/* ***** 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):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *
 * 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 ***** */

ace.define('ace/mode/xml', ['require', 'exports', 'module' , 'ace/lib/oop', 'ace/mode/text', 'ace/tokenizer', 'ace/mode/xml_highlight_rules', 'ace/mode/behaviour/xml', 'ace/mode/folding/xml'], function(require, exports, module) {
"use strict";

var oop = require("../lib/oop");
var TextMode = require("./text").Mode;
var Tokenizer = require("../tokenizer").Tokenizer;
var XmlHighlightRules = require("./xml_highlight_rules").XmlHighlightRules;
var XmlBehaviour = require("./behaviour/xml").XmlBehaviour;
var XmlFoldMode = require("./folding/xml").FoldMode;

var Mode = function() {
    this.$tokenizer = new Tokenizer(new XmlHighlightRules().getRules());
    this.$behaviour = new XmlBehaviour();
    this.foldingRules = new XmlFoldMode();
};

oop.inherits(Mode, TextMode);

(function() {
    
    this.getNextLineIndent = function(state, line, tab) {
        return this.$getIndent(line);
    };

}).call(Mode.prototype);

exports.Mode = Mode;
});
/* ***** 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):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *
 * 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 ***** */

ace.define('ace/mode/xml_highlight_rules', ['require', 'exports', 'module' , 'ace/lib/oop', 'ace/mode/xml_util', 'ace/mode/text_highlight_rules'], function(require, exports, module) {
"use strict";

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

var XmlHighlightRules = function() {

    // regexp must not have capturing parentheses
    // regexps are ordered -> the first match is used
    this.$rules = {
        start : [{
            token : "text",
            regex : "<\\!\\[CDATA\\[",
            next : "cdata"
        }, {
            token : "xml_pe",
            regex : "<\\?.*?\\?>"
        }, {
            token : "comment",
            merge : true,
            regex : "<\\!--",
            next : "comment"
        }, {
            token : "xml_pe",
            regex : "<\\!.*?>"
        }, {
            token : "meta.tag", // opening tag
            regex : "<\\/?",
            next : "tag"
        }, {
            token : "text",
            regex : "\\s+"
        }, {
            token : "constant.character.entity",
            regex : "(?:&#[0-9]+;)|(?:&#x[0-9a-fA-F]+;)|(?:&[a-zA-Z0-9_:\\.-]+;)"
        }, {
            token : "text",
            regex : "[^<]+"
        }],
        
        cdata : [{
            token : "text",
            regex : "\\]\\]>",
            next : "start"
        }, {
            token : "text",
            regex : "\\s+"
        }, {
            token : "text",
            regex : "(?:[^\\]]|\\](?!\\]>))+"
        }],

        comment : [{
            token : "comment",
            regex : ".*?-->",
            next : "start"
        }, {
            token : "comment",
            merge : true,
            regex : ".+"
        }]
    };
    
    xmlUtil.tag(this.$rules, "tag", "start");
};

oop.inherits(XmlHighlightRules, TextHighlightRules);

exports.XmlHighlightRules = XmlHighlightRules;
});
/* ***** 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):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *
 * 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 ***** */

ace.define('ace/mode/xml_util', ['require', 'exports', 'module' , 'ace/lib/lang'], function(require, exports, module) {
"use strict";

var lang = require("../lib/lang");

var formTags = lang.arrayToMap(
    ("button|form|input|label|select|textarea").split("|")
);

var tableTags = lang.arrayToMap(
    ("table|tbody|td|tfoot|th|tr").split("|")
);

function string(state) {
    return [{
        token : "string",
        regex : '".*?"'
    }, {
        token : "string", // multi line string start
        merge : true,
        regex : '["].*',
        next : state + "_qqstring"
    }, {
        token : "string",
        regex : "'.*?'"
    }, {
        token : "string", // multi line string start
        merge : true,
        regex : "['].*",
        next : state + "_qstring"
    }];
}

function multiLineString(quote, state) {
    return [{
        token : "string",
        merge : true,
        regex : ".*?" + quote,
        next : state
    }, {
        token : "string",
        merge : true,
        regex : '.+'
    }];
}

exports.tag = function(states, name, nextState) {
    states[name] = [{
        token : "text",
        regex : "\\s+"
    }, {
        //token : "meta.tag",
        
