Refresh lightbox designs (#10330)
Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
Spence Pope
@@ -0,0 +1,469 @@
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import {memo, useState} from 'react'
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import {ActivityIndicator, StyleSheet} from 'react-native'
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import {
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Gesture,
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GestureDetector,
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type PanGesture,
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} from 'react-native-gesture-handler'
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import Animated, {
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type AnimatableValue,
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runOnJS,
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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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useSharedValue,
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withSpring,
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} from 'react-native-reanimated'
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import {Image} from 'expo-image'
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import {
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type Dimensions as ImageDimensions,
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type ImageSource,
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type LightboxTransforms,
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} from '../../types'
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import {
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applyRounding,
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createTransform,
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prependPan,
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prependPinch,
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prependTransform,
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readTransform,
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type TransformMatrix,
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} from '../transforms'
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const MIN_SCREEN_ZOOM = 2
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const MAX_ORIGINAL_IMAGE_ZOOM = 2
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const initialTransform = createTransform()
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type Props = {
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imageSrc: ImageSource
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onRequestClose: () => void
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onTap: () => void
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onZoom: (isZoomed: boolean) => void
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onLoad: (dims: ImageDimensions) => void
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isScrollViewBeingDragged: boolean
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showControls: boolean
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measureSafeArea: () => {
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x: number
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y: number
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width: number
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height: number
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}
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imageAspect: number | undefined
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imageDimensions: ImageDimensions | undefined
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dismissSwipePan: PanGesture
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transforms: Readonly<SharedValue<LightboxTransforms>>
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}
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const ImageItem = ({
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imageSrc,
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onTap,
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onZoom,
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onLoad,
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isScrollViewBeingDragged,
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measureSafeArea,
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imageAspect,
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imageDimensions,
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dismissSwipePan,
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transforms,
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}: Props) => {
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const [isScaled, setIsScaled] = useState(false)
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const committedTransform = useSharedValue(initialTransform)
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const panTranslation = useSharedValue({x: 0, y: 0})
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const pinchOrigin = useSharedValue({x: 0, y: 0})
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const pinchScale = useSharedValue(1)
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const pinchTranslation = useSharedValue({x: 0, y: 0})
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const containerRef = useAnimatedRef()
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// Keep track of when we're entering or leaving scaled rendering.
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// Note: DO NOT move any logic reading animated values outside this function.
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useAnimatedReaction(
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() => {
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if (pinchScale.get() !== 1) {
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// We're currently pinching.
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return true
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}
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const [, , committedScale] = readTransform(committedTransform.get())
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if (committedScale !== 1) {
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// We started from a pinched in state.
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return true
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}
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// We're at rest.
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return false
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},
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(nextIsScaled, prevIsScaled) => {
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if (nextIsScaled !== prevIsScaled) {
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runOnJS(handleZoom)(nextIsScaled)
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}
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},
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)
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function handleZoom(nextIsScaled: boolean) {
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setIsScaled(nextIsScaled)
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onZoom(nextIsScaled)
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}
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// On Android, stock apps prevent going "out of bounds" on pan or pinch. You should "bump" into edges.
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// If the user tried to pan too hard, this function will provide the negative panning to stay in bounds.
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function getExtraTranslationToStayInBounds(
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candidateTransform: TransformMatrix,
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screenSize: {width: number; height: number},
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) {
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'worklet'
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if (!imageAspect) {
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return [0, 0]
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}
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const [nextTranslateX, nextTranslateY, nextScale] =
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readTransform(candidateTransform)
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const scaledDimensions = getScaledDimensions(
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imageAspect,
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nextScale,
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screenSize,
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)
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const clampedTranslateX = clampTranslation(
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nextTranslateX,
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scaledDimensions.width,
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screenSize.width,
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)
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const clampedTranslateY = clampTranslation(
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nextTranslateY,
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scaledDimensions.height,
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screenSize.height,
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)
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const dx = clampedTranslateX - nextTranslateX
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const dy = clampedTranslateY - nextTranslateY
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return [dx, dy]
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}
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const pinch = Gesture.Pinch()
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.onStart(e => {
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'worklet'
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const screenSize = measureSafeArea()
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pinchOrigin.set({
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x: e.focalX - screenSize.width / 2,
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y: e.focalY - screenSize.height / 2,
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})
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})
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.onChange(e => {
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'worklet'
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const screenSize = measureSafeArea()
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if (!imageDimensions) {
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return
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}
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// Don't let the picture zoom in so close that it gets blurry.
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// Also, like in stock Android apps, don't let the user zoom out further than 1:1.
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const [, , committedScale] = readTransform(committedTransform.get())
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const maxCommittedScale = Math.max(
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MIN_SCREEN_ZOOM,
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(imageDimensions.width / screenSize.width) * MAX_ORIGINAL_IMAGE_ZOOM,
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)
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const minPinchScale = 1 / committedScale
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const maxPinchScale = maxCommittedScale / committedScale
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const nextPinchScale = Math.min(
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Math.max(minPinchScale, e.scale),
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maxPinchScale,
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)
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pinchScale.set(nextPinchScale)
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// Zooming out close to the corner could push us out of bounds, which we don't want on Android.
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// Calculate where we'll end up so we know how much to translate back to stay in bounds.
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const t = createTransform()
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prependPan(t, panTranslation.get())
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prependPinch(t, nextPinchScale, pinchOrigin.get(), pinchTranslation.get())
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prependTransform(t, committedTransform.get())
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const [dx, dy] = getExtraTranslationToStayInBounds(t, screenSize)
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if (dx !== 0 || dy !== 0) {
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const pt = pinchTranslation.get()
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pinchTranslation.set({
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x: pt.x + dx,
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y: pt.y + dy,
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})
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}
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})
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.onEnd(() => {
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'worklet'
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// Commit just the pinch.
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let t = createTransform()
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prependPinch(
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t,
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pinchScale.get(),
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pinchOrigin.get(),
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pinchTranslation.get(),
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)
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prependTransform(t, committedTransform.get())
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applyRounding(t)
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committedTransform.set(t)
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// Reset just the pinch.
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pinchScale.set(1)
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pinchOrigin.set({x: 0, y: 0})
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pinchTranslation.set({x: 0, y: 0})
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})
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const pan = Gesture.Pan()
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.averageTouches(true)
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// Unlike .enabled(isScaled), this ensures that an initial pinch can turn into a pan midway:
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.minPointers(isScaled ? 1 : 2)
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.onChange(e => {
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'worklet'
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const screenSize = measureSafeArea()
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if (!imageDimensions) {
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return
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}
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const nextPanTranslation = {x: e.translationX, y: e.translationY}
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let t = createTransform()
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prependPan(t, nextPanTranslation)
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prependPinch(
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t,
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pinchScale.get(),
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pinchOrigin.get(),
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pinchTranslation.get(),
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)
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prependTransform(t, committedTransform.get())
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// Prevent panning from going out of bounds.
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const [dx, dy] = getExtraTranslationToStayInBounds(t, screenSize)
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nextPanTranslation.x += dx
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nextPanTranslation.y += dy
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panTranslation.set(nextPanTranslation)
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})
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.onEnd(() => {
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'worklet'
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// Commit just the pan.
