pjs/layout/tables/nsTableRowFrame.cpp

1603 строки
60 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "nsTableRowFrame.h"
#include "nsIRenderingContext.h"
#include "nsIPresShell.h"
#include "nsIPresContext.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIHTMLAttributes.h"
#include "nsHTMLAtoms.h"
#include "nsIContent.h"
#include "nsTableFrame.h"
#include "nsTableCellFrame.h"
#include "nsIView.h"
#include "nsIPtr.h"
#include "nsIReflowCommand.h"
#include "nsCSSRendering.h"
#include "nsHTMLIIDs.h"
#include "nsLayoutAtoms.h"
#include "nsHTMLParts.h"
#include "nsTableColGroupFrame.h"
#include "nsTableColFrame.h"
#include "nsCOMPtr.h"
// the following header files are required for style optimizations that work only when the child content is really a cell
#include "nsIHTMLTableCellElement.h"
static NS_DEFINE_IID(kIHTMLTableCellElementIID, NS_IHTMLTABLECELLELEMENT_IID);
// end includes for style optimizations that require real content knowledge
NS_DEF_PTR(nsIStyleContext);
/* ----------- nsTableRowpFrame ---------- */
nsTableRowFrame::nsTableRowFrame()
: nsHTMLContainerFrame(),
mTallestCell(0),
mCellMaxTopMargin(0),
mCellMaxBottomMargin(0),
mMinRowSpan(1),
mInitializedChildren(PR_FALSE)
{
}
NS_IMETHODIMP
nsTableRowFrame::Init(nsIPresContext& aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow)
{
nsresult rv;
// Let the the base class do its initialization
rv = nsHTMLContainerFrame::Init(aPresContext, aContent, aParent, aContext,
aPrevInFlow);
if (aPrevInFlow) {
// Set the row index
nsTableRowFrame* rowFrame = (nsTableRowFrame*)aPrevInFlow;
SetRowIndex(rowFrame->GetRowIndex());
}
return rv;
}
// Helper function. It marks the table frame as dirty and generates
// a reflow command
nsresult
nsTableRowFrame::AddTableDirtyReflowCommand(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIFrame* aTableFrame)
{
nsFrameState frameState;
nsIFrame* tableParentFrame;
nsIReflowCommand* reflowCmd;
nsresult rv;
// Mark the table frame as dirty
aTableFrame->GetFrameState(&frameState);
frameState |= NS_FRAME_IS_DIRTY;
aTableFrame->SetFrameState(frameState);
// Target the reflow comamnd at its parent frame
aTableFrame->GetParent(&tableParentFrame);
rv = NS_NewHTMLReflowCommand(&reflowCmd, tableParentFrame,
nsIReflowCommand::ReflowDirty);
if (NS_SUCCEEDED(rv)) {
// Add the reflow command
rv = aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
return rv;
}
NS_IMETHODIMP
nsTableRowFrame::AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList)
{
// Append the frames
mFrames.AppendFrames(nsnull, aFrameList);
// Add the new cell frames to the table
nsTableFrame *tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
for (nsIFrame* childFrame = aFrameList; childFrame; childFrame->GetNextSibling(&childFrame)) {
const nsStyleDisplay *display;
childFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)display));
if (NS_STYLE_DISPLAY_TABLE_CELL == display->mDisplay) {
// Add the cell to the cell map
PRInt32 colIndex = tableFrame->AddCellToTable((nsTableCellFrame*)childFrame,
GetRowIndex());
// Initialize the cell frame and give it its column index
((nsTableCellFrame*)childFrame)->InitCellFrame(colIndex);
}
}
// See if any implicit column frames need to be created as a result of
// adding the new rows
PRBool createdColFrames;
tableFrame->EnsureColumns(aPresContext, createdColFrames);
if (createdColFrames) {
// We need to rebuild the column cache
// XXX It would be nice if this could be done incrementally
tableFrame->InvalidateColumnCache();
}
// Reflow the new frames. They're already marked dirty, so generate a reflow
// command that tells us to reflow our dirty child frames
nsIReflowCommand* reflowCmd;
if (NS_SUCCEEDED(NS_NewHTMLReflowCommand(&reflowCmd, this,
nsIReflowCommand::ReflowDirty))) {
aPresShell.AppendReflowCommand(reflowCmd);
NS_RELEASE(reflowCmd);
}
return NS_OK;
}
NS_IMETHODIMP
nsTableRowFrame::InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
// Get the table frame
nsTableFrame* tableFrame = nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
// Insert the frames
mFrames.InsertFrames(nsnull, aPrevFrame, aFrameList);
// We need to rebuild the cell map, because currently we can't insert
// new frames except at the end (append)
tableFrame->InvalidateCellMap();
// We should try and avoid doing a pass1 reflow on all the cells and just
// do it for the newly added frames, but we need to add these frames to the
// cell map before we reflow them
tableFrame->InvalidateFirstPassCache();
// Because the number of columns may have changed invalidate the column
// cache. Note that this has the side effect of recomputing the column
// widths, so we don't need to call InvalidateColumnWidths()
tableFrame->InvalidateColumnCache();
// Generate a reflow command so we reflow the table itself. This will
// do a pass-1 reflow of all the rows including any rows we just added
AddTableDirtyReflowCommand(aPresContext, aPresShell, tableFrame);
return NS_OK;
}
NS_IMETHODIMP
nsTableRowFrame::RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame)
{
// Get the table frame
nsTableFrame* tableFrame=nsnull;
nsTableFrame::GetTableFrame(this, tableFrame);
#if 0
// XXX Currently we can't incrementally remove cells from the cell map
PRInt32 colIndex;
aDeletedFrame->GetColIndex(colIndex);
tableFrame->RemoveCellFromTable(aOldFrame, GetRowIndex());
// Remove the frame and destroy it
mFrames.DestroyFrame(aPresContext, (nsIFrame*)aOldFrame);
// XXX Reflow the row
#else
// Remove the frame and destroy it
mFrames.DestroyFrame(aPresContext, aOldFrame);
// We need to rebuild the cell map, because currently we can't incrementally
// remove rows
tableFrame->InvalidateCellMap();
// Because the number of columns may have changed invalidate the column
// cache. Note that this has the side effect of recomputing the column
// widths, so we don't need to call InvalidateColumnWidths()
tableFrame->InvalidateColumnCache();
// 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 itself
AddTableDirtyReflowCommand(aPresContext, aPresShell, tableFrame);
#endif
return NS_OK;
}
NS_IMETHODIMP
nsTableRowFrame::InitChildrenWithIndex(PRInt32 aRowIndex)
{
nsTableFrame* table = nsnull;
nsresult result=NS_OK;
// each child cell can only be added to the table one time.
