layout/tables/nsTableRowFrame.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "nsTableRowFrame.h"
   7
   8 #include "mozilla/Baseline.h"
   9 #include "mozilla/Maybe.h"
  10 #include "mozilla/PresShell.h"
  11 #include "nsTableRowGroupFrame.h"
  12 #include "nsPresContext.h"
  13 #include "mozilla/ComputedStyle.h"
  14 #include "mozilla/StaticPrefs_layout.h"
  15 #include "nsStyleConsts.h"
  16 #include "nsIContent.h"
  17 #include "nsIFrame.h"
  18 #include "nsIFrameInlines.h"
  19 #include "nsTableFrame.h"
  20 #include "nsTableCellFrame.h"
  21 #include "nsCSSRendering.h"
  22 #include "nsHTMLParts.h"
  23 #include "nsTableColGroupFrame.h"
  24 #include "nsTableColFrame.h"
  25 #include "nsDisplayList.h"
  26 #include <algorithm>
  27
  28 #ifdef ACCESSIBILITY
  29 #  include "nsAccessibilityService.h"
  30 #endif
  31
  32 using namespace mozilla;
  33
  34 namespace mozilla {
  35
  36 struct TableCellReflowInput : public ReflowInput {
  37   TableCellReflowInput(nsPresContext* aPresContext,
  38                        const ReflowInput& aParentReflowInput, nsIFrame* aFrame,
  39                        const LogicalSize& aAvailableSpace,
  40                        ReflowInput::InitFlags aFlags = {})
  41       : ReflowInput(aPresContext, aParentReflowInput, aFrame, aAvailableSpace,
  42                     Nothing(), aFlags) {}
  43
  44   void FixUp(const LogicalSize& aAvailSpace);
  45 };
  46
  47 }  // namespace mozilla
  48
  49 void TableCellReflowInput::FixUp(const LogicalSize& aAvailSpace) {
  50   // fix the mComputed values during a pass 2 reflow since the cell can be a
  51   // percentage base
  52   NS_WARNING_ASSERTION(
  53       NS_UNCONSTRAINEDSIZE != aAvailSpace.ISize(mWritingMode),
  54       "have unconstrained inline-size; this should only result from very large "
  55       "sizes, not attempts at intrinsic inline size calculation");
  56   if (NS_UNCONSTRAINEDSIZE != ComputedISize()) {
  57     nscoord computedISize =
  58         aAvailSpace.ISize(mWritingMode) -
  59         ComputedLogicalBorderPadding(mWritingMode).IStartEnd(mWritingMode);
  60     computedISize = std::max(0, computedISize);
  61     SetComputedISize(computedISize);
  62   }
  63   if (NS_UNCONSTRAINEDSIZE != ComputedBSize() &&
  64       NS_UNCONSTRAINEDSIZE != aAvailSpace.BSize(mWritingMode)) {
  65     nscoord computedBSize =
  66         aAvailSpace.BSize(mWritingMode) -
  67         ComputedLogicalBorderPadding(mWritingMode).BStartEnd(mWritingMode);
  68     computedBSize = std::max(0, computedBSize);
  69     SetComputedBSize(computedBSize);
  70   }
  71 }
  72
  73 void nsTableRowFrame::InitChildReflowInput(nsPresContext& aPresContext,
  74                                            const LogicalSize& aAvailSize,
  75                                            bool aBorderCollapse,
  76                                            TableCellReflowInput& aReflowInput) {
  77   Maybe<LogicalMargin> collapseBorder;
  78   if (aBorderCollapse) {
  79     // we only reflow cells, so don't need to check frame type
  80     nsBCTableCellFrame* bcCellFrame = (nsBCTableCellFrame*)aReflowInput.mFrame;
  81     if (bcCellFrame) {
  82       collapseBorder.emplace(
  83           bcCellFrame->GetBorderWidth(aReflowInput.GetWritingMode()));
  84     }
  85   }
  86   aReflowInput.Init(&aPresContext, Nothing(), collapseBorder);
  87   aReflowInput.FixUp(aAvailSize);
  88 }
  89
  90 void nsTableRowFrame::SetFixedBSize(nscoord aValue) {
  91   nscoord bsize = std::max(0, aValue);
  92   if (HasFixedBSize()) {
  93     if (bsize > mStyleFixedBSize) {
  94       mStyleFixedBSize = bsize;
  95     }
  96   } else {
  97     mStyleFixedBSize = bsize;
  98     if (bsize > 0) {
  99       SetHasFixedBSize(true);
 100     }
 101   }
 102 }
 103
 104 void nsTableRowFrame::SetPctBSize(float aPctValue, bool aForce) {
 105   nscoord bsize = std::max(0, NSToCoordRound(aPctValue * 100.0f));
 106   if (HasPctBSize()) {
 107     if ((bsize > mStylePctBSize) || aForce) {
 108       mStylePctBSize = bsize;
 109     }
 110   } else {
 111     mStylePctBSize = bsize;
 112     if (bsize > 0) {
 113       SetHasPctBSize(true);
 114     }
 115   }
 116 }
 117
 118 /* ----------- nsTableRowFrame ---------- */
 119
 120 NS_QUERYFRAME_HEAD(nsTableRowFrame)
 121   NS_QUERYFRAME_ENTRY(nsTableRowFrame)
 122 NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
 123
 124 nsTableRowFrame::nsTableRowFrame(ComputedStyle* aStyle,
 125                                  nsPresContext* aPresContext, ClassID aID)
 126     : nsContainerFrame(aStyle, aPresContext, aID) {
 127   mBits.mRowIndex = 0;
 128   mBits.mHasFixedBSize = 0;
 129   mBits.mHasPctBSize = 0;
 130   mBits.mFirstInserted = 0;
 131   ResetBSize();
 132 }
 133
 134 nsTableRowFrame::~nsTableRowFrame() = default;
 135
 136 void nsTableRowFrame::Init(nsIContent* aContent, nsContainerFrame* aParent,
 137                            nsIFrame* aPrevInFlow) {
 138   // Let the base class do its initialization
 139   nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
 140
 141   NS_ASSERTION(mozilla::StyleDisplay::TableRow == StyleDisplay()->mDisplay,
 142                "wrong display on table row frame");
 143
 144   if (aPrevInFlow) {
 145     // Set the row index
 146     nsTableRowFrame* rowFrame = (nsTableRowFrame*)aPrevInFlow;
 147
 148     SetRowIndex(rowFrame->GetRowIndex());
 149   } else {
 150     mWritingMode = GetTableFrame()->GetWritingMode();
 151   }
 152 }
 153
 154 void nsTableRowFrame::Destroy(DestroyContext& aContext) {
 155   nsTableFrame::MaybeUnregisterPositionedTablePart(this);
 156   nsContainerFrame::Destroy(aContext);
 157 }
 158
 159 /* virtual */
 160 void nsTableRowFrame::DidSetComputedStyle(ComputedStyle* aOldComputedStyle) {
 161   nsContainerFrame::DidSetComputedStyle(aOldComputedStyle);
 162   nsTableFrame::PositionedTablePartMaybeChanged(this, aOldComputedStyle);
 163
 164   if (!aOldComputedStyle) {
 165     return;  // avoid the following on init
 166   }
 167
 168 #ifdef ACCESSIBILITY
 169   if (nsAccessibilityService* accService = GetAccService()) {
 170     // If a table row's background color is now different from
 171     // the background color of its previous row, it is possible our
 172     // table now has alternating row colors. This changes whether or not
 173     // the table is classified as a layout table or data table.
 174     // We invalidate on every background color change to avoid
 175     // walking the tree in search of the nearest row.
 176     if (StyleBackground()->BackgroundColor(this) !=
 177         aOldComputedStyle->StyleBackground()->BackgroundColor(
 178             aOldComputedStyle)) {
 179       // We send a notification here to invalidate the a11y cache on the
 180       // table so the next fetch of IsProbablyLayoutTable() is accurate.
