1 | /// <reference lib="WebWorker"/>
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2 |
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3 | var _self = (typeof window !== 'undefined')
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4 | ? window // if in browser
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5 | : (
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6 | (typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope)
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7 | ? self // if in worker
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8 | : {} // if in node js
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9 | );
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10 |
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11 | /**
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12 | * Prism: Lightweight, robust, elegant syntax highlighting
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13 | *
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14 | * @license MIT <https://opensource.org/licenses/MIT>
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15 | * @author Lea Verou <https://lea.verou.me>
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16 | * @namespace
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17 | * @public
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18 | */
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19 | var Prism = (function (_self) {
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20 |
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21 | // Private helper vars
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22 | var lang = /(?:^|\s)lang(?:uage)?-([\w-]+)(?=\s|$)/i;
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23 | var uniqueId = 0;
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24 |
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25 | // The grammar object for plaintext
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26 | var plainTextGrammar = {};
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27 |
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28 |
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29 | var _ = {
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30 | /**
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31 | * By default, Prism will attempt to highlight all code elements (by calling {@link Prism.highlightAll}) on the
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32 | * current page after the page finished loading. This might be a problem if e.g. you wanted to asynchronously load
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33 | * additional languages or plugins yourself.
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34 | *
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35 | * By setting this value to `true`, Prism will not automatically highlight all code elements on the page.
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36 | *
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37 | * You obviously have to change this value before the automatic highlighting started. To do this, you can add an
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38 | * empty Prism object into the global scope before loading the Prism script like this:
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39 | *
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40 | * ```js
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41 | * window.Prism = window.Prism || {};
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42 | * Prism.manual = true;
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43 | * // add a new <script> to load Prism's script
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44 | * ```
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45 | *
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46 | * @default false
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47 | * @type {boolean}
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48 | * @memberof Prism
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49 | * @public
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50 | */
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51 | manual: _self.Prism && _self.Prism.manual,
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52 | /**
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53 | * By default, if Prism is in a web worker, it assumes that it is in a worker it created itself, so it uses
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54 | * `addEventListener` to communicate with its parent instance. However, if you're using Prism manually in your
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55 | * own worker, you don't want it to do this.
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56 | *
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57 | * By setting this value to `true`, Prism will not add its own listeners to the worker.
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58 | *
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59 | * You obviously have to change this value before Prism executes. To do this, you can add an
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60 | * empty Prism object into the global scope before loading the Prism script like this:
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61 | *
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62 | * ```js
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63 | * window.Prism = window.Prism || {};
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64 | * Prism.disableWorkerMessageHandler = true;
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65 | * // Load Prism's script
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66 | * ```
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67 | *
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68 | * @default false
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69 | * @type {boolean}
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70 | * @memberof Prism
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71 | * @public
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72 | */
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73 | disableWorkerMessageHandler: _self.Prism && _self.Prism.disableWorkerMessageHandler,
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74 |
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75 | /**
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76 | * A namespace for utility methods.
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77 | *
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78 | * All function in this namespace that are not explicitly marked as _public_ are for __internal use only__ and may
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79 | * change or disappear at any time.
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80 | *
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81 | * @namespace
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82 | * @memberof Prism
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83 | */
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84 | util: {
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85 | encode: function encode(tokens) {
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86 | if (tokens instanceof Token) {
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87 | return new Token(tokens.type, encode(tokens.content), tokens.alias);
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88 | } else if (Array.isArray(tokens)) {
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89 | return tokens.map(encode);
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90 | } else {
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91 | return tokens.replace(/&/g, '&').replace(/</g, '<').replace(/\u00a0/g, ' ');
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92 | }
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93 | },
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94 |
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95 | /**
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96 | * Returns the name of the type of the given value.
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97 | *
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98 | * @param {any} o
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99 | * @returns {string}
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100 | * @example
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101 | * type(null) === 'Null'
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102 | * type(undefined) === 'Undefined'
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103 | * type(123) === 'Number'
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104 | * type('foo') === 'String'
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105 | * type(true) === 'Boolean'
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106 | * type([1, 2]) === 'Array'
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107 | * type({}) === 'Object'
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108 | * type(String) === 'Function'
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109 | * type(/abc+/) === 'RegExp'
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110 | */
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111 | type: function (o) {
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112 | return Object.prototype.toString.call(o).slice(8, -1);
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113 | },
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114 |
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115 | /**
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116 | * Returns a unique number for the given object. Later calls will still return the same number.
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117 | *
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118 | * @param {Object} obj
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119 | * @returns {number}
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120 | */
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121 | objId: function (obj) {
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122 | if (!obj['__id']) {
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123 | Object.defineProperty(obj, '__id', { value: ++uniqueId });
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124 | }
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125 | return obj['__id'];
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126 | },
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127 |
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128 | /**
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129 | * Creates a deep clone of the given object.
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130 | *
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131 | * The main intended use of this function is to clone language definitions.
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132 | *
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133 | * @param {T} o
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134 | * @param {Record<number, any>} [visited]
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135 | * @returns {T}
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136 | * @template T
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137 | */
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138 | clone: function deepClone(o, visited) {
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139 | visited = visited || {};
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140 |
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141 | var clone; var id;
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142 | switch (_.util.type(o)) {
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143 | case 'Object':
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144 | id = _.util.objId(o);
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145 | if (visited[id]) {
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146 | return visited[id];
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147 | }
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148 | clone = /** @type {Record<string, any>} */ ({});
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149 | visited[id] = clone;
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150 |
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151 | for (var key in o) {
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152 | if (o.hasOwnProperty(key)) {
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153 | clone[key] = deepClone(o[key], visited);
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154 | }
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155 | }
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156 |
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157 | return /** @type {any} */ (clone);
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158 |
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159 | case 'Array':
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160 | id = _.util.objId(o);
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161 | if (visited[id]) {
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162 | return visited[id];
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163 | }
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164 | clone = [];
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165 | visited[id] = clone;
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166 |
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167 | (/** @type {Array} */(/** @type {any} */(o))).forEach(function (v, i) {
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168 | clone[i] = deepClone(v, visited);
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169 | });
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170 |
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171 | return /** @type {any} */ (clone);
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172 |
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173 | default:
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174 | return o;
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175 | }
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176 | },
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177 |
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178 | /**
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179 | * Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class.
