first commit

1 files changed, 680 insertions, 0 deletions

diff --git a/src/gs-watcher-x11.c b/src/gs-watcher-x11.c
new file mode 100644
index 0000000..1e3114e
--- /dev/null
+++ b/src/gs-watcher-x11.c
@@ -0,0 +1,680 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 8 -*-
+ *
+ * Copyright (C) 2004-2006 William Jon McCann <[email protected]>
+ * Copyright (C) 2008      Red Hat, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Authors: William Jon McCann <[email protected]>
+ *
+ */
+
+#include "config.h"
+#include <stdlib.h>
+#include <stdio.h>
+#include <time.h>
+#include <errno.h>
+
+#include <string.h>
+#include <gdk/gdkx.h>
+
+#include <dbus/dbus.h>
+#include <dbus/dbus-glib.h>
+
+#include "gs-watcher.h"
+#include "gs-marshal.h"
+#include "gs-debug.h"
+
+static void     gs_watcher_class_init (GSWatcherClass *klass);
+static void     gs_watcher_init       (GSWatcher      *watcher);
+static void     gs_watcher_finalize   (GObject        *object);
+
+static gboolean watchdog_timer        (GSWatcher      *watcher);
+
+#define GS_WATCHER_GET_PRIVATE(o) (G_TYPE_INSTANCE_GET_PRIVATE ((o), GS_TYPE_WATCHER, GSWatcherPrivate))
+
+struct GSWatcherPrivate
+{
+	/* settings */
+	guint           enabled : 1;
+	guint           delta_notice_timeout;
+
+	/* state */
+	guint           active : 1;
+	guint           idle : 1;
+	guint           idle_notice : 1;
+
+	guint           idle_id;
+	char           *status_message;
+
+	DBusGProxy     *presence_proxy;
+	guint           watchdog_timer_id;
+};
+
+enum
+{
+    PROP_0,
+    PROP_STATUS_MESSAGE
+};
+
+enum
+{
+    IDLE_CHANGED,
+    IDLE_NOTICE_CHANGED,
+    LAST_SIGNAL
+};
+
+static guint signals [LAST_SIGNAL] = { 0, };
+
+G_DEFINE_TYPE (GSWatcher, gs_watcher, G_TYPE_OBJECT)
+
+static void
+remove_watchdog_timer (GSWatcher *watcher)
+{
+	if (watcher->priv->watchdog_timer_id != 0)
+	{
+		g_source_remove (watcher->priv->watchdog_timer_id);
+		watcher->priv->watchdog_timer_id = 0;
+	}
+}
+
+static void
+add_watchdog_timer (GSWatcher *watcher,
+                    glong      timeout)
+{
+	watcher->priv->watchdog_timer_id = g_timeout_add (timeout,
+	                                   (GSourceFunc)watchdog_timer,
+	                                   watcher);
+}
+
+static void
+gs_watcher_get_property (GObject    *object,
+                         guint       prop_id,
+                         GValue     *value,
+                         GParamSpec *pspec)
+{
+	GSWatcher *self;
+
+	self = GS_WATCHER (object);
+
+	switch (prop_id)
+	{
+	case PROP_STATUS_MESSAGE:
+		g_value_set_string (value, self->priv->status_message);
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+static void
+set_status_text (GSWatcher  *watcher,
+                 const char *text)
+{
+	g_free (watcher->priv->status_message);
+
+	watcher->priv->status_message = g_strdup (text);
+	g_object_notify (G_OBJECT (watcher), "status-message");
+}
+
+static void
+gs_watcher_set_property (GObject          *object,
+                         guint             prop_id,
+                         const GValue     *value,
+                         GParamSpec       *pspec)
+{
+	GSWatcher *self;
+
+	self = GS_WATCHER (object);
+
+	switch (prop_id)
+	{
+	case PROP_STATUS_MESSAGE:
+		set_status_text (self, g_value_get_string (value));
+		break;
+	default:
+		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+		break;
+	}
+}
+
+static void
+gs_watcher_class_init (GSWatcherClass *klass)
+{
+	GObjectClass   *object_class = G_OBJECT_CLASS (klass);
+
+	object_class->finalize = gs_watcher_finalize;
