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Fix last change

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* src/composite.c (composition_reseat_it): Fix of the commentary,
and a minor change of the last fix.
This commit is contained in:
Eli Zaretskii 2020-07-25 19:25:02 +03:00
parent efdd4632c9
commit 4b3085a7fe
1 changed files with 13 additions and 2 deletions
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15
src/composite.c
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@ -1171,7 +1171,9 @@ composition_compute_stop_pos (struct composition_it *cmp_it, ptrdiff_t charpos,
character to check, and CHARPOS and BYTEPOS are indices in the
string. In that case, FACE must not be NULL. BIDI_LEVEL is the bidi
embedding level of the current paragraph, and is used to calculate the
direction argument to pass to the font shaper.
direction argument to pass to the font shaper; value of -1 means the
caller doesn't know the embedding level (used by callers which didn't
invoke the display routines that perform bidi-display-reordering).
If the character is composed, setup members of CMP_IT (id, nglyphs,
from, to, reversed_p), and return true. Otherwise, update
@ -1256,7 +1258,16 @@ composition_reseat_it (struct composition_it *cmp_it, ptrdiff_t charpos,
else
bpos = CHAR_TO_BYTE (cpos);
}
if ((bidi_level & 1) == 0)
/* The bidi_level < 0 case below strictly speaking should
never happen, since we get here when bidi scan direction
is backward in the buffer, which can only happen if the
display routines were called to perform the bidi
reordering. But it doesn't harm to test for that, and
avoid someon raising their brows and thinking it's a
subtle bug... */
if (bidi_level < 0)
direction = Qnil;
else if ((bidi_level & 1) == 0)
direction = QL2R;
else
direction = QR2L;