[WIP] #21: highlight code blocks

[timmhirsens]

Beginning working on highlighting code blocks.

This will close #21

There are some 'edge' cases that currently are unsupported:

  def call(%Plug.Conn{} = conn, []),
    do: conn # <- do: on next line after def

  def clear_session(conn) do
    put_session(conn, fn(_existing) -> Map.new end) # end on same line as fn ->
  end

def code(integer_or_atom) # function declaration w/o body

  def call(conn, level) do
    Logger.log level, fn ->
      [conn.method, ?\s, conn.request_path]
    end

    start = current_time()

    Conn.register_before_send(conn, fn conn ->
      Logger.log level, fn ->
        stop = current_time()
        diff = time_diff(start, stop)

        [connection_type(conn), ?\s, Integer.to_string(conn.status),
         " in ", formatted_diff(diff)]
      end
      conn
    end) # <- 'end' with trailing ')'
  end

In my simple phoenix application it does work pretty well at the moment.
But I think before releasing this, those edge cases should be handled.

[konradkalita]

@fr1zle Hi, are you still interested in this feature? I could solve these edge cases for you.

[timmhirsens]

Sure, feel free to pickup from here or open up a new PR

[konradkalita]

I digged into it and I conclude that to do it well I need an elixir parser or at least a lexer. Unfortunately number of constructs like many kind of strings, comments, sigils, atoms which I should exclude to find proper keyword is to big. Do you know if I can get a parse tree/ast with position annotations from Elixir Sense?