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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 */
#ifndef nsTableRowFrame_h__
#define nsTableRowFrame_h__
#include "mozilla/Attributes.h"
#include "nscore.h"
#include "nsContainerFrame.h"
#include "nsTableRowGroupFrame.h"
#include "mozilla/WritingModes.h"
class nsTableCellFrame;
namespace mozilla {
class PresShell;
struct TableCellReflowInput;
} // namespace mozilla
* nsTableRowFrame is the frame that maps table rows
* (HTML tag TR). This class cannot be reused
* outside of an nsTableRowGroupFrame. It assumes that its parent is an
* nsTableRowGroupFrame, and its children are nsTableCellFrames.
* @see nsTableFrame
* @see nsTableRowGroupFrame
* @see nsTableCellFrame
class nsTableRowFrame : public nsContainerFrame {
using TableCellReflowInput = mozilla::TableCellReflowInput;
virtual ~nsTableRowFrame();
virtual void Init(nsIContent* aContent, nsContainerFrame* aParent,
nsIFrame* aPrevInFlow) override;
virtual void DestroyFrom(nsIFrame* aDestructRoot,
PostDestroyData& aPostDestroyData) override;
/** @see nsIFrame::DidSetComputedStyle */
virtual void DidSetComputedStyle(ComputedStyle* aOldComputedStyle) override;
virtual void AppendFrames(ChildListID aListID,
nsFrameList& aFrameList) override;
virtual void InsertFrames(ChildListID aListID, nsIFrame* aPrevFrame,
const nsLineList::iterator* aPrevFrameLine,
nsFrameList& aFrameList) override;
virtual void RemoveFrame(ChildListID aListID, nsIFrame* aOldFrame) override;
/** instantiate a new instance of nsTableRowFrame.
* @param aPresShell the pres shell for this frame
* @return the frame that was created
friend nsTableRowFrame* NS_NewTableRowFrame(mozilla::PresShell* aPresShell,
ComputedStyle* aStyle);
nsTableRowGroupFrame* GetTableRowGroupFrame() const {
nsIFrame* parent = GetParent();
MOZ_ASSERT(parent && parent->IsTableRowGroupFrame());
return static_cast<nsTableRowGroupFrame*>(parent);
nsTableFrame* GetTableFrame() const {
return GetTableRowGroupFrame()->GetTableFrame();
virtual nsMargin GetUsedMargin() const override;
virtual nsMargin GetUsedBorder() const override;
virtual nsMargin GetUsedPadding() const override;
virtual void BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists) override;
void PaintCellBackgroundsForFrame(nsIFrame* aFrame,
nsDisplayListBuilder* aBuilder,
const nsDisplayListSet& aLists,
const nsPoint& aOffset = nsPoint());
// Implemented in nsTableCellFrame.h, because it needs to know about the
// nsTableCellFrame class, but we can't include nsTableCellFrame.h here.
inline nsTableCellFrame* GetFirstCell() const;
/** calls Reflow for all of its child cells.
* Cells with rowspan=1 are all set to the same height and stacked
* horizontally.
* Cells are not split unless absolutely necessary.
* Cells are resized in nsTableFrame::BalanceColumnWidths and
* nsTableFrame::ShrinkWrapChildren
* @param aDesiredSize width set to width of the sum of the cells,
* height set to height of cells with rowspan=1.
* @see nsIFrame::Reflow
* @see nsTableFrame::BalanceColumnWidths
* @see nsTableFrame::ShrinkWrapChildren
virtual void Reflow(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsReflowStatus& aStatus) override;
void DidResize();
virtual nsresult GetFrameName(nsAString& aResult) const override;
void UpdateBSize(nscoord aBSize, nscoord aAscent, nscoord aDescent,
nsTableFrame* aTableFrame = nullptr,
nsTableCellFrame* aCellFrame = nullptr);
void ResetBSize(nscoord aRowStyleBSize);
// calculate the bsize, considering content bsize of the
// cells and the style bsize of the row and cells, excluding pct bsizes
nscoord CalcBSize(const ReflowInput& aReflowInput);
// Support for cells with 'vertical-align: baseline'.
* returns the max-ascent amongst all the cells that have
* 'vertical-align: baseline', *including* cells with rowspans.
* returns 0 if we don't have any cell with 'vertical-align: baseline'
nscoord GetMaxCellAscent() const;
/* return the row ascent
nscoord GetRowBaseline(mozilla::WritingMode aWritingMode);
/** returns the ordinal position of this row in its table */
virtual int32_t GetRowIndex() const;
/** set this row's starting row index */
void SetRowIndex(int aRowIndex);
// See nsTableFrame.h
int32_t GetAdjustmentForStoredIndex(int32_t aStoredIndex) const;
// See nsTableFrame.h
void AddDeletedRowIndex();
/** used by row group frame code */
nscoord ReflowCellFrame(nsPresContext* aPresContext,
const ReflowInput& aReflowInput, bool aIsTopOfPage,
nsTableCellFrame* aCellFrame, nscoord aAvailableBSize,
nsReflowStatus& aStatus);
* Collapse the row if required, apply col and colgroup visibility: collapse
* info to the cells in the row.
