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354 lines
12 KiB
C++
354 lines
12 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef nsTableCellFrame_h__
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#define nsTableCellFrame_h__
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#include "nsITableCellLayout.h"
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#include "nscore.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsTableRowFrame.h" // need to actually include this here to inline GetRowIndex
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#include "nsIStyleContext.h"
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struct nsStyleSpacing;
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class nsTableFrame;
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class nsHTMLValue;
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/**
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* Additional frame-state bits
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*/
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#define NS_TABLE_CELL_FRAME_CONTENT_EMPTY 0x80000000
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/**
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* nsTableCellFrame
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* data structure to maintain information about a single table cell's frame
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*
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* NOTE: frames are not ref counted. We expose addref and release here
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* so we can change that decsion in the future. Users of nsITableCellLayout
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* should refcount correctly as if this object is being ref counted, though
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* no actual support is under the hood.
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*
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* @author sclark
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*/
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class nsTableCellFrame : public nsHTMLContainerFrame, public nsITableCellLayout
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{
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public:
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// nsISupports
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NS_DECL_ISUPPORTS_INHERITED
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// default constructor supplied by the compiler
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nsTableCellFrame();
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~nsTableCellFrame();
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NS_IMETHOD Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD AttributeChanged(nsIPresContext* aPresContext,
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nsIContent* aChild,
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PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aHint);
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// table cells contain an area frame which does most of the work, and
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// so these functions should never be called. They assert and return
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// NS_ERROR_NOT_IMPLEMENTED
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NS_IMETHOD AppendFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aFrameList);
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NS_IMETHOD InsertFrames(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsIFrame* aFrameList);
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NS_IMETHOD RemoveFrame(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIAtom* aListName,
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nsIFrame* aOldFrame);
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void InitCellFrame(PRInt32 aColIndex);
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void SetBorderEdge(PRUint8 aSide,
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PRInt32 aRowIndex,
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PRInt32 aColIndex,
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nsBorderEdge *border,
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nscoord aOddAmountToAdd);
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void SetBorderEdgeLength(PRUint8 aSide,
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PRInt32 aIndex,
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nscoord aLength);
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/** instantiate a new instance of nsTableCellFrame.
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* @param aResult the new object is returned in this out-param
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*
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* @return NS_OK if the frame was properly allocated, otherwise an error code
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*/
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friend nsresult
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NS_NewTableCellFrame(nsIPresShell* aPresShell, nsIFrame** aResult);
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NS_IMETHOD Paint(nsIPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer);
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NS_IMETHOD GetFrameForPoint(nsIPresContext* aPresContext,
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const nsPoint& aPoint,
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nsFramePaintLayer aWhichLayer,
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nsIFrame** aFrame);
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NS_IMETHOD SetSelected(nsIPresContext* aPresContext,
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nsIDOMRange *aRange,
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PRBool aSelected,
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nsSpread aSpread);
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NS_IMETHOD Reflow(nsIPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsReflowStatus& aStatus);
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/**
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* Get the "type" of the frame
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*
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* @see nsLayoutAtoms::tableCellFrame
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*/
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NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsString& aResult) const;
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NS_IMETHOD SizeOf(nsISizeOfHandler* aSizer, PRUint32* aResult) const;
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#endif
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virtual void VerticallyAlignChild(nsIPresContext* aPresContext,
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const nsHTMLReflowState& aReflowState);
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/**
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* return the cell's specified row span. this is what was specified in the
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* content model or in the style info, and is always >= 1.
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* to get the effective row span (the actual value that applies), use GetEffectiveRowSpan()
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* @see nsTableFrame::GetEffectiveRowSpan()
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*/
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virtual PRInt32 GetRowSpan();
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// there is no set row index because row index depends on the cell's parent row only
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/*---------------- nsITableCellLayout methods ------------------------*/
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/**
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* return the cell's starting row index (starting at 0 for the first row).
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* for continued cell frames the row index is that of the cell's first-in-flow
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* and the column index (starting at 0 for the first column
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*/
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NS_IMETHOD GetCellIndexes(PRInt32 &aRowIndex, PRInt32 &aColIndex);
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/** return the mapped cell's row index (starting at 0 for the first row) */
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virtual nsresult GetRowIndex(PRInt32 &aRowIndex) const;
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/** return the previous cell having the same column index as current cell
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* returns null if no cell is present (but nsresult is still NS_OK)
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* (When used within layout, you can QI aCellLayout to get an nsIFrame*)
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*/
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NS_IMETHOD GetPreviousCellInColumn(nsITableCellLayout **aCellLayout);
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/** return the next cell having the same column index
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* returns null if no cell is present (but nsresult is still NS_OK)
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* (When used within layout, you can QI aCellLayout to get an nsIFrame*)
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*/
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NS_IMETHOD GetNextCellInColumn(nsITableCellLayout **aCellLayout);
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/**
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* return the cell's specified col span. this is what was specified in the
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* content model or in the style info, and is always >= 1.
