[evolution/account-mgmt: 46/54] Adapt itip-formatter plugin to the new ESource API.



commit 4da6915e65b7f6f7131f81303cf3406f3688b544
Author: Matthew Barnes <mbarnes redhat com>
Date:   Sat Sep 24 09:48:52 2011 -0400

    Adapt itip-formatter plugin to the new ESource API.

 plugins/itip-formatter/Makefile.am                 |   62 ++-
 .../itip-formatter/e-conflict-search-selector.c    |   98 +++
 .../itip-formatter/e-conflict-search-selector.h    |   64 ++
 plugins/itip-formatter/e-source-conflict-search.c  |  151 +++++
 plugins/itip-formatter/e-source-conflict-search.h  |   86 +++
 plugins/itip-formatter/itip-formatter.c            |  653 ++++++++++----------
 plugins/itip-formatter/itip-view.c                 |  606 ++++++++++++-------
 plugins/itip-formatter/itip-view.h                 |   17 +-
 8 files changed, 1172 insertions(+), 565 deletions(-)
---
diff --git a/plugins/itip-formatter/Makefile.am b/plugins/itip-formatter/Makefile.am
index e0672eb..af8f6c8 100644
--- a/plugins/itip-formatter/Makefile.am
+++ b/plugins/itip-formatter/Makefile.am
@@ -1,32 +1,45 @@
+NULL =
+
 @EVO_PLUGIN_RULE@
 
 plugin_DATA = org-gnome-itip-formatter.eplug
 plugin_LTLIBRARIES = liborg-gnome-itip-formatter.la
 
-liborg_gnome_itip_formatter_la_CPPFLAGS =		\
-	$(AM_CPPFLAGS)					\
-	-I$(top_srcdir)					\
-	-I$(top_srcdir)/widgets				\
-	-DEVOLUTION_PRIVDATADIR=\""$(privdatadir)"\"	\
-	$(EVOLUTION_DATA_SERVER_CFLAGS)			\
-	$(GNOME_PLATFORM_CFLAGS)
-
-liborg_gnome_itip_formatter_la_SOURCES = itip-formatter.c itip-view.c itip-view.h
-
-liborg_gnome_itip_formatter_la_LDFLAGS = -module -avoid-version $(NO_UNDEFINED)
-
-liborg_gnome_itip_formatter_la_LIBADD =				\
-	$(top_builddir)/e-util/libeutil.la			\
-	$(top_builddir)/calendar/gui/libevolution-calendar.la	\
-	$(top_builddir)/mail/libevolution-mail.la		\
-	$(top_builddir)/shell/libeshell.la			\
-	$(top_builddir)/em-format/libemformat.la		\
-	$(top_builddir)/widgets/misc/libemiscwidgets.la		\
-	$(top_builddir)/libemail-utils/libemail-utils.la	\
-	$(top_builddir)/libemail-engine/libemail-engine.la	\
+liborg_gnome_itip_formatter_la_CPPFLAGS = \
+	$(AM_CPPFLAGS) \
+	-I$(top_srcdir) \
+	-I$(top_srcdir)/widgets \
+	-DEVOLUTION_PRIVDATADIR=\""$(privdatadir)"\" \
+	$(EVOLUTION_DATA_SERVER_CFLAGS) \
+	$(GNOME_PLATFORM_CFLAGS) \
+	$(NULL)
+
+liborg_gnome_itip_formatter_la_SOURCES = \
+	e-conflict-search-selector.c \
+	e-conflict-search-selector.h \
+	e-source-conflict-search.c \
+	e-source-conflict-search.h \
+	itip-formatter.c \
+	itip-view.c \
+	itip-view.h \
+	$(NULL)
+
+liborg_gnome_itip_formatter_la_LDFLAGS = \
+	-module -avoid-version $(NO_UNDEFINED)
+
+liborg_gnome_itip_formatter_la_LIBADD = \
+	$(top_builddir)/e-util/libeutil.la \
+	$(top_builddir)/calendar/gui/libevolution-calendar.la \
+	$(top_builddir)/mail/libevolution-mail.la \
+	$(top_builddir)/shell/libeshell.la \
+	$(top_builddir)/em-format/libemformat.la \
+	$(top_builddir)/widgets/misc/libemiscwidgets.la \
+	$(top_builddir)/libemail-utils/libemail-utils.la \
+	$(top_builddir)/libemail-engine/libemail-engine.la \
 	$(top_builddir)/libevolution-utils/libevolution-utils.la \
-	$(EVOLUTION_DATA_SERVER_LIBS)				\
-	$(GNOME_PLATFORM_LIBS)
+	$(EVOLUTION_DATA_SERVER_LIBS) \
+	$(GNOME_PLATFORM_LIBS) \
+	$(NULL)
 
 error_DATA = org-gnome-itip-formatter.error
 errordir = $(privdatadir)/errors
@@ -37,6 +50,7 @@ CLEANFILES = $(BUILT_SOURCES)
 
 EXTRA_DIST = \
 	org-gnome-itip-formatter.eplug.xml \
-	org-gnome-itip-formatter.error.xml
+	org-gnome-itip-formatter.error.xml \
+	$(NULL)
 
