Fix table column width distribution for colspan with mixed percent and auto columns

[Ahmad-S792]

efd90e2

Fix table column width distribution for colspan with mixed percent and auto columns
https://bugs.webkit.org/show_bug.cgi?id=303263
rdar://165561401

Reviewed by NOBODY (OOPS!).

This patch aligns WebKit with Chromium / Blink and Gecko / Firefox.

When a table has a row with mixed percentage and auto width columns, and
another row with a colspan spanning those columns, the auto column's width
was incorrectly negating the percentage constraint. This caused the width
distribution to be based solely on content width rather than respecting the
percentage values.

The issue occurred in AutoTableLayout::calcEffectiveLogicalWidth() when
distributing the colspan cell's min/max widths. The code had separate paths
for all-fixed columns and all-percent columns, but no proper handling for
mixed percent+auto columns.
The fix adds a new branch that detects when we have mixed percentage and
auto columns. By this point in the code, the earlier percentage distribution
logic has already converted auto columns to effective percentage widths. The
new code calculates the total effective percentage and distributes the
colspan's min/max widths proportionally based on these percentages, similar
to the existing all-percent case.

This ensures that a 90% column and an auto column (converted to ~10%)
receive width in a 90:10 ratio from the spanning cell, properly respecting
the percentage constraint.

Tests: imported/w3c/web-platform-tests/css/css-tables/table-colspan-percent-auto-ref.html
       imported/w3c/web-platform-tests/css/css-tables/table-colspan-percent-auto.html
* LayoutTests/imported/w3c/web-platform-tests/css/css-tables/table-colspan-percent-auto-expected.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/css/css-tables/table-colspan-percent-auto-ref.html: Added.
* LayoutTests/imported/w3c/web-platform-tests/css/css-tables/table-colspan-percent-auto.html: Added.
* Source/WebCore/rendering/AutoTableLayout.cpp:
(WebCore::AutoTableLayout::calcEffectiveLogicalWidth):

> Rebaselines:
* LayoutTests/platform/gtk/fast/table/003-expected.txt:
* LayoutTests/platform/mac-sequoia-wk1/fast/table/003-expected.txt:
* LayoutTests/platform/mac-sequoia-wk2/fast/table/003-expected.txt:
* LayoutTests/platform/mac-sonoma-wk1/fast/table/003-expected.txt:
* LayoutTests/platform/mac-wk1/fast/table/003-expected.txt:
* LayoutTests/platform/mac-wk2/fast/table/003-expected.txt:
* LayoutTests/platform/mac/fast/table/003-expected.txt:
* LayoutTests/platform/wpe/fast/table/003-expected.txt:

efd90e2

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests	✅ 🛠 mac-apple
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	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	⏳ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

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EWS run on previous version of this PR (hash 28475a9)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	❌ 🧪 wpe-wk2	✅ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	⏳ 🛠 wpe-cairo
	✅ 🧪 api-ios	❌ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	❌ 🧪 mac-wk2	❌ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	❌ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

[Ahmad-S792]

From quick testing, it fixes all these bugs:
https://bugs.webkit.org/show_bug.cgi?id=3820
https://bugs.webkit.org/show_bug.cgi?id=100279
https://bugs.webkit.org/show_bug.cgi?id=13598
https://bugs.webkit.org/show_bug.cgi?id=32744
https://bugs.webkit.org/show_bug.cgi?id=45111
https://bugs.webkit.org/show_bug.cgi?id=53065
https://bugs.webkit.org/show_bug.cgi?id=121113

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✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	❌ 🧪 api-mac-debug	⏳ 🛠 wpe-cairo
	✅ 🧪 api-ios	❌ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	❌ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	❌ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	❌ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

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EWS run on previous version of this PR (hash 36e210b)

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✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	⏳ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	❌ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

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EWS run on previous version of this PR (hash aca72d5)

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✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	❌ 🧪 api-mac-debug	⏳ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	❌ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim

[webkit-early-warning-system]

EWS run on current version of this PR (hash efd90e2)

Details

Misc	iOS, visionOS, tvOS & watchOS	macOS	Linux	Windows	Apple Internal
✅ 🧪 style	✅ 🛠 ios	✅ 🛠 mac	✅ 🛠 wpe	✅ 🛠 win	✅ 🛠 ios-apple
✅ 🧪 bindings	✅ 🛠 ios-sim	✅ 🛠 mac-AS-debug	✅ 🧪 wpe-wk2	✅ 🧪 win-tests	✅ 🛠 mac-apple
✅ 🧪 webkitperl	✅ 🧪 ios-wk2	✅ 🧪 api-mac	✅ 🧪 api-wpe		✅ 🛠 vision-apple
	✅ 🧪 ios-wk2-wpt	✅ 🧪 api-mac-debug	⏳ 🛠 wpe-cairo
	✅ 🧪 api-ios	✅ 🧪 mac-wk1	✅ 🛠 gtk
	✅ 🛠 vision	✅ 🧪 mac-wk2	✅ 🧪 gtk-wk2
	✅ 🛠 vision-sim	✅ 🧪 mac-AS-debug-wk2	✅ 🧪 api-gtk
	✅ 🧪 vision-wk2	✅ 🧪 mac-wk2-stress	✅ 🛠 playstation
	✅ 🛠 tv	✅ 🧪 mac-intel-wk2
	✅ 🛠 tv-sim	✅ 🛠 mac-safer-cpp
	✅ 🛠 watch
	✅ 🛠 watch-sim