctionBodiesPredicate bool get analyzeFunctionBodies; /** * Function that returns `true` if analysis is to parse and analyze function * bodies for a given source. */ AnalyzeFunctionBodiesPredicate get analyzeFunctionBodiesPredicate; /** * Return the maximum number of sources for which AST structures should be * kept in the cache. */ int get cacheSize; /** * Return `true` if analysis is to generate dart2js related hint results. */ bool get dart2jsHint; /** * Return `true` if analysis is to include the new async support. */ @deprecated // Always true bool get enableAsync; /** * Return `true` if analysis is to include the new deferred loading support. */ @deprecated // Always true bool get enableDeferredLoading; /** * Return `true` if analysis is to include the new enum support. */ @deprecated // Always true bool get enableEnum; /** * Return `true` to enable null-aware operators (DEP 9). */ bool get enableNullAwareOperators; /** * Return `true` to strictly follow the specification when generating * warnings on "call" methods (fixes dartbug.com/21938). */ bool get enableStrictCallChecks; /** * Return `true` if errors, warnings and hints should be generated for sources * that are implicitly being analyzed. The default value is `true`. */ bool get generateImplicitErrors; /** * Return `true` if errors, warnings and hints should be generated for sources * in the SDK. The default value is `false`. */ bool get generateSdkErrors; /** * Return `true` if analysis is to generate hint results (e.g. type inference * based information and pub best practices). */ bool get hint; /** * Return `true` if incremental analysis should be used. */ bool get incremental; /** * A flag indicating whether incremental analysis should be used for API * changes. */ bool get incrementalApi; /** * A flag indicating whether validation should be performed after incremental * analysis. */ bool get incrementalValidation; /** * Return `true` if analysis is to generate lint warnings. */ bool get lint; /** * Return `true` if analysis is to parse comments. */ bool get preserveComments; } /** * A set of analysis options used to control the behavior of an analysis * context. */ class AnalysisOptionsImpl implements AnalysisOptions { /** * The maximum number of sources for which data should be kept in the cache. */ static const int DEFAULT_CACHE_SIZE = 64; /** * The default value for enabling deferred loading. */ @deprecated static bool DEFAULT_ENABLE_DEFERRED_LOADING = true; /** * The default value for enabling enum support. */ @deprecated static bool DEFAULT_ENABLE_ENUM = false; /** * A predicate indicating whether analysis is to parse and analyze function * bodies. */ AnalyzeFunctionBodiesPredicate _analyzeFunctionBodiesPredicate = _analyzeAllFunctionBodies; /** * The maximum number of sources for which AST structures should be kept in * the cache. */ int cacheSize = DEFAULT_CACHE_SIZE; /** * A flag indicating whether analysis is to generate dart2js related hint * results. */ bool dart2jsHint = true; /** * A flag indicating whether null-aware operators should be parsed (DEP 9). */ bool enableNullAwareOperators = false; /** * A flag indicating whether analysis is to strictly follow the specification * when generating warnings on "call" methods (fixes dartbug.com/21938). */ bool enableStrictCallChecks = false; /** * A flag indicating whether errors, warnings and hints should be generated * for sources that are implicitly being analyzed. */ bool generateImplicitErrors = true; /** * A flag indicating whether errors, warnings and hints should be generated * for sources in the SDK. */ bool generateSdkErrors = false; /** * A flag indicating whether analysis is to generate hint results (e.g. type * inference based information and pub best practices). */ bool hint = true; /** * A flag indicating whether incremental analysis should be used. */ bool incremental = false; /** * A flag indicating whether incremental analysis should be used for API * changes. */ bool incrementalApi = false; /** * A flag indicating whether validation should be performed after incremental * analysis. */ bool incrementalValidation = false; /** * A flag indicating whether analysis is to generate lint warnings. */ bool lint = false; /** * A flag indicating whether analysis is to parse comments. */ bool preserveComments = true; /** * Initialize a newly created set of analysis options to have their default * values. */ AnalysisOptionsImpl(); /** * Initialize a newly created set of analysis options to have the same values * as those in the given set of analysis [options]. */ AnalysisOptionsImpl.con1(AnalysisOptions options) { analyzeFunctionBodiesPredicate = options.analyzeFunctionBodiesPredicate; cacheSize = options.cacheSize; dart2jsHint = options.dart2jsHint; enableNullAwareOperators = options.enableNullAwareOperators; enableStrictCallChecks = options.enableStrictCallChecks; generateImplicitErrors = options.generateImplicitErrors; generateSdkErrors = options.generateSdkErrors; hint = options.hint; incremental = options.incremental; incrementalApi = options.incrementalApi; incrementalValidation = options.incrementalValidation; lint = options.lint; preserveComments = options.preserveComments; } bool get analyzeFunctionBodies { if (identical(analyzeFunctionBodiesPredicate, _analyzeAllFunctionBodies)) { return true; } else if (identical( analyzeFunctionBodiesPredicate, _analyzeNoFunctionBodies)) { return false; } else { throw new StateError('analyzeFunctionBodiesPredicate in use'); } } set analyzeFunctionBodies(bool value) { if (value) { analyzeFunctionBodiesPredicate = _analyzeAllFunctionBodies; } else { analyzeFunctionBodiesPredicate = _analyzeNoFunctionBodies; } } @override AnalyzeFunctionBodiesPredicate get analyzeFunctionBodiesPredicate => _analyzeFunctionBodiesPredicate; set analyzeFunctionBodiesPredicate(AnalyzeFunctionBodiesPredicate value) { if (value == null) { throw new ArgumentError.notNull('analyzeFunctionBodiesPredicate'); } _analyzeFunctionBodiesPredicate = value; } @deprecated @override bool get enableAsync => true; @deprecated void set enableAsync(bool enable) { // Async support cannot be disabled } @deprecated @override bool get enableDeferredLoading => true; @deprecated void set enableDeferredLoading(bool enable) { // Deferred loading support cannot be disabled } @deprecated @override bool get enableEnum => true; @deprecated void set enableEnum(bool enable) { // Enum support cannot be disabled } /** * Predicate used for [analyzeFunctionBodiesPredicate] when * [analyzeFunctionBodies] is set to `true`. */ static bool _analyzeAllFunctionBodies(Source _) => true; /** * Predicate used for [analyzeFunctionBodiesPredicate] when * [analyzeFunctionBodies] is set to `false`. */ static bool _analyzeNoFunctionBodies(Source _) => false; } /** * */ class AnalysisResult { /** * The change notices associated with this result, or `null` if there were no * changes and there is no more work to be done. */ final List<ChangeNotice> _notices; /** * The number of milliseconds required to determine which task was to be * performed. */ final int getTime; /** * The name of the class of the task that was performed. */ final String taskClassName; /** * The number of milliseconds required to perform the task. */ final int performTime; /** * Initialize a newly created analysis result to have the given values. The * [notices] is the change notices associated with this result. The [getTime] * is the number of milliseconds required to determine which task was to be * performed. The [taskClassName] is the name of the class of the task that * was performed. The [performTime] is the number of milliseconds required to * perform the task. */ AnalysisResult( this._notices, this.getTime, this.taskClassName, this.performTime); /** * Return the change notices associated with this result, or `null` if there * were no changes and there is no more work to be done. */ List<ChangeNotice> get changeNotices => _notices; /** * Return `true` if there is more to be performed after the task that was * performed. */ bool get hasMoreWork => _notices != null; } /** * An analysis task. */ abstract class AnalysisTask { /** * The context in which the task is to be performed. */ final InternalAnalysisContext context; /** * The exception that was thrown while performing this task, or `null` if the * task completed successfully. */ CaughtException _thrownException; /** * Initialize a newly created task to perform analysis within the given * [context]. */ AnalysisTask(this.context); /** * Return the exception that was thrown while performing this task, or `null` * if the task completed successfully. */ CaughtException get exception => _thrownException; /** * Return a textual description of this task. */ String get taskDescription; /** * Use the given [visitor] to visit this task. Throws an [AnalysisException] * if the visitor throws the exception. */ accept(AnalysisTaskVisitor visitor); /** * Perform this analysis task, protected by an exception handler. Throws an * [AnalysisException] if an exception occurs while performing the task. */ void internalPerform(); /** * Perform this analysis task and use the given [visitor] to visit this task * after it has completed. Throws an [AnalysisException] if the visitor throws * the exception. */ Object perform(AnalysisTaskVisitor visitor) { try { _safelyPerform(); } on AnalysisException catch (exception, stackTrace) { _thrownException = new CaughtException(exception, stackTrace); AnalysisEngine.instance.logger.logInformation( "Task failed: $taskDescription", new CaughtException(exception, stackTrace)); } return PerformanceStatistics.analysisTaskVisitor .makeCurrentWhile(() => accept(visitor)); } @override String toString() => taskDescription; /** * Perform this analysis task, ensuring that all exceptions are wrapped in an * [AnalysisException]. Throws an [AnalysisException] if any exception occurs * while performing the task */ void _safelyPerform() { try { String contextName = context.name; if (contextName == null) { contextName = 'unnamed'; } AnalysisEngine.instance.instrumentationService.logAnalysisTask( contextName, taskDescription); internalPerform(); } on AnalysisException { rethrow; } catch (exception, stackTrace) { throw new AnalysisException( exception.toString(), new CaughtException(exception, stackTrace)); } } } /** * An object used to visit tasks. While tasks are not structured in any * interesting way, this class provides the ability to dispatch to an * appropriate method. */ abstract class AnalysisTaskVisitor<E> { /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitBuildUnitElementTask(BuildUnitElementTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitGenerateDartErrorsTask(GenerateDartErrorsTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitGenerateDartHintsTask(GenerateDartHintsTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitGenerateDartLintsTask(GenerateDartLintsTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitGetContentTask(GetContentTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitIncrementalAnalysisTask( IncrementalAnalysisTask incrementalAnalysisTask); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitParseDartTask(ParseDartTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitParseHtmlTask(ParseHtmlTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitResolveDartLibraryCycleTask(ResolveDartLibraryCycleTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitResolveDartLibraryTask(ResolveDartLibraryTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitResolveDartUnitTask(ResolveDartUnitTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitResolveHtmlTask(ResolveHtmlTask task); /** * Visit the given [task], returning the result of the visit. This method will * throw an AnalysisException if the visitor throws an exception. */ E visitScanDartTask(ScanDartTask task); } /** * A `CachedResult` is a single analysis result that is stored in a * [SourceEntry]. */ class CachedResult<E> { /** * The state of the cached value. */ CacheState state; /** * The value being cached, or `null` if there is no value (for example, when * the [state] is [CacheState.INVALID]. */ E value; /** * Initialize a newly created result holder to represent the value of data * described by the given [descriptor]. */ CachedResult(DataDescriptor descriptor) { state = CacheState.INVALID; value = descriptor.defaultValue; } } /** * A single partition in an LRU cache of information related to analysis. */ abstract class CachePartition { /** * The context that owns this partition. Multiple contexts can reference a * partition, but only one context can own it. */ final InternalAnalysisContext context; /** * The maximum number of sources for which AST structures should be kept in * the cache. */ int _maxCacheSize = 0; /** * The policy used to determine which pieces of data to remove from the cache. */ final CacheRetentionPolicy _retentionPolicy; /** * A table mapping the sources belonging to this partition to the information * known about those sources. */ HashMap<Source, SourceEntry> _sourceMap = new HashMap<Source, SourceEntry>(); /** * A list containing the most recently accessed sources with the most recently * used at the end of the list. When more sources are added than the maximum * allowed then the least recently used source will be removed and will have * it's cached AST structure flushed. */ List<Source> _recentlyUsed; /** * Initialize a newly created cache to maintain at most [maxCacheSize] AST * structures in the cache. The cache is owned by the give [context], and the * [retentionPolicy] will be used to determine which pieces of data to remove * from the cache. */ CachePartition(this.context, int maxCacheSize, this._retentionPolicy) { this._maxCacheSize = maxCacheSize; _recentlyUsed = new List<Source>(); } /** * Return the number of entries in this partition that have an AST associated * with them. */ int get astSize { int astSize = 0; int count = _recentlyUsed.length; for (int i = 0; i < count; i++) { Source source = _recentlyUsed[i]; SourceEntry sourceEntry = _sourceMap[source]; if (sourceEntry is DartEntry) { if (sourceEntry.anyParsedCompilationUnit != null) { astSize++; } } else if (sourceEntry is HtmlEntry) { if (sourceEntry.anyParsedUnit != null) { astSize++; } } } return astSize; } /** * Return a table mapping the sources known to the context to the information * known about the source. * * Note: This method is only visible for use by [AnalysisCache] and * should not be used for any other purpose. */ Map<Source, SourceEntry> get map => _sourceMap; /** * Set the maximum size of the cache to the given [size]. */ void set maxCacheSize(int size) { _maxCacheSize = size; while (_recentlyUsed.length > _maxCacheSize) { if (!_flushAstFromCache()) { break; } } } /** * Record that the AST associated with the given source was just read from the * cache. */ void accessedAst(Source source) { if (_recentlyUsed.remove(source)) { _recentlyUsed.add(source); return; } while (_recentlyUsed.length >= _maxCacheSize) { if (!_flushAstFromCache()) { break; } } _recentlyUsed.add(source); } /** * Return `true` if the given [source] is contained in this partition. */ bool contains(Source source); /** * Return the entry associated with the given [source]. */ SourceEntry get(Source source) => _sourceMap[source]; /** * Return an iterator returning all of the map entries mapping sources to * cache entries. */ MapIterator<Source, SourceEntry> iterator() => new SingleMapIterator<Source, SourceEntry>(_sourceMap); /** * Associate the given [entry] with the given [source]. */ void put(Source source, SourceEntry entry) { entry.fixExceptionState(); _sourceMap[source] = entry; } /** * Remove all information related to the given [source] from this cache. */ void remove(Source source) { _recentlyUsed.remove(source); _sourceMap.remove(source); } /** * Record that the AST associated with the given [source] was just removed * from the cache. */ void removedAst(Source source) { _recentlyUsed.remove(source); } /** * Return the number of sources that are mapped to cache entries. */ int size() => _sourceMap.length; /** * Record that the AST associated with the given [source] was just stored to * the cache. */ void storedAst(Source source) { if (_recentlyUsed.contains(source)) { return; } while (_recentlyUsed.length >= _maxCacheSize) { if (!_flushAstFromCache()) { break; } } _recentlyUsed.add(source); } /** * Attempt to flush one AST structure from the cache. Return `true` if a * structure was flushed. */ bool _flushAstFromCache() { Source removedSource = _removeAstToFlush(); if (removedSource == null) { return false; } SourceEntry sourceEntry = _sourceMap[removedSource]; if (sourceEntry is HtmlEntry) { HtmlEntry htmlEntry = sourceEntry; htmlEntry.flushAstStructures(); } else if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; dartEntry.flushAstStructures(); } return true; } /** * Remove and return one source from the list of recently used sources whose * AST structure can be flushed from the cache. The source that will be * returned will be the source that has been unreferenced for the longest * period of time but that is not a priority for analysis. */ Source _removeAstToFlush() { int sourceToRemove = -1; for (int i = 0; i < _recentlyUsed.length; i++) { Source source = _recentlyUsed[i]; RetentionPriority priority = _retentionPolicy.getAstPriority(source, _sourceMap[source]); if (priority == RetentionPriority.LOW) { return _recentlyUsed.removeAt(i); } else if (priority == RetentionPriority.MEDIUM && sourceToRemove < 0) { sourceToRemove = i; } } if (sourceToRemove < 0) { // This happens if the retention policy returns a priority of HIGH for all // of the sources that have been recently used. This is the case, for // example, when the list of priority sources is bigger than the current // cache size. return null; } return _recentlyUsed.removeAt(sourceToRemove); } } /** * An object used to determine how important it is for data to be retained in * the analysis cache. */ abstract class CacheRetentionPolicy { /** * Return the priority of retaining the AST structure for the given [source]. */ RetentionPriority getAstPriority(Source source, SourceEntry sourceEntry); } /** * The possible states of cached data. */ class CacheState extends Enum<CacheState> { /** * The data is not in the cache and the last time an attempt was made to * compute the data an exception occurred, making it pointless to attempt to * compute the data again. * * Valid Transitions: * * [INVALID] if a source was modified that might cause the data to be * computable */ static const CacheState ERROR = const CacheState('ERROR', 0); /** * The data is not in the cache because it was flushed from the cache in order * to control memory usage. If the data is recomputed, results do not need to * be reported. * * Valid Transitions: * * [IN_PROCESS] if the data is being recomputed * * [INVALID] if a source was modified that causes the data to need to be * recomputed */ static const CacheState FLUSHED = const CacheState('FLUSHED', 1); /** * The data might or might not be in the cache but is in the process of being * recomputed. * * Valid Transitions: * * [ERROR] if an exception occurred while trying to compute the data * * [VALID] if the data was successfully computed and stored in the cache */ static const CacheState IN_PROCESS = const CacheState('IN_PROCESS', 2); /** * The data is not in the cache and needs to be recomputed so that results can * be reported. * * Valid Transitions: * * [IN_PROCESS] if an attempt is being made to recompute the data */ static const CacheState INVALID = const CacheState('INVALID', 3); /** * The data is in the cache and up-to-date. * * Valid Transitions: * * [FLUSHED] if the data is removed in order to manage memory usage * * [INVALID] if a source was modified in such a way as to invalidate the * previous data */ static const CacheState VALID = const CacheState('VALID', 4); static