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/*
* Copyright © 2015 Mozilla Foundation.
* Copyright © 2015 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.
*
* Mozilla Author(s): Jonathan Kew
* Google Author(s): Behdad Esfahbod
*/
#ifndef HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH
#define HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH
#include "hb.hh"
%%{
machine use_syllable_machine;
alphtype unsigned char;
write data;
}%%
%%{
# Same order as enum use_category_t. Not sure how to avoid duplication.
O = 0; # OTHER
B = 1; # BASE
IND = 3; # BASE_IND
N = 4; # BASE_NUM
GB = 5; # BASE_OTHER
CGJ = 6; # CGJ
#F = 7; # CONS_FINAL
#FM = 8; # CONS_FINAL_MOD
#M = 9; # CONS_MED
#CM = 10; # CONS_MOD
SUB = 11; # CONS_SUB
H = 12; # HALANT
HN = 13; # HALANT_NUM
ZWNJ = 14; # Zero width non-joiner
ZWJ = 15; # Zero width joiner
WJ = 16; # Word joiner
Rsv = 17; # Reserved characters
R = 18; # REPHA
S = 19; # SYM
#SM = 20; # SYM_MOD
VS = 21; # VARIATION_SELECTOR
#V = 36; # VOWEL
#VM = 40; # VOWEL_MOD
CS = 43; # CONS_WITH_STACKER
HVM = 44; # HALANT_OR_VOWEL_MODIFIER
Sk = 48; # SAKOT
FAbv = 24; # CONS_FINAL_ABOVE
FBlw = 25; # CONS_FINAL_BELOW
FPst = 26; # CONS_FINAL_POST
MAbv = 27; # CONS_MED_ABOVE
MBlw = 28; # CONS_MED_BELOW
MPst = 29; # CONS_MED_POST
MPre = 30; # CONS_MED_PRE
CMAbv = 31; # CONS_MOD_ABOVE
CMBlw = 32; # CONS_MOD_BELOW
VAbv = 33; # VOWEL_ABOVE / VOWEL_ABOVE_BELOW / VOWEL_ABOVE_BELOW_POST / VOWEL_ABOVE_POST
VBlw = 34; # VOWEL_BELOW / VOWEL_BELOW_POST
VPst = 35; # VOWEL_POST UIPC = Right
VPre = 22; # VOWEL_PRE / VOWEL_PRE_ABOVE / VOWEL_PRE_ABOVE_POST / VOWEL_PRE_POST
VMAbv = 37; # VOWEL_MOD_ABOVE
VMBlw = 38; # VOWEL_MOD_BELOW
VMPst = 39; # VOWEL_MOD_POST
VMPre = 23; # VOWEL_MOD_PRE
SMAbv = 41; # SYM_MOD_ABOVE
SMBlw = 42; # SYM_MOD_BELOW
FMAbv = 45; # CONS_FINAL_MOD UIPC = Top
FMBlw = 46; # CONS_FINAL_MOD UIPC = Bottom
FMPst = 47; # CONS_FINAL_MOD UIPC = Not_Applicable
h = H | HVM | Sk;
# Override: Adhoc ZWJ placement. https://github.com/harfbuzz/harfbuzz/issues/542#issuecomment-353169729
consonant_modifiers = CMAbv* CMBlw* ((ZWJ?.h.ZWJ? B | SUB) VS? CMAbv? CMBlw*)*;
# Override: Allow two MBlw. https://github.com/harfbuzz/harfbuzz/issues/376
medial_consonants = MPre? MAbv? MBlw?.MBlw? MPst?;
dependent_vowels = VPre* VAbv* VBlw* VPst*;
vowel_modifiers = HVM? VMPre* VMAbv* VMBlw* VMPst*;
final_consonants = FAbv* FBlw* FPst*;
final_modifiers = FMAbv* FMBlw* | FMPst?;
complex_syllable_start = (R | CS)? (B | GB) VS?;
complex_syllable_middle =
consonant_modifiers
medial_consonants
dependent_vowels
vowel_modifiers
(Sk B)*
;
complex_syllable_tail =
complex_syllable_middle
final_consonants
final_modifiers
;
number_joiner_terminated_cluster_tail = (HN N VS?)* HN;
numeral_cluster_tail = (HN N VS?)+;
symbol_cluster_tail = SMAbv+ SMBlw* | SMBlw+;
virama_terminated_cluster =
complex_syllable_start
consonant_modifiers
ZWJ?.h.ZWJ?
;
sakot_terminated_cluster =
complex_syllable_start
complex_syllable_middle
Sk
;
standard_cluster =
complex_syllable_start
complex_syllable_tail
;
broken_cluster =
R?
(complex_syllable_tail | number_joiner_terminated_cluster_tail | numeral_cluster_tail | symbol_cluster_tail)
;
number_joiner_terminated_cluster = N VS? number_joiner_terminated_cluster_tail;
numeral_cluster = N VS? numeral_cluster_tail?;
symbol_cluster = (S | GB) VS? symbol_cluster_tail?;
independent_cluster = (IND | O | Rsv | WJ) VS?;
other = any;
main := |*
independent_cluster => { found_syllable (independent_cluster); };
virama_terminated_cluster => { found_syllable (virama_terminated_cluster); };
sakot_terminated_cluster => { found_syllable (sakot_terminated_cluster); };
standard_cluster => { found_syllable (standard_cluster); };
number_joiner_terminated_cluster => { found_syllable (number_joiner_terminated_cluster); };
numeral_cluster => { found_syllable (numeral_cluster); };
symbol_cluster => { found_syllable (symbol_cluster); };
broken_cluster => { found_syllable (broken_cluster); };
other => { found_syllable (non_cluster); };
*|;
}%%
#define found_syllable(syllable_type) \
HB_STMT_START { \
if (0) fprintf (stderr, "syllable %d..%d %s\n", ts, te, #syllable_type); \
for (unsigned int i = ts; i < te; i++) \
info[i].syllable() = (syllable_serial << 4) | use_##syllable_type; \
syllable_serial++; \
if (unlikely (syllable_serial == 16)) syllable_serial = 1; \
} HB_STMT_END
static void
find_syllables_use (hb_buffer_t *buffer)
{
unsigned int p, pe, eof, ts, te, act;
int cs;
hb_glyph_info_t *info = buffer->info;
%%{
write init;
getkey info[p].use_category();
}%%
p = 0;
pe = eof = buffer->len;
unsigned int syllable_serial = 1;
%%{
write exec;
}%%
}
#undef found_syllable
#endif /* HB_OT_SHAPE_COMPLEX_USE_MACHINE_HH */
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