Creating new tiddler types

[stefano franchi]

How does the addition of new tiddler types work?

From reading the railroad plugin code and the tw-dev pages on Parser and Widget, I gather that it is as simple as creating a new parser module and assigning the newly defined type to a specific widget.

Railroad does it in its  super-simple typed-parser.js module:

```

(function(){

/*jslint node: true, browser: true */
/*global $tw: false */
"use strict";

var RailroadParser = function(type,text,options) {
    var element = {
            type: "railroad",
            tag: "$railroad",
            text: text
        };
    this.tree = [element];
console.log(text);
};

exports["text/vnd.tiddlywiki.railroad"] = RailroadParser;

})();

...

The intent is clear, and the code could not be simpler. It maps the new  tiddler type text/vnd.tiddlywiki.railroad to the railroad plugin. But it feels like a bit of magic. Where is that mapping actually established?  I have not been able to find how it  actually implemented  in the core, and I would like to get a better grasp of the overall mechanism. Where should I look?

Cheers,

S.

--

__________________________________________________
Stefano Franchi

stefano...@gmail.com
http://stefano.cleinias.org

[Jeremy Ruston]

Hi Stefano

I think you've got it exactly right. The details tying the mechanism together are in the wiki.parseText() method.

Best wishes

Jeremy

--

Jeremy Ruston

jer...@jermolene.com

https://jermolene.com

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[stefano franchi]

On Sat, Feb 16, 2019 at 3:51 AM Jeremy Ruston <jeremy...@gmail.com> wrote:

Hi Stefano

I think you've got it exactly right. The details tying the mechanism together are in the wiki.parseText() method.

Thanks Jeremy,

now I finally get it. Inturn, it is the wiki.initParsers() method that sets up the mapping. I had totally missed that.

Cheers,

S.