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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 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsCOMPtr.h"
#include "nsTableRowGroupFrame.h"
#include "nsTableRowFrame.h"
#include "nsTableFrame.h"
#include "nsTableCellFrame.h"
#include "nsIRenderingContext.h"
#include "nsIPresContext.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIContent.h"
#include "nsIView.h"
#include "nsIReflowCommand.h"
#include "nsHTMLIIDs.h"
#include "nsIDeviceContext.h"
#include "nsHTMLAtoms.h"
#include "nsIStyleSet.h"
#include "nsIPresShell.h"
#include "nsLayoutAtoms.h"
#include "nsCSSRendering.h"
#include "nsHTMLParts.h"
#include "nsCellMap.h"//table cell navigation
nsTableRowGroupFrame::nsTableRowGroupFrame()
{
SetRepeatable(PR_FALSE);
#ifdef DEBUG_TABLE_REFLOW_TIMING
mTimer = new nsReflowTimer(this);
#endif
}
nsTableRowGroupFrame::~nsTableRowGroupFrame()
{
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugReflowDone(this);
#endif
}
/* ----------- nsTableRowGroupFrame ---------- */
nsrefcnt nsTableRowGroupFrame::AddRef(void)
{
return 1;//implementation of nsLineIterator
}
nsrefcnt nsTableRowGroupFrame::Release(void)
{
return 1;//implementation of nsLineIterator
}
nsresult
nsTableRowGroupFrame::QueryInterface(const nsIID& aIID, void** aInstancePtr)
{
if (NULL == aInstancePtr) {
return NS_ERROR_NULL_POINTER;
}
static NS_DEFINE_IID(kITableRowGroupIID, NS_ITABLEROWGROUPFRAME_IID);
if (aIID.Equals(kITableRowGroupIID)) {
*aInstancePtr = (void*)this;
return NS_OK;
}
else if (aIID.Equals(NS_GET_IID(nsILineIteratorNavigator)))
{ // note there is no addref here, frames are not addref'd
*aInstancePtr = (void*)(nsILineIteratorNavigator*)this;
return NS_OK;
}
else {
return nsHTMLContainerFrame::QueryInterface(aIID, aInstancePtr);
}
}
NS_IMETHODIMP
nsTableRowGroupFrame::IsPercentageBase(PRBool& aBase) const
{
aBase = PR_TRUE;
return NS_OK;
}
PRInt32
nsTableRowGroupFrame::GetRowCount()
{
PRInt32 count = 0; // init return
// loop through children, adding one to aCount for every legit row
nsIFrame* childFrame = GetFirstFrame();
while (PR_TRUE) {
if (!childFrame)
break;
const nsStyleDisplay* childDisplay;
childFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)childDisplay));
if (NS_STYLE_DISPLAY_TABLE_ROW == childDisplay->mDisplay)
count++;
GetNextFrame(childFrame, &childFrame);
}
return count;
}
PRInt32 nsTableRowGroupFrame::GetStartRowIndex()
{
PRInt32 result = -1;
nsIFrame* childFrame = GetFirstFrame();
while (PR_TRUE) {
if (!childFrame)
break;
const nsStyleDisplay *childDisplay;
childFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)childDisplay));
if (NS_STYLE_DISPLAY_TABLE_ROW == childDisplay->mDisplay) {
result = ((nsTableRowFrame *)childFrame)->GetRowIndex();
break;
}
GetNextFrame(childFrame, &childFrame);
}
// if the row group doesn't have any children, get it the hard way
if (-1 == result) {
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
if (tableFrame) {
return tableFrame->GetStartRowIndex(*this);
}
}
return result;
}
nsresult
nsTableRowGroupFrame::InitRepeatedFrame(nsIPresContext* aPresContext,
nsTableRowGroupFrame* aHeaderFooterFrame)
{
nsIFrame* originalRowFrame;
nsIFrame* copyRowFrame = GetFirstFrame();
aHeaderFooterFrame->FirstChild(aPresContext, nsnull, &originalRowFrame);
while (copyRowFrame) {
// Set the row frame index
int rowIndex = ((nsTableRowFrame*)originalRowFrame)->GetRowIndex();
((nsTableRowFrame*)copyRowFrame)->SetRowIndex(rowIndex);
// For each table cell frame set its column index
nsIFrame* originalCellFrame;
nsIFrame* copyCellFrame;
originalRowFrame->FirstChild(aPresContext, nsnull, &originalCellFrame);
copyRowFrame->FirstChild(aPresContext, nsnull, &copyCellFrame);
while (copyCellFrame) {
nsIAtom* frameType;
copyCellFrame->GetFrameType(&frameType);
if (nsLayoutAtoms::tableCellFrame == frameType) {
#ifdef NS_DEBUG
nsIContent* content1;
nsIContent* content2;
originalCellFrame->GetContent(&content1);
copyCellFrame->GetContent(&content2);
NS_ASSERTION(content1 == content2, "cell frames have different content");
NS_IF_RELEASE(content1);
NS_IF_RELEASE(content2);
#endif
PRInt32 colIndex;
((nsTableCellFrame*)originalCellFrame)->GetColIndex(colIndex);
((nsTableCellFrame*)copyCellFrame)->InitCellFrame(colIndex);
}
NS_IF_RELEASE(frameType);
// Move to the next cell frame
copyCellFrame->GetNextSibling(&copyCellFrame);
originalCellFrame->GetNextSibling(&originalCellFrame);
}
// Move to the next row frame
GetNextFrame(originalRowFrame, &originalRowFrame);
GetNextFrame(copyRowFrame, &copyRowFrame);
}
return NS_OK;
}
NS_METHOD nsTableRowGroupFrame::Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
PRBool isVisible;
if (NS_SUCCEEDED(IsVisibleForPainting(aPresContext, aRenderingContext, PR_FALSE, &isVisible)) && !isVisible) {
return NS_OK;
}
nsCompatibility mode;
aPresContext->GetCompatibilityMode(&mode);
if ((NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) &&
(eCompatibility_Standard == mode)) {
const nsStyleVisibility* vis =
(const nsStyleVisibility*)mStyleContext->GetStyleData(eStyleStruct_Visibility);
if (vis->IsVisibleOrCollapsed()) {
const nsStyleBorder* border =
(const nsStyleBorder*)mStyleContext->GetStyleData(eStyleStruct_Border);
const nsStyleBackground* color =
(const nsStyleBackground*)mStyleContext->GetStyleData(eStyleStruct_Background);
nsRect rect(0,0,mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *border, 0, 0);
}
}
#ifdef DEBUG
// for debug...
