extend syntax for filter expressions

[jayfresh]

To extend the filter syntax for expressions used in methods such as TiddlyWiki.prototype.filterTiddlers(filter). The need is to be able to filter for tiddlers that are not tagged with a particular tag.

Suggested syntax: [tag[!bad tag]]

Overview of existing filter syntax here:  http://tiddlywiki.org/index.php?title=Dev:FilterTiddlers

[jayfresh]

Patch

[JeremyRuston]

Preferred syntax for this is:

[tag[blah]] is equivalent to [+tag[blah]] [-tag[blah]] removes any tiddlers with the given tag from the accumulated list

[jayfresh]

Second patch for 454

[jayfresh]

Altered contribution to enhance FilterTiddlers? with to support nested filter syntax. Architecture changed to use two stacks.

[jayfresh]

Unit testing ahoy!

[jayfresh]

4th patch to ticket 454

[jayfresh]

4th patch tested here:  http://jonny.jonathan.googlepages.com/filterTiddlersTesting.html

(Go to the "Run the tests" tiddler)

[jayfresh]

Revised to take the form of a plugin. Code here:  http://svn.tiddlywiki.org/Trunk/contributors/JonathanLister/plugins/filterTiddlersPlugin.js

The testing framework for this is here:  http://jnthnlstr.googlepages.com/testFilterTiddlersPlugin.html

[MartinBudden]

Milestone 2.6.2 deleted

[cdent]

As I recall, Jon's syntax was not well liked. In fact it was considered overly vebose and hard to parse.

Also, since it has been around for 3 years and we are getting by without it...

[EricShulman]

Replying to cdent:

As I recall, Jon's syntax was not well liked. In fact it was considered overly vebose and hard to parse. Also, since it has been around for 3 years and we are getting by without it...

See also

 http://www.TiddlyTools.com/#MatchTagsPlugin

which adds *full Boolean expression handling* to the tag filter syntax, including AND/OR/NOT with nested parentheses as needed. Thus:

[tag[NOT badtag]]
[tag[sometag AND NOT badtag]]
[tag[sometag OR (someothertag AND NOT badtag)]]
etc.