Add our own activatable interface to EomWindow

Improves typesafety by explicitly passing the EomWindow
and allows us to extend the interface if necessary.

https://bugzilla.gnome.org/show_bug.cgi?id=626091

origin commit:
https://gitlab.gnome.org/GNOME/eog/commit/397a6a5

4 files changed, 162 insertions, 2 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index d9ef069..0bfb4d2 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -40,6 +40,7 @@ INST_H_FILES =				\
 	eom-application.h		\
 	eom-debug.h			\
 	eom-window.h			\
+	eom-window-activatable.h	\
 	eom-sidebar.h			\
 	eom-dialog.h			\
 	eom-properties-dialog.h		\
@@ -66,6 +67,7 @@ libeom_c_files =			\
 	eom-util.c			\
 	eom-pixbuf-util.c		\
 	eom-window.c			\
+	eom-window-activatable.c	\
 	eom-sidebar.c			\
 	eom-dialog.c			\
 	eom-preferences-dialog.c	\
diff --git a/src/eom-window-activatable.c b/src/eom-window-activatable.c
new file mode 100644
index 0000000..9acc0ef
--- /dev/null
+++ b/src/eom-window-activatable.c
@@ -0,0 +1,87 @@
+/*
+ * eom-window-activatable.c
+ * This file is part of eom
+ *
+ * Author: Felix Riemann <[email protected]>
+ *
+ * Copyright (C) 2011 Felix Riemann
+ * 
+ * Base on code by:
+ * 	- Steve Frécinaux <[email protected]>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "eom-window-activatable.h"
+
+#include <glib-object.h>
+#include "eom-window.h"
+
+G_DEFINE_INTERFACE(EomWindowActivatable, eom_window_activatable, G_TYPE_OBJECT)
+
+void
+eom_window_activatable_default_init (EomWindowActivatableInterface *iface)
+{
+	static gboolean initialized = FALSE;
+
+	if (!initialized) {
+		/**
+		 * EomWindowActivatable:window:
+		 *
+		 * This is the #EomWindow this #EomWindowActivatable instance
+		 * should be attached to.
+		 */
+		g_object_interface_install_property (iface,
+				g_param_spec_object ("window", "Window",
+						     "The EomWindow this "
+						     "instance it attached to",
+						     EOM_TYPE_WINDOW,
+						     G_PARAM_READWRITE |
+						     G_PARAM_CONSTRUCT_ONLY |
+						     G_PARAM_STATIC_STRINGS));
+		initialized = TRUE;
+	}
+}
+
+void
+eom_window_activatable_activate (EomWindowActivatable *activatable)
+{
+	EomWindowActivatableInterface *iface;
+
+	g_return_if_fail (EOM_IS_WINDOW_ACTIVATABLE (activatable));
+
+	iface = EOM_WINDOW_ACTIVATABLE_GET_IFACE (activatable);
+
+	if (G_LIKELY (iface->activate != NULL))
+		iface->activate (activatable);
+}
+
+void
+eom_window_activatable_deactivate (EomWindowActivatable *activatable)
+{
+	EomWindowActivatableInterface *iface;
+
+	g_return_if_fail (EOM_IS_WINDOW_ACTIVATABLE (activatable));
+
+	iface = EOM_WINDOW_ACTIVATABLE_GET_IFACE (activatable);
+
+	if (G_LIKELY (iface->deactivate != NULL))
+		iface->deactivate (activatable);
+}
+
diff --git a/src/eom-window-activatable.h b/src/eom-window-activatable.h
new file mode 100644
index 0000000..0302aa2
--- /dev/null
+++ b/src/eom-window-activatable.h
@@ -0,0 +1,69 @@
+/*
+ * eom-window-activatable.h
+ * This file is part of eom
+ *
+ * Author: Felix Riemann <[email protected]>
+ *
+ * Copyright (C) 2011 Felix Riemann
+ * 
+ * Base on code by:
+ * 	- Steve Frécinaux <[email protected]>
+ *
+ * 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.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+ */
+
+#ifndef __EOM_WINDOW_ACTIVATABLE_H__
+#define __EOM_WINDOW_ACTIVATABLE_H__
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define EOM_TYPE_WINDOW_ACTIVATABLE	(eom_window_activatable_get_type ())
+#define EOM_WINDOW_ACTIVATABLE(obj) 	(G_TYPE_CHECK_INSTANCE_CAST ((obj), \
+					 EOM_TYPE_WINDOW_ACTIVATABLE, \
+					 EomWindowActivatable))
+#define EOM_WINDOW_ACTIVATABLE_IFACE(obj) \
+					(G_TYPE_CHECK_CLASS_CAST ((obj), \
+					 EOM_TYPE_WINDOW_ACTIVATABLE, \
+					 EomWindowActivatableInterface))
+#define EOM_IS_WINDOW_ACTIVATABLE(obj)	(G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
+					 EOM_TYPE_WINDOW_ACTIVATABLE))
+#define EOM_WINDOW_ACTIVATABLE_GET_IFACE(obj) \
+					(G_TYPE_INSTANCE_GET_INTERFACE ((obj), \
+					 EOM_TYPE_WINDOW_ACTIVATABLE, \
+					 EomWindowActivatableInterface))
+
+typedef struct _EomWindowActivatable		EomWindowActivatable;
+typedef struct _EomWindowActivatableInterface	EomWindowActivatableInterface;
+
+struct _EomWindowActivatableInterface
+{
+	GTypeInterface g_iface;
+
+	/* vfuncs */
+
+	void	(*activate)	(EomWindowActivatable *activatable);
+	void	(*deactivate)	(EomWindowActivatable *activatable);
+};
+
+GType	eom_window_activatable_get_type	(void) G_GNUC_CONST;
+
+void	eom_window_activatable_activate	    (EomWindowActivatable *activatable);
+void	eom_window_activatable_deactivate   (EomWindowActivatable *activatable);
+
+G_END_DECLS
+#endif /* __EOM_WINDOW_ACTIVATABLE_H__ */
+
diff --git a/src/eom-window.c b/src/eom-window.c
index bb8c6d9..d17c9d3 100644
--- a/src/eom-window.c
+++ b/src/eom-window.c
@@ -52,6 +52,7 @@
 #include "eom-save-as-dialog-helper.h"
 #include "eom-close-confirmation-dialog.h"
 #include "eom-clipboard-handler.h"
+#include "eom-window-activatable.h"
 #include "eom-metadata-sidebar.h"
 
 #include "eom-enum-types.h"
@@ -5127,8 +5128,9 @@ eom_window_constructor (GType type,
 	eom_window_construct_ui (EOM_WINDOW (object));
 
 	priv->extensions = peas_extension_set_new (PEAS_ENGINE (EOM_APP->plugin_engine),
-						   PEAS_TYPE_ACTIVATABLE,
-						   "object", object, NULL);
+	                                           EOM_TYPE_WINDOW_ACTIVATABLE,
+	                                           "window",
+	                                           EOM_WINDOW (object), NULL);
 
 	peas_extension_set_call (priv->extensions, "activate");