--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/WebCore/rendering/RenderFrameSet.h	Fri Sep 17 09:02:29 2010 +0300
@@ -0,0 +1,141 @@
+/*
+ * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
+ *           (C) 2000 Simon Hausmann <hausmann@kde.org>
+ * Copyright (C) 2006, 2008 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 RenderFrameSet_h
+#define RenderFrameSet_h
+
+#include "RenderBox.h"
+
+namespace WebCore {
+
+class HTMLFrameSetElement;
+class MouseEvent;
+
+enum FrameEdge { LeftFrameEdge, RightFrameEdge, TopFrameEdge, BottomFrameEdge };
+
+struct FrameEdgeInfo {
+    FrameEdgeInfo(bool preventResize = false, bool allowBorder = true)
+        : m_preventResize(4)
+        , m_allowBorder(4)
+    {
+        m_preventResize.fill(preventResize);
+        m_allowBorder.fill(allowBorder);
+    }
+
+    bool preventResize(FrameEdge edge) const { return m_preventResize[edge]; }
+    bool allowBorder(FrameEdge edge) const { return m_allowBorder[edge]; }
+
+    void setPreventResize(FrameEdge edge, bool preventResize) { m_preventResize[edge] = preventResize; }
+    void setAllowBorder(FrameEdge edge, bool allowBorder) { m_allowBorder[edge] = allowBorder; }
+
+private:
+    Vector<bool> m_preventResize;
+    Vector<bool> m_allowBorder;
+};
+
+class RenderFrameSet : public RenderBox {
+public:
+    RenderFrameSet(HTMLFrameSetElement*);
+    virtual ~RenderFrameSet();
+
+    const RenderObjectChildList* children() const { return &m_children; }
+    RenderObjectChildList* children() { return &m_children; }
+
+    FrameEdgeInfo edgeInfo() const;
+
+    bool userResize(MouseEvent*);
+
+    bool isResizingRow() const;
+    bool isResizingColumn() const;
+
+    bool canResizeRow(const IntPoint&) const;
+    bool canResizeColumn(const IntPoint&) const;
+
+private:
+    static const int noSplit = -1;
+
+    class GridAxis : public Noncopyable {
+    public:
+        GridAxis();
+        void resize(int);
+        Vector<int> m_sizes;
+        Vector<int> m_deltas;
+        Vector<bool> m_preventResize;
+        Vector<bool> m_allowBorder;
+        int m_splitBeingResized;
+        int m_splitResizeOffset;
+    };
+
+    virtual RenderObjectChildList* virtualChildren() { return children(); }
+    virtual const RenderObjectChildList* virtualChildren() const { return children(); }
+
+    virtual const char* renderName() const { return "RenderFrameSet"; }
+    virtual bool isFrameSet() const { return true; }
+
+    virtual void layout();
+    virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
+    virtual void paint(PaintInfo&, int tx, int ty);
+    virtual bool isChildAllowed(RenderObject*, RenderStyle*) const;
+
+    inline HTMLFrameSetElement* frameSet() const;
+
+    bool flattenFrameSet() const;
+
+    void setIsResizing(bool);
+
+    void layOutAxis(GridAxis&, const Length*, int availableSpace);
+    void computeEdgeInfo();
+    void fillFromEdgeInfo(const FrameEdgeInfo& edgeInfo, int r, int c);
+    void positionFrames();
+    void positionFramesWithFlattening();
+
+    int splitPosition(const GridAxis&, int split) const;
+    int hitTestSplit(const GridAxis&, int position) const;
+
+    void startResizing(GridAxis&, int position);
+    void continueResizing(GridAxis&, int position);
+
+    void paintRowBorder(const PaintInfo&, const IntRect&);
+    void paintColumnBorder(const PaintInfo&, const IntRect&);
+
+    RenderObjectChildList m_children;
+
+    GridAxis m_rows;
+    GridAxis m_cols;
+
+    bool m_isResizing;
+    bool m_isChildResizing;
+};
+
+
+inline RenderFrameSet* toRenderFrameSet(RenderObject* object)
+{
+    ASSERT(!object || object->isFrameSet());
+    return static_cast<RenderFrameSet*>(object);
+}
+
+// This will catch anyone doing an unnecessary cast.
+void toRenderFrameSet(const RenderFrameSet*);
+
+} // namespace WebCore
+
+#endif // RenderFrameSet_h