Ignore false GObject property change notifications

This is related to bug 698275, which did not cover all cases.
The problem here is that the dconf can in certain situation claim
that everything changed (path "/" changed), which GSettingsBinding
propagates to a GObject property unconditionally and GObject's
property setter (g_object_set_property()) also notifies about
the property change unconditionally, despite the real descendant
property setter properly checks for the value change. After all
these false notifications a callback on "notify" signal is called
and possibly an expensive operation is run.

Checking whether the value really changed helps in performance, for
which were added new e-util functions:
   e_signal_connect_notify()
   e_signal_connect_notify_after()
   e_signal_connect_notify_swapped()
   e_signal_connect_notify_object()
which have the same prototype as their GLib counterparts, but they allow
only "notify::..." signals and they test whether the value really changed
before they call the registered callback.

6 files changed, 9 insertions, 9 deletions

diff --git a/modules/calendar/e-cal-shell-content.c b/modules/calendar/e-cal-shell-content.c
index 8029cc8f0a..5d1066edf1 100644
--- a/modules/calendar/e-cal-shell-content.c
+++ b/modules/calendar/e-cal-shell-content.c
@@ -407,7 +407,7 @@ cal_shell_content_constructed (GObject *object)
 	for (ii = 0; ii < GNOME_CAL_LAST_VIEW; ii++) {
 		calendar_view = gnome_calendar_get_calendar_view (calendar, ii);
 
-		g_signal_connect (
+		e_signal_connect_notify (
 			calendar_view, "notify::is-editing",
 			G_CALLBACK (cal_shell_content_is_editing_changed_cb), shell_view);
 
@@ -465,7 +465,7 @@ cal_shell_content_constructed (GObject *object)
 		G_CALLBACK (e_cal_shell_view_taskpad_open_task),
 		shell_view);
 
-	g_signal_connect (
+	e_signal_connect_notify (
 		widget, "notify::is-editing",
 		G_CALLBACK (cal_shell_content_is_editing_changed_cb), shell_view);
 
@@ -511,7 +511,7 @@ cal_shell_content_constructed (GObject *object)
 		G_CALLBACK (e_cal_shell_view_memopad_open_memo),
 		shell_view);
 
-	g_signal_connect (
+	e_signal_connect_notify (
 		widget, "notify::is-editing",
 		G_CALLBACK (cal_shell_content_is_editing_changed_cb), shell_view);
 
@@ -527,7 +527,7 @@ cal_shell_content_constructed (GObject *object)
 	e_shell_view_set_view_instance (shell_view, view_instance);
 	g_object_unref (view_instance);
 
-	g_signal_connect_swapped (
+	e_signal_connect_notify_swapped (
 		shell_view, "notify::view-id",
 		G_CALLBACK (cal_shell_content_notify_view_id_cb),
 		object);
diff --git a/modules/calendar/e-cal-shell-view-private.c b/modules/calendar/e-cal-shell-view-private.c
index bd3b943274..04c6c7a11f 100644
--- a/modules/calendar/e-cal-shell-view-private.c
+++ b/modules/calendar/e-cal-shell-view-private.c
@@ -431,7 +431,7 @@ cal_shell_view_notify_view_id_cb (EShellView *shell_view)
 void
 e_cal_shell_view_private_init (ECalShellView *cal_shell_view)
 {
-	g_signal_connect (
+	e_signal_connect_notify (
 		cal_shell_view, "notify::view-id",
 		G_CALLBACK (cal_shell_view_notify_view_id_cb), NULL);
 }
diff --git a/modules/calendar/e-memo-shell-content.c b/modules/calendar/e-memo-shell-content.c
index 95be0dc7db..4b0c4b577f 100644
--- a/modules/calendar/e-memo-shell-content.c
+++ b/modules/calendar/e-memo-shell-content.c
@@ -533,7 +533,7 @@ memo_shell_content_constructed (GObject *object)
 		G_CALLBACK (memo_shell_content_selection_change_cb),
 		object);
 
-	g_signal_connect (
+	e_signal_connect_notify (
 		priv->memo_table, "notify::is-editing",
 		G_CALLBACK (memo_shell_content_is_editing_changed_cb), shell_view);
 
diff --git a/modules/calendar/e-memo-shell-view-private.c b/modules/calendar/e-memo-shell-view-private.c
index a389c6686f..8a92ef5201 100644
--- a/modules/calendar/e-memo-shell-view-private.c
+++ b/modules/calendar/e-memo-shell-view-private.c
@@ -143,7 +143,7 @@ memo_shell_view_notify_view_id_cb (EShellView *shell_view)
 void
 e_memo_shell_view_private_init (EMemoShellView *memo_shell_view)
 {
-	g_signal_connect (
+	e_signal_connect_notify (
 		memo_shell_view, "notify::view-id",
 		G_CALLBACK (memo_shell_view_notify_view_id_cb), NULL);
 }
diff --git a/modules/calendar/e-task-shell-content.c b/modules/calendar/e-task-shell-content.c
index a7c2981849..aa31281433 100644
--- a/modules/calendar/e-task-shell-content.c
+++ b/modules/calendar/e-task-shell-content.c
@@ -530,7 +530,7 @@ task_shell_content_constructed (GObject *object)
 		G_CALLBACK (task_shell_content_selection_change_cb),
 		object);
 
-	g_signal_connect (
+	e_signal_connect_notify (
 		priv->task_table, "notify::is-editing",
 		G_CALLBACK (task_shell_content_is_editing_changed_cb), shell_view);
 
diff --git a/modules/calendar/e-task-shell-view-private.c b/modules/calendar/e-task-shell-view-private.c
index 6e2a8dac3c..863fd0136e 100644
--- a/modules/calendar/e-task-shell-view-private.c
+++ b/modules/calendar/e-task-shell-view-private.c
@@ -210,7 +210,7 @@ task_shell_view_notify_view_id_cb (EShellView *shell_view)
 void
 e_task_shell_view_private_init (ETaskShellView *task_shell_view)
 {
-	g_signal_connect (
+	e_signal_connect_notify (
 		task_shell_view, "notify::view-id",
 		G_CALLBACK (task_shell_view_notify_view_id_cb), NULL);
 }