gecko-dev/layout/tables/nsTableColGroupFrame.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 nsTableColGroupFrame_h__
#define nsTableColGroupFrame_h__
#include "nscore.h"
#include "nsHTMLContainerFrame.h"
class nsTableColFrame;
/**
* nsTableColGroupFrame
* data structure to maintain information about a single table cell's frame
*
* @author sclark
*/
class nsTableColGroupFrame : public nsHTMLContainerFrame
{
public:
// default constructor supplied by the compiler
/** instantiate a new instance of nsTableColGroupFrame.
* @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_NewTableColGroupFrame(nsIFrame*& aResult);
NS_IMETHOD SetInitialChildList(nsIPresContext& aPresContext,
nsIAtom* aListName,
nsIFrame* aChildList);
NS_IMETHOD Paint(nsIPresContext& aPresContext,
nsIRenderingContext& aRenderingContext,
const nsRect& aDirtyRect,
nsFramePaintLayer aWhichLayer);
/** reflow of a column group is a trivial matter of reflowing
* the col group's children (columns), and setting this frame
* to 0-size. Since tables are row-centric, column group frames
* don't play directly in the rendering game. They do however
* maintain important state that effects table and cell layout.
*/
NS_IMETHOD Reflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD GetFrameName(nsString& aResult) const;
/** returns the number of columns represented by this group.
* if there are col children, count them (taking into account the span of each)
* else, check my own span attribute.
*/
virtual PRInt32 GetColumnCount();
virtual nsTableColFrame * GetFirstColumn();
virtual nsTableColFrame * GetNextColumn(nsIFrame *aChildFrame);
virtual nsTableColFrame * GetColumnAt(PRInt32 aColIndex);
virtual PRInt32 GetStartColumnIndex();
/** sets mStartColIndex to aIndex.
* @return the col count
* has the side effect of setting all child COL indexes
*/
virtual PRInt32 SetStartColumnIndex(PRInt32 aIndex);
/** helper method to get the span attribute for this colgroup */
PRInt32 GetSpan();
/** helper method returns PR_TRUE if this colgroup exists without any
* colgroup or col content in the table backing it.
*/
//PRBool IsManufactured();
protected:
/** implement abstract method on nsHTMLContainerFrame */
virtual PRIntn GetSkipSides() const;
/** Hook for style post processing.
* Since we need to know the full column structure before the COLS attribute
* can be interpreted, we can't just use DidSetStyleContext
*/
NS_IMETHOD SetStyleContextForFirstPass(nsIPresContext& aPresContext);
NS_IMETHOD InitNewFrames(nsIPresContext& aPresContext, nsIFrame* aChildList);
NS_IMETHOD AppendNewFrames(nsIPresContext& aPresContext, nsIFrame* aChildList);
NS_IMETHOD IncrementalReflow(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD IR_TargetIsMe(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD IR_ColInserted(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableColFrame * aInsertedFrame,
PRBool aReplace);
NS_IMETHOD IR_ColAppended(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableColFrame * aAppendedFrame);
NS_IMETHOD IR_ColRemoved(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsTableColFrame * aDeletedFrame);
NS_IMETHOD IR_StyleChanged(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
NS_IMETHOD IR_TargetIsChild(nsIPresContext& aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus,
nsIFrame * aNextFrame);
// data members
PRInt32 mColCount;
/** the starting column index this col group represents. Must be >= 0. */
PRInt32 mStartColIndex;
};
inline int nsTableColGroupFrame::GetStartColumnIndex ()
{ return mStartColIndex;}
#endif