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| 1 // Copyright (c) 2012, 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 dart2js.mirrors; | |
| 6 | |
| 7 import 'dart:collection' show UnmodifiableListView, UnmodifiableMapView; | |
| 8 | |
| 9 import '../constants/expressions.dart'; | |
| 10 import '../constants/values.dart'; | |
| 11 import '../elements/elements.dart'; | |
| 12 import '../scanner/scannerlib.dart'; | |
| 13 import '../resolution/resolution.dart' show Scope; | |
| 14 import '../dart2jslib.dart'; | |
| 15 import '../dart_types.dart'; | |
| 16 import '../tree/tree.dart'; | |
| 17 import '../util/util.dart' | |
| 18 show Link, | |
| 19 LinkBuilder; | |
| 20 import '../util/characters.dart' show $CR, $LF; | |
| 21 | |
| 22 import 'source_mirrors.dart'; | |
| 23 import 'mirrors_util.dart'; | |
| 24 | |
| 25 part 'dart2js_library_mirror.dart'; | |
| 26 part 'dart2js_type_mirrors.dart'; | |
| 27 part 'dart2js_member_mirrors.dart'; | |
| 28 part 'dart2js_instance_mirrors.dart'; | |
| 29 | |
| 30 //------------------------------------------------------------------------------ | |
| 31 // Utility types and functions for the dart2js mirror system | |
| 32 //------------------------------------------------------------------------------ | |
| 33 | |
| 34 bool _includeLibrary(Dart2JsLibraryMirror mirror) { | |
| 35 return const bool.fromEnvironment("list_all_libraries") || | |
| 36 !mirror._element.isInternalLibrary; | |
| 37 } | |
| 38 | |
| 39 bool _isPrivate(String name) { | |
| 40 return name.startsWith('_'); | |
| 41 } | |
| 42 | |
| 43 List<ParameterMirror> _parametersFromFunctionSignature( | |
| 44 Dart2JsDeclarationMirror owner, | |
| 45 FunctionSignature signature) { | |
| 46 var parameters = <ParameterMirror>[]; | |
| 47 Link<Element> link = signature.requiredParameters; | |
| 48 while (!link.isEmpty) { | |
| 49 parameters.add(new Dart2JsParameterMirror( | |
| 50 owner, link.head, isOptional: false, isNamed: false)); | |
| 51 link = link.tail; | |
| 52 } | |
| 53 link = signature.optionalParameters; | |
| 54 bool isNamed = signature.optionalParametersAreNamed; | |
| 55 while (!link.isEmpty) { | |
| 56 parameters.add(new Dart2JsParameterMirror( | |
| 57 owner, link.head, isOptional: true, isNamed: isNamed)); | |
| 58 link = link.tail; | |
| 59 } | |
| 60 return parameters; | |
| 61 } | |
| 62 | |
| 63 MethodMirror _convertElementMethodToMethodMirror( | |
| 64 Dart2JsDeclarationMirror library, Element element) { | |
| 65 if (element is FunctionElement) { | |
| 66 return new Dart2JsMethodMirror(library, element); | |
| 67 } else { | |
| 68 return null; | |
| 69 } | |
| 70 } | |
| 71 | |
| 72 //------------------------------------------------------------------------------ | |
| 73 // Dart2Js specific extensions of mirror interfaces | |
| 74 //------------------------------------------------------------------------------ | |
| 75 | |
| 76 abstract class Dart2JsMirror implements Mirror { | |
| 77 Dart2JsMirrorSystem get mirrorSystem; | |
| 78 } | |
| 79 | |
| 80 abstract class Dart2JsDeclarationMirror extends Dart2JsMirror | |
| 81 implements DeclarationSourceMirror { | |
| 82 | |
| 83 bool get isTopLevel => owner != null && owner is LibraryMirror; | |
| 84 | |
| 85 bool get isPrivate => _isPrivate(_simpleNameString); | |
