forked from mirrors/gecko-dev
575 lines
21 KiB
C++
575 lines
21 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef nsCellMap_h__
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#define nsCellMap_h__
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#include "nscore.h"
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#include "celldata.h"
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#include "nsTArray.h"
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#include "nsCOMPtr.h"
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#include "nsAlgorithm.h"
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#include "nsRect.h"
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#include <algorithm>
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#include "TableArea.h"
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#undef DEBUG_TABLE_CELLMAP
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class nsTableCellFrame;
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class nsTableRowFrame;
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class nsTableRowGroupFrame;
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class nsTableFrame;
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class nsCellMap;
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class nsPresContext;
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class nsCellMapColumnIterator;
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struct nsColInfo {
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int32_t mNumCellsOrig; // number of cells originating in the col
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int32_t mNumCellsSpan; // number of cells spanning into the col via colspans
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// (not rowspans)
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nsColInfo();
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nsColInfo(int32_t aNumCellsOrig, int32_t aNumCellsSpan);
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};
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struct BCInfo {
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nsTArray<BCData> mIEndBorders;
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nsTArray<BCData> mBEndBorders;
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BCData mBEndIEndCorner;
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};
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class nsTableCellMap {
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typedef mozilla::TableArea TableArea;
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public:
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nsTableCellMap(nsTableFrame& aTableFrame, bool aBorderCollapse);
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/** destructor
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* NOT VIRTUAL BECAUSE THIS CLASS SHOULD **NEVER** BE SUBCLASSED
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*/
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~nsTableCellMap();
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void RemoveGroupCellMap(nsTableRowGroupFrame* aRowGroup);
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void InsertGroupCellMap(nsTableRowGroupFrame* aNewRowGroup,
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nsTableRowGroupFrame*& aPrevRowGroup);
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/**
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* Get the nsCellMap for the given row group. If aStartHint is non-null,
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* will start looking with that cellmap and only fall back to starting at the
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* beginning of the list if that doesn't find us the right nsCellMap.
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* Otherwise, just start at the beginning.
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*
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* aRowGroup must not be null.
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*/
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nsCellMap* GetMapFor(const nsTableRowGroupFrame* aRowGroup,
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nsCellMap* aStartHint) const;
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/** synchronize the cellmaps with the rowgroups again **/
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void Synchronize(nsTableFrame* aTableFrame);
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nsTableCellFrame* GetCellFrame(int32_t aRowIndex, int32_t aColIndex,
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CellData& aData, bool aUseRowIfOverlap) const;
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/** return the CellData for the cell at (aRowIndex, aColIndex) */
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CellData* GetDataAt(int32_t aRowIndex, int32_t aColIndex) const;
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// this function creates a col if needed
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nsColInfo* GetColInfoAt(int32_t aColIndex);
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/** append the cellFrame at the end of the row at aRowIndex and return the col
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* index
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*/
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CellData* AppendCell(nsTableCellFrame& aCellFrame, int32_t aRowIndex,
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bool aRebuildIfNecessary, TableArea& aDamageArea);
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void InsertCells(nsTArray<nsTableCellFrame*>& aCellFrames, int32_t aRowIndex,
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int32_t aColIndexBefore, TableArea& aDamageArea);
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void RemoveCell(nsTableCellFrame* aCellFrame, int32_t aRowIndex,
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TableArea& aDamageArea);
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/** Remove the previously gathered column information */
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void ClearCols();
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void InsertRows(nsTableRowGroupFrame* aRowGroup,
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nsTArray<nsTableRowFrame*>& aRows, int32_t aFirstRowIndex,
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bool aConsiderSpans, TableArea& aDamageArea);
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void RemoveRows(int32_t aFirstRowIndex, int32_t aNumRowsToRemove,
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bool aConsiderSpans, TableArea& aDamageArea);
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int32_t GetNumCellsOriginatingInRow(int32_t aRowIndex) const;
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int32_t GetNumCellsOriginatingInCol(int32_t aColIndex) const;
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/** indicate whether the row has more than one cell that either originates
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* or is spanned from the rows above
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*/
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bool HasMoreThanOneCell(int32_t aRowIndex) const;
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int32_t GetEffectiveRowSpan(int32_t aRowIndex, int32_t aColIndex) const;
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int32_t GetEffectiveColSpan(int32_t aRowIndex, int32_t aColIndex) const;
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/** return the total number of columns in the table represented by this
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* CellMap */
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int32_t GetColCount() const;
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/** return the actual number of rows in the table represented by this CellMap
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*/
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int32_t GetRowCount() const;
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nsTableCellFrame* GetCellInfoAt(int32_t aRowX, int32_t aColX,
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bool* aOriginates = nullptr,
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int32_t* aColSpan = nullptr) const;
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/**
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* Returns the index at the given row and column coordinates.
