gecko-dev/layout/tables/BasicTableLayoutStrategy.cpp

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C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
#include "BasicTableLayoutStrategy.h"
#include "nsTableFrame.h"
#include "nsTableColFrame.h"
#include "nsTableCellFrame.h"
#include "nsIStyleContext.h"
#include "nsStyleConsts.h"
#include "nsVoidArray.h"
#include "nsHTMLIIDs.h"
static const PRBool gsDebug = PR_FALSE;
const nscoord gBigSpace = 100000; // a fudge constant used when the table is laid out with unconstrained width
// these macros are defined to improve the readability of the main code
#define TDBG_S(str) \
if (gsDebug) { \
printf((str)); \
}
#define TDBG_SP(str,ptr) \
if (gsDebug) { \
printf((str),(ptr)); \
}
#define TDBG_SPD(str,ptr,dec) \
if (gsDebug) { \
printf((str),(ptr),(dec)); \
}
#define TDBG_SPDD(str,ptr,dec1,dec2) \
if (gsDebug) { \
printf((str),(ptr),(dec1),(dec2)); \
}
#define TDBG_SFDD(str,flt,dec1,dec2) \
if (gsDebug) { \
printf((str),(flt),(dec1),(dec2)); \
}
#define TDBG_SDF(str,dec,flt) \
if (gsDebug) { \
printf((str),(dec),(flt)); \
}
#define TDBG_SDFDDD(str,dec1,flt,dec2,dec3,dec4) \
if (gsDebug) { \
printf((str),(dec1),(flt),(dec2),(dec3),(dec4)); \
}
#define TDBG_SD(str,dec) \
if (gsDebug) { \
printf((str),(dec)); \
}
#define TDBG_SDD(str,dec1,dec2) \
if (gsDebug) { \
printf((str),(dec1),(dec2)); \
}
#define TDBG_SDDD(str,dec1,dec2,dec3) \
if (gsDebug) { \
printf((str),(dec1),(dec2),(dec3)); \
}
#define TDBG_SDFD(str,dec1,flt,dec2) \
if (gsDebug) { \
printf((str),(dec1),(flt),(dec2)); \
}
#define TDBG_SDDF(str,dec1,dec2,flt) \
if (gsDebug) { \
printf((str),(dec1),(dec2),(flt)); \
}
#define TDBG_SDDDD(str,dec1,dec2,dec3,dec4) \
if (gsDebug) { \
printf((str),(dec1),(dec2),(dec3),(dec4)); \
}
#define TDBG_SDDDF(str,dec1,dec2,dec3,flt) \
if (gsDebug) { \
printf((str),(dec1),(dec2),(dec3),(flt)); \
}
#define TDBG_SDDDDD(str,dec1,dec2,dec3,dec4,dec5) \
if (gsDebug) { \
printf((str),(dec1),(dec2),(dec3),(dec4),(dec5)); \
}
#define TDBG_SDDDDDD(str,dec1,dec2,dec3,dec4,dec5,dec6) \
if (gsDebug) { \
printf((str),(dec1),(dec2),(dec3),(dec4),(dec5),(dec6)); \
}
#define TDBG_SDD_SDD(str1,dec1a,dec1b,str2,dec2a,dec2b) \
if (gsDebug) { \
printf((str1),(dec1a),(dec1b)); \
printf((str2),(dec2a),(dec2b)); \
}
#define TDBG_SDS_SDD_SD(str1a,dec1,str1b,str2,dec2a,dec2b,str3,dec3) \
if (gsDebug) { \
printf((str1a),(dec1),(str1b)); \
printf((str2),(dec2a),(dec2b)); \
printf((str3),(dec3)); \
}
#define TDBG_SDS_SD(str1a,dec1,str1b,str2,dec2) \
if (gsDebug) { \
printf((str1a),(dec1),(str1b)); \
printf((str2),(dec2)); \
}
#define TDBG_WIDTHS1() \
if (PR_TRUE == gsDebug) { \
printf ("BalanceColumnWidths with aMaxWidth = %d, availWidth = %d\n", aMaxWidth, availWidth); \
printf ("\t\t specifiedTW = %d, min/maxTW = %d %d\n", specifiedTableWidth, mMinTableWidth, mMaxTableWidth); \
printf ("\t\t reflow reason = %d\n", aReflowState.reason); \
}
#define TDBG_WIDTHS2(string) \
if (PR_TRUE == gsDebug) { \
printf("\n%p: %s\n", (string), mTableFrame); \
for (PRInt32 i=0; i<mNumCols; i++) { \
printf(" col %d assigned width %d\n", i, mTableFrame->GetColumnWidth(i)); \
} \
printf("\n"); \
}
#define TDBG_WIDTHS4(string,haveShrinkFit,shrinkFit) \
if (PR_TRUE == gsDebug) { \
nscoord tableWidth = 0; \
printf((string)); \
for (PRInt32 i = 0; i < mNumCols; i++) { \
tableWidth += mTableFrame->GetColumnWidth(i); \
printf(" %d ", mTableFrame->GetColumnWidth(i)); \
} \
printf ("\n computed table width is %d",tableWidth); \
if ((haveShrinkFit)) { \
printf(" with aShrinkFixedCols = %s", shrinkFit ? "TRUE" : "FALSE"); \
} \
printf("\n"); \
}
/* ---------- ProportionalColumnLayoutStruct ---------- */
// TODO: make public so other subclasses can use it
/** useful info about a column for layout of tables with colspans */
struct ProportionalColumnLayoutStruct
{
ProportionalColumnLayoutStruct(PRInt32 aColIndex,
nscoord aMinColWidth,
nscoord aMaxColWidth,
PRInt32 aProportion)
{
mColIndex = aColIndex;
mMinColWidth = aMinColWidth;
mMaxColWidth = aMaxColWidth;
mProportion = aProportion;
};
PRInt32 mColIndex;
nscoord mMinColWidth;
nscoord mMaxColWidth;
PRInt32 mProportion;
};
/* ---------- ColSpanStruct ---------- */
/** useful info about a column for layout of tables with colspans */
struct ColSpanStruct
{
PRInt32 colIndex;
PRInt32 colSpan;
nscoord width;
ColSpanStruct(PRInt32 aSpan, PRInt32 aIndex, nscoord aWidth)
{
colSpan = aSpan;
colIndex = aIndex;
width = aWidth;
}
};
/* ---------- BasicTableLayoutStrategy ---------- */
/* return true if the style indicates that the width is fixed
* for the purposes of column width determination
*/
inline
PRBool BasicTableLayoutStrategy::IsFixedWidth(const nsStylePosition* aStylePosition,
const nsStyleTable* aStyleTable)
{
return PRBool ((eStyleUnit_Coord==aStylePosition->mWidth.GetUnit()) ||
(eStyleUnit_Coord==aStyleTable->mSpanWidth.GetUnit()));
}
BasicTableLayoutStrategy::BasicTableLayoutStrategy(nsTableFrame *aFrame)
{
NS_ASSERTION(nsnull != aFrame, "bad frame arg");
mTableFrame = aFrame;
mMinTableWidth = 0;
mMaxTableWidth = 0;
mFixedTableWidth = 0;
}
BasicTableLayoutStrategy::~BasicTableLayoutStrategy()
{
}
PRBool BasicTableLayoutStrategy::Initialize(nsSize* aMaxElementSize,
PRInt32 aNumCols)
{
#ifdef NS_DEBUG
nsIFrame* tablePIF = nsnull;
mTableFrame->GetPrevInFlow(&tablePIF);
NS_ASSERTION(nsnull == tablePIF, "never ever call me on a continuing frame!");
#endif
PRBool result = PR_TRUE;
// re-init instance variables
mNumCols = aNumCols;
mMinTableWidth = 0;
mMaxTableWidth = 0;
mFixedTableWidth = 0;
mCols = mTableFrame->GetEffectiveCOLSAttribute();
// Step 1 - assign the width of all fixed-width columns
AssignPreliminaryColumnWidths();
// set aMaxElementSize here because we compute mMinTableWidth in AssignPreliminaryColumnWidths
if (nsnull != aMaxElementSize) {
SetMaxElementSize(aMaxElementSize);
}
return result;
}
void BasicTableLayoutStrategy::SetMaxElementSize(nsSize* aMaxElementSize)
{
if (nsnull != aMaxElementSize) {
aMaxElementSize->height = 0;
nsMargin borderPadding;
const nsStylePosition* tablePosition;
const nsStyleSpacing* tableSpacing;
mTableFrame->GetStyleData(eStyleStruct_Position, ((const nsStyleStruct *&)tablePosition));
mTableFrame->GetStyleData(eStyleStruct_Spacing , ((const nsStyleStruct *&)tableSpacing));
mTableFrame->GetTableBorder(borderPadding);
nsMargin padding;
tableSpacing->GetPadding(padding);
borderPadding += padding;
if (tablePosition->mWidth.GetUnit() == eStyleUnit_Coord) {
aMaxElementSize->width = tablePosition->mWidth.GetCoordValue();
aMaxElementSize->width = PR_MAX(aMaxElementSize->width, mMinTableWidth);
//XXX: need to factor in borderpadding here!
}
else {
aMaxElementSize->width = mMinTableWidth + borderPadding.left + borderPadding.right;
}
TDBG_SPD("%p BTLS::Init setting aMaxElementSize->width = %d\n", mTableFrame, aMaxElementSize->width);
}
}
PRBool BasicTableLayoutStrategy::BalanceColumnWidths(nsIStyleContext* aTableStyle,
const nsHTMLReflowState& aReflowState,
nscoord aMaxWidth)
{
#ifdef NS_DEBUG
nsIFrame *tablePIF = nsnull;
mTableFrame->GetPrevInFlow(&tablePIF);
NS_ASSERTION(nsnull==tablePIF, "never ever call me on a continuing frame!");
#endif
PRBool result;
NS_ASSERTION(nsnull != aTableStyle, "bad arg");
if (nsnull==aTableStyle) {
return PR_FALSE;
}
nscoord specifiedTableWidth = 0; // not cached as a data member because it can vary depending on aMaxWidth
PRBool tableIsAutoWidth = nsTableFrame::TableIsAutoWidth(mTableFrame, aTableStyle, aReflowState, specifiedTableWidth);
// HACK! Fix TableIsAutoWidth to return the right width
specifiedTableWidth = PR_MIN(specifiedTableWidth,aMaxWidth);
if (NS_UNCONSTRAINEDSIZE == specifiedTableWidth) {
specifiedTableWidth = 0;
tableIsAutoWidth = PR_TRUE;
}
// Step 2 - determine how much space is really available
nscoord availWidth = aMaxWidth; // start with the max width I've been given
if (NS_UNCONSTRAINEDSIZE != availWidth) { // if that's not infinite, subtract the fixed columns
availWidth -= mFixedTableWidth;
} // that have already been accounted for
if (PR_FALSE == tableIsAutoWidth) { // if the table has a specified width
availWidth = specifiedTableWidth - mFixedTableWidth; // use it, minus the fixed columns already accounted for
}
//if (0!=mMinTableWidth && mMinTableWidth>availWidth) // if the computed available size is too small
//availWidth = mMinTableWidth; // bump it up to the min
availWidth = PR_MAX(0,availWidth); // avail width can never be negative
// Step 3 - assign the width of all proportional-width columns in the remaining space
TDBG_WIDTHS1();
TDBG_WIDTHS2("BEGIN BALANCE COLUMN WIDTHS\n");
result = BalanceProportionalColumns(aReflowState, availWidth, aMaxWidth,
specifiedTableWidth, tableIsAutoWidth);
TDBG_WIDTHS2("END BALANCE COLUMN WIDTHS\n");
#ifdef NS_DEBUG // sanity check for table column widths
for (PRInt32 i=0; i<mNumCols; i++) {
nsTableColFrame *colFrame;
mTableFrame->GetColumnFrame(i, colFrame);
nscoord minColWidth = colFrame->GetMinColWidth();
nscoord assignedColWidth = mTableFrame->GetColumnWidth(i);
NS_ASSERTION(assignedColWidth >= minColWidth, "illegal width assignment");
}
#endif
return result;
}
// Step 1 - assign the width of all fixed-width columns, all other columns get there max,
// and calculate min/max table width
PRBool BasicTableLayoutStrategy::AssignPreliminaryColumnWidths()
{
TDBG_SP("** %p: AssignPreliminaryColumnWidths **\n", mTableFrame);
nsVoidArray *spanList = nsnull;
nsVoidArray *colSpanList = nsnull;
PRBool hasColsAttribute = (PRBool)(NS_STYLE_TABLE_COLS_NONE != mCols);
PRInt32 *minColWidthArray = nsnull; // used for computing the effect of COLS attribute
PRInt32 *maxColWidthArray = nsnull; // used for computing the effect of COLS attribute
if (PR_TRUE == hasColsAttribute) {
minColWidthArray = new PRInt32[mNumCols];
maxColWidthArray = new PRInt32[mNumCols];
}
nscoord cellPadding = mTableFrame->GetCellPadding();
TDBG_SD("table cell padding = %d\n", cellPadding);
PRInt32 numRows = mTableFrame->GetRowCount();
PRInt32 colIndex, rowIndex;
// for every column, determine it's min and max width, and keep track of the table width
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
nscoord minColWidth = 0; // min col width factoring in table attributes
nscoord minColContentWidth = 0; // min width of the col's contents, does not take into account table attributes
nscoord maxColWidth = 0; // max col width factoring in table attributes
nscoord effectiveMinColumnWidth = 0; // min col width ignoring cells with colspans
nscoord effectiveMaxColumnWidth = 0; // max col width ignoring cells with colspans
nscoord specifiedFixedColWidth = 0; // the width of the column if given stylistically (or via cell Width attribute)
// only applicable if haveColWidth==PR_TRUE
PRBool haveColWidth = PR_FALSE; // if true, the column has a width either from HTML width attribute,
// from a style rule on the column,
// or from a width attr/style on a cell that has colspan==1
// Get column information
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex);
TDBG_SDD("BTLS::APCW - got colFrame %p for colIndex %d\n", colFrame, colIndex);
NS_ASSERTION(nsnull != colFrame, "bad col frame");
// Get the columns's style
const nsStylePosition* colPosition;
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
const nsStyleTable* colTableStyle;
colFrame->GetStyleData(eStyleStruct_Table, (const nsStyleStruct*&)colTableStyle);
// Get fixed column width if it has one
if (eStyleUnit_Coord == colPosition->mWidth.GetUnit()) {
haveColWidth = PR_TRUE;
specifiedFixedColWidth = colPosition->mWidth.GetCoordValue();
specifiedFixedColWidth += (cellPadding*2);
TDBG_SD("BTLS::APCW - got specified col width = %d\n", specifiedFixedColWidth);
}
/* Scan the column, simulatneously assigning column widths
* and computing the min/max column widths
*/
PRInt32 firstRowIndex = -1;
PRInt32 maxColSpan = 1;
PRBool cellGrantingWidth = PR_TRUE;
for (rowIndex = 0; rowIndex < numRows; rowIndex++) {
nsTableCellFrame* cellFrame = mTableFrame->GetCellFrameAt(rowIndex, colIndex);