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) && GetShowFrameBorders()) {
aRenderingContext.SetColor(NS_RGB(0,255,0));
aRenderingContext.DrawRect(0, 0, mRect.width, mRect.height);
}
#endif
if ((NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) &&
(eCompatibility_Standard == mode)) {
// paint the backgrouds of the rows, skipping the cells
nsIFrame* kid = mFrames.FirstChild();
while (kid) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid, aWhichLayer, NS_ROW_FRAME_PAINT_SKIP_CELLS);
kid->GetNextSibling(&kid);
}
// paint the backgrounds of the cells and their descendants, skipping the rows
kid = mFrames.FirstChild();
while (kid) {
PaintChild(aPresContext, aRenderingContext, aDirtyRect, kid, aWhichLayer, NS_ROW_FRAME_PAINT_SKIP_ROW);
kid->GetNextSibling(&kid);
}
}
else {
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
}
return NS_OK;
/*nsFrame::Paint(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);*/
}
PRIntn
nsTableRowGroupFrame::GetSkipSides() const
{
PRIntn skip = 0;
if (nsnull != mPrevInFlow) {
skip |= 1 << NS_SIDE_TOP;
}
if (nsnull != mNextInFlow) {
skip |= 1 << NS_SIDE_BOTTOM;
}
return skip;
}
// aDirtyRect is in our coordinate system
// child rect's are also in our coordinate system
// overloaded method from nsContainerFrame. The difference is that
// we don't want to clip our children, so a cell can do a rowspan
void nsTableRowGroupFrame::PaintChildren(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer,
PRUint32 aFlags)
{
nsIFrame* kid = GetFirstFrame();
while (nsnull != kid) {
nsIView *pView;
kid->GetView(aPresContext, &pView);
if (nsnull == pView) {
PRBool clipState;
nsRect kidRect;
kid->GetRect(kidRect);
nsRect damageArea(aDirtyRect);
// Translate damage area into kid's coordinate system
nsRect kidDamageArea(damageArea.x - kidRect.x, damageArea.y - kidRect.y,
damageArea.width, damageArea.height);
aRenderingContext.PushState();
aRenderingContext.Translate(kidRect.x, kidRect.y);
kid->Paint(aPresContext, aRenderingContext, kidDamageArea, aWhichLayer);
#ifdef DEBUG
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) &&
GetShowFrameBorders()) {
aRenderingContext.SetColor(NS_RGB(255,0,0));
aRenderingContext.DrawRect(0, 0, kidRect.width, kidRect.height);
}
#endif
aRenderingContext.PopState(clipState);
}
GetNextFrame(kid, &kid);
}
}
NS_IMETHODIMP
nsTableRowGroupFrame::GetFrameForPoint(nsIPresContext* aPresContext,
const nsPoint& aPoint,
nsFramePaintLayer aWhichLayer,
nsIFrame** aFrame)
{
// this should act like a block, so we need to override
return GetFrameForPointUsing(aPresContext, aPoint, nsnull, aWhichLayer, (aWhichLayer == NS_FRAME_PAINT_LAYER_BACKGROUND), aFrame);
}
// Position and size aKidFrame and update our reflow state. The origin of
// aKidRect is relative to the upper-left origin of our frame
void
nsTableRowGroupFrame::PlaceChild(nsIPresContext* aPresContext,
nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame,
nsHTMLReflowMetrics& aDesiredSize)
{
// Place and size the child
FinishReflowChild(aKidFrame, aPresContext, aDesiredSize, 0, aReflowState.y, 0);
// Adjust the running y-offset
aReflowState.y += aDesiredSize.height;
// If our height is constrained then update the available height
if (NS_UNCONSTRAINEDSIZE != aReflowState.availSize.height) {
aReflowState.availSize.height -= aDesiredSize.height;
}
}
// Reflow the frames we've already created. If aDirtyOnly is set then only
// reflow dirty frames. This assumes that all of the dirty frames are contiguous.
NS_METHOD
nsTableRowGroupFrame::ReflowChildren(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableRowFrame* aStartFrame,
PRBool aDirtyOnly,
nsTableRowFrame** aFirstRowReflowed)
{
nsTableFrame* tableFrame = nsnull;
nsresult rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (NS_FAILED(rv) || !tableFrame) return rv;
nscoord cellSpacingY = tableFrame->GetCellSpacingY();
PRBool isPaginated;
aPresContext->IsPaginated(&isPaginated);
if (aFirstRowReflowed) {
*aFirstRowReflowed = nsnull;
}
nsIFrame* lastReflowedRow = nsnull;
PRBool adjustSiblings = PR_TRUE;
nsIFrame* kidFrame = (aStartFrame) ? aStartFrame : mFrames.FirstChild();
nsTableFrame* tableFirstInFlow = (nsTableFrame*)tableFrame->GetFirstInFlow();
for ( ; kidFrame; kidFrame->GetNextSibling(&kidFrame)) {
// Get the frame state bits
nsCOMPtr<nsIAtom> kidType;
kidFrame->GetFrameType(getter_AddRefs(kidType));
nsFrameState frameState;
kidFrame->GetFrameState(&frameState);
// See if we should only reflow the dirty child frames
PRBool doReflowChild = PR_TRUE;
if (aDirtyOnly && ((frameState & NS_FRAME_IS_DIRTY) == 0)) {
doReflowChild = PR_FALSE;
}
if (aReflowState.reflowState.mFlags.mSpecialTableReflow) {
if (!isPaginated && (nsLayoutAtoms::tableRowFrame == kidType.get() &&
!((nsTableRowFrame*)kidFrame)->NeedSpecialReflow())) {
doReflowChild = PR_FALSE;
}
}
// Reflow the row frame
if (doReflowChild) {
nsSize kidAvailSize(aReflowState.availSize);
if (0 >= kidAvailSize.height)
kidAvailSize.height = 1; // XXX: HaCk - we don't handle negative heights yet
nsHTMLReflowMetrics desiredSize(nsnull);
desiredSize.width = desiredSize.height = desiredSize.ascent = desiredSize.descent = 0;
// Reflow the child into the available space, giving it as much height as
// it wants. We'll deal with splitting later after we've computed the row
// heights, taking into account cells with row spans...
kidAvailSize.height = NS_UNCONSTRAINEDSIZE;
// If the incremental reflow command is a StyleChanged reflow and
// it's target is the current frame, then make sure we send
// StyleChange reflow reasons down to the children so that they
// don't over-optimize their reflow.
nsIFrame* target = nsnull;
nsReflowReason reason = aReflowState.reason;
if (eReflowReason_Incremental == aReflowState.reason) {
aReflowState.reflowState.reflowCommand->GetTarget(target);
if (this == target) {
nsIReflowCommand::ReflowType type;
aReflowState.reflowState.reflowCommand->GetType(type);
if (nsIReflowCommand::StyleChanged == type) {
reason = eReflowReason_StyleChange;
}
}
}
if (frameState & NS_FRAME_FIRST_REFLOW) {
reason = eReflowReason_Initial;
}
nsHTMLReflowState kidReflowState(aPresContext, aReflowState.reflowState, kidFrame,
kidAvailSize, reason);
// If this isn't the first row frame, then we can't be at the top of
// the page anymore...
if (kidFrame != GetFirstFrame()) {
kidReflowState.isTopOfPage = PR_FALSE;
}
rv = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState,
0, aReflowState.y, 0, aStatus);
// Place the child
nsRect kidRect (0, aReflowState.y, desiredSize.width, desiredSize.height);
PlaceChild(aPresContext, aReflowState, kidFrame, desiredSize);
aReflowState.y += cellSpacingY;
lastReflowedRow = kidFrame;
if (aFirstRowReflowed && !*aFirstRowReflowed) {
if (nsLayoutAtoms::tableRowFrame == kidType.get()) {
*aFirstRowReflowed = (nsTableRowFrame*)kidFrame;
}
}
} else {
// were done reflowing, so see if we need to reposition the rows that follow
if (lastReflowedRow) {
if (tableFrame->NeedsReflow(aReflowState.reflowState)) {
adjustSiblings = PR_FALSE;
break; // don't bother if the table will reflow everything.
}
}
// Adjust the running y-offset so we know where the next row should be placed
nsSize kidSize;
kidFrame->GetSize(kidSize);
aReflowState.y += kidSize.height + cellSpacingY;
}
}
// adjust the rows after the ones that were reflowed
if (lastReflowedRow && adjustSiblings) {
nsIFrame* nextRow = nsnull;
lastReflowedRow->GetNextSibling(&nextRow);
if (nextRow) {
nsRect lastReflowedRect, nextRect;
lastReflowedRow->GetRect(lastReflowedRect);
nextRow->GetRect(nextRect);
nscoord deltaY = cellSpacingY + lastReflowedRect.YMost() - nextRect.y;
if (deltaY != 0) {
AdjustSiblingsAfterReflow(aPresContext, aReflowState, lastReflowedRow, deltaY);
}
}
}
return rv;
}
nsTableRowFrame*
nsTableRowGroupFrame::GetFirstRow()
{
nsIFrame* childFrame = GetFirstFrame();
while (childFrame) {
nsCOMPtr<nsIAtom> frameType;
childFrame->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::tableRowFrame == frameType.get()) {
return (nsTableRowFrame*)childFrame;
}
childFrame->GetNextSibling(&childFrame);
}
return nsnull;
}
struct RowInfo {
RowInfo() { height = pctHeight = hasStyleHeight = hasPctHeight = isSpecial = 0; }
unsigned height; // content height or fixed height, excluding pct height
unsigned pctHeight:29; // pct height
unsigned hasStyleHeight:1;
unsigned hasPctHeight: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 height on the row
};
static void
UpdateHeights(RowInfo& aRowInfo,
nscoord aAdditionalHeight,
nscoord& aTotal,
nscoord& aUnconstrainedTotal)
{
aRowInfo.height += aAdditionalHeight;
aTotal += aAdditionalHeight;
if (!aRowInfo.hasStyleHeight) {
aUnconstrainedTotal += aAdditionalHeight;
}
}
void
nsTableRowGroupFrame::DidResizeRows(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsTableRowFrame* aStartRowFrameIn)
{
// update the cells spanning rows with their new heights
// this is the place where all of the cells in the row get set to the height of the row
PRInt32 rowIndex;
nsTableRowFrame* rowFrame;
nsTableRowFrame* startRowFrame = (aStartRowFrameIn) ? aStartRowFrameIn: GetFirstRow();
for (rowFrame = startRowFrame, rowIndex = 0; rowFrame; rowFrame = rowFrame->GetNextRow(), rowIndex++) {
rowFrame->DidResize(&aPresContext, aReflowState);
}
}
static PRBool
HasMoreThanOneCell(nsTableCellMap* aCellMap,
PRInt32 aRowIndex)
{
if (aCellMap) {
CellData* cellData;
PRInt32 colIndex = 0;
PRInt32 count = 0;
do {
cellData = aCellMap->GetCellAt(aRowIndex, colIndex);
if (cellData && (cellData->GetCellFrame() || cellData->IsRowSpan()))
count++;
if (count > 1)
return PR_TRUE;
colIndex++;
} while(cellData);
}
return PR_FALSE;
}
// This calculates the height of rows starting at aStartRowFrameIn and takes into account
// style height on the row group, style heights on rows and cells, style heights on rowspans.
