├── example
    ├── .expo-shared
    │   ├── assets.json
    │   └── README.md
    ├── src
    │   ├── App.tsx
    │   ├── AppTheme.tsx
    │   └── Example.tsx
    ├── index.js
    ├── tsconfig.json
    ├── babel.config.js
    ├── app.json
    ├── package.json
    ├── webpack.config.js
    └── metro.config.js
├── .gitattributes
├── tsconfig.build.json
├── babel.config.js
├── .github
    └── screenshot.png
├── .yarnrc
├── .editorconfig
├── scripts
    └── bootstrap.js
├── tsconfig.json
├── .gitignore
├── LICENSE
├── src
    ├── __tests__
    │   ├── createStyleSheet.test.ts
    │   └── makeStyles.test.tsx
    └── index.tsx
├── .circleci
    └── config.yml
├── package.json
├── README.md
└── CONTRIBUTING.md


/example/.expo-shared/assets.json:
--------------------------------------------------------------------------------
1 | {}
2 | 


--------------------------------------------------------------------------------
/.gitattributes:
--------------------------------------------------------------------------------
1 | *.pbxproj -text
2 | # specific for windows script files
3 | *.bat text eol=crlf


--------------------------------------------------------------------------------
/tsconfig.build.json:
--------------------------------------------------------------------------------
1 | 
2 | {
3 |   "extends": "./tsconfig",
4 |   "exclude": ["example"]
5 | }
6 | 


--------------------------------------------------------------------------------
/babel.config.js:
--------------------------------------------------------------------------------
1 | module.exports = {
2 |   presets: ['module:metro-react-native-babel-preset'],
3 | };
4 | 


--------------------------------------------------------------------------------
/.github/screenshot.png:
--------------------------------------------------------------------------------
https://raw.githubusercontent.com/ef-eng/react-native-swag-styles/HEAD/.github/screenshot.png


--------------------------------------------------------------------------------
/.yarnrc:
--------------------------------------------------------------------------------
1 | # Override Yarn command so we can automatically setup the repo on running `yarn`
2 | 
3 | yarn-path "scripts/bootstrap.js"
4 | 


--------------------------------------------------------------------------------
/example/src/App.tsx:
--------------------------------------------------------------------------------
 1 | import * as React from 'react';
 2 | import { Example } from './Example';
 3 | 
 4 | import { AppThemeProvider } from './AppTheme';
 5 | 
 6 | export const App = () => (
 7 |   <AppThemeProvider>
 8 |     <Example />
 9 |   </AppThemeProvider>
10 | );
11 | 


--------------------------------------------------------------------------------
/.editorconfig:
--------------------------------------------------------------------------------
 1 | # EditorConfig helps developers define and maintain consistent
 2 | # coding styles between different editors and IDEs
 3 | # editorconfig.org
 4 | 
 5 | root = true
 6 | 
 7 | [*]
 8 | 
 9 | indent_style = space
10 | indent_size = 2
11 | 
12 | end_of_line = lf
13 | charset = utf-8
14 | trim_trailing_whitespace = true
15 | insert_final_newline = true
16 | 


--------------------------------------------------------------------------------
/example/index.js:
--------------------------------------------------------------------------------
1 | import { registerRootComponent } from 'expo';
2 | 
3 | import { App } from './src/App';
4 | 
5 | // registerRootComponent calls AppRegistry.registerComponent('main', () => App);
6 | // It also ensures that whether you load the app in the Expo client or in a native build,
7 | // the environment is set up appropriately
8 | registerRootComponent(App);
9 | 


--------------------------------------------------------------------------------
/example/tsconfig.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "compilerOptions": {
 3 |     "jsx": "react-native",
 4 |     "target": "esnext",
 5 |     "lib": [
 6 |       "esnext"
 7 |     ],
 8 |     "allowJs": true,
 9 |     "skipLibCheck": true,
10 |     "noEmit": true,
11 |     "allowSyntheticDefaultImports": true,
12 |     "resolveJsonModule": true,
13 |     "esModuleInterop": true,
14 |     "moduleResolution": "node"
15 |   }
16 | }
17 | 


--------------------------------------------------------------------------------
/example/.expo-shared/README.md:
--------------------------------------------------------------------------------
 1 | > Why do I have a folder named ".expo-shared" in my project?
 2 | 
 3 | The ".expo-shared" folder is created when running commands that produce state that is intended to be shared with all developers on the project. For example, "npx expo-optimize".
 4 | 
 5 | > What does the "assets.json" file contain?
 6 | 
 7 | The "assets.json" file describes the assets that have been optimized through "expo-optimize" and do not need to be processed again.
 8 | 
 9 | > Should I commit the ".expo-shared" folder?
10 | 
11 | Yes, you should share the ".expo-shared" folder with your collaborators.
12 | 


--------------------------------------------------------------------------------
/example/babel.config.js:
--------------------------------------------------------------------------------
 1 | const path = require('path');
 2 | const pak = require('../package.json');
 3 | 
 4 | module.exports = function (api) {
 5 |   api.cache(true);
 6 | 
 7 |   return {
 8 |     presets: ['babel-preset-expo'],
 9 |     plugins: [
10 |       [
11 |         'module-resolver',
12 |         {
13 |           extensions: ['.tsx', '.ts', '.js', '.json'],
14 |           alias: {
15 |             // For development, we want to alias the library to the source
16 |             [pak.name]: path.join(__dirname, '..', pak.source),
17 |           },
18 |         },
19 |       ],
20 |     ],
21 |   };
22 | };
23 | 


--------------------------------------------------------------------------------
/example/app.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "react-native-swag-styles-example",
 3 |   "displayName": "Example for react-native-swag-styles",
 4 |   "expo": {
 5 |     "name": "react-native-swag-styles-example",
 6 |     "slug": "react-native-swag-styles-example",
 7 |     "description": "Example app for react-native-swag-styles",
 8 |     "privacy": "public",
 9 |     "version": "1.0.0",
10 |     "githubUrl": "https://github.com/ef-eng/react-native-swag-styles",
11 |     "platforms": [
12 |       "ios",
13 |       "android",
14 |       "web"
15 |     ],
16 |     "userInterfaceStyle": "automatic",
17 |     "ios": {
18 |       "supportsTablet": true
19 |     },
20 |     "assetBundlePatterns": [
21 |       "**/*"
22 |     ]
23 |   }
24 | }
25 | 


--------------------------------------------------------------------------------
/scripts/bootstrap.js:
--------------------------------------------------------------------------------
 1 | const path = require('path');
 2 | const child_process = require('child_process');
 3 | 
 4 | const root = path.resolve(__dirname, '..');
 5 | const args = process.argv.slice(2);
 6 | const options = {
 7 |   cwd: process.cwd(),
 8 |   env: process.env,
 9 |   stdio: 'inherit',
10 |   encoding: 'utf-8',
11 | };
12 | 
13 | let result;
14 | 
15 | if (process.cwd() !== root || args.length) {
16 |   // We're not in the root of the project, or additional arguments were passed
17 |   // In this case, forward the command to `yarn`
18 |   result = child_process.spawnSync('yarn', args, options);
19 | } else {
20 |   // If `yarn` is run without arguments, perform bootstrap
21 |   result = child_process.spawnSync('yarn', ['bootstrap'], options);
22 | }
23 | 
24 | process.exitCode = result.status;
25 | 


