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-/*
- * 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 */