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gecko-dev/layout/tables/nsTableRowGroupFrame.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "nsTableRowGroupFrame.h"
#include "mozilla/ComputedStyle.h"
#include "mozilla/PresShell.h"
#include "nsCOMPtr.h"
#include "nsTableRowFrame.h"
#include "nsTableFrame.h"
#include "nsTableCellFrame.h"
#include "nsPresContext.h"
#include "nsStyleConsts.h"
#include "nsIContent.h"
#include "nsIFrame.h"
#include "nsIFrameInlines.h"
#include "nsGkAtoms.h"
#include "nsCSSRendering.h"
#include "nsHTMLParts.h"
#include "nsCSSFrameConstructor.h"
#include "nsDisplayList.h"
#include "nsCellMap.h" //table cell navigation
#include <algorithm>
using namespace mozilla;
using namespace mozilla::layout;
namespace mozilla {
struct TableRowGroupReflowInput {
const ReflowInput& reflowInput; // Our reflow input
nsTableFrame* tableFrame;
// The available size (computed from the parent)
mozilla::LogicalSize availSize;
// Running block-offset
nscoord bCoord;
TableRowGroupReflowInput(const ReflowInput& aReflowInput,
nsTableFrame* aTableFrame)
: reflowInput(aReflowInput),
tableFrame(aTableFrame),
availSize(aReflowInput.AvailableSize()),
bCoord(0) {}
~TableRowGroupReflowInput() = default;
};
} // namespace mozilla
nsTableRowGroupFrame::nsTableRowGroupFrame(ComputedStyle* aStyle,
nsPresContext* aPresContext)
: nsContainerFrame(aStyle, aPresContext, kClassID) {
SetRepeatable(false);
}
nsTableRowGroupFrame::~nsTableRowGroupFrame() = default;
void nsTableRowGroupFrame::DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) {
if (HasAnyStateBits(NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN)) {
nsTableFrame::UnregisterPositionedTablePart(this, aDestructRoot);
}
nsContainerFrame::DestroyFrom(aDestructRoot, aPostDestroyData);
}
NS_QUERYFRAME_HEAD(nsTableRowGroupFrame)
NS_QUERYFRAME_ENTRY(nsTableRowGroupFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
int32_t nsTableRowGroupFrame::GetRowCount() const {
#ifdef DEBUG
for (nsFrameList::Enumerator e(mFrames); !e.AtEnd(); e.Next()) {
NS_ASSERTION(
e.get()->StyleDisplay()->mDisplay == mozilla::StyleDisplay::TableRow,
"Unexpected display");
NS_ASSERTION(e.get()->IsTableRowFrame(), "Unexpected frame type");
}
#endif
return mFrames.GetLength();
}
int32_t nsTableRowGroupFrame::GetStartRowIndex() const {
int32_t result = -1;
if (mFrames.NotEmpty()) {
NS_ASSERTION(mFrames.FirstChild()->IsTableRowFrame(),
"Unexpected frame type");
result = static_cast<nsTableRowFrame*>(mFrames.FirstChild())->GetRowIndex();
}
// if the row group doesn't have any children, get it the hard way
if (-1 == result) {
return GetTableFrame()->GetStartRowIndex(this);
}
return result;
}
void nsTableRowGroupFrame::AdjustRowIndices(int32_t aRowIndex,
int32_t anAdjustment) {
for (nsIFrame* rowFrame : mFrames) {
if (mozilla::StyleDisplay::TableRow == rowFrame->StyleDisplay()->mDisplay) {
int32_t index = ((nsTableRowFrame*)rowFrame)->GetRowIndex();
if (index >= aRowIndex)
((nsTableRowFrame*)rowFrame)->SetRowIndex(index + anAdjustment);
}
}
}
int32_t nsTableRowGroupFrame::GetAdjustmentForStoredIndex(
int32_t aStoredIndex) {
nsTableFrame* tableFrame = GetTableFrame();
return tableFrame->GetAdjustmentForStoredIndex(aStoredIndex);
}
void nsTableRowGroupFrame::MarkRowsAsDeleted(nsTableRowFrame& aStartRowFrame,
int32_t aNumRowsToDelete) {
nsTableRowFrame* currentRowFrame = &aStartRowFrame;
for (;;) {
// XXXneerja - Instead of calling AddDeletedRowIndex() per row frame
// it is possible to change AddDeleteRowIndex to instead take
// <start row index> and <num of rows to mark for deletion> as arguments.
// The problem that emerges here is mDeletedRowIndexRanges only stores
// disjoint index ranges and since AddDeletedRowIndex() must operate on
// the "stored" index, in some cases it is possible that the range
// of indices to delete becomes overlapping EG: Deleting rows 9 - 11 and
// then from the remaining rows deleting the *new* rows 7 to 20.
// Handling these overlapping ranges is much more complicated to
// implement and so I opted to add the deleted row index of one row at a
// time and maintain the invariant that the range of deleted row indices
// is always disjoint.
currentRowFrame->AddDeletedRowIndex();
if (--aNumRowsToDelete == 0) {
break;
}
currentRowFrame = do_QueryFrame(currentRowFrame->GetNextSibling());
if (!currentRowFrame) {
MOZ_ASSERT_UNREACHABLE("expected another row frame");
break;
}
}
}
void nsTableRowGroupFrame::AddDeletedRowIndex(int32_t aDeletedRowStoredIndex) {
nsTableFrame* tableFrame = GetTableFrame();
return tableFrame->AddDeletedRowIndex(aDeletedRowStoredIndex);
}
nsresult nsTableRowGroupFrame::InitRepeatedFrame(
nsTableRowGroupFrame* aHeaderFooterFrame) {
nsTableRowFrame* copyRowFrame = GetFirstRow();
nsTableRowFrame* originalRowFrame = aHeaderFooterFrame->GetFirstRow();
AddStateBits(NS_REPEATED_ROW_OR_ROWGROUP);
while (copyRowFrame && originalRowFrame) {
copyRowFrame->AddStateBits(NS_REPEATED_ROW_OR_ROWGROUP);
int rowIndex = originalRowFrame->GetRowIndex();
copyRowFrame->SetRowIndex(rowIndex);
// For each table cell frame set its column index
nsTableCellFrame* originalCellFrame = originalRowFrame->GetFirstCell();
nsTableCellFrame* copyCellFrame = copyRowFrame->GetFirstCell();
while (copyCellFrame && originalCellFrame) {
NS_ASSERTION(
originalCellFrame->GetContent() == copyCellFrame->GetContent(),
"cell frames have different content");
uint32_t colIndex = originalCellFrame->ColIndex();
copyCellFrame->SetColIndex(colIndex);
// Move to the next cell frame
copyCellFrame = copyCellFrame->GetNextCell();
originalCellFrame = originalCellFrame->GetNextCell();
}
// Move to the next row frame
originalRowFrame = originalRowFrame->GetNextRow();
copyRowFrame = copyRowFrame->GetNextRow();
}
return NS_OK;
}
// Handle the child-traversal part of DisplayGenericTablePart
static void DisplayRows(nsDisplayListBuilder* aBuilder, nsFrame* aFrame,
const nsDisplayListSet& aLists) {
nscoord overflowAbove;
nsTableRowGroupFrame* f = static_cast<nsTableRowGroupFrame*>(aFrame);
// Don't try to use the row cursor if we have to descend into placeholders;
// we might have rows containing placeholders, where the row's overflow
// area doesn't intersect the dirty rect but we need to descend into the row
// to see out of flows.
// Note that we really want to check ShouldDescendIntoFrame for all
// the rows in |f|, but that's exactly what we're trying to avoid, so we
// approximate it by checking it for |f|: if it's true for any row
// in |f| then it's true for |f| itself.
nsIFrame* kid = aBuilder->ShouldDescendIntoFrame(f, true)
? nullptr
: f->GetFirstRowContaining(aBuilder->GetVisibleRect().y,
&overflowAbove);
if (kid) {
// have a cursor, use it
while (kid) {
if (kid->GetRect().y - overflowAbove >=
aBuilder->GetVisibleRect().YMost()) {
break;
}
f->BuildDisplayListForChild(aBuilder, kid, aLists);
kid = kid->GetNextSibling();
}
return;
}
// No cursor. Traverse children the hard way and build a cursor while we're at
// it
nsTableRowGroupFrame::FrameCursorData* cursor = f->SetupRowCursor();
kid = f->PrincipalChildList().FirstChild();
while (kid) {
f->BuildDisplayListForChild(aBuilder, kid, aLists);
if (cursor) {
if (!cursor->AppendFrame(kid)) {
f->ClearRowCursor();
return;
}
}
kid = kid->GetNextSibling();
}
if (cursor) {
cursor->FinishBuildingCursor();
}
}
void nsTableRowGroupFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) {
DisplayOutsetBoxShadow(aBuilder, aLists.BorderBackground());
for (nsTableRowFrame* row = GetFirstRow(); row; row = row->GetNextRow()) {
if (!aBuilder->GetDirtyRect().Intersects(row->GetVisualOverflowRect() +
row->GetNormalPosition())) {
continue;
}
row->PaintCellBackgroundsForFrame(this, aBuilder, aLists,
row->GetNormalPosition());
}
DisplayInsetBoxShadow(aBuilder, aLists.BorderBackground());
DisplayOutline(aBuilder, aLists);
DisplayRows(aBuilder, this, aLists);
}
nsIFrame::LogicalSides nsTableRowGroupFrame::GetLogicalSkipSides(
const ReflowInput* aReflowInput) const {
LogicalSides skip(mWritingMode);
if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
StyleBoxDecorationBreak::Clone)) {
return skip;
}
if (nullptr != GetPrevInFlow()) {
skip |= eLogicalSideBitsBStart;
}
if (nullptr != GetNextInFlow()) {
skip |= eLogicalSideBitsBEnd;
}
return skip;
}
// Position and size aKidFrame and update our reflow input.
