cut-n-paste/totem-screensaver/.cvsignore

2006-11-22  Wouter Bolsterlee  <wbolster@cvs.gnome.org>

	* configure.ac:
	* cut-n-paste/Makefile.am:
	* cut-n-paste/totem-screensaver/.cvsignore
	* cut-n-paste/totem-screensaver/Makefile.am:
	* cut-n-paste/totem-screensaver/README:
	* cut-n-paste/totem-screensaver/totem-scrsaver.c:
	* cut-n-paste/totem-screensaver/totem-scrsaver.h:
	* shell/Makefile.am:
	* shell/ev-window.c: (ev_window_run_presentation),
	(ev_window_stop_presentation), (ev_window_cmd_help_about),
	(ev_window_init):

	Implemented screensaver enabling/disabling for
	presentation mode (not fullscreen mode). Code stolen
	from Totem (with some minor tweaks). Fixes bug #338889.

6 files changed, 482 insertions, 1 deletions

diff --git a/cut-n-paste/Makefile.am b/cut-n-paste/Makefile.am
index 33218c0..d70ab46 100644
--- a/cut-n-paste/Makefile.am
+++ b/cut-n-paste/Makefile.am
@@ -6,4 +6,4 @@ else
 SUBDIRS += recent-files 
 endif
 
-SUBDIRS += zoom-control toolbar-editor
+SUBDIRS += zoom-control toolbar-editor totem-screensaver
diff --git a/cut-n-paste/totem-screensaver/.cvsignore b/cut-n-paste/totem-screensaver/.cvsignore
new file mode 100644
index 0000000..282522d
--- /dev/null
+++ b/cut-n-paste/totem-screensaver/.cvsignore
@@ -0,0 +1,2 @@
+Makefile
+Makefile.in
diff --git a/cut-n-paste/totem-screensaver/Makefile.am b/cut-n-paste/totem-screensaver/Makefile.am
new file mode 100644
index 0000000..9108b91
--- /dev/null
+++ b/cut-n-paste/totem-screensaver/Makefile.am
@@ -0,0 +1,11 @@
+noinst_LTLIBRARIES = libtotemscrsaver.la
+libtotemscrsaver_la_SOURCES = \
+	totem-scrsaver.h \
+	totem-scrsaver.c
+
+libtotemscrsaver_la_CFLAGS = \
+	-I$(top_srcdir)/lib	\
+	$(LIB_CFLAGS)		\
+	$(DBUS_CFLAGS)		\
+	$(WARNING_CFLAGS)	\
+	$(DISABLE_DEPRECATED)
diff --git a/cut-n-paste/totem-screensaver/README b/cut-n-paste/totem-screensaver/README
new file mode 100644
index 0000000..a5be11b
--- /dev/null
+++ b/cut-n-paste/totem-screensaver/README
@@ -0,0 +1,3 @@
+The sources for the screensaver enabling/disabling code are copied from Totem.
+A simple replacement (s/WITH_DBUS/ENABLE_DBUS/g) was needed. The hardcoded
+"reason for inhibiting" string was also modified.
diff --git a/cut-n-paste/totem-screensaver/totem-scrsaver.c b/cut-n-paste/totem-screensaver/totem-scrsaver.c
new file mode 100644
index 0000000..5d5a1f2
--- /dev/null
+++ b/cut-n-paste/totem-screensaver/totem-scrsaver.c
@@ -0,0 +1,416 @@
+/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8 -*-
+
+   Copyright (C) 2004-2006 Bastien Nocera <hadess@hadess.net>
+
+   The Gnome Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The Gnome Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Gnome Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+
+   Author: Bastien Nocera <hadess@hadess.net>
+ */
+
+
+#include "config.h"
+
+#include <glib/gi18n.h>
+#include <gdk/gdkx.h>
+
+#ifdef HAVE_XTEST
+#include <X11/extensions/XTest.h>
+#endif /* HAVE_XTEST */
+#include <X11/keysym.h>
+
+#ifdef ENABLE_DBUS
+#include <dbus/dbus.h>
+#include <dbus/dbus-glib.h>
+
+#define GS_SERVICE   "org.gnome.ScreenSaver"
+#define GS_PATH      "/org/gnome/ScreenSaver"
+#define GS_INTERFACE "org.gnome.ScreenSaver"
+#endif /* ENABLE_DBUS */
+
+#include "totem-scrsaver.h"
+
+#define XSCREENSAVER_MIN_TIMEOUT 60
+
+static GObjectClass *parent_class = NULL;
+static void totem_scrsaver_class_init (TotemScrsaverClass *class);
