1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/browser/base/content/test/general/browser_tabopen_reflows.js Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,129 @@
1.4 +/* Any copyright is dedicated to the Public Domain.
1.5 + http://creativecommons.org/publicdomain/zero/1.0/ */
1.6 +
1.7 +XPCOMUtils.defineLazyGetter(this, "docShell", () => {
1.8 + return window.QueryInterface(Ci.nsIInterfaceRequestor)
1.9 + .getInterface(Ci.nsIWebNavigation)
1.10 + .QueryInterface(Ci.nsIDocShell);
1.11 +});
1.12 +
1.13 +const EXPECTED_REFLOWS = [
1.14 + // tabbrowser.adjustTabstrip() call after tabopen animation has finished
1.15 + "adjustTabstrip@chrome://browser/content/tabbrowser.xml|" +
1.16 + "_handleNewTab@chrome://browser/content/tabbrowser.xml|" +
1.17 + "onxbltransitionend@chrome://browser/content/tabbrowser.xml|",
1.18 +
1.19 + // switching focus in updateCurrentBrowser() causes reflows
1.20 + "updateCurrentBrowser@chrome://browser/content/tabbrowser.xml|" +
1.21 + "onselect@chrome://browser/content/browser.xul|",
1.22 +
1.23 + // switching focus in openLinkIn() causes reflows
1.24 + "openLinkIn@chrome://browser/content/utilityOverlay.js|" +
1.25 + "openUILinkIn@chrome://browser/content/utilityOverlay.js|" +
1.26 + "BrowserOpenTab@chrome://browser/content/browser.js|",
1.27 +
1.28 + // accessing element.scrollPosition in _fillTrailingGap() flushes layout
1.29 + "get_scrollPosition@chrome://global/content/bindings/scrollbox.xml|" +
1.30 + "_fillTrailingGap@chrome://browser/content/tabbrowser.xml|" +
1.31 + "_handleNewTab@chrome://browser/content/tabbrowser.xml|" +
1.32 + "onxbltransitionend@chrome://browser/content/tabbrowser.xml|",
1.33 +
1.34 + // The TabView iframe causes reflows in the parent document.
1.35 + "iQClass_height@chrome://browser/content/tabview.js|" +
1.36 + "GroupItem_getContentBounds@chrome://browser/content/tabview.js|" +
1.37 + "GroupItem_shouldStack@chrome://browser/content/tabview.js|" +
1.38 + "GroupItem_arrange@chrome://browser/content/tabview.js|" +
1.39 + "GroupItem_add@chrome://browser/content/tabview.js|" +
1.40 + "GroupItems_newTab@chrome://browser/content/tabview.js|" +
1.41 + "TabItem__reconnect@chrome://browser/content/tabview.js|" +
1.42 + "TabItem@chrome://browser/content/tabview.js|" +
1.43 + "TabItems_link@chrome://browser/content/tabview.js|" +
1.44 + "TabItems_init/this._eventListeners.open@chrome://browser/content/tabview.js|",
1.45 +
1.46 + // SessionStore.getWindowDimensions()
1.47 + "ssi_getWindowDimension@resource:///modules/sessionstore/SessionStore.jsm|" +
1.48 + "ssi_updateWindowFeatures/<@resource:///modules/sessionstore/SessionStore.jsm|" +
1.49 + "ssi_updateWindowFeatures@resource:///modules/sessionstore/SessionStore.jsm|" +
1.50 + "ssi_collectWindowData@resource:///modules/sessionstore/SessionStore.jsm|",
1.51 +
1.52 + // tabPreviews.capture()
1.53 + "tabPreviews_capture@chrome://browser/content/browser.js|" +
1.54 + "tabPreviews_handleEvent/<@chrome://browser/content/browser.js|",
1.55 +
1.56 + // tabPreviews.capture()
1.57 + "tabPreviews_capture@chrome://browser/content/browser.js|" +
1.58 + "@chrome://browser/content/browser.js|"
1.59 +];
1.60 +
1.61 +const PREF_PRELOAD = "browser.newtab.preload";
1.62 +const PREF_NEWTAB_DIRECTORYSOURCE = "browser.newtabpage.directorySource";
1.63 +
1.64 +/*
1.65 + * This test ensures that there are no unexpected
1.66 + * uninterruptible reflows when opening new tabs.
1.67 + */
1.68 +function test() {
1.69 + waitForExplicitFinish();
1.70 +
1.71 + Services.prefs.setBoolPref(PREF_PRELOAD, false);
1.72 + Services.prefs.setCharPref(PREF_NEWTAB_DIRECTORYSOURCE, "data:application/json,{}");
1.73 + registerCleanupFunction(() => {
1.74 + Services.prefs.clearUserPref(PREF_PRELOAD);
1.75 + Services.prefs.clearUserPref(PREF_NEWTAB_DIRECTORYSOURCE);
1.76 + });
1.77 +
1.78 + // Add a reflow observer and open a new tab.
1.79 + docShell.addWeakReflowObserver(observer);
1.80 + BrowserOpenTab();
1.81 +
1.82 + // Wait until the tabopen animation has finished.
1.83 + waitForTransitionEnd(function () {
1.84 + // Remove reflow observer and clean up.
1.85 + docShell.removeWeakReflowObserver(observer);
1.86 + gBrowser.removeCurrentTab();
1.87 +
1.88 + finish();
1.89 + });
1.90 +}
1.91 +
1.92 +let observer = {
1.93 + reflow: function (start, end) {
1.94 + // Gather information about the current code path.
1.95 + let path = (new Error().stack).split("\n").slice(1).map(line => {
1.96 + return line.replace(/:\d+:\d+$/, "");
1.97 + }).join("|");
1.98 + let pathWithLineNumbers = (new Error().stack).split("\n").slice(1).join("|");
1.99 +
1.100 + // Stack trace is empty. Reflow was triggered by native code.
1.101 + if (path === "") {
1.102 + return;
1.103 + }
1.104 +
1.105 + // Check if this is an expected reflow.
1.106 + for (let stack of EXPECTED_REFLOWS) {
1.107 + if (path.startsWith(stack)) {
1.108 + ok(true, "expected uninterruptible reflow '" + stack + "'");
1.109 + return;
1.110 + }
1.111 + }
1.112 +
1.113 + ok(false, "unexpected uninterruptible reflow '" + pathWithLineNumbers + "'");
1.114 + },
1.115 +
1.116 + reflowInterruptible: function (start, end) {
1.117 + // We're not interested in interruptible reflows.
1.118 + },
1.119 +
1.120 + QueryInterface: XPCOMUtils.generateQI([Ci.nsIReflowObserver,
1.121 + Ci.nsISupportsWeakReference])
1.122 +};
1.123 +
1.124 +function waitForTransitionEnd(callback) {
1.125 + let tab = gBrowser.selectedTab;
1.126 + tab.addEventListener("transitionend", function onEnd(event) {
1.127 + if (event.propertyName === "max-width") {
1.128 + tab.removeEventListener("transitionend", onEnd);
1.129 + executeSoon(callback);
1.130 + }
1.131 + });
1.132 +}
