/* * 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 * 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. */ #ifndef V8Utilities_h #define V8Utilities_h #include <wtf/Forward.h> #include <v8.h> #include "OwnHandle.h" namespace WTF { class ArrayBuffer; } namespace WebCore { class EventListener; class Frame; class KURL; class MessagePort; class ScriptExecutionContext; class ScriptState; // Use an array to hold dependents. It works like a ref-counted scheme. A value can be added more than once to the DOM object. void createHiddenDependency(v8::Handle<v8::Object>, v8::Local<v8::Value>, int cacheIndex); void removeHiddenDependency(v8::Handle<v8::Object>, v8::Local<v8::Value>, int cacheIndex); // Combo create/remove, for generated event-handler-setter bindings: void transferHiddenDependency(v8::Handle<v8::Object>, EventListener* oldValue, v8::Local<v8::Value> newValue, int cacheIndex); KURL completeURL(const String& relativeURL); ScriptExecutionContext* getScriptExecutionContext(); void throwTypeMismatchException(); enum CallbackAllowedValueFlag { CallbackAllowUndefined = 1, CallbackAllowNull = 1 << 1 }; typedef unsigned CallbackAllowedValueFlags; class V8AuxiliaryContext { public: V8AuxiliaryContext(); virtual ~V8AuxiliaryContext(); private: v8::HandleScope m_handleScope; static v8::Persistent<v8::Context>& auxiliaryContext(); }; typedef WTF::Vector<RefPtr<MessagePort>, 1> MessagePortArray; typedef WTF::Vector<RefPtr<ArrayBuffer>, 1> ArrayBufferArray; // Helper function which pulls the values out of a JS sequence and into 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 and generates exceptions as appropriate. // Returns true if the array was filled, or false if the passed value was not of an appropriate type. bool extractTransferables(v8::Local<v8::Value>, MessagePortArray&, ArrayBufferArray&); bool getMessagePortArray(v8::Local<v8::Value>, MessagePortArray&); // 'FunctionOnly' is assumed for the created callback. template <typename V8CallbackType> PassRefPtr<V8CallbackType> createFunctionOnlyCallback(v8::Local<v8::Value> value, bool& succeeded, CallbackAllowedValueFlags acceptedValues = 0) { succeeded = true; if (value->IsUndefined() && (acceptedValues & CallbackAllowUndefined)) return 0; if (value->IsNull() && (acceptedValues & CallbackAllowNull)) return 0; if (!value->IsFunction()) { succeeded = false; throwTypeMismatchException(); return 0; } return V8CallbackType::create(value, getScriptExecutionContext()); } } // namespace WebCore #endif // V8Utilities_h