зеркало из https://github.com/mozilla/gecko-dev.git
335 строки
13 KiB
C++
335 строки
13 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 nsTableColGroupFrame_h__
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#define nsTableColGroupFrame_h__
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#include "nscore.h"
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#include "nsHTMLContainerFrame.h"
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#include "nsTableColFrame.h"
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#include "nsTablePainter.h"
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class nsTableColFrame;
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enum nsTableColGroupType {
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eColGroupContent = 0, // there is real col group content associated
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eColGroupAnonymousCol = 1, // the result of a col
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eColGroupAnonymousCell = 2 // the result of a cell alone
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};
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/**
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* nsTableColGroupFrame
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* data structure to maintain information about a single table cell's frame
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*
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* @author sclark
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*/
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class nsTableColGroupFrame : public nsHTMLContainerFrame
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{
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public:
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// default constructor supplied by the compiler
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/** instantiate a new instance of nsTableColGroupFrame.
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* @param aResult the new object is returned in this out-param
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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_NewTableColGroupFrame(nsIPresShell* aPresShell, nsIFrame** aResult);
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/** sets defaults for the colgroup.
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* @see nsIFrame::Init
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*/
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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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/** Initialize the colgroup frame with a set of children.
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* @see nsIFrame::SetInitialChildList
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*/
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NS_IMETHOD SetInitialChildList(nsPresContext* aPresContext,
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nsIAtom* aListName,
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nsIFrame* aChildList);
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/** A colgroup can be caused by three things:
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* 1) An element with table-column-group display
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* 2) An element with a table-column display without a
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* table-column-group parent
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* 3) Cells that are not in a column (and hence get an anonymous
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* column and colgroup).
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* @return colgroup type
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*/
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nsTableColGroupType GetColType() const;
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/** Set the colgroup type based on the creation cause
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* @param aType - the reason why this colgroup is needed
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*/
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void SetColType(nsTableColGroupType aType);
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/** Real in this context are colgroups that come from an element
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* with table-column-group display or wrap around columns that
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* come from an element with table-column display. Colgroups
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* that are the result of wrapping cells in an anonymous
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* column and colgroup are not considered real here.
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* @param aTableFrame - the table parent of the colgroups
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* @param aLastColgroup - the last real colgroup
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* @return is false if there is a non real colgroup at the end
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*/
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static PRBool GetLastRealColGroup(nsTableFrame* aTableFrame,
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nsIFrame** aLastColGroup);
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/** @see nsIFrame::AppendFrames, InsertFrames, RemoveFrame
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*/
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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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/** remove the column aChild from the column group, if requested renumber
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* the subsequent columns in this column group and all following column
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* groups. see also ResetColIndices for this
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* @param aPresContext - the presentation context
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* @param aChild - the column frame that needs to be removed
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* @param aResetSubsequentColIndices - if true the columns that follow
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* after aChild will be reenumerated
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*/
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void RemoveChild(nsPresContext& aPresContext,
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nsTableColFrame& aChild,
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PRBool aResetSubsequentColIndices);
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/** @see nsIFrame::Paint
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* all the table painting is done in nsTablePainter.cpp
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*/
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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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// column groups don't paint their own background -- the cells do
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virtual PRBool CanPaintBackground() { return PR_FALSE; }
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/** @see nsIFrame::GetFrameForPoint
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*/
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NS_IMETHOD GetFrameForPoint(nsPresContext* aPresContext,
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const nsPoint& aPoint,
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nsFramePaintLayer aWhichLayer,
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nsIFrame** aFrame);
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/** reflow of a column group is a trivial matter of reflowing
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* the col group's children (columns), and setting this frame
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* to 0-size. Since tables are row-centric, column group frames
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* don't play directly in the rendering game. They do however
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* maintain important state that effects table and cell layout.
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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::tableColGroupFrame
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*/
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virtual nsIAtom* GetType() const;
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/** Add column frames to the table storages: colframe cache and cellmap
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* this doesn't change the mFrames of the colgroup frame.
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* @param aPresContext - the presentation context
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* @param aFirstColIndex - the index at which aFirstFrame should be inserted
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* into the colframe cache.
