static GridSpan definiteGridSpanWithNamedLineSpanAgainstOpposite(int oppositeLine, const GridPosition& position, GridPositionSide side, unsigned lastLine, NamedLineCollection& linesCollection)
{
int start, end;
if (side == RowStartSide || side == ColumnStartSide) {
start = lookBackForNamedGridLine(oppositeLine - 1, position.spanPosition(), lastLine, linesCollection);
end = oppositeLine;
} else {
start = oppositeLine;
end = lookAheadForNamedGridLine(oppositeLine + 1, position.spanPosition(), lastLine, linesCollection);
}
return GridSpan::untranslatedDefiniteGridSpan(start, end);
}
static GridSpan resolveNamedGridLinePositionAgainstOppositePosition(const RenderStyle& gridContainerStyle, int oppositeLine, const GridPosition& position, GridPositionSide side, unsigned autoRepeatTracksCount)
{
ASSERT(position.isSpan());
ASSERT(!position.namedGridLine().isNull());
// Negative positions are not allowed per the specification and should have been handled during parsing.
ASSERT(position.spanPosition() > 0);
unsigned lastLine = explicitGridSizeForSide(gridContainerStyle, side, autoRepeatTracksCount);
NamedLineCollection linesCollection(gridContainerStyle, position.namedGridLine(), directionFromSide(side), lastLine, autoRepeatTracksCount);
return definiteGridSpanWithNamedLineSpanAgainstOpposite(oppositeLine, position, side, lastLine, linesCollection);
}
std::unique_ptr<GridSpan> GridResolvedPosition::resolveGridPositionAgainstOppositePosition(const RenderStyle& gridContainerStyle, const GridResolvedPosition& resolvedOppositePosition, const GridPosition& position, GridPositionSide side)
{
if (position.isAuto())
return std::make_unique<GridSpan>(resolvedOppositePosition, resolvedOppositePosition);
ASSERT(position.isSpan());
ASSERT(position.spanPosition() > 0);
if (!position.namedGridLine().isNull()) {
// span 2 'c' -> we need to find the appropriate grid line before / after our opposite position.
return resolveNamedGridLinePositionAgainstOppositePosition(gridContainerStyle, resolvedOppositePosition, position, side);
}
// 'span 1' is contained inside a single grid track regardless of the direction.
// That's why the CSS span value is one more than the offset we apply.
size_t positionOffset = position.spanPosition() - 1;
if (isStartSide(side)) {
size_t initialResolvedPosition = std::max<int>(0, resolvedOppositePosition.toInt() - positionOffset);
return std::make_unique<GridSpan>(initialResolvedPosition, resolvedOppositePosition);
}
return std::make_unique<GridSpan>(resolvedOppositePosition, resolvedOppositePosition.toInt() + positionOffset);
}
static GridSpan resolveGridPositionAgainstOppositePosition(const RenderStyle& gridContainerStyle, int oppositeLine, const GridPosition& position, GridPositionSide side, unsigned autoRepeatTracksCount)
{
if (position.isAuto()) {
if (isStartSide(side))
return GridSpan::untranslatedDefiniteGridSpan(oppositeLine - 1, oppositeLine);
return GridSpan::untranslatedDefiniteGridSpan(oppositeLine, oppositeLine + 1);
}
ASSERT(position.isSpan());
ASSERT(position.spanPosition() > 0);
if (!position.namedGridLine().isNull()) {
// span 2 'c' -> we need to find the appropriate grid line before / after our opposite position.
return resolveNamedGridLinePositionAgainstOppositePosition(gridContainerStyle, oppositeLine, position, side, autoRepeatTracksCount);
}
// 'span 1' is contained inside a single grid track regardless of the direction.
// That's why the CSS span value is one more than the offset we apply.
unsigned positionOffset = position.spanPosition();
if (isStartSide(side))
return GridSpan::untranslatedDefiniteGridSpan(oppositeLine - positionOffset, oppositeLine);
return GridSpan::untranslatedDefiniteGridSpan(oppositeLine, oppositeLine + positionOffset);
}
PassOwnPtr<GridSpan> GridResolvedPosition::resolveGridPositionAgainstOppositePosition(const RenderStyle& gridContainerStyle, const GridResolvedPosition& resolvedOppositePosition, const GridPosition& position, GridPositionSide side)
{
if (position.isAuto())
return GridSpan::create(resolvedOppositePosition, resolvedOppositePosition);
ASSERT(position.isSpan());
ASSERT(position.spanPosition() > 0);
if (!position.namedGridLine().isNull()) {
// span 2 'c' -> we need to find the appropriate grid line before / after our opposite position.
