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48 lines
1.6 KiB
HTML
48 lines
1.6 KiB
HTML
<!DOCTYPE HTML>
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<html>
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<!--
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https://bugzilla.mozilla.org/show_bug.cgi?id=513439
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-->
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<head>
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<title>Test for Bug 513439</title>
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<script type="application/javascript" src="/MochiKit/packed.js"></script>
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<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
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<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
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</head>
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<body>
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=513439">Mozilla Bug 513439</a>
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<p id="display"></p>
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<div id="content" style="display: none">
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</div>
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<pre id="test">
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<script type="application/javascript">
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/** Test for Bug 513439 **/
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netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
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var prefService = Components.classes["@mozilla.org/preferences-service;1"]
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.getService(Components.interfaces.nsIPrefService);
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var layoutCSSBranch = prefService.getBranch("layout.css.");
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var oldVal = layoutCSSBranch.getCharPref("devPixelsPerPx");
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try {
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var domWindowUtils = window.QueryInterface(Components.interfaces.nsIInterfaceRequestor)
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.getInterface(Components.interfaces.nsIDOMWindowUtils);
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var devPxPerCSSPx = domWindowUtils.screenPixelsPerCSSPixel;
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layoutCSSBranch.setCharPref("devPixelsPerPx", "2");
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is(domWindowUtils.screenPixelsPerCSSPixel, 2, "devPixelsPerPx wasn't set correctly");
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layoutCSSBranch.setCharPref("devPixelsPerPx", "1.5");
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is(domWindowUtils.screenPixelsPerCSSPixel, 1.5, "devPixelsPerPx wasn't set correctly");
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} finally {
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layoutCSSBranch.setCharPref("devPixelsPerPx", oldVal);
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}
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</script>
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</pre>
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</body>
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</html>
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