The Tor Browser: dom/events/test/window_wheel_default_action.html@b8a032363ba2 (annotated)

dom/events/test/window_wheel_default_action.html@b8a032363ba2 (annotated)

dom/events/test/window_wheel_default_action.html

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 <!DOCTYPE HTML>
 <html>
 <head>
   <title>Test for default action of WheelEvent</title>
   <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
   <script type="application/javascript" src="/tests/SimpleTest/EventUtils.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
 </head>
 <body>
 <p id="display"></p>
 <div id="scrollable" style="overflow: auto; width: 200px; height: 200px;">
   <div id="clipper" style="margin: 0; padding: 0; overflow: hidden; width: 3000px; height: 3000px;">
     <div id="scrolled" style="width: 5000px; height: 5000px;">
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       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
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       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
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       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
       Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text. Tere is a lot of text.<br>
     </div>
   </div>
 </div>
 <div id="spacerForBody"></div>
 <div id="content" style="display: none">
 </div>
 <pre id="test">
 <script type="application/javascript">
 SimpleTest.waitForFocus(runTests, window);
 var winUtils = SpecialPowers.getDOMWindowUtils(window);
 // grab refresh driver
 winUtils.advanceTimeAndRefresh(100);
 var gScrollableElement = document.getElementById("scrollable");
 var gScrolledElement = document.getElementById("scrolled");
 var gSpacerForBodyElement = document.getElementById("spacerForBody");
 function is()
 {
   window.opener.is.apply(window.opener, arguments);
 }
 function ok()
 {
   window.opener.ok.apply(window.opener, arguments);
 }
 function hitEventLoop(aFunc, aTimes)
 {
   winUtils.advanceTimeAndRefresh(100);
   if (--aTimes) {
     setTimeout(hitEventLoop, 0, aFunc, aTimes);
   } else {
     setTimeout(aFunc, 20);
   }
 }
 function onZoomReset(aCallback) {
   var topic = "browser-fullZoom:zoomReset";
   SpecialPowers.addObserver(function observe() {
     SpecialPowers.removeObserver(observe, topic);
     SimpleTest.executeSoon(aCallback);
   }, topic, false);
 }
 function setDeltaMultiplierSettings(aSettings)
 {
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_x", aSettings.deltaMultiplierX * 100);
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_y", aSettings.deltaMultiplierY * 100);
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_z", aSettings.deltaMultiplierZ * 100);
   SpecialPowers.setIntPref("mousewheel.with_alt.delta_multiplier_x", aSettings.deltaMultiplierX * 100);
   SpecialPowers.setIntPref("mousewheel.with_alt.delta_multiplier_y", aSettings.deltaMultiplierY * 100);
   SpecialPowers.setIntPref("mousewheel.with_alt.delta_multiplier_z", aSettings.deltaMultiplierZ * 100);
   SpecialPowers.setIntPref("mousewheel.with_control.delta_multiplier_x", aSettings.deltaMultiplierX * 100);
   SpecialPowers.setIntPref("mousewheel.with_control.delta_multiplier_y", aSettings.deltaMultiplierY * 100);
   SpecialPowers.setIntPref("mousewheel.with_control.delta_multiplier_z", aSettings.deltaMultiplierZ * 100);
   SpecialPowers.setIntPref("mousewheel.with_meta.delta_multiplier_x", aSettings.deltaMultiplierX * 100);
   SpecialPowers.setIntPref("mousewheel.with_meta.delta_multiplier_y", aSettings.deltaMultiplierY * 100);
   SpecialPowers.setIntPref("mousewheel.with_meta.delta_multiplier_z", aSettings.deltaMultiplierZ * 100);
   SpecialPowers.setIntPref("mousewheel.with_shift.delta_multiplier_x", aSettings.deltaMultiplierX * 100);
   SpecialPowers.setIntPref("mousewheel.with_shift.delta_multiplier_y", aSettings.deltaMultiplierY * 100);
   SpecialPowers.setIntPref("mousewheel.with_shift.delta_multiplier_z", aSettings.deltaMultiplierZ * 100);
   SpecialPowers.setIntPref("mousewheel.with_win.delta_multiplier_x", aSettings.deltaMultiplierX * 100);
   SpecialPowers.setIntPref("mousewheel.with_win.delta_multiplier_y", aSettings.deltaMultiplierY * 100);
   SpecialPowers.setIntPref("mousewheel.with_win.delta_multiplier_z", aSettings.deltaMultiplierZ * 100);
 }
 function doTestScroll(aSettings, aCallback)
 {
   const kNoScroll    = 0x00;
   const kScrollUp    = 0x01;
   const kScrollDown  = 0x02;
   const kScrollLeft  = 0x04;
   const kScrollRight = 0x08;
   const kTests = [
     { description: "Scroll to bottom by pixel scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to bottom by pixel scroll when lineOrPageDelta is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to top by pixel scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to top by pixel scroll when lineOrPageDelta is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to right by pixel scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to right by pixel scroll when lineOrPageDelta is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to left by pixel scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to left by pixel scroll when lineOrPageDelta is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to bottom-right by pixel scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollRight },
     { description: "Scroll to bottom-left by pixel scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollLeft },
     { description: "Scroll to top-left by pixel scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollLeft },
     { description: "Scroll to top-right by pixel scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollRight },
     { description: "Not Scroll by pixel scroll for z",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Scroll to bottom by line scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to bottom by line scroll when lineOrPageDelta is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to top by line scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to top by line scroll when lineOrPageDelta is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to right by line scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to right by line scroll when lineOrPageDelta is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to left by line scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to left by line scroll when lineOrPageDelta is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to bottom-right by line scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollRight },
     { description: "Scroll to bottom-left by line scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -0.5, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollLeft },
     { description: "Scroll to top-left by line scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -0.5, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollLeft },
     { description: "Scroll to top-right by line scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollRight },
     { description: "Not Scroll by line scroll for z",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Scroll to bottom by page scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to bottom by page scroll when lineOrPageDelta is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to top by page scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to top by page scroll when lineOrPageDelta is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to right by page scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to right by page scroll when lineOrPageDelta is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to left by page scroll even if lineOrPageDelta is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to left by page scroll when lineOrPageDelta is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to bottom-right by page scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.5, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollRight },
     { description: "Scroll to bottom-left by page scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -0.5, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollLeft },
     { description: "Scroll to top-left by page scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -0.5, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollLeft },
     { description: "Scroll to top-right by page scroll",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.5, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollRight },
     { description: "Not Scroll by page scroll for z",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: false,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     // special cases.
