RetroZilla/layout/tables/BasicTableLayoutStrategy.cpp
2015-10-20 23:03:22 -04:00

1971 lines
77 KiB
C++

/* -*- 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
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* decision by deleting the provisions above and replace them with the notice
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* the provisions above, a recipient may use your version of this file under
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* ***** END LICENSE BLOCK ***** */
#define PL_ARENA_CONST_ALIGN_MASK (sizeof(void*)-1)
#include "plarena.h"
#include "BasicTableLayoutStrategy.h"
#include "nsPresContext.h"
#include "nsTableFrame.h"
#include "nsTableColFrame.h"
#include "nsTableCellFrame.h"
#include "nsStyleConsts.h"
#include "nsVoidArray.h"
#include "nsQuickSort.h"
#define ARENA_ALLOCATE(var, pool, num, type) \
{void *_tmp_; PL_ARENA_ALLOCATE(_tmp_, pool, (num*sizeof(type))); \
var = NS_REINTERPRET_CAST(type*, _tmp_); }
// Local class used to hold information about table cells so we do not
// have to look it up multiple times
struct CellInfo {
nsTableCellFrame *cellFrame;
PRInt32 colSpan;
};
#ifdef DEBUG_TABLE_STRATEGY
static PRInt32 gsDebugCount = 0;
#endif
// The priority of allocations for columns is as follows
// 1) max(MIN, MIN_ADJ)
// 2) max (PCT, PCT_ADJ)
// 3) FIX
// 4) FIX_ADJ
// 5) max(DES_CON, DES_ADJ), but use MIN_PRO if present
// 6) for a fixed width table, the column may get more
// space if the sum of the col allocations is insufficient
// the logic here is kept in synch with that in CalculateTotals.
PRBool CanAllocate(PRInt32 aType,
PRInt32 aPrevType,
nsTableColFrame* aColFrame)
{
switch(aType) {
case PCT:
case FIX:
case DES_CON:
return (WIDTH_NOT_SET == aPrevType);
case FIX_ADJ:
return (WIDTH_NOT_SET == aPrevType) || (FIX == aPrevType);
default:
NS_ASSERTION(PR_FALSE, "invalid call");
}
return PR_FALSE;
}
// this doesn't work for a col frame which might get its width from a col
PRBool
HasPctValue(const nsIFrame* aFrame)
{
const nsStylePosition* position = aFrame->GetStylePosition();
if (eStyleUnit_Percent == position->mWidth.GetUnit()) {
float percent = position->mWidth.GetPercentValue();
if (percent > 0.0f) {
return PR_TRUE;
}
}
return PR_FALSE;
}
/* ---------- BasicTableLayoutStrategy ---------- */
MOZ_DECL_CTOR_COUNTER(BasicTableLayoutStrategy)
BasicTableLayoutStrategy::BasicTableLayoutStrategy(nsTableFrame *aFrame, PRBool aIsNavQuirks)
{
MOZ_COUNT_CTOR(BasicTableLayoutStrategy);
NS_ASSERTION(nsnull != aFrame, "bad frame arg");
mTableFrame = aFrame;
mCellSpacingTotal = 0;
mIsNavQuirksMode = aIsNavQuirks;
}
BasicTableLayoutStrategy::~BasicTableLayoutStrategy()
{
MOZ_COUNT_DTOR(BasicTableLayoutStrategy);
}
PRBool BasicTableLayoutStrategy::Initialize(const nsHTMLReflowState& aReflowState)
{
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eInit, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_TRUE);
#endif
ContinuingFrameCheck();
PRBool result = PR_TRUE;
// re-init instance variables
mCellSpacingTotal = 0;
mCols = mTableFrame->GetEffectiveCOLSAttribute();
mTableFrame->SetHasPctCol(PR_FALSE);
nscoord boxWidth = mTableFrame->CalcBorderBoxWidth(aReflowState);
PRBool hasPctCol = AssignNonPctColumnWidths(boxWidth, aReflowState);
mTableFrame->SetHasPctCol(hasPctCol);
// calc the min, desired, preferred widths from what we know so far
nscoord minWidth, prefWidth;
mTableFrame->CalcMinAndPreferredWidths(aReflowState, PR_FALSE, minWidth, prefWidth);
if (hasPctCol && mTableFrame->IsAutoWidth()) {
prefWidth = CalcPctAdjTableWidth(aReflowState, boxWidth);
}
// calc the desired width, considering if there is a specified width.
// don't use nsTableFrame::CalcDesiredWidth because it is based on table column widths.
nscoord desWidth = (mTableFrame->IsAutoWidth()) ? PR_MIN(prefWidth, aReflowState.availableWidth)
: prefWidth;
desWidth = PR_MAX(desWidth, minWidth);
mTableFrame->SetMinWidth(minWidth);
mTableFrame->SetDesiredWidth(desWidth);
mTableFrame->SetPreferredWidth(prefWidth);
mTableFrame->SetNeedStrategyInit(PR_FALSE);
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eInit, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_FALSE);
#endif
return result;
}
void BasicTableLayoutStrategy::ContinuingFrameCheck()
{
NS_ASSERTION(!mTableFrame->GetPrevInFlow(),
"never ever call me on a continuing frame!");
}
PRBool BCW_Wrapup(const nsHTMLReflowState& aReflowState,
BasicTableLayoutStrategy* aStrategy,
nsTableFrame* aTableFrame,
PRInt32* aAllocTypes)
{
if (aAllocTypes)
delete [] aAllocTypes;
#ifdef DEBUG_TABLE_STRATEGY
printf("BalanceColumnWidths ex \n"); aTableFrame->Dump(PR_FALSE, PR_TRUE, PR_FALSE);
#endif
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eBalanceCols, *aTableFrame, (nsHTMLReflowState&)aReflowState, PR_FALSE);
#endif
return PR_TRUE;
}
void
ResetPctValues(nsTableFrame* aTableFrame,
PRInt32 aNumCols)
{
// initialize the col percent and cell percent values to 0.
PRInt32 colX;
for (colX = 0; colX < aNumCols; colX++) {
nsTableColFrame* colFrame = aTableFrame->GetColFrame(colX);
if (colFrame) {
colFrame->SetWidth(PCT, WIDTH_NOT_SET);
colFrame->SetWidth(PCT_ADJ, WIDTH_NOT_SET);
}
}
}
PRBool
BasicTableLayoutStrategy::BalanceColumnWidths(const nsHTMLReflowState& aReflowState)
{
#ifdef DEBUG_TABLE_STRATEGY
printf("BalanceColumnWidths en count=%d \n", gsDebugCount++); mTableFrame->Dump(PR_FALSE, PR_TRUE, PR_FALSE);
#endif
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eBalanceCols, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_TRUE);
#endif
float p2t = mTableFrame->GetPresContext()->ScaledPixelsToTwips();
ContinuingFrameCheck();
PRInt32 numCols = mTableFrame->GetColCount();
PRBool tableIsAutoWidth = mTableFrame->IsAutoWidth();
nscoord horOffset;
// get the reduction in available horizontal space due to borders and padding
nsMargin offset = mTableFrame->GetChildAreaOffset(&aReflowState);
horOffset = offset.left + offset.right;
// determine if the table is auto/fixed and get the fixed width if available
nscoord maxWidth = mTableFrame->CalcBorderBoxWidth(aReflowState);
if (NS_UNCONSTRAINEDSIZE == maxWidth) {
maxWidth = PR_MIN(maxWidth, aReflowState.availableWidth);
if (NS_UNCONSTRAINEDSIZE == maxWidth) {
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != maxWidth, "cannot balance with an unconstrained width");
return PR_FALSE;
}
}
// initialize the col percent and cell percent values to 0.
