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 invisibles = {
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9 | 'tab': /\t/,
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10 | 'crlf': /\r\n/,
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11 | 'lf': /\n/,
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12 | 'cr': /\r/,
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13 | 'space': / /
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14 | };
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15 |
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16 |
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17 | |
18 |
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19 |
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20 |
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21 |
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22 |
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23 | function handleToken(tokens, name) {
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24 | var value = tokens[name];
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25 |
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26 | var type = Prism.util.type(value);
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27 | switch (type) {
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28 | case 'RegExp':
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29 | var inside = {};
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30 | tokens[name] = {
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31 | pattern: value,
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32 | inside: inside
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33 | };
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34 | addInvisibles(inside);
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35 | break;
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36 |
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37 | case 'Array':
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38 | for (var i = 0, l = value.length; i < l; i++) {
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39 | handleToken(value, i);
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40 | }
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41 | break;
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42 |
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43 | default:
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44 |
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45 | var inside = value.inside || (value.inside = {});
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46 | addInvisibles(inside);
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47 | break;
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48 | }
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49 | }
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50 |
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51 | |
52 |
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53 |
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54 |
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55 |
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56 | function addInvisibles(grammar) {
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57 | if (!grammar || grammar['tab']) {
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58 | return;
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59 | }
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60 |
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61 |
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62 | for (var name in invisibles) {
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63 | if (invisibles.hasOwnProperty(name)) {
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64 | grammar[name] = invisibles[name];
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65 | }
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66 | }
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67 |
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68 |
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69 | for (var name in grammar) {
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70 | if (grammar.hasOwnProperty(name) && !invisibles[name]) {
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71 | if (name === 'rest') {
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72 | addInvisibles(grammar['rest']);
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73 | } else {
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74 | handleToken(grammar, name);
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75 | }
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76 | }
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77 | }
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78 | }
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79 |
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80 | Prism.hooks.add('before-highlight', function (env) {
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81 | addInvisibles(env.grammar);
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82 | });
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83 | }());
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