tree 6afd962ac024b20d1bc3d141fa697358a3fd3b3c
parent e24e08b0f0e974643d1f4ced20f2981cc337a628
author Martin Robinson <mrobinson@igalia.com> 1669851010 +0000
committer moz-wptsync-bot <wptsync@mozilla.com> 1669973720 +0000

Add support for `content-visibility: auto

This change adds support for `content-visibilty: auto` as well as
showing and hiding content based on the relevancy of the content as
defined in the specification. Changes to relevancy are handled by
triggering updates in a set of `content-visibility: auto` frames stored
in PresShell at the appropriate time in the document lifecycle.

Some tests are now failing due to this feature exposing the failures,
but they will be fixed in later changes.

This change is a reland of an earlier version that properly updates
intrinsic sizes and triggers an update of remembered size for the
purposes of contain-intrinsic-size when content relevancy changes.

Co-authored-by: Jihye Hong <jihye@igalia.com>

Differential Revision: https://phabricator.services.mozilla.com/D159693

bugzilla-url: https://bugzilla.mozilla.org/show_bug.cgi?id=1791759
gecko-commit: c1e64e8e466506d1d9a36d747df25527bd545b10
gecko-reviewers: emilio