622 lines
15 KiB
JavaScript
622 lines
15 KiB
JavaScript
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
|
||
* MIT license http://www.opensource.org/licenses/mit-license.php/
|
||
* @author Lea Verou http://lea.verou.me
|
||
*/
|
||
|
||
var Prism = (function (_self){
|
||
|
||
// Private helper vars
|
||
var lang = /\blang(?:uage)?-([\w-]+)\b/i;
|
||
var uniqueId = 0;
|
||
|
||
|
||
var _ = {
|
||
manual: _self.Prism && _self.Prism.manual,
|
||
disableWorkerMessageHandler: _self.Prism && _self.Prism.disableWorkerMessageHandler,
|
||
util: {
|
||
encode: function (tokens) {
|
||
if (tokens instanceof Token) {
|
||
return new Token(tokens.type, _.util.encode(tokens.content), tokens.alias);
|
||
} else if (Array.isArray(tokens)) {
|
||
return tokens.map(_.util.encode);
|
||
} else {
|
||
return tokens.replace(/&/g, '&').replace(/</g, '<').replace(/\u00a0/g, ' ');
|
||
}
|
||
},
|
||
|
||
type: function (o) {
|
||
return Object.prototype.toString.call(o).slice(8, -1);
|
||
},
|
||
|
||
objId: function (obj) {
|
||
if (!obj['__id']) {
|
||
Object.defineProperty(obj, '__id', { value: ++uniqueId });
|
||
}
|
||
return obj['__id'];
|
||
},
|
||
|
||
// Deep clone a language definition (e.g. to extend it)
|
||
clone: function deepClone(o, visited) {
|
||
var clone, id, type = _.util.type(o);
|
||
visited = visited || {};
|
||
|
||
switch (type) {
|
||
case 'Object':
|
||
id = _.util.objId(o);
|
||
if (visited[id]) {
|
||
return visited[id];
|
||
}
|
||
clone = {};
|
||
visited[id] = clone;
|
||
|
||
for (var key in o) {
|
||
if (o.hasOwnProperty(key)) {
|
||
clone[key] = deepClone(o[key], visited);
|
||
}
|
||
}
|
||
|
||
return clone;
|
||
|
||
case 'Array':
|
||
id = _.util.objId(o);
|
||
if (visited[id]) {
|
||
return visited[id];
|
||
}
|
||
clone = [];
|
||
visited[id] = clone;
|
||
|
||
o.forEach(function (v, i) {
|
||
clone[i] = deepClone(v, visited);
|
||
});
|
||
|
||
return 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 && !lang.test(element.className)) {
|
||
element = element.parentElement;
|
||
}
|
||
if (element) {
|
||
return (element.className.match(lang) || [, 'none'])[1].toLowerCase();
|
||
}
|
||
return 'none';
|
||
},
|
||
|
||
/**
|
||
* 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) {
|
||
return 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;
|
||
}
|
||
}
|
||
},
|
||
|
||
languages: {
|
||
extend: function (id, redef) {
|
||
var lang = _.util.clone(_.languages[id]);
|
||
|
||
for (var key in redef) {
|
||
lang[key] = redef[key];
|
||
}
|
||
|
||
return lang;
|
||
},
|
||
|
||
/**
|
||
* Insert a token before another token in a language literal
|
||
* As this needs to recreate the object (we cannot actually insert before keys in object literals),
|
||
* we cannot just provide an object, we need an object and a key.
|
||
* @param inside The key (or language id) of the parent
|
||
* @param before The key to insert before.
|
||
* @param insert Object with the key/value pairs to insert
|
||
* @param root The object that contains `inside`. If equal to Prism.languages, it can be omitted.
