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GreasyFork Code: Syntax Highlight by PrismJS

To syntax highlight GreasyFork Code by PrismJS

As of 2025-06-04. See the latest version.

  1. // ==UserScript==
  2. // @name         GreasyFork Code: Syntax Highlight by PrismJS
  3. // @namespace    Violentmonkey Scripts
  4. // @grant        none
  5. // @version      0.4.3
  6. // @author       CY Fung
  7. // @description  To syntax highlight GreasyFork Code by PrismJS
  8. // @run-at       document-start
  9. // @inject-into  page
  10. // @unwrap
  11. // @license      MIT
  12. // @match        https://greatest.deepsurf.us/*
  13. // @match        https://sleazyfork.org/*
  14. //
  15. // ==/UserScript==
  16.  
  17. (() => {
  18.  
  19.     const USE_SHADOW_MODE = true; // performance fix for long coding
  20.  
  21.     const cdn = 'https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0';
  22.     const resoruces = {
  23.         'prism-core.js': `${cdn}/components/prism-core.js`,
  24.         'prism-clike.js': `${cdn}/components/prism-clike.min.js`,
  25.         'prism-javascript.js': `${cdn}/components/prism-javascript.min.js`,
  26.         'prism-css.js': `${cdn}/components/prism-css.min.js`,
  27.         'prism-stylus.js': `${cdn}/components/prism-stylus.min.js`,
  28.         'prism.css': `${cdn}/themes/prism.min.css`,
  29.         'prism-dark.css': `${cdn}/themes/prism-dark.min.css`,
  30.     }
  31.  
  32.     const doActionCSS = () => `
  33.  
  34.         .code-container, .code-container-shadow{
  35.             height:100vh;
  36.         }
  37.         .code-container .CodeMirror, .code-container textarea{
  38.             height:100%;
  39.         }
  40.     `;
  41.  
  42.  
  43.     const global_css = () =>`
  44.  
  45.         html {
  46.             line-height: 1.5;
  47.             -webkit-text-size-adjust: 100%;
  48.             -moz-tab-size: 4;
  49.             -o-tab-size: 4;
  50.             tab-size: 4;
  51.             font-family: ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji;
  52.             font-feature-settings: normal;
  53.             font-variation-settings: normal
  54.         }
  55.  
  56.         .code-container code, .code-container kbd, .code-container pre, .code-container samp,
  57.         .code-container-pre, .code-container-pre code, .code-container-pre pre {
  58.             font-family: ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,Liberation Mono,Courier New,monospace;
  59.             font-size: 1em
  60.         }
  61.  
  62.         #script-content > .code-container[class] {
  63.             width: 100%;
  64.         }
  65.  
  66.         .code-container[class], .code-container-shadow[class] {
  67.             border-radius: 0;
  68.         }
  69.  
  70.         .code-container > pre:only-child, .code-container-pre{
  71.             padding:0;
  72.         }
  73.  
  74.         pre.code-container-pre[class]{
  75.  
  76.             padding: 0;
  77.             border: 0;
  78.             margin: 0;
  79.         }
  80.  
  81.         code.syntax-highlighted[class] {
  82.             font-family: monospace;
  83.             font-size: 13px;
  84.             font-variant-ligatures: contextual;
  85.             line-height: 1.15rem;
  86.             text-shadow: none !important;
  87.         }
  88.  
  89.         .hljs-comment[class], .hljs-quote[class] {
  90.             font-style: inherit;
  91.             color: #259789;
  92.         }
  93.  
  94.         .hljs-add-marker-width .marker-fixed-width[class] {
  95.             user-select: none !important;
  96.             width: calc(var(--hljs-marker-width, 0em) + 16px);
  97.             background: var(--marker-color-background, #f4f4f4);
  98.             padding-right: 6px;
  99.             margin-right: 4px;
  100.             contain: paint style;
  101.             color: var(--marker-color-text, inherit);
  102.         }
  103.  
