1 line
29 KiB
Plaintext
1 line
29 KiB
Plaintext
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eslint-disable eslint-comments/no-unlimited-disable */\n/* eslint-disable */\nimport Hammer from '@egjs/hammerjs';\nimport { findNodeHandle } from 'react-native';\n\nimport { State } from '../State';\nimport { EventMap } from './constants';\nimport * as NodeManager from './NodeManager';\n\n// TODO(TS) Replace with HammerInput if https://github.com/DefinitelyTyped/DefinitelyTyped/pull/50438/files is merged\nexport type HammerInputExt = Omit<HammerInput, 'destroy' | 'handler' | 'init'>;\n\nexport type Config = Partial<{\n enabled: boolean;\n minPointers: number;\n maxPointers: number;\n minDist: number;\n minDistSq: number;\n minVelocity: number;\n minVelocitySq: number;\n maxDist: number;\n maxDistSq: number;\n failOffsetXStart: number;\n failOffsetYStart: number;\n failOffsetXEnd: number;\n failOffsetYEnd: number;\n activeOffsetXStart: number;\n activeOffsetXEnd: number;\n activeOffsetYStart: number;\n activeOffsetYEnd: number;\n waitFor: any[] | null;\n}>;\n\ntype NativeEvent = ReturnType<GestureHandler['transformEventData']>;\n\nlet gestureInstances = 0;\n\nabstract class GestureHandler {\n public handlerTag: any;\n public isGestureRunning = false;\n public view: number | null = null;\n protected hasCustomActivationCriteria: boolean;\n protected hasGestureFailed = false;\n protected hammer: HammerManager | null = null;\n protected initialRotation: number | null = null;\n protected __initialX: any;\n protected __initialY: any;\n protected config: Config = {};\n protected previousState: State = State.UNDETERMINED;\n private pendingGestures: Record<string, this> = {};\n private oldState: State = State.UNDETERMINED;\n private lastSentState: State | null = null;\n private gestureInstance: number;\n private _stillWaiting: any;\n private propsRef: any;\n private ref: any;\n\n abstract get name(): string;\n\n get id() {\n return `${this.name}${this.gestureInstance}`;\n }\n\n get isDiscrete() {\n return false;\n }\n\n get shouldEnableGestureOnSetup(): boolean {\n throw new Error('Must override GestureHandler.shouldEnableGestureOnSetup');\n }\n\n constructor() {\n this.gestureInstance = gestureInstances++;\n this.hasCustomActivationCriteria = false;\n }\n\n getConfig() {\n return this.config;\n }\n\n onWaitingEnded(_gesture: this) {}\n\n removePendingGesture(id: string) {\n delete this.pendingGestures[id];\n }\n\n addPendingGesture(gesture: this) {\n this.pendingGestures[gesture.id] = gesture;\n }\n\n isGestureEnabledForEvent(\n _config: any,\n _recognizer: any,\n _event: any\n ): { failed?: boolean; success?: boolean } {\n return { success: true };\n }\n\n get NativeGestureClass(): RecognizerStatic {\n throw new Error('Must override GestureHandler.NativeGestureClass');\n }\n\n updateHasCustomActivationCriteria(_config: Config) {\n return true;\n }\n\n clearSelfAsPending = () => {\n if (Array.isArray(this.config.waitFor)) {\n for (const gesture of this.config.waitFor) {\n gesture.removePendingGesture(this.id);\n }\n }\n };\n\n updateGestureConfig({ enabled = true, ...props }) {\n this.clearSelfAsPending();\n\n this.config = ensureConfig({ enabled, ...props });\n this.hasCustomActivationCriteria = this.updateHasCustomActivationCriteria(\n this.config\n );\n if (Array.isArray(this.config.waitFor)) {\n for (const gesture of this.config.waitFor) {\n gesture.addPendingGesture(this);\n }\n }\n\n if (this.hammer) {\n this.sync();\n }\n return this.config;\n }\n\n destroy = () => {\n