// for now, we remember globally whether we've added all or none
if (PR_FALSE==mInitializedChildren)
{
result = nsTableFrame::GetTableFrame(this, table);
if ((NS_OK==result) && (table != nsnull))
{
mInitializedChildren=PR_TRUE;
SetRowIndex(aRowIndex);
for (nsIFrame* kidFrame = mFrames.FirstChild(); nsnull != kidFrame; kidFrame->GetNextSibling(&kidFrame))
{
const nsStyleDisplay *kidDisplay;
kidFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay)
{
// add the cell frame to the table's cell map and get its col index
PRInt32 colIndex;
colIndex = table->AddCellToTable((nsTableCellFrame *)kidFrame, aRowIndex);
// what column does this cell belong to?
// this sets the frame's notion of its column index
((nsTableCellFrame *)kidFrame)->InitCellFrame(colIndex);
}
}
}
}
return NS_OK;
}
NS_IMETHODIMP
nsTableRowFrame::InitChildren()
{
nsTableFrame* table = nsnull;
nsresult result=NS_OK;
// each child cell can only be added to the table one time.
// for now, we remember globally whether we've added all or none
if (PR_FALSE==mInitializedChildren)
{
result = nsTableFrame::GetTableFrame(this, table);
if ((NS_OK==result) && (table != nsnull))
{
PRInt32 rowIndex = table->GetNextAvailRowIndex();
InitChildrenWithIndex(rowIndex);
}
}
return NS_OK;
}
/**
* Post-reflow hook. This is where the table row does its post-processing
*/
void
nsTableRowFrame::DidResize(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState)
{
// Resize and re-align the cell frames based on our row height
nscoord rowCellHeight = mRect.height - mCellMaxTopMargin - mCellMaxBottomMargin;
nsTableFrame* tableFrame;
nsTableFrame::GetTableFrame(this, tableFrame);
nsTableIterator iter(*this, eTableDIR);
nsIFrame* cellFrame = iter.First();
while (nsnull != cellFrame) {
const nsStyleDisplay *kidDisplay;
cellFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay) {
PRInt32 rowSpan = tableFrame->GetEffectiveRowSpan(mRowIndex, (nsTableCellFrame *)cellFrame);
nscoord cellHeight = rowCellHeight;
// add in height of rows spanned beyond the 1st one
nsIFrame* nextRow = nsnull;
GetNextSibling(&nextRow);
for (int i = 1; ((i < rowSpan) && nextRow);) {
const nsStyleDisplay *nextDisplay;
nextRow->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)nextDisplay));
if (NS_STYLE_DISPLAY_TABLE_ROW == nextDisplay->mDisplay) {
nsRect rect;
nextRow->GetRect(rect);
cellHeight += rect.height;
i++;
}
nextRow->GetNextSibling(&nextRow);
}
// resize the cell's height
nsSize cellFrameSize;
cellFrame->GetSize(cellFrameSize);
//if (cellFrameSize.height!=cellHeight)
{
cellFrame->SizeTo(cellFrameSize.width, cellHeight);
// realign cell content based on the new height
/*nsHTMLReflowMetrics desiredSize(nsnull);
nsHTMLReflowState kidReflowState(aPresContext, aReflowState,
cellFrame,
nsSize(cellFrameSize.width, cellHeight),
eReflowReason_Resize);*/
//XXX: the following reflow is necessary for any content of the cell
// whose height is a percent of the cell's height (maybe indirectly.)
// But some content crashes when this reflow is issued, to be investigated
//XXX nsReflowStatus status;
//ReflowChild(cellFrame, aPresContext, desiredSize, kidReflowState, status);
((nsTableCellFrame *)cellFrame)->VerticallyAlignChild();
/* if we're collapsing borders, notify the cell that the border edge length has changed */
if (NS_STYLE_BORDER_COLLAPSE == tableFrame->GetBorderCollapseStyle()) {
((nsTableCellFrame *)(cellFrame))->SetBorderEdgeLength(NS_SIDE_LEFT,
GetRowIndex(),
cellHeight);
((nsTableCellFrame *)(cellFrame))->SetBorderEdgeLength(NS_SIDE_RIGHT,
GetRowIndex(),
cellHeight);
}
}
}
// Get the next cell
cellFrame = iter.Next();
}
// Let our base class do the usual work
}
void nsTableRowFrame::ResetMaxChildHeight()
{
mTallestCell=0;
mCellMaxTopMargin=0;
mCellMaxBottomMargin=0;
}
void nsTableRowFrame::SetMaxChildHeight(nscoord aChildHeight, nscoord aTopMargin, nscoord aBottomMargin)
{
if (mTallestCell<aChildHeight)
mTallestCell = aChildHeight;
if (mCellMaxTopMargin<aTopMargin)
mCellMaxTopMargin = aTopMargin;
if (mCellMaxBottomMargin<aBottomMargin)
mCellMaxBottomMargin = aBottomMargin;
}
/*
const nsStyleColor* myColor =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
if (nsnull != myColor) {
nsRect rect(0, 0, mRect.width, mRect.height);
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *myColor);
}
*/
static
PRBool IsFirstRow(nsTableFrame& aTable,
nsTableRowFrame& aRow)
{
nsIFrame* firstRowGroup = nsnull;
aTable.FirstChild(nsnull, &firstRowGroup);
nsIFrame* rowGroupFrame = nsnull;
nsresult rv = aRow.GetParent(&rowGroupFrame);
if (NS_SUCCEEDED(rv) && (rowGroupFrame == firstRowGroup)) {
nsIFrame* firstRow;
rowGroupFrame->FirstChild(nsnull, &firstRow);
return (&aRow == firstRow);
}
return PR_FALSE;
}
NS_METHOD nsTableRowFrame::Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
nsresult rv;
if (NS_FRAME_PAINT_LAYER_BACKGROUND == aWhichLayer) {
nsCompatibility mode;
aPresContext.GetCompatibilityMode(&mode);
if (eCompatibility_Standard == mode) {
const nsStyleDisplay* disp =
(const nsStyleDisplay*)mStyleContext->GetStyleData(eStyleStruct_Display);
if (disp->mVisible) {
const nsStyleSpacing* spacing =
(const nsStyleSpacing*)mStyleContext->GetStyleData(eStyleStruct_Spacing);
const nsStyleColor* color =
(const nsStyleColor*)mStyleContext->GetStyleData(eStyleStruct_Color);
nsTableFrame* tableFrame = nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (NS_FAILED(rv) || (nsnull == tableFrame)) {
return rv;
}
nscoord cellSpacingX = tableFrame->GetCellSpacingX();
nscoord halfCellSpacingY =
NSToCoordRound(((float)tableFrame->GetCellSpacingY()) / (float)2);
// every row is short by the ending cell spacing X