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*
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* @see nsITableLayout::GetIndexByRowAndColumn()
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*
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* @param aRow [in] the row coordinate
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* @param aColumn [in] the column coordinate
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* @returns the index for the cell
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*/
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int32_t GetIndexByRowAndColumn(int32_t aRow, int32_t aColumn) const;
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/**
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* Retrieves the row and column coordinates for the given index.
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*
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* @see nsITableLayout::GetRowAndColumnByIndex()
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*
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* @param aIndex [in] the index for which coordinates are to be retrieved
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* @param aRow [out] the row coordinate to be returned
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* @param aColumn [out] the column coordinate to be returned
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*/
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void GetRowAndColumnByIndex(int32_t aIndex, int32_t* aRow,
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int32_t* aColumn) const;
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void AddColsAtEnd(uint32_t aNumCols);
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void RemoveColsAtEnd();
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bool RowIsSpannedInto(int32_t aRowIndex, int32_t aNumEffCols) const;
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bool RowHasSpanningCells(int32_t aRowIndex, int32_t aNumEffCols) const;
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void RebuildConsideringCells(nsCellMap* aCellMap,
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nsTArray<nsTableCellFrame*>* aCellFrames,
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int32_t aRowIndex, int32_t aColIndex,
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bool aInsert, TableArea& aDamageArea);
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protected:
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/**
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* Rebuild due to rows being inserted or deleted with cells spanning
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* into or out of the rows. This function can only handle insertion
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* or deletion but NOT both. So either aRowsToInsert must be null
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* or aNumRowsToRemove must be 0.
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*
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* // XXXbz are both allowed to happen? That'd be a no-op...
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*/
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void RebuildConsideringRows(nsCellMap* aCellMap, int32_t aStartRowIndex,
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nsTArray<nsTableRowFrame*>* aRowsToInsert,
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int32_t aNumRowsToRemove, TableArea& aDamageArea);
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public:
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void ResetBStartStart(mozilla::LogicalSide aSide, nsCellMap& aCellMap,
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uint32_t aRowGroupStart, uint32_t aYPos,
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uint32_t aXPos);
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void SetBCBorderEdge(mozilla::LogicalSide aEdge, nsCellMap& aCellMap,
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uint32_t aCellMapStart, uint32_t aYPos, uint32_t aXPos,
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uint32_t aLength, BCBorderOwner aOwner, nscoord aSize,
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bool aChanged);
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void SetBCBorderCorner(mozilla::LogicalCorner aCorner, nsCellMap& aCellMap,
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uint32_t aCellMapStart, uint32_t aYPos, uint32_t aXPos,
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mozilla::LogicalSide aOwner, nscoord aSubSize,
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bool aBevel, bool aIsBottomRight = false);
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/** dump a representation of the cell map to stdout for debugging */
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#ifdef DEBUG
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void Dump(char* aString = nullptr) const;
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#endif
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protected:
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BCData* GetIEndMostBorder(int32_t aRowIndex);
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BCData* GetBEndMostBorder(int32_t aColIndex);
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friend class nsCellMap;
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friend class BCMapCellIterator;
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friend class BCPaintBorderIterator;
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friend class nsCellMapColumnIterator;
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/** Insert a row group cellmap after aPrevMap, if aPrefMap is null insert it
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* at the beginning, the ordering of the cellmap corresponds to the ordering
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* of rowgroups once OrderRowGroups has been called
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*/
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void InsertGroupCellMap(nsCellMap* aPrevMap, nsCellMap& aNewMap);
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void DeleteIEndBEndBorders();
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nsTableFrame& mTableFrame;
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AutoTArray<nsColInfo, 8> mCols;
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nsCellMap* mFirstMap;
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// border collapsing info
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BCInfo* mBCInfo;
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};
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/**
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* It maintains an Rows x Columns grid onto which the cells of the table are
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* mapped. This makes processing of rowspan and colspan attributes much easier.
