1/*
2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 * Copyright (C) 2013-2017 Igalia S.L.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
15 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
18 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
19 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
20 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
21 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
22 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
24 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27#pragma once
28
29#include "Grid.h"
30#include "GridTrackSizingAlgorithm.h"
31#include "RenderBlock.h"
32
33namespace WebCore {
34
35class GridArea;
36class GridSpan;
37
38struct ContentAlignmentData {
39 WTF_MAKE_NONCOPYABLE(ContentAlignmentData); WTF_MAKE_FAST_ALLOCATED;
40public:
41 ContentAlignmentData() = default;
42 bool isValid() const { return positionOffset >= 0 && distributionOffset >= 0; }
43
44 LayoutUnit positionOffset;
45 LayoutUnit distributionOffset;
46};
47
48enum GridAxisPosition {GridAxisStart, GridAxisEnd, GridAxisCenter};
49
50class RenderGrid final : public RenderBlock {
51 WTF_MAKE_ISO_ALLOCATED(RenderGrid);
52public:
53 RenderGrid(Element&, RenderStyle&&);
54 virtual ~RenderGrid();
55
56 Element& element() const { return downcast<Element>(nodeForNonAnonymous()); }
57
58 void styleDidChange(StyleDifference, const RenderStyle* oldStyle) override;
59 void layoutBlock(bool relayoutChildren, LayoutUnit pageLogicalHeight = 0_lu) override;
60
61 bool avoidsFloats() const override { return true; }
62 bool canDropAnonymousBlockChild() const override { return false; }
63
64 void dirtyGrid();
65 Vector<LayoutUnit> trackSizesForComputedStyle(GridTrackSizingDirection) const;
66
67 const Vector<LayoutUnit>& columnPositions() const { return m_columnPositions; }
68 const Vector<LayoutUnit>& rowPositions() const { return m_rowPositions; }
69
70 unsigned autoRepeatCountForDirection(GridTrackSizingDirection direction) const { return m_grid.autoRepeatTracks(direction); }
71
72 // Required by GridTrackSizingAlgorithm. Keep them under control.
73 LayoutUnit guttersSize(const Grid&, GridTrackSizingDirection, unsigned startLine, unsigned span, Optional<LayoutUnit> availableSize) const;
74 LayoutUnit gridItemOffset(GridTrackSizingDirection) const;
75
76 void updateGridAreaLogicalSize(RenderBox&, LayoutSize) const;
77 bool isBaselineAlignmentForChild(const RenderBox&) const;
78 bool isBaselineAlignmentForChild(const RenderBox&, GridAxis) const;
79
80 StyleSelfAlignmentData selfAlignmentForChild(GridAxis, const RenderBox&, const RenderStyle* = nullptr) const;
81
82 StyleContentAlignmentData contentAlignment(GridTrackSizingDirection) const;
83
84protected:
85 ItemPosition selfAlignmentNormalBehavior(const RenderBox* child = nullptr) const override
86 {
87 ASSERT(child);
88 return child->isRenderReplaced() ? ItemPosition::Start : ItemPosition::Stretch;
89 }
90
91private:
92 const char* renderName() const override;
93 bool isRenderGrid() const override { return true; }
94 void computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const override;
95
96 bool selfAlignmentChangedToStretch(GridAxis, const RenderStyle& oldStyle, const RenderStyle& newStyle, const RenderBox&) const;
97 bool selfAlignmentChangedFromStretch(GridAxis, const RenderStyle& oldStyle, const RenderStyle& newStyle, const RenderBox&) const;
98
99 Optional<LayoutUnit> availableSpaceForGutters(GridTrackSizingDirection) const;