const List<CacheState> values = const [ ERROR, FLUSHED, IN_PROCESS, INVALID, VALID ]; const CacheState(String name, int ordinal) : super(name, ordinal); } /** * An object that represents a change to the analysis results associated with a * given source. */ abstract class ChangeNotice implements AnalysisErrorInfo { /** * The parsed, but maybe not resolved Dart AST that changed as a result of * the analysis, or `null` if the AST was not changed. */ CompilationUnit get parsedDartUnit; /** * The fully resolved Dart AST that changed as a result of the analysis, or * `null` if the AST was not changed. */ CompilationUnit get resolvedDartUnit; /** * The fully resolved HTML AST that changed as a result of the analysis, or * `null` if the AST was not changed. */ ht.HtmlUnit get resolvedHtmlUnit; /** * Return the source for which the result is being reported. */ Source get source; } /** * An implementation of a [ChangeNotice]. */ class ChangeNoticeImpl implements ChangeNotice { /** * An empty list of change notices. */ static const List<ChangeNoticeImpl> EMPTY_ARRAY = const <ChangeNoticeImpl>[]; /** * The source for which the result is being reported. */ final Source source; /** * The parsed, but maybe not resolved Dart AST that changed as a result of * the analysis, or `null` if the AST was not changed. */ CompilationUnit parsedDartUnit; /** * The fully resolved Dart AST that changed as a result of the analysis, or * `null` if the AST was not changed. */ CompilationUnit resolvedDartUnit; /** * The fully resolved HTML AST that changed as a result of the analysis, or * `null` if the AST was not changed. */ ht.HtmlUnit resolvedHtmlUnit; /** * The errors that changed as a result of the analysis, or `null` if errors * were not changed. */ List<AnalysisError> _errors; /** * The line information associated with the source, or `null` if errors were * not changed. */ LineInfo _lineInfo; /** * Initialize a newly created notice associated with the given source. * * @param source the source for which the change is being reported */ ChangeNoticeImpl(this.source); @override List<AnalysisError> get errors => _errors; @override LineInfo get lineInfo => _lineInfo; /** * Set the errors that changed as a result of the analysis to the given * [errors] and set the line information to the given [lineInfo]. */ void setErrors(List<AnalysisError> errors, LineInfo lineInfo) { this._errors = errors; this._lineInfo = lineInfo; if (lineInfo == null) { AnalysisEngine.instance.logger.logInformation("No line info: $source", new CaughtException(new AnalysisException(), null)); } } @override String toString() => "Changes for ${source.fullName}"; } /** * An indication of which sources have been added, changed, removed, or deleted. * In the case of a changed source, there are multiple ways of indicating the * nature of the change. * * No source should be added to the change set more than once, either with the * same or a different kind of change. It does not make sense, for example, for * a source to be both added and removed, and it is redundant for a source to be * marked as changed in its entirety and changed in some specific range. */ class ChangeSet { /** * A list containing the sources that have been added. */ final List<Source> addedSources = new List<Source>(); /** * A list containing the sources that have been changed. */ final List<Source> changedSources = new List<Source>(); /** * A table mapping the sources whose content has been changed to the current * content of those sources. */ HashMap<Source, String> _changedContent = new HashMap<Source, String>(); /** * A table mapping the sources whose content has been changed within a single * range to the current content of those sources and information about the * affected range. */ final HashMap<Source, ChangeSet_ContentChange> changedRanges = new HashMap<Source, ChangeSet_ContentChange>(); /** * A list containing the sources that have been removed. */ final List<Source> removedSources = new List<Source>(); /** * A list containing the source containers specifying additional sources that * have been removed. */ final List<SourceContainer> removedContainers = new List<SourceContainer>(); /** * A list containing the sources that have been deleted. */ final List<Source> deletedSources = new List<Source>(); /** * Return a table mapping the sources whose content has been changed to the * current content of those sources. */ Map<Source, String> get changedContents => _changedContent; /** * Return `true` if this change set does not contain any changes. */ bool get isEmpty => addedSources.isEmpty && changedSources.isEmpty && _changedContent.isEmpty && changedRanges.isEmpty && removedSources.isEmpty && removedContainers.isEmpty && deletedSources.isEmpty; /** * Record that the specified [source] has been added and that its content is * the default contents of the source. */ void addedSource(Source source) { addedSources.add(source); } /** * Record that the specified [source] has been changed and that its content is * the given [contents]. */ void changedContent(Source source, String contents) { _changedContent[source] = contents; } /** * Record that the specified [source] has been changed and that its content is * the given [contents]. The [offset] is the offset into the current contents. * The [oldLength] is the number of characters in the original contents that * were replaced. The [newLength] is the number of characters in the * replacement text. */ void changedRange(Source source, String contents, int offset, int oldLength, int newLength) { changedRanges[source] = new ChangeSet_ContentChange(contents, offset, oldLength, newLength); } /** * Record that the specified [source] has been changed. If the content of the * source was previously overridden, this has no effect (the content remains * overridden). To cancel (or change) the override, use [changedContent] * instead. */ void changedSource(Source source) { changedSources.add(source); } /** * Record that the specified [source] has been deleted. */ void deletedSource(Source source) { deletedSources.add(source); } /** * Record that the specified source [container] has been removed. */ void removedContainer(SourceContainer container) { if (container != null) { removedContainers.add(container); } } /** * Record that the specified [source] has been removed. */ void removedSource(Source source) { if (source != null) { removedSources.add(source); } } @override String toString() { StringBuffer buffer = new StringBuffer(); bool needsSeparator = _appendSources(buffer, addedSources, false, "addedSources"); needsSeparator = _appendSources( buffer, changedSources, needsSeparator, "changedSources"); needsSeparator = _appendSources2( buffer, _changedContent, needsSeparator, "changedContent"); needsSeparator = _appendSources2(buffer, changedRanges, needsSeparator, "changedRanges"); needsSeparator = _appendSources( buffer, deletedSources, needsSeparator, "deletedSources"); needsSeparator = _appendSources( buffer, removedSources, needsSeparator, "removedSources"); int count = removedContainers.length; if (count > 0) { if (removedSources.isEmpty) { if (needsSeparator) { buffer.write("; "); } buffer.write("removed: from "); buffer.write(count); buffer.write(" containers"); } else { buffer.write(", and more from "); buffer.write(count); buffer.write(" containers"); } } return buffer.toString(); } /** * Append the given [sources] to the given [buffer], prefixed with the given * [label] and a separator if [needsSeparator] is `true`. Return `true` if * future lists of sources will need a separator. */ bool _appendSources(StringBuffer buffer, List<Source> sources, bool needsSeparator, String label) { if (sources.isEmpty) { return needsSeparator; } if (needsSeparator) { buffer.write("; "); } buffer.write(label); String prefix = " "; for (Source source in sources) { buffer.write(prefix); buffer.write(source.fullName); prefix = ", "; } return true; } /** * Append the given [sources] to the given [builder], prefixed with the given * [label] and a separator if [needsSeparator] is `true`. Return `true` if * future lists of sources will need a separator. */ bool _appendSources2(StringBuffer buffer, HashMap<Source, dynamic> sources, bool needsSeparator, String label) { if (sources.isEmpty) { return needsSeparator; } if (needsSeparator) { buffer.write("; "); } buffer.write(label); String prefix = " "; for (Source source in sources.keys.toSet()) { buffer.write(prefix); buffer.write(source.fullName); prefix = ", "; } return true; } } /** * A change to the content of a source. */ class ChangeSet_ContentChange { /** * The new contents of the source. */ final String contents; /** * The offset into the current contents. */ final int offset; /** * The number of characters in the original contents that were replaced */ final int oldLength; /** * The number of characters in the replacement text. */ final int newLength; /** * Initialize a newly created change object to represent a change to the * content of a source. The [contents] is the new contents of the source. The * [offse] ist the offset into the current contents. The [oldLength] is the * number of characters in the original contents that were replaced. The * [newLength] is the number of characters in the replacement text. */ ChangeSet_ContentChange( this.contents, this.offset, this.oldLength, this.newLength); } /** * A pair containing a library and a list of the (source, entry) pairs for * compilation units in the library. */ class CycleBuilder_LibraryPair { /** * The library containing the compilation units. */ ResolvableLibrary library; /** * The (source, entry) pairs representing the compilation units in the * library. */ List<CycleBuilder_SourceEntryPair> entryPairs; /** * Initialize a newly created pair from the given [library] and [entryPairs]. */ CycleBuilder_LibraryPair(ResolvableLibrary library, List<CycleBuilder_SourceEntryPair> entryPairs) { this.library = library; this.entryPairs = entryPairs; } } /** * A pair containing a source and the cache entry associated with that source. * They are used to reduce the number of times an entry must be looked up in the * [cache]. */ class CycleBuilder_SourceEntryPair { /** * The source associated with the entry. */ Source source; /** * The entry associated with the source. */ DartEntry entry; /** * Initialize a newly created pair from the given [source] and [entry]. */ CycleBuilder_SourceEntryPair(Source source, DartEntry entry) { this.source = source; this.entry = entry; } } /** * The information cached by an analysis context about an individual Dart file. */ class DartEntry extends SourceEntry { /** * The data descriptor representing the element model representing a single * compilation unit. This model is incomplete and should not be used except as * input to another task. */ static final DataDescriptor<List<AnalysisError>> BUILT_ELEMENT = new DataDescriptor<List<AnalysisError>>("DartEntry.BUILT_ELEMENT"); /** * The data descriptor representing the AST structure after the element model * has been built (and declarations are resolved) but before other resolution * has been performed. */ static final DataDescriptor<CompilationUnit> BUILT_UNIT = new DataDescriptor<CompilationUnit>("DartEntry.BUILT_UNIT"); /** * The data descriptor representing the list of libraries that contain this * compilation unit. */ static final DataDescriptor<List<Source>> CONTAINING_LIBRARIES = new DataDescriptor<List<Source>>( "DartEntry.CONTAINING_LIBRARIES", Source.EMPTY_ARRAY); /** * The data descriptor representing the library element for the library. This * data is only available for Dart files that are the defining compilation * unit of a library. */ static final DataDescriptor<LibraryElement> ELEMENT = new DataDescriptor<LibraryElement>("DartEntry.ELEMENT"); /** * The data descriptor representing the list of exported libraries. This data * is only available for Dart files that are the defining compilation unit of * a library. */ static final DataDescriptor<List<Source>> EXPORTED_LIBRARIES = new DataDescriptor<List<Source>>( "DartEntry.EXPORTED_LIBRARIES", Source.EMPTY_ARRAY); /** * The data descriptor representing the hints resulting from auditing the * source. */ static final DataDescriptor<List<AnalysisError>> HINTS = new DataDescriptor<List<AnalysisError>>( "DartEntry.HINTS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the list of imported libraries. This data * is only available for Dart files that are the defining compilation unit of * a library. */ static final DataDescriptor<List<Source>> IMPORTED_LIBRARIES = new DataDescriptor<List<Source>>( "DartEntry.IMPORTED_LIBRARIES", Source.EMPTY_ARRAY); /** * The data descriptor representing the list of included parts. This data is * only available for Dart files that are the defining compilation unit of a * library. */ static final DataDescriptor<List<Source>> INCLUDED_PARTS = new DataDescriptor<List<Source>>( "DartEntry.INCLUDED_PARTS", Source.EMPTY_ARRAY); /** * The data descriptor representing the client flag. This data is only * available for Dart files that are the defining compilation unit of a * library. */ static final DataDescriptor<bool> IS_CLIENT = new DataDescriptor<bool>("DartEntry.IS_CLIENT", false); /** * The data descriptor representing the launchable flag. This data is only * available for Dart files that are the defining compilation unit of a * library. */ static final DataDescriptor<bool> IS_LAUNCHABLE = new DataDescriptor<bool>("DartEntry.IS_LAUNCHABLE", false); /** * The data descriptor representing lint warnings resulting from auditing the * source. */ static final DataDescriptor<List<AnalysisError>> LINTS = new DataDescriptor<List<AnalysisError>>( "DartEntry.LINTS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the errors resulting from parsing the * source. */ static final DataDescriptor<List<AnalysisError>> PARSE_ERRORS = new DataDescriptor<List<AnalysisError>>( "DartEntry.PARSE_ERRORS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the parsed AST structure. */ static final DataDescriptor<CompilationUnit> PARSED_UNIT = new DataDescriptor<CompilationUnit>("DartEntry.PARSED_UNIT"); /** * The data descriptor representing the public namespace of the library. This * data is only available for Dart files that are the defining compilation * unit of a library. */ static final DataDescriptor<Namespace> PUBLIC_NAMESPACE = new DataDescriptor<Namespace>("DartEntry.PUBLIC_NAMESPACE"); /** * The data descriptor representing the errors resulting from resolving the * source. */ static final DataDescriptor<List<AnalysisError>> RESOLUTION_ERRORS = new DataDescriptor<List<AnalysisError>>( "DartEntry.RESOLUTION_ERRORS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the resolved AST structure. */ static final DataDescriptor<CompilationUnit> RESOLVED_UNIT = new DataDescriptor<CompilationUnit>("DartEntry.RESOLVED_UNIT"); /** * The data descriptor representing the errors resulting from scanning the * source. */ static final DataDescriptor<List<AnalysisError>> SCAN_ERRORS = new DataDescriptor<List<AnalysisError>>( "DartEntry.SCAN_ERRORS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the source kind. */ static final DataDescriptor<SourceKind> SOURCE_KIND = new DataDescriptor<SourceKind>( "DartEntry.SOURCE_KIND", SourceKind.UNKNOWN); /** * The data descriptor representing the token stream. */ static final DataDescriptor<Token> TOKEN_STREAM = new DataDescriptor<Token>("DartEntry.TOKEN_STREAM"); /** * The data descriptor representing the errors resulting from verifying the * source. */ static final DataDescriptor<List<AnalysisError>> VERIFICATION_ERRORS = new DataDescriptor<List<AnalysisError>>( "DartEntry.VERIFICATION_ERRORS", AnalysisError.NO_ERRORS); /** * The list of libraries that contain this compilation unit. The list will be * empty if there are no known libraries that contain this compilation unit. */ List<Source> _containingLibraries = new List<Source>(); /** * The information known as a result of resolving this compilation unit as * part of the library that contains this unit. This field will never be * `null`. */ ResolutionState _resolutionState = new ResolutionState(); /** * Return all of the errors associated with the compilation unit that are * currently cached. */ List<AnalysisError> get allErrors { List<AnalysisError> errors = new List<AnalysisError>(); errors.addAll(super.allErrors); errors.addAll(getValue(SCAN_ERRORS)); errors.addAll(getValue(PARSE_ERRORS)); ResolutionState state = _resolutionState; while (state != null) { errors.addAll(state.getValue(RESOLUTION_ERRORS)); errors.addAll(state.getValue(VERIFICATION_ERRORS)); errors.addAll(state.getValue(HINTS)); errors.addAll(state.getValue(LINTS)); state = state._nextState; } if (errors.length == 0) { return AnalysisError.NO_ERRORS; } return errors; } /** * Return a valid parsed compilation unit, either an unresolved AST structure * or the result of resolving the AST structure in the context of some * library, or `null` if there is no parsed compilation unit available. */ CompilationUnit get anyParsedCompilationUnit { if (getState(PARSED_UNIT) == CacheState.VALID) { return getValue(PARSED_UNIT); } ResolutionState state = _resolutionState; while (state != null) { if (state.getState(BUILT_UNIT) == CacheState.VALID) { return state.getValue(BUILT_UNIT); } state = state._nextState; } return anyResolvedCompilationUnit; } /** * Return the result of resolving the compilation unit as part of any library, * or `null` if there is no cached resolved compilation unit. */ CompilationUnit get anyResolvedCompilationUnit { ResolutionState state = _resolutionState; while (state != null) { if (state.getState(RESOLVED_UNIT) == CacheState.VALID) { return state.getValue(RESOLVED_UNIT); } state = state._nextState; } return null; } /** * The libraries that are known to contain this part. */ List<Source> get containingLibraries => _containingLibraries; /** * Set the list of libraries that contain this compilation unit to contain * only the given [librarySource]. This method should only be invoked on * entries that represent a library. */ void set containingLibrary(Source librarySource) { _containingLibraries.clear(); _containingLibraries.add(librarySource); } @override List<DataDescriptor> get descriptors { List<DataDescriptor> result = super.descriptors; result.addAll(<DataDescriptor>[ DartEntry.SOURCE_KIND, DartEntry.CONTAINING_LIBRARIES, DartEntry.PARSE_ERRORS, DartEntry.PARSED_UNIT, DartEntry.SCAN_ERRORS, DartEntry.SOURCE_KIND, DartEntry.TOKEN_STREAM ]); SourceKind kind = getValue(DartEntry.SOURCE_KIND); if (kind == SourceKind.LIBRARY) { result.addAll(<DataDescriptor>[ DartEntry.ELEMENT, DartEntry.EXPORTED_LIBRARIES, DartEntry.IMPORTED_LIBRARIES, DartEntry.INCLUDED_PARTS, DartEntry.IS_CLIENT, DartEntry.IS_LAUNCHABLE, DartEntry.PUBLIC_NAMESPACE ]); } return result; } /** * Return `true` if this entry has an AST structure that can be resolved, even * if it needs to be copied. Returning `true` implies that the method * [resolvableCompilationUnit] will return a non-`null` result. */ bool get hasResolvableCompilationUnit { if (getState(PARSED_UNIT) == CacheState.VALID) { return true; } ResolutionState state = _resolutionState; while (state != null) { if (state.getState(BUILT_UNIT) == CacheState.VALID || state.getState(RESOLVED_UNIT) == CacheState.VALID) { return true; } state = state._nextState; } return false; } /** * Return `true` if this data is safe to use in refactoring. */ bool get isRefactoringSafe { ResolutionState state = _resolutionState; while (state != null) { CacheState resolvedState = state.getState(RESOLVED_UNIT); if (resolvedState != CacheState.VALID && resolvedState != CacheState.FLUSHED) { return false; } state = state._nextState; } return true; } @override SourceKind get kind => getValue(SOURCE_KIND); /** * The library sources containing the receiver's source. */ List<Source> get librariesContaining { ResolutionState state = _resolutionState; List<Source> result = new List<Source>(); while (state != null) { if (state._librarySource != null) { result.add(state._librarySource); } state = state._nextState; } return result; } /** * Get a list of all the library-dependent descriptors for which values may * be stored in this SourceEntry. */ List<DataDescriptor> get libraryDescriptors { return <DataDescriptor>[ DartEntry.BUILT_ELEMENT, DartEntry.BUILT_UNIT, DartEntry.RESOLUTION_ERRORS, DartEntry.RESOLVED_UNIT, DartEntry.VERIFICATION_ERRORS, DartEntry.HINTS, DartEntry.LINTS ]; } /** * A compilation unit that has not been accessed by any other client and can * therefore safely be modified by the reconciler, or `null` if the source has * not been parsed. */ CompilationUnit get resolvableCompilationUnit { if (getState(PARSED_UNIT) == CacheState.VALID) { CompilationUnit unit = getValue(PARSED_UNIT); setState(PARSED_UNIT, CacheState.FLUSHED); return unit; } ResolutionState state = _resolutionState; while (state != null) { if (state.getState(BUILT_UNIT) == CacheState.VALID) { // TODO(brianwilkerson) We're cloning the structure to remove any // previous resolution data, but I'm not sure that's necessary. return state.getValue(BUILT_UNIT).accept(new AstCloner()); } if (state.getState(RESOLVED_UNIT) == CacheState.VALID) { return state.getValue(RESOLVED_UNIT).accept(new AstCloner()); } state = state._nextState; } return null; } /** * Add the given [librarySource] to the list of libraries that contain this * part. This method should only be invoked on entries that represent a part. */ void addContainingLibrary(Source librarySource) { _containingLibraries.add(librarySource); } /** * Flush any AST structures being maintained by this entry. */ void flushAstStructures() { _flush(TOKEN_STREAM); _flush(PARSED_UNIT); _resolutionState.flushAstStructures(); } /** * Return the state of the data represented by the given [descriptor] in the * context of the given [librarySource]. */ CacheState getStateInLibrary( DataDescriptor descriptor, Source librarySource) { if (!_isValidLibraryDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } ResolutionState state = _resolutionState; while (state != null) { if (librarySource == state._librarySource) { return state.getState(descriptor); } state = state._nextState; } return CacheState.INVALID; } /** * Return the value of the data represented by the given [descriptor] in the * context of the given [librarySource], or `null` if the data represented by * the descriptor is not in the cache. */ Object getValueInLibrary(DataDescriptor descriptor, Source librarySource) { if (!_isValidLibraryDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } ResolutionState state = _resolutionState; while (state != null) { if (librarySource == state._librarySource) { return state.getValue(descriptor); } state = state._nextState; } return descriptor.defaultValue; } /** * Return `true` if the data represented by the given [descriptor] is marked * as being invalid. If the descriptor represents library-specific data then * this method will return `true` if the data associated with any library it * marked as invalid. */ bool hasInvalidData(DataDescriptor descriptor) { if (_isValidDescriptor(descriptor)) { return getState(descriptor) == CacheState.INVALID; } else if (_isValidLibraryDescriptor(descriptor)) { ResolutionState state = _resolutionState; while (state != null) { if (state.getState(descriptor) == CacheState.INVALID) { return true; } state = state._nextState; } } return false; } @override void invalidateAllInformation() { super.invalidateAllInformation(); setState(SCAN_ERRORS, CacheState.INVALID); setState(TOKEN_STREAM, CacheState.INVALID); setState(SOURCE_KIND, CacheState.INVALID); setState(PARSE_ERRORS, CacheState.INVALID); setState(PARSED_UNIT, CacheState.INVALID); _discardCachedResolutionInformation(true); } /** * Invalidate all of the resolution information associated with the * compilation unit. The flag [invalidateUris] should be `true` if the cached * results of converting URIs to source files should also be invalidated. */ void invalidateAllResolutionInformation(bool invalidateUris) { if (getState(PARSED_UNIT) == CacheState.FLUSHED) { ResolutionState state = _resolutionState; while (state != null) { if (state.getState(BUILT_UNIT) == CacheState.VALID) { CompilationUnit unit = state.getValue(BUILT_UNIT); setValue(PARSED_UNIT, unit.accept(new AstCloner())); break; } else if (state.getState(RESOLVED_UNIT) == CacheState.VALID) { CompilationUnit unit = state.getValue(RESOLVED_UNIT); setValue(PARSED_UNIT, unit.accept(new AstCloner())); break; } state = state._nextState; } } _discardCachedResolutionInformation(invalidateUris); } /** * Invalidate all of the parse and resolution information associated with * this source. */ void invalidateParseInformation() { setState(SOURCE_KIND, CacheState.INVALID); setState(PARSE_ERRORS, CacheState.INVALID); setState(PARSED_UNIT, CacheState.INVALID); _containingLibraries.clear(); _discardCachedResolutionInformation(true); } /** * Record that an [exception] occurred while attempting to build the element * model for the source represented by this entry in the context of the given * [library]. This will set the state of all resolution-based information as * being in error, but will not change the state of any parse results. */ void recordBuildElementErrorInLibrary( Source librarySource, CaughtException exception) { setStateInLibrary(BUILT_ELEMENT, librarySource, CacheState.ERROR); setStateInLibrary(BUILT_UNIT, librarySource, CacheState.ERROR); recordResolutionErrorInLibrary(librarySource, exception); } @override void recordContentError(CaughtException exception) { super.recordContentError(exception); recordScanError(exception); } /** * Record that an error occurred while attempting to generate hints for the * source represented by this entry. This will set the state of all * verification information as being in error. The [librarySource] is the * source of the library in which hints were being generated. The [exception] * is the exception that shows where the error occurred. */ void recordHintErrorInLibrary( Source librarySource, CaughtException exception) { this.exception = exception; ResolutionState state = _getOrCreateResolutionState(librarySource); state.recordHintError(); } /** * Record that an error occurred while attempting to generate lints for the * source represented by this entry. This will set the state of all * verification information as being in error. The [librarySource] is the * source of the library in which lints were being generated. The [exception] * is the exception that shows where the error occurred. */ void recordLintErrorInLibrary( Source librarySource, CaughtException exception) { this.exception = exception; ResolutionState state = _getOrCreateResolutionState(librarySource); state.recordLintError(); } /** * Record that an [exception] occurred while attempting to scan or parse the * entry represented by this entry. This will set the state of all information, * including any resolution-based information, as being in error. */ void recordParseError(CaughtException exception) { setState(SOURCE_KIND, CacheState.ERROR); setState(PARSE_ERRORS, CacheState.ERROR); setState(PARSED_UNIT, CacheState.ERROR); setState(EXPORTED_LIBRARIES, CacheState.ERROR); setState(IMPORTED_LIBRARIES, CacheState.ERROR); setState(INCLUDED_PARTS, CacheState.ERROR); recordResolutionError(exception); } /** * Record that an [exception] occurred while attempting to resolve the source * represented by this entry. This will set the state of all resolution-based * information as being in error, but will not change the state of any parse * results. */ void recordResolutionError(CaughtException exception) { this.exception = exception; setState(ELEMENT, CacheState.ERROR); setState(IS_CLIENT, CacheState.ERROR); setState(IS_LAUNCHABLE, CacheState.ERROR); setState(PUBLIC_NAMESPACE, CacheState.ERROR); _resolutionState.recordResolutionErrorsInAllLibraries(); } /** * Record that an error occurred while attempting to resolve the source * represented by this entry. This will set the state of all resolution-based * information as being in error, but will not change the state of any parse * results. The [librarySource] is the source of the library in which * resolution was being performed. The [exception] is the exception that shows * where the error occurred. */ void recordResolutionErrorInLibrary( Source librarySource, CaughtException exception) { this.exception = exception; setState(ELEMENT, CacheState.ERROR); setState(IS_CLIENT, CacheState.ERROR); setState(IS_LAUNCHABLE, CacheState.ERROR); setState(PUBLIC_NAMESPACE, CacheState.ERROR); ResolutionState state = _getOrCreateResolutionState(librarySource); state.recordResolutionError(); } /** * Record that an [exception] occurred while attempting to scan or parse the * entry represented by this entry. This will set the state of all * information, including any resolution-based information, as being in error. */ @override void recordScanError(CaughtException exception) { super.recordScanError(exception); setState(SCAN_ERRORS, CacheState.ERROR); setState(TOKEN_STREAM, CacheState.ERROR); recordParseError(exception); } /** * Record that an [exception] occurred while attempting to generate errors and * warnings for the source represented by this entry. This will set the state * of all verification information as being in error. The [librarySource] is * the source of the library in which verification was being performed. The * [exception] is the exception that shows where the error occurred. */ void recordVerificationErrorInLibrary( Source librarySource, CaughtException exception) { this.exception = exception; ResolutionState state = _getOrCreateResolutionState(librarySource); state.recordVerificationError(); } /** * Remove the given [library] from the list of libraries that contain this * part. This method should only be invoked on entries that represent a part. */ void removeContainingLibrary(Source library) { _containingLibraries.remove(library); } /** * Remove any resolution information associated with this compilation unit * being part of the given [library], presumably because it is no longer part * of the library. */ void removeResolution(Source library) { if (library != null) { if (library == _resolutionState._librarySource) { if (_resolutionState._nextState == null) { _resolutionState.invalidateAllResolutionInformation(); } else { _resolutionState = _resolutionState._nextState; } } else { ResolutionState priorState = _resolutionState; ResolutionState state = _resolutionState._nextState; while (state != null) { if (library == state._librarySource) { priorState._nextState = state._nextState; break; } priorState = state; state = state._nextState; } } } } /** * Set the state of the data represented by the given [descriptor] in the * context of the given [library] to the given [state]. */ void setStateInLibrary( DataDescriptor descriptor, Source library, CacheState state) { if (!_isValidLibraryDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } ResolutionState resolutionState = _getOrCreateResolutionState(library); resolutionState.setState(descriptor, state); } /** * Set the value of the data represented by the given [descriptor] in the * context of the given [library] to the given [value], and set the state of * that data to [CacheState.VALID]. */ void setValueInLibrary( DataDescriptor descriptor, Source library, Object value) { if (!_isValidLibraryDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } ResolutionState state = _getOrCreateResolutionState(library); state.setValue(descriptor, value); } /** * Invalidate all of the resolution information associated with the * compilation unit. The flag [invalidateUris] should be `true` if the cached * results of converting URIs to source files should also be invalidated. */ void _discardCachedResolutionInformation(bool invalidateUris) { setState(ELEMENT, CacheState.INVALID); setState(IS_CLIENT, CacheState.INVALID); setState(IS_LAUNCHABLE, CacheState.INVALID); setState(PUBLIC_NAMESPACE, CacheState.INVALID); _resolutionState.invalidateAllResolutionInformation(); if (invalidateUris) { setState(EXPORTED_LIBRARIES, CacheState.INVALID); setState(IMPORTED_LIBRARIES, CacheState.INVALID); setState(INCLUDED_PARTS, CacheState.INVALID); } } /** * Return a resolution state for the specified [library], creating one as * necessary. */ ResolutionState _getOrCreateResolutionState(Source library) { ResolutionState state = _resolutionState; if (state._librarySource == null) { state._librarySource = library; return state; } while (state._librarySource != library) { if (state._nextState == null) { ResolutionState newState = new ResolutionState(); newState._librarySource = library; state._nextState = newState; return newState; } state = state._nextState; } return state; } @override bool _isValidDescriptor(DataDescriptor descriptor) { return descriptor == CONTAINING_LIBRARIES || descriptor == ELEMENT || descriptor == EXPORTED_LIBRARIES || descriptor == IMPORTED_LIBRARIES || descriptor == INCLUDED_PARTS || descriptor == IS_CLIENT || descriptor == IS_LAUNCHABLE || descriptor == PARSED_UNIT || descriptor == PARSE_ERRORS || descriptor == PUBLIC_NAMESPACE || descriptor == SCAN_ERRORS || descriptor == SOURCE_KIND || descriptor == TOKEN_STREAM || super._isValidDescriptor(descriptor); } /** * Return `true` if the [descriptor] is valid for this entry when the data is * relative to a library. */ bool _isValidLibraryDescriptor(DataDescriptor descriptor) { return descriptor == BUILT_ELEMENT || descriptor == BUILT_UNIT || descriptor == HINTS || descriptor == LINTS || descriptor == RESOLUTION_ERRORS || descriptor == RESOLVED_UNIT || descriptor == VERIFICATION_ERRORS; } @override bool _writeDiffOn(StringBuffer buffer, SourceEntry oldEntry) { bool needsSeparator = super._writeDiffOn(buffer, oldEntry); if (oldEntry is! DartEntry) { if (needsSeparator) { buffer.write("; "); } buffer.write("entry type changed; was "); buffer.write(oldEntry.runtimeType.toString()); return true; } needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "tokenStream", DartEntry.TOKEN_STREAM, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "scanErrors", DartEntry.SCAN_ERRORS, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "sourceKind", DartEntry.SOURCE_KIND, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "parsedUnit", DartEntry.PARSED_UNIT, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "parseErrors", DartEntry.PARSE_ERRORS, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "importedLibraries", DartEntry.IMPORTED_LIBRARIES, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "exportedLibraries", DartEntry.EXPORTED_LIBRARIES, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "includedParts", DartEntry.INCLUDED_PARTS, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "element", DartEntry.ELEMENT, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "publicNamespace", DartEntry.PUBLIC_NAMESPACE, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "clientServer", DartEntry.IS_CLIENT, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "launchable", DartEntry.IS_LAUNCHABLE, oldEntry); // TODO(brianwilkerson) Add better support for containingLibraries. // It would be nice to be able to report on size-preserving changes. int oldLibraryCount = (oldEntry as DartEntry)._containingLibraries.length; int libraryCount = _containingLibraries.length; if (oldLibraryCount != libraryCount) { if (needsSeparator) { buffer.write("; "); } buffer.write("containingLibraryCount = "); buffer.write(oldLibraryCount); buffer.write(" -> "); buffer.write(libraryCount); needsSeparator = true; } // // Report change to the per-library state. // HashMap<Source, ResolutionState> oldStateMap = new HashMap<Source, ResolutionState>(); ResolutionState state = (oldEntry as DartEntry)._resolutionState; while (state != null) { Source librarySource = state._librarySource; if (librarySource != null) { oldStateMap[librarySource] = state; } state = state._nextState; } state = _resolutionState; while (state != null) { Source librarySource = state._librarySource; if (librarySource != null) { ResolutionState oldState = oldStateMap.remove(librarySource); if (oldState == null) { if (needsSeparator) { buffer.write("; "); } buffer.write("added resolution for "); buffer.write(librarySource.fullName); needsSeparator = true; } else { needsSeparator = oldState._writeDiffOn( buffer, needsSeparator, oldEntry as DartEntry); } } state = state._nextState; } for (Source librarySource in oldStateMap.keys.toSet()) { if (needsSeparator) { buffer.write("; "); } buffer.write("removed resolution for "); buffer.write(librarySource.fullName); needsSeparator = true; } return needsSeparator; } @override void _writeOn(StringBuffer buffer) { buffer.write("Dart: "); super._writeOn(buffer); _writeStateOn(buffer, "tokenStream", TOKEN_STREAM); _writeStateOn(buffer, "scanErrors", SCAN_ERRORS); _writeStateOn(buffer, "sourceKind", SOURCE_KIND); _writeStateOn(buffer, "parsedUnit", PARSED_UNIT); _writeStateOn(buffer, "parseErrors", PARSE_ERRORS); _writeStateOn(buffer, "exportedLibraries", EXPORTED_LIBRARIES); _writeStateOn(buffer, "importedLibraries", IMPORTED_LIBRARIES); _writeStateOn(buffer, "includedParts", INCLUDED_PARTS); _writeStateOn(buffer, "element", ELEMENT); _writeStateOn(buffer, "publicNamespace", PUBLIC_NAMESPACE); _writeStateOn(buffer, "clientServer", IS_CLIENT); _writeStateOn(buffer, "launchable", IS_LAUNCHABLE); _resolutionState._writeOn(buffer); } } /** * An immutable constant representing data that can be stored in the cache. */ class DataDescriptor<E> { /** * The next artificial hash code. */ static int _NEXT_HASH_CODE = 0; /** * The artifitial hash code for this object. */ final int _hashCode = _NEXT_HASH_CODE++; /** * The name of the descriptor, used for debugging purposes. */ final String _name; /** * The default value used when the data does not exist. */ final E defaultValue; /** * Initialize a newly created descriptor to have the given [name] and * [defaultValue]. */ DataDescriptor(this._name, [this.defaultValue = null]); @override int get hashCode => _hashCode; @override String toString() => _name; } /** * A retention policy that will keep AST's in the cache if there is analysis * information that needs to be computed for a source, where the computation is * dependent on having the AST. */ class DefaultRetentionPolicy implements CacheRetentionPolicy { /** * An instance of this class that can be shared. */ static DefaultRetentionPolicy POLICY = new DefaultRetentionPolicy(); /** * Return `true` if there is analysis information in the given [dartEntry] * that needs to be computed, where the computation is dependent on having the * AST. */ bool astIsNeeded(DartEntry dartEntry) => dartEntry.hasInvalidData(DartEntry.HINTS) || dartEntry.hasInvalidData(DartEntry.LINTS) || dartEntry.hasInvalidData(DartEntry.VERIFICATION_ERRORS) || dartEntry.hasInvalidData(DartEntry.RESOLUTION_ERRORS); @override RetentionPriority getAstPriority(Source source, SourceEntry sourceEntry) { if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; if (astIsNeeded(dartEntry)) { return RetentionPriority.MEDIUM; } } return RetentionPriority.LOW; } } /** * Instances of the class `GenerateDartErrorsTask` generate errors and warnings for a single * Dart source. */ class GenerateDartErrorsTask extends AnalysisTask { /** * The source for which errors and warnings are to be produced. */ final Source source; /** * The compilation unit used to resolve the dependencies. */ final CompilationUnit _unit; /** * The element model for the library containing the source. */ final LibraryElement libraryElement; /** * The errors that were generated for the source. */ List<AnalysisError> _errors; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param source the source for which errors and warnings are to be produced * @param unit the compilation unit