--------------------------------------------------------------------------------
/tsconfig.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "compilerOptions": {
 3 |     "baseUrl": "./",
 4 |     "paths": {
 5 |       "react-native-swag-styles": ["./src/index"]
 6 |     },
 7 |     "allowUnreachableCode": false,
 8 |     "allowUnusedLabels": false,
 9 |     "esModuleInterop": true,
10 |     "importsNotUsedAsValues": "error",
11 |     "forceConsistentCasingInFileNames": true,
12 |     "jsx": "react",
13 |     "lib": ["esnext"],
14 |     "module": "esnext",
15 |     "moduleResolution": "node",
16 |     "noFallthroughCasesInSwitch": true,
17 |     "noImplicitReturns": true,
18 |     "noImplicitUseStrict": false,
19 |     "noStrictGenericChecks": false,
20 |     "noUnusedLocals": true,
21 |     "noUnusedParameters": true,
22 |     "resolveJsonModule": true,
23 |     "skipLibCheck": true,
24 |     "strict": true,
25 |     "target": "esnext"
26 |   }
27 | }
28 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
 1 | # OSX
 2 | #
 3 | .DS_Store
 4 | 
 5 | # XDE
 6 | .expo/
 7 | 
 8 | # VSCode
 9 | .vscode/
10 | jsconfig.json
11 | 
12 | # Xcode
13 | #
14 | build/
15 | *.pbxuser
16 | !default.pbxuser
17 | *.mode1v3
18 | !default.mode1v3
19 | *.mode2v3
20 | !default.mode2v3
21 | *.perspectivev3
22 | !default.perspectivev3
23 | xcuserdata
24 | *.xccheckout
25 | *.moved-aside
26 | DerivedData
27 | *.hmap
28 | *.ipa
29 | *.xcuserstate
30 | project.xcworkspace
31 | 
32 | # Android/IJ
33 | #
34 | .idea
35 | .gradle
36 | local.properties
37 | android.iml
38 | 
39 | # Cocoapods
40 | #
41 | example/ios/Pods
42 | 
43 | # node.js
44 | #
45 | node_modules/
46 | npm-debug.log
47 | yarn-debug.log
48 | yarn-error.log
49 | 
50 | # BUCK
51 | buck-out/
52 | \.buckd/
53 | android/app/libs
54 | android/keystores/debug.keystore
55 | 
56 | # Expo
57 | .expo/*
58 | 
59 | # generated by bob
60 | lib/
61 | 


--------------------------------------------------------------------------------
/example/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "react-native-swag-styles-example",
 3 |   "description": "Example app for react-native-swag-styles",
 4 |   "version": "0.0.1",
 5 |   "private": true,
 6 |   "main": "index",
 7 |   "scripts": {
 8 |     "android": "expo start --android",
 9 |     "ios": "expo start --ios",
10 |     "web": "expo start --web",
11 |     "start": "expo start",
12 |     "test": "jest"
13 |   },
14 |   "dependencies": {
15 |     "expo": "^40.0.0",
16 |     "expo-splash-screen": "~0.8.1",
17 |     "react": "16.13.1",
18 |     "react-dom": "16.13.1",
19 |     "react-native": "0.63.4",
20 |     "react-native-unimodules": "~0.12.0",
21 |     "react-native-web": "~0.14.9"
22 |   },
23 |   "devDependencies": {
24 |     "@babel/core": "~7.12.10",
25 |     "@babel/runtime": "^7.9.6",
26 |     "babel-plugin-module-resolver": "^4.0.0",
27 |     "babel-preset-expo": "8.3.0",
28 |     "expo-cli": "^4.0.13"
29 |   }
30 | }
31 | 


--------------------------------------------------------------------------------
/example/src/AppTheme.tsx:
--------------------------------------------------------------------------------
 1 | import * as React from 'react';
 2 | import { useColorScheme } from 'react-native';
 3 | 
 4 | interface AppTheme {
 5 |   fgColor: string;
 6 |   bgColor: string;
 7 | }
 8 | 
 9 | const LIGHT_THEME: AppTheme = {
10 |   fgColor: '#333',
11 |   bgColor: '#FFF',
12 | };
13 | 
14 | const DARK_THEME: AppTheme = {
15 |   fgColor: '#EEE',
16 |   bgColor: '#222',
17 | };
18 | 
19 | const AppThemeContext = React.createContext<AppTheme>(LIGHT_THEME);
20 | 
21 | export const AppThemeProvider = ({
22 |   children,
23 | }: {
24 |   children: React.ReactNode;
25 | }) => {
26 |   const colorScheme = useColorScheme();
27 |   const theme = colorScheme === 'dark' ? DARK_THEME : LIGHT_THEME;
28 |   return (
29 |     <AppThemeContext.Provider value={theme}>
30 |       {children}
31 |     </AppThemeContext.Provider>
32 |   );
33 | };
34 | 
35 | export const useAppTheme = (): AppTheme => React.useContext(AppThemeContext);
36 | 


--------------------------------------------------------------------------------
/example/webpack.config.js:
--------------------------------------------------------------------------------
 1 | const path = require('path');
 2 | const createExpoWebpackConfigAsync = require('@expo/webpack-config');
 3 | const { resolver } = require('./metro.config');
 4 | 
 5 | const root = path.resolve(__dirname, '..');
 6 | const node_modules = path.join(__dirname, 'node_modules');
 7 | 
 8 | module.exports = async function (env, argv) {
 9 |   const config = await createExpoWebpackConfigAsync(env, argv);
10 | 
11 |   config.module.rules.push({
12 |     test: /\.(js|jsx|ts|tsx)$/,
13 |     include: path.resolve(root, 'src'),
14 |     use: 'babel-loader',
15 |   });
16 | 
17 |   // We need to make sure that only one version is loaded for peerDependencies
18 |   // So we alias them to the versions in example's node_modules
19 |   Object.assign(config.resolve.alias, {
20 |     ...resolver.extraNodeModules,
21 |     'react-native-web': path.join(node_modules, 'react-native-web'),
22 |   });
23 | 
24 |   return config;
25 | };
26 | 


--------------------------------------------------------------------------------
/LICENSE:
--------------------------------------------------------------------------------
 1 | MIT License
 2 | 
 3 | Copyright (c) 2021 EF Education First
 4 | 
 5 | Permission is hereby granted, free of charge, to any person obtaining a copy
 6 | of this software and associated documentation files (the "Software"), to deal
 7 | in the Software without restriction, including without limitation the rights
 8 | to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 9 | copies of the Software, and to permit persons to whom the Software is
10 | furnished to do so, subject to the following conditions:
11 | 
12 | The above copyright notice and this permission notice shall be included in all
13 | copies or substantial portions of the Software.
14 | 
15 | THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 | IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 | FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
18 | AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 | LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
20 | OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
21 | SOFTWARE.
22 | 


--------------------------------------------------------------------------------
/example/metro.config.js:
--------------------------------------------------------------------------------
 1 | const path = require('path');
 2 | const blacklist = require('metro-config/src/defaults/blacklist');
 3 | const escape = require('escape-string-regexp');
 4 | const pak = require('../package.json');
 5 | 
 6 | const root = path.resolve(__dirname, '..');
 7 | 
 8 | const modules = Object.keys({
 9 |   ...pak.peerDependencies,
10 | });
11 | 
12 | module.exports = {
13 |   projectRoot: __dirname,
14 |   watchFolders: [root],
15 | 
16 |   // We need to make sure that only one version is loaded for peerDependencies
17 |   // So we blacklist them at the root, and alias them to the versions in example's node_modules
18 |   resolver: {
19 |     blacklistRE: blacklist(
20 |       modules.map(
21 |         (m) =>
22 |           new RegExp(`^${escape(path.join(root, 'node_modules', m))}\\/.*$`)
23 |       )
24 |     ),
25 | 
26 |     extraNodeModules: modules.reduce((acc, name) => {
27 |       acc[name] = path.join(__dirname, 'node_modules', name);
28 |       return acc;
29 |     }, {}),
30 |   },
31 | 
32 |   transformer: {
33 |     getTransformOptions: async () => ({
34 |       transform: {
35 |         experimentalImportSupport: false,
36 |         inlineRequires: true,
37 |       },
38 |     }),
39 |   },
40 | };
41 | 


