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patch 9.1.0406: Divide by zero with getmousepos() and 'smoothscroll'

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Problem:  Divide by zero with getmousepos() and 'smoothscroll'.
Solution: Don't compute skip_lines when width1 is zero.
          (zeertzjq)

closes: #14747

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
zeertzjq
2024-05-11 11:23:37 +02:00
committed by Christian Brabandt
parent 1c5728e0c4
commit 031a745608
4 changed files with 87 additions and 10 deletions
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22
src/mouse.c
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@@ -3029,16 +3029,22 @@ mouse_comp_pos(
if (win->w_skipcol > 0 && lnum == win->w_topline)
{
// Adjust for 'smoothscroll' clipping the top screen lines.
// A similar formula is used in curs_columns().
int width1 = win->w_width - win_col_off(win);
int skip_lines = 0;
if (win->w_skipcol > width1)
skip_lines = (win->w_skipcol - width1)
if (width1 > 0)
{
int skip_lines = 0;
// Adjust for 'smoothscroll' clipping the top screen lines.
// A similar formula is used in curs_columns().
if (win->w_skipcol > width1)
skip_lines = (win->w_skipcol - width1)
/ (width1 + win_col_off2(win)) + 1;
else if (win->w_skipcol > 0)
skip_lines = 1;
count -= skip_lines;
else if (win->w_skipcol > 0)
skip_lines = 1;
count -= skip_lines;
}
}
if (count > row)