+	object_class->get_property = gs_watcher_get_property;
+	object_class->set_property = gs_watcher_set_property;
+
+	g_object_class_install_property (object_class,
+	                                 PROP_STATUS_MESSAGE,
+	                                 g_param_spec_string ("status-message",
+	                                         NULL,
+	                                         NULL,
+	                                         NULL,
+	                                         G_PARAM_READWRITE));
+
+	signals [IDLE_CHANGED] =
+	    g_signal_new ("idle-changed",
+	                  G_TYPE_FROM_CLASS (object_class),
+	                  G_SIGNAL_RUN_LAST,
+	                  G_STRUCT_OFFSET (GSWatcherClass, idle_changed),
+	                  NULL,
+	                  NULL,
+	                  gs_marshal_BOOLEAN__BOOLEAN,
+	                  G_TYPE_BOOLEAN,
+	                  1, G_TYPE_BOOLEAN);
+	signals [IDLE_NOTICE_CHANGED] =
+	    g_signal_new ("idle-notice-changed",
+	                  G_TYPE_FROM_CLASS (object_class),
+	                  G_SIGNAL_RUN_LAST,
+	                  G_STRUCT_OFFSET (GSWatcherClass, idle_notice_changed),
+	                  NULL,
+	                  NULL,
+	                  gs_marshal_BOOLEAN__BOOLEAN,
+	                  G_TYPE_BOOLEAN,
+	                  1, G_TYPE_BOOLEAN);
+
+	g_type_class_add_private (klass, sizeof (GSWatcherPrivate));
+}
+
+static gboolean
+_gs_watcher_set_session_idle_notice (GSWatcher *watcher,
+                                     gboolean   in_effect)
+{
+	gboolean res;
+
+	res = FALSE;
+
+	if (in_effect != watcher->priv->idle_notice)
+	{
+
+		g_signal_emit (watcher, signals [IDLE_NOTICE_CHANGED], 0, in_effect, &res);
+		if (res)
+		{
+			gs_debug ("Changing idle notice state: %d", in_effect);
+
+			watcher->priv->idle_notice = in_effect;
+		}
+		else
+		{
+			gs_debug ("Idle notice signal not handled: %d", in_effect);
+		}
+	}
+
+	return res;
+}
+
+static gboolean
+_gs_watcher_set_session_idle (GSWatcher *watcher,
+                              gboolean   is_idle)
+{
+	gboolean res;
+
+	res = FALSE;
+
+	if (is_idle != watcher->priv->idle)
+	{
+
+		g_signal_emit (watcher, signals [IDLE_CHANGED], 0, is_idle, &res);
+		if (res)
+		{
+			gs_debug ("Changing idle state: %d", is_idle);
+
+			watcher->priv->idle = is_idle;
+		}
+		else
+		{
+			gs_debug ("Idle changed signal not handled: %d", is_idle);
+		}
+	}
+
+	return res;
+}
+
+gboolean
+gs_watcher_get_active (GSWatcher *watcher)
+{
+	gboolean active;
+
+	g_return_val_if_fail (GS_IS_WATCHER (watcher), FALSE);
+
+	active = watcher->priv->active;
+
+	return active;
+}
+
+static void
+_gs_watcher_reset_state (GSWatcher *watcher)
+{
+	watcher->priv->idle = FALSE;
+	watcher->priv->idle_notice = FALSE;
+}
+
+static gboolean
+_gs_watcher_set_active_internal (GSWatcher *watcher,
+                                 gboolean   active)
+{
+	if (active != watcher->priv->active)
+	{
+		/* reset state */
+		_gs_watcher_reset_state (watcher);
+
+		watcher->priv->active = active;
+	}
+
+	return TRUE;
+}
+
+gboolean
+gs_watcher_set_active (GSWatcher *watcher,
+                       gboolean   active)
+{
+	g_return_val_if_fail (GS_IS_WATCHER (watcher), FALSE);
+
+	gs_debug ("turning watcher: %s", active ? "ON" : "OFF");
+
+	if (watcher->priv->active == active)
+	{
+		gs_debug ("Idle detection is already %s",
+		          active ? "active" : "inactive");
+		return FALSE;
+	}
+
+	if (! watcher->priv->enabled)
+	{
+		gs_debug ("Idle detection is disabled, cannot activate");
+		return FALSE;
+	}
+
