help.txt commands.txt                                       


Commands are activated by typing ":" in normal mode. If for example a file is 
open, it can be saved by typing :w. To quit Liquid type :q or :q! to force 
quit, discarding changes.

Modify commands

In this section there is a simple example on how to create a command that acts
on a buffer.

The steps are:

1. Load relevant namespaces
2. Create a function that takes a buffer and evaluates to a buffer.
   This function sort of "encapsulates" the change.
3. Register the function as a "colon" command 

Just type "c p p" in each form below to live-update Liquid with the new

    (ns user
      (:require [liq.editor :as editor]
                [liq.buffer :as buffer]))

    (defn move10
      (buffer/right buf 10))

    (defn move10action
      (editor/apply-to-buffer move10))

    (editor/set-command :move10 move10action)


    (swap! editor/state assoc-in [:liq.editor/commands :move10] move10action)

Now type :move10 in normal mode. Then ENTER. The cursor will move 10 times to 
the right 

The command can also be used for keybinding, like this:

    (editor/add-key-bindings :help-mode :normal {"C-t" :move10})

The (editor/apply-to-buffer ...) function takes a buffer -> buffer function
and converts it to a 0-arity function (action) that applies the function on
a given buffer or the current active buffer.

Example with command taking parameters:

    (ns user
      (:require [liq.editor :as editor]
                [liq.buffer :as buffer]))

    (defn move-n
      [buf n]
      (buffer/right buf n))

    (defn move-n-action
      [& args]
      (let [n (Integer/parseInt (or (first args) "10"))]
        (editor/apply-to-buffer #(move-n % n))))

    (swap! editor/state assoc-in [:liq.editor/commands :moven] move-n-action)

Try it by typing ":moven 20" in normal mode