     // momentum scroll should cause scroll even if the action is zoom, but if the default action is none,
     // shouldn't do it.
     { description: "Scroll to bottom by momentum pixel scroll when lineOrPageDelta is 0, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to bottom by momentum pixel scroll when lineOrPageDelta is 1, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to top by momentum pixel scroll when lineOrPageDelta is 0, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to top by momentum pixel scroll when lineOrPageDelta is -1, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to right by momentum pixel scroll when lineOrPageDelta is 0, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to right by momentum pixel scroll when lineOrPageDelta is 1, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to left by momentum pixel scroll when lineOrPageDelta is 0, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to left by momentum pixel scroll when lineOrPageDelta is -1, even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to bottom-right by momentum pixel scroll even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollRight },
     { description: "Scroll to bottom-left by momentum pixel scroll even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollLeft },
     { description: "Scroll to top-left by momentum pixel scroll even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollLeft },
     { description: "Scroll to top-right by momentum pixel scroll even if the action is zoom",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollRight },
     { description: "Not Scroll by momentum pixel scroll for z (action is zoom)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Not Scroll by momentum pixel scroll if default action is none (action is zoom)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: true, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll,
       prepare: function () { SpecialPowers.setIntPref("mousewheel.default.action", 0); },
       cleanup: function () { SpecialPowers.setIntPref("mousewheel.default.action", 1); } },
     // momentum scroll should cause scroll even if the action is history, but if the default action is none,
     // shouldn't do it.
     { description: "Scroll to bottom by momentum pixel scroll when lineOrPageDelta is 0, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to bottom by momentum pixel scroll when lineOrPageDelta is 1, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to top by momentum pixel scroll when lineOrPageDelta is 0, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to top by momentum pixel scroll when lineOrPageDelta is -1, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to right by momentum pixel scroll when lineOrPageDelta is 0, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to right by momentum pixel scroll when lineOrPageDelta is 1, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to left by momentum pixel scroll when lineOrPageDelta is 0, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to left by momentum pixel scroll when lineOrPageDelta is -1, even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to bottom-right by momentum pixel scroll even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollRight },
     { description: "Scroll to bottom-left by momentum pixel scroll even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown | kScrollLeft },
     { description: "Scroll to top-left by momentum pixel scroll even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollLeft },
     { description: "Scroll to top-right by momentum pixel scroll even if the action is history",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp | kScrollRight },
     { description: "Not Scroll by momentum pixel scroll for z (action is history)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Not Scroll by momentum pixel scroll if default action is none (action is history)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0, isMomentum: true,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: true, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll,
       prepare: function () { SpecialPowers.setIntPref("mousewheel.default.action", 0); },
       cleanup: function () { SpecialPowers.setIntPref("mousewheel.default.action", 1); } },
     // Don't scroll along axis whose overflow style is hidden.
