The Tor Browser: dom/events/test/test_moz_mouse_pixel_scroll

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

dom/events/test/test_moz_mouse_pixel_scroll_event.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 MozMousePixelScroll events</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"/>
   <style>
     .scrollable {
       overflow: auto;
       line-height: 1;
       margin: 15px;
     }
     .scrollable > div {
       width: 1000px;
       height: 1000px;
       font-size: 1000px;
       line-height: 1;
     }
   </style>
 </head>
 <body>
 <p id="display"></p>
 <div id="Scrollable128" class="scrollable" style="font-size: 128px; width: 100px; height: 100px;">
  <div>
    <div id="Scrollable96" class="scrollable" style="font-size: 96px; width: 150px; height: 150px;">
      <div>
        <div id="Scrollable64" class="scrollable" style="font-size: 64px; width: 200px; height: 200px;">
          <div>
          </div>
        </div>
      </div>
    </div>
  </div>
 </div>
 <div id="Scrollable32" class="scrollable" style="font-size: 32px; width: 50px; height: 50px;">
   <div>
   </div>
 </div>
 <div id="content" style="display: none">
 </div>
 <pre id="test">
 <script type="application/javascript">
 SimpleTest.waitForExplicitFinish();
 SimpleTest.waitForFocus(runTests, window);
 var gScrollable128 = document.getElementById("Scrollable128");
 var gScrollable96 = document.getElementById("Scrollable96");
 var gScrollable64 = document.getElementById("Scrollable64");
 var gScrollable32 = document.getElementById("Scrollable32");
 var gRoot = document.documentElement;
 function prepareScrollUnits()
 {
   var result = -1;
   function handler(aEvent)
   {
     result = aEvent.detail;
     aEvent.preventDefault();
   }
   window.addEventListener("MozMousePixelScroll", handler, true);
   synthesizeWheel(gScrollable128, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable128.wheelLineHeight = result;
   ok(result > 96 && result < 200, "prepareScrollUnits: gScrollable128.wheelLineHeight may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable96, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable96.wheelLineHeight = result;
   ok(result > 64 && result < gScrollable128.wheelLineHeight, "prepareScrollUnits: gScrollable96.wheelLineHeight may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable64, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable64.wheelLineHeight = result;
   ok(result > 32 && result < gScrollable96.wheelLineHeight, "prepareScrollUnits: gScrollable64.wheelLineHeight may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable32, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable32.wheelLineHeight = result;
   ok(result > 16 && result < gScrollable64.wheelLineHeight, "prepareScrollUnits: gScrollable32.wheelLineHeight may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gRoot, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gRoot.wheelLineHeight = result;
   ok(result > 10 && result < gScrollable32.wheelLineHeight, "prepareScrollUnits: gRoot.wheelLineHeight may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable128, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable128.wheelHorizontalLine = result;
   ok(result > 50 && result < 200, "prepareScrollUnits: gScrollable128.wheelHorizontalLine may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable96, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable96.wheelHorizontalLine = result;
   ok(result > 30 && result < gScrollable128.wheelHorizontalLine, "prepareScrollUnits: gScrollable96.wheelHorizontalLine may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable64, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable64.wheelHorizontalLine = result;
   ok(result > 20 && result < gScrollable96.wheelHorizontalLine, "prepareScrollUnits: gScrollable64.wheelHorizontalLine may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable32, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable32.wheelHorizontalLine = result;
   ok(result > 12 && result < gScrollable64.wheelHorizontalLine, "prepareScrollUnits: gScrollable32.wheelHorizontalLine may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gRoot, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_LINE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gRoot.wheelHorizontalLine = result;
   ok(result > 5 && result < gScrollable32.wheelHorizontalLine, "prepareScrollUnits: gRoot.wheelHorizontalLine may be illegal value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable128, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable128.wheelPageHeight = result;
   ok(result >= (100 - gScrollable128.wheelLineHeight * 2) && result <= 100,
      "prepareScrollUnits: gScrollable128.wheelLineHeight is strange value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable96, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable96.wheelPageHeight = result;
   ok(result >= (150 - gScrollable96.wheelLineHeight * 2) && result <= 150,
      "prepareScrollUnits: gScrollable96.wheelLineHeight is strange value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable64, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable64.wheelPageHeight = result;
   ok(result >= (200 - gScrollable64.wheelLineHeight * 2) && result <= 200,
