gecko-dev/layout/mathml/nsMathMLForeignFrameWrapper...

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/* -*- 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
//
#include "nsCOMPtr.h"
#include "nsHTMLParts.h"
#include "nsFrame.h"
#include "nsBlockFrame.h"
#include "nsLineLayout.h"
#include "nsPresContext.h"
#include "nsStyleContext.h"
#include "nsStyleConsts.h"
#include "nsIRenderingContext.h"
#include "nsIFontMetrics.h"
#include "nsMathMLForeignFrameWrapper.h"
NS_QUERYFRAME_HEAD(nsMathMLForeignFrameWrapper)
NS_QUERYFRAME_ENTRY(nsMathMLFrame)
NS_QUERYFRAME_TAIL_INHERITING(nsBlockFrame)
nsIFrame*
NS_NewMathMLForeignFrameWrapper(nsIPresShell* aPresShell, nsStyleContext* aContext)
{
return new (aPresShell) nsMathMLForeignFrameWrapper(aContext);
}
NS_IMPL_FRAMEARENA_HELPERS(nsMathMLForeignFrameWrapper)
NS_IMETHODIMP
nsMathMLForeignFrameWrapper::Reflow(nsPresContext* aPresContext,
nsHTMLReflowMetrics& aDesiredSize,
const nsHTMLReflowState& aReflowState,
nsReflowStatus& aStatus)
{
// Let the base class do the reflow
nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
mReference.x = 0;
mReference.y = aDesiredSize.ascent;
// just make-up a bounding metrics
mBoundingMetrics.Clear();
mBoundingMetrics.ascent = aDesiredSize.ascent;
mBoundingMetrics.descent = aDesiredSize.height - aDesiredSize.ascent;
mBoundingMetrics.width = aDesiredSize.width;
mBoundingMetrics.leftBearing = 0;
mBoundingMetrics.rightBearing = aDesiredSize.width;
aDesiredSize.mBoundingMetrics = mBoundingMetrics;
NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
return rv;
}