MooEditWindowCheckActionFunc stuff

moo/mooedit/mooeditwindow.c

@@ -39,6 +39,16 @@
 #define LANG_ACTION_ID "LanguageMenu"
 #define STOP_ACTION_ID "StopJob"
 
+typedef struct {
+    char *property;
+    MooEditWindowCheckActionFunc func;
+    gpointer data;
+    GDestroyNotify notify;
+} ActionCheck;
+
+static GHashTable *action_checks; /* char* -> GSList* */
+static GSList *windows;
+
 struct _MooEditWindowPrivate {
     MooEditor *editor;
 
@@ -72,6 +82,14 @@ static GtkTargetEntry dest_targets[] = {
 };
 
 
+static ActionCheck *action_check_new            (const char         *action_prop,
+                                                 MooEditWindowCheckActionFunc func,
+                                                 gpointer            data,
+                                                 GDestroyNotify      notify);
+static void     action_check_free               (ActionCheck        *check);
+static void     action_checks_init              (void);
+static void     moo_edit_window_check_actions   (MooEditWindow      *window);
+
 GObject        *moo_edit_window_constructor     (GType               type,
                                                  guint               n_props,
                                                  GObjectConstructParam *props);
@@ -218,12 +236,15 @@ static guint signals[NUM_SIGNALS];
         g_param_spec_boolean (name, name, name, FALSE, G_PARAM_READABLE))
 
 
-static void moo_edit_window_class_init (MooEditWindowClass *klass)
+static void
+moo_edit_window_class_init (MooEditWindowClass *klass)
 {
     GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
     GtkObjectClass *gtkobject_class = GTK_OBJECT_CLASS (klass);
     MooWindowClass *window_class = MOO_WINDOW_CLASS (klass);
 
+    action_checks_init ();
+
     gobject_class->constructor = moo_edit_window_constructor;
     gobject_class->finalize = moo_edit_window_finalize;
     gobject_class->set_property = moo_edit_window_set_property;
@@ -634,6 +655,8 @@ moo_edit_window_init (MooEditWindow *window)
                   NULL);
 
     window->priv->use_fullname = TRUE;
+
+    windows = g_slist_prepend (windows, window);
 }
 
 
@@ -665,6 +688,8 @@ moo_edit_window_destroy (GtkObject *object)
         g_slist_free (list);
     }
 
+    windows = g_slist_remove (windows, window);
+
     GTK_OBJECT_CLASS(moo_edit_window_parent_class)->destroy (object);
 }
 
@@ -1090,6 +1115,7 @@ static void     notebook_switch_page    (G_GNUC_UNUSED MooNotebook *notebook,
                                          MooEditWindow *window)
 {
     edit_changed (window, get_nth_tab (window, page_num));
+    moo_edit_window_check_actions (window);
     g_object_notify (G_OBJECT (window), "active-doc");
 }
 
