Samuel Newman
779 lines
22 KiB
TypeScript
779 lines
22 KiB
TypeScript
/**
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* Copyright (c) JOB TODAY S.A. and its affiliates.
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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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*/
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// Original code copied and simplified from the link below as the codebase is currently not maintained:
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// https://github.com/jobtoday/react-native-image-viewing
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import {useCallback, useEffect, useMemo, useState} from 'react'
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import {PixelRatio, StyleSheet, useWindowDimensions, View} from 'react-native'
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import {SystemBars} from 'react-native-edge-to-edge'
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import {Gesture} from 'react-native-gesture-handler'
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import PagerView from 'react-native-pager-view'
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import Animated, {
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type AnimatableValue,
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type AnimatedRef,
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cancelAnimation,
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interpolate,
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measure,
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type MeasuredDimensions,
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ReduceMotion,
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runOnJS,
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runOnUI,
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type SharedValue,
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useAnimatedReaction,
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useAnimatedRef,
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useAnimatedStyle,
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useDerivedValue,
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useSharedValue,
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withDecay,
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withSpring,
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type WithSpringConfig,
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} from 'react-native-reanimated'
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import {Image} from 'expo-image'
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import * as ScreenOrientation from 'expo-screen-orientation'
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import {type Dimensions} from '#/lib/media/types'
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import {useTheme} from '#/alf'
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import {setSystemUITheme} from '#/alf/util/systemUI'
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import {type Lightbox} from '#/components/Lightbox/state'
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import {IS_IOS} from '#/env'
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import {PlatformInfo} from '../../../../modules/expo-bluesky-swiss-army'
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import {Footer} from '../chrome/Footer'
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import {Header} from '../chrome/Header'
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import {
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type ImageSource,
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type LightboxTransforms,
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type Transform,
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} from '../types'
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import ImageItem from './ImageItem/ImageItem'
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type Rect = {x: number; y: number; width: number; height: number}
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const PORTRAIT_UP = ScreenOrientation.OrientationLock.PORTRAIT_UP
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const PIXEL_RATIO = PixelRatio.get()
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const SLOW_SPRING: WithSpringConfig = {
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mass: IS_IOS ? 1.25 : 0.75,
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damping: 300,
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stiffness: 800,
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restDisplacementThreshold: 0.001,
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}
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const FAST_SPRING: WithSpringConfig = {
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mass: IS_IOS ? 1.25 : 0.75,
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damping: 150,
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stiffness: 900,
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restDisplacementThreshold: 0.001,
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}
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function canAnimate(lightbox: Lightbox): boolean {
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if (PlatformInfo.getIsReducedMotionEnabled()) {
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return false
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}
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const img = lightbox.images[lightbox.index]
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return !!img.thumbRect && !!(img.dimensions || img.thumbDimensions)
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}
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export default function ImageViewRoot({
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lightbox: nextLightbox,
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onRequestClose,
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onPressSave,
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onPressShare,
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}: {
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lightbox: Lightbox | null
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onRequestClose: () => void
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onPressSave: (uri: string) => void
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onPressShare: (uri: string) => void
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}) {
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'use no memo'
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const ref = useAnimatedRef<View>()
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const [activeLightbox, setActiveLightbox] = useState(nextLightbox)
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const [orientation, setOrientation] = useState<'portrait' | 'landscape'>(
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'portrait',
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)
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const openProgress = useSharedValue(0)
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const thumbRects = useSharedValue<Record<number, MeasuredDimensions | null>>(
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{},
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)
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if (!activeLightbox && nextLightbox) {
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setActiveLightbox(nextLightbox)
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}
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useEffect(() => {
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if (!nextLightbox) {
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return
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}
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const initial: Record<number, MeasuredDimensions | null> = {}
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nextLightbox.images.forEach((img, i) => {
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initial[i] = img.thumbRect ?? null
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})
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thumbRects.set(initial)
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const isAnimated = canAnimate(nextLightbox)
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// https://github.com/software-mansion/react-native-reanimated/issues/6677
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rAF_FIXED(() => {
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openProgress.set(() =>
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isAnimated ? withClampedSpring(1, SLOW_SPRING) : 1,
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)
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})
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return () => {
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// https://github.com/software-mansion/react-native-reanimated/issues/6677
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rAF_FIXED(() => {
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openProgress.set(() =>
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isAnimated ? withClampedSpring(0, SLOW_SPRING) : 0,
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)
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})
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}
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}, [nextLightbox, openProgress, thumbRects])
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const onFullyClosed = useCallback(() => {
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setActiveLightbox(null)
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runOnUI(() => {
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'worklet'
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thumbRects.set({})
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})()
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requestIdleCallback(() => {
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void Image.clearMemoryCache()
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})
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}, [thumbRects])
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useAnimatedReaction(
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() => openProgress.get() === 0,
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(isGone, wasGone) => {
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if (isGone && !wasGone) {
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runOnJS(onFullyClosed)()
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}
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},
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)
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// Delay the unlock until after we've finished the scale up animation.
