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Replace utf8_width with Markus Kuhn's wcwidth.
git-svn-id: http://svn.irssi.org/repos/irssi/trunk@4518 dbcabf3a-b0e7-0310-adc4-f8d773084564
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@ -26,6 +26,7 @@ libfe_common_core_a_SOURCES = \
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fe-server.c \
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fe-settings.c \
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utf8.c \
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wcwidth.c \
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formats.c \
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hilight-text.c \
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keyboard.c \
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@ -306,7 +306,7 @@ static int advance (char const **str, gboolean utf8)
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c = g_utf8_get_char(*str);
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*str = g_utf8_next_char(*str);
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return utf8_width(c);
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return mk_wcwidth(c);
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} else {
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*str += 1;
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@ -7,10 +7,6 @@
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* Copyright (C) 1999 Tom Tromey
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* Copyright (C) 2000 Red Hat, Inc.
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*
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* UTF-8 width tables based on locale data from GNU libc by
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*
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* Copyright (C) 1991-2002 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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@ -198,73 +194,3 @@ void utf16_to_utf8_with_pos(const unichar *str, int spos, char *out, int *opos)
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}
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*out = '\0';
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}
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static const unichar wcc[] = {
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0x0, 0x300, 0x34F, 0x360, 0x363, 0x483, 0x487, 0x488, 0x48A, 0x591,
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0x5A2, 0x5A3, 0x5BA, 0x5BB, 0x5BE, 0x5BF, 0x5C0, 0x5C1, 0x5C3, 0x5C4,
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0x5C5, 0x64B, 0x656, 0x670, 0x671, 0x6D6, 0x6E5, 0x6E7, 0x6E9, 0x6EA,
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0x6EE, 0x70F, 0x710, 0x711, 0x712, 0x730, 0x74B, 0x7A6, 0x7B1, 0x901,
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0x903, 0x93C, 0x93D, 0x941, 0x949, 0x94D, 0x94E, 0x951, 0x955, 0x962,
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0x964, 0x981, 0x982, 0x9BC, 0x9BD, 0x9C1, 0x9C5, 0x9CD, 0x9CE, 0x9E2,
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0x9E4, 0xA02, 0xA03, 0xA3C, 0xA3D, 0xA41, 0xA43, 0xA47, 0xA49, 0xA4B,
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0xA4E, 0xA70, 0xA72, 0xA81, 0xA83, 0xABC, 0xABD, 0xAC1, 0xAC6, 0xAC7,
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0xAC9, 0xACD, 0xACE, 0xB01, 0xB02, 0xB3C, 0xB3D, 0xB3F, 0xB40, 0xB41,
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0xB44, 0xB4D, 0xB4E, 0xB56, 0xB57, 0xB82, 0xB83, 0xBC0, 0xBC1, 0xBCD,
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0xBCE, 0xC3E, 0xC41, 0xC46, 0xC49, 0xC4A, 0xC4E, 0xC55, 0xC57, 0xCBF,
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0xCC0, 0xCC6, 0xCC7, 0xCCC, 0xCCE, 0xD41, 0xD44, 0xD4D, 0xD4E, 0xDCA,
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0xDCB, 0xDD2, 0xDD5, 0xDD6, 0xDD7, 0xE31, 0xE32, 0xE34, 0xE3B, 0xE47,
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0xE4F, 0xEB1, 0xEB2, 0xEB4, 0xEBA, 0xEBB, 0xEBD, 0xEC8, 0xECE, 0xF18,
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0xF1A, 0xF35, 0xF36, 0xF37, 0xF38, 0xF39, 0xF3A, 0xF71, 0xF7F, 0xF80,
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0xF85, 0xF86, 0xF88, 0xF90, 0xF98, 0xF99, 0xFBD, 0xFC6, 0xFC7, 0x102D,
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0x1031, 0x1032, 0x1033, 0x1036, 0x1038, 0x1039, 0x103A, 0x1058, 0x105A,
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0x1100, 0x1160, 0x17B7, 0x17BE, 0x17C6, 0x17C7, 0x17C9, 0x17D4, 0x180B,
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0x180F, 0x18A9, 0x18AA, 0x200B, 0x2010, 0x202A, 0x202F, 0x206A, 0x2070,
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0x20D0, 0x20E4, 0x2E80, 0x3008, 0x300C, 0x3014, 0x3016, 0x3018, 0x301C,
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0x302A, 0x3030, 0x303F, 0x3041, 0x3095, 0x3099, 0x309B, 0xA4C7, 0xAC00,
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0xD7A4, 0xF8F0, 0xF900, 0xFA2E, 0xFB1E, 0xFB1F, 0xFE20, 0xFE24, 0xFE30,
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0xFE6C, 0xFEFF, 0xFF00, 0xFF01, 0xFF5F, 0xFFE0, 0xFFE7, 0xFFF9, 0xFFFC,
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#if 1
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0x1D167, 0x1D16A, 0x1D173, 0x1D183, 0x1D185, 0x1D18C, 0x1D1AA, 0x1D1AE,
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0x20000, 0x2A6D7, 0x2F800, 0x2FA1E, 0xE0001, 0xE0002, 0xE0020, 0xE0080
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#endif
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};
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static const int wccnum = sizeof(wcc) / sizeof(wcc[0]) - 1;
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static const char wws[] = {
