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 | |
27 | namespace WebCore { |
28 | |
29 | class HTMLFrameSetElement; |
30 | class MouseEvent; |
31 | class RenderFrame; |
32 | |
33 | enum FrameEdge { LeftFrameEdge, RightFrameEdge, TopFrameEdge, BottomFrameEdge }; |
34 | |
35 | struct 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 | |
50 | private: |
51 | Vector<bool> m_preventResize; |
52 | Vector<bool> m_allowBorder; |
53 | }; |
54 | |
55 | class RenderFrameSet final : public RenderBox { |
56 | WTF_MAKE_ISO_ALLOCATED(RenderFrameSet); |
57 | public: |
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 | |
75 | private: |
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 | |
131 | SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderFrameSet, isFrameSet()) |
132 | |