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pjs/layout/tables/BasicTableLayoutStrategy.cpp

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/* -*- 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 "nsIPtr.h"
#include "nsHTMLIIDs.h"
NS_DEF_PTR(nsIStyleContext);
#ifdef NS_DEBUG
static PRBool gsDebug = PR_FALSE;
static PRBool gsDebugCLD = PR_FALSE;
#else
static const PRBool gsDebug = PR_FALSE;
static const PRBool gsDebugCLD = PR_FALSE;
#endif
const nscoord gBigSpace = 100000;
/* ---------- ProportionalColumnLayoutStruct ---------- */
// TODO: make public so other subclasses can use it
/** useful info about a column for layout */
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 ---------- */
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 proportional
* for the purposes of column width determination
*/
PRBool BasicTableLayoutStrategy::IsFixedWidth(const nsStylePosition* aStylePosition)
{
PRBool result = PR_FALSE; // assume that it is not fixed width
PRInt32 unitType;
if (nsnull == aStylePosition) {
result=PR_TRUE;
}
else {
unitType = aStylePosition->mWidth.GetUnit();
if (eStyleUnit_Coord==unitType)
result=PR_TRUE;
}
return result;
}
BasicTableLayoutStrategy::BasicTableLayoutStrategy(nsTableFrame *aFrame, PRInt32 aNumCols)
{
NS_ASSERTION(nsnull!=aFrame, "bad frame arg");
mTableFrame = aFrame;
mNumCols = aNumCols;
mMinTableWidth=0;
mMaxTableWidth=0;
mFixedTableWidth=0;
//cache the value of the cols attribute
mCols = mTableFrame->GetEffectiveCOLSAttribute();
}
BasicTableLayoutStrategy::~BasicTableLayoutStrategy()
{
}
PRBool BasicTableLayoutStrategy::Initialize(nsSize* aMaxElementSize)
{
#ifdef 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
mMinTableWidth=0;
mMaxTableWidth=0;
mFixedTableWidth=0;
// Step 1 - assign the width of all fixed-width columns
AssignPreliminaryColumnWidths();
// set aMaxElementSize here because we compute mMinTableWidth in AssignPreliminaryColumnWidths
if (nsnull!=aMaxElementSize)
{
aMaxElementSize->height = 0;
nsMargin borderPadding;
const nsStylePosition* tablePosition;
const nsStyleSpacing* tableSpacing;
// begin REMOVE_ME_WHEN_TABLE_STYLE_IS_RESOLVED!
nsIFrame * parent = nsnull;
mTableFrame->GetGeometricParent(parent);
parent->GetStyleData(eStyleStruct_Position, ((nsStyleStruct *&)tablePosition));
parent->GetStyleData(eStyleStruct_Spacing , ((nsStyleStruct *&)tableSpacing));
// end REMOVE_ME_WHEN_TABLE_STYLE_IS_RESOLVED!
tableSpacing->CalcBorderPaddingFor(mTableFrame, borderPadding);
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;
}
if (PR_TRUE==gsDebug)
printf("%p BTLS::Init setting aMaxElementSize->width = %d\n",
mTableFrame, aMaxElementSize->width);
}
return result;
}
PRBool BasicTableLayoutStrategy::BalanceColumnWidths(nsIStyleContext *aTableStyle,
const nsReflowState& aReflowState,
nscoord aMaxWidth)
{
#ifdef 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);
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
// Step 3 - assign the width of all proportional-width columns in the remaining space
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);
}
if (PR_TRUE==gsDebug)
{
printf("\n%p: BEGIN BALANCE COLUMN WIDTHS\n", mTableFrame);
for (PRInt32 i=0; i<mNumCols; i++)
printf(" col %d assigned width %d\n", i, mTableFrame->GetColumnWidth(i));
printf("\n");
}
result = BalanceProportionalColumns(aReflowState, availWidth, aMaxWidth,
specifiedTableWidth, tableIsAutoWidth);
if (PR_TRUE==gsDebug)
{
printf("\n%p: END BALANCE COLUMN WIDTHS\n", mTableFrame);
for (PRInt32 i=0; i<mNumCols; i++)
printf(" col %d assigned width %d\n", i, mTableFrame->GetColumnWidth(i));
printf("\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()
{
if (gsDebug==PR_TRUE) printf ("** %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];
}
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)
// Get column information
nsTableColFrame *colFrame = mTableFrame->GetColFrame(colIndex);
NS_ASSERTION(nsnull!=colFrame, "bad col frame");
// Get the columns's style
const nsStylePosition* colPosition;
colFrame->GetStyleData(eStyleStruct_Position, (nsStyleStruct*&)colPosition);
// Get fixed column width if it has one
PRBool haveColWidth = PR_FALSE;
if (eStyleUnit_Coord==colPosition->mWidth.GetUnit())
{
haveColWidth = PR_TRUE;
specifiedFixedColWidth = colPosition->mWidth.GetCoordValue();
}
/* 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->GetCellAt(rowIndex, colIndex);
if (nsnull==cellFrame)
{ // there is no cell in this row that corresponds to this column
continue;
}
if (-1==firstRowIndex)
firstRowIndex = rowIndex;
if (rowIndex!=cellFrame->GetRowIndex()) {
// 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);
if (colSpan>maxColSpan)
maxColSpan = colSpan;
if (colIndex!=cellFrame->GetColIndex()) {
// 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;
}
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
if (gsDebug==PR_TRUE)
printf (" 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)// && PR_TRUE==cellGrantingWidth)
{
// This col has a specified 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 < maxColWidth))
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;
}
//bookkeeping: is this the cell that gave the column it's fixed width attribute?