 181       accService->TableLayoutGuessMaybeChanged(PresShell(), mContent);
 182     }
 183   }
 184 #endif
 185
 186   nsTableFrame* tableFrame = GetTableFrame();
 187   if (tableFrame->IsBorderCollapse() &&
 188       tableFrame->BCRecalcNeeded(aOldComputedStyle, Style())) {
 189     TableArea damageArea(0, GetRowIndex(), tableFrame->GetColCount(), 1);
 190     tableFrame->AddBCDamageArea(damageArea);
 191   }
 192 }
 193
 194 void nsTableRowFrame::AppendFrames(ChildListID aListID,
 195                                    nsFrameList&& aFrameList) {
 196   NS_ASSERTION(aListID == FrameChildListID::Principal, "unexpected child list");
 197
 198   DrainSelfOverflowList();  // ensure the last frame is in mFrames
 199   const nsFrameList::Slice& newCells =
 200       mFrames.AppendFrames(nullptr, std::move(aFrameList));
 201
 202   // Add the new cell frames to the table
 203   nsTableFrame* tableFrame = GetTableFrame();
 204   for (nsIFrame* childFrame : newCells) {
 205     NS_ASSERTION(childFrame->IsTableCellFrame(),
 206                  "Not a table cell frame/pseudo frame construction failure");
 207     tableFrame->AppendCell(static_cast<nsTableCellFrame&>(*childFrame),
 208                            GetRowIndex());
 209   }
 210
 211   PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors,
 212                                 NS_FRAME_HAS_DIRTY_CHILDREN);
 213   tableFrame->SetGeometryDirty();
 214 }
 215
 216 void nsTableRowFrame::InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
 217                                    const nsLineList::iterator* aPrevFrameLine,
 218                                    nsFrameList&& aFrameList) {
 219   NS_ASSERTION(aListID == FrameChildListID::Principal, "unexpected child list");
 220   NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
 221                "inserting after sibling frame with different parent");
 222   if (mFrames.IsEmpty() || (aPrevFrame && !aPrevFrame->GetNextSibling())) {
 223     // This is actually an append (though our caller didn't figure that out),
 224     // and our append codepath is both simpler/faster _and_ less buggy.
 225     // https://bugzilla.mozilla.org/show_bug.cgi?id=1388898 tracks the bugginess
 226     AppendFrames(aListID, std::move(aFrameList));
 227     return;
 228   }
 229
 230   DrainSelfOverflowList();  // ensure aPrevFrame is in mFrames
 231   // Insert Frames in the frame list
 232   const nsFrameList::Slice& newCells =
 233       mFrames.InsertFrames(nullptr, aPrevFrame, std::move(aFrameList));
 234
 235   nsTableCellFrame* prevCellFrame =
 236       static_cast<nsTableCellFrame*>(nsTableFrame::GetFrameAtOrBefore(
 237           this, aPrevFrame, LayoutFrameType::TableCell));
 238   nsTArray<nsTableCellFrame*> cellChildren;
 239   for (nsIFrame* childFrame : newCells) {
 240     NS_ASSERTION(childFrame->IsTableCellFrame(),
 241                  "Not a table cell frame/pseudo frame construction failure");
 242     cellChildren.AppendElement(static_cast<nsTableCellFrame*>(childFrame));
 243   }
 244   // insert the cells into the cell map
 245   int32_t colIndex = -1;
 246   if (prevCellFrame) {
 247     colIndex = prevCellFrame->ColIndex();
 248   }
 249   nsTableFrame* tableFrame = GetTableFrame();
 250   tableFrame->InsertCells(cellChildren, GetRowIndex(), colIndex);
 251
 252   PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors,
 253                                 NS_FRAME_HAS_DIRTY_CHILDREN);
 254   tableFrame->SetGeometryDirty();
 255 }
 256
 257 void nsTableRowFrame::RemoveFrame(DestroyContext& aContext, ChildListID aListID,
 258                                   nsIFrame* aOldFrame) {
 259   NS_ASSERTION(aListID == FrameChildListID::Principal, "unexpected child list");
 260   MOZ_ASSERT((nsTableCellFrame*)do_QueryFrame(aOldFrame));
 261
 262   auto* cellFrame = static_cast<nsTableCellFrame*>(aOldFrame);
 263   // remove the cell from the cell map
 264   nsTableFrame* tableFrame = GetTableFrame();
 265   tableFrame->RemoveCell(cellFrame, GetRowIndex());
 266
 267   // Remove the frame and destroy it
 268   mFrames.DestroyFrame(aContext, aOldFrame);
 269
 270   PresShell()->FrameNeedsReflow(this, IntrinsicDirty::FrameAndAncestors,
 271                                 NS_FRAME_HAS_DIRTY_CHILDREN);
 272
 273   tableFrame->SetGeometryDirty();
 274 }
 275
 276 /* virtual */
 277 nsMargin nsTableRowFrame::GetUsedMargin() const { return nsMargin(0, 0, 0, 0); }
 278
 279 /* virtual */
 280 nsMargin nsTableRowFrame::GetUsedBorder() const { return nsMargin(0, 0, 0, 0); }
 281
 282 /* virtual */
 283 nsMargin nsTableRowFrame::GetUsedPadding() const {
 284   return nsMargin(0, 0, 0, 0);
 285 }
 286
 287 static nscoord GetBSizeOfRowsSpannedBelowFirst(
 288     nsTableCellFrame& aTableCellFrame, nsTableFrame& aTableFrame,
 289     const WritingMode aWM) {
 290   nscoord bsize = 0;
 291   int32_t rowSpan = aTableFrame.GetEffectiveRowSpan(aTableCellFrame);
 292   // add in bsize of rows spanned beyond the 1st one
 293   nsIFrame* nextRow = aTableCellFrame.GetParent()->GetNextSibling();
 294   for (int32_t rowX = 1; ((rowX < rowSpan) && nextRow);) {
 295     if (nextRow->IsTableRowFrame()) {
 296       bsize += nextRow->BSize(aWM);
 297       rowX++;
 298     }
 299     bsize += aTableFrame.GetRowSpacing(rowX);
 300     nextRow = nextRow->GetNextSibling();
 301   }
 302   return bsize;
 303 }
 304
 305 /**
 306  * Post-reflow hook. This is where the table row does its post-processing
 307  */
 308 void nsTableRowFrame::DidResize(ForceAlignTopForTableCell aForceAlignTop) {
 309   // Resize and re-align the cell frames based on our row bsize
 310   nsTableFrame* tableFrame = GetTableFrame();
 311
 312   WritingMode wm = GetWritingMode();
 313   ReflowOutput desiredSize(wm);
 314   desiredSize.SetSize(wm, GetLogicalSize(wm));
 315   desiredSize.SetOverflowAreasToDesiredBounds();
 316
 317   nsSize containerSize = mRect.Size();
 318
 319   for (nsTableCellFrame* cellFrame = GetFirstCell(); cellFrame;
 320        cellFrame = cellFrame->GetNextCell()) {
 321     nscoord cellBSize = BSize(wm) + GetBSizeOfRowsSpannedBelowFirst(
 322                                         *cellFrame, *tableFrame, wm);
 323
 324     // If the bsize for the cell has changed, we need to reset it;
 325     // and in vertical-rl mode, we need to update the cell's block position
 326     // to account for the containerSize, which may not have been known
 327     // earlier, so we always apply it here.
 328     LogicalSize cellSize = cellFrame->GetLogicalSize(wm);
 329     if (cellSize.BSize(wm) != cellBSize || wm.IsVerticalRL()) {
 330       nsRect cellOldRect = cellFrame->GetRect();
 331       nsRect cellInkOverflow = cellFrame->InkOverflowRect();
 332
 333       if (wm.IsVerticalRL()) {
 334         // Get the old position of the cell, as we want to preserve its
 335         // inline coordinate.
 336         LogicalPoint oldPos = cellFrame->GetLogicalPosition(wm, containerSize);
 337
 338         // The cell should normally be aligned with the row's block-start,
 339         // so set the B component of the position to zero:
 340         LogicalPoint newPos(wm, oldPos.I(wm), 0);
 341
 342         // ...unless relative positioning is in effect, in which case the
 343         // cell may have been moved away from the row's block-start
 344         if (cellFrame->IsRelativelyOrStickyPositioned()) {
 345           // Find out where the cell would have been without relative
 346           // positioning.
