Convert src/title-bar.coffee to js

Signed-off-by: Jason Rudolph <jasonrudolph@github.com>

src/title-bar.coffee

@@ -1,34 +0,0 @@
-module.exports =
-class TitleBar
-  constructor: ({@workspace, @themes, @applicationDelegate}) ->
-    @element = document.createElement('div')
-    @element.classList.add('title-bar')
-
-    @titleElement = document.createElement('div')
-    @titleElement.classList.add('title')
-    @element.appendChild(@titleElement)
-
-    @element.addEventListener 'dblclick', @dblclickHandler
-
-    @workspace.onDidChangeWindowTitle => @updateTitle()
-    @themes.onDidChangeActiveThemes => @updateWindowSheetOffset()
-
-    @updateTitle()
-    @updateWindowSheetOffset()
-
-  dblclickHandler: =>
-    # User preference deciding which action to take on a title bar double-click
-    switch @applicationDelegate.getUserDefault('AppleActionOnDoubleClick', 'string')
-      when 'Minimize'
-        @applicationDelegate.minimizeWindow()
-      when 'Maximize'
-        if @applicationDelegate.isWindowMaximized()
-          @applicationDelegate.unmaximizeWindow()
-        else
-          @applicationDelegate.maximizeWindow()
-
-  updateTitle: ->
-    @titleElement.textContent = document.title
-
-  updateWindowSheetOffset: ->
-    @applicationDelegate.getCurrentWindow().setSheetOffset(@element.offsetHeight)

src/title-bar.js

@@ -0,0 +1,47 @@
+module.exports =
+class TitleBar {
+  constructor ({workspace, themes, applicationDelegate}) {
+    this.dblclickHandler = this.dblclickHandler.bind(this)
+    this.workspace = workspace
+    this.themes = themes
+    this.applicationDelegate = applicationDelegate
+    this.element = document.createElement('div')
+    this.element.classList.add('title-bar')
+
+    this.titleElement = document.createElement('div')
+    this.titleElement.classList.add('title')
+    this.element.appendChild(this.titleElement)
+
+    this.element.addEventListener('dblclick', this.dblclickHandler)
+
+    this.workspace.onDidChangeWindowTitle(() => this.updateTitle())
+    this.themes.onDidChangeActiveThemes(() => this.updateWindowSheetOffset())
+
+    this.updateTitle()
+    this.updateWindowSheetOffset()
+  }
+
+  dblclickHandler () {
+    // User preference deciding which action to take on a title bar double-click
+    switch (this.applicationDelegate.getUserDefault('AppleActionOnDoubleClick', 'string')) {
+      case 'Minimize':
+        this.applicationDelegate.minimizeWindow()
+        break
+      case 'Maximize':
+        if (this.applicationDelegate.isWindowMaximized()) {
+          this.applicationDelegate.unmaximizeWindow()
+        } else {
+          this.applicationDelegate.maximizeWindow()
+        }
+        break
+    }
+  }
+
+  updateTitle () {
+    this.titleElement.textContent = document.title
+  }
+
+  updateWindowSheetOffset () {
+    this.applicationDelegate.getCurrentWindow().setSheetOffset(this.element.offsetHeight)
+  }
+}