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/*
* Copyright (C) 2021 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 INC. AND ITS 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 APPLE INC. OR ITS 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.
*/
#pragma once
#include "KeyboardEvent.h"
#include "KeyboardScroll.h" // FIXME: This is a layering violation.
#include "RectEdges.h"
#include "ScrollAnimator.h"
namespace WebCore {
class PlatformKeyboardEvent;
enum class KeyboardScrollingKey : uint8_t {
LeftArrow,
RightArrow,
UpArrow,
DownArrow,
Space,
PageUp,
PageDown
};
const std::optional<KeyboardScrollingKey> keyboardScrollingKeyForKeyboardEvent(const KeyboardEvent&);
const std::optional<ScrollDirection> scrollDirectionForKeyboardEvent(const KeyboardEvent&);
const std::optional<ScrollGranularity> scrollGranularityForKeyboardEvent(const KeyboardEvent&);
class KeyboardScrollingAnimator : public CanMakeWeakPtr<KeyboardScrollingAnimator> {
WTF_MAKE_NONCOPYABLE(KeyboardScrollingAnimator);
WTF_MAKE_FAST_ALLOCATED;
public:
KeyboardScrollingAnimator(ScrollAnimator&, ScrollingEffectsController&);
bool beginKeyboardScrollGesture(ScrollDirection, ScrollGranularity);
void handleKeyUpEvent();
void updateKeyboardScrollPosition(MonotonicTime);
private:
void stopKeyboardScrollAnimation();
RectEdges<bool> scrollableDirectionsFromPosition(FloatPoint) const;
std::optional<KeyboardScroll> makeKeyboardScroll(ScrollDirection, ScrollGranularity) const;
float scrollDistance(ScrollDirection, ScrollGranularity) const;
ScrollAnimator& m_scrollAnimator;
ScrollingEffectsController& m_scrollController;
std::optional<WebCore::KeyboardScroll> m_currentKeyboardScroll;
bool m_scrollTriggeringKeyIsPressed { false };
FloatSize m_velocity;
MonotonicTime m_timeAtLastFrame;
FloatPoint m_idealPositionForMinimumTravel;
FloatPoint m_idealPosition;
};
} // namespace WebCore
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