 347           LogicalPoint oldNormalPos =
 348               cellFrame->GetLogicalNormalPosition(wm, containerSize);
 349           // The difference (if any) between oldPos and oldNormalPos reflects
 350           // relative positioning that was applied to the cell, and which we
 351           // need to incorporate when resetting the position.
 352           newPos.B(wm) = oldPos.B(wm) - oldNormalPos.B(wm);
 353         }
 354
 355         if (oldPos != newPos) {
 356           cellFrame->SetPosition(wm, newPos, containerSize);
 357           nsTableFrame::RePositionViews(cellFrame);
 358         }
 359       }
 360
 361       cellSize.BSize(wm) = cellBSize;
 362       cellFrame->SetSize(wm, cellSize);
 363
 364       if (tableFrame->IsBorderCollapse()) {
 365         nsTableFrame::InvalidateTableFrame(cellFrame, cellOldRect,
 366                                            cellInkOverflow, false);
 367       }
 368     }
 369
 370     // realign cell content based on the new bsize.  We might be able to
 371     // skip this if the bsize didn't change... maybe.  Hard to tell.
 372     cellFrame->BlockDirAlignChild(wm, mMaxCellAscent, aForceAlignTop);
 373
 374     // Always store the overflow, even if the height didn't change, since
 375     // we'll lose part of our overflow area otherwise.
 376     ConsiderChildOverflow(desiredSize.mOverflowAreas, cellFrame);
 377
 378     // Note that if the cell's *content* needs to change in response
 379     // to this height, it will get a special bsize reflow.
 380   }
 381   FinishAndStoreOverflow(&desiredSize);
 382   if (HasView()) {
 383     nsContainerFrame::SyncFrameViewAfterReflow(PresContext(), this, GetView(),
 384                                                desiredSize.InkOverflow(),
 385                                                ReflowChildFlags::Default);
 386   }
 387   // Let our base class do the usual work
 388 }
 389
 390 // returns max-ascent amongst all cells that have 'vertical-align: baseline'
 391 // *including* cells with rowspans
 392 nscoord nsTableRowFrame::GetMaxCellAscent() const { return mMaxCellAscent; }
 393
 394 Maybe<nscoord> nsTableRowFrame::GetRowBaseline(WritingMode aWM) {
 395   if (mMaxCellAscent) {
 396     return Some(mMaxCellAscent);
 397   }
 398
 399   // If we get here, we don't have a baseline on any of the cells in this row.
 400   if (aWM.IsCentralBaseline()) {
 401     return Nothing{};
 402   }
 403   nscoord ascent = 0;
 404   for (nsIFrame* childFrame : mFrames) {
 405     MOZ_ASSERT(childFrame->IsTableCellFrame());
 406     nscoord s = Baseline::SynthesizeBOffsetFromContentBox(
 407         childFrame, aWM, BaselineSharingGroup::First);
 408     ascent = std::max(ascent, s);
 409   }
 410   return Some(ascent);
 411 }
 412
 413 nscoord nsTableRowFrame::GetInitialBSize(nscoord aPctBasis) const {
 414   nscoord bsize = 0;
 415   if ((aPctBasis > 0) && HasPctBSize()) {
 416     bsize = NSToCoordRound(GetPctBSize() * (float)aPctBasis);
 417   }
 418   if (HasFixedBSize()) {
 419     bsize = std::max(bsize, GetFixedBSize());
 420   }
 421   return std::max(bsize, GetContentBSize());
 422 }
 423
 424 void nsTableRowFrame::ResetBSize() {
 425   SetHasFixedBSize(false);
 426   SetHasPctBSize(false);
 427   SetFixedBSize(0);
 428   SetPctBSize(0);
 429   SetContentBSize(0);
 430
 431   mMaxCellAscent = 0;
 432   mMaxCellDescent = 0;
 433 }
 434
 435 void nsTableRowFrame::UpdateBSize(nscoord aBSize, nscoord aAscent,
 436                                   nscoord aDescent, nsTableFrame* aTableFrame,
 437                                   nsTableCellFrame* aCellFrame) {
 438   if (!aTableFrame || !aCellFrame) {
 439     NS_ASSERTION(false, "invalid call");
 440     return;
 441   }
 442
 443   if (aBSize == NS_UNCONSTRAINEDSIZE) {
 444     return;
 445   }
 446
 447   if (GetInitialBSize() < aBSize &&
 448       aTableFrame->GetEffectiveRowSpan(*aCellFrame) == 1) {
 449     SetContentBSize(aBSize);
 450   }
 451
 452   if (aCellFrame->HasVerticalAlignBaseline()) {
 453     NS_ASSERTION(
 454         aAscent != NS_UNCONSTRAINEDSIZE && aDescent != NS_UNCONSTRAINEDSIZE,
 455         "invalid call");
 456     // see if this is a long ascender
 457     if (mMaxCellAscent < aAscent) {
 458       mMaxCellAscent = aAscent;
 459     }
 460     // see if this is a long descender and without rowspan
 461     if (mMaxCellDescent < aDescent) {
 462       if (aTableFrame->GetEffectiveRowSpan(*aCellFrame) == 1) {
 463         mMaxCellDescent = aDescent;
 464       }
 465     }
 466   }
 467 }
 468
 469 nscoord nsTableRowFrame::CalcBSize(const ReflowInput& aReflowInput) {
 470   nsTableFrame* tableFrame = GetTableFrame();
 471
 472   ResetBSize();
 473   const nscoord computedBSize = aReflowInput.ComputedBSize();
 474   if (computedBSize != NS_UNCONSTRAINEDSIZE && computedBSize > 0) {
 475     SetFixedBSize(computedBSize);
 476   }
 477
 478   WritingMode wm = aReflowInput.GetWritingMode();
 479   const nsStylePosition* position = StylePosition();
 480   const auto& bsizeStyleCoord = position->BSize(wm);
 481   if (bsizeStyleCoord.ConvertsToLength()) {
 482     SetFixedBSize(bsizeStyleCoord.ToLength());
 483   } else if (bsizeStyleCoord.ConvertsToPercentage()) {
 484     SetPctBSize(bsizeStyleCoord.ToPercentage());
 485   }
 486
 487   for (nsTableCellFrame* kidFrame = GetFirstCell(); kidFrame;
 488        kidFrame = kidFrame->GetNextCell()) {
 489     MOZ_ASSERT(kidFrame->GetWritingMode() == wm);
 490     LogicalSize desSize = kidFrame->GetDesiredSize();
 491     if (NS_UNCONSTRAINEDSIZE == aReflowInput.AvailableBSize() &&
 492         !GetPrevInFlow()) {
 493       desSize.BSize(wm) = CalcCellActualBSize(kidFrame, desSize.BSize(wm), wm);
 494     }
 495     // bsize may have changed, adjust descent to absorb any excess difference
 496     nscoord ascent;
 497     if (!kidFrame->PrincipalChildList()
 498              .FirstChild()
 499              ->PrincipalChildList()
 500              .FirstChild()) {
 501       ascent = desSize.BSize(wm);
 502     } else {
 503       ascent = kidFrame->GetCellBaseline();
 504     }
 505     nscoord descent = desSize.BSize(wm) - ascent;
 506     UpdateBSize(desSize.BSize(wm), ascent, descent, tableFrame, kidFrame);
 507   }
 508   return GetInitialBSize();
 509 }
 510
 511 void nsTableRowFrame::PaintCellBackgroundsForFrame(
 512     nsIFrame* aFrame, nsDisplayListBuilder* aBuilder,
 513     const nsDisplayListSet& aLists, const nsPoint& aOffset) {
 514   // Compute background rect by iterating all cell frame.