+static void totem_scrsaver_init       (TotemScrsaver      *parser);
+static void totem_scrsaver_finalize   (GObject *object);
+
+
+struct TotemScrsaverPrivate {
+	/* Whether the screensaver is disabled */
+	gboolean disabled;
+
+#ifdef ENABLE_DBUS
+	DBusGConnection *connection;
+	DBusGProxy *gs_proxy;
+	guint32 cookie;
+#endif /* ENABLE_DBUS */
+
+	/* To save the screensaver info */
+	int timeout;
+	int interval;
+	int prefer_blanking;
+	int allow_exposures;
+
+	/* For use with XTest */
+	int keycode1, keycode2;
+	int *keycode;
+	Bool have_xtest;
+};
+
+G_DEFINE_TYPE(TotemScrsaver, totem_scrsaver, G_TYPE_OBJECT)
+
+static gboolean
+screensaver_is_running_dbus (TotemScrsaver *scr)
+{
+#ifdef ENABLE_DBUS
+	if (! scr->priv->connection)
+		return FALSE;
+
+	if (! scr->priv->gs_proxy)
+		return FALSE;
+
+	return TRUE;
+#else
+	return FALSE;
+#endif /* ENABLE_DBUS */
+}
+
+static void
+screensaver_inhibit_dbus (TotemScrsaver *scr,
+			  gboolean	 inhibit)
+{
+#ifdef ENABLE_DBUS
+	GError *error;
+	gboolean res;
+
+	g_return_if_fail (scr != NULL);
+	g_return_if_fail (scr->priv->connection != NULL);
+	g_return_if_fail (scr->priv->gs_proxy != NULL);
+
+	error = NULL;
+	if (inhibit) {
+		char   *application;
+		char   *reason;
+		guint32 cookie;
+
+		application = g_strdup ("Evince");
+		reason = g_strdup (_("Running in presentation mode"));
+
+		res = dbus_g_proxy_call (scr->priv->gs_proxy,
+					 "Inhibit",
+					 &error,
+					 G_TYPE_STRING, application,
+					 G_TYPE_STRING, reason,
+					 G_TYPE_INVALID,
+					 G_TYPE_UINT, &cookie,
+					 G_TYPE_INVALID);
+
+		if (res) {
+			/* save the cookie */
+			scr->priv->cookie = cookie;
+		} else {
+			/* try the old API */
+			res = dbus_g_proxy_call (scr->priv->gs_proxy,
+						 "InhibitActivation",
+						 &error,
+						 G_TYPE_STRING, reason,
+						 G_TYPE_INVALID,
+						 G_TYPE_INVALID);
+		}
+
+		g_free (reason);
+		g_free (application);
+
+	} else {
+		res = dbus_g_proxy_call (scr->priv->gs_proxy,
+					 "UnInhibit",
+					 &error,
+					 G_TYPE_UINT, scr->priv->cookie,
+					 G_TYPE_INVALID,
+					 G_TYPE_INVALID);
+		if (res) {
+			/* clear the cookie */
+			scr->priv->cookie = 0;
+		} else {
+			/* try the old API */
+			res = dbus_g_proxy_call (scr->priv->gs_proxy,
+						 "AllowActivation",
+						 &error,
+						 G_TYPE_INVALID,
+						 G_TYPE_INVALID);
+		}
+	}
+
+	if (! res) {
+		if (error) {
+			g_warning ("Problem inhibiting the screensaver: %s", error->message);
+			g_error_free (error);
+		}
+	}
+#endif /* ENABLE_DBUS */
+}
+
+static void
+screensaver_enable_dbus (TotemScrsaver *scr)
+{
+	screensaver_inhibit_dbus (scr, FALSE);
+}
+
+static void
+screensaver_disable_dbus (TotemScrsaver *scr)
+{
+	screensaver_inhibit_dbus (scr, TRUE);
+}
+
+#ifdef ENABLE_DBUS
+static void
+gs_proxy_destroy_cb (GObject *proxy,
+		     TotemScrsaver *scr)
+{
+	g_warning ("Detected that GNOME screensaver has left the bus");
+
+	/* just invalidate for now */
+	scr->priv->gs_proxy = NULL;
+}
+#endif
+
+static void
+screensaver_init_dbus (TotemScrsaver *scr)
+{
+#ifdef ENABLE_DBUS
+	GError *error = NULL;
+
+	scr->priv->connection = dbus_g_bus_get (DBUS_BUS_SESSION, &error);
+
+	if (! scr->priv->connection) {
+		if (error) {
+			g_warning ("Failed to connect to the session bus: %s", error->message);
+			g_error_free (error);
+		}
+		return;
+	}
+
