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{ State } from '../../State';\nimport { DEFAULT_TOUCH_SLOP } from '../constants';\nimport { AdaptedEvent, Config } from '../interfaces';\n\nimport GestureHandler from './GestureHandler';\n\nconst DEFAULT_MIN_POINTERS = 1;\nconst DEFAULT_MAX_POINTERS = 10;\nconst DEFAULT_MIN_DIST_SQ = DEFAULT_TOUCH_SLOP * DEFAULT_TOUCH_SLOP;\n\nexport default class PanGestureHandler extends GestureHandler {\n  private readonly customActivationProperties: string[] = [\n    'activeOffsetXStart',\n    'activeOffsetXEnd',\n    'failOffsetXStart',\n    'failOffsetXEnd',\n    'activeOffsetYStart',\n    'activeOffsetYEnd',\n    'failOffsetYStart',\n    'failOffsetYEnd',\n    'minVelocityX',\n    'minVelocityY',\n  ];\n\n  public velocityX = 0;\n  public velocityY = 0;\n\n  private minDistSq = DEFAULT_MIN_DIST_SQ;\n\n  private activeOffsetXStart = -Number.MAX_SAFE_INTEGER;\n  private activeOffsetXEnd = Number.MIN_SAFE_INTEGER;\n  private failOffsetXStart = Number.MIN_SAFE_INTEGER;\n  private failOffsetXEnd = Number.MAX_SAFE_INTEGER;\n\n  private activeOffsetYStart = Number.MAX_SAFE_INTEGER;\n  private activeOffsetYEnd = Number.MIN_SAFE_INTEGER;\n  private failOffsetYStart = Number.MIN_SAFE_INTEGER;\n  private failOffsetYEnd = Number.MAX_SAFE_INTEGER;\n\n  private minVelocityX = Number.MAX_SAFE_INTEGER;\n  private minVelocityY = Number.MAX_SAFE_INTEGER;\n  private minVelocitySq = Number.MAX_SAFE_INTEGER;\n\n  private minPointers = DEFAULT_MIN_POINTERS;\n  private maxPointers = DEFAULT_MAX_POINTERS;\n\n  private startX = 0;\n  private startY = 0;\n  private offsetX = 0;\n  private offsetY = 0;\n  private lastX = 0;\n  private lastY = 0;\n\n  private activateAfterLongPress = 0;\n  private activationTimeout = 0;\n\n  public init(ref: number, propsRef: React.RefObject<unknown>): void {\n    super.init(ref, propsRef);\n  }\n\n  public updateGestureConfig({ enabled = true, ...props }: Config): void {\n    this.resetConfig();\n\n    super.updateGestureConfig({ enabled: enabled, ...props });\n    this.checkCustomActivationCriteria(this.customActivationProperties);\n\n    if (this.config.minDist !== undefined) {\n      this.minDistSq = this.config.minDist * this.config.minDist;\n    } else if (this.hasCustomActivationCriteria) {\n      this.minDistSq = Number.MAX_SAFE_INTEGER;\n    }\n\n    if (this.config.minPointers !== undefined) {\n      this.minPointers = this.config.minPointers;\n    }\n\n    if (this.config.maxPointers !== undefined) {\n      this.maxPointers = this.config.maxPointers;\n    }\n\n    if (this.config.minVelocity !== undefined) {\n      this.minVelocityX = this.config.minVelocity;\n      this.minVelocityY = this.config.minVelocity;\n    }\n\n    if (this.config.minVelocityX !== undefined) {\n      this.minVelocityX = this.config.minVelocityX;\n    }\n\n    if (this.config.minVelocityY !== undefined) {\n      this.minVelocityY = this.config.minVelocityY;\n    }\n\n    if (this.config.activateAfterLongPress !== undefined) {\n      this.activateAfterLongPress = this.config.activateAfterLongPress;\n    }\n\n    if (this.config.activeOffsetXStart !== undefined) {\n      this.activeOffsetXStart = this.config.activeOffsetXStart;\n\n      if (this.config.activeOffsetXEnd === undefined) {\n        this.activeOffsetXEnd = Number.MAX_SAFE_INTEGER;\n      }\n    }\n\n    if (this.config.activeOffsetXEnd !