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Fix bug #9254 with crash and cursor positioning under longlines-mode.

Browse source 
src/xdisp.c (set_cursor_from_row): Fix cursor positioning when a
 display property strides EOL and includes a newline, as in
 longlines-mode.
 src/bidi.c (bidi_unshelve_cache): Don't reset the cache if JUST_FREE
 is non-zero, even if the data buffer is NULL.  Fixes a crash in
 vertical-motion with longlines-mode.
This commit is contained in:
Eli Zaretskii 2011-08-06 13:59:36 +03:00
parent d747b53feb
commit d141015034
3 changed files with 46 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

10
src/ChangeLog
View file

@ -1,3 +1,13 @@
2011-08-06 Eli Zaretskii <eliz@gnu.org>
* xdisp.c (set_cursor_from_row): Fix cursor positioning when a
display property strides EOL and includes a newline, as in
longlines-mode. (Bug#9254)
* bidi.c (bidi_unshelve_cache): Don't reset the cache if JUST_FREE
is non-zero, even if the data buffer is NULL. Fixes a crash in
vertical-motion with longlines-mode. (Bug#9254)
2011-08-05 Eli Zaretskii <eliz@gnu.org>
* bidi.c <bidi_cache_total_alloc>: Now static.

17
src/bidi.c
View file

@ -666,7 +666,11 @@ bidi_shelve_cache (void)
return databuf;
}
/* Restore the cache state from a copy stashed away by bidi_shelve_cache. */
/* Restore the cache state from a copy stashed away by
bidi_shelve_cache, and free the buffer used to stash that copy.
JUST_FREE non-zero means free the buffer, but don't restore the
cache; used when the corresponding iterator is discarded instead of
being restored. */
void
bidi_unshelve_cache (void *databuf, int just_free)
{
@ -674,10 +678,13 @@ bidi_unshelve_cache (void *databuf, int just_free)
if (!p)
{
/* A NULL pointer means an empty cache. */
bidi_cache_start = 0;
bidi_cache_sp = 0;
bidi_cache_reset ();
if (!just_free)
{
/* A NULL pointer means an empty cache. */
bidi_cache_start = 0;
bidi_cache_sp = 0;
bidi_cache_reset ();
}
}
else
{

28
src/xdisp.c
View file

@ -13285,6 +13285,9 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
/* Last buffer position covered by an overlay string with an integer
`cursor' property. */
EMACS_INT bpos_covered = 0;
/* Non-zero means the display string on which to display the cursor
comes from a text property, not from an overlay. */
int string_from_text_prop = 0;
/* Skip over glyphs not having an object at the start and the end of
the row. These are special glyphs like truncation marks on
@ -13603,9 +13606,14 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
{
Lisp_Object str;
EMACS_INT tem;
/* If the display property covers the newline, we
need to search for it one position farther. */
EMACS_INT lim = pos_after
+ (pos_after == MATRIX_ROW_END_CHARPOS (row) + delta);
string_from_text_prop = 0;
str = glyph->object;
tem = string_buffer_position_lim (str, pos, pos_after, 0);
tem = string_buffer_position_lim (str, pos, lim, 0);
if (tem == 0 /* from overlay */
|| pos <= tem)
{
@ -13629,7 +13637,10 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
EMACS_INT strpos = glyph->charpos;
if (tem)
cursor = glyph;
{
cursor = glyph;
string_from_text_prop = 1;
}
for ( ;
(row->reversed_p ? glyph > stop : glyph < stop)
&& EQ (glyph->object, str);
@ -13730,8 +13741,17 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
/* previous candidate is a glyph from a string that has
a non-nil `cursor' property */
|| (STRINGP (g1->object)
&& !NILP (Fget_char_property (make_number (g1->charpos),
Qcursor, g1->object)))))
&& (!NILP (Fget_char_property (make_number (g1->charpos),
Qcursor, g1->object))
/* pevious candidate is from the same display
string as this one, and the display string
came from a text property */
|| (EQ (g1->object, glyph->object)
&& string_from_text_prop)
/* this candidate is from newline and its
position is not an exact match */
|| (INTEGERP (glyph->object)
&& glyph->charpos != pt_old)))))
return 0;
/* If this candidate gives an exact match, use that. */
if (!(BUFFERP (glyph->object) && glyph->charpos == pt_old)