     { description: "Scroll to only bottom by oblique pixel wheel event with overflow-x: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 16.0, deltaY: 16.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 1, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown,
       prepare: function() { gScrollableElement.style.overflowX = "hidden"; } },
     { description: "Scroll to only bottom by oblique line wheel event with overflow-x: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 1, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to only bottom by oblique page wheel event with overflow-x: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 1, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to only top by oblique pixel wheel event with overflow-x: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -16.0, deltaY: -16.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: -1, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to only top by oblique line wheel event with overflow-x: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: -1, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to only top by oblique page wheel event with overflow-x: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: -1, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp,
       cleanup: function () { gScrollableElement.style.overflowX = "auto"; } },
     { description: "Scroll to only right by oblique pixel wheel event with overflow-y: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 16.0, deltaY: 16.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight,
       prepare: function() { gScrollableElement.style.overflowY = "hidden"; } },
     { description: "Scroll to only right by oblique line wheel event with overflow-y: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to only right by oblique page wheel event with overflow-y: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to only left by oblique pixel wheel event with overflow-y: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -16.0, deltaY: -16.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: -1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to only top by oblique line wheel event with overflow-y: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: -1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to only top by oblique page wheel event with overflow-y: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: -1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft,
       cleanup: function () { gScrollableElement.style.overflowY = "auto"; } },
     { description: "Don't be scrolled by oblique pixel wheel event with overflow: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 16.0, deltaY: 16.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 1, expectedOverflowDeltaY: 1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll,
       prepare: function() { gScrollableElement.style.overflow = "hidden"; } },
     { description: "Don't be scrolled by oblique line wheel event with overflow: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 1, expectedOverflowDeltaY: 1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Don't be scrolled by oblique page wheel event with overflow: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 1, expectedOverflowDeltaY: 1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Don't be scrolled by oblique pixel wheel event with overflow: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -16.0, deltaY: -16.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: -1, expectedOverflowDeltaY: -1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Don't be scrolled by oblique line wheel event with overflow: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: -1, expectedOverflowDeltaY: -1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll },
     { description: "Don't be scrolled by oblique page wheel event with overflow: hidden",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: -1, expectedOverflowDeltaY: -1,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kNoScroll,
       cleanup: function () { gScrollableElement.style.overflow = "auto"; } },
     // Don't scroll along axis whose overflow style is hidden and overflow delta values should
     // be zero if there is ancestor scrollable element.
     { description: "Scroll to only bottom by oblique pixel wheel event with overflow-x: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 16.0, deltaY: 16.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown,
       prepare: function() {
         gScrollableElement.style.overflowX = "hidden";
         gScrollableElement.style.position = "fixed";
         gScrollableElement.style.top = "30px";
         gScrollableElement.style.left = "30px";
         // Make body element scrollable.
         gSpacerForBodyElement.style.width = "5000px";
         gSpacerForBodyElement.style.height = "5000px";
         document.documentElement.scrollTop = 500;
         document.documentElement.scrollLeft = 500;
       } },
     { description: "Scroll to only bottom by oblique line wheel event with overflow-x: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to only bottom by oblique page wheel event with overflow-x: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollDown },
     { description: "Scroll to only top by oblique pixel wheel event with overflow-x: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -16.0, deltaY: -16.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to only top by oblique line wheel event with overflow-x: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp },
     { description: "Scroll to only top by oblique page wheel event with overflow-x: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollUp,
       cleanup: function () { gScrollableElement.style.overflowX = "auto"; } },
     { description: "Scroll to only right by oblique pixel wheel event with overflow-y: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 16.0, deltaY: 16.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight,
       prepare: function() { gScrollableElement.style.overflowY = "hidden"; } },
     { description: "Scroll to only right by oblique line wheel event with overflow-y: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to only right by oblique page wheel event with overflow-y: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 1.0, deltaY: 1.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollRight },
     { description: "Scroll to only left by oblique pixel wheel event with overflow-y: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -16.0, deltaY: -16.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to only top by oblique line wheel event with overflow-y: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft },
     { description: "Scroll to only top by oblique page wheel event with overflow-y: hidden (body is scrollable)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -1.0, deltaY: -1.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0,
                shiftKey: false, ctrlKey: false, altKey: false, metaKey: false, osKey: false },
       expected: kScrollLeft,
       cleanup: function () {
         gScrollableElement.style.overflowY = "auto";
         gScrollableElement.style.position = "static";
         gSpacerForBodyElement.style.width = "";
         gSpacerForBodyElement.style.height = "";
       } },
   ];
   var description;
   var currentTestIndex = -1;
   var isXReverted = (aSettings.deltaMultiplierX < 0);
   var isYReverted = (aSettings.deltaMultiplierY < 0);
   function doNextTest()
   {
     if (++currentTestIndex >= kTests.length) {
       SimpleTest.executeSoon(aCallback);
       return;
     }
