/* ***** BEGIN LICENSE BLOCK *****
 * Distributed under the BSD license:
 *
 * Copyright (c) 2010, Ajax.org B.V.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Ajax.org B.V. nor the
 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL AJAX.ORG B.V. BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ***** 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: "list.markup",
                    regex: /^(?:-{3}|\.{3})\s*(?=#|$)/
                }, {
                    token: "list.markup",
                    regex: /^\s*[\-?](?:$|\s)/
                }, {
                    token: "constant",
                    regex: "!![\\w//]+"
                }, {
                    token: "constant.language",
                    regex: "[&\\*][a-zA-Z0-9-_]+"
                }, {
                    token: ["meta.tag", "keyword"],
                    regex: /^(\s*\w.*?)(:(?:\s+|$))/
                }, {
                    token: ["meta.tag", "keyword"],
                    regex: /(\w+?)(\s*:(?:\s+|$))/
                }, {
                    token: "keyword.operator",
                    regex: "<<\\w*:\\w*"
                }, {
                    token: "keyword.operator",
                    regex: "-\\s*(?=[{])"
                }, {
                    token: "string", // single line
                    regex: '["](?:(?:\\\\.)|(?:[^"\\\\]))*?["]'
                }, {
                    token: "string", // multi line string start
                    regex: '[|>][-+\\d\\s]*$',
                    next: "qqstring"
                }, {
                    token: "string", // single quoted string
                    regex: "['](?:(?:\\\\.)|(?:[^'\\\\]))*?[']"
                }, {
                    token: "constant.numeric", // float
                    regex: /(\b|[+\-\.])[\d_]+(?:(?:\.[\d_]*)?(?:[eE][+\-]?[\d_]+)?)/
                }, {
                    token: "constant.numeric", // other number
                    regex: /[+\-]?\.inf\b|NaN\b|0x[\dA-Fa-f_]+|0b[10_]+/
                }, {
                    token: "constant.language.boolean",
                    regex: "\\b(?:true|false|TRUE|FALSE|True|False|yes|no)\\b"
                }, {
                    token: "paren.lparen",
                    regex: "[[({]"
                }, {
                    token: "paren.rparen",
                    regex: "[\\])}]"
                }
            ],
            "qqstring": [
                {
                    token: "string",
                    regex: '(?=(?:(?:\\\\.)|(?:[^:]))*?:)',
                    next: "start"
                }, {
                    token: "string",
                    regex: '.+'
                }
            ]
        };

    };

    oop.inherits(YamlHighlightRules, TextHighlightRules);

    exports.YamlHighlightRules = YamlHighlightRules;
});
