actions: Add "Save Window Positions" menu

This adds the "Save Window Positions Now" option from Preferences to the
Windows menu.

app/actions/windows-actions.c

@@ -112,6 +112,12 @@ static const GimpActionEntry windows_actions[] =
 
   { "windows-tab-position",        NULL, NC_("windows-action",
                                              "_Tabs Position")   },
+
+  { "windows-save-positions", NULL,
+    NC_("windows-action", "Save _Window Positions"), NULL, { NULL },
+    NC_("windows-action", "Save the current session layout"),
+    windows_save_positions_cmd_callback,
+    NULL },
 };
 
 static const GimpToggleActionEntry windows_toggle_actions[] =
@@ -248,6 +254,8 @@ windows_actions_update (GimpActionGroup *group,
 
 #define SET_ACTIVE(action,condition) \
         gimp_action_group_set_action_active (group, action, (condition) != 0)
+#define SET_SENSITIVE(action,condition) \
+        gimp_action_group_set_action_sensitive (group, action, (condition) != 0, NULL)
 
   SET_ACTIVE ("windows-use-single-window-mode", config->single_window_mode);
   SET_ACTIVE ("windows-hide-docks", config->hide_docks);
@@ -278,7 +286,12 @@ windows_actions_update (GimpActionGroup *group,
   gimp_action_group_set_action_sensitive (group, "windows-show-tabs", config->single_window_mode,
                                           _("Single-window mode disabled"));
 
+#ifdef GDK_WINDOWING_WAYLAND
+  SET_SENSITIVE ("windows-save-positions", FALSE);
+#endif
+
 #undef SET_ACTIVE
+#undef SET_SENSITIVE
 }
 
 gchar *

app/actions/windows-commands.c

@@ -42,6 +42,8 @@
 
 #include "dialogs/dialogs.h"
 
+#include "gui/session.h"
+
 #include "actions.h"
 #include "dialogs-actions.h"
 #include "windows-commands.h"
@@ -222,3 +224,15 @@ windows_open_recent_cmd_callback (GimpAction *action,
 
   g_object_unref (info);
 }
+
+void
+windows_save_positions_cmd_callback (GimpAction *action,
+                                     GVariant   *value,
+                                     gpointer    data)
+{
+  Gimp *gimp;
+
+  return_if_no_gimp (gimp, data);
+
+  session_save (gimp, TRUE);
+}

app/actions/windows-commands.h

@@ -48,6 +48,9 @@ void  windows_show_dock_cmd_callback              (GimpAction *action,
 void  windows_open_recent_cmd_callback            (GimpAction *action,
                                                    GVariant   *value,
                                                    gpointer    data);
+void  windows_save_positions_cmd_callback         (GimpAction *action,
+                                                   GVariant   *value,
+                                                   gpointer    data);
 
 
 #endif /* __WINDOWS_COMMANDS_H__ */

menus/image-menu.ui.in.in

@@ -885,6 +885,7 @@
           <item><attribute name="action">app.windows-tabs-position-left</attribute></item>
           <item><attribute name="action">app.windows-tabs-position-right</attribute></item>
         </submenu>
+        <item><attribute name="action">app.windows-save-positions</attribute></item>
         <item><attribute name="action">app.windows-use-single-window-mode</attribute></item>
       </section>
     </submenu>