--------------------------------------------------------------------------------
/example/src/Example.tsx:
--------------------------------------------------------------------------------
 1 | import * as React from 'react';
 2 | import { Button, View, Text, useWindowDimensions } from 'react-native';
 3 | import { makeStyles } from 'react-native-swag-styles';
 4 | 
 5 | import { useAppTheme } from './AppTheme';
 6 | 
 7 | export const Example = () => {
 8 |   const [toggle, setToggle] = React.useState<boolean>(false);
 9 |   const styles = useStyles(toggle);
10 | 
11 |   return (
12 |     <View style={styles.container}>
13 |       <View style={styles.box}>
14 |         <Text style={styles.text}>Box 1</Text>
15 |         <Button
16 |           title="Press Me"
17 |           color={styles.buttonColor}
18 |           onPress={() => setToggle((t) => !t)}
19 |         />
20 |       </View>
21 |       <View style={styles.box}>
22 |         <Text style={styles.text}>Box 2</Text>
23 |       </View>
24 |     </View>
25 |   );
26 | };
27 | 
28 | const useStyles = makeStyles(
29 |   useAppTheme,
30 |   useWindowDimensions,
31 |   /**
32 |    * @param theme from `useAppTheme`
33 |    * @param dimensions from `useWindowDimensions`
34 |    * @param toggle from argument of `useStyles`
35 |    */
36 |   (theme, { width, height }, toggle: boolean) => ({
37 |     container: {
38 |       flex: 1,
39 |       alignItems: 'center',
40 |       justifyContent: 'center',
41 |       backgroundColor: theme.bgColor,
42 |     },
43 |     box: {
44 |       width: Math.min(400, width),
45 |       height: height / 2 - 40,
46 |       marginVertical: 20,
47 |       backgroundColor: '#666',
48 |     },
49 |     text: {
50 |       textAlign: 'center',
51 |       color: theme.fgColor,
52 |     },
53 |     buttonColor: toggle ? '#F00' : '#0F0',
54 |   })
55 | );
56 | 


--------------------------------------------------------------------------------
/src/__tests__/createStyleSheet.test.ts:
--------------------------------------------------------------------------------
 1 | import { StyleSheet } from 'react-native';
 2 | 
 3 | import { createStyleSheet } from '../index';
 4 | 
 5 | const styleSheetCreate = jest.spyOn(StyleSheet, 'create');
 6 | 
 7 | describe('createStyleSheet', () => {
 8 |   afterEach(() => {
 9 |     jest.clearAllMocks();
10 |   });
11 | 
12 |   it('should create StyleSheet', () => {
13 |     styleSheetCreate.mockReturnValueOnce({
14 |       container: 1,
15 |       strikethrough: 2,
16 |       empty: 3,
17 |     } as any);
18 |     const styles = createStyleSheet({
19 |       underlayColor: '#333',
20 |       container: {
21 |         paddingTop: 24,
22 |         paddingBottom: 32,
23 |       },
24 |       someBoolean: false,
25 |       strikethrough: {
26 |         textDecorationLine: 'line-through',
27 |       },
28 |       empty: {},
29 |       size: 32,
30 |     });
31 |     expect(styles).toMatchInlineSnapshot(`
32 |       Object {
33 |         "container": 1,
34 |         "empty": 3,
35 |         "size": 32,
36 |         "someBoolean": false,
37 |         "strikethrough": 2,
38 |         "underlayColor": "#333",
39 |       }
40 |     `);
41 |     expect(styleSheetCreate).toHaveBeenCalledTimes(1);
42 |   });
43 | 
44 |   it('should work with empty input', () => {
45 |     const styles = createStyleSheet({});
46 |     expect(styles).toMatchInlineSnapshot(`Object {}`);
47 |     expect(styleSheetCreate).toHaveBeenCalledTimes(1);
48 |   });
49 | 
50 |   it('should throw if style does not conform to StyleSheet', () => {
51 |     expect(() =>
52 |       createStyleSheet({
53 |         underlayColor: '#333',
54 |         container: {
55 |           color: 'bar',
56 |         },
57 |         empty: {},
58 |         size: 32,
59 |       })
60 |     ).toThrowError();
61 |   });
62 | });
63 | 


--------------------------------------------------------------------------------
/.circleci/config.yml:
--------------------------------------------------------------------------------
 1 | version: 2.1
 2 | 
 3 | executors:
 4 |   default:
 5 |     docker:
 6 |       - image: cimg/node:12.22
 7 |     working_directory: ~/project
 8 | 
 9 | commands:
10 |   attach_project:
11 |     steps:
12 |       - attach_workspace:
13 |           at: ~/project
14 | 
15 | jobs:
16 |   install-dependencies:
17 |     executor: default
18 |     steps:
19 |       - checkout
20 |       - attach_project
21 |       - restore_cache:
22 |           keys:
23 |             - dependencies-{{ checksum "package.json" }}
24 |             - dependencies-
25 |       - restore_cache:
26 |           keys:
27 |             - dependencies-example-{{ checksum "example/package.json" }}
28 |             - dependencies-example-
29 |       - run:
30 |           name: Install dependencies
31 |           command: |
32 |             yarn install --cwd example --frozen-lockfile
33 |             yarn install --frozen-lockfile
34 |       - save_cache:
35 |           key: dependencies-{{ checksum "package.json" }}
36 |           paths: node_modules
37 |       - save_cache:
38 |           key: dependencies-example-{{ checksum "example/package.json" }}
39 |           paths: example/node_modules
40 |       - persist_to_workspace:
41 |           root: .
42 |           paths: .
43 | 
44 |   lint:
45 |     executor: default
46 |     steps:
47 |       - attach_project
48 |       - run:
49 |           name: Lint files
50 |           command: |
51 |             yarn lint
52 | 
53 |   typescript:
54 |     executor: default
55 |     steps:
56 |       - attach_project
57 |       - run:
58 |           name: Typecheck files
59 |           command: |
60 |             yarn typescript
61 | 
62 |   unit-tests:
63 |     executor: default
64 |     steps:
65 |       - attach_project
66 |       - run:
67 |           name: Run unit tests
68 |           command: |
69 |             yarn test --coverage
70 |       - store_artifacts:
71 |           path: coverage
72 |           destination: coverage
73 | 
74 |   build-package:
75 |     executor: default
76 |     steps:
77 |       - attach_project
78 |       - run:
79 |           name: Build package
80 |           command: |
81 |             yarn prepare
82 | 
83 | workflows:
84 |   build-and-test:
85 |     jobs:
86 |       - install-dependencies
87 |       - lint:
88 |           requires:
89 |             - install-dependencies
90 |       - typescript:
91 |           requires:
92 |             - install-dependencies
93 |       - unit-tests:
94 |           requires:
95 |             - install-dependencies
96 |       - build-package:
97 |           requires:
98 |             - install-dependencies
99 | 


