mirror of https://github.com/jkjoy/sunpeiwen.git
56 lines
1.3 KiB
JavaScript
56 lines
1.3 KiB
JavaScript
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var utils = require('../utils')
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, nodes = require('../nodes');
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/**
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* Convert the given `color` to an `HSLA` node,
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* or h,s,l,a component values.
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*
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* Examples:
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*
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* hsla(10deg, 50%, 30%, 0.5)
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* // => HSLA
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*
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* hsla(#ffcc00)
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* // => HSLA
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*
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* @param {RGBA|HSLA|Unit} hue
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* @param {Unit} saturation
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* @param {Unit} lightness
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* @param {Unit} alpha
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* @return {HSLA}
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* @api public
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*/
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function hsla(hue, saturation, lightness, alpha){
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switch (arguments.length) {
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case 1:
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utils.assertColor(hue);
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return hue.hsla;
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case 2:
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utils.assertColor(hue);
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var color = hue.hsla;
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utils.assertType(saturation, 'unit', 'alpha');
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var alpha = saturation.clone();
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if ('%' == alpha.type) alpha.val /= 100;
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return new nodes.HSLA(
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color.h
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, color.s
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, color.l
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, alpha.val);
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default:
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utils.assertType(hue, 'unit', 'hue');
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utils.assertType(saturation, 'unit', 'saturation');
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utils.assertType(lightness, 'unit', 'lightness');
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utils.assertType(alpha, 'unit', 'alpha');
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var alpha = alpha.clone();
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if (alpha && '%' == alpha.type) alpha.val /= 100;
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return new nodes.HSLA(
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hue.val
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, saturation.val
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, lightness.val
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, alpha.val);
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}
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};
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hsla.params = ['hue', 'saturation', 'lightness', 'alpha'];
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module.exports = hsla;
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