src/third_party/WebKit/Source/bindings/core/v8/custom/V8ArrayBufferCustom.cpp

   1 /*
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   3  *
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   6  * met:
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   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
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  16  * this software without specific prior written permission.
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  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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  29  */
  30
  31 #include "config.h"
  32 #include "bindings/core/v8/custom/V8ArrayBufferCustom.h"
  33
  34 #include "bindings/core/v8/V8Binding.h"
  35 #include "wtf/ArrayBuffer.h"
  36 #include "wtf/StdLibExtras.h"
  37
  38 namespace blink {
  39
  40 using namespace WTF;
  41
  42 V8ArrayBufferDeallocationObserver* V8ArrayBufferDeallocationObserver::instanceTemplate()
  43 {
  44     DEFINE_STATIC_LOCAL(V8ArrayBufferDeallocationObserver, deallocationObserver, ());
  45     return &deallocationObserver;
  46 }
  47
  48 const WrapperTypeInfo V8ArrayBuffer::wrapperTypeInfo = {
  49     gin::kEmbedderBlink,
  50     0,
  51     V8ArrayBuffer::refObject,
  52     V8ArrayBuffer::derefObject,
  53     V8ArrayBuffer::createPersistentHandle,
  54     0, 0, 0, 0, 0, 0,
  55     WrapperTypeInfo::WrapperTypeObjectPrototype,
  56     WrapperTypeInfo::ObjectClassId,
  57     WrapperTypeInfo::Independent,
  58     WrapperTypeInfo::RefCountedObject
  59 };
  60
  61 bool V8ArrayBuffer::hasInstance(v8::Handle<v8::Value> value, v8::Isolate*)
  62 {
  63     return value->IsArrayBuffer();
  64 }
  65
  66 void V8ArrayBuffer::refObject(ScriptWrappableBase* internalPointer)
  67 {
  68     toImpl(internalPointer)->ref();
  69 }
  70
  71 void V8ArrayBuffer::derefObject(ScriptWrappableBase* internalPointer)
  72 {
  73     toImpl(internalPointer)->deref();
  74 }
  75
  76 WrapperPersistentNode* V8ArrayBuffer::createPersistentHandle(ScriptWrappableBase* internalPointer)
  77 {
  78     ASSERT_NOT_REACHED();
  79     return 0;
  80 }
  81
  82 v8::Handle<v8::Object> V8ArrayBuffer::createWrapper(PassRefPtr<ArrayBuffer> impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
  83 {
  84     ASSERT(impl.get());
  85     ASSERT(!DOMDataStore::containsWrapper<V8ArrayBuffer>(impl.get(), isolate));
  86
  87     v8::Handle<v8::Object> wrapper = v8::ArrayBuffer::New(isolate, impl->data(), impl->byteLength());
  88     impl->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instanceTemplate());
  89
  90     V8DOMWrapper::associateObjectWithWrapper<V8ArrayBuffer>(impl, &wrapperTypeInfo, wrapper, isolate);
  91     return wrapper;
  92 }
  93
  94 ArrayBuffer* V8ArrayBuffer::toImpl(v8::Handle<v8::Object> object)
  95 {
  96     ASSERT(object->IsArrayBuffer());
  97     v8::Local<v8::ArrayBuffer> v8buffer = object.As<v8::ArrayBuffer>();
  98     if (v8buffer->IsExternal()) {
  99         RELEASE_ASSERT(toWrapperTypeInfo(object)->ginEmbedder == gin::kEmbedderBlink);
 100         return reinterpret_cast<ArrayBuffer*>(blink::toScriptWrappableBase(object));
 101     }
 102
 103     v8::ArrayBuffer::Contents v8Contents = v8buffer->Externalize();
 104     ArrayBufferContents contents(v8Contents.Data(), v8Contents.ByteLength(),
 105         V8ArrayBufferDeallocationObserver::instanceTemplate());
 106     RefPtr<ArrayBuffer> buffer = ArrayBuffer::create(contents);
 107     V8DOMWrapper::associateObjectWithWrapper<V8ArrayBuffer>(buffer.release(), &wrapperTypeInfo, object, v8::Isolate::GetCurrent());
 108
 109     return reinterpret_cast<ArrayBuffer*>(blink::toScriptWrappableBase(object));
 110 }
 111
 112 ArrayBuffer* V8ArrayBuffer::toImplWithTypeCheck(v8::Isolate* isolate, v8::Handle<v8::Value> value)
 113 {
 114     return V8ArrayBuffer::hasInstance(value, isolate) ? V8ArrayBuffer::toImpl(v8::Handle<v8::Object>::Cast(value)) : 0;
 115 }
 116
 117 template<>
 118 v8::Handle<v8::Value> toV8NoInline(ArrayBuffer* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 119 {
 120     return toV8(impl, creationContext, isolate);
 121 }
 122
 123 } // namespace blink