1 /* 2 * Copyright (C) 2009 Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "bindings/v8/V8DOMWrapper.h" 33 34 #include "bindings/core/v8/V8HTMLCollection.h" 35 #include "bindings/core/v8/V8HTMLDocument.h" 36 #include "bindings/core/v8/V8Window.h" 37 #include "bindings/v8/V8Binding.h" 38 #include "bindings/v8/V8ObjectConstructor.h" 39 #include "bindings/v8/V8PerContextData.h" 40 #include "bindings/v8/V8ScriptRunner.h" 41 42 namespace WebCore { 43 44 static v8::Local<v8::Object> wrapInShadowTemplate(v8::Local<v8::Object> wrapper, Node* impl, v8::Isolate* isolate) 45 { 46 static int shadowTemplateKey; // This address is used for a key to look up the dom template. 47 V8PerIsolateData* data = V8PerIsolateData::from(isolate); 48 v8::Handle<v8::FunctionTemplate> shadowTemplate = data->existingDOMTemplate(&shadowTemplateKey); 49 if (shadowTemplate.IsEmpty()) { 50 shadowTemplate = v8::FunctionTemplate::New(isolate); 51 if (shadowTemplate.IsEmpty()) 52 return v8::Local<v8::Object>(); 53 shadowTemplate->SetClassName(v8AtomicString(isolate, "HTMLDocument")); 54 shadowTemplate->Inherit(V8HTMLDocument::domTemplate(isolate)); 55 shadowTemplate->InstanceTemplate()->SetInternalFieldCount(V8HTMLDocument::internalFieldCount); 56 data->setDOMTemplate(&shadowTemplateKey, shadowTemplate); 57 } 58 59 v8::Local<v8::Function> shadowConstructor = shadowTemplate->GetFunction(); 60 if (shadowConstructor.IsEmpty()) 61 return v8::Local<v8::Object>(); 62 63 v8::Local<v8::Object> shadow = V8ScriptRunner::instantiateObject(isolate, shadowConstructor); 64 if (shadow.IsEmpty()) 65 return v8::Local<v8::Object>(); 66 shadow->SetPrototype(wrapper); 67 V8DOMWrapper::setNativeInfoForHiddenWrapper(wrapper, &V8HTMLDocument::wrapperTypeInfo, impl); 68 return shadow; 69 } 70 71 v8::Local<v8::Object> V8DOMWrapper::createWrapper(v8::Handle<v8::Object> creationContext, const WrapperTypeInfo* type, void* impl, v8::Isolate* isolate) 72 { 73 V8WrapperInstantiationScope scope(creationContext, isolate); 74 75 V8PerContextData* perContextData = V8PerContextData::from(scope.context()); 76 v8::Local<v8::Object> wrapper = perContextData ? perContextData->createWrapperFromCache(type) : V8ObjectConstructor::newInstance(isolate, type->domTemplate(isolate)->GetFunction()); 77 78 if (type == &V8HTMLDocument::wrapperTypeInfo && !wrapper.IsEmpty()) 79 wrapper = wrapInShadowTemplate(wrapper, static_cast<Node*>(impl), isolate); 80 81 return wrapper; 82 } 83 84 bool V8DOMWrapper::isDOMWrapper(v8::Handle<v8::Value> value) 85 { 86 if (value.IsEmpty() || !value->IsObject()) 87 return false; 88 89 if (v8::Handle<v8::Object>::Cast(value)->InternalFieldCount() < v8DefaultWrapperInternalFieldCount) 90 return false; 91 92 v8::Handle<v8::Object> wrapper = v8::Handle<v8::Object>::Cast(value); 93 ASSERT(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex)); 94 ASSERT(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperTypeIndex)); 95 96 const WrapperTypeInfo* typeInfo = static_cast<const WrapperTypeInfo*>(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperTypeIndex)); 97 // FIXME: We should add a more strict way to check if the typeInfo is a typeInfo of some DOM wrapper. 98 // Even if it's a typeInfo of Blink, it's not guaranteed that it's a typeInfo of a DOM wrapper. 99 return typeInfo->ginEmbedder == gin::kEmbedderBlink; 100 } 101 102 } // namespace WebCore 103