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Diffstat (limited to '')
-rw-r--r-- | dom/base/test/browser_bug1058164.js | 238 |
1 files changed, 238 insertions, 0 deletions
diff --git a/dom/base/test/browser_bug1058164.js b/dom/base/test/browser_bug1058164.js new file mode 100644 index 0000000000..0bb1098ef2 --- /dev/null +++ b/dom/base/test/browser_bug1058164.js @@ -0,0 +1,238 @@ +/* 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"; + +SpecialPowers.pushPrefEnv({ + set: [["security.allow_eval_with_system_principal", true]], +}); + +const PAGE = + "data:text/html,<html><body>A%20regular,%20everyday,%20normal%20page."; + +let gListenerId = 0; + +/** + * Adds a content event listener on the given browser element. NOTE: this test + * is checking the behavior of pageshow and pagehide as seen by frame scripts, + * so it is specifically implemented using the message message manager. + * Similar to BrowserTestUtils.waitForContentEvent, but the listener will fire + * until it is removed. A callable object is returned that, when called, removes + * the event listener. Note that this function works even if the browser's + * frameloader is swapped. + * + * @param {xul:browser} browser + * The browser element to listen for events in. + * @param {string} eventName + * Name of the event to listen to. + * @param {function} listener + * Function to call in parent process when event fires. + * Not passed any arguments. + * @param {function} checkFn [optional] + * Called with the Event object as argument, should return true if the + * event is the expected one, or false if it should be ignored and + * listening should continue. If not specified, the first event with + * the specified name resolves the returned promise. This is called + * within the content process and can have no closure environment. + * + * @returns function + * If called, the return value will remove the event listener. + */ +function addContentEventListenerWithMessageManager( + browser, + eventName, + listener, + checkFn +) { + let id = gListenerId++; + let checkFnSource = checkFn + ? encodeURIComponent(escape(checkFn.toSource())) + : ""; + + // To correctly handle frameloader swaps, we load a frame script + // into all tabs but ignore messages from the ones not related to + // |browser|. + + /* eslint-disable no-eval */ + function frameScript(innerId, innerEventName, innerCheckFnSource) { + let innerCheckFn; + if (innerCheckFnSource) { + innerCheckFn = eval(`(() => (${unescape(innerCheckFnSource)}))()`); + } + + function innerListener(event) { + if (innerCheckFn && !innerCheckFn(event)) { + return; + } + sendAsyncMessage("ContentEventListener:Run", innerId); + } + function removeListener(msg) { + if (msg.data == innerId) { + removeMessageListener("ContentEventListener:Remove", removeListener); + removeEventListener(innerEventName, innerListener); + } + } + addMessageListener("ContentEventListener:Remove", removeListener); + addEventListener(innerEventName, innerListener); + } + /* eslint-enable no-eval */ + + let frameScriptSource = `data:,(${frameScript.toString()})(${id}, "${eventName}", + "${checkFnSource}")`; + + let mm = Services.mm; + + function runListener(msg) { + if (msg.data == id && msg.target == browser) { + listener(); + } + } + mm.addMessageListener("ContentEventListener:Run", runListener); + + let needCleanup = true; + + let unregisterFunction = function () { + if (!needCleanup) { + return; + } + needCleanup = false; + mm.removeMessageListener("ContentEventListener:Run", runListener); + mm.broadcastAsyncMessage("ContentEventListener:Remove", id); + mm.removeDelayedFrameScript(frameScriptSource); + }; + + function cleanupObserver(subject, topic, data) { + if (subject == browser.messageManager) { + unregisterFunction(); + } + } + + mm.loadFrameScript(frameScriptSource, true); + + return unregisterFunction; +} + +/** + * Returns a Promise that resolves when it sees a pageshow and + * pagehide events in a particular order, where each event must + * have the persisted property set to true. Will cause a test + * failure to be logged if it sees an event out of order. + * + * @param browser (<xul:browser>) + * The browser to expect the events from. + * @param expectedOrder (array) + * An array of strings describing what order the pageshow + * and pagehide events should be in. + * Example: + * ["pageshow", "pagehide", "pagehide", "pageshow"] + * @returns Promise + */ +function prepareForVisibilityEvents(browser, expectedOrder) { + return new Promise(resolve => { + let order = []; + + let rmvHide, rmvShow; + + let checkSatisfied = () => { + if (order.length < expectedOrder.length) { + // We're still waiting... + return; + } else { + rmvHide(); + rmvShow(); + + for (let i = 0; i < expectedOrder.length; ++i) { + is(order[i], expectedOrder[i], "Got expected event"); + } + resolve(); + } + }; + + let eventListener = type => { + order.push(type); + checkSatisfied(); + }; + + let checkFn = e => e.persisted; + + rmvHide = addContentEventListenerWithMessageManager( + browser, + "pagehide", + () => eventListener("pagehide"), + checkFn + ); + rmvShow = addContentEventListenerWithMessageManager( + browser, + "pageshow", + () => eventListener("pageshow"), + checkFn + ); + }); +} + +/** + * Tests that frame scripts get pageshow / pagehide events when + * swapping browser frameloaders (which occurs when moving a tab + * into a different window). + */ +add_task(async function test_swap_frameloader_pagevisibility_events() { + // Disable window occlusion. Bug 1733955 + if (navigator.platform.indexOf("Win") == 0) { + await SpecialPowers.pushPrefEnv({ + set: [["widget.windows.window_occlusion_tracking.enabled", false]], + }); + } + + // Load a new tab that we'll tear out... + let tab = BrowserTestUtils.addTab(gBrowser, PAGE); + gBrowser.selectedTab = tab; + let firstBrowser = tab.linkedBrowser; + await BrowserTestUtils.browserLoaded(firstBrowser); + + // Swap the browser out to a new window + let newWindow = gBrowser.replaceTabWithWindow(tab); + + // We have to wait for the window to load so we can get the selected browser + // to listen to. + await BrowserTestUtils.waitForEvent(newWindow, "DOMContentLoaded"); + let newWindowBrowser = newWindow.gBrowser.selectedBrowser; + + // Wait for the expected pagehide and pageshow events on the initial browser + await prepareForVisibilityEvents(newWindowBrowser, ["pagehide", "pageshow"]); + + // Now let's send the browser back to the original window + + // First, create a new, empty browser tab to replace the window with + let newTab = BrowserTestUtils.addTab(gBrowser); + gBrowser.selectedTab = newTab; + let emptyBrowser = newTab.linkedBrowser; + + // Wait for that initial doc to be visible because if its pageshow hasn't + // happened we don't confuse it with the other expected events. + await ContentTask.spawn(emptyBrowser, null, async () => { + if (content.document.visibilityState === "hidden") { + info("waiting for hidden emptyBrowser to be visible"); + await ContentTaskUtils.waitForEvent( + content.document, + "visibilitychange", + {} + ); + } + }); + + info("emptyBrowser is shown now."); + + // The empty tab we just added show now fire a pagehide as its replaced, + // and a pageshow once the swap is finished. + let emptyBrowserPromise = prepareForVisibilityEvents(emptyBrowser, [ + "pagehide", + "pageshow", + ]); + + gBrowser.swapBrowsersAndCloseOther(newTab, newWindow.gBrowser.selectedTab); + + await emptyBrowserPromise; + + gBrowser.removeTab(gBrowser.selectedTab); +}); |