return resolveNamedGridLinePositionAgainstOppositePosition(gridContainerStyle, resolvedOppositePosition, position, side);
}
return GridSpan::createWithSpanAgainstOpposite(resolvedOppositePosition, position, side);
}
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();
}
PassOwnPtr<GridSpan> GridResolvedPosition::resolveNamedGridLinePositionAgainstOppositePosition(const RenderStyle& gridContainerStyle, const GridResolvedPosition& resolvedOppositePosition, const GridPosition& position, GridPositionSide side)
{
ASSERT(position.isSpan());
ASSERT(!position.namedGridLine().isNull());
// Negative positions are not allowed per the specification and should have been handled during parsing.
ASSERT(position.spanPosition() > 0);
const NamedGridLinesMap& gridLinesNames = (side == ColumnStartSide || side == ColumnEndSide) ? gridContainerStyle.namedGridColumnLines() : gridContainerStyle.namedGridRowLines();
NamedGridLinesMap::const_iterator it = gridLinesNames.find(position.namedGridLine());
// If there is no named grid line of that name, we resolve the position to 'auto' (which is equivalent to 'span 1' in this case).
// See http://lists.w3.org/Archives/Public/www-style/2013Jun/0394.html.
if (it == gridLinesNames.end())
return GridSpan::create(resolvedOppositePosition, resolvedOppositePosition);
return GridSpan::createWithNamedSpanAgainstOpposite(resolvedOppositePosition, position, side, it->value);
}
GridSpan GridResolvedPosition::resolveGridPositionAgainstOppositePosition(const ComputedStyle& gridContainerStyle, const GridResolvedPosition& resolvedOppositePosition, const GridPosition& position, GridPositionSide side)
{
if (position.isAuto()) {
if ((side == ColumnStartSide || side == RowStartSide) && resolvedOppositePosition.toInt())
return GridSpan::definiteGridSpan(resolvedOppositePosition.prev(), resolvedOppositePosition);
return GridSpan::definiteGridSpan(resolvedOppositePosition, resolvedOppositePosition.next());
}
ASSERT(position.isSpan());
ASSERT(position.spanPosition() > 0);
if (!position.namedGridLine().isNull()) {
// span 2 'c' -> we need to find the appropriate grid line before / after our opposite position.
return resolveNamedGridLinePositionAgainstOppositePosition(gridContainerStyle, resolvedOppositePosition, position, side);
}
return GridSpan::definiteGridSpanWithSpanAgainstOpposite(resolvedOppositePosition, position, side);
}
std::unique_ptr<GridSpan> GridResolvedPosition::resolveRowEndColumnEndNamedGridLinePositionAgainstOppositePosition(const GridResolvedPosition& resolvedOppositePosition, const GridPosition& position, const Vector<size_t>& gridLines)
{
size_t firstLineAfterOppositePositionIndex = gridLines.size() - 1;
const size_t* firstLineAfterOppositePosition = std::upper_bound(gridLines.begin(), gridLines.end(), resolvedOppositePosition);
if (firstLineAfterOppositePosition != gridLines.end())
firstLineAfterOppositePositionIndex = firstLineAfterOppositePosition - gridLines.begin();
size_t gridLineIndex = std::min(gridLines.size() - 1, firstLineAfterOppositePositionIndex + position.spanPosition() - 1);
GridResolvedPosition resolvedGridLinePosition = GridResolvedPosition::adjustGridPositionForRowEndColumnEndSide(gridLines[gridLineIndex]);
if (resolvedGridLinePosition < resolvedOppositePosition)
resolvedGridLinePosition = resolvedOppositePosition;
return std::make_unique<GridSpan>(resolvedOppositePosition, resolvedGridLinePosition);
}
std::unique_ptr<GridSpan> GridResolvedPosition::resolveRowStartColumnStartNamedGridLinePositionAgainstOppositePosition(const GridResolvedPosition& resolvedOppositePosition, const GridPosition& position, const Vector<size_t>& gridLines)
{
size_t gridLineIndex = std::max<int>(0, firstNamedGridLineBeforePosition(resolvedOppositePosition.toInt(), gridLines) - position.spanPosition() + 1);
GridResolvedPosition resolvedGridLinePosition = GridResolvedPosition(gridLines[gridLineIndex]);
if (resolvedGridLinePosition > resolvedOppositePosition)
resolvedGridLinePosition = resolvedOppositePosition;
return std::make_unique<GridSpan>(resolvedGridLinePosition, resolvedOppositePosition);
}