void nsTableRowGroupFrame::PlaceChild(
nsPresContext* aPresContext, TableRowGroupReflowInput& aReflowInput,
nsIFrame* aKidFrame, const ReflowInput& aKidReflowInput, WritingMode aWM,
const LogicalPoint& aKidPosition, const nsSize& aContainerSize,
ReflowOutput& aDesiredSize, const nsRect& aOriginalKidRect,
const nsRect& aOriginalKidVisualOverflow) {
bool isFirstReflow = aKidFrame->HasAnyStateBits(NS_FRAME_FIRST_REFLOW);
// Place and size the child
FinishReflowChild(aKidFrame, aPresContext, aDesiredSize, &aKidReflowInput,
aWM, aKidPosition, aContainerSize,
ReflowChildFlags::ApplyRelativePositioning);
nsTableFrame* tableFrame = GetTableFrame();
if (tableFrame->IsBorderCollapse()) {
nsTableFrame::InvalidateTableFrame(
aKidFrame, aOriginalKidRect, aOriginalKidVisualOverflow, isFirstReflow);
}
// Adjust the running block-offset
aReflowInput.bCoord += aDesiredSize.BSize(aWM);
// If our block-size is constrained then update the available bsize
if (NS_UNCONSTRAINEDSIZE != aReflowInput.availSize.BSize(aWM)) {
aReflowInput.availSize.BSize(aWM) -= aDesiredSize.BSize(aWM);
}
}
void nsTableRowGroupFrame::InitChildReflowInput(nsPresContext& aPresContext,
bool aBorderCollapse,
ReflowInput& aReflowInput) {
nsMargin border;
if (nsTableRowFrame* rowFrame = do_QueryFrame(aReflowInput.mFrame)) {
if (aBorderCollapse) {
WritingMode wm = GetWritingMode();
border = rowFrame->GetBCBorderWidth(wm).GetPhysicalMargin(wm);
}
}
const nsMargin padding;
aReflowInput.Init(&aPresContext, Nothing(), &border, &padding);
}
static void CacheRowBSizesForPrinting(nsPresContext* aPresContext,
nsTableRowFrame* aFirstRow,
WritingMode aWM) {
for (nsTableRowFrame* row = aFirstRow; row; row = row->GetNextRow()) {
if (!row->GetPrevInFlow()) {
row->SetHasUnpaginatedBSize(true);
row->SetUnpaginatedBSize(aPresContext, row->BSize(aWM));
}
}
}
void nsTableRowGroupFrame::ReflowChildren(
nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
TableRowGroupReflowInput& aReflowInput, nsReflowStatus& aStatus,
bool* aPageBreakBeforeEnd) {
if (aPageBreakBeforeEnd) {
*aPageBreakBeforeEnd = false;
}
WritingMode wm = aReflowInput.reflowInput.GetWritingMode();
nsTableFrame* tableFrame = GetTableFrame();
const bool borderCollapse = tableFrame->IsBorderCollapse();
// XXXldb Should we really be checking IsPaginated(),
// or should we *only* check available block-size?
// (Think about multi-column layout!)
bool isPaginated = aPresContext->IsPaginated() &&
NS_UNCONSTRAINEDSIZE != aReflowInput.availSize.BSize(wm);
bool haveRow = false;
bool reflowAllKids = aReflowInput.reflowInput.ShouldReflowAllKids() ||
tableFrame->IsGeometryDirty() ||
tableFrame->NeedToCollapse();
// in vertical-rl mode, we always need the row bsizes in order to
// get the necessary containerSize for placing our kids
bool needToCalcRowBSizes = reflowAllKids || wm.IsVerticalRL();
nsSize containerSize =
aReflowInput.reflowInput.ComputedSizeAsContainerIfConstrained();
nsIFrame* prevKidFrame = nullptr;
for (nsIFrame* kidFrame = mFrames.FirstChild(); kidFrame;
prevKidFrame = kidFrame, kidFrame = kidFrame->GetNextSibling()) {
nsTableRowFrame* rowFrame = do_QueryFrame(kidFrame);
if (!rowFrame) {
// XXXldb nsCSSFrameConstructor needs to enforce this!
MOZ_ASSERT_UNREACHABLE("yikes, a non-row child");
continue;
}
nscoord cellSpacingB = tableFrame->GetRowSpacing(rowFrame->GetRowIndex());
haveRow = true;
// Reflow the row frame
if (reflowAllKids || NS_SUBTREE_DIRTY(kidFrame) ||
(aReflowInput.reflowInput.mFlags.mSpecialBSizeReflow &&
(isPaginated ||
kidFrame->HasAnyStateBits(NS_FRAME_CONTAINS_RELATIVE_BSIZE)))) {
LogicalRect oldKidRect = kidFrame->GetLogicalRect(wm, containerSize);
nsRect oldKidVisualOverflow = kidFrame->GetVisualOverflowRect();
ReflowOutput desiredSize(aReflowInput.reflowInput);
desiredSize.ClearSize();
// Reflow the child into the available space, giving it as much bsize as
// it wants. We'll deal with splitting later after we've computed the row
// bsizes, taking into account cells with row spans...
LogicalSize kidAvailSize = aReflowInput.availSize;
kidAvailSize.BSize(wm) = NS_UNCONSTRAINEDSIZE;
ReflowInput kidReflowInput(aPresContext, aReflowInput.reflowInput,
kidFrame, kidAvailSize, Nothing(),
ReflowInput::CALLER_WILL_INIT);
InitChildReflowInput(*aPresContext, borderCollapse, kidReflowInput);
// This can indicate that columns were resized.
if (aReflowInput.reflowInput.IsIResize()) {
kidReflowInput.SetIResize(true);
}
NS_ASSERTION(kidFrame == mFrames.FirstChild() || prevKidFrame,
"If we're not on the first frame, we should have a "
"previous sibling...");
// If prev row has nonzero YMost, then we can't be at the top of the page
if (prevKidFrame && prevKidFrame->GetNormalRect().YMost() > 0) {
kidReflowInput.mFlags.mIsTopOfPage = false;
}
LogicalPoint kidPosition(wm, 0, aReflowInput.bCoord);
ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowInput, wm,
kidPosition, containerSize, ReflowChildFlags::Default,
aStatus);
// Place the child
PlaceChild(aPresContext, aReflowInput, kidFrame, kidReflowInput, wm,
kidPosition, containerSize, desiredSize,
oldKidRect.GetPhysicalRect(wm, containerSize),
oldKidVisualOverflow);
aReflowInput.bCoord += cellSpacingB;
if (!reflowAllKids) {
if (IsSimpleRowFrame(aReflowInput.tableFrame, rowFrame)) {
// Inform the row of its new bsize.
rowFrame->DidResize();
// the overflow area may have changed inflate the overflow area
const nsStylePosition* stylePos = StylePosition();
if (aReflowInput.tableFrame->IsAutoBSize(wm) &&
!stylePos->BSize(wm).ConvertsToLength()) {
// Because other cells in the row may need to be aligned
// differently, repaint the entire row
InvalidateFrame();
} else if (oldKidRect.BSize(wm) != desiredSize.BSize(wm)) {
needToCalcRowBSizes = true;
}
} else {
needToCalcRowBSizes = true;
}
}
if (isPaginated && aPageBreakBeforeEnd && !*aPageBreakBeforeEnd) {
nsTableRowFrame* nextRow = rowFrame->GetNextRow();
if (nextRow) {
*aPageBreakBeforeEnd =
nsTableFrame::PageBreakAfter(kidFrame, nextRow);
}
}
} else {
SlideChild(aReflowInput, kidFrame);
// Adjust the running b-offset so we know where the next row should be
// placed
nscoord bSize = kidFrame->BSize(wm) + cellSpacingB;
aReflowInput.bCoord += bSize;
if (NS_UNCONSTRAINEDSIZE != aReflowInput.availSize.BSize(wm)) {
aReflowInput.availSize.BSize(wm) -= bSize;
}
}
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, kidFrame);
}
if (haveRow) {
aReflowInput.bCoord -=
tableFrame->GetRowSpacing(GetStartRowIndex() + GetRowCount());
}
// Return our desired rect
aDesiredSize.ISize(wm) = aReflowInput.reflowInput.AvailableISize();
aDesiredSize.BSize(wm) = aReflowInput.bCoord;
if (aReflowInput.reflowInput.mFlags.mSpecialBSizeReflow) {
DidResizeRows(aDesiredSize);
if (isPaginated) {
CacheRowBSizesForPrinting(aPresContext, GetFirstRow(), wm);
}
} else if (needToCalcRowBSizes) {
CalculateRowBSizes(aPresContext, aDesiredSize, aReflowInput.reflowInput);
if (!reflowAllKids) {
InvalidateFrame();
}
}
}
nsTableRowFrame* nsTableRowGroupFrame::GetFirstRow() {
for (nsIFrame* childFrame : mFrames) {
nsTableRowFrame* rowFrame = do_QueryFrame(childFrame);
if (rowFrame) {
return rowFrame;
}
}
return nullptr;
}
nsTableRowFrame* nsTableRowGroupFrame::GetLastRow() {
for (auto iter = mFrames.rbegin(), end = mFrames.rend(); iter != end;
++iter) {
nsTableRowFrame* rowFrame = do_QueryFrame(*iter);
if (rowFrame) {
return rowFrame;
}
}
return nullptr;
}
struct RowInfo {
RowInfo() { bSize = pctBSize = hasStyleBSize = hasPctBSize = isSpecial = 0; }
unsigned bSize; // content bsize or fixed bsize, excluding pct bsize
unsigned pctBSize : 29; // pct bsize
unsigned hasStyleBSize : 1;
unsigned hasPctBSize : 1;
unsigned isSpecial : 1; // there is no cell originating in the row with
// rowspan=1 and there are at least 2 cells spanning
// the row and there is no style bsize on the row
};
static void UpdateBSizes(RowInfo& aRowInfo, nscoord aAdditionalBSize,
nscoord& aTotal, nscoord& aUnconstrainedTotal) {
aRowInfo.bSize += aAdditionalBSize;
aTotal += aAdditionalBSize;
if (!aRowInfo.hasStyleBSize) {
aUnconstrainedTotal += aAdditionalBSize;
}
}
void nsTableRowGroupFrame::DidResizeRows(ReflowOutput& aDesiredSize) {
// Update the cells spanning rows with their new bsizes.
