зеркало из https://github.com/mozilla/gecko-dev.git
320 строки
12 KiB
C++
320 строки
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 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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/* ----------- RowReflowState ---------- */
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struct RowReflowState {
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// Our reflow state
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const nsHTMLReflowState& reflowState;
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// The body's available size (computed from the body's parent)
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nsSize availSize;
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// the running x-offset
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nscoord x;
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// Height of tallest cell (excluding cells with rowspan > 1)
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nscoord maxCellHeight; // just the height of the cell frame
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nscoord maxCellVertSpace; // the maximum MAX(cellheight + topMargin + bottomMargin)
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nsTableFrame *tableFrame;
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RowReflowState(const nsHTMLReflowState& aReflowState,
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nsTableFrame* aTableFrame)
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: reflowState(aReflowState)
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{
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availSize.width = reflowState.availableWidth;
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availSize.height = reflowState.availableHeight;
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maxCellHeight = 0;
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maxCellVertSpace = 0;
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tableFrame = aTableFrame;
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x=0;
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}
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};
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/**
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* Additional frame-state bits
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*/
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#define NS_TABLE_MAX_ROW_INDEX (1<<19)
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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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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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/** 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(nsIPresShell* aPresShell, 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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#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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/** 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);
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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 GetTopMargin() const;
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nscoord GetBottomMargin() 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(nsIPresContext* aPresContext, const nsPoint& aPoint);
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void GetMaxElementSize(nsSize& aMaxElementSize) const;
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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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nsresult CalculateCellActualSize(nsIFrame* aRowFrame,
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nscoord& aDesiredWidth,
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nscoord& aDesiredHeight,
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nscoord aAvailWidth);
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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_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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nsresult AddTableDirtyReflowCommand(nsIPresContext* aPresContext,
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nsIPresShell& aPresShell,
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nsIFrame* aTableFrame);
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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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nsSize* aMaxElementSize);
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void PlaceChild(nsIPresContext* aPresContext,
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RowReflowState& aState,
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nsIFrame* aKidFrame,
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nsHTMLReflowMetrics& aDesiredSize,
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nscoord aX,
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nscoord aY,
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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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PRBool aDirtyOnly = PR_FALSE);
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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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nscoord CalculateCellAvailableWidth(nsTableFrame* aTableFrame,
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nsIFrame* aCellFrame,
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PRInt32 aCellColIndex,
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PRInt32 aNumColSpans,
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nscoord aCellSpacingX);
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public:
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struct RowBits {
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int mRowIndex:20;
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unsigned mMinRowSpan:12; // the smallest row span among all my child cells
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};
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private:
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union {
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PRUint32 mAllBits;
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RowBits mBits;
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};
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nscoord mTallestCell; // not my height, but the height of my tallest child
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nsSize mMaxElementSize; // cached max element size
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};
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inline PRInt32 nsTableRowFrame::GetRowIndex() const
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{
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return PRInt32(mBits.mRowIndex);
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}
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inline void nsTableRowFrame::SetRowIndex (int aRowIndex)
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{
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NS_PRECONDITION(aRowIndex < NS_TABLE_MAX_ROW_INDEX, "unexpected row index");
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mBits.mRowIndex = aRowIndex;
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}
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inline void nsTableRowFrame::GetMaxElementSize(nsSize& aMaxElementSize) const
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{
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aMaxElementSize.width = mMaxElementSize.width;
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aMaxElementSize.height = mMaxElementSize.height;
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}
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#endif
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