[evolution-data-server/openismus-work-master: 9/10] Really implement e_cal_client_view_set_fields_of_interest().

[Tristan Van Berkom <tvb src gnome org>]

commit dac6d9434d63735ac1bcc715b74c51b23a7b81f1
Author: Tristan Van Berkom <tristan van berkom gmail com>
Date:   Wed Aug 17 18:58:08 2011 +0200

    Really implement e_cal_client_view_set_fields_of_interest().
    
    As discussed on bug https://bugzilla.gnome.org/show_bug.cgi?id=652180,
    this patch adds many '_component' variants to functions that are named
    with '_object', all the '_component' variants take an ECalComponent object
    instead of an ical string.
    
    The magic filtering happens in e_data_cal_view_get_component_string()
    which creates an ical string representation while omitting properties
    that are not mentioned in the fields of interest.

 calendar/backends/caldav/e-cal-backend-caldav.c    |  156 ++++++----
 .../backends/contacts/e-cal-backend-contacts.c     |    2 +-
 calendar/backends/file/e-cal-backend-file.c        |  223 +++++++++------
 calendar/backends/http/e-cal-backend-http.c        |   11 +-
 calendar/libedata-cal/e-cal-backend-sync.c         |   68 +++--
 calendar/libedata-cal/e-cal-backend-sync.h         |   12 +-
 calendar/libedata-cal/e-cal-backend.c              |  219 ++++++++++++++-
 calendar/libedata-cal/e-cal-backend.h              |    8 +
 calendar/libedata-cal/e-data-cal-view.c            |  296 +++++++++++++++++++-
 calendar/libedata-cal/e-data-cal-view.h            |    8 +
 calendar/libedata-cal/e-data-cal.c                 |   19 +-
 calendar/libedata-cal/e-data-cal.h                 |    6 +-
 12 files changed, 806 insertions(+), 222 deletions(-)
---
diff --git a/calendar/backends/caldav/e-cal-backend-caldav.c b/calendar/backends/caldav/e-cal-backend-caldav.c
index 12d9c06..06e6931 100644
--- a/calendar/backends/caldav/e-cal-backend-caldav.c
+++ b/calendar/backends/caldav/e-cal-backend-caldav.c
@@ -3417,7 +3417,7 @@ replace_master (ECalBackendCalDAV *cbdav, icalcomponent *old_comp, icalcomponent
 
 /* a busy_lock is supposed to be locked already, when calling this function */
 static void
-do_create_object (ECalBackendCalDAV *cbdav, const gchar *in_calobj, gchar **uid, gchar **new_calobj, GError **perror)
+do_create_object (ECalBackendCalDAV *cbdav, const gchar *in_calobj, gchar **uid, ECalComponent **new_component, GError **perror)
 {
 	ECalComponent            *comp;
 	gboolean                  online, did_put = FALSE;
@@ -3499,13 +3499,18 @@ do_create_object (ECalBackendCalDAV *cbdav, const gchar *in_calobj, gchar **uid,
 			icalcomponent *master = get_master_comp (cbdav, icalcomp);
 
 			if (!master)
-				*new_calobj = e_cal_component_get_as_string (comp);
-			else
-				*new_calobj = icalcomponent_as_ical_string_r (master);
+				*new_component = g_object_ref (comp);
+			else {
+				gchar *str = icalcomponent_as_ical_string_r (master);
+
+				*new_component = e_cal_component_new_from_string (str);
+
+				g_free (str);
+			}
 
 			icalcomponent_free (icalcomp);
 		} else {
-			*new_calobj = e_cal_component_get_as_string (comp);
+			*new_component = g_object_ref (comp);
 		}
 	}
 
@@ -3514,7 +3519,7 @@ do_create_object (ECalBackendCalDAV *cbdav, const gchar *in_calobj, gchar **uid,
 
 /* a busy_lock is supposed to be locked already, when calling this function */
 static void
-do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType mod, gchar **old_object, gchar **new_object, GError **error)
+do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **error)
 {
 	ECalBackendCalDAVPrivate *priv;
 	ECalComponent            *comp;
@@ -3526,8 +3531,8 @@ do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType m
 
 	priv  = cbdav->priv;
 
-	if (new_object)
-		*new_object = NULL;
+	if (new_component)
+		*new_component = NULL;
 
 	if (!check_state (cbdav, &online, error))
 		return;
@@ -3573,25 +3578,29 @@ do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType m
 		/*ecalcomp_set_synch_state (comp, ECALCOMP_LOCALLY_MODIFIED);*/
 	}
 
-	if (old_object) {
-		*old_object = NULL;
+	if (old_component) {
+		*old_component = NULL;
 
 		if (e_cal_component_is_instance (comp)) {
 			/* set detached instance as the old object, if any */
 			ECalComponent *old_instance = e_cal_backend_store_get_component (priv->store, id->uid, id->rid);
 
+			/* This will give a reference to 'old_component' */
 			if (old_instance) {
-				*old_object = e_cal_component_get_as_string (old_instance);
-				g_object_unref (old_instance);
+				*old_component = old_instance;
 			}
 		}
 
-		if (!*old_object) {
+		if (!*old_component) {
 			icalcomponent *master = get_master_comp (cbdav, cache_comp);
 
 			if (master) {
 				/* set full component as the old object */
-				*old_object = icalcomponent_as_ical_string_r (master);
+				gchar *str = icalcomponent_as_ical_string_r (master);
+
+				*old_component = e_cal_component_new_from_string (str);
+
+				g_free (str);
 			}
 		}
 	}
@@ -3603,8 +3612,8 @@ do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType m
 			icalcomponent *new_comp = e_cal_component_get_icalcomponent (comp);
 
 			/* new object is only this instance */
-			if (new_object)
-				*new_object = e_cal_component_get_as_string (comp);
+			if (new_component)
+				*new_component = g_object_ref (comp);
 
 			/* add the detached instance */
 			if (icalcomponent_isa (cache_comp) == ICAL_VCALENDAR_COMPONENT) {
@@ -3658,7 +3667,7 @@ do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType m
 	}
 
 	if (did_put) {
-		if (new_object && !*new_object) {
+		if (new_component && !*new_component) {
 			/* read the comp from cache again, as some servers can modify it on put */
 			icalcomponent *newcomp = get_comp_from_cache (cbdav, id->uid, NULL, NULL, NULL), *master;
 
@@ -3667,8 +3676,13 @@ do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType m
 
 			master = get_master_comp (cbdav, newcomp);
 
-			if (master)
-				*new_object = icalcomponent_as_ical_string_r (master);
+			if (master) {
+				gchar *str = icalcomponent_as_ical_string_r (master);
+
+				*new_component = e_cal_component_new_from_string (str);
+
+				g_free (str);
+			}
 
 			if (cache_comp != newcomp)
 				icalcomponent_free (newcomp);
@@ -3684,7 +3698,7 @@ do_modify_object (ECalBackendCalDAV *cbdav, const gchar *calobj, CalObjModType m
 
 /* a busy_lock is supposed to be locked already, when calling this function */
 static void
-do_remove_object (ECalBackendCalDAV *cbdav, const gchar *uid, const gchar *rid, CalObjModType mod, gchar **old_object, gchar **object, GError **perror)
+do_remove_object (ECalBackendCalDAV *cbdav, const gchar *uid, const gchar *rid, CalObjModType mod, ECalComponent **old_component, ECalComponent **component, GError **perror)
 {
 	ECalBackendCalDAVPrivate *priv;
 	icalcomponent            *cache_comp;
@@ -3693,8 +3707,8 @@ do_remove_object (ECalBackendCalDAV *cbdav, const gchar *uid, const gchar *rid,
 
 	priv  = cbdav->priv;
 
-	if (object)
-		*object = NULL;
+	if (component)
+		*component = NULL;
 
 	if (!check_state (cbdav, &online, perror))
 		return;
@@ -3706,17 +3720,21 @@ do_remove_object (ECalBackendCalDAV *cbdav, const gchar *uid, const gchar *rid,
 		return;
 	}
 
-	if (old_object) {
+	if (old_component) {
 		ECalComponent *old = e_cal_backend_store_get_component (priv->store, uid, rid);
 
 		if (old) {
-			*old_object = e_cal_component_get_as_string (old);
-			g_object_unref (old);
+			*old_component = old;
 		} else {
 			icalcomponent *master = get_master_comp (cbdav, cache_comp);
 
-			if (master)
-				*old_object = icalcomponent_as_ical_string_r (master);
+			if (master) {
+				gchar *str = icalcomponent_as_ical_string_r (master);
+
+				*old_component = e_cal_component_new_from_string (str);
+
+				g_free (str);
+			}
 		}
 	}
 
@@ -3726,11 +3744,16 @@ do_remove_object (ECalBackendCalDAV *cbdav, const gchar *uid, const gchar *rid,
 		if (rid && *rid) {
 			/* remove one instance from the component */
 			if (remove_instance (cbdav, cache_comp, icaltime_from_string (rid), mod, mod != CALOBJ_MOD_ONLY_THIS)) {
-				if (object) {
+				if (component) {
 					icalcomponent *master = get_master_comp (cbdav, cache_comp);
 
-					if (master)
-						*object = icalcomponent_as_ical_string_r (master);
+					if (master) {
+						gchar *str = icalcomponent_as_ical_string_r (master);
+
+						*component = e_cal_component_new_from_string (str);
+
+						g_free (str);
+					}
 				}
 			} else {
 				/* this was the last instance, thus delete whole component */
@@ -3889,60 +3912,69 @@ process_object (ECalBackendCalDAV   *cbdav,
 		is_declined = e_cal_backend_user_declined (e_cal_component_get_icalcomponent (ecomp));
 		if (is_in_cache) {
 			if (!is_declined) {
-				gchar *new_object = NULL, *old_object = NULL;
+				ECalComponent *new_component = NULL, *old_component = NULL;
 
-				do_modify_object (cbdav, new_obj_str, mod, &old_object, &new_object, &err);
+				do_modify_object (cbdav, new_obj_str, mod, 
+						  &old_component, &new_component, &err);
 				if (!err) {
-					if (!old_object)
-						e_cal_backend_notify_object_created (backend, new_object);
+					if (!old_component)
+						e_cal_backend_notify_component_created (backend, new_component);
 					else
-						e_cal_backend_notify_object_modified (backend, old_object, new_object);
+						e_cal_backend_notify_component_modified (backend, old_component, new_component);
 				}
 
-				g_free (new_object);
-				g_free (old_object);
+				if (new_component)
+					g_object_unref (new_component);
+				if (old_component)
+					g_object_unref (old_component);
 			} else {
-				gchar *new_object = NULL, *old_object = NULL;
+				ECalComponent *new_component = NULL, *old_component = NULL;
 
