lingo3d/lib/utils/getReactive.js

Lingo3D is a React/Vue 3d game development framework that ships with a complete visual editor

import { Reactive } from "@lincode/reactivity";
import { assert, forceGetInstance } from "@lincode/utils";
import unsafeGetValue from "./unsafeGetValue";
import unsafeSetValue from "./unsafeSetValue";
const prototypeDescriptorMap = new WeakMap();
const getPropertyDescriptor = (obj, key) => {
    if (!obj)
        return;
    const descriptorMap = forceGetInstance(prototypeDescriptorMap, obj, (Map));
    if (descriptorMap.has(key))
        return descriptorMap.get(key);
    const desc = Object.getOwnPropertyDescriptor(obj, key);
    if (desc) {
        descriptorMap.set(key, desc);
        return desc;
    }
    return getPropertyDescriptor(Object.getPrototypeOf(obj), key);
};
export default (manager, key) => {
    const stateKey = `${key}State`;
    let reactive = unsafeGetValue(manager, stateKey);
    if (reactive)
        return reactive;
    unsafeSetValue(manager, stateKey, (reactive = new Reactive(unsafeGetValue(manager, key))));
    const desc = getPropertyDescriptor(manager, key);
    assert(desc, `Property "${key}" not found`);
    if ("value" in desc)
        Object.defineProperty(manager, key, {
            get() {
                return reactive.get();
            },
            set(value) {
                reactive.set(value);
            }
        });
    else
        Object.defineProperty(manager, key, {
            get() {
                return desc.get.call(manager);
            },
            set(value) {
                reactive.set(value);
                desc.set.call(manager, value);
            }
        });
    return reactive;
};
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