326 lines
12 KiB
C++
326 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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 1.1 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the NPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the NPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsTableRowFrame_h__
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#define nsTableRowFrame_h__
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#include "nscore.h"
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#include "nsHTMLContainerFrame.h"
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class nsTableFrame;
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class nsTableCellFrame;
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#ifdef DEBUG_TABLE_REFLOW_TIMING
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class nsReflowTimer;
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#endif
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#define NS_TABLE_MAX_ROW_INDEX (1<<19)
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#define NS_ROW_FRAME_PAINT_SKIP_ROW 0x00000001
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#define NS_ROW_FRAME_PAINT_SKIP_CELLS 0x00000002
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/**
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* nsTableRowFrame is the frame that maps table rows
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* (HTML tag TR). This class cannot be reused
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* outside of an nsTableRowGroupFrame. It assumes that its parent is an nsTableRowGroupFrame,
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* and its children are nsTableCellFrames.
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*
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* @see nsTableFrame
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* @see nsTableRowGroupFrame
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* @see nsTableCellFrame
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*/
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class nsTableRowFrame : public nsHTMLContainerFrame
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{
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public:
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virtual ~nsTableRowFrame();
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NS_IMETHOD Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList);
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NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList);
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NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame);
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/** instantiate a new instance of nsTableRowFrame.
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* @param aResult the new object is returned in this out-param
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* @param aContent the table object to map
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* @param aParent the parent of the new frame
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*
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* @return NS_OK if the frame was properly allocated, otherwise an error code
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*/
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friend nsresult
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NS_NewTableRowFrame(nsIPresShell* aPresShell, nsIFrame** aResult);
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/** @see nsIFrame::Paint */
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NS_IMETHOD Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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/** ask all children to paint themselves, without clipping (for cells with rowspan>1)
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* @see nsIFrame::Paint
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*/
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virtual void PaintChildren(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext,
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const nsPoint& aPoint,
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nsFramePaintLayer aWhichLayer,
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nsIFrame** aFrame);
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/** calls Reflow for all of its child cells.
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* Cells with rowspan=1 are all set to the same height and stacked horizontally.
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* <P> Cells are not split unless absolutely necessary.
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* <P> Cells are resized in nsTableFrame::BalanceColumnWidths
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* and nsTableFrame::ShrinkWrapChildren
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*
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* @param aDesiredSize width set to width of the sum of the cells, height set to
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* height of cells with rowspan=1.
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*
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* @see nsIFrame::Reflow
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* @see nsTableFrame::BalanceColumnWidths
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* @see nsTableFrame::ShrinkWrapChildren
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*/
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NS_IMETHOD Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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virtual void DidResize(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState);
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/**
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* Get the "type" of the frame
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*
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* @see nsLayoutAtoms::tableRowFrame
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*/
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NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsString& aResult) const;
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NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer,
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PRUint32* aResult) const;
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#endif
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void SetTallestCell(nscoord aHeight,
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nscoord aAscent,
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nscoord aDescent,
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nsTableFrame* aTableFrame = nsnull,
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nsTableCellFrame* aCellFrame = nsnull);
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void ResetTallestCell(nscoord aRowStyleHeight);
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// calculate the tallest child when the previous tallest child gets shorter
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void CalcTallestCell();
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/** returns the tallest child in this row (ignoring any cell with rowspans) */
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nscoord GetTallestCell() const;
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// Support for cells with 'vertical-align: baseline'.
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/**
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* returns the max-ascent amongst all the cells that have
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* 'vertical-align: baseline', *including* cells with rowspans.
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* returns 0 if we don't have any cell with 'vertical-align: baseline'
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*/
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nscoord GetMaxCellAscent() const;
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#if 0 // nobody uses this
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/**
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* returns the max-descent amongst all the cells that have
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* 'vertical-align: baseline', *ignoring* any cell with rowspans.
