Add _embedder.yaml support to analyzer and analysis_server

pkg/analysis_server/lib/src/analysis_server.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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 import 'dart:core' hide Resource;
 import 'dart:math' show max;
 
 import 'package:analysis_server/plugin/analysis/analyzed_files.dart';
 import 'package:analysis_server/plugin/analysis/resolver_provider.dart';
 import 'package:analysis_server/plugin/protocol/protocol.dart' hide Element;
 import 'package:analysis_server/src/analysis_logger.dart';
 import 'package:analysis_server/src/channel/channel.dart';
 import 'package:analysis_server/src/context_manager.dart';
 import 'package:analysis_server/src/operation/operation.dart';
 import 'package:analysis_server/src/operation/operation_analysis.dart';
 import 'package:analysis_server/src/operation/operation_queue.dart';
 import 'package:analysis_server/src/plugin/server_plugin.dart';
 import 'package:analysis_server/src/services/correction/namespace.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/instrumentation/instrumentation.dart';
+import 'package:analyzer/source/embedder.dart';
 import 'package:analyzer/source/pub_package_map_provider.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/java_engine.dart';
 import 'package:analyzer/src/generated/java_io.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/utilities_general.dart';
@@ skipping 1480 matching lines @@
   }
 
   void _computingPackageMap(bool computing) {
     if (analysisServer.serverServices.contains(ServerService.STATUS)) {
       PubStatus pubStatus = new PubStatus(computing);
       ServerStatusParams params = new ServerStatusParams(pub: pubStatus);
       analysisServer.sendNotification(params.toNotification());
     }
   }
 
+  /// Returns true if the list of [resolvers] contains a [EmbedderUriResolver]
+  /// with at least one url mapping.
+  static bool _useEmbedderUriResolver(List<UriResolver> resolvers) {
+    for (UriResolver resolver in resolvers) {
+      if (resolver is EmbedderUriResolver) {
+        if (resolver.length > 0) {
+          return true;
+        }
+      }
+    }
+    return false;
+  }
+
   /**
    * Set up a [SourceFactory] that resolves packages as appropriate for the
    * given [disposition].
    */
   SourceFactory _createSourceFactory(FolderDisposition disposition) {
-    UriResolver dartResolver = new DartUriResolver(analysisServer.defaultSdk);
-    UriResolver resourceResolver = new ResourceUriResolver(resourceProvider);
     List<UriResolver> resolvers = [];
-    resolvers.add(dartResolver);
-    resolvers.addAll(disposition.createPackageUriResolvers(resourceProvider));
-    resolvers.add(resourceResolver);
+    List<UriResolver> packageUriResolvers =
+        disposition.createPackageUriResolvers(resourceProvider);
+    if (!_useEmbedderUriResolver(packageUriResolvers)) {
+      // If we aren't using the embedder uri resolver for dart: libraries,
+      // insert the default Dart SDK uri resolver.
+      resolvers.add(new DartUriResolver(analysisServer.defaultSdk));
+    }
+    resolvers.addAll(packageUriResolvers);
+    resolvers.add(new ResourceUriResolver(resourceProvider));
     return new SourceFactory(resolvers, disposition.packages);
   }
 }
 
 /**
  * A class used by [AnalysisServer] to record performance information
  * such as request latency.
  */
 class ServerPerformance {
   /**
@@ skipping 85 matching lines @@
   /**
    * The [PerformanceTag] for time spent in server request handlers.
    */
   static PerformanceTag serverRequests = new PerformanceTag('serverRequests');
 
   /**
    * The [PerformanceTag] for time spent in split store microtasks.
    */
   static PerformanceTag splitStore = new PerformanceTag('splitStore');
 }