зеркало из https://github.com/mozilla/pjs.git
implementation of table-layout=fixed strategy
This commit is contained in:
buster%netscape.com
Родитель
8441b66d77
Коммит
f13e461396
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@ -0,0 +1,185 @@
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/* -*- 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
|
||||
* 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.
|
||||
*/
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||||
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#include "FixedTableLayoutStrategy.h"
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#include "nsTableFrame.h"
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#include "nsTableColFrame.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 "nsVoidArray.h"
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#include "nsIPtr.h"
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#include "nsHTMLIIDs.h"
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NS_DEF_PTR(nsIStyleContext);
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#ifdef NS_DEBUG
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static PRBool gsDebug = PR_TRUE;
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#else
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static const PRBool gsDebug = PR_FALSE;
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#endif
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FixedTableLayoutStrategy::FixedTableLayoutStrategy(nsTableFrame *aFrame, PRInt32 aNumCols)
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: BasicTableLayoutStrategy(aFrame, aNumCols)
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{
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}
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FixedTableLayoutStrategy::~FixedTableLayoutStrategy()
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{
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}
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PRBool FixedTableLayoutStrategy::BalanceColumnWidths(nsIStyleContext *aTableStyle,
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const nsReflowState& aReflowState,
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nscoord aMaxWidth)
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{
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#ifdef NS_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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PRBool result;
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NS_ASSERTION(nsnull!=aTableStyle, "bad arg");
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if (nsnull==aTableStyle)
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return PR_FALSE;
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if (PR_TRUE==gsDebug)
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{
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printf("\n%p: BALANCE COLUMN WIDTHS\n", mTableFrame);
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for (PRInt32 i=0; i<mNumCols; i++)
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printf(" col %d assigned width %d\n", i, mTableFrame->GetColumnWidth(i));
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printf("\n");
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}
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return result;
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}
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/* assign the width of all columns
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* if there is a colframe with a width attribute, use it as the column width
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* otherwise if there is a cell in the first row and it has a width attribute, use it
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* if this cell includes a colspan, width is divided equally among spanned columns
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* otherwise the cell get a proportion of the remaining space
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* as determined by the table width attribute. If no table width attribute, it gets 0 width
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*/
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PRBool FixedTableLayoutStrategy::AssignPreliminaryColumnWidths()
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{
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if (gsDebug==PR_TRUE) printf ("** %p: AssignPreliminaryColumnWidths **\n", mTableFrame);
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PRInt32 colIndex;
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PRInt32 specifiedColumns=0; // the number of columns whose width is given
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nscoord totalWidth = 0; // the sum of the widths of the columns whose width is given
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PRBool * autoWidthColumns = new PRBool[mNumCols];
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nsCRT::memset(autoWidthColumns, PR_TRUE, mNumCols*sizeof(PRBool));
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// for every column, determine it's specified width
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for (colIndex = 0; colIndex<mNumCols; colIndex++)
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{
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// Get column information
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nsTableColFrame *colFrame = mTableFrame->GetColFrame(colIndex);
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NS_ASSERTION(nsnull!=colFrame, "bad col frame");
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// Get the columns's style
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const nsStylePosition* colPosition;
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colFrame->GetStyleData(eStyleStruct_Position, (nsStyleStruct*&)colPosition);
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// Get fixed column width if it has one
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if (eStyleUnit_Coord==colPosition->mWidth.GetUnit())
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{
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nscoord colWidth = colPosition->mWidth.GetCoordValue();
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mTableFrame->SetColumnWidth(colIndex, colWidth);
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totalWidth += colWidth;
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specifiedColumns++;
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autoWidthColumns[colIndex]=PR_FALSE;
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if (PR_TRUE==gsDebug)
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printf ("from col, col %d set to width %d\n", colIndex, colWidth);
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}
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else
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{
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nsTableCellFrame *cellFrame = mTableFrame->GetCellFrameAt(0, colIndex);
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if (nsnull!=cellFrame)
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{
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// Get the cell's style