-				do_remove_object (cbdav, id->uid, id->rid, mod, &old_object, &new_object, &err);
+				do_remove_object (cbdav, id->uid, id->rid, mod, &old_component, &new_component, &err);
 				if (!err) {
-					if (new_object) {
-						e_cal_backend_notify_object_modified (backend, old_object, new_object);
+					if (new_component) {
+						e_cal_backend_notify_component_modified (backend, old_component, new_component);
 					} else {
-						e_cal_backend_notify_object_removed (backend, id, old_object, NULL);
+						e_cal_backend_notify_component_removed (backend, id, old_component, NULL);
 					}
 				}
 
-				g_free (new_object);
-				g_free (old_object);
+				if (new_component)
+					g_object_unref (new_component);
+				if (old_component)
+					g_object_unref (old_component);
 			}
 		} else if (!is_declined) {
-			gchar *new_object = new_obj_str;
+			ECalComponent *new_component = NULL;
+
+			do_create_object (cbdav, new_obj_str, NULL, &new_component, &err);
 
-			do_create_object (cbdav, new_object, NULL, &new_object, &err);
 			if (!err) {
-				e_cal_backend_notify_object_created (backend, new_object);
+				e_cal_backend_notify_component_created (backend, new_component);
 			}
 
-			if (new_object != new_obj_str)
-				g_free (new_object);
+			if (new_component)
+				g_object_unref (new_component);
+
 		}
 		break;
 	case ICAL_METHOD_CANCEL:
 		if (is_in_cache) {
-			gchar *old_object = NULL, *new_object = NULL;
+			ECalComponent *new_component = NULL, *old_component = NULL;
 
-			do_remove_object (cbdav, id->uid, id->rid, CALOBJ_MOD_THIS, &old_object, &new_object, &err);
+			do_remove_object (cbdav, id->uid, id->rid, CALOBJ_MOD_THIS, &old_component, &new_component, &err);
 			if (!err) {
-				if (new_object) {
-					e_cal_backend_notify_object_modified (backend, old_object, new_object);
+				if (new_component) {
+					e_cal_backend_notify_component_modified (backend, old_component, new_component);
 				} else {
-					e_cal_backend_notify_object_removed (backend, id, old_object, NULL);
+					e_cal_backend_notify_component_removed (backend, id, old_component, NULL);
 				}
 			}
 
-			g_free (old_object);
-			g_free (new_object);
+			if (new_component)
+				g_object_unref (new_component);
+			if (old_component)
+				g_object_unref (old_component);
 		} else {
 			err = EDC_ERROR (ObjectNotFound);
 		}
@@ -4060,16 +4092,16 @@ _func_name _params							\
 }
 
 caldav_busy_stub (
-	caldav_create_object, (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *in_calobj, gchar **uid, gchar **new_calobj, GError **perror),
-	do_create_object, (cbdav, in_calobj, uid, new_calobj, perror))
+	caldav_create_object, (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *in_calobj, gchar **uid, ECalComponent **new_component, GError **perror),
+	do_create_object, (cbdav, in_calobj, uid, new_component, perror))
 
 caldav_busy_stub (
-	caldav_modify_object, (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, CalObjModType mod, gchar **old_object, gchar **new_object, GError **perror),
-	do_modify_object, (cbdav, calobj, mod, old_object, new_object, perror))
+        caldav_modify_object, (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **perror),
+	do_modify_object, (cbdav, calobj, mod, old_component, new_component, perror))
 
 caldav_busy_stub (
-	caldav_remove_object, (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, CalObjModType mod, gchar **old_object, gchar **object, GError **perror),
-	do_remove_object, (cbdav, uid, rid, mod, old_object, object, perror))
+	caldav_remove_object, (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, CalObjModType mod, ECalComponent **old_component, ECalComponent **component, GError **perror),
+	do_remove_object, (cbdav, uid, rid, mod, old_component, component, perror))
 
 caldav_busy_stub (
 	caldav_receive_objects, (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, GError **perror),
diff --git a/calendar/backends/contacts/e-cal-backend-contacts.c b/calendar/backends/contacts/e-cal-backend-contacts.c
index afa5b7d..7e45242 100644
--- a/calendar/backends/contacts/e-cal-backend-contacts.c
+++ b/calendar/backends/contacts/e-cal-backend-contacts.c
@@ -1168,7 +1168,7 @@ e_cal_backend_contacts_init (ECalBackendContacts *cbc)
 }
 
 static void
-e_cal_backend_contacts_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, gchar **new_calobj, GError **perror)
+e_cal_backend_contacts_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, ECalComponent **new_component, GError **perror)
 {
 	g_propagate_error (perror, EDC_ERROR (PermissionDenied));
 }
diff --git a/calendar/backends/file/e-cal-backend-file.c b/calendar/backends/file/e-cal-backend-file.c
index 02f81d9..72f4d55 100644
--- a/calendar/backends/file/e-cal-backend-file.c
+++ b/calendar/backends/file/e-cal-backend-file.c
@@ -1048,18 +1048,14 @@ notify_adds_modifies_cb (gpointer key, gpointer value, gpointer data)
 
 	if (!old_obj_data) {
 		/* Object was added */
-
-		new_icomp = e_cal_component_get_icalcomponent (new_obj_data->full_object);
-		if (!new_icomp)
-			return;
-
-		new_obj_str = icalcomponent_as_ical_string_r (new_icomp);
-		if (!new_obj_str)
-			return;
-
-		e_cal_backend_notify_object_created (context->backend, new_obj_str);
-		g_free (new_obj_str);
+		e_cal_backend_notify_component_created (context->backend, new_obj_data->full_object);
 	} else {
+
+		/* Check the component internals and compare the serialized ical strings
+		 * to check for the difference, This should probably be better handled
+		 * with something like:
+		 *    gboolean e_cal_component_compare (component_a, component_b);
+		 */
 		old_icomp = e_cal_component_get_icalcomponent (old_obj_data->full_object);
 		new_icomp = e_cal_component_get_icalcomponent (new_obj_data->full_object);
 		if (!old_icomp || !new_icomp)
@@ -1072,9 +1068,11 @@ notify_adds_modifies_cb (gpointer key, gpointer value, gpointer data)
 
 		if (strcmp (old_obj_str, new_obj_str)) {
 			/* Object was modified */
-
-			e_cal_backend_notify_object_modified (context->backend, old_obj_str, new_obj_str);
+			e_cal_backend_notify_component_modified (context->backend,
+								 old_obj_data->full_object,
+								 new_obj_data->full_object);
 		}
+
 		g_free (old_obj_str);
 		g_free (new_obj_str);
 	}
@@ -1520,8 +1518,23 @@ typedef struct {
 	const gchar *query;
 	ECalBackendSExp *obj_sexp;
 	ECalBackend *backend;
+	EDataCalView *view;
 } MatchObjectData;
 
+
+static GSList *
+append_component (GSList *list, MatchObjectData *match_data, ECalComponent *comp)
+{
+	gchar *str;
+
+	if (match_data->view)
+		str = e_data_cal_view_get_component_string (match_data->view, comp);
+	else
+		str = e_cal_component_get_as_string (comp);
+
+	return g_slist_append (list, str);
+}
+
 static void
 match_object_sexp_to_component (gpointer value, gpointer data)
 {
@@ -1544,7 +1557,8 @@ match_object_sexp_to_component (gpointer value, gpointer data)
 
 	if ((!match_data->search_needed) ||
 	    (e_cal_backend_sexp_match_comp (match_data->obj_sexp, comp, match_data->backend))) {
-		match_data->obj_list = g_slist_append (match_data->obj_list, e_cal_component_get_as_string (comp));
+
+		match_data->obj_list = append_component (match_data->obj_list, match_data, comp);
 	}
 }
 
@@ -1556,7 +1570,7 @@ match_recurrence_sexp (gpointer key, gpointer value, gpointer data)
 
 	if ((!match_data->search_needed) ||
 	    (e_cal_backend_sexp_match_comp (match_data->obj_sexp, comp, match_data->backend))) {
-		match_data->obj_list = g_slist_append (match_data->obj_list, e_cal_component_get_as_string (comp));
+		match_data->obj_list = append_component (match_data->obj_list, match_data, comp);
 	}
 }
 
@@ -1568,8 +1582,11 @@ match_object_sexp (gpointer key, gpointer value, gpointer data)
 
 	if (obj_data->full_object) {
 		if ((!match_data->search_needed) ||
-		    (e_cal_backend_sexp_match_comp (match_data->obj_sexp, obj_data->full_object, match_data->backend))) {
-			match_data->obj_list = g_slist_append (match_data->obj_list, e_cal_component_get_as_string (obj_data->full_object));
+		    (e_cal_backend_sexp_match_comp (match_data->obj_sexp, 
+						    obj_data->full_object, match_data->backend))) {
+
+			match_data->obj_list =
+				append_component (match_data->obj_list, match_data, obj_data->full_object);
 		}
 	}
 
@@ -1585,7 +1602,7 @@ e_cal_backend_file_get_object_list (ECalBackendSync *backend, EDataCal *cal, GCa
 {
 	ECalBackendFile *cbfile;
 	ECalBackendFilePrivate *priv;
-	MatchObjectData match_data;
+	MatchObjectData match_data = { 0, };
 	time_t occur_start = -1, occur_end = -1;
 	gboolean prunning_by_time;
 	GList* objs_occuring_in_tw;
@@ -1760,14 +1777,16 @@ e_cal_backend_file_start_view (ECalBackend *backend, EDataCalView *query)
 {
 	ECalBackendFile *cbfile;
 	ECalBackendFilePrivate *priv;
-	MatchObjectData match_data;
+	MatchObjectData match_data = { 0, };
 	time_t occur_start = -1, occur_end = -1;
 	gboolean prunning_by_time;
 	GList* objs_occuring_in_tw;
 	cbfile = E_CAL_BACKEND_FILE (backend);
 	priv = cbfile->priv;
 
-	d(g_message (G_STRLOC ": Starting query (%s)", e_data_cal_view_get_text (query)));
+	d(g_message (G_STRLOC ": Starting query (%s) has fields-of-interest %s",
+		     e_data_cal_view_get_text (query), 
+		     e_data_cal_view_get_fields_of_interest (query) ? "yes" : "no"));
 
