updated for version 7.3.759
Problem: MS-Windows: Updating the tabline is slow when there are many tabs.
Solution: Disable redrawing while performing the update. (Arseny Kapoulkine)
diff --git a/src/gui_w48.c b/src/gui_w48.c
index 61c53a7..a70fb25 100644
--- a/src/gui_w48.c
+++ b/src/gui_w48.c
@@ -2452,7 +2452,6 @@
TCITEM tie;
int nr = 0;
int curtabidx = 0;
- RECT rc;
#ifdef FEAT_MBYTE
static int use_unicode = FALSE;
int uu;
@@ -2479,13 +2478,16 @@
tie.mask = TCIF_TEXT;
tie.iImage = -1;
+ /* Disable redraw for tab updates to eliminate O(N^2) draws. */
+ SendMessage(s_tabhwnd, WM_SETREDRAW, (WPARAM)FALSE, 0);
+
/* Add a label for each tab page. They all contain the same text area. */
for (tp = first_tabpage; tp != NULL; tp = tp->tp_next, ++nr)
{
if (tp == curtab)
curtabidx = nr;
- if (!TabCtrl_GetItemRect(s_tabhwnd, nr, &rc))
+ if (nr >= TabCtrl_GetItemCount(s_tabhwnd))
{
/* Add the tab */
tie.pszText = "-Empty-";
@@ -2519,11 +2521,14 @@
}
/* Remove any old labels. */
- while (TabCtrl_GetItemRect(s_tabhwnd, nr, &rc))
+ while (nr < TabCtrl_GetItemCount(s_tabhwnd))
TabCtrl_DeleteItem(s_tabhwnd, nr);
if (TabCtrl_GetCurSel(s_tabhwnd) != curtabidx)
TabCtrl_SetCurSel(s_tabhwnd, curtabidx);
+
+ /* Re-enable redraw. This should trigger a repaint. */
+ SendMessage(s_tabhwnd, WM_SETREDRAW, (WPARAM)TRUE, 0);
}
/*
diff --git a/src/version.c b/src/version.c
index 5a0f815..e743fae 100644
--- a/src/version.c
+++ b/src/version.c
@@ -726,6 +726,8 @@
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
+ 759,
+/**/
758,
/**/
757,