    token : function(value) {
            if ( value==='a' ) {
                return "meta.tag.anchor";
            }
            else if ( value==='img' ) {
                return "meta.tag.image";
            }
            else if ( value==='script' ) {
                return "meta.tag.script";
            }
            else if ( value==='style' ) {
                return "meta.tag.style";
            }
            else if (formTags.hasOwnProperty(value.toLowerCase())) {
                return "meta.tag.form";
            }
            else if (tableTags.hasOwnProperty(value.toLowerCase())) {
                return "meta.tag.table";
            }
            else {
                return "meta.tag";
            }
        },        
        merge : true,
        regex : "[-_a-zA-Z0-9:]+",
        next : name + "_embed_attribute_list" 
    }, {
        token: "empty",
        regex: "",
        next : name + "_embed_attribute_list"
    }];

    states[name + "_qstring"] = multiLineString("'", name + "_embed_attribute_list");
    states[name + "_qqstring"] = multiLineString("\"", name + "_embed_attribute_list");
    
    states[name + "_embed_attribute_list"] = [{
        token : "meta.tag",
        merge : true,
        regex : "\/?>",
        next : nextState
    }, {
        token : "keyword.operator",
        regex : "="
    }, {
        token : "entity.other.attribute-name",
        regex : "[-_a-zA-Z0-9:]+"
    }, {
        token : "constant.numeric", // float
        regex : "[+-]?\\d+(?:(?:\\.\\d*)?(?:[eE][+-]?\\d+)?)?\\b"
    }, {
        token : "text",
        regex : "\\s+"
    }].concat(string(name));
};

});
/* vim:ts=4:sts=4:sw=4:
 * ***** 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):
 *      Chris Spencer <chris.ag.spencer AT googlemail 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 ***** */

ace.define('ace/mode/behaviour/xml', ['require', 'exports', 'module' , 'ace/lib/oop', 'ace/mode/behaviour', 'ace/mode/behaviour/cstyle'], function(require, exports, module) {
"use strict";

var oop = require("../../lib/oop");
var Behaviour = require("../behaviour").Behaviour;
var CstyleBehaviour = require("./cstyle").CstyleBehaviour;

var XmlBehaviour = function () {
    
    this.inherit(CstyleBehaviour, ["string_dquotes"]); // Get string behaviour
    
    this.add("brackets", "insertion", function (state, action, editor, session, text) {
        if (text == '<') {
            var selection = editor.getSelectionRange();
            var selected = session.doc.getTextRange(selection);
            if (selected !== "") {
                return false;
            } else {
                return {
                    text: '<>',
                    selection: [1, 1]
                }
            }
        } else if (text == '>') {
            var cursor = editor.getCursorPosition();
            var line = session.doc.getLine(cursor.row);
            var rightChar = line.substring(cursor.column, cursor.column + 1);
            if (rightChar == '>') { // need some kind of matching check here
                return {
                    text: '',
                    selection: [1, 1]
                }
            }
        } else if (text == "\n") {
            var cursor = editor.getCursorPosition();
            var line = session.doc.getLine(cursor.row);
            var rightChars = line.substring(cursor.column, cursor.column + 2);
            if (rightChars == '</') {
                var indent = this.$getIndent(session.doc.getLine(cursor.row)) + session.getTabString();
                var next_indent = this.$getIndent(session.doc.getLine(cursor.row));

                return {
                    text: '\n' + indent + '\n' + next_indent,
                    selection: [1, indent.length, 1, indent.length]
                }
            }
        }
    });
    
}
oop.inherits(XmlBehaviour, Behaviour);

exports.XmlBehaviour = XmlBehaviour;
});/* vim:ts=4:sts=4:sw=4:
 * ***** 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):
 *      Chris Spencer <chris.ag.spencer AT googlemail 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 ***** */

ace.define('ace/mode/behaviour/cstyle', ['require', 'exports', 'module' , 'ace/lib/oop', 'ace/mode/behaviour'], function(require, exports, module) {
"use strict";

var oop = require("../../lib/oop");
var Behaviour = require('../behaviour').Behaviour;

