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patch 9.1.0100: Redrawing can be improved with undo and 'spell'

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Problem:  When undoing with 'spell', redrawWinline() is called after
          changed_lines(), while later win_update() sets redraw type to
          UPD_NOT_VALID, even though w_redraw_top and w_redraw_bot are
          still valid.
Solution: Only set redraw type to UPD_NOT_VALID when inserting/deleting
          lines after parts of window has pending redraw, i.e., when
          changed_lines() is called after redrawWinline().
          (zeertzjq)

closes: #14019

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
This commit is contained in:
zeertzjq
2024-02-12 20:28:01 +01:00
committed by Christian Brabandt
parent a0010a186d
commit f2d90a3511
4 changed files with 11 additions and 11 deletions
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10
src/drawscreen.c
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@@ -1408,7 +1408,7 @@ fold_line(
* - if wp->w_buffer->b_mod_set set, update lines between
* b_mod_top and b_mod_bot.
* - if wp->w_redraw_top non-zero, redraw lines between
* wp->w_redraw_top and wp->w_redr_bot.
* wp->w_redraw_top and wp->w_redraw_bot.
* - continue redrawing when syntax status is invalid.
* 4. if scrolled up, update lines at the bottom.
* This results in three areas that may need updating:
@@ -1567,14 +1567,6 @@ win_update(win_T *wp)
else
#endif
if (buf->b_mod_set && buf->b_mod_xlines != 0 && wp->w_redraw_top != 0)
{
// When there are both inserted/deleted lines and specific lines to be
// redrawn, w_redraw_top and w_redraw_bot may be invalid, just redraw
// everything (only happens when redrawing is off for while).
type = UPD_NOT_VALID;
}
else
{
// Set mod_top to the first line that needs displaying because of
// changes. Set mod_bot to the first line after the changes.