      "prepareScrollUnits: gScrollable64.wheelLineHeight is strange value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable32, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gScrollable32.wheelPageHeight = result;
   ok(result >= (50 - gScrollable32.wheelLineHeight * 2) && result <= 50,
      "prepareScrollUnits: gScrollable32.wheelLineHeight is strange value, got " + result);
   result = -1;
   synthesizeWheel(gRoot, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaY: 1.0, lineOrPageDeltaY: 1 });
   gRoot.wheelPageHeight = result;
   ok(window.innerHeight - result < 100 && window.innerHeight - result > 0,
      "prepareScrollUnits: gRoot.wheelLineHeight is strange value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable128, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable128.wheelPageWidth = result;
   ok(result >= (100 - gScrollable128.wheelLineHeight * 2) && result <= 100,
      "prepareScrollUnits: gScrollable128.wheelPageWidth is strange value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable96, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable96.wheelPageWidth = result;
   ok(result >= (150 - gScrollable96.wheelLineHeight * 2) && result <= 150,
      "prepareScrollUnits: gScrollable96.wheelPageWidth is strange value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable64, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable64.wheelPageWidth = result;
   ok(result >= (200 - gScrollable64.wheelLineHeight * 2) && result <= 200,
      "prepareScrollUnits: gScrollable64.wheelPageWidth is strange value, got " + result);
   result = -1;
   synthesizeWheel(gScrollable32, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gScrollable32.wheelPageWidth = result;
   ok(result >= (50 - gScrollable32.wheelLineHeight * 2) && result <= 50,
      "prepareScrollUnits: gScrollable32.wheelPageWidth is strange value, got " + result);
   result = -1;
   synthesizeWheel(gRoot, 10, 10,
                   { deltaMode: WheelEvent.DOM_DELTA_PAGE,
                     deltaX: 1.0, lineOrPageDeltaX: 1 });
   gRoot.wheelPageWidth = result;
   ok(window.innerWidth - result < 100 && window.innerWidth - result > 0,
      "prepareScrollUnits: gRoot.wheelPageWidth is strange value, got " + result);
   window.removeEventListener("MozMousePixelScroll", handler, true);
 }
 function doTests()
 {
   const kTests = [
     // DOM_DELTA_LINE
     { description: "Should be computed from nearest scrollable element, 128",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: gScrollable32
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: gScrollable32
       }
     },
     { description: "Should be computed from root element if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: gRoot
       }
     },
     { description: "Should be computed from root element, even if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: gRoot
       }
     },
     { description: "Should be computed from nearest scrollable element, 128",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable32
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable32
       }
     },
     { description: "Should be computed from root element if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gRoot
       }
     },
     { description: "Should be computed from root element, even if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gRoot
       }
     },
     { description: "Should be computed from nearest scrollable element, 128",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: null
       }
     },
     { description: "Should be computed from root element if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: null
       }
     },
     { description: "Should be computed from root element, even if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: null
       }
     },
     // DOM_DELTA_PAGE
     { description: "Should be computed from nearest scrollable element, 128",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: gScrollable32
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: gScrollable32
       }
     },
     { description: "Should be computed from root element if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: gRoot
       }
     },
     { description: "Should be computed from root element, even if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: -1.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: -1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: gRoot
       }
     },
     { description: "Should be computed from nearest scrollable element, 128",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable128
       }
     },
     { description: "Should be computed from nearest scrollable element, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable96
       }
     },
     { description: "Should be computed from nearest scrollable element, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable32
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gScrollable32
       }
     },
     { description: "Should be computed from root element if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gRoot
       }
     },
     { description: "Should be computed from root element, even if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 0.0, deltaY: -1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: -1 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: null, y: gRoot
       }
     },