  104.         .marker-fixed-width[marker-text]::before {
  105.             content:attr(marker-text);
  106.         }
  107.  
  108.     `;
  109.  
  110.  
  111.     const cssForCodePage = () => /\/scripts\/\d+[^\s\/\\]*\/code(\/|$)/.test(location.href) ? `
  112.  
  113.         html:not([dkkfv]) div.code-container {
  114.             display:none;
  115.         }
  116.  
  117.         .code-container,
  118.         .code-container pre:only-child,
  119.         .code-container pre:only-child code:only-child,
  120.         .code-container-pre {
  121.             max-height: calc(100vh + 4px);
  122.             max-width: calc(100vw + 4px);
  123.         }
  124.     ` : '';
  125.  
  126.  
  127.     const cssAdd = () =>`
  128.  
  129.         ${global_css()}
  130.  
  131.         ${cssForCodePage()}
  132.  
  133.         .code-container, .code-container-shadow {
  134.             max-width: 100%;
  135.             display: inline-flex;
  136.             flex-direction: column;
  137.             overflow: auto;
  138.             border-radius: 8px;
  139.             max-height: 100%;
  140.             overflow: visible;
  141.         }
  142.         .code-container > pre:only-child, .code-container-pre {
  143.             max-width: 100%;
  144.             display: inline-flex;
  145.             flex-direction: column;
  146.             flex-grow: 1;
  147.             height: 0;
  148.         }
  149.         .code-container > pre:only-child > code:only-child, .code-container-pre > code:only-child{
  150.             max-width: 100%;
  151.             flex-grow: 1;
  152.             height: 0;
  153.         }
  154.         .code-container pre code, .code-container-pre code {
  155.             padding: 0;
  156.             font-family: Consolas;
  157.             cursor: text;
  158.             overflow: auto;
  159.             box-sizing: border-box;
  160.         }
  161.         .code-container pre code .marker, .code-container-pre code .marker {
  162.             display: inline-block;
  163.             color: #636d83;
  164.             text-align: right;
  165.             padding-right: 20px;
  166.             user-select: none;
  167.             cursor: auto;
  168.         }
  169.  
  170.         .code-container[contenteditable]{
  171.           outline: 0 !important;
  172.           contain: strict;
  173.           box-sizing: border-box;
  174.         }
  175.  
  176.         .code-container[contenteditable]>pre[contenteditable="false"]{
  177.           contain: strict;
  178.           width: initial;
  179.           box-sizing: border-box;
  180.         }
  181.  
  182.  
  183.  
  184.  
  185.         html {
  186.  
  187.         --token-color-keyword: #07a;
  188.         --token-color-punctuation: #1415ec;
  189.         --token-color-comment: #259789;
  190.         --token-color-function: #da204f;
  191.         --token-color-atrule: #700d0d;
  192.         --token-stylus-selector: #1373bb;
  193.         }
  194.  
  195.         [dark] {
  196.  
  197.         --token-color-keyword: #898af2;
  198.         --token-color-punctuation: #fadbdb;
  199.         --token-color-comment:#59c6b9;
  200.         --token-color-function: #e98aa2;
  201.         --token-color-atrule: #cc66ce;
  202.         --token-stylus-selector: #96c7ec;
  203.  
  204.         --marker-color-background: #242424;
  205.         --marker-color-text: #b6b2b2;
  206.  
  207.         }
  208.  
  209.  
  210.         code .token.comment {
  211.             color: var(--token-color-comment);
  212.         }
  213.  
  214.         code .token.atrule, code .token.attr-value, code .token.keyword {
  215.             color: #1415ec;
  216.             color: var(--token-color-keyword);
  217.         }
  218.  
  219.         code .token.punctuation{
  220.         color: var(--token-color-punctuation);
  221.         }
  222.  
  223.  
  224.         code .token.variable-declaration,
  225.         code  .token.variable {
  226.             color: #0d10cd;
  227.         }
  228.  