| 86 | |
| 87 String get _simpleNameString; | |
| 88 | |
| 89 String get _qualifiedNameString { | |
| 90 var parent = owner; | |
| 91 if (parent is Dart2JsDeclarationMirror) { | |
| 92 return '${parent._qualifiedNameString}.${_simpleNameString}'; | |
| 93 } | |
| 94 assert(parent == null); | |
| 95 return _simpleNameString; | |
| 96 } | |
| 97 | |
| 98 Symbol get simpleName => symbolOf(_simpleNameString, getLibrary(this)); | |
| 99 | |
| 100 Symbol get qualifiedName => symbolOf(_qualifiedNameString, getLibrary(this)); | |
| 101 | |
| 102 DeclarationMirror lookupInScope(String name) => null; | |
| 103 | |
| 104 bool get isNameSynthetic => false; | |
| 105 | |
| 106 /// Returns the type mirror for [type] in the context of this declaration. | |
| 107 TypeMirror _getTypeMirror(DartType type) { | |
| 108 return mirrorSystem._convertTypeToTypeMirror(type); | |
| 109 } | |
| 110 | |
| 111 /// Returns a list of the declaration mirrorSystem for [element]. | |
| 112 Iterable<Dart2JsMemberMirror> _getDeclarationMirrors(Element element) { | |
| 113 if (element.isSynthesized) { | |
| 114 return const <Dart2JsMemberMirror>[]; | |
| 115 } else if (element is VariableElement) { | |
| 116 return <Dart2JsMemberMirror>[new Dart2JsFieldMirror(this, element)]; | |
| 117 } else if (element is FunctionElement) { | |
| 118 return <Dart2JsMemberMirror>[new Dart2JsMethodMirror(this, element)]; | |
| 119 } else if (element is AbstractFieldElement) { | |
| 120 var members = <Dart2JsMemberMirror>[]; | |
| 121 AbstractFieldElement field = element; | |
| 122 if (field.getter != null) { | |
| 123 members.add(new Dart2JsMethodMirror(this, field.getter)); | |
| 124 } | |
| 125 if (field.setter != null) { | |
| 126 members.add(new Dart2JsMethodMirror(this, field.setter)); | |
| 127 } | |
| 128 return members; | |
| 129 } | |
| 130 mirrorSystem.compiler.internalError(element, | |
| 131 "Unexpected member type $element ${element.kind}."); | |
| 132 return null; | |
| 133 } | |
| 134 } | |
| 135 | |
| 136 abstract class Dart2JsElementMirror extends Dart2JsDeclarationMirror { | |
| 137 final Dart2JsMirrorSystem mirrorSystem; | |
| 138 final Element _element; | |
| 139 List<InstanceMirror> _metadata; | |
| 140 | |
| 141 Dart2JsElementMirror(this.mirrorSystem, this._element) { | |
| 142 assert (mirrorSystem != null); | |
| 143 assert (_element != null); | |
| 144 } | |
| 145 | |
| 146 String get _simpleNameString => _element.name; | |
| 147 | |
| 148 /** | |
| 149 * Computes the first token for this declaration using the begin token of the | |
| 150 * element node or element position as indicator. | |
| 151 */ | |
| 152 Token getBeginToken() { | |
| 153 Element element = _element; | |
| 154 if (element is AstElement) { | |
| 155 Node node = element.node; | |
| 156 if (node != null) { | |
| 157 return node.getBeginToken(); | |
| 158 } | |
| 159 } | |
| 160 return element.position; | |
| 161 } | |
| 162 | |
| 163 /** | |
| 164 * Computes the last token for this declaration using the end token of the | |
| 165 * element node or element position as indicator. | |
| 166 */ | |
| 167 Token getEndToken() { | |
| 168 Element element = _element; | |
| 169 if (element is AstElement) { | |
| 170 Node node = element.node; | |
| 171 if (node != null) { | |
