Brilliant! Thanks Eric.
Can you suggest any better way to extract the a "excerpt" of a tiddler?
I found this get_extract function searching this forum but it kind of
breaks the text by eating the formatting html. I just want plaintext of the
first 140 characters or so with non-relevant characters replaced by spaces
(and multiple spaces trimmed to one).
Cheers,
Adithya
On Saturday, August 15, 2020 at 9:29:36 PM UTC+5:30 Eric Shulman wrote:
> On Saturday, August 15, 2020 at 8:39:40 AM UTC-7, Adithya B M wrote:
>
>> Please look at the code below. In this, the get-extract() should called
>> if the description field is absent. How could this be made to work?
>>
> \define get_description()
>> <$text text={{{ [<currentTiddler>get[description]else<get-extract
>> <currentTiddler>>] }}} />
>> \end
>>
>> \define get-extract(title)
>> <$wikify name="output" text={{$title$}} mode="block" output="text">
>> <$text text={{{ [<output>split[]first[500]join[]] }}}/>
>> </$wikify>
>> \end
>>
>
> Unfortunately, you can't invoke a macro with parameters from inside a
> filter. Instead, you can "pre-compute" the extract value, and then use the
> filter, like this:
> \define get_description()
> <$wikify name="extract" text={{{ [<currentTiddler>get[text]split[]first[
> 500]join[]] }}}>
> <$text text={{{ [<currentTiddler>get[description]else<extract>] }}} />
> </$wikify>
> \end
> Note that for the $wikify widget, mode="block" and output="text"
> parameters are the defaults, so they can be omitted.
>
> -e
>
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