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let t = createTransform()
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prependPan(t, panTranslation.get())
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prependTransform(t, committedTransform.get())
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applyRounding(t)
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committedTransform.set(t)
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// Reset just the pan.
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panTranslation.set({x: 0, y: 0})
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})
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const singleTap = Gesture.Tap().onEnd(() => {
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'worklet'
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runOnJS(onTap)()
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})
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const doubleTap = Gesture.Tap()
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.numberOfTaps(2)
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.onEnd(e => {
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'worklet'
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const screenSize = measureSafeArea()
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if (!imageDimensions || !imageAspect) {
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return
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}
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const [, , committedScale] = readTransform(committedTransform.get())
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if (committedScale !== 1) {
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// Go back to 1:1 using the identity vector.
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let t = createTransform()
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committedTransform.set(withClampedSpring(t))
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return
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}
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// Try to zoom in so that we get rid of the black bars (whatever the orientation was).
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const screenAspect = screenSize.width / screenSize.height
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const candidateScale = Math.max(
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imageAspect / screenAspect,
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screenAspect / imageAspect,
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MIN_SCREEN_ZOOM,
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)
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// But don't zoom in so close that the picture gets blurry.
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const maxScale = Math.max(
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MIN_SCREEN_ZOOM,
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(imageDimensions.width / screenSize.width) * MAX_ORIGINAL_IMAGE_ZOOM,
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)
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const scale = Math.min(candidateScale, maxScale)
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// Calculate where we would be if the user pinched into the double tapped point.
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// We won't use this transform directly because it may go out of bounds.
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const candidateTransform = createTransform()
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const origin = {
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x: e.absoluteX - screenSize.width / 2,
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y: e.absoluteY - screenSize.height / 2,
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}
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prependPinch(candidateTransform, scale, origin, {x: 0, y: 0})
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// Now we know how much we went out of bounds, so we can shoot correctly.
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const [dx, dy] = getExtraTranslationToStayInBounds(
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candidateTransform,
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screenSize,
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)
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const finalTransform = createTransform()
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prependPinch(finalTransform, scale, origin, {x: dx, y: dy})
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committedTransform.set(withClampedSpring(finalTransform))
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})
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const composedGesture = isScrollViewBeingDragged
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? // If the parent is not at rest, provide a no-op gesture.
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Gesture.Manual()
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: Gesture.Exclusive(
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dismissSwipePan,
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Gesture.Simultaneous(pinch, pan),
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doubleTap,
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singleTap,
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)
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const containerStyle = useAnimatedStyle(() => {
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const {scaleAndMoveTransform, isHidden} = transforms.get()
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// Apply the active adjustments on top of the committed transform before the gestures.
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// This is matrix multiplication, so operations are applied in the reverse order.
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let t = createTransform()
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prependPan(t, panTranslation.get())
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prependPinch(t, pinchScale.get(), pinchOrigin.get(), pinchTranslation.get())
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prependTransform(t, committedTransform.get())
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const [translateX, translateY, scale] = readTransform(t)
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const manipulationTransform = [
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{translateX},
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{translateY: translateY},
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{scale},
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]
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const screenSize = measureSafeArea()
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return {
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opacity: isHidden ? 0 : 1,
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transform: scaleAndMoveTransform.concat(manipulationTransform),
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width: screenSize.width,
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maxHeight: screenSize.height,
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alignSelf: 'center',
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aspectRatio: imageAspect ?? 1 /* force onLoad */,
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}
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})
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const imageCropStyle = useAnimatedStyle(() => {
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const {cropFrameTransform, borderRadius: br} = transforms.get()
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return {
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flex: 1,
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overflow: 'hidden',
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transform: cropFrameTransform,
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borderRadius: br,
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}
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})
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const imageStyle = useAnimatedStyle(() => {
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const {cropContentTransform} = transforms.get()
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return {
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flex: 1,
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transform: cropContentTransform,
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opacity: imageAspect === undefined ? 0 : 1,
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}
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})
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const [showLoader, setShowLoader] = useState(false)
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const [hasLoaded, setHasLoaded] = useState(false)
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useAnimatedReaction(
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() => {
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return transforms.get().isResting && !hasLoaded
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},
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(show, prevShow) => {
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if (!prevShow && show) {
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runOnJS(setShowLoader)(true)
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} else if (prevShow && !show) {
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runOnJS(setShowLoader)(false)
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}
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},
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)
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const type = imageSrc.type
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const borderRadius =
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type === 'circle-avi' ? 1e5 : type === 'rect-avi' ? 20 : 0
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return (
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<GestureDetector gesture={composedGesture}>
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<Animated.View
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ref={containerRef}
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style={[styles.container]}
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renderToHardwareTextureAndroid>
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<Animated.View style={containerStyle}>
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{showLoader && (
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<ActivityIndicator
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size="small"
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color="#FFF"
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style={styles.loading}
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/>
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)}
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<Animated.View style={imageCropStyle}>
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<Animated.View style={imageStyle}>
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<Image
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contentFit="contain"
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source={{uri: imageSrc.uri}}
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placeholderContentFit="contain"
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placeholder={{uri: imageSrc.thumbUri}}
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accessibilityLabel={imageSrc.alt}
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onLoad={
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hasLoaded
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? undefined
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: e => {
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setHasLoaded(true)
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onLoad({width: e.source.width, height: e.source.height})
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}
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}
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style={{flex: 1, borderRadius}}
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||||
accessibilityHint=""
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accessibilityIgnoresInvertColors
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cachePolicy="memory"
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/>
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</Animated.View>
|
||||
</Animated.View>
|
||||
</Animated.View>
|
||||
</Animated.View>
|
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</GestureDetector>
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||||
)
|
||||
}
|
||||
|
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const styles = StyleSheet.create({
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||||
container: {
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||||
height: '100%',
|
||||
overflow: 'hidden',
|
||||
justifyContent: 'center',
|
||||
},
|
||||
loading: {
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||||
position: 'absolute',
|
||||
left: 0,
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right: 0,
|
||||
top: 0,
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bottom: 0,
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||||
justifyContent: 'center',
|
||||
},
|
||||
})
|
||||
|
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function getScaledDimensions(
|
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imageAspect: number,
|
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scale: number,
|
||||
screenSize: {width: number; height: number},
|
||||
): ImageDimensions {
|
||||
'worklet'
|
||||
const screenAspect = screenSize.width / screenSize.height
|
||||
const isLandscape = imageAspect > screenAspect
|
||||
if (isLandscape) {
|
||||
return {
|
||||
width: scale * screenSize.width,
|
||||
height: (scale * screenSize.width) / imageAspect,
|
||||
}
|
||||
} else {
|
||||
return {
|
||||
width: scale * screenSize.height * imageAspect,
|
||||
height: scale * screenSize.height,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
function clampTranslation(
|
||||
value: number,
|
||||
scaledSize: number,
|
||||
screenSize: number,
|
||||
): number {
|
||||
'worklet'
|
||||
// Figure out how much the user should be allowed to pan, and constrain the translation.
