Use GtkApplication to inhibit the screensaver during slideshows

Realized in a similar fashion as in Evince and Totem.

https://bugzilla.gnome.org/show_bug.cgi?id=684581

origin commit:
https://gitlab.gnome.org/GNOME/eog/commit/e8b50ab

Author: fxri

src/Makefile.am

@@ -4,8 +4,6 @@ endif
 
 toolbar_LIB = $(top_builddir)/cut-n-paste/toolbar-editor/libtoolbareditor.la
 
-screensaver_LIB = $(top_builddir)/cut-n-paste/totem-screensaver/libtotemscrsaver.la
-
 noinst_LTLIBRARIES = libeom.la
 
 bin_PROGRAMS = eom
@@ -128,7 +126,6 @@ endif HAVE_EXEMPI
 libeom_la_CPPFLAGS =						\
 	-I$(top_srcdir)/jpegutils				\
 	-I$(top_srcdir)/cut-n-paste/toolbar-editor		\
-	-I$(top_srcdir)/cut-n-paste/totem-screensaver		\
 	-DG_LOG_DOMAIN=\"EOM\"					\
 	-DEOM_DATA_DIR=\""$(pkgdatadir)"\"			\
 	-DEOM_LOCALE_DIR=\""$(datadir)/locale"\"		\
@@ -154,7 +151,6 @@ eom_SOURCES = main.c
 
 eom_CFLAGS = 							\
 	-I$(top_srcdir)/cut-n-paste/toolbar-editor		\
-	-I$(top_srcdir)/cut-n-paste/totem-screensaver		\
 	$(EOM_CFLAGS)						\
 	-DEOM_DATA_DIR=\""$(pkgdatadir)"\"			\
 	-DEOM_LOCALE_DIR=\""$(datadir)/locale"\"		\
@@ -165,7 +161,6 @@ eom_LDADD = 				\
 	$(EOM_LIBS)			\
 	$(LIBJPEG)			\
 	$(toolbar_LIB)			\
-	$(screensaver_LIB)		\
 	$(jpeg_LIB)			\
 	$(INTROSPECTION_LIBS)
 

src/eom-application.c

@@ -32,8 +32,6 @@
 #include "eom-application.h"
 #include "eom-util.h"
 
-#include "totem-scrsaver.h"
-
 #include <string.h>
 #include <glib.h>
 #include <glib/gi18n.h>
@@ -485,34 +483,6 @@ eom_application_reset_toolbars_model (EomApplication *app)
 				      EGG_TB_MODEL_NOT_REMOVABLE);
 }
 
-/**
- * eom_application_screensaver_enable:
- * @application: an #EomApplication.
- *
- * Enables the screensaver. Usually necessary after a call to
- * eom_application_screensaver_disable().
- **/
-void
-eom_application_screensaver_enable (EomApplication *application)
-{
-        if (application->scr_saver)
-                totem_scrsaver_enable (application->scr_saver);
-}
-
-/**
- * eom_application_screensaver_disable:
- * @application: an #EomApplication.
- *
- * Disables the screensaver. Useful when the application is in fullscreen or
- * similar mode.
- **/
-void
-eom_application_screensaver_disable (EomApplication *application)
-{
-        if (application->scr_saver)
-                totem_scrsaver_disable (application->scr_saver);
-}
-
 static void
 eom_application_load_accelerators (void)
 {

src/eom-application.h

@@ -29,8 +29,6 @@
 #include "eom-plugin-engine.h"
 #include "egg-toolbars-model.h"
 
-#include "totem-scrsaver.h"
-
 #include <glib.h>
 #include <glib-object.h>
 
@@ -57,7 +55,6 @@ struct _EomApplication {
 
 	EomPluginEngine  *plugin_engine;
 
-	TotemScrsaver    *scr_saver;
 	EomStartupFlags   flags;
 };
 
@@ -98,10 +95,6 @@ void              eom_application_save_toolbars_model (EomApplication *applicati
 
 void		  eom_application_reset_toolbars_model (EomApplication *app);
 
-void              eom_application_screensaver_enable  (EomApplication *application);
-
-void              eom_application_screensaver_disable (EomApplication *application);
-
 G_END_DECLS
 
 #endif /* __EOM_APPLICATION_H__ */

src/eom-window.c

@@ -161,6 +161,8 @@ struct _EomWindowPrivate {
 	gint                 slideshow_switch_timeout;
 	GSource             *slideshow_switch_source;
 
+	guint                fullscreen_idle_inhibit_cookie;
+
 	guint                recent_menu_id;
 
 	EomJob              *load_job;
@@ -1972,6 +1974,37 @@ update_ui_visibility (EomWindow *window)
 	}
 }
 
+static void
+eom_window_inhibit_screensaver (EomWindow *window)
+{
+	EomWindowPrivate *priv = window->priv;
+
+	g_return_if_fail (priv->fullscreen_idle_inhibit_cookie == 0);
+
+	eom_debug (DEBUG_WINDOW);
+
+	window->priv->fullscreen_idle_inhibit_cookie =
+		gtk_application_inhibit (GTK_APPLICATION (EOM_APP),
+		                         GTK_WINDOW (window),
+		                         GTK_APPLICATION_INHIBIT_IDLE,
+		                         _("Viewing a slideshow"));
+}
+
+static void
+eom_window_uninhibit_screensaver (EomWindow *window)
+{
+	EomWindowPrivate *priv = window->priv;
+
+	if (G_UNLIKELY (priv->fullscreen_idle_inhibit_cookie == 0))
+		return;
+
+	eom_debug (DEBUG_WINDOW);
+
+	gtk_application_uninhibit (GTK_APPLICATION (EOM_APP),
+	                           priv->fullscreen_idle_inhibit_cookie);
+	priv->fullscreen_idle_inhibit_cookie = 0;
+}
+
 static void
 eom_window_run_fullscreen (EomWindow *window, gboolean slideshow)
 {
@@ -2057,7 +2090,7 @@ eom_window_run_fullscreen (EomWindow *window, gboolean slideshow)
 	gtk_window_fullscreen (GTK_WINDOW (window));
 	eom_window_update_fullscreen_popup (window);
 
-	eom_application_screensaver_disable (EOM_APP);
+	eom_window_inhibit_screensaver (window);
 
 	/* Update both actions as we could've already been in one those modes */
 	eom_window_update_slideshow_action (window);
@@ -2122,7 +2155,7 @@ eom_window_stop_fullscreen (EomWindow *window, gboolean slideshow)
 
 	eom_scroll_view_show_cursor (EOM_SCROLL_VIEW (priv->view));
 
-	eom_application_screensaver_enable (EOM_APP);
+	eom_window_uninhibit_screensaver (window);
 }
 
 static void
@@ -4542,6 +4575,7 @@ eom_window_init (EomWindow *window)
 	window->priv->slideshow_loop = FALSE;
 	window->priv->slideshow_switch_timeout = 0;
 	window->priv->slideshow_switch_source = NULL;
+	window->priv->fullscreen_idle_inhibit_cookie = 0;
 
 	gtk_window_set_geometry_hints (GTK_WINDOW (window),
 				       GTK_WIDGET (window),
@@ -4666,6 +4700,7 @@ eom_window_dispose (GObject *object)
 	}
 
 	slideshow_clear_timeout (window);
+	eom_window_uninhibit_screensaver (window);
 
 	g_signal_handlers_disconnect_by_func (gtk_recent_manager_get_default (),
 					      G_CALLBACK (eom_window_recent_manager_changed_cb),