GridSpan GridResolvedPosition::resolveGridPositionsFromStyle(const ComputedStyle& gridContainerStyle, const LayoutBox& gridItem, GridTrackSizingDirection direction)
{
GridPosition initialPosition, finalPosition;
initialAndFinalPositionsFromStyle(gridContainerStyle, gridItem, direction, initialPosition, finalPosition);
GridPositionSide initialSide = initialPositionSide(direction);
GridPositionSide finalSide = finalPositionSide(direction);
if (initialPosition.shouldBeResolvedAgainstOppositePosition() && finalPosition.shouldBeResolvedAgainstOppositePosition()) {
// We can't get our grid positions without running the auto placement algorithm.
return GridSpan::indefiniteGridSpan();
}
if (initialPosition.shouldBeResolvedAgainstOppositePosition()) {
// Infer the position from the final position ('auto / 1' or 'span 2 / 3' case).
GridResolvedPosition finalResolvedPosition = resolveGridPositionFromStyle(gridContainerStyle, finalPosition, finalSide);
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, finalResolvedPosition, initialPosition, initialSide);
}
if (finalPosition.shouldBeResolvedAgainstOppositePosition()) {
// Infer our position from the initial position ('1 / auto' or '3 / span 2' case).
GridResolvedPosition initialResolvedPosition = resolveGridPositionFromStyle(gridContainerStyle, initialPosition, initialSide);
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, initialResolvedPosition, finalPosition, finalSide);
}
GridResolvedPosition resolvedInitialPosition = resolveGridPositionFromStyle(gridContainerStyle, initialPosition, initialSide);
GridResolvedPosition resolvedFinalPosition = resolveGridPositionFromStyle(gridContainerStyle, finalPosition, finalSide);
// If 'grid-after' specifies a line at or before that specified by 'grid-before', it computes to 'span 1'.
if (resolvedFinalPosition <= resolvedInitialPosition)
resolvedFinalPosition = resolvedInitialPosition.next();
return GridSpan::definiteGridSpan(resolvedInitialPosition, resolvedFinalPosition);
}
GridSpan GridResolvedPosition::resolveGridPositionsFromAutoPlacementPosition(const ComputedStyle& gridContainerStyle, const LayoutBox& gridItem, GridTrackSizingDirection direction, const GridResolvedPosition& resolvedInitialPosition)
{
GridPosition initialPosition, finalPosition;
initialAndFinalPositionsFromStyle(gridContainerStyle, gridItem, direction, initialPosition, finalPosition);
GridPositionSide finalSide = finalPositionSide(direction);
// This method will only be used when both positions need to be resolved against the opposite one.
ASSERT(initialPosition.shouldBeResolvedAgainstOppositePosition() && finalPosition.shouldBeResolvedAgainstOppositePosition());
GridResolvedPosition resolvedFinalPosition = resolvedInitialPosition.next();
if (initialPosition.isSpan())
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, resolvedInitialPosition, initialPosition, finalSide);
if (finalPosition.isSpan())
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, resolvedInitialPosition, finalPosition, finalSide);
return GridSpan::definiteGridSpan(resolvedInitialPosition, resolvedFinalPosition);
}
PassOwnPtr<GridSpan> GridResolvedPosition::resolveGridPositionsFromStyle(const RenderStyle& gridContainerStyle, const RenderBox& gridItem, GridTrackSizingDirection direction)
{
GridPosition initialPosition, finalPosition;
initialAndFinalPositionsFromStyle(gridContainerStyle, gridItem, direction, initialPosition, finalPosition);
GridPositionSide initialPositionSide = calculateInitialPositionSide(direction);
GridPositionSide finalPositionSide = calculateFinalPositionSide(direction);
if (initialPosition.shouldBeResolvedAgainstOppositePosition() && finalPosition.shouldBeResolvedAgainstOppositePosition()) {
// FIXME: Implement properly "stack" value in auto-placement algorithm.
if (gridContainerStyle.isGridAutoFlowAlgorithmStack())
return adoptPtr(new GridSpan(0, 0));
// We can't get our grid positions without running the auto placement algorithm.
return nullptr;
}
if (initialPosition.shouldBeResolvedAgainstOppositePosition()) {
// Infer the position from the final position ('auto / 1' or 'span 2 / 3' case).
GridResolvedPosition finalResolvedPosition = resolveGridPositionFromStyle(gridContainerStyle, finalPosition, finalPositionSide);
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, finalResolvedPosition, initialPosition, initialPositionSide);
}
if (finalPosition.shouldBeResolvedAgainstOppositePosition()) {
// Infer our position from the initial position ('1 / auto' or '3 / span 2' case).
GridResolvedPosition initialResolvedPosition = resolveGridPositionFromStyle(gridContainerStyle, initialPosition, initialPositionSide);
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, initialResolvedPosition, finalPosition, finalPositionSide);
}
GridResolvedPosition resolvedInitialPosition = resolveGridPositionFromStyle(gridContainerStyle, initialPosition, initialPositionSide);
GridResolvedPosition resolvedFinalPosition = resolveGridPositionFromStyle(gridContainerStyle, finalPosition, finalPositionSide);
// If 'grid-after' specifies a line at or before that specified by 'grid-before', it computes to 'span 1'.
if (resolvedFinalPosition < resolvedInitialPosition)
resolvedFinalPosition = resolvedInitialPosition;
return adoptPtr(new GridSpan(resolvedInitialPosition, resolvedFinalPosition));
}