Move lib from sdk/lib/_internal/compiler/implementation to _internal root.

sdk/lib/_internal/compiler/implementation/lib/native_helper.dart

Index: sdk/lib/_internal/compiler/implementation/lib/native_helper.dart
===================================================================
--- sdk/lib/_internal/compiler/implementation/lib/native_helper.dart	(revision 23664)
+++ sdk/lib/_internal/compiler/implementation/lib/native_helper.dart	(working copy)
@@ -1,313 +0,0 @@
-// Copyright (c) 2012, 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.
-
-part of _js_helper;
-
-String typeNameInChrome(obj) {
-  String name = JS('String', "#.constructor.name", obj);
-  return typeNameInWebKitCommon(name);
-}
-
-String typeNameInSafari(obj) {
-  String name = JS('String', '#', constructorNameFallback(obj));
-  // Safari is very similar to Chrome.
-  return typeNameInWebKitCommon(name);
-}
-
-String typeNameInWebKitCommon(tag) {
-  String name = JS('String', '#', tag);
-  if (name == 'CanvasPixelArray') return 'Uint8ClampedArray';
-  if (name == 'AudioChannelMerger') return 'ChannelMergerNode';
-  if (name == 'AudioChannelSplitter') return 'ChannelSplitterNode';
-  if (name == 'AudioGainNode') return 'GainNode';
-  if (name == 'AudioPannerNode') return 'PannerNode';
-  if (name == 'JavaScriptAudioNode') return 'ScriptProcessorNode';
-  if (name == 'Oscillator') return 'OscillatorNode';
-  if (name == 'RealtimeAnalyserNode') return 'AnalyserNode';
-  if (name == 'IDBVersionChangeRequest') return 'IDBOpenDBRequest';
-  return name;
-}
-
-String typeNameInOpera(obj) {
-  String name = JS('String', '#', constructorNameFallback(obj));
-  return name;
-}
-
-String typeNameInFirefox(obj) {
-  String name = JS('String', '#', constructorNameFallback(obj));
-  if (name == 'BeforeUnloadEvent') return 'Event';
-  if (name == 'CSS2Properties') return 'CSSStyleDeclaration';
-  if (name == 'DataTransfer') return 'Clipboard';
-  if (name == 'DragEvent') return 'MouseEvent';
-  if (name == 'GeoGeolocation') return 'Geolocation';
-  if (name == 'WorkerMessageEvent') return 'MessageEvent';
-  if (name == 'XMLDocument') return 'Document';
-  return name;
-}
-
-String typeNameInIE(obj) {
-  String name = JS('String', '#', constructorNameFallback(obj));
-  if (name == 'Document') {
-    // IE calls both HTML and XML documents 'Document', so we check for the
-    // xmlVersion property, which is the empty string on HTML documents.
-    if (JS('bool', '!!#.xmlVersion', obj)) return 'Document';
-    return 'HTMLDocument';
-  }
-  if (name == 'BeforeUnloadEvent') return 'Event';
-  if (name == 'CanvasPixelArray') return 'Uint8ClampedArray';
-  if (name == 'DataTransfer') return 'Clipboard';
-  if (name == 'DragEvent') return 'MouseEvent';
-  if (name == 'HTMLDDElement') return 'HTMLElement';
-  if (name == 'HTMLDTElement') return 'HTMLElement';
-  if (name == 'HTMLTableDataCellElement') return 'HTMLTableCellElement';
-  if (name == 'HTMLTableHeaderCellElement') return 'HTMLTableCellElement';
-  if (name == 'HTMLPhraseElement') return 'HTMLElement';
-  if (name == 'MSStyleCSSProperties') return 'CSSStyleDeclaration';
-  if (name == 'Position') return 'Geoposition';
-
-  // Patches for types which report themselves as Objects.
-  if (name == 'Object') {
-    if (JS('bool', 'window.DataView && (# instanceof window.DataView)', obj)) {
-      return 'DataView';
-    }
-  }
-  return name;
-}
-
-String constructorNameFallback(object) {
-  if (object == null) return 'Null';
-  var constructor = JS('var', "#.constructor", object);
-  if (identical(JS('String', "typeof(#)", constructor), 'function')) {
-    var name = JS('var', r'#.builtin$cls', constructor);
-    if (name != null) return name;
-    // The constructor isn't null or undefined at this point. Try
-    // to grab hold of its name.
