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patch 8.2.4644: redrawing too often when 'relativenumber' is set

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Problem:    Redrawing too often when 'relativenumber' is set.
Solution:   Only redraw when the cursor line changed. (Lewis Russell,
            closes #10040)
This commit is contained in:
Lewis Russell
2022-03-29 11:38:17 +01:00
committed by Bram Moolenaar
parent 24565cf27b
commit 1624639ec8
4 changed files with 10 additions and 4 deletions
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7
src/drawscreen.c
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@@ -2507,11 +2507,11 @@ win_update(win_T *wp)
}
else
{
if (wp->w_p_rnu)
if (wp->w_p_rnu && wp->w_last_cursor_lnum_rnu != wp->w_cursor.lnum)
{
#ifdef FEAT_FOLDING
// 'relativenumber' set: The text doesn't need to be drawn, but
// the number column nearly always does.
// 'relativenumber' set and the cursor moved vertically: The
// text doesn't need to be drawn, but the number column does.
fold_count = foldedCount(wp, lnum, &win_foldinfo);
if (fold_count != 0)
fold_line(wp, fold_count, &win_foldinfo, lnum, row);
@@ -2553,6 +2553,7 @@ win_update(win_T *wp)
// update w_last_cursorline.
wp->w_last_cursorline = wp->w_p_cul ? wp->w_cursor.lnum : 0;
#endif
wp->w_last_cursor_lnum_rnu = wp->w_p_rnu ? wp->w_cursor.lnum : 0;
#ifdef FEAT_VTP
// Rewrite the character at the end of the screen line.