File: PlatformMouseEvent.h

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/*
 * Copyright (C) 2004, 2005, 2006, 2009 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 COMPUTER, 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 COMPUTER, 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 PlatformMouseEvent_h
#define PlatformMouseEvent_h

#include "platform/PlatformEvent.h"
#include "platform/geometry/FloatPoint.h"
#include "platform/geometry/IntPoint.h"
#include "public/platform/WebGestureEvent.h"
#include "public/platform/WebPointerProperties.h"
#include "wtf/text/WTFString.h"

namespace blink {

class PlatformMouseEvent : public PlatformEvent {
 public:
  enum SyntheticEventType {
    // Real mouse input events or synthetic events that behave just like real
    // events
    RealOrIndistinguishable,
    // Synthetic mouse events derived from touch input
    FromTouch,
    // Synthetic mouse events generated without a position, for example those
    // generated from keyboard input.
    Positionless,
  };

  PlatformMouseEvent() : PlatformMouseEvent(PlatformEvent::MouseMoved) {}

  explicit PlatformMouseEvent(EventType type)
      : PlatformEvent(type),
        m_clickCount(0),
        m_synthesized(RealOrIndistinguishable) {}

  PlatformMouseEvent(const IntPoint& position,
                     const IntPoint& globalPosition,
                     WebPointerProperties::Button button,
                     EventType type,
                     int clickCount,
                     Modifiers modifiers,
                     TimeTicks timestamp)
      : PlatformEvent(type, modifiers, timestamp),
        m_position(position),
        m_globalPosition(globalPosition),
        m_clickCount(clickCount),
        m_synthesized(RealOrIndistinguishable) {
    m_pointerProperties.button = button;
  }

  PlatformMouseEvent(const IntPoint& position,
                     const IntPoint& globalPosition,
                     WebPointerProperties::Button button,
                     EventType type,
                     int clickCount,
                     Modifiers modifiers,
                     SyntheticEventType synthesized,
                     TimeTicks timestamp,
                     WebPointerProperties::PointerType pointerType =
                         WebPointerProperties::PointerType::Unknown)
      : PlatformEvent(type, modifiers, timestamp),
        m_position(position),
        m_globalPosition(globalPosition),
        m_clickCount(clickCount),
        m_synthesized(synthesized) {
    m_pointerProperties.pointerType = pointerType;
    m_pointerProperties.button = button;
  }

#if INSIDE_BLINK
  PlatformMouseEvent(const WebGestureEvent& gestureEvent,
                     WebPointerProperties::Button button,
                     EventType type,
                     int clickCount,
                     Modifiers modifiers,
                     SyntheticEventType synthesized,
                     TimeTicks timestamp,
                     WebPointerProperties::PointerType pointerType =
                         WebPointerProperties::PointerType::Unknown)
      : PlatformMouseEvent(flooredIntPoint(gestureEvent.positionInRootFrame()),
                           IntPoint(gestureEvent.globalX, gestureEvent.globalY),
                           button,
                           type,
                           clickCount,
                           modifiers,
                           synthesized,
                           timestamp,
                           pointerType) {}
#endif

  const WebPointerProperties& pointerProperties() const {
    return m_pointerProperties;
  }
  const IntPoint& position() const { return m_position; }
  const IntPoint& globalPosition() const { return m_globalPosition; }
  const IntPoint& movementDelta() const { return m_movementDelta; }

  int clickCount() const { return m_clickCount; }
  bool fromTouch() const { return m_synthesized == FromTouch; }
  SyntheticEventType getSyntheticEventType() const { return m_synthesized; }

  const String& region() const { return m_region; }
  void setRegion(const String& region) { m_region = region; }

 protected:
  WebPointerProperties m_pointerProperties;

  // In local root frame coordinates. (Except possibly if the Widget under
  // the mouse is a popup, see FIXME in PlatformMouseEventBuilder).
  IntPoint m_position;

  // In screen coordinates.
  IntPoint m_globalPosition;

  IntPoint m_movementDelta;
  int m_clickCount;
  SyntheticEventType m_synthesized;

  // For canvas hit region.
  // TODO(zino): This might make more sense to put in HitTestResults or
  // some other part of MouseEventWithHitTestResults, but for now it's
  // most convenient to stash it here. Please see: http://crbug.com/592947.
  String m_region;
};

}  // namespace blink

#endif  // PlatformMouseEvent_h