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Fix bidi paragraph direction when inserting text at newline

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* src/insdel.c (invalidate_buffer_caches): Invalidate the bidi
paragraph cache when inserting immediately after a newline.
(Bug#26083)
This commit is contained in:
Eli Zaretskii 2017-03-13 18:15:09 +02:00
parent 7a50abee22
commit f591765e2b
1 changed files with 7 additions and 4 deletions
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11
src/insdel.c
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@ -2001,18 +2001,21 @@ invalidate_buffer_caches (struct buffer *buf, ptrdiff_t start, ptrdiff_t end)
see below). */
if (buf->bidi_paragraph_cache)
{
if (start != end
&& start > BUF_BEG (buf))
if (start > BUF_BEG (buf))
{
/* If we are deleting or replacing characters, we could
create a paragraph start, because all of the characters
from START to the beginning of START's line are
whitespace. Therefore, we must extend the region to be
invalidated up to the newline before START. */
invalidated up to the newline before START. Similarly,
if we are inserting characters immediately after a
newline, we could create a paragraph start if the
inserted characters start with a newline. */
ptrdiff_t line_beg = start;
ptrdiff_t start_byte = buf_charpos_to_bytepos (buf, start);
int prev_char = BUF_FETCH_BYTE (buf, start_byte - 1);
if (BUF_FETCH_BYTE (buf, start_byte - 1) != '\n')
if ((start == end) == (prev_char == '\n'))
{
struct buffer *old = current_buffer;