  229.         code .token.selector{
  230.         color: #1373bb;
  231.         }
  232.  
  233.  
  234.         code .token.function {
  235.             color:var(--token-color-function);
  236.         }
  237.  
  238.  
  239.  
  240.         .language-stylus .token.variable-declaration,
  241.         .language-stylus .token.variable {
  242.             color: #0d10cd;
  243.         }
  244.  
  245.         .language-stylus .token.selector{
  246.             color: #1373bb;
  247.             color: var(--token-stylus-selector);
  248.         }
  249.  
  250.         .language-stylus .token.punctuation{
  251.         color:#700d0d;
  252.         }
  253.  
  254.  
  255.         .language-stylus .token.function {
  256.         color:#da204f
  257.         }
  258.  
  259.  
  260.         code.language-stylus .token.atrule, 
  261.         code.language-stylus .token.attr-value, 
  262.         code.language-stylus .token.keyword,
  263.         code.language-stylus .token.punctuation,
  264.         code.language-stylus .token.function {
  265.             color: #700d0d;
  266.             color: var(--token-color-atrule);
  267.         }
  268.  
  269.         code.language-stylus .token.punctuation {
  270.             opacity: 1;
  271.         }
  272.  
  273.         code.language-stylus .property-declaration .operator {
  274.             color: inherit;
  275.         }
  276.  
  277.         .token, span.marker {
  278.             contain: content;
  279.         }
  280.  
  281.         .prettyprint.prettyprint {
  282.             background-color: transparent;
  283.         }
  284.  
  285.     `;
  286.  
  287.  
  288.     const Promise = (async function () { })().constructor;
  289.  
  290.     const delayPn = delay => new Promise((fn => setTimeout(fn, delay)));
  291.  
  292.     const PromiseExternal = ((resolve_, reject_) => {
  293.         const h = (resolve, reject) => { resolve_ = resolve; reject_ = reject };
  294.         return class PromiseExternal extends Promise {
  295.             constructor(cb = h) {
  296.                 super(cb);
  297.                 if (cb === h) {
  298.                     /** @type {(value: any) => void} */
  299.                     this.resolve = resolve_;
  300.                     /** @type {(reason?: any) => void} */
  301.                     this.reject = reject_;
  302.                 }
  303.             }
  304.         };
  305.     })();
  306.  
  307.     // -------- fix requestIdleCallback issue for long coding --------
  308.  
  309.     const pud = new PromiseExternal();
  310.     if (typeof window.requestIdleCallback === 'function' && !window.requestIdleCallback842 && window.requestIdleCallback.length === 1) {
  311.         window.requestIdleCallback842 = window.requestIdleCallback;
  312.         window.requestIdleCallback = function (callback, ...args) {
  313.             console.error(322)
  314.             return (this || window).requestIdleCallback842(async function () {
  315.                 await pud.then();
  316.                 setTimeout(()=>{
  317.                     callback.apply(this, arguments);
  318.                 });
  319.             }, ...args);
  320.         }
  321.     }
  322.  
  323.     // -------- fix requestIdleCallback issue for long coding --------
  324.  
  325.     const pScript = new PromiseExternal();
  326.     const pElementQuery = new PromiseExternal();
  327.  
  328.     HTMLElement.prototype.getElementsByTagName331 = HTMLElement.prototype.getElementsByTagName;
  329.     Document.prototype.getElementsByTagName331 = Document.prototype.getElementsByTagName;
  330.  
  331.     HTMLElement.prototype.getElementsByTagName = getElementsByTagName;
  332.     Document.prototype.getElementsByTagName = getElementsByTagName;
  333.  
  334.     let byPass = true;
  335.  
