A way of switching to the hover doc window immediately after it appears

[Shaobin-Jiang]

I seem to recall that people have suggested that <C-w>w would do the trick, switching to the hover doc. However, it does not always work. If you have a vertical split and open the hover doc in the left window, <C-w>w brings you to the window on the right instead of the hover doc.

Instead of using that keybinding, doing something like below would open the hover doc and move the cursor directly into it.

function hover_doc()
    local win = require "lspsaga.window"
    local old_new_float = win.new_float
    win.new_float = function(self, float_opt, enter, force)
        local window = old_new_float(self, float_opt, enter, force)
        local _, winid = window:wininfo()
        vim.api.nvim_set_current_win(winid)

        win.new_float = old_new_float
        return window
    end

    vim.cmd "Lspsaga hover_doc"
end

I initially started out by calling require("lspsaga.hover").winid right after calling the Lspsaga command, but the value is nil and I could only get a valid winid by using vim.defer_fn to acquire it after about 100ms. This new approach seems more secure and efficient.