[gtk+] appchooser: add a GCancellable to the search operation

[Cosimo Cecchi <cosimoc src gnome org>]

commit 569b5ffd5bf687cbb37e17367f1d7ac7657eee2e
Author: Cosimo Cecchi <cosimoc gnome org>
Date:   Mon Oct 3 11:47:09 2011 -0400

    appchooser: add a GCancellable to the search operation
    
    So that we can cancel it when the dialog is destroyed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=651818

 gtk/gtkappchooserdialog.c   |   15 +++++++++++++--
 gtk/gtkappchooseronline.c   |    3 ++-
 gtk/gtkappchooseronline.h   |    2 ++
 gtk/gtkappchooseronlinepk.c |    3 ++-
 4 files changed, 19 insertions(+), 4 deletions(-)
---
diff --git a/gtk/gtkappchooserdialog.c b/gtk/gtkappchooserdialog.c
index 28c6bc0..ac1f0af 100644
--- a/gtk/gtkappchooserdialog.c
+++ b/gtk/gtkappchooserdialog.c
@@ -77,6 +77,7 @@ struct _GtkAppChooserDialogPrivate {
   GtkWidget *show_more_button;
 
   GtkAppChooserOnline *online;
+  GCancellable *online_cancellable;
 
   gboolean show_more_clicked;
 };
@@ -128,17 +129,19 @@ search_for_mimetype_ready_cb (GObject      *source,
 
   _gtk_app_chooser_online_search_for_mimetype_finish (online, res, &error);
 
-  if (error != NULL)
+  if (error != NULL &&
+      !g_error_matches (error, G_IO_ERROR, G_IO_ERROR_CANCELLED))
     {
       show_error_dialog (_("Failed to look for applications online"),
                          error->message, GTK_WINDOW (self));
-      g_error_free (error);
     }
   else
     {
       gtk_app_chooser_refresh (GTK_APP_CHOOSER (self->priv->app_chooser_widget));
     }
 
+  g_clear_error (&error);
+
   gdk_threads_leave ();
 }
 
@@ -148,9 +151,11 @@ online_button_clicked_cb (GtkButton *b,
 {
   GtkAppChooserDialog *self = user_data;
 
+  self->priv->online_cancellable = g_cancellable_new ();
   _gtk_app_chooser_online_search_for_mimetype_async (self->priv->online,
 						     self->priv->content_type,
 						     GTK_WINDOW (self),
+                                                     self->priv->online_cancellable,
 						     search_for_mimetype_ready_cb,
 						     self);
 }
@@ -612,6 +617,12 @@ gtk_app_chooser_dialog_dispose (GObject *object)
   g_clear_object (&self->priv->gfile);
   g_clear_object (&self->priv->online);
 
+  if (self->priv->online_cancellable != NULL)
+    {
+      g_cancellable_cancel (self->priv->online_cancellable);
+      g_clear_object (&self->priv->online_cancellable);
+    }
+
   G_OBJECT_CLASS (gtk_app_chooser_dialog_parent_class)->dispose (object);
 }
 
diff --git a/gtk/gtkappchooseronline.c b/gtk/gtkappchooseronline.c
index 99454cd..633d6fb 100644
--- a/gtk/gtkappchooseronline.c
+++ b/gtk/gtkappchooseronline.c
@@ -77,6 +77,7 @@ void
 _gtk_app_chooser_online_search_for_mimetype_async (GtkAppChooserOnline *self,
                                                    const gchar         *content_type,
                                                    GtkWindow           *parent,
+                                                   GCancellable        *cancellable,
                                                    GAsyncReadyCallback  callback,
                                                    gpointer             user_data)
 {
@@ -86,7 +87,7 @@ _gtk_app_chooser_online_search_for_mimetype_async (GtkAppChooserOnline *self,
 
   iface = GTK_APP_CHOOSER_ONLINE_GET_IFACE (self);
 
-  (* iface->search_for_mimetype_async) (self, content_type, parent, callback, user_data);
+  (* iface->search_for_mimetype_async) (self, content_type, parent, cancellable, callback, user_data);
 }
 
 gboolean
diff --git a/gtk/gtkappchooseronline.h b/gtk/gtkappchooseronline.h
index a8316c1..457fb7b 100644
--- a/gtk/gtkappchooseronline.h
+++ b/gtk/gtkappchooseronline.h
@@ -46,6 +46,7 @@ struct _GtkAppChooserOnlineInterface {
   void (*search_for_mimetype_async)      (GtkAppChooserOnline  *self,
                                           const gchar          *content_type,
                                           GtkWindow            *parent,
+                                          GCancellable         *cancellable,
                                           GAsyncReadyCallback   callback,
                                           gpointer              user_data);
 
@@ -64,6 +65,7 @@ GtkAppChooserOnline * _gtk_app_chooser_online_get_default_finish         (GObjec
 void                  _gtk_app_chooser_online_search_for_mimetype_async  (GtkAppChooserOnline  *self,
                                                                           const gchar          *content_type,
                                                                           GtkWindow            *parent,
+                                                                          GCancellable         *cancellable,
                                                                           GAsyncReadyCallback   callback,
                                                                           gpointer              user_data);
 gboolean              _gtk_app_chooser_online_search_for_mimetype_finish (GtkAppChooserOnline  *self,
diff --git a/gtk/gtkappchooseronlinepk.c b/gtk/gtkappchooseronlinepk.c
index 4b6df0e..7bfc84d 100644
--- a/gtk/gtkappchooseronlinepk.c
+++ b/gtk/gtkappchooseronlinepk.c
@@ -124,6 +124,7 @@ static void
 pk_search_mime_async (GtkAppChooserOnline *obj,
                       const gchar         *content_type,
                       GtkWindow           *parent,
+                      GCancellable        *cancellable,
                       GAsyncReadyCallback  callback,
                       gpointer             user_data)
 {
@@ -152,7 +153,7 @@ pk_search_mime_async (GtkAppChooserOnline *obj,
                                     "hide-confirm-search"),
                      G_DBUS_CALL_FLAGS_NONE,
                      G_MAXINT, /* no timeout */
-                     NULL,
+                     cancellable,
                      install_mime_types_ready_cb,
                      self);
 }