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)); }
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); }
static void adjustGridPositionsFromStyle(const RenderStyle& gridContainerStyle, const RenderBox& gridItem, GridTrackSizingDirection direction, GridPosition& initialPosition, GridPosition& finalPosition) { bool isForColumns = direction == ForColumns; initialPosition = isForColumns ? gridItem.style().gridItemColumnStart() : gridItem.style().gridItemRowStart(); finalPosition = isForColumns ? gridItem.style().gridItemColumnEnd() : gridItem.style().gridItemRowEnd(); // We must handle the placement error handling code here instead of in the StyleAdjuster because we don't want to // overwrite the specified values. if (initialPosition.isSpan() && finalPosition.isSpan()) finalPosition.setAutoPosition(); if (gridItem.isOutOfFlowPositioned()) { // Early detect the case of non existing named grid lines for positioned items. if (initialPosition.isNamedGridArea() && !NamedLineCollection::isValidNamedLineOrArea(initialPosition.namedGridLine(), gridContainerStyle, initialPositionSide(direction))) initialPosition.setAutoPosition(); if (finalPosition.isNamedGridArea() && !NamedLineCollection::isValidNamedLineOrArea(finalPosition.namedGridLine(), gridContainerStyle, finalPositionSide(direction))) finalPosition.setAutoPosition(); } // If the grid item has an automatic position and a grid span for a named line in a given dimension, instead treat the grid span as one. if (initialPosition.isAuto() && finalPosition.isSpan() && !finalPosition.namedGridLine().isNull()) finalPosition.setSpanPosition(1, String()); if (finalPosition.isAuto() && initialPosition.isSpan() && !initialPosition.namedGridLine().isNull()) initialPosition.setSpanPosition(1, String()); }
void GridResolvedPosition::initialAndFinalPositionsFromStyle(const ComputedStyle& gridContainerStyle, const LayoutBox& gridItem, GridTrackSizingDirection direction, GridPosition& initialPosition, GridPosition& finalPosition) { initialPosition = (direction == ForColumns) ? gridItem.style()->gridColumnStart() : gridItem.style()->gridRowStart(); finalPosition = (direction == ForColumns) ? gridItem.style()->gridColumnEnd() : gridItem.style()->gridRowEnd(); // We must handle the placement error handling code here instead of in the StyleAdjuster because we don't want to // overwrite the specified values. if (initialPosition.isSpan() && finalPosition.isSpan()) finalPosition.setAutoPosition(); // Try to early detect the case of non existing named grid lines. This way we could assume later that // GridResolvedPosition::resolveGrisPositionFromStyle() always return a valid resolved position. if (initialPosition.isNamedGridArea() && !isValidNamedLineOrArea(initialPosition.namedGridLine(), gridContainerStyle, initialPositionSide(direction))) initialPosition.setAutoPosition(); if (finalPosition.isNamedGridArea() && !isValidNamedLineOrArea(finalPosition.namedGridLine(), gridContainerStyle, finalPositionSide(direction))) finalPosition.setAutoPosition(); // If the grid item has an automatic position and a grid span for a named line in a given dimension, instead treat the grid span as one. if (initialPosition.isAuto() && finalPosition.isSpan() && !finalPosition.namedGridLine().isNull()) finalPosition.setSpanPosition(1, String()); if (finalPosition.isAuto() && initialPosition.isSpan() && !initialPosition.namedGridLine().isNull()) initialPosition.setSpanPosition(1, String()); }