| 172 return node.getEndToken(); | |
| 173 } | |
| 174 } | |
| 175 return element.position; | |
| 176 } | |
| 177 | |
| 178 /** | |
| 179 * Returns the first token for the source of this declaration, including | |
| 180 * metadata annotations. | |
| 181 */ | |
| 182 Token getFirstToken() { | |
| 183 if (!_element.metadata.isEmpty) { | |
| 184 for (MetadataAnnotation metadata in _element.metadata) { | |
| 185 if (metadata.beginToken != null) { | |
| 186 return metadata.beginToken; | |
| 187 } | |
| 188 } | |
| 189 } | |
| 190 return getBeginToken(); | |
| 191 } | |
| 192 | |
| 193 Script getScript() => _element.compilationUnit.script; | |
| 194 | |
| 195 SourceLocation get location { | |
| 196 Token beginToken = getFirstToken(); | |
| 197 Script script = getScript(); | |
| 198 SourceSpan span; | |
| 199 if (beginToken == null) { | |
| 200 span = new SourceSpan(script.readableUri, 0, 0); | |
| 201 } else { | |
| 202 Token endToken = getEndToken(); | |
| 203 span = mirrorSystem.compiler.spanFromTokens( | |
| 204 beginToken, endToken, script.readableUri); | |
| 205 } | |
| 206 return new Dart2JsSourceLocation(script, span); | |
| 207 } | |
| 208 | |
| 209 String toString() => _element.toString(); | |
| 210 | |
| 211 void _appendCommentTokens(Token commentToken) { | |
| 212 while (commentToken != null && commentToken.kind == COMMENT_TOKEN) { | |
| 213 _metadata.add(new Dart2JsCommentInstanceMirror( | |
| 214 mirrorSystem, commentToken.value)); | |
| 215 commentToken = commentToken.next; | |
| 216 } | |
| 217 } | |
| 218 | |
| 219 List<InstanceMirror> get metadata { | |
| 220 if (_metadata == null) { | |
| 221 _metadata = <InstanceMirror>[]; | |
| 222 for (MetadataAnnotation metadata in _element.metadata) { | |
| 223 _appendCommentTokens( | |
| 224 mirrorSystem.compiler.commentMap[metadata.beginToken]); | |
| 225 metadata.ensureResolved(mirrorSystem.compiler); | |
| 226 _metadata.add(_convertConstantToInstanceMirror( | |
| 227 mirrorSystem, metadata.constant, metadata.constant.value)); | |
| 228 } | |
| 229 _appendCommentTokens(mirrorSystem.compiler.commentMap[getBeginToken()]); | |
| 230 } | |
| 231 // TODO(johnniwinther): Return an unmodifiable list instead. | |
| 232 return new List<InstanceMirror>.from(_metadata); | |
| 233 } | |
| 234 | |
| 235 DeclarationMirror lookupInScope(String name) { | |
| 236 // TODO(11653): Support lookup of constructors. | |
| 237 Scope scope = _element.buildScope(); | |
| 238 Element result; | |
| 239 int index = name.indexOf('.'); | |
| 240 if (index != -1) { | |
| 241 // Lookup [: prefix.id :]. | |
| 242 String prefix = name.substring(0, index); | |
| 243 String id = name.substring(index+1); | |
| 244 result = scope.lookup(prefix); | |
| 245 if (result != null && result.isPrefix) { | |
| 246 PrefixElement prefix = result; | |
| 247 result = prefix.lookupLocalMember(id); | |
| 248 } else { | |
| 249 result = null; | |
| 250 } | |
| 251 } else { | |
| 252 // Lookup [: id :]. | |
| 253 result = scope.lookup(name); | |
| 254 } | |
| 255 if (result == null || result.isPrefix) return null; | |
| 256 return _convertElementToDeclarationMirror(mirrorSystem, result); | |
| 257 } | |
| 258 | |
| 259 bool operator ==(var other) { | |
| 260 if (identical(this, other)) return true; | |
| 261 if (other == null) return false; | |
