Java: Get documentation in preview window

[mb720]

Hi and thanks a lot for Coq!

I'm trying to display Java documentation when in in Coq's autocompletion. I'm using nvim-jdtls to connect to the LSP server.

While in autocompletion, I get signature information but no documentation:

Mind that documentation is available using hover:

What I'd like to have is this, either automatically or when pressing a key combination while in Coq's autocompletion:

---

This is my init.lua:

-- Default is "~/.config/nvim/", can be changed with $XDG_CONFIG_HOME or NVIM_APPNAME
local config_dir = vim.fn.stdpath("config")

local vim_plug_file = config_dir .. "/autoload/plug.vim"

function file_exists(name)
  local f = io.open(name, "r")
  return f ~= nil and io.close(f)
end

-- Install vim-plug if it doesn't exist
if not file_exists(vim_plug_file) then
    local vim_plug_url = "https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim"
    vim.fn.system({ "curl", "-fLo", vim_plug_file, "--create-dirs", vim_plug_url })

    vim.api.nvim_create_autocmd("VimEnter", {
        callback = function()
            vim.cmd("PlugInstall")
        end,
    })
end

local vim = vim
local Plug = vim.fn['plug#']
vim.call('plug#begin')
Plug('https://github.com/mfussenegger/nvim-jdtls')
Plug('https://github.com/ms-jpq/coq_nvim')
vim.call('plug#end')

This is ftplugin/java.lua:

local jdtls = require('jdtls')

local coq = require('coq')

local config = {
  cmd = {'/usr/bin/jdtls'},
  root_dir = vim.fs.dirname(vim.fs.find({'gradlew', '.git', 'mvnw', "README.md"}, { upward = true })[1]),
  capabilities = coq.lsp_ensure_capabilities(),
  settings = {
    java = {
      signatureHelp = {enabled = true}, contentProvider = {preferred = 'fernflower'},
      }
    }
}

jdtls.start_or_attach(config)