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nsTableRowFrame.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 "nsTableRowFrame.h"
#include "nsTableRowGroupFrame.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsGkAtoms.h"
#include "nsIContent.h"
#include "nsTableFrame.h"
#include "nsTableCellFrame.h"
#include "nsCSSRendering.h"
#include "nsHTMLParts.h"
#include "nsTableColGroupFrame.h"
#include "nsTableColFrame.h"
#include "nsCOMPtr.h"
#include "nsDisplayList.h"
#include "nsIFrameInlines.h"
#include <algorithm>
using namespace mozilla;
struct nsTableCellReflowState : public nsHTMLReflowState
{
nsTableCellReflowState(nsPresContext* aPresContext,
const nsHTMLReflowState& aParentReflowState,
nsIFrame* aFrame,
const LogicalSize& aAvailableSpace,
uint32_t aFlags = 0)
: nsHTMLReflowState(aPresContext, aParentReflowState, aFrame,
aAvailableSpace, -1, -1, aFlags)
{
}
void FixUp(const nsSize& aAvailSpace);
};
void nsTableCellReflowState::FixUp(const nsSize& aAvailSpace)
{
// fix the mComputed values during a pass 2 reflow since the cell can be a percentage base
NS_WARN_IF_FALSE(NS_UNCONSTRAINEDSIZE != aAvailSpace.width,
"have unconstrained width; this should only result from "
"very large sizes, not attempts at intrinsic width "
"calculation");
if (NS_UNCONSTRAINEDSIZE != ComputedWidth()) {
nscoord computedWidth =
aAvailSpace.width - mComputedBorderPadding.LeftRight();
computedWidth = std::max(0, computedWidth);
SetComputedWidth(computedWidth);
}
if (NS_UNCONSTRAINEDSIZE != ComputedHeight() &&
NS_UNCONSTRAINEDSIZE != aAvailSpace.height) {
nscoord computedHeight =
aAvailSpace.height - mComputedBorderPadding.TopBottom();
computedHeight = std::max(0, computedHeight);
SetComputedHeight(computedHeight);
}
}
void
nsTableRowFrame::InitChildReflowState(nsPresContext& aPresContext,
const nsSize& aAvailSize,
bool aBorderCollapse,
nsTableCellReflowState& aReflowState)
{
nsMargin collapseBorder;
nsMargin* pCollapseBorder = nullptr;
if (aBorderCollapse) {
// we only reflow cells, so don't need to check frame type
nsBCTableCellFrame* bcCellFrame = (nsBCTableCellFrame*)aReflowState.frame;
if (bcCellFrame) {
pCollapseBorder = bcCellFrame->GetBorderWidth(collapseBorder);
}
}
aReflowState.Init(&aPresContext, -1, -1, pCollapseBorder);
aReflowState.FixUp(aAvailSize);
}
void
nsTableRowFrame::SetFixedHeight(nscoord aValue)
{
nscoord height = std::max(0, aValue);
if (HasFixedHeight()) {
if (height > mStyleFixedHeight) {
mStyleFixedHeight = height;
}
}
else {
mStyleFixedHeight = height;
if (height > 0) {
SetHasFixedHeight(true);
}
}
}
void
nsTableRowFrame::SetPctHeight(float aPctValue,
bool aForce)
{
nscoord height = std::max(0, NSToCoordRound(aPctValue * 100.0f));
if (HasPctHeight()) {
if ((height > mStylePctHeight) || aForce) {
mStylePctHeight = height;
}
}
else {
mStylePctHeight = height;
if (height > 0) {
SetHasPctHeight(true);
}
}
}
/* ----------- nsTableRowFrame ---------- */
NS_QUERYFRAME_HEAD(nsTableRowFrame)
NS_QUERYFRAME_ENTRY(nsTableRowFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsContainerFrame)
nsTableRowFrame::nsTableRowFrame(nsStyleContext* aContext)
: nsContainerFrame(aContext)
{
mBits.mRowIndex = mBits.mFirstInserted = 0;
ResetHeight(0);
}
nsTableRowFrame::~nsTableRowFrame()
{
}
void
nsTableRowFrame::Init(nsIContent* aContent,
nsContainerFrame* aParent,
nsIFrame* aPrevInFlow)
{
// Let the base class do its initialization
nsContainerFrame::Init(aContent, aParent, aPrevInFlow);
NS_ASSERTION(NS_STYLE_DISPLAY_TABLE_ROW == StyleDisplay()->mDisplay,
"wrong display on table row frame");
if (aPrevInFlow) {
