Make Pane handle split commands instead of Editor

src/app/editor.coffee

@@ -172,10 +172,6 @@ class Editor extends View
         'editor:fold-current-row': @foldCurrentRow
         'editor:unfold-current-row': @unfoldCurrentRow
         'editor:fold-selection': @foldSelection
-        'editor:split-left': @splitLeft
-        'editor:split-right': @splitRight
-        'editor:split-up': @splitUp
-        'editor:split-down': @splitDown
         'editor:show-next-buffer': @loadNextEditSession
         'editor:show-buffer-1': => @setActiveEditSessionIndex(0) if @editSessions[0]
         'editor:show-buffer-2': => @setActiveEditSessionIndex(1) if @editSessions[1]
@@ -789,20 +785,17 @@ class Editor extends View
     @updateLayerDimensions()
     @requestDisplayUpdate()
 
-  newSplitEditor: (editSession) ->
-    new Editor { editSession: editSession ? @activeEditSession.copy() }
-
   splitLeft: (editSession) ->
-    @pane()?.splitLeft(@newSplitEditor(editSession)).currentItem
+    @pane()?.splitLeft()
 
   splitRight: (editSession) ->
-    @pane()?.splitRight(@newSplitEditor(editSession)).currentItem
+    @pane()?.splitRight()
 
   splitUp: (editSession) ->
-    @pane()?.splitUp(@newSplitEditor(editSession)).currentItem
+    @pane()?.splitUp()
 
   splitDown: (editSession) ->
-    @pane()?.splitDown(@newSplitEditor(editSession)).currentItem
+    @pane()?.splitDown()
 
   pane: ->
     @closest('.pane').view()

src/app/keymaps/atom.cson

@@ -30,6 +30,12 @@
   'ctrl-tab': 'window:focus-next-pane'
   'ctrl-meta-f': 'window:toggle-full-screen'
 
+'.pane':
+  'ctrl-|': 'pane:split-right'
+  'ctrl-w v': 'pane:split-right'
+  'ctrl--': 'pane:split-down'
+  'ctrl-w s': 'pane:split-down'
+
 '.tool-panel':
   'meta-escape': 'tool-panel:unfocus'
   'escape': 'core:close'

src/app/keymaps/editor.cson

@@ -15,10 +15,6 @@
   'ctrl-{': 'editor:fold-all'
   'ctrl-}': 'editor:unfold-all'
   'alt-meta-ctrl-f': 'editor:fold-selection'
-  'ctrl-|': 'editor:split-right'
-  'ctrl-w v': 'editor:split-right'
-  'ctrl--': 'editor:split-down'
-  'ctrl-w s': 'editor:split-down'
   'shift-tab': 'editor:outdent-selected-rows'
   'meta-[': 'editor:outdent-selected-rows'
   'meta-]': 'editor:indent-selected-rows'

src/app/pane.coffee

@@ -22,6 +22,10 @@ class Pane extends View
 
     @command 'pane:show-next-item', @showNextItem
     @command 'pane:show-previous-item', @showPreviousItem
+    @command 'pane:split-left', => @splitLeft()
+    @command 'pane:split-right', => @splitRight()
+    @command 'pane:split-up', => @splitUp()
+    @command 'pane:split-down', => @splitDown()
     @on 'focus', => @viewForCurrentItem().focus()
 
   getItems: ->