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vim-patch:9.1.0889: Possible unnecessary redraw after adding/deleting lines (#31356)

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Problem:  Possible unnecessary redraw after adding/deleting lines.
Solution: Check b_mod_set before using b_mod_xlines to avoid using stale
          b_mod_xlines value (zeertzjq).

closes: vim/vim#16124

9f25a3a237
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zeertzjq 2024-11-26 22:55:05 +08:00 committed by GitHub
parent 3d707e6f14
commit e8450ef236
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1 changed files with 3 additions and 2 deletions
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5
src/nvim/drawscreen.c
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@ -2072,7 +2072,7 @@ static void win_update(win_T *wp)
// match in fixed position might need redraw
// if lines were inserted or deleted
|| (wp->w_match_head != NULL
&& buf->b_mod_xlines != 0)))))
&& buf->b_mod_set && buf->b_mod_xlines != 0)))))
|| lnum == wp->w_cursorline
|| lnum == wp->w_last_cursorline) {
if (lnum == mod_top) {
@ -2291,7 +2291,8 @@ static void win_update(win_T *wp)
// - 'number' is set and below inserted/deleted lines, or
// - 'relativenumber' is set and cursor moved vertically,
// the text doesn't need to be redrawn, but the number column does.
if ((wp->w_p_nu && mod_top != 0 && lnum >= mod_bot && buf->b_mod_xlines != 0)
if ((wp->w_p_nu && mod_top != 0 && lnum >= mod_bot
&& buf->b_mod_set && buf->b_mod_xlines != 0)
|| (wp->w_p_rnu && wp->w_last_cursor_lnum_rnu != wp->w_cursor.lnum)) {
foldinfo_T info = wp->w_p_cul && lnum == wp->w_cursor.lnum
? cursorline_fi : fold_info(wp, lnum);