if (nsnull == cellFrame) { // there is no cell in this row that corresponds to this column
continue;
}
if (-1 == firstRowIndex) {
firstRowIndex = rowIndex;
}
PRInt32 cellRowIndex;
cellFrame->GetRowIndex(cellRowIndex);
if (rowIndex != cellRowIndex) {
// For cells that span rows, we only figure it in once
NS_ASSERTION(1 != cellFrame->GetRowSpan(), "row index does not match row span"); // sanity check
continue;
}
PRInt32 colSpan = mTableFrame->GetEffectiveColSpan(colIndex, cellFrame);
maxColSpan = PR_MAX(maxColSpan,colSpan);
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
if (colIndex != cellColIndex) {
// For cells that span cols, we figure in the row using previously-built SpanInfo
NS_ASSERTION(1 != cellFrame->GetColSpan(), "col index does not match col span"); // sanity check
continue;
}
nsSize cellMinSize = cellFrame->GetPass1MaxElementSize();
nsSize cellDesiredSize = cellFrame->GetPass1DesiredSize();
nscoord cellDesiredWidth = cellDesiredSize.width;
nscoord cellMinWidth = cellMinSize.width;
if (1 == colSpan) {
if (0 == minColContentWidth) {
minColContentWidth = cellMinWidth;
}
else {
minColContentWidth = PR_MAX(minColContentWidth, cellMinWidth);
}
}
else {
minColContentWidth = PR_MAX(minColContentWidth, cellMinWidth/colSpan); // no need to divide this proportionately
}
TDBG_SDDDDDD("for cell %d with colspan=%d, min = %d,%d and des = %d,%d\n",
rowIndex, colSpan, cellMinSize.width, cellMinSize.height,
cellDesiredSize.width, cellDesiredSize.height);
if (PR_TRUE == haveColWidth) {
// This col has a specified coord fixed width, so set the min and max width to the larger of
// (specified width, largest max_element_size of the cells in the column)
// factoring in the min width of the prior cells (stored in minColWidth)
nscoord widthForThisCell = specifiedFixedColWidth;
if (0 == specifiedFixedColWidth) { // set to min
specifiedFixedColWidth = cellMinWidth;
}
widthForThisCell = PR_MAX(widthForThisCell, effectiveMinColumnWidth);
if (1 == colSpan) {
widthForThisCell = PR_MAX(widthForThisCell, cellMinWidth);
}
mTableFrame->SetColumnWidth(colIndex, widthForThisCell);
maxColWidth = widthForThisCell;
minColWidth = PR_MAX(minColWidth, cellMinWidth);
if (1 == colSpan) {
effectiveMaxColumnWidth = PR_MAX(effectiveMaxColumnWidth, widthForThisCell);
if (0 == effectiveMinColumnWidth) {
effectiveMinColumnWidth = cellMinWidth;//widthForThisCell;
}
else {
//effectiveMinColumnWidth = PR_MIN(effectiveMinColumnWidth, widthForThisCell);
//above line works for most tables, but it can't be right
effectiveMinColumnWidth = PR_MAX(effectiveMinColumnWidth, cellMinWidth);
//above line seems right and works for xT1, but breaks lots of other tables.
}
}
}
else {
if (maxColWidth < cellDesiredWidth) {
maxColWidth = cellDesiredWidth;
}
if ((1==colSpan) && (effectiveMaxColumnWidth < cellDesiredWidth)) {
effectiveMaxColumnWidth = cellDesiredWidth;
}
if (minColWidth < cellMinWidth) {
minColWidth = cellMinWidth;
}
// effectiveMinColumnWidth is the min width as if no cells with colspans existed
if ((1==colSpan) && (effectiveMinColumnWidth < cellMinWidth)) {
effectiveMinColumnWidth = cellMinWidth;
}
}
if (1 < colSpan) {
// add the column to our list of post-process columns, if all of the intersected columns are auto
PRBool okToAdd = PR_TRUE;
if (numRows == 1 || (PR_FALSE == IsFixedWidth(colPosition, colTableStyle))) {
okToAdd = PR_FALSE;
}
else {
for (PRInt32 i = 1; i < colSpan; i++) {
nsTableColFrame* cf;
mTableFrame->GetColumnFrame(i+colIndex, cf);
const nsStylePosition* colPos;
cf->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPos);
if (colPos->mWidth.GetUnit() != eStyleUnit_Auto &&
(nsTableColFrame::eWIDTH_SOURCE_CELL_WITH_SPAN!=cf->GetWidthSource())) {
okToAdd = PR_FALSE;
break;
}
}
}
nscoord width = cellDesiredSize.width; // used below as the cell's "natural" width
if (eStyleUnit_Coord == colTableStyle->mSpanWidth.GetUnit()) {
width = colSpan * colTableStyle->mSpanWidth.GetCoordValue(); // "colSpan*" because table frame divided per column spanned
}
if (PR_TRUE == okToAdd) {
nscoord colwidth = PR_MAX(width, cellMinWidth);
ColSpanStruct* colSpanInfo = new ColSpanStruct(colSpan, colIndex, colwidth);
if (nsnull == colSpanList) {
colSpanList = new nsVoidArray();
}
colSpanList->AppendElement(colSpanInfo);
}
if (PR_TRUE == cellGrantingWidth) {
// add the cell to our list of spanning cells
SpanInfo* spanInfo = new SpanInfo(colIndex, colSpan, cellMinWidth, width);
if (nsnull == spanList) {
spanList = new nsVoidArray();
}
spanList->AppendElement(spanInfo);
}
}
// bookkeeping: is this the cell that gave the column it's fixed width attribute?
// must be done after "haveColWidth && cellGrantingWidth" used above
// since we want the biggest, I don't think this is valid anymore
// it made sense when the rule was to grab the first cell that contributed a width
//if (PR_TRUE==cellGrantingWidth)
//{
// const nsStylePosition* cellPosition;
// cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)cellPosition);
// if (eStyleUnit_Coord == cellPosition->mWidth.GetUnit())
// cellGrantingWidth=PR_FALSE; //I've found the cell that gave the col it's width
//}
// book 'em, Danno
TDBG_SDDD(" after cell %d, minColWidth = %d and maxColWidth = %d\n",
rowIndex, minColWidth, maxColWidth);
} // end for (rowIndex = 0; rowIndex < numRows; rowIndex++)
// adjust the "fixed" width for content that is too wide
if (effectiveMinColumnWidth > specifiedFixedColWidth) {
specifiedFixedColWidth = effectiveMinColumnWidth;
}
// do all the global bookkeeping, factoring in margins
nscoord colInset = mTableFrame->GetCellSpacingX();
// keep a running total of the amount of space taken up by all fixed-width columns
if ((PR_TRUE == haveColWidth) &&
(nsTableColFrame::eWIDTH_SOURCE_CELL == colFrame->GetWidthSource())) {
mFixedTableWidth += specifiedFixedColWidth + colInset;
if (0 == colIndex) {
mFixedTableWidth += colInset;
}
TDBG_SD("setting mFixedTableWidth=%d\n", mFixedTableWidth);
}
// cache the computed column info
colFrame->SetMinColWidth(effectiveMinColumnWidth);
colFrame->SetMaxColWidth(effectiveMaxColumnWidth);
colFrame->SetEffectiveMinColWidth(effectiveMinColumnWidth);
colFrame->SetEffectiveMaxColWidth(effectiveMaxColumnWidth);
// this is the default, the real adjustment happens below where we deal with colspans
colFrame->SetAdjustedMinColWidth(effectiveMinColumnWidth);
if ((PR_TRUE == haveColWidth) &&
(nsTableColFrame::eWIDTH_SOURCE_CELL_WITH_SPAN!=colFrame->GetWidthSource())) {
mTableFrame->SetColumnWidth(colIndex, specifiedFixedColWidth);
}
else {
mTableFrame->SetColumnWidth(colIndex, effectiveMaxColumnWidth);
}
TDBG_SDD("col %d, set col width to = %d\n", colIndex, mTableFrame->GetColumnWidth(colIndex));
if (PR_TRUE == hasColsAttribute) {
minColWidthArray[colIndex] = minColWidth;
maxColWidthArray[colIndex] = maxColWidth;
}
TDBG_SDDDD("after col %d, minColWidth=%d effectiveMinColumnWidth=%d\n\teffectiveMaxColumnWidth = %d\n",
colIndex, minColWidth, effectiveMinColumnWidth, effectiveMaxColumnWidth);
}
// now, post-process the computed values based on the table attributes
// first, factor in max values of spanning cells proportionately.
// We can't do this above in the first loop, because we don't have enough information
// to determine the proportion each column gets from spanners.
if (nsnull != spanList) {
// we only want to do this if there are auto-cells involved
// or if we have columns that are provisionally fixed-width with colspans
PRInt32 numAutoColumns=0;
PRInt32* autoColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Auto, numAutoColumns, autoColumns);
// for every column, handle spanning cells that impact that column
for (PRInt32 colIndex=0; colIndex<mNumCols; colIndex++) {
TDBG_SD("handling span for %d\n", colIndex);
PRInt32 spanCount = spanList->Count();
// go through the list backwards so we can delete easily
for (PRInt32 spanIndex = spanCount-1; 0 <= spanIndex; spanIndex--) {
// get each spanInfo struct and see if it impacts this column
SpanInfo *spanInfo = (SpanInfo *)(spanList->ElementAt(spanIndex));
// if the spanInfo is about a column before the current column, it effects
// the current column (otherwise it would have already been deleted.)
if (spanInfo->initialColIndex <= colIndex) {
if (-1 == spanInfo->effectiveMaxWidthOfSpannedCols) {
// if we have not yet computed effectiveMaxWidthOfSpannedCols, do it now
// first, initialize the sums
spanInfo->effectiveMaxWidthOfSpannedCols = 0;
spanInfo->effectiveMinWidthOfSpannedCols = 0;
// then compute the sums
for (PRInt32 span=0; span < spanInfo->initialColSpan; span++) {
nsTableColFrame* nextColFrame = mTableFrame->GetColFrame(colIndex+span);
if (nsnull==nextColFrame) {
break;
}
spanInfo->effectiveMaxWidthOfSpannedCols += nextColFrame->GetEffectiveMaxColWidth();
spanInfo->effectiveMinWidthOfSpannedCols += nextColFrame->GetEffectiveMinColWidth();
}
TDBG_SDD("effective min total = %d, max total = %d\n",
spanInfo->effectiveMinWidthOfSpannedCols, spanInfo->effectiveMaxWidthOfSpannedCols);
}
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex);
nscoord colMinWidth = colFrame->GetMinColWidth();
// compute the spanning cell's contribution to the column min width
// this is the "adjusted" column width, used in SetTableToMinWidth
nscoord spanCellMinWidth;
if (0 != spanInfo->effectiveMinWidthOfSpannedCols) {
float percent = ((float)(colFrame->GetEffectiveMinColWidth())) /
((float)(spanInfo->effectiveMinWidthOfSpannedCols));
spanCellMinWidth = NSToCoordRound(((float)(spanInfo->cellMinWidth)) * percent);
TDBG_SDFDDD("spanCellMinWidth portion = %d from percent=%f, cellMW=%d, effMinColW=%d, sum=%d\n",
spanCellMinWidth, percent, spanInfo->cellMinWidth, colFrame->GetEffectiveMinColWidth(),
spanInfo->effectiveMinWidthOfSpannedCols);
if (colMinWidth < spanCellMinWidth) {
colFrame->SetAdjustedMinColWidth(spanCellMinWidth); // set the new min width for the col
}
}
else {
spanCellMinWidth = spanInfo->cellMinWidth / spanInfo->initialColSpan;
if (colMinWidth < spanCellMinWidth) {
colFrame->SetAdjustedMinColWidth(spanCellMinWidth);
}
}
// compute the spanning cell's contribution to the column max width
nscoord colMaxWidth = colFrame->GetMaxColWidth();
nscoord spanCellMaxWidth;
if (0 != spanInfo->effectiveMaxWidthOfSpannedCols) {
float percent = ((float)(colFrame->GetEffectiveMaxColWidth())) /
((float)(spanInfo->effectiveMaxWidthOfSpannedCols));
spanCellMaxWidth = NSToCoordRound(((float)(spanInfo->cellDesiredWidth)) * percent);
TDBG_SDFDDD("spanCellMaxWidth portion = %d with percent = %f from cellDW = %d, effMaxColW=%d and sum=%d\n",
spanCellMaxWidth, percent, spanInfo->cellDesiredWidth, colFrame->GetEffectiveMaxColWidth(),
spanInfo->effectiveMaxWidthOfSpannedCols);
if (colMaxWidth < spanCellMaxWidth) {
// make sure we're at least as big as our min
spanCellMaxWidth = PR_MAX(spanCellMaxWidth, colMinWidth);
colFrame->SetMaxColWidth(spanCellMaxWidth); // set the new max width for the col
mTableFrame->SetColumnWidth(colIndex, spanCellMaxWidth); // set the column to the new desired max width
TDBG_SDDDD("for spanning cell into col %d with remaining span=%d, old max = %d, new max = %d\n",
colIndex, spanInfo->span, colMaxWidth, spanCellMaxWidth);
}
}
else {
spanCellMaxWidth = spanInfo->cellDesiredWidth / spanInfo->initialColSpan;
nscoord minColWidth = colFrame->GetMinColWidth();
spanCellMaxWidth = PR_MAX(spanCellMaxWidth, minColWidth);
colFrame->SetMaxColWidth(spanCellMaxWidth);
mTableFrame->SetColumnWidth(colIndex, spanCellMaxWidth);
TDBG_SDDDD(" for spanning cell into col %d with remaining span=%d, old max = %d, new max = %d\n",
colIndex, spanInfo->span, colMaxWidth, spanCellMaxWidth);
}
spanInfo->span--;
if (0==spanInfo->span) {
spanList->RemoveElementAt(spanIndex);
delete spanInfo;
}
// begin code that respects column width attribute
/* the code below checks to see if the column has a width attribute (either it's own or a cell's)
* if so, if it fits within the constraints we computed above, we use it.
* why go through all that pain above, then? because the given width attribute might not
* be rational. So we need to act as if it doesn't exist and then fit it in if it makes sense.
* a shortcut that checks for a column width attribute and skips the above computations
* would not work without lots of extra computation that would lead you down the same path anyway.
*/
const nsStylePosition* colPosition;
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
// Get fixed column width if it has one
if (eStyleUnit_Coord == colPosition->mWidth.GetUnit()) {
if (nsTableColFrame::eWIDTH_SOURCE_CELL_WITH_SPAN!=colFrame->GetWidthSource()) {
nscoord specifiedFixedColWidth = colPosition->mWidth.GetCoordValue();
specifiedFixedColWidth += (cellPadding*2);
if (specifiedFixedColWidth>=colFrame->GetEffectiveMinColWidth()) {
mTableFrame->SetColumnWidth(colIndex, specifiedFixedColWidth);
colFrame->SetMaxColWidth(specifiedFixedColWidth);
}
}
}
// end code that respects column width attribute
}
}
}
}
// now set the min and max table widths
SetMinAndMaxTableWidths();
// then, handle the COLS attribute (equal column widths)
// if there is a COLS attribute, fix up mMinTableWidth and mMaxTableWidth
if (PR_TRUE == hasColsAttribute) {
TDBG_SD("has COLS attribute = %d\n", mCols);
// for every effected column, subtract out its prior contribution and add back in the new value
PRInt32 numColsEffected = mNumCols;
if (NS_STYLE_TABLE_COLS_ALL != mCols) {
numColsEffected = mCols;
}
PRInt32 maxOfMinColWidths = 0;
PRInt32 maxOfMaxColWidths = 0;
PRInt32 effectedColIndex;
for (effectedColIndex=0; effectedColIndex<numColsEffected; effectedColIndex++) {
maxOfMinColWidths = PR_MAX(maxOfMinColWidths, minColWidthArray[effectedColIndex]);
maxOfMaxColWidths = PR_MAX(maxOfMaxColWidths, maxColWidthArray[effectedColIndex]);
}
for (effectedColIndex = 0; effectedColIndex<numColsEffected; effectedColIndex++) {
// subtract out the prior contributions of this column
// and add back in the adjusted value
if (NS_UNCONSTRAINEDSIZE != mMinTableWidth) {
mMinTableWidth -= minColWidthArray[effectedColIndex];
mMinTableWidth += maxOfMinColWidths;
}
if (NS_UNCONSTRAINEDSIZE!=mMaxTableWidth) {
mMaxTableWidth -= maxColWidthArray[effectedColIndex];
mMaxTableWidth += maxOfMaxColWidths;
}
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(effectedColIndex, colFrame);
colFrame->SetMaxColWidth(maxOfMaxColWidths); // cache the new column max width (min width is uneffected)
colFrame->SetEffectiveMaxColWidth(maxOfMaxColWidths);
TDBG_SDD("col %d now has max col width %d\n", effectedColIndex, maxOfMaxColWidths);
}
delete [] minColWidthArray;
delete [] maxColWidthArray;
}
if (nsnull != colSpanList) {
DistributeFixedSpace(colSpanList);
}
TDBG_SPDD("%p: aMinTW=%d, aMaxTW=%d\n", mTableFrame, mMinTableWidth, mMaxTableWidth);
// clean up
if (nsnull != spanList) {
TDBG_S("BTLS::APCW...space leak, span list not empty\n");
delete spanList;
}
if (nsnull != colSpanList) {
PRInt32 colSpanListCount = colSpanList->Count();
for (PRInt32 i = 0; i < colSpanListCount; i++) {
ColSpanStruct * colSpanInfo = (ColSpanStruct *)(colSpanList->ElementAt(i));
if (nsnull != colSpanInfo) {
delete colSpanInfo;
}
}
delete colSpanList;
}
return PR_TRUE;
}
void BasicTableLayoutStrategy::SetMinAndMaxTableWidths()
{
TDBG_S("SetMinAndMaxTableWidths\n");
PRInt32 colIndex, rowIndex;
PRInt32 numRows = mTableFrame->GetRowCount();
nscoord colInset = mTableFrame->GetCellSpacingX();
for (rowIndex = 0; rowIndex < numRows; rowIndex++) {
TDBG_SD(" row %d\n", rowIndex);
nscoord rowMinWidth = colInset;
nscoord rowMaxWidth = colInset;
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
TDBG_SD(" col %d\n", colIndex);
nsTableCellFrame* cellFrame = mTableFrame->GetCellFrameAt(rowIndex, colIndex);
rowMinWidth += colInset;
rowMaxWidth += colInset;
if (nsnull == cellFrame) { // there is no cell in this row that corresponds to this column
TDBG_SD(" col %d skipped because there is no cell\n", colIndex);
continue;
}
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
if (colIndex != cellColIndex) {
// For cells that span cols, we figured in the cell the first time we saw it
TDBG_SD(" col %d skipped because it has colspan so we've already added it in\n", colIndex);
continue;
}
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex);
nsSize cellMinSize = cellFrame->GetPass1MaxElementSize();
nscoord cellMinWidth = PR_MAX(cellMinSize.width, colFrame->GetEffectiveMinColWidth());
nsSize cellMaxSize = cellFrame->GetPass1DesiredSize();
nscoord cellMaxWidth = PR_MAX(cellMaxSize.width, colFrame->GetEffectiveMaxColWidth());
PRInt32 colSpan = mTableFrame->GetEffectiveColSpan(colIndex, cellFrame);
nscoord spanningCellMinWidth = (colSpan-1)*colInset;
TDBG_SDDD(" cellMin=%d, cellMax=%d, spanningCellMin=%d\n",
cellMinWidth, cellMaxWidth, spanningCellMinWidth);
// spanning cells must be at least as wide as the columns they span, including the cell spacing spanned.
if (NS_UNCONSTRAINEDSIZE != rowMinWidth) {
rowMinWidth += PR_MAX(cellMinWidth, spanningCellMinWidth);
}
if (NS_UNCONSTRAINEDSIZE != rowMaxWidth) {
rowMaxWidth += PR_MAX(cellMaxWidth, spanningCellMinWidth);
}
TDBG_SDD(" rowMinWidth=%d, rowMaxWidth=%d\n", rowMinWidth, rowMaxWidth);
}
TDBG_SDD(" rowMinWidth=%d, rowMaxWidth=%d\n", rowMinWidth, rowMaxWidth);
// the largest row widths are the table widths
mMinTableWidth = PR_MAX(mMinTableWidth, rowMinWidth);
mMaxTableWidth = PR_MAX(mMaxTableWidth, rowMaxWidth);
TDBG_SDD(" mMinTableWidth=%d, mMaxTableWidth=%d\n", mMinTableWidth, mMaxTableWidth);
}
// verify max of min row widths vs. sum of adjusted column min widths. bigger one wins
nscoord sumOfAdjustedColMinWidths = colInset;
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(colIndex, colFrame);
sumOfAdjustedColMinWidths += colFrame->GetAdjustedMinColWidth() + colInset;
TDBG_SDDDD(" col %d has amcw=%d, cellspacing=%d, sum=%d\n",
colIndex, colFrame->GetAdjustedMinColWidth(), colInset, sumOfAdjustedColMinWidths);
}
TDBG_SD(" sumOfAdjustedColMinWidths=%d\n", sumOfAdjustedColMinWidths);
/*
mMinTableWidth = PR_MAX(mMinTableWidth, sumOfAdjustedColMinWidths);
mMaxTableWidth = PR_MAX(mMinTableWidth, mMaxTableWidth);
*/
TDBG_SDDD("end SetMinAndMaxTW: minTW=%d, maxTW=%d with DMCW=%d\n", mMinTableWidth, mMaxTableWidth, sumOfAdjustedColMinWidths);
}
// take the fixed space spanned by the columns in aColSpanList
// and distribute it proportionately (based on desired width)
void BasicTableLayoutStrategy::DistributeFixedSpace(nsVoidArray *aColSpanList)
{
nscoord excess = 0;
TDBG_S("** DistributeFixedSpace:\n");
// for all fixed-width columns, determine the amount of the specified width each column spanned recieves
PRInt32 numSpanningCells = aColSpanList->Count();
for (PRInt32 nextSpanningCell = 0; nextSpanningCell < numSpanningCells; nextSpanningCell++) { // proportionately distributed extra space, based on the column's fixed width
ColSpanStruct* colInfo = (ColSpanStruct *)aColSpanList->ElementAt(nextSpanningCell);
PRInt32 colIndex = colInfo->colIndex;
PRInt32 colSpan = colInfo->colSpan;
nscoord totalColWidth = colInfo->width;
// 1. get the sum of the effective widths of the columns in the span
nscoord totalEffectiveWidth=0;
nsTableColFrame* colFrame;
PRInt32 i;
for (i = 0; i<colSpan; i++) {
mTableFrame->GetColumnFrame(colIndex+i, colFrame);
totalEffectiveWidth += colFrame->GetColWidthForComputation();
}
// 2. next, compute the proportion to be added to each column, and add it
for (i = 0; i<colSpan; i++) {
mTableFrame->GetColumnFrame(colIndex+i, colFrame);
float percent;
percent = ((float)(colFrame->GetColWidthForComputation())) / ((float)totalEffectiveWidth);
nscoord newColWidth = NSToCoordRound(((float)totalColWidth)*percent);
nscoord minColWidth = colFrame->GetEffectiveMinColWidth();
nscoord oldColWidth = mTableFrame->GetColumnWidth(colIndex+i);
if (newColWidth > minColWidth) {
TDBG_SDD_SDD(" assigning fixed col width for spanning cells: column %d set to %d\n",
colIndex+i, newColWidth,
" minCW = %d oldCW = %d\n", minColWidth, oldColWidth);
mTableFrame->SetColumnWidth(colIndex+i, newColWidth);
colFrame->SetEffectiveMaxColWidth(newColWidth);
}
}
}
}
/* assign column widths to all non-fixed-width columns (adjusting fixed-width columns if absolutely necessary)
aAvailWidth is the amount of space left in the table to distribute after fixed-width columns are accounted for
aMaxWidth is the space the parent gave us (minus border & padding) to fit ourselves into
aTableIsAutoWidth is true if the table is auto-width, false if it is anything else (percent, fixed, etc)
*/
PRBool BasicTableLayoutStrategy::
BalanceProportionalColumns (const nsHTMLReflowState& aReflowState,
nscoord aAvailWidth,
nscoord aMaxWidth,
nscoord aTableSpecifiedWidth,
PRBool aTableIsAutoWidth)
{
PRBool result = PR_TRUE;
nscoord actualMaxWidth; // the real target width, depends on if we're auto or specified width
if (PR_TRUE == aTableIsAutoWidth) {
actualMaxWidth = aMaxWidth;
} else {
actualMaxWidth = PR_MIN(aMaxWidth, aTableSpecifiedWidth);
}
if (NS_UNCONSTRAINEDSIZE == aMaxWidth || NS_UNCONSTRAINEDSIZE == mMinTableWidth) {
// the max width of the table fits comfortably in the available space
TDBG_S(" * table laying out in NS_UNCONSTRAINEDSIZE, calling BalanceColumnsTableFits\n");
// nested tables are laid out with unconstrained width. But the underlying algorithms require a
// real width. So we pick a really big width here. It doesn't really matter, of course, because
// eventually the table will be laid out with a constrained width.
