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<!DOCTYPE html>
<title>getComputedStyle for elements with css zoom</title>
<link rel="author" title="Yotam Hacohen" href="mailto:yotha@chromium.org">
<link rel="author" title="Google" href="http://www.google.com/">
<link rel="help" href="https://drafts.csswg.org/css-viewport/">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<style>
div {
width: 64px;
height: 64px;
font-size: 64px;
line-height: 64px;
text-indent: 64px;
background-color: blue
}
div.x4_zoom {
zoom: 4.0;
background-color: blueviolet;
}
div.x2_zoom {
background-color: chartreuse;
zoom: 2.0;
}
</style>
</head>
<body>
<div id="no_zoom"></div>
<div class="x4_zoom" id="with_zoom"></div>
<div class="x2_zoom" id="parent_div">
<div class="x4_zoom" id="nested_zoom"></div>
</div>
<div class="x2_zoom" id="testing_set_style"></div>
<script>
const LENGTH_PROPS = [
"width",
"height",
"line-height",
"text-indent",
"font-size",
];
test(function() {
assert_true(!!no_zoom, "no zoom target exists");
assert_true(!!with_zoom, "zoom target exists");
assert_true(!!nested_zoom, "zoom target exists");
assert_true(!!parent_div, "parent div with zoom exists")
});
function assert_length_props(style, expected) {
for (let prop of LENGTH_PROPS) {
assert_equals(style.getPropertyValue(prop), expected, prop);
}
}
test(function(){
let noZoomStyle = getComputedStyle(no_zoom);
assert_length_props(noZoomStyle, "64px");
assert_equals(noZoomStyle.getPropertyValue("zoom"), "1");
});
test(function(){
let withZoomStyle = getComputedStyle(with_zoom);
assert_length_props(withZoomStyle, "64px");
assert_equals(withZoomStyle.getPropertyValue("zoom"), "4");
});
test(function(){
let parentWithZoomStyle = getComputedStyle(parent_div);
assert_length_props(parentWithZoomStyle, "64px");
assert_equals(parentWithZoomStyle.getPropertyValue("zoom"), "2");
});
test(function(){
nestedZoomStyle = getComputedStyle(nested_zoom);
assert_length_props(nestedZoomStyle, "64px");
assert_equals(nestedZoomStyle.getPropertyValue("zoom"), "4");
});
test(function(){
testDivStyle = getComputedStyle(testing_set_style);
testing_set_style.setAttribute("style", LENGTH_PROPS.map(p => p + ": 1px").join(";"));
assert_length_props(testDivStyle, "1px");
assert_equals(testDivStyle.getPropertyValue("zoom"), "2");
testing_set_style.setAttribute("style", LENGTH_PROPS.map(p => p + ": 64px").join(";"));
assert_length_props(testDivStyle, "64px");
assert_equals(testDivStyle.getPropertyValue("zoom"), "2");
});
</script>
</body>
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