[nautilus-actions] Monitor mandatory preferences

[Pierre Wieser <pwieser src gnome org>]

commit 2ec27ab0896f157876fd35013fe696390a663851
Author: Pierre Wieser <pwieser trychlos org>
Date:   Thu Mar 25 01:06:11 2010 +0100

    Monitor mandatory preferences

 ChangeLog                          |   11 +++++++++++
 TODO                               |    3 +++
 src/core/na-ipivot-consumer.c      |   25 +++++++++++++++++++++++++
 src/core/na-ipivot-consumer.h      |    9 +++++++++
 src/core/na-pivot.c                |   34 ++++++++++++++++++++++++++++++++++
 src/nact/nact-main-window.c        |    1 +
 src/plugin-menu/nautilus-actions.c |    1 +
 7 files changed, 84 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 1fb1fcc..0cb61b9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,5 +1,16 @@
 2009-03-24 Pierre Wieser <pwieser trychlos org>
 
+	* src/core/na-ipivot-consumer.c
+	(na_ipivot_consumer_notify_of_mandatory_prefs_changed) : New function.
+	(on_mandatory_prefs_changed): New interface API.
+
+	* src/core/na-pivot.c (monitor_runtime_preferences):
+	Monitor the mandatory preferences set by the admin.
+
+	* src/nact/nact-main-window.c (ipivot_consumer_iface_init):
+	* src/plugin-menu/nautilus-actions.c (ipivot_consumer_iface_init):
+	For now, only declare NULL implementations.
+
 	* src/nact/nact-preferences-editor.c (on_base_runtime_init_dialog):
 	* src/nact/nact-sort-buttons.c (nact_sort_buttons_runtime_init):
 	Forbid the modification of order mode is level zero is not writable.
diff --git a/TODO b/TODO
index 733def2..7ba2d94 100644
--- a/TODO
+++ b/TODO
@@ -137,3 +137,6 @@
             properties/
             conditions/
             command/
+
+- enhancement.ui: implement on_mandatory_prefs_changed NAIPivotConsumer interface
+  to dynamically enable/disable order-mode buttons when admin changes them.
diff --git a/src/core/na-ipivot-consumer.c b/src/core/na-ipivot-consumer.c
index 241094e..761c889 100644
--- a/src/core/na-ipivot-consumer.c
+++ b/src/core/na-ipivot-consumer.c
@@ -186,6 +186,31 @@ void na_ipivot_consumer_notify_of_items_changed( NAIPivotConsumer *instance )
 }
 
 /**
+ * na_ipivot_consumer_notify_of_mandatory_prefs_changed:
+ * @instance: the #NAIPivotConsumer instance to be notified of the modifications.
+ *
+ * Notifies the consumers that a mandatory 'locked' preference has been changed.
+ */
+void na_ipivot_consumer_notify_of_mandatory_prefs_changed( NAIPivotConsumer *instance )
+{
+	static const gchar *thisfn = "na_ipivot_consumer_notify_of_mandatory_prefs_changed";
+
+	g_debug( "%s: instance=%p", thisfn, ( void * ) instance );
+
+	g_return_if_fail( NA_IS_IPIVOT_CONSUMER( instance ));
+
+	if( st_initialized && !st_finalized ){
+
+		if( is_notify_allowed( instance )){
+
+			if( NA_IPIVOT_CONSUMER_GET_INTERFACE( instance )->on_mandatory_prefs_changed ){
+				NA_IPIVOT_CONSUMER_GET_INTERFACE( instance )->on_mandatory_prefs_changed( instance );
+			}
+		}
+	}
+}
+
+/**
  * na_ipivot_consumer_notify_of_create_root_menu_changed:
  * @instance: the #NAIPivotConsumer instance to be notified of the end
  * of the modifications.
diff --git a/src/core/na-ipivot-consumer.h b/src/core/na-ipivot-consumer.h
index 4b0cb3d..be5216e 100644
--- a/src/core/na-ipivot-consumer.h
+++ b/src/core/na-ipivot-consumer.h
@@ -103,6 +103,14 @@ typedef struct {
 	 * is changed.
 	 */
 	void ( *on_display_order_changed )   ( NAIPivotConsumer *instance, gint order_mode );
+
+	/**
+	 * on_mandatory_prefs_changed:
+	 * @instance: the #NAIPivotConsumer instance which implements this interface.
+	 *
+	 * This function is triggered each time a mandatory 'locked' preference is changed.
+	 */
+	void ( *on_mandatory_prefs_changed ) ( NAIPivotConsumer *instance );
 }
 	NAIPivotConsumerInterface;
 
