Mercurial > octave-dspies
comparison libgui/qterminal/libqterminal/unix/konsole_wcwidth.cpp @ 15681:018c46ef8a0c
maint: move everything under libgui/qterminal
author | Jordi Gutiérrez Hermoso <jordigh@octave.org> |
---|---|
date | Mon, 26 Nov 2012 12:07:51 -0500 |
parents | libqterminal/unix/konsole_wcwidth.cpp@35c891dce299 |
children |
comparison
equal
deleted
inserted
replaced
15680:6b1369106141 | 15681:018c46ef8a0c |
---|---|
1 /* $XFree86: xc/programs/xterm/wcwidth.character,v 1.3 2001/07/29 22:08:16 tsi Exp $ */ | |
2 /* | |
3 * This is an implementation of wcwidth() and wcswidth() as defined in | |
4 * "The Single UNIX Specification, Version 2, The Open Group, 1997" | |
5 * <http://www.UNIX-systems.org/online.html> | |
6 * | |
7 * Markus Kuhn -- 2001-01-12 -- public domain | |
8 */ | |
9 | |
10 #include "unix/konsole_wcwidth.h" | |
11 | |
12 struct interval { | |
13 unsigned short first; | |
14 unsigned short last; | |
15 }; | |
16 | |
17 /* auxiliary function for binary search in interval table */ | |
18 static int bisearch(quint16 ucs, const struct interval *table, int max) { | |
19 int min = 0; | |
20 int mid; | |
21 | |
22 if (ucs < table[0].first || ucs > table[max].last) | |
23 return 0; | |
24 while (max >= min) { | |
25 mid = (min + max) / 2; | |
26 if (ucs > table[mid].last) | |
27 min = mid + 1; | |
28 else if (ucs < table[mid].first) | |
29 max = mid - 1; | |
30 else | |
31 return 1; | |
32 } | |
33 | |
34 return 0; | |
35 } | |
36 | |
37 | |
38 /* The following functions define the column width of an ISO 10646 | |
39 * character as follows: | |
40 * | |
41 * - The null character (U+0000) has a column width of 0. | |
42 * | |
43 * - Other C0/C1 control characters and DEL will lead to a return | |
44 * value of -1. | |
45 * | |
46 * - Non-spacing and enclosing combining characters (general | |
47 * category code Mn or Me in the Unicode database) have a | |
48 * column width of 0. | |
49 * | |
50 * - Other format characters (general category code Cf in the Unicode | |
51 * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0. | |
52 * | |
53 * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) | |
54 * have a column width of 0. | |
55 * | |
56 * - Spacing characters in the East Asian Wide (W) or East Asian | |
57 * FullWidth (F) category as defined in Unicode Technical | |
58 * Report #11 have a column width of 2. | |
59 * | |
60 * - All remaining characters (including all printable | |
61 * ISO 8859-1 and WGL4 characters, Unicode control characters, | |
62 * etc.) have a column width of 1. | |
63 * | |
64 * This implementation assumes that quint16 characters are encoded | |
65 * in ISO 10646. | |
66 */ | |
67 | |
68 int konsole_wcwidth(quint16 ucs) | |
69 { | |
70 /* sorted list of non-overlapping intervals of non-spacing characters */ | |
71 static const struct interval combining[] = { | |
72 { 0x0300, 0x034E }, { 0x0360, 0x0362 }, { 0x0483, 0x0486 }, | |
73 { 0x0488, 0x0489 }, { 0x0591, 0x05A1 }, { 0x05A3, 0x05B9 }, | |
74 { 0x05BB, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 }, | |
75 { 0x05C4, 0x05C4 }, { 0x064B, 0x0655 }, { 0x0670, 0x0670 }, | |
76 { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED }, | |
77 { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A }, | |
78 { 0x07A6, 0x07B0 }, { 0x0901, 0x0902 }, { 0x093C, 0x093C }, | |
79 { 0x0941, 0x0948 }, { 0x094D, 0x094D }, { 0x0951, 0x0954 }, | |
80 { 0x0962, 0x0963 }, { 0x0981, 0x0981 }, { 0x09BC, 0x09BC }, | |
81 { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD }, { 0x09E2, 0x09E3 }, | |
82 { 0x0A02, 0x0A02 }, { 0x0A3C, 0x0A3C }, { 0x0A41, 0x0A42 }, | |
83 { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D }, { 0x0A70, 0x0A71 }, | |
