mozilla
/
pjs
зеркало из https://github.com/mozilla/pjs.git
1
0
Форкнуть 0
Код Задачи Пакеты Проекты Релизы Вики Активность
pjs/layout/tables/nsTableRowFrame.cpp

1782 строки
68 KiB
C++
Исходник Ответственный История

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 of 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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsTableRowFrame.h"
#include "nsTableRowGroupFrame.h"
#include "nsIRenderingContext.h"
#include "nsIPresShell.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsHTMLAtoms.h"
#include "nsIContent.h"
#include "nsTableFrame.h"
#include "nsTableCellFrame.h"
#include "nsIView.h"
#include "nsReflowPath.h"
#include "nsCSSRendering.h"
#include "nsLayoutAtoms.h"
#include "nsHTMLParts.h"
#include "nsTableColGroupFrame.h"
#include "nsTableColFrame.h"
#include "nsCOMPtr.h"
#include "nsDisplayList.h"
struct nsTableCellReflowState : public nsHTMLReflowState
{
nsTableCellReflowState(nsPresContext* aPresContext,
const nsHTMLReflowState& aParentReflowState,
nsIFrame* aFrame,
const nsSize& aAvailableSpace,
nsReflowReason aReason);
void FixUp(const nsSize& aAvailSpace,
PRBool aResetComputedWidth);
};
nsTableCellReflowState::nsTableCellReflowState(nsPresContext* aPresContext,
const nsHTMLReflowState& aParentRS,
nsIFrame* aFrame,
const nsSize& aAvailSpace,
nsReflowReason aReason)
:nsHTMLReflowState(aPresContext, aParentRS, aFrame, aAvailSpace, aReason)
{
}
void nsTableCellReflowState::FixUp(const nsSize& aAvailSpace,
PRBool aResetComputedWidth)
{
// fix the mComputed values during a pass 2 reflow since the cell can be a percentage base
if (NS_UNCONSTRAINEDSIZE != aAvailSpace.width) {
if (aResetComputedWidth) {
mComputedWidth = NS_UNCONSTRAINEDSIZE;
}
else if (NS_UNCONSTRAINEDSIZE != mComputedWidth) {
mComputedWidth = aAvailSpace.width - mComputedBorderPadding.left - mComputedBorderPadding.right;
mComputedWidth = PR_MAX(0, mComputedWidth);
}
if (NS_UNCONSTRAINEDSIZE != mComputedHeight) {
if (NS_UNCONSTRAINEDSIZE != aAvailSpace.height) {
mComputedHeight = aAvailSpace.height - mComputedBorderPadding.top - mComputedBorderPadding.bottom;
mComputedHeight = PR_MAX(0, mComputedHeight);
}
}
}
}
void
nsTableRowFrame::InitChildReflowState(nsPresContext& aPresContext,
const nsSize& aAvailSize,
PRBool aBorderCollapse,
float aPixelsToTwips,
nsTableCellReflowState& aReflowState,
PRBool aResetComputedWidth)
{
nsMargin collapseBorder;
nsMargin* pCollapseBorder = nsnull;
if (aBorderCollapse) {
// we only reflow cells, so don't need to check frame type
nsBCTableCellFrame* bcCellFrame = (nsBCTableCellFrame*)aReflowState.frame;
if (bcCellFrame) {
pCollapseBorder = bcCellFrame->GetBorderWidth(aPixelsToTwips, collapseBorder);
}
}
aReflowState.Init(&aPresContext, -1, -1, pCollapseBorder);
aReflowState.FixUp(aAvailSize, aResetComputedWidth);
}
void
nsTableRowFrame::SetFixedHeight(nscoord aValue)
{
nscoord height = PR_MAX(0, aValue);
if (HasFixedHeight()) {
if (height > mStyleFixedHeight) {
mStyleFixedHeight = height;
}
}
else {
mStyleFixedHeight = height;
if (height > 0) {
SetHasFixedHeight(PR_TRUE);
}
}
}
void
nsTableRowFrame::SetPctHeight(float aPctValue,
PRBool aForce)
{
nscoord height = PR_MAX(0, NSToCoordRound(aPctValue * 100.0f));
if (HasPctHeight()) {
if ((height > mStylePctHeight) || aForce) {
mStylePctHeight = height;
}
}
else {
mStylePctHeight = height;
if (height > 0.0f) {
SetHasPctHeight(PR_TRUE);
}
}
}
// 'old' is old cached cell's desired size
// 'new' is new cell's size including style constraints
static PRBool
TallestCellGotShorter(nscoord aOld,
nscoord aNew,
nscoord aTallest)
{
return ((aNew < aOld) && (aOld == aTallest));
}
/* ----------- nsTableRowFrame ---------- */
nsTableRowFrame::nsTableRowFrame(nsStyleContext* aContext)
: nsHTMLContainerFrame(aContext)
{
mBits.mRowIndex = mBits.mFirstInserted = 0;
ResetHeight(0);
#ifdef DEBUG_TABLE_REFLOW_TIMING
mTimer = new nsReflowTimer(this);
#endif
}
nsTableRowFrame::~nsTableRowFrame()
{
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugReflowDone(this);
#endif
}
NS_IMETHODIMP
nsTableRowFrame::Init(nsIContent* aContent,
nsIFrame* aParent,
nsIFrame* aPrevInFlow)
{
nsresult rv;
// Let the base class do its initialization
rv = nsHTMLContainerFrame::Init(aContent, aParent, aPrevInFlow);
// record that children that are ignorable whitespace should be excluded
mState |= NS_FRAME_EXCLUDE_IGNORABLE_WHITESPACE;
if (aPrevInFlow) {
// Set the row index
nsTableRowFrame* rowFrame = (nsTableRowFrame*)aPrevInFlow;
SetRowIndex(rowFrame->GetRowIndex());
}
return rv;
}
NS_IMETHODIMP
nsTableRowFrame::AppendFrames(nsIAtom* aListName,
nsIFrame* aFrameList)
{
NS_ASSERTION(!aListName, "unexpected child list");
// Append the frames
mFrames.AppendFrames(nsnull, aFrameList);
// Add the new cell frames to the table
nsTableFrame *tableFrame = nsTableFrame::GetTableFrame(this);
for (nsIFrame* childFrame = aFrameList; childFrame;
childFrame = childFrame->GetNextSibling()) {
if (IS_TABLE_CELL(childFrame->GetType())) {
// Add the cell to the cell map
tableFrame->AppendCell((nsTableCellFrame&)*childFrame, GetRowIndex());
// XXX this could be optimized with some effort
tableFrame->SetNeedStrategyInit(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
tableFrame->AppendDirtyReflowCommand(this);
return NS_OK;
}
NS_IMETHODIMP
nsTableRowFrame::InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList)
{
NS_ASSERTION(!aListName, "unexpected child list");
NS_ASSERTION(!aPrevFrame || aPrevFrame->GetParent() == this,
"inserting after sibling frame with different parent");
// Get the table frame
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
// gather the new frames (only those which are cells) into an array
nsIAtom* cellFrameType = (tableFrame->IsBorderCollapse()) ? nsLayoutAtoms::bcTableCellFrame : nsLayoutAtoms::tableCellFrame;
nsTableCellFrame* prevCellFrame = (nsTableCellFrame *)nsTableFrame::GetFrameAtOrBefore(this, aPrevFrame, cellFrameType);
nsVoidArray cellChildren;
for (nsIFrame* childFrame = aFrameList; childFrame;
childFrame = childFrame->GetNextSibling()) {
if (IS_TABLE_CELL(childFrame->GetType())) {
cellChildren.AppendElement(childFrame);
// XXX this could be optimized with some effort
tableFrame->SetNeedStrategyInit(PR_TRUE);
}
}
// insert the cells into the cell map
PRInt32 colIndex = -1;
if (prevCellFrame) {
prevCellFrame->GetColIndex(colIndex);
}
tableFrame->InsertCells(cellChildren, GetRowIndex(), colIndex);
// Insert the frames in the frame list
mFrames.InsertFrames(nsnull, aPrevFrame, aFrameList);
// Reflow the new frames. They're already marked dirty, so generate a reflow
// command that tells us to reflow our dirty child frames
tableFrame->AppendDirtyReflowCommand(this);
return NS_OK;
}
NS_IMETHODIMP
nsTableRowFrame::RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame)
{
NS_ASSERTION(!aListName, "unexpected child list");
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (tableFrame) {
if (IS_TABLE_CELL(aOldFrame->GetType())) {
nsTableCellFrame* cellFrame = (nsTableCellFrame*)aOldFrame;
PRInt32 colIndex;
cellFrame->GetColIndex(colIndex);
// remove the cell from the cell map
tableFrame->RemoveCell(cellFrame, GetRowIndex());
// XXX this could be optimized with some effort
tableFrame->SetNeedStrategyInit(PR_TRUE);
// Remove the frame and destroy it
mFrames.DestroyFrame(aOldFrame);
// XXX This could probably be optimized with much effort
tableFrame->SetNeedStrategyInit(PR_TRUE);
// Generate a reflow command so we reflow the table itself.