ResetPctValues(mTableFrame, numCols);
// An auto table returns a new table width based on percent cells/cols if they exist
nscoord perAdjTableWidth = 0;
if (mTableFrame->HasPctCol()) {
perAdjTableWidth = AssignPctColumnWidths(aReflowState, maxWidth, tableIsAutoWidth, p2t);
if (perAdjTableWidth > 0) {
// if an auto table has a pct col or cell, set the preferred table width
// here so that CalcPctAdjTableWidth wont't need to be called by the table
mTableFrame->SetPreferredWidth(perAdjTableWidth);
}
perAdjTableWidth = PR_MIN(perAdjTableWidth, maxWidth);
perAdjTableWidth -= horOffset;
perAdjTableWidth = PR_MAX(perAdjTableWidth, 0);
}
// reduce the maxWidth by border and padding, since we will be dealing with content width
maxWidth -= horOffset;
maxWidth = PR_MAX(0, maxWidth);
// we will re-calc mCellSpacingTotal in case longer rows were added after Initialize was called
mCellSpacingTotal = 0;
nscoord spacingX = mTableFrame->GetCellSpacingX();
PRInt32 numNonZeroWidthCols = 0;
// set the table's columns to the min width
nscoord minTableWidth = 0;
PRInt32 colX;
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord colMinWidth = colFrame->GetMinWidth();
mTableFrame->SetColumnWidth(colX, colMinWidth);
minTableWidth += colMinWidth;
if ((colFrame->GetMinWidth() > 0) || (colFrame->GetDesWidth() > 0) ||
(colFrame->GetFixWidth() > 0) || (colFrame->GetPctWidth() > 0) ||
(colFrame->GetWidth(MIN_PRO) > 0)) {
numNonZeroWidthCols++;
}
if (mTableFrame->GetNumCellsOriginatingInCol(colX) > 0) {
mCellSpacingTotal += spacingX;
}
}
if (mCellSpacingTotal > 0) {
mCellSpacingTotal += spacingX; // add last cell spacing on right
}
minTableWidth += mCellSpacingTotal;
// if the max width available is less than the min content width for fixed table, we're done
if (!tableIsAutoWidth && (maxWidth < minTableWidth)) {
return BCW_Wrapup(aReflowState, this, mTableFrame, nsnull);
}
// if the max width available is less than the min content width for auto table
// that had no % cells/cols, we're done
if (tableIsAutoWidth && (maxWidth < minTableWidth) && (0 == perAdjTableWidth)) {
return BCW_Wrapup(aReflowState, this, mTableFrame, nsnull);
}
// the following are of size NUM_WIDTHS, but only MIN_CON, DES_CON, FIX, FIX_ADJ, PCT
// are used and they account for colspan ADJusted values
PRInt32 totalWidths[NUM_WIDTHS]; // sum of col widths of a particular type
PRInt32 totalCounts[NUM_WIDTHS]; // num of cols of a particular type
PRInt32 dupedWidths[NUM_WIDTHS];
PRInt32 num0Proportional;
CalculateTotals(totalCounts, totalWidths, dupedWidths, num0Proportional);
// auto width table's adjusted width needs cell spacing
if (tableIsAutoWidth && perAdjTableWidth > 0) {
maxWidth = perAdjTableWidth;
}
nscoord totalAllocated = totalWidths[MIN_CON] + mCellSpacingTotal;
// allocate and initialize arrays indicating what col gets set
PRInt32* allocTypes = new PRInt32[numCols];
if (!allocTypes) return PR_FALSE;
for (colX = 0; colX < numCols; colX++) {
allocTypes[colX] = -1;
}
// allocate PCT/PCT_ADJ cols
if (totalCounts[PCT] > 0) {
if (totalAllocated + totalWidths[PCT] - dupedWidths[PCT] <= maxWidth) {
AllocateFully(totalAllocated, allocTypes, PCT);
//NS_WARN_IF_FALSE(totalAllocated <= maxWidth, "over allocated");
}
else {
AllocateConstrained(maxWidth - totalAllocated, PCT, PR_FALSE, allocTypes, p2t);
return BCW_Wrapup(aReflowState, this, mTableFrame, allocTypes);
}
}
// allocate FIX cols
if ((totalAllocated < maxWidth) && (totalCounts[FIX] > 0)) {
if (totalAllocated + totalWidths[FIX] - dupedWidths[FIX] <= maxWidth) {
AllocateFully(totalAllocated, allocTypes, FIX);
//NS_WARN_IF_FALSE(totalAllocated <= maxWidth, "over allocated");
}
else {
AllocateConstrained(maxWidth - totalAllocated, FIX, PR_TRUE, allocTypes, p2t);
return BCW_Wrapup(aReflowState, this, mTableFrame, allocTypes);
}
}
// allocate fixed adjusted cols
if ((totalAllocated < maxWidth) && (totalCounts[FIX_ADJ] > 0)) {
if (totalAllocated + totalWidths[FIX_ADJ] - dupedWidths[FIX_ADJ] <= maxWidth) {
AllocateFully(totalAllocated, allocTypes, FIX_ADJ);
//NS_WARN_IF_FALSE(totalAllocated <= maxWidth, "over allocated");
}
else {
AllocateConstrained(maxWidth - totalAllocated, FIX_ADJ, PR_TRUE, allocTypes, p2t);
return BCW_Wrapup(aReflowState, this, mTableFrame, allocTypes);
}
}
// allocate proportional and auto cols together
if ((totalAllocated < maxWidth) && (totalCounts[MIN_PRO] + totalCounts[DES_CON] > 0)) {
if (totalAllocated + totalWidths[MIN_PRO] - dupedWidths[MIN_PRO] +
totalWidths[DES_CON] - dupedWidths[DES_CON] <= maxWidth) {
AllocateFully(totalAllocated, allocTypes, DES_CON);
//NS_WARN_IF_FALSE(totalAllocated <= maxWidth, "over allocated");
}
else {
AllocateConstrained(maxWidth - totalAllocated, DES_CON, PR_TRUE, allocTypes, p2t);
return BCW_Wrapup(aReflowState, this, mTableFrame, allocTypes);
}
}
// if this is a nested non auto table and pass1 reflow, we are done
if ((maxWidth == NS_UNCONSTRAINEDSIZE) && (!tableIsAutoWidth)) {
return BCW_Wrapup(aReflowState, this, mTableFrame, allocTypes);
}
// allocate the rest to auto columns, with some exceptions
if ( (tableIsAutoWidth && (perAdjTableWidth - totalAllocated > 0)) ||
(!tableIsAutoWidth && (totalAllocated < maxWidth)) ) {
// determine how many cols have width either because of a min, fixed, des, or pct value
PRBool excludePct = (totalCounts[PCT] != numNonZeroWidthCols);
PRBool excludeFix = (totalCounts[PCT] + totalCounts[FIX] + totalCounts[FIX_ADJ] < numNonZeroWidthCols);
PRBool excludePro = (totalCounts[DES_CON] > 0);
PRBool exclude0Pro = (totalCounts[MIN_PRO] != num0Proportional);
if (tableIsAutoWidth) {
AllocateUnconstrained(perAdjTableWidth - totalAllocated, allocTypes, excludePct,
excludeFix, excludePro, exclude0Pro, p2t);
}
else {
AllocateUnconstrained(maxWidth - totalAllocated, allocTypes, excludePct,
excludeFix, excludePro, exclude0Pro, p2t);
}
}
return BCW_Wrapup(aReflowState, this, mTableFrame, allocTypes);
}
nscoord GetColWidth(nsTableColFrame* aColFrame,
PRInt32 aWidthType)
{
switch(aWidthType) {
case DES_CON:
return aColFrame->GetDesWidth();
case FIX:
case FIX_ADJ:
return aColFrame->GetWidth(aWidthType);
case PCT:
return aColFrame->GetPctWidth();
default:
NS_ASSERTION(PR_FALSE, "invalid call");
return WIDTH_NOT_SET;
}
}
// Allocate aWidthType values to all cols available in aAllocTypes
void BasicTableLayoutStrategy::AllocateFully(nscoord& aTotalAllocated,
PRInt32* aAllocTypes,
PRInt32 aWidthType)
{
PRInt32 numCols = mTableFrame->GetColCount();
for (PRInt32 colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
if (!CanAllocate(aWidthType, aAllocTypes[colX], colFrame)) {
continue;
}
nscoord oldWidth = mTableFrame->GetColumnWidth(colX);
nscoord newWidth = GetColWidth(colFrame, aWidthType);
// proportional and desired widths are handled together
PRBool haveProWidth = PR_FALSE;
if (DES_CON == aWidthType) {
nscoord proWidth = colFrame->GetWidth(MIN_PRO);
if (proWidth >= 0) {
haveProWidth = PR_TRUE;
newWidth = proWidth;
}
}
if (WIDTH_NOT_SET == newWidth) continue;
if (newWidth > oldWidth) {
mTableFrame->SetColumnWidth(colX, newWidth);
aTotalAllocated += newWidth - oldWidth;
}
aAllocTypes[colX] = (haveProWidth) ? MIN_PRO : aWidthType;
}
}
// This method is the last allocation method to get called, but just in case
// code gets added later after, set the allocated cols to some final value.
#define FINISHED 99
void BasicTableLayoutStrategy::AllocateUnconstrained(PRInt32 aAllocAmount,
PRInt32* aAllocTypes,
PRBool aExcludePct,
PRBool aExcludeFix,
PRBool aExcludePro,
PRBool aExclude0Pro,
float aPixelToTwips)
{
// set up allocTypes to exclude anything but auto cols if possible
PRInt32 colX;
PRInt32 numCols = mTableFrame->GetColCount();
for (colX = 0; colX < numCols; colX++) {
if (aExcludePct && (PCT == aAllocTypes[colX])) {
aAllocTypes[colX] = FINISHED;
}
else if (aExcludeFix && ((FIX == aAllocTypes[colX]) || (FIX_ADJ == aAllocTypes[colX]))) {
aAllocTypes[colX] = FINISHED;
}
else if (MIN_PRO == aAllocTypes[colX]) {
if (aExcludePro) {
aAllocTypes[colX] = FINISHED;
}
else {
if (aExclude0Pro) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
if (colFrame->GetConstraint() == e0ProportionConstraint) {
aAllocTypes[colX] = FINISHED;
}
}
}
}
}
nscoord divisor = 0;
PRInt32 numColsAllocated = 0;
PRInt32 totalAllocated = 0;
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
PRBool skipColumn = aExclude0Pro && (e0ProportionConstraint == colFrame->GetConstraint());
if (FINISHED != aAllocTypes[colX] && !skipColumn ) {
divisor += mTableFrame->GetColumnWidth(colX);
numColsAllocated++;
}
}
if (!numColsAllocated) {
// redistribute the space to all columns and prevent a division by zero
numColsAllocated = numCols;
}
for (colX = 0; colX < numCols; colX++) {
if (FINISHED != aAllocTypes[colX]) {
if (aExclude0Pro) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
if (e0ProportionConstraint == colFrame->GetConstraint()) {
continue;
}
}
nscoord oldWidth = mTableFrame->GetColumnWidth(colX);
float percent = (divisor == 0)
? (1.0f / ((float)numColsAllocated))
: ((float)oldWidth) / ((float)divisor);
nscoord addition = nsTableFrame::RoundToPixel(NSToCoordRound(((float)aAllocAmount) * percent), aPixelToTwips);
if (addition > (aAllocAmount - totalAllocated)) {
addition = nsTableFrame::RoundToPixel(aAllocAmount - totalAllocated, aPixelToTwips);
mTableFrame->SetColumnWidth(colX, oldWidth + addition);
break;
}
mTableFrame->SetColumnWidth(colX, oldWidth + addition);
totalAllocated += addition;
}
}
}
nscoord GetConstrainedWidth(nsTableColFrame* colFrame,
PRBool aConsiderPct)
{
nscoord conWidth = WIDTH_NOT_SET;
if (aConsiderPct) {
conWidth = colFrame->GetPctWidth();
}
if (conWidth <= 0 ) {
conWidth = colFrame->GetFixWidth();
}
return conWidth;
}
#define LIMIT_PCT 0 // retrict allocations to only the pct width cols
#define LIMIT_FIX 1 // retrict allocations to only the fix width cols
#define LIMIT_DES 2 // retrict allocations to only the auto width cols
#define LIMIT_NONE 3 // retrict allocations to only the auto widths unless there are none
// and then restrict fix or pct.
static int RowSortCB(const void *a, const void *b, void *)
{
const CellInfo *aa = NS_STATIC_CAST(const CellInfo*,a);
const CellInfo *bb = NS_STATIC_CAST(const CellInfo*,b);
return aa->colSpan - bb->colSpan;
}
/**
* This function finds all the rows which have a colspan greater than 1,
* and places those rows into the cellInfo array. This array is then
* sorted so that the rows with the largest colspan are last.
