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Fix bidi-aware cursor motion inside indentation.

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src/xdisp.c (Fcurrent_bidi_paragraph_direction): Fix search for previous
 non-empty line.  Fixes confusing cursor motion with arrow keys at
 the beginning of a line that starts with whitespace.
This commit is contained in:
Eli Zaretskii 2011-09-20 20:42:16 +03:00
parent 8c203dbf33
commit fd317ddfc9
2 changed files with 20 additions and 16 deletions
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3
src/ChangeLog
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@ -5,6 +5,9 @@
(find_row_edges): If the row ends in a newline from a display
string, increment its MATRIX_ROW_END_CHARPOS by one. (Bug#9549)
Handle the case of a display string with multiple newlines.
(Fcurrent_bidi_paragraph_direction): Fix search for previous
non-empty line. Fixes confusing cursor motion with arrow keys at
the beginning of a line that starts with whitespace.
2011-09-19 Lars Magne Ingebrigtsen <larsi@gnus.org>

33
src/xdisp.c
View file

@ -19205,6 +19205,7 @@ See also `bidi-paragraph-direction'. */)
EMACS_INT pos = BUF_PT (buf);
EMACS_INT bytepos = BUF_PT_BYTE (buf);
int c;
void *itb_data = bidi_shelve_cache ();
set_buffer_temp (buf);
/* bidi_paragraph_init finds the base direction of the paragraph
@ -19217,27 +19218,27 @@ See also `bidi-paragraph-direction'. */)
pos--;
bytepos = CHAR_TO_BYTE (pos);
}
while ((c = FETCH_BYTE (bytepos)) == '\n'
|| c == ' ' || c == '\t' || c == '\f')
if (fast_looking_at (build_string ("[\f\t ]*\n"),
pos, bytepos, ZV, ZV_BYTE, Qnil) > 0)
{
if (bytepos <= BEGV_BYTE)
break;
bytepos--;
pos--;
while ((c = FETCH_BYTE (bytepos)) == '\n'
|| c == ' ' || c == '\t' || c == '\f')
{
if (bytepos <= BEGV_BYTE)
break;
bytepos--;
pos--;
}
while (!CHAR_HEAD_P (FETCH_BYTE (bytepos)))
bytepos--;
}
while (!CHAR_HEAD_P (FETCH_BYTE (bytepos)))
bytepos--;
itb.charpos = pos;
itb.bytepos = bytepos;
itb.nchars = -1;
bidi_init_it (pos, bytepos, FRAME_WINDOW_P (SELECTED_FRAME ()), &itb);
itb.string.s = NULL;
itb.string.lstring = Qnil;
itb.frame_window_p = FRAME_WINDOW_P (SELECTED_FRAME ()); /* guesswork */
itb.first_elt = 1;
itb.separator_limit = -1;
itb.paragraph_dir = NEUTRAL_DIR;
itb.string.bufpos = 0;
itb.string.unibyte = 0;
bidi_paragraph_init (NEUTRAL_DIR, &itb, 1);
bidi_unshelve_cache (itb_data, 0);
set_buffer_temp (old);
switch (itb.paragraph_dir)
{