gecko-dev/layout/tables/nsTableRowGroupFrame.h

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C
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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 nsTableRowGroupFrame_h__
#define nsTableRowGroupFrame_h__
#include "nscore.h"
#include "nsContainerFrame.h"
#include "nsIAtom.h"
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struct RowGroupReflowState;
/**
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* 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
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*
* @author sclark
*/
class nsTableRowGroupFrame : public nsContainerFrame
{
public:
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/** instantiate a new instance of nsTableRowGroupFrame.
* @param aInstancePtrResult 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
*/
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static nsresult NewFrame(nsIFrame** aInstancePtrResult,
nsIContent* aContent,
nsIFrame* aParent);
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/** @see nsIFrame::Paint */
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
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/** ask all children to paint themselves, without clipping (for cells with rowspan>1)
* @see nsIFrame::Paint
*/
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virtual void PaintChildren(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect);
/** calls Reflow for all of its child rows.
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* 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
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*/
NS_IMETHOD Reflow(nsIPresContext* aPresContext,
nsReflowMetrics& aDesiredSize,
const nsReflowState& aReflowState,
nsReflowStatus& aStatus);
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/** @see nsContainerFrame::CreateContinuingFrame */
NS_IMETHOD CreateContinuingFrame(nsIPresContext* aPresContext,
nsIFrame* aParent,
nsIStyleContext* aStyleContext,
nsIFrame*& aContinuingFrame);
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/** returns the type of the mapped row group content in aType.
* caller MUST call release on the returned object if it is not null.
*
* @param aType out param filled with the type of the mapped content, or null if none.
*
* @return NS_OK
*/
NS_IMETHOD GetRowGroupType(nsIAtom *& aType);
// For DEBUGGING Purposes Only
NS_IMETHOD MoveTo(nscoord aX, nscoord aY);
NS_IMETHOD SizeTo(nscoord aWidth, nscoord aHeight);
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protected:
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/** protected constructor.
* @see NewFrame
*/
nsTableRowGroupFrame(nsIContent* aContent, nsIFrame* aParentFrame);
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/** protected destructor */
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~nsTableRowGroupFrame();
nscoord GetTopMarginFor(nsIPresContext* aCX,
RowGroupReflowState& aState,
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const nsMargin& aKidMargin);
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void PlaceChild( nsIPresContext* aPresContext,
RowGroupReflowState& aState,
nsIFrame* aKidFrame,
const nsRect& aKidRect,
nsSize* aMaxElementSize,
nsSize& aKidMaxElementSize);
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/**
* Reflow the frames we've already created
*
* @param aPresContext presentation context to use
* @param aState 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
*/
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PRBool ReflowMappedChildren(nsIPresContext* aPresContext,
RowGroupReflowState& aState,
nsSize* aMaxElementSize);
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/**
* Try and pull-up frames from our next-in-flow
*
* @param aPresContext presentation context to use
* @param aState current inline state
* @return true if we successfully pulled-up all the children and false
* otherwise, e.g. child didn't fit
*/
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PRBool PullUpChildren(nsIPresContext* aPresContext,
RowGroupReflowState& aState,
nsSize* aMaxElementSize);
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/**
* Create new frames for content we haven't yet mapped
*
* @param aPresContext presentation context to use
* @param aState current inline state
* @return frComplete if all content has been mapped and frNotComplete
* if we should be continued
*/
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nsReflowStatus ReflowUnmappedChildren(nsIPresContext* aPresContext,
RowGroupReflowState& aState,
nsSize* aMaxElementSize);
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private:
nsIAtom *mType;
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};
#endif