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Edit File: coffeescript.js

// CodeMirror, copyright (c) by Marijn Haverbeke and others
// Distributed under an MIT license: http://codemirror.net/LICENSE

/**
 * Link to the project's GitHub page:
 * https://github.com/pickhardt/coffeescript-codemirror-mode
 */
(function(mod) {
  if (typeof exports == "object" && typeof module == "object") // CommonJS
    mod(require("../../lib/codemirror"));
  else if (typeof define == "function" && define.amd) // AMD
    define(["../../lib/codemirror"], mod);
  else // Plain browser env
    mod(CodeMirror);
})(function(CodeMirror) {
"use strict";

CodeMirror.defineMode("coffeescript", function(conf, parserConf) {
  var ERRORCLASS = "error";

function wordRegexp(words) {
    return new RegExp("^((" + words.join(")|(") + "))\\b");
  }

var operators = /^(?:->|=>|\+[+=]?|-[\-=]?|\*[\*=]?|\/[\/=]?|[=!]=|<[><]?=?|>>?=?|%=?|&=?|\|=?|\^=?|\~|!|\?|(or|and|\|\||&&|\?)=)/;
  var delimiters = /^(?:[()\[\]{},:`=;]|\.\.?\.?)/;
  var identifiers = /^[_A-Za-z$][_A-Za-z$0-9]*/;
  var atProp = /^@[_A-Za-z$][_A-Za-z$0-9]*/;

var wordOperators = wordRegexp(["and", "or", "not",
                                  "is", "isnt", "in",
                                  "instanceof", "typeof"]);
  var indentKeywords = ["for", "while", "loop", "if", "unless", "else",
                        "switch", "try", "catch", "finally", "class"];
  var commonKeywords = ["break", "by", "continue", "debugger", "delete",
                        "do", "in", "of", "new", "return", "then",
                        "this", "@", "throw", "when", "until", "extends"];

var keywords = wordRegexp(indentKeywords.concat(commonKeywords));

indentKeywords = wordRegexp(indentKeywords);

// Tokenizers
  function tokenBase(stream, state) {
    // Handle scope changes
    if (stream.sol()) {
      if (state.scope.align === null) state.scope.align = false;
      var scopeOffset = state.scope.offset;
      if (stream.eatSpace()) {
        var lineOffset = stream.indentation();
        if (lineOffset > scopeOffset && state.scope.type == "coffee") {
          return "indent";
        } else if (lineOffset < scopeOffset) {
          return "dedent";
        }
        return null;
      } else {
        if (scopeOffset > 0) {
          dedent(stream, state);
        }
      }
    }
    if (stream.eatSpace()) {
      return null;
    }

var ch = stream.peek();

// Handle docco title comment (single line)
    if (stream.match("####")) {
      stream.skipToEnd();
      return "comment";
    }

// Handle multi line comments
    if (stream.match("###")) {
      state.tokenize = longComment;
      return state.tokenize(stream, state);
    }

// Single line comment
    if (ch === "#") {
      stream.skipToEnd();
      return "comment";
    }

// Handle number literals
    if (stream.match(/^-?[0-9\.]/, false)) {
      var floatLiteral = false;
      // Floats
      if (stream.match(/^-?\d*\.\d+(e[\+\-]?\d+)?/i)) {
        floatLiteral = true;
      }
      if (stream.match(/^-?\d+\.\d*/)) {
        floatLiteral = true;
      }
      if (stream.match(/^-?\.\d+/)) {
        floatLiteral = true;
      }

if (floatLiteral) {
        // prevent from getting extra . on 1..
        if (stream.peek() == "."){
          stream.backUp(1);
        }
        return "number";
      }
      // Integers
      var intLiteral = false;
      // Hex
      if (stream.match(/^-?0x[0-9a-f]+/i)) {
        intLiteral = true;
      }
      // Decimal
      if (stream.match(/^-?[1-9]\d*(e[\+\-]?\d+)?/)) {
        intLiteral = true;
      }
      // Zero by itself with no other piece of number.
      if (stream.match(/^-?0(?![\dx])/i)) {
        intLiteral = true;
      }
      if (intLiteral) {
        return "number";
      }
    }