// Actual row heights will be adjusted later if the table has a style height.
// Even if rows don't change height, this method must be called to set the heights of each
// cell in the row to the height of its row.
void
nsTableRowGroupFrame::CalculateRowHeights(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableRowFrame* aStartRowFrameIn)
{
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
if (!aPresContext || !tableFrame) return;
// all table cells have the same top and bottom margins, namely cellSpacingY
nscoord cellSpacingY = tableFrame->GetCellSpacingY();
float p2t;
aPresContext->GetPixelsToTwips(&p2t);
// find the nearest row at or before aStartRowFrameIn that isn't spanned into.
// If we have a computed height, then we can't compute the heights
// incrementally from aStartRowFrameIn, and we must start at the first row.
nsTableRowFrame* startRowFrame = GetFirstRow();
if (aStartRowFrameIn && (NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight)
&& (aReflowState.mComputedHeight > 0)) {
nsTableRowFrame* rowFrame = startRowFrame;
while (rowFrame) {
PRInt32 rowIndex = rowFrame->GetRowIndex();
if (!tableFrame->RowIsSpannedInto(rowIndex)) {
startRowFrame = rowFrame;
if (aStartRowFrameIn == startRowFrame)
break;
}
else if (aStartRowFrameIn == rowFrame)
break;
rowFrame = rowFrame->GetNextRow();
}
}
if (!startRowFrame) return;
PRInt32 startRowIndex = startRowFrame->GetRowIndex();
nsRect startRowRect;
startRowFrame->GetRect(startRowRect);
// the current row group height is the y origin of the 1st row we are about to calculated a height for
nscoord startRowGroupHeight = startRowRect.y;
PRInt32 numRows = GetRowCount() - (startRowFrame->GetRowIndex() - GetStartRowIndex());
// collect the current height of each row. nscoord* rowHeights = nsnull;
RowInfo* rowInfo;
if (numRows > 0) {
rowInfo = new RowInfo[numRows];
if (!rowInfo) return;
nsCRT::memset (rowInfo, 0, numRows*sizeof(RowInfo));
}
else return;
PRBool hasRowSpanningCell = PR_FALSE;
nscoord heightOfRows = 0;
nscoord heightOfUnStyledRows = 0;
// Get the height of each row without considering rowspans. This will be the max of
// the largest desired height of each cell, the largest style height of each cell,
// the style height of the row.
nscoord pctHeightBasis = GetHeightBasis(aReflowState);
PRInt32 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++) {
if (rowFrame->HasPctHeight()) {
rowInfo[rowIndex].hasPctHeight = PR_TRUE;
rowInfo[rowIndex].pctHeight = nsTableFrame::RoundToPixel(rowFrame->GetHeight(pctHeightBasis), p2t);
}
nscoord nonPctHeight = PR_MAX(rowFrame->GetContentHeight(), rowFrame->GetFixedHeight());
UpdateHeights(rowInfo[rowIndex], nonPctHeight, heightOfRows, heightOfUnStyledRows);
rowInfo[rowIndex].hasStyleHeight = rowFrame->HasStyleHeight();
if (!rowInfo[rowIndex].hasStyleHeight) {
if (HasMoreThanOneCell(tableFrame->GetCellMap(), rowIndex)) {
rowInfo[rowIndex].isSpecial = PR_TRUE;
// iteratate the row's cell frames to see if any do not have rowspan > 1
nsTableCellFrame* cellFrame = rowFrame->GetFirstCell();
while (cellFrame) {
PRInt32 rowSpan = tableFrame->GetEffectiveRowSpan(rowIndex + startRowIndex, *cellFrame);
if (1 == rowSpan) {
rowInfo[rowIndex].isSpecial = PR_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)) {
hasRowSpanningCell = PR_TRUE;
}
}
}
if (hasRowSpanningCell) {
// Get the height 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++) {
if (tableFrame->RowHasSpanningCells(startRowIndex + rowIndex)) {
nsTableCellFrame* cellFrame = rowFrame->GetFirstCell();
// iteratate the row's cell frames
while (cellFrame) {
PRInt32 rowSpan = tableFrame->GetEffectiveRowSpan(rowIndex + startRowIndex, *cellFrame);
if (rowSpan > 1) { // a cell with rowspan > 1, determine the height of the rows it spans
nscoord heightOfRowsSpanned = 0;
nscoord heightOfUnStyledRowsSpanned = 0;
nscoord numSpecialRowsSpanned = 0;
nscoord cellSpacingTotal = 0;
PRInt32 spanX;
for (spanX = 0; spanX < rowSpan; spanX++) {
heightOfRowsSpanned += rowInfo[rowIndex + spanX].height;
if (!rowInfo[rowIndex + spanX].hasStyleHeight) {
heightOfUnStyledRowsSpanned += rowInfo[rowIndex + spanX].height;
}
if (0 != spanX) {
cellSpacingTotal += cellSpacingY;
}
if (rowInfo[rowIndex + spanX].isSpecial) {
numSpecialRowsSpanned++;
}
}
nscoord heightOfAreaSpanned = heightOfRowsSpanned + cellSpacingTotal;
// get the height of the cell
nsSize cellFrameSize;
cellFrame->GetSize(cellFrameSize);
nsSize cellDesSize = cellFrame->GetDesiredSize();
rowFrame->CalculateCellActualSize(cellFrame, cellDesSize.width,
cellDesSize.height, cellDesSize.width);
cellFrameSize.height = cellDesSize.height;
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.height += rowFrame->GetMaxCellAscent() - cellFrame->GetDesiredAscent();
}
if (heightOfAreaSpanned < cellFrameSize.height) {
// the cell's height is larger than the available space of the rows it
// spans so distribute the excess height to the rows affected
nscoord extra = cellFrameSize.height - heightOfAreaSpanned;
nscoord extraUsed = 0;
if (0 == numSpecialRowsSpanned) {
//NS_ASSERTION(heightOfRowsSpanned > 0, "invalid row span situation");
PRBool haveUnStyledRowsSpanned = (heightOfUnStyledRowsSpanned > 0);
nscoord divisor = (haveUnStyledRowsSpanned)
? heightOfUnStyledRowsSpanned : heightOfRowsSpanned;
if (divisor > 0) {
for (spanX = rowSpan - 1; spanX >= 0; spanX--) {
if (!haveUnStyledRowsSpanned || !rowInfo[rowIndex + spanX].hasStyleHeight) {
// The amount of additional space each row gets is proportional to its height
float percent = ((float)rowInfo[rowIndex + spanX].height) / ((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 = PR_MIN(nsTableFrame::RoundToPixel(extraForRow, p2t), extra - extraUsed);
// update the row height
UpdateHeights(rowInfo[rowIndex + spanX], extraForRow, heightOfRows, heightOfUnStyledRows);
extraUsed += extraForRow;
if (extraUsed >= extra) {
NS_ASSERTION((extraUsed == extra), "invalid row height calculation");
break;
}
}
}
}
else {
// put everything in the last row
UpdateHeights(rowInfo[rowIndex + rowSpan - 1], extra, heightOfRows, heightOfUnStyledRows);
}
}