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const nsStylePosition* cellPosition;
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cellFrame->GetStyleData(eStyleStruct_Position, (nsStyleStruct*&)cellPosition);
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// Get fixed column width if it has one
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if (eStyleUnit_Coord==cellPosition->mWidth.GetUnit())
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{
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PRInt32 colSpan = mTableFrame->GetEffectiveColSpan(colIndex, cellFrame);
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nscoord effectiveWidth = cellPosition->mWidth.GetCoordValue()/colSpan;
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mTableFrame->SetColumnWidth(colIndex, effectiveWidth);
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totalWidth += effectiveWidth;
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specifiedColumns++;
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autoWidthColumns[colIndex]=PR_FALSE;
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if (PR_TRUE==gsDebug)
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printf ("from cell, col %d set to width %d\n", colIndex, effectiveWidth);
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}
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}
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}
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}
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// for every column that did not have a specified width, compute its width from the remaining space
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if (mNumCols > specifiedColumns)
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{
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// Get the table's style
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const nsStylePosition* tablePosition;
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mTableFrame->GetStyleData(eStyleStruct_Position, (nsStyleStruct*&)tablePosition);
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if (eStyleUnit_Coord==tablePosition->mWidth.GetUnit())
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{
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nscoord specifiedTableWidth = tablePosition->mWidth.GetCoordValue();
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nscoord remainingTableWidth = specifiedTableWidth - totalWidth;
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if (PR_TRUE==gsDebug)
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printf ("%p: specifiedTW=%d, remainingTW=%d\n",
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mTableFrame, specifiedTableWidth, remainingTableWidth);
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if (0<remainingTableWidth)
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{
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nscoord widthPerColumn = remainingTableWidth/(mNumCols-specifiedColumns);
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for (colIndex = 0; colIndex<mNumCols; colIndex++)
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{
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if (PR_TRUE==autoWidthColumns[colIndex])
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{
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mTableFrame->SetColumnWidth(colIndex, widthPerColumn);
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totalWidth += widthPerColumn;
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if (PR_TRUE==gsDebug)
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printf ("auto col %d set to width %d\n", colIndex, widthPerColumn);
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}
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}
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}
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}
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}
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// min/MaxTW is max of (specified table width, sum of specified column(cell) widths)
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mMinTableWidth = mMaxTableWidth = totalWidth;
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if (PR_TRUE==gsDebug)
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printf ("%p: aMinTW=%d, aMaxTW=%d\n", mTableFrame, mMinTableWidth, mMaxTableWidth);
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// clean up
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if (nsnull!=autoWidthColumns)
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{
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delete [] autoWidthColumns;
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}
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return PR_TRUE;
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}
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@ -0,0 +1,85 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
||||
*
|
||||
* The contents of this file are subject to the Netscape Public License
|
||||
* Version 1.0 (the "NPL"); you may not use this file except in
|
||||
* compliance with the NPL. You may obtain a copy of the NPL at
|
||||
* http://www.mozilla.org/NPL/
|
||||
*
|
||||
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
||||
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
||||
* for the specific language governing rights and limitations under the
|
||||
* NPL.
|
||||
*
|
||||
* The Initial Developer of this code under the NPL is Netscape
|
||||
* Communications Corporation. Portions created by Netscape are
|
||||
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
||||
* Reserved.
|
||||
*/
|
||||
|
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#ifndef FixedTableLayoutStrategy_h__
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#define FixedTableLayoutStrategy_h__
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#include "nscore.h"
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#include "BasicTableLayoutStrategy.h"
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#include "nsCoord.h"
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class nsVoidArray;
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class nsTableFrame;
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struct nsStylePosition;
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/* ---------- FixedTableLayoutStrategy ---------- */
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/** Implementation of HTML4 "table-layout=fixed" table layout.
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* The input to this class is the resolved styles for both the
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* table columns and the cells in row0.
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* The output from this class is to set the column widths in
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* mTableFrame.
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*/
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class FixedTableLayoutStrategy : public BasicTableLayoutStrategy
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{
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public:
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/** Public constructor.
