106 lines
2.5 KiB
JavaScript
106 lines
2.5 KiB
JavaScript
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(function () {
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if (typeof self === 'undefined' || !self.Prism || !self.document || !document.querySelector) {
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return;
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}
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/**
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* @param {Element} [container=document]
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*/
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self.Prism.fileHighlight = function(container) {
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container = container || document;
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var Extensions = {
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'js': 'javascript',
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'py': 'python',
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'rb': 'ruby',
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'ps1': 'powershell',
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'psm1': 'powershell',
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'sh': 'bash',
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'bat': 'batch',
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'h': 'c',
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'tex': 'latex'
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};
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Array.prototype.slice.call(container.querySelectorAll('pre[data-src]')).forEach(function (pre) {
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// ignore if already loaded
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if (pre.hasAttribute('data-src-loaded')) {
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return;
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}
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// load current
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var src = pre.getAttribute('data-src');
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var language, parent = pre;
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var lang = /\blang(?:uage)?-([\w-]+)\b/i;
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while (parent && !lang.test(parent.className)) {
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parent = parent.parentNode;
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}
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if (parent) {
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language = (pre.className.match(lang) || [, ''])[1];
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}
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if (!language) {
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var extension = (src.match(/\.(\w+)$/) || [, ''])[1];
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language = Extensions[extension] || extension;
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}
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var code = document.createElement('code');
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code.className = 'language-' + language;
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pre.textContent = '';
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code.textContent = 'Loading…';
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pre.appendChild(code);
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var xhr = new XMLHttpRequest();
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xhr.open('GET', src, true);
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xhr.onreadystatechange = function () {
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if (xhr.readyState == 4) {
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if (xhr.status < 400 && xhr.responseText) {
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code.textContent = xhr.responseText;
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Prism.highlightElement(code);
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// mark as loaded
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pre.setAttribute('data-src-loaded', '');
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}
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else if (xhr.status >= 400) {
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code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
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}
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else {
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code.textContent = '✖ Error: File does not exist or is empty';
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}
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}
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};
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xhr.send(null);
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});
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if (Prism.plugins.toolbar) {
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Prism.plugins.toolbar.registerButton('download-file', function (env) {
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var pre = env.element.parentNode;
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if (!pre || !/pre/i.test(pre.nodeName) || !pre.hasAttribute('data-src') || !pre.hasAttribute('data-download-link')) {
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return;
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}
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var src = pre.getAttribute('data-src');
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var a = document.createElement('a');
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a.textContent = pre.getAttribute('data-download-link-label') || 'Download';
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a.setAttribute('download', '');
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a.href = src;
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return a;
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});
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}
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};
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document.addEventListener('DOMContentLoaded', function () {
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// execute inside handler, for dropping Event as argumnet
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self.Prism.fileHighlight();
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});
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})();
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