     { description: "Should be computed from nearest scrollable element, 128",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction",
       target: gScrollable128,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable128.scrollLeft = 0;
         gScrollable128.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable128, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 96",
       target: gScrollable96,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable96, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable64, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element, even if not scrollable to the direction, 32",
       target: gScrollable32,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable32.scrollLeft = 0;
         gScrollable32.scrollTop = 0;
       },
       cleanup: function () {
       },
       expected: {
         x: gScrollable32, y: null
       }
     },
     { description: "Should be computed from root element if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: null
       }
     },
     { description: "Should be computed from root element, even if there is no scrollable element, root",
       target: gRoot,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_PAGE,
         deltaX: -1.0, deltaY: 0.0, lineOrPageDeltaX: -1, lineOrPageDeltaY: 0 },
       prepare: function () {
       },
       cleanup: function () {
       },
       expected: {
         x: gRoot, y: null
       }
     },
     // Overflow: hidden; boxes shouldn't be ignored.
     { description: "Should be computed from nearest scrollable element even if it hides overflow content, 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.style.overflow = "hidden";
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
         gScrollable64.style.overflow = "auto";
       },
       expected: {
         x: gScrollable64, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element even if it hides overflow content (X), 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.style.overflowX = "hidden";
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
         gScrollable64.style.overflow = "auto";
       },
       expected: {
         x: gScrollable64, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element even if it hides overflow content (Y), 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 1.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.style.overflowY = "hidden";
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
         gScrollable64.style.overflow = "auto";
       },
       expected: {
         x: gScrollable64, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element even if it hides overflow content (X), 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.style.overflowX = "hidden";
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
         gScrollable64.style.overflow = "auto";
       },
       expected: {
         x: null, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element even if it hides overflow content (Y), 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 0.0, deltaY: 1.0, lineOrPageDeltaX: 0, lineOrPageDeltaY: 1 },
       prepare: function () {
         gScrollable64.style.overflowY = "hidden";
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
         gScrollable64.style.overflow = "auto";
       },
       expected: {
         x: null, y: gScrollable64
       }
     },
     { description: "Should be computed from nearest scrollable element even if it hides overflow content (X), 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable64.style.overflowX = "hidden";
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
         gScrollable64.style.overflow = "auto";
       },
       expected: {
         x: gScrollable64, y: null
       }
     },
     { description: "Should be computed from nearest scrollable element even if it hides overflow content (Y), 64",
       target: gScrollable64,
       event: {
         deltaMode: WheelEvent.DOM_DELTA_LINE,
         deltaX: 1.0, deltaY: 0.0, lineOrPageDeltaX: 1, lineOrPageDeltaY: 0 },
       prepare: function () {
         gScrollable64.style.overflowY = "hidden";
         gScrollable96.scrollLeft = 0;
         gScrollable96.scrollTop = 0;
         gScrollable64.scrollLeft = 0;
         gScrollable64.scrollTop = 0;
       },
       cleanup: function () {
         gScrollable64.style.overflow = "auto";
       },
       expected: {
         x: gScrollable64, y: null
       }
     },
   ];
   var currentTest, description, firedX, firedY;
   function handler(aEvent)
   {
     aEvent.preventDefault();
     if (aEvent.axis != MouseScrollEvent.HORIZONTAL_AXIS &&
         aEvent.axis != MouseScrollEvent.VERTICAL_AXIS) {
       ok(false,
          description + "The event had invalid axis (" + aEvent.axis + ")");
       return;
     }
     var isHorizontal = (aEvent.axis == MouseScrollEvent.HORIZONTAL_AXIS);
     if ((isHorizontal && !currentTest.expected.x) ||
         (!isHorizontal && !currentTest.expected.y)) {
       ok(false,
          description + "The event fired unexpectedly (" +
          (isHorizontal ? "Horizontal" : "Vertical") + ")");
       return;
     }
     if (isHorizontal) {
       firedX = true;
     } else {
       firedY = true;
     }
     var expectedDetail =
       (currentTest.event.deltaMode == WheelEvent.DOM_DELTA_LINE) ?
