working title

lib/ex-view-model.coffee

@@ -0,0 +1,35 @@
+{ViewModel, Input} = require './view-model'
+
+module.exports =
+class ExViewModel extends ViewModel
+  constructor: (@exCommand) ->
+    super(@exCommand, class: 'command')
+    @historyIndex = -1
+
+    @view.editor.on('core:move-up', @increaseHistoryEx)
+    @view.editor.on('core:move-down', @decreaseHistoryEx)
+
+  restoreHistory: (index) ->
+    @view.editor.setText(@history(index).value)
+
+  history: (index) ->
+    @exState.getExHistoryItem(index)
+
+  increaseHistoryEx: =>
+    if @history(@historyIndex + 1)?
+      @historyIndex += 1
+      @restoreHistory(@historyIndex)
+
+  decreaseHistoryEx: =>
+    if @historyIndex <= 0
+      # get us back to a clean slate
+      @historyIndex = -1
+      @view.editor.setText('')
+    else
+      @historyIndex -= 1
+      @restoreHistory(@historyIndex)
+
+  confirm: (view) =>
+    @value = @view.value
+    @exState.pushExHistory(@)
+    super(view)