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/*
* Copyright (C) 2022 Apple Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#pragma once
#include "GridArea.h"
#include "GridPositionsResolver.h"
#include "LayoutUnit.h"
#include "RenderBox.h"
namespace WebCore {
class RenderGrid;
class GridMasonryLayout {
public:
GridMasonryLayout(RenderGrid& renderGrid)
: m_renderGrid(renderGrid)
{
}
void initializeMasonry(unsigned gridAxisTracks, GridTrackSizingDirection masonryAxisDirection);
void performMasonryPlacement(unsigned gridAxisTracks, GridTrackSizingDirection masonryAxisDirection);
LayoutUnit offsetForChild(const RenderBox&) const;
LayoutUnit gridContentSize() const { return m_gridContentSize; };
LayoutUnit gridGap() const { return m_masonryAxisGridGap; };
private:
GridSpan gridAxisPositionUsingPackAutoFlow(const RenderBox& item) const;
GridSpan gridAxisPositionUsingNextAutoFlow(const RenderBox& item);
GridArea gridAreaForIndefiniteGridAxisItem(const RenderBox& item);
GridArea gridAreaForDefiniteGridAxisItem(const RenderBox&) const;
void collectMasonryItems();
void addItemsToFirstTrack();
void placeItemsUsingOrderModifiedDocumentOrder();
void placeItemsWithDefiniteGridAxisPosition();
void placeItemsWithIndefiniteGridAxisPosition();
void setItemGridAxisContainingBlockToGridArea(RenderBox&);
void insertIntoGridAndLayoutItem(RenderBox&, const GridArea&);
void resizeAndResetRunningPositions();
void allocateCapacityForMasonryVectors();
LayoutUnit masonryAxisMarginBoxForItem(const RenderBox& child);
void updateRunningPositions(const RenderBox& child, const GridArea&);
void updateItemOffset(const RenderBox& child, LayoutUnit offset);
inline GridTrackSizingDirection gridAxisDirection() const;
bool hasDefiniteGridAxisPosition(const RenderBox& child, GridTrackSizingDirection masonryDirection) const;
static bool itemGridAreaStartsAtFirstLine(const GridArea& area, GridTrackSizingDirection masonryDirection)
{
return !(masonryDirection == ForRows ? area.rows.startLine() : area.columns.startLine());
}
GridArea masonryGridAreaFromGridAxisSpan(const GridSpan&) const;
GridSpan gridAxisSpanFromArea(const GridArea&) const;
bool hasEnoughSpaceAtPosition(unsigned startingPosition, unsigned spanLength) const;
unsigned m_gridAxisTracksCount;
HashMap<RenderBox*, GridArea> m_firstTrackItems;
Vector<RenderBox*> m_itemsWithDefiniteGridAxisPosition;
Vector<RenderBox*> m_itemsWithIndefiniteGridAxisPosition;
Vector<LayoutUnit> m_runningPositions;
HashMap<const RenderBox*, LayoutUnit> m_itemOffsets;
RenderGrid& m_renderGrid;
LayoutUnit m_masonryAxisGridGap;
LayoutUnit m_gridContentSize;
GridTrackSizingDirection m_masonryAxisDirection;
const GridSpan m_masonryAxisSpan = GridSpan::masonryAxisTranslatedDefiniteGridSpan();
// These values are based on best estimate. They may need to be updated based
// on common behavior seen on websites.
const unsigned m_masonryDefiniteItemsQuarterCapacity = 4;
const unsigned m_masonryIndefiniteItemsHalfCapacity = 2;
unsigned m_autoFlowNextCursor;
};
} // end namespace WebCore
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