+	scr->priv->gs_proxy = dbus_g_proxy_new_for_name_owner (scr->priv->connection,
+							       GS_SERVICE,
+							       GS_PATH,
+							       GS_INTERFACE,
+							       NULL);
+	if (scr->priv->gs_proxy != NULL) {
+		g_signal_connect_object (scr->priv->gs_proxy,
+					 "destroy",
+					 G_CALLBACK (gs_proxy_destroy_cb),
+					 scr,
+					 0);
+
+	}
+
+#endif /* ENABLE_DBUS */
+}
+
+static void
+screensaver_finalize_dbus (TotemScrsaver *scr)
+{
+#ifdef ENABLE_DBUS
+	if (scr->priv->gs_proxy) {
+		g_object_unref (scr->priv->gs_proxy);
+	}
+#endif /* ENABLE_DBUS */
+}
+
+static void
+screensaver_enable_x11 (TotemScrsaver *scr)
+{
+
+#ifdef HAVE_XTEST
+	if (scr->priv->have_xtest == True)
+	{
+		g_source_remove_by_user_data (scr);
+		return;
+	}
+#endif /* HAVE_XTEST */
+
+	XLockDisplay (GDK_DISPLAY());
+	XSetScreenSaver (GDK_DISPLAY(),
+			scr->priv->timeout,
+			scr->priv->interval,
+			scr->priv->prefer_blanking,
+			scr->priv->allow_exposures);
+	XUnlockDisplay (GDK_DISPLAY());
+}
+
+#ifdef HAVE_XTEST
+static gboolean
+fake_event (TotemScrsaver *scr)
+{
+	if (scr->priv->disabled)
+	{
+		XLockDisplay (GDK_DISPLAY());
+		XTestFakeKeyEvent (GDK_DISPLAY(), *scr->priv->keycode,
+				True, CurrentTime);
+		XTestFakeKeyEvent (GDK_DISPLAY(), *scr->priv->keycode,
+				False, CurrentTime);
+		XUnlockDisplay (GDK_DISPLAY());
+		/* Swap the keycode */
+		if (scr->priv->keycode == &scr->priv->keycode1)
+			scr->priv->keycode = &scr->priv->keycode2;
+		else
+			scr->priv->keycode = &scr->priv->keycode1;
+	}
+
+	return TRUE;
+}
+#endif /* HAVE_XTEST */
+
+static void
+screensaver_disable_x11 (TotemScrsaver *scr)
+{
+
+#ifdef HAVE_XTEST
+	if (scr->priv->have_xtest == True)
+	{
+		XLockDisplay (GDK_DISPLAY());
+		XGetScreenSaver(GDK_DISPLAY(), &scr->priv->timeout,
+				&scr->priv->interval,
+				&scr->priv->prefer_blanking,
+				&scr->priv->allow_exposures);
+		XUnlockDisplay (GDK_DISPLAY());
+
+		if (scr->priv->timeout != 0)
+		{
+			g_timeout_add (scr->priv->timeout / 2 * 1000,
+					(GSourceFunc) fake_event, scr);
+		} else {
+			g_timeout_add (XSCREENSAVER_MIN_TIMEOUT / 2 * 1000,
+					(GSourceFunc) fake_event, scr);
+		}
+
+		return;
+	}
+#endif /* HAVE_XTEST */
+
+	XLockDisplay (GDK_DISPLAY());
+	XGetScreenSaver(GDK_DISPLAY(), &scr->priv->timeout,
+			&scr->priv->interval,
+			&scr->priv->prefer_blanking,
+			&scr->priv->allow_exposures);
+	XSetScreenSaver(GDK_DISPLAY(), 0, 0,
+			DontPreferBlanking, DontAllowExposures);
+	XUnlockDisplay (GDK_DISPLAY());
+}
+
+static void
+screensaver_init_x11 (TotemScrsaver *scr)
+{
+#ifdef HAVE_XTEST
+	int a, b, c, d;
+
+	XLockDisplay (GDK_DISPLAY());
+	scr->priv->have_xtest = XTestQueryExtension (GDK_DISPLAY(), &a, &b, &c, &d);
+	if(scr->priv->have_xtest == True)
+	{
+		scr->priv->keycode1 = XKeysymToKeycode (GDK_DISPLAY(), XK_Alt_L);
+		if (scr->priv->keycode1 == 0) {
+			g_warning ("scr->priv->keycode1 not existant");
+		}
+		scr->priv->keycode2 = XKeysymToKeycode (GDK_DISPLAY(), XK_Alt_R);
+		if (scr->priv->keycode2 == 0) {
+			scr->priv->keycode2 = XKeysymToKeycode (GDK_DISPLAY(), XK_Alt_L);
+			if (scr->priv->keycode2 == 0) {
+				g_warning ("scr->priv->keycode2 not existant");
+			}
+		}
+		scr->priv->keycode = &scr->priv->keycode1;
+	}
+	XUnlockDisplay (GDK_DISPLAY());
+#endif /* HAVE_XTEST */
+}
+
+static void
+screensaver_finalize_x11 (TotemScrsaver *scr)
+{
+	g_source_remove_by_user_data (scr);
+}
