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 "V8HTMLCollection.h"
35 #include "V8HTMLDocument.h"
36 #include "V8Window.h"
37 #include "bindings/v8/V8Binding.h"
38 #include "bindings/v8/V8HiddenPropertyName.h"
39 #include "bindings/v8/V8ObjectConstructor.h"
40 #include "bindings/v8/V8PerContextData.h"
41 #include "bindings/v8/V8ScriptRunner.h"
42
43 namespace WebCore {
44
wrapInShadowTemplate(v8::Local<v8::Object> wrapper,Node * impl,v8::Isolate * isolate)45 static v8::Local<v8::Object> wrapInShadowTemplate(v8::Local<v8::Object> wrapper, Node* impl, v8::Isolate* isolate)
46 {
47 // This is only for getting a unique pointer which we can pass to privateTemplate.
48 static int shadowTemplateUniqueKey;
49 WrapperWorldType currentWorldType = worldType(isolate);
50 V8PerIsolateData* data = V8PerIsolateData::from(isolate);
51 v8::Handle<v8::FunctionTemplate> shadowTemplate = data->privateTemplateIfExists(currentWorldType, &shadowTemplateUniqueKey);
52 if (shadowTemplate.IsEmpty()) {
53 shadowTemplate = v8::FunctionTemplate::New(isolate);
54 if (shadowTemplate.IsEmpty())
55 return v8::Local<v8::Object>();
56 shadowTemplate->SetClassName(v8AtomicString(isolate, "HTMLDocument"));
57 shadowTemplate->Inherit(V8HTMLDocument::domTemplate(isolate, currentWorldType));
58 shadowTemplate->InstanceTemplate()->SetInternalFieldCount(V8HTMLDocument::internalFieldCount);
59 data->setPrivateTemplate(currentWorldType, &shadowTemplateUniqueKey, shadowTemplate);
60 }
61
62 v8::Local<v8::Function> shadowConstructor = shadowTemplate->GetFunction();
63 if (shadowConstructor.IsEmpty())
64 return v8::Local<v8::Object>();
65
66 v8::Local<v8::Object> shadow = V8ScriptRunner::instantiateObject(shadowConstructor);
67 if (shadow.IsEmpty())
68 return v8::Local<v8::Object>();
69 shadow->SetPrototype(wrapper);
70 V8DOMWrapper::setNativeInfo(wrapper, &V8HTMLDocument::wrapperTypeInfo, impl);
71 return shadow;
72 }
73
createWrapper(v8::Handle<v8::Object> creationContext,const WrapperTypeInfo * type,void * impl,v8::Isolate * isolate)74 v8::Local<v8::Object> V8DOMWrapper::createWrapper(v8::Handle<v8::Object> creationContext, const WrapperTypeInfo* type, void* impl, v8::Isolate* isolate)
75 {
76 V8WrapperInstantiationScope scope(creationContext, isolate);
77
78 V8PerContextData* perContextData = V8PerContextData::from(scope.context());
79 v8::Local<v8::Object> wrapper = perContextData ? perContextData->createWrapperFromCache(type) : V8ObjectConstructor::newInstance(type->domTemplate(isolate, worldTypeInMainThread(isolate))->GetFunction());
80
81 if (type == &V8HTMLDocument::wrapperTypeInfo && !wrapper.IsEmpty())
82 wrapper = wrapInShadowTemplate(wrapper, static_cast<Node*>(impl), isolate);
83
84 return wrapper;
85 }
86
hasInternalField(v8::Handle<v8::Value> value)87 static bool hasInternalField(v8::Handle<v8::Value> value)
88 {
89 if (value.IsEmpty() || !value->IsObject())
90 return false;
91 return v8::Handle<v8::Object>::Cast(value)->InternalFieldCount();
92 }
93
94 #ifndef NDEBUG
maybeDOMWrapper(v8::Handle<v8::Value> value)95 bool V8DOMWrapper::maybeDOMWrapper(v8::Handle<v8::Value> value)
96 {
97 if (!hasInternalField(value))
98 return false;
99
100 v8::Handle<v8::Object> object = v8::Handle<v8::Object>::Cast(value);
101 ASSERT(object->InternalFieldCount() >= v8DefaultWrapperInternalFieldCount);
102
103 v8::HandleScope scope(v8::Isolate::GetCurrent());
104 ASSERT(object->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex));
105
106 const WrapperTypeInfo* typeInfo = static_cast<const WrapperTypeInfo*>(object->GetAlignedPointerFromInternalField(v8DOMWrapperTypeIndex));
107
108 return typeInfo->ginEmbedder == gin::kEmbedderBlink;
109 }
110 #endif
111
isDOMWrapper(v8::Handle<v8::Value> value)112 bool V8DOMWrapper::isDOMWrapper(v8::Handle<v8::Value> value)
113 {
114 if (value.IsEmpty() || !value->IsObject())
115 return false;
116
117 v8::Handle<v8::Object> wrapper = v8::Handle<v8::Object>::Cast(value);
118 if (wrapper->InternalFieldCount() < v8DefaultWrapperInternalFieldCount)
119 return false;
120 ASSERT(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex));
121 ASSERT(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperTypeIndex));
122
123 const WrapperTypeInfo* typeInfo = static_cast<const WrapperTypeInfo*>(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperTypeIndex));
124
125 // FIXME: Add class id checks.
126 return typeInfo->ginEmbedder == gin::kEmbedderBlink;
127 }
128
isWrapperOfType(v8::Handle<v8::Value> value,const WrapperTypeInfo * type)129 bool V8DOMWrapper::isWrapperOfType(v8::Handle<v8::Value> value, const WrapperTypeInfo* type)
130 {
131 if (!hasInternalField(value))
132 return false;
133
134 v8::Handle<v8::Object> wrapper = v8::Handle<v8::Object>::Cast(value);
135 ASSERT(wrapper->InternalFieldCount() >= v8DefaultWrapperInternalFieldCount);
136 ASSERT(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperObjectIndex));
137
138 const WrapperTypeInfo* typeInfo = static_cast<const WrapperTypeInfo*>(wrapper->GetAlignedPointerFromInternalField(v8DOMWrapperTypeIndex));
139 return typeInfo->ginEmbedder == gin::kEmbedderBlink && typeInfo == type;
140 }
141
142 } // namespace WebCore
143