 515   const nsPoint toReferenceFrame = aBuilder->ToReferenceFrame(aFrame);
 516   for (nsTableCellFrame* cell = GetFirstCell(); cell;
 517        cell = cell->GetNextCell()) {
 518     if (!cell->ShouldPaintBackground(aBuilder)) {
 519       continue;
 520     }
 521
 522     auto cellRect =
 523         cell->GetRectRelativeToSelf() + cell->GetNormalPosition() + aOffset;
 524     if (!aBuilder->GetDirtyRect().Intersects(cellRect)) {
 525       continue;
 526     }
 527     cellRect += toReferenceFrame;
 528     nsDisplayBackgroundImage::AppendBackgroundItemsToTop(
 529         aBuilder, aFrame, cellRect, aLists.BorderBackground(), true,
 530         aFrame->GetRectRelativeToSelf() + toReferenceFrame, cell);
 531   }
 532 }
 533
 534 void nsTableRowFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
 535                                        const nsDisplayListSet& aLists) {
 536   DisplayOutsetBoxShadow(aBuilder, aLists.BorderBackground());
 537
 538   PaintCellBackgroundsForFrame(this, aBuilder, aLists);
 539
 540   DisplayInsetBoxShadow(aBuilder, aLists.BorderBackground());
 541
 542   DisplayOutline(aBuilder, aLists);
 543
 544   for (nsIFrame* kid : PrincipalChildList()) {
 545     BuildDisplayListForChild(aBuilder, kid, aLists);
 546   }
 547 }
 548
 549 LogicalSides nsTableRowFrame::GetLogicalSkipSides() const {
 550   LogicalSides skip(mWritingMode);
 551   if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
 552                    StyleBoxDecorationBreak::Clone)) {
 553     return skip;
 554   }
 555
 556   if (GetPrevInFlow()) {
 557     skip += LogicalSide::BStart;
 558   }
 559   if (GetNextInFlow()) {
 560     skip += LogicalSide::BEnd;
 561   }
 562   return skip;
 563 }
 564
 565 nscoord nsTableRowFrame::CalcCellActualBSize(nsTableCellFrame* aCellFrame,
 566                                              const nscoord& aDesiredBSize,
 567                                              WritingMode aWM) {
 568   nscoord specifiedBSize = 0;
 569
 570   // Get the bsize specified in the style information
 571   const nsStylePosition* position = aCellFrame->StylePosition();
 572
 573   int32_t rowSpan = GetTableFrame()->GetEffectiveRowSpan(*aCellFrame);
 574
 575   const auto& bsizeStyleCoord = position->BSize(aWM);
 576   if (bsizeStyleCoord.ConvertsToLength()) {
 577     // In quirks mode, table cell bsize should always be border-box.
 578     // https://quirks.spec.whatwg.org/#the-table-cell-height-box-sizing-quirk
 579     specifiedBSize = bsizeStyleCoord.ToLength();
 580     if (PresContext()->CompatibilityMode() != eCompatibility_NavQuirks &&
 581         position->mBoxSizing == StyleBoxSizing::Content) {
 582       specifiedBSize +=
 583           aCellFrame->GetLogicalUsedBorderAndPadding(aWM).BStartEnd(aWM);
 584     }
 585
 586     if (1 == rowSpan) {
 587       SetFixedBSize(specifiedBSize);
 588     }
 589   } else if (bsizeStyleCoord.ConvertsToPercentage()) {
 590     if (1 == rowSpan) {
 591       SetPctBSize(bsizeStyleCoord.ToPercentage());
 592     }
 593   }
 594
 595   // If the specified bsize is greater than the desired bsize,
 596   // then use the specified bsize
 597   return std::max(specifiedBSize, aDesiredBSize);
 598 }
 599
 600 // Calculates the available isize for the table cell based on the known
 601 // column isizes taking into account column spans and column spacing
 602 static nscoord CalcAvailISize(nsTableFrame& aTableFrame,
 603                               nsTableCellFrame& aCellFrame) {
 604   nscoord cellAvailISize = 0;
 605   uint32_t colIndex = aCellFrame.ColIndex();
 606   int32_t colspan = aTableFrame.GetEffectiveColSpan(aCellFrame);
 607   NS_ASSERTION(colspan > 0, "effective colspan should be positive");
 608   nsTableFrame* fifTable =
 609       static_cast<nsTableFrame*>(aTableFrame.FirstInFlow());
 610
 611   for (int32_t spanX = 0; spanX < colspan; spanX++) {
 612     cellAvailISize += fifTable->GetColumnISizeFromFirstInFlow(colIndex + spanX);
 613     if (spanX > 0 && aTableFrame.ColumnHasCellSpacingBefore(colIndex + spanX)) {
 614       cellAvailISize += aTableFrame.GetColSpacing(colIndex + spanX - 1);
 615     }
 616   }
 617   return cellAvailISize;
 618 }
 619
 620 static nscoord GetSpaceBetween(int32_t aPrevColIndex, int32_t aColIndex,
 621                                int32_t aColSpan, nsTableFrame& aTableFrame,
 622                                bool aCheckVisibility) {
 623   nscoord space = 0;
 624   int32_t colIdx;
 625   nsTableFrame* fifTable =
 626       static_cast<nsTableFrame*>(aTableFrame.FirstInFlow());
 627   for (colIdx = aPrevColIndex + 1; aColIndex > colIdx; colIdx++) {
 628     bool isCollapsed = false;
 629     if (!aCheckVisibility) {
 630       space += fifTable->GetColumnISizeFromFirstInFlow(colIdx);
 631     } else {
 632       nsTableColFrame* colFrame = aTableFrame.GetColFrame(colIdx);
 633       const nsStyleVisibility* colVis = colFrame->StyleVisibility();
 634       bool collapseCol = StyleVisibility::Collapse == colVis->mVisible;
 635       nsIFrame* cgFrame = colFrame->GetParent();
 636       const nsStyleVisibility* groupVis = cgFrame->StyleVisibility();
 637       bool collapseGroup = StyleVisibility::Collapse == groupVis->mVisible;
 638       isCollapsed = collapseCol || collapseGroup;
 639       if (!isCollapsed) {
 640         space += fifTable->GetColumnISizeFromFirstInFlow(colIdx);
 641       }
 642     }
 643     if (!isCollapsed && aTableFrame.ColumnHasCellSpacingBefore(colIdx)) {
 644       space += aTableFrame.GetColSpacing(colIdx - 1);
 645     }
 646   }
 647   return space;
 648 }
 649
 650 // subtract the bsizes of aRow's prev in flows from the unpaginated bsize
 651 static nscoord CalcBSizeFromUnpaginatedBSize(nsTableRowFrame& aRow,
 652                                              WritingMode aWM) {
 653   nscoord bsize = 0;
 654   nsTableRowFrame* firstInFlow =
 655       static_cast<nsTableRowFrame*>(aRow.FirstInFlow());
 656   if (firstInFlow->HasUnpaginatedBSize()) {
 657     bsize = firstInFlow->GetUnpaginatedBSize();
 658     for (nsIFrame* prevInFlow = aRow.GetPrevInFlow(); prevInFlow;
 659          prevInFlow = prevInFlow->GetPrevInFlow()) {
 660       bsize -= prevInFlow->BSize(aWM);
 661     }
 662   }
 663   return std::max(bsize, 0);
 664 }
 665
 666 void nsTableRowFrame::ReflowChildren(nsPresContext* aPresContext,
 667                                      ReflowOutput& aDesiredSize,
 668                                      const ReflowInput& aReflowInput,
 669                                      nsTableFrame& aTableFrame,
 670                                      nsReflowStatus& aStatus) {
 671   aStatus.Reset();
 672
 673   // XXXldb Should we be checking constrained bsize instead?
 674   const bool isPaginated = aPresContext->IsPaginated();
 675   const bool borderCollapse = aTableFrame.IsBorderCollapse();
 676
 677   int32_t cellColSpan =
 678       1;  // must be defined here so it's set properly for non-cell kids
 679
 680   // remember the col index of the previous cell to handle rowspans into this
 681   // row
 682   int32_t prevColIndex = -1;
 683   nscoord iCoord = 0;  // running total of children inline-coord offset
 684
 685   // This computes the max of all cell bsizes
 686   nscoord cellMaxBSize = 0;
 687
 688   // Reflow each of our existing cell frames
 689   WritingMode wm = aReflowInput.GetWritingMode();
 690   nsSize containerSize = aReflowInput.ComputedSizeAsContainerIfConstrained();
 691
 692   for (nsTableCellFrame* kidFrame = GetFirstCell(); kidFrame;
 693        kidFrame = kidFrame->GetNextCell()) {
 694     // See if we should only reflow the dirty child frames
 695     bool doReflowChild = true;
 696     if (!aReflowInput.ShouldReflowAllKids() && !aTableFrame.IsGeometryDirty() &&
 697         !kidFrame->IsSubtreeDirty()) {
 698       if (!aReflowInput.mFlags.mSpecialBSizeReflow) {
 699         doReflowChild = false;
 700       }
 701     } else if (NS_UNCONSTRAINEDSIZE != aReflowInput.AvailableBSize()) {
 702       // We don't reflow a rowspan >1 cell here with a constrained bsize.