100
101 bool explicitGridDidResize(const RenderStyle&) const;
102 bool namedGridLinesDefinitionDidChange(const RenderStyle&) const;
103
104 unsigned computeAutoRepeatTracksCount(GridTrackSizingDirection, Optional<LayoutUnit> availableSize) const;
105
106 unsigned clampAutoRepeatTracks(GridTrackSizingDirection, unsigned autoRepeatTracks) const;
107
108 std::unique_ptr<OrderedTrackIndexSet> computeEmptyTracksForAutoRepeat(Grid&, GridTrackSizingDirection) const;
109
110 void performGridItemsPreLayout(const GridTrackSizingAlgorithm&) const;
111
112 void placeItemsOnGrid(GridTrackSizingAlgorithm&, Optional<LayoutUnit> availableLogicalWidth) const;
113 void populateExplicitGridAndOrderIterator(Grid&) const;
114 std::unique_ptr<GridArea> createEmptyGridAreaAtSpecifiedPositionsOutsideGrid(Grid&, const RenderBox&, GridTrackSizingDirection, const GridSpan&) const;
115 void placeSpecifiedMajorAxisItemsOnGrid(Grid&, const Vector<RenderBox*>&) const;
116 void placeAutoMajorAxisItemsOnGrid(Grid&, const Vector<RenderBox*>&) const;
117 typedef std::pair<unsigned, unsigned> AutoPlacementCursor;
118 void placeAutoMajorAxisItemOnGrid(Grid&, RenderBox&, AutoPlacementCursor&) const;
119 GridTrackSizingDirection autoPlacementMajorAxisDirection() const;
120 GridTrackSizingDirection autoPlacementMinorAxisDirection() const;
121
122 bool canPerformSimplifiedLayout() const final;
123 void prepareChildForPositionedLayout(RenderBox&);
124 bool hasStaticPositionForChild(const RenderBox&, GridTrackSizingDirection) const;
125 void layoutPositionedObject(RenderBox&, bool relayoutChildren, bool fixedPositionObjectsOnly) override;
126
127 void computeTrackSizesForDefiniteSize(GridTrackSizingDirection, LayoutUnit availableSpace);
128 void computeTrackSizesForIndefiniteSize(GridTrackSizingAlgorithm&, GridTrackSizingDirection, LayoutUnit* minIntrinsicSize = nullptr, LayoutUnit* maxIntrinsicSize = nullptr) const;
129 LayoutUnit computeTrackBasedLogicalHeight() const;
130
131 void repeatTracksSizingIfNeeded(LayoutUnit availableSpaceForColumns, LayoutUnit availableSpaceForRows);
132
133 void layoutGridItems();
134 void populateGridPositionsForDirection(GridTrackSizingDirection);
135
136 LayoutUnit resolveAutoStartGridPosition(GridTrackSizingDirection) const;
137 LayoutUnit resolveAutoEndGridPosition(GridTrackSizingDirection) const;
138 LayoutUnit gridAreaBreadthForOutOfFlowChild(const RenderBox&, GridTrackSizingDirection);
139 LayoutUnit logicalOffsetForOutOfFlowChild(const RenderBox&, GridTrackSizingDirection, LayoutUnit) const;
140 void gridAreaPositionForOutOfFlowChild(const RenderBox&, GridTrackSizingDirection, LayoutUnit& start, LayoutUnit& end) const;
141 void gridAreaPositionForInFlowChild(const RenderBox&, GridTrackSizingDirection, LayoutUnit& start, LayoutUnit& end) const;
142 void gridAreaPositionForChild(const RenderBox&, GridTrackSizingDirection, LayoutUnit& start, LayoutUnit& end) const;
143
144 GridAxisPosition columnAxisPositionForChild(const RenderBox&) const;
145 GridAxisPosition rowAxisPositionForChild(const RenderBox&) const;
146 LayoutUnit columnAxisOffsetForChild(const RenderBox&) const;
147 LayoutUnit rowAxisOffsetForChild(const RenderBox&) const;
148 void computeContentPositionAndDistributionOffset(GridTrackSizingDirection, const LayoutUnit& availableFreeSpace, unsigned numberOfGridTracks);
149 void setLogicalPositionForChild(RenderBox&) const;
150 void setLogicalOffsetForChild(RenderBox&, GridTrackSizingDirection) const;
