1 files changed, 85 insertions, 0 deletions
diff --git a/Source/WebCore/page/scrolling/ScrollingStateOverflowScrollingNode.cpp b/Source/WebCore/page/scrolling/ScrollingStateOverflowScrollingNode.cpp
new file mode 100644
index 000000000..346459a71
--- /dev/null
+++ b/Source/WebCore/page/scrolling/ScrollingStateOverflowScrollingNode.cpp
@@ -0,0 +1,85 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "ScrollingStateOverflowScrollingNode.h"
+
+#if ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)
+
+#include "ScrollingStateTree.h"
+#include "TextStream.h"
+
+namespace WebCore {
+
+Ref<ScrollingStateOverflowScrollingNode> ScrollingStateOverflowScrollingNode::create(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
+{
+    return adoptRef(*new ScrollingStateOverflowScrollingNode(stateTree, nodeID));
+}
+
+ScrollingStateOverflowScrollingNode::ScrollingStateOverflowScrollingNode(ScrollingStateTree& stateTree, ScrollingNodeID nodeID)
+    : ScrollingStateScrollingNode(stateTree, OverflowScrollingNode, nodeID)
+{
+}
+
+ScrollingStateOverflowScrollingNode::ScrollingStateOverflowScrollingNode(const ScrollingStateOverflowScrollingNode& stateNode, ScrollingStateTree& adoptiveTree)
+    : ScrollingStateScrollingNode(stateNode, adoptiveTree)
+{
+    if (hasChangedProperty(ScrolledContentsLayer))
+        setScrolledContentsLayer(stateNode.scrolledContentsLayer().toRepresentation(adoptiveTree.preferredLayerRepresentation()));
+}
+
+ScrollingStateOverflowScrollingNode::~ScrollingStateOverflowScrollingNode()
+{
+}
+
+Ref<ScrollingStateNode> ScrollingStateOverflowScrollingNode::clone(ScrollingStateTree& adoptiveTree)
+{
+    return adoptRef(*new ScrollingStateOverflowScrollingNode(*this, adoptiveTree));
+}
+    
+void ScrollingStateOverflowScrollingNode::setScrolledContentsLayer(const LayerRepresentation& layerRepresentation)
+{
+    if (layerRepresentation == m_scrolledContentsLayer)
+        return;
+    
+    m_scrolledContentsLayer = layerRepresentation;
+    setPropertyChanged(ScrolledContentsLayer);
+}
+
+void ScrollingStateOverflowScrollingNode::dumpProperties(TextStream& ts, int indent, ScrollingStateTreeAsTextBehavior behavior) const
+{
+    ts << "(" << "Overflow scrolling node" << "\n";
+    
+    ScrollingStateScrollingNode::dumpProperties(ts, indent, behavior);
+    
+    if ((behavior & ScrollingStateTreeAsTextBehaviorIncludeLayerIDs) && m_scrolledContentsLayer.layerID()) {
+        writeIndent(ts, indent + 1);
+        ts << "(scrolled contents layer " << m_scrolledContentsLayer.layerID() << ")\n";
+    }
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(ASYNC_SCROLLING) || USE(COORDINATED_GRAPHICS)