Tabs try to use an item's longTitle if two tab titles are the same

This will replace edit-session-specific functionality that displayed
the file's parent directory when two files with the same name were
open.

src/packages/tabs/lib/tab-view.coffee

@@ -1,3 +1,4 @@
+$ = require 'jquery'
 {View} = require 'space-pen'
 fs = require 'fs'
 
@@ -9,9 +10,8 @@ class TabView extends View
       @span class: 'close-icon'
 
   initialize: (@item, @pane) ->
-    @title.text(@item.getTitle())
-
-
+    @item.on? 'title-changed', => @updateTitle()
+    @updateTitle()
 #     @buffer = @editSession.buffer
 #     @subscribe @buffer, 'path-changed', => @updateFileName()
 #     @subscribe @buffer, 'contents-modified', => @updateModifiedStatus()
@@ -22,6 +22,24 @@ class TabView extends View
 #     @updateFileName()
 #     @updateModifiedStatus()
 
+  updateTitle: ->
+    return if @updatingTitle
+    @updatingTitle = true
+
+    title = @item.getTitle()
+    useLongTitle = false
+    for tab in @getSiblingTabs()
+      if tab.item.getTitle() is title
+        tab.updateTitle()
+        useLongTitle = true
+    title = @item.getLongTitle?() ? title if useLongTitle
+
+    @title.text(title)
+    @updatingTitle = false
+
+  getSiblingTabs: ->
+    @siblings('.tab').views()
+
   updateModifiedStatus: ->
     if @buffer.isModified()
       @toggleClass('file-modified') unless @isModified

src/packages/tabs/spec/tabs-spec.coffee

@@ -28,6 +28,7 @@ fdescribe "TabBarView", ->
     @content: (title) -> @div title
     initialize: (@title) ->
     getTitle: -> @title
+    getLongTitle: -> @longTitle
 
   beforeEach ->
     item1 = new TestView('Item 1')
@@ -62,7 +63,7 @@ fdescribe "TabBarView", ->
       expect(tabBar.find('.tab:eq(2)')).toHaveClass 'active'
 
   describe "when a new item is added to the pane", ->
-    ffit "adds a tab for the new item at the same index as the item in the pane", ->
+    it "adds a tab for the new item at the same index as the item in the pane", ->
       pane.showItem(item1)
       item3 = new TestView('Item 3')
       pane.showItem(item3)
@@ -95,44 +96,28 @@ fdescribe "TabBarView", ->
       expect(tabBar.getTabs().length).toBe 2
       expect(tabBar.find('.tab:contains(Item 1)')).not.toExist()
 
-  describe "when a file name associated with a tab changes", ->
-    [buffer, oldPath, newPath] = []
-
-    beforeEach ->
-      buffer = editor.editSessions[0].buffer
-      oldPath = "/tmp/file-to-rename.txt"
-      newPath = "/tmp/renamed-file.txt"
-      fs.write(oldPath, "this old path")
-      rootView.open(oldPath)
-
-    afterEach ->
-      fs.remove(newPath) if fs.exists(newPath)
-
-    it "updates the file name in the tab", ->
-      tabFileName = tabs.find('.tab:eq(2) .file-name')
-      expect(tabFileName).toExist()
-      editor.setActiveEditSessionIndex(0)
-      fs.move(oldPath, newPath)
-      waitsFor "file to be renamed", ->
-        tabFileName.text() == "renamed-file.txt"
+  describe "when a tab item's title changes", ->
+    it "updates the title of the item's tab", ->
+      editSession1.buffer.setPath('/this/is-a/test.txt')
+      expect(tabBar.tabForItem(editSession1)).toHaveText 'test.txt'
 
   describe "when two tabs have the same file name", ->
-    [tempPath] = []
+    it "displays the long title on the tab if it's available from the item", ->
+      item1.title = "Old Man"
+      item1.longTitle = "Grumpy Old Man"
+      item1.trigger 'title-changed'
+      item2.title = "Old Man"
+      item2.longTitle = "Jolly Old Man"
+      item2.trigger 'title-changed'
 
-    beforeEach ->
-      tempPath = '/tmp/sample.js'
-      fs.write(tempPath, 'sample')
+      expect(tabBar.tabForItem(item1)).toHaveText "Grumpy Old Man"
+      expect(tabBar.tabForItem(item2)).toHaveText "Jolly Old Man"
 
-    afterEach ->
-      fs.remove(tempPath) if fs.exists(tempPath)
+      item2.longTitle = undefined
+      item2.trigger 'title-changed'
 
-    it "displays the parent folder name after the file name", ->
-      expect(tabs.find('.tab:eq(0) .file-name').text()).toBe 'sample.js'
-      rootView.open(tempPath)
-      expect(tabs.find('.tab:eq(0) .file-name').text()).toBe 'sample.js - fixtures'
-      expect(tabs.find('.tab:last .file-name').text()).toBe 'sample.js - tmp'
-      editor.destroyActiveEditSession()
-      expect(tabs.find('.tab:eq(0) .file-name').text()).toBe 'sample.js'
+      expect(tabBar.tabForItem(item1)).toHaveText "Grumpy Old Man"
+      expect(tabBar.tabForItem(item2)).toHaveText "Old Man"
 
   describe "when an editor:edit-session-order-changed event is triggered", ->
     it "updates the order of the tabs to match the new edit session order", ->