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 *
 * Copyright (c) 2010, Ajax.org B.V.
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 *     * 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
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define(function (require, exports, module) {
    "use strict";

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

    var AsciidocHighlightRules = function () {
        var identifierRe = "[a-zA-Z\u00a1-\uffff]+\\b";

        this.$rules = {
            "start": [
                {token: "empty", regex: /$/},
                {token: "literal", regex: /^\.{4,}\s*$/, next: "listingBlock"},
                {token: "literal", regex: /^-{4,}\s*$/, next: "literalBlock"},
                {token: "string", regex: /^\+{4,}\s*$/, next: "passthroughBlock"},
                {token: "keyword", regex: /^={4,}\s*$/},
                {token: "text", regex: /^\s*$/},
                // immediately return to the start mode without matching anything
                {token: "empty", regex: "", next: "dissallowDelimitedBlock"}
            ],

            "dissallowDelimitedBlock": [
                {include: "paragraphEnd"},
                {token: "comment", regex: '^//.+$'},
                {token: "keyword", regex: "^(?:NOTE|TIP|IMPORTANT|WARNING|CAUTION):"},

                {include: "listStart"},
                {token: "literal", regex: /^\s+.+$/, next: "indentedBlock"},
                {token: "empty", regex: "", next: "text"}
            ],

            "paragraphEnd": [
                {token: "doc.comment", regex: /^\/{4,}\s*$/, next: "commentBlock"},
                {token: "tableBlock", regex: /^\s*[|!]=+\s*$/, next: "tableBlock"},
                // open block, ruller
                {token: "keyword", regex: /^(?:--|''')\s*$/, next: "start"},
                {token: "option", regex: /^\[.*\]\s*$/, next: "start"},
                {token: "pageBreak", regex: /^>{3,}$/, next: "start"},
                {token: "literal", regex: /^\.{4,}\s*$/, next: "listingBlock"},
                {token: "titleUnderline", regex: /^(?:={2,}|-{2,}|~{2,}|\^{2,}|\+{2,})\s*$/, next: "start"},
                {token: "singleLineTitle", regex: /^={1,5}\s+\S.*$/, next: "start"},

                {token: "otherBlock", regex: /^(?:\*{2,}|_{2,})\s*$/, next: "start"},
                // .optional title
                {token: "optionalTitle", regex: /^\.[^.\s].+$/, next: "start"}
            ],

            "listStart": [
                {
                    token: "keyword",
                    regex: /^\s*(?:\d+\.|[a-zA-Z]\.|[ixvmIXVM]+\)|\*{1,5}|-|\.{1,5})\s/,
                    next: "listText"
                },
                {token: "meta.tag", regex: /^.+(?::{2,4}|;;)(?: |$)/, next: "listText"},
                {token: "support.function.list.callout", regex: /^(?:<\d+>|\d+>|>) /, next: "text"},
                // continuation
                {token: "keyword", regex: /^\+\s*$/, next: "start"}
            ],

            "text": [
                {
                    token: ["link", "variable.language"],
                    regex: /((?:https?:\/\/|ftp:\/\/|file:\/\/|mailto:|callto:)[^\s\[]+)(\[.*?\])/
                },
                {token: "link", regex: /(?:https?:\/\/|ftp:\/\/|file:\/\/|mailto:|callto:)[^\s\[]+/},
                {token: "link", regex: /\b[\w\.\/\-]+@[\w\.\/\-]+\b/},
                {include: "macros"},
                {include: "paragraphEnd"},
                {token: "literal", regex: /\+{3,}/, next: "smallPassthrough"},
                {token: "escape", regex: /\((?:C|TM|R)\)|\.{3}|->|<-|=>|<=|&#(?:\d+|x[a-fA-F\d]+);|(?: |^)--(?=\s+\S)/},
                {token: "escape", regex: /\\[_*'`+#]|\\{2}[_*'`+#]{2}/},
                {token: "keyword", regex: /\s\+$/},
                // any word
                {token: "text", regex: identifierRe},
                {
                    token: ["keyword", "string", "keyword"],
                    regex: /(<<[\w\d\-$]+,)(.*?)(>>|$)/
                },
                {token: "keyword", regex: /<<[\w\d\-$]+,?|>>/},
                {token: "constant.character", regex: /\({2,3}.*?\){2,3}/},
                // Anchor
                {token: "keyword", regex: /\[\[.+?\]\]/},
                // bibliography
                {token: "support", regex: /^\[{3}[\w\d =\-]+\]{3}/},

                {include: "quotes"},
                // text block end
                {token: "empty", regex: /^\s*$/, next: "start"}
            ],

            "listText": [
                {include: "listStart"},
                {include: "text"}
            ],

            "indentedBlock": [
                {token: "literal", regex: /^[\s\w].+$/, next: "indentedBlock"},
                {token: "literal", regex: "", next: "start"}
            ],

