C++ MessagePortArray::append方法代码示例

void fillMessagePortArray(JSC::ExecState* exec, JSC::JSValue value, MessagePortArray& portArray)
{
    // Convert from the passed-in JS array-like object to a MessagePortArray.
    // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL spec and section 8.3.3 of the HTML5 spec.
    if (value.isUndefinedOrNull()) {
        portArray.resize(0);
        return;
    }

    // Validation of sequence types, per WebIDL spec 4.1.13.
    unsigned length;
    JSObject* object = toJSSequence(exec, value, length);
    if (exec->hadException())
        return;

    for (unsigned i = 0 ; i < length; ++i) {
        JSValue value = object->get(exec, i);
        if (exec->hadException())
            return;
        // Validation of non-null objects, per HTML5 spec 10.3.3.
        if (value.isUndefinedOrNull()) {
            setDOMException(exec, DATA_CLONE_ERR);
            return;
        }

        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
        RefPtr<MessagePort> port = toMessagePort(value);
        if (!port) {
            throwTypeError(exec);
            return;
        }
        portArray.append(port.release());
    }
}

// FIXME: remove this when we update the ObjC bindings (bug #28774).
void Worker::postMessage(PassRefPtr<SerializedScriptValue> message, MessagePort* port, ExceptionCode& ec)
{
    MessagePortArray ports;
    if (port)
        ports.append(port);
    postMessage(message, &ports, ec);
}

void MessagePort::postMessage(RefPtr<SerializedScriptValue>&& message, MessagePort* port, ExceptionCode& ec)
{
    MessagePortArray ports;
    if (port)
        ports.append(port);
    postMessage(WTFMove(message), &ports, ec);
}

void MessageEvent::initMessageEvent(const AtomicString& type, bool canBubble, bool cancelable, PassRefPtr<SerializedScriptValue> data, const String& origin, const String& lastEventId, DOMWindow* source, MessagePort* port)
{
    MessagePortArray* ports = 0;
    if (port) {
        ports = new MessagePortArray();
        ports->append(port);
    }
    initMessageEvent(type, canBubble, cancelable, data, origin, lastEventId, source, ports);
}

bool extractTransferables(v8::Local<v8::Value> value, int argumentIndex, MessagePortArray& ports, ArrayBufferArray& arrayBuffers, ExceptionState& exceptionState, v8::Isolate* isolate)
{
    if (isUndefinedOrNull(value)) {
        ports.resize(0);
        arrayBuffers.resize(0);
        return true;
    }

    uint32_t length = 0;
    if (value->IsArray()) {
        v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value);
        length = array->Length();
    } else if (toV8Sequence(value, length, isolate).IsEmpty()) {
        exceptionState.throwTypeError(ExceptionMessages::notAnArrayTypeArgumentOrValue(argumentIndex + 1));
        return false;
    }

    v8::Local<v8::Object> transferrables = v8::Local<v8::Object>::Cast(value);

    // Validate the passed array of transferrables.
    for (unsigned int i = 0; i < length; ++i) {
        v8::Local<v8::Value> transferrable = transferrables->Get(i);
        // Validation of non-null objects, per HTML5 spec 10.3.3.
        if (isUndefinedOrNull(transferrable)) {
            exceptionState.throwDOMException(DataCloneError, "Value at index " + String::number(i) + " is an untransferable " + (transferrable->IsUndefined() ? "'undefined'" : "'null'") + " value.");
            return false;
        }
        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
        if (V8MessagePort::hasInstance(transferrable, isolate)) {
            RefPtr<MessagePort> port = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(transferrable));
            // Check for duplicate MessagePorts.
            if (ports.contains(port)) {
                exceptionState.throwDOMException(DataCloneError, "Message port at index " + String::number(i) + " is a duplicate of an earlier port.");
                return false;
            }
            ports.append(port.release());
        } else if (V8ArrayBuffer::hasInstance(transferrable, isolate)) {
            RefPtr<ArrayBuffer> arrayBuffer = V8ArrayBuffer::toNative(v8::Handle<v8::Object>::Cast(transferrable));
            if (arrayBuffers.contains(arrayBuffer)) {
                exceptionState.throwDOMException(DataCloneError, "ArrayBuffer at index " + String::number(i) + " is a duplicate of an earlier ArrayBuffer.");
                return false;
            }
            arrayBuffers.append(arrayBuffer.release());
        } else {
            exceptionState.throwDOMException(DataCloneError, "Value at index " + String::number(i) + " does not have a transferable type.");
            return false;
        }
    }
    return true;
}

void fillMessagePortArray(JSC::ExecState* exec, JSC::JSValue value, MessagePortArray& portArray, ArrayBufferArray& arrayBuffers)
{
    // Convert from the passed-in JS array-like object to a MessagePortArray.
    // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL spec and section 8.3.3 of the HTML5 spec.
    if (value.isUndefinedOrNull()) {
        portArray.resize(0);
        arrayBuffers.resize(0);
        return;
    }

    // Validation of sequence types, per WebIDL spec 4.1.13.
    unsigned length = 0;
    JSObject* object = toJSSequence(exec, value, length);
    if (exec->hadException())
        return;

    for (unsigned i = 0 ; i < length; ++i) {
        JSValue value = object->get(exec, i);
        if (exec->hadException())
            return;
        // Validation of non-null objects, per HTML5 spec 10.3.3.
        if (value.isUndefinedOrNull()) {
            setDOMException(exec, INVALID_STATE_ERR);
            return;
        }

