[metacity] window: Allow resizing of attached modal dialogs

[Alberts Muktupāvels <muktupavels src gnome org>]

commit c0a297236868ff70a3f1cc9504dab1b410cd25f1
Author: Florian Müllner <fmuellner gnome org>
Date:   Mon Mar 21 18:23:53 2011 +0100

    window: Allow resizing of attached modal dialogs
    
    Currently attached modal dialogs are not resizable, but we don't
    communicate this to GTK+, so the dialog may end up with resize
    grips anyway. As a fix, allow resizing, but account for the dialog
    being centered to its parent.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=643597

 src/core/window.c |   16 ++++++++++------
 1 files changed, 10 insertions(+), 6 deletions(-)
---
diff --git a/src/core/window.c b/src/core/window.c
index ca30d17..185e9e3 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -6647,12 +6647,7 @@ recalc_window_features (MetaWindow *window)
 
   if (window->type == META_WINDOW_MODAL_DIALOG && meta_prefs_get_attach_modal_dialogs ())
     {
-      MetaWindow *parent = meta_window_get_transient_for (window);
-      if (parent)
-        {
-          window->has_resize_func = FALSE;
-          window->border_only = TRUE;
-        }
+      window->border_only = TRUE;
     }
 
   if (window->type == META_WINDOW_DESKTOP ||
@@ -7550,6 +7545,15 @@ update_resize (MetaWindow *window,
   dx = x - window->display->grab_anchor_root_x;
   dy = y - window->display->grab_anchor_root_y;
 
+  /* Attached modal dialogs are special in that horizontal
+   * size changes apply to both sides, so that the dialog
+   * remains centered to the parent.
+   */
+  if (window->type == META_WINDOW_MODAL_DIALOG &&
+      meta_prefs_get_attach_modal_dialogs () &&
+      meta_window_get_transient_for (window) != NULL)
+    dx *= 2;
+
   new_w = window->display->grab_anchor_window_pos.width;
   new_h = window->display->grab_anchor_window_pos.height;