/* -*- 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 PRBool gsDebugAssign = PR_FALSE; static PRBool gsDebugBalance = PR_FALSE; PRBool CanAllocate(PRInt32 aTypeToAllocate, PRInt32 aTypeAlreadyAllocated, nsTableColFrame* aColFrame) { if ((aTypeToAllocate == FIX_ADJ) && (aTypeAlreadyAllocated == FIX)) { return PR_TRUE; } if ((aTypeToAllocate == DES_CON) && (aTypeAlreadyAllocated == FIX_ADJ)) { return PR_TRUE; } if ((aTypeToAllocate == DES_CON) && (aTypeAlreadyAllocated == FIX) && (aColFrame->GetWidth(DES_ADJ) > aColFrame->GetWidth(DES_CON))) { return PR_TRUE; } return PR_FALSE; } /* ---------- 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, PRBool aIsNavQuirks) { NS_ASSERTION(nsnull != aFrame, "bad frame arg"); mTableFrame = aFrame; mMinTableContentWidth = 0; mMaxTableContentWidth = 0; mCellSpacingTotal = 0; mIsNavQuirksMode = aIsNavQuirks; } BasicTableLayoutStrategy::~BasicTableLayoutStrategy() { } PRBool BasicTableLayoutStrategy::Initialize(nsSize* aMaxElementSize, PRInt32 aNumCols, nscoord aMaxWidth) { ContinuingFrameCheck(); PRBool result = PR_TRUE; // re-init instance variables mNumCols = aNumCols; mMinTableContentWidth = 0; mMaxTableContentWidth = 0; mCellSpacingTotal = 0; mCols = mTableFrame->GetEffectiveCOLSAttribute(); // assign the width of all fixed-width columns AssignPreliminaryColumnWidths(aMaxWidth); // 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; nscoord horBorderPadding = borderPadding.left + borderPadding.right; if (tablePosition->mWidth.GetUnit() == eStyleUnit_Coord) { aMaxElementSize->width = tablePosition->mWidth.GetCoordValue(); if (mMinTableContentWidth + horBorderPadding > aMaxElementSize->width) { aMaxElementSize->width = mMinTableContentWidth + horBorderPadding; } } else { aMaxElementSize->width = mMinTableContentWidth + horBorderPadding; } } } void BasicTableLayoutStrategy::ContinuingFrameCheck() { #ifdef NS_DEBUG nsIFrame* tablePIF = nsnull; mTableFrame->GetPrevInFlow(&tablePIF); NS_ASSERTION(!tablePIF, "never ever call me on a continuing frame!"); #endif } PRBool BCW_Wrapup(BasicTableLayoutStrategy* aStrategy, nsTableFrame* aTableFrame, PRInt32* aAllocTypes) { if (aAllocTypes) delete [] aAllocTypes; if (gsDebugBalance) {printf("BalanceColumnWidths ex \n"); aTableFrame->Dump(PR_TRUE, PR_FALSE);} return PR_TRUE; } // The priority of allocations for a given column are as follows // 1) max(MIN, MIN_ADJ) // 2) max (PCT, PCT_ADJ) go to 7 // 3) FIX // 4) FIX_ADJ, if FIX was not set do DES_CON, go to 7 // 5) PROportional go to 7 // 6) max(DES_CON, DES_ADJ) // 7) for a fixed width table, the column may get more // space if the sum of the col allocations is insufficient PRBool BasicTableLayoutStrategy::BalanceColumnWidths(nsIStyleContext* aTableStyle, const nsHTMLReflowState& aReflowState, nscoord aMaxWidthIn) { if (gsDebugBalance) {printf("BalanceColumnWidths en max=%d\n", aMaxWidthIn); mTableFrame->Dump(PR_TRUE, PR_FALSE);} ContinuingFrameCheck(); if (!aTableStyle) { NS_ASSERTION(aTableStyle, "bad style arg"); return PR_FALSE; } // determine if the table is auto/fixed and get the fixed width if available nscoord maxWidth = aMaxWidthIn; nscoord specifiedTableWidth = 0; PRBool tableIsAutoWidth = mTableFrame->IsAutoWidth(aReflowState, specifiedTableWidth); // a specifiedTableWidth of <= 0 indicates percentage based if (!tableIsAutoWidth && (specifiedTableWidth > 0)) { maxWidth = PR_MIN(specifiedTableWidth, aMaxWidthIn); // specifiedWidth usually == aMaxWidthIn for fixed table } // reduce the maxWidth by border and padding, since we will be dealing with content width // XXX should this be done in aMaxWidthIn by the caller? if (maxWidth != NS_UNCONSTRAINEDSIZE) { const nsStyleSpacing* spacing; mTableFrame->GetStyleData(eStyleStruct_Spacing, (const nsStyleStruct *&)spacing); nsMargin borderPadding; spacing->CalcBorderPaddingFor(mTableFrame, borderPadding); maxWidth -= borderPadding.left + borderPadding.right; maxWidth = PR_MAX(0, maxWidth); } // initialize the col percent and cell percent values to 0. PRInt32 colX; for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); colFrame->SetWidth(PCT, WIDTH_NOT_SET); colFrame->SetWidth(PCT_ADJ, WIDTH_NOT_SET); } // set PCT and PCT_ADJ widths on col frames and for an auto table return // a new table width based on percent cells/cols if they exist nscoord perAdjTableWidth = (maxWidth != NS_UNCONSTRAINEDSIZE) ? AssignPercentageColumnWidths(maxWidth - mCellSpacingTotal, tableIsAutoWidth) : 0; PRBool recomputedAdjMin = RecomputeAdjMinIfNecessary(); // set the table's columns to the min width for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord colMinWidth = colFrame->GetMinWidth(); mTableFrame->SetColumnWidth(colX, colMinWidth); } if (recomputedAdjMin) { SetMinAndMaxTableContentWidths(); } // if the max width available is less than the min content width for fixed table, we're done if (!tableIsAutoWidth && (maxWidth < mMinTableContentWidth)) { return BCW_Wrapup(this, mTableFrame, nsnull); } // if the max width available is less than the min content width for auto table // that had no % cells/cols, we're done if (tableIsAutoWidth && (maxWidth < mMinTableContentWidth) & (0 == perAdjTableWidth)) { return BCW_Wrapup(this, mTableFrame, nsnull); } PRInt32 cellSpacingTotal; // the following are of size NUM_WIDTHS, but only MIN_CON, DES_CON, FIX, PCT // are used and they account for colspan ADJusted values PRInt32 totalWidths[NUM_WIDTHS]; // sum of col widths of a particular type PRInt32 totalAvailWidths[NUM_WIDTHS]; PRInt32 totalCounts[NUM_WIDTHS]; // num of cols of a particular type PRInt32 minWidths[NUM_WIDTHS]; PRInt32 num0Proportional; CalculateTotals(cellSpacingTotal, totalCounts, totalWidths, totalAvailWidths, minWidths, num0Proportional); // auto width table's adjusted width needs cell spacing if (tableIsAutoWidth && perAdjTableWidth > 0) { perAdjTableWidth = PR_MIN(perAdjTableWidth + cellSpacingTotal, maxWidth); } nscoord totalAllocated = totalWidths[MIN_CON] + cellSpacingTotal; // allocate and initialize arrays indicating what col gets set PRInt32* allocTypes = new PRInt32[mNumCols]; if (!allocTypes) return PR_FALSE; for (colX = 0; colX < mNumCols; colX++) { allocTypes[colX] = -1; } // allocate percentage