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 | |
33 | namespace WebCore { |
34 | |
35 | class GridArea; |
36 | class GridSpan; |
37 | |
38 | struct ContentAlignmentData { |
39 | WTF_MAKE_NONCOPYABLE(ContentAlignmentData); WTF_MAKE_FAST_ALLOCATED; |
40 | public: |
41 | ContentAlignmentData() = default; |
42 | bool isValid() const { return positionOffset >= 0 && distributionOffset >= 0; } |
43 | |
44 | LayoutUnit positionOffset; |
45 | LayoutUnit distributionOffset; |
46 | }; |
47 | |
48 | enum GridAxisPosition {GridAxisStart, GridAxisEnd, GridAxisCenter}; |
49 | |
50 | class RenderGrid final : public RenderBlock { |
51 | WTF_MAKE_ISO_ALLOCATED(RenderGrid); |
52 | public: |
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 (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 | |
84 | protected: |
85 | ItemPosition selfAlignmentNormalBehavior(const RenderBox* child = nullptr) const override |
86 | { |
87 | ASSERT(child); |
88 | return child->isRenderReplaced() ? ItemPosition::Start : ItemPosition::Stretch; |
89 | } |
90 | |
91 | private: |
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 | |
208 | SPECIALIZE_TYPE_TRAITS_RENDER_OBJECT(RenderGrid, isRenderGrid()) |
209 | |