mozilla-central/testing/web-platform/tests/css/css-overflow/scrollable-overflow-transform-unreachable-region.html

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<!doctype html>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width,initial-scale=1">
<title>Scrollable Overflow of a Scroll Container with Transformed Child in Unreachable Scrollable Overflow Region.</title>
<link rel="author" title="Jo Steven Novaryo" href="mailto:steven.novaryo@gmail.com">
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
<style>
body { margin: 0 }
.wrapper {
width: 100px;
height: 200px;
overflow: scroll;
}
.inner {
width: 100px;
height: 200px;
background-color: lime;
transform: translate(-3px, -6px) scale(1.10);
}
</style>
<div class="wrapper">
<div class="inner"></div>
</div>
<script>
const wrapper = document.querySelector(".wrapper");
const contentBox = {
width: 100,
height: 200,
};
function getCurrentTestName(display, direction, writingMode, flexDirection, flexWrap) {
return `display: ${display}; ` +
`direction: ${direction}; ` +
`writing-mode: ${writingMode}; ` +
`flex-direction: ${flexDirection}; ` +
`flex-wrap: ${flexWrap};`;
}
for (let display of ["flow-root", "flex", "grid"]) {
for (let flexDirection of ["row", "row-reverse", "column", "column-reverse"]) {
if (flexDirection != "row" && display != "flex") {
// Don't bother retesting with all flexDirection values unless we're actually a flex container
continue;
}
for (let flexWrap of ["nowrap", "wrap-reverse"]) {
if (flexWrap != "nowrap" && display != "flex") {
// Don't bother retesting with all flexWrap values unless we're actually a flex container
continue;
}
for (let direction of ["ltr", "rtl"]) {
for (let writingMode of ["horizontal-tb", "vertical-lr", "vertical-rl"]) {
wrapper.style.display = display;
wrapper.style.direction = direction;
wrapper.style.writingMode = writingMode;
wrapper.style.flexDirection = flexDirection;
wrapper.style.flexWrap = flexWrap;
// Suppress scrollbars because they get added to the padding are
// and would need to account for them in flexbox.
wrapper.style.scrollbarWidth = display == "flex" ? "none" : "";
let vertical = writingMode.startsWith("vertical");
let scrollToTop = vertical && direction == "rtl";
let scrollToLeft = (!vertical && direction == "rtl") || writingMode == "vertical-rl";
let flexMainAxisIsVertical = flexDirection.startsWith("row") == vertical;
if (display == "flex") {
if (flexDirection.endsWith("-reverse")) {
if (flexMainAxisIsVertical) {
scrollToTop = !scrollToTop;
} else {
scrollToLeft = !scrollToLeft;
}
}
if (flexWrap == "wrap-reverse") {
if (flexMainAxisIsVertical) {
scrollToLeft = !scrollToLeft;
} else {
scrollToTop = !scrollToTop;
}
}
}
currentTestName = getCurrentTestName(display, direction, writingMode, flexDirection, flexWrap);
test(function() {
assert_equals(wrapper.scrollWidth, (scrollToLeft ? 108 : 102), "scrollWidth");
}, "scrollWidth of " + currentTestName);
test(function() {
assert_equals(wrapper.scrollHeight, (scrollToTop ? 216 : 204), "scrollHeight");
}, "scrollHeight of " + currentTestName);
}
}
}
}
}
</script>