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[unsafe-to-break] Flag in Hangul shaper

This commit is contained in:
Behdad Esfahbod 2017-08-10 20:50:48 -07:00
parent b65aa1cd47
commit eae009602b
1 changed files with 6 additions and 0 deletions
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6
src/hb-ot-shape-complex-hangul.cc
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@ -202,6 +202,7 @@ preprocess_text_hangul (const hb_ot_shape_plan_t *plan,
if (start < end && end == buffer->out_len) if (start < end && end == buffer->out_len)
{ {
/* Tone mark follows a valid syllable; move it in front, unless it's zero width. */ /* Tone mark follows a valid syllable; move it in front, unless it's zero width. */
buffer->unsafe_to_break_from_outbuffer (start, buffer->idx);
buffer->next_glyph (); buffer->next_glyph ();
if (!is_zero_width_char (font, u)) if (!is_zero_width_char (font, u))
{ {
@ -258,6 +259,7 @@ preprocess_text_hangul (const hb_ot_shape_plan_t *plan,
else else
t = 0; /* The next character was not a trailing jamo. */ t = 0; /* The next character was not a trailing jamo. */
} }
buffer->unsafe_to_break (buffer->idx, buffer->idx + (t ? 3 : 2));
/* We've got a syllable <L,V,T?>; see if it can potentially be composed. */ /* We've got a syllable <L,V,T?>; see if it can potentially be composed. */
if (isCombiningL (l) && isCombiningV (v) && (t == 0 || isCombiningT (t))) if (isCombiningL (l) && isCombiningV (v) && (t == 0 || isCombiningT (t)))
@ -322,6 +324,8 @@ preprocess_text_hangul (const hb_ot_shape_plan_t *plan,
end = start + 1; end = start + 1;
continue; continue;
} }
else
buffer->unsafe_to_break (buffer->idx, buffer->idx + 2); /* Mark unsafe between LV and T. */
} }
/* Otherwise, decompose if font doesn't support <LV> or <LVT>, /* Otherwise, decompose if font doesn't support <LV> or <LVT>,
@ -368,6 +372,8 @@ preprocess_text_hangul (const hb_ot_shape_plan_t *plan,
buffer->merge_out_clusters (start, end); buffer->merge_out_clusters (start, end);
continue; continue;
} }
else if (!tindex)
buffer->unsafe_to_break (buffer->idx, buffer->idx + 2); /* Mark unsafe between LV and T. */
} }
if (has_glyph) if (has_glyph)