react-native-reanimated/src/layoutReanimation/defaultAnimations/Pinwheel.ts

More powerful alternative to Animated library for React Native.

'use strict';
import type {
  EntryExitAnimationFunction,
  IEntryExitAnimationBuilder,
} from '../../commonTypes';
import type { BaseAnimationBuilder } from '../animationBuilder';
import { ComplexAnimationBuilder } from '../animationBuilder';
import type { Rotate, Scale, TransformsConfig } from './types';
import { animateTransformToValues, pickTransformValues } from './utils';

/**
 * Entry with change in rotation, scale, and opacity. You can modify the
 * behavior by chaining methods like `.springify()` or `.duration(500)`.
 *
 * You pass it to the `entering` prop on [an Animated
 * component](https://docs.swmansion.com/react-native-reanimated/docs/fundamentals/glossary#animated-component).
 *
 * @see https://docs.swmansion.com/react-native-reanimated/docs/layout-animations/entering-exiting-animations#pinwheel
 */
export class PinwheelIn
  extends ComplexAnimationBuilder<
    { opacity: number } & TransformsConfig<[Scale, Rotate]>
  >
  implements IEntryExitAnimationBuilder
{
  static presetName = 'PinwheelIn';

  static createInstance<T extends typeof BaseAnimationBuilder>(
    this: T
  ): InstanceType<T> {
    return new PinwheelIn() as InstanceType<T>;
  }

  build = (): EntryExitAnimationFunction => {
    const delayFunction = this.getDelayFunction();
    const animationAndConfig = this.getAnimationAndConfig();
    const [animation, config] = animationAndConfig;
    const delay = this.getDelay();
    const callback = this.callbackV;
    const initialValues = this.initialValues;
    const targetValues = this.targetValues;

    return () => {
      'worklet';
      return {
        animations: {
          opacity: delayFunction(
            delay,
            animation(targetValues?.opacity ?? 1, config)
          ),
          transform: animateTransformToValues(
            [{ scale: 1 }, { rotate: '0rad' }],
            targetValues,
            animationAndConfig,
            delayFunction,
            delay
          ),
        },
        initialValues: {
          opacity: initialValues?.opacity ?? 0,
          transform: pickTransformValues(
            [{ scale: 0 }, { rotate: '5rad' }],
            initialValues
          ),
        },
        callback,
      };
    };
  };
}

/**
 * Exit with change in rotation, scale, and opacity. You can modify the behavior
 * by chaining methods like `.springify()` or `.duration(500)`.
 *
 * You pass it to the `exiting` prop on [an Animated
 * component](https://docs.swmansion.com/react-native-reanimated/docs/fundamentals/glossary#animated-component).
 *
 * @see https://docs.swmansion.com/react-native-reanimated/docs/layout-animations/entering-exiting-animations#pinwheel
 */
export class PinwheelOut
  extends ComplexAnimationBuilder<
    { opacity: number } & TransformsConfig<[Scale, Rotate]>
  >
  implements IEntryExitAnimationBuilder
{
  static presetName = 'PinwheelOut';

  static createInstance<T extends typeof BaseAnimationBuilder>(
    this: T
  ): InstanceType<T> {
    return new PinwheelOut() as InstanceType<T>;
  }

  build = (): EntryExitAnimationFunction => {
    const delayFunction = this.getDelayFunction();
    const animationAndConfig = this.getAnimationAndConfig();
    const [animation, config] = animationAndConfig;
    const delay = this.getDelay();
    const callback = this.callbackV;
    const initialValues = this.initialValues;
    const targetValues = this.targetValues;

    return () => {
      'worklet';
      return {
        animations: {
          opacity: delayFunction(
            delay,
            animation(targetValues?.opacity ?? 0, config)
          ),
          transform: animateTransformToValues(
            [{ scale: 0 }, { rotate: '5rad' }],
            targetValues,
            animationAndConfig,
            delayFunction,
            delay
          ),
        },
        initialValues: {
          opacity: initialValues?.opacity ?? 1,
          transform: pickTransformValues(
            [{ scale: 1 }, { rotate: '0rad' }],
            initialValues
          ),
        },
        callback,
      };
    };
  };
}