151 LayoutUnit logicalOffsetForChild(const RenderBox&, GridTrackSizingDirection) const;
152 GridArea cachedGridArea(const RenderBox&) const;
153 GridSpan cachedGridSpan(const RenderBox&, GridTrackSizingDirection) const;
154
155 LayoutUnit gridAreaBreadthForChildIncludingAlignmentOffsets(const RenderBox&, GridTrackSizingDirection) const;
156
157 void paintChildren(PaintInfo& forSelf, const LayoutPoint& paintOffset, PaintInfo& forChild, bool usePrintRect) override;
158 LayoutUnit availableAlignmentSpaceForChildBeforeStretching(LayoutUnit gridAreaBreadthForChild, const RenderBox&) const;
159 StyleSelfAlignmentData justifySelfForChild(const RenderBox&, const RenderStyle* = nullptr) const;
160 StyleSelfAlignmentData alignSelfForChild(const RenderBox&, const RenderStyle* = nullptr) const;
161 void applyStretchAlignmentToChildIfNeeded(RenderBox&);
162 bool hasAutoSizeInColumnAxis(const RenderBox& child) const { return isHorizontalWritingMode() ? child.style().height().isAuto() : child.style().width().isAuto(); }
163 bool hasAutoSizeInRowAxis(const RenderBox& child) const { return isHorizontalWritingMode() ? child.style().width().isAuto() : child.style().height().isAuto(); }
164 bool allowedToStretchChildAlongColumnAxis(const RenderBox& child) const { return alignSelfForChild(child).position() == ItemPosition::Stretch && hasAutoSizeInColumnAxis(child) && !hasAutoMarginsInColumnAxis(child); }
165 bool allowedToStretchChildAlongRowAxis(const RenderBox& child) const { return justifySelfForChild(child).position() == ItemPosition::Stretch && hasAutoSizeInRowAxis(child) && !hasAutoMarginsInRowAxis(child); }
166 bool hasAutoMarginsInColumnAxis(const RenderBox&) const;
167 bool hasAutoMarginsInRowAxis(const RenderBox&) const;
168 void resetAutoMarginsAndLogicalTopInColumnAxis(RenderBox& child);
169 void updateAutoMarginsInColumnAxisIfNeeded(RenderBox&);
170 void updateAutoMarginsInRowAxisIfNeeded(RenderBox&);
171
172 int baselinePosition(FontBaseline, bool firstLine, LineDirectionMode, LinePositionMode = PositionOnContainingLine) const final;
173 Optional<int> firstLineBaseline() const final;
174 Optional<int> inlineBlockBaseline(LineDirectionMode) const final;
175 bool isInlineBaselineAlignedChild(const RenderBox&) const;
176
177 LayoutUnit columnAxisBaselineOffsetForChild(const RenderBox&) const;
178 LayoutUnit rowAxisBaselineOffsetForChild(const RenderBox&) const;
179
180 LayoutUnit gridGap(GridTrackSizingDirection) const;
181 LayoutUnit gridGap(GridTrackSizingDirection, Optional<LayoutUnit> availableSize) const;
182
183 unsigned nonCollapsedTracks(GridTrackSizingDirection) const;
184 unsigned numTracks(GridTrackSizingDirection, const Grid&) const;
185
186 LayoutUnit translateOutOfFlowRTLCoordinate(const RenderBox&, LayoutUnit) const;
187 LayoutUnit translateRTLCoordinate(LayoutUnit) const;
188
189 Grid m_grid;
190
191 GridTrackSizingAlgorithm m_trackSizingAlgorithm;
192
193 Vector<LayoutUnit> m_columnPositions;
194 Vector<LayoutUnit> m_rowPositions;
195 ContentAlignmentData m_offsetBetweenColumns;
196 ContentAlignmentData m_offsetBetweenRows;
197
198 typedef HashMap<const RenderBox*, Optional<size_t>> OutOfFlowPositionsMap;
199 OutOfFlowPositionsMap m_outOfFlowItemColumn;
200 OutOfFlowPositionsMap m_outOfFlowItemRow;
201
202 bool m_hasAnyOrthogonalItem {false};
203 bool m_baselineItemsCached {false};
204};
205
206} // namespace WebCore
207
208SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderGrid, isRenderGrid())
209