84 { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC }, { 0x0AC1, 0x0AC5 }, | |
85 { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD }, { 0x0B01, 0x0B01 }, | |
86 { 0x0B3C, 0x0B3C }, { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, | |
87 { 0x0B4D, 0x0B4D }, { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, | |
88 { 0x0BC0, 0x0BC0 }, { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, | |
89 { 0x0C46, 0x0C48 }, { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, | |
90 { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD }, | |
91 { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D }, { 0x0DCA, 0x0DCA }, | |
92 { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 }, { 0x0E31, 0x0E31 }, | |
93 { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E }, { 0x0EB1, 0x0EB1 }, | |
94 { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC }, { 0x0EC8, 0x0ECD }, | |
95 { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 }, { 0x0F37, 0x0F37 }, | |
96 { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E }, { 0x0F80, 0x0F84 }, | |
97 { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 }, { 0x0F99, 0x0FBC }, | |
98 { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 }, { 0x1032, 0x1032 }, | |
99 { 0x1036, 0x1037 }, { 0x1039, 0x1039 }, { 0x1058, 0x1059 }, | |
100 { 0x1160, 0x11FF }, { 0x17B7, 0x17BD }, { 0x17C6, 0x17C6 }, | |
101 { 0x17C9, 0x17D3 }, { 0x180B, 0x180E }, { 0x18A9, 0x18A9 }, | |
102 { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x206A, 0x206F }, | |
103 { 0x20D0, 0x20E3 }, { 0x302A, 0x302F }, { 0x3099, 0x309A }, | |
104 { 0xFB1E, 0xFB1E }, { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, | |
105 { 0xFFF9, 0xFFFB } | |
106 }; | |
107 | |
108 /* test for 8-bit control characters */ | |
109 if (ucs == 0) | |
110 return 0; | |
111 if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) | |
112 return -1; | |
113 | |
114 /* binary search in table of non-spacing characters */ | |
115 if (bisearch(ucs, combining, | |
116 sizeof(combining) / sizeof(struct interval) - 1)) | |
117 return 0; | |
118 | |
119 /* if we arrive here, ucs is not a combining or C0/C1 control character */ | |
120 | |
121 return 1 + | |
122 (ucs >= 0x1100 && | |
123 (ucs <= 0x115f || /* Hangul Jamo init. consonants */ | |
124 (ucs >= 0x2e80 && ucs <= 0xa4cf && (ucs & ~0x0011) != 0x300a && | |
125 ucs != 0x303f) || /* CJK ... Yi */ | |
126 (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */ | |
127 (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */ | |
128 (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */ | |
129 (ucs >= 0xff00 && ucs <= 0xff5f) || /* Fullwidth Forms */ | |
130 (ucs >= 0xffe0 && ucs <= 0xffe6) /* do not compare UINT16 with 0x20000 || | |
131 (ucs >= 0x20000 && ucs <= 0x2ffff) */)); | |
132 } | |
133 | |
134 #if 0 | |
135 /* | |
136 * The following function is the same as konsole_wcwidth(), except that | |
137 * spacing characters in the East Asian Ambiguous (A) category as | |
138 * defined in Unicode Technical Report #11 have a column width of 2. | |
139 * This experimental variant might be useful for users of CJK legacy | |
140 * encodings who want to migrate to UCS. It is not otherwise | |
141 * recommended for general use. | |
142 */ | |
143 int konsole_wcwidth_cjk(quint16 ucs) | |
144 { | |
145 /* sorted list of non-overlapping intervals of East Asian Ambiguous | |
146 * characters */ | |
147 static const struct interval ambiguous[] = { | |
148 { 0x00A1, 0x00A1 }, { 0x00A4, 0x00A4 }, { 0x00A7, 0x00A8 }, | |
149 { 0x00AA, 0x00AA }, { 0x00AD, 0x00AD }, { 0x00B0, 0x00B4 }, | |
150 { 0x00B6, 0x00BA }, { 0x00BC, 0x00BF }, { 0x00C6, 0x00C6 }, | |
