WIP: Split panes can be closed with meta-w

Still some issues… view gets screwed up after closing panes in certain layout arrangements.

spec/atom/root-view-spec.coffee

@@ -198,14 +198,39 @@ describe "RootView", ->
         expect(editor5.position().top).toBe editor4.outerHeight()
         expect(editor5.outerHeight()).toBe Math.floor(1/3 * rootView.height())
 
+    describe "when close is triggered on an editor pane", ->
+      it "adjusts the layout, focuses the next most-recently active editor, and closes the window when there are no remaining editors", ->
+        spyOn(window, 'close')
+        editor = rootView.find('.editor').view()
+        editor.trigger 'split-right'
+        editor.trigger 'split-right'
+        editor.trigger 'split-right'
 
+        [editor1, editor2, editor3, editor4] = rootView.find('.editor').map -> $(this).view()
 
+        editor2.focus()
+        editor1.focus()
+        editor3.focus()
+        editor4.focus()
 
+        editor4.trigger 'close'
+        expect(editor3.isFocused).toBeTruthy()
+        expect(editor1.outerWidth()).toBe Math.floor(rootView.width() / 3)
+        expect(editor2.outerWidth()).toBe Math.floor(rootView.width() / 3)
+        expect(editor3.outerWidth()).toBe Math.floor(rootView.width() / 3)
 
+        editor3.trigger 'close'
+        expect(editor1.isFocused).toBeTruthy()
+        expect(editor1.outerWidth()).toBe Math.floor(rootView.width() / 2)
+        expect(editor2.outerWidth()).toBe Math.floor(rootView.width() / 2)
 
+        editor1.trigger 'close'
+        expect(editor2.isFocused).toBeTruthy()
+        expect(editor2.outerWidth()).toBe Math.floor(rootView.width())
 
-
-
+        expect(window.close).not.toHaveBeenCalled()
+        editor2.trigger 'close'
+        expect(window.close).toHaveBeenCalled()
 
   describe ".addPane(view)", ->
     it "adds the given view to the rootView (at the bottom by default)", ->

src/atom/editor.coffee

@@ -99,6 +99,7 @@ class Editor extends View
     @on 'split-right', => @splitRight()
     @on 'split-up', => @splitUp()
     @on 'split-down', => @splitDown()
+    @on 'close', => @remove(); false
 
   buildCursorAndSelection: ->
     @cursor = new Cursor(this)
@@ -113,6 +114,7 @@ class Editor extends View
       false
 
     @hiddenInput.on 'focus', =>
+      @rootView()?.editorFocused(this)
       @isFocused = true
       @addClass 'focused'
 
@@ -157,6 +159,9 @@ class Editor extends View
       @setMaxLineLength() if @softWrap
       @focus()
 
+  rootView: ->
+    @parents('#root-view').view()
+
   selectTextOnMouseMovement: ->
     moveHandler = (e) => @selectToScreenPosition(@screenPositionFromMouseEvent(e))
     @on 'mousemove', moveHandler
@@ -440,8 +445,11 @@ class Editor extends View
     @parents('#root-view').view().adjustSplitPanes()
 
   remove: (selector, keepData) ->
-    @unsubscribeFromBuffer() unless keepData
+    return super if keepData
+    @unsubscribeFromBuffer()
+    rootView = @rootView()
     super
+    rootView?.editorRemoved(this)
 
   unsubscribeFromBuffer: ->
     @buffer.off ".editor#{@id}"

src/atom/root-view.coffee

@@ -15,7 +15,10 @@ class RootView extends View
     @div id: 'root-view', =>
       @subview 'editor', new Editor
 
+  editors: null
+
   initialize: ({url}) ->
+    @editors = []
     @editor.keyEventHandler = window.keymap
     @createProject(url)
 
@@ -36,10 +39,24 @@ class RootView extends View
   addPane: (view) ->
     @append(view)
 
+  editorFocused: (editor) ->
+    _.remove(@editors, editor)
+    @editors.push(editor)
+
+  editorRemoved: (editor) ->
+    _.remove(@editors, editor)
+    @adjustSplitPanes()
+    if @editors.length
+      @focusLastActiveEditor()
+    else
+      window.close()
+
+  focusLastActiveEditor: ->
+    _.last(@editors).focus()
+
   adjustSplitPanes: (element = @children(':first'))->
     if element.hasClass('row')
       totalUnits = @horizontalGridUnits(element)
-      console.log totalUnits
       unitsSoFar = 0
       for child in element.children()
         child = $(child)
@@ -54,7 +71,6 @@ class RootView extends View
 
     else if element.hasClass('column')
       totalUnits = @verticalGridUnits(element)
-      console.log "total vertical", totalUnits
       unitsSoFar = 0
       for child in element.children()
         child = $(child)

src/stdlib/underscore-extensions.coffee

@@ -2,7 +2,8 @@ _ = require 'underscore'
 
 _.mixin
   remove: (array, element) ->
-    array.splice(array.indexOf(element), 1)
+    index = array.indexOf(element)
+    array.splice(index, 1) if index >= 0
 
   sum: (array) ->
     sum = 0