     gScrollableElement.scrollTop = 1000;
     gScrollableElement.scrollLeft = 1000;
     var currentTest = kTests[currentTestIndex];
     description = "doTestScroll(aSettings=" + aSettings.description + "), " + currentTest.description + ": ";
     if (currentTest.prepare) {
       currentTest.prepare();
     }
     synthesizeWheel(gScrollableElement, 10, 10, currentTest.event);
     hitEventLoop(function () {
       if (currentTest.expected == kNoScroll) {
         is(gScrollableElement.scrollTop, 1000, description + "scrolled vertical");
         is(gScrollableElement.scrollLeft, 1000, description + "scrolled horizontal");
       } else {
         var scrollUp = !isYReverted ? (currentTest.expected & kScrollUp) :
                                       (currentTest.expected & kScrollDown);
         var scrollDown = !isYReverted ? (currentTest.expected & kScrollDown) :
                                         (currentTest.expected & kScrollUp);
         if (scrollUp) {
           ok(gScrollableElement.scrollTop < 1000, description + "not scrolled up, got " + gScrollableElement.scrollTop);
         } else if (scrollDown) {
           ok(gScrollableElement.scrollTop > 1000, description + "not scrolled down, got " + gScrollableElement.scrollTop);
         } else {
           is(gScrollableElement.scrollTop, 1000, description + "scrolled vertical");
         }
         var scrollLeft = !isXReverted ? (currentTest.expected & kScrollLeft) :
                                         (currentTest.expected & kScrollRight);
         var scrollRight = !isXReverted ? (currentTest.expected & kScrollRight) :
                                          (currentTest.expected & kScrollLeft);
         if (scrollLeft) {
           ok(gScrollableElement.scrollLeft < 1000, description + "not scrolled to left, got " + gScrollableElement.scrollLeft);
         } else if (scrollRight) {
           ok(gScrollableElement.scrollLeft > 1000, description + "not scrolled to right, got " + gScrollableElement.scrollLeft);
         } else {
           is(gScrollableElement.scrollLeft, 1000, description + "scrolled horizontal");
         }
       }
       if (currentTest.cleanup) {
         currentTest.cleanup();
       }
       winUtils.advanceTimeAndRefresh(100);
       doNextTest();
     }, 10);
   }
   doNextTest();
 }
 function doTestZoom(aSettings, aCallback)
 {
   if ((aSettings.deltaMultiplierX != 1.0  && aSettings.deltaMultiplierX != -1.0) ||
       (aSettings.deltaMultiplierY != 1.0  && aSettings.deltaMultiplierY != -1.0)) {
     todo(false, "doTestZoom doesn't support to test with aSettings=" + aSettings.description);
     SimpleTest.executeSoon(aCallback);
     return;
   }
   const kNone     = 0x00;
   const kPositive = 0x01;
   const kNegative = 0x02;
   const kUseX     = 0x10;
   const kUseY     = 0x20;
   const kTests = [
     { description: "by vertical/positive pixel event when its lineOrPageDeltaY is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/positive pixel event when its lineOrPageDeltaY is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kPositive | kUseY },
     { description: "by vertical/negative pixel event when its lineOrPageDeltaY is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/negative pixel event when its lineOrPageDeltaY is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -8.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNegative | kUseY },
     { description: "by horizotal/positive pixel event when its lineOrPageDeltaX is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by horizotal/positive pixel event when its lineOrPageDeltaX is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kPositive | kUseX },
     { description: "by horizotal/negative pixel event when its lineOrPageDeltaX is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by horizotal/negative pixel event when its lineOrPageDeltaX is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -8.0, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNegative | kUseX },
     { description: "by z pixel event",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 16.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/positive line event when its lineOrPageDeltaY is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/positive line event when its lineOrPageDeltaY is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kPositive | kUseY },
     { description: "by vertical/negative line event when its lineOrPageDeltaY is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/negative line event when its lineOrPageDeltaY is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNegative | kUseY },
     { description: "by horizotal/positive line event when its lineOrPageDeltaX is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by horizotal/positive line event when its lineOrPageDeltaX is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kPositive | kUseX },
     { description: "by horizotal/negative line event when its lineOrPageDeltaX is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by horizotal/negative line event when its lineOrPageDeltaX is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNegative | kUseX },
     { description: "by z line event",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/positive page event when its lineOrPageDeltaY is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/positive page event when its lineOrPageDeltaY is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: 0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kPositive | kUseY },
     { description: "by vertical/negative page event when its lineOrPageDeltaY is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by vertical/negative page event when its lineOrPageDeltaY is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: -0.5, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNegative | kUseY },
     { description: "by horizotal/positive page event when its lineOrPageDeltaX is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by horizotal/positive page event when its lineOrPageDeltaX is 1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kPositive | kUseX },
     { description: "by horizotal/negative page event when its lineOrPageDeltaX is 0",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
     { description: "by horizotal/negative page event when its lineOrPageDeltaX is -1",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -0.5, deltaY: 0.0, deltaZ: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNegative | kUseX },
     { description: "by z page event",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: 0.0, deltaZ: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0,
                expectedOverflowDeltaX: 0, expectedOverflowDeltaY: 0 },
       expected: kNone },
   ];
   var description, currentTest;
   var currentTestIndex = -1;
   var isXReverted = (aSettings.deltaMultiplierX < 0);
   var isYReverted = (aSettings.deltaMultiplierY < 0);
   function doNextTest()
   {
     if (++currentTestIndex >= kTests.length) {
       SimpleTest.executeSoon(aCallback);
       return;
     }
     gScrollableElement.scrollTop = 1000;
     gScrollableElement.scrollLeft = 1000;
     currentTest = kTests[currentTestIndex];
     description = "doTestZoom(aSettings=" + aSettings.description + "), ";
     if (currentTest.expected == kNone) {
       description += "Shouldn't ";
     } else {
       description += "Should ";
     }
     description += "zoom " + currentTest.description + ": ";
     var event = currentTest.event;
     event.ctrlKey  = true;
     synthesizeWheel(gScrollableElement, 10, 10, event);
     // NOTE: Zooming might change scrollTop and scrollLeft by rounding fraction.
