From d86a5b3c5752abcc791724035ba4115958e6b5e2 Mon Sep 17 00:00:00 2001 From: Behdad Esfahbod Date: Tue, 21 Dec 2010 18:36:25 -0500 Subject: [PATCH] Bug 32274 - classic mongolian shaper Add support for classic Mongolian script to the Arabic shaper. Still work to be done around U+180E MONGOLIAN VOWEL SEPARATOR as it should not be included in the final glyph stream the same way that ZWNJ, etc should not appear in the final glyph stream. But the joining part should be done. There remains the question of how should the U+18A9 MONGOLIAN LETTER ALI GALI DAGALGA be handled as it has General Category NSM but a letter nonetheless. For now, our generic logic makes this a joining T instead of joining D as other Mongolian letters are. --- src/hb-ot-shape-complex-arabic.cc | 8 ++++++++ src/hb-ot-shape-complex-private.hh | 1 + 2 files changed, 9 insertions(+) diff --git a/src/hb-ot-shape-complex-arabic.cc b/src/hb-ot-shape-complex-arabic.cc index 7c1b7bcbf..77a9c8230 100644 --- a/src/hb-ot-shape-complex-arabic.cc +++ b/src/hb-ot-shape-complex-arabic.cc @@ -67,6 +67,14 @@ static unsigned int get_joining_type (hb_codepoint_t u, hb_category_t gen_cat) return j_type; } + /* Mongolian joining data is not in ArabicJoining.txt yet */ + if (unlikely (0x1800 <= u && u <= 0x18AF)) + { + /* All letters, SIBE SYLLABLE BOUNDARY MARKER, and NIRUGU are D */ + if (gen_cat == HB_CATEGORY_OTHER_LETTER || u == 0x1807 || u == 0x180A) + return JOINING_TYPE_D; + } + if (unlikely ((u & ~(0x200C^0x200D)) == 0x200C)) { return u == 0x200C ? JOINING_TYPE_U : JOINING_TYPE_C; } diff --git a/src/hb-ot-shape-complex-private.hh b/src/hb-ot-shape-complex-private.hh index 788d18aa6..fed167dec 100644 --- a/src/hb-ot-shape-complex-private.hh +++ b/src/hb-ot-shape-complex-private.hh @@ -42,6 +42,7 @@ hb_ot_shape_complex_categorize (const hb_segment_properties_t *props) case HB_SCRIPT_NKO: case HB_SCRIPT_SYRIAC: case HB_SCRIPT_MANDAIC: + case HB_SCRIPT_MONGOLIAN: return hb_ot_complex_shaper_arabic; default: