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 * Copyright (c) 2012, Ajax.org B.V.
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 *       notice, this list of conditions and the following disclaimer.
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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.
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define(function (require, exports, module) {
    "use strict";

    var oop = require("../lib/oop");
    var TextMode = require("./text").Mode;
    var LogiQLHighlightRules = require("./logiql_highlight_rules").LogiQLHighlightRules;
    var FoldMode = require("./folding/coffee").FoldMode;
    var TokenIterator = require("../token_iterator").TokenIterator;
    var Range = require("../range").Range;
    var CstyleBehaviour = require("./behaviour/cstyle").CstyleBehaviour;
    var MatchingBraceOutdent = require("./matching_brace_outdent").MatchingBraceOutdent;

    var Mode = function () {
        this.HighlightRules = LogiQLHighlightRules;
        this.foldingRules = new FoldMode();
        this.$outdent = new MatchingBraceOutdent();
        this.$behaviour = new CstyleBehaviour();
    };
    oop.inherits(Mode, TextMode);

    (function () {
        this.lineCommentStart = "//";
        this.blockComment = {start: "/*", end: "*/"};

        this.getNextLineIndent = function (state, line, tab) {
            var indent = this.$getIndent(line);

            var tokenizedLine = this.getTokenizer().getLineTokens(line, state);
            var tokens = tokenizedLine.tokens;
            var endState = tokenizedLine.state;
            if (/comment|string/.test(endState))
                return indent;
            if (tokens.length && tokens[tokens.length - 1].type == "comment.single")
                return indent;

            var match = line.match();
            if (/(-->|<--|<-|->|{)\s*$/.test(line))
                indent += tab;
            return indent;
        };

        this.checkOutdent = function (state, line, input) {
            if (this.$outdent.checkOutdent(line, input))
                return true;

            if (input !== "\n" && input !== "\r\n")
                return false;

            if (!/^\s+/.test(line))
                return false;

            return true;
        };

        this.autoOutdent = function (state, doc, row) {
            if (this.$outdent.autoOutdent(doc, row))
                return;
            var prevLine = doc.getLine(row);
            var match = prevLine.match(/^\s+/);
            var column = prevLine.lastIndexOf(".") + 1;
            if (!match || !row || !column) return 0;

            var line = doc.getLine(row + 1);
            var startRange = this.getMatching(doc, {row: row, column: column});
            if (!startRange || startRange.start.row == row) return 0;

            column = match[0].length;
            var indent = this.$getIndent(doc.getLine(startRange.start.row));
            doc.replace(new Range(row + 1, 0, row + 1, column), indent);
        };

        this.getMatching = function (session, row, column) {
            if (row == undefined)
                row = session.selection.lead
            if (typeof row == "object") {
                column = row.column;
                row = row.row;
            }

            var startToken = session.getTokenAt(row, column);
            var KW_START = "keyword.start", KW_END = "keyword.end";
            var tok;
            if (!startToken)
                return;
            if (startToken.type == KW_START) {
                var it = new TokenIterator(session, row, column);
                it.step = it.stepForward;
            } else if (startToken.type == KW_END) {
                var it = new TokenIterator(session, row, column);
                it.step = it.stepBackward;
            } else
                return;

            while (tok = it.step()) {
                if (tok.type == KW_START || tok.type == KW_END)
                    break;
            }
            if (!tok || tok.type == startToken.type)
                return;

            var col = it.getCurrentTokenColumn();
            var row = it.getCurrentTokenRow();
            return new Range(row, col, row, col + tok.value.length);
        };
        this.$id = "ace/mode/logiql";
    }).call(Mode.prototype);

    exports.Mode = Mode;
});