Add new plugin hook for per-application plugins

These will be loaded on application initialization and disabled
once the application is disposed.

origin commit:
https://gitlab.gnome.org/GNOME/eog/commit/cdfe77e

5 files changed, 195 insertions, 0 deletions

diff --git a/src/Makefile.am b/src/Makefile.am
index 0bfb4d2..79fe623 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -38,6 +38,7 @@ NOINST_H_FILES =			\
 
 INST_H_FILES =				\
 	eom-application.h		\
+	eom-application-activatable.h	\
 	eom-debug.h			\
 	eom-window.h			\
 	eom-window-activatable.h	\
@@ -62,6 +63,7 @@ INST_H_FILES =				\
 
 libeom_c_files =			\
 	eom-application.c		\
+	eom-application-activatable.c	\
 	eom-session.c			\
 	eom-debug.c			\
 	eom-util.c			\
diff --git a/src/eom-application-activatable.c b/src/eom-application-activatable.c
new file mode 100644
index 0000000..5433ad5
--- /dev/null
+++ b/src/eom-application-activatable.c
@@ -0,0 +1,86 @@
+/*
+ * eom-application-activatable.c
+ * This file is part of eom
+ *
+ * Author: Felix Riemann <[email protected]>
+ *
+ * Copyright (C) 2012 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-application-activatable.h"
+
+#include <glib-object.h>
+#include "eom-application.h"
+
+G_DEFINE_INTERFACE(EomApplicationActivatable, eom_application_activatable, G_TYPE_OBJECT)
+
+void
+eom_application_activatable_default_init (EomApplicationActivatableInterface *iface)
+{
+	static gboolean initialized = FALSE;
+
+	if (!initialized) {
+		/**
+         * EomApplicationActivatable:app:
+		 *
+         * This is the #EomApplication this #EomApplicationActivatable instance
+		 * should be attached to.
+		 */
+		g_object_interface_install_property (iface,
+                g_param_spec_object ("app", "Application",
+                             "The EomApplication this instance it attached to",
+                             EOM_TYPE_APPLICATION,
+						     G_PARAM_READWRITE |
+						     G_PARAM_CONSTRUCT_ONLY |
+						     G_PARAM_STATIC_STRINGS));
+		initialized = TRUE;
+	}
+}
+
+void
+eom_application_activatable_activate (EomApplicationActivatable *activatable)
+{
+    EomApplicationActivatableInterface *iface;
+
+    g_return_if_fail (EOM_IS_APPLICATION_ACTIVATABLE (activatable));
+
+    iface = EOM_APPLICATION_ACTIVATABLE_GET_IFACE (activatable);
+
+	if (G_LIKELY (iface->activate != NULL))
+		iface->activate (activatable);
+}
+
+void
+eom_application_activatable_deactivate (EomApplicationActivatable *activatable)
+{
+    EomApplicationActivatableInterface *iface;
+
+    g_return_if_fail (EOM_IS_APPLICATION_ACTIVATABLE (activatable));
+
+    iface = EOM_APPLICATION_ACTIVATABLE_GET_IFACE (activatable);
+
+	if (G_LIKELY (iface->deactivate != NULL))
+		iface->deactivate (activatable);
+}
+
diff --git a/src/eom-application-activatable.h b/src/eom-application-activatable.h
new file mode 100644
index 0000000..5ab09dc
--- /dev/null
+++ b/src/eom-application-activatable.h
@@ -0,0 +1,70 @@
+/*
+ * eom-application-activatable.h
+ * This file is part of eom
+ *
+ * Author: Felix Riemann <[email protected]>
+ *
+ * Copyright (C) 2012 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_APPLICATION_ACTIVATABLE_H__
+#define __EOM_APPLICATION_ACTIVATABLE_H__
+
+#include <glib-object.h>
+
+G_BEGIN_DECLS
+
+#define EOM_TYPE_APPLICATION_ACTIVATABLE (eom_application_activatable_get_type ())
+#define EOM_APPLICATION_ACTIVATABLE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), \
+                                          EOM_TYPE_APPLICATION_ACTIVATABLE, \
+                                          EomApplicationActivatable))
+#define EOM_APPLICATION_ACTIVATABLE_IFACE(obj) \
+                                          (G_TYPE_CHECK_CLASS_CAST ((obj), \
+                                           EOM_TYPE_APPLICATION_ACTIVATABLE, \
+                                           EomApplicationActivatableInterface))
+#define EOM_IS_APPLICATION_ACTIVATABLE(obj) \
+                                          (G_TYPE_CHECK_INSTANCE_TYPE ((obj), \
+                                           EOM_TYPE_APPLICATION_ACTIVATABLE))
+#define EOM_APPLICATION_ACTIVATABLE_GET_IFACE(obj) \
+                                        (G_TYPE_INSTANCE_GET_INTERFACE ((obj), \
+                                         EOM_TYPE_APPLICATION_ACTIVATABLE, \
+                                         EomApplicationActivatableInterface))
+
+typedef struct _EomApplicationActivatable		EomApplicationActivatable;
+typedef struct _EomApplicationActivatableInterface	EomApplicationActivatableInterface;
+
+struct _EomApplicationActivatableInterface
+{
+	GTypeInterface g_iface;
+
+	/* vfuncs */
+
+    void	(*activate)	(EomApplicationActivatable *activatable);
+    void	(*deactivate)	(EomApplicationActivatable *activatable);
+};
+
+GType	eom_application_activatable_get_type     (void) G_GNUC_CONST;
+
+void	eom_application_activatable_activate     (EomApplicationActivatable *activatable);
+void	eom_application_activatable_deactivate   (EomApplicationActivatable *activatable);
+
+G_END_DECLS
+#endif /* __EOM_APPLICATION_ACTIVATABLE_H__ */
+
diff --git a/src/eom-application.c b/src/eom-application.c
index 6135ae1..1ab52d1 100644
--- a/src/eom-application.c
+++ b/src/eom-application.c
@@ -30,6 +30,7 @@
 #include "eom-session.h"
 #include "eom-window.h"
 #include "eom-application.h"
+#include "eom-application-activatable.h"
 #include "eom-util.h"
 
