react-native/RNTester/js/RTLExample.js

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @flow
* @format
* @providesModule RTLExample
*/
'use strict';
const React = require('react');
const ReactNative = require('react-native');
const {
Alert,
Animated,
I18nManager,
Image,
PanResponder,
PixelRatio,
ScrollView,
StyleSheet,
Text,
TouchableWithoutFeedback,
Switch,
View,
Button,
} = ReactNative;
const Platform = require('Platform');
const RNTesterPage = require('./RNTesterPage');
const RNTesterBlock = require('./RNTesterBlock');
type State = {
toggleStatus: any,
pan: Object,
linear: Object,
isRTL: boolean,
windowWidth: number,
};
const SCALE = PixelRatio.get();
const IMAGE_DIMENSION = 100 * SCALE;
const IMAGE_SIZE = [IMAGE_DIMENSION, IMAGE_DIMENSION];
const IS_RTL = I18nManager.isRTL;
function ListItem(props) {
return (
<View style={styles.row}>
<View style={styles.column1}>
<Image source={props.imageSource} style={styles.icon} />
</View>
<View style={styles.column2}>
<View style={styles.textBox}>
<Text>Text Text Text</Text>
</View>
</View>
<View style={styles.column3}>
<View style={styles.smallButton}>
<Text style={styles.fontSizeSmall}>Button</Text>
</View>
</View>
</View>
);
}
function TextAlignmentExample(props) {
return (
<RNTesterBlock title={props.title} description={props.description}>
<View>
<Text style={props.style}>
Left-to-Right language without text alignment.
</Text>
<Text style={props.style}>
{'\u0645\u0646 \u0627\u0644\u064A\u0645\u064A\u0646 ' +
'\u0625\u0644\u0649 \u0627\u0644\u064A\u0633\u0627\u0631 ' +
'\u0627\u0644\u0644\u063A\u0629 \u062F\u0648\u0646 ' +
'\u0645\u062D\u0627\u0630\u0627\u0629 \u0627\u0644\u0646\u0635'}
</Text>
<Text style={props.style}>
{'\u05DE\u05D9\u05DE\u05D9\u05DF \u05DC\u05E9\u05DE\u05D0\u05DC ' +
'\u05D4\u05E9\u05E4\u05D4 \u05D1\u05DC\u05D9 ' +
'\u05D9\u05D9\u05E9\u05D5\u05E8 \u05D8\u05E7\u05E1\u05D8'}
</Text>
</View>
</RNTesterBlock>
);
}
function AnimationBlock(props) {
return (
<View style={styles.block}>
<TouchableWithoutFeedback onPress={props.onPress}>
<Animated.Image
style={[styles.img, props.imgStyle]}
source={require('./Thumbnails/poke.png')}
/>
</TouchableWithoutFeedback>
</View>
);
}
type RTLSwitcherComponentState = {|
isRTL: boolean,
|};
function withRTLState(Component) {
return class extends React.Component<*, RTLSwitcherComponentState> {
constructor(...args) {
super(...args);
this.state = {
isRTL: IS_RTL,
};
}
render() {
const setRTL = isRTL => this.setState({isRTL: isRTL});
return <Component isRTL={this.state.isRTL} setRTL={setRTL} />;
}
};
}
const RTLToggler = ({isRTL, setRTL}) => {
if (Platform.OS === 'android') {
return <Text style={styles.rtlToggler}>{isRTL ? 'RTL' : 'LTR'}</Text>;
}
const toggleRTL = () => setRTL(!isRTL);
return (
<Button
onPress={toggleRTL}
title={isRTL ? 'RTL' : 'LTR'}
color="gray"
accessibilityLabel="Change layout direction"
/>
);
};
const PaddingExample = withRTLState(({isRTL, setRTL}) => {
const color = 'teal';
return (
<RNTesterBlock title={'Padding Start/End'}>
<Text style={styles.bold}>Styles</Text>
<Text>paddingStart: 50,</Text>
<Text>paddingEnd: 10</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<Text>The {color} is padding.</Text>
<View
style={{
backgroundColor: color,
paddingStart: 50,
paddingEnd: 10,
borderWidth: 1,
borderColor: color,
direction: isRTL ? 'rtl' : 'ltr',