     //       This test assume that zoom happens synchronously and scrolling
     //       happens asynchronously.
     var scrollTop = gScrollableElement.scrollTop;
     var scrollLeft = gScrollableElement.scrollLeft;
     hitEventLoop(function () {
       is(gScrollableElement.scrollTop, scrollTop, description + "scrolled vertical");
       is(gScrollableElement.scrollLeft, scrollLeft, description + "scrolled horizontal");
       if (!(currentTest.expected & (kNegative | kPositive))) {
         is(SpecialPowers.getFullZoom(window), 1.0, description + "zoomed");
       } else {
         var isReverted = (currentTest.expected & kUseX) ? isXReverted :
                          (currentTest.expected & kUseY) ? isYReverted : false;
         if ((!isReverted && (currentTest.expected & kNegative)) ||
             (isReverted && (currentTest.expected & kPositive))) {
           ok(SpecialPowers.getFullZoom(window) > 1.0,
              description + "not zoomed in, got " + SpecialPowers.getFullZoom(window));
         } else {
           ok(SpecialPowers.getFullZoom(window) < 1.0,
              description + "not zoomed out, got " + SpecialPowers.getFullZoom(window));
         }
       }
       synthesizeKey("0", { accelKey: true });
       onZoomReset(function () {
         hitEventLoop(doNextTest, 20);
       });
     }, 20);
   }
   doNextTest();
 }
 function doTestZoomedScroll(aCallback)
 {
   var zoom = 1.0;
   function setFullZoom(aWindow, aZoom)
   {
     zoom = aZoom;
     SpecialPowers.setFullZoom(aWindow, aZoom);
   }
   function prepareTestZoomedPixelScroll()
   {
     // Reset zoom and store the scroll amount into the data.
     synthesizeKey("0", { accelKey: true });
     zoom = 1.0;
     onZoomReset(testZoomedPixelScroll);
   }
   function testZoomedPixelScroll()
   {
     gScrollableElement.scrollTop = 1000;
     gScrollableElement.scrollLeft = 1000;
     // Ensure not to be in reflow.
     hitEventLoop(function () {
       function mousePixelScrollHandler(aEvent)
       {
         if (aEvent.axis == MouseScrollEvent.HORIZONTAL_AXIS) {
           is(aEvent.detail, 16,
              "doTestZoomedScroll: The detail of horizontal MozMousePixelScroll for pixel wheel event is wrong");
         } else if (aEvent.axis == MouseScrollEvent.VERTICAL_AXIS) {
           is(aEvent.detail, 16,
              "doTestZoomedScroll: The detail of vertical MozMousePixelScroll for pixel wheel event is wrong");
         } else {
           ok(false, "doTestZoomedScroll: The axis of MozMousePixelScroll for pixel wheel event is invalid, got " + aEvent.axis);
         }
       }
       function wheelHandler(aEvent)
       {
         is(aEvent.deltaX, 16.0 / zoom,
            "doTestZoomedScroll: The deltaX of wheel for pixel is wrong");
         is(aEvent.deltaY, 16.0 / zoom,
            "doTestZoomedScroll: The deltaY of wheel for pixel is wrong");
       }
       window.addEventListener("MozMousePixelScroll", mousePixelScrollHandler, true);
       window.addEventListener("wheel", wheelHandler, true);
       synthesizeWheel(gScrollableElement, 10, 10,
         { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
           deltaX: 16.0, deltaY: 16.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 });
       // wait scrolled actually.
       hitEventLoop(function () {
         var scrolledX = gScrollableElement.scrollLeft;
         var scrolledY = gScrollableElement.scrollTop;
         ok(scrolledX > 1000,
            "doTestZoomedScroll: scrolledX must be larger than 1000 for pixel wheel event, got " + scrolledX);
         ok(scrolledY > 1000,
            "doTestZoomedScroll: scrolledY must be larger than 1000 for pixel wheel event, got " + scrolledY);
         // Zoom
         setFullZoom(window, 2.0);
         // Ensure not to be in reflow.
         hitEventLoop(function () {
           gScrollableElement.scrollTop = 1000;
           gScrollableElement.scrollLeft = 1000;
           synthesizeWheel(gScrollableElement, 10, 10,
             { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
               deltaX: 16.0, deltaY: 16.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 });
           // wait scrolled actually.
           hitEventLoop(function () {
             ok(Math.abs(gScrollableElement.scrollLeft - (1000 + (scrolledX - 1000) / 2)) <= 1,
                "doTestZoomedScroll: zoomed horizontal scroll amount by pixel wheel event is different from normal, scrollLeft=" +
                  gScrollableElement.scrollLeft + ", scrolledX=" + scrolledX);
             ok(Math.abs(gScrollableElement.scrollTop - (1000 + (scrolledY - 1000) / 2)) <= 1,
                "doTestZoomedScroll: zoomed vertical scroll amount by pixel wheel event is different from normal, scrollTop=" +
                  gScrollableElement.scrollTop + ", scrolledY=" + scrolledY);
             window.removeEventListener("MozMousePixelScroll", mousePixelScrollHandler, true);
             window.removeEventListener("wheel", wheelHandler, true);
             synthesizeKey("0", { accelKey: true });
             onZoomReset(prepareTestZoomedLineScroll);
           }, 20);
         }, 20);
       }, 20);
     }, 20);
   }
   function prepareTestZoomedLineScroll()
   {
     // Reset zoom and store the scroll amount into the data.
     synthesizeKey("0", { accelKey: true });
     zoom = 1.0;
     onZoomReset(testZoomedLineScroll);
   }
   function testZoomedLineScroll()
   {
     gScrollableElement.scrollTop = 1000;
     gScrollableElement.scrollLeft = 1000;
     // Ensure not to be in reflow.