* @param TableFrame - The table we are working on
* @param colX - The column in the table we are considering
* @param numRows - The number of rows in the table
* @param cellInfo - The array to store the result in.
* @return - The number of entries stored in the array
*/
static PRInt32
GetSortedFrames(nsTableFrame *TableFrame,
PRInt32 colX,
PRInt32 numRows,
CellInfo *cellInfo)
{
PRInt32 rowX, index = 0;
for (rowX = 0; rowX < numRows; rowX++) {
CellInfo *inf = &cellInfo[index];
PRBool orig;
inf->cellFrame =
TableFrame->GetCellInfoAt(rowX, colX, &orig, &inf->colSpan);
// If the cell is good we keep it.
if(inf->cellFrame && orig && 1 != inf->colSpan) {
index++;
}
}
if(index>1) {
NS_QuickSort(cellInfo, index, sizeof(cellInfo[0]), RowSortCB, 0);
}
return index;
}
void
BasicTableLayoutStrategy::ComputeNonPctColspanWidths(const nsHTMLReflowState& aReflowState,
PRBool aConsiderPct,
float aPixelToTwips,
PRBool* aHasPctCol)
{
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eNonPctColspans, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_TRUE);
#endif
PRInt32 numCols = mTableFrame->GetColCount();
PRInt32 numEffCols = mTableFrame->GetEffectiveColCount();
// zero out prior ADJ values
PRInt32 colX;
for (colX = numCols - 1; colX >= 0; colX--) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
colFrame->SetWidth(MIN_ADJ, WIDTH_NOT_SET);
colFrame->SetWidth(FIX_ADJ, WIDTH_NOT_SET);
colFrame->SetWidth(DES_ADJ, WIDTH_NOT_SET);
}
// For each col, consider the cells originating in it with colspans > 1.
// Adjust the cols that each cell spans if necessary. Iterate backwards
// so that nested and/or overlaping col spans handle the inner ones first,
// ensuring more accurated calculations.
// if more than one colspan originate in one column, resort the access to
// the rows so that the inner colspans are handled first
PRInt32 numRows = mTableFrame->GetRowCount();
CellInfo* cellInfo = new CellInfo[numRows];
if(!cellInfo) {
return;
}
for (colX = numEffCols - 1; colX >= 0; colX--) { // loop only over effective columns
PRInt32 spannedRows = GetSortedFrames(mTableFrame, colX, numRows, cellInfo);
for (PRInt32 i = 0; i < spannedRows; i++) {
const CellInfo *inf = &cellInfo[i];
const nsTableCellFrame* cellFrame = inf->cellFrame;
const PRInt32 colSpan = PR_MIN(inf->colSpan, numEffCols - colX);
// set MIN_ADJ, DES_ADJ, FIX_ADJ
for (PRInt32 widthX = 0; widthX < NUM_MAJOR_WIDTHS; widthX++) {
nscoord cellWidth = 0;
if (MIN_CON == widthX) {
cellWidth = cellFrame->GetPass1MaxElementWidth();
}
else if (DES_CON == widthX) {
cellWidth = cellFrame->GetMaximumWidth();
}
else { // FIX width
// see if the cell has a style width specified
const nsStylePosition* cellPosition = cellFrame->GetStylePosition();
if (eStyleUnit_Coord == cellPosition->mWidth.GetUnit()) {
// need to add borde and padding into fixed width
nsMargin borderPadding = nsTableFrame::GetBorderPadding(nsSize(aReflowState.mComputedWidth, 0),
aPixelToTwips, cellFrame);
cellWidth = cellPosition->mWidth.GetCoordValue() + borderPadding.left + borderPadding.right;
cellWidth = PR_MAX(cellWidth, cellFrame->GetPass1MaxElementWidth());
}
}
if (0 >= cellWidth) continue;
// first allocate pct cells up to their value if aConsiderPct, then
// allocate fixed cells up to their value, then allocate auto cells
// up to their value, then allocate auto cells proportionally.
PRInt32 limit = (aConsiderPct) ? LIMIT_PCT : LIMIT_FIX;
if (MIN_CON != widthX) { // FIX and DES only need to allocate NONE
limit = LIMIT_NONE;
}
while (limit <= LIMIT_NONE) {
if (ComputeNonPctColspanWidths(widthX, cellFrame, cellWidth, colX, colSpan,
limit, aPixelToTwips)) {
break;
}
limit++;
}
}
// determine if there is a pct col if we are requested to do so
if (aHasPctCol && !*aHasPctCol) {
*aHasPctCol = HasPctValue(cellFrame);
}
}
}
delete [] cellInfo;
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eNonPctColspans, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_FALSE);
#endif
}
#ifdef DEBUG
static char* widths[] = {"MIN", "DES", "FIX"};
static char* limits[] = {"PCT", "FIX", "DES", "NONE"};
static PRInt32 dumpCount = 0;
void DumpColWidths(nsTableFrame& aTableFrame,
char* aMessage,
const nsTableCellFrame* aCellFrame,
PRInt32 aColIndex,
PRInt32 aWidthType,
PRInt32 aLimitType)
{
PRInt32 rowIndex;
aCellFrame->GetRowIndex(rowIndex);
printf ("%s (row,col)=(%d,%d) width=%s limit=%s count=%d\n", aMessage, rowIndex, aColIndex,
widths[aWidthType], limits[aLimitType], dumpCount++);
for (PRInt32 i = 0; i < aTableFrame.GetColCount(); i++) {
printf(" col %d = ", i);
nsTableColFrame* colFrame = aTableFrame.GetColFrame(i);
for (PRInt32 j = 0; j < NUM_WIDTHS; j++) {
printf("%d ", colFrame->GetWidth(j));
}
printf("\n");
}
}
#endif
// (aWidthIndex == MIN_CON) is called with:
// (aLimitType == LIMIT_PCT) to give MIN_ADJ to PCT cols (up to their PCT value)
// (aLimitType == LIMIT_FIX) to give MIN_ADJ to FIX cols (up to their FIX value)
// (aLimitType == LIMIT_DES) to give MIN_ADJ to auto cols (up to their preferred value)
// (aLimitType == LIMIT_NONE) to give MIN_ADJ to auto cols
// (aWidthIndex == FIX), (aWidthIndex == DES) is called with:
// (aLimitType == LIMIT_NONE) to give FIX_ADJ to auto cols
PRBool
BasicTableLayoutStrategy::ComputeNonPctColspanWidths(PRInt32 aWidthIndex,
const nsTableCellFrame* aCellFrame,
nscoord aCellWidth,
PRInt32 aColIndex,
PRInt32 aColSpan,
PRInt32& aLimitType,
float aPixelToTwips)
{
#ifdef DEBUG_TABLE_STRATEGY
DumpColWidths(*mTableFrame, "enter ComputeNonPctColspanWidths", aCellFrame, aColIndex, aWidthIndex, aLimitType);
#endif
PRBool result = PR_TRUE;
nscoord spanCellSpacing = 0; // total cell spacing cells being spanned
nscoord minTotal = 0; // the sum of min widths of spanned cells.
nscoord autoMinTotal = 0; // the sum of min widths of spanned auto cells.
nscoord fixMinTotal = 0; // the sum of min widths of spanned fix cells.
nscoord pctMinTotal = 0; // the sum of min widths of spanned pct cells.
nscoord pctTotal = 0; // the sum of pct widths of spanned cells.
nscoord fixTotal = 0; // the sum of fix widths of spanned cells
nscoord autoDesTotal = 0; // the sum of desired widths of spanned cells which are auto
nscoord pctLimitTotal = 0; // the sum of pct widths not exceeding aCellWidth
nscoord fixLimitTotal = 0; // the sum of fix widths not exceeding aCellWidth
nscoord desLimitTotal = 0; // the sum of des widths not exceeding aCellWidth
PRInt32 numAutoCols = 0;
nscoord spacingX = mTableFrame->GetCellSpacingX();
PRInt32 spanX;
// accumulate the various divisors to be used later
for (spanX = 0; spanX < aColSpan; spanX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(aColIndex + spanX);
if (!colFrame) continue;
nscoord minWidth = PR_MAX(colFrame->GetMinWidth(), 0);
nscoord pctWidth = PR_MAX(colFrame->GetPctWidth(), 0);
nscoord fixWidth = PR_MAX(colFrame->GetFixWidth(), 0);
nscoord desWidth = PR_MAX(colFrame->GetDesWidth(), minWidth);
minTotal += minWidth;
if (pctWidth > 0) {
pctTotal += pctWidth;
pctMinTotal += minWidth;
}
else if (fixWidth > 0) {
fixTotal += fixWidth;
fixMinTotal += minWidth;
}
if (colFrame->GetWidth(PCT) + colFrame->GetWidth(FIX) <= 0) {
autoDesTotal += desWidth;
autoMinTotal += minWidth;
numAutoCols++;
}
if ((spanX > 0) && (mTableFrame->GetNumCellsOriginatingInCol(aColIndex + spanX) > 0)) {
spanCellSpacing += spacingX;
}
}
nscoord availWidth = aCellWidth - spanCellSpacing;
if (MIN_CON == aWidthIndex) {
// MIN widths (unlike the others) are added to existing values, so subtract out the min total
availWidth -= minTotal;
pctLimitTotal = ((pctTotal - pctMinTotal) < availWidth) ? pctTotal - pctMinTotal : availWidth;
fixLimitTotal = ((fixTotal - fixMinTotal) < availWidth) ? fixTotal - fixMinTotal : availWidth;
desLimitTotal = ((autoDesTotal - autoMinTotal) < availWidth) ? autoDesTotal - autoMinTotal : availWidth;
}
else { // FIX or DES_CON with LIMIT_NONE
if (FIX == aWidthIndex) {
if (autoDesTotal > 0) {
availWidth -= pctTotal + fixTotal;
}
else if (fixTotal > 0) {
availWidth -= pctTotal;
}
}
else if (DES_CON == aWidthIndex) {
availWidth -= pctTotal + fixTotal;
}
}
// Below are some optimizations which can skip steps.
