From: Po Lu <luangruo@yahoo.com>
Date: Wed, 3 Nov 2021 12:00:57 +0000 (+0800)
Subject: Prefer XMoveResizeWindow to XMoveWindow for resizing xwidgets
X-Git-Tag: emacs-29.0.90~3671^2~149
X-Git-Url: http://git.eshelyaron.com/gitweb/?a=commitdiff_plain;h=1e16fc26342213e4aabaa1a491a23ccea5894bf0;p=emacs.git

Prefer XMoveResizeWindow to XMoveWindow for resizing xwidgets

* src/xwidget.c (x_draw_xwidget_glyph_string): Prefer
XMoveResizeWindow to avoid extra expose events.
---

diff --git a/src/xwidget.c b/src/xwidget.c
index b25f95c7faf..d4196bced1a 100644
--- a/src/xwidget.c
+++ b/src/xwidget.c
@@ -868,7 +868,11 @@ x_draw_xwidget_glyph_string (struct glyph_string *s)
   if (moved)
     {
 #ifdef USE_GTK
-      XMoveWindow (xv->dpy, xv->wdesc, x + clip_left, y + clip_top);
+      XMoveResizeWindow (xv->dpy, xv->wdesc, x + clip_left, y + clip_top,
+			 clip_right - clip_left, clip_bottom - clip_top);
+      XFlush (xv->dpy);
+      cairo_xlib_surface_set_size (xv->cr_surface, clip_right - clip_left,
+				   clip_bottom - clip_top);
 #elif defined NS_IMPL_COCOA
       nsxwidget_move_view (xv, x + clip_left, y + clip_top);
 #endif
@@ -884,7 +888,7 @@ x_draw_xwidget_glyph_string (struct glyph_string *s)
       || xv->clip_top != clip_top || xv->clip_left != clip_left)
     {
 #ifdef USE_GTK
-      if (!wdesc_was_none)
+      if (!wdesc_was_none && !moved)
 	{
 	  XResizeWindow (xv->dpy, xv->wdesc, clip_right - clip_left,
 			 clip_bottom - clip_top);