зеркало из https://github.com/mozilla/gecko-dev.git
450 строки
17 KiB
C++
450 строки
17 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* 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
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either of the GNU General Public License Version 2 or later (the "GPL"),
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* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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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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#include "nsILineIterator.h"
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#include "nsTablePainter.h"
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class nsTableFrame;
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class nsTableRowFrame;
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class nsTableCellFrame;
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#ifdef DEBUG_TABLE_REFLOW_TIMING
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class nsReflowTimer;
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#endif
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struct nsRowGroupReflowState {
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const nsHTMLReflowState& reflowState; // Our reflow state
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nsTableFrame* tableFrame;
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nsReflowReason reason;
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// The available size (computed from the parent)
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nsSize availSize;
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// Running y-offset
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nscoord y;
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nsRowGroupReflowState(const nsHTMLReflowState& aReflowState,
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nsTableFrame* aTableFrame)
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:reflowState(aReflowState), tableFrame(aTableFrame)
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{
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availSize.width = reflowState.availableWidth;
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availSize.height = reflowState.availableHeight;
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reason = reflowState.reason;
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y = 0;
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}
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~nsRowGroupReflowState() {}
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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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// use the following bits from nsFrame's frame state
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// thead or tfoot should be repeated on every printed page
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#define NS_ROWGROUP_REPEATABLE 0x80000000
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#define NS_ROWGROUP_HAS_STYLE_HEIGHT 0x40000000
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// we need a 3rd pass reflow to deal with pct height nested tables
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#define NS_ROWGROUP_NEED_SPECIAL_REFLOW 0x20000000
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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, public nsILineIteratorNavigator
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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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/** 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(nsIPresShell* aPresShell, nsIFrame** aResult);
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virtual ~nsTableRowGroupFrame();
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NS_IMETHOD Init(nsPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsStyleContext* aContext,
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nsIFrame* aPrevInFlow);
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NS_IMETHOD AppendFrames(nsPresContext* 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(nsPresContext* 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(nsPresContext* 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(nsPresContext* aPresContext,
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nsIRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsFramePaintLayer aWhichLayer,
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PRUint32 aFlags = 0);
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// row groups don't paint their own background -- the cells do
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virtual PRBool CanPaintBackground() { return PR_FALSE; }
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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, nsFramePaintLayer aWhichLayer, 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(nsPresContext* 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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virtual nsIAtom* GetType() const;
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virtual PRBool IsContainingBlock() const;
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nsTableRowFrame* GetFirstRow();
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#ifdef DEBUG
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NS_IMETHOD GetFrameName(nsAString& aResult) const;
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#endif
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/** return the number of child rows (not necessarily == number of child frames) */
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PRInt32 GetRowCount();
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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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/**
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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(nsPresContext* aPresContext,
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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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nscoord GetHeightOfRows();
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nscoord GetHeightBasis(const nsHTMLReflowState& aReflowState);
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nsMargin* GetBCBorderWidth(float aPixelsToTwips,
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nsMargin& aBorder);
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/**
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* Gets inner border widths before collapsing with cell borders
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* Caller must get top border from previous row group or from table
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* GetContinuousBCBorderWidth will not overwrite aBorder.top
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* see nsTablePainter about continuous borders
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*/
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void GetContinuousBCBorderWidth(float aPixelsToTwips,
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nsMargin& aBorder);
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/**
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* Sets full border widths before collapsing with cell borders
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* @param aForSide - side to set; only right, left, and bottom valid
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*/
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void SetContinuousBCBorderWidth(PRUint8 aForSide,
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BCPixelSize aPixelValue);
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// nsILineIterator methods
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public:
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NS_IMETHOD GetNumLines(PRInt32* aResult);
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NS_IMETHOD GetDirection(PRBool* aIsRightToLeft);
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NS_IMETHOD GetLine(PRInt32 aLineNumber,
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nsIFrame** aFirstFrameOnLine,
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PRInt32* aNumFramesOnLine,
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nsRect& aLineBounds,
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PRUint32* aLineFlags);
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NS_IMETHOD FindLineContaining(nsIFrame* aFrame, PRInt32* aLineNumberResult);
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NS_IMETHOD FindLineAt(nscoord aY, PRInt32* aLineNumberResult);
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NS_IMETHOD FindFrameAt(PRInt32 aLineNumber,
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nscoord aX,
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#ifdef IBMBIDI
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PRBool aCouldBeReordered,
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#endif
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nsIFrame** aFrameFound,
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PRBool* aXIsBeforeFirstFrame,
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PRBool* aXIsAfterLastFrame);
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#ifdef IBMBIDI
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NS_IMETHOD CheckLineOrder(PRInt32 aLine,
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PRBool *aIsReordered,
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nsIFrame **aFirstVisual,
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nsIFrame **aLastVisual);
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#endif
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NS_IMETHOD GetNextSiblingOnLine(nsIFrame*& aFrame, PRInt32 aLineNumber);
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protected:
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nsTableRowGroupFrame();
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void InitChildReflowState(nsPresContext& aPresContext,
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PRBool aBorderCollapse,
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float aPixelsToTwips,
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nsHTMLReflowState& aReflowState);
