2 * Copyright (C) 2011 Apple Inc. All rights reserved.
3 * Copyright (C) 2013, 2014 Igalia S.L.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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 COMPUTER, 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.
28 #include "RenderGrid.h"
30 #if ENABLE(CSS_GRID_LAYOUT)
32 #include "GridCoordinate.h"
33 #include "LayoutRepainter.h"
34 #include "NotImplemented.h"
35 #include "RenderLayer.h"
36 #include "RenderView.h"
40 static const int infinity = -1;
50 void growUsedBreadth(LayoutUnit growth)
53 m_usedBreadth += growth;
55 LayoutUnit usedBreadth() const { return m_usedBreadth; }
57 void growMaxBreadth(LayoutUnit growth)
59 if (m_maxBreadth == infinity)
60 m_maxBreadth = m_usedBreadth + growth;
62 m_maxBreadth += growth;
64 LayoutUnit maxBreadthIfNotInfinite() const
66 return (m_maxBreadth == infinity) ? m_usedBreadth : m_maxBreadth;
69 LayoutUnit m_usedBreadth;
70 LayoutUnit m_maxBreadth;
73 struct GridTrackForNormalization {
74 GridTrackForNormalization(const GridTrack& track, double flex)
77 , m_normalizedFlexValue(track.m_usedBreadth / flex)
81 const GridTrack* m_track;
83 LayoutUnit m_normalizedFlexValue;
86 class RenderGrid::GridIterator {
87 WTF_MAKE_NONCOPYABLE(GridIterator);
89 // |direction| is the direction that is fixed to |fixedTrackIndex| so e.g
90 // GridIterator(m_grid, ForColumns, 1) will walk over the rows of the 2nd column.
91 GridIterator(const Vector<Vector<Vector<RenderBox*, 1>>>& grid, GridTrackSizingDirection direction, size_t fixedTrackIndex)
93 , m_direction(direction)
94 , m_rowIndex((direction == ForColumns) ? 0 : fixedTrackIndex)
95 , m_columnIndex((direction == ForColumns) ? fixedTrackIndex : 0)
98 ASSERT(m_rowIndex < m_grid.size());
99 ASSERT(m_columnIndex < m_grid[0].size());
102 RenderBox* nextGridItem()
107 size_t& varyingTrackIndex = (m_direction == ForColumns) ? m_rowIndex : m_columnIndex;
108 const size_t endOfVaryingTrackIndex = (m_direction == ForColumns) ? m_grid.size() : m_grid[0].size();
109 for (; varyingTrackIndex < endOfVaryingTrackIndex; ++varyingTrackIndex) {
110 const Vector<RenderBox*>& children = m_grid[m_rowIndex][m_columnIndex];
111 if (m_childIndex < children.size())
112 return children[m_childIndex++];
119 PassOwnPtr<GridCoordinate> nextEmptyGridArea()
121 if (m_grid.isEmpty())
124 size_t& varyingTrackIndex = (m_direction == ForColumns) ? m_rowIndex : m_columnIndex;
125 const size_t endOfVaryingTrackIndex = (m_direction == ForColumns) ? m_grid.size() : m_grid[0].size();
126 for (; varyingTrackIndex < endOfVaryingTrackIndex; ++varyingTrackIndex) {
127 const Vector<RenderBox*>& children = m_grid[m_rowIndex][m_columnIndex];
128 if (children.isEmpty()) {
129 OwnPtr<GridCoordinate> result = adoptPtr(new GridCoordinate(GridSpan(m_rowIndex, m_rowIndex), GridSpan(m_columnIndex, m_columnIndex)));
130 // Advance the iterator to avoid an infinite loop where we would return the same grid area over and over.
132 return result.release();
139 const Vector<Vector<Vector<RenderBox*, 1>>>& m_grid;
140 GridTrackSizingDirection m_direction;
142 size_t m_columnIndex;
146 class RenderGrid::GridSizingData {
147 WTF_MAKE_NONCOPYABLE(GridSizingData);
149 GridSizingData(size_t gridColumnCount, size_t gridRowCount)
150 : columnTracks(gridColumnCount)
151 , rowTracks(gridRowCount)
155 Vector<GridTrack> columnTracks;
156 Vector<GridTrack> rowTracks;
157 Vector<size_t> contentSizedTracksIndex;
159 // Performance optimization: hold onto these Vectors until the end of Layout to avoid repeated malloc / free.
160 Vector<LayoutUnit> distributeTrackVector;
161 Vector<GridTrack*> filteredTracks;
164 RenderGrid::RenderGrid(Element& element, PassRef<RenderStyle> style)
165 : RenderBlock(element, std::move(style), 0)
166 , m_orderIterator(*this)
168 // All of our children must be block level.
169 setChildrenInline(false);
172 RenderGrid::~RenderGrid()
176 void RenderGrid::layoutBlock(bool relayoutChildren, LayoutUnit)
178 ASSERT(needsLayout());
180 if (!relayoutChildren && simplifiedLayout())
183 // FIXME: Much of this method is boiler plate that matches RenderBox::layoutBlock and Render*FlexibleBox::layoutBlock.
184 // It would be nice to refactor some of the duplicate code.
185 LayoutRepainter repainter(*this, checkForRepaintDuringLayout());
186 LayoutStateMaintainer statePusher(view(), *this, locationOffset(), hasTransform() || hasReflection() || style().isFlippedBlocksWritingMode());
188 prepareShapesAndPaginationBeforeBlockLayout(relayoutChildren);
190 LayoutSize previousSize = size();
193 updateLogicalWidth();
197 LayoutUnit oldClientAfterEdge = clientLogicalBottom();
198 updateLogicalHeight();
200 if (size() != previousSize)
201 relayoutChildren = true;
203 layoutPositionedObjects(relayoutChildren || isRoot());
205 updateShapesAfterBlockLayout();
207 computeOverflow(oldClientAfterEdge);
210 updateLayerTransform();
212 // Update our scroll information if we're overflow:auto/scroll/hidden now that we know if
213 // we overflow or not.
214 updateScrollInfoAfterLayout();
216 repainter.repaintAfterLayout();
221 void RenderGrid::computeIntrinsicLogicalWidths(LayoutUnit& minLogicalWidth, LayoutUnit& maxLogicalWidth) const
223 const_cast<RenderGrid*>(this)->placeItemsOnGrid();
225 GridSizingData sizingData(gridColumnCount(), gridRowCount());
226 LayoutUnit availableLogicalSpace = 0;
227 const_cast<RenderGrid*>(this)->computeUsedBreadthOfGridTracks(ForColumns, sizingData, availableLogicalSpace);
229 for (size_t i = 0; i < sizingData.columnTracks.size(); ++i) {
230 LayoutUnit minTrackBreadth = sizingData.columnTracks[i].m_usedBreadth;
231 LayoutUnit maxTrackBreadth = sizingData.columnTracks[i].m_maxBreadth;
232 maxTrackBreadth = std::max(maxTrackBreadth, minTrackBreadth);
234 minLogicalWidth += minTrackBreadth;
235 maxLogicalWidth += maxTrackBreadth;
237 // FIXME: This should add in the scrollbarWidth (e.g. see RenderFlexibleBox).