 -include $(top_srcdir)/git.mk
diff --git a/plugins/itip-formatter/e-conflict-search-selector.c b/plugins/itip-formatter/e-conflict-search-selector.c
new file mode 100644
index 0000000..95d9f0b
--- /dev/null
+++ b/plugins/itip-formatter/e-conflict-search-selector.c
@@ -0,0 +1,98 @@
+/*
+ * e-conflict-search-selector.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+#include "e-conflict-search-selector.h"
+
+#include <libedataserver/e-source-calendar.h>
+
+#include "e-source-conflict-search.h"
+
+G_DEFINE_TYPE (
+	EConflictSearchSelector,
+	e_conflict_search_selector,
+	E_TYPE_SOURCE_SELECTOR)
+
+static gboolean
+conflict_search_selector_get_source_selected (ESourceSelector *selector,
+                                           ESource *source)
+{
+	ESourceConflictSearch *extension;
+	const gchar *extension_name;
+
+	/* Make sure this source is a calendar. */
+	extension_name = e_source_selector_get_extension_name (selector);
+	if (!e_source_has_extension (source, extension_name))
+		return FALSE;
+
+	extension_name = E_SOURCE_EXTENSION_CONFLICT_SEARCH;
+	extension = e_source_get_extension (source, extension_name);
+	g_return_val_if_fail (E_IS_SOURCE_CONFLICT_SEARCH (extension), FALSE);
+
+	return e_source_conflict_search_get_include_me (extension);
+}
+
+static void
+conflict_search_selector_set_source_selected (ESourceSelector *selector,
+                                           ESource *source,
+                                           gboolean selected)
+{
+	ESourceConflictSearch *extension;
+	const gchar *extension_name;
+
+	/* Make sure this source is a calendar. */
+	extension_name = e_source_selector_get_extension_name (selector);
+	if (!e_source_has_extension (source, extension_name))
+		return;
+
+	extension_name = E_SOURCE_EXTENSION_CONFLICT_SEARCH;
+	extension = e_source_get_extension (source, extension_name);
+	g_return_if_fail (E_IS_SOURCE_CONFLICT_SEARCH (extension));
+
+	if (selected != e_source_conflict_search_get_include_me (extension)) {
+		e_source_conflict_search_set_include_me (extension, selected);
+		e_source_selector_queue_write (selector, source);
+	}
+}
+
+static void
+e_conflict_search_selector_class_init (EConflictSearchSelectorClass *class)
+{
+	ESourceSelectorClass *source_selector_class;
+
+	source_selector_class = E_SOURCE_SELECTOR_CLASS (class);
+	source_selector_class->get_source_selected =
+				conflict_search_selector_get_source_selected;
+	source_selector_class->set_source_selected =
+				conflict_search_selector_set_source_selected;
+}
+
+static void
+e_conflict_search_selector_init (EConflictSearchSelector *selector)
+{
+}
+
+GtkWidget *
+e_conflict_search_selector_new (ESourceRegistry *registry)
+{
+	g_return_val_if_fail (E_IS_SOURCE_REGISTRY (registry), NULL);
+
+	return g_object_new (
+		E_TYPE_CONFLICT_SEARCH_SELECTOR,
+		"extension-name", E_SOURCE_EXTENSION_CALENDAR,
+		"registry", registry, NULL);
+}
diff --git a/plugins/itip-formatter/e-conflict-search-selector.h b/plugins/itip-formatter/e-conflict-search-selector.h
new file mode 100644
index 0000000..64981d8
--- /dev/null
+++ b/plugins/itip-formatter/e-conflict-search-selector.h
@@ -0,0 +1,64 @@
+/*
+ * e-conflict-search-selector.h
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+#ifndef E_CONFLICT_SEARCH_SELECTOR_H
+#define E_CONFLICT_SEARCH_SELECTOR_H
+
+#include <libedataserverui/e-source-selector.h>
+
+/* Standard GObject macros */
+#define E_TYPE_CONFLICT_SEARCH_SELECTOR \
+	(e_conflict_search_selector_get_type ())
+#define E_CONFLICT_SEARCH_SELECTOR(obj) \
+	(G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), E_TYPE_CONFLICT_SEARCH_SELECTOR, EConflictSearchSelector))
+#define E_CONFLICT_SEARCH_SELECTOR_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_CAST \
+	((cls), E_TYPE_CONFLICT_SEARCH_SELECTOR, EConflictSearchSelectorClass))
+#define E_IS_CONFLICT_SEARCH_SELECTOR(obj) \
+	(G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), E_TYPE_CONFLICT_SEARCH_SELECTOR))
+#define E_IS_CONFLICT_SEARCH_SELECTOR_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_TYPE \
+	((cls), E_TYPE_CONFLICT_SEARCH_SELECTOR))
+#define E_CONFLICT_SEARCH_SELECTOR_GET_CLASS(obj) \
+	(G_TYPE_INSTANCE_GET_CLASS \
+	((obj), E_TYPE_CONFLICT_SEARCH_SELECTOR, EConflictSearchSelectorClass))
+
+G_BEGIN_DECLS
+
+typedef struct _EConflictSearchSelector EConflictSearchSelector;
+typedef struct _EConflictSearchSelectorClass EConflictSearchSelectorClass;
+typedef struct _EConflictSearchSelectorPrivate EConflictSearchSelectorPrivate;
+
+struct _EConflictSearchSelector {
+	ESourceSelector parent;
+	EConflictSearchSelectorPrivate *priv;
+};
+
+struct _EConflictSearchSelectorClass {
+	ESourceSelectorClass parent_class;
+};
+
+GType		e_conflict_search_selector_get_type
+						(void) G_GNUC_CONST;
+GtkWidget *	e_conflict_search_selector_new	(ESourceRegistry *registry);
+
+G_END_DECLS
+
+#endif /* E_CONFLICT_SEARCH_SELECTOR_H */
diff --git a/plugins/itip-formatter/e-source-conflict-search.c b/plugins/itip-formatter/e-source-conflict-search.c
new file mode 100644
index 0000000..c2f5eb6
--- /dev/null
+++ b/plugins/itip-formatter/e-source-conflict-search.c
@@ -0,0 +1,151 @@
+/*
+ * e-source-conflict-search.c
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+#include "e-source-conflict-search.h"
+
+#define E_SOURCE_CONFLICT_SEARCH_GET_PRIVATE(obj) \
+	(G_TYPE_INSTANCE_GET_PRIVATE \
+	((obj), E_TYPE_SOURCE_CONFLICT_SEARCH, ESourceConflictSearchPrivate))
+
+struct _ESourceConflictSearchPrivate {
+	gboolean include_me;
+};
+
+enum {
+	PROP_0,
+	PROP_INCLUDE_ME
+};
+
+G_DEFINE_TYPE (
+	ESourceConflictSearch,
+	e_source_conflict_search,
+	E_TYPE_SOURCE_EXTENSION)
+
+static void
+source_conflict_search_set_property (GObject *object,
+                                     guint property_id,
+                                     const GValue *value,
+                                     GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_INCLUDE_ME:
+			e_source_conflict_search_set_include_me (
+				E_SOURCE_CONFLICT_SEARCH (object),
+				g_value_get_boolean (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+source_conflict_search_get_property (GObject *object,
+                                     guint property_id,
+                                     GValue *value,
+                                     GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_INCLUDE_ME:
+			g_value_set_boolean (
+				value,
+				e_source_conflict_search_get_include_me (
+				E_SOURCE_CONFLICT_SEARCH (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+e_source_conflict_search_class_init (ESourceConflictSearchClass *class)
+{
+	GObjectClass *object_class;
+	ESourceExtensionClass *extension_class;
+
+	g_type_class_add_private (class, sizeof (ESourceConflictSearchPrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = source_conflict_search_set_property;
+	object_class->get_property = source_conflict_search_get_property;
+
+	extension_class = E_SOURCE_EXTENSION_CLASS (class);
+	extension_class->name = E_SOURCE_EXTENSION_CONFLICT_SEARCH;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_INCLUDE_ME,
+		g_param_spec_boolean (
+			"include-me",
+			"IncludeMe",
+			"Include this calendar in when "
+			"searching for scheduling conflicts",
+			TRUE,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT |
+			G_PARAM_STATIC_STRINGS |
+			E_SOURCE_PARAM_SETTING));
+}
+
+static void
+e_source_conflict_search_init (ESourceConflictSearch *extension)
+{
+	extension->priv = E_SOURCE_CONFLICT_SEARCH_GET_PRIVATE (extension);
+}
+
+/**
+ * e_source_conflict_search_get_include_me:
+ * @extension: an #ESourceConflictSearch
+ *
+ * Returns whether the calendar described by the #ESource to which
+ * @extension belongs should be queried for scheduling conflicts when
+ * negotiating a meeting invitation.
+ *
+ * Returns: whether to search for scheduling conflicts
+ *
+ * Since: 3.6
+ **/
+gboolean
+e_source_conflict_search_get_include_me (ESourceConflictSearch *extension)
+{
+	g_return_val_if_fail (E_IS_SOURCE_CONFLICT_SEARCH (extension), FALSE);
+
+	return extension->priv->include_me;
+}
+
+/**
+ * e_source_conflict_search_set_include_me:
+ * @extension: an #ESourceConflictSearch
+ * @include_me: whether to search for scheduling conflicts
+ *
+ * Sets whether the calendar described by the #ESource to which @extension
+ * belongs should be queried for scheduling conflicts when negotiating a
+ * meeting invitation.
+ *
+ * Since: 3.6
+ **/
+void
+e_source_conflict_search_set_include_me (ESourceConflictSearch *extension,
+                                         gboolean include_me)
+{
+	g_return_if_fail (E_IS_SOURCE_CONFLICT_SEARCH (extension));
+
+	extension->priv->include_me = include_me;
+
+	g_object_notify (G_OBJECT (extension), "include-me");
+}
+
diff --git a/plugins/itip-formatter/e-source-conflict-search.h b/plugins/itip-formatter/e-source-conflict-search.h
new file mode 100644
index 0000000..d574bbd
--- /dev/null
+++ b/plugins/itip-formatter/e-source-conflict-search.h
@@ -0,0 +1,86 @@
+/*
+ * e-source-conflict-search.h
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) version 3.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the program; if not, see <http://www.gnu.org/licenses/>
+ *
+ */
+
+#ifndef E_SOURCE_CONFLICT_SEARCH_H
+#define E_SOURCE_CONFLICT_SEARCH_H
+
+#include <libedataserver/e-source-extension.h>
+
+/* Standard GObject macros */
+#define E_TYPE_SOURCE_CONFLICT_SEARCH \
+	(e_source_conflict_search_get_type ())
+#define E_SOURCE_CONFLICT_SEARCH(obj) \
+	(G_TYPE_CHECK_INSTANCE_CAST \
+	((obj), E_TYPE_SOURCE_CONFLICT_SEARCH, ESourceConflictSearch))
+#define E_SOURCE_CONFLICT_SEARCH_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_CAST \
+	((cls), E_TYPE_SOURCE_CONFLICT_SEARCH, ESourceConflictSearchClass))
+#define E_IS_SOURCE_CONFLICT_SEARCH(obj) \
+	(G_TYPE_CHECK_INSTANCE_TYPE \
+	((obj), E_TYPE_SOURCE_CONFLICT_SEARCH))
+#define E_IS_SOURCE_CONFLICT_SEARCH_CLASS(cls) \
+	(G_TYPE_CHECK_CLASS_TYPE \
+	((cls), E_TYPE_SOURCE_CONFLICT_SEARCH))
+#define E_SOURCE_CONFLICT_SEARCH_GET_CLASS(obj) \
+	(G_TYPE_INSTANCE_GET_CLASS \
+	((obj), E_TYPE_SOURCE_CONFLICT_SEARCH, ESourceConflictSearchClass))
+
+/**
+ * E_SOURCE_EXTENSION_CONFLICT_SEARCH:
+ *
+ * Pass this extension name to e_source_get_extension() to access
+ * #ESourceConflictSearch.  This is also used as a group name in key files.
+ *
+ * Since: 3.6
+ **/
+#define E_SOURCE_EXTENSION_CONFLICT_SEARCH "Conflict Search"
+
+G_BEGIN_DECLS
+
+typedef struct _ESourceConflictSearch ESourceConflictSearch;
+typedef struct _ESourceConflictSearchClass ESourceConflictSearchClass;
+typedef struct _ESourceConflictSearchPrivate ESourceConflictSearchPrivate;
+
+/**
+ * ESourceConflictSearch:
+ *
+ * Contains only private data that should be read and manipulated using the
+ * functions below.
+ *
+ * Since: 3.6
+ **/
+struct _ESourceConflictSearch {
+	ESourceExtension parent;
+	ESourceConflictSearchPrivate *priv;
+};
+
+struct _ESourceConflictSearchClass {
+	ESourceExtensionClass parent_class;
+};
+
+GType		e_source_conflict_search_get_type
+						(void) G_GNUC_CONST;
+gboolean	e_source_conflict_search_get_include_me
+						(ESourceConflictSearch *extension);
+void		e_source_conflict_search_set_include_me
+						(ESourceConflictSearch *extension,
+						 gboolean include_me);
+
+G_END_DECLS
+
+#endif /* E_SOURCE_CONFLICT_SEARCH_H */
diff --git a/plugins/itip-formatter/itip-formatter.c b/plugins/itip-formatter/itip-formatter.c
index f2e92a0..39e2b4a 100644
--- a/plugins/itip-formatter/itip-formatter.c
+++ b/plugins/itip-formatter/itip-formatter.c
@@ -30,7 +30,8 @@
 
 #include <libecal/e-cal-client.h>
 #include <libecal/e-cal-time-util.h>
-#include <libedataserver/e-account-list.h>
+#include <libedataserver/e-source-calendar.h>
+#include <libedataserver/e-source-mail-identity.h>
 #include <libedataserverui/e-source-selector.h>
 #include <libedataserverui/e-client-utils.h>
 
@@ -40,7 +41,6 @@
 #include <shell/e-shell.h>
 #include <shell/e-shell-utils.h>
 
-#include <libemail-utils/e-account-utils.h>
 #include <libemail-utils/mail-mt.h>
 
 #include <libemail-engine/mail-folder-cache.h>
@@ -55,6 +55,8 @@
 
 #include <calendar/gui/itip-utils.h>
 
+#include "e-conflict-search-selector.h"
+#include "e-source-conflict-search.h"
 #include "itip-view.h"
 
 #define CONF_KEY_DELETE "delete-processed"
@@ -71,7 +73,7 @@ struct _ItipPURI {
 
 	gchar *uid;
 
-	ESourceList *source_lists[E_CAL_CLIENT_SOURCE_TYPE_LAST];
+	ESourceRegistry *registry;
 	GHashTable *clients[E_CAL_CLIENT_SOURCE_TYPE_LAST];
 
 	ECalClient *current_client;
@@ -95,8 +97,6 @@ struct _ItipPURI {
 
 	gchar *calendar_uid;
 
-	EAccountList *accounts;
-
 	gchar *from_address;
 	gchar *from_name;
 	gchar *to_address;
@@ -249,133 +249,154 @@ find_to_address (ItipPURI *pitip,
                  icalcomponent *ical_comp,
                  icalparameter_partstat *status)
 {
-	EIterator *it;
+	ESourceRegistry *registry;
+	ESourceMailIdentity *extension;
+	GList *list, *link;
+	const gchar *extension_name;
 
-	it = e_list_get_iterator ((EList *) pitip->accounts);
+	registry = pitip->registry;
+	extension_name = E_SOURCE_EXTENSION_MAIL_IDENTITY;
 
-	if (!pitip->to_address && pitip->msg && pitip->folder) {
-		EAccount *account = em_utils_guess_account (pitip->msg, pitip->folder);
+	if (pitip->to_address != NULL)
+		return;
 
-		if (account) {
-			pitip->to_address = g_strdup (e_account_get_string (account, E_ACCOUNT_ID_ADDRESS));
-			if (pitip->to_address && !*pitip->to_address) {
-				g_free (pitip->to_address);
-				pitip->to_address = NULL;
-			}
+	if (pitip->msg != NULL && pitip->folder != NULL) {
+		ESource *source;
+
+		source = em_utils_guess_mail_identity (
+			registry, pitip->msg, pitip->folder);
+
+		if (source != NULL) {
+			extension = e_source_get_extension (source, extension_name);
+
+			pitip->to_address = e_source_mail_identity_dup_address (extension);
+
+			g_object_unref (source);
 		}
 	}
 
+	if (pitip->to_address != NULL)
+		return;
+
 	/* Look through the list of attendees to find the user's address */
-	if (!pitip->to_address)
-		while (e_iterator_is_valid (it)) {
-			const EAccount *account = e_iterator_get (it);
-			icalproperty *prop = NULL;
 
-			if (!account->enabled) {
-				e_iterator_next (it);
-				continue;
-			}
+	list = e_source_registry_list_sources (registry, extension_name);
 
