91 lines
2.5 KiB
JavaScript
91 lines
2.5 KiB
JavaScript
/**
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* Copyright (c) 2015-present, Facebook, Inc.
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*
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* This source code is licensed under the MIT license found in the
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* LICENSE file in the root directory of this source tree.
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*
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* @providesModule ImageBackground
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* @flow
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* @format
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*/
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'use strict';
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const Image = require('Image');
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const React = require('React');
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const StyleSheet = require('StyleSheet');
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const View = require('View');
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const ensureComponentIsNative = require('ensureComponentIsNative');
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/**
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* Very simple drop-in replacement for <Image> which supports nesting views.
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*
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* ```ReactNativeWebPlayer
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* import React, { Component } from 'react';
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* import { AppRegistry, View, ImageBackground, Text } from 'react-native';
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*
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* class DisplayAnImageBackground extends Component {
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* render() {
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* return (
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* <ImageBackground
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* style={{width: 50, height: 50}}
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* source={{uri: 'https://facebook.github.io/react-native/img/opengraph.png'}}
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* >
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* <Text>React</Text>
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* </ImageBackground>
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* );
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* }
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* }
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*
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* // App registration and rendering
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* AppRegistry.registerComponent('DisplayAnImageBackground', () => DisplayAnImageBackground);
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* ```
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*/
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class ImageBackground extends React.Component<$FlowFixMeProps> {
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setNativeProps(props: Object) {
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// Work-around flow
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const viewRef = this._viewRef;
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if (viewRef) {
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ensureComponentIsNative(viewRef);
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viewRef.setNativeProps(props);
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}
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}
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_viewRef: ?React.ElementRef<typeof View> = null;
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_captureRef = ref => {
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this._viewRef = ref;
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};
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render() {
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const {children, style, imageStyle, imageRef, ...props} = this.props;
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return (
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<View style={style} ref={this._captureRef}>
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<Image
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{...props}
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style={[
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StyleSheet.absoluteFill,
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{
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// Temporary Workaround:
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// Current (imperfect yet) implementation of <Image> overwrites width and height styles
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// (which is not quite correct), and these styles conflict with explicitly set styles
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// of <ImageBackground> and with our internal layout model here.
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// So, we have to proxy/reapply these styles explicitly for actual <Image> component.
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// This workaround should be removed after implementing proper support of
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// intrinsic content size of the <Image>.
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width: style.width,
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height: style.height,
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},
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imageStyle,
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]}
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ref={imageRef}
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/>
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{children}
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</View>
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);
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}
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}
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module.exports = ImageBackground;
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