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180 | *
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181 | * If no language is set for the element or the element is `null` or `undefined`, `none` will be returned.
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182 | *
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183 | * @param {Element} element
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184 | * @returns {string}
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185 | */
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186 | getLanguage: function (element) {
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187 | while (element) {
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188 | var m = lang.exec(element.className);
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189 | if (m) {
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190 | return m[1].toLowerCase();
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191 | }
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192 | element = element.parentElement;
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193 | }
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194 | return 'none';
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195 | },
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196 |
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197 | /**
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198 | * Sets the Prism `language-xxxx` class of the given element.
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199 | *
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200 | * @param {Element} element
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201 | * @param {string} language
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202 | * @returns {void}
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203 | */
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204 | setLanguage: function (element, language) {
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205 | // remove all `language-xxxx` classes
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206 | // (this might leave behind a leading space)
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207 | element.className = element.className.replace(RegExp(lang, 'gi'), '');
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208 |
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209 | // add the new `language-xxxx` class
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210 | // (using `classList` will automatically clean up spaces for us)
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211 | element.classList.add('language-' + language);
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212 | },
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213 |
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214 | /**
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215 | * Returns the script element that is currently executing.
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216 | *
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217 | * This does __not__ work for line script element.
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218 | *
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219 | * @returns {HTMLScriptElement | null}
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220 | */
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221 | currentScript: function () {
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222 | if (typeof document === 'undefined') {
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223 | return null;
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224 | }
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225 | if ('currentScript' in document && 1 < 2 /* hack to trip TS' flow analysis */) {
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226 | return /** @type {any} */ (document.currentScript);
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227 | }
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228 |
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229 | // IE11 workaround
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230 | // we'll get the src of the current script by parsing IE11's error stack trace
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231 | // this will not work for inline scripts
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232 |
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233 | try {
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234 | throw new Error();
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235 | } catch (err) {
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236 | // Get file src url from stack. Specifically works with the format of stack traces in IE.
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237 | // A stack will look like this:
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238 | //
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239 | // Error
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240 | // at _.util.currentScript (http://localhost/components/prism-core.js:119:5)
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241 | // at Global code (http://localhost/components/prism-core.js:606:1)
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242 |
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243 | var src = (/at [^(\r\n]*\((.*):[^:]+:[^:]+\)$/i.exec(err.stack) || [])[1];
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244 | if (src) {
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245 | var scripts = document.getElementsByTagName('script');
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246 | for (var i in scripts) {
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247 | if (scripts[i].src == src) {
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248 | return scripts[i];
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249 | }
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250 | }
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251 | }
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252 | return null;
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253 | }
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254 | },
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255 |
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256 | /**
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257 | * Returns whether a given class is active for `element`.
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258 | *
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259 | * The class can be activated if `element` or one of its ancestors has the given class and it can be deactivated
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260 | * if `element` or one of its ancestors has the negated version of the given class. The _negated version_ of the
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261 | * given class is just the given class with a `no-` prefix.
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262 | *
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263 | * Whether the class is active is determined by the closest ancestor of `element` (where `element` itself is
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264 | * closest ancestor) that has the given class or the negated version of it. If neither `element` nor any of its
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265 | * ancestors have the given class or the negated version of it, then the default activation will be returned.
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266 | *
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267 | * In the paradoxical situation where the closest ancestor contains __both__ the given class and the negated
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268 | * version of it, the class is considered active.
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269 | *
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270 | * @param {Element} element
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271 | * @param {string} className
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272 | * @param {boolean} [defaultActivation=false]
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273 | * @returns {boolean}
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274 | */
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275 | isActive: function (element, className, defaultActivation) {
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276 | var no = 'no-' + className;
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277 |
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278 | while (element) {
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279 | var classList = element.classList;
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280 | if (classList.contains(className)) {
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281 | return true;
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282 | }
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283 | if (classList.contains(no)) {
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284 | return false;
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285 | }
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286 | element = element.parentElement;
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287 | }
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288 | return !!defaultActivation;
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289 | }
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290 | },
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291 |
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292 | /**
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293 | * This namespace contains all currently loaded languages and the some helper functions to create and modify languages.
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294 | *
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295 | * @namespace
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296 | * @memberof Prism
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297 | * @public
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298 | */
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299 | languages: {
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300 | /**
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301 | * The grammar for plain, unformatted text.
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302 | */
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303 | plain: plainTextGrammar,
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304 | plaintext: plainTextGrammar,
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305 | text: plainTextGrammar,
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306 | txt: plainTextGrammar,
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307 |
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308 | /**
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309 | * Creates a deep copy of the language with the given id and appends the given tokens.
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310 | *
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311 | * If a token in `redef` also appears in the copied language, then the existing token in the copied language
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312 | * will be overwritten at its original position.
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313 | *
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314 | * ## Best practices
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315 | *
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316 | * Since the position of overwriting tokens (token in `redef` that overwrite tokens in the copied language)
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317 | * doesn't matter, they can technically be in any order. However, this can be confusing to others that trying to
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318 | * understand the language definition because, normally, the order of tokens matters in Prism grammars.
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319 | *
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320 | * Therefore, it is encouraged to order overwriting tokens according to the positions of the overwritten tokens.
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321 | * Furthermore, all non-overwriting tokens should be placed after the overwriting ones.
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322 | *
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323 | * @param {string} id The id of the language to extend. This has to be a key in `Prism.languages`.
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324 | * @param {Grammar} redef The new tokens to append.
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325 | * @returns {Grammar} The new language created.
