pjs/layout/tables/nsTableCellFrame.h

338 строки
11 KiB
C++

/* -*- 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 1.1 (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/NPL/
*
* 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 mozilla.org code.
*
* The Initial Developer of the Original Code is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All
* Rights Reserved.
*
* Contributor(s):
*/
#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;
/**
* Additional frame-state bits
*/
#define NS_TABLE_CELL_FRAME_CONTENT_EMPTY 0x80000000
/**
* 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
nsTableCellFrame();
~nsTableCellFrame();
NS_IMETHOD Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
nsIContent* aChild,
PRInt32 aNameSpaceID,
nsIAtom* aAttribute,
PRInt32 aHint);
// 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(nsIPresShell* aPresShell, nsIFrame** aResult);
NS_IMETHOD Paint(nsIPresContext* aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
NS_IMETHOD SetSelected(nsIPresContext* aPresContext,
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;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsString& aResult) const;
NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const;
#endif
virtual void VerticallyAlignChild(nsIPresContext* aPresContext);
/**
* 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) const;
/**
* 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) const;
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 maximum width of the cell */
virtual nscoord GetMaximumWidth() const;
/** set the maximum width of the cell */
virtual void SetMaximumWidth(nscoord aMaximumWidth);
/** 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() const;
/** 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);
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(nsIPresContext* aPresContext, nscoord aXOffset);
void SetCollapseOffsetY(nsIPresContext* aPresContext, nscoord aYOffset);
void GetCollapseOffset(nsIPresContext* aPresContext, nsPoint& aOffset);
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);
protected:
// Subclass hook for style post processing
NS_IMETHOD DidSetStyleContext(nsIPresContext* aPresContext);
void MapBorderPadding(nsIPresContext* aPresContext);
void MapHTMLBorderStyle(nsIPresContext* aPresContext,
nsStyleSpacing& aSpacingStyle,
nsTableFrame* aTableFrame);
void MapVAlignAttribute(nsIPresContext* aPresContext, nsTableFrame *aTableFrame);
void MapHAlignAttribute(nsIPresContext* aPresContext, nsTableFrame *aTableFrame);
PRBool ConvertToPixelValue(nsHTMLValue& aValue, PRInt32 aDefault, PRInt32& aResult);
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;
/** these are the Pass 1 maximum width and max element sizes */
nscoord mMaximumWidth;
nsSize mPass1MaxElementSize;
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) const
{
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) const
{
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 nscoord nsTableCellFrame::GetMaximumWidth() const
{ return mMaximumWidth; }
inline void nsTableCellFrame::SetMaximumWidth(nscoord aMaximumWidth)
{
mMaximumWidth = aMaximumWidth;
}
inline nsSize nsTableCellFrame::GetPass1MaxElementSize() const
{ return mPass1MaxElementSize; }
inline PRBool nsTableCellFrame::GetContentEmpty()
{
return (mState & NS_TABLE_CELL_FRAME_CONTENT_EMPTY) ==
NS_TABLE_CELL_FRAME_CONTENT_EMPTY;
}
inline void nsTableCellFrame::SetContentEmpty(PRBool aContentEmpty)
{
if (aContentEmpty) {
mState |= NS_TABLE_CELL_FRAME_CONTENT_EMPTY;
} else {
mState &= ~NS_TABLE_CELL_FRAME_CONTENT_EMPTY;
}
}
#endif