nscoord bigSpace = gBigSpace;
bigSpace = PR_MAX(bigSpace, mMaxTableWidth);
result = BalanceColumnsTableFits(aReflowState, bigSpace, bigSpace,
aTableSpecifiedWidth, aTableIsAutoWidth);
}
else if (mMinTableWidth > actualMaxWidth) {
// the table doesn't fit in the available space
TDBG_S(" * table minTW does not fit, calling BalanceColumnsTableDoesNotFit\n");
result = BalanceColumnsTableDoesNotFit();
}
else if (mMaxTableWidth <= actualMaxWidth) {
// the max width of the table fits comfortably in the available space
TDBG_S(" * table desired size fits, calling BalanceColumnsTableFits\n");
result = BalanceColumnsTableFits(aReflowState, aAvailWidth, aMaxWidth,
aTableSpecifiedWidth, aTableIsAutoWidth);
}
else {
// the table fits somewhere between its min and desired size
TDBG_S(" * table desired size does not fit, calling BalanceColumnsConstrained\n");
result = BalanceColumnsConstrained(aReflowState, aAvailWidth,
actualMaxWidth, aTableIsAutoWidth);
}
return result;
}
// the table doesn't fit, so squeeze every column down to its minimum
PRBool BasicTableLayoutStrategy::BalanceColumnsTableDoesNotFit()
{
PRBool result = PR_TRUE;
PRBool hasColsAttribute = (PRBool)(NS_STYLE_TABLE_COLS_NONE!=mCols);
PRInt32* minColWidthArray = nsnull;
if (PR_TRUE == hasColsAttribute) {
minColWidthArray = new PRInt32[mNumCols];
}
PRInt32 numRows = mTableFrame->GetRowCount();
for (PRInt32 colIndex = 0; colIndex < mNumCols; colIndex++) {
nscoord minAdjustedColWidth = 0;
TDBG_SD(" for col %d\n", colIndex);
nsTableColFrame *colFrame = mTableFrame->GetColFrame(colIndex);
NS_ASSERTION(nsnull != colFrame, "bad col frame");
// Get the columns's style
const nsStylePosition* colPosition;
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
const nsStyleTable* colTableStyle;
colFrame->GetStyleData(eStyleStruct_Table, (const nsStyleStruct*&)colTableStyle);
//if (PR_FALSE==IsFixedWidth(colPosition, colTableStyle))
{
minAdjustedColWidth = colFrame->GetAdjustedMinColWidth();
mTableFrame->SetColumnWidth(colIndex, minAdjustedColWidth);
if (PR_TRUE == hasColsAttribute) {
minColWidthArray[colIndex] = minAdjustedColWidth;
}
}
TDBG_SDD(" 2: col %d, set to width = %d\n", colIndex, mTableFrame->GetColumnWidth(colIndex));
}
// now, post-process the computed values based on the table attributes
// if there is a COLS attribute, fix up mMinTableWidth and mMaxTableWidth
if (PR_TRUE == hasColsAttribute) { // for every effected column, subtract out its prior contribution and add back in the new value
PRInt32 numColsEffected = mNumCols;
if (NS_STYLE_TABLE_COLS_ALL != mCols) {
numColsEffected = mCols;
}
nscoord maxOfEffectedColWidths = 0;
PRInt32 effectedColIndex;
// XXX need to fix this and all similar code if any fixed-width columns intersect COLS
for (effectedColIndex = 0; effectedColIndex < numColsEffected; effectedColIndex++) {
maxOfEffectedColWidths = PR_MAX(maxOfEffectedColWidths, minColWidthArray[effectedColIndex]);
}
for (effectedColIndex = 0; effectedColIndex < numColsEffected; effectedColIndex++) {
// set each effected column to the size of the largest column in the group
mTableFrame->SetColumnWidth(effectedColIndex, maxOfEffectedColWidths);
TDBG_SDD(" 2 (cols): setting %d to %d\n", effectedColIndex, maxOfEffectedColWidths);
}
// we're guaranteed here that minColWidthArray has been allocated, and that
// if we don't get here, it was never allocated
delete [] minColWidthArray;
}
return result;
}
/* the table fits in the given space. Set all columns to their desired width,
* and if we are not an auto-width table add extra space to fluff out the total width
*/
PRBool BasicTableLayoutStrategy::
BalanceColumnsTableFits(const nsHTMLReflowState& aReflowState,
nscoord aAvailWidth,
nscoord aMaxWidth,
nscoord aTableSpecifiedWidth,
PRBool aTableIsAutoWidth)
{
PRBool result = PR_TRUE;
nscoord tableWidth = 0; // the width of the table as a result of setting column widths
nscoord widthOfFixedTableColumns = 0; // the sum of the width of all fixed-width columns plus margins
// tableWidth - widthOfFixedTableColumns is the width of columns computed in this method
PRInt32 totalSlices = 0; // the total number of slices the proportional-width columns request
nsVoidArray* proportionalColumnsList = nsnull; // a list of the columns that are proportional-width
nsVoidArray* spanList = nsnull; // a list of the cells that span columns
PRInt32 numRows = mTableFrame->GetRowCount();
nscoord colInset = mTableFrame->GetCellSpacingX();
PRInt32 colIndex;
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
TDBG_SD("for col %d\n", colIndex);
// Get column information
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex);
NS_ASSERTION(nsnull != colFrame, "bad col frame");
PRInt32 minColWidth = colFrame->GetMinColWidth();
PRInt32 maxColWidth = 0;
PRInt32 rowIndex;
PRInt32 firstRowIndex = -1;
const nsStylePosition* colPosition;
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
const nsStyleTable* colTableStyle;
colFrame->GetStyleData(eStyleStruct_Table, (const nsStyleStruct*&)colTableStyle);
// first, deal with any cells that span into this column from a pervious column
// go through the list backwards so we can delete easily
if (nsnull!=spanList) {
PRInt32 spanCount = spanList->Count();
// go through the list backwards so we can delete easily
for (PRInt32 spanIndex = spanCount-1; 0 <= spanIndex; spanIndex--) {
SpanInfo* spanInfo = (SpanInfo *)(spanList->ElementAt(spanIndex));
if (PR_FALSE == IsFixedWidth(colPosition, colTableStyle)) {
// compute the spanning cell's contribution to the column min width
nscoord spanCellMinWidth;
PRBool needsExtraMinWidth = PR_FALSE;
//if (spanInfo->effectiveMinWidthOfSpannedCols<spanInfo->cellMinWidth)
// needsExtraMinWidth = PR_TRUE;
if (PR_TRUE == needsExtraMinWidth) {
if (0 != spanInfo->effectiveMinWidthOfSpannedCols) {
spanCellMinWidth = (spanInfo->cellMinWidth * colFrame->GetEffectiveMinColWidth()) /
(spanInfo->effectiveMinWidthOfSpannedCols);
TDBG_SDD(" spanlist min: %d of %d\n", spanCellMinWidth, spanInfo->effectiveMaxWidthOfSpannedCols);
if (minColWidth < spanCellMinWidth) {
minColWidth = spanCellMinWidth; // set the new min width for the col
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new min = %d\n",
colIndex, spanInfo->span, minColWidth);
// if the new min width is greater than the desired width, bump up the desired width
maxColWidth = PR_MAX(maxColWidth, minColWidth);
TDBG_SD(" and maxColWidth = %d\n", maxColWidth);
}
}
else {
spanCellMinWidth = spanInfo->cellMinWidth / spanInfo->initialColSpan;
if (minColWidth < spanCellMinWidth) {
minColWidth = spanCellMinWidth;
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new min = %d\n",
colIndex, spanInfo->span, minColWidth);
// if the new min width is greater than the desired width, bump up the desired width
maxColWidth = PR_MAX(maxColWidth, minColWidth);
TDBG_SD(" and maxColWidth = %d\n", maxColWidth);
}
}
}
// compute the spanning cell's contribution to the column max width
nscoord spanCellMaxWidth;
if (0 != spanInfo->effectiveMaxWidthOfSpannedCols) {
spanCellMaxWidth = (spanInfo->cellDesiredWidth * colFrame->GetEffectiveMaxColWidth()) /
(spanInfo->effectiveMaxWidthOfSpannedCols);
TDBG_SDD(" spanlist max: %d of %d\n", spanCellMaxWidth, spanInfo->effectiveMaxWidthOfSpannedCols);
if (maxColWidth < spanCellMaxWidth) {
spanCellMaxWidth = PR_MAX(spanCellMaxWidth, minColWidth);
maxColWidth = spanCellMaxWidth; // set the new max width for the col
mTableFrame->SetColumnWidth(colIndex, spanCellMaxWidth); // set the column to the new desired max width
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new max = %d\n",
colIndex, spanInfo->span, maxColWidth);
}
}
else {
spanCellMaxWidth = spanInfo->cellDesiredWidth / spanInfo->initialColSpan;
maxColWidth = spanCellMaxWidth;
mTableFrame->SetColumnWidth(colIndex, spanCellMaxWidth);
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new max = %d\n",
colIndex, spanInfo->span, maxColWidth);
}
}
spanInfo->span--;
if (0 == spanInfo->span) {
spanList->RemoveElementAt(spanIndex);
delete spanInfo;
}
}
}
// second, process non-fixed-width columns
if (PR_FALSE==IsFixedWidth(colPosition, colTableStyle)) {
for (rowIndex = 0; rowIndex < numRows; rowIndex++) {
// this col has proportional width, so determine its width requirements
nsTableCellFrame* cellFrame = mTableFrame->GetCellFrameAt(rowIndex, colIndex);
if (nsnull == cellFrame) {
// there is no cell in this row that corresponds to this column
continue;
}
if (-1 == firstRowIndex) {
firstRowIndex = rowIndex;
}
PRInt32 cellRowIndex;
cellFrame->GetRowIndex(cellRowIndex);
if (rowIndex != cellRowIndex) {
// For cells that span rows, we only figure it in once
NS_ASSERTION(1 != cellFrame->GetRowSpan(), "row index does not match row span"); // sanity check
continue;
}
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
if (colIndex != cellColIndex) {
// For cells that span cols, we figure in the row using previously-built SpanInfo
NS_ASSERTION(1 != cellFrame->GetColSpan(), "col index does not match row span"); // sanity check
continue;
}
PRInt32 colSpan = mTableFrame->GetEffectiveColSpan(colIndex, cellFrame);
nsSize cellMinSize = cellFrame->GetPass1MaxElementSize();
nsSize cellDesiredSize = cellFrame->GetPass1DesiredSize();
nscoord cellMinWidth=colFrame->GetMinColWidth();
nscoord cellDesiredWidth=colFrame->GetMaxColWidth();
// then get the desired size info factoring in the cell style attributes
if (1 == colSpan) {
cellMinWidth = cellMinSize.width;
cellDesiredWidth = cellDesiredSize.width;
nscoord specifiedCellWidth = -1;
const nsStylePosition* cellPosition;
cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)cellPosition);
if (eStyleUnit_Percent==cellPosition->mWidth.GetUnit()) {
if (PR_FALSE == aTableIsAutoWidth) {
float percent = cellPosition->mWidth.GetPercentValue();
specifiedCellWidth = (PRInt32)(aTableSpecifiedWidth * percent);
TDBG_SFDD("specified percent width %f of %d = %d\n",
percent, aTableSpecifiedWidth, specifiedCellWidth);
}
// otherwise we need to post-process, set to max for now
// do we want to set specifiedCellWidth off of aAvailWidth? aMaxWidth? XXX
}
if (-1 != specifiedCellWidth) {
if (specifiedCellWidth>cellMinWidth) {
TDBG_SDD("setting cellDesiredWidth from %d to %d\n", cellDesiredWidth, specifiedCellWidth);
cellDesiredWidth = specifiedCellWidth;
}
}
}
else {
// colSpan>1, get the proportion for this column
// then get the desired size info factoring in the cell style attributes
nscoord effectiveMaxWidthOfSpannedCols = colFrame->GetEffectiveMaxColWidth();
nscoord effectiveMinWidthOfSpannedCols = colFrame->GetEffectiveMinColWidth();
for (PRInt32 span = 1; span < colSpan; span++) {
nsTableColFrame* nextColFrame = mTableFrame->GetColFrame(colIndex+span);
if (nsnull == nextColFrame) {
break;
}
effectiveMaxWidthOfSpannedCols += nextColFrame->GetEffectiveMaxColWidth();
effectiveMinWidthOfSpannedCols += nextColFrame->GetEffectiveMinColWidth();
}
nscoord specifiedCellWidth = -1;
const nsStylePosition* cellPosition;
cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)cellPosition);
if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) {
//XXX what if table is auto width?
float percent = cellPosition->mWidth.GetPercentValue();
specifiedCellWidth = (PRInt32)(aTableSpecifiedWidth*percent);
TDBG_SFDD("specified percent width %f of %d = %d\n",
percent, aTableSpecifiedWidth, specifiedCellWidth);
}
if (-1 != specifiedCellWidth) {
float percentForThisCol = (float)(cellDesiredSize.width * colFrame->GetEffectiveMaxColWidth()) /
(float)effectiveMaxWidthOfSpannedCols;
nscoord cellWidthForThisCol = (nscoord)(specifiedCellWidth * percentForThisCol);
if (cellWidthForThisCol>cellMinWidth) {
TDBG_SDD("setting cellDesiredWidth from %d to %d\n", cellDesiredWidth, cellWidthForThisCol);
cellDesiredWidth = cellWidthForThisCol;
}
}
// otherwise it's already been factored in.