// must be done after "haveColWidth && cellGrantingWidth" used above
if (PR_TRUE==cellGrantingWidth && 1==colSpan)
{
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
}
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)))
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, (nsStyleStruct*&)colPos);
if (colPos->mWidth.GetUnit() != eStyleUnit_Auto)
{
okToAdd = PR_FALSE;
break;
}
}
}
if (PR_TRUE==okToAdd)
{
ColSpanStruct *colSpanInfo = new ColSpanStruct(colSpan, colIndex, cellDesiredSize.width);
if (nsnull==colSpanList)
colSpanList = new nsVoidArray();
colSpanList->AppendElement(colSpanInfo);
}
// add the cell to our list of spanning cells
SpanInfo *spanInfo = new SpanInfo(colIndex, colSpan, cellMinWidth, cellDesiredWidth);
if (nsnull==spanList)
spanList = new nsVoidArray();
spanList->AppendElement(spanInfo);
}
if (gsDebug) {
printf (" after cell %d, minColWidth = %d and maxColWidth = %d\n",
rowIndex, minColWidth, maxColWidth);
}
} // end rowIndex for loop
// 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->GetCellSpacing();
// keep a running total of the amount of space taken up by all fixed-width columns
if (PR_TRUE==haveColWidth)
{
mFixedTableWidth += specifiedFixedColWidth + colInset;
if (0==colIndex)
mFixedTableWidth += colInset;
}
if (gsDebug)
printf ("after col %d, mFixedTableWidth = %d\n", colIndex, 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)
mTableFrame->SetColumnWidth(colIndex, specifiedFixedColWidth);
else
mTableFrame->SetColumnWidth(colIndex, effectiveMaxColumnWidth);
if (gsDebug)
printf ("col %d, set col width to = %d\n", colIndex, mTableFrame->GetColumnWidth(colIndex));
if (PR_TRUE==hasColsAttribute)
{
minColWidthArray[colIndex] = minColWidth;
maxColWidthArray[colIndex] = maxColWidth;
}
if (gsDebug==PR_TRUE)
printf ("after col %d, minColWidth=%d effectiveMinColumnWidth=%d\n\tminTableWidth = %d and maxTableWidth = %d\n",
colIndex, minColWidth, effectiveMinColumnWidth, mMinTableWidth, mMaxTableWidth);
}
// 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
PRInt32 numAutoColumns=0;
PRInt32 *autoColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Auto, numAutoColumns, autoColumns);
if (0==numAutoColumns)
{ //table fully specified, so no need to do any extra work here
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));
spanList->RemoveElementAt(spanIndex);
delete spanInfo;
}
}
else
{
for (PRInt32 colIndex=0; colIndex<mNumCols; colIndex++)
{
if (gsDebug) printf("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--)
{
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 (0==spanInfo->effectiveMaxWidthOfSpannedCols)
{
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();
}
if (gsDebug) printf("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)
{
spanCellMinWidth = (spanInfo->cellMinWidth * colFrame->GetEffectiveMinColWidth()) /
(spanInfo->effectiveMinWidthOfSpannedCols);
if (gsDebug==PR_TRUE)
printf ("spanCellMinWidth portion = %d \n", spanCellMinWidth);
if (colMinWidth < spanCellMinWidth)
colFrame->SetAdjustedMinColWidth(spanCellMinWidth); // set the new min width for the col
}
else
{
if (colMinWidth < spanCellMinWidth)
{
spanCellMinWidth = spanInfo->cellMinWidth/spanInfo->initialColSpan;
colFrame->SetAdjustedMinColWidth(spanCellMinWidth);
}
}
// compute the spanning cell's contribution to the column max width
nscoord colMaxWidth = colFrame->GetMaxColWidth();
nscoord spanCellMaxWidth;
if (0!=spanInfo->effectiveMaxWidthOfSpannedCols)
{
spanCellMaxWidth = (spanInfo->cellDesiredWidth * colFrame->GetEffectiveMaxColWidth()) /
(spanInfo->effectiveMaxWidthOfSpannedCols);
if (gsDebug==PR_TRUE)
printf ("spanCellMaxWidth portion = %d\n", spanCellMaxWidth);
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
if (gsDebug==PR_TRUE)
{
printf ("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);
if (gsDebug==PR_TRUE)
printf (" 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;
}
}
}
}
}
}
// 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)
{
if (gsDebug) printf("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++)
{
if (maxOfMinColWidths < minColWidthArray[effectedColIndex])
maxOfMinColWidths = minColWidthArray[effectedColIndex];