  336.     const observablePromise = (proc, timeoutPromise) => {
  337.         let promise = null;
  338.         return {
  339.             obtain() {
  340.                 if (!promise) {
  341.                     promise = new Promise(resolve => {
  342.                         let mo = null;
  343.                         const f = () => {
  344.                             let t = proc();
  345.                             if (t) {
  346.                                 mo.disconnect();
  347.                                 mo.takeRecords();
  348.                                 mo = null;
  349.                                 resolve(t);
  350.                             }
  351.                         }
  352.                         mo = new MutationObserver(f);
  353.                         mo.observe(document, { subtree: true, childList: true })
  354.                         f();
  355.                         timeoutPromise && timeoutPromise.then(() => {
  356.                             resolve(null)
  357.                         });
  358.                     });
  359.                 }
  360.                 return promise
  361.             }
  362.         }
  363.     }
  364.  
  365.     const documentReady = new Promise(resolve => {
  366.         Promise.resolve().then(() => {
  367.             if (document.readyState !== 'loading') {
  368.                 resolve();
  369.             } else {
  370.                 window.addEventListener("DOMContentLoaded", resolve, false);
  371.             }
  372.         });
  373.     });
  374.  
  375.     documentReady.then(async () => {
  376.         pud.resolve();
  377.     });
  378.  
  379.     function getElementsByTagName(tag) {
  380.         if (byPass) {
  381.             if (tag === 'pre' || tag === 'code' || tag === 'xmp') {
  382.                 if (location.pathname.endsWith('/code')) {
  383.                     pElementQuery.resolve();
  384.                     return [];
  385.                 }
  386.             }
  387.         }
  388.         return this.getElementsByTagName331(tag);
  389.     }
  390.  
  391.     async function onBodyHeadReadyAsync() {
  392.         await observablePromise(() => document.body && document.head).obtain();
  393.     }
  394.  
  395.  
  396.     // Load CSS
  397.     function loadJS(href) {
  398.  
  399.         return new Promise(resolve => {
  400.  
  401.             const script = document.createElement('script');
  402.             script.src = href;
  403.             script.onload = () => {
  404.                 resolve(script);
  405.             };
  406.             document.head.appendChild(script);
  407.  
  408.         });
  409.  
  410.     }
  411.  
  412.     // Load CSS
  413.     function loadCSS(href) {
  414.         const link = document.createElement('link');
  415.         link.rel = 'stylesheet';
  416.         link.href = href;
  417.         document.head.appendChild(link);
  418.         return link;
  419.     }
  420.  
  421.  
  422.  
  423.  
  424.  
  425.     function getLangClassName(pre, textContent){
  426.  
  427.  
  428.  
  429.         let className = '';
  430.         let preLang = '';
  431.  
  432.         if (pre.classList.contains('lang-js')) {
  433.             preLang = 'lang-js';
  434.         } else if (pre.classList.contains('lang-css')) {
  435.             preLang = 'lang-css';
  436.         } else if (pre.classList.contains('uglyprint')){
  437.             let m =/\/\/\s*={2,9}(\w+)={2,9}\s*[\r\n]/.exec(pre.textContent);
  438.             if(m){
  439.                 m = m[1];
  440.                 if(m === 'UserScript') preLang = 'lang-js';
  441.                 if(m === 'UserStyle') preLang = 'lang-css';
  442.             }
  443.         }
  444.  
  445.         if (preLang === 'lang-js') {
  446.             className = 'language-javascript';
  447.         } else if (preLang === 'lang-css') {
  448.  
  449.             const text = textContent;
  450.             let m = /\n@preprocessor\s+([-_a-zA-Z]{3,8})\s*\n/.exec(text);
  451.             className = 'language-css'
  452.             if (m) {
  453.                 const preprocessor = m[1];
  454.                 if (preprocessor === 'stylus') {
  455.                     className = 'language-stylus';
  456.                 } else if (preprocessor === 'uso') {
  457.                     className = 'language-stylus';
  458.                 } else if (preprocessor === 'less') {
  459.                     className = 'language-less';
  460.                 } else if (preprocessor === 'default') {
  461.                     className = 'language-stylus';
  462.                 } else {
  463.                     className = 'language-stylus';
  464.                 }
  465.             }
  466.  
