@Eric: Thanbk you.
This works nicely and is, of course, quite extensible to sites like
TiddlyWikiLinks.
Cheers,
Hans
On Saturday, April 24, 2021 at 8:30:04 AM UTC-4 Eric Shulman wrote:
> On Saturday, April 24, 2021 at 3:16:22 AM UTC-7 ludwa6 wrote:
>
>> PS to my last: have fixed part of the problem: by adding the suffix
>> clause back into macro (as below), it now pulls not a system-level error
>> msg, but the error msg from wikipedia.org site itself, which seems to be
>> objecting to the .html extension only... yet i can't find a way to remove
>> that w/o reverting to the lower-level error msg. Any insight about this
>> problem would be appreciated!
>
>
> Try this in a tiddler named "ShowWikipediaFrame":
> \define AddTopic(topic) <option value={{{ [[$topic$]encodeuri[]addprefix[
> https://en.wikipedia.org/wiki/]] }}}>$topic$</option>
>
> <$select field="curr-topic">
> <<AddTopic "TiddlyWiki">>
> <<AddTopic "WikiWikiWeb">>
> <<AddTopic "Project Xanadu">>
> </$select> <a href={{!!curr-topic}} title="Open web page in a
> separate window/tab" target="_blank">link</a>
> <iframe src={{!!curr-topic}} height="500" width="100%"></iframe>
>
> Notes:
> * The filter in AddTopic needed a closing "]]". Also, the filter uses
> "encodeuri[]" rather than "split[ ]join[%2520]". This handles all special
> URI characters, not just space.
> * The target tiddler for storing the $select widget value is the *current
> tiddler*, rather than "Wikipedia" (or {{Wikipedia!!title}}) and the
> corresponding <a href=...> and <iframe src=...> params simply fetch
> {{!!curr-topic}} (i.e., from the current tiddler). This allows you
> transclude the above content as a template (e.g., {{||ShowWikipediaFrame}})
> and each transcluded instance can be used to show a different selected
> topic.
>
> enjoy,
> -e
>
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