| 262 if (other is! Dart2JsElementMirror) return false; | |
| 263 return _element == other._element && | |
| 264 owner == other.owner; | |
| 265 } | |
| 266 | |
| 267 int get hashCode { | |
| 268 return 13 * _element.hashCode + 17 * owner.hashCode; | |
| 269 } | |
| 270 } | |
| 271 | |
| 272 //------------------------------------------------------------------------------ | |
| 273 // Mirror system implementation. | |
| 274 //------------------------------------------------------------------------------ | |
| 275 | |
| 276 class Dart2JsMirrorSystem extends MirrorSystem { | |
| 277 final Compiler compiler; | |
| 278 Map<LibraryElement, Dart2JsLibraryMirror> _libraryMap; | |
| 279 UnmodifiableMapView<Uri, LibraryMirror> _filteredLibraries; | |
| 280 | |
| 281 Dart2JsMirrorSystem(this.compiler); | |
| 282 | |
| 283 IsolateMirror get isolate => null; | |
| 284 | |
| 285 void _ensureLibraries() { | |
| 286 if (_filteredLibraries == null) { | |
| 287 var filteredLibs = new Map<Uri, LibraryMirror>(); | |
| 288 _libraryMap = new Map<LibraryElement, Dart2JsLibraryMirror>(); | |
| 289 compiler.libraryLoader.libraries.forEach((LibraryElement v) { | |
| 290 var mirror = new Dart2JsLibraryMirror(mirrorSystem, v); | |
| 291 if (_includeLibrary(mirror)) { | |
| 292 filteredLibs[mirror.uri] = mirror; | |
| 293 } | |
| 294 _libraryMap[v] = mirror; | |
| 295 }); | |
| 296 | |
| 297 _filteredLibraries = | |
| 298 new UnmodifiableMapView<Uri, LibraryMirror>(filteredLibs); | |
| 299 } | |
| 300 } | |
| 301 | |
| 302 Map<Uri, LibraryMirror> get libraries { | |
| 303 _ensureLibraries(); | |
| 304 return _filteredLibraries; | |
| 305 } | |
| 306 | |
| 307 Dart2JsLibraryMirror _getLibrary(LibraryElement element) => | |
| 308 _libraryMap[element]; | |
| 309 | |
| 310 Dart2JsMirrorSystem get mirrorSystem => this; | |
| 311 | |
| 312 TypeMirror get dynamicType => | |
| 313 _convertTypeToTypeMirror(const DynamicType()); | |
| 314 | |
| 315 TypeMirror get voidType => | |
| 316 _convertTypeToTypeMirror(const VoidType()); | |
| 317 | |
| 318 TypeMirror _convertTypeToTypeMirror(DartType type) { | |
| 319 assert(type != null); | |
| 320 if (type.treatAsDynamic) { | |
| 321 return new Dart2JsDynamicMirror(this, type); | |
| 322 } else if (type is InterfaceType) { | |
| 323 if (type.typeArguments.isEmpty) { | |
| 324 return _getTypeDeclarationMirror(type.element); | |
| 325 } else { | |
| 326 return new Dart2JsInterfaceTypeMirror(this, type); | |
| 327 } | |
| 328 } else if (type is TypeVariableType) { | |
| 329 return new Dart2JsTypeVariableMirror(this, type); | |
| 330 } else if (type is FunctionType) { | |
| 331 return new Dart2JsFunctionTypeMirror(this, type); | |
| 332 } else if (type is VoidType) { | |
| 333 return new Dart2JsVoidMirror(this, type); | |
| 334 } else if (type is TypedefType) { | |
| 335 if (type.typeArguments.isEmpty) { | |
| 336 return _getTypeDeclarationMirror(type.element); | |
| 337 } else { | |
| 338 return new Dart2JsTypedefMirror(this, type); | |
| 339 } | |
| 340 } | |
| 341 compiler.internalError(type.element, | |
| 342 "Unexpected type $type of kind ${type.kind}."); | |
| 343 return null; | |
| 344 } | |
| 345 | |
| 346 DeclarationMirror _getTypeDeclarationMirror(TypeDeclarationElement element) { | |
| 347 if (element.isClass) { | |