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1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
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1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
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1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
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1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
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1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
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1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
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1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0,
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1, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 2,
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1, 2, 1, 2, 0, 2, 1, 2, 1, 0, 2, 1, 2, 1, 0, 2, 1, 0, 1, 0, 1, 2, 1, 0,
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1, 2, 1, 2, 1, 0, 1, 0, 1, 0, 1, 0, 1, 0, 1, 2, 1, 2, 1, 0, 1, 0, 1, -1
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};
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int utf8_width(unichar c)
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{
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int p, q, r;
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unichar d;
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if (c < wcc[1])
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return 1;
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p = 0;
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q = wccnum;
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while (p < q - 1) {
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r = (p + q)/2;
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d = wcc[r];
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if (d < c)
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p = r;
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else if (d > c)
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q = r;
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else
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return wws[r];
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}
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return wws[p];
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}
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@ -30,6 +30,6 @@ void utf16_to_utf8_with_pos(const unichar *str, int spos, char *out, int *opos);
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#define is_big5(hi,lo) (is_big5_hi(hi) && is_big5_lo(lo))
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/* Returns width for character (0-2). */
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int utf8_width(unichar c);
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int mk_wcwidth(unichar c);
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#endif
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220
src/fe-common/core/wcwidth.c
Normal file
220
src/fe-common/core/wcwidth.c
Normal file
@ -0,0 +1,220 @@
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/*
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* This is an implementation of wcwidth() and wcswidth() (defined in
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* IEEE Std 1002.1-2001) for Unicode.
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*
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* http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
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* http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
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*
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* In fixed-width output devices, Latin characters all occupy a single
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* "cell" position of equal width, whereas ideographic CJK characters
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* occupy two such cells. Interoperability between terminal-line
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* applications and (teletype-style) character terminals using the
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* UTF-8 encoding requires agreement on which character should advance
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* the cursor by how many cell positions. No established formal
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* standards exist at present on which Unicode character shall occupy
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* how many cell positions on character terminals. These routines are
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* a first attempt of defining such behavior based on simple rules
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* applied to data provided by the Unicode Consortium.
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*
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* For some graphical characters, the Unicode standard explicitly
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* defines a character-cell width via the definition of the East Asian
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* FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
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* In all these cases, there is no ambiguity about which width a
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* terminal shall use. For characters in the East Asian Ambiguous (A)
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* class, the width choice depends purely on a preference of backward
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* compatibility with either historic CJK or Western practice.