== undefined) {\n      this.activeOffsetXEnd = this.config.activeOffsetXEnd;\n\n      if (this.config.activeOffsetXStart === undefined) {\n        this.activeOffsetXStart = Number.MIN_SAFE_INTEGER;\n      }\n    }\n\n    if (this.config.failOffsetXStart !== undefined) {\n      this.failOffsetXStart = this.config.failOffsetXStart;\n\n      if (this.config.failOffsetXEnd === undefined) {\n        this.failOffsetXEnd = Number.MAX_SAFE_INTEGER;\n      }\n    }\n\n    if (this.config.failOffsetXEnd !== undefined) {\n      this.failOffsetXEnd = this.config.failOffsetXEnd;\n\n      if (this.config.failOffsetXStart === undefined) {\n        this.failOffsetXStart = Number.MIN_SAFE_INTEGER;\n      }\n    }\n\n    if (this.config.activeOffsetYStart !== undefined) {\n      this.activeOffsetYStart = this.config.activeOffsetYStart;\n\n      if (this.config.activeOffsetYEnd === undefined) {\n        this.activeOffsetYEnd = Number.MAX_SAFE_INTEGER;\n      }\n    }\n\n    if (this.config.activeOffsetYEnd !== undefined) {\n      this.activeOffsetYEnd = this.config.activeOffsetYEnd;\n\n      if (this.config.activeOffsetYStart === undefined) {\n        this.activeOffsetYStart = Number.MIN_SAFE_INTEGER;\n      }\n    }\n\n    if (this.config.failOffsetYStart !== undefined) {\n      this.failOffsetYStart = this.config.failOffsetYStart;\n\n      if (this.config.failOffsetYEnd === undefined) {\n        this.failOffsetYEnd = Number.MAX_SAFE_INTEGER;\n      }\n    }\n\n    if (this.config.failOffsetYEnd !== undefined) {\n      this.failOffsetYEnd = this.config.failOffsetYEnd;\n\n      if (this.config.failOffsetYStart === undefined) {\n        this.failOffsetYStart = Number.MIN_SAFE_INTEGER;\n      }\n    }\n  }\n\n  protected resetConfig(): void {\n    super.resetConfig();\n\n    this.activeOffsetXStart = -Number.MAX_SAFE_INTEGER;\n    this.activeOffsetXEnd = Number.MIN_SAFE_INTEGER;\n    this.failOffsetXStart = Number.MIN_SAFE_INTEGER;\n    this.failOffsetXEnd = Number.MAX_SAFE_INTEGER;\n\n    this.activeOffsetYStart = Number.MAX_SAFE_INTEGER;\n    this.activeOffsetYEnd = Number.MIN_SAFE_INTEGER;\n    this.failOffsetYStart = Number.MIN_SAFE_INTEGER;\n    this.failOffsetYEnd = Number.MAX_SAFE_INTEGER;\n\n    this.minVelocityX = Number.MAX_SAFE_INTEGER;\n    this.minVelocityY = Number.MAX_SAFE_INTEGER;\n    this.minVelocitySq = Number.MAX_SAFE_INTEGER;\n\n    this.minDistSq = DEFAULT_MIN_DIST_SQ;\n\n    this.minPointers = DEFAULT_MIN_POINTERS;\n    this.maxPointers = DEFAULT_MAX_POINTERS;\n\n    this.activateAfterLongPress = 0;\n  }\n\n  protected transformNativeEvent() {\n    const translationX: number = this.getTranslationX();\n    const translationY: number = this.getTranslationY();\n\n    return {\n      ...super.transformNativeEvent(),\n      translationX: isNaN(translationX) ? 0 : translationX,\n      translationY: isNaN(translationY) ? 