1/*
2 * Copyright (c) 2016 Igalia S.L.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 * * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#pragma once
32
33#include "ScrollAnimator.h"
34#include "Timer.h"
35
36namespace WebCore {
37
38class ScrollAnimation;
39
40class ScrollAnimatorGeneric final : public ScrollAnimator {
41public:
42 explicit ScrollAnimatorGeneric(ScrollableArea&);
43 virtual ~ScrollAnimatorGeneric();
44
45private:
46#if ENABLE(SMOOTH_SCROLLING)
47 bool scroll(ScrollbarOrientation, ScrollGranularity, float step, float multiplier) override;
48#endif
49 void scrollToOffsetWithoutAnimation(const FloatPoint&, ScrollClamping) override;
50 void willEndLiveResize() override;
51
52 bool handleWheelEvent(const PlatformWheelEvent&) override;
53
54 void didAddVerticalScrollbar(Scrollbar*) override;
55 void didAddHorizontalScrollbar(Scrollbar*) override;
56 void willRemoveVerticalScrollbar(Scrollbar*) override;
57 void willRemoveHorizontalScrollbar(Scrollbar*) override;
58
59 void mouseEnteredContentArea() override;
60 void mouseExitedContentArea() override;
61 void mouseMovedInContentArea() override;
62 void contentAreaDidShow() override;
63 void contentAreaDidHide() override;
64 void notifyContentAreaScrolled(const FloatSize& delta) override;
65 void lockOverlayScrollbarStateToHidden(bool) override;
66
67 void updatePosition(FloatPoint&&);
68
69 void overlayScrollbarAnimationTimerFired();
70 void showOverlayScrollbars();
71 void hideOverlayScrollbars();
72 void updateOverlayScrollbarsOpacity();
73
74 FloatPoint computeVelocity();
75
76#if ENABLE(SMOOTH_SCROLLING)
77 void ensureSmoothScrollingAnimation();
78
79 std::unique_ptr<ScrollAnimation> m_smoothAnimation;
80#endif
81 std::unique_ptr<ScrollAnimation> m_kineticAnimation;
82 Vector<PlatformWheelEvent> m_scrollHistory;
83 Scrollbar* m_horizontalOverlayScrollbar { nullptr };
84 Scrollbar* m_verticalOverlayScrollbar { nullptr };
85 bool m_overlayScrollbarsLocked { false };
86 Timer m_overlayScrollbarAnimationTimer;
87 double m_overlayScrollbarAnimationSource { 0 };
88 double m_overlayScrollbarAnimationTarget { 0 };
89 double m_overlayScrollbarAnimationCurrent { 0 };
90 MonotonicTime m_overlayScrollbarAnimationStartTime;
91 MonotonicTime m_overlayScrollbarAnimationEndTime;
92};
93
94} // namespace WebCore
95