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 = PR_MIN(nsTableFrame::RoundToPixel(extraForRow, p2t), extra - extraUsed);
// update the row height
UpdateHeights(rowInfo[rowIndex + spanX], extraForRow, heightOfRows, heightOfUnStyledRows);
extraUsed += extraForRow;
if (extraUsed >= extra) {
NS_ASSERTION((extraUsed == extra), "invalid row height calculation");
break;
}
}
}
}
}
} // if (rowSpan > 1)
cellFrame = cellFrame->GetNextCell();
} // while (cellFrame)
} // if (tableFrame->RowHasSpanningCells(startRowIndex + rowIndex) {
} // while (rowFrame)
}
// pct height rows have already got their content heights. Give them their pct heights up to pctHeightBasis
nscoord extra = pctHeightBasis - heightOfRows;
for (rowFrame = startRowFrame, rowIndex = 0; rowFrame && (extra > 0); rowFrame = rowFrame->GetNextRow(), rowIndex++) {
RowInfo& rInfo = rowInfo[rowIndex];
if (rInfo.hasPctHeight) {
nscoord rowExtra = PR_MAX(0, rInfo.pctHeight - rInfo.height);
rowExtra = PR_MIN(rowExtra, extra);
UpdateHeights(rInfo, rowExtra, heightOfRows, heightOfUnStyledRows);
extra -= rowExtra;
}
}
nscoord rowGroupHeight = startRowGroupHeight + heightOfRows + ((numRows - 1) * cellSpacingY);
// if we have a style height, allocate the extra height to unconstrained rows
if ((aReflowState.mComputedHeight > rowGroupHeight) &&
(NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight)) {
nscoord extraComputedHeight = aReflowState.mComputedHeight - rowGroupHeight;
nscoord extraUsed = 0;
PRBool haveUnStyledRows = (heightOfUnStyledRows > 0);
nscoord divisor = (haveUnStyledRows)
? heightOfUnStyledRows : heightOfRows;
if (divisor > 0) {
for (rowIndex = 0; rowIndex < numRows; rowIndex++) {
if (!haveUnStyledRows || !rowInfo[rowIndex].hasStyleHeight) {
// The amount of additional space each row gets is based on the
// percentage of space it occupies
float percent = ((float)rowInfo[rowIndex].height) / ((float)divisor);
// give rows their percentage, except for the last row which gets the remainder
nscoord extraForRow = (numRows - 1 == rowIndex)
? extraComputedHeight - extraUsed
: NSToCoordRound(((float)extraComputedHeight) * percent);
extraForRow = PR_MIN(nsTableFrame::RoundToPixel(extraForRow, p2t), extraComputedHeight - extraUsed);
// update the row height
UpdateHeights(rowInfo[rowIndex], extraForRow, heightOfRows, heightOfUnStyledRows);
extraUsed += extraForRow;
if (extraUsed >= extraComputedHeight) {
NS_ASSERTION((extraUsed == extraComputedHeight), "invalid row height calculation");
break;
}
}
}
}
rowGroupHeight = aReflowState.mComputedHeight;
}
nscoord yOrigin = startRowGroupHeight;
// update the rows with their (potentially) new heights
for (rowFrame = startRowFrame, rowIndex = 0; rowFrame; rowFrame = rowFrame->GetNextRow(), rowIndex++) {
nsRect rowBounds;
rowFrame->GetRect(rowBounds);
PRBool movedFrame = (rowBounds.y != yOrigin);
nscoord rowHeight = (rowInfo[rowIndex].height > 0) ? rowInfo[rowIndex].height : 0;
if (movedFrame || (rowHeight != rowBounds.height)) {
// Resize the row to its final size and position
rowBounds.y = yOrigin;
rowBounds.height = rowHeight;
rowFrame->SetRect(aPresContext, rowBounds);
}
if (movedFrame) {
nsTableFrame::RePositionViews(aPresContext, rowFrame);
}
yOrigin += rowHeight + cellSpacingY;
}
DidResizeRows(*aPresContext, aReflowState, startRowFrame);
aDesiredSize.height = rowGroupHeight; // Adjust our desired size
delete [] rowInfo; // cleanup
}
// Called by IR_TargetIsChild() to adjust the sibling frames that follow
// after an incremental reflow of aKidFrame.
// This function is not used for paginated mode so we don't need to deal
// with continuing frames, and it's only called if aKidFrame has no
// cells that span into it and no cells that span across it. That way
// we don't have to deal with rowspans
nsresult
nsTableRowGroupFrame::AdjustSiblingsAfterReflow(nsIPresContext* aPresContext,
nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame,
nscoord aDeltaY)
{
NS_PRECONDITION(NS_UNCONSTRAINEDSIZE == aReflowState.reflowState.availableHeight,
"we're not in galley mode");
nsIFrame* lastKidFrame = aKidFrame;
// Move the frames that follow aKidFrame by aDeltaY
nsIFrame* kidFrame;
for (aKidFrame->GetNextSibling(&kidFrame); kidFrame; kidFrame->GetNextSibling(&kidFrame)) {
// Move the frame if we need to
if (aDeltaY != 0) {
nsPoint origin;
// Adjust the y-origin
kidFrame->GetOrigin(origin);
origin.y += aDeltaY;
kidFrame->MoveTo(aPresContext, origin.x, origin.y);
nsTableFrame::RePositionViews(aPresContext, kidFrame);
}
// Remember the last frame
lastKidFrame = kidFrame;
}
// Update our running y-offset to reflect the bottommost child
nsRect rect;
lastKidFrame->GetRect(rect);
aReflowState.y = rect.YMost();
return NS_OK;
}
// Create a continuing frame, add it to the child list, and then push it
// and the frames that follow
void
nsTableRowGroupFrame::CreateContinuingRowFrame(nsIPresContext& aPresContext,
nsIStyleSet& aStyleSet,
nsIFrame& aRowFrame,
nsIFrame** aContRowFrame)
{
if (!aContRowFrame) {NS_ASSERTION(PR_FALSE, "bad call"); return;}
// create the continuing frame which will create continuing cell frames
aStyleSet.CreateContinuingFrame(&aPresContext, &aRowFrame, this, aContRowFrame);
if (!*aContRowFrame) return;
// Add the continuing row frame to the child list
nsIFrame* nextRow;
GetNextFrame(&aRowFrame, &nextRow);
(*aContRowFrame)->SetNextSibling(nextRow);
aRowFrame.SetNextSibling(*aContRowFrame);
// Push the continuing row frame and the frames that follow
PushChildren(&aPresContext, *aContRowFrame, &aRowFrame);
}
nscoord
nsTableRowGroupFrame::SplitSpanningCells(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsIStyleSet& aStyleSet,
nsTableFrame& aTableFrame,
nsTableRowFrame& aRowFrame,
nscoord aRowEndY,
nsTableRowFrame* aContRowFrame)
{
PRInt32 rowIndex = aRowFrame.GetRowIndex();
PRInt32 colCount = aTableFrame.GetColCount();
nsTableCellFrame* prevCellFrame = nsnull;
nscoord tallestCell = 0;
for (PRInt32 colX = 0; colX < colCount; colX++) {
nsTableCellFrame* cellFrame = aTableFrame.GetCellInfoAt(rowIndex, colX);
if (!cellFrame) continue;
// use the last in flow since a cell with a row span may have already split.