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* Each cell is represented by a CellData object.
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*
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* @see CellData
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* @see nsTableFrame::AddCellToMap
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* @see nsTableFrame::GrowCellMap
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* @see nsTableFrame::BuildCellIntoMap
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*
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* mRows is an array of rows. Each row is an array of cells. a cell
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* can be null.
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*/
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class nsCellMap {
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typedef mozilla::TableArea TableArea;
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public:
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/** constructor
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* @param aRowGroupFrame the row group frame this is a cellmap for
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* @param aIsBC whether the table is doing border-collapse
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*/
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nsCellMap(nsTableRowGroupFrame* aRowGroupFrame, bool aIsBC);
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/** destructor
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* NOT VIRTUAL BECAUSE THIS CLASS SHOULD **NEVER** BE SUBCLASSED
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*/
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~nsCellMap();
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static void Init();
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static void Shutdown();
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nsCellMap* GetNextSibling() const;
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void SetNextSibling(nsCellMap* aSibling);
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nsTableRowGroupFrame* GetRowGroup() const;
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nsTableCellFrame* GetCellFrame(int32_t aRowIndex, int32_t aColIndex,
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CellData& aData,
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bool aUseRowSpanIfOverlap) const;
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/**
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* Returns highest cell index within the cell map.
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*
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* @param aColCount [in] the number of columns in the table
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*/
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int32_t GetHighestIndex(int32_t aColCount);
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/**
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* Returns the index of the given row and column coordinates.
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*
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* @see nsITableLayout::GetIndexByRowAndColumn()
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*
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* @param aColCount [in] the number of columns in the table
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* @param aRow [in] the row coordinate
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* @param aColumn [in] the column coordinate
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*/
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int32_t GetIndexByRowAndColumn(int32_t aColCount, int32_t aRow,
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int32_t aColumn) const;
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/**
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* Get the row and column coordinates at the given index.
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*
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* @see nsITableLayout::GetRowAndColumnByIndex()
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*
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* @param aColCount [in] the number of columns in the table
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* @param aIndex [in] the index for which coordinates are to be retrieved
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* @param aRow [out] the row coordinate to be returned
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* @param aColumn [out] the column coordinate to be returned
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*/
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void GetRowAndColumnByIndex(int32_t aColCount, int32_t aIndex, int32_t* aRow,
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int32_t* aColumn) const;
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/** append the cellFrame at an empty or dead cell or finally at the end of
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* the row at aRowIndex and return a pointer to the celldata entry in the
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* cellmap
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*
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* @param aMap - reference to the table cell map
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* @param aCellFrame - a pointer to the cellframe which will be
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* appended to the row
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* @param aRowIndex - to this row the celldata entry will be added
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* @param aRebuildIfNecessay - if a cell spans into a row below it might be
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* necesserary to rebuild the cellmap as this
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* rowspan might overlap another cell.
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* @param aDamageArea - area in cellmap coordinates which have been
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* updated.