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* @paran aFrame the table frame for which this delegate will do layout
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* @param aNumCols the total number of columns in the table
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*/
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FixedTableLayoutStrategy(nsTableFrame *aFrame, PRInt32 aNumCols);
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/** destructor */
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virtual ~FixedTableLayoutStrategy();
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/** no need to override Initialize since it calls our AssignPreliminaryColumnWidths */
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// virtual PRBool Initialize(nsSize* aMaxElementSize);
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/** Called during resize reflow to determine the new column widths
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* @param aTableStyle - the resolved style for mTableFrame
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* @param aReflowState - the reflow state for mTableFrame
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* @param aMaxWidth - the computed max width for columns to fit into
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*/
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virtual PRBool BalanceColumnWidths(nsIStyleContext * aTableStyle,
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const nsReflowState& aReflowState,
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nscoord aMaxWidth);
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protected:
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/* assign the width of all columns
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* if there is a colframe with a width attribute, use it as the column width.
|
||||
* otherwise if there is a cell in the first row and it has a width attribute, use it.
|
||||
* if this cell includes a colspan, width is divided equally among spanned columns
|
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* otherwise the cell get a proportion of the remaining space.
|
||||
* as determined by the table width attribute. If no table width attribute, it gets 0 width
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* Computes the minimum and maximum table widths.
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*
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* Set column width information in each column frame and in the table frame.
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*
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* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
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*
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*/
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virtual PRBool AssignPreliminaryColumnWidths();
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};
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#endif
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@ -0,0 +1,185 @@
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
||||
*
|
||||
* The contents of this file are subject to the Netscape Public License
|
||||
* Version 1.0 (the "NPL"); you may not use this file except in
|
||||
* compliance with the NPL. You may obtain a copy of the NPL at
|
||||
* http://www.mozilla.org/NPL/
|
||||
*
|
||||
* Software distributed under the NPL is distributed on an "AS IS" basis,
|
||||
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
|
||||
* for the specific language governing rights and limitations under the
|
||||
* NPL.
|
||||
*
|
||||
* The Initial Developer of this code under the NPL is Netscape
|
||||
* Communications Corporation. Portions created by Netscape are
|
||||
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
|
||||
* Reserved.
|
||||
*/
|
||||
|
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#include "FixedTableLayoutStrategy.h"
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#include "nsTableFrame.h"
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#include "nsTableColFrame.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 "nsVoidArray.h"
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#include "nsIPtr.h"
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#include "nsHTMLIIDs.h"
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|
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NS_DEF_PTR(nsIStyleContext);
|
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|
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|
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#ifdef NS_DEBUG
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static PRBool gsDebug = PR_TRUE;
|
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#else
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static const PRBool gsDebug = PR_FALSE;
|
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#endif
|
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|
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FixedTableLayoutStrategy::FixedTableLayoutStrategy(nsTableFrame *aFrame, PRInt32 aNumCols)
|
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: BasicTableLayoutStrategy(aFrame, aNumCols)
|
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{
|
||||
}
|
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|
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FixedTableLayoutStrategy::~FixedTableLayoutStrategy()
|
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{
|
||||
}
|
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|
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PRBool FixedTableLayoutStrategy::BalanceColumnWidths(nsIStyleContext *aTableStyle,
|
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const nsReflowState& aReflowState,