var CstyleBehaviour = function () {

    this.add("braces", "insertion", function (state, action, editor, session, text) {
        if (text == '{') {
            var selection = editor.getSelectionRange();
            var selected = session.doc.getTextRange(selection);
            if (selected !== "") {
                return {
                    text: '{' + selected + '}',
                    selection: false
                };
            } else {
                return {
                    text: '{}',
                    selection: [1, 1]
                };
            }
        } else if (text == '}') {
            var cursor = editor.getCursorPosition();
            var line = session.doc.getLine(cursor.row);
            var rightChar = line.substring(cursor.column, cursor.column + 1);
            if (rightChar == '}') {
                var matching = session.$findOpeningBracket('}', {column: cursor.column + 1, row: cursor.row});
                if (matching !== null) {
                    return {
                        text: '',
                        selection: [1, 1]
                    };
                }
            }
        } else if (text == "\n") {
            var cursor = editor.getCursorPosition();
            var line = session.doc.getLine(cursor.row);
            var rightChar = line.substring(cursor.column, cursor.column + 1);
            if (rightChar == '}') {
                var openBracePos = session.findMatchingBracket({row: cursor.row, column: cursor.column + 1});
                if (!openBracePos)
                     return null;

                var indent = this.getNextLineIndent(state, line.substring(0, line.length - 1), session.getTabString());
                var next_indent = this.$getIndent(session.doc.getLine(openBracePos.row));

                return {
                    text: '\n' + indent + '\n' + next_indent,
                    selection: [1, indent.length, 1, indent.length]
                };
            }
        }
    });

    this.add("braces", "deletion", function (state, action, editor, session, range) {
        var selected = session.doc.getTextRange(range);
        if (!range.isMultiLine() && selected == '{') {
            var line = session.doc.getLine(range.start.row);
            var rightChar = line.substring(range.end.column, range.end.column + 1);
            if (rightChar == '}') {
                range.end.column++;
                return range;
            }
        }
    });

    this.add("parens", "insertion", function (state, action, editor, session, text) {
        if (text == '(') {
            var selection = editor.getSelectionRange();
            var selected = session.doc.getTextRange(selection);
            if (selected !== "") {
                return {
                    text: '(' + selected + ')',
                    selection: false
                };
            } else {
                return {
                    text: '()',
                    selection: [1, 1]
                };
            }
        } else if (text == ')') {
            var cursor = editor.getCursorPosition();
            var line = session.doc.getLine(cursor.row);
            var rightChar = line.substring(cursor.column, cursor.column + 1);
            if (rightChar == ')') {
                var matching = session.$findOpeningBracket(')', {column: cursor.column + 1, row: cursor.row});
                if (matching !== null) {
                    return {
                        text: '',
                        selection: [1, 1]
                    };
                }
            }
        }
    });

    this.add("parens", "deletion", function (state, action, editor, session, range) {
        var selected = session.doc.getTextRange(range);
        if (!range.isMultiLine() && selected == '(') {
            var line = session.doc.getLine(range.start.row);
            var rightChar = line.substring(range.start.column + 1, range.start.column + 2);
            if (rightChar == ')') {
                range.end.column++;
                return range;
            }
        }
    });

    this.add("string_dquotes", "insertion", function (state, action, editor, session, text) {
        if (text == '"' || text == "'") {
            var quote = text;
            var selection = editor.getSelectionRange();
            var selected = session.doc.getTextRange(selection);
            if (selected !== "") {
                return {
                    text: quote + selected + quote,
                    selection: false
                };
            } else {
                var cursor = editor.getCursorPosition();
                var line = session.doc.getLine(cursor.row);
                var leftChar = line.substring(cursor.column-1, cursor.column);

                // We're escaped.
                if (leftChar == '\\') {
                    return null;
                }

                // Find what token we're inside.
                var tokens = session.getTokens(selection.start.row, selection.start.row)[0].tokens;
                var col = 0, token;
                var quotepos = -1; // Track whether we're inside an open quote.

                for (var x = 0; x < tokens.length; x++) {
                    token = tokens[x];
                    if (token.type == "string") {
                      quotepos = -1;
                    } else if (quotepos < 0) {
                      quotepos = token.value.indexOf(quote);
                    }
                    if ((token.value.length + col) > selection.start.column) {
                        break;
                    }
                    col += tokens[x].value.length;
                }

                // Try and be smart about when we auto insert.
                if (!token || (quotepos < 0 && token.type !== "comment" && (token.type !== "string" || ((selection.start.column !== token.value.length+col-1) && token.value.lastIndexOf(quote) === token.value.length-1)))) {
                    return {
                        text: quote + quote,
                        selection: [1,1]
                    };
                } else if (token && token.type === "string") {
                    // Ignore input and move right one if we're typing over the closing quote.
                    var rightChar = line.substring(cursor.column, cursor.column + 1);
                    if (rightChar == quote) {
                        return {
                            text: '',
                            selection: [1, 1]
                        };
                    }
                }
            }
        }
    });

    this.add("string_dquotes", "deletion", function (state, action, editor, session, range) {
        var selected = session.doc.getTextRange(range);
        if (!range.isMultiLine() && (selected == '"' || selected == "'")) {
            var line = session.doc.getLine(range.start.row);
            var rightChar = line.substring(range.start.column + 1, range.start.column + 2);
            if (rightChar == '"') {
                range.end.column++;
                return range;
            }
        }
    });

