If the structure you created was a "perfect" tree, with no double-backs and only one tag per tiddler, then it might not be too hard to do.
But if you have multiple tags, then you could quickly have a large number of possible paths And if any tiddler has a tag that refers to somewhere down in the tree, then you could end up with an endless loop. Workarounds for these problems might including a tag list with the invocation. The tag list would indicate which tags are considered part of the tree. The other thing might be to create a list of tiddlers that have already been visited. Then any tags that are that list will not be traversed a second time. These extra precautionary steps make the intended macro more intensive to write. Another approach would be to trace down a particular path way (top down). Possibly the code in the TOC can already do this. Then save all the paths that are created. Then list over the paths, reversing them, and selecting only the ones that match your branch at the bottom. I've actually never used this approach, so it's a bit more speculative. Perhaps, more importantly, might be to understand why you want the reverse tree. Sometimes understanding why something is wanted yields simpler solutions. On Saturday, March 28, 2020 at 6:07:55 PM UTC-7, Damon Pritchett wrote: > > Hey all, > > Hope everyone is having a safe and healthy weekend. > > I would like to use the list widget and/or macro to do a tag trace on a > specific set of tiddlers. In essence, it would be kind of a like a reverse > table of contents. I've tried to do this myself, but am really not sure > where to start especially since this would be recursive. Let me illustrate > what I'd like. > > Suppose I have a set of tiddlers that are tagged thusly: > > * Tiddler A is tagged with Root > * Tiddler B is tagged with Tiddler A > * Tiddler C is tagged with Tiddler A > * Tiddler D is tagged with Tiddler B > * Tiddler E is tagged with Tiddler D > > In Tiddler E, I would like to display something like this: > > Tiddler E -> Tiddler D -> Tiddler B -> Tiddler A -> Root > > Tiddler C would show Tiddler C -> Tiddler A -> Root > > How would I go about doing this? > > Many thanks, > > Damon > -- You received this message because you are subscribed to the Google Groups "TiddlyWiki" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/tiddlywiki/29cb7219-00e6-4565-a7a7-a78dcee14fe1%40googlegroups.com.