nsRect rect(0, 0, mRect.width + cellSpacingX, mRect.height);
// first row may have gotten too much cell spacing Y
if (tableFrame->GetRowCount() != 1) {
if (IsFirstRow(*tableFrame, *this)) {
rect.height -= halfCellSpacingY;
}
else {
rect.height += halfCellSpacingY;
rect.y -= halfCellSpacingY;
}
}
nsCSSRendering::PaintBackground(aPresContext, aRenderingContext, this,
aDirtyRect, rect, *color, *spacing, 0, 0);
}
}
}
// 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);
}
PaintChildren(aPresContext, aRenderingContext, aDirtyRect, aWhichLayer);
return NS_OK;
}
PRIntn
nsTableRowFrame::GetSkipSides() const
{
PRIntn skip = 0;
if (nsnull != mPrevInFlow) {
skip |= 1 << NS_SIDE_TOP;
}
if (nsnull != mNextInFlow) {
skip |= 1 << NS_SIDE_BOTTOM;
}
return skip;
}
/** overloaded method from nsContainerFrame. The difference is that
* we don't want to clip our children, so a cell can do a rowspan
*/
void nsTableRowFrame::PaintChildren(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer)
{
nsIFrame* kid = mFrames.FirstChild();
while (nsnull != kid) {
nsIView *pView;
kid->GetView(&pView);
if (nsnull == pView) {
nsRect kidRect;
kid->GetRect(kidRect);
nsRect damageArea;
PRBool overlap = damageArea.IntersectRect(aDirtyRect, kidRect);
if (overlap) {
PRBool clipState;
// 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);
if ((NS_FRAME_PAINT_LAYER_DEBUG == aWhichLayer) &&
GetShowFrameBorders()) {
aRenderingContext.SetColor(NS_RGB(255,0,0));
aRenderingContext.DrawRect(0, 0, kidRect.width, kidRect.height);
}
aRenderingContext.PopState(clipState);
}
}
kid->GetNextSibling(&kid);
}
}
/** returns the height of the tallest child in this row (ignoring any cell with rowspans) */
nscoord nsTableRowFrame::GetTallestChild() const
{
return mTallestCell;
}
nscoord nsTableRowFrame::GetChildMaxTopMargin() const
{
return mCellMaxTopMargin;
}
nscoord nsTableRowFrame::GetChildMaxBottomMargin() const
{
return mCellMaxBottomMargin;
}
PRInt32 nsTableRowFrame::GetMaxColumns() const
{
int sum = 0;
nsIFrame *cell=mFrames.FirstChild();
while (nsnull!=cell)
{
const nsStyleDisplay *kidDisplay;
cell->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay)
{
sum += ((nsTableCellFrame *)cell)->GetColSpan();
}
cell->GetNextSibling(&cell);
}
return sum;
}
/* GetMinRowSpan is needed for deviant cases where every cell in a row has a rowspan > 1.
* It sets mMinRowSpan, which is used in FixMinCellHeight and PlaceChild
*/
void nsTableRowFrame::GetMinRowSpan(nsTableFrame *aTableFrame)
{
PRInt32 minRowSpan=-1;
nsIFrame *frame=mFrames.FirstChild();
while (nsnull!=frame)
{
const nsStyleDisplay *kidDisplay;
frame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay)
{
PRInt32 rowSpan = aTableFrame->GetEffectiveRowSpan(mRowIndex, ((nsTableCellFrame *)frame));
if (-1==minRowSpan)
minRowSpan = rowSpan;
else if (minRowSpan>rowSpan)
minRowSpan = rowSpan;
}
frame->GetNextSibling(&frame);
}
mMinRowSpan = minRowSpan;
}
void nsTableRowFrame::FixMinCellHeight(nsTableFrame *aTableFrame)
{
nsIFrame *frame=mFrames.FirstChild();
while (nsnull!=frame)
{
const nsStyleDisplay *kidDisplay;
frame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay)
{
PRInt32 rowSpan = aTableFrame->GetEffectiveRowSpan(mRowIndex, ((nsTableCellFrame *)frame));
if (mMinRowSpan==rowSpan)
{
nsRect rect;
frame->GetRect(rect);
if (rect.height > mTallestCell)
mTallestCell = rect.height;
}
}
frame->GetNextSibling(&frame);
}
}
// Position and size aKidFrame and update our reflow state. The origin of
// aKidRect is relative to the upper-left origin of our frame, and includes
// any left/top margin.
void nsTableRowFrame::PlaceChild(nsIPresContext& aPresContext,
RowReflowState& aReflowState,
nsIFrame* aKidFrame,
const nsRect& aKidRect,
nsSize* aMaxElementSize,
nsSize* aKidMaxElementSize)
{
// Place and size the child
aKidFrame->SetRect(aKidRect);
// update the running total for the row width
aReflowState.x += aKidRect.width;
// Update the maximum element size
PRInt32 rowSpan = aReflowState.tableFrame->GetEffectiveRowSpan((nsTableCellFrame*)aKidFrame);
if (nsnull != aMaxElementSize) {
aMaxElementSize->width += aKidMaxElementSize->width;
if (1 == rowSpan) {
aMaxElementSize->height = PR_MAX(aMaxElementSize->height, aKidMaxElementSize->height);
}
}
// XXX this will be fixed when row spans deal with dead rows
#if 0
// this accounts for cases where all cells in a row have a rowspan>1
// XXX "numColsInThisRow==numColsInTable" probably isn't the right metric to use here
// the point is to skip a cell who's span effects another row, maybe use cellmap?
PRInt32 numColsInThisRow = GetMaxColumns();
PRInt32 numColsInTable = aReflowState.tableFrame->GetColCount();
if ((1==rowSpan) || (mMinRowSpan == rowSpan && numColsInThisRow==numColsInTable))
{
// Update maxCellHeight
if (aKidRect.height > aReflowState.maxCellHeight)
aReflowState.maxCellHeight = aKidRect.height;
// Update maxCellVertSpace
nsMargin margin;
if (aReflowState.tableFrame->GetCellMarginData((nsTableCellFrame *)aKidFrame, margin) == NS_OK)
{
nscoord height = aKidRect.height + margin.top + margin.bottom;
if (height > aReflowState.maxCellVertSpace)
aReflowState.maxCellVertSpace = height;
}
}
#else
if (1 == rowSpan) {
// Update maxCellHeight
if (aKidRect.height > aReflowState.maxCellHeight)
aReflowState.maxCellHeight = aKidRect.height;
// Update maxCellVertSpace
nsMargin margin;
if (aReflowState.tableFrame->GetCellMarginData((nsTableCellFrame *)aKidFrame, margin) == NS_OK) {
nscoord height = aKidRect.height + margin.top + margin.bottom;
if (height > aReflowState.maxCellVertSpace)
aReflowState.maxCellVertSpace = height;
}
}
#endif
}
// Calculate the cell's actual size given its pass2 desired width and height.
