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authorFederico Mena Quintero <federico@helixcode.com>2000-11-30 00:09:20 +0800
committerFederico Mena Quintero <federico@src.gnome.org>2000-11-30 00:09:20 +0800
commit101b0ed2c8eeae2a97a3a907d97c479adfd19df3 (patch)
treeb2d99cdd05a46c5befc4594ec238f2adaf52e8a5
parent571a286c62f3cfac1b5c14fefb23d9fed2ed5c01 (diff)
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Upgrade of the alarm framework. We now access alarms by a unique
2000-11-28 Federico Mena Quintero <federico@helixcode.com> Upgrade of the alarm framework. We now access alarms by a unique identifier. This UID is added as an extension property to alarm subcomponents when their parent components are scanned by CalComponent. * cal-util/cal-component.c (CalComponentPrivate): Added a hash table of alarm UIDs -> alarm properties. (cal_component_init): Initialize priv->alarm_uid_hash. (free_icalcomponent): Free the elements in the priv->alarm_uid_hash. (scan_alarm): New function to add scan an alarm subcomponent and ensure that it has an alarm UID extension property so that we can add it to our mapping table. (cal_component_get_first_alarm): Removed function. (cal_component_get_next_alarm): Removed function. (cal_component_get_alarm_uids): New function. (cal_component_get_alarm): New function. svn path=/trunk/; revision=6713
-rw-r--r--calendar/ChangeLog20
-rw-r--r--calendar/cal-util/cal-component.c253
-rw-r--r--calendar/cal-util/cal-component.h4
3 files changed, 240 insertions, 37 deletions
diff --git a/calendar/ChangeLog b/calendar/ChangeLog
index dfd44495eb..f1efbc254b 100644
--- a/calendar/ChangeLog
+++ b/calendar/ChangeLog
@@ -1,3 +1,23 @@
+2000-11-28 Federico Mena Quintero <federico@helixcode.com>
+
+ Upgrade of the alarm framework. We now access alarms by a unique
+ identifier. This UID is added as an extension property to alarm
+ subcomponents when their parent components are scanned by
+ CalComponent.
+
+ * cal-util/cal-component.c (CalComponentPrivate): Added a hash
+ table of alarm UIDs -> alarm properties.
+ (cal_component_init): Initialize priv->alarm_uid_hash.
+ (free_icalcomponent): Free the elements in the
+ priv->alarm_uid_hash.
+ (scan_alarm): New function to add scan an alarm subcomponent and
+ ensure that it has an alarm UID extension property so that we can
+ add it to our mapping table.
+ (cal_component_get_first_alarm): Removed function.
+ (cal_component_get_next_alarm): Removed function.
+ (cal_component_get_alarm_uids): New function.
+ (cal_component_get_alarm): New function.
+
2000-11-28 JP Rosevear <jpr@helixcode.com>
* conduits/todo/todo-conduit.c (local_record_to_pilot_record): Return
diff --git a/calendar/cal-util/cal-component.c b/calendar/cal-util/cal-component.c
index 05c84f1233..d72b810359 100644
--- a/calendar/cal-util/cal-component.c
+++ b/calendar/cal-util/cal-component.c
@@ -28,6 +28,9 @@
+/* Extension property for alarm components so that we can reference them by UID */
+#define EVOLUTION_ALARM_UID_PROPERTY "X-EVOLUTION-ALARM-UID"
+
/* Private part of the CalComponent structure */
struct _CalComponentPrivate {
/* The icalcomponent we wrap */
@@ -97,6 +100,10 @@ struct _CalComponentPrivate {
icalproperty *transparency;
icalproperty *url;
+ /* Subcomponents */
+
+ GHashTable *alarm_uid_hash;
+
/* Whether we should increment the sequence number when piping the
* object over the wire.