|
||
*/
|
||
insertBefore: function (inside, before, insert, root) {
|
||
root = root || _.languages;
|
||
var grammar = root[inside];
|
||
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],
|
||
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: {},
|
||
|
||
highlightAll: function(async, callback) {
|
||
_.highlightAllUnder(document, async, callback);
|
||
},
|
||
|
||
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);
|
||
}
|
||
},
|
||
|
||
highlightElement: function(element, async, callback) {
|
||
// Find language
|
||
var language = _.util.getLanguage(element);
|
||
var grammar = _.languages[language];
|
||
|
||
// Set language on the element, if not present
|
||
element.className = element.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + language;
|
||
|
||
// Set language on the parent, for styling
|
||
var parent = element.parentNode;
|
||
if (parent && parent.nodeName.toLowerCase() === 'pre') {
|
||
parent.className = parent.className.replace(lang, '').replace(/\s+/g, ' ') + ' language-' + 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);
|
||
|
||
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));
|
||
}
|
||
},
|
||
|
||
highlight: function (text, grammar, language) {
|
||
var env = {
|
||
code: text,
|
||
grammar: grammar,
|
||
language: language
|
||
};
|
||
_.hooks.run('before-tokenize', env);
|
||
env.tokens = _.tokenize(env.code, env.grammar);
|
||
_.hooks.run('after-tokenize', env);
|
||
return Token.stringify(_.util.encode(env.tokens), env.language);
|
||
},
|
||
|
||
matchGrammar: function (text, strarr, grammar, index, startPos, oneshot, target) {
|
||
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 (target && target == token + ',' + j) {
|
||
return;
|
||
}
|
||
|
||
var pattern = patterns[j],
|
||
inside = pattern.inside,
|
||
lookbehind = !!pattern.lookbehind,
|
||
greedy = !!pattern.greedy,
|
||
lookbehindLength = 0,
|
||
alias = pattern.alias;
|
||
|
||
if (greedy && !pattern.pattern.global) {
|
||
// Without the global flag, lastIndex won't work
|
||
var flags = pattern.pattern.toString().match(/[imsuy]*$/)[0];
|
||
pattern.pattern = RegExp(pattern.pattern.source, flags + 'g');
|
||
}
|
||
|
||
pattern = pattern.pattern || pattern;
|
||
|
||
// Don’t cache length as it changes during the loop
|
||
for (var i = index, pos = startPos; i < strarr.length; pos += strarr[i].length, ++i) {
|
||
|
||
var str = strarr[i];
|
||
|
||
if (strarr.length > text.length) {
|
||
// Something went terribly wrong, ABORT, ABORT!
|
||
return;
|
||
}
|
||
|
||
if (str instanceof Token) {
|
||
continue;
|
||
}
|
||
|
||
if (greedy && i != strarr.length - 1) {
|
||
pattern.lastIndex = pos;
|
||
var match = pattern.exec(text);
|
||
if (!match) {
|
||
break;
|
||
}
|
||
|
||
var from = match.index + (lookbehind && match[1] ? match[1].length : 0),
|
||
to = match.index + match[0].length,
|
||
k = i,
|
||
p = pos;
|
||
|
||
for (var len = strarr.length; k < len && (p < to || (!strarr[k].type && !strarr[k - 1].greedy)); ++k) {
|
||
p += strarr[k].length;
|
||
// Move the index i to the element in strarr that is closest to from
|
||
if (from >= p) {
|
||
++i;
|
||
pos = p;
|
||
}
|
||
}
|
||
|
||
// If strarr[i] is a Token, then the match starts inside another Token, which is invalid
|
||
if (strarr[i] instanceof Token) {
|
||
continue;
|
||
}
|
||
|
||
// Number of tokens to delete and replace with the new match
