@onlyoffice/docspace-plugin-sdk/npx/helpers/postMessage.js

Simple plugin system for onlyoffice docspace

/*
* (c) Copyright Ascensio System SIA 2026
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
*     http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/

const IPostMessagePlugin = "IPostMessagePlugin";
const IPostMessageCallbackMessage = "IPostMessageCallbackMessage";

const postMessageCallback = `
  postMessageCallback: (message: IPostMessageCallbackMessage) => void = () => {};`;

const setPostMessageCallback = `
  setPostMessageCallback = (callback: (message: IPostMessageCallbackMessage) => void): void => {
    this.postMessageCallback = callback;
  };`;

const getPostMessageCallback = `
  getPostMessageCallback = (): ((message: IPostMessageCallbackMessage) => void) => {
    return this.postMessageCallback;
  };`;

export const getPostMessageTemp = (withPostMessage) => {
  if (!withPostMessage)
    return {
      IPostMessagePlugin,
      IPostMessageCallbackMessage,

      postMessageVars: "",
      postMessageMeth: "",
    };

  let postMessageVars = "";
  let postMessageMeth = "";

  postMessageVars = `
  ${postMessageCallback}`;

  postMessageMeth = `
        ${setPostMessageCallback}
        ${getPostMessageCallback}`;

  return {
    IPostMessagePlugin,
    IPostMessageCallbackMessage,
    postMessageVars,
    postMessageMeth,
  };
};