RN: @react-native/normalize-color support Node.js

Summary:
Changes `react-native/normalize-color` to be useable from Node.js by making the following changes:

1. Rename `base.js` to `index.js` so importing is more convenient.
2. Move Flow definitions into a seprate library definition flow so `index.js` can be consumed directly.

I also made a few improvements to the actual implementation:

1. Avoid allocating `matchers` for non-strings.
2. Avoid allocating an object of all the color keywords. This will reduce memory usage (in exchange for slightly larger compiled bytecode).

Changelog:
[General][Changed] - react-native/normalize-color now supports Node.js

Reviewed By: lunaleaps

Differential Revision: D30595908

fbshipit-source-id: e6279e9ff815d8d1f489811187deabfdf53b8fbf

Libraries/StyleSheet/__tests__/normalizeColor-test.js

@@ -13,13 +13,11 @@
 const {OS} = require('../../Utilities/Platform');
 const normalizeColor = require('../normalizeColor');
 
-it('forwards calls to @react-native/normalize-color/base', () => {
-  jest
-    .resetModules()
-    .mock('@react-native/normalize-color/base', () => jest.fn());
+it('forwards calls to @react-native/normalize-color', () => {
+  jest.resetModules().mock('@react-native/normalize-color', () => jest.fn());
 
   expect(require('../normalizeColor')('#abc')).not.toBe(null);
-  expect(require('@react-native/normalize-color/base')).toBeCalled();
+  expect(require('@react-native/normalize-color')).toBeCalled();
 });
 
 describe('iOS', () => {

Libraries/StyleSheet/normalizeColor.js

@@ -10,7 +10,7 @@
 
 /* eslint no-bitwise: 0 */
 
-import normalizeColorBase from '@react-native/normalize-color/base';
+import _normalizeColor from '@react-native/normalize-color';
 
 import type {ColorValue} from './StyleSheet';
 import type {ProcessedColorValue} from './processColor';
@@ -27,7 +27,7 @@ function normalizeColor(
   }
 
   if (typeof color === 'string' || typeof color === 'number') {
-    return normalizeColorBase(color);
+    return _normalizeColor(color);
   }
 }
 

package.json

@@ -94,7 +94,7 @@
     "@react-native-community/cli-platform-android": "^6.0.0",
     "@react-native-community/cli-platform-ios": "^6.0.0",
     "@react-native/assets": "1.0.0",
-    "@react-native/normalize-color": "1.0.0",
+    "@react-native/normalize-color": "2.0.0",
     "@react-native/polyfills": "2.0.0",
     "abort-controller": "^3.0.0",
     "anser": "^1.4.9",

