/*
 * tex_highlight_rules.js
 *
 * Copyright (C) 2009-11 by RStudio, Inc.
 *
 * 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.
 *
 * 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
 *
 */
define(function (require, exports, module) {
    "use strict";

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

    var TexHighlightRules = function (textClass) {

        if (!textClass)
            textClass = "text";

        // regexp must not have capturing parentheses. Use (?:) instead.
        // regexps are ordered -> the first match is used

        this.$rules = {
            "start": [
                {
                    token: "comment",
                    regex: "%.*$"
                }, {
                    token: textClass, // non-command
                    regex: "\\\\[$&%#\\{\\}]"
                }, {
                    token: "keyword", // command
                    regex: "\\\\(?:documentclass|usepackage|newcounter|setcounter|addtocounter|value|arabic|stepcounter|newenvironment|renewenvironment|ref|vref|eqref|pageref|label|cite[a-zA-Z]*|tag|begin|end|bibitem)\\b",
                    next: "nospell"
                }, {
                    token: "keyword", // command
                    regex: "\\\\(?:[a-zA-Z0-9]+|[^a-zA-Z0-9])"
                }, {
                    // Obviously these are neither keywords nor operators, but
                    // labelling them as such was the easiest way to get them
                    // to be colored distinctly from regular text
                    token: "paren.keyword.operator",
                    regex: "[[({]"
                }, {
                    // Obviously these are neither keywords nor operators, but
                    // labelling them as such was the easiest way to get them
                    // to be colored distinctly from regular text
                    token: "paren.keyword.operator",
                    regex: "[\\])}]"
                }, {
                    token: textClass,
                    regex: "\\s+"
                }
            ],
            // This mode is necessary to prevent spell checking, but to keep the
            // same syntax highlighting behavior. The list of commands comes from
            // Texlipse.
            "nospell": [
                {
                    token: "comment",
                    regex: "%.*$",
                    next: "start"
                }, {
                    token: "nospell." + textClass, // non-command
                    regex: "\\\\[$&%#\\{\\}]"
                }, {
                    token: "keyword", // command
                    regex: "\\\\(?:documentclass|usepackage|newcounter|setcounter|addtocounter|value|arabic|stepcounter|newenvironment|renewenvironment|ref|vref|eqref|pageref|label|cite[a-zA-Z]*|tag|begin|end|bibitem)\\b"
                }, {
                    token: "keyword", // command
                    regex: "\\\\(?:[a-zA-Z0-9]+|[^a-zA-Z0-9])",
                    next: "start"
                }, {
                    token: "paren.keyword.operator",
                    regex: "[[({]"
                }, {
                    token: "paren.keyword.operator",
                    regex: "[\\])]"
                }, {
                    token: "paren.keyword.operator",
                    regex: "}",
                    next: "start"
                }, {
                    token: "nospell." + textClass,
                    regex: "\\s+"
                }, {
                    token: "nospell." + textClass,
                    regex: "\\w+"
                }
            ]
        };
    };

    oop.inherits(TexHighlightRules, TextHighlightRules);

    exports.TexHighlightRules = TexHighlightRules;
});
