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1/*
2 * Copyright (C) 2004, 2006, 2010, 2011 Apple Computer, 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 COMPUTER, INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#import "config.h"
27#import "PlatformWheelEvent.h"
28
29#import "PlatformMouseEvent.h"
30#import "Scrollbar.h"
31#import "WebCoreSystemInterface.h"
32#import <wtf/UnusedParam.h>
33
34namespace WebCore {
35
36static PlatformWheelEventPhase momentumPhaseForEvent(NSEvent *event)
37{
38    uint32_t phase = PlatformWheelEventPhaseNone;
39
40#if !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
41    if ([event momentumPhase] & NSEventPhaseBegan)
42        phase |= PlatformWheelEventPhaseBegan;
43    if ([event momentumPhase] & NSEventPhaseStationary)
44        phase |= PlatformWheelEventPhaseStationary;
45    if ([event momentumPhase] & NSEventPhaseChanged)
46        phase |= PlatformWheelEventPhaseChanged;
47    if ([event momentumPhase] & NSEventPhaseEnded)
48        phase |= PlatformWheelEventPhaseEnded;
49    if ([event momentumPhase] & NSEventPhaseCancelled)
50        phase |= PlatformWheelEventPhaseCancelled;
51#else
52    switch (wkGetNSEventMomentumPhase(event)) {
53    case wkEventPhaseNone:
54        phase = PlatformWheelEventPhaseNone;
55        break;
56    case wkEventPhaseBegan:
57        phase = PlatformWheelEventPhaseBegan;
58        break;
59    case wkEventPhaseChanged:
60        phase = PlatformWheelEventPhaseChanged;
61        break;
62    case wkEventPhaseEnded:
63        phase = PlatformWheelEventPhaseEnded;
64        break;
65    }
66#endif
67
68    return static_cast<PlatformWheelEventPhase>(phase);
69}
70
71static PlatformWheelEventPhase phaseForEvent(NSEvent *event)
72{
73#if !defined(BUILDING_ON_LEOPARD) && !defined(BUILDING_ON_SNOW_LEOPARD)
74    uint32_t phase = PlatformWheelEventPhaseNone;
75    if ([event phase] & NSEventPhaseBegan)
76        phase |= PlatformWheelEventPhaseBegan;
77    if ([event phase] & NSEventPhaseStationary)
78        phase |= PlatformWheelEventPhaseStationary;
79    if ([event phase] & NSEventPhaseChanged)
80        phase |= PlatformWheelEventPhaseChanged;
81    if ([event phase] & NSEventPhaseEnded)
82        phase |= PlatformWheelEventPhaseEnded;
83    if ([event phase] & NSEventPhaseCancelled)
84        phase |= PlatformWheelEventPhaseCancelled;
85    return static_cast<PlatformWheelEventPhase>(phase);
86#else
87    UNUSED_PARAM(event);
88    return PlatformWheelEventPhaseNone;
89#endif
90}
91
92PlatformWheelEvent::PlatformWheelEvent(NSEvent* event, NSView *windowView)
93    : m_position(pointForEvent(event, windowView))
94    , m_globalPosition(globalPointForEvent(event))
95    , m_granularity(ScrollByPixelWheelEvent)
96    , m_isAccepted(false)
97    , m_shiftKey([event modifierFlags] & NSShiftKeyMask)
98    , m_ctrlKey([event modifierFlags] & NSControlKeyMask)
99    , m_altKey([event modifierFlags] & NSAlternateKeyMask)
100    , m_metaKey([event modifierFlags] & NSCommandKeyMask)
101    , m_phase(phaseForEvent(event))
102    , m_momentumPhase(momentumPhaseForEvent(event))
103    , m_timestamp([event timestamp])
104{
105    BOOL continuous;
106    wkGetWheelEventDeltas(event, &m_deltaX, &m_deltaY, &continuous);
107    if (continuous) {
108        m_wheelTicksX = m_deltaX / static_cast<float>(Scrollbar::pixelsPerLineStep());
109        m_wheelTicksY = m_deltaY / static_cast<float>(Scrollbar::pixelsPerLineStep());
110        m_hasPreciseScrollingDeltas = true;
111    } else {
112        m_wheelTicksX = m_deltaX;
113        m_wheelTicksY = m_deltaY;
114        m_deltaX *= static_cast<float>(Scrollbar::pixelsPerLineStep());
115        m_deltaY *= static_cast<float>(Scrollbar::pixelsPerLineStep());
116        m_hasPreciseScrollingDeltas = false;
117    }
118}
119
120} // namespace WebCore
121