1 files changed, 397 insertions, 0 deletions
diff --git a/libdocument/ev-document-factory.c b/libdocument/ev-document-factory.c
new file mode 100644
index 00000000..0ace5ec8
--- /dev/null
+++ b/libdocument/ev-document-factory.c
@@ -0,0 +1,397 @@
+/* -*- 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;
+ }
+
+ 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: 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 evince
+ * 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);
+}