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

   1 /*
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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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  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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  29  */
  30
  31 #include "config.h"
  32 #include "bindings/v8/custom/V8ArrayBufferCustom.h"
  33
  34 #include "bindings/v8/V8Binding.h"
  35 #include "wtf/ArrayBuffer.h"
  36 #include "wtf/StdLibExtras.h"
  37
  38 namespace WebCore {
  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, V8ArrayBuffer::derefObject,
  51     0, 0, 0, 0, 0, WrapperTypeObjectPrototype, RefCountedObject
  52 };
  53
  54 bool V8ArrayBuffer::hasInstance(v8::Handle<v8::Value> value, v8::Isolate*)
  55 {
  56     return value->IsArrayBuffer();
  57 }
  58
  59 void V8ArrayBuffer::derefObject(void* object)
  60 {
  61     static_cast<ArrayBuffer*>(object)->deref();
  62 }
  63
  64 v8::Handle<v8::Object> V8ArrayBuffer::createWrapper(PassRefPtr<ArrayBuffer> impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
  65 {
  66     ASSERT(impl.get());
  67     ASSERT(!DOMDataStore::containsWrapper<V8ArrayBuffer>(impl.get(), isolate));
  68
  69     v8::Handle<v8::Object> wrapper = v8::ArrayBuffer::New(isolate, impl->data(), impl->byteLength());
  70     impl->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instanceTemplate());
  71
  72     V8DOMWrapper::associateObjectWithWrapper<V8ArrayBuffer>(impl, &wrapperTypeInfo, wrapper, isolate, WrapperConfiguration::Independent);
  73     return wrapper;
  74 }
  75
  76 ArrayBuffer* V8ArrayBuffer::toNative(v8::Handle<v8::Object> object)
  77 {
  78     ASSERT(object->IsArrayBuffer());
  79     v8::Local<v8::ArrayBuffer> v8buffer = object.As<v8::ArrayBuffer>();
  80     if (v8buffer->IsExternal()) {
  81         RELEASE_ASSERT(toWrapperTypeInfo(object)->ginEmbedder == gin::kEmbedderBlink);
  82         return reinterpret_cast<ArrayBuffer*>(WebCore::toNative(object));
  83     }
  84
  85     v8::ArrayBuffer::Contents v8Contents = v8buffer->Externalize();
  86     ArrayBufferContents contents(v8Contents.Data(), v8Contents.ByteLength(),
  87         V8ArrayBufferDeallocationObserver::instanceTemplate());
  88     RefPtr<ArrayBuffer> buffer = ArrayBuffer::create(contents);
  89     V8DOMWrapper::associateObjectWithWrapper<V8ArrayBuffer>(buffer.release(), &wrapperTypeInfo, object, v8::Isolate::GetCurrent(), WrapperConfiguration::Dependent);
  90
  91     return reinterpret_cast<ArrayBuffer*>(WebCore::toNative(object));
  92 }
  93
  94 ArrayBuffer* V8ArrayBuffer::toNativeWithTypeCheck(v8::Isolate* isolate, v8::Handle<v8::Value> value)
  95 {
  96     return V8ArrayBuffer::hasInstance(value, isolate) ? V8ArrayBuffer::toNative(v8::Handle<v8::Object>::Cast(value)) : 0;
  97 }
  98
  99 template<>
 100 v8::Handle<v8::Value> toV8NoInline(ArrayBuffer* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 101 {
 102     return toV8(impl, creationContext, isolate);
 103 }
 104
 105 } // namespace WebCore