Initial implementation of copy/paste support

pkg/analysis_server/lib/src/domain_analysis.dart

Index: pkg/analysis_server/lib/src/domain_analysis.dart
diff --git a/pkg/analysis_server/lib/src/domain_analysis.dart b/pkg/analysis_server/lib/src/domain_analysis.dart
index eb75faacdb19bf845e022a1e7a51a6cba44a99f1..3af1c06cc7b4107d457e1f9a620d0ec38dacd1df 100644
--- a/pkg/analysis_server/lib/src/domain_analysis.dart
+++ b/pkg/analysis_server/lib/src/domain_analysis.dart
@@ -9,6 +9,7 @@ import 'package:analysis_server/plugin/analysis/analysis_domain.dart';
 import 'package:analysis_server/protocol/protocol_constants.dart';
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/computer_hover.dart';
+import 'package:analysis_server/src/computer/imported_elements_computer.dart';
 import 'package:analysis_server/src/domain_abstract.dart';
 import 'package:analysis_server/src/domains/analysis/navigation.dart';
 import 'package:analysis_server/src/domains/analysis/navigation_dart.dart';
@@ -100,6 +101,32 @@ class AnalysisDomainHandler extends AbstractRequestHandler {
   }
 
   /**
+   * Implement the `analysis.getImportedElements` request.
+   */
+  Future<Null> getImportedElements(Request request) async {
+    AnalysisGetImportedElementsParams params =
+        new AnalysisGetImportedElementsParams.fromRequest(request);
+    //
+    // Prepare the resolved unit.
+    //
+    AnalysisResult result = await server.getAnalysisResult(params.file);
+    if (result == null) {
+      server.sendResponse(new Response.getImportedElementsInvalidFile(request));
+    }
+    //
+    // Compute the list of imported elements.
+    //
+    List<ImportedElements> elements =
+        new ImportedElementsComputer(result.unit, params.offset, params.length)
+            .compute();
+    //
+    // Send the response.
+    //
+    server.sendResponse(
+        new AnalysisGetImportedElementsResult(elements).toResponse(request.id));
+  }
+
+  /**
    * Implement the `analysis.getLibraryDependencies` request.
    */
   Response getLibraryDependencies(Request request) {
@@ -216,6 +243,9 @@ class AnalysisDomainHandler extends AbstractRequestHandler {
       } else if (requestName == ANALYSIS_REQUEST_GET_HOVER) {
         getHover(request);
         return Response.DELAYED_RESPONSE;
+      } else if (requestName == ANALYSIS_REQUEST_GET_IMPORTED_ELEMENTS) {
+        getImportedElements(request);
+        return Response.DELAYED_RESPONSE;
       } else if (requestName == ANALYSIS_REQUEST_GET_LIBRARY_DEPENDENCIES) {
         return getLibraryDependencies(request);
       } else if (requestName == ANALYSIS_REQUEST_GET_NAVIGATION) {