A libdocument/ev-init.[ch]: Add single init/shutdown method. Bug #569117.

	* evince-document.h:
	* libdocument/Makefile.am:
	A libdocument/ev-init.[ch]: Add single init/shutdown method. Bug
	#569117.

	* libdocument/ev-backends-manager.c: (_ev_backends_manager_init):
	* libdocument/ev-backends-manager.h:
	* libdocument/ev-debug.c: (_ev_debug_init), (_ev_debug_shutdown):
	* libdocument/ev-debug.h:
	* libdocument/ev-file-helpers.c: (_ev_file_helpers_init),
	(_ev_file_helpers_shutdown):
	* libdocument/ev-file-helpers.h: Make these init/shutdown methods
	private.

	* properties/ev-properties-main.c: (nautilus_module_initialize),
	(nautilus_module_shutdown):
	* shell/main.c: (main):
	* thumbnailer/evince-thumbnailer.c: (main): Use the new single
	init/shutdown method.

svn path=/trunk/; revision=3391

9 files changed, 149 insertions, 13 deletions

diff --git a/libdocument/Makefile.am b/libdocument/Makefile.am
index 94b049f..6eab585 100644
--- a/libdocument/Makefile.am
+++ b/libdocument/Makefile.am
@@ -26,6 +26,7 @@ INST_H_FILES = 					\
 	ev-file-helpers.h			\
 	ev-form-field.h				\
 	ev-image.h				\
+	ev-init.h				\
 	ev-layer.h				\
 	ev-link-action.h			\
 	ev-link-dest.h				\
@@ -48,6 +49,7 @@ libevdocument_la_SOURCES=			\
 	ev-link-action.c			\
 	ev-link-dest.c				\
 	ev-image.c				\
+	ev-init.c				\
 	ev-document.c				\
 	ev-document-factory.c			\
 	ev-document-thumbnails.c		\
diff --git a/libdocument/ev-backends-manager.c b/libdocument/ev-backends-manager.c
index 505d5c4..e92ecb5 100644
--- a/libdocument/ev-backends-manager.c
+++ b/libdocument/ev-backends-manager.c
@@ -146,17 +146,29 @@ ev_backends_manager_load (void)
 	return TRUE;
 }
 
+/*
+ * _ev_backends_manager_init:
+ *
+ * Initializes the evince backends manager.
+ *
+ * Returns: %TRUE if there were any backends found; %FALSE otherwise
+ */
 gboolean
-ev_backends_manager_init (void)
+_ev_backends_manager_init (void)
 {
 	if (ev_backends_list)
-		return FALSE;
+		return TRUE;
 
 	return ev_backends_manager_load ();
 }
 
+/*
+ * _ev_backends_manager_shutdown:
+ *
+ * Shuts the evince backends manager down.
+ */
 void
-ev_backends_manager_shutdown (void)
+_ev_backends_manager_shutdown (void)
 {
 	g_list_foreach (ev_backends_list, (GFunc)ev_backend_info_free, NULL);
 	g_list_free (ev_backends_list);
diff --git a/libdocument/ev-backends-manager.h b/libdocument/ev-backends-manager.h
index 4fb1656..4bb54f2 100644
--- a/libdocument/ev-backends-manager.h
+++ b/libdocument/ev-backends-manager.h
@@ -35,8 +35,8 @@ typedef struct _EvTypeInfo {
 	const gchar **mime_types;
 } EvTypeInfo;
 
-gboolean   ev_backends_manager_init                       (void);
-void       ev_backends_manager_shutdown                   (void);
+gboolean    _ev_backends_manager_init                     (void);
+void        _ev_backends_manager_shutdown                 (void);
 
 EvDocument  *ev_backends_manager_get_document             (const gchar *mime_type);
 const gchar *ev_backends_manager_get_document_module_name (EvDocument  *document);
diff --git a/libdocument/ev-debug.c b/libdocument/ev-debug.c
index 48cbf5d..c6918e7 100644
--- a/libdocument/ev-debug.c
+++ b/libdocument/ev-debug.c
@@ -79,14 +79,14 @@ profile_init ()
 }
 
 void
-ev_debug_init ()
+_ev_debug_init ()
 {
 	debug_init ();
 	profile_init ();
 }
 
 void
-ev_debug_shutdown ()
+_ev_debug_shutdown ()
 {
 	if (timers) {
 		g_hash_table_destroy (timers);
diff --git a/libdocument/ev-debug.h b/libdocument/ev-debug.h
index 7acb41f..e97cdf4 100644
--- a/libdocument/ev-debug.h
+++ b/libdocument/ev-debug.h
@@ -87,8 +87,8 @@ typedef enum {
 	EV_PROFILE_JOBS = 1 << 0
 } EvProfileSection;
 