240 const_cast<RenderGrid*>(this)->clearGrid();
243 void RenderGrid::computePreferredLogicalWidths()
245 ASSERT(preferredLogicalWidthsDirty());
247 m_minPreferredLogicalWidth = 0;
248 m_maxPreferredLogicalWidth = 0;
250 // FIXME: We don't take our own logical width into account. Once we do, we need to make sure
251 // we apply (and test the interaction with) min-width / max-width.
253 computeIntrinsicLogicalWidths(m_minPreferredLogicalWidth, m_maxPreferredLogicalWidth);
255 LayoutUnit borderAndPaddingInInlineDirection = borderAndPaddingLogicalWidth();
256 m_minPreferredLogicalWidth += borderAndPaddingInInlineDirection;
257 m_maxPreferredLogicalWidth += borderAndPaddingInInlineDirection;
259 setPreferredLogicalWidthsDirty(false);
262 void RenderGrid::computeUsedBreadthOfGridTracks(GridTrackSizingDirection direction, GridSizingData& sizingData)
264 LayoutUnit availableLogicalSpace = (direction == ForColumns) ? availableLogicalWidth() : availableLogicalHeight(IncludeMarginBorderPadding);
265 computeUsedBreadthOfGridTracks(direction, sizingData, availableLogicalSpace);
268 bool RenderGrid::gridElementIsShrinkToFit()
270 return isFloatingOrOutOfFlowPositioned();
273 void RenderGrid::computeUsedBreadthOfGridTracks(GridTrackSizingDirection direction, GridSizingData& sizingData, LayoutUnit& availableLogicalSpace)
275 Vector<GridTrack>& tracks = (direction == ForColumns) ? sizingData.columnTracks : sizingData.rowTracks;
276 Vector<size_t> flexibleSizedTracksIndex;
277 sizingData.contentSizedTracksIndex.shrink(0);
279 // 1. Initialize per Grid track variables.
280 for (size_t i = 0; i < tracks.size(); ++i) {
281 GridTrack& track = tracks[i];
282 const GridTrackSize& trackSize = gridTrackSize(direction, i);
283 const GridLength& minTrackBreadth = trackSize.minTrackBreadth();
284 const GridLength& maxTrackBreadth = trackSize.maxTrackBreadth();
286 track.m_usedBreadth = computeUsedBreadthOfMinLength(direction, minTrackBreadth);
287 track.m_maxBreadth = computeUsedBreadthOfMaxLength(direction, maxTrackBreadth, track.m_usedBreadth);
289 track.m_maxBreadth = std::max(track.m_maxBreadth, track.m_usedBreadth);
291 if (trackSize.isContentSized())
292 sizingData.contentSizedTracksIndex.append(i);
293 if (trackSize.maxTrackBreadth().isFlex())
294 flexibleSizedTracksIndex.append(i);
297 // 2. Resolve content-based TrackSizingFunctions.
298 if (!sizingData.contentSizedTracksIndex.isEmpty())
299 resolveContentBasedTrackSizingFunctions(direction, sizingData);
301 for (size_t i = 0; i < tracks.size(); ++i) {
302 ASSERT(tracks[i].m_maxBreadth != infinity);
303 availableLogicalSpace -= tracks[i].m_usedBreadth;
306 const bool hasUndefinedRemainingSpace = (direction == ForRows) ? style().logicalHeight().isAuto() : gridElementIsShrinkToFit();
308 if (!hasUndefinedRemainingSpace && availableLogicalSpace <= 0)
311 // 3. Grow all Grid tracks in GridTracks from their UsedBreadth up to their MaxBreadth value until
312 // availableLogicalSpace (RemainingSpace in the specs) is exhausted.
313 const size_t tracksSize = tracks.size();
314 if (!hasUndefinedRemainingSpace) {
315 Vector<GridTrack*> tracksForDistribution(tracksSize);
316 for (size_t i = 0; i < tracksSize; ++i)
317 tracksForDistribution[i] = tracks.data() + i;
319 distributeSpaceToTracks(tracksForDistribution, 0, &GridTrack::usedBreadth, &GridTrack::growUsedBreadth, sizingData, availableLogicalSpace);
321 for (size_t i = 0; i < tracksSize; ++i)
322 tracks[i].m_usedBreadth = tracks[i].m_maxBreadth;
325 if (flexibleSizedTracksIndex.isEmpty())
328 // 4. Grow all Grid tracks having a fraction as the MaxTrackSizingFunction.
329 double normalizedFractionBreadth = 0;
330 if (!hasUndefinedRemainingSpace)
331 normalizedFractionBreadth = computeNormalizedFractionBreadth(tracks, GridSpan(0, tracks.size() - 1), direction, availableLogicalSpace);
333 for (size_t i = 0; i < flexibleSizedTracksIndex.size(); ++i) {
334 const size_t trackIndex = flexibleSizedTracksIndex[i];
335 const GridTrackSize& trackSize = gridTrackSize(direction, trackIndex);
336 normalizedFractionBreadth = std::max(normalizedFractionBreadth, tracks[trackIndex].m_usedBreadth / trackSize.maxTrackBreadth().flex());
339 for (size_t i = 0; i < flexibleSizedTracksIndex.size(); ++i) {
340 GridIterator iterator(m_grid, direction, flexibleSizedTracksIndex[i]);
341 while (RenderBox* gridItem = iterator.nextGridItem()) {
342 const GridCoordinate coordinate = cachedGridCoordinate(gridItem);
343 const GridSpan span = (direction == ForColumns) ? coordinate.columns : coordinate.rows;
345 // Do not include already processed items.