            "listingBlock": [
                {token: "literal", regex: /^\.{4,}\s*$/, next: "dissallowDelimitedBlock"},
                {token: "constant.numeric", regex: '<\\d+>'},
                {token: "literal", regex: '[^<]+'},
                {token: "literal", regex: '<'}
            ],
            "literalBlock": [
                {token: "literal", regex: /^-{4,}\s*$/, next: "dissallowDelimitedBlock"},
                {token: "constant.numeric", regex: '<\\d+>'},
                {token: "literal", regex: '[^<]+'},
                {token: "literal", regex: '<'}
            ],
            "passthroughBlock": [
                {token: "literal", regex: /^\+{4,}\s*$/, next: "dissallowDelimitedBlock"},
                {token: "literal", regex: identifierRe + "|\\d+"},
                {include: "macros"},
                {token: "literal", regex: "."}
            ],

            "smallPassthrough": [
                {token: "literal", regex: /[+]{3,}/, next: "dissallowDelimitedBlock"},
                {token: "literal", regex: /^\s*$/, next: "dissallowDelimitedBlock"},
                {token: "literal", regex: identifierRe + "|\\d+"},
                {include: "macros"}
            ],

            "commentBlock": [
                {token: "doc.comment", regex: /^\/{4,}\s*$/, next: "dissallowDelimitedBlock"},
                {token: "doc.comment", regex: '^.*$'}
            ],
            "tableBlock": [
                {token: "tableBlock", regex: /^\s*\|={3,}\s*$/, next: "dissallowDelimitedBlock"},
                {token: "tableBlock", regex: /^\s*!={3,}\s*$/, next: "innerTableBlock"},
                {token: "tableBlock", regex: /\|/},
                {include: "text", noEscape: true}
            ],
            "innerTableBlock": [
                {token: "tableBlock", regex: /^\s*!={3,}\s*$/, next: "tableBlock"},
                {token: "tableBlock", regex: /^\s*|={3,}\s*$/, next: "dissallowDelimitedBlock"},
                {token: "tableBlock", regex: /!/}
            ],
            "macros": [
                {token: "macro", regex: /{[\w\-$]+}/},
                {token: ["text", "string", "text", "constant.character", "text"], regex: /({)([\w\-$]+)(:)?(.+)?(})/},
                {
                    token: ["text", "markup.list.macro", "keyword", "string"],
                    regex: /(\w+)(footnote(?:ref)?::?)([^\s\[]+)?(\[.*?\])?/
                },
                {
                    token: ["markup.list.macro", "keyword", "string"],
                    regex: /([a-zA-Z\-][\w\.\/\-]*::?)([^\s\[]+)(\[.*?\])?/
                },
                {token: ["markup.list.macro", "keyword"], regex: /([a-zA-Z\-][\w\.\/\-]+::?)(\[.*?\])/},
                {token: "keyword", regex: /^:.+?:(?= |$)/}
            ],

            "quotes": [
                {token: "string.italic", regex: /__[^_\s].*?__/},
                {token: "string.italic", regex: quoteRule("_")},

                {token: "keyword.bold", regex: /\*\*[^*\s].*?\*\*/},
                {token: "keyword.bold", regex: quoteRule("\\*")},

                {token: "literal", regex: quoteRule("\\+")},
                {token: "literal", regex: /\+\+[^+\s].*?\+\+/},
                {token: "literal", regex: /\$\$.+?\$\$/},
                {token: "literal", regex: quoteRule("`")},

                {token: "keyword", regex: quoteRule("^")},
                {token: "keyword", regex: quoteRule("~")},
                {token: "keyword", regex: /##?/},
                {token: "keyword", regex: /(?:\B|^)``|\b''/}
            ]

        };

        function quoteRule(ch) {
            var prefix = /\w/.test(ch) ? "\\b" : "(?:\\B|^)";
            return prefix + ch + "[^" + ch + "].*?" + ch + "(?![\\w*])";
        }

        //addQuoteBlock("text")

        var tokenMap = {
            macro: "constant.character",
            tableBlock: "doc.comment",
            titleUnderline: "markup.heading",
            singleLineTitle: "markup.heading",
            pageBreak: "string",
            option: "string.regexp",
            otherBlock: "markup.list",
            literal: "support.function",
            optionalTitle: "constant.numeric",
            escape: "constant.language.escape",
            link: "markup.underline.list"
        };

        for (var state in this.$rules) {
            var stateRules = this.$rules[state];
            for (var i = stateRules.length; i--;) {
                var rule = stateRules[i];
                if (rule.include || typeof rule == "string") {
                    var args = [i, 1].concat(this.$rules[rule.include || rule]);
                    if (rule.noEscape) {
                        args = args.filter(function (x) {
                            return !x.next;
                        });
                    }
                    stateRules.splice.apply(stateRules, args);
                } else if (rule.token in tokenMap) {
                    rule.token = tokenMap[rule.token];
                }
            }
        }
    };
    oop.inherits(AsciidocHighlightRules, TextHighlightRules);

    exports.AsciidocHighlightRules = AsciidocHighlightRules;
});
