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#pragma once
24
25#include "RenderBox.h"
26
27namespace WebCore {
28
29class HTMLFrameSetElement;
30class MouseEvent;
31class RenderFrame;
32
33enum FrameEdge { LeftFrameEdge, RightFrameEdge, TopFrameEdge, BottomFrameEdge };
34
35struct FrameEdgeInfo {
36 explicit 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
50private:
51 Vector<bool> m_preventResize;
52 Vector<bool> m_allowBorder;
53};
54
55class RenderFrameSet final : public RenderBox {
56 WTF_MAKE_ISO_ALLOCATED(RenderFrameSet);
57public:
58 RenderFrameSet(HTMLFrameSetElement&, RenderStyle&&);
59 virtual ~RenderFrameSet();
60
61 HTMLFrameSetElement& frameSetElement() const;
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 void notifyFrameEdgeInfoChanged();
74
75private:
76 void element() const = delete;
77
78 static const int noSplit = -1;
79
80 class GridAxis {
81 WTF_MAKE_NONCOPYABLE(GridAxis);
82 public:
83 GridAxis();
84 void resize(int);
85
86 Vector<int> m_sizes;
87 Vector<int> m_deltas;
88 Vector<bool> m_preventResize;
89 Vector<bool> m_allowBorder;
90 int m_splitBeingResized;
91 int m_splitResizeOffset;
92 };
93
94 const char* renderName() const override { return "RenderFrameSet"; }
95 bool isFrameSet() const override { return true; }
96
97 void layout() override;
98 void paint(PaintInfo&, const LayoutPoint&) override;
99 bool canHaveChildren() const override { return true; }
100 bool isChildAllowed(const RenderObject&, const RenderStyle&) const override;
101 CursorDirective getCursor(const LayoutPoint&, Cursor&) const override;
102
103 bool flattenFrameSet() const;
104
105 void setIsResizing(bool);
106
107 void layOutAxis(GridAxis&, const Length*, int availableSpace);
108 void computeEdgeInfo();
109 void fillFromEdgeInfo(const FrameEdgeInfo& edgeInfo, int r, int c);
110 void positionFrames();
111 void positionFramesWithFlattening();
112
113 int splitPosition(const GridAxis&, int split) const;
114 int hitTestSplit(const GridAxis&, int position) const;
115
116 void startResizing(GridAxis&, int position);
117 void continueResizing(GridAxis&, int position);
118
119 void paintRowBorder(const PaintInfo&, const IntRect&);
120 void paintColumnBorder(const PaintInfo&, const IntRect&);
121
122 GridAxis m_rows;
123 GridAxis m_cols;
124
125 bool m_isResizing;
126 bool m_isChildResizing;
127};
128
129} // namespace WebCore
130
131SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderFrameSet, isFrameSet())
132