0 : translationY,\n      velocityX: this.velocityX,\n      velocityY: this.velocityY,\n    };\n  }\n\n  private getTranslationX(): number {\n    return this.lastX - this.startX + this.offsetX;\n  }\n  private getTranslationY(): number {\n    return this.lastY - this.startY + this.offsetY;\n  }\n\n  private clearActivationTimeout(): void {\n    clearTimeout(this.activationTimeout);\n  }\n\n  //EventsHandling\n  protected onPointerDown(event: AdaptedEvent): void {\n    if (!this.isButtonInConfig(event.button)) {\n      return;\n    }\n\n    this.tracker.addToTracker(event);\n    super.onPointerDown(event);\n\n    this.lastX = this.tracker.getLastAvgX();\n    this.lastY = this.tracker.getLastAvgY();\n\n    this.tryBegin(event);\n    this.checkBegan();\n  }\n\n  protected onPointerAdd(event: AdaptedEvent): void {\n    this.tracker.addToTracker(event);\n    super.onPointerAdd(event);\n    this.tryBegin(event);\n\n    this.offsetX += this.lastX - this.startX;\n    this.offsetY += this.lastY - this.startY;\n\n    this.lastX = this.tracker.getLastAvgX();\n    this.lastY = this.tracker.getLastAvgY();\n\n    this.startX = this.lastX;\n    this.startY = this.lastY;\n\n    if (this.tracker.getTrackedPointersCount() > this.maxPointers) {\n      if (this.currentState === State.ACTIVE) {\n        this.cancel();\n      } else {\n        this.fail();\n      }\n    } else {\n      this.checkBegan();\n    }\n  }\n\n  protected onPointerUp(event: AdaptedEvent): void {\n    super.onPointerUp(event);\n\n    if (this.currentState === State.ACTIVE) {\n      this.lastX = this.tracker.getLastAvgX();\n      this.lastY = this.tracker.getLastAvgY();\n    }\n\n    this.tracker.removeFromTracker(event.pointerId);\n\n    if (this.currentState === State.ACTIVE) {\n      this.end();\n    } else {\n      this.resetProgress();\n      this.fail();\n    }\n  }\n  protected onPointerRemove(event: AdaptedEvent): void {\n    super.onPointerRemove(event);\n    this.tracker.removeFromTracker(event.pointerId);\n\n    this.offsetX += this.lastX - this.startX;\n    this.offsetY += this.lastY - this.startY;\n\n    this.lastX = this.tracker.getLastAvgX();\n    this.lastY = this.tracker.getLastAvgY();\n\n    this.startX = this.lastX;\n    this.startY = this.lastY;\n\n    if (\n      !(\n        this.currentState === State.ACTIVE &&\n        this.tracker.getTrackedPointersCount() < this.minPointers\n      )\n    ) {\n      this.checkBegan();\n    }\n  }\n\n  protected onPointerMove(event: AdaptedEvent): void {\n    this.tracker.track(event);\n\n    this.lastX = this.tracker.getLastAvgX();\n    this.lastY = this.tracker.getLastAvgY();\n    this.velocityX = this.tracker.getVelocityX(event.pointerId);\n    this.velocityY = this.tracker.getVelocityY(event.pointerId);\n\n    this.checkBegan();\n\n    super.onPointerMove(event);\n  }\n\n  protected onPointerOutOfBounds(event: AdaptedEvent): void {\n    if (this.getShouldCancelWhenOutside()) {\n      return;\n    }\n\n    this.tracker.track(event);\n\n    this.lastX = this.tracker.getLastAvgX();\n    this.lastY = this.tracker.getLastAvgY();\n    this.velocityX = this.tracker.getVelocityX(event.pointerId);\n    this.velocityY = this.tracker.getVelocityY(event.pointerId);\n\n    this.checkBegan();\n\n    if (this.currentState === State.ACTIVE) {\n      super.onPointerOutOfBounds(event);\n    }\n  }\n\n  private shouldActivate(): boolean {\n    const dx: number = this.getTranslationX();\n\n    if (\n      this.activeOffsetXStart !== Number.MAX_SAFE_INTEGER &&\n      dx < this.activeOffsetXStart\n    ) {\n      return true;\n    }\n\n    if (\n      this.activeOffsetXEnd !== Number.MIN_SAFE_INTEGER &&\n      dx > this.activeOffsetXEnd\n    ) {\n      return true;\n    }\n\n    const dy: number = this.getTranslationY();\n\n    if (\n      this.activeOffsetYStart !