346 if (i > 0 && span.initialPositionIndex <= flexibleSizedTracksIndex[i - 1])
349 double itemNormalizedFlexBreadth = computeNormalizedFractionBreadth(tracks, span, direction, maxContentForChild(gridItem, direction, sizingData.columnTracks));
350 normalizedFractionBreadth = std::max(normalizedFractionBreadth, itemNormalizedFlexBreadth);
355 for (size_t i = 0; i < flexibleSizedTracksIndex.size(); ++i) {
356 const size_t trackIndex = flexibleSizedTracksIndex[i];
357 const GridTrackSize& trackSize = gridTrackSize(direction, trackIndex);
359 tracks[trackIndex].m_usedBreadth = std::max<LayoutUnit>(tracks[trackIndex].m_usedBreadth, normalizedFractionBreadth * trackSize.maxTrackBreadth().flex());
363 LayoutUnit RenderGrid::computeUsedBreadthOfMinLength(GridTrackSizingDirection direction, const GridLength& gridLength) const
365 if (gridLength.isFlex())
368 const Length& trackLength = gridLength.length();
369 ASSERT(!trackLength.isAuto());
370 if (trackLength.isSpecified())
371 return computeUsedBreadthOfSpecifiedLength(direction, trackLength);
373 ASSERT(trackLength.isMinContent() || trackLength.isMaxContent());
377 LayoutUnit RenderGrid::computeUsedBreadthOfMaxLength(GridTrackSizingDirection direction, const GridLength& gridLength, LayoutUnit usedBreadth) const
379 if (gridLength.isFlex())
382 const Length& trackLength = gridLength.length();
383 ASSERT(!trackLength.isAuto());
384 if (trackLength.isSpecified()) {
385 LayoutUnit computedBreadth = computeUsedBreadthOfSpecifiedLength(direction, trackLength);
386 ASSERT(computedBreadth != infinity);
387 return computedBreadth;
390 ASSERT(trackLength.isMinContent() || trackLength.isMaxContent());
394 LayoutUnit RenderGrid::computeUsedBreadthOfSpecifiedLength(GridTrackSizingDirection direction, const Length& trackLength) const
396 ASSERT(trackLength.isSpecified());
397 return valueForLength(trackLength, direction == ForColumns ? logicalWidth() : computeContentLogicalHeight(style().logicalHeight()));
400 double RenderGrid::computeNormalizedFractionBreadth(Vector<GridTrack>& tracks, const GridSpan& tracksSpan, GridTrackSizingDirection direction, LayoutUnit availableLogicalSpace) const
402 // |availableLogicalSpace| already accounts for the used breadths so no need to remove it here.
404 Vector<GridTrackForNormalization> tracksForNormalization;
405 for (size_t i = tracksSpan.initialPositionIndex; i <= tracksSpan.finalPositionIndex; ++i) {
406 const GridTrackSize& trackSize = gridTrackSize(direction, i);
407 if (!trackSize.maxTrackBreadth().isFlex())
410 tracksForNormalization.append(GridTrackForNormalization(tracks[i], trackSize.maxTrackBreadth().flex()));
413 // The function is not called if we don't have <flex> grid tracks
414 ASSERT(!tracksForNormalization.isEmpty());
416 std::sort(tracksForNormalization.begin(), tracksForNormalization.end(),
417 [](const GridTrackForNormalization& track1, const GridTrackForNormalization& track2) {
418 return track1.m_normalizedFlexValue < track2.m_normalizedFlexValue;
421 // These values work together: as we walk over our grid tracks, we increase fractionValueBasedOnGridItemsRatio
422 // to match a grid track's usedBreadth to <flex> ratio until the total fractions sized grid tracks wouldn't
423 // fit into availableLogicalSpaceIgnoringFractionTracks.
424 double accumulatedFractions = 0;
425 LayoutUnit fractionValueBasedOnGridItemsRatio = 0;
426 LayoutUnit availableLogicalSpaceIgnoringFractionTracks = availableLogicalSpace;
428 for (size_t i = 0; i < tracksForNormalization.size(); ++i) {
429 const GridTrackForNormalization& track = tracksForNormalization[i];
430 if (track.m_normalizedFlexValue > fractionValueBasedOnGridItemsRatio) {
431 // If the normalized flex value (we ordered |tracksForNormalization| by increasing normalized flex value)
432 // will make us overflow our container, then stop. We have the previous step's ratio is the best fit.
433 if (track.m_normalizedFlexValue * accumulatedFractions > availableLogicalSpaceIgnoringFractionTracks)
436 fractionValueBasedOnGridItemsRatio = track.m_normalizedFlexValue;
439 accumulatedFractions += track.m_flex;
440 // This item was processed so we re-add its used breadth to the available space to accurately count the remaining space.
441 availableLogicalSpaceIgnoringFractionTracks += track.m_track->m_usedBreadth;
444 return availableLogicalSpaceIgnoringFractionTracks / accumulatedFractions;
447 const GridTrackSize& RenderGrid::gridTrackSize(GridTrackSizingDirection direction, size_t i) const
449 const Vector<GridTrackSize>& trackStyles = (direction == ForColumns) ? style().gridColumns() : style().gridRows();
450 if (i >= trackStyles.size())
451 return (direction == ForColumns) ? style().gridAutoColumns() : style().gridAutoRows();
453 return trackStyles[i];
456 size_t RenderGrid::explicitGridColumnCount() const
458 return style().gridColumns().size();
461 size_t RenderGrid::explicitGridRowCount() const
463 return style().gridRows().size();
466 size_t RenderGrid::explicitGridSizeForSide(GridPositionSide side) const
468 return (side == ColumnStartSide || side == ColumnEndSide) ? explicitGridColumnCount() : explicitGridRowCount();
471 LayoutUnit RenderGrid::logicalContentHeightForChild(RenderBox* child, Vector<GridTrack>& columnTracks)
473 LayoutUnit oldOverrideContainingBlockContentLogicalWidth = child->hasOverrideContainingBlockLogicalWidth() ? child->overrideContainingBlockContentLogicalWidth() : LayoutUnit();
474 LayoutUnit overrideContainingBlockContentLogicalWidth = gridAreaBreadthForChild(child, ForColumns, columnTracks);
475 if (child->style().logicalHeight().isPercent() || oldOverrideContainingBlockContentLogicalWidth != overrideContainingBlockContentLogicalWidth)
476 child->setNeedsLayout(MarkOnlyThis);
478 child->setOverrideContainingBlockContentLogicalWidth(overrideContainingBlockContentLogicalWidth);
479 // If |child| has a percentage logical height, we shouldn't let it override its intrinsic height, which is
480 // what we are interested in here. Thus we need to set the override logical height to -1 (no possible resolution).
481 child->setOverrideContainingBlockContentLogicalHeight(-1);
482 child->layoutIfNeeded();
483 return child->logicalHeight();
486 LayoutUnit RenderGrid::minContentForChild(RenderBox* child, GridTrackSizingDirection direction, Vector<GridTrack>& columnTracks)
488 bool hasOrthogonalWritingMode = child->isHorizontalWritingMode() != isHorizontalWritingMode();
489 // FIXME: Properly support orthogonal writing mode.
490 if (hasOrthogonalWritingMode)
493 if (direction == ForColumns) {
494 // FIXME: It's unclear if we should return the intrinsic width or the preferred width.
