webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 69 insertions, 0 deletions

diff --git a/Source/WebCore/page/scrolling/ScrollingStateStickyNode.h b/Source/WebCore/page/scrolling/ScrollingStateStickyNode.h
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+++ b/Source/WebCore/page/scrolling/ScrollingStateStickyNode.h
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+/*
+ * 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)