Install the LineFolder into the editor

LineWrapper now takes a LineFolder instead of a Highlighter. It's a
cascade of processing steps.

spec/atom/line-wrapper-spec.coffee

@@ -1,6 +1,7 @@
-Buffer = require 'buffer'
 LineWrapper = require 'line-wrapper'
+Buffer = require 'buffer'
 Highlighter = require 'highlighter'
+LineFolder = require 'line-folder'
 Range = require 'range'
 ScreenLineFragment = require 'screen-line-fragment'
 _ = require 'underscore'
@@ -10,7 +11,9 @@ describe "LineWrapper", ->
 
   beforeEach ->
     buffer = new Buffer(require.resolve('fixtures/sample.js'))
-    wrapper = new LineWrapper(50, new Highlighter(buffer))
+    highlighter = new Highlighter(buffer)
+    folder = new LineFolder(highlighter)
+    wrapper = new LineWrapper(50, folder)
     changeHandler = jasmine.createSpy('changeHandler')
     wrapper.on 'change', changeHandler
 

src/atom/editor.coffee

@@ -4,6 +4,7 @@ Point = require 'point'
 Cursor = require 'cursor'
 Selection = require 'selection'
 Highlighter = require 'highlighter'
+LineFolder = require 'line-folder'
 LineWrapper = require 'line-wrapper'
 UndoManager = require 'undo-manager'
 Range = require 'range'
@@ -134,7 +135,8 @@ class Editor extends View
 
   setBuffer: (@buffer) ->
     @highlighter = new Highlighter(@buffer)
-    @lineWrapper = new LineWrapper(Infinity, @highlighter)
+    @lineFolder = new LineFolder(@highlighter)
+    @lineWrapper = new LineWrapper(Infinity, @lineFolder)
     @undoManager = new UndoManager(@buffer)
     @renderLines()
     @setCursorPosition(row: 0, column: 0)

src/atom/line-wrapper.coffee

@@ -6,9 +6,9 @@ Range = require 'range'
 
 module.exports =
 class LineWrapper
-  constructor: (@maxLength, @highlighter) ->
+  constructor: (@maxLength, @lineFolder) ->
     @buildLineMap()
-    @highlighter.on 'change', (e) => @handleChange(e)
+    @lineFolder.on 'change', (e) => @handleChange(e)
 
   setMaxLength: (@maxLength) ->
     oldRange = @rangeForAllLines()
@@ -18,7 +18,7 @@ class LineWrapper
 
   buildLineMap: ->
     @lineMap = new LineMap
-    @lineMap.insertAtBufferRow 0, @buildScreenLinesForBufferRows(0, @highlighter.lastRow())
+    @lineMap.insertAtBufferRow 0, @buildScreenLinesForBufferRows(0, @lineFolder.lastRow())
 
   handleChange: (e) ->
     oldBufferRange = e.oldRange
@@ -41,7 +41,7 @@ class LineWrapper
     new Range([0, 0], [endRow, endColumn])
 
   buildScreenLinesForBufferRows: (start, end) ->
-    _(@highlighter
+    _(@lineFolder
       .linesForScreenRows(start, end)
       .map((screenLine) => @wrapScreenLine(screenLine))).flatten()