// Target the row so that it gets a dirty reflow before a resize reflow
// in case another cell gets added to the row during a reflow coallesce.
tableFrame->AppendDirtyReflowCommand(this);
}
else {
NS_ERROR("unexpected frame type");
return NS_ERROR_INVALID_ARG;
}
}
return NS_OK;
}
nscoord
GetHeightOfRowsSpannedBelowFirst(nsTableCellFrame& aTableCellFrame,
nsTableFrame& aTableFrame)
{
nscoord height = 0;
nscoord cellSpacingY = aTableFrame.GetCellSpacingY();
PRInt32 rowSpan = aTableFrame.GetEffectiveRowSpan(aTableCellFrame);
// add in height of rows spanned beyond the 1st one
nsIFrame* nextRow = aTableCellFrame.GetParent()->GetNextSibling();
for (PRInt32 rowX = 1; ((rowX < rowSpan) && nextRow);) {
if (nsLayoutAtoms::tableRowFrame == nextRow->GetType()) {
height += nextRow->GetSize().height;
rowX++;
}
height += cellSpacingY;
nextRow = nextRow->GetNextSibling();
}
return height;
}
nsTableCellFrame*
nsTableRowFrame::GetFirstCell()
{
nsIFrame* childFrame = mFrames.FirstChild();
while (childFrame) {
if (IS_TABLE_CELL(childFrame->GetType())) {
return (nsTableCellFrame*)childFrame;
}
childFrame = childFrame->GetNextSibling();
}
return nsnull;
}
/**
* Post-reflow hook. This is where the table row does its post-processing
*/
void
nsTableRowFrame::DidResize(const nsHTMLReflowState& aReflowState)
{
// Resize and re-align the cell frames based on our row height
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (!tableFrame)
return;
nsTableIterator iter(*this, eTableDIR);
nsIFrame* childFrame = iter.First();
nsHTMLReflowMetrics desiredSize(PR_FALSE);
desiredSize.width = mRect.width;
desiredSize.height = mRect.height;
desiredSize.mOverflowArea = nsRect(0, 0, desiredSize.width,
desiredSize.height);
while (childFrame) {
if (IS_TABLE_CELL(childFrame->GetType())) {
nsTableCellFrame* cellFrame = (nsTableCellFrame*)childFrame;
nscoord cellHeight = mRect.height + GetHeightOfRowsSpannedBelowFirst(*cellFrame, *tableFrame);
// resize the cell's height
//if (cellFrameSize.height!=cellHeight)
{
// XXX If the cell frame has a view, then we need to resize
// it as well. We would like to only do that if the cell's size
// is changing. Why is the 'if' stmt above commented out?
cellFrame->SetSize(nsSize(cellFrame->GetSize().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);
cellFrame->VerticallyAlignChild(aReflowState, mMaxCellAscent);
ConsiderChildOverflow(desiredSize.mOverflowArea, cellFrame);
}
}
// Get the next child
childFrame = iter.Next();
}
FinishAndStoreOverflow(&desiredSize);
if (HasView()) {
nsContainerFrame::SyncFrameViewAfterReflow(GetPresContext(), this, GetView(), &desiredSize.mOverflowArea, 0);
}
// Let our base class do the usual work
}
// returns max-ascent amongst all cells that have 'vertical-align: baseline'
// *including* cells with rowspans
nscoord nsTableRowFrame::GetMaxCellAscent() const
{
return mMaxCellAscent;
}
nscoord nsTableRowFrame::GetAscent()
{
if(mMaxCellAscent)
return mMaxCellAscent;
// If we don't have a baseline on any of the cells we go for the lowest
// content edge of the inner block frames.
// Every table cell has a cell frame with its border and padding. Inside
// the cell is a block frame. The cell is as high as the tallest cell in
// the parent row. As a consequence the block frame might not touch both
// the top and the bottom padding of it parent cell frame at the same time.
//
// bbbbbbbbbbbbbbbbbb cell border: b
// bppppppppppppppppb cell padding: p
// bpxxxxxxxxxxxxxxpb inner block: x
// bpx xpb
// bpx xpb
// bpx xpb
// bpxxxxxxxxxxxxxxpb base line
// bp pb
// bp pb
// bppppppppppppppppb
// bbbbbbbbbbbbbbbbbb
nsTableIterator iter(*this, eTableDIR);
nsIFrame* childFrame = iter.First();
nscoord ascent = 0;
while (childFrame) {
if (IS_TABLE_CELL(childFrame->GetType())) {
nsIFrame* firstKid = childFrame->GetFirstChild(nsnull);
ascent = PR_MAX(ascent, firstKid->GetRect().YMost());
}
// Get the next child
childFrame = iter.Next();
}
return ascent;
}
nscoord
nsTableRowFrame::GetHeight(nscoord aPctBasis) const
{
nscoord height = 0;
if ((aPctBasis > 0) && HasPctHeight()) {
height = NSToCoordRound(GetPctHeight() * (float)aPctBasis);
}
if (HasFixedHeight()) {
height = PR_MAX(height, GetFixedHeight());
}
return PR_MAX(height, GetContentHeight());
}
void
nsTableRowFrame::ResetHeight(nscoord aFixedHeight)
{
SetHasFixedHeight(PR_FALSE);
SetHasPctHeight(PR_FALSE);
SetFixedHeight(0);
SetPctHeight(0);
SetContentHeight(0);
if (aFixedHeight > 0) {
SetFixedHeight(aFixedHeight);
}
mMaxCellAscent = 0;
mMaxCellDescent = 0;
}
void
nsTableRowFrame::UpdateHeight(nscoord aHeight,
nscoord aAscent,
nscoord aDescent,
nsTableFrame* aTableFrame,
nsTableCellFrame* aCellFrame)
{
if (!aTableFrame || !aCellFrame) {
NS_ASSERTION(PR_FALSE , "invalid call");
return;
}
if (aHeight != NS_UNCONSTRAINEDSIZE) {
if (!(aCellFrame->HasVerticalAlignBaseline())) { // only the cell's height matters
if (GetHeight() < aHeight) {
PRInt32 rowSpan = aTableFrame->GetEffectiveRowSpan(*aCellFrame);
if (rowSpan == 1) {
SetContentHeight(aHeight);
}
}
}
else { // the alignment on the baseline can change the height
NS_ASSERTION((aAscent != NS_UNCONSTRAINEDSIZE) && (aDescent != NS_UNCONSTRAINEDSIZE), "invalid call");
// see if this is a long ascender
if (mMaxCellAscent < aAscent) {
mMaxCellAscent = aAscent;
}
// see if this is a long descender and without rowspan
if (mMaxCellDescent < aDescent) {
PRInt32 rowSpan = aTableFrame->GetEffectiveRowSpan(*aCellFrame);
if (rowSpan == 1) {
mMaxCellDescent = aDescent;
}
}
// keep the tallest height in sync
if (GetHeight() < mMaxCellAscent + mMaxCellDescent) {
SetContentHeight(mMaxCellAscent + mMaxCellDescent);
}
}
}
}
nscoord
nsTableRowFrame::CalcHeight(const nsHTMLReflowState& aReflowState)
{
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (!tableFrame)
return 0;
nscoord computedHeight = (NS_UNCONSTRAINEDSIZE == aReflowState.mComputedHeight)
? 0 : aReflowState.mComputedHeight;
ResetHeight(computedHeight);
const nsStylePosition* position = GetStylePosition();
if (eStyleUnit_Coord == position->mHeight.GetUnit()) {
SetFixedHeight(position->mHeight.GetCoordValue());
}
else if (eStyleUnit_Percent == position->mHeight.GetUnit()) {
SetPctHeight(position->mHeight.GetPercentValue());
}
for (nsIFrame* kidFrame = mFrames.FirstChild(); kidFrame;
kidFrame = kidFrame->GetNextSibling()) {
if (IS_TABLE_CELL(kidFrame->GetType())) {
nscoord availWidth = ((nsTableCellFrame *)kidFrame)->GetPriorAvailWidth();
nsSize desSize = ((nsTableCellFrame *)kidFrame)->GetDesiredSize();
if ((NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) && !GetPrevInFlow()) {
CalculateCellActualSize(kidFrame, desSize.width, desSize.height, availWidth);
}
// height may have changed, adjust descent to absorb any excess difference
nscoord ascent;
if (!kidFrame->GetFirstChild(nsnull)->GetFirstChild(nsnull))
ascent = desSize.height;
else
ascent = ((nsTableCellFrame *)kidFrame)->GetDesiredAscent();
nscoord descent = desSize.height - ascent;
UpdateHeight(desSize.height, ascent, descent, tableFrame, (nsTableCellFrame*)kidFrame);
}
}
return GetHeight();
}
/**
* We need a custom display item for table row backgrounds. This is only used
* when the table row is the root of a stacking context (e.g., has 'opacity').
