115 lines
3.8 KiB
C++
115 lines
3.8 KiB
C++
/*
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* Copyright (C) 2020 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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#include "config.h"
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#include "ScrollingTreeGestureState.h"
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#if ENABLE(ASYNC_SCROLLING)
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#include "PlatformWheelEvent.h"
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#include "ScrollingTree.h"
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namespace WebCore {
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ScrollingTreeGestureState::ScrollingTreeGestureState(ScrollingTree& scrollingTree)
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: m_scrollingTree(scrollingTree)
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{
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}
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void ScrollingTreeGestureState::receivedWheelEvent(const PlatformWheelEvent& event)
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{
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if (event.isGestureStart()) {
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clearAllNodes();
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return;
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}
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}
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bool ScrollingTreeGestureState::handleGestureCancel(const PlatformWheelEvent& event)
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{
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if (event.isGestureCancel()) {
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if (m_mayBeginNodeID)
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m_scrollingTree.handleWheelEventPhase(*m_mayBeginNodeID, PlatformWheelEventPhase::Cancelled);
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return true;
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}
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return false;
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}
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void ScrollingTreeGestureState::nodeDidHandleEvent(ScrollingNodeID nodeID, const PlatformWheelEvent& event)
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{
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switch (event.phase()) {
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case PlatformWheelEventPhase::MayBegin:
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m_mayBeginNodeID = nodeID;
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m_scrollingTree.handleWheelEventPhase(nodeID, event.phase());
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break;
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case PlatformWheelEventPhase::Cancelled:
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// handleGestureCancel() should have been called first.
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ASSERT_NOT_REACHED();
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break;
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case PlatformWheelEventPhase::Began:
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m_activeNodeID = nodeID;
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m_scrollingTree.handleWheelEventPhase(nodeID, event.phase());
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break;
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case PlatformWheelEventPhase::Ended:
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if (m_activeNodeID)
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m_scrollingTree.handleWheelEventPhase(*m_activeNodeID, event.phase());
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break;
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case PlatformWheelEventPhase::Changed:
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case PlatformWheelEventPhase::Stationary:
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case PlatformWheelEventPhase::None:
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break;
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}
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switch (event.momentumPhase()) {
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case PlatformWheelEventPhase::MayBegin:
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case PlatformWheelEventPhase::Cancelled:
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ASSERT_NOT_REACHED();
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break;
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case PlatformWheelEventPhase::Began:
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m_activeNodeID = nodeID;
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m_scrollingTree.handleWheelEventPhase(nodeID, event.momentumPhase());
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break;
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case PlatformWheelEventPhase::Ended:
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if (m_activeNodeID)
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m_scrollingTree.handleWheelEventPhase(*m_activeNodeID, event.momentumPhase());
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break;
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case PlatformWheelEventPhase::Changed:
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case PlatformWheelEventPhase::Stationary:
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case PlatformWheelEventPhase::None:
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break;
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}
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}
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void ScrollingTreeGestureState::clearAllNodes()
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{
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m_mayBeginNodeID = 0;
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m_activeNodeID = 0;
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}
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};
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#endif // ENABLE(ASYNC_SCROLLING)
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