@@ -111,6 +119,7 @@ GType na_ipivot_consumer_get_type( void );
 void  na_ipivot_consumer_delay_notify( NAIPivotConsumer *instance );
 
 void  na_ipivot_consumer_notify_of_items_changed           ( NAIPivotConsumer *instance );
+void  na_ipivot_consumer_notify_of_mandatory_prefs_changed ( NAIPivotConsumer *instance );
 void  na_ipivot_consumer_notify_of_create_root_menu_changed( NAIPivotConsumer *instance, gboolean enabled );
 void  na_ipivot_consumer_notify_of_display_about_changed   ( NAIPivotConsumer *instance, gboolean enabled );
 void  na_ipivot_consumer_notify_of_display_order_changed   ( NAIPivotConsumer *instance, gint order_mode );
diff --git a/src/core/na-pivot.c b/src/core/na-pivot.c
index ad0c409..7414001 100644
--- a/src/core/na-pivot.c
+++ b/src/core/na-pivot.c
@@ -116,6 +116,7 @@ static gulong        time_val_diff( const GTimeVal *recent, const GTimeVal *old
 
 /* NAGConf runtime preferences management */
 static void          monitor_runtime_preferences( NAPivot *pivot );
+static void          on_mandatory_prefs_changed( GConfClient *client, guint cnxn_id, GConfEntry *entry, NAPivot *pivot );
 static void          on_preferences_change( GConfClient *client, guint cnxn_id, GConfEntry *entry, NAPivot *pivot );
 static void          display_order_changed( NAPivot *pivot );
 static void          create_root_menu_changed( NAPivot *pivot );
@@ -874,6 +875,7 @@ monitor_runtime_preferences( NAPivot *pivot )
 {
 	static const gchar *thisfn = "na_pivot_monitor_runtime_preferences";
 	GList *list = NULL;
+	gchar *path;
 
 	g_debug( "%s: pivot=%p", thisfn, ( void * ) pivot );
 	g_return_if_fail( NA_IS_PIVOT( pivot ));
@@ -885,10 +887,42 @@ monitor_runtime_preferences( NAPivot *pivot )
 					( GConfClientNotifyFunc ) on_preferences_change,
 					pivot ));
 
+	path = gconf_concat_dir_and_key( IPREFS_GCONF_BASEDIR, "mandatory" );
+	list = g_list_prepend( list,
+			na_gconf_monitor_new(
+					path,
+					( GConfClientNotifyFunc ) on_mandatory_prefs_changed,
+					pivot ));
+	g_free( path );
+
 	pivot->private->monitors = list;
 }
 
 static void
+on_mandatory_prefs_changed( GConfClient *client, guint cnxn_id, GConfEntry *entry, NAPivot *pivot )
+{
+	const gchar *key;
+	gchar *key_entry;
+	GList *ic;
+
+	g_return_if_fail( NA_IS_PIVOT( pivot ));
+
+	if( !pivot->private->dispose_has_run ){
+
+		key = gconf_entry_get_key( entry );
+		key_entry = g_path_get_basename( key );
+
+		if( !strcmp( key_entry, "locked" )){
+			for( ic = pivot->private->consumers ; ic ; ic = ic->next ){
+				na_ipivot_consumer_notify_of_mandatory_prefs_changed( NA_IPIVOT_CONSUMER( ic->data ));
+			}
+		}
+
+		g_free( key_entry );
+	}
+}
+
+static void
 on_preferences_change( GConfClient *client, guint cnxn_id, GConfEntry *entry, NAPivot *pivot )
 {
 	/*static const gchar *thisfn = "na_pivot_on_preferences_change";*/
diff --git a/src/nact/nact-main-window.c b/src/nact/nact-main-window.c
index 05c1d7c..435fa59 100644
--- a/src/nact/nact-main-window.c
+++ b/src/nact/nact-main-window.c
@@ -550,6 +550,7 @@ ipivot_consumer_iface_init( NAIPivotConsumerInterface *iface )
 	iface->on_create_root_menu_changed = NULL;
 	iface->on_display_about_changed = NULL;
 	iface->on_display_order_changed = ipivot_consumer_on_display_order_changed;
+	iface->on_mandatory_prefs_changed = NULL;
 }
 
 static void
diff --git a/src/plugin-menu/nautilus-actions.c b/src/plugin-menu/nautilus-actions.c
index 21e5b2c..9f4fb4d 100644
--- a/src/plugin-menu/nautilus-actions.c
+++ b/src/plugin-menu/nautilus-actions.c
@@ -306,6 +306,7 @@ ipivot_consumer_iface_init( NAIPivotConsumerInterface *iface )
 	iface->on_create_root_menu_changed = ipivot_consumer_create_root_menu_changed;
 	iface->on_display_about_changed = ipivot_consumer_display_about_changed;
 	iface->on_display_order_changed = ipivot_consumer_display_order_changed;
+	iface->on_mandatory_prefs_changed = NULL;
 }
 
 static void