         (isHorizontal ? currentTest.expected.x.wheelHorizontalLine :
                         currentTest.expected.y.wheelLineHeight) :
         (isHorizontal ? currentTest.expected.x.wheelPageWidth :
                         currentTest.expected.y.wheelPageHeight);
     is(Math.abs(aEvent.detail), expectedDetail,
        description + ((isHorizontal) ? "horizontal" : "vertical") + " event detail is wrong");
   }
   window.addEventListener("MozMousePixelScroll", handler, true);
   for (var i = 0; i < kTests.length; i++) {
     currentTest = kTests[i];
     description = "doTests, " + currentTest.description + " (deltaMode: " +
       (currentTest.event.deltaMode == WheelEvent.DOM_DELTA_LINE ?
         "DOM_DELTA_LINE" : "DOM_DELTA_PAGE") +
         ", deltaX: " + currentTest.event.deltaX +
         ", deltaY: " + currentTest.event.deltaY + "): ";
     currentTest.prepare();
     firedX = firedY = false;
     synthesizeWheel(currentTest.target, 10, 10, currentTest.event);
     if (currentTest.expected.x) {
       ok(firedX, description + "Horizontla MozMousePixelScroll event wasn't fired");
     }
     if (currentTest.expected.y) {
       ok(firedY, description + "Vertical MozMousePixelScroll event wasn't fired");
     }
     currentTest.cleanup();
   }
   window.removeEventListener("MozMousePixelScroll", handler, true);
 }
 function runTests()
 {
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_x", 100);
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_y", 100);
   SpecialPowers.setIntPref("mousewheel.default.delta_multiplier_z", 100);
   SpecialPowers.setIntPref("mousewheel.with_alt.delta_multiplier_x", 100);
   SpecialPowers.setIntPref("mousewheel.with_alt.delta_multiplier_y", 100);
   SpecialPowers.setIntPref("mousewheel.with_alt.delta_multiplier_z", 100);
   SpecialPowers.setIntPref("mousewheel.with_control.delta_multiplier_x", 100);
   SpecialPowers.setIntPref("mousewheel.with_control.delta_multiplier_y", 100);
   SpecialPowers.setIntPref("mousewheel.with_control.delta_multiplier_z", 100);
   SpecialPowers.setIntPref("mousewheel.with_meta.delta_multiplier_x", 100);
   SpecialPowers.setIntPref("mousewheel.with_meta.delta_multiplier_y", 100);
   SpecialPowers.setIntPref("mousewheel.with_meta.delta_multiplier_z", 100);
   SpecialPowers.setIntPref("mousewheel.with_shift.delta_multiplier_x", 100);
   SpecialPowers.setIntPref("mousewheel.with_shift.delta_multiplier_y", 100);
   SpecialPowers.setIntPref("mousewheel.with_shift.delta_multiplier_z", 100);
   SpecialPowers.setIntPref("mousewheel.with_win.delta_multiplier_x", 100);
   SpecialPowers.setIntPref("mousewheel.with_win.delta_multiplier_y", 100);
   SpecialPowers.setIntPref("mousewheel.with_win.delta_multiplier_z", 100);
   prepareScrollUnits();
   doTests();
   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");
   SimpleTest.finish();
 }
 </script>
 </pre>
 </body>
 </html>

The Tor Browser / annotate

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

dom/events/test/test_moz_mouse_pixel_scroll_event.html