mirror of https://github.com/jkjoy/sunpeiwen.git
37 lines
750 B
JavaScript
37 lines
750 B
JavaScript
|
var nodes = require('../nodes')
|
||
|
|
, hsla = require('./hsla')
|
||
|
|
, component = require('./component');
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Return the hue component of the given `color`,
|
||
|
|
* or set the hue component to the optional second `value` argument.
|
||
|
|
*
|
||
|
|
* Examples:
|
||
|
|
*
|
||
|
|
* hue(#00c)
|
||
|
|
* // => 240deg
|
||
|
|
*
|
||
|
|
* hue(#00c, 90deg)
|
||
|
|
* // => #6c0
|
||
|
|
*
|
||
|
|
* @param {RGBA|HSLA} color
|
||
|
|
* @param {Unit} [value]
|
||
|
|
* @return {Unit|RGBA}
|
||
|
|
* @api public
|
||
|
|
*/
|
||
|
|
|
||
|
|
function hue(color, value){
|
||
|
|
if (value) {
|
||
|
|
var hslaColor = color.hsla;
|
||
|
|
return hsla(
|
||
|
|
value,
|
||
|
|
new nodes.Unit(hslaColor.s),
|
||
|
|
new nodes.Unit(hslaColor.l),
|
||
|
|
new nodes.Unit(hslaColor.a)
|
||
|
|
)
|
||
|
|
}
|
||
|
|
return component(color, new nodes.String('hue'));
|
||
|
|
};
|
||
|
|
hue.params = ['color', 'value'];
|
||
|
|
module.exports = hue;
|