tree cec5f250ccda30fb69a248db707991087f5d9b1a
parent 44b99583e4d12a40e6d604402011c4013177f7ed
author Stephen Chenney <schenney@chromium.org> 1695859989 -0700
committer Blink WPT Bot <blink-w3c-test-autoroller@chromium.org> 1695861033 -0700

Use originating font for highlight pseudo units

Per CSS WG resolution, CSS Highlight Pseudo elements should
use the font from their originating element when computing
units for text decorations and the like.

When resolving style, we now check for font relative units in the parent style and recompute style for any highlight that has such units. To avoid memory blow-out, we try to re-use as much as possible of the existing style, only recomputing those with font relative units.

Testing for numerous situations is provided.

Bug: 1466288
Change-Id: Ice191b44c3420f1b4c4a9019d879c92239d5f299
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/4754741
Reviewed-by: Anders Hartvoll Ruud <andruud@chromium.org>
Commit-Queue: Stephen Chenney <schenney@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1202136}