pjs/layout/tables/nsTableCellFrame.h

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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.
*/
#ifndef nsTableCellFrame_h__
#define nsTableCellFrame_h__
#include "nsITableCellLayout.h"
#include "nscore.h"
#include "nsHTMLContainerFrame.h"
#include "nsTableRowFrame.h" // need to actually include this here to inline GetRowIndex
#include "nsIStyleContext.h"
struct nsStyleSpacing;
class nsTableFrame;
class nsHTMLValue;
/**
* nsTableCellFrame
* data structure to maintain information about a single table cell's frame
*
* NOTE: frames are not ref counted. We expose addref and release here
* so we can change that decsion in the future. Users of nsITableCellLayout
* should refcount correctly as if this object is being ref counted, though
* no actual support is under the hood.
*
* @author sclark
*/
class nsTableCellFrame : public nsHTMLContainerFrame, public nsITableCellLayout
{
public:
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
// default constructor supplied by the compiler
NS_IMETHOD Init(nsIPresContext& aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
// table cells contain an area frame which does most of the work, and
// so these functions should never be called. They assert and return
// NS_ERROR_NOT_IMPLEMENTED
NS_IMETHOD AppendFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aFrameList);
NS_IMETHOD InsertFrames(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsIFrame* aFrameList);
NS_IMETHOD RemoveFrame(nsIPresContext& aPresContext,
nsIPresShell& aPresShell,
nsIAtom* aListName,
nsIFrame* aOldFrame);
void InitCellFrame(PRInt32 aColIndex);
void SetBorderEdge(PRUint8 aSide,
PRInt32 aRowIndex,
PRInt32 aColIndex,
nsBorderEdge *border,
nscoord aOddAmountToAdd);
void SetBorderEdgeLength(PRUint8 aSide,
PRInt32 aIndex,
nscoord aLength);
/** instantiate a new instance of nsTableCellFrame.
* @param aResult the new object is returned in this out-param
*
* @return NS_OK if the frame was properly allocated, otherwise an error code
*/
friend nsresult
NS_NewTableCellFrame(nsIFrame** aResult);
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD SetSelected(nsIDOMRange *aRange,PRBool aSelected, nsSpread aSpread);
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::tableCellFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
NS_IMETHOD GetFrameName(nsString& aResult) const;
virtual void VerticallyAlignChild();
/**
* return the cell's specified row span. this is what was specified in the
* content model or in the style info, and is always >= 1.
* to get the effective row span (the actual value that applies), use GetEffectiveRowSpan()
* @see nsTableFrame::GetEffectiveRowSpan()
*/
virtual PRInt32 GetRowSpan();
// there is no set row index because row index depends on the cell's parent row only
/*---------------- nsITableCellLayout methods ------------------------*/
/**
* return the cell's starting row index (starting at 0 for the first row).
* for continued cell frames the row index is that of the cell's first-in-flow
* and the column index (starting at 0 for the first column
*/
NS_IMETHOD GetCellIndexes(PRInt32 &aRowIndex, PRInt32 &aColIndex);
/** return the mapped cell's row index (starting at 0 for the first row) */
virtual nsresult GetRowIndex(PRInt32 &aRowIndex);
/**
* return the cell's specified col span. this is what was specified in the
* content model or in the style info, and is always >= 1.
* to get the effective col span (the actual value that applies), use GetEffectiveColSpan()
* @see nsTableFrame::GetEffectiveColSpan()
*/
virtual PRInt32 GetColSpan();
/** return the cell's column index (starting at 0 for the first column) */
virtual nsresult GetColIndex(PRInt32 &aColIndex);
virtual nsresult SetColIndex(PRInt32 aColIndex);
/** return the available width given to this frame during its last reflow */
virtual nscoord GetPriorAvailWidth();
/** set the available width given to this frame during its last reflow */
virtual void SetPriorAvailWidth(nscoord aPriorAvailWidth);
/** return the desired size returned by this frame during its last reflow */
virtual nsSize GetDesiredSize();
/** set the desired size returned by this frame during its last reflow */
virtual void SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize);
/** return the desired size returned by this frame during its last reflow */
virtual nsSize GetPass1DesiredSize();
/** set the desired size returned by this frame during its last reflow */
virtual void SetPass1DesiredSize(const nsHTMLReflowMetrics & aDesiredSize);
/** return the MaxElement size returned by this frame during its last reflow
* not counting reflows where MaxElementSize is not requested.
* That is, the cell frame will always remember the last non-null MaxElementSize
*/
virtual nsSize GetPass1MaxElementSize();
/** set the MaxElement size returned by this frame during its last reflow.
