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 *
 * Copyright (c) 2010, Ajax.org B.V.
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 * 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.
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 *       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 XmlHighlightRules = function (normalize) {
        // http://www.w3.org/TR/REC-xml/#NT-NameChar
        // NameStartChar	   ::=   	":" | [A-Z] | "_" | [a-z] | [#xC0-#xD6] | [#xD8-#xF6] | [#xF8-#x2FF] | [#x370-#x37D] | [#x37F-#x1FFF] | [#x200C-#x200D] | [#x2070-#x218F] | [#x2C00-#x2FEF] | [#x3001-#xD7FF] | [#xF900-#xFDCF] | [#xFDF0-#xFFFD] | [#x10000-#xEFFFF]
        // NameChar	   ::=   	NameStartChar | "-" | "." | [0-9] | #xB7 | [#x0300-#x036F] | [#x203F-#x2040]
        var tagRegex = "[_:a-zA-Z\xc0-\uffff][-_:.a-zA-Z0-9\xc0-\uffff]*";

        this.$rules = {
            start: [
                {token: "string.cdata.xml", regex: "<\\!\\[CDATA\\[", next: "cdata"},
                {
                    token: ["punctuation.xml-decl.xml", "keyword.xml-decl.xml"],
                    regex: "(<\\?)(xml)(?=[\\s])", next: "xml_decl", caseInsensitive: true
                },
                {
                    token: ["punctuation.instruction.xml", "keyword.instruction.xml"],
                    regex: "(<\\?)(" + tagRegex + ")", next: "processing_instruction"
                },
                {token: "comment.xml", regex: "<\\!--", next: "comment"},
                {
                    token: ["xml-pe.doctype.xml", "xml-pe.doctype.xml"],
                    regex: "(<\\!)(DOCTYPE)(?=[\\s])", next: "doctype", caseInsensitive: true
                },
                {include: "tag"},
                {token: "text.end-tag-open.xml", regex: "</"},
                {token: "text.tag-open.xml", regex: "<"},
                {include: "reference"},
                {defaultToken: "text.xml"}
            ],

            xml_decl: [{
                token: "entity.other.attribute-name.decl-attribute-name.xml",
                regex: "(?:" + tagRegex + ":)?" + tagRegex + ""
            }, {
                token: "keyword.operator.decl-attribute-equals.xml",
                regex: "="
            }, {
                include: "whitespace"
            }, {
                include: "string"
            }, {
                token: "punctuation.xml-decl.xml",
                regex: "\\?>",
                next: "start"
            }],

            processing_instruction: [
                {token: "punctuation.instruction.xml", regex: "\\?>", next: "start"},
                {defaultToken: "instruction.xml"}
            ],

            doctype: [
                {include: "whitespace"},
                {include: "string"},
                {token: "xml-pe.doctype.xml", regex: ">", next: "start"},
                {token: "xml-pe.xml", regex: "[-_a-zA-Z0-9:]+"},
                {token: "punctuation.int-subset", regex: "\\[", push: "int_subset"}
            ],

            int_subset: [{
                token: "text.xml",
                regex: "\\s+"
            }, {
                token: "punctuation.int-subset.xml",
                regex: "]",
                next: "pop"
            }, {
                token: ["punctuation.markup-decl.xml", "keyword.markup-decl.xml"],
                regex: "(<\\!)(" + tagRegex + ")",
                push: [{
                    token: "text",
                    regex: "\\s+"
                },
                    {
                        token: "punctuation.markup-decl.xml",
                        regex: ">",
                        next: "pop"
                    },
                    {include: "string"}]
            }],

            cdata: [
                {token: "string.cdata.xml", regex: "\\]\\]>", next: "start"},
                {token: "text.xml", regex: "\\s+"},
                {token: "text.xml", regex: "(?:[^\\]]|\\](?!\\]>))+"}
            ],

            comment: [
                {token: "comment.xml", regex: "-->", next: "start"},
                {defaultToken: "comment.xml"}
            ],

