gecko-dev/layout/tables/nsTableRowGroupFrame.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 1.1 (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 nsTableRowGroupFrame_h__
#define nsTableRowGroupFrame_h__
#include "nscore.h"
#include "nsHTMLContainerFrame.h"
#include "nsIAtom.h"
#include "nsILineIterator.h"
class nsTableFrame;
class nsTableRowFrame;
class nsTableCellFrame;
#ifdef DEBUG_TABLE_REFLOW_TIMING
class nsReflowTimer;
#endif
struct nsRowGroupReflowState {
const nsHTMLReflowState& reflowState; // Our reflow state
nsTableFrame* tableFrame;
nsReflowReason reason;
// The available size (computed from the parent)
nsSize availSize;
// Running y-offset
nscoord y;
nsRowGroupReflowState(const nsHTMLReflowState& aReflowState,
nsTableFrame* aTableFrame)
:reflowState(aReflowState), tableFrame(aTableFrame)
{
availSize.width = reflowState.availableWidth;
availSize.height = reflowState.availableHeight;
reason = reflowState.reason;
y = 0;
}
~nsRowGroupReflowState() {}
};
#define NS_ITABLEROWGROUPFRAME_IID \
{ 0xe940e7bc, 0xb534, 0x11d2, \
{ 0x95, 0xa2, 0x0, 0x60, 0xb0, 0xc3, 0x44, 0x14 } }
// use a bit from nsFrame's frame state bits to determine whether a
// thead or tfoot should be repeated on every printed page
#define NS_ROWGROUP_REPEATABLE 0x80000000
/**
* nsTableRowGroupFrame is the frame that maps row groups
* (HTML tags THEAD, TFOOT, and TBODY). This class cannot be reused
* outside of an nsTableFrame. It assumes that its parent is an nsTableFrame, and
* its children are nsTableRowFrames.
*
* @see nsTableFrame
* @see nsTableRowFrame
*/
class nsTableRowGroupFrame : public nsHTMLContainerFrame, public nsILineIteratorNavigator
{
public:
// nsISupports
NS_DECL_ISUPPORTS_INHERITED
// default constructor supplied by the compiler
/** instantiate a new instance of nsTableRowGroupFrame.
* @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_NewTableRowGroupFrame(nsIPresShell* aPresShell, nsIFrame** aResult);
virtual ~nsTableRowGroupFrame();
NS_IMETHOD Init(nsIPresContext* aPresContext,
nsIContent* aContent,
nsIFrame* aParent,
nsIStyleContext* aContext,
nsIFrame* aPrevInFlow);
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);
/** @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);
/**
* Find the correct descendant frame.
* Return PR_TRUE if a frame containing the point is found.
* @see nsContainerFrame::GetFrameForPoint
*/
NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext, const nsPoint& aPoint, nsFramePaintLayer aWhichLayer, nsIFrame** aFrame);
/** calls Reflow for all of its child rows.
* Rows are all set to the same width and stacked vertically.
* <P> rows are not split unless absolutely necessary.
*
* @param aDesiredSize width set to width of rows, height set to
* sum of height of rows that fit in aMaxSize.height.
*
* @see nsIFrame::Reflow
*/
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
/**
* Get the "type" of the frame
*
* @see nsLayoutAtoms::tableRowGroupFrame
*/
NS_IMETHOD GetFrameType(nsIAtom** aType) const;
#ifdef DEBUG
NS_IMETHOD GetFrameName(nsString& aResult) const;
NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const;
#endif
/** return the number of child rows (not necessarily == number of child frames) */
PRInt32 GetRowCount();
/** return the table-relative row index of the first row in this rowgroup.
* if there are no rows, -1 is returned.
*/
PRInt32 GetStartRowIndex();
/**
* Used for header and footer row group frames that are repeated when
* splitting a table frame.