* should never be called with a null MaxElementSize
*/
virtual void SetPass1MaxElementSize(const nsSize & aMaxElementSize);
void RecalcLayoutData(nsTableFrame* aTableFrame,
nsVoidArray* aBoundaryCells[4]);
NS_IMETHOD GetMargin(nsMargin& aMargin);
PRBool GetContentEmpty();
void SetContentEmpty(PRBool aContentEmpty);
// The collapse offset is (0,0) except for cells originating in a row/col which is collapsed
void SetCollapseOffsetX(nscoord aXOffset);
void SetCollapseOffsetY(nscoord aYOffset);
nsPoint GetCollapseOffset();
protected:
/** implement abstract method on nsHTMLContainerFrame */
virtual PRIntn GetSkipSides() const;
virtual PRBool ParentDisablesSelection() const; //override default behavior
private:
// All these methods are support methods for RecalcLayoutData
nsIFrame* GetFrameAt(nsVoidArray* aList, PRInt32 aIndex);
nscoord GetMargin(nsIFrame* aFrame, PRUint8 aEdge) const;
//XXX: aTableFrame can be removed as soon as border-collapse inherits correctly
void GetCellBorder(nsMargin &aBorder, nsTableFrame *aTableFrame);
PRUint8 GetOpposingEdge(PRUint8 aEdge);
void CalculateBorders(nsTableFrame* aTableFrame,
nsVoidArray* aBoundaryCells[4]);
nscoord FindLargestMargin(nsVoidArray* aList,PRUint8 aEdge);
void CalculateMargins(nsTableFrame* aTableFrame,
nsVoidArray* aBoundaryCells[4]);
protected:
// Subclass hook for style post processing
NS_IMETHOD DidSetStyleContext(nsIPresContext* aPresContext);
void MapBorderMarginPadding(nsIPresContext* aPresContext);
void MapHTMLBorderStyle(nsIPresContext* aPresContext,
nsStyleSpacing& aSpacingStyle,
nscoord aBorderWidth,
nsTableFrame* aTableFrame);
void MapVAlignAttribute(nsIPresContext* aPresContext, nsTableFrame *aTableFrame);
void MapHAlignAttribute(nsIPresContext* aPresContext, nsTableFrame *aTableFrame);
PRBool ConvertToPixelValue(nsHTMLValue& aValue, PRInt32 aDefault, PRInt32& aResult);
NS_IMETHOD IR_StyleChanged(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
protected:
/** the starting column for this cell */
int mColIndex;
/** the available width we were given in our previous reflow */
nscoord mPriorAvailWidth;
/** these are the last computed desired and max element sizes */
nsSize mDesiredSize;
nsSize mMaxElementSize;
/** these are the Pass 1 unconstrained desired and max element sizes */
nsSize mPass1DesiredSize;
nsSize mPass1MaxElementSize;
nsresult mCalculated;
nsMargin mMargin;
PRBool mIsContentEmpty; // PR_TRUE if the cell's contents take up no space
//XXX: mIsContentEmpty should get yanked in favor of using free a bit on the frame base class
// the FrameState slot (mState; GetFrameState/SetFrameState)
nsPoint mCollapseOffset;
public:
nsBorderEdges mBorderEdges; // one list of border segments for each side of the table frame
// used only for the collapsing border model
};
inline nsresult nsTableCellFrame::GetRowIndex(PRInt32 &aRowIndex)
{
nsTableCellFrame* cell = (nsTableCellFrame*)GetFirstInFlow();
nsresult result;
nsTableRowFrame * row;
cell->GetParent((nsIFrame **)&row);
if (nsnull!=row)
{
aRowIndex = row->GetRowIndex();
result = NS_OK;
}
else
{
aRowIndex = 0;
result = NS_ERROR_NOT_INITIALIZED;
}
return result;
}
inline nsresult nsTableCellFrame::GetColIndex(PRInt32 &aColIndex)
{
aColIndex = mColIndex;
return NS_OK;
}
inline nscoord nsTableCellFrame::GetPriorAvailWidth()
{ return mPriorAvailWidth;}
inline void nsTableCellFrame::SetPriorAvailWidth(nscoord aPriorAvailWidth)
{ mPriorAvailWidth = aPriorAvailWidth;}
inline nsSize nsTableCellFrame::GetDesiredSize()
{ return mDesiredSize; }
inline void nsTableCellFrame::SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize)
{
mDesiredSize.width = aDesiredSize.width;
mDesiredSize.height = aDesiredSize.height;
}
inline nsSize nsTableCellFrame::GetPass1DesiredSize()
{ return mPass1DesiredSize; }
inline void nsTableCellFrame::SetPass1DesiredSize(const nsHTMLReflowMetrics & aDesiredSize)
{
mPass1DesiredSize.width = aDesiredSize.width;
mPass1DesiredSize.height = aDesiredSize.height;
}
inline nsSize nsTableCellFrame::GetPass1MaxElementSize()
{ return mPass1MaxElementSize; }
inline void nsTableCellFrame::SetPass1MaxElementSize(const nsSize & aMaxElementSize)
{
mPass1MaxElementSize.width = aMaxElementSize.width;
mPass1MaxElementSize.height = aMaxElementSize.height;
}
inline void nsTableCellFrame::CalculateBorders(nsTableFrame* aTableFrame,
nsVoidArray* aBoundaryCells[4])
{
}
inline NS_METHOD nsTableCellFrame::GetMargin(nsMargin& aMargin)
{
if (mCalculated == NS_OK)
{
aMargin = mMargin;
return NS_OK;
}
return NS_ERROR_NOT_INITIALIZED;
}
inline PRBool nsTableCellFrame::GetContentEmpty()
{
return mIsContentEmpty;
}
inline void nsTableCellFrame::SetContentEmpty(PRBool aContentEmpty)
{
mIsContentEmpty = aContentEmpty;
}
#endif