*/
@@ -179,6 +186,8 @@ cal_component_init (CalComponent *comp)
priv = g_new0 (CalComponentPrivate, 1);
comp->priv = priv;
+
+ priv->alarm_uid_hash = g_hash_table_new (g_str_hash, g_str_equal);
}
/* Does a simple g_free() of the elements of a GSList and then frees the list
@@ -196,6 +205,16 @@ free_slist (GSList *slist)
return NULL;
}
+/* Used from g_hash_table_foreach_remove() to free the alarm UIDs hash table.
+ * We do not need to do anything to individual elements since we were storing
+ * the UID pointers inside the icalproperties themselves.
+ */
+static gboolean
+free_alarm_cb (gpointer key, gpointer value, gpointer data)
+{
+ return TRUE;
+}
+
/* Frees the internal icalcomponent only if it does not have a parent. If it
* does, it means we don't own it and we shouldn't free it.
*/
@@ -265,6 +284,10 @@ free_icalcomponent (CalComponent *comp)
priv->transparency = NULL;
priv->url = NULL;
+ /* Free the subcomponents */
+
+ g_hash_table_foreach_remove (priv->alarm_uid_hash, free_alarm_cb, NULL);
+
/* Clean up */
priv->need_sequence_inc = FALSE;
@@ -578,27 +601,173 @@ scan_property (CalComponent *comp, icalproperty *prop)
}
}
+/* Gets our alarm UID string from a property that is known to contain it */
+static const char *
+alarm_uid_from_prop (icalproperty *prop)
+{
+ char *xstr;
+
+ g_assert (icalproperty_isa (prop) == ICAL_X_PROPERTY);
+
+ xstr = icalproperty_get_x (prop);
+ g_assert (xstr != NULL);
+
+ return xstr;
+}
+
+/* Sets our alarm UID extension property on an alarm component. Returns a
+ * pointer to the UID string inside the property itself.
+ */
+static const char *
+set_alarm_uid (icalcomponent *alarm, const char *auid)
+{
+ icalproperty *prop;
+ const char *inprop_auid;
+
+ /* Create the new property */
+
+ prop = icalproperty_new_x ((char *) auid);
+ icalproperty_set_x_name (prop, EVOLUTION_ALARM_UID_PROPERTY);
+
+ icalcomponent_add_property (alarm, prop);
+
+ inprop_auid = alarm_uid_from_prop (prop);
+ return inprop_auid;
+}
+
+/* Removes any alarm UID extension properties from an alarm subcomponent */
+static void
+remove_alarm_uid (icalcomponent *alarm)
+{
+ icalproperty *prop;
+ GSList *list, *l;
+
+ list = NULL;
+
+ for (prop = icalcomponent_get_first_property (alarm, ICAL_X_PROPERTY);
+ prop;
+ prop = icalcomponent_get_next_property (alarm, ICAL_X_PROPERTY)) {
+ const char *xname;
+
+ xname = icalproperty_get_x_name (prop);
+ g_assert (xname != NULL);
+
+ if (strcmp (xname, EVOLUTION_ALARM_UID_PROPERTY) == 0)
+ list = g_slist_prepend (list, prop);
+ }
+
+ for (l = list; l; l = l->next) {
+ prop = l->data;
+ icalcomponent_remove_property (alarm, prop);
+ icalproperty_free (prop);
+ }
+
+ g_slist_free (list);
+}
+
+/* Adds an alarm subcomponent to the calendar component's mapping table. The
+ * actual UID with which it gets added may not be the same as the specified one;
+ * this function will change it if the table already had an alarm subcomponent
+ * with the specified UID. Returns the actual UID used.
+ */
+static const char *
+add_alarm (CalComponent *comp, icalcomponent *alarm, const char *auid)
+{
+ CalComponentPrivate *priv;
+ icalcomponent *old_alarm;
+
+ priv = comp->priv;
+
+ /* First we see if we already have an alarm with the requested UID. In
+ * that case, we need to change the new UID to something else. This
+ * should never happen, but who knows.