}}>
<View
style={{
backgroundColor: 'white',
paddingTop: 5,
paddingBottom: 5,
borderLeftWidth: 1,
borderRightWidth: 1,
borderColor: 'gray',
}}>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
</RNTesterBlock>
);
});
const MarginExample = withRTLState(({isRTL, setRTL}) => {
return (
<RNTesterBlock title={'Margin Start/End'}>
<Text style={styles.bold}>Styles</Text>
<Text>marginStart: 50,</Text>
<Text>marginEnd: 10</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<Text>The green is margin.</Text>
<View
style={{
backgroundColor: 'green',
borderWidth: 1,
borderColor: 'green',
direction: isRTL ? 'rtl' : 'ltr',
}}>
<View
style={{
backgroundColor: 'white',
paddingTop: 5,
paddingBottom: 5,
marginStart: 50,
marginEnd: 10,
borderLeftWidth: 1,
borderRightWidth: 1,
borderColor: 'gray',
}}>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
</RNTesterBlock>
);
});
const PositionExample = withRTLState(({isRTL, setRTL}) => {
return (
<RNTesterBlock title={'Position Start/End'}>
<Text style={styles.bold}>Styles</Text>
<Text>start: 50</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<Text>The orange is position.</Text>
<View
style={{
backgroundColor: 'orange',
borderWidth: 1,
borderColor: 'orange',
direction: isRTL ? 'rtl' : 'ltr',
}}>
<View
style={{
backgroundColor: 'white',
start: 50,
borderColor: 'gray',
}}>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
<Text />
<Text style={styles.bold}>Styles</Text>
<Text>end: 50</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<Text>The orange is position.</Text>
<View
style={{
backgroundColor: 'orange',
borderWidth: 1,
borderColor: 'orange',
direction: isRTL ? 'rtl' : 'ltr',
}}>
<View
style={{
backgroundColor: 'white',
end: 50,
borderColor: 'gray',
}}>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
</RNTesterBlock>
);
});
const BorderWidthExample = withRTLState(({isRTL, setRTL}) => {
return (
<RNTesterBlock title={'Border Width Start/End'}>
<Text style={styles.bold}>Styles</Text>
<Text>borderStartWidth: 10,</Text>
<Text>borderEndWidth: 50</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<View style={{direction: isRTL ? 'rtl' : 'ltr'}}>
<View
style={{
borderStartWidth: 10,
borderEndWidth: 50,
}}>
<View>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
</View>
</RNTesterBlock>
);
});
const BorderColorExample = withRTLState(({isRTL, setRTL}) => {
return (
<RNTesterBlock title={'Border Color Start/End'}>
<Text style={styles.bold}>Styles</Text>
<Text>borderStartColor: 'red',</Text>
<Text>borderEndColor: 'green',</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<View style={{direction: isRTL ? 'rtl' : 'ltr'}}>
<View
style={{
borderStartColor: 'red',
borderEndColor: 'green',
borderLeftWidth: 20,
borderRightWidth: 20,
padding: 10,
}}>
<View>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
</View>
</RNTesterBlock>
);
});
const BorderRadiiExample = withRTLState(({isRTL, setRTL}) => {
return (
<RNTesterBlock title={'Border Radii Start/End'}>
<Text style={styles.bold}>Styles</Text>
<Text>borderTopStartRadius: 10,</Text>
<Text>borderTopEndRadius: 20,</Text>
<Text>borderBottomStartRadius: 30,</Text>
<Text>borderBottomEndRadius: 40</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<View style={{direction: isRTL ? 'rtl' : 'ltr'}}>
<View
style={{
borderWidth: 10,
borderTopStartRadius: 10,
