kitchen-color-studio
Version:
an open-source color editor for designing color system
37 lines • 2.73 kB
JavaScript
function _slicedToArray(arr, i) { return _arrayWithHoles(arr) || _iterableToArrayLimit(arr, i) || _unsupportedIterableToArray(arr, i) || _nonIterableRest(); }
function _nonIterableRest() { throw new TypeError("Invalid attempt to destructure non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); }
function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }
function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) arr2[i] = arr[i]; return arr2; }
function _iterableToArrayLimit(arr, i) { var _i = null == arr ? null : "undefined" != typeof Symbol && arr[Symbol.iterator] || arr["@@iterator"]; if (null != _i) { var _s, _e, _x, _r, _arr = [], _n = !0, _d = !1; try { if (_x = (_i = _i.call(arr)).next, 0 === i) { if (Object(_i) !== _i) return; _n = !1; } else for (; !(_n = (_s = _x.call(_i)).done) && (_arr.push(_s.value), _arr.length !== i); _n = !0); } catch (err) { _d = !0, _e = err; } finally { try { if (!_n && null != _i.return && (_r = _i.return(), Object(_r) !== _r)) return; } finally { if (_d) throw _e; } } return _arr; } }
function _arrayWithHoles(arr) { if (Array.isArray(arr)) return arr; }
import chroma from 'chroma-js';
function isStableColor(color) {
return color >= 0 && color <= 255;
}
function arrayToRgb(rgbArray) {
if (rgbArray.length < 4) {
return "rgb(".concat(rgbArray.join(','), ")");
} else {
return "rgba(".concat(rgbArray.join(','), ")");
}
}
function getAlphaColor(frontColor, backgroundColor) {
var _chroma$rgb = chroma(frontColor).rgb(),
_chroma$rgb2 = _slicedToArray(_chroma$rgb, 3),
fR = _chroma$rgb2[0],
fG = _chroma$rgb2[1],
fB = _chroma$rgb2[2];
var _chroma$rgb3 = chroma(backgroundColor).rgb(),
_chroma$rgb4 = _slicedToArray(_chroma$rgb3, 3),
bR = _chroma$rgb4[0],
bG = _chroma$rgb4[1],
bB = _chroma$rgb4[2];
for (var fA = 0.01; fA <= 1; fA += 0.01) {
var r = Math.round((fR - bR * (1 - fA)) / fA);
var g = Math.round((fG - bG * (1 - fA)) / fA);
var b = Math.round((fB - bB * (1 - fA)) / fA);
if (isStableColor(r) && isStableColor(g) && isStableColor(b)) return chroma(arrayToRgb([r, g, b, Math.round(fA * 100) / 100])).hex();
}
return chroma(arrayToRgb([fR, fG, fB, 1])).hex();
}
export default getAlphaColor;