// now, if this column holds the cell, create a spanInfo struct for the cell
// so subsequent columns can take a proportion of this cell's space into account
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
if (cellColIndex == colIndex) {
// add this cell to span list iff we are currently processing the column the cell starts in
SpanInfo* spanInfo = new SpanInfo(colIndex, colSpan-1, cellMinSize.width, cellDesiredSize.width);
spanInfo->effectiveMaxWidthOfSpannedCols = effectiveMaxWidthOfSpannedCols;
spanInfo->effectiveMinWidthOfSpannedCols = effectiveMinWidthOfSpannedCols;
if (nsnull == spanList) {
spanList = new nsVoidArray();
}
spanList->AppendElement(spanInfo);
}
}
TDBG_SDDDD("factoring in cell %d with colSpan=%d\n factoring in min=%d and desired=%d\n",
rowIndex, colSpan, cellMinWidth, cellDesiredWidth);
maxColWidth = PR_MAX(maxColWidth, cellDesiredWidth);
TDBG_SDDDDD(" after cell %d, minColWidth=%d maxColWidth=%d effColWidth[%d]=%d\n",
rowIndex, minColWidth, maxColWidth,
colIndex, colFrame->GetEffectiveMaxColWidth());
} // end looping through cells in the column
TDBG_SDS_SDD_SD(" for determining width of col %d %s:\n",
colIndex, !IsFixedWidth(colPosition, colTableStyle)? "(P)":"(A)",
" minColWidth = %d and maxColWidth = %d\n", minColWidth, maxColWidth,
" aAvailWidth = %d\n", aAvailWidth);
// Get column width if it has one
nscoord specifiedProportionColumnWidth = -1;
float specifiedPercentageColWidth = -1.0f;
nscoord specifiedFixedColumnWidth = -1;
PRBool isAutoWidth = PR_FALSE;
switch (colPosition->mWidth.GetUnit()) {
case eStyleUnit_Percent:
specifiedPercentageColWidth = colPosition->mWidth.GetPercentValue();
TDBG_SDF("column %d has specified percent width = %f\n", colIndex, specifiedPercentageColWidth);
break;
case eStyleUnit_Proportional:
specifiedProportionColumnWidth = colPosition->mWidth.GetIntValue();
TDBG_SDD("column %d has specified percent width = %d\n", colIndex, specifiedProportionColumnWidth);
break;
case eStyleUnit_Auto:
isAutoWidth = PR_TRUE;
break;
default:
break;
}
// set the column width, knowing that the table fits in the available space
if (0 == specifiedProportionColumnWidth || 0.0==specifiedPercentageColWidth) {
// col width is specified to be the minimum
mTableFrame->SetColumnWidth(colIndex, minColWidth);
TDBG_SDD(" 3 min: col %d set to min width = %d because style set proportionalWidth=0\n",
colIndex, mTableFrame->GetColumnWidth(colIndex));
}
else if ((PR_TRUE == isAutoWidth) ||
((PR_TRUE==aTableIsAutoWidth) && (-1==specifiedProportionColumnWidth))) {
// col width is determined by the cells' content,
// so give each remaining column it's desired width (because we know we fit.)
// if there is width left over, we'll factor that in after this loop is complete
// the OR clause is because we fix up percentage widths as a post-process
// in auto-width tables
mTableFrame->SetColumnWidth(colIndex, maxColWidth);
TDBG_SDDD(" 3 auto: col %d with availWidth %d, set to width = %d\n",
colIndex, aAvailWidth, mTableFrame->GetColumnWidth(colIndex));
}
else if (-1 != specifiedProportionColumnWidth)
{ // we need to save these and do them after all other columns have been calculated
// the calculation will be:
// sum up n, the total number of slices for the columns with proportional width
// compute the table "required" width, fixed-width + percentage-width +
// the sum of the proportional column's max widths (especially because in this routine I know the table fits)
// compute the remaining width: the required width - the used width (fixed + percentage)
// compute the width per slice
// set the width of each proportional-width column to it's number of slices * width per slice
mTableFrame->SetColumnWidth(colIndex, 0); // set the column width to 0, since it isn't computed yet
if (nsnull == proportionalColumnsList) {
proportionalColumnsList = new nsVoidArray();
}
ProportionalColumnLayoutStruct* info =
new ProportionalColumnLayoutStruct(colIndex, minColWidth,
maxColWidth, specifiedProportionColumnWidth);
proportionalColumnsList->AppendElement(info);
totalSlices += specifiedProportionColumnWidth; // keep track of the total number of proportions
TDBG_SDDDD(" 3 proportional: col %d with availWidth %d, gets %d slices with %d slices so far.\n",
colIndex, aAvailWidth, specifiedProportionColumnWidth, totalSlices);
}
else { // give the column a percentage of the remaining space
PRInt32 percentage = -1;
if (NS_UNCONSTRAINEDSIZE == aAvailWidth) {
// since the "remaining space" is infinite, give the column it's max requested size
mTableFrame->SetColumnWidth(colIndex, maxColWidth);
}
else {
if (-1.0f != specifiedPercentageColWidth) {
percentage = (PRInt32)(specifiedPercentageColWidth * 100.0f); // TODO: rounding errors?
// base the % on the total specified fixed width of the table
mTableFrame->SetColumnWidth(colIndex, (percentage*aTableSpecifiedWidth) / 100);
TDBG_SDDDD(" 3 percent specified: col %d given %d percent of aTableSpecifiedWidth %d, set to width = %d\n",
colIndex, percentage, aTableSpecifiedWidth, mTableFrame->GetColumnWidth(colIndex));
}
if (-1 == percentage) {
percentage = 100 / mNumCols;
// base the % on the remaining available width
mTableFrame->SetColumnWidth(colIndex, (percentage*aAvailWidth) / 100);
TDBG_SDDDD(" 3 percent default: col %d given %d percent of aAvailWidth %d, set to width = %d\n",
colIndex, percentage, aAvailWidth, mTableFrame->GetColumnWidth(colIndex));
}
// if the column was computed to be too small, enlarge the column
if (mTableFrame->GetColumnWidth(colIndex) <= minColWidth) {
mTableFrame->SetColumnWidth(colIndex, minColWidth);
TDBG_SD(" enlarging column to it's minimum = %d\n", minColWidth);
}
}
}
}
else { // need to maintain this so we know how much we have left over at the end
nscoord maxEffectiveColWidth = colFrame->GetEffectiveMaxColWidth();
mTableFrame->SetColumnWidth(colIndex, maxEffectiveColWidth);
widthOfFixedTableColumns += maxEffectiveColWidth + colInset;
}
tableWidth += mTableFrame->GetColumnWidth(colIndex) + colInset;
}
tableWidth += colInset;
/* --- post-process if necessary --- */
// XXX the following implementation does not account for borders, cell spacing, cell padding
// first, assign column widths in auto-width tables
PRInt32 numPercentColumns = 0;
PRInt32* percentColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Percent, numPercentColumns, percentColumns);
if ((PR_TRUE == aTableIsAutoWidth) && (0 != numPercentColumns)) {
// variables common to lots of code in this block
nscoord colWidth;
float percent;
const nsStylePosition* colPosition;
nsTableColFrame* colFrame;
if (numPercentColumns != mNumCols) {
TDBG_S("assigning widths to percent colums in auto-width table\n");
nscoord widthOfPercentCells = 0; // the total width of those percent-width cells that have been given a width
nscoord widthOfOtherCells = 0; // the total width of those non-percent-width cells that have been given a width
float sumOfPercentColumns = 0.0f; // the total of the percent widths
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
// every column contributes to either widthOfOtherCells or widthOfPercentCells, but not both
if (PR_TRUE == IsColumnInList(colIndex, percentColumns, numPercentColumns)) {
colFrame = mTableFrame->GetColFrame(colIndex);
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
percent = colPosition->mWidth.GetPercentValue(); // we know this will work
sumOfPercentColumns += percent;
if (sumOfPercentColumns > 1.0f) { // values greater than 100% are meaningless
sumOfPercentColumns = 1.0f;
}
widthOfPercentCells += mTableFrame->GetColumnWidth(colIndex);
}
else {
widthOfOtherCells += mTableFrame->GetColumnWidth(colIndex);
}
}
if (0 == widthOfOtherCells) {
widthOfOtherCells = aMaxWidth;
}
TDBG_SDDF(" widthOfOtherCells=%d widthOfPercentCells = %d sumOfPercentColumns=%f\n",
widthOfOtherCells, widthOfPercentCells, sumOfPercentColumns);
float remainingPercent = 1.0f - sumOfPercentColumns;
nscoord newTableWidth; // the table width after all cells have been resized
if (1.0f == sumOfPercentColumns) { // this definately seems like a QUIRK!
newTableWidth = aMaxWidth;
}
else { // the newTableWidth is the larger of the calculation from the percent cells and non-percent cells
nscoord percentWidth = (nscoord)((1.0f/sumOfPercentColumns)*((float)(widthOfPercentCells)));
nscoord otherWidth = (nscoord)((1.0f/remainingPercent)*((float)(widthOfOtherCells)));
TDBG_SDD(" percentWidth=%d otherWidth=%d\n", percentWidth, otherWidth);
newTableWidth = PR_MAX(percentWidth, otherWidth); // the table width is the larger of the two computations
newTableWidth = PR_MIN(newTableWidth, aMaxWidth); // an auto-width table can't normally be wider than it's parent
newTableWidth = PR_MIN(newTableWidth, mMaxTableWidth);// an auto-width table can't normally be wider than it's own computed max width
}
nscoord excess = newTableWidth-mFixedTableWidth; // the amount of new space that needs to be
// accounted for in the non-fixed columns
TDBG_SD(" newTableWidth=%d \n", newTableWidth);
PRInt32 i; // just a counter
for (i = 0; i < numPercentColumns; i++) {
colIndex = percentColumns[i];
colFrame = mTableFrame->GetColFrame(colIndex);
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
percent = colPosition->mWidth.GetPercentValue(); // we know this will work
colWidth = (nscoord)((percent) * ((float)newTableWidth));
nscoord minColWidth = colFrame->GetEffectiveMinColWidth();
colWidth = PR_MAX(colWidth, minColWidth);
mTableFrame->SetColumnWidth(colIndex, colWidth);
TDBG_SDFD(" col %d with percentwidth=%f set to %d\n", colIndex, percent, colWidth);
excess -= colWidth;
}
if (0 < excess) {
PRInt32 numAutoColumns=0;
PRInt32* autoColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Auto, numAutoColumns, autoColumns);
TDBG_SDD(" excess=%d with %d autoColumns\n", excess, numAutoColumns);
if (0 < numAutoColumns) {
nscoord excessPerColumn = excess / numAutoColumns;
for (i = 0; i < numAutoColumns; i++) {
colIndex = autoColumns[i];
nscoord newWidth = PR_MAX(excessPerColumn, mTableFrame->GetColumnWidth(colIndex));
TDBG_SDDD(" col %d was %d set to %d\n",
colIndex, mTableFrame->GetColumnWidth(colIndex), newWidth);
mTableFrame->SetColumnWidth(colIndex, newWidth);
excess -= excessPerColumn;
}
// handle division underflow
if (0 < excess) {
TDBG_SD(" after first pass through auto-width columns, excess=%d\n", excess);
for (i = 0; i < numAutoColumns; i++) {
colIndex = autoColumns[i];
nscoord newWidth = 1 + mTableFrame->GetColumnWidth(colIndex);
mTableFrame->SetColumnWidth(colIndex, newWidth);
}
}
}
}
}
else {
// all columns have a percent width. Each already has its desired width.
// find the smallest percentage and base the widths of the others off that
PRInt32 indexOfSmallest;
nscoord colWidthOfSmallest;
float smallestPercent = 2.0f; // an illegal large number
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
colFrame = mTableFrame->GetColFrame(colIndex);
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
percent = colPosition->mWidth.GetPercentValue(); // we know this will work
if (percent < smallestPercent) {
smallestPercent=percent;
indexOfSmallest=colIndex;
colWidthOfSmallest = mTableFrame->GetColumnWidth(colIndex);
}
else if (percent==smallestPercent) {
// the largest desired size among equal-percent columns wins
nscoord colWidth = mTableFrame->GetColumnWidth(colIndex);
if (colWidth > colWidthOfSmallest) {
indexOfSmallest = colIndex;
colWidthOfSmallest = colWidth;
}
}
}
// now that we know which column to base the other columns' widths off of, do it!