  467.         }
  468.  
  469.         return className;
  470.  
  471.  
  472.     }
  473.  
  474.     /** @param {HTMLElement} pre */
  475.     function prepareCodeAreaAsync(pre) {
  476.  
  477.         if (pre.isConnected === false) return;
  478.         const preParentNode = pre.parentNode;
  479.         const preNextNode = pre.nextSibling;
  480.  
  481.         const codeContainer = pre.closest('.code-container');
  482.         const doContentEditable = codeContainer && codeContainer.querySelector('.code-container>pre:only-child');
  483.  
  484.         pre.remove();
  485.  
  486.         for (const li of pre.querySelectorAll('li')) {
  487.             li.append(document.createTextNode('\n'));
  488.         }
  489.  
  490.         const textContent = pre.textContent;
  491.  
  492.         const className = getLangClassName(pre, textContent);
  493.  
  494.         if (!className) return;
  495.  
  496.         if (doContentEditable) {
  497.             // avoid selection to the outside by mouse dragging
  498.             codeContainer.setAttribute('contenteditable', '');
  499.             pre.setAttribute('contenteditable', 'false');
  500.         }
  501.  
  502.         const code = document.createElement('code');
  503.  
  504.         code.classList.add(className);
  505.         code.classList.add('syntax-highlighted')
  506.  
  507.         let htmlCode = '';
  508.  
  509.         if (className === 'language-javascript') {
  510.             htmlCode = Prism.highlight(textContent, Prism.languages.javascript, 'javascript');
  511.         } else if (className === 'language-stylus') {
  512.             htmlCode = Prism.highlight(textContent, Prism.languages.stylus, 'stylus');
  513.         } else if (className === 'language-less') {
  514.             htmlCode = Prism.highlight(textContent, Prism.languages.less, 'less');
  515.         } else {
  516.             htmlCode = Prism.highlight(textContent, Prism.languages.css, 'css');
  517.         }
  518.  
  519.         // Adding line numbers
  520.         htmlCode = htmlCode || '';
  521.         const htmlSplit = htmlCode ? htmlCode.split('\n') : [];
  522.         const totalLines = htmlSplit.length;
  523.  
  524.         let mwStyle = '';
  525.  
  526.         if (totalLines >= 1) {
  527.             code.classList.add('hljs-add-marker-width');
  528.             const len = `${totalLines}`.length * 0.5;
  529.             mwStyle = `${len}em`;
  530.             htmlCode = htmlSplit.map((n, i) => `<span class="marker marker-fixed-width" marker-text="${i + 1}"></span>${n}`).join('\n') || '';
  531.  
  532.         } else {
  533.  
  534.             code.classList.remove('hljs-add-marker-width');
  535.         }
  536.  
  537.         code.innerHTML = htmlCode;
  538.         code.style.setProperty('--hljs-marker-width', mwStyle);
  539.  
  540.  
  541.  
  542.         if(pre.firstChild === pre.lastChild && pre.firstChild instanceof Node){
  543.             pre.firstChild.replaceWith(code);
  544.         }else{
  545.             pre.innerHTML = '';
  546.             pre.appendChild(code);
  547.         }
  548.         pre.classList.add('code-container-pre');
  549.  
  550.  
  551.         if(USE_SHADOW_MODE){
  552.  
  553.             const shadowDiv = document.createElement("div");
  554.             shadowDiv.classList.add('code-container-shadow')
  555.  
  556.             const shadow = shadowDiv.attachShadow({ mode: "open" });
  557.  
  558.             const styles = document.querySelectorAll('link, style');
  559.             for(style of styles) {
  560.                 if(style.classList.contains("stylus")) continue;
  561.                 if(style.nodeName === 'LINK' && style.rel !== 'stylesheet') continue;
  562.                 shadow.appendChild(style.cloneNode(true))
  563.             }
  564.  