used to resolve the dependencies * @param libraryElement the element model for the library containing the source */ GenerateDartErrorsTask(InternalAnalysisContext context, this.source, this._unit, this.libraryElement) : super(context); /** * Return the errors that were generated for the source. * * @return the errors that were generated for the source */ List<AnalysisError> get errors => _errors; @override String get taskDescription => "generate errors and warnings for ${source.fullName}"; @override accept(AnalysisTaskVisitor visitor) => visitor.visitGenerateDartErrorsTask(this); @override void internalPerform() { PerformanceStatistics.errors.makeCurrentWhile(() { RecordingErrorListener errorListener = new RecordingErrorListener(); ErrorReporter errorReporter = new ErrorReporter(errorListener, source); TypeProvider typeProvider = context.typeProvider; // // Validate the directives // validateDirectives(context, source, _unit, errorListener); // // Use the ConstantVerifier to verify the use of constants. // This needs to happen before using the ErrorVerifier because some error // codes need the computed constant values. // // TODO(paulberry): as a temporary workaround for issue 21572, // ConstantVerifier is being run right after ConstantValueComputer, so we // don't need to run it here. Once issue 21572 is fixed, re-enable the // call to ConstantVerifier. // ConstantVerifier constantVerifier = new ConstantVerifier(errorReporter, libraryElement, typeProvider); // _unit.accept(constantVerifier); // // Use the ErrorVerifier to compute the rest of the errors. // ErrorVerifier errorVerifier = new ErrorVerifier(errorReporter, libraryElement, typeProvider, new InheritanceManager(libraryElement)); _unit.accept(errorVerifier); _errors = errorListener.getErrorsForSource(source); }); } /** * Check each directive in the given compilation unit to see if the referenced source exists and * report an error if it does not. * * @param context the context in which the library exists * @param librarySource the source representing the library containing the directives * @param unit the compilation unit containing the directives to be validated * @param errorListener the error listener to which errors should be reported */ static void validateDirectives(AnalysisContext context, Source librarySource, CompilationUnit unit, AnalysisErrorListener errorListener) { for (Directive directive in unit.directives) { if (directive is UriBasedDirective) { validateReferencedSource( context, librarySource, directive, errorListener); } } } /** * Check the given directive to see if the referenced source exists and report an error if it does * not. * * @param context the context in which the library exists * @param librarySource the source representing the library containing the directive * @param directive the directive to be verified * @param errorListener the error listener to which errors should be reported */ static void validateReferencedSource(AnalysisContext context, Source librarySource, UriBasedDirective directive, AnalysisErrorListener errorListener) { Source source = directive.source; if (source != null) { if (context.exists(source)) { return; } } else { // Don't report errors already reported by ParseDartTask.resolveDirective if (directive.validate() != null) { return; } } StringLiteral uriLiteral = directive.uri; errorListener.onError(new AnalysisError.con2(librarySource, uriLiteral.offset, uriLiteral.length, CompileTimeErrorCode.URI_DOES_NOT_EXIST, [directive.uriContent])); } } /** * Instances of the class `GenerateDartHintsTask` generate hints for a single Dart library. */ class GenerateDartHintsTask extends AnalysisTask { /** * The compilation units that comprise the library, with the defining compilation unit appearing * first in the list. */ final List<TimestampedData<CompilationUnit>> _units; /** * The element model for the library being analyzed. */ final LibraryElement libraryElement; /** * A table mapping the sources that were analyzed to the hints that were * generated for the sources. */ HashMap<Source, List<AnalysisError>> _hintMap; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param units the compilation units that comprise the library, with the defining compilation * unit appearing first in the list * @param libraryElement the element model for the library being analyzed */ GenerateDartHintsTask( InternalAnalysisContext context, this._units, this.libraryElement) : super(context); /** * Return a table mapping the sources that were analyzed to the hints that were generated for the * sources, or `null` if the task has not been performed or if the analysis did not complete * normally. * * @return a table mapping the sources that were analyzed to the hints that were generated for the * sources */ HashMap<Source, List<AnalysisError>> get hintMap => _hintMap; @override String get taskDescription { Source librarySource = libraryElement.source; if (librarySource == null) { return "generate Dart hints for library without source"; } return "generate Dart hints for ${librarySource.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitGenerateDartHintsTask(this); @override void internalPerform() { // // Gather the compilation units. // int unitCount = _units.length; List<CompilationUnit> compilationUnits = new List<CompilationUnit>(unitCount); for (int i = 0; i < unitCount; i++) { compilationUnits[i] = _units[i].data; } // // Analyze all of the units. // RecordingErrorListener errorListener = new RecordingErrorListener(); HintGenerator hintGenerator = new HintGenerator(compilationUnits, context, errorListener); hintGenerator.generateForLibrary(); // // Store the results. // _hintMap = new HashMap<Source, List<AnalysisError>>(); for (int i = 0; i < unitCount; i++) { Source source = _units[i].data.element.source; _hintMap[source] = errorListener.getErrorsForSource(source); } } } /// Generates lint feedback for a single Dart library. class GenerateDartLintsTask extends AnalysisTask { ///The compilation units that comprise the library, with the defining ///compilation unit appearing first in the list. final List<TimestampedData<CompilationUnit>> _units; /// The element model for the library being analyzed. final LibraryElement libraryElement; /// A mapping of analyzed sources to their associated lint warnings. /// May be [null] if the task has not been performed or if analysis did not /// complete normally. HashMap<Source, List<AnalysisError>> lintMap; /// Initialize a newly created task to perform lint checking over these /// [_units] belonging to this [libraryElement] within the given [context]. GenerateDartLintsTask(context, this._units, this.libraryElement) : super(context); @override String get taskDescription { Source librarySource = libraryElement.source; return (librarySource == null) ? "generate Dart lints for library without source" : "generate Dart lints for ${librarySource.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitGenerateDartLintsTask(this); @override void internalPerform() { Iterable<CompilationUnit> compilationUnits = _units.map((TimestampedData<CompilationUnit> unit) => unit.data); RecordingErrorListener errorListener = new RecordingErrorListener(); LintGenerator lintGenerator = new LintGenerator(compilationUnits, errorListener); lintGenerator.generate(); lintMap = new HashMap<Source, List<AnalysisError>>(); compilationUnits.forEach((CompilationUnit unit) { Source source = unit.element.source; lintMap[source] = errorListener.getErrorsForSource(source); }); } } /** * Instances of the class `GetContentTask` get the contents of a source. */ class GetContentTask extends AnalysisTask { /** * The source to be read. */ final Source source; /** * A flag indicating whether this task is complete. */ bool _complete = false; /** * The contents of the source. */ String _content; /** * The errors that were produced by getting the source content. */ final List<AnalysisError> errors = <AnalysisError>[]; /** * The time at which the contents of the source were last modified. */ int _modificationTime = -1; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param source the source to be parsed * @param contentData the time-stamped contents of the source */ GetContentTask(InternalAnalysisContext context, this.source) : super(context) { if (source == null) { throw new IllegalArgumentException("Cannot get contents of null source"); } } /** * Return the contents of the source, or `null` if the task has not completed or if there * was an exception while getting the contents. * * @return the contents of the source */ String get content => _content; /** * Return `true` if this task is complete. Unlike most tasks, this task is allowed to be * visited more than once in order to support asynchronous IO. If the task is not complete when it * is visited synchronously as part of the [AnalysisTask.perform] * method, it will be visited again, using the same visitor, when the IO operation has been * performed. * * @return `true` if this task is complete */ bool get isComplete => _complete; /** * Return the time at which the contents of the source that was parsed were last modified, or a * negative value if the task has not yet been performed or if an exception occurred. * * @return the time at which the contents of the source that was parsed were last modified */ int get modificationTime => _modificationTime; @override String get taskDescription => "get contents of ${source.fullName}"; @override accept(AnalysisTaskVisitor visitor) => visitor.visitGetContentTask(this); @override void internalPerform() { _complete = true; try { TimestampedData<String> data = context.getContents(source); _content = data.data; _modificationTime = data.modificationTime; AnalysisEngine.instance.instrumentationService.logFileRead( source.fullName, _modificationTime, _content); } catch (exception, stackTrace) { errors.add(new AnalysisError.con1( source, ScannerErrorCode.UNABLE_GET_CONTENT, [exception])); throw new AnalysisException("Could not get contents of $source", new CaughtException(exception, stackTrace)); } } } /** * The information cached by an analysis context about an individual HTML file. */ class HtmlEntry extends SourceEntry { /** * The data descriptor representing the HTML element. */ static final DataDescriptor<HtmlElement> ELEMENT = new DataDescriptor<HtmlElement>("HtmlEntry.ELEMENT"); /** * The data descriptor representing the hints resulting from auditing the * source. */ static final DataDescriptor<List<AnalysisError>> HINTS = new DataDescriptor<List<AnalysisError>>( "HtmlEntry.HINTS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the errors resulting from parsing the * source. */ static final DataDescriptor<List<AnalysisError>> PARSE_ERRORS = new DataDescriptor<List<AnalysisError>>( "HtmlEntry.PARSE_ERRORS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the parsed AST structure. */ static final DataDescriptor<ht.HtmlUnit> PARSED_UNIT = new DataDescriptor<ht.HtmlUnit>("HtmlEntry.PARSED_UNIT"); /** * The data descriptor representing the resolved AST structure. */ static final DataDescriptor<ht.HtmlUnit> RESOLVED_UNIT = new DataDescriptor<ht.HtmlUnit>("HtmlEntry.RESOLVED_UNIT"); /** * The data descriptor representing the list of referenced libraries. */ static final DataDescriptor<List<Source>> REFERENCED_LIBRARIES = new DataDescriptor<List<Source>>( "HtmlEntry.REFERENCED_LIBRARIES", Source.EMPTY_ARRAY); /** * The data descriptor representing the errors resulting from resolving the * source. */ static final DataDescriptor<List<AnalysisError>> RESOLUTION_ERRORS = new DataDescriptor<List<AnalysisError>>( "HtmlEntry.RESOLUTION_ERRORS", AnalysisError.NO_ERRORS); /** * Return all of the errors associated with the HTML file that are currently * cached. */ List<AnalysisError> get allErrors { List<AnalysisError> errors = new List<AnalysisError>(); errors.addAll(super.allErrors); errors.addAll(getValue(PARSE_ERRORS)); errors.addAll(getValue(RESOLUTION_ERRORS)); errors.addAll(getValue(HINTS)); if (errors.length == 0) { return AnalysisError.NO_ERRORS; } return errors; } /** * Return a valid parsed unit, either an unresolved AST structure or the * result of resolving the AST structure, or `null` if there is no parsed unit * available. */ ht.HtmlUnit get anyParsedUnit { if (getState(PARSED_UNIT) == CacheState.VALID) { return getValue(PARSED_UNIT); } if (getState(RESOLVED_UNIT) == CacheState.VALID) { return getValue(RESOLVED_UNIT); } return null; } @override List<DataDescriptor> get descriptors { List<DataDescriptor> result = super.descriptors; result.addAll([ HtmlEntry.ELEMENT, HtmlEntry.PARSE_ERRORS, HtmlEntry.PARSED_UNIT, HtmlEntry.RESOLUTION_ERRORS, HtmlEntry.RESOLVED_UNIT, HtmlEntry.HINTS ]); return result; } @override SourceKind get kind => SourceKind.HTML; /** * Flush any AST structures being maintained by this entry. */ void flushAstStructures() { _flush(PARSED_UNIT); _flush(RESOLVED_UNIT); } @override void invalidateAllInformation() { super.invalidateAllInformation(); setState(PARSE_ERRORS, CacheState.INVALID); setState(PARSED_UNIT, CacheState.INVALID); setState(RESOLVED_UNIT, CacheState.INVALID); invalidateAllResolutionInformation(true); } /** * Invalidate all of the resolution information associated with the HTML file. * If [invalidateUris] is `true`, the cached results of converting URIs to * source files should also be invalidated. */ void invalidateAllResolutionInformation(bool invalidateUris) { setState(RESOLVED_UNIT, CacheState.INVALID); setState(ELEMENT, CacheState.INVALID); setState(RESOLUTION_ERRORS, CacheState.INVALID); setState(HINTS, CacheState.INVALID); if (invalidateUris) { setState(REFERENCED_LIBRARIES, CacheState.INVALID); } } /** * Invalidate all of the parse and resolution information associated with * this source. */ void invalidateParseInformation() { setState(PARSE_ERRORS, CacheState.INVALID); setState(PARSED_UNIT, CacheState.INVALID); invalidateAllResolutionInformation(true); } @override void recordContentError(CaughtException exception) { super.recordContentError(exception); recordParseError(exception); } /** * Record that an [exception] was encountered while attempting to parse the * source associated with this entry. */ void recordParseError(CaughtException exception) { // If the scanning and parsing of HTML are separated, // the following line can be removed. recordScanError(exception); setState(PARSE_ERRORS, CacheState.ERROR); setState(PARSED_UNIT, CacheState.ERROR); setState(REFERENCED_LIBRARIES, CacheState.ERROR); recordResolutionError(exception); } /** * Record that an [exception] was encountered while attempting to resolve the * source associated with this entry. */ void recordResolutionError(CaughtException exception) { this.exception = exception; setState(RESOLVED_UNIT, CacheState.ERROR); setState(ELEMENT, CacheState.ERROR); setState(RESOLUTION_ERRORS, CacheState.ERROR); setState(HINTS, CacheState.ERROR); } @override bool _isValidDescriptor(DataDescriptor descriptor) { return descriptor == ELEMENT || descriptor == HINTS || descriptor == PARSED_UNIT || descriptor == PARSE_ERRORS || descriptor == REFERENCED_LIBRARIES || descriptor == RESOLUTION_ERRORS || descriptor == RESOLVED_UNIT || super._isValidDescriptor(descriptor); } @override bool _writeDiffOn(StringBuffer buffer, SourceEntry oldEntry) { bool needsSeparator = super._writeDiffOn(buffer, oldEntry); if (oldEntry is! HtmlEntry) { if (needsSeparator) { buffer.write("; "); } buffer.write("entry type changed; was "); buffer.write(oldEntry.runtimeType); return true; } needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "parseErrors", HtmlEntry.PARSE_ERRORS, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "parsedUnit", HtmlEntry.PARSED_UNIT, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "resolvedUnit", HtmlEntry.RESOLVED_UNIT, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "resolutionErrors", HtmlEntry.RESOLUTION_ERRORS, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "referencedLibraries", HtmlEntry.REFERENCED_LIBRARIES, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "element", HtmlEntry.ELEMENT, oldEntry); return needsSeparator; } @override void _writeOn(StringBuffer buffer) { buffer.write("Html: "); super._writeOn(buffer); _writeStateOn(buffer, "parseErrors", PARSE_ERRORS); _writeStateOn(buffer, "parsedUnit", PARSED_UNIT); _writeStateOn(buffer, "resolvedUnit", RESOLVED_UNIT); _writeStateOn(buffer, "resolutionErrors", RESOLUTION_ERRORS); _writeStateOn(buffer, "referencedLibraries", REFERENCED_LIBRARIES); _writeStateOn(buffer, "element", ELEMENT); } } /** * Instances of the class `IncrementalAnalysisCache` hold information used to perform * incremental analysis. * * See [AnalysisContextImpl.setChangedContents]. */ class IncrementalAnalysisCache { final Source librarySource; final Source source; final String oldContents; final CompilationUnit resolvedUnit; String _newContents; int _offset = 0; int _oldLength = 0; int _newLength = 0; IncrementalAnalysisCache(this.librarySource, this.source, this.resolvedUnit, this.oldContents, String newContents, int offset, int oldLength, int newLength) { this._newContents = newContents; this._offset = offset; this._oldLength = oldLength; this._newLength = newLength; } /** * Determine if the cache contains source changes that need to be analyzed * * @return `true` if the cache contains changes to be analyzed, else `false` */ bool get hasWork => _oldLength > 0 || _newLength > 0; /** * Return the current contents for the receiver's source. * * @return the contents (not `null`) */ String get newContents => _newContents; /** * Return the number of characters in the replacement text. * * @return the replacement length (zero or greater) */ int get newLength => _newLength; /** * Return the character position of the first changed character. * * @return the offset (zero or greater) */ int get offset => _offset; /** * Return the number of characters that were replaced. * * @return the replaced length (zero or greater) */ int get oldLength => _oldLength; /** * Determine if the incremental analysis result can be cached for the next incremental analysis. * * @param cache the prior incremental analysis cache * @param unit the incrementally updated compilation unit * @return the cache used for incremental analysis or `null` if incremental analysis results * cannot be cached for the next incremental analysis */ static IncrementalAnalysisCache cacheResult( IncrementalAnalysisCache cache, CompilationUnit unit) { if (cache != null && unit != null) { return new IncrementalAnalysisCache(cache.librarySource, cache.source, unit, cache._newContents, cache._newContents, 0, 0, 0); } return null; } /** * Determine if the cache should be cleared. * * @param cache the prior cache or `null` if none * @param source the source being updated (not `null`) * @return the cache used for incremental analysis or `null` if incremental analysis cannot * be performed */ static IncrementalAnalysisCache clear( IncrementalAnalysisCache cache, Source source) { if (cache == null || cache.source == source) { return null; } return cache; } /** * Determine if incremental analysis can be performed from the given information. * * @param cache the prior cache or `null` if none * @param source the source being updated (not `null`) * @param oldContents the original source contents prior to this update (may be `null`) * @param newContents the new contents after this incremental change (not `null`) * @param offset the offset at which the change occurred * @param oldLength the length of the text being replaced * @param newLength the length of the replacement text * @param sourceEntry the cached entry for the given source or `null` if none * @return the cache used for incremental analysis or `null` if incremental analysis cannot * be performed */ static IncrementalAnalysisCache update(IncrementalAnalysisCache cache, Source source, String oldContents, String newContents, int offset, int oldLength, int newLength, SourceEntry