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
colFrame = mTableFrame->GetColFrame(colIndex);
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
percent = colPosition->mWidth.GetPercentValue(); // we know this will work
if (percent == smallestPercent) { // set col width to the max width of all columns that shared the smallest percent-width
mTableFrame->SetColumnWidth(colIndex, colWidthOfSmallest);
}
else {
colWidth = (nscoord)((percent/smallestPercent) * ((float)colWidthOfSmallest));
nscoord minColWidth = colFrame->GetEffectiveMinColWidth();
colWidth = PR_MAX(colWidth, minColWidth);
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
TDBG_SDFD(" col %d with percentwidth=%f set to %d\n", colIndex, percent, colWidth);
}
}
}
// second, assign column widths to proportional-width columns
if (nsnull != proportionalColumnsList) {
// first, figure out the amount of space per slice
nscoord maxWidthForTable = (0 != aTableSpecifiedWidth) ? aTableSpecifiedWidth : aMaxWidth;
if (NS_UNCONSTRAINEDSIZE != maxWidthForTable) {
nscoord widthRemaining = maxWidthForTable - tableWidth;
nscoord widthPerSlice = widthRemaining/totalSlices;
PRInt32 numSpecifiedProportionalColumns = proportionalColumnsList->Count();
for (PRInt32 i = 0; i < numSpecifiedProportionalColumns; i++) {
// for every proportionally-sized column, set the col width to the computed width
ProportionalColumnLayoutStruct* info =
(ProportionalColumnLayoutStruct *)(proportionalColumnsList->ElementAt(i));
// verify that the computed width is at least the minimum width
nscoord computedColWidth = info->mProportion*widthPerSlice;
// compute the requested proportional width
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(info->mColIndex, colFrame);
nscoord minColWidth = colFrame->GetMinColWidth();
computedColWidth = PR_MAX(computedColWidth, minColWidth);
mTableFrame->SetColumnWidth(info->mColIndex, computedColWidth);
TDBG_SDDDD(" 3 proportional step 2: col %d given %d proportion of remaining space %d, set to width = %d\n",
info->mColIndex, info->mProportion, widthRemaining, computedColWidth);
tableWidth += computedColWidth;
delete info;
}
}
else {
// we're in an unconstrained situation, so give each column the max of the max column widths
PRInt32 numSpecifiedProportionalColumns = proportionalColumnsList->Count();
PRInt32 maxOfMaxColWidths = 0;
PRInt32 i;
for (i = 0; i < numSpecifiedProportionalColumns; i++) {
ProportionalColumnLayoutStruct* info =
(ProportionalColumnLayoutStruct *)(proportionalColumnsList->ElementAt(i));
maxOfMaxColWidths = PR_MAX(maxOfMaxColWidths, info->mMaxColWidth);
}
for (i = 0; i < numSpecifiedProportionalColumns; i++) {
ProportionalColumnLayoutStruct* info =
(ProportionalColumnLayoutStruct *)(proportionalColumnsList->ElementAt(i));
mTableFrame->SetColumnWidth(info->mColIndex, maxOfMaxColWidths);
TDBG_SDD(" 3 proportional step 2 (unconstrained!): col %d set to width = %d\n",
info->mColIndex, maxOfMaxColWidths);
tableWidth += maxOfMaxColWidths;
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(info->mColIndex, colFrame);
colFrame->SetEffectiveMaxColWidth(maxOfMaxColWidths);
delete info;
}
}
delete proportionalColumnsList;
}
// next, account for table width constraints
// if the caption min width is wider than than the table, expand the table
nscoord captionMinWidth = mTableFrame->GetMinCaptionWidth();
if (captionMinWidth > tableWidth) {
DistributeExcessSpace(captionMinWidth, tableWidth, widthOfFixedTableColumns);
}
else {
// else, if the caption min width is not an issue...
// if the specified width of the table is greater than the table's computed width, expand the
// table's computed width to match the specified width, giving the extra space to proportionately-sized
// columns if possible.
if ((PR_FALSE == aTableIsAutoWidth) && (aAvailWidth > (tableWidth-widthOfFixedTableColumns)) &&
(gBigSpace != aAvailWidth)) {
DistributeExcessSpace(aAvailWidth, tableWidth, widthOfFixedTableColumns);
}
// IFF the table is NOT (auto-width && all columns have fixed width)
PRInt32 numFixedColumns=0;
PRInt32* fixedColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Coord, numFixedColumns, fixedColumns);
if (!((PR_TRUE == aTableIsAutoWidth) && (numFixedColumns == mNumCols))) {
nscoord computedWidth = 0;
for (PRInt32 i = 0; i < mNumCols; i++) {
computedWidth += mTableFrame->GetColumnWidth(i) + colInset;
}
if (computedWidth > aMaxWidth) {
AdjustTableThatIsTooWide(computedWidth, aMaxWidth, PR_FALSE);
}
}
}
// cleanup
if (nsnull != spanList) {
TDBG_S("BTLS::BCTFits...space leak, span list not empty");
delete spanList;
}
return result;
}
// take the extra space in the table and distribute it proportionately (based on desired width)
// give extra space to auto-width cells first, or if there are none to all cells
void BasicTableLayoutStrategy::DistributeExcessSpace(nscoord aAvailWidth,
nscoord aTableWidth,
nscoord aWidthOfFixedTableColumns)
{
nscoord excess = 0;
TDBG_SDDD("DistributeExcessSpace: fixed width %d > computed table width %d, woftc=%d\n",
aAvailWidth, aTableWidth, aWidthOfFixedTableColumns);
nscoord widthMinusFixedColumns = aTableWidth - aWidthOfFixedTableColumns;
// if there are auto-sized columns, give them the extra space
// the trick here is to do the math excluding non-auto width columns
PRInt32 numAutoColumns=0;
PRInt32* autoColumns=nsnull;
GetColumnsThatActLikeAutoWidth(numAutoColumns, autoColumns); // allocates autoColumns, be sure to delete it
if (0 != numAutoColumns) {
// there's at least one auto-width column, so give it (them) the extra space
// proportionately distributed extra space, based on the column's desired size
nscoord totalEffectiveWidthOfAutoColumns = 0;
// 1. first, get the total width of the auto columns
PRInt32 i;
for (i = 0; i < numAutoColumns; i++) {
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(autoColumns[i], colFrame);
nscoord effectiveColWidth = colFrame->GetEffectiveMaxColWidth();
if (0 != effectiveColWidth) {
totalEffectiveWidthOfAutoColumns += effectiveColWidth;
}
else {
totalEffectiveWidthOfAutoColumns += mTableFrame->GetColumnWidth(autoColumns[i]);
}
}
// excess is the amount of space that was available minus the computed available width
// XXX shouldn't it just be aMaxWidth - aTableWidth???
TDBG_SDD(" aAvailWidth specified as %d, expanding columns by excess = %d\n", aAvailWidth, excess);
excess = aAvailWidth - widthMinusFixedColumns;
// 2. next, compute the proportion to be added to each column, and add it
nscoord totalAdded=0;
for (i = 0; i < numAutoColumns; i++) {
PRInt32 colIndex = autoColumns[i];
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(colIndex, colFrame);
nscoord oldColWidth = mTableFrame->GetColumnWidth(colIndex);
float percent;
if (0 != totalEffectiveWidthOfAutoColumns) {
percent = ((float)(colFrame->GetEffectiveMaxColWidth())) / ((float)totalEffectiveWidthOfAutoColumns);
}
else {
percent = ((float)1 )/ ((float)numAutoColumns);
}
nscoord excessForThisColumn = (nscoord)(excess * percent);
totalAdded += excessForThisColumn;
nscoord colWidth = excessForThisColumn+oldColWidth;
TDBG_SDDD(" distribute excess to auto columns: column %d was %d, now set to %d\n",
colIndex, oldColWidth, colWidth);
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
TDBG_SDD("lost a few twips due to rounding errors: excess=%d, totalAdded=%d\n", excess, totalAdded);
}
// otherwise, distribute the space between all the columns
// (they must be all fixed and percentage-width columns, or we would have gone into the block above)
else {
excess = aAvailWidth - widthMinusFixedColumns;
TDBG_SDD(" aAvailWidth specified as %d, expanding columns by excess = %d\n", aAvailWidth, excess);
nscoord totalAdded=0;
for (PRInt32 colIndex = 0; colIndex < mNumCols; colIndex++) {
nscoord oldColWidth=0;
if (0 == oldColWidth) {
oldColWidth = mTableFrame->GetColumnWidth(colIndex);
}
float percent;
if (0 != aTableWidth) {
percent = (float)oldColWidth/(float)aTableWidth;
}
else {
percent = (float)1 / (float)mNumCols;
}
nscoord excessForThisColumn = (nscoord)(NSToCoordRound(excess * percent));
totalAdded += excessForThisColumn;
nscoord colWidth = excessForThisColumn + oldColWidth;
TDBG_SDDDF(" distribute excess: column %d was %d, now %d from %=%f\n",
colIndex, oldColWidth, colWidth, percent);
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
TDBG_SDD("lost a few twips due to rounding errors: excess=%d, totalAdded=%d\n", excess, totalAdded);
}
if (nsnull != autoColumns) {
delete [] autoColumns;
}
}
/* assign columns widths for a table whose max size doesn't fit in the available space
*/
PRBool BasicTableLayoutStrategy::
BalanceColumnsConstrained(const nsHTMLReflowState& aReflowState,
nscoord aAvailWidth,
nscoord aMaxWidth,
PRBool aTableIsAutoWidth)
{
#ifdef NS_DEBUG
nsIFrame* tablePIF=nsnull;
mTableFrame->GetPrevInFlow(&tablePIF);
NS_ASSERTION(nsnull==tablePIF, "never ever call me on a continuing frame!");
#endif
PRBool result = PR_TRUE;
PRInt32 maxOfAllMinColWidths = 0; // for the case where we have equal column widths, this is the smallest a column can be
nscoord tableWidth = 0; // the width of the table as a result of setting column widths
PRInt32 totalSlices = 0; // the total number of slices the proportional-width columns request
nsVoidArray* proportionalColumnsList=nsnull; // a list of the columns that are proportional-width
PRBool equalWidthColumns = PR_TRUE; // remember if we're in the special case where all
// proportional-width columns are equal (if any are anything other than 1)
PRBool atLeastOneAutoWidthColumn = PR_FALSE; // true if at least one column is auto-width, requiring us to post-process
nsVoidArray* spanList=nsnull; // a list of the cells that span columns
PRInt32 numRows = mTableFrame->GetRowCount();
nscoord colInset = mTableFrame->GetCellSpacingX();
for (PRInt32 colIndex = 0; colIndex < mNumCols; colIndex++) {
TDBG_SD(" for col %d\n", colIndex);
nscoord minColWidth = 0;
nscoord maxColWidth = 0;
// Get column information
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex);
NS_ASSERTION(nsnull != colFrame, "bad col frame");
// Get the columns's style and margins
PRInt32 rowIndex;
PRInt32 firstRowIndex = -1;
const nsStylePosition* colPosition;
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
const nsStyleTable* colTableStyle;
colFrame->GetStyleData(eStyleStruct_Table, (const nsStyleStruct*&)colTableStyle);
// first, deal with any cells that span into this column from a pervious column
// go through the list backwards so we can delete easily
if (nsnull != spanList) {
PRInt32 spanCount = spanList->Count();
// go through the list backwards so we can delete easily
for (PRInt32 spanIndex=spanCount-1; 0<=spanIndex; spanIndex--) {
SpanInfo* spanInfo = (SpanInfo *)(spanList->ElementAt(spanIndex));
if (PR_FALSE == IsFixedWidth(colPosition, colTableStyle)) {
// compute the spanning cell's contribution to the column min width
nscoord spanCellMinWidth;
PRBool needsExtraMinWidth = PR_FALSE;
//if (spanInfo->effectiveMinWidthOfSpannedCols<spanInfo->cellMinWidth)
// needsExtraMinWidth = PR_TRUE;
if (PR_TRUE == needsExtraMinWidth) {
if (0 != spanInfo->effectiveMinWidthOfSpannedCols) {
spanCellMinWidth = (spanInfo->cellMinWidth * colFrame->GetEffectiveMinColWidth()) /
(spanInfo->effectiveMinWidthOfSpannedCols);
TDBG_SDD(" spanlist min: %d of %d\n", spanCellMinWidth, spanInfo->effectiveMaxWidthOfSpannedCols);
if (minColWidth < spanCellMinWidth) {
minColWidth = spanCellMinWidth; // set the new min width for the col
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new min = %d\n",
colIndex, spanInfo->span, minColWidth);
maxColWidth = PR_MAX(maxColWidth, minColWidth);
TDBG_SD(" maxColWidth = %d\n", maxColWidth);
}
}
else {
spanCellMinWidth = spanInfo->cellMinWidth / spanInfo->initialColSpan;
if (minColWidth < spanCellMinWidth) {
minColWidth = spanCellMinWidth;
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new min = %d\n",
colIndex, spanInfo->span, minColWidth);
maxColWidth = PR_MAX(maxColWidth, minColWidth);
TDBG_SD(" maxColWidth = %d\n", maxColWidth);
}
}
}
// compute the spanning cell's contribution to the column max width
nscoord spanCellMaxWidth;
if (0 != spanInfo->effectiveMaxWidthOfSpannedCols) {
spanCellMaxWidth = (spanInfo->cellDesiredWidth * colFrame->GetEffectiveMinColWidth()) /
(spanInfo->effectiveMaxWidthOfSpannedCols);
TDBG_SDD(" spanlist max: %d of %d\n", spanCellMaxWidth, spanInfo->effectiveMaxWidthOfSpannedCols);
if (maxColWidth < spanCellMaxWidth) {
maxColWidth = spanCellMaxWidth; // set the new max width for the col
mTableFrame->SetColumnWidth(colIndex, spanCellMaxWidth); // set the column to the new desired max width
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new max = %d\n",
colIndex, spanInfo->span, maxColWidth);
}
}
else {
spanCellMaxWidth = spanInfo->cellDesiredWidth/spanInfo->initialColSpan;
maxColWidth = spanCellMaxWidth;
mTableFrame->SetColumnWidth(colIndex, spanCellMaxWidth);
TDBG_SDDD(" for spanning cell into col %d with remaining span=%d, new max = %d\n",
colIndex, spanInfo->span, maxColWidth);
}
}
spanInfo->span--;
if (0 == spanInfo->span) {
spanList->RemoveElementAt(spanIndex);
delete spanInfo;
}
}
}
// second, process non-fixed-width columns
if (PR_FALSE == IsFixedWidth(colPosition, colTableStyle)) {
for (rowIndex = 0; rowIndex < numRows; rowIndex++) {
nsTableCellFrame* cellFrame = mTableFrame->GetCellFrameAt(rowIndex, colIndex);
if (nsnull == cellFrame) { // there is no cell in this row that corresponds to this column
continue;
}
PRInt32 cellRowIndex;
cellFrame->GetRowIndex(cellRowIndex);
if (rowIndex!=cellRowIndex) {
// For cells that span rows, we only figure it in once
NS_ASSERTION(1 != cellFrame->GetRowSpan(), "row index does not match row span"); // sanity check
continue;
}
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
if (colIndex!=cellColIndex) {
// For cells that span cols, we figure in the row using previously-built SpanInfo
NS_ASSERTION(1 != cellFrame->GetColSpan(), "col index does not match row span"); // sanity check
continue;
}
PRInt32 colSpan = mTableFrame->GetEffectiveColSpan(colIndex, cellFrame);
nsSize cellMinSize = cellFrame->GetPass1MaxElementSize();
nsSize cellDesiredSize = cellFrame->GetPass1DesiredSize();
nscoord cellMinWidth=colFrame->GetAdjustedMinColWidth();
nscoord cellDesiredWidth=colFrame->GetMaxColWidth();
if (1 == colSpan) {
cellMinWidth = cellMinSize.width;
cellDesiredWidth = cellDesiredSize.width;
nscoord specifiedCellWidth = -1;
const nsStylePosition* cellPosition;
cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)cellPosition);
if (eStyleUnit_Percent==cellPosition->mWidth.GetUnit()) {
float percent = cellPosition->mWidth.GetPercentValue();
specifiedCellWidth = (PRInt32)(aMaxWidth * percent);
TDBG_SFDD("specified percent width %f of %d = %d\n", percent, aMaxWidth, specifiedCellWidth);
}
if (-1 != specifiedCellWidth) {
if (specifiedCellWidth>cellMinWidth) {
TDBG_SDD("setting cellDesiredWidth from %d to %d\n", cellDesiredWidth, specifiedCellWidth);
cellDesiredWidth = specifiedCellWidth;
}
}
}
else { // colSpan>1, get the proportion for this column
// then get the desired size info factoring in the cell style attributes
nscoord effectiveMaxWidthOfSpannedCols = colFrame->GetEffectiveMaxColWidth();
nscoord effectiveMinWidthOfSpannedCols = colFrame->GetEffectiveMinColWidth();
for (PRInt32 span = 1; span < colSpan; span++) {
nsTableColFrame* nextColFrame = mTableFrame->GetColFrame(colIndex+span);
if (nsnull == nextColFrame) {
break;
}
effectiveMaxWidthOfSpannedCols += nextColFrame->GetEffectiveMaxColWidth();
effectiveMinWidthOfSpannedCols += nextColFrame->GetEffectiveMinColWidth();
}
nscoord specifiedCellWidth = -1;
const nsStylePosition* cellPosition;
cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)cellPosition);
if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) {
//XXX what if table is auto width?
