mirror of https://github.com/jkjoy/sunpeiwen.git
1264 lines
38 KiB
JavaScript
1264 lines
38 KiB
JavaScript
/// <reference lib="WebWorker"/>
|
||
|
||
var _self = (typeof window !== 'undefined')
|
||
? window // if in browser
|
||
: (
|
||
(typeof WorkerGlobalScope !== 'undefined' && self instanceof WorkerGlobalScope)
|
||
? self // if in worker
|
||
: {} // if in node js
|
||
);
|
||
|
||
/**
|
||
* Prism: Lightweight, robust, elegant syntax highlighting
|
||
*
|
||
* @license MIT <https://opensource.org/licenses/MIT>
|
||
* @author Lea Verou <https://lea.verou.me>
|
||
* @namespace
|
||
* @public
|
||
*/
|
||
var Prism = (function (_self) {
|
||
|
||
// Private helper vars
|
||
var lang = /(?:^|\s)lang(?:uage)?-([\w-]+)(?=\s|$)/i;
|
||
var uniqueId = 0;
|
||
|
||
// The grammar object for plaintext
|
||
var plainTextGrammar = {};
|
||
|
||
|
||
var _ = {
|
||
/**
|
||
* By default, Prism will attempt to highlight all code elements (by calling {@link Prism.highlightAll}) on the
|
||
* current page after the page finished loading. This might be a problem if e.g. you wanted to asynchronously load
|
||
* additional languages or plugins yourself.
|
||
*
|
||
* By setting this value to `true`, Prism will not automatically highlight all code elements on the page.
|
||
*
|
||
* You obviously have to change this value before the automatic highlighting started. To do this, you can add an
|
||
* empty Prism object into the global scope before loading the Prism script like this:
|
||
*
|
||
* ```js
|
||
* window.Prism = window.Prism || {};
|
||
* Prism.manual = true;
|
||
* // add a new <script> to load Prism's script
|
||
* ```
|
||
*
|
||
* @default false
|
||
* @type {boolean}
|
||
* @memberof Prism
|
||
* @public
|
||
*/
|
||
manual: _self.Prism && _self.Prism.manual,
|
||
/**
|
||
* By default, if Prism is in a web worker, it assumes that it is in a worker it created itself, so it uses
|
||
* `addEventListener` to communicate with its parent instance. However, if you're using Prism manually in your
|
||
* own worker, you don't want it to do this.
|
||
*
|
||
* By setting this value to `true`, Prism will not add its own listeners to the worker.
|
||
*
|
||
* You obviously have to change this value before Prism executes. To do this, you can add an
|
||
* empty Prism object into the global scope before loading the Prism script like this:
|
||
*
|
||
* ```js
|
||
* window.Prism = window.Prism || {};
|
||
* Prism.disableWorkerMessageHandler = true;
|
||
* // Load Prism's script
|
||
* ```
|
||
*
|
||
* @default false
|
||
* @type {boolean}
|
||
* @memberof Prism
|
||
* @public
|
||
*/
|
||
disableWorkerMessageHandler: _self.Prism && _self.Prism.disableWorkerMessageHandler,
|
||
|
||
/**
|
||
* A namespace for utility methods.
|
||
*
|
||
* All function in this namespace that are not explicitly marked as _public_ are for __internal use only__ and may
|
||
* change or disappear at any time.
|
||
*
|
||
* @namespace
|
||
* @memberof Prism
|
||
*/
|
||
util: {
|
||
encode: function encode(tokens) {
|
||
if (tokens instanceof Token) {
|
||
return new Token(tokens.type, encode(tokens.content), tokens.alias);
|
||
} else if (Array.isArray(tokens)) {
|
||
return tokens.map(encode);
|
||
} else {
|
||
return tokens.replace(/&/g, '&').replace(/</g, '<').replace(/\u00a0/g, ' ');
|
||
}
|
||
},
|
||
|
||
/**
|
||
* Returns the name of the type of the given value.
|
||
*
|
||
* @param {any} o
|
||
* @returns {string}
|
||
* @example
|
||
* type(null) === 'Null'
|
||
* type(undefined) === 'Undefined'
|
||
* type(123) === 'Number'
|
||
* type('foo') === 'String'
|
||
* type(true) === 'Boolean'
|
||
* type([1, 2]) === 'Array'
|
||
* type({}) === 'Object'
|
||
* type(String) === 'Function'
|
||
* type(/abc+/) === 'RegExp'
|
||
*/
|
||
type: function (o) {
|
||
return Object.prototype.toString.call(o).slice(8, -1);
|
||
},
|
||
|
||
/**
|
||
* Returns a unique number for the given object. Later calls will still return the same number.
|
||
*
|
||
* @param {Object} obj
|
||
* @returns {number}
|
||
*/
|
||
objId: function (obj) {
|
||
if (!obj['__id']) {
|
||
Object.defineProperty(obj, '__id', { value: ++uniqueId });
|
||
}
|
||
return obj['__id'];
|
||
},
|
||
|
||
/**
|
||
* Creates a deep clone of the given object.
|
||
*
|
||
* The main intended use of this function is to clone language definitions.
