tree bcda82db46be1ba103c4f0c4c50aca3bd211ac33
parent 4c34fd4105af29e9dca2d6794c1aa236df501c63
author zalan@apple.com <zalan@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1575569402 +0000
committer zalan@apple.com <zalan@apple.com@268f45cc-cd09-0410-ab3c-d52691b4dbfc> 1575569402 +0000

[LFC][IFC] Trim trailing letter-spacing at inline container boundary
https://bugs.webkit.org/show_bug.cgi?id=204895
<rdar://problem/57666898>

Reviewed by Antti Koivisto.

According to https://www.w3.org/TR/css-text-3/#letter-spacing-property, "An inline box only
includes letter spacing between characters completely contained within that element".
This patch enables this behavior by trimming the trailing letter spacing at [container end].

<div>1<span style="letter-spacing: 100px;">2</span>3</div> ->
[1][container start][2][container end][3]
vs.
[1][container start][2<-----100px----->][container end][3]

* layout/inlineformatting/InlineLineBuilder.cpp:
(WebCore::Layout::LineBuilder::removeTrailingTrimmableContent):
(WebCore::Layout::LineBuilder::appendInlineContainerEnd):
(WebCore::Layout::LineBuilder::TrimmableContent::trim):
(WebCore::Layout::LineBuilder::TrimmableContent::trimTrailingRun):
* layout/inlineformatting/InlineLineBuilder.h:
(WebCore::Layout::LineBuilder::TrimmableContent::isTrailingRunPartiallyTrimmable const):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@253154 268f45cc-cd09-0410-ab3c-d52691b4dbfc