62 lines
2.4 KiB
C++
62 lines
2.4 KiB
C++
/*
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* Copyright (C) 2021 Apple Inc. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
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* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#pragma once
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#include "KeyboardEvent.h"
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#include "KeyboardScroll.h"
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#include "RectEdges.h"
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#include "ScrollAnimator.h"
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namespace WebCore {
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class KeyboardScrollingAnimator {
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WTF_MAKE_NONCOPYABLE(KeyboardScrollingAnimator);
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WTF_MAKE_FAST_ALLOCATED;
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public:
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KeyboardScrollingAnimator(ScrollAnimator&, ScrollController&);
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bool beginKeyboardScrollGesture(KeyboardEvent&);
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void handleKeyUpEvent();
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void updateKeyboardScrollPosition(MonotonicTime);
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private:
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void stopKeyboardScrollAnimation();
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RectEdges<bool> scrollableDirectionsFromOffset(FloatPoint) const;
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std::optional<KeyboardScroll> keyboardScrollForKeyboardEvent(KeyboardEvent&) const;
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float scrollDistance(ScrollDirection, ScrollGranularity) const;
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ScrollAnimator& m_scrollAnimator;
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ScrollController& m_scrollController;
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std::optional<WebCore::KeyboardScroll> m_currentKeyboardScroll;
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bool m_scrollTriggeringKeyIsPressed { false };
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FloatSize m_velocity;
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MonotonicTime m_timeAtLastFrame;
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FloatPoint m_idealPositionForMinimumTravel;
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FloatPoint m_idealPosition;
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};
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} // namespace WebCore
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