GridSpan GridPositionsResolver::resolveGridPositionsFromStyle(const RenderStyle& gridContainerStyle, const RenderBox& gridItem, GridTrackSizingDirection direction, unsigned autoRepeatTracksCount)
{
GridPosition initialPosition, finalPosition;
adjustGridPositionsFromStyle(gridContainerStyle, gridItem, direction, initialPosition, finalPosition);
GridPositionSide initialSide = initialPositionSide(direction);
GridPositionSide finalSide = finalPositionSide(direction);
// We can't get our grid positions without running the auto placement algorithm.
if (initialPosition.shouldBeResolvedAgainstOppositePosition() && finalPosition.shouldBeResolvedAgainstOppositePosition())
return GridSpan::indefiniteGridSpan();
if (initialPosition.shouldBeResolvedAgainstOppositePosition()) {
// Infer the position from the final position ('auto / 1' or 'span 2 / 3' case).
auto endLine = resolveGridPositionFromStyle(gridContainerStyle, finalPosition, finalSide, autoRepeatTracksCount);
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, endLine, initialPosition, initialSide, autoRepeatTracksCount);
}
if (finalPosition.shouldBeResolvedAgainstOppositePosition()) {
// Infer our position from the initial position ('1 / auto' or '3 / span 2' case).
auto startLine = resolveGridPositionFromStyle(gridContainerStyle, initialPosition, initialSide, autoRepeatTracksCount);
return resolveGridPositionAgainstOppositePosition(gridContainerStyle, startLine, finalPosition, finalSide, autoRepeatTracksCount);
}
int startLine = resolveGridPositionFromStyle(gridContainerStyle, initialPosition, initialSide, autoRepeatTracksCount);
int endLine = resolveGridPositionFromStyle(gridContainerStyle, finalPosition, finalSide, autoRepeatTracksCount);
if (startLine > endLine)
std::swap(startLine, endLine);
else if (startLine == endLine)
endLine = startLine + 1;
return GridSpan::untranslatedDefiniteGridSpan(startLine, std::max(startLine, endLine));
}
unsigned GridPositionsResolver::spanSizeForAutoPlacedItem(const RenderStyle& gridContainerStyle, const RenderBox& gridItem, GridTrackSizingDirection direction)
{
GridPosition initialPosition, finalPosition;
adjustGridPositionsFromStyle(gridContainerStyle, gridItem, direction, initialPosition, finalPosition);
// This method will only be used when both positions need to be resolved against the opposite one.
ASSERT(initialPosition.shouldBeResolvedAgainstOppositePosition() && finalPosition.shouldBeResolvedAgainstOppositePosition());
if (initialPosition.isAuto() && finalPosition.isAuto())
return 1;
GridPosition position = initialPosition.isSpan() ? initialPosition : finalPosition;
ASSERT(position.isSpan());
ASSERT(position.spanPosition());
return position.spanPosition();
}
GridSpan GridResolvedPosition::resolveGridPositionsFromAutoPlacementPosition(const RenderStyle& gridContainerStyle, const RenderBox& gridItem, GridTrackSizingDirection direction, const GridResolvedPosition& resolvedInitialPosition)
{
GridPosition initialPosition = (direction == ForColumns) ? gridItem.style().gridItemColumnStart() : gridItem.style().gridItemRowStart();
const GridPositionSide initialPositionSide = (direction == ForColumns) ? ColumnStartSide : RowStartSide;
GridPosition finalPosition = (direction == ForColumns) ? gridItem.style().gridItemColumnEnd() : gridItem.style().gridItemRowEnd();
const GridPositionSide finalPositionSide = (direction == ForColumns) ? ColumnEndSide : RowEndSide;
adjustGridPositionsFromStyle(gridContainerStyle, initialPosition, finalPosition, initialPositionSide, finalPositionSide);
// 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;
if (initialPosition.isSpan())
resolvedFinalPosition = resolveGridPositionAgainstOppositePosition(gridContainerStyle, resolvedInitialPosition, initialPosition, finalPositionSide)->resolvedFinalPosition;
else if (finalPosition.isSpan())
resolvedFinalPosition = resolveGridPositionAgainstOppositePosition(gridContainerStyle, resolvedInitialPosition, finalPosition, finalPositionSide)->resolvedFinalPosition;
return GridSpan(resolvedInitialPosition, resolvedFinalPosition);
}
std::unique_ptr<GridSpan> GridResolvedPosition::resolveGridPositionsFromStyle(const RenderStyle& gridContainerStyle, const RenderBox& gridItem, GridTrackSizingDirection direction)
{
GridPosition initialPosition = (direction == ForColumns) ? gridItem.style().gridItemColumnStart() : gridItem.style().gridItemRowStart();
const GridPositionSide initialPositionSide = (direction == ForColumns) ? ColumnStartSide : RowStartSide;
GridPosition finalPosition = (direction == ForColumns) ? gridItem.style().gridItemColumnEnd() : gridItem.style().gridItemRowEnd();
const GridPositionSide finalPositionSide = (direction == ForColumns) ? ColumnEndSide : RowEndSide;
adjustGridPositionsFromStyle(gridContainerStyle, initialPosition, finalPosition, initialPositionSide, finalPositionSide);
if (initialPosition.shouldBeResolvedAgainstOppositePosition() && finalPosition.shouldBeResolvedAgainstOppositePosition()) {
if (gridContainerStyle.gridAutoFlow() == AutoFlowNone)
return std::make_unique<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).
const 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).
const 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-row-end' specifies a line at or before that specified by 'grid-row-start', it computes to 'span 1'.
if (resolvedFinalPosition < resolvedInitialPosition)
resolvedFinalPosition = resolvedInitialPosition;
return std::make_unique<GridSpan>(resolvedInitialPosition, resolvedFinalPosition);
}