cellFrame = (nsTableCellFrame*)cellFrame->GetLastInFlow();
// See if the cell frame is really in this row, or whether it's a cell spanning from a previous row
PRInt32 realRowIndex;
cellFrame->GetRowIndex(realRowIndex);
if (realRowIndex == rowIndex) {
prevCellFrame = cellFrame;
}
else {
nsTableRowFrame* parentFrame;
nsPoint cellOrigin;
nsReflowStatus status;
// Ask the cell frame's parent to reflow it to the height of all the
// rows it spans between its origin and aRowEndY
cellFrame->GetParent((nsIFrame**)&parentFrame);
if (!parentFrame) {NS_ASSERTION(PR_FALSE, "bad parent"); return 0;}
parentFrame->GetOrigin(cellOrigin);
nscoord cellAvailHeight = aRowEndY - cellOrigin.y;
nscoord cellHeight = parentFrame->ReflowCellFrame(&aPresContext, aReflowState, cellFrame,
cellAvailHeight, status);
if (NS_FRAME_IS_NOT_COMPLETE(status)) {
// Create a continuing cell frame since the cell's block split
nsTableCellFrame* contCellFrame = nsnull;
aStyleSet.CreateContinuingFrame(&aPresContext, cellFrame, &aRowFrame, (nsIFrame**)&contCellFrame);
// Add the continuing cell frame to the appropriate row's child list
if (contCellFrame) {
if (aContRowFrame) {
aContRowFrame->InsertCellFrame(contCellFrame, colX);
}
else {
aRowFrame.InsertCellFrame(contCellFrame, prevCellFrame);
}
prevCellFrame = contCellFrame;
}
}
else if ((cellHeight > cellAvailHeight) && aContRowFrame) {
// put the cell on the continuing row frame to give it more space
parentFrame->RemoveCellFrame(cellFrame);
aContRowFrame->InsertCellFrame(cellFrame, colX);
prevCellFrame = cellFrame;
}
tallestCell = PR_MAX(tallestCell, cellHeight);
}
}
return tallestCell;
}
nsresult
nsTableRowGroupFrame::SplitRowGroup(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame* aTableFrame,
nsReflowStatus& aStatus)
{
nsIFrame* prevRowFrame = nsnull;
aDesiredSize.height = 0;
nsresult rv = NS_OK;
// get the style set
nsCOMPtr<nsIStyleSet> styleSet;
nsCOMPtr<nsIPresShell> presShell;
aPresContext->GetShell(getter_AddRefs(presShell));
if (!presShell) {NS_ASSERTION(PR_FALSE, "no pres shell"); return NS_ERROR_NULL_POINTER;}
presShell->GetStyleSet(getter_AddRefs(styleSet));
if (!styleSet) {NS_ASSERTION(PR_FALSE, "no style set"); return NS_ERROR_NULL_POINTER;}
float p2t;
aPresContext->GetPixelsToTwips(&p2t);
nscoord availWidth = nsTableFrame::RoundToPixel(aReflowState.availableWidth, p2t);
nscoord availHeight = nsTableFrame::RoundToPixel(aReflowState.availableHeight, p2t);
nscoord lastDesiredHeight = 0;
// Walk each of the row frames looking for the first row frame that
// doesn't fit in the available space
for (nsTableRowFrame* rowFrame = GetFirstRow(); rowFrame; rowFrame = rowFrame->GetNextRow()) {
PRBool rowIsOnCurrentPage = PR_TRUE;
PRBool degenerateRow = PR_FALSE;
nsRect bounds;
rowFrame->GetRect(bounds);
if (bounds.YMost() > availHeight) {
nsRect actualRect;
nsRect adjRect;
aPresContext->GetPageDim(&actualRect, &adjRect);
nsIFrame* contRowFrame = nsnull;
nscoord pageHeight = actualRect.height;
// reflow the row in the availabe space and have it split if it is the 1st
// row or there is at least 5% of the current page available
if (!prevRowFrame || (availHeight - aDesiredSize.height > pageHeight / 20)) {
// Reflow the row in the available space and have it split
nsSize availSize(availWidth, availHeight - bounds.y);
nsHTMLReflowState rowReflowState(aPresContext, aReflowState, rowFrame,
availSize, eReflowReason_Resize);
nsHTMLReflowMetrics desiredSize(nsnull);
rv = ReflowChild(rowFrame, aPresContext, desiredSize, rowReflowState,
0, 0, NS_FRAME_NO_MOVE_FRAME, aStatus);
rowFrame->SizeTo(aPresContext, desiredSize.width, desiredSize.height);
rowFrame->DidReflow(aPresContext, NS_FRAME_REFLOW_FINISHED);
rowFrame->DidResize(aPresContext, aReflowState);
if (NS_FRAME_IS_NOT_COMPLETE(aStatus)) {
// the row frame is incomplete and all of the cells' block frames have split
CreateContinuingRowFrame(*aPresContext, *styleSet.get(), *rowFrame, &contRowFrame);
aDesiredSize.height += desiredSize.height;
if (prevRowFrame) {
aDesiredSize.height += aTableFrame->GetCellSpacingY();
}
}
else if (0 == desiredSize.height) {
// the row frame is complete because it had no cells originating in it.
CreateContinuingRowFrame(*aPresContext, *styleSet.get(), *rowFrame, &contRowFrame);
aStatus = NS_FRAME_NOT_COMPLETE;
aDesiredSize.height = availHeight;
degenerateRow = PR_TRUE;
}
else {
// the row frame is complete because it's minimum height was greater than the
// the available height we gave it
if (aDesiredSize.height > 0) {
// put the row on the next page since it needs more height than it was given
rowIsOnCurrentPage = PR_FALSE;
}
else {
nsIFrame* nextRowFrame;
// Push the row frame that follows
GetNextFrame(rowFrame, &nextRowFrame);
if (nextRowFrame) {
PushChildren(aPresContext, nextRowFrame, rowFrame);
}
aStatus = nextRowFrame ? NS_FRAME_NOT_COMPLETE : NS_FRAME_COMPLETE;
aDesiredSize.height = bounds.YMost();
}
}
}
else rowIsOnCurrentPage = PR_FALSE;
if (!rowIsOnCurrentPage) {
// Push this row frame and those that follow to the next-in-flow
PushChildren(aPresContext, rowFrame, prevRowFrame);
aStatus = NS_FRAME_NOT_COMPLETE;
}
if (prevRowFrame) {
nscoord tallestCell =
SplitSpanningCells(*aPresContext, aReflowState, *styleSet, *aTableFrame,
*rowFrame, aDesiredSize.height, (nsTableRowFrame*)contRowFrame);
if (degenerateRow) {
aDesiredSize.height = lastDesiredHeight + aTableFrame->GetCellSpacingY() + tallestCell;
}
}
break;
}
else {
aDesiredSize.height = bounds.YMost();
lastDesiredHeight = aDesiredSize.height;
prevRowFrame = rowFrame;
}
}
return NS_OK;
}
static void
CacheRowHeightsForPrinting(nsIPresContext* aPresContext,
nsTableRowFrame* aFirstRow)
{
for (nsTableRowFrame* row = aFirstRow; row; row = row->GetNextRow()) {
nsRect rect;
row->GetRect(rect);
row->SetHasUnpaginatedHeight(PR_TRUE);
row->SetUnpaginatedHeight(aPresContext, rect.height);
}
}
/** Layout the entire row group.
* This method stacks rows vertically according to HTML 4.0 rules.
* Rows are responsible for layout of their children.
*/
NS_METHOD
nsTableRowGroupFrame::Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTableRowGroupFrame", aReflowState.reason);
DISPLAY_REFLOW(aPresContext, this, aReflowState, aDesiredSize, aStatus);
#if defined DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugReflow(this, (nsHTMLReflowState&)aReflowState);
#endif
nsresult rv=NS_OK;
aStatus = NS_FRAME_COMPLETE;
nsTableFrame* tableFrame = nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (!aPresContext || !tableFrame) return NS_ERROR_NULL_POINTER;
nsRowGroupReflowState state(aReflowState, tableFrame);
PRBool haveDesiredHeight = PR_FALSE;
PRBool isPaginated;
aPresContext->IsPaginated(&isPaginated);
if (eReflowReason_Incremental == aReflowState.reason) {
rv = IncrementalReflow(aPresContext, aDesiredSize, state, aStatus);
}
else {
// Check for an overflow list
MoveOverflowToChildList(aPresContext);
if (isPaginated && aReflowState.mFlags.mSpecialTableReflow) {
// cache row height info for printing, now that row heights are known.
CacheRowHeightsForPrinting(aPresContext, GetFirstRow());
}
// Reflow the existing frames.
rv = ReflowChildren(aPresContext, aDesiredSize, state, aStatus,
nsnull, PR_FALSE);
// Return our desired rect
aDesiredSize.width = aReflowState.availableWidth;
aDesiredSize.height = state.y;
// shrink wrap rows to height of tallest cell in that row
PRBool isTableUnconstrainedReflow =
(NS_UNCONSTRAINEDSIZE == aReflowState.parentReflowState->availableWidth);
// Avoid calling CalculateRowHeights. We can avoid it if the table is going to be
// doing a pass 2 reflow. In the case where the table is getting an unconstrained
// reflow, then we need to do this because the table will skip the pass 2 reflow,
// but we need to correctly calculate the row group height and we can't if there
// are row spans unless we do this step
if (aReflowState.mFlags.mSpecialTableReflow) {
DidResizeRows(*aPresContext, aReflowState);
}
else if ((eReflowReason_Initial != aReflowState.reason) ||
isTableUnconstrainedReflow ||
isPaginated) {
CalculateRowHeights(aPresContext, aDesiredSize, aReflowState);
haveDesiredHeight = PR_TRUE;
}
// See if all the frames fit
if (aDesiredSize.height > aReflowState.availableHeight) {
// Nope, find a place to split the row group
PRBool specialReflow = (PRBool)aReflowState.mFlags.mSpecialTableReflow;
((nsHTMLReflowState::ReflowStateFlags&)aReflowState.mFlags).mSpecialTableReflow = PR_FALSE;
SplitRowGroup(aPresContext, aDesiredSize, aReflowState, tableFrame, aStatus);
((nsHTMLReflowState::ReflowStateFlags&)aReflowState.mFlags).mSpecialTableReflow = specialReflow;
}
}
SetHasStyleHeight((NS_UNCONSTRAINEDSIZE != aReflowState.mComputedHeight) &&
(aReflowState.mComputedHeight > 0));
if (aReflowState.mFlags.mSpecialTableReflow) {
SetNeedSpecialReflow(PR_FALSE);
}
// just set our width to what was available. The table will calculate the width and not use our value.