cols if (totalCounts[PCT] > 0) { if (totalAllocated + totalAvailWidths[PCT] - minWidths[PCT] <= maxWidth) { AllocateFully(totalAllocated, allocTypes, PCT); NS_ASSERTION(totalAllocated <= maxWidth, "over allocated"); } else { AllocateConstrained(maxWidth - totalAllocated, PCT, PR_FALSE, allocTypes); return BCW_Wrapup(this, mTableFrame, allocTypes); } } // allocate fixed cols if (totalAllocated < maxWidth && totalCounts[FIX] > 0) { if (totalAllocated + totalAvailWidths[FIX] - minWidths[FIX] <= maxWidth) { AllocateFully(totalAllocated, allocTypes, FIX); NS_ASSERTION(totalAllocated <= maxWidth, "over allocated"); } else { AllocateConstrained(maxWidth - totalAllocated, FIX, PR_TRUE, allocTypes); return BCW_Wrapup(this, mTableFrame, allocTypes); } } // allocate fixed adjusted cols if (totalAllocated < maxWidth && totalCounts[FIX_ADJ] > 0) { if (totalAllocated + totalAvailWidths[FIX_ADJ] - minWidths[FIX_ADJ] <= maxWidth) { AllocateFully(totalAllocated, allocTypes, FIX_ADJ); NS_ASSERTION(totalAllocated <= maxWidth, "over allocated"); } else { AllocateConstrained(maxWidth - totalAllocated, FIX_ADJ, PR_TRUE, allocTypes); return BCW_Wrapup(this, mTableFrame, allocTypes); } } // allocate proportional cols up to their min proportional value if (totalAllocated < maxWidth && totalCounts[MIN_PRO] > 0) { if (totalAllocated + totalAvailWidths[MIN_PRO] - minWidths[MIN_PRO] <= maxWidth) { AllocateFully(totalAllocated, allocTypes, MIN_PRO, PR_FALSE); NS_ASSERTION(totalAllocated <= maxWidth, "over allocated"); } else { AllocateConstrained(maxWidth - totalAllocated, MIN_PRO, PR_FALSE, allocTypes); return BCW_Wrapup(this, mTableFrame, allocTypes); } } // allocate auto cols, considering even those that are proportional if (totalAllocated < maxWidth && totalCounts[DES_CON] > 0) { if (totalAllocated + totalAvailWidths[DES_CON] - minWidths[DES_CON]<= maxWidth) { AllocateFully(totalAllocated, allocTypes, DES_CON); NS_ASSERTION(totalAllocated <= maxWidth, "over allocated"); } else { AllocateConstrained(maxWidth - totalAllocated, DES_CON, PR_FALSE, allocTypes); return BCW_Wrapup(this, mTableFrame, allocTypes); } } // if this is a nested table and pass1 reflow, we are done if (maxWidth == NS_UNCONSTRAINEDSIZE) { return BCW_Wrapup(this, mTableFrame, allocTypes); } // allocate the rest unconstrained PRBool skip0Proportional = totalCounts[DES_CON] > num0Proportional; if ( (tableIsAutoWidth && (perAdjTableWidth - totalAllocated > 0)) || (!tableIsAutoWidth && (totalAllocated < maxWidth)) ) { if (totalCounts[PCT] != mNumCols) { //PRBool onlyAuto = (totalCounts[DES_CON] > 0) && !mIsNavQuirksMode; for (colX = 0; colX < mNumCols; colX++) { if (PCT == allocTypes[colX]) { allocTypes[colX] = -1; } //else if ((FIX == allocTypes[colX]) && onlyAuto) { // allocTypes[colX] = -1; //} } } if (tableIsAutoWidth) { AllocateUnconstrained(perAdjTableWidth - totalAllocated, allocTypes, skip0Proportional); } else { AllocateUnconstrained(maxWidth - totalAllocated, allocTypes, skip0Proportional); } } // give the proportional cols the rest up to the max width in quirks mode else if (tableIsAutoWidth && mIsNavQuirksMode && (totalCounts[MIN_PRO] > 0)) { for (colX = 0; colX < mNumCols; colX++) { if (DES_CON != allocTypes[colX]) { allocTypes[colX] = -1; } } AllocateUnconstrained(maxWidth - totalAllocated, allocTypes, skip0Proportional); } return BCW_Wrapup(this, mTableFrame, allocTypes); } // Allocate aWidthType values to all cols available in aIsAllocated void BasicTableLayoutStrategy::AllocateFully(nscoord& aTotalAllocated, PRInt32* aAllocTypes, PRInt32 aWidthType, PRBool aMarkAllocated) { for (PRInt32 colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord oldWidth = mTableFrame->GetColumnWidth(colX); nscoord newWidth = colFrame->GetWidth(aWidthType); if (-1 != aAllocTypes[colX]) { if (!CanAllocate(aWidthType, aAllocTypes[colX], colFrame)) { continue; } } // account for col span overrides with DES_CON and FIX if (DES_CON == aWidthType) { newWidth = PR_MAX(newWidth, colFrame->GetWidth(DES_ADJ)); } else if (PCT == aWidthType) { newWidth = PR_MAX(newWidth, colFrame->GetWidth(PCT_ADJ)); } if (WIDTH_NOT_SET == newWidth) { continue; } if (newWidth > oldWidth) { mTableFrame->SetColumnWidth(colX, newWidth); aTotalAllocated += newWidth - oldWidth; } if (aMarkAllocated) { aAllocTypes[colX] = aWidthType; } } } void BasicTableLayoutStrategy::AllocateUnconstrained(PRInt32 aAllocAmount, PRInt32* aAllocTypes, PRBool aSkip0Proportional) { nscoord divisor = 0; PRInt32 numAvail = 0; PRInt32 colX; for (colX = 0; colX < mNumCols; colX++) { if (-1 != aAllocTypes[colX]) { divisor += mTableFrame->GetColumnWidth(colX); numAvail++; } } for (colX = 0; colX < mNumCols; colX++) { if (-1 != aAllocTypes[colX]) { if (aSkip0Proportional) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); if (e0ProportionConstraint == colFrame->GetConstraint()) { continue; } } nscoord oldWidth = mTableFrame->GetColumnWidth(colX); float percent = (divisor == 0) ? (1.0f / ((float)numAvail)) : ((float)oldWidth) / ((float)divisor); nscoord addition = NSToCoordRound(((float)aAllocAmount) * percent); mTableFrame->SetColumnWidth(colX, oldWidth + addition); } } } // Determine min, desired, fixed, and proportional sizes for the cols and // and calculate min/max table width PRBool BasicTableLayoutStrategy::AssignPreliminaryColumnWidths(nscoord aMaxWidth) { if (gsDebugAssign) {printf("AssignPrelimColWidths en max=%d\n", aMaxWidth); mTableFrame->Dump(PR_TRUE, PR_FALSE);} PRBool rv = PR_FALSE; PRInt32 numRows = mTableFrame->GetRowCount(); nscoord spacingX = mTableFrame->GetCellSpacingX(); PRInt32 colX, rowX; mCellSpacingTotal = 0; PRInt32 propTotal = 0; // total of numbers of the type 1*, 2*, etc PRInt32 numColsForColsAttr = 0; // Nav Quirks cols attribute for equal width cols if (NS_STYLE_TABLE_COLS_NONE != mCols) { numColsForColsAttr = (NS_STYLE_TABLE_COLS_ALL == mCols) ? mNumCols : mCols; } // For every column, determine it's min and desired width based on cell style // base on cells which do not span cols. Also, determine mCellSpacingTotal for (colX = 0; colX < mNumCols; colX++) { nscoord minWidth = 0; nscoord desWidth = 0; nscoord fixWidth = WIDTH_NOT_SET; // Get column frame and reset it nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); NS_ASSERTION(nsnull != colFrame, "bad col frame"); colFrame->ResetSizingInfo(); if (mTableFrame->GetNumCellsOriginatingInCol(colX) > 0) { mCellSpacingTotal += spacingX; } // Scan the cells in the col that have colspan = 1 and find the maximum // min, desired, and fixed cells. nsTableCellFrame* fixContributor = nsnull; for (rowX = 0; rowX < numRows; rowX++) { PRBool originates; PRInt32 colSpan; nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan); // skip cells that don't originate at (rowX, colX); colspans are handled in the // next pass, row spans don't need to be handled if (!cellFrame || !originates || (colSpan > 1)) { continue; } // these values include borders and padding minWidth = PR_MAX(minWidth, cellFrame->GetPass1MaxElementSize().width); desWidth = PR_MAX(desWidth, cellFrame->GetPass1DesiredSize().width); // see if the cell has a style width specified const nsStylePosition* cellPosition; cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)cellPosition); if (eStyleUnit_Coord == cellPosition->mWidth.GetUnit()) { nscoord coordValue = cellPosition->mWidth.GetCoordValue(); if (coordValue > 0) { // ignore if width == 0 // need to add padding into fixed width const nsStyleSpacing* spacing; cellFrame->GetStyleData(eStyleStruct_Spacing,(const nsStyleStruct *&)spacing); nsMargin paddingMargin; spacing->CalcPaddingFor(cellFrame, paddingMargin); nscoord newFixWidth = coordValue + paddingMargin.left + paddingMargin.right; if (newFixWidth > fixWidth) { fixWidth = newFixWidth; fixContributor = cellFrame; } fixWidth = PR_MAX(fixWidth, minWidth); } } } desWidth = PR_MAX(desWidth, minWidth); // cache the computed column info colFrame->SetWidth(MIN_CON, minWidth); colFrame->SetWidth(DES_CON, desWidth); colFrame->SetConstrainingCell(fixContributor); if (fixWidth > 0) { colFrame->SetWidth(FIX, PR_MAX(fixWidth, minWidth)); } // determine if there is a proportional column either from html4 // proportional width on a col or Nav Quirks cols attr if (fixWidth <= 0) { nscoord proportion = WIDTH_NOT_SET; const nsStylePosition* colPosition; colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)colPosition); if (eStyleUnit_Proportional == colPosition->mWidth.GetUnit()) { proportion = colPosition->mWidth.GetIntValue(); } else if (colX < numColsForColsAttr) { proportion = 1; if ((eStyleUnit_Percent == colPosition->mWidth.GetUnit()) && (colPosition->mWidth.GetPercentValue() > 0.0f)) { proportion = WIDTH_NOT_SET; } } if (proportion >= 0) { colFrame->SetWidth(MIN_PRO, proportion); if (proportion > 0) { propTotal += proportion; colFrame->SetConstraint(eProportionConstraint); } else { colFrame->SetConstraint(e0ProportionConstraint); // override the desired, proportional widths nscoord colMinWidth = colFrame->GetWidth(MIN_CON); colFrame->SetWidth(DES_CON, colMinWidth); colFrame->SetWidth(MIN_PRO, colMinWidth); } } } } if (mCellSpacingTotal > 0) { mCellSpacingTotal += spacingX; // add last cell spacing on right } // figure the proportional width for porportional cols if (propTotal > 0) { nscoord minPropTotal = 0; nscoord desPropTotal = 0; // figure the totals of all proportional cols which support every min and desired width for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord colProp = colFrame->GetWidth(MIN_PRO); if (colProp > 0) { nscoord minWidth = colFrame->GetWidth(MIN_CON); nscoord desWidth = colFrame->GetWidth(DES_CON); minPropTotal = PR_MAX(minPropTotal, NSToCoordRound(((float)propTotal * minWidth) / (float)colProp)); desPropTotal = PR_MAX(desPropTotal, NSToCoordRound(((float)propTotal * desWidth) / (float)colProp)); } } // store a ratio to allow going from a min to a desired proportional width if (minPropTotal > 0) { mMinToDesProportionRatio = ((float)desPropTotal) / ((float)minPropTotal); } // figure the cols proportional min width based on the new totals for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord colProp = colFrame->GetWidth(MIN_PRO); if (colProp > 0) { nscoord minProp = NSToCoordRound(((float)colProp * minPropTotal) / (float)propTotal); colFrame->SetWidth(MIN_PRO, minProp); colFrame->SetWidth(DES_CON, NSToCoordRound(((float)minProp) * mMinToDesProportionRatio)); } } } // For each col, consider the cells originating in it with colspans > 1. // Adjust the cols that each cell spans if necessary. Iterate backwards // so that nested and/or overlaping col spans handle the inner ones first, // ensuring more accurated calculations. for (colX = mNumCols - 1; colX >= 0; colX--) { for (PRInt32 rowX = 0; rowX < numRows; rowX++) { PRBool originates; PRInt32 colSpan; nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan); if (!originates || (1 == colSpan)) { continue; } nscoord cellWidths[NUM_WIDTHS]; cellWidths[MIN_CON] = cellFrame->GetPass1MaxElementSize().width; cellWidths[DES_CON] = cellFrame->GetPass1DesiredSize().width; cellWidths[FIX] = WIDTH_NOT_SET; // see if the cell has a style width specified const nsStylePosition* cellPosition; cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)cellPosition); if (eStyleUnit_Coord == cellPosition->mWidth.GetUnit()) { // need to add padding into fixed width const nsStyleSpacing* spacing; cellFrame->GetStyleData(eStyleStruct_Spacing,(const nsStyleStruct *&)spacing); nsMargin paddingMargin; spacing->CalcPaddingFor(cellFrame, paddingMargin); nscoord padding = paddingMargin.left + paddingMargin.right; cellWidths[FIX] = cellPosition->mWidth.GetCoordValue() + padding; cellWidths[FIX] = PR_MAX(cellWidths[FIX], cellWidths[MIN_CON]); } // set MIN_ADJ, DES_ADJ, FIX_ADJ nscoord spanCellSpacing = 0; for (PRInt32 widthX = 0; widthX < NUM_MAJOR_WIDTHS; widthX++) { // skip DES_CON if there is a FIX since FIX is really the desired size if ((DES_CON == widthX) && (cellWidths[FIX] > 0)) continue; nscoord spanTotal = 0; nscoord divisor = 0; PRInt32 spanX; for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); nscoord colWidth = PR_MAX(colFrame->GetWidth(widthX), colFrame->GetWidth(widthX + NUM_MAJOR_WIDTHS)); // need to get a contribution for every cell colWidth = PR_MAX(colWidth, colFrame->GetMinWidth()); spanTotal += colWidth; // accumulate divisor if (widthX == FIX) { colWidth = PR_MAX(colWidth, colFrame->GetDesWidth()); } else if (widthX == DES_CON) { nscoord fixWidth = colFrame->GetFixWidth(); if (fixWidth > 0) { colWidth = fixWidth; } } else if (widthX == MIN_CON) { colWidth = PR_MAX(colWidth, colFrame->GetFixWidth()); } divisor += colWidth; if ((0 == widthX) && (spanX > 0) && (mTableFrame->GetNumCellsOriginatingInCol(colX + spanX) > 0)) { spanCellSpacing += spacingX; } } spanTotal -= spanCellSpacing; nscoord cellWidth = cellWidths[widthX] - spanCellSpacing; if ((cellWidth > 0) && !