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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/wcwidth.patch | 254 |
1 files changed, 254 insertions, 0 deletions
diff --git a/doc/wcwidth.patch b/doc/wcwidth.patch new file mode 100644 index 0000000..a1ed886 --- /dev/null +++ b/doc/wcwidth.patch @@ -0,0 +1,254 @@ +diff --git a/src/Makefile.in b/src/Makefile.in +index defe61d..cbbacd1 100644 +--- a/src/Makefile.in ++++ b/src/Makefile.in +@@ -35,7 +35,7 @@ COMMON = \ + screen.o scrollbar.o scrollbar-next.o scrollbar-rxvt.o \ + scrollbar-xterm.o scrollbar-plain.o xdefaults.o encoding.o \ + rxvttoolkit.o rxvtutil.o keyboard.o rxvtimg.o \ +- ev_cpp.o fdpass_wrapper.o ptytty_wrapper.o @PERL_O@ ++ ev_cpp.o fdpass_wrapper.o ptytty_wrapper.o wcwidth.o @PERL_O@ + + COMMON_DAEMON = rxvtdaemon.o + +diff --git a/src/rxvt.h b/src/rxvt.h +index 5be4391..152bf64 100644 +--- a/src/rxvt.h ++++ b/src/rxvt.h +@@ -706,6 +706,12 @@ typedef struct _mwmhints + // speed hack, copy some member variable into a local variable of the same name + #define dLocal(type,name) type const name = this->name + ++int mk_wcwidth(wchar_t c); ++int mk_wcswidth(const wchar_t *s, size_t n); ++ ++#define wcwidth mk_wcwidth ++#define wcswidth mk_wcswidth ++ + // for speed reasons, we assume that all codepoints 32 to 126 are + // single-width. + #define WCWIDTH(c) (IN_RANGE_INC (c, 0x20, 0x7e) ? 1 : wcwidth (c)) +diff --git a/src/wcwidth.C b/src/wcwidth.C +new file mode 100644 +index 0000000..c3d90a6 +--- /dev/null ++++ b/src/wcwidth.C +@@ -0,0 +1,218 @@ ++/* ++ * This is an implementation of wcwidth() and wcswidth() (defined in ++ * IEEE Std 1002.1-2001) for Unicode. ++ * ++ * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html ++ * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html ++ * ++ * In fixed-width output devices, Latin characters all occupy a single ++ * "cell" position of equal width, whereas ideographic CJK characters ++ * occupy two such cells. Interoperability between terminal-line ++ * applications and (teletype-style) character terminals using the ++ * UTF-8 encoding requires agreement on which character should advance ++ * the cursor by how many cell positions. No established formal ++ * standards exist at present on which Unicode character shall occupy ++ * how many cell positions on character terminals. These routines are ++ * a first attempt of defining such behavior based on simple rules ++ * applied to data provided by the Unicode Consortium. ++ * ++ * For some graphical characters, the Unicode standard explicitly ++ * defines a character-cell width via the definition of the East Asian ++ * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes. ++ * In all these cases, there is no ambiguity about which width a ++ * terminal shall use. For characters in the East Asian Ambiguous (A) ++ * class, the width choice depends purely on a preference of backward ++ * compatibility with either historic CJK or Western practice. ++ * Choosing single-width for these characters is easy to justify as ++ * the appropriate long-term solution, as the CJK practice of ++ * displaying these characters as double-width comes from historic ++ * implementation simplicity (8-bit encoded characters were displayed ++ * single-width and 16-bit ones double-width, even for Greek, ++ * Cyrillic, etc.) and not any typographic considerations. ++ * ++ * Much less clear is the choice of width for the Not East Asian ++ * (Neutral) class. Existing practice does not dictate a width for any ++ * of these characters. It would nevertheless make sense ++ * typographically to allocate two character cells to characters such ++ * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be ++ * represented adequately with a single-width glyph. The following ++ * routines at present merely assign a single-cell width to all ++ * neutral characters, in the interest of simplicity. This is not ++ * entirely satisfactory and should be reconsidered before ++ * establishing a formal standard in this area. At the moment, the ++ * decision which Not East Asian (Neutral) characters should be ++ * represented by double-width glyphs cannot yet be answered by ++ * applying a simple rule from the Unicode database content. Setting ++ * up a proper standard for the behavior of UTF-8 character terminals ++ * will require a careful analysis not only of each Unicode character, ++ * but also of each presentation form, something the author of these ++ * routines has avoided to do so far. ++ * ++ * http://www.unicode.org/unicode/reports/tr11/ ++ * ++ * Markus Kuhn -- 2007-05-26 (Unicode 5.0) ++ * ++ * Permission to use, copy, modify, and distribute this software ++ * for any purpose and without fee is hereby granted. The author ++ * disclaims all warranties with regard to this software. ++ * ++ * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c ++ */ ++ ++#include <wchar.h> ++ ++struct interval { ++ int first; ++ int last; ++}; ++ ++/* auxiliary function for binary search in interval table */ ++static int bisearch(wchar_t ucs, const struct interval *table, int max) { ++ int min = 0; ++ int mid; ++ ++ if (ucs < table[0].first || ucs > table[max].last) ++ return 0; ++ while (max >= min) { ++ mid = (min + max) / 2; ++ if (ucs > table[mid].last) ++ min = mid + 1; ++ else if (ucs < table[mid].first) ++ max = mid - 1; ++ else ++ return 1; ++ } ++ ++ return 0; ++} ++ ++ ++/* The following two functions define the column width of an ISO 10646 ++ * character as follows: ++ * ++ * - The null character (U+0000) has a column width of 0. ++ * ++ * - Other C0/C1 control characters and DEL will lead to a return ++ * value of -1. ++ * ++ * - Non-spacing and enclosing combining characters (general ++ * category code Mn or Me in the Unicode database) have a ++ * column width of 0. ++ * ++ * - SOFT HYPHEN (U+00AD) has a column width of 1. ++ * ++ * - Other format characters (general category code Cf in the Unicode ++ * database) and ZERO WIDTH SPACE (U+200B) have a column width of 0. ++ * ++ * - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF) ++ * have a column width of 0. ++ * ++ * - Spacing characters in the East Asian Wide (W) or East Asian ++ * Full-width (F) category as defined in Unicode Technical ++ * Report #11 have a column width of 2. ++ * ++ * - All remaining characters (including all printable ++ * ISO 8859-1 and WGL4 characters, Unicode control characters, ++ * etc.) have a column width of 1. ++ * ++ * This implementation assumes that wchar_t characters are encoded ++ * in ISO 10646. ++ */ ++ ++int mk_wcwidth(wchar_t ucs) ++{ ++ /* sorted list of non-overlapping intervals of non-spacing characters */ ++ /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */ ++ static const struct interval combining[] = { ++ { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 }, ++ { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 }, ++ { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 }, ++ { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 }, ++ { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED }, ++ { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A }, ++ { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 }, ++ { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D }, ++ { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 }, ++ { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD }, ++ { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C }, ++ { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D }, ++ { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC }, ++ { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD }, ++ { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C }, ++ { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D }, ++ { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 }, ++ { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 }, ++ { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC }, ++ { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD }, ++ { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D }, ++ { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 }, ++ { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E }, ++ { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC }, ++ { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 }, ++ { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E }, ++ { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 }, ++ { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 }, ++ { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 }, ++ { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F }, ++ { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 }, ++ { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD }, ++ { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD }, ++ { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 }, ++ { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B }, ++ { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 }, ++ { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 }, ++ { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF }, ++ { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 }, ++ { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F }, ++ { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B }, ++ { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F }, ++ { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB }, ++ { 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F }, ++ { 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 }, ++ { 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD }, ++ { 0x1D242, 0x1D244 }, { 0xE0001, 0xE0001 }, { 0xE0020, 0xE007F }, ++ { 0xE0100, 0xE01EF } ++ }; ++ ++ /* test for 8-bit control characters */ ++ if (ucs == 0) ++ return 0; ++ if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) ++ return -1; ++ ++ /* binary search in table of non-spacing characters */ ++ if (bisearch(ucs, combining, ++ sizeof(combining) / sizeof(struct interval) - 1)) ++ return 0; ++ ++ /* if we arrive here, ucs is not a combining or C0/C1 control character */ ++ ++ return 1 + ++ (ucs >= 0x1100 && ++ (ucs <= 0x115f || /* Hangul Jamo init. consonants */ ++ ucs == 0x2329 || ucs == 0x232a || ++ (ucs >= 0x2e80 && ucs <= 0xa4cf && ++ ucs != 0x303f) || /* CJK ... Yi */ ++ (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */ ++ (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */ ++ (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */ ++ (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */ ++ (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */ ++ (ucs >= 0xffe0 && ucs <= 0xffe6) || ++ (ucs >= 0x20000 && ucs <= 0x2fffd) || ++ (ucs >= 0x30000 && ucs <= 0x3fffd))); ++} ++ ++ ++int mk_wcswidth(const wchar_t *pwcs, size_t n) ++{ ++ int w, width = 0; ++ ++ for (;*pwcs && n-- > 0; pwcs++) ++ if ((w = mk_wcwidth(*pwcs)) < 0) ++ return -1; ++ else ++ width += w; ++ ++ return width; ++} |