New files, handling the mapping from mimetypes to backends

2005-04-18  David Malcolm  <dmalcolm@redhat.com>

	* shell/ev-document-types.h:
	* shell/ev-document-types.c:
	New files, handling the mapping from mimetypes to backends

	* shell/ev-window.c:
	* thumbnailer/evince-thumbnailer.c:
	Use the ev-document-types code

	* shell/Makefile.am:
	Added new convenience library libevbackendfactory_la, containing
	the new mimetype->backend logic; moved the backends into it.

	* thumbnailer/Makefile.am:
	Make the thumbnailer link with the libevbackend.la convenience
	library, rather than having a duplicate of the backend logic here.

1 files changed, 124 insertions, 0 deletions

diff --git a/shell/ev-document-types.c b/shell/ev-document-types.c
new file mode 100644
index 0000000..cc7734f
--- /dev/null
+++ b/shell/ev-document-types.c
@@ -0,0 +1,124 @@
+/* -*- 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "ev-document-types.h"
+
+/* The various document type backends: */
+#include "ev-poppler.h"
+#include "pixbuf-document.h"
+#include "ps-document.h"
+#ifdef ENABLE_DVI
+#include "dvi-document.h"
+#endif
+#ifdef ENABLE_DJVU
+#include "djvu-document.h"
+#endif
+
+#include <string.h>
+
+typedef struct _EvDocumentType EvDocumentType;
+struct _EvDocumentType
+{
+	const char *mime_type;
+	GType (*document_type_factory_callback)();
+};
+
+const EvDocumentType document_types[] = {
+	/* PDF: */
+	{"application/pdf",            pdf_document_get_type},
+
+	/* Postscript: */
+	{"application/postscript",     ps_document_get_type},
+	{"application/x-gzpostscript", ps_document_get_type},
+	{"image/x-eps",                ps_document_get_type},
+
+#ifdef ENABLE_DJVU
+	/* djvu: */
+	{"image/vnd.djvu",             djvu_document_get_type),
+#endif		
+
+#ifdef ENABLE_DVI
+	/* dvi: */
+	{"application/x-dvi",          dvi_document_get_type},
+#endif
+};
+
+/* Would be nice to have this in gdk-pixbuf */
+static gboolean
+mime_type_supported_by_gdk_pixbuf (const gchar *mime_type)
+{
+	GSList *formats, *list;
+	gboolean retval = FALSE;
+
+	formats = gdk_pixbuf_get_formats ();
+
+	list = formats;
+	while (list) {
+		GdkPixbufFormat *format = list->data;
+		int i;
+		gchar **mime_types;
+
+		if (gdk_pixbuf_format_is_disabled (format))
+			continue;
+
+		mime_types = gdk_pixbuf_format_get_mime_types (format);
+
+		for (i = 0; mime_types[i] != NULL; i++) {
+			if (strcmp (mime_types[i], mime_type) == 0) {
+				retval = TRUE;
+				break;
+			}
+		}
+
+		if (retval)
+			break;
+
+		list = list->next;
+	}
+
+	g_slist_free (formats);
+
+	return retval;
+}
+
+GType
+ev_document_type_lookup (const char *mime_type)
+{
+	int i;
+
+	g_return_val_if_fail (mime_type, G_TYPE_INVALID);
+
+	for (i=0;i<G_N_ELEMENTS (document_types);i++) {
+		if (0==strcmp(mime_type, document_types[i].mime_type)) {
+			g_assert (document_types[i].document_type_factory_callback!=NULL);
+			return document_types[i].document_type_factory_callback();
+		}
+	}
+
+	if (mime_type_supported_by_gdk_pixbuf (mime_type)) {
+		return pixbuf_document_get_type ();
+	}
+
+	return G_TYPE_INVALID;
+}