+	return _gs_watcher_set_active_internal (watcher, active);
+}
+
+gboolean
+gs_watcher_set_enabled (GSWatcher *watcher,
+                        gboolean   enabled)
+{
+	g_return_val_if_fail (GS_IS_WATCHER (watcher), FALSE);
+
+	if (watcher->priv->enabled != enabled)
+	{
+		gboolean is_active = gs_watcher_get_active (watcher);
+
+		watcher->priv->enabled = enabled;
+
+		/* if we are disabling the watcher and we are
+		   active shut it down */
+		if (! enabled && is_active)
+		{
+			_gs_watcher_set_active_internal (watcher, FALSE);
+		}
+	}
+
+	return TRUE;
+}
+
+gboolean
+gs_watcher_get_enabled (GSWatcher *watcher)
+{
+	gboolean enabled;
+
+	g_return_val_if_fail (GS_IS_WATCHER (watcher), FALSE);
+
+	enabled = watcher->priv->enabled;
+
+	return enabled;
+}
+
+static gboolean
+on_idle_timeout (GSWatcher *watcher)
+{
+	gboolean res;
+
+	res = _gs_watcher_set_session_idle (watcher, TRUE);
+
+	_gs_watcher_set_session_idle_notice (watcher, FALSE);
+
+	/* try again if we failed i guess */
+	return !res;
+}
+
+static void
+set_status (GSWatcher *watcher,
+            guint      status)
+{
+	gboolean res;
+	gboolean is_idle;
+
+	if (! watcher->priv->active)
+	{
+		gs_debug ("GSWatcher: not active, ignoring status changes");
+		return;
+	}
+
+	is_idle = (status == 3);
+
+	if (!is_idle && !watcher->priv->idle_notice)
+	{
+		/* no change in idleness */
+		return;
+	}
+
+	if (is_idle)
+	{
+		res = _gs_watcher_set_session_idle_notice (watcher, is_idle);
+		/* queue an activation */
+		if (watcher->priv->idle_id > 0)
+		{
+			g_source_remove (watcher->priv->idle_id);
+		}
+		watcher->priv->idle_id = g_timeout_add (watcher->priv->delta_notice_timeout,
+		                                        (GSourceFunc)on_idle_timeout,
+		                                        watcher);
+	}
+	else
+	{
+		/* cancel notice too */
+		if (watcher->priv->idle_id > 0)
+		{
+			g_source_remove (watcher->priv->idle_id);
+		}
+		res = _gs_watcher_set_session_idle (watcher, FALSE);
+		res = _gs_watcher_set_session_idle_notice (watcher, FALSE);
+	}
+}
+
+static void
+on_presence_status_changed (DBusGProxy    *presence_proxy,
+                            guint          status,
+                            GSWatcher     *watcher)
+{
+	set_status (watcher, status);
+}
+
+static void
+on_presence_status_text_changed (DBusGProxy    *presence_proxy,
+                                 const char    *status_text,
+                                 GSWatcher     *watcher)
+{
+	set_status_text (watcher, status_text);
+}
+
+static gboolean
+connect_presence_watcher (GSWatcher *watcher)
+{
+	DBusGConnection   *bus;
+	GError            *error;
+	gboolean           ret;
+
+	ret = FALSE;
+
+	error = NULL;
+	bus = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
+	if (bus == NULL)
+	{
+		g_warning ("Unable to get session bus: %s", error->message);
+		g_error_free (error);
+		goto done;
+	}
+
+	error = NULL;
+	watcher->priv->presence_proxy = dbus_g_proxy_new_for_name_owner (bus,
+	                                "org.mate.SessionManager",
+	                                "/org/mate/SessionManager/Presence",
+	                                "org.mate.SessionManager.Presence",
+	                                &error);
+	if (watcher->priv->presence_proxy != NULL)
+	{
+		DBusGProxy *proxy;
+
+		dbus_g_proxy_add_signal (watcher->priv->presence_proxy,
+		                         "StatusChanged",
+		                         G_TYPE_UINT,
+		                         G_TYPE_INVALID);
+		dbus_g_proxy_connect_signal (watcher->priv->presence_proxy,
+		                             "StatusChanged",