if (maxOfMaxColWidths < maxColWidthArray[effectedColIndex])
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);
if (gsDebug) printf ("col %d now has max col width %d\n", effectedColIndex, maxOfMaxColWidths);
}
delete [] minColWidthArray;
delete [] maxColWidthArray;
}
if (nsnull!=colSpanList)
DistributeFixedSpace(colSpanList);
if (PR_TRUE==gsDebug)
printf ("%p: aMinTW=%d, aMaxTW=%d\n", mTableFrame, mMinTableWidth, mMaxTableWidth);
// clean up
if (nsnull!=spanList)
{
NS_ASSERTION(0==spanList->Count(), "space leak, span list not empty");
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()
{
PRInt32 colIndex, rowIndex;
PRInt32 numRows = mTableFrame->GetRowCount();
nscoord colInset = mTableFrame->GetCellSpacing();
for (rowIndex = 0; rowIndex<numRows; rowIndex++)
{
nscoord rowMinWidth = colInset;
nscoord rowMaxWidth = colInset;
for (colIndex = 0; colIndex<mNumCols; colIndex++)
{
nsTableCellFrame * cellFrame = mTableFrame->GetCellAt(rowIndex, colIndex);
rowMinWidth += colInset;
rowMaxWidth += colInset;
if (nsnull==cellFrame)
{ // there is no cell in this row that corresponds to this column
continue;
}
if (colIndex!=cellFrame->GetColIndex()) {
// For cells that span cols, we figured in the cell the first time we saw it
continue;
}
nsSize cellMinSize = cellFrame->GetPass1MaxElementSize();
nsSize cellMaxSize = cellFrame->GetPass1DesiredSize();
//PRInt32 colSpan = mTableFrame->GetEffectiveColSpan(colIndex, cellFrame);
if (NS_UNCONSTRAINEDSIZE!=rowMinWidth)
rowMinWidth += cellMinSize.width;
if (NS_UNCONSTRAINEDSIZE!=rowMaxWidth)
rowMaxWidth += cellMaxSize.width;
}
if (gsDebug) printf(" 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);
}
// 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;
}
mMinTableWidth = PR_MAX(mMinTableWidth, sumOfAdjustedColMinWidths);
if (gsDebug) printf("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;
if (PR_TRUE==gsDebug) printf ("** 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->GetEffectiveMaxColWidth();
}
// 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->GetEffectiveMaxColWidth()))/((float)totalEffectiveWidth);
nscoord newColWidth = (nscoord)(totalColWidth*percent);
nscoord minColWidth = colFrame->GetEffectiveMinColWidth();
nscoord oldColWidth = mTableFrame->GetColumnWidth(colIndex+i);
if (newColWidth>minColWidth)
{
if (gsDebug==PR_TRUE)
printf(" assigning fixed col width for spanning cells: column %d set to %d\n",
colIndex+i, newColWidth);
mTableFrame->SetColumnWidth(colIndex+i, newColWidth);
colFrame->SetEffectiveMaxColWidth(newColWidth);
mMaxTableWidth += (newColWidth-oldColWidth);
}
}
}
}
/* 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 nsReflowState& 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 = aTableSpecifiedWidth;
if (NS_UNCONSTRAINEDSIZE==aMaxWidth || NS_UNCONSTRAINEDSIZE==mMinTableWidth)
{ // the max width of the table fits comfortably in the available space
if (gsDebug) printf (" * auto table laying out in NS_UNCONSTRAINEDSIZE, calling BalanceColumnsTableFits\n");
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
if (gsDebug) printf (" * auto table minTW does not fit, calling SetColumnsToMinWidth\n");
result = SetColumnsToMinWidth();
}
else if (mMaxTableWidth <= actualMaxWidth)
{ // the max width of the table fits comfortably in the available space
if (gsDebug) printf (" * auto 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
if (gsDebug) printf (" * auto 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::SetColumnsToMinWidth()
{
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;
if (gsDebug==PR_TRUE) printf (" 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, (nsStyleStruct*&)colPosition);
if (PR_FALSE==IsFixedWidth(colPosition))
{
minAdjustedColWidth = colFrame->GetAdjustedMinColWidth();
mTableFrame->SetColumnWidth(colIndex, minAdjustedColWidth);
if (PR_TRUE==hasColsAttribute)
{
minColWidthArray[colIndex] = minAdjustedColWidth;
}
}
if (gsDebug==PR_TRUE)
printf (" 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++)
{
if (maxOfEffectedColWidths < minColWidthArray[effectedColIndex])
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);
if (PR_TRUE==gsDebug)
