bindings: Adds DOMArrayBuffer, etc. as thin wrappers for ArrayBuffer, etc.

Source/core/dom/DOMTypedArray.h

Index: Source/core/dom/DOMTypedArray.h
diff --git a/Source/core/dom/DOMTypedArray.h b/Source/core/dom/DOMTypedArray.h
new file mode 100644
index 0000000000000000000000000000000000000000..8ab3ef1260c7cb2eedeedd03c3cc4053560568a8
--- /dev/null
+++ b/Source/core/dom/DOMTypedArray.h
@@ -0,0 +1,82 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef DOMTypedArray_h
+#define DOMTypedArray_h
+
+#include "bindings/core/v8/ScriptWrappable.h"
+#include "core/dom/DOMArrayBufferView.h"
+#include "wtf/Float32Array.h"
+#include "wtf/Float64Array.h"
+#include "wtf/Int16Array.h"
+#include "wtf/Int32Array.h"
+#include "wtf/Int8Array.h"
+#include "wtf/Uint16Array.h"
+#include "wtf/Uint32Array.h"
+#include "wtf/Uint8Array.h"
+#include "wtf/Uint8ClampedArray.h"
+#include <v8.h>
+
+namespace blink {
+
+template<typename WTFTypedArray, typename V8TypedArray>
+class DOMTypedArray : public DOMArrayBufferView {

[haraken, 2014/10/16 05:41:42]

Add final.

[Yuki, 2014/10/16 14:21:51]

No, we cannot.  We have derived classes.

+    DEFINE_WRAPPERTYPEINFO();
+    typedef DOMTypedArray<WTFTypedArray, V8TypedArray> ThisType;
+public:
+    typedef typename WTFTypedArray::ValueType ValueType;
+
+    static PassRefPtr<ThisType> create(PassRefPtr<WTFTypedArray> bufferView)
+    {
+        if (!bufferView.get())

[haraken, 2014/10/16 05:41:42]

Can this happen? It's nasty that a create method returns nullptr. Can we add
ASSERT(bufferView) instead of the if branch?

[Yuki, 2014/10/16 14:21:51]

Ditto.

+            return nullptr;
+        return adoptRef(new ThisType(bufferView));
+    }
+    static PassRefPtr<ThisType> create(unsigned length)
+    {
+        return adoptRef(new ThisType(WTFTypedArray::create(length)));
+    }
+    static PassRefPtr<ThisType> create(const ValueType* array, unsigned length)
+    {
+        return adoptRef(new ThisType(WTFTypedArray::create(array, length)));
+    }
+    static PassRefPtr<ThisType> create(PassRefPtr<WTF::ArrayBuffer> buffer, unsigned byteOffset, unsigned length)
+    {
+        return adoptRef(new ThisType(WTFTypedArray::create(buffer, byteOffset, length)));
+    }
+    static PassRefPtr<ThisType> create(PassRefPtr<DOMArrayBuffer> prpBuffer, unsigned byteOffset, unsigned length)
+    {
+        RefPtr<DOMArrayBuffer> buffer = prpBuffer;
+        return adoptRef(new ThisType(WTFTypedArray::create(buffer->buffer(), byteOffset, length), buffer));
+    }
+
+    const WTFTypedArray* view() const { return static_cast<const WTFTypedArray*>(DOMArrayBufferView::view()); }
+    WTFTypedArray* view() { return static_cast<WTFTypedArray*>(DOMArrayBufferView::view()); }
+
+    ValueType* data() const { return view()->data(); }
+    unsigned length() const { return view()->length(); }
+
+    virtual v8::Handle<v8::Object> wrap(v8::Handle<v8::Object> creationContext, v8::Isolate*) override;
+    virtual v8::Handle<v8::Object> associateWithWrapper(const WrapperTypeInfo*, v8::Handle<v8::Object> wrapper, v8::Isolate*) override;
+
+protected:
+    explicit DOMTypedArray(PassRefPtr<WTFTypedArray> bufferView)
+        : DOMArrayBufferView(bufferView) { }
+    DOMTypedArray(PassRefPtr<WTFTypedArray> bufferView, PassRefPtr<DOMArrayBuffer> domArrayBuffer)
+        : DOMArrayBufferView(bufferView, domArrayBuffer) { }
+};
+
+typedef DOMTypedArray<WTF::Int8Array, v8::Int8Array> DOMInt8Array;
+typedef DOMTypedArray<WTF::Int16Array, v8::Int16Array> DOMInt16Array;
+typedef DOMTypedArray<WTF::Int32Array, v8::Int32Array> DOMInt32Array;
+typedef DOMTypedArray<WTF::Uint8Array, v8::Uint8Array> DOMUint8Array;
+typedef DOMTypedArray<WTF::Uint8ClampedArray, v8::Uint8ClampedArray> DOMUint8ClampedArray;
+typedef DOMTypedArray<WTF::Uint16Array, v8::Uint16Array> DOMUint16Array;
+typedef DOMTypedArray<WTF::Uint32Array, v8::Uint32Array> DOMUint32Array;
+typedef DOMTypedArray<WTF::Float32Array, v8::Float32Array> DOMFloat32Array;
+typedef DOMTypedArray<WTF::Float64Array, v8::Float64Array> DOMFloat64Array;
+
+} // namespace blink
+
+#endif // DOMTypedArray_h