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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 <link rel="import" href="prism-import.html"> |
| 14 |
| 15 <!-- |
| 16 Syntax highlighting via [Prism](http://prismjs.com/). |
| 17 |
| 18 Place a `<prism-highlighter>` in your document, preferably as a direct child of |
| 19 `<body>`. It will listen for `syntax-highlight` events on its parent element, |
| 20 and annotate the code being provided via that event. |
| 21 |
| 22 The `syntax-highlight` event's detail is expected to have a `code` property |
| 23 containing the source to highlight. The event detail can optionally contain a |
| 24 `lang` property, containing a string like `"html"`, `"js"`, etc. |
| 25 |
| 26 This flow is supported by [`<marked-element>`](https://github.com/PolymerElement
s/marked-element). |
| 27 --> |
| 28 <script> |
| 29 (function() { |
| 30 |
| 31 'use strict'; |
| 32 |
| 33 var HIGHLIGHT_EVENT = 'syntax-highlight'; |
| 34 |
| 35 Polymer({ |
| 36 |
| 37 is: 'prism-highlighter', |
| 38 |
| 39 ready: function() { |
| 40 this._handler = this._highlight.bind(this); |
| 41 }, |
| 42 |
| 43 attached: function() { |
| 44 (this.parentElement || this.parentNode.host).addEventListener(HIGHLIGHT_EV
ENT, this._handler); |
| 45 }, |
| 46 |
| 47 detached: function() { |
| 48 (this.parentElement || this.parentNode.host).removeEventListener(HIGHLIGHT
_EVENT, this._handler); |
| 49 }, |
| 50 |
| 51 /** |
| 52 * Handle the highlighting event, if we can. |
| 53 * |
| 54 * @param {!CustomEvent} event |
| 55 */ |
| 56 _highlight: function(event) { |
| 57 if (!event.detail || !event.detail.code) { |
| 58 console.warn('Malformed', HIGHLIGHT_EVENT, 'event:', event.detail); |
| 59 return; |
| 60 } |
| 61 |
| 62 var detail = event.detail; |
| 63 detail.code = Prism.highlight(detail.code, this._detectLang(detail.code, d
etail.lang)); |
| 64 }, |
| 65 |
| 66 /** |
| 67 * Picks a Prism formatter based on the `lang` hint and `code`. |
| 68 * |
| 69 * @param {string} code The source being highlighted. |
| 70 * @param {string=} lang A language hint (e.g. ````LANG`). |
| 71 * @return {!prism.Lang} |
| 72 */ |
| 73 _detectLang: function(code, lang) { |
| 74 if (!lang) { |
| 75 // Stupid simple detection if we have no lang, courtesy of: |
| 76 // https://github.com/robdodson/mark-down/blob/ac2eaa/mark-down.html#L93
-101 |
| 77 return code.match(/^\s*</) ? Prism.languages.markup : Prism.languages.ja
vascript; |
| 78 } |
| 79 |
| 80 if (lang === 'js' || lang.substr(0, 2) === 'es') { |
| 81 return Prism.languages.javascript; |
| 82 } else if (lang === 'css') { |
| 83 return Prism.languages.css; |
| 84 } else if (lang === 'c') { |
| 85 return Prism.langauges.clike; |
| 86 } else { |
| 87 // The assumption is that you're mostly documenting HTML when in HTML. |
| 88 return Prism.languages.markup; |
| 89 } |
| 90 }, |
| 91 |
| 92 }); |
| 93 |
| 94 })(); |
| 95 </script> |
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Chromium Code Reviews
Issue 1205703007:
Add polymer 1.0 to npm_modules (Closed)
Base URL: https://chromium.googlesource.com/infra/third_party/npm_modules.git@master