495 // See http://lists.w3.org/Archives/Public/www-style/2013Jan/0245.html
496 return child->minPreferredLogicalWidth() + marginIntrinsicLogicalWidthForChild(*child);
499 return logicalContentHeightForChild(child, columnTracks);
502 LayoutUnit RenderGrid::maxContentForChild(RenderBox* child, GridTrackSizingDirection direction, Vector<GridTrack>& columnTracks)
504 bool hasOrthogonalWritingMode = child->isHorizontalWritingMode() != isHorizontalWritingMode();
505 // FIXME: Properly support orthogonal writing mode.
506 if (hasOrthogonalWritingMode)
509 if (direction == ForColumns) {
510 // FIXME: It's unclear if we should return the intrinsic width or the preferred width.
511 // See http://lists.w3.org/Archives/Public/www-style/2013Jan/0245.html
512 return child->maxPreferredLogicalWidth() + marginIntrinsicLogicalWidthForChild(*child);
515 return logicalContentHeightForChild(child, columnTracks);
518 void RenderGrid::resolveContentBasedTrackSizingFunctions(GridTrackSizingDirection direction, GridSizingData& sizingData)
520 // FIXME: Split the grid tracks into groups that doesn't overlap a <flex> grid track.
522 for (size_t i = 0; i < sizingData.contentSizedTracksIndex.size(); ++i) {
523 GridIterator iterator(m_grid, direction, sizingData.contentSizedTracksIndex[i]);
524 while (RenderBox* gridItem = iterator.nextGridItem()) {
525 resolveContentBasedTrackSizingFunctionsForItems(direction, sizingData, gridItem, &GridTrackSize::hasMinOrMaxContentMinTrackBreadth, &RenderGrid::minContentForChild, &GridTrack::usedBreadth, &GridTrack::growUsedBreadth);
526 resolveContentBasedTrackSizingFunctionsForItems(direction, sizingData, gridItem, &GridTrackSize::hasMaxContentMinTrackBreadth, &RenderGrid::maxContentForChild, &GridTrack::usedBreadth, &GridTrack::growUsedBreadth);
527 resolveContentBasedTrackSizingFunctionsForItems(direction, sizingData, gridItem, &GridTrackSize::hasMinOrMaxContentMaxTrackBreadth, &RenderGrid::minContentForChild, &GridTrack::maxBreadthIfNotInfinite, &GridTrack::growMaxBreadth);
528 resolveContentBasedTrackSizingFunctionsForItems(direction, sizingData, gridItem, &GridTrackSize::hasMaxContentMaxTrackBreadth, &RenderGrid::maxContentForChild, &GridTrack::maxBreadthIfNotInfinite, &GridTrack::growMaxBreadth);
531 GridTrack& track = (direction == ForColumns) ? sizingData.columnTracks[i] : sizingData.rowTracks[i];
532 if (track.m_maxBreadth == infinity)
533 track.m_maxBreadth = track.m_usedBreadth;
537 void RenderGrid::resolveContentBasedTrackSizingFunctionsForItems(GridTrackSizingDirection direction, GridSizingData& sizingData, RenderBox* gridItem, FilterFunction filterFunction, SizingFunction sizingFunction, AccumulatorGetter trackGetter, AccumulatorGrowFunction trackGrowthFunction)
539 const GridCoordinate coordinate = cachedGridCoordinate(gridItem);
540 const size_t initialTrackIndex = (direction == ForColumns) ? coordinate.columns.initialPositionIndex : coordinate.rows.initialPositionIndex;
541 const size_t finalTrackIndex = (direction == ForColumns) ? coordinate.columns.finalPositionIndex : coordinate.rows.finalPositionIndex;
543 sizingData.filteredTracks.shrink(0);
544 for (size_t trackIndex = initialTrackIndex; trackIndex <= finalTrackIndex; ++trackIndex) {
545 const GridTrackSize& trackSize = gridTrackSize(direction, trackIndex);
546 if (!(trackSize.*filterFunction)())
549 GridTrack& track = (direction == ForColumns) ? sizingData.columnTracks[trackIndex] : sizingData.rowTracks[trackIndex];
550 sizingData.filteredTracks.append(&track);
553 if (sizingData.filteredTracks.isEmpty())
556 LayoutUnit additionalBreadthSpace = (this->*sizingFunction)(gridItem, direction, sizingData.columnTracks);
557 for (size_t trackIndexForSpace = initialTrackIndex; trackIndexForSpace <= finalTrackIndex; ++trackIndexForSpace) {
558 GridTrack& track = (direction == ForColumns) ? sizingData.columnTracks[trackIndexForSpace] : sizingData.rowTracks[trackIndexForSpace];
559 additionalBreadthSpace -= (track.*trackGetter)();
562 // FIXME: We should pass different values for |tracksForGrowthAboveMaxBreadth|.
563 distributeSpaceToTracks(sizingData.filteredTracks, &sizingData.filteredTracks, trackGetter, trackGrowthFunction, sizingData, additionalBreadthSpace);
566 static bool sortByGridTrackGrowthPotential(const GridTrack* track1, const GridTrack* track2)
568 return (track1->m_maxBreadth - track1->m_usedBreadth) < (track2->m_maxBreadth - track2->m_usedBreadth);
571 void RenderGrid::distributeSpaceToTracks(Vector<GridTrack*>& tracks, Vector<GridTrack*>* tracksForGrowthAboveMaxBreadth, AccumulatorGetter trackGetter, AccumulatorGrowFunction trackGrowthFunction, GridSizingData& sizingData, LayoutUnit& availableLogicalSpace)
573 std::sort(tracks.begin(), tracks.end(), sortByGridTrackGrowthPotential);
575 size_t tracksSize = tracks.size();
576 sizingData.distributeTrackVector.resize(tracksSize);
578 for (size_t i = 0; i < tracksSize; ++i) {
579 GridTrack& track = *tracks[i];
580 LayoutUnit availableLogicalSpaceShare = availableLogicalSpace / (tracksSize - i);
581 LayoutUnit trackBreadth = (tracks[i]->*trackGetter)();
582 LayoutUnit growthShare = std::max(LayoutUnit(), std::min(availableLogicalSpaceShare, track.m_maxBreadth - trackBreadth));
583 // We should never shrink any grid track or else we can't guarantee we abide by our min-sizing function.
