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/*
Input Mask plugin extensions
http://github.com/RobinHerbots/jquery.inputmask
Copyright (c) 2010 - 2014 Robin Herbots
Licensed under the MIT license (http://www.opensource.org/licenses/mit-license.php)
Version: 0.0.0

Optional extensions on the jquery.inputmask base
*/
(function ($) {
    //number aliases
    $.extend($.inputmask.defaults.aliases, {
        'decimal': {
            mask: "~",
            placeholder: "",
            repeat: "*",
            greedy: false,
            numericInput: false,
            isNumeric: true,
            digits: "*", //number of fractionalDigits
            groupSeparator: "",//",", // | "."
            radixPoint: ".",
            groupSize: 3,
            autoGroup: false,
            allowPlus: true,
            allowMinus: true,
            //todo
            integerDigits: "*", //number of integerDigits
            defaultValue: "",
            prefix: "",
            suffix: "",

//todo
            getMaskLength: function (buffer, greedy, repeat, currentBuffer, opts) { //custom getMaskLength to take the groupSeparator into account
                var calculatedLength = buffer.length;

if (!greedy) {
                    if (repeat == "*") {
                        calculatedLength = currentBuffer.length + 1;
                    } else if (repeat > 1) {
                        calculatedLength += (buffer.length * (repeat - 1));
                    }
                }

return reformatOnly ? pos : newPos;
            },
            regex: {
                number: function (opts) {
                    var escapedGroupSeparator = $.inputmask.escapeRegex.call(this, opts.groupSeparator);
                    var escapedRadixPoint = $.inputmask.escapeRegex.call(this, opts.radixPoint);
                    var digitExpression = isNaN(opts.digits) ? opts.digits : '{0,' + opts.digits + '}';
                    var signedExpression = opts.allowPlus || opts.allowMinus ? "[" + (opts.allowPlus ? "\+" : "") + (opts.allowMinus ? "-" : "") + "]?" : "";
                    return new RegExp("^" + signedExpression + "(\\d+|\\d{1," + opts.groupSize + "}((" + escapedGroupSeparator + "\\d{" + opts.groupSize + "})?)+)(" + escapedRadixPoint + "\\d" + digitExpression + ")?$");
                }
            },
            onKeyDown: function (e, buffer, opts) {
                var $input = $(this), input = this;
                if (e.keyCode == opts.keyCode.TAB) {
                    var radixPosition = $.inArray(opts.radixPoint, buffer);
                    if (radixPosition != -1) {
                        var masksets = $input.data('_inputmask')['masksets'];
                        var activeMasksetIndex = $input.data('_inputmask')['activeMasksetIndex'];
                        for (var i = 1; i <= opts.digits && i < opts.getMaskLength(masksets[activeMasksetIndex]["_buffer"], masksets[activeMasksetIndex]["greedy"], masksets[activeMasksetIndex]["repeat"], buffer, opts) ; i++) {
                            if (buffer[radixPosition + i] == undefined || buffer[radixPosition + i] == "") buffer[radixPosition + i] = "0";
                        }
                        input._valueSet(buffer.join(''));
                    }
                } else if (e.keyCode == opts.keyCode.DELETE || e.keyCode == opts.keyCode.BACKSPACE) {
                    opts.postFormat(buffer, 0, true, opts);
                    input._valueSet(buffer.join(''));
                    return true;
                }
            },
            definitions: {
                '~': { //real number
                    validator: function (chrs, buffer, pos, strict, opts) {
                        if (chrs == "") return false;
                        if (!strict && pos <= 1 && buffer[0] === '0' && new RegExp("[\\d-]").test(chrs) && buffer.join('').length == 1) { //handle first char
                            buffer[0] = "";
                            return { "pos": 0 };
                        }

var cbuf = strict ? buffer.slice(0, pos) : buffer.slice();

cbuf.splice(pos, 0, chrs);
                        var bufferStr = cbuf.join('');

//strip groupseparator
                        var escapedGroupSeparator = $.inputmask.escapeRegex.call(this, opts.groupSeparator);
                        bufferStr = bufferStr.replace(new RegExp(escapedGroupSeparator, "g"), '');

var isValid = opts.regex.number(opts).test(bufferStr);
                        if (!isValid) {
                            //let's help the regex a bit
                            bufferStr += "0";
                            isValid = opts.regex.number(opts).test(bufferStr);
                            if (!isValid) {
                                //make a valid group
                                var lastGroupSeparator = bufferStr.lastIndexOf(opts.groupSeparator);
                                for (var i = bufferStr.length - lastGroupSeparator; i <= 3; i++) {
                                    bufferStr += "0";
                                }

isValid = opts.regex.number(opts).test(bufferStr);
                                if (!isValid && !strict) {
                                    if (chrs == opts.radixPoint) {
                                        isValid = opts.regex.number(opts).test("0" + bufferStr + "0");
                                        if (isValid) {
                                            buffer[pos] = "0";
                                            pos++;
                                            return { "pos": pos };
                                        }
                                    }
                                }
                            }
                        }

if (isValid != false && !strict && chrs != opts.radixPoint) {
                            var newPos = opts.postFormat(buffer, pos, false, opts);
                            return { "pos": newPos };
                        }

return isValid;
                    },
                    cardinality: 1,
                    prevalidator: null
                }
            },
            insertMode: true,
            autoUnmask: false
        },
        'integer': {
            regex: {
                number: function (opts) {
                    var escapedGroupSeparator = $.inputmask.escapeRegex.call(this, opts.groupSeparator);
                    var signedExpression = opts.allowPlus || opts.allowMinus ? "[" + (opts.allowPlus ? "\+" : "") + (opts.allowMinus ? "-" : "") + "]?" : "";
                    return new RegExp("^" + signedExpression + "(\\d+|\\d{1," + opts.groupSize + "}((" + escapedGroupSeparator + "\\d{" + opts.groupSize + "})?)+)$");
                }
            },
            alias: "decimal"
        }
    });
})(jQuery);

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