1 /* this file is part of evince, a gnome document viewer
3 * Copyright (C) 2007 Carlos Garcia Campos <carlosgc@gnome.org>
5 * Evince is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
10 * Evince is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License for more details.
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
22 #include <glib/gstdio.h>
24 #include "ev-module.h"
25 #include "ev-backends-manager.h"
27 static GList *ev_backends_list = NULL;
29 typedef struct _EvBackendInfo EvBackendInfo;
30 struct _EvBackendInfo {
40 #define EV_BACKENDS_GROUP "Evince Backend"
41 #define EV_BACKENDS_EXTENSION ".evince-backend"
44 ev_backend_info_free (EvBackendInfo *info)
46 g_free (info->module_name);
47 g_free (info->type_desc);
48 g_strfreev (info->mime_types);
52 static EvBackendInfo *
53 ev_backends_manager_load_backend (const gchar *file)
56 GKeyFile *backend_file = NULL;
59 backend_file = g_key_file_new ();
60 if (!g_key_file_load_from_file (backend_file, file, G_KEY_FILE_NONE, &error)) {
61 g_warning ("Error opening backend file %s: %s",
62 file, error->message);
64 g_key_file_free (backend_file);
69 info = g_new0 (EvBackendInfo, 1);
70 info->module_name = g_key_file_get_string (backend_file, EV_BACKENDS_GROUP,
72 if (!info->module_name) {
73 g_warning ("Bad evince backend file %s: Could not find 'Module'",
75 ev_backend_info_free (info);
76 g_key_file_free (backend_file);
81 info->type_desc = g_key_file_get_locale_string (backend_file, EV_BACKENDS_GROUP,
82 "TypeDescription", NULL, NULL);
83 if (!info->type_desc) {
84 g_warning ("Bad evince backend file %s: Could not find 'TypeDescription'",
86 ev_backend_info_free (info);
87 g_key_file_free (backend_file);
92 info->mime_types = g_key_file_get_string_list (backend_file, EV_BACKENDS_GROUP,
93 "MimeType", NULL, NULL);
94 if (!info->mime_types) {
95 g_warning ("Bad evince backend file %s: Could not find 'MimeType'",
97 ev_backend_info_free (info);
98 g_key_file_free (backend_file);
103 g_key_file_free (backend_file);
109 ev_backends_manager_load (void)
113 GError *error = NULL;
115 dir = g_dir_open (EV_BACKENDSDIR, 0, &error);
117 g_warning (error->message);
118 g_error_free (error);
123 while ((dirent = g_dir_read_name (dir))) {
127 if (!g_str_has_suffix (dirent, EV_BACKENDS_EXTENSION))
130 file = g_build_filename (EV_BACKENDSDIR, dirent, NULL);
131 info = ev_backends_manager_load_backend (file);
137 ev_backends_list = g_list_prepend (ev_backends_list, info);
144 ev_backends_manager_init (void)
146 if (ev_backends_list)
149 return ev_backends_manager_load ();
153 ev_backends_manager_shutdown (void)
155 g_list_foreach (ev_backends_list, (GFunc)ev_backend_info_free, NULL);
156 g_list_free (ev_backends_list);
157 ev_backends_list = NULL;
160 static EvBackendInfo *
161 ev_backends_manager_get_backend_info (const gchar *mime_type)
165 for (l = ev_backends_list; l; l = g_list_next (l)) {
170 info = (EvBackendInfo *)l->data;
172 while ((mime = info->mime_types[i++])) {
173 if (g_ascii_strcasecmp (mime, mime_type) == 0)
182 ev_backends_manager_get_document (const gchar *mime_type)
184 EvDocument *document;
187 info = ev_backends_manager_get_backend_info (mime_type);
194 path = g_module_build_path (EV_BACKENDSDIR, info->module_name);
195 info->module = G_TYPE_MODULE (ev_module_new (path));
199 if (!g_type_module_use (info->module)) {
200 g_warning ("Cannot load backend '%s' since file '%s' cannot be read.",
202 ev_module_get_path (EV_MODULE (info->module)));
203 g_object_unref (G_OBJECT (info->module));
209 document = EV_DOCUMENT (ev_module_new_object (EV_MODULE (info->module)));
210 g_type_module_unuse (info->module);
215 static EvBackendInfo *
216 get_document_backend_info (EvDocument *document)
220 for (l = ev_backends_list; l; l = g_list_next (l)) {
224 info = (EvBackendInfo *)l->data;
229 type_id = ev_module_get_object_type (EV_MODULE (info->module));
231 if (G_TYPE_CHECK_INSTANCE_TYPE (document, type_id)) {
240 ev_backends_manager_get_document_module_name (EvDocument *document)
244 info = get_document_backend_info (document);
245 return info ? info->module_name : NULL;
249 ev_type_info_new (const gchar *desc, const gchar **mime_types)
253 info = g_new (EvTypeInfo, 1);
256 info->mime_types = mime_types;
262 ev_backends_manager_get_document_type_info (EvDocument *document)
266 info = get_document_backend_info (document);
268 ev_type_info_new (info->type_desc,
269 (const gchar **)info->mime_types)
274 ev_backends_manager_get_all_types_info (void)
277 GList *retval = NULL;
279 for (l = ev_backends_list; l; l = g_list_next (l)) {
281 EvTypeInfo *type_info;
283 info = (EvBackendInfo *)l->data;
285 type_info = ev_type_info_new (info->type_desc,
286 (const gchar **)info->mime_types);
287 retval = g_list_prepend (retval, type_info);