94 lines
2.3 KiB
JavaScript
94 lines
2.3 KiB
JavaScript
(function () {
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if (typeof Prism === 'undefined') {
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return;
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}
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var autoLinkerProcess = function (grammar) {
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if (Prism.plugins.autolinker) {
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Prism.plugins.autolinker.processGrammar(grammar);
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}
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return grammar;
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};
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var dataURI = {
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pattern: /(.)\bdata:[^\/]+\/[^,]+,(?:(?!\1)[\s\S]|\\\1)+(?=\1)/,
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lookbehind: true,
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inside: {
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'language-css': {
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pattern: /(data:[^\/]+\/(?:[^+,]+\+)?css,)[\s\S]+/,
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lookbehind: true
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},
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'language-javascript': {
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pattern: /(data:[^\/]+\/(?:[^+,]+\+)?javascript,)[\s\S]+/,
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lookbehind: true
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},
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'language-json': {
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pattern: /(data:[^\/]+\/(?:[^+,]+\+)?json,)[\s\S]+/,
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lookbehind: true
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},
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'language-markup': {
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pattern: /(data:[^\/]+\/(?:[^+,]+\+)?(?:html|xml),)[\s\S]+/,
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lookbehind: true
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}
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}
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};
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// Tokens that may contain URLs
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var candidates = ['url', 'attr-value', 'string'];
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Prism.plugins.dataURIHighlight = {
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processGrammar: function (grammar) {
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// Abort if grammar has already been processed
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if (!grammar || grammar['data-uri']) {
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return;
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}
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Prism.languages.DFS(grammar, function (key, def, type) {
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if (candidates.indexOf(type) > -1 && !Array.isArray(def)) {
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if (!def.pattern) {
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def = this[key] = {
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pattern: def
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};
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}
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def.inside = def.inside || {};
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if (type == 'attr-value') {
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Prism.languages.insertBefore('inside', def.inside['url-link'] ? 'url-link' : 'punctuation', {
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'data-uri': dataURI
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}, def);
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} else {
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if (def.inside['url-link']) {
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Prism.languages.insertBefore('inside', 'url-link', {
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'data-uri': dataURI
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}, def);
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} else {
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def.inside['data-uri'] = dataURI;
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}
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}
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}
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});
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grammar['data-uri'] = dataURI;
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}
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};
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Prism.hooks.add('before-highlight', function (env) {
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// Prepare the needed grammars for this code block
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if (dataURI.pattern.test(env.code)) {
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for (var p in dataURI.inside) {
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if (dataURI.inside.hasOwnProperty(p)) {
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if (!dataURI.inside[p].inside && dataURI.inside[p].pattern.test(env.code)) {
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var lang = p.match(/^language-(.+)/)[1];
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if (Prism.languages[lang]) {
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dataURI.inside[p].inside = {
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rest: autoLinkerProcess(Prism.languages[lang])
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};
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}
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}
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}
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}
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}
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Prism.plugins.dataURIHighlight.processGrammar(env.grammar);
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});
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}());
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