feat: Add a new and improved syntax tree view

[Giga-Bowser]

Lots of cool features!

• Reveal button to highlight a given syntax element
• Tree selection matches document selection
• Hover to see an element's text
• Supports trees for rust code in string literals

I'm still pretty new to the VS Code side of things so there's probably a better way to do some of the stuff I did. If someone more familiar with this sort of thing wants to try to record a GIF or something of this in use, feel free. Otherwise I'll try to get one up in a bit,

[Giga-Bowser]

Also, would people be fine with this replacing the old textual syntax tree view? I could try to move some of the functionality to integrate with this feature if it's still desired. Maybe an action on each syntax element to copy the old format view to the clipboard?

[Veykril]

If it does allow debugging the syntax tree then there is no need for the old view

[Giga-Bowser]

Here's a video of it in action

syntaxtree.mp4

[lnicola]

Maybe an action on each syntax element to copy the old format view to the clipboard?

I think so, copying is still useful, e.g. when pasting to GitHub.

[Giga-Bowser]

Done!

[Veykril]

Couple things but otherwise this seems good to me!

[lnicola]

I guess we can't put a "Copy" icon next to 🔍, can we?

[Giga-Bowser]

I guess we can't put a "Copy" icon next to 🔍, can we?

We can! Should be fixed.

[Veykril]

Thanks!

[lnicola]

I'm playing with this, is there a difference between these two? 😅

[Giga-Bowser]

I actually have no clue. VS Code registers both of these commands for us so I'm not sure why there's two, I'll take a look.

[Giga-Bowser]

It seems like since we're registering a custom view container, View: Show Rust Syntax Tree shows that container, while Rust Syntax Tree: Focus on Rust Syntax Tree View focuses on the tree view within said container. You can see the same thing with builtin views, for example, View: Show Explorer and Explorer: Focus on Folders View.

[lnicola]

Ah, you're right, never mind.