-    name = JS('var', '#.name', constructor);
-    // If the name is a non-empty string, we use that as the type
-    // name of this object. On Firefox, we often get 'Object' as
-    // the constructor name even for more specialized objects so
-    // we have to fall through to the toString() based implementation
-    // below in that case.
-    if (name is String
-        && !identical(name, '')
-        && !identical(name, 'Object')
-        && !identical(name, 'Function.prototype')) {  // Can happen in Opera.
-      return name;
-    }
-  }
-  String string = JS('String', 'Object.prototype.toString.call(#)', object);
-  return JS('String', '#.substring(8, # - 1)', string, string.length);
-}
-
-/**
- * If a lookup on an object [object] that has [tag] fails, this function is
- * called to provide an alternate tag.  This allows us to fail gracefully if we
- * can make a good guess, for example, when browsers add novel kinds of
- * HTMLElement that we have never heard of.
- */
-String alternateTag(object, String tag) {
-  // Does it smell like some kind of HTML element?
-  if (JS('bool', r'!!/^HTML[A-Z].*Element$/.test(#)', tag)) {
-    // Check that it is not a simple JavaScript object.
-    String string = JS('String', 'Object.prototype.toString.call(#)', object);
-    if (string == '[object Object]') return null;
-    return 'HTMLElement';
-  }
-  return null;
-}
-
-// TODO(ngeoffray): stop using this method once our optimizers can
-// change str1.contains(str2) into str1.indexOf(str2) != -1.
-bool contains(String userAgent, String name) {
-  return JS('int', '#.indexOf(#)', userAgent, name) != -1;
-}
-
-int arrayLength(List array) {
-  return JS('int', '#.length', array);
-}
-
-arrayGet(List array, int index) {
-  return JS('var', '#[#]', array, index);
-}
-
-void arraySet(List array, int index, var value) {
-  JS('var', '#[#] = #', array, index, value);
-}
-
-propertyGet(var object, String property) {
-  return JS('var', '#[#]', object, property);
-}
-
-bool callHasOwnProperty(var function, var object, String property) {
-  return JS('bool', '#.call(#, #)', function, object, property);
-}
-
-void propertySet(var object, String property, var value) {
-  JS('var', '#[#] = #', object, property, value);
-}
-
-getPropertyFromPrototype(var object, String name) {
-  return JS('var', 'Object.getPrototypeOf(#)[#]', object, name);
-}
-
-newJsObject() {
-  return JS('var', '{}');
-}
-
-/**
- * Returns the function to use to get the type name of an object.
- */
-Function getFunctionForTypeNameOf() {
-  // If we're not in the browser, we're almost certainly running on v8.
-  if (!identical(JS('String', 'typeof(navigator)'), 'object')) return typeNameInChrome;
-
-  String userAgent = JS('String', "navigator.userAgent");
-  // TODO(antonm): remove a reference to DumpRenderTree.
-  if (contains(userAgent, 'Chrome') || contains(userAgent, 'DumpRenderTree')) {
-    return typeNameInChrome;
-  } else if (contains(userAgent, 'Firefox')) {
-    return typeNameInFirefox;
-  } else if (contains(userAgent, 'MSIE')) {
-    return typeNameInIE;
-  } else if (contains(userAgent, 'Opera')) {
-    return typeNameInOpera;
-  } else if (contains(userAgent, 'AppleWebKit')) {
-    // Chrome matches 'AppleWebKit' too, but we test for Chrome first, so this
-    // is not a problem.
-    // Note: Just testing for "Safari" doesn't work when the page is embedded
-    // in a UIWebView on iOS 6.
-    return typeNameInSafari;
-  } else {
-    return constructorNameFallback;
-  }
-}
-
-
-/**
- * Cached value for the function to use to get the type name of an
- * object.
- */
-Function _getTypeNameOf;
-
-/**
- * Returns the type name of [obj].
- */
-String getTypeNameOf(var obj) {
-  if (_getTypeNameOf == null) _getTypeNameOf = getFunctionForTypeNameOf();
-  return _getTypeNameOf(obj);
-}
-
-String toStringForNativeObject(var obj) {
-  String name = JS('String', '#', getTypeNameOf(obj));
-  return 'Instance of $name';
-}
-
-int hashCodeForNativeObject(object) => Primitives.objectHashCode(object);
-
-/**
- * Sets a JavaScript property on an object.
