зеркало из https://github.com/mozilla/gecko-dev.git
357 строки
12 KiB
C++
357 строки
12 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 nsTableCellFrame_h__
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#define nsTableCellFrame_h__
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#include "nsITableCellLayout.h"
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#include "nscore.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsTableRowFrame.h" // need to actually include this here to inline GetRowIndex
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#include "nsStyleContext.h"
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#include "nsIPercentHeightObserver.h"
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#include "nsGkAtoms.h"
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#include "nsLayoutUtils.h"
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#include "nsTArray.h"
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class nsTableFrame;
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/**
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* Additional frame-state bits
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*/
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#define NS_TABLE_CELL_CONTENT_EMPTY NS_FRAME_STATE_BIT(31)
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#define NS_TABLE_CELL_HAD_SPECIAL_REFLOW NS_FRAME_STATE_BIT(29)
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#define NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT NS_FRAME_STATE_BIT(28)
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/**
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* nsTableCellFrame
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* data structure to maintain information about a single table cell's frame
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*
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* NOTE: frames are not ref counted. We expose addref and release here
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* so we can change that decsion in the future. Users of nsITableCellLayout
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* should refcount correctly as if this object is being ref counted, though
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* no actual support is under the hood.
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*
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* @author sclark
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*/
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class nsTableCellFrame : public nsHTMLContainerFrame,
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public nsITableCellLayout,
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public nsIPercentHeightObserver
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{
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public:
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NS_DECL_QUERYFRAME_TARGET(nsTableCellFrame)
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS
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// default constructor supplied by the compiler
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nsTableCellFrame(nsStyleContext* aContext);
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~nsTableCellFrame();
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NS_IMETHOD Init(nsIContent* aContent,
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nsIFrame* aParent,
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nsIFrame* aPrevInFlow);
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#ifdef ACCESSIBILITY
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virtual already_AddRefed<nsAccessible> CreateAccessible();
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#endif
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NS_IMETHOD AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType);
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/** @see nsIFrame::DidSetStyleContext */
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virtual void DidSetStyleContext(nsStyleContext* aOldStyleContext);
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// table cells contain a block frame which does most of the work, and
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// so these functions should never be called. They assert and return
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// NS_ERROR_NOT_IMPLEMENTED
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NS_IMETHOD AppendFrames(nsIAtom* aListName,
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nsFrameList& aFrameList);
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NS_IMETHOD InsertFrames(nsIAtom* aListName,
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nsIFrame* aPrevFrame,
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nsFrameList& aFrameList);
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NS_IMETHOD RemoveFrame(nsIAtom* aListName,
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nsIFrame* aOldFrame);
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virtual nsIFrame* GetContentInsertionFrame() {
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return GetFirstChild(nsnull)->GetContentInsertionFrame();
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}
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virtual nsMargin GetUsedMargin() const;
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virtual void NotifyPercentHeight(const nsHTMLReflowState& aReflowState);
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virtual PRBool NeedsToObserve(const nsHTMLReflowState& aReflowState);
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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_NewTableCellFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);
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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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void PaintCellBackground(nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect, nsPoint aPt,
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PRUint32 aFlags);
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virtual nscoord GetMinWidth(nsRenderingContext *aRenderingContext);
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virtual nscoord GetPrefWidth(nsRenderingContext *aRenderingContext);
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virtual IntrinsicWidthOffsetData
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IntrinsicWidthOffsets(nsRenderingContext* aRenderingContext);
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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::tableCellFrame
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*/
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virtual nsIAtom* GetType() const;
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virtual PRBool IsContainingBlock() const;
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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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void VerticallyAlignChild(nscoord aMaxAscent);
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/*
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* Get the value of vertical-align adjusted for CSS 2's rules for a
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* table cell, which means the result is always
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* NS_STYLE_VERTICAL_ALIGN_{TOP,MIDDLE,BOTTOM,BASELINE}.
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*/
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PRUint8 GetVerticalAlign() const;
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PRBool HasVerticalAlignBaseline() const {
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return GetVerticalAlign() == NS_STYLE_VERTICAL_ALIGN_BASELINE;
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}
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PRBool CellHasVisibleContent(nscoord height,
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nsTableFrame* tableFrame,
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nsIFrame* kidFrame);
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/**
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* Get the first-line baseline of the cell relative to its top border
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* edge, as if the cell were vertically aligned to the top of the row.
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*/
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nscoord GetCellBaseline() const;
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/**
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* return the cell's specified row span. this is what was specified in the
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* content model or in the style info, and is always >= 1.
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* to get the effective row span (the actual value that applies), use GetEffectiveRowSpan()
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* @see nsTableFrame::GetEffectiveRowSpan()
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*/
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virtual PRInt32 GetRowSpan();
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// there is no set row index because row index depends on the cell's parent row only
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/*---------------- nsITableCellLayout methods ------------------------*/
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/**
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* return the cell's starting row index (starting at 0 for the first row).
