File: D:/HostingSpaces/SBogers10/molen.komma.pro/wwwroot/css-js/jquery.calculation.js
/*
* jQuery Calculation Plug-in
*
* Copyright (c) 2007 Dan G. Switzer, II
*
* Dual licensed under the MIT and GPL licenses:
* http://www.opensource.org/licenses/mit-license.php
* http://www.gnu.org/licenses/gpl.html
*
* Revision: 12
* Version: 0.4.08
*
* Revision History
* v0.4.08
* - Added missing semi-colon to lines
*
* v0.4.07
* - Added trim to parseNumber to fix issue with whitespace in elements
*
* v0.4.06
* - Added support for calc() "format" callback so that if return value
* is null, then value is not updated
* - Added jQuery.isFunction() check for calc() callbacks
*
* v0.4.05
* - Added support to the sum() & calc() method for automatically fixing precision
* issues (will detect the max decimal spot in the number and fix to that
* depth)
*
* v0.4.04
* - Fixed bug #5420 by adding the defaults.cleanseNumber handler; you can
* override this function to handle stripping number of extra digits
*
* v0.4.02
* - Fixed bug where bind parameter was not being detecting if you specified
* a string in method like sum(), avg(), etc.
*
* v0.4a
* - Fixed bug in aggregate functions so that a string is passed to jQuery's
* text() method (since numeric zero is interpetted as false)
*
* v0.4
* - Added support for -$.99 values
* - Fixed regex so that decimal values without leading zeros are correctly
* parsed
* - Removed defaults.comma setting
* - Changed secondary regex that cleans additional formatting from parsed
* number
*
* v0.3
* - Refactored the aggregate methods (since they all use the same core logic)
* to use the $.extend() method
* - Added support for negative numbers in the regex)
* - Added min/max aggregate methods
* - Added defaults.onParseError and defaults.onParseClear methods to add logic for
* parsing errors
*
* v0.2
* - Fixed bug in sMethod in calc() (was using getValue, should have been setValue)
* - Added arguments for sum() to allow auto-binding with callbacks
* - Added arguments for avg() to allow auto-binding with callbacks
*
* v0.1a
* - Added semi-colons after object declaration (for min protection)
*
* v0.1
* - First public release
*
*/
(function($){
// set the defaults
var defaults = {
// regular expression used to detect numbers, if you want to force the field to contain
// numbers, you can add a ^ to the beginning or $ to the end of the regex to force the
// the regex to match the entire string: /^(-|-\$)?(\d+(,\d{3})*(\.\d{1,})?|\.\d{1,})$/g
reNumbers: /(-|-\$)?(\d+(,\d{3})*(\.\d{1,})?|\.\d{1,})/g
// this function is used in the parseNumber() to cleanse up any found numbers
// the function is intended to remove extra information found in a number such
// as extra commas and dollar signs. override this function to strip European values
, cleanseNumber: function (v){
// cleanse the number one more time to remove extra data (like commas and dollar signs)
// use this for European numbers: v.replace(/[^0-9,\-]/g, "").replace(/,/g, ".")
return v.replace(/[^0-9.\-]/g, "");
}
// should the Field plug-in be used for getting values of :input elements?
, useFieldPlugin: (!!$.fn.getValue)
// a callback function to run when an parsing error occurs
, onParseError: null
// a callback function to run once a parsing error has cleared
, onParseClear: null
};
// set default options
$.Calculation = {
version: "0.4.08",
setDefaults: function(options){
$.extend(defaults, options);
}
};
/*
* jQuery.fn.parseNumber()
*
* returns Array - detects the DOM element and returns it's value. input
* elements return the field value, other DOM objects
* return their text node
*
* NOTE: Breaks the jQuery chain, since it returns a Number.
*
* Examples:
* $("input[name^='price']").parseNumber();
* > This would return an array of potential number for every match in the selector
*
*/
// the parseNumber() method -- break the chain
$.fn.parseNumber = function(options){
var aValues = [];
options = $.extend(options, defaults);
this.each(
function (){
var
// get a pointer to the current element
$el = $(this),
// determine what method to get it's value
sMethod = ($el.is(":input") ? (defaults.useFieldPlugin ? "getValue" : "val") : "text"),
// parse the string and get the first number we find
v = $.trim($el[sMethod]()).match(defaults.reNumbers, "");
// if the value is null, use 0
if( v == null ){
v = 0; // update value
// if there's a error callback, execute it
if( jQuery.isFunction(options.onParseError) ) options.onParseError.apply($el, [sMethod]);
$.data($el[0], "calcParseError", true);
// otherwise we take the number we found and remove any commas
} else {
// clense the number one more time to remove extra data (like commas and dollar signs)
v = options.cleanseNumber.apply(this, [v[0]]);
// if there's a clear callback, execute it
if( $.data($el[0], "calcParseError") && jQuery.isFunction(options.onParseClear) ){
options.onParseClear.apply($el, [sMethod]);
// clear the error flag
$.data($el[0], "calcParseError", false);
}
}
aValues.push(parseFloat(v, 10));
}
);
// return an array of values
return aValues;
};
/*
* jQuery.fn.calc()
*
* returns Number - performance a calculation and updates the field
*
* Examples:
* $("input[name='price']").calc();
* > This would return the sum of all the fields named price
*
*/
// the calc() method
$.fn.calc = function(expr, vars, cbFormat, cbDone){
var
// create a pointer to the jQuery object
$this = this
// the value determine from the expression
, exprValue = ""
// track the precision to use
, precision = 0
// a pointer to the current jQuery element
, $el
// store an altered copy of the vars
, parsedVars = {}
// temp variable
, tmp
// the current method to use for updating the value
, sMethod
// a hash to store the local variables
, _