--------------------------------------------------------------------------------
/src/index.tsx:
--------------------------------------------------------------------------------
  1 | import * as React from 'react';
  2 | import { ViewStyle, TextStyle, ImageStyle, StyleSheet } from 'react-native';
  3 | import memoize from 'fast-memoize';
  4 | 
  5 | type StyleValue = ViewStyle | TextStyle | ImageStyle;
  6 | type StyleConstant = number | string | boolean;
  7 | 
  8 | export type NamedStyles<T> = {
  9 |   [P in keyof T]: StyleValue | StyleConstant;
 10 | };
 11 | 
 12 | export type UseStyles<T, P extends Array<unknown> = []> = (
 13 |   ...args: P
 14 | ) => Readonly<T>;
 15 | 
 16 | interface MakeStyles {
 17 |   <T extends NamedStyles<T>, P extends Array<unknown>>(
 18 |     definition: (...args: P) => T | NamedStyles<T>
 19 |   ): UseStyles<T, P>;
 20 |   <T extends NamedStyles<T>, H, P extends Array<unknown>>(
 21 |     useHook: () => H,
 22 |     definition: (...args: [H, ...P]) => T | NamedStyles<T>
 23 |   ): UseStyles<T, P>;
 24 |   <T extends NamedStyles<T>, H1, H2, P extends Array<unknown>>(
 25 |     useHook1: () => H1,
 26 |     useHook2: () => H2,
 27 |     definition: (...args: [H1, H2, ...P]) => T | NamedStyles<T>
 28 |   ): UseStyles<T, P>;
 29 |   <T extends NamedStyles<T>, H1, H2, H3, P extends Array<unknown>>(
 30 |     useHook1: () => H1,
 31 |     useHook2: () => H2,
 32 |     useHook3: () => H3,
 33 |     definition: (...args: [H1, H2, H3, ...P]) => T | NamedStyles<T>
 34 |   ): UseStyles<T, P>;
 35 |   <T extends NamedStyles<T>, H1, H2, H3, H4, P extends Array<unknown>>(
 36 |     useHook1: () => H1,
 37 |     useHook2: () => H2,
 38 |     useHook3: () => H3,
 39 |     useHook4: () => H4,
 40 |     definition: (...args: [H1, H2, H3, H4, ...P]) => T | NamedStyles<T>
 41 |   ): UseStyles<T, P>;
 42 |   // add more here if we need more arguments
 43 | }
 44 | 
 45 | /**
 46 |  * Create a `useStyles` hook from any number of hooks and
 47 |  * a StyleSheet creator function
 48 |  *
 49 |  * *Note:* this method has to be called statically (outside render functions)
 50 |  */
 51 | export const makeStyles: MakeStyles = (
 52 |   // Strict type is declared above
 53 |   ...args: ReadonlyArray<any>
 54 | ) => {
 55 |   const definition = args[args.length - 1];
 56 |   const hooks = args.slice(0, args.length - 1);
 57 |   const memoCreateStyles = memoize(
 58 |     (...memoArgs) => {
 59 |       const styleSheet = definition(...memoArgs);
 60 |       return createStyleSheet(styleSheet);
 61 |     },
 62 |     // support variable number of arguments
 63 |     { strategy: memoize.strategies.variadic }
 64 |   );
 65 |   return (...props: ReadonlyArray<unknown>) => {
 66 |     const states = hooks.map((hook) => hook());
 67 |     return React.useMemo(
 68 |       () => memoCreateStyles(...states, ...props),
 69 |       // eslint-disable-next-line react-hooks/exhaustive-deps
 70 |       [...states, ...props]
 71 |     );
 72 |   };
 73 | };
 74 | 
 75 | /**
 76 |  * Create a StyleSheet from given object with support for constant values
 77 |  */
 78 | export const createStyleSheet = <T extends NamedStyles<T>>(
 79 |   definition: T | NamedStyles<T>
 80 | ): Readonly<T> => {
 81 |   // filter constant values
 82 |   const filteredStyleSheet = Object.entries<StyleValue | StyleConstant>(
 83 |     definition
 84 |   ).reduce<Record<string, StyleValue>>(
 85 |     (obj, [key, value]) =>
 86 |       isStyle(value) ? Object.assign(obj, { [key]: value }) : obj,
 87 |     {}
 88 |   );
 89 |   return {
 90 |     ...definition,
 91 |     ...StyleSheet.create(filteredStyleSheet),
 92 |   } as T;
 93 | };
 94 | 
 95 | const isStyle = (s: StyleValue | StyleConstant): s is StyleValue =>
 96 |   typeof s === 'object';
 97 | 
 98 | interface WithStylesRenderFunction<T, P = object> {
 99 |   (props: React.PropsWithChildren<P>, styles: T): React.ReactElement | null;
100 |   displayName?: string;
101 | }
102 | 
103 | /**
104 |  * Convenient higher-order component for attaching `useStyles` hook to components
105 |  */
106 | export const connectStyles =
107 |   <T extends NamedStyles<T>>(useStyles: UseStyles<T>) =>
108 |   <P extends object>(
109 |     render: WithStylesRenderFunction<T, P>
110 |   ): React.ComponentType<P> => {
111 |     const WrappedComponent = (props: P) => {
112 |       const styles = useStyles();
113 |       return render(props, styles);
114 |     };
115 |     WrappedComponent.displayName = `withStyles(${
116 |       render.displayName || render.name || 'Component'
117 |     })`;
118 |     return WrappedComponent;
119 |   };
120 | 


