[LFC][IFC] Support each-line keyword in text-indent

[tuankiet65]

8ac6fb0

[LFC][IFC] Support each-line keyword in text-indent
https://bugs.webkit.org/show_bug.cgi?id=240731

Patch by Kiet Ho <tho22@apple.com > on 2022-05-25
Reviewed by Alan Bujtas.

Normally, text-indent only affects the first line. When 'each-line' is specified,
subsequent lines where the previous line ends with a hard break are also indented.
This is supported in the legacy layout engine but not in LFC. Adds support for
'each-line' to bring LFC to parity with the legacy engine.

Test: imported/w3c/web-platform-tests/css/css-text/text-indent/text-indent-each-line-hanging.html

* LayoutTests/TestExpectations: Remove ImageOnlyFailure expectation.
* Source/WebCore/layout/formattingContexts/inline/InlineLineBuilder.cpp:
(WebCore::Layout::LineBuilder::layoutInlineContent):
(WebCore::Layout::LineBuilder::computedIntrinsicWidth):
(WebCore::Layout::LineBuilder::initialConstraintsForLine const): Add logic to
indent line when 'each-line' is specified, and the previous line ends with a
hard break.
* Source/WebCore/layout/formattingContexts/inline/InlineLineBuilder.h:
* Source/WebCore/layout/formattingContexts/inline/InlineLineBuilder.h: Modify
initialConstraintsForLine to accept information about the previous line,
not just whether there's one or not.

Canonical link: https://commits.webkit.org/250978@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@294828 268f45cc-cd09-0410-ab3c-d52691b4dbfc

[alanbaradlay]

This looks great!

[tuankiet65]

Difference before/after force push: account for the fact that the each-line and hanging test was migrated from WebKit repo to WPT.

[webkit-early-warning-system]

Committed r294828 (250978@main): https://commits.webkit.org/250978@main

Reviewed commits have been landed. Closing PR #852 and removing active labels.