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products/Sources/formale Sprachen/C/Apache/docs/manual/programs/ (Apache Software Stiftung Version 2.4.65^©) Datei vom 7.0.2025 mit Größe 14 kB

SSL message.js Sprache: unbekannt

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */

"use strict";

const REQUEST_DONE_SUFFIX = ":done";

function wait(win, type) {
  return new Promise(resolve => {
    const onMessage = event => {
      if (event.data.type !== type) {
        return;
      }
      win.removeEventListener("message", onMessage);
      resolve();
    };
    win.addEventListener("message", onMessage);
  });
}

/**
* Post a message to some window.
*
* @param win
*        The window to post to.
* @param typeOrMessage
*        Either a string or and an object representing the message to send.
*        If this is a string, it will be expanded into an object with the string as the
*        `type` field.  If this is an object, it will be sent as is.
*/
function post(win, typeOrMessage) {
  // When running unit tests on XPCShell, there is no window to send messages to.
  if (!win) {
    return;
  }

  let message = typeOrMessage;
  if (typeof typeOrMessage == "string") {
    message = {
      type: typeOrMessage,
    };
  }
  win.postMessage(message, "*");
}

function request(win, type) {
  const done = wait(win, type + REQUEST_DONE_SUFFIX);
  post(win, type);
  return done;
}

exports.wait = wait;
exports.post = post;
exports.request = request;

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