Allow bindings for hover actions

[expipiplus1]

Feature description

Is it possible to add support for automatically executing the hover actions in a hover meny (for example to have a keybinding to open source or documentation in browser)?

(It's definitely possible with send_keys or whatever KK/Open documentation in browser<CR><CR>, but hardly elegant)

[mrcjkb]

Hey 👋

Sure, I could probably add some <Plug> mappings.
I'll look into it when I have some time.

[expipiplus1]

here's what I'm using, I updated it to support Source and Documentation, and also go to definition if it's available instead

It makes a great gd mapping

local function open_lsp_browser_link(link_type)
  -- First, try to go to definition
  local definition_found = false
  vim.lsp.buf.definition {
    on_list = function()
      definition_found = true
      vim.lsp.buf.definition()
    end,
  }

  -- We can get here before the on_list function is called which is
  -- because I don't know how to run the definition call synchronously, just
  -- check this variable again a bit later :shrug:

  local function make_hover_request(retry)
    -- If definition is found, we're done
    if definition_found then return end

    -- If no definition, proceed with hover request
    local params = vim.lsp.util.make_position_params()
    vim.lsp.buf_request(0, "textDocument/hover", params, function(err, result, _, _)
      if err or not result or not result.contents then
        if not retry then print "No hover information available" end
        return
      end

      local markdown_lines = vim.lsp.util.convert_input_to_markdown_lines(result.contents)
      local uri

      for _, line in ipairs(markdown_lines) do
        if vim.startswith(line, "[" .. link_type .. "]") then
          uri = string.match(line, "%[" .. link_type .. "%]%((.+)%)")
          if uri then
            if uri then
              local OS = require "haskell-tools.os"
              OS.open_browser(uri)
              print("Opening " .. link_type .. " in browser")
            end
            return
          end
        end
      end

      if not retry then
        -- If we didn't find the link, try once more
        vim.defer_fn(function() make_hover_request(true) end, 100)
      else
        print("Could not find " .. link_type .. " link")
      end
    end)
  end
  make_hover_request(false)
end