|
||
*
|
||
* @param {T} o
|
||
* @param {Record<number, any>} [visited]
|
||
* @returns {T}
|
||
* @template T
|
||
*/
|
||
clone: function deepClone(o, visited) {
|
||
visited = visited || {};
|
||
|
||
var clone; var id;
|
||
switch (_.util.type(o)) {
|
||
case 'Object':
|
||
id = _.util.objId(o);
|
||
if (visited[id]) {
|
||
return visited[id];
|
||
}
|
||
clone = /** @type {Record<string, any>} */ ({});
|
||
visited[id] = clone;
|
||
|
||
for (var key in o) {
|
||
if (o.hasOwnProperty(key)) {
|
||
clone[key] = deepClone(o[key], visited);
|
||
}
|
||
}
|
||
|
||
return /** @type {any} */ (clone);
|
||
|
||
case 'Array':
|
||
id = _.util.objId(o);
|
||
if (visited[id]) {
|
||
return visited[id];
|
||
}
|
||
clone = [];
|
||
visited[id] = clone;
|
||
|
||
(/** @type {Array} */(/** @type {any} */(o))).forEach(function (v, i) {
|
||
clone[i] = deepClone(v, visited);
|
||
});
|
||
|
||
return /** @type {any} */ (clone);
|
||
|
||
default:
|
||
return o;
|
||
}
|
||
},
|
||
|
||
/**
|
||
* Returns the Prism language of the given element set by a `language-xxxx` or `lang-xxxx` class.
|
||
*
|
||
* If no language is set for the element or the element is `null` or `undefined`, `none` will be returned.
|
||
*
|
||
* @param {Element} element
|
||
* @returns {string}
|
||
*/
|
||
getLanguage: function (element) {
|
||
while (element) {
|
||
var m = lang.exec(element.className);
|
||
if (m) {
|
||
return m[1].toLowerCase();
|
||
}
|
||
element = element.parentElement;
|
||
}
|
||
return 'none';
|
||
},
|
||
|
||
/**
|
||
* Sets the Prism `language-xxxx` class of the given element.
|
||
*
|
||
* @param {Element} element
|
||
* @param {string} language
|
||
* @returns {void}
|
||
*/
|
||
setLanguage: function (element, language) {
|
||
// remove all `language-xxxx` classes
|
||
// (this might leave behind a leading space)
|
||
element.className = element.className.replace(RegExp(lang, 'gi'), '');
|
||
|
||
// add the new `language-xxxx` class
|
||
// (using `classList` will automatically clean up spaces for us)
|
||
element.classList.add('language-' + language);
|
||
},
|
||
|
||
/**
|
||
* Returns the script element that is currently executing.
|
||
*
|
||
* This does __not__ work for line script element.
|
||
*
|
||
* @returns {HTMLScriptElement | null}
|
||
*/
|
||
currentScript: function () {
|
||
if (typeof document === 'undefined') {
|
||
return null;
|
||
}
|
||
if ('currentScript' in document && 1 < 2 /* hack to trip TS' flow analysis */) {
|
||
return /** @type {any} */ (document.currentScript);
|
||
}
|
||
|
||
// IE11 workaround
|
||
// we'll get the src of the current script by parsing IE11's error stack trace
|
||
// this will not work for inline scripts
|
||
|
||
try {
|
||
throw new Error();
|
||
} catch (err) {
|
||
// Get file src url from stack. Specifically works with the format of stack traces in IE.
|
||
// A stack will look like this:
|
||
//
|
||
// Error
|
||
// at _.util.currentScript (http://localhost/components/prism-core.js:119:5)
|
||
// at Global code (http://localhost/components/prism-core.js:606:1)
|
||
|
||
var src = (/at [^(\r\n]*\((.*):[^:]+:[^:]+\)$/i.exec(err.stack) || [])[1];
|
||
if (src) {
|
||
var scripts = document.getElementsByTagName('script');
|
||
for (var i in scripts) {
|
||
if (scripts[i].src == src) {
|
||
return scripts[i];
|
||
}
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
},
|
||
|
||
/**
|
||
* Returns whether a given class is active for `element`.
|
||
*
|
||
* The class can be activated if `element` or one of its ancestors has the given class and it can be deactivated
|
||
* if `element` or one of its ancestors has the negated version of the given class. The _negated version_ of the
|
||
* given class is just the given class with a `no-` prefix.
|
||
*
|
||
* Whether the class is active is determined by the closest ancestor of `element` (where `element` itself is
|
||
* closest ancestor) that has the given class or the negated version of it. If neither `element` nor any of its
|
||
* ancestors have the given class or the negated version of it, then the default activation will be returned.
|
||
*
|
||
* In the paradoxical situation where the closest ancestor contains __both__ the given class and the negated
|
||
* version of it, the class is considered active.
|
||
*
|
||
* @param {Element} element
|
||
* @param {string} className
|
||
* @param {boolean} [defaultActivation=false]
|
||
* @returns {boolean}
|
||
*/
|
||
isActive: function (element, className, defaultActivation) {
|
||
var no = 'no-' + className;
|
||
|
||
while (element) {
|
||
var classList = element.classList;
|
||
if (classList.contains(className)) {
|
||
return true;
|
||
}
|
||
if (classList.contains(no)) {
|
||
return false;
|
||
}
|
||
element = element.parentElement;
|
||
}
|
||
return !!defaultActivation;
|
||
}
|
||
},
|
||
|
||
/**
|
||
* This namespace contains all currently loaded languages and the some helper functions to create and modify languages.
|
||
*
|
||
* @namespace
|
||
* @memberof Prism
|
||
* @public
|
||
*/
|
||
languages: {
|
||
/**
|
||
* The grammar for plain, unformatted text.
|
||
*/
|
||
plain: plainTextGrammar,
|
||
plaintext: plainTextGrammar,
|
||
text: plainTextGrammar,
|
||
txt: plainTextGrammar,
|
||
|
||
/**
|
||
* Creates a deep copy of the language with the given id and appends the given tokens.
|
||
*
|
||
* If a token in `redef` also appears in the copied language, then the existing token in the copied language
|
||
* will be overwritten at its original position.
|
||
*
|
||
* ## Best practices
|
||
*
|
||
* Since the position of overwriting tokens (token in `redef` that overwrite tokens in the copied language)
|
||
* doesn't matter, they can technically be in any order. However, this can be confusing to others that trying to
|
||
* understand the language definition because, normally, the order of tokens matters in Prism grammars.