 703       // That happens in nsTableRowGroupFrame::SplitSpanningCells.
 704       if (aTableFrame.GetEffectiveRowSpan(*kidFrame) > 1) {
 705         doReflowChild = false;
 706       }
 707     }
 708     if (aReflowInput.mFlags.mSpecialBSizeReflow && !isPaginated &&
 709         !kidFrame->HasAnyStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE)) {
 710       continue;
 711     }
 712
 713     uint32_t cellColIndex = kidFrame->ColIndex();
 714     cellColSpan = aTableFrame.GetEffectiveColSpan(*kidFrame);
 715
 716     // If the adjacent cell is in a prior row (because of a rowspan) add in the
 717     // space NOTE: prevColIndex can be -1 here.
 718     if (prevColIndex != (static_cast<int32_t>(cellColIndex) - 1)) {
 719       iCoord += GetSpaceBetween(prevColIndex, cellColIndex, cellColSpan,
 720                                 aTableFrame, false);
 721     }
 722
 723     // remember the rightmost (ltr) or leftmost (rtl) column this cell spans
 724     // into
 725     prevColIndex = cellColIndex + (cellColSpan - 1);
 726
 727     // Reflow the child frame
 728     nsRect kidRect = kidFrame->GetRect();
 729     LogicalPoint origKidNormalPosition =
 730         kidFrame->GetLogicalNormalPosition(wm, containerSize);
 731
 732     nsRect kidInkOverflow = kidFrame->InkOverflowRect();
 733     LogicalPoint kidPosition(wm, iCoord, 0);
 734     bool firstReflow = kidFrame->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);
 735
 736     if (doReflowChild) {
 737       // Calculate the available isize for the table cell using the known
 738       // column isizes
 739       nscoord availCellISize = CalcAvailISize(aTableFrame, *kidFrame);
 740
 741       Maybe<TableCellReflowInput> kidReflowInput;
 742       ReflowOutput desiredSize(aReflowInput);
 743
 744       // If the avail isize is not the same as last time we reflowed the cell or
 745       // the cell wants to be bigger than what was available last time or
 746       // it is a style change reflow or we are printing, then we must reflow the
 747       // cell. Otherwise we can skip the reflow.
 748       // XXXldb Why is this condition distinct from doReflowChild above?
 749       NS_ASSERTION(kidFrame->GetWritingMode() == wm,
 750                    "expected consistent writing-mode within table");
 751       LogicalSize cellDesiredSize = kidFrame->GetDesiredSize();
 752       if (availCellISize != kidFrame->GetPriorAvailISize() ||
 753           cellDesiredSize.ISize(wm) > kidFrame->GetPriorAvailISize() ||
 754           HasAnyStateBits(NS_FRAME_IS_DIRTY) || isPaginated ||
 755           kidFrame->IsSubtreeDirty() ||
 756           // See if it needs a special reflow, or if it had one that we need to
 757           // undo.
 758           kidFrame->HasAnyStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE) ||
 759           kidFrame->BCBordersChanged() || HasPctBSize()) {
 760         // Reflow the cell to fit the available isize, bsize
 761         // XXX The old IR_ChildIsDirty code used availCellISize here.
 762         LogicalSize kidAvailSize(wm, availCellISize,
 763                                  aReflowInput.AvailableBSize());
 764
 765         // Reflow the child
 766         kidReflowInput.emplace(aPresContext, aReflowInput, kidFrame,
 767                                kidAvailSize,
 768                                ReflowInput::InitFlag::CallerWillInit);
 769         InitChildReflowInput(*aPresContext, kidAvailSize, borderCollapse,
 770                              *kidReflowInput);
 771
 772         nsReflowStatus status;
 773         ReflowChild(kidFrame, aPresContext, desiredSize, *kidReflowInput, wm,
 774                     kidPosition, containerSize, ReflowChildFlags::Default,
 775                     status);
 776
 777         // allow the table to determine if/how the table needs to be rebalanced
 778         // If any of the cells are not complete, then we're not complete
 779         if (status.IsIncomplete()) {
 780           aStatus.Reset();
 781           aStatus.SetIncomplete();
 782         }
 783       } else {
 784         if (iCoord != origKidNormalPosition.I(wm)) {
 785           kidFrame->InvalidateFrameSubtree();
 786         }
 787
 788         desiredSize.SetSize(wm, cellDesiredSize);
 789         desiredSize.mOverflowAreas = kidFrame->GetOverflowAreas();
 790
 791         // if we are in a floated table, our position is not yet established, so
 792         // we cannot reposition our views the containing block will do this for
 793         // us after positioning the table
 794         if (!aTableFrame.IsFloating()) {
 795           // Because we may have moved the frame we need to make sure any views
 796           // are positioned properly. We have to do this, because any one of our
 797           // parent frames could have moved and we have no way of knowing...
 798           nsTableFrame::RePositionViews(kidFrame);
 799         }
 800       }
 801
 802       if (NS_UNCONSTRAINEDSIZE == aReflowInput.AvailableBSize()) {
 803         if (!GetPrevInFlow()) {
 804           desiredSize.BSize(wm) =
 805               CalcCellActualBSize(kidFrame, desiredSize.BSize(wm), wm);
 806         }
 807         // bsize may have changed, adjust descent to absorb any excess
 808         // difference
 809         nscoord ascent;
 810         if (!kidFrame->PrincipalChildList()
 811                  .FirstChild()
 812                  ->PrincipalChildList()
 813                  .FirstChild()) {
 814           ascent = desiredSize.BSize(wm);
 815         } else {
 816           ascent = kidFrame->GetCellBaseline();
 817         }
 818         nscoord descent = desiredSize.BSize(wm) - ascent;
 819         UpdateBSize(desiredSize.BSize(wm), ascent, descent, &aTableFrame,
 820                     kidFrame);
 821       } else {
 822         cellMaxBSize = std::max(cellMaxBSize, desiredSize.BSize(wm));
 823         int32_t rowSpan = aTableFrame.GetEffectiveRowSpan(*kidFrame);
 824         if (1 == rowSpan) {
 825           SetContentBSize(cellMaxBSize);
 826         }
 827       }
 828
 829       // Place the child
 830       desiredSize.ISize(wm) = availCellISize;
 831
 832       ReflowChildFlags flags = ReflowChildFlags::Default;
 833
 834       if (kidReflowInput) {
 835         // We reflowed. Apply relative positioning in the normal way.
 836         flags = ReflowChildFlags::ApplyRelativePositioning;
 837       } else if (kidFrame->IsRelativelyOrStickyPositioned()) {
 838         // We didn't reflow.  Do the positioning part of what
 839         // MovePositionBy does internally.  (This codepath should really
 840         // be merged into the else below if we can.)
 841         nsMargin* computedOffsetProp =
 842             kidFrame->GetProperty(nsIFrame::ComputedOffsetProperty());
 843
 844         // On our fist reflow sticky children may not have the property yet (we
 845         // need to reflow the children first to size the scroll frame).
 846         LogicalMargin computedOffsets(
 847             wm, computedOffsetProp ? *computedOffsetProp : nsMargin());
 848         ReflowInput::ApplyRelativePositioning(kidFrame, wm, computedOffsets,
 849                                               &kidPosition, containerSize);
 850       }
 851
 852       // In vertical-rl mode, we are likely to have containerSize.width = 0
 853       // because ComputedWidth() was NS_UNCONSTRAINEDSIZE.
 854       // For cases where that's wrong, we will fix up the position later.