|
||||
const panDistance = Math.max(0, (scaledSize - screenSize) / 2)
|
||||
const clampedValue = Math.min(Math.max(-panDistance, value), panDistance)
|
||||
return clampedValue
|
||||
}
|
||||
|
||||
function withClampedSpring<T extends AnimatableValue>(value: T): T {
|
||||
'worklet'
|
||||
return withSpring(value, {overshootClamping: true})
|
||||
}
|
||||
|
||||
export default memo(ImageItem)
|
||||
@@ -0,0 +1,359 @@
|
||||
/**
|
||||
* Copyright (c) JOB TODAY S.A. and its affiliates.
|
||||
*
|
||||
* This source code is licensed under the MIT license found in the
|
||||
* LICENSE file in the root directory of this source tree.
|
||||
*
|
||||
*/
|
||||
|
||||
import {memo, useState} from 'react'
|
||||
import {ActivityIndicator, StyleSheet} from 'react-native'
|
||||
import {
|
||||
Gesture,
|
||||
GestureDetector,
|
||||
type PanGesture,
|
||||
} from 'react-native-gesture-handler'
|
||||
import Animated, {
|
||||
runOnJS,
|
||||
type SharedValue,
|
||||
useAnimatedProps,
|
||||
useAnimatedReaction,
|
||||
useAnimatedRef,
|
||||
useAnimatedScrollHandler,
|
||||
useAnimatedStyle,
|
||||
useSharedValue,
|
||||
} from 'react-native-reanimated'
|
||||
import {useSafeAreaFrame} from 'react-native-safe-area-context'
|
||||
import {Image} from 'expo-image'
|
||||
|
||||
import {
|
||||
type Dimensions as ImageDimensions,
|
||||
type ImageSource,
|
||||
type LightboxTransforms,
|
||||
} from '../../types'
|
||||
|
||||
const MAX_ORIGINAL_IMAGE_ZOOM = 2
|
||||
const MIN_SCREEN_ZOOM = 2
|
||||
|
||||
type Props = {
|
||||
imageSrc: ImageSource
|
||||
onRequestClose: () => void
|
||||
onTap: () => void
|
||||
onZoom: (scaled: boolean) => void
|
||||
onLoad: (dims: ImageDimensions) => void
|
||||
isScrollViewBeingDragged: boolean
|
||||
showControls: boolean
|
||||
measureSafeArea: () => {
|
||||
x: number
|
||||
y: number
|
||||
width: number
|
||||
height: number
|
||||
}
|
||||
imageAspect: number | undefined
|
||||
imageDimensions: ImageDimensions | undefined
|
||||
dismissSwipePan: PanGesture
|
||||
transforms: Readonly<SharedValue<LightboxTransforms>>
|
||||
}
|
||||
|
||||
const ImageItem = ({
|
||||
imageSrc,
|
||||
onTap,
|
||||
onZoom,
|
||||
onLoad,
|
||||
showControls,
|
||||
measureSafeArea,
|
||||
imageAspect,
|
||||
imageDimensions,
|
||||
dismissSwipePan,
|
||||
transforms,
|
||||
}: Props) => {
|
||||
const scrollViewRef = useAnimatedRef<Animated.ScrollView>()
|
||||
const [scaled, setScaled] = useState(false)
|
||||
const isDragging = useSharedValue(false)
|
||||
const screenSizeDelayedForJSThreadOnly = useSafeAreaFrame()
|
||||
const maxZoomScale = Math.max(
|
||||
MIN_SCREEN_ZOOM,
|
||||
imageDimensions
|
||||
? (imageDimensions.width / screenSizeDelayedForJSThreadOnly.width) *
|
||||
MAX_ORIGINAL_IMAGE_ZOOM
|
||||
: 1,
|
||||
)
|
||||
|
||||
const scrollHandler = useAnimatedScrollHandler({
|
||||
onScroll(e) {
|
||||
'worklet'
|
||||
const nextIsScaled = e.zoomScale > 1
|
||||
if (scaled !== nextIsScaled) {
|
||||
runOnJS(handleZoom)(nextIsScaled)
|
||||
}
|
||||
},
|
||||
onBeginDrag() {
|
||||
'worklet'
|
||||
isDragging.value = true
|
||||
},
|
||||
onEndDrag() {
|
||||
'worklet'
|
||||
isDragging.value = false
|
||||
},
|
||||
})
|
||||
|
||||
function handleZoom(nextIsScaled: boolean) {
|
||||
onZoom(nextIsScaled)
|
||||
setScaled(nextIsScaled)
|
||||
}
|
||||
|
||||
function zoomTo(nextZoomRect: {
|
||||
x: number
|
||||
y: number
|
||||
width: number
|
||||
height: number
|
||||
}) {
|
||||
const scrollResponderRef = scrollViewRef?.current?.getScrollResponder()
|
||||
// @ts-ignore
|
||||
scrollResponderRef?.scrollResponderZoomTo({
|
||||
...nextZoomRect, // This rect is in screen coordinates
|
||||
animated: true,
|
||||
})
|
||||
}
|
||||
|
||||
const singleTap = Gesture.Tap().onEnd(() => {
|
||||
'worklet'
|
||||
runOnJS(onTap)()
|
||||
})
|
||||
|
||||
const doubleTap = Gesture.Tap()
|
||||
.numberOfTaps(2)
|
||||
.onEnd(e => {
|
||||
'worklet'
|
||||
const screenSize = measureSafeArea()
|
||||
const {absoluteX, absoluteY} = e
|
||||
let nextZoomRect = {
|
||||
x: 0,
|
||||
y: 0,
|
||||
width: screenSize.width,
|
||||
height: screenSize.height,
|
||||
}
|
||||
const willZoom = !scaled
|
||||
if (willZoom) {
|
||||
nextZoomRect = getZoomRectAfterDoubleTap(
|
||||
imageAspect,
|
||||
absoluteX,
|
||||
absoluteY,
|
||||
screenSize,
|
||||
)
|
||||
}
|
||||
runOnJS(zoomTo)(nextZoomRect)
|
||||
})
|
||||
|
||||
const composedGesture = Gesture.Exclusive(
|
||||
dismissSwipePan,
|
||||
doubleTap,
|
||||
singleTap,
|
||||
)
|
||||
|
||||
const containerStyle = useAnimatedStyle(() => {
|
||||
const {scaleAndMoveTransform, isHidden} = transforms.get()
|
||||
return {
|
||||
flex: 1,
|
||||
transform: scaleAndMoveTransform,
|
||||
opacity: isHidden ? 0 : 1,
|
||||
}
|
||||
})
|
||||
|
||||
const imageCropStyle = useAnimatedStyle(() => {
|
||||
const screenSize = measureSafeArea()
|
||||
const {cropFrameTransform, borderRadius: br} = transforms.get()
|
||||
return {
|
||||
overflow: 'hidden',
|
||||
transform: cropFrameTransform,
|
||||
borderRadius: br,
|
||||
width: screenSize.width,
|
||||
maxHeight: screenSize.height,
|
||||
alignSelf: 'center',
|
||||
aspectRatio: imageAspect ?? 1 /* force onLoad */,
|
||||
opacity: imageAspect === undefined ? 0 : 1,
|
||||
}
|
||||
})
|
||||
|
||||
const imageStyle = useAnimatedStyle(() => {
|
||||
const {cropContentTransform} = transforms.get()
|
||||
return {
|
||||
transform: cropContentTransform,
|
||||
width: '100%',
|
||||
aspectRatio: imageAspect ?? 1 /* force onLoad */,
|
||||
opacity: imageAspect === undefined ? 0 : 1,
|
||||
}
|
||||
})
|
||||
|
||||
const [showLoader, setShowLoader] = useState(false)
|
||||
const [hasLoaded, setHasLoaded] = useState(false)
|
||||
useAnimatedReaction(
|
||||
() => {
|
||||
return transforms.get().isResting && !hasLoaded
|
||||
},
|
||||
(show, prevShow) => {
|
||||
if (!prevShow && show) {
|
||||
runOnJS(setShowLoader)(true)
|
||||
} else if (prevShow && !show) {
|
||||
runOnJS(setShowLoader)(false)
|
||||
}
|
||||
},
|
||||
)
|
||||
|
||||
const type = imageSrc.type
|
||||
const borderRadius =
|
||||
type === 'circle-avi' ? 1e5 : type === 'rect-avi' ? 20 : 0
|
||||
|
||||
const scrollViewProps = useAnimatedProps(() => ({
|
||||
// Don't allow bounce at 1:1 rest so it can be swiped away.