*
* Performs any table specific initialization
*
* @param aHeaderFooterFrame the original header or footer row group frame
* that was repeated
*/
nsresult InitRepeatedFrame(nsIPresContext* aPresContext,
nsTableRowGroupFrame* aHeaderFooterFrame);
/**
* Get the total height of all the row rects
*/
nscoord GetHeightOfRows(nsIPresContext* aPresContext);
// nsILineIterator methods
public:
NS_IMETHOD GetNumLines(PRInt32* aResult);
NS_IMETHOD GetDirection(PRBool* aIsRightToLeft);
NS_IMETHOD GetLine(PRInt32 aLineNumber,
nsIFrame** aFirstFrameOnLine,
PRInt32* aNumFramesOnLine,
nsRect& aLineBounds,
PRUint32* aLineFlags);
NS_IMETHOD FindLineContaining(nsIFrame* aFrame, PRInt32* aLineNumberResult);
NS_IMETHOD FindLineAt(nscoord aY, PRInt32* aLineNumberResult);
NS_IMETHOD FindFrameAt(PRInt32 aLineNumber,
nscoord aX,
#ifdef IBMBIDI
PRBool aCouldBeReordered,
#endif
nsIFrame** aFrameFound,
PRBool* aXIsBeforeFirstFrame,
PRBool* aXIsAfterLastFrame);
#ifdef IBMBIDI
NS_IMETHOD CheckLineOrder(PRInt32 aLine,
PRBool *aIsReordered,
nsIFrame **aFirstVisual,
nsIFrame **aLastVisual);
#endif
NS_IMETHOD GetNextSiblingOnLine(nsIFrame*& aFrame, PRInt32 aLineNumber);
protected:
nsTableRowGroupFrame();
/** implement abstract method on nsHTMLContainerFrame */
virtual PRIntn GetSkipSides() const;
void PlaceChild(nsIPresContext* aPresContext,
nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame,
nsHTMLReflowMetrics& aDesiredSize);
void CalculateRowHeights(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState);
/** 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,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD IR_TargetIsChild(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame* aNextFrame);
NS_IMETHOD IR_TargetIsMe(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD IR_StyleChanged(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus);
nsresult AdjustSiblingsAfterReflow(nsIPresContext* aPresContext,
nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame,
nscoord aDeltaY);
nsresult RecoverState(nsRowGroupReflowState& aReflowState,
nsIFrame* aKidFrame);
/**
* Reflow the frames we've already created
*
* @param aPresContext presentation context to use
* @param aReflowState current inline state
* @return true if we successfully reflowed all the mapped children and false
* otherwise, e.g. we pushed children to the next in flow
*/
NS_METHOD ReflowChildren(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
nsRowGroupReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableRowFrame* aStartFrame,
PRBool aDirtyOnly = PR_FALSE);
/**
* Pull-up all the row frames from our next-in-flow
*/
NS_METHOD PullUpAllRowFrames(nsIPresContext* aPresContext);
nsresult SplitRowGroup(nsIPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsTableFrame* aTableFrame,
nsReflowStatus& aStatus);
nscoord SplitSpanningCells(nsIPresContext& aPresContext,
const nsHTMLReflowState& aReflowState,
nsIStyleSet& aStyleSet,
nsTableFrame& aTableFrame,
nsTableRowFrame& aRowFrame,
nscoord aRowEndY,
nsTableRowFrame* aContRowFrame);
void CreateContinuingRowFrame(nsIPresContext& aPresContext,
nsIStyleSet& aStyleSet,
nsIFrame& aRowFrame,
nsIFrame** aContRowFrame);
PRBool IsSimpleRowFrame(nsTableFrame* aTableFrame,
nsIFrame* aFrame);
void GetNextRowSibling(nsIFrame** aRowFrame);
public:
virtual nsIFrame* GetFirstFrame() { return mFrames.FirstChild(); };
virtual nsIFrame* GetLastFrame() { return mFrames.LastChild(); };
virtual void GetNextFrame(nsIFrame* aFrame,
nsIFrame** aResult) { aFrame->GetNextSibling(aResult); };
PRBool IsRepeatable();
void SetRepeatable(PRBool aRepeatable);
#ifdef DEBUG_TABLE_REFLOW_TIMING
public:
nsReflowTimer* mTimer;
#endif
};
inline PRBool nsTableRowGroupFrame::IsRepeatable()
{
return (mState & NS_ROWGROUP_REPEATABLE) == NS_ROWGROUP_REPEATABLE;
}
inline void nsTableRowGroupFrame::SetRepeatable(PRBool aRepeatable)
{
if (aRepeatable) {
mState |= NS_ROWGROUP_REPEATABLE;
} else {
mState &= ~NS_ROWGROUP_REPEATABLE;
}
}
#endif