this.clearSelfAsPending();\n\n if (this.hammer) {\n this.hammer.stop(false);\n this.hammer.destroy();\n }\n this.hammer = null;\n };\n\n isPointInView = ({ x, y }: { x: number; y: number }) => {\n // @ts-ignore FIXME(TS)\n const rect = this.view!.getBoundingClientRect();\n const pointerInside =\n x >= rect.left && x <= rect.right && y >= rect.top && y <= rect.bottom;\n return pointerInside;\n };\n\n getState(type: keyof typeof EventMap): State {\n // @ts-ignore TODO(TS) check if this is needed\n if (type == 0) {\n return 0;\n }\n return EventMap[type];\n }\n\n transformEventData(event: HammerInputExt) {\n const { eventType, maxPointers: numberOfPointers } = event;\n // const direction = DirectionMap[ev.direction];\n const changedTouch = event.changedPointers[0];\n const pointerInside = this.isPointInView({\n x: changedTouch.clientX,\n y: changedTouch.clientY,\n });\n\n // TODO(TS) Remove cast after https://github.com/DefinitelyTyped/DefinitelyTyped/pull/50966 is merged.\n const state = this.getState(eventType as 1 | 2 | 4 | 8);\n if (state !== this.previousState) {\n this.oldState = this.previousState;\n this.previousState = state;\n }\n\n return {\n nativeEvent: {\n numberOfPointers,\n state,\n pointerInside,\n ...this.transformNativeEvent(event),\n // onHandlerStateChange only\n handlerTag: this.handlerTag,\n target: this.ref,\n oldState: this.oldState,\n },\n timeStamp: Date.now(),\n };\n }\n\n transformNativeEvent(_event: HammerInputExt) {\n return {};\n }\n\n sendEvent = (nativeEvent: HammerInputExt) => {\n const {\n onGestureHandlerEvent,\n onGestureHandlerStateChange,\n } = this.propsRef.current;\n\n const event = this.transformEventData(nativeEvent);\n\n invokeNullableMethod(onGestureHandlerEvent, event);\n if (this.lastSentState !== event.nativeEvent.state) {\n this.lastSentState = event.nativeEvent.state as State;\n invokeNullableMethod(onGestureHandlerStateChange, event);\n }\n };\n\n cancelPendingGestures(event: HammerInputExt) {\n for (const gesture of Object.values(this.pendingGestures)) {\n if (gesture && gesture.isGestureRunning) {\n gesture.hasGestureFailed = true;\n gesture.cancelEvent(event);\n }\n }\n }\n\n notifyPendingGestures() {\n for (const gesture of Object.values(this.pendingGestures)) {\n if (gesture) {\n gesture.onWaitingEnded(this);\n }\n }\n }\n\n // FIXME event is undefined in runtime when firstly invoked (see Draggable example), check other functions taking event as input\n onGestureEnded(event: HammerInputExt) {\n this.isGestureRunning = false;\n this.cancelPendingGestures(event);\n }\n\n forceInvalidate(event: HammerInputExt) {\n if (this.isGestureRunning) {\n this.hasGestureFailed = true;\n this.cancelEvent(event);\n }\n }\n\n cancelEvent(event: HammerInputExt) {\n this.notifyPendingGestures();\n this.sendEvent({\n ...event,\n eventType: Hammer.INPUT_CANCEL,\n isFinal: true,\n });\n this.onGestureEnded(event);\n }\n\n onRawEvent({ isFirst }: HammerInputExt) {\n if (isFirst) {\n this.hasGestureFailed = false;\n }\n }\n\n setView(ref: Parameters<typeof findNodeHandle>['0'], propsRef: any) {\n if (ref == null) {\n this.destroy();\n this.view = null;\n return;\n }\n\n this.propsRef = propsRef;\n this.ref = ref;\n\n this.view = findNodeHandle(ref);\n this.hammer = new Hammer.Manager(this.view as any);\n\n this.oldState = State.UNDETERMINED;\n this.previousState = State.UNDETERMINED;\n this.lastSentState = null;\n\n const { NativeGestureClass } = this;\n // @ts-ignore TODO(TS)\n const gesture = new NativeGestureClass(this.getHammerConfig());\n this.hammer.add(gesture);\n\n this.hammer.on('hammer.input', (ev: HammerInput) => {\n if (!this.config.enabled) {\n this.hasGestureFailed = false;\n this.isGestureRunning = false;\n return;\n }\n\n this.onRawEvent((ev as unknown) as HammerInputExt);\n\n // TODO: Bacon: Check against something other than null\n // The isFirst value is not called when the first rotation is calculated.