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Go.dev Code Highlight

Golang code highlighter

当前为 2023-12-19 提交的版本，查看 最新版本。

  1. // ==UserScript==
  2. // @name         Go.dev Code Highlight
  3. // @version      1.1.5
  4. // @description  Golang code highlighter
  5. // @author       Anton Vi
  6. // @match        https://*.go.dev/*
  7. // @resource     IMPORTED_CSS  https://cdnjs.cloudflare.com/ajax/libs/prism/1.29.0/themes/prism-tomorrow.min.css
  8. // @grant        GM_getResourceText
  9. // @grant        GM_addStyle
  10. // @license      GNU GPLv3
  11. // @namespace GolangDevNamespace
  12. // ==/UserScript==
  13.  
  14. (function() {
  15.  
  16.     'use strict';
  17.  
  18.     document.addEventListener('readystatechange', (e) => {
  19.         if (e.target.readyState === 'complete') {
  20.             resetBlogCss();
  21.             start();
  22.         }
  23.     })
  24.  
  25.  
  26. })();
  27.  
  28. function resetBlogCss() {
  29.     // reset styles for go dev blog
  30.     let css = `#blog pre, #content .code, #content .playground {
  31.         background: black; 
  32.         font-family: Consolas,Monaco,'Andale Mono','Ubuntu Mono',monospace;
  33.         font-size: 1rem;
  34.     }`;
  35.     GM_addStyle(css);
  36.  
  37. }
  38.  
  39. function start() {
  40.     // create Prisma object
  41.     window.Prism = window.Prism || {};
  42.     // no highlight on auto
  43.     Prism.manual = true;
  44.  
  45.     // add highlight styles css
  46.     const my_css = GM_getResourceText("IMPORTED_CSS");
  47.     GM_addStyle(my_css);
  48.  
  49.     // start prism
  50.     initPrismCore();
  51.  
  52.     // add languages syntax
  53.     addClikeSyntax();
  54.     addGoSyntax();
  55.  
  56.  
  57.     // loop pre-s and add code child elements for highlight
  58.     let pre_s = document.getElementsByTagName('pre');
  59.     for (let el of pre_s) {
  60.         // skip pre element for ==Output== code run in documentation
  61.         if (el.getElementsByClassName('Documentation-exampleOutputLabel').length > 0) {
  62.             continue;
  63.         }
  64.  
  65.  
  66.         if (!el.getElementsByTagName('code').length > 0) {
  67.             let text = el.innerHTML;
  68.             el.innerHTML = '';
  69.  
  70.             let code = document.createElement('code');
  71.             code.innerHTML = text;
  72.             code.className = 'language-go';
  73.             el.appendChild(code);
  74.         }
  75.  
  76.     }
  77.  
  78.  
  79.     // get examples in go library doc
  80.     let divS = document.getElementsByClassName('Documentation-exampleDetailsBody');
  81.     for (divEl of divS) {
  82.         let outputPre = divEl.getElementsByTagName('pre')[0];
  83.         outputPre.className = 'language-go';
  84.  
  85.  
  86.         let textareaBlock = divEl.querySelector('textarea.Documentation-exampleCode.code');
  87.         textareaBlock.style.display = 'none';
  88.         // textareaBlock.remove();
  89.         divEl.insertAdjacentHTML('afterbegin', '<pre class="language-go"><code>' + textareaBlock.value + '</code></pre>');
  90.  
  91.  
  92.     }
  93.  
  94.  
  95.     // start highlight syntax
  96.     Prism.highlightAll();
  97.  
  98. }
  99.  
