react-native-macos/Libraries/StyleSheet/processColor.js

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/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @format
 * @flow strict-local
 */


'use strict';

const Platform = require('../Utilities/Platform');

const normalizeColor = require('../Color/normalizeColor');
import type {NativeOrDynamicColorType} from '../Color/NativeOrDynamicColorType'; // ]TODO(macOS ISS#2323203)

/* eslint no-bitwise: 0 */
function processColor(
  color?: ?(string | number | NativeOrDynamicColorType),
): ?(number | NativeOrDynamicColorType) /* TODO(macOS ISS#2323203) */ {
  if (color === undefined || color === null) {
    return color;
  }

  let int32Color = normalizeColor(color);
  if (int32Color === null || int32Color === undefined) {
    return undefined;
  }

  if (typeof int32Color === 'object') {
    const processColorObject = require('processColorObject'); // TODO(macOS ISS#2323203)

    const processedColorObj = processColorObject(int32Color);

    if (processedColorObj !== null) {
      return processedColorObj;
    }
  }

  if (typeof int32Color !== 'number') {
    return null;
  } // ]TODO(macOS ISS#2323203)

  // Converts 0xrrggbbaa into 0xaarrggbb
  int32Color = ((int32Color << 24) | (int32Color >>> 8)) >>> 0;

  if (Platform.OS === 'android') {
    // Android use 32 bit *signed* integer to represent the color
    // We utilize the fact that bitwise operations in JS also operates on
    // signed 32 bit integers, so that we can use those to convert from
    // *unsigned* to *signed* 32bit int that way.
    int32Color = int32Color | 0x0;
  }
  return int32Color;
}

module.exports = processColor;