sourceEntry) { // Determine the cache resolved unit Source librarySource = null; CompilationUnit unit = null; if (sourceEntry is DartEntry) { DartEntry dartEntry = sourceEntry; List<Source> librarySources = dartEntry.librariesContaining; if (librarySources.length == 1) { librarySource = librarySources[0]; if (librarySource != null) { unit = dartEntry.getValueInLibrary( DartEntry.RESOLVED_UNIT, librarySource); } } } // Create a new cache if there is not an existing cache or the source is // different or a new resolved compilation unit is available. if (cache == null || cache.source != source || unit != null) { if (unit == null) { return null; } if (oldContents == null) { if (oldLength != 0) { return null; } oldContents = "${newContents.substring(0, offset)}${newContents.substring(offset + newLength)}"; } return new IncrementalAnalysisCache(librarySource, source, unit, oldContents, newContents, offset, oldLength, newLength); } // Update the existing cache if the change is contiguous if (cache._oldLength == 0 && cache._newLength == 0) { cache._offset = offset; cache._oldLength = oldLength; cache._newLength = newLength; } else { if (cache._offset > offset || offset > cache._offset + cache._newLength) { return null; } cache._newLength += newLength - oldLength; } cache._newContents = newContents; return cache; } /** * Verify that the incrementally parsed and resolved unit in the incremental cache is structurally * equivalent to the fully parsed unit. * * @param cache the prior cache or `null` if none * @param source the source of the compilation unit that was parsed (not `null`) * @param unit the compilation unit that was just parsed * @return the cache used for incremental analysis or `null` if incremental analysis results * cannot be cached for the next incremental analysis */ static IncrementalAnalysisCache verifyStructure( IncrementalAnalysisCache cache, Source source, CompilationUnit unit) { if (cache != null && unit != null && cache.source == source) { if (!AstComparator.equalNodes(cache.resolvedUnit, unit)) { return null; } } return cache; } } /** * Instances of the class `IncrementalAnalysisTask` incrementally update existing analysis. */ class IncrementalAnalysisTask extends AnalysisTask { /** * The information used to perform incremental analysis. */ final IncrementalAnalysisCache cache; /** * The compilation unit that was produced by incrementally updating the existing unit. */ CompilationUnit _updatedUnit; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param cache the incremental analysis cache used to perform the analysis */ IncrementalAnalysisTask(InternalAnalysisContext context, this.cache) : super(context); /** * Return the compilation unit that was produced by incrementally updating the existing * compilation unit, or `null` if the task has not yet been performed, could not be * performed, or if an exception occurred. * * @return the compilation unit */ CompilationUnit get compilationUnit => _updatedUnit; /** * Return the source that is to be incrementally analyzed. * * @return the source */ Source get source => cache != null ? cache.source : null; @override String get taskDescription => "incremental analysis ${cache != null ? cache.source : "null"}"; /** * Return the type provider used for incremental resolution. * * @return the type provider (or `null` if an exception occurs) */ TypeProvider get typeProvider { try { return context.typeProvider; } on AnalysisException { return null; } } @override accept(AnalysisTaskVisitor visitor) => visitor.visitIncrementalAnalysisTask(this); @override void internalPerform() { if (cache == null) { return; } // Only handle small changes if (cache.oldLength > 0 || cache.newLength > 30) { return; } // Produce an updated token stream CharacterReader reader = new CharSequenceReader(cache.newContents); BooleanErrorListener errorListener = new BooleanErrorListener(); IncrementalScanner scanner = new IncrementalScanner( cache.source, reader, errorListener, context.analysisOptions); scanner.rescan(cache.resolvedUnit.beginToken, cache.offset, cache.oldLength, cache.newLength); if (errorListener.errorReported) { return; } // Produce an updated AST IncrementalParser parser = new IncrementalParser( cache.source, scanner.tokenMap, AnalysisErrorListener.NULL_LISTENER); _updatedUnit = parser.reparse(cache.resolvedUnit, scanner.leftToken, scanner.rightToken, cache.offset, cache.offset + cache.oldLength); // Update the resolution TypeProvider typeProvider = this.typeProvider; if (_updatedUnit != null && typeProvider != null) { CompilationUnitElement element = _updatedUnit.element; if (element != null) { LibraryElement library = element.library; if (library != null) { IncrementalResolver resolver = new IncrementalResolver( element, cache.offset, cache.oldLength, cache.newLength); resolver.resolve(parser.updatedNode); } } } } } /** * Additional behavior for an analysis context that is required by internal * users of the context. */ abstract class InternalAnalysisContext implements AnalysisContext { /** * Allow the client to supply its own content cache. This will take the * place of the content cache created by default, allowing clients to share * the content cache between contexts. */ set contentCache(ContentCache value); /** * Return a list containing all of the sources that have been marked as * priority sources. Clients must not modify the returned list. */ List<Source> get prioritySources; /** * A factory to override how [ResolverVisitor] is created. */ ResolverVisitorFactory get resolverVisitorFactory; /** * Returns a statistics about this context. */ AnalysisContextStatistics get statistics; /** * Sets the [TypeProvider] for this context. */ void set typeProvider(TypeProvider typeProvider); /** * A factory to override how [TypeResolverVisitor] is created. */ TypeResolverVisitorFactory get typeResolverVisitorFactory; /** * A factory to override how [LibraryResolver] is created. */ LibraryResolverFactory get libraryResolverFactory; /** * Add the given [source] with the given [information] to this context. */ void addSourceInfo(Source source, SourceEntry information); /** * Return a list containing the sources of the libraries that are exported by * the library with the given [source]. The list will be empty if the given * source is invalid, if the given source does not represent a library, or if * the library does not export any other libraries. * * Throws an [AnalysisException] if the exported libraries could not be * computed. */ List<Source> computeExportedLibraries(Source source); /** * Return a list containing the sources of the libraries that are imported by * the library with the given [source]. The list will be empty if the given * source is invalid, if the given source does not represent a library, or if * the library does not import any other libraries. * * Throws an [AnalysisException] if the imported libraries could not be * computed. */ List<Source> computeImportedLibraries(Source source); /** * Return an AST structure corresponding to the given [source], but ensure * that the structure has not already been resolved and will not be resolved * by any other threads or in any other library. * * Throws an [AnalysisException] if the analysis could not be performed. * * Note: This method cannot be used in an async environment */ CompilationUnit computeResolvableCompilationUnit(Source source); /** * Return all the resolved [CompilationUnit]s for the given [source] if not * flushed, otherwise return `null` and ensures that the [CompilationUnit]s * will be eventually returned to the client from [performAnalysisTask]. */ List<CompilationUnit> ensureResolvedDartUnits(Source source); /** * Return context that owns the given [source]. */ InternalAnalysisContext getContextFor(Source source); /** * Return a namespace containing mappings for all of the public names defined * by the given [library]. */ Namespace getPublicNamespace(LibraryElement library); /** * Respond to a change which has been made to the given [source] file. * [originalContents] is the former contents of the file, and [newContents] * is the updated contents. If [notify] is true, a source changed event is * triggered. * * Normally it should not be necessary for clients to call this function, * since it will be automatically invoked in response to a call to * [applyChanges] or [setContents]. However, if this analysis context is * sharing its content cache with other contexts, then the client must * manually update the content cache and call this function for each context. * * Return `true` if the change was significant to this context (i.e. [source] * is either implicitly or explicitly analyzed by this context, and a change * actually occurred). */ bool handleContentsChanged( Source source, String originalContents, String newContents, bool notify); /** * Given an [elementMap] mapping the source for the libraries represented by * the corresponding elements to the elements representing the libraries, * record those mappings. */ void recordLibraryElements(Map<Source, LibraryElement> elementMap); /** * Call the given callback function for eache cache item in the context. */ void visitCacheItems(void callback(Source source, SourceEntry dartEntry, DataDescriptor rowDesc, CacheState state)); } /** * An object that can be used to receive information about errors within the * analysis engine. Implementations usually write this information to a file, * but can also record the information for later use (such as during testing) or * even ignore the information. */ abstract class Logger { /** * A logger that ignores all logging. */ static final Logger NULL = new NullLogger(); /** * Log the given message as an error. The [message] is expected to be an * explanation of why the error occurred or what it means. The [exception] is * expected to be the reason for the error. At least one argument must be * provided. */ void logError(String message, [CaughtException exception]); /** * Log the given [exception] as one representing an error. The [message] is an * explanation of why the error occurred or what it means. */ @deprecated void logError2(String message, Object exception); /** * Log the given informational message. The [message] is expected to be an * explanation of why the error occurred or what it means. The [exception] is * expected to be the reason for the error. */ void logInformation(String message, [CaughtException exception]); /** * Log the given [exception] as one representing an informational message. The * [message] is an explanation of why the error occurred or what it means. */ @deprecated void logInformation2(String message, Object exception); } /** * An implementation of [Logger] that does nothing. */ class NullLogger implements Logger { @override void logError(String message, [CaughtException exception]) {} @override void logError2(String message, Object exception) {} @override void logInformation(String message, [CaughtException exception]) {} @override void logInformation2(String message, Object exception) {} } /** * An exception created when an analysis attempt fails because a source was * deleted between the time the analysis started and the time the results of the * analysis were ready to be recorded. */ class ObsoleteSourceAnalysisException extends AnalysisException { /** * The source that was removed while it was being analyzed. */ Source _source; /** * Initialize a newly created exception to represent the removal of the given * [source]. */ ObsoleteSourceAnalysisException(Source source) : super( "The source '${source.fullName}' was removed while it was being analyzed") { this._source = source; } /** * Return the source that was removed while it was being analyzed. */ Source get source => _source; } /** * Instances of the class `ParseDartTask` parse a specific source as a Dart file. */ class ParseDartTask extends AnalysisTask { /** * The source to be parsed. */ final Source source; /** * The head of the token stream used for parsing. */ final Token _tokenStream; /** * The line information associated with the source. */ final LineInfo lineInfo; /** * The compilation unit that was produced by parsing the source. */ CompilationUnit _unit; /** * A flag indicating whether the source contains a 'part of' directive. */ bool _containsPartOfDirective = false; /** * A flag indicating whether the source contains any directive other than a 'part of' directive. */ bool _containsNonPartOfDirective = false; /** * A set containing the sources referenced by 'export' directives. */ HashSet<Source> _exportedSources = new HashSet<Source>(); /** * A set containing the sources referenced by 'import' directives. */ HashSet<Source> _importedSources = new HashSet<Source>(); /** * A set containing the sources referenced by 'part' directives. */ HashSet<Source> _includedSources = new HashSet<Source>(); /** * The errors that were produced by scanning and parsing the source. */ List<AnalysisError> _errors = AnalysisError.NO_ERRORS; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param source the source to be parsed * @param tokenStream the head of the token stream used for parsing * @param lineInfo the line information associated with the source */ ParseDartTask(InternalAnalysisContext context, this.source, this._tokenStream, this.lineInfo) : super(context); /** * Return the compilation unit that was produced by parsing the source, or `null` if the * task has not yet been performed or if an exception occurred. * * @return the compilation unit that was produced by parsing the source */ CompilationUnit get compilationUnit => _unit; /** * Return the errors that were produced by scanning and parsing the source, or an empty list if * the task has not yet been performed or if an exception occurred. * * @return the errors that were produced by scanning and parsing the source */ List<AnalysisError> get errors => _errors; /** * Return a list containing the sources referenced by 'export' directives, or an empty list if * the task has not yet been performed or if an exception occurred. * * @return an list containing the sources referenced by 'export' directives */ List<Source> get exportedSources => _toArray(_exportedSources); /** * Return `true` if the source contains any directive other than a 'part of' directive, or * `false` if the task has not yet been performed or if an exception occurred. * * @return `true` if the source contains any directive other than a 'part of' directive */ bool get hasNonPartOfDirective => _containsNonPartOfDirective; /** * Return `true` if the source contains a 'part of' directive, or `false` if the task * has not yet been performed or if an exception occurred. * * @return `true` if the source contains a 'part of' directive */ bool get hasPartOfDirective => _containsPartOfDirective; /** * Return a list containing the sources referenced by 'import' directives, or an empty list if * the task has not yet been performed or if an exception occurred. * * @return a list containing the sources referenced by 'import' directives */ List<Source> get importedSources => _toArray(_importedSources); /** * Return a list containing the sources referenced by 'part' directives, or an empty list if * the task has not yet been performed or if an exception occurred. * * @return a list containing the sources referenced by 'part' directives */ List<Source> get includedSources => _toArray(_includedSources); @override String get taskDescription { if (source == null) { return "parse as dart null source"; } return "parse as dart ${source.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitParseDartTask(this); @override void internalPerform() { // // Then parse the token stream. // PerformanceStatistics.parse.makeCurrentWhile(() { RecordingErrorListener errorListener = new RecordingErrorListener(); Parser parser = new Parser(source, errorListener); AnalysisOptions options = context.analysisOptions; parser.parseFunctionBodies = options.analyzeFunctionBodiesPredicate(source); _unit = parser.parseCompilationUnit(_tokenStream); _unit.lineInfo = lineInfo; AnalysisContext analysisContext = context; for (Directive directive in _unit.directives) { if (directive is PartOfDirective) { _containsPartOfDirective = true; } else { _containsNonPartOfDirective = true; if (directive is UriBasedDirective) { Source referencedSource = resolveDirective( analysisContext, source, directive, errorListener); if (referencedSource != null) { if (directive is ExportDirective) { _exportedSources.add(referencedSource); } else if (directive is ImportDirective) { _importedSources.add(referencedSource); } else if (directive is PartDirective) { if (referencedSource != source) { _includedSources.add(referencedSource); } } else { throw new AnalysisException( "$runtimeType failed to handle a ${directive.runtimeType}"); } } } } } _errors = errorListener.getErrorsForSource(source); }); } /** * Efficiently convert the given set of [sources] to a list. */ List<Source> _toArray(HashSet<Source> sources) { int size = sources.length; if (size == 0) { return Source.EMPTY_ARRAY; } return new List.from(sources); } /** * Return the result of resolving the URI of the given URI-based directive against the URI of the * given library, or `null` if the URI is not valid. * * @param context the context in which the resolution is to be performed * @param librarySource the source representing the library containing the directive * @param directive the directive which URI should be resolved * @param errorListener the error listener to which errors should be reported * @return the result of resolving the URI against the URI of the library */ static Source resolveDirective(AnalysisContext context, Source librarySource, UriBasedDirective directive, AnalysisErrorListener errorListener) { StringLiteral uriLiteral = directive.uri; String uriContent = uriLiteral.stringValue; if (uriContent != null) { uriContent = uriContent.trim(); directive.uriContent = uriContent; } UriValidationCode code = directive.validate(); if (code == null) { String encodedUriContent = Uri.encodeFull(uriContent); try { Source source = context.sourceFactory.resolveUri(librarySource, encodedUriContent); directive.source = source; return source; } on JavaIOException { code = UriValidationCode.INVALID_URI; } } if (code == UriValidationCode.URI_WITH_DART_EXT_SCHEME) { return null; } if (code == UriValidationCode.URI_WITH_INTERPOLATION) { errorListener.onError(new AnalysisError.con2(librarySource, uriLiteral.offset, uriLiteral.length, CompileTimeErrorCode.URI_WITH_INTERPOLATION)); return null; } if (code == UriValidationCode.INVALID_URI) { errorListener.onError(new AnalysisError.con2(librarySource, uriLiteral.offset, uriLiteral.length, CompileTimeErrorCode.INVALID_URI, [uriContent])); return null; } throw new RuntimeException( message: "Failed to handle validation code: $code"); } } /** * Instances of the class `ParseHtmlTask` parse a specific source as an HTML file. */ class ParseHtmlTask extends AnalysisTask { /** * The name of the 'src' attribute in a HTML tag. */ static String _ATTRIBUTE_SRC = "src"; /** * The name of the 'script' tag in an HTML file. */ static String _TAG_SCRIPT = "script"; /** * The source to be parsed. */ final Source source; /** * The contents of the source. */ final String _content; /** * The line information that was produced. */ LineInfo _lineInfo; /** * The HTML unit that was produced by parsing the source. */ ht.HtmlUnit _unit; /** * The errors that were produced by scanning and parsing the source. */ List<AnalysisError> _errors = AnalysisError.NO_ERRORS; /** * A list containing the sources of the libraries that are referenced within the HTML. */ List<Source> _referencedLibraries = Source.EMPTY_ARRAY; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param source the source to be parsed * @param content the contents of the source */ ParseHtmlTask(InternalAnalysisContext context, this.source, this._content) : super(context); /** * Return the errors that were produced by scanning and parsing the source, or `null` if the * task has not yet been performed or if an exception occurred. * * @return the errors that were produced by scanning and parsing the source */ List<AnalysisError> get errors => _errors; /** * Return the HTML unit that was produced by parsing the source. * * @return the HTML unit that was produced by parsing the source */ ht.HtmlUnit get htmlUnit => _unit; /** * Return the sources of libraries that are referenced in the specified HTML file. * * @return the sources of libraries that are referenced in the HTML file */ List<Source> get librarySources { List<Source> libraries = new List<Source>(); _unit.accept(new ParseHtmlTask_getLibrarySources(this, libraries)); if (libraries.isEmpty) { return Source.EMPTY_ARRAY; } return libraries; } /** * Return the line information that was produced, or `null` if the task has not yet been * performed or if an exception occurred. * * @return the line information that was produced */ LineInfo get lineInfo => _lineInfo; /** * Return a list containing the sources of the libraries that are referenced within the HTML. * * @return the sources of the libraries that are referenced within the HTML */ List<Source> get referencedLibraries => _referencedLibraries; @override String get taskDescription { if (source == null) { return "parse as html null source"; } return "parse as html ${source.