|
||
*
|
||
* Therefore, it is encouraged to order overwriting tokens according to the positions of the overwritten tokens.
|
||
* Furthermore, all non-overwriting tokens should be placed after the overwriting ones.
|
||
*
|
||
* @param {string} id The id of the language to extend. This has to be a key in `Prism.languages`.
|
||
* @param {Grammar} redef The new tokens to append.
|
||
* @returns {Grammar} The new language created.
|
||
* @public
|
||
* @example
|
||
* Prism.languages['css-with-colors'] = Prism.languages.extend('css', {
|
||
* // Prism.languages.css already has a 'comment' token, so this token will overwrite CSS' 'comment' token
|
||
* // at its original position
|
||
* 'comment': { ... },
|
||
* // CSS doesn't have a 'color' token, so this token will be appended
|
||
* 'color': /\b(?:red|green|blue)\b/
|
||
* });
|
||
*/
|
||
extend: function (id, redef) {
|
||
var lang = _.util.clone(_.languages[id]);
|
||
|
||
for (var key in redef) {
|
||
lang[key] = redef[key];
|
||
}
|
||
|
||
return lang;
|
||
},
|
||
|
||
/**
|
||
* Inserts tokens _before_ another token in a language definition or any other grammar.
|
||
*
|
||
* ## Usage
|
||
*
|
||
* This helper method makes it easy to modify existing languages. For example, the CSS language definition
|
||
* not only defines CSS highlighting for CSS documents, but also needs to define highlighting for CSS embedded
|
||
* in HTML through `<style>` elements. To do this, it needs to modify `Prism.languages.markup` and add the
|
||
* appropriate tokens. However, `Prism.languages.markup` is a regular JavaScript object literal, so if you do
|
||
* this:
|
||
*
|
||
* ```js
|
||
* Prism.languages.markup.style = {
|
||
* // token
|
||
* };
|
||
* ```
|
||
*
|
||
* then the `style` token will be added (and processed) at the end. `insertBefore` allows you to insert tokens
|
||
* before existing tokens. For the CSS example above, you would use it like this:
|
||
*
|
||
* ```js
|
||
* Prism.languages.insertBefore('markup', 'cdata', {
|
||
* 'style': {
|
||
* // token
|
||
* }
|
||
* });
|
||
* ```
|
||
*
|
||
* ## Special cases
|
||
*
|
||
* If the grammars of `inside` and `insert` have tokens with the same name, the tokens in `inside`'s grammar
|
||
* will be ignored.
|
||
*
|
||
* This behavior can be used to insert tokens after `before`:
|
||
*
|
||
* ```js
|
||
* Prism.languages.insertBefore('markup', 'comment', {
|
||
* 'comment': Prism.languages.markup.comment,
|
||
* // tokens after 'comment'
|
||
* });
|
||
* ```
|
||
*
|
||
* ## Limitations
|
||
*
|
||
* The main problem `insertBefore` has to solve is iteration order. Since ES2015, the iteration order for object
|
||
* properties is guaranteed to be the insertion order (except for integer keys) but some browsers behave
|
||
* differently when keys are deleted and re-inserted. So `insertBefore` can't be implemented by temporarily
|
||
* deleting properties which is necessary to insert at arbitrary positions.
|
||
*
|
||
* To solve this problem, `insertBefore` doesn't actually insert the given tokens into the target object.
|
||
* Instead, it will create a new object and replace all references to the target object with the new one. This
|
||
* can be done without temporarily deleting properties, so the iteration order is well-defined.
|
||
*
|
||
* However, only references that can be reached from `Prism.languages` or `insert` will be replaced. I.e. if
|
||
* you hold the target object in a variable, then the value of the variable will not change.
|
||
*
|
||
* ```js
|
||
* var oldMarkup = Prism.languages.markup;
|
||
* var newMarkup = Prism.languages.insertBefore('markup', 'comment', { ... });
|
||
*
|
||
* assert(oldMarkup !== Prism.languages.markup);
|
||
* assert(newMarkup === Prism.languages.markup);
|
||
* ```
|
||
*
|
||
* @param {string} inside The property of `root` (e.g. a language id in `Prism.languages`) that contains the
|
||
* object to be modified.
|
||
* @param {string} before The key to insert before.
|
||
* @param {Grammar} insert An object containing the key-value pairs to be inserted.
|
||
* @param {Object<string, any>} [root] The object containing `inside`, i.e. the object that contains the
|
||
* object to be modified.
|
||
*
|
||
* Defaults to `Prism.languages`.
|
||
* @returns {Grammar} The new grammar object.
|
||
* @public
|
||
*/
|
||
insertBefore: function (inside, before, insert, root) {
|
||
root = root || /** @type {any} */ (_.languages);
|
||
var grammar = root[inside];
|
||
/** @type {Grammar} */
|
||
var ret = {};
|
||
|
||
for (var token in grammar) {
|
||
if (grammar.hasOwnProperty(token)) {
|
||
|
||
if (token == before) {
|
||
for (var newToken in insert) {
|
||
if (insert.hasOwnProperty(newToken)) {
|
||
ret[newToken] = insert[newToken];
|
||
}
|
||
}
|
||
}
|
||
|
||
// Do not insert token which also occur in insert. See #1525
|
||
if (!insert.hasOwnProperty(token)) {
|
||
ret[token] = grammar[token];
|
||
}
|
||
}
|
||
}
|
||
|
||
var old = root[inside];
|
||
root[inside] = ret;
|
||
|
||
// Update references in other language definitions
|
||
_.languages.DFS(_.languages, function (key, value) {
|
||
if (value === old && key != inside) {
|
||
this[key] = ret;
|
||
}
|
||
});
|
||
|
||
return ret;
|
||
},
|
||
|
||
// Traverse a language definition with Depth First Search
|
||
DFS: function DFS(o, callback, type, visited) {
|
||
visited = visited || {};
|
||
|
||
var objId = _.util.objId;
|
||
|
||
for (var i in o) {
|
||
if (o.hasOwnProperty(i)) {
|
||
callback.call(o, i, o[i], type || i);
|
||
|
||
var property = o[i];
|
||
var propertyType = _.util.type(property);
|
||
|
||
if (propertyType === 'Object' && !visited[objId(property)]) {
|
||
visited[objId(property)] = true;
|
||
DFS(property, callback, null, visited);
|
||
} else if (propertyType === 'Array' && !visited[objId(property)]) {
|
||
visited[objId(property)] = true;
|
||
DFS(property, callback, i, visited);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
},
|
||
|
||
plugins: {},
|
||
|
||
/**
|
||
* This is the most high-level function in Prism’s API.
