1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
|
/*
* Copyright (C) 2004 Apple Computer, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE COMPUTER, INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef VisibleSelection_h
#define VisibleSelection_h
#include "TextGranularity.h"
#include "VisiblePosition.h"
namespace WebCore {
class Position;
const EAffinity SEL_DEFAULT_AFFINITY = DOWNSTREAM;
enum SelectionDirection { DirectionForward, DirectionBackward, DirectionRight, DirectionLeft };
class VisibleSelection {
public:
enum SelectionType { NoSelection, CaretSelection, RangeSelection };
VisibleSelection();
VisibleSelection(const Position&, EAffinity);
VisibleSelection(const Position&, const Position&, EAffinity = SEL_DEFAULT_AFFINITY);
VisibleSelection(const Range*, EAffinity = SEL_DEFAULT_AFFINITY);
VisibleSelection(const VisiblePosition&);
VisibleSelection(const VisiblePosition&, const VisiblePosition&);
static VisibleSelection selectionFromContentsOfNode(Node*);
SelectionType selectionType() const { return m_selectionType; }
void setAffinity(EAffinity affinity) { m_affinity = affinity; }
EAffinity affinity() const { return m_affinity; }
void setBase(const Position&);
void setBase(const VisiblePosition&);
void setExtent(const Position&);
void setExtent(const VisiblePosition&);
Position base() const { return m_base; }
Position extent() const { return m_extent; }
Position start() const { return m_start; }
Position end() const { return m_end; }
VisiblePosition visibleStart() const { return VisiblePosition(m_start, isRange() ? DOWNSTREAM : affinity()); }
VisiblePosition visibleEnd() const { return VisiblePosition(m_end, isRange() ? UPSTREAM : affinity()); }
bool isNone() const { return selectionType() == NoSelection; }
bool isCaret() const { return selectionType() == CaretSelection; }
bool isRange() const { return selectionType() == RangeSelection; }
bool isCaretOrRange() const { return selectionType() != NoSelection; }
bool isNonOrphanedRange() const { return isRange() && !start().isOrphan() && !end().isOrphan(); }
bool isNonOrphanedCaretOrRange() const { return isCaretOrRange() && !start().isOrphan() && !end().isOrphan(); }
bool isBaseFirst() const { return m_baseIsFirst; }
bool isAll(EditingBoundaryCrossingRule) const;
void appendTrailingWhitespace();
bool expandUsingGranularity(TextGranularity granularity);
// We don't yet support multi-range selections, so we only ever have one range to return.
PassRefPtr<Range> firstRange() const;
// FIXME: Most callers probably don't want this function, but are using it
// for historical reasons. toNormalizedRange contracts the range around
// text, and moves the caret upstream before returning the range.
PassRefPtr<Range> toNormalizedRange() const;
Element* rootEditableElement() const;
bool isContentEditable() const;
bool isContentRichlyEditable() const;
Node* shadowTreeRootNode() const;
#ifndef NDEBUG
void debugPosition() const;
void formatForDebugger(char* buffer, unsigned length) const;
void showTreeForThis() const;
#endif
void setWithoutValidation(const Position&, const Position&);
private:
void validate(TextGranularity = CharacterGranularity);
// Support methods for validate()
void setBaseAndExtentToDeepEquivalents();
void setStartAndEndFromBaseAndExtentRespectingGranularity(TextGranularity);
void adjustSelectionToAvoidCrossingEditingBoundaries();
void updateSelectionType();
// We need to store these as Positions because VisibleSelection is
// used to store values in editing commands for use when
// undoing the command. We need to be able to create a selection that, while currently
// invalid, will be valid once the changes are undone.
Position m_base; // Where the first click happened
Position m_extent; // Where the end click happened
Position m_start; // Leftmost position when expanded to respect granularity
Position m_end; // Rightmost position when expanded to respect granularity
EAffinity m_affinity; // the upstream/downstream affinity of the caret
// these are cached, can be recalculated by validate()
SelectionType m_selectionType; // None, Caret, Range
bool m_baseIsFirst; // true if base is before the extent
};
inline bool operator==(const VisibleSelection& a, const VisibleSelection& b)
{
return a.start() == b.start() && a.end() == b.end() && a.affinity() == b.affinity() && a.isBaseFirst() == b.isBaseFirst();
}
inline bool operator!=(const VisibleSelection& a, const VisibleSelection& b)
{
return !(a == b);
}
} // namespace WebCore
#ifndef NDEBUG
// Outside the WebCore namespace for ease of invocation from gdb.
void showTree(const WebCore::VisibleSelection&);
void showTree(const WebCore::VisibleSelection*);
#endif
#endif // VisibleSelection_h
|
