react-native-reanimated/lib/module/layoutReanimation/defaultTransitions/SequencedTransition.js

More powerful alternative to Animated library for React Native.

'use strict';

import { withSequence, withTiming } from "../../animation/index.js";
import { BaseAnimationBuilder } from "../animationBuilder/index.js";

/**
 * Transforms layout starting from the X-axis and width first, followed by the
 * Y-axis and height. You can modify the behavior by chaining methods like
 * `.springify()` or `.duration(500)`.
 *
 * You pass it to the `layout` 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/layout-transitions#sequenced-transition
 */
export class SequencedTransition extends BaseAnimationBuilder {
  static presetName = 'SequencedTransition';
  reversed = false;
  static createInstance() {
    return new SequencedTransition();
  }
  static reverse() {
    const instance = SequencedTransition.createInstance();
    return instance.reverse();
  }
  reverse() {
    this.reversed = !this.reversed;
    return this;
  }
  build = () => {
    const delayFunction = this.getDelayFunction();
    const callback = this.callbackV;
    const delay = this.getDelay();
    const halfDuration = (this.durationV ?? 500) / 2;
    const config = {
      duration: halfDuration
    };
    const reverse = this.reversed;
    return values => {
      'worklet';

      return {
        initialValues: {
          originX: values.currentOriginX,
          originY: values.currentOriginY,
          width: values.currentWidth,
          height: values.currentHeight
        },
        animations: {
          originX: delayFunction(delay, withSequence(withTiming(reverse ? values.currentOriginX : values.targetOriginX, config), withTiming(values.targetOriginX, config))),
          originY: delayFunction(delay, withSequence(withTiming(reverse ? values.targetOriginY : values.currentOriginY, config), withTiming(values.targetOriginY, config))),
          width: delayFunction(delay, withSequence(withTiming(reverse ? values.currentWidth : values.targetWidth, config), withTiming(values.targetWidth, config))),
          height: delayFunction(delay, withSequence(withTiming(reverse ? values.targetHeight : values.currentHeight, config), withTiming(values.targetHeight, config)))
        },
        callback
      };
    };
  };
}
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