зеркало из https://github.com/mozilla/gecko-dev.git
311 строки
12 KiB
C++
311 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 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 nsTableRowGroupFrame_h__
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#define nsTableRowGroupFrame_h__
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#include "nscore.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsIAtom.h"
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class nsTableFrame;
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class nsTableRowFrame;
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/* ----------- RowGroupReflowState ---------- */
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struct RowGroupReflowState {
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nsIPresContext& mPresContext; // Our pres context
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const nsHTMLReflowState& reflowState; // Our reflow state
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// The available size (computed from the parent)
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nsSize availSize;
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// Flags for whether the max size is unconstrained
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PRBool unconstrainedWidth;
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PRBool unconstrainedHeight;
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// Running y-offset
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nscoord y;
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// Flag used to set maxElementSize to my first row
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PRBool firstRow;
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// Remember the height of the first row, because it's our maxElementHeight (plus header/footers)
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nscoord firstRowHeight;
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nsTableFrame *tableFrame;
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RowGroupReflowState(nsIPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame * aTableFrame)
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: mPresContext(aPresContext),
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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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y=0; // border/padding???
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unconstrainedWidth = PRBool(reflowState.availableWidth == NS_UNCONSTRAINEDSIZE);
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unconstrainedHeight = PRBool(reflowState.availableHeight == NS_UNCONSTRAINEDSIZE);
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firstRow = PR_TRUE;
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firstRowHeight=0;
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tableFrame = aTableFrame;
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}
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~RowGroupReflowState() {
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}
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};
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#define NS_ITABLEROWGROUPFRAME_IID \
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{ 0xe940e7bc, 0xb534, 0x11d2, \
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{ 0x95, 0xa2, 0x0, 0x60, 0xb0, 0xc3, 0x44, 0x14 } }
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/**
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* nsTableRowGroupFrame is the frame that maps row groups
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* (HTML tags THEAD, TFOOT, and TBODY). This class cannot be reused
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* outside of an nsTableFrame. It assumes that its parent is an nsTableFrame, and
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* its children are nsTableRowFrames.
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*
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* @see nsTableFrame
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* @see nsTableRowFrame
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*/
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class nsTableRowGroupFrame : public nsHTMLContainerFrame
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{
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public:
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// default constructor supplied by the compiler
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/** instantiate a new instance of nsTableRowGroupFrame.
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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_NewTableRowGroupFrame(nsIFrame** aResult);
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NS_METHOD QueryInterface(const nsIID& aIID, void** aInstancePtr);
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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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/** @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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/**
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* Find the correct descendant frame.
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* Return PR_TRUE if a frame containing the point is found.
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* @see nsContainerFrame::GetFrameForPoint
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*/
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NS_IMETHOD GetFrameForPoint(const nsPoint& aPoint, nsIFrame** aFrame);
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/** calls Reflow for all of its child rows.
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* Rows are all set to the same width and stacked vertically.
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* <P> rows are not split unless absolutely necessary.
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*
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* @param aDesiredSize width set to width of rows, height set to
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* sum of height of rows that fit in aMaxSize.height.
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*
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* @see nsIFrame::Reflow
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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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/**
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* Get the "type" of the frame
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*
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* @see nsLayoutAtoms::tableRowGroupFrame
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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 aCount to the number of child rows (not necessarily == number of child frames) */
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NS_METHOD GetRowCount(PRInt32 &aCount, PRBool aDeepCount = PR_TRUE);
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/** return the table-relative row index of the first row in this rowgroup.
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* if there are no rows, -1 is returned.
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*/
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PRInt32 GetStartRowIndex();
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/** get the maximum number of columns taken up by any row in this rowgroup */
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NS_METHOD GetMaxColumns(PRInt32 &aMaxColumns);
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/**
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* Used for header and footer row group frames that are repeated when
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* splitting a table frame.
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*
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* Performs any table specific initialization
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*
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* @param aHeaderFooterFrame the original header or footer row group frame
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* that was repeated
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*/
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nsresult InitRepeatedFrame(nsTableRowGroupFrame* aHeaderFooterFrame);
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/**
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* Get the total height of all the row rects
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*/
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NS_METHOD GetHeightOfRows(nscoord& aResult);
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virtual PRBool RowGroupReceivesExcessSpace() { return PR_TRUE; }
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virtual PRBool ContinueReflow(nsIPresContext& aPresContext, nscoord y, nscoord height) { return PR_TRUE; }
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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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void PlaceChild(nsIPresContext& aPresContext,
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RowGroupReflowState& aReflowState,
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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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void CalculateRowHeights(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState);
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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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RowGroupReflowState& 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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RowGroupReflowState& 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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RowGroupReflowState& 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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RowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD DidAppendRow(nsTableRowFrame *aRowFrame);
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PRBool NoRowsFollow();
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nsresult AdjustSiblingsAfterReflow(nsIPresContext& aPresContext,
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RowGroupReflowState& aReflowState,
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nsIFrame* aKidFrame,
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nscoord aDeltaY);
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/**
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* Reflow the frames we've already created
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*
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* @param aPresContext presentation context to use
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* @param aReflowState current inline state
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* @return true if we successfully reflowed all the mapped children and false
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* otherwise, e.g. we pushed children to the next in flow
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*/
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NS_METHOD ReflowMappedChildren(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsTableRowFrame * aStartFrame,
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nsReflowReason aReason,
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PRBool aDoSiblings,
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PRBool aDirtyOnly = PR_FALSE);
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/**
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* Pull-up all the row frames from our next-in-flow
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*/
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NS_METHOD PullUpAllRowFrames(nsIPresContext& aPresContext);
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nsresult SplitRowGroup(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame* aTableFrame,
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nsReflowStatus& aStatus);
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NS_IMETHOD ReflowBeforeRowLayout(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsReflowReason aReason) { return NS_OK; };
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NS_IMETHOD ReflowAfterRowLayout(nsIPresContext& aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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RowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsReflowReason aReason) { return NS_OK; };
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nsresult AddTableDirtyReflowCommand(nsIPresContext& aPresContext,
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nsIPresShell& aPresShell,
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nsIFrame* aTableFrame);
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virtual nsIFrame* GetFirstFrameForReflow(nsIPresContext& aPresContext) { return mFrames.FirstChild(); };
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virtual void GetNextFrameForReflow(nsIPresContext& aPresContext, nsIFrame* aFrame, nsIFrame** aResult) { aFrame->GetNextSibling(aResult); };
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void GetNextRowSibling(nsIFrame** aRowFrame);
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public:
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virtual nsIFrame* GetFirstFrame() { return mFrames.FirstChild(); };
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virtual nsIFrame* GetLastFrame() { return mFrames.LastChild(); };
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virtual void GetNextFrame(nsIFrame* aFrame, nsIFrame** aResult) { aFrame->GetNextSibling(aResult); };
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virtual PRBool RowsDesireExcessSpace() { return PR_TRUE; };
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virtual PRBool RowGroupDesiresExcessSpace() { return PR_TRUE; };
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private:
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nsIAtom *mType;
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};
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#endif
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