Patch 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)
Files: src/gui_w48.c
*** ../vim-7.3.758/src/gui_w48.c 2012-11-20 16:53:34.000000000 +0100
--- src/gui_w48.c 2012-12-12 17:10:21.000000000 +0100
***************
*** 2452,2458 ****
TCITEM tie;
int nr = 0;
int curtabidx = 0;
- RECT rc;
#ifdef FEAT_MBYTE
static int use_unicode = FALSE;
int uu;
--- 2452,2457 ----
***************
*** 2479,2491 ****
tie.mask = TCIF_TEXT;
tie.iImage = -1;
/* 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))
{
/* Add the tab */
tie.pszText = "-Empty-";
--- 2478,2493 ----
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 (nr >= TabCtrl_GetItemCount(s_tabhwnd))
{
/* Add the tab */
tie.pszText = "-Empty-";
***************
*** 2519,2529 ****
}
/* Remove any old labels. */
! while (TabCtrl_GetItemRect(s_tabhwnd, nr, &rc))
TabCtrl_DeleteItem(s_tabhwnd, nr);
if (TabCtrl_GetCurSel(s_tabhwnd) != curtabidx)
TabCtrl_SetCurSel(s_tabhwnd, curtabidx);
}
/*
--- 2521,2534 ----
}
/* Remove any old labels. */
! 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);
}
/*
*** ../vim-7.3.758/src/version.c 2012-12-12 16:43:52.000000000 +0100
--- src/version.c 2012-12-12 17:10:46.000000000 +0100
***************
*** 727,728 ****
--- 727,730 ----
{ /* Add new patch number below this line */
+ /**/
+ 759,
/**/
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