--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
  1 | {
  2 |   "name": "react-native-swag-styles",
  3 |   "version": "0.2.2",
  4 |   "description": "Swag Styles",
  5 |   "main": "lib/commonjs/index",
  6 |   "module": "lib/module/index",
  7 |   "types": "lib/typescript/index.d.ts",
  8 |   "react-native": "src/index",
  9 |   "source": "src/index",
 10 |   "files": [
 11 |     "src",
 12 |     "lib",
 13 |     "android",
 14 |     "ios",
 15 |     "cpp",
 16 |     "react-native-swag-styles.podspec",
 17 |     "!lib/typescript/example",
 18 |     "!android/build",
 19 |     "!ios/build",
 20 |     "!**/__tests__",
 21 |     "!**/__fixtures__",
 22 |     "!**/__mocks__"
 23 |   ],
 24 |   "scripts": {
 25 |     "test": "jest",
 26 |     "typescript": "tsc --noEmit",
 27 |     "lint": "eslint \"**/*.{js,ts,tsx}\"",
 28 |     "prepare": "bob build",
 29 |     "release": "release-it",
 30 |     "example": "yarn --cwd example",
 31 |     "pods": "cd example && pod-install --quiet",
 32 |     "bootstrap": "yarn example && yarn && yarn pods"
 33 |   },
 34 |   "keywords": [
 35 |     "react-native",
 36 |     "ios",
 37 |     "android"
 38 |   ],
 39 |   "repository": "https://github.com/ef-eng/react-native-swag-styles",
 40 |   "author": "Sirui Li <leethree@users.noreply.github.com> (https://github.com/leethree)",
 41 |   "license": "MIT",
 42 |   "bugs": {
 43 |     "url": "https://github.com/ef-eng/react-native-swag-styles/issues"
 44 |   },
 45 |   "homepage": "https://github.com/ef-eng/react-native-swag-styles#readme",
 46 |   "publishConfig": {
 47 |     "registry": "https://registry.npmjs.org/"
 48 |   },
 49 |   "dependencies": {
 50 |     "fast-memoize": "^2.5.2"
 51 |   },
 52 |   "devDependencies": {
 53 |     "@commitlint/config-conventional": "^11.0.0",
 54 |     "@react-native-community/eslint-config": "^2.0.0",
 55 |     "@release-it/conventional-changelog": "^2.0.0",
 56 |     "@testing-library/react-hooks": "^7.0.1",
 57 |     "@types/jest": "^26.0.0",
 58 |     "@types/react": "^16.9.19",
 59 |     "@types/react-native": "0.62.13",
 60 |     "commitlint": "^11.0.0",
 61 |     "eslint": "^7.2.0",
 62 |     "eslint-config-prettier": "^7.0.0",
 63 |     "eslint-plugin-prettier": "^3.1.3",
 64 |     "husky": "^4.2.5",
 65 |     "jest": "^26.0.1",
 66 |     "pod-install": "^0.1.0",
 67 |     "prettier": "^2.0.5",
 68 |     "react": "16.13.1",
 69 |     "react-native": "0.63.4",
 70 |     "react-native-builder-bob": "^0.18.1",
 71 |     "react-test-renderer": "^16.14.0",
 72 |     "release-it": "^14.2.2",
 73 |     "typescript": "^4.1.3"
 74 |   },
 75 |   "peerDependencies": {
 76 |     "react": "*",
 77 |     "react-native": "*"
 78 |   },
 79 |   "jest": {
 80 |     "preset": "react-native",
 81 |     "modulePathIgnorePatterns": [
 82 |       "<rootDir>/example/node_modules",
 83 |       "<rootDir>/lib/"
 84 |     ]
 85 |   },
 86 |   "husky": {
 87 |     "hooks": {
 88 |       "commit-msg": "commitlint -E HUSKY_GIT_PARAMS",
 89 |       "pre-commit": "yarn lint && yarn typescript"
 90 |     }
 91 |   },
 92 |   "commitlint": {
 93 |     "extends": [
 94 |       "@commitlint/config-conventional"
 95 |     ]
 96 |   },
 97 |   "release-it": {
 98 |     "git": {
 99 |       "commitMessage": "chore: release ${version}",
100 |       "tagName": "v${version}"
101 |     },
102 |     "npm": {
103 |       "publish": true
104 |     },
105 |     "github": {
106 |       "release": true
107 |     },
108 |     "plugins": {
109 |       "@release-it/conventional-changelog": {
110 |         "preset": "angular"
111 |       }
112 |     }
113 |   },
114 |   "eslintConfig": {
115 |     "root": true,
116 |     "extends": [
117 |       "@react-native-community",
118 |       "prettier"
119 |     ],
120 |     "rules": {
121 |       "prettier/prettier": [
122 |         "error",
123 |         {
124 |           "quoteProps": "consistent",
125 |           "singleQuote": true,
126 |           "tabWidth": 2,
127 |           "trailingComma": "es5",
128 |           "useTabs": false
129 |         }
130 |       ]
131 |     }
132 |   },
133 |   "eslintIgnore": [
134 |     "node_modules/",
135 |     "lib/"
136 |   ],
137 |   "prettier": {
138 |     "quoteProps": "consistent",
139 |     "singleQuote": true,
140 |     "tabWidth": 2,
141 |     "trailingComma": "es5",
142 |     "useTabs": false
143 |   },
144 |   "react-native-builder-bob": {
145 |     "source": "src",
146 |     "output": "lib",
147 |     "targets": [
148 |       "commonjs",
149 |       "module",
150 |       [
151 |         "typescript",
152 |         {
153 |           "project": "tsconfig.build.json"
154 |         }
155 |       ]
156 |     ]
157 |   }
158 | }
159 | 


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
  1 | # react-native-swag-styles
  2 | 
  3 | Dynamic Styles for React Native and Expo Web
  4 | 
  5 | [![CircleCI](https://img.shields.io/circleci/build/github/ef-eng/react-native-swag-styles/main)](https://circleci.com/gh/ef-eng/react-native-swag-styles/tree/main)
  6 | [![npm](https://img.shields.io/npm/v/react-native-swag-styles)](https://www.npmjs.com/package/react-native-swag-styles)
  7 | [![GitHub license](https://img.shields.io/github/license/ef-eng/react-native-swag-styles)](https://github.com/ef-eng/react-native-swag-styles/blob/main/LICENSE)
  8 | 
  9 | ## Highlights
 10 | 
 11 | - **Dynamic.** Based on React Hook. It automatically re-renders when necessary.
 12 | - **Unopinionated.** Use whatever component or theme library you want.
 13 | - **Simple to use.** No HOC, no special syntax. Easily migrate from plain StyleSheet.
 14 | - **Strictly typed.** Take full advantage of TypeScript. Get auto-completions in VSCode.
 15 | 
 16 | ![Screnshot](.github/screenshot.png)
 17 | 
 18 | ## Installation
 19 | 
 20 | ```sh
 21 | yarn add react-native-swag-styles
 22 | ```
 23 | 
 24 | ## Usage
 25 | 
 26 | Replace `StyleSheet.create` with `makeStyles` with callback:
 27 | 
 28 | ```diff
 29 | - import { StyleSheet } from 'react-native';
 30 | + import { makeStyles } from 'react-native-swag-styles';
 31 | 
 32 | - const styles = StyleSheet.create({
 33 | + const useStyles = makeStyles(() => ({
 34 |   underlayColor: '#333',
 35 |   container: {
 36 |     paddingTop: 24,
 37 |     paddingBottom: 32,
 38 |   },
 39 | -});
 40 | +}));
 41 | ```
 42 | 
 43 | Use created style hook in component:
 44 | 
 45 | ```tsx
 46 | const Foo = () => {
 47 |   const styles = useStyles();
 48 |   return (
 49 |     <View style={styles.container}>
 50 |       <TouchableHighlight underlayColor={styles.underlayColor} />
 51 |     </View>
 52 |   );
 53 | };
 54 | ```
 55 | 
 56 | To make the style dynamic, pass props to the style creator:
 57 | 
 58 | ```ts
 59 | const useStyles = makeStyles((small: boolean) => {
 60 |   const iconSize = small ? 16 : 24;
 61 |   return {
 62 |     icon: {
 63 |       width: iconSize,
 64 |       height: iconSize,
 65 |     },
 66 |     // ...
 67 |   };
 68 | });
 69 | 
 70 | const Foo = () => {
 71 |   const styles = useStyles(true);
 72 |   // ...
 73 | };
 74 | ```
 75 | 
 76 | ### Advanced Usage:
 77 | 
 78 | If you use a theming library, you can attach the theme hook when creating styles:
 79 | 
 80 | ```ts
 81 | const useStyles = makeStyles(
 82 |   useAppTheme,
 83 |   // first argument is the return value of your theme hook
 84 |   ({ colors, insets }) => ({
 85 |     underlayColor: colors.grey,
 86 |     container: {
 87 |       paddingTop: insets.top,
 88 |       paddingBottom: insets.bottom,
 89 |     },
 90 |   })
 91 | );
 92 | ```
 93 | 
 94 | You can also create styles using multiple hooks, as long as the hooks don’t take any argument:
 95 | 
 96 | ```ts
 97 | const useStyles = makeStyles(
 98 |   useAppTheme,
 99 |   useWideScreen,
100 |   useWindowDimensions,
101 |   // The order of arguments matches the order of hooks above
102 |   ({ colors, fonts }, isWideScreen, { width }) => {
103 |     // ...
104 |   }
105 | );
106 | ```
107 | 
108 | Pass hooks and extra props together to the style creator:
109 | 
110 | ```ts
111 | const useStyles = makeStyles(
112 |   useAppTheme,
113 |   useWideScreen,
114 |   ({ brandColor, colors, fonts }, isWideScreen, small: boolean) => {
115 |     // ...
116 |   }
117 | );
118 | ```
119 | 
120 | **Important Note:** Hook returns and props must be plain (serializable) object/values for memoization to work properly. See [fast-memoize.js](https://github.com/caiogondim/fast-memoize.js#function-arguments).
121 | 
122 | ### Other APIs
123 | 
124 | `createStyleSheet` extends `StyleSheet.create` to support constant values:
125 | 
126 | ```ts
127 | import { createStyleSheet } from 'react-native-swag-styles';
128 | 
129 | const styles = createStyleSheet({
130 |   text: 'some kind of string',
131 |   regularStyle: {
132 |     paddingTop: 24,
133 |     paddingBottom: 32,
134 |   },
135 | });
136 | ```
137 | 
138 | ## Example
139 | 
140 | To see a full working example, with a custom theme, check out the `example` folder.
141 | 
142 | ## Contributing
143 | 
144 | See the [contributing guide](CONTRIBUTING.md) to learn how to contribute to the repository and the development workflow.
145 | 
146 | ## Acknowledgements
147 | 
148 | Thanks to the authors of these libraries for inspiration:
149 | 
150 | - [native-theme](https://github.com/CarlosBalladares/native-theme)
151 | - [@material-ui/styles](https://material-ui.com/styles/basics/#hook-api)
152 | 
153 | ## License
154 | 
155 | MIT
156 | 


