From 22a02f891220f637ec1b451b517f25b69cbe8b01 Mon Sep 17 00:00:00 2001
From: Ted Gould <ted@canonical.com>
Date: Wed, 7 Oct 2009 11:57:52 -0400
Subject: Adding throttle and unthrottle functions

---
 src/lock-helper.c | 79 +++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/lock-helper.h |  3 +++
 2 files changed, 82 insertions(+)

(limited to 'src')

diff --git a/src/lock-helper.c b/src/lock-helper.c
index 5f32c0c..b202b9d 100644
--- a/src/lock-helper.c
+++ b/src/lock-helper.c
@@ -24,6 +24,8 @@ with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 static DBusGProxy * gss_proxy = NULL;
 static GMainLoop * gss_mainloop = NULL;
+static guint cookie = 0;
+static DBusGProxyCall * cookie_call = NULL;
 
 static DBusGProxy * gdm_settings_proxy = NULL;
 static gboolean gdm_auto_login = FALSE;
@@ -33,6 +35,83 @@ static gboolean is_guest = FALSE;
 
 static gdm_autologin_cb_t gdm_autologin_cb = NULL;
 
+/* Checks to see if there is an error and reports
+   it.  Not much else we can do. */
+static void
+unthrottle_return (DBusGProxy * proxy, DBusGProxyCall * call, gpointer data)
+{
+	GError * error = NULL;
+	dbus_g_proxy_end_call(proxy, call, &error,
+	                      G_TYPE_INVALID);
+
+	if (error != NULL) {
+		g_warning("Unable to unthrottle: %s", error->message);
+	}
+	return;
+}
+
+/* Sends an unthrottle if we're throttled. */
+void
+screensaver_unthrottle (void)
+{
+	g_return_if_fail(cookie != 0);
+
+	dbus_g_proxy_begin_call(gss_proxy, "UnThrottle",
+	                        unthrottle_return, NULL,
+	                        NULL,
+	                        G_TYPE_UINT, cookie,
+	                        G_TYPE_INVALID);
+
+	cookie = 0;
+	return;
+}
+
+/* Gets there return cookie from the throttle command
+   and sets things valid */
+static void
+throttle_return (DBusGProxy * proxy, DBusGProxyCall * call, gpointer data)
+{
+	GError * error = NULL;
+	cookie_call = NULL;
+
+	dbus_g_proxy_end_call(proxy, call, &error,
+	                      G_TYPE_UINT, &cookie,
+	                      G_TYPE_INVALID);
+
+	if (error != NULL) {
+		g_warning("Unable to throttle the screensaver: %s", error->message);
+		return;
+	}
+
+
+	if (cookie == 0) {
+		g_warning("We didn't get a throttle cookie!");
+	}
+
+	return;
+}
+
+/* Throttling the screensaver by using the screen saver
+   command. */
+void
+screensaver_throttle (gchar * reason)
+{
+	g_return_if_fail(cookie_call == NULL);
+	g_return_if_fail(will_lock_screen());
+
+	if (cookie != 0) {
+		screensaver_unthrottle();
+	}
+
+	cookie_call = dbus_g_proxy_begin_call(gss_proxy, "Throttle",
+	                                      throttle_return, NULL,
+	                                      NULL,
+	                                      G_TYPE_STRING, reason,
+	                                      G_TYPE_INVALID);
+
+	return;
+}
+
 /* Setting up a call back */
 void
 lock_screen_gdm_cb_set (gdm_autologin_cb_t cb)
diff --git a/src/lock-helper.h b/src/lock-helper.h
index f9405ac..b4a382e 100644
--- a/src/lock-helper.h
+++ b/src/lock-helper.h
@@ -26,6 +26,9 @@ with this program.  If not, see <http://www.gnu.org/licenses/>.
 
 typedef void (*gdm_autologin_cb_t) (void);
 
+void screensaver_throttle (gchar * reason);
+void screensaver_unthrottle (void);
+
 gboolean will_lock_screen (void);
 void lock_screen (DbusmenuMenuitem * mi, gpointer data);
 gboolean lock_screen_setup (gpointer data);
-- 
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