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Diffstat (limited to 'Source/WebCore/page/scrolling/ScrollingTreeFrameScrollingNode.h')
-rw-r--r-- | Source/WebCore/page/scrolling/ScrollingTreeFrameScrollingNode.h | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/Source/WebCore/page/scrolling/ScrollingTreeFrameScrollingNode.h b/Source/WebCore/page/scrolling/ScrollingTreeFrameScrollingNode.h new file mode 100644 index 000000000..43488c4fa --- /dev/null +++ b/Source/WebCore/page/scrolling/ScrollingTreeFrameScrollingNode.h @@ -0,0 +1,103 @@ +/* + * 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; + +protected: + ScrollingTreeFrameScrollingNode(ScrollingTree&, 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(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) |