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 *
 * Copyright (c) 2010, Ajax.org B.V.
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 *       notice, this list of conditions and the following disclaimer.
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 *       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 WorkerClient = require("../worker/worker_client").WorkerClient;
    var oop = require("../lib/oop");
    var TextMode = require("./text").Mode;
    var TextHighlightRules = require("./text_highlight_rules").TextHighlightRules;
    var XQueryLexer = require("./xquery/xquery_lexer").XQueryLexer;
    var Range = require("../range").Range;
    var XQueryBehaviour = require("./behaviour/xquery").XQueryBehaviour;
    var CStyleFoldMode = require("./folding/cstyle").FoldMode;
    var Anchor = require("../anchor").Anchor;

    var Mode = function () {
        this.$tokenizer = new XQueryLexer();
        this.$behaviour = new XQueryBehaviour();
        this.foldingRules = new CStyleFoldMode();
        this.$highlightRules = new TextHighlightRules();
    };
    oop.inherits(Mode, TextMode);

    (function () {

        this.completer = {
            getCompletions: function (editor, session, pos, prefix, callback) {
                if (!session.$worker)
                    return callback();
                session.$worker.emit("complete", {data: {pos: pos, prefix: prefix}});
                session.$worker.on("complete", function (e) {
                    callback(null, e.data);
                });
            }
        };

        this.getNextLineIndent = function (state, line, tab) {
            var indent = this.$getIndent(line);
            var match = line.match(/\s*(?:then|else|return|[{\(]|<\w+>)\s*$/);
            if (match)
                indent += tab;
            return indent;
        };

        this.checkOutdent = function (state, line, input) {
            if (!/^\s+$/.test(line))
                return false;

            return (/^\s*[\}\)]/).test(input);
        };

        this.autoOutdent = function (state, doc, row) {
            var line = doc.getLine(row);
            var match = line.match(/^(\s*[\}\)])/);

            if (!match) return 0;

            var column = match[1].length;
            var openBracePos = doc.findMatchingBracket({row: row, column: column});

            if (!openBracePos || openBracePos.row == row) return 0;

            var indent = this.$getIndent(doc.getLine(openBracePos.row));
            doc.replace(new Range(row, 0, row, column - 1), indent);
        };

        this.toggleCommentLines = function (state, doc, startRow, endRow) {
            var i, line;
            var outdent = true;
            var re = /^\s*\(:(.*):\)/;

            for (i = startRow; i <= endRow; i++) {
                if (!re.test(doc.getLine(i))) {
                    outdent = false;
                    break;
                }
            }

            var range = new Range(0, 0, 0, 0);
            for (i = startRow; i <= endRow; i++) {
                line = doc.getLine(i);
                range.start.row = i;
                range.end.row = i;
                range.end.column = line.length;

                doc.replace(range, outdent ? line.match(re)[1] : "(:" + line + ":)");
            }
        };

        this.createWorker = function (session) {

            var worker = new WorkerClient(["ace"], "ace/mode/xquery_worker", "XQueryWorker");
            var that = this;

            worker.attachToDocument(session.getDocument());

            worker.on("ok", function (e) {
                session.clearAnnotations();
            });

            worker.on("markers", function (e) {
                session.clearAnnotations();
                that.addMarkers(e.data, session);
            });

            worker.on("highlight", function (tokens) {
                that.$tokenizer.tokens = tokens.data.tokens;
                that.$tokenizer.lines = session.getDocument().getAllLines();

                var rows = Object.keys(that.$tokenizer.tokens);
                for (var i = 0; i < rows.length; i++) {
                    var row = parseInt(rows[i]);
                    delete session.bgTokenizer.lines[row];
                    delete session.bgTokenizer.states[row];
                    session.bgTokenizer.fireUpdateEvent(row, row);
                }
            });

            return worker;
        };

        this.removeMarkers = function (session) {
            var markers = session.getMarkers(false);
            for (var id in markers) {
                // All language analysis' markers are prefixed with language_highlight
                if (markers[id].clazz.indexOf('language_highlight_') === 0) {
                    session.removeMarker(id);
                }
            }
            for (var i = 0; i < session.markerAnchors.length; i++) {
                session.markerAnchors[i].detach();
            }
            session.markerAnchors = [];
        };

        this.addMarkers = function (annos, mySession) {
            var _self = this;

            if (!mySession.markerAnchors) mySession.markerAnchors = [];
            this.removeMarkers(mySession);
            mySession.languageAnnos = [];
            annos.forEach(function (anno) {
                // Certain annotations can temporarily be disabled
                //if (_self.disabledMarkerTypes[anno.type])
                //    return;
                // Multi-line markers are not supported, and typically are a result from a bad error recover, ignore
                //if(anno.pos.el && anno.pos.sl !== anno.pos.el)
                //    return;
                // Using anchors here, to automaticaly move markers as text around the marker is updated
                var anchor = new Anchor(mySession.getDocument(), anno.pos.sl, anno.pos.sc || 0);
                mySession.markerAnchors.push(anchor);
                var markerId;
                var colDiff = anno.pos.ec - anno.pos.sc;
                var rowDiff = anno.pos.el - anno.pos.sl;
                var gutterAnno = {
                    guttertext: anno.message,
                    type: anno.level || "warning",
                    text: anno.message
                    // row will be filled in updateFloat()
                };

                function updateFloat(single) {
                    if (markerId)
                        mySession.removeMarker(markerId);
                    gutterAnno.row = anchor.row;
                    if (anno.pos.sc !== undefined && anno.pos.ec !== undefined) {
                        var range = new Range(anno.pos.sl, anno.pos.sc, anno.pos.el, anno.pos.ec);
                        //var range = Range.fromPoints(anchor.getPosition(), {
                        //    row: anchor.row + rowDiff,
                        //    column: anchor.column + colDiff
                        //});
                        markerId = mySession.addMarker(range, "language_highlight_" + (anno.type ? anno.type : "default"));
                    }
                    if (single) mySession.setAnnotations(mySession.languageAnnos);
                }

                updateFloat();
                anchor.on("change", function () {
                    updateFloat(true);
                });
                if (anno.message) mySession.languageAnnos.push(gutterAnno);
            });
            mySession.setAnnotations(mySession.languageAnnos);
        };

        this.$id = "ace/mode/xquery";
    }).call(Mode.prototype);

    exports.Mode = Mode;
});