* Table row backgrounds can extend beyond the row frame bounds, when
* the row contains row-spanning cells.
*/
class nsDisplayTableRowBackground : public nsDisplayItem {
public:
nsDisplayTableRowBackground(nsTableRowFrame* aFrame) : nsDisplayItem(aFrame) {
MOZ_COUNT_CTOR(nsDisplayTableRowBackground);
}
#ifdef NS_BUILD_REFCNT_LOGGING
virtual ~nsDisplayTableRowBackground() {
MOZ_COUNT_DTOR(nsDisplayTableRowBackground);
}
#endif
virtual nsRect GetBounds(nsDisplayListBuilder* aBuilder) {
// the overflow rect contains any row-spanning cells, so it contains
// our background. Note that this means we may not be opaque even if
// the background style is a solid color.
return NS_STATIC_CAST(nsTableRowFrame*, mFrame)->GetOverflowRect() +
aBuilder->ToReferenceFrame(mFrame);
}
virtual void Paint(nsDisplayListBuilder* aBuilder, nsIRenderingContext* aCtx,
const nsRect& aDirtyRect);
NS_DISPLAY_DECL_NAME("TableRowBackground")
};
void
nsDisplayTableRowBackground::Paint(nsDisplayListBuilder* aBuilder,
nsIRenderingContext* aCtx, const nsRect& aDirtyRect) {
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(mFrame);
nsPoint pt = aBuilder->ToReferenceFrame(mFrame);
nsIRenderingContext::AutoPushTranslation translate(aCtx, pt.x, pt.y);
TableBackgroundPainter painter(tableFrame,
TableBackgroundPainter::eOrigin_TableRow,
mFrame->GetPresContext(), *aCtx,
aDirtyRect - pt);
painter.PaintRow(NS_STATIC_CAST(nsTableRowFrame*, mFrame));
}
NS_IMETHODIMP
nsTableRowFrame::BuildDisplayList(nsDisplayListBuilder* aBuilder,
const nsRect& aDirtyRect,
const nsDisplayListSet& aLists)
{
if (!IsVisibleInSelection(aBuilder))
return NS_OK;
PRBool isRoot = aBuilder->IsAtRootOfPseudoStackingContext();
if (isRoot) {
// This background is created regardless of whether this frame is
// visible or not. Visibility decisions are delegated to the
// table background painter.
// We would use nsDisplayGeneric for this rare case except that we
// need the background to be larger than the row frame in some
// cases.
nsresult rv = aLists.BorderBackground()->AppendNewToTop(new (aBuilder)
nsDisplayTableRowBackground(this));
NS_ENSURE_SUCCESS(rv, rv);
}
return nsTableFrame::DisplayGenericTablePart(aBuilder, this, aDirtyRect, aLists, isRoot);
}
PRIntn
nsTableRowFrame::GetSkipSides() const
{
PRIntn skip = 0;
if (nsnull != GetPrevInFlow()) {
skip |= 1 << NS_SIDE_TOP;
}
if (nsnull != GetNextInFlow()) {
skip |= 1 << NS_SIDE_BOTTOM;
}
return skip;
}
// 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(nsIFrame* aCellFrame,
nscoord& aDesiredWidth,
nscoord& aDesiredHeight,
nscoord aAvailWidth)
{
nscoord specifiedHeight = 0;
// Get the height specified in the style information
const nsStylePosition* position = aCellFrame->GetStylePosition();
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (!tableFrame)
return NS_ERROR_NULL_POINTER;
PRInt32 rowSpan = tableFrame->GetEffectiveRowSpan((nsTableCellFrame&)*aCellFrame);
switch (position->mHeight.GetUnit()) {
case eStyleUnit_Coord:
specifiedHeight = position->mHeight.GetCoordValue();
if (1 == rowSpan)
SetFixedHeight(specifiedHeight);
break;
case eStyleUnit_Percent: {
if (1 == rowSpan)
SetPctHeight(position->mHeight.GetPercentValue());
// pct heights are handled when all of the cells are finished, so don't set specifiedHeight
break;
}
case eStyleUnit_Auto:
default:
break;
}
// If the specified height is greater than the desired height, then use the specified height
if (specifiedHeight > aDesiredHeight)
aDesiredHeight = specifiedHeight;
if ((0 == aDesiredWidth) && (NS_UNCONSTRAINEDSIZE != aAvailWidth)) { // special Nav4 compatibility code for the width
aDesiredWidth = aAvailWidth;
}
return NS_OK;
}
// Calculates the available width for the table cell based on the known
// column widths taking into account column spans and column spacing
static void
CalcAvailWidth(nsTableFrame& aTableFrame,
nscoord aTableComputedWidth,
float aPixelToTwips,
nsTableCellFrame& aCellFrame,
nscoord aCellSpacingX,
nscoord& aColAvailWidth,
nscoord& aCellAvailWidth)
{
aColAvailWidth = aCellAvailWidth = NS_UNCONSTRAINEDSIZE;
PRInt32 colIndex;
aCellFrame.GetColIndex(colIndex);
PRInt32 colspan = aTableFrame.GetEffectiveColSpan(aCellFrame);
nscoord cellSpacing = 0;
for (PRInt32 spanX = 0; spanX < colspan; spanX++) {
nscoord colWidth = aTableFrame.GetColumnWidth(colIndex + spanX);
if (colWidth != WIDTH_NOT_SET) {
if (NS_UNCONSTRAINEDSIZE == aColAvailWidth) {
aColAvailWidth = colWidth;
}
else {
aColAvailWidth += colWidth;
}
}
if ((spanX > 0) && (aTableFrame.GetNumCellsOriginatingInCol(colIndex + spanX) > 0)) {
cellSpacing += aCellSpacingX;
}
}
if (NS_UNCONSTRAINEDSIZE != aColAvailWidth) {
aColAvailWidth += cellSpacing;
}
aCellAvailWidth = aColAvailWidth;
// for a cell with a colspan > 1, use its fix width (if set) as the avail width
// if this is its initial reflow
if ((aCellFrame.GetStateBits() & NS_FRAME_FIRST_REFLOW)
&& (aTableFrame.GetEffectiveColSpan(aCellFrame) > 1)) {
// see if the cell has a style width specified
const nsStylePosition* cellPosition = aCellFrame.GetStylePosition();
if (eStyleUnit_Coord == cellPosition->mWidth.GetUnit()) {
// need to add padding into fixed width
nsMargin borderPadding(0,0,0,0);
if (NS_UNCONSTRAINEDSIZE != aTableComputedWidth) {
borderPadding = nsTableFrame::GetBorderPadding(nsSize(aTableComputedWidth, 0),
aPixelToTwips, &aCellFrame);
}
nscoord fixWidth = cellPosition->mWidth.GetCoordValue() + borderPadding.left + borderPadding.right;
if (NS_UNCONSTRAINEDSIZE != aColAvailWidth) {
aCellAvailWidth = PR_MIN(aColAvailWidth, fixWidth);
} else {
aCellAvailWidth = fixWidth;
}
}
}
}
nscoord
GetSpaceBetween(PRInt32 aPrevColIndex,
PRInt32 aColIndex,
PRInt32 aColSpan,
nsTableFrame& aTableFrame,
nscoord aCellSpacingX,
PRBool aIsLeftToRight,
PRBool aCheckVisibility)
{
nscoord space = 0;
PRInt32 colX;
if (aIsLeftToRight) {
for (colX = aPrevColIndex + 1; aColIndex > colX; colX++) {
PRBool isCollapsed = PR_FALSE;
if (!aCheckVisibility) {
space += aTableFrame.GetColumnWidth(colX);
}
else {
nsTableColFrame* colFrame = aTableFrame.GetColFrame(colX);