 	/* try to match all currently existing objects */
 	match_data.search_needed = TRUE;
@@ -1775,6 +1794,7 @@ e_cal_backend_file_start_view (ECalBackend *backend, EDataCalView *query)
 	match_data.obj_list = NULL;
 	match_data.backend = backend;
 	match_data.obj_sexp = e_data_cal_view_get_object_sexp (query);
+	match_data.view = query;
 
 	if (!strcmp (match_data.query, "#t"))
 		match_data.search_needed = FALSE;
@@ -1818,7 +1838,7 @@ e_cal_backend_file_start_view (ECalBackend *backend, EDataCalView *query)
 
 	/* notify listeners of all objects */
 	if (match_data.obj_list) {
-		e_data_cal_view_notify_objects_added (query, match_data.obj_list);
+		e_data_cal_view_notify_components_added (query, match_data.obj_list);
 
 		/* free memory */
 		g_slist_foreach (match_data.obj_list, (GFunc) g_free, NULL);
@@ -2112,7 +2132,7 @@ sanitize_component (ECalBackendFile *cbfile, ECalComponent *comp)
 }
 
 static void
-e_cal_backend_file_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *in_calobj, gchar **uid, gchar **new_object, GError **error)
+e_cal_backend_file_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *in_calobj, gchar **uid, ECalComponent **new_component, GError **error)
 {
 	ECalBackendFile *cbfile;
 	ECalBackendFilePrivate *priv;
@@ -2126,7 +2146,7 @@ e_cal_backend_file_create_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 
 	e_return_data_cal_error_if_fail (priv->icalcomp != NULL, NoSuchCal);
 	e_return_data_cal_error_if_fail (in_calobj != NULL, ObjectNotFound);
-	e_return_data_cal_error_if_fail (new_object != NULL, ObjectNotFound);
+	e_return_data_cal_error_if_fail (new_component != NULL, ObjectNotFound);
 
 	/* Parse the icalendar text */
 	icalcomp = icalparser_parse_string (in_calobj);
@@ -2192,7 +2212,10 @@ e_cal_backend_file_create_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 	/* Return the UID and the modified component */
 	if (uid)
 		*uid = g_strdup (comp_uid);
-	*new_object = e_cal_component_get_as_string (comp);
+
+	/* Give a reference to the caller */
+	if (new_component)
+		*new_component = g_object_ref (comp);
 
 	g_static_rec_mutex_unlock (&priv->idle_save_rmutex);
 }
@@ -2232,8 +2255,9 @@ remove_object_instance_cb (gpointer key, gpointer value, gpointer user_data)
 }
 
 static void
-e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj,
-				  CalObjModType mod, gchar **old_object, gchar **new_object, GError **error)
+e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable,
+				  const gchar *calobj, CalObjModType mod,
+				  ECalComponent **old_component, ECalComponent **new_component, GError **error)
 {
 	RemoveRecurrenceData rrdata;
 	ECalBackendFile *cbfile;
@@ -2306,8 +2330,9 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 	switch (mod) {
 	case CALOBJ_MOD_THIS :
 		if (!rid || !*rid) {
-			if (old_object && obj_data->full_object)
-				*old_object = e_cal_component_get_as_string (obj_data->full_object);
+
+			if (old_component && obj_data->full_object)
+				*old_component = g_object_ref (obj_data->full_object);
 
 			/* replace only the full object */
 			if (obj_data->full_object) {
@@ -2327,8 +2352,8 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 
 			save (cbfile);
 
-			if (new_object)
-				*new_object = e_cal_component_get_as_string (comp);
+			if (new_component)
+				*new_component = g_object_ref (comp);
 
 			g_static_rec_mutex_unlock (&priv->idle_save_rmutex);
 			g_free (rid);
@@ -2336,8 +2361,9 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 		}
 
 		if (g_hash_table_lookup_extended (obj_data->recurrences, rid, (gpointer *)&real_rid, (gpointer *)&recurrence)) {
-			if (old_object)
-				*old_object = e_cal_component_get_as_string (recurrence);
+
+			if (old_component)
+				*old_component = g_object_ref (recurrence);
 
 			/* remove the component from our data */
 			icalcomponent_remove_component (priv->icalcomp,
@@ -2360,8 +2386,9 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 	case CALOBJ_MOD_THISANDPRIOR :
 	case CALOBJ_MOD_THISANDFUTURE :
 		if (!rid || !*rid) {
-			if (old_object && obj_data->full_object)
-				*old_object = e_cal_component_get_as_string (obj_data->full_object);
+
+			if (old_component && obj_data->full_object)
+				*old_component = g_object_ref (obj_data->full_object);
 
 			remove_component (cbfile, comp_uid, obj_data);
 
@@ -2382,8 +2409,9 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 		/* now deal with the detached recurrence */
 		if (g_hash_table_lookup_extended (obj_data->recurrences, rid,
 						  (gpointer *)&real_rid, (gpointer *)&recurrence)) {
-			if (old_object)
-				*old_object = e_cal_component_get_as_string (recurrence);
+
+			if (old_component && obj_data->full_object)
+				*old_component = g_object_ref (recurrence);
 
 			/* remove the component from our data */
 			icalcomponent_remove_component (priv->icalcomp,
@@ -2392,8 +2420,8 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 			obj_data->recurrences_list = g_list_remove (obj_data->recurrences_list, recurrence);
 			g_hash_table_remove (obj_data->recurrences, rid);
 		} else {
-			if (old_object && obj_data->full_object)
-				*old_object = e_cal_component_get_as_string (obj_data->full_object);
+			if (old_component && obj_data->full_object)
+				*old_component = g_object_ref (obj_data->full_object);
 		}
 
 		rrdata.cbfile = cbfile;
@@ -2423,8 +2451,8 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 		break;
 	case CALOBJ_MOD_ALL :
 		/* Remove the old version */
-		if (old_object && obj_data->full_object)
-			*old_object = e_cal_component_get_as_string (obj_data->full_object);
+		if (old_component && obj_data->full_object)
+			*old_component = g_object_ref (obj_data->full_object);
 
 		if (obj_data->recurrences_list) {
 			/* has detached components, preserve them */
@@ -2468,8 +2496,8 @@ e_cal_backend_file_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 	save (cbfile);
 	g_free (rid);
 
-	if (new_object)
-		*new_object = e_cal_component_get_as_string (comp);
+	if (new_component)
+		*new_component = g_object_ref (comp);
 
 	g_static_rec_mutex_unlock (&priv->idle_save_rmutex);
 }
@@ -2492,7 +2520,7 @@ static ECalBackendFileObject *
 remove_instance (ECalBackendFile *cbfile, ECalBackendFileObject *obj_data,
 		 const gchar *uid, const gchar *rid,
 		 CalObjModType mod,
-		 gchar **old_object, gchar **object,
+		 ECalComponent **old_component, ECalComponent **component,
 		 GError **error)
 {
 	gchar *hash_rid;
@@ -2509,9 +2537,9 @@ remove_instance (ECalBackendFile *cbfile, ECalBackendFileObject *obj_data,
 						  (gpointer *)&hash_rid, (gpointer *)&comp)) {
 			/* Removing without parent or not modifying parent?
 			   Report removal to caller. */
-			if (old_object &&
+			if (old_component &&
 			    (!obj_data->full_object || mod == CALOBJ_MOD_ONLY_THIS))
-				*old_object = e_cal_component_get_as_string (comp);
+				*old_component = g_object_ref (comp);
 
 			/* Reporting parent modification to caller?
 			   Report directly instead of going via caller. */
@@ -2560,8 +2588,8 @@ remove_instance (ECalBackendFile *cbfile, ECalBackendFileObject *obj_data,
 		cbfile->priv->comp = g_list_remove (cbfile->priv->comp, obj_data->full_object);
 
 		/* add EXDATE or EXRULE to parent, report as update */
-		if (old_object)
-			*old_object = e_cal_component_get_as_string (obj_data->full_object);
+		if (old_component)
+			*old_component = g_object_ref (obj_data->full_object);
 		e_cal_util_remove_instances (e_cal_component_get_icalcomponent (obj_data->full_object),
 					     icaltime_from_string (rid), CALOBJ_MOD_THIS);
 
@@ -2571,8 +2599,8 @@ remove_instance (ECalBackendFile *cbfile, ECalBackendFileObject *obj_data,
 		e_cal_component_set_last_modified (obj_data->full_object, &current);
 
 		/* report update */
-		if (object)
-			*object = e_cal_component_get_as_string (obj_data->full_object);
+		if (component)
+			*component = g_object_ref (obj_data->full_object);
 
 		/* add the modified object to the beginning of the list,
 		   so that it's always before any detached instance we
@@ -2601,8 +2629,8 @@ remove_instance (ECalBackendFile *cbfile, ECalBackendFileObject *obj_data,
 		cbfile->priv->comp = g_list_remove (cbfile->priv->comp, obj_data->full_object);
 
 		/* remove parent, report as removal */
-		if (old_object)
-			*old_object = e_cal_component_get_as_string (obj_data->full_object);
+		if (old_component)
+			*old_component = g_object_ref (obj_data->full_object);
 		g_object_unref (obj_data->full_object);
 		obj_data->full_object = NULL;
 
@@ -2617,8 +2645,8 @@ remove_instance (ECalBackendFile *cbfile, ECalBackendFileObject *obj_data,
 	return obj_data;
 }
 
-static gchar *
-get_object_string_from_fileobject (ECalBackendFileObject *obj_data, const gchar *rid)
+static ECalComponent *
+ref_object_from_fileobject (ECalBackendFileObject *obj_data, const gchar *rid)
 {
 	ECalComponent *comp = obj_data->full_object;
 	gchar *real_rid;
@@ -2627,14 +2655,14 @@ get_object_string_from_fileobject (ECalBackendFileObject *obj_data, const gchar
 		return NULL;
 
 	if (!rid) {
-		return e_cal_component_get_as_string (comp);
+		return g_object_ref (comp);
 	} else {
 		if (g_hash_table_lookup_extended (obj_data->recurrences, rid, (gpointer *)&real_rid, (gpointer *)&comp))
-			return e_cal_component_get_as_string (comp);
+			return g_object_ref (comp);
 		else {
 			/* FIXME remove this once we delete an instance from master object through
 			   modify request by setting exception */
-			return e_cal_component_get_as_string (comp);
+			return g_object_ref (comp);
 		}
 	}
 
@@ -2644,9 +2672,8 @@ get_object_string_from_fileobject (ECalBackendFileObject *obj_data, const gchar
 /* Remove_object handler for the file backend */
 static void
 e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable,
-				  const gchar *uid, const gchar *rid,
-				  CalObjModType mod, gchar **old_object,
-				  gchar **object, GError **error)
+				  const gchar *uid, const gchar *rid, CalObjModType mod,
+				  ECalComponent **old_component, ECalComponent **component, GError **error)
 {
 	ECalBackendFile *cbfile;
 	ECalBackendFilePrivate *priv;
@@ -2672,7 +2699,7 @@ e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 		return;
 	}
 
