зеркало из https://github.com/mozilla/pjs.git
1434 строки
62 KiB
C++
1434 строки
62 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "BasicTableLayoutStrategy.h"
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#include "nsTableFrame.h"
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#include "nsTableColFrame.h"
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#include "nsColLayoutData.h"
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#include "nsCellLayoutData.h"
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#include "nsTableCol.h"
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#include "nsTableCellFrame.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsIPtr.h"
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#include "nsHTMLIIDs.h"
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NS_DEF_PTR(nsTableCol);
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NS_DEF_PTR(nsIStyleContext);
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#ifdef NS_DEBUG
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static PRBool gsDebug = PR_FALSE;
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static PRBool gsDebugCLD = PR_FALSE;
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#else
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static const PRBool gsDebug = PR_FALSE;
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static const PRBool gsDebugCLD = PR_FALSE;
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#endif
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/* ---------- ProportionalColumnLayoutStruct ---------- */
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// TODO: make public so other subclasses can use it
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/** useful info about a column for layout */
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struct ProportionalColumnLayoutStruct
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{
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ProportionalColumnLayoutStruct(PRInt32 aColIndex,
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nscoord aMinColWidth,
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nscoord aMaxColWidth,
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PRInt32 aProportion)
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{
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mColIndex = aColIndex;
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mMinColWidth = aMinColWidth;
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mMaxColWidth = aMaxColWidth;
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mProportion = aProportion;
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};
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PRInt32 mColIndex;
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nscoord mMinColWidth;
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nscoord mMaxColWidth;
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PRInt32 mProportion;
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};
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/* ---------- BasicTableLayoutStrategy ---------- */
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/* return true if the style indicates that the width is proportional
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* for the purposes of column width determination
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*/
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PRBool BasicTableLayoutStrategy::IsFixedWidth(const nsStylePosition* aStylePosition)
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{
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PRBool result = PR_FALSE; // assume that it is not fixed width
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PRInt32 unitType;
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if (nsnull == aStylePosition) {
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unitType = eStyleUnit_Auto;
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}
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else {
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unitType = aStylePosition->mWidth.GetUnit();
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}
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switch (unitType) {
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case eStyleUnit_Coord:
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result = PR_TRUE;
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case eStyleUnit_Auto:
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case eStyleUnit_Proportional:
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case eStyleUnit_Percent:
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break;
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// TODO
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case eStyleUnit_Inherit:
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break;
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default:
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NS_ASSERTION(PR_FALSE, "illegal style type in IsFixedWidth");
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break;
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}
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return result;
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}
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PRBool BasicTableLayoutStrategy::IsAutoWidth(const nsStylePosition* aStylePosition)
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{
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PRBool result = PR_TRUE; // assume that it is
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if (nsnull!=aStylePosition)
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{
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result = (PRBool)(eStyleUnit_Auto==aStylePosition->mWidth.GetUnit());
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}
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return result;
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}
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BasicTableLayoutStrategy::BasicTableLayoutStrategy(nsTableFrame *aFrame, PRInt32 aNumCols)
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{
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NS_ASSERTION(nsnull!=aFrame, "bad frame arg");
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mTableFrame = aFrame;
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mNumCols = aNumCols;
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//cache the value of the cols attribute
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nsIFrame * tableFrame = mTableFrame;
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// begin REMOVE_ME_WHEN_TABLE_STYLE_IS_RESOLVED! XXX
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tableFrame->GetGeometricParent(tableFrame);
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// end REMOVE_ME_WHEN_TABLE_STYLE_IS_RESOLVED! XXX
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nsStyleTable *tableStyle;
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tableFrame->GetStyleData(eStyleStruct_Table, (nsStyleStruct *&)tableStyle);
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mCols = tableStyle->mCols;
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}
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BasicTableLayoutStrategy::~BasicTableLayoutStrategy()
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{
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}
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PRBool BasicTableLayoutStrategy::BalanceColumnWidths(nsIPresContext* aPresContext,
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nsIStyleContext *aTableStyle,
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const nsReflowState& aReflowState,
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nscoord aMaxWidth,
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nscoord &aTotalFixedWidth,
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nscoord &aMinTableWidth,
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nscoord &aMaxTableWidth,
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nsSize* aMaxElementSize)
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{
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PRBool result = PR_TRUE;
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// initialize out parameters
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aTotalFixedWidth=aMinTableWidth=aMaxTableWidth=0;
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// Step 1 - assign the width of all fixed-width columns
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AssignFixedColumnWidths(aPresContext, aMaxWidth, aTotalFixedWidth, aMinTableWidth, aMaxTableWidth);
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if (nsnull!=aMaxElementSize)
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{ // this is where we initialize maxElementSize if it is non-null
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aMaxElementSize->height = 0;
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aMaxElementSize->width = aMinTableWidth;
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if (gsDebug) printf(" setting aMaxElementSize->width = %d\n", aMaxElementSize->width);
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}
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else
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{
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if (gsDebug) printf(" nsnull aMaxElementSize\n");
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}
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// Step 2 - determine how much space is really available
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PRInt32 availWidth = aMaxWidth - aTotalFixedWidth;
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nscoord tableWidth = 0;
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PRBool tableIsAutoWidth = nsTableFrame::TableIsAutoWidth(mTableFrame, aTableStyle, aReflowState, tableWidth);
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if (PR_FALSE==tableIsAutoWidth)
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availWidth = tableWidth - aTotalFixedWidth;
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// Step 3 - assign the width of all proportional-width columns in the remaining space
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if (gsDebug==PR_TRUE) printf ("Step 2...\n availWidth = %d\n", availWidth);
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result = BalanceProportionalColumns(aPresContext, aReflowState,
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availWidth, aMaxWidth,
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aMinTableWidth, aMaxTableWidth,
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tableWidth, tableIsAutoWidth);
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return result;
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}
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/*
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STEP 1
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for every col
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if the col has a fixed width
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set the width to max(fixed width, maxElementSize)
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if the cell spans columns, divide the cell width between the columns
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else skip it for now
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take borders and padding into account
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STEP 2
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determine the min and max size for the table width
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if col is proportionately specified
