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bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse
From: |
Vincent Lefevre |
Subject: |
bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning |
Date: |
Sat, 31 Oct 2020 02:13:50 +0100 |
User-agent: |
Mutt/1.14.5+76 (bb407ec3) vl-127292 (2020-06-24) |
On 2020-10-31 01:46:17 +0100, Vincent Lefevre wrote:
> So I assume that the bug occurs somewhere in try_cursor_movement.
In try_cursor_movement, one has:
if (MATRIX_ROW_BOTTOM_Y (row) > last_y
|| PT > MATRIX_ROW_END_CHARPOS (row)
/* Line is completely visible last line in window
and PT is to be set in the next line. */
|| (MATRIX_ROW_BOTTOM_Y (row) == last_y
&& PT == MATRIX_ROW_END_CHARPOS (row)
&& !row->ends_at_zv_p
&& !MATRIX_ROW_ENDS_IN_MIDDLE_OF_CHAR_P (row)))
With the culprit font, MATRIX_ROW_BOTTOM_Y (row) > last_y becomes 1
when the cursor reaches the last line. With a working font, the value
is still 0.
More precisely, with size 13, MATRIX_ROW_BOTTOM_Y (row) and last_y are:
27 442
40 442
53 442
...
417 442
430 442
443 442 <-- line 34 (last visible line)
and with size 14:
28 476
42 476
56 476
...
448 476
462 476
476 476 <-- line 34 (last visible line)
The issue with size 13 is that MATRIX_ROW_BOTTOM_Y (row) is 13*n+1
instead of 13*n.
That's all for today.
--
Vincent Lefèvre <vincent@vinc17.net> - Web: <https://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <https://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, (continued)
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Eli Zaretskii, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Eli Zaretskii, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Eli Zaretskii, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/30
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning,
Vincent Lefevre <=
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Eli Zaretskii, 2020/10/31
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/31
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/31
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Vincent Lefevre, 2020/10/31
- bug#44284: 27.1; with some Unicode font, scrolling upward with the mouse wheel actually scrolls downward when the cursor needs repositioning, Eli Zaretskii, 2020/10/30