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitParseHtmlTask(this); @override void internalPerform() { try { ht.AbstractScanner scanner = new ht.StringScanner(source, _content); scanner.passThroughElements = <String>[_TAG_SCRIPT]; ht.Token token = scanner.tokenize(); _lineInfo = new LineInfo(scanner.lineStarts); RecordingErrorListener errorListener = new RecordingErrorListener(); _unit = new ht.HtmlParser(source, errorListener, context.analysisOptions) .parse(token, _lineInfo); _unit.accept(new RecursiveXmlVisitor_ParseHtmlTask_internalPerform( this, errorListener)); _errors = errorListener.getErrorsForSource(source); _referencedLibraries = librarySources; } catch (exception, stackTrace) { throw new AnalysisException( "Exception", new CaughtException(exception, stackTrace)); } } /** * Resolves directives in the given [CompilationUnit]. */ void _resolveScriptDirectives( CompilationUnit script, AnalysisErrorListener errorListener) { if (script == null) { return; } AnalysisContext analysisContext = context; for (Directive directive in script.directives) { if (directive is UriBasedDirective) { ParseDartTask.resolveDirective( analysisContext, source, directive, errorListener); } } } } class ParseHtmlTask_getLibrarySources extends ht.RecursiveXmlVisitor<Object> { final ParseHtmlTask _task; List<Source> libraries; ParseHtmlTask_getLibrarySources(this._task, this.libraries) : super(); @override Object visitHtmlScriptTagNode(ht.HtmlScriptTagNode node) { ht.XmlAttributeNode scriptAttribute = null; for (ht.XmlAttributeNode attribute in node.attributes) { if (javaStringEqualsIgnoreCase( attribute.name, ParseHtmlTask._ATTRIBUTE_SRC)) { scriptAttribute = attribute; } } if (scriptAttribute != null) { try { Uri uri = Uri.parse(scriptAttribute.text); String fileName = uri.path; Source librarySource = _task.context.sourceFactory.resolveUri(_task.source, fileName); if (_task.context.exists(librarySource)) { libraries.add(librarySource); } } on FormatException { // ignored - invalid URI reported during resolution phase } } return super.visitHtmlScriptTagNode(node); } } /** * An object that manages the partitions that can be shared between analysis * contexts. */ class PartitionManager { /** * The default cache size for a Dart SDK partition. */ static int _DEFAULT_SDK_CACHE_SIZE = 256; /** * A table mapping SDK's to the partitions used for those SDK's. */ HashMap<DartSdk, SdkCachePartition> _sdkPartitions = new HashMap<DartSdk, SdkCachePartition>(); /** * Clear any cached data being maintained by this manager. */ void clearCache() { _sdkPartitions.clear(); } /** * Return the partition being used for the given [sdk], creating the partition * if necessary. */ SdkCachePartition forSdk(DartSdk sdk) { // Call sdk.context now, because when it creates a new // InternalAnalysisContext instance, it calls forSdk() again, so creates an // SdkCachePartition instance. // So, if we initialize context after "partition == null", we end up // with two SdkCachePartition instances. InternalAnalysisContext sdkContext = sdk.context; // Check cache for an existing partition. SdkCachePartition partition = _sdkPartitions[sdk]; if (partition == null) { partition = new SdkCachePartition(sdkContext, _DEFAULT_SDK_CACHE_SIZE); _sdkPartitions[sdk] = partition; } return partition; } } /** * Representation of a pending computation which is based on the results of * analysis that may or may not have been completed. */ class PendingFuture<T> { /** * The context in which this computation runs. */ final AnalysisContextImpl _context; /** * The source used by this computation to compute its value. */ final Source source; /** * The function which implements the computation. */ final PendingFutureComputer<T> _computeValue; /** * The completer that should be completed once the computation has succeeded. */ CancelableCompleter<T> _completer; PendingFuture(this._context, this.source, this._computeValue) { _completer = new CancelableCompleter<T>(_onCancel); } /** * Retrieve the future which will be completed when this object is * successfully evaluated. */ CancelableFuture<T> get future => _completer.future; /** * Execute [_computeValue], passing it the given [sourceEntry], and complete * the pending future if it's appropriate to do so. If the pending future is * completed by this call, true is returned; otherwise false is returned. * * Once this function has returned true, it should not be called again. * * Other than completing the future, this method is free of side effects. * Note that any code the client has attached to the future will be executed * in a microtask, so there is no danger of side effects occurring due to * client callbacks. */ bool evaluate(SourceEntry sourceEntry) { assert(!_completer.isCompleted); try { T result = _computeValue(sourceEntry); if (result == null) { return false; } else { _completer.complete(result); return true; } } catch (exception, stackTrace) { _completer.completeError(exception, stackTrace); return true; } } /** * No further analysis updates are expected which affect this future, so * complete it with an AnalysisNotScheduledError in order to avoid * deadlocking the client. */ void forciblyComplete() { try { throw new AnalysisNotScheduledError(); } catch (exception, stackTrace) { _completer.completeError(exception, stackTrace); } } void _onCancel() { _context._cancelFuture(this); } } /** * Container with global [AnalysisContext] performance statistics. */ class PerformanceStatistics { /** * The [PerformanceTag] for time spent in reading files. */ static PerformanceTag io = new PerformanceTag('io'); /** * The [PerformanceTag] for time spent in scanning. */ static PerformanceTag scan = new PerformanceTag('scan'); /** * The [PerformanceTag] for time spent in parsing. */ static PerformanceTag parse = new PerformanceTag('parse'); /** * The [PerformanceTag] for time spent in resolving. */ static PerformanceTag resolve = new PerformanceTag('resolve'); /** * The [PerformanceTag] for time spent in error verifier. */ static PerformanceTag errors = new PerformanceTag('errors'); /** * The [PerformanceTag] for time spent in hints generator. */ static PerformanceTag hints = new PerformanceTag('hints'); /** * The [PerformanceTag] for time spent in linting. */ static PerformanceTag lint = new PerformanceTag('lint'); /** * The [PerformanceTag] for time spent computing cycles. */ static PerformanceTag cycles = new PerformanceTag('cycles'); /** * The [PerformanceTag] for time spent in other phases of analysis. */ static PerformanceTag performAnaysis = new PerformanceTag('performAnaysis'); /** * The [PerformanceTag] for time spent in the analysis task visitor after * tasks are complete. */ static PerformanceTag analysisTaskVisitor = new PerformanceTag('analysisTaskVisitor'); /** * The [PerformanceTag] for time spent in the getter * AnalysisContextImpl.nextAnalysisTask. */ static var nextTask = new PerformanceTag('nextAnalysisTask'); /** * The [PerformanceTag] for time spent during otherwise not accounted parts * incremental of analysis. */ static PerformanceTag incrementalAnalysis = new PerformanceTag('incrementalAnalysis'); } /** * An error listener that will record the errors that are reported to it in a * way that is appropriate for caching those errors within an analysis context. */ class RecordingErrorListener implements AnalysisErrorListener { /** * A map of sets containing the errors that were collected, keyed by each * source. */ Map<Source, HashSet<AnalysisError>> _errors = new HashMap<Source, HashSet<AnalysisError>>(); /** * Return the errors collected by the listener. */ List<AnalysisError> get errors { int numEntries = _errors.length; if (numEntries == 0) { return AnalysisError.NO_ERRORS; } List<AnalysisError> resultList = new List<AnalysisError>(); for (HashSet<AnalysisError> errors in _errors.values) { resultList.addAll(errors); } return resultList; } /** * Add all of the errors recorded by the given [listener] to this listener. */ void addAll(RecordingErrorListener listener) { for (AnalysisError error in listener.errors) { onError(error); } } /** * Return the errors collected by the listener for the given [source]. */ List<AnalysisError> getErrorsForSource(Source source) { HashSet<AnalysisError> errorsForSource = _errors[source]; if (errorsForSource == null) { return AnalysisError.NO_ERRORS; } else { return new List.from(errorsForSource); } } @override void onError(AnalysisError error) { Source source = error.source; HashSet<AnalysisError> errorsForSource = _errors[source]; if (_errors[source] == null) { errorsForSource = new HashSet<AnalysisError>(); _errors[source] = errorsForSource; } errorsForSource.add(error); } } class RecursiveXmlVisitor_ParseHtmlTask_internalPerform extends ht.RecursiveXmlVisitor<Object> { final ParseHtmlTask ParseHtmlTask_this; RecordingErrorListener errorListener; RecursiveXmlVisitor_ParseHtmlTask_internalPerform( this.ParseHtmlTask_this, this.errorListener) : super(); @override Object visitHtmlScriptTagNode(ht.HtmlScriptTagNode node) { ParseHtmlTask_this._resolveScriptDirectives(node.script, errorListener); return null; } } class RecursiveXmlVisitor_ResolveHtmlTask_internalPerform extends ht.RecursiveXmlVisitor<Object> { final ResolveHtmlTask ResolveHtmlTask_this; RecordingErrorListener errorListener; RecursiveXmlVisitor_ResolveHtmlTask_internalPerform( this.ResolveHtmlTask_this, this.errorListener) : super(); @override Object visitHtmlScriptTagNode(ht.HtmlScriptTagNode node) { CompilationUnit script = node.script; if (script != null) { GenerateDartErrorsTask.validateDirectives(ResolveHtmlTask_this.context, ResolveHtmlTask_this.source, script, errorListener); } return null; } } /** * An visitor that removes any resolution information from an AST structure when * used to visit that structure. */ class ResolutionEraser extends GeneralizingAstVisitor<Object> { @override Object visitAssignmentExpression(AssignmentExpression node) { node.staticElement = null; node.propagatedElement = null; return super.visitAssignmentExpression(node); } @override Object visitBinaryExpression(BinaryExpression node) { node.staticElement = null; node.propagatedElement = null; return super.visitBinaryExpression(node); } @override Object visitBreakStatement(BreakStatement node) { node.target = null; return super.visitBreakStatement(node); } @override Object visitCompilationUnit(CompilationUnit node) { node.element = null; return super.visitCompilationUnit(node); } @override Object visitConstructorDeclaration(ConstructorDeclaration node) { node.element = null; return super.visitConstructorDeclaration(node); } @override Object visitConstructorName(ConstructorName node) { node.staticElement = null; return super.visitConstructorName(node); } @override Object visitContinueStatement(ContinueStatement node) { node.target = null; return super.visitContinueStatement(node); } @override Object visitDirective(Directive node) { node.element = null; return super.visitDirective(node); } @override Object visitExpression(Expression node) { node.staticType = null; node.propagatedType = null; return super.visitExpression(node); } @override Object visitFunctionExpression(FunctionExpression node) { node.element = null; return super.visitFunctionExpression(node); } @override Object visitFunctionExpressionInvocation(FunctionExpressionInvocation node) { node.staticElement = null; node.propagatedElement = null; return super.visitFunctionExpressionInvocation(node); } @override Object visitIndexExpression(IndexExpression node) { node.staticElement = null; node.propagatedElement = null; return super.visitIndexExpression(node); } @override Object visitInstanceCreationExpression(InstanceCreationExpression node) { node.staticElement = null; return super.visitInstanceCreationExpression(node); } @override Object visitPostfixExpression(PostfixExpression node) { node.staticElement = null; node.propagatedElement = null; return super.visitPostfixExpression(node); } @override Object visitPrefixExpression(PrefixExpression node) { node.staticElement = null; node.propagatedElement = null; return super.visitPrefixExpression(node); } @override Object visitRedirectingConstructorInvocation( RedirectingConstructorInvocation node) { node.staticElement = null; return super.visitRedirectingConstructorInvocation(node); } @override Object visitSimpleIdentifier(SimpleIdentifier node) { node.staticElement = null; node.propagatedElement = null; return super.visitSimpleIdentifier(node); } @override Object visitSuperConstructorInvocation(SuperConstructorInvocation node) { node.staticElement = null; return super.visitSuperConstructorInvocation(node); } /** * Remove any resolution information from the given AST structure. */ static void erase(AstNode node) { node.accept(new ResolutionEraser()); } } /** * The information produced by resolving a compilation unit as part of a * specific library. */ class ResolutionState { /** * The next resolution state or `null` if none. */ ResolutionState _nextState; /** * The source for the defining compilation unit of the library that contains * this unit. If this unit is the defining compilation unit for it's library, * then this will be the source for this unit. */ Source _librarySource; /** * A table mapping descriptors to the cached results for those descriptors. * If there is no entry for a given descriptor then the state is implicitly * [CacheState.INVALID] and the value is implicitly the default value. */ Map<DataDescriptor, CachedResult> resultMap = new HashMap<DataDescriptor, CachedResult>(); /** * Flush any AST structures being maintained by this state. */ void flushAstStructures() { _flush(DartEntry.BUILT_UNIT); _flush(DartEntry.RESOLVED_UNIT); if (_nextState != null) { _nextState.flushAstStructures(); } } /** * Return the state of the data represented by the given [descriptor]. */ CacheState getState(DataDescriptor descriptor) { CachedResult result = resultMap[descriptor]; if (result == null) { return CacheState.INVALID; } return result.state; } /** * Return the value of the data represented by the given [descriptor], or * `null` if the data represented by the descriptor is not valid. */ /*<V>*/ dynamic /*V*/ getValue(DataDescriptor /*<V>*/ descriptor) { CachedResult result = resultMap[descriptor]; if (result == null) { return descriptor.defaultValue; } return result.value; } /** * Return `true` if the state of any data value is [CacheState.ERROR]. */ bool hasErrorState() { for (CachedResult result in resultMap.values) { if (result.state == CacheState.ERROR) { return true; } } return false; } /** * Invalidate all of the resolution information associated with the compilation unit. */ void invalidateAllResolutionInformation() { _nextState = null; _librarySource = null; setState(DartEntry.BUILT_UNIT, CacheState.INVALID); setState(DartEntry.BUILT_ELEMENT, CacheState.INVALID); setState(DartEntry.HINTS, CacheState.INVALID); setState(DartEntry.LINTS, CacheState.INVALID); setState(DartEntry.RESOLVED_UNIT, CacheState.INVALID); setState(DartEntry.RESOLUTION_ERRORS, CacheState.INVALID); setState(DartEntry.VERIFICATION_ERRORS, CacheState.INVALID); } /** * Record that an exception occurred while attempting to build the element * model for the source associated with this state. */ void recordBuildElementError() { setState(DartEntry.BUILT_UNIT, CacheState.ERROR); setState(DartEntry.BUILT_ELEMENT, CacheState.ERROR); recordResolutionError(); } /** * Record that an exception occurred while attempting to generate hints for * the source associated with this entry. This will set the state of all * verification information as being in error. */ void recordHintError() { setState(DartEntry.HINTS, CacheState.ERROR); } /** * Record that an exception occurred while attempting to generate lints for * the source associated with this entry. This will set the state of all * verification information as being in error. */ void recordLintError() { setState(DartEntry.LINTS, CacheState.ERROR); } /** * Record that an exception occurred while attempting to resolve the source * associated with this state. */ void recordResolutionError() { setState(DartEntry.RESOLVED_UNIT, CacheState.ERROR); setState(DartEntry.RESOLUTION_ERRORS, CacheState.ERROR); recordVerificationError(); } /** * Record that an exception occurred while attempting to scan or parse the * source associated with this entry. This will set the state of all * resolution-based information as being in error. */ void recordResolutionErrorsInAllLibraries() { recordBuildElementError(); if (_nextState != null) { _nextState.recordResolutionErrorsInAllLibraries(); } } /** * Record that an exception occurred while attempting to generate errors and * warnings for the source associated with this entry. This will set the state * of all verification information as being in error. */ void recordVerificationError() { setState(DartEntry.VERIFICATION_ERRORS, CacheState.ERROR); recordHintError(); } /** * Set the state of the data represented by the given [descriptor] to the * given [state]. */ void setState(DataDescriptor descriptor, CacheState state) { if (state == CacheState.VALID) { throw new ArgumentError("use setValue() to set the state to VALID"); } if (state == CacheState.INVALID) { resultMap.remove(descriptor); } else { CachedResult result = resultMap.putIfAbsent(descriptor, () => new CachedResult(descriptor)); result.state = state; if (state != CacheState.IN_PROCESS) { // // If the state is in-process, we can leave the current value in the // cache for any 'get' methods to access. // result.value = descriptor.defaultValue; } } } /** * Set the value of the data represented by the given [descriptor] to the * given [value]. */ void setValue(DataDescriptor /*<V>*/ descriptor, dynamic /*V*/ value) { CachedResult result = resultMap.putIfAbsent(descriptor, () => new CachedResult(descriptor)); SourceEntry.countTransition(descriptor, result); result.state = CacheState.VALID; result.value = value == null ? descriptor.defaultValue : value; } /** * Flush the value of the data described by the [descriptor]. */ void _flush(DataDescriptor descriptor) { CachedResult result = resultMap[descriptor]; if (result != null && result.state == CacheState.VALID) { result.state = CacheState.FLUSHED; result.value = descriptor.defaultValue; } } /** * Write a textual representation of the difference between the old entry and * this entry to the given string [buffer]. A separator will be written before * the first difference if [needsSeparator] is `true`. The [oldEntry] is the * entry that was replaced by this entry. Return `true` is a separator