gecko-dev/layout/tables/nsTableRowFrame.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 nsTableRowFrame_h__
#define nsTableRowFrame_h__
#include "nscore.h"
#include "nsHTMLContainerFrame.h"
class nsTableFrame;
class nsTableCellFrame;
struct RowReflowState;
/**
* nsTableRowFrame is the frame that maps table rows
* (HTML tag TR). This class cannot be reused
* outside of an nsTableRowGroupFrame. It assumes that its parent is an nsTableRowGroupFrame,
* and its children are nsTableCellFrames.
*
* @see nsTableFrame
* @see nsTableRowGroupFrame
* @see nsTableCellFrame
*/
class nsTableRowFrame : public nsHTMLContainerFrame
{
public:
NS_IMETHOD Init(nsIPresContext& aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
/** Initialization of data */
NS_IMETHOD InitChildren(PRInt32 aRowIndex=-1);
void ResetInitChildren();
/** instantiate a new instance of nsTableRowFrame.
* @param aResult the new object is returned in this out-param
* @param aContent the table object to map
* @param aParent the parent of the new frame
*
* @return NS_OK if the frame was properly allocated, otherwise an error code
*/
friend nsresult
NS_NewTableRowFrame(nsIFrame*& aResult);
/** @see nsIFrame::Paint */
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
/** ask all children to paint themselves, without clipping (for cells with rowspan>1)
* @see nsIFrame::Paint
*/
virtual void PaintChildren(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
/** calls Reflow for all of its child cells.
* Cells with rowspan=1 are all set to the same height and stacked horizontally.
* <P> Cells are not split unless absolutely necessary.
* <P> Cells are resized in nsTableFrame::BalanceColumnWidths
* and nsTableFrame::ShrinkWrapChildren
*
* @param aDesiredSize width set to width of the sum of the cells, height set to
* height of cells with rowspan=1.
*
* @see nsIFrame::Reflow
* @see nsTableFrame::BalanceColumnWidths
* @see nsTableFrame::ShrinkWrapChildren
*/
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
virtual void DidResize(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState);
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::tableRowFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
NS_IMETHOD GetFrameName(nsString& aResult) const;
/** set mTallestCell to 0 in anticipation of recalculating it */
void ResetMaxChildHeight();
/** set mTallestCell to max(mTallestCell, aChildHeight) */
void SetMaxChildHeight(nscoord aChildHeight, nscoord aCellTopMargin, nscoord aCellBottomMargin);
/** returns the tallest child in this row (ignoring any cell with rowspans) */
nscoord GetTallestChild() const;
nscoord GetChildMaxTopMargin() const;
nscoord GetChildMaxBottomMargin() const;
PRInt32 GetMaxColumns() const;
/** returns the ordinal position of this row in its table */
virtual PRInt32 GetRowIndex() const;
/** set this row's starting row index */
void SetRowIndex (int aRowIndex);
virtual PRBool Contains(const nsPoint& aPoint);
/** used by yje row group frame code */
void ReflowCellFrame(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsTableCellFrame* aCellFrame,
nscoord aAvailableHeight,
nsReflowStatus& aStatus);
void InsertCellFrame(nsTableCellFrame* aFrame, nsTableCellFrame* aPrevSibling);
protected:
/** protected constructor.
* @see NewFrame
*/
nsTableRowFrame();
/** implement abstract method on nsHTMLContainerFrame */
virtual PRIntn GetSkipSides() const;
/** Incremental Reflow attempts to do column balancing with the minimum number of reflow
* commands to child elements. This is done by processing the reflow command,
* rebalancing column widths (if necessary), then comparing the resulting column widths
* to the prior column widths and reflowing only those cells that require a reflow.
*
* @see Reflow
*/
NS_IMETHOD IncrementalReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD IR_TargetIsChild(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame * aNextFrame);
NS_IMETHOD IR_TargetIsMe(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD IR_CellInserted(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableCellFrame * aInsertedFrame,
PRBool aReplace);
NS_IMETHOD IR_CellAppended(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableCellFrame * aAppendedFrame);
NS_IMETHOD IR_DidAppendCell(nsTableCellFrame *aRowFrame);
NS_IMETHOD IR_CellRemoved(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableCellFrame * aDeletedFrame);
NS_IMETHOD IR_StyleChanged(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus);
// row-specific methods
void GetMinRowSpan(nsTableFrame *aTableFrame);
void FixMinCellHeight(nsTableFrame *aTableFrame);
NS_IMETHOD RecoverState(nsIPresContext& aPresContext,
RowReflowState& aState,
nsIFrame* aKidFrame,
nscoord& aMaxCellTopMargin,
nscoord& aMaxCellBottomMargin);
void PlaceChild(nsIPresContext& aPresContext,
RowReflowState& aState,
nsIFrame* aKidFrame,
const nsRect& aKidRect,
nsSize* aMaxElementSize,
nsSize* aKidMaxElementSize);
nscoord ComputeCellXOffset(const RowReflowState& aState,
nsIFrame* aKidFrame,
const nsMargin& aKidMargin) const;
nscoord ComputeCellAvailWidth(const RowReflowState& aState,
nsIFrame* aKidFrame) const;
nsIFrame * GetFirstChildForDirection(PRUint8 aDir);
nsIFrame * GetNextChildForDirection(PRUint8 aDir, nsIFrame *aCurrentChild);
/**
* Called for a resize reflow. Typically because the column widths have
* changed. Reflows all the existing table cell frames
*/
NS_IMETHOD ResizeReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus);
/**
* Called for the initial reflow. Creates each table cell frame, and
* reflows the cell frame to gets its minimum and maximum sizes
*/
NS_IMETHOD InitialReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
RowReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableCellFrame * aStartFrame,
PRBool aDoSiblings);
private:
PRInt32 mRowIndex;
nscoord mTallestCell; // not my height, but the height of my tallest child
nscoord mCellMaxTopMargin;
nscoord mCellMaxBottomMargin;
PRInt32 mMinRowSpan; // the smallest row span among all my child cells
PRBool mInitializedChildren; // PR_TRUE if child cells have been initialized
// (for now, that means "added to the table", and
// is NOT the same as having nsIFrame::Init() called.)
};
inline PRInt32 nsTableRowFrame::GetRowIndex() const
{
NS_ASSERTION(0<=mRowIndex, "bad state: row index");
return (mRowIndex);
}
inline void nsTableRowFrame::SetRowIndex (int aRowIndex)
{
mRowIndex = aRowIndex;
}
inline void nsTableRowFrame::ResetInitChildren()
{ mInitializedChildren=PR_FALSE; }
#endif