+		                             G_CALLBACK (on_presence_status_changed),
+		                             watcher,
+		                             NULL);
+		dbus_g_proxy_add_signal (watcher->priv->presence_proxy,
+		                         "StatusTextChanged",
+		                         G_TYPE_STRING,
+		                         G_TYPE_INVALID);
+		dbus_g_proxy_connect_signal (watcher->priv->presence_proxy,
+		                             "StatusTextChanged",
+		                             G_CALLBACK (on_presence_status_text_changed),
+		                             watcher,
+		                             NULL);
+
+		proxy = dbus_g_proxy_new_from_proxy (watcher->priv->presence_proxy,
+		                                     "org.freedesktop.DBus.Properties",
+		                                     "/org/mate/SessionManager/Presence");
+		if (proxy != NULL)
+		{
+			guint       status;
+			const char *status_text;
+			GValue      value = { 0, };
+
+			status = 0;
+			status_text = NULL;
+
+			error = NULL;
+			dbus_g_proxy_call (proxy,
+			                   "Get",
+			                   &error,
+			                   G_TYPE_STRING, "org.mate.SessionManager.Presence",
+			                   G_TYPE_STRING, "status",
+			                   G_TYPE_INVALID,
+			                   G_TYPE_VALUE, &value,
+			                   G_TYPE_INVALID);
+
+			if (error != NULL)
+			{
+				g_warning ("Couldn't get presence status: %s", error->message);
+				g_error_free (error);
+				goto done;
+			}
+			else
+			{
+				status = g_value_get_uint (&value);
+			}
+
+			g_value_unset (&value);
+
+			error = NULL;
+			dbus_g_proxy_call (proxy,
+			                   "Get",
+			                   &error,
+			                   G_TYPE_STRING, "org.mate.SessionManager.Presence",
+			                   G_TYPE_STRING, "status-text",
+			                   G_TYPE_INVALID,
+			                   G_TYPE_VALUE, &value,
+			                   G_TYPE_INVALID);
+
+			if (error != NULL)
+			{
+				g_warning ("Couldn't get presence status text: %s", error->message);
+				g_error_free (error);
+			}
+			else
+			{
+				status_text = g_value_get_string (&value);
+			}
+
+			set_status (watcher, status);
+			set_status_text (watcher, status_text);
+		}
+	}
+	else
+	{
+		g_warning ("Failed to get session presence proxy: %s", error->message);
+		g_error_free (error);
+		goto done;
+	}
+
+	ret = TRUE;
+
+done:
+	return ret;
+}
+
+static void
+gs_watcher_init (GSWatcher *watcher)
+{
+	watcher->priv = GS_WATCHER_GET_PRIVATE (watcher);
+
+	watcher->priv->enabled = TRUE;
+	watcher->priv->active = FALSE;
+
+	connect_presence_watcher (watcher);
+
+	/* time before idle signal to send notice signal */
+	watcher->priv->delta_notice_timeout = 10000;
+
+	add_watchdog_timer (watcher, 600000);
+}
+
+static void
+gs_watcher_finalize (GObject *object)
+{
+	GSWatcher *watcher;
+
+	g_return_if_fail (object != NULL);
+	g_return_if_fail (GS_IS_WATCHER (object));
+
+	watcher = GS_WATCHER (object);
+
+	g_return_if_fail (watcher->priv != NULL);
+
+	remove_watchdog_timer (watcher);
+
+	if (watcher->priv->idle_id > 0)
+	{
+		g_source_remove (watcher->priv->idle_id);
+	}
+
+	watcher->priv->active = FALSE;
+
+	if (watcher->priv->presence_proxy != NULL)
+	{
+		g_object_unref (watcher->priv->presence_proxy);
+	}
+
+	g_free (watcher->priv->status_message);
+
+	G_OBJECT_CLASS (gs_watcher_parent_class)->finalize (object);
+}
+
+/* Figuring out what the appropriate XSetScreenSaver() parameters are
+   (one wouldn't expect this to be rocket science.)
