The Tor Browser: browser/base/content/test/general/browser_tabopen_reflows.js@8bccb770b82d (annotated)

browser/base/content/test/general/browser_tabopen_reflows.js@8bccb770b82d (annotated)

browser/base/content/test/general/browser_tabopen_reflows.js

Wed, 31 Dec 2014 13:27:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 13:27:57 +0100
branch: TOR_BUG_3246
changeset 6: 8bccb770b82d
permissions: -rw-r--r--

Ignore runtime configuration files generated during quality assurance.

 /* Any copyright is dedicated to the Public Domain.
    http://creativecommons.org/publicdomain/zero/1.0/ */
 XPCOMUtils.defineLazyGetter(this, "docShell", () => {
   return window.QueryInterface(Ci.nsIInterfaceRequestor)
                .getInterface(Ci.nsIWebNavigation)
                .QueryInterface(Ci.nsIDocShell);
 });
 const EXPECTED_REFLOWS = [
   // tabbrowser.adjustTabstrip() call after tabopen animation has finished
   "adjustTabstrip@chrome://browser/content/tabbrowser.xml|" +
     "_handleNewTab@chrome://browser/content/tabbrowser.xml|" +
     "onxbltransitionend@chrome://browser/content/tabbrowser.xml|",
   // switching focus in updateCurrentBrowser() causes reflows
   "updateCurrentBrowser@chrome://browser/content/tabbrowser.xml|" +
     "onselect@chrome://browser/content/browser.xul|",
   // switching focus in openLinkIn() causes reflows
   "openLinkIn@chrome://browser/content/utilityOverlay.js|" +
     "openUILinkIn@chrome://browser/content/utilityOverlay.js|" +
     "BrowserOpenTab@chrome://browser/content/browser.js|",
   // accessing element.scrollPosition in _fillTrailingGap() flushes layout
   "get_scrollPosition@chrome://global/content/bindings/scrollbox.xml|" +
     "_fillTrailingGap@chrome://browser/content/tabbrowser.xml|" +
     "_handleNewTab@chrome://browser/content/tabbrowser.xml|" +
     "onxbltransitionend@chrome://browser/content/tabbrowser.xml|",
   // The TabView iframe causes reflows in the parent document.
   "iQClass_height@chrome://browser/content/tabview.js|" +
     "GroupItem_getContentBounds@chrome://browser/content/tabview.js|" +
     "GroupItem_shouldStack@chrome://browser/content/tabview.js|" +
     "GroupItem_arrange@chrome://browser/content/tabview.js|" +
     "GroupItem_add@chrome://browser/content/tabview.js|" +
     "GroupItems_newTab@chrome://browser/content/tabview.js|" +
     "TabItem__reconnect@chrome://browser/content/tabview.js|" +
     "TabItem@chrome://browser/content/tabview.js|" +
     "TabItems_link@chrome://browser/content/tabview.js|" +
     "TabItems_init/this._eventListeners.open@chrome://browser/content/tabview.js|",
   // SessionStore.getWindowDimensions()
   "ssi_getWindowDimension@resource:///modules/sessionstore/SessionStore.jsm|" +
     "ssi_updateWindowFeatures/<@resource:///modules/sessionstore/SessionStore.jsm|" +
     "ssi_updateWindowFeatures@resource:///modules/sessionstore/SessionStore.jsm|" +
     "ssi_collectWindowData@resource:///modules/sessionstore/SessionStore.jsm|",
   // tabPreviews.capture()
   "tabPreviews_capture@chrome://browser/content/browser.js|" +
     "tabPreviews_handleEvent/<@chrome://browser/content/browser.js|",
   // tabPreviews.capture()
   "tabPreviews_capture@chrome://browser/content/browser.js|" +
     "@chrome://browser/content/browser.js|"
 ];
 const PREF_PRELOAD = "browser.newtab.preload";
 const PREF_NEWTAB_DIRECTORYSOURCE = "browser.newtabpage.directorySource";
 /*
  * This test ensures that there are no unexpected
  * uninterruptible reflows when opening new tabs.
  */
 function test() {
   waitForExplicitFinish();
   Services.prefs.setBoolPref(PREF_PRELOAD, false);
   Services.prefs.setCharPref(PREF_NEWTAB_DIRECTORYSOURCE, "data:application/json,{}");
   registerCleanupFunction(() => {
     Services.prefs.clearUserPref(PREF_PRELOAD);
     Services.prefs.clearUserPref(PREF_NEWTAB_DIRECTORYSOURCE);
   });
   // Add a reflow observer and open a new tab.
   docShell.addWeakReflowObserver(observer);
   BrowserOpenTab();
   // Wait until the tabopen animation has finished.
   waitForTransitionEnd(function () {
     // Remove reflow observer and clean up.
     docShell.removeWeakReflowObserver(observer);
     gBrowser.removeCurrentTab();
     finish();
   });
 }
 let observer = {
   reflow: function (start, end) {
     // Gather information about the current code path.
     let path = (new Error().stack).split("\n").slice(1).map(line => {
       return line.replace(/:\d+:\d+$/, "");
     }).join("|");
     let pathWithLineNumbers = (new Error().stack).split("\n").slice(1).join("|");
     // Stack trace is empty. Reflow was triggered by native code.
     if (path === "") {
       return;
     }
     // Check if this is an expected reflow.
     for (let stack of EXPECTED_REFLOWS) {
       if (path.startsWith(stack)) {
         ok(true, "expected uninterruptible reflow '" + stack + "'");
         return;
       }
     }
     ok(false, "unexpected uninterruptible reflow '" + pathWithLineNumbers + "'");
   },
   reflowInterruptible: function (start, end) {
     // We're not interested in interruptible reflows.
   },
   QueryInterface: XPCOMUtils.generateQI([Ci.nsIReflowObserver,
                                          Ci.nsISupportsWeakReference])
 };
 function waitForTransitionEnd(callback) {
   let tab = gBrowser.selectedTab;
   tab.addEventListener("transitionend", function onEnd(event) {
     if (event.propertyName === "max-width") {
       tab.removeEventListener("transitionend", onEnd);
       executeSoon(callback);
     }
   });
 }