// Takes into account the specified height (in the style), and any special logic
// needed for backwards compatibility.
// Modifies the desired width and height that are passed in.
nsresult
nsTableRowFrame::CalculateCellActualSize(RowReflowState& aReflowState,
nsIFrame* aCellFrame,
nscoord& aDesiredWidth,
nscoord& aDesiredHeight,
nscoord aAvailWidth)
{
nscoord specifiedHeight = 0;
const nsStylePosition* position;
// Get the height specified in the style information
aCellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)position);
switch (position->mHeight.GetUnit()) {
case eStyleUnit_Coord:
specifiedHeight = position->mHeight.GetCoordValue();
break;
case eStyleUnit_Percent:
{
nsTableFrame* table = nsnull;
nsTableFrame::GetTableFrame(this, table);
if (table) {
nscoord basis = table->GetPercentBasisForRows();
if (basis > 0) {
float percent = position->mHeight.GetPercentValue();
specifiedHeight = NSToCoordRound(percent * ((float)basis));
}
}
break;
}
case eStyleUnit_Inherit:
// XXX for now, do nothing
default:
case eStyleUnit_Auto:
break;
}
// If the specified height is greater than the desired height, then use the
// specified height
if (specifiedHeight > aDesiredHeight)
aDesiredHeight = specifiedHeight;
// begin special Nav4 compatibility code for the width
if (0 == aDesiredWidth)
{
aDesiredWidth = aAvailWidth;
}
// end special Nav4 compatibility code
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
nscoord
nsTableRowFrame::CalculateCellAvailableWidth(nsTableFrame* aTableFrame,
nsIFrame* aCellFrame,
PRInt32 aCellColIndex,
PRInt32 aNumColSpans,
nscoord aCellSpacingX)
{
nscoord availWidth = 0;
for (PRInt32 index = 0; index < aNumColSpans; index++) {
// Add in the width of this column
availWidth += aTableFrame->GetColumnWidth(aCellColIndex + index);
// If the cell spans columns, then for all columns except the first column
// add in the column spacing
if ((index != 0) && (aTableFrame->GetNumCellsOriginatingInCol(aCellColIndex + index) > 0)) {
availWidth += aCellSpacingX;
}
}
return availWidth;
}
/**
* Called for a resize reflow. Typically because the column widths have
* changed. Reflows all the existing table cell frames unless aDirtyOnly
* is PR_TRUE in which case only reflow the dirty frames
*/
NS_METHOD nsTableRowFrame::ResizeReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
PRBool aDirtyOnly)
{
aStatus = NS_FRAME_COMPLETE;
if (nsnull == mFrames.FirstChild()) {
return NS_OK;
}
nsresult rv=NS_OK;
nsSize kidMaxElementSize;
nsSize* pKidMaxElementSize = (nsnull != aDesiredSize.maxElementSize) ?
&kidMaxElementSize : nsnull;
nscoord maxCellTopMargin = 0;
nscoord maxCellBottomMargin = 0;
nscoord cellSpacingX = aReflowState.tableFrame->GetCellSpacingX();
PRInt32 cellColSpan=1; // must be defined here so it's set properly for non-cell kids
PRInt32 prevColIndex; // remember the col index of the previous cell to handle rowspans into this row
nsTableIteration dir = (aReflowState.reflowState.availableWidth == NS_UNCONSTRAINEDSIZE)
? eTableLTR : eTableDIR;
nsTableIterator iter(*this, dir);
if (iter.IsLeftToRight()) {
prevColIndex = -1;
}
else {
nsTableFrame* tableFrame = nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (NS_FAILED(rv) || (nsnull == tableFrame)) {
return rv;
}
prevColIndex = tableFrame->GetColCount();
}
// Reflow each of our existing cell frames
nsIFrame* kidFrame = iter.First();
while (nsnull != kidFrame) {
// Get the frame state bits
nsFrameState frameState;
kidFrame->GetFrameState(&frameState);
// See if we should only reflow the dirty child frames
PRBool doReflowChild = PR_TRUE;
if (aDirtyOnly) {
if ((frameState & NS_FRAME_IS_DIRTY) == 0) {
doReflowChild = PR_FALSE;
}
}
// Reflow the child frame
if (doReflowChild) {
const nsStyleDisplay *kidDisplay;
kidFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay) {
PRInt32 cellColIndex;
((nsTableCellFrame *)kidFrame)->GetColIndex(cellColIndex);
cellColSpan = aReflowState.tableFrame->GetEffectiveColSpan(cellColIndex,
((nsTableCellFrame *)kidFrame));
nsMargin kidMargin;
aReflowState.tableFrame->GetCellMarginData((nsTableCellFrame *)kidFrame,kidMargin);
if (kidMargin.top > maxCellTopMargin)
maxCellTopMargin = kidMargin.top;
if (kidMargin.bottom > maxCellBottomMargin)
maxCellBottomMargin = kidMargin.bottom;
// Compute the x-origin for the child, taking into account straddlers (cells from prior
// rows with rowspans > 1)
// if this cell is not immediately adjacent to the previous cell, factor in missing col info
if (iter.IsLeftToRight()) {
if (prevColIndex != (cellColIndex - 1)) {
for (PRInt32 colIndex = prevColIndex + 1; cellColIndex > colIndex; colIndex++) {
aReflowState.x += aReflowState.tableFrame->GetColumnWidth(colIndex);
if (aReflowState.tableFrame->GetNumCellsOriginatingInCol(colIndex) > 0) {
aReflowState.x += cellSpacingX;
}
}
}
}
else {
if (prevColIndex != cellColIndex + cellColSpan) {
PRInt32 lastCol = cellColIndex + cellColSpan - 1;
for (PRInt32 colIndex = prevColIndex - 1; colIndex > lastCol; colIndex--) {
aReflowState.x += aReflowState.tableFrame->GetColumnWidth(colIndex);
if (aReflowState.tableFrame->GetNumCellsOriginatingInCol(colIndex) > 0) {
aReflowState.x += cellSpacingX;
}
}
}
}
aReflowState.x += cellSpacingX;
// Calculate the available width for the table cell using the known
// column widths
nscoord availWidth = CalculateCellAvailableWidth(aReflowState.tableFrame,
kidFrame, cellColIndex,
cellColSpan, cellSpacingX);
// remember the rightmost (ltr) or leftmost (rtl) column this cell spans into
prevColIndex = (iter.IsLeftToRight()) ? cellColIndex + (cellColSpan - 1) : cellColIndex;
nsHTMLReflowMetrics desiredSize(pKidMaxElementSize);
// If the available width is the same as last time we reflowed the cell,
// then just use the previous desired size and max element size.