     hitEventLoop(function () {
       var lineHeightX, lineHeightY;
       function handler(aEvent)
       {
         if (aEvent.axis == MouseScrollEvent.HORIZONTAL_AXIS) {
           if (lineHeightX == undefined) {
             lineHeightX = aEvent.detail;
           } else {
             ok(Math.abs(aEvent.detail - lineHeightX) <= 1,
                "doTestZoomedScroll: The detail of horizontal MozMousePixelScroll for line wheel event is wrong, aEvent.detail=" +
                  aEvent.detail + ", lineHeightX=" + lineHeightX);
           }
         } else if (aEvent.axis == MouseScrollEvent.VERTICAL_AXIS) {
           if (lineHeightY == undefined) {
             lineHeightY = aEvent.detail;
           } else {
             ok(Math.abs(aEvent.detail - lineHeightY) <= 1,
                "doTestZoomedScroll: The detail of vertical MozMousePixelScroll for line wheel event is wrong, aEvent.detail=" +
                  aEvent.detail + ", lineHeightY=" + lineHeightY);
           }
         } else {
           ok(false, "doTestZoomedScroll: The axis of MozMousePixelScroll for line wheel event is invalid, got " + aEvent.axis);
         }
       }
       window.addEventListener("MozMousePixelScroll", handler, true);
       synthesizeWheel(gScrollableElement, 10, 10,
         { deltaMode: WheelEvent.DOM_DELTA_LINE,
           deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 });
       // wait scrolled actually.
       hitEventLoop(function () {
         var scrolledX = gScrollableElement.scrollLeft;
         var scrolledY = gScrollableElement.scrollTop;
         ok(scrolledX > 1000,
            "doTestZoomedScroll: scrolledX must be larger than 1000 for line wheel event, got " + scrolledX);
         ok(scrolledY > 1000,
            "doTestZoomedScroll: scrolledY must be larger than 1000 for line wheel event, got " + scrolledY);
         // Zoom
         setFullZoom(window, 2.0);
         // Ensure not to be in reflow.
         hitEventLoop(function () {
           gScrollableElement.scrollTop = 1000;
           gScrollableElement.scrollLeft = 1000;
           synthesizeWheel(gScrollableElement, 10, 10,
             { deltaMode: WheelEvent.DOM_DELTA_LINE,
               deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 });
           // wait scrolled actually.
           hitEventLoop(function () {
             ok(Math.abs(gScrollableElement.scrollLeft - scrolledX) <= 1,
                "doTestZoomedScroll: zoomed horizontal scroll amount by line wheel event is different from normal, scrollLeft=" +
                  gScrollableElement.scrollLeft + ", scrolledX=" + scrolledX);
             ok(Math.abs(gScrollableElement.scrollTop - scrolledY) <= 1,
                "doTestZoomedScroll: zoomed vertical scroll amount by line wheel event is different from normal, scrollTop=" +
                  gScrollableElement.scrollTop + ", scrolledY=" + scrolledY);
             window.removeEventListener("MozMousePixelScroll", handler, true);
             synthesizeKey("0", { accelKey: true });
             onZoomReset(aCallback);
           }, 20);
         }, 20);
       }, 20);
     }, 20);
   }
   // XXX It's too difficult to test page scroll because the page scroll amount
   //     is computed by complex logic.
   prepareTestZoomedPixelScroll();
 }
 function doTestWholeScroll(aCallback)
 {
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_x", 99999999);
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_y", 99999999);
   const kTests = [
     { description: "try whole-scroll to top (line)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: -1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       expectedScrollTop: 0,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to top when scrollTop is already top-most (line)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: -1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       expectedScrollTop: 0,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to bottom (line)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.0, deltaY: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       expectedScrollTop: gScrollableElement.scrollTopMax,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to bottom when scrollTop is already bottom-most (line)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0, deltaY: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       expectedScrollTop: gScrollableElement.scrollTopMax,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to left (line)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -1.0, deltaY: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: 0
     },
     { description: "try whole-scroll to left when scrollLeft is already left-most (line)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: -1.0, deltaY: 0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: 0
     },
     { description: "try whole-scroll to right (line)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: gScrollableElement.scrollLeftMax
     },
     { description: "try whole-scroll to right when scrollLeft is already right-most (line)",
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: gScrollableElement.scrollLeftMax
     },
     { description: "try whole-scroll to top (pixel)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: 0,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to top when scrollTop is already top-most (pixel)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: -1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: 0,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to bottom (pixel)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0.0, deltaY: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: gScrollableElement.scrollTopMax,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to bottom when scrollTop is already bottom-most (pixel)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 0, deltaY: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: gScrollableElement.scrollTopMax,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to left (pixel)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -1.0, deltaY: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: 0
