On Sunday, August 9, 2020 at 5:04:13 AM UTC-7, Bob Flandard wrote:
>
> I'm trying and failing to write a filter expression that lists all
> tiddlers that are tagged "some name" (call this list of tiddlers resultA)
> and then extend that list to include all tiddlers that are tagged with the
> names in resultA. For the general case this would continue recursively
> until no new tiddlers were added to the list.
>
I did exactly this function as part of the InsideTW "page navigation"
interface.
It does a recursive "walk" of a "tag tree", and generates a flat list of
tiddler titles:
\define toc-list(here,max,exclude,level:"1")
<$list filter="""[tag[$here$]] $exclude$ -[[$here$]]""">
<$link /><br>
<$reveal default="$level$" type="nomatch" text="$max$">
<$macrocall $name="toc-list" here=<<currentTiddler>> max="$max$"
exclude="""$exclude$ -[[$here$]]""" level={{{ [[$level$]add[1]] }}}/>
</$reveal>
</$list>
\end
Invoke it like this:
<<toc-list "some name">>
where "some name" is the top-level tag for your tree.
Notes:
1) There is also an optional "max" parameter to limit the depth of traversal
2) The "exclude" and "level" parameters are only for internal use by the
macro itself
3) The default output just lists each title, one per line. If you want a
bullet list, you could change this line:
<$link /><br>
to this:
<li><$link /></li>
and if you want a numbered list, also wrap the macro invocation within
<ol>...</ol>, like this:
<ol><<toc-list "some name">></ol>
enjoy,
-e
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