|
||||
bounces: scaled || isDragging.value,
|
||||
}))
|
||||
|
||||
return (
|
||||
<GestureDetector gesture={composedGesture}>
|
||||
<Animated.ScrollView
|
||||
// @ts-ignore Something's up with the types here
|
||||
ref={scrollViewRef}
|
||||
pinchGestureEnabled
|
||||
showsHorizontalScrollIndicator={false}
|
||||
showsVerticalScrollIndicator={false}
|
||||
maximumZoomScale={maxZoomScale}
|
||||
onScroll={scrollHandler}
|
||||
style={containerStyle}
|
||||
animatedProps={scrollViewProps}
|
||||
centerContent>
|
||||
{showLoader && (
|
||||
<ActivityIndicator size="small" color="#FFF" style={styles.loading} />
|
||||
)}
|
||||
<Animated.View style={imageCropStyle}>
|
||||
<Animated.View style={imageStyle}>
|
||||
<Image
|
||||
contentFit="contain"
|
||||
source={{uri: imageSrc.uri}}
|
||||
placeholderContentFit="contain"
|
||||
placeholder={{uri: imageSrc.thumbUri}}
|
||||
style={{flex: 1, borderRadius}}
|
||||
accessibilityLabel={imageSrc.alt}
|
||||
accessibilityHint=""
|
||||
enableLiveTextInteraction={showControls && !scaled}
|
||||
accessibilityIgnoresInvertColors
|
||||
onLoad={
|
||||
hasLoaded
|
||||
? undefined
|
||||
: e => {
|
||||
setHasLoaded(true)
|
||||
onLoad({width: e.source.width, height: e.source.height})
|
||||
}
|
||||
}
|
||||
cachePolicy="memory"
|
||||
/>
|
||||
</Animated.View>
|
||||
</Animated.View>
|
||||
</Animated.ScrollView>
|
||||
</GestureDetector>
|
||||
)
|
||||
}
|
||||
|
||||
const styles = StyleSheet.create({
|
||||
loading: {
|
||||
position: 'absolute',
|
||||
top: 0,
|
||||
left: 0,
|
||||
right: 0,
|
||||
bottom: 0,
|
||||
},
|
||||
image: {
|
||||
flex: 1,
|
||||
},
|
||||
})
|
||||
|
||||
const getZoomRectAfterDoubleTap = (
|
||||
imageAspect: number | undefined,
|
||||
touchX: number,
|
||||
touchY: number,
|
||||
screenSize: {width: number; height: number},
|
||||
): {
|
||||
x: number
|
||||
y: number
|
||||
width: number
|
||||
height: number
|
||||
} => {
|
||||
'worklet'
|
||||
if (!imageAspect) {
|
||||
return {
|
||||
x: 0,
|
||||
y: 0,
|
||||
width: screenSize.width,
|
||||
height: screenSize.height,
|
||||
}
|
||||
}
|
||||
|
||||
// First, let's figure out how much we want to zoom in.
|
||||
// We want to try to zoom in at least close enough to get rid of black bars.
|
||||
const screenAspect = screenSize.width / screenSize.height
|
||||
const zoom = Math.max(
|
||||
imageAspect / screenAspect,
|
||||
screenAspect / imageAspect,
|
||||
MIN_SCREEN_ZOOM,
|
||||
)
|
||||
// Unlike in the Android version, we don't constrain the *max* zoom level here.
|
||||
// Instead, this is done in the ScrollView props so that it constraints pinch too.
|
||||
|
||||
// Next, we'll be calculating the rectangle to "zoom into" in screen coordinates.
|
||||
// We already know the zoom level, so this gives us the rectangle size.
|
||||
let rectWidth = screenSize.width / zoom
|
||||
let rectHeight = screenSize.height / zoom
|
||||
|
||||
// Before we settle on the zoomed rect, figure out the safe area it has to be inside.
|
||||
// We don't want to introduce new black bars or make existing black bars unbalanced.
|
||||
let minX = 0
|
||||
let minY = 0
|
||||
let maxX = screenSize.width - rectWidth
|
||||
let maxY = screenSize.height - rectHeight
|
||||
if (imageAspect >= screenAspect) {
|
||||
// The image has horizontal black bars. Exclude them from the safe area.
|
||||
const renderedHeight = screenSize.width / imageAspect
|
||||
const horizontalBarHeight = (screenSize.height - renderedHeight) / 2
|
||||
minY += horizontalBarHeight
|
||||
maxY -= horizontalBarHeight
|
||||
} else {
|
||||
// The image has vertical black bars. Exclude them from the safe area.
|
||||
const renderedWidth = screenSize.height * imageAspect
|
||||
const verticalBarWidth = (screenSize.width - renderedWidth) / 2
|
||||
minX += verticalBarWidth
|
||||
maxX -= verticalBarWidth
|
||||
}
|
||||
|
||||
// Finally, we can position the rect according to its size and the safe area.
|
||||
let rectX
|
||||
if (maxX >= minX) {
|
||||
// Content fills the screen horizontally so we have horizontal wiggle room.
|
||||
// Try to keep the tapped point under the finger after zoom.
|
||||
rectX = touchX - touchX / zoom
|
||||
rectX = Math.min(rectX, maxX)
|
||||
rectX = Math.max(rectX, minX)
|
||||
} else {
|
||||
// Keep the rect centered on the screen so that black bars are balanced.
|
||||
rectX = screenSize.width / 2 - rectWidth / 2
|
||||
}
|
||||
let rectY
|
||||
if (maxY >= minY) {
|
||||
// Content fills the screen vertically so we have vertical wiggle room.
|
||||
// Try to keep the tapped point under the finger after zoom.
|
||||
rectY = touchY - touchY / zoom
|
||||
rectY = Math.min(rectY, maxY)
|
||||
rectY = Math.max(rectY, minY)
|
||||
} else {
|
||||
// Keep the rect centered on the screen so that black bars are balanced.