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326 | * @public
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327 | * @example
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328 | * Prism.languages['css-with-colors'] = Prism.languages.extend('css', {
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329 | * // Prism.languages.css already has a 'comment' token, so this token will overwrite CSS' 'comment' token
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330 | * // at its original position
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331 | * 'comment': { ... },
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332 | * // CSS doesn't have a 'color' token, so this token will be appended
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333 | * 'color': /\b(?:red|green|blue)\b/
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334 | * });
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335 | */
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336 | extend: function (id, redef) {
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337 | var lang = _.util.clone(_.languages[id]);
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338 |
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339 | for (var key in redef) {
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340 | lang[key] = redef[key];
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341 | }
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342 |
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343 | return lang;
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344 | },
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345 |
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346 | /**
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347 | * Inserts tokens _before_ another token in a language definition or any other grammar.
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348 | *
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349 | * ## Usage
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350 | *
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351 | * This helper method makes it easy to modify existing languages. For example, the CSS language definition
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352 | * not only defines CSS highlighting for CSS documents, but also needs to define highlighting for CSS embedded
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353 | * in HTML through `<style>` elements. To do this, it needs to modify `Prism.languages.markup` and add the
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354 | * appropriate tokens. However, `Prism.languages.markup` is a regular JavaScript object literal, so if you do
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355 | * this:
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356 | *
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357 | * ```js
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358 | * Prism.languages.markup.style = {
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359 | * // token
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360 | * };
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361 | * ```
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362 | *
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363 | * then the `style` token will be added (and processed) at the end. `insertBefore` allows you to insert tokens
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364 | * before existing tokens. For the CSS example above, you would use it like this:
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365 | *
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366 | * ```js
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367 | * Prism.languages.insertBefore('markup', 'cdata', {
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368 | * 'style': {
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369 | * // token
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370 | * }
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371 | * });
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372 | * ```
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373 | *
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374 | * ## Special cases
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375 | *
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376 | * If the grammars of `inside` and `insert` have tokens with the same name, the tokens in `inside`'s grammar
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377 | * will be ignored.
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378 | *
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379 | * This behavior can be used to insert tokens after `before`:
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380 | *
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381 | * ```js
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382 | * Prism.languages.insertBefore('markup', 'comment', {
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383 | * 'comment': Prism.languages.markup.comment,
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384 | * // tokens after 'comment'
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385 | * });
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386 | * ```
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387 | *
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388 | * ## Limitations
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389 | *
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390 | * The main problem `insertBefore` has to solve is iteration order. Since ES2015, the iteration order for object
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391 | * properties is guaranteed to be the insertion order (except for integer keys) but some browsers behave
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392 | * differently when keys are deleted and re-inserted. So `insertBefore` can't be implemented by temporarily
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393 | * deleting properties which is necessary to insert at arbitrary positions.
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394 | *
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395 | * To solve this problem, `insertBefore` doesn't actually insert the given tokens into the target object.
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396 | * Instead, it will create a new object and replace all references to the target object with the new one. This
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397 | * can be done without temporarily deleting properties, so the iteration order is well-defined.
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398 | *
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399 | * However, only references that can be reached from `Prism.languages` or `insert` will be replaced. I.e. if
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400 | * you hold the target object in a variable, then the value of the variable will not change.
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401 | *
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402 | * ```js
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403 | * var oldMarkup = Prism.languages.markup;
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404 | * var newMarkup = Prism.languages.insertBefore('markup', 'comment', { ... });
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405 | *
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406 | * assert(oldMarkup !== Prism.languages.markup);
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407 | * assert(newMarkup === Prism.languages.markup);
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408 | * ```
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409 | *
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410 | * @param {string} inside The property of `root` (e.g. a language id in `Prism.languages`) that contains the
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411 | * object to be modified.
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412 | * @param {string} before The key to insert before.
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413 | * @param {Grammar} insert An object containing the key-value pairs to be inserted.
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414 | * @param {Object<string, any>} [root] The object containing `inside`, i.e. the object that contains the
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415 | * object to be modified.
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416 | *
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417 | * Defaults to `Prism.languages`.
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418 | * @returns {Grammar} The new grammar object.
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419 | * @public
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420 | */
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421 | insertBefore: function (inside, before, insert, root) {
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422 | root = root || /** @type {any} */ (_.languages);
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423 | var grammar = root[inside];
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424 | /** @type {Grammar} */
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425 | var ret = {};
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426 |
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427 | for (var token in grammar) {
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428 | if (grammar.hasOwnProperty(token)) {
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429 |
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430 | if (token == before) {
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431 | for (var newToken in insert) {
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432 | if (insert.hasOwnProperty(newToken)) {
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433 | ret[newToken] = insert[newToken];
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434 | }
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435 | }
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436 | }
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437 |
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438 | // Do not insert token which also occur in insert. See #1525
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439 | if (!insert.hasOwnProperty(token)) {
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440 | ret[token] = grammar[token];
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441 | }
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442 | }
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443 | }
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444 |
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445 | var old = root[inside];
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446 | root[inside] = ret;
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447 |
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448 | // Update references in other language definitions
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449 | _.languages.DFS(_.languages, function (key, value) {
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450 | if (value === old && key != inside) {
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451 | this[key] = ret;
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452 | }
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453 | });
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454 |
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455 | return ret;
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456 | },
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457 |
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458 | // Traverse a language definition with Depth First Search
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459 | DFS: function DFS(o, callback, type, visited) {
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460 | visited = visited || {};
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461 |
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462 | var objId = _.util.objId;
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463 |
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464 | for (var i in o) {
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465 | if (o.hasOwnProperty(i)) {
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466 | callback.call(o, i, o[i], type || i);
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467 |
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468 | var property = o[i];
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469 | var propertyType = _.util.type(property);
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470 |
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471 | if (propertyType === 'Object' && !visited[objId(property)]) {
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472 | visited[objId(property)] = true;
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473 | DFS(property, callback, null, visited);
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474 | } else if (propertyType === 'Array' && !visited[objId(property)]) {
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475 | visited[objId(property)] = true;
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476 | DFS(property, callback, i, visited);
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477 | }
|
478 | }
|
479 | }
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480 | }
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481 | },
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482 |
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483 | plugins: {},
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484 |
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485 | /**
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486 | * This is the most high-level function in Prism’s API.
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487 | * It fetches all the elements that have a `.language-xxxx` class and then calls {@link Prism.highlightElement} on
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488 | * each one of them.