-	*old_object = *object = NULL;
+	*old_component = *component = NULL;
 
 	g_static_rec_mutex_lock (&priv->idle_save_rmutex);
 
@@ -2688,14 +2715,15 @@ e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 
 	switch (mod) {
 	case CALOBJ_MOD_ALL :
-		*old_object = get_object_string_from_fileobject (obj_data, recur_id);
+		*old_component = ref_object_from_fileobject (obj_data, recur_id);
+
 		remove_component (cbfile, uid, obj_data);
 
-		*object = NULL;
+		*component = NULL;
 		break;
 	case CALOBJ_MOD_ONLY_THIS:
 	case CALOBJ_MOD_THIS :
-		obj_data = remove_instance (cbfile, obj_data, uid, recur_id, mod, old_object, object, error);
+		obj_data = remove_instance (cbfile, obj_data, uid, recur_id, mod, old_component, component, error);
 		break;
 	case CALOBJ_MOD_THISANDPRIOR :
 	case CALOBJ_MOD_THISANDFUTURE :
@@ -2708,7 +2736,7 @@ e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 		}
 
 		if (comp) {
-			*old_object = e_cal_component_get_as_string (comp);
+			*old_component = e_cal_component_clone (comp);
 
 			/* remove the component from our data, temporarily */
 			icalcomponent_remove_component (priv->icalcomp,
@@ -2733,7 +2761,7 @@ e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 			priv->comp = g_list_prepend (priv->comp, comp);
 
 		if (obj_data->full_object)
-			*object = e_cal_component_get_as_string (obj_data->full_object);
+			*component = g_object_ref (obj_data->full_object);
 		break;
 	}
 
@@ -2743,7 +2771,7 @@ e_cal_backend_file_remove_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 }
 
 static gboolean
-cancel_received_object (ECalBackendFile *cbfile, icalcomponent *icalcomp, gchar **old_object, gchar **new_object)
+cancel_received_object (ECalBackendFile *cbfile, icalcomponent *icalcomp, ECalComponent **old_component, ECalComponent **new_component)
 {
 	ECalBackendFileObject *obj_data;
 	ECalBackendFilePrivate *priv;
@@ -2753,8 +2781,7 @@ cancel_received_object (ECalBackendFile *cbfile, icalcomponent *icalcomp, gchar
 
 	priv = cbfile->priv;
 
-	*old_object = NULL;
-	*new_object = NULL;
+	*old_component = *new_component = NULL;
 
 	/* Find the old version of the component. */
 	obj_data = g_hash_table_lookup (priv->comp_uid_hash, uid);
@@ -2770,13 +2797,20 @@ cancel_received_object (ECalBackendFile *cbfile, icalcomponent *icalcomp, gchar
 
 	rid = e_cal_component_get_recurid_as_string (comp);
 	if (rid && *rid) {
-		obj_data = remove_instance (cbfile, obj_data, uid, rid, CALOBJ_MOD_THIS, old_object, new_object, NULL);
-		if (obj_data && obj_data->full_object)
-			*new_object = e_cal_component_get_as_string (obj_data->full_object);
+		obj_data = remove_instance (cbfile, obj_data, uid, rid, CALOBJ_MOD_THIS,
+					    old_component, new_component, NULL);
+
+		if (obj_data && obj_data->full_object) {
+			if (*new_component)
+				g_object_unref (*new_component);
+
+			*new_component = g_object_ref (obj_data->full_object);
+		}
+
 	} else {
-		/* report as removal by keeping *new_object NULL */
+		/* report as removal by keeping *new_component NULL */
 		if (obj_data->full_object)
-			*old_object = e_cal_component_get_as_string (obj_data->full_object);
+			*old_component = g_object_ref (obj_data->full_object);
 		remove_component (cbfile, uid, obj_data);
 	}
 
@@ -2982,8 +3016,9 @@ e_cal_backend_file_receive_objects (ECalBackendSync *backend, EDataCal *cal, GCa
 	/* Now we manipulate the components we care about */
 	for (l = comps; l; l = l->next) {
 		const gchar *uid;
-		gchar *object, *old_object = NULL, *rid, *new_object;
+		gchar *rid;
 		ECalBackendFileObject *obj_data;
+		ECalComponent *old_component, *component;
 		gboolean is_declined;
 
 		subcomp = l->data;
@@ -3018,38 +3053,37 @@ e_cal_backend_file_receive_objects (ECalBackendSync *backend, EDataCal *cal, GCa
 			if (obj_data) {
 				if (rid) {
 					remove_instance (cbfile, obj_data, uid, rid, CALOBJ_MOD_THIS,
-							 &old_object, &new_object, NULL);
+							 &old_component, &component, NULL);
 				} else {
 					if (obj_data->full_object)
-						old_object = e_cal_component_get_as_string (obj_data->full_object);
+						old_component = g_object_ref (obj_data->full_object);
 					remove_component (cbfile, uid, obj_data);
 				}
 
 				if (!is_declined)
 					add_component (cbfile, comp, FALSE);
 
-				object = e_cal_component_get_as_string (comp);
-				if (!is_declined)
-					e_cal_backend_notify_object_modified (E_CAL_BACKEND (backend), old_object, object);
-				else {
+
+				if (!is_declined) {
+					e_cal_backend_notify_component_modified (E_CAL_BACKEND (backend), old_component, comp);
+
+				} else {
 					ECalComponentId *id = e_cal_component_get_id (comp);
 
 					if (rid)
-						e_cal_backend_notify_object_removed (E_CAL_BACKEND (backend), id, old_object, object);
+						e_cal_backend_notify_component_removed (E_CAL_BACKEND (backend), id, old_component, comp);
 					else
-						e_cal_backend_notify_object_removed (E_CAL_BACKEND (backend), id, old_object, NULL);
+						e_cal_backend_notify_component_removed (E_CAL_BACKEND (backend), id, old_component, NULL);
 
 					e_cal_component_free_id (id);
 				}
 
-				g_free (object);
-				g_free (old_object);
+				g_object_unref (old_component);
+				g_object_unref (component);
 			} else if (!is_declined) {
 				add_component (cbfile, comp, FALSE);
 
-				object = e_cal_component_get_as_string (comp);
-				e_cal_backend_notify_object_created (E_CAL_BACKEND (backend), object);
-				g_free (object);
+				e_cal_backend_notify_component_created (E_CAL_BACKEND (backend), comp);
 			}
 			g_free (rid);
 			break;
@@ -3070,22 +3104,23 @@ e_cal_backend_file_receive_objects (ECalBackendSync *backend, EDataCal *cal, GCa
 			goto error;
 			break;
 		case ICAL_METHOD_CANCEL:
-			old_object = NULL;
-			new_object = NULL;
-			if (cancel_received_object (cbfile, subcomp, &old_object, &new_object)) {
+			/* XXX */
+			old_component = component = NULL;
+
+			if (cancel_received_object (cbfile, subcomp, &old_component, &component)) {
 				ECalComponentId *id;
 
 				id = e_cal_component_get_id (comp);
 
-				e_cal_backend_notify_object_removed (E_CAL_BACKEND (backend), id, old_object, new_object);
+				e_cal_backend_notify_component_removed (E_CAL_BACKEND (backend), id, old_component, component);
 
 				/* remove the component from the toplevel VCALENDAR */
 				icalcomponent_remove_component (toplevel_comp, subcomp);
 				icalcomponent_free (subcomp);
 				e_cal_component_free_id (id);
 
-				g_free (new_object);
-				g_free (old_object);
+				g_object_unref (old_component);
+				g_object_unref (component);
 			}
 			g_free (rid);
 			break;
@@ -3351,7 +3386,7 @@ e_cal_backend_file_reload (ECalBackendFile *cbfile, GError **perror)
 static void
 test_query_by_scanning_all_objects (ECalBackendFile* cbfile, const gchar *sexp, GSList **objects)
 {
-	MatchObjectData match_data;
+	MatchObjectData match_data = { 0, };
 	ECalBackendFilePrivate *priv;
 
 	priv = cbfile->priv;
diff --git a/calendar/backends/http/e-cal-backend-http.c b/calendar/backends/http/e-cal-backend-http.c
index 97a8fc6..4865ec8 100644
--- a/calendar/backends/http/e-cal-backend-http.c
+++ b/calendar/backends/http/e-cal-backend-http.c
@@ -1210,14 +1210,14 @@ e_cal_backend_http_get_free_busy (ECalBackendSync *backend, EDataCal *cal, GCanc
 }
 
 static void
-e_cal_backend_http_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, gchar **new_calobj, GError **perror)
+e_cal_backend_http_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, ECalComponent **new_component, GError **perror)
 {
 	g_propagate_error (perror, EDC_ERROR (PermissionDenied));
 }
 
 static void
 e_cal_backend_http_modify_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj,
-				CalObjModType mod, gchar **old_object, gchar **new_object, GError **perror)
+				  CalObjModType mod, ECalComponent **old_component, ECalComponent **component, GError **perror)
 {
 	g_propagate_error (perror, EDC_ERROR (PermissionDenied));
 }
@@ -1225,11 +1225,10 @@ e_cal_backend_http_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
 /* Remove_object handler for the file backend */
 static void
 e_cal_backend_http_remove_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable,
-				const gchar *uid, const gchar *rid,
-				CalObjModType mod, gchar **old_object,
-				gchar **object, GError **perror)
+				  const gchar *uid, const gchar *rid, CalObjModType mod, 
+				  ECalComponent **old_component, ECalComponent **component, GError **perror)
 {
-	*old_object = *object = NULL;
+	*old_component = *component = NULL;
 
 	g_propagate_error (perror, EDC_ERROR (PermissionDenied));
 }
diff --git a/calendar/libedata-cal/e-cal-backend-sync.c b/calendar/libedata-cal/e-cal-backend-sync.c
index baf2602..5a25b51 100644
--- a/calendar/libedata-cal/e-cal-backend-sync.c
+++ b/calendar/libedata-cal/e-cal-backend-sync.c
@@ -265,18 +265,18 @@ e_cal_backend_sync_get_free_busy (ECalBackendSync *backend, EDataCal *cal, GCanc
  * @cancellable: a #GCancellable for the operation
  * @calobj: The object to be added.
  * @uid: Placeholder for server-generated UID.
- * @new_object: Placeholder for server-calobj, if it changed. Can be left as is if it's same as @calobj.
+ * @new_component: (out) (transfer full): Placeholder for returned #ECalComponent.
  * @error: Out parameter for a #GError.
  *
  * Calls the create_object_sync method on the given backend.
  */
 void
-e_cal_backend_sync_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, gchar **new_object, GError **error)
+e_cal_backend_sync_create_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, ECalComponent **new_component, GError **error)
 {
 	e_return_data_cal_error_if_fail (backend && E_IS_CAL_BACKEND_SYNC (backend), InvalidArg);
 	e_return_data_cal_error_if_fail (E_CAL_BACKEND_SYNC_GET_CLASS (backend)->create_object_sync != NULL, UnsupportedMethod);
 