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* to get the effective col span (the actual value that applies), use GetEffectiveColSpan()
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* @see nsTableFrame::GetEffectiveColSpan()
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*/
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virtual PRInt32 GetColSpan();
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/** return the cell's column index (starting at 0 for the first column) */
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virtual nsresult GetColIndex(PRInt32 &aColIndex) const;
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virtual nsresult SetColIndex(PRInt32 aColIndex);
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/** return the available width given to this frame during its last reflow */
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virtual nscoord GetPriorAvailWidth();
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/** set the available width given to this frame during its last reflow */
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virtual void SetPriorAvailWidth(nscoord aPriorAvailWidth);
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/** return the desired size returned by this frame during its last reflow */
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virtual nsSize GetDesiredSize();
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/** set the desired size returned by this frame during its last reflow */
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virtual void SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize);
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/** return the maximum width of the cell */
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virtual nscoord GetMaximumWidth() const;
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/** set the maximum width of the cell */
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virtual void SetMaximumWidth(nscoord aMaximumWidth);
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/** return the MaxElement size returned by this frame during its last reflow
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* not counting reflows where MaxElementSize is not requested.
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* That is, the cell frame will always remember the last non-null MaxElementSize
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*/
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virtual nsSize GetPass1MaxElementSize() const;
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/** set the MaxElement size returned by this frame during its last reflow.
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* should never be called with a null MaxElementSize
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*/
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virtual void SetPass1MaxElementSize(const nsSize & aMaxElementSize);
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PRBool GetContentEmpty();
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void SetContentEmpty(PRBool aContentEmpty);
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// The collapse offset is (0,0) except for cells originating in a row/col which is collapsed
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void SetCollapseOffsetX(nsIPresContext* aPresContext, nscoord aXOffset);
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void SetCollapseOffsetY(nsIPresContext* aPresContext, nscoord aYOffset);
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void GetCollapseOffset(nsIPresContext* aPresContext, nsPoint& aOffset);
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protected:
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/** implement abstract method on nsHTMLContainerFrame */
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virtual PRIntn GetSkipSides() const;
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virtual PRBool ParentDisablesSelection() const; //override default behavior
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private:
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// All these methods are support methods for RecalcLayoutData
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nsIFrame* GetFrameAt(nsVoidArray* aList, PRInt32 aIndex);
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//XXX: aTableFrame can be removed as soon as border-collapse inherits correctly
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void GetCellBorder(nsMargin &aBorder, nsTableFrame *aTableFrame);
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PRUint8 GetOpposingEdge(PRUint8 aEdge);
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protected:
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// Subclass hook for style post processing
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NS_IMETHOD DidSetStyleContext(nsIPresContext* aPresContext);
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void MapBorderPadding(nsIPresContext* aPresContext);
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void MapHTMLBorderStyle(nsIPresContext* aPresContext,
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nsStyleSpacing& aSpacingStyle,
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nsTableFrame* aTableFrame);
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void MapVAlignAttribute(nsIPresContext* aPresContext, nsTableFrame *aTableFrame);
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void MapHAlignAttribute(nsIPresContext* aPresContext, nsTableFrame *aTableFrame);
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PRBool ConvertToPixelValue(nsHTMLValue& aValue, PRInt32 aDefault, PRInt32& aResult);
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protected:
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/** the starting column for this cell */
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int mColIndex;
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/** the available width we were given in our previous reflow */
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nscoord mPriorAvailWidth;
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/** these are the last computed desired and max element sizes */
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nsSize mDesiredSize;
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/** these are the Pass 1 maximum width and max element sizes */
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nscoord mMaximumWidth;
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nsSize mPass1MaxElementSize;
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public:
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nsBorderEdges *mBorderEdges; // one list of border segments for each side of the table frame
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// used only for the collapsing border model
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};
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inline nsresult nsTableCellFrame::GetRowIndex(PRInt32 &aRowIndex) const
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{
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nsTableCellFrame* cell = (nsTableCellFrame*)GetFirstInFlow();
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nsresult result;
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nsTableRowFrame * row;
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cell->GetParent((nsIFrame **)&row);
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if (nsnull!=row)
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{
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aRowIndex = row->GetRowIndex();
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result = NS_OK;
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}
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else
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{
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aRowIndex = 0;
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result = NS_ERROR_NOT_INITIALIZED;
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}
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return result;
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}
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inline nsresult nsTableCellFrame::GetColIndex(PRInt32 &aColIndex) const
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{
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aColIndex = mColIndex;
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return NS_OK;
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}
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inline nscoord nsTableCellFrame::GetPriorAvailWidth()
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{ return mPriorAvailWidth;}
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inline void nsTableCellFrame::SetPriorAvailWidth(nscoord aPriorAvailWidth)
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{ mPriorAvailWidth = aPriorAvailWidth;}
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inline nsSize nsTableCellFrame::GetDesiredSize()
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{ return mDesiredSize; }
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inline void nsTableCellFrame::SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize)
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{
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mDesiredSize.width = aDesiredSize.width;
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mDesiredSize.height = aDesiredSize.height;
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}
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inline nscoord nsTableCellFrame::GetMaximumWidth() const
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{ return mMaximumWidth; }
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inline void nsTableCellFrame::SetMaximumWidth(nscoord aMaximumWidth)
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{
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mMaximumWidth = aMaximumWidth;
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}
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inline nsSize nsTableCellFrame::GetPass1MaxElementSize() const
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{ return mPass1MaxElementSize; }
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inline PRBool nsTableCellFrame::GetContentEmpty()
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{
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return (mState & NS_TABLE_CELL_FRAME_CONTENT_EMPTY) ==
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NS_TABLE_CELL_FRAME_CONTENT_EMPTY;
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}
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inline void nsTableCellFrame::SetContentEmpty(PRBool aContentEmpty)
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{
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if (aContentEmpty) {
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mState |= NS_TABLE_CELL_FRAME_CONTENT_EMPTY;
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} else {
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mState &= ~NS_TABLE_CELL_FRAME_CONTENT_EMPTY;
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}
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}
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#endif
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