Implements support for _NET_WM_ALLOWED_ACTIONS. Fixes #84282.

2002-08-01  Mark McLoughlin  <mark@skynet.ie>

        Implements support for _NET_WM_ALLOWED_ACTIONS.
        Fixes #84282.

        * src/display.[ch]: (meta_display_open): add
        _NET_WM_ALLOWED_ACTIONS atoms.

        * src/screen.c: (set_supported_hint): set them
        as being supported.

        * src/window.c:
        (set_allowed_actions_hint): impl setting
        _NET_WM_ALLOWED_ACTIONS.
        (recalc_window_features): use it here, but only
        if things have changed.

ChangeLog

@@ -1,3 +1,20 @@
+2002-08-01  Mark McLoughlin  <mark@skynet.ie>
+
+	Implements support for _NET_WM_ALLOWED_ACTIONS.
+	Fixes #84282.
+
+	* src/display.[ch]: (meta_display_open): add
+	_NET_WM_ALLOWED_ACTIONS atoms.
+
+	* src/screen.c: (set_supported_hint): set them
+	as being supported.
+
+	* src/window.c:
+	(set_allowed_actions_hint): impl setting
+	_NET_WM_ALLOWED_ACTIONS.
+	(recalc_window_features): use it here, but only
+	if things have changed.
+
 2002-08-01  Christophe Fergeau  <teuf@users.sourceforge.net>
 
 	* src/metacity-dialog.c: focus the "Close" button by default on 

src/display.c

@@ -227,7 +227,16 @@ meta_display_open (const char *name)
     "TIMESTAMP",
     "VERSION",
     "ATOM_PAIR",
-    "_NET_DESKTOP_NAMES"
+    "_NET_DESKTOP_NAMES",
+    "_NET_WM_ALLOWED_ACTIONS",
+    "_NET_WM_ACTION_MOVE",
+    "_NET_WM_ACTION_RESIZE",
+    "_NET_WM_ACTION_SHADE",
+    "_NET_WM_ACTION_STICK",
+    "_NET_WM_ACTION_MAXIMIZE_HORZ",
+    "_NET_WM_ACTION_MAXIMIZE_VERT",
+    "_NET_WM_ACTION_CHANGE_DESKTOP",
+    "_NET_WM_ACTION_CLOSE",
   };
   Atom atoms[G_N_ELEMENTS(atom_names)];
   
@@ -359,6 +368,15 @@ meta_display_open (const char *name)
   display->atom_version = atoms[63];
   display->atom_atom_pair = atoms[64];
   display->atom_net_desktop_names = atoms[65];
+  display->atom_net_wm_allowed_actions = atoms[66];
+  display->atom_net_wm_action_move = atoms[67];
+  display->atom_net_wm_action_resize = atoms[68];
+  display->atom_net_wm_action_shade = atoms[69];
+  display->atom_net_wm_action_stick = atoms[70];
+  display->atom_net_wm_action_maximize_horz = atoms[71];
+  display->atom_net_wm_action_maximize_vert = atoms[72];
+  display->atom_net_wm_action_change_desktop = atoms[73];
+  display->atom_net_wm_action_close = atoms[74];
   
   /* Offscreen unmapped window used for _NET_SUPPORTING_WM_CHECK,
    * created in screen_new

src/display.h

@@ -138,6 +138,15 @@ struct _MetaDisplay
   Atom atom_version;
   Atom atom_atom_pair;
   Atom atom_net_desktop_names;
+  Atom atom_net_wm_allowed_actions;
+  Atom atom_net_wm_action_move;
+  Atom atom_net_wm_action_resize;
+  Atom atom_net_wm_action_shade;
+  Atom atom_net_wm_action_stick;
+  Atom atom_net_wm_action_maximize_horz;
+  Atom atom_net_wm_action_maximize_vert;
+  Atom atom_net_wm_action_change_desktop;
+  Atom atom_net_wm_action_close;
   
   /* This is the actual window from focus events,
    * not the one we last set

src/screen.c

@@ -81,7 +81,7 @@ set_wm_check_hint (MetaScreen *screen)
 static int
 set_supported_hint (MetaScreen *screen)
 {
-#define N_SUPPORTED 33
+#define N_SUPPORTED 42
 #define N_WIN_SUPPORTED 1
   Atom atoms[N_SUPPORTED];
   