--------------------------------------------------------------------------------
/CONTRIBUTING.md:
--------------------------------------------------------------------------------
  1 | # Contributing
  2 | 
  3 | We want this community to be friendly and respectful to each other. Please follow it in all your interactions with the project.
  4 | 
  5 | ## Development workflow
  6 | 
  7 | To get started with the project, run `yarn` in the root directory to install the required dependencies for each package:
  8 | 
  9 | ```sh
 10 | yarn
 11 | ```
 12 | 
 13 | > While it's possible to use [`npm`](https://github.com/npm/cli), the tooling is built around [`yarn`](https://classic.yarnpkg.com/), so you'll have an easier time if you use `yarn` for development.
 14 | 
 15 | While developing, you can run the [example app](/example/) to test your changes. Any changes you make in your library's JavaScript code will be reflected in the example app without a rebuild. If you change any native code, then you'll need to rebuild the example app.
 16 | 
 17 | To start the packager:
 18 | 
 19 | ```sh
 20 | yarn example start
 21 | ```
 22 | 
 23 | To run the example app on Android:
 24 | 
 25 | ```sh
 26 | yarn example android
 27 | ```
 28 | 
 29 | To run the example app on iOS:
 30 | 
 31 | ```sh
 32 | yarn example ios
 33 | ```
 34 | 
 35 | To run the example app on Web:
 36 | 
 37 | ```sh
 38 | yarn example web
 39 | ```
 40 | 
 41 | Make sure your code passes TypeScript and ESLint. Run the following to verify:
 42 | 
 43 | ```sh
 44 | yarn typescript
 45 | yarn lint
 46 | ```
 47 | 
 48 | To fix formatting errors, run the following:
 49 | 
 50 | ```sh
 51 | yarn lint --fix
 52 | ```
 53 | 
 54 | Remember to add tests for your change if possible. Run the unit tests by:
 55 | 
 56 | ```sh
 57 | yarn test
 58 | ```
 59 | 
 60 | ### Commit message convention
 61 | 
 62 | We follow the [conventional commits specification](https://www.conventionalcommits.org/en) for our commit messages:
 63 | 
 64 | - `fix`: bug fixes, e.g. fix crash due to deprecated method.
 65 | - `feat`: new features, e.g. add new method to the module.
 66 | - `refactor`: code refactor, e.g. migrate from class components to hooks.
 67 | - `docs`: changes into documentation, e.g. add usage example for the module..
 68 | - `test`: adding or updating tests, e.g. add integration tests using detox.
 69 | - `chore`: tooling changes, e.g. change CI config.
 70 | 
 71 | Our pre-commit hooks verify that your commit message matches this format when committing.
 72 | 
 73 | ### Linting and tests
 74 | 
 75 | [ESLint](https://eslint.org/), [Prettier](https://prettier.io/), [TypeScript](https://www.typescriptlang.org/)
 76 | 
 77 | We use [TypeScript](https://www.typescriptlang.org/) for type checking, [ESLint](https://eslint.org/) with [Prettier](https://prettier.io/) for linting and formatting the code, and [Jest](https://jestjs.io/) for testing.
 78 | 
 79 | Our pre-commit hooks verify that the linter and tests pass when committing.
 80 | 
 81 | ### Publishing to npm
 82 | 
 83 | We use [release-it](https://github.com/release-it/release-it) to make it easier to publish new versions. It handles common tasks like bumping version based on semver, creating tags and releases etc.
 84 | 
 85 | To publish new versions, run the following:
 86 | 
 87 | ```sh
 88 | yarn release
 89 | ```
 90 | 
 91 | ### Scripts
 92 | 
 93 | The `package.json` file contains various scripts for common tasks:
 94 | 
 95 | - `yarn bootstrap`: setup project by installing all dependencies and pods.
 96 | - `yarn typescript`: type-check files with TypeScript.
 97 | - `yarn lint`: lint files with ESLint.
 98 | - `yarn test`: run unit tests with Jest.
 99 | - `yarn example start`: start the Metro server for the example app.
100 | - `yarn example android`: run the example app on Android.
101 | - `yarn example ios`: run the example app on iOS.
102 | 
103 | ### Sending a pull request
104 | 
105 | > **Working on your first pull request?** You can learn how from this _free_ series: [How to Contribute to an Open Source Project on GitHub](https://egghead.io/series/how-to-contribute-to-an-open-source-project-on-github).
106 | 
107 | When you're sending a pull request:
108 | 
109 | - Prefer small pull requests focused on one change.
110 | - Verify that linters and tests are passing.
111 | - Review the documentation to make sure it looks good.
112 | - Follow the pull request template when opening a pull request.
113 | - For pull requests that change the API or implementation, discuss with maintainers first by opening an issue.
114 | 
115 | ## Code of Conduct
116 | 
117 | ### Our Pledge
118 | 
119 | We as members, contributors, and leaders pledge to make participation in our community a harassment-free experience for everyone, regardless of age, body size, visible or invisible disability, ethnicity, sex characteristics, gender identity and expression, level of experience, education, socio-economic status, nationality, personal appearance, race, religion, or sexual identity and orientation.
120 | 
121 | We pledge to act and interact in ways that contribute to an open, welcoming, diverse, inclusive, and healthy community.
122 | 
123 | ### Our Standards
124 | 
125 | Examples of behavior that contributes to a positive environment for our community include:
126 | 
127 | - Demonstrating empathy and kindness toward other people
128 | - Being respectful of differing opinions, viewpoints, and experiences
129 | - Giving and gracefully accepting constructive feedback
130 | - Accepting responsibility and apologizing to those affected by our mistakes, and learning from the experience
131 | - Focusing on what is best not just for us as individuals, but for the overall community
132 | 
133 | Examples of unacceptable behavior include:
134 | 
135 | - The use of sexualized language or imagery, and sexual attention or
136 |   advances of any kind
137 | - Trolling, insulting or derogatory comments, and personal or political attacks
138 | - Public or private harassment
139 | - Publishing others' private information, such as a physical or email
140 |   address, without their explicit permission
141 | - Other conduct which could reasonably be considered inappropriate in a
142 |   professional setting
143 | 
144 | ### Enforcement Responsibilities
145 | 
146 | Community leaders are responsible for clarifying and enforcing our standards of acceptable behavior and will take appropriate and fair corrective action in response to any behavior that they deem inappropriate, threatening, offensive, or harmful.
147 | 
148 | Community leaders have the right and responsibility to remove, edit, or reject comments, commits, code, wiki edits, issues, and other contributions that are not aligned to this Code of Conduct, and will communicate reasons for moderation decisions when appropriate.
149 | 
150 | ### Scope
151 | 
152 | This Code of Conduct applies within all community spaces, and also applies when an individual is officially representing the community in public spaces. Examples of representing our community include using an official e-mail address, posting via an official social media account, or acting as an appointed representative at an online or offline event.
153 | 
154 | ### Enforcement
155 | 
156 | Instances of abusive, harassing, or otherwise unacceptable behavior may be reported to the community leaders responsible for enforcement at [INSERT CONTACT METHOD]. All complaints will be reviewed and investigated promptly and fairly.
157 | 
158 | All community leaders are obligated to respect the privacy and security of the reporter of any incident.
159 | 
160 | ### Enforcement Guidelines
161 | 
162 | Community leaders will follow these Community Impact Guidelines in determining the consequences for any action they deem in violation of this Code of Conduct:
163 | 
164 | #### 1. Correction
165 | 
166 | **Community Impact**: Use of inappropriate language or other behavior deemed unprofessional or unwelcome in the community.
167 | 
168 | **Consequence**: A private, written warning from community leaders, providing clarity around the nature of the violation and an explanation of why the behavior was inappropriate. A public apology may be requested.
169 | 
170 | #### 2. Warning
171 | 
172 | **Community Impact**: A violation through a single incident or series of actions.
173 | 
174 | **Consequence**: A warning with consequences for continued behavior. No interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, for a specified period of time. This includes avoiding interactions in community spaces as well as external channels like social media. Violating these terms may lead to a temporary or permanent ban.
175 | 
176 | #### 3. Temporary Ban
177 | 
178 | **Community Impact**: A serious violation of community standards, including sustained inappropriate behavior.
179 | 
180 | **Consequence**: A temporary ban from any sort of interaction or public communication with the community for a specified period of time. No public or private interaction with the people involved, including unsolicited interaction with those enforcing the Code of Conduct, is allowed during this period. Violating these terms may lead to a permanent ban.
181 | 
182 | #### 4. Permanent Ban
183 | 
184 | **Community Impact**: Demonstrating a pattern of violation of community standards, including sustained inappropriate behavior, harassment of an individual, or aggression toward or disparagement of classes of individuals.
185 | 
186 | **Consequence**: A permanent ban from any sort of public interaction within the community.
187 | 
188 | ### Attribution
189 | 
190 | This Code of Conduct is adapted from the [Contributor Covenant][homepage], version 2.0,
191 | available at https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
192 | 
193 | Community Impact Guidelines were inspired by [Mozilla's code of conduct enforcement ladder](https://github.com/mozilla/diversity).
194 | 
195 | [homepage]: https://www.contributor-covenant.org
196 | 
197 | For answers to common questions about this code of conduct, see the FAQ at
198 | https://www.contributor-covenant.org/faq. Translations are available at https://www.contributor-covenant.org/translations.
199 | 