| 348 return new Dart2JsClassDeclarationMirror(this, element.thisType); | |
| 349 } else if (element.isTypedef) { | |
| 350 return new Dart2JsTypedefDeclarationMirror(this, element.thisType); | |
| 351 } | |
| 352 compiler.internalError(element, "Unexpected element $element."); | |
| 353 return null; | |
| 354 } | |
| 355 } | |
| 356 | |
| 357 abstract class ContainerMixin { | |
| 358 UnmodifiableMapView<Symbol, DeclarationMirror> _declarations; | |
| 359 | |
| 360 void _ensureDeclarations() { | |
| 361 if (_declarations == null) { | |
| 362 var declarations = <Symbol, DeclarationMirror>{}; | |
| 363 _forEachElement((Element element) { | |
| 364 for (DeclarationMirror mirror in _getDeclarationMirrors(element)) { | |
| 365 assert(invariant(_element, | |
| 366 !declarations.containsKey(mirror.simpleName), | |
| 367 message: "Declaration name '${nameOf(mirror)}' " | |
| 368 "is not unique in $_element.")); | |
| 369 declarations[mirror.simpleName] = mirror; | |
| 370 } | |
| 371 }); | |
| 372 _declarations = | |
| 373 new UnmodifiableMapView<Symbol, DeclarationMirror>(declarations); | |
| 374 } | |
| 375 } | |
| 376 | |
| 377 Element get _element; | |
| 378 | |
| 379 void _forEachElement(f(Element element)); | |
| 380 | |
| 381 Iterable<Dart2JsMemberMirror> _getDeclarationMirrors(Element element); | |
| 382 | |
| 383 Map<Symbol, DeclarationMirror> get declarations { | |
| 384 _ensureDeclarations(); | |
| 385 return _declarations; | |
| 386 } | |
| 387 } | |
| 388 | |
| 389 /** | |
| 390 * Converts [element] into its corresponding [DeclarationMirror], if any. | |
| 391 * | |
| 392 * If [element] is an [AbstractFieldElement] the mirror for its getter is | |
| 393 * returned or, if not present, the mirror for its setter. | |
| 394 */ | |
| 395 DeclarationMirror _convertElementToDeclarationMirror(Dart2JsMirrorSystem system, | |
| 396 Element element) { | |
| 397 if (element.isTypeVariable) { | |
| 398 TypeVariableElement typeVariable = element; | |
| 399 return new Dart2JsTypeVariableMirror(system, typeVariable.type); | |
| 400 } | |
| 401 | |
| 402 Dart2JsLibraryMirror library = system._libraryMap[element.library]; | |
| 403 if (element.isLibrary) return library; | |
| 404 if (element.isTypedef) { | |
| 405 TypedefElement typedefElement = element; | |
| 406 return new Dart2JsTypedefMirror.fromLibrary( | |
| 407 library, typedefElement.thisType); | |
| 408 } | |
| 409 | |
| 410 Dart2JsDeclarationMirror container = library; | |
| 411 if (element.enclosingClass != null) { | |
| 412 container = system._getTypeDeclarationMirror(element.enclosingClass); | |
| 413 } | |
| 414 if (element.isClass) return container; | |
| 415 if (element.isParameter) { | |
| 416 Dart2JsMethodMirror method = _convertElementMethodToMethodMirror( | |
| 417 container, element.outermostEnclosingMemberOrTopLevel); | |
| 418 // TODO(johnniwinther): Find the right info for [isOptional] and [isNamed]. | |
| 419 return new Dart2JsParameterMirror( | |
| 420 method, element, isOptional: false, isNamed: false); | |
| 421 } | |
| 422 Iterable<DeclarationMirror> members = | |
| 423 container._getDeclarationMirrors(element); | |
| 424 if (members.isEmpty) return null; | |
| 425 return members.first; | |
| 426 } | |
| 427 | |
| 428 /** | |
