@needle-tools/engine/lib/engine/js-extensions/ExtensionUtils.js

Needle Engine is a web-based runtime for 3D apps. It runs on your machine for development with great integrations into editors like Unity or Blender - and can be deployed onto any device! It is flexible, extensible and networking and XR are built-in.

const handlers = new Map();
/** @internal */
export function applyPrototypeExtensions(obj, prototype) {
    if (!obj)
        return;
    // const prototype = Object.getPrototypeOf(obj);
    // console.log("TEST", prototype)
    if (!prototype) {
        console.warn("No prototype found", obj, obj.prototype, obj.constructor);
        return;
    }
    const handler = handlers.get(prototype);
    if (handler) {
        // console.log("OK", prototype);
        handler.apply(obj);
    }
    // applyPrototypeExtensions(prototype);
}
/** @internal */
export function registerPrototypeExtensions(type) {
    // console.log("Register", type.prototype.constructor.name);
    const handler = createPrototypeExtensionHandler(type.prototype);
    handlers.set(type, handler);
}
function createPrototypeExtensionHandler(prototype) {
    return new ApplyPrototypeExtension(prototype);
}
class ApplyPrototypeExtension {
    $symbol;
    extensions;
    descriptors;
    constructor(prototype) {
        this.$symbol = Symbol("prototype-extension");
        // used to decorate cloned object3D objects with the same added components defined above
        this.extensions = Object.keys(prototype);
        // console.log(this.extensions);
        this.descriptors = new Array();
        for (let i = 0; i < this.extensions.length; i++) {
            const key = this.extensions[i];
            // console.log(key);
            const descriptor = Object.getOwnPropertyDescriptor(prototype, key);
            if (descriptor) {
                this.descriptors.push(descriptor);
            }
        }
    }
    apply(object) {
        if (object[this.$symbol])
            return;
        object[this.$symbol] = true;
        // const prototype = object.constructor.prototype;
        for (let i = 0; i < this.extensions.length; i++) {
            const key = this.extensions[i];
            const desc = this.descriptors[i];
            if (desc) {
                // if (prototype) {
                //     const exists = Object.getOwnPropertyDescriptor(prototype, key);
                //     if (exists) {
                //         continue;
                //     }
                // }
                // console.warn("DEFINE", object, key);
                Object.defineProperty(object, key, desc);
            }
        }
    }
}
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