WebCore/RenderFrameSet.h

   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 "RenderContainer.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 {
  37     FrameEdgeInfo(bool preventResize = false, bool allowBorder = true)
  38         : m_preventResize(4)
  39         , m_allowBorder(4)
  40     {
  41         m_preventResize.fill(preventResize);
  42         m_allowBorder.fill(allowBorder);
  43     }
  44
  45     bool preventResize(FrameEdge edge) const { return m_preventResize[edge]; }
  46     bool allowBorder(FrameEdge edge) const { return m_allowBorder[edge]; }
  47
  48     void setPreventResize(FrameEdge edge, bool preventResize) { m_preventResize[edge] = preventResize; }
  49     void setAllowBorder(FrameEdge edge, bool allowBorder) { m_allowBorder[edge] = allowBorder; }
  50
  51 private:
  52     Vector<bool> m_preventResize;
  53     Vector<bool> m_allowBorder;
  54 };
  55
  56 class RenderFrameSet : public RenderContainer {
  57 public:
  58     RenderFrameSet(HTMLFrameSetElement*);
  59     virtual ~RenderFrameSet();
  60
  61     virtual const char* renderName() const { return "RenderFrameSet"; }
  62     virtual bool isFrameSet() const { return true; }
  63
  64     virtual void layout();
  65     virtual void calcPrefWidths();
  66     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
  67     virtual void paint(PaintInfo& paintInfo, int tx, int ty);
  68     virtual bool isChildAllowed(RenderObject*, RenderStyle*) const;
  69
  70     FrameEdgeInfo edgeInfo() const;
  71
  72     bool userResize(MouseEvent*);
  73
  74     bool isResizingRow() const;
  75     bool isResizingColumn() const;
  76
  77     bool canResizeRow(const IntPoint&) const;
  78     bool canResizeColumn(const IntPoint&) const;
  79
  80     bool flattenFrameset() const;
  81
  82 private:
  83     static const int noSplit = -1;
  84
  85     class GridAxis : Noncopyable {
  86     public:
  87         GridAxis();
  88         void resize(int);
  89         Vector<int> m_sizes;
  90         Vector<int> m_deltas;
  91         Vector<bool> m_preventResize;
  92         Vector<bool> m_allowBorder;
  93         int m_splitBeingResized;
  94         int m_splitResizeOffset;
  95     };
  96
  97     inline HTMLFrameSetElement* frameSet() const;
  98
  99     bool canResize(const IntPoint&) const;
 100     void setIsResizing(bool);
 101
 102     void layOutAxis(GridAxis&, const Length*, int availableSpace);
 103     void computeEdgeInfo();
 104     void fillFromEdgeInfo(const FrameEdgeInfo& edgeInfo, int r, int c);
 105     void positionFrames();
 106     void positionFramesWithFlattening();
 107
 108     int splitPosition(const GridAxis&, int split) const;
 109     int hitTestSplit(const GridAxis&, int position) const;
 110
 111     void startResizing(GridAxis&, int position);
 112     void continueResizing(GridAxis&, int position);
 113
 114     void paintRowBorder(const PaintInfo& paintInfo, const IntRect& rect);
 115     void paintColumnBorder(const PaintInfo& paintInfo, const IntRect& rect);
 116
 117     GridAxis m_rows;
 118     GridAxis m_cols;
 119
 120     bool m_isResizing;
 121     bool m_isChildResizing;
 122 };
 123
 124 } // namespace WebCore
 125
 126 #endif // RenderFrameSet_h