remove unused DartCompletionCache

pkg/analysis_server/lib/src/services/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 services.completion.dart;
 
 import 'dart:async';
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/provisional/completion/completion_core.dart'
     show AnalysisRequest, CompletionContributor, CompletionRequest;
 import 'package:analysis_server/src/provisional/completion/dart/completion_target.dart';
 import 'package:analysis_server/src/services/completion/completion_core.dart';
 import 'package:analysis_server/src/services/completion/completion_manager.dart';
 import 'package:analysis_server/src/services/completion/dart/common_usage_sorter.dart';
 import 'package:analysis_server/src/services/completion/dart/contribution_sorter.dart';
-import 'package:analysis_server/src/services/completion/dart_completion_cache.dart';
 import 'package:analysis_server/src/services/completion/optype.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/engine.dart';
 import 'package:analyzer/src/generated/scanner.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 export 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart'
     show
@@ skipping 42 matching lines @@
  */
 class DartCompletionManager extends CompletionManager {
   /**
    * The [defaultContributionSorter] is a long-lived object that isn't allowed
    * to maintain state between calls to [ContributionSorter#sort(...)].
    */
   static DartContributionSorter defaultContributionSorter =
       new CommonUsageSorter();
 
   final SearchEngine searchEngine;
-  final DartCompletionCache cache;
   List<DartCompletionContributor> contributors;
   Iterable<CompletionContributor> newContributors;
   DartContributionSorter contributionSorter;
 
   DartCompletionManager(
-      AnalysisContext context, this.searchEngine, Source source, this.cache,
+      AnalysisContext context, this.searchEngine, Source source,
       [this.contributors, this.newContributors, this.contributionSorter])
       : super(context, source) {
     if (contributors == null) {
       contributors = [
         // LocalReferenceContributor before ImportedReferenceContributor
         // because local suggestions take precedence
         // and can hide other suggestions with the same name
         //new LocalReferenceContributor(),
         //new ImportedReferenceContributor(),
         //new KeywordContributor(),
@@ skipping 15 matching lines @@
   }
 
   /**
    * Create a new initialized Dart source completion manager
    */
   factory DartCompletionManager.create(
       AnalysisContext context,
       SearchEngine searchEngine,
       Source source,
       Iterable<CompletionContributor> newContributors) {
-    return new DartCompletionManager(context, searchEngine, source,
-        new DartCompletionCache(context, source), null, newContributors);
-  }
-
-  @override
-  Future<bool> computeCache() {
-    return waitForAnalysis().then((CompilationUnit unit) {
-      if (unit != null && !cache.isImportInfoCached(unit)) {
-        return cache.computeImportInfo(unit, searchEngine, true);
-      } else {
-        return new Future.value(false);
-      }
-    });
+    return new DartCompletionManager(
+        context, searchEngine, source, null, newContributors);
   }
 
   /**
    * Compute suggestions based upon cached information only
    * then send an initial response to the client.
    * Return a list of contributors for which [computeFull] should be called
    */
   List<DartCompletionContributor> computeFast(
       DartCompletionRequest request, CompletionPerformance performance) {
     return performance.logElapseTime('computeFast', () {
@@ skipping 97 matching lines @@
             });
           });
         });
       });
     });
   }
 
   @override
   void computeSuggestions(CompletionRequest completionRequest) {
     DartCompletionRequest request =
-        new DartCompletionRequest.from(completionRequest, cache);
+        new DartCompletionRequest.from(completionRequest);
     CompletionPerformance performance = new CompletionPerformance();
     performance.logElapseTime('compute', () {
       List<DartCompletionContributor> todo = computeFast(request, performance);
       computeFull(request, performance, todo);
     });
   }
 
   /**
    * Send the current list of suggestions to the client.
    */
@@ skipping 29 matching lines @@
       return null;
     }, test: (e) => e is AnalysisNotScheduledError);
   }
 }
 
 /**
  * The context in which the completion is requested.
  */
 class DartCompletionRequest extends CompletionRequestImpl {
   /**
-   * Cached information from a prior code completion operation.
-   */
-  final DartCompletionCache cache;
-
-  /**
    * The compilation unit in which the completion was requested. This unit
    * may or may not be resolved when [DartCompletionContributor.computeFast]
    * is called but is resolved when [DartCompletionContributor.computeFull].
    */
   CompilationUnit unit;
 
   /**
    * The completion target.  This determines what part of the parse tree
    * will receive the newly inserted text.
    */
@@ skipping 28 matching lines @@
   /**
    * The set of completions used to prevent duplicates
    */
   final Set<String> _completions = new Set<String>();
 
   DartCompletionRequest(
       AnalysisContext context,
       ResourceProvider resourceProvider,
       SearchEngine searchEngine,
       Source source,
-      int offset,
-      this.cache)
+      int offset)
       : super(context, resourceProvider, searchEngine, source, offset);
 
-  factory DartCompletionRequest.from(
-          CompletionRequestImpl request, DartCompletionCache cache) =>
+  factory DartCompletionRequest.from(CompletionRequestImpl request) =>
       new DartCompletionRequest(request.context, request.resourceProvider,
-          request.searchEngine, request.source, request.offset, cache);
+          request.searchEngine, request.source, request.offset);
 
   /**
    * Return the original text from the [replacementOffset] to the [offset]
    * that can be used to filter the suggestions on the server side.
    */
   String get filterText {
     return context
         .getContents(source)
         .data
         .substring(replacementOffset, offset);
@@ skipping 105 matching lines @@
               // Replacement range for import URI
               return new ReplacementRange(start, end - start);
             }
           }
         }
       }
     }
     return new ReplacementRange(requestOffset, 0);
   }
 }