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Contents
var utils = require('../utils')
, nodes = require('../nodes');
/**
* Color component name map.
*/
var componentMap = {
red: 'r'
, green: 'g'
, blue: 'b'
, alpha: 'a'
, hue: 'h'
, saturation: 's'
, lightness: 'l'
};
/**
* Color component unit type map.
*/
var unitMap = {
hue: 'deg'
, saturation: '%'
, lightness: '%'
};
/**
* Color type map.
*/
var typeMap = {
red: 'rgba'
, blue: 'rgba'
, green: 'rgba'
, alpha: 'rgba'
, hue: 'hsla'
, saturation: 'hsla'
, lightness: 'hsla'
};
/**
* Return component `name` for the given `color`.
*
* @param {RGBA|HSLA} color
* @param {String} name
* @return {Unit}
* @api public
*/
module.exports = function component(color, name) {
utils.assertColor(color, 'color');
utils.assertString(name, 'name');
var name = name.string
, unit = unitMap[name]
, type = typeMap[name]
, name = componentMap[name];
if (!name) throw new Error('invalid color component "' + name + '"');
return new nodes.Unit(color[type][name], unit);
};
Version data entries
39 entries across 20 versions & 2 rubygems