Split computers.dart and use parsed JSON objects for navigation tests.

pkg/analysis_server/lib/src/computer/computer_highlights.dart

Index: pkg/analysis_server/lib/src/computer/computer_highlights.dart
diff --git a/pkg/analysis_server/lib/src/computers.dart b/pkg/analysis_server/lib/src/computer/computer_highlights.dart
similarity index 75%
rename from pkg/analysis_server/lib/src/computers.dart
rename to pkg/analysis_server/lib/src/computer/computer_highlights.dart
index f7d11c6f1ecd4b9f4e07f4e37d714f228b3f79bd..06a3db494ed9eaa380d2cc591fa12631b20a90c8 100644
--- a/pkg/analysis_server/lib/src/computers.dart
+++ b/pkg/analysis_server/lib/src/computer/computer_highlights.dart
@@ -2,12 +2,11 @@
 // 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 computers;
+library computer.highlights;
 
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/scanner.dart';
-import 'package:analyzer/src/generated/source.dart';
 
 
 /**
@@ -516,201 +515,3 @@ class HighlightType {
 
   const HighlightType(this.name);
 }
-
-
-/**
- * A computer for navigation regions in a Dart [CompilationUnit].
- */
-class DartUnitNavigationComputer {
-  final CompilationUnit _unit;
-
-  List<Map<String, Object>> _regions = [];
-
-  DartUnitNavigationComputer(this._unit);
-
-  /**
-   * Returns the computed navigation regions, not `null`.
-   */
-  List<Map<String, Object>> compute() {
-    _unit.accept(new _DartUnitNavigationComputerVisitor(this));
-    return new List.from(_regions);
-  }
-
-  void _addRegion(int offset, int length, Element element) {
-    Map<String, Object> target = _createTarget(element);
-    if (target == null) {
-      return;
-    }
-    _regions.add({
-      'offset': offset,
-      'length': length,
-      'targets': [target]
-    });
-  }
-
-  void _addRegion_nodeStart_nodeEnd(AstNode a, AstNode b, Element element) {
-    int offset = a.offset;
-    int length = b.end - offset;
-    _addRegion(offset, length, element);
-  }
-
-  void _addRegion_nodeStart_nodeStart(AstNode a, AstNode b, Element element) {
-    int offset = a.offset;
-    int length = b.offset - offset;
-    _addRegion(offset, length, element);
-  }
-
-  void _addRegion_tokenStart_nodeEnd(Token a, AstNode b, Element element) {
-    int offset = a.offset;
-    int length = b.end - offset;
-    _addRegion(offset, length, element);
-  }
-
-  void _addRegionForNode(AstNode node, Element element) {
-    int offset = node.offset;
-    int length = node.length;
-    _addRegion(offset, length, element);
-  }
-
-  void _addRegionForToken(Token token, Element element) {
-    int offset = token.offset;
-    int length = token.length;
-    _addRegion(offset, length, element);
-  }
-
-  /**
-   * Returns the JSON for the given [Element], maybe `null` if `null` was given.
-   */
-  Map<String, Object> _createTarget(Element element) {
-    if (element == null) {
-      return null;
-    }
-    if (element is FieldFormalParameterElement) {
-      element = (element as FieldFormalParameterElement).field;
-    }
-    // prepare Source
-    Source source = element.source;
-    if (source == null) {
-      return null;
-    }
-    // prepare location
-    int offset = element.nameOffset;
-    int length = element.displayName.length;
-    if (element is CompilationUnitElement) {
-      offset = 0;
-      length = 0;
-    }
-    // return as JSON
-    return {
-      'file': source.fullName,
-      'offset': offset,
-      'length': length,
-      'elementId': element.location.encoding
-    };
-  }
-}
-
-
-
-class _DartUnitNavigationComputerVisitor extends RecursiveAstVisitor {
-  final DartUnitNavigationComputer computer;
-
-  _DartUnitNavigationComputerVisitor(this.computer);
-
-  @override
-  visitAssignmentExpression(AssignmentExpression node) {
-    computer._addRegionForToken(node.operator, node.bestElement);
-    return super.visitAssignmentExpression(node);
-  }
-
-  @override
-  visitBinaryExpression(BinaryExpression node) {
-    computer._addRegionForToken(node.operator, node.bestElement);
-    return super.visitBinaryExpression(node);
-  }
-
-  @override
-  visitConstructorDeclaration(ConstructorDeclaration node) {
-    // associate constructor with "T" or "T.name"
-    {
-      AstNode firstNode = node.returnType;
-      AstNode lastNode = node.name;
-      if (lastNode == null) {
-        lastNode = firstNode;
-      }
-      if (firstNode != null && lastNode != null) {
-        computer._addRegion_nodeStart_nodeEnd(firstNode, lastNode, node.element);
-      }
-    }
-    return super.visitConstructorDeclaration(node);
-  }
-
-  @override
-  visitExportDirective(ExportDirective node) {
-    ExportElement exportElement = node.element;
-    if (exportElement != null) {
-      Element element = exportElement.exportedLibrary;
-      computer._addRegion_tokenStart_nodeEnd(node.keyword, node.uri, element);
-    }
-    return super.visitExportDirective(node);
-  }
-
-  @override
-  visitImportDirective(ImportDirective node) {
-    ImportElement importElement = node.element;
-    if (importElement != null) {
-      Element element = importElement.importedLibrary;
-      computer._addRegion_tokenStart_nodeEnd(node.keyword, node.uri, element);
-    }
-    return super.visitImportDirective(node);
-  }
-
-  @override
-  visitIndexExpression(IndexExpression node) {
-    computer._addRegionForToken(node.rightBracket, node.bestElement);
-    return super.visitIndexExpression(node);
-  }
-
-  @override
-  visitInstanceCreationExpression(InstanceCreationExpression node) {
-    Element element = node.staticElement;
-    if (element != null && element.isSynthetic) {
-      element = element.enclosingElement;
-    }
-    computer._addRegion_nodeStart_nodeStart(node, node.argumentList, element);
-    return super.visitInstanceCreationExpression(node);
-  }
-
-  @override
-  visitPartDirective(PartDirective node) {
-    computer._addRegion_tokenStart_nodeEnd(node.keyword, node.uri, node.element);
-    return super.visitPartDirective(node);
-  }
-
-  @override
-  visitPartOfDirective(PartOfDirective node) {
-    computer._addRegion_tokenStart_nodeEnd(node.keyword, node.libraryName, node.element);
-    return super.visitPartOfDirective(node);
-  }
-
-  @override
-  visitPostfixExpression(PostfixExpression node) {
-    computer._addRegionForToken(node.operator, node.bestElement);
-    return super.visitPostfixExpression(node);
-  }
-
-  @override
-  visitPrefixExpression(PrefixExpression node) {
-    computer._addRegionForToken(node.operator, node.bestElement);
-    return super.visitPrefixExpression(node);
-  }
-
-  @override
-  visitSimpleIdentifier(SimpleIdentifier node) {
-    if (node.parent is ConstructorDeclaration) {
-    } else {
-      computer._addRegionForNode(node, node.bestElement);
-    }
-    return super.visitSimpleIdentifier(node);
-  }
-}