-	LOCK_WRAPPER (create_object_sync, (backend, cal, cancellable, calobj, uid, new_object, error));
+	LOCK_WRAPPER (create_object_sync, (backend, cal, cancellable, calobj, uid, new_component, error));
 }
 
 /**
@@ -286,9 +286,9 @@ e_cal_backend_sync_create_object (ECalBackendSync *backend, EDataCal *cal, GCanc
  * @cancellable: a #GCancellable for the operation
  * @calobj: Object to be modified.
  * @mod: Type of modification to be done.
- * @old_object: Placeholder for returning the old object as it was stored on the
+ * @old_component: (out) (transfer full): Placeholder for returning the old component as it was stored on the
  * backend.
- * @new_object: Placeholder for returning the new object as it has been stored
+ * @new_component: (out) (transfer full): Placeholder for returning the new component as it has been stored
  * on the backend.
  * @error: Out parameter for a #GError.
  *
@@ -296,12 +296,12 @@ e_cal_backend_sync_create_object (ECalBackendSync *backend, EDataCal *cal, GCanc
  */
 void
 e_cal_backend_sync_modify_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj,
-				  CalObjModType mod, gchar **old_object, gchar **new_object, GError **error)
+				  CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **error)
 {
 	e_return_data_cal_error_if_fail (backend && E_IS_CAL_BACKEND_SYNC (backend), InvalidArg);
 	e_return_data_cal_error_if_fail (E_CAL_BACKEND_SYNC_GET_CLASS (backend)->modify_object_sync != NULL, UnsupportedMethod);
 
-	LOCK_WRAPPER (modify_object_sync, (backend, cal, cancellable, calobj, mod, old_object, new_object, error));
+	LOCK_WRAPPER (modify_object_sync, (backend, cal, cancellable, calobj, mod, old_component, new_component, error));
 }
 
 /**
@@ -313,23 +313,23 @@ e_cal_backend_sync_modify_object (ECalBackendSync *backend, EDataCal *cal, GCanc
  * @rid: Recurrence ID of the instance to remove, or NULL if removing the
  * whole object.
  * @mod: Type of removal.
- * @old_object: Placeholder for returning the old object as it was stored on the
+ * @old_component: (out) (transfer full): Placeholder for returning the old component as it was stored on the
  * backend.
- * @new_object: Placeholder for returning the object after it has been modified (when
- * removing individual instances). If removing the whole object, this will be
- * NULL.
+ * @new_component: (out) (transfer full): Placeholder for returning the new component as it has been stored
+ * on the backend (when removing individual instances). If removing the whole object,
+ * this will be set to %NULL.
  * @error: Out parameter for a #GError.
  *
  * Calls the remove_object_sync method on the given backend.
  */
 void
 e_cal_backend_sync_remove_object (ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid,
-				  CalObjModType mod, gchar **old_object, gchar **new_object, GError **error)
+				  CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **error)
 {
 	e_return_data_cal_error_if_fail (backend && E_IS_CAL_BACKEND_SYNC (backend), InvalidArg);
 	e_return_data_cal_error_if_fail (E_CAL_BACKEND_SYNC_GET_CLASS (backend)->remove_object_sync != NULL, UnsupportedMethod);
 
-	LOCK_WRAPPER (remove_object_sync, (backend, cal, cancellable, uid, rid, mod, old_object, new_object, error));
+	LOCK_WRAPPER (remove_object_sync, (backend, cal, cancellable, uid, rid, mod, old_component, new_component, error));
 }
 
 /**
@@ -597,46 +597,60 @@ static void
 cal_backend_create_object (ECalBackend *backend, EDataCal *cal, guint32 opid, GCancellable *cancellable, const gchar *calobj)
 {
 	GError *error = NULL;
-	gchar *uid = NULL, *new_object = NULL;
+	gchar *uid = NULL;
+	ECalComponent *new_component = NULL;
 
-	e_cal_backend_sync_create_object (E_CAL_BACKEND_SYNC (backend), cal, cancellable, calobj, &uid, &new_object, &error);
+	e_cal_backend_sync_create_object (E_CAL_BACKEND_SYNC (backend), cal, cancellable, calobj, &uid, &new_component, &error);
 
-	e_data_cal_respond_create_object (cal, opid, error, uid, new_object ? new_object : calobj);
+	if (!new_component)
+		new_component = e_cal_component_new_from_string (calobj);
+
+	e_data_cal_respond_create_object (cal, opid, error, uid, new_component);
 
 	g_free (uid);
-	g_free (new_object);
+	g_object_unref (new_component);
 }
 
 static void
 cal_backend_modify_object (ECalBackend *backend, EDataCal *cal, guint32 opid, GCancellable *cancellable, const gchar *calobj, CalObjModType mod)
 {
 	GError *error = NULL;
-	gchar *old_object = NULL, *new_object = NULL;
+	ECalComponent *old_component = NULL, *new_component = NULL;
+
+	e_cal_backend_sync_modify_object (E_CAL_BACKEND_SYNC (backend), cal, cancellable, calobj, mod, &old_component, &new_component, &error);
+
+	if (!old_component)
+		old_component = e_cal_component_new_from_string (calobj);
 
-	e_cal_backend_sync_modify_object (E_CAL_BACKEND_SYNC (backend), cal, cancellable, calobj, mod, &old_object, &new_object, &error);
+	e_data_cal_respond_modify_object (cal, opid, error, old_component, new_component);
 
-	e_data_cal_respond_modify_object (cal, opid, error, old_object ? old_object : calobj, new_object);
 
-	g_free (old_object);
-	g_free (new_object);
+	if (old_component)
+		g_object_unref (old_component);
+
+	if (new_component)
+		g_object_unref (new_component);
 }
 
 static void
 cal_backend_remove_object (ECalBackend *backend, EDataCal *cal, guint32 opid, GCancellable *cancellable, const gchar *uid, const gchar *rid, CalObjModType mod)
 {
 	GError *error = NULL;
-	gchar *old_object = NULL, *new_object = NULL;
+	ECalComponent *old_component = NULL, *new_component = NULL;
 	ECalComponentId compid;
 
 	compid.uid = (gchar *) uid;
 	compid.rid = (gchar *) ((mod == CALOBJ_MOD_THIS || mod == CALOBJ_MOD_ONLY_THIS) ? rid : NULL);
 
-	e_cal_backend_sync_remove_object (E_CAL_BACKEND_SYNC (backend), cal, cancellable, uid, rid, mod, &old_object, &new_object, &error);
+	e_cal_backend_sync_remove_object (E_CAL_BACKEND_SYNC (backend), cal, cancellable, uid, rid, mod, &old_component, &new_component, &error);
+
+	e_data_cal_respond_remove_object (cal, opid, error, &compid, old_component, new_component);
 
-	e_data_cal_respond_remove_object (cal, opid, error, &compid, old_object, new_object);
+	if (old_component)
+		g_object_unref (old_component);
 
-	g_free (old_object);
-	g_free (new_object);
+	if (new_component)
+		g_object_unref (new_component);
 }
 
 static void
diff --git a/calendar/libedata-cal/e-cal-backend-sync.h b/calendar/libedata-cal/e-cal-backend-sync.h
index 1b64a50..3878dce 100644
--- a/calendar/libedata-cal/e-cal-backend-sync.h
+++ b/calendar/libedata-cal/e-cal-backend-sync.h
@@ -39,9 +39,9 @@ struct _ECalBackendSyncClass {
 	void	(* get_object_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, gchar **calobj, GError **error);
 	void	(* get_object_list_sync)	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *sexp, GSList **calobjs, GError **error);
 	void	(* get_free_busy_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const GSList *users, time_t start, time_t end, GSList **freebusyobjs, GError **error);
-	void	(* create_object_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, gchar **new_object, GError **error);
-	void	(* modify_object_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, CalObjModType mod, gchar **old_object, gchar **new_object, GError **error);
-	void	(* remove_object_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, CalObjModType mod, gchar **old_object, gchar **new_object, GError **error);
+	void	(* create_object_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, ECalComponent **new_component, GError **error);
+	void	(* modify_object_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **error);
+	void	(* remove_object_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **error);
 	void	(* receive_objects_sync)	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, GError **error);
 	void	(* send_objects_sync)		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, GSList **users, gchar **modified_calobj, GError **error);
 	void	(* get_attachment_uris_sync)	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, GSList **attachments, GError **error);
@@ -64,9 +64,9 @@ gboolean e_cal_backend_sync_set_backend_property (ECalBackendSync *backend, EDat
 void	e_cal_backend_sync_get_object		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, gchar **calobj, GError **error);
 void	e_cal_backend_sync_get_object_list	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *sexp, GSList **calobjs, GError **error);
 void	e_cal_backend_sync_get_free_busy	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const GSList *users, time_t start, time_t end, GSList **freebusyobjs, GError **error);
-void	e_cal_backend_sync_create_object	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, gchar **new_object, GError **error);
-void	e_cal_backend_sync_modify_object	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, CalObjModType mod, gchar **old_object, gchar **new_object, GError **error);
-void	e_cal_backend_sync_remove_object	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, CalObjModType mod, gchar **old_object, gchar **new_object, GError **error);
+void	e_cal_backend_sync_create_object	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, gchar **uid, ECalComponent **new_component, GError **error);
+void	e_cal_backend_sync_modify_object	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **error);
+void	e_cal_backend_sync_remove_object	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, CalObjModType mod, ECalComponent **old_component, ECalComponent **new_component, GError **error);
 void	e_cal_backend_sync_receive_objects	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, GError **error);
 void	e_cal_backend_sync_send_objects		(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *calobj, GSList **users, gchar **modified_calobj, GError **error);
 void	e_cal_backend_sync_get_attachment_uris	(ECalBackendSync *backend, EDataCal *cal, GCancellable *cancellable, const gchar *uid, const gchar *rid, GSList **attachments, GError **error);
diff --git a/calendar/libedata-cal/e-cal-backend.c b/calendar/libedata-cal/e-cal-backend.c
index 3a6d6fc..6d37bb1 100644
--- a/calendar/libedata-cal/e-cal-backend.c
+++ b/calendar/libedata-cal/e-cal-backend.c
@@ -1437,8 +1437,202 @@ e_cal_backend_stop_view (ECalBackend *backend, EDataCalView *view)
 }
 
