--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/webengine/osswebengine/WebCore/rendering/CounterNode.h Mon Mar 30 12:54:55 2009 +0300
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2005 Allan Sandfeld Jensen (kde@carewolf.com)
+ * Copyright (C) 2006, 2007 Apple Inc. All rights reserved.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this library; see the file COPYING.LIB. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301, USA.
+ *
+*/
+
+#ifndef CounterNode_h
+#define CounterNode_h
+
+#include <wtf/Noncopyable.h>
+
+// This implements a counter tree that is used for finding parents in counters() lookup,
+// and for propagating count changes when nodes are added or removed.
+
+// Parents represent unique counters and their scope, which are created either explicitly
+// by "counter-reset" style rules or implicitly by referring to a counter that is not in scope.
+// Such nodes are tagged as "reset" nodes, although they are not all due to "counter-reset".
+
+// Not that render tree children are often counter tree siblings due to counter scoping rules.
+
+namespace WebCore {
+
+class RenderObject;
+
+class CounterNode : Noncopyable {
+public:
+ CounterNode(RenderObject*, bool isReset, int value);
+
+ bool isReset() const { return m_isReset; }
+ int value() const { return m_value; }
+ int countInParent() const { return m_countInParent; }
+ RenderObject* renderer() const { return m_renderer; }
+
+ CounterNode* parent() const { return m_parent; }
+ CounterNode* previousSibling() const { return m_previousSibling; }
+ CounterNode* nextSibling() const { return m_nextSibling; }
+ CounterNode* firstChild() const { return m_firstChild; }
+ CounterNode* lastChild() const { return m_lastChild; }
+
+ void insertAfter(CounterNode* newChild, CounterNode* beforeChild);
+ void removeChild(CounterNode*);
+
+private:
+ int computeCountInParent() const;
+ void recount();
+
+ bool m_isReset;
+ int m_value;
+ int m_countInParent;
+ RenderObject* m_renderer;
+
+ CounterNode* m_parent;
+ CounterNode* m_previousSibling;
+ CounterNode* m_nextSibling;
+ CounterNode* m_firstChild;
+ CounterNode* m_lastChild;
+};
+
+} // namespace WebCore
+
+#ifndef NDEBUG
+// Outside the WebCore namespace for ease of invocation from gdb.
+void showTree(const WebCore::CounterNode*);
+#endif
+
+#endif // CounterNode_h