Structured movements

[losnappas]

Bringing up this idea from emacs' symex plugin. Essentially, any language with tree sitter can have navigation based on structures. E.g. k might select the next sibling in the structure.

There's already a couple of tree sitter movements alt-i/o in helix, I'm wondering why there isn't a good bunch more. I didn't bother checking if I could already make a keymap like this, but if anybody has then please share!

With tree sitter, there's also the opportunity to do simple refactors like "raise form" to lift something out of an if statement.

These will probably work good as a plugin, once the time comes. I hope plugins will have access to tree sitter structures and LSP.

[hamrik]

Use can use unimparied mode to jump between TS nodes and Alt-i/o to expand/shrink their selection.

[losnappas]

That's a start. What I'd also imagine useful is simple refactors like slurp (familiar from working with lisps) working in any tree-sitter supported lang.

E.g.

if something: # if this block is selected and you "slurp", then print(2) moves into the if statement
  print(1)
print(2)

# post-slurp:
if something:
  print(1)
  print(2)

I think this should be possible.

[valpackett]

Ki editor is out there now prioritizing tree-sitter based structured editing. Deleting/duplicating/reordering syntax nodes is VERY cool, I really want Helix to be able to do that.