third_party/WebKit/Source/bindings/core/v8/custom/V8HTMLPlugInElementCustom.cpp

/*
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* Copyright (C) 2014 Opera Software ASA. All rights reserved.
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#include "bindings/core/v8/SharedPersistent.h"
#include "bindings/core/v8/V8Binding.h"
#include "bindings/core/v8/V8HTMLEmbedElement.h"
#include "bindings/core/v8/V8HTMLObjectElement.h"
#include "core/frame/Deprecation.h"
#include "core/frame/UseCounter.h"
#include "wtf/PtrUtil.h"
#include <memory>

namespace blink {

namespace {

template <typename ElementType>
void getScriptableObjectProperty(
    const AtomicString& name,
    const v8::PropertyCallbackInfo<v8::Value>& info) {
  HTMLPlugInElement* impl = ElementType::toImpl(info.Holder());
  RefPtr<SharedPersistent<v8::Object>> wrapper = impl->pluginWrapper();
  if (!wrapper)
    return;

  v8::Local<v8::Object> instance = wrapper->newLocal(info.GetIsolate());
  if (instance.IsEmpty())
    return;

  v8::Local<v8::String> v8Name = v8String(info.GetIsolate(), name);
  if (!v8CallBoolean(instance->HasOwnProperty(
          info.GetIsolate()->GetCurrentContext(), v8Name)))
    return;

  v8::Local<v8::Value> value;
  if (!instance->Get(info.GetIsolate()->GetCurrentContext(), v8Name)
           .ToLocal(&value))
    return;

  v8SetReturnValue(info, value);
}

template <typename ElementType>
void setScriptableObjectProperty(
    const AtomicString& name,
    v8::Local<v8::Value> value,
    const v8::PropertyCallbackInfo<v8::Value>& info) {
  ASSERT(!value.IsEmpty());
  // Don't intercept any of the properties of the HTMLPluginElement.
  v8::Local<v8::String> v8Name = v8String(info.GetIsolate(), name);
  if (v8CallBoolean(
          info.Holder()->Has(info.GetIsolate()->GetCurrentContext(), v8Name)))
    return;

  HTMLPlugInElement* impl = ElementType::toImpl(info.Holder());
  RefPtr<SharedPersistent<v8::Object>> wrapper = impl->pluginWrapper();
  if (!wrapper)
    return;

  v8::Local<v8::Object> instance = wrapper->newLocal(info.GetIsolate());

  if (instance.IsEmpty())
    return;

  // FIXME: The gTalk pepper plugin is the only plugin to make use of
  // SetProperty and that is being deprecated. This can be removed as soon as
  // it goes away.
  // Call SetProperty on a pepper plugin's scriptable object. Note that we
  // never set the return value here which would indicate that the plugin has
  // intercepted the SetProperty call, which means that the property on the
  // DOM element will also be set. For plugin's that don't intercept the call
  // (all except gTalk) this makes no difference at all. For gTalk the fact
  // that the property on the DOM element also gets set is inconsequential.
  v8CallBoolean(instance->CreateDataProperty(
      info.GetIsolate()->GetCurrentContext(), v8Name, value));
  v8SetReturnValue(info, value);
}

}  // namespace

void V8HTMLEmbedElement::namedPropertyGetterCustom(
    const AtomicString& name,
    const v8::PropertyCallbackInfo<v8::Value>& info) {
  UseCounter::count(currentExecutionContext(info.GetIsolate()),
                    UseCounter::HTMLEmbedElementGetter);
  getScriptableObjectProperty<V8HTMLEmbedElement>(name, info);
}

void V8HTMLObjectElement::namedPropertyGetterCustom(
    const AtomicString& name,
    const v8::PropertyCallbackInfo<v8::Value>& info) {
  UseCounter::count(currentExecutionContext(info.GetIsolate()),
                    UseCounter::HTMLObjectElementGetter);
  getScriptableObjectProperty<V8HTMLObjectElement>(name, info);
}

void V8HTMLEmbedElement::namedPropertySetterCustom(
    const AtomicString& name,
    v8::Local<v8::Value> value,
    const v8::PropertyCallbackInfo<v8::Value>& info) {
  UseCounter::count(currentExecutionContext(info.GetIsolate()),
                    UseCounter::HTMLEmbedElementSetter);
  setScriptableObjectProperty<V8HTMLEmbedElement>(name, value, info);
}

void V8HTMLObjectElement::namedPropertySetterCustom(
    const AtomicString& name,
    v8::Local<v8::Value> value,
    const v8::PropertyCallbackInfo<v8::Value>& info) {
  UseCounter::count(currentExecutionContext(info.GetIsolate()),
                    UseCounter::HTMLObjectElementSetter);
  setScriptableObjectProperty<V8HTMLObjectElement>(name, value, info);
}

}  // namespace blink