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if (col width specified to 0)
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col width = minColWidth
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else if (minTableWidth >= aMaxSize.width)
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set col widths to min, install a hor. scroll bar
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else if (maxTableWidth <= aMaxSize.width)
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set each col to its max size
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else
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W = aMaxSize.width - minTableWidth
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D = maxTableWidth - minTableWidth
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for each col
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d = maxColWidth - minColWidth
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col width = minColWidth + ((d*W)/D)
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STEP 3
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if there is space left over
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for every col
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if col is proportionately specified
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add space to col width until it is that proportion of the table width
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do this non-destructively in case there isn't enough space
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if there isn't enough space as determined in the prior step,
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add space in proportion to the proportionate width attribute
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*/
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// Step 1 - assign the width of all fixed-width columns,
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// and calculate min/max table width
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PRBool BasicTableLayoutStrategy::AssignFixedColumnWidths(nsIPresContext* aPresContext,
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nscoord aMaxWidth,
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nscoord &aTotalFixedWidth,
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nscoord &aMinTableWidth,
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nscoord &aMaxTableWidth)
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{
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#ifdef DEBUG
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nsIFrame *tablePIF=nsnull;
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mTableFrame->GetPrevInFlow(tablePIF);
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NS_ASSERTION(nsnull==tablePIF, "never ever call me on a continuing frame!");
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#endif
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if (gsDebug==PR_TRUE) printf (" AssignFixedColumnWidths\n");
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nsVoidArray *spanList=nsnull;
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PRBool hasColsAttribute = (PRBool)(NS_STYLE_TABLE_COLS_NONE!=mCols);
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PRInt32 *minColWidthArray = nsnull;
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PRInt32 *maxColWidthArray = nsnull;
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if (PR_TRUE==hasColsAttribute)
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{
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minColWidthArray = new PRInt32[mNumCols];
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maxColWidthArray = new PRInt32[mNumCols];
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}
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// for every column, determine it's min and max width, and keep track of the table width
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for (PRInt32 colIndex = 0; colIndex<mNumCols; colIndex++)
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{
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nsVoidArray *columnLayoutData = mTableFrame->GetColumnLayoutData();
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nsColLayoutData * colData = (nsColLayoutData *)(columnLayoutData->ElementAt(colIndex));
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NS_ASSERTION(nsnull != colData, "bad column data");
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nsTableColFrame *colFrame = colData->GetColFrame();
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NS_ASSERTION(nsnull!=colFrame, "bad col frame");
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// need to track min/max column width for setting min/max table widths
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PRInt32 minColWidth = 0;
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PRInt32 maxColWidth = 0;
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nsVoidArray *cells = colData->GetCells();
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PRInt32 numCells = cells->Count();
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if (gsDebug==PR_TRUE) printf (" for column %d numCells = %d\n", colIndex, numCells);
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// Get the columns's style
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nsIStyleContextPtr colSC;
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colFrame->GetStyleContext(aPresContext, colSC.AssignRef());
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const nsStylePosition* colPosition = (const nsStylePosition*) colSC->GetStyleData(eStyleStruct_Position);
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// Get column width if it has one
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PRBool haveColWidth = PR_FALSE;
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nscoord specifiedFixedColWidth=0;
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switch (colPosition->mWidth.GetUnit()) {
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case eStyleUnit_Coord:
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haveColWidth = PR_TRUE;
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specifiedFixedColWidth = colPosition->mWidth.GetCoordValue();
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mTableFrame->SetColumnWidth(colIndex, specifiedFixedColWidth); //QQQ add in margins?
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break;
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default:
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break;
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}
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// TODO - use specifiedFixedColWidth to influence the width when both col span and fixed col width are given
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/* Scan the column, simulatneously assigning fixed column widths
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* and computing the min/max column widths
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*/
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// first, deal with any cells that span into this column from a pervious column
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if (nsnull!=spanList)
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{
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PRInt32 spanCount = spanList->Count();
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// go through the list backwards so we can delete easily
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for (PRInt32 spanIndex=spanCount-1; 0<=spanIndex; spanIndex--)
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{
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SpanInfo *spanInfo = (SpanInfo *)(spanList->ElementAt(spanIndex));
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if (minColWidth < spanInfo->cellMinWidth)
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minColWidth = spanInfo->cellMinWidth;
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if (maxColWidth < spanInfo->cellDesiredWidth)
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maxColWidth = spanInfo->cellDesiredWidth;
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spanInfo->span--;
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if (gsDebug==PR_TRUE)
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printf (" for spanning cell %d with remaining span=%d, min = %d and des = %d\n",
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spanIndex, spanInfo->span, spanInfo->cellMinWidth, spanInfo->cellDesiredWidth);
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if (0==spanInfo->span)
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{
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spanList->RemoveElementAt(spanIndex);
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delete spanInfo;
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}
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}
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}
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for (PRInt32 cellIndex = 0; cellIndex<numCells; cellIndex++)
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{
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nsCellLayoutData * data = (nsCellLayoutData *)(cells->ElementAt(cellIndex));
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if (nsnull == data) {
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// For cells that span rows there's only cell layout data for the first row
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continue;
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}
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nsMargin margin;
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nsresult result = data->GetMargin(margin);
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nsSize * cellMinSize = data->GetMaxElementSize();
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nsReflowMetrics * cellDesiredSize = data->GetDesiredSize();
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NS_ASSERTION(nsnull != cellDesiredSize, "bad cellDesiredSize");
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PRInt32 colSpan = data->GetCellFrame()->GetColSpan();
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if (gsDebug==PR_TRUE)
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printf (" for cell %d with colspan=%d, min = %d,%d and des = %d,%d, margins %d %d\n",
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cellIndex, colSpan, cellMinSize->width, cellMinSize->height,
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cellDesiredSize->width, cellDesiredSize->height,
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margin.left, margin.right);
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switch (colPosition->mWidth.GetUnit()) {
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case eStyleUnit_Coord:
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{
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// This col has a fixed width, so set the cell's width to the
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// larger of (specified width, largest max_element_size of the
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// cells in the column)
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PRInt32 widthForThisCell = PR_MAX(cellMinSize->width, colPosition->mWidth.GetCoordValue());
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if (mTableFrame->GetColumnWidth(colIndex) < widthForThisCell)
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{
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if (gsDebug) printf (" setting fixed width to %d\n",widthForThisCell);
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mTableFrame->SetColumnWidth(colIndex, widthForThisCell); //QQQ add in margins?