|
||
* It fetches all the elements that have a `.language-xxxx` class and then calls {@link Prism.highlightElement} on
|
||
* each one of them.
|
||
*
|
||
* This is equivalent to `Prism.highlightAllUnder(document, async, callback)`.
|
||
*
|
||
* @param {boolean} [async=false] Same as in {@link Prism.highlightAllUnder}.
|
||
* @param {HighlightCallback} [callback] Same as in {@link Prism.highlightAllUnder}.
|
||
* @memberof Prism
|
||
* @public
|
||
*/
|
||
highlightAll: function (async, callback) {
|
||
_.highlightAllUnder(document, async, callback);
|
||
},
|
||
|
||
/**
|
||
* Fetches all the descendants of `container` that have a `.language-xxxx` class and then calls
|
||
* {@link Prism.highlightElement} on each one of them.
|
||
*
|
||
* The following hooks will be run:
|
||
* 1. `before-highlightall`
|
||
* 2. `before-all-elements-highlight`
|
||
* 3. All hooks of {@link Prism.highlightElement} for each element.
|
||
*
|
||
* @param {ParentNode} container The root element, whose descendants that have a `.language-xxxx` class will be highlighted.
|
||
* @param {boolean} [async=false] Whether each element is to be highlighted asynchronously using Web Workers.
|
||
* @param {HighlightCallback} [callback] An optional callback to be invoked on each element after its highlighting is done.
|
||
* @memberof Prism
|
||
* @public
|
||
*/
|
||
highlightAllUnder: function (container, async, callback) {
|
||
var env = {
|
||
callback: callback,
|
||
container: container,
|
||
selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'
|
||
};
|
||
|
||
_.hooks.run('before-highlightall', env);
|
||
|
||
env.elements = Array.prototype.slice.apply(env.container.querySelectorAll(env.selector));
|
||
|
||
_.hooks.run('before-all-elements-highlight', env);
|
||
|
||
for (var i = 0, element; (element = env.elements[i++]);) {
|
||
_.highlightElement(element, async === true, env.callback);
|
||
}
|
||
},
|
||
|
||
/**
|
||
* Highlights the code inside a single element.
|
||
*
|
||
* The following hooks will be run:
|
||
* 1. `before-sanity-check`
|
||
* 2. `before-highlight`
|
||
* 3. All hooks of {@link Prism.highlight}. These hooks will be run by an asynchronous worker if `async` is `true`.
|
||
* 4. `before-insert`
|
||
* 5. `after-highlight`
|
||
* 6. `complete`
|
||
*
|
||
* Some the above hooks will be skipped if the element doesn't contain any text or there is no grammar loaded for
|
||
* the element's language.
|
||
*
|
||
* @param {Element} element The element containing the code.
|
||
* It must have a class of `language-xxxx` to be processed, where `xxxx` is a valid language identifier.
|
||
* @param {boolean} [async=false] Whether the element is to be highlighted asynchronously using Web Workers
|
||
* to improve performance and avoid blocking the UI when highlighting very large chunks of code. This option is
|
||
* [disabled by default](https://prismjs.com/faq.html#why-is-asynchronous-highlighting-disabled-by-default).
|
||
*
|
||
* Note: All language definitions required to highlight the code must be included in the main `prism.js` file for
|
||
* asynchronous highlighting to work. You can build your own bundle on the
|
||
* [Download page](https://prismjs.com/download.html).
|
||
* @param {HighlightCallback} [callback] An optional callback to be invoked after the highlighting is done.
|
||
* Mostly useful when `async` is `true`, since in that case, the highlighting is done asynchronously.
