зеркало из https://github.com/mozilla/pjs.git
267 строки
10 KiB
C++
267 строки
10 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 License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef nsTableRowFrame_h__
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#define nsTableRowFrame_h__
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#include "nscore.h"
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#include "nsHTMLContainerFrame.h"
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class nsTableFrame;
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class nsTableCellFrame;
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struct RowReflowState;
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/**
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* nsTableRowFrame is the frame that maps table rows
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* (HTML tag TR). This class cannot be reused
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* outside of an nsTableRowGroupFrame. It assumes that its parent is an nsTableRowGroupFrame,
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* and its children are nsTableCellFrames.
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*
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* @see nsTableFrame
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* @see nsTableRowGroupFrame
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* @see nsTableCellFrame
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*/
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class nsTableRowFrame : public nsHTMLContainerFrame
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{
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public:
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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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/** Initialization of data */
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NS_IMETHOD InitChildren(PRInt32 aRowIndex=-1);
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void ResetInitChildren();
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/** instantiate a new instance of nsTableRowFrame.
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* @param aResult the new object is returned in this out-param
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* @param aContent the table object to map
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* @param aParent the parent of the new frame
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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_NewTableRowFrame(nsIFrame*& aResult);
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/** @see nsIFrame::Paint */
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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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/** ask all children to paint themselves, without clipping (for cells with rowspan>1)
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* @see nsIFrame::Paint
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*/
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virtual void PaintChildren(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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/** calls Reflow for all of its child cells.
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* Cells with rowspan=1 are all set to the same height and stacked horizontally.
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* <P> Cells are not split unless absolutely necessary.
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* <P> Cells are resized in nsTableFrame::BalanceColumnWidths
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* and nsTableFrame::ShrinkWrapChildren
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*
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* @param aDesiredSize width set to width of the sum of the cells, height set to
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* height of cells with rowspan=1.
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*
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* @see nsIFrame::Reflow
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* @see nsTableFrame::BalanceColumnWidths
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* @see nsTableFrame::ShrinkWrapChildren
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*/
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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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virtual void DidResize(nsIPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState);
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/**
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* Get the "type" of the frame
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*
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* @see nsLayoutAtoms::tableRowFrame
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*/
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NS_IMETHOD GetFrameType(nsIAtom** aType) const;
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NS_IMETHOD GetFrameName(nsString& aResult) const;
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/** set mTallestCell to 0 in anticipation of recalculating it */
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void ResetMaxChildHeight();
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/** set mTallestCell to max(mTallestCell, aChildHeight) */
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void SetMaxChildHeight(nscoord aChildHeight, nscoord aCellTopMargin, nscoord aCellBottomMargin);
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/** returns the tallest child in this row (ignoring any cell with rowspans) */
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nscoord GetTallestChild() const;
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nscoord GetChildMaxTopMargin() const;
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nscoord GetChildMaxBottomMargin() const;
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PRInt32 GetMaxColumns() const;
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/** returns the ordinal position of this row in its table */
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virtual PRInt32 GetRowIndex() const;
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/** set this row's starting row index */
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void SetRowIndex (int aRowIndex);
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virtual PRBool Contains(const nsPoint& aPoint);
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/** used by yje row group frame code */
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void ReflowCellFrame(nsIPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsTableCellFrame* aCellFrame,
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nscoord aAvailableHeight,
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nsReflowStatus& aStatus);
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void InsertCellFrame(nsTableCellFrame* aFrame, nsTableCellFrame* aPrevSibling);
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protected:
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/** protected constructor.
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* @see NewFrame
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*/
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nsTableRowFrame();
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/** implement abstract method on nsHTMLContainerFrame */
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virtual PRIntn GetSkipSides() const;
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/** Incremental Reflow attempts to do column balancing with the minimum number of reflow
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* commands to child elements. This is done by processing the reflow command,
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* rebalancing column widths (if necessary), then comparing the resulting column widths
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* to the prior column widths and reflowing only those cells that require a reflow.
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*
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* @see Reflow
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*/
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NS_IMETHOD IncrementalReflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD IR_TargetIsChild(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsIFrame * aNextFrame);
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NS_IMETHOD IR_TargetIsMe(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD IR_CellInserted(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsTableCellFrame * aInsertedFrame,
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PRBool aReplace);
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NS_IMETHOD IR_CellAppended(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsTableCellFrame * aAppendedFrame);
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NS_IMETHOD IR_DidAppendCell(nsTableCellFrame *aRowFrame);
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NS_IMETHOD IR_CellRemoved(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsTableCellFrame * aDeletedFrame);
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NS_IMETHOD IR_StyleChanged(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus);
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// row-specific methods
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void GetMinRowSpan(nsTableFrame *aTableFrame);
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void FixMinCellHeight(nsTableFrame *aTableFrame);
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NS_IMETHOD RecoverState(nsIPresContext& aPresContext,
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RowReflowState& aState,
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nsIFrame* aKidFrame,
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nscoord& aMaxCellTopMargin,
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nscoord& aMaxCellBottomMargin);
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void PlaceChild(nsIPresContext& aPresContext,
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RowReflowState& aState,
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nsIFrame* aKidFrame,
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const nsRect& aKidRect,
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nsSize* aMaxElementSize,
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nsSize* aKidMaxElementSize);
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nscoord ComputeCellXOffset(const RowReflowState& aState,
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nsIFrame* aKidFrame,
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const nsMargin& aKidMargin) const;
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nscoord ComputeCellAvailWidth(const RowReflowState& aState,
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nsIFrame* aKidFrame) const;
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/**
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* Called for a resize reflow. Typically because the column widths have
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* changed. Reflows all the existing table cell frames
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*/
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NS_IMETHOD ResizeReflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus);
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/**
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* Called for the initial reflow. Creates each table cell frame, and
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* reflows the cell frame to gets its minimum and maximum sizes
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*/
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NS_IMETHOD InitialReflow(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsTableCellFrame * aStartFrame,
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PRBool aDoSiblings);
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private:
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PRInt32 mRowIndex;
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nscoord mTallestCell; // not my height, but the height of my tallest child
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nscoord mCellMaxTopMargin;
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nscoord mCellMaxBottomMargin;
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PRInt32 mMinRowSpan; // the smallest row span among all my child cells
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PRBool mInitializedChildren; // PR_TRUE if child cells have been initialized
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// (for now, that means "added to the table", and
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// is NOT the same as having nsIFrame::Init() called.)
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};
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inline PRInt32 nsTableRowFrame::GetRowIndex() const
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{
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NS_ASSERTION(0<=mRowIndex, "bad state: row index");
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return (mRowIndex);
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}
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inline void nsTableRowFrame::SetRowIndex (int aRowIndex)
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{
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mRowIndex = aRowIndex;
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}
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inline void nsTableRowFrame::ResetInitChildren()
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{ mInitializedChildren=PR_FALSE; }
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#endif
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