};

oop.inherits(CstyleBehaviour, Behaviour);

exports.CstyleBehaviour = CstyleBehaviour;
});/* ***** 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):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *
 * 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 ***** */

ace.define('ace/mode/folding/xml', ['require', 'exports', 'module' , 'ace/lib/oop', 'ace/lib/lang', 'ace/range', 'ace/mode/folding/fold_mode', 'ace/token_iterator'], function(require, exports, module) {
"use strict";

var oop = require("../../lib/oop");
var lang = require("../../lib/lang");
var Range = require("../../range").Range;
var BaseFoldMode = require("./fold_mode").FoldMode;
var TokenIterator = require("../../token_iterator").TokenIterator;

var FoldMode = exports.FoldMode = function(voidElements) {
    BaseFoldMode.call(this);
    this.voidElements = voidElements || {};
};
oop.inherits(FoldMode, BaseFoldMode);

(function() {

    this.getFoldWidget = function(session, foldStyle, row) {
        var tag = this._getFirstTagInLine(session, row);

        if (tag.closing)
            return foldStyle == "markbeginend" ? "end" : "";

        if (!tag.tagName || this.voidElements[tag.tagName.toLowerCase()])
            return "";

        if (tag.selfClosing)
            return "";

        if (tag.value.indexOf("/" + tag.tagName) !== -1)
            return "";

        return "start";
    };
    
    this._getFirstTagInLine = function(session, row) {
        var tokens = session.getTokens(row, row)[0].tokens;
        var value = "";
        for (var i = 0; i < tokens.length; i++) {
            var token = tokens[i];
            if (token.type.indexOf("meta.tag") === 0)
                value += token.value;
            else
                value += lang.stringRepeat(" ", token.value.length);
        }
        
        return this._parseTag(value);
    };

    this.tagRe = /^(\s*)(<?(\/?)([-_a-zA-Z0-9:!]*)\s*(\/?)>?)/;
    this._parseTag = function(tag) {
        
        var match = this.tagRe.exec(tag);
        var column = this.tagRe.lastIndex || 0;
        this.tagRe.lastIndex = 0;

        return {
            value: tag,
            match: match ? match[2] : "",
            closing: match ? !!match[3] : false,
            selfClosing: match ? !!match[5] || match[2] == "/>" : false,
            tagName: match ? match[4] : "",
            column: match[1] ? column + match[1].length : column
        };
    };
    
    /*
     * reads a full tag and places the iterator after the tag
     */
    this._readTagForward = function(iterator) {
        var token = iterator.getCurrentToken();
        if (!token)
            return null;
            
        var value = "";
        var start;
        
        do {
            if (token.type.indexOf("meta.tag") === 0) {
                if (!start) {
                    var start = {
                        row: iterator.getCurrentTokenRow(),
                        column: iterator.getCurrentTokenColumn()
                    };
                }
                value += token.value;
                if (value.indexOf(">") !== -1) {
                    var tag = this._parseTag(value);
                    tag.start = start;
                    tag.end = {
                        row: iterator.getCurrentTokenRow(),
                        column: iterator.getCurrentTokenColumn() + token.value.length
                    };
                    iterator.stepForward();
                    return tag;
                }
            }
        } while(token = iterator.stepForward());
        
        return null;
    };
    
    this._readTagBackward = function(iterator) {
        var token = iterator.getCurrentToken();
        if (!token)
            return null;
            
        var value = "";
        var end;

        do {
            if (token.type.indexOf("meta.tag") === 0) {
                if (!end) {
                    end = {
                        row: iterator.getCurrentTokenRow(),
                        column: iterator.getCurrentTokenColumn() + token.value.length
                    };
                }
                value = token.value + value;
                if (value.indexOf("<") !== -1) {
                    var tag = this._parseTag(value);
                    tag.end = end;
                    tag.start = {
                        row: iterator.getCurrentTokenRow(),
                        column: iterator.getCurrentTokenColumn()
                    };
                    iterator.stepBackward();
                    return tag;
                }
            }
        } while(token = iterator.stepBackward());
        
