spice-widget: add an API to get guest display size

Signed-off-by: Haochen Tong <i@hexchain.org>
Acked-by: Frediano Ziglio <fziglio@redhat.com>

src/map-file

@@ -33,6 +33,7 @@ spice_display_channel_gl_draw_done;
 spice_display_get_gl_scanout;
 spice_display_get_grab_keys;
 spice_display_get_pixbuf;
+spice_display_get_preferred_size;
 spice_display_get_primary;
 spice_display_get_type;
 spice_display_gl_draw_done;

src/spice-glib-sym-file

@@ -29,6 +29,7 @@ spice_display_channel_get_primary
 spice_display_channel_get_type
 spice_display_channel_gl_draw_done
 spice_display_get_gl_scanout
+spice_display_get_preferred_size
 spice_display_get_primary
 spice_display_gl_draw_done
 spice_file_transfer_task_cancel

src/spice-widget.c

@@ -3520,3 +3520,22 @@ GdkPixbuf *spice_display_get_pixbuf(SpiceDisplay *display)
 
     return pixbuf;
 }
+
+/**
+ * spice_display_get_preferred_size:
+ * @display: a #SpiceDisplay
+ * @width: the preferred width of the display, in physical pixel
+ * @height: the preferred height of the display, in physical pixel
+ *
+ * Get the preferred width and height of the display.
+ **/
+void spice_display_get_preferred_size(SpiceDisplay *display, int *width, int *height)
+{
+    SpiceDisplayPrivate *d = display->priv;
+
+    if (width)
+        *width = d->area.width;
+
+    if (height)
+        *height = d->area.height;
+}
\ No newline at end of file

src/spice-widget.h

@@ -79,6 +79,7 @@ SpiceGrabSequence *spice_display_get_grab_keys(SpiceDisplay *display);
 void spice_display_send_keys(SpiceDisplay *display, const guint *keyvals,
                              int nkeyvals, SpiceDisplayKeyEvent kind);
 GdkPixbuf *spice_display_get_pixbuf(SpiceDisplay *display);
+void spice_display_get_preferred_size(SpiceDisplay *display, int *width, int *height);
 
 G_END_DECLS
 

tools/spicy.c

@@ -587,8 +587,7 @@ static void menu_cb_resize_to(GtkAction *action G_GNUC_UNUSED,
     spin_x = gtk_spin_button_new_with_range(0, G_MAXINT, 10);
     spin_y = gtk_spin_button_new_with_range(0, G_MAXINT, 10);
 
-    gtk_widget_get_preferred_width(win->spice, NULL, &width);
-    gtk_widget_get_preferred_height(win->spice, NULL, &height);
+    spice_display_get_preferred_size(SPICE_DISPLAY(win->spice), &width, &height);
 
     gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin_width), width);
     gtk_spin_button_set_value(GTK_SPIN_BUTTON(spin_height), height);