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489 | *
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490 | * This is equivalent to `Prism.highlightAllUnder(document, async, callback)`.
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491 | *
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492 | * @param {boolean} [async=false] Same as in {@link Prism.highlightAllUnder}.
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493 | * @param {HighlightCallback} [callback] Same as in {@link Prism.highlightAllUnder}.
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494 | * @memberof Prism
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495 | * @public
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496 | */
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497 | highlightAll: function (async, callback) {
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498 | _.highlightAllUnder(document, async, callback);
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499 | },
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500 |
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501 | /**
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502 | * Fetches all the descendants of `container` that have a `.language-xxxx` class and then calls
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503 | * {@link Prism.highlightElement} on each one of them.
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504 | *
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505 | * The following hooks will be run:
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506 | * 1. `before-highlightall`
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507 | * 2. `before-all-elements-highlight`
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508 | * 3. All hooks of {@link Prism.highlightElement} for each element.
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509 | *
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510 | * @param {ParentNode} container The root element, whose descendants that have a `.language-xxxx` class will be highlighted.
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511 | * @param {boolean} [async=false] Whether each element is to be highlighted asynchronously using Web Workers.
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512 | * @param {HighlightCallback} [callback] An optional callback to be invoked on each element after its highlighting is done.
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513 | * @memberof Prism
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514 | * @public
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515 | */
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516 | highlightAllUnder: function (container, async, callback) {
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517 | var env = {
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518 | callback: callback,
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519 | container: container,
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520 | selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'
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521 | };
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522 |
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523 | _.hooks.run('before-highlightall', env);
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524 |
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525 | env.elements = Array.prototype.slice.apply(env.container.querySelectorAll(env.selector));
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526 |
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527 | _.hooks.run('before-all-elements-highlight', env);
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528 |
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529 | for (var i = 0, element; (element = env.elements[i++]);) {
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530 | _.highlightElement(element, async === true, env.callback);
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531 | }
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532 | },
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533 |
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534 | /**
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535 | * Highlights the code inside a single element.
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536 | *
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537 | * The following hooks will be run:
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538 | * 1. `before-sanity-check`
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539 | * 2. `before-highlight`
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540 | * 3. All hooks of {@link Prism.highlight}. These hooks will be run by an asynchronous worker if `async` is `true`.
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541 | * 4. `before-insert`
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542 | * 5. `after-highlight`
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543 | * 6. `complete`
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544 | *
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545 | * Some the above hooks will be skipped if the element doesn't contain any text or there is no grammar loaded for
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546 | * the element's language.
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547 | *
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548 | * @param {Element} element The element containing the code.
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549 | * It must have a class of `language-xxxx` to be processed, where `xxxx` is a valid language identifier.
|
550 | * @param {boolean} [async=false] Whether the element is to be highlighted asynchronously using Web Workers
|
551 | * to improve performance and avoid blocking the UI when highlighting very large chunks of code. This option is
|
552 | * [disabled by default](https://prismjs.com/faq.html#why-is-asynchronous-highlighting-disabled-by-default).
|
553 | *
|
554 | * Note: All language definitions required to highlight the code must be included in the main `prism.js` file for
|
555 | * asynchronous highlighting to work. You can build your own bundle on the
|
556 | * [Download page](https://prismjs.com/download.html).
|
557 | * @param {HighlightCallback} [callback] An optional callback to be invoked after the highlighting is done.
|
558 | * Mostly useful when `async` is `true`, since in that case, the highlighting is done asynchronously.
|
559 | * @memberof Prism
|
560 | * @public
|
561 | */
|
562 | highlightElement: function (element, async, callback) {
|
563 | // Find language
|
564 | var language = _.util.getLanguage(element);
|
565 | var grammar = _.languages[language];
|
566 |
|
567 | // Set language on the element, if not present
|
568 | _.util.setLanguage(element, language);
|
569 |
|
570 | // Set language on the parent, for styling
|
571 | var parent = element.parentElement;
|
572 | if (parent && parent.nodeName.toLowerCase() === 'pre') {
|
573 | _.util.setLanguage(parent, language);
|
574 | }
|
575 |
|
576 | var code = element.textContent;
|
577 |
|
578 | var env = {
|
579 | element: element,
|
580 | language: language,
|
581 | grammar: grammar,
|
582 | code: code
|
583 | };
|
584 |
|
585 | function insertHighlightedCode(highlightedCode) {
|
586 | env.highlightedCode = highlightedCode;
|
587 |
|
588 | _.hooks.run('before-insert', env);
|
589 |
|
590 | env.element.innerHTML = env.highlightedCode;
|
591 |
|
592 | _.hooks.run('after-highlight', env);
|
593 | _.hooks.run('complete', env);
|
594 | callback && callback.call(env.element);
|
595 | }
|
596 |
|
597 | _.hooks.run('before-sanity-check', env);
|
598 |
|
599 | // plugins may change/add the parent/element
|
600 | parent = env.element.parentElement;
|
601 | if (parent && parent.nodeName.toLowerCase() === 'pre' && !parent.hasAttribute('tabindex')) {
|
602 | parent.setAttribute('tabindex', '0');
|
603 | }
|
604 |
|
605 | if (!env.code) {
|
606 | _.hooks.run('complete', env);
|
607 | callback && callback.call(env.element);
|
608 | return;
|
609 | }
|
610 |
|
611 | _.hooks.run('before-highlight', env);
|
612 |
|
613 | if (!env.grammar) {
|
614 | insertHighlightedCode(_.util.encode(env.code));
|
615 | return;
|
616 | }
|
617 |
|
618 | if (async && _self.Worker) {
|
619 | var worker = new Worker(_.filename);
|
620 |
|
621 | worker.onmessage = function (evt) {
|
622 | insertHighlightedCode(evt.data);
|
623 | };
|
624 |
|
625 | worker.postMessage(JSON.stringify({
|
626 | language: env.language,
|
627 | code: env.code,
|
628 | immediateClose: true
|
629 | }));
|
630 | } else {
|
631 | insertHighlightedCode(_.highlight(env.code, env.grammar, env.language));
|
632 | }
|
633 | },
|
634 |
|
635 | /**
|
636 | * Low-level function, only use if you know what you’re doing. It accepts a string of text as input
|
637 | * and the language definitions to use, and returns a string with the HTML produced.