@@ -2249,7 +2275,200 @@ edit_lang_changed (MooEditWindow      *window,
                    MooEdit            *doc)
 {
     if (doc == ACTIVE_DOC (window))
+    {
         update_lang_menu (window);
+        moo_edit_window_check_actions (window);
+    }
+}
+
+
+/*****************************************************************************/
+/* Action properties checks
+ */
+
+static void
+moo_edit_window_check_action (MooEditWindow *window,
+                              MooEdit       *doc,
+                              MooAction     *action,
+                              ActionCheck   *check)
+{
+    gpointer klass;
+    GParamSpec *pspec;
+    GValue value;
+
+    klass = G_OBJECT_GET_CLASS (action);
+    pspec = g_object_class_find_property (klass, check->property);
+    g_return_if_fail (pspec != NULL);
+
+    value.g_type = 0;
+    g_value_init (&value, pspec->value_type);
+
+    check->func (action, doc, pspec, &value, check->data);
+    g_object_set_property (G_OBJECT (action), check->property, &value);
+
+    g_value_unset (&value);
+}
+
+
+static void
+window_check_actions (const char    *action_id,
+                      GSList        *checks,
+                      MooEditWindow *window)
+{
+    MooAction *action;
+    MooEdit *doc;
+
+    action = moo_window_get_action_by_id (MOO_WINDOW (window), action_id);
+
+    if (!action)
+        return;
+
+    doc = ACTIVE_DOC (window);
+
+    while (checks)
+    {
+        moo_edit_window_check_action (window, doc, action, checks->data);
+        checks = checks->next;
+    }
+}
+
+
+static void
+moo_edit_window_check_actions (MooEditWindow *window)
+{
+    g_message ("checking actions");
+    g_hash_table_foreach (action_checks,
+                          (GHFunc) window_check_actions,
+                          window);
+}
+
+
+static void
+check_action (const char  *action_id,
+              ActionCheck *check)
+{
+    GSList *l;
+
+    for (l = windows; l != NULL; l = l->next)
+    {
+        MooEditWindow *window = l->data;
+        MooEdit *doc = ACTIVE_DOC (window);
+        MooAction *action = moo_window_get_action_by_id (MOO_WINDOW (window), action_id);
+        if (action)
+            moo_edit_window_check_action (window, doc, action, check);
+    }
+}
+
+
+static int
+check_and_prop_cmp (ActionCheck *check,
+                    const char  *prop)
+{
+    return strcmp (check->property, prop);
+}
+
+void
+moo_edit_window_add_action_check (const char     *action_id,
+                                  const char     *action_prop,
+                                  MooEditWindowCheckActionFunc func,
+                                  gpointer        data,
+                                  GDestroyNotify  notify)
+{
+    ActionCheck *check;
+    GSList *list;
+
+    g_return_if_fail (action_id != NULL);
+    g_return_if_fail (action_prop != NULL);
+    g_return_if_fail (func != NULL);
+
+    action_checks_init ();
+
+    list = g_hash_table_lookup (action_checks, action_id);
+
+    if (list)
+    {
+        GSList *old = g_slist_find_custom (list, action_prop,
+                                           (GCompareFunc) check_and_prop_cmp);
+
+        if (old)
+        {
+            action_check_free (old->data);
+            list = g_slist_delete_link (list, old);
+        }
+    }
+
+    check = action_check_new (action_prop, func, data, notify);
+    list = g_slist_prepend (list, check);
+    g_hash_table_insert (action_checks, g_strdup (action_id), list);
+
+    check_action (action_id, check);
+}
+
+
+void
+moo_edit_window_remove_action_check (const char *action_id,
+                                     const char *action_prop)
+{
+    GSList *list;
+
+    g_return_if_fail (action_id != NULL);
+    g_return_if_fail (action_prop != NULL);
+
+    action_checks_init ();
+
+    list = g_hash_table_lookup (action_checks, action_id);
+
+    if (list)
+    {
+        GSList *old = g_slist_find_custom (list, action_prop,
+                                           (GCompareFunc) check_and_prop_cmp);
+
+        if (old)
+        {
+            action_check_free (old->data);
+            list = g_slist_delete_link (list, old);
+        }
+
+        if (!list)
+            g_hash_table_remove (action_checks, action_id);
+    }
+}
+
+
+static ActionCheck *
+action_check_new (const char     *action_prop,
+                  MooEditWindowCheckActionFunc func,
+                  gpointer        data,
+                  GDestroyNotify  notify)
+{
+    ActionCheck *check = g_new0 (ActionCheck, 1);
+    check->property = g_strdup (action_prop);
+    check->func = func;
+    check->data = data;
+    check->notify = notify;
+    return check;
+}
+
+
+static void
+action_check_free (ActionCheck *check)
+{
+    if (check)
+    {
+        if (check->notify)
+            check->notify (check->data);
+        g_free (check->property);
+        g_free (check);
+    }
+}
+
+
+static void
+action_checks_init (void)
+{
+    if (!action_checks)
+        action_checks =
+                g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
 }
 
 

moo/mooedit/mooeditwindow.h

@@ -57,6 +57,20 @@ struct _MooEditWindowClass
 
 GType        moo_edit_window_get_type               (void) G_GNUC_CONST;
 
+typedef void (*MooEditWindowCheckActionFunc)        (MooAction      *action,
+                                                     MooEdit        *doc,
+                                                     GParamSpec     *pspec,
+                                                     GValue         *prop_value,
+                                                     gpointer        data);
+
+void         moo_edit_window_add_action_check       (const char     *action_id,
+                                                     const char     *action_prop,
+                                                     MooEditWindowCheckActionFunc func,
+                                                     gpointer        data,
+                                                     GDestroyNotify  notify);
+void         moo_edit_window_remove_action_check    (const char     *action_id,
+                                                     const char     *action_prop);
+
 MooEdit     *moo_edit_window_get_active_doc         (MooEditWindow  *window);
 void         moo_edit_window_set_active_doc         (MooEditWindow  *window,
                                                      MooEdit        *edit);