+
+static void
+totem_scrsaver_class_init (TotemScrsaverClass *klass)
+{
+	GObjectClass *object_class = G_OBJECT_CLASS (klass);
+
+	parent_class = g_type_class_peek_parent (klass);
+
+	object_class->finalize = totem_scrsaver_finalize;
+}
+
+TotemScrsaver *
+totem_scrsaver_new (void)
+{
+	return TOTEM_SCRSAVER (g_object_new (TOTEM_TYPE_SCRSAVER, NULL));
+}
+
+static void
+totem_scrsaver_init (TotemScrsaver *scr)
+{
+	scr->priv = g_new0 (TotemScrsaverPrivate, 1);
+
+	screensaver_init_dbus (scr);
+	screensaver_init_x11 (scr);
+}
+
+void
+totem_scrsaver_disable (TotemScrsaver *scr)
+{
+	if (scr->priv->disabled != FALSE)
+		return;
+
+	scr->priv->disabled = TRUE;
+
+	if (screensaver_is_running_dbus (scr) != FALSE)
+		screensaver_disable_dbus (scr);
+	else 
+		screensaver_disable_x11 (scr);
+}
+
+void
+totem_scrsaver_enable (TotemScrsaver *scr)
+{
+	if (scr->priv->disabled == FALSE)
+		return;
+
+	scr->priv->disabled = FALSE;
+
+	if (screensaver_is_running_dbus (scr) != FALSE)
+		screensaver_enable_dbus (scr);
+	else 
+		screensaver_enable_x11 (scr);
+}
+
+static void
+totem_scrsaver_finalize (GObject *object)
+{
+	TotemScrsaver *scr = TOTEM_SCRSAVER (object);
+
+	screensaver_finalize_dbus (scr);
+	screensaver_finalize_x11 (scr);
+
+	g_free (scr->priv);
+
+	if (G_OBJECT_CLASS (parent_class)->finalize != NULL) {
+		(* G_OBJECT_CLASS (parent_class)->finalize) (object);
+	}
+}
+
diff --git a/cut-n-paste/totem-screensaver/totem-scrsaver.h b/cut-n-paste/totem-screensaver/totem-scrsaver.h
new file mode 100644
index 0000000..f34fb15
--- /dev/null
+++ b/cut-n-paste/totem-screensaver/totem-scrsaver.h
@@ -0,0 +1,49 @@
+/* 
+   Copyright (C) 2004, Bastien Nocera <hadess@hadess.net>
+
+   The Gnome Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Library General Public License as
+   published by the Free Software Foundation; either version 2 of the
+   License, or (at your option) any later version.
+
+   The Gnome Library 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
+   Library General Public License for more details.
+
+   You should have received a copy of the GNU Library General Public
+   License along with the Gnome Library; see the file COPYING.LIB.  If not,
+   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+   Boston, MA 02111-1307, USA.
+
+   Author: Bastien Nocera <hadess@hadess.net>
+ */
+
+#include <glib.h>
+#include <glib-object.h>
+
+#define TOTEM_TYPE_SCRSAVER		(totem_scrsaver_get_type ())
+#define TOTEM_SCRSAVER(obj)            (G_TYPE_CHECK_INSTANCE_CAST ((obj), TOTEM_TYPE_SCRSAVER, TotemScrsaver))
+#define TOTEM_SCRSAVER_CLASS(klass)    (G_TYPE_CHECK_CLASS_CAST ((klass), TOTEM_TYPE_SCRSAVER, TotemScrsaverClass))
+#define TOTEM_IS_SCRSAVER(obj)         (G_TYPE_CHECK_INSTANCE_TYPE ((obj), TOTEM_TYPE_SCRSAVER))
+#define TOTEM_IS_SCRSAVER_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), TOTEM_TYPE_SCRSAVER))
+
+
+typedef struct TotemScrsaver TotemScrsaver;
+typedef struct TotemScrsaverClass TotemScrsaverClass;
+typedef struct TotemScrsaverPrivate TotemScrsaverPrivate;
+
+struct TotemScrsaver {
+	GObject parent;
+	TotemScrsaverPrivate *priv;
+};
+
+struct TotemScrsaverClass {
+	GObjectClass parent_class; 
+};
+
+GType totem_scrsaver_get_type		(void);
+TotemScrsaver *totem_scrsaver_new	(void);
+void totem_scrsaver_enable		(TotemScrsaver *scr);
+void totem_scrsaver_disable		(TotemScrsaver *scr);
+