-void ev_debug_init     (void);
-void ev_debug_shutdown (void);
+void _ev_debug_init     (void);
+void _ev_debug_shutdown (void);
 
 void ev_debug_message  (EvDebugSection   section,
 			const gchar     *file,
diff --git a/libdocument/ev-file-helpers.c b/libdocument/ev-file-helpers.c
index 9c65aa5..e48ce9d 100644
--- a/libdocument/ev-file-helpers.c
+++ b/libdocument/ev-file-helpers.c
@@ -75,12 +75,12 @@ ev_tmp_dir (void)
 }
 
 void
-ev_file_helpers_init (void)
+_ev_file_helpers_init (void)
 {
 }
 
 void
-ev_file_helpers_shutdown (void)
+_ev_file_helpers_shutdown (void)
 {	
 	if (tmp_dir != NULL)	
 		g_rmdir (tmp_dir);
diff --git a/libdocument/ev-file-helpers.h b/libdocument/ev-file-helpers.h
index 51d763d..adec69c 100644
--- a/libdocument/ev-file-helpers.h
+++ b/libdocument/ev-file-helpers.h
@@ -38,9 +38,9 @@ typedef enum {
 
 const gchar *ev_tmp_dir               (void);
 
-void         ev_file_helpers_init     (void);
+void        _ev_file_helpers_init     (void);
 
-void         ev_file_helpers_shutdown (void);
+void        _ev_file_helpers_shutdown (void);
 
 gboolean     ev_dir_ensure_exists     (const gchar       *dir,
                                        int                mode);
diff --git a/libdocument/ev-init.c b/libdocument/ev-init.c
new file mode 100644
index 0000000..34b323c
--- /dev/null
+++ b/libdocument/ev-init.c
@@ -0,0 +1,83 @@
+/* this file is part of evince, a gnome document viewer
+ *
+ * Copyright © 2009 Christian Persch
+ *
+ * Evince is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince 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 Lesser
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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.
+ */
+
+#include <config.h>
+
+#include <glib.h>
+
+#include "ev-init.h"
+#include "ev-backends-manager.h"
+#include "ev-debug.h"
+#include "ev-file-helpers.h"
+
+static int ev_init_count;
+
+/**
+ * ev_init:
+ *
+ * Initializes the evince document library.
+ *
+ * You must call this before calling any other function in the evince
+ * document library.
+ *
+ * Returns: %TRUE if any backends were found; %FALSE otherwise
+ */
+gboolean
+ev_init (void)
+{
+        static gboolean have_backends;
+
+        if (ev_init_count++ > 0)
+                return have_backends;
+
+        _ev_debug_init ();
+        _ev_file_helpers_init ();
+        have_backends = _ev_backends_manager_init ();
+
+        return have_backends;
+}
+
+/**
+ * ev_shutdown:
+ *
+ * Shuts the evince document library down.
+ */
+void
+ev_shutdown (void)
+{
+        g_assert (_ev_is_initialized ());
+
+        if (--ev_init_count > 0)
+                return;
+
+        _ev_backends_manager_shutdown ();
+        _ev_file_helpers_shutdown ();
+        _ev_debug_shutdown ();
+}
+
+/*
+ * _ev_is_initialized:
+ *
+ * Returns: %TRUE if the evince document library has been initialized
+ */
+gboolean
+_ev_is_initialized (void)
+{
+        return ev_init_count > 0;
+}
diff --git a/libdocument/ev-init.h b/libdocument/ev-init.h
new file mode 100644
index 0000000..976429c
--- /dev/null
+++ b/libdocument/ev-init.h
@@ -0,0 +1,39 @@
+/* this file is part of evince, a gnome document viewer
+ *
+ * Copyright © 2009 Christian Persch
+ *
+ * Evince is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Evince 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 Lesser
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser 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.
+ */
+
+#if !defined (__EV_EVINCE_DOCUMENT_H_INSIDE__) && !defined (EVINCE_COMPILATION)
+#error "Only <evince-document.h> can be included directly."
+#endif
+
+#ifndef EV_INIT_H
+#define EV_INIT_H
+
+#include <glib.h>
+
+G_BEGIN_DECLS
+
+gboolean    ev_init           (void);
+
+void        ev_shutdown       (void);
+
+gboolean   _ev_is_initialized (void);
+
+G_END_DECLS
+
+#endif /* EV_INIT_H */