Add MoveUp command to VimMode

src/atom/editor.coffee

@@ -66,3 +66,6 @@ class Editor extends Template
 
     moveLeft: ->
       @aceEditor.navigateLeft()
+
+    moveUp: ->
+      @aceEditor.navigateUp()

src/atom/vim-mode-operators.coffee

@@ -29,3 +29,11 @@ module.exports =
       editor.moveLeft() if column > 0
 
     isComplete: -> true
+
+  MoveUp: class
+    execute: (editor) ->
+      {column, row} = editor.getCursor()
+      editor.moveUp() if row > 0
+
+    isComplete: -> true
+

src/atom/vim-mode.coffee

@@ -1,6 +1,6 @@
 _ = require 'underscore'
 $ = require 'jquery'
-{ NumericPrefix, DeleteChar, MoveLeft } = require 'vim-mode-operators'
+{ NumericPrefix, DeleteChar, MoveLeft, MoveUp} = require 'vim-mode-operators'
 
 module.exports =
 class VimMode
@@ -17,9 +17,13 @@ class VimMode
 
     @editor.on 'insert-mode:activate', => @activateInsertMode()
     @editor.on 'command-mode:activate', => @activateCommandMode()
-    @editor.on 'command-mode:delete-char', => @deleteChar()
-    @editor.on 'command-mode:numeric-prefix', (e) => @numericPrefix(e)
+    @editor.on 'command-mode:delete-char', => @pushOperator(new DeleteChar)
+    @editor.on 'command-mode:numeric-prefix', (e) => @pushOperator(new NumericPrefix(e.keyEvent.char))
     @editor.on 'command-mode:move-left', => @pushOperator(new MoveLeft)
+    @editor.on 'command-mode:move-up', => @pushOperator(new MoveUp)
+
+  registerCommand: (name, handler) ->
+    @editor.on "command-mode:#{name}", handler
 
   activateInsertMode: ->
     @editor.removeClass('command-mode')
@@ -29,17 +33,12 @@ class VimMode
     @editor.removeClass('insert-mode')
     @editor.addClass('command-mode')
 
-  deleteChar: ->
-    @pushOperator(new DeleteChar)
-
-  numericPrefix: (e) ->
-    @pushOperator(new NumericPrefix(e.keyEvent.char))
-
   commandModeBindings: ->
     bindings =
       'i': 'insert-mode:activate'
       'x': 'command-mode:delete-char'
       'h': 'command-mode:move-left'
+      'j': 'command-mode:move-up'
     for i in [0..9]
       bindings[i] = 'command-mode:numeric-prefix'
     bindings