| /* |
| * Copyright (C) 2012 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) || USE(COORDINATED_GRAPHICS) |
| |
| #include "ScrollingConstraints.h" |
| #include "ScrollingStateNode.h" |
| |
| #include <wtf/Forward.h> |
| |
| namespace WebCore { |
| |
| class StickyPositionViewportConstraints; |
| |
| class ScrollingStateStickyNode final : public ScrollingStateNode { |
| public: |
| static Ref<ScrollingStateStickyNode> create(ScrollingStateTree&, ScrollingNodeID); |
| |
| Ref<ScrollingStateNode> clone(ScrollingStateTree&) override; |
| |
| virtual ~ScrollingStateStickyNode(); |
| |
| enum { |
| ViewportConstraints = NumStateNodeBits |
| }; |
| |
| WEBCORE_EXPORT void updateConstraints(const StickyPositionViewportConstraints&); |
| const StickyPositionViewportConstraints& viewportConstraints() const { return m_constraints; } |
| |
| private: |
| ScrollingStateStickyNode(ScrollingStateTree&, ScrollingNodeID); |
| ScrollingStateStickyNode(const ScrollingStateStickyNode&, ScrollingStateTree&); |
| |
| void reconcileLayerPositionForViewportRect(const LayoutRect& viewportRect, ScrollingLayerPositionAction) override; |
| |
| void dumpProperties(WTF::TextStream&, ScrollingStateTreeAsTextBehavior) const override; |
| |
| StickyPositionViewportConstraints m_constraints; |
| }; |
| |
| } // namespace WebCore |
| |
| SPECIALIZE_TYPE_TRAITS_SCROLLING_STATE_NODE(ScrollingStateStickyNode, isStickyNode()) |
| |
| #endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS) |