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* returns 0 if we don't have any cell with 'vertical-align: baseline'
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*/
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nscoord GetMaxCellDescent() const;
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#endif
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/** returns the ordinal position of this row in its table */
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virtual PRInt32 GetRowIndex() const;
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/** set this row's starting row index */
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void SetRowIndex (int aRowIndex);
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virtual PRBool Contains(nsIPresContext* aPresContext, const nsPoint& aPoint);
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/** used by row group frame code */
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nscoord ReflowCellFrame(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsTableCellFrame* aCellFrame,
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nscoord aAvailableHeight,
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nsReflowStatus& aStatus);
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void InsertCellFrame(nsTableCellFrame* aFrame,
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nsTableCellFrame* aPrevSibling);
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void InsertCellFrame(nsTableCellFrame* aFrame,
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PRInt32 aColIndex);
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void RemoveCellFrame(nsTableCellFrame* aFrame);
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nsresult CalculateCellActualSize(nsIFrame* aRowFrame,
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nscoord& aDesiredWidth,
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nscoord& aDesiredHeight,
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nscoord aAvailWidth);
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PRBool IsFirstInserted() const;
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void SetFirstInserted(PRBool aValue);
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protected:
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/** protected constructor.
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* @see NewFrame
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*/
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nsTableRowFrame();
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/** implement abstract method on nsHTMLContainerFrame */
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virtual PRIntn GetSkipSides() const;
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/** Incremental Reflow attempts to do column balancing with the minimum number of reflow
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* commands to child elements. This is done by processing the reflow command,
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* rebalancing column widths (if necessary), then comparing the resulting column widths
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* to the prior column widths and reflowing only those cells that require a reflow.
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*
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* @see Reflow
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*/
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NS_IMETHOD IncrementalReflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame& aTableFrame,
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nsReflowStatus& aStatus);
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NS_IMETHOD IR_TargetIsChild(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame& aTableFrame,
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nsReflowStatus& aStatus,
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nsIFrame* aNextFrame);
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NS_IMETHOD IR_TargetIsMe(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame& aTableFrame,
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nsReflowStatus& aStatus);
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NS_IMETHOD IR_StyleChanged(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame& aTableFrame,
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nsReflowStatus& aStatus);
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// row-specific methods
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void GetMinRowSpan(nsTableFrame *aTableFrame);
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void FixMinCellHeight(nsTableFrame *aTableFrame);
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nscoord ComputeCellXOffset(const nsHTMLReflowState& aState,
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nsIFrame* aKidFrame,
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const nsMargin& aKidMargin) const;
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/**
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* Called for incremental/dirty and resize reflows. If aDirtyOnly is true then
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* only reflow dirty cells.
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*/
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NS_IMETHOD ReflowChildren(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame& aTableFrame,
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nsReflowStatus& aStatus,
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PRBool aDirtyOnly = PR_FALSE);
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public:
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struct RowBits {
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int mRowIndex:20;
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unsigned mMinRowSpan:11; // the smallest row span among all my child cells
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unsigned mFirstInserted; // if true, then it was the top most newly inserted row
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};
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private:
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union {
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PRUint32 mAllBits;
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RowBits mBits;
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};
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nscoord mTallestCell; // not my height, but the height of my tallest child
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// max-ascent and max-descent amongst all cells that have 'vertical-align: baseline'
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nscoord mMaxCellAscent; // does include cells with rowspan > 1
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nscoord mMaxCellDescent; // does *not* include cells with rowspan > 1
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#ifdef DEBUG_TABLE_REFLOW_TIMING
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public:
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nsReflowTimer* mTimer;
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#endif
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};
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inline PRInt32 nsTableRowFrame::GetRowIndex() const
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{
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return PRInt32(mBits.mRowIndex);
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}
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inline void nsTableRowFrame::SetRowIndex (int aRowIndex)
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{
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NS_PRECONDITION(aRowIndex < NS_TABLE_MAX_ROW_INDEX, "unexpected row index");
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mBits.mRowIndex = aRowIndex;
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}
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inline PRBool nsTableRowFrame::IsFirstInserted() const
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{
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return PRBool(mBits.mFirstInserted);
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}
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inline void nsTableRowFrame::SetFirstInserted(PRBool aValue)
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{
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mBits.mFirstInserted = aValue;
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}
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#endif
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