385 lines
13 KiB
JavaScript
385 lines
13 KiB
JavaScript
/**
|
|
* 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.
|
|
*
|
|
* @providesModule Image
|
|
* @flow
|
|
*/
|
|
'use strict';
|
|
|
|
const EdgeInsetsPropType = require('EdgeInsetsPropType');
|
|
const ImageResizeMode = require('ImageResizeMode');
|
|
const ImageSourcePropType = require('ImageSourcePropType');
|
|
const ImageStylePropTypes = require('ImageStylePropTypes');
|
|
const NativeMethodsMixin = require('NativeMethodsMixin');
|
|
const NativeModules = require('NativeModules');
|
|
const React = require('React');
|
|
const ReactNativeViewAttributes = require('ReactNativeViewAttributes');
|
|
const StyleSheet = require('StyleSheet');
|
|
const StyleSheetPropType = require('StyleSheetPropType');
|
|
|
|
const flattenStyle = require('flattenStyle');
|
|
const requireNativeComponent = require('requireNativeComponent');
|
|
const resolveAssetSource = require('resolveAssetSource');
|
|
|
|
const PropTypes = React.PropTypes;
|
|
|
|
const ImageViewManager = NativeModules.ImageViewManager;
|
|
|
|
/**
|
|
* A React component for displaying different types of images,
|
|
* including network images, static resources, temporary local images, and
|
|
* images from local disk, such as the camera roll.
|
|
*
|
|
* This example shows both fetching and displaying an image from local storage as well as on from
|
|
* network.
|
|
*
|
|
* ```ReactNativeWebPlayer
|
|
* import React, { Component } from 'react';
|
|
* import { AppRegistry, View, Image } from 'react-native';
|
|
*
|
|
* class DisplayAnImage extends Component {
|
|
* render() {
|
|
* return (
|
|
* <View>
|
|
* <Image
|
|
* source={require('./img/favicon.png')}
|
|
* />
|
|
* <Image
|
|
* style={{width: 50, height: 50}}
|
|
* source={{uri: 'https://facebook.github.io/react/img/logo_og.png'}}
|
|
* />
|
|
* </View>
|
|
* );
|
|
* }
|
|
* }
|
|
*
|
|
* // App registration and rendering
|
|
* AppRegistry.registerComponent('DisplayAnImage', () => DisplayAnImage);
|
|
* ```
|
|
*
|
|
* You can also add `style` to an image:
|
|
*
|
|
* ```ReactNativeWebPlayer
|
|
* import React, { Component } from 'react';
|
|
* import { AppRegistry, View, Image, StyleSheet} from 'react-native';
|
|
*
|
|
* const styles = StyleSheet.create({
|
|
* stretch: {
|
|
* width: 50,
|
|
* height: 200
|
|
* }
|
|
* });
|
|
*
|
|
* class DisplayAnImageWithStyle extends Component {
|
|
* render() {
|
|
* return (
|
|
* <View>
|
|
* <Image
|
|
* style={styles.stretch}
|
|
* source={require('./img/favicon.png')}
|
|
* />
|
|
* </View>
|
|
* );
|
|
* }
|
|
* }
|
|
*
|
|
* // App registration and rendering
|
|
* AppRegistry.registerComponent(
|
|
* 'DisplayAnImageWithStyle',
|
|
* () => DisplayAnImageWithStyle
|
|
* );
|
|
* ```
|
|
*
|
|
* ### GIF and WebP support on Android
|
|
*
|
|
* By default, GIF and WebP are not supported on Android.
|
|
*
|
|
* You will need to add some optional modules in `android/app/build.gradle`, depending on the needs of your app.
|
|
*
|
|
* ```
|
|
* dependencies {
|
|
* // If your app supports Android versions before Ice Cream Sandwich (API level 14)
|
|
* compile 'com.facebook.fresco:animated-base-support:0.11.0'
|
|
*
|
|
* // For animated GIF support
|
|
* compile 'com.facebook.fresco:animated-gif:0.11.0'
|
|
*
|
|
* // For WebP support, including animated WebP
|
|
* compile 'com.facebook.fresco:animated-webp:0.11.0'
|
|
* compile 'com.facebook.fresco:webpsupport:0.11.0'
|
|
*
|
|
* // For WebP support, without animations
|
|
* compile 'com.facebook.fresco:webpsupport:0.11.0'
|
|
* }
|
|
* ```
|
|
*
|
|
* Also, if you use GIF with ProGuard, you will need to add this rule in `proguard-rules.pro` :
|
|
* ```
|
|
* -keep class com.facebook.imagepipeline.animated.factory.AnimatedFactoryImpl {
|
|
* public AnimatedFactoryImpl(com.facebook.imagepipeline.bitmaps.PlatformBitmapFactory, com.facebook.imagepipeline.core.ExecutorSupplier);
|
|
* }
|
|
* ```
|
|
*
|
|
*/
|
|
const Image = React.createClass({
|
|
propTypes: {
|
|
/**
|
|
* > `ImageResizeMode` is an `Enum` for different image resizing modes, set via the
|
|
* > `resizeMode` style property on `Image` components. The values are `contain`, `cover`,
|
|
* > `stretch`, `center`, `repeat`.
