/**
|
* Take input from [0, n] and return it as [0, 1]
|
* @hidden
|
*/
|
export function bound01(n, max) {
|
if (isOnePointZero(n)) {
|
n = '100%';
|
}
|
var isPercent = isPercentage(n);
|
n = max === 360 ? n : Math.min(max, Math.max(0, parseFloat(n)));
|
// Automatically convert percentage into number
|
if (isPercent) {
|
n = parseInt(String(n * max), 10) / 100;
|
}
|
// Handle floating point rounding errors
|
if (Math.abs(n - max) < 0.000001) {
|
return 1;
|
}
|
// Convert into [0, 1] range if it isn't already
|
if (max === 360) {
|
// If n is a hue given in degrees,
|
// wrap around out-of-range values into [0, 360] range
|
// then convert into [0, 1].
|
n = (n < 0 ? (n % max) + max : n % max) / parseFloat(String(max));
|
}
|
else {
|
// If n not a hue given in degrees
|
// Convert into [0, 1] range if it isn't already.
|
n = (n % max) / parseFloat(String(max));
|
}
|
return n;
|
}
|
/**
|
* Force a number between 0 and 1
|
* @hidden
|
*/
|
export function clamp01(val) {
|
return Math.min(1, Math.max(0, val));
|
}
|
/**
|
* Need to handle 1.0 as 100%, since once it is a number, there is no difference between it and 1
|
* <http://stackoverflow.com/questions/7422072/javascript-how-to-detect-number-as-a-decimal-including-1-0>
|
* @hidden
|
*/
|
export function isOnePointZero(n) {
|
return typeof n === 'string' && n.indexOf('.') !== -1 && parseFloat(n) === 1;
|
}
|
/**
|
* Check to see if string passed in is a percentage
|
* @hidden
|
*/
|
export function isPercentage(n) {
|
return typeof n === 'string' && n.indexOf('%') !== -1;
|
}
|
/**
|
* Return a valid alpha value [0,1] with all invalid values being set to 1
|
* @hidden
|
*/
|
export function boundAlpha(a) {
|
a = parseFloat(a);
|
if (isNaN(a) || a < 0 || a > 1) {
|
a = 1;
|
}
|
return a;
|
}
|
/**
|
* Replace a decimal with it's percentage value
|
* @hidden
|
*/
|
export function convertToPercentage(n) {
|
if (n <= 1) {
|
return "".concat(Number(n) * 100, "%");
|
}
|
return n;
|
}
|
/**
|
* Force a hex value to have 2 characters
|
* @hidden
|
*/
|
export function pad2(c) {
|
return c.length === 1 ? '0' + c : String(c);
|
}
|