const nsStyleVisibility* colVis = colFrame->GetStyleVisibility();
PRBool collapseCol = (NS_STYLE_VISIBILITY_COLLAPSE == colVis->mVisible);
nsIFrame* cgFrame = colFrame->GetParent();
const nsStyleVisibility* groupVis = cgFrame->GetStyleVisibility();
PRBool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE ==
groupVis->mVisible);
isCollapsed = collapseCol || collapseGroup;
if (!isCollapsed)
space += aTableFrame.GetColumnWidth(colX);
}
if (!isCollapsed && (aTableFrame.GetNumCellsOriginatingInCol(colX) > 0)) {
space += aCellSpacingX;
}
}
}
else {
PRInt32 lastCol = aColIndex + aColSpan - 1;
for (colX = aPrevColIndex - 1; colX > lastCol; colX--) {
PRBool isCollapsed = PR_FALSE;
if (!aCheckVisibility) {
space += aTableFrame.GetColumnWidth(colX);
}
else {
nsTableColFrame* colFrame = aTableFrame.GetColFrame(colX);
const nsStyleVisibility* colVis = colFrame->GetStyleVisibility();
PRBool collapseCol = (NS_STYLE_VISIBILITY_COLLAPSE == colVis->mVisible);
nsIFrame* cgFrame = colFrame->GetParent();
const nsStyleVisibility* groupVis = cgFrame->GetStyleVisibility();
PRBool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE ==
groupVis->mVisible);
isCollapsed = collapseCol || collapseGroup;
if (!isCollapsed)
space += aTableFrame.GetColumnWidth(colX);
}
if (!isCollapsed && (aTableFrame.GetNumCellsOriginatingInCol(colX) > 0)) {
space += aCellSpacingX;
}
}
}
return space;
}
static nscoord
GetComputedWidth(const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame)
{
const nsHTMLReflowState* parentReflow = aReflowState.parentReflowState;
nscoord computedWidth = 0;
while (parentReflow) {
if (parentReflow->frame == &aTableFrame) {
computedWidth = parentReflow->mComputedWidth;
break;
}
parentReflow = parentReflow->parentReflowState;
}
return computedWidth;
}
// subtract the heights of aRow's prev in flows from the unpaginated height
static
nscoord CalcHeightFromUnpaginatedHeight(nsPresContext* aPresContext,
nsTableRowFrame& aRow)
{
nscoord height = 0;
nsTableRowFrame* firstInFlow = (nsTableRowFrame*)aRow.GetFirstInFlow();
if (!firstInFlow) ABORT1(0);
if (firstInFlow->HasUnpaginatedHeight()) {
height = firstInFlow->GetUnpaginatedHeight(aPresContext);
for (nsIFrame* prevInFlow = aRow.GetPrevInFlow(); prevInFlow;
prevInFlow = prevInFlow->GetPrevInFlow()) {
height -= prevInFlow->GetSize().height;
}
}
return PR_MAX(height, 0);
}
// Called for a dirty or resize reflow. Reflows all the existing table cell
// frames unless aDirtyOnly is PR_TRUE in which case only reflow the dirty frames
NS_METHOD
nsTableRowFrame::ReflowChildren(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
nsReflowStatus& aStatus,
PRBool aDirtyOnly)
{
aStatus = NS_FRAME_COMPLETE;
GET_PIXELS_TO_TWIPS(aPresContext, p2t);
PRBool borderCollapse = (((nsTableFrame*)aTableFrame.GetFirstInFlow())->IsBorderCollapse());
nsIFrame* tablePrevInFlow = aTableFrame.GetPrevInFlow();
PRBool isPaginated = aPresContext->IsPaginated();
nsresult rv = NS_OK;
nscoord cellSpacingX = aTableFrame.GetCellSpacingX();
PRInt32 cellColSpan = 1; // must be defined here so it's set properly for non-cell kids
nsTableIteration dir = (aReflowState.availableWidth == NS_UNCONSTRAINEDSIZE)
? eTableLTR : eTableDIR;
nsTableIterator iter(*this, dir);
// remember the col index of the previous cell to handle rowspans into this row
PRInt32 firstPrevColIndex = (iter.IsLeftToRight()) ? -1 : aTableFrame.GetColCount();
PRInt32 prevColIndex = firstPrevColIndex;
nscoord x = 0; // running total of children x offset
PRBool isAutoLayout = aTableFrame.IsAutoLayout();
PRBool needToNotifyTable = PR_TRUE;
nscoord paginatedHeight = 0;
// 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.
PRBool notifyStyleChange = PR_FALSE;
if (eReflowReason_Incremental == aReflowState.reason) {
nsHTMLReflowCommand* command = aReflowState.path->mReflowCommand;
if (command) {
nsReflowType type;
command->GetType(type);
if (eReflowType_StyleChanged == type) {
notifyStyleChange = PR_TRUE;
}
}
}
// Reflow each of our existing cell frames
nsIFrame* kidFrame = iter.First();
while (kidFrame) {
nsIAtom* frameType = kidFrame->GetType();
// See if we should only reflow the dirty child frames
PRBool doReflowChild = PR_TRUE;
if (aDirtyOnly && ((kidFrame->GetStateBits() & NS_FRAME_IS_DIRTY) == 0)) {
doReflowChild = PR_FALSE;
}
else if ((NS_UNCONSTRAINEDSIZE != aReflowState.availableHeight) && IS_TABLE_CELL(frameType)) {
// We don't reflow a rowspan >1 cell here with a constrained height.
// That happens in nsTableRowGroupFrame::SplitSpanningCells.
if (aTableFrame.GetEffectiveRowSpan((nsTableCellFrame&)*kidFrame) > 1) {
doReflowChild = PR_FALSE;
}
}
if (aReflowState.mFlags.mSpecialHeightReflow) {
if (!isPaginated && (IS_TABLE_CELL(frameType) &&
!((nsTableCellFrame*)kidFrame)->NeedSpecialReflow())) {
kidFrame = iter.Next();
continue;
}
}
// Reflow the child frame
if (doReflowChild) {
if (IS_TABLE_CELL(frameType)) {
nsTableCellFrame* cellFrame = (nsTableCellFrame*)kidFrame;
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
cellColSpan = aTableFrame.GetEffectiveColSpan(*cellFrame);
// If the adjacent cell is in a prior row (because of a rowspan) add in the space
if ((iter.IsLeftToRight() && (prevColIndex != (cellColIndex - 1))) ||
(!iter.IsLeftToRight() && (prevColIndex != cellColIndex + cellColSpan))) {
x += GetSpaceBetween(prevColIndex, cellColIndex, cellColSpan, aTableFrame,
cellSpacingX, iter.IsLeftToRight(), PR_FALSE);
}
// Calculate the available width for the table cell using the known column widths
nscoord availColWidth, availCellWidth;
CalcAvailWidth(aTableFrame, GetComputedWidth(aReflowState, aTableFrame), p2t,
*cellFrame, cellSpacingX, availColWidth, availCellWidth);
// remember the rightmost (ltr) or leftmost (rtl) column this cell spans into
prevColIndex = (iter.IsLeftToRight()) ? cellColIndex + (cellColSpan - 1) : cellColIndex;
// always request MEW. Since we may turn MEW on for selected cells during incremental
// reflow, we need to request MEW *now* so that those incremental reflows will be
// able to build on existing MEW data in the children.