 #include <string.h>
@@ -86,6 +87,9 @@ eom_application_finalize (GObject *object)
 		g_free (application->toolbars_file);
 		application->toolbars_file = NULL;
 	}
+
+	g_clear_object (&application->extensions);
+
 	if (application->plugin_engine) {
 		g_object_unref (application->plugin_engine);
 		application->plugin_engine = NULL;
@@ -147,6 +151,24 @@ eom_application_class_init (EomApplicationClass *eom_application_class)
 }
 
 static void
+on_extension_added (PeasExtensionSet *set,
+                    PeasPluginInfo   *info,
+                    PeasExtension    *exten,
+                    EomApplication   *app)
+{
+	eom_application_activatable_activate (EOM_APPLICATION_ACTIVATABLE (exten));
+}
+
+static void
+on_extension_removed (PeasExtensionSet *set,
+                      PeasPluginInfo   *info,
+                      PeasExtension    *exten,
+                      EomApplication   *app)
+{
+	eom_application_activatable_deactivate (EOM_APPLICATION_ACTIVATABLE (exten));
+}
+
+static void
 eom_application_init (EomApplication *eom_application)
 {
 	const gchar *dot_dir = eom_util_dot_dir ();
@@ -175,6 +197,17 @@ eom_application_init (EomApplication *eom_application)
 				      EGG_TB_MODEL_NOT_REMOVABLE);
 
 	eom_application_load_accelerators ();
+
+	eom_application->extensions = peas_extension_set_new (
+	                           PEAS_ENGINE (eom_application->plugin_engine),
+	                           EOM_TYPE_APPLICATION_ACTIVATABLE,
+	                           "app",  EOM_APPLICATION (eom_application),
+	                           NULL);
+	peas_extension_set_call (eom_application->extensions, "activate");
+	g_signal_connect (eom_application->extensions, "extension-added",
+	                  G_CALLBACK (on_extension_added), eom_application);
+	g_signal_connect (eom_application->extensions, "extension-removed",
+	                  G_CALLBACK (on_extension_removed), eom_application);
 }
 
 /**
diff --git a/src/eom-application.h b/src/eom-application.h
index 16c4419..01e8887 100644
--- a/src/eom-application.h
+++ b/src/eom-application.h
@@ -32,6 +32,8 @@
 #include <glib.h>
 #include <glib-object.h>
 
+#include <libpeas/peas-extension-set.h>
+
 G_BEGIN_DECLS
 
 typedef struct _EomApplication EomApplication;
@@ -56,6 +58,8 @@ struct _EomApplication {
 	EomPluginEngine  *plugin_engine;
 
 	EomStartupFlags   flags;
+
+	PeasExtensionSet *extensions;
 };
 
 struct _EomApplicationClass {