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Enhance useTheme to provide default theme without ThemeProvider #105

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merged 4 commits into from
Sep 10, 2021
Merged

Enhance useTheme to provide default theme without ThemeProvider #105

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8a7fceb
Make useTheme provide default theme without ThemeProvider
yujonglee Sep 8, 2021
03106a3
Fix build fail
yujonglee Sep 8, 2021
8491695
Enhance useTheme with Context default value
yujonglee Sep 9, 2021
c9f1cc7
Enhance readability of ThemeProvider
yujonglee Sep 9, 2021
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16 changes: 5 additions & 11 deletions main/SwitchToggle.tsx
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Original file line number Diff line number Diff line change
@@ -1,10 +1,8 @@
import {Animated, StyleProp, TouchableOpacity, ViewStyle} from 'react-native';
import {DoobooTheme, light} from './theme';
import React, {ReactElement, useEffect, useState} from 'react';

import {isEmptyObject} from './utils';
import styled from '@emotion/native';
import {withTheme} from '@emotion/react';
import {useTheme} from './theme/ThemeProvider';

interface Styles {
containerStyle?: ViewStyle;
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You may remove prefix Style when it is grouped under Styles.

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Ok. I'll remove it in other PR. (because it is not related to this PR.)

Expand All @@ -21,7 +19,6 @@ interface Styles {
interface Props {
testID?: string;
isOn: boolean;
theme?: DoobooTheme;
style?: StyleProp<ViewStyle>;
styles?: Styles;
duration?: number;
Expand Down Expand Up @@ -50,7 +47,7 @@ const defaultCircleStyle: ViewStyle = {
borderRadius: 16,
};

function Component(props: Props): React.ReactElement {
export function SwitchToggle(props: Props): ReactElement {
const {
testID,
isOn,
Expand All @@ -62,10 +59,9 @@ function Component(props: Props): React.ReactElement {
onPress,
} = props;

const theme =
!props.theme || isEmptyObject(props.theme) ? light : props.theme;

const {primary, disabled, textContrast, placeholder} = theme;
const {
theme: {primary, disabled, textContrast, placeholder},
} = useTheme();

const {
backgroundColorOn = primary,
Expand Down Expand Up @@ -195,5 +191,3 @@ function Component(props: Props): React.ReactElement {
</TouchableOpacity>
);
}

export const SwitchToggle = withTheme(Component);
12 changes: 11 additions & 1 deletion main/theme/ThemeProvider.tsx
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ import {
import React, {useEffect, useState} from 'react';

import {ColorSchemeName} from 'react-native';
import {DoobooTheme} from '.';
import createCtx from './createCtx';
import useColorScheme from './useColorScheme';
import {useMediaQuery} from 'react-responsive';
Expand Down Expand Up @@ -89,4 +90,13 @@ function ThemeProvider({
);
}

export {useCtx as useTheme, ThemeProvider, withTheme};
const useTheme = (): Context | {theme: DoobooTheme} => {
const currentTheme = useCtx();
const defaultTheme = light;

if (!currentTheme) return {theme: defaultTheme}!;

return currentTheme;
};

export {useTheme, ThemeProvider, withTheme};
10 changes: 2 additions & 8 deletions main/theme/createCtx.tsx
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Original file line number Diff line number Diff line change
@@ -1,7 +1,7 @@
import React from 'react';

type CreateCtx<A> = readonly [
() => A,
() => A | undefined,
React.ProviderExoticComponent<React.ProviderProps<A | undefined>>,
];

Expand All @@ -10,13 +10,7 @@ type CreateCtx<A> = readonly [
function createCtx<A>(): CreateCtx<A> {
const ctx = React.createContext<A | undefined>(undefined);

function useCtx(): A {
const c = React.useContext(ctx);

if (!c) throw new Error('useCtx must be inside a Provider with a value');

return c;
}
const useCtx = (): A | undefined => React.useContext(ctx);

// make TypeScript infer a tuple, not an array of union types
return [useCtx, ctx.Provider] as const;
Expand Down