[webkit-changes] [WebKit/WebKit] 15030f: [IFC][initial letter] Initial letter float box use...

[Alan Baradlay]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 15030f5e89a8bf437e765e936c0526580b042a27
      https://github.com/WebKit/WebKit/commit/15030f5e89a8bf437e765e936c0526580b042a27
  Author: Alan Baradlay <zalan at apple.com>
  Date:   2023-01-07 (Sat, 07 Jan 2023)

  Changed paths:
    M Source/WebCore/layout/formattingContexts/inline/InlineFormattingQuirks.cpp
    M Source/WebCore/layout/formattingContexts/inline/InlineFormattingQuirks.h
    M Source/WebCore/layout/formattingContexts/inline/InlineLineBuilder.cpp

  Log Message:
  -----------
  [IFC][initial letter] Initial letter float box uses adjusted initial vertical position
https://bugs.webkit.org/show_bug.cgi?id=250254

Reviewed by Antti Koivisto.

-webkit-initial-letter is a float based implementation where the initial-letter box behaves as a float.
In this patch we adjust the static position of this float box (this is the vertical position the float can't get higher)
so that it stays in flush with the rest of the line's capHeight metric.

* Source/WebCore/layout/formattingContexts/inline/InlineFormattingQuirks.cpp:
(WebCore::Layout::InlineFormattingQuirks::initialLetterAlignmentOffset const):
* Source/WebCore/layout/formattingContexts/inline/InlineFormattingQuirks.h:
* Source/WebCore/layout/formattingContexts/inline/InlineLineBuilder.cpp:
(WebCore::Layout::LineBuilder::tryPlacingFloatBox):

Canonical link: https://commits.webkit.org/258618@main