if (LIMIT_PCT == aLimitType) {
NS_ASSERTION(MIN_CON == aWidthIndex, "invalid call to ComputeNonPctColspanWidths");
// if there are no pct cols, limit fix cols
if (0 == pctTotal) {
aLimitType = LIMIT_FIX;
}
}
if (LIMIT_FIX == aLimitType) {
NS_ASSERTION(MIN_CON == aWidthIndex, "invalid call to ComputeNonPctColspanWidths");
// if there are no fix cols, limit des
if (0 == fixTotal) {
aLimitType = LIMIT_DES;
}
}
if (LIMIT_DES == aLimitType) {
NS_ASSERTION(MIN_CON == aWidthIndex, "invalid call to ComputeNonPctColspanWidths");
// if there are no auto cols, limit none
if (0 == autoDesTotal) {
aLimitType = LIMIT_NONE;
}
}
// there are some cases where allocating up to aCellWidth will not be satisfied
switch (aLimitType) {
case LIMIT_PCT:
if (pctLimitTotal < availWidth) {
// the pct cols won't satisfy the request alone
availWidth = pctLimitTotal;
result = PR_FALSE;
}
break;
case LIMIT_FIX:
if (fixLimitTotal < availWidth) {
// the fix cols won't satisfy the request alone
availWidth = fixLimitTotal;
result = PR_FALSE;
}
break;
case LIMIT_DES:
if (desLimitTotal < availWidth) {
// the auto cols won't satisfy the request alone
availWidth = desLimitTotal;
result = PR_FALSE;
}
break;
default: // LIMIT_NONE
break;
}
if (availWidth > 0) {
nscoord usedWidth = 0;
// get the correct numerator in a similar fashion to getting the divisor
for (spanX = 0; spanX < aColSpan; spanX++) {
if (usedWidth >= availWidth) break;
nsTableColFrame* colFrame = mTableFrame->GetColFrame(aColIndex + spanX);
if (!colFrame) continue;
nscoord minWidth = colFrame->GetMinWidth();
nscoord pctWidth = PR_MAX(colFrame->GetPctWidth(), 0);
nscoord fixWidth = PR_MAX(colFrame->GetFixWidth(), 0);
nscoord desWidth = PR_MAX(colFrame->GetDesWidth(), minWidth);
nscoord colWidth = PR_MAX(colFrame->GetWidth(aWidthIndex),
colFrame->GetWidth(aWidthIndex + NUM_MAJOR_WIDTHS));
colWidth = PR_MAX(colWidth, minWidth);
nscoord numeratorPct = 0;
nscoord numeratorFix = 0;
nscoord numeratorAutoDes = 0;
if (pctWidth > 0) {
numeratorPct = pctWidth;
}
else if (fixWidth > 0) {
numeratorFix = fixWidth;
}
if (colFrame->GetWidth(PCT) + colFrame->GetWidth(FIX) <= 0) {
numeratorAutoDes = desWidth;
}
nscoord divisor = 0;
nscoord numerator = 0;
// let pct cols reach their target
if (LIMIT_PCT == aLimitType) {
if (pctLimitTotal > 0) {
divisor = pctTotal - pctMinTotal;
numerator = PR_MAX(numeratorPct - minWidth, 0);
}
}
// let fix cols reach their target
else if (LIMIT_FIX == aLimitType) {
if (fixLimitTotal > 0) {
divisor = fixTotal - fixMinTotal;
numerator = PR_MAX(numeratorFix - minWidth, 0);
}
}
// let auto cols reach their target
else if (LIMIT_DES == aLimitType) {
if (desLimitTotal > 0) {
if (autoDesTotal > 0) { // there were auto cols
divisor = autoDesTotal - autoMinTotal;
numerator = PR_MAX(numeratorAutoDes - minWidth, 0);
}
else if (fixTotal > 0) { // there were fix cols but no auto
divisor = fixTotal - fixMinTotal;
numerator = PR_MAX(numeratorFix - minWidth, 0);
}
else if (pctTotal > 0) { // there were only pct cols
divisor = pctTotal - pctMinTotal;
numerator = PR_MAX(numeratorPct - minWidth, 0);
}
else continue;
}
}
else if (LIMIT_NONE == aLimitType) {
if ((MIN_CON == aWidthIndex) && (0 == minTotal)) {
// divide evenly among the spanned cols
divisor = aColSpan;
numerator = 1;
}
else {
if (autoDesTotal > 0) { // there were auto cols
divisor = autoDesTotal;
numerator = numeratorAutoDes;
}
else if (fixTotal > 0) { // there were fix cols but no auto
divisor = fixTotal;
numerator = numeratorFix;
}
else if (pctTotal > 0) { // there were only pct cols
divisor = pctTotal;
numerator = numeratorPct;
}
else continue;
}
}
// calculate the adj col width
nscoord newColAdjWidth = (0 >= divisor)
? NSToCoordRound( ((float)availWidth) / ((float)aColSpan) )
: NSToCoordRound( (((float)numerator) / ((float)divisor)) * availWidth);
newColAdjWidth = nsTableFrame::RoundToPixel(newColAdjWidth, aPixelToTwips);
// don't let the new allocation exceed the avail total
newColAdjWidth = PR_MIN(newColAdjWidth, availWidth - usedWidth);
// put the remainder of the avail total in the last spanned col
if (spanX == aColSpan - 1) {
newColAdjWidth = availWidth - usedWidth;
}
usedWidth += newColAdjWidth;
// MIN_CON gets added to what is there, the others don't
if (MIN_CON == aWidthIndex) {
newColAdjWidth += colWidth;
}
if (newColAdjWidth > colWidth) {
if (FIX == aWidthIndex) {
// a colspan cannot fix a column below what a cell desires on its own
nscoord desCon = colFrame->GetWidth(DES_CON); // do not consider DES_ADJ
if (desCon > newColAdjWidth) {
newColAdjWidth = desCon;
}
}
colFrame->SetWidth(aWidthIndex + NUM_MAJOR_WIDTHS, newColAdjWidth);
}
else {
if((newColAdjWidth > 0) && (FIX == aWidthIndex)) {
if(colFrame->GetWidth(FIX) < 0) {
nscoord desCon = colFrame->GetWidth(DES_CON);
if (desCon > newColAdjWidth) {
newColAdjWidth = desCon;
}
}
if(colFrame->GetWidth(FIX_ADJ) < newColAdjWidth) {
colFrame->SetWidth(FIX_ADJ, PR_MAX(colWidth,newColAdjWidth));
}
}
}
}
}
#ifdef DEBUG_TABLE_STRATEGY
DumpColWidths(*mTableFrame, "exit ComputeNonPctColspanWidths", aCellFrame, aColIndex, aWidthIndex, aLimitType);
#endif
return result;
}
// XXX percent left and right padding are not figured in the calculations
// The table frame needs to be used as the percent base because the reflow
// state may have an unconstrained width. There should probably be a frame
// state bit indicating that horizontal padding is percentage based.
// Determine min, desired, fixed, and proportional sizes for the cols and
// and calculate min/max table width. Return true if there is at least one pct cell or col
PRBool
BasicTableLayoutStrategy::AssignNonPctColumnWidths(nscoord aMaxWidth,
const nsHTMLReflowState& aReflowState)
{
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eNonPctCols, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_TRUE);
#endif
#ifdef DEBUG_TABLE_STRATEGY
printf("AssignNonPctColWidths en max=%d count=%d \n", aMaxWidth, gsDebugCount++); mTableFrame->Dump(PR_FALSE, PR_TRUE, PR_FALSE);
#endif
PRInt32 numRows = mTableFrame->GetRowCount();
PRInt32 numCols = mTableFrame->GetColCount();
nscoord spacingX = mTableFrame->GetCellSpacingX();
PRInt32 colX, rowX;
mCellSpacingTotal = 0;
PRBool hasPctCol = PR_FALSE; // return value
float pixelToTwips = mTableFrame->GetPresContext()->ScaledPixelsToTwips();
PRInt32 rawPropTotal = -1; // total of numbers of the type 1*, 2*, etc
PRInt32 numColsForColsAttr = 0; // Nav Quirks cols attribute for equal width cols
if (NS_STYLE_TABLE_COLS_NONE != mCols) {
numColsForColsAttr = (NS_STYLE_TABLE_COLS_ALL == mCols) ? numCols : mCols;
}
// For every column, determine it's min and desired width based on cell style
// base on cells which do not span cols. Also, determine mCellSpacingTotal
for (colX = 0; colX < numCols; colX++) {
nscoord minWidth = 0;
nscoord desWidth = 0;
nscoord fixWidth = WIDTH_NOT_SET;
// Get column frame and reset it
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
NS_ASSERTION(nsnull != colFrame, "bad col frame");
colFrame->ResetSizingInfo();
if (mTableFrame->GetNumCellsOriginatingInCol(colX) > 0) {
mCellSpacingTotal += spacingX;
}
// Scan the cells in the col that have colspan = 1 and find the maximum
// min, desired, and fixed cells.
