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/* this file is part of evince, a gnome document viewer
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* Copyright (C) 2007 Carlos Garcia Campos <carlosgc@gnome.org>
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* Evince is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* Evince is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#include <glib/gstdio.h>
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#include "ev-module.h"
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#include "ev-backends-manager.h"
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static GList *ev_backends_list = NULL;
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typedef struct _EvBackendInfo EvBackendInfo;
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struct _EvBackendInfo {
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#define EV_BACKENDS_GROUP "Evince Backend"
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#define EV_BACKENDS_EXTENSION ".evince-backend"
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static gchar *backendsdir = NULL;
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dir = g_win32_get_package_installation_directory_of_module (NULL);
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backendsdir = g_build_filename (dir, "lib", "evince",
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EV_BACKENDSBINARYVERSION,
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backendsdir = g_strdup (EV_BACKENDSDIR);
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ev_backend_info_free (EvBackendInfo *info)
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g_free (info->module_name);
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g_free (info->type_desc);
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g_strfreev (info->mime_types);
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static EvBackendInfo *
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ev_backends_manager_load_backend (const gchar *file)
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GKeyFile *backend_file = NULL;
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backend_file = g_key_file_new ();
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if (!g_key_file_load_from_file (backend_file, file, G_KEY_FILE_NONE, &error)) {
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g_warning ("Error opening backend file %s: %s",
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file, error->message);
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g_key_file_free (backend_file);
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info = g_new0 (EvBackendInfo, 1);
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info->module_name = g_key_file_get_string (backend_file, EV_BACKENDS_GROUP,
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if (!info->module_name) {
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g_warning ("Bad evince backend file %s: Could not find 'Module'",
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ev_backend_info_free (info);
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g_key_file_free (backend_file);
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info->resident = g_key_file_get_boolean (backend_file, EV_BACKENDS_GROUP,
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info->type_desc = g_key_file_get_locale_string (backend_file, EV_BACKENDS_GROUP,
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"TypeDescription", NULL, NULL);
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if (!info->type_desc) {
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g_warning ("Bad evince backend file %s: Could not find 'TypeDescription'",
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ev_backend_info_free (info);
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g_key_file_free (backend_file);
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info->mime_types = g_key_file_get_string_list (backend_file, EV_BACKENDS_GROUP,
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"MimeType", NULL, NULL);
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if (!info->mime_types) {
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g_warning ("Bad evince backend file %s: Could not find 'MimeType'",
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ev_backend_info_free (info);
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g_key_file_free (backend_file);
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g_key_file_free (backend_file);
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ev_backends_manager_load (void)
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GError *error = NULL;
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dir = g_dir_open (backends_dir(), 0, &error);
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g_warning ("%s", error->message);
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g_error_free (error);
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while ((dirent = g_dir_read_name (dir))) {
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if (!g_str_has_suffix (dirent, EV_BACKENDS_EXTENSION))
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file = g_build_filename (backends_dir(), dirent, NULL);
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info = ev_backends_manager_load_backend (file);
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ev_backends_list = g_list_prepend (ev_backends_list, info);
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return ev_backends_list != NULL;
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* _ev_backends_manager_init:
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* Initializes the evince backends manager.
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* Returns: %TRUE if there were any backends found; %FALSE otherwise
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_ev_backends_manager_init (void)
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if (ev_backends_list)
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return ev_backends_manager_load ();
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* _ev_backends_manager_shutdown:
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* Shuts the evince backends manager down.
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_ev_backends_manager_shutdown (void)
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g_list_foreach (ev_backends_list, (GFunc)ev_backend_info_free, NULL);
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g_list_free (ev_backends_list);
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ev_backends_list = NULL;
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g_free (backendsdir);
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static EvBackendInfo *
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ev_backends_manager_get_backend_info (const gchar *mime_type)
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for (l = ev_backends_list; l; l = g_list_next (l)) {
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info = (EvBackendInfo *)l->data;
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while ((mime = info->mime_types[i++])) {
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if (g_ascii_strcasecmp (mime, mime_type) == 0)
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ev_backends_manager_get_document (const gchar *mime_type)
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EvDocument *document;
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info = ev_backends_manager_get_backend_info (mime_type);
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path = g_module_build_path (backends_dir(), info->module_name);
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info->module = G_TYPE_MODULE (ev_module_new (path, info->resident));
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if (!g_type_module_use (info->module)) {
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g_warning ("Cannot load backend '%s' since file '%s' cannot be read.",
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ev_module_get_path (EV_MODULE (info->module)));
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g_object_unref (G_OBJECT (info->module));
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document = EV_DOCUMENT (ev_module_new_object (EV_MODULE (info->module)));
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g_type_module_unuse (info->module);
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static EvBackendInfo *
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get_document_backend_info (EvDocument *document)
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for (l = ev_backends_list; l; l = g_list_next (l)) {
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info = (EvBackendInfo *)l->data;
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type_id = ev_module_get_object_type (EV_MODULE (info->module));
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if (G_TYPE_CHECK_INSTANCE_TYPE (document, type_id)) {
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ev_backends_manager_get_document_module_name (EvDocument *document)
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info = get_document_backend_info (document);
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return info ? info->module_name : NULL;
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ev_type_info_new (const gchar *desc, const gchar **mime_types)
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info = g_new (EvTypeInfo, 1);
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info->mime_types = mime_types;
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ev_backends_manager_get_document_type_info (EvDocument *document)
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info = get_document_backend_info (document);
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ev_type_info_new (info->type_desc,
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(const gchar **)info->mime_types)
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ev_backends_manager_get_all_types_info (void)
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GList *retval = NULL;
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for (l = ev_backends_list; l; l = g_list_next (l)) {
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EvTypeInfo *type_info;
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info = (EvBackendInfo *)l->data;
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type_info = ev_type_info_new (info->type_desc,
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(const gchar **)info->mime_types);
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retval = g_list_prepend (retval, type_info);
added
removed
libdocument/ev-backends-manager.c