|
||||
rectY = screenSize.height / 2 - rectHeight / 2
|
||||
}
|
||||
|
||||
return {
|
||||
x: rectX,
|
||||
y: rectY,
|
||||
height: rectHeight,
|
||||
width: rectWidth,
|
||||
}
|
||||
}
|
||||
|
||||
export default memo(ImageItem)
|
||||
@@ -0,0 +1,39 @@
|
||||
// default implementation fallback for web
|
||||
|
||||
import {memo} from 'react'
|
||||
import {View} from 'react-native'
|
||||
import {type PanGesture} from 'react-native-gesture-handler'
|
||||
import {type SharedValue} from 'react-native-reanimated'
|
||||
|
||||
import {type Dimensions} from '#/lib/media/types'
|
||||
import {
|
||||
type Dimensions as ImageDimensions,
|
||||
type ImageSource,
|
||||
type LightboxTransforms,
|
||||
} from '../../types'
|
||||
|
||||
type Props = {
|
||||
imageSrc: ImageSource
|
||||
onRequestClose: () => void
|
||||
onTap: () => void
|
||||
onZoom: (scaled: boolean) => void
|
||||
onLoad: (dims: Dimensions) => void
|
||||
isScrollViewBeingDragged: boolean
|
||||
showControls: boolean
|
||||
measureSafeArea: () => {
|
||||
x: number
|
||||
y: number
|
||||
width: number
|
||||
height: number
|
||||
}
|
||||
imageAspect: number | undefined
|
||||
imageDimensions: ImageDimensions | undefined
|
||||
dismissSwipePan: PanGesture
|
||||
transforms: Readonly<SharedValue<LightboxTransforms>>
|
||||
}
|
||||
|
||||
const ImageItem = (_props: Props) => {
|
||||
return <View />
|
||||
}
|
||||
|
||||
export default memo(ImageItem)
|
||||
@@ -0,0 +1,774 @@
|
||||
/**
|
||||
* Copyright (c) JOB TODAY S.A. and its affiliates.
|
||||
*
|
||||
* This source code is licensed under the MIT license found in the
|
||||
* LICENSE file in the root directory of this source tree.
|
||||
*
|
||||
*/
|
||||
// Original code copied and simplified from the link below as the codebase is currently not maintained:
|
||||
// https://github.com/jobtoday/react-native-image-viewing
|
||||
import {useCallback, useEffect, useMemo, useState} from 'react'
|
||||
import {PixelRatio, StyleSheet, useWindowDimensions, View} from 'react-native'
|
||||
import {SystemBars} from 'react-native-edge-to-edge'
|
||||
import {Gesture} from 'react-native-gesture-handler'
|
||||
import PagerView from 'react-native-pager-view'
|
||||
import Animated, {
|
||||
type AnimatableValue,
|
||||
type AnimatedRef,
|
||||
cancelAnimation,
|
||||
interpolate,
|
||||
measure,
|
||||
type MeasuredDimensions,
|
||||
ReduceMotion,
|
||||
runOnJS,
|
||||
runOnUI,
|
||||
type SharedValue,
|
||||
useAnimatedReaction,
|
||||
useAnimatedRef,
|
||||
useAnimatedStyle,
|
||||
useDerivedValue,
|
||||
useSharedValue,
|
||||
withDecay,
|
||||
withSpring,
|
||||
type WithSpringConfig,
|
||||
} from 'react-native-reanimated'
|
||||
import * as ScreenOrientation from 'expo-screen-orientation'
|
||||
|
||||
import {type Dimensions} from '#/lib/media/types'
|
||||
import {useTheme} from '#/alf'
|
||||
import {setSystemUITheme} from '#/alf/util/systemUI'
|
||||
import {type Lightbox} from '#/components/Lightbox/state'
|
||||
import {IS_IOS} from '#/env'
|
||||
import {PlatformInfo} from '../../../../modules/expo-bluesky-swiss-army'
|
||||
import {Footer} from '../chrome/Footer'
|
||||
import {Header} from '../chrome/Header'
|
||||
import {
|
||||
type ImageSource,
|
||||
type LightboxTransforms,
|
||||
type Transform,
|
||||
} from '../types'
|
||||
import ImageItem from './ImageItem/ImageItem'
|
||||
|
||||
type Rect = {x: number; y: number; width: number; height: number}
|
||||
|
||||
const PORTRAIT_UP = ScreenOrientation.OrientationLock.PORTRAIT_UP
|
||||
const PIXEL_RATIO = PixelRatio.get()
|
||||
|
||||
const SLOW_SPRING: WithSpringConfig = {
|
||||
mass: IS_IOS ? 1.25 : 0.75,
|
||||
damping: 300,
|
||||
stiffness: 800,
|
||||
restDisplacementThreshold: 0.001,
|
||||
}
|
||||
const FAST_SPRING: WithSpringConfig = {
|
||||
mass: IS_IOS ? 1.25 : 0.75,
|
||||
damping: 150,
|
||||
stiffness: 900,
|
||||
restDisplacementThreshold: 0.001,
|
||||
}
|
||||
|
||||
function canAnimate(lightbox: Lightbox): boolean {
|
||||
if (PlatformInfo.getIsReducedMotionEnabled()) {
|
||||
return false
|
||||
}
|
||||
const img = lightbox.images[lightbox.index]
|
||||
return !!img.thumbRect && !!(img.dimensions || img.thumbDimensions)
|
||||
}
|
||||
|
||||
export default function ImageViewRoot({
|
||||
lightbox: nextLightbox,
|
||||
onRequestClose,
|
||||
onPressSave,
|
||||
onPressShare,
|
||||
}: {
|
||||
lightbox: Lightbox | null
|
||||
onRequestClose: () => void
|
||||
onPressSave: (uri: string) => void
|
||||
onPressShare: (uri: string) => void
|
||||
}) {
|
||||
'use no memo'
|
||||
const ref = useAnimatedRef<View>()
|
||||
const [activeLightbox, setActiveLightbox] = useState(nextLightbox)
|
||||
const [orientation, setOrientation] = useState<'portrait' | 'landscape'>(
|
||||
'portrait',
|
||||
)
|
||||
const openProgress = useSharedValue(0)
|
||||
const thumbRects = useSharedValue<Record<number, MeasuredDimensions | null>>(
|
||||
{},
|
||||
)
|
||||
|
||||
if (!activeLightbox && nextLightbox) {
|
||||
setActiveLightbox(nextLightbox)
|
||||
}
|
||||
|
||||
useEffect(() => {
|
||||
if (!nextLightbox) {
|
||||
return
|
||||
}
|
||||
|
||||
const initial: Record<number, MeasuredDimensions | null> = {}
|
||||
nextLightbox.images.forEach((img, i) => {
|
||||
initial[i] = img.thumbRect ?? null
|
||||
})
|
||||
thumbRects.set(initial)
|
||||
|
||||
const isAnimated = canAnimate(nextLightbox)
|
||||
|
||||
// https://github.com/software-mansion/react-native-reanimated/issues/6677
|
||||
rAF_FIXED(() => {
|
||||
openProgress.set(() =>
|
||||
isAnimated ? withClampedSpring(1, SLOW_SPRING) : 1,
|
||||
)
|
||||
})
|
||||
return () => {
|
||||
// https://github.com/software-mansion/react-native-reanimated/issues/6677
|
||||
rAF_FIXED(() => {
|
||||
openProgress.set(() =>
|
||||
isAnimated ? withClampedSpring(0, SLOW_SPRING) : 0,
|
||||
)
|
||||
})
|
||||
}
|
||||
}, [nextLightbox, openProgress, thumbRects])
|
||||
|
||||
const onFullyClosed = useCallback(() => {
|
||||
setActiveLightbox(null)
|
||||
runOnUI(() => {
|
||||
'worklet'
|
||||
thumbRects.set({})
|
||||
})()
|
||||
}, [thumbRects])
|
||||
|
||||
useAnimatedReaction(
|
||||
() => openProgress.get() === 0,
|
||||
(isGone, wasGone) => {
|
||||
if (isGone && !wasGone) {
|
||||
runOnJS(onFullyClosed)()
|
||||
}
|
||||
},
|
||||
)
|
||||
|
||||
// Delay the unlock until after we've finished the scale up animation.
