1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/browser/base/content/test/general/browser_windowopen_reflows.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,117 @@
1.4 +/* Any copyright is dedicated to the Public Domain.
1.5 + http://creativecommons.org/publicdomain/zero/1.0/ */
1.6 +
1.7 +"use strict";
1.8 +
1.9 +const EXPECTED_REFLOWS = [
1.10 + // handleEvent flushes layout to get the tabstrip width after a resize.
1.11 + "handleEvent@chrome://browser/content/tabbrowser.xml|",
1.12 +
1.13 + // Loading a tab causes a reflow.
1.14 + "loadTabs@chrome://browser/content/tabbrowser.xml|" +
1.15 + "loadOneOrMoreURIs@chrome://browser/content/browser.js|" +
1.16 + "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|",
1.17 +
1.18 + // Selecting the address bar causes a reflow.
1.19 + "select@chrome://global/content/bindings/textbox.xml|" +
1.20 + "focusAndSelectUrlBar@chrome://browser/content/browser.js|" +
1.21 + "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|",
1.22 +
1.23 + // Focusing the content area causes a reflow.
1.24 + "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|",
1.25 +
1.26 + // Sometimes sessionstore collects data during this test, which causes a sync reflow
1.27 + // (https://bugzilla.mozilla.org/show_bug.cgi?id=892154 will fix this)
1.28 + "ssi_getWindowDimension@resource:///modules/sessionstore/SessionStore.jsm",
1.29 +];
1.30 +
1.31 +if (Services.appinfo.OS == "WINNT" || Services.appinfo.OS == "Darwin") {
1.32 + // TabsInTitlebar._update causes a reflow on OS X and Windows trying to do calculations
1.33 + // since layout info is already dirty. This doesn't seem to happen before
1.34 + // MozAfterPaint on Linux.
1.35 + EXPECTED_REFLOWS.push("rect@chrome://browser/content/browser.js|" +
1.36 + "TabsInTitlebar._update@chrome://browser/content/browser.js|" +
1.37 + "updateAppearance@chrome://browser/content/browser.js|" +
1.38 + "handleEvent@chrome://browser/content/tabbrowser.xml|");
1.39 +}
1.40 +
1.41 +if (Services.appinfo.OS == "Darwin") {
1.42 + // _onOverflow causes a reflow getting widths.
1.43 + EXPECTED_REFLOWS.push("OverflowableToolbar.prototype._onOverflow@resource:///modules/CustomizableUI.jsm|" +
1.44 + "OverflowableToolbar.prototype.init@resource:///modules/CustomizableUI.jsm|" +
1.45 + "OverflowableToolbar.prototype.observe@resource:///modules/CustomizableUI.jsm|" +
1.46 + "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|");
1.47 + // Same as above since in packaged builds there are no function names and the resource URI includes "app"
1.48 + EXPECTED_REFLOWS.push("@resource://app/modules/CustomizableUI.jsm|" +
1.49 + "@resource://app/modules/CustomizableUI.jsm|" +
1.50 + "@resource://app/modules/CustomizableUI.jsm|" +
1.51 + "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|");
1.52 +}
1.53 +
1.54 +/*
1.55 + * This test ensures that there are no unexpected
1.56 + * uninterruptible reflows when opening new windows.
1.57 + */
1.58 +function test() {
1.59 + waitForExplicitFinish();
1.60 +
1.61 + // Add a reflow observer and open a new window
1.62 + let win = OpenBrowserWindow();
1.63 + let docShell = win.QueryInterface(Ci.nsIInterfaceRequestor)
1.64 + .getInterface(Ci.nsIWebNavigation)
1.65 + .QueryInterface(Ci.nsIDocShell);
1.66 + docShell.addWeakReflowObserver(observer);
1.67 +
1.68 + // Wait until the mozafterpaint event occurs.
1.69 + waitForMozAfterPaint(win, function paintListener() {
1.70 + // Remove reflow observer and clean up.
1.71 + docShell.removeWeakReflowObserver(observer);
1.72 + win.close();
1.73 +
1.74 + finish();
1.75 + });
1.76 +}
1.77 +
1.78 +let observer = {
1.79 + reflow: function (start, end) {
1.80 + // Gather information about the current code path.
1.81 + let stack = new Error().stack;
1.82 + let path = stack.split("\n").slice(1).map(line => {
1.83 + return line.replace(/:\d+:\d+$/, "");
1.84 + }).join("|");
1.85 + let pathWithLineNumbers = (new Error().stack).split("\n").slice(1).join("|");
1.86 +
1.87 + // Stack trace is empty. Reflow was triggered by native code.
1.88 + if (path === "") {
1.89 + return;
1.90 + }
1.91 +
1.92 + // Check if this is an expected reflow.
1.93 + for (let expectedStack of EXPECTED_REFLOWS) {
1.94 + if (path.startsWith(expectedStack) ||
1.95 + // Accept an empty function name for gBrowserInit._delayedStartup or TabsInTitlebar._update to workaround bug 906578.
1.96 + path.startsWith(expectedStack.replace(/(^|\|)(gBrowserInit\._delayedStartup|TabsInTitlebar\._update)@/, "$1@"))) {
1.97 + ok(true, "expected uninterruptible reflow '" + expectedStack + "'");
1.98 + return;
1.99 + }
1.100 + }
1.101 +
1.102 + ok(false, "unexpected uninterruptible reflow '" + pathWithLineNumbers + "'");
1.103 + },
1.104 +
1.105 + reflowInterruptible: function (start, end) {
1.106 + // We're not interested in interruptible reflows.
1.107 + },
1.108 +
1.109 + QueryInterface: XPCOMUtils.generateQI([Ci.nsIReflowObserver,
1.110 + Ci.nsISupportsWeakReference])
1.111 +};
1.112 +
1.113 +function waitForMozAfterPaint(win, callback) {
1.114 + win.addEventListener("MozAfterPaint", function onEnd(event) {
1.115 + if (event.target != win)
1.116 + return;
1.117 + win.removeEventListener("MozAfterPaint", onEnd);
1.118 + executeSoon(callback);
1.119 + });
1.120 +}