// Set the row index
nsTableRowFrame* rowFrame = (nsTableRowFrame*)aPrevInFlow;
SetRowIndex(rowFrame->GetRowIndex());
}
}
void
nsTableRowFrame::DestroyFrom(nsIFrame* aDestructRoot)
{
if (GetStateBits() & NS_FRAME_CAN_HAVE_ABSPOS_CHILDREN) {
nsTableFrame::UnregisterPositionedTablePart(this, aDestructRoot);
}
nsContainerFrame::DestroyFrom(aDestructRoot);
}
/* virtual */ void
nsTableRowFrame::DidSetStyleContext(nsStyleContext* aOldStyleContext)
{
nsContainerFrame::DidSetStyleContext(aOldStyleContext);
if (!aOldStyleContext) //avoid this on init
return;
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (tableFrame->IsBorderCollapse() &&
tableFrame->BCRecalcNeeded(aOldStyleContext, StyleContext())) {
nsIntRect damageArea(0, GetRowIndex(), tableFrame->GetColCount(), 1);
tableFrame->AddBCDamageArea(damageArea);
}
}
void
nsTableRowFrame::AppendFrames(ChildListID aListID,
nsFrameList& aFrameList)
{
NS_ASSERTION(aListID == kPrincipalList, "unexpected child list");
const nsFrameList::Slice& newCells = mFrames.AppendFrames(nullptr, aFrameList);
// Add the new cell frames to the table
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
for (nsFrameList::Enumerator e(newCells) ; !e.AtEnd(); e.Next()) {
nsIFrame *childFrame = e.get();
NS_ASSERTION(IS_TABLE_CELL(childFrame->GetType()),"Not a table cell frame/pseudo frame construction failure");
tableFrame->AppendCell(static_cast<nsTableCellFrame&>(*childFrame), GetRowIndex());
}
PresContext()->PresShell()->FrameNeedsReflow(this, nsIPresShell::eTreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
tableFrame->SetGeometryDirty();
}
void
nsTableRowFrame::InsertFrames(ChildListID aListID,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList)
{
NS_ASSERTION(aListID == kPrincipalList, "unexpected child list");
NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
"inserting after sibling frame with different parent");
//Insert Frames in the frame list
const nsFrameList::Slice& newCells = mFrames.InsertFrames(nullptr, aPrevFrame, aFrameList);
// Get the table frame
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
nsIAtom* cellFrameType = tableFrame->IsBorderCollapse() ? nsGkAtoms::bcTableCellFrame : nsGkAtoms::tableCellFrame;
nsTableCellFrame* prevCellFrame = (nsTableCellFrame *)nsTableFrame::GetFrameAtOrBefore(this, aPrevFrame, cellFrameType);
nsTArray<nsTableCellFrame*> cellChildren;
for (nsFrameList::Enumerator e(newCells); !e.AtEnd(); e.Next()) {
nsIFrame *childFrame = e.get();
NS_ASSERTION(IS_TABLE_CELL(childFrame->GetType()),"Not a table cell frame/pseudo frame construction failure");
cellChildren.AppendElement(static_cast<nsTableCellFrame*>(childFrame));
}
// insert the cells into the cell map
int32_t colIndex = -1;
if (prevCellFrame) {
prevCellFrame->GetColIndex(colIndex);
}
tableFrame->InsertCells(cellChildren, GetRowIndex(), colIndex);
PresContext()->PresShell()->FrameNeedsReflow(this, nsIPresShell::eTreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
tableFrame->SetGeometryDirty();
}
void
nsTableRowFrame::RemoveFrame(ChildListID aListID,
nsIFrame* aOldFrame)
{
NS_ASSERTION(aListID == kPrincipalList, "unexpected child list");
MOZ_ASSERT((nsTableCellFrame*)do_QueryFrame(aOldFrame));
nsTableCellFrame* cellFrame = static_cast<nsTableCellFrame*>(aOldFrame);
// remove the cell from the cell map
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
tableFrame->RemoveCell(cellFrame, GetRowIndex());
// Remove the frame and destroy it
mFrames.DestroyFrame(aOldFrame);
PresContext()->PresShell()->
FrameNeedsReflow(this, nsIPresShell::eTreeChange,
NS_FRAME_HAS_DIRTY_CHILDREN);
