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39
40#ifndef QTEXTBOUNDARYFINDER_H
41#define QTEXTBOUNDARYFINDER_H
42
43#include <QtCore/qchar.h>
44#include <QtCore/qstring.h>
45
46QT_BEGIN_NAMESPACE
47
48
49struct QCharAttributes;
50
51class Q_CORE_EXPORT QTextBoundaryFinder
52{
53public:
54 QTextBoundaryFinder();
55 QTextBoundaryFinder(const QTextBoundaryFinder &other);
56 QTextBoundaryFinder &operator=(const QTextBoundaryFinder &other);
57 ~QTextBoundaryFinder();
58
59 enum BoundaryType {
60 Grapheme,
61 Word,
62 Sentence,
63 Line
64 };
65
66 enum BoundaryReason {
67 NotAtBoundary = 0,
68 BreakOpportunity = 0x1f,
69 StartOfItem = 0x20,
70 EndOfItem = 0x40,
71 MandatoryBreak = 0x80,
72 SoftHyphen = 0x100
73 };
74 Q_DECLARE_FLAGS( BoundaryReasons, BoundaryReason )
75
76 QTextBoundaryFinder(BoundaryType type, const QString &string);
77 QTextBoundaryFinder(BoundaryType type, const QChar *chars, qsizetype length, unsigned char *buffer = nullptr, qsizetype bufferSize = 0)
78 : QTextBoundaryFinder(type, QStringView(chars, length), buffer, bufferSize)
79 {}
80 QTextBoundaryFinder(BoundaryType type, QStringView str, unsigned char *buffer = nullptr, qsizetype bufferSize = 0);
81
82 inline bool isValid() const { return attributes; }
83
84 inline BoundaryType type() const { return t; }
85 QString string() const;
86
87 void toStart();
88 void toEnd();
89 qsizetype position() const;
90 void setPosition(qsizetype position);
91
92 qsizetype toNextBoundary();
93 qsizetype toPreviousBoundary();
94
95 bool isAtBoundary() const;
96 BoundaryReasons boundaryReasons() const;
97
98private:
99 BoundaryType t = Grapheme;
100 QString s;
101 QStringView sv;
102 qsizetype pos;
103 uint freeBuffer : 1;
104 uint unused : 31;
105 QCharAttributes *attributes = nullptr;
106};
107
108Q_DECLARE_OPERATORS_FOR_FLAGS(QTextBoundaryFinder::BoundaryReasons)
109
110QT_END_NAMESPACE
111
112#endif
113
114