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 |
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8 | var LANGUAGE_REGEX = /^diff-([\w-]+)/i;
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9 | var HTML_TAG = /<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/g;
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10 |
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11 | var HTML_LINE = RegExp(/(?:__|[^\r\n<])*(?:\r\n?|\n|(?:__|[^\r\n<])(?![^\r\n]))/.source.replace(/__/g, function () { return HTML_TAG.source; }), 'gi');
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12 |
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13 | var warningLogged = false;
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14 |
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15 | Prism.hooks.add('before-sanity-check', function (env) {
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16 | var lang = env.language;
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17 | if (LANGUAGE_REGEX.test(lang) && !env.grammar) {
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18 | env.grammar = Prism.languages[lang] = Prism.languages.diff;
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19 | }
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20 | });
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21 | Prism.hooks.add('before-tokenize', function (env) {
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22 | if (!warningLogged && !Prism.languages.diff && !Prism.plugins.autoloader) {
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23 | warningLogged = true;
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24 | console.warn("Prism's Diff Highlight plugin requires the Diff language definition (prism-diff.js)." +
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25 | "Make sure the language definition is loaded or use Prism's Autoloader plugin.");
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26 | }
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27 |
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28 | var lang = env.language;
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29 | if (LANGUAGE_REGEX.test(lang) && !Prism.languages[lang]) {
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30 | Prism.languages[lang] = Prism.languages.diff;
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31 | }
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32 | });
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33 |
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34 | Prism.hooks.add('wrap', function (env) {
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35 | var diffLanguage; var diffGrammar;
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36 |
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37 | if (env.language !== 'diff') {
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38 | var langMatch = LANGUAGE_REGEX.exec(env.language);
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39 | if (!langMatch) {
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40 | return;
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41 | }
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42 |
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43 | diffLanguage = langMatch[1];
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44 | diffGrammar = Prism.languages[diffLanguage];
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45 | }
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46 |
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47 | var PREFIXES = Prism.languages.diff && Prism.languages.diff.PREFIXES;
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48 |
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49 |
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50 | if (PREFIXES && env.type in PREFIXES) {
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51 |
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52 | var content = env.content.replace(HTML_TAG, '');
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53 |
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54 |
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55 | var decoded = content.replace(/</g, '<').replace(/&/g, '&');
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56 |
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57 |
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58 | var code = decoded.replace(/(^|[\r\n])./g, '$1');
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59 |
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60 |
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61 | var highlighted;
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62 | if (diffGrammar) {
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63 | highlighted = Prism.highlight(code, diffGrammar, diffLanguage);
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64 | } else {
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65 | highlighted = Prism.util.encode(code);
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66 | }
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67 |
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68 |
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69 | var prefixToken = new Prism.Token('prefix', PREFIXES[env.type], [/\w+/.exec(env.type)[0]]);
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70 | var prefix = Prism.Token.stringify(prefixToken, env.language);
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71 |
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72 |
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73 | var lines = []; var m;
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74 | HTML_LINE.lastIndex = 0;
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75 | while ((m = HTML_LINE.exec(highlighted))) {
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76 | lines.push(prefix + m[0]);
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77 | }
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78 | if (/(?:^|[\r\n]).$/.test(decoded)) {
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79 |
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80 | lines.push(prefix);
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81 | }
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82 | env.content = lines.join('');
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83 |
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84 | if (diffGrammar) {
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85 | env.classes.push('language-' + diffLanguage);
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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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