/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Ajax.org Code Editor (ACE).
 *
 * The Initial Developer of the Original Code is
 * Ajax.org B.V.
 * Portions created by the Initial Developer are Copyright (C) 2010
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *      Meg Sharkey <megshark AT gmail DOT com>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either the GNU General Public License Version 2 or later (the "GPL"), or
 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

define(function(require, exports, module) {
"use strict";

var oop = require("../lib/oop");
var TextHighlightRules = require("./text_highlight_rules").TextHighlightRules;

var YamlHighlightRules = function() {

    // regexp must not have capturing parentheses. Use (?:) instead.
    // regexps are ordered -> the first match is used
    this.$rules = {
        "start" : [
            {
                token : "comment",
                regex : "#.*$"
            }, {
                token : "comment",
                regex : "^---"
            }, {
                token: "variable",
                regex: "[&\\*][a-zA-Z0-9-_]+"
            }, {
                token: ["identifier", "text"],
                regex: "(\\w+\\s*:)(\\w*)"
            }, {
                token : "keyword.operator",
                regex : "<<\\w*:\\w*"
            }, {
                token : "keyword.operator",
                regex : "-\\s*(?=[{])"
            }, {
                token : "string", // single line
                regex : '["](?:(?:\\\\.)|(?:[^"\\\\]))*?["]'
            }, {
                token : "string", // multi line string start
                merge : true,
                regex : '[\\|>]\\w*',
                next : "qqstring"
            }, {
                token : "string", // single quoted string
                regex : "['](?:(?:\\\\.)|(?:[^'\\\\]))*?[']"
            }, {
                token : "constant.numeric", // float
                regex : "[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"
            }, {
                token : "constant.language.boolean",
                regex : "(?:true|false|yes|no)\\b"
            }, {
                token : "invalid.illegal", // comments are not allowed
                regex : "\\/\\/.*$"
            }, {
                token : "paren.lparen",
                regex : "[[({]"
            }, {
                token : "paren.rparen",
                regex : "[\\])}]"
            }, {
                token : "text",
                regex : "\\s+"
            }
        ],
        "qqstring" : [
            {
                token : "string",
                regex : '(?=(?:(?:\\\\.)|(?:[^:]))*?:)',
                next : "start"
            }, {
                token : "string",
                merge : true,
                regex : '.+'
            }
        ]}

};

oop.inherits(YamlHighlightRules, TextHighlightRules);

exports.YamlHighlightRules = YamlHighlightRules;
});