testing/web-platform/tests/css/css-values/ch-unit-017.html
author Duncan McIntosh <dmcintosh@mozilla.com>
Wed, 09 Jul 2025 19:42:02 +0000 (3 hours ago)
changeset 795924 9ccc6a2267cbf69c621fec973bd28573c2a45a1f
parent 514226 8f75f5c82eefba12925e2bc48c3d17909645e496
permissions -rw-r--r--
Bug 1966586 - Reuse other browser windows when opening _blank links in Taskbar Tabs windows. r=nrishel This doesn't affect other tab additions, nor does it stop the tab bar from appearing altogether. The idea is that _if_ another tab is somehow made, the user should see it; but we should not create new tabs if we can avoid it. This also adds tests for opening URIs in popups and taskbar tabs to make it less likely that this breaks in future. Differential Revision: https://phabricator.services.mozilla.com/D253726
<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Values and Units Test: support for the ch unit</title>
<link rel="author" title="Cameron McCormack" href="mailto:cam@mcc.id.au">
<link rel="help" href="https://drafts.csswg.org/css-values-3/#font-relative-lengths">
<link rel="match" href="reference/ch-unit-016-ref.html">
<meta name="assert" content="In vertical upright writing modes, the ch unit is equal to the vertical advance of the zero glyph.">
<style>
@font-face {
  font-family: ChTestShortZero;
  src: url(resources/ChTestShortZero.woff);
}
div {
  height: 10px;
  background-color: blue;
  margin-top: 10px;
}
.test {
  writing-mode: vertical-rl;
  text-orientation: upright;
  width: 5ch;
}
.ref {
  width: 100px;
}
</style>
<p>The test passes if there are two blue rectangles of equal length.</p>
<!-- ChTestShortZero has a '0' glyph whose vertical advance is a quarter
     of the units per em, so ch units in vertical upright writing modes
     should compute to 0.25em, resulting in the div being 100px width. -->
<div class="test" style="font: 80px ChTestShortZero;"></div>
<div class="ref"></div>