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maxColWidth = widthForThisCell;
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}
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}
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break;
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default:
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break;
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}
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// regardless of the width specification, keep track of the
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// min/max column widths
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nscoord cellMinWidth = cellMinSize->width/colSpan;
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nscoord cellDesiredWidth = cellDesiredSize->width/colSpan;
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if (aMaxWidth!=cellDesiredSize->width)
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{
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if (NS_UNCONSTRAINEDSIZE!=cellMinWidth)
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cellMinWidth += margin.left + margin.right;
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if (NS_UNCONSTRAINEDSIZE!=cellDesiredWidth)
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cellDesiredWidth += margin.left + margin.right;
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}
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if (minColWidth < cellMinWidth)
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minColWidth = cellMinWidth;
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if (maxColWidth < cellDesiredWidth)
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maxColWidth = cellDesiredWidth;
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if (1<colSpan)
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{
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// add the cell to our list of spanners
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SpanInfo *spanInfo = new SpanInfo(colSpan-1, cellMinWidth, cellDesiredWidth);
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if (nsnull==spanList)
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spanList = new nsVoidArray();
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spanList->AppendElement(spanInfo);
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}
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if (gsDebug) {
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printf (" after cell %d, minColWidth = %d and maxColWidth = %d\n",
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cellIndex, minColWidth, maxColWidth);
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}
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}
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// keep a running total of the amount of space taken up by all fixed-width columns
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if (PR_TRUE==haveColWidth)
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aTotalFixedWidth += mTableFrame->GetColumnWidth(colIndex);
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if (gsDebug) {
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printf (" after col %d, aTotalFixedWidth = %d\n",
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colIndex, aTotalFixedWidth);
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}
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// add col[i] metrics to the running totals for the table min/max width
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if (NS_UNCONSTRAINEDSIZE!=aMinTableWidth)
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aMinTableWidth += minColWidth; // SEC: insets!
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if (aMinTableWidth<=0)
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aMinTableWidth = NS_UNCONSTRAINEDSIZE; // handle overflow
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if (NS_UNCONSTRAINEDSIZE!=aMaxTableWidth)
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aMaxTableWidth += maxColWidth; // SEC: insets!
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if (aMaxTableWidth<=0)
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aMaxTableWidth = NS_UNCONSTRAINEDSIZE; // handle overflow
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if (PR_TRUE==hasColsAttribute)
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{
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minColWidthArray[colIndex] = minColWidth;
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maxColWidthArray[colIndex] = maxColWidth;
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}
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if (gsDebug==PR_TRUE)
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printf (" after col %d, minTableWidth = %d and maxTableWidth = %d\n",
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colIndex, aMinTableWidth, aMaxTableWidth);
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} // end Step 1 for fixed-width columns
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// now, post-process the computed values based on the table attributes
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// if there is a COLS attribute, fix up aMinTableWidth and aMaxTableWidth
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if (PR_TRUE==hasColsAttribute)
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{
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// for every effected column, subtract out its prior contribution and add back in the new value
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PRInt32 numColsEffected = mNumCols;
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if (NS_STYLE_TABLE_COLS_ALL!=mCols)
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numColsEffected = mCols;
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PRInt32 maxOfMinColWidths=0;
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PRInt32 maxOfMaxColWidths=0;
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PRInt32 effectedColIndex;
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for (effectedColIndex=0; effectedColIndex<numColsEffected; effectedColIndex++)
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{
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if (maxOfMinColWidths < minColWidthArray[effectedColIndex])
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maxOfMinColWidths = minColWidthArray[effectedColIndex];
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if (maxOfMaxColWidths < maxColWidthArray[effectedColIndex])
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maxOfMaxColWidths = maxColWidthArray[effectedColIndex];
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}
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for (effectedColIndex=0; effectedColIndex<numColsEffected; effectedColIndex++)
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{
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// subtract out the prior contributions of this column
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// and add back in the adjusted value
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if (NS_UNCONSTRAINEDSIZE!=aMinTableWidth)
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{
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aMinTableWidth -= minColWidthArray[effectedColIndex];
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aMinTableWidth += maxOfMinColWidths;