printf(" 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 nsReflowState& 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->GetCellSpacing();
PRInt32 colIndex;
for (colIndex = 0; colIndex<mNumCols; colIndex++)
{
if (gsDebug==PR_TRUE) printf ("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, (nsStyleStruct*&)colPosition);
// 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))
{
// 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);
if (gsDebug==PR_TRUE)
printf (" spanlist min: %d of %d\n", spanCellMinWidth, spanInfo->effectiveMaxWidthOfSpannedCols);
if (minColWidth < spanCellMinWidth)
{
minColWidth = spanCellMinWidth; // set the new min width for the col
if (gsDebug==PR_TRUE)
printf (" 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);
if (gsDebug)
printf (" and maxColWidth = %d\n", maxColWidth);
}
}
else
{
spanCellMinWidth = spanInfo->cellMinWidth/spanInfo->initialColSpan;
if (minColWidth < spanCellMinWidth)
{
minColWidth = spanCellMinWidth;
if (gsDebug==PR_TRUE)
printf (" 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);
if (gsDebug)
printf (" 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->GetEffectiveMinColWidth()) /
(spanInfo->effectiveMaxWidthOfSpannedCols);
if (gsDebug==PR_TRUE)
printf (" 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
if (gsDebug==PR_TRUE)
printf (" 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);
if (gsDebug==PR_TRUE)
printf (" 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))
{
for (rowIndex = 0; rowIndex<numRows; rowIndex++)
{ // this col has proportional width, so determine its width requirements
nsTableCellFrame * cellFrame = mTableFrame->GetCellAt(rowIndex, colIndex);
if (nsnull==cellFrame)
{ // there is no cell in this row that corresponds to this column
continue;
}
if (-1==firstRowIndex)
firstRowIndex = rowIndex;
if (rowIndex!=cellFrame->GetRowIndex()) {
// 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;
}
if (colIndex!=cellFrame->GetColIndex()) {
// 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);
if (gsDebug) printf("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)
{
if (gsDebug) printf("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);
if (gsDebug) printf("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)
{
if (gsDebug) printf("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
if (cellFrame->GetColIndex()==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);
}
}
if (PR_TRUE==gsDebug)
printf("factoring in cell %d with colSpan=%d\n factoring in min=%d and desired=%d\n",
rowIndex, colSpan, cellMinWidth, cellDesiredWidth);
if (maxColWidth < cellDesiredWidth)
maxColWidth = cellDesiredWidth;
if (gsDebug==PR_TRUE)
printf (" after cell %d, minColWidth=%d maxColWidth=%d effColWidth[%d]=%d\n",
rowIndex, minColWidth, maxColWidth,
colIndex, colFrame->GetEffectiveMaxColWidth());
} // end looping through cells in the column
if (gsDebug==PR_TRUE)
{
printf (" for determining width of col %d %s:\n",
colIndex, !IsFixedWidth(colPosition)? "(P)":"(A)");
printf (" minColWidth = %d and maxColWidth = %d\n", minColWidth, maxColWidth);
printf (" 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();
if (gsDebug) printf("column %d has specified percent width = %f\n", colIndex, specifiedPercentageColWidth);
break;
case eStyleUnit_Proportional:
specifiedProportionColumnWidth = colPosition->mWidth.GetIntValue();
if (gsDebug) printf("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);
if (gsDebug==PR_TRUE)
printf (" 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))
{ // 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);
if (gsDebug==PR_TRUE)
printf (" 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
if (gsDebug==PR_TRUE)
printf (" 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);
if (gsDebug==PR_TRUE)
printf (" 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);
if (gsDebug==PR_TRUE)
printf (" 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);
if (PR_TRUE==gsDebug) printf(" 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
mTableFrame->SetColumnWidth(colIndex, colFrame->GetMaxColWidth());
widthOfFixedTableColumns += colFrame->GetMaxColWidth() + colInset;