     },
     { description: "try whole-scroll to left when scrollLeft is already left-most (pixel)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: -1.0, deltaY: 0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: 0
     },
     { description: "try whole-scroll to right (pixel)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 1.0, deltaY: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: gScrollableElement.scrollLeftMax
     },
     { description: "try whole-scroll to right when scrollLeft is already right-most (pixel)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PIXEL,
                deltaX: 1.0, deltaY: 0.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: gScrollableElement.scrollLeftMax
     },
     { description: "try whole-scroll to top (page)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: -1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       expectedScrollTop: 0,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to top when scrollTop is already top-most (page)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: -1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       expectedScrollTop: 0,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to bottom (page)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0.0, deltaY: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       expectedScrollTop: gScrollableElement.scrollTopMax,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to bottom when scrollTop is already bottom-most (page)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 0, deltaY: 1.0,
                lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       expectedScrollTop: gScrollableElement.scrollTopMax,
       expectedScrollLeft: 1000
     },
     { description: "try whole-scroll to left (page)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -1.0, deltaY: 0.0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: 0
     },
     { description: "try whole-scroll to left when scrollLeft is already left-most (page)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: -1.0, deltaY: 0,
                lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: 0
     },
     { description: "try whole-scroll to right (page)",
       prepare: function () {
         gScrollableElement.scrollTop = 1000;
         gScrollableElement.scrollLeft = 1000;
       },
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 1.0, deltaY: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: gScrollableElement.scrollLeftMax
     },
     { description: "try whole-scroll to right when scrollLeft is already right-most (page)",
       event: { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                deltaX: 1.0, deltaY: 0.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       expectedScrollTop: 1000,
       expectedScrollLeft: gScrollableElement.scrollLeftMax
     },
   ];
   var index = 0;
   function doIt()
   {
     const kTest = kTests[index];
     if (kTest.prepare) {
       kTest.prepare();
     }
     synthesizeWheel(gScrollableElement, 10, 10, kTest.event);
     hitEventLoop(function () {
       is(gScrollableElement.scrollTop, kTest.expectedScrollTop,
          "doTestWholeScroll, " + kTest.description + ": unexpected scrollTop");
       is(gScrollableElement.scrollLeft, kTest.expectedScrollLeft,
          "doTestWholeScroll, " + kTest.description + ": unexpected scrollLeft");
       if (++index == kTests.length) {
         SpecialPowers.clearUserPref("mousewheel.default.delta_multiplier_x");
         SpecialPowers.clearUserPref("mousewheel.default.delta_multiplier_y");
         SpecialPowers.clearUserPref("mousewheel.default.delta_multiplier_z");
         SimpleTest.executeSoon(aCallback);
       } else {
         doIt();
       }
     }, 20);
   }
   doIt();
 }
 function doTestActionOverride(aCallback)
 {
   const kNoScroll    = 0x00;
   const kScrollUp    = 0x01;
   const kScrollDown  = 0x02;
   const kScrollLeft  = 0x04;
   const kScrollRight = 0x08;
   const kTests = [
     { action: 1, override_x: -1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 1, override_x: 0,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 1, override_x: 1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 0, override_x: -1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 0, override_x: 0,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 0, override_x: 1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 1, override_x: -1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.5,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 1, override_x: 0,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.5,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 1, override_x: 1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.5,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 0, override_x: -1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.5,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 0, override_x: 0,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.5,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 0, override_x: 1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 1.0, deltaY: 0.5,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 1, override_x: -1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 1, override_x: 0,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 1, override_x: 1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kScrollDown | kScrollRight
     },
     { action: 0, override_x: -1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 0, override_x: 0,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
     { action: 0, override_x: 1,
       event: { deltaMode: WheelEvent.DOM_DELTA_LINE,
                deltaX: 0.5, deltaY: 1.0,
                lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       expected: kNoScroll
     },
   ];
   var index = 0;
   function doIt()
   {
     const kTest = kTests[index];
     description = "doTestActionOverride(action=" + kTest.action + ", " +
                   "override_x=" + kTest.override_x + ", " +