((widthX == MIN_CON) && (cellWidth <= spanTotal))) { for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); nscoord colWidth = PR_MAX(colFrame->GetWidth(widthX), colFrame->GetWidth(widthX + NUM_MAJOR_WIDTHS)); nscoord minWidth = colFrame->GetMinWidth(); // accumulate numerator similarly to divisor colWidth = PR_MAX(colWidth, colFrame->GetMinWidth()); if (widthX == FIX) { colWidth = PR_MAX(colWidth, colFrame->GetDesWidth()); } else if (widthX == DES_CON) { nscoord fixWidth = colFrame->GetFixWidth(); if (fixWidth > 0) { colWidth = fixWidth; } //colWidth = PR_MAX(colWidth, colFrame->GetFixWidth()); } else if (widthX == MIN_CON) { colWidth = PR_MAX(colWidth, colFrame->GetFixWidth()); } nscoord colAdjWidth = colFrame->GetWidth(widthX + NUM_MAJOR_WIDTHS); nscoord newColAdjWidth = (0 >= spanTotal) ? NSToCoordRound( ((float)cellWidth) / ((float)colSpan) ) : NSToCoordRound( (((float)colWidth) / ((float)divisor)) * cellWidth); if ((newColAdjWidth > colAdjWidth) && (newColAdjWidth > 0)) { newColAdjWidth = PR_MAX(newColAdjWidth, minWidth); if (newColAdjWidth > colFrame->GetWidth(widthX)) { colFrame->SetWidth(widthX + NUM_MAJOR_WIDTHS, newColAdjWidth); colFrame->SetConstrainingCell(cellFrame); // XXX is this right? } } } } } } } // Set the col's fixed width if present // Set the table col width for each col to the content min. for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord fixColWidth = colFrame->GetWidth(FIX); // use the style width of a col only if the col hasn't gotten a fixed width from any cell if (fixColWidth <= 0) { const nsStylePosition* colPosition; colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)colPosition); if (eStyleUnit_Coord == colPosition->mWidth.GetUnit()) { fixColWidth = colPosition->mWidth.GetCoordValue(); if (fixColWidth > 0) { colFrame->SetWidth(FIX, fixColWidth); } } } nscoord minWidth = colFrame->GetMinWidth(); mTableFrame->SetColumnWidth(colX, minWidth); } SetMinAndMaxTableContentWidths(); if (gsDebugAssign) {printf("AssignPrelimColWidths ex\n"); mTableFrame->Dump(PR_TRUE, PR_FALSE);} return rv; } // Determine percentage col widths for each col frame nscoord BasicTableLayoutStrategy::AssignPercentageColumnWidths(nscoord aBasisIn, PRBool aTableIsAutoWidth) { PRInt32 numRows = mTableFrame->GetRowCount(); nscoord spacingX = mTableFrame->GetCellSpacingX(); PRInt32 colX, rowX; nscoord basis = aBasisIn; // For an auto table, determine the potentially new percent adjusted width based // on percent cells/cols. if (aTableIsAutoWidth) { nscoord fixWidthTotal = 0; basis = 0; PRInt32 numPerCols = 0; for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord colBasis = -1; // Scan the cells in the col for (rowX = 0; rowX < numRows; rowX++) { PRBool originates; PRInt32 colSpan; nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan); if (!originates) { // skip cells that don't originate in the col continue; } // see if the cell has a style percent width specified const nsStylePosition* cellPosition; cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)cellPosition); if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) { float percent = cellPosition->mWidth.GetPercentValue(); colBasis = 0; if (percent > 0.0f) { nscoord desWidth = colFrame->GetDesWidth(); if (colSpan > 1) { // sum up the DES_ADJ widths of the spanned cols for (PRInt32 spanX = 1; spanX < colSpan; spanX++) { nsTableColFrame* spanFrame = mTableFrame->GetColFrame(colX + spanX); desWidth += spanFrame->GetWidth(DES_ADJ); } } colBasis = NSToCoordRound((float)desWidth / percent); } } } if (-1 == colBasis) { // see if the col has a style percent width specified const nsStylePosition* colPosition; colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)colPosition); if (eStyleUnit_Percent == colPosition->mWidth.GetUnit()) { float percent = colPosition->mWidth.GetPercentValue(); colBasis = 0; if (percent > 0.0f) { nscoord desWidth = colFrame->GetDesWidth(); colBasis = NSToCoordRound((float)desWidth / percent); } } } basis = PR_MAX(basis, colBasis); if (colBasis >= 0) { numPerCols++; } fixWidthTotal += colFrame->GetFixWidth(); } // end for (colX .. // If there is only one col and it is % based, it won't affect anything if ((1 == mNumCols) && (mNumCols == numPerCols)) { return 0; } basis = PR_MAX(basis, fixWidthTotal); basis = PR_MIN(basis, aBasisIn); } nscoord colPctTotal = 0; nscoord* colPcts = new nscoord[mNumCols]; if (!colPcts) return 0; // Determine the percentage contribution for cols and for cells with colspan = 1 // Iterate backwards, similarly to the reasoning in AssignPreliminaryColumnWidths for (colX = mNumCols - 1; colX >= 0; colX--) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord maxColPctWidth = WIDTH_NOT_SET; float maxColPct = 0.0f; colPcts[colX] = 0; nsTableCellFrame* percentContributor = nsnull; // Scan the cells in the col that have colspan = 1; assign PER widths for (rowX = 0; rowX < numRows; rowX++) { PRBool originates; PRInt32 colSpan; nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan); // skip cells that don't originate at (rowX, colX); colspans are handled in the // next pass, row spans don't need to be handled if (!cellFrame || !originates || (colSpan > 1)) { continue; } // see if the cell has a style percent width specified const nsStylePosition* cellPosition; cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)cellPosition); if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) { float percent = cellPosition->mWidth.GetPercentValue(); if (percent > maxColPct) { maxColPct = percent; maxColPctWidth = NSToCoordRound( ((float)basis) * maxColPct ); percentContributor = cellFrame; if (!mIsNavQuirksMode) { // need to add padding const