584 sizingData.distributeTrackVector[i] = trackBreadth + growthShare;
585 availableLogicalSpace -= growthShare;
588 if (availableLogicalSpace > 0 && tracksForGrowthAboveMaxBreadth) {
589 tracksSize = tracksForGrowthAboveMaxBreadth->size();
590 for (size_t i = 0; i < tracksSize; ++i) {
591 LayoutUnit growthShare = availableLogicalSpace / (tracksSize - i);
592 sizingData.distributeTrackVector[i] += growthShare;
593 availableLogicalSpace -= growthShare;
597 for (size_t i = 0; i < tracksSize; ++i) {
598 LayoutUnit growth = sizingData.distributeTrackVector[i] - (tracks[i]->*trackGetter)();
600 (tracks[i]->*trackGrowthFunction)(growth);
605 bool RenderGrid::tracksAreWiderThanMinTrackBreadth(GridTrackSizingDirection direction, const Vector<GridTrack>& tracks)
607 for (size_t i = 0; i < tracks.size(); ++i) {
608 const GridTrackSize& trackSize = gridTrackSize(direction, i);
609 const GridLength& minTrackBreadth = trackSize.minTrackBreadth();
610 if (computeUsedBreadthOfMinLength(direction, minTrackBreadth) > tracks[i].m_usedBreadth)
617 void RenderGrid::growGrid(GridTrackSizingDirection direction)
619 if (direction == ForColumns) {
620 const size_t oldColumnSize = m_grid[0].size();
621 for (size_t row = 0; row < m_grid.size(); ++row)
622 m_grid[row].grow(oldColumnSize + 1);
624 const size_t oldRowSize = m_grid.size();
625 m_grid.grow(oldRowSize + 1);
626 m_grid[oldRowSize].grow(m_grid[0].size());
630 void RenderGrid::insertItemIntoGrid(RenderBox* child, const GridCoordinate& coordinate)
632 for (size_t row = coordinate.rows.initialPositionIndex; row <= coordinate.rows.finalPositionIndex; ++row) {
633 for (size_t column = coordinate.columns.initialPositionIndex; column <= coordinate.columns.finalPositionIndex; ++column)
634 m_grid[row][column].append(child);
636 m_gridItemCoordinate.set(child, coordinate);
639 void RenderGrid::insertItemIntoGrid(RenderBox* child, size_t rowTrack, size_t columnTrack)
641 const GridSpan& rowSpan = resolveGridPositionsFromAutoPlacementPosition(child, ForRows, rowTrack);
642 const GridSpan& columnSpan = resolveGridPositionsFromAutoPlacementPosition(child, ForColumns, columnTrack);
643 insertItemIntoGrid(child, GridCoordinate(rowSpan, columnSpan));
646 void RenderGrid::placeItemsOnGrid()
648 ASSERT(!gridWasPopulated());
649 ASSERT(m_gridItemCoordinate.isEmpty());
651 populateExplicitGridAndOrderIterator();
653 Vector<RenderBox*> autoMajorAxisAutoGridItems;
654 Vector<RenderBox*> specifiedMajorAxisAutoGridItems;
655 GridAutoFlow autoFlow = style().gridAutoFlow();
656 for (RenderBox* child = m_orderIterator.first(); child; child = m_orderIterator.next()) {
657 // FIXME: We never re-resolve positions if the grid is grown during auto-placement which may lead auto / <integer>
658 // positions to not match the author's intent. The specification is unclear on what should be done in this case.
659 OwnPtr<GridSpan> rowPositions = resolveGridPositionsFromStyle(child, ForRows);
660 OwnPtr<GridSpan> columnPositions = resolveGridPositionsFromStyle(child, ForColumns);
661 if (!rowPositions || !columnPositions) {
662 GridSpan* majorAxisPositions = (autoPlacementMajorAxisDirection() == ForColumns) ? columnPositions.get() : rowPositions.get();
663 if (!majorAxisPositions)
664 autoMajorAxisAutoGridItems.append(child);
666 specifiedMajorAxisAutoGridItems.append(child);
669 insertItemIntoGrid(child, GridCoordinate(*rowPositions, *columnPositions));
672 ASSERT(gridRowCount() >= style().gridRows().size());
673 ASSERT(gridColumnCount() >= style().gridColumns().size());
675 if (autoFlow == AutoFlowNone) {
676 // If we did collect some grid items, they won't be placed thus never laid out.
677 ASSERT(!autoMajorAxisAutoGridItems.size());
678 ASSERT(!specifiedMajorAxisAutoGridItems.size());
682 placeSpecifiedMajorAxisItemsOnGrid(specifiedMajorAxisAutoGridItems);
683 placeAutoMajorAxisItemsOnGrid(autoMajorAxisAutoGridItems);
686 void RenderGrid::populateExplicitGridAndOrderIterator()
688 // FIXME: We should find a way to share OrderValues's initialization code with RenderFlexibleBox.
689 OrderIterator::OrderValues orderValues;
690 size_t maximumRowIndex = std::max<size_t>(1, explicitGridRowCount());
691 size_t maximumColumnIndex = std::max<size_t>(1, explicitGridColumnCount());
693 for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) {
694 // Avoid growing the vector for the common-case default value of 0. This optimizes the most common case which is
695 // one or a few values with the default order 0
696 int order = child->style().order();
697 if (orderValues.isEmpty() || orderValues.last() != order)
698 orderValues.append(order);
700 // This function bypasses the cache (cachedGridCoordinate()) as it is used to build it.
701 OwnPtr<GridSpan> rowPositions = resolveGridPositionsFromStyle(child, ForRows);
702 OwnPtr<GridSpan> columnPositions = resolveGridPositionsFromStyle(child, ForColumns);
704 // |positions| is 0 if we need to run the auto-placement algorithm. Our estimation ignores
705 // this case as the auto-placement algorithm will grow the grid as needed.
