The Tor Browser: browser/base/content/test/general/browser_windowopen

Cloned upstream origin tor-browser at tor-browser-31.3.0esr-4.5-1-build1
revision ID fc1c9ff7c1b2defdbc039f12214767608f46423f for hacking purpose.

     1 /* Any copyright is dedicated to the Public Domain.

     2    http://creativecommons.org/publicdomain/zero/1.0/ */

     4 "use strict";

     6 const EXPECTED_REFLOWS = [

     7   // handleEvent flushes layout to get the tabstrip width after a resize.

     8   "handleEvent@chrome://browser/content/tabbrowser.xml|",

    10   // Loading a tab causes a reflow.

    11   "loadTabs@chrome://browser/content/tabbrowser.xml|" +

    12     "loadOneOrMoreURIs@chrome://browser/content/browser.js|" +

    13     "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|",

    15   // Selecting the address bar causes a reflow.

    16   "select@chrome://global/content/bindings/textbox.xml|" +

    17     "focusAndSelectUrlBar@chrome://browser/content/browser.js|" +

    18     "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|",

    20   // Focusing the content area causes a reflow.

    21   "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|",

    23   // Sometimes sessionstore collects data during this test, which causes a sync reflow

    24   // (https://bugzilla.mozilla.org/show_bug.cgi?id=892154 will fix this)

    25   "ssi_getWindowDimension@resource:///modules/sessionstore/SessionStore.jsm",

    26 ];

    28 if (Services.appinfo.OS == "WINNT" || Services.appinfo.OS == "Darwin") {

    29   // TabsInTitlebar._update causes a reflow on OS X and Windows trying to do calculations

    30   // since layout info is already dirty. This doesn't seem to happen before

    31   // MozAfterPaint on Linux.

    32   EXPECTED_REFLOWS.push("rect@chrome://browser/content/browser.js|" +

    33                           "TabsInTitlebar._update@chrome://browser/content/browser.js|" +

    34                           "updateAppearance@chrome://browser/content/browser.js|" +

    35                           "handleEvent@chrome://browser/content/tabbrowser.xml|");

    36 }

    38 if (Services.appinfo.OS == "Darwin") {

    39   // _onOverflow causes a reflow getting widths.

    40   EXPECTED_REFLOWS.push("OverflowableToolbar.prototype._onOverflow@resource:///modules/CustomizableUI.jsm|" +

    41                         "OverflowableToolbar.prototype.init@resource:///modules/CustomizableUI.jsm|" +

    42                         "OverflowableToolbar.prototype.observe@resource:///modules/CustomizableUI.jsm|" +

    43                         "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|");

    44   // Same as above since in packaged builds there are no function names and the resource URI includes "app"

    45   EXPECTED_REFLOWS.push("@resource://app/modules/CustomizableUI.jsm|" +

    46                           "@resource://app/modules/CustomizableUI.jsm|" +

    47                           "@resource://app/modules/CustomizableUI.jsm|" +

    48                           "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|");

    49 }

    51 /*

    52  * This test ensures that there are no unexpected

    53  * uninterruptible reflows when opening new windows.

    54  */

    55 function test() {

    56   waitForExplicitFinish();

    58   // Add a reflow observer and open a new window

    59   let win = OpenBrowserWindow();

    60   let docShell = win.QueryInterface(Ci.nsIInterfaceRequestor)

    61                     .getInterface(Ci.nsIWebNavigation)

    62                     .QueryInterface(Ci.nsIDocShell);

    63   docShell.addWeakReflowObserver(observer);

    65   // Wait until the mozafterpaint event occurs.

    66   waitForMozAfterPaint(win, function paintListener() {

    67     // Remove reflow observer and clean up.

    68     docShell.removeWeakReflowObserver(observer);

    69     win.close();

    71     finish();

    72   });

    73 }

    75 let observer = {

    76   reflow: function (start, end) {

    77     // Gather information about the current code path.

    78     let stack = new Error().stack;

    79     let path = stack.split("\n").slice(1).map(line => {

    80       return line.replace(/:\d+:\d+$/, "");

    81     }).join("|");

    82     let pathWithLineNumbers = (new Error().stack).split("\n").slice(1).join("|");

    84     // Stack trace is empty. Reflow was triggered by native code.

    85     if (path === "") {

    86       return;

    87     }

    89     // Check if this is an expected reflow.

    90     for (let expectedStack of EXPECTED_REFLOWS) {

    91       if (path.startsWith(expectedStack) ||

    92           // Accept an empty function name for gBrowserInit._delayedStartup or TabsInTitlebar._update to workaround bug 906578.

    93           path.startsWith(expectedStack.replace(/(^|\|)(gBrowserInit\._delayedStartup|TabsInTitlebar\._update)@/, "$1@"))) {

    94         ok(true, "expected uninterruptible reflow '" + expectedStack + "'");

    95         return;

    96       }

    97     }

    99     ok(false, "unexpected uninterruptible reflow '" + pathWithLineNumbers + "'");

   100   },

   102   reflowInterruptible: function (start, end) {

   103     // We're not interested in interruptible reflows.

   104   },

   106   QueryInterface: XPCOMUtils.generateQI([Ci.nsIReflowObserver,

   107                                          Ci.nsISupportsWeakReference])

   108 };

   110 function waitForMozAfterPaint(win, callback) {

   111   win.addEventListener("MozAfterPaint", function onEnd(event) {

   112     if (event.target != win)

   113       return;

   114     win.removeEventListener("MozAfterPaint", onEnd);

   115     executeSoon(callback);

   116   });

   117 }

The Tor Browser / file revision