--------------------------------------------------------------------------------
/src/__tests__/makeStyles.test.tsx:
--------------------------------------------------------------------------------
  1 | import * as React from 'react';
  2 | import { StyleSheet } from 'react-native';
  3 | import { renderHook } from '@testing-library/react-hooks';
  4 | 
  5 | import { makeStyles } from '../index';
  6 | 
  7 | const styleSheetCreate = jest.spyOn(StyleSheet, 'create');
  8 | 
  9 | describe('makeStyles', () => {
 10 |   afterEach(() => {
 11 |     jest.clearAllMocks();
 12 |   });
 13 | 
 14 |   it('should return useStyles hook', () => {
 15 |     const useStyles = makeStyles(() => ({
 16 |       underlayColor: '#333',
 17 |       container: {
 18 |         paddingTop: 24,
 19 |         paddingBottom: 32,
 20 |       },
 21 |     }));
 22 |     // styles should be lazily created
 23 |     expect(styleSheetCreate).not.toHaveBeenCalled();
 24 | 
 25 |     const { result } = renderHook(() => useStyles());
 26 |     expect(result.current).toMatchInlineSnapshot(`
 27 |       Object {
 28 |         "container": Object {
 29 |           "paddingBottom": 32,
 30 |           "paddingTop": 24,
 31 |         },
 32 |         "underlayColor": "#333",
 33 |       }
 34 |     `);
 35 |     expect(styleSheetCreate).toBeCalledTimes(1);
 36 |     expect(styleSheetCreate).toBeCalledWith({
 37 |       container: {
 38 |         paddingTop: 24,
 39 |         paddingBottom: 32,
 40 |       },
 41 |     });
 42 |   });
 43 | 
 44 |   it('should support prop', () => {
 45 |     const useStyles = makeStyles((small: boolean) => {
 46 |       const iconSize = small ? 16 : 24;
 47 |       return {
 48 |         icon: {
 49 |           width: iconSize,
 50 |           height: iconSize,
 51 |         },
 52 |       };
 53 |     });
 54 |     // styles should be lazily created
 55 |     expect(styleSheetCreate).not.toHaveBeenCalled();
 56 | 
 57 |     const { result, rerender } = renderHook((props) => useStyles(props), {
 58 |       initialProps: false,
 59 |     });
 60 |     expect(result.current).toMatchInlineSnapshot(`
 61 |       Object {
 62 |         "icon": Object {
 63 |           "height": 24,
 64 |           "width": 24,
 65 |         },
 66 |       }
 67 |     `);
 68 |     expect(styleSheetCreate).toBeCalledTimes(1);
 69 | 
 70 |     rerender(true);
 71 | 
 72 |     expect(result.current).toMatchInlineSnapshot(`
 73 |       Object {
 74 |         "icon": Object {
 75 |           "height": 16,
 76 |           "width": 16,
 77 |         },
 78 |       }
 79 |     `);
 80 |     expect(styleSheetCreate).toBeCalledTimes(2);
 81 |   });
 82 | 
 83 |   it('should memoize StyleSheet result', () => {
 84 |     const styleCallback = jest.fn();
 85 |     const useStyles = makeStyles((input: string) => {
 86 |       styleCallback(input);
 87 |       const iconSize = input === 'small' ? 16 : 24;
 88 |       return {
 89 |         size: input,
 90 |         icon: {
 91 |           width: iconSize,
 92 |           height: iconSize,
 93 |         },
 94 |         other: {
 95 |           paddingTop: 24,
 96 |         },
 97 |       };
 98 |     });
 99 |     // styles should be lazily created
100 |     expect(styleCallback).not.toHaveBeenCalled();
101 |     expect(styleSheetCreate).not.toHaveBeenCalled();
102 | 
103 |     const { result, rerender } = renderHook((props) => useStyles(props), {
104 |       initialProps: 'small',
105 |     });
106 |     const smallResult = result.current;
107 |     expect(styleCallback).lastCalledWith('small');
108 |     expect(styleCallback).toBeCalledTimes(1);
109 | 
110 |     rerender('medium');
111 |     const mediumResult = result.current;
112 |     expect(styleCallback).lastCalledWith('medium');
113 |     expect(styleCallback).toBeCalledTimes(2);
114 | 
115 |     // should use memoized result
116 |     rerender('small');
117 |     expect(result.current).toBe(smallResult);
118 |     expect(styleCallback).lastCalledWith('medium');
119 |     expect(styleCallback).toBeCalledTimes(2);
120 | 
121 |     // should create new styles
122 |     rerender('large');
123 |     const largeResult = result.current;
124 |     expect(largeResult).not.toEqual(smallResult);
125 |     expect(largeResult).not.toEqual(mediumResult);
126 |     expect(styleCallback).lastCalledWith('large');
127 |     expect(styleCallback).toBeCalledTimes(3);
128 | 
129 |     // should use memoized result
130 |     rerender('medium');
131 |     expect(result.current).toBe(mediumResult);
132 |     rerender('small');
133 |     expect(result.current).toBe(smallResult);
134 |     rerender('large');
135 |     expect(result.current).toBe(largeResult);
136 | 
137 |     // Result should be memoized, so only three StyleSheet.create calls
138 |     expect(styleSheetCreate).toBeCalledTimes(3);
139 |     expect(styleCallback).toBeCalledTimes(3);
140 |   });
141 | 
142 |   it('should support hook and prop', () => {
143 |     const CounterStepContext = React.createContext(1);
144 |     const useStep = jest
145 |       .fn()
146 |       .mockImplementation(() => React.useContext(CounterStepContext));
147 |     const useStyles = makeStyles(useStep, (step, small: boolean) => {
148 |       const iconSize = small ? 16 : 24;
149 |       return {
150 |         step,
151 |         icon: {
152 |           width: iconSize,
153 |           height: iconSize,
154 |         },