}
tableWidth += mTableFrame->GetColumnWidth(colIndex) + 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)
{
if (PR_TRUE==gsDebug)
printf("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)
sumOfPercentColumns=1.0f; // values greater than 100% are meaningless
widthOfPercentCells += mTableFrame->GetColumnWidth(colIndex);
}
else
{
widthOfOtherCells += mTableFrame->GetColumnWidth(colIndex);
}
}
if (0==widthOfOtherCells)
widthOfOtherCells=aMaxWidth;
if (PR_TRUE==gsDebug)
printf(" 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)));
if (PR_TRUE==gsDebug)
printf(" 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
if (PR_TRUE==gsDebug)
printf(" 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);
if (PR_TRUE==gsDebug)
printf(" 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);
if (PR_TRUE==gsDebug)
printf(" 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));
if (PR_TRUE==gsDebug)
printf(" col %d was %d set to \n",
colIndex, mTableFrame->GetColumnWidth(colIndex), newWidth);
mTableFrame->SetColumnWidth(colIndex, newWidth);
excess -= excessPerColumn;
}
// handle division underflow
if (0<excess)
{
if (PR_TRUE==gsDebug)
printf(" 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);
}
if (PR_TRUE==gsDebug)
printf(" 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));
nscoord computedColWidth = info->mProportion*widthPerSlice;
mTableFrame->SetColumnWidth(info->mColIndex, computedColWidth);
if (gsDebug==PR_TRUE)
printf (" 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));
if (maxOfMaxColWidths < info->mMaxColWidth)
maxOfMaxColWidths = info->mMaxColWidth;
}
for (i=0; i<numSpecifiedProportionalColumns; i++)
{
ProportionalColumnLayoutStruct * info =
(ProportionalColumnLayoutStruct *)(proportionalColumnsList->ElementAt(i));
mTableFrame->SetColumnWidth(info->mColIndex, maxOfMaxColWidths);
if (gsDebug==PR_TRUE)
printf (" 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, 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)
{
NS_ASSERTION(0==spanList->Count(), "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;
if (PR_TRUE==gsDebug) printf ("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;
mTableFrame->GetColumnsByType(eStyleUnit_Auto, numAutoColumns, autoColumns);
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;
if (gsDebug==PR_TRUE)
printf(" aAvailWidth specified as %d, expanding columns by excess = %d\n", aAvailWidth, excess);
// 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???
excess = aAvailWidth - widthMinusFixedColumns;
// 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->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);
nscoord colWidth = excessForThisColumn+oldColWidth;
if (gsDebug==PR_TRUE)
printf(" distribute excess to auto columns: column %d was %d, now set to %d\n",
colIndex, oldColWidth, colWidth);
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
}
// 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;
if (gsDebug==PR_TRUE)
printf(" aAvailWidth specified as %d, expanding columns by excess = %d\n",
aAvailWidth, excess);
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)(excess*percent);
nscoord colWidth = excessForThisColumn+oldColWidth;
if (gsDebug==PR_TRUE)
printf(" distribute excess to all columns: column %d was %d, now set to %d from % = %f\n",
colIndex, oldColWidth, colWidth, percent);
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
}
}
/* assign columns widths for a table whose max size doesn't fit in the available space
*/
PRBool BasicTableLayoutStrategy::BalanceColumnsConstrained( const nsReflowState& aReflowState,
nscoord aAvailWidth,
nscoord aMaxWidth,
PRBool aTableIsAutoWidth)
{
#ifdef 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->GetCellSpacing();
for (PRInt32 colIndex = 0; colIndex<mNumCols; colIndex++)
{
if (gsDebug==PR_TRUE) printf (" 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, (nsStyleStruct*&)colPosition);
// 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))
{
// 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);
if (gsDebug==PR_TRUE)
printf (" spanlist min: %d of %d\n", spanCellMinWidth, spanInfo->effectiveMaxWidthOfSpannedCols);