|
||||
// It's complicated to do the same for locking it back so we don't attempt that.
|
||||
useAnimatedReaction(
|
||||
() => openProgress.get() === 1,
|
||||
(isOpen, wasOpen) => {
|
||||
if (isOpen && !wasOpen) {
|
||||
runOnJS(ScreenOrientation.unlockAsync)()
|
||||
} else if (!isOpen && wasOpen) {
|
||||
// default is PORTRAIT_UP - set via config plugin in app.config.js -sfn
|
||||
runOnJS(ScreenOrientation.lockAsync)(PORTRAIT_UP)
|
||||
}
|
||||
},
|
||||
)
|
||||
|
||||
const onFlyAway = useCallback(() => {
|
||||
'worklet'
|
||||
openProgress.set(0)
|
||||
runOnJS(onRequestClose)()
|
||||
}, [onRequestClose, openProgress])
|
||||
|
||||
return (
|
||||
// Keep it always mounted to avoid flicker on the first frame.
|
||||
<View
|
||||
style={[styles.screen, !activeLightbox && styles.screenHidden]}
|
||||
aria-modal
|
||||
accessibilityViewIsModal
|
||||
aria-hidden={!activeLightbox}>
|
||||
<Animated.View
|
||||
ref={ref}
|
||||
style={{flex: 1}}
|
||||
collapsable={false}
|
||||
onLayout={e => {
|
||||
const layout = e.nativeEvent.layout
|
||||
setOrientation(
|
||||
layout.height > layout.width ? 'portrait' : 'landscape',
|
||||
)
|
||||
}}>
|
||||
{activeLightbox && (
|
||||
<ImageView
|
||||
key={activeLightbox.id + '-' + orientation}
|
||||
lightbox={activeLightbox}
|
||||
orientation={orientation}
|
||||
onRequestClose={onRequestClose}
|
||||
onPressSave={onPressSave}
|
||||
onPressShare={onPressShare}
|
||||
onFlyAway={onFlyAway}
|
||||
safeAreaRef={ref}
|
||||
openProgress={openProgress}
|
||||
thumbRects={thumbRects}
|
||||
/>
|
||||
)}
|
||||
</Animated.View>
|
||||
</View>
|
||||
)
|
||||
}
|
||||
|
||||
function ImageView({
|
||||
lightbox,
|
||||
orientation,
|
||||
onRequestClose,
|
||||
onPressSave,
|
||||
onPressShare,
|
||||
onFlyAway,
|
||||
safeAreaRef,
|
||||
openProgress,
|
||||
thumbRects,
|
||||
}: {
|
||||
lightbox: Lightbox
|
||||
orientation: 'portrait' | 'landscape'
|
||||
onRequestClose: () => void
|
||||
onPressSave: (uri: string) => void
|
||||
onPressShare: (uri: string) => void
|
||||
onFlyAway: () => void
|
||||
safeAreaRef: AnimatedRef<View>
|
||||
openProgress: SharedValue<number>
|
||||
thumbRects: SharedValue<Record<number, MeasuredDimensions | null>>
|
||||
}) {
|
||||
const {images, index: initialImageIndex} = lightbox
|
||||
const isAnimated = useMemo(() => canAnimate(lightbox), [lightbox])
|
||||
const [isScaled, setIsScaled] = useState(false)
|
||||
const [isDragging, setIsDragging] = useState(false)
|
||||
const [imageIndex, setImageIndex] = useState(initialImageIndex)
|
||||
const [showControls, setShowControls] = useState(true)
|
||||
const [isAltExpanded, setIsAltExpanded] = useState(false)
|
||||
const dismissSwipeTranslateY = useSharedValue(0)
|
||||
const isFlyingAway = useSharedValue(false)
|
||||
|
||||
const containerStyle = useAnimatedStyle(() => {
|
||||
if (openProgress.get() < 1) {
|
||||
return {
|
||||
pointerEvents: 'none',
|
||||
opacity: isAnimated ? 1 : 0,
|
||||
}
|
||||
}
|
||||
if (isFlyingAway.get()) {
|
||||
return {
|
||||
pointerEvents: 'none',
|
||||
opacity: 1,
|
||||
}
|
||||
}
|
||||
return {pointerEvents: 'auto', opacity: 1}
|
||||
})
|
||||
|
||||
const backdropStyle = useAnimatedStyle(() => {
|
||||
const screenSize = measure(safeAreaRef)
|
||||
let opacity = 1
|
||||
const openProgressValue = openProgress.get()
|
||||
if (openProgressValue < 1) {
|
||||
opacity = Math.sqrt(openProgressValue)
|
||||
} else if (screenSize && orientation === 'portrait') {
|
||||
const dragProgress = Math.min(
|
||||
Math.abs(dismissSwipeTranslateY.get()) / (screenSize.height / 2),
|
||||
1,
|
||||
)
|
||||
opacity -= dragProgress
|
||||
}
|
||||
const factor = IS_IOS ? 100 : 50
|
||||
return {
|
||||
opacity: Math.round(opacity * factor) / factor,
|
||||
}
|
||||
})
|
||||
|
||||
const animatedHeaderStyle = useAnimatedStyle(() => {
|
||||
const show = showControls && dismissSwipeTranslateY.get() === 0
|
||||
return {
|
||||
pointerEvents: show ? 'box-none' : 'none',
|
||||
opacity: withClampedSpring(
|
||||
show && openProgress.get() === 1 ? 1 : 0,
|
||||
FAST_SPRING,
|
||||
),
|
||||
transform: [
|
||||
{
|
||||
translateY: withClampedSpring(show ? 0 : -30, FAST_SPRING),
|
||||
},
|
||||
],
|
||||
}
|
||||
})
|
||||
const animatedFooterStyle = useAnimatedStyle(() => {
|
||||
const show = showControls && dismissSwipeTranslateY.get() === 0
|
||||
return {
|
||||
flexGrow: 1,
|
||||
pointerEvents: show ? 'box-none' : 'none',
|
||||
opacity: withClampedSpring(
|
||||
show && openProgress.get() === 1 ? 1 : 0,
|
||||
FAST_SPRING,
|
||||
),
|
||||
transform: [
|
||||
{
|
||||
translateY: withClampedSpring(show ? 0 : 30, FAST_SPRING),
|
||||
},
|
||||
],
|
||||
}
|
||||
})
|
||||
|
||||
const handleRequestClose = useCallback(() => {
|
||||
const activeRef = images[imageIndex]?.thumbRef
|
||||
if (isAnimated && activeRef) {
|
||||
runOnUI(() => {
|
||||
'worklet'
|
||||
const rect = measure(activeRef)
|
||||
thumbRects.modify(rects => {
|
||||
'worklet'
|
||||
rects[imageIndex] = rect
|
||||
return rects
|
||||
})
|
||||
runOnJS(onRequestClose)()
|
||||
})()
|
||||
} else {
|
||||
onRequestClose()
|
||||
}
|
||||
}, [isAnimated, images, imageIndex, thumbRects, onRequestClose])
|
||||
|
||||
const onTap = useCallback(() => {
|
||||
setShowControls(show => !show)
|
||||
}, [])
|
||||
|
||||
const onZoom = useCallback((nextIsScaled: boolean) => {
|
||||
setIsScaled(nextIsScaled)
|
||||
if (nextIsScaled) {
|
||||
setShowControls(false)
|
||||
}
|
||||
}, [])
|
||||
|
||||
useAnimatedReaction(
|
||||
() => {
|
||||
const screenSize = measure(safeAreaRef)
|
||||
return (
|
||||
!screenSize ||
|
||||
Math.abs(dismissSwipeTranslateY.get()) > screenSize.height
|
||||
)
|
||||
},
|
||||
(isOut, wasOut) => {
|
||||
if (isOut && !wasOut) {
|
||||
// Stop the animation from blocking the screen forever.
