react-native-reanimated/lib/module/hook/useAnimatedStyleCommon.js

More powerful alternative to Animated library for React Native.

'use strict';

import { updateProps } from "../updateProps/index.js";
import { isAnimated, shallowEqual } from "./utils.js";
export function prepareAnimation(frameTimestamp,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
animatedProp,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
lastAnimation,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
lastValue) {
  'worklet';

  if (Array.isArray(animatedProp)) {
    animatedProp.forEach((prop, index) => {
      prepareAnimation(frameTimestamp, prop, lastAnimation && lastAnimation[index], lastValue && lastValue[index]);
    });
    // return animatedProp;
  }
  if (typeof animatedProp === 'object' && animatedProp.onFrame) {
    const animation = animatedProp;
    let value = animation.current;
    if (lastValue !== undefined && lastValue !== null) {
      if (typeof lastValue === 'object') {
        if (lastValue.value !== undefined) {
          // previously it was a shared value
          value = lastValue.value;
        } else if (lastValue.onFrame !== undefined) {
          if (lastAnimation?.current !== undefined) {
            // it was an animation before, copy its state
            value = lastAnimation.current;
          } else if (lastValue?.current !== undefined) {
            // it was initialized
            value = lastValue.current;
          }
        }
      } else {
        // previously it was a plain value, just set it as starting point
        value = lastValue;
      }
    }
    animation.callStart = timestamp => {
      animation.onStart(animation, value, timestamp, lastAnimation);
    };
    animation.callStart(frameTimestamp);
    animation.callStart = null;
  } else if (typeof animatedProp === 'object') {
    // it is an object
    Object.keys(animatedProp).forEach(key => prepareAnimation(frameTimestamp, animatedProp[key], lastAnimation && lastAnimation[key], lastValue && lastValue[key]));
  }
}
export function runAnimations(
// eslint-disable-next-line @typescript-eslint/no-explicit-any
animation, timestamp, key,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
result, animationsActive, forceCopyAnimation) {
  'worklet';

  if (!animationsActive.value) {
    return true;
  }
  if (Array.isArray(animation)) {
    result[key] = [];
    let allFinished = true;
    forceCopyAnimation = key === 'boxShadow';
    animation.forEach((entry, index) => {
      if (!runAnimations(entry, timestamp, index, result[key], animationsActive, forceCopyAnimation)) {
        allFinished = false;
      }
    });
    return allFinished;
  } else if (typeof animation === 'object' && animation.onFrame) {
    let finished = true;
    if (!animation.finished) {
      if (animation.callStart) {
        animation.callStart(timestamp);
        animation.callStart = null;
      }
      finished = animation.onFrame(animation, timestamp);
      animation.timestamp = timestamp;
      if (finished) {
        animation.finished = true;
        animation.callback?.(true /* finished */);
      }
    }
    /*
     * If `animation.current` is a boxShadow object, spread its properties into a new object
     * to avoid modifying the original reference. This ensures when `newValues` has a nested color prop, it stays unparsed
     * in rgba format, allowing the animation to run correctly. Additionally we need to check if user animated the whole boxShadow object or only one of its properties.
     */
    if (forceCopyAnimation && typeof animation.current === 'object') {
      result[key] = {
        ...animation.current
      };
    } else {
      result[key] = animation.current;
    }
    return finished;
  } else if (typeof animation === 'object') {
    result[key] = {};
    let allFinished = true;
    Object.keys(animation).forEach(k => {
      if (!runAnimations(animation[k], timestamp, k, result[key], animationsActive, forceCopyAnimation)) {
        allFinished = false;
      }
    });
    return allFinished;
  } else {
    result[key] = animation;
    return true;
  }
}
export function styleUpdater(viewDescriptors,
// eslint-disable-next-line @typescript-eslint/no-explicit-any
updater, state, animationsActive, isAnimatedProps = false, forceUpdate) {
  'worklet';

  const animations = state.animations ?? {};
  const newValues = updater() ?? {};
  const oldValues = state.last;
  const nonAnimatedNewValues = {};
  let hasAnimations = false;
  let frameTimestamp;
  let hasNonAnimatedValues = false;
  for (const key in newValues) {
    const value = newValues[key];
    if (isAnimated(value)) {
      frameTimestamp = global.__frameTimestamp || global._getAnimationTimestamp();
      prepareAnimation(frameTimestamp, value, animations[key], oldValues[key]);
      animations[key] = value;
      hasAnimations = true;
    } else {
      hasNonAnimatedValues = true;
      nonAnimatedNewValues[key] = value;
      delete animations[key];
    }
  }
  if (hasAnimations) {
    const frame = timestamp => {
      // eslint-disable-next-line @typescript-eslint/no-shadow
      const {
        animations,
        last,
        isAnimationCancelled
      } = state;
      if (isAnimationCancelled) {
        state.isAnimationRunning = false;
        return;
      }

      // eslint-disable-next-line @typescript-eslint/no-explicit-any
      const updates = {};
      let allFinished = true;
      for (const propName in animations) {
        const finished = runAnimations(animations[propName], timestamp, propName, updates, animationsActive);
        if (finished) {
          /**
           * If the animated prop is an array, we need to directly set each
           * property (manually spread it). This prevents issues where the color
           * prop might be incorrectly linked with its `toValue` and `current`
           * states, causing abrupt transitions or 'jumps' in animation states.
           */
          if (Array.isArray(updates[propName])) {
            updates[propName].forEach(obj => {
              for (const prop in obj) {
                if (!last[propName] || typeof last[propName] !== 'object') {
                  last[propName] = {};
                }
                last[propName][prop] = obj[prop];
              }
            });
          } else {
            last[propName] = updates[propName];
          }
          delete animations[propName];
        } else {
          allFinished = false;
        }
      }
      if (updates) {
        updateProps(viewDescriptors, updates, isAnimatedProps);
      }
      if (!allFinished) {
        requestAnimationFrame(frame);
      } else {
        state.isAnimationRunning = false;
      }
    };
    state.animations = animations;
    if (!state.isAnimationRunning) {
      state.isAnimationCancelled = false;
      state.isAnimationRunning = true;
      frame(frameTimestamp);
    }
    if (hasNonAnimatedValues) {
      updateProps(viewDescriptors, nonAnimatedNewValues, isAnimatedProps);
    }
  } else {
    state.isAnimationCancelled = true;
    state.animations = [];
    if (!shallowEqual(oldValues, newValues) || forceUpdate) {
      updateProps(viewDescriptors, newValues, isAnimatedProps);
    }
  }
  state.last = newValues;
}
export function checkSharedValueUsage(prop, currentKey) {
  if (Array.isArray(prop)) {
    // if it's an array (i.ex. transform) validate all its elements
    for (const element of prop) {
      checkSharedValueUsage(element, currentKey);
    }
  } else if (typeof prop === 'object' && prop !== null && prop.value === undefined) {
    // if it's a nested object, run validation for all its props
    for (const key of Object.keys(prop)) {
      checkSharedValueUsage(prop[key], key);
    }
  } else if (currentKey !== undefined && typeof prop === 'object' && prop !== null && prop.value !== undefined) {
    // if shared value is passed instead of its value, throw an error
    throw new Error(`[Reanimated] Invalid value passed to \`${currentKey}\`, maybe you forgot to use \`.value\`?`);
  }
}

// Builds one big hash from multiple worklets' hashes.
export function buildWorkletsHash(worklets) {
  // For arrays `Object.values` returns the array itself.
  return Object.values(worklets).reduce((acc, worklet) => acc + worklet.__workletHash.toString(), '');
}
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