138 lines
3.9 KