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gfx/harfbuzz/src/hb-ot-shape-complex-indic-machine.rl@129ffea94266 (annotated)

gfx/harfbuzz/src/hb-ot-shape-complex-indic-machine.rl

Sat, 03 Jan 2015 20:18:00 +0100

author
Michael Schloh von Bennewitz <michael@schloh.com>
date
Sat, 03 Jan 2015 20:18:00 +0100
branch
TOR_BUG_3246
changeset 7
129ffea94266
permissions
-rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

michael@0 1 /*
michael@0 2 * Copyright © 2011,2012 Google, Inc.
michael@0 3 *
michael@0 4 * This is part of HarfBuzz, a text shaping library.
michael@0 5 *
michael@0 6 * Permission is hereby granted, without written agreement and without
michael@0 7 * license or royalty fees, to use, copy, modify, and distribute this
michael@0 8 * software and its documentation for any purpose, provided that the
michael@0 9 * above copyright notice and the following two paragraphs appear in
michael@0 10 * all copies of this software.
michael@0 11 *
michael@0 12 * IN NO EVENT SHALL THE COPYRIGHT HOLDER BE LIABLE TO ANY PARTY FOR
michael@0 13 * DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
michael@0 14 * ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN
michael@0 15 * IF THE COPYRIGHT HOLDER HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH
michael@0 16 * DAMAGE.
michael@0 17 *
michael@0 18 * THE COPYRIGHT HOLDER SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
michael@0 19 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
michael@0 20 * FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE PROVIDED HEREUNDER IS
michael@0 21 * ON AN "AS IS" BASIS, AND THE COPYRIGHT HOLDER HAS NO OBLIGATION TO
michael@0 22 * PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
michael@0 23 *
michael@0 24 * Google Author(s): Behdad Esfahbod
michael@0 25 */
michael@0 26
michael@0 27 #ifndef HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH
michael@0 28 #define HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH
michael@0 29
michael@0 30 #include "hb-private.hh"
michael@0 31
michael@0 32 %%{
michael@0 33 machine indic_syllable_machine;
michael@0 34 alphtype unsigned char;
michael@0 35 write data;
michael@0 36 }%%
michael@0 37
michael@0 38 %%{
michael@0 39
michael@0 40 # Same order as enum indic_category_t. Not sure how to avoid duplication.
michael@0 41 X = 0;
michael@0 42 C = 1;
michael@0 43 V = 2;
michael@0 44 N = 3;
michael@0 45 H = 4;
michael@0 46 ZWNJ = 5;
michael@0 47 ZWJ = 6;
michael@0 48 M = 7;
michael@0 49 SM = 8;
michael@0 50 VD = 9;
michael@0 51 A = 10;
michael@0 52 NBSP = 11;
michael@0 53 DOTTEDCIRCLE = 12;
michael@0 54 RS = 13;
michael@0 55 Coeng = 14;
michael@0 56 Repha = 15;
michael@0 57 Ra = 16;
michael@0 58 CM = 17;
michael@0 59 Avag = 18;
michael@0 60 CM2 = 31;
michael@0 61
michael@0 62 c = (C | Ra); # is_consonant
michael@0 63 n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
michael@0 64 z = ZWJ|ZWNJ; # is_joiner
michael@0 65 h = H | Coeng; # is_halant_or_coeng
michael@0 66 reph = (Ra H | Repha); # possible reph
michael@0 67
michael@0 68 cn = c.ZWJ?.n?;
michael@0 69 forced_rakar = ZWJ H ZWJ Ra;
michael@0 70 avagraha = Avag.N?;
michael@0 71 matra_group = z{0,3}.M.N?.(H | forced_rakar)?;
michael@0 72 syllable_tail2 = (SM.SM?.ZWNJ?)? (A.A?)? VD?;
michael@0 73 syllable_tail = (Coeng (cn|V))? avagraha? syllable_tail2;
michael@0 74 place_holder = NBSP | DOTTEDCIRCLE;
michael@0 75 halant_group = (z?.h.(ZWJ.N?)?);
michael@0 76 final_halant_group = halant_group | h.ZWNJ;
michael@0 77 medial_group = CM?.CM2?;
michael@0 78 halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4});
michael@0 79
michael@0 80
michael@0 81 consonant_syllable = Repha? (cn.halant_group){0,4} cn medial_group halant_or_matra_group syllable_tail;
michael@0 82 vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail);
michael@0 83 standalone_cluster = reph? place_holder.n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
michael@0 84 avagraha_cluster = avagraha syllable_tail2;
michael@0 85 broken_cluster = reph? n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
michael@0 86 other = any;
michael@0 87
michael@0 88 main := |*
michael@0 89 consonant_syllable => { found_syllable (consonant_syllable); };
michael@0 90 vowel_syllable => { found_syllable (vowel_syllable); };
michael@0 91 standalone_cluster => { found_syllable (standalone_cluster); };
michael@0 92 avagraha_cluster => { found_syllable (avagraha_cluster); };
michael@0 93 broken_cluster => { found_syllable (broken_cluster); };
michael@0 94 other => { found_syllable (non_indic_cluster); };
michael@0 95 *|;
michael@0 96
michael@0 97
michael@0 98 }%%
michael@0 99
michael@0 100 #define found_syllable(syllable_type) \
michael@0 101 HB_STMT_START { \
michael@0 102 if (0) fprintf (stderr, "syllable %d..%d %s\n", last, p+1, #syllable_type); \
michael@0 103 for (unsigned int i = last; i < p+1; i++) \
michael@0 104 info[i].syllable() = (syllable_serial << 4) | syllable_type; \
michael@0 105 last = p+1; \
michael@0 106 syllable_serial++; \
michael@0 107 if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
michael@0 108 } HB_STMT_END
michael@0 109
michael@0 110 static void
michael@0 111 find_syllables (hb_buffer_t *buffer)
michael@0 112 {
michael@0 113 unsigned int p, pe, eof, ts HB_UNUSED, te HB_UNUSED, act HB_UNUSED;
michael@0 114 int cs;
michael@0 115 hb_glyph_info_t *info = buffer->info;
michael@0 116 %%{
michael@0 117 write init;
michael@0 118 getkey info[p].indic_category();
michael@0 119 }%%
michael@0 120
michael@0 121 p = 0;
michael@0 122 pe = eof = buffer->len;
michael@0 123
michael@0 124 unsigned int last = 0;
michael@0 125 unsigned int syllable_serial = 1;
michael@0 126 %%{
michael@0 127 write exec;
michael@0 128 }%%
michael@0 129 }
michael@0 130
michael@0 131 #endif /* HB_OT_SHAPE_COMPLEX_INDIC_MACHINE_HH */

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