nsTableCellFrame* fixContributor = nsnull;
nsTableCellFrame* desContributor = nsnull;
for (rowX = 0; rowX < numRows; rowX++) {
PRBool originates;
PRInt32 colSpan;
nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan);
// skip cells that don't originate at (rowX, colX); colspans are handled in the
// next pass, row spans don't need to be handled
if (!cellFrame || !originates || (colSpan > 1)) {
continue;
}
// these values include borders and padding
minWidth = PR_MAX(minWidth, cellFrame->GetPass1MaxElementWidth());
nscoord cellDesWidth = cellFrame->GetMaximumWidth();
if (cellDesWidth > desWidth) {
desContributor = cellFrame;
desWidth = cellDesWidth;
}
// see if the cell has a style width specified
const nsStylePosition* cellPosition = cellFrame->GetStylePosition();
if (eStyleUnit_Coord == cellPosition->mWidth.GetUnit()) {
nscoord coordValue = cellPosition->mWidth.GetCoordValue();
if (coordValue > 0) { // ignore if width == 0
// need to add border and padding into fixed width
nsSize percentBase(aReflowState.mComputedWidth, 0);
nsMargin borderPadding = nsTableFrame::GetBorderPadding(percentBase, pixelToTwips, cellFrame);
nscoord newFixWidth = coordValue + borderPadding.left + borderPadding.right;
// 2nd part of condition is Nav/IE Quirk like below
if ((newFixWidth > fixWidth) || ((newFixWidth == fixWidth) && (desContributor == cellFrame))) {
fixWidth = newFixWidth;
fixContributor = cellFrame;
}
}
}
if (!hasPctCol && HasPctValue(cellFrame)) { // see if there is a pct cell
hasPctCol = PR_TRUE;
}
}
// Nav/IE Quirk like above
if (fixWidth > 0) {
if (mIsNavQuirksMode && (desWidth > fixWidth) && (fixContributor != desContributor)) {
fixWidth = WIDTH_NOT_SET;
fixContributor = nsnull;
}
}
desWidth = PR_MAX(desWidth, minWidth);
// cache the computed column info
colFrame->SetWidth(MIN_CON, minWidth);
colFrame->SetWidth(DES_CON, desWidth);
if (fixWidth > 0) {
colFrame->SetWidth(FIX, fixWidth);
}
nsStyleCoord colStyleWidth = colFrame->GetStyleWidth();
// determine if there is a proportional column either from html4
// proportional width on a col or Nav Quirks cols attr
if (fixWidth <= 0) {
nscoord proportion = WIDTH_NOT_SET;
if (eStyleUnit_Proportional == colStyleWidth.GetUnit()) {
proportion = colStyleWidth.GetIntValue();
}
else if (colX < numColsForColsAttr) {
proportion = 1;
if ((eStyleUnit_Percent == colStyleWidth.GetUnit()) &&
(colStyleWidth.GetPercentValue() > 0.0f)) {
proportion = WIDTH_NOT_SET;
}
}
if (proportion >= 0) {
rawPropTotal = PR_MAX(rawPropTotal, 0); // it was initialized to -1
colFrame->SetWidth(MIN_PRO, proportion);
nsColConstraint colConstraint = (0 == proportion)
? e0ProportionConstraint : eProportionConstraint;
rawPropTotal += proportion;
colFrame->SetConstraint(colConstraint);
}
}
if (!hasPctCol) { // see if there is a pct col
if (eStyleUnit_Percent == colStyleWidth.GetUnit()) {
float percent = colStyleWidth.GetPercentValue();
if (percent > 0.0f) {
hasPctCol = PR_TRUE;
}
}
}
}
if (mCellSpacingTotal > 0) {
mCellSpacingTotal += spacingX; // add last cell spacing on right
}
//set the table col fixed width if present
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord fixColWidth = colFrame->GetWidth(FIX);
// use the style width of a col only if the col hasn't gotten a fixed width from any cell
if (fixColWidth <= 0) {
nsStyleCoord colStyleWidth = colFrame->GetStyleWidth();
if (eStyleUnit_Coord == colStyleWidth.GetUnit()) {
fixColWidth = colStyleWidth.GetCoordValue();
if (fixColWidth > 0) {
colFrame->SetWidth(FIX, fixColWidth);
}
}
}
}
PRBool* pctRequest = (hasPctCol) ? nsnull : &hasPctCol;
ComputeNonPctColspanWidths(aReflowState, PR_FALSE, pixelToTwips, pctRequest);
PRInt32 numEffCols = mTableFrame->GetEffectiveColCount();
// figure the proportional widths for porportional cols
if (rawPropTotal > 0) {
// find the largest combined prop size considering each prop col and
// its desired size
nscoord maxPropTotal = 0;
for (colX = 0; colX < numEffCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
nscoord rawProp = colFrame->GetWidth(MIN_PRO);
if (rawProp > 0) {
nscoord desWidth = colFrame->GetDesWidth();
nscoord propTotal = NSToCoordRound( ((float)desWidth) * ((float)rawPropTotal) / (float)rawProp );
propTotal = nsTableFrame::RoundToPixel(propTotal, pixelToTwips);
maxPropTotal = PR_MAX(maxPropTotal, propTotal);
}
}
// set MIN_PRO widths based on the maxPropTotal
for (colX = 0; colX < numEffCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord rawProp = colFrame->GetWidth(MIN_PRO);
if (0 == rawProp) {
// a 0* col gets only the min width
colFrame->SetWidth(MIN_PRO, colFrame->GetMinWidth());
}
else if ((rawProp > 0) && (rawPropTotal > 0)) {
nscoord propWidth = NSToCoordRound( ((float)maxPropTotal) * ((float)rawProp) / (float)rawPropTotal ) ;
propWidth = nsTableFrame::RoundToPixel(propWidth, pixelToTwips);
colFrame->SetWidth(MIN_PRO, PR_MAX(propWidth, colFrame->GetMinWidth()));
}
}
}
// Set the table col width for each col to the content min.
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord minWidth = colFrame->GetMinWidth();
mTableFrame->SetColumnWidth(colX, minWidth);
}
#ifdef DEBUG_TABLE_STRATEGY
printf("AssignNonPctColWidths ex\n"); mTableFrame->Dump(PR_FALSE, PR_TRUE, PR_FALSE);
#endif
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::eNonPctCols, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_FALSE);
#endif
return hasPctCol;
}
void
BasicTableLayoutStrategy::ReduceOverSpecifiedPctCols(nscoord aExcess)
{
nscoord numCols = mTableFrame->GetColCount();
for (PRInt32 colX = numCols - 1; (colX >= 0) && (aExcess > 0); colX--) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord pctWidth = colFrame->GetWidth(PCT);
nscoord reduction = 0;
if (pctWidth > 0) {
reduction = (aExcess > pctWidth) ? pctWidth : aExcess;
nscoord newPctWidth = (reduction == pctWidth) ? WIDTH_NOT_SET : pctWidth - reduction;
colFrame->SetWidth(PCT, PR_MAX(newPctWidth, colFrame->GetMinWidth()));
}
else {
nscoord pctAdjWidth = colFrame->GetWidth(PCT_ADJ);
if (pctAdjWidth > 0) {
reduction = (aExcess > pctAdjWidth) ? pctAdjWidth : aExcess;
nscoord newPctAdjWidth = (reduction == pctAdjWidth) ? WIDTH_NOT_SET : pctAdjWidth - reduction;
colFrame->SetWidth(PCT_ADJ, PR_MAX(newPctAdjWidth, colFrame->GetMinWidth()));
}
}
aExcess -= reduction;
}
}
#ifdef DEBUG_TABLE_REFLOW_TIMING
nscoord WrapupAssignPctColumnWidths(nsTableFrame* aTableFrame,
const nsHTMLReflowState& aReflowState,
nscoord aValue)
{
nsTableFrame::DebugTimeMethod(nsTableFrame::ePctCols, *aTableFrame, (nsHTMLReflowState&)aReflowState, PR_FALSE);
return aValue;
}
#else
inline nscoord WrapupAssignPctColumnWidths(nsTableFrame* aTableFrame,
const nsHTMLReflowState& aReflowState,
nscoord aValue)
{
return aValue;
}
#endif
nscoord
BasicTableLayoutStrategy::CalcPctAdjTableWidth(const nsHTMLReflowState& aReflowState,
nscoord aAvailWidthIn)
{
NS_ASSERTION(mTableFrame->IsAutoWidth() && mTableFrame->HasPctCol(), "invalid call");
PRInt32 numRows = mTableFrame->GetRowCount();
PRInt32 numCols = mTableFrame->GetColCount(); // consider cols at end without orig cells
PRInt32 colX, rowX;
float pixelToTwips = mTableFrame->GetPresContext()->ScaledPixelsToTwips();
// For an auto table, determine the potentially new percent adjusted width based
// on percent cells/cols. This probably should only be a NavQuirks thing, since
// a percentage based cell or column on an auto table should force the column to auto
nscoord basis = 0;
float* rawPctValues = new float[numCols]; // store the raw pct values, allow for spans past the effective numCols
if (!rawPctValues) return NS_ERROR_OUT_OF_MEMORY;
for (colX = 0; colX < numCols; colX++) {
rawPctValues[colX] = 0.0f;
}
nsMargin borderPadding = mTableFrame->GetContentAreaOffset(&aReflowState);
nscoord availWidth = aAvailWidthIn;
if (NS_UNCONSTRAINEDSIZE != availWidth) {
// adjust the avail width to exclude table border, padding and cell spacing
availWidth -= borderPadding.left + borderPadding.right + mCellSpacingTotal;
}
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord maxColBasis = -1;
// Scan the cells in the col
for (rowX = 0; rowX < numRows; rowX++) {
PRBool originates;
PRInt32 colSpan;
nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan);
if (!originates) continue; // skip cells that don't originate in the col
// see if the cell has a style percent width specified
const nsStylePosition* cellPosition = cellFrame->GetStylePosition();
if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) {
float percent = cellPosition->mWidth.GetPercentValue();
if (percent > 0.0f) {
// calculate the preferred width of the cell based on fix, des, widths of the cols it spans
nscoord cellDesWidth = 0;
float spanPct = percent / float(colSpan);
for (PRInt32 spanX = 0; spanX < colSpan; spanX++) {
nsTableColFrame* spanFrame = mTableFrame->GetColFrame(colX + spanX);
if (!spanFrame) continue;
cellDesWidth += spanFrame->GetWidth(DES_CON); // don't consider DES_ADJ
// crudely allocate pct values to the spanning cols so that we can check if they exceed 100 pct below
rawPctValues[colX + spanX] = PR_MAX(rawPctValues[colX + spanX], spanPct);
}
// consider the cell's preferred width
cellDesWidth = PR_MAX(cellDesWidth, cellFrame->GetMaximumWidth());
nscoord colBasis = nsTableFrame::RoundToPixel(NSToCoordRound((float)cellDesWidth / percent), pixelToTwips);
maxColBasis = PR_MAX(maxColBasis, colBasis);
}
}
}
if (-1 == maxColBasis) {
// see if the col has a style percent width specified
nsStyleCoord colStyleWidth = colFrame->GetStyleWidth();
if (eStyleUnit_Percent == colStyleWidth.GetUnit()) {
float percent = colStyleWidth.GetPercentValue();
maxColBasis = 0;
if (percent > 0.0f) {
rawPctValues[colX] = PR_MAX(rawPctValues[colX], percent);
nscoord desWidth = colFrame->GetWidth(DES_CON); // don't consider DES_ADJ
maxColBasis = nsTableFrame::RoundToPixel(NSToCoordRound((float)desWidth / percent), pixelToTwips);
}
}
}
basis = PR_MAX(basis, maxColBasis);
} // end for (colX ..