|
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nscoord aMaxWidth)
|
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{
|
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#ifdef NS_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
|
||||
|
||||
PRBool result;
|
||||
|
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NS_ASSERTION(nsnull!=aTableStyle, "bad arg");
|
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if (nsnull==aTableStyle)
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return PR_FALSE;
|
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|
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|
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if (PR_TRUE==gsDebug)
|
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{
|
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printf("\n%p: BALANCE COLUMN WIDTHS\n", mTableFrame);
|
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for (PRInt32 i=0; i<mNumCols; i++)
|
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printf(" col %d assigned width %d\n", i, mTableFrame->GetColumnWidth(i));
|
||||
printf("\n");
|
||||
}
|
||||
|
||||
return result;
|
||||
}
|
||||
|
||||
/* assign the width of all columns
|
||||
* if there is a colframe with a width attribute, use it as the column width
|
||||
* otherwise if there is a cell in the first row and it has a width attribute, use it
|
||||
* if this cell includes a colspan, width is divided equally among spanned columns
|
||||
* otherwise the cell get a proportion of the remaining space
|
||||
* as determined by the table width attribute. If no table width attribute, it gets 0 width
|
||||
*/
|
||||
PRBool FixedTableLayoutStrategy::AssignPreliminaryColumnWidths()
|
||||
{
|
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if (gsDebug==PR_TRUE) printf ("** %p: AssignPreliminaryColumnWidths **\n", mTableFrame);
|
||||
|
||||
PRInt32 colIndex;
|
||||
PRInt32 specifiedColumns=0; // the number of columns whose width is given
|
||||
nscoord totalWidth = 0; // the sum of the widths of the columns whose width is given
|
||||
|
||||
PRBool * autoWidthColumns = new PRBool[mNumCols];
|
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nsCRT::memset(autoWidthColumns, PR_TRUE, mNumCols*sizeof(PRBool));
|
||||
|
||||
// for every column, determine it's specified width
|
||||
for (colIndex = 0; colIndex<mNumCols; colIndex++)
|
||||
{
|
||||
// Get column information
|
||||
nsTableColFrame *colFrame = mTableFrame->GetColFrame(colIndex);
|
||||
NS_ASSERTION(nsnull!=colFrame, "bad col frame");
|
||||
|
||||
// Get the columns's style
|
||||
const nsStylePosition* colPosition;
|
||||
colFrame->GetStyleData(eStyleStruct_Position, (nsStyleStruct*&)colPosition);
|
||||
|
||||
// Get fixed column width if it has one
|
||||
if (eStyleUnit_Coord==colPosition->mWidth.GetUnit())
|
||||
{
|
||||
nscoord colWidth = colPosition->mWidth.GetCoordValue();
|
||||
mTableFrame->SetColumnWidth(colIndex, colWidth);
|
||||
totalWidth += colWidth;
|
||||
specifiedColumns++;
|
||||
autoWidthColumns[colIndex]=PR_FALSE;
|
||||
if (PR_TRUE==gsDebug)
|
||||
printf ("from col, col %d set to width %d\n", colIndex, colWidth);
|
||||
}
|
||||
else
|
||||
{
|
||||
nsTableCellFrame *cellFrame = mTableFrame->GetCellFrameAt(0, colIndex);
|
||||
if (nsnull!=cellFrame)
|
||||
{
|
||||
// Get the cell's style
|
||||
const nsStylePosition* cellPosition;
|
||||
cellFrame->GetStyleData(eStyleStruct_Position, (nsStyleStruct*&)cellPosition);
|
||||
|
||||
// Get fixed column width if it has one
|
||||
if (eStyleUnit_Coord==cellPosition->mWidth.GetUnit())
|
||||
{
|
||||
PRInt32 colSpan = mTableFrame->GetEffectiveColSpan(colIndex, cellFrame);
|
||||
nscoord effectiveWidth = cellPosition->mWidth.GetCoordValue()/colSpan;
|
||||
mTableFrame->SetColumnWidth(colIndex, effectiveWidth);
|
||||
totalWidth += effectiveWidth;
|
||||
specifiedColumns++;
|
||||
autoWidthColumns[colIndex]=PR_FALSE;
|
||||
if (PR_TRUE==gsDebug)
|
||||
printf ("from cell, col %d set to width %d\n", colIndex, effectiveWidth);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// for every column that did not have a specified width, compute its width from the remaining space
|
||||
if (mNumCols > specifiedColumns)
|
||||
{
|
||||
// Get the table's style
|
||||
const nsStylePosition* tablePosition;
|
||||
mTableFrame->GetStyleData(eStyleStruct_Position, (nsStyleStruct*&)tablePosition);
|
||||
if (eStyleUnit_Coord==tablePosition->mWidth.GetUnit())
|
||||
{
|
||||
nscoord specifiedTableWidth = tablePosition->mWidth.GetCoordValue();
|
||||
nscoord remainingTableWidth = specifiedTableWidth - totalWidth;
|
||||
if (PR_TRUE==gsDebug)
|
||||
printf ("%p: specifiedTW=%d, remainingTW=%d\n",
|
||||
mTableFrame, specifiedTableWidth, remainingTableWidth);
|
||||
if (0<remainingTableWidth)
|
||||
{
|
||||
nscoord widthPerColumn = remainingTableWidth/(mNumCols-specifiedColumns);
|
||||
for (colIndex = 0; colIndex<mNumCols; colIndex++)
|
||||
{
|
||||
if (PR_TRUE==autoWidthColumns[colIndex])
|
||||
{
|
||||
mTableFrame->SetColumnWidth(colIndex, widthPerColumn);
|
||||
totalWidth += widthPerColumn;
|
||||
if (PR_TRUE==gsDebug)
|
||||
printf ("auto col %d set to width %d\n", colIndex, widthPerColumn);
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
// min/MaxTW is max of (specified table width, sum of specified column(cell) widths)
|
||||
mMinTableWidth = mMaxTableWidth = totalWidth;
|
||||
if (PR_TRUE==gsDebug)
|
||||
printf ("%p: aMinTW=%d, aMaxTW=%d\n", mTableFrame, mMinTableWidth, mMaxTableWidth);
|
||||
|
||||
// clean up
|
||||
if (nsnull!=autoWidthColumns)
|
||||
{
|
||||
delete [] autoWidthColumns;
|
||||
}
|
||||
|
||||
return PR_TRUE;
|
||||
}
|
||||
|
||||
|
||||
|
||||
|
||||
|
|
@ -0,0 +1,85 @@
|
|||
/* -*- 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.
