src/third_party/WebKit/Source/core/dom/DOMDataView.cpp

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "config.h"
   6 #include "core/dom/DOMDataView.h"
   7
   8 #include "bindings/core/v8/DOMDataStore.h"
   9 #include "bindings/core/v8/V8ArrayBuffer.h"
  10 #include "bindings/core/v8/V8DOMWrapper.h"
  11
  12 namespace blink {
  13
  14 PassRefPtr<DOMDataView> DOMDataView::create(PassRefPtr<DOMArrayBuffer> prpBuffer, unsigned byteOffset, unsigned byteLength)
  15 {
  16     RefPtr<DOMArrayBuffer> buffer = prpBuffer;
  17     return adoptRef(new DOMDataView(DataView::create(buffer->buffer(), byteOffset, byteLength), buffer));
  18 }
  19
  20 v8::Handle<v8::Object> DOMDataView::wrap(v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
  21 {
  22     // It's possible that no one except for the new wrapper owns this object at
  23     // this moment, so we have to prevent GC to collect this object until the
  24     // object gets associated with the wrapper.
  25     RefPtr<DOMDataView> protect(this);
  26
  27     ASSERT(!DOMDataStore::containsWrapper(this, isolate));
  28
  29     const WrapperTypeInfo* wrapperTypeInfo = this->wrapperTypeInfo();
  30     v8::Local<v8::Value> v8Buffer = toV8(buffer(), creationContext, isolate);
  31     ASSERT(v8Buffer->IsArrayBuffer());
  32
  33     v8::Handle<v8::Object> wrapper = v8::DataView::New(v8Buffer.As<v8::ArrayBuffer>(), byteOffset(), byteLength());
  34
  35     return associateWithWrapper(wrapperTypeInfo, wrapper, isolate);
  36 }
  37
  38 v8::Handle<v8::Object> DOMDataView::associateWithWrapper(const WrapperTypeInfo* wrapperTypeInfo, v8::Handle<v8::Object> wrapper, v8::Isolate* isolate)
  39 {
  40     return V8DOMWrapper::associateObjectWithWrapper(isolate, this, wrapperTypeInfo, wrapper);
  41 }
  42
  43 } // namespace blink