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// It's complicated to do the same for locking it back so we don't attempt that.
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useAnimatedReaction(
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() => openProgress.get() === 1,
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(isOpen, wasOpen) => {
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if (isOpen && !wasOpen) {
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runOnJS(ScreenOrientation.unlockAsync)()
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} else if (!isOpen && wasOpen) {
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// default is PORTRAIT_UP - set via config plugin in app.config.js -sfn
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runOnJS(ScreenOrientation.lockAsync)(PORTRAIT_UP)
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}
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},
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)
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const onFlyAway = useCallback(() => {
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'worklet'
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openProgress.set(0)
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runOnJS(onRequestClose)()
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}, [onRequestClose, openProgress])
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return (
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// Keep it always mounted to avoid flicker on the first frame.
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<View
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style={[styles.screen, !activeLightbox && styles.screenHidden]}
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aria-modal
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accessibilityViewIsModal
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aria-hidden={!activeLightbox}>
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<Animated.View
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ref={ref}
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style={{flex: 1}}
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collapsable={false}
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onLayout={e => {
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const layout = e.nativeEvent.layout
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setOrientation(
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layout.height > layout.width ? 'portrait' : 'landscape',
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)
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}}>
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{activeLightbox && (
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<ImageView
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key={activeLightbox.id + '-' + orientation}
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lightbox={activeLightbox}
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orientation={orientation}
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onRequestClose={onRequestClose}
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onPressSave={onPressSave}
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onPressShare={onPressShare}
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onFlyAway={onFlyAway}
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safeAreaRef={ref}
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openProgress={openProgress}
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thumbRects={thumbRects}
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/>
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)}
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</Animated.View>
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</View>
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)
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}
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function ImageView({
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lightbox,
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orientation,
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onRequestClose,
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onPressSave,
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onPressShare,
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onFlyAway,
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safeAreaRef,
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openProgress,
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thumbRects,
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}: {
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lightbox: Lightbox
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orientation: 'portrait' | 'landscape'
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onRequestClose: () => void
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onPressSave: (uri: string) => void
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onPressShare: (uri: string) => void
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onFlyAway: () => void
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safeAreaRef: AnimatedRef<View>
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openProgress: SharedValue<number>
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thumbRects: SharedValue<Record<number, MeasuredDimensions | null>>
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}) {
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const {images, index: initialImageIndex} = lightbox
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const isAnimated = useMemo(() => canAnimate(lightbox), [lightbox])
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const [isScaled, setIsScaled] = useState(false)
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const [isDragging, setIsDragging] = useState(false)
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const [imageIndex, setImageIndex] = useState(initialImageIndex)
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const [showControls, setShowControls] = useState(true)
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const [isAltExpanded, setIsAltExpanded] = useState(false)
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const dismissSwipeTranslateY = useSharedValue(0)
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const isFlyingAway = useSharedValue(false)
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const containerStyle = useAnimatedStyle(() => {
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if (openProgress.get() < 1) {
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return {
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pointerEvents: 'none',
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opacity: isAnimated ? 1 : 0,
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}
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}
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if (isFlyingAway.get()) {
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return {
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pointerEvents: 'none',
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opacity: 1,
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}
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}
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return {pointerEvents: 'auto', opacity: 1}
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})
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const backdropStyle = useAnimatedStyle(() => {
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const screenSize = measure(safeAreaRef)
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let opacity = 1
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const openProgressValue = openProgress.get()
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if (openProgressValue < 1) {
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opacity = Math.sqrt(openProgressValue)
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} else if (screenSize && orientation === 'portrait') {
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const dragProgress = Math.min(
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Math.abs(dismissSwipeTranslateY.get()) / (screenSize.height / 2),
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1,
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)
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opacity -= dragProgress
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}
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const factor = IS_IOS ? 100 : 50
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return {
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opacity: Math.round(opacity * factor) / factor,
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}
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})
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const animatedHeaderStyle = useAnimatedStyle(() => {
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const show = showControls && dismissSwipeTranslateY.get() === 0
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return {
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pointerEvents: show ? 'box-none' : 'none',
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opacity: withClampedSpring(
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show && openProgress.get() === 1 ? 1 : 0,
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FAST_SPRING,
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),
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transform: [
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{