// This is the place where all of the cells in the row get set to the bsize
// of the row.
// Reset the overflow area.
aDesiredSize.mOverflowAreas.Clear();
for (nsTableRowFrame* rowFrame = GetFirstRow(); rowFrame;
rowFrame = rowFrame->GetNextRow()) {
rowFrame->DidResize();
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, rowFrame);
}
}
// This calculates the bsize of all the rows and takes into account
// style bsize on the row group, style bsizes on rows and cells, style bsizes on
// rowspans. Actual row bsizes will be adjusted later if the table has a style
// bsize. Even if rows don't change bsize, this method must be called to set the
// bsizes of each cell in the row to the bsize of its row.
void nsTableRowGroupFrame::CalculateRowBSizes(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput) {
nsTableFrame* tableFrame = GetTableFrame();
const bool isPaginated = aPresContext->IsPaginated();
int32_t numEffCols = tableFrame->GetEffectiveColCount();
int32_t startRowIndex = GetStartRowIndex();
// find the row corresponding to the row index we just found
nsTableRowFrame* startRowFrame = GetFirstRow();
if (!startRowFrame) {
return;
}
// The current row group block-size is the block-origin of the 1st row
// we are about to calculate a block-size for.
WritingMode wm = aReflowInput.GetWritingMode();
nsSize containerSize; // actual value is unimportant as we're initially
// computing sizes, not physical positions
nscoord startRowGroupBSize =
startRowFrame->GetLogicalNormalPosition(wm, containerSize).B(wm);
int32_t numRows =
GetRowCount() - (startRowFrame->GetRowIndex() - GetStartRowIndex());
// Collect the current bsize of each row.
if (numRows <= 0) return;
AutoTArray<RowInfo, 32> rowInfo;
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier.
rowInfo.AppendElements(numRows);
bool hasRowSpanningCell = false;
nscoord bSizeOfRows = 0;
nscoord bSizeOfUnStyledRows = 0;
// Get the bsize of each row without considering rowspans. This will be the
// max of the largest desired bsize of each cell, the largest style bsize of
// each cell, the style bsize of the row.
nscoord pctBSizeBasis = GetBSizeBasis(aReflowInput);
int32_t
rowIndex; // the index in rowInfo, not among the rows in the row group
nsTableRowFrame* rowFrame;
for (rowFrame = startRowFrame, rowIndex = 0; rowFrame;
rowFrame = rowFrame->GetNextRow(), rowIndex++) {
nscoord nonPctBSize = rowFrame->GetContentBSize();
if (isPaginated) {
nonPctBSize = std::max(nonPctBSize, rowFrame->BSize(wm));
}
if (!rowFrame->GetPrevInFlow()) {
if (rowFrame->HasPctBSize()) {
rowInfo[rowIndex].hasPctBSize = true;
rowInfo[rowIndex].pctBSize = rowFrame->GetInitialBSize(pctBSizeBasis);
}
rowInfo[rowIndex].hasStyleBSize = rowFrame->HasStyleBSize();
nonPctBSize = std::max(nonPctBSize, rowFrame->GetFixedBSize());
}
UpdateBSizes(rowInfo[rowIndex], nonPctBSize, bSizeOfRows,
bSizeOfUnStyledRows);
if (!rowInfo[rowIndex].hasStyleBSize) {
if (isPaginated ||
tableFrame->HasMoreThanOneCell(rowIndex + startRowIndex)) {
rowInfo[rowIndex].isSpecial = true;
// iteratate the row's cell frames to see if any do not have rowspan > 1
nsTableCellFrame* cellFrame = rowFrame->GetFirstCell();
while (cellFrame) {
int32_t rowSpan = tableFrame->GetEffectiveRowSpan(
rowIndex + startRowIndex, *cellFrame);
if (1 == rowSpan) {
rowInfo[rowIndex].isSpecial = false;
break;
}
cellFrame = cellFrame->GetNextCell();
}
}
}
// See if a cell spans into the row. If so we'll have to do the next step
if (!hasRowSpanningCell) {
if (tableFrame->RowIsSpannedInto(rowIndex + startRowIndex, numEffCols)) {
hasRowSpanningCell = true;
}
}
}
if (hasRowSpanningCell) {
// Get the bsize of cells with rowspans and allocate any extra space to the
// rows they span iteratate the child frames and process the row frames
// among them
for (rowFrame = startRowFrame, rowIndex = 0; rowFrame;
rowFrame = rowFrame->GetNextRow(), rowIndex++) {
// See if the row has an originating cell with rowspan > 1. We cannot
// determine this for a row in a continued row group by calling
// RowHasSpanningCells, because the row's fif may not have any originating
// cells yet the row may have a continued cell which originates in it.
if (GetPrevInFlow() || tableFrame->RowHasSpanningCells(
startRowIndex + rowIndex, numEffCols)) {
nsTableCellFrame* cellFrame = rowFrame->GetFirstCell();
// iteratate the row's cell frames
while (cellFrame) {
nscoord cellSpacingB =
tableFrame->GetRowSpacing(startRowIndex + rowIndex);
int32_t rowSpan = tableFrame->GetEffectiveRowSpan(
rowIndex + startRowIndex, *cellFrame);
if ((rowIndex + rowSpan) > numRows) {
// there might be rows pushed already to the nextInFlow
rowSpan = numRows - rowIndex;
}
if (rowSpan > 1) { // a cell with rowspan > 1, determine the bsize of
// the rows it spans
nscoord bsizeOfRowsSpanned = 0;
nscoord bsizeOfUnStyledRowsSpanned = 0;
nscoord numSpecialRowsSpanned = 0;
nscoord cellSpacingTotal = 0;
int32_t spanX;
for (spanX = 0; spanX < rowSpan; spanX++) {
bsizeOfRowsSpanned += rowInfo[rowIndex + spanX].bSize;
if (!rowInfo[rowIndex + spanX].hasStyleBSize) {
bsizeOfUnStyledRowsSpanned += rowInfo[rowIndex + spanX].bSize;
}
if (0 != spanX) {
cellSpacingTotal += cellSpacingB;
}
if (rowInfo[rowIndex + spanX].isSpecial) {
numSpecialRowsSpanned++;
}
}
nscoord bsizeOfAreaSpanned = bsizeOfRowsSpanned + cellSpacingTotal;
// get the bsize of the cell
LogicalSize cellFrameSize = cellFrame->GetLogicalSize(wm);
LogicalSize cellDesSize = cellFrame->GetDesiredSize();
rowFrame->CalculateCellActualBSize(cellFrame, cellDesSize.BSize(wm),
wm);
cellFrameSize.BSize(wm) = cellDesSize.BSize(wm);
if (cellFrame->HasVerticalAlignBaseline()) {
// to ensure that a spanning cell with a long descender doesn't
// collide with the next row, we need to take into account the
// shift that will be done to align the cell on the baseline of
// the row.
cellFrameSize.BSize(wm) +=
rowFrame->GetMaxCellAscent() - cellFrame->GetCellBaseline();
}
if (bsizeOfAreaSpanned < cellFrameSize.BSize(wm)) {
// the cell's bsize is larger than the available space of the rows
// it spans so distribute the excess bsize to the rows affected
nscoord extra = cellFrameSize.BSize(wm) - bsizeOfAreaSpanned;
nscoord extraUsed = 0;
if (0 == numSpecialRowsSpanned) {
// NS_ASSERTION(bsizeOfRowsSpanned > 0, "invalid row span
// situation");
bool haveUnStyledRowsSpanned = (bsizeOfUnStyledRowsSpanned > 0);
nscoord divisor = (haveUnStyledRowsSpanned)
? bsizeOfUnStyledRowsSpanned
: bsizeOfRowsSpanned;
if (divisor > 0) {
for (spanX = rowSpan - 1; spanX >= 0; spanX--) {
if (!haveUnStyledRowsSpanned ||
!rowInfo[rowIndex + spanX].hasStyleBSize) {
// The amount of additional space each row gets is
// proportional to its bsize
float percent = ((float)rowInfo[rowIndex + spanX].bSize) /
((float)divisor);
// give rows their percentage, except for the first row
// which gets the remainder
nscoord extraForRow =
(0 == spanX)
? extra - extraUsed
: NSToCoordRound(((float)(extra)) * percent);
extraForRow = std::min(extraForRow, extra - extraUsed);
// update the row bsize
UpdateBSizes(rowInfo[rowIndex + spanX], extraForRow,
bSizeOfRows, bSizeOfUnStyledRows);
extraUsed += extraForRow;
if (extraUsed >= extra) {
NS_ASSERTION((extraUsed == extra),
"invalid row bsize calculation");
break;
}
}
}
} else {
// put everything in the last row
UpdateBSizes(rowInfo[rowIndex + rowSpan - 1], extra,
bSizeOfRows, bSizeOfUnStyledRows);
}
} else {
// give the extra to the special rows
nscoord numSpecialRowsAllocated = 0;
for (spanX = rowSpan - 1; spanX >= 0; spanX--) {
if (rowInfo[rowIndex + spanX].isSpecial) {
// The amount of additional space each degenerate row gets
// is proportional to the number of them
float percent = 1.0f / ((float)numSpecialRowsSpanned);
// give rows their percentage, except for the first row
// which gets the remainder
nscoord extraForRow =
(numSpecialRowsSpanned - 1 == numSpecialRowsAllocated)
? extra - extraUsed
: NSToCoordRound(((float)(extra)) * percent);
extraForRow = std::min(extraForRow, extra - extraUsed);
// update the row bsize
UpdateBSizes(rowInfo[rowIndex + spanX], extraForRow,
bSizeOfRows, bSizeOfUnStyledRows);
extraUsed += extraForRow;
if (extraUsed >= extra) {
NS_ASSERTION((extraUsed == extra),
"invalid row bsize calculation");
break;
}
}
}
}
}
} // if (rowSpan > 1)
cellFrame = cellFrame->GetNextCell();
} // while (cellFrame)
} // if (tableFrame->RowHasSpanningCells(startRowIndex + rowIndex) {
} // while (rowFrame)
}
// pct bsize rows have already got their content bsizes.