float percent = cellPosition->mWidth.GetPercentValue();
specifiedCellWidth = (PRInt32)(aMaxWidth * percent);
TDBG_SFDD("specified percent width %f of %d = %d\n", percent, aMaxWidth, specifiedCellWidth);
}
if (-1 != specifiedCellWidth) {
float percentForThisCol = (float)(cellDesiredSize.width * colFrame->GetEffectiveMaxColWidth()) /
(float)effectiveMaxWidthOfSpannedCols;
nscoord cellWidthForThisCol = (nscoord)(specifiedCellWidth * percentForThisCol);
if (cellWidthForThisCol>cellMinWidth) {
TDBG_SDD("setting cellDesiredWidth from %d to %d\n", cellDesiredWidth, cellWidthForThisCol);
cellDesiredWidth = cellWidthForThisCol;
}
}
// otherwise it's already been factored in.
// now, if this column holds the cell, create a spanInfo struct for the cell
// so subsequent columns can take a proportion of this cell's space into account
PRInt32 cellColIndex;
cellFrame->GetColIndex(cellColIndex);
if (cellColIndex == colIndex) {
// add this cell to span list iff we are currently processing the column the cell starts in
SpanInfo* spanInfo = new SpanInfo(colIndex, colSpan-1, cellMinSize.width, cellDesiredSize.width);
spanInfo->effectiveMaxWidthOfSpannedCols = effectiveMaxWidthOfSpannedCols;
spanInfo->effectiveMinWidthOfSpannedCols = effectiveMinWidthOfSpannedCols;
if (nsnull == spanList) {
spanList = new nsVoidArray();
}
spanList->AppendElement(spanInfo);
}
}
TDBG_SDDDD("factoring in cell %d with colSpan=%d\n factoring in min=%d and desired=%d\n",
rowIndex, colSpan, cellMinWidth, cellDesiredWidth);
// remember the widest min cell width
minColWidth = PR_MAX(minColWidth, cellMinWidth);
// remember the max desired cell width
maxColWidth = PR_MAX(maxColWidth, cellDesiredWidth);
// effectiveMaxColumnWidth is the width as if no cells with colspans existed
// if ((1==colSpan) && (colFrame->GetEffectiveMaxColWidth() < maxColWidth))
// colFrame->SetEffectiveMaxColWidth(cellDesiredWidth);
TDBG_SDDDDDD(" after cell %d, minColWidth=%d maxColWidth=%d effColWidth[%d]=%d,%d\n",
rowIndex, minColWidth, maxColWidth, colIndex,
colFrame->GetEffectiveMinColWidth(), colFrame->GetEffectiveMaxColWidth());
}
if (PR_TRUE == gsDebug) {
printf (" for determining width of col %d %s:\n",
colIndex, !IsFixedWidth(colPosition, colTableStyle)? "(P)":"(A)");
printf (" minTableWidth = %d and maxTableWidth = %d\n",
mMinTableWidth, mMaxTableWidth);
printf (" minColWidth = %d, maxColWidth = %d, eff=%d,%d\n",
minColWidth, maxColWidth, colFrame->GetEffectiveMinColWidth(),
colFrame->GetEffectiveMaxColWidth());
printf (" aAvailWidth = %d\n", aAvailWidth);
}
// Get column width if it has one
nscoord specifiedProportionColumnWidth = -1;
float specifiedPercentageColWidth = -1.0f;
PRBool isAutoWidth = PR_FALSE;
switch (colPosition->mWidth.GetUnit()) {
case eStyleUnit_Percent:
specifiedPercentageColWidth = colPosition->mWidth.GetPercentValue();
TDBG_SDF("column %d has specified percent width = %f\n", colIndex, specifiedPercentageColWidth);
break;
case eStyleUnit_Proportional:
specifiedProportionColumnWidth = colPosition->mWidth.GetIntValue();
TDBG_SDD("column %d has specified percent width = %d\n", colIndex, specifiedProportionColumnWidth);
break;
case eStyleUnit_Auto:
isAutoWidth = PR_TRUE;
break;
default:
break;
}
// set the column width, knowing that the table is constrained
if (0 == specifiedProportionColumnWidth || 0.0 == specifiedPercentageColWidth) {
// col width is specified to be the minimum
mTableFrame->SetColumnWidth(colIndex, minColWidth);
TDBG_SDD(" 4 (0): col %d set to min width = %d because style set proportionalWidth=0\n",
colIndex, mTableFrame->GetColumnWidth(colIndex));
}
else if (1 == mNumCols) { // there is only one column, and we know that it's desired width doesn't fit
// so the column should be as wide as the available space allows it to be minus cell spacing
nscoord colWidth = aAvailWidth - (2*colInset);
mTableFrame->SetColumnWidth(colIndex, colWidth);
TDBG_SDDDD(" 4 one-col: col %d set to width = %d from available width %d and cell spacing %d\n",
colIndex, mTableFrame->GetColumnWidth(colIndex), aAvailWidth, colInset);
}
else if (PR_TRUE==isAutoWidth) { // column's width is determined by its content, done in post-processing
mTableFrame->SetColumnWidth(colIndex, minColWidth); // reserve the column's min width
atLeastOneAutoWidthColumn = PR_TRUE;
}
else if (-1 != specifiedProportionColumnWidth) {
// we need to save these and do them after all other columns have been calculated
// the calculation will be:
// sum up n, the total number of slices for the columns with proportional width
// compute the table "required" width, fixed-width + percentage-width +
// the sum of the proportional column's max widths (especially because in this routine I know the table fits)
// compute the remaining width: the required width - the used width (fixed + percentage)
// compute the width per slice
// set the width of each proportional-width column to it's number of slices * width per slice
mTableFrame->SetColumnWidth(colIndex, 0); // set the column width to 0, since it isn't computed yet
if (nsnull == proportionalColumnsList) {
proportionalColumnsList = new nsVoidArray();
}
ProportionalColumnLayoutStruct* info =
new ProportionalColumnLayoutStruct(colIndex, minColWidth, maxColWidth, specifiedProportionColumnWidth);
proportionalColumnsList->AppendElement(info);
totalSlices += specifiedProportionColumnWidth;
if (1 != specifiedProportionColumnWidth) {
equalWidthColumns = PR_FALSE;
}
}
else { // give the column a percentage of the remaining space
PRInt32 percentage = -1;
if (NS_UNCONSTRAINEDSIZE == aAvailWidth) {
// since the "remaining space" is infinite, give the column it's max requested size
mTableFrame->SetColumnWidth(colIndex, maxColWidth);
}
else {
if (-1.0f != specifiedPercentageColWidth) {
percentage = (PRInt32)(specifiedPercentageColWidth * 100.0f); // TODO: rounding errors?
// base the % on the total specified fixed width of the table
mTableFrame->SetColumnWidth(colIndex, (percentage*aMaxWidth)/100);
TDBG_SDDDD(" 4 percent specified: col %d given %d percent of aMaxWidth %d, set to width = %d\n",
colIndex, percentage, aMaxWidth, mTableFrame->GetColumnWidth(colIndex));
}
if (-1 == percentage) {
percentage = 100 / mNumCols;
// base the % on the remaining available width
mTableFrame->SetColumnWidth(colIndex, (percentage * aAvailWidth) / 100);
TDBG_SDDDD(" 4 percent default: col %d given %d percent of aAvailWidth %d, set to width = %d\n",
colIndex, percentage, aAvailWidth, mTableFrame->GetColumnWidth(colIndex));
}
// if the column was computed to be too small, enlarge the column
if (mTableFrame->GetColumnWidth(colIndex) <= minColWidth) {
mTableFrame->SetColumnWidth(colIndex, minColWidth);
TDBG_SD(" enlarging column to it's minimum = %d\n", minColWidth);
if (maxOfAllMinColWidths < minColWidth) {
maxOfAllMinColWidths = minColWidth;
TDBG_SD(" and setting maxOfAllMins to %d\n", maxOfAllMinColWidths);
}
}
}
}
}
else {
mTableFrame->SetColumnWidth(colIndex, colFrame->GetMaxColWidth());
}
tableWidth += mTableFrame->GetColumnWidth(colIndex) + colInset;
}
tableWidth += colInset;
// --- post-process if necessary --- /
// first, assign autoWidth columns a width
if (PR_TRUE == atLeastOneAutoWidthColumn) {
// proportionately distribute the remaining space to autowidth columns
// "0" for the last param tells DistributeRemainingSpace that this is the top (non-recursive) call
PRInt32 topRecursiveControl=0;
DistributeRemainingSpace(aMaxWidth, tableWidth, aTableIsAutoWidth, topRecursiveControl);
}
// second, fix up tables where column width attributes give us a table that is too wide or too narrow
nscoord computedWidth = colInset;
for (PRInt32 i = 0; i < mNumCols; i++) {
computedWidth += mTableFrame->GetColumnWidth(i) + colInset;
}
if (computedWidth<aMaxWidth) {
// then widen the table because it's too narrow
// do not widen auto-width tables, they shrinkwrap to their content's width
if (PR_FALSE == aTableIsAutoWidth) {
AdjustTableThatIsTooNarrow(computedWidth, aMaxWidth);
}
}
else if (computedWidth>aMaxWidth) {
// then shrink the table width because its too wide
AdjustTableThatIsTooWide(computedWidth, aMaxWidth, PR_FALSE);
}
// finally, assign a width to proportional-width columns
if (nsnull!=proportionalColumnsList) {
// first, figure out the amount of space per slice
nscoord widthRemaining = aMaxWidth - tableWidth;
nscoord widthPerSlice = widthRemaining / totalSlices;
PRInt32 numSpecifiedProportionalColumns = proportionalColumnsList->Count();
for (PRInt32 i = 0; i < numSpecifiedProportionalColumns; i++) {
ProportionalColumnLayoutStruct* info =
(ProportionalColumnLayoutStruct *)(proportionalColumnsList->ElementAt(i));
if (PR_TRUE == equalWidthColumns && 0 != maxOfAllMinColWidths) {
TDBG_SDD(" EqualColWidths specified and some column couldn't fit, so setting col %d width to %d\n",
info->mColIndex, maxOfAllMinColWidths);
mTableFrame->SetColumnWidth(info->mColIndex, maxOfAllMinColWidths);
}
else {
// compute the requested proportional width
nscoord computedColWidth = info->mProportion * widthPerSlice;
// verify that the computed width is at least the minimum width
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(info->mColIndex, colFrame);
nscoord minColWidth = colFrame->GetMinColWidth();
computedColWidth = PR_MAX(computedColWidth, minColWidth);
mTableFrame->SetColumnWidth(info->mColIndex, computedColWidth);
TDBG_SDDDD(" 4 proportion: col %d given %d proportion of remaining space %d, set to width = %d\n",
info->mColIndex, info->mProportion, widthRemaining, computedColWidth);
}
delete info;
}
delete proportionalColumnsList;
}
// clean up
if (nsnull != spanList) {
TDBG_S("BTLS::BCTConstrained...space leak, span list not empty");
delete spanList;
}
return result;
}
static const PRInt32 kRecursionLimit = 10; // backwards compatible with Nav4
// take the remaining space in the table and distribute it proportionately
// to the auto-width cells in the table (based on desired width)
void BasicTableLayoutStrategy::DistributeRemainingSpace(nscoord aTableSpecifiedWidth,
nscoord& aComputedTableWidth,
PRBool aTableIsAutoWidth,
PRInt32& aRecursionControl)
{
aRecursionControl++;
if (kRecursionLimit <= aRecursionControl) { // only allow kRecursionLimit iterations, as per Nav4. See laytable.c
return;
}
nscoord sumOfMinWidths = 0; // sum of min widths of each auto column
nscoord startingComputedTableWidth = aComputedTableWidth; // remember this so we can see if we're making any progress
TDBG_SDD("DistributeRemainingSpace: fixed width %d > computed table width %d\n",
aTableSpecifiedWidth, aComputedTableWidth);
// if there are auto-sized columns, give them the extra space
PRInt32 numAutoColumns = 0;
PRInt32* autoColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Auto, numAutoColumns, autoColumns);
if (0 != numAutoColumns) {
PRInt32 numColumnsToBeResized = 0;
// there's at least one auto-width column, so give it (them) the extra space
// proportionately distributed extra space, based on the column's desired size
nscoord totalEffectiveWidthOfAutoColumns = 0;
// 1. first, get the total width of the auto columns
PRInt32 i;
for (i = 0; i < numAutoColumns; i++) {
PRInt32 colIndex = autoColumns[i];
nsTableColFrame* colFrame = mTableFrame->GetColFrame(autoColumns[i]);
nscoord startingColWidth = mTableFrame->GetColumnWidth(colIndex);
nscoord maxEffectiveColWidth = colFrame->GetEffectiveMaxColWidth();
if ((PR_FALSE == aTableIsAutoWidth) || (startingColWidth<maxEffectiveColWidth)) {
numColumnsToBeResized++;
if (0 != maxEffectiveColWidth) {
totalEffectiveWidthOfAutoColumns += maxEffectiveColWidth;
}
else {
totalEffectiveWidthOfAutoColumns += mTableFrame->GetColumnWidth(autoColumns[i]);
}
}
}
// availWidth is the difference between the total available width and the
// amount of space already assigned, assuming auto col widths were assigned 0.
