diff options
Diffstat (limited to 'Source/WebCore/page/scrolling/ScrollingStateStickyNode.h')
-rw-r--r-- | Source/WebCore/page/scrolling/ScrollingStateStickyNode.h | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/Source/WebCore/page/scrolling/ScrollingStateStickyNode.h b/Source/WebCore/page/scrolling/ScrollingStateStickyNode.h new file mode 100644 index 000000000..63f908e76 --- /dev/null +++ b/Source/WebCore/page/scrolling/ScrollingStateStickyNode.h @@ -0,0 +1,69 @@ +/* + * 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(TextStream&, int indent, ScrollingStateTreeAsTextBehavior) const override; + + StickyPositionViewportConstraints m_constraints; +}; + +} // namespace WebCore + +SPECIALIZE_TYPE_TRAITS_SCROLLING_STATE_NODE(ScrollingStateStickyNode, isStickyNode()) + +#endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS) |