| /* |
| * 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) |
| { |
| 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 */ |
| } |
| |
| /* Zero-Width invisible characters: |
| * |
| * 00AD SOFT HYPHEN |
| * 034F COMBINING GRAPHEME JOINER |
| * |
| * 180E MONGOLIAN VOWEL SEPARATOR |
| * |
| * 200B ZERO WIDTH SPACE |
| * 200C ZERO WIDTH NON-JOINER |
| * 200D ZERO WIDTH JOINER |
| * 200E LEFT-TO-RIGHT MARK |
| * 200F RIGHT-TO-LEFT MARK |
| * |
| * 2028 LINE SEPARATOR |
| * |
| * 202A LEFT-TO-RIGHT EMBEDDING |
| * 202B RIGHT-TO-LEFT EMBEDDING |
| * 202C POP DIRECTIONAL FORMATTING |
| * 202D LEFT-TO-RIGHT OVERRIDE |
| * 202E RIGHT-TO-LEFT OVERRIDE |
| * |
| * 2060 WORD JOINER |
| * 2061 FUNCTION APPLICATION |
| * 2062 INVISIBLE TIMES |
| * 2063 INVISIBLE SEPARATOR |
| * |
| * FEFF ZERO WIDTH NO-BREAK SPACE |
| */ |
| inline hb_bool_t |
| is_zero_width (hb_codepoint_t ch) |
| { |
| return ((ch & ~0x007F) == 0x2000 && (hb_in_ranges<hb_codepoint_t> (ch, |
| 0x200B, 0x200F, |
| 0x202A, 0x202E, |
| 0x2060, 0x2064) || |
| (ch == 0x2028))) || |
| unlikely (ch == 0x0009 || |
| ch == 0x00AD || |
| ch == 0x034F || |
| ch == 0x180E || |
| ch == 0xFEFF); |
| } |
| |
| |
| 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 */ |
| |
| |
| #endif /* HB_UNICODE_PRIVATE_HH */ |