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November 16, 2024 03:47
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Example of a dropcap in React Native/Expo
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import { useState } from 'react'; | |
import { StyleSheet, Text, View } from 'react-native'; | |
import ParallaxScrollView from '@/components/ParallaxScrollView'; | |
import { ThemedView } from '@/components/ThemedView'; | |
const Paragraph = ({ dropCap = false, dropCapLines = 3, children }) => { | |
const [lines, setLines] = useState<string[]>([]); | |
const [firstLetter, setFirstLetter] = useState<string>(); | |
const [lineHeight, setLineHeight] = useState<number>(16); | |
if (dropCap && lines.length > 0) { | |
const [firstLine, secondLine, thirdLine, ...restLines] = lines; | |
return ( | |
<View style={{ flexDirection: 'column', backgroundColor: 'red' }}> | |
<View style={{ flexDirection: 'row' }}> | |
<Text style={{ | |
lineHeight: lineHeight * dropCapLines, | |
fontSize: 48, | |
alignSelf: 'center', | |
backgroundColor: 'blue', | |
}}>{firstLetter}</Text> | |
<Text style={{ flex: 1 }}>{[firstLine, secondLine, thirdLine].join('')}</Text> | |
</View> | |
<View> | |
<Text>{restLines}</Text> | |
</View> | |
</View> | |
) | |
} | |
if (dropCap) { | |
const [firstLetter, ...text] = children.trim(); | |
return ( | |
<View style={{ flexDirection: 'row', backgroundColor: 'red' }}> | |
<View style={{ flexDirection: 'row' }}> | |
<Text style={{ | |
fontSize: lineHeight * dropCapLines, | |
alignSelf: 'flex-start', | |
backgroundColor: 'blue', | |
}}>{firstLetter}</Text> | |
<Text style={{ flex: 1 }} onTextLayout={(event) => { | |
setFirstLetter(firstLetter); | |
setLineHeight(event.nativeEvent.lines[0].height); | |
setLines(event.nativeEvent.lines.map((line) => line.text)) | |
}}>{text.join('')}</Text> | |
</View> | |
<View> | |
<Text></Text> | |
</View> | |
</View> | |
) | |
}x | |
return (<Text>{children}</Text>) | |
} | |
export default function HomeScreen() { | |
return ( | |
<ParallaxScrollView | |
headerBackgroundColor={{ light: '#A1CEDC', dark: '#1D3D47' }} | |
headerImage={<></>} | |
> | |
<View style={styles.titleContainer}> | |
<Paragraph dropCap={true}>Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor | |
incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco | |
laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit | |
esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui | |
officia deserunt mollit anim id est laborum.</Paragraph> | |
</View> | |
</ParallaxScrollView> | |
); | |
} | |
const styles = StyleSheet.create({ | |
titleContainer: { | |
flexDirection: 'row', | |
alignItems: 'center', | |
gap: 8, | |
}, | |
stepContainer: { | |
gap: 8, | |
marginBottom: 8, | |
}, | |
reactLogo: { | |
height: 178, | |
width: 290, | |
bottom: 0, | |
left: 0, | |
position: 'absolute', | |
}, | |
}); |
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