nscoord availWidth;
availWidth = aTableSpecifiedWidth - aComputedTableWidth;
TDBG_SDD(" aTableSpecifiedWidth specified as %d, availWidth is = %d\n", aTableSpecifiedWidth, availWidth);
// 2. next, compute the proportion to be added to each column, and add it
for (i = 0; i < numAutoColumns; i++) {
PRInt32 colIndex = autoColumns[i];
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex);
nscoord startingColWidth = mTableFrame->GetColumnWidth(colIndex);
nscoord maxEffectiveColWidth = colFrame->GetEffectiveMaxColWidth();
// if we actually have room to distribute, do it here
// otherwise, the auto columns already are set to their minimum
if (0 < availWidth) {
if ((PR_FALSE == aTableIsAutoWidth) || (startingColWidth<maxEffectiveColWidth)) {
float percent;
if (0 != aTableSpecifiedWidth) {
percent = ((float)maxEffectiveColWidth)/((float)totalEffectiveWidthOfAutoColumns);
}
else {
percent = ((float)1) / ((float)numColumnsToBeResized);
}
nscoord colWidth = startingColWidth + NSToCoordRound(((float)(availWidth)) * percent);
TDBG_SDDDD(" colWidth = %d from startingColWidth %d plus %d percent of availWidth %d\n",
colWidth, startingColWidth, (nscoord)((float)100*percent), availWidth);
// in an auto width table, the column cannot be wider than its max width
if (PR_TRUE == aTableIsAutoWidth) {
// since the table shrinks to the content width, don't be wider than the content max width
colWidth = PR_MIN(colWidth, colFrame->GetMaxColWidth());
}
aComputedTableWidth += colWidth - startingColWidth;
TDBG_SDDD(" distribute width to auto columns: column %d was %d, now set to %d\n",
colIndex, colFrame->GetEffectiveMaxColWidth(), colWidth);
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
}
}
if (aComputedTableWidth!=startingComputedTableWidth) {
// othewise we made no progress and shouldn't continue
if (aComputedTableWidth < aTableSpecifiedWidth) {
DistributeRemainingSpace(aTableSpecifiedWidth, aComputedTableWidth, aTableIsAutoWidth, aRecursionControl);
}
}
}
TDBG_WIDTHS4("at end of DistributeRemainingSpace: ",PR_FALSE,PR_FALSE);
}
void BasicTableLayoutStrategy::AdjustTableThatIsTooWide(nscoord aComputedWidth,
nscoord aTableWidth,
PRBool aShrinkFixedCols)
{
TDBG_WIDTHS4("before AdjustTableThatIsTooWide: ",PR_FALSE,PR_FALSE);
PRInt32 numFixedColumns = 0;
PRInt32* fixedColumns = nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Coord, numFixedColumns, fixedColumns);
PRInt32 numAutoColumns = 0;
PRInt32* autoColumns = nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Auto, numAutoColumns, autoColumns);
nscoord excess = aComputedWidth - aTableWidth;
nscoord minDiff; // the smallest non-zero delta between a column's current width and its min width
PRInt32* colsToShrink = new PRInt32[mNumCols];
// while there is still extra computed space in the table
while (0 < excess) {
// reinit state variables
PRInt32 colIndex;
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
colsToShrink[colIndex] = 0;
}
minDiff = 0;
// determine what columns we can remove width from
PRInt32 numColsToShrink = 0;
PRBool shrinkAutoOnly = PR_TRUE;
PRBool keepLooking = PR_TRUE;
while (PR_TRUE == keepLooking) {
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
nscoord currentColWidth = mTableFrame->GetColumnWidth(colIndex);
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(colIndex, colFrame);
nscoord minColWidth = colFrame->GetAdjustedMinColWidth();
if (currentColWidth == minColWidth) {
continue;
}
if ((PR_FALSE==aShrinkFixedCols) &&
(PR_TRUE==IsColumnInList(colIndex, fixedColumns, numFixedColumns))) {
continue;
}
if ((PR_TRUE==shrinkAutoOnly) &&
(PR_FALSE==IsColumnInList(colIndex, autoColumns, numAutoColumns))) {
continue;
}
colsToShrink[numColsToShrink] = colIndex;
numColsToShrink++;
nscoord diff = currentColWidth - minColWidth;
if ((0 == minDiff) || (diff < minDiff)) {
minDiff = diff;
}
}
if (PR_FALSE == shrinkAutoOnly) {
keepLooking = PR_FALSE; // we've looked everywhere, so bail. this breaks us out of the loop
}
if (0 != numColsToShrink) {
keepLooking = PR_FALSE; // we found at least one column to shrink, so bail. this breaks us out of the loop
}
shrinkAutoOnly = PR_FALSE;// this guarantees we'll go through this loop only one more time
}
// if there are no columns we can remove space from, we're done
if (0 == numColsToShrink) {
break;
}
// determine the amount to remove from each column
nscoord excessPerColumn;
if (excess < numColsToShrink) {
excessPerColumn = 1;
}
else {
excessPerColumn = excess / numColsToShrink; // guess we can remove as much as we want
}
if (excessPerColumn > minDiff) { // then adjust for minimum col widths
excessPerColumn = minDiff;
}
// remove excessPerColumn from every column we've determined we can remove width from
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
if ((PR_TRUE == IsColumnInList(colIndex, colsToShrink, numColsToShrink))) {
nscoord colWidth = mTableFrame->GetColumnWidth(colIndex);
colWidth -= excessPerColumn;
mTableFrame->SetColumnWidth(colIndex, colWidth);
excess -= excessPerColumn;
if (0 == excess) {
break;
}
}
}
} // end while (0 < excess)
TDBG_WIDTHS4("after AdjustTableThatIsTooWide: ",PR_TRUE,aShrinkFixedCols);
delete [] colsToShrink;
// deal with any excess left over
if ((PR_FALSE == aShrinkFixedCols) && (0 != excess)) {
// if there's any excess left, we know we've shrunk every non-fixed column to its min
// so we have to shrink fixed width columns if possible
AdjustTableThatIsTooWide(aComputedWidth, aTableWidth, PR_TRUE);
}
// otherwise we've shrunk the table to its min, and that's all we can do
}
void BasicTableLayoutStrategy::AdjustTableThatIsTooNarrow(nscoord aComputedWidth,
nscoord aTableWidth)
{
TDBG_WIDTHS4("before AdjustTableThatIsTooNarrow: ",PR_FALSE,PR_FALSE);
PRInt32 numFixedColumns=0;
PRInt32* fixedColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Coord, numFixedColumns, fixedColumns);
nscoord excess = aTableWidth - aComputedWidth;
while (0 < excess) {
PRInt32 colIndex;
PRInt32* colsToGrow = new PRInt32[mNumCols];
// determine what columns we can take add width to
PRInt32 numColsToGrow = 0;
PRBool expandFixedCols = PRBool(mNumCols == numFixedColumns);
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
if ((PR_FALSE == expandFixedCols) &&
(PR_TRUE == IsColumnInList(colIndex, fixedColumns, numFixedColumns))) {
// skip fixed-width cells if we're told to
continue;
}
if (PR_TRUE == ColIsSpecifiedAsMinimumWidth(colIndex)) {
// skip columns that are forced by their attributes to be their minimum width
continue;
}
colsToGrow[numColsToGrow] = colIndex;
numColsToGrow++;
}
if (0 != numColsToGrow) {
nscoord excessPerColumn;
if (excess<numColsToGrow) {
excessPerColumn = 1;
}
else {
excessPerColumn = excess / numColsToGrow;
}
for (colIndex = 0; colIndex < mNumCols; colIndex++) {
if ((PR_TRUE == IsColumnInList(colIndex, colsToGrow, numColsToGrow))) {
nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex);
nscoord colWidth = mTableFrame->GetColumnWidth(colIndex);
colWidth += excessPerColumn;
if (colWidth > colFrame->GetMinColWidth()) {
excess -= excessPerColumn;
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
else {
excess -= mTableFrame->GetColumnWidth(colIndex) - colFrame->GetMinColWidth();
mTableFrame->SetColumnWidth(colIndex, colFrame->GetMinColWidth());
}
if (0 >= excess) {
break;
}
}
}
}
delete [] colsToGrow;
if (0 == numColsToGrow) {
break;
}
} // end while (0 < excess)
TDBG_WIDTHS4("after AdjustTableThatIsTooNarrow: ",PR_FALSE,PR_FALSE);
}
PRBool BasicTableLayoutStrategy::IsColumnInList(const PRInt32 colIndex,
PRInt32* colIndexes,
PRInt32 aNumFixedColumns)
{
PRBool result = PR_FALSE;
for (PRInt32 i = 0; i < aNumFixedColumns; i++) {
if (colIndex == colIndexes[i]) {
result = PR_TRUE;
break;
}
else if (colIndex<colIndexes[i]) {
break;
}
}
return result;
}
PRBool BasicTableLayoutStrategy::ColIsSpecifiedAsMinimumWidth(PRInt32 aColIndex)
{
PRBool result = PR_FALSE;
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(aColIndex, colFrame);
const nsStylePosition* colPosition;
colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition);
switch (colPosition->mWidth.GetUnit()) {
case eStyleUnit_Coord:
if (0 == colPosition->mWidth.GetCoordValue()) {
result = PR_TRUE;
}
break;
case eStyleUnit_Percent:
{
// total hack for now for 0% and 1% specifications
// should compare percent to available parent width and see that it is below minimum
// for this column
float percent = colPosition->mWidth.GetPercentValue();
if (0.0f == percent || 0.01f == percent) {
result = PR_TRUE;
}
break;
}
case eStyleUnit_Proportional:
if (0 == colPosition->mWidth.GetIntValue()) {
result = PR_TRUE;
}
default:
break;
}
return result;
}
// returns a list and count of all columns that behave like they have width=auto
// this includes columns with no width specified, and columns whose fixed width comes from a span
void BasicTableLayoutStrategy::GetColumnsThatActLikeAutoWidth(PRInt32& aNumCols,
PRInt32*& aColList)
{
// initialize out params
aNumCols = 0;
aColList = nsnull;
// get the auto columns
PRInt32 numAutoCols=0;
PRInt32* autoColList=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Auto, numAutoCols, autoColList);
// XXX: have to do next step for %-width as well?
// get the fixed columns
PRInt32 numFixedCols=0;
PRInt32* fixedColList=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Coord, numFixedCols, fixedColList);
if (0 < numAutoCols+numFixedCols) {
// allocate the out param aColList to the biggest it could be (usually a little wasteful, but it's
// temp space and the numbers here are small, even for very big tables
aColList = new PRInt32[numAutoCols+numFixedCols];
// transfer the auto columns to aColList
PRInt32 i;
for (i = 0; i < numAutoCols; i++) {
aColList[i] = autoColList[i];
aNumCols++;
}
// get the columns whose fixed width is due to a colspan and transfer them to aColList
for (i = 0; i < numFixedCols; i++) {
nsTableColFrame* colFrame;
mTableFrame->GetColumnFrame(fixedColList[i], colFrame);
if (nsTableColFrame::eWIDTH_SOURCE_CELL_WITH_SPAN==colFrame->GetWidthSource()) {
aColList[aNumCols] = fixedColList[i];
aNumCols++;
}
}
}
return;
}