-			prop = find_attendee (ical_comp, account->id->address);
+	for (link = list; link != NULL; link = g_list_next (link)) {
+		ESource *source = E_SOURCE (link->data);
+		icalproperty *prop = NULL;
+		icalparameter *param;
+		const gchar *address;
+		gchar *text;
 
-			if (prop) {
-				gchar *text;
-				icalparameter *param;
+		if (!e_source_get_enabled (source))
+			continue;
 
-				param = icalproperty_get_first_parameter (prop, ICAL_CN_PARAMETER);
-				if (param)
-					pitip->to_name = g_strdup (icalparameter_get_cn (param));
+		extension = e_source_get_extension (source, extension_name);
+		address = e_source_mail_identity_get_address (extension);
 
-				text = icalproperty_get_value_as_string_r (prop);
+		prop = find_attendee (ical_comp, address);
+		if (prop == NULL)
+			continue;
 
-				pitip->to_address = g_strdup (itip_strip_mailto (text));
-				g_free (text);
-				g_strstrip (pitip->to_address);
+		param = icalproperty_get_first_parameter (prop, ICAL_CN_PARAMETER);
+		if (param != NULL)
+			pitip->to_name = g_strdup (icalparameter_get_cn (param));
 
-				pitip->my_address = g_strdup (account->id->address);
+		text = icalproperty_get_value_as_string_r (prop);
 
-				param = icalproperty_get_first_parameter (prop, ICAL_RSVP_PARAMETER);
-				if (param &&
-				    icalparameter_get_rsvp (param) == ICAL_RSVP_FALSE) {
-					pitip->no_reply_wanted = TRUE;
-				}
+		pitip->to_address = g_strdup (itip_strip_mailto (text));
+		g_free (text);
+		g_strstrip (pitip->to_address);
 
-				if (status) {
-					param = icalproperty_get_first_parameter (prop, ICAL_PARTSTAT_PARAMETER);
-					*status = param ? icalparameter_get_partstat (param) : ICAL_PARTSTAT_NEEDSACTION;
-				}
+		pitip->my_address = g_strdup (address);
 
-				break;
-			}
-			e_iterator_next (it);
+		param = icalproperty_get_first_parameter (prop, ICAL_RSVP_PARAMETER);
+		if (param != NULL &&
+		    icalparameter_get_rsvp (param) == ICAL_RSVP_FALSE)
+			pitip->no_reply_wanted = TRUE;
+
+		if (status) {
+			param = icalproperty_get_first_parameter (prop, ICAL_PARTSTAT_PARAMETER);
+			*status = param ? icalparameter_get_partstat (param) : ICAL_PARTSTAT_NEEDSACTION;
 		}
 
-	e_iterator_reset (it);
+		break;
+	}
+
+	g_list_free_full (list, (GDestroyNotify) g_object_unref);
+
+	if (pitip->to_address != NULL)
+		return;
 
-	/* If the user's address was not found in the attendee's list, then the user
-	 * might be responding on behalf of his/her delegator. In this case, we
-	 * would want to go through the SENT-BY fields of the attendees to find
-	 * the user's address.
+	/* If the user's address was not found in the attendee's list,
+	 * then the user might be responding on behalf of his/her delegator.
+	 * In this case, we would want to go through the SENT-BY fields of
+	 * the attendees to find the user's address.
 	 *
-	 * Note: This functionality could have been (easily) implemented in the
-	 * previous loop, but it would hurt the performance for all providers in
-	 * general. Hence, we choose to iterate through the accounts list again.
+	 * Note: This functionality could have been (easily) implemented
+	 * in the previous loop, but it would hurt the performance for all
+	 * providers in general. Hence, we choose to iterate through the
+	 * accounts list again.
 	 */
-	if (!pitip->to_address)
-		while (e_iterator_is_valid (it)) {
-			const EAccount *account = e_iterator_get (it);
-			icalproperty *prop = NULL;
 
-			if (!account->enabled) {
-				e_iterator_next (it);
-				continue;
-			}
+	list = e_source_registry_list_sources (registry, extension_name);
 
-			prop = find_attendee_if_sentby (ical_comp, account->id->address);
+	for (link = list; link != NULL; link = g_list_next (link)) {
+		ESource *source = E_SOURCE (link->data);
+		icalproperty *prop = NULL;
+		icalparameter *param;
+		const gchar *address;
+		gchar *text;
 
-			if (prop) {
-				gchar *text;
-				icalparameter *param;
 
-				param = icalproperty_get_first_parameter (prop, ICAL_CN_PARAMETER);
-				if (param)
-					pitip->to_name = g_strdup (icalparameter_get_cn (param));
+		if (!e_source_get_enabled (source))
+			continue;
 
-				text = icalproperty_get_value_as_string_r (prop);
+		extension = e_source_get_extension (source, extension_name);
+		address = e_source_mail_identity_get_address (extension);
 
-				pitip->to_address = g_strdup (itip_strip_mailto (text));
-				g_free (text);
-				g_strstrip (pitip->to_address);
+		prop = find_attendee_if_sentby (ical_comp, address);
+		if (prop == NULL)
+			continue;
 
-				pitip->my_address = g_strdup (account->id->address);
+		param = icalproperty_get_first_parameter (prop, ICAL_CN_PARAMETER);
+		if (param != NULL)
+			pitip->to_name = g_strdup (icalparameter_get_cn (param));
 
-				param = icalproperty_get_first_parameter (prop, ICAL_RSVP_PARAMETER);
-				if (param &&
-				    ICAL_RSVP_FALSE == icalparameter_get_rsvp (param)) {
-					pitip->no_reply_wanted = TRUE;
-				}
+		text = icalproperty_get_value_as_string_r (prop);
 
-				if (status) {
-					param = icalproperty_get_first_parameter (prop, ICAL_PARTSTAT_PARAMETER);
-					*status = param ? icalparameter_get_partstat (param) : ICAL_PARTSTAT_NEEDSACTION;
-				}
+		pitip->to_address = g_strdup (itip_strip_mailto (text));
+		g_free (text);
+		g_strstrip (pitip->to_address);
 
-				break;
-			}
-			e_iterator_next (it);
+		pitip->my_address = g_strdup (address);
+
+		param = icalproperty_get_first_parameter (prop, ICAL_RSVP_PARAMETER);
+		if (param != NULL &&
+		    ICAL_RSVP_FALSE == icalparameter_get_rsvp (param))
+			pitip->no_reply_wanted = TRUE;
+
+		if (status) {
+			param = icalproperty_get_first_parameter (prop, ICAL_PARTSTAT_PARAMETER);
+			*status = param ? icalparameter_get_partstat (param) : ICAL_PARTSTAT_NEEDSACTION;
 		}
 
-	g_object_unref (it);
+		break;
+	}
+
+	g_list_free_full (list, (GDestroyNotify) g_object_unref);
 }
 
 static void
 find_from_address (ItipPURI *pitip,
                    icalcomponent *ical_comp)
 {
-	EIterator *it;
+	GList *list, *link;
 	icalproperty *prop;
 	gchar *organizer;
 	icalparameter *param;
+	const gchar *extension_name;
 	const gchar *organizer_sentby;
 	gchar *organizer_clean = NULL;
 	gchar *organizer_sentby_clean = NULL;
@@ -410,24 +431,33 @@ find_from_address (ItipPURI *pitip,
 	if (param)
 		pitip->from_name = g_strdup (icalparameter_get_cn (param));
 
-	it = e_list_get_iterator ((EList *) pitip->accounts);
-	while (e_iterator_is_valid (it)) {
-		const EAccount *account = e_iterator_get (it);
+	extension_name = E_SOURCE_EXTENSION_MAIL_IDENTITY;
+	list = e_source_registry_list_sources (pitip->registry, extension_name);
 
-		if (!account->enabled) {
-			e_iterator_next (it);
+	for (link = list; link != NULL; link = g_list_next (link)) {
+		ESource *source = E_SOURCE (link->data);
+		ESourceMailIdentity *extension;
+		const gchar *address;
+
+		if (!e_source_get_enabled (source))
+			continue;
+
+		extension = e_source_get_extension (source, extension_name);
+		address = e_source_mail_identity_get_address (extension);
+
+		if (address == NULL)
 			continue;
-		}
 
-		if ((organizer_clean && !g_ascii_strcasecmp (organizer_clean, account->id->address))
-		    || (organizer_sentby_clean && !g_ascii_strcasecmp (organizer_sentby_clean, account->id->address))) {
-			pitip->my_address = g_strdup (account->id->address);
+		if ((organizer_clean && !g_ascii_strcasecmp (organizer_clean, address))
+		    || (organizer_sentby_clean && !g_ascii_strcasecmp (organizer_sentby_clean, address))) {
+			pitip->my_address = g_strdup (address);
 
 			break;
 		}
-		e_iterator_next (it);
 	}
-	g_object_unref (it);
+
+	g_list_free_full (list, (GDestroyNotify) g_object_unref);
+
 	g_free (organizer_sentby_clean);
 	g_free (organizer_clean);
 }
@@ -603,7 +633,6 @@ start_calendar_server (ItipPURI *pitip,
 		type == E_CAL_CLIENT_SOURCE_TYPE_MEMOS ? E_CLIENT_SOURCE_TYPE_MEMOS :
 		type == E_CAL_CLIENT_SOURCE_TYPE_TASKS ? E_CLIENT_SOURCE_TYPE_TASKS : E_CLIENT_SOURCE_TYPE_LAST,
 		TRUE, pitip->cancellable,
-		e_client_utils_authenticate_handler, NULL,
 		func, data);
 }
 
@@ -613,18 +642,15 @@ start_calendar_server_by_uid (ItipPURI *pitip,
                               const gchar *uid,
                               ECalClientSourceType type)
 {
-	gint i;
+	ESource *source;
 
 	itip_view_set_buttons_sensitive (view, FALSE);
 
-	for (i = 0; i < E_CAL_CLIENT_SOURCE_TYPE_LAST; i++) {
-		ESource *source;
-
-		source = e_source_list_peek_source_by_uid (pitip->source_lists[i], uid);
-		if (source) {
-			start_calendar_server (pitip, view, source, type, cal_opened_cb, view);
-			break;
-		}
+	source = e_source_registry_ref_source (pitip->registry, uid);
+	if (source != NULL) {
+		start_calendar_server (
+			pitip, view, source, type, cal_opened_cb, view);
+		g_object_unref (source);
 	}
 }
 
@@ -751,53 +777,34 @@ decrease_find_data (FormatItipFindData *fd)
 		    && !pitip->current_client) {
 			/* Reuse already declared one or rename? */
 			ESource *source = NULL;
+			const gchar *extension_name;
 
