Always update the soft wrap column when the window resizes

This allows the edit session and display buffer to always be
notified of soft wrap column changes regardless of their initial
soft wrap state.

spec/editor-spec.coffee

@@ -2670,3 +2670,11 @@ describe "Editor", ->
 
       for rowNumber in [1..5]
         expect(editor.lineElementForScreenRow(rowNumber).text()).toBe buffer.lineForRow(rowNumber)
+
+  describe "when the window is resized", ->
+    it "updates the active edit session with the current soft wrap column", ->
+      editor.attachToDom()
+      expect(editor.activeEditSession.getSoftWrapColumn()).toBe 78
+      editor.width(editor.width() * 2)
+      $(window).trigger 'resize'
+      expect(editor.activeEditSession.getSoftWrapColumn()).toBe 155

src/display-buffer.coffee

@@ -10,8 +10,6 @@ Token = require 'token'
 DisplayBufferMarker = require 'display-buffer-marker'
 Subscriber = require 'subscriber'
 
-DefaultSoftWrapColumn = 1000000
-
 module.exports =
 class DisplayBuffer
   @acceptsDocuments: true
@@ -36,7 +34,7 @@ class DisplayBuffer
         id: @id
         tokenizedBuffer: @tokenizedBuffer.getState()
         softWrap: softWrap ? false
-        softWrapColumn: softWrapColumn ? DefaultSoftWrapColumn
+        softWrapColumn: softWrapColumn
 
     @markers = {}
     @foldsByMarkerId = {}
@@ -408,6 +406,7 @@ class DisplayBuffer
   # Returns a {Number} representing the `line` position where the wrap would take place.
   # Returns `null` if a wrap wouldn't occur.
   findWrapColumn: (line, softWrapColumn=@getSoftWrapColumn()) ->
+    return unless @getSoftWrap()
     return unless line.length > softWrapColumn
 
     if /\s/.test(line[softWrapColumn])

src/edit-session.coffee

@@ -198,6 +198,8 @@ class EditSession
   # softWrapColumn - A {Number} defining the soft wrap limit
   setSoftWrapColumn: (@softWrapColumn) -> @displayBuffer.setSoftWrapColumn(@softWrapColumn)
 
+  getSoftWrapColumn: -> @displayBuffer.getSoftWrapColumn()
+
   getSoftTabs: ->
     @state.get('softTabs')
 

src/editor.coffee

@@ -719,8 +719,10 @@ class Editor extends View
     return if @attached
     @attached = true
     @calculateDimensions()
-    @setSoftWrapColumn() if @activeEditSession.getSoftWrap()
-    @subscribe $(window), "resize.editor-#{@id}", => @requestDisplayUpdate()
+    @setSoftWrapColumn()
+    @subscribe $(window), "resize.editor-#{@id}", =>
+      @setSoftWrapColumn()
+      @requestDisplayUpdate()
     @focus() if @isFocused
 
     if pane = @getPane()
@@ -919,11 +921,8 @@ class Editor extends View
     if @activeEditSession.getSoftWrap()
       @addClass 'soft-wrap'
       @scrollLeft(0)
-      @_setSoftWrapColumn = => @setSoftWrapColumn()
-      $(window).on "resize.editor-#{@id}", @_setSoftWrapColumn
     else
       @removeClass 'soft-wrap'
-      $(window).off 'resize', @_setSoftWrapColumn
 
   # Sets the font size for the editor.
   #