Implementation for 'analysis.getHover'.

pkg/analysis_server/lib/src/domain_analysis.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 domain.analysis;
 
 import 'dart:collection';
 
-import 'package:analyzer/src/generated/engine.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/constants.dart';
 import 'package:analysis_server/src/protocol.dart';
+import 'package:analyzer/src/generated/engine.dart';
+import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer/src/generated/ast.dart';
+import 'package:analysis_server/src/computer/computer_hover.dart';
 
 /**
  * Instances of the class [AnalysisDomainHandler] implement a [RequestHandler]
  * that handles requests in the `analysis` domain.
  */
 class AnalysisDomainHandler implements RequestHandler {
   /**
    * The analysis server that is using this handler to process requests.
    */
   final AnalysisServer server;
 
   /**
    * Initialize a newly created handler to handle requests for the given [server].
    */
   AnalysisDomainHandler(this.server);
 
+  /**
+   * Implement the `analysis.getHover` request.
+   */
+  Response getAnalysisHover(Request request) {
+    // prepare parameters
+    String file = request.getRequiredParameter(FILE).asString();
+    int offset = request.getRequiredParameter(OFFSET).asInt();
+    // prepare hovers
+    List<Map<String, Object>> hovers = <Map<String, Object>>[];
+    {
+      Source source = server.getSource(file);
+      AnalysisContext context = server.getAnalysisContext(file);
+      List<Source> librarySources = context.getLibrariesContaining(source);
+      for (Source librarySource in librarySources) {
+        CompilationUnit unit = context.resolveCompilationUnit2(source,
+            librarySource);
+        hovers.add(new DartUnitHoverComputer(unit, offset).compute());
+      }
+    }
+    // send response
+    Response response = new Response(request.id);
+    response.setResult(HOVERS, hovers);
+    return response;
+  }
+
   @override
   Response handleRequest(Request request) {
     try {
       String requestName = request.method;
-      if (requestName == ANALYSIS_SET_ANALYSIS_ROOTS) {
+      if (requestName == ANALYSIS_GET_HOVER) {
+        return getAnalysisHover(request);
+      } else if (requestName == ANALYSIS_SET_ANALYSIS_ROOTS) {
         return setAnalysisRoots(request);
       } else if (requestName == ANALYSIS_SET_PRIORITY_FILES) {
         return setPriorityFiles(request);
       } else if (requestName == ANALYSIS_SET_SUBSCRIPTIONS) {
         return setSubscriptions(request);
       } else if (requestName == ANALYSIS_UPDATE_CONTENT) {
         return updateContent(request);
       } else if (requestName == ANALYSIS_UPDATE_OPTIONS) {
         return updateOptions(request);
       } else if (requestName == ANALYSIS_UPDATE_SDKS) {
@@ skipping 151 matching lines @@
 
 /**
  * A description of the change to the content of a file.
  */
 class ContentChange {
   String content;
   int offset;
   int oldLength;
   int newLength;
 }