// Handle strings
    if (stream.match(stringPrefixes)) {
      state.tokenize = tokenFactory(stream.current(), false, "string");
      return state.tokenize(stream, state);
    }
    // Handle regex literals
    if (stream.match(regexPrefixes)) {
      if (stream.current() != "/" || stream.match(/^.*\//, false)) { // prevent highlight of division
        state.tokenize = tokenFactory(stream.current(), true, "string-2");
        return state.tokenize(stream, state);
      } else {
        stream.backUp(1);
      }
    }

// Handle operators and delimiters
    if (stream.match(operators) || stream.match(wordOperators)) {
      return "operator";
    }
    if (stream.match(delimiters)) {
      return "punctuation";
    }

if (stream.match(constants)) {
      return "atom";
    }

if (stream.match(atProp) || state.prop && stream.match(identifiers)) {
      return "property";
    }

if (stream.match(keywords)) {
      return "keyword";
    }

if (stream.match(identifiers)) {
      return "variable";
    }

// Handle non-detected items
    stream.next();
    return ERRORCLASS;
  }

function tokenLexer(stream, state) {
    var style = state.tokenize(stream, state);
    var current = stream.current();

// Handle scope changes.
    if (current === "return") {
      state.dedent = true;
    }
    if (((current === "->" || current === "=>") && stream.eol())
        || style === "indent") {
      indent(stream, state);
    }
    var delimiter_index = "[({".indexOf(current);
    if (delimiter_index !== -1) {
      indent(stream, state, "])}".slice(delimiter_index, delimiter_index+1));
    }
    if (indentKeywords.exec(current)){
      indent(stream, state);
    }
    if (current == "then"){
      dedent(stream, state);
    }

if (style === "dedent") {
      if (dedent(stream, state)) {
        return ERRORCLASS;
      }
    }
    delimiter_index = "])}".indexOf(current);
    if (delimiter_index !== -1) {
      while (state.scope.type == "coffee" && state.scope.prev)
        state.scope = state.scope.prev;
      if (state.scope.type == current)
        state.scope = state.scope.prev;
    }
    if (state.dedent && stream.eol()) {
      if (state.scope.type == "coffee" && state.scope.prev)
        state.scope = state.scope.prev;
      state.dedent = false;
    }

return style;
  }

var external = {
    startState: function(basecolumn) {
      return {
        tokenize: tokenBase,
        scope: {offset:basecolumn || 0, type:"coffee", prev: null, align: false},
        prop: false,
        dedent: 0
      };
    },

token: function(stream, state) {
      var fillAlign = state.scope.align === null && state.scope;
      if (fillAlign && stream.sol()) fillAlign.align = false;

var style = tokenLexer(stream, state);
      if (style && style != "comment") {
        if (fillAlign) fillAlign.align = true;
        state.prop = style == "punctuation" && stream.current() == "."
      }

return style;
    },

indent: function(state, text) {
      if (state.tokenize != tokenBase) return 0;
      var scope = state.scope;
      var closer = text && "])}".indexOf(text.charAt(0)) > -1;
      if (closer) while (scope.type == "coffee" && scope.prev) scope = scope.prev;
      var closes = closer && scope.type === text.charAt(0);
      if (scope.align)
        return scope.alignOffset - (closes ? 1 : 0);
      else
        return (closes ? scope.prev : scope).offset;
    },

lineComment: "#",
    fold: "indent"
  };
  return external;
});

CodeMirror.defineMIME("text/x-coffeescript", "coffeescript");
CodeMirror.defineMIME("text/coffeescript", "coffeescript");

});

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