         for row in [newStart...newStart + newLines]
           linesHighlighted += @gutter.find(".line-number[lineNumber=#{row - 1}]").addClass('git-line-modified').length
     @gutter.hasGitLineDiffs = linesHighlighted > 0
+
+_.extend GitDiffView.prototype, Subscriber

    @gutter = @editor.gutter
    @diffs = {}

    @editor.on 'editor:path-changed', => @subscribeToBuffer()
    @editor.on 'editor:display-updated', => @renderDiffs()
    git.on 'statuses-changed', =>
      @diffs = {}
      @scheduleUpdate()
    git.on 'status-changed', (path) =>
      delete @diffs[path]
      @scheduleUpdate() if path is @editor.getPath()

    @subscribeToBuffer()

  subscribeToBuffer: ->
    if @buffer?

_ = require 'underscore'
Subscriber = require 'subscriber'

module.exports =
class GitDiffView
