1 | (function () {
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2 |
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3 | if (typeof Prism === 'undefined') {
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4 | return;
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5 | }
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6 |
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7 | var autoLinkerProcess = function (grammar) {
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8 | if (Prism.plugins.autolinker) {
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9 | Prism.plugins.autolinker.processGrammar(grammar);
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10 | }
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11 | return grammar;
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12 | };
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13 | var dataURI = {
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14 | pattern: /(.)\bdata:[^\/]+\/[^,]+,(?:(?!\1)[\s\S]|\\\1)+(?=\1)/,
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15 | lookbehind: true,
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16 | inside: {
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17 | 'language-css': {
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18 | pattern: /(data:[^\/]+\/(?:[^+,]+\+)?css,)[\s\S]+/,
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19 | lookbehind: true
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20 | },
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21 | 'language-javascript': {
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22 | pattern: /(data:[^\/]+\/(?:[^+,]+\+)?javascript,)[\s\S]+/,
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23 | lookbehind: true
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24 | },
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25 | 'language-json': {
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26 | pattern: /(data:[^\/]+\/(?:[^+,]+\+)?json,)[\s\S]+/,
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27 | lookbehind: true
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28 | },
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29 | 'language-markup': {
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30 | pattern: /(data:[^\/]+\/(?:[^+,]+\+)?(?:html|xml),)[\s\S]+/,
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31 | lookbehind: true
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32 | }
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33 | }
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34 | };
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35 |
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36 |
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37 | var candidates = ['url', 'attr-value', 'string'];
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38 |
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39 | Prism.plugins.dataURIHighlight = {
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40 | processGrammar: function (grammar) {
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41 |
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42 | if (!grammar || grammar['data-uri']) {
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43 | return;
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44 | }
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45 |
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46 | Prism.languages.DFS(grammar, function (key, def, type) {
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47 | if (candidates.indexOf(type) > -1 && !Array.isArray(def)) {
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48 | if (!def.pattern) {
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49 | def = this[key] = {
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50 | pattern: def
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51 | };
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52 | }
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53 |
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54 | def.inside = def.inside || {};
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55 |
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56 | if (type == 'attr-value') {
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57 | Prism.languages.insertBefore('inside', def.inside['url-link'] ? 'url-link' : 'punctuation', {
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58 | 'data-uri': dataURI
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59 | }, def);
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60 | } else {
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61 | if (def.inside['url-link']) {
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62 | Prism.languages.insertBefore('inside', 'url-link', {
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63 | 'data-uri': dataURI
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64 | }, def);
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65 | } else {
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66 | def.inside['data-uri'] = dataURI;
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67 | }
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68 | }
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69 | }
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70 | });
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71 | grammar['data-uri'] = dataURI;
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72 | }
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73 | };
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74 |
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75 | Prism.hooks.add('before-highlight', function (env) {
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76 |
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77 | if (dataURI.pattern.test(env.code)) {
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78 | for (var p in dataURI.inside) {
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79 | if (dataURI.inside.hasOwnProperty(p)) {
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80 | if (!dataURI.inside[p].inside && dataURI.inside[p].pattern.test(env.code)) {
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81 | var lang = p.match(/^language-(.+)/)[1];
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82 | if (Prism.languages[lang]) {
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83 | dataURI.inside[p].inside = {
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84 | rest: autoLinkerProcess(Prism.languages[lang])
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85 | };
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86 | }
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87 | }
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88 | }
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89 | }
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90 | }
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91 |
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92 | Prism.plugins.dataURIHighlight.processGrammar(env.grammar);
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93 | });
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94 | }());
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