        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
        RefPtr<MessagePort> port = toMessagePort(value);
        if (port) {
            // Check for duplicate ports.
            if (portArray.contains(port)) {
#if MODIFY(ENGINE) //[2014.03.05][infraware][jungong16] : fix to issue. http://www.w3.org/TR/webmessaging/#dom-window-postmessage
                setDOMException(exec, DATA_CLONE_ERR);
#else
                setDOMException(exec, INVALID_STATE_ERR);
#endif
                return;
            }
            portArray.append(port.release());
        } else {
            RefPtr<ArrayBuffer> arrayBuffer = toArrayBuffer(value);
            if (arrayBuffer)
                arrayBuffers.append(arrayBuffer);
            else {
                throwTypeError(exec);
                return;
            }
        }
    }
}

bool extractTransferables(v8::Local<v8::Value> value, MessagePortArray& ports, ArrayBufferArray& arrayBuffers)
{
    if (isUndefinedOrNull(value)) {
        ports.resize(0);
        arrayBuffers.resize(0);
        return true;
    }

    if (!value->IsObject()) {
        throwError("TransferArray argument must be an object");
        return false;
    }
    uint32_t length = 0;
    v8::Local<v8::Object> transferrables = v8::Local<v8::Object>::Cast(value);

    if (value->IsArray()) {
        v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value);
        length = array->Length();
    } else {
        // Sequence-type object - get the length attribute
        v8::Local<v8::Value> sequenceLength = transferrables->Get(v8::String::New("length"));
        if (!sequenceLength->IsNumber()) {
            throwError("TransferArray argument has no length attribute");
            return false;
        }
        length = sequenceLength->Uint32Value();
    }

    // Validate the passed array of transferrables.
    for (unsigned int i = 0; i < length; ++i) {
        v8::Local<v8::Value> transferrable = transferrables->Get(i);
        // Validation of non-null objects, per HTML5 spec 10.3.3.
        if (isUndefinedOrNull(transferrable)) {
            throwError(DATA_CLONE_ERR);
            return false;
        }
        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
        if (V8MessagePort::HasInstance(transferrable))
            ports.append(V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(transferrable)));
        else if (V8ArrayBuffer::HasInstance(transferrable))
            arrayBuffers.append(V8ArrayBuffer::toNative(v8::Handle<v8::Object>::Cast(transferrable)));
        else {
            throwError("TransferArray argument must contain only Transferables");
            return false;
        }
    }
    return true;
}

void fillMessagePortArray(JSC::ExecState* exec, JSC::JSValue value, MessagePortArray& portArray, ArrayBufferArray& arrayBuffers)
{
    // Convert from the passed-in JS array-like object to a MessagePortArray.
    // Also validates the elements per sections 4.1.13 and 4.1.15 of the WebIDL spec and section 8.3.3 of the HTML5 spec.
    if (value.isUndefinedOrNull()) {
        portArray.resize(0);
        arrayBuffers.resize(0);
        return;
    }

    // Validation of sequence types, per WebIDL spec 4.1.13.
    unsigned length = 0;
    JSObject* object = toJSSequence(exec, value, length);
    if (exec->hadException())
        return;

    for (unsigned i = 0 ; i < length; ++i) {
        JSValue value = object->get(exec, i);
        if (exec->hadException())
            return;
        // Validation of non-null objects, per HTML5 spec 10.3.3.
        if (value.isUndefinedOrNull()) {
            setDOMException(exec, INVALID_STATE_ERR);
            return;
        }

        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
        RefPtr<MessagePort> port = JSMessagePort::toWrapped(value);
        if (port) {
            // Check for duplicate ports.
            if (portArray.contains(port)) {
                setDOMException(exec, INVALID_STATE_ERR);
                return;
            }
            portArray.append(port.release());
        } else {
            RefPtr<ArrayBuffer> arrayBuffer = toArrayBuffer(value);
            if (arrayBuffer)
                arrayBuffers.append(arrayBuffer);
            else {
                throwTypeError(exec);
                return;
            }
        }
    }
}

bool extractTransferables(v8::Local<v8::Value> value, MessagePortArray& ports, ArrayBufferArray& arrayBuffers, v8::Isolate* isolate)
{
    if (isUndefinedOrNull(value)) {
        ports.resize(0);
        arrayBuffers.resize(0);
        return true;
    }

    uint32_t length = 0;
    if (value->IsArray()) {
        v8::Local<v8::Array> array = v8::Local<v8::Array>::Cast(value);
        length = array->Length();
    } else {
        if (toV8Sequence(value, length).IsEmpty())
            return false;
    }

    v8::Local<v8::Object> transferrables = v8::Local<v8::Object>::Cast(value);

    // Validate the passed array of transferrables.
    for (unsigned int i = 0; i < length; ++i) {
        v8::Local<v8::Value> transferrable = transferrables->Get(i);
        // Validation of non-null objects, per HTML5 spec 10.3.3.
        if (isUndefinedOrNull(transferrable)) {
            setDOMException(INVALID_STATE_ERR, isolate);
            return false;
        }
        // Validation of Objects implementing an interface, per WebIDL spec 4.1.15.
        if (V8MessagePort::HasInstance(transferrable)) {
            RefPtr<MessagePort> port = V8MessagePort::toNative(v8::Handle<v8::Object>::Cast(transferrable));
            // Check for duplicate MessagePorts.
            if (ports.contains(port)) {
                setDOMException(INVALID_STATE_ERR, isolate);
                return false;
            }
            ports.append(port.release());
        } else if (V8ArrayBuffer::HasInstance(transferrable))
            arrayBuffers.append(V8ArrayBuffer::toNative(v8::Handle<v8::Object>::Cast(transferrable)));
        else {
            throwTypeError();
            return false;
        }
    }
    return true;
}