[webkit-changes] [WebKit/WebKit] 90c720: [GFC] Support grid-auto-rows and grid-auto-columns.

[Yulun Wu]

  Branch: refs/heads/main
  Home:   https://github.com/WebKit/WebKit
  Commit: 90c720db505f37998e04c5ffa0f440343a2fcd3e
      
https://github.com/WebKit/WebKit/commit/90c720db505f37998e04c5ffa0f440343a2fcd3e
  Author: Yulun Wu <yulun...@apple.com>
  Date:   2026-02-12 (Thu, 12 Feb 2026)

  Changed paths:
    M Source/WebCore/layout/formattingContexts/grid/GridFormattingContext.cpp
    M Source/WebCore/layout/formattingContexts/grid/GridFormattingContext.h
    M Source/WebCore/layout/formattingContexts/grid/GridLayout.cpp
    M Source/WebCore/layout/formattingContexts/grid/GridLayout.h
    M Source/WebCore/layout/integration/grid/LayoutIntegrationGridCoverage.cpp

  Log Message:
  -----------
  [GFC] Support grid-auto-rows and grid-auto-columns.
https://bugs.webkit.org/show_bug.cgi?id=307648
<rdar://170207049>

Reviewed by Sammy Gill.

This PR adds support for grid-auto-rows and grid-auto-columns.

    Style::GridTrackSizes gridAutoColumns;
    Style::GridTrackSizes gridAutoRows;

have been added to the GridDefinition and are used to size implicit
rows/columns that are constructed during layout.

* Source/WebCore/layout/formattingContexts/grid/GridFormattingContext.cpp:
(WebCore::Layout::GridFormattingContext::layout):
(WebCore::Layout::GridFormattingContext::computeIntrinsicWidths):
* Source/WebCore/layout/formattingContexts/grid/GridFormattingContext.h:
* Source/WebCore/layout/formattingContexts/grid/GridLayout.cpp:
(WebCore::Layout::GridLayout::layout):
(WebCore::Layout::GridLayout::generateImplicitTrackSizingFunctions):
(WebCore::Layout::GridLayout::trackSizingFunctions):
* Source/WebCore/layout/formattingContexts/grid/GridLayout.h:
* Source/WebCore/layout/integration/grid/LayoutIntegrationGridCoverage.cpp:
(WebCore::LayoutIntegration::gridLayoutAvoidanceReason):

Canonical link: https://commits.webkit.org/307412@main



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