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      1 /*
      2  * Copyright (C) 2011 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef PlatformEvent_h
     27 #define PlatformEvent_h
     28 
     29 namespace WebCore {
     30 
     31 class PlatformEvent {
     32 public:
     33     enum Type {
     34         NoType = 0,
     35 
     36         // PlatformKeyboardEvent
     37         KeyDown,
     38         KeyUp,
     39         RawKeyDown,
     40         Char,
     41 
     42         // PlatformMouseEvent
     43         MouseMoved,
     44         MousePressed,
     45         MouseReleased,
     46         MouseScroll,
     47 
     48         // PlatformWheelEvent
     49         Wheel,
     50 
     51         // PlatformGestureEvent
     52         GestureScrollBegin,
     53         GestureScrollEnd,
     54         GestureScrollUpdate,
     55         GestureScrollUpdateWithoutPropagation,
     56         GestureTap,
     57         GestureTapUnconfirmed,
     58         GestureTapDown,
     59         GestureShowPress,
     60         GestureTapDownCancel,
     61         GestureTwoFingerTap,
     62         GestureLongPress,
     63         GestureLongTap,
     64         GesturePinchBegin,
     65         GesturePinchEnd,
     66         GesturePinchUpdate,
     67         GestureFlingStart,
     68 
     69         // PlatformTouchEvent
     70         TouchStart,
     71         TouchMove,
     72         TouchEnd,
     73         TouchCancel,
     74     };
     75 
     76     enum Modifiers {
     77         AltKey      = 1 << 0,
     78         CtrlKey     = 1 << 1,
     79         MetaKey     = 1 << 2,
     80         ShiftKey    = 1 << 3,
     81     };
     82 
     83     Type type() const { return static_cast<Type>(m_type); }
     84 
     85     bool shiftKey() const { return m_modifiers & ShiftKey; }
     86     bool ctrlKey() const { return m_modifiers & CtrlKey; }
     87     bool altKey() const { return m_modifiers & AltKey; }
     88     bool metaKey() const { return m_modifiers & MetaKey; }
     89 
     90     unsigned modifiers() const { return m_modifiers; }
     91 
     92     double timestamp() const { return m_timestamp; }
     93 
     94 protected:
     95     PlatformEvent()
     96         : m_type(NoType)
     97         , m_modifiers(0)
     98         , m_timestamp(0)
     99     {
    100     }
    101 
    102     explicit PlatformEvent(Type type)
    103         : m_type(type)
    104         , m_modifiers(0)
    105         , m_timestamp(0)
    106     {
    107     }
    108 
    109     PlatformEvent(Type type, Modifiers modifiers, double timestamp)
    110         : m_type(type)
    111         , m_modifiers(modifiers)
    112         , m_timestamp(timestamp)
    113     {
    114     }
    115 
    116     PlatformEvent(Type type, bool shiftKey, bool ctrlKey, bool altKey, bool metaKey, double timestamp)
    117         : m_type(type)
    118         , m_modifiers(0)
    119         , m_timestamp(timestamp)
    120     {
    121         if (shiftKey)
    122             m_modifiers |= ShiftKey;
    123         if (ctrlKey)
    124             m_modifiers |= CtrlKey;
    125         if (altKey)
    126             m_modifiers |= AltKey;
    127         if (metaKey)
    128             m_modifiers |= MetaKey;
    129     }
    130 
    131     // Explicit protected destructor so that people don't accidentally
    132     // delete a PlatformEvent.
    133     ~PlatformEvent()
    134     {
    135     }
    136 
    137     unsigned m_type;
    138     unsigned m_modifiers;
    139     double m_timestamp;
    140 };
    141 
    142 } // namespace WebCore
    143 
    144 #endif // PlatformEvent_h
    145