Help with context widget

#1

Hello,

Danielo515 has introduced a useful widget (context.js*) which looks for a word inside a tiddler and shows the result with the searched word highlighted with some of its context.

It extract before characters before the word and after afterwards. (before and after are parameters).

I would rather have the widget to extract the context before up to the beginning of the line containing the word instead of a fixed number of characters.

I think that this should be possible with a modification in the following regexp.

var regString = "(\\w+[\\s\\S]{0,#before#})?(#term#)([\\s\\S]{0,#after#}\\w+)?";

However, I was not able to have something work (trying several things such as (\\n[\\s\\S]*)?(#term#)([\\s\\S]{0,#after#}\\w+)?";)

Any idea to make it work?

BR,

Eskha

*Context Plugin — search with context

#2

Have you tried ^.*#term#.{0,#after#} ? Don’t forget the multiline flag (m) for the regex too.

In the infinite wisdom of GigantiCorps, I can’t see the tiddlyspot site with that plugin, so I don’t know exactly how this is built. But in pure JS, I might do something like this:

const makeContextRegex = (term, after) =>
  new RegExp(`^.*${term}.{0,${after}}`, `gm`)
    // you might want `gim` instead for case-insensitive

const str = 
`We won't get fooled again!
Nothing to see here but barbarian bazookas.
Come, Watson! The Game is Afoot!
I took him for a kind of buffoon. Now I see he is a devil.

  (this space intentionally left blank)

Wait, but it wasn't actually blank!

A foolish consistency is the hobgoblin of little minds, adored by little statesmen and philosophers and divines
`

const regex = makeContextRegex('foo', 20)

str.match(regex) //=> 
// [
//     "We won't get fooled again!", 
//     "Come, Watson! The Game is Afoot!", 
//     "I took him for a kind of buffoon. Now I see he is a",
//     "A foolish consistency is "
// ]
#3

Thank you Scott.
Your solution is working fine.

BR,

Eskha

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