gecko-dev/layout/tables/nsTablePainter.h

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is TableBackgroundPainter interface.
*
* The Initial Developer of the Original Code is
* Elika J. Etemad ("fantasai") <fantasai@inkedblade.net>.
* Portions created by the Initial Developer are Copyright (C) 2004
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsTablePainter_h__
#define nsTablePainter_h__
#include "celldata.h"
// flags for Paint, PaintChild, PaintChildren are currently only used by tables.
//Table-based paint call; not a direct call as with views
#define NS_PAINT_FLAG_TABLE_BG_PAINT 0x00000001
//Cells should paint their backgrounds only, no children
#define NS_PAINT_FLAG_TABLE_CELL_BG_PASS 0x00000002
#include "nsIFrame.h"
class nsTableFrame;
class nsTableRowGroupFrame;
class nsTableRowFrame;
class nsTableCellFrame;
class TableBackgroundPainter
{
/*
* Helper class for painting table backgrounds
*
*/
public:
enum Origin { eOrigin_Table, eOrigin_TableRowGroup, eOrigin_TableRow };
/** Public constructor
* @param aTableFrame - the table's table frame
* @param aOrigin - what type of table frame is creating this instance
* @param aPresContext - the presentation context
* @param aRenderingContext - the rendering context
* @param aDirtyRect - the area that needs to be painted,
* relative to aRenderingContext
* @param aPt - offset of the table frame relative to
* aRenderingContext
*/
TableBackgroundPainter(nsTableFrame* aTableFrame,
Origin aOrigin,
nsPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
const nsPoint& aPt);
/** Destructor */
~TableBackgroundPainter();
/* ~*~ The Border Collapse Painting Issue ~*~
In border-collapse, the *table* paints the cells' borders,
so we need to make sure the backgrounds get painted first
(underneath) by doing a cell-background-only painting pass.
*/
/* ~*~ Using nsTablePainter Background Painting ~*~
A call to PaintTable will normally paint all of the table's
elements (except the cells in non-BC). Elements with views
however, will be skipped and must create their own painter
to call the appropriate paint function in their ::Paint
method (e.g. painter.PaintRow in nsTableRow::Paint)
*/
/** Paint background for the table frame and its children down through cells
* (Cells themselves will only be painted in border collapse)
* Table must do a flagged TABLE_BG_PAINT ::Paint call on its
* children afterwards
* @param aTableFrame - the table frame
* @param aDeflate - deflation needed to bring table's mRect
* to the outer grid lines in border-collapse
*/
nsresult PaintTable(nsTableFrame* aTableFrame, nsMargin* aDeflate);
/** Paint background for the row group and its children down through cells
* (Cells themselves will only be painted in border collapse)
* Standards mode only
* Table Row Group must do a flagged TABLE_BG_PAINT ::Paint call on its
* children afterwards
* @param aFrame - the table row group frame
*/
nsresult PaintRowGroup(nsTableRowGroupFrame* aFrame)
{ return PaintRowGroup(aFrame, PR_FALSE); }
/** Paint background for the row and its children down through cells
* (Cells themselves will only be painted in border collapse)
* Standards mode only
* Table Row must do a flagged TABLE_BG_PAINT ::Paint call on its
* children afterwards
* @param aFrame - the table row frame
*/
nsresult PaintRow(nsTableRowFrame* aFrame)
{ return PaintRow(aFrame, PR_FALSE); }
private:
/** Paint table frame's background
* @param aTableFrame - the table frame
* @param aFirstRowGroup - the first (in layout order) row group
* may be null
* @param aLastRowGroup - the last (in layout order) row group
* may be null
* @param aDeflate - adjustment to frame's rect (used for quirks BC)
* may be null
*/
nsresult PaintTableFrame(nsTableFrame* aTableFrame,
nsTableRowGroupFrame* aFirstRowGroup,
nsTableRowGroupFrame* aLastRowGroup,
nsMargin* aDeflate = nsnull);
/* aPassThrough params indicate whether to paint the element or to just
* pass through and paint underlying layers only
* See Public versions for function descriptions
*/
nsresult PaintRowGroup(nsTableRowGroupFrame* aFrame,
PRBool aPassThrough);
nsresult PaintRow(nsTableRowFrame* aFrame,
PRBool aPassThrough);
/** Paint table background layers for this cell space
* Also paints cell's own background in border-collapse mode
* @param aFrame - the cell
* @param aPassSelf - pass this cell; i.e. paint only underlying layers
*/
nsresult PaintCell(nsTableCellFrame* aFrame,
PRBool aPassSelf);
/** Translate mRenderingContext, mDirtyRect, and mCols' column and
* colgroup coords
* @param aDX - origin's x-coord change
* @param aDY - origin's y-coord change
*/
void TranslateContext(nscoord aDX,
nscoord aDY);
struct TableBackgroundData;
friend struct TableBackgroundData;
struct TableBackgroundData {
nsIFrame* mFrame;
/** mRect is the rect of mFrame in the current coordinate system */
nsRect mRect;
const nsStyleBackground* mBackground;
const nsStyleBorder* mBorder;
/** Data is valid & frame is visible */
PRBool IsVisible() const { return mBackground != nsnull; }
/** Constructor */
TableBackgroundData();
/** Destructor */
~TableBackgroundData();
/** Destroys synthesized data. MUST be called before destructor
* @param aPresContext - the pres context
*/
void Destroy(nsPresContext* aPresContext);
/** Clear background data */
void Clear();
/** Calculate and set all data values to represent aFrame */
void SetFull(nsIFrame* aFrame);
/** Set frame data (mFrame, mRect) but leave style data empty */
void SetFrame(nsIFrame* aFrame);
/** Calculate the style data for mFrame */
void SetData();
/** True if need to set border-collapse border; must call SetFull beforehand */
PRBool ShouldSetBCBorder();
/** Set border-collapse border with aBorderWidth as widths */
nsresult SetBCBorder(nsMargin& aBorderWidth,
TableBackgroundPainter* aPainter);
private:
nsStyleBorder* mSynthBorder;
};
struct ColData;
friend struct ColData;
struct ColData {
TableBackgroundData mCol;
TableBackgroundData* mColGroup; //link to col's parent colgroup's data (owned by painter)
ColData() {
mColGroup = nsnull;
}
};
nsPresContext* mPresContext;
nsIRenderingContext& mRenderingContext;
nsPoint mRenderPt;
nsRect mDirtyRect;
#ifdef DEBUG
nsCompatibility mCompatMode;
#endif
PRBool mIsBorderCollapse;
Origin mOrigin; //user's table frame type
ColData* mCols; //array of columns' ColData
PRUint32 mNumCols;
TableBackgroundData mRowGroup; //current row group
TableBackgroundData mRow; //current row
nsRect mCellRect; //current cell's rect
nsStyleBorder mZeroBorder; //cached zero-width border
};
#endif