707 maximumRowIndex = std::max(maximumRowIndex, rowPositions->finalPositionIndex + 1);
709 maximumColumnIndex = std::max(maximumColumnIndex, columnPositions->finalPositionIndex + 1);
712 m_grid.grow(maximumRowIndex);
713 for (size_t i = 0; i < m_grid.size(); ++i)
714 m_grid[i].grow(maximumColumnIndex);
716 m_orderIterator.setOrderValues(std::move(orderValues));
719 void RenderGrid::placeSpecifiedMajorAxisItemsOnGrid(Vector<RenderBox*> autoGridItems)
721 for (size_t i = 0; i < autoGridItems.size(); ++i) {
722 OwnPtr<GridSpan> majorAxisPositions = resolveGridPositionsFromStyle(autoGridItems[i], autoPlacementMajorAxisDirection());
723 GridIterator iterator(m_grid, autoPlacementMajorAxisDirection(), majorAxisPositions->initialPositionIndex);
724 if (OwnPtr<GridCoordinate> emptyGridArea = iterator.nextEmptyGridArea()) {
725 insertItemIntoGrid(autoGridItems[i], emptyGridArea->rows.initialPositionIndex, emptyGridArea->columns.initialPositionIndex);
729 growGrid(autoPlacementMinorAxisDirection());
730 OwnPtr<GridCoordinate> emptyGridArea = iterator.nextEmptyGridArea();
731 ASSERT(emptyGridArea);
732 insertItemIntoGrid(autoGridItems[i], emptyGridArea->rows.initialPositionIndex, emptyGridArea->columns.initialPositionIndex);
736 void RenderGrid::placeAutoMajorAxisItemsOnGrid(Vector<RenderBox*> autoGridItems)
738 for (size_t i = 0; i < autoGridItems.size(); ++i)
739 placeAutoMajorAxisItemOnGrid(autoGridItems[i]);
742 void RenderGrid::placeAutoMajorAxisItemOnGrid(RenderBox* gridItem)
744 OwnPtr<GridSpan> minorAxisPositions = resolveGridPositionsFromStyle(gridItem, autoPlacementMinorAxisDirection());
745 ASSERT(!resolveGridPositionsFromStyle(gridItem, autoPlacementMajorAxisDirection()));
746 size_t minorAxisIndex = 0;
747 if (minorAxisPositions) {
748 minorAxisIndex = minorAxisPositions->initialPositionIndex;
749 GridIterator iterator(m_grid, autoPlacementMinorAxisDirection(), minorAxisIndex);
750 if (OwnPtr<GridCoordinate> emptyGridArea = iterator.nextEmptyGridArea()) {
751 insertItemIntoGrid(gridItem, emptyGridArea->rows.initialPositionIndex, emptyGridArea->columns.initialPositionIndex);
755 const size_t endOfMajorAxis = (autoPlacementMajorAxisDirection() == ForColumns) ? gridColumnCount() : gridRowCount();
756 for (size_t majorAxisIndex = 0; majorAxisIndex < endOfMajorAxis; ++majorAxisIndex) {
757 GridIterator iterator(m_grid, autoPlacementMajorAxisDirection(), majorAxisIndex);
758 if (OwnPtr<GridCoordinate> emptyGridArea = iterator.nextEmptyGridArea()) {
759 insertItemIntoGrid(gridItem, emptyGridArea->rows.initialPositionIndex, emptyGridArea->columns.initialPositionIndex);
765 // We didn't find an empty grid area so we need to create an extra major axis line and insert our gridItem in it.
766 const size_t columnIndex = (autoPlacementMajorAxisDirection() == ForColumns) ? m_grid[0].size() : minorAxisIndex;
767 const size_t rowIndex = (autoPlacementMajorAxisDirection() == ForColumns) ? minorAxisIndex : m_grid.size();
768 growGrid(autoPlacementMajorAxisDirection());
769 insertItemIntoGrid(gridItem, rowIndex, columnIndex);
772 RenderGrid::GridTrackSizingDirection RenderGrid::autoPlacementMajorAxisDirection() const
774 GridAutoFlow flow = style().gridAutoFlow();
775 ASSERT(flow != AutoFlowNone);
776 return (flow == AutoFlowColumn) ? ForColumns : ForRows;
779 RenderGrid::GridTrackSizingDirection RenderGrid::autoPlacementMinorAxisDirection() const
781 GridAutoFlow flow = style().gridAutoFlow();
782 ASSERT(flow != AutoFlowNone);
783 return (flow == AutoFlowColumn) ? ForRows : ForColumns;
786 void RenderGrid::clearGrid()
789 m_gridItemCoordinate.clear();
792 void RenderGrid::layoutGridItems()
796 GridSizingData sizingData(gridColumnCount(), gridRowCount());
797 computeUsedBreadthOfGridTracks(ForColumns, sizingData);
798 ASSERT(tracksAreWiderThanMinTrackBreadth(ForColumns, sizingData.columnTracks));
799 computeUsedBreadthOfGridTracks(ForRows, sizingData);
800 ASSERT(tracksAreWiderThanMinTrackBreadth(ForRows, sizingData.rowTracks));
802 populateGridPositions(sizingData);
804 for (RenderBox* child = firstChildBox(); child; child = child->nextSiblingBox()) {
805 // Because the grid area cannot be styled, we don't need to adjust
806 // the grid breadth to account for 'box-sizing'.
807 LayoutUnit oldOverrideContainingBlockContentLogicalWidth = child->hasOverrideContainingBlockLogicalWidth() ? child->overrideContainingBlockContentLogicalWidth() : LayoutUnit();
808 LayoutUnit oldOverrideContainingBlockContentLogicalHeight = child->hasOverrideContainingBlockLogicalHeight() ? child->overrideContainingBlockContentLogicalHeight() : LayoutUnit();
810 LayoutUnit overrideContainingBlockContentLogicalWidth = gridAreaBreadthForChild(child, ForColumns, sizingData.columnTracks);
811 LayoutUnit overrideContainingBlockContentLogicalHeight = gridAreaBreadthForChild(child, ForRows, sizingData.rowTracks);
812 if (oldOverrideContainingBlockContentLogicalWidth != overrideContainingBlockContentLogicalWidth || (oldOverrideContainingBlockContentLogicalHeight != overrideContainingBlockContentLogicalHeight && (child->hasRelativeLogicalHeight() || child->hasViewportPercentageLogicalHeight())))
813 child->setNeedsLayout(MarkOnlyThis);
815 child->setOverrideContainingBlockContentLogicalWidth(overrideContainingBlockContentLogicalWidth);
816 child->setOverrideContainingBlockContentLogicalHeight(overrideContainingBlockContentLogicalHeight);
818 LayoutRect oldChildRect = child->frameRect();
820 // FIXME: Grid items should stretch to fill their cells. Once we
821 // implement grid-{column,row}-align, we can also shrink to fit. For
822 // now, just size as if we were a regular child.
823 child->layoutIfNeeded();
825 child->setLogicalLocation(findChildLogicalPosition(child, sizingData));
827 // If the child moved, we have to repaint it as well as any floating/positioned
828 // descendants. An exception is if we need a layout. In this case, we know we're going to
829 // repaint ourselves (and the child) anyway.
830 if (!selfNeedsLayout() && child->checkForRepaintDuringLayout())
831 child->repaintDuringLayoutIfMoved(oldChildRect);
834 for (size_t i = 0; i < sizingData.rowTracks.size(); ++i)
835 setLogicalHeight(logicalHeight() + sizingData.rowTracks[i].m_usedBreadth);
837 // FIXME: We should handle min / max logical height.
839 setLogicalHeight(logicalHeight() + borderAndPaddingLogicalHeight());
843 GridCoordinate RenderGrid::cachedGridCoordinate(const RenderBox* gridItem) const
845 ASSERT(m_gridItemCoordinate.contains(gridItem));
846 return m_gridItemCoordinate.get(gridItem);
849 GridSpan RenderGrid::resolveGridPositionsFromAutoPlacementPosition(const RenderBox*, GridTrackSizingDirection, size_t initialPosition) const
851 // FIXME: We don't support spanning with auto positions yet. Once we do, this is wrong. Also we should make
852 // sure the grid can accomodate the new item as we only grow 1 position in a given direction.
