Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: c9af451c45ddb76c864a157c7494cf4256d2e655
https://github.com/WebKit/WebKit/commit/c9af451c45ddb76c864a157c7494cf4256d2e655
Author: Karl Dubost <[email protected]>
Date: 2026-01-29 (Thu, 29 Jan 2026)
Changed paths:
A
LayoutTests/imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color-expected.html
A
LayoutTests/imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color-ref.html
A
LayoutTests/imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color.html
M Source/WebCore/rendering/RenderTableCell.cpp
Log Message:
-----------
Border collapse problem with rowspan/colspan cells
https://bugs.webkit.org/show_bug.cgi?id=5515
rdar://94163960
Reviewed by Alan Baradlay.
Currently for a table of 2 columns and 4 rows.
* the first column has a rowspan = 3
(so 2 cells with one covering the first 3 rows)
* the second column has 4 cells on 4 rows
When specifiying a different bottom border color for each first 3 rows,
WebKit is adopting the color of the first cell defined in the second
colum for the bottom color of the rowspanned cell instead of the color
of the third row like Gecko and Blink do.
This patch is fixing and only this. It doesn't fix the more general
issue for vertical border shared in between the rowspanned cell and the
second column cells.
This will need to be fixed in https://webkit.org/b/20260 as it requires
a larger architectural change on border segmenting.
This didn't have WPT tests before, this is adding one covering this
behavior.
Tests:
imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color-ref.html
imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color.html
*
LayoutTests/imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color-expected.html:
Added.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color-ref.html:
Added.
*
LayoutTests/imported/w3c/web-platform-tests/css/css-tables/rowspan-cell-border-after-color.html:
Added.
* Source/WebCore/rendering/RenderTableCell.cpp:
(WebCore::RenderTableCell::computeCollapsedAfterBorder const):
Canonical link: https://commits.webkit.org/306471@main
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