// track whether an error occured in the calculation
, bIsError = false;
// look for any jQuery objects and parse the results into numbers
for( var k in vars ){
// replace the keys in the expression
expr = expr.replace( (new RegExp("(" + k + ")", "g")), "_.$1");
if( !!vars[k] && !!vars[k].jquery ){
parsedVars[k] = vars[k].parseNumber();
} else {
parsedVars[k] = vars[k];
}
}
this.each(
function (i, el){
var p, len;
// get a pointer to the current element
$el = $(this);
// determine what method to get it's value
sMethod = ($el.is(":input") ? (defaults.useFieldPlugin ? "setValue" : "val") : "text");
// initialize the hash vars
_ = {};
for( var k in parsedVars ){
if( typeof parsedVars[k] == "number" ){
_[k] = parsedVars[k];
} else if( typeof parsedVars[k] == "string" ){
_[k] = parseFloat(parsedVars[k], 10);
} else if( !!parsedVars[k] && (parsedVars[k] instanceof Array) ) {
// if the length of the array is the same as number of objects in the jQuery
// object we're attaching to, use the matching array value, otherwise use the
// value from the first array item
tmp = (parsedVars[k].length == $this.length) ? i : 0;
_[k] = parsedVars[k][tmp];
}
// if we're not a number, make it 0
if( isNaN(_[k]) ) _[k] = 0;
// check for decimals and check the precision
p = _[k].toString().match(/\.\d+$/gi);
len = (p) ? p[0].length-1 : 0;
// track the highest level of precision
if( len > precision ) precision = len;
}
// try the calculation
try {
exprValue = eval( expr );
// fix any the precision errors
if( precision ) exprValue = Number(exprValue.toFixed(Math.max(precision, 4)));
// if there's a format callback, call it now
if( jQuery.isFunction(cbFormat) ){
// get return value
var tmp = cbFormat.apply(this, [exprValue]);
// if we have a returned value (it's null null) use it
if( !!tmp ) exprValue = tmp;
}
// if there's an error, capture the error output
} catch(e){
exprValue = e;
bIsError = true;
}
// update the value
$el[sMethod](exprValue.toString());
}
);
// if there's a format callback, call it now
if( jQuery.isFunction(cbDone) ) cbDone.apply(this, [this]);
return this;
};
/*
* Define all the core aggregate functions. All of the following methods
* have the same functionality, but they perform different aggregate
* functions.
*
* If this methods are called without any arguments, they will simple
* perform the specified aggregate function and return the value. This
* will break the jQuery chain.
*
* However, if you invoke the method with any arguments then a jQuery
* object is returned, which leaves the chain intact.
*
*
* jQuery.fn.sum()
* returns Number - the sum of all fields
*
* jQuery.fn.avg()
* returns Number - the avg of all fields
*
* jQuery.fn.min()
* returns Number - the minimum value in the field
*
* jQuery.fn.max()
* returns Number - the maximum value in the field
*
* Examples:
* $("input[name='price']").sum();
* > This would return the sum of all the fields named price
*
* $("input[name='price1'], input[name='price2'], input[name='price3']").sum();
* > This would return the sum of all the fields named price1, price2 or price3
*
* $("input[name^=sum]").sum("keyup", "#totalSum");
* > This would update the element with the id "totalSum" with the sum of all the
* > fields whose name started with "sum" anytime the keyup event is triggered on
* > those field.
*
* NOTE: The syntax above is valid for any of the aggregate functions
*
*/
$.each(["sum", "avg", "min", "max"], function (i, method){
$.fn[method] = function (bind, selector){
// if no arguments, then return the result of the aggregate function
if( arguments.length == 0 )
return math[method](this.parseNumber());
// if the selector is an options object, get the options
var bSelOpt = selector && (selector.constructor == Object) && !(selector instanceof jQuery);
// configure the options for this method
var opt = bind && bind.constructor == Object ? bind : {
bind: bind || "keyup"
, selector: (!bSelOpt) ? selector : null
, oncalc: null
};
// if the selector is an options object, extend the options
if( bSelOpt ) opt = jQuery.extend(opt, selector);
// if the selector exists, make sure it's a jQuery object
if( !!opt.selector ) opt.selector = $(opt.selector);
var self = this
, sMethod
, doCalc = function (){
// preform the aggregate function
var value = math[method](self.parseNumber(opt));
// check to make sure we have a selector
if( !!opt.selector ){
// determine how to set the value for the selector
sMethod = (opt.selector.is(":input") ? (defaults.useFieldPlugin ? "setValue" : "val") : "text");
// update the value
opt.selector[sMethod](value.toString());
}
// if there's a callback, run it now
if( jQuery.isFunction(opt.oncalc) ) opt.oncalc.apply(self, [value, opt]);
};
// perform the aggregate function now, to ensure init values are updated
doCalc();
// bind the doCalc function to run each time a key is pressed
return self.bind(opt.bind, doCalc);
}
});
/*
* Mathmatical functions
*/
var math = {
// sum an array
sum: function (a){
var total = 0, precision = 0;
// loop through the value and total them
$.each(a, function (i, v){
// check for decimals and check the precision
var p = v.toString().match(/\.\d+$/gi), len = (p) ? p[0].length-1 : 0;
// track the highest level of precision
if( len > precision ) precision = len;
// we add 0 to the value to ensure we get a numberic value
total += v;
});
// fix any the precision errors
if( precision ) total = Number(total.toFixed(precision));
// return the values as a comma-delimited string
return total;
},
// average an array
avg: function (a){
// return the values as a comma-delimited string
return math.sum(a)/a.length;
},
// lowest number in array
min: function (a){
return Math.min.apply(Math, a);
},
// highest number in array
max: function (a){
return Math.max.apply(Math, a);
}
};
})(jQuery);