+ */
+
+ old_alarm = g_hash_table_lookup (priv->alarm_uid_hash, auid);
+ if (old_alarm != NULL) {
+ char *new_auid;
+
+ g_message ("add_alarm(): Got alarm with duplicated UID `%s', changing it...", auid);
+
+ remove_alarm_uid (alarm);
+
+ new_auid = cal_component_gen_uid ();
+ auid = set_alarm_uid (alarm, new_auid);
+ g_free (new_auid);
+ }
+
+ g_hash_table_insert (priv->alarm_uid_hash, (char *) auid, alarm);
+ return auid;
+}
+
+/* Scans an alarm subcomponent, adds an UID extension property to it (so that we
+ * can reference alarms by unique IDs), and adds its mapping to the component. */
+static void
+scan_alarm (CalComponent *comp, icalcomponent *alarm)
+{
+ CalComponentPrivate *priv;
+ icalproperty *prop;
+ const char *auid;
+ char *new_auid;
+
+ priv = comp->priv;
+
+ for (prop = icalcomponent_get_first_property (alarm, ICAL_X_PROPERTY);
+ prop;
+ prop = icalcomponent_get_next_property (alarm, ICAL_X_PROPERTY)) {
+ const char *xname;
+
+ xname = icalproperty_get_x_name (prop);
+ g_assert (xname != NULL);
+
+ if (strcmp (xname, EVOLUTION_ALARM_UID_PROPERTY) == 0) {
+ auid = alarm_uid_from_prop (prop);
+ add_alarm (comp, alarm, auid);
+ return;
+ }
+ }
+
+ /* The component has no alarm UID property, so we create one. */
+
+ new_auid = cal_component_gen_uid ();
+ auid = set_alarm_uid (alarm, new_auid);
+ g_free (new_auid);
+
+ add_alarm (comp, alarm, auid);
+}
+
/* Scans an icalcomponent for its properties so that we can provide
- * random-access to them.
+ * random-access to them. It also builds a hash table of the component's alarm
+ * subcomponents.
*/
static void
scan_icalcomponent (CalComponent *comp)
{
CalComponentPrivate *priv;
icalproperty *prop;
+ icalcompiter iter;
priv = comp->priv;
g_assert (priv->icalcomp != NULL);
+ /* Scan properties */
+
for (prop = icalcomponent_get_first_property (priv->icalcomp, ICAL_ANY_PROPERTY);
prop;
prop = icalcomponent_get_next_property (priv->icalcomp, ICAL_ANY_PROPERTY))
scan_property (comp, prop);
- /* We don't scan for alarm subcomponents since they can be iterated
- * through using cal_component_get_{first,next}_alarm().
- */
+ /* Scan subcomponents */
+
+ for (iter = icalcomponent_begin_component (priv->icalcomp, ICAL_VALARM_COMPONENT);
+ icalcompiter_deref (&iter) != NULL;
+ icalcompiter_next (&iter)) {
+ icalcomponent *subcomp;
+
+ subcomp = icalcompiter_deref (&iter);
+ scan_alarm (comp, subcomp);
+ }
}
/* Ensures that the mandatory calendar component properties (uid, dtstamp) do
@@ -3319,22 +3488,34 @@ make_alarm (CalComponent *comp, icalcomponent *subcomp)
return alarm;
}
+/* Used from g_hash_table_foreach(); adds an alarm UID to a list */
+static void
+add_alarm_uid (gpointer key, gpointer value, gpointer data)
+{
+ const char *auid;
+ GList **l;
+
+ auid = key;
+ l = data;
+
+ *l = g_list_prepend (*l, g_strdup (auid));
+}
+
/**
- * cal_component_get_first_alarm:
- * @comp: A calendar component object.
- *
- * Starts an iterator for the alarms in a calendar component object. Subsequent
- * alarms can be obtained with the cal_component_get_next_alarm() function.
- *
- * Return value: The first alarm in the component, or NULL if the component has
- * no alarms. This should be freed using the cal_component_alarm_free()
- * function.