tableFrame->SetGeometryDirty();
}
/* virtual */ nsMargin
nsTableRowFrame::GetUsedMargin() const
{
return nsMargin(0,0,0,0);
}
/* virtual */ nsMargin
nsTableRowFrame::GetUsedBorder() const
{
return nsMargin(0,0,0,0);
}
/* virtual */ nsMargin
nsTableRowFrame::GetUsedPadding() const
{
return nsMargin(0,0,0,0);
}
nscoord
GetHeightOfRowsSpannedBelowFirst(nsTableCellFrame& aTableCellFrame,
nsTableFrame& aTableFrame)
{
nscoord height = 0;
int32_t rowSpan = aTableFrame.GetEffectiveRowSpan(aTableCellFrame);
// add in height of rows spanned beyond the 1st one
nsIFrame* nextRow = aTableCellFrame.GetParent()->GetNextSibling();
for (int32_t rowX = 1; ((rowX < rowSpan) && nextRow);) {
if (nsGkAtoms::tableRowFrame == nextRow->GetType()) {
height += nextRow->GetSize().height;
rowX++;
}
height += aTableFrame.GetCellSpacingY(rowX);
nextRow = nextRow->GetNextSibling();
}
return height;
}
nsTableCellFrame*
nsTableRowFrame::GetFirstCell()
{
nsIFrame* childFrame = mFrames.FirstChild();
while (childFrame) {
nsTableCellFrame *cellFrame = do_QueryFrame(childFrame);
if (cellFrame) {
return cellFrame;
}
childFrame = childFrame->GetNextSibling();
}
return nullptr;
}
/**
* Post-reflow hook. This is where the table row does its post-processing
*/
void
nsTableRowFrame::DidResize()
{
// Resize and re-align the cell frames based on our row height
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
nsTableIterator iter(*this);
nsIFrame* childFrame = iter.First();
WritingMode wm = GetWritingMode();
nsHTMLReflowMetrics desiredSize(wm);
desiredSize.SetSize(wm, GetLogicalSize(wm));
desiredSize.SetOverflowAreasToDesiredBounds();
while (childFrame) {
nsTableCellFrame *cellFrame = do_QueryFrame(childFrame);
if (cellFrame) {
nscoord cellHeight = mRect.height + GetHeightOfRowsSpannedBelowFirst(*cellFrame, *tableFrame);
// resize the cell's height
nsRect cellRect = cellFrame->GetRect();
nsRect cellVisualOverflow = cellFrame->GetVisualOverflowRect();
if (cellRect.height != cellHeight)
{
cellFrame->SetSize(nsSize(cellRect.width, cellHeight));
nsTableFrame::InvalidateTableFrame(cellFrame, cellRect,
cellVisualOverflow,
false);
}
// realign cell content based on the new height. We might be able to
// skip this if the height didn't change... maybe. Hard to tell.
cellFrame->VerticallyAlignChild(mMaxCellAscent);
// Always store the overflow, even if the height didn't change, since
// we'll lose part of our overflow area otherwise.
ConsiderChildOverflow(desiredSize.mOverflowAreas, cellFrame);
// Note that if the cell's *content* needs to change in response
// to this height, it will get a special height reflow.
}
// Get the next child
childFrame = iter.Next();
}
FinishAndStoreOverflow(&desiredSize);
if (HasView()) {
nsContainerFrame::SyncFrameViewAfterReflow(PresContext(), this, GetView(),
desiredSize.VisualOverflow(), 0);
}
// Let our base class do the usual work
}
// returns max-ascent amongst all cells that have 'vertical-align: baseline'
// *including* cells with rowspans
nscoord nsTableRowFrame::GetMaxCellAscent() const
{
return mMaxCellAscent;
}
nscoord nsTableRowFrame::GetRowBaseline(WritingMode aWritingMode)
{
if(mMaxCellAscent)
return mMaxCellAscent;
// If we don't have a baseline on any of the cells we go for the lowest
// content edge of the inner block frames.
// Every table cell has a cell frame with its border and padding. Inside
// the cell is a block frame. The cell is as high as the tallest cell in
// the parent row. As a consequence the block frame might not touch both
// the top and the bottom padding of it parent cell frame at the same time.