  100. function initPrismCore() {
  101.     var _self = "undefined" != typeof window ? window : "undefined" != typeof WorkerGlobalScope && self instanceof WorkerGlobalScope ? self : {},
  102.         Prism = function(e) {
  103.             var n = /(?:^|\s)lang(?:uage)?-([\w-]+)(?=\s|$)/i,
  104.                 t = 0,
  105.                 r = {},
  106.                 a = {
  107.                     manual: e.Prism && e.Prism.manual,
  108.                     disableWorkerMessageHandler: e.Prism && e.Prism.disableWorkerMessageHandler,
  109.                     util: {
  110.                         encode: function e(n) { return n instanceof i ? new i(n.type, e(n.content), n.alias) : Array.isArray(n) ? n.map(e) : n.replace(/&/g, "&amp;").replace(/</g, "&lt;").replace(/\u00a0/g, " ") },
  111.                         type: function(e) { return Object.prototype.toString.call(e).slice(8, -1) },
  112.                         objId: function(e) { return e.__id || Object.defineProperty(e, "__id", { value: ++t }), e.__id },
  113.                         clone: function e(n, t) {
  114.                             var r, i;
  115.                             switch (t = t || {}, a.util.type(n)) {
  116.                                 case "Object":
  117.                                     if (i = a.util.objId(n), t[i]) return t[i];
  118.                                     for (var l in r = {}, t[i] = r, n) n.hasOwnProperty(l) && (r[l] = e(n[l], t));
  119.                                     return r;
  120.                                 case "Array":
  121.                                     return i = a.util.objId(n), t[i] ? t[i] : (r = [], t[i] = r, n.forEach((function(n, a) { r[a] = e(n, t) })), r);
  122.                                 default:
  123.                                     return n
  124.                             }
  125.                         },
  126.                         getLanguage: function(e) {
  127.                             for (; e;) {
  128.                                 var t = n.exec(e.className);
  129.                                 if (t) return t[1].toLowerCase();
  130.                                 e = e.parentElement
  131.                             }
  132.                             return "none"
  133.                         },
  134.                         setLanguage: function(e, t) { e.className = e.className.replace(RegExp(n, "gi"), ""), e.classList.add("language-" + t) },
  135.                         currentScript: function() {
  136.                             if ("undefined" == typeof document) return null;
  137.                             if ("currentScript" in document) return document.currentScript;
  138.                             try { throw new Error } catch (r) {
  139.                                 var e = (/at [^(\r\n]*\((.*):[^:]+:[^:]+\)$/i.exec(r.stack) || [])[1];
  140.                                 if (e) {
  141.                                     var n = document.getElementsByTagName("script");
  142.                                     for (var t in n)
  143.                                         if (n[t].src == e) return n[t]
  144.                                 }
  145.                                 return null
  146.                             }
  147.                         },
  148.                         isActive: function(e, n, t) {
  149.                             for (var r = "no-" + n; e;) {
  150.                                 var a = e.classList;
  151.                                 if (a.contains(n)) return !0;
  152.                                 if (a.contains(r)) return !1;
  153.                                 e = e.parentElement
  154.                             }
  155.                             return !!t
  156.                         }
  157.                     },
  158.                     languages: {
  159.                         plain: r,
  160.                         plaintext: r,
  161.                         text: r,
  162.                         txt: r,
  163.                         extend: function(e, n) { var t = a.util.clone(a.languages[e]); for (var r in n) t[r] = n[r]; return t },
  164.                         insertBefore: function(e, n, t, r) {
  165.                             var i = (r = r || a.languages)[e],
  166.                                 l = {};
  167.                             for (var o in i)
  168.                                 if (i.hasOwnProperty(o)) {
  169.                                     if (o == n)
  170.                                         for (var s in t) t.hasOwnProperty(s) && (l[s] = t[s]);
  171.                                     t.hasOwnProperty(o) || (l[o] = i[o])
  172.                                 } var u = r[e];
  173.                             return r[e] = l, a.languages.DFS(a.languages, (function(n, t) { t === u && n != e && (this[n] = l) })), l
  174.                         },
  175.                         DFS: function e(n, t, r, i) {
  176.                             i = i || {};
  177.                             var l = a.util.objId;
  178.                             for (var o in n)
  179.                                 if (n.hasOwnProperty(o)) {
  180.                                     t.call(n, o, n[o], r || o);
  181.                                     var s = n[o],
  182.                                         u = a.util.type(s);
  183.                                     "Object" !== u || i[l(s)] ? "Array" !== u || i[l(s)] || (i[l(s)] = !0, e(s, t, o, i)) : (i[l(s)] = !0, e(s, t, null, i))
  184.                                 }
  185.                         }
  186.                     },
  187.                     plugins: {},
  188.                     highlightAll: function(e, n) { a.highlightAllUnder(document, e, n) },
  189.                     highlightAllUnder: function(e, n, t) {
  190.                         var r = { callback: t, container: e, selector: 'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code' };
  191.                         a.hooks.run("before-highlightall", r), r.elements = Array.prototype.slice.apply(r.container.querySelectorAll(r.selector)), a.hooks.run("before-all-elements-highlight", r);
  192.                         for (var i, l = 0; i = r.elements[l++];) a.highlightElement(i, !0 === n, r.callback)
  193.                     },
  194.                     highlightElement: function(n, t, r) {
  195.                         var i = a.util.getLanguage(n),
  196.                             l = a.languages[i];
  197.                         a.util.setLanguage(n, i);
  198.                         var o = n.parentElement;
  199.                         o && "pre" === o.nodeName.toLowerCase() && a.util.setLanguage(o, i);
  200.                         var s = { element: n, language: i, grammar: l, code: n.textContent };
  201.  
