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<!DOCTYPE html>
<title>unicode-bidi UA stylesheet rules</title>
<link rel="author" href="masonf@chromium.org">
<link rel="help" href="https://html.spec.whatwg.org/multipage/rendering.html#bidi-rendering">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<script src='../../resources/common.js'></script>
<body>
<script>
function getUnicodeBidi(el) {
return window.getComputedStyle(el, "").unicodeBidi;
}
// These elements should have `unicode-bidi: isolate` in the UA stylesheet:
const isolateElements = ['address', 'blockquote', 'center', 'div', 'figure',
'figcaption', 'footer', 'form', 'header', 'hr', 'legend', 'listing',
'main', 'p', 'plaintext', 'pre', 'summary', 'xmp', 'article', 'aside',
'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hgroup', 'nav', 'section', 'search',
'table', 'caption', 'colgroup', 'col', 'thead', 'tbody', 'tfoot', 'tr',
'td', 'th', 'dir', 'dd', 'dl', 'dt', 'menu', 'ol', 'ul', 'li', 'bdi',
'output'];
const allButSeparateTests = HTML5_ELEMENTS.filter(el => (!['bdo','input','textarea','pre'].includes(el)));
for(let tagname of allButSeparateTests) {
test((t) => {
const element = document.createElement(tagname);
t.add_cleanup(() => element.remove());
document.body.appendChild(element);
const expectation = isolateElements.includes(tagname) ? 'isolate' : 'normal';
assert_equals(getUnicodeBidi(element),expectation);
element.setAttribute('dir','ltr');
assert_equals(getUnicodeBidi(element),'isolate','with dir=ltr');
element.setAttribute('dir','LtR');
assert_equals(getUnicodeBidi(element),'isolate','with dir=LtR (case insensitive)');
element.setAttribute('dir','rtl');
assert_equals(getUnicodeBidi(element),'isolate','with dir=rtl');
element.setAttribute('dir','auto');
assert_equals(getUnicodeBidi(element),'isolate','with dir=auto');
element.setAttribute('dir','INVALID');
assert_equals(getUnicodeBidi(element),expectation,'invalid dir value goes back to normal defaults');
},`UA stylesheet rule for unicode-bidi, for <${tagname}>`);
}
test((t) => {
const element = document.createElement('bdo');
t.add_cleanup(() => element.remove());
document.body.appendChild(element);
assert_equals(getUnicodeBidi(element),'isolate-override');
element.setAttribute('dir','ltr');
assert_equals(getUnicodeBidi(element),'isolate-override','with dir=ltr');
element.setAttribute('dir','LtR');
assert_equals(getUnicodeBidi(element),'isolate-override','with dir=LtR (case insensitive)');
element.setAttribute('dir','rtl');
assert_equals(getUnicodeBidi(element),'isolate-override','with dir=rtl');
element.setAttribute('dir','auto');
assert_equals(getUnicodeBidi(element),'isolate-override','with dir=auto');
element.setAttribute('dir','INVALID');
assert_equals(getUnicodeBidi(element),'isolate-override','invalid dir value');
},`UA stylesheet rule for unicode-bidi, for <bdo>`);
const shouldBePlaintext = ['search','tel','url','email'];
for(let type of HTML5_INPUT_TYPES) {
test((t) => {
const element = document.createElement('input');
t.add_cleanup(() => element.remove());
element.type = type;
document.body.appendChild(element);
const autoExpectation = shouldBePlaintext.includes(type) ? 'plaintext' : 'isolate';
assert_equals(getUnicodeBidi(element),'normal');
element.setAttribute('dir','ltr');
assert_equals(getUnicodeBidi(element),'isolate','with dir=ltr');
element.setAttribute('dir','LtR');
assert_equals(getUnicodeBidi(element),'isolate','with dir=LtR (case insensitive)');
element.setAttribute('dir','rtl');
assert_equals(getUnicodeBidi(element),'isolate','with dir=rtl');
element.setAttribute('dir','auto');
assert_equals(getUnicodeBidi(element),autoExpectation,'with dir=auto');
element.setAttribute('dir','AuTo');
assert_equals(getUnicodeBidi(element),autoExpectation,'with dir=auto (case insensitive)');
element.setAttribute('dir','INVALID');
assert_equals(getUnicodeBidi(element),'normal','invalid dir value');
},`UA stylesheet rule for unicode-bidi, for <input type=${type}>`);
}
for(let tagname of ['textarea','pre']) {
test((t) => {
const element = document.createElement(tagname);
t.add_cleanup(() => element.remove());
document.body.appendChild(element);
const expectation = tagname === 'textarea' ? 'normal' : 'isolate';
assert_equals(getUnicodeBidi(element),expectation);
element.setAttribute('dir','ltr');
assert_equals(getUnicodeBidi(element),'isolate','with dir=ltr');
element.setAttribute('dir','LtR');
assert_equals(getUnicodeBidi(element),'isolate','with dir=LtR (case insensitive)');
element.setAttribute('dir','rtl');
assert_equals(getUnicodeBidi(element),'isolate','with dir=rtl');
element.setAttribute('dir','auto');
assert_equals(getUnicodeBidi(element),'plaintext','with dir=auto');
element.setAttribute('dir','AuTo');
assert_equals(getUnicodeBidi(element),'plaintext','with dir=auto (case insensitive)');
element.setAttribute('dir','INVALID');
assert_equals(getUnicodeBidi(element),expectation,'invalid dir value');
},`UA stylesheet rule for unicode-bidi, for <${tagname}>`);
}
</script>
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