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}
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if (NS_UNCONSTRAINEDSIZE!=aMaxTableWidth)
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{
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aMaxTableWidth -= maxColWidthArray[effectedColIndex];
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aMaxTableWidth += maxOfMaxColWidths;
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}
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}
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delete [] minColWidthArray;
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delete [] maxColWidthArray;
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}
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if (PR_TRUE==gsDebug)
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printf ("%p: aMinTW=%d, aMaxTW=%d\n", mTableFrame, aMinTableWidth, aMaxTableWidth);
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if (nsnull!=spanList)
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delete spanList;
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return PR_TRUE;
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}
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PRBool BasicTableLayoutStrategy::BalanceProportionalColumns(nsIPresContext* aPresContext,
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const nsReflowState& aReflowState,
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nscoord aAvailWidth,
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nscoord aMaxWidth,
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nscoord aMinTableWidth,
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nscoord aMaxTableWidth,
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nscoord aTableFixedWidth,
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PRBool aTableIsAutoWidth)
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{
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PRBool result = PR_TRUE;
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if (0==aTableFixedWidth)
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{
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if (NS_UNCONSTRAINEDSIZE==aMaxWidth || NS_UNCONSTRAINEDSIZE==aMinTableWidth)
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{ // the max width of the table fits comfortably in the available space
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if (gsDebug) printf (" * table laying out in NS_UNCONSTRAINEDSIZE, calling BalanceColumnsTableFits\n");
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result = BalanceColumnsTableFits(aPresContext, aReflowState, aAvailWidth,
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aMaxWidth, aTableFixedWidth, aTableIsAutoWidth);
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}
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else if (aMinTableWidth > aMaxWidth)
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{ // the table doesn't fit in the available space
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if (gsDebug) printf (" * min table does not fit, calling SetColumnsToMinWidth\n");
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result = SetColumnsToMinWidth(aPresContext);
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}
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else if (aMaxTableWidth <= aMaxWidth)
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{ // the max width of the table fits comfortably in the available space
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if (gsDebug) printf (" * table desired size fits, calling BalanceColumnsTableFits\n");
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result = BalanceColumnsTableFits(aPresContext, aReflowState, aAvailWidth,
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aMaxWidth, aTableFixedWidth, aTableIsAutoWidth);
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}
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else
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{ // the table fits somewhere between its min and desired size
|
|
if (gsDebug) printf (" * table desired size does not fit, calling BalanceColumnsConstrained\n");
|
|
result = BalanceColumnsConstrained(aPresContext, aReflowState, aAvailWidth,
|
|
aMaxWidth, aMinTableWidth, aMaxTableWidth);
|
|
}
|
|
}
|
|
else
|
|
{ // tables with fixed-width have their own rules
|
|
if (NS_UNCONSTRAINEDSIZE==aMinTableWidth)
|
|
{ // the table has empty content, and needs to be streched to the specified width
|
|
if (gsDebug) printf (" * specified width table > maxTableWidth, calling BalanceColumnsTableFits\n");
|
|
result = BalanceColumnsTableFits(aPresContext, aReflowState, aAvailWidth,
|
|
aMaxWidth, aTableFixedWidth, aTableIsAutoWidth);
|
|
}
|
|
else if ((aTableFixedWidth<aMinTableWidth) /*|| (aAvailWidth<aMinTableWidth)*/)
|
|
{ // the table's specified width doesn't fit in the available space
|
|
if (gsDebug) printf (" * specified width table with width<minTableWidth, calling SetColumnsToMinWidth\n");
|
|
result = SetColumnsToMinWidth(aPresContext);
|
|
}
|
|
else if (aTableFixedWidth<aMaxTableWidth)
|
|
{ // the table's specified width is between it's min and max, so fit the columns in proportionately
|
|
if (gsDebug) printf (" * specified width table < maxTableWidth, calling BalanceColumnsConstrained\n");
|
|
result = BalanceColumnsConstrained(aPresContext, aReflowState, aAvailWidth,
|
|
aAvailWidth, aMinTableWidth, aMaxTableWidth);
|
|
// should 3rd param above be aAvailWidth?
|
|
}
|
|
else
|
|
{ // the table's specified width is >= its max width, so give each column its max requested size
|
|
if (gsDebug) printf (" * specified width table > maxTableWidth, calling BalanceColumnsTableFits\n");
|
|
result = BalanceColumnsTableFits(aPresContext, aReflowState, aAvailWidth,
|
|
aMaxWidth, aTableFixedWidth, aTableIsAutoWidth);
|
|
}
|
|
}
|
|
return result;
|
|
}
|
|
|
|
PRBool BasicTableLayoutStrategy::SetColumnsToMinWidth(nsIPresContext* aPresContext)
|
|
{
|
|
PRBool result = PR_TRUE;
|
|
|
|
PRBool hasColsAttribute = (PRBool)(NS_STYLE_TABLE_COLS_NONE!=mCols);
|
|
|
|
PRInt32 *minColWidthArray = nsnull;
|
|
if (PR_TRUE==hasColsAttribute)
|
|
{
|
|
minColWidthArray = new PRInt32[mNumCols];
|
|
}
|
|
|
|
nsVoidArray *columnLayoutData = mTableFrame->GetColumnLayoutData();
|
|
PRInt32 numCols = columnLayoutData->Count();
|
|
for (PRInt32 colIndex = 0; colIndex<numCols; colIndex++)
|
|
{
|
|
nsColLayoutData * colData = (nsColLayoutData *)(columnLayoutData->ElementAt(colIndex));
|
|
nsVoidArray *cells = colData->GetCells();
|
|
PRInt32 minColWidth = 0;
|
|
PRInt32 maxColWidth = 0;
|
|
PRInt32 numCells = cells->Count();
|
|
if (gsDebug==PR_TRUE) printf (" for col %d\n", colIndex);
|
|
|
|
// XXX need column frame to ask this question
|
|
const nsStylePosition* colPosition = nsnull;
|
|
|
|
if (PR_FALSE==IsFixedWidth(colPosition))
|
|
{
|
|
for (PRInt32 cellIndex = 0; cellIndex<numCells; cellIndex++)
|
|
{ // this col has proportional width, so determine its width requirements
|
|
nsCellLayoutData * data = (nsCellLayoutData *)(cells->ElementAt(cellIndex));
|
|
if (nsnull==data)
|
|
{ // For cells that span rows there's only cell layout data for the first row
|
|
continue;
|
|
}
|
|
nsMargin margin;
|
|
data->GetMargin(margin);
|
|
nsSize * cellMinSize = data->GetMaxElementSize();
|
|
NS_ASSERTION(nsnull != cellMinSize, "bad cellMinSize");
|
|
nscoord cellMinWidth = cellMinSize->width; // do we need to take into account colSpan here?