- */
-void defineProperty(var obj, String property, var value) {
-  JS('void',
-      'Object.defineProperty(#, #, '
-          '{value: #, enumerable: false, writable: true, configurable: true})',
-      obj,
-      property,
-      value);
-}
-
-
-// Is [obj] an instance of a Dart-defined class?
-bool isDartObject(obj) {
-  // Some of the extra parens here are necessary.
-  return JS('bool', '((#) instanceof (#))', obj, JS_DART_OBJECT_CONSTRUCTOR());
-}
-
-/// A JavaScript object mapping tags to interceptors.
-var interceptorsByTag;
-
-/// A JavaScript object mapping tags to `true` or `false`.
-var leafTags;
-
-/**
- * Associates tags with an interceptor.  Called from generated code.  The tags
- * are all 'leaf' tags representing classes that have no subclasses with
- * different behaviour.
- *
- * [tags] is a string of `|`-separated tags.
- */
-void defineNativeMethods(String tags, interceptorClass) {
-  defineNativeMethodsCommon(tags, interceptorClass, true);
-}
-
-/**
- * Associates tags with an interceptor.  Called from generated code.  The tags
- * are all non-'leaf' tags, representing classes that have a subclass with
- * different behaviour.
- */
-void defineNativeMethodsNonleaf(String tags, interceptorClass) {
-  defineNativeMethodsCommon(tags, interceptorClass, false);
-}
-
-void defineNativeMethodsCommon(String tags, var interceptorClass, bool isLeaf) {
-  var methods = JS('', '#.prototype', interceptorClass);
-  if (interceptorsByTag == null) interceptorsByTag = JS('=Object', '{}');
-  if (leafTags == null) leafTags = JS('=Object', '{}');
-
-  var tagsList = JS('=List', '#.split("|")', tags);
-  for (int i = 0; i < tagsList.length; i++) {
-    var tag = tagsList[i];
-    JS('void', '#[#] = #', interceptorsByTag, tag, methods);
-    JS('void', '#[#] = #', leafTags, tag, isLeaf);
-  }
-}
-
-void defineNativeMethodsFinish() {
-  // TODO(sra): Investigate placing a dispatch record on Object.prototype that
-  // returns an interceptor for JavaScript objects.  This avoids needing a test
-  // in every interceptor, and prioritizes the performance of known native
-  // classes over unknown.
-}
-
-lookupInterceptor(var hasOwnPropertyFunction, String tag) {
-  var map = interceptorsByTag;
-  if (map == null) return null;
-  return callHasOwnProperty(hasOwnPropertyFunction, map, tag)
-      ? propertyGet(map, tag)
-      : null;
-}
-
-lookupDispatchRecord(obj) {
-  var hasOwnPropertyFunction = JS('var', 'Object.prototype.hasOwnProperty');
-  var interceptor = null;
-  assert(!isDartObject(obj));
-  String tag = getTypeNameOf(obj);
-
-  interceptor = lookupInterceptor(hasOwnPropertyFunction, tag);
-  if (interceptor == null) {
-    String secondTag = alternateTag(obj, tag);
-    if (secondTag != null) {
-      interceptor = lookupInterceptor(hasOwnPropertyFunction, secondTag);
-    }
-  }
-  if (interceptor == null) {
-    // This object is not known to Dart.  There could be several
-    // reasons for that, including (but not limited to):
-    // * A bug in native code (hopefully this is caught during development).
-    // * An unknown DOM object encountered.
-    // * JavaScript code running in an unexpected context.  For
-    //   example, on node.js.
-    return null;
-  }
-  var isLeaf =
-      (leafTags != null) && JS('bool', '(#[#]) === true', leafTags, tag);
-  if (isLeaf) {
-    var fieldName = JS_IS_INDEXABLE_FIELD_NAME();
-    bool indexability = JS('bool', r'!!#[#]', interceptor, fieldName);
-    return makeDispatchRecord(interceptor, false, null, indexability);
-  } else {
-    var proto = JS('', 'Object.getPrototypeOf(#)', obj);
-    return makeDispatchRecord(interceptor, proto, null, null);
-  }
-}