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            var strippedPartialLine = partialLine.replace(/\s*$/g, "");
            var ispaces = partialLine.length - strippedPartialLine.length;

            if (difference > 0) {
                this.$editor.session.getDocument().insertInLine({row: row, column: it + 1}, Array(difference + 1).join(" ") + "\t");
                this.$editor.session.getDocument().removeInLine(row, it, it + 1);

                bias += difference;
            }

            if (difference < 0 && ispaces >= -difference) {
                this.$editor.session.getDocument().removeInLine(row, it + difference, it);
                bias += difference;
            }
        }
    };
    this.$izip_longest = function(iterables) {
        if (!iterables[0])
            return [];
        var longest = iterables[0].length;
        var iterablesLength = iterables.length;

        for (var i = 1; i < iterablesLength; i++) {
            var iLength = iterables[i].length;
            if (iLength > longest)
                longest = iLength;
        }

        var expandedSet = [];

        for (var l = 0; l < longest; l++) {
            var set = [];
            for (var i = 0; i < iterablesLength; i++) {
                if (iterables[i][l] === "")
                    set.push(NaN);
                else
                    set.push(iterables[i][l]);
            }

            expandedSet.push(set);
        }


        return expandedSet;
    };
    this.$izip = function(widths, tabs) {
        var size = widths.length >= tabs.length ? tabs.length : widths.length;

        var expandedSet = [];
        for (var i = 0; i < size; i++) {
            var set = [ widths[i], tabs[i] ];
            expandedSet.push(set);
        }
        return expandedSet;
    };

}).call(ElasticTabstopsLite.prototype);

exports.ElasticTabstopsLite = ElasticTabstopsLite;

var Editor = require("../editor").Editor;
require("../config").defineOptions(Editor.prototype, "editor", {
    useElasticTabstops: {
        set: function(val) {
            if (val) {
                if (!this.elasticTabstops)
                    this.elasticTabstops = new ElasticTabstopsLite(this);
                this.commands.on("afterExec", this.elasticTabstops.onAfterExec);
                this.commands.on("exec", this.elasticTabstops.onExec);
                this.on("change", this.elasticTabstops.onChange);
            } else if (this.elasticTabstops) {
                this.commands.removeListener("afterExec", this.elasticTabstops.onAfterExec);
                this.commands.removeListener("exec", this.elasticTabstops.onExec);
                this.removeListener("change", this.elasticTabstops.onChange);
            }
        }
    }
});

});                (function() {
                    window.require(["ace/ext/elastic_tabstops_lite"], function(m) {
                        if (typeof module == "object" && typeof exports == "object" && module) {
                            module.exports = m;
                        }
                    });
                })();