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<!DOCTYPE html>
<!-- Test is tentative due to the following issues:
- https://github.com/w3c/csswg-drafts/issues/6112
- https://github.com/w3c/csswg-drafts/issues/6114
-->
<title>Tests the size-adjust descriptor of @font-face</title>
<link rel="help" href="https://drafts.csswg.org/css-fonts-5/#descdef-font-face-size-adjust">
<link rel="author" href="mailto:xiaochengh@chromium.org">
<link rel="match" href="size-adjust-tentative-ref.html">
<link rel="assert" title="size-adjust should resize all metrics of the font face">
<style>
@font-face {
font-family: custom-font;
src: local(Ahem), url(/fonts/Ahem.ttf);
size-adjust: 50%;
unicode-range: U+20, U+30-39; /* Digits and space */
}
.target {
font-size: 20px;
font-family: custom-font, sans-serif;
}
.square {
display: inline-block;
vertical-align: bottom;
background-color: black;
width: var(--l);
height: var(--l);
}
</style>
<p>size-adjust should scale ascent and descent metrics in 'line-height: normal'.</p>
<div class="target">
123<br>
123<br>
123
</div>
<p>In a text node with multiple fonts, size-adjust should only scale characters in the modified font. In the test case below, digits should be scaled, but not letters.</p>
<div class="target" style="height: 30px">
123xxx
</div>
<p>In nested elements, size-adjust should be applied to each text segment independently. Both elements below should be scaled to 50% of their original sizes, respectively.</p>
<div class="target">
123
<div style="font-size: 200%">
456
</div>
</div>
<p>The computed 'font-size' value (i.e., 'em') should not be affected. But 'ex' should be scaled since it's measured from the actual glyph.</p>
<div class="target" style="line-height: 1">
<span class="square" style="--l: 1em"></span><span class="square" style="--l: 1ex"></span>
</div>
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