|
|
*/
|
|
style: StyleSheetPropType(ImageStylePropTypes),
|
|
/**
|
|
* The image source (either a remote URL or a local file resource).
|
|
*
|
|
* This prop can also contain several remote URLs, specified together with
|
|
* their width and height and potentially with scale/other URI arguments.
|
|
* The native side will then choose the best `uri` to display based on the
|
|
* measured size of the image container.
|
|
*/
|
|
source: ImageSourcePropType,
|
|
/**
|
|
* A static image to display while loading the image source.
|
|
*
|
|
* - `uri` - a string representing the resource identifier for the image, which
|
|
* should be either a local file path or the name of a static image resource
|
|
* (which should be wrapped in the `require('./path/to/image.png')` function).
|
|
* - `width`, `height` - can be specified if known at build time, in which case
|
|
* these will be used to set the default `<Image/>` component dimensions.
|
|
* - `scale` - used to indicate the scale factor of the image. Defaults to 1.0 if
|
|
* unspecified, meaning that one image pixel equates to one display point / DIP.
|
|
* - `number` - Opaque type returned by something like `require('./image.jpg')`.
|
|
*
|
|
* @platform ios
|
|
*/
|
|
defaultSource: PropTypes.oneOfType([
|
|
// TODO: Tooling to support documenting these directly and having them display in the docs.
|
|
PropTypes.shape({
|
|
uri: PropTypes.string,
|
|
width: PropTypes.number,
|
|
height: PropTypes.number,
|
|
scale: PropTypes.number,
|
|
}),
|
|
PropTypes.number,
|
|
]),
|
|
/**
|
|
* When true, indicates the image is an accessibility element.
|
|
* @platform ios
|
|
*/
|
|
accessible: PropTypes.bool,
|
|
/**
|
|
* The text that's read by the screen reader when the user interacts with
|
|
* the image.
|
|
* @platform ios
|
|
*/
|
|
accessibilityLabel: PropTypes.string,
|
|
/**
|
|
* blurRadius: the blur radius of the blur filter added to the image
|
|
* @platform ios
|
|
*/
|
|
blurRadius: PropTypes.number,
|
|
/**
|
|
* When the image is resized, the corners of the size specified
|
|
* by `capInsets` will stay a fixed size, but the center content and borders
|
|
* of the image will be stretched. This is useful for creating resizable
|
|
* rounded buttons, shadows, and other resizable assets. More info in the
|
|
* [official Apple documentation](https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIImage_Class/index.html#//apple_ref/occ/instm/UIImage/resizableImageWithCapInsets).
|
|
*
|
|
* @platform ios
|
|
*/
|
|
capInsets: EdgeInsetsPropType,
|
|
/**
|
|
* The mechanism that should be used to resize the image when the image's dimensions
|
|
* differ from the image view's dimensions. Defaults to `auto`.
|
|
*
|
|
* - `auto`: Use heuristics to pick between `resize` and `scale`.
|
|
*
|
|
* - `resize`: A software operation which changes the encoded image in memory before it
|
|
* gets decoded. This should be used instead of `scale` when the image is much larger
|
|
* than the view.
|
|
*
|
|
* - `scale`: The image gets drawn downscaled or upscaled. Compared to `resize`, `scale` is
|
|
* faster (usually hardware accelerated) and produces higher quality images. This
|
|
* should be used if the image is smaller than the view. It should also be used if the
|
|
* image is slightly bigger than the view.
|
|
*
|
|
* More details about `resize` and `scale` can be found at http://frescolib.org/docs/resizing-rotating.html.
|
|
*
|
|
* @platform android
|
|
*/
|
|
resizeMethod: PropTypes.oneOf(['auto', 'resize', 'scale']),
|
|
/**
|
|
* Determines how to resize the image when the frame doesn't match the raw
|
|
* image dimensions.
|
|
*
|
|
* - `cover`: Scale the image uniformly (maintain the image's aspect ratio)
|
|
* so that both dimensions (width and height) of the image will be equal
|
|
* to or larger than the corresponding dimension of the view (minus padding).
|
|
*
|
|
* - `contain`: Scale the image uniformly (maintain the image's aspect ratio)
|
|
* so that both dimensions (width and height) of the image will be equal to
|
|
* or less than the corresponding dimension of the view (minus padding).
|
|
*
|
|
* - `stretch`: Scale width and height independently, This may change the
|
|
* aspect ratio of the src.
|
|
*
|
|
* - `repeat`: Repeat the image to cover the frame of the view. The
|
|
* image will keep it's size and aspect ratio. (iOS only)
|
|
*/
|
|
resizeMode: PropTypes.oneOf(['cover', 'contain', 'stretch', 'repeat', 'center']),
|
|
/**
|
|
* A unique identifier for this element to be used in UI Automation
|
|
* testing scripts.
|
|
*/
|
|
testID: PropTypes.string,
|
|
/**
|
|
* Invoked on mount and layout changes with
|
|
* `{nativeEvent: {layout: {x, y, width, height}}}`.