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translateY: withClampedSpring(show ? 0 : -30, FAST_SPRING),
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},
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],
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}
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})
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const animatedFooterStyle = useAnimatedStyle(() => {
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const show = showControls && dismissSwipeTranslateY.get() === 0
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return {
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flexGrow: 1,
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pointerEvents: show ? 'box-none' : 'none',
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opacity: withClampedSpring(
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show && openProgress.get() === 1 ? 1 : 0,
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FAST_SPRING,
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),
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transform: [
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{
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translateY: withClampedSpring(show ? 0 : 30, FAST_SPRING),
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},
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],
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}
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})
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const handleRequestClose = useCallback(() => {
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const activeRef = images[imageIndex]?.thumbRef
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if (isAnimated && activeRef) {
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runOnUI(() => {
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'worklet'
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const rect = measure(activeRef)
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thumbRects.modify(rects => {
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'worklet'
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rects[imageIndex] = rect
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return rects
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})
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runOnJS(onRequestClose)()
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})()
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} else {
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onRequestClose()
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}
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}, [isAnimated, images, imageIndex, thumbRects, onRequestClose])
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const onTap = useCallback(() => {
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setShowControls(show => !show)
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}, [])
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const onZoom = useCallback((nextIsScaled: boolean) => {
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setIsScaled(nextIsScaled)
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if (nextIsScaled) {
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setShowControls(false)
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}
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}, [])
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useAnimatedReaction(
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() => {
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const screenSize = measure(safeAreaRef)
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return (
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!screenSize ||
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Math.abs(dismissSwipeTranslateY.get()) > screenSize.height
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)
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},
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(isOut, wasOut) => {
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if (isOut && !wasOut) {
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// Stop the animation from blocking the screen forever.
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cancelAnimation(dismissSwipeTranslateY)
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onFlyAway()
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}
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},
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)
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// style system ui on android
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const t = useTheme()
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useEffect(() => {
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setSystemUITheme('lightbox', t)
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return () => {
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setSystemUITheme('theme', t)
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}
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}, [t])
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return (
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<Animated.View style={[styles.container, containerStyle]}>
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<SystemBars
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style={{statusBar: 'light', navigationBar: 'light'}}
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hidden={{
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statusBar: isScaled || !showControls,
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navigationBar: false,
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}}
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/>
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<Animated.View
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style={[styles.backdrop, backdropStyle]}
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renderToHardwareTextureAndroid
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/>
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<PagerView
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scrollEnabled={!isScaled}
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initialPage={initialImageIndex}
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onPageSelected={e => {
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setImageIndex(e.nativeEvent.position)
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setIsScaled(false)
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}}
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onPageScrollStateChanged={e => {
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setIsDragging(e.nativeEvent.pageScrollState !== 'idle')
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}}
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overdrag={true}
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style={styles.pager}>
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{images.map((imageSrc, i) => (
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<View key={`${i}-${imageSrc.uri}`}>
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<LightboxImage
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onTap={onTap}
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onZoom={onZoom}
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imageSrc={imageSrc}
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onRequestClose={handleRequestClose}
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isScrollViewBeingDragged={isDragging}
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showControls={showControls}
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safeAreaRef={safeAreaRef}
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isScaled={isScaled}
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isFlyingAway={isFlyingAway}
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isActive={i === imageIndex}
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dismissSwipeTranslateY={dismissSwipeTranslateY}
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openProgress={openProgress}
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thumbRects={thumbRects}
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imageIndex={i}
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/>
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</View>
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))}
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</PagerView>
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<View style={styles.controls} pointerEvents="box-none">
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<Animated.View
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style={animatedHeaderStyle}
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pointerEvents="box-none"
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renderToHardwareTextureAndroid>
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<Header
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onRequestClose={handleRequestClose}
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onPressShare={() => onPressShare(images[imageIndex].uri)}
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onPressSave={() => onPressSave(images[imageIndex].uri)}
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imageCount={images.length}
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activeIndex={imageIndex}
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/>
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</Animated.View>
