{
  "version": 3,
  "sources": ["../../../src/navigator/navigator-screen/use-screen-animate-presence.ts"],
  "sourcesContent": ["/**\n * WordPress dependencies\n */\nimport { useState, useEffect, useLayoutEffect, useCallback } from '@wordpress/element';\nimport { useReducedMotion } from '@wordpress/compose';\nimport { isRTL as isRTLFn } from '@wordpress/i18n';\n\n/**\n * Internal dependencies\n */\nimport * as styles from '../styles';\n\n// Possible values:\n// - 'INITIAL': the initial state\n// - 'ANIMATING_IN': start enter animation\n// - 'IN': enter animation has ended\n// - 'ANIMATING_OUT': start exit animation\n// - 'OUT': the exit animation has ended\n\n// Allow an extra 20% of the total animation duration to account for potential\n// event loop delays.\nconst ANIMATION_TIMEOUT_MARGIN = 1.2;\nconst isEnterAnimation = (animationDirection, animationStatus, animationName) => animationStatus === 'ANIMATING_IN' && animationName === styles.ANIMATION_END_NAMES[animationDirection].in;\nconst isExitAnimation = (animationDirection, animationStatus, animationName) => animationStatus === 'ANIMATING_OUT' && animationName === styles.ANIMATION_END_NAMES[animationDirection].out;\nexport function useScreenAnimatePresence({\n  isMatch,\n  skipAnimation,\n  isBack,\n  onAnimationEnd\n}) {\n  const isRTL = isRTLFn();\n  const prefersReducedMotion = useReducedMotion();\n  const [animationStatus, setAnimationStatus] = useState('INITIAL');\n\n  // Start enter and exit animations when the screen is selected or deselected.\n  // The animation status is set to `IN` or `OUT` immediately if the animation\n  // should be skipped.\n  const becameSelected = animationStatus !== 'ANIMATING_IN' && animationStatus !== 'IN' && isMatch;\n  const becameUnselected = animationStatus !== 'ANIMATING_OUT' && animationStatus !== 'OUT' && !isMatch;\n  useLayoutEffect(() => {\n    if (becameSelected) {\n      setAnimationStatus(skipAnimation || prefersReducedMotion ? 'IN' : 'ANIMATING_IN');\n    } else if (becameUnselected) {\n      setAnimationStatus(skipAnimation || prefersReducedMotion ? 'OUT' : 'ANIMATING_OUT');\n    }\n  }, [becameSelected, becameUnselected, skipAnimation, prefersReducedMotion]);\n\n  // Animation attributes (derived state).\n  const animationDirection = isRTL && isBack || !isRTL && !isBack ? 'end' : 'start';\n  const isAnimatingIn = animationStatus === 'ANIMATING_IN';\n  const isAnimatingOut = animationStatus === 'ANIMATING_OUT';\n  let animationType;\n  if (isAnimatingIn) {\n    animationType = 'in';\n  } else if (isAnimatingOut) {\n    animationType = 'out';\n  }\n  const onScreenAnimationEnd = useCallback(e => {\n    onAnimationEnd?.(e);\n    if (isExitAnimation(animationDirection, animationStatus, e.animationName)) {\n      // When the exit animation ends on an unselected screen, set the\n      // status to 'OUT' to remove the screen contents from the DOM.\n      setAnimationStatus('OUT');\n    } else if (isEnterAnimation(animationDirection, animationStatus, e.animationName)) {\n      // When the enter animation ends on a selected screen, set the\n      // status to 'IN' to ensure the screen is rendered in the DOM.\n      setAnimationStatus('IN');\n    }\n  }, [onAnimationEnd, animationStatus, animationDirection]);\n\n  // Fallback timeout to ensure that the logic is applied even if the\n  // `animationend` event is not triggered.\n  useEffect(() => {\n    let animationTimeout;\n    if (isAnimatingOut) {\n      animationTimeout = window.setTimeout(() => {\n        setAnimationStatus('OUT');\n        animationTimeout = undefined;\n      }, styles.TOTAL_ANIMATION_DURATION.OUT * ANIMATION_TIMEOUT_MARGIN);\n    } else if (isAnimatingIn) {\n      animationTimeout = window.setTimeout(() => {\n        setAnimationStatus('IN');\n        animationTimeout = undefined;\n      }, styles.TOTAL_ANIMATION_DURATION.IN * ANIMATION_TIMEOUT_MARGIN);\n    }\n    return () => {\n      if (animationTimeout) {\n        window.clearTimeout(animationTimeout);\n        animationTimeout = undefined;\n      }\n    };\n  }, [isAnimatingOut, isAnimatingIn]);\n  return {\n    animationStyles: styles.navigatorScreenAnimation,\n    // Render the screen's contents in the DOM not only when the screen is\n    // selected, but also while it is animating out.\n    shouldRenderScreen: isMatch || animationStatus === 'IN' || animationStatus === 'ANIMATING_OUT',\n    screenProps: {\n      onAnimationEnd: onScreenAnimationEnd,\n      'data-animation-direction': animationDirection,\n      'data-animation-type': animationType,\n      'data-skip-animation': skipAnimation || undefined\n    }\n  };\n}"],
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