| <!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"> |
| 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"> |
| <span class="square" style="--l: 1em"></span><span class="square" style="--l: 1ex"></span> |
| </div> |
