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
preventResizeFrameEdgeInfo44 bool preventResize(FrameEdge edge) const { return m_preventResize[edge]; }
allowBorderFrameEdgeInfo45 bool allowBorder(FrameEdge edge) const { return m_allowBorder[edge]; }
46
setPreventResizeFrameEdgeInfo47 void setPreventResize(FrameEdge edge, bool preventResize) { m_preventResize[edge] = preventResize; }
setAllowBorderFrameEdgeInfo48 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
children()60 const RenderObjectChildList* children() const { return &m_children; }
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 {
77 WTF_MAKE_NONCOPYABLE(GridAxis);
78 public:
79 GridAxis();
80 void resize(int);
81 Vector<int> m_sizes;
82 Vector<int> m_deltas;
83 Vector<bool> m_preventResize;
84 Vector<bool> m_allowBorder;
85 int m_splitBeingResized;
86 int m_splitResizeOffset;
87 };
88
virtualChildren()89 virtual RenderObjectChildList* virtualChildren() { return children(); }
virtualChildren()90 virtual const RenderObjectChildList* virtualChildren() const { return children(); }
91
renderName()92 virtual const char* renderName() const { return "RenderFrameSet"; }
isFrameSet()93 virtual bool isFrameSet() const { return true; }
94
95 virtual void layout();
96 virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, int x, int y, int tx, int ty, HitTestAction);
97 virtual void paint(PaintInfo&, int tx, int ty);
98 virtual bool isChildAllowed(RenderObject*, RenderStyle*) const;
99
100 inline HTMLFrameSetElement* frameSet() const;
101
102 bool flattenFrameSet() const;
103
104 void setIsResizing(bool);
105
106 void layOutAxis(GridAxis&, const Length*, int availableSpace);
107 void computeEdgeInfo();
108 void fillFromEdgeInfo(const FrameEdgeInfo& edgeInfo, int r, int c);
109 void positionFrames();
110 void positionFramesWithFlattening();
111
112 int splitPosition(const GridAxis&, int split) const;
113 int hitTestSplit(const GridAxis&, int position) const;
114
115 void startResizing(GridAxis&, int position);
116 void continueResizing(GridAxis&, int position);
117
118 void paintRowBorder(const PaintInfo&, const IntRect&);
119 void paintColumnBorder(const PaintInfo&, const IntRect&);
120
121 RenderObjectChildList m_children;
122
123 GridAxis m_rows;
124 GridAxis m_cols;
125
126 bool m_isResizing;
127 bool m_isChildResizing;
128 };
129
130
toRenderFrameSet(RenderObject * object)131 inline RenderFrameSet* toRenderFrameSet(RenderObject* object)
132 {
133 ASSERT(!object || object->isFrameSet());
134 return static_cast<RenderFrameSet*>(object);
135 }
136
137 // This will catch anyone doing an unnecessary cast.
138 void toRenderFrameSet(const RenderFrameSet*);
139
140 } // namespace WebCore
141
142 #endif // RenderFrameSet_h
143