@visactor/vrender-animate/es/custom/transient.js

This module provides a graph-based animation system for VRender.

import { AttributeUpdateType } from "@visactor/vrender-core/event/constant";

const animateUpdateContext = {
    type: AttributeUpdateType.ANIMATE_UPDATE
}, animateBindContext = {
    type: AttributeUpdateType.ANIMATE_BIND
}, animateStartContext = {
    type: AttributeUpdateType.ANIMATE_START
};

function getAnimationContext(type) {
    switch (type) {
      case AttributeUpdateType.ANIMATE_UPDATE:
        return animateUpdateContext;

      case AttributeUpdateType.ANIMATE_BIND:
        return animateBindContext;

      case AttributeUpdateType.ANIMATE_START:
        return animateStartContext;

      default:
        return {
            type: type
        };
    }
}

function prepareAnimationFrameAttribute(target) {
    const transientTarget = target;
    return transientTarget.attribute || (transientTarget.attribute = {}), transientTarget.attribute === transientTarget.baseAttributes && transientTarget.detachAttributeFromBaseAttributes(), 
    transientTarget.attributeMayContainTransientAttrs = !0, transientTarget.attribute;
}

function commitAnimationFrameAttribute(target) {
    target.onAttributeUpdate(animateUpdateContext);
}

export function applyAnimationFrameAttributes(target, attributes) {
    if (!attributes) return;
    const targetAttribute = prepareAnimationFrameAttribute(target);
    for (const key in attributes) Object.prototype.hasOwnProperty.call(attributes, key) && (targetAttribute[key] = attributes[key]);
    commitAnimationFrameAttribute(target);
}

export function applyAnimationFrameNumberAttributes(target, keys, from, to, ratio) {
    const targetAttribute = prepareAnimationFrameAttribute(target);
    for (let i = 0; i < keys.length; i++) {
        const key = keys[i];
        targetAttribute[key] = from[key] + (to[key] - from[key]) * ratio;
    }
    commitAnimationFrameAttribute(target);
}

export function applyAnimationTransientAttributes(target, attributes, type = AttributeUpdateType.ANIMATE_UPDATE) {
    if (!attributes) return;
    const context = getAnimationContext(type);
    target.applyAnimationTransientAttributes(attributes, !1, context);
}

export function applyAppearStartAttributes(target, attributes) {
    applyAnimationTransientAttributes(target, attributes, AttributeUpdateType.ANIMATE_BIND);
}
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