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patch 9.0.2022: getmousepos() returns wrong index for TAB char

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Problem:  When clicking in the middle of a TAB, getmousepos() returns
          the column of the next char instead of the TAB.
Solution: Break out of the loop when the vcol to find is inside current
          char. Fix invalid memory access when calling virtcol2col() on
          an empty line.

closes: #13321

Signed-off-by: Christian Brabandt <cb@256bit.org>
Co-authored-by: zeertzjq <zeertzjq@outlook.com>
This commit is contained in:
zeertzjq
2023-10-14 11:32:28 +02:00
committed by Christian Brabandt
parent cd6ee69358
commit b583eda703
6 changed files with 62 additions and 7 deletions
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7
src/mouse.c
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@@ -3201,7 +3201,7 @@ mouse_find_win(int *rowp, int *colp, mouse_find_T popup UNUSED)
|| defined(FEAT_EVAL) || defined(PROTO)
/*
* Convert a virtual (screen) column to a character column.
* The first column is one.
* The first column is zero.
*/
int
vcol2col(win_T *wp, linenr_T lnum, int vcol)
@@ -3214,7 +3214,10 @@ vcol2col(win_T *wp, linenr_T lnum, int vcol)
init_chartabsize_arg(&cts, wp, lnum, 0, line, line);
while (cts.cts_vcol < vcol && *cts.cts_ptr != NUL)
{
cts.cts_vcol += win_lbr_chartabsize(&cts, NULL);
int size = win_lbr_chartabsize(&cts, NULL);
if (cts.cts_vcol + size > vcol)
break;
cts.cts_vcol += size;
MB_PTR_ADV(cts.cts_ptr);
}
clear_chartabsize_arg(&cts);