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* @param aColToBeginSearch - if not null contains the column number where
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* the search for a empty or dead cell in the
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* row should start
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* @return - a pointer to the celldata entry inserted into
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* the cellmap
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*/
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CellData* AppendCell(nsTableCellMap& aMap, nsTableCellFrame* aCellFrame,
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int32_t aRowIndex, bool aRebuildIfNecessary,
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int32_t aRgFirstRowIndex, TableArea& aDamageArea,
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int32_t* aBeginSearchAtCol = nullptr);
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void InsertCells(nsTableCellMap& aMap,
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nsTArray<nsTableCellFrame*>& aCellFrames, int32_t aRowIndex,
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int32_t aColIndexBefore, int32_t aRgFirstRowIndex,
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TableArea& aDamageArea);
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void RemoveCell(nsTableCellMap& aMap, nsTableCellFrame* aCellFrame,
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int32_t aRowIndex, int32_t aRgFirstRowIndex,
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TableArea& aDamageArea);
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void InsertRows(nsTableCellMap& aMap, nsTArray<nsTableRowFrame*>& aRows,
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int32_t aFirstRowIndex, bool aConsiderSpans,
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int32_t aRgFirstRowIndex, TableArea& aDamageArea);
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void RemoveRows(nsTableCellMap& aMap, int32_t aFirstRowIndex,
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int32_t aNumRowsToRemove, bool aConsiderSpans,
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int32_t aRgFirstRowIndex, TableArea& aDamageArea);
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int32_t GetNumCellsOriginatingInRow(int32_t aRowIndex) const;
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int32_t GetNumCellsOriginatingInCol(int32_t aColIndex) const;
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/** return the number of rows in the table represented by this CellMap */
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int32_t GetRowCount(bool aConsiderDeadRowSpanRows = false) const;
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nsTableCellFrame* GetCellInfoAt(const nsTableCellMap& aMap, int32_t aRowX,
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int32_t aColX, bool* aOriginates = nullptr,
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int32_t* aColSpan = nullptr) const;
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bool RowIsSpannedInto(int32_t aRowIndex, int32_t aNumEffCols) const;
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bool RowHasSpanningCells(int32_t aRowIndex, int32_t aNumEffCols) const;
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/** indicate whether the row has more than one cell that either originates
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* or is spanned from the rows above
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*/
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bool HasMoreThanOneCell(int32_t aRowIndex) const;
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/* Get the rowspan for a cell starting at aRowIndex and aColIndex.
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* If aGetEffective is true the size will not exceed the last content based
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* row. Cells can have a specified rowspan that extends below the last
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* content based row. This is legitimate considering incr. reflow where the
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* content rows will arive later.
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*/
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int32_t GetRowSpan(int32_t aRowIndex, int32_t aColIndex,
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bool aGetEffective) const;
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int32_t GetEffectiveColSpan(const nsTableCellMap& aMap, int32_t aRowIndex,
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int32_t aColIndex) const;
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typedef nsTArray<CellData*> CellDataArray;
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/** dump a representation of the cell map to stdout for debugging */
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#ifdef DEBUG
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void Dump(bool aIsBorderCollapse) const;
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#endif
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protected:
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friend class nsTableCellMap;
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friend class BCMapCellIterator;
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friend class BCPaintBorderIterator;
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friend class nsTableFrame;
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friend class nsCellMapColumnIterator;
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/**
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* Increase the number of rows in this cellmap by aNumRows. Put the
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* new rows at aRowIndex. If aRowIndex is -1, put them at the end.
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*/
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bool Grow(nsTableCellMap& aMap, int32_t aNumRows, int32_t aRowIndex = -1);
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void GrowRow(CellDataArray& aRow, int32_t aNumCols);
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/** assign aCellData to the cell at (aRow,aColumn) */
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void SetDataAt(nsTableCellMap& aMap, CellData& aCellData,
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int32_t aMapRowIndex, int32_t aColIndex);
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CellData* GetDataAt(int32_t aMapRowIndex, int32_t aColIndex) const;
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int32_t GetNumCellsIn(int32_t aColIndex) const;
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void ExpandWithRows(nsTableCellMap& aMap,
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nsTArray<nsTableRowFrame*>& aRowFrames,
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int32_t aStartRowIndex, int32_t aRgFirstRowIndex,
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TableArea& aDamageArea);
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void ExpandWithCells(nsTableCellMap& aMap,
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nsTArray<nsTableCellFrame*>& aCellFrames,
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int32_t aRowIndex, int32_t aColIndex, int32_t aRowSpan,
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bool aRowSpanIsZero, int32_t aRgFirstRowIndex,
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TableArea& aDamageArea);
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void ShrinkWithoutRows(nsTableCellMap& aMap, int32_t aFirstRowIndex,
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int32_t aNumRowsToRemove, int32_t aRgFirstRowIndex,
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TableArea& aDamageArea);
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void ShrinkWithoutCell(nsTableCellMap& aMap, nsTableCellFrame& aCellFrame,
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int32_t aRowIndex, int32_t aColIndex,
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int32_t aRgFirstRowIndex, TableArea& aDamageArea);
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/**
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* Rebuild due to rows being inserted or deleted with cells spanning
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* into or out of the rows. This function can only handle insertion
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* or deletion but NOT both. So either aRowsToInsert must be null
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* or aNumRowsToRemove must be 0.
