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[unicode] Move Fitzpatrick hack from ot-layout into unicode.hh

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This commit is contained in:
Behdad Esfahbod 2018-09-14 14:23:09 +02:00
parent 6ebbf514ac
commit 01b9148d9a
2 changed files with 28 additions and 20 deletions
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12
src/hb-ot-layout.hh
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@ -245,7 +245,7 @@ _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
props |= UPROPS_MASK_HIDDEN;
}
}
else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL (gen_cat)))
else if (unlikely (HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK (gen_cat)))
{
/* The above check is just an optimization to let in only things we need further
* processing on. */
@ -264,16 +264,6 @@ _hb_glyph_info_set_unicode_props (hb_glyph_info_t *info, hb_buffer_t *buffer)
* the "else if".
*/
props |= unicode->modified_combining_class (u)<<8;
/* Recategorize emoji skin-tone modifiers as Unicode mark, so they
* behave correctly in non-native directionality. They originally
* are MODIFIER_SYMBOL. Fixes:
* https://github.com/harfbuzz/harfbuzz/issues/169
*/
if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu)))
{
props = gen_cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
}
}
}

36
src/hb-unicode.hh
View File

@ -102,23 +102,42 @@ HB_UNICODE_FUNCS_IMPLEMENT_CALLBACKS_SIMPLE
}
inline hb_unicode_general_category_t
modified_general_category (hb_codepoint_t u)
{
hb_unicode_general_category_t cat = general_category (u);
if (unlikely (cat == HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL))
{
/* Recategorize emoji skin-tone modifiers as Unicode mark, so they
* behave correctly in non-native directionality. They originally
* are MODIFIER_SYMBOL. Fixes:
* https://github.com/harfbuzz/harfbuzz/issues/169
*/
if (unlikely (hb_in_range (u, 0x1F3FBu, 0x1F3FFu)))
cat = HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK;
}
return cat;
}
inline unsigned int
modified_combining_class (hb_codepoint_t unicode)
modified_combining_class (hb_codepoint_t u)
{
/* XXX This hack belongs to the Myanmar shaper. */
if (unlikely (unicode == 0x1037u)) unicode = 0x103Au;
if (unlikely (u == 0x1037u)) u = 0x103Au;
/* XXX This hack belongs to the USE shaper (for Tai Tham):
* Reorder SAKOT to ensure it comes after any tone marks. */
if (unlikely (unicode == 0x1A60u)) return 254;
if (unlikely (u == 0x1A60u)) return 254;
/* XXX This hack belongs to the Tibetan shaper:
* Reorder PADMA to ensure it comes after any vowel marks. */
if (unlikely (unicode == 0x0FC6u)) return 254;
if (unlikely (u == 0x0FC6u)) return 254;
/* Reorder TSA -PHRU to reorder before U+0F74 */
if (unlikely (unicode == 0x0F39u)) return 127;
if (unlikely (u == 0x0F39u)) return 127;
return _hb_modified_combining_class[combining_class (unicode)];
return _hb_modified_combining_class[combining_class (u)];
}
static inline hb_bool_t
@ -360,10 +379,9 @@ DECLARE_NULL_INSTANCE (hb_unicode_funcs_t);
FLAG (HB_UNICODE_GENERAL_CATEGORY_ENCLOSING_MARK) | \
FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)))
#define HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK_OR_MODIFIER_SYMBOL(gen_cat) \
#define HB_UNICODE_GENERAL_CATEGORY_IS_NON_ENCLOSING_MARK(gen_cat) \
(FLAG_UNSAFE (gen_cat) & \
(FLAG (HB_UNICODE_GENERAL_CATEGORY_SPACING_MARK) | \
FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK) | \
FLAG (HB_UNICODE_GENERAL_CATEGORY_MODIFIER_SYMBOL)))
FLAG (HB_UNICODE_GENERAL_CATEGORY_NON_SPACING_MARK)))
#endif /* HB_UNICODE_HH */