gecko/layout/mathml/nsMathMLForeignFrameWrapper.h

122 lines
4.3 KiB
C++

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla MathML Project.
*
* The Initial Developer of the Original Code is
* The University Of Queensland.
* Portions created by the Initial Developer are Copyright (C) 1999
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Roger B. Sidje <rbs@maths.uq.edu.au>
*
* Alternatively, the contents of this file may be used under the terms of
* either of the GNU General Public License Version 2 or later (the "GPL"),
* or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
//
// a helper frame class to wrap non-MathML frames so that foreign elements
// (e.g., html:img) can mix better with other surrounding MathML markups
//
#ifndef nsMathMLForeignFrameWrapper_h___
#define nsMathMLForeignFrameWrapper_h___
#include "nsCOMPtr.h"
#include "nsMathMLContainerFrame.h"
class nsMathMLForeignFrameWrapper : public nsBlockFrame,
public nsMathMLFrame {
public:
friend nsIFrame* NS_NewMathMLForeignFrameWrapper(nsIPresShell* aPresShell, nsStyleContext* aContext);
NS_DECL_QUERYFRAME
// Overloaded nsIMathMLFrame methods
NS_IMETHOD
UpdatePresentationDataFromChildAt(PRInt32 aFirstIndex,
PRInt32 aLastIndex,
PRUint32 aFlagsValues,
PRUint32 aFlagsToUpdate)
{
nsMathMLContainerFrame::PropagatePresentationDataFromChildAt(this,
aFirstIndex, aLastIndex, aFlagsValues, aFlagsToUpdate);
return NS_OK;
}
// overloaded nsBlockFrame methods
#ifdef NS_DEBUG
NS_IMETHOD
SetInitialChildList(nsIAtom* aListName,
nsFrameList& aChildList)
{
NS_ASSERTION(aChildList.NotEmpty() && aChildList.GetLength() == 1,
"there must be one and only one child frame");
return nsBlockFrame::SetInitialChildList(aListName, aChildList);
}
#endif
NS_IMETHOD
Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus);
// we are just a wrapper and these methods shouldn't be called
NS_IMETHOD
AppendFrames(nsIAtom* aListName,
nsFrameList& aFrameList)
{
NS_NOTREACHED("unsupported operation");
return NS_ERROR_NOT_IMPLEMENTED;
}
NS_IMETHOD
InsertFrames(nsIAtom* aListName,
nsIFrame* aPrevFrame,
nsFrameList& aFrameList)
{
NS_NOTREACHED("unsupported operation");
return NS_ERROR_NOT_IMPLEMENTED;
}
// Our life is bound to the life of our unique child.
// When our child goes away, we ask our parent to delete us
NS_IMETHOD
RemoveFrame(nsIAtom* aListName,
nsIFrame* aOldFrame)
{
return mParent->RemoveFrame(aListName, this);
}
protected:
nsMathMLForeignFrameWrapper(nsStyleContext* aContext) : nsBlockFrame(aContext) {}
virtual ~nsMathMLForeignFrameWrapper() {}
};
#endif /* nsMathMLForeignFrameWrapper_h___ */