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feat(native): implement native EventTarget methods #3252

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feat(native): implement native EventTarget methods #3252

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102 changes: 86 additions & 16 deletions packages/fiber/src/native/Canvas.tsx
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Original file line number Diff line number Diff line change
@@ -1,6 +1,16 @@
import * as React from 'react'
import * as THREE from 'three'
import { View, ViewProps, ViewStyle, LayoutChangeEvent, StyleSheet, PixelRatio } from 'react-native'
import {
View,
type ViewProps,
type ViewStyle,
type GestureResponderHandlers,
type GestureResponderEvent,
PanResponder,
type LayoutChangeEvent,
StyleSheet,
PixelRatio,
} from 'react-native'
import { ExpoWebGLRenderingContext, GLView } from 'expo-gl'
import { useContextBridge, FiberProvider } from 'its-fine'
import { SetBlock, Block, ErrorBoundary, useMutableCallback } from '../core/utils'
Expand Down Expand Up @@ -51,7 +61,7 @@ const CanvasImpl = /*#__PURE__*/ React.forwardRef<View, Props>(

const [{ width, height, top, left }, setSize] = React.useState<Size>({ width: 0, height: 0, top: 0, left: 0 })
const [canvas, setCanvas] = React.useState<HTMLCanvasElement | null>(null)
const [bind, setBind] = React.useState<any>()
const [bind, setBind] = React.useState<GestureResponderHandlers>()
React.useImperativeHandle(forwardedRef, () => viewRef.current)

const handlePointerMissed = useMutableCallback(onPointerMissed)
Expand All @@ -76,21 +86,79 @@ const CanvasImpl = /*#__PURE__*/ React.forwardRef<View, Props>(
// Called on context create or swap
// https://github.com/pmndrs/react-three-fiber/pull/2297
const onContextCreate = React.useCallback((context: ExpoWebGLRenderingContext) => {
const canvasShim = {
const listeners = new Map<string, EventListener[]>()

const canvas = {
width: context.drawingBufferWidth,
height: context.drawingBufferHeight,
style: {},
addEventListener: (() => {}) as any,
removeEventListener: (() => {}) as any,
clientWidth: context.drawingBufferWidth,
clientHeight: context.drawingBufferHeight,
getContext: ((_: any, { antialias = false }) => {
getContext: (_: any, { antialias = false }) => {
setAntialias(antialias)
return context
}) as any,
} as HTMLCanvasElement
},
addEventListener(type: string, listener: EventListener) {
let callbacks = listeners.get(type)
if (!callbacks) {
callbacks = []
listeners.set(type, callbacks)
}

callbacks.push(listener)
},
removeEventListener(type: string, listener: EventListener) {
const callbacks = listeners.get(type)
if (callbacks) {
const index = callbacks.indexOf(listener)
if (index !== -1) callbacks.splice(index, 1)
}
},
dispatchEvent(event: Event) {
Object.assign(event, { target: this })

const callbacks = listeners.get(event.type)
if (callbacks) {
for (const callback of callbacks) {
callback(event)
}
}
},
} as unknown as HTMLCanvasElement

root.current = createRoot<HTMLCanvasElement>(canvasShim)
setCanvas(canvasShim)
root.current = createRoot<HTMLCanvasElement>(canvas)
setCanvas(canvas)

function handleTouch(gestureEvent: GestureResponderEvent, type: string): true {
gestureEvent.persist()

canvas.dispatchEvent(
Object.assign(gestureEvent.nativeEvent, {
type,
offsetX: gestureEvent.nativeEvent.locationX,
offsetY: gestureEvent.nativeEvent.locationY,
}) as unknown as Event,
)

return true
}

const responder = PanResponder.create({
onStartShouldSetPanResponder: () => true,
onMoveShouldSetPanResponder: () => true,
onMoveShouldSetPanResponderCapture: () => true,
onPanResponderTerminationRequest: () => true,
onStartShouldSetPanResponderCapture: (e) => handleTouch(e, 'onPointerCapture'),
onPanResponderStart: (e) => handleTouch(e, 'onPointerDown'),
onPanResponderMove: (e) => handleTouch(e, 'onPointerMove'),
onPanResponderEnd: (e, state) => {
handleTouch(e, 'onPointerUp')
if (Math.hypot(state.dx, state.dy) < 20) handleTouch(e, 'onClick')
},
onPanResponderRelease: (e) => handleTouch(e, 'onPointerLeave'),
onPanResponderTerminate: (e) => handleTouch(e, 'onLostPointerCapture'),
onPanResponderReject: (e) => handleTouch(e, 'onLostPointerCapture'),
})
setBind(responder.panHandlers)
}, [])

if (root.current && width > 0 && height > 0) {
Expand All @@ -115,9 +183,6 @@ const CanvasImpl = /*#__PURE__*/ React.forwardRef<View, Props>(
onPointerMissed: (...args) => handlePointerMissed.current?.(...args),
// Overwrite onCreated to apply RN bindings
onCreated: (state: RootState) => {
// Bind events after creation
setBind(state.events.handlers)

// Bind render to RN bridge
const context = state.gl.getContext() as ExpoWebGLRenderingContext
const renderFrame = state.gl.render.bind(state.gl)
Expand Down Expand Up @@ -145,9 +210,14 @@ const CanvasImpl = /*#__PURE__*/ React.forwardRef<View, Props>(
}, [canvas])

return (
<View {...props} ref={viewRef} onLayout={onLayout} style={{ flex: 1, ...style }} {...bind}>
<View {...props} ref={viewRef} onLayout={onLayout} style={{ flex: 1, ...style }}>
Comment on lines -148 to +213
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This should allow props to be spread from libraries like https://github.com/TiagoCavalcante/r3f-native-orbitcontrols which also use responder props.

{width > 0 && (
<GLView msaaSamples={antialias ? 4 : 0} onContextCreate={onContextCreate} style={StyleSheet.absoluteFill} />
<GLView
{...bind}
msaaSamples={antialias ? 4 : 0}
onContextCreate={onContextCreate}
style={StyleSheet.absoluteFill}
/>
)}
</View>
)
Expand Down