  202.                         function u(e) { s.highlightedCode = e, a.hooks.run("before-insert", s), s.element.innerHTML = s.highlightedCode, a.hooks.run("after-highlight", s), a.hooks.run("complete", s), r && r.call(s.element) }
  203.                         if (a.hooks.run("before-sanity-check", s), (o = s.element.parentElement) && "pre" === o.nodeName.toLowerCase() && !o.hasAttribute("tabindex") && o.setAttribute("tabindex", "0"), !s.code) return a.hooks.run("complete", s), void(r && r.call(s.element));
  204.                         if (a.hooks.run("before-highlight", s), s.grammar)
  205.                             if (t && e.Worker) {
  206.                                 var c = new Worker(a.filename);
  207.                                 c.onmessage = function(e) { u(e.data) }, c.postMessage(JSON.stringify({ language: s.language, code: s.code, immediateClose: !0 }))
  208.                             } else u(a.highlight(s.code, s.grammar, s.language));
  209.                         else u(a.util.encode(s.code))
  210.                     },
  211.                     highlight: function(e, n, t) { var r = { code: e, grammar: n, language: t }; if (a.hooks.run("before-tokenize", r), !r.grammar) throw new Error('The language "' + r.language + '" has no grammar.'); return r.tokens = a.tokenize(r.code, r.grammar), a.hooks.run("after-tokenize", r), i.stringify(a.util.encode(r.tokens), r.language) },
  212.                     tokenize: function(e, n) {
  213.                         var t = n.rest;
  214.                         if (t) {
  215.                             for (var r in t) n[r] = t[r];
  216.                             delete n.rest
  217.                         }
  218.                         var a = new s;
  219.                         return u(a, a.head, e), o(e, a, n, a.head, 0),
  220.                             function(e) { for (var n = [], t = e.head.next; t !== e.tail;) n.push(t.value), t = t.next; return n }(a)
  221.                     },
  222.                     hooks: {
  223.                         all: {},
  224.                         add: function(e, n) {
  225.                             var t = a.hooks.all;
  226.                             t[e] = t[e] || [], t[e].push(n)
  227.                         },
  228.                         run: function(e, n) {
  229.                             var t = a.hooks.all[e];
  230.                             if (t && t.length)
  231.                                 for (var r, i = 0; r = t[i++];) r(n)
  232.                         }
  233.                     },
  234.                     Token: i
  235.                 };
  236.  
  237.             function i(e, n, t, r) { this.type = e, this.content = n, this.alias = t, this.length = 0 | (r || "").length }
  238.  
  239.             function l(e, n, t, r) {
  240.                 e.lastIndex = n;
  241.                 var a = e.exec(t);
  242.                 if (a && r && a[1]) {
  243.                     var i = a[1].length;
  244.                     a.index += i, a[0] = a[0].slice(i)
  245.                 }
  246.                 return a
  247.             }
  248.  