-			/* Try to create a default if there isn't one */
-			source = e_source_list_peek_default_source (pitip->source_lists[pitip->type]);
-
-			if (!source) {
-				EShell *shell;
-				EShellSettings *shell_settings;
-				gchar *uid;
-
-				/* FIXME Find a better way to obtain the shell. */
-				shell = e_shell_get_default ();
-				shell_settings = e_shell_get_shell_settings (shell);
-
-				switch (pitip->type) {
+			switch (pitip->type) {
 				case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
-					uid = e_shell_settings_get_string (
-						shell_settings, "cal-primary-calendar");
+					extension_name = E_SOURCE_EXTENSION_CALENDAR;
 					break;
 				case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
-					uid = e_shell_settings_get_string (
-						shell_settings, "cal-primary-task-list");
+					extension_name = E_SOURCE_EXTENSION_TASK_LIST;
 					break;
 				case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
-					uid = e_shell_settings_get_string (
-						shell_settings, "cal-primary-memo-list");
+					extension_name = E_SOURCE_EXTENSION_MEMO_LIST;
 					break;
 				default:
-					uid = NULL;
-					g_assert_not_reached ();
-				}
-
-				if (uid) {
-					source = e_source_list_peek_source_by_uid (pitip->source_lists[pitip->type], uid);
-					g_free (uid);
-				}
+					g_return_if_reached ();
 			}
 
-			if (!source)
-				source = e_source_list_peek_source_any (pitip->source_lists[pitip->type]);
+			source = e_source_registry_ref_default_for_extension_name (
+				pitip->registry, extension_name);
+
+			itip_view_set_extension_name (view, extension_name);
 
-			itip_view_set_source_list (view, pitip->source_lists[pitip->type]);
 			g_signal_connect (
 				view, "source_selected",
 				G_CALLBACK (source_selected_cb), pitip);
 
-			if (source) {
+			if (source != NULL) {
 				itip_view_set_source (view, source);
+				g_object_unref (source);
 
 				/* FIXME Shouldn't the buttons be sensitized here? */
 			} else {
@@ -994,6 +1001,8 @@ find_cal_opened_cb (GObject *source_object,
 	ECalClientSourceType source_type;
 	EClient *client = NULL;
 	ECalClient *cal_client;
+	gboolean search_for_conflicts = FALSE;
+	const gchar *extension_name;
 	const gchar *uid;
 	GError *error = NULL;
 
@@ -1041,18 +1050,32 @@ find_cal_opened_cb (GObject *source_object,
 	g_hash_table_insert (
 		pitip->clients[source_type], g_strdup (uid), cal_client);
 
+	extension_name = E_SOURCE_EXTENSION_CONFLICT_SEARCH;
+	if (e_source_has_extension (source, extension_name)) {
+		ESourceConflictSearch *extension;
+
+		extension = e_source_get_extension (source, extension_name);
+		search_for_conflicts =
+			(pitip->type == E_CAL_CLIENT_SOURCE_TYPE_EVENTS) &&
+			e_source_conflict_search_get_include_me (extension);
+	}
+
 	/* Check for conflicts */
 	/* If the query fails, we'll just ignore it */
 	/* FIXME What happens for recurring conflicts? */
-	if (pitip->type == E_CAL_CLIENT_SOURCE_TYPE_EVENTS
-	    && e_source_get_property (E_SOURCE (source), "conflict")
-	    && !g_ascii_strcasecmp (e_source_get_property (E_SOURCE (source), "conflict"), "true")) {
-		e_cal_client_get_object_list (cal_client, fd->sexp, fd->cancellable, get_object_list_ready_cb, fd);
+	if (search_for_conflicts) {
+		e_cal_client_get_object_list (
+			cal_client, fd->sexp,
+			fd->cancellable,
+			get_object_list_ready_cb, fd);
 		return;
 	}
 
 	if (!pitip->current_client) {
-		e_cal_client_get_object (cal_client, fd->uid, fd->rid, fd->cancellable, get_object_with_rid_ready_cb, fd);
+		e_cal_client_get_object (
+			cal_client, fd->uid, fd->rid,
+			fd->cancellable,
+			get_object_with_rid_ready_cb, fd);
 		return;
 	}
 
@@ -1065,77 +1088,93 @@ find_server (ItipPURI *pitip,
              ECalComponent *comp)
 {
 	FormatItipFindData *fd = NULL;
-	GSList *groups, *l, *sources_conflict = NULL, *all_sources = NULL;
 	const gchar *uid;
 	gchar *rid = NULL;
 	CamelStore *parent_store;
-	CamelURL *url;
-	gchar *uri;
-	ESource *source = NULL, *current_source = NULL;
+	ESourceRegistry *registry;
+	ESource *current_source = NULL;
+	GList *list, *link;
+	GList *conflict_list = NULL;
+	const gchar *extension_name;
+	const gchar *store_uid;
 
 	g_return_if_fail (pitip->folder != NULL);
 
+	switch (pitip->type) {
+		case E_CAL_CLIENT_SOURCE_TYPE_EVENTS:
+			extension_name = E_SOURCE_EXTENSION_CALENDAR;
+			break;
+		case E_CAL_CLIENT_SOURCE_TYPE_TASKS:
+			extension_name = E_SOURCE_EXTENSION_TASK_LIST;
+			break;
+		case E_CAL_CLIENT_SOURCE_TYPE_MEMOS:
+			extension_name = E_SOURCE_EXTENSION_MEMO_LIST;
+			break;
+		default:
+			g_return_if_reached ();
+	}
+
+	registry = pitip->registry;
+	list = e_source_registry_list_sources (registry, extension_name);
+
 	e_cal_component_get_uid (comp, &uid);
 	rid = e_cal_component_get_recurid_as_string (comp);
 
+	/* XXX Not sure what this was trying to do,
+	 *     but it propbably doesn't work anymore.
+	 *     Some comments would have been helpful. */
 	parent_store = camel_folder_get_parent_store (pitip->folder);
-
-	url = camel_service_new_camel_url (CAMEL_SERVICE (parent_store));
-	uri = camel_url_to_string (url, CAMEL_URL_HIDE_ALL);
-	camel_url_free (url);
+	store_uid = camel_service_get_uid (CAMEL_SERVICE (parent_store));
 
 	itip_view_set_buttons_sensitive (view, FALSE);
 
-	groups = e_source_list_peek_groups (pitip->source_lists[pitip->type]);
-	for (l = groups; l; l = l->next) {
-		ESourceGroup *group;
-		GSList *sources, *m;
-
-		group = l->data;
-
-		sources = e_source_group_peek_sources (group);
-		for (m = sources; m; m = m->next) {
-			gchar *source_uri = NULL;
-
-			source = m->data;
+	for (link = list; link != NULL; link = g_list_next (link)) {
+		ESource *source = E_SOURCE (link->data);
+		gboolean search_for_conflicts = FALSE;
+		const gchar *source_uid;
 
-			if (e_source_get_property (source, "conflict"))
-				sources_conflict = g_slist_prepend (sources_conflict, source);
+		extension_name = E_SOURCE_EXTENSION_CONFLICT_SEARCH;
+		if (e_source_has_extension (source, extension_name)) {
+			ESourceConflictSearch *extension;
 
-			if (current_source)
-				continue;
+			extension =
+				e_source_get_extension (source, extension_name);
+			search_for_conflicts =
+				e_source_conflict_search_get_include_me (extension);
+		}
 
-			source_uri = e_source_get_uri (source);
-			if (source_uri && (strcmp (uri, source_uri) == 0)) {
-				current_source = source;
-				sources_conflict = g_slist_prepend (sources_conflict, source);
+		if (search_for_conflicts)
+			conflict_list = g_list_prepend (
+				conflict_list, g_object_ref (source));
 
-				g_free (source_uri);
-				continue;
-			}
+		if (current_source != NULL)
+			continue;
 
-			all_sources = g_slist_prepend (all_sources, source);
-			g_free (source_uri);
+		source_uid = e_source_get_uid (source);
+		if (g_strcmp0 (source_uid, store_uid) == 0) {
+			current_source = source;
+			conflict_list = g_list_prepend (
+				conflict_list, g_object_ref (source));
 
+			continue;
 		}
 	}
 
 	if (current_source) {
-		l = sources_conflict;
+		link = conflict_list;
 
 		pitip->progress_info_id = itip_view_add_lower_info_item (
 			view, ITIP_VIEW_INFO_ITEM_TYPE_PROGRESS,
 			_("Opening the calendar. Please wait..."));
 	} else {
+		link = list;
 		pitip->progress_info_id = itip_view_add_lower_info_item (
 			view, ITIP_VIEW_INFO_ITEM_TYPE_PROGRESS,
 			_("Searching for an existing version of this appointment"));
-
-		l = all_sources;
 	}
 
-	for (; l != NULL; l = l->next) {
-		source = l->data;
+	for (; link != NULL; link = g_list_next (link)) {
+		ESource *source = E_SOURCE (link->data);
 
 		if (!fd) {
 			gchar *start = NULL, *end = NULL;
@@ -1165,20 +1204,24 @@ find_server (ItipPURI *pitip,
 		d(printf ("Increasing itip formatter search count to %d\n", fd->count));
 
 		if (current_source == source)
-			start_calendar_server (pitip, view, source, pitip->type, find_cal_opened_cb, fd);
+			start_calendar_server (
+				pitip, view, source, pitip->type,
+				find_cal_opened_cb, fd);
 		else
-			start_calendar_server (pitip, view, source, pitip->type, find_cal_opened_cb, fd);
-
+			start_calendar_server (
+				pitip, view, source, pitip->type,
+				find_cal_opened_cb, fd);
 	}
 
-	g_slist_free (all_sources);
-	g_slist_free (sources_conflict);
-	g_free (uri);
+	g_list_free_full (conflict_list, (GDestroyNotify) g_object_unref);
+	g_list_free_full (list, (GDestroyNotify) g_object_unref);
+
 	g_free (rid);
 }
 
 static gboolean
-change_status (icalcomponent *ical_comp,
+change_status (ESourceRegistry *registry,
+               icalcomponent *ical_comp,
                const gchar *address,
                icalparameter_partstat status)
 {
@@ -1204,14 +1247,16 @@ change_status (icalcomponent *ical_comp,
 			param = icalparameter_new_partstat (status);
 			icalproperty_add_parameter (prop, param);
 		} else {
-			EAccount *a;
+			gchar *default_name = NULL;
+			gchar *default_address = NULL;
 
-			a = e_get_default_account ();
+			itip_get_default_name_and_address (
+				registry, &default_name, &default_address);
 
-			prop = icalproperty_new_attendee (a->id->address);
+			prop = icalproperty_new_attendee (default_address);
 			icalcomponent_add_property (ical_comp, prop);
 
-			param = icalparameter_new_cn (a->id->name);
+			param = icalparameter_new_cn (default_name);
 			icalproperty_add_parameter (prop, param);
 
 			param = icalparameter_new_role (ICAL_ROLE_REQPARTICIPANT);
@@ -1219,6 +1264,9 @@ change_status (icalcomponent *ical_comp,
 
 			param = icalparameter_new_partstat (status);
 			icalproperty_add_parameter (prop, param);
+
+			g_free (default_name);
+			g_free (default_address);
 		}
 	}
 