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<Animated.View
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style={animatedFooterStyle}
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pointerEvents="box-none"
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renderToHardwareTextureAndroid={!isAltExpanded}>
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<Footer
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altText={images[imageIndex].alt}
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isAltExpanded={isAltExpanded}
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onToggleAltExpanded={() => setIsAltExpanded(e => !e)}
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/>
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</Animated.View>
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</View>
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</Animated.View>
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)
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}
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function LightboxImage({
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imageSrc,
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onTap,
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onZoom,
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onRequestClose,
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isScrollViewBeingDragged,
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isScaled,
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isFlyingAway,
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isActive,
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showControls,
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safeAreaRef,
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openProgress,
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dismissSwipeTranslateY,
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thumbRects,
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imageIndex,
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}: {
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imageSrc: ImageSource
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onRequestClose: () => void
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onTap: () => void
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onZoom: (scaled: boolean) => void
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isScrollViewBeingDragged: boolean
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isScaled: boolean
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isActive: boolean
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isFlyingAway: SharedValue<boolean>
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showControls: boolean
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safeAreaRef: AnimatedRef<View>
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openProgress: SharedValue<number>
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dismissSwipeTranslateY: SharedValue<number>
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thumbRects: SharedValue<Record<number, MeasuredDimensions | null>>
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imageIndex: number
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}) {
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const [fetchedDims, setFetchedDims] = useState<Dimensions | null>(null)
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const dims = fetchedDims ?? imageSrc.dimensions ?? imageSrc.thumbDimensions
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let imageAspect: number | undefined
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if (dims) {
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imageAspect = dims.width / dims.height
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if (Number.isNaN(imageAspect)) {
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imageAspect = undefined
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}
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}
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const {
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width: widthDelayedForJSThreadOnly,
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height: heightDelayedForJSThreadOnly,
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} = useWindowDimensions()
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const measureSafeArea = useCallback(() => {
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'worklet'
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let safeArea: Rect | null = measure(safeAreaRef)
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if (!safeArea) {
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if (_WORKLET) {
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console.error('Expected to always be able to measure safe area.')
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}
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safeArea = {
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x: 0,
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y: 0,
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width: widthDelayedForJSThreadOnly,
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height: heightDelayedForJSThreadOnly,
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}
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}
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return safeArea
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}, [safeAreaRef, heightDelayedForJSThreadOnly, widthDelayedForJSThreadOnly])
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const {thumbRect: thumbRectJS, thumbBorderRadius} = imageSrc
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const transforms = useDerivedValue<LightboxTransforms>(() => {
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'worklet'
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const safeArea = measureSafeArea()
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const openProgressValue = openProgress.get()
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const dismissTranslateY =
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isActive && openProgressValue === 1 ? dismissSwipeTranslateY.get() : 0
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if (openProgressValue === 0 && isFlyingAway.get()) {
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return {
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isHidden: true,
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isResting: false,
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borderRadius: 0,
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scaleAndMoveTransform: [],
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cropFrameTransform: [],
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cropContentTransform: [],
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}
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}
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if (isActive && imageAspect && openProgressValue < 1) {
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let thumbRect
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if (_WORKLET) {
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thumbRect = thumbRects.get()[imageIndex]
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} else {
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thumbRect = thumbRectJS
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}
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if (thumbRect) {
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return interpolateTransform(
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openProgressValue,
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thumbRect,
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safeArea,
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imageAspect,
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thumbBorderRadius,
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)
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}
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}
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return {
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isHidden: false,
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isResting: dismissTranslateY === 0,
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borderRadius: 0,
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scaleAndMoveTransform: [{translateY: dismissTranslateY}],
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cropFrameTransform: [],
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cropContentTransform: [],
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}
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})
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const dismissSwipePan = Gesture.Pan()
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.enabled(isActive && !isScaled)
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.activeOffsetY([-10, 10])
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.failOffsetX([-10, 10])
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.maxPointers(1)
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.onUpdate(e => {
|
|
'worklet'
|
|
if (openProgress.get() !== 1 || isFlyingAway.get()) {
|
|
return
|
|
}
|
|
dismissSwipeTranslateY.set(e.translationY)
|
|
})
|
|
.onEnd(e => {
|
|
'worklet'
|
|
if (openProgress.get() !== 1 || isFlyingAway.get()) {
|
|
return
|
|
}
|
|
if (Math.abs(e.velocityY) > 200) {
|
|
isFlyingAway.set(true)
|
|
if (dismissSwipeTranslateY.get() === 0) {
|
|
// HACK: If the initial value is 0, withDecay() animation doesn't start.
