97 lines
3.3 KiB
C++
97 lines
3.3 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is Mozilla MathML Project.
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*
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* The Initial Developer of the Original Code is The University Of
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* Queensland. Portions created by The University Of Queensland are
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* Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
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*
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* Contributor(s):
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* Roger B. Sidje <rbs@maths.uq.edu.au>
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*/
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//
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// a helper frame class to wrap non-MathML frames so that foreign elements
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// (e.g., html:img) can mix better with other surrounding MathML markups
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//
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#include "nsCOMPtr.h"
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#include "nsHTMLParts.h"
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#include "nsIHTMLContent.h"
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#include "nsFrame.h"
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#include "nsAreaFrame.h"
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#include "nsLineLayout.h"
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#include "nsIPresContext.h"
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#include "nsHTMLAtoms.h"
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#include "nsUnitConversion.h"
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#include "nsIStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsINameSpaceManager.h"
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#include "nsIRenderingContext.h"
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#include "nsIFontMetrics.h"
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#include "nsStyleUtil.h"
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#include "nsMathMLForeignFrameWrapper.h"
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NS_IMPL_ADDREF_INHERITED(nsMathMLForeignFrameWrapper, nsMathMLFrame)
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NS_IMPL_RELEASE_INHERITED(nsMathMLForeignFrameWrapper, nsMathMLFrame)
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NS_IMPL_QUERY_INTERFACE_INHERITED1(nsMathMLForeignFrameWrapper, nsBlockFrame, nsMathMLFrame)
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nsresult
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NS_NewMathMLForeignFrameWrapper(nsIPresShell* aPresShell, nsIFrame** aNewFrame)
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{
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NS_PRECONDITION(aNewFrame, "null OUT ptr");
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if (nsnull == aNewFrame) {
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return NS_ERROR_NULL_POINTER;
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}
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nsMathMLForeignFrameWrapper* it = new (aPresShell) nsMathMLForeignFrameWrapper;
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if (nsnull == it) {
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return NS_ERROR_OUT_OF_MEMORY;
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}
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*aNewFrame = it;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMathMLForeignFrameWrapper::Init(nsIPresContext* aPresContext,
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nsIContent* aContent,
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nsIFrame* aParent,
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nsIStyleContext* aContext,
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nsIFrame* aPrevInFlow)
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{
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return nsBlockFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
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}
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NS_IMETHODIMP
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nsMathMLForeignFrameWrapper::Reflow(nsIPresContext* 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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// Let the base class do the reflow
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nsresult rv = nsBlockFrame::Reflow(aPresContext, aDesiredSize, aReflowState, aStatus);
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mReference.x = 0;
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mReference.y = aDesiredSize.ascent;
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// just make-up a bounding metrics
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mBoundingMetrics.Clear();
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mBoundingMetrics.ascent = aDesiredSize.ascent;
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mBoundingMetrics.descent = aDesiredSize.descent;
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mBoundingMetrics.width = aDesiredSize.width;
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mBoundingMetrics.leftBearing = 0;
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mBoundingMetrics.rightBearing = aDesiredSize.width;
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aDesiredSize.mBoundingMetrics = mBoundingMetrics;
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return rv;
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}
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