// Give them their pct bsizes up to pctBSizeBasis
nscoord extra = pctBSizeBasis - bSizeOfRows;
for (rowFrame = startRowFrame, rowIndex = 0; rowFrame && (extra > 0);
rowFrame = rowFrame->GetNextRow(), rowIndex++) {
RowInfo& rInfo = rowInfo[rowIndex];
if (rInfo.hasPctBSize) {
nscoord rowExtra =
(rInfo.pctBSize > rInfo.bSize) ? rInfo.pctBSize - rInfo.bSize : 0;
rowExtra = std::min(rowExtra, extra);
UpdateBSizes(rInfo, rowExtra, bSizeOfRows, bSizeOfUnStyledRows);
extra -= rowExtra;
}
}
bool styleBSizeAllocation = false;
nscoord rowGroupBSize = startRowGroupBSize + bSizeOfRows +
tableFrame->GetRowSpacing(0, numRows - 1);
// if we have a style bsize, allocate the extra bsize to unconstrained rows
if ((aReflowInput.ComputedBSize() > rowGroupBSize) &&
(NS_UNCONSTRAINEDSIZE != aReflowInput.ComputedBSize())) {
nscoord extraComputedBSize = aReflowInput.ComputedBSize() - rowGroupBSize;
nscoord extraUsed = 0;
bool haveUnStyledRows = (bSizeOfUnStyledRows > 0);
nscoord divisor = (haveUnStyledRows) ? bSizeOfUnStyledRows : bSizeOfRows;
if (divisor > 0) {
styleBSizeAllocation = true;
for (rowIndex = 0; rowIndex < numRows; rowIndex++) {
if (!haveUnStyledRows || !rowInfo[rowIndex].hasStyleBSize) {
// The amount of additional space each row gets is based on the
// percentage of space it occupies
float percent = ((float)rowInfo[rowIndex].bSize) / ((float)divisor);
// give rows their percentage, except for the last row which gets the
// remainder
nscoord extraForRow =
(numRows - 1 == rowIndex)
? extraComputedBSize - extraUsed
: NSToCoordRound(((float)extraComputedBSize) * percent);
extraForRow = std::min(extraForRow, extraComputedBSize - extraUsed);
// update the row bsize
UpdateBSizes(rowInfo[rowIndex], extraForRow, bSizeOfRows,
bSizeOfUnStyledRows);
extraUsed += extraForRow;
if (extraUsed >= extraComputedBSize) {
NS_ASSERTION((extraUsed == extraComputedBSize),
"invalid row bsize calculation");
break;
}
}
}
}
rowGroupBSize = aReflowInput.ComputedBSize();
}
if (wm.IsVertical()) {
// we need the correct containerSize below for block positioning in
// vertical-rl writing mode
containerSize.width = rowGroupBSize;
}
nscoord bOrigin = startRowGroupBSize;
// update the rows with their (potentially) new bsizes
for (rowFrame = startRowFrame, rowIndex = 0; rowFrame;
rowFrame = rowFrame->GetNextRow(), rowIndex++) {
nsRect rowBounds = rowFrame->GetRect();
LogicalSize rowBoundsSize(wm, rowBounds.Size());
nsRect rowVisualOverflow = rowFrame->GetVisualOverflowRect();
nscoord deltaB =
bOrigin - rowFrame->GetLogicalNormalPosition(wm, containerSize).B(wm);
nscoord rowBSize =
(rowInfo[rowIndex].bSize > 0) ? rowInfo[rowIndex].bSize : 0;
if (deltaB != 0 || (rowBSize != rowBoundsSize.BSize(wm))) {
// Resize/move the row to its final size and position
if (deltaB != 0) {
rowFrame->InvalidateFrameSubtree();
}
rowFrame->MovePositionBy(wm, LogicalPoint(wm, 0, deltaB));
rowFrame->SetSize(LogicalSize(wm, rowBoundsSize.ISize(wm), rowBSize));
nsTableFrame::InvalidateTableFrame(rowFrame, rowBounds, rowVisualOverflow,
false);
if (deltaB != 0) {
nsTableFrame::RePositionViews(rowFrame);
// XXXbz we don't need to update our overflow area?
}
}
bOrigin += rowBSize + tableFrame->GetRowSpacing(startRowIndex + rowIndex);
}
if (isPaginated && styleBSizeAllocation) {
// since the row group has a style bsize, cache the row bsizes,
// so next in flows can honor them
CacheRowBSizesForPrinting(aPresContext, GetFirstRow(), wm);
}
DidResizeRows(aDesiredSize);
aDesiredSize.BSize(wm) = rowGroupBSize; // Adjust our desired size
}
nscoord nsTableRowGroupFrame::CollapseRowGroupIfNecessary(nscoord aBTotalOffset,
nscoord aISize,
WritingMode aWM) {
nsTableFrame* tableFrame = GetTableFrame();
nsSize containerSize = tableFrame->GetSize();
const nsStyleVisibility* groupVis = StyleVisibility();
bool collapseGroup = StyleVisibility::Collapse == groupVis->mVisible;
if (collapseGroup) {
tableFrame->SetNeedToCollapse(true);
}
nsOverflowAreas overflow;
nsTableRowFrame* rowFrame = GetFirstRow();
bool didCollapse = false;
nscoord bGroupOffset = 0;
while (rowFrame) {
bGroupOffset += rowFrame->CollapseRowIfNecessary(
bGroupOffset, aISize, collapseGroup, didCollapse);
ConsiderChildOverflow(overflow, rowFrame);
rowFrame = rowFrame->GetNextRow();
}
LogicalRect groupRect = GetLogicalRect(aWM, containerSize);
nsRect oldGroupRect = GetRect();
nsRect oldGroupVisualOverflow = GetVisualOverflowRect();
groupRect.BSize(aWM) -= bGroupOffset;
if (didCollapse) {
// add back the cellspacing between rowgroups
groupRect.BSize(aWM) +=
tableFrame->GetRowSpacing(GetStartRowIndex() + GetRowCount());
}
groupRect.BStart(aWM) -= aBTotalOffset;
groupRect.ISize(aWM) = aISize;
if (aBTotalOffset != 0) {
InvalidateFrameSubtree();
}
SetRect(aWM, groupRect, containerSize);
overflow.UnionAllWith(
nsRect(0, 0, groupRect.Width(aWM), groupRect.Height(aWM)));
FinishAndStoreOverflow(overflow, groupRect.Size(aWM).GetPhysicalSize(aWM));
nsTableFrame::RePositionViews(this);
nsTableFrame::InvalidateTableFrame(this, oldGroupRect, oldGroupVisualOverflow,
false);
return bGroupOffset;
}
// Move a child that was skipped during a reflow.
void nsTableRowGroupFrame::SlideChild(TableRowGroupReflowInput& aReflowInput,
nsIFrame* aKidFrame) {
// Move the frame if we need to.
WritingMode wm = aReflowInput.reflowInput.GetWritingMode();
const nsSize containerSize =
aReflowInput.reflowInput.ComputedSizeAsContainerIfConstrained();
LogicalPoint oldPosition =
aKidFrame->GetLogicalNormalPosition(wm, containerSize);
LogicalPoint newPosition = oldPosition;
newPosition.B(wm) = aReflowInput.bCoord;
if (oldPosition.B(wm) != newPosition.B(wm)) {
aKidFrame->InvalidateFrameSubtree();
aReflowInput.reflowInput.ApplyRelativePositioning(&newPosition,
containerSize);
aKidFrame->SetPosition(wm, newPosition, containerSize);
nsTableFrame::RePositionViews(aKidFrame);
aKidFrame->InvalidateFrameSubtree();
}
}
// Create a continuing frame, add it to the child list, and then push it
// and the frames that follow
void nsTableRowGroupFrame::CreateContinuingRowFrame(nsIFrame& aRowFrame,
nsIFrame** aContRowFrame) {
// XXX what is the row index?
if (!aContRowFrame) {
NS_ASSERTION(false, "bad call");
return;
}
// create the continuing frame which will create continuing cell frames
*aContRowFrame =
PresShell()->FrameConstructor()->CreateContinuingFrame(&aRowFrame, this);
// Add the continuing row frame to the child list
mFrames.InsertFrame(nullptr, &aRowFrame, *aContRowFrame);
// Push the continuing row frame and the frames that follow
PushChildren(*aContRowFrame, &aRowFrame);
}
// Reflow the cells with rowspan > 1 which originate between aFirstRow
// and end on or after aLastRow. aFirstTruncatedRow is the highest row on the
// page that contains a cell which cannot split on this page
void nsTableRowGroupFrame::SplitSpanningCells(
nsPresContext& aPresContext, const ReflowInput& aReflowInput,
nsTableFrame& aTable, nsTableRowFrame& aFirstRow, nsTableRowFrame& aLastRow,
bool aFirstRowIsTopOfPage, nscoord aSpanningRowBEnd,
nsTableRowFrame*& aContRow, nsTableRowFrame*& aFirstTruncatedRow,
nscoord& aDesiredBSize) {
NS_ASSERTION(aSpanningRowBEnd >= 0, "Can't split negative bsizes");
aFirstTruncatedRow = nullptr;
aDesiredBSize = 0;
const bool borderCollapse = aTable.IsBorderCollapse();
int32_t lastRowIndex = aLastRow.GetRowIndex();
bool wasLast = false;
bool haveRowSpan = false;
// Iterate the rows between aFirstRow and aLastRow
for (nsTableRowFrame* row = &aFirstRow; !wasLast; row = row->GetNextRow()) {
wasLast = (row == &aLastRow);
int32_t rowIndex = row->GetRowIndex();
nsPoint rowPos = row->GetNormalPosition();
// Iterate the cells looking for those that have rowspan > 1
for (nsTableCellFrame* cell = row->GetFirstCell(); cell;
cell = cell->GetNextCell()) {
int32_t rowSpan = aTable.GetEffectiveRowSpan(rowIndex, *cell);
// Only reflow rowspan > 1 cells which span aLastRow. Those which don't
// span aLastRow were reflowed correctly during the unconstrained bsize
// reflow.