|
||
* @memberof Prism
|
||
* @public
|
||
*/
|
||
highlightElement: function (element, async, callback) {
|
||
// Find language
|
||
var language = _.util.getLanguage(element);
|
||
var grammar = _.languages[language];
|
||
|
||
// Set language on the element, if not present
|
||
_.util.setLanguage(element, language);
|
||
|
||
// Set language on the parent, for styling
|
||
var parent = element.parentElement;
|
||
if (parent && parent.nodeName.toLowerCase() === 'pre') {
|
||
_.util.setLanguage(parent, language);
|
||
}
|
||
|
||
var code = element.textContent;
|
||
|
||
var env = {
|
||
element: element,
|
||
language: language,
|
||
grammar: grammar,
|
||
code: code
|
||
};
|
||
|
||
function insertHighlightedCode(highlightedCode) {
|
||
env.highlightedCode = highlightedCode;
|
||
|
||
_.hooks.run('before-insert', env);
|
||
|
||
env.element.innerHTML = env.highlightedCode;
|
||
|
||
_.hooks.run('after-highlight', env);
|
||
_.hooks.run('complete', env);
|
||
callback && callback.call(env.element);
|
||
}
|
||
|
||
_.hooks.run('before-sanity-check', env);
|
||
|
||
// plugins may change/add the parent/element
|
||
parent = env.element.parentElement;
|
||
if (parent && parent.nodeName.toLowerCase() === 'pre' && !parent.hasAttribute('tabindex')) {
|
||
parent.setAttribute('tabindex', '0');
|
||
}
|
||
|
||
if (!env.code) {
|
||
_.hooks.run('complete', env);
|
||
callback && callback.call(env.element);
|
||
return;
|
||
}
|
||
|
||
_.hooks.run('before-highlight', env);
|
||
|
||
if (!env.grammar) {
|
||
insertHighlightedCode(_.util.encode(env.code));
|
||
return;
|
||
}
|
||
|
||
if (async && _self.Worker) {
|
||
var worker = new Worker(_.filename);
|
||
|
||
worker.onmessage = function (evt) {
|
||
insertHighlightedCode(evt.data);
|
||
};
|
||
|
||
worker.postMessage(JSON.stringify({
|
||
language: env.language,
|
||
code: env.code,
|
||
immediateClose: true
|
||
}));
|
||
} else {
|
||
insertHighlightedCode(_.highlight(env.code, env.grammar, env.language));
|
||
}
|
||
},
|
||
|
||
/**
|
||
* Low-level function, only use if you know what you’re doing. It accepts a string of text as input
|
||
* and the language definitions to use, and returns a string with the HTML produced.
|
||
*
|
||
* The following hooks will be run:
|
||
* 1. `before-tokenize`
|
||
* 2. `after-tokenize`
|
||
* 3. `wrap`: On each {@link Token}.
|
||
*
|
||
* @param {string} text A string with the code to be highlighted.
|
||
* @param {Grammar} grammar An object containing the tokens to use.
|
||
*
|
||
* Usually a language definition like `Prism.languages.markup`.
|
||
* @param {string} language The name of the language definition passed to `grammar`.
|
||
* @returns {string} The highlighted HTML.
|
||
* @memberof Prism
|
||
* @public
|
||
* @example
|
||
* Prism.highlight('var foo = true;', Prism.languages.javascript, 'javascript');
|
||
*/
|
||
highlight: function (text, grammar, language) {
|
||
var env = {
|
||
code: text,
|
||
grammar: grammar,
|
||
language: language
|
||
};
|
||
_.hooks.run('before-tokenize', env);
|
||
if (!env.grammar) {
|
||
throw new Error('The language "' + env.language + '" has no grammar.');
|
||
}
|
||
env.tokens = _.tokenize(env.code, env.grammar);
|
||
_.hooks.run('after-tokenize', env);
|
||
return Token.stringify(_.util.encode(env.tokens), env.language);
|
||
},
|
||
|
||
/**
|
||
* This is the heart of Prism, and the most low-level function you can use. It accepts a string of text as input
|
||
* and the language definitions to use, and returns an array with the tokenized code.
|
||
*
|
||
* When the language definition includes nested tokens, the function is called recursively on each of these tokens.
|
||
*
|
||
* This method could be useful in other contexts as well, as a very crude parser.
|
||
*
|
||
* @param {string} text A string with the code to be highlighted.
|
||
* @param {Grammar} grammar An object containing the tokens to use.
|
||
*
|
||
* Usually a language definition like `Prism.languages.markup`.
|
||
* @returns {TokenStream} An array of strings and tokens, a token stream.
|
||
* @memberof Prism
|
||
* @public
|
||
* @example
|
||
* let code = `var foo = 0;`;
|
||
* let tokens = Prism.tokenize(code, Prism.languages.javascript);
|
||
* tokens.forEach(token => {
|
||
* if (token instanceof Prism.Token && token.type === 'number') {
|
||
* console.log(`Found numeric literal: ${token.content}`);
|
||
* }
|
||
* });
|
||
*/
|
||
tokenize: function (text, grammar) {
|
||
var rest = grammar.rest;
|
||
if (rest) {
|
||
for (var token in rest) {
|
||
grammar[token] = rest[token];
|
||
}
|
||
|
||
delete grammar.rest;
|
||
}
|
||
|
||
var tokenList = new LinkedList();
|
||
addAfter(tokenList, tokenList.head, text);
|
||
|
||
matchGrammar(text, tokenList, grammar, tokenList.head, 0);
|
||
|
||
return toArray(tokenList);
|
||
},
|
||
|
||
/**
|
||
* @namespace
|
||
* @memberof Prism
|
||
* @public
|
||
*/
|
||
hooks: {
|
||
all: {},
|
||
|
||
/**
|
||
* Adds the given callback to the list of callbacks for the given hook.
|
||
*
|
||
* The callback will be invoked when the hook it is registered for is run.
|
||
* Hooks are usually directly run by a highlight function but you can also run hooks yourself.
|
||
*
|
||
* One callback function can be registered to multiple hooks and the same hook multiple times.
|
||
*
|
||
* @param {string} name The name of the hook.
|
||
* @param {HookCallback} callback The callback function which is given environment variables.
|
||
* @public
|
||
*/
|
||
add: function (name, callback) {
|
||
var hooks = _.hooks.all;
|
||
|
||
hooks[name] = hooks[name] || [];
|
||
|
||
hooks[name].push(callback);
|
||
},
|
||
|
||
/**
|
||
* Runs a hook invoking all registered callbacks with the given environment variables.
|
||
*
|
||
* Callbacks will be invoked synchronously and in the order in which they were registered.
|
||
*
|
||
* @param {string} name The name of the hook.
|
||
* @param {Object<string, any>} env The environment variables of the hook passed to all callbacks registered.