// if we need the max-element-size we don't need to reflow.
// we just grab it from the cell frame which remembers it (see the else clause below).
// Note: we can't do that optimization if our height is constrained or the
// cell frame has a next-in-flow
nsIFrame* kidNextInFlow;
kidFrame->GetNextInFlow(&kidNextInFlow);
if ((aReflowState.reflowState.availableHeight != NS_UNCONSTRAINEDSIZE) ||
(availWidth != ((nsTableCellFrame *)kidFrame)->GetPriorAvailWidth()) ||
(nsnull != kidNextInFlow))
{
// Reflow the cell to fit the available height
nsSize kidAvailSize(availWidth, aReflowState.reflowState.availableHeight);
// If it's a dirty frame, then check whether it's the initial reflow
nsReflowReason reason = eReflowReason_Resize;
if (aDirtyOnly) {
if (frameState & NS_FRAME_FIRST_REFLOW) {
// Newly inserted frame
reason = eReflowReason_Initial;
// Use an unconstrained width so we can get the child's maximum
// width
// XXX What about fixed layout tables?
kidAvailSize.SizeTo(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
}
}
// Reflow the child
nsHTMLReflowState kidReflowState(aPresContext,
aReflowState.reflowState, kidFrame,
kidAvailSize,
reason);
nsReflowStatus status;
rv = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState, status);
#ifdef NS_DEBUG
if (desiredSize.width > availWidth)
{
printf("WARNING: cell returned desired width %d given avail width %d\n",
desiredSize.width, availWidth);
}
#endif
if (eReflowReason_Initial == reason) {
// Save the pass1 reflow information
((nsTableCellFrame *)kidFrame)->SetPass1DesiredSize(desiredSize);
((nsTableCellFrame *)kidFrame)->SetPass1MaxElementSize(kidMaxElementSize);
}
// 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
{
nsSize priorSize = ((nsTableCellFrame *)kidFrame)->GetDesiredSize();
desiredSize.width = priorSize.width;
desiredSize.height = priorSize.height;
if (nsnull != pKidMaxElementSize)
*pKidMaxElementSize = ((nsTableCellFrame *)kidFrame)->GetPass1MaxElementSize();
}
// Calculate the cell's actual size given its pass2 size. This function
// takes into account the specified height (in the style), and any special
// logic needed for backwards compatibility
CalculateCellActualSize(aReflowState, kidFrame, desiredSize.width,
desiredSize.height, availWidth);
// Place the child
nsRect kidRect (aReflowState.x, kidMargin.top, desiredSize.width,
desiredSize.height);
PlaceChild(aPresContext, aReflowState, kidFrame, kidRect,
aDesiredSize.maxElementSize, pKidMaxElementSize);
}
else
{// it's an unknown frame type, give it a generic reflow and ignore the results
nsHTMLReflowState kidReflowState(aPresContext, aReflowState.reflowState,
kidFrame,
nsSize(0,0), eReflowReason_Resize);
nsHTMLReflowMetrics desiredSize(nsnull);
nsReflowStatus status;
ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState, status);
}
}
kidFrame = iter.Next(); // Get the next child
// if this was the last child, and it had a colspan>1, add in the cellSpacing for the colspan
// if the last kid wasn't a colspan, then we still have the colspan of the last real cell
if ((nsnull==kidFrame) && (cellColSpan>1))
aReflowState.x += cellSpacingX;
}
SetMaxChildHeight(aReflowState.maxCellHeight,maxCellTopMargin, maxCellBottomMargin); // remember height of tallest child who doesn't have a row span
// Return our desired size. Note that our desired width is just whatever width
// we were given by the row group frame
aDesiredSize.width = aReflowState.x;
aDesiredSize.height = aReflowState.maxCellVertSpace;
#ifdef DEBUG
nscoord overAllocated = aDesiredSize.width - aReflowState.reflowState.availableWidth;
if (overAllocated > 0) {
float p2t;
aPresContext.GetScaledPixelsToTwips(&p2t);
if (overAllocated > p2t) {
printf("row over allocated by %d twips", overAllocated);
}
}
#endif
return rv;
}
/**
* Called for the initial reflow. Creates each table cell frame, and
* reflows it to gets its minimum and maximum sizes
*/
NS_METHOD
nsTableRowFrame::InitialReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableCellFrame * aStartFrame,
PRBool aDoSiblings)
{
// Place our children, one at a time, until we are out of children
nsSize kidMaxElementSize(0,0);
nscoord maxTopMargin = 0;
nscoord maxBottomMargin = 0;
nscoord x = 0;
PRBool tableLayoutStrategy=NS_STYLE_TABLE_LAYOUT_AUTO;
nsTableFrame* table = aReflowState.tableFrame;
nsresult rv = NS_OK;
const nsStyleTable* tableStyle;
table->GetStyleData(eStyleStruct_Table, (const nsStyleStruct *&)tableStyle);
tableLayoutStrategy = tableStyle->mLayoutStrategy;
nsIFrame* kidFrame;
if (nsnull==aStartFrame)
kidFrame = mFrames.FirstChild();
else
kidFrame = aStartFrame;
for ( ; nsnull != kidFrame; kidFrame->GetNextSibling(&kidFrame))
{
const nsStyleDisplay *kidDisplay;
kidFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay)
{
// Get the child's margins
nsMargin margin;
nscoord topMargin = 0;
if (aReflowState.tableFrame->GetCellMarginData((nsTableCellFrame *)kidFrame, margin) == NS_OK)
{
topMargin = margin.top;
}
maxTopMargin = PR_MAX(margin.top, maxTopMargin);
maxBottomMargin = PR_MAX(margin.bottom, maxBottomMargin);
// get border padding values
nsMargin borderPadding;
const nsStyleSpacing* cellSpacingStyle;
kidFrame->GetStyleData(eStyleStruct_Spacing , ((const nsStyleStruct *&)cellSpacingStyle));
cellSpacingStyle->CalcBorderPaddingFor(kidFrame, borderPadding);
// For the initial reflow always allow the child to be as high as it
// wants. The default available width is also unconstrained so we can
// get the child's maximum width
nsSize kidAvailSize;
nsHTMLReflowMetrics kidSize(nsnull);
if (NS_STYLE_TABLE_LAYOUT_AUTO==tableLayoutStrategy)
{
kidAvailSize.SizeTo(NS_UNCONSTRAINEDSIZE, NS_UNCONSTRAINEDSIZE);
kidSize.maxElementSize=&kidMaxElementSize;
}
else
{
PRInt32 colIndex;
((nsTableCellFrame *)kidFrame)->GetColIndex(colIndex);
kidAvailSize.SizeTo(table->GetColumnWidth(colIndex), NS_UNCONSTRAINEDSIZE);
}
nsHTMLReflowState kidReflowState(aPresContext,
aReflowState.reflowState,
kidFrame, kidAvailSize,
eReflowReason_Initial);
rv = ReflowChild(kidFrame, aPresContext, kidSize, kidReflowState, aStatus);
// the following signals bugs in the content frames.