if ((rowSpan > 1) && (rowIndex + rowSpan > lastRowIndex)) {
haveRowSpan = true;
nsReflowStatus status;
// Ask the row to reflow the cell to the bsize of all the rows it spans
// up through aLastRow cellAvailBSize is the space between the row group
// start and the end of the page
nscoord cellAvailBSize = aSpanningRowBEnd - rowPos.y;
NS_ASSERTION(cellAvailBSize >= 0, "No space for cell?");
bool isTopOfPage = (row == &aFirstRow) && aFirstRowIsTopOfPage;
nsRect rowRect = row->GetNormalRect();
nsSize rowAvailSize(
aReflowInput.AvailableWidth(),
std::max(aReflowInput.AvailableHeight() - rowRect.y, 0));
// don't let the available height exceed what
// CalculateRowBSizes set for it
rowAvailSize.height = std::min(rowAvailSize.height, rowRect.height);
ReflowInput rowReflowInput(
&aPresContext, aReflowInput, row,
LogicalSize(row->GetWritingMode(), rowAvailSize), Nothing(),
ReflowInput::CALLER_WILL_INIT);
InitChildReflowInput(aPresContext, borderCollapse, rowReflowInput);
rowReflowInput.mFlags.mIsTopOfPage = isTopOfPage; // set top of page
nscoord cellBSize =
row->ReflowCellFrame(&aPresContext, rowReflowInput, isTopOfPage,
cell, cellAvailBSize, status);
aDesiredBSize = std::max(aDesiredBSize, rowPos.y + cellBSize);
if (status.IsComplete()) {
if (cellBSize > cellAvailBSize) {
aFirstTruncatedRow = row;
if ((row != &aFirstRow) || !aFirstRowIsTopOfPage) {
// return now, since we will be getting another reflow after
// either (1) row is moved to the next page or (2) the row group
// is moved to the next page
return;
}
}
} else {
if (!aContRow) {
CreateContinuingRowFrame(aLastRow, (nsIFrame**)&aContRow);
}
if (aContRow) {
if (row != &aLastRow) {
// aContRow needs a continuation for cell, since cell spanned into
// aLastRow but does not originate there
nsTableCellFrame* contCell = static_cast<nsTableCellFrame*>(
PresShell()->FrameConstructor()->CreateContinuingFrame(
cell, &aLastRow));
uint32_t colIndex = cell->ColIndex();
aContRow->InsertCellFrame(contCell, colIndex);
}
}
}
}
}
}
if (!haveRowSpan) {
aDesiredBSize = aLastRow.GetNormalRect().YMost();
}
}
// Remove the next-in-flow of the row, its cells and their cell blocks. This
// is necessary in case the row doesn't need a continuation later on or needs
// a continuation which doesn't have the same number of cells that now exist.
void nsTableRowGroupFrame::UndoContinuedRow(nsPresContext* aPresContext,
nsTableRowFrame* aRow) {
if (!aRow) return; // allow null aRow to avoid callers doing null checks
// rowBefore was the prev-sibling of aRow's next-sibling before aRow was
// created
nsTableRowFrame* rowBefore = (nsTableRowFrame*)aRow->GetPrevInFlow();
MOZ_ASSERT(mFrames.ContainsFrame(rowBefore),
"rowBefore not in our frame list?");
AutoFrameListPtr overflows(aPresContext, StealOverflowFrames());
if (!rowBefore || !overflows || overflows->IsEmpty() ||
overflows->FirstChild() != aRow) {
NS_ERROR("invalid continued row");
return;
}
// Destroy aRow, its cells, and their cell blocks. Cell blocks that have split
// will not have reflowed yet to pick up content from any overflow lines.
overflows->DestroyFrame(aRow);
// Put the overflow rows into our child list
if (!overflows->IsEmpty()) {
mFrames.InsertFrames(nullptr, rowBefore, *overflows);
}
}
static nsTableRowFrame* GetRowBefore(nsTableRowFrame& aStartRow,
nsTableRowFrame& aRow) {
nsTableRowFrame* rowBefore = nullptr;
for (nsTableRowFrame* sib = &aStartRow; sib && (sib != &aRow);
sib = sib->GetNextRow()) {
rowBefore = sib;
}
return rowBefore;
}
nsresult nsTableRowGroupFrame::SplitRowGroup(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsTableFrame* aTableFrame,
nsReflowStatus& aStatus,
bool aRowForcedPageBreak) {
MOZ_ASSERT(aPresContext->IsPaginated(),
"SplitRowGroup currently supports only paged media");
nsTableRowFrame* prevRowFrame = nullptr;
aDesiredSize.Height() = 0;
const nscoord availWidth = aReflowInput.AvailableWidth();
const nscoord availHeight = aReflowInput.AvailableHeight();
const bool borderCollapse = aTableFrame->IsBorderCollapse();
// get the page height
nscoord pageHeight = aPresContext->GetPageSize().height;
NS_ASSERTION(pageHeight != NS_UNCONSTRAINEDSIZE,
"The table shouldn't be split when there should be space");
bool isTopOfPage = aReflowInput.mFlags.mIsTopOfPage;
nsTableRowFrame* firstRowThisPage = GetFirstRow();
// Need to dirty the table's geometry, or else the row might skip
// reflowing its cell as an optimization.
aTableFrame->SetGeometryDirty();
// Walk each of the row frames looking for the first row frame that doesn't
// fit in the available space
for (nsTableRowFrame* rowFrame = firstRowThisPage; rowFrame;
rowFrame = rowFrame->GetNextRow()) {
bool rowIsOnPage = true;
nscoord cellSpacingB = aTableFrame->GetRowSpacing(rowFrame->GetRowIndex());
nsRect rowRect = rowFrame->GetNormalRect();
// See if the row fits on this page
if (rowRect.YMost() > availHeight) {
nsTableRowFrame* contRow = nullptr;
// Reflow the row in the availabe space and have it split if it is the 1st
// row (on the page) or there is at least 5% of the current page available
// XXX this 5% should be made a preference
if (!prevRowFrame ||
(availHeight - aDesiredSize.Height() > pageHeight / 20)) {
nsSize availSize(availWidth, std::max(availHeight - rowRect.y, 0));
// don't let the available height exceed what CalculateRowHeights set
// for it
availSize.height = std::min(availSize.height, rowRect.height);
ReflowInput rowReflowInput(
aPresContext, aReflowInput, rowFrame,
LogicalSize(rowFrame->GetWritingMode(), availSize), Nothing(),
ReflowInput::CALLER_WILL_INIT);
InitChildReflowInput(*aPresContext, borderCollapse, rowReflowInput);
rowReflowInput.mFlags.mIsTopOfPage = isTopOfPage; // set top of page
ReflowOutput rowMetrics(aReflowInput);
// Get the old size before we reflow.
nsRect oldRowRect = rowFrame->GetRect();
nsRect oldRowVisualOverflow = rowFrame->GetVisualOverflowRect();
// Reflow the cell with the constrained height. A cell with rowspan >1
// will get this reflow later during SplitSpanningCells.
