[indic] Handle Avagraha
It can come either at the end(ish!) of the syllable, or independently. When independent, it accepts a few bits and pieces.
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@ -56,6 +56,7 @@ Coeng = 14;
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Repha = 15;
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Ra = 16;
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CM = 17;
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Avag = 18;
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c = (C | Ra)CM*; # is_consonant
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n = ((ZWNJ?.RS)? (N.N?)?); # is_consonant_modifier
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@ -66,7 +67,7 @@ reph = (Ra H | Repha); # possible reph
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cn = c.ZWJ?.n?;
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forced_rakar = ZWJ H ZWJ Ra;
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matra_group = z{0,3}.M.N?.(H | forced_rakar)?;
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syllable_tail = (Coeng (cn|V))? (SM.ZWNJ?)? (VD VD?)?;
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syllable_tail = (Coeng (cn|V))? (Avag.N?)? (SM.ZWNJ?)? (VD VD?)?;
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place_holder = NBSP | DOTTEDCIRCLE;
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halant_group = (z?.h.(ZWJ.N?)?);
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final_halant_group = halant_group | h.ZWNJ;
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@ -76,6 +77,7 @@ halant_or_matra_group = (final_halant_group | (h.ZWJ)? matra_group{0,4});
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consonant_syllable = Repha? (cn.halant_group){0,4} cn A? halant_or_matra_group? syllable_tail;
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vowel_syllable = reph? V.n? (ZWJ | (halant_group.cn){0,4} halant_or_matra_group? syllable_tail);
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standalone_cluster = reph? place_holder.n? (halant_group.cn){0,4} halant_or_matra_group? syllable_tail;
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avagraha_cluster = Avag.N? (SM.ZWNJ?)? (VD VD?)?;
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broken_cluster = reph? n? (halant_group.cn){0,4} halant_or_matra_group syllable_tail;
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other = any;
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@ -83,6 +85,7 @@ main := |*
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consonant_syllable => { found_syllable (consonant_syllable); };
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vowel_syllable => { found_syllable (vowel_syllable); };
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standalone_cluster => { found_syllable (standalone_cluster); };
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avagraha_cluster => { found_syllable (avagraha_cluster); };
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broken_cluster => { found_syllable (broken_cluster); };
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other => { found_syllable (non_indic_cluster); };
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*|;
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@ -59,7 +59,8 @@ enum indic_category_t {
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OT_Coeng,
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OT_Repha,
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OT_Ra, /* Not explicitly listed in the OT spec, but used in the grammar. */
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OT_CM
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OT_CM,
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OT_Avag
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};
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/* Visual positions in a syllable from left to right. */
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@ -93,7 +94,7 @@ enum indic_position_t {
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enum indic_syllabic_category_t {
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INDIC_SYLLABIC_CATEGORY_OTHER = OT_X,
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INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_X,
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INDIC_SYLLABIC_CATEGORY_AVAGRAHA = OT_Avag,
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INDIC_SYLLABIC_CATEGORY_BINDU = OT_SM,
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INDIC_SYLLABIC_CATEGORY_CONSONANT = OT_C,
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INDIC_SYLLABIC_CATEGORY_CONSONANT_DEAD = OT_C,
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@ -249,7 +249,7 @@ set_indic_properties (hb_glyph_info_t &info)
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{
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pos = matra_position (u, pos);
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}
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else if (cat == OT_SM || cat == OT_VD)
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else if (cat == OT_SM || cat == OT_VD || cat == OT_Avag)
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{
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pos = POS_SMVD;
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}
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@ -584,6 +584,7 @@ enum syllable_type_t {
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consonant_syllable,
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vowel_syllable,
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standalone_cluster,
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avagraha_cluster,
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broken_cluster,
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non_indic_cluster,
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};
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@ -1081,6 +1082,16 @@ initial_reordering_broken_cluster (const hb_ot_shape_plan_t *plan,
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initial_reordering_standalone_cluster (plan, face, buffer, start, end);
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}
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static void
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initial_reordering_avagraha_cluster (const hb_ot_shape_plan_t *plan HB_UNUSED,
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hb_face_t *face HB_UNUSED,
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hb_buffer_t *buffer HB_UNUSED,
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unsigned int start HB_UNUSED, unsigned int end HB_UNUSED)
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{
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/* Nothing to do right now. If we ever switch to using the output
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* buffer in the reordering process, we'd need to next_glyph() here. */
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}
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static void
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initial_reordering_non_indic_cluster (const hb_ot_shape_plan_t *plan HB_UNUSED,
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hb_face_t *face HB_UNUSED,
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@ -1103,6 +1114,7 @@ initial_reordering_syllable (const hb_ot_shape_plan_t *plan,
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case consonant_syllable: initial_reordering_consonant_syllable (plan, face, buffer, start, end); return;
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case vowel_syllable: initial_reordering_vowel_syllable (plan, face, buffer, start, end); return;
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case standalone_cluster: initial_reordering_standalone_cluster (plan, face, buffer, start, end); return;
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case avagraha_cluster: initial_reordering_avagraha_cluster (plan, face, buffer, start, end); return;
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case broken_cluster: initial_reordering_broken_cluster (plan, face, buffer, start, end); return;
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case non_indic_cluster: initial_reordering_non_indic_cluster (plan, face, buffer, start, end); return;
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}
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@ -30,3 +30,4 @@
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र्अ्
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र्आ्र्
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कि
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ऽं
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@ -9,3 +9,4 @@
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క్ష
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క్ష్
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క్ష్ణ
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ఽం
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