|
||||
*/
|
||||
|
||||
#ifndef FixedTableLayoutStrategy_h__
|
||||
#define FixedTableLayoutStrategy_h__
|
||||
|
||||
#include "nscore.h"
|
||||
#include "BasicTableLayoutStrategy.h"
|
||||
#include "nsCoord.h"
|
||||
|
||||
class nsVoidArray;
|
||||
class nsTableFrame;
|
||||
struct nsStylePosition;
|
||||
|
||||
|
||||
/* ---------- FixedTableLayoutStrategy ---------- */
|
||||
|
||||
/** Implementation of HTML4 "table-layout=fixed" table layout.
|
||||
* The input to this class is the resolved styles for both the
|
||||
* table columns and the cells in row0.
|
||||
* The output from this class is to set the column widths in
|
||||
* mTableFrame.
|
||||
*/
|
||||
class FixedTableLayoutStrategy : public BasicTableLayoutStrategy
|
||||
{
|
||||
public:
|
||||
|
||||
/** Public constructor.
|
||||
* @paran aFrame the table frame for which this delegate will do layout
|
||||
* @param aNumCols the total number of columns in the table
|
||||
*/
|
||||
FixedTableLayoutStrategy(nsTableFrame *aFrame, PRInt32 aNumCols);
|
||||
|
||||
/** destructor */
|
||||
virtual ~FixedTableLayoutStrategy();
|
||||
|
||||
/** no need to override Initialize since it calls our AssignPreliminaryColumnWidths */
|
||||
// virtual PRBool Initialize(nsSize* aMaxElementSize);
|
||||
|
||||
/** Called during resize reflow to determine the new column widths
|
||||
* @param aTableStyle - the resolved style for mTableFrame
|
||||
* @param aReflowState - the reflow state for mTableFrame
|
||||
* @param aMaxWidth - the computed max width for columns to fit into
|
||||
*/
|
||||
virtual PRBool BalanceColumnWidths(nsIStyleContext * aTableStyle,
|
||||
const nsReflowState& aReflowState,
|
||||
nscoord aMaxWidth);
|
||||
|
||||
protected:
|
||||
/* assign the width of all columns
|
||||
* if there is a colframe with a width attribute, use it as the column width.
|
||||
* otherwise if there is a cell in the first row and it has a width attribute, use it.
|
||||
* if this cell includes a colspan, width is divided equally among spanned columns
|
||||
* otherwise the cell get a proportion of the remaining space.
|
||||
* as determined by the table width attribute. If no table width attribute, it gets 0 width
|
||||
* Computes the minimum and maximum table widths.
|
||||
*
|
||||
* Set column width information in each column frame and in the table frame.
|
||||
*
|
||||
* @return PR_TRUE if all is well, PR_FALSE if there was an unrecoverable error
|
||||
*
|
||||
*/
|
||||
virtual PRBool AssignPreliminaryColumnWidths();
|
||||
|
||||
|
||||
};
|
||||
|
||||
|
||||
#endif
|
||||
|
||||
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