//
// bbbbbbbbbbbbbbbbbb cell border: b
// bppppppppppppppppb cell padding: p
// bpxxxxxxxxxxxxxxpb inner block: x
// bpx xpb
// bpx xpb
// bpx xpb
// bpxxxxxxxxxxxxxxpb base line
// bp pb
// bp pb
// bppppppppppppppppb
// bbbbbbbbbbbbbbbbbb
nsTableIterator iter(*this);
nsIFrame* childFrame = iter.First();
nscoord ascent = 0;
while (childFrame) {
if (IS_TABLE_CELL(childFrame->GetType())) {
nsIFrame* firstKid = childFrame->GetFirstPrincipalChild();
ascent = std::max(ascent, firstKid->GetRect().YMost());
}
// Get the next child
childFrame = iter.Next();
}
return ascent;
}
nscoord
nsTableRowFrame::GetHeight(nscoord aPctBasis) const
{
nscoord height = 0;
if ((aPctBasis > 0) && HasPctHeight()) {
height = NSToCoordRound(GetPctHeight() * (float)aPctBasis);
}
if (HasFixedHeight()) {
height = std::max(height, GetFixedHeight());
}
return std::max(height, GetContentHeight());
}
void
nsTableRowFrame::ResetHeight(nscoord aFixedHeight)
{
SetHasFixedHeight(false);
SetHasPctHeight(false);
SetFixedHeight(0);
SetPctHeight(0);
SetContentHeight(0);
if (aFixedHeight > 0) {
SetFixedHeight(aFixedHeight);
}
mMaxCellAscent = 0;
mMaxCellDescent = 0;
}
void
nsTableRowFrame::UpdateHeight(nscoord aHeight,
nscoord aAscent,
nscoord aDescent,
nsTableFrame* aTableFrame,
nsTableCellFrame* aCellFrame)
{
if (!aTableFrame || !aCellFrame) {
NS_ASSERTION(false , "invalid call");
return;
}
if (aHeight != NS_UNCONSTRAINEDSIZE) {
if (!(aCellFrame->HasVerticalAlignBaseline())) { // only the cell's height matters
if (GetHeight() < aHeight) {
int32_t rowSpan = aTableFrame->GetEffectiveRowSpan(*aCellFrame);
if (rowSpan == 1) {
SetContentHeight(aHeight);
}
}
}
else { // the alignment on the baseline can change the height
NS_ASSERTION((aAscent != NS_UNCONSTRAINEDSIZE) && (aDescent != NS_UNCONSTRAINEDSIZE), "invalid call");
// see if this is a long ascender
if (mMaxCellAscent < aAscent) {
mMaxCellAscent = aAscent;
}
// see if this is a long descender and without rowspan
if (mMaxCellDescent < aDescent) {
int32_t rowSpan = aTableFrame->GetEffectiveRowSpan(*aCellFrame);
if (rowSpan == 1) {
mMaxCellDescent = aDescent;
}
}
// keep the tallest height in sync
if (GetHeight() < mMaxCellAscent + mMaxCellDescent) {
SetContentHeight(mMaxCellAscent + mMaxCellDescent);
}
}
}
}
nscoord
nsTableRowFrame::CalcHeight(const nsHTMLReflowState& aReflowState)
{
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
nscoord computedHeight = (NS_UNCONSTRAINEDSIZE == aReflowState.ComputedHeight())
? 0 : aReflowState.ComputedHeight();
ResetHeight(computedHeight);
const nsStylePosition* position = StylePosition();
if (position->mHeight.ConvertsToLength()) {
SetFixedHeight(nsRuleNode::ComputeCoordPercentCalc(position->mHeight, 0));
}
else if (eStyleUnit_Percent == position->mHeight.GetUnit()) {
SetPctHeight(position->mHeight.GetPercentValue());
}
// calc() with percentages is treated like 'auto' on table rows.
for (nsIFrame* kidFrame = mFrames.FirstChild(); kidFrame;
kidFrame = kidFrame->GetNextSibling()) {
nsTableCellFrame *cellFrame = do_QueryFrame(kidFrame);
if (cellFrame) {
WritingMode wm = cellFrame->GetWritingMode();
LogicalSize desSize = cellFrame->GetDesiredSize();
if ((NS_UNCONSTRAINEDSIZE == aReflowState.AvailableHeight()) && !GetPrevInFlow()) {
CalculateCellActualHeight(cellFrame, desSize.BSize(wm));
}
// height may have changed, adjust descent to absorb any excess difference
nscoord ascent;
if (!kidFrame->GetFirstPrincipalChild()->GetFirstPrincipalChild())
ascent = desSize.BSize(wm);
else
ascent = cellFrame->GetCellBaseline();
nscoord descent = desSize.BSize(wm) - ascent;
UpdateHeight(desSize.BSize(wm), ascent, descent, tableFrame, cellFrame);
}
}
return GetHeight();
}
/**
* We need a custom display item for table row backgrounds. This is only used
* when the table row is the root of a stacking context (e.g., has 'opacity').
* Table row backgrounds can extend beyond the row frame bounds, when
* the row contains row-spanning cells.