if (kidMaxElementSize.width > kidSize.width) {
printf("WARNING - table cell content max element width %d greater than desired width %d\n",
kidMaxElementSize.width, kidSize.width);
kidSize.width = kidMaxElementSize.width;
}
if (kidMaxElementSize.height > kidSize.height) {
printf("Warning - table cell content max element height %d greater than desired height %d\n",
kidMaxElementSize.height, kidSize.height);
kidSize.height = kidMaxElementSize.height;
}
((nsTableCellFrame *)kidFrame)->SetPass1DesiredSize(kidSize);
((nsTableCellFrame *)kidFrame)->SetPass1MaxElementSize(kidMaxElementSize);
NS_ASSERTION(NS_FRAME_IS_COMPLETE(aStatus), "unexpected child reflow status");
// Place the child
x += margin.left;
nsRect kidRect(x, topMargin, kidSize.width, kidSize.height);
PlaceChild(aPresContext, aReflowState, kidFrame, kidRect, aDesiredSize.maxElementSize,
&kidMaxElementSize);
x += kidSize.width + margin.right;
}
else
{// it's an unknown frame type, give it a generic reflow and ignore the results
nsHTMLReflowState kidReflowState(aPresContext, aReflowState.reflowState,
kidFrame, nsSize(0,0), eReflowReason_Initial);
nsHTMLReflowMetrics desiredSize(nsnull);
ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState, aStatus);
}
if (PR_FALSE==aDoSiblings)
break;
}
SetMaxChildHeight(aReflowState.maxCellHeight, maxTopMargin, maxBottomMargin); // remember height of tallest child who doesn't have a row span
// Return our desired size
aDesiredSize.width = x;
aDesiredSize.height = aReflowState.maxCellVertSpace;
return rv;
}
// Recover the reflow state to what it should be if aKidFrame is about
// to be reflowed
//
// The things in the RowReflowState object we need to restore are:
// - maxCellHeight
// - maxVertCellSpace
// - x
NS_METHOD nsTableRowFrame::RecoverState(nsIPresContext& aPresContext,
RowReflowState& aReflowState,
nsIFrame* aKidFrame,
nscoord& aMaxCellTopMargin,
nscoord& aMaxCellBottomMargin,
nsSize* aMaxElementSize)
{
// Initialize OUT parameters
aMaxCellTopMargin = aMaxCellBottomMargin = 0;
if (aMaxElementSize) {
aMaxElementSize->width = 0;
aMaxElementSize->height = 0;
}
// Walk the child frames (except aKidFrame) and find the table cell frames
for (nsIFrame* frame = mFrames.FirstChild(); frame; frame->GetNextSibling(&frame)) {
if (frame != aKidFrame) {
// See if the frame is a table cell frame
const nsStyleDisplay *kidDisplay;
frame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)kidDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == kidDisplay->mDisplay) {
nsMargin kidMargin;
// Update the max top and bottom margins
aReflowState.tableFrame->GetCellMarginData((nsTableCellFrame *)frame, kidMargin);
if (kidMargin.top > aMaxCellTopMargin)
aMaxCellTopMargin = kidMargin.top;
if (kidMargin.bottom > aMaxCellBottomMargin)
aMaxCellBottomMargin = kidMargin.bottom;
// Update maxCellHeight and maxVertCellSpace. When determining this we
// don't include cells that span rows
PRInt32 rowSpan = aReflowState.tableFrame->GetEffectiveRowSpan(mRowIndex, ((nsTableCellFrame *)frame));
if (mMinRowSpan == rowSpan) {
// Get the cell's desired height the last time it was reflowed
nsSize desiredSize = ((nsTableCellFrame *)frame)->GetDesiredSize();
// See if it has a specified height that overrides the desired size.
// Note: we don't care about the width so don't compute the column
// width and just pass in the desired width for the available width
CalculateCellActualSize(aReflowState, frame, desiredSize.width, desiredSize.height,
desiredSize.width);
// Update maxCellHeight
if (desiredSize.height > aReflowState.maxCellHeight) {
aReflowState.maxCellHeight = desiredSize.height;
}
// Update maxCellVertHeight
nscoord vertHeight = desiredSize.height + kidMargin.top + kidMargin.bottom;
if (vertHeight > aReflowState.maxCellVertSpace) {
aReflowState.maxCellVertSpace = vertHeight;
}
}
// Recover the max element size if requested
if (aMaxElementSize) {
nsSize kidMaxElementSize = ((nsTableCellFrame *)frame)->GetPass1MaxElementSize();
aMaxElementSize->width += kidMaxElementSize.width;
if (1 == rowSpan) {
aMaxElementSize->height = PR_MAX(aMaxElementSize->height, kidMaxElementSize.height);
}
}
}
}
}
// Update the running x-offset based on the frame's current x-origin
nsPoint origin;
aKidFrame->GetOrigin(origin);
aReflowState.x = origin.x;
return NS_OK;
}
NS_METHOD nsTableRowFrame::IncrementalReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& 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 ((PR_TRUE==NS_SUCCEEDED(rv)) && (nsnull!=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_METHOD nsTableRowFrame::IR_TargetIsMe(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus)
{
nsresult rv = NS_FRAME_COMPLETE;
nsIReflowCommand::ReflowType type;
aReflowState.reflowState.reflowCommand->GetType(type);
nsIFrame *objectFrame;
aReflowState.reflowState.reflowCommand->GetChildFrame(objectFrame);
const nsStyleDisplay *childDisplay=nsnull;
if (nsnull!=objectFrame)
objectFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)childDisplay));
switch (type)
{
case nsIReflowCommand::ReflowDirty:
{
// Reflow the dirty child frames. Typically this is newly added frames.
// XXX What we really should do is do a pass-1 reflow of newly added
// frames (only if necessary, i.e., the table isn't fixed layout), then
// see if column widtsh changed and decide whether to do the pass-2 reflow
// of just the dirty rows or have the table rebalance column widths and
// do a pass-2 reflow of all rows
rv = ResizeReflow(aPresContext, aDesiredSize, aReflowState, aStatus, PR_TRUE);
// If any column widths have to change due to this, rebalance column widths.
