/**
 * @class Ext.util.Numbers
 * @singleton
 */

Ext.util.Numbers = {
    
    // detect toFixed implementation bug in IE
    toFixedBroken: (0.9).toFixed() != 1,
    
    
/**
     * Checks whether or not the current number is within a desired range.  If the number is already within the
     * range it is returned, otherwise the min or max value is returned depending on which side of the range is
     * exceeded.  Note that this method returns the constrained value but does not change the current number.
     * @param {Number} number The number to check
     * @param {Number} min The minimum number in the range
     * @param {Number} max The maximum number in the range
     * @return {Number} The constrained value if outside the range, otherwise the current value
     */
    constrain : function(number, min, max) {
        number = parseFloat(number);
        if (!isNaN(min)) {
            number = Math.max(number, min);
        }
        if (!isNaN(max)) {
            number = Math.min(number, max);
        }
        return number;
    },
    
    
/**
     * Formats a number using fixed-point notation
     * @param {Number} value The number to format
     * @param {Number} precision The number of digits to show after the decimal point
     */
    toFixed : function(value, precision) {
        if(Ext.util.Numbers.toFixedBroken) {
            precision = precision || 0;
            var pow = Math.pow(10, precision);
            return Math.round(value * pow) / pow;
        }
        return value.toFixed(precision);
    }
};