if (minColWidth < spanCellMinWidth)
{
minColWidth = spanCellMinWidth; // set the new min width for the col
if (gsDebug==PR_TRUE)
printf (" for spanning cell into col %d with remaining span=%d, new min = %d\n",
colIndex, spanInfo->span, minColWidth);
maxColWidth = PR_MAX(maxColWidth, minColWidth);
if (gsDebug)
printf (" maxColWidth = %d\n", maxColWidth);
}
}
else
{
spanCellMinWidth = spanInfo->cellMinWidth/spanInfo->initialColSpan;
if (minColWidth < spanCellMinWidth)
{
minColWidth = spanCellMinWidth;
if (gsDebug==PR_TRUE)
printf (" for spanning cell into col %d with remaining span=%d, new min = %d\n",
colIndex, spanInfo->span, minColWidth);
maxColWidth = PR_MAX(maxColWidth, minColWidth);
if (gsDebug)
printf (" 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);
if (gsDebug==PR_TRUE)
printf (" 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
if (gsDebug==PR_TRUE)
printf (" 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);
if (gsDebug==PR_TRUE)
printf (" 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))
{
for (rowIndex = 0; rowIndex<numRows; rowIndex++)
{
nsTableCellFrame * cellFrame = mTableFrame->GetCellAt(rowIndex, colIndex);
if (nsnull==cellFrame)
{ // there is no cell in this row that corresponds to this column
continue;
}
if (rowIndex!=cellFrame->GetRowIndex()) {
// 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;
}
if (colIndex!=cellFrame->GetColIndex()) {
// 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();
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);
if (gsDebug) printf("specified percent width %f of %d = %d\n",
percent, aMaxWidth, specifiedCellWidth);
}
if (-1!=specifiedCellWidth)
{
if (specifiedCellWidth>cellMinWidth)
{
if (gsDebug) printf("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);
if (gsDebug) printf("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)
{
if (gsDebug) printf("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
if (cellFrame->GetColIndex()==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);
}
}
if (PR_TRUE==gsDebug)
printf("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
if (minColWidth < cellMinWidth)
minColWidth = cellMinWidth;
// remember the max desired cell width
if (maxColWidth < cellDesiredWidth)
maxColWidth = cellDesiredWidth;
// effectiveMaxColumnWidth is the width as if no cells with colspans existed
// if ((1==colSpan) && (colFrame->GetEffectiveMaxColWidth() < maxColWidth))
// colFrame->SetEffectiveMaxColWidth(cellDesiredWidth);
if (gsDebug==PR_TRUE)
printf (" after cell %d, minColWidth=%d maxColWidth=%d effColWidth[%d]=%d,%d\n",
rowIndex, minColWidth, maxColWidth,
colIndex, colFrame->GetEffectiveMinColWidth(), colFrame->GetEffectiveMaxColWidth());
}
if (gsDebug==PR_TRUE)
{
printf (" for determining width of col %d %s:\n",
colIndex, !IsFixedWidth(colPosition)? "(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();
if (gsDebug) printf("column %d has specified percent width = %f\n", colIndex, specifiedPercentageColWidth);
break;
case eStyleUnit_Proportional:
specifiedProportionColumnWidth = colPosition->mWidth.GetIntValue();
if (gsDebug) printf("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);
if (gsDebug==PR_TRUE)
printf (" 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
if (gsDebug==PR_TRUE) printf (" 4 one-column: col %d set to width = %d\n", colIndex, aAvailWidth);
mTableFrame->SetColumnWidth(colIndex, aAvailWidth);
if (gsDebug==PR_TRUE)
printf (" 4 one-col: col %d set to width = %d from available width %d\n",
colIndex, mTableFrame->GetColumnWidth(colIndex), aAvailWidth);
}
else if (PR_TRUE==isAutoWidth)
{ // column's width is determined by its content, done in post-processing
mTableFrame->SetColumnWidth(colIndex, 0); // set to 0 width for now
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);
if (gsDebug==PR_TRUE)
printf (" 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);
if (gsDebug==PR_TRUE)
printf (" 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);
if (PR_TRUE==gsDebug) printf(" enlarging column to it's minimum = %d\n", minColWidth);
if (maxOfAllMinColWidths < minColWidth)
{
maxOfAllMinColWidths = minColWidth;
if (PR_TRUE==gsDebug)
