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<!doctype HTML>
<html>
<meta charset="utf8">
<title>Display Locking: measure forced SVG text</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<meta name="assert" content="content-visibility hidden svg descendant has correct layout">
<style>
#container {
width: 100px;
height: 100px;
background: lightgreen;
}
.hidden {
content-visibility: hidden;
}
</style>
<div id="parent"></div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
async_test((t) => {
let length;
function measureForced() {
t.step(() => {
length = document.getElementById("text").getComputedTextLength();
assert_not_equals(length, 0, "forced");
});
}
function measureWhenVisible() {
t.step(() => {
const visible_length = document.getElementById("text").getComputedTextLength();
assert_not_equals(visible_length, 0, "when visible");
assert_equals(visible_length, length, "when visible");
});
}
function construct(container) {
container.innerHTML = `
<svg viewBox="0 0 100 100" xmlns="http://www.w3.org/2000/svg">
<style>
.t { font: 10px sans-serif; }
</style>
<text id="text" x="10" y="10" class="t">This is text</text>
</svg>
`;
}
async function runTest() {
const container = document.createElement("div");
container.id = "container";
document.getElementById("parent").appendChild(container);
container.classList.add("hidden");
requestAnimationFrame(() => {
construct(container);
measureForced();
container.classList.remove("hidden");
requestAnimationFrame(() => {
measureWhenVisible();
t.done();
});
});
}
window.onload = function() {
requestAnimationFrame(() => requestAnimationFrame(runTest));
};
}, "Measure Forced SVG Text");
</script>
</html>
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