nsStyleSpacing* spacing; cellFrame->GetStyleData(eStyleStruct_Spacing,(const nsStyleStruct *&)spacing); nsMargin paddingMargin; spacing->CalcPaddingFor(cellFrame, paddingMargin); maxColPctWidth += paddingMargin.left + paddingMargin.right; } } } } if (WIDTH_NOT_SET == maxColPctWidth) { // see if the col has a style percent width specified const nsStylePosition* colPosition; colFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)colPosition); if (eStyleUnit_Percent == colPosition->mWidth.GetUnit()) { maxColPct = colPosition->mWidth.GetPercentValue(); maxColPctWidth = NSToCoordRound( ((float)basis) * maxColPct ); } } // conflicting pct/fixed widths are recorded. Nav 4.x may be changing the // fixed width value if it exceeds the pct value and not recording the pct // value. This is not being done and IE5 doesn't do it either. if (maxColPctWidth > 0) { nscoord minWidth = colFrame->GetMinWidth(); if (minWidth > maxColPctWidth) { maxColPctWidth = minWidth; colPcts[colX] = NSToCoordRound( 100.0f * ((float)maxColPctWidth) / ((float)basis) ); } else { colPcts[colX] = NSToCoordRound(maxColPct * 100.0f); } colFrame->SetWidth(PCT, maxColPctWidth); colFrame->SetConstrainingCell(percentContributor); colPctTotal += colPcts[colX]; } } // For each col, consider the cells originating in it with colspans > 1. // Adjust the cols that each cell spans if necessary. for (colX = 0; colX < mNumCols; colX++) { for (rowX = 0; rowX < numRows; rowX++) { PRBool originates; PRInt32 colSpan; nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan); if (!originates || (1 == colSpan)) { continue; } nscoord cellPctWidth = WIDTH_NOT_SET; // see if the cell has a style percentage width specified const nsStylePosition* cellPosition; cellFrame->GetStyleData(eStyleStruct_Position, (const nsStyleStruct *&)cellPosition); float cellPct = 0.0f; if (eStyleUnit_Percent == cellPosition->mWidth.GetUnit()) { cellPct = cellPosition->mWidth.GetPercentValue(); cellPctWidth = NSToCoordRound( ((float)basis) * cellPct ); if (!mIsNavQuirksMode) { // need to add padding const nsStyleSpacing* spacing; cellFrame->GetStyleData(eStyleStruct_Spacing,(const nsStyleStruct *&)spacing); nsMargin paddingMargin; spacing->CalcPaddingFor(cellFrame, paddingMargin); cellPctWidth += paddingMargin.left + paddingMargin.right; } } if (cellPctWidth > 0) { nscoord spanCellSpacing = 0; nscoord spanTotal = 0; nscoord colPctWidthTotal = 0; // accumulate the spanTotal as the max of MIN, DES, FIX, PCT PRInt32 spanX; for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); nscoord colPctWidth = colFrame->GetWidth(PCT); if (colPctWidth > 0) { // skip pct cols colPctWidthTotal += colPctWidth; continue; } nscoord colWidth = PR_MAX(colFrame->GetMinWidth(), colFrame->GetFixWidth()); colWidth = PR_MAX(colWidth, colFrame->GetDesWidth()); // XXX check this //colWidth = PR_MAX(colWidth, colFrame->GetPctWidth()); spanTotal += colWidth; if ((spanX > 0) && (mTableFrame->GetNumCellsOriginatingInCol(colX + spanX) > 0)) { spanCellSpacing += spacingX; } } cellPctWidth += spanCellSpacing; // add it back in since it was subtracted from aBasisIn if (cellPctWidth <= 0) { continue; } if (colPctWidthTotal < cellPctWidth) { // record the percent contributions for the spanned cols for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); if (colFrame->GetWidth(PCT) > 0) { // skip pct cols continue; } nscoord minWidth = colFrame->GetMinWidth(); nscoord colWidth = PR_MAX(minWidth, colFrame->GetFixWidth()); colWidth = PR_MAX(colWidth, colFrame->GetDesWidth()); // XXX check this float colPctAdj = (0 == spanTotal) ? cellPctWidth / ((float) colSpan) : cellPct * ((float)colWidth) / (float)spanTotal; if (colPctAdj > 0) { nscoord colPctAdjWidth = colFrame->GetWidth(PCT_ADJ); nscoord newColPctAdjWidth = NSToCoordRound(colPctAdj * (float)basis); if (newColPctAdjWidth > colPctAdjWidth) { if (colPctAdjWidth > 0) { // remove its contribution colPctTotal -= colPcts[colX + spanX]; } if (minWidth > newColPctAdjWidth) { newColPctAdjWidth = minWidth; colPcts[colX + spanX] = NSToCoordRound( 100.0f * ((float)newColPctAdjWidth) / ((float)basis) ); } else { colPcts[colX + spanX] = NSToCoordRound( 100.0f * colPctAdj ); } if (newColPctAdjWidth > colFrame->GetWidth(PCT)) { colFrame->SetWidth(PCT_ADJ, newColPctAdjWidth); colFrame->SetConstrainingCell(cellFrame); } colPctTotal += colPcts[colX + spanX]; } } } } } } // end for (rowX .. } // end for (colX .. // if the percent total went over 100%, adjustments need to be made to right most cols if (colPctTotal > 100) { for (colX = mNumCols - 1; colX >= 0; colX--) { if (colPcts[colX] > 0) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); nscoord newPct = colPcts[colX] - (colPctTotal - 100); if (newPct > 0) { // this col has enough percent alloc to handle it nscoord newPctWidth = NSToCoordRound( ((float)basis) * ((float)newPct) / 100.0f ); newPctWidth = PR_MAX(newPctWidth, colFrame->GetMinWidth()); // since we don't care which one contributed, set both colFrame->SetWidth(PCT, newPctWidth); colFrame->SetWidth(PCT_ADJ, newPctWidth); break; } else { // this col cannot handle all the reduction, reduce it down to zero colFrame->SetWidth(PCT, WIDTH_NOT_SET); colFrame->SetWidth(PCT_ADJ, WIDTH_NOT_SET); colPctTotal -= colPcts[colX]; if (colPctTotal <= 100) { break; } } } } } delete [] colPcts; return basis; } // if there are cols with cells originating in them that are not percent based but span // cells which are percent based then the ADJ_MIN needs to be recomputed for the spanned cols. // this code was derived from AssignPreliminaryColumnWidths PRBool BasicTableLayoutStrategy::RecomputeAdjMinIfNecessary() { PRInt32 numRows = mTableFrame->GetRowCount(); PRInt32 colX, rowX, spanX; PRBool spansPercent = PR_FALSE; for (colX = mNumCols - 1; colX >= 0; colX--) { for (rowX = 0; rowX < numRows; rowX++) { PRBool originates; PRInt32 colSpan; nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan); if (!originates || (1 == colSpan)) { continue; } PRBool cellSpansPercent = PR_FALSE; // see if any of the spanned cols are percent based for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); if (colFrame->GetWidth(PCT) > 0) { cellSpansPercent = PR_TRUE; spansPercent = PR_TRUE; break; } } if (cellSpansPercent) { for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); colFrame->SetWidth(MIN_ADJ, WIDTH_NOT_SET); } } } } if (!spansPercent) { return PR_FALSE; } nscoord spacingX = mTableFrame->GetCellSpacingX(); for (colX = mNumCols - 1; colX >= 0; colX--) { for (rowX = 0; rowX < numRows; rowX++) { PRBool originates; PRInt32 colSpan; nsTableCellFrame* cellFrame = mTableFrame->GetCellInfoAt(rowX, colX, &originates, &colSpan); if (!originates || (1 == colSpan)) { continue; } PRBool cellSpansPercent = PR_FALSE; PRInt32 spanX; // see if any of the spanned cols are percent based for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); if (colFrame->GetWidth(PCT) > 0) { cellSpansPercent = PR_TRUE; break; } } if (cellSpansPercent) { // recompute the ADJ_MIN width for every spanned col nscoord spanTotal = 0; nscoord divisor = 0; nscoord spanCellSpacing = 0; PRInt32 spanX; for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); nscoord colWidth = colFrame->GetWidth(MIN_CON); spanTotal += colWidth; colWidth = PR_MAX(colWidth, colFrame->GetWidth(FIX)); colWidth = PR_MAX(colWidth, colFrame->GetWidth(PCT)); divisor += colWidth; if ((spanX > 0) && (mTableFrame->GetNumCellsOriginatingInCol(colX + spanX) > 0)) { spanCellSpacing += spacingX; } } spanTotal -= spanCellSpacing; nscoord cellWidth = cellFrame->GetPass1MaxElementSize().width; if ((cellWidth > 0) && (cellWidth > spanTotal)) { for (spanX = 0; spanX < colSpan; spanX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX + spanX); nscoord minWidth = colFrame->GetWidth(MIN_CON); nscoord colWidth = PR_MAX(minWidth, colFrame->GetWidth(FIX)); colWidth = PR_MAX(colWidth, colFrame->GetWidth(PCT)); nscoord colAdjWidth = colFrame->GetWidth(MIN_ADJ); nscoord newColAdjWidth = (0 >= spanTotal) ? NSToCoordRound( ((float)cellWidth) / ((float)colSpan) ) : NSToCoordRound( (((float)colWidth) / ((float)divisor)) * cellWidth); if ((newColAdjWidth > colAdjWidth) && (newColAdjWidth > 0)) { newColAdjWidth = PR_MAX(newColAdjWidth, minWidth); if (newColAdjWidth > minWidth) { colFrame->SetWidth(MIN_ADJ, newColAdjWidth); } } } } } } } return PR_TRUE; } void BasicTableLayoutStrategy::SetMinAndMaxTableContentWidths() { mMinTableContentWidth = 0; mMaxTableContentWidth = 0; nscoord spacingX = mTableFrame->GetCellSpacingX(); for (PRInt32 colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); mMinTableContentWidth += colFrame->GetMinWidth(); mMaxTableContentWidth += PR_MAX(colFrame->GetDesWidth(), colFrame->GetFixWidth()); if (mTableFrame->GetNumCellsOriginatingInCol(colX) > 0) { mMaxTableContentWidth += spacingX; mMinTableContentWidth += spacingX; } } // if it is not a degenerate table, add the last spacing on the right if (mMinTableContentWidth > 0) { mMinTableContentWidth += spacingX; mMaxTableContentWidth += spacingX; } } // calculate totals by width type. void BasicTableLayoutStrategy::CalculateTotals(PRInt32& aCellSpacing, PRInt32* aTotalCounts, PRInt32* aTotalWidths, PRInt32* aTotalAvailWidths, PRInt32* aMinWidths, PRInt32& a0ProportionalCount) { //mTableFrame->Dump(PR_TRUE, PR_FALSE); aCellSpacing = 0; for (PRInt32 widthX = 0; widthX < NUM_WIDTHS; widthX++) { aTotalCounts[widthX] = 0; aTotalWidths[widthX] = 0; aTotalAvailWidths[widthX] = 0; aMinWidths[widthX] = 0; } a0ProportionalCount = 0; nscoord spacingX = mTableFrame->GetCellSpacingX(); for (PRInt32 colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); if (mTableFrame->GetNumCellsOriginatingInCol(colX) > 0) { aCellSpacing += spacingX; } nscoord minCol = colFrame->GetMinWidth(); aTotalCounts[MIN_CON]++; aTotalWidths[MIN_CON] += minCol; if (e0ProportionConstraint == colFrame->GetConstraint()) { a0ProportionalCount++; } nscoord pct = colFrame->GetPctWidth(); nscoord fix = colFrame->GetWidth(FIX); nscoord fixAdj = colFrame->GetWidth(FIX_ADJ); // if there is a pct width then no others are considered if (pct > 0) { aTotalCounts[PCT]++; aTotalWidths[PCT] += pct; aTotalAvailWidths[PCT] += pct; aMinWidths[PCT] += minCol; continue; } if ((fix > 0) || (fixAdj > 0)) { if (fix > 0) { aTotalCounts[FIX]++; aTotalWidths[FIX] += fix; aTotalAvailWidths[FIX] += fix; aMinWidths[FIX] += minCol; } nscoord desCon = colFrame->GetWidth(DES_CON); if (fixAdj > 0) { if (fixAdj > fix) { aTotalCounts[FIX_ADJ]++; aTotalWidths[FIX_ADJ] += fixAdj; aTotalAvailWidths[FIX_ADJ] += fixAdj; if (fix > 0) { aTotalAvailWidths[FIX_ADJ] -= fix; } else { // there was no fix aMinWidths[FIX_ADJ] += minCol; } // include the DES_CON of a FIX_ADJ that has no FIX if ((desCon > fixAdj) && (fix <= 0)) { aTotalCounts[DES_CON]++; aTotalWidths[DES_CON] += desCon; aTotalAvailWidths[DES_CON] += desCon; if (fixAdj > 0) { aTotalAvailWidths[DES_CON] -= fixAdj; } } } } else { nscoord desAdj = colFrame->GetWidth(DES_ADJ); if ((desAdj > desCon) && (desAdj > fix)) { aTotalCounts[DES_CON]++; aTotalWidths[DES_CON] += desAdj; aTotalAvailWidths[DES_CON] += desAdj - fix; } } continue; } if (eProportionConstraint == colFrame->GetConstraint()) { nscoord minProp = colFrame->GetWidth(MIN_PRO); aTotalCounts[MIN_PRO]++; aTotalWidths[MIN_PRO] += minProp; aTotalAvailWidths[MIN_PRO] = aTotalWidths[MIN_PRO]; aTotalCounts[DES_CON]++; aTotalWidths[DES_CON] += NSToCoordRound(((float)minProp) * mMinToDesProportionRatio); aTotalAvailWidths[DES_CON] = aTotalWidths[DES_CON]; aMinWidths[MIN_PRO] += minCol; aMinWidths[DES_CON] += minProp; continue; } // desired alone is lowest priority aTotalCounts[DES_CON]++; aTotalWidths[DES_CON] += colFrame->GetDesWidth(); aTotalAvailWidths[DES_CON] = aTotalWidths[DES_CON]; aMinWidths[DES_CON] += minCol; } // if it is not a degenerate table, add the last spacing on the right if (mNumCols > 0) { aCellSpacing += spacingX; } } struct nsColInfo { nsColInfo(nsTableColFrame* aFrame, PRInt32 aIndex, PRInt32 aMinWidth, PRInt32 aWidth, PRInt32 aMaxWidth) : mFrame(aFrame), mIndex(aIndex), mMinWidth(aMinWidth), mWidth(aWidth), mMaxWidth(aMaxWidth), mWeight(0) {} nsTableColFrame* mFrame; PRInt32 mIndex; PRInt32 mMinWidth; PRInt32 mWidth; PRInt32 mMaxWidth; float mWeight; }; void AC_Wrapup(nsTableFrame* aTableFrame, PRInt32 aNumItems, nsColInfo** aColInfo, PRBool aAbort = PR_FALSE) { if (aColInfo) { for (PRInt32 i = 0; i < aNumItems; i++) { if (aColInfo[i]) { if (!aAbort) { aTableFrame->SetColumnWidth(aColInfo[i]->mIndex, aColInfo[i]->mWidth); } delete aColInfo[i]; } } delete [] aColInfo; } } void AC_Increase(PRInt32 aNumAutoCols, nsColInfo** aColInfo, PRInt32 aDivisor, PRInt32& aAvailWidth) { for (PRInt32 i = 0; i < aNumAutoCols; i++) { if ((aAvailWidth <= 0) || (aDivisor <= 0)) { break; } float percent = ((float)aColInfo[i]->mMaxWidth) / (float)aDivisor; aDivisor -= aColInfo[i]->mMaxWidth; nscoord addition = NSToCoordRound(((float)(aAvailWidth)) * percent); // if its the last col, try to give what's left to it if ((i == aNumAutoCols - 1) && (addition < aAvailWidth)) { addition = aAvailWidth; } // don't let the addition exceed what is available to add addition = PR_MIN(addition, aAvailWidth); // don't go over the col max addition = PR_MIN(addition, aColInfo[i]->mMaxWidth - aColInfo[i]->mWidth); aColInfo[i]->mWidth += addition; aAvailWidth -= addition; } } void AC_Decrease(PRInt32 aNumAutoCols, nsColInfo** aColInfo, PRInt32 aDivisor, PRInt32& aExcess) { for (PRInt32 i = 0; i < aNumAutoCols; i++) { if ((aExcess <= 0) || (aDivisor <= 0)) { break; } float percent = ((float)aColInfo[i]->mMaxWidth) / (float)aDivisor; aDivisor -= aColInfo[i]->mMaxWidth; nscoord reduction = NSToCoordRound(((float)(aExcess)) * percent); // if its the last col, try to remove the remaining excess from it if ((i == aNumAutoCols - 1) && (reduction < aExcess)) { reduction = aExcess; } // don't let the reduction exceed what is available to reduce reduction = PR_MIN(reduction, aExcess); // don't go under the col min reduction = PR_MIN(reduction, aColInfo[i]->mWidth - aColInfo[i]->mMinWidth); aColInfo[i]->mWidth -= reduction; aExcess -= reduction; } } void AC_Sort(nsColInfo** aColInfo, PRInt32 aNumCols) { // sort the cols based on the Weight for (PRInt32 j = aNumCols - 1; j > 0; j--) { for (PRInt32 i = 0; i < j; i++) { if (aColInfo[i]->mWeight < aColInfo[i+1]->mWeight) { // swap them nsColInfo* save = aColInfo[i]; aColInfo[i] = aColInfo[i+1]; aColInfo[i+1] = save; } } } } // this assumes that the table has set the width for each col to be its min void BasicTableLayoutStrategy::AllocateConstrained(PRInt32 aAvailWidth, PRInt32 aWidthType, PRBool aStartAtMin, PRInt32* aAllocTypes) { if ((0 == aAvailWidth) || (aWidthType < 0) || (aWidthType >= NUM_WIDTHS)) { NS_ASSERTION(PR_TRUE, "invalid args to AllocateConstrained"); return; } PRInt32 numConstrainedCols = 0; nscoord sumMaxConstraints = 0; PRInt32 colX; for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); if (-1 != aAllocTypes[colX]) { if (!CanAllocate(aWidthType, aAllocTypes[colX], colFrame)) { continue; } } numConstrainedCols++; nscoord width = colFrame->GetWidth(aWidthType); if (DES_CON == aWidthType) { width = PR_MAX(width, colFrame->GetWidth(DES_ADJ)); } else if (PCT == aWidthType) { width = PR_MAX(width, colFrame->GetWidth(PCT_ADJ)); } sumMaxConstraints += width; } // allocate storage for the affected cols. Only they get adjusted. nsColInfo** colInfo = new nsColInfo*[numConstrainedCols]; if (!colInfo) return; memset(colInfo, 0, numConstrainedCols * sizeof(nsColInfo *)); PRInt32 maxMinDiff = 0; PRInt32 constrColX = 0; // set the col info entries for each constrained col for (colX = 0; colX < mNumCols; colX++) { nsTableColFrame* colFrame = mTableFrame->GetColFrame(colX); if (-1 != aAllocTypes[colX]) { if (!CanAllocate(aWidthType, aAllocTypes[colX], colFrame)) { continue; } } nscoord minWidth = mTableFrame->GetColumnWidth(colX); nscoord maxWidth = colFrame->GetWidth(aWidthType); if (DES_CON == aWidthType) { maxWidth = PR_MAX(maxWidth, colFrame->GetWidth(DES_ADJ)); } else if (PCT == aWidthType) { maxWidth = PR_MAX(maxWidth, colFrame->GetWidth(PCT_ADJ)); } if (maxWidth <= 0) { continue; } maxWidth = PR_MAX(maxWidth, minWidth); maxMinDiff += maxWidth - minWidth; nscoord startWidth = (aStartAtMin) ? minWidth : maxWidth; colInfo[constrColX] = new nsColInfo(colFrame, colX, minWidth, startWidth, maxWidth); if (!colInfo[constrColX]) { AC_Wrapup(mTableFrame, numConstrainedCols, colInfo, PR_TRUE); return; } aAllocTypes[colX] = aWidthType; constrColX++; } if (constrColX < numConstrainedCols) { // some of the constrainted cols might have been 0 and skipped numConstrainedCols = constrColX; } PRInt32 i; if (aStartAtMin) { // allocate extra space nscoord availWidth = aAvailWidth; for (i = 0; i < numConstrainedCols; i++) { // the weight here is a relative metric for determining when cols reach their max constraint. // A col with a larger weight will reach its max before one with a smaller value. nscoord delta = colInfo[i]->mMaxWidth - colInfo[i]->mWidth; colInfo[i]->mWeight = (delta <= 0) ? 1000000 // cols which have already reached their max get a large value : ((float)colInfo[i]->mMaxWidth) / ((float)delta); } // sort the cols based on the weight so that in one pass cols with higher // weights will get their max earlier than ones with lower weights // This is an innefficient bubble sort, but unless there are an unlikely // large number of cols, it is not an issue. AC_Sort(colInfo, numConstrainedCols); // compute the proportion to be added to each column, don't go beyond the col's // max. This algorithm assumes that the Weight works as stated above AC_Increase(numConstrainedCols, colInfo, sumMaxConstraints, availWidth); } else { // reduce each col width nscoord reduceWidth = maxMinDiff - aAvailWidth; if (reduceWidth < 0) { NS_ASSERTION(PR_TRUE, "AllocateConstrained called incorrectly"); AC_Wrapup(mTableFrame, numConstrainedCols, colInfo); return; } for (i = 0; i < numConstrainedCols; i++) { // the weight here is a relative metric for determining when cols reach their min. // A col with a larger weight will reach its min before one with a smaller value. nscoord delta = colInfo[i]->mWidth - colInfo[i]->mMinWidth; colInfo[i]->mWeight = (delta <= 0) ? 