|
||
* @public
|
||
*/
|
||
run: function (name, env) {
|
||
var callbacks = _.hooks.all[name];
|
||
|
||
if (!callbacks || !callbacks.length) {
|
||
return;
|
||
}
|
||
|
||
for (var i = 0, callback; (callback = callbacks[i++]);) {
|
||
callback(env);
|
||
}
|
||
}
|
||
},
|
||
|
||
Token: Token
|
||
};
|
||
_self.Prism = _;
|
||
|
||
|
||
// Typescript note:
|
||
// The following can be used to import the Token type in JSDoc:
|
||
//
|
||
// @typedef {InstanceType<import("./prism-core")["Token"]>} Token
|
||
|
||
/**
|
||
* Creates a new token.
|
||
*
|
||
* @param {string} type See {@link Token#type type}
|
||
* @param {string | TokenStream} content See {@link Token#content content}
|
||
* @param {string|string[]} [alias] The alias(es) of the token.
|
||
* @param {string} [matchedStr=""] A copy of the full string this token was created from.
|
||
* @class
|
||
* @global
|
||
* @public
|
||
*/
|
||
function Token(type, content, alias, matchedStr) {
|
||
/**
|
||
* The type of the token.
|
||
*
|
||
* This is usually the key of a pattern in a {@link Grammar}.
|
||
*
|
||
* @type {string}
|
||
* @see GrammarToken
|
||
* @public
|
||
*/
|
||
this.type = type;
|
||
/**
|
||
* The strings or tokens contained by this token.
|
||
*
|
||
* This will be a token stream if the pattern matched also defined an `inside` grammar.
|
||
*
|
||
* @type {string | TokenStream}
|
||
* @public
|
||
*/
|
||
this.content = content;
|
||
/**
|
||
* The alias(es) of the token.
|
||
*
|
||
* @type {string|string[]}
|
||
* @see GrammarToken
|
||
* @public
|
||
*/
|
||
this.alias = alias;
|
||
// Copy of the full string this token was created from
|
||
this.length = (matchedStr || '').length | 0;
|
||
}
|
||
|
||
/**
|
||
* A token stream is an array of strings and {@link Token Token} objects.
|
||
*
|
||
* Token streams have to fulfill a few properties that are assumed by most functions (mostly internal ones) that process
|
||
* them.
|
||
*
|
||
* 1. No adjacent strings.
|
||
* 2. No empty strings.
|
||
*
|
||
* The only exception here is the token stream that only contains the empty string and nothing else.
|
||
*
|
||
* @typedef {Array<string | Token>} TokenStream
|
||
* @global
|
||
* @public
|
||
*/
|
||
|
||
/**
|
||
* Converts the given token or token stream to an HTML representation.
|
||
*
|
||
* The following hooks will be run:
|
||
* 1. `wrap`: On each {@link Token}.
|
||
*
|
||
* @param {string | Token | TokenStream} o The token or token stream to be converted.
|
||
* @param {string} language The name of current language.
|
||
* @returns {string} The HTML representation of the token or token stream.
|
||
* @memberof Token
|
||
* @static
|
||
*/
|
||
Token.stringify = function stringify(o, language) {
|
||
if (typeof o == 'string') {
|
||
return o;
|
||
}
|
||
if (Array.isArray(o)) {
|
||
var s = '';
|
||
o.forEach(function (e) {
|
||
s += stringify(e, language);
|
||
});
|
||
return s;
|
||
}
|
||
|
||
var env = {
|
||
type: o.type,
|
||
content: stringify(o.content, language),
|
||
tag: 'span',
|
||
classes: ['token', o.type],
|
||
attributes: {},
|
||
language: language
|
||
};
|
||
|
||
var aliases = o.alias;
|
||
if (aliases) {
|
||
if (Array.isArray(aliases)) {
|
||
Array.prototype.push.apply(env.classes, aliases);
|
||
} else {
|
||
env.classes.push(aliases);
|
||
}
|
||
}
|
||
|
||
_.hooks.run('wrap', env);
|
||
|
||
var attributes = '';
|
||
for (var name in env.attributes) {
|
||
attributes += ' ' + name + '="' + (env.attributes[name] || '').replace(/"/g, '"') + '"';
|
||
}
|
||
|
||
return '<' + env.tag + ' class="' + env.classes.join(' ') + '"' + attributes + '>' + env.content + '</' + env.tag + '>';
|
||
};
|
||
|
||
/**
|
||
* @param {RegExp} pattern
|
||
* @param {number} pos
|
||
* @param {string} text
|
||
* @param {boolean} lookbehind
|
||
* @returns {RegExpExecArray | null}
|
||
*/
|
||
function matchPattern(pattern, pos, text, lookbehind) {
|
||
pattern.lastIndex = pos;
|
||
var match = pattern.exec(text);
|
||
if (match && lookbehind && match[1]) {
|
||
// change the match to remove the text matched by the Prism lookbehind group
|
||
var lookbehindLength = match[1].length;
|
||
match.index += lookbehindLength;
|
||
match[0] = match[0].slice(lookbehindLength);
|
||
}
|
||
return match;
|
||
}
|
||
|
||
/**
|
||
* @param {string} text
|
||
* @param {LinkedList<string | Token>} tokenList
|
||
* @param {any} grammar
|
||
* @param {LinkedListNode<string | Token>} startNode
|
||
* @param {number} startPos
|
||
* @param {RematchOptions} [rematch]
|
||
* @returns {void}
|
||
* @private
|
||
*
|
||
* @typedef RematchOptions
|
||
* @property {string} cause
|
||
* @property {number} reach
|
||
*/
|
||
function matchGrammar(text, tokenList, grammar, startNode, startPos, rematch) {
|
||
for (var token in grammar) {
|
||
if (!grammar.hasOwnProperty(token) || !grammar[token]) {
|
||
continue;
|
||
}
|
||
|
||
var patterns = grammar[token];
|
||
patterns = Array.isArray(patterns) ? patterns : [patterns];
|
||
|
||
for (var j = 0; j < patterns.length; ++j) {
|
||
if (rematch && rematch.cause == token + ',' + j) {
|
||
return;
|
||
}
|
||
|
||
var patternObj = patterns[j];
|
||
var inside = patternObj.inside;
|
||
var lookbehind = !!patternObj.lookbehind;
|
||
var greedy = !!patternObj.greedy;
|
||
var alias = patternObj.alias;
|
||
|
||
if (greedy && !patternObj.pattern.global) {
|
||
// Without the global flag, lastIndex won't work
|
||
var flags = patternObj.pattern.toString().match(/[imsuy]*$/)[0];
|
||
patternObj.pattern = RegExp(patternObj.pattern.source, flags + 'g');
|
||
}
|
||
|
||
/** @type {RegExp} */
|
||
var pattern = patternObj.pattern || patternObj;
|
||
|
||
for ( // iterate the token list and keep track of the current token/string position
|
||
var currentNode = startNode.next, pos = startPos;
|
||
currentNode !== tokenList.tail;
|
||
pos += currentNode.value.length, currentNode = currentNode.next
|
||
) {
|
||
|
||
if (rematch && pos >= rematch.reach) {
|
||
break;
|
||
}
|
||
|
||
var str = currentNode.value;
|
||
|
||
if (tokenList.length > text.length) {
|
||
// Something went terribly wrong, ABORT, ABORT!
