Add e_activity_cancel().

Convenience function cancels the activity's GCancellable.

(cherry picked from commit 8b245838de22f470e867b28631240a018a0bc36b)

4 files changed, 30 insertions, 6 deletions

diff --git a/e-util/e-activity-bar.c b/e-util/e-activity-bar.c
index b90996bd9b..51435d3dda 100644
--- a/e-util/e-activity-bar.c
+++ b/e-util/e-activity-bar.c
@@ -150,13 +150,11 @@ static void
 activity_bar_cancel (EActivityBar *bar)
 {
 	EActivity *activity;
-	GCancellable *cancellable;
 
 	activity = e_activity_bar_get_activity (bar);
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
-	cancellable = e_activity_get_cancellable (activity);
-	g_cancellable_cancel (cancellable);
+	e_activity_cancel (activity);
 
 	activity_bar_update (bar);
 }
diff --git a/e-util/e-activity-proxy.c b/e-util/e-activity-proxy.c
index 43c77a522f..aeef5d2cd8 100644
--- a/e-util/e-activity-proxy.c
+++ b/e-util/e-activity-proxy.c
@@ -156,13 +156,11 @@ static void
 activity_proxy_cancel (EActivityProxy *proxy)
 {
 	EActivity *activity;
-	GCancellable *cancellable;
 
 	activity = e_activity_proxy_get_activity (proxy);
 	g_return_if_fail (E_IS_ACTIVITY (activity));
 
-	cancellable = e_activity_get_cancellable (activity);
-	g_cancellable_cancel (cancellable);
+	e_activity_cancel (activity);
 
 	activity_proxy_update (proxy);
 }
diff --git a/e-util/e-activity.c b/e-util/e-activity.c
index e4c121308b..87b84495db 100644
--- a/e-util/e-activity.c
+++ b/e-util/e-activity.c
@@ -383,6 +383,33 @@ e_activity_new (void)
 }
 
 /**
+ * e_activity_cancel:
+ * @activity: an #EActivity
+ *
+ * Convenience function cancels @activity's #EActivity:cancellable.
+ *
+ * <para>
+ *   <note>
+ *     This function will not set @activity's #EActivity:state to
+ *     @E_ACTIVITY_CANCELLED.  It merely requests that the associated
+ *     operation be cancelled.  Only after the operation finishes with
+ *     a @G_IO_ERROR_CANCELLED should the @activity's #EActivity:state
+ *     be changed (see e_activity_handle_cancellation()).  During this
+ *     interim period e_activity_describe() will indicate the activity
+ *     is "cancelling".
+ *   </note>
+ * </para>
+ **/
+void
+e_activity_cancel (EActivity *activity)
+{
+	g_return_if_fail (E_IS_ACTIVITY (activity));
+
+	/* This function handles NULL gracefully. */
+	g_cancellable_cancel (activity->priv->cancellable);
+}
+
+/**
  * e_activity_describe:
  * @activity: an #EActivity
  *
diff --git a/e-util/e-activity.h b/e-util/e-activity.h
index 0ba5753528..9309fe1fb0 100644
--- a/e-util/e-activity.h
+++ b/e-util/e-activity.h
@@ -70,6 +70,7 @@ struct _EActivityClass {
 
 GType		e_activity_get_type		(void) G_GNUC_CONST;
 EActivity *	e_activity_new			(void);
+void		e_activity_cancel		(EActivity *activity);
 gchar *		e_activity_describe		(EActivity *activity);
 EAlertSink *	e_activity_get_alert_sink	(EActivity *activity);
 void		e_activity_set_alert_sink	(EActivity *activity,