  565.             shadow.appendChild(pre)
  566.             preParentNode.insertBefore(shadowDiv, preNextNode);
  567.         }else{
  568.  
  569.             preParentNode.insertBefore(pre, preNextNode);
  570.         }
  571.  
  572.  
  573.  
  574.  
  575.     }
  576.  
  577.     const documentBodyHeadReady = onBodyHeadReadyAsync();
  578.  
  579.     documentBodyHeadReady.then(async () => {
  580.  
  581.         if (!location.pathname.endsWith('/code')) {
  582.             return;
  583.         }
  584.  
  585.         document.head.appendChild(document.createElement('style')).textContent = `${cssAdd()}`;
  586.  
  587.         self.Prism = self.Prism || {};
  588.         self.Prism.manual = true;
  589.         await loadJS(resoruces['prism-core.js']);
  590.         await loadJS(resoruces['prism-clike.js']);
  591.         await loadJS(resoruces['prism-javascript.js']);
  592.         await loadJS(resoruces['prism-css.js']);
  593.         await loadJS(resoruces['prism-stylus.js']);
  594.  
  595.         if (document.documentElement.hasAttribute('dark')) {
  596.  
  597.             loadCSS(resoruces['prism-dark.css']);
  598.         } else {
  599.  
  600.             loadCSS(resoruces['prism.css']);
  601.         }
  602.  
  603.         pScript.resolve();
  604.  
  605.  
  606.  
  607.  
  608.     });
  609.  
  610.     let keydownActive = false;
  611.  
  612.     documentReady.then(async () => {
  613.  
  614.         if (!location.pathname.endsWith('/code')) {
  615.             byPass = false;
  616.             return;
  617.         }
  618.         await pScript.then();
  619.  
  620.         await Promise.race([pElementQuery, delayPn(800)]);
  621.  
  622.         const targets = document.querySelectorAll('.code-container pre.lang-js, .code-container pre.lang-css, .code-container pre.uglyprint');
  623.         // pre.uglyprint : too long code ; see https://greatest.deepsurf.us/zh-CN/scripts/24204-picviewer-ce/code
  624.  
  625.         if (targets.length === 0) return;
  626.  
  627.         await delayPn(40);
  628.  
  629.         document.head.appendChild(document.createElement('style')).textContent = doActionCSS();
  630.  
  631.         await delayPn(40);
  632.  
  633.         byPass = false;
  634.  
  635.         // Code highlighting
  636.         const promises = [...targets].map(prepareCodeAreaAsync)
  637.         await Promise.all(promises);
  638.  
  639.         await delayPn(40);
  640.         document.documentElement.setAttribute('dkkfv', '');
  641.         keydownActive = true;
  642.  
  643.     });
  644.  
  645.     function selectAllWithinElement(element) {
  646.         window.getSelection().removeAllRanges();
  647.         let range = document.createRange();
  648.         if (element) {
  649.             range.selectNodeContents(element);
  650.             window.getSelection().addRange(range);
  651.         } else {
  652.             console.error('Element not found with ID:', element);
  653.         }
  654.     }
  655.     document.addEventListener('keydown', (e) => {
  656.         if (keydownActive && e && e.code === 'KeyA' && e.isTrusted && (e.metaKey || e.ctrlKey) && !e.shiftKey && !e.altKey) {
  657.  
  658.             const target = e.target;
  659.             const container = target ? target.closest('div.code-container') : null;
  660.             const code = container ? container.querySelector('code') : null;
  661.  
  662.             if (container && code) {
  663.  
  664.                 e.preventDefault();
  665.                 e.stopPropagation();
  666.                 e.stopImmediatePropagation();
  667.  
  668.                 setTimeout(() => {
  669.                     selectAllWithinElement(code);
  670.                 }, 1)
  671.  
  672.             }
  673.  
  674.         }
  675.     }, true);
  676.  
  677.  
  678. })();