/platform/external/webkit/WebCore/bindings/v8/custom/V8MessagePortCustom.cpp

  1/*
  2 * Copyright (C) 2009 Google Inc. All rights reserved.
  3 *
  4 * Redistribution and use in source and binary forms, with or without
  5 * modification, are permitted provided that the following conditions are
  6 * met:
  7 *
  8 *     * Redistributions of source code must retain the above copyright
  9 * notice, this list of conditions and the following disclaimer.
 10 *     * Redistributions in binary form must reproduce the above
 11 * copyright notice, this list of conditions and the following disclaimer
 12 * in the documentation and/or other materials provided with the
 13 * distribution.
 14 *     * Neither the name of Google Inc. nor the names of its
 15 * contributors may be used to endorse or promote products derived from
 16 * this software without specific prior written permission.
 17 *
 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 29 */
 30
 31#include "config.h"
 32
 33#include "ExceptionCode.h"
 34#include "MessagePort.h"
 35#include "SerializedScriptValue.h"
 36#include "V8Binding.h"
 37#include "V8MessagePortCustom.h"
 38#include "V8MessagePort.h"
 39#include "V8Proxy.h"
 40#include "V8Utilities.h"
 41#include "WorkerContextExecutionProxy.h"
 42
 43namespace WebCore {
 44
 45v8::Handle<v8::Value> V8MessagePort::addEventListenerCallback(const v8::Arguments& args)
 46{
 47    INC_STATS("DOM.MessagePort.addEventListener()");
 48    MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
 49    RefPtr<EventListener> listener = V8DOMWrapper::getEventListener(messagePort, args[1], false, ListenerFindOrCreate);
 50    if (listener) {
 51        String type = toWebCoreString(args[0]);
 52        bool useCapture = args[2]->BooleanValue();
 53        messagePort->addEventListener(type, listener, useCapture);
 54
 55        createHiddenDependency(args.Holder(), args[1], cacheIndex);
 56    }
 57    return v8::Undefined();
 58}
 59
 60v8::Handle<v8::Value> V8MessagePort::removeEventListenerCallback(const v8::Arguments& args)
 61{
 62    INC_STATS("DOM.MessagePort.removeEventListener()");
 63    MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
 64    RefPtr<EventListener> listener = V8DOMWrapper::getEventListener(messagePort, args[1], false, ListenerFindOnly);
 65    if (listener) {
 66        String type = toWebCoreString(args[0]);
 67        bool useCapture = args[2]->BooleanValue();
 68        messagePort->removeEventListener(type, listener.get(), useCapture);
 69
 70        removeHiddenDependency(args.Holder(), args[1], cacheIndex);
 71    }
 72
 73    return v8::Undefined();
 74}
 75
 76v8::Handle<v8::Value> V8MessagePort::postMessageCallback(const v8::Arguments& args)
 77{
 78    INC_STATS("DOM.MessagePort.postMessage");
 79    MessagePort* messagePort = V8MessagePort::toNative(args.Holder());
 80    RefPtr<SerializedScriptValue> message = SerializedScriptValue::create(args[0]);
 81    MessagePortArray portArray;
 82    if (args.Length() > 1) {
 83        if (!getMessagePortArray(args[1], portArray))
 84            return v8::Undefined();
 85    }
 86    ExceptionCode ec = 0;
 87    messagePort->postMessage(message.release(), &portArray, ec);
 88    return throwError(ec);
 89}
 90
 91bool getMessagePortArray(v8::Local<v8::Value> value, MessagePortArray& portArray)
 92{
 93    if (isUndefinedOrNull(value)) {
 94        portArray.resize(0);
 95        return true;
 96    }
 97
 98    if (!value->IsObject()) {
 99        throwError("MessagePortArray argument must be an object");
100        return false;
101    }
102    uint32_t length = 0;
103    v8::Local<v8::Object> ports = v8::Local<v8::Object>::Cast(value);
104
105    if (value->IsArray()) {
106        v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value);
107        length = array->Length();
108    } else {
109        // Sequence-type object - get the length attribute
110        v8::Local<v8::Value> sequenceLength = ports->Get(v8::String::New("length"));
111        if (!sequenceLength->IsNumber()) {
112            throwError("MessagePortArray argument has no length attribute");
113            return false;
114        }
115        length = sequenceLength->Uint32Value();
116    }
117    portArray.resize(length);
118
119    for (unsigned int i = 0; i < length; ++i) {
120        v8::Local<v8::Value> port = ports->Get(v8::Integer::New(i));
121        // Validation of non-null objects, per HTML5 spec 8.3.3.
122        if (isUndefinedOrNull(port)) {
123            throwError(INVALID_STATE_ERR);
124            return false;
125        }
126        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
127        if (!V8MessagePort::HasInstance(port)) {
128            throwError("MessagePortArray argument must contain only MessagePorts");
129            return false;
130        }
131        portArray[i] = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(port));
132    }
133    return true;
134}
135
136} // namespace WebCore