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| 1 <!-- | |
| 2 @license | |
| 3 Copyright (c) 2014 The Polymer Project Authors. All rights reserved. | |
| 4 This code may only be used under the BSD style license found at http://polym
er.github.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/CO
NTRIBUTORS.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/P
ATENTS.txt | |
| 9 --> | |
| 10 | |
| 11 <!-- | |
| 12 `<core-label>` provides a version of the `<label>` element that works with Custo
m Elements as well as native elements. | |
| 13 | |
| 14 All text in the `core-label` will be applied to the target element as a screen-r
eader accessible description. | |
| 15 | |
| 16 There are two ways to use `core-label` to target an element: | |
| 17 | |
| 18 1. place an element inside core-label with the `for` attribute: | |
| 19 | |
| 20 <core-label> | |
| 21 Context for the Button | |
| 22 <paper-button for>button</paper-button> | |
| 23 </core-label> | |
| 24 | |
| 25 2. Set the `for` attribute on the `core-label` element to point to a target elem
ent in the same scope with a query | |
| 26 string: | |
| 27 | |
| 28 <core-label for=".foo"> | |
| 29 Context for the button witht the "foo" class" | |
| 30 </core-label> | |
| 31 <paper-button class="foo">Far away button</paper-button> | |
| 32 | |
| 33 All taps on the `core-label` will be forwarded to the "target" element. | |
| 34 | |
| 35 @group Core Elements | |
| 36 @element core-label | |
| 37 @homepage github.io | |
| 38 --> | |
| 39 | |
| 40 <link rel="import" href="../polymer/polymer.html"> | |
| 41 | |
| 42 <!-- Native <label> has cursor: default --> | |
| 43 <style> | |
| 44 html /deep/ core-label { | |
| 45 cursor: default; | |
| 46 } | |
| 47 </style> | |
| 48 | |
| 49 <polymer-element name="core-label"> | |
| 50 <script> | |
| 51 (function() { | |
| 52 | |
| 53 var ID = 0; | |
| 54 function generate(node) { | |
| 55 if (!node.id) { | |
| 56 node.id = 'core-label-' + ID++; | |
| 57 } | |
| 58 return node.id; | |
| 59 } | |
| 60 | |
| 61 Polymer('core-label', { | |
| 62 /** | |
| 63 * A query selector string for a "target" element not nested in the `<co
re-label>` | |
| 64 * | |
| 65 * @attribute for | |
| 66 * @type string | |
| 67 * @default '' | |
| 68 */ | |
| 69 publish: { | |
| 70 'for': {reflect: true, value: ''} | |
| 71 }, | |
| 72 eventDelegates: { | |
| 73 'tap': 'tapHandler' | |
| 74 }, | |
| 75 created: function() { | |
| 76 generate(this); | |
| 77 this._forElement = null; | |
| 78 }, | |
| 79 ready: function() { | |
| 80 if (!this.for) { | |
| 81 this._forElement = this.querySelector('[for]'); | |
| 82 this._tie(); | |
| 83 } | |
| 84 }, | |
| 85 tapHandler: function(ev) { | |
| 86 if (!this._forElement) { | |
| 87 return; | |
| 88 } | |
| 89 if (ev.target === this._forElement) { | |
| 90 return; | |
| 91 } | |
| 92 this._forElement.focus(); | |
| 93 this._forElement.click(); | |
| 94 this.fire('tap', null, this._forElement); | |
| 95 }, | |
| 96 _tie: function() { | |
| 97 if (this._forElement) { | |
| 98 this._forElement.setAttribute('aria-labelledby', this.id); | |
| 99 } | |
| 100 }, | |
| 101 _findScope: function() { | |
| 102 var n = this.parentNode; | |
| 103 while(n && n.parentNode) { | |
| 104 n = n.parentNode; | |
| 105 } | |
| 106 return n; | |
| 107 }, | |
| 108 forChanged: function(oldFor, newFor) { | |
| 109 if (this._forElement) { | |
| 110 this._forElement.removeAttribute('aria-labelledby'); | |
| 111 } | |
| 112 var scope = this._findScope(); | |
| 113 if (!scope) { | |
| 114 return; | |
| 115 } | |
| 116 this._forElement = scope.querySelector(newFor); | |
| 117 if (this._forElement) { | |
| 118 this._tie(); | |
| 119 } | |
| 120 } | |
| 121 }); | |
| 122 })(); | |
| 123 </script> | |
| 124 </polymer-element> | |
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Chromium Code Reviews
Issue 1215543002:
Remove Polymer 0.5. (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master