*/
class nsDisplayTableRowBackground : public nsDisplayTableItem {
public:
nsDisplayTableRowBackground(nsDisplayListBuilder* aBuilder,
nsTableRowFrame* aFrame) :
nsDisplayTableItem(aBuilder, aFrame) {
MOZ_COUNT_CTOR(nsDisplayTableRowBackground);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayTableRowBackground() {
MOZ_COUNT_DTOR(nsDisplayTableRowBackground);
}
#endif
virtual void ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion) MOZ_OVERRIDE;
virtual void Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx) MOZ_OVERRIDE;
NS_DISPLAY_DECL_NAME("TableRowBackground", TYPE_TABLE_ROW_BACKGROUND)
};
void
nsDisplayTableRowBackground::ComputeInvalidationRegion(nsDisplayListBuilder* aBuilder,
const nsDisplayItemGeometry* aGeometry,
nsRegion *aInvalidRegion)
{
if (aBuilder->ShouldSyncDecodeImages()) {
if (nsTableFrame::AnyTablePartHasUndecodedBackgroundImage(mFrame, mFrame->GetNextSibling())) {
bool snap;
aInvalidRegion->Or(*aInvalidRegion, GetBounds(aBuilder, &snap));
}
}
nsDisplayTableItem::ComputeInvalidationRegion(aBuilder, aGeometry, aInvalidRegion);
}
void
nsDisplayTableRowBackground::Paint(nsDisplayListBuilder* aBuilder,
nsRenderingContext* aCtx)
{
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(mFrame);
TableBackgroundPainter painter(tableFrame,
TableBackgroundPainter::eOrigin_TableRow,
mFrame->PresContext(), *aCtx,
mVisibleRect, ToReferenceFrame(),
aBuilder->GetBackgroundPaintFlags());
painter.PaintRow(static_cast<nsTableRowFrame*>(mFrame));
}
void
nsTableRowFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
nsDisplayTableItem* item = nullptr;
if (IsVisibleInSelection(aBuilder)) {
bool isRoot = aBuilder->IsAtRootOfPseudoStackingContext();
if (isRoot) {
// This background is created regardless of whether this frame is
// visible or not. Visibility decisions are delegated to the
// table background painter.
// We would use nsDisplayGeneric for this rare case except that we
// need the background to be larger than the row frame in some
// cases.
item = new (aBuilder) nsDisplayTableRowBackground(aBuilder, this);
aLists.BorderBackground()->AppendNewToTop(item);
}
}
nsTableFrame::DisplayGenericTablePart(aBuilder, this, aDirtyRect, aLists, item);
}
nsIFrame::LogicalSides
nsTableRowFrame::GetLogicalSkipSides(const nsHTMLReflowState* aReflowState) const
{
if (MOZ_UNLIKELY(StyleBorder()->mBoxDecorationBreak ==
NS_STYLE_BOX_DECORATION_BREAK_CLONE)) {
return LogicalSides();
}
LogicalSides skip;
if (nullptr != GetPrevInFlow()) {
skip |= eLogicalSideBitsBStart;
}
if (nullptr != GetNextInFlow()) {
skip |= eLogicalSideBitsBEnd;
}
return skip;
}
// Calculate the cell's actual height given its pass2 height.
// Takes into account the specified height (in the style).
// Modifies the desired height that is passed in.
nsresult
nsTableRowFrame::CalculateCellActualHeight(nsTableCellFrame* aCellFrame,
nscoord& aDesiredHeight)
{
nscoord specifiedHeight = 0;
// Get the height specified in the style information
const nsStylePosition* position = aCellFrame->StylePosition();
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
int32_t rowSpan = tableFrame->GetEffectiveRowSpan(*aCellFrame);
switch (position->mHeight.GetUnit()) {
case eStyleUnit_Calc: {
if (position->mHeight.CalcHasPercent()) {
// Treat this like "auto"
break;
}
// Fall through to the coord case
}
case eStyleUnit_Coord: {
nscoord outsideBoxSizing = 0;
// In quirks mode, table cell width should be content-box, but height
// should be border-box.