== Number.MAX_SAFE_INTEGER &&\n      dy < this.activeOffsetYStart\n    ) {\n      return true;\n    }\n\n    if (\n      this.activeOffsetYEnd !== Number.MIN_SAFE_INTEGER &&\n      dy > this.activeOffsetYEnd\n    ) {\n      return true;\n    }\n\n    const distanceSq: number = dx * dx + dy * dy;\n\n    if (\n      this.minDistSq !== Number.MAX_SAFE_INTEGER &&\n      distanceSq >= this.minDistSq\n    ) {\n      return true;\n    }\n\n    const vx: number = this.velocityX;\n\n    if (\n      this.minVelocityX !== Number.MAX_SAFE_INTEGER &&\n      ((this.minVelocityX < 0 && vx <= this.minVelocityX) ||\n        (this.minVelocityX >= 0 && this.minVelocityX <= vx))\n    ) {\n      return true;\n    }\n\n    const vy: number = this.velocityY;\n    if (\n      this.minVelocityY !== Number.MAX_SAFE_INTEGER &&\n      ((this.minVelocityY < 0 && vy <= this.minVelocityY) ||\n        (this.minVelocityY >= 0 && this.minVelocityY <= vy))\n    ) {\n      return true;\n    }\n\n    const velocitySq: number = vx * vx + vy * vy;\n\n    return (\n      this.minVelocitySq !== Number.MAX_SAFE_INTEGER &&\n      velocitySq >= this.minVelocitySq\n    );\n  }\n\n  private shouldFail(): boolean {\n    const dx: number = this.getTranslationX();\n    const dy: number = this.getTranslationY();\n    const distanceSq = dx * dx + dy * dy;\n\n    if (this.activateAfterLongPress > 0 && distanceSq > DEFAULT_MIN_DIST_SQ) {\n      this.clearActivationTimeout();\n      return true;\n    }\n\n    if (\n      this.failOffsetXStart !== Number.MIN_SAFE_INTEGER &&\n      dx < this.failOffsetXStart\n    ) {\n      return true;\n    }\n\n    if (\n      this.failOffsetXEnd !== Number.MAX_SAFE_INTEGER &&\n      dx > this.failOffsetXEnd\n    ) {\n      return true;\n    }\n\n    if (\n      this.failOffsetYStart !== Number.MIN_SAFE_INTEGER &&\n      dy < this.failOffsetYStart\n    ) {\n      return true;\n    }\n\n    return (\n      this.failOffsetYEnd !== Number.MAX_SAFE_INTEGER &&\n      dy > this.failOffsetYEnd\n    );\n  }\n\n  private tryBegin(event: AdaptedEvent): void {\n    if (\n      this.currentState === State.UNDETERMINED &&\n      this.tracker.getTrackedPointersCount() >= this.minPointers\n    ) {\n      this.resetProgress();\n      this.offsetX = 0;\n      this.offsetY = 0;\n      this.velocityX = 0;\n      this.velocityY = 0;\n\n      this.begin();\n\n      if (this.activateAfterLongPress > 0) {\n        this.activationTimeout = setTimeout(() => {\n          this.activate();\n        }, this.activateAfterLongPress);\n      }\n    } else {\n      this.velocityX = this.tracker.getVelocityX(event.pointerId);\n      this.velocityY = this.tracker.getVelocityY(event.pointerId);\n    }\n  }\n\n  private checkBegan(): void {\n    if (this.currentState === State.BEGAN) {\n      if (this.shouldFail()) {\n        this.fail();\n      } else if (this.shouldActivate()) {\n        this.activate();\n      }\n    }\n  }\n\n  public activate(force = false): void {\n    if (this.currentState !== State.ACTIVE) {\n      this.resetProgress();\n    }\n\n    super.activate(force);\n  }\n\n  protected onCancel(): void {\n    this.clearActivationTimeout();\n  }\n\n  protected onReset(): void {\n    this.clearActivationTimeout();\n  }\n\n  protected resetProgress(): void {\n    if (this.currentState === State.ACTIVE) {\n      return;\n    }\n\n    this.startX = this.lastX;\n    this.startY = this.lastY;\n  }\n}\n"]}