|
||
return;
|
||
}
|
||
|
||
if (str instanceof Token) {
|
||
continue;
|
||
}
|
||
|
||
var removeCount = 1; // this is the to parameter of removeBetween
|
||
var match;
|
||
|
||
if (greedy) {
|
||
match = matchPattern(pattern, pos, text, lookbehind);
|
||
if (!match || match.index >= text.length) {
|
||
break;
|
||
}
|
||
|
||
var from = match.index;
|
||
var to = match.index + match[0].length;
|
||
var p = pos;
|
||
|
||
// find the node that contains the match
|
||
p += currentNode.value.length;
|
||
while (from >= p) {
|
||
currentNode = currentNode.next;
|
||
p += currentNode.value.length;
|
||
}
|
||
// adjust pos (and p)
|
||
p -= currentNode.value.length;
|
||
pos = p;
|
||
|
||
// the current node is a Token, then the match starts inside another Token, which is invalid
|
||
if (currentNode.value instanceof Token) {
|
||
continue;
|
||
}
|
||
|
||
// find the last node which is affected by this match
|
||
for (
|
||
var k = currentNode;
|
||
k !== tokenList.tail && (p < to || typeof k.value === 'string');
|
||
k = k.next
|
||
) {
|
||
removeCount++;
|
||
p += k.value.length;
|
||
}
|
||
removeCount--;
|
||
|
||
// replace with the new match
|
||
str = text.slice(pos, p);
|
||
match.index -= pos;
|
||
} else {
|
||
match = matchPattern(pattern, 0, str, lookbehind);
|
||
if (!match) {
|
||
continue;
|
||
}
|
||
}
|
||
|
||
// eslint-disable-next-line no-redeclare
|
||
var from = match.index;
|
||
var matchStr = match[0];
|
||
var before = str.slice(0, from);
|
||
var after = str.slice(from + matchStr.length);
|
||
|
||
var reach = pos + str.length;
|
||
if (rematch && reach > rematch.reach) {
|
||
rematch.reach = reach;
|
||
}
|
||
|
||
var removeFrom = currentNode.prev;
|
||
|
||
if (before) {
|
||
removeFrom = addAfter(tokenList, removeFrom, before);
|
||
pos += before.length;
|
||
}
|
||
|
||
removeRange(tokenList, removeFrom, removeCount);
|
||
|
||
var wrapped = new Token(token, inside ? _.tokenize(matchStr, inside) : matchStr, alias, matchStr);
|
||
currentNode = addAfter(tokenList, removeFrom, wrapped);
|
||
|
||
if (after) {
|
||
addAfter(tokenList, currentNode, after);
|
||
}
|
||
|
||
if (removeCount > 1) {
|
||
// at least one Token object was removed, so we have to do some rematching
|
||
// this can only happen if the current pattern is greedy
|
||
|
||
/** @type {RematchOptions} */
|
||
var nestedRematch = {
|
||
cause: token + ',' + j,
|
||
reach: reach
|
||
};
|
||
matchGrammar(text, tokenList, grammar, currentNode.prev, pos, nestedRematch);
|
||
|
||
// the reach might have been extended because of the rematching
|
||
if (rematch && nestedRematch.reach > rematch.reach) {
|
||
rematch.reach = nestedRematch.reach;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/**
|
||
* @typedef LinkedListNode
|
||
* @property {T} value
|
||
* @property {LinkedListNode<T> | null} prev The previous node.
|
||
* @property {LinkedListNode<T> | null} next The next node.
|
||
* @template T
|
||
* @private
|
||
*/
|
||
|
||
/**
|
||
* @template T
|
||
* @private
|
||
*/
|
||
function LinkedList() {
|
||
/** @type {LinkedListNode<T>} */
|
||
var head = { value: null, prev: null, next: null };
|
||
/** @type {LinkedListNode<T>} */
|
||
var tail = { value: null, prev: head, next: null };
|
||
head.next = tail;
|
||
|
||
/** @type {LinkedListNode<T>} */
|
||
this.head = head;
|
||
/** @type {LinkedListNode<T>} */
|
||
this.tail = tail;
|
||
this.length = 0;
|
||
}
|
||
|
||
/**
|
||
* Adds a new node with the given value to the list.
|
||
*
|
||
* @param {LinkedList<T>} list
|
||
* @param {LinkedListNode<T>} node
|
||
* @param {T} value
|
||
* @returns {LinkedListNode<T>} The added node.
