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[indic] Add Javanese support!

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Seems to be working just fine!
This commit is contained in:
Behdad Esfahbod 2013-10-18 02:27:00 +02:00
parent 755b44cce6
commit c16012e901
3 changed files with 34 additions and 26 deletions
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14
src/hb-ot-shape-complex-indic-machine.rl
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@ -51,12 +51,13 @@ VD = 9;
A = 10;
NBSP = 11;
DOTTEDCIRCLE = 12;
RS = 13;
RS = 13;
Coeng = 14;
Repha = 15;
Ra = 16;
CM = 17;
Avag = 18;
CM2 = 41;
c = (C | Ra); # is_consonant
n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
@ -73,14 +74,15 @@ syllable_tail = (Coeng (cn|V))? avagraha? syllable_tail2;
place_holder = NBSP | DOTTEDCIRCLE;
halant_group = (z?.h.(ZWJ.N?)?);
final_halant_group = halant_group | h.ZWNJ;
halant_or_matra_group = (CM.CM* | final_halant_group | (h.ZWJ)? matra_group{0,4});
medial_group = CM?.CM2?;
halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4});
consonant_syllable = Repha? (cn.halant_group){0,4} cn halant_or_matra_group? syllable_tail;
vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} halant_or_matra_group? syllable_tail);
standalone_cluster = reph? place_holder.n? (halant_group.cn){0,4} halant_or_matra_group? syllable_tail;
consonant_syllable = Repha? (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 = reph? place_holder.n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
avagraha_cluster = avagraha syllable_tail2;
broken_cluster = reph? n? (halant_group.cn){0,4} halant_or_matra_group syllable_tail;
broken_cluster = reph? n? (halant_group.cn){0,4} medial_group halant_or_matra_group syllable_tail;
other = any;
main := |*

37
src/hb-ot-shape-complex-indic-private.hh
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@ -43,24 +43,25 @@
* Not sure how to avoid duplication. */
enum indic_category_t {
OT_X = 0,
OT_C,
OT_V,
OT_N,
OT_H,
OT_ZWNJ,
OT_ZWJ,
OT_M,
OT_SM,
OT_VD,
OT_A,
OT_NBSP,
OT_DOTTEDCIRCLE, /* Not in the spec, but special in Uniscribe. /Very very/ special! */
OT_RS, /* Register Shifter, used in Khmer OT spec */
OT_Coeng,
OT_Repha,
OT_Ra, /* Not explicitly listed in the OT spec, but used in the grammar. */
OT_CM,
OT_Avag
OT_C = 1,
OT_V = 2,
OT_N = 3,
OT_H = 4,
OT_ZWNJ = 5,
OT_ZWJ = 6,
OT_M = 7,
OT_SM = 8,
OT_VD = 9,
OT_A = 10,
OT_NBSP = 11,
OT_DOTTEDCIRCLE = 12,
OT_RS = 13, /* Register Shifter, used in Khmer OT spec. */
OT_Coeng = 14, /* Khmer-style Virama. */
OT_Repha = 15, /* Atomically-encoded logical or visual repha. */
OT_Ra = 16,
OT_CM = 17, /* Consonant-Medial. */
OT_Avag = 18, /* Avagraha. */
OT_CM2 = 41 /* Consonant-Medial, second slot. */
};
/* Visual positions in a syllable from left to right. */

9
src/hb-ot-shape-complex-indic.cc
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@ -152,12 +152,14 @@ is_joiner (const hb_glyph_info_t &info)
return is_one_of (info, JOINER_FLAGS);
}
#define MEDIAL_FLAGS (FLAG (OT_CM) | FLAG (OT_CM2))
/* Note:
*
* 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_CM) | FLAG (OT_Ra) | FLAG (OT_V) | FLAG (OT_NBSP) | FLAG (OT_DOTTEDCIRCLE))
#define CONSONANT_FLAGS (FLAG (OT_C) | FLAG (OT_Ra) | MEDIAL_FLAGS | FLAG (OT_V) | FLAG (OT_NBSP) | FLAG (OT_DOTTEDCIRCLE))
static inline bool
is_consonant (const hb_glyph_info_t &info)
{
@ -213,6 +215,9 @@ set_indic_properties (hb_glyph_info_t &info)
else if (unlikely (u == 0x200D)) cat = OT_ZWJ;
else if (unlikely (u == 0x25CC)) cat = OT_DOTTEDCIRCLE;
else if (unlikely (u == 0x0A71)) cat = OT_SM; /* GURMUKHI ADDAK. Move it to the end. */
else if (unlikely (u == 0xA982)) cat = OT_SM; /* Javanese repha. */
else if (unlikely (u == 0xA9BE)) cat = OT_CM2; /* Javanese medial ya. */
else if (unlikely (u == 0xA9BD)) { cat = OT_M; pos = POS_POST_C; } /* Javanese vocalic r. */
if (cat == OT_Repha) {
/* There are two kinds of characters marked as Repha:
@ -931,7 +936,7 @@ initial_reordering_consonant_syllable (const hb_ot_shape_plan_t *plan,
indic_position_t last_pos = POS_START;
for (unsigned int i = start; i < end; i++)
{
if ((FLAG (info[i].indic_category()) & (JOINER_FLAGS | FLAG (OT_N) | FLAG (OT_RS) | HALANT_OR_COENG_FLAGS)))
if ((FLAG (info[i].indic_category()) & (JOINER_FLAGS | FLAG (OT_N) | FLAG (OT_RS) | MEDIAL_FLAGS | HALANT_OR_COENG_FLAGS)))
{
info[i].indic_position() = last_pos;
if (unlikely (info[i].indic_category() == OT_H &&