Add a switch to disable autofullscreen'ing maximized windows without decorations

src/core/constraints.c

@@ -27,6 +27,7 @@
 #include "constraints.h"
 #include "workspace-private.h"
 #include "place.h"
+#include "prefs.h"
 
 #include <stdlib.h>
 #include <math.h>
@@ -424,7 +425,8 @@ setup_constraint_info (ConstraintInfo      *info,
   /* Workaround braindead legacy apps that don't know how to
    * fullscreen themselves properly.
    */
-  if (meta_rectangle_equal (new, &monitor_info->rect) &&
+  if (meta_prefs_get_force_fullscreen() &&
+      meta_rectangle_equal (new, &monitor_info->rect) &&
       window->has_fullscreen_func &&
       !window->fullscreen)
     {

src/core/main.c

@@ -228,6 +228,7 @@ typedef struct
   gboolean sync;
   gboolean composite;
   gboolean no_composite;
+  gboolean no_force_fullscreen;
   gboolean no_tab_popup;
   gchar *introspect;
 } MetaArguments;
@@ -306,6 +307,12 @@ meta_parse_options (int *argc, char ***argv,
       N_("Turn compositing off"),
       NULL
     },
+    {
+      "no-force-fullscreen", 0, COMPOSITE_OPTS_FLAGS, G_OPTION_ARG_NONE,
+      &my_args.no_force_fullscreen,
+      N_("Don't make fullscreen windows that are maximized and have no decorations"),
+      NULL
+    },
     {
       "mutter-plugins", 0, 0, G_OPTION_ARG_STRING,
       &my_args.mutter_plugins,
@@ -677,6 +684,9 @@ main (int argc, char **argv)
   if (meta_args.composite || meta_args.no_composite)
     meta_prefs_set_compositing_manager (meta_args.composite);
 
+  if (meta_args.no_force_fullscreen)
+    meta_prefs_set_force_fullscreen (FALSE);
+
   if (meta_args.no_tab_popup)
     {
       meta_prefs_override_no_tab_popup (TRUE);

src/core/prefs.c

@@ -100,6 +100,7 @@ static char *cursor_theme = NULL;
 static int   cursor_size = 24;
 static gboolean compositing_manager = FALSE;
 static gboolean resize_with_right_button = FALSE;
+static gboolean force_fullscreen = TRUE;
 
 static MetaVisualBellType visual_bell_type = META_VISUAL_BELL_FULLSCREEN_FLASH;
 static MetaButtonLayout button_layout;
@@ -1800,6 +1801,9 @@ meta_preference_to_string (MetaPreference pref)
     case META_PREF_RESIZE_WITH_RIGHT_BUTTON:
       return "RESIZE_WITH_RIGHT_BUTTON";
 
+    case META_PREF_FORCE_FULLSCREEN:
+      return "FORCE_FULLSCREEN";
+
     case META_PREF_CLUTTER_PLUGINS:
       return "CLUTTER_PLUGINS";
 
@@ -2792,6 +2796,12 @@ meta_prefs_get_mouse_button_menu (void)
   return resize_with_right_button ? 2: 3;
 }
 
+gboolean
+meta_prefs_get_force_fullscreen (void)
+{
+  return force_fullscreen;
+}
+
 void
 meta_prefs_set_compositing_manager (gboolean whether)
 {
@@ -2957,3 +2967,10 @@ init_button_layout(void)
 };
 
 #endif
+
+void
+meta_prefs_set_force_fullscreen (gboolean whether)
+{
+  force_fullscreen = whether;
+}
+

src/include/prefs.h

@@ -59,9 +59,10 @@ typedef enum
   META_PREF_CURSOR_SIZE,
   META_PREF_COMPOSITING_MANAGER,
   META_PREF_RESIZE_WITH_RIGHT_BUTTON,
+  META_PREF_FORCE_FULLSCREEN,
   META_PREF_CLUTTER_PLUGINS,
   META_PREF_LIVE_HIDDEN_WINDOWS,
-  META_PREF_NO_TAB_POPUP,
+  META_PREF_NO_TAB_POPUP
 } MetaPreference;
 
 typedef void (* MetaPrefsChangedFunc) (MetaPreference pref,
@@ -115,6 +116,7 @@ void        meta_prefs_change_workspace_name (int         i,
 const char* meta_prefs_get_cursor_theme      (void);
 int         meta_prefs_get_cursor_size       (void);
 gboolean    meta_prefs_get_compositing_manager (void);
+gboolean    meta_prefs_get_force_fullscreen  (void);
 
 /**
  * Sets whether the compositor is turned on.
@@ -123,6 +125,8 @@ gboolean    meta_prefs_get_compositing_manager (void);
  */
 void meta_prefs_set_compositing_manager (gboolean whether);
 
+void meta_prefs_set_force_fullscreen (gboolean whether);
+
 GSList * meta_prefs_get_clutter_plugins (void);
 
 /**