nsHTMLReflowMetrics desiredSize(PR_TRUE);
// If the avail width is not the same as last time we reflowed the cell or
// the cell wants to be bigger than what was available last time or
// it is a style change reflow or we are printing, then we must reflow the
// cell. Otherwise we can skip the reflow.
nsSize cellDesiredSize = cellFrame->GetDesiredSize();
if ((availCellWidth != cellFrame->GetPriorAvailWidth()) ||
(cellDesiredSize.width > cellFrame->GetPriorAvailWidth()) ||
(eReflowReason_StyleChange == aReflowState.reason) ||
isPaginated ||
(cellFrame->NeedPass2Reflow() &&
NS_UNCONSTRAINEDSIZE != aReflowState.availableWidth) ||
(aReflowState.mFlags.mSpecialHeightReflow && cellFrame->NeedSpecialReflow()) ||
(!aReflowState.mFlags.mSpecialHeightReflow && cellFrame->HadSpecialReflow()) ||
HasPctHeight() ||
notifyStyleChange) {
// Reflow the cell to fit the available width, height
nsSize kidAvailSize(availColWidth, aReflowState.availableHeight);
nsReflowReason reason = eReflowReason_Resize;
PRBool cellToWatch = PR_FALSE;
// If it's a dirty frame, then check whether it's the initial reflow
if (kidFrame->GetStateBits() & NS_FRAME_FIRST_REFLOW) {
reason = eReflowReason_Initial;
cellToWatch = PR_TRUE;
}
else if (eReflowReason_StyleChange == aReflowState.reason) {
reason = eReflowReason_StyleChange;
cellToWatch = PR_TRUE;
}
else if (notifyStyleChange) {
reason = eReflowReason_StyleChange;
cellToWatch = PR_TRUE;
}
if (cellToWatch) {
cellFrame->DidSetStyleContext(); // XXX check this
if (!tablePrevInFlow && isAutoLayout) {
// request the maximum width if availWidth is constrained
// XXX we could just do this always, but blocks have some problems
if (NS_UNCONSTRAINEDSIZE != availCellWidth) {
desiredSize.mFlags |= NS_REFLOW_CALC_MAX_WIDTH;
}
}
else {
cellToWatch = PR_FALSE;
}
}
nscoord oldMaxWidth = cellFrame->GetMaximumWidth();
nscoord oldMaxElemWidth = cellFrame->GetPass1MaxElementWidth();
// Reflow the child
nsTableCellReflowState kidReflowState(aPresContext, aReflowState,
kidFrame, kidAvailSize, reason);
InitChildReflowState(*aPresContext, kidAvailSize, borderCollapse, p2t, kidReflowState);
nsReflowStatus status;
rv = ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState,
x, 0, 0, status);
if (cellToWatch) {
nscoord maxWidth = (NS_UNCONSTRAINEDSIZE == availCellWidth)
? desiredSize.width : desiredSize.mMaximumWidth;
// save the max element width and max width
if (desiredSize.mComputeMEW) {
cellFrame->SetPass1MaxElementWidth(desiredSize.width, desiredSize.mMaxElementWidth);
if (desiredSize.mMaxElementWidth > desiredSize.width) {
desiredSize.width = desiredSize.mMaxElementWidth;
}
}
cellFrame->SetMaximumWidth(maxWidth);
}
// allow the table to determine if/how the table needs to be rebalanced
if (cellToWatch && needToNotifyTable) {
needToNotifyTable = !aTableFrame.CellChangedWidth(*cellFrame, oldMaxWidth, oldMaxElemWidth);
}
// 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 {
desiredSize.width = cellDesiredSize.width;
desiredSize.height = cellDesiredSize.height;
nsRect *overflowArea =
cellFrame->GetOverflowAreaProperty();
if (overflowArea)
desiredSize.mOverflowArea = *overflowArea;
else
desiredSize.mOverflowArea.SetRect(0, 0, cellDesiredSize.width,
cellDesiredSize.height);
// if we are in a floated table, our position is not yet established, so we cannot reposition our views
// the containing glock will do this for us after positioning the table
if (!aTableFrame.GetStyleDisplay()->IsFloating()) {
// Because we may have moved the frame we need to make sure any views are
// positioned properly. We have to do this, because any one of our parent
// frames could have moved and we have no way of knowing...
nsTableFrame::RePositionViews(kidFrame);
}
}
if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
if (!GetPrevInFlow()) {
// Calculate the cell's actual 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(kidFrame, desiredSize.width,
desiredSize.height, availCellWidth);
}
// height may have changed, adjust descent to absorb any excess difference
nscoord ascent;
if (!kidFrame->GetFirstChild(nsnull)->GetFirstChild(nsnull))
ascent = desiredSize.height;
else
ascent = ((nsTableCellFrame *)kidFrame)->GetDesiredAscent();
nscoord descent = desiredSize.height - ascent;
UpdateHeight(desiredSize.height, ascent, descent, &aTableFrame, cellFrame);
}
else {
paginatedHeight = PR_MAX(paginatedHeight, desiredSize.height);
PRInt32 rowSpan = aTableFrame.GetEffectiveRowSpan((nsTableCellFrame&)*kidFrame);
if (1 == rowSpan) {
SetContentHeight(paginatedHeight);
}
}
// Place the child
if (NS_UNCONSTRAINEDSIZE != availColWidth) {
desiredSize.width = PR_MAX(availCellWidth, availColWidth);
}
FinishReflowChild(kidFrame, aPresContext, nsnull, desiredSize, x, 0, 0);
x += desiredSize.width;
}
else {// it's an unknown frame type, give it a generic reflow and ignore the results
nsTableCellReflowState kidReflowState(aPresContext, aReflowState,
kidFrame, nsSize(0,0), eReflowReason_Resize);
InitChildReflowState(*aPresContext, nsSize(0,0), PR_FALSE, p2t, kidReflowState);
nsHTMLReflowMetrics desiredSize(PR_FALSE);
nsReflowStatus status;
ReflowChild(kidFrame, aPresContext, desiredSize, kidReflowState, 0, 0, 0, status);
kidFrame->DidReflow(aPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
}
}
else if (IS_TABLE_CELL(frameType)) {
// we need to account for the cell's width even if it isn't reflowed
x += kidFrame->GetSize().width;
}
ConsiderChildOverflow(aDesiredSize.mOverflowArea, kidFrame);
kidFrame = iter.Next(); // Get the next child
x += cellSpacingX;
}
// just set our width to what was available. The table will calculate the width and not use our value.