|
|
cellMinWidth += margin.left + margin.right;
|
|
if (minColWidth < cellMinWidth)
|
|
minColWidth = cellMinWidth;
|
|
}
|
|
if (PR_TRUE==hasColsAttribute)
|
|
{
|
|
minColWidthArray[colIndex] = minColWidth;
|
|
}
|
|
|
|
if (gsDebug==PR_TRUE)
|
|
{
|
|
printf (" for determining width of col %d %s:\n",
|
|
colIndex, !IsFixedWidth(colPosition)? "(P)":"(A)");
|
|
printf (" minColWidth = %d\n", minColWidth);
|
|
}
|
|
|
|
mTableFrame->SetColumnWidth(colIndex, minColWidth);
|
|
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 aMinTableWidth and aMaxTableWidth
|
|
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;
|
|
PRInt32 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);
|
|
}
|
|
delete [] minColWidthArray;
|
|
}
|
|
|
|
|
|
return result;
|
|
}
|
|
|
|
PRBool BasicTableLayoutStrategy::BalanceColumnsTableFits(nsIPresContext* aPresContext,
|
|
const nsReflowState& aReflowState,
|
|
nscoord aAvailWidth,
|
|
nscoord aMaxWidth,
|
|
nscoord aTableFixedWidth,
|
|
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;
|
|
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
|
|
nsVoidArray *spanList=nsnull; // a list of the cells that span columns
|
|
nsVoidArray *columnLayoutData = mTableFrame->GetColumnLayoutData();
|
|
PRInt32 numCols = columnLayoutData->Count();
|
|
nscoord * effectiveColumnWidths = new nscoord[numCols]; // used for Nav4 compatible table fluffing
|
|
nsCRT::memset (effectiveColumnWidths, 0, numCols*sizeof(PRInt32));
|
|
for (PRInt32 colIndex = 0; colIndex<numCols; colIndex++)
|
|
{
|
|
if (gsDebug==PR_TRUE) printf (" for col %d\n", colIndex);
|
|
PRInt32 minColWidth = 0;
|
|
PRInt32 maxColWidth = 0;
|
|
// Get column information
|
|
nsColLayoutData * colData = (nsColLayoutData *)(columnLayoutData->ElementAt(colIndex));
|
|
nsVoidArray *cells = colData->GetCells();
|
|
PRInt32 numCells = cells->Count();
|
|
|
|
// Get the columns's style
|
|
nsTableColFrame *colFrame = colData->GetColFrame();
|
|
NS_ASSERTION(nsnull!=colFrame, "bad col frame");
|
|
nsIStyleContextPtr colSC;
|
|
colFrame->GetStyleContext(aPresContext, colSC.AssignRef());
|
|
const nsStylePosition* colPosition = (const nsStylePosition*) colSC->GetStyleData(eStyleStruct_Position);
|
|
if (gsDebug) printf("col %d has frame %p with style %p and pos %p\n",
|
|
colIndex, colFrame, (nsIStyleContext *)colSC, colPosition);
|
|
|
|
if (PR_FALSE==IsFixedWidth(colPosition))
|
|
{
|
|
// first, deal with any cells that span into this column from a pervious column
|
|
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 (minColWidth < spanInfo->cellMinWidth)
|
|
minColWidth = spanInfo->cellMinWidth;
|
|
if (maxColWidth < spanInfo->cellDesiredWidth)
|
|
maxColWidth = spanInfo->cellDesiredWidth;
|
|
spanInfo->span--;
|
|
if (gsDebug==PR_TRUE)
|
|
printf (" for spanning cell %d with remaining span=%d, min = %d and des = %d\n",
|
|
spanIndex, spanInfo->span, spanInfo->cellMinWidth, spanInfo->cellDesiredWidth);
|
|
if (0==spanInfo->span)
|
|
{
|
|
spanList->RemoveElementAt(spanIndex);
|
|
delete spanInfo;
|
|
}
|
|
}
|
|
}
|
|
|
|
for (PRInt32 cellIndex = 0; cellIndex<numCells; cellIndex++)
|
|
{ // this col has proportional width, so determine its width requirements
|
|
nsCellLayoutData * data = (nsCellLayoutData *)(cells->ElementAt(cellIndex));
|
|
if (nsnull == data) {
|
|
// For cells that span columns there's only cell layout data for the first column
|
|
continue;
|
|
}
|
|
|
|
PRInt32 colSpan = data->GetCellFrame()->GetColSpan();
|
|
// distribute a portion of the spanning cell's min and max width to this column
|
|
nsSize * cellMinSize = data->GetMaxElementSize();
|
|
NS_ASSERTION(nsnull != cellMinSize, "bad cellMinSize");
|
|
nsReflowMetrics * cellDesiredSize = data->GetDesiredSize();
|
|
NS_ASSERTION(nsnull != cellDesiredSize, "bad cellDesiredSize");
|
|
|
|
nsMargin margin;
|
|
nsresult result = data->GetMargin(margin);
|
|
nscoord marginWidth = margin.left + margin.right;
|
|
PRInt32 cellMinWidth = cellMinSize->width/colSpan + marginWidth;
|
|
// first get the desired size info from reflow pass 1
|
|
PRInt32 cellDesiredWidth = cellDesiredSize->width/colSpan + marginWidth;
|
|
// then get the desired size info factoring in the cell style attributes
|
|
nscoord specifiedCellWidth=-1;
|
|
nsIStyleContextPtr cellSC;
|
|
data->GetCellFrame()->GetStyleContext(aPresContext, cellSC.AssignRef());
|
|
const nsStylePosition* cellPosition = (const nsStylePosition*)
|
|
cellSC->GetStyleData(eStyleStruct_Position);
|
|
switch (cellPosition->mWidth.GetUnit()) {
|
|
case eStyleUnit_Coord:
|
|
specifiedCellWidth = cellPosition->mWidth.GetCoordValue();
|
|
if (gsDebug) printf("cell has specified coord width = %d\n", specifiedCellWidth);
|
|
break;
|
|
|
|
case eStyleUnit_Percent:
|
|
{
|
|
nscoord tableWidth=0;
|
|
nsIStyleContextPtr tableSC;
|
|
mTableFrame->GetStyleContext(aPresContext, tableSC.AssignRef());
|
|
PRBool tableIsAutoWidth = nsTableFrame::TableIsAutoWidth(mTableFrame, tableSC, aReflowState, tableWidth);
|
|
float percent = cellPosition->mWidth.GetPercentValue();
|
|
specifiedCellWidth = (PRInt32)(tableWidth*percent);
|
|
if (gsDebug) printf("specified percent width %f of %d = %d\n",
|
|
percent, tableWidth, specifiedCellWidth);
|
|
break;
|
|
}
|
|
|
|
case eStyleUnit_Inherit:
|
|
// XXX for now, do nothing
|
|
default:
|
|
case eStyleUnit_Auto:
|
|
break;
|
|
}
|
|
if (-1!=specifiedCellWidth)
|
|
{
|
|
if (specifiedCellWidth>cellMinWidth)
|
|
{
|
|
if (gsDebug) printf("setting cellDesiredWidth from %d to %d\n",
|
|
cellDesiredWidth, specifiedCellWidth);
|
|
