Introduce FlexibleArrayBufferView and TypedFlexibleArrayBufferView

Source/bindings/core/v8/V8Binding.cpp

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 15 matching lines @@
  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "config.h"
 #include "bindings/core/v8/V8Binding.h"
 
 #include "bindings/core/v8/ScriptController.h"
 #include "bindings/core/v8/V8AbstractEventListener.h"
+#include "bindings/core/v8/V8ArrayBufferView.h"
 #include "bindings/core/v8/V8BindingMacros.h"
 #include "bindings/core/v8/V8Element.h"
 #include "bindings/core/v8/V8EventTarget.h"
 #include "bindings/core/v8/V8NodeFilter.h"
 #include "bindings/core/v8/V8NodeFilterCondition.h"
 #include "bindings/core/v8/V8ObjectConstructor.h"
 #include "bindings/core/v8/V8Window.h"
 #include "bindings/core/v8/V8WorkerGlobalScope.h"
 #include "bindings/core/v8/V8XPathNSResolver.h"
 #include "bindings/core/v8/WindowProxy.h"
 #include "bindings/core/v8/WorkerScriptController.h"
 #include "bindings/core/v8/custom/V8CustomXPathNSResolver.h"
 #include "core/dom/Document.h"
 #include "core/dom/Element.h"
+#include "core/dom/FlexibleArrayBufferView.h"
 #include "core/dom/NodeFilter.h"
 #include "core/dom/QualifiedName.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/frame/Settings.h"
 #include "core/inspector/InspectorTraceEvents.h"
 #include "core/loader/FrameLoader.h"
 #include "core/loader/FrameLoaderClient.h"
 #include "core/workers/WorkerGlobalScope.h"
 #include "core/xml/XPathNSResolver.h"
@@ skipping 689 matching lines @@
     // exists on a prototype chain of v8Value.
     if (DOMWindow* window = toDOMWindow(isolate, value))
         return static_cast<EventTarget*>(window);
     if (V8EventTarget::hasInstance(value, isolate)) {
         v8::Local<v8::Object> object = v8::Local<v8::Object>::Cast(value);
         return toWrapperTypeInfo(object)->toEventTarget(object);
     }
     return 0;
 }
 
+void toFlexibleArrayBufferView(v8::Isolate* isolate, v8::Handle<v8::Value> value, FlexibleArrayBufferView& result, void* storage)
+{
+    if (!value->IsArrayBufferView())

[haraken, 2015/07/30 20:34:43]

Is this a valid situation? If not, we can change this to
ASSERT(value->IsArrayBufferView()).

[Michael Lippautz, 2015/07/31 07:53:38]

As far as I see, it should always be an ArrayBufferView. Turned it into an
assertion. 

+        return;
+    v8::Local<v8::ArrayBufferView> buffer = value.As<v8::ArrayBufferView>();
+    if (!storage) {
+        result.setFull(V8ArrayBufferView::toImpl(buffer));
+        return;
+    }
+    size_t length = buffer->ByteLength();
+    buffer->CopyContents(storage, length);
+    result.setSmall(storage, length);
+}
+
 v8::Local<v8::Context> toV8Context(ExecutionContext* context, DOMWrapperWorld& world)
 {
     ASSERT(context);
     if (context->isDocument()) {
         if (LocalFrame* frame = toDocument(context)->frame())
             return toV8Context(frame, world);
     } else if (context->isWorkerGlobalScope()) {
         if (WorkerScriptController* script = toWorkerGlobalScope(context)->script()) {
             if (script->scriptState()->contextIsValid())
                 return script->scriptState()->context();
@@ skipping 235 matching lines @@
     v8::Local<v8::Value> data = info.Data();
     ASSERT(data->IsExternal());
     V8PerContextData* perContextData = V8PerContextData::from(info.Holder()->CreationContext());
     if (!perContextData)
         return;
     v8SetReturnValue(info, perContextData->constructorForType(WrapperTypeInfo::unwrap(data)));
     TRACE_EVENT_SET_SAMPLING_STATE("v8", "V8Execution");
 }
 
 } // namespace blink