aDesiredSize.width = aReflowState.availableWidth;
if (aReflowState.mFlags.mSpecialHeightReflow) {
aDesiredSize.height = mRect.height;
}
else if (NS_UNCONSTRAINEDSIZE == aReflowState.availableHeight) {
aDesiredSize.height = CalcHeight(aReflowState);
if (GetPrevInFlow()) {
nscoord height = CalcHeightFromUnpaginatedHeight(aPresContext, *this);
aDesiredSize.height = PR_MAX(aDesiredSize.height, height);
}
else {
if (isPaginated && HasStyleHeight()) {
// set the unpaginated height so next in flows can try to honor it
SetHasUnpaginatedHeight(PR_TRUE);
SetUnpaginatedHeight(aPresContext, aDesiredSize.height);
}
if (isPaginated && HasUnpaginatedHeight()) {
aDesiredSize.height = PR_MAX(aDesiredSize.height, GetUnpaginatedHeight(aPresContext));
}
}
}
else { // constrained height, paginated
aDesiredSize.height = paginatedHeight;
if (aDesiredSize.height <= aReflowState.availableHeight) {
nscoord height = CalcHeightFromUnpaginatedHeight(aPresContext, *this);
aDesiredSize.height = PR_MAX(aDesiredSize.height, height);
aDesiredSize.height = PR_MIN(aDesiredSize.height, aReflowState.availableHeight);
}
}
nsRect rowRect(0, 0, aDesiredSize.width, aDesiredSize.height);
aDesiredSize.mOverflowArea.UnionRect(aDesiredSize.mOverflowArea, rowRect);
FinishAndStoreOverflow(&aDesiredSize);
return rv;
}
NS_METHOD nsTableRowFrame::IncrementalReflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
nsReflowStatus& aStatus)
{
CalcHeight(aReflowState); // need to recalculate it based on last reflow sizes
// the row is a target if its path has a reflow command
nsHTMLReflowCommand* command = aReflowState.path->mReflowCommand;
if (command)
IR_TargetIsMe(aPresContext, aDesiredSize, aReflowState, aTableFrame, aStatus);
// see if the chidren are targets as well
nsReflowPath::iterator iter = aReflowState.path->FirstChild();
nsReflowPath::iterator end = aReflowState.path->EndChildren();
for (; iter != end; ++iter)
IR_TargetIsChild(aPresContext, aDesiredSize, aReflowState, aTableFrame, aStatus, *iter);
return NS_OK;
}
NS_METHOD
nsTableRowFrame::IR_TargetIsMe(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
nsReflowStatus& aStatus)
{
nsresult rv = NS_FRAME_COMPLETE;
nsReflowType type;
aReflowState.path->mReflowCommand->GetType(type);
switch (type) {
case eReflowType_ReflowDirty:
// Reflow the dirty child frames. Typically this is newly added frames.
rv = ReflowChildren(aPresContext, aDesiredSize, aReflowState, aTableFrame, aStatus, PR_TRUE);
break;
case eReflowType_StyleChanged :
rv = IR_StyleChanged(aPresContext, aDesiredSize, aReflowState, aTableFrame, aStatus);
break;
case eReflowType_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(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
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
aTableFrame.SetNeedStrategyInit(PR_TRUE);
rv = ReflowChildren(aPresContext, aDesiredSize, aReflowState, aTableFrame, aStatus, PR_FALSE);
return rv;
}
NS_METHOD
nsTableRowFrame::IR_TargetIsChild(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame& aTableFrame,
nsReflowStatus& aStatus,
nsIFrame* aNextFrame)
{
if (!aNextFrame) return NS_ERROR_NULL_POINTER;
nsresult rv = NS_OK;
GET_PIXELS_TO_TWIPS(aPresContext, p2t);
PRBool isAutoLayout = aTableFrame.IsAutoLayout();
const nsStyleDisplay* childDisplay = aNextFrame->GetStyleDisplay();
if (NS_STYLE_DISPLAY_TABLE_CELL == childDisplay->mDisplay) {
nsTableCellFrame* cellFrame = (nsTableCellFrame*)aNextFrame;
// Get the x coord of the cell
nsPoint cellOrigin = cellFrame->GetPosition();
// At this point, we know the column widths. Compute the cell available width
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
nscoord cellSpacingX = aTableFrame.GetCellSpacingX();
nscoord colAvailWidth, cellAvailWidth;
CalcAvailWidth(aTableFrame, GetComputedWidth(aReflowState, aTableFrame), p2t,
*cellFrame, cellSpacingX, colAvailWidth, cellAvailWidth);
// 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 cellAvailSize(cellAvailWidth, NS_UNCONSTRAINEDSIZE);
// Pass along the reflow command
// Unless this is a fixed-layout table, then have the cell incrementally
// update its maximum width.
nsHTMLReflowMetrics cellMet(PR_TRUE,
isAutoLayout ? NS_REFLOW_CALC_MAX_WIDTH : 0);
GET_PIXELS_TO_TWIPS(aPresContext, p2t);
nsTableCellReflowState kidRS(aPresContext, aReflowState, aNextFrame, cellAvailSize,
aReflowState.reason);
// If the table will intialize the strategy (and balance) or balance, make the computed
// width unconstrained. This avoids having the cell block compute a bogus max width
// which will bias the balancing. Leave the avail width alone, since it is a best guess.
// After the table balances, the cell will get reflowed with the correct computed width.
PRBool resetComputedWidth = aTableFrame.NeedStrategyInit() || aTableFrame.NeedStrategyBalance();
if (resetComputedWidth)
cellFrame->SetNeedPass2Reflow(PR_TRUE);
InitChildReflowState(*aPresContext, cellAvailSize, aTableFrame.IsBorderCollapse(),
p2t, kidRS, resetComputedWidth);
// Remember the current desired size, we'll need it later
nscoord oldCellMinWidth = cellFrame->GetPass1MaxElementWidth();
nscoord oldCellMaximumWidth = cellFrame->GetMaximumWidth();
nsSize oldCellDesSize = cellFrame->GetDesiredSize();
nscoord oldCellDesAscent = cellFrame->GetDesiredAscent();
nscoord oldCellDesDescent = oldCellDesSize.height - oldCellDesAscent;
// 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, cellMet, kidRS,
cellOrigin.x, 0, 0, aStatus);
nsSize initCellDesSize(cellMet.width, cellMet.height);
nscoord initCellDesAscent = cellMet.ascent;
nscoord initCellDesDescent = cellMet.descent;
// cache the max-elem and maximum widths
cellFrame->SetPass1MaxElementWidth(cellMet.width, cellMet.mMaxElementWidth);
cellFrame->SetMaximumWidth(cellMet.mMaximumWidth);
// 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(aNextFrame, cellMet.width, cellMet.height, cellAvailWidth);
// height may have changed, adjust descent to absorb any excess difference
if (!aNextFrame->GetFirstChild(nsnull)->GetFirstChild(nsnull))
cellMet.ascent = cellMet.height;
cellMet.descent = cellMet.height - cellMet.ascent;
// if the cell got shorter and it may have been the tallest, recalc the tallest cell
PRBool tallestCellGotShorter = PR_FALSE;
PRBool hasVerticalAlignBaseline = cellFrame->HasVerticalAlignBaseline();
if (!hasVerticalAlignBaseline) {
// only the height matters
tallestCellGotShorter =
TallestCellGotShorter(oldCellDesSize.height, cellMet.height, GetHeight());
}
else {
// the ascent matters
tallestCellGotShorter =
TallestCellGotShorter(oldCellDesAscent, cellMet.ascent, mMaxCellAscent);
// the descent of cells without rowspan also matters
if (!tallestCellGotShorter) {
PRInt32 rowSpan = aTableFrame.GetEffectiveRowSpan(*cellFrame);
if (rowSpan == 1) {
tallestCellGotShorter =
TallestCellGotShorter(oldCellDesDescent, cellMet.descent, mMaxCellDescent);
}
}
}
if (tallestCellGotShorter) {
CalcHeight(aReflowState);
}
else {
UpdateHeight(cellMet.height, cellMet.ascent, cellMet.descent, &aTableFrame, cellFrame);
}
// if the cell's desired size didn't changed, our height is unchanged
aDesiredSize.mNothingChanged = PR_FALSE;
PRInt32 rowSpan = aTableFrame.GetEffectiveRowSpan(*cellFrame);
if ((initCellDesSize.width == oldCellDesSize.width) &&
(initCellDesSize.height == oldCellDesSize.height) &&
(oldCellMaximumWidth == cellMet.mMaximumWidth)) {
if (!hasVerticalAlignBaseline) { // only the cell's height matters
aDesiredSize.mNothingChanged = PR_TRUE;
}
else { // cell's ascent and cell's descent matter
if (initCellDesAscent == oldCellDesAscent) {
if ((rowSpan == 1) && (initCellDesDescent == oldCellDesDescent)) {
aDesiredSize.mNothingChanged = PR_TRUE;
}
}
}
}
aDesiredSize.height = (aDesiredSize.mNothingChanged) ? mRect.height : GetHeight();
if (1 == rowSpan) {
cellMet.height = aDesiredSize.height;
}
else {
nscoord heightOfRows = aDesiredSize.height + GetHeightOfRowsSpannedBelowFirst(*cellFrame, aTableFrame);
cellMet.height = PR_MAX(cellMet.height, heightOfRows);
// XXX need to check what happens when this height differs from height of the cell's previous mRect.height
}
// Now place the child
cellMet.width = colAvailWidth;
FinishReflowChild(aNextFrame, aPresContext, nsnull, cellMet, cellOrigin.x, 0, 0);
// Notify the table if the cell width changed so it can decide whether to rebalance
if (!aDesiredSize.mNothingChanged) {
aTableFrame.CellChangedWidth(*cellFrame, oldCellMinWidth, oldCellMaximumWidth);
}
// Return our desired size. Note that our desired width is just whatever width
// we were given by the row group frame
aDesiredSize.width = aReflowState.availableWidth;
if (!aDesiredSize.mNothingChanged) {
if (aDesiredSize.height == mRect.height) { // our height didn't change
cellFrame->VerticallyAlignChild(aReflowState, mMaxCellAscent);
nsRect dirtyRect = cellFrame->GetRect();
dirtyRect.height = mRect.height;
ConsiderChildOverflow(aDesiredSize.mOverflowArea, cellFrame);
dirtyRect.UnionRect(dirtyRect, aDesiredSize.mOverflowArea);
Invalidate(dirtyRect);
}
}
else { // we dont realign vertical but we need to update the overflow area
nsIFrame* cellKidFrame = cellFrame->GetFirstChild(nsnull);
if (cellKidFrame) {
// XXX This is bogus. The code above changes the cell width
// and height but leaves the overflow area alone. How can that
// be right?