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*
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* // XXXbz are both allowed to happen? That'd be a no-op...
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*/
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void RebuildConsideringRows(nsTableCellMap& aMap, int32_t aStartRowIndex,
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nsTArray<nsTableRowFrame*>* aRowsToInsert,
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int32_t aNumRowsToRemove);
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void RebuildConsideringCells(nsTableCellMap& aMap, int32_t aNumOrigCols,
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nsTArray<nsTableCellFrame*>* aCellFrames,
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int32_t aRowIndex, int32_t aColIndex,
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bool aInsert);
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bool CellsSpanOut(nsTArray<nsTableRowFrame*>& aNewRows) const;
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/** If a cell spans out of the area defined by aStartRowIndex, aEndRowIndex
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* and aStartColIndex, aEndColIndex the cellmap changes are more severe so
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* the corresponding routines needs to be called. This is also necessary if
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* cells outside spans into this region.
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* @aStartRowIndex - y start index
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* @aEndRowIndex - y end index
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* @param aStartColIndex - x start index
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* @param aEndColIndex - x end index
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* @return - true if a cell span crosses the border of the
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region
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*/
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bool CellsSpanInOrOut(int32_t aStartRowIndex, int32_t aEndRowIndex,
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int32_t aStartColIndex, int32_t aEndColIndex) const;
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bool CreateEmptyRow(int32_t aRowIndex, int32_t aNumCols);
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int32_t GetRowSpanForNewCell(nsTableCellFrame* aCellFrameToAdd,
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int32_t aRowIndex, bool& aIsZeroRowSpan) const;
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// Destroy a CellData struct. This will handle the case of aData
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// actually being a BCCellData properly.
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void DestroyCellData(CellData* aData);
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// Allocate a CellData struct. This will handle needing to create a
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// BCCellData properly.
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// @param aOrigCell the originating cell to pass to the celldata constructor
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CellData* AllocCellData(nsTableCellFrame* aOrigCell);
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/** an array containing, for each row, the CellDatas for the cells
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* in that row. It can be larger than mContentRowCount due to row spans
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* extending beyond the table */
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// XXXbz once we have auto TArrays, we should probably use them here.
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nsTArray<CellDataArray> mRows;
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/** the number of rows in the table (content) which is not indentical to the
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* number of rows in the cell map due to row spans extending beyond the end
|
|
* of thetable (dead rows) or empty tr tags
|
|
*/
|
|
int32_t mContentRowCount;
|
|
|
|
// the row group that corresponds to this map
|
|
nsTableRowGroupFrame* mRowGroupFrame;
|
|
|
|
// the next row group cell map
|
|
nsCellMap* mNextSibling;
|
|
|
|
// Whether this is a BC cellmap or not
|
|
bool mIsBC;
|
|
|
|
// Prescontext to deallocate and allocate celldata
|
|
RefPtr<nsPresContext> mPresContext;
|
|
};
|
|
|
|
/**
|
|
* A class for iterating the cells in a given column. Must be given a
|
|
* non-null nsTableCellMap and a column number valid for that cellmap.