float perTotal = 0.0f; // total of percentage constrained cols and/or cells in cols
PRInt32 numPerCols = 0; // number of colums that have percentage constraints
nscoord fixDesTotal = 0; // total of fix or des widths of cols
nscoord fixDesTotalNoPct = 0; // total of fix or des widths of cols without pct
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord fixWidth = colFrame->GetFixWidth();
nscoord fixDesWidth = (fixWidth > 0) ? fixWidth : colFrame->GetDesWidth();
fixDesTotal += fixDesWidth;
if (rawPctValues[colX] + perTotal > 1.0f) {
rawPctValues[colX] = PR_MAX(1.0f - perTotal, 0.0f);
}
if (rawPctValues[colX] > 0.0f) {
numPerCols++;
perTotal += rawPctValues[colX];
}
else {
fixDesTotalNoPct += fixDesWidth;
}
}
delete [] rawPctValues; // destroy the raw pct values
// If there are no pct cells or cols, there is nothing to do.
if ((0 == numPerCols) || (0.0f == perTotal)) {
NS_ASSERTION(PR_FALSE, "invalid call");
return basis;
}
// If there is only one col and it is % based, it won't affect anything
if ((1 == numCols) && (numCols == numPerCols)) {
return basis + borderPadding.left + borderPadding.right + mCellSpacingTotal;
}
// compute a basis considering total percentages and the desired width of everything else
if ((perTotal > 0.0f) && (perTotal < 1.0f)) {
nscoord otherBasis = nsTableFrame::RoundToPixel(NSToCoordRound((float)fixDesTotalNoPct / (1.0f - perTotal)), pixelToTwips);
basis = PR_MAX(basis, otherBasis);
}
else if ((fixDesTotalNoPct > 0) && (NS_UNCONSTRAINEDSIZE != availWidth)) { // make the basis as big as possible
basis = availWidth; // the 100% cols force as big a width as possible
}
basis = PR_MAX(basis, fixDesTotal);
basis = PR_MIN(basis, availWidth); // don't exceed the max we were given
if (NS_UNCONSTRAINEDSIZE != availWidth) {
// add back the table border, padding and cell spacing
basis += borderPadding.left + borderPadding.right + mCellSpacingTotal;
}
return basis;
}
// Determine percentage col widths for each col frame
nscoord
BasicTableLayoutStrategy::AssignPctColumnWidths(const nsHTMLReflowState& aReflowState,
nscoord aAvailWidth,
PRBool aTableIsAutoWidth,
float aPixelToTwips)
{
#ifdef DEBUG_TABLE_REFLOW_TIMING
nsTableFrame::DebugTimeMethod(nsTableFrame::ePctCols, *mTableFrame, (nsHTMLReflowState&)aReflowState, PR_TRUE);
#endif
mTableFrame->SetHasCellSpanningPctCol(PR_FALSE); // this gets refigured below
PRInt32 numRows = mTableFrame->GetRowCount();
PRInt32 numCols = mTableFrame->GetColCount(); // consider cols at end without orig cells
PRInt32 numEffCols = mTableFrame->GetEffectiveColCount();
nscoord spacingX = mTableFrame->GetCellSpacingX();
PRInt32 colX, rowX;
NS_ASSERTION(NS_UNCONSTRAINEDSIZE != aAvailWidth, "AssignPctColumnWidths has unconstrained avail width");
// For an auto table, determine the potentially new percent adjusted width based
// on percent cells/cols. This probably should only be a NavQuirks thing, since
// a percentage based cell or column on an auto table should force the column to auto
nscoord basis = (aTableIsAutoWidth)
? CalcPctAdjTableWidth(aReflowState, aAvailWidth)
: aAvailWidth;
// adjust the basis to exclude table border, padding and cell spacing
nsMargin borderPadding = mTableFrame->GetContentAreaOffset(&aReflowState);
basis -= borderPadding.left + borderPadding.right + mCellSpacingTotal;
nscoord colPctTotal = 0;
struct nsSpannedEle {
nsSpannedEle *next, *prev;
PRInt32 col, colSpan;
nsTableCellFrame *cellFrame;
};
nsSpannedEle *spanList = 0;
nsSpannedEle *spanTail = 0;
PLArenaPool spanArena;
PL_INIT_ARENA_POOL(&spanArena, "AssignPctColumnWidths", 512);
// Determine the percentage contribution for cols and for cells with colspan = 1
// Iterate backwards, similarly to the reasoning in AssignNonPctColumnWidths
for (colX = numCols - 1; colX >= 0; colX--) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord maxColPctWidth = WIDTH_NOT_SET;
float maxColPct = 0.0f;
nsTableCellFrame* percentContributor = nsnull;
// Scan the cells in the col that have colspan = 1; assign PER widths
for (rowX = 0; rowX < numRows; rowX++) {
PRBool originates;
PRInt32 colSpan;
nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan);
// skip cells that don't originate at (rowX, colX)
if (!cellFrame || !originates) {
continue;
}
// colspans are handled in the next pass, but we record them here so we dont have to
// search for the again. row spans do not need to be handled.
if(colSpan>1) {
nsSpannedEle *spanned;
ARENA_ALLOCATE(spanned, &spanArena, 1, nsSpannedEle);
if(spanned) {
spanned->col = colX;
spanned->colSpan = colSpan;
spanned->cellFrame = cellFrame;
spanned->next = spanList;
spanned->prev = nsnull;
if(spanList) {
spanList->prev = spanned;
} else {
spanTail = spanned;
}
spanList = spanned;
}
continue;
}
// see if the cell has a style percent width specified
const nsStylePosition* cellPosition = cellFrame->GetStylePosition();
if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) {
float percent = cellPosition->mWidth.GetPercentValue();
if (percent > maxColPct) {
maxColPct = percent;
maxColPctWidth = nsTableFrame::RoundToPixel(NSToCoordRound( ((float)basis) * maxColPct ), aPixelToTwips);
percentContributor = cellFrame;
if (!mIsNavQuirksMode) {
// need to add border and padding
nsMargin cellBorderPadding = nsTableFrame::GetBorderPadding(nsSize(basis, 0), aPixelToTwips, cellFrame);
maxColPctWidth += cellBorderPadding.left + cellBorderPadding.right;
}
}
}
}
if (WIDTH_NOT_SET == maxColPctWidth) {
// see if the col has a style percent width specified
nsStyleCoord colStyleWidth = colFrame->GetStyleWidth();
if (eStyleUnit_Percent == colStyleWidth.GetUnit()) {
maxColPct = colStyleWidth.GetPercentValue();
maxColPctWidth = nsTableFrame::RoundToPixel(NSToCoordRound( ((float)basis) * maxColPct ), aPixelToTwips);
}
}
// conflicting pct/fixed widths are recorded. Nav 4.x may be changing the
// fixed width value if it exceeds the pct value and not recording the pct
// value. This is not being done and IE5 doesn't do it either.
if (maxColPctWidth > 0) {
maxColPctWidth = PR_MAX(maxColPctWidth, colFrame->GetWidth(MIN_CON));
colFrame->SetWidth(PCT, maxColPctWidth);
colPctTotal += NSToCoordRound(100.0f * (float)maxColPct);
}
}
// if the percent total went over 100%, adjustments need to be made to right most cols
if (colPctTotal > 100) {
ReduceOverSpecifiedPctCols(nsTableFrame::RoundToPixel(NSToCoordRound(((float)(colPctTotal - 100)) * 0.01f * (float)basis), aPixelToTwips));
colPctTotal = 100;
}
// check to see if a cell spans a percentage col. This will cause the MIN_ADJ,
// FIX_ADJ, and DES_ADJ values to be recomputed
PRBool done = PR_FALSE;
nsSpannedEle *spannedCell;
for(spannedCell=spanList; !done && spannedCell; spannedCell=spannedCell->next)
{
colX = spannedCell->col;
PRInt32 colSpan = spannedCell->colSpan;
// determine if the cell spans cols which have a pct value
for (PRInt32 spanX = 0; spanX < colSpan; spanX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX);
if (!colFrame) continue;
if (colFrame->GetWidth(PCT) > 0) {
mTableFrame->SetHasCellSpanningPctCol(PR_TRUE);
// recompute the MIN_ADJ, FIX_ADJ, and DES_ADJ values
ComputeNonPctColspanWidths(aReflowState, PR_TRUE, aPixelToTwips, nsnull);
done = PR_TRUE;
break;
}
}
}
// For each col, consider the cells originating in it with colspans > 1.