is * needed before writing any subsequent differences. */ bool _writeDiffOn( StringBuffer buffer, bool needsSeparator, DartEntry oldEntry) { needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "resolvedUnit", DartEntry.RESOLVED_UNIT, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "resolutionErrors", DartEntry.RESOLUTION_ERRORS, oldEntry); needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "verificationErrors", DartEntry.VERIFICATION_ERRORS, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "hints", DartEntry.HINTS, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "lints", DartEntry.LINTS, oldEntry); return needsSeparator; } /** * Write a textual representation of this state to the given [buffer]. The * result will only be used for debugging purposes. */ void _writeOn(StringBuffer buffer) { if (_librarySource != null) { _writeStateOn(buffer, "builtElement", DartEntry.BUILT_ELEMENT); _writeStateOn(buffer, "builtUnit", DartEntry.BUILT_UNIT); _writeStateOn(buffer, "resolvedUnit", DartEntry.RESOLVED_UNIT); _writeStateOn(buffer, "resolutionErrors", DartEntry.RESOLUTION_ERRORS); _writeStateOn( buffer, "verificationErrors", DartEntry.VERIFICATION_ERRORS); _writeStateOn(buffer, "hints", DartEntry.HINTS); _writeStateOn(buffer, "lints", DartEntry.LINTS); if (_nextState != null) { _nextState._writeOn(buffer); } } } /** * Write a textual representation of the difference between the state of the * value described by the given [descriptor] between the [oldEntry] and this * entry to the given [buffer]. Return `true` if some difference was written. */ bool _writeStateDiffOn(StringBuffer buffer, bool needsSeparator, String label, DataDescriptor descriptor, SourceEntry oldEntry) { CacheState oldState = oldEntry.getState(descriptor); CacheState newState = getState(descriptor); if (oldState != newState) { if (needsSeparator) { buffer.write("; "); } buffer.write(label); buffer.write(" = "); buffer.write(oldState); buffer.write(" -> "); buffer.write(newState); return true; } return needsSeparator; } /** * Write a textual representation of the state of the value described by the * given [descriptor] to the given bugger, prefixed by the given [label] to * the given [buffer]. */ void _writeStateOn( StringBuffer buffer, String label, DataDescriptor descriptor) { CachedResult result = resultMap[descriptor]; buffer.write("; "); buffer.write(label); buffer.write(" = "); buffer.write(result == null ? CacheState.INVALID : result.state); } } /** * A compilation unit that is not referenced by any other objects. It is used by * the [LibraryResolver] to resolve a library. */ class ResolvableCompilationUnit { /** * The source of the compilation unit. */ final Source source; /** * The compilation unit. */ final CompilationUnit compilationUnit; /** * Initialize a newly created holder to hold the given [source] and * [compilationUnit]. */ ResolvableCompilationUnit(this.source, this.compilationUnit); } /** * Instances of the class `ResolveDartLibraryTask` resolve a specific Dart library. */ class ResolveDartLibraryCycleTask extends AnalysisTask { /** * The source representing the file whose compilation unit is to be returned. TODO(brianwilkerson) * This should probably be removed, but is being left in for now to ease the transition. */ final Source unitSource; /** * The source representing the library to be resolved. */ final Source librarySource; /** * The libraries that are part of the cycle containing the library to be resolved. */ final List<ResolvableLibrary> _librariesInCycle; /** * The library resolver holding information about the libraries that were resolved. */ LibraryResolver2 _resolver; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param unitSource the source representing the file whose compilation unit is to be returned * @param librarySource the source representing the library to be resolved * @param librariesInCycle the libraries that are part of the cycle containing the library to be * resolved */ ResolveDartLibraryCycleTask(InternalAnalysisContext context, this.unitSource, this.librarySource, this._librariesInCycle) : super(context); /** * Return the library resolver holding information about the libraries that were resolved. * * @return the library resolver holding information about the libraries that were resolved */ LibraryResolver2 get libraryResolver => _resolver; @override String get taskDescription { if (librarySource == null) { return "resolve library null source"; } return "resolve library ${librarySource.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitResolveDartLibraryCycleTask(this); @override void internalPerform() { _resolver = new LibraryResolver2(context); _resolver.resolveLibrary(librarySource, _librariesInCycle); } } /** * Instances of the class `ResolveDartLibraryTask` resolve a specific Dart library. */ class ResolveDartLibraryTask extends AnalysisTask { /** * The source representing the file whose compilation unit is to be returned. */ final Source unitSource; /** * The source representing the library to be resolved. */ final Source librarySource; /** * The library resolver holding information about the libraries that were resolved. */ LibraryResolver _resolver; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param unitSource the source representing the file whose compilation unit is to be returned * @param librarySource the source representing the library to be resolved */ ResolveDartLibraryTask( InternalAnalysisContext context, this.unitSource, this.librarySource) : super(context); /** * Return the library resolver holding information about the libraries that were resolved. * * @return the library resolver holding information about the libraries that were resolved */ LibraryResolver get libraryResolver => _resolver; @override String get taskDescription { if (librarySource == null) { return "resolve library null source"; } return "resolve library ${librarySource.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitResolveDartLibraryTask(this); @override void internalPerform() { LibraryResolverFactory resolverFactory = context.libraryResolverFactory; _resolver = resolverFactory == null ? new LibraryResolver(context) : resolverFactory(context); _resolver.resolveLibrary(librarySource, true); } } /** * Instances of the class `ResolveDartUnitTask` resolve a single Dart file based on a existing * element model. */ class ResolveDartUnitTask extends AnalysisTask { /** * The source that is to be resolved. */ final Source source; /** * The element model for the library containing the source. */ final LibraryElement _libraryElement; /** * The compilation unit that was resolved by this task. */ CompilationUnit _resolvedUnit; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param source the source to be parsed * @param libraryElement the element model for the library containing the source */ ResolveDartUnitTask( InternalAnalysisContext context, this.source, this._libraryElement) : super(context); /** * Return the source for the library containing the source that is to be resolved. * * @return the source for the library containing the source that is to be resolved */ Source get librarySource => _libraryElement.source; /** * Return the compilation unit that was resolved by this task. * * @return the compilation unit that was resolved by this task */ CompilationUnit get resolvedUnit => _resolvedUnit; @override String get taskDescription { Source librarySource = _libraryElement.source; if (librarySource == null) { return "resolve unit null source"; } return "resolve unit ${librarySource.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitResolveDartUnitTask(this); @override void internalPerform() { TypeProvider typeProvider = _libraryElement.context.typeProvider; CompilationUnit unit = context.computeResolvableCompilationUnit(source); if (unit == null) { throw new AnalysisException( "Internal error: computeResolvableCompilationUnit returned a value without a parsed Dart unit"); } // // Resolve names in declarations. // new DeclarationResolver().resolve(unit, _find(_libraryElement, source)); // // Resolve the type names. // RecordingErrorListener errorListener = new RecordingErrorListener(); TypeResolverVisitor typeResolverVisitor = new TypeResolverVisitor.con2( _libraryElement, source, typeProvider, errorListener); unit.accept(typeResolverVisitor); // // Resolve the rest of the structure // InheritanceManager inheritanceManager = new InheritanceManager(_libraryElement); ResolverVisitor resolverVisitor = new ResolverVisitor.con2(_libraryElement, source, typeProvider, inheritanceManager, errorListener); unit.accept(resolverVisitor); // // Perform additional error checking. // PerformanceStatistics.errors.makeCurrentWhile(() { ErrorReporter errorReporter = new ErrorReporter(errorListener, source); ErrorVerifier errorVerifier = new ErrorVerifier( errorReporter, _libraryElement, typeProvider, inheritanceManager); unit.accept(errorVerifier); // TODO(paulberry): as a temporary workaround for issue 21572, // ConstantVerifier is being run right after ConstantValueComputer, so we // don't need to run it here. Once issue 21572 is fixed, re-enable the // call to ConstantVerifier. // ConstantVerifier constantVerifier = new ConstantVerifier(errorReporter, _libraryElement, typeProvider); // unit.accept(constantVerifier); }); // // Capture the results. // _resolvedUnit = unit; } /** * Search the compilation units that are part of the given library and return the element * representing the compilation unit with the given source. Return `null` if there is no * such compilation unit. * * @param libraryElement the element representing the library being searched through * @param unitSource the source for the compilation unit whose element is to be returned * @return the element representing the compilation unit */ CompilationUnitElement _find( LibraryElement libraryElement, Source unitSource) { CompilationUnitElement element = libraryElement.definingCompilationUnit; if (element.source == unitSource) { return element; } for (CompilationUnitElement partElement in libraryElement.parts) { if (partElement.source == unitSource) { return partElement; } } return null; } } /** * Instances of the class `ResolveHtmlTask` resolve a specific source as an HTML file. */ class ResolveHtmlTask extends AnalysisTask { /** * The source to be resolved. */ final Source source; /** * The time at which the contents of the source were last modified. */ final int modificationTime; /** * The HTML unit to be resolved. */ final ht.HtmlUnit _unit; /** * The [HtmlUnit] that was resolved by this task. */ ht.HtmlUnit _resolvedUnit; /** * The element produced by resolving the source. */ HtmlElement _element = null; /** * The resolution errors that were discovered while resolving the source. */ List<AnalysisError> _resolutionErrors = AnalysisError.NO_ERRORS; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param source the source to be resolved * @param modificationTime the time at which the contents of the source were last modified * @param unit the HTML unit to be resolved */ ResolveHtmlTask(InternalAnalysisContext context, this.source, this.modificationTime, this._unit) : super(context); HtmlElement get element => _element; List<AnalysisError> get resolutionErrors => _resolutionErrors; /** * Return the [HtmlUnit] that was resolved by this task. * * @return the [HtmlUnit] that was resolved by this task */ ht.HtmlUnit get resolvedUnit => _resolvedUnit; @override String get taskDescription { if (source == null) { return "resolve as html null source"; } return "resolve as html ${source.fullName}"; } @override accept(AnalysisTaskVisitor visitor) => visitor.visitResolveHtmlTask(this); @override void internalPerform() { // // Build the standard HTML element. // HtmlUnitBuilder builder = new HtmlUnitBuilder(context); _element = builder.buildHtmlElement(source, _unit); RecordingErrorListener errorListener = builder.errorListener; // // Validate the directives // _unit.accept(new RecursiveXmlVisitor_ResolveHtmlTask_internalPerform( this, errorListener)); // // Record all resolution errors. // _resolutionErrors = errorListener.getErrorsForSource(source); // // Remember the resolved unit. // _resolvedUnit = _unit; } } /** * The priority of data in the cache in terms of the desirability of retaining * some specified data about a specified source. */ class RetentionPriority extends Enum<RetentionPriority> { /** * A priority indicating that a given piece of data can be removed from the * cache without reservation. */ static const RetentionPriority LOW = const RetentionPriority('LOW', 0); /** * A priority indicating that a given piece of data should not be removed from * the cache unless there are no sources for which the corresponding data has * a lower priority. Currently used for data that is needed in order to finish * some outstanding analysis task. */ static const RetentionPriority MEDIUM = const RetentionPriority('MEDIUM', 1); /** * A priority indicating that a given piece of data should not be removed from * the cache. Currently used for data related to a priority source. */ static const RetentionPriority HIGH = const RetentionPriority('HIGH', 2); static const List<RetentionPriority> values = const [LOW, MEDIUM, HIGH]; const RetentionPriority(String name, int ordinal) : super(name, ordinal); } /** * Instances of the class `ScanDartTask` scan a specific source as a Dart file. */ class ScanDartTask extends AnalysisTask { /** * The source to be scanned. */ final Source source; /** * The contents of the source. */ final String _content; /** * The token stream that was produced by scanning the source. */ Token _tokenStream; /** * The line information that was produced. */ LineInfo _lineInfo; /** * The errors that were produced by scanning the source. */ List<AnalysisError> _errors = AnalysisError.NO_ERRORS; /** * Initialize a newly created task to perform analysis within the given context. * * @param context the context in which the task is to be performed * @param source the source to be parsed * @param content the contents of the source */ ScanDartTask(InternalAnalysisContext context, this.source, this._content) : super(context); /** * Return the errors that were produced by scanning the source, or `null` if the task has * not yet been performed or if an exception occurred. * * @return the errors that were produced by scanning the source */ List<AnalysisError> get errors => _errors; /** * Return the line information that was produced, or `null` if the task has not yet been * performed or if an exception occurred. * * @return the line information that was produced */ LineInfo get lineInfo => _lineInfo; @override String get taskDescription { if (source == null) { return "scan as dart null source"; } return "scan as dart ${source.fullName}"; } /** * Return the token stream that was produced by scanning the source, or `null` if the task * has not yet been performed or if an exception occurred. * * @return the token stream that was produced by scanning the source */ Token get tokenStream => _tokenStream; @override accept(AnalysisTaskVisitor visitor) => visitor.visitScanDartTask(this); @override void internalPerform() { PerformanceStatistics.scan.makeCurrentWhile(() { RecordingErrorListener errorListener = new RecordingErrorListener(); try { Scanner scanner = new Scanner( source, new CharSequenceReader(_content), errorListener); scanner.preserveComments = context.analysisOptions.preserveComments; scanner.enableNullAwareOperators = context.analysisOptions.enableNullAwareOperators; _tokenStream = scanner.tokenize(); _lineInfo = new LineInfo(scanner.lineStarts); _errors = errorListener.getErrorsForSource(source); } catch (exception, stackTrace) { throw new AnalysisException( "Exception", new CaughtException(exception, stackTrace)); } }); } } /** * An [AnalysisContext] that only contains sources for a Dart SDK. */ class SdkAnalysisContext extends AnalysisContextImpl { @override AnalysisCache createCacheFromSourceFactory(SourceFactory factory) { if (factory == null) { return super.createCacheFromSourceFactory(factory); } DartSdk sdk = factory.dartSdk; if (sdk == null) { throw new IllegalArgumentException( "The source factory for an SDK analysis context must have a DartUriResolver"); } return new AnalysisCache( <CachePartition>[AnalysisEngine.instance.partitionManager.forSdk(sdk)]); } } /** * A cache partition that contains all of the sources in the SDK. */ class SdkCachePartition extends CachePartition { /** * Initialize a newly created partition. The [context] is the context that * owns this partition. The [maxCacheSize] is the maximum number of sources * for which AST structures should be kept in the cache. */ SdkCachePartition(InternalAnalysisContext context, int maxCacheSize) : super(context, maxCacheSize, DefaultRetentionPolicy.POLICY); @override bool contains(Source source) => source.isInSystemLibrary; } /** * The information cached by an analysis context about an individual source, no * matter what kind of source it is. */ abstract class SourceEntry { /** * The data descriptor representing the contents of the source. */ static final DataDescriptor<String> CONTENT = new DataDescriptor<String>("SourceEntry.CONTENT"); /** * The data descriptor representing the errors resulting from reading the * source content. */ static final DataDescriptor<List<AnalysisError>> CONTENT_ERRORS = new DataDescriptor<List<AnalysisError>>( "SourceEntry.CONTENT_ERRORS", AnalysisError.NO_ERRORS); /** * The data descriptor representing the line information. */ static final DataDescriptor<LineInfo> LINE_INFO = new DataDescriptor<LineInfo>("SourceEntry.LINE_INFO"); /** * The index of the flag indicating whether the source was explicitly added to * the context or whether the source was implicitly added because it was * referenced by another source. */ static int _EXPLICITLY_ADDED_FLAG = 0; /** * A table mapping data descriptors to a count of the number of times a value * was set when in a given state. */ static final Map<DataDescriptor, Map<CacheState, int>> transitionMap = new HashMap<DataDescriptor, Map<CacheState, int>>(); /** * The most recent time at which the state of the source matched the state * represented by this entry. */ int modificationTime = 0; /** * The exception that caused one or more values to have a state of * [CacheState.ERROR]. */ CaughtException exception; /** * A bit-encoding of boolean flags associated with this element. */ int _flags = 0; /** * A table mapping data descriptors to the cached results for those * descriptors. */ Map<DataDescriptor, CachedResult> resultMap = new HashMap<DataDescriptor, CachedResult>(); /** * Return all of the errors associated with this entry. */ List<AnalysisError> get allErrors { return getValue(CONTENT_ERRORS); } /** * Get a list of all the library-independent descriptors for which values may * be stored in this SourceEntry. */ List<DataDescriptor> get descriptors { return <DataDescriptor>[CONTENT, CONTENT_ERRORS, LINE_INFO]; } /** * Return `true` if the source was explicitly added to the context or `false` * if the source was implicitly added because it was referenced by another * source. */ bool get explicitlyAdded => _getFlag(_EXPLICITLY_ADDED_FLAG); /** * Set whether the source was explicitly added to the context to match the * [explicitlyAdded] flag. */ void set explicitlyAdded(bool explicitlyAdded) { _setFlag(_EXPLICITLY_ADDED_FLAG, explicitlyAdded); } /** * Return the kind of the source, or `null` if the kind is not currently * cached. */ SourceKind get kind; /** * Fix the state of the [exception] to match the current state of the entry. */ void fixExceptionState() { if (hasErrorState()) { if (exception == null) { // // This code should never be reached, but is a fail-safe in case an // exception is not recorded when it should be. // String message = "State set to ERROR without setting an exception"; exception = new CaughtException(new AnalysisException(message), null); } } else { exception = null; } } /** * Return a textual representation of the difference between the [oldEntry] * and this entry. The difference is represented as a sequence of fields whose * value would change if the old entry were converted into the new entry. */ String getDiff(SourceEntry oldEntry) { StringBuffer buffer = new StringBuffer(); _writeDiffOn(buffer, oldEntry); return buffer.toString(); } /** * Return the state of the data represented by the given [descriptor]. */ CacheState getState(DataDescriptor descriptor) { if (!_isValidDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } CachedResult result = resultMap[descriptor]; if (result == null) { return CacheState.INVALID; } return result.state; } /** * Return the value of the data represented by the given [descriptor], or * `null` if the data represented by the descriptor is not valid. */ /*<V>*/ dynamic /*V*/ getValue(DataDescriptor /*<V>*/ descriptor) { if (!_isValidDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } CachedResult result = resultMap[descriptor]; if (result == null) { return descriptor.defaultValue; } return result.value; } /** * Return `true` if the state of any data value is [CacheState.ERROR]. */ bool hasErrorState() { for (CachedResult result in resultMap.values) { if (result.state == CacheState.ERROR) { return true; } } return false; } /** * Invalidate all of the information associated with this source. */ void invalidateAllInformation() { setState(CONTENT, CacheState.INVALID); setState(CONTENT_ERRORS, CacheState.INVALID); setState(LINE_INFO, CacheState.INVALID); } /** * Record that an [exception] occurred while attempting to get the contents of * the source represented by this entry. This will set the state of all * information, including any resolution-based information, as being in error. */ void recordContentError(CaughtException exception) { setState(CONTENT, CacheState.ERROR); recordScanError(exception); } /** * Record that an [exception] occurred while attempting to scan or parse the * entry represented by this entry. This will set the state of all * information, including any resolution-based information, as being in error. */ void recordScanError(CaughtException exception) { this.exception = exception; setState(LINE_INFO, CacheState.ERROR); } /** * Set the state of the data represented by the given [descriptor] to the * given [state]. */ void setState(DataDescriptor descriptor, CacheState state) { if (!_isValidDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } if (state == CacheState.VALID) { throw new ArgumentError("use setValue() to set the state to VALID"); } _validateStateChange(descriptor, state); if (state == CacheState.INVALID) { resultMap.remove(descriptor); } else { CachedResult result = resultMap.putIfAbsent(descriptor, () => new CachedResult(descriptor)); result.state = state; if (state != CacheState.IN_PROCESS) { // // If the state is in-process, we can leave the current value in the // cache for any 'get' methods to access. // result.value = descriptor.defaultValue; } } } /** * Set the value of the data represented by the given [descriptor] to the * given [value]. */ void setValue(DataDescriptor /*<V>*/ descriptor, dynamic /*V*/ value) { if (!_isValidDescriptor(descriptor)) { throw new ArgumentError("Invalid descriptor: $descriptor"); } _validateStateChange(descriptor, CacheState.VALID); CachedResult result = resultMap.putIfAbsent(descriptor, () => new CachedResult(descriptor)); countTransition(descriptor, result); result.state = CacheState.VALID; result.value = value == null ? descriptor.defaultValue : value; } @override String toString() { StringBuffer buffer = new StringBuffer(); _writeOn(buffer); return buffer.toString(); } /** * Flush the value of the data described by the [descriptor]. */ void _flush(DataDescriptor descriptor) { CachedResult result = resultMap[descriptor]; if (result != null && result.state == CacheState.VALID) { _validateStateChange(descriptor, CacheState.FLUSHED); result.state = CacheState.FLUSHED; result.value = descriptor.defaultValue; } } /** * Return the value of the flag with the given [index]. */ bool _getFlag(int index) => BooleanArray.get(_flags, index); /** * Return `true` if the [descriptor] is valid for this entry. */ bool _isValidDescriptor(DataDescriptor descriptor) { return descriptor == CONTENT || descriptor == CONTENT_ERRORS || descriptor == LINE_INFO; } /** * Set the value of the flag with the given [index] to the given [value]. */ void _setFlag(int index, bool value) { _flags = BooleanArray.set(_flags, index, value); } /** * If the state of the value described by the given [descriptor] is changing * from ERROR to anything else, capture the information. This is an attempt to * discover the underlying cause of a long-standing bug. */ void _validateStateChange(DataDescriptor descriptor, CacheState newState) { // TODO(brianwilkerson) Decide whether we still want to capture this data. // if (descriptor != CONTENT) { // return; // } // CachedResult result = resultMap[CONTENT]; // if (result != null && result.state == CacheState.ERROR) { // String message = // "contentState changing from ${result.state} to $newState"; // InstrumentationBuilder builder = // Instrumentation.builder2("SourceEntry-validateStateChange"); // builder.data3("message", message); // //builder.data("source", source.getFullName()); // builder.record(new CaughtException(new AnalysisException(message), null)); // builder.log(); // } } /** * Write a textual representation of the difference between the [oldEntry] and * this entry to the given string [buffer]. Return `true` if some difference * was written. */ bool _writeDiffOn(StringBuffer buffer, SourceEntry oldEntry) { bool needsSeparator = false; CaughtException oldException = oldEntry.exception; if (!identical(oldException, exception)) { buffer.write("exception = "); buffer.write(oldException.runtimeType); buffer.write(" -> "); buffer.write(exception.runtimeType); needsSeparator = true; } int oldModificationTime = oldEntry.modificationTime; if (oldModificationTime != modificationTime) { if (needsSeparator) { buffer.write("; "); } buffer.write("time = "); buffer.write(oldModificationTime); buffer.write(" -> "); buffer.write(modificationTime); needsSeparator = true; } needsSeparator = _writeStateDiffOn(buffer, needsSeparator, "content", CONTENT, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "contentErrors", CONTENT_ERRORS, oldEntry); needsSeparator = _writeStateDiffOn( buffer, needsSeparator, "lineInfo", LINE_INFO, oldEntry); return needsSeparator; } /** * Write a textual representation of this entry to the given [buffer]. The * result should only be used for debugging purposes. */ void _writeOn(StringBuffer buffer) { buffer.write("time = "); buffer.write(modificationTime); _writeStateOn(buffer, "content", CONTENT); _writeStateOn(buffer, "contentErrors", CONTENT_ERRORS); _writeStateOn(buffer, "lineInfo", LINE_INFO); } /** * Write a textual representation of the difference between the state of the * value described by the given [descriptor] between the [oldEntry] and this * entry to the given [buffer]. Return `true` if some difference was written. */ bool _writeStateDiffOn(StringBuffer buffer, bool needsSeparator, String label, DataDescriptor descriptor, SourceEntry oldEntry) { CacheState oldState = oldEntry.getState(descriptor); CacheState newState = getState(descriptor); if (oldState != newState) { if (needsSeparator) { buffer.write("; "); } buffer.write(label); buffer.write(" = "); buffer.write(oldState); buffer.write(" -> "); buffer.write(newState); return true; } return needsSeparator; } /** * Write a textual representation of the state of the value described by the * given [descriptor] to the given bugger, prefixed by the given [label] to * the given [buffer]. */ void _writeStateOn( StringBuffer buffer, String label, DataDescriptor descriptor) { CachedResult result = resultMap[descriptor]; buffer.write("; "); buffer.write(label); buffer.write(" = "); buffer.write(result == null ? CacheState.INVALID : result.state); } /** * Increment the count of the number of times that data represented by the * given [descriptor] was transitioned from the current state (as found in the * given [result] to a valid state. */ static void countTransition(DataDescriptor descriptor, CachedResult result) { Map<CacheState, int> countMap = transitionMap.putIfAbsent( descriptor, () => new HashMap<CacheState, int>()); int count = countMap[result.state]; countMap[result.state] = count == null ? 1 : count + 1; } } /** * The priority levels used to return sources in an optimal order. A smaller * ordinal value equates to a higher priority. */ class SourcePriority extends Enum<SourcePriority> { /** * Used for a Dart source that is known to be a part contained in a library * that was recently resolved. These parts are given a higher priority because * there is a high probability that their AST structure is still in the cache * and therefore would not need to be re-created. */ static const SourcePriority PRIORITY_PART = const SourcePriority('PRIORITY_PART', 0); /** * Used for a Dart source that is known to be a library. */ static const SourcePriority LIBRARY = const SourcePriority('LIBRARY', 1); /** * Used for a Dart source whose kind is unknown. */ static const SourcePriority UNKNOWN = const SourcePriority('UNKNOWN', 2); /** * Used for a Dart source that is known to be a part but whose library has not * yet been resolved. */ static const SourcePriority NORMAL_PART = const SourcePriority('NORMAL_PART', 3); /** * Used for an HTML source. */ static const SourcePriority HTML = const SourcePriority('HTML', 4); static const List<SourcePriority> values = const [ PRIORITY_PART, LIBRARY, UNKNOWN, NORMAL_PART, HTML ]; const SourcePriority(String name, int ordinal) : super(name, ordinal); } /** * [SourcesChangedEvent] indicates which sources have been added, removed, * or whose contents have changed. */ class SourcesChangedEvent { /** * The internal representation of what has changed. Clients should not access * this field directly. */ final ChangeSet _changeSet; /** * Construct an instance representing the given changes. */ SourcesChangedEvent(ChangeSet changeSet) : _changeSet = changeSet; /** * Construct an instance representing a source content change. */ factory SourcesChangedEvent.changedContent(Source source, String contents) { ChangeSet changeSet = new ChangeSet(); changeSet.changedContent(source, contents); return new SourcesChangedEvent(changeSet); } /** * Construct an instance representing a source content change. */ factory SourcesChangedEvent.changedRange(Source source, String contents, int offset, int oldLength, int newLength) { ChangeSet changeSet = new ChangeSet(); changeSet.changedRange(source, contents, offset, oldLength, newLength); return new SourcesChangedEvent(changeSet); } /** * Return the collection of sources for which content has changed. */ Iterable<Source> get changedSources { List<Source> changedSources = new List.from(_changeSet.changedSources); changedSources.addAll(_changeSet.changedContents.keys); changedSources.addAll(_changeSet.changedRanges.keys); return changedSources; } /** * Return `true` if any sources were added. */ bool get wereSourcesAdded => _changeSet.addedSources.length > 0; /** * Return `true` if any sources were removed or deleted. */ bool get wereSourcesRemovedOrDeleted => _changeSet.removedSources.length > 0 || _changeSet.removedContainers.length > 0 || _changeSet.deletedSources.length > 0; } /** * Analysis data for which we have a modification time. */ class TimestampedData<E> { /** * The modification time of the source from which the data was created. */ final int modificationTime; /** * The data that was created from the source. */ final E data; /** * Initialize a newly created holder to associate the given [data] with the * given [modificationTime]. */ TimestampedData(this.modificationTime, this.data); } /** * A cache partition that contains all sources not contained in other * partitions. */ class UniversalCachePartition extends CachePartition { /** * Initialize a newly created partition. The [context] is the context that * owns this partition. The [maxCacheSize] is the maximum number of sources * for which AST structures should be kept in the cache. The [retentionPolicy] * is the policy used to determine which pieces of data to remove from the * cache. */ UniversalCachePartition(InternalAnalysisContext context, int maxCacheSize, CacheRetentionPolicy retentionPolicy) : super(context, maxCacheSize, retentionPolicy); @override bool contains(Source source) => true; } /** * The unique instances of the class `WaitForAsyncTask` represents a state in which there is * no analysis work that can be done until some asynchronous task (such as IO) has completed, but * where analysis is not yet complete. */ class WaitForAsyncTask extends AnalysisTask { /** * The unique instance of this class. */ static WaitForAsyncTask _UniqueInstance = new WaitForAsyncTask(); /** * Return the unique instance of this class. * * @return the unique instance of this class */ static WaitForAsyncTask get instance => _UniqueInstance; /** * Prevent the creation of instances of this class. */ WaitForAsyncTask() : super(null); @override String get taskDescription => "Waiting for async analysis"; @override accept(AnalysisTaskVisitor visitor) => null; @override void internalPerform() { // There is no work to be done. } } /** * An object that manages a list of sources that need to have analysis work * performed on them. */ class WorkManager { /** * A list containing the various queues is priority order. */ List<List<Source>> _workQueues; /** * Initialize a newly created manager to have no work queued up. */ WorkManager() { int queueCount = SourcePriority.values.length; _workQueues = new List<List>(queueCount); for (int i = 0; i < queueCount; i++) { _workQueues[i] = new List<Source>(); } } /** * Record that the given [source] needs to be analyzed. The [priority] level * is used to control when the source will be analyzed with respect to other * sources. If the source was previously added then it's priority is updated. * If it was previously added with the same priority then it's position in the * queue is unchanged. */ void add(Source source, SourcePriority priority) { int queueCount = _workQueues.length; int ordinal = priority.ordinal; for (int i = 0; i < queueCount; i++) { List<Source> queue = _workQueues[i]; if (i == ordinal) { if (!queue.contains(source)) { queue.add(source); } } else { queue.remove(source); } } } /** * Record that the given [source] needs to be analyzed. The [priority] level * is used to control when the source will be analyzed with respect to other * sources. If the source was previously added then it's priority is updated. * In either case, it will be analyzed before other sources of the same * priority. */ void addFirst(Source source, SourcePriority priority) { int queueCount = _workQueues.length; int ordinal = priority.ordinal; for (int i = 0; i < queueCount; i++) { List<Source> queue = _workQueues[i]; if (i == ordinal) { queue.remove(source); queue.insert(0, source); } else { queue.remove(source); } } } /** * Return an iterator that can be used to access the sources to be analyzed in * the order in which they should be analyzed. * * Note: As with other iterators, no sources can be added or removed * from this work manager while the iterator is being used. Unlike some * implementations, however, the iterator will not detect when this * requirement has been violated; it might work correctly, it might return the * wrong source, or it might throw an exception. */ WorkManager_WorkIterator iterator() => new WorkManager_WorkIterator(this); /** * Record that the given source is fully analyzed. */ void remove(Source source) { int queueCount = _workQueues.length; for (int i = 0; i < queueCount; i++) { _workQueues[i].remove(source); } } @override String toString() { StringBuffer buffer = new StringBuffer(); List<SourcePriority> priorities = SourcePriority.values; bool needsSeparator = false; int queueCount = _workQueues.length; for (int i = 0; i < queueCount; i++) { List<Source> queue = _workQueues[i]; if (!queue.isEmpty) { if (needsSeparator) { buffer.write("; "); } buffer.write(priorities[i]); buffer.write(": "); int queueSize = queue.length; for (int j = 0; j < queueSize; j++) { if (j > 0) { buffer.write(", "); } buffer.write(queue[j].fullName); } needsSeparator = true; } } return buffer.toString(); } } /** * An iterator that returns the sources in a work manager in the order in which * they are to be analyzed. */ class WorkManager_WorkIterator { final WorkManager _manager; /** * The index of the work queue through which we are currently iterating. */ int _queueIndex = 0; /** * The index of the next element of the work queue to be returned. */ int _index = -1; /** * Initialize a newly created iterator to be ready to return the first element * in the iteration. */ WorkManager_WorkIterator(this._manager) { _advance(); } /** * Return `true` if there is another [Source] available for processing. */ bool get hasNext => _queueIndex < _manager._workQueues.length; /** * Return the next [Source] available for processing and advance so that the * returned source will not be returned again. */ Source next() { if (!hasNext) { throw new NoSuchElementException(); } Source source = _manager._workQueues[_queueIndex][_index]; _advance(); return source; } /** * Increment the [index] and [queueIndex] so that they are either indicating * the next source to be returned or are indicating that there are no more * sources to be returned. */ void _advance() { _index++; if (_index >= _manager._workQueues[_queueIndex].length) { _index = 0; _queueIndex++; while (_queueIndex < _manager._workQueues.length && _manager._workQueues[_queueIndex].isEmpty) { _queueIndex++; } } } } /** * A helper class used to create futures for AnalysisContextImpl. Using a helper * class allows us to preserve the generic parameter T. */ class _AnalysisFutureHelper<T> { final AnalysisContextImpl _context; _AnalysisFutureHelper(this._context); /** * Return a future that will be completed with the result of calling * [computeValue]. If [computeValue] returns non-null, the future will be * completed immediately with the resulting value. If it returns null, then * it will be re-executed in the future, after the next time the cached * information for [source] has changed. If [computeValue] throws an * exception, the future will fail with that exception. * * If the [computeValue] still returns null after there is no further * analysis to be done for [source], then the future will be completed with * the error AnalysisNotScheduledError. * * Since [computeValue] will be called while the state of analysis is being * updated, it should be free of side effects so that it doesn't cause * reentrant changes to the analysis state. */ CancelableFuture<T> computeAsync( Source source, T computeValue(SourceEntry sourceEntry)) { if (_context.isDisposed) { // No further analysis is expected, so return a future that completes // immediately with AnalysisNotScheduledError. return new CancelableFuture.error(new AnalysisNotScheduledError()); } SourceEntry sourceEntry = _context.getReadableSourceEntryOrNull(source); if (sourceEntry == null) { return new CancelableFuture.error(new AnalysisNotScheduledError()); } PendingFuture pendingFuture = new PendingFuture<T>(_context, source, computeValue); if (!pendingFuture.evaluate(sourceEntry)) { _context._pendingFutureSources .putIfAbsent(source, () => <PendingFuture>[]) .add(pendingFuture); } return pendingFuture.future; } } class _ElementByIdFinder extends GeneralizingElementVisitor { final int _id; Element result; _ElementByIdFinder(this._id); @override visitElement(Element element) { if (element.id == _id) { result = element; throw new _ElementByIdFinderException(); } super.visitElement(element); } } class _ElementByIdFinderException {}