commit e6765d2a5bb918635334f49b355a6a72f77b8255
author Andreu Botella <abotella@igalia.com> Thu Apr 03 05:34:43 2025
committer Chromium LUCI CQ <chromium-scoped@luci-project-accounts.iam.gserviceaccount.com> Thu Apr 03 05:34:43 2025
tree 4ce483fb6ad3ad0b70f94603f00cf73e67268dc9
parent a9d629f45789581159d456c1c9e59f904d4c5cde

[line-clamp] Allow inserting the ellipsis inside nowrap text

With the `CSSLineClampLineBreakingEllipsis` runtime feature on, the
ellipsis width computation happens as part of line breaking, so that
the ellipsis gets inserted at the last possible break opportunity.
However, this currently does not work with `text-wrap: nowrap` text,
because regular line breaking would not wrap inside that text, but
there are still break opportunities in it that must be used when
clamping.

This patch replaces any calls to the `ComputedStyle` methods
`ShouldWrapLine` and `ShouldBreakOnlyAfterWhiteSpace` with equivalent
methods in `ComputedStyle` that also check whether the line is being
ellipsized for line-clamp; and replaces any such calls inside
`LineBreaker` to use them. This is enough to cover the spec's
requirements, which explicitly ignore break opportunities created by
`overflow-wrap`.

This patch also fixes the removal of trailing spaces so that when an
ellipsis is inserted inside `white-space: pre` text, there are no
preserved spaces between the end of the word and the ellipsis (see
https://github.com/w3c/csswg-drafts/issues/12008).

Bug: 40336192
Change-Id: I22822d5f1d6a44e5b5c5b99a9fb698df10ffcf9c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6394977
Commit-Queue: Andreu Botella <abotella@igalia.com>
Reviewed-by: Koji Ishii <kojii@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1441973}