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| 1 <!-- |
| 2 @license |
| 3 Copyright (c) 2015 The Polymer Project Authors. All rights reserved. |
| 4 This code may only be used under the BSD style license found at http://polymer.g
ithub.io/LICENSE.txt |
| 5 The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt |
| 6 The complete set of contributors may be found at http://polymer.github.io/CONTRI
BUTORS.txt |
| 7 Code distributed by Google as part of the polymer project is also |
| 8 subject to an additional IP rights grant found at http://polymer.github.io/PATEN
TS.txt |
| 9 --> |
| 10 |
| 11 <link rel="import" href="../polymer/polymer.html"> |
| 12 |
| 13 <script> |
| 14 |
| 15 /** @polymerBehavior */ |
| 16 Polymer.PaperSpinnerBehavior = { |
| 17 |
| 18 listeners: { |
| 19 'animationend': '__reset', |
| 20 'webkitAnimationEnd': '__reset' |
| 21 }, |
| 22 |
| 23 properties: { |
| 24 /** |
| 25 * Displays the spinner. |
| 26 */ |
| 27 active: { |
| 28 type: Boolean, |
| 29 value: false, |
| 30 reflectToAttribute: true, |
| 31 observer: '__activeChanged' |
| 32 }, |
| 33 |
| 34 /** |
| 35 * Alternative text content for accessibility support. |
| 36 * If alt is present, it will add an aria-label whose content matches alt
when active. |
| 37 * If alt is not present, it will default to 'loading' as the alt value. |
| 38 */ |
| 39 alt: { |
| 40 type: String, |
| 41 value: 'loading', |
| 42 observer: '__altChanged' |
| 43 }, |
| 44 |
| 45 __coolingDown: { |
| 46 type: Boolean, |
| 47 value: false |
| 48 } |
| 49 }, |
| 50 |
| 51 __computeContainerClasses: function(active, coolingDown) { |
| 52 return [ |
| 53 active || coolingDown ? 'active' : '', |
| 54 coolingDown ? 'cooldown' : '' |
| 55 ].join(' '); |
| 56 }, |
| 57 |
| 58 __activeChanged: function(active, old) { |
| 59 this.__setAriaHidden(!active); |
| 60 this.__coolingDown = !active && old; |
| 61 }, |
| 62 |
| 63 __altChanged: function(alt) { |
| 64 // user-provided `aria-label` takes precedence over prototype default |
| 65 if (alt === this.getPropertyInfo('alt').value) { |
| 66 this.alt = this.getAttribute('aria-label') || alt; |
| 67 } else { |
| 68 this.__setAriaHidden(alt===''); |
| 69 this.setAttribute('aria-label', alt); |
| 70 } |
| 71 }, |
| 72 |
| 73 __setAriaHidden: function(hidden) { |
| 74 var attr = 'aria-hidden'; |
| 75 if (hidden) { |
| 76 this.setAttribute(attr, 'true'); |
| 77 } else { |
| 78 this.removeAttribute(attr); |
| 79 } |
| 80 }, |
| 81 |
| 82 __reset: function() { |
| 83 this.active = false; |
| 84 this.__coolingDown = false; |
| 85 } |
| 86 }; |
| 87 </script> |
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