// XXX need to calculate this, but for now just do it
aReflowState.tableFrame->InvalidateColumnWidths();
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;
}
return rv;
}
NS_METHOD nsTableRowFrame::IR_StyleChanged(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& 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->InvalidateFirstPassCache();
return rv;
}
NS_METHOD nsTableRowFrame::IR_TargetIsChild(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame * aNextFrame)
{
nsresult rv;
const nsStyleDisplay *childDisplay;
aNextFrame->GetStyleData(eStyleStruct_Display, ((const nsStyleStruct *&)childDisplay));
if (NS_STYLE_DISPLAY_TABLE_CELL == childDisplay->mDisplay)
{
// Recover our reflow state
nscoord maxCellTopMargin, maxCellBottomMargin;
RecoverState(aPresContext, aReflowState, aNextFrame, maxCellTopMargin,
maxCellBottomMargin, aDesiredSize.maxElementSize);
// Get the frame's margins
nsMargin kidMargin;
aReflowState.tableFrame->GetCellMarginData((nsTableCellFrame *)aNextFrame, kidMargin);
if (kidMargin.top > maxCellTopMargin)
maxCellTopMargin = kidMargin.top;
if (kidMargin.bottom > maxCellBottomMargin)
maxCellBottomMargin = kidMargin.bottom;
// At this point, we know the column widths. Compute the cell available width
PRInt32 cellColIndex;
((nsTableCellFrame *)aNextFrame)->GetColIndex(cellColIndex);
PRInt32 cellColSpan = aReflowState.tableFrame->GetEffectiveColSpan(cellColIndex,
((nsTableCellFrame *)aNextFrame));
nscoord cellSpacingX = aReflowState.tableFrame->GetCellSpacingX();
nscoord cellAvailWidth = CalculateCellAvailableWidth(aReflowState.tableFrame, aNextFrame,
cellColIndex, cellColSpan, cellSpacingX);
// Always let the cell be as high as it wants. We ignore the height that's
// passed in and always place the entire row. Let the row group decide
// whether we fit or wehther the entire row is pushed
nsSize kidAvailSize(cellAvailWidth, NS_UNCONSTRAINEDSIZE);
// Pass along the reflow command
nsSize kidMaxElementSize;
nsHTMLReflowMetrics desiredSize(&kidMaxElementSize);
nsHTMLReflowState kidReflowState(aPresContext,
aReflowState.reflowState,
aNextFrame, kidAvailSize);
// Remember the current desired size, we'll need it later
nsSize oldMinSize = ((nsTableCellFrame*)aNextFrame)->GetPass1MaxElementSize();
nsSize oldDesiredSize = ((nsTableCellFrame*)aNextFrame)->GetPass1DesiredSize();
// Reflow the cell passing it the incremental reflow command. We can't pass
// in a max width of NS_UNCONSTRAINEDSIZE, because the max width must match
// the width of the previous reflow...
rv = ReflowChild(aNextFrame, aPresContext, desiredSize, kidReflowState, aStatus);
//XXX: this is a hack, shouldn't it be the case that a min size is
// never larger than a desired size?
if (kidMaxElementSize.width>desiredSize.width)
desiredSize.width = kidMaxElementSize.width;
if (kidMaxElementSize.height>desiredSize.height)
desiredSize.height = kidMaxElementSize.height;
// Update the cell layout data.
((nsTableCellFrame *)aNextFrame)->SetPass1MaxElementSize(kidMaxElementSize);
// Now see if we need to do the regular pass 1 reflow and gather the preferred
// width. If the new minimum width is different from the old minimum width,
// then we should consider the max element size
if (aReflowState.tableFrame->ColumnsCanBeInvalidatedBy(*(nsTableCellFrame*)aNextFrame,
oldMinSize.width != kidMaxElementSize.width)) {
// For fixed-layout tables we don't need to know the preferred width
if (aReflowState.tableFrame->RequiresPass1Layout()) {
#ifdef DEBUG_troy
// Changes to the cell frame could require the columns to be rebalanced.
// XXX We don't really need to compute the max element size again, we just
// computed it above. However, for the time being do compute it again and
// make sure it's consistent...
nscoord prevMaxElementWidth = kidMaxElementSize.width;
#endif
// Do the unconstrained reflow and get the pass1 information
// XXX Why the reflow reason of eReflowReason_Initial?
kidReflowState.reason = eReflowReason_Initial;
kidReflowState.reflowCommand = nsnull;
kidReflowState.availableWidth = NS_UNCONSTRAINEDSIZE;
rv = ReflowChild(aNextFrame, aPresContext, desiredSize, kidReflowState, aStatus);
//XXX: this is a hack, shouldn't it be the case that a min size is
// never larger than a desired size?
if (kidMaxElementSize.width>desiredSize.width)
desiredSize.width = kidMaxElementSize.width;
if (kidMaxElementSize.height>desiredSize.height)
desiredSize.height = kidMaxElementSize.height;
#ifdef DEBUG_troy
// XXX See above
NS_ASSERTION(prevMaxElementWidth == kidMaxElementSize.width,
"different max element width!");
#else
((nsTableCellFrame *)aNextFrame)->SetPass1MaxElementSize(kidMaxElementSize);
#endif
// Update the cell layout data.
((nsTableCellFrame *)aNextFrame)->SetPass1DesiredSize(desiredSize);
}
// Now that we know the minimum and preferred widths see if the column
// widths need to be rebalanced
if (aReflowState.tableFrame->ColumnsAreValidFor(*(nsTableCellFrame*)aNextFrame,
oldMinSize.width,
oldDesiredSize.width)) {
// The column widths don't need to be rebalanced. Now reflow the cell
// again this time constraining the width back to the column width again
kidReflowState.reason = eReflowReason_Resize;
kidReflowState.availableWidth = cellAvailWidth;
rv = ReflowChild(aNextFrame, aPresContext, desiredSize, kidReflowState, aStatus);
} else {
// The column widths need to be rebalanced, so don't waste time reflowing
// the cell again. Tell the table to rebalance the column widths
aReflowState.tableFrame->InvalidateColumnWidths();
}
}
// Calculate the cell's actual size given its pass2 size. This function
// takes into account the specified height (in the style), and any special
// logic needed for backwards compatibility
CalculateCellActualSize(aReflowState, aNextFrame, desiredSize.width, desiredSize.height,
cellAvailWidth);
// Now place the child
nsRect kidRect (aReflowState.x, kidMargin.top, desiredSize.width,
desiredSize.height);
PlaceChild(aPresContext, aReflowState, aNextFrame, kidRect,
aDesiredSize.maxElementSize, &kidMaxElementSize);
SetMaxChildHeight(aReflowState.maxCellHeight, maxCellTopMargin,
maxCellBottomMargin);
// Return our desired size. Note that our desired width is just whatever width
// we were given by the row group frame
aDesiredSize.width = aReflowState.availSize.width;
aDesiredSize.height = aReflowState.maxCellVertSpace;
}
else
{ // pass reflow to unknown frame child
// aDesiredSize does not change
}
return rv;
}
/** Layout the entire row.