 855       FinishReflowChild(kidFrame, aPresContext, desiredSize,
 856                         kidReflowInput.ptrOr(nullptr), wm, kidPosition,
 857                         containerSize, flags);
 858
 859       nsTableFrame* tableFrame = GetTableFrame();
 860       if (tableFrame->IsBorderCollapse()) {
 861         nsTableFrame::InvalidateTableFrame(kidFrame, kidRect, kidInkOverflow,
 862                                            firstReflow);
 863       }
 864
 865       iCoord += desiredSize.ISize(wm);
 866     } else {
 867       if (iCoord != origKidNormalPosition.I(wm)) {
 868         // Invalidate the old position
 869         kidFrame->InvalidateFrameSubtree();
 870         // Move to the new position. As above, we need to account for relative
 871         // positioning.
 872         kidFrame->MovePositionBy(
 873             wm, LogicalPoint(wm, iCoord - origKidNormalPosition.I(wm), 0));
 874         nsTableFrame::RePositionViews(kidFrame);
 875         // invalidate the new position
 876         kidFrame->InvalidateFrameSubtree();
 877       }
 878       // we need to account for the cell's isize even if it isn't reflowed
 879       iCoord += kidFrame->ISize(wm);
 880
 881       if (kidFrame->GetNextInFlow()) {
 882         aStatus.Reset();
 883         aStatus.SetIncomplete();
 884       }
 885     }
 886     ConsiderChildOverflow(aDesiredSize.mOverflowAreas, kidFrame);
 887     iCoord += aTableFrame.GetColSpacing(cellColIndex);
 888   }
 889
 890   // Just set our isize to what was available.
 891   // The table will calculate the isize and not use our value.
 892   aDesiredSize.ISize(wm) = aReflowInput.AvailableISize();
 893
 894   if (aReflowInput.mFlags.mSpecialBSizeReflow) {
 895     aDesiredSize.BSize(wm) = BSize(wm);
 896   } else if (NS_UNCONSTRAINEDSIZE == aReflowInput.AvailableBSize()) {
 897     aDesiredSize.BSize(wm) = CalcBSize(aReflowInput);
 898     if (GetPrevInFlow()) {
 899       nscoord bsize = CalcBSizeFromUnpaginatedBSize(*this, wm);
 900       aDesiredSize.BSize(wm) = std::max(aDesiredSize.BSize(wm), bsize);
 901     } else {
 902       if (isPaginated && HasStyleBSize()) {
 903         // set the unpaginated bsize so next in flows can try to honor it
 904         SetUnpaginatedBSize(aDesiredSize.BSize(wm));
 905       }
 906       if (isPaginated && HasUnpaginatedBSize()) {
 907         aDesiredSize.BSize(wm) =
 908             std::max(aDesiredSize.BSize(wm), GetUnpaginatedBSize());
 909       }
 910     }
 911   } else {  // constrained bsize, paginated
 912     // Compute the bsize we should have from style (subtracting the
 913     // bsize from our prev-in-flows from the style bsize)
 914     nscoord styleBSize = CalcBSizeFromUnpaginatedBSize(*this, wm);
 915     if (styleBSize > aReflowInput.AvailableBSize()) {
 916       styleBSize = aReflowInput.AvailableBSize();
 917       aStatus.SetIncomplete();
 918     }
 919     aDesiredSize.BSize(wm) = std::max(cellMaxBSize, styleBSize);
 920   }
 921
 922   if (wm.IsVerticalRL()) {
 923     // Any children whose width was not the same as our final
 924     // aDesiredSize.BSize will have been misplaced earlier at the
 925     // FinishReflowChild stage. So fix them up now.
 926     for (nsIFrame* kidFrame : mFrames) {
 927       if (kidFrame->BSize(wm) != aDesiredSize.BSize(wm)) {
 928         kidFrame->MovePositionBy(
 929             wm,
 930             LogicalPoint(wm, 0, kidFrame->BSize(wm) - aDesiredSize.BSize(wm)));
 931         nsTableFrame::RePositionViews(kidFrame);
 932         // Do we need to InvalidateFrameSubtree() here?
 933       }
 934     }
 935   }
 936
 937   aDesiredSize.UnionOverflowAreasWithDesiredBounds();
 938   FinishAndStoreOverflow(&aDesiredSize);
 939 }
 940
 941 /** Layout the entire row.
 942  * This method stacks cells in the inline dir according to HTML 4.0 rules.
 943  */
 944 void nsTableRowFrame::Reflow(nsPresContext* aPresContext,
 945                              ReflowOutput& aDesiredSize,
 946                              const ReflowInput& aReflowInput,
 947                              nsReflowStatus& aStatus) {
 948   MarkInReflow();
 949   DO_GLOBAL_REFLOW_COUNT("nsTableRowFrame");
 950   MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
 951
 952   WritingMode wm = aReflowInput.GetWritingMode();
 953
 954   nsTableFrame* tableFrame = GetTableFrame();
 955   const nsStyleVisibility* rowVis = StyleVisibility();
 956   bool collapseRow = StyleVisibility::Collapse == rowVis->mVisible;
 957   if (collapseRow) {
 958     tableFrame->SetNeedToCollapse(true);
 959   }
 960
 961   // see if a special bsize reflow needs to occur due to having a pct bsize
 962   nsTableFrame::CheckRequestSpecialBSizeReflow(aReflowInput);
 963
 964   // See if we have a cell with specified/pct bsize
 965   InitHasCellWithStyleBSize(tableFrame);
 966
 967   ReflowChildren(aPresContext, aDesiredSize, aReflowInput, *tableFrame,
 968                  aStatus);
 969
 970   if (aPresContext->IsPaginated() && !aStatus.IsFullyComplete() &&
 971       ShouldAvoidBreakInside(aReflowInput)) {
 972     aStatus.SetInlineLineBreakBeforeAndReset();
 973   }
 974
 975   // Just set our isize to what was available.
 976   // The table will calculate the isize and not use our value.
 977   aDesiredSize.ISize(wm) = aReflowInput.AvailableISize();
 978
 979   // If our parent is in initial reflow, it'll handle invalidating our
 980   // entire overflow rect.
 981   if (!GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW) &&
 982       nsSize(aDesiredSize.Width(), aDesiredSize.Height()) != mRect.Size()) {
 983     InvalidateFrame();
 984   }
 985
 986   // Any absolutely-positioned children will get reflowed in
 987   // nsIFrame::FixupPositionedTableParts in another pass, so propagate our
 988   // dirtiness to them before our parent clears our dirty bits.
 989   PushDirtyBitToAbsoluteFrames();
 990 }
 991
 992 nscoord nsTableRowFrame::ReflowCellFrame(nsPresContext* aPresContext,
 993                                          const ReflowInput& aReflowInput,
 994                                          bool aIsTopOfPage,
 995                                          nsTableCellFrame* aCellFrame,
 996                                          nscoord aAvailableBSize,
 997                                          nsReflowStatus& aStatus) {
 998   MOZ_ASSERT(aPresContext->IsPaginated(),
 999              "ReflowCellFrame currently supports only paged media!");
1000   MOZ_ASSERT(aAvailableBSize != NS_UNCONSTRAINEDSIZE,
1001              "Why split cell frame if available bsize is unconstrained?");
1002   WritingMode wm = aReflowInput.GetWritingMode();
1003
1004   // Reflow the cell frame with the specified height. Use the existing width
1005   nsSize containerSize = aCellFrame->GetSize();
1006   LogicalRect cellRect = aCellFrame->GetLogicalRect(wm, containerSize);
1007   nsRect cellInkOverflow = aCellFrame->InkOverflowRect();
1008
1009   LogicalSize cellSize = cellRect.Size(wm);
1010   LogicalSize availSize(wm, cellRect.ISize(wm), aAvailableBSize);
1011   bool borderCollapse = GetTableFrame()->IsBorderCollapse();
1012   NS_ASSERTION(aCellFrame->GetWritingMode() == wm,
1013                "expected consistent writing-mode within table");
1014   TableCellReflowInput cellReflowInput(aPresContext, aReflowInput, aCellFrame,
1015                                        availSize,
1016                                        ReflowInput::InitFlag::CallerWillInit);
1017   InitChildReflowInput(*aPresContext, availSize, borderCollapse,
1018                        cellReflowInput);
1019   cellReflowInput.mFlags.mIsTopOfPage = aIsTopOfPage;
1020
1021   ReflowOutput desiredSize(aReflowInput);
1022
1023   ReflowChild(aCellFrame, aPresContext, desiredSize, cellReflowInput, 0, 0,
1024               ReflowChildFlags::NoMoveFrame, aStatus);
1025   const bool isTruncated =
1026       aAvailableBSize < desiredSize.BSize(wm) &&
1027       !aIsTopOfPage;  // XXX Is !aIsTopOfPage check really necessary?
