@inweb/viewer-visualize/src/Viewer/utils.ts

JavaScript library for rendering CAD and BIM files in a browser using VisualizeJS

///////////////////////////////////////////////////////////////////////////////
// Copyright (C) 2002-2025, Open Design Alliance (the "Alliance").
// All rights reserved.
//
// This software and its documentation and related materials are owned by
// the Alliance. The software may only be incorporated into application
// programs owned by members of the Alliance, subject to a signed
// Membership Agreement and Supplemental Software License Agreement with the
// Alliance. The structure and organization of this software are the valuable
// trade secrets of the Alliance and its suppliers. The software is also
// protected by copyright law and international treaty provisions. Application
// programs incorporating this software must include the following statement
// with their copyright notices:
//
//   This application incorporates Open Design Alliance software pursuant to a
//   license agreement with Open Design Alliance.
//   Open Design Alliance Copyright (C) 2002-2025 by Open Design Alliance.
//   All rights reserved.
//
// By use of this software, its documentation or related materials, you
// acknowledge and accept the above terms.
///////////////////////////////////////////////////////////////////////////////

interface LoadParams {
  crossOrigin?: string;
}

export function loadScript(url: string, params: LoadParams = {}): Promise<HTMLScriptElement> {
  return new Promise((resolve, reject) => {
    const script = document.createElement("script");
    script.src = url;
    script.async = true;
    script.crossOrigin = params.crossOrigin;
    script.onload = () => resolve(script);
    script.onerror = () => {
      script.remove();
      reject(new Error(`GET ${url} failed to load script`));
    };
    document.body.appendChild(script);
  });
}

function loadVisuazlizeJsScript(url: string, params: LoadParams): Promise<HTMLScriptElement> {
  if (window["getVisualizeLibInst"]) {
    const script = window["getVisualizeLibInst"].script;
    if (script) {
      if (script.src === url) return Promise.resolve(script);
      script.remove();
    }
    delete window["getVisualizeLibInst"];
  }
  return loadScript(url, params);
}

export const loadVisualizeJs = async (url: string, onprogress, params: LoadParams = {}): Promise<any> => {
  const script = await loadVisuazlizeJsScript(url, params);
  return await new Promise((resolve, reject) => {
    const options = {
      urlMemFile: url + ".wasm",
      TOTAL_MEMORY: 134217728,
      onprogress,
    };
    const instance = window["getVisualizeLibInst"](options);
    instance.loadWasmError = reject;
    instance.postRun.push(() => {
      window["getVisualizeLibInst"].script = script;
      resolve(instance);
    });
  });
};