853 return GridSpan(initialPosition, initialPosition);
856 PassOwnPtr<GridSpan> RenderGrid::resolveGridPositionsFromStyle(const RenderBox* gridItem, GridTrackSizingDirection direction) const
858 const GridPosition& initialPosition = (direction == ForColumns) ? gridItem->style().gridItemColumnStart() : gridItem->style().gridItemRowStart();
859 const GridPositionSide initialPositionSide = (direction == ForColumns) ? ColumnStartSide : RowStartSide;
860 const GridPosition& finalPosition = (direction == ForColumns) ? gridItem->style().gridItemColumnEnd() : gridItem->style().gridItemRowEnd();
861 const GridPositionSide finalPositionSide = (direction == ForColumns) ? ColumnEndSide : RowEndSide;
863 // We should NEVER see both spans as they should have been handled during style resolve.
864 ASSERT(!initialPosition.isSpan() || !finalPosition.isSpan());
866 if (initialPosition.shouldBeResolvedAgainstOppositePosition() && finalPosition.shouldBeResolvedAgainstOppositePosition()) {
867 if (style().gridAutoFlow() == AutoFlowNone)
868 return adoptPtr(new GridSpan(0, 0));
870 // We can't get our grid positions without running the auto placement algorithm.
874 if (initialPosition.shouldBeResolvedAgainstOppositePosition()) {
875 // Infer the position from the final position ('auto / 1' or 'span 2 / 3' case).
876 const size_t finalResolvedPosition = resolveGridPositionFromStyle(finalPosition, finalPositionSide);
877 return resolveGridPositionAgainstOppositePosition(finalResolvedPosition, initialPosition, initialPositionSide);
880 if (finalPosition.shouldBeResolvedAgainstOppositePosition()) {
881 // Infer our position from the initial position ('1 / auto' or '3 / span 2' case).
882 const size_t initialResolvedPosition = resolveGridPositionFromStyle(initialPosition, initialPositionSide);
883 return resolveGridPositionAgainstOppositePosition(initialResolvedPosition, finalPosition, finalPositionSide);
886 size_t resolvedInitialPosition = resolveGridPositionFromStyle(initialPosition, initialPositionSide);
887 size_t resolvedFinalPosition = resolveGridPositionFromStyle(finalPosition, finalPositionSide);
889 // If 'grid-row-end' specifies a line at or before that specified by 'grid-row-start', it computes to 'span 1'.
890 if (resolvedFinalPosition < resolvedInitialPosition)
891 resolvedFinalPosition = resolvedInitialPosition;
893 return adoptPtr(new GridSpan(resolvedInitialPosition, resolvedFinalPosition));
896 size_t RenderGrid::resolveNamedGridLinePositionFromStyle(const GridPosition& position, GridPositionSide side) const
898 ASSERT(!position.namedGridLine().isNull());
900 const NamedGridLinesMap& gridLinesNames = (side == ColumnStartSide || side == ColumnEndSide) ? style().namedGridColumnLines() : style().namedGridRowLines();
901 NamedGridLinesMap::const_iterator it = gridLinesNames.find(position.namedGridLine());
902 if (it == gridLinesNames.end()) {
903 if (position.isPositive())
905 const size_t lastLine = explicitGridSizeForSide(side);
906 return GridPosition::adjustGridPositionForSide(lastLine, side);
909 size_t namedGridLineIndex;
910 if (position.isPositive())
911 namedGridLineIndex = std::min<size_t>(position.integerPosition(), it->value.size()) - 1;
913 namedGridLineIndex = std::max<int>(it->value.size() - abs(position.integerPosition()), 0);
914 return GridPosition::adjustGridPositionForSide(it->value[namedGridLineIndex], side);
917 size_t RenderGrid::resolveGridPositionFromStyle(const GridPosition& position, GridPositionSide side) const
919 switch (position.type()) {
920 case ExplicitPosition: {
921 ASSERT(position.integerPosition());
923 if (!position.namedGridLine().isNull())
924 return resolveNamedGridLinePositionFromStyle(position, side);
926 // Handle <integer> explicit position.
927 if (position.isPositive())
928 return GridPosition::adjustGridPositionForSide(position.integerPosition() - 1, side);
930 size_t resolvedPosition = abs(position.integerPosition()) - 1;
931 const size_t endOfTrack = explicitGridSizeForSide(side);
933 // Per http://lists.w3.org/Archives/Public/www-style/2013Mar/0589.html, we clamp negative value to the first line.
934 if (endOfTrack < resolvedPosition)
937 return GridPosition::adjustGridPositionForSide(endOfTrack - resolvedPosition, side);
939 case NamedGridAreaPosition:
941 NamedGridAreaMap::const_iterator it = style().namedGridArea().find(position.namedGridLine());
942 // Unknown grid area should have been computed to 'auto' by now.
943 ASSERT(it != style().namedGridArea().end());
944 const GridCoordinate& gridAreaCoordinate = it->value;
946 case ColumnStartSide:
947 return gridAreaCoordinate.columns.initialPositionIndex;
949 return gridAreaCoordinate.columns.finalPositionIndex;
951 return gridAreaCoordinate.rows.initialPositionIndex;
953 return gridAreaCoordinate.rows.finalPositionIndex;
955 ASSERT_NOT_REACHED();
960 // 'auto' and span depend on the opposite position for resolution (e.g. grid-row: auto / 1 or grid-column: span 3 / "myHeader").
961 ASSERT_NOT_REACHED();
964 ASSERT_NOT_REACHED();
968 PassOwnPtr<GridSpan> RenderGrid::resolveGridPositionAgainstOppositePosition(size_t resolvedOppositePosition, const GridPosition& position, GridPositionSide side) const
970 if (position.isAuto())
971 return GridSpan::create(resolvedOppositePosition, resolvedOppositePosition);
973 ASSERT(position.isSpan());
974 ASSERT(position.spanPosition() > 0);
976 if (!position.namedGridLine().isNull()) {
977 // span 2 'c' -> we need to find the appropriate grid line before / after our opposite position.
978 return resolveNamedGridLinePositionAgainstOppositePosition(resolvedOppositePosition, position, side);
981 // 'span 1' is contained inside a single grid track regardless of the direction.
982 // That's why the CSS span value is one more than the offset we apply.
983 size_t positionOffset = position.spanPosition() - 1;
984 if (side == ColumnStartSide || side == RowStartSide) {
985 size_t initialResolvedPosition = std::max<int>(0, resolvedOppositePosition - positionOffset);
986 return GridSpan::create(initialResolvedPosition, resolvedOppositePosition);
989 return GridSpan::create(resolvedOppositePosition, resolvedOppositePosition + positionOffset);
992 PassOwnPtr<GridSpan> RenderGrid::resolveNamedGridLinePositionAgainstOppositePosition(size_t resolvedOppositePosition, const GridPosition& position, GridPositionSide side) const
994 ASSERT(position.isSpan());
995 ASSERT(!position.namedGridLine().isNull());
996 // Negative positions are not allowed per the specification and should have been handled during parsing.