|
|
*/
|
|
onLayout: PropTypes.func,
|
|
/**
|
|
* Invoked on load start.
|
|
*
|
|
* e.g., `onLoadStart={(e) => this.setState({loading: true})}`
|
|
*/
|
|
onLoadStart: PropTypes.func,
|
|
/**
|
|
* Invoked on download progress with `{nativeEvent: {loaded, total}}`.
|
|
* @platform ios
|
|
*/
|
|
onProgress: PropTypes.func,
|
|
/**
|
|
* Invoked on load error with `{nativeEvent: {error}}`.
|
|
*/
|
|
onError: PropTypes.func,
|
|
/**
|
|
* Invoked when a partial load of the image is complete. The definition of
|
|
* what constitutes a "partial load" is loader specific though this is meant
|
|
* for progressive JPEG loads.
|
|
* @platform ios
|
|
*/
|
|
onPartialLoad: PropTypes.func,
|
|
/**
|
|
* Invoked when load completes successfully.
|
|
*/
|
|
onLoad: PropTypes.func,
|
|
/**
|
|
* Invoked when load either succeeds or fails.
|
|
*/
|
|
onLoadEnd: PropTypes.func,
|
|
},
|
|
|
|
statics: {
|
|
resizeMode: ImageResizeMode,
|
|
/**
|
|
* Retrieve the width and height (in pixels) of an image prior to displaying it.
|
|
* This method can fail if the image cannot be found, or fails to download.
|
|
*
|
|
* In order to retrieve the image dimensions, the image may first need to be
|
|
* loaded or downloaded, after which it will be cached. This means that in
|
|
* principle you could use this method to preload images, however it is not
|
|
* optimized for that purpose, and may in future be implemented in a way that
|
|
* does not fully load/download the image data. A proper, supported way to
|
|
* preload images will be provided as a separate API.
|
|
*
|
|
* @param uri The location of the image.
|
|
* @param success The function that will be called if the image was sucessfully found and width
|
|
* and height retrieved.
|
|
* @param failure The function that will be called if there was an error, such as failing to
|
|
* to retrieve the image.
|
|
*
|
|
* @returns void
|
|
*
|
|
* @platform ios
|
|
*/
|
|
getSize: function(
|
|
uri: string,
|
|
success: (width: number, height: number) => void,
|
|
failure: (error: any) => void,
|
|
) {
|
|
ImageViewManager.getSize(uri, success, failure || function() {
|
|
console.warn('Failed to get size for image: ' + uri);
|
|
});
|
|
},
|
|
/**
|
|
* Prefetches a remote image for later use by downloading it to the disk
|
|
* cache
|
|
*
|
|
* @param url The remote location of the image.
|
|
*
|
|
* @return The prefetched image.
|
|
*/
|
|
prefetch(url: string) {
|
|
return ImageViewManager.prefetchImage(url);
|
|
},
|
|
/**
|
|
* Resolves an asset reference into an object which has the properties `uri`, `width`,
|
|
* and `height`. The input may either be a number (opaque type returned by
|
|
* require('./foo.png')) or an `ImageSource` like { uri: '<http location || file path>' }
|
|
*/
|
|
resolveAssetSource: resolveAssetSource,
|
|
},
|
|
|
|
mixins: [NativeMethodsMixin],
|
|
|
|
/**
|
|
* `NativeMethodsMixin` will look for this when invoking `setNativeProps`. We
|
|
* make `this` look like an actual native component class.
|
|
*/
|
|
viewConfig: {
|
|
uiViewClassName: 'UIView',
|
|
validAttributes: ReactNativeViewAttributes.UIView
|
|
},
|
|
|
|
render: function() {
|
|
const source = resolveAssetSource(this.props.source) || { uri: undefined, width: undefined, height: undefined };
|
|
|
|
let sources;
|
|
let style;
|
|
if (Array.isArray(source)) {
|
|
style = flattenStyle([styles.base, this.props.style]) || {};
|
|
sources = source;
|
|
} else {
|
|
const {width, height, uri} = source;
|
|
style = flattenStyle([{width, height}, styles.base, this.props.style]) || {};
|
|
sources = [source];
|
|
|
|
if (uri === '') {
|
|
console.warn('source.uri should not be an empty string');
|
|
}
|
|
}
|
|
|
|
const resizeMode = this.props.resizeMode || (style || {}).resizeMode || 'cover'; // Workaround for flow bug t7737108
|
|
const tintColor = (style || {}).tintColor; // Workaround for flow bug t7737108
|
|
|
|
if (this.props.src) {
|
|
console.warn('The <Image> component requires a `source` property rather than `src`.');
|
|
}
|
|
|
|
return (
|
|
<RCTImageView
|
|
{...this.props}
|
|
style={style}
|
|
resizeMode={resizeMode}
|
|
tintColor={tintColor}
|
|
source={sources}
|
|
/>
|
|
);
|
|
},
|
|
});
|
|
|
|
const styles = StyleSheet.create({
|
|
base: {
|
|
overflow: 'hidden',
|
|
},
|
|
});
|
|
|
|
const RCTImageView = requireNativeComponent('RCTImageView', Image);
|
|
|
|
module.exports = Image;
|