|
|
// This is a bug in Reanimated, but for now we'll work around it like this.
|
|
dismissSwipeTranslateY.set(1)
|
|
}
|
|
dismissSwipeTranslateY.set(() => {
|
|
'worklet'
|
|
return withDecay({
|
|
velocity: e.velocityY,
|
|
velocityFactor: Math.max(3500 / Math.abs(e.velocityY), 1), // Speed up if it's too slow.
|
|
deceleration: 1, // Danger! This relies on the reaction below stopping it.
|
|
reduceMotion: ReduceMotion.Never, // If this animation doesn't run, the image gets stuck - therefore override Reduce Motion
|
|
})
|
|
})
|
|
} else {
|
|
dismissSwipeTranslateY.set(() => {
|
|
'worklet'
|
|
return withSpring(0, {
|
|
stiffness: 700,
|
|
damping: 50,
|
|
reduceMotion: ReduceMotion.Never,
|
|
})
|
|
})
|
|
}
|
|
})
|
|
|
|
return (
|
|
<ImageItem
|
|
imageSrc={imageSrc}
|
|
onTap={onTap}
|
|
onZoom={onZoom}
|
|
onRequestClose={onRequestClose}
|
|
onLoad={setFetchedDims}
|
|
isScrollViewBeingDragged={isScrollViewBeingDragged}
|
|
showControls={showControls}
|
|
measureSafeArea={measureSafeArea}
|
|
imageAspect={imageAspect}
|
|
imageDimensions={dims ?? undefined}
|
|
dismissSwipePan={dismissSwipePan}
|
|
transforms={transforms}
|
|
/>
|
|
)
|
|
}
|
|
|
|
const styles = StyleSheet.create({
|
|
screen: {
|
|
position: 'absolute',
|
|
top: 0,
|
|
left: 0,
|
|
bottom: 0,
|
|
right: 0,
|
|
},
|
|
screenHidden: {
|
|
opacity: 0,
|
|
pointerEvents: 'none',
|
|
},
|
|
container: {
|
|
flex: 1,
|
|
},
|
|
backdrop: {
|
|
backgroundColor: '#000',
|
|
position: 'absolute',
|
|
top: 0,
|
|
bottom: 0,
|
|
left: 0,
|
|
right: 0,
|
|
},
|
|
controls: {
|
|
position: 'absolute',
|
|
top: 0,
|
|
bottom: 0,
|
|
left: 0,
|
|
right: 0,
|
|
gap: 20,
|
|
zIndex: 1,
|
|
pointerEvents: 'box-none',
|
|
},
|
|
pager: {
|
|
flex: 1,
|
|
},
|
|
})
|
|
|
|
function interpolatePx(
|
|
px: number,
|
|
inputRange: readonly number[],
|
|
outputRange: readonly number[],
|
|
) {
|
|
'worklet'
|
|
const value = interpolate(px, inputRange, outputRange)
|
|
return Math.round(value * PIXEL_RATIO) / PIXEL_RATIO
|
|
}
|
|
|
|
function interpolateTransform(
|
|
progress: number,
|
|
thumbnailDims: {
|
|
pageX: number
|
|
width: number
|
|
pageY: number
|
|
height: number
|
|
},
|
|
safeArea: {width: number; height: number; x: number; y: number},
|
|
imageAspect: number,
|
|
thumbBorderRadius?: number,
|
|
): {
|
|
scaleAndMoveTransform: Transform
|
|
cropFrameTransform: Transform
|
|
cropContentTransform: Transform
|
|
borderRadius: number
|
|
isResting: boolean
|
|
isHidden: boolean
|
|
} {
|
|
'worklet'
|
|
const thumbAspect = thumbnailDims.width / thumbnailDims.height
|
|
let uncroppedInitialWidth
|
|
let uncroppedInitialHeight
|
|
if (imageAspect > thumbAspect) {
|
|
uncroppedInitialWidth = thumbnailDims.height * imageAspect
|
|
uncroppedInitialHeight = thumbnailDims.height
|
|
} else {
|
|
uncroppedInitialWidth = thumbnailDims.width
|
|
uncroppedInitialHeight = thumbnailDims.width / imageAspect
|
|
}
|
|
const safeAreaAspect = safeArea.width / safeArea.height
|
|
let finalWidth
|
|
let finalHeight
|
|
if (safeAreaAspect > imageAspect) {
|
