JAVASCRIPT   37

go.js

Guest on 23rd August 2021 10:28:33 AM

  1. // CodeMirror, copyright (c) by Marijn Haverbeke and others
  2. // Distributed under an MIT license: http://codemirror.net/LICENSE
  3.  
  4. (function(mod) {
  5.   if (typeof exports == "object" && typeof module == "object") // CommonJS
  6.     mod(require("../../lib/codemirror"));
  7.   else if (typeof define == "function" && define.amd) // AMD
  8.     define(["../../lib/codemirror"], mod);
  9.   else // Plain browser env
  10.     mod(CodeMirror);
  11. })(function(CodeMirror) {
  12. "use strict";
  13.  
  14. CodeMirror.defineMode("go", function(config) {
  15.   var indentUnit = config.indentUnit;
  16.  
  17.   var keywords = {
  18.     "break":true, "case":true, "chan":true, "const":true, "continue":true,
  19.     "default":true, "defer":true, "else":true, "fallthrough":true, "for":true,
  20.     "func":true, "go":true, "goto":true, "if":true, "import":true,
  21.     "interface":true, "map":true, "package":true, "range":true, "return":true,
  22.     "select":true, "struct":true, "switch":true, "type":true, "var":true,
  23.     "bool":true, "byte":true, "complex64":true, "complex128":true,
  24.     "float32":true, "float64":true, "int8":true, "int16":true, "int32":true,
  25.     "int64":true, "string":true, "uint8":true, "uint16":true, "uint32":true,
  26.     "uint64":true, "int":true, "uint":true, "uintptr":true, "error": true
  27.   };
  28.  
  29.   var atoms = {
  30.     "true":true, "false":true, "iota":true, "nil":true, "append":true,
  31.     "cap":true, "close":true, "complex":true, "copy":true, "imag":true,
  32.     "len":true, "make":true, "new":true, "panic":true, "print":true,
  33.     "println":true, "real":true, "recover":true
  34.   };
  35.  
  36.   var isOperatorChar = /[+\-*&^%:=<>!|\/]/;
  37.  
  38.   var curPunc;
  39.  
  40.   function tokenBase(stream, state) {
  41.     var ch = stream.next();
  42.     if (ch == '"' || ch == "'" || ch == "`") {
  43.       state.tokenize = tokenString(ch);
  44.       return state.tokenize(stream, state);
  45.     }
  46.     if (/[\d\.]/.test(ch)) {
  47.       if (ch == ".") {
  48.         stream.match(/^[0-9]+([eE][\-+]?[0-9]+)?/);
  49.       } else if (ch == "0") {
  50.         stream.match(/^[xX][0-9a-fA-F]+/) || stream.match(/^0[0-7]+/);
  51.       } else {
  52.         stream.match(/^[0-9]*\.?[0-9]*([eE][\-+]?[0-9]+)?/);
  53.       }
  54.       return "number";
  55.     }
  56.     if (/[\[\]{}\(\),;\:\.]/.test(ch)) {
  57.       curPunc = ch;
  58.       return null;
  59.     }
  60.     if (ch == "/") {
  61.       if (stream.eat("*")) {
  62.         state.tokenize = tokenComment;
  63.         return tokenComment(stream, state);
  64.       }
  65.       if (stream.eat("/")) {
  66.         stream.skipToEnd();
  67.         return "comment";
  68.       }
  69.     }
  70.     if (isOperatorChar.test(ch)) {
  71.       stream.eatWhile(isOperatorChar);
  72.       return "operator";
  73.     }
  74.     stream.eatWhile(/[\w\$_\xa1-\uffff]/);
  75.     var cur = stream.current();
  76.     if (keywords.propertyIsEnumerable(cur)) {
  77.       if (cur == "case" || cur == "default") curPunc = "case";
  78.       return "keyword";
  79.     }
  80.     if (atoms.propertyIsEnumerable(cur)) return "atom";
  81.     return "variable";
  82.   }
  83.  
  84.   function tokenString(quote) {
  85.     return function(stream, state) {
  86.       var escaped = false, next, end = false;
  87.       while ((next = stream.next()) != null) {
  88.         if (next == quote && !escaped) {end = true; break;}
