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sieve.js (4284B)

      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("sieve", function(config) {
     15   function words(str) {
     16     var obj = {}, words = str.split(" ");
     17     for (var i = 0; i < words.length; ++i) obj[words[i]] = true;
     18     return obj;
     19   }
     20 
     21   var keywords = words("if elsif else stop require");
     22   var atoms = words("true false not");
     23   var indentUnit = config.indentUnit;
     24 
     25   function tokenBase(stream, state) {
     26 
     27     var ch = stream.next();
     28     if (ch == "/" && stream.eat("*")) {
     29       state.tokenize = tokenCComment;
     30       return tokenCComment(stream, state);
     31     }
     32 
     33     if (ch === '#') {
     34       stream.skipToEnd();
     35       return "comment";
     36     }
     37 
     38     if (ch == "\"") {
     39       state.tokenize = tokenString(ch);
     40       return state.tokenize(stream, state);
     41     }
     42 
     43     if (ch == "(") {
     44       state._indent.push("(");
     45       // add virtual angel wings so that editor behaves...
     46       // ...more sane incase of broken brackets
     47       state._indent.push("{");
     48       return null;
     49     }
     50 
     51     if (ch === "{") {
     52       state._indent.push("{");
     53       return null;
     54     }
     55 
     56     if (ch == ")")  {
     57       state._indent.pop();
     58       state._indent.pop();
     59     }
     60 
     61     if (ch === "}") {
     62       state._indent.pop();
     63       return null;
     64     }
     65 
     66     if (ch == ",")
     67       return null;
     68 
     69     if (ch == ";")
     70       return null;
     71 
     72 
     73     if (/[{}\(\),;]/.test(ch))
     74       return null;
     75 
     76     // 1*DIGIT "K" / "M" / "G"
     77     if (/\d/.test(ch)) {
     78       stream.eatWhile(/[\d]/);
     79       stream.eat(/[KkMmGg]/);
     80       return "number";
     81     }
     82 
     83     // ":" (ALPHA / "_") *(ALPHA / DIGIT / "_")
     84     if (ch == ":") {
     85       stream.eatWhile(/[a-zA-Z_]/);
     86       stream.eatWhile(/[a-zA-Z0-9_]/);
     87 
     88       return "operator";
     89     }
     90 
     91     stream.eatWhile(/\w/);
     92     var cur = stream.current();
     93 
     94     // "text:" *(SP / HTAB) (hash-comment / CRLF)
     95     // *(multiline-literal / multiline-dotstart)
     96     // "." CRLF
     97     if ((cur == "text") && stream.eat(":"))
     98     {
     99       state.tokenize = tokenMultiLineString;
    100       return "string";
    101     }
    102 
    103     if (keywords.propertyIsEnumerable(cur))
    104       return "keyword";
    105 
    106     if (atoms.propertyIsEnumerable(cur))
    107       return "atom";
    108 
    109     return null;
    110   }
    111 
    112   function tokenMultiLineString(stream, state)
    113   {
    114     state._multiLineString = true;
    115     // the first line is special it may contain a comment
    116     if (!stream.sol()) {
    117       stream.eatSpace();
    118 
    119       if (stream.peek() == "#") {
    120         stream.skipToEnd();
    121         return "comment";
    122       }
    123 
    124       stream.skipToEnd();
    125       return "string";
    126     }
    127 
    128     if ((stream.next() == ".")  && (stream.eol()))
    129     {
    130       state._multiLineString = false;
    131       state.tokenize = tokenBase;
    132     }
    133 
    134     return "string";
    135   }
    136 
    137   function tokenCComment(stream, state) {
    138     var maybeEnd = false, ch;
    139     while ((ch = stream.next()) != null) {
    140       if (maybeEnd && ch == "/") {
    141         state.tokenize = tokenBase;
    142         break;
    143       }
    144       maybeEnd = (ch == "*");
    145     }
    146     return "comment";
    147   }
    148 
    149   function tokenString(quote) {
    150     return function(stream, state) {
    151       var escaped = false, ch;
    152       while ((ch = stream.next()) != null) {
    153         if (ch == quote && !escaped)
    154           break;
    155         escaped = !escaped && ch == "\\";
    156       }
    157       if (!escaped) state.tokenize = tokenBase;
    158       return "string";
    159     };
    160   }
    161 
    162   return {
    163     startState: function(base) {
    164       return {tokenize: tokenBase,
    165               baseIndent: base || 0,
    166               _indent: []};
    167     },
    168 
    169     token: function(stream, state) {
    170       if (stream.eatSpace())
    171         return null;
    172 
    173       return (state.tokenize || tokenBase)(stream, state);
    174     },
    175 
    176     indent: function(state, _textAfter) {
    177       var length = state._indent.length;
    178       if (_textAfter && (_textAfter[0] == "}"))
    179         length--;
    180 
    181       if (length <0)
    182         length = 0;
    183 
    184       return length * indentUnit;
    185     },
    186 
    187     electricChars: "}"
    188   };
    189 });
    190 
    191 CodeMirror.defineMIME("application/sieve", "sieve");
    192 
    193 });