|
638 | *
|
639 | * The following hooks will be run:
|
640 | * 1. `before-tokenize`
|
641 | * 2. `after-tokenize`
|
642 | * 3. `wrap`: On each {@link Token}.
|
643 | *
|
644 | * @param {string} text A string with the code to be highlighted.
|
645 | * @param {Grammar} grammar An object containing the tokens to use.
|
646 | *
|
647 | * Usually a language definition like `Prism.languages.markup`.
|
648 | * @param {string} language The name of the language definition passed to `grammar`.
|
649 | * @returns {string} The highlighted HTML.
|
650 | * @memberof Prism
|
651 | * @public
|
652 | * @example
|
653 | * Prism.highlight('var foo = true;', Prism.languages.javascript, 'javascript');
|
654 | */
|
655 | highlight: function (text, grammar, language) {
|
656 | var env = {
|
657 | code: text,
|
658 | grammar: grammar,
|
659 | language: language
|
660 | };
|
661 | _.hooks.run('before-tokenize', env);
|
662 | if (!env.grammar) {
|
663 | throw new Error('The language "' + env.language + '" has no grammar.');
|
664 | }
|
665 | env.tokens = _.tokenize(env.code, env.grammar);
|
666 | _.hooks.run('after-tokenize', env);
|
667 | return Token.stringify(_.util.encode(env.tokens), env.language);
|
668 | },
|
669 |
|
670 | /**
|
671 | * This is the heart of Prism, and the most low-level function you can use. It accepts a string of text as input
|
672 | * and the language definitions to use, and returns an array with the tokenized code.
|
673 | *
|
674 | * When the language definition includes nested tokens, the function is called recursively on each of these tokens.
|
675 | *
|
676 | * This method could be useful in other contexts as well, as a very crude parser.
|
677 | *
|
678 | * @param {string} text A string with the code to be highlighted.
|
679 | * @param {Grammar} grammar An object containing the tokens to use.
|
680 | *
|
681 | * Usually a language definition like `Prism.languages.markup`.
|
682 | * @returns {TokenStream} An array of strings and tokens, a token stream.
|
683 | * @memberof Prism
|
684 | * @public
|
685 | * @example
|
686 | * let code = `var foo = 0;`;
|
687 | * let tokens = Prism.tokenize(code, Prism.languages.javascript);
|
688 | * tokens.forEach(token => {
|
689 | * if (token instanceof Prism.Token && token.type === 'number') {
|
690 | * console.log(`Found numeric literal: ${token.content}`);
|
691 | * }
|
692 | * });
|
693 | */
|
694 | tokenize: function (text, grammar) {
|
695 | var rest = grammar.rest;
|
696 | if (rest) {
|
697 | for (var token in rest) {
|
698 | grammar[token] = rest[token];
|
699 | }
|
700 |
|
701 | delete grammar.rest;
|
702 | }
|
703 |
|
704 | var tokenList = new LinkedList();
|
705 | addAfter(tokenList, tokenList.head, text);
|
706 |
|
707 | matchGrammar(text, tokenList, grammar, tokenList.head, 0);
|
708 |
|
709 | return toArray(tokenList);
|
710 | },
|
711 |
|
712 | /**
|
713 | * @namespace
|
714 | * @memberof Prism
|
715 | * @public
|
716 | */
|
717 | hooks: {
|
718 | all: {},
|
719 |
|
720 | /**
|
721 | * Adds the given callback to the list of callbacks for the given hook.
|
722 | *
|
723 | * The callback will be invoked when the hook it is registered for is run.
|
724 | * Hooks are usually directly run by a highlight function but you can also run hooks yourself.
|
725 | *
|
726 | * One callback function can be registered to multiple hooks and the same hook multiple times.
|
727 | *
|
728 | * @param {string} name The name of the hook.
|
729 | * @param {HookCallback} callback The callback function which is given environment variables.
|
730 | * @public
|
731 | */
|
732 | add: function (name, callback) {
|
733 | var hooks = _.hooks.all;
|
734 |
|
735 | hooks[name] = hooks[name] || [];
|
736 |
|
737 | hooks[name].push(callback);
|
738 | },
|
739 |
|
740 | /**
|
741 | * Runs a hook invoking all registered callbacks with the given environment variables.
|
742 | *
|
743 | * Callbacks will be invoked synchronously and in the order in which they were registered.
|
744 | *
|
745 | * @param {string} name The name of the hook.
|
746 | * @param {Object<string, any>} env The environment variables of the hook passed to all callbacks registered.
|
747 | * @public
|
748 | */
|
749 | run: function (name, env) {
|
750 | var callbacks = _.hooks.all[name];
|
751 |
|
752 | if (!callbacks || !callbacks.length) {
|
753 | return;
|
754 | }
|
755 |
|
756 | for (var i = 0, callback; (callback = callbacks[i++]);) {
|
757 | callback(env);
|
758 | }
|
759 | }
|
760 | },
|
761 |
|
762 | Token: Token
|
763 | };
|
764 | _self.Prism = _;
|
765 |
|
766 |
|
767 | // Typescript note:
|
768 | // The following can be used to import the Token type in JSDoc:
|
769 | //
|
770 | // @typedef {InstanceType<import("./prism-core")["Token"]>} Token
|
771 |
|
772 | /**
|
773 | * Creates a new token.
|
774 | *
|
775 | * @param {string} type See {@link Token#type type}
|
776 | * @param {string | TokenStream} content See {@link Token#content content}
|
777 | * @param {string|string[]} [alias] The alias(es) of the token.
|
778 | * @param {string} [matchedStr=""] A copy of the full string this token was created from.
|
779 | * @class
|
780 | * @global
|
781 | * @public
|
782 | */
|
783 | function Token(type, content, alias, matchedStr) {
|
784 | /**
|
785 | * The type of the token.
|
786 | *
|
787 | * This is usually the key of a pattern in a {@link Grammar}.
