How to create custom $link widget and use $wikify

1

I’m trying to create a custom link widget that will let me have a tooltip that previews some of the text of the linked tiddler. The code below works if you take out the $wikify. But I want the tooltip to display the rendered text. But when I use $wikify I get a recursive error.

I know there’s an old Tobias plugin that does this, but wouldn’t it be great if it could work with the new toolset from 5.3.0 ?

Thanks!

Kind of like a human LLM, I cobbled this code from these two threads:

\widget $link()
<$parameters $params="params-var">
   <$let newtip={{{[<params-var>jsonget[to]get[text]split[]limit[50]join[]]}}} >
<$wikify text=<<newtip>> name="newtip2" output="text">
	<$genesis
			$type="$link"
			$remappable="no"
			$names="[<params-var>jsonindexes[]] =[[tooltip]]"
			$values="[<params-var>jsonindexes[]] :map[<params-var>jsonget<currentTiddler>] =[<newtip2>]"
			>
	</$genesis>
</$wikify>
   </$let>
</$parameters>
\end

* <$link to="HelloThere" tooltip="something">has a tooltip link</$link> to a tiddler
* [[HelloThere]] is a tiddler in TiddlyWiki.
2

I suspect the problem is due to links being rendered within the wikify widget and this leading to recursion, though this is merely a suspicion. Perhaps try the example with camel case links disabled?

Another potential approach might look like this:

\widget $link()
	\procedure tv-wikilink-tooltip()
	<$let newtip={{{[<currentTiddler>get[text]split[]limit[50]join[]]}}} tv-wikilinks="no">
		<$wikify text=<<newtip>> name="newtip2" output="text">
			<$transclude $variable="newtip2"/>
		</$wikify>
	</$let>
	\end tv-wikilink-tooltip
<$parameters $params="params-var">
	<$genesis
		$type="$link"
		$remappable="no"
		$names="[<params-var>jsonindexes[]]"
		$values="[<params-var>jsonindexes[]] :map[<params-var>jsonget<currentTiddler>]"
	>
	<$slot $name="ts-raw"/>
	</$genesis>
</$parameters>
\end
3

Thanks for the code and the clever work-around!

I still don’t understand why $wikify should cause recursion, especially if output mode is “text”. There may not be a handy background variable for other apps.

I guess everyone already knew that you can’t apply rendering to a tooltip. TIL …

Thanks!

4

Unfortunately I don’t have an example on hand as I scrapped the approach, but I’ve encountered recursion errors with custom $link widgets before, and I’m 99% sure I was not using $wikify. I wonder whether there’s something else going on here.

5

The wikify widget needs to render your wikitext first and then extract the plain text representation for it.

6

But if the incoming WikiText has no links, then why should it recurse?

Recursion drives me in circles.

7

Have you confirmed that recursion errors occur even when the text to be wikified has no links?

8

Oh, you’re right. Although I don’t understand why. My filter looks for the first 50 characters of a tiddler. There is no link in the first 50 characters of tiddler TiddlyWiki . But $wikify must be somehow reading the entire thing ?? Anyways, when I turn off camelcase for TiddlyWiki, it doesn’t recurse. (Also I switched “HelloThere” to “HelloThere2”).

I’m late to the custom widgets game. Another thing is that you apparently need a blank line inside of the $genesis widget (or the $slot widget) in order to see the contents (in this case, the linked text).