|
||
* @template T
|
||
*/
|
||
function addAfter(list, node, value) {
|
||
// assumes that node != list.tail && values.length >= 0
|
||
var next = node.next;
|
||
|
||
var newNode = { value: value, prev: node, next: next };
|
||
node.next = newNode;
|
||
next.prev = newNode;
|
||
list.length++;
|
||
|
||
return newNode;
|
||
}
|
||
/**
|
||
* Removes `count` nodes after the given node. The given node will not be removed.
|
||
*
|
||
* @param {LinkedList<T>} list
|
||
* @param {LinkedListNode<T>} node
|
||
* @param {number} count
|
||
* @template T
|
||
*/
|
||
function removeRange(list, node, count) {
|
||
var next = node.next;
|
||
for (var i = 0; i < count && next !== list.tail; i++) {
|
||
next = next.next;
|
||
}
|
||
node.next = next;
|
||
next.prev = node;
|
||
list.length -= i;
|
||
}
|
||
/**
|
||
* @param {LinkedList<T>} list
|
||
* @returns {T[]}
|
||
* @template T
|
||
*/
|
||
function toArray(list) {
|
||
var array = [];
|
||
var node = list.head.next;
|
||
while (node !== list.tail) {
|
||
array.push(node.value);
|
||
node = node.next;
|
||
}
|
||
return array;
|
||
}
|
||
|
||
|
||
if (!_self.document) {
|
||
if (!_self.addEventListener) {
|
||
// in Node.js
|
||
return _;
|
||
}
|
||
|
||
if (!_.disableWorkerMessageHandler) {
|
||
// In worker
|
||
_self.addEventListener('message', function (evt) {
|
||
var message = JSON.parse(evt.data);
|
||
var lang = message.language;
|
||
var code = message.code;
|
||
var immediateClose = message.immediateClose;
|
||
|
||
_self.postMessage(_.highlight(code, _.languages[lang], lang));
|
||
if (immediateClose) {
|
||
_self.close();
|
||
}
|
||
}, false);
|
||
}
|
||
|
||
return _;
|
||
}
|
||
|
||
// Get current script and highlight
|
||
var script = _.util.currentScript();
|
||
|
||
if (script) {
|
||
_.filename = script.src;
|
||
|
||
if (script.hasAttribute('data-manual')) {
|
||
_.manual = true;
|
||
}
|
||
}
|
||
|
||
function highlightAutomaticallyCallback() {
|
||
if (!_.manual) {
|
||
_.highlightAll();
|
||
}
|
||
}
|
||
|
||
if (!_.manual) {
|
||
// If the document state is "loading", then we'll use DOMContentLoaded.
|
||
// If the document state is "interactive" and the prism.js script is deferred, then we'll also use the
|
||
// DOMContentLoaded event because there might be some plugins or languages which have also been deferred and they
|
||
// might take longer one animation frame to execute which can create a race condition where only some plugins have
|
||
// been loaded when Prism.highlightAll() is executed, depending on how fast resources are loaded.
|
||
// See https://github.com/PrismJS/prism/issues/2102
|
||
var readyState = document.readyState;
|
||
if (readyState === 'loading' || readyState === 'interactive' && script && script.defer) {
|
||
document.addEventListener('DOMContentLoaded', highlightAutomaticallyCallback);
|
||
} else {
|
||
if (window.requestAnimationFrame) {
|
||
window.requestAnimationFrame(highlightAutomaticallyCallback);
|
||
} else {
|
||
window.setTimeout(highlightAutomaticallyCallback, 16);
|
||
}
|
||
}
|
||
}
|
||
|
||
return _;
|
||
|
||
}(_self));
|
||
|
||
if (typeof module !== 'undefined' && module.exports) {
|
||
module.exports = Prism;
|
||
}
|
||
|
||
// hack for components to work correctly in node.js
|
||
if (typeof global !== 'undefined') {
|
||
global.Prism = Prism;
|
||
}
|
||
|
||
// some additional documentation/types
|
||
|
||
/**
|
||
* The expansion of a simple `RegExp` literal to support additional properties.
|
||
*
|
||
* @typedef GrammarToken
|
||
* @property {RegExp} pattern The regular expression of the token.
|
||
* @property {boolean} [lookbehind=false] If `true`, then the first capturing group of `pattern` will (effectively)
|
||
* behave as a lookbehind group meaning that the captured text will not be part of the matched text of the new token.
|
||
* @property {boolean} [greedy=false] Whether the token is greedy.
|
||
* @property {string|string[]} [alias] An optional alias or list of aliases.
|
||
* @property {Grammar} [inside] The nested grammar of this token.
|
||
*
|
||
* The `inside` grammar will be used to tokenize the text value of each token of this kind.
|
||
*
|
||
* This can be used to make nested and even recursive language definitions.
|
||
*
|
||
* Note: This can cause infinite recursion. Be careful when you embed different languages or even the same language into
|
||
* each another.
|
||
* @global
|
||
* @public
|
||
*/
|
||
|
||
/**
|
||
* @typedef Grammar
|
||
* @type {Object<string, RegExp | GrammarToken | Array<RegExp | GrammarToken>>}
|
||
* @property {Grammar} [rest] An optional grammar object that will be appended to this grammar.
|
||
* @global
|
||
* @public
|
||
*/
|
||
|
||
/**
|
||
* A function which will invoked after an element was successfully highlighted.
|
||
*
|
||
* @callback HighlightCallback
|
||
* @param {Element} element The element successfully highlighted.
|
||
* @returns {void}
|
||
* @global
|
||
* @public
|
||
*/
|
||
|
||
/**
|
||
* @callback HookCallback
|
||
* @param {Object<string, any>} env The environment variables of the hook.
|
||
* @returns {void}
|
||
* @global
|
||
* @public
|
||
*/
|