react-native-wheel-picker-expo/lib/commonjs/util.js

React Native wheel picker like iOS

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.adaptiveColor = exports.setAlphaColor = void 0;

const setAlphaColor = (color, opacity = 1) => {
  let newColor = color;

  if (!newColor.startsWith('#') || newColor.length !== 7) {
    console.warn('Make sure you set with full hex color value. Ex: #F00F00');
    newColor = '#FFFFFF';
  }

  if (opacity === 1) return newColor;

  const _opacity = Math.round(Math.min(Math.max(opacity, 0), 1) * 255);

  return newColor + _opacity.toString(16).toUpperCase();
};

exports.setAlphaColor = setAlphaColor;

const adaptiveColor = backgroundColor => {
  const foregroundColor = ['#000000', '#FFFFFF'];

  try {
    /*eslint no-bitwise: ["error", { "allow": ["&", ">>"] }] */
    const bgColor = backgroundColor.substring(1);
    const rgb = parseInt(bgColor, 16);
    const red = rgb >> 16 & 0xff;
    const green = rgb >> 8 & 0xff;
    const blue = rgb >> 0 & 0xff;
    const brightness = 0.2126 * red + 0.7152 * green + 0.0722 * blue;
    return brightness > 128 ? foregroundColor[0] : foregroundColor[1];
  } catch (error) {
    return foregroundColor[0]; // return black by default
  }
};

exports.adaptiveColor = adaptiveColor;
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