 static gboolean
-object_created_cb (EDataCalView *view, gpointer calobj)
+component_created_cb (EDataCalView *view, gpointer data)
 {
+	ECalComponent *component = (ECalComponent *)data;
+
+	if (e_data_cal_view_component_matches (view, component))
+		e_data_cal_view_notify_components_added_1 (view, component);
+
+	return TRUE;
+}
+
+/**
+ * e_cal_backend_notify_component_created:
+ * @backend: an #ECalBackend
+ * @component: the newly created #ECalComponent
+ *
+ * Notifies each of the backend's listeners about a new object.
+ *
+ * Like e_cal_backend_notify_object_created() except takes an #ECalComponent
+ * instead of an ical string representation and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ **/
+void
+e_cal_backend_notify_component_created (ECalBackend *backend, ECalComponent *component)
+{
+	ECalBackendPrivate *priv;
+
+	priv = backend->priv;
+
+	if (priv->notification_proxy) {
+		e_cal_backend_notify_component_created (priv->notification_proxy, component);
+		return;
+	}
+
+	e_cal_backend_foreach_view (backend, component_created_cb, (gpointer) component);
+}
+
+/**
+ * e_cal_backend_notify_components_added:
+ *
+ * Like e_cal_backend_notify_objects_added() except take a list of #ECalComponents
+ * instead of ical string representations and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ **/
+void
+e_cal_backend_notify_components_added (ECalBackend *backend, EDataCalView *view, const GSList *objects)
+{
+	e_data_cal_view_notify_components_added (view, objects);
+}
+
+static void
+match_view_and_notify_component (EDataCalView *view, ECalComponent *old_component, ECalComponent *component)
+{
+	gboolean old_match = FALSE, new_match = FALSE;
+
+	if (old_component)
+		old_match = e_data_cal_view_component_matches (view, old_component);
+
+	new_match = e_data_cal_view_component_matches (view, component);
+	if (old_match && new_match)
+		e_data_cal_view_notify_components_modified_1 (view, component);
+	else if (new_match)
+		e_data_cal_view_notify_components_added_1 (view, component);
+	else if (old_match) {
+
+		ECalComponentId *id = e_cal_component_get_id (old_component);
+
+		e_data_cal_view_notify_objects_removed_1 (view, id);
+
+		e_cal_component_free_id (id);
+	}
+}
+
+struct component_call_data {
+	ECalComponent         *old_component;
+	ECalComponent         *component;
+	const ECalComponentId *id;
+};
+
+static gboolean
+call_match_and_notify_component (EDataCalView *view, gpointer user_data)
+{
+	struct component_call_data *cd = user_data;
+
+	g_return_val_if_fail (user_data != NULL, FALSE);
+
+	match_view_and_notify_component (view, cd->old_component, cd->component);
+
+	return TRUE;
+}
+
+/**
+ * e_cal_backend_notify_component_modified:
+ * @backend: an #ECalBackend
+ * @old_component: the #ECalComponent before the modification
+ * @component: the #ECalComponent after the modification
+ *
+ * Notifies each of the backend's listeners about a modified object.
+ *
+ * Like e_cal_backend_notify_object_modified() except takes an #ECalComponent
+ * instead of an ical string representation and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ **/
+void
+e_cal_backend_notify_component_modified (ECalBackend   *backend,
+					 ECalComponent *old_component,
+					 ECalComponent *component)
+{
+	ECalBackendPrivate *priv;
+	struct component_call_data cd;
+
+	priv = backend->priv;
+
+	if (priv->notification_proxy) {
+		e_cal_backend_notify_component_modified (priv->notification_proxy, old_component, component);
+		return;
+	}
+
+	cd.old_component = old_component;
+	cd.component     = component;
+	cd.id            = NULL;
+
+	e_cal_backend_foreach_view (backend, call_match_and_notify_component, &cd);
+}
+
+/**
+ * e_cal_backend_notify_components_modified:
+ *
+ * Like e_cal_backend_notify_objects_modified() except takes a list of #ECalComponents
+ * instead of a ical string representations and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ **/
+void
+e_cal_backend_notify_components_modified (ECalBackend *backend, EDataCalView *view, const GSList *objects)
+{
+	e_data_cal_view_notify_components_modified (view, objects);
+}
+
+static gboolean
+component_removed_cb (EDataCalView *view, gpointer user_data)
+{
+	struct component_call_data *cd = user_data;
+
+	g_return_val_if_fail (user_data != NULL, FALSE);
+
+	if (cd->component == NULL) {
+		/* if object == NULL, it means the object has been completely
+		   removed from the backend */
+		if (!cd->old_component || e_data_cal_view_component_matches (view, cd->old_component))
+			e_data_cal_view_notify_objects_removed_1 (view, cd->id);
+	} else
+		match_view_and_notify_component (view, cd->old_component, cd->component);
+
+	return TRUE;
+}
+
+/**
+ * e_cal_backend_notify_component_removed:
+ * @backend: an #ECalBackend
+ * @id: the Id of the removed object
+ * @old_component: the removed component
+ * @component: the component after the removal. This only applies to recurrent 
+ * appointments that had an instance removed. In that case, this function notifies a 
+ * modification instead of a removal.
+ *
+ * Notifies each of the backend's listeners about a removed object.
+ *
+ * Like e_cal_backend_notify_objects_added() except take an #ECalComponent
+ * instead of an ical string representation and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ **/
+void
+e_cal_backend_notify_component_removed (ECalBackend *backend, const ECalComponentId *id,
+					ECalComponent *old_component, ECalComponent *component)
+{
+	ECalBackendPrivate *priv;
+	struct component_call_data cd;
+
+	priv = backend->priv;
+
+	if (priv->notification_proxy) {
+		e_cal_backend_notify_component_removed (priv->notification_proxy, id, old_component, component);
+		return;
+	}
+
+	cd.old_component = old_component;
+	cd.component = component;
+	cd.id = id;
+
+	e_cal_backend_foreach_view (backend, component_removed_cb, &cd);
+}
+
+static gboolean
+object_created_cb (EDataCalView *view, gpointer data)
+{
+	const gchar *calobj = data;
+
 	if (e_data_cal_view_object_matches (view, calobj))
 		e_data_cal_view_notify_objects_added_1 (view, calobj);
 
@@ -1448,7 +1642,7 @@ object_created_cb (EDataCalView *view, gpointer calobj)
 /**
  * e_cal_backend_notify_object_created:
  * @backend: an #ECalBackend
- * @calobj: iCalendar representation of new object
+ * @calobj: the newly created object
  *
  * Notifies each of the backend's listeners about a new object.
  *
@@ -1474,7 +1668,6 @@ e_cal_backend_notify_object_created (ECalBackend *backend, const gchar *calobj)
 /**
  * e_cal_backend_notify_objects_added:
  *
- * Since: 2.24
  **/
 void
 e_cal_backend_notify_objects_added (ECalBackend *backend, EDataCalView *view, const GSList *objects)
@@ -1483,7 +1676,7 @@ e_cal_backend_notify_objects_added (ECalBackend *backend, EDataCalView *view, co
 }
 
 static void
-match_view_and_notify (EDataCalView *view, const gchar *old_object, const gchar *object)
+match_view_and_notify_object (EDataCalView *view, const gchar *old_object, const gchar *object)
 {
 	gboolean old_match = FALSE, new_match = FALSE;
 
@@ -1510,20 +1703,20 @@ match_view_and_notify (EDataCalView *view, const gchar *old_object, const gchar
 	}
 }
 
-struct call_data {
+struct object_call_data {
 	const gchar *old_object;
 	const gchar *object;
 	const ECalComponentId *id;
 };
 
 static gboolean
-call_match_and_notify (EDataCalView *view, gpointer user_data)
+call_match_and_notify_object (EDataCalView *view, gpointer user_data)
 {
-	struct call_data *cd = user_data;
+	struct object_call_data *cd = user_data;
 
 	g_return_val_if_fail (user_data != NULL, FALSE);
 
-	match_view_and_notify (view, cd->old_object, cd->object);
+	match_view_and_notify_object (view, cd->old_object, cd->object);
 
 	return TRUE;
 }
@@ -1544,7 +1737,7 @@ void
 e_cal_backend_notify_object_modified (ECalBackend *backend, const gchar *old_object, const gchar *object)
 {
 	ECalBackendPrivate *priv;
-	struct call_data cd;
+	struct object_call_data cd;
 
 	priv = backend->priv;
 
@@ -1557,7 +1750,7 @@ e_cal_backend_notify_object_modified (ECalBackend *backend, const gchar *old_obj
 	cd.object = object;
 	cd.id = NULL;
 
-	e_cal_backend_foreach_view (backend, call_match_and_notify, &cd);
+	e_cal_backend_foreach_view (backend, call_match_and_notify_object, &cd);
 }
 
 /**
@@ -1574,7 +1767,7 @@ e_cal_backend_notify_objects_modified (ECalBackend *backend, EDataCalView *view,
 static gboolean
 object_removed_cb (EDataCalView *view, gpointer user_data)
 {
-	struct call_data *cd = user_data;
+	struct object_call_data *cd = user_data;
 
 	g_return_val_if_fail (user_data != NULL, FALSE);
 
@@ -1584,7 +1777,7 @@ object_removed_cb (EDataCalView *view, gpointer user_data)
 		if (!cd->old_object || e_data_cal_view_object_matches (view, cd->old_object))
 			e_data_cal_view_notify_objects_removed_1 (view, cd->id);
 	} else
-		match_view_and_notify (view, cd->old_object, cd->object);
+		match_view_and_notify_object (view, cd->old_object, cd->object);
 
 	return TRUE;
 }
@@ -1609,7 +1802,7 @@ e_cal_backend_notify_object_removed (ECalBackend *backend, const ECalComponentId
 				     const gchar *old_object, const gchar *object)
 {
 	ECalBackendPrivate *priv;
-	struct call_data cd;
+	struct object_call_data cd;
 
 	priv = backend->priv;
 
diff --git a/calendar/libedata-cal/e-cal-backend.h b/calendar/libedata-cal/e-cal-backend.h
index f9f0da7..225f277 100644
--- a/calendar/libedata-cal/e-cal-backend.h
+++ b/calendar/libedata-cal/e-cal-backend.h
@@ -150,10 +150,18 @@ void            e_cal_backend_get_revision              (ECalBackend *backend, E
 void		e_cal_backend_start_view		(ECalBackend *backend, EDataCalView *view);
 void		e_cal_backend_stop_view			(ECalBackend *backend, EDataCalView *view);
 