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/** implement abstract method on nsHTMLContainerFrame */
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virtual PRIntn GetSkipSides() const;
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void PlaceChild(nsPresContext* aPresContext,
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nsRowGroupReflowState& aReflowState,
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nsIFrame* aKidFrame,
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nsHTMLReflowMetrics& aDesiredSize);
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void CalculateRowHeights(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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const nsHTMLReflowState& aReflowState,
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nsTableRowFrame* aStartRowFrameIn = nsnull);
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void DidResizeRows(nsPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsHTMLReflowMetrics& aDesiredSize,
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nsTableRowFrame* aStartRowFrameIn = nsnull);
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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(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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nsRowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD IR_TargetIsChild(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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nsRowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsIFrame* aNextFrame);
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NS_IMETHOD IR_TargetIsMe(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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nsRowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus);
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NS_IMETHOD IR_StyleChanged(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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nsRowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus);
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nsresult AdjustSiblingsAfterReflow(nsRowGroupReflowState& aReflowState,
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nsIFrame* aKidFrame,
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nscoord aDeltaY);
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nsresult RecoverState(nsRowGroupReflowState& aReflowState,
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nsIFrame* aKidFrame);
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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 ReflowChildren(nsPresContext* aPresContext,
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nsHTMLReflowMetrics& aDesiredSize,
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nsRowGroupReflowState& aReflowState,
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nsReflowStatus& aStatus,
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nsTableRowFrame* aStartFrame,
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PRBool aDirtyOnly,
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nsTableRowFrame** aFirstRowReflowed = nsnull,
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PRBool* aPageBreakBeforeEnd = nsnull);
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nsresult SplitRowGroup(nsPresContext* 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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void SplitSpanningCells(nsPresContext& aPresContext,
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const nsHTMLReflowState& aReflowState,
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nsTableFrame& aTableFrame,
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nsTableRowFrame& aFirstRow,
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nsTableRowFrame& aLastRow,
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PRBool aFirstRowIsTopOfPage,
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nscoord aAvailHeight,
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nsTableRowFrame*& aContRowFrame,
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nsTableRowFrame*& aFirstTruncatedRow,
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nscoord& aDesiredHeight);
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void CreateContinuingRowFrame(nsPresContext& aPresContext,
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nsIFrame& aRowFrame,
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nsIFrame** aContRowFrame);
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PRBool IsSimpleRowFrame(nsTableFrame* aTableFrame,
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nsIFrame* aFrame);
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void GetNextRowSibling(nsIFrame** aRowFrame);
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void UndoContinuedRow(nsPresContext* aPresContext,
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nsTableRowFrame* aRow);
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private:
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// border widths in pixels in the collapsing border model
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BCPixelSize mRightContBorderWidth;
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BCPixelSize mBottomContBorderWidth;
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BCPixelSize mLeftContBorderWidth;
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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,
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nsIFrame** aResult) { *aResult = aFrame->GetNextSibling(); };
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PRBool IsRepeatable() const;
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void SetRepeatable(PRBool aRepeatable);
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PRBool HasStyleHeight() const;
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void SetHasStyleHeight(PRBool aValue);
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PRBool NeedSpecialReflow() const;
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void SetNeedSpecialReflow(PRBool aValue);
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#ifdef DEBUG_TABLE_REFLOW_TIMING
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public:
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nsReflowTimer* mTimer;
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#endif
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};
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inline PRBool nsTableRowGroupFrame::IsRepeatable() const
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{
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return (mState & NS_ROWGROUP_REPEATABLE) == NS_ROWGROUP_REPEATABLE;
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}
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inline void nsTableRowGroupFrame::SetRepeatable(PRBool aRepeatable)
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{
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if (aRepeatable) {
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mState |= NS_ROWGROUP_REPEATABLE;
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} else {
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mState &= ~NS_ROWGROUP_REPEATABLE;
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}
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}
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inline PRBool nsTableRowGroupFrame::NeedSpecialReflow() const
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{
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return (mState & NS_ROWGROUP_NEED_SPECIAL_REFLOW) == NS_ROWGROUP_NEED_SPECIAL_REFLOW;
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}
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inline void nsTableRowGroupFrame::SetNeedSpecialReflow(PRBool aValue)
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{
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if (aValue) {
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mState |= NS_ROWGROUP_NEED_SPECIAL_REFLOW;
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} else {
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mState &= ~NS_ROWGROUP_NEED_SPECIAL_REFLOW;
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}
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}
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inline PRBool nsTableRowGroupFrame::HasStyleHeight() const
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{
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return (mState & NS_ROWGROUP_HAS_STYLE_HEIGHT) == NS_ROWGROUP_HAS_STYLE_HEIGHT;
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}
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inline void nsTableRowGroupFrame::SetHasStyleHeight(PRBool aValue)
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{
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if (aValue) {
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mState |= NS_ROWGROUP_HAS_STYLE_HEIGHT;
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} else {
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mState &= ~NS_ROWGROUP_HAS_STYLE_HEIGHT;
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}
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}
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inline void
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nsTableRowGroupFrame::GetContinuousBCBorderWidth(float aPixelsToTwips,
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nsMargin& aBorder)
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{
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aBorder.right = BC_BORDER_LEFT_HALF_COORD(aPixelsToTwips,
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mRightContBorderWidth);
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aBorder.bottom = BC_BORDER_TOP_HALF_COORD(aPixelsToTwips,
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mBottomContBorderWidth);
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aBorder.left = BC_BORDER_RIGHT_HALF_COORD(aPixelsToTwips,
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mLeftContBorderWidth);
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return;
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}
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#endif
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