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
wrapInShadowTemplate(v8::Local<v8::Object> wrapper,Node * impl,v8::Isolate * isolate)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
createWrapper(v8::Handle<v8::Object> creationContext,const WrapperTypeInfo * type,void * impl,v8::Isolate * isolate)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
isDOMWrapper(v8::Handle<v8::Value> value)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