// Make sure the overflow area includes the width and height, in any case.
cellMet.mOverflowArea.UnionRect(cellMet.mOverflowArea,
nsRect(0, 0, cellMet.width, cellMet.height));
cellFrame->ConsiderChildOverflow(cellMet.mOverflowArea, cellKidFrame);
cellFrame->FinishAndStoreOverflow(&cellMet);
if (cellFrame->HasView()) {
nsContainerFrame::SyncFrameViewAfterReflow(aPresContext, cellFrame, cellFrame->GetView(), &cellMet.mOverflowArea, 0);
}
}
}
}
else
{ // pass reflow to unknown frame child
// aDesiredSize does not change
}
// recover the overflow area
aDesiredSize.mOverflowArea = nsRect(0, 0, aDesiredSize.width, aDesiredSize.height);
for (nsIFrame* cell = mFrames.FirstChild(); cell; cell = cell->GetNextSibling()) {
ConsiderChildOverflow(aDesiredSize.mOverflowArea, cell);
}
FinishAndStoreOverflow(&aDesiredSize);
// When returning whether we're complete we need to look at each of our cell
// frames. If any of them has a continuing frame, then we're not complete. We
// can't just return the status of the cell frame we just reflowed...
aStatus = NS_FRAME_COMPLETE;
if (GetNextInFlow()) {
for (nsIFrame* cell = mFrames.FirstChild(); cell;
cell = cell->GetNextSibling()) {
nsIFrame* contFrame = cell->GetNextInFlow();
if (contFrame) {
aStatus = NS_FRAME_NOT_COMPLETE;
break;
}
}
}
return rv;
}
/** Layout the entire row.
* This method stacks cells horizontally according to HTML 4.0 rules.
*/
NS_METHOD
nsTableRowFrame::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
DO_GLOBAL_REFLOW_COUNT("nsTableRowFrame", 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;
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (!tableFrame)
return NS_ERROR_NULL_POINTER;
const nsStyleVisibility* rowVis = GetStyleVisibility();
PRBool collapseRow = (NS_STYLE_VISIBILITY_COLLAPSE == rowVis->mVisible);
if (collapseRow) {
tableFrame->SetNeedToCollapse(PR_TRUE);
}
// see if a special height reflow needs to occur due to having a pct height
if (!NeedSpecialReflow())
nsTableFrame::CheckRequestSpecialHeightReflow(aReflowState);
switch (aReflowState.reason) {
case eReflowReason_Initial:
rv = ReflowChildren(aPresContext, aDesiredSize, aReflowState, *tableFrame, aStatus, PR_FALSE);
break;
case eReflowReason_Resize:
case eReflowReason_StyleChange:
case eReflowReason_Dirty:
rv = ReflowChildren(aPresContext, aDesiredSize, aReflowState, *tableFrame, aStatus, PR_FALSE);
break;
case eReflowReason_Incremental:
rv = IncrementalReflow(aPresContext, aDesiredSize, aReflowState, *tableFrame, aStatus);
break;
default:
NS_ASSERTION(PR_FALSE , "we should handle this reflow reason");
rv = NS_ERROR_NOT_IMPLEMENTED;
break;
}
// just set our width to what was available. The table will calculate the width and not use our value.
aDesiredSize.width = aReflowState.availableWidth;
if (aReflowState.mFlags.mSpecialHeightReflow) {
SetNeedSpecialReflow(PR_FALSE);
}
#if defined DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugReflow(this, (nsHTMLReflowState&)aReflowState, &aDesiredSize, aStatus);
#endif
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return rv;
}
/**
* 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
*/
nscoord
nsTableRowFrame::ReflowCellFrame(nsPresContext* aPresContext,
const nsHTMLReflowState& aReflowState,
nsTableCellFrame* aCellFrame,
nscoord aAvailableHeight,
nsReflowStatus& aStatus)
{
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (!tableFrame)
ABORT1(NS_ERROR_NULL_POINTER);
// Reflow the cell frame with the specified height. Use the existing width
nsSize cellSize = aCellFrame->GetSize();
nsSize availSize(cellSize.width, aAvailableHeight);
PRBool borderCollapse = ((nsTableFrame*)tableFrame->GetFirstInFlow())->IsBorderCollapse();
GET_PIXELS_TO_TWIPS(aPresContext, p2t);
nsTableCellReflowState cellReflowState(aPresContext, aReflowState, aCellFrame, availSize,
eReflowReason_Resize);
InitChildReflowState(*aPresContext, availSize, borderCollapse, p2t, cellReflowState);
nsHTMLReflowMetrics desiredSize(PR_FALSE);
ReflowChild(aCellFrame, aPresContext, desiredSize, cellReflowState,
0, 0, NS_FRAME_NO_MOVE_FRAME, aStatus);
PRBool fullyComplete = NS_FRAME_IS_COMPLETE(aStatus) && !NS_FRAME_IS_TRUNCATED(aStatus);
aCellFrame->SetSize(
nsSize(cellSize.width, fullyComplete ? aAvailableHeight : desiredSize.height));
// XXX What happens if this cell has 'vertical-align: baseline' ?
// XXX Why is it assumed that the cell's ascent hasn't changed ?