151 { 0x00D0, 0x00D0 }, { 0x00D7, 0x00D8 }, { 0x00DE, 0x00E1 }, | |
152 { 0x00E6, 0x00E6 }, { 0x00E8, 0x00EA }, { 0x00EC, 0x00ED }, | |
153 { 0x00F0, 0x00F0 }, { 0x00F2, 0x00F3 }, { 0x00F7, 0x00FA }, | |
154 { 0x00FC, 0x00FC }, { 0x00FE, 0x00FE }, { 0x0101, 0x0101 }, | |
155 { 0x0111, 0x0111 }, { 0x0113, 0x0113 }, { 0x011B, 0x011B }, | |
156 { 0x0126, 0x0127 }, { 0x012B, 0x012B }, { 0x0131, 0x0133 }, | |
157 { 0x0138, 0x0138 }, { 0x013F, 0x0142 }, { 0x0144, 0x0144 }, | |
158 { 0x0148, 0x014A }, { 0x014D, 0x014D }, { 0x0152, 0x0153 }, | |
159 { 0x0166, 0x0167 }, { 0x016B, 0x016B }, { 0x01CE, 0x01CE }, | |
160 { 0x01D0, 0x01D0 }, { 0x01D2, 0x01D2 }, { 0x01D4, 0x01D4 }, | |
161 { 0x01D6, 0x01D6 }, { 0x01D8, 0x01D8 }, { 0x01DA, 0x01DA }, | |
162 { 0x01DC, 0x01DC }, { 0x0251, 0x0251 }, { 0x0261, 0x0261 }, | |
163 { 0x02C7, 0x02C7 }, { 0x02C9, 0x02CB }, { 0x02CD, 0x02CD }, | |
164 { 0x02D0, 0x02D0 }, { 0x02D8, 0x02DB }, { 0x02DD, 0x02DD }, | |
165 { 0x0391, 0x03A1 }, { 0x03A3, 0x03A9 }, { 0x03B1, 0x03C1 }, | |
166 { 0x03C3, 0x03C9 }, { 0x0401, 0x0401 }, { 0x0410, 0x044F }, | |
167 { 0x0451, 0x0451 }, { 0x2010, 0x2010 }, { 0x2013, 0x2016 }, | |
168 { 0x2018, 0x2019 }, { 0x201C, 0x201D }, { 0x2020, 0x2021 }, | |
169 { 0x2025, 0x2027 }, { 0x2030, 0x2030 }, { 0x2032, 0x2033 }, | |
170 { 0x2035, 0x2035 }, { 0x203B, 0x203B }, { 0x2074, 0x2074 }, | |
171 { 0x207F, 0x207F }, { 0x2081, 0x2084 }, { 0x20AC, 0x20AC }, | |
172 { 0x2103, 0x2103 }, { 0x2105, 0x2105 }, { 0x2109, 0x2109 }, | |
173 { 0x2113, 0x2113 }, { 0x2121, 0x2122 }, { 0x2126, 0x2126 }, | |
174 { 0x212B, 0x212B }, { 0x2154, 0x2155 }, { 0x215B, 0x215B }, | |
175 { 0x215E, 0x215E }, { 0x2160, 0x216B }, { 0x2170, 0x2179 }, | |
176 { 0x2190, 0x2199 }, { 0x21D2, 0x21D2 }, { 0x21D4, 0x21D4 }, | |
177 { 0x2200, 0x2200 }, { 0x2202, 0x2203 }, { 0x2207, 0x2208 }, | |
178 { 0x220B, 0x220B }, { 0x220F, 0x220F }, { 0x2211, 0x2211 }, | |
179 { 0x2215, 0x2215 }, { 0x221A, 0x221A }, { 0x221D, 0x2220 }, | |
180 { 0x2223, 0x2223 }, { 0x2225, 0x2225 }, { 0x2227, 0x222C }, | |
181 { 0x222E, 0x222E }, { 0x2234, 0x2237 }, { 0x223C, 0x223D }, | |
182 { 0x2248, 0x2248 }, { 0x224C, 0x224C }, { 0x2252, 0x2252 }, | |
183 { 0x2260, 0x2261 }, { 0x2264, 0x2267 }, { 0x226A, 0x226B }, | |
184 { 0x226E, 0x226F }, { 0x2282, 0x2283 }, { 0x2286, 0x2287 }, | |
185 { 0x2295, 0x2295 }, { 0x2299, 0x2299 }, { 0x22A5, 0x22A5 }, | |
186 { 0x22BF, 0x22BF }, { 0x2312, 0x2312 }, { 0x2460, 0x24BF }, | |
187 { 0x24D0, 0x24E9 }, { 0x2500, 0x254B }, { 0x2550, 0x2574 }, | |
188 { 0x2580, 0x258F }, { 0x2592, 0x2595 }, { 0x25A0, 0x25A1 }, | |
189 { 0x25A3, 0x25A9 }, { 0x25B2, 0x25B3 }, { 0x25B6, 0x25B7 }, | |
190 { 0x25BC, 0x25BD }, { 0x25C0, 0x25C1 }, { 0x25C6, 0x25C8 }, | |
191 { 0x25CB, 0x25CB }, { 0x25CE, 0x25D1 }, { 0x25E2, 0x25E5 }, | |
192 { 0x25EF, 0x25EF }, { 0x2605, 0x2606 }, { 0x2609, 0x2609 }, | |
193 { 0x260E, 0x260F }, { 0x261C, 0x261C }, { 0x261E, 0x261E }, | |
194 { 0x2640, 0x2640 }, { 0x2642, 0x2642 }, { 0x2660, 0x2661 }, | |
195 { 0x2663, 0x2665 }, { 0x2667, 0x266A }, { 0x266C, 0x266D }, | |
196 { 0x266F, 0x266F }, { 0x300A, 0x300B }, { 0x301A, 0x301B }, | |
197 { 0xE000, 0xF8FF }, { 0xFFFD, 0xFFFD } | |
198 }; | |
199 | |
200 /* binary search in table of non-spacing characters */ | |
201 if (bisearch(ucs, ambiguous, | |
202 sizeof(ambiguous) / sizeof(struct interval) - 1)) | |
203 return 2; | |
204 | |
205 return konsole_wcwidth(ucs); | |
206 } | |
207 #endif | |
208 | |
209 // single byte char: +1, multi byte char: +2 | |
210 int string_width( const QString &txt ) | |
211 { | |
212 int w = 0; | |
213 for ( int i = 0; i < txt.length(); ++i ) | |
214 w += konsole_wcwidth( txt[ i ].unicode() ); | |
215 return w; | |
216 } |