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<!DOCTYPE html>
<meta charset="utf-8">
<title>content-visibility and size containment</title>
<link rel="help" href="https://drafts.csswg.org/css-contain/#content-visibility">
<link rel="help" href="https://bugzilla.mozilla.org/show_bug.cgi?id=1765615">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/rendering-utils.js"></script>
<meta name="assert" content="elements skipping their content change the used value of the contain property to turn on size containment.">
<style>
/* Selectors for content-visibility */
#spacer_for_far_to_viewport {
height: 300vh;
}
.content_visibility {
/* Dynamic modification of content-visibility may change whether style
containment is applied, which in turn may cause drastic invalidations
(e.g. rebuilding counters). Make the test more robust by forcing
style containment to always apply. */
contain: style;
}
#visible .content_visibility {
content-visibility: visible;
}
#hidden .content_visibility {
content-visibility: hidden;
}
#auto_far .content_visibility {
content-visibility: auto;
}
#auto_close .content_visibility {
content-visibility: auto;
}
#visible_to_hidden .content_visibility {
content-visibility: visible;
}
#hidden_to_visible .content_visibility {
content-visibility: hidden;
}
#visible_to_auto_far .content_visibility {
content-visibility: visible;
}
#auto_far_to_visible .content_visibility {
content-visibility: auto;
}
#hidden_to_auto_close .content_visibility {
content-visibility: hidden;
}
#auto_close_to_hidden .content_visibility {
content-visibility: auto;
}
#auto_dynamic_relevancy .content_visibility {
content-visibility: auto;
}
/* Selectors for testing sizing as empty */
.content_visibility {
display: inline-block;
}
.box {
display: inline-block;
width: 50px;
height: 5px;
background: black;
}
</style>
<body>
<div id="log"></div>
<div id="visible">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="hidden">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="auto_close">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="visible_to_hidden">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="hidden_to_visible">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="hidden_to_auto">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="auto_to_hidden">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="hidden_to_auto_close">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="auto_close_to_hidden">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="spacer_for_far_to_viewport"></div>
<div id="auto_far">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="visible_to_auto_far">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="auto_far_to_visible">
<div class="content_visibility"><div class="box"></div></div>
</div>
<div id="auto_dynamic_relevancy">
<div tabindex="1"></div>
<div class="content_visibility" tabindex="2"><div class="box"></div></div>
</div>
<script>
function sizeContainmentApplied(id) {
// To verify size containment, we test the width is zero.
// See contain-size-dynamic-001.html for more details.
let container = document.getElementById(id);
let content_visibility = container.getElementsByClassName("content_visibility")[0];
return content_visibility.getBoundingClientRect().width == 0;
}
function setContentVisibility(id, value) {
let container = document.getElementById(id);
let content_visibility = container.getElementsByClassName("content_visibility")[0];
content_visibility.style.contentVisibility = value;
}
promise_test(async () => {
assert_false(sizeContainmentApplied("visible"));
}, "content-visibility: visible");
promise_test(async () => {
assert_true(sizeContainmentApplied("hidden"));
}, "content-visibility: hidden");
promise_test(async () => {
await waitForAtLeastOneFrame();
assert_true(sizeContainmentApplied("auto_far"));
}, "content-visibility: auto (far from viewport)");
promise_test(async () => {
await waitForAtLeastOneFrame();
assert_false(sizeContainmentApplied("auto_close"));
}, "content-visibility: auto (close from viewport)");
promise_test(async () => {
setContentVisibility("visible_to_hidden", "hidden");
assert_true(sizeContainmentApplied("visible_to_hidden"));
}, "switching content-visibility from visible to hidden");
promise_test(async () => {
setContentVisibility("hidden_to_visible", "visible");
assert_false(sizeContainmentApplied("hidden_to_visible"));
}, "switching content-visibility from hidden to visible");
promise_test(async () => {
setContentVisibility("auto_far_to_visible", "visible");
assert_false(sizeContainmentApplied("auto_far_to_visible"));
}, "switching content-visibility from auto (far from viewport) to visible");
promise_test(async () => {
setContentVisibility("visible_to_auto_far", "auto");
await waitForAtLeastOneFrame();
assert_true(sizeContainmentApplied("visible_to_auto_far"));
}, "switching content-visibility from visible to auto (far from viewport)");
promise_test(async () => {
setContentVisibility("auto_close_to_hidden", "hidden");
assert_true(sizeContainmentApplied("auto_close_to_hidden"));
}, "switching content-visibility from auto (close from viewport) to hidden");
promise_test(async () => {
setContentVisibility("hidden_to_auto_close", "auto");
await waitForAtLeastOneFrame();
assert_false(sizeContainmentApplied("hidden_to_auto_close"));
}, "switching content-visibility from hidden to auto (close from viewport)");
let contentVisibilityAuto =
document.getElementById("auto_dynamic_relevancy").
getElementsByClassName("content_visibility")[0];
function clearRelevancyReasons() {
// Scrolling auto_dynamic_relevancy far from the viewport, unfocus it
// and unselect it. Also temporarily set its content-visibility to
// 'hidden' before scrolling to give more chance for browsers to
// re-apply size containment, especially if they fail the corresponding
// tests "going back to initial state" below.
setContentVisibility("auto_dynamic_relevancy", "hidden");
window.scrollTo(0, 0);
document.getElementById("auto_dynamic_relevancy")
.firstElementChild.focus({preventScroll: true});
window.getSelection().empty();
setContentVisibility("auto_dynamic_relevancy", "auto");
}
promise_test(async (t) => {
t.add_cleanup(clearRelevancyReasons);
await waitForAtLeastOneFrame();
assert_true(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied when initially far to the viewport");
contentVisibilityAuto.scrollIntoView();
await waitForAtLeastOneFrame();
assert_false(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied when changing from far to close to the viewport");
window.scrollTo(0, 0);
assert_true(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied when changing back from close to far to the viewport");
}, "content-visibility: auto, changing proximity to the viewport");
promise_test(async (t) => {
t.add_cleanup(clearRelevancyReasons);
await waitForAtLeastOneFrame();
assert_true(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied when initially unfocused");
contentVisibilityAuto.focus({preventScroll: true});
await waitForAtLeastOneFrame();
assert_false(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied after focusing");
document.getElementById("auto_dynamic_relevancy")
.firstElementChild.focus({preventScroll: true});
assert_true(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied after unfocusing back");
}, "content-visibility: auto, after being focused/unfocused");
promise_test(async (t) => {
t.add_cleanup(clearRelevancyReasons);
await waitForAtLeastOneFrame();
assert_true(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied when initially unselected");
window.getSelection().selectAllChildren(contentVisibilityAuto);
await waitForAtLeastOneFrame();
assert_false(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied when after selecting");
window.getSelection().empty();
await waitForAtLeastOneFrame();
assert_true(sizeContainmentApplied("auto_dynamic_relevancy"),
"size containment applied when unselecting back");
}, "content-visibility: auto, after being selected/unselected");
</script>
</body>
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