  249.             function o(e, n, t, r, s, g) {
  250.                 for (var f in t)
  251.                     if (t.hasOwnProperty(f) && t[f]) {
  252.                         var h = t[f];
  253.                         h = Array.isArray(h) ? h : [h];
  254.                         for (var d = 0; d < h.length; ++d) {
  255.                             if (g && g.cause == f + "," + d) return;
  256.                             var v = h[d],
  257.                                 p = v.inside,
  258.                                 m = !!v.lookbehind,
  259.                                 y = !!v.greedy,
  260.                                 k = v.alias;
  261.                             if (y && !v.pattern.global) {
  262.                                 var x = v.pattern.toString().match(/[imsuy]*$/)[0];
  263.                                 v.pattern = RegExp(v.pattern.source, x + "g")
  264.                             }
  265.                             for (var b = v.pattern || v, w = r.next, A = s; w !== n.tail && !(g && A >= g.reach); A += w.value.length, w = w.next) {
  266.                                 var E = w.value;
  267.                                 if (n.length > e.length) return;
  268.                                 if (!(E instanceof i)) {
  269.                                     var P, L = 1;
  270.                                     if (y) {
  271.                                         if (!(P = l(b, A, e, m)) || P.index >= e.length) break;
  272.                                         var S = P.index,
  273.                                             O = P.index + P[0].length,
  274.                                             j = A;
  275.                                         for (j += w.value.length; S >= j;) j += (w = w.next).value.length;
  276.                                         if (A = j -= w.value.length, w.value instanceof i) continue;
  277.                                         for (var C = w; C !== n.tail && (j < O || "string" == typeof C.value); C = C.next) L++, j += C.value.length;
  278.                                         L--, E = e.slice(A, j), P.index -= A
  279.                                     } else if (!(P = l(b, 0, E, m))) continue;
  280.                                     S = P.index;
  281.                                     var N = P[0],
  282.                                         _ = E.slice(0, S),
  283.                                         M = E.slice(S + N.length),
  284.                                         W = A + E.length;
  285.                                     g && W > g.reach && (g.reach = W);
  286.                                     var z = w.prev;
  287.                                     if (_ && (z = u(n, z, _), A += _.length), c(n, z, L), w = u(n, z, new i(f, p ? a.tokenize(N, p) : N, k, N)), M && u(n, w, M), L > 1) {
  288.                                         var I = { cause: f + "," + d, reach: W };
  289.                                         o(e, n, t, w.prev, A, I), g && I.reach > g.reach && (g.reach = I.reach)
  290.                                     }
  291.                                 }
  292.                             }
  293.                         }
  294.                     }
  295.             }
  296.  
  297.             function s() {
  298.                 var e = { value: null, prev: null, next: null },
  299.                     n = { value: null, prev: e, next: null };
  300.                 e.next = n, this.head = e, this.tail = n, this.length = 0
  301.             }
  302.  
  303.             function u(e, n, t) {
  304.                 var r = n.next,
  305.                     a = { value: t, prev: n, next: r };
  306.                 return n.next = a, r.prev = a, e.length++, a
  307.             }
  308.  
  309.             function c(e, n, t) {
  310.                 for (var r = n.next, a = 0; a < t && r !== e.tail; a++) r = r.next;
  311.                 n.next = r, r.prev = n, e.length -= a
  312.             }
  313.             if (e.Prism = a, i.stringify = function e(n, t) {
  314.                     if ("string" == typeof n) return n;
  315.                     if (Array.isArray(n)) { var r = ""; return n.forEach((function(n) { r += e(n, t) })), r }
  316.                     var i = { type: n.type, content: e(n.content, t), tag: "span", classes: ["token", n.type], attributes: {}, language: t },
  317.                         l = n.alias;
  318.                     l && (Array.isArray(l) ? Array.prototype.push.apply(i.classes, l) : i.classes.push(l)), a.hooks.run("wrap", i);
  319.                     var o = "";
  320.                     for (var s in i.attributes) o += " " + s + '="' + (i.attributes[s] || "").replace(/"/g, "&quot;") + '"';
  321.                     return "<" + i.tag + ' class="' + i.classes.join(" ") + '"' + o + ">" + i.content + "</" + i.tag + ">"
  322.                 }, !e.document) return e.addEventListener ? (a.disableWorkerMessageHandler || e.addEventListener("message", (function(n) {
  323.                 var t = JSON.parse(n.data),
  324.                     r = t.language,
  325.                     i = t.code,
  326.                     l = t.immediateClose;
  327.                 e.postMessage(a.highlight(i, a.languages[r], r)), l && e.close()
  328.             }), !1), a) : a;
  329.             var g = a.util.currentScript();
  330.  