1028   const bool isCompleteAndNotTruncated = aStatus.IsComplete() && !isTruncated;
1029   if (isCompleteAndNotTruncated) {
1030     desiredSize.BSize(wm) = aAvailableBSize;
1031   }
1032   aCellFrame->SetSize(
1033       wm, LogicalSize(wm, cellSize.ISize(wm), desiredSize.BSize(wm)));
1034
1035   // Note: BlockDirAlignChild can affect the overflow rect.
1036   // XXX What happens if this cell has 'vertical-align: baseline' ?
1037   // XXX Why is it assumed that the cell's ascent hasn't changed ?
1038   if (isCompleteAndNotTruncated) {
1039     aCellFrame->BlockDirAlignChild(wm, mMaxCellAscent,
1040                                    ForceAlignTopForTableCell::Yes);
1041   }
1042
1043   nsTableFrame::InvalidateTableFrame(
1044       aCellFrame, cellRect.GetPhysicalRect(wm, containerSize), cellInkOverflow,
1045       aCellFrame->HasAnyStateBits(NS_FRAME_FIRST_REFLOW));
1046
1047   aCellFrame->DidReflow(aPresContext, nullptr);
1048
1049   return desiredSize.BSize(wm);
1050 }
1051
1052 nscoord nsTableRowFrame::CollapseRowIfNecessary(nscoord aRowOffset,
1053                                                 nscoord aISize,
1054                                                 bool aCollapseGroup,
1055                                                 bool& aDidCollapse) {
1056   const nsStyleVisibility* rowVis = StyleVisibility();
1057   bool collapseRow = StyleVisibility::Collapse == rowVis->mVisible;
1058   nsTableFrame* tableFrame =
1059       static_cast<nsTableFrame*>(GetTableFrame()->FirstInFlow());
1060   if (collapseRow) {
1061     tableFrame->SetNeedToCollapse(true);
1062   }
1063
1064   if (aRowOffset != 0) {
1065     // We're moving, so invalidate our old position
1066     InvalidateFrameSubtree();
1067   }
1068
1069   WritingMode wm = GetWritingMode();
1070
1071   nsSize parentSize = GetParent()->GetSize();
1072   LogicalRect rowRect = GetLogicalRect(wm, parentSize);
1073   nsRect oldRect = mRect;
1074   nsRect oldInkOverflow = InkOverflowRect();
1075
1076   rowRect.BStart(wm) -= aRowOffset;
1077   rowRect.ISize(wm) = aISize;
1078   OverflowAreas overflow;
1079   nscoord shift = 0;
1080   nsSize containerSize = mRect.Size();
1081
1082   if (aCollapseGroup || collapseRow) {
1083     aDidCollapse = true;
1084     shift = rowRect.BSize(wm);
1085     nsTableCellFrame* cellFrame = GetFirstCell();
1086     if (cellFrame) {
1087       uint32_t rowIndex = cellFrame->RowIndex();
1088       shift += tableFrame->GetRowSpacing(rowIndex);
1089       while (cellFrame) {
1090         LogicalRect cRect = cellFrame->GetLogicalRect(wm, containerSize);
1091         // If aRowOffset != 0, there's no point in invalidating the cells, since
1092         // we've already invalidated our overflow area.  Note that we _do_ still
1093         // need to invalidate if our row is not moving, because the cell might
1094         // span out of this row, so invalidating our row rect won't do enough.
1095         if (aRowOffset == 0) {
1096           InvalidateFrame();
1097         }
1098         cRect.BSize(wm) = 0;
1099         cellFrame->SetRect(wm, cRect, containerSize);
1100         cellFrame = cellFrame->GetNextCell();
1101       }
1102     } else {
1103       shift += tableFrame->GetRowSpacing(GetRowIndex());
1104     }
1105     rowRect.BSize(wm) = 0;
1106   } else {  // row is not collapsed
1107     // remember the col index of the previous cell to handle rowspans into this
1108     // row
1109     int32_t prevColIndex = -1;
1110     nscoord iPos = 0;  // running total of children inline-axis offset
1111     nsTableFrame* fifTable =
1112         static_cast<nsTableFrame*>(tableFrame->FirstInFlow());
1113
1114     for (nsTableCellFrame* cellFrame = GetFirstCell(); cellFrame;
1115          cellFrame = cellFrame->GetNextCell()) {
1116       uint32_t cellColIndex = cellFrame->ColIndex();
1117       int32_t cellColSpan = tableFrame->GetEffectiveColSpan(*cellFrame);
1118
1119       // If the adjacent cell is in a prior row (because of a rowspan) add in
1120       // the space
1121       // NOTE: prevColIndex can be -1 here.
1122       if (prevColIndex != (static_cast<int32_t>(cellColIndex) - 1)) {
1123         iPos += GetSpaceBetween(prevColIndex, cellColIndex, cellColSpan,
1124                                 *tableFrame, true);
1125       }
1126       LogicalRect cRect(wm, iPos, 0, 0, rowRect.BSize(wm));
1127
1128       // remember the last (iend-wards-most) column this cell spans into
1129       prevColIndex = cellColIndex + cellColSpan - 1;
1130       int32_t actualColSpan = cellColSpan;
1131       bool isVisible = false;
1132       for (int32_t colIdx = cellColIndex; actualColSpan > 0;
1133            colIdx++, actualColSpan--) {
1134         nsTableColFrame* colFrame = tableFrame->GetColFrame(colIdx);
1135         const nsStyleVisibility* colVis = colFrame->StyleVisibility();
1136         bool collapseCol = StyleVisibility::Collapse == colVis->mVisible;
1137         nsIFrame* cgFrame = colFrame->GetParent();
1138         const nsStyleVisibility* groupVis = cgFrame->StyleVisibility();
1139         bool collapseGroup = StyleVisibility::Collapse == groupVis->mVisible;
1140         bool isCollapsed = collapseCol || collapseGroup;
1141         if (!isCollapsed) {
1142           cRect.ISize(wm) += fifTable->GetColumnISizeFromFirstInFlow(colIdx);
1143           isVisible = true;
1144           if ((actualColSpan > 1)) {
1145             nsTableColFrame* nextColFrame = tableFrame->GetColFrame(colIdx + 1);
1146             const nsStyleVisibility* nextColVis =
1147                 nextColFrame->StyleVisibility();
1148             if (StyleVisibility::Collapse != nextColVis->mVisible &&
1149                 tableFrame->ColumnHasCellSpacingBefore(colIdx + 1)) {
1150               cRect.ISize(wm) += tableFrame->GetColSpacing(cellColIndex);
1151             }
1152           }
1153         }
1154       }
1155       iPos += cRect.ISize(wm);
1156       if (isVisible) {
1157         iPos += tableFrame->GetColSpacing(cellColIndex);
1158       }
1159       int32_t actualRowSpan = tableFrame->GetEffectiveRowSpan(*cellFrame);
1160       nsTableRowFrame* rowFrame = GetNextRow();
1161       for (actualRowSpan--; actualRowSpan > 0 && rowFrame; actualRowSpan--) {
1162         const nsStyleVisibility* nextRowVis = rowFrame->StyleVisibility();
1163         bool collapseNextRow =
1164             StyleVisibility::Collapse == nextRowVis->mVisible;
1165         if (!collapseNextRow) {
1166           LogicalRect nextRect = rowFrame->GetLogicalRect(wm, containerSize);
1167           cRect.BSize(wm) += nextRect.BSize(wm) +
1168                              tableFrame->GetRowSpacing(rowFrame->GetRowIndex());
1169         }
1170         rowFrame = rowFrame->GetNextRow();
1171       }
1172
1173       nsRect oldCellRect = cellFrame->GetRect();
1174       LogicalPoint oldCellNormalPos =
1175           cellFrame->GetLogicalNormalPosition(wm, containerSize);
1176
1177       nsRect oldCellInkOverflow = cellFrame->InkOverflowRect();
1178
1179       if (aRowOffset == 0 && cRect.Origin(wm) != oldCellNormalPos) {
1180         // We're moving the cell.  Invalidate the old overflow area
1181         cellFrame->InvalidateFrameSubtree();
1182       }
1183
1184       cellFrame->MovePositionBy(wm, cRect.Origin(wm) - oldCellNormalPos);
1185       cellFrame->SetSize(wm, cRect.Size(wm));
1186
1187       // XXXbz This looks completely bogus in the cases when we didn't
1188       // collapse the cell!