cellDesiredWidth = specifiedCellWidth; // TODO: some math needed here for colspans
|
|
}
|
|
}
|
|
|
|
if (PR_TRUE==gsDebug)
|
|
printf("factoring in cell %d with colSpan=%d\n factoring in min=%d and desired=%d\n",
|
|
cellIndex, colSpan, cellMinWidth, cellDesiredWidth);
|
|
if (minColWidth < cellMinWidth)
|
|
minColWidth = cellMinWidth;
|
|
if (maxColWidth < cellDesiredWidth)
|
|
maxColWidth = cellDesiredWidth;
|
|
// effectiveColumnWidth is the width as if no cells with colspans existed
|
|
if ((1==colSpan) && (effectiveColumnWidths[colIndex] < maxColWidth))
|
|
effectiveColumnWidths[colIndex] = cellDesiredWidth;
|
|
if (gsDebug==PR_TRUE)
|
|
printf (" after cell %d, minColWidth=%d maxColWidth=%d effColWidth[%d]=%d\n",
|
|
cellIndex, minColWidth, maxColWidth,
|
|
colIndex, effectiveColumnWidths[colIndex]);
|
|
if (1<colSpan)
|
|
{ // add the cell to our list of spanners
|
|
SpanInfo *spanInfo = new SpanInfo(colSpan-1, cellMinWidth, cellDesiredWidth);
|
|
if (nsnull==spanList)
|
|
spanList = new nsVoidArray();
|
|
spanList->AppendElement(spanInfo);
|
|
}
|
|
}
|
|
|
|
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_Coord:
|
|
specifiedFixedColumnWidth = colPosition->mWidth.GetCoordValue();
|
|
if (gsDebug) printf("column %d has specified coord width = %d\n", colIndex, specifiedFixedColumnWidth);
|
|
break;
|
|
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)
|
|
{ // 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
|
|
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 if (-1!=specifiedFixedColumnWidth)
|
|
{ // the column has a specified pixel width
|
|
// if the column was computed to be too small, enlarge the column
|
|
nscoord resolvedWidth = specifiedFixedColumnWidth;
|
|
if (specifiedFixedColumnWidth <= minColWidth)
|
|
resolvedWidth = minColWidth;
|
|
mTableFrame->SetColumnWidth(colIndex, resolvedWidth);
|
|
if (gsDebug==PR_TRUE)
|
|
printf (" 3 fixed: col %d given %d\n", colIndex, resolvedWidth);
|
|
}
|
|
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*aTableFixedWidth)/100);
|
|
if (gsDebug==PR_TRUE)
|
|
printf (" 3 percent specified: col %d given %d percent of aTableFixedWidth %d, set to width = %d\n",
|
|
colIndex, percentage, aTableFixedWidth, mTableFrame->GetColumnWidth(colIndex));
|
|
}
|
|
if (-1==percentage)
|
|
{
|
|
percentage = 100/numCols;
|
|
// 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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
tableWidth += mTableFrame->GetColumnWidth(colIndex);
|
|
}
|
|
|
|
/* --- post-process if necessary --- */
|
|
// first, assign a width to proportional-width columns
|
|
if (nsnull!=proportionalColumnsList)
|
|
{
|
|
// first, figure out the amount of space per slice
|
|
nscoord maxWidthForTable = (0!=aTableFixedWidth) ? aTableFixedWidth : 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;
|
|
effectiveColumnWidths[info->mColIndex] = 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;
|
|
effectiveColumnWidths[info->mColIndex] = 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))
|
|
{
|
|
DistributeExcessSpace(aAvailWidth, tableWidth, effectiveColumnWidths);
|
|
}
|
|
// today we always allocate effectiveColumnWidths, but tomorrow we might be smarter, so leave the check in
|
|
if (nsnull!=effectiveColumnWidths)
|
|
delete [] effectiveColumnWidths;
|
|
if (nsnull!=spanList)
|
|
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 aTableFixedWidth,
|
|
nscoord aComputedTableWidth,
|
|
nscoord *aColWidths)
|
|
{
|
|
nscoord excess = 0;
|
|
if (PR_TRUE==gsDebug) printf ("DistributeExcessSpace: fixed width %d > computed table width %d\n",
|
|
aTableFixedWidth, 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;
|
|
if (gsDebug==PR_TRUE)
|
|
printf(" aTableFixedWidth specified as %d, expanding columns by excess = %d\n", aTableFixedWidth, excess);
|
|
// 1. first, get the total width of the auto columns
|
|
PRInt32 i;
|
|
for (i = 0; i<numAutoColumns; i++)
|
|
{
|
|
if (0!=aColWidths[autoColumns[i]])
|
|
totalEffectiveWidthOfAutoColumns += aColWidths[autoColumns[i]];
|
|
else
|
|
totalEffectiveWidthOfAutoColumns += mTableFrame->GetColumnWidth(autoColumns[i]);
|
|
}
|
|
excess = aTableFixedWidth - aComputedTableWidth;
|
|
// 2. next, compute the proportion to be added to each column, and add it
|
|
for (i = 0; i<numAutoColumns; i++)
|
|
{
|
|
PRInt32 colIndex = autoColumns[i];
|
|
nscoord oldColWidth = aColWidths[colIndex];
|
|
float percent;
|
|
if (0!=totalEffectiveWidthOfAutoColumns)
|
|
percent = ((float)(aColWidths[colIndex]))/((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, aColWidths[colIndex], 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 = aTableFixedWidth - aComputedTableWidth;
|
|
nscoord excessPerColumn = excess/mNumCols;
|
|
if (gsDebug==PR_TRUE)
|
|
printf(" aTableFixedWidth specified as %d, expanding columns by excess = %d\n", aTableFixedWidth, excess);
|
|
for (PRInt32 colIndex = 0; colIndex<mNumCols; colIndex++)
|
|
{
|
|
nscoord oldColWidth = aColWidths[colIndex];
|
|
if (0==oldColWidth)
|
|
oldColWidth = mTableFrame->GetColumnWidth(colIndex);
|
|
float percent;
|
|
if (0!=aComputedTableWidth)
|
|
percent = (float)oldColWidth/(float)aComputedTableWidth;
|
|
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\n",
|
|
colIndex, aColWidths[colIndex], colWidth);
|
|
mTableFrame->SetColumnWidth(colIndex, colWidth);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* this method is very similar to BalanaceColumnsTableFits, but there are enough
|
|
* subtle differences that code reuse is impractical. it's a shame.
