Feature Request: Colored line scopes

[hediet]

Now that bracket pair colorization landed, we can do more advanced stuff like this:

(Idea by @CoenraadS)

[hediet]

Also see #130379 for a related feature.

[CoenraadS]

I will include this screenshot also, as it shows more 'smart' behavior that would be nice to have.

This is a more general smart indent line feature, and not actually related to the coloring though. Just putting it out there. I believe it is one of the reasons my extension so popular. I even got emails from teachers about how much it helped their students.

[Stanzilla]

Any plans to also add the "consecutive/independent color mode" and "force unique opening color" settings?

[hediet]

@Stanzilla please open a separate issue for these two features!
In these feature requests, please provide examples that demonstrate the usefulness of the feature.

[Stanzilla]

Done!

#131027
#131029

[byehack]

Any plans to also add the "show Brackets In Ruler" settings?

it's really usefull when brackets are so long. we can see first/end of bracket in ruller with specified color in lef/middle/right of ruler.

[hediet]

@byehack please file an issue request!

[hediet]

Maybe this feature could even be implemented in an extension if some version of #131062 (comment) lands:
On every cursor change, query all brackets pairs that intersect with the cursor position and create these line decorations for the inner-most bracket pair.

---

Also, I think it might make sense to only show these colored line scopes when the distance of opening/closing bracket is less than 500 lines apart (it is very cheap to compute the distance).
In this case, you can quickly iterate over all lines in between, find the smallest indentation and setup all decorations.

For a performant implementation that spans thousands of lines, you should not walk all lines in between on every cursor move operation. In this case, the tree data structure needs to be extended so that you can cheaply compute the smallest indentation in logarithmic time.
However, this probably will prevent reusing text nodes.
Also, you would need to compute the line decorations on demand for the current viewport.