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Code Issues Releases Activity

Fix cursor movement in R2L text within L2R paragraphs.

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src/xdisp.c (set_cursor_from_row): Consider candidate row a win if its
 glyph represents a newline and point is on that newline.  Fixes cursor
 positioning on the newline at EOL of R2L text within L2R
 paragraph, and vice versa.
 (try_cursor_movement): Check continued rows, in addition to
 continuation rows.  Fixes unwarranted scroll when point enters a
 continued line of R2L text within an L2R paragraph, or vice versa.
 (cursor_row_p): Consider the case of point being equal to
 MATRIX_ROW_END_CHARPOS.  Prevents cursor being stuck when moving
 from the end of a short line to the beginning of a continued line
 of R2L text within L2R paragraph.
 (RECORD_MAX_MIN_POS): For max_pos, use IT_CHARPOS even for
 composed characters.
This commit is contained in:
Eli Zaretskii 2011-08-24 18:51:56 +03:00
parent 5980d4c6db
commit 8610fe8b84
2 changed files with 28 additions and 6 deletions
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13
src/ChangeLog
View File

@ -2,6 +2,19 @@
* xdisp.c (Fcurrent_bidi_paragraph_direction): For unibyte
buffers, return left-to-right.
(set_cursor_from_row): Consider candidate row a win if its glyph
represents a newline and point is on that newline. Fixes cursor
positioning on the newline at EOL of R2L text within L2R
paragraph, and vice versa.
(try_cursor_movement): Check continued rows, in addition to
continuation rows. Fixes unwarranted scroll when point enters a
continued line of R2L text within an L2R paragraph, or vice versa.
(cursor_row_p): Consider the case of point being equal to
MATRIX_ROW_END_CHARPOS. Prevents cursor being stuck when moving
from the end of a short line to the beginning of a continued line
of R2L text within L2R paragraph.
(RECORD_MAX_MIN_POS): For max_pos, use IT_CHARPOS even for
composed characters.
* bidi.c (bidi_check_type): Use xassert.
(bidi_cache_iterator_state): Update the disp_pos and disp_prop_p

21
src/xdisp.c
View File

@ -13796,7 +13796,14 @@ set_cursor_from_row (struct window *w, struct glyph_row *row,
&& glyph->charpos != pt_old)))))
return 0;
/* If this candidate gives an exact match, use that. */
if (!(BUFFERP (glyph->object) && glyph->charpos == pt_old)
if (!((BUFFERP (glyph->object) && glyph->charpos == pt_old)
/* If this candidate is a glyph created for the
terminating newline of a line, and point is on that
newline, it wins because it's an exact match. */
|| (!row->continued_p
&& INTEGERP (glyph->object)
&& glyph->charpos == 0
&& pt_old == MATRIX_ROW_END_CHARPOS (row) - 1))
/* Otherwise, keep the candidate that comes from a row
spanning less buffer positions. This may win when one or
both candidate positions are on glyphs that came from
@ -14578,7 +14585,8 @@ try_cursor_movement (Lisp_Object window, struct text_pos startp, int *scroll_ste
}
++row;
}
while ((MATRIX_ROW_CONTINUATION_LINE_P (row)
while (((MATRIX_ROW_CONTINUATION_LINE_P (row)
|| row->continued_p)
&& MATRIX_ROW_BOTTOM_Y (row) <= last_y)
|| (MATRIX_ROW_START_CHARPOS (row) == PT
&& MATRIX_ROW_BOTTOM_Y (row) < last_y));
@ -18009,7 +18017,8 @@ cursor_row_p (struct glyph_row *row)
{
int result = 1;
if (PT == CHARPOS (row->end.pos))
if (PT == CHARPOS (row->end.pos)
|| PT == MATRIX_ROW_END_CHARPOS (row))
{
/* Suppose the row ends on a string.
Unless the row is continued, that means it ends on a newline
@ -18404,10 +18413,10 @@ display_line (struct it *it)
min_pos = current_pos; \
min_bpos = current_bpos; \
} \
if (current_pos > max_pos) \
if (IT_CHARPOS (*it) > max_pos) \
{ \
max_pos = current_pos; \
max_bpos = current_bpos; \
max_pos = IT_CHARPOS (*it); \
max_bpos = IT_BYTEPOS (*it); \
} \
} \
while (0)