// Because of this historic anomaly, we do not use quirk.css
// (since we can't specify one value of box-sizing for width and another
// for height)
if (PresContext()->CompatibilityMode() != eCompatibility_NavQuirks) {
switch (position->mBoxSizing) {
case NS_STYLE_BOX_SIZING_CONTENT:
outsideBoxSizing = aCellFrame->GetUsedBorderAndPadding().TopBottom();
break;
case NS_STYLE_BOX_SIZING_PADDING:
outsideBoxSizing = aCellFrame->GetUsedBorder().TopBottom();
break;
default:
// NS_STYLE_BOX_SIZING_BORDER
break;
}
}
specifiedHeight =
nsRuleNode::ComputeCoordPercentCalc(position->mHeight, 0) +
outsideBoxSizing;
if (1 == rowSpan)
SetFixedHeight(specifiedHeight);
break;
}
case eStyleUnit_Percent: {
if (1 == rowSpan)
SetPctHeight(position->mHeight.GetPercentValue());
// pct heights are handled when all of the cells are finished, so don't set specifiedHeight
break;
}
case eStyleUnit_Auto:
default:
break;
}
// If the specified height is greater than the desired height, then use the specified height
if (specifiedHeight > aDesiredHeight)
aDesiredHeight = specifiedHeight;
return NS_OK;
}
// Calculates the available width for the table cell based on the known
// column widths taking into account column spans and column spacing
static nscoord
CalcAvailWidth(nsTableFrame& aTableFrame,
nsTableCellFrame& aCellFrame)
{
nscoord cellAvailWidth = 0;
int32_t colIndex;
aCellFrame.GetColIndex(colIndex);
int32_t colspan = aTableFrame.GetEffectiveColSpan(aCellFrame);
NS_ASSERTION(colspan > 0, "effective colspan should be positive");
for (int32_t spanX = 0; spanX < colspan; spanX++) {
cellAvailWidth += aTableFrame.GetColumnWidth(colIndex + spanX);
if (spanX > 0 &&
aTableFrame.ColumnHasCellSpacingBefore(colIndex + spanX)) {
cellAvailWidth += aTableFrame.GetCellSpacingX(colIndex + spanX - 1);
}
}
return cellAvailWidth;
}
nscoord
GetSpaceBetween(int32_t aPrevColIndex,
int32_t aColIndex,
int32_t aColSpan,
nsTableFrame& aTableFrame,
bool aIsLeftToRight,
bool aCheckVisibility)
{
nscoord space = 0;
int32_t colX;
if (aIsLeftToRight) {
for (colX = aPrevColIndex + 1; aColIndex > colX; colX++) {
bool isCollapsed = false;
if (!aCheckVisibility) {
space += aTableFrame.GetColumnWidth(colX);
}
else {
nsTableColFrame* colFrame = aTableFrame.GetColFrame(colX);
const nsStyleVisibility* colVis = colFrame->StyleVisibility();
bool collapseCol = (NS_STYLE_VISIBILITY_COLLAPSE == colVis->mVisible);
nsIFrame* cgFrame = colFrame->GetParent();
const nsStyleVisibility* groupVis = cgFrame->StyleVisibility();
bool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE ==
groupVis->mVisible);
isCollapsed = collapseCol || collapseGroup;
if (!isCollapsed)
space += aTableFrame.GetColumnWidth(colX);
}
if (!isCollapsed && aTableFrame.ColumnHasCellSpacingBefore(colX)) {
space += aTableFrame.GetCellSpacingX(colX - 1);
}
}
}
else {
int32_t lastCol = aColIndex + aColSpan - 1;
for (colX = aPrevColIndex - 1; colX > lastCol; colX--) {
bool isCollapsed = false;
if (!aCheckVisibility) {
space += aTableFrame.GetColumnWidth(colX);
}
else {
nsTableColFrame* colFrame = aTableFrame.GetColFrame(colX);
const nsStyleVisibility* colVis = colFrame->StyleVisibility();
bool collapseCol = (NS_STYLE_VISIBILITY_COLLAPSE == colVis->mVisible);
nsIFrame* cgFrame = colFrame->GetParent();
const nsStyleVisibility* groupVis = cgFrame->StyleVisibility();
bool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE ==
groupVis->mVisible);
isCollapsed = collapseCol || collapseGroup;
if (!isCollapsed)
space += aTableFrame.GetColumnWidth(colX);
}
if (!isCollapsed && aTableFrame.ColumnHasCellSpacingBefore(colX)) {
space += aTableFrame.GetCellSpacingX(colX - 1);
}
}
}
return space;
}
// subtract the heights of aRow's prev in flows from the unpaginated height
static
nscoord CalcHeightFromUnpaginatedHeight(nsPresContext* aPresContext,
nsTableRowFrame& aRow)
{
nscoord height = 0;
nsTableRowFrame* firstInFlow =
static_cast<nsTableRowFrame*>(aRow.FirstInFlow());
if (firstInFlow->HasUnpaginatedHeight()) {
height = firstInFlow->GetUnpaginatedHeight(aPresContext);
for (nsIFrame* prevInFlow = aRow.GetPrevInFlow(); prevInFlow;
prevInFlow = prevInFlow->GetPrevInFlow()) {
height -= prevInFlow->GetSize().height;
}
}
return std::max(height, 0);
}
void
nsTableRowFrame::ReflowChildren(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
nsReflowStatus& aStatus)
{
aStatus = NS_FRAME_COMPLETE;
// XXXldb Should we be checking constrained height instead?