                   "deltaX=" + kTest.event.deltaX + ", " +
                   "deltaY=" + kTest.event.deltaY + "): ";
     SpecialPowers.setIntPref("mousewheel.default.action", kTest.action);
     SpecialPowers.setIntPref("mousewheel.default.action.override_x", kTest.override_x);
     gScrollableElement.scrollTop = 1000;
     gScrollableElement.scrollLeft = 1000;
     synthesizeWheel(gScrollableElement, 10, 10, kTest.event);
     hitEventLoop(function () {
       if (kTest.expected & kScrollUp) {
         ok(gScrollableElement.scrollTop < 1000, description + "not scrolled up, got " + gScrollableElement.scrollTop);
       } else if (kTest.expected & kScrollDown) {
         ok(gScrollableElement.scrollTop > 1000, description + "not scrolled down, got " + gScrollableElement.scrollTop);
       } else {
         is(gScrollableElement.scrollTop, 1000, description + "scrolled vertical");
       }
       if (kTest.expected & kScrollLeft) {
         ok(gScrollableElement.scrollLeft < 1000, description + "not scrolled to left, got " + gScrollableElement.scrollLeft);
       } else if (kTest.expected & kScrollRight) {
         ok(gScrollableElement.scrollLeft > 1000, description + "not scrolled to right, got " + gScrollableElement.scrollLeft);
       } else {
         is(gScrollableElement.scrollLeft, 1000, description + "scrolled horizontal");
       }
       if (++index == kTests.length) {
         SpecialPowers.setIntPref("mousewheel.default.action", 1);
         SpecialPowers.setIntPref("mousewheel.default.action.override_x", -1);
         SimpleTest.executeSoon(aCallback);
       } else {
         doIt();
       }
     }, 20);
   }
   doIt();
 }
 function runTests()
 {
   SpecialPowers.setBoolPref("general.smoothScroll", false);
   SpecialPowers.setIntPref("mousewheel.default.action", 1);      // scroll
   SpecialPowers.setIntPref("mousewheel.default.action.override_x", -1);
   SpecialPowers.setIntPref("mousewheel.with_shift.action", 2);   // history
   SpecialPowers.setIntPref("mousewheel.with_shift.action.override_x", -1);
   SpecialPowers.setIntPref("mousewheel.with_control.action", 3); // zoom
   SpecialPowers.setIntPref("mousewheel.with_control.action.override_x", -1);
   const kSettings = [
     { description: "all delta values are not customized",
       deltaMultiplierX:  1.0, deltaMultiplierY:  1.0, deltaMultiplierZ:  1.0 },
     { description: "deltaX is reverted",
       deltaMultiplierX: -1.0, deltaMultiplierY:  1.0, deltaMultiplierZ:  1.0 },
     { description: "deltaY is reverted",
       deltaMultiplierX:  1.0, deltaMultiplierY: -1.0, deltaMultiplierZ:  1.0 },
     { description: "deltaZ is reverted",
       deltaMultiplierX:  1.0, deltaMultiplierY:  1.0, deltaMultiplierZ: -1.0 },
     { description: "deltaX is 2.0",
       deltaMultiplierX:  2.0, deltaMultiplierY:  1.0, deltaMultiplierZ:  1.0 },
     { description: "deltaY is 2.0",
       deltaMultiplierX:  1.0, deltaMultiplierY:  2.0, deltaMultiplierZ:  1.0 },
     { description: "deltaZ is 2.0",
       deltaMultiplierX:  1.0, deltaMultiplierY:  1.0, deltaMultiplierZ:  2.0 },
     { description: "deltaX is -2.0",
       deltaMultiplierX: -2.0, deltaMultiplierY:  1.0, deltaMultiplierZ:  1.0 },
     { description: "deltaY is -2.0",
       deltaMultiplierX:  1.0, deltaMultiplierY: -2.0, deltaMultiplierZ:  1.0 },
     { description: "deltaZ is -2.0",
       deltaMultiplierX:  1.0, deltaMultiplierY:  1.0, deltaMultiplierZ: -2.0 },
   ];
   var index = 0;
   function doTest() {
     setDeltaMultiplierSettings(kSettings[index]);
     doTestScroll(kSettings[index], function () {
       doTestZoom(kSettings[index], function() {
         if (++index == kSettings.length) {
           setDeltaMultiplierSettings(kSettings[0]);
           doTestZoomedScroll(function() {
             doTestWholeScroll(function() {
               doTestActionOverride(function() {
                 finishTests();
               });
             });
           });
         } else {
           doTest();
         }
       });
     });
   }
   doTest();
 }
 function finishTests()
 {
   SpecialPowers.clearUserPref("general.smoothScroll");
   SpecialPowers.clearUserPref("mousewheel.default.action");
   SpecialPowers.clearUserPref("mousewheel.default.action.override_x");
   SpecialPowers.clearUserPref("mousewheel.with_shift.action");
   SpecialPowers.clearUserPref("mousewheel.with_shift.action.override_x");
   SpecialPowers.clearUserPref("mousewheel.with_control.action");
   SpecialPowers.clearUserPref("mousewheel.with_control.action.override_x");
   SpecialPowers.clearUserPref("mousewheel.default.delta_multiplier_x");
   SpecialPowers.clearUserPref("mousewheel.default.delta_multiplier_y");
   SpecialPowers.clearUserPref("mousewheel.default.delta_multiplier_z");
   SpecialPowers.clearUserPref("mousewheel.with_alt.delta_multiplier_x");
   SpecialPowers.clearUserPref("mousewheel.with_alt.delta_multiplier_y");
   SpecialPowers.clearUserPref("mousewheel.with_alt.delta_multiplier_z");
   SpecialPowers.clearUserPref("mousewheel.with_control.delta_multiplier_x");
   SpecialPowers.clearUserPref("mousewheel.with_control.delta_multiplier_y");
   SpecialPowers.clearUserPref("mousewheel.with_control.delta_multiplier_z");
   SpecialPowers.clearUserPref("mousewheel.with_meta.delta_multiplier_x");
   SpecialPowers.clearUserPref("mousewheel.with_meta.delta_multiplier_y");
   SpecialPowers.clearUserPref("mousewheel.with_meta.delta_multiplier_z");
   SpecialPowers.clearUserPref("mousewheel.with_shift.delta_multiplier_x");
   SpecialPowers.clearUserPref("mousewheel.with_shift.delta_multiplier_y");
   SpecialPowers.clearUserPref("mousewheel.with_shift.delta_multiplier_z");
   SpecialPowers.clearUserPref("mousewheel.with_win.delta_multiplier_x");
   SpecialPowers.clearUserPref("mousewheel.with_win.delta_multiplier_y");
   SpecialPowers.clearUserPref("mousewheel.with_win.delta_multiplier_z");
   winUtils.restoreNormalRefresh();
   window.opener.finish();
 }
 </script>
 </pre>
 </body>
 </html>

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dom/events/test/window_wheel_default_action.html@b8a032363ba2 (annotated)

dom/events/test/window_wheel_default_action.html