ReflowChild(rowFrame, aPresContext, rowMetrics, rowReflowInput, 0, 0,
ReflowChildFlags::NoMoveFrame, aStatus);
rowFrame->SetSize(nsSize(rowMetrics.Width(), rowMetrics.Height()));
rowFrame->DidReflow(aPresContext, nullptr);
rowFrame->DidResize();
if (!aRowForcedPageBreak && !aStatus.IsFullyComplete() &&
ShouldAvoidBreakInside(aReflowInput)) {
aStatus.SetInlineLineBreakBeforeAndReset();
break;
}
nsTableFrame::InvalidateTableFrame(rowFrame, oldRowRect,
oldRowVisualOverflow, false);
if (aStatus.IsIncomplete()) {
// The row frame is incomplete and all of the rowspan 1 cells' block
// frames split
if ((rowMetrics.Height() <= rowReflowInput.AvailableHeight()) ||
isTopOfPage) {
// The row stays on this page because either it split ok or we're on
// the top of page. If top of page and the height exceeded the avail
// height, then there will be data loss
NS_ASSERTION(
rowMetrics.Height() <= rowReflowInput.AvailableHeight(),
"data loss - incomplete row needed more height than available, "
"on top of page");
CreateContinuingRowFrame(*rowFrame, (nsIFrame**)&contRow);
if (contRow) {
aDesiredSize.Height() += rowMetrics.Height();
if (prevRowFrame) aDesiredSize.Height() += cellSpacingB;
} else
return NS_ERROR_NULL_POINTER;
} else {
// Put the row on the next page to give it more height
rowIsOnPage = false;
}
} else {
// The row frame is complete because either (1) its minimum height is
// greater than the available height we gave it, or (2) it may have
// been given a larger height through style than its content, or (3)
// it contains a rowspan >1 cell which hasn't been reflowed with a
// constrained height yet (we will find out when SplitSpanningCells is
// called below)
if (rowMetrics.Height() > availSize.height ||
(aStatus.IsInlineBreakBefore() && !aRowForcedPageBreak)) {
// cases (1) and (2)
if (isTopOfPage) {
// We're on top of the page, so keep the row on this page. There
// will be data loss. Push the row frame that follows
nsTableRowFrame* nextRowFrame = rowFrame->GetNextRow();
if (nextRowFrame) {
aStatus.Reset();
aStatus.SetIncomplete();
}
aDesiredSize.Height() += rowMetrics.Height();
if (prevRowFrame) aDesiredSize.Height() += cellSpacingB;
NS_WARNING(
"data loss - complete row needed more height than available, "
"on top of page");
} else {
// We're not on top of the page, so put the row on the next page
// to give it more height
rowIsOnPage = false;
}
}
}
} // if (!prevRowFrame || (availHeight - aDesiredSize.Height() >
// pageHeight / 20))
else {
// put the row on the next page to give it more height
rowIsOnPage = false;
}
nsTableRowFrame* lastRowThisPage = rowFrame;
nscoord spanningRowBottom = availHeight;
if (!rowIsOnPage) {
NS_ASSERTION(!contRow,
"We should not have created a continuation if none of "
"this row fits");
if (!prevRowFrame ||
(!aRowForcedPageBreak && ShouldAvoidBreakInside(aReflowInput))) {
aStatus.SetInlineLineBreakBeforeAndReset();
break;
}
spanningRowBottom = prevRowFrame->GetNormalRect().YMost();
lastRowThisPage = prevRowFrame;
aStatus.Reset();
aStatus.SetIncomplete();
}
// reflow the cells with rowspan >1 that occur on the page
nsTableRowFrame* firstTruncatedRow;
nscoord bMost;
SplitSpanningCells(*aPresContext, aReflowInput, *aTableFrame,
*firstRowThisPage, *lastRowThisPage,
aReflowInput.mFlags.mIsTopOfPage, spanningRowBottom,
contRow, firstTruncatedRow, bMost);
if (firstTruncatedRow) {
// A rowspan >1 cell did not fit (and could not split) in the space we
// gave it
if (firstTruncatedRow == firstRowThisPage) {
if (aReflowInput.mFlags.mIsTopOfPage) {
NS_WARNING("data loss in a row spanned cell");
} else {
// We can't push children, so let our parent reflow us again with
// more space
aDesiredSize.Height() = rowRect.YMost();
aStatus.Reset();
UndoContinuedRow(aPresContext, contRow);
contRow = nullptr;
}
} else { // (firstTruncatedRow != firstRowThisPage)
// Try to put firstTruncateRow on the next page
nsTableRowFrame* rowBefore =
::GetRowBefore(*firstRowThisPage, *firstTruncatedRow);
nscoord oldSpanningRowBottom = spanningRowBottom;
spanningRowBottom = rowBefore->GetNormalRect().YMost();
UndoContinuedRow(aPresContext, contRow);
contRow = nullptr;
nsTableRowFrame* oldLastRowThisPage = lastRowThisPage;
lastRowThisPage = rowBefore;
aStatus.Reset();
aStatus.SetIncomplete();
// Call SplitSpanningCells again with rowBefore as the last row on the
// page
SplitSpanningCells(
*aPresContext, aReflowInput, *aTableFrame, *firstRowThisPage,
*rowBefore, aReflowInput.mFlags.mIsTopOfPage, spanningRowBottom,
contRow, firstTruncatedRow, aDesiredSize.Height());
if (firstTruncatedRow) {
if (aReflowInput.mFlags.mIsTopOfPage) {
// We were better off with the 1st call to SplitSpanningCells, do
// it again
UndoContinuedRow(aPresContext, contRow);
contRow = nullptr;
lastRowThisPage = oldLastRowThisPage;
spanningRowBottom = oldSpanningRowBottom;
SplitSpanningCells(*aPresContext, aReflowInput, *aTableFrame,
*firstRowThisPage, *lastRowThisPage,
aReflowInput.mFlags.mIsTopOfPage,
spanningRowBottom, contRow, firstTruncatedRow,
aDesiredSize.Height());
NS_WARNING("data loss in a row spanned cell");
} else {
// Let our parent reflow us again with more space
aDesiredSize.Height() = rowRect.YMost();
aStatus.Reset();
UndoContinuedRow(aPresContext, contRow);
contRow = nullptr;
}
}
} // if (firstTruncatedRow == firstRowThisPage)
} // if (firstTruncatedRow)
else {
aDesiredSize.Height() = std::max(aDesiredSize.Height(), bMost);
if (contRow) {
aStatus.Reset();
aStatus.SetIncomplete();
}
}
if (aStatus.IsIncomplete() && !contRow) {
if (nsTableRowFrame* nextRow = lastRowThisPage->GetNextRow()) {
PushChildren(nextRow, lastRowThisPage);
}
} else if (aStatus.IsComplete() && lastRowThisPage) {
// Our size from the unconstrained reflow exceeded the constrained
// available space but our size in the constrained reflow is Complete.
// This can happen when a non-zero block-end margin is suppressed in
// nsBlockFrame::ComputeFinalSize.
if (nsTableRowFrame* nextRow = lastRowThisPage->GetNextRow()) {
aStatus.Reset();
aStatus.SetIncomplete();
PushChildren(nextRow, lastRowThisPage);
}
}
break;
} // if (rowRect.YMost() > availHeight)
else {
aDesiredSize.Height() = rowRect.YMost();
prevRowFrame = rowFrame;
// see if there is a page break after the row
nsTableRowFrame* nextRow = rowFrame->GetNextRow();
if (nextRow && nsTableFrame::PageBreakAfter(rowFrame, nextRow)) {
PushChildren(nextRow, rowFrame);
aStatus.Reset();
aStatus.SetIncomplete();
break;
}
}
// after the 1st row that has a height, we can't be on top
// of the page anymore.
isTopOfPage = isTopOfPage && rowRect.YMost() == 0;
}
return NS_OK;
}
/** Layout the entire row group.
* This method stacks rows vertically according to HTML 4.0 rules.
* Rows are responsible for layout of their children.
*/
void nsTableRowGroupFrame::Reflow(nsPresContext* aPresContext,
ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) {
MarkInReflow();
DO_GLOBAL_REFLOW_COUNT("nsTableRowGroupFrame");
DISPLAY_REFLOW(aPresContext, this, aReflowInput, aDesiredSize, aStatus);
MOZ_ASSERT(aStatus.IsEmpty(), "Caller should pass a fresh reflow status!");
// Row geometry may be going to change so we need to invalidate any row
// cursor.
ClearRowCursor();
// see if a special bsize reflow needs to occur due to having a pct bsize
nsTableFrame::CheckRequestSpecialBSizeReflow(aReflowInput);
nsTableFrame* tableFrame = GetTableFrame();
TableRowGroupReflowInput state(aReflowInput, tableFrame);
const nsStyleVisibility* groupVis = StyleVisibility();
bool collapseGroup = StyleVisibility::Collapse == groupVis->mVisible;
if (collapseGroup) {
tableFrame->SetNeedToCollapse(true);
}
// Check for an overflow list
MoveOverflowToChildList();
// Reflow the existing frames.
bool splitDueToPageBreak = false;
ReflowChildren(aPresContext, aDesiredSize, state, aStatus,
&splitDueToPageBreak);
// See if all the frames fit. Do not try to split anything if we're
// not paginated ... we can't split across columns yet.
if (aReflowInput.mFlags.mTableIsSplittable &&
NS_UNCONSTRAINEDSIZE != aReflowInput.AvailableHeight() &&
(aStatus.IsIncomplete() || splitDueToPageBreak ||
aDesiredSize.Height() > aReflowInput.AvailableHeight())) {
// Nope, find a place to split the row group
bool specialReflow = (bool)aReflowInput.mFlags.mSpecialBSizeReflow;
((ReflowInput::ReflowInputFlags&)aReflowInput.mFlags).mSpecialBSizeReflow =
false;
SplitRowGroup(aPresContext, aDesiredSize, aReflowInput, tableFrame, aStatus,
splitDueToPageBreak);
((ReflowInput::ReflowInputFlags&)aReflowInput.mFlags).mSpecialBSizeReflow =
specialReflow;
}
// XXXmats The following is just bogus. We leave it here for now because
// ReflowChildren should pull up rows from our next-in-flow before returning
// a Complete status, but doesn't (bug 804888).
if (GetNextInFlow() && GetNextInFlow()->PrincipalChildList().FirstChild()) {
aStatus.SetIncomplete();
}
SetHasStyleBSize((NS_UNCONSTRAINEDSIZE != aReflowInput.ComputedBSize()) &&
(aReflowInput.ComputedBSize() > 0));
// Just set our isize to what was available.
// The table will calculate the isize and not use our value.
WritingMode wm = aReflowInput.GetWritingMode();
aDesiredSize.ISize(wm) = aReflowInput.AvailableISize();
aDesiredSize.UnionOverflowAreasWithDesiredBounds();
// If our parent is in initial reflow, it'll handle invalidating our
// entire overflow rect.
if (!GetParent()->HasAnyStateBits(NS_FRAME_FIRST_REFLOW) &&
nsSize(aDesiredSize.Width(), aDesiredSize.Height()) != mRect.Size()) {
InvalidateFrame();
}
FinishAndStoreOverflow(&aDesiredSize);
// Any absolutely-positioned children will get reflowed in
// nsFrame::FixupPositionedTableParts in another pass, so propagate our
// dirtiness to them before our parent clears our dirty bits.
PushDirtyBitToAbsoluteFrames();
NS_FRAME_SET_TRUNCATION(aStatus, aReflowInput, aDesiredSize);
}
bool nsTableRowGroupFrame::ComputeCustomOverflow(
nsOverflowAreas& aOverflowAreas) {
// Row cursor invariants depend on the visual overflow area of the rows,
// which may have changed, so we need to clear the cursor now.