+*/
+static void
+disable_builtin_screensaver (GSWatcher *watcher,
+                             gboolean   unblank_screen)
+{
+	int current_server_timeout, current_server_interval;
+	int current_prefer_blank,   current_allow_exp;
+	int desired_server_timeout, desired_server_interval;
+	int desired_prefer_blank,   desired_allow_exp;
+
+	XGetScreenSaver (GDK_DISPLAY (),
+	                 &current_server_timeout,
+	                 &current_server_interval,
+	                 &current_prefer_blank,
+	                 &current_allow_exp);
+
+	desired_server_timeout  = current_server_timeout;
+	desired_server_interval = current_server_interval;
+	desired_prefer_blank    = current_prefer_blank;
+	desired_allow_exp       = current_allow_exp;
+
+	desired_server_interval = 0;
+
+	/* I suspect (but am not sure) that DontAllowExposures might have
+	   something to do with powering off the monitor as well, at least
+	   on some systems that don't support XDPMS?  Who know... */
+	desired_allow_exp = AllowExposures;
+
+	/* When we're not using an extension, set the server-side timeout to 0,
+	   so that the server never gets involved with screen blanking, and we
+	   do it all ourselves.  (However, when we *are* using an extension,
+	   we tell the server when to notify us, and rather than blanking the
+	   screen, the server will send us an X event telling us to blank.)
+	*/
+	desired_server_timeout = 0;
+
+	if (desired_server_timeout     != current_server_timeout
+	        || desired_server_interval != current_server_interval
+	        || desired_prefer_blank    != current_prefer_blank
+	        || desired_allow_exp       != current_allow_exp)
+	{
+
+		gs_debug ("disabling server builtin screensaver:"
+		          " (xset s %d %d; xset s %s; xset s %s)",
+		          desired_server_timeout,
+		          desired_server_interval,
+		          (desired_prefer_blank ? "blank" : "noblank"),
+		          (desired_allow_exp ? "expose" : "noexpose"));
+
+		XSetScreenSaver (GDK_DISPLAY (),
+		                 desired_server_timeout,
+		                 desired_server_interval,
+		                 desired_prefer_blank,
+		                 desired_allow_exp);
+
+		XSync (GDK_DISPLAY (), FALSE);
+	}
+
+	if (unblank_screen)
+	{
+		/* Turn off the server builtin saver if it is now running. */
+		XForceScreenSaver (GDK_DISPLAY (), ScreenSaverReset);
+	}
+}
+
+
+/* This timer goes off every few minutes, whether the user is idle or not,
+   to try and clean up anything that has gone wrong.
+
+   It calls disable_builtin_screensaver() so that if xset has been used,
+   or some other program (like xlock) has messed with the XSetScreenSaver()
+   settings, they will be set back to sensible values (if a server extension
+   is in use, messing with xlock can cause the screensaver to never get a wakeup
+   event, and could cause monitor power-saving to occur, and all manner of
+   heinousness.)
+
+ */
+
+static gboolean
+watchdog_timer (GSWatcher *watcher)
+{
+
+	disable_builtin_screensaver (watcher, FALSE);
+
+	return TRUE;
+}
+
+GSWatcher *
+gs_watcher_new (void)
+{
+	GSWatcher *watcher;
+
+	watcher = g_object_new (GS_TYPE_WATCHER,
+	                        NULL);
+
+	return GS_WATCHER (watcher);
+}