        return null;
    };
    
    this._pop = function(stack, tag) {
        while (stack.length) {
            
            var top = stack[stack.length-1];
            if (!tag || top.tagName == tag.tagName) {
                return stack.pop();
            }
            else if (this.voidElements[tag.tagName]) {
                return;
            }
            else if (this.voidElements[top.tagName]) {
                stack.pop();
                continue;
            } else {
                return null;
            }
        }
    };
    
    this.getFoldWidgetRange = function(session, foldStyle, row) {
        var firstTag = this._getFirstTagInLine(session, row);
        
        if (!firstTag.match)
            return null;
        
        var isBackward = firstTag.closing || firstTag.selfClosing;
        var stack = [];
        var tag;
        
        if (!isBackward) {
            var iterator = new TokenIterator(session, row, firstTag.column);
            var start = {
                row: row,
                column: firstTag.column + firstTag.tagName.length + 2
            };
            while (tag = this._readTagForward(iterator)) {
                if (tag.selfClosing) {
                    if (!stack.length) {
                        tag.start.column += tag.tagName.length + 2;
                        tag.end.column -= 2;
                        return Range.fromPoints(tag.start, tag.end);
                    } else
                        continue;
                }
                
                if (tag.closing) {
                    this._pop(stack, tag);
                    if (stack.length == 0)
                        return Range.fromPoints(start, tag.start);
                }
                else {
                    stack.push(tag)
                }
            }
        }
        else {
            var iterator = new TokenIterator(session, row, firstTag.column + firstTag.match.length);
            var end = {
                row: row,
                column: firstTag.column
            };
            
            while (tag = this._readTagBackward(iterator)) {
                if (tag.selfClosing) {
                    if (!stack.length) {
                        tag.start.column += tag.tagName.length + 2;
                        tag.end.column -= 2;
                        return Range.fromPoints(tag.start, tag.end);
                    } else
                        continue;
                }
                
                if (!tag.closing) {
                    this._pop(stack, tag);
                    if (stack.length == 0) {
                        tag.start.column += tag.tagName.length + 2;
                        return Range.fromPoints(tag.start, end);
                    }
                }
                else {
                    stack.push(tag)
                }
            }
        }
        
    };

}).call(FoldMode.prototype);

});/* ***** 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):
 *      Fabian Jakobs <fabian AT ajax DOT org>
 *
 * 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 ***** */

ace.define('ace/mode/folding/fold_mode', ['require', 'exports', 'module' , 'ace/range'], function(require, exports, module) {
"use strict";

var Range = require("../../range").Range;

var FoldMode = exports.FoldMode = function() {};

(function() {

    this.foldingStartMarker = null;
    this.foldingStopMarker = null;

    // must return "" if there's no fold, to enable caching
    this.getFoldWidget = function(session, foldStyle, row) {
        var line = session.getLine(row);
        if (this.foldingStartMarker.test(line))
            return "start";
        if (foldStyle == "markbeginend"
                && this.foldingStopMarker
                && this.foldingStopMarker.test(line))
            return "end";
        return "";
    };
    
    this.getFoldWidgetRange = function(session, foldStyle, row) {
        return null;
    };

    this.indentationBlock = function(session, row, column) {
        var re = /^\s*/;
        var startRow = row;
        var endRow = row;
        var line = session.getLine(row);
        var startColumn = column || line.length;
        var startLevel = line.match(re)[0].length;
        var maxRow = session.getLength()
        
        while (++row < maxRow) {
            line = session.getLine(row);
            var level = line.match(re)[0].length;

            if (level == line.length)
                continue;

            if (level <= startLevel)
                break;

            endRow = row;
        }

        if (endRow > startRow) {
            var endColumn = session.getLine(endRow).length;
            return new Range(startRow, startColumn, endRow, endColumn);
        }
    };

    this.openingBracketBlock = function(session, bracket, row, column) {
        var start = {row: row, column: column + 1};
        var end = session.$findClosingBracket(bracket, start);
        if (!end)
            return;

        var fw = session.foldWidgets[end.row];
        if (fw == null)
            fw = this.getFoldWidget(session, end.row);

        if (fw == "start") {
            end.row --;
            end.column = session.getLine(end.row).length;
        }
        return Range.fromPoints(start, end);
    };

}).call(FoldMode.prototype);

});