1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/layout/style/test/test_moz_device_pixel_ratio.html Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,77 @@
1.4 +<!DOCTYPE HTML>
1.5 +<html>
1.6 +<!--
1.7 +https://bugzilla.mozilla.org/show_bug.cgi?id=474356
1.8 +-->
1.9 +<head>
1.10 + <title>Test for Bug 474356</title>
1.11 + <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
1.12 + <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
1.13 + <style>.zoom-test { visibility: hidden; }</style>
1.14 + <style><!-- placeholder for dynamic additions --></style>
1.15 +</head>
1.16 +<body onload="run()">
1.17 +<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=474356">Mozilla Bug 474356</a>
1.18 +<div id="content" style="display: none">
1.19 +
1.20 +</div>
1.21 +<script type="text/javascript">
1.22 +</script>
1.23 +<pre id="test">
1.24 +<div id="zoom1" class="zoom-test"></div>
1.25 +<div id="zoom2" class="zoom-test"></div>
1.26 +<div id="zoom3" class="zoom-test"></div>
1.27 +<script class="testbody" type="application/javascript">
1.28 +
1.29 +/** Test for Bug 474356 **/
1.30 +
1.31 +SimpleTest.waitForExplicitFinish();
1.32 +
1.33 +function run() {
1.34 + function zoom(factor) {
1.35 + var previous = SpecialPowers.getFullZoom(window);
1.36 + SpecialPowers.setFullZoom(window, factor);
1.37 + return previous;
1.38 + }
1.39 +
1.40 + function isVisible(divName) {
1.41 + return window.getComputedStyle(document.getElementById(divName), null).visibility == "visible";
1.42 + }
1.43 +
1.44 + function getScreenPixelsPerCSSPixel() {
1.45 + return SpecialPowers.DOMWindowUtils.screenPixelsPerCSSPixel;
1.46 + }
1.47 +
1.48 + var screenPixelsPerCSSPixel = getScreenPixelsPerCSSPixel();
1.49 + var baseRatio = 1.0 * screenPixelsPerCSSPixel;
1.50 + var doubleRatio = 2.0 * screenPixelsPerCSSPixel;
1.51 + var halfRatio = 0.5 * screenPixelsPerCSSPixel;
1.52 + var styleElem = document.getElementsByTagName("style")[1];
1.53 + styleElem.textContent =
1.54 + ["@media all and (-moz-device-pixel-ratio: " + baseRatio + ") {",
1.55 + "#zoom1 { visibility: visible; }",
1.56 + "}",
1.57 + "@media all and (-moz-device-pixel-ratio: " + doubleRatio + ") {",
1.58 + "#zoom2 { visibility: visible; }",
1.59 + "}",
1.60 + "@media all and (-moz-device-pixel-ratio: " + halfRatio + ") {",
1.61 + "#zoom3 { visibility: visible; }",
1.62 + "}"
1.63 + ].join("\n");
1.64 +
1.65 + ok(isVisible("zoom1"), "Base ratio rule should apply at base zoom level");
1.66 + ok(!isVisible("zoom2") && !isVisible("zoom3"), "no other rules should apply");
1.67 + var origZoom = zoom(2);
1.68 + ok(isVisible("zoom2"), "Double ratio rule should apply at double zoom level");
1.69 + ok(!isVisible("zoom1") && !isVisible("zoom3"), "no other rules should apply");
1.70 + zoom(0.5);
1.71 + ok(isVisible("zoom3"), "Half ratio rule should apply at half zoom level");
1.72 + ok(!isVisible("zoom1") && !isVisible("zoom2"), "no other rules should apply");
1.73 + zoom(origZoom);
1.74 +
1.75 + SimpleTest.finish();
1.76 +}
1.77 +</script>
1.78 +</pre>
1.79 +</body>
1.80 +</html>
