Re: Parsing XML in shell extension

[Jay Strict <jay strict posteo de>]

On 06.10.2015 17:57, Jay Strict wrote:
> 2) I want to read and parse the XML file that Syncthing uses as its
> configuration file [4]. What is the best way to do so? I found the
> Simple XML Subset Parser [5] in the GLib library and I think this would
> be suitable, as the config file does not look very complex.
> I also found an older thread [6] about this topic, in which it was
> suggested to use E4X. But E4X seems to be obsolete.
> Are there better alternatives? Can Gjs do something like this?

> [4] http://docs.syncthing.net/users/config.html
> [5]
> https://developer.gnome.org/glib/stable/glib-Simple-XML-Subset-Parser.html
> [6]
> https://mail.gnome.org/archives/gnome-shell-list/2012-November/msg00021.html

I want to use the Simple XML Subset Parser from GLib and have the
following source code lines in extension.js (in addition to the
functions init() and enable()).
======================================================================
const GLib = imports.gi.GLib;

const XMLConfigParser = new Lang.Class({
    Name: 'XMLConfigParser',
    Extends: GLib.MarkupParser,

//    _construct : function() {
//    },

    start_element : function(context,
                             element_name,
                             attribute_names,
                             attribute_values,
                             user_data) {
        log ('context: ' + context);
    },
});

let _xmlConfigParser = new XMLConfigParser();
let parseContext = new GLib.MarkupParseContext(_xmlConfigParser, 0, null);
parseContext.parse("Test", 4);
======================================================================



But when trying to load the extension, I get the error message
======================================================================
TypeError: this._construct is undefined
======================================================================


If I add a new empty method "_construct", the error message is
======================================================================
TypeError: Object 0x7fef55023340 is not a subclass of GObject_Boxed,
it's a Object
======================================================================


Does anybody have a hint for me, what I am doing wrong?

Thanks
Jay