* This method stacks cells horizontally according to HTML 4.0 rules.
*/
NS_METHOD
nsTableRowFrame::Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
if (nsDebugTable::gRflRow) nsTableFrame::DebugReflow("TR::Rfl en", this, &aReflowState, nsnull);
nsresult rv = NS_OK;
// Initialize 'out' parameters (aStatus set below, undefined if rv returns an error)
if (nsnull != aDesiredSize.maxElementSize) {
aDesiredSize.maxElementSize->width = 0;
aDesiredSize.maxElementSize->height = 0;
}
// Initialize our internal data
ResetMaxChildHeight();
// Create a reflow state
nsTableFrame *tableFrame=nsnull;
rv = nsTableFrame::GetTableFrame(this, tableFrame);
if (NS_FAILED(rv) || nsnull==tableFrame)
return rv;
RowReflowState state(aReflowState, tableFrame);
// Do the reflow
// XXX If the width is unconstrained, then treat it like we would treat the
// initial reflow instead. This needs to be cleaned up
nsReflowReason reason = aReflowState.reason;
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableWidth) {
reason = eReflowReason_Initial;
}
switch (reason) {
case eReflowReason_Initial:
rv = InitialReflow(aPresContext, aDesiredSize, state, aStatus, nsnull, PR_TRUE);
if (PR_FALSE==tableFrame->RequiresPass1Layout())
{ // this resize reflow is necessary to place the cells correctly in the case of rowspans and colspans.
// It is very efficient. It does not actually need to pass a reflow down to the cells.
nsSize availSpace(aReflowState.availableWidth, aReflowState.availableHeight);
nsHTMLReflowState resizeReflowState(aPresContext,
(const nsHTMLReflowState&)(*(aReflowState.parentReflowState)),
(nsIFrame *)this,
availSpace,
eReflowReason_Resize);
RowReflowState rowResizeReflowState(resizeReflowState, tableFrame);
rv = ResizeReflow(aPresContext, aDesiredSize, rowResizeReflowState, aStatus);
}
GetMinRowSpan(tableFrame);
FixMinCellHeight(tableFrame);
aStatus = NS_FRAME_COMPLETE;
break;
case eReflowReason_Resize:
case eReflowReason_StyleChange:
rv = ResizeReflow(aPresContext, aDesiredSize, state, aStatus);
break;
case eReflowReason_Incremental:
rv = IncrementalReflow(aPresContext, aDesiredSize, state, aStatus);
break;
}
// If we computed our max element element size, then cache it so we can return
// it later when asked
if (aDesiredSize.maxElementSize) {
mMaxElementSize = *aDesiredSize.maxElementSize;
}
if (nsDebugTable::gRflRow) nsTableFrame::DebugReflow("TR::Rfl ex", this, nsnull, &aDesiredSize);
return rv;
}
/* we overload this here because rows have children that can span outside of themselves.
* so the default "get the child rect, see if it contains the event point" action isn't
* sufficient. We have to ask the row if it has a child that contains the point.
*/
PRBool nsTableRowFrame::Contains(const nsPoint& aPoint)
{
PRBool result = PR_FALSE;
// first, check the row rect and see if the point is in their
if (mRect.Contains(aPoint)) {
result = PR_TRUE;
}
// if that fails, check the cells, they might span outside the row rect
else {
nsIFrame* kid;
FirstChild(nsnull, &kid);
while (nsnull != kid) {
nsRect kidRect;
kid->GetRect(kidRect);
nsPoint point(aPoint);
point.MoveBy(-mRect.x, -mRect.y); // offset the point to check by the row container
if (kidRect.Contains(point)) {
result = PR_TRUE;
break;
}
kid->GetNextSibling(&kid);
}
}
return result;
}
/**
* This function is called by the row group frame's SplitRowGroup() code when
* pushing a row frame that has cell frames that span into it. The cell frame
* should be reflowed with the specified height
*/
void nsTableRowFrame::ReflowCellFrame(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsTableCellFrame* aCellFrame,
nscoord aAvailableHeight,
nsReflowStatus& aStatus)
{
// Reflow the cell frame with the specified height. Use the existing width
nsSize cellSize;
aCellFrame->GetSize(cellSize);
nsSize availSize(cellSize.width, aAvailableHeight);
nsHTMLReflowState cellReflowState(aPresContext, aReflowState, aCellFrame, availSize,
eReflowReason_Resize);
nsHTMLReflowMetrics desiredSize(nsnull);
ReflowChild(aCellFrame, aPresContext, desiredSize, cellReflowState, aStatus);
aCellFrame->SizeTo(cellSize.width, aAvailableHeight);
aCellFrame->VerticallyAlignChild();
}
/**
* This function is called by the row group frame's SplitRowGroup() code when
* it creates a continuing cell frame and wants to insert it into the row's
* child list
*/
void nsTableRowFrame::InsertCellFrame(nsTableCellFrame* aFrame,
nsTableCellFrame* aPrevSibling)
{
mFrames.InsertFrame(nsnull, aPrevSibling, aFrame);
}
NS_IMETHODIMP
nsTableRowFrame::GetFrameType(nsIAtom** aType) const
{
NS_PRECONDITION(nsnull != aType, "null OUT parameter pointer");
*aType = nsLayoutAtoms::tableRowFrame;
NS_ADDREF(*aType);
return NS_OK;
}
/* ----- global methods ----- */
nsresult
NS_NewTableRowFrame(nsIFrame** aNewFrame)
{
NS_PRECONDITION(aNewFrame, "null OUT ptr");
if (nsnull == aNewFrame) {
return NS_ERROR_NULL_POINTER;
}
nsTableRowFrame* it = new nsTableRowFrame;
if (nsnull == it) {
return NS_ERROR_OUT_OF_MEMORY;
}
*aNewFrame = it;
return NS_OK;
}
NS_IMETHODIMP
nsTableRowFrame::GetFrameName(nsString& aResult) const
{
return MakeFrameName("TableRow", aResult);
}
#ifdef DEBUG
NS_IMETHODIMP
nsTableRowFrame::SizeOf(nsISizeOfHandler* aHandler, PRUint32* aResult) const
{
if (!aResult) {
return NS_ERROR_NULL_POINTER;
}
PRUint32 sum = sizeof(*this);
// XXX write me
*aResult = sum;
return NS_OK;
}
#endif