* @return the amount to shift bstart-wards all following rows
* @param aRowOffset - shift the row bstart-wards by this amount
* @param aISize - new isize of the row
* @param aCollapseGroup - parent rowgroup is collapsed so this row needs
* to be collapsed
* @param aDidCollapse - the row has been collapsed
nscoord CollapseRowIfNecessary(nscoord aRowOffset, nscoord aISize,
bool aCollapseGroup, bool& aDidCollapse);
* Insert a cell frame after the last cell frame that has a col index
* that is less than aColIndex. If no such cell frame is found the
* frame to insert is prepended to the child list.
* @param aFrame the cell frame to insert
* @param aColIndex the col index
void InsertCellFrame(nsTableCellFrame* aFrame, int32_t aColIndex);
nsresult CalculateCellActualBSize(nsTableCellFrame* aCellFrame,
nscoord& aDesiredBSize,
mozilla::WritingMode aWM);
bool IsFirstInserted() const;
void SetFirstInserted(bool aValue);
nscoord GetContentBSize() const;
void SetContentBSize(nscoord aTwipValue);
bool HasStyleBSize() const;
bool HasFixedBSize() const;
void SetHasFixedBSize(bool aValue);
bool HasPctBSize() const;
void SetHasPctBSize(bool aValue);
nscoord GetFixedBSize() const;
void SetFixedBSize(nscoord aValue);
float GetPctBSize() const;
void SetPctBSize(float aPctValue, bool aForce = false);
nscoord GetInitialBSize(nscoord aBasis = 0) const;
nsTableRowFrame* GetNextRow() const;
bool HasUnpaginatedBSize();
void SetHasUnpaginatedBSize(bool aValue);
nscoord GetUnpaginatedBSize();
void SetUnpaginatedBSize(nsPresContext* aPresContext, nscoord aValue);
BCPixelSize GetBStartBCBorderWidth() const { return mBStartBorderWidth; }
BCPixelSize GetBEndBCBorderWidth() const { return mBEndBorderWidth; }
void SetBStartBCBorderWidth(BCPixelSize aWidth) {
mBStartBorderWidth = aWidth;
void SetBEndBCBorderWidth(BCPixelSize aWidth) { mBEndBorderWidth = aWidth; }
mozilla::LogicalMargin GetBCBorderWidth(mozilla::WritingMode aWM);
* Gets inner border widths before collapsing with cell borders
* Caller must get block-end border from next row or from table
* GetContinuousBCBorderWidth will not overwrite that border
* see nsTablePainter about continuous borders
void GetContinuousBCBorderWidth(mozilla::WritingMode aWM,
mozilla::LogicalMargin& aBorder);
* @returns outer block-start bc border == prev row's block-end inner
nscoord GetOuterBStartContBCBorderWidth();
* Sets full border widths before collapsing with cell borders
* @param aForSide - side to set; only accepts iend, istart, and bstart
void SetContinuousBCBorderWidth(mozilla::LogicalSide aForSide,
BCPixelSize aPixelValue);
virtual bool IsFrameOfType(uint32_t aFlags) const override {
if (aFlags & (eSupportsContainLayoutAndPaint | eSupportsAspectRatio)) {
return false;
return nsContainerFrame::IsFrameOfType(aFlags & ~(nsIFrame::eTablePart));
virtual void InvalidateFrame(uint32_t aDisplayItemKey = 0,
bool aRebuildDisplayItems = true) override;
virtual void InvalidateFrameWithRect(
const nsRect& aRect, uint32_t aDisplayItemKey = 0,
bool aRebuildDisplayItems = true) override;
virtual void InvalidateFrameForRemoval() override {
virtual mozilla::a11y::AccType AccessibleType() override;
/** protected constructor.
* @see NewFrame
explicit nsTableRowFrame(ComputedStyle* aStyle, nsPresContext* aPresContext,
ClassID aID = kClassID);
void InitChildReflowInput(nsPresContext& aPresContext,
const mozilla::LogicalSize& aAvailSize,
bool aBorderCollapse,
TableCellReflowInput& aReflowInput);
LogicalSides GetLogicalSkipSides() const override;
// row-specific methods
nscoord ComputeCellXOffset(const ReflowInput& aState, nsIFrame* aKidFrame,
const nsMargin& aKidMargin) const;
* Called for incremental/dirty and resize reflows. If aDirtyOnly is true then
* only reflow dirty cells.