// Adjust the cols that each cell spans if necessary.
// if more than one colspan originate in one column, resort the access to
// the rows so that the inner colspans are handled first
CellInfo* cellInfo = nsnull;
if(spanTail)
ARENA_ALLOCATE(cellInfo, &spanArena, numRows, CellInfo);
if(cellInfo) for(spannedCell=spanTail; spannedCell;) {
PRInt32 spannedRows = 0;
colX = spannedCell->col;
do {
cellInfo[spannedRows].cellFrame = spannedCell->cellFrame;
cellInfo[spannedRows].colSpan = spannedCell->colSpan;
++spannedRows;
} while((spannedCell=spannedCell->prev) && (spannedCell->col==colX));
if(spannedRows>1) {
NS_QuickSort(cellInfo, spannedRows, sizeof(cellInfo[0]), RowSortCB, 0);
}
for (PRInt32 i = 0; i < spannedRows; i++) {
const CellInfo *inf = &cellInfo[i];
const nsTableCellFrame* cellFrame = inf->cellFrame;
const PRInt32 colSpan = PR_MIN(inf->colSpan, numEffCols - colX);
nscoord cellPctWidth = WIDTH_NOT_SET;
// see if the cell has a style percentage width specified
const nsStylePosition* cellPosition = cellFrame->GetStylePosition();
float cellPct = 0.0f;
if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) {
cellPct = cellPosition->mWidth.GetPercentValue();
if (colSpan == numEffCols)
cellPct = 1.0f; // overwrite spurious percent colspan width's - bug 46944
cellPctWidth = nsTableFrame::RoundToPixel(NSToCoordRound( ((float)basis) * cellPct ), aPixelToTwips);
if (!mIsNavQuirksMode) {
// need to add border and padding
nsMargin cellBorderPadding = nsTableFrame::GetBorderPadding(nsSize(basis, 0), aPixelToTwips, cellFrame);
cellPctWidth += cellBorderPadding.left + cellBorderPadding.right;
}
}
if (cellPctWidth > 0) {
nscoord spanCellSpacing = 0;
nscoord spanTotal = 0;
nscoord spanTotalNoPctAdj = 0;
nscoord colPctWidthTotal = 0; // accumulate the PCT width
nscoord colPctAdjTotal = 0; // accumulate the PCT_ADJ width or the max of PCT_ADJ and PCT width if a
// PCT width is specified
PRBool canSkipPctAdj = PR_FALSE;
// accumulate the spanTotal as the max of MIN, DES, FIX, PCT
PRInt32 spanX;
for (spanX = 0; spanX < colSpan; spanX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX);
if (!colFrame) continue;
nscoord colPctWidth = colFrame->GetWidth(PCT);
if (colPctWidth > 0) { // skip pct cols
colPctWidthTotal += colPctWidth;
colPctAdjTotal += PR_MAX(colFrame->GetWidth(PCT_ADJ), colPctWidth);
continue;
}
colPctAdjTotal += PR_MAX(colFrame->GetWidth(PCT_ADJ), 0);
nscoord colWidth = PR_MAX(colFrame->GetMinWidth(), colFrame->GetFixWidth());
colWidth = PR_MAX(colWidth, colFrame->GetDesWidth()); // XXX check this
//colWidth = PR_MAX(colWidth, colFrame->GetPctWidth());
spanTotal += colWidth;
if (colFrame->GetWidth(PCT_ADJ) <= 0) { // if we have a cell that is neither PCT or PCT_ADJ we have
// other places where we can drop the width
canSkipPctAdj = PR_TRUE;
spanTotalNoPctAdj += colWidth;
}
if ((spanX > 0) && (mTableFrame->GetNumCellsOriginatingInCol(colX + spanX) > 0)) {
spanCellSpacing += spacingX;
}
}
cellPctWidth += spanCellSpacing; // add it back in since it was subtracted from aBasisIn
if (cellPctWidth <= 0) {
continue;
}
spanTotal = canSkipPctAdj ? spanTotalNoPctAdj: spanTotal; // if we can skip the PCT_ADJ ignore theire width
colPctWidthTotal = canSkipPctAdj ? colPctAdjTotal: colPctWidthTotal;
if ((PR_MAX(colPctWidthTotal, colPctAdjTotal)+ spanCellSpacing) < cellPctWidth) {
// we have something to distribute ...
// record the percent contributions for the spanned cols
PRInt32 usedColumns = colSpan;
for (spanX = colSpan-1; spanX >= 0; spanX--) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX);
if (!colFrame) continue;
if ((colFrame->GetWidth(PCT) > 0) || (canSkipPctAdj && (colFrame->GetWidth(PCT_ADJ) > 0))) {
// dont use pct cols or if we can skip the pct adj event do not take the PCT_ADJ cols
usedColumns--;
continue;
} // count the pieces
if (usedColumns == 0)
usedColumns = 1; // avoid division by 0 later
nscoord minWidth = colFrame->GetMinWidth();
nscoord colWidth = PR_MAX(minWidth, colFrame->GetFixWidth());
colWidth = PR_MAX(colWidth, colFrame->GetDesWidth()); // XXX check this
float avail = (float)PR_MAX(cellPctWidth - colPctWidthTotal, 0);
float colPctAdj = (0 == spanTotal)
? avail / ((float) usedColumns) / ((float)basis)
: (avail / (float)basis) * (((float)colWidth) / (float)spanTotal);
if (colPctAdj > 0) {
nscoord colPctAdjWidth = colFrame->GetWidth(PCT_ADJ);
nscoord newColPctAdjWidth = nsTableFrame::RoundToPixel(NSToCoordRound(colPctAdj * (float)basis), aPixelToTwips);
if (newColPctAdjWidth > colPctAdjWidth) {
newColPctAdjWidth = PR_MAX(newColPctAdjWidth, minWidth);
if (newColPctAdjWidth > colFrame->GetWidth(PCT)) {
colFrame->SetWidth(PCT_ADJ, newColPctAdjWidth);
if(0 != basis) { // I am paranoid
colPctTotal += NSToCoordRound(100.0f *(newColPctAdjWidth-colPctAdjWidth) / (float)basis);
// accumulate the new distributed percents
}
}
}
else {
usedColumns--;
colPctWidthTotal += colPctAdjWidth; // accumulate the already distributed percents
}
}
}
}
}
} // end for (index ..
} // end for (colX ..
// We are done with our spanlist, get rid of it now
PL_FinishArenaPool(&spanArena);
// if the percent total went over 100%, adjustments need to be made to right most cols
if (colPctTotal > 100) {
ReduceOverSpecifiedPctCols(nsTableFrame::RoundToPixel(NSToCoordRound(((float)(colPctTotal - 100)) * 0.01f * (float)basis), aPixelToTwips));
}
// adjust the basis to include table border, padding and cell spacing
basis += borderPadding.left + borderPadding.right + mCellSpacingTotal;
return WrapupAssignPctColumnWidths(mTableFrame, aReflowState, basis);
}
// calculate totals by width type. The logic here is kept in synch with
// that in CanAllocate. aDupedWidths (duplicatd) are widths that will be
// allocated in BalanceColumnWidths before aTotalsWidths (e.g. aTotalWidths[PCT]
// will have aDuplicatedWidths[PCT] consisting of the MIN widths of cols which
// have a PCT width).
