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[indic] Implement Consonent_With_Stacker 

Fixes https://github.com/behdad/harfbuzz/issues/528
This commit is contained in:
Behdad Esfahbod 2017-10-03 15:20:07 +02:00
parent e07669fc43
commit f559c63307
4 changed files with 13 additions and 10 deletions
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5
src/hb-ot-shape-complex-indic-machine.rl
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@ -57,6 +57,7 @@ Repha = 15;
Ra = 16;
CM = 17;
Symbol= 18;
CS = 19;
c = (C | Ra); # is_consonant
n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
@ -76,9 +77,9 @@ medial_group = CM?;
halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4}) (Coeng (cn|V))?;
consonant_syllable = Repha? (cn.halant_group){0,4} cn medial_group halant_or_matra_group syllable_tail;
consonant_syllable = (Repha|CS)? (cn.halant_group){0,4} cn medial_group halant_or_matra_group syllable_tail;
vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail);
standalone_cluster = (Repha? PLACEHOLDER | reph? DOTTEDCIRCLE).n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
standalone_cluster = ((Repha|CS)? PLACEHOLDER | reph? DOTTEDCIRCLE).n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
symbol_cluster = symbol syllable_tail;
broken_cluster = reph? n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
other = any;

7
src/hb-ot-shape-complex-indic-private.hh
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@ -60,7 +60,8 @@ enum indic_category_t {
OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
OT_Ra = 16,
OT_CM = 17, /* Consonant-Medial. */
OT_Symbol = 18 /* Avagraha, etc that take marks (SM,A,VD). */
OT_Symbol = 18, /* Avagraha, etc that take marks (SM,A,VD). */
OT_CS = 19
};
#define MEDIAL_FLAGS (FLAG (OT_CM))
@ -70,7 +71,7 @@ enum indic_category_t {
* We treat Vowels and placeholders as if they were consonants. This is safe because Vowels
* cannot happen in a consonant syllable. The plus side however is, we can call the
* consonant syllable logic from the vowel syllable function and get it all right! */
#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_Ra) | MEDIAL_FLAGS | FLAG (OT_V) | FLAG (OT_PLACEHOLDER) | FLAG (OT_DOTTEDCIRCLE))
#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_CS) | FLAG (OT_Ra) | MEDIAL_FLAGS | FLAG (OT_V) | FLAG (OT_PLACEHOLDER) | FLAG (OT_DOTTEDCIRCLE))
#define JOINER_FLAGS (FLAG (OT_ZWJ) | FLAG (OT_ZWNJ))
#define HALANT_OR_COENG_FLAGS (FLAG (OT_H) | FLAG (OT_Coeng))
@ -121,7 +122,7 @@ enum indic_syllabic_category_t {
INDIC_SYLLABIC_CATEGORY_CONSONANT_PREFIXED = OT_X, /* Don't care. */
INDIC_SYLLABIC_CATEGORY_CONSONANT_SUBJOINED = OT_CM,
INDIC_SYLLABIC_CATEGORY_CONSONANT_SUCCEEDING_REPHA = OT_N,
INDIC_SYLLABIC_CATEGORY_CONSONANT_WITH_STACKER = OT_C,
INDIC_SYLLABIC_CATEGORY_CONSONANT_WITH_STACKER = OT_CS,
INDIC_SYLLABIC_CATEGORY_GEMINATION_MARK = OT_SM,
INDIC_SYLLABIC_CATEGORY_INVISIBLE_STACKER = OT_Coeng,
INDIC_SYLLABIC_CATEGORY_JOINER = OT_ZWJ,

5
src/hb-ot-shape-complex-myanmar-machine.rl
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@ -41,7 +41,7 @@
A = 10;
As = 18;
C = 1;
D = 19;
D = 32;
D0 = 20;
DB = 3;
GB = 11;
@ -62,6 +62,7 @@ ZWJ = 6;
ZWNJ = 5;
Ra = 16;
P = 31;
CS = 19;
j = ZWJ|ZWNJ; # Joiners
k = (Ra As H); # Kinzi
@ -76,7 +77,7 @@ pwo_tone_group = PT A* DB? As?;
complex_syllable_tail = As* medial_group main_vowel_group post_vowel_group* pwo_tone_group* V* j?;
syllable_tail = (H | complex_syllable_tail);
consonant_syllable = k? (c|IV|D|GB).VS? (H (c|IV).VS?)* syllable_tail;
consonant_syllable = (k|CS)? (c|IV|D|GB).VS? (H (c|IV).VS?)* syllable_tail;
punctuation_cluster = P V;
broken_cluster = k? VS? syllable_tail;
other = any;

6
src/hb-ot-shape-complex-myanmar.cc
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@ -130,8 +130,7 @@ enum syllable_type_t {
/* Note: This enum is duplicated in the -machine.rl source file.
* Not sure how to avoid duplication. */
enum myanmar_category_t {
OT_As = 18, /* Asat */
OT_D = 19, /* Digits except zero */
OT_As = 18, /* Asat */
OT_D0 = 20, /* Digit zero */
OT_DB = OT_N, /* Dot below */
OT_GB = OT_PLACEHOLDER,
@ -145,7 +144,8 @@ enum myanmar_category_t {
OT_VPre = 28,
OT_VPst = 29,
OT_VS = 30, /* Variation selectors */
OT_P = 31 /* Punctuation */
OT_P = 31, /* Punctuation */
OT_D = 32, /* Digits except zero */
};