@@ -1467,7 +1515,12 @@ finish_message_delete_with_rsvp (ItipPURI *pitip,
 		}
 
 		e_cal_component_rescan (comp);
-		if (itip_send_comp (E_CAL_COMPONENT_METHOD_REPLY, comp, pitip->current_client, pitip->top_level, NULL, NULL, TRUE, FALSE) && pitip->folder) {
+		if (itip_send_comp (
+				pitip->registry,
+				E_CAL_COMPONENT_METHOD_REPLY,
+				comp, pitip->current_client,
+				pitip->top_level, NULL, NULL, TRUE, FALSE) &&
+				pitip->folder != NULL) {
 			camel_folder_set_message_flags (
 				pitip->folder, pitip->uid,
 				CAMEL_MESSAGE_ANSWERED,
@@ -1506,7 +1559,7 @@ receive_objects_ready_cb (GObject *ecalclient,
 		return;
 	}
 
-	itip_view_set_source_list (view, NULL);
+	itip_view_set_extension_name (view, NULL);
 
 	itip_view_clear_lower_info_items (view);
 
@@ -1786,7 +1839,8 @@ set_attendee (ECalComponent *comp,
 }
 
 static gboolean
-send_comp_to_attendee (ECalComponentItipMethod method,
+send_comp_to_attendee (ESourceRegistry *registry,
+                       ECalComponentItipMethod method,
                        ECalComponent *comp,
                        const gchar *user,
                        ECalClient *client,
@@ -1811,7 +1865,9 @@ send_comp_to_attendee (ECalComponentItipMethod method,
 	}
 
 	/* FIXME send the attachments in the request */
-	status = itip_send_comp (method, send_comp, client, NULL, NULL, NULL, TRUE, FALSE);
+	status = itip_send_comp (
+		registry, method, send_comp,
+		client, NULL, NULL, NULL, TRUE, FALSE);
 
 	g_object_unref (send_comp);
 
@@ -1830,10 +1886,12 @@ remove_delegate (ItipPURI *pitip,
 
 	/* send cancellation notice to delegate */
 	status = send_comp_to_attendee (
+		pitip->registry,
 		E_CAL_COMPONENT_METHOD_CANCEL, pitip->comp,
 		delegate, pitip->current_client, comment);
 	if (status)
 		send_comp_to_attendee (
+			pitip->registry,
 			E_CAL_COMPONENT_METHOD_REQUEST, pitip->comp,
 			 delegator, pitip->current_client, comment);
 	if (status) {
@@ -1979,11 +2037,15 @@ update_attendee_status_icalcomp (ItipPURI *pitip,
 					}
 				}
 
-				response = e_alert_run_dialog_for_args (e_shell_get_active_window (shell),
-									"org.gnome.itip-formatter:add-unknown-attendee", NULL);
+				response = e_alert_run_dialog_for_args (
+					e_shell_get_active_window (shell),
+					"org.gnome.itip-formatter:add-unknown-attendee", NULL);
 
 				if (response == GTK_RESPONSE_YES) {
-					change_status (icalcomp, itip_strip_mailto (a->value), a->status);
+					change_status (
+						pitip->registry, icalcomp,
+						itip_strip_mailto (a->value),
+						a->status);
 					e_cal_component_rescan (comp);
 				} else {
 					goto cleanup;
@@ -2004,7 +2066,10 @@ update_attendee_status_icalcomp (ItipPURI *pitip,
 					new_prop = find_attendee (org_icalcomp, itip_strip_mailto (a->value));
 					icalcomponent_add_property (icalcomp, icalproperty_new_clone (new_prop));
 				} else
-					change_status (icalcomp, itip_strip_mailto (a->value), a->status);
+					change_status (
+						pitip->registry, icalcomp,
+						itip_strip_mailto (a->value),
+						a->status);
 
 				e_cal_component_rescan (comp);
 			}
@@ -2015,7 +2080,11 @@ update_attendee_status_icalcomp (ItipPURI *pitip,
 
 	if (itip_view_get_update (view)) {
 		e_cal_component_commit_sequence (comp);
-		itip_send_comp (E_CAL_COMPONENT_METHOD_REQUEST, comp, pitip->current_client, NULL, NULL, NULL, TRUE, FALSE);
+		itip_send_comp (
+			pitip->registry,
+			E_CAL_COMPONENT_METHOD_REQUEST,
+			comp, pitip->current_client,
+			NULL, NULL, NULL, TRUE, FALSE);
 	}
 
 	update_item_progress_info (pitip, view, _("Saving changes to the calendar. Please wait..."));
@@ -2147,7 +2216,11 @@ send_item (ItipPURI *pitip,
 	comp = get_real_item (pitip);
 
 	if (comp != NULL) {
-		itip_send_comp (E_CAL_COMPONENT_METHOD_REQUEST, comp, pitip->current_client, NULL, NULL, NULL, TRUE, FALSE);
+		itip_send_comp (
+			pitip->registry,
+			E_CAL_COMPONENT_METHOD_REQUEST,
+			comp, pitip->current_client,
+			NULL, NULL, NULL, TRUE, FALSE);
 		g_object_unref (comp);
 
 		switch (pitip->type) {
@@ -2421,7 +2494,7 @@ extract_itip_data (ItipPURI *pitip,
 		prop = NULL;
 		comp = e_cal_component_new ();
 		e_cal_component_set_icalcomponent (comp, icalcomponent_new_clone (pitip->ical_comp));
-		my_address = itip_get_comp_attendee (comp, NULL);
+		my_address = itip_get_comp_attendee (pitip->registry, comp, NULL);
 		g_object_unref (comp);
 		comp = NULL;
 
@@ -2645,7 +2718,10 @@ view_response_cb (ItipView *view,
 	switch (response) {
 		case ITIP_VIEW_RESPONSE_ACCEPT:
 			if (pitip->type != E_CAL_CLIENT_SOURCE_TYPE_MEMOS)
-				status = change_status (pitip->ical_comp, pitip->to_address,
+				status = change_status (
+					pitip->registry,
+					pitip->ical_comp,
+					pitip->to_address,
 					ICAL_PARTSTAT_ACCEPTED);
 			else
 				status = TRUE;
@@ -2656,8 +2732,11 @@ view_response_cb (ItipView *view,
 			}
 			break;
 		case ITIP_VIEW_RESPONSE_TENTATIVE:
-			status = change_status (pitip->ical_comp, pitip->to_address,
-					ICAL_PARTSTAT_TENTATIVE);
+			status = change_status (
+				pitip->registry,
+				pitip->ical_comp,
+				pitip->to_address,
+				ICAL_PARTSTAT_TENTATIVE);
 			if (status) {
 				e_cal_component_rescan (pitip->comp);
 				pitip->can_delete_invitation_from_cache = TRUE;
@@ -2666,7 +2745,10 @@ view_response_cb (ItipView *view,
 			break;
 		case ITIP_VIEW_RESPONSE_DECLINE:
 			if (pitip->type != E_CAL_CLIENT_SOURCE_TYPE_MEMOS)
-				status = change_status (pitip->ical_comp, pitip->to_address,
+				status = change_status (
+					pitip->registry,
+					pitip->ical_comp,
+					pitip->to_address,
 					ICAL_PARTSTAT_DECLINED);
 			else {
 				prop = icalproperty_new_x ("1");
@@ -2718,7 +2800,8 @@ check_is_instance (icalcomponent *icalcomp)
 }
 
 static gboolean
-in_proper_folder (CamelFolder *folder)
+in_proper_folder (ESourceRegistry *registry,
+                  CamelFolder *folder)
 {
 	EShell *shell;
 	EShellBackend *shell_backend;
@@ -2746,17 +2829,17 @@ in_proper_folder (CamelFolder *folder)
 			  /* or any other virtual folder */
 			  CAMEL_IS_VEE_FOLDER (folder) ||
 			  /* or anything else except of sent, outbox or drafts folder */
-			  (!em_utils_folder_is_sent (folder) &&
-			   !em_utils_folder_is_outbox (folder) &&
-			   !em_utils_folder_is_drafts (folder))
+			  (!em_utils_folder_is_sent (registry, folder) &&
+			   !em_utils_folder_is_outbox (registry, folder) &&
+			   !em_utils_folder_is_drafts (registry, folder))
 			));
 	} else {
 		/* cannot check for Inbox folder here */
 		res = (folder->folder_flags & (CAMEL_FOLDER_IS_TRASH | CAMEL_FOLDER_IS_JUNK)) == 0 && (
 		      (CAMEL_IS_VEE_FOLDER (folder)) || (
-		      !em_utils_folder_is_sent (folder) &&
-		      !em_utils_folder_is_outbox (folder) &&
-		      !em_utils_folder_is_drafts (folder)));
+		      !em_utils_folder_is_sent (registry, folder) &&
+		      !em_utils_folder_is_outbox (registry, folder) &&
+		      !em_utils_folder_is_drafts (registry, folder)));
 	}
 
 	return res;
@@ -2768,6 +2851,7 @@ init_itip_view (ItipPURI *info,
 {
 	EShell *shell;
 	EShellSettings *shell_settings;
+	ESourceRegistry *registry;
 	ECalComponentText text;
 	ECalComponentOrganizer organizer;
 	ECalComponentDateTime datetime;
@@ -2782,29 +2866,27 @@ init_itip_view (ItipPURI *info,
 	EMFormat *emf = info->puri.emf;
 
 	shell = e_shell_get_default ();
+	registry = e_shell_get_registry (shell);
 	shell_settings = e_shell_get_shell_settings (shell);
 
+	info->registry = g_object_ref (registry);
+
         /* Reset current client before initializing view */
 	info->current_client = NULL;
 
-        /* Accounts */
-	info->accounts = e_get_account_list ();
-
-        /* Source Lists and open ecal clients */
-	for (i = 0; i < E_CAL_CLIENT_SOURCE_TYPE_LAST; i++) {
-		if (!e_cal_client_get_sources (&info->source_lists[i], i, NULL))
-                        /* FIXME More error handling? */
-			info->source_lists[i] = NULL;
-
-                /* Initialize the ecal hashes */
-		info->clients[i] = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, g_object_unref);
-	}
+	/* Initialize the ecal hashes */
+	for (i = 0; i < E_CAL_CLIENT_SOURCE_TYPE_LAST; i++)
+		info->clients[i] = g_hash_table_new_full (
+			(GHashFunc) g_str_hash,
+			(GEqualFunc) g_str_equal,
+			(GDestroyNotify) g_free,
+			(GDestroyNotify) g_object_unref);
 
         /* FIXME Handle multiple VEVENTS with the same UID, ie detached instances */
 	if (!extract_itip_data (info, view, &have_alarms))
 		return;
 
-	response_enabled = in_proper_folder (emf->folder);
+	response_enabled = in_proper_folder (registry, emf->folder);
 
 	if (!response_enabled) {
 		itip_view_set_mode (view, ITIP_VIEW_MODE_HIDE_ALL);
@@ -3119,11 +3201,12 @@ puri_free (EMFormatPURI *puri)
 	g_cancellable_cancel (pitip->cancellable);
 	g_object_unref (pitip->cancellable);
 
-	for (i = 0; i < E_CAL_CLIENT_SOURCE_TYPE_LAST; i++) {
-		if (pitip->source_lists[i])
-		g_object_unref (pitip->source_lists[i]);
-		pitip->source_lists[i] = NULL;
+	if (pitip->registry != NULL) {
+		g_object_unref (pitip->registry);
+		pitip->registry = NULL;
+	}
 
