feature request: ability to collapse scoped kind groups

[weirdan]

Currently kind groups (like functions, variables, etc) are collapsible for unscoped tags, but scoped kind groups (like class member variables or methods) cannot be collapsed. Good example is PHP: using UCtags (that report scopes), since #430, it's not possible to collapse class vars section, but using Exuberant Ctags (that does not report scopes) file vars group is collapsible.

[majutsushi]

That would certainly be useful. I'll see what I can do.

[antoinemadec]

@majutsushi , would it still be possible to add this feature?

I use SystemVerirlog on a daily basis and HW engineers tend to like gigantic files. Being able to fold kinds inside a scope would be a tremendous help for me.

I will try to look at the code to see if I can create a PR, but I doubt it.

[majutsushi]

It should certainly be possible but I think it would be non-trivial. At the moment the tags are stored internally in a tree structure based on their scope, i.e. each tree node is a tag and a node with children means that the children are within the scope of the parent tag/node. Then the display code essentially just turns this tree structure into the indented visualization you see.

So in order to make additional things foldable you would have to add a different kind of node to the tree and adjust the display code accordingly, in a way that makes it possible to ignore this nesting for people that don't really want this additional indentation.