|
788 | *
|
789 | * @type {string}
|
790 | * @see GrammarToken
|
791 | * @public
|
792 | */
|
793 | this.type = type;
|
794 | /**
|
795 | * The strings or tokens contained by this token.
|
796 | *
|
797 | * This will be a token stream if the pattern matched also defined an `inside` grammar.
|
798 | *
|
799 | * @type {string | TokenStream}
|
800 | * @public
|
801 | */
|
802 | this.content = content;
|
803 | /**
|
804 | * The alias(es) of the token.
|
805 | *
|
806 | * @type {string|string[]}
|
807 | * @see GrammarToken
|
808 | * @public
|
809 | */
|
810 | this.alias = alias;
|
811 | // Copy of the full string this token was created from
|
812 | this.length = (matchedStr || '').length | 0;
|
813 | }
|
814 |
|
815 | /**
|
816 | * A token stream is an array of strings and {@link Token Token} objects.
|
817 | *
|
818 | * Token streams have to fulfill a few properties that are assumed by most functions (mostly internal ones) that process
|
819 | * them.
|
820 | *
|
821 | * 1. No adjacent strings.
|
822 | * 2. No empty strings.
|
823 | *
|
824 | * The only exception here is the token stream that only contains the empty string and nothing else.
|
825 | *
|
826 | * @typedef {Array<string | Token>} TokenStream
|
827 | * @global
|
828 | * @public
|
829 | */
|
830 |
|
831 | /**
|
832 | * Converts the given token or token stream to an HTML representation.
|
833 | *
|
834 | * The following hooks will be run:
|
835 | * 1. `wrap`: On each {@link Token}.
|
836 | *
|
837 | * @param {string | Token | TokenStream} o The token or token stream to be converted.
|
838 | * @param {string} language The name of current language.
|
839 | * @returns {string} The HTML representation of the token or token stream.
|
840 | * @memberof Token
|
841 | * @static
|
842 | */
|
843 | Token.stringify = function stringify(o, language) {
|
844 | if (typeof o == 'string') {
|
845 | return o;
|
846 | }
|
847 | if (Array.isArray(o)) {
|
848 | var s = '';
|
849 | o.forEach(function (e) {
|
850 | s += stringify(e, language);
|
851 | });
|
852 | return s;
|
853 | }
|
854 |
|
855 | var env = {
|
856 | type: o.type,
|
857 | content: stringify(o.content, language),
|
858 | tag: 'span',
|
859 | classes: ['token', o.type],
|
860 | attributes: {},
|
861 | language: language
|
862 | };
|
863 |
|
864 | var aliases = o.alias;
|
865 | if (aliases) {
|
866 | if (Array.isArray(aliases)) {
|
867 | Array.prototype.push.apply(env.classes, aliases);
|
868 | } else {
|
869 | env.classes.push(aliases);
|
870 | }
|
871 | }
|
872 |
|
873 | _.hooks.run('wrap', env);
|
874 |
|
875 | var attributes = '';
|
876 | for (var name in env.attributes) {
|
877 | attributes += ' ' + name + '="' + (env.attributes[name] || '').replace(/"/g, '"') + '"';
|
878 | }
|
879 |
|
880 | return '<' + env.tag + ' class="' + env.classes.join(' ') + '"' + attributes + '>' + env.content + '</' + env.tag + '>';
|
881 | };
|
882 |
|
883 | /**
|
884 | * @param {RegExp} pattern
|
885 | * @param {number} pos
|
886 | * @param {string} text
|
887 | * @param {boolean} lookbehind
|
888 | * @returns {RegExpExecArray | null}
|
889 | */
|
890 | function matchPattern(pattern, pos, text, lookbehind) {
|
891 | pattern.lastIndex = pos;
|
892 | var match = pattern.exec(text);
|
893 | if (match && lookbehind && match[1]) {
|
894 | // change the match to remove the text matched by the Prism lookbehind group
|
895 | var lookbehindLength = match[1].length;
|
896 | match.index += lookbehindLength;
|
897 | match[0] = match[0].slice(lookbehindLength);
|
898 | }
|
899 | return match;
|
900 | }
|
901 |
|
902 | /**
|
903 | * @param {string} text
|
904 | * @param {LinkedList<string | Token>} tokenList
|
905 | * @param {any} grammar
|
906 | * @param {LinkedListNode<string | Token>} startNode
|
907 | * @param {number} startPos
|
908 | * @param {RematchOptions} [rematch]
|
909 | * @returns {void}
|
910 | * @private
|
911 | *
|
912 | * @typedef RematchOptions
|
913 | * @property {string} cause
|
914 | * @property {number} reach
|
915 | */
|
916 | function matchGrammar(text, tokenList, grammar, startNode, startPos, rematch) {
|
917 | for (var token in grammar) {
|
918 | if (!grammar.hasOwnProperty(token) || !grammar[token]) {
|
919 | continue;
|
920 | }
|
921 |
|
922 | var patterns = grammar[token];
|
923 | patterns = Array.isArray(patterns) ? patterns : [patterns];
|
924 |
|
925 | for (var j = 0; j < patterns.length; ++j) {
|
926 | if (rematch && rematch.cause == token + ',' + j) {
|
927 | return;
|
928 | }
|
929 |
|
930 | var patternObj = patterns[j];
|
931 | var inside = patternObj.inside;
|
932 | var lookbehind = !!patternObj.lookbehind;
|
933 | var greedy = !!patternObj.greedy;
|
934 | var alias = patternObj.alias;
|
935 |
|
936 | if (greedy && !patternObj.pattern.global) {
|
937 | // Without the global flag, lastIndex won't work
|
938 | var flags = patternObj.pattern.toString().match(/[imsuy]*$/)[0];
|
939 | patternObj.pattern = RegExp(patternObj.pattern.source, flags + 'g');
|
940 | }
|
941 |
|
942 | /** @type {RegExp} */
|
943 | var pattern = patternObj.pattern || patternObj;
|
944 |
|
945 | for ( // iterate the token list and keep track of the current token/string position
|
946 | var currentNode = startNode.next, pos = startPos;
|
947 | currentNode !== tokenList.tail;
|
948 | pos += currentNode.value.length, currentNode = currentNode.next
|
949 | ) {
|
950 |
|
951 | if (rematch && pos >= rematch.reach) {
|
952 | break;
|
953 | }
|
954 |
|
955 | var str = currentNode.value;
|
956 |
|
957 | if (tokenList.length > text.length) {
|
958 | // Something went terribly wrong, ABORT, ABORT!
