/* * 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. */ #ifndef V8EventListenerList_h #define V8EventListenerList_h #include <v8.h> #include <wtf/Vector.h> #include <wtf/HashMap.h> namespace WebCore { class V8EventListener; class V8EventListenerListIterator; // This is a container for V8EventListener objects that uses the identity hash of the v8::Object to // speed up lookups class V8EventListenerList { public: // Because v8::Object identity hashes are not guaranteed to be unique, we unfortunately can't just map // an int to V8EventListener. Instead we define a HashMap of int to Vector of V8EventListener // called a ListenerMultiMap. typedef Vector<V8EventListener*>* Values; struct ValuesTraits : HashTraits<Values> { static const bool needsDestruction = true; }; typedef HashMap<int, Values, DefaultHash<int>::Hash, HashTraits<int>, ValuesTraits> ListenerMultiMap; V8EventListenerList(); ~V8EventListenerList(); friend class V8EventListenerListIterator; typedef V8EventListenerListIterator iterator; iterator begin(); iterator end(); void add(V8EventListener*); void remove(V8EventListener*); V8EventListener* find(v8::Local<v8::Object>, bool isAttribute); void clear(); size_t size() { return m_table.size(); } private: ListenerMultiMap m_table; // we also keep a reverse mapping of V8EventListener to v8::Object identity hash, // in order to speed up removal by V8EventListener HashMap<V8EventListener*, int> m_reverseTable; }; class V8EventListenerListIterator { public: ~V8EventListenerListIterator(); void operator++(); bool operator==(const V8EventListenerListIterator&); bool operator!=(const V8EventListenerListIterator&); V8EventListener* operator*(); private: friend class V8EventListenerList; explicit V8EventListenerListIterator(V8EventListenerList*); V8EventListenerListIterator(V8EventListenerList*, bool shouldSeekToEnd); void seekToEnd(); V8EventListenerList* m_list; V8EventListenerList::ListenerMultiMap::iterator m_iter; size_t m_vectorIndex; }; } // namespace WebCore #endif // V8EventListenerList_h