            reference: [{
                token: "constant.language.escape.reference.xml",
                regex: "(?:&#[0-9]+;)|(?:&#x[0-9a-fA-F]+;)|(?:&[a-zA-Z0-9_:\\.-]+;)"
            }],

            attr_reference: [{
                token: "constant.language.escape.reference.attribute-value.xml",
                regex: "(?:&#[0-9]+;)|(?:&#x[0-9a-fA-F]+;)|(?:&[a-zA-Z0-9_:\\.-]+;)"
            }],

            tag: [{
                token: ["meta.tag.punctuation.tag-open.xml", "meta.tag.punctuation.end-tag-open.xml", "meta.tag.tag-name.xml"],
                regex: "(?:(<)|(</))((?:" + tagRegex + ":)?" + tagRegex + ")",
                next: [
                    {include: "attributes"},
                    {token: "meta.tag.punctuation.tag-close.xml", regex: "/?>", next: "start"}
                ]
            }],

            tag_whitespace: [
                {token: "text.tag-whitespace.xml", regex: "\\s+"}
            ],
            // for doctype and processing instructions
            whitespace: [
                {token: "text.whitespace.xml", regex: "\\s+"}
            ],

            // for doctype and processing instructions
            string: [{
                token: "string.xml",
                regex: "'",
                push: [
                    {token: "string.xml", regex: "'", next: "pop"},
                    {defaultToken: "string.xml"}
                ]
            }, {
                token: "string.xml",
                regex: '"',
                push: [
                    {token: "string.xml", regex: '"', next: "pop"},
                    {defaultToken: "string.xml"}
                ]
            }],

            attributes: [{
                token: "entity.other.attribute-name.xml",
                regex: "(?:" + tagRegex + ":)?" + tagRegex + ""
            }, {
                token: "keyword.operator.attribute-equals.xml",
                regex: "="
            }, {
                include: "tag_whitespace"
            }, {
                include: "attribute_value"
            }],

            attribute_value: [{
                token: "string.attribute-value.xml",
                regex: "'",
                push: [
                    {token: "string.attribute-value.xml", regex: "'", next: "pop"},
                    {include: "attr_reference"},
                    {defaultToken: "string.attribute-value.xml"}
                ]
            }, {
                token: "string.attribute-value.xml",
                regex: '"',
                push: [
                    {token: "string.attribute-value.xml", regex: '"', next: "pop"},
                    {include: "attr_reference"},
                    {defaultToken: "string.attribute-value.xml"}
                ]
            }]
        };

        if (this.constructor === XmlHighlightRules)
            this.normalizeRules();
    };


    (function () {

        this.embedTagRules = function (HighlightRules, prefix, tag) {
            this.$rules.tag.unshift({
                token: ["meta.tag.punctuation.tag-open.xml", "meta.tag." + tag + ".tag-name.xml"],
                regex: "(<)(" + tag + "(?=\\s|>|$))",
                next: [
                    {include: "attributes"},
                    {token: "meta.tag.punctuation.tag-close.xml", regex: "/?>", next: prefix + "start"}
                ]
            });

            this.$rules[tag + "-end"] = [
                {include: "attributes"},
                {
                    token: "meta.tag.punctuation.tag-close.xml", regex: "/?>", next: "start",
                    onMatch: function (value, currentState, stack) {
                        stack.splice(0);
                        return this.token;
                    }
                }
            ]

            this.embedRules(HighlightRules, prefix, [{
                token: ["meta.tag.punctuation.end-tag-open.xml", "meta.tag." + tag + ".tag-name.xml"],
                regex: "(</)(" + tag + "(?=\\s|>|$))",
                next: tag + "-end"
            }, {
                token: "string.cdata.xml",
                regex: "<\\!\\[CDATA\\["
            }, {
                token: "string.cdata.xml",
                regex: "\\]\\]>"
            }]);
        };

    }).call(TextHighlightRules.prototype);

    oop.inherits(XmlHighlightRules, TextHighlightRules);

    exports.XmlHighlightRules = XmlHighlightRules;
});