|
||
delNum = k - i;
|
||
str = text.slice(pos, p);
|
||
match.index -= pos;
|
||
} else {
|
||
pattern.lastIndex = 0;
|
||
|
||
var match = pattern.exec(str),
|
||
delNum = 1;
|
||
}
|
||
|
||
if (!match) {
|
||
if (oneshot) {
|
||
break;
|
||
}
|
||
|
||
continue;
|
||
}
|
||
|
||
if(lookbehind) {
|
||
lookbehindLength = match[1] ? match[1].length : 0;
|
||
}
|
||
|
||
var from = match.index + lookbehindLength,
|
||
match = match[0].slice(lookbehindLength),
|
||
to = from + match.length,
|
||
before = str.slice(0, from),
|
||
after = str.slice(to);
|
||
|
||
var args = [i, delNum];
|
||
|
||
if (before) {
|
||
++i;
|
||
pos += before.length;
|
||
args.push(before);
|
||
}
|
||
|
||
var wrapped = new Token(token, inside? _.tokenize(match, inside) : match, alias, match, greedy);
|
||
|
||
args.push(wrapped);
|
||
|
||
if (after) {
|
||
args.push(after);
|
||
}
|
||
|
||
Array.prototype.splice.apply(strarr, args);
|
||
|
||
if (delNum != 1)
|
||
_.matchGrammar(text, strarr, grammar, i, pos, true, token + ',' + j);
|
||
|
||
if (oneshot)
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
},
|
||
|
||
tokenize: function(text, grammar) {
|
||
var strarr = [text];
|
||
|
||
var rest = grammar.rest;
|
||
|
||
if (rest) {
|
||
for (var token in rest) {
|
||
grammar[token] = rest[token];
|
||
}
|
||
|
||
delete grammar.rest;
|
||
}
|
||
|
||
_.matchGrammar(text, strarr, grammar, 0, 0, false);
|
||
|
||
return strarr;
|
||
},
|
||
|
||
hooks: {
|
||
all: {},
|
||
|
||
add: function (name, callback) {
|
||
var hooks = _.hooks.all;
|
||
|
||
hooks[name] = hooks[name] || [];
|
||
|
||
hooks[name].push(callback);
|
||
},
|
||
|
||
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 = _;
|
||
|
||
function Token(type, content, alias, matchedStr, greedy) {
|
||
this.type = type;
|
||
this.content = content;
|
||
this.alias = alias;
|
||
// Copy of the full string this token was created from
|
||
this.length = (matchedStr || '').length|0;
|
||
this.greedy = !!greedy;
|
||
}
|
||
|
||
Token.stringify = function(o, language) {
|
||
if (typeof o == 'string') {
|
||
return o;
|
||
}
|
||
|
||
if (Array.isArray(o)) {
|
||
return o.map(function(element) {
|
||
return Token.stringify(element, language);
|
||
}).join('');
|
||
}
|
||
|
||
var env = {
|
||
type: o.type,
|
||
content: Token.stringify(o.content, language),
|
||
tag: 'span',
|
||
classes: ['token', o.type],
|
||
attributes: {},
|
||
language: language
|
||
};
|
||
|
||
if (o.alias) {
|
||
var aliases = Array.isArray(o.alias) ? o.alias : [o.alias];
|
||
Array.prototype.push.apply(env.classes, aliases);
|
||
}
|
||
|
||
_.hooks.run('wrap', env);
|
||
|
||
var attributes = Object.keys(env.attributes).map(function(name) {
|
||
return name + '="' + (env.attributes[name] || '').replace(/"/g, '"') + '"';
|
||
}).join(' ');
|
||
|
||
return '<' + env.tag + ' class="' + env.classes.join(' ') + '"' + (attributes ? ' ' + attributes : '') + '>' + env.content + '</' + env.tag + '>';
|
||
};
|
||
|
||
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),
|
||
lang = message.language,
|
||
code = message.code,
|
||
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;
|
||
}
|
||
}
|
||
|
||
if (!_.manual) {
|
||
function highlightAutomaticallyCallback() {
|
||
if (!_.manual) {
|
||
_.highlightAll();
|
||
}
|
||
}
|
||
|
||
// 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;
|
||
}
|