summaryrefslogtreecommitdiff
path: root/vcl/generic/glyphs/scrptrun.h
blob: 38302e1413d8a175bf686fb10715dd8e592b062f (plain)
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
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
/*
 *******************************************************************************
 *
 *   Copyright (c) 1995-2013 International Business Machines Corporation and others
 *
 *   All rights reserved.
 *
 *   Permission is hereby granted, free of charge, to any person obtaining a copy of
 *   this software and associated documentation files (the "Software"), to deal in
 *   the Software without restriction, including without limitation the rights to
 *   use, copy, modify, merge, publish, distribute, and/or sell copies of the
 *   Software, and to permit persons to whom the Software is furnished to do so,
 *   provided that the above copyright notice(s) and this permission notice appear
 *   in all copies of the Software and that both the above copyright notice(s) and
 *   this permission notice appear in supporting documentation.
 *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 *   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. IN
 *   NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS INCLUDED IN THIS NOTICE BE
 *   LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY
 *   DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 *   ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 *   CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 *   Except as contained in this notice, the name of a copyright holder shall not be
 *   used in advertising or otherwise to promote the sale, use or other dealings in
 *   this Software without prior written authorization of the copyright holder.
 *
 *******************************************************************************
 *   file name:  scrptrun.h
 *
 *   created on: 10/17/2001
 *   created by: Eric R. Mader
 */

#ifndef __SCRPTRUN_H
#define __SCRPTRUN_H

#include <sal/config.h>

#include <sal/types.h>
#include "unicode/utypes.h"
#include "unicode/uobject.h"
#include "unicode/uscript.h"

struct ScriptRecord
{
    UChar32 startChar;
    UChar32 endChar;
    UScriptCode scriptCode;
};

struct ParenStackEntry
{
    int32_t pairIndex;
    UScriptCode scriptCode;
};

class ScriptRun : public UObject {
public:
    ScriptRun();

    ScriptRun(const UChar chars[], int32_t length);

    ScriptRun(const UChar chars[], int32_t start, int32_t length);

    void reset();

    void reset(int32_t start, int32_t count);

    void reset(const UChar chars[], int32_t start, int32_t length);

    int32_t getScriptStart();

    int32_t getScriptEnd();

    UScriptCode getScriptCode();

    UBool next();

    /**
     * ICU "poor man's RTTI", returns a UClassID for the actual class.
     *
     * @stable ICU 2.2
     */
    virtual inline UClassID getDynamicClassID() const SAL_OVERRIDE { return getStaticClassID(); }

    /**
     * ICU "poor man's RTTI", returns a UClassID for this class.
     *
     * @stable ICU 2.2
     */
    static inline UClassID getStaticClassID() { return (UClassID)&fgClassID; }

private:

    static UBool sameScript(int32_t scriptOne, int32_t scriptTwo);

    int32_t charStart;
    int32_t charLimit;
    const UChar *charArray;

    int32_t scriptStart;
    int32_t scriptEnd;
    UScriptCode scriptCode;

    ParenStackEntry parenStack[128];
    int32_t parenSP;

    static int8_t highBit(int32_t value);
    static int32_t getPairIndex(UChar32 ch);

    static UChar32 pairedChars[];
    static const int32_t pairedCharCount;
    static const int32_t pairedCharPower;
    static const int32_t pairedCharExtra;

    /**
     * The address of this static class variable serves as this class's ID
     * for ICU "poor man's RTTI".
     */
    static const char fgClassID;
};

inline ScriptRun::ScriptRun()
{
    reset(NULL, 0, 0);
}

inline ScriptRun::ScriptRun(const UChar chars[], int32_t length)
{
    reset(chars, 0, length);
}

inline ScriptRun::ScriptRun(const UChar chars[], int32_t start, int32_t length)
{
    reset(chars, start, length);
}

inline int32_t ScriptRun::getScriptStart()
{
    return scriptStart;
}

inline int32_t ScriptRun::getScriptEnd()
{
    return scriptEnd;
}

inline UScriptCode ScriptRun::getScriptCode()
{
    return scriptCode;
}

inline void ScriptRun::reset()
{
    scriptStart = charStart;
    scriptEnd   = charStart;
    scriptCode  = USCRIPT_INVALID_CODE;
    parenSP     = -1;
}

inline void ScriptRun::reset(int32_t start, int32_t length)
{
    charStart = start;
    charLimit = start + length;

    reset();
}

inline void ScriptRun::reset(const UChar chars[], int32_t start, int32_t length)
{
    charArray = chars;

    reset(start, length);
}

#endif