\n if (this.initialRotation === null && ev.rotation !== 0) {\n this.initialRotation = ev.rotation;\n }\n if (ev.isFinal) {\n // in favor of a willFail otherwise the last frame of the gesture will be captured.\n setTimeout(() => {\n this.initialRotation = null;\n this.hasGestureFailed = false;\n });\n }\n });\n\n this.setupEvents();\n this.sync();\n }\n\n setupEvents() {\n // TODO(TS) Hammer types aren't exactly that what we get in runtime\n if (!this.isDiscrete) {\n this.hammer!.on(`${this.name}start`, (event: HammerInput) =>\n this.onStart((event as unknown) as HammerInputExt)\n );\n this.hammer!.on(\n `${this.name}end ${this.name}cancel`,\n (event: HammerInput) => {\n this.onGestureEnded((event as unknown) as HammerInputExt);\n }\n );\n }\n this.hammer!.on(this.name, (ev: HammerInput) =>\n this.onGestureActivated((ev as unknown) as HammerInputExt)\n ); // TODO(TS) remove cast after https://github.com/DefinitelyTyped/DefinitelyTyped/pull/50438 is merged\n }\n\n onStart({ deltaX, deltaY, rotation }: HammerInputExt) {\n // Reset the state for the next gesture\n this.oldState = State.UNDETERMINED;\n this.previousState = State.UNDETERMINED;\n this.lastSentState = null;\n\n this.isGestureRunning = true;\n this.__initialX = deltaX;\n this.__initialY = deltaY;\n this.initialRotation = rotation;\n }\n\n onGestureActivated(ev: HammerInputExt) {\n this.sendEvent(ev);\n }\n\n onSuccess() {}\n\n _getPendingGestures() {\n if (Array.isArray(this.config.waitFor) && this.config.waitFor.length) {\n // Get the list of gestures that this gesture is still waiting for.\n // Use `=== false` in case a ref that isn't a gesture handler is used.\n const stillWaiting = this.config.waitFor.filter(\n ({ hasGestureFailed }) => hasGestureFailed === false\n );\n return stillWaiting;\n }\n return [];\n }\n\n getHammerConfig() {\n const pointers =\n this.config.minPointers === this.config.maxPointers\n ? this.config.minPointers\n : 0;\n return {\n pointers,\n };\n }\n\n sync = () => {\n const gesture = this.hammer!.get(this.name);\n if (!gesture) return;\n\n const enable = (recognizer: any, inputData: any) => {\n if (!this.config.enabled) {\n this.isGestureRunning = false;\n this.hasGestureFailed = false;\n return false;\n }\n\n // Prevent events before the system is ready.\n if (\n !inputData ||\n !recognizer.options ||\n typeof inputData.maxPointers === 'undefined'\n ) {\n return this.shouldEnableGestureOnSetup;\n }\n\n if (this.hasGestureFailed) {\n return false;\n }\n\n if (!this.isDiscrete) {\n if (this.isGestureRunning) {\n return true;\n }\n // The built-in hammer.js \"waitFor\" doesn't work across multiple views.\n // Only process if there are views to wait for.\n this._stillWaiting = this._getPendingGestures();\n // This gesture should continue waiting.\n if (this._stillWaiting.length) {\n // Check to see if one of the gestures you're waiting for has started.\n // If it has then the gesture should fail.\n for (const gesture of this._stillWaiting) {\n // When the target gesture has started, this gesture must force fail.