ClearRowCursor();
return nsContainerFrame::ComputeCustomOverflow(aOverflowAreas);
}
/* virtual */
void nsTableRowGroupFrame::DidSetComputedStyle(
ComputedStyle* aOldComputedStyle) {
nsContainerFrame::DidSetComputedStyle(aOldComputedStyle);
if (!aOldComputedStyle) // avoid this on init
return;
nsTableFrame* tableFrame = GetTableFrame();
if (tableFrame->IsBorderCollapse() &&
tableFrame->BCRecalcNeeded(aOldComputedStyle, Style())) {
TableArea damageArea(0, GetStartRowIndex(), tableFrame->GetColCount(),
GetRowCount());
tableFrame->AddBCDamageArea(damageArea);
}
}
void nsTableRowGroupFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) {
NS_ASSERTION(aListID == kPrincipalList, "unexpected child list");
DrainSelfOverflowList(); // ensure the last frame is in mFrames
ClearRowCursor();
// collect the new row frames in an array
// XXXbz why are we doing the QI stuff? There shouldn't be any non-rows here.
AutoTArray<nsTableRowFrame*, 8> rows;
for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
nsTableRowFrame* rowFrame = do_QueryFrame(e.get());
NS_ASSERTION(rowFrame, "Unexpected frame; frame constructor screwed up");
if (rowFrame) {
NS_ASSERTION(
mozilla::StyleDisplay::TableRow == e.get()->StyleDisplay()->mDisplay,
"wrong display type on rowframe");
rows.AppendElement(rowFrame);
}
}
int32_t rowIndex = GetRowCount();
// Append the frames to the sibling chain
mFrames.AppendFrames(nullptr, aFrameList);
if (rows.Length() > 0) {
nsTableFrame* tableFrame = GetTableFrame();
tableFrame->AppendRows(this, rowIndex, rows);
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::TreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
tableFrame->SetGeometryDirty();
}
}
void nsTableRowGroupFrame::InsertFrames(
ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine, nsFrameList& aFrameList) {
NS_ASSERTION(aListID == kPrincipalList, "unexpected child list");
NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
"inserting after sibling frame with different parent");
DrainSelfOverflowList(); // ensure aPrevFrame is in mFrames
ClearRowCursor();
// collect the new row frames in an array
// XXXbz why are we doing the QI stuff? There shouldn't be any non-rows here.
nsTableFrame* tableFrame = GetTableFrame();
nsTArray<nsTableRowFrame*> rows;
bool gotFirstRow = false;
for (nsFrameList::Enumerator e(aFrameList); !e.AtEnd(); e.Next()) {
nsTableRowFrame* rowFrame = do_QueryFrame(e.get());
NS_ASSERTION(rowFrame, "Unexpected frame; frame constructor screwed up");
if (rowFrame) {
NS_ASSERTION(
mozilla::StyleDisplay::TableRow == e.get()->StyleDisplay()->mDisplay,
"wrong display type on rowframe");
rows.AppendElement(rowFrame);
if (!gotFirstRow) {
rowFrame->SetFirstInserted(true);
gotFirstRow = true;
tableFrame->SetRowInserted(true);
}
}
}
int32_t startRowIndex = GetStartRowIndex();
// Insert the frames in the sibling chain
mFrames.InsertFrames(nullptr, aPrevFrame, aFrameList);
int32_t numRows = rows.Length();
if (numRows > 0) {
nsTableRowFrame* prevRow =
(nsTableRowFrame*)nsTableFrame::GetFrameAtOrBefore(
this, aPrevFrame, LayoutFrameType::TableRow);
int32_t rowIndex = (prevRow) ? prevRow->GetRowIndex() + 1 : startRowIndex;
tableFrame->InsertRows(this, rows, rowIndex, true);
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::TreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
tableFrame->SetGeometryDirty();
}
}
void nsTableRowGroupFrame::RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame) {
NS_ASSERTION(aListID == kPrincipalList, "unexpected child list");
ClearRowCursor();
// XXX why are we doing the QI stuff? There shouldn't be any non-rows here.
nsTableRowFrame* rowFrame = do_QueryFrame(aOldFrame);
if (rowFrame) {
nsTableFrame* tableFrame = GetTableFrame();
// remove the rows from the table (and flag a rebalance)
tableFrame->RemoveRows(*rowFrame, 1, true);
PresShell()->FrameNeedsReflow(this, IntrinsicDirty::TreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
tableFrame->SetGeometryDirty();
}
mFrames.DestroyFrame(aOldFrame);
}
/* virtual */
nsMargin nsTableRowGroupFrame::GetUsedMargin() const {
return nsMargin(0, 0, 0, 0);
}
/* virtual */
nsMargin nsTableRowGroupFrame::GetUsedBorder() const {
return nsMargin(0, 0, 0, 0);
}
/* virtual */
nsMargin nsTableRowGroupFrame::GetUsedPadding() const {
return nsMargin(0, 0, 0, 0);
}
nscoord nsTableRowGroupFrame::GetBSizeBasis(const ReflowInput& aReflowInput) {
nscoord result = 0;
nsTableFrame* tableFrame = GetTableFrame();
int32_t startRowIndex = GetStartRowIndex();
if ((aReflowInput.ComputedBSize() > 0) &&
(aReflowInput.ComputedBSize() < NS_UNCONSTRAINEDSIZE)) {
nscoord cellSpacing = tableFrame->GetRowSpacing(
startRowIndex,
std::max(startRowIndex, startRowIndex + GetRowCount() - 1));
result = aReflowInput.ComputedBSize() - cellSpacing;
} else {
const ReflowInput* parentRI = aReflowInput.mParentReflowInput;
if (parentRI && (tableFrame != parentRI->mFrame)) {
parentRI = parentRI->mParentReflowInput;
}
if (parentRI && (tableFrame == parentRI->mFrame) &&
(parentRI->ComputedBSize() > 0) &&
(parentRI->ComputedBSize() < NS_UNCONSTRAINEDSIZE)) {
nscoord cellSpacing =
tableFrame->GetRowSpacing(-1, tableFrame->GetRowCount());
result = parentRI->ComputedBSize() - cellSpacing;
}
}
return result;
}
bool nsTableRowGroupFrame::IsSimpleRowFrame(nsTableFrame* aTableFrame,
nsTableRowFrame* aRowFrame) {
int32_t rowIndex = aRowFrame->GetRowIndex();
// It's a simple row frame if there are no cells that span into or
// across the row
int32_t numEffCols = aTableFrame->GetEffectiveColCount();
if (!aTableFrame->RowIsSpannedInto(rowIndex, numEffCols) &&
!aTableFrame->RowHasSpanningCells(rowIndex, numEffCols)) {
return true;
}
return false;
}
/** find page break before the first row **/
bool nsTableRowGroupFrame::HasInternalBreakBefore() const {
nsIFrame* firstChild = mFrames.FirstChild();
if (!firstChild) return false;
return firstChild->StyleDisplay()->BreakBefore();
}
/** find page break after the last row **/
bool nsTableRowGroupFrame::HasInternalBreakAfter() const {
nsIFrame* lastChild = mFrames.LastChild();
if (!lastChild) return false;
return lastChild->StyleDisplay()->BreakAfter();
}
/* ----- global methods ----- */
nsTableRowGroupFrame* NS_NewTableRowGroupFrame(PresShell* aPresShell,
ComputedStyle* aStyle) {
return new (aPresShell)
nsTableRowGroupFrame(aStyle, aPresShell->GetPresContext());
}
NS_IMPL_FRAMEARENA_HELPERS(nsTableRowGroupFrame)
#ifdef DEBUG_FRAME_DUMP
nsresult nsTableRowGroupFrame::GetFrameName(nsAString& aResult) const {
return MakeFrameName(NS_LITERAL_STRING("TableRowGroup"), aResult);
}
#endif
LogicalMargin nsTableRowGroupFrame::GetBCBorderWidth(WritingMode aWM) {
LogicalMargin border(aWM);
nsTableRowFrame* firstRowFrame = nullptr;
nsTableRowFrame* lastRowFrame = nullptr;
for (nsTableRowFrame* rowFrame = GetFirstRow(); rowFrame;
rowFrame = rowFrame->GetNextRow()) {
if (!firstRowFrame) {
firstRowFrame = rowFrame;
}
lastRowFrame = rowFrame;
}
if (firstRowFrame) {
border.BStart(aWM) = PresContext()->DevPixelsToAppUnits(
firstRowFrame->GetBStartBCBorderWidth());
border.BEnd(aWM) = PresContext()->DevPixelsToAppUnits(
lastRowFrame->GetBEndBCBorderWidth());
}
return border;
}
void nsTableRowGroupFrame::SetContinuousBCBorderWidth(LogicalSide aForSide,
BCPixelSize aPixelValue) {
switch (aForSide) {
case eLogicalSideIEnd:
mIEndContBorderWidth = aPixelValue;
return;
case eLogicalSideBEnd:
mBEndContBorderWidth = aPixelValue;
return;
case eLogicalSideIStart:
mIStartContBorderWidth = aPixelValue;
return;
default:
NS_ERROR("invalid LogicalSide argument");
}
}
// nsILineIterator methods
int32_t nsTableRowGroupFrame::GetNumLines() const { return GetRowCount(); }
bool nsTableRowGroupFrame::GetDirection() {
return (StyleDirection::Rtl ==
GetTableFrame()->StyleVisibility()->mDirection);
}
NS_IMETHODIMP
nsTableRowGroupFrame::GetLine(int32_t aLineNumber, nsIFrame** aFirstFrameOnLine,
int32_t* aNumFramesOnLine,
nsRect& aLineBounds) const {
NS_ENSURE_ARG_POINTER(aFirstFrameOnLine);
NS_ENSURE_ARG_POINTER(aNumFramesOnLine);
nsTableFrame* table = GetTableFrame();
nsTableCellMap* cellMap = table->GetCellMap();
*aFirstFrameOnLine = nullptr;
*aNumFramesOnLine = 0;
aLineBounds.SetRect(0, 0, 0, 0);
if ((aLineNumber < 0) || (aLineNumber >= GetRowCount())) {
