Import analysis_services.dart into analysis_server.dart.

pkg/analysis_services/lib/src/completion/dart_completion_manager.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.
-
-library test.services.completion.dart;
-
-import 'dart:async';
-
-import 'package:analysis_services/completion/completion_manager.dart';
-import 'package:analysis_services/completion/completion_suggestion.dart';
-import 'package:analysis_services/search/search_engine.dart';
-import 'package:analysis_services/src/completion/imported_type_computer.dart';
-import 'package:analysis_services/src/completion/invocation_computer.dart';
-import 'package:analysis_services/src/completion/keyword_computer.dart';
-import 'package:analysis_services/src/completion/local_computer.dart';
-import 'package:analyzer/src/generated/ast.dart';
-import 'package:analyzer/src/generated/element.dart';
-import 'package:analyzer/src/generated/engine.dart';
-import 'package:analyzer/src/generated/source.dart';
-
-/**
- * The base class for computing code completion suggestions.
- */
-abstract class DartCompletionComputer {
-  /**
-   * Computes the initial set of [CompletionSuggestion]s based on
-   * the given completion context. The compilation unit and completion node
-   * in the given completion context may not be resolved.
-   * This method should execute quickly and not block waiting for any analysis.
-   * Returns `true` if the computer's work is complete
-   * or `false` if [computeFull] should be called to complete the work.
-   */
-  bool computeFast(DartCompletionRequest request);
-
-  /**
-   * Computes the complete set of [CompletionSuggestion]s based on
-   * the given completion context.  The compilation unit and completion node
-   * in the given completion context are resolved.
-   * Returns `true` if the receiver modified the list of suggestions.
-   */
-  Future<bool> computeFull(DartCompletionRequest request);
-}
-
-/**
- * Manages code completion for a given Dart file completion request.
- */
-class DartCompletionManager extends CompletionManager {
-  final AnalysisContext context;
-  final Source source;
-  final int offset;
-  DartCompletionRequest request;
-  List<DartCompletionComputer> computers;
-
-  DartCompletionManager(this.context, SearchEngine searchEngine, this.source,
-      this.offset) {
-    request = new DartCompletionRequest(context, searchEngine, source, offset);
-  }
-
-  @override
-  void compute() {
-    initComputers();
-    computeFast();
-    if (!computers.isEmpty) {
-      computeFull();
-    }
-  }
-
-  /**
-   * Compute suggestions based upon cached information only
-   * then send an initial response to the client.
-   */
-  void computeFast() {
-    CompilationUnit unit = context.parseCompilationUnit(source);
-    request.unit = unit;
-    request.node = new NodeLocator.con1(offset).searchWithin(unit);
-    computers.removeWhere((DartCompletionComputer c) => c.computeFast(request));
-    sendResults(computers.isEmpty);
-  }
-
-  /**
-   * If there is remaining work to be done, then wait for the unit to be
-   * resolved and request that each remaining computer finish their work.
-   */
-  void computeFull() {
-    waitForAnalysis().then((CompilationUnit unit) {
-      if (unit == null) {
-        sendResults(true);
-        return;
-      }
-      request.unit = unit;
-      request.node = new NodeLocator.con1(offset).searchWithin(unit);
-      int count = computers.length;
-      computers.forEach((c) {
-        c.computeFull(request).then((bool changed) {
-          var last = --count == 0;
-          if (changed || last) {
-            sendResults(last);
-          }
-        });
-      });
-    });
-  }
-
-  /**
-   * Build and initialize the list of completion computers
-   */
-  void initComputers() {
-    if (computers == null) {
-      computers = [
-          new KeywordComputer(),
-          new LocalComputer(),
-          new ImportedTypeComputer(),
-          new InvocationComputer()];
-    }
-  }
-
-  /**
-   * Send the current list of suggestions to the client.
-   */
-  void sendResults(bool last) {
-    controller.add(
-        new CompletionResult(request.offset, 0, request.suggestions, last));
-    if (last) {
-      controller.close();
-    }
-  }
-
-  /**
-   * Return a future that completes when analysis is complete.
-   * Return `true` if the compilation unit is be resolved.
-   */
-  Future<CompilationUnit> waitForAnalysis() {
-    LibraryElement library = context.getLibraryElement(source);
-    if (library != null) {
-      CompilationUnit unit =
-          context.getResolvedCompilationUnit(source, library);
-      if (unit != null) {
-        return new Future.value(unit);
-      }
-    }
-    //TODO (danrubel) Determine if analysis is complete but unit not resolved
-    return new Future(waitForAnalysis);
-  }
-}
-
-/**
- * The context in which the completion is requested.
- */
-class DartCompletionRequest {
-  /**
-   * The analysis context in which the completion is requested.
-   */
-  final AnalysisContext context;
-
-  /**
-   * The search engine for use when building suggestions.
-   */
-  final SearchEngine searchEngine;
-
-  /**
-   * The source in which the completion is requested.
-   */
-  final Source source;
-
-  /**
-   * The offset within the source at which the completion is requested.
-   */
-  final int offset;
-
-  /**
-   * The compilation unit in which the completion was requested. This unit
-   * may or may not be resolved when [DartCompletionComputer.computeFast]
-   * is called but is resolved when [DartCompletionComputer.computeFull].
-   */
-  CompilationUnit unit;
-
-  /**
-   * The node in which the completion occurred. This node
-   * may or may not be resolved when [DartCompletionComputer.computeFast]
-   * is called but is resolved when [DartCompletionComputer.computeFull].
-   */
-  AstNode node;
-
-  /**
-   * The list of suggestions to be sent to the client.
-   */
-  final List<CompletionSuggestion> suggestions = [];
-
-  DartCompletionRequest(this.context, this.searchEngine, this.source,
-      this.offset);
-}