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Diffstat (limited to 'src/3rdparty/harfbuzz-ng/src/hb-unicode-private.hh')
| -rw-r--r-- | src/3rdparty/harfbuzz-ng/src/hb-unicode-private.hh | 317 |
1 files changed, 317 insertions, 0 deletions
diff --git a/src/3rdparty/harfbuzz-ng/src/hb-unicode-private.hh b/src/3rdparty/harfbuzz-ng/src/hb-unicode-private.hh new file mode 100644 index 0000000000..dd4d00138e --- /dev/null +++ b/src/3rdparty/harfbuzz-ng/src/hb-unicode-private.hh @@ -0,0 +1,317 @@ +/* + * Copyright © 2009 Red Hat, Inc. + * Copyright © 2011 Codethink Limited + * Copyright © 2010,2011,2012 Google, Inc. + * + * This is part of HarfBuzz, a text shaping library. + * + * Permission is hereby granted, without written agreement and without + * license or royalty fees, to use, copy, modify, and distribute this + * software and its documentation for any purpose, provided that the + * above copyright notice and the following two paragraphs appear in + * all copies of this software. + * + * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR + * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES + * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN + * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH + * DAMAGE. + * + * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING, + * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND + * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS + * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO + * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS. + * + * Red Hat Author(s): Behdad Esfahbod + * Codethink Author(s): Ryan Lortie + * Google Author(s): Behdad Esfahbod + */ + +#ifndef HB_UNICODE_PRIVATE_HH +#define HB_UNICODE_PRIVATE_HH + +#include "hb-private.hh" + +#include "hb-unicode.h" +#include "hb-object-private.hh" + + +extern HB_INTERNAL const uint8_t _hb_modified_combining_class[256]; + +/* + * hb_unicode_funcs_t + */ + +#define HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS \ + HB_UNICODE_FUNC_IMPLEMENT (combining_class) \ + HB_UNICODE_FUNC_IMPLEMENT (eastasian_width) \ + HB_UNICODE_FUNC_IMPLEMENT (general_category) \ + HB_UNICODE_FUNC_IMPLEMENT (mirroring) \ + HB_UNICODE_FUNC_IMPLEMENT (script) \ + HB_UNICODE_FUNC_IMPLEMENT (compose) \ + HB_UNICODE_FUNC_IMPLEMENT (decompose) \ + HB_UNICODE_FUNC_IMPLEMENT (decompose_compatibility) \ + /* ^--- Add new callbacks here */ + +/* Simple callbacks are those taking a hb_codepoint_t and returning a hb_codepoint_t */ +#define HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE \ + HB_UNICODE_FUNC_IMPLEMENT (hb_unicode_combining_class_t, combining_class) \ + HB_UNICODE_FUNC_IMPLEMENT (unsigned int, eastasian_width) \ + HB_UNICODE_FUNC_IMPLEMENT (hb_unicode_general_category_t, general_category) \ + HB_UNICODE_FUNC_IMPLEMENT (hb_codepoint_t, mirroring) \ + HB_UNICODE_FUNC_IMPLEMENT (hb_script_t, script) \ + /* ^--- Add new simple callbacks here */ + +struct hb_unicode_funcs_t { + hb_object_header_t header; + ASSERT_POD (); + + hb_unicode_funcs_t *parent; + + bool immutable; + +#define HB_UNICODE_FUNC_IMPLEMENT(return_type, name) \ + inline return_type name (hb_codepoint_t unicode) { return func.name (this, unicode, user_data.name); } +HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE +#undef HB_UNICODE_FUNC_IMPLEMENT + + inline hb_bool_t compose (hb_codepoint_t a, hb_codepoint_t b, + hb_codepoint_t *ab) + { + *ab = 0; + if (unlikely (!a || !b)) return false; + return func.compose (this, a, b, ab, user_data.compose); + } + + inline hb_bool_t decompose (hb_codepoint_t ab, + hb_codepoint_t *a, hb_codepoint_t *b) + { + *a = ab; *b = 0; + return func.decompose (this, ab, a, b, user_data.decompose); + } + + inline unsigned int decompose_compatibility (hb_codepoint_t u, + hb_codepoint_t *decomposed) + { + unsigned int ret = func.decompose_compatibility (this, u, decomposed, user_data.decompose_compatibility); + if (ret == 1 && u == decomposed[0]) { + decomposed[0] = 0; + return 0; + } + decomposed[ret] = 0; + return ret; + } + + + unsigned int + modified_combining_class (hb_codepoint_t unicode) + { + /* XXX This hack belongs to the Myanmar shaper. */ + if (unicode == 0x1037) unicode = 0x103A; + + return _hb_modified_combining_class[combining_class (unicode)]; + } + + inline hb_bool_t + is_variation_selector (hb_codepoint_t unicode) + { + return unlikely (hb_in_ranges<hb_codepoint_t> (unicode, + 0x180B, 0x180D, /* MONGOLIAN FREE VARIATION SELECTOR ONE..THREE */ + 0xFE00, 0xFE0F, /* VARIATION SELECTOR-1..16 */ + 0xE0100, 0xE01EF)); /* VARIATION SELECTOR-17..256 */ + } + + /* Default_Ignorable codepoints: + * + * Note that as of Oct 2012 (Unicode 6.2), U+180E MONGOLIAN VOWEL SEPARATOR + * is NOT Default_Ignorable, but it really behaves in a way that it should + * be. That has been reported to the Unicode Technical Committee for + * consideration. As such, we include it here, since Uniscribe removes it. + * It *is* in Unicode 6.3 however. U+061C ARABIC LETTER MARK from Unicode + * 6.3 is also added manually. The new Unicode 6.3 bidi formatting + * characters are encoded in a block that was Default_Ignorable already. + * + * Note: While U+115F and U+1160 are Default_Ignorable, we do NOT want to + * hide them, as the way Uniscribe has implemented them is with regular + * spacing glyphs, and that's the way fonts are made to work. As such, + * we make exceptions for those two. + * + * Gathered from: + * http://unicode.org/cldr/utility/list-unicodeset.jsp?a=[:DI:]&abb=on&ucd=on&esc=on + * + * Last updated to the page with the following versions: + * Version 3.6; ICU version: 50.0.1.0; Unicode version: 6.1.0.0 + * + * 4,167 Code Points + * + * [\u00AD\u034F\u115F\u1160\u17B4\u17B5\u180B-\u180D\u200B-\u200F\u202A-\u202E\u2060-\u206F\u3164\uFE00-\uFE0F\uFEFF\uFFA0\uFFF0-\uFFF8\U0001D173-\U0001D17A\U000E0000-\U000E0FFF] + * + * 00AD ;SOFT HYPHEN + * 034F ;COMBINING GRAPHEME JOINER + * #115F ;HANGUL CHOSEONG FILLER + * #1160 ;HANGUL JUNGSEONG FILLER + * 17B4 ;KHMER VOWEL INHERENT AQ + * 17B5 ;KHMER VOWEL INHERENT AA + * 180B..180D ;MONGOLIAN FREE VARIATION SELECTOR THREE + * 200B..200F ;RIGHT-TO-LEFT MARK + * 202A..202E ;RIGHT-TO-LEFT OVERRIDE + * 2060..206F ;NOMINAL DIGIT SHAPES + * 3164 ;HANGUL FILLER + * FE00..FE0F ;VARIATION SELECTOR-16 + * FEFF ;ZERO WIDTH NO-BREAK SPACE + * FFA0 ;HALFWIDTH HANGUL FILLER + * FFF0..FFF8 ;<unassigned-FFF8> + * 1D173..1D17A ;MUSICAL SYMBOL END PHRASE + * E0000..E0FFF ;<unassigned-E0FFF> + */ + inline hb_bool_t + is_default_ignorable (hb_codepoint_t ch) + { + hb_codepoint_t plane = ch >> 16; + if (likely (plane == 0)) + { + /* BMP */ + hb_codepoint_t page = ch >> 8; + switch (page) { + case 0x00: return unlikely (ch == 0x00AD); + case 0x03: return unlikely (ch == 0x034F); + case 0x06: return unlikely (ch == 0x061C); + case 0x17: return hb_in_range<hb_codepoint_t> (ch, 0x17B4, 0x17B5); + case 0x18: return hb_in_range<hb_codepoint_t> (ch, 0x180B, 0x180E); + case 0x20: return hb_in_ranges<hb_codepoint_t> (ch, 0x200B, 0x200F, + 0x202A, 0x202E, + 0x2060, 0x206F); + case 0x31: return unlikely (ch == 0x3164); + case 0xFE: return hb_in_range<hb_codepoint_t> (ch, 0xFE00, 0xFE0F) || ch == 0xFEFF; + case 0xFF: return hb_in_range<hb_codepoint_t> (ch, 0xFFF0, 0xFFF8) || ch == 0xFFA0; + default: return false; + } + } + else + { + /* Other planes */ + switch (plane) { + case 0x01: return hb_in_range<hb_codepoint_t> (ch, 0x0001D173, 0x0001D17A); + case 0x0E: return hb_in_range<hb_codepoint_t> (ch, 0x000E0000, 0x000E0FFF); + default: return false; + } + } + } + + + struct { +#define HB_UNICODE_FUNC_IMPLEMENT(name) hb_unicode_##name##_func_t name; + HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS +#undef HB_UNICODE_FUNC_IMPLEMENT + } func; + + struct { +#define HB_UNICODE_FUNC_IMPLEMENT(name) void *name; + HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS +#undef HB_UNICODE_FUNC_IMPLEMENT + } user_data; + + struct { +#define HB_UNICODE_FUNC_IMPLEMENT(name) hb_destroy_func_t name; + HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS +#undef HB_UNICODE_FUNC_IMPLEMENT + } destroy; +}; + + +extern HB_INTERNAL const hb_unicode_funcs_t _hb_unicode_funcs_nil; + + +/* Modified combining marks */ + +/* Hebrew + * + * We permute the "fixed-position" classes 10-26 into the order + * described in the SBL Hebrew manual: + * + * http://www.sbl-site.org/Fonts/SBLHebrewUserManual1.5x.pdf + * + * (as recommended by: + * http://forum.fontlab.com/archive-old-microsoft-volt-group/vista-and-diacritic-ordering-t6751.0.html) + * + * More details here: + * https://bugzilla.mozilla.org/show_bug.cgi?id=662055 + */ +#define HB_MODIFIED_COMBINING_CLASS_CCC10 22 /* sheva */ +#define HB_MODIFIED_COMBINING_CLASS_CCC11 15 /* hataf segol */ +#define HB_MODIFIED_COMBINING_CLASS_CCC12 16 /* hataf patah */ +#define HB_MODIFIED_COMBINING_CLASS_CCC13 17 /* hataf qamats */ +#define HB_MODIFIED_COMBINING_CLASS_CCC14 23 /* hiriq */ +#define HB_MODIFIED_COMBINING_CLASS_CCC15 18 /* tsere */ +#define HB_MODIFIED_COMBINING_CLASS_CCC16 19 /* segol */ +#define HB_MODIFIED_COMBINING_CLASS_CCC17 20 /* patah */ +#define HB_MODIFIED_COMBINING_CLASS_CCC18 21 /* qamats */ +#define HB_MODIFIED_COMBINING_CLASS_CCC19 14 /* holam */ +#define HB_MODIFIED_COMBINING_CLASS_CCC20 24 /* qubuts */ +#define HB_MODIFIED_COMBINING_CLASS_CCC21 12 /* dagesh */ +#define HB_MODIFIED_COMBINING_CLASS_CCC22 25 /* meteg */ +#define HB_MODIFIED_COMBINING_CLASS_CCC23 13 /* rafe */ +#define HB_MODIFIED_COMBINING_CLASS_CCC24 10 /* shin dot */ +#define HB_MODIFIED_COMBINING_CLASS_CCC25 11 /* sin dot */ +#define HB_MODIFIED_COMBINING_CLASS_CCC26 26 /* point varika */ + +/* + * Arabic + * + * Modify to move Shadda (ccc=33) before other marks. See: + * http://unicode.org/faq/normalization.html#8 + * http://unicode.org/faq/normalization.html#9 + */ +#define HB_MODIFIED_COMBINING_CLASS_CCC27 28 /* fathatan */ +#define HB_MODIFIED_COMBINING_CLASS_CCC28 29 /* dammatan */ +#define HB_MODIFIED_COMBINING_CLASS_CCC29 30 /* kasratan */ +#define HB_MODIFIED_COMBINING_CLASS_CCC30 31 /* fatha */ +#define HB_MODIFIED_COMBINING_CLASS_CCC31 32 /* damma */ +#define HB_MODIFIED_COMBINING_CLASS_CCC32 33 /* kasra */ +#define HB_MODIFIED_COMBINING_CLASS_CCC33 27 /* shadda */ +#define HB_MODIFIED_COMBINING_CLASS_CCC34 34 /* sukun */ +#define HB_MODIFIED_COMBINING_CLASS_CCC35 35 /* superscript alef */ + +/* Syriac */ +#define HB_MODIFIED_COMBINING_CLASS_CCC36 36 /* superscript alaph */ + +/* Telugu + * + * Modify Telugu length marks (ccc=84, ccc=91). + * These are the only matras in the main Indic scripts range that have + * a non-zero ccc. That makes them reorder with the Halant that is + * ccc=9. Just zero them, we don't need them in our Indic shaper. + */ +#define HB_MODIFIED_COMBINING_CLASS_CCC84 0 /* length mark */ +#define HB_MODIFIED_COMBINING_CLASS_CCC91 0 /* ai length mark */ + +/* Thai + * + * Modify U+0E38 and U+0E39 (ccc=103) to be reordered before U+0E3A (ccc=9). + * Assign 3, which is unassigned otherwise. + * Uniscribe does this reordering too. + */ +#define HB_MODIFIED_COMBINING_CLASS_CCC103 3 /* sara u / sara uu */ +#define HB_MODIFIED_COMBINING_CLASS_CCC107 107 /* mai * */ + +/* Lao */ +#define HB_MODIFIED_COMBINING_CLASS_CCC118 118 /* sign u / sign uu */ +#define HB_MODIFIED_COMBINING_CLASS_CCC122 122 /* mai * */ + +/* Tibetan */ +#define HB_MODIFIED_COMBINING_CLASS_CCC129 129 /* sign aa */ +#define HB_MODIFIED_COMBINING_CLASS_CCC130 130 /* sign i */ +#define HB_MODIFIED_COMBINING_CLASS_CCC132 132 /* sign u */ + + +/* Misc */ + +#define HB_UNICODE_GENERAL_CATEGORY_IS_MARK(gen_cat) \ + (FLAG (gen_cat) & \ + (FLAG (HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK) | \ + FLAG (HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) | \ + FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK))) + + +#endif /* HB_UNICODE_PRIVATE_HH */ |