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patch 8.1.0767: when deleting lines at the bottom signs are misplaced

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Problem:    When deleting lines at the bottom signs are misplaced.
Solution:   Properly update the line number of signs at the end of a buffer
            after a delete/undo operation. (Yegappan Lakshmanan, closes #3798)
This commit is contained in:
Bram Moolenaar
2019-01-17 17:36:45 +01:00
parent 88c86eb751
commit c771bf9016
3 changed files with 57 additions and 7 deletions
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20
src/sign.c
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@@ -660,18 +660,28 @@ sign_mark_adjust(
long amount_after)
{
signlist_T *sign; // a sign in a b_signlist
linenr_T new_lnum;
FOR_ALL_SIGNS_IN_BUF(curbuf, sign)
{
// Ignore changes to lines after the sign
if (sign->lnum < line1)
continue;
new_lnum = sign->lnum;
if (sign->lnum >= line1 && sign->lnum <= line2)
{
if (amount == MAXLNUM)
sign->lnum = line1;
else
sign->lnum += amount;
if (amount != MAXLNUM)
new_lnum += amount;
}
else if (sign->lnum > line2)
sign->lnum += amount_after;
// Lines inserted or deleted before the sign
new_lnum += amount_after;
// If the new sign line number is past the last line in the buffer,
// then don't adjust the line number. Otherwise, it will always be past
// the last line and will not be visible.
if (new_lnum <= curbuf->b_ml.ml_line_count)
sign->lnum = new_lnum;
}
}