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/*
* Copyright (c) 2011, 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 PlatformGestureRecognizer_h
#define PlatformGestureRecognizer_h
namespace WebCore {
class EventHandler;
class PlatformGestureRecognizer;
class PlatformTouchEvent;
// A GestureRecognizer detects gestures occurring in the touch event.
// In response to a given touch event, the GestureRecognizer, updates
// its internal state and optionally dispatches synthetic events to the
// invoking EventHandler instance.
class PlatformGestureRecognizer {
protected:
PlatformGestureRecognizer();
public:
virtual ~PlatformGestureRecognizer();
// Invoked for each touch event that could contribute to the current gesture.
// Takes a PlatformTouchEvent and the EventHandler that originated it and which will also
// be the target of any generated synthetic event. Finally, |handled|
// specifies if the |event| was actually handled by |source| (by the JavaScript)
// Returns true if the event resulted in firing a synthetic event.
virtual bool processTouchEventForGesture(const PlatformTouchEvent&, EventHandler*, bool handled) = 0;
// Factory method for GestureManagers.
static PlatformGestureRecognizer* create();
};
} // namespace WebCore
#endif // PlatformGestureRecognizer_h
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