+	for (i = 0; i < E_CAL_CLIENT_SOURCE_TYPE_LAST; i++) {
 		g_hash_table_destroy (pitip->clients[i]);
 		pitip->clients[i] = NULL;
 	}
@@ -3179,18 +3262,19 @@ write_itip_view (EMFormat *emf,
 
 	if (info->mode == EM_FORMAT_WRITE_MODE_PRINTING) {
 		ItipView *view;
-		ItipPURI *ipuri;
+		ItipPURI *pitip;
 
 		buffer = g_string_sized_new (1024);
 
-		ipuri = (ItipPURI *) puri;
-		view = itip_view_new (ipuri);
+		pitip = (ItipPURI *) puri;
+		view = itip_view_new (pitip, pitip->registry);
 
-		init_itip_view (ipuri, view);
+		init_itip_view (pitip, view);
 		itip_view_write_for_printing (view, buffer);
 
                 /* Destroy the view when the formatter is destroyed */
-		g_object_weak_ref (G_OBJECT (emf), (GWeakNotify) g_object_unref, view);
+		g_object_weak_ref (
+			G_OBJECT (emf), (GWeakNotify) g_object_unref, view);
 
 	} else if (info->mode == EM_FORMAT_WRITE_MODE_RAW) {
 		buffer = g_string_sized_new (2048);
@@ -3228,6 +3312,7 @@ bind_itip_view (WebKitDOMElement *element,
                 EMFormatPURI *puri)
 {
 	if (WEBKIT_DOM_IS_HTML_IFRAME_ELEMENT (element)) {
+		ItipPURI *pitip = (ItipPURI *) puri;
 		GString *buffer = g_string_new ("");
 		WebKitDOMDocument *document;
 		ItipView *view;
@@ -3235,14 +3320,16 @@ bind_itip_view (WebKitDOMElement *element,
 		document = webkit_dom_html_iframe_element_get_content_document (
 				WEBKIT_DOM_HTML_IFRAME_ELEMENT (element));
 
-		view = itip_view_new ((ItipPURI *) puri);
-		g_object_set_data_full (G_OBJECT (element), "view", view,
-					(GDestroyNotify) g_object_unref);
+		view = itip_view_new (pitip, pitip->registry);
+
+		g_object_set_data_full (
+			G_OBJECT (element), "view", view,
+			(GDestroyNotify) g_object_unref);
 
 		itip_view_create_dom_bindings (view,
 			webkit_dom_document_get_document_element (document));
 
-		init_itip_view ((ItipPURI *) puri, view);
+		init_itip_view (pitip, view);
 		g_string_free (buffer, TRUE);
 	}
 }
@@ -3319,60 +3406,12 @@ delete_toggled_cb (GtkWidget *widget)
 	g_object_unref (settings);
 }
 
-static void
-initialize_selection (ESourceSelector *selector,
-                      ESourceList *source_list)
-{
-	GSList *groups;
-
-	for (groups = e_source_list_peek_groups (source_list); groups; groups = groups->next) {
-		ESourceGroup *group = E_SOURCE_GROUP (groups->data);
-		GSList *sources;
-		for (sources = e_source_group_peek_sources (group); sources; sources = sources->next) {
-			ESource *source = E_SOURCE (sources->data);
-			const gchar *completion = e_source_get_property (source, "conflict");
-			if (completion && !g_ascii_strcasecmp (completion, "true"))
-				e_source_selector_select_source (selector, source);
-		}
-	}
-}
-
-static void
-source_selection_changed (ESourceSelector *selector,
-                          gpointer data)
-{
-	ESourceList *source_list = data;
-	GSList *selection;
-	GSList *l;
-	GSList *groups;
-
-	/* first we clear all the completion flags from all sources */
-	for (groups = e_source_list_peek_groups (source_list); groups; groups = groups->next) {
-		ESourceGroup *group = E_SOURCE_GROUP (groups->data);
-		GSList *sources;
-		for (sources = e_source_group_peek_sources (group); sources; sources = sources->next) {
-			ESource *source = E_SOURCE (sources->data);
-
-			e_source_set_property (source, "conflict", NULL);
-		}
-	}
-
-	/* then we loop over the selector's selection, setting the
-	 * property on those sources */
-	selection = e_source_selector_get_selection (selector);
-	for (l = selection; l; l = l->next) {
-		e_source_set_property (E_SOURCE (l->data), "conflict", "true");
-	}
-	e_source_selector_free_selection (selection);
-
-	/* FIXME show an error if this fails? */
-	e_source_list_sync (source_list, NULL);
-}
-
 GtkWidget *
 itip_formatter_page_factory (EPlugin *ep,
                              EConfigHookItemFactoryData *hook_data)
 {
+	EShell *shell;
+	ESourceRegistry *registry;
 	GtkWidget *page;
 	GtkWidget *tab_label;
 	GtkWidget *frame;
@@ -3384,10 +3423,12 @@ itip_formatter_page_factory (EPlugin *ep,
 	GtkWidget *label;
 	GtkWidget *ess;
 	GtkWidget *scrolledwin;
-	ESourceList *source_list;
 	gchar *str;
 	GSettings *settings;
 
+	shell = e_shell_get_default ();
+	registry = e_shell_get_registry (shell);
+
 	/* Create a new notebook page */
 	page = gtk_vbox_new (FALSE, 0);
 	gtk_container_set_border_width (GTK_CONTAINER (page), 12);
@@ -3450,31 +3491,21 @@ itip_formatter_page_factory (EPlugin *ep,
 	gtk_misc_set_alignment (GTK_MISC (label), 0, 0.5);
 	gtk_box_pack_start (GTK_BOX (inner_vbox), label, FALSE, FALSE, 0);
 
-	if (!e_cal_client_get_sources (&source_list, E_CAL_CLIENT_SOURCE_TYPE_EVENTS, NULL)) {
-	    /* FIXME Error handling */;
-	}
-
 	scrolledwin = gtk_scrolled_window_new (NULL, NULL);
 
-	gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (scrolledwin),
-					GTK_POLICY_AUTOMATIC,
-					GTK_POLICY_AUTOMATIC);
-	gtk_scrolled_window_set_shadow_type (GTK_SCROLLED_WINDOW (scrolledwin),
-					     GTK_SHADOW_IN);
+	gtk_scrolled_window_set_policy (
+		GTK_SCROLLED_WINDOW (scrolledwin),
+		GTK_POLICY_AUTOMATIC, GTK_POLICY_AUTOMATIC);
+	gtk_scrolled_window_set_shadow_type (
+		GTK_SCROLLED_WINDOW (scrolledwin), GTK_SHADOW_IN);
 	gtk_box_pack_start (GTK_BOX (inner_vbox), scrolledwin, TRUE, TRUE, 0);
 
-	ess = e_source_selector_new (source_list);
+	ess = e_conflict_search_selector_new (registry);
 	atk_object_set_name (gtk_widget_get_accessible (ess), _("Conflict Search"));
 	gtk_container_add (GTK_CONTAINER (scrolledwin), ess);
 
-	initialize_selection (E_SOURCE_SELECTOR (ess), source_list);
-
-	g_signal_connect (
-		ess, "selection_changed",
-		G_CALLBACK (source_selection_changed), source_list);
-	g_object_weak_ref (G_OBJECT (page), (GWeakNotify) g_object_unref, source_list);
-
 	gtk_widget_show_all (page);
 
 	return page;
 }
+
diff --git a/plugins/itip-formatter/itip-view.c b/plugins/itip-formatter/itip-view.c
index 32fbf52..30ec171 100644
--- a/plugins/itip-formatter/itip-view.c
+++ b/plugins/itip-formatter/itip-view.c
@@ -33,7 +33,6 @@
 #include <libecal/e-cal-time-util.h>
 #include <mail/em-format-hook.h>
 #include <mail/em-format-html.h>
-#include <libedataserver/e-account-list.h>
 #include <e-util/e-util.h>
 #include <e-util/e-unicode.h>
 #include <calendar/gui/itip-utils.h>
@@ -59,10 +58,15 @@ typedef struct  {
 } ItipViewInfoItem;
 
 struct _ItipViewPrivate {
+	ESourceRegistry *registry;
+	gulong source_added_id;
+	gulong source_removed_id;
+	gchar *extension_name;
+
 	ItipViewMode mode;
 	ECalClientSourceType type;
 
-        gchar *sender;
+	gchar *sender;
 	gchar *organizer;
 	gchar *organizer_sentby;
 	gchar *delegator;
@@ -73,18 +77,18 @@ struct _ItipViewPrivate {
 	gchar *summary;
 
 	gchar *location;
-        gchar *status;
+	gchar *status;
 	gchar *comment;
 
 	struct tm *start_tm;
 	gint start_tm_is_date : 1;
-        gchar *start_label;
-        const gchar *start_header;
+	gchar *start_label;
+	const gchar *start_header;
 
 	struct tm *end_tm;
 	gint end_tm_is_date : 1;
-        gchar *end_label;
-        const gchar *end_header;
+	gchar *end_label;
+	const gchar *end_header;
 
 	GSList *upper_info_items;
 	GSList *lower_info_items;
@@ -93,18 +97,16 @@ struct _ItipViewPrivate {
 
 	gchar *description;
 
-	ESourceList *source_list;
-
 	gint buttons_sensitive : 1;
 
-        gboolean is_recur_set;
+	gboolean is_recur_set;
 
 	gint needs_decline : 1;
 
-        WebKitDOMDocument *dom_document;
-        ItipPURI *puri;
+	WebKitDOMDocument *dom_document;
+	ItipPURI *puri;
 
-        gchar *error;
+	gchar *error;
 };
 
 #define TEXT_ROW_SENDER "text_row_sender"
@@ -150,7 +152,12 @@ struct _ItipViewPrivate {
 #define DIV_ITIP_CONTENT "div_itip_content"
 #define DIV_ITIP_ERROR "div_itip_error"
 