1000000 // cols which have already reached their min get a large value : ((float)colInfo[i]->mWidth) / ((float)delta); } // sort the cols based on the Weight AC_Sort(colInfo, numConstrainedCols); // compute the proportion to be subtracted from each column, don't go beyond // the col's min. This algorithm assumes that the Weight works as stated above AC_Decrease(numConstrainedCols, colInfo, sumMaxConstraints, reduceWidth); } AC_Wrapup(mTableFrame, numConstrainedCols, colInfo); } // XXX this function will be improved after the colspan algorithms have been extracted // from AssignPreliminarColumnWidths and AssignPercentageColumnWidths. For now, pessimistic // assumptions are made PRBool BasicTableLayoutStrategy::ColumnsCanBeInvalidatedBy(nsStyleCoord* aPrevStyleWidth, const nsTableCellFrame& aCellFrame) const { if (!mTableFrame) return PR_TRUE; const nsStylePosition* cellPosition; aCellFrame.GetStyleData(eStyleStruct_Position, (const nsStyleStruct*&)cellPosition); const nsStyleCoord& styleWidth = cellPosition->mWidth; PRInt32 colIndex; aCellFrame.GetColIndex(colIndex); nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex); nscoord colSpan = mTableFrame->GetEffectiveColSpan(&aCellFrame); if (aPrevStyleWidth) { nsTableColFrame* colSpanFrame = colFrame; // see if this cell is responsible for setting a fixed or percentage based col for (PRInt32 span = 1; span <= colSpan; span++) { if (&aCellFrame == colSpanFrame->GetConstrainingCell()) return PR_TRUE; // assume that the style change will affect cols if (span < colSpan) colSpanFrame = mTableFrame->GetColFrame(colIndex + span); } // if we get here, the cell was not responsible for a fixed or percentage col switch(aPrevStyleWidth->GetUnit()) { case eStyleUnit_Percent: if (eStyleUnit_Percent == styleWidth.GetUnit()) { // PCT to PCT if (aPrevStyleWidth->GetPercentValue() < styleWidth.GetPercentValue()) return PR_TRUE; // XXX see comments above } // PCT to FIX and PCT to AUTO changes have no effect since PCT allocations // are the highest priority and the cell's previous PCT value did not // cause it to be responsible for setting any cells PCT_ADJ case eStyleUnit_Coord: if (eStyleUnit_Percent == styleWidth.GetUnit()) { // FIX to PCT return PR_TRUE; // XXX see comments above } else if (eStyleUnit_Coord == styleWidth.GetUnit()) { // FIX to FIX nscoord newWidth = styleWidth.GetCoordValue(); if (aPrevStyleWidth->GetCoordValue() < newWidth) { if (colSpan > 1) return PR_TRUE; // XXX see comments above if (newWidth > colFrame->GetFixWidth()) return PR_TRUE; // XXX see comments above } } // FIX to AUTO results in no column changes here case eStyleUnit_Auto: if (eStyleUnit_Percent == styleWidth.GetUnit()) { // AUTO to PCT return PR_TRUE; // XXX see comments above } else if (eStyleUnit_Coord == styleWidth.GetUnit()) { // AUTO to FIX return PR_TRUE; // XXX see comments above } // AUTO to AUTO is not a style change default: break; } } return PR_FALSE; } // XXX this function will be improved after the colspan algorithms have been extracted // from AssignPreliminarColumnWidths and AssignPercentageColumnWidths. For now, pessimistic // assumptions are made PRBool BasicTableLayoutStrategy::ColumnsCanBeInvalidatedBy(const nsTableCellFrame& aCellFrame, PRBool aConsiderMinWidth) const { if (aConsiderMinWidth || !mTableFrame) return PR_TRUE; PRInt32 colIndex; aCellFrame.GetColIndex(colIndex); nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex); nscoord colSpan = mTableFrame->GetEffectiveColSpan(&aCellFrame); // check to see if DES_CON can affect columns nsTableColFrame* spanFrame = colFrame; for (PRInt32 span = 0; span < colSpan; span++) { // see if the column width is constrained if ((spanFrame->GetPctWidth() > 0) || (spanFrame->GetFixWidth() > 0) || (spanFrame->GetWidth(MIN_PRO) > 0)) { if ((spanFrame->GetWidth(PCT_ADJ) > 0) && (spanFrame->GetWidth(PCT) <= 0)) { return PR_TRUE; } if ((spanFrame->GetWidth(FIX_ADJ) > 0) && (spanFrame->GetWidth(FIX) <= 0)) { return PR_TRUE; // its unfortunate that the balancing algorithms cause this } } else { return PR_TRUE; // XXX need to add cases if table has coord width specified } if (span < colSpan - 1) spanFrame = mTableFrame->GetColFrame(colIndex + span + 1); } return PR_FALSE; } PRBool BasicTableLayoutStrategy::ColumnsAreValidFor(const nsTableCellFrame& aCellFrame, nscoord aPrevCellMin, nscoord aPrevCellDes) const { PRInt32 colIndex; aCellFrame.GetColIndex(colIndex); nsTableColFrame* colFrame = mTableFrame->GetColFrame(colIndex); nscoord colSpan = mTableFrame->GetEffectiveColSpan(&aCellFrame); nscoord cellMin = aCellFrame.GetPass1MaxElementSize().width; nscoord cellDes = aCellFrame.GetPass1DesiredSize().width; nscoord colMin = colFrame->GetMinWidth(); nscoord colDes = colFrame->GetDesWidth(); PRBool minChanged = PR_TRUE; if (((cellMin > aPrevCellMin) && (cellMin <= colMin)) || ((cellMin <= aPrevCellMin) && (aPrevCellMin <= colMin))) { minChanged = PR_FALSE; } if (minChanged) { return PR_FALSE; // XXX add cases where table has coord width and cell is constrained } PRBool desChanged = PR_TRUE; if (((cellDes > aPrevCellDes) && (cellDes <= colDes)) || ((cellDes <= aPrevCellDes) && (aPrevCellDes <= colDes))) { desChanged = PR_FALSE; } if (1 == colSpan) { // see if the column width is constrained if ((colFrame->GetPctWidth() > 0) || (colFrame->GetFixWidth() > 0) || (colFrame->GetWidth(MIN_PRO) > 0)) { if ((colFrame->GetWidth(PCT_ADJ) > 0) && (colFrame->GetWidth(PCT) <= 0)) { if (desChanged) { return PR_FALSE; // XXX add cases where table has coord width } } if ((colFrame->GetWidth(FIX_ADJ) > 0) && (colFrame->GetWidth(FIX) <= 0)) { if (desChanged) { return PR_FALSE; // its unfortunate that the balancing algorithms cause this // XXX add cases where table has coord width } } } else { // the column width is not constrained if (desChanged) { return PR_FALSE; } } } else { return PR_FALSE; // XXX this needs a lot of cases } return PR_TRUE; } 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 (colIndexGetColumnFrame(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; } void BasicTableLayoutStrategy::Dump(PRInt32 aIndent) { char* indent = new char[aIndent + 1]; for (PRInt32 i = 0; i < aIndent + 1; i++) { indent[i] = ' '; } indent[aIndent] = 0; printf("%s**START BASIC STRATEGY DUMP** table=%p cols=%X numCols=%d", indent, mTableFrame, mCols, mNumCols); printf("\n%s minConWidth=%d maxConWidth=%d cellSpacing=%d propRatio=%.2f navQuirks=%d", indent, mMinTableContentWidth, mMaxTableContentWidth, mCellSpacingTotal, mMinToDesProportionRatio, mIsNavQuirksMode); printf(" **END BASIC STRATEGY DUMP** \n"); delete [] indent; }