|
|
*/
|
|
class nsCellMapColumnIterator {
|
|
public:
|
|
nsCellMapColumnIterator(const nsTableCellMap* aMap, int32_t aCol)
|
|
: mMap(aMap),
|
|
mCurMap(aMap->mFirstMap),
|
|
mCurMapStart(0),
|
|
mCurMapRow(0),
|
|
mCol(aCol),
|
|
mFoundCells(0),
|
|
mCurMapContentRowCount(0),
|
|
mCurMapRelevantRowCount(0) {
|
|
MOZ_ASSERT(aMap, "Must have map");
|
|
MOZ_ASSERT(mCol < aMap->GetColCount(), "Invalid column");
|
|
mOrigCells = aMap->GetNumCellsOriginatingInCol(mCol);
|
|
if (mCurMap) {
|
|
mCurMapContentRowCount = mCurMap->GetRowCount();
|
|
uint32_t rowArrayLength = mCurMap->mRows.Length();
|
|
mCurMapRelevantRowCount =
|
|
std::min(mCurMapContentRowCount, rowArrayLength);
|
|
if (mCurMapRelevantRowCount == 0 && mOrigCells > 0) {
|
|
// This row group is useless; advance!
|
|
AdvanceRowGroup();
|
|
}
|
|
}
|
|
#ifdef DEBUG
|
|
else {
|
|
NS_ASSERTION(mOrigCells == 0, "Why no rowgroups?");
|
|
}
|
|
#endif
|
|
}
|
|
|
|
nsTableCellFrame* GetNextFrame(int32_t* aRow, int32_t* aColSpan);
|
|
|
|
private:
|
|
void AdvanceRowGroup();
|
|
|
|
// Advance the row; aIncrement is considered to be a cell's rowspan,
|
|
// so if 0 is passed in we'll advance to the next rowgroup.
|
|
void IncrementRow(int32_t aIncrement);
|
|
|
|
const nsTableCellMap* mMap;
|
|
const nsCellMap* mCurMap;
|
|
|
|
// mCurMapStart is the row in the entire nsTableCellMap where
|
|
// mCurMap starts. This is used to compute row indices to pass to
|
|
// nsTableCellMap::GetDataAt, so must be a _content_ row index.
|
|
uint32_t mCurMapStart;
|
|
|
|
// In steady-state mCurMapRow is the row in our current nsCellMap
|
|
// that we'll use the next time GetNextFrame() is called. Due to
|
|
// the way we skip over rowspans, the entry in mCurMapRow and mCol
|
|
// is either null, dead, originating, or a colspan. In particular,
|
|
// it cannot be a rowspan or overlap entry.
|
|
uint32_t mCurMapRow;
|
|
const int32_t mCol;
|
|
uint32_t mOrigCells;
|
|
uint32_t mFoundCells;
|
|
|
|
// The number of content rows in mCurMap. This may be bigger than the number
|
|
// of "relevant" rows, or it might be smaller.
|
|
uint32_t mCurMapContentRowCount;
|
|
|
|
// The number of "relevant" rows in mCurMap. That is, the number of rows
|
|
// which might have an originating cell in them. Once mCurMapRow reaches
|
|
// mCurMapRelevantRowCount, we should move to the next map.
|
|
uint32_t mCurMapRelevantRowCount;
|
|
};
|
|
|
|
/* ----- inline methods ----- */
|
|
inline int32_t nsTableCellMap::GetColCount() const { return mCols.Length(); }
|
|
|
|
inline nsCellMap* nsCellMap::GetNextSibling() const { return mNextSibling; }
|
|
|
|
inline void nsCellMap::SetNextSibling(nsCellMap* aSibling) {
|
|
mNextSibling = aSibling;
|
|
}
|
|
|
|
inline nsTableRowGroupFrame* nsCellMap::GetRowGroup() const {
|
|
return mRowGroupFrame;
|
|
}
|
|
|
|
inline int32_t nsCellMap::GetRowCount(bool aConsiderDeadRowSpanRows) const {
|
|
int32_t rowCount =
|
|
(aConsiderDeadRowSpanRows) ? mRows.Length() : mContentRowCount;
|
|
return rowCount;
|
|
}
|
|
|
|
// nsColInfo
|
|
|
|
inline nsColInfo::nsColInfo() : mNumCellsOrig(0), mNumCellsSpan(0) {}
|
|
|
|
inline nsColInfo::nsColInfo(int32_t aNumCellsOrig, int32_t aNumCellsSpan)
|
|
: mNumCellsOrig(aNumCellsOrig), mNumCellsSpan(aNumCellsSpan) {}
|
|
|
|
#endif
|