const bool isPaginated = aPresContext->IsPaginated();
const bool borderCollapse = aTableFrame.IsBorderCollapse();
int32_t cellColSpan = 1; // must be defined here so it's set properly for non-cell kids
nsTableIterator iter(*this);
// remember the col index of the previous cell to handle rowspans into this row
int32_t firstPrevColIndex = (iter.IsLeftToRight()) ? -1 : aTableFrame.GetColCount();
int32_t prevColIndex = firstPrevColIndex;
nscoord x = 0; // running total of children x offset
// This computes the max of all cell heights
nscoord cellMaxHeight = 0;
// Reflow each of our existing cell frames
for (nsIFrame* kidFrame = iter.First(); kidFrame; kidFrame = iter.Next()) {
nsTableCellFrame *cellFrame = do_QueryFrame(kidFrame);
if (!cellFrame) {
// XXXldb nsCSSFrameConstructor needs to enforce this!
NS_NOTREACHED("yikes, a non-row child");
// it's an unknown frame type, give it a generic reflow and ignore the results
nsTableCellReflowState
kidReflowState(aPresContext, aReflowState, kidFrame,
LogicalSize(kidFrame->GetWritingMode(), 0, 0),
nsHTMLReflowState::CALLER_WILL_INIT);
InitChildReflowState(*aPresContext, nsSize(0,0), false, kidReflowState);
nsHTMLReflowMetrics desiredSize(aReflowState);
nsReflowStatus status;
ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState, 0, 0, 0, status);
kidFrame->DidReflow(aPresContext, nullptr, nsDidReflowStatus::FINISHED);
continue;
}
// See if we should only reflow the dirty child frames
bool doReflowChild = true;
if (!aReflowState.ShouldReflowAllKids() &&
!aTableFrame.IsGeometryDirty() &&
!NS_SUBTREE_DIRTY(kidFrame)) {
if (!aReflowState.mFlags.mSpecialHeightReflow)
doReflowChild = false;
}
else if ((NS_UNCONSTRAINEDSIZE != aReflowState.AvailableHeight())) {
// We don't reflow a rowspan >1 cell here with a constrained height.
// That happens in nsTableRowGroupFrame::SplitSpanningCells.
if (aTableFrame.GetEffectiveRowSpan(*cellFrame) > 1) {
doReflowChild = false;
}
}
if (aReflowState.mFlags.mSpecialHeightReflow) {
if (!isPaginated && !(cellFrame->GetStateBits() &
NS_FRAME_CONTAINS_RELATIVE_HEIGHT)) {
continue;
}
}
int32_t cellColIndex;
cellFrame->GetColIndex(cellColIndex);
cellColSpan = aTableFrame.GetEffectiveColSpan(*cellFrame);
// If the adjacent cell is in a prior row (because of a rowspan) add in the space
if ((iter.IsLeftToRight() && (prevColIndex != (cellColIndex - 1))) ||
(!iter.IsLeftToRight() && (prevColIndex != cellColIndex + cellColSpan))) {
x += GetSpaceBetween(prevColIndex, cellColIndex, cellColSpan, aTableFrame,
iter.IsLeftToRight(), false);
}
// remember the rightmost (ltr) or leftmost (rtl) column this cell spans into
prevColIndex = (iter.IsLeftToRight()) ? cellColIndex + (cellColSpan - 1) : cellColIndex;
// Reflow the child frame
nsRect kidRect = kidFrame->GetRect();
nsRect kidVisualOverflow = kidFrame->GetVisualOverflowRect();
bool firstReflow =
(kidFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) != 0;
if (doReflowChild) {
// Calculate the available width for the table cell using the known column widths
nscoord availCellWidth =
CalcAvailWidth(aTableFrame, *cellFrame);
nsHTMLReflowMetrics desiredSize(aReflowState);
// If the avail width is not the same as last time we reflowed the cell or
// the cell wants to be bigger than what was available last time or
// it is a style change reflow or we are printing, then we must reflow the
// cell. Otherwise we can skip the reflow.
// XXXldb Why is this condition distinct from doReflowChild above?
WritingMode rowWM = aReflowState.GetWritingMode();
WritingMode cellWM = cellFrame->GetWritingMode();
LogicalSize cellDesiredSize = cellFrame->GetDesiredSize();
if ((availCellWidth != cellFrame->GetPriorAvailWidth()) ||
(cellDesiredSize.ISize(cellWM) > cellFrame->GetPriorAvailWidth()) ||
(GetStateBits() & NS_FRAME_IS_DIRTY) ||
isPaginated ||
NS_SUBTREE_DIRTY(cellFrame) ||
// See if it needs a special reflow, or if it had one that we need to undo.