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* for continued cell frames the row index is that of the cell's first-in-flow
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* and the column index (starting at 0 for the first column
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*/
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NS_IMETHOD GetCellIndexes(PRInt32 &aRowIndex, PRInt32 &aColIndex);
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/** return the mapped cell's row index (starting at 0 for the first row) */
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virtual nsresult GetRowIndex(PRInt32 &aRowIndex) const;
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/**
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* return the cell's specified col span. this is what was specified in the
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* content model or in the style info, and is always >= 1.
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* to get the effective col span (the actual value that applies), use GetEffectiveColSpan()
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* @see nsTableFrame::GetEffectiveColSpan()
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*/
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virtual PRInt32 GetColSpan();
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/** return the cell's column index (starting at 0 for the first column) */
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virtual nsresult GetColIndex(PRInt32 &aColIndex) const;
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void SetColIndex(PRInt32 aColIndex);
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/** return the available width given to this frame during its last reflow */
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inline nscoord GetPriorAvailWidth();
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/** set the available width given to this frame during its last reflow */
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inline void SetPriorAvailWidth(nscoord aPriorAvailWidth);
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/** return the desired size returned by this frame during its last reflow */
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inline nsSize GetDesiredSize();
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/** set the desired size returned by this frame during its last reflow */
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inline void SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize);
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PRBool GetContentEmpty();
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void SetContentEmpty(PRBool aContentEmpty);
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PRBool HasPctOverHeight();
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void SetHasPctOverHeight(PRBool aValue);
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nsTableCellFrame* GetNextCell() const;
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virtual nsMargin* GetBorderWidth(nsMargin& aBorder) const;
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virtual void PaintBackground(nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsPoint aPt,
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PRUint32 aFlags);
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void DecorateForSelection(nsRenderingContext& aRenderingContext,
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nsPoint aPt);
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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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/**
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* GetBorderOverflow says how far the cell's own borders extend
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* outside its own bounds. In the separated borders model this should
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* just be zero (as it is for most frames), but in the collapsed
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* borders model (for which nsBCTableCellFrame overrides this virtual
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* method), it considers the extents of the collapsed border.
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*/
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virtual nsMargin GetBorderOverflow();
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friend class nsTableRowFrame;
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PRUint32 mColIndex; // the starting column for this cell
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nscoord mPriorAvailWidth; // the avail width during the last reflow
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nsSize mDesiredSize; // the last desired width & height
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};
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inline nscoord nsTableCellFrame::GetPriorAvailWidth()
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{ return mPriorAvailWidth;}
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inline void nsTableCellFrame::SetPriorAvailWidth(nscoord aPriorAvailWidth)
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{ mPriorAvailWidth = aPriorAvailWidth;}
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inline nsSize nsTableCellFrame::GetDesiredSize()
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{ return mDesiredSize; }
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inline void nsTableCellFrame::SetDesiredSize(const nsHTMLReflowMetrics & aDesiredSize)
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{
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mDesiredSize.width = aDesiredSize.width;
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mDesiredSize.height = aDesiredSize.height;
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}
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inline PRBool nsTableCellFrame::GetContentEmpty()
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{
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return (mState & NS_TABLE_CELL_CONTENT_EMPTY) ==
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NS_TABLE_CELL_CONTENT_EMPTY;
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}
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inline void nsTableCellFrame::SetContentEmpty(PRBool aContentEmpty)
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{
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if (aContentEmpty) {
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mState |= NS_TABLE_CELL_CONTENT_EMPTY;
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} else {
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mState &= ~NS_TABLE_CELL_CONTENT_EMPTY;
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}
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}
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inline PRBool nsTableCellFrame::HasPctOverHeight()
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{
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return (mState & NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT) ==
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NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT;
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}
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inline void nsTableCellFrame::SetHasPctOverHeight(PRBool aValue)
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{
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if (aValue) {
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mState |= NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT;
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} else {
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mState &= ~NS_TABLE_CELL_HAS_PCT_OVER_HEIGHT;
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}
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}
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// nsBCTableCellFrame
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class nsBCTableCellFrame : public nsTableCellFrame
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{
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public:
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NS_DECL_FRAMEARENA_HELPERS
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nsBCTableCellFrame(nsStyleContext* aContext);
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~nsBCTableCellFrame();
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virtual nsIAtom* GetType() const;
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virtual nsMargin GetUsedBorder() const;
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virtual PRBool GetBorderRadii(nscoord aRadii[8]) const;
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// Get the *inner half of the border only*, in twips.
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virtual nsMargin* GetBorderWidth(nsMargin& aBorder) const;
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// Get the *inner half of the border only*, in pixels.
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BCPixelSize GetBorderWidth(mozilla::css::Side aSide) const;
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// Set the full (both halves) width of the border
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void SetBorderWidth(mozilla::css::Side aSide, BCPixelSize aPixelValue);
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virtual nsMargin GetBorderOverflow();
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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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virtual void PaintBackground(nsRenderingContext& aRenderingContext,
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const nsRect& aDirtyRect,
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nsPoint aPt,
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PRUint32 aFlags);
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private:
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// These are the entire width of the border (the cell edge contains only
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// the inner half, per the macros in nsTablePainter.h).
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BCPixelSize mTopBorder;
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BCPixelSize mRightBorder;
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BCPixelSize mBottomBorder;
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BCPixelSize mLeftBorder;
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};
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#endif
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