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79 lines
2.6 KiB
HTML
79 lines
2.6 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=474356
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-->
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<head>
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<title>Test for Bug 474356</title>
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<script type="text/javascript" src="/MochiKit/packed.js"></script>
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<script type="text/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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<style>.zoom-test { visibility: hidden; }</style>
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<style><!-- placeholder for dynamic additions --></style>
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</head>
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<body onload="run()">
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<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=474356">Mozilla Bug 474356</a>
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<div id="content" style="display: none">
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</div>
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<script type="text/javascript">
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</script>
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<pre id="test">
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<div id="zoom1" class="zoom-test"></div>
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<div id="zoom2" class="zoom-test"></div>
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<div id="zoom3" class="zoom-test"></div>
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<script class="testbody" type="application/javascript">
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/** Test for Bug 474356 **/
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SimpleTest.waitForExplicitFinish();
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function run() {
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function zoom(factor) {
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var previous = SpecialPowers.getFullZoom(window);
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SpecialPowers.setFullZoom(window, factor);
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return previous;
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}
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function isVisible(divName) {
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return window.getComputedStyle(document.getElementById(divName), null).visibility == "visible";
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}
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function getZoomRatio() {
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return SpecialPowers.DOMWindowUtils.screenPixelsPerCSSPixel;
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}
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var screenPixelsPerCSSPixel = getZoomRatio();
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var baseRatio = 1.0 * screenPixelsPerCSSPixel;
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var doubleRatio = 2.0 * screenPixelsPerCSSPixel;
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var halfRatio = 0.5 * screenPixelsPerCSSPixel;
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var styleElem = document.getElementsByTagName("style")[1];
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styleElem.textContent =
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["@media all and (-moz-device-pixel-ratio: " + baseRatio + ") {",
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"#zoom1 { visibility: visible; }",
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"}",
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"@media all and (-moz-device-pixel-ratio: " + doubleRatio + ") {",
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"#zoom2 { visibility: visible; }",
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"}",
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"@media all and (-moz-device-pixel-ratio: " + halfRatio + ") {",
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"#zoom3 { visibility: visible; }",
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"}"
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].join("\n");
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ok(isVisible("zoom1"), "Base ratio rule should apply at base zoom level");
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ok(!isVisible("zoom2") && !isVisible("zoom3"), "no other rules should apply");
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var origZoom = zoom(2 * screenPixelsPerCSSPixel);
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ok(isVisible("zoom2"), "Double ratio rule should apply at double zoom level");
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ok(!isVisible("zoom1") && !isVisible("zoom3"), "no other rules should apply");
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zoom(0.5 * screenPixelsPerCSSPixel);
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ok(isVisible("zoom3"), "Half ratio rule should apply at half zoom level");
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ok(!isVisible("zoom1") && !isVisible("zoom2"), "no other rules should apply");
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zoom(origZoom);
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SimpleTest.finish();
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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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