How to resolve a (currentTiddler) variable when in use as a parameter for a js macro?

[NT]

What works:

1.

A "normal" macro

\define d1jpg(filename) 

[img[./path/$filename$.jpg]]

\end

called like this

<<d1jpg "$(currentTiddler)$">>

where "$(currentTiddler)$" is replaced by the title of the calling tiddler.

2.

A javascript macro 

/*\
title: $:/macros/mine/pathtype.js
type: application/javascript
module-type: macro
<<pathtype $filename$>>
Example:
<<pathtype "20150331_195734.mp4#t=0,17">>
\*/
(function(){
/*jslint node: true, browser: true */
/*global $tw: true */
"use strict";
exports.name = "pathtype";
exports.params = [
  { name: "filename" }
];
/*
Run the macro
*/
exports.run = function(filename) {
return filename;
};
})();

called with a "normal" string as parameter like this

<<pathtype "20150331_195734.mp4#t=0,17">>

------

What's not working (or not working as expected / wanted):

A js macro like the above called with wikitext variable (currentTiddler) like

<<pathtype "$(currentTiddler)$">>

because the variable is not resolved to it's value, but it's name treated as string.

--> Question: What to change either in the call or in the js-macro so that the currentTiddler variable is resolved to the title of the tiddler within the js function?

Thanks for your patience, I am still struggling with the wiki syntax.

Kind regards.

[BJ]

HI NT, try this:

 <$macrocall $name="pathtype" filename="<<currentTiddler>>"/>

all the best
BJ

[NT]

Am Samstag, 5. Dezember 2015 00:47:03 UTC+1 schrieb BJ:

HI NT, try this:

 <$macrocall $name="pathtype" filename="<<currentTiddler>>"/>

all the best
BJ

Hey BJ, thanks for suggestions!

OK, this works partly, but I spotted a strange behavior.

If I just return the filename inside the js function your solution works fine and the currentTiddler variable is resolved to it's value.

But if I want to return something from the js function like 

"[img[" + path + filename + ".jpg" + "]]" 

(the variable concatenated inside a string)

the result is something like 

[img[./path/<<currentTiddler>>.jpg]]

so again the variable is not resolved.

Seems I have to change something inside the js function or the way I return it.

Can you tell me what or how to do it? 

[Eric Shulman]

On Saturday, December 5, 2015 at 3:44:25 AM UTC-8, NT wrote:

Am Samstag, 5. Dezember 2015 00:47:03 UTC+1 schrieb BJ:

 <$macrocall $name="pathtype" filename="<<currentTiddler>>"/>

the result is something like 

[img[./path/<<currentTiddler>>.jpg]]

so again the variable is not resolved.

Seems I have to change something inside the js function or the way I return it.

The syntax for widget parameters support the following general use-cases:

   foo="literal string"

   foo=<<someVariable>>

   foo={{TiddlerName!!fieldname}}

   foo={{DataTiddlerName##index}}

In your example, you have quotes around "<<currentTiddler>>", which makes it a literal text string, rather than getting it's current value.  Remove the quotes around "<<currentTiddler>>" and it should work.

enjoy,

-e

Eric Shulman

ELS Design Studios

TiddlyTools - "Small Tools for Big Ideas!"

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[NT]

Thank you Eric, this was the solution for me and your short summary was quite informative.