aDesiredSize.width = aReflowState.availableWidth;
if (!haveDesiredHeight) {
// calculate the height based on the rect of the last row
aDesiredSize.height = GetHeightOfRows(aPresContext);
}
#if defined DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugReflow(this, (nsHTMLReflowState&)aReflowState, &aDesiredSize, aStatus);
#endif
return rv;
}
NS_METHOD
nsTableRowGroupFrame::IncrementalReflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
// determine if this frame is the target or not
nsIFrame* target = nsnull;
rv = aReflowState.reflowState.reflowCommand->GetTarget(target);
if (NS_SUCCEEDED(rv) && target) {
if (this == target)
rv = IR_TargetIsMe(aPresContext, aDesiredSize, aReflowState, aStatus);
else {
// Get the next frame in the reflow chain
nsIFrame* nextFrame;
aReflowState.reflowState.reflowCommand->GetNext(nextFrame);
rv = IR_TargetIsChild(aPresContext, aDesiredSize, aReflowState, aStatus, nextFrame);
}
}
return rv;
}
NS_IMETHODIMP
nsTableRowGroupFrame::AppendFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
// collect the new row frames in an array
nsAutoVoidArray rows;
for (nsIFrame* rowFrame = aFrameList; rowFrame; rowFrame->GetNextSibling(&rowFrame)) {
nsCOMPtr<nsIAtom> frameType;
rowFrame->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::tableRowFrame == frameType.get()) {
rows.AppendElement(rowFrame);
}
}
PRInt32 rowIndex = GetRowCount();
// Append the frames to the sibling chain
mFrames.AppendFrames(nsnull, aFrameList);
if (rows.Count() > 0) {
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
if (tableFrame) {
tableFrame->AppendRows(*aPresContext, *this, rowIndex, rows);
// Reflow the new frames. They're already marked dirty, so generate a reflow
// command that tells us to reflow our dirty child frames
nsTableFrame::AppendDirtyReflowCommand(&aPresShell, this);
if (tableFrame->RowIsSpannedInto(rowIndex)) {
tableFrame->SetNeedStrategyInit(PR_TRUE);
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::InsertFrames(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
if (!tableFrame) {
NS_ASSERTION(PR_FALSE, "no table frame");
return NS_ERROR_NULL_POINTER;
}
// collect the new row frames in an array
nsVoidArray rows;
PRBool gotFirstRow = PR_FALSE;
for (nsIFrame* rowFrame = aFrameList; rowFrame; rowFrame->GetNextSibling(&rowFrame)) {
nsCOMPtr<nsIAtom> frameType;
rowFrame->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::tableRowFrame == frameType.get()) {
rows.AppendElement(rowFrame);
if (!gotFirstRow) {
((nsTableRowFrame*)rowFrame)->SetFirstInserted(PR_TRUE);
gotFirstRow = PR_TRUE;
tableFrame->SetRowInserted(PR_TRUE);
}
}
}
PRInt32 startRowIndex = GetStartRowIndex();
// Insert the frames in the sibling chain
mFrames.InsertFrames(nsnull, aPrevFrame, aFrameList);
PRInt32 numRows = rows.Count();
if (numRows > 0) {
nsTableRowFrame* prevRow = (nsTableRowFrame *)nsTableFrame::GetFrameAtOrBefore(aPresContext, this, aPrevFrame, nsLayoutAtoms::tableRowFrame);
PRInt32 rowIndex = (prevRow) ? prevRow->GetRowIndex() + 1 : startRowIndex;
tableFrame->InsertRows(*aPresContext, *this, rows, rowIndex, PR_TRUE);
// Reflow the new frames. They're already marked dirty, so generate a reflow
// command that tells us to reflow our dirty child frames
nsTableFrame::AppendDirtyReflowCommand(&aPresShell, this);
if (tableFrame->RowIsSpannedInto(rowIndex) ||
tableFrame->RowHasSpanningCells(rowIndex + numRows - 1)) {
tableFrame->SetNeedStrategyInit(PR_TRUE);
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::RemoveFrame(nsIPresContext* aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
if (tableFrame) {
nsCOMPtr<nsIAtom> frameType;
aOldFrame->GetFrameType(getter_AddRefs(frameType));
if (nsLayoutAtoms::tableRowFrame == frameType.get()) {
// remove the rows from the table (and flag a rebalance)
tableFrame->RemoveRows(*aPresContext, (nsTableRowFrame &)*aOldFrame, 1, PR_TRUE);
// XXX this could be optimized (see nsTableFrame::RemoveRows)
tableFrame->SetNeedStrategyInit(PR_TRUE);
// Because we haven't added any new frames we don't need to do a pass1
// reflow. Just generate a reflow command so we reflow the table
nsTableFrame::AppendDirtyReflowCommand(&aPresShell, this);
}
}
mFrames.DestroyFrame(aPresContext, aOldFrame);
return NS_OK;
}
NS_METHOD
nsTableRowGroupFrame::IR_TargetIsMe(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_FRAME_COMPLETE;
nsIReflowCommand::ReflowType type;
aReflowState.reflowState.reflowCommand->GetType(type);
switch (type) {
case nsIReflowCommand::ReflowDirty: {
nsRowGroupReflowState state(aReflowState);
state.reason = eReflowReason_Resize;
// Reflow the dirty child frames. Typically this is newly added frames.