-/* Signal IDs */
+enum {
+	PROP_0,
+	PROP_EXTENSION_NAME,
+	PROP_REGISTRY
+};
+
 enum {
 	SOURCE_SELECTED,
 	RESPONSE,
@@ -731,85 +738,6 @@ button_clicked_cb (WebKitDOMElement *element,
 }
 
 static void
-itip_view_finalize (GObject *object)
-{
-	ItipViewPrivate *priv;
-	GSList *iter;
-
-	priv = ITIP_VIEW_GET_PRIVATE (object);
-
-	d(printf("Itip view finalized!\n"));
-
-	g_free (priv->sender);
-	g_free (priv->organizer);
-	g_free (priv->organizer_sentby);
-	g_free (priv->delegator);
-	g_free (priv->attendee);
-	g_free (priv->attendee_sentby);
-	g_free (priv->proxy);
-	g_free (priv->summary);
-	g_free (priv->location);
-	g_free (priv->status);
-	g_free (priv->comment);
-	g_free (priv->start_tm);
-	g_free (priv->start_label);
-	g_free (priv->end_tm);
-	g_free (priv->end_label);
-	g_free (priv->description);
-	g_free (priv->error);
-
-	for (iter = priv->lower_info_items; iter; iter = iter->next) {
-		ItipViewInfoItem *item = iter->data;
-		g_free (item->message);
-		g_free (item);
-	}
-
-	g_slist_free (priv->lower_info_items);
-
-	for (iter = priv->upper_info_items; iter; iter = iter->next) {
-		ItipViewInfoItem *item = iter->data;
-		g_free (item->message);
-		g_free (item);
-	}
-
-	g_slist_free (priv->upper_info_items);
-
-	/* Chain up to parent's finalize() method. */
-	G_OBJECT_CLASS (itip_view_parent_class)->finalize (object);
-}
-
-static void
-itip_view_class_init (ItipViewClass *class)
-{
-	GObjectClass *object_class;
-
-	g_type_class_add_private (class, sizeof (ItipViewPrivate));
-
-	object_class = G_OBJECT_CLASS (class);
-	object_class->finalize = itip_view_finalize;
-
-	signals[SOURCE_SELECTED] = g_signal_new (
-		"source_selected",
-		G_TYPE_FROM_CLASS (class),
-		G_SIGNAL_RUN_LAST,
-		G_STRUCT_OFFSET (ItipViewClass, source_selected),
-		NULL, NULL,
-		g_cclosure_marshal_VOID__OBJECT,
-		G_TYPE_NONE, 1,
-		E_TYPE_SOURCE);
-
-	signals[RESPONSE] = g_signal_new (
-		"response",
-		G_TYPE_FROM_CLASS (class),
-		G_SIGNAL_RUN_LAST,
-		G_STRUCT_OFFSET (ItipViewClass, response),
-		NULL, NULL,
-		g_cclosure_marshal_VOID__INT,
-		G_TYPE_NONE, 1,
-		G_TYPE_INT);
-}
-
-static void
 rsvp_toggled_cb (WebKitDOMHTMLInputElement *input,
                  WebKitDOMEvent *event,
                  gpointer data)
@@ -873,10 +801,12 @@ source_changed_cb (WebKitDOMElement *select,
 {
 	ESource *source;
 
-	source = itip_view_get_source (view);
+	source = itip_view_ref_source (view);
 
 	d(printf("Source changed to '%s'\n", e_source_get_display_name (source)));
 	g_signal_emit (view, signals[SOURCE_SELECTED], 0, source);
+
+	g_object_unref (source);
 }
 
 static gchar *
@@ -1121,6 +1051,322 @@ append_buttons_table (GString *buffer)
 	g_string_append (buffer, "</tr></table>");
 }
 
+static void
+itip_view_rebuild_source_list (ItipView *view)
+{
+	ESourceRegistry *registry;
+	WebKitDOMElement *select;
+	GList *list, *link;
+	const gchar *extension_name;
+
+	d(printf("Assigning a new source list!\n"));
+
+	if (!view->priv->dom_document)
+		return;
+
+	registry = itip_view_get_registry (view);
+	extension_name = itip_view_get_extension_name (view);
+
+	select = webkit_dom_document_get_element_by_id (
+		view->priv->dom_document, SELECT_ESOURCE);
+
+	while (webkit_dom_node_has_child_nodes (WEBKIT_DOM_NODE (select))) {
+		webkit_dom_node_remove_child (
+			WEBKIT_DOM_NODE (select),
+			webkit_dom_node_get_last_child (WEBKIT_DOM_NODE (select)),
+			NULL);
+	}
+
+	if (extension_name == NULL)
+		return;
+
+	list = e_source_registry_list_sources (registry, extension_name);
+
+	for (link = list; link != NULL; link = g_list_next (link)) {
+		ESource *source = E_SOURCE (link->data);
+		WebKitDOMElement *option;
+
+		option = webkit_dom_document_create_element (
+			view->priv->dom_document, "OPTION", NULL);
+		webkit_dom_html_option_element_set_value (
+			WEBKIT_DOM_HTML_OPTION_ELEMENT (option),
+			e_source_get_uid (source));
+		webkit_dom_html_option_element_set_label (
+			WEBKIT_DOM_HTML_OPTION_ELEMENT (option),
+			e_source_get_display_name (source));
+		webkit_dom_html_element_set_inner_html (
+			WEBKIT_DOM_HTML_ELEMENT (option),
+			e_source_get_display_name (source), NULL);
+		webkit_dom_html_element_set_class_name (
+			WEBKIT_DOM_HTML_ELEMENT (option), "calendar");
+
+		webkit_dom_node_append_child (
+			WEBKIT_DOM_NODE (select),
+			WEBKIT_DOM_NODE (option),
+			NULL);
+	}
+
+	g_list_free_full (list, (GDestroyNotify) g_object_unref);
+
+	source_changed_cb (select, NULL, view);
+}
+
+static void
+itip_view_source_added_cb (ESourceRegistry *registry,
+                           ESource *source,
+                           ItipView *view)
+{
+	const gchar *extension_name;
+
+	extension_name = itip_view_get_extension_name (view);
+
+	/* If we don't have an extension name set
+	 * yet then disregard the signal emission. */
+	if (extension_name == NULL)
+		return;
+
+	if (e_source_has_extension (source, extension_name))
+		itip_view_rebuild_source_list (view);
+}
+
+static void
+itip_view_source_removed_cb (ESourceRegistry *registry,
+                             ESource *source,
+                             ItipView *view)
+{
+	const gchar *extension_name;
+
+	extension_name = itip_view_get_extension_name (view);
+
+	/* If we don't have an extension name set
+	 * yet then disregard the signal emission. */
+	if (extension_name == NULL)
+		return;
+
+	if (e_source_has_extension (source, extension_name))
+		itip_view_rebuild_source_list (view);
+}
+
+static void
+itip_view_set_registry (ItipView *view,
+                        ESourceRegistry *registry)
+{
+	g_return_if_fail (E_IS_SOURCE_REGISTRY (registry));
+	g_return_if_fail (view->priv->registry == NULL);
+
+	view->priv->registry = g_object_ref (registry);
+}
+
+static void
+itip_view_set_property (GObject *object,
+                        guint property_id,
+                        const GValue *value,
+                        GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_EXTENSION_NAME:
+			itip_view_set_extension_name (
+				ITIP_VIEW (object),
+				g_value_get_string (value));
+			return;
+
+		case PROP_REGISTRY:
+			itip_view_set_registry (
+				ITIP_VIEW (object),
+				g_value_get_object (value));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+itip_view_get_property (GObject *object,
+                        guint property_id,
+                        GValue *value,
+                        GParamSpec *pspec)
+{
+	switch (property_id) {
+		case PROP_EXTENSION_NAME:
+			g_value_set_string (
+				value, itip_view_get_extension_name (
+				ITIP_VIEW (object)));
+			return;
+
+		case PROP_REGISTRY:
+			g_value_set_object (
+				value, itip_view_get_registry (
+				ITIP_VIEW (object)));
+			return;
+	}
+
+	G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
+}
+
+static void
+itip_view_dispose (GObject *object)
+{
+	ItipViewPrivate *priv;
+
+	priv = ITIP_VIEW_GET_PRIVATE (object);
+
+	if (priv->registry != NULL) {
+		g_signal_handler_disconnect (
+			priv->registry, priv->source_added_id);
+		g_signal_handler_disconnect (
+			priv->registry, priv->source_removed_id);
+		g_object_unref (priv->registry);
+		priv->registry = NULL;
+	}
+
+	/* Chain up to parent's dispose() method. */
+	G_OBJECT_CLASS (itip_view_parent_class)->dispose (object);
+}
+
+static void
+itip_view_finalize (GObject *object)
+{
+	ItipViewPrivate *priv;
+	GSList *iter;
+
+	priv = ITIP_VIEW_GET_PRIVATE (object);
+
+	d(printf("Itip view finalized!\n"));
+
+	g_free (priv->extension_name);
+	g_free (priv->sender);
+	g_free (priv->organizer);
+	g_free (priv->organizer_sentby);
+	g_free (priv->delegator);
+	g_free (priv->attendee);
+	g_free (priv->attendee_sentby);
+	g_free (priv->proxy);
+	g_free (priv->summary);
+	g_free (priv->location);
+	g_free (priv->status);
+	g_free (priv->comment);
+	g_free (priv->start_tm);
+	g_free (priv->start_label);
+	g_free (priv->end_tm);
+	g_free (priv->end_label);
+	g_free (priv->description);
+	g_free (priv->error);
+
+	for (iter = priv->lower_info_items; iter; iter = iter->next) {
+		ItipViewInfoItem *item = iter->data;
+		g_free (item->message);
+		g_free (item);
+	}
+
+	g_slist_free (priv->lower_info_items);
+
+	for (iter = priv->upper_info_items; iter; iter = iter->next) {
+		ItipViewInfoItem *item = iter->data;
+		g_free (item->message);
+		g_free (item);
+	}
+
+	g_slist_free (priv->upper_info_items);
+
+	/* Chain up to parent's finalize() method. */
+	G_OBJECT_CLASS (itip_view_parent_class)->finalize (object);
+}
+
+static void
+itip_view_constructed (GObject *object)
+{
+	ItipView *view;
+	ESourceRegistry *registry;
+
+	view = ITIP_VIEW (object);
+	registry = itip_view_get_registry (view);
+
+	view->priv->source_added_id = g_signal_connect (
+		registry, "source-added",
+		G_CALLBACK (itip_view_source_added_cb), view);
+
+	view->priv->source_removed_id = g_signal_connect (
+		registry, "source-removed",
+		G_CALLBACK (itip_view_source_removed_cb), view);
+
+	/* Chain up to parent's constructed() method. */
+	G_OBJECT_CLASS (itip_view_parent_class)->constructed (object);
+}
+
+static void
+itip_view_class_init (ItipViewClass *class)
+{
+	GObjectClass *object_class;
+
+	g_type_class_add_private (class, sizeof (ItipViewPrivate));
+
+	object_class = G_OBJECT_CLASS (class);
+	object_class->set_property = itip_view_set_property;
+	object_class->get_property = itip_view_get_property;
+	object_class->dispose = itip_view_dispose;
+	object_class->finalize = itip_view_finalize;
+	object_class->constructed = itip_view_constructed;
+
+	g_object_class_install_property (
+		object_class,
+		PROP_REGISTRY,
+		g_param_spec_string (
+			"extension-name",
+			"Extension Name",
+			"Show only data sources with this extension",
+			NULL,
+			G_PARAM_READWRITE));
+
+	g_object_class_install_property (
+		object_class,
+		PROP_REGISTRY,
+		g_param_spec_object (
+			"registry",
+			"Registry",
+			"Data source registry",
+			E_TYPE_SOURCE_REGISTRY,
+			G_PARAM_READWRITE |
+			G_PARAM_CONSTRUCT_ONLY));
+
+	signals[SOURCE_SELECTED] = g_signal_new (
+		"source_selected",
+		G_TYPE_FROM_CLASS (class),
+		G_SIGNAL_RUN_LAST,
+		G_STRUCT_OFFSET (ItipViewClass, source_selected),
+		NULL, NULL,
+		g_cclosure_marshal_VOID__OBJECT,
+		G_TYPE_NONE, 1,
+		E_TYPE_SOURCE);
+
+	signals[RESPONSE] = g_signal_new (
+		"response",
+		G_TYPE_FROM_CLASS (class),
+		G_SIGNAL_RUN_LAST,
+		G_STRUCT_OFFSET (ItipViewClass, response),
+		NULL, NULL,
+		g_cclosure_marshal_VOID__INT,
+		G_TYPE_NONE, 1,
+		G_TYPE_INT);
+}
+
+static void
+itip_view_init (ItipView *view)
+{
+	view->priv = ITIP_VIEW_GET_PRIVATE (view);
+}
+
+ItipView *
+itip_view_new (ItipPURI *puri,
+               ESourceRegistry *registry)
+{
+	ItipView *view;
+
+	view = g_object_new (ITIP_TYPE_VIEW, "registry", registry, NULL);
+	view->priv->puri = puri;
+
+	return view;
+}
+
 void
 itip_view_write (GString *buffer)
 {
@@ -1394,29 +1640,46 @@ itip_view_create_dom_bindings (ItipView *view,
 	}
 }
 