void ReflowChildren(nsPresContext* aPresContext, ReflowOutput& aDesiredSize,
const ReflowInput& aReflowInput,
nsTableFrame& aTableFrame, nsReflowStatus& aStatus);
struct RowBits {
unsigned mRowIndex : 29;
unsigned mHasFixedBSize : 1; // set if the dominating style bsize on the
// row or any cell is pixel based
unsigned mHasPctBSize : 1; // set if the dominating style bsize on the row
// or any cell is pct based
unsigned mFirstInserted : 1; // if true, then it was the bstart-most newly
// inserted row
} mBits;
// the desired bsize based on the content of the tallest cell in the row
nscoord mContentBSize;
// the bsize based on a style percentage bsize on either the row or any cell
// if mHasPctBSize is set
nscoord mStylePctBSize;
// the bsize based on a style pixel bsize on the row or any
// cell if mHasFixedBSize is set
nscoord mStyleFixedBSize;
// max-ascent and max-descent amongst all cells that have
// 'vertical-align: baseline'
nscoord mMaxCellAscent; // does include cells with rowspan > 1
nscoord mMaxCellDescent; // does *not* include cells with rowspan > 1
// border widths in pixels in the collapsing border model of the *inner*
// half of the border only
BCPixelSize mBStartBorderWidth;
BCPixelSize mBEndBorderWidth;
BCPixelSize mIEndContBorderWidth;
BCPixelSize mBStartContBorderWidth;
BCPixelSize mIStartContBorderWidth;
* Sets the NS_ROW_HAS_CELL_WITH_STYLE_BSIZE bit to indicate whether
* this row has any cells that have non-auto-bsize. (Row-spanning
* cells are ignored.)
void InitHasCellWithStyleBSize(nsTableFrame* aTableFrame);
inline int32_t nsTableRowFrame::GetAdjustmentForStoredIndex(
int32_t aStoredIndex) const {
nsTableRowGroupFrame* parentFrame = GetTableRowGroupFrame();
return parentFrame->GetAdjustmentForStoredIndex(aStoredIndex);
inline void nsTableRowFrame::AddDeletedRowIndex() {
nsTableRowGroupFrame* parentFrame = GetTableRowGroupFrame();
inline int32_t nsTableRowFrame::GetRowIndex() const {
int32_t storedRowIndex = int32_t(mBits.mRowIndex);
int32_t rowIndexAdjustment = GetAdjustmentForStoredIndex(storedRowIndex);
return (storedRowIndex - rowIndexAdjustment);
inline void nsTableRowFrame::SetRowIndex(int aRowIndex) {
// Note: Setting the index of a row (as in the case of adding new rows) should
// be preceded by a call to nsTableFrame::RecalculateRowIndices()
// so as to correctly clear mDeletedRowIndexRanges.
"mDeletedRowIndexRanges should be empty here!");
mBits.mRowIndex = aRowIndex;
inline bool nsTableRowFrame::IsFirstInserted() const {
return bool(mBits.mFirstInserted);
inline void nsTableRowFrame::SetFirstInserted(bool aValue) {
mBits.mFirstInserted = aValue;
inline bool nsTableRowFrame::HasStyleBSize() const {
return (bool)mBits.mHasFixedBSize || (bool)mBits.mHasPctBSize;
inline bool nsTableRowFrame::HasFixedBSize() const {
return (bool)mBits.mHasFixedBSize;
inline void nsTableRowFrame::SetHasFixedBSize(bool aValue) {
mBits.mHasFixedBSize = aValue;
inline bool nsTableRowFrame::HasPctBSize() const {
return (bool)mBits.mHasPctBSize;
inline void nsTableRowFrame::SetHasPctBSize(bool aValue) {
mBits.mHasPctBSize = aValue;
inline nscoord nsTableRowFrame::GetContentBSize() const {
return mContentBSize;
inline void nsTableRowFrame::SetContentBSize(nscoord aValue) {
mContentBSize = aValue;
inline nscoord nsTableRowFrame::GetFixedBSize() const {
if (mBits.mHasFixedBSize) {
return mStyleFixedBSize;
return 0;
inline float nsTableRowFrame::GetPctBSize() const {
if (mBits.mHasPctBSize) {
return (float)mStylePctBSize / 100.0f;
return 0.0f;
inline bool nsTableRowFrame::HasUnpaginatedBSize() {
inline void nsTableRowFrame::SetHasUnpaginatedBSize(bool aValue) {
if (aValue) {
} else {
inline mozilla::LogicalMargin nsTableRowFrame::GetBCBorderWidth(
mozilla::WritingMode aWM) {
nsPresContext* presContext = PresContext();
return mozilla::LogicalMargin(
aWM, presContext->DevPixelsToAppUnits(mBStartBorderWidth), 0,
presContext->DevPixelsToAppUnits(mBEndBorderWidth), 0);
inline void nsTableRowFrame::GetContinuousBCBorderWidth(
mozilla::WritingMode aWM, mozilla::LogicalMargin& aBorder) {
int32_t d2a = PresContext()->AppUnitsPerDevPixel();
aBorder.IEnd(aWM) = BC_BORDER_START_HALF_COORD(d2a, mIStartContBorderWidth);
aBorder.BStart(aWM) = BC_BORDER_END_HALF_COORD(d2a, mBStartContBorderWidth);
aBorder.IStart(aWM) = BC_BORDER_END_HALF_COORD(d2a, mIEndContBorderWidth);
inline nscoord nsTableRowFrame::GetOuterBStartContBCBorderWidth() {
int32_t aPixelsToTwips = mozilla::AppUnitsPerCSSPixel();
return BC_BORDER_START_HALF_COORD(aPixelsToTwips, mBStartContBorderWidth);