997 ASSERT(position.spanPosition() > 0);
999 const NamedGridLinesMap& gridLinesNames = (side == ColumnStartSide || side == ColumnEndSide) ? style().namedGridColumnLines() : style().namedGridRowLines();
1000 NamedGridLinesMap::const_iterator it = gridLinesNames.find(position.namedGridLine());
1002 // 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).
1003 // See http://lists.w3.org/Archives/Public/www-style/2013Jun/0394.html.
1004 if (it == gridLinesNames.end())
1005 return GridSpan::create(resolvedOppositePosition, resolvedOppositePosition);
1007 if (side == RowStartSide || side == ColumnStartSide)
1008 return resolveRowStartColumnStartNamedGridLinePositionAgainstOppositePosition(resolvedOppositePosition, position, it->value);
1010 return resolveRowEndColumnEndNamedGridLinePositionAgainstOppositePosition(resolvedOppositePosition, position, it->value);
1013 PassOwnPtr<GridSpan> RenderGrid::resolveRowStartColumnStartNamedGridLinePositionAgainstOppositePosition(size_t resolvedOppositePosition, const GridPosition& position, const Vector<size_t>& gridLines) const
1015 // The grid line inequality needs to be strict (which doesn't match the after / end case) because |resolvedOppositePosition|
1016 // is already converted to an index in our grid representation (ie one was removed from the grid line to account for the side).
1017 size_t firstLineBeforeOppositePositionIndex = 0;
1018 const size_t* firstLineBeforeOppositePosition = std::lower_bound(gridLines.begin(), gridLines.end(), resolvedOppositePosition);
1019 if (firstLineBeforeOppositePosition != gridLines.end())
1020 firstLineBeforeOppositePositionIndex = firstLineBeforeOppositePosition - gridLines.begin();
1022 size_t gridLineIndex = std::max<int>(0, firstLineBeforeOppositePositionIndex - position.spanPosition() + 1);
1023 size_t resolvedGridLinePosition = gridLines[gridLineIndex];
1024 if (resolvedGridLinePosition > resolvedOppositePosition)
1025 resolvedGridLinePosition = resolvedOppositePosition;
1026 return GridSpan::create(resolvedGridLinePosition, resolvedOppositePosition);
1029 PassOwnPtr<GridSpan> RenderGrid::resolveRowEndColumnEndNamedGridLinePositionAgainstOppositePosition(size_t resolvedOppositePosition, const GridPosition& position, const Vector<size_t>& gridLines) const
1031 size_t firstLineAfterOppositePositionIndex = gridLines.size() - 1;
1032 const size_t* firstLineAfterOppositePosition = std::upper_bound(gridLines.begin(), gridLines.end(), resolvedOppositePosition);
1033 if (firstLineAfterOppositePosition != gridLines.end())
1034 firstLineAfterOppositePositionIndex = firstLineAfterOppositePosition - gridLines.begin();
1036 size_t gridLineIndex = std::min(gridLines.size() - 1, firstLineAfterOppositePositionIndex + position.spanPosition() - 1);
1037 size_t resolvedGridLinePosition = GridPosition::adjustGridPositionForRowEndColumnEndSide(gridLines[gridLineIndex]);
1038 if (resolvedGridLinePosition < resolvedOppositePosition)
1039 resolvedGridLinePosition = resolvedOppositePosition;
1040 return GridSpan::create(resolvedOppositePosition, resolvedGridLinePosition);
1043 LayoutUnit RenderGrid::gridAreaBreadthForChild(const RenderBox* child, GridTrackSizingDirection direction, const Vector<GridTrack>& tracks) const
1045 const GridCoordinate& coordinate = cachedGridCoordinate(child);
1046 const GridSpan& span = (direction == ForColumns) ? coordinate.columns : coordinate.rows;
1047 LayoutUnit gridAreaBreadth = 0;
1048 for (size_t trackIndex = span.initialPositionIndex; trackIndex <= span.finalPositionIndex; ++trackIndex)
1049 gridAreaBreadth += tracks[trackIndex].m_usedBreadth;
1050 return gridAreaBreadth;
1053 void RenderGrid::populateGridPositions(const GridSizingData& sizingData)
1055 m_columnPositions.resizeToFit(sizingData.columnTracks.size() + 1);
1056 m_columnPositions[0] = borderAndPaddingStart();
1057 for (size_t i = 0; i < m_columnPositions.size() - 1; ++i)
1058 m_columnPositions[i + 1] = m_columnPositions[i] + sizingData.columnTracks[i].m_usedBreadth;
1060 m_rowPositions.resizeToFit(sizingData.rowTracks.size() + 1);
1061 m_rowPositions[0] = borderAndPaddingBefore();
1062 for (size_t i = 0; i < m_rowPositions.size() - 1; ++i)
1063 m_rowPositions[i + 1] = m_rowPositions[i] + sizingData.rowTracks[i].m_usedBreadth;
1066 LayoutPoint RenderGrid::findChildLogicalPosition(RenderBox* child, const GridSizingData& sizingData)
1068 const GridCoordinate& coordinate = cachedGridCoordinate(child);
1069 ASSERT_UNUSED(sizingData, coordinate.columns.initialPositionIndex < sizingData.columnTracks.size());
1070 ASSERT_UNUSED(sizingData, coordinate.rows.initialPositionIndex < sizingData.rowTracks.size());
1072 // The grid items should be inside the grid container's border box, that's why they need to be shifted.
1073 return LayoutPoint(m_columnPositions[coordinate.columns.initialPositionIndex] + marginStartForChild(*child), m_rowPositions[coordinate.rows.initialPositionIndex] + marginBeforeForChild(*child));
1076 void RenderGrid::paintChildren(PaintInfo& paintInfo, const LayoutPoint& paintOffset, PaintInfo& forChild, bool usePrintRect)
1078 for (RenderBox* child = m_orderIterator.first(); child; child = m_orderIterator.next())
1079 paintChild(*child, paintInfo, paintOffset, forChild, usePrintRect);
1082 const char* RenderGrid::renderName() const
1085 return "RenderGrid (floating)";
1086 if (isOutOfFlowPositioned())
1087 return "RenderGrid (positioned)";
1089 return "RenderGrid (generated)";
1090 if (isRelPositioned())
1091 return "RenderGrid (relative positioned)";
1092 return "RenderGrid";
1095 } // namespace WebCore
1097 #endif /* ENABLE(CSS_GRID_LAYOUT) */