+void		e_cal_backend_notify_component_created	(ECalBackend *backend, ECalComponent *component);
+void		e_cal_backend_notify_components_added	(ECalBackend *backend, EDataCalView *view, const GSList *components);
+void		e_cal_backend_notify_component_modified	(ECalBackend *backend, ECalComponent *old_component, ECalComponent *new_component);
+void		e_cal_backend_notify_components_modified(ECalBackend *backend, EDataCalView *view, const GSList *components);
+
+void		e_cal_backend_notify_component_removed	(ECalBackend *backend, const ECalComponentId *id, ECalComponent *old_component, ECalComponent *component);
+
 void		e_cal_backend_notify_object_created	(ECalBackend *backend, const gchar *calobj);
 void		e_cal_backend_notify_objects_added	(ECalBackend *backend, EDataCalView *view, const GSList *objects);
 void		e_cal_backend_notify_object_modified	(ECalBackend *backend, const gchar *old_object, const gchar *object);
 void		e_cal_backend_notify_objects_modified	(ECalBackend *backend, EDataCalView *view, const GSList *objects);
+
 void		e_cal_backend_notify_object_removed	(ECalBackend *backend, const ECalComponentId *id, const gchar *old_object, const gchar *object);
 void		e_cal_backend_notify_objects_removed	(ECalBackend *backend, EDataCalView *view, const GSList *ids);
 
diff --git a/calendar/libedata-cal/e-data-cal-view.c b/calendar/libedata-cal/e-data-cal-view.c
index 479692e..b8c2bfb 100644
--- a/calendar/libedata-cal/e-data-cal-view.c
+++ b/calendar/libedata-cal/e-data-cal-view.c
@@ -286,6 +286,29 @@ notify_add (EDataCalView *view, gchar *obj)
 }
 
 static void
+notify_add_component (EDataCalView *view, ECalComponent *comp)
+{
+	EDataCalViewPrivate *priv = view->priv;
+	gchar               *obj;
+
+	obj = e_data_cal_view_get_component_string (view, comp);
+
+	send_pending_changes (view);
+	send_pending_removes (view);
+
+	if (priv->adds->len == THRESHOLD_ITEMS) {
+		send_pending_adds (view);
+	}
+	g_array_append_val (priv->adds, obj);
+
+	g_hash_table_insert (priv->ids,
+			     e_cal_component_get_id (comp),
+			     GUINT_TO_POINTER (1));
+
+	ensure_pending_flush_timeout (view);
+}
+
+static void
 notify_change (EDataCalView *view, gchar *obj)
 {
 	EDataCalViewPrivate *priv = view->priv;
@@ -303,6 +326,16 @@ notify_change (EDataCalView *view, gchar *obj)
 }
 
 static void
+notify_change_component (EDataCalView *view, ECalComponent *comp)
+{
+	gchar *obj;
+
+	obj = e_data_cal_view_get_component_string (view, comp);
+
+	notify_change (view, obj);
+}
+
+static void
 notify_remove (EDataCalView *view, ECalComponentId *id)
 {
 	EDataCalViewPrivate *priv = view->priv;
@@ -624,7 +657,7 @@ e_data_cal_view_get_object_sexp (EDataCalView *view)
 /**
  * e_data_cal_view_object_matches:
  * @view: A view object.
- * @object: Object to match.
+ * @object: Object to match..
  *
  * Compares the given @object to the regular expression used for the
  * given view.
@@ -646,6 +679,30 @@ e_data_cal_view_object_matches (EDataCalView *view, const gchar *object)
 }
 
 /**
+ * e_data_cal_view_component_matches:
+ * @view: A view object.
+ * @component: the #ECalComponent object to match.
+ *
+ * Compares the given @component to the regular expression used for the
+ * given view.
+ *
+ * Returns: TRUE if the object matches the expression, FALSE if not.
+ */
+gboolean
+e_data_cal_view_component_matches (EDataCalView *view, ECalComponent *component)
+{
+	EDataCalViewPrivate *priv;
+
+	g_return_val_if_fail (view != NULL, FALSE);
+	g_return_val_if_fail (E_IS_DATA_CAL_VIEW (view), FALSE);
+	g_return_val_if_fail (E_IS_CAL_COMPONENT (component), FALSE);
+
+	priv = view->priv;
+
+	return e_cal_backend_sexp_match_comp (priv->sexp, component, priv->backend);
+}
+
+/**
  * e_data_cal_view_is_started:
  * @view: A view object.
  *
@@ -718,12 +775,240 @@ e_data_cal_view_get_fields_of_interest (EDataCalView *view)
 	return view->priv->fields_of_interest;
 }
 
+
+
+static gboolean
+filter_component (icalcomponent *icomponent, GHashTable *fields_of_interest, GString *string)
+{
+	gchar             *str;
+
+	/* RFC 2445 explicitly says that the newline is *ALWAYS* a \r\n (CRLF)!!!! */
+	const gchar        newline[] = "\r\n";
+	
+	icalcomponent_kind kind;
+	const gchar       *kind_string;
+	icalproperty      *prop;
+	icalcomponent     *icomp;
+	gboolean           fail = FALSE;
+
+	/* Open iCalendar string */
+	g_string_append (string, "BEGIN:");
+
+	kind = icalcomponent_isa (icomponent);
+
+	/* if (kind != ICAL_X_COMPONENT) { */
+	/* 	kind_string  = icalcomponent_kind_to_string (kind); */
+	/* } else { */
+	/* 	kind_string = icomponent->x_name; */
+	/* } */
+
+	kind_string  = icalcomponent_kind_to_string (kind);
+
+	g_string_append (string, kind_string);
+	g_string_append (string, newline);
+
+	for (prop = icalcomponent_get_first_property (icomponent, ICAL_ANY_PROPERTY);
+	     prop;
+	     prop = icalcomponent_get_next_property (icomponent, ICAL_ANY_PROPERTY)) {
+		const gchar *name;
+		gboolean     is_field_of_interest;
+
+		name = icalproperty_get_property_name (prop);
+
+		if (!name) {
+			g_warning ("NULL ical property name encountered while serializing component");
+			fail = TRUE;
+			break;
+		}
+
+		is_field_of_interest = GPOINTER_TO_INT (g_hash_table_lookup (fields_of_interest, name));
+
+		/* Append any name that is mentioned in the fields-of-interest */
+		if (is_field_of_interest) {
+			str = icalproperty_as_ical_string_r (prop);
+			g_string_append (string, str);
+			g_free (str);
+		}
+	}
+
+	for (icomp = icalcomponent_get_first_component (icomponent, ICAL_ANY_COMPONENT);
+	     fail == FALSE && icomp;
+	     icomp = icalcomponent_get_next_component (icomponent, ICAL_ANY_COMPONENT)) {
+		
+		if (!filter_component (icomp, fields_of_interest, string)) {
+			fail = TRUE;
+			break;
+		}
+	}
+
+	g_string_append (string, "END:");
+	g_string_append (string, icalcomponent_kind_to_string (kind));
+	g_string_append (string, newline);
+
+	return fail == FALSE;
+}
+
+/**
+ * e_data_cal_view_get_component_string:
+ * @view: A view object.
+ * @component: The #ECalComponent to get the string for.
+ *
+ * This function is similar to e_cal_component_get_as_string() except
+ * that it takes into account the fields-of-interest that @view is 
+ * configured with and filters out any unneeded fields.
+ *
+ * Returns: (transfer full): A newly allocated string representation of @component suitable for @view.
+ */
+gchar *
+e_data_cal_view_get_component_string (EDataCalView *view, ECalComponent *component)
+{
+	GString *string;
+	icalcomponent *icomponent;
+
+	g_return_val_if_fail (E_IS_DATA_CAL_VIEW (view), NULL);
+	g_return_val_if_fail (E_IS_CAL_COMPONENT (component), NULL);
+
+	if (!view->priv->fields_of_interest)
+		return e_cal_component_get_as_string (component);
+
+	string     = g_string_new ("");
+	icomponent = e_cal_component_get_icalcomponent (component);
+
+	if (filter_component (icomponent, view->priv->fields_of_interest, string)) {
+		return g_string_free (string, FALSE);
+	}
+
+	g_string_free (string, TRUE);
+
+	/* If an error occured, fall back to reporting the full component */
+	return e_cal_component_get_as_string (component);
+}
+
+/**
+ * e_data_cal_view_notify_components_added:
+ * @view: A view object.
+ * @components: List of components that have been added.
+ *
+ * Notifies all view listeners of the addition of a list of components.
+ *
+ * Like e_data_cal_view_notify_objects_added() except takes a list
+ * of #ECalComponents instead of ical string representations and uses the 
+ * #EDataCalView's fields-of-interest to filter out unwanted information 
+ * from ical strings sent over the bus.
+ */
+void
+e_data_cal_view_notify_components_added (EDataCalView *view, const GSList *components)
+{
+	EDataCalViewPrivate *priv;
+	const GSList *l;
+
+	g_return_if_fail (view && E_IS_DATA_CAL_VIEW (view));
+	priv = view->priv;
+
+	if (components == NULL)
+		return;
+
+	g_mutex_lock (priv->pending_mutex);
+
+	for (l = components; l; l = l->next) {
+		ECalComponent *comp = l->data;
+
+		notify_add_component (view, comp);
+	}
+
+	g_mutex_unlock (priv->pending_mutex);
+}
+
+/**
+ * e_data_cal_view_notify_components_added_1:
+ * @view: A view object.
+ * @component: The #ECalComponent that has been added.
+ *
+ * Notifies all the view listeners of the addition of a single object.
+ *
+ * Like e_data_cal_view_notify_objects_added_1() except takes an #ECalComponent
+ * instead of an ical string representation and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ */
+void
+e_data_cal_view_notify_components_added_1 (EDataCalView *view, ECalComponent *component)
+{
+	GSList l = {NULL,};
+
+	g_return_if_fail (E_IS_DATA_CAL_VIEW (view));
+	g_return_if_fail (E_IS_CAL_COMPONENT (component));
+
+	l.data = (gpointer) component;
+	e_data_cal_view_notify_components_added (view, &l);
+}
+
+/**
+ * e_data_cal_view_notify_components_modified:
+ * @view: A view object.
+ * @components: List of modified components.
+ *
+ * Notifies all view listeners of the modification of a list of components.
+ *
+ * Like e_data_cal_view_notify_objects_modified() except takes a list of #ECalComponents
+ * instead of a ical string representations and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ */
+void
+e_data_cal_view_notify_components_modified (EDataCalView *view, const GSList *components)
+{
+	EDataCalViewPrivate *priv;
+	const GSList *l;
+
+	g_return_if_fail (view && E_IS_DATA_CAL_VIEW (view));
+	priv = view->priv;
+
+	if (components == NULL)
+		return;
+
+	g_mutex_lock (priv->pending_mutex);
+
+	for (l = components; l; l = l->next) {
+		/* TODO: send add/remove/change as relevant, based on ->ids */
+		ECalComponent *comp = l->data;
+
+		notify_change_component (view, comp);
+	}
+
+	g_mutex_unlock (priv->pending_mutex);
+}
+
+/**
+ * e_data_cal_view_notify_components_modified_1:
+ * @view: A view object.
+ * @component: The modified #ECalComponent.
+ *
+ * Notifies all view listeners of the modification of @component.
+ * 
+ * Like e_data_cal_view_notify_objects_modified_1() except takes an #ECalComponent
+ * instead of an ical string representation and uses the #EDataCalView's fields-of-interest
+ * to filter out unwanted information from ical strings sent over the bus.
+ */
+void
+e_data_cal_view_notify_components_modified_1 (EDataCalView *view, ECalComponent *component)
+{
+	GSList l = {NULL,};
+
+	g_return_if_fail (E_IS_DATA_CAL_VIEW (view));
+	g_return_if_fail (E_IS_CAL_COMPONENT (component));
+
+	l.data = (gpointer) component;
+	e_data_cal_view_notify_components_modified (view, &l);
+}
+
 /**
  * e_data_cal_view_notify_objects_added:
  * @view: A view object.
  * @objects: List of objects that have been added.
  *
  * Notifies all view listeners of the addition of a list of objects.
+ *
+ * If possible e_data_cal_view_notify_components_added() should be used
+ * instead.
  */
 void
 e_data_cal_view_notify_objects_added (EDataCalView *view, const GSList *objects)
@@ -752,6 +1037,9 @@ e_data_cal_view_notify_objects_added (EDataCalView *view, const GSList *objects)
  * @object: The object that has been added.
  *
  * Notifies all the view listeners of the addition of a single object.
+ *
+ * If possible e_data_cal_view_notify_components_added_1() should be used
+ * instead.
  */
 void
 e_data_cal_view_notify_objects_added_1 (EDataCalView *view, const gchar *object)
@@ -771,6 +1059,9 @@ e_data_cal_view_notify_objects_added_1 (EDataCalView *view, const gchar *object)
  * @objects: List of modified objects.
  *
  * Notifies all view listeners of the modification of a list of objects.
+ *
+ * If possible e_data_cal_view_notify_components_modified() should be used
+ * instead.
  */
 void
 e_data_cal_view_notify_objects_modified (EDataCalView *view, const GSList *objects)
@@ -800,6 +1091,9 @@ e_data_cal_view_notify_objects_modified (EDataCalView *view, const GSList *objec
  * @object: The modified object.
  *
  * Notifies all view listeners of the modification of a single object.
+ *
+ * If possible e_data_cal_view_notify_components_modified_1() should be used
+ * instead.
  */
 void
 e_data_cal_view_notify_objects_modified_1 (EDataCalView *view, const gchar *object)
diff --git a/calendar/libedata-cal/e-data-cal-view.h b/calendar/libedata-cal/e-data-cal-view.h
index 06a0f2e..c95bc5e 100644
--- a/calendar/libedata-cal/e-data-cal-view.h
+++ b/calendar/libedata-cal/e-data-cal-view.h
@@ -52,11 +52,19 @@ guint			e_data_cal_view_register_gdbus_object		(EDataCalView *view, GDBusConnect
 const gchar *		e_data_cal_view_get_text			(EDataCalView *view);
 ECalBackendSExp *	e_data_cal_view_get_object_sexp			(EDataCalView *view);
 gboolean		e_data_cal_view_object_matches			(EDataCalView *view, const gchar *object);
+gboolean		e_data_cal_view_component_matches		(EDataCalView *view, ECalComponent *component);
 gboolean		e_data_cal_view_is_started			(EDataCalView *view);
 gboolean		e_data_cal_view_is_completed			(EDataCalView *view);
 gboolean		e_data_cal_view_is_stopped			(EDataCalView *view);
 GHashTable *		e_data_cal_view_get_fields_of_interest		(EDataCalView *view);
 
