test_innerScreen.xhtml

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<?xml version="1.0"?>

<?xml-stylesheet href="chrome://global/skin" type="text/css"?>

<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css" type="text/css"?>

<!--

  Tests for mozInnerScreenX/Y properties

-->

<window title="Test mozInnerScreenX/Y Properties"

        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>

  <!-- test resuls are displayed in the html:body -->

  <body xmlns="http://www.w3.org/1999/xhtml"

        style="height: 400px; position:relative; overflow: auto;">

    <iframe id="f"

            style="position:absolute; left:100px;

                   top:200px; width:200px; height:200px; border:none;"></iframe>

  </body>

  <!-- test code goes here -->

  <script type="application/javascript"><![CDATA[

function isRounded(a, b, msg) {

  ok(Math.round(a) == Math.round(b),

     msg + " (rounded), got " + a + ", expected " + b);

function doTests()

  var readable = false;

try

    mozScreenPixelsPerCSSPixel;

    readable = true;

  catch(ex) { }

  ok(!readable, "window pixels per css pixel shouldn't be readable to content");

  var devPxPerCSSPx = window.devicePixelRatio;

  is(window.devicePixelRatio, devPxPerCSSPx, "window.devicePixelRatio");

  var rootElement = document.documentElement;

  isRounded(window.mozInnerScreenX*devPxPerCSSPx, rootElement.screenX,

            "window screen X");

  isRounded(window.mozInnerScreenY*devPxPerCSSPx, rootElement.screenY,

            "window screen Y");

  var f = document.getElementById("f");

  var fBounds = f.getBoundingClientRect();

  var fbc = f.contentWindow.docShell.browsingContext;

  isRounded(f.contentWindow.mozInnerScreenX,

            window.mozInnerScreenX + fBounds.left,

            "frame screen X");

  isRounded(f.contentWindow.mozInnerScreenY,

            window.mozInnerScreenY + fBounds.top,

            "frame screen Y");

  fbc.fullZoom *= 2;

  is(f.contentWindow.devicePixelRatio, 2*devPxPerCSSPx,

     "frame screen pixels per CSS pixel");

  is(f.contentWindow.devicePixelRatio, 2*devPxPerCSSPx, "frame devicePixelRatio");

  isRounded(f.contentWindow.mozInnerScreenX*2,

            window.mozInnerScreenX + fBounds.left,

            "zoomed frame screen X");

  isRounded(f.contentWindow.mozInnerScreenY*2,

            window.mozInnerScreenY + fBounds.top,

            "zoomed frame screen Y");

  fbc.fullZoom = 1.0;

  SimpleTest.finish();

addLoadEvent(doTests);

SimpleTest.waitForExplicitFinish();

]]>

</script>

</window>