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vim-patch:9.1.0083: Redrawing can be improved when deleting lines with 'number'

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Problem:  Redrawing can be improved when inserting/deleting lines with 'number'.
Solution: Only redraw the number column of lines below changed lines.
          Add a test as this wasn't previously tested.
          (zeertzjq)

closes: vim/vim#13985

ae07ebc04b
This commit is contained in:
zeertzjq
2024-02-08 19:10:27 +08:00
parent 1c2b9e8dd8
commit da3facb7ee
4 changed files with 340 additions and 263 deletions
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15
src/nvim/drawscreen.c
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@@ -1643,12 +1643,6 @@ static void win_update(win_T *wp)
top_end = 1;
}
}
// When line numbers are displayed need to redraw all lines below
// inserted/deleted lines.
if (mod_top != 0 && buf->b_mod_xlines != 0 && wp->w_p_nu) {
mod_bot = MAXLNUM;
}
}
wp->w_redraw_top = 0; // reset for next time
@@ -2326,9 +2320,12 @@ static void win_update(win_T *wp)
idx++;
lnum += foldinfo.fi_lines + 1;
} else {
if (wp->w_p_rnu && wp->w_last_cursor_lnum_rnu != wp->w_cursor.lnum) {
// 'relativenumber' set and cursor moved vertically: The
// text doesn't need to be drawn, but the number column does.
// If:
// - '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)
|| (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);
win_line(wp, lnum, srow, wp->w_grid.rows, wp->w_lines[idx].wl_size, &spv, info);