packages/normalize-color/__tests__/normalizeColor-test.js

@@ -0,0 +1,131 @@
+/**
+ * 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.
+ *
+ * @emails oncall+react_native
+ * @flow stroct
+ * @format
+ */
+
+'use strict';
+
+import normalizeColor from '..';
+
+it('accepts only spec compliant colors', () => {
+  expect(normalizeColor('#abc')).not.toBe(null);
+  expect(normalizeColor('#abcd')).not.toBe(null);
+  expect(normalizeColor('#abcdef')).not.toBe(null);
+  expect(normalizeColor('#abcdef01')).not.toBe(null);
+  expect(normalizeColor('rgb(1,2,3)')).not.toBe(null);
+  expect(normalizeColor('rgb(1, 2, 3)')).not.toBe(null);
+  expect(normalizeColor('rgb(   1   , 2   , 3   )')).not.toBe(null);
+  expect(normalizeColor('rgb(-1, -2, -3)')).not.toBe(null);
+  expect(normalizeColor('rgba(0, 0, 0, 1)')).not.toBe(null);
+  expect(normalizeColor(0x01234567 + 0.5)).toBe(null);
+  expect(normalizeColor(-1)).toBe(null);
+  expect(normalizeColor(0xffffffff + 1)).toBe(null);
+});
+
+it('temporarilys accept floating point values for rgb', () => {
+  expect(normalizeColor('rgb(1.1, 2.1, 3.1)')).toBe(0x010203ff);
+  expect(normalizeColor('rgba(1.1, 2.1, 3.1, 1.0)')).toBe(0x010203ff);
+});
+
+it('refuses non-spec compliant colors', () => {
+  expect(normalizeColor('#00gg00')).toBe(null);
+  expect(normalizeColor('rgb(1, 2, 3,)')).toBe(null);
+  expect(normalizeColor('rgb(1, 2, 3')).toBe(null);
+
+  // Used to be accepted by normalizeColor
+  expect(normalizeColor('abc')).toBe(null);
+  expect(normalizeColor(' #abc ')).toBe(null);
+  expect(normalizeColor('##abc')).toBe(null);
+  expect(normalizeColor('rgb 255 0 0')).toBe(null);
+  expect(normalizeColor('RGBA(0, 1, 2)')).toBe(null);
+  expect(normalizeColor('rgb (0, 1, 2)')).toBe(null);
+  expect(normalizeColor('hsv(0, 1, 2)')).toBe(null);
+  // $FlowExpectedError - Intentionally malformed argument.
+  expect(normalizeColor({r: 10, g: 10, b: 10})).toBe(null);
+  expect(normalizeColor('hsl(1%, 2, 3)')).toBe(null);
+  expect(normalizeColor('rgb(1%, 2%, 3%)')).toBe(null);
+});
+
+it('handles hex6 properly', () => {
+  expect(normalizeColor('#000000')).toBe(0x000000ff);
+  expect(normalizeColor('#ffffff')).toBe(0xffffffff);
+  expect(normalizeColor('#ff00ff')).toBe(0xff00ffff);
+  expect(normalizeColor('#abcdef')).toBe(0xabcdefff);
+  expect(normalizeColor('#012345')).toBe(0x012345ff);
+});
+
+it('handles hex3 properly', () => {
+  expect(normalizeColor('#000')).toBe(0x000000ff);
+  expect(normalizeColor('#fff')).toBe(0xffffffff);
+  expect(normalizeColor('#f0f')).toBe(0xff00ffff);
+});
+
+it('handles hex8 properly', () => {
+  expect(normalizeColor('#00000000')).toBe(0x00000000);
+  expect(normalizeColor('#ffffffff')).toBe(0xffffffff);
+  expect(normalizeColor('#ffff00ff')).toBe(0xffff00ff);
+  expect(normalizeColor('#abcdef01')).toBe(0xabcdef01);
+  expect(normalizeColor('#01234567')).toBe(0x01234567);
+});
+
+it('handles rgb properly', () => {
+  expect(normalizeColor('rgb(0, 0, 0)')).toBe(0x000000ff);
+  expect(normalizeColor('rgb(-1, -2, -3)')).toBe(0x000000ff);
+  expect(normalizeColor('rgb(0, 0, 255)')).toBe(0x0000ffff);
+  expect(normalizeColor('rgb(100, 15, 69)')).toBe(0x640f45ff);
+  expect(normalizeColor('rgb(255, 255, 255)')).toBe(0xffffffff);
+  expect(normalizeColor('rgb(256, 256, 256)')).toBe(0xffffffff);
+});
+
+it('handles rgba properly', () => {
+  expect(normalizeColor('rgba(0, 0, 0, 0.0)')).toBe(0x00000000);
+  expect(normalizeColor('rgba(0, 0, 0, 0)')).toBe(0x00000000);
+  expect(normalizeColor('rgba(0, 0, 0, -0.5)')).toBe(0x00000000);
+  expect(normalizeColor('rgba(0, 0, 0, 1.0)')).toBe(0x000000ff);
+  expect(normalizeColor('rgba(0, 0, 0, 1)')).toBe(0x000000ff);
+  expect(normalizeColor('rgba(0, 0, 0, 1.5)')).toBe(0x000000ff);
+  expect(normalizeColor('rgba(100, 15, 69, 0.5)')).toBe(0x640f4580);
+});
+
+it('handles hsl properly', () => {
+  expect(normalizeColor('hsl(0, 0%, 0%)')).toBe(0x000000ff);
+  expect(normalizeColor('hsl(360, 100%, 100%)')).toBe(0xffffffff);
+  expect(normalizeColor('hsl(180, 50%, 50%)')).toBe(0x40bfbfff);
+  expect(normalizeColor('hsl(540, 50%, 50%)')).toBe(0x40bfbfff);
+  expect(normalizeColor('hsl(70, 25%, 75%)')).toBe(0xcacfafff);
+  expect(normalizeColor('hsl(70, 100%, 75%)')).toBe(0xeaff80ff);
+  expect(normalizeColor('hsl(70, 110%, 75%)')).toBe(0xeaff80ff);
+  expect(normalizeColor('hsl(70, 0%, 75%)')).toBe(0xbfbfbfff);
+  expect(normalizeColor('hsl(70, -10%, 75%)')).toBe(0xbfbfbfff);
+});
+
+it('handles hsla properly', () => {
+  expect(normalizeColor('hsla(0, 0%, 0%, 0)')).toBe(0x00000000);
+  expect(normalizeColor('hsla(360, 100%, 100%, 1)')).toBe(0xffffffff);
+  expect(normalizeColor('hsla(360, 100%, 100%, 0)')).toBe(0xffffff00);
+  expect(normalizeColor('hsla(180, 50%, 50%, 0.2)')).toBe(0x40bfbf33);
+});
+
+it('handles named colors properly', () => {
+  expect(normalizeColor('red')).toBe(0xff0000ff);
+  expect(normalizeColor('transparent')).toBe(0x00000000);
+  expect(normalizeColor('peachpuff')).toBe(0xffdab9ff);
+});
+
+it('handles number colors properly', () => {
+  expect(normalizeColor(0x00000000)).toBe(0x00000000);
+  expect(normalizeColor(0xff0000ff)).toBe(0xff0000ff);
+  expect(normalizeColor(0xffffffff)).toBe(0xffffffff);
+  expect(normalizeColor(0x01234567)).toBe(0x01234567);
+});
+
+it('returns the same color when it is already normalized', () => {
+  const normalizedColor = normalizeColor('red') || 0;
+  expect(normalizeColor(normalizedColor)).toBe(normalizedColor);
+});