  89.         escaped = !escaped && quote != "`" && next == "\\";
  90.       }
  91.       if (end || !(escaped || quote == "`"))
  92.         state.tokenize = tokenBase;
  93.       return "string";
  94.     };
  95.   }
  96.  
  97.   function tokenComment(stream, state) {
  98.     var maybeEnd = false, ch;
  99.     while (ch = stream.next()) {
  100.       if (ch == "/" && maybeEnd) {
  101.         state.tokenize = tokenBase;
  102.         break;
  103.       }
  104.       maybeEnd = (ch == "*");
  105.     }
  106.     return "comment";
  107.   }
  108.  
  109.   function Context(indented, column, type, align, prev) {
  110.     this.indented = indented;
  111.     this.column = column;
  112.     this.type = type;
  113.     this.align = align;
  114.     this.prev = prev;
  115.   }
  116.   function pushContext(state, col, type) {
  117.     return state.context = new Context(state.indented, col, type, null, state.context);
  118.   }
  119.   function popContext(state) {
  120.     if (!state.context.prev) return;
  121.     var t = state.context.type;
  122.     if (t == ")" || t == "]" || t == "}")
  123.       state.indented = state.context.indented;
  124.     return state.context = state.context.prev;
  125.   }
  126.  
  127.   // Interface
  128.  
  129.   return {
  130.     startState: function(basecolumn) {
  131.       return {
  132.         tokenize: null,
  133.         context: new Context((basecolumn || 0) - indentUnit, 0, "top", false),
  134.         indented: 0,
  135.         startOfLine: true
  136.       };
  137.     },
  138.  
  139.     token: function(stream, state) {
  140.       var ctx = state.context;
  141.       if (stream.sol()) {
  142.         if (ctx.align == null) ctx.align = false;
  143.         state.indented = stream.indentation();
  144.         state.startOfLine = true;
  145.         if (ctx.type == "case") ctx.type = "}";
  146.       }
  147.       if (stream.eatSpace()) return null;
  148.       curPunc = null;
  149.       var style = (state.tokenize || tokenBase)(stream, state);
  150.       if (style == "comment") return style;
  151.       if (ctx.align == null) ctx.align = true;
  152.  
  153.       if (curPunc == "{") pushContext(state, stream.column(), "}");
  154.       else if (curPunc == "[") pushContext(state, stream.column(), "]");
  155.       else if (curPunc == "(") pushContext(state, stream.column(), ")");
  156.       else if (curPunc == "case") ctx.type = "case";
  157.       else if (curPunc == "}" && ctx.type == "}") ctx = popContext(state);
  158.       else if (curPunc == ctx.type) popContext(state);
  159.       state.startOfLine = false;
  160.       return style;
  161.     },
  162.  
  163.     indent: function(state, textAfter) {
  164.       if (state.tokenize != tokenBase && state.tokenize != null) return 0;
  165.       var ctx = state.context, firstChar = textAfter && textAfter.charAt(0);
  166.       if (ctx.type == "case" && /^(?:case|default)\b/.test(textAfter)) {
  167.         state.context.type = "}";
  168.         return ctx.indented;
  169.       }
  170.       var closing = firstChar == ctx.type;
  171.       if (ctx.align) return ctx.column + (closing ? 0 : 1);
  172.       else return ctx.indented + (closing ? 0 : indentUnit);
  173.     },
  174.  
  175.     electricChars: "{}):",
  176.     fold: "brace",
  177.     blockCommentStart: "/*",
  178.     blockCommentEnd: "*/",
  179.     lineComment: "//"
  180.   };
  181. });
  182.  
  183. CodeMirror.defineMIME("text/x-go", "go");
  184.  
  185. });

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