|
finalWidth = safeArea.height * imageAspect
|
|
finalHeight = safeArea.height
|
|
} else {
|
|
finalWidth = safeArea.width
|
|
finalHeight = safeArea.width / imageAspect
|
|
}
|
|
const initialScale = Math.min(
|
|
uncroppedInitialWidth / finalWidth,
|
|
uncroppedInitialHeight / finalHeight,
|
|
)
|
|
const croppedFinalWidth = thumbnailDims.width / initialScale
|
|
const croppedFinalHeight = thumbnailDims.height / initialScale
|
|
const screenCenterX = safeArea.width / 2
|
|
const screenCenterY = safeArea.height / 2
|
|
const thumbnailSafeAreaX = thumbnailDims.pageX - safeArea.x
|
|
const thumbnailSafeAreaY = thumbnailDims.pageY - safeArea.y
|
|
const thumbnailCenterX = thumbnailSafeAreaX + thumbnailDims.width / 2
|
|
const thumbnailCenterY = thumbnailSafeAreaY + thumbnailDims.height / 2
|
|
const initialTranslateX = thumbnailCenterX - screenCenterX
|
|
const initialTranslateY = thumbnailCenterY - screenCenterY
|
|
const scale = interpolate(progress, [0, 1], [initialScale, 1])
|
|
const translateX = interpolatePx(progress, [0, 1], [initialTranslateX, 0])
|
|
const translateY = interpolatePx(progress, [0, 1], [initialTranslateY, 0])
|
|
const cropScaleX = interpolate(
|
|
progress,
|
|
[0, 1],
|
|
[croppedFinalWidth / finalWidth, 1],
|
|
)
|
|
const cropScaleY = interpolate(
|
|
progress,
|
|
[0, 1],
|
|
[croppedFinalHeight / finalHeight, 1],
|
|
)
|
|
// The border radius in the source thumbnail needs to be scaled to account
|
|
// for the crop frame and overall scale so it visually matches at progress=0.
|
|
const sourceBorderRadius = thumbBorderRadius ?? 0
|
|
const initialCropScaleX = croppedFinalWidth / finalWidth
|
|
const borderRadius = interpolate(
|
|
progress,
|
|
[0, 1],
|
|
[sourceBorderRadius / (initialScale * initialCropScaleX), 0],
|
|
)
|
|
|
|
return {
|
|
isHidden: false,
|
|
isResting: progress === 1,
|
|
scaleAndMoveTransform: [{translateX}, {translateY}, {scale}],
|
|
cropFrameTransform: [{scaleX: cropScaleX}, {scaleY: cropScaleY}],
|
|
cropContentTransform: [{scaleX: 1 / cropScaleX}, {scaleY: 1 / cropScaleY}],
|
|
borderRadius,
|
|
}
|
|
}
|
|
|
|
function withClampedSpring<T extends AnimatableValue>(
|
|
value: T,
|
|
config: WithSpringConfig,
|
|
): T {
|
|
'worklet'
|
|
return withSpring(value, {...config, overshootClamping: true})
|
|
}
|
|
|
|
// We have to do this because we can't trust RN's rAF to fire in order.
|
|
// https://github.com/facebook/react-native/issues/48005
|
|
let isFrameScheduled = false
|
|
let pendingFrameCallbacks: Array<() => void> = []
|
|
function rAF_FIXED(callback: () => void) {
|
|
pendingFrameCallbacks.push(callback)
|
|
if (!isFrameScheduled) {
|
|
isFrameScheduled = true
|
|
requestAnimationFrame(() => {
|
|
const callbacks = pendingFrameCallbacks.slice()
|
|
isFrameScheduled = false
|
|
pendingFrameCallbacks = []
|
|
let hasError = false
|
|
let error
|
|
for (let i = 0; i < callbacks.length; i++) {
|
|
try {
|
|
callbacks[i]()
|
|
} catch (e) {
|
|
hasError = true
|
|
error = e
|
|
}
|
|
}
|
|
if (hasError) {
|
|
throw error
|
|
}
|
|
})
|
|
}
|
|
}
|