1 /*

     2  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)

     3  *           (C) 2000 Simon Hausmann <hausmann@kde.org>

     4  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.

     5  *

     6  * This library is free software; you can redistribute it and/or

     7  * modify it under the terms of the GNU Library General Public

     8  * License as published by the Free Software Foundation; either

     9  * version 2 of the License, or (at your option) any later version.

    10  *

    11  * This library is distributed in the hope that it will be useful,

    12  * but WITHOUT ANY WARRANTY; without even the implied warranty of

    13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

    14  * Library General Public License for more details.

    15  *

    16  * You should have received a copy of the GNU Library General Public License

    17  * along with this library; see the file COPYING.LIB.  If not, write to

    18  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,

    19  * Boston, MA 02110-1301, USA.

    20  *

    21  */

    22 

    23 #ifndef RenderFrameSet_h

    24 #define RenderFrameSet_h

    25 

    26 #include "RenderBox.h"

    27 

    28 namespace WebCore {

    29 

    30 class HTMLFrameSetElement;

    31 class MouseEvent;

    32 

    33 enum FrameEdge { LeftFrameEdge, RightFrameEdge, TopFrameEdge, BottomFrameEdge };

    34 

    35 struct FrameEdgeInfo {

    36     FrameEdgeInfo(bool preventResize = false, bool allowBorder = true)

    37         : m_preventResize(4)

    38         , m_allowBorder(4)

    39     {

    40         m_preventResize.fill(preventResize);

    41         m_allowBorder.fill(allowBorder);

    42     }

    43 

    44     bool preventResize(FrameEdge edge) const { return m_preventResize[edge]; }

    45     bool allowBorder(FrameEdge edge) const { return m_allowBorder[edge]; }

    46 

    47     void setPreventResize(FrameEdge edge, bool preventResize) { m_preventResize[edge] = preventResize; }

    48     void setAllowBorder(FrameEdge edge, bool allowBorder) { m_allowBorder[edge] = allowBorder; }

    49 

    50 private:

    51     Vector<bool> m_preventResize;

    52     Vector<bool> m_allowBorder;

    53 };

    54 

    55 class RenderFrameSet : public RenderBox {

    56 public:

    57     RenderFrameSet(HTMLFrameSetElement*);

    58     virtual ~RenderFrameSet();

    59 

    60     const RenderObjectChildList* children() const { return &m_children; }

    61     RenderObjectChildList* children() { return &m_children; }

    62 

    63     FrameEdgeInfo edgeInfo() const;

    64 

    65     bool userResize(MouseEvent*);

    66 

    67     bool isResizingRow() const;

    68     bool isResizingColumn() const;

    69 

    70     bool canResizeRow(const IntPoint&) const;

    71     bool canResizeColumn(const IntPoint&) const;

    72 

    73 private:

    74     static const int noSplit = -1;

    75 

    76     class GridAxis : public Noncopyable {

    77     public:

    78         GridAxis();

    79         void resize(int);

    80         Vector<int> m_sizes;

    81         Vector<int> m_deltas;

    82         Vector<bool> m_preventResize;

    83         Vector<bool> m_allowBorder;

    84         int m_splitBeingResized;

    85         int m_splitResizeOffset;

    86     };

    87 

    88     virtual RenderObjectChildList* virtualChildren() { return children(); }

    89     virtual const RenderObjectChildList* virtualChildren() const { return children(); }

    90 

    91     virtual const char* renderName() const { return "RenderFrameSet"; }

    92     virtual bool isFrameSet() const { return true; }

    93 

    94     virtual void layout();

    95     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);

    96     virtual void paint(PaintInfo&, int tx, int ty);

    97     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const;

    98 

    99     inline HTMLFrameSetElement* frameSet() const;

   100 

   101     bool flattenFrameSet() const;

   102 

   103     void setIsResizing(bool);

   104 

   105     void layOutAxis(GridAxis&, const Length*, int availableSpace);

   106     void computeEdgeInfo();

   107     void fillFromEdgeInfo(const FrameEdgeInfo& edgeInfo, int r, int c);

   108     void positionFrames();

   109     void positionFramesWithFlattening();

   110 

   111     int splitPosition(const GridAxis&, int split) const;

   112     int hitTestSplit(const GridAxis&, int position) const;

   113 

   114     void startResizing(GridAxis&, int position);

   115     void continueResizing(GridAxis&, int position);

   116 

   117     void paintRowBorder(const PaintInfo&, const IntRect&);

   118     void paintColumnBorder(const PaintInfo&, const IntRect&);

   119 

   120     RenderObjectChildList m_children;

   121 

   122     GridAxis m_rows;

   123     GridAxis m_cols;

   124 

   125     bool m_isResizing;

   126     bool m_isChildResizing;

   127 };

   128 

   129 

   130 inline RenderFrameSet* toRenderFrameSet(RenderObject* object)

   131 {

   132     ASSERT(!object || object->isFrameSet());

   133     return static_cast<RenderFrameSet*>(object);

   134 }

   135 

   136 // This will catch anyone doing an unnecessary cast.

   137 void toRenderFrameSet(const RenderFrameSet*);

   138 

   139 } // namespace WebCore

   140 

   141 #endif // RenderFrameSet_h