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| 1 // Copyright (c) 2014, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 library computer.overrides; |
| 6 |
| 7 import 'package:analysis_server/src/computer/element.dart'; |
| 8 import 'package:analysis_server/src/constants.dart'; |
| 9 import 'package:analyzer/src/generated/ast.dart'; |
| 10 import 'package:analyzer/src/generated/element.dart' as engine; |
| 11 |
| 12 |
| 13 /** |
| 14 * A computer for class member overrides in a Dart [CompilationUnit]. |
| 15 */ |
| 16 class DartUnitOverridesComputer { |
| 17 final CompilationUnit _unit; |
| 18 |
| 19 final List<Override> _overrides = <Override>[]; |
| 20 engine.ClassElement _currentClass; |
| 21 |
| 22 DartUnitOverridesComputer(this._unit); |
| 23 |
| 24 /** |
| 25 * Returns the computed occurrences, not `null`. |
| 26 */ |
| 27 List<Map<String, Object>> compute() { |
| 28 for (CompilationUnitMember unitMember in _unit.declarations) { |
| 29 if (unitMember is ClassDeclaration) { |
| 30 _currentClass = unitMember.element; |
| 31 for (ClassMember classMember in unitMember.members) { |
| 32 if (classMember is MethodDeclaration) { |
| 33 SimpleIdentifier nameNode = classMember.name; |
| 34 _addOverride(nameNode.offset, nameNode.length, nameNode.name); |
| 35 } |
| 36 if (classMember is FieldDeclaration) { |
| 37 List<VariableDeclaration> fields = classMember.fields.variables; |
| 38 for (VariableDeclaration field in fields) { |
| 39 SimpleIdentifier nameNode = field.name; |
| 40 _addOverride(nameNode.offset, nameNode.length, nameNode.name); |
| 41 } |
| 42 } |
| 43 } |
| 44 } |
| 45 } |
| 46 return _overrides.map((override) => override.toJson()).toList(); |
| 47 } |
| 48 |
| 49 void _addOverride(int offset, int length, String name) { |
| 50 // super |
| 51 engine.Element superEngineElement; |
| 52 { |
| 53 engine.InterfaceType superType = _currentClass.supertype; |
| 54 if (superType != null) { |
| 55 superEngineElement = _lookupMember(superType.element, name); |
| 56 } |
| 57 } |
| 58 // interfaces |
| 59 List<engine.Element> interfaceEngineElements = <engine.Element>[]; |
| 60 for (engine.InterfaceType interfaceType in _currentClass.interfaces) { |
| 61 engine.ClassElement interfaceElement = interfaceType.element; |
| 62 engine.Element interfaceMember = _lookupMember(interfaceElement, name); |
| 63 if (interfaceMember != null) { |
| 64 interfaceEngineElements.add(interfaceMember); |
| 65 } |
| 66 } |
| 67 // is there any override? |
| 68 if (superEngineElement != null || interfaceEngineElements.isNotEmpty) { |
| 69 Element superElement = superEngineElement != null ? |
| 70 new Element.fromEngine(superEngineElement) : null; |
| 71 List<Element> interfaceElements = interfaceEngineElements.map( |
| 72 (engineElement) { |
| 73 return new Element.fromEngine(engineElement); |
| 74 }).toList(); |
| 75 _overrides.add(new Override(offset, length, superElement, |
| 76 interfaceElements)); |
| 77 } |
| 78 } |
| 79 |
| 80 static engine.Element _lookupMember(engine.ClassElement classElement, |
| 81 String name) { |
| 82 if (classElement == null) { |
| 83 return null; |
| 84 } |
| 85 engine.LibraryElement library = classElement.library; |
| 86 // method |
| 87 engine.Element member = classElement.lookUpMethod(name, library); |
| 88 if (member != null) { |
| 89 return member; |
| 90 } |
| 91 // getter |
| 92 member = classElement.lookUpGetter(name, library); |
| 93 if (member != null) { |
| 94 return member; |
| 95 } |
| 96 // setter |
| 97 member = classElement.lookUpSetter(name + '=', library); |
| 98 if (member != null) { |
| 99 return member; |
| 100 } |
| 101 // not found |
| 102 return null; |
| 103 } |
| 104 } |
| 105 |
| 106 |
| 107 class Override { |
| 108 final int offset; |
| 109 final int length; |
| 110 final Element superclassElement; |
| 111 final List<Element> interfaceElements; |
| 112 |
| 113 Override(this.offset, this.length, this.superclassElement, |
| 114 this.interfaceElements); |
| 115 |
| 116 factory Override.fromJson(Map<String, Object> map) { |
| 117 int offset = map[OFFSET]; |
| 118 int length = map[LENGTH]; |
| 119 // super |
| 120 Element superclassElement = null; |
| 121 { |
| 122 Map<String, Object> superJson = map[SUPER_CLASS_ELEMENT]; |
| 123 if (superJson != null) { |
| 124 superclassElement = new Element.fromJson(superJson); |
| 125 } |
| 126 } |
| 127 // interfaces |
| 128 List<Element> interfaceElements = null; |
| 129 { |
| 130 List<Map<String, Object>> jsonList = map[INTERFACE_ELEMENTS]; |
| 131 if (jsonList != null) { |
| 132 interfaceElements = <Element>[]; |
| 133 for (Map<String, Object> json in jsonList) { |
| 134 interfaceElements.add(new Element.fromJson(json)); |
| 135 } |
| 136 } |
| 137 } |
| 138 // done |
| 139 return new Override(offset, length, superclassElement, interfaceElements); |
| 140 } |
| 141 |
| 142 Map<String, Object> toJson() { |
| 143 Map<String, Object> json = <String, Object>{}; |
| 144 json[OFFSET] = offset; |
| 145 json[LENGTH] = length; |
| 146 if (superclassElement != null) { |
| 147 json[SUPER_CLASS_ELEMENT] = superclassElement.toJson(); |
| 148 } |
| 149 if (interfaceElements != null && interfaceElements.isNotEmpty) { |
| 150 json[INTERFACE_ELEMENTS] = interfaceElements.map((element) { |
| 151 return element.toJson(); |
| 152 }).toList(); |
| 153 } |
| 154 return json; |
| 155 } |
| 156 |
| 157 @override |
| 158 String toString() => toJson().toString(); |
| 159 } |
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