return NS_OK;
}
aLineNumber += GetStartRowIndex();
*aNumFramesOnLine = cellMap->GetNumCellsOriginatingInRow(aLineNumber);
if (*aNumFramesOnLine == 0) {
return NS_OK;
}
int32_t colCount = table->GetColCount();
for (int32_t i = 0; i < colCount; i++) {
CellData* data = cellMap->GetDataAt(aLineNumber, i);
if (data && data->IsOrig()) {
*aFirstFrameOnLine = (nsIFrame*)data->GetCellFrame();
nsIFrame* parent = (*aFirstFrameOnLine)->GetParent();
aLineBounds = parent->GetRect();
return NS_OK;
}
}
NS_ERROR("cellmap is lying");
return NS_ERROR_FAILURE;
}
int32_t nsTableRowGroupFrame::FindLineContaining(nsIFrame* aFrame,
int32_t aStartLine) {
NS_ENSURE_TRUE(aFrame, -1);
nsTableRowFrame* rowFrame = do_QueryFrame(aFrame);
NS_ASSERTION(rowFrame, "RowGroup contains a frame that is not a row");
int32_t rowIndexInGroup = rowFrame->GetRowIndex() - GetStartRowIndex();
return rowIndexInGroup >= aStartLine ? rowIndexInGroup : -1;
}
NS_IMETHODIMP
nsTableRowGroupFrame::CheckLineOrder(int32_t aLine, bool* aIsReordered,
nsIFrame** aFirstVisual,
nsIFrame** aLastVisual) {
*aIsReordered = false;
*aFirstVisual = nullptr;
*aLastVisual = nullptr;
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::FindFrameAt(int32_t aLineNumber, nsPoint aPos,
nsIFrame** aFrameFound,
bool* aPosIsBeforeFirstFrame,
bool* aPosIsAfterLastFrame) const {
nsTableFrame* table = GetTableFrame();
nsTableCellMap* cellMap = table->GetCellMap();
WritingMode wm = table->GetWritingMode();
nsSize containerSize = table->GetSize();
LogicalPoint pos(wm, aPos, containerSize);
*aFrameFound = nullptr;
*aPosIsBeforeFirstFrame = true;
*aPosIsAfterLastFrame = false;
aLineNumber += GetStartRowIndex();
int32_t numCells = cellMap->GetNumCellsOriginatingInRow(aLineNumber);
if (numCells == 0) {
return NS_OK;
}
nsIFrame* frame = nullptr;
int32_t colCount = table->GetColCount();
for (int32_t i = 0; i < colCount; i++) {
CellData* data = cellMap->GetDataAt(aLineNumber, i);
if (data && data->IsOrig()) {
frame = (nsIFrame*)data->GetCellFrame();
break;
}
}
NS_ASSERTION(frame, "cellmap is lying");
bool isRTL = (StyleDirection::Rtl == table->StyleVisibility()->mDirection);
nsIFrame* closestFromStart = nullptr;
nsIFrame* closestFromEnd = nullptr;
int32_t n = numCells;
nsIFrame* firstFrame = frame;
while (n--) {
LogicalRect rect = frame->GetLogicalRect(wm, containerSize);
if (rect.ISize(wm) > 0) {
// If pos.I() is inside this frame - this is it
if (rect.IStart(wm) <= pos.I(wm) && rect.IEnd(wm) > pos.I(wm)) {
closestFromStart = closestFromEnd = frame;
break;
}
if (rect.IStart(wm) < pos.I(wm)) {
if (!closestFromStart ||
rect.IEnd(wm) >
closestFromStart->GetLogicalRect(wm, containerSize).IEnd(wm))
closestFromStart = frame;
} else {
if (!closestFromEnd ||
rect.IStart(wm) <
closestFromEnd->GetLogicalRect(wm, containerSize).IStart(wm))
closestFromEnd = frame;
}
}
frame = frame->GetNextSibling();
}
if (!closestFromStart && !closestFromEnd) {
// All frames were zero-width. Just take the first one.
closestFromStart = closestFromEnd = firstFrame;
}
*aPosIsBeforeFirstFrame = isRTL ? !closestFromEnd : !closestFromStart;
*aPosIsAfterLastFrame = isRTL ? !closestFromStart : !closestFromEnd;
if (closestFromStart == closestFromEnd) {
*aFrameFound = closestFromStart;
} else if (!closestFromStart) {
*aFrameFound = closestFromEnd;
} else if (!closestFromEnd) {
*aFrameFound = closestFromStart;
} else { // we're between two frames
nscoord delta =
closestFromEnd->GetLogicalRect(wm, containerSize).IStart(wm) -
closestFromStart->GetLogicalRect(wm, containerSize).IEnd(wm);
if (pos.I(wm) <
closestFromStart->GetLogicalRect(wm, containerSize).IEnd(wm) +
delta / 2) {
*aFrameFound = closestFromStart;
} else {
*aFrameFound = closestFromEnd;
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::GetNextSiblingOnLine(nsIFrame*& aFrame,
int32_t aLineNumber) const {
NS_ENSURE_ARG_POINTER(aFrame);
aFrame = aFrame->GetNextSibling();
return NS_OK;
}
// end nsLineIterator methods
NS_DECLARE_FRAME_PROPERTY_DELETABLE(RowCursorProperty,
nsTableRowGroupFrame::FrameCursorData)
void nsTableRowGroupFrame::ClearRowCursor() {
if (!HasAnyStateBits(NS_ROWGROUP_HAS_ROW_CURSOR)) {
return;
}
RemoveStateBits(NS_ROWGROUP_HAS_ROW_CURSOR);
RemoveProperty(RowCursorProperty());
}
nsTableRowGroupFrame::FrameCursorData* nsTableRowGroupFrame::SetupRowCursor() {
if (HasAnyStateBits(NS_ROWGROUP_HAS_ROW_CURSOR)) {
// We already have a valid row cursor. Don't waste time rebuilding it.
return nullptr;
}
nsIFrame* f = mFrames.FirstChild();
int32_t count;
for (count = 0; f && count < MIN_ROWS_NEEDING_CURSOR; ++count) {
f = f->GetNextSibling();
}
if (!f) {
// Less than MIN_ROWS_NEEDING_CURSOR rows, so just don't bother
return nullptr;
}
FrameCursorData* data = new FrameCursorData();
if (!data) return nullptr;
SetProperty(RowCursorProperty(), data);
AddStateBits(NS_ROWGROUP_HAS_ROW_CURSOR);
return data;
}
nsIFrame* nsTableRowGroupFrame::GetFirstRowContaining(nscoord aY,
nscoord* aOverflowAbove) {
if (!HasAnyStateBits(NS_ROWGROUP_HAS_ROW_CURSOR)) {
return nullptr;
}
FrameCursorData* property = GetProperty(RowCursorProperty());
uint32_t cursorIndex = property->mCursorIndex;
uint32_t frameCount = property->mFrames.Length();
if (cursorIndex >= frameCount) return nullptr;
nsIFrame* cursorFrame = property->mFrames[cursorIndex];
// The cursor's frame list excludes frames with empty overflow-area, so
// we don't need to check that here.
// We use property->mOverflowBelow here instead of computing the frame's
// true overflowArea.YMost(), because it is essential for the thresholds
// to form a monotonically increasing sequence. Otherwise we would break
// encountering a row whose overflowArea.YMost() is <= aY but which has
// a row above it containing cell(s) that span to include aY.
while (cursorIndex > 0 &&
cursorFrame->GetRect().YMost() + property->mOverflowBelow > aY) {
--cursorIndex;
cursorFrame = property->mFrames[cursorIndex];
}
while (cursorIndex + 1 < frameCount &&
cursorFrame->GetRect().YMost() + property->mOverflowBelow <= aY) {
++cursorIndex;
cursorFrame = property->mFrames[cursorIndex];
}
property->mCursorIndex = cursorIndex;
*aOverflowAbove = property->mOverflowAbove;
return cursorFrame;
}
bool nsTableRowGroupFrame::FrameCursorData::AppendFrame(nsIFrame* aFrame) {
// The cursor requires a monotonically increasing sequence in order to
// identify which rows can be skipped, and position:relative can move
// rows around such that the overflow areas don't provide this.
// We take the union of the overflow rect, and the frame's 'normal' position
// (excluding position:relative changes) and record the max difference between
// this combined overflow and the frame's rect.
nsRect positionedOverflowRect = aFrame->GetVisualOverflowRect();
nsPoint positionedToNormal =
aFrame->GetNormalPosition() - aFrame->GetPosition();
nsRect normalOverflowRect = positionedOverflowRect + positionedToNormal;
nsRect overflowRect = positionedOverflowRect.Union(normalOverflowRect);
if (overflowRect.IsEmpty()) return true;
nscoord overflowAbove = -overflowRect.y;
nscoord overflowBelow = overflowRect.YMost() - aFrame->GetSize().height;
mOverflowAbove = std::max(mOverflowAbove, overflowAbove);
mOverflowBelow = std::max(mOverflowBelow, overflowBelow);
// XXX(Bug 1631371) Check if this should use a fallible operation as it
// pretended earlier, or change the return type to void.
mFrames.AppendElement(aFrame);
return true;
}
void nsTableRowGroupFrame::InvalidateFrame(uint32_t aDisplayItemKey,
bool aRebuildDisplayItems) {
nsIFrame::InvalidateFrame(aDisplayItemKey, aRebuildDisplayItems);
if (GetTableFrame()->IsBorderCollapse()) {
GetParent()->InvalidateFrameWithRect(
GetVisualOverflowRect() + GetPosition(), aDisplayItemKey, false);
}
}
void nsTableRowGroupFrame::InvalidateFrameWithRect(const nsRect& aRect,
uint32_t aDisplayItemKey,
bool aRebuildDisplayItems) {
nsIFrame::InvalidateFrameWithRect(aRect, aDisplayItemKey,
aRebuildDisplayItems);
// If we have filters applied that would affects our bounds, then
// we get an inactive layer created and this is computed
// within FrameLayerBuilder
GetParent()->InvalidateFrameWithRect(aRect + GetPosition(), aDisplayItemKey,
false);
}
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