|
||||
cancelAnimation(dismissSwipeTranslateY)
|
||||
onFlyAway()
|
||||
}
|
||||
},
|
||||
)
|
||||
|
||||
// style system ui on android
|
||||
const t = useTheme()
|
||||
useEffect(() => {
|
||||
setSystemUITheme('lightbox', t)
|
||||
return () => {
|
||||
setSystemUITheme('theme', t)
|
||||
}
|
||||
}, [t])
|
||||
|
||||
return (
|
||||
<Animated.View style={[styles.container, containerStyle]}>
|
||||
<SystemBars
|
||||
style={{statusBar: 'light', navigationBar: 'light'}}
|
||||
hidden={{
|
||||
statusBar: isScaled || !showControls,
|
||||
navigationBar: false,
|
||||
}}
|
||||
/>
|
||||
<Animated.View
|
||||
style={[styles.backdrop, backdropStyle]}
|
||||
renderToHardwareTextureAndroid
|
||||
/>
|
||||
<PagerView
|
||||
scrollEnabled={!isScaled}
|
||||
initialPage={initialImageIndex}
|
||||
onPageSelected={e => {
|
||||
setImageIndex(e.nativeEvent.position)
|
||||
setIsScaled(false)
|
||||
}}
|
||||
onPageScrollStateChanged={e => {
|
||||
setIsDragging(e.nativeEvent.pageScrollState !== 'idle')
|
||||
}}
|
||||
overdrag={true}
|
||||
style={styles.pager}>
|
||||
{images.map((imageSrc, i) => (
|
||||
<View key={`${i}-${imageSrc.uri}`}>
|
||||
<LightboxImage
|
||||
onTap={onTap}
|
||||
onZoom={onZoom}
|
||||
imageSrc={imageSrc}
|
||||
onRequestClose={handleRequestClose}
|
||||
isScrollViewBeingDragged={isDragging}
|
||||
showControls={showControls}
|
||||
safeAreaRef={safeAreaRef}
|
||||
isScaled={isScaled}
|
||||
isFlyingAway={isFlyingAway}
|
||||
isActive={i === imageIndex}
|
||||
dismissSwipeTranslateY={dismissSwipeTranslateY}
|
||||
openProgress={openProgress}
|
||||
thumbRects={thumbRects}
|
||||
imageIndex={i}
|
||||
/>
|
||||
</View>
|
||||
))}
|
||||
</PagerView>
|
||||
<View style={styles.controls} pointerEvents="box-none">
|
||||
<Animated.View
|
||||
style={animatedHeaderStyle}
|
||||
pointerEvents="box-none"
|
||||
renderToHardwareTextureAndroid>
|
||||
<Header
|
||||
onRequestClose={handleRequestClose}
|
||||
onPressShare={() => onPressShare(images[imageIndex].uri)}
|
||||
onPressSave={() => onPressSave(images[imageIndex].uri)}
|
||||
imageCount={images.length}
|
||||
activeIndex={imageIndex}
|
||||
/>
|
||||
</Animated.View>
|
||||
<Animated.View
|
||||
style={animatedFooterStyle}
|
||||
pointerEvents="box-none"
|
||||
renderToHardwareTextureAndroid={!isAltExpanded}>
|
||||
<Footer
|
||||
altText={images[imageIndex].alt}
|
||||
isAltExpanded={isAltExpanded}
|
||||
onToggleAltExpanded={() => setIsAltExpanded(e => !e)}
|
||||
/>
|
||||
</Animated.View>
|
||||
</View>
|
||||
</Animated.View>
|
||||
)
|
||||
}
|
||||
|
||||
function LightboxImage({
|
||||
imageSrc,
|
||||
onTap,
|
||||
onZoom,
|
||||
onRequestClose,
|
||||
isScrollViewBeingDragged,
|
||||
isScaled,
|
||||
isFlyingAway,
|
||||
isActive,
|
||||
showControls,
|
||||
safeAreaRef,
|
||||
openProgress,
|
||||
dismissSwipeTranslateY,
|
||||
thumbRects,
|
||||
imageIndex,
|
||||
}: {
|
||||
imageSrc: ImageSource
|
||||
onRequestClose: () => void
|
||||
onTap: () => void
|
||||
onZoom: (scaled: boolean) => void
|
||||
isScrollViewBeingDragged: boolean
|
||||
isScaled: boolean
|
||||
isActive: boolean
|
||||
isFlyingAway: SharedValue<boolean>
|
||||
showControls: boolean
|
||||
safeAreaRef: AnimatedRef<View>
|
||||
openProgress: SharedValue<number>
|
||||
dismissSwipeTranslateY: SharedValue<number>
|
||||
thumbRects: SharedValue<Record<number, MeasuredDimensions | null>>
|
||||
imageIndex: number
|
||||
}) {
|
||||
const [fetchedDims, setFetchedDims] = useState<Dimensions | null>(null)
|
||||
const dims = fetchedDims ?? imageSrc.dimensions ?? imageSrc.thumbDimensions
|
||||
let imageAspect: number | undefined
|
||||
if (dims) {
|
||||
imageAspect = dims.width / dims.height
|
||||
if (Number.isNaN(imageAspect)) {
|
||||
imageAspect = undefined
|
||||
}
|
||||
}
|
||||
|
||||
const {
|
||||
width: widthDelayedForJSThreadOnly,
|
||||
height: heightDelayedForJSThreadOnly,
|
||||
} = useWindowDimensions()
|
||||
const measureSafeArea = useCallback(() => {
|
||||
'worklet'
|
||||
let safeArea: Rect | null = measure(safeAreaRef)
|
||||
if (!safeArea) {
|
||||
if (_WORKLET) {
|
||||
console.error('Expected to always be able to measure safe area.')
