1 /*
2  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
3  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
4  *           (C) 2000 Dirk Mueller (mueller@kde.org)
5  *           (C) 2004 Allan Sandfeld Jensen (kde@carewolf.com)
6  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
7  *
8  * This library is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Library General Public
10  * License as published by the Free Software Foundation; either
11  * version 2 of the License, or (at your option) any later version.
12  *
13  * This library is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * Library General Public License for more details.
17  *
18  * You should have received a copy of the GNU Library General Public License
19  * along with this library; see the file COPYING.LIB.  If not, write to
20  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
21  * Boston, MA 02110-1301, USA.
22  *
23  */
24 
25 #ifndef RenderSelectionInfo_h
26 #define RenderSelectionInfo_h
27 
28 #include "IntRect.h"
29 #include "RenderBox.h"
30 
31 namespace WebCore {
32 
33 class RenderSelectionInfoBase {
34     WTF_MAKE_NONCOPYABLE(RenderSelectionInfoBase); WTF_MAKE_FAST_ALLOCATED;
35 public:
RenderSelectionInfoBase()36     RenderSelectionInfoBase()
37         : m_object(0)
38         , m_repaintContainer(0)
39         , m_state(RenderObject::SelectionNone)
40     {
41     }
42 
RenderSelectionInfoBase(RenderObject * o)43     RenderSelectionInfoBase(RenderObject* o)
44         : m_object(o)
45         , m_repaintContainer(o->containerForRepaint())
46         , m_state(o->selectionState())
47     {
48     }
49 
object()50     RenderObject* object() const { return m_object; }
repaintContainer()51     RenderBoxModelObject* repaintContainer() const { return m_repaintContainer; }
state()52     RenderObject::SelectionState state() const { return m_state; }
53 
54 protected:
55     RenderObject* m_object;
56     RenderBoxModelObject* m_repaintContainer;
57     RenderObject::SelectionState m_state;
58 };
59 
60 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderObject.
61 class RenderSelectionInfo : public RenderSelectionInfoBase {
62 public:
RenderSelectionInfo(RenderObject * o,bool clipToVisibleContent)63     RenderSelectionInfo(RenderObject* o, bool clipToVisibleContent)
64         : RenderSelectionInfoBase(o)
65         , m_rect(o->needsLayout() ? IntRect() : o->selectionRectForRepaint(m_repaintContainer, clipToVisibleContent))
66     {
67     }
68 
repaint()69     void repaint()
70     {
71         m_object->repaintUsingContainer(m_repaintContainer, m_rect);
72     }
73 
rect()74     IntRect rect() const { return m_rect; }
75 
76 private:
77     IntRect m_rect; // relative to repaint container
78 };
79 
80 
81 // This struct is used when the selection changes to cache the old and new state of the selection for each RenderBlock.
82 class RenderBlockSelectionInfo : public RenderSelectionInfoBase {
83 public:
RenderBlockSelectionInfo(RenderBlock * b)84     RenderBlockSelectionInfo(RenderBlock* b)
85         : RenderSelectionInfoBase(b)
86         , m_rects(b->needsLayout() ? GapRects() : block()->selectionGapRectsForRepaint(m_repaintContainer))
87     {
88     }
89 
repaint()90     void repaint()
91     {
92         m_object->repaintUsingContainer(m_repaintContainer, m_rects);
93     }
94 
block()95     RenderBlock* block() const { return toRenderBlock(m_object); }
rects()96     GapRects rects() const { return m_rects; }
97 
98 private:
99     GapRects m_rects; // relative to repaint container
100 };
101 
102 } // namespace WebCore
103 
104 
105 #endif // RenderSelectionInfo_h
106