webkitgtk-2.16.5HEADwebkitgtk-2.16.5master

1 files changed, 95 insertions, 0 deletions

diff --git a/Source/WebCore/page/scrolling/ScrollingTreeNode.cpp b/Source/WebCore/page/scrolling/ScrollingTreeNode.cpp
new file mode 100644
index 000000000..0f6616d0f
--- /dev/null
+++ b/Source/WebCore/page/scrolling/ScrollingTreeNode.cpp
@@ -0,0 +1,95 @@
+/*
+ * 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.
+ */
+
+#include "config.h"
+#include "ScrollingTreeNode.h"
+
+#if ENABLE(ASYNC_SCROLLING)
+
+#include "ScrollingStateTree.h"
+#include "TextStream.h"
+
+namespace WebCore {
+
+ScrollingTreeNode::ScrollingTreeNode(ScrollingTree& scrollingTree, ScrollingNodeType nodeType, ScrollingNodeID nodeID)
+    : m_scrollingTree(scrollingTree)
+    , m_nodeType(nodeType)
+    , m_nodeID(nodeID)
+    , m_parent(nullptr)
+{
+}
+
+ScrollingTreeNode::~ScrollingTreeNode()
+{
+}
+
+void ScrollingTreeNode::appendChild(Ref<ScrollingTreeNode>&& childNode)
+{
+    childNode->setParent(this);
+
+    if (!m_children)
+        m_children = std::make_unique<Vector<RefPtr<ScrollingTreeNode>>>();
+    m_children->append(WTFMove(childNode));
+}
+
+void ScrollingTreeNode::removeChild(ScrollingTreeNode& node)
+{
+    if (!m_children)
+        return;
+
+    size_t index = m_children->find(&node);
+
+    // The index will be notFound if the node to remove is a deeper-than-1-level descendant or
+    // if node is the root state node.
+    if (index != notFound) {
+        m_children->remove(index);
+        return;
+    }
+
+    for (auto& child : *m_children)
+        child->removeChild(node);
+}
+
+void ScrollingTreeNode::dumpProperties(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
+{
+    if (behavior & ScrollingStateTreeAsTextBehaviorIncludeNodeIDs)
+        ts.dumpProperty("nodeID", scrollingNodeID());
+}
+
+void ScrollingTreeNode::dump(TextStream& ts, ScrollingStateTreeAsTextBehavior behavior) const
+{
+    dumpProperties(ts, behavior);
+
+    if (m_children) {
+        for (auto& child : *m_children) {
+            TextStream::GroupScope scope(ts);
+            child->dump(ts, behavior);
+        }
+    }
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(ASYNC_SCROLLING)