Allow finding symbols in the current document about lsp-ivy

[Lythenas]

@nbfalcon Did you manage to implement this? For me the imenu is not very good to use.

[sebastiansturm]

not sure how far this overlaps with the imenu functionality already provided by lsp-mode, but I guess I could just add an optional prefix parameter that will be used to match against returned filenames; that way you could restrict your search to a specific directory, or file, such as the file being visited by the current buffer

[nbfalcon]

Actually, imenu might be good enough. I was thinking more of "textDocument/documentSymbols" wrapped in ivy-read. I tried implementing that, but failed.

[nbfalcon]

Okay, on second thought this would duplicate the functionality of imenu, which does exactly what I want. I'm closing this.

[nbfalcon]

VSCode has a feature to specifically search for DocumentSymbols, and we should also have that. I'm reopening because I'm almost done implementing this.

[razzmatazz]

same for me.. imenu integration in lsp appears to cut symbol description up to certain length..

an example:

thinking about implementing lsp-ivy-document-symbol in lsp-ivy.el unless I find a way to make lsp-mode not truncate imenu items..

[razzmatazz]

oh, found imenu-max-item-length, so truncation is not a problem for now