if (fullyComplete) {
aCellFrame->VerticallyAlignChild(aReflowState, mMaxCellAscent);
}
aCellFrame->DidReflow(aPresContext, nsnull, NS_FRAME_REFLOW_FINISHED);
return desiredSize.height;
}
nscoord
nsTableRowFrame::CollapseRowIfNecessary(nscoord aRowOffset,
nscoord aWidth,
PRBool aCollapseGroup,
PRBool& aDidCollapse)
{
const nsStyleVisibility* rowVis = GetStyleVisibility();
PRBool collapseRow = (NS_STYLE_VISIBILITY_COLLAPSE == rowVis->mVisible);
nsTableFrame* tableFrame = nsTableFrame::GetTableFrame(this);
if (!tableFrame)
return 0;
if (collapseRow) {
tableFrame->SetNeedToCollapse(PR_TRUE);
}
nsRect rowRect = GetRect();
rowRect.y -= aRowOffset;
rowRect.width = aWidth;
nsRect overflowArea(0, 0, 0, 0);
nscoord shift = 0;
nscoord cellSpacingX = tableFrame->GetCellSpacingX();
nscoord cellSpacingY = tableFrame->GetCellSpacingY();
if (aCollapseGroup || collapseRow) {
nsTableCellFrame* cellFrame = GetFirstCell();
aDidCollapse = PR_TRUE;
shift = rowRect.height + cellSpacingY;
while (cellFrame) {
nsRect cRect = cellFrame->GetRect();
cRect.height = 0;
cellFrame->SetRect(cRect);
cellFrame = cellFrame->GetNextCell();
}
rowRect.height = 0;
}
else { // row is not collapsed
nsTableIterator iter(*this, eTableDIR);
// remember the col index of the previous cell to handle rowspans into this
// row
PRInt32 firstPrevColIndex = (iter.IsLeftToRight()) ? -1 :
tableFrame->GetColCount();
PRInt32 prevColIndex = firstPrevColIndex;
nscoord x = 0; // running total of children x offset
PRInt32 colIncrement = iter.IsLeftToRight() ? 1 : -1;
//nscoord x = cellSpacingX;
nsIFrame* kidFrame = iter.First();
while (kidFrame) {
nsIAtom* frameType = kidFrame->GetType();
if (IS_TABLE_CELL(frameType)) {
nsTableCellFrame* cellFrame = (nsTableCellFrame*)kidFrame;
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
PRInt32 cellColSpan = tableFrame->GetEffectiveColSpan(*cellFrame);
// If the adjacent cell is in a prior row (because of a rowspan) add in
// the space
if ((iter.IsLeftToRight() && (prevColIndex != (cellColIndex - 1))) ||
(!iter.IsLeftToRight() &&
(prevColIndex != cellColIndex + cellColSpan))) {
x += GetSpaceBetween(prevColIndex, cellColIndex, cellColSpan,
*tableFrame, cellSpacingX, iter.IsLeftToRight(),
PR_TRUE);
}
nsRect cRect(x, 0, 0,rowRect.height);
// remember the rightmost (ltr) or leftmost (rtl) column this cell
// spans into
prevColIndex = (iter.IsLeftToRight()) ?
cellColIndex + (cellColSpan - 1) : cellColIndex;
PRInt32 startIndex = (iter.IsLeftToRight()) ?
cellColIndex : cellColIndex + (cellColSpan - 1);
PRInt32 actualColSpan = cellColSpan;
PRBool isVisible = PR_FALSE;
for (PRInt32 colX = startIndex; actualColSpan > 0;
colX += colIncrement, actualColSpan--) {
nsTableColFrame* colFrame = tableFrame->GetColFrame(colX);
const nsStyleVisibility* colVis = colFrame->GetStyleVisibility();
PRBool collapseCol = (NS_STYLE_VISIBILITY_COLLAPSE ==
colVis->mVisible);
nsIFrame* cgFrame = colFrame->GetParent();
const nsStyleVisibility* groupVis = cgFrame->GetStyleVisibility();
PRBool collapseGroup = (NS_STYLE_VISIBILITY_COLLAPSE ==
groupVis->mVisible);
PRBool isCollapsed = collapseCol || collapseGroup;
if (isCollapsed) {
tableFrame->SetNeedToCollapse(PR_TRUE);
}
else {
cRect.width += tableFrame->GetColumnWidth(colX);
isVisible = PR_TRUE;
}
if (!isCollapsed && (actualColSpan > 1)) {
nsTableColFrame* nextColFrame =
tableFrame->GetColFrame(colX + colIncrement);
const nsStyleVisibility* nextColVis =
nextColFrame->GetStyleVisibility();
if ( (NS_STYLE_VISIBILITY_COLLAPSE != nextColVis->mVisible) &&
(tableFrame->GetNumCellsOriginatingInCol(colX + colIncrement) > 0)) {
cRect.width += cellSpacingX;
}
}
}
x += cRect.width;
if (isVisible)
x += cellSpacingX;
PRInt32 actualRowSpan = tableFrame->GetEffectiveRowSpan(*cellFrame);
nsTableRowFrame* rowFrame = GetNextRow();
for (actualRowSpan--; actualRowSpan > 0 && rowFrame; actualRowSpan--) {
const nsStyleVisibility* nextRowVis = rowFrame->GetStyleVisibility();
PRBool collapseNextRow = (NS_STYLE_VISIBILITY_COLLAPSE ==
nextRowVis->mVisible);
if (!collapseNextRow) {
nsRect nextRect = rowFrame->GetRect();
cRect.height += nextRect.height + cellSpacingY;
}
rowFrame = rowFrame->GetNextRow();
}
cellFrame->SetRect(cRect);
nsRect cellOverflow = nsRect(0, 0, cRect.width, cRect.height);
cellFrame->FinishAndStoreOverflow(&cellOverflow, nsSize(cRect.width,
cRect.height));
nsTableFrame::RePositionViews(cellFrame);
ConsiderChildOverflow(overflowArea, cellFrame);
}
kidFrame = iter.Next(); // Get the next child
}
}
SetRect(rowRect);
overflowArea.UnionRect(nsRect(0,0,rowRect.width, rowRect.height),
overflowArea);
FinishAndStoreOverflow(&overflowArea, nsSize(rowRect.width,
rowRect.height));
nsTableFrame::RePositionViews(this);
return shift;
}
/**
* These 3 functions are 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);
aFrame->SetParent(this);
}
void
nsTableRowFrame::InsertCellFrame(nsTableCellFrame* aFrame,
PRInt32 aColIndex)
{
// Find the cell frame where col index < aColIndex
nsTableCellFrame* priorCell = nsnull;
for (nsIFrame* child = mFrames.FirstChild(); child;
child = child->GetNextSibling()) {
if (!IS_TABLE_CELL(child->GetType())) {
nsTableCellFrame* cellFrame = (nsTableCellFrame*)child;
PRInt32 colIndex;
cellFrame->GetColIndex(colIndex);
if (colIndex < aColIndex) {
priorCell = cellFrame;
}
else break;
}
}
InsertCellFrame(aFrame, priorCell);
}
void
nsTableRowFrame::RemoveCellFrame(nsTableCellFrame* aFrame)
{
if (!mFrames.RemoveFrame(aFrame))
NS_ASSERTION(PR_FALSE, "frame not in list");
}
nsIAtom*
nsTableRowFrame::GetType() const
{
return nsLayoutAtoms::tableRowFrame;
}
nsTableRowFrame*
nsTableRowFrame::GetNextRow() const
{
nsIFrame* childFrame = GetNextSibling();
while (childFrame) {
if (nsLayoutAtoms::tableRowFrame == childFrame->GetType()) {
NS_ASSERTION(NS_STYLE_DISPLAY_TABLE_ROW == childFrame->GetStyleDisplay()->mDisplay, "wrong display type on rowframe");
return (nsTableRowFrame*)childFrame;
}
childFrame = childFrame->GetNextSibling();
}
return nsnull;
}
void
nsTableRowFrame::SetUnpaginatedHeight(nsPresContext* aPresContext,
nscoord aValue)
{
NS_ASSERTION(!GetPrevInFlow(), "program error");
// Get the property
nscoord* value = (nscoord*)nsTableFrame::GetProperty(this, nsLayoutAtoms::rowUnpaginatedHeightProperty, PR_TRUE);
if (value) {
*value = aValue;
}
}
nscoord
nsTableRowFrame::GetUnpaginatedHeight(nsPresContext* aPresContext)
{
// See if the property is set
nscoord* value = (nscoord*)nsTableFrame::GetProperty(GetFirstInFlow(), nsLayoutAtoms::rowUnpaginatedHeightProperty);
if (value)
return *value;
else
return 0;
}
void nsTableRowFrame::SetContinuousBCBorderWidth(PRUint8 aForSide,
BCPixelSize aPixelValue)
{
switch (aForSide) {
case NS_SIDE_RIGHT:
mRightContBorderWidth = aPixelValue;
return;
case NS_SIDE_TOP:
mTopContBorderWidth = aPixelValue;
return;
case NS_SIDE_LEFT:
mLeftContBorderWidth = aPixelValue;
return;
default:
NS_ERROR("invalid NS_SIDE arg");
}
}
/* ----- global methods ----- */
nsIFrame*
NS_NewTableRowFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsTableRowFrame(aContext);
}
#ifdef DEBUG
NS_IMETHODIMP
nsTableRowFrame::GetFrameName(nsAString& aResult) const
{
return MakeFrameName(NS_LITERAL_STRING("TableRow"), aResult);
}
#endif
Ссылка в новой задаче Показать git blame Копировать постоянную ссылку