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* Choosing single-width for these characters is easy to justify as
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* the appropriate long-term solution, as the CJK practice of
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* displaying these characters as double-width comes from historic
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* implementation simplicity (8-bit encoded characters were displayed
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* single-width and 16-bit ones double-width, even for Greek,
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* Cyrillic, etc.) and not any typographic considerations.
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*
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* Much less clear is the choice of width for the Not East Asian
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* (Neutral) class. Existing practice does not dictate a width for any
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* of these characters. It would nevertheless make sense
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* typographically to allocate two character cells to characters such
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* as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
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* represented adequately with a single-width glyph. The following
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* routines at present merely assign a single-cell width to all
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* neutral characters, in the interest of simplicity. This is not
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* entirely satisfactory and should be reconsidered before
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* establishing a formal standard in this area. At the moment, the
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* decision which Not East Asian (Neutral) characters should be
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* represented by double-width glyphs cannot yet be answered by
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* applying a simple rule from the Unicode database content. Setting
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* up a proper standard for the behavior of UTF-8 character terminals
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* will require a careful analysis not only of each Unicode character,
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* but also of each presentation form, something the author of these
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* routines has avoided to do so far.
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*
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* http://www.unicode.org/unicode/reports/tr11/
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*
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* Markus Kuhn -- 2007-05-25 (Unicode 5.0)
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*
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* Permission to use, copy, modify, and distribute this software
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* for any purpose and without fee is hereby granted. The author
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* disclaims all warranties with regard to this software.
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*
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* Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
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*/
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#include "module.h"
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struct interval {
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int first;
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int last;
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};
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/* auxiliary function for binary search in interval table */
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static int bisearch(unichar ucs, const struct interval *table, int max) {
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int min = 0;
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int mid;
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if (ucs < table[0].first || ucs > table[max].last)
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return 0;
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while (max >= min) {
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mid = (min + max) / 2;
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if (ucs > table[mid].last)
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min = mid + 1;
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else if (ucs < table[mid].first)
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max = mid - 1;
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else
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return 1;
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}
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return 0;
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}
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/* The following two functions define the column width of an ISO 10646
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* character as follows:
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*
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* - The null character (U+0000) has a column width of 0.
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*
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* - Other C0/C1 control characters and DEL will lead to a return
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* value of -1.
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*
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* - Non-spacing and enclosing combining characters (general
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* category code Mn or Me in the Unicode database) have a
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* column width of 0.
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*
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* - SOFT HYPHEN (U+00AD) has a column width of 1.
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*
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* - Other format characters (general category code Cf in the Unicode
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* database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
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*
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* - Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
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* have a column width of 0.
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*
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* - Spacing characters in the East Asian Wide (W) or East Asian
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* Full-width (F) category as defined in Unicode Technical
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* Report #11 have a column width of 2.
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*
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* - All remaining characters (including all printable
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* ISO 8859-1 and WGL4 characters, Unicode control characters,
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* etc.) have a column width of 1.
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*
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* This implementation assumes that wchar_t characters are encoded
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* in ISO 10646.