nsTableRowFrame* firstRowReflowed;
rv = ReflowChildren(aPresContext, aDesiredSize, state, aStatus,
nsnull, PR_TRUE, &firstRowReflowed);
CalculateRowHeights(aPresContext, aDesiredSize, aReflowState.reflowState, firstRowReflowed);
break;
}
case nsIReflowCommand::StyleChanged :
rv = IR_StyleChanged(aPresContext, aDesiredSize, aReflowState, aStatus);
break;
case nsIReflowCommand::ContentChanged :
NS_ASSERTION(PR_FALSE, "illegal reflow type: ContentChanged");
rv = NS_ERROR_ILLEGAL_VALUE;
break;
default:
NS_NOTYETIMPLEMENTED("unexpected reflow command type");
rv = NS_ERROR_NOT_IMPLEMENTED;
break;
}
// XXX If we have a next-in-flow, then we're not complete
if (mNextInFlow) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
return rv;
}
nscoord
nsTableRowGroupFrame::GetHeightBasis(const nsHTMLReflowState& aReflowState)
{
nscoord result = 0;
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame((nsIFrame*)this, tableFrame);
if (tableFrame) {
if ((aReflowState.mComputedHeight > 0) && (aReflowState.mComputedHeight < NS_UNCONSTRAINEDSIZE)) {
nscoord cellSpacing = PR_MAX(0, GetRowCount() - 1) * tableFrame->GetCellSpacingY();
result = aReflowState.mComputedHeight - cellSpacing;
}
else {
const nsHTMLReflowState* parentRS = aReflowState.parentReflowState;
if (parentRS && (tableFrame != parentRS->frame)) {
parentRS = parentRS->parentReflowState;
}
if (parentRS && (tableFrame == parentRS->frame) &&
(parentRS->mComputedHeight > 0) && (parentRS->mComputedHeight < NS_UNCONSTRAINEDSIZE)) {
nscoord cellSpacing = PR_MAX(0, tableFrame->GetRowCount() + 1) * tableFrame->GetCellSpacingY();
result = parentRS->mComputedHeight - cellSpacing;
}
}
}
return result;
}
nscoord
nsTableRowGroupFrame::GetHeightOfRows(nsIPresContext* aPresContext)
{
nsTableFrame* tableFrame = nsnull;
nsresult rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (!tableFrame) return 0;
nscoord height = 0;
// enumerate the rows and total their heights
nsIFrame* rowFrame = nsnull;
rv = FirstChild(aPresContext, nsnull, &rowFrame);
PRInt32 numRows = 0;
while ((NS_SUCCEEDED(rv)) && rowFrame) {
const nsStyleDisplay* rowDisplay;
rowFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)rowDisplay));
if (NS_STYLE_DISPLAY_TABLE_ROW == rowDisplay->mDisplay) {
nsRect rowRect;
rowFrame->GetRect(rowRect);
height += rowRect.height;
numRows++;
}
GetNextFrame(rowFrame, &rowFrame);
}
if (numRows > 1) {
height += (numRows - 1) * tableFrame->GetCellSpacingY(); // add in cell spacing
}
return height;
}
// Recovers the reflow state to what it should be if aKidFrame is about
// to be reflowed. Restores availSize, y
nsresult
nsTableRowGroupFrame::RecoverState(nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame)
{
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
nscoord cellSpacingY = tableFrame->GetCellSpacingY();
// Walk the list of children up to aKidFrame
for (nsIFrame* frame = mFrames.FirstChild(); frame && (frame != aKidFrame); frame->GetNextSibling(&frame)) {
nsCOMPtr<nsIAtom> fType;
frame->GetFrameType(getter_AddRefs(fType));
if (fType.get() == nsLayoutAtoms::tableRowFrame) {
// Update the running y-offset
nsSize kidSize;
frame->GetSize(kidSize);
aReflowState.y += kidSize.height + cellSpacingY;
// If our height is constrained then update the available height
if (NS_UNCONSTRAINEDSIZE != aReflowState.availSize.height) {
aReflowState.availSize.height -= kidSize.height;
}
}
}
return NS_OK;
}
PRBool
nsTableRowGroupFrame::IsSimpleRowFrame(nsTableFrame* aTableFrame,
nsIFrame* aFrame)
{
// Make sure it's a row frame and not a row group frame
nsCOMPtr<nsIAtom> frameType;
aFrame->GetFrameType(getter_AddRefs(frameType));
if (frameType.get() == nsLayoutAtoms::tableRowFrame) {
PRInt32 rowIndex = ((nsTableRowFrame*)aFrame)->GetRowIndex();
// It's a simple row frame if there are no cells that span into or
// across the row
if (!aTableFrame->RowIsSpannedInto(rowIndex) &&
!aTableFrame->RowHasSpanningCells(rowIndex)) {
return PR_TRUE;
}
}
return PR_FALSE;
}
nscoord
GetFrameYMost(nsIFrame* aFrame)
{
nsRect rect;
aFrame->GetRect(rect);
return rect.YMost();
}
nsIFrame*
GetLastRowSibling(nsIFrame* aRowFrame)
{
nsIFrame* lastRowFrame = nsnull;
nsIFrame* lastFrame = aRowFrame;
while (lastFrame) {
nsCOMPtr<nsIAtom> fType;
lastFrame->GetFrameType(getter_AddRefs(fType));
if (nsLayoutAtoms::tableRowFrame == fType.get()) {
lastRowFrame = lastFrame;
}
lastFrame->GetNextSibling(&lastFrame);
}
return lastRowFrame;
}
NS_METHOD
nsTableRowGroupFrame::IR_TargetIsChild(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame* aNextFrame)
{
nsresult rv;
// Recover the state as if aNextFrame is about to be reflowed
RecoverState(aReflowState, aNextFrame);
// Remember the old rect
nsRect oldKidRect;
aNextFrame->GetRect(oldKidRect);
// Reflow the child giving it as much room as it wants. We'll deal with
// splitting later after final determination of rows heights taking into
// account cells with row spans...
nsSize kidAvailSize(aReflowState.availSize.width, NS_UNCONSTRAINEDSIZE);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState.reflowState,
aNextFrame, kidAvailSize);
nsSize kidMaxElementSize;
nsHTMLReflowMetrics desiredSize(aDesiredSize.maxElementSize ? &kidMaxElementSize : nsnull,
aDesiredSize.mFlags);
// Pass along the reflow command
rv = ReflowChild(aNextFrame, aPresContext, desiredSize, kidReflowState,
0, aReflowState.y, 0, aStatus);
// Place the row frame
nsRect kidRect(0, aReflowState.y, desiredSize.width, desiredSize.height);
PlaceChild(aPresContext, aReflowState, aNextFrame, desiredSize);
// See if the table needs a reflow (e.g., if the column widths have
// changed). If so, just return and don't bother adjusting the rows
// that follow
if (!aReflowState.tableFrame->NeedsReflow(aReflowState.reflowState)) {
// Only call CalculateRowHeights() if necessary since it can be expensive
PRBool needToCalcRowHeights = PR_FALSE;
if (IsSimpleRowFrame(aReflowState.tableFrame, aNextFrame)) {
// See if the row changed height
if (oldKidRect.height == desiredSize.height) {
// We don't need to do any painting. The row frame has made sure that
// the cell is properly positioned, and done any necessary repainting.
// Just calculate our desired height
aDesiredSize.height = GetFrameYMost(GetLastRowSibling(mFrames.FirstChild()));
} else {
// Inform the row of its new height.
((nsTableRowFrame*)aNextFrame)->DidResize(aPresContext, aReflowState.reflowState);
if (aReflowState.tableFrame->IsAutoHeight()) {
// Because other cells in the row may need to be be aligned differently,
// repaint the entire row
// XXX Improve this so the row knows it should bitblt (or repaint) those
// cells that change position...
if (!kidRect.IsEmpty()) {
Invalidate(aPresContext, kidRect);
}
// Invalidate the area we're offseting. Note that we only repaint within
// our existing frame bounds.
// XXX It would be better to bitblt the row frames and not repaint,
// but we don't have such a view manager function yet...
if (kidRect.YMost() < mRect.height) {
nsRect dirtyRect(0, kidRect.YMost(),
mRect.width, mRect.height - kidRect.YMost());
Invalidate(aPresContext, dirtyRect);
}
// Adjust the frames that follow
AdjustSiblingsAfterReflow(aPresContext, aReflowState, aNextFrame,
desiredSize.height - oldKidRect.height);
aDesiredSize.height = aReflowState.y;
}
else needToCalcRowHeights = PR_TRUE;
}
} else {
if (desiredSize.mNothingChanged) { // mNothingChanges currently only works when a cell is the target
// the cell frame did not change size. Just calculate our desired height
aDesiredSize.height = GetFrameYMost(GetLastRowSibling(mFrames.FirstChild()));
}
else needToCalcRowHeights = PR_TRUE;
}
if (needToCalcRowHeights) {
// Adjust the frames that follow...
// XXX is this needed since CalculateRowHeights will be called?
//AdjustSiblingsAfterReflow(aPresContext, aReflowState, aNextFrame,
// desiredSize.height - oldKidRect.height);
// Now recalculate the row heights
CalculateRowHeights(aPresContext, aDesiredSize, aReflowState.reflowState);
// Because we don't know what changed repaint everything.
// XXX We should change CalculateRowHeights() to return the bounding
// rect of what changed. Or whether anything moved or changed size...
