2005-07-05  Marco Pesenti Gritti  <mpg@redhat.com>

        * backend/Makefile.am:
        * backend/ev-document-factory.c:
        (mime_type_supported_by_gdk_pixbuf),
        (ev_document_type_get_from_mime),
        (ev_document_factory_get_document),
        (ev_document_factory_get_backend),
        (ev_document_factory_get_mime_types),
        (ev_document_factory_get_all_mime_types):
        * backend/ev-document-factory.h:
        * shell/Makefile.am:
        * shell/ev-document-types.c: (get_document_from_uri),
        (ev_document_types_get_document),
        (file_filter_add_mime_list_and_free),
        (ev_document_types_add_filters):
        * shell/ev-document-types.h:
        * shell/ev-job-xfer.c: (ev_job_xfer_run):
        * shell/ev-properties-dialog.c:
        (ev_properties_dialog_set_document):
        * shell/ev-window.c: (ev_window_cmd_file_open),
        (ev_window_cmd_save_as):
        * thumbnailer/evince-thumbnailer.c: (evince_thumbnail_pngenc_get):

        Rework document types managing to avoid code duplication
        and actually abstract from backend implementations.
        Also provide a minimal factory api that can be used by
        thumbnailer/properties.