-static void
-itip_view_init (ItipView *view)
+ItipPURI *
+itip_view_get_puri (ItipView *view)
 {
-	view->priv = ITIP_VIEW_GET_PRIVATE (view);
+	g_return_val_if_fail (ITIP_IS_VIEW (view), NULL);
+
+	return view->priv->puri;
 }
 
-ItipView *
-itip_view_new (ItipPURI *puri)
+ESourceRegistry *
+itip_view_get_registry (ItipView *view)
 {
-	ItipView *view;
-
-	view = ITIP_VIEW (g_object_new (ITIP_TYPE_VIEW, NULL));
-	view->priv->puri = puri;
+	g_return_val_if_fail (ITIP_IS_VIEW (view), NULL);
 
-	return view;
+	return view->priv->registry;
 }
 
-ItipPURI *
-itip_view_get_puri (ItipView *view)
+const gchar *
+itip_view_get_extension_name (ItipView *view)
 {
 	g_return_val_if_fail (ITIP_IS_VIEW (view), NULL);
 
-	return view->priv->puri;
+	return view->priv->extension_name;
+}
+
+void
+itip_view_set_extension_name (ItipView *view,
+                              const gchar *extension_name)
+{
+	g_return_if_fail (ITIP_IS_VIEW (view));
+
+	/* Avoid unnecessary rebuilds. */
+	if (g_strcmp0 (extension_name, view->priv->extension_name) == 0)
+		return;
+
+	g_free (view->priv->extension_name);
+	view->priv->extension_name = g_strdup (extension_name);
+
+	g_object_notify (G_OBJECT (view), "extension-name");
+
+	itip_view_rebuild_source_list (view);
 }
 
 static void
@@ -2160,119 +2423,13 @@ itip_view_clear_lower_info_items (ItipView *view)
 	priv->lower_info_items = NULL;
 }
 
-static void
-source_list_changed_cb (ESourceList *source_list,
-                        ItipView *view)
-{
-	GSList *groups, *iter;
-	WebKitDOMElement *select;
-
-	d(printf("Assigning a new source list!\n"));
-
-	if (!view->priv->dom_document)
-		return;
-
-	select = webkit_dom_document_get_element_by_id (
-		view->priv->dom_document, SELECT_ESOURCE);
-
-	while (webkit_dom_node_has_child_nodes (WEBKIT_DOM_NODE (select))) {
-		webkit_dom_node_remove_child (
-			WEBKIT_DOM_NODE (select),
-			webkit_dom_node_get_last_child (WEBKIT_DOM_NODE (select)),
-			NULL);
-	}
-
-	groups = e_source_list_peek_groups (source_list);
-	for (iter = groups; iter; iter = iter->next) {
-
-		ESourceGroup *group = iter->data;
-		GSList *sources, *iter2;
-		WebKitDOMElement *optgroup;
-
-		sources = e_source_group_peek_sources (group);
-		if (sources == NULL)
-			continue;
-
-		optgroup = webkit_dom_document_create_element (
-			view->priv->dom_document, "OPTGROUP", NULL);
-		webkit_dom_html_opt_group_element_set_label (
-			WEBKIT_DOM_HTML_OPT_GROUP_ELEMENT (optgroup),
-			e_source_group_peek_name (group));
-
-		webkit_dom_node_append_child (
-			WEBKIT_DOM_NODE (select),
-			WEBKIT_DOM_NODE (optgroup),
-			NULL);
-
-		for (iter2 = sources; iter2; iter2 = iter2->next) {
-
-			WebKitDOMElement *option;
-			ESource *source = iter2->data;
-
-			option = webkit_dom_document_create_element (
-				view->priv->dom_document, "OPTION", NULL);
-			webkit_dom_html_option_element_set_value (
-				WEBKIT_DOM_HTML_OPTION_ELEMENT (option),
-				e_source_get_uid (source));
-			webkit_dom_html_option_element_set_label (
-				WEBKIT_DOM_HTML_OPTION_ELEMENT (option),
-				e_source_get_display_name (source));
-			webkit_dom_html_element_set_inner_html (
-				WEBKIT_DOM_HTML_ELEMENT (option),
-				e_source_get_display_name (source), NULL);
-			webkit_dom_html_element_set_class_name (
-				WEBKIT_DOM_HTML_ELEMENT (option), "calendar");
-
-			webkit_dom_node_append_child (
-				WEBKIT_DOM_NODE (optgroup),
-				WEBKIT_DOM_NODE (option),
-				NULL);
-		}
-	}
-
-	source_changed_cb (select, NULL, view);
-}
-
-void
-itip_view_set_source_list (ItipView *view,
-                           ESourceList *source_list)
-{
-	ItipViewPrivate *priv;
-
-	g_return_if_fail (ITIP_IS_VIEW (view));
-
-	priv = view->priv;
-
-	if (priv->source_list)
-		g_object_unref (priv->source_list);
-
-	if (!source_list) {
-		priv->source_list = NULL;
-		return;
-	}
-
-	priv->source_list = g_object_ref (source_list);
-
-	source_list_changed_cb (source_list, view);
-
-	g_signal_connect (source_list, "changed",
-		G_CALLBACK (source_list_changed_cb), view);
-}
-
-ESourceList *
-itip_view_get_source_list (ItipView *view)
-{
-	g_return_val_if_fail (ITIP_IS_VIEW (view), NULL);
-
-	return view->priv->source_list;
-}
-
 void
 itip_view_set_source (ItipView *view,
                       ESource *source)
 {
 	WebKitDOMElement *select;
 	WebKitDOMElement *row;
+	ESource *selected_source;
 	gulong i, len;
 
 	g_return_if_fail (ITIP_IS_VIEW (view));
@@ -2292,12 +2449,14 @@ itip_view_set_source (ItipView *view,
 	select = webkit_dom_document_get_element_by_id (
 		view->priv->dom_document, SELECT_ESOURCE);
 
-        /* <select> does not emit 'change' event when already selected <option>
-         * is re-selected, but we need to notify itip formatter, so that it would
-         * make all the buttons sensitive */
-	if (source == itip_view_get_source (view)) {
+	/* <select> does not emit 'change' event when already selected
+	 * <option> is re-selected, but we need to notify itip formatter,
+	 * so that it would make all the buttons sensitive. */
+	selected_source = itip_view_ref_source (view);
+	if (source == selected_source)
 		source_changed_cb (select, NULL, view);
-	}
+	if (selected_source != NULL)
+		g_object_unref (selected_source);
 
 	if (webkit_dom_html_select_element_get_disabled (
 			WEBKIT_DOM_HTML_SELECT_ELEMENT (select))) {
@@ -2331,8 +2490,9 @@ itip_view_set_source (ItipView *view,
 }
 
 ESource *
-itip_view_get_source (ItipView *view)
+itip_view_ref_source (ItipView *view)
 {
+	ESourceRegistry *registry;
 	WebKitDOMElement *select;
 	gchar *uid;
 	ESource *source;
@@ -2355,8 +2515,9 @@ itip_view_get_source (ItipView *view)
 	uid = webkit_dom_html_select_element_get_value (
 		WEBKIT_DOM_HTML_SELECT_ELEMENT (select));
 
-	source = e_source_list_peek_source_by_uid (
-		view->priv->source_list, uid);
+	registry = itip_view_get_registry (view);
+	source = e_source_registry_ref_source (registry, uid);
+
 	g_free (uid);
 
 	if (disable) {
@@ -2902,4 +3063,3 @@ itip_view_set_error (ItipView *view,
 			G_CALLBACK (button_clicked_cb), FALSE, view);
 	}
 }
-
diff --git a/plugins/itip-formatter/itip-view.h b/plugins/itip-formatter/itip-view.h
index 33f6f6f..d7ebd5b 100644
--- a/plugins/itip-formatter/itip-view.h
+++ b/plugins/itip-formatter/itip-view.h
@@ -27,9 +27,9 @@
 #include <stdarg.h>
 #include <unistd.h>
 #include <gtk/gtk.h>
-#include <libedataserver/e-source-list.h>
-#include <libecal/e-cal-client.h>
 #include <webkit/webkitdom.h>
+#include <libecal/e-cal-client.h>
+#include <libedataserver/e-source-registry.h>
 
 /* Standard GObject macros */
 #define ITIP_TYPE_VIEW \
@@ -105,13 +105,19 @@ struct _ItipViewClass {
 };
 
 GType		itip_view_get_type		(void);
-ItipView *	itip_view_new			(ItipPURI *puri);
+ItipView *	itip_view_new			(ItipPURI *puri,
+						 ESourceRegistry *registry);
 void		itip_view_write			(GString *buffer);
 void		itip_view_write_for_printing	(ItipView *view,
 						 GString *buffer);
 void		itip_view_create_dom_bindings	(ItipView *view,
 						 WebKitDOMElement *element);
 ItipPURI *	itip_view_get_puri		(ItipView *view);
+ESourceRegistry *
+		itip_view_get_registry		(ItipView *view);
+const gchar *	itip_view_get_extension_name	(ItipView *view);
+void		itip_view_set_extension_name	(ItipView *view,
+						 const gchar *extension_name);
 ItipViewMode	itip_view_get_mode		(ItipView *view);
 void		itip_view_set_mode		(ItipView *view,
 						 ItipViewMode mode);
@@ -190,10 +196,7 @@ void		itip_view_remove_lower_info_item
 						 guint id);
 void		itip_view_clear_lower_info_items
 						(ItipView *view);
-ESourceList *	itip_view_get_source_list	(ItipView *view);
-void		itip_view_set_source_list	(ItipView *view,
-						 ESourceList *source_list);
-ESource *	itip_view_get_source		(ItipView *view);
+ESource *	itip_view_ref_source		(ItipView *view);
 void		itip_view_set_source		(ItipView *view,
 						 ESource *source);
 gboolean	itip_view_get_rsvp		(ItipView *view);



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