\n if (!gesture.isDiscrete && gesture.isGestureRunning) {\n this.hasGestureFailed = true;\n this.isGestureRunning = false;\n return false;\n }\n }\n // This gesture shouldn't start until the others have finished.\n return false;\n }\n }\n\n // Use default behaviour\n if (!this.hasCustomActivationCriteria) {\n return true;\n }\n\n const deltaRotation =\n this.initialRotation == null\n ? 0\n : inputData.rotation - this.initialRotation;\n // @ts-ignore FIXME(TS)\n const { success, failed } = this.isGestureEnabledForEvent(\n this.getConfig(),\n recognizer,\n {\n ...inputData,\n deltaRotation,\n }\n );\n\n if (failed) {\n this.simulateCancelEvent(inputData);\n this.hasGestureFailed = true;\n }\n return success;\n };\n\n const params = this.getHammerConfig();\n // @ts-ignore FIXME(TS)\n gesture.set({ ...params, enable });\n };\n\n simulateCancelEvent(_inputData: any) {}\n}\n\n// TODO(TS) investigate this method\n// Used for sending data to a callback or AnimatedEvent\nfunction invokeNullableMethod(\n method:\n | ((event: NativeEvent) => void)\n | { __getHandler: () => (event: NativeEvent) => void }\n | { __nodeConfig: { argMapping: any } },\n event: NativeEvent\n) {\n if (method) {\n if (typeof method === 'function') {\n method(event);\n } else {\n // For use with reanimated's AnimatedEvent\n if (\n '__getHandler' in method &&\n typeof method.__getHandler === 'function'\n ) {\n const handler = method.__getHandler();\n invokeNullableMethod(handler, event);\n } else {\n if ('__nodeConfig' in method) {\n const { argMapping } = method.__nodeConfig;\n if (Array.isArray(argMapping)) {\n for (const index in argMapping) {\n const [key, value] = argMapping[index];\n if (key in event.nativeEvent) {\n // @ts-ignore fix method type\n const nativeValue = event.nativeEvent[key];\n if (value && value.setValue) {\n // Reanimated API\n value.setValue(nativeValue);\n } else {\n // RN Animated API\n method.__nodeConfig.argMapping[index] = [key, nativeValue];\n }\n }\n }\n }\n }\n }\n }\n }\n}\n\n// Validate the props\nfunction ensureConfig(config: Config): Required<Config> {\n const props = { ...config };\n\n // TODO(TS) We use ! to assert that if property is present then value is not empty (null, undefined)\n if ('minDist' in config) {\n props.minDist = config.minDist;\n props.minDistSq = props.minDist! * props.minDist!;\n }\n if ('minVelocity' in config) {\n props.minVelocity = config.minVelocity;\n props.minVelocitySq = props.minVelocity! * props.minVelocity!;\n }\n if ('maxDist' in config) {\n props.maxDist = config.maxDist;\n props.maxDistSq = config.maxDist! * config.maxDist!;\n }\n if ('waitFor' in config) {\n props.waitFor = asArray(config.waitFor)\n .map(({ handlerTag }: { handlerTag: number }) =>\n NodeManager.getHandler(handlerTag)\n )\n .filter((v) => v);\n } else {\n props.waitFor = null;\n }\n\n const configProps = [\n 'minPointers',\n 'maxPointers',\n 'minDist',\n 'maxDist',\n 'maxDistSq',\n 'minVelocitySq',\n 'minDistSq',\n 'minVelocity',\n 'failOffsetXStart',\n 'failOffsetYStart',\n 'failOffsetXEnd',\n 'failOffsetYEnd',\n 'activeOffsetXStart',\n 'activeOffsetXEnd',\n 'activeOffsetYStart',\n 'activeOffsetYEnd',\n ] as const;\n configProps.forEach((prop: typeof configProps[number]) => {\n if (typeof props[prop] === 'undefined') {\n props[prop] = Number.NaN;\n }\n });\n return props as Required<Config>; // TODO(TS) how to convince TS that props are filled?\n}\n\nfunction asArray<T>(value: T | T[]) {\n // TODO(TS) use config.waitFor type\n return value == null ? [] : Array.isArray(value) ? value : [value];\n}\n\nexport default GestureHandler;\n"]} |