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<!DOCTYPE html>
<meta charset="utf-8">
<title>Logical properties with deferred <code>writing-mode</code></title>
<link rel="author" title="Oriol Brufau" href="mailto:obrufau@igalia.com" />
<link rel="help" href="https://drafts.csswg.org/css-logical-1/#box">
<link rel="help" href="https://drafts.csswg.org/css-variables-1/">
<link rel="help" href="https://drafts.csswg.org/css-values-4/#common-keywords">
<meta name="assert" content="Checks that logical properties are resolved correctly when the writing mode isn't known until computed-value time.">
<style>
#parent {
writing-mode: vertical-lr;
}
@layer {
.revert-layer {
writing-mode: vertical-rl;
}
}
@layer {
.revert-layer {
writing-mode: horizontal-tb;
writing-mode: revert-layer;
}
}
</style>
<div id="parent">
<div id="target"></div>
</div>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script>
const target = document.getElementById("target");
const computedStyle = getComputedStyle(target);
function check(expected) {
for (let [prop, value] of Object.entries(expected)) {
assert_equals(computedStyle.getPropertyValue(prop), value, prop);
}
}
test(function() {
target.style.cssText = `
--wm: vertical-rl;
writing-mode: var(--wm);
margin-block-start: 1px;
margin-block-end: 2px;
margin-inline-start: 3px;
margin-inline-end: 4px;
`;
check({
// Logicals
"margin-block-start": "1px",
"margin-block-end": "2px",
"margin-inline-start": "3px",
"margin-inline-end": "4px",
// Physicals
"margin-right": "1px",
"margin-left": "2px",
"margin-top": "3px",
"margin-bottom": "4px",
});
}, "Writing mode with variable");
test(function() {
target.style.cssText = `
--wm1: vertical-rl;
--wm2: var(--wm1);
writing-mode: var(--wm2);
margin-block-start: 1px;
margin-block-end: 2px;
margin-inline-start: 3px;
margin-inline-end: 4px;
`;
check({
// Logicals
"margin-block-start": "1px",
"margin-block-end": "2px",
"margin-inline-start": "3px",
"margin-inline-end": "4px",
// Physicals
"margin-right": "1px",
"margin-left": "2px",
"margin-top": "3px",
"margin-bottom": "4px",
});
}, "Writing mode with nested variables");
test(function() {
target.style.cssText = `
writing-mode: inherit;
margin-block-start: 1px;
margin-block-end: 2px;
margin-inline-start: 3px;
margin-inline-end: 4px;
`;
check({
// Logicals
"margin-block-start": "1px",
"margin-block-end": "2px",
"margin-inline-start": "3px",
"margin-inline-end": "4px",
// Physicals
"margin-left": "1px",
"margin-right": "2px",
"margin-top": "3px",
"margin-bottom": "4px",
});
}, "Writing mode with 'inherit'");
test(function() {
target.style.cssText = `
writing-mode: initial;
margin-block-start: 1px;
margin-block-end: 2px;
margin-inline-start: 3px;
margin-inline-end: 4px;
`;
check({
// Logicals
"margin-block-start": "1px",
"margin-block-end": "2px",
"margin-inline-start": "3px",
"margin-inline-end": "4px",
// Physicals
"margin-top": "1px",
"margin-bottom": "2px",
"margin-left": "3px",
"margin-right": "4px",
});
}, "Writing mode with 'initial'");
test(function() {
target.style.cssText = `
writing-mode: revert;
margin-block-start: 1px;
margin-block-end: 2px;
margin-inline-start: 3px;
margin-inline-end: 4px;
`;
check({
// Logicals
"margin-block-start": "1px",
"margin-block-end": "2px",
"margin-inline-start": "3px",
"margin-inline-end": "4px",
// Physicals
"margin-left": "1px",
"margin-right": "2px",
"margin-top": "3px",
"margin-bottom": "4px",
});
}, "Writing mode with 'revert'");
test(function() {
target.className = "revert-layer";
target.style.cssText = `
margin-block-start: 1px;
margin-block-end: 2px;
margin-inline-start: 3px;
margin-inline-end: 4px;
`;
check({
// Logicals
"margin-block-start": "1px",
"margin-block-end": "2px",
"margin-inline-start": "3px",
"margin-inline-end": "4px",
// Physicals
"margin-right": "1px",
"margin-left": "2px",
"margin-top": "3px",
"margin-bottom": "4px",
});
}, "Writing mode with 'revert-layer'");
</script>
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