1 |
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2 | 'use strict';
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3 |
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4 | var object = {};
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5 | var hasOwnProperty = object.hasOwnProperty;
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6 | var merge = function merge(options, defaults) {
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7 | if (!options) {
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8 | return defaults;
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9 | }
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10 | var result = {};
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11 | for (var key in defaults) {
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12 |
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13 |
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14 | result[key] = hasOwnProperty.call(options, key) ? options[key] : defaults[key];
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15 | }
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16 | return result;
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17 | };
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18 |
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19 | var regexAnySingleEscape = /[ -,\.\/:-@\[-\^`\{-~]/;
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20 | var regexSingleEscape = /[ -,\.\/:-@\[\]\^`\{-~]/;
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21 | var regexAlwaysEscape = /['"\\]/;
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22 | var regexExcessiveSpaces = /(^|\\+)?(\\[A-F0-9]{1,6})\x20(?![a-fA-F0-9\x20])/g;
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23 |
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24 |
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25 | var cssesc = function cssesc(string, options) {
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26 | options = merge(options, cssesc.options);
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27 | if (options.quotes != 'single' && options.quotes != 'double') {
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28 | options.quotes = 'single';
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29 | }
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30 | var quote = options.quotes == 'double' ? '"' : '\'';
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31 | var isIdentifier = options.isIdentifier;
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32 |
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33 | var firstChar = string.charAt(0);
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34 | var output = '';
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35 | var counter = 0;
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36 | var length = string.length;
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37 | while (counter < length) {
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38 | var character = string.charAt(counter++);
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39 | var codePoint = character.charCodeAt();
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40 | var value = void 0;
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41 |
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42 | if (codePoint < 0x20 || codePoint > 0x7E) {
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43 | if (codePoint >= 0xD800 && codePoint <= 0xDBFF && counter < length) {
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44 |
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45 | var extra = string.charCodeAt(counter++);
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46 | if ((extra & 0xFC00) == 0xDC00) {
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47 |
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48 | codePoint = ((codePoint & 0x3FF) << 10) + (extra & 0x3FF) + 0x10000;
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49 | } else {
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50 |
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51 |
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52 | counter--;
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53 | }
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54 | }
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55 | value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
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56 | } else {
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57 | if (options.escapeEverything) {
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58 | if (regexAnySingleEscape.test(character)) {
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59 | value = '\\' + character;
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60 | } else {
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61 | value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
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62 | }
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63 | } else if (/[\t\n\f\r\x0B]/.test(character)) {
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64 | value = '\\' + codePoint.toString(16).toUpperCase() + ' ';
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65 | } else if (character == '\\' || !isIdentifier && (character == '"' && quote == character || character == '\'' && quote == character) || isIdentifier && regexSingleEscape.test(character)) {
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66 | value = '\\' + character;
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67 | } else {
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68 | value = character;
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69 | }
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70 | }
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71 | output += value;
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72 | }
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73 |
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74 | if (isIdentifier) {
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75 | if (/^-[-\d]/.test(output)) {
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76 | output = '\\-' + output.slice(1);
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77 | } else if (/\d/.test(firstChar)) {
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78 | output = '\\3' + firstChar + ' ' + output.slice(1);
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79 | }
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80 | }
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81 |
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82 |
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83 |
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84 |
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85 | output = output.replace(regexExcessiveSpaces, function ($0, $1, $2) {
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86 | if ($1 && $1.length % 2) {
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87 |
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88 | return $0;
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89 | }
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90 |
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91 | return ($1 || '') + $2;
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92 | });
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93 |
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94 | if (!isIdentifier && options.wrap) {
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95 | return quote + output + quote;
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96 | }
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97 | return output;
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98 | };
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99 |
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100 |
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101 | cssesc.options = {
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102 | 'escapeEverything': false,
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103 | 'isIdentifier': false,
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104 | 'quotes': 'single',
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105 | 'wrap': false
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106 | };
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107 |
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108 | cssesc.version = '3.0.0';
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109 |
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110 | module.exports = cssesc;
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