|
959 | return;
|
960 | }
|
961 |
|
962 | if (str instanceof Token) {
|
963 | continue;
|
964 | }
|
965 |
|
966 | var removeCount = 1; // this is the to parameter of removeBetween
|
967 | var match;
|
968 |
|
969 | if (greedy) {
|
970 | match = matchPattern(pattern, pos, text, lookbehind);
|
971 | if (!match || match.index >= text.length) {
|
972 | break;
|
973 | }
|
974 |
|
975 | var from = match.index;
|
976 | var to = match.index + match[0].length;
|
977 | var p = pos;
|
978 |
|
979 | // find the node that contains the match
|
980 | p += currentNode.value.length;
|
981 | while (from >= p) {
|
982 | currentNode = currentNode.next;
|
983 | p += currentNode.value.length;
|
984 | }
|
985 | // adjust pos (and p)
|
986 | p -= currentNode.value.length;
|
987 | pos = p;
|
988 |
|
989 | // the current node is a Token, then the match starts inside another Token, which is invalid
|
990 | if (currentNode.value instanceof Token) {
|
991 | continue;
|
992 | }
|
993 |
|
994 | // find the last node which is affected by this match
|
995 | for (
|
996 | var k = currentNode;
|
997 | k !== tokenList.tail && (p < to || typeof k.value === 'string');
|
998 | k = k.next
|
999 | ) {
|
1000 | removeCount++;
|
1001 | p += k.value.length;
|
1002 | }
|
1003 | removeCount--;
|
1004 |
|
1005 | // replace with the new match
|
1006 | str = text.slice(pos, p);
|
1007 | match.index -= pos;
|
1008 | } else {
|
1009 | match = matchPattern(pattern, 0, str, lookbehind);
|
1010 | if (!match) {
|
1011 | continue;
|
1012 | }
|
1013 | }
|
1014 |
|
1015 | // eslint-disable-next-line no-redeclare
|
1016 | var from = match.index;
|
1017 | var matchStr = match[0];
|
1018 | var before = str.slice(0, from);
|
1019 | var after = str.slice(from + matchStr.length);
|
1020 |
|
1021 | var reach = pos + str.length;
|
1022 | if (rematch && reach > rematch.reach) {
|
1023 | rematch.reach = reach;
|
1024 | }
|
1025 |
|
1026 | var removeFrom = currentNode.prev;
|
1027 |
|
1028 | if (before) {
|
1029 | removeFrom = addAfter(tokenList, removeFrom, before);
|
1030 | pos += before.length;
|
1031 | }
|
1032 |
|
1033 | removeRange(tokenList, removeFrom, removeCount);
|
1034 |
|
1035 | var wrapped = new Token(token, inside ? _.tokenize(matchStr, inside) : matchStr, alias, matchStr);
|
1036 | currentNode = addAfter(tokenList, removeFrom, wrapped);
|
1037 |
|
1038 | if (after) {
|
1039 | addAfter(tokenList, currentNode, after);
|
1040 | }
|
1041 |
|
1042 | if (removeCount > 1) {
|
1043 | // at least one Token object was removed, so we have to do some rematching
|
1044 | // this can only happen if the current pattern is greedy
|
1045 |
|
1046 | /** @type {RematchOptions} */
|
1047 | var nestedRematch = {
|
1048 | cause: token + ',' + j,
|
1049 | reach: reach
|
1050 | };
|
1051 | matchGrammar(text, tokenList, grammar, currentNode.prev, pos, nestedRematch);
|
1052 |
|
1053 | // the reach might have been extended because of the rematching
|
1054 | if (rematch && nestedRematch.reach > rematch.reach) {
|
1055 | rematch.reach = nestedRematch.reach;
|
1056 | }
|
1057 | }
|
1058 | }
|
1059 | }
|
1060 | }
|
1061 | }
|
1062 |
|
1063 | /**
|
1064 | * @typedef LinkedListNode
|
1065 | * @property {T} value
|
1066 | * @property {LinkedListNode<T> | null} prev The previous node.
|
1067 | * @property {LinkedListNode<T> | null} next The next node.
|
1068 | * @template T
|
1069 | * @private
|
1070 | */
|
1071 |
|
1072 | /**
|
1073 | * @template T
|
1074 | * @private
|
1075 | */
|
1076 | function LinkedList() {
|
1077 | /** @type {LinkedListNode<T>} */
|
1078 | var head = { value: null, prev: null, next: null };
|
1079 | /** @type {LinkedListNode<T>} */
|
1080 | var tail = { value: null, prev: head, next: null };
|
1081 | head.next = tail;
|
1082 |
|
1083 | /** @type {LinkedListNode<T>} */
|
1084 | this.head = head;
|
1085 | /** @type {LinkedListNode<T>} */
|
1086 | this.tail = tail;
|
1087 | this.length = 0;
|
1088 | }
|
1089 |
|
1090 | /**
|
1091 | * Adds a new node with the given value to the list.
|
1092 | *
|
1093 | * @param {LinkedList<T>} list
|
1094 | * @param {LinkedListNode<T>} node
|
1095 | * @param {T} value
|
1096 | * @returns {LinkedListNode<T>} The added node.
|
1097 | * @template T
|
1098 | */
|
1099 | function addAfter(list, node, value) {
|
1100 | // assumes that node != list.tail && values.length >= 0
|
1101 | var next = node.next;
|
1102 |
|
1103 | var newNode = { value: value, prev: node, next: next };
|
1104 | node.next = newNode;
|
1105 | next.prev = newNode;
|
1106 | list.length++;
|
1107 |
|
1108 | return newNode;
|
1109 | }
|
1110 | /**
|
1111 | * Removes `count` nodes after the given node. The given node will not be removed.