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*/
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int mk_wcwidth(unichar ucs)
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{
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/* sorted list of non-overlapping intervals of non-spacing characters */
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/* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
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static const struct interval combining[] = {
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{ 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 },
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{ 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 },
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{ 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 },
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{ 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 },
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{ 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED },
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{ 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A },
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{ 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 },
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{ 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D },
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{ 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 },
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{ 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD },
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{ 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C },
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{ 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D },
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{ 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC },
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{ 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD },
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{ 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C },
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{ 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D },
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{ 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 },
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{ 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 },
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{ 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC },
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{ 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD },
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{ 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D },
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{ 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 },
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{ 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E },
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{ 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC },
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{ 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 },
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{ 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E },
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{ 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 },
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{ 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 },
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{ 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 },
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{ 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F },
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{ 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 },
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{ 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD },
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{ 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD },
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{ 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 },
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{ 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B },
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{ 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 },
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{ 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 },
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{ 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF },
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{ 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 },
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{ 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F },
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{ 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B },
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{ 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F },
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{ 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB },
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{ 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F },
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{ 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 },
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{ 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD },
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{ 0x1D242, 0x1D244 }, { 0xE0001, 0xE0001 }, { 0xE0020, 0xE007F },
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{ 0xE0100, 0xE01EF }
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};
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/* test for 8-bit control characters */
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if (ucs == 0)
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return 0;
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if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0))
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return -1;
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/* binary search in table of non-spacing characters */
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if (bisearch(ucs, combining,
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sizeof(combining) / sizeof(struct interval) - 1))
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return 0;
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/* if we arrive here, ucs is not a combining or C0/C1 control character */
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return 1 +
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(ucs >= 0x1100 &&
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(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)));
|
||||
}
|
||||
|
||||
|
||||
#if 0
|
||||
int mk_wcswidth(const unichar *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;
|
||||
}
|
||||
#endif
|
@ -141,7 +141,7 @@ static int pos2scrpos(GUI_ENTRY_REC *entry, int pos)
|
||||
if (term_type == TERM_TYPE_BIG5)
|
||||
xpos += big5_width(*p);
|
||||
else if (entry->utf8)
|
||||
xpos += utf8_width(*p);
|
||||
xpos += mk_wcwidth(*p);
|
||||
else
|
||||
xpos++;
|
||||
}
|
||||
@ -158,7 +158,7 @@ static int scrpos2pos(GUI_ENTRY_REC *entry, int pos)
|
||||
if (term_type == TERM_TYPE_BIG5)
|
||||
width = big5_width(*p);
|
||||
else if (entry->utf8)
|
||||
width = utf8_width(*p);
|
||||
width = mk_wcwidth(*p);
|
||||
else
|
||||
width = 1;
|
||||
|
||||
@ -223,7 +223,7 @@ static void gui_entry_draw_from(GUI_ENTRY_REC *entry, int pos)
|
||||
else if (term_type == TERM_TYPE_BIG5)
|
||||
xpos += big5_width(*p);
|
||||
else if (entry->utf8)
|
||||
xpos += utf8_width(*p);
|
||||
xpos += mk_wcwidth(*p);
|
||||
else
|
||||
xpos++;
|
||||
|
||||
@ -513,7 +513,7 @@ static size_t cell_width(unichar *buf, int len)
|
||||
{
|
||||
unichar *str = buf;
|
||||
|
||||
while (len-- && utf8_width(*str--) == 0);
|
||||
while (len-- && mk_wcwidth(*str--) == 0);
|
||||
return buf - str;
|
||||
}
|
||||
|
||||
|
@ -425,7 +425,7 @@ void term_add_unichar(TERM_WINDOW *window, unichar chr)
|
||||
|
||||
switch (term_type) {
|
||||
case TERM_TYPE_UTF8:
|
||||
term_printed_text(utf8_width(chr));
|
||||
term_printed_text(mk_wcwidth(chr));
|
||||
term_addch_utf8(window, chr);
|
||||
break;
|
||||
case TERM_TYPE_BIG5:
|
||||
|
@ -218,7 +218,7 @@ view_update_line_cache(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line)
|
||||
if (get_utf8_char(&next_ptr, char_len, &chr) < 0)
|
||||
char_len = 1;
|
||||
else
|
||||
char_len = utf8_width(chr);
|
||||
char_len = mk_wcwidth(chr);
|
||||
next_ptr++;
|
||||
}
|
||||
|
||||
@ -439,7 +439,7 @@ static int view_line_draw(TEXT_BUFFER_VIEW_REC *view, LINE_REC *line,
|
||||
if (get_utf8_char(&end, 6, &chr)<0)
|
||||
char_width = 1;
|
||||
else
|
||||
char_width = utf8_width(chr);
|
||||
char_width = mk_wcwidth(chr);
|
||||
} else {
|
||||
if (term_type == TERM_TYPE_BIG5 &&
|
||||
is_big5(end[0], end[1]))
|
||||
|
Loading…
Reference in New Issue
Block a user