|
||||
}
|
||||
safeArea = {
|
||||
x: 0,
|
||||
y: 0,
|
||||
width: widthDelayedForJSThreadOnly,
|
||||
height: heightDelayedForJSThreadOnly,
|
||||
}
|
||||
}
|
||||
return safeArea
|
||||
}, [safeAreaRef, heightDelayedForJSThreadOnly, widthDelayedForJSThreadOnly])
|
||||
|
||||
const {thumbRect: thumbRectJS, thumbBorderRadius} = imageSrc
|
||||
const transforms = useDerivedValue<LightboxTransforms>(() => {
|
||||
'worklet'
|
||||
const safeArea = measureSafeArea()
|
||||
const openProgressValue = openProgress.get()
|
||||
const dismissTranslateY =
|
||||
isActive && openProgressValue === 1 ? dismissSwipeTranslateY.get() : 0
|
||||
|
||||
if (openProgressValue === 0 && isFlyingAway.get()) {
|
||||
return {
|
||||
isHidden: true,
|
||||
isResting: false,
|
||||
borderRadius: 0,
|
||||
scaleAndMoveTransform: [],
|
||||
cropFrameTransform: [],
|
||||
cropContentTransform: [],
|
||||
}
|
||||
}
|
||||
|
||||
if (isActive && imageAspect && openProgressValue < 1) {
|
||||
let thumbRect
|
||||
if (_WORKLET) {
|
||||
thumbRect = thumbRects.get()[imageIndex]
|
||||
} else {
|
||||
thumbRect = thumbRectJS
|
||||
}
|
||||
if (thumbRect) {
|
||||
return interpolateTransform(
|
||||
openProgressValue,
|
||||
thumbRect,
|
||||
safeArea,
|
||||
imageAspect,
|
||||
thumbBorderRadius,
|
||||
)
|
||||
}
|
||||
}
|
||||
return {
|
||||
isHidden: false,
|
||||
isResting: dismissTranslateY === 0,
|
||||
borderRadius: 0,
|
||||
scaleAndMoveTransform: [{translateY: dismissTranslateY}],
|
||||
cropFrameTransform: [],
|
||||
cropContentTransform: [],
|
||||
}
|
||||
})
|
||||
|
||||
const dismissSwipePan = Gesture.Pan()
|
||||
.enabled(isActive && !isScaled)
|
||||
.activeOffsetY([-10, 10])
|
||||
.failOffsetX([-10, 10])
|
||||
.maxPointers(1)
|
||||
.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
|
||||
}
|
||||
})
|
||||
}
|
||||
}
|
||||
@@ -0,0 +1,98 @@
|
||||
import {type Position} from '../types'
|
||||
|
||||
export type TransformMatrix = [
|
||||
number,
|
||||
number,
|
||||
number,
|
||||
number,
|
||||
number,
|
||||
number,
|
||||
number,
|
||||
number,
|
||||
number,
|
||||
]
|
||||
|
||||
// These are affine transforms. See explanation of every cell here:
|
||||
// https://en.wikipedia.org/wiki/Transformation_matrix#/media/File:2D_affine_transformation_matrix.svg
|
||||
|
||||
export function createTransform(): TransformMatrix {
|
||||
'worklet'
|
||||
return [1, 0, 0, 0, 1, 0, 0, 0, 1]
|
||||
}
|
||||
|
||||
export function applyRounding(t: TransformMatrix) {
|
||||
'worklet'
|
||||
t[2] = Math.round(t[2])
|
||||
t[5] = Math.round(t[5])
|
||||
// For example: 0.985, 0.99, 0.995, then 1:
|
||||
t[0] = Math.round(t[0] * 200) / 200
|
||||
t[4] = Math.round(t[0] * 200) / 200
|
||||
}
|
||||
|
||||
// We're using a limited subset (always scaling and translating while keeping aspect ratio) so
|
||||
// we can assume the transform doesn't encode have skew, rotation, or non-uniform stretching.
|
||||
|
||||
// All write operations are applied in-place to avoid unnecessary allocations.
|
||||
|
||||
export function readTransform(t: TransformMatrix): [number, number, number] {
|
||||
'worklet'
|
||||
const scale = t[0]
|
||||
const translateX = t[2]
|
||||
const translateY = t[5]
|
||||
return [translateX, translateY, scale]
|
||||
}
|
||||
|
||||
export function prependTranslate(t: TransformMatrix, x: number, y: number) {
|
||||
'worklet'
|
||||
t[2] += t[0] * x + t[1] * y
|
||||
t[5] += t[3] * x + t[4] * y
|
||||
}
|
||||
|
||||
export function prependScale(t: TransformMatrix, value: number) {
|
||||
'worklet'
|
||||
t[0] *= value
|
||||
t[1] *= value
|
||||
t[3] *= value
|
||||
t[4] *= value
|
||||
}
|
||||
|
||||
export function prependTransform(ta: TransformMatrix, tb: TransformMatrix) {
|
||||
'worklet'
|
||||
// In-place matrix multiplication.
|
||||
const a00 = ta[0],
|
||||
a01 = ta[1],
|
||||
a02 = ta[2]
|
||||
const a10 = ta[3],
|
||||
a11 = ta[4],
|
||||
a12 = ta[5]
|
||||
const a20 = ta[6],
|
||||
a21 = ta[7],
|
||||
a22 = ta[8]
|
||||
ta[0] = a00 * tb[0] + a01 * tb[3] + a02 * tb[6]
|
||||
ta[1] = a00 * tb[1] + a01 * tb[4] + a02 * tb[7]
|
||||
ta[2] = a00 * tb[2] + a01 * tb[5] + a02 * tb[8]
|
||||
ta[3] = a10 * tb[0] + a11 * tb[3] + a12 * tb[6]
|
||||
ta[4] = a10 * tb[1] + a11 * tb[4] + a12 * tb[7]
|
||||
ta[5] = a10 * tb[2] + a11 * tb[5] + a12 * tb[8]
|
||||
ta[6] = a20 * tb[0] + a21 * tb[3] + a22 * tb[6]
|
||||
ta[7] = a20 * tb[1] + a21 * tb[4] + a22 * tb[7]
|
||||
ta[8] = a20 * tb[2] + a21 * tb[5] + a22 * tb[8]
|
||||
}
|
||||
|
||||
export function prependPan(t: TransformMatrix, translation: Position) {
|
||||
'worklet'
|
||||
prependTranslate(t, translation.x, translation.y)
|
||||
}
|
||||
|
||||
export function prependPinch(
|
||||
t: TransformMatrix,
|
||||
scale: number,
|
||||
origin: Position,
|
||||
translation: Position,
|
||||
) {
|
||||
'worklet'
|
||||
prependTranslate(t, translation.x, translation.y)
|
||||
prependTranslate(t, origin.x, origin.y)
|
||||
prependScale(t, scale)
|
||||
prependTranslate(t, -origin.x, -origin.y)
|
||||
}
|
||||
Reference in New Issue
Block a user