emacs-27 08486f4: Speed up 'resize-mode' child frames a little

[Dmitry Gutov]

branch: emacs-27
commit 08486f4cae8e209cd70bd13534beff336faffd9e
Author: Dmitry Gutov <address@hidden>
Commit: Dmitry Gutov <address@hidden>

    Speed up 'resize-mode' child frames a little
    
    * src/gtkutil.c (xg_frame_set_char_size): Skip resizing if the
    target dimensions are unchanged for child frames with
    'resize-mode' resize policy as well.
---
 src/gtkutil.c | 24 ++++++++++++++++--------
 1 file changed, 16 insertions(+), 8 deletions(-)

diff --git a/src/gtkutil.c b/src/gtkutil.c
index e374bdb..466cb42 100644
--- a/src/gtkutil.c
+++ b/src/gtkutil.c
@@ -954,6 +954,7 @@ xg_frame_set_char_size (struct frame *f, int width, int 
height)
     = pixelheight + FRAME_TOOLBAR_HEIGHT (f) + FRAME_MENUBAR_HEIGHT (f);
   int totalwidth = pixelwidth + FRAME_TOOLBAR_WIDTH (f);
   bool was_visible = false;
+  bool hide_child_frame;
 
   if (FRAME_PIXEL_HEIGHT (f) == 0)
     return;
@@ -996,26 +997,33 @@ xg_frame_set_char_size (struct frame *f, int width, int 
height)
       gtk_window_resize (GTK_WINDOW (FRAME_GTK_OUTER_WIDGET (f)),
                         totalwidth, gheight);
     }
-  else if (FRAME_PARENT_FRAME (f) && FRAME_VISIBLE_P (f)
-          && EQ (x_gtk_resize_child_frames, Qhide))
+  else if (FRAME_PARENT_FRAME (f) && FRAME_VISIBLE_P (f))
     {
       was_visible = true;
+      hide_child_frame = EQ (x_gtk_resize_child_frames, Qhide);
 
       if (totalwidth != gwidth || totalheight != gheight)
        {
          frame_size_history_add
            (f, Qxg_frame_set_char_size_4, width, height,
             list2i (totalwidth, totalheight));
-         block_input ();
-         gtk_widget_hide (FRAME_GTK_OUTER_WIDGET (f));
-         unblock_input ();
+
+          if (hide_child_frame)
+            {
+              block_input ();
+              gtk_widget_hide (FRAME_GTK_OUTER_WIDGET (f));
+              unblock_input ();
+            }
 
          gtk_window_resize (GTK_WINDOW (FRAME_GTK_OUTER_WIDGET (f)),
                             totalwidth, totalheight);
 
-         block_input ();
-         gtk_widget_show_all (FRAME_GTK_OUTER_WIDGET (f));
-         unblock_input ();
+          if (hide_child_frame)
+            {
+              block_input ();
+              gtk_widget_show_all (FRAME_GTK_OUTER_WIDGET (f));
+              unblock_input ();
+            }
 
          fullscreen = Qnil;
        }