| 429 * Experimental API for accessing compilation units defined in a | |
| 430 * library. | |
| 431 */ | |
| 432 // TODO(ahe): Superclasses? Is this really a mirror? | |
| 433 class Dart2JsCompilationUnitMirror extends Dart2JsMirror with ContainerMixin { | |
| 434 final Dart2JsLibraryMirror _library; | |
| 435 final CompilationUnitElement _element; | |
| 436 | |
| 437 Dart2JsCompilationUnitMirror(this._element, this._library); | |
| 438 | |
| 439 Dart2JsMirrorSystem get mirrorSystem => _library.mirrorSystem; | |
| 440 | |
| 441 // TODO(johnniwinther): make sure that these are returned in declaration | |
| 442 // order. | |
| 443 void _forEachElement(f(Element element)) => _element.forEachLocalMember(f); | |
| 444 | |
| 445 Iterable<DeclarationMirror> _getDeclarationMirrors(Element element) => | |
| 446 _library._getDeclarationMirrors(element); | |
| 447 | |
| 448 Uri get uri => _element.script.resourceUri; | |
| 449 } | |
| 450 | |
| 451 class ResolvedNode { | |
| 452 final node; | |
| 453 final _elements; | |
| 454 final _mirrorSystem; | |
| 455 ResolvedNode(this.node, this._elements, this._mirrorSystem); | |
| 456 | |
| 457 Mirror resolvedMirror(node) { | |
| 458 var element = _elements[node]; | |
| 459 if (element == null) return null; | |
| 460 return _convertElementToDeclarationMirror(_mirrorSystem, element); | |
| 461 } | |
| 462 } | |
| 463 | |
| 464 /** | |
| 465 * Transitional class that allows access to features that have not yet | |
| 466 * made it to the mirror API. | |
| 467 * | |
| 468 * All API in this class is experimental. | |
| 469 */ | |
| 470 class BackDoor { | |
| 471 /// Return the compilation units comprising [library]. | |
| 472 static List<Mirror> compilationUnitsOf(Dart2JsLibraryMirror library) { | |
| 473 return library._element.compilationUnits.mapToList( | |
| 474 (cu) => new Dart2JsCompilationUnitMirror(cu, library)); | |
| 475 } | |
| 476 | |
| 477 static Iterable metadataSyntaxOf(Dart2JsElementMirror declaration) { | |
| 478 Compiler compiler = declaration.mirrorSystem.compiler; | |
| 479 return declaration._element.metadata.map((metadata) { | |
| 480 var node = metadata.parseNode(compiler); | |
| 481 var treeElements = metadata.annotatedElement.treeElements; | |
| 482 return new ResolvedNode( | |
| 483 node, treeElements, declaration.mirrorSystem); | |
| 484 }); | |
| 485 } | |
| 486 | |
| 487 static ResolvedNode initializerSyntaxOf(Dart2JsFieldMirror variable) { | |
| 488 var node = variable._variable.initializer; | |
| 489 if (node == null) return null; | |
| 490 return new ResolvedNode( | |
| 491 node, variable._variable.treeElements, variable.mirrorSystem); | |
| 492 } | |
| 493 | |
| 494 static ResolvedNode defaultValueSyntaxOf(Dart2JsParameterMirror parameter) { | |
| 495 if (!parameter.hasDefaultValue) return null; | |
| 496 ParameterElement parameterElement = parameter._element; | |
| 497 var node = parameterElement.initializer; | |
| 498 var treeElements = parameterElement.treeElements; | |
| 499 return new ResolvedNode(node, treeElements, parameter.mirrorSystem); | |
| 500 } | |
| 501 } | |
| OLD | NEW |
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Chromium Code Reviews
Issue 693183006:
Revert "Move dart2js from sdk/lib/_internal/compiler to pkg/compiler" (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart