зеркало из https://github.com/mozilla/gecko-dev.git
485 строки
19 KiB
C++
485 строки
19 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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#include "nsTArray.h"
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class nsTableFrame;
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class nsTableRowFrame;
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class nsTableCellFrame;
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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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// 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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y = 0;
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}
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~nsRowGroupReflowState() {}
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};
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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 NS_FRAME_STATE_BIT(31)
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#define NS_ROWGROUP_HAS_STYLE_HEIGHT NS_FRAME_STATE_BIT(30)
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// the next is also used on rows (see nsTableRowGroupFrame::InitRepeatedFrame)
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#define NS_REPEATED_ROW_OR_ROWGROUP NS_FRAME_STATE_BIT(28)
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#define NS_ROWGROUP_HAS_ROW_CURSOR NS_FRAME_STATE_BIT(27)
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#define MIN_ROWS_NEEDING_CURSOR 20
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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
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: public nsHTMLContainerFrame
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, public nsILineIterator
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{
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public:
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NS_DECL_QUERYFRAME_TARGET(nsTableRowGroupFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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/** instantiate a new instance of nsTableRowFrame.
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* @param aPresShell the pres shell for this frame
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*
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* @return the frame that was created
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*/
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friend nsIFrame* NS_NewTableRowGroupFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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virtual ~nsTableRowGroupFrame();
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/** @see nsIFrame::DidSetStyleContext */
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
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NS_IMETHOD AppendFrames(ChildListID aListID,
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nsFrameList& aFrameList);
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NS_IMETHOD InsertFrames(ChildListID aListID,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList);
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NS_IMETHOD RemoveFrame(ChildListID aListID,
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nsIFrame* aOldFrame);
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virtual nsMargin GetUsedMargin() const;
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virtual nsMargin GetUsedBorder() const;
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virtual nsMargin GetUsedPadding() const;
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NS_IMETHOD BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsRect& aDirtyRect,
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const nsDisplayListSet& aLists);
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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 nsGkAtoms::tableRowGroupFrame
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*/
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virtual nsIAtom* GetType() 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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/** Adjust the row indices of all rows whose index is >= aRowIndex.
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* @param aRowIndex - start adjusting with this index
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* @param aAdjustment - shift the row index by this amount
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*/
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void AdjustRowIndices(PRInt32 aRowIndex,
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PRInt32 anAdjustment);
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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 GetHeightBasis(const nsHTMLReflowState& aReflowState);
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nsMargin* GetBCBorderWidth(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(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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/**
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* Adjust to the effect of visibibility:collapse on the row group and
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* its children
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* @return additional shift upward that should be applied to
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* subsequent rowgroups due to rows and this rowgroup
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* being collapsed
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* @param aYTotalOffset the total amount that the rowgroup is shifted up
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* @param aWidth new width of the rowgroup
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*/
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nscoord CollapseRowGroupIfNecessary(nscoord aYTotalOffset,
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nscoord aWidth);
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// nsILineIterator methods
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public:
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virtual void DisposeLineIterator() { }
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// The table row is the equivalent to a line in block layout.
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// The nsILineIterator assumes that a line resides in a block, this role is
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// fullfilled by the row group. Rows in table are counted relative to the
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// table. The row index of row corresponds to the cellmap coordinates. The
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// line index with respect to a row group can be computed by substracting the
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// row index of the first row in the row group.
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/** Get the number of rows in a row group
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* @return the number of lines in a row group
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*/
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virtual PRInt32 GetNumLines();
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/** @see nsILineIterator.h GetDirection
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* @return true if the table is rtl
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*/
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virtual bool GetDirection();
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/** Return structural information about a line.
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* @param aLineNumber - the index of the row relative to the row group
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* If the line-number is invalid then
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* aFirstFrameOnLine will be nsnull and
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* aNumFramesOnLine will be zero.
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* @param aFirstFrameOnLine - the first cell frame that originates in row
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* with a rowindex that matches a line number
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* @param aNumFramesOnLine - return the numbers of cells originating in
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* this row
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* @param aLineBounds - rect of the row
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* @param aLineFlags - unused set to 0
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*/
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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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/** Given a frame that's a child of the rowgroup, find which line its on.
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* @param aFrame - frame, should be a row
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* @param aStartLine - minimal index to return
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* @return row index relative to the row group if this a row
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* frame and the index is at least aStartLine.
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* -1 if the frame cannot be found.
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*/
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virtual PRInt32 FindLineContaining(nsIFrame* aFrame, PRInt32 aStartLine = 0);
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/** Find the orginating cell frame on a row that is the nearest to the
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* coordinate X.
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* @param aLineNumber - the index of the row relative to the row group
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* @param aX - X coordinate in twips relative to the
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* origin of the row group
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* @param aFrameFound - pointer to the cellframe
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* @param aXIsBeforeFirstFrame - the point is before the first originating
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* cellframe
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* @param aXIsAfterLastFrame - the point is after the last originating
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* cellframe
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*/
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NS_IMETHOD FindFrameAt(PRInt32 aLineNumber,
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nscoord aX,
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nsIFrame** aFrameFound,
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bool* aXIsBeforeFirstFrame,
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bool* aXIsAfterLastFrame);
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#ifdef IBMBIDI
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/** Check whether visual and logical order of cell frames within a line are
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* identical. As the layout will reorder them this is always the case
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* @param aLine - the index of the row relative to the table
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* @param aIsReordered - returns false
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* @param aFirstVisual - if the table is rtl first originating cell frame
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* @param aLastVisual - if the table is rtl last originating cell frame
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*/
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NS_IMETHOD CheckLineOrder(PRInt32 aLine,
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bool *aIsReordered,
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nsIFrame **aFirstVisual,
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nsIFrame **aLastVisual);
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#endif
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/** Find the next originating cell frame that originates in the row.
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* @param aFrame - cell frame to start with, will return the next cell
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* originating in a row
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* @param aLineNumber - the index of the row relative to the table
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*/
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NS_IMETHOD GetNextSiblingOnLine(nsIFrame*& aFrame, PRInt32 aLineNumber);
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// row cursor methods to speed up searching for the row(s)
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// containing a point. The basic idea is that we set the cursor
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// property if the rows' y and yMosts are non-decreasing (considering only
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// rows with nonempty overflowAreas --- empty overflowAreas never participate
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// in event handling or painting), and the rowgroup has sufficient number of
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// rows. The cursor property points to a "recently used" row. If we get a
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// series of requests that work on rows "near" the cursor, then we can find
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// those nearby rows quickly by starting our search at the cursor.
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// This code is based on the line cursor code in nsBlockFrame. It's more general
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// though, and could be extracted and used elsewhere.
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struct FrameCursorData {
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nsTArray<nsIFrame*> mFrames;
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PRUint32 mCursorIndex;
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nscoord mOverflowAbove;
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nscoord mOverflowBelow;
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FrameCursorData()
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: mFrames(MIN_ROWS_NEEDING_CURSOR), mCursorIndex(0), mOverflowAbove(0),
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mOverflowBelow(0) {}
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bool AppendFrame(nsIFrame* aFrame);
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void FinishBuildingCursor() {
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mFrames.Compact();
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}
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};
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// Clear out row cursor because we're disturbing the rows (e.g., Reflow)
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void ClearRowCursor();
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/**
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* Get the first row that might contain y-coord 'aY', or nsnull if you must search
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* all rows.
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* The actual row returned might not contain 'aY', but if not, it is guaranteed
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* to be before any row which does contain 'aY'.
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* aOverflowAbove is the maximum over all rows of -row.GetOverflowRect().y.
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* To find all rows that intersect the vertical interval aY/aYMost, call
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* GetFirstRowContaining(aY, &overflowAbove), and then iterate through all
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* rows until reaching a row where row->GetRect().y - overflowAbove >= aYMost.
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* That row and all subsequent rows cannot intersect the interval.
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*/
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nsIFrame* GetFirstRowContaining(nscoord aY, nscoord* aOverflowAbove);
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/**
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* Set up the row cursor. After this, call AppendFrame for every
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* child frame in sibling order. Ensure that the child frame y and YMost values
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* form non-decreasing sequences (should always be true for table rows);
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* if this is violated, call ClearRowCursor(). If we return nsnull, then we
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* decided not to use a cursor or we already have one set up.
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*/
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FrameCursorData* SetupRowCursor();
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virtual nsILineIterator* GetLineIterator() { return this; }
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protected:
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nsTableRowGroupFrame(nsStyleContext* aContext);
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void InitChildReflowState(nsPresContext& aPresContext,
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bool aBorderCollapse,
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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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const nsRect& aOriginalKidRect,
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const nsRect& aOriginalKidVisualOverflow);
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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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void DidResizeRows(nsHTMLReflowMetrics& aDesiredSize);
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void SlideChild(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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nsresult 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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bool* 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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bool aFirstRowIsTopOfPage,
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nscoord aSpanningRowBottom,
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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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bool 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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bool IsRepeatable() const;
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void SetRepeatable(bool aRepeatable);
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bool HasStyleHeight() const;
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void SetHasStyleHeight(bool aValue);
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bool HasInternalBreakBefore() const;
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bool HasInternalBreakAfter() const;
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};
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inline bool 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(bool 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 bool 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(bool 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(nsMargin& aBorder)
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{
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PRInt32 aPixelsToTwips = nsPresContext::AppUnitsPerCSSPixel();
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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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