The Tor Browser / file comparison
comparison: browser/base/content/test/general/browser_windowopen_reflows.js
browser/base/content/test/general/browser_windowopen_reflows.js
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- 6474c204b198
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| 1 /* Any copyright is dedicated to the Public Domain. | |
| 2 http://creativecommons.org/publicdomain/zero/1.0/ */ | |
| 3 | |
| 4 "use strict"; | |
| 5 | |
| 6 const EXPECTED_REFLOWS = [ | |
| 7 // handleEvent flushes layout to get the tabstrip width after a resize. | |
| 8 "handleEvent@chrome://browser/content/tabbrowser.xml|", | |
| 9 | |
| 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|", | |
| 14 | |
| 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|", | |
| 19 | |
| 20 // Focusing the content area causes a reflow. | |
| 21 "gBrowserInit._delayedStartup@chrome://browser/content/browser.js|", | |
| 22 | |
| 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 ]; | |
| 27 | |
| 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 } | |
| 37 | |
| 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 } | |
| 50 | |
| 51 /* | |
| 52 * This test ensures that there are no unexpected | |
| 53 * uninterruptible reflows when opening new windows. | |
| 54 */ | |
| 55 function test() { | |
| 56 waitForExplicitFinish(); | |
| 57 | |
| 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); | |
| 64 | |
| 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(); | |
| 70 | |
| 71 finish(); | |
| 72 }); | |
| 73 } | |
| 74 | |
| 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("|"); | |
| 83 | |
| 84 // Stack trace is empty. Reflow was triggered by native code. | |
| 85 if (path === "") { | |
| 86 return; | |
| 87 } | |
| 88 | |
| 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 } | |
| 98 | |
| 99 ok(false, "unexpected uninterruptible reflow '" + pathWithLineNumbers + "'"); | |
| 100 }, | |
| 101 | |
| 102 reflowInterruptible: function (start, end) { | |
| 103 // We're not interested in interruptible reflows. | |
| 104 }, | |
| 105 | |
| 106 QueryInterface: XPCOMUtils.generateQI([Ci.nsIReflowObserver, | |
| 107 Ci.nsISupportsWeakReference]) | |
| 108 }; | |
| 109 | |
| 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 } |
