From 36d22d82aa202bb199967e9512281e9a53db42c9 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 21:33:14 +0200 Subject: Adding upstream version 115.7.0esr. Signed-off-by: Daniel Baumann --- devtools/shared/dom-helpers.js | 51 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 51 insertions(+) create mode 100644 devtools/shared/dom-helpers.js (limited to 'devtools/shared/dom-helpers.js') diff --git a/devtools/shared/dom-helpers.js b/devtools/shared/dom-helpers.js new file mode 100644 index 0000000000..3646855560 --- /dev/null +++ b/devtools/shared/dom-helpers.js @@ -0,0 +1,51 @@ +/* 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"; + +exports.DOMHelpers = { + /** + * A simple way to be notified (once) when a window becomes + * interactive (DOMContentLoaded). + * + * It is based on the chromeEventHandler. This is useful when + * chrome iframes are loaded in content docshells (in Firefox + * tabs for example). + * + * @param nsIDOMWindow win + * The content window, owning the document to traverse. + * @param Function callback + * The method to call when the frame is loaded. + * @param String targetURL + * (optional) Check that the frame URL corresponds to the provided URL + * before calling the callback. + */ + onceDOMReady(win, callback, targetURL) { + if (!win) { + throw new Error("window can't be null or undefined"); + } + const docShell = win.docShell; + const onReady = function (event) { + if (event.target == win.document) { + docShell.chromeEventHandler.removeEventListener( + "DOMContentLoaded", + onReady + ); + // If in `callback` the URL of the window is changed and a listener to DOMContentLoaded + // is attached, the event we just received will be also be caught by the new listener. + // We want to avoid that so we execute the callback in the next queue. + Services.tm.dispatchToMainThread(callback); + } + }; + if ( + (win.document.readyState == "complete" || + win.document.readyState == "interactive") && + win.location.href == targetURL + ) { + Services.tm.dispatchToMainThread(callback); + } else { + docShell.chromeEventHandler.addEventListener("DOMContentLoaded", onReady); + } + }, +}; -- cgit v1.2.3