MD user manager (learn more page, user manager tutorial)

chrome/browser/resources/md_user_manager/user_manager_tutorial.js

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+/**
+ * @fileoverview 'user-manager-tutorial' is the element that controls the
+ * tutorial steps for the user manager page.
+ *
+ * @element user-manager-tutorial
+ */
+Polymer({
+  is: 'user-manager-tutorial',
+
+  properties: {
+    /**
+     * True if the tutorial is currently hidden.
+     * @private {boolean}
+     */
+    hidden_: {
+      type: Boolean,
+      value: true
+    },
+
+    /**
+     * Current tutorial step, index in the steps array.
+     * @type {number}
+     */
+    currentStep_: {
+      type: Number,
+      value: 0
+    }
+  },
+
+  /** @override */
+  created: function() {
+    this.steps_ = ['yourChrome', 'friends', 'guests', 'complete', 'notYou'];
+  },
+
+  /**
+   * Determines whether a given step is displaying.
+   * @param {string} currentStep Index of the current step
+   * @param {string} step Name of the given step
+   * @return {boolean}
+   * @private
+   */
+  isStepHidden_: function(currentStep, step) {
+    return this.steps_[currentStep] != step;
+  },
+
+  /**
+   * Navigates to the next step.
+   * @private
+   */
+  onNextTap_: function() {
+    var nextStep = this.currentStep_ + 1;
+
+    // The last tutorial step is an information bubble that ends the tutorial.
+    if (nextStep >= this.steps_.length)
+      this.onDissmissTap_();
+    else
+      this.currentStep_ = nextStep;
+  },
+
+  /**
+   * Handler for the link in the last step. Takes user to the create-profile
+   * page in order to add a new profile.
+   * @param {!Event} event
+   * @private
+   */
+  onAddUserTap_: function(event) {
+    this.onDissmissTap_();
+    // Event is caught by user-manager-pages.
+    this.fire('change-page', {page: 'create-user-page'});
+  },
+
+  /**
+   * Starts the tutorial.
+   */
+  startTutorial: function() {
+    this.currentStep_ = 0;
+    this.hidden_ = false;
+
+    // If there's only one pod, show the steps to the side of the pod.
+    // Otherwise, center the steps and disable interacting with the pods
+    // while the tutorial is showing.
+    var podRow = /** @type {{focusPod: !function(), pods: !Array}} */
+        ($('pod-row'));
+
+    if (podRow.pods.length == 1) {
+      this.$.yourChrome.classList.add('single-pod');
+      this.$.complete.classList.add('single-pod');
+    }
+
+    podRow.focusPod();  // No focused pods.
+    $('inner-container').classList.add('disabled');
+  },
+
+  /**
+   * Ends the tutorial.
+   * @private
+   */
+  onDissmissTap_: function() {
+    $('inner-container').classList.remove('disabled');
+    this.hidden_ = true;
+  }
+});