  331.             function f() { a.manual || a.highlightAll() }
  332.             if (g && (a.filename = g.src, g.hasAttribute("data-manual") && (a.manual = !0)), !a.manual) { var h = document.readyState; "loading" === h || "interactive" === h && g && g.defer ? document.addEventListener("DOMContentLoaded", f) : window.requestAnimationFrame ? window.requestAnimationFrame(f) : window.setTimeout(f, 16) }
  333.             return a
  334.         }(_self);
  335.     "undefined" != typeof module && module.exports && (module.exports = Prism), "undefined" != typeof global && (global.Prism = Prism);
  336. }
  337.  
  338. function addClikeSyntax() {
  339.     Prism.languages.clike = {
  340.         comment: [{ pattern: /(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/, lookbehind: !0, greedy: !0 },
  341.             { pattern: /(^|[^\\:])\/\/.*/, lookbehind: !0, greedy: !0 }
  342.         ],
  343.         string: { pattern: /(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/, greedy: !0 },
  344.         "class-name": { pattern: /(\b(?:class|extends|implements|instanceof|interface|new|trait)\s+|\bcatch\s+\()[\w.\\]+/i, lookbehind: !0, inside: { punctuation: /[.\\]/ } },
  345.         keyword: /\b(?:break|catch|continue|do|else|finally|for|function|if|in|instanceof|new|null|return|throw|try|while)\b/,
  346.         boolean: /\b(?:false|true)\b/,
  347.         function: /\b\w+(?=\()/,
  348.         number: /\b0x[\da-f]+\b|(?:\b\d+(?:\.\d*)?|\B\.\d+)(?:e[+-]?\d+)?/i,
  349.         operator: /[<>]=?|[!=]=?=?|--?|\+\+?|&&?|\|\|?|[?*/~^%]/,
  350.         punctuation: /[{}[\];(),.:]/
  351.     };
  352. }
  353.  
  354. function addGoSyntax() {
  355.     Prism.languages.go = Prism.languages
  356.         .extend("clike", {
  357.             string: { pattern: /(^|[^\\])"(?:\\.|[^"\\\r\n])*"|`[^`]*`/, lookbehind: !0, greedy: !0 },
  358.             keyword: /\b(?:break|case|chan|const|continue|default|defer|else|fallthrough|for|func|go(?:to)?|if|import|interface|map|package|range|return|select|struct|switch|type|var)\b/,
  359.             boolean: /\b(?:_|false|iota|nil|true)\b/,
  360.             number: [/\b0(?:b[01_]+|o[0-7_]+)i?\b/i, /\b0x(?:[a-f\d_]+(?:\.[a-f\d_]*)?|\.[a-f\d_]+)(?:p[+-]?\d+(?:_\d+)*)?i?(?!\w)/i, /(?:\b\d[\d_]*(?:\.[\d_]*)?|\B\.\d[\d_]*)(?:e[+-]?[\d_]+)?i?(?!\w)/i],
  361.             operator: /[*\/%^!=]=?|\+[=+]?|-[=-]?|\|[=|]?|&(?:=|&|\^=?)?|>(?:>=?|=)?|<(?:<=?|=|-)?|:=|\.\.\./,
  362.             builtin: /\b(?:append|bool|byte|cap|close|complex|complex(?:64|128)|copy|delete|error|float(?:32|64)|u?int(?:8|16|32|64)?|imag|len|make|new|panic|print(?:ln)?|real|recover|rune|string|uintptr)\b/
  363.         }),
  364.         Prism.languages.insertBefore("go", "string", { char: { pattern: /'(?:\\.|[^'\\\r\n]){0,10}'/, greedy: !0 } }), delete Prism.languages.go["class-name"];
  365. }