|
|
*/
|
|
PRBool BasicTableLayoutStrategy::BalanceColumnsConstrained( nsIPresContext* aPresContext,
|
|
const nsReflowState& aReflowState,
|
|
nscoord aAvailWidth,
|
|
nscoord aMaxWidth,
|
|
nscoord aMinTableWidth,
|
|
nscoord aMaxTableWidth)
|
|
{
|
|
#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
|
|
nsVoidArray *columnLayoutData = mTableFrame->GetColumnLayoutData();
|
|
PRInt32 numCols = columnLayoutData->Count();
|
|
nscoord * effectiveMaxColumnWidths = new nscoord[numCols]; // used for Nav4 compatible table fluffing
|
|
nsCRT::memset (effectiveMaxColumnWidths, 0, numCols*sizeof(PRInt32));
|
|
nscoord * effectiveMinColumnWidths = new nscoord[numCols]; // used for Nav4 compatible table fluffing
|
|
nsCRT::memset (effectiveMinColumnWidths, 0, numCols*sizeof(PRInt32));
|
|
for (PRInt32 colIndex = 0; colIndex<numCols; colIndex++)
|
|
{
|
|
if (gsDebug==PR_TRUE) printf (" for col %d\n", colIndex);
|
|
nscoord minColWidth = 0;
|
|
nscoord maxColWidth = 0;
|
|
|
|
// Get column information
|
|
nsColLayoutData * colData = (nsColLayoutData *)(columnLayoutData->ElementAt(colIndex));
|
|
nsVoidArray *cells = colData->GetCells();
|
|
PRInt32 numCells = cells->Count();
|
|
|
|
// Get the columns's style
|
|
nsTableColFrame *colFrame = colData->GetColFrame();
|
|
NS_ASSERTION(nsnull!=colFrame, "bad col frame");
|
|
nsIStyleContextPtr colSC;
|
|
colFrame->GetStyleContext(aPresContext, colSC.AssignRef());
|
|
const nsStylePosition* colPosition = (const nsStylePosition*) colSC->GetStyleData(eStyleStruct_Position);
|
|
|
|
if (PR_FALSE==IsFixedWidth(colPosition))
|
|
{
|
|
// first, deal with any cells that span into this column from a pervious column
|
|
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 (minColWidth < spanInfo->cellMinWidth)
|
|
minColWidth = spanInfo->cellMinWidth;
|
|
if (maxColWidth < spanInfo->cellDesiredWidth)
|
|
maxColWidth = spanInfo->cellDesiredWidth;
|
|
spanInfo->span--;
|
|
if (gsDebug==PR_TRUE)
|
|
printf (" for spanning cell %d with remaining span=%d, min = %d and des = %d\n",
|
|
spanIndex, spanInfo->span, spanInfo->cellMinWidth, spanInfo->cellDesiredWidth);
|
|
if (0==spanInfo->span)
|
|
{
|
|
spanList->RemoveElementAt(spanIndex);
|
|
delete spanInfo;
|
|
}
|
|
}
|
|
}
|
|
for (PRInt32 cellIndex = 0; cellIndex<numCells; cellIndex++)
|
|
{ // this col has proportional width, so determine its width requirements
|
|
nsCellLayoutData * data = (nsCellLayoutData *)(cells->ElementAt(cellIndex));
|
|
if (nsnull == data) {
|
|
// For cells that span rows there's only cell layout data for the first row
|
|
continue;
|
|
}
|
|
|
|
PRInt32 colSpan = data->GetCellFrame()->GetColSpan();
|
|
nsSize * cellMinSize = data->GetMaxElementSize();
|
|
NS_ASSERTION(nsnull != cellMinSize, "bad cellMinSize");
|
|
nsReflowMetrics * cellDesiredSize = data->GetDesiredSize();
|
|
NS_ASSERTION(nsnull != cellDesiredSize, "bad cellDesiredSize");
|
|
|
|
nsMargin margin;
|
|
nsresult result = data->GetMargin(margin);
|
|
nscoord marginWidth = margin.left + margin.right;
|
|
|
|
PRInt32 cellMinWidth = cellMinSize->width/colSpan + marginWidth;
|
|
// first get the desired size info from reflow pass 1
|
|
PRInt32 cellDesiredWidth = cellDesiredSize->width/colSpan + marginWidth;
|
|
// then get the desired size info factoring in the cell style attributes
|
|
nscoord specifiedCellWidth=-1;
|
|
nsIStyleContextPtr cellSC;
|
|
data->GetCellFrame()->GetStyleContext(aPresContext, cellSC.AssignRef());
|
|
const nsStylePosition* cellPosition = (const nsStylePosition*)
|
|
cellSC->GetStyleData(eStyleStruct_Position);
|
|
switch (cellPosition->mWidth.GetUnit()) {
|
|
case eStyleUnit_Coord:
|
|
specifiedCellWidth = cellPosition->mWidth.GetCoordValue();
|
|
if (gsDebug) printf("cell has specified coord width = %d\n", specifiedCellWidth);
|
|
break;
|
|
|
|
case eStyleUnit_Percent:
|
|
{
|
|
nscoord knownTableWidth=0;
|
|
nsIStyleContextPtr tableSC;
|
|
mTableFrame->GetStyleContext(aPresContext, tableSC.AssignRef());
|
|
PRBool tableIsAutoWidth = nsTableFrame::TableIsAutoWidth(mTableFrame, tableSC, aReflowState, knownTableWidth);
|
|
float percent = cellPosition->mWidth.GetPercentValue();
|
|
specifiedCellWidth = (PRInt32)(knownTableWidth*percent);
|
|
if (gsDebug) printf("specified percent width %f of %d = %d\n",
|
|
percent, knownTableWidth, specifiedCellWidth);
|
|
break;
|
|
}
|
|
|
|
case eStyleUnit_Inherit:
|
|
// XXX for now, do nothing
|
|
default:
|
|
case eStyleUnit_Auto:
|
|
break;
|
|
}
|
|
if (-1!=specifiedCellWidth)
|
|
{
|
|
if (specifiedCellWidth>cellMinWidth)
|
|
{
|
|
if (gsDebug) printf("setting cellDesiredWidth from %d to %d\n",
|
|
cellDesiredWidth, specifiedCellWidth);
|
|
cellDesiredWidth = specifiedCellWidth; // TODO: some math needed here for colspans
|
|
}
|
|
}
|
|
|
|
if (PR_TRUE==gsDebug)
|
|