+ * cal_component_get_alarm_uids:
+ * @comp: A calendar component.
+ *
+ * Builds a list of the unique identifiers of the alarm subcomponents inside a
+ * calendar component.
+ *
+ * Return value: List of unique identifiers for alarms. This should be freed
+ * using cal_obj_uid_list_free().
**/
-CalComponentAlarm *
-cal_component_get_first_alarm (CalComponent *comp)
+GList *
+cal_component_get_alarm_uids (CalComponent *comp)
{
CalComponentPrivate *priv;
- icalcomponent *subcomp;
+ GList *l;
g_return_val_if_fail (comp != NULL, NULL);
g_return_val_if_fail (IS_CAL_COMPONENT (comp), NULL);
@@ -3342,29 +3523,28 @@ cal_component_get_first_alarm (CalComponent *comp)
priv = comp->priv;
g_return_val_if_fail (priv->icalcomp != NULL, NULL);
- subcomp = icalcomponent_get_first_component (priv->icalcomp, ICAL_VALARM_COMPONENT);
- if (!subcomp)
- return NULL;
+ l = NULL;
+ g_hash_table_foreach (priv->alarm_uid_hash, add_alarm_uid, &l);
- return make_alarm (comp, subcomp);
+ return l;
}
/**
- * cal_component_get_next_alarm:
- * @comp: A calendar component object.
- *
- * Gets the next alarm on a calendar component object. This should be used as
- * an iterator function after calling cal_component_get_first_alarm().
- *
- * Return value: The next alarm in the component, or NULL if the component has
- * no more alarms. This should be freed using the cal_component_alarm_free()
- * function.
+ * cal_component_get_alarm:
+ * @comp: A calendar component.
+ * @auid: Unique identifier for the sought alarm subcomponent.
+ *
+ * Queries a particular alarm subcomponent of a calendar component.
+ *
+ * Return value: The alarm subcomponent that corresponds to the specified @auid,
+ * or #NULL if no alarm exists with that UID. This should be freed using
+ * cal_component_alarm_free().
**/
CalComponentAlarm *
-cal_component_get_next_alarm (CalComponent *comp)
+cal_component_get_alarm (CalComponent *comp, const char *auid)
{
CalComponentPrivate *priv;
- icalcomponent *subcomp;
+ icalcomponent *alarm;
g_return_val_if_fail (comp != NULL, NULL);
g_return_val_if_fail (IS_CAL_COMPONENT (comp), NULL);
@@ -3372,11 +3552,14 @@ cal_component_get_next_alarm (CalComponent *comp)
priv = comp->priv;
g_return_val_if_fail (priv->icalcomp != NULL, NULL);
- subcomp = icalcomponent_get_next_component (priv->icalcomp, ICAL_VALARM_COMPONENT);
- if (!subcomp)
- return NULL;
+ g_return_val_if_fail (auid != NULL, NULL);
- return make_alarm (comp, subcomp);
+ alarm = g_hash_table_lookup (priv->alarm_uid_hash, auid);
+
+ if (alarm)
+ return make_alarm (comp, alarm);
+ else
+ return NULL;
}
/**
diff --git a/calendar/cal-util/cal-component.h b/calendar/cal-util/cal-component.h
index 32c3449b55..eb4b129f17 100644
--- a/calendar/cal-util/cal-component.h
+++ b/calendar/cal-util/cal-component.h
@@ -295,8 +295,8 @@ typedef struct {
} CalComponentAlarmTrigger;
gboolean cal_component_has_alarms (CalComponent *comp);
-CalComponentAlarm *cal_component_get_first_alarm (CalComponent *comp);
-CalComponentAlarm *cal_component_get_next_alarm (CalComponent *comp);
+GList *cal_component_get_alarm_uids (CalComponent *comp);
+CalComponentAlarm *cal_component_get_alarm (CalComponent *comp, const char *auid);
void cal_component_alarm_free (CalComponentAlarm *alarm);