borderTopEndRadius: 20,
borderBottomStartRadius: 30,
borderBottomEndRadius: 40,
padding: 10,
}}>
<View>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
</View>
</RNTesterBlock>
);
});
const BorderExample = withRTLState(({isRTL, setRTL}) => {
return (
<RNTesterBlock title={'Border '}>
<Text style={styles.bold}>Styles</Text>
<Text>borderStartColor: 'red',</Text>
<Text>borderEndColor: 'green',</Text>
<Text>borderStartWidth: 10,</Text>
<Text>borderEndWidth: 50,</Text>
<Text>borderTopStartRadius: 10,</Text>
<Text>borderTopEndRadius: 20,</Text>
<Text>borderBottomStartRadius: 30,</Text>
<Text>borderBottomEndRadius: 40</Text>
<Text />
<Text style={styles.bold}>Demo: </Text>
<View style={{direction: isRTL ? 'rtl' : 'ltr'}}>
<View
style={{
borderStartColor: 'red',
borderEndColor: 'green',
borderStartWidth: 10,
borderEndWidth: 50,
borderTopStartRadius: 10,
borderTopEndRadius: 20,
borderBottomStartRadius: 30,
borderBottomEndRadius: 40,
padding: 10,
}}>
<View>
<RTLToggler setRTL={setRTL} isRTL={isRTL} />
</View>
</View>
</View>
</RNTesterBlock>
);
});
class RTLExample extends React.Component<any, State> {
static title = 'RTLExample';
static description = 'Examples to show how to apply components to RTL layout.';
_panResponder: Object;
constructor(props: Object) {
super(props);
const pan = new Animated.ValueXY();
this._panResponder = PanResponder.create({
onStartShouldSetPanResponder: () => true,
onPanResponderGrant: this._onPanResponderGrant,
onPanResponderMove: Animated.event([null, {dx: pan.x, dy: pan.y}]),
onPanResponderRelease: this._onPanResponderEnd,
onPanResponderTerminate: this._onPanResponderEnd,
});
this.state = {
toggleStatus: {},
pan,
linear: new Animated.Value(0),
isRTL: IS_RTL,
windowWidth: 0,
};
}
render() {
return (
<ScrollView
style={[
styles.container,
// `direction` property is supported only on iOS now.
Platform.OS === 'ios'
? {direction: this.state.isRTL ? 'rtl' : 'ltr'}
: null,
]}
onLayout={this._onLayout}>
<RNTesterPage title={'Right-to-Left (RTL) UI Layout'}>
<RNTesterBlock title={'Current Layout Direction'}>
<View style={styles.directionBox}>
<Text style={styles.directionText}>
{this.state.isRTL ? 'Right-to-Left' : 'Left-to-Right'}
</Text>
</View>
</RNTesterBlock>
<RNTesterBlock title={'Quickly Test RTL Layout'}>
<View style={styles.flexDirectionRow}>
<Text style={styles.switchRowTextView}>forceRTL</Text>
<View style={styles.switchRowSwitchView}>
<Switch
onValueChange={this._onDirectionChange}
style={styles.rightAlignStyle}
value={this.state.isRTL}
/>
</View>
</View>
</RNTesterBlock>
<RNTesterBlock title={'A Simple List Item Layout'}>
<View style={styles.list}>
<ListItem imageSource={require('./Thumbnails/like.png')} />
<ListItem imageSource={require('./Thumbnails/poke.png')} />
</View>
</RNTesterBlock>
<TextAlignmentExample
title={'Default Text Alignment'}
description={
'In iOS, it depends on active language. ' +
'In Android, it depends on the text content.'
}
style={styles.fontSizeSmall}
/>
<TextAlignmentExample
title={"Using textAlign: 'left'"}
description={
'In iOS/Android, text alignment flips regardless of ' +
'languages or text content.'
}
style={[styles.fontSizeSmall, styles.textAlignLeft]}
/>
<TextAlignmentExample
title={"Using textAlign: 'right'"}
description={
'In iOS/Android, text alignment flips regardless of ' +
'languages or text content.'
