[nautilus/wip/oholy/compress-dialog-x11] compress-dialog-controller: Really fix the cropped popover on X11

[Ondrej Holy <oholy src gnome org>]

commit 747b7ab81bcbadbcf98011f36fee75cfbf369626
Author: Ondrej Holy <oholy redhat com>
Date:   Tue Aug 9 15:45:15 2022 +0200

    compress-dialog-controller: Really fix the cropped popover on X11
    
    The commit 441124c tried to fix the cropped popover on X11 with twice the
    height window. This is still not enough with some translations, or when the
    larger font is used. Let's resize the window using the preferred popover
    size to avoid those issues.
    
    Fixes: https://gitlab.gnome.org/GNOME/nautilus/-/issues/2018

 src/nautilus-compress-dialog-controller.c | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)
---
diff --git a/src/nautilus-compress-dialog-controller.c b/src/nautilus-compress-dialog-controller.c
index 6c5b6964c..be31bf1fe 100644
--- a/src/nautilus-compress-dialog-controller.c
+++ b/src/nautilus-compress-dialog-controller.c
@@ -400,13 +400,20 @@ popover_on_show (GtkWidget *widget,
     }
 
 #ifdef GDK_WINDOWING_X11
+    /* Workaround for https://gitlab.gnome.org/GNOME/nautilus/-/issues/2018 */
     if (GDK_IS_X11_DISPLAY (gdk_display_get_default ()))
     {
-        int w, h;
+        GtkWidget *vbox;
+        int w, h, y;
 
-        /* Workaround for https://gitlab.gnome.org/GNOME/nautilus/-/issues/2018 */
-        gtk_window_get_default_size (GTK_WINDOW (self->compress_dialog), &w, &h);
-        gtk_window_resize (GTK_WINDOW (self->compress_dialog), w, h * 2);
+        /* The vbox child is used instead of the dialog itself to get size
+           without the title bar, client side decorations etc. */
+        vbox = gtk_bin_get_child (GTK_BIN (self->compress_dialog));
+        gtk_widget_translate_coordinates (widget, vbox, 0, gtk_widget_get_margin_top (vbox), NULL, &y);
+
+        gtk_widget_get_preferred_width (widget, NULL, &w);
+        gtk_widget_get_preferred_height (widget, NULL, &h);
+        gtk_window_resize (GTK_WINDOW (self->compress_dialog), w, y + h);
     }
 #endif
 }