/* -*- Mode: C; tab-width: 8; indent-tabs-mode: t; c-basic-offset: 8; c-indent-level: 8 -*- */ /* * Copyright (C) 2005, Red Hat, Inc. * * 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, 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 <string.h> #include <gio/gio.h> #include <glib/gstdio.h> #include <glib/gi18n-lib.h> #include <gtk/gtk.h> #include "ev-backends-manager.h" #include "ev-document-factory.h" #include "ev-file-helpers.h" #ifdef ENABLE_PIXBUF static GList* gdk_pixbuf_mime_type_list () { GSList *formats, *list; GList *result = NULL; formats = gdk_pixbuf_get_formats (); for (list = formats; list != NULL; list = list->next) { GdkPixbufFormat *format = list->data; gchar **mime_types; if (gdk_pixbuf_format_is_disabled (format)) continue; mime_types = gdk_pixbuf_format_get_mime_types (format); result = g_list_prepend (result, mime_types); } g_slist_free (formats); return result; } /* Would be nice to have this in gdk-pixbuf */ static gboolean mime_type_supported_by_gdk_pixbuf (const gchar *mime_type) { GList *mime_types; GList *list; gboolean retval = FALSE; mime_types = gdk_pixbuf_mime_type_list (); for (list = mime_types; list; list = list->next) { gchar **mtypes = (gchar **)list->data; const gchar *mtype; gint i = 0; while ((mtype = mtypes[i++])) { if (strcmp (mtype, mime_type) == 0) { retval = TRUE; break; } } } g_list_foreach (mime_types, (GFunc)g_strfreev, NULL); g_list_free (mime_types); return retval; } #endif /* ENABLE_PIXBUF */ static EvCompressionType get_compression_from_mime_type (const gchar *mime_type) { gchar type[3]; gchar *p; if (!(p = g_strrstr (mime_type, "/"))) return EV_COMPRESSION_NONE; if (sscanf (++p, "x-%2s%*s", type) == 1) { if (g_ascii_strcasecmp (type, "gz") == 0) return EV_COMPRESSION_GZIP; else if (g_ascii_strcasecmp (type, "bz") == 0) return EV_COMPRESSION_BZIP2; else if (g_ascii_strcasecmp (type, "xz") == 0) return EV_COMPRESSION_LZMA; } return EV_COMPRESSION_NONE; } /* * get_document_from_uri: * @uri: the document URI * @fast: whether to use fast MIME type detection * @compression: a location to store the document's compression type * @error: a #GError location to store an error, or %NULL * * Creates a #EvDocument instance for the document at @uri, using either * fast or slow MIME type detection. If a document could be created, * @compression is filled in with the document's compression type. * On error, %NULL is returned and @error filled in. * * Returns: a new #EvDocument instance, or %NULL on error with @error filled in */ static EvDocument * get_document_from_uri (const char *uri, gboolean fast, EvCompressionType *compression, GError **error) { EvDocument *document = NULL; gchar *mime_type = NULL; GError *err = NULL; *compression = EV_COMPRESSION_NONE; mime_type = ev_file_get_mime_type (uri, fast, &err); if (mime_type == NULL) { g_free (mime_type); if (err == NULL) { g_set_error_literal (error, EV_DOCUMENT_ERROR, EV_DOCUMENT_ERROR_INVALID, _("Unknown MIME Type")); } else { g_propagate_error (error, err); } return NULL; } document = ev_backends_manager_get_document (mime_type); #ifdef ENABLE_PIXBUF if (!document && mime_type_supported_by_gdk_pixbuf (mime_type)) document = ev_backends_manager_get_document ("image/*"); #endif /* ENABLE_PIXBUF */ if (document == NULL) { gchar *content_type, *mime_desc = NULL; content_type = g_content_type_from_mime_type (mime_type); if (content_type) mime_desc = g_content_type_get_description (content_type); g_set_error (error, EV_DOCUMENT_ERROR, EV_DOCUMENT_ERROR_INVALID, _("File type %s (%s) is not supported"), mime_desc ? mime_desc : "-", mime_type); g_free (mime_desc); g_free (content_type); g_free (mime_type); return NULL; } *compression = get_compression_from_mime_type (mime_type); g_free (mime_type); return document; } static void free_uncompressed_uri (gchar *uri_unc) { if (!uri_unc) return; ev_tmp_uri_unlink (uri_unc); g_free (uri_unc); } /** * ev_document_factory_get_document: * @uri: an URI * @error: a #GError location to store an error, or %NULL * * Creates a #EvDocument for the document at @uri; or, if no backend handling * the document's type is found, or an error occurred on opening the document, * returns %NULL and fills in @error. * If the document is encrypted, it is returned but also @error is set to * %EV_DOCUMENT_ERROR_ENCRYPTED. * * Returns: (transfer full): a new #EvDocument, or %NULL. */ EvDocument * ev_document_factory_get_document (const char *uri, GError **error) { EvDocument *document; int result; EvCompressionType compression; gchar *uri_unc = NULL; GError *err = NULL; g_return_val_if_fail (uri != NULL, NULL); document = get_document_from_uri (uri, TRUE, &compression, &err); g_assert (document != NULL || err != NULL); if (document != NULL) { uri_unc = ev_file_uncompress (uri, compression, &err); if (uri_unc) { g_object_set_data_full (G_OBJECT (document), "uri-uncompressed", uri_unc, (GDestroyNotify) free_uncompressed_uri); } else if (err != NULL) { /* Error uncompressing file */ g_object_unref (document); g_propagate_error (error, err); return NULL; } result = ev_document_load (document, uri_unc ? uri_unc : uri, &err); if (result == FALSE || err) { if (err && g_error_matches (err, EV_DOCUMENT_ERROR, EV_DOCUMENT_ERROR_ENCRYPTED)) { g_propagate_error (error, err); return document; } /* else fall through to slow mime code section below */ } else { return document; } g_object_unref (document); document = NULL; } /* Try again with slow mime detection */ g_clear_error (&err); uri_unc = NULL; document = get_document_from_uri (uri, FALSE, &compression, &err); if (document == NULL) { g_assert (err != NULL); g_propagate_error (error, err); return NULL; } uri_unc = ev_file_uncompress (uri, compression, &err); if (uri_unc) { g_object_set_data_full (G_OBJECT (document), "uri-uncompressed", uri_unc, (GDestroyNotify) free_uncompressed_uri); } else if (err != NULL) { /* Error uncompressing file */ g_propagate_error (error, err); g_object_unref (document); return NULL; } result = ev_document_load (document, uri_unc ? uri_unc : uri, &err); if (result == FALSE) { if (err == NULL) { /* FIXME: this really should not happen; the backend should * always return a meaningful error. */ g_set_error_literal (&err, EV_DOCUMENT_ERROR, EV_DOCUMENT_ERROR_INVALID, _("Unknown MIME Type")); } else if (g_error_matches (err, EV_DOCUMENT_ERROR, EV_DOCUMENT_ERROR_ENCRYPTED)) { g_propagate_error (error, err); return document; } g_object_unref (document); document = NULL; g_propagate_error (error, err); } return document; } static void file_filter_add_mime_types (EvTypeInfo *info, GtkFileFilter *filter) { const gchar *mime_type; gint i = 0; #ifdef ENABLE_PIXBUF if (g_ascii_strcasecmp (info->mime_types[0], "image/*") == 0) { GList *pixbuf_types, *l; pixbuf_types = gdk_pixbuf_mime_type_list (); for (l = pixbuf_types; l; l = g_list_next (l)) { gchar **mime_types = (gchar **)l->data; gint j = 0; while ((mime_type = mime_types[j++])) gtk_file_filter_add_mime_type (filter, mime_type); g_strfreev (mime_types); } g_list_free (pixbuf_types); return; } #endif /* ENABLE_PIXBUF */ while ((mime_type = info->mime_types[i++])) gtk_file_filter_add_mime_type (filter, mime_type); } /** * ev_document_factory_add_filters: * @chooser: a #GtkFileChooser * @document: a #EvDocument, or %NULL * * Adds some file filters to @chooser. * Always add a "All documents" format. * * If @document is not %NULL, adds a #GtkFileFilter for @document's MIME type. * * If @document is %NULL, adds a #GtkFileFilter for each document type that atril * can handle. */ void ev_document_factory_add_filters (GtkWidget *chooser, EvDocument *document) { GList *all_types; GtkFileFilter *filter; GtkFileFilter *default_filter; GtkFileFilter *document_filter; g_return_if_fail (GTK_IS_FILE_CHOOSER (chooser)); g_return_if_fail (document == NULL || EV_IS_DOCUMENT (document)); all_types = ev_backends_manager_get_all_types_info (); default_filter = document_filter = filter = gtk_file_filter_new (); gtk_file_filter_set_name (filter, _("All Documents")); g_list_foreach (all_types, (GFunc)file_filter_add_mime_types, filter); gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), filter); if (document) { EvTypeInfo *info; info = ev_backends_manager_get_document_type_info (document); default_filter = filter = gtk_file_filter_new (); gtk_file_filter_set_name (filter, info->desc); file_filter_add_mime_types (info, filter); g_free (info); gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), filter); } else { GList *l; for (l = all_types; l; l = g_list_next (l)){ EvTypeInfo *info; info = (EvTypeInfo *)l->data; default_filter = filter = gtk_file_filter_new (); gtk_file_filter_set_name (filter, info->desc); file_filter_add_mime_types (info, filter); gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), filter); } } g_list_foreach (all_types, (GFunc)g_free, NULL); g_list_free (all_types); filter = gtk_file_filter_new (); gtk_file_filter_set_name (filter, _("All Files")); gtk_file_filter_add_pattern (filter, "*"); gtk_file_chooser_add_filter (GTK_FILE_CHOOSER (chooser), filter); gtk_file_chooser_set_filter (GTK_FILE_CHOOSER (chooser), document == NULL ? document_filter : default_filter); }