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pegjs.js (3577B)

      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"), require("../javascript/javascript"));
      7   else if (typeof define == "function" && define.amd) // AMD
      8     define(["../../lib/codemirror", "../javascript/javascript"], mod);
      9   else // Plain browser env
     10     mod(CodeMirror);
     11 })(function(CodeMirror) {
     12 "use strict";
     13 
     14 CodeMirror.defineMode("pegjs", function (config) {
     15   var jsMode = CodeMirror.getMode(config, "javascript");
     16 
     17   function identifier(stream) {
     18     return stream.match(/^[a-zA-Z_][a-zA-Z0-9_]*/);
     19   }
     20 
     21   return {
     22     startState: function () {
     23       return {
     24         inString: false,
     25         stringType: null,
     26         inComment: false,
     27         inCharacterClass: false,
     28         braced: 0,
     29         lhs: true,
     30         localState: null
     31       };
     32     },
     33     token: function (stream, state) {
     34       if (stream)
     35 
     36       //check for state changes
     37       if (!state.inString && !state.inComment && ((stream.peek() == '"') || (stream.peek() == "'"))) {
     38         state.stringType = stream.peek();
     39         stream.next(); // Skip quote
     40         state.inString = true; // Update state
     41       }
     42       if (!state.inString && !state.inComment && stream.match(/^\/\*/)) {
     43         state.inComment = true;
     44       }
     45 
     46       //return state
     47       if (state.inString) {
     48         while (state.inString && !stream.eol()) {
     49           if (stream.peek() === state.stringType) {
     50             stream.next(); // Skip quote
     51             state.inString = false; // Clear flag
     52           } else if (stream.peek() === '\\') {
     53             stream.next();
     54             stream.next();
     55           } else {
     56             stream.match(/^.[^\\\"\']*/);
     57           }
     58         }
     59         return state.lhs ? "property string" : "string"; // Token style
     60       } else if (state.inComment) {
     61         while (state.inComment && !stream.eol()) {
     62           if (stream.match(/\*\//)) {
     63             state.inComment = false; // Clear flag
     64           } else {
     65             stream.match(/^.[^\*]*/);
     66           }
     67         }
     68         return "comment";
     69       } else if (state.inCharacterClass) {
     70           while (state.inCharacterClass && !stream.eol()) {
     71             if (!(stream.match(/^[^\]\\]+/) || stream.match(/^\\./))) {
     72               state.inCharacterClass = false;
     73             }
     74           }
     75       } else if (stream.peek() === '[') {
     76         stream.next();
     77         state.inCharacterClass = true;
     78         return 'bracket';
     79       } else if (stream.match(/^\/\//)) {
     80         stream.skipToEnd();
     81         return "comment";
     82       } else if (state.braced || stream.peek() === '{') {
     83         if (state.localState === null) {
     84           state.localState = CodeMirror.startState(jsMode);
     85         }
     86         var token = jsMode.token(stream, state.localState);
     87         var text = stream.current();
     88         if (!token) {
     89           for (var i = 0; i < text.length; i++) {
     90             if (text[i] === '{') {
     91               state.braced++;
     92             } else if (text[i] === '}') {
     93               state.braced--;
     94             }
     95           };
     96         }
     97         return token;
     98       } else if (identifier(stream)) {
     99         if (stream.peek() === ':') {
    100           return 'variable';
    101         }
    102         return 'variable-2';
    103       } else if (['[', ']', '(', ')'].indexOf(stream.peek()) != -1) {
    104         stream.next();
    105         return 'bracket';
    106       } else if (!stream.eatSpace()) {
    107         stream.next();
    108       }
    109       return null;
    110     }
    111   };
    112 }, "javascript");
    113 
    114 });