1189       LogicalRect cellBounds(wm, 0, 0, cRect.ISize(wm), cRect.BSize(wm));
1190       nsRect cellPhysicalBounds = cellBounds.GetPhysicalRect(wm, containerSize);
1191       OverflowAreas cellOverflow(cellPhysicalBounds, cellPhysicalBounds);
1192       cellFrame->FinishAndStoreOverflow(cellOverflow,
1193                                         cRect.Size(wm).GetPhysicalSize(wm));
1194       nsTableFrame::RePositionViews(cellFrame);
1195       ConsiderChildOverflow(overflow, cellFrame);
1196
1197       if (aRowOffset == 0) {
1198         nsTableFrame::InvalidateTableFrame(cellFrame, oldCellRect,
1199                                            oldCellInkOverflow, false);
1200       }
1201     }
1202   }
1203
1204   SetRect(wm, rowRect, containerSize);
1205   overflow.UnionAllWith(nsRect(0, 0, rowRect.Width(wm), rowRect.Height(wm)));
1206   FinishAndStoreOverflow(overflow, rowRect.Size(wm).GetPhysicalSize(wm));
1207
1208   nsTableFrame::RePositionViews(this);
1209   nsTableFrame::InvalidateTableFrame(this, oldRect, oldInkOverflow, false);
1210   return shift;
1211 }
1212
1213 /*
1214  * The following method is called by the row group frame's SplitRowGroup()
1215  * when it creates a continuing cell frame and wants to insert it into the
1216  * row's child list.
1217  */
1218 void nsTableRowFrame::InsertCellFrame(nsTableCellFrame* aFrame,
1219                                       int32_t aColIndex) {
1220   // Find the cell frame where col index < aColIndex
1221   nsTableCellFrame* priorCell = nullptr;
1222
1223   for (nsTableCellFrame* cellFrame = GetFirstCell(); cellFrame;
1224        cellFrame = cellFrame->GetNextCell()) {
1225     uint32_t colIndex = cellFrame->ColIndex();
1226     // Can aColIndex be -1 here?  Let's assume it can for now.
1227     if (static_cast<int32_t>(colIndex) < aColIndex) {
1228       priorCell = cellFrame;
1229     } else {
1230       break;
1231     }
1232   }
1233   mFrames.InsertFrame(this, priorCell, aFrame);
1234 }
1235
1236 nsTableRowFrame* nsTableRowFrame::GetPrevRow() const {
1237   nsIFrame* prevSibling = GetPrevSibling();
1238   MOZ_ASSERT(
1239       !prevSibling || static_cast<nsTableRowFrame*>(do_QueryFrame(prevSibling)),
1240       "How do we have a non-row sibling?");
1241   return static_cast<nsTableRowFrame*>(prevSibling);
1242 }
1243
1244 nsTableRowFrame* nsTableRowFrame::GetNextRow() const {
1245   nsIFrame* nextSibling = GetNextSibling();
1246   MOZ_ASSERT(
1247       !nextSibling || static_cast<nsTableRowFrame*>(do_QueryFrame(nextSibling)),
1248       "How do we have a non-row sibling?");
1249   return static_cast<nsTableRowFrame*>(nextSibling);
1250 }
1251
1252 // This property is only set on the first-in-flow of nsTableRowFrame.
1253 NS_DECLARE_FRAME_PROPERTY_SMALL_VALUE(TableRowUnpaginatedBSizeProperty, nscoord)
1254
1255 void nsTableRowFrame::SetUnpaginatedBSize(nscoord aValue) {
1256   MOZ_ASSERT(!GetPrevInFlow(),
1257              "TableRowUnpaginatedBSizeProperty should only be set on the "
1258              "first-in-flow!");
1259   AddStateBits(NS_TABLE_ROW_HAS_UNPAGINATED_BSIZE);
1260   SetProperty(TableRowUnpaginatedBSizeProperty(), aValue);
1261 }
1262
1263 nscoord nsTableRowFrame::GetUnpaginatedBSize() const {
1264   return GetProperty(TableRowUnpaginatedBSizeProperty());
1265 }
1266
1267 #ifdef ACCESSIBILITY
1268 a11y::AccType nsTableRowFrame::AccessibleType() {
1269   return a11y::eHTMLTableRowType;
1270 }
1271 #endif
1272 /**
1273  * Sets the NS_ROW_HAS_CELL_WITH_STYLE_BSIZE bit to indicate whether
1274  * this row has any cells that have non-auto-bsize.  (Row-spanning
1275  * cells are ignored.)
1276  */
1277 void nsTableRowFrame::InitHasCellWithStyleBSize(nsTableFrame* aTableFrame) {
1278   WritingMode wm = GetWritingMode();
1279
1280   for (nsTableCellFrame* cellFrame = GetFirstCell(); cellFrame;
1281        cellFrame = cellFrame->GetNextCell()) {
1282     // Ignore row-spanning cells
1283     const auto& cellBSize = cellFrame->StylePosition()->BSize(wm);
1284     if (aTableFrame->GetEffectiveRowSpan(*cellFrame) == 1 &&
1285         !cellBSize.IsAuto() &&
1286         /* calc() with both percentages and lengths treated like 'auto' */
1287         (cellBSize.ConvertsToLength() || cellBSize.ConvertsToPercentage())) {
1288       AddStateBits(NS_ROW_HAS_CELL_WITH_STYLE_BSIZE);
1289       return;
1290     }
1291   }
1292   RemoveStateBits(NS_ROW_HAS_CELL_WITH_STYLE_BSIZE);
1293 }
1294
1295 void nsTableRowFrame::InvalidateFrame(uint32_t aDisplayItemKey,
1296                                       bool aRebuildDisplayItems) {
1297   nsIFrame::InvalidateFrame(aDisplayItemKey, aRebuildDisplayItems);
1298   if (GetTableFrame()->IsBorderCollapse()) {
1299     const bool rebuild = StaticPrefs::layout_display_list_retain_sc();
1300     GetParent()->InvalidateFrameWithRect(InkOverflowRect() + GetPosition(),
1301                                          aDisplayItemKey, rebuild);
1302   }
1303 }
1304
1305 void nsTableRowFrame::InvalidateFrameWithRect(const nsRect& aRect,
1306                                               uint32_t aDisplayItemKey,
1307                                               bool aRebuildDisplayItems) {
1308   nsIFrame::InvalidateFrameWithRect(aRect, aDisplayItemKey,
1309                                     aRebuildDisplayItems);
1310   // If we have filters applied that would affects our bounds, then
1311   // we get an inactive layer created and this is computed
1312   // within FrameLayerBuilder
1313   GetParent()->InvalidateFrameWithRect(aRect + GetPosition(), aDisplayItemKey,
1314                                        aRebuildDisplayItems);
1315 }
1316
1317 /* ----- global methods ----- */
1318
1319 nsTableRowFrame* NS_NewTableRowFrame(PresShell* aPresShell,
1320                                      ComputedStyle* aStyle) {
1321   return new (aPresShell) nsTableRowFrame(aStyle, aPresShell->GetPresContext());
1322 }
1323
1324 NS_IMPL_FRAMEARENA_HELPERS(nsTableRowFrame)
1325
1326 #ifdef DEBUG_FRAME_DUMP
1327 nsresult nsTableRowFrame::GetFrameName(nsAString& aResult) const {
1328   return MakeFrameName(u"TableRow"_ns, aResult);
1329 }
1330 #endif