+gchar                  *e_data_cal_view_get_component_string            (EDataCalView *view, ECalComponent *component);
+
+void			e_data_cal_view_notify_components_added	        (EDataCalView *view, const GSList *objects);
+void			e_data_cal_view_notify_components_added_1       (EDataCalView *view, ECalComponent *component);
+void			e_data_cal_view_notify_components_modified      (EDataCalView *view, const GSList *objects);
+void			e_data_cal_view_notify_components_modified_1    (EDataCalView *view, ECalComponent *component);
+
 void			e_data_cal_view_notify_objects_added		(EDataCalView *view, const GSList *objects);
 void			e_data_cal_view_notify_objects_added_1		(EDataCalView *view, const gchar *object);
 void			e_data_cal_view_notify_objects_modified		(EDataCalView *view, const GSList *objects);
diff --git a/calendar/libedata-cal/e-data-cal.c b/calendar/libedata-cal/e-data-cal.c
index 0574158..67230cb 100644
--- a/calendar/libedata-cal/e-data-cal.c
+++ b/calendar/libedata-cal/e-data-cal.c
@@ -1102,13 +1102,13 @@ e_data_cal_respond_get_free_busy (EDataCal *cal, guint32 opid, GError *error)
  * @cal: A calendar client interface.
  * @error: Operation error, if any, automatically freed if passed it.
  * @uid: UID of the object created.
- * @object: The object created as an iCalendar string.
+ * @component: The newly created #ECalComponent.
  *
  * Notifies listeners of the completion of the create_object method call.
  */
 void
 e_data_cal_respond_create_object (EDataCal *cal, guint32 opid, GError *error,
-				  const gchar *uid, const gchar *object)
+				  const gchar *uid, ECalComponent *component)
 {
 	gchar *gdbus_uid = NULL;
 
@@ -1123,7 +1123,7 @@ e_data_cal_respond_create_object (EDataCal *cal, guint32 opid, GError *error,
 	if (error)
 		g_error_free (error);
 	else
-		e_cal_backend_notify_object_created (cal->priv->backend, object);
+		e_cal_backend_notify_component_created (cal->priv->backend, component);
 }
 
 /**
@@ -1137,7 +1137,7 @@ e_data_cal_respond_create_object (EDataCal *cal, guint32 opid, GError *error,
  */
 void
 e_data_cal_respond_modify_object (EDataCal *cal, guint32 opid, GError *error,
-				  const gchar *old_object, const gchar *object)
+				  ECalComponent *old_component, ECalComponent *component)
 {
 	op_complete (cal, opid);
 
@@ -1149,7 +1149,7 @@ e_data_cal_respond_modify_object (EDataCal *cal, guint32 opid, GError *error,
 	if (error)
 		g_error_free (error);
 	else
-		e_cal_backend_notify_object_modified (cal->priv->backend, old_object, object);
+		e_cal_backend_notify_component_modified (cal->priv->backend, old_component, component);
 }
 
 /**
@@ -1157,15 +1157,16 @@ e_data_cal_respond_modify_object (EDataCal *cal, guint32 opid, GError *error,
  * @cal: A calendar client interface.
  * @error: Operation error, if any, automatically freed if passed it.
  * @uid: UID of the removed object.
- * @old_object: The old object as an iCalendar string.
- * @object: The new object as an iCalendar string. This will not be NULL only
+ * @old_component: The old #ECalComponent.
+ * @component: The new #ECalComponent. This will not be NULL only
  * when removing instances of a recurring appointment.
  *
  * Notifies listeners of the completion of the remove_object method call.
  */
 void
 e_data_cal_respond_remove_object (EDataCal *cal, guint32 opid, GError *error,
-				  const ECalComponentId *id, const gchar *old_object, const gchar *object)
+				  const ECalComponentId *id,
+				  ECalComponent *old_component, ECalComponent *component)
 {
 	op_complete (cal, opid);
 
@@ -1177,7 +1178,7 @@ e_data_cal_respond_remove_object (EDataCal *cal, guint32 opid, GError *error,
 	if (error)
 		g_error_free (error);
 	else
-		e_cal_backend_notify_object_removed (cal->priv->backend, id, old_object, object);
+		e_cal_backend_notify_component_removed (cal->priv->backend, id, old_component, component);
 }
 
 /**
diff --git a/calendar/libedata-cal/e-data-cal.h b/calendar/libedata-cal/e-data-cal.h
index c7f5ef6..265eb72 100644
--- a/calendar/libedata-cal/e-data-cal.h
+++ b/calendar/libedata-cal/e-data-cal.h
@@ -137,9 +137,9 @@ void		e_data_cal_respond_set_backend_property		(EDataCal *cal, guint32 opid, GEr
 void		e_data_cal_respond_get_object			(EDataCal *cal, guint32 opid, GError *error, const gchar *object);
 void		e_data_cal_respond_get_object_list		(EDataCal *cal, guint32 opid, GError *error, const GSList *objects);
 void		e_data_cal_respond_get_free_busy		(EDataCal *cal, guint32 opid, GError *error);
-void		e_data_cal_respond_create_object		(EDataCal *cal, guint32 opid, GError *error, const gchar *uid, const gchar *object);
-void		e_data_cal_respond_modify_object		(EDataCal *cal, guint32 opid, GError *error, const gchar *old_object, const gchar *object);
-void		e_data_cal_respond_remove_object		(EDataCal *cal, guint32 opid, GError *error, const ECalComponentId *id, const gchar *old_object, const gchar *object);
+void		e_data_cal_respond_create_object		(EDataCal *cal, guint32 opid, GError *error, const gchar *uid, ECalComponent *component);
+void		e_data_cal_respond_modify_object		(EDataCal *cal, guint32 opid, GError *error, ECalComponent *old_component, ECalComponent *component);
+void		e_data_cal_respond_remove_object		(EDataCal *cal, guint32 opid, GError *error, const ECalComponentId *id, ECalComponent *old_component, ECalComponent *component);
 void		e_data_cal_respond_receive_objects		(EDataCal *cal, guint32 opid, GError *error);
 void		e_data_cal_respond_send_objects			(EDataCal *cal, guint32 opid, GError *error, const GSList *users, const gchar *calobj);
 void		e_data_cal_respond_get_attachment_uris		(EDataCal *cal, guint32 opid, GError *error, const GSList *attachments);