| /* |
| * Copyright (C) 2014 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 |
| |
| #if ENABLE(ASYNC_SCROLLING) |
| |
| #include "ScrollingTreeScrollingNode.h" |
| |
| namespace WebCore { |
| |
| class PlatformWheelEvent; |
| class ScrollingTree; |
| class ScrollingStateScrollingNode; |
| |
| class ScrollingTreeFrameScrollingNode : public ScrollingTreeScrollingNode { |
| public: |
| virtual ~ScrollingTreeFrameScrollingNode(); |
| |
| void commitStateBeforeChildren(const ScrollingStateNode&) override; |
| |
| // FIXME: We should implement this when we support ScrollingTreeScrollingNodes as children. |
| void updateLayersAfterAncestorChange(const ScrollingTreeNode& /*changedNode*/, const FloatRect& /*fixedPositionRect*/, const FloatSize& /*cumulativeDelta*/) override { } |
| |
| void handleWheelEvent(const PlatformWheelEvent&) override = 0; |
| void setScrollPosition(const FloatPoint&) override; |
| void setScrollPositionWithoutContentEdgeConstraints(const FloatPoint&) override = 0; |
| |
| void updateLayersAfterViewportChange(const FloatRect& fixedPositionRect, double scale) override = 0; |
| void updateLayersAfterDelegatedScroll(const FloatPoint&) override { } |
| |
| SynchronousScrollingReasons synchronousScrollingReasons() const { return m_synchronousScrollingReasons; } |
| bool shouldUpdateScrollLayerPositionSynchronously() const { return m_synchronousScrollingReasons; } |
| bool fixedElementsLayoutRelativeToFrame() const { return m_fixedElementsLayoutRelativeToFrame; } |
| |
| FloatSize viewToContentsOffset(const FloatPoint& scrollPosition) const; |
| FloatRect layoutViewportForScrollPosition(const FloatPoint& visibleContentOrigin, float scale) const; |
| |
| FloatRect fixedPositionRect() { return FloatRect(lastCommittedScrollPosition(), scrollableAreaSize()); }; |
| |
| protected: |
| ScrollingTreeFrameScrollingNode(ScrollingTree&, ScrollingNodeType, ScrollingNodeID); |
| |
| void scrollBy(const FloatSize&); |
| void scrollByWithoutContentEdgeConstraints(const FloatSize&); |
| |
| float frameScaleFactor() const { return m_frameScaleFactor; } |
| int headerHeight() const { return m_headerHeight; } |
| int footerHeight() const { return m_footerHeight; } |
| float topContentInset() const { return m_topContentInset; } |
| |
| FloatRect layoutViewport() const { return m_layoutViewport; }; |
| void setLayoutViewport(const FloatRect& r) { m_layoutViewport = r; }; |
| |
| FloatPoint minLayoutViewportOrigin() const { return m_minLayoutViewportOrigin; } |
| FloatPoint maxLayoutViewportOrigin() const { return m_maxLayoutViewportOrigin; } |
| |
| ScrollBehaviorForFixedElements scrollBehaviorForFixedElements() const { return m_behaviorForFixed; } |
| |
| private: |
| void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override; |
| |
| FloatRect m_layoutViewport; |
| FloatPoint m_minLayoutViewportOrigin; |
| FloatPoint m_maxLayoutViewportOrigin; |
| |
| float m_frameScaleFactor { 1 }; |
| float m_topContentInset { 0 }; |
| |
| int m_headerHeight { 0 }; |
| int m_footerHeight { 0 }; |
| |
| SynchronousScrollingReasons m_synchronousScrollingReasons { 0 }; |
| ScrollBehaviorForFixedElements m_behaviorForFixed { StickToDocumentBounds }; |
| |
| bool m_fixedElementsLayoutRelativeToFrame { false }; |
| }; |
| |
| } // namespace WebCore |
| |
| SPECIALIZE_TYPE_TRAITS_SCROLLING_NODE(ScrollingTreeFrameScrollingNode, isFrameScrollingNode()) |
| |
| #endif // ENABLE(ASYNC_SCROLLING) |