|
1112 | *
|
1113 | * @param {LinkedList<T>} list
|
1114 | * @param {LinkedListNode<T>} node
|
1115 | * @param {number} count
|
1116 | * @template T
|
1117 | */
|
1118 | function removeRange(list, node, count) {
|
1119 | var next = node.next;
|
1120 | for (var i = 0; i < count && next !== list.tail; i++) {
|
1121 | next = next.next;
|
1122 | }
|
1123 | node.next = next;
|
1124 | next.prev = node;
|
1125 | list.length -= i;
|
1126 | }
|
1127 | /**
|
1128 | * @param {LinkedList<T>} list
|
1129 | * @returns {T[]}
|
1130 | * @template T
|
1131 | */
|
1132 | function toArray(list) {
|
1133 | var array = [];
|
1134 | var node = list.head.next;
|
1135 | while (node !== list.tail) {
|
1136 | array.push(node.value);
|
1137 | node = node.next;
|
1138 | }
|
1139 | return array;
|
1140 | }
|
1141 |
|
1142 |
|
1143 | if (!_self.document) {
|
1144 | if (!_self.addEventListener) {
|
1145 | // in Node.js
|
1146 | return _;
|
1147 | }
|
1148 |
|
1149 | if (!_.disableWorkerMessageHandler) {
|
1150 | // In worker
|
1151 | _self.addEventListener('message', function (evt) {
|
1152 | var message = JSON.parse(evt.data);
|
1153 | var lang = message.language;
|
1154 | var code = message.code;
|
1155 | var immediateClose = message.immediateClose;
|
1156 |
|
1157 | _self.postMessage(_.highlight(code, _.languages[lang], lang));
|
1158 | if (immediateClose) {
|
1159 | _self.close();
|
1160 | }
|
1161 | }, false);
|
1162 | }
|
1163 |
|
1164 | return _;
|
1165 | }
|
1166 |
|
1167 | // Get current script and highlight
|
1168 | var script = _.util.currentScript();
|
1169 |
|
1170 | if (script) {
|
1171 | _.filename = script.src;
|
1172 |
|
1173 | if (script.hasAttribute('data-manual')) {
|
1174 | _.manual = true;
|
1175 | }
|
1176 | }
|
1177 |
|
1178 | function highlightAutomaticallyCallback() {
|
1179 | if (!_.manual) {
|
1180 | _.highlightAll();
|
1181 | }
|
1182 | }
|
1183 |
|
1184 | if (!_.manual) {
|
1185 | // If the document state is "loading", then we'll use DOMContentLoaded.
|
1186 | // If the document state is "interactive" and the prism.js script is deferred, then we'll also use the
|
1187 | // DOMContentLoaded event because there might be some plugins or languages which have also been deferred and they
|
1188 | // might take longer one animation frame to execute which can create a race condition where only some plugins have
|
1189 | // been loaded when Prism.highlightAll() is executed, depending on how fast resources are loaded.
|
1190 | // See https://github.com/PrismJS/prism/issues/2102
|
1191 | var readyState = document.readyState;
|
1192 | if (readyState === 'loading' || readyState === 'interactive' && script && script.defer) {
|
1193 | document.addEventListener('DOMContentLoaded', highlightAutomaticallyCallback);
|
1194 | } else {
|
1195 | if (window.requestAnimationFrame) {
|
1196 | window.requestAnimationFrame(highlightAutomaticallyCallback);
|
1197 | } else {
|
1198 | window.setTimeout(highlightAutomaticallyCallback, 16);
|
1199 | }
|
1200 | }
|
1201 | }
|
1202 |
|
1203 | return _;
|
1204 |
|
1205 | }(_self));
|
1206 |
|
1207 | if (typeof module !== 'undefined' && module.exports) {
|
1208 | module.exports = Prism;
|
1209 | }
|
1210 |
|
1211 | // hack for components to work correctly in node.js
|
1212 | if (typeof global !== 'undefined') {
|
1213 | global.Prism = Prism;
|
1214 | }
|
1215 |
|
1216 | // some additional documentation/types
|
1217 |
|
1218 | /**
|
1219 | * The expansion of a simple `RegExp` literal to support additional properties.
|
1220 | *
|
1221 | * @typedef GrammarToken
|
1222 | * @property {RegExp} pattern The regular expression of the token.
|
1223 | * @property {boolean} [lookbehind=false] If `true`, then the first capturing group of `pattern` will (effectively)
|
1224 | * behave as a lookbehind group meaning that the captured text will not be part of the matched text of the new token.
|
1225 | * @property {boolean} [greedy=false] Whether the token is greedy.
|
1226 | * @property {string|string[]} [alias] An optional alias or list of aliases.
|
1227 | * @property {Grammar} [inside] The nested grammar of this token.
|
1228 | *
|
1229 | * The `inside` grammar will be used to tokenize the text value of each token of this kind.
|
1230 | *
|
1231 | * This can be used to make nested and even recursive language definitions.
|
1232 | *
|
1233 | * Note: This can cause infinite recursion. Be careful when you embed different languages or even the same language into
|
1234 | * each another.
|
1235 | * @global
|
1236 | * @public
|
1237 | */
|
1238 |
|
1239 | /**
|
1240 | * @typedef Grammar
|
1241 | * @type {Object<string, RegExp | GrammarToken | Array<RegExp | GrammarToken>>}
|
1242 | * @property {Grammar} [rest] An optional grammar object that will be appended to this grammar.
|
1243 | * @global
|
1244 | * @public
|
1245 | */
|
1246 |
|
1247 | /**
|
1248 | * A function which will invoked after an element was successfully highlighted.
|
1249 | *
|
1250 | * @callback HighlightCallback
|
1251 | * @param {Element} element The element successfully highlighted.
|
1252 | * @returns {void}
|
1253 | * @global
|
1254 | * @public
|
1255 | */
|
1256 |
|
1257 | /**
|
1258 | * @callback HookCallback
|
1259 | * @param {Object<string, any>} env The environment variables of the hook.
|
1260 | * @returns {void}
|
1261 | * @global
|
1262 | * @public
|
1263 | */
|