155 |       };
156 |     });
157 |     // styles should be lazily created
158 |     expect(styleSheetCreate).not.toHaveBeenCalled();
159 |     expect(useStep).not.toHaveBeenCalled();
160 | 
161 |     const { result, rerender } = renderHook(({ small }) => useStyles(small), {
162 |       initialProps: {
163 |         step: 2,
164 |         small: false,
165 |       },
166 |       wrapper: ({ children, step }) => (
167 |         <CounterStepContext.Provider value={step}>
168 |           {children}
169 |         </CounterStepContext.Provider>
170 |       ),
171 |     });
172 |     expect(result.current).toMatchInlineSnapshot(`
173 |       Object {
174 |         "icon": Object {
175 |           "height": 24,
176 |           "width": 24,
177 |         },
178 |         "step": 2,
179 |       }
180 |     `);
181 |     expect(styleSheetCreate).toBeCalledTimes(1);
182 |     expect(useStep).toBeCalledTimes(1);
183 | 
184 |     rerender({ step: 3, small: true });
185 | 
186 |     expect(result.current).toMatchInlineSnapshot(`
187 |       Object {
188 |         "icon": Object {
189 |           "height": 16,
190 |           "width": 16,
191 |         },
192 |         "step": 3,
193 |       }
194 |     `);
195 |     expect(styleSheetCreate).toBeCalledTimes(2);
196 |     expect(useStep).toBeCalledTimes(2);
197 | 
198 |     rerender({ step: 3, small: false });
199 | 
200 |     expect(result.current).toMatchInlineSnapshot(`
201 |       Object {
202 |         "icon": Object {
203 |           "height": 24,
204 |           "width": 24,
205 |         },
206 |         "step": 3,
207 |       }
208 |     `);
209 |     expect(styleSheetCreate).toBeCalledTimes(3);
210 |     expect(useStep).toBeCalledTimes(3);
211 | 
212 |     rerender({ step: 2, small: false });
213 | 
214 |     // hooks should be called each time it renders
215 |     expect(useStep).toBeCalledTimes(4);
216 |     // should use memoized result
217 |     expect(styleSheetCreate).toBeCalledTimes(3);
218 |   });
219 | 
220 |   it('should support multiple hooks and props', () => {
221 |     const AlphaContext = React.createContext('alpha');
222 |     const BetaContext = React.createContext('beta');
223 |     const useAlpha = () => React.useContext(AlphaContext);
224 |     const useBeta = () => React.useContext(BetaContext);
225 |     const useGamma = () => ({ flex: 1 });
226 |     const useStyles = makeStyles(
227 |       useAlpha,
228 |       useBeta,
229 |       useGamma,
230 |       (alpha, beta, gamma, delta: string, epsilon: boolean, zeta: number) => ({
231 |         alpha,
232 |         beta: {
233 |           color: beta,
234 |         },
235 |         gamma,
236 |         delta: {
237 |           backgroundColor: delta,
238 |         },
239 |         epsilon: {
240 |           textAlign: epsilon ? 'left' : 'right',
241 |         },
242 |         zeta: {
243 |           margin: zeta,
244 |         },
245 |       })
246 |     );
247 |     // styles should be lazily created
248 |     expect(styleSheetCreate).not.toHaveBeenCalled();
249 | 
250 |     const { result, rerender } = renderHook(
251 |       ({ delta, epsilon, zeta }) => useStyles(delta, epsilon, zeta),
252 |       {
253 |         initialProps: {
254 |           alpha: 'a',
255 |           beta: 'red',
256 |           delta: 'yellow',
257 |           epsilon: false,
258 |           zeta: 40,
259 |         },
260 |         wrapper: ({ children, alpha, beta }) => (
261 |           <AlphaContext.Provider value={alpha}>
262 |             <BetaContext.Provider value={beta}>{children}</BetaContext.Provider>
263 |           </AlphaContext.Provider>
264 |         ),
265 |       }
266 |     );
267 |     expect(result.current).toMatchInlineSnapshot(`
268 |       Object {
269 |         "alpha": "a",
270 |         "beta": Object {
271 |           "color": "red",
272 |         },
273 |         "delta": Object {
274 |           "backgroundColor": "yellow",
275 |         },
276 |         "epsilon": Object {
277 |           "textAlign": "right",
278 |         },
279 |         "gamma": Object {
280 |           "flex": 1,
281 |         },
282 |         "zeta": Object {
283 |           "margin": 40,
284 |         },
285 |       }
286 |     `);
287 |     expect(styleSheetCreate).toBeCalledTimes(1);
288 | 
289 |     rerender({
290 |       alpha: 'al',
291 |       beta: 'blue',
292 |       delta: 'transparent',
293 |       epsilon: true,
294 |       zeta: 20,
295 |     });
296 | 
297 |     expect(result.current).toMatchInlineSnapshot(`
298 |       Object {
299 |         "alpha": "al",
300 |         "beta": Object {
301 |           "color": "blue",
302 |         },
303 |         "delta": Object {
304 |           "backgroundColor": "transparent",
305 |         },
306 |         "epsilon": Object {
307 |           "textAlign": "left",
308 |         },
309 |         "gamma": Object {
310 |           "flex": 1,
311 |         },
312 |         "zeta": Object {
313 |           "margin": 20,
314 |         },
315 |       }
316 |     `);
317 |     expect(styleSheetCreate).toBeCalledTimes(2);
318 | 
319 |     // same as initial props
320 |     rerender({
321 |       alpha: 'a',
322 |       beta: 'red',
323 |       delta: 'yellow',
324 |       epsilon: false,
325 |       zeta: 40,
326 |     });
327 | 
328 |     expect(styleSheetCreate).toBeCalledTimes(2);
329 |   });
330 | });
331 | 


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