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* @param aResetSubsequentColIndices - the indices of the col frames
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* after the insertion might need
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* an update
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* @param aFirstFrame - first frame that needs to be added to the table,
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* the frame should have a correctly set sibling
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* @param aLastFrame - last frame that needs to be added. It can be either
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* null or should be in the sibling chain of
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* aFirstFrame
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* @result - if there is no table frame or the table frame is not
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* the first in flow it will return an error
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*/
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nsresult AddColsToTable(nsPresContext& aPresContext,
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PRInt32 aFirstColIndex,
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PRBool aResetSubsequentColIndices,
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nsIFrame* aFirstFrame,
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nsIFrame* aLastFrame = nsnull);
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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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/** returns the number of columns represented by this group.
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* if there are col children, count them (taking into account the span of each)
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* else, check my own span attribute.
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*/
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virtual PRInt32 GetColCount() const;
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/** first column on the child list */
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nsTableColFrame * GetFirstColumn();
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/** next sibling to aChildFrame that is a column frame, first column frame
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* in the column group if aChildFrame is null
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*/
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nsTableColFrame * GetNextColumn(nsIFrame *aChildFrame);
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/** @return - the position of the first column in this colgroup in the table
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* colframe cache.
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*/
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PRInt32 GetStartColumnIndex();
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/** set the position of the first column in this colgroup in the table
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* colframe cache.
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*/
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void SetStartColumnIndex(PRInt32 aIndex);
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/** helper method to get the span attribute for this colgroup */
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PRInt32 GetSpan();
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/** provide access to the mFrames list
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*/
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nsFrameList& GetChildList();
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/** set the column index for all frames starting at aStartColFrame, it
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* will also reset the column indices in all subsequent colgroups
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* @param aFirstColGroup - start the reset operation inside this colgroup
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* @param aFirstColIndex - first column that is reset should get this index
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* @param aStartColFrame - if specified the reset starts with this column
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* inside the colgroup; if not specified, the reset
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* starts with the first column
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*/
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static void ResetColIndices(nsIFrame* aFirstColGroup,
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PRInt32 aFirstColIndex,
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nsIFrame* aStartColFrame = nsnull);
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/**
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* Gets inner border widths before collapsing with cell borders
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* Caller must get left border from previous column
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* GetContinuousBCBorderWidth will not overwrite aBorder.left
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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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* Set full border widths before collapsing with cell borders
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* @param aForSide - side to set; only accepts top and bottom
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*/
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void SetContinuousBCBorderWidth(PRUint8 aForSide,
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BCPixelSize aPixelValue);
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protected:
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nsTableColGroupFrame();
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void InsertColsReflow(nsPresContext& aPresContext,
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nsIPresShell& aPresShell,
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PRInt32 aColIndex,
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nsIFrame* aFirstFrame,
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nsIFrame* aLastFrame = nsnull);
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/** implement abstract method on nsHTMLContainerFrame */
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virtual PRIntn GetSkipSides() const;
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NS_IMETHOD IncrementalReflow(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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NS_IMETHOD IR_TargetIsMe(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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NS_IMETHOD IR_StyleChanged(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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NS_IMETHOD IR_TargetIsChild(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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nsIFrame * aNextFrame);
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// data members
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PRInt32 mColCount;
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// the starting column index this col group represents. Must be >= 0.
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PRInt32 mStartColIndex;
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// border width in pixels
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BCPixelSize mTopContBorderWidth;
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BCPixelSize mBottomContBorderWidth;
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};
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inline nsTableColGroupFrame::nsTableColGroupFrame()
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: mColCount(0), mStartColIndex(0)
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{
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SetColType(eColGroupContent);
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}
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inline PRInt32 nsTableColGroupFrame::GetStartColumnIndex()
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{
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return mStartColIndex;
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}
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inline void nsTableColGroupFrame::SetStartColumnIndex (PRInt32 aIndex)
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{
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mStartColIndex = aIndex;
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}
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inline PRInt32 nsTableColGroupFrame::GetColCount() const
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{
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return mColCount;
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}
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inline nsFrameList& nsTableColGroupFrame::GetChildList()
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{
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return mFrames;
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}
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#endif
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