@@ -118,6 +118,15 @@ set_supported_hint (MetaScreen *screen)
   atoms[30] = screen->display->atom_net_show_desktop;
   atoms[31] = screen->display->atom_net_desktop_layout;
   atoms[32] = screen->display->atom_net_desktop_names;
+  atoms[33] = screen->display->atom_net_wm_allowed_actions;
+  atoms[34] = screen->display->atom_net_wm_action_move;
+  atoms[35] = screen->display->atom_net_wm_action_resize;
+  atoms[36] = screen->display->atom_net_wm_action_shade;
+  atoms[37] = screen->display->atom_net_wm_action_stick;
+  atoms[38] = screen->display->atom_net_wm_action_maximize_horz;
+  atoms[39] = screen->display->atom_net_wm_action_maximize_vert;
+  atoms[40] = screen->display->atom_net_wm_action_change_desktop;
+  atoms[41] = screen->display->atom_net_wm_action_close;
   
   XChangeProperty (screen->display->xdisplay, screen->xroot,
                    screen->display->atom_net_supported,

src/window.c

@@ -4998,9 +4998,83 @@ recalc_window_type (MetaWindow *window)
     }
 }
 
+static int
+set_allowed_actions_hint (MetaWindow *window)
+{
+#define MAX_N_ACTIONS 8
+  unsigned long data[MAX_N_ACTIONS];
+  int i;
+
+
+
+  i = 0;
+  if (window->has_close_func)
+    {
+      data[i] = window->display->atom_net_wm_action_close;
+      ++i;
+    }
+  if (window->has_minimize_func)
+    {
+      data[i] = window->display->atom_net_wm_action_maximize_horz;
+      ++i;
+      data[i] = window->display->atom_net_wm_action_maximize_vert;
+      ++i;
+    }
+  if (window->has_move_func)
+    {
+      data[i] = window->display->atom_net_wm_action_move;
+      ++i;
+    }
+  if (window->has_resize_func)
+    {
+      data[i] = window->display->atom_net_wm_action_resize;
+      ++i;
+    }
+  if (window->has_shade_func)
+    {
+      data[i] = window->display->atom_net_wm_action_shade;
+      ++i;
+    }
+  if (!window->always_sticky)
+    {
+      data[i] = window->display->atom_net_wm_action_stick;
+      ++i;
+    }
+
+  /* We always allow this */
+  data[i] = window->display->atom_net_wm_action_change_desktop;
+  ++i;
+
+  g_assert (i <= MAX_N_ACTIONS);
+
+  meta_verbose ("Setting _NET_WM_ALLOWED_ACTIONS with %d atoms\n", i);
+  
+  meta_error_trap_push (window->display);
+  XChangeProperty (window->display->xdisplay, window->xwindow,
+                   window->display->atom_net_wm_allowed_actions,
+                   XA_ATOM,
+                   32, PropModeReplace, (guchar*) data, i);
+  return meta_error_trap_pop (window->display);
+#undef MAX_N_ACTIONS
+}
+
 static void
 recalc_window_features (MetaWindow *window)
 {
+  gboolean old_has_close_func;
+  gboolean old_has_minimize_func;
+  gboolean old_has_move_func;
+  gboolean old_has_resize_func;
+  gboolean old_has_shade_func;
+  gboolean old_always_sticky;
+
+  old_has_close_func = window->has_close_func;
+  old_has_minimize_func = window->has_minimize_func;
+  old_has_move_func = window->has_move_func;
+  old_has_resize_func = window->has_resize_func;
+  old_has_shade_func = window->has_shade_func;
+  old_always_sticky = window->always_sticky;
+
   /* Use MWM hints initially */
   window->decorated = window->mwm_decorated;
   window->border_only = window->mwm_border_only;
@@ -5108,6 +5182,20 @@ recalc_window_features (MetaWindow *window)
       break;
     }
 
+  /* FIXME:
+   * Lame workaround for recalc_window_features
+   * being used overzealously. The fix is to
+   * only recalc_window_features when something
+   * has actually changed.
+   */
+  if (old_has_close_func != window->has_close_func       ||
+      old_has_minimize_func != window->has_minimize_func ||
+      old_has_move_func != window->has_move_func         ||
+      old_has_resize_func != window->has_resize_func     ||
+      old_has_shade_func != window->has_shade_func       ||
+      old_always_sticky != window->always_sticky)
+    set_allowed_actions_hint (window);
+    
   /* FIXME perhaps should ensure if we don't have a shade func,
    * we aren't shaded, etc.
    */