}
style={[styles.fontSizeSmall, styles.textAlignRight]}
/>
<RNTesterBlock title={'Working With Icons'}>
<View style={styles.flexDirectionRow}>
<View>
<Image
source={require('./Thumbnails/like.png')}
style={styles.image}
/>
<Text style={styles.fontSizeExtraSmall}>
Without directional meaning
</Text>
</View>
<View style={styles.rightAlignStyle}>
<Image
source={require('./Thumbnails/poke.png')}
style={[styles.image, styles.withRTLStyle]}
/>
<Text style={styles.fontSizeExtraSmall}>
With directional meaning
</Text>
</View>
</View>
</RNTesterBlock>
<RNTesterBlock
title={'Controlling Animation'}
description={'Animation direction according to layout'}>
<View Style={styles.view}>
<AnimationBlock
onPress={this._linearTap}
imgStyle={{
transform: [
{translateX: this.state.linear},
{scaleX: IS_RTL ? -1 : 1},
],
}}
/>
</View>
</RNTesterBlock>
<PaddingExample />
<MarginExample />
<PositionExample />
<BorderWidthExample />
<BorderColorExample />
<BorderRadiiExample />
<BorderExample />
</RNTesterPage>
</ScrollView>
);
}
_onLayout = (e: Object) => {
this.setState({
windowWidth: e.nativeEvent.layout.width,
});
};
_onDirectionChange = () => {
I18nManager.forceRTL(!this.state.isRTL);
this.setState({isRTL: !this.state.isRTL});
Alert.alert(
'Reload this page',
'Please reload this page to change the UI direction! ' +
'All examples in this app will be affected. ' +
'Check them out to see what they look like in RTL layout.',
);
};
_linearTap = (refName: string, e: Object) => {
this.setState({
toggleStatus: {
...this.state.toggleStatus,
[refName]: !this.state.toggleStatus[refName],
},
});
const offset = IMAGE_SIZE[0] / SCALE / 2 + 10;
const toMaxDistance =
(IS_RTL ? -1 : 1) * (this.state.windowWidth / 2 - offset);
Animated.timing(this.state.linear, {
toValue: this.state.toggleStatus[refName] ? toMaxDistance : 0,
duration: 2000,
useNativeDriver: true,
}).start();
};
_onPanResponderGrant = (e: Object, gestureState: Object) => {
this.state.pan.stopAnimation(value => {
this.state.pan.setOffset(value);
});
};
_onPanResponderEnd = (e: Object, gestureState: Object) => {
this.state.pan.flattenOffset();
Animated.sequence([
Animated.decay(this.state.pan, {
velocity: {x: gestureState.vx, y: gestureState.vy},
deceleration: 0.995,
}),
Animated.spring(this.state.pan, {toValue: {x: 0, y: 0}}),
]).start();
};
}
const styles = StyleSheet.create({
container: {
backgroundColor: '#e9eaed',
paddingTop: 15,
},
directionBox: {
flex: 1,
backgroundColor: '#f8f8f8',
borderWidth: 0.5,
borderColor: 'black',
},
directionText: {
padding: 10,
fontSize: 16,
textAlign: 'center',
fontWeight: 'bold',
},
switchRowTextView: {
flex: 1,
marginBottom: 5,
marginTop: 5,
textAlign: 'center',
},
switchRowSwitchView: {
flex: 3,
},
rightAlignStyle: {
right: 10,
position: 'absolute',
},
list: {
height: 120,
marginBottom: 5,
borderTopWidth: 0.5,
borderLeftWidth: 0.5,
borderRightWidth: 0.5,
borderColor: '#e5e5e5',
},
row: {
height: 60,
flexDirection: 'row',
borderBottomWidth: 0.5,
borderColor: '#e5e5e5',
},
column1: {
width: 60,
},
column2: {
flex: 2.5,
padding: 6,
},
column3: {
flex: 1.5,
},
icon: {
width: 48,
height: 48,
margin: 6,
borderWidth: 0.5,
borderColor: '#e5e5e5',
},
withRTLStyle: {
transform: [{scaleX: IS_RTL ? -1 : 1}],
},
image: {
left: 30,
width: 48,
height: 48,
},
img: {
width: IMAGE_SIZE[0] / SCALE,
height: IMAGE_SIZE[1] / SCALE,
},
view: {
flex: 1,
},
block: {
padding: 10,
alignItems: 'center',
},
smallButton: {
top: 18,
borderRadius: 5,
height: 24,
width: 64,
backgroundColor: '#e5e5e5',
justifyContent: 'center',
alignItems: 'center',
},
fontSizeSmall: {
fontSize: 10,
},
fontSizeExtraSmall: {
fontSize: 8,
},
textAlignLeft: {
textAlign: 'left',
},
textAlignRight: {
textAlign: 'right',
},
textBox: {
width: 28,
},
flexDirectionRow: {
flexDirection: 'row',
},
bold: {
fontWeight: 'bold',
},
rtlToggler: {
color: 'gray',
padding: 8,
textAlign: 'center',
fontWeight: '500',
},
});
module.exports = RTLExample;