GridPlacement

Remarks

⚠ Line 0 does not exist. CSS Grid §8.3 numbers lines from 1 at the start edge of the explicit grid and from −1 at its end edge, with no zero between them, so a declared 0 is invalid and computes to auto. The corpus never writes one — its 6 636 placement values are all -?<int> or span <int> and none is 0 — so this rule is one of the ones no fixture can see, and GridPlacementTests holds it instead.

⚠ A negative line is relative to the explicit grid, not the final one. §8.3 resolves -1 against the end of the explicit grid before any implicit track exists, which means adding an implicit column on the right does not move what -1 pointed at. Resolving it against the final grid instead is self-referential — the grid's size depends on the placement that depends on the grid's size — and it is the bug that makes a -1 item drift as its siblings are added.

Fields and properties (4)

• public GridPlacementKind Kind

  Which of the three forms this is.

• public int Value

  The line number, or the span count. Meaningless for Auto.

• public static readonly GridPlacement Auto

  Auto-placement decides. The initial value of all four properties.

• public bool IsAuto

  Whether auto-placement decides this edge.

Methods (6)

• public GridPlacement(GridPlacementKind Kind, int Value)

  One of an item's four placement properties.

• public static GridPlacement Line(int line)

  A numbered line.

• public static GridPlacement Span(int tracks)

  A number of tracks from the opposite edge.

• public override string ToString()

  Returns the fully qualified type name of this instance.

• public static bool TryParse(ReadOnlySpan<char> value, out GridPlacement placement)

  Reads one grid-{row,column}-{start,end} value.

• public static bool TryParseShorthand(ReadOnlySpan<char> value, out GridPlacement start, out GridPlacement end)

  Reads a grid-column or grid-row shorthand.

Used by (8)

• GridBlindSpotTestsVixen.Ui.Layout.Tests
• GridTemplateAreasTestsVixen.Ui.Layout.Tests
• LayoutStyleVixen.Ui.Layout
• LayoutStyleBuilderVixen.Ui
• LayoutTreeVixen.Ui.Layout
• NamedPlacementPropertyVixen.Ui
• TaffyStyleMapVixen.Ui.Layout.Tests
• TransferredSizeTestsVixen.Ui.Layout.Tests