ModalSelector takes a callback, not an Array

extensions/filefinder/filefinder.coffee

@@ -11,7 +11,7 @@ class Filefinder extends Extension
     atom.on 'project:open', @startup
 
   startup: (@project) =>
-    @pane = new ModalSelector _.reject @project.allURLs(), ({url}) ->
+    @pane = new ModalSelector => _.reject @project.allURLs(), ({url}) ->
       fs.isDirectory url
 
   toggle: ->

extensions/gemfile/gemfile.coffee

@@ -24,7 +24,7 @@ class Gemfile extends Extension
       ]
       gems = @gems url
       @project.settings.extraURLs["http://rubygems.org/"] = gems
-      @pane = new ModalSelector gems
+      @pane = new ModalSelector -> gems
 
   toggle: ->
     @pane?.toggle()

src/atom/modal-selector.coffee

@@ -19,10 +19,11 @@ class ModalSelector extends Modal
 
   showing: false
 
-  # The items to filter. An Array of {name:name, url:url} objects.
-  list: []
+  # A callback which should return the items to filter.
+  # Return should be an Array of {name, url} objects.
+  filterCallback: -> []
 
-  constructor: (@list) ->
+  constructor: (@filterCallback) ->
     super @selectorHTML
 
     head  = $('head')[0]
@@ -47,6 +48,7 @@ class ModalSelector extends Modal
 
   show: ->
     super
+    @list = @filterCallback()
     @filter()
     $('#modal-selector input').live 'keydown.modal-selector', @onKeydown