Move EditorCommand helpers elsewhere

RootView and Editor now have helpers that support
binding events to callbacks, binding a callback to
all current and future editors, and replacing the
selected text via a transforming callback.

src/app/editor.coffee

@@ -965,3 +965,20 @@ class Editor extends View
     @find('pre.line.cursor-line').removeClass('cursor-line')
     if @getSelection().isSingleScreenLine()
       @find("pre.line:eq(#{screenRow})").addClass('cursor-line')
+
+  bindToKeyedEvent: (key, event, callback) ->
+    binding = {}
+    binding[key] = event
+    window.keymap.bindKeys '.editor', binding
+    @on event, =>
+      callback(this, event)
+
+  replaceSelectedText: (replaceFn) ->
+    selection = @getSelection()
+    return false if selection.isEmpty()
+
+    text = replaceFn(@getTextInRange(selection.getBufferRange()))
+    return false if text is null or text is undefined
+
+    @insertText(text, select: true)
+    true

src/app/root-view.coffee

@@ -232,3 +232,10 @@ class RootView extends View
 
   saveAll: ->
     editor.save() for editor in @getEditors()
+
+  eachEditor: (callback) ->
+    for editor in @getEditors()
+      callback(editor)
+
+    @on 'editor-open', (e, editor) ->
+      callback(editor)

src/extensions/editor-command.coffee

@@ -1,26 +0,0 @@
-module.exports =
-class EditorCommand
-
-  @activate: (rootView) ->
-    for editor in rootView.getEditors()
-      @onEditor(editor)
-
-    rootView.on 'editor-open', (e, editor) =>
-      @onEditor(editor)
-
-  @register: (editor, key, event, callback) ->
-    binding = {}
-    binding[key] = event
-    window.keymap.bindKeys '.editor', binding
-    editor.on event, =>
-      callback(editor, event)
-
-  @replaceSelectedText: (editor, replace) ->
-     selection = editor.getSelection()
-     return false if selection.isEmpty()
-
-     text = replace(editor.getTextInRange(selection.getBufferRange()))
-     return false if text is null or text is undefined
-
-     editor.insertText(text, select: true)
-     true

src/extensions/lowercase-command.coffee

@@ -1,9 +1,10 @@
-EditorCommand = require 'editor-command'
-
 module.exports =
-class LowerCaseCommand extends EditorCommand
+class LowerCaseCommand
+
+  @activate: (rootView) ->
+    rootView.eachEditor(@onEditor)
 
   @onEditor: (editor) ->
-    @register editor, 'meta-Y', 'lowercase', =>
-      @replaceSelectedText editor, (text) ->
+    editor.bindToKeyedEvent 'meta-Y', 'lowercase', =>
+      editor.replaceSelectedText (text) ->
         text.toLowerCase()

src/extensions/uppercase-command.coffee

@@ -1,9 +1,10 @@
-EditorCommand = require 'editor-command'
-
 module.exports =
-class UpperCaseCommand extends EditorCommand
+class UpperCaseCommand
+
+  @activate: (rootView) ->
+    rootView.eachEditor(@onEditor)
 
   @onEditor: (editor) ->
-    @register editor, 'meta-X', 'uppercase', =>
-      @replaceSelectedText editor, (text) ->
+    editor.bindToKeyedEvent 'meta-X', 'uppercase', =>
+      editor.replaceSelectedText (text) ->
         text.toUpperCase()