printf(" and setting maxOfAllMins to %d\n", maxOfAllMinColWidths);
}
}
}
}
}
else
{
mTableFrame->SetColumnWidth(colIndex, colFrame->GetMaxColWidth());
}
tableWidth += mTableFrame->GetColumnWidth(colIndex) + colInset;
}
/* --- post-process if necessary --- */
// first, assign autoWidth columns a width
if (PR_TRUE==atLeastOneAutoWidthColumn)
{ // proportionately distribute the remaining space to autowidth columns
DistributeRemainingSpace(aMaxWidth, tableWidth, aTableIsAutoWidth);
}
// second, fix up tables where column width attributes give us a table that is too wide or too narrow
// 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)
{ // 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)
{
if (gsDebug==PR_TRUE)
printf(" 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
{
nscoord computedColWidth = info->mProportion*widthPerSlice;
mTableFrame->SetColumnWidth(info->mColIndex, computedColWidth);
if (gsDebug==PR_TRUE)
printf (" 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)
{
NS_ASSERTION(0==spanList->Count(), "space leak, span list not empty");
delete spanList;
}
return result;
}
// 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)
{
if (PR_TRUE==gsDebug)
printf ("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)
{
// 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->GetColFrame(autoColumns[i]);
nscoord maxEffectiveColWidth = colFrame->GetEffectiveMaxColWidth();
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;
if (gsDebug==PR_TRUE)
printf(" 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);
// if we actually have room to distribute, do it here
// otherwise, the auto columns will remain 0-width until expanded to their minimum in EnsureCellMinWidths
if (0<availWidth)
{
float percent;
if (0!=aTableSpecifiedWidth)
percent = ((float)(colFrame->GetEffectiveMaxColWidth()))/((float)totalEffectiveWidthOfAutoColumns);
else
percent = ((float)1)/((float)numAutoColumns);
nscoord colWidth = (nscoord)(availWidth*percent);
// 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()); // XXX can this legally be 0?
}
if (gsDebug==PR_TRUE)
printf(" distribute width to auto columns: column %d was %d, now set to %d\n",
colIndex, colFrame->GetEffectiveMaxColWidth(), colWidth);
mTableFrame->SetColumnWidth(colIndex, colWidth);
}
}
if (PR_TRUE==gsDebug)
{
nscoord tableWidth=0;
printf("before EnsureCellMinWidth: ");
for (PRInt32 i=0; i<mNumCols; i++)
{
tableWidth += mTableFrame->GetColumnWidth(i);
printf(" %d ", mTableFrame->GetColumnWidth(i));
}
printf ("\n computed table width is %d\n",tableWidth);
}
EnsureCellMinWidths(PR_FALSE);
}
if (PR_TRUE==gsDebug)
{
nscoord tableWidth=0;
printf("after EnsureCellMinWidth: ");
for (PRInt32 i=0; i<mNumCols; i++)
{
tableWidth += mTableFrame->GetColumnWidth(i);
printf(" %d ", mTableFrame->GetColumnWidth(i));
}
printf ("\n computed table width is %d\n",tableWidth);
}
}
void BasicTableLayoutStrategy::EnsureCellMinWidths(PRBool aShrinkFixedWidthCells)
{
PRBool atLeastOne = PR_TRUE;
PRBool *colsToRemoveFrom = new PRBool[mNumCols];
for (PRInt32 i=0; i<mNumCols; i++)
colsToRemoveFrom[i] = PR_TRUE;
if (PR_FALSE==aShrinkFixedWidthCells)
{
PRInt32 numFixedColumns=0;
PRInt32 *fixedColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Coord, numFixedColumns, fixedColumns);
for (PRInt32 i=0; i<numFixedColumns; i++)
colsToRemoveFrom[fixedColumns[i]]=PR_FALSE;
}
while (PR_TRUE==atLeastOne)
{
atLeastOne=PR_FALSE;
PRInt32 colIndex;
nscoord addedWidth = 0;
// first, bump up cells that are below their min to their min width
for (colIndex=0; colIndex<mNumCols; colIndex++)
{
nsTableColFrame *colFrame = mTableFrame->GetColFrame(colIndex);
nscoord minColWidth = colFrame->GetMinColWidth();
nscoord colWidth = mTableFrame->GetColumnWidth(colIndex);
if (colWidth<minColWidth)
{
addedWidth += (minColWidth-colWidth);
mTableFrame->SetColumnWidth(colIndex, minColWidth);
atLeastOne=PR_TRUE;
}
}
// second, remove the added space from cells that can afford to slim down
//QQQ boy is this slow! there has to be a faster way that is still guaranteed to be accurate...
while ((addedWidth>0))
{ // while we still have some extra space, and last time we were able to take some off...
