| /* |
| * Copyright (C) 2019 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 "ScrollingTreeScrollingNodeDelegate.h" |
| |
| #if ENABLE(ASYNC_SCROLLING) && PLATFORM(MAC) |
| |
| #include "ScrollController.h" |
| |
| OBJC_CLASS NSScrollerImp; |
| |
| namespace WebCore { |
| |
| class FloatPoint; |
| class FloatSize; |
| class IntPoint; |
| class ScrollingStateScrollingNode; |
| class ScrollingTreeScrollingNode; |
| class ScrollingTree; |
| |
| class ScrollingTreeScrollingNodeDelegateMac : public ScrollingTreeScrollingNodeDelegate, private ScrollControllerClient { |
| public: |
| explicit ScrollingTreeScrollingNodeDelegateMac(ScrollingTreeScrollingNode&); |
| virtual ~ScrollingTreeScrollingNodeDelegateMac(); |
| |
| bool handleWheelEvent(const PlatformWheelEvent&); |
| |
| #if ENABLE(CSS_SCROLL_SNAP) |
| void updateScrollSnapPoints(ScrollEventAxis, const Vector<LayoutUnit>&, const Vector<ScrollOffsetRange<LayoutUnit>>&); |
| void setActiveScrollSnapIndexForAxis(ScrollEventAxis, unsigned); |
| bool activeScrollSnapIndexDidChange() const; |
| unsigned activeScrollSnapIndexForAxis(ScrollEventAxis) const; |
| bool isScrollSnapInProgress() const; |
| #endif |
| |
| void updateFromStateNode(const ScrollingStateScrollingNode&); |
| void updateScrollbarPainters(); |
| |
| void deferWheelEventTestCompletionForReason(WheelEventTestMonitor::ScrollableAreaIdentifier, WheelEventTestMonitor::DeferReason) const override; |
| void removeWheelEventTestCompletionDeferralForReason(WheelEventTestMonitor::ScrollableAreaIdentifier, WheelEventTestMonitor::DeferReason) const override; |
| |
| private: |
| bool isAlreadyPinnedInDirectionOfGesture(const PlatformWheelEvent&, ScrollEventAxis); |
| |
| // ScrollControllerClient. |
| bool allowsHorizontalStretching(const PlatformWheelEvent&) override; |
| bool allowsVerticalStretching(const PlatformWheelEvent&) override; |
| IntSize stretchAmount() override; |
| bool pinnedInDirection(const FloatSize&) override; |
| bool canScrollHorizontally() override; |
| bool canScrollVertically() override; |
| bool shouldRubberBandInDirection(ScrollDirection) override; |
| void immediateScrollBy(const FloatSize&) override; |
| void immediateScrollByWithoutContentEdgeConstraints(const FloatSize&) override; |
| void stopSnapRubberbandTimer() override; |
| void adjustScrollPositionToBoundsIfNecessary() override; |
| |
| #if ENABLE(CSS_SCROLL_SNAP) |
| FloatPoint scrollOffset() const override; |
| void immediateScrollOnAxis(ScrollEventAxis, float delta) override; |
| float pageScaleFactor() const override; |
| void startScrollSnapTimer() override; |
| void stopScrollSnapTimer() override; |
| LayoutSize scrollExtent() const override; |
| FloatSize viewportSize() const override; |
| #endif |
| |
| void releaseReferencesToScrollerImpsOnTheMainThread(); |
| |
| ScrollController m_scrollController; |
| |
| RetainPtr<NSScrollerImp> m_verticalScrollerImp; |
| RetainPtr<NSScrollerImp> m_horizontalScrollerImp; |
| }; |
| |
| } // namespace WebCore |
| |
| #endif // PLATFORM(MAC) && ENABLE(ASYNC_SCROLLING) |