(cellFrame->GetStateBits() & NS_FRAME_CONTAINS_RELATIVE_HEIGHT) ||
HasPctHeight()) {
// Reflow the cell to fit the available width, height
// XXX The old IR_ChildIsDirty code used availCellWidth here.
nsSize kidAvailSize(availCellWidth, aReflowState.AvailableHeight());
// Reflow the child
nsTableCellReflowState
kidReflowState(aPresContext, aReflowState, kidFrame,
LogicalSize(kidFrame->GetWritingMode(),
kidAvailSize),
nsHTMLReflowState::CALLER_WILL_INIT);
InitChildReflowState(*aPresContext, kidAvailSize, borderCollapse,
kidReflowState);
nsReflowStatus status;
ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState,
x, 0, 0, status);
// allow the table to determine if/how the table needs to be rebalanced
// If any of the cells are not complete, then we're not complete
if (NS_FRAME_IS_NOT_COMPLETE(status)) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
}
else {
if (x != kidRect.x) {
kidFrame->InvalidateFrameSubtree();
}
desiredSize.SetSize(cellWM, cellDesiredSize);
desiredSize.mOverflowAreas = cellFrame->GetOverflowAreas();
// if we are in a floated table, our position is not yet established, so we cannot reposition our views
// the containing block will do this for us after positioning the table
if (!aTableFrame.IsFloating()) {
// Because we may have moved the frame we need to make sure any views are
// positioned properly. We have to do this, because any one of our parent
// frames could have moved and we have no way of knowing...
nsTableFrame::RePositionViews(kidFrame);
}
}
if (NS_UNCONSTRAINEDSIZE == aReflowState.AvailableHeight()) {
if (!GetPrevInFlow()) {
// Calculate the cell's actual height given its pass2 height. This
// function takes into account the specified height (in the style)
CalculateCellActualHeight(cellFrame, desiredSize.Height());
}
// height may have changed, adjust descent to absorb any excess difference
nscoord ascent;
if (!kidFrame->GetFirstPrincipalChild()->GetFirstPrincipalChild()) {
ascent = desiredSize.BSize(rowWM);
} else {
ascent = ((nsTableCellFrame *)kidFrame)->GetCellBaseline();
}
nscoord descent = desiredSize.BSize(rowWM) - ascent;
UpdateHeight(desiredSize.BSize(rowWM), ascent, descent, &aTableFrame, cellFrame);
}
else {
cellMaxHeight = std::max(cellMaxHeight, desiredSize.Height());
int32_t rowSpan = aTableFrame.GetEffectiveRowSpan((nsTableCellFrame&)*kidFrame);
if (1 == rowSpan) {
SetContentHeight(cellMaxHeight);
}
}
// Place the child
desiredSize.ISize(rowWM) = availCellWidth;
FinishReflowChild(kidFrame, aPresContext, desiredSize, nullptr, x, 0, 0);
nsTableFrame::InvalidateTableFrame(kidFrame, kidRect, kidVisualOverflow,
firstReflow);
x += desiredSize.Width();
}
else {
if (kidRect.x != x) {
// Invalidate the old position
kidFrame->InvalidateFrameSubtree();
// move to the new position
kidFrame->SetPosition(nsPoint(x, kidRect.y));
nsTableFrame::RePositionViews(kidFrame);
// invalidate the new position
kidFrame->InvalidateFrameSubtree();
}
// we need to account for the cell's width even if it isn't reflowed
x += kidRect.width;
if (kidFrame->GetNextInFlow()) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
}
ConsiderChildOverflow(aDesiredSize.mOverflowAreas, kidFrame);
x += aTableFrame.GetCellSpacingX(cellColIndex);
}
// just set our width to what was available. The table will calculate the width and not use our value.
aDesiredSize.Width() = aReflowState.AvailableWidth();
if (aReflowState.mFlags.mSpecialHeightReflow) {
aDesiredSize.Height() = mRect.height;
}
else if (NS_UNCONSTRAINEDSIZE == aReflowState.AvailableHeight()) {
aDesiredSize.Height() = CalcHeight(aReflowState);
if (GetPrevInFlow()) {
nscoord height = CalcHeightFromUnpaginatedHeight(aPresContext, *this);
aDesiredSize.Height() = std::max(aDesiredSize.Height(), height);
}
else {
if (isPaginated && HasStyleHeight()) {