void BasicTableLayoutStrategy::CalculateTotals(PRInt32* aTotalCounts,
PRInt32* aTotalWidths,
PRInt32* aDupedWidths,
PRInt32& a0ProportionalCount)
{
//mTableFrame->Dump(PR_TRUE, PR_FALSE);
for (PRInt32 widthX = 0; widthX < NUM_WIDTHS; widthX++) {
aTotalCounts[widthX] = 0;
aTotalWidths[widthX] = 0;
aDupedWidths[widthX] = 0;
}
a0ProportionalCount = 0;
PRInt32 numEffCols = mTableFrame->GetEffectiveColCount();
PRInt32 colX;
for (colX = 0; colX < numEffCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
nscoord minCol = colFrame->GetMinWidth();
aTotalCounts[MIN_CON]++;
aTotalWidths[MIN_CON] += minCol;
if (e0ProportionConstraint == colFrame->GetConstraint()) {
a0ProportionalCount++;
}
nscoord pct = colFrame->GetPctWidth();
nscoord fix = colFrame->GetWidth(FIX);
nscoord fixAdj = colFrame->GetWidth(FIX_ADJ);
// if there is a pct width then no others are considered
if (pct > 0) {
aTotalCounts[PCT]++;
aTotalWidths[PCT] += PR_MAX(pct, minCol);
aDupedWidths[PCT] += minCol;
}
else if ((fix > 0) || (fixAdj > 0)) {
if (fix > 0) {
aTotalCounts[FIX]++;
aTotalWidths[FIX] += PR_MAX(fix, minCol);
aDupedWidths[FIX] += minCol;
}
if (fixAdj > 0) {
if (fixAdj > fix) {
aTotalCounts[FIX_ADJ]++;
aTotalWidths[FIX_ADJ] += PR_MAX(fixAdj, minCol);
if (fix > 0) {
aDupedWidths[FIX_ADJ] += fix;
}
else { // there was no fix
aDupedWidths[FIX_ADJ] += minCol;
}
}
}
}
else if ((eProportionConstraint == colFrame->GetConstraint()) ||
(e0ProportionConstraint == colFrame->GetConstraint())) {
aTotalCounts[MIN_PRO]++;
aTotalWidths[MIN_PRO] += PR_MAX(colFrame->GetWidth(MIN_PRO), minCol);
aDupedWidths[MIN_PRO] += minCol;
}
else {
// desired alone is lowest priority
aTotalCounts[DES_CON]++;
aTotalWidths[DES_CON] += PR_MAX(colFrame->GetDesWidth(), minCol);
aDupedWidths[DES_CON] += minCol;
}
}
}
struct ColInfo {
ColInfo(nsTableColFrame* aFrame,
PRInt32 aIndex,
PRInt32 aMinWidth,
PRInt32 aWidth,
PRInt32 aMaxWidth)
: mFrame(aFrame), mIndex(aIndex), mMinWidth(aMinWidth),
mWidth(aWidth), mMaxWidth(aMaxWidth), mWeight(0)
{}
nsTableColFrame* mFrame;
PRInt32 mIndex;
PRInt32 mMinWidth;
PRInt32 mWidth;
PRInt32 mMaxWidth;
float mWeight;
};
void
AC_Wrapup(nsTableFrame* aTableFrame,
PRInt32 aNumItems,
ColInfo** aColInfo,
PRBool aAbort = PR_FALSE)
{
if (aColInfo) {
for (PRInt32 i = 0; i < aNumItems; i++) {
if (aColInfo[i]) {
if (!aAbort) {
aTableFrame->SetColumnWidth(aColInfo[i]->mIndex, aColInfo[i]->mWidth);
}
delete aColInfo[i];
}
}
delete [] aColInfo;
}
}
void
AC_Increase(PRInt32 aNumAutoCols,
ColInfo** aColInfo,
PRInt32 aDivisor,
PRInt32& aAvailWidth,
float aPixelToTwips)
{
for (PRInt32 i = 0; i < aNumAutoCols; i++) {
if ((aAvailWidth <= 0) || (aDivisor <= 0)) {
break;
}
// aDivisor represents the sum of unallocated space (diff between max and min values)
float percent = ((float)aColInfo[i]->mMaxWidth - (float)aColInfo[i]->mMinWidth) / (float)aDivisor;
aDivisor -= aColInfo[i]->mMaxWidth - aColInfo[i]->mMinWidth;
nscoord addition = nsTableFrame::RoundToPixel(NSToCoordRound(((float)(aAvailWidth)) * percent), aPixelToTwips);
// if its the last col, try to give what's left to it
if ((i == aNumAutoCols - 1) && (addition < aAvailWidth)) {
addition = aAvailWidth;
}
// don't let the addition exceed what is available to add
addition = PR_MIN(addition, aAvailWidth);
// don't go over the col max
addition = PR_MIN(addition, aColInfo[i]->mMaxWidth - aColInfo[i]->mWidth);
aColInfo[i]->mWidth += addition;
aAvailWidth -= addition;
}
}
void
AC_Decrease(PRInt32 aNumAutoCols,
ColInfo** aColInfo,
PRInt32 aDivisor,
PRInt32& aExcess,
float aPixelToTwips)
{
for (PRInt32 i = 0; i < aNumAutoCols; i++) {
if ((aExcess <= 0) || (aDivisor <= 0)) {
break;
}
float percent = ((float)aColInfo[i]->mMaxWidth) / (float)aDivisor;
aDivisor -= aColInfo[i]->mMaxWidth;
nscoord reduction = nsTableFrame::RoundToPixel(NSToCoordRound(((float)(aExcess)) * percent), aPixelToTwips);
// if its the last col, try to remove the remaining excess from it
if ((i == aNumAutoCols - 1) && (reduction < aExcess)) {
reduction = aExcess;
}
// don't let the reduction exceed what is available to reduce
reduction = PR_MIN(reduction, aExcess);
// don't go under the col min
reduction = PR_MIN(reduction, aColInfo[i]->mWidth - aColInfo[i]->mMinWidth);
aColInfo[i]->mWidth -= reduction;
aExcess -= reduction;
}
}
void
AC_Sort(ColInfo** aColInfo, PRInt32 aNumCols)
{
// sort the cols based on the Weight
for (PRInt32 j = aNumCols - 1; j > 0; j--) {
for (PRInt32 i = 0; i < j; i++) {
if (aColInfo[i]->mWeight < aColInfo[i+1]->mWeight) { // swap them
ColInfo* save = aColInfo[i];
aColInfo[i] = aColInfo[i+1];
aColInfo[i+1] = save;
}
}
}
}
// this assumes that the table has set the width for each col to be its min
void BasicTableLayoutStrategy::AllocateConstrained(PRInt32 aAvailWidth,
PRInt32 aWidthType,
PRBool aStartAtMin,
PRInt32* aAllocTypes,
float aPixelToTwips)
{
if ((0 == aAvailWidth) || (aWidthType < 0) || (aWidthType >= NUM_WIDTHS)) {
NS_ASSERTION(PR_TRUE, "invalid args to AllocateConstrained");
return;
}
PRInt32 numCols = mTableFrame->GetColCount();
PRInt32 numConstrainedCols = 0;
nscoord sumMaxConstraints = 0;
nscoord sumMinConstraints = 0;
PRInt32 colX;
// find out how many constrained cols there are
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
if (!CanAllocate(aWidthType, aAllocTypes[colX], colFrame)) {
continue;
}
numConstrainedCols++;
}
// allocate storage for the constrained cols. Only they get adjusted.
ColInfo** colInfo = new ColInfo*[numConstrainedCols];
if (!colInfo) return;
memset(colInfo, 0, numConstrainedCols * sizeof(ColInfo *));
PRInt32 maxMinDiff = 0;
PRInt32 constrColX = 0;
// set the col info entries for each constrained col
for (colX = 0; colX < numCols; colX++) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX);
if (!colFrame) continue;
if (!CanAllocate(aWidthType, aAllocTypes[colX], colFrame)) {
continue;
}
nscoord minWidth = mTableFrame->GetColumnWidth(colX);
nscoord maxWidth = GetColWidth(colFrame, aWidthType);
// proportional and desired widths are handled together
PRBool haveProWidth = PR_FALSE;
if (DES_CON == aWidthType) {
// Take into acount MIN_adj width as it has been included in totals before
maxWidth = PR_MAX(maxWidth, colFrame->GetWidth(MIN_ADJ));
nscoord proWidth = colFrame->GetWidth(MIN_PRO);
if (proWidth >= 0) {
haveProWidth = PR_TRUE;
maxWidth = proWidth;
}
}
if (maxWidth <= 0) continue;
sumMaxConstraints += maxWidth;
sumMinConstraints += minWidth;
maxWidth = PR_MAX(maxWidth, minWidth);
maxMinDiff += maxWidth - minWidth;
nscoord startWidth = (aStartAtMin) ? minWidth : maxWidth;
colInfo[constrColX] = new ColInfo(colFrame, colX, minWidth, startWidth, maxWidth);
if (!colInfo[constrColX]) {
AC_Wrapup(mTableFrame, numConstrainedCols, colInfo, PR_TRUE);
return;
}
aAllocTypes[colX] = (haveProWidth) ? MIN_PRO : aWidthType;
constrColX++;
}
if (constrColX < numConstrainedCols) {
// some of the constrainted cols might have been 0 and skipped
numConstrainedCols = constrColX;
}
PRInt32 i;
if (aStartAtMin) { // allocate extra space
nscoord availWidth = aAvailWidth;
for (i = 0; i < numConstrainedCols; i++) {
// the weight here is a relative metric for determining when cols reach their max constraint.
// A col with a larger weight will reach its max before one with a smaller value.
nscoord delta = colInfo[i]->mMaxWidth - colInfo[i]->mWidth;
colInfo[i]->mWeight = (delta <= 0)
? 1000000 // cols which have already reached their max get a large value
: ((float)colInfo[i]->mMaxWidth) / ((float)delta);
}
// sort the cols based on the weight so that in one pass cols with higher
// weights will get their max earlier than ones with lower weights
// This is an innefficient bubble sort, but unless there are an unlikely
// large number of cols, it is not an issue.
AC_Sort(colInfo, numConstrainedCols);
// compute the proportion to be added to each column, don't go beyond the col's
// max. This algorithm assumes that the Weight works as stated above
AC_Increase(numConstrainedCols, colInfo, sumMaxConstraints - sumMinConstraints,
availWidth, aPixelToTwips);
}
else { // reduce each col width
nscoord reduceWidth = maxMinDiff - aAvailWidth;
if (reduceWidth < 0) {
NS_ASSERTION(PR_TRUE, "AllocateConstrained called incorrectly");
AC_Wrapup(mTableFrame, numConstrainedCols, colInfo);
return;
}
for (i = 0; i < numConstrainedCols; i++) {
// the weight here is a relative metric for determining when cols reach their min.
// A col with a larger weight will reach its min before one with a smaller value.
nscoord delta = colInfo[i]->mWidth - colInfo[i]->mMinWidth;
colInfo[i]->mWeight = (delta <= 0)
? 1000000 // cols which have already reached their min get a large value
: ((float)colInfo[i]->mWidth) / ((float)delta);
}
// sort the cols based on the Weight
AC_Sort(colInfo, numConstrainedCols);
// compute the proportion to be subtracted from each column, don't go beyond
// the col's min. This algorithm assumes that the Weight works as stated above
AC_Decrease(numConstrainedCols, colInfo, sumMaxConstraints, reduceWidth, aPixelToTwips);
}
AC_Wrapup(mTableFrame, numConstrainedCols, colInfo);
}
#ifdef DEBUG_TABLE_STRATEGY
void BasicTableLayoutStrategy::Dump(PRInt32 aIndent)
{
char* indent = new char[aIndent + 1];
if (!indent) return;
for (PRInt32 i = 0; i < aIndent + 1; i++) {
indent[i] = ' ';
}
indent[aIndent] = 0;
printf("%s**START BASIC STRATEGY DUMP** table=%p cols=%X",
indent, mTableFrame, mCols);
printf("\n%s cellSpacing=%d propRatio=%.2f navQuirks=%d",
indent, mCellSpacingTotal, mMinToDesProportionRatio, mIsNavQuirksMode);
printf(" **END BASIC STRATEGY DUMP** \n");
delete [] indent;
}
#endif