nsRect dirtyRect(0, 0, mRect.width, mRect.height);
Invalidate(aPresContext, dirtyRect);
}
}
// Return our desired width
//aDesiredSize.width = aReflowState.reflowState.availableWidth;
if (mNextInFlow) {
aStatus = NS_FRAME_NOT_COMPLETE;
}
return rv;
}
NS_METHOD
nsTableRowGroupFrame::IR_StyleChanged(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_OK;
// we presume that all the easy optimizations were done in the nsHTMLStyleSheet before we were called here
// XXX: we can optimize this when we know which style attribute changed
aReflowState.tableFrame->SetNeedStrategyInit(PR_TRUE);
nsRowGroupReflowState state(aReflowState);
nsTableRowFrame* firstRowReflowed;
rv = ReflowChildren(aPresContext, aDesiredSize, state, aStatus,
nsnull, PR_FALSE, &firstRowReflowed);
CalculateRowHeights(aPresContext, aDesiredSize, aReflowState.reflowState, firstRowReflowed);
return rv;
}
NS_IMETHODIMP
nsTableRowGroupFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::tableRowGroupFrame;
NS_ADDREF(*aType);
return NS_OK;
}
/* ----- global methods ----- */
nsresult
NS_NewTableRowGroupFrame(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsTableRowGroupFrame* it = new (aPresShell) nsTableRowGroupFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
nsresult rv;
// Let the base class do its processing
rv = nsHTMLContainerFrame::Init(aPresContext, aContent, aParent, aContext,
aPrevInFlow);
// record that children that are ignorable whitespace should be excluded
mState |= NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE;
return rv;
}
#ifdef DEBUG
NS_IMETHODIMP
nsTableRowGroupFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("TableRowGroup"), aResult);
}
NS_IMETHODIMP
nsTableRowGroupFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
PRUint32 sum = sizeof(*this);
*aResult = sum;
return NS_OK;
}
#endif
//nsILineIterator methods for nsTableFrame
NS_IMETHODIMP
nsTableRowGroupFrame::GetNumLines(PRInt32* aResult)
{
NS_ENSURE_ARG_POINTER(aResult);
*aResult = GetRowCount();
return *aResult; // XXX should return NS_OK
}
NS_IMETHODIMP
nsTableRowGroupFrame::GetDirection(PRBool* aIsRightToLeft)
{
NS_ENSURE_ARG_POINTER(aIsRightToLeft);
*aIsRightToLeft = PR_FALSE;
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::GetLine(PRInt32 aLineNumber,
nsIFrame** aFirstFrameOnLine,
PRInt32* aNumFramesOnLine,
nsRect& aLineBounds,
PRUint32* aLineFlags)
{
NS_ENSURE_ARG_POINTER(aFirstFrameOnLine);
NS_ENSURE_ARG_POINTER(aNumFramesOnLine);
NS_ENSURE_ARG_POINTER(aLineFlags);
nsTableFrame* parentFrame = nsnull;
if (NS_FAILED(nsTableFrame::GetTableFrame(this, parentFrame)))
return NS_ERROR_FAILURE;
nsTableCellMap* cellMap = parentFrame->GetCellMap();
if(!cellMap)
return NS_ERROR_FAILURE;
if(aLineNumber >= cellMap->GetRowCount())
return NS_ERROR_INVALID_ARG;
*aLineFlags = 0;/// should we fill these in later?
// not gonna touch aLineBounds right now
CellData* firstCellData = cellMap->GetCellAt(aLineNumber, 0);
if(!firstCellData)
return NS_ERROR_FAILURE;
*aFirstFrameOnLine = (nsIFrame*)firstCellData->GetCellFrame();
if(!(*aFirstFrameOnLine))
{
while((aLineNumber > 0)&&(!(*aFirstFrameOnLine)))
{
aLineNumber--;
firstCellData = cellMap->GetCellAt(aLineNumber, 0);
*aFirstFrameOnLine = (nsIFrame*)firstCellData->GetCellFrame();
}
}
*aNumFramesOnLine = cellMap->GetNumCellsOriginatingInRow(aLineNumber);
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::FindLineContaining(nsIFrame* aFrame,
PRInt32* aLineNumberResult)
{
NS_ENSURE_ARG_POINTER(aFrame);
NS_ENSURE_ARG_POINTER(aLineNumberResult);
// make sure it is a rowFrame in the RowGroup
// - it should be, but we do not validate in every case (see bug 88849)
nsCOMPtr<nsIAtom> frameType;
aFrame->GetFrameType(getter_AddRefs(frameType));
if (frameType.get() != nsLayoutAtoms::tableRowFrame) {
NS_WARNING("RowGroup contains a frame that is not a row");
*aLineNumberResult = 0;
return NS_ERROR_FAILURE;
}
nsTableRowFrame* rowFrame = (nsTableRowFrame*)aFrame;
*aLineNumberResult = rowFrame->GetRowIndex();
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::FindLineAt(nscoord aY,
PRInt32* aLineNumberResult)
{
return NS_ERROR_NOT_IMPLEMENTED;
}
#ifdef IBMBIDI
NS_IMETHODIMP
nsTableRowGroupFrame::CheckLineOrder(PRInt32 aLine,
PRBool *aIsReordered,
nsIFrame **aFirstVisual,
nsIFrame **aLastVisual)
{
*aIsReordered = PR_FALSE;
return NS_OK;
}
#endif // IBMBIDI
NS_IMETHODIMP
nsTableRowGroupFrame::FindFrameAt(PRInt32 aLineNumber,
nscoord aX,
#ifdef IBMBIDI
PRBool aCouldBeReordered,
#endif // IBMBIDI
nsIFrame** aFrameFound,
PRBool* aXIsBeforeFirstFrame,
PRBool* aXIsAfterLastFrame)
{
PRInt32 cellCount = 0;
CellData* cellData;
nsIFrame* tempFrame;
nsRect tempRect;
nsRect& tempRectRef = tempRect;
nsresult rv;
nsTableFrame* parentFrame = nsnull;
rv = nsTableFrame::GetTableFrame(this, parentFrame);
nsTableCellMap* cellMap = parentFrame->GetCellMap();
if(!cellMap)
return NS_ERROR_FAILURE;
cellCount = cellMap->GetNumCellsOriginatingInRow(aLineNumber);
*aXIsBeforeFirstFrame = PR_FALSE;
*aXIsAfterLastFrame = PR_FALSE;
PRBool gotParentRect = PR_FALSE;
for(int i =0;i < cellCount; i++)
{
cellData = cellMap->GetCellAt(aLineNumber, i);
tempFrame = (nsIFrame*)cellData->GetCellFrame();
if(!tempFrame)
continue;
tempFrame->GetRect(tempRectRef);//offsetting x to be in row coordinates
if(!gotParentRect)
{//only do this once
nsRect parentRect;
nsRect& parentRectRef = parentRect;
nsIFrame* tempParentFrame;
rv = tempFrame->GetParent(&tempParentFrame);
if(NS_FAILED(rv))
return rv;
if(!tempParentFrame)
return NS_ERROR_FAILURE;
tempParentFrame->GetRect(parentRectRef);
aX -= parentRect.x;
gotParentRect = PR_TRUE;
}
if(i==0 &&(aX <= 0))//short circuit for negative x coords
{
*aXIsBeforeFirstFrame = PR_TRUE;
*aFrameFound = tempFrame;
return NS_OK;
}
if(aX < tempRect.x)
{
return NS_ERROR_FAILURE;
}
if(aX < (tempRect.x + tempRect.width))
{
*aFrameFound = tempFrame;
return NS_OK;
}
}
//x coord not found in frame, return last frame
*aXIsAfterLastFrame = PR_TRUE;
*aFrameFound = tempFrame;
if(!(*aFrameFound))
return NS_ERROR_FAILURE;
return NS_OK;
}
NS_IMETHODIMP
nsTableRowGroupFrame::GetNextSiblingOnLine(nsIFrame*& aFrame,
PRInt32 aLineNumber)
{
NS_ENSURE_ARG_POINTER(aFrame);
nsITableCellLayout* cellFrame;
nsresult result = aFrame->QueryInterface(NS_GET_IID(nsITableCellLayout),(void**)&cellFrame);
if(NS_FAILED(result) || !cellFrame)
return result?result:NS_ERROR_FAILURE;
nsTableFrame* parentFrame = nsnull;
result = nsTableFrame::GetTableFrame(this, parentFrame);
nsTableCellMap* cellMap = parentFrame->GetCellMap();
if(!cellMap)
return NS_ERROR_FAILURE;
PRInt32 colIndex;
PRInt32& colIndexRef = colIndex;
cellFrame->GetColIndex(colIndexRef);
CellData* cellData = cellMap->GetCellAt(aLineNumber, colIndex + 1);
if(!cellData)// if this isnt a valid cell, drop down and check the next line
{
cellData = cellMap->GetCellAt(aLineNumber + 1, 0);
if(!cellData)
{
//*aFrame = nsnull;
return NS_ERROR_FAILURE;
}
}
aFrame = (nsIFrame*)cellData->GetCellFrame();
if(!aFrame)
{
//PRInt32 numCellsInRow = cellMap->GetNumCellsOriginatingInRow(aLineNumber) - 1;
PRInt32 tempCol = colIndex + 1;
PRInt32 tempRow = aLineNumber;
while((tempCol > 0) && (!aFrame))
{
tempCol--;
cellData = cellMap->GetCellAt(aLineNumber, tempCol);
aFrame = (nsIFrame*)cellData->GetCellFrame();
if(!aFrame && (tempCol==0))
{
while((tempRow > 0) && (!aFrame))
{
tempRow--;
cellData = cellMap->GetCellAt(tempRow, 0);
aFrame = (nsIFrame*)cellData->GetCellFrame();
}
}
}
}
return NS_OK;
}
//end nsLineIterator methods
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