Autocompletion per document or for the whole workspace

[renkun-ken]

The current implementation of symbol provider is workspace-wide, i.e., if you open and edit 10 R script files, then all documents are parsed and all symbols are shared in the completion list when I edit one file.

This can sometimes be annoying if I need to edit a simple script and a very long script that defines a lot of symbols at the same time.

I'm wondering if it makes sense to provide symbols per document, or according to referenced documents (as mentioned in #20).

[randy3k]

I guess we will need to check if the files are coming from the same package. Files from the same package should share the symbol completions. We may need to open a workspace for each independent file.

[renkun-ken]

Global namespace no longer infinitely grows with #123 merged. So the behavior is good enough for now.