[line-clamp] [RubyLB] Make sure ruby isn't visible in clamped lines
With RubyLB, in some cases ruby annotations would not be hidden even
though the line containing them would be. This is because when a line
is after the clamp point, the line box and its logical line items
would be marked as hidden for paint, but in RubyLB the line's ruby
annotations and their line items are stored in the logical ruby
columns.
This patch fixes this in FragmentItemsBuilder::AddLine, when
FragmentItems are created for a line's multiple annotations, by
marking every item in the annotations as hidden for paint if the
line's fragment is marked as such.
Aside from adding a test for this issue, this patch also adds a test
that the sizing of a clamped block box properly takes into account any
ruby annotations that add leading to a line. This already worked as
expected, presumably due to https://crrev.com/c/5683304 storing the
PreviousInflowPosition at the clamp point, but the effect on ruby
had not been tested in that CL.
Bug: 40336192
Change-Id: I95fe796bb887d1d205dd43c2644095b6c6f225e2
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5695646
Reviewed-by: Kent Tamura tkent@chromium.org
Reviewed-by: Ian Kilpatrick ikilpatrick@chromium.org
Commit-Queue: Andreu Botella abotella@igalia.com
Cr-Commit-Position: refs/heads/main@{#1326551}