printf("factoring in cell %d with colSpan=%d\n factoring in min=%d and desired=%d\n",
|
|
cellIndex, colSpan, cellMinWidth, cellDesiredWidth);
|
|
// remember the widest min cell width
|
|
if (minColWidth < cellMinWidth)
|
|
minColWidth = cellMinWidth;
|
|
// effectiveMinColumnWidth is the width as if no cells with colspans existed
|
|
if ((1==colSpan) && (effectiveMinColumnWidths[colIndex] < minColWidth))
|
|
effectiveMinColumnWidths[colIndex] = 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) && (effectiveMaxColumnWidths[colIndex] < maxColWidth))
|
|
effectiveMaxColumnWidths[colIndex] = cellDesiredWidth;
|
|
if (gsDebug==PR_TRUE)
|
|
printf (" after cell %d, minColWidth=%d maxColWidth=%d effColWidth[%d]=%d,%d\n",
|
|
cellIndex, minColWidth, maxColWidth,
|
|
colIndex, effectiveMaxColumnWidths[colIndex], effectiveMaxColumnWidths[colIndex]);
|
|
if (1<colSpan)
|
|
{
|
|
// add the cell to our list of spanners
|
|
SpanInfo *spanInfo = new SpanInfo(colSpan-1, cellMinWidth, cellDesiredWidth);
|
|
if (nsnull==spanList)
|
|
spanList = new nsVoidArray();
|
|
spanList->AppendElement(spanInfo);
|
|
}
|
|
}
|
|
|
|
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",
|
|
aMinTableWidth, aMaxTableWidth);
|
|
printf (" minColWidth = %d, maxColWidth = %d, eff=%d,%d\n",
|
|
minColWidth, maxColWidth, effectiveMinColumnWidths[colIndex],
|
|
effectiveMaxColumnWidths[colIndex]);
|
|
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_Coord:
|
|
specifiedFixedColumnWidth = colPosition->mWidth.GetCoordValue();
|
|
if (gsDebug) printf("column %d has specified coord width = %d\n", colIndex, specifiedFixedColumnWidth);
|
|
break;
|
|
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==numCols)
|
|
{ // 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 if (-1!=specifiedFixedColumnWidth)
|
|
{ // the column has a specified pixel width
|
|
// if the column was computed to be too small, enlarge the column
|
|
nscoord resolvedWidth = specifiedFixedColumnWidth;
|
|
if (specifiedFixedColumnWidth <= minColWidth)
|
|
resolvedWidth = minColWidth;
|
|
mTableFrame->SetColumnWidth(colIndex, resolvedWidth);
|
|
if (gsDebug==PR_TRUE)
|
|
printf (" 4 fixed: col %d given %d\n", colIndex, resolvedWidth);
|
|
}
|
|
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/numCols;
|
|
// 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);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
/* --- post-process if necessary --- */
|
|
if (PR_TRUE==atLeastOneAutoWidthColumn)
|
|
{ // proportionately distribute the remaining space to autowidth columns
|
|
DistributeRemainingSpace(aAvailWidth, tableWidth, effectiveMinColumnWidths, effectiveMaxColumnWidths);
|
|
}
|
|
// second, 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
|
|
// today we always allocate effectiveColumnWidths, but tomorrow we might be smarter, so leave the check in
|
|
if (nsnull!=effectiveMinColumnWidths)
|
|
delete [] effectiveMinColumnWidths;
|
|
if (nsnull!=effectiveMaxColumnWidths)
|
|
delete [] effectiveMaxColumnWidths;
|
|
if (nsnull!=spanList)
|
|
delete spanList;
|
|
|
|
return result;
|
|
}
|
|
|
|
//XXX: make sure aTFW takes into account fixed width cells already assigned
|
|
// 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 aTableFixedWidth,
|
|
nscoord aComputedTableWidth,
|
|
nscoord *aMinColWidths,
|
|
nscoord *aMaxColWidths)
|
|
{
|
|
if (PR_TRUE==gsDebug)
|
|
printf ("DistributeRemainingSpace: fixed width %d > computed table width %d\n",
|
|
aTableFixedWidth, aComputedTableWidth);
|
|
// if there are auto-sized columns, give them the extra space
|
|
PRInt32 numAutoColumns=0;
|
|
PRInt32 *autoColumns=nsnull;
|
|
// 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 = aTableFixedWidth - aComputedTableWidth;
|
|
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++)
|
|
{
|
|
if (0!=aMaxColWidths[autoColumns[i]])
|
|
totalEffectiveWidthOfAutoColumns += aMaxColWidths[autoColumns[i]];
|
|
else
|
|
totalEffectiveWidthOfAutoColumns += mTableFrame->GetColumnWidth(autoColumns[i]);
|
|
}
|
|
if (gsDebug==PR_TRUE)
|
|
printf(" aTableFixedWidth specified as %d, availWidth is = %d\n",
|
|
aTableFixedWidth, 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];
|
|
float percent;
|
|
if (0!=aTableFixedWidth)
|
|
percent = ((float)(aMaxColWidths[colIndex]))/((float)totalEffectiveWidthOfAutoColumns);
|
|
else
|
|
percent = ((float)1)/((float)numAutoColumns);
|
|
nscoord colWidth = (nscoord)(availWidth*percent);
|
|
if (colWidth<aMinColWidths[colIndex])
|
|
{
|
|
availWidth -= (aMinColWidths[colIndex]-colWidth);
|
|
colWidth=aMinColWidths[colIndex];
|
|
}
|
|
if (gsDebug==PR_TRUE)
|
|
printf(" distribute width to auto columns: column %d was %d, now set to %d\n",
|
|
colIndex, aMaxColWidths[colIndex], colWidth);
|
|
mTableFrame->SetColumnWidth(colIndex, colWidth);
|
|
}
|
|
}
|
|
}
|
|
|
|
|