/* * Copyright (C) 2011 Apple 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: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. 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 LayerChangesFlusher_h #define LayerChangesFlusher_h #include <windows.h> #include <wtf/HashSet.h> #include <wtf/Noncopyable.h> namespace WebCore { class AbstractCACFLayerTreeHost; class LayerChangesFlusher { WTF_MAKE_NONCOPYABLE(LayerChangesFlusher); public: static LayerChangesFlusher& singleton(); void flushPendingLayerChangesSoon(AbstractCACFLayerTreeHost*); void cancelPendingFlush(AbstractCACFLayerTreeHost*); private: LayerChangesFlusher(); ~LayerChangesFlusher(); static LRESULT CALLBACK hookCallback(int code, WPARAM, LPARAM); LRESULT hookFired(int code, WPARAM, LPARAM); void setHook(); void removeHook(); HashSet<AbstractCACFLayerTreeHost*> m_hostsWithChangesToFlush; HHOOK m_hook; bool m_isCallingHosts; }; } // namespace WebCore #endif // LayerChangesFlusher_h