PRInt32 startingAddedWidth = addedWidth;
for (colIndex=0; colIndex<mNumCols; colIndex++)
{
nsTableColFrame *colFrame = mTableFrame->GetColFrame(colIndex);
nscoord minColWidth = colFrame->GetMinColWidth();
nscoord colWidth = mTableFrame->GetColumnWidth(colIndex);
if ((colWidth>minColWidth) && (PR_TRUE==colsToRemoveFrom[colIndex]))
{
mTableFrame->SetColumnWidth(colIndex, colWidth-1);
addedWidth--;
if (0==addedWidth)
{ // we're run out of extra space
break; // for (colIndex=0; colIndex<mNumCols; colIndex++)
}
}
}
if (startingAddedWidth==addedWidth)
{ // we we unable to find any columns to remove space from
PRBool okToContinue=PR_FALSE;
for (PRInt32 i=0; i<mNumCols; i++)
{
if (PR_FALSE==colsToRemoveFrom[i])
{
colsToRemoveFrom[i] = PR_TRUE;
okToContinue=PR_TRUE;
}
}
if (PR_FALSE==okToContinue)
break; // while ((addedWidth>0))
}
}
if (0<addedWidth)
{ // all our cells are at their min width, so no use doing anything else
break; // while (PR_TRUE==atLeastOne)
}
}
delete [] colsToRemoveFrom;
}
void BasicTableLayoutStrategy::AdjustTableThatIsTooWide(nscoord aComputedWidth,
nscoord aTableWidth, PRBool aShrinkFixedCols)
{
if (PR_TRUE==gsDebug)
{
nscoord tableWidth=0;
printf("before AdjustTableThatIsTooWide: ");
for (PRInt32 i=0; i<mNumCols; i++)
{
tableWidth += mTableFrame->GetColumnWidth(i);
printf(" %d ", mTableFrame->GetColumnWidth(i));
}
printf ("\n computed table width is %d\n",tableWidth);
}
PRInt32 numFixedColumns=0;
PRInt32 *fixedColumns=nsnull;
mTableFrame->GetColumnsByType(eStyleUnit_Coord, numFixedColumns, fixedColumns);
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 take remove width from
PRInt32 numColsToShrink = 0;
for (colIndex=0; colIndex<mNumCols; colIndex++)
{
nscoord currentColWidth = mTableFrame->GetColumnWidth(colIndex);
nsTableColFrame *colFrame;
mTableFrame->GetColumnFrame(colIndex, colFrame);
nscoord minColWidth = colFrame->GetMinColWidth();
if (currentColWidth==minColWidth)
continue;
if ((PR_FALSE==aShrinkFixedCols) &&
(PR_TRUE==IsColumnInList(colIndex, fixedColumns, numFixedColumns)))
continue;
colsToShrink[numColsToShrink] = colIndex;
numColsToShrink++;
nscoord diff = currentColWidth - minColWidth;
if ((0==minDiff) || (diff<minDiff))
minDiff = diff;
}
// 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)
if (PR_TRUE==gsDebug)
{
nscoord tableWidth=0;
printf("after AdjustTableThatIsTooWide: ");
for (PRInt32 i=0; i<mNumCols; i++)
{
tableWidth += mTableFrame->GetColumnWidth(i);
printf(" %d ", mTableFrame->GetColumnWidth(i));
}
printf ("\n computed table width is %d with aShrinkFixedCols = %s\n",
tableWidth, aShrinkFixedCols ? "TRUE" : "FALSE");
}
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)
{
if (PR_TRUE==gsDebug)
{
nscoord tableWidth=0;
printf("before AdjustTableThatIsTooNarrow: ");
for (PRInt32 i=0; i<mNumCols; i++)
{
tableWidth += mTableFrame->GetColumnWidth(i);
printf(" %d ", mTableFrame->GetColumnWidth(i));
}
printf ("\n computed table width is %d\n",tableWidth);
}
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)
if (PR_TRUE==gsDebug)
{
nscoord tableWidth=0;
printf("after AdjustTableThatIsTooNarrow: ");
for (PRInt32 i=0; i<mNumCols; i++)
{
tableWidth += mTableFrame->GetColumnWidth(i);
printf(" %d ", mTableFrame->GetColumnWidth(i));
}
printf ("\n computed table width is %d\n",tableWidth);
}
}
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, (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;
}
return result;
}
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