third_party/WebKit/Source/bindings/core/v8/custom/V8MessageEventCustom.cpp

/*
 * Copyright (C) 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
 * copyright notice, this list of conditions and the following disclaimer
 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * 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 "bindings/core/v8/V8MessageEvent.h"

#include "bindings/core/v8/SerializedScriptValue.h"
#include "bindings/core/v8/SerializedScriptValueFactory.h"
#include "bindings/core/v8/V8ArrayBuffer.h"
#include "bindings/core/v8/V8Binding.h"
#include "bindings/core/v8/V8Blob.h"
#include "bindings/core/v8/V8MessagePort.h"
#include "bindings/core/v8/V8PrivateProperty.h"
#include "bindings/core/v8/V8Window.h"

namespace blink {

void V8MessageEvent::dataAttributeGetterCustom(
    const v8::FunctionCallbackInfo<v8::Value>& info) {
  ScriptState* scriptState = ScriptState::current(info.GetIsolate());
  auto privateCachedData =
      V8PrivateProperty::getMessageEventCachedData(info.GetIsolate());
  v8::Local<v8::Value> cachedData =
      privateCachedData.get(scriptState->context(), info.Holder());
  if (!cachedData.IsEmpty()) {
    v8SetReturnValue(info, cachedData);
    return;
  }

  MessageEvent* event = V8MessageEvent::toImpl(info.Holder());

  v8::Local<v8::Value> result;
  switch (event->getDataType()) {
    case MessageEvent::DataTypeScriptValue:
      result = event->dataAsScriptValue().v8ValueFor(scriptState);
      if (result.IsEmpty())
        result = v8::Null(info.GetIsolate());
      break;

    case MessageEvent::DataTypeSerializedScriptValue:
      if (SerializedScriptValue* serializedValue =
              event->dataAsSerializedScriptValue()) {
        MessagePortArray ports = event->ports();
        result = serializedValue->deserialize(info.GetIsolate(), &ports);
      } else {
        result = v8::Null(info.GetIsolate());
      }
      break;

    case MessageEvent::DataTypeString:
      result = v8String(info.GetIsolate(), event->dataAsString());
      break;

    case MessageEvent::DataTypeBlob:
      result = toV8(event->dataAsBlob(), info.Holder(), info.GetIsolate());
      break;

    case MessageEvent::DataTypeArrayBuffer:
      result =
          toV8(event->dataAsArrayBuffer(), info.Holder(), info.GetIsolate());
      break;
  }

  // Store the result as a private value so this callback returns the cached
  // result in future invocations.
  privateCachedData.set(scriptState->context(), info.Holder(), result);
  v8SetReturnValue(info, result);
}

void V8MessageEvent::initMessageEventMethodCustom(
    const v8::FunctionCallbackInfo<v8::Value>& info) {
  ExceptionState exceptionState(info.GetIsolate(),
                                ExceptionState::ExecutionContext,
                                "MessageEvent", "initMessageEvent");
  MessageEvent* event = V8MessageEvent::toImpl(info.Holder());
  TOSTRING_VOID(V8StringResource<>, typeArg, info[0]);
  bool canBubbleArg = false;
  bool cancelableArg = false;
  if (!v8Call(info[1]->BooleanValue(info.GetIsolate()->GetCurrentContext()),
              canBubbleArg) ||
      !v8Call(info[2]->BooleanValue(info.GetIsolate()->GetCurrentContext()),
              cancelableArg))
    return;
  v8::Local<v8::Value> dataArg = info[3];
  TOSTRING_VOID(V8StringResource<>, originArg, info[4]);
  TOSTRING_VOID(V8StringResource<>, lastEventIdArg, info[5]);
  EventTarget* sourceArg = toEventTarget(info.GetIsolate(), info[6]);
  MessagePortArray* portArray = nullptr;
  const int portArrayIndex = 7;
  if (!isUndefinedOrNull(info[portArrayIndex])) {
    portArray = new MessagePortArray;
    *portArray = toMemberNativeArray<MessagePort>(
        info[portArrayIndex], portArrayIndex + 1, info.GetIsolate(),
        exceptionState);
    if (exceptionState.hadException())
      return;
  }
  event->initMessageEvent(
      typeArg, canBubbleArg, cancelableArg,
      ScriptValue(ScriptState::current(info.GetIsolate()), dataArg), originArg,
      lastEventIdArg, sourceArg, portArray);
}

}  // namespace blink