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vim-patch:9.1.1388: Scrolling one line too far with 'nosmoothscroll' page scrolling (#34023)

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Problem:  One-off error in "count" to make "w_skipcol" zero with
          'nosmoothscroll' page scrolling when last virtual line
          in a buffer line is exactly the entire window width.
          (Hirohito Higashi)
Solution: Properly compute the smallest integer value necessary
          to make "w_skipcol" zero (Luuk van Baal)

c6c72d165c
(cherry picked from commit f87b6230f1)
This commit is contained in:
luukvbaal
2025-05-15 10:01:34 +02:00
committed by github-actions[bot]
parent d50f71d2f1
commit 27abf5c81b
2 changed files with 20 additions and 3 deletions
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6
src/nvim/move.c
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@@ -2427,10 +2427,10 @@ static bool scroll_with_sms(Direction dir, int count, int *curscount)
int width1 = curwin->w_width_inner - win_col_off(curwin);
int width2 = width1 + win_col_off2(curwin);
count = 1 + (curwin->w_skipcol - width1) / width2;
count = 1 + (curwin->w_skipcol - width1 - 1) / width2;
if (fixdir == FORWARD) {
count = 2 + (linetabsize_eol(curwin, curwin->w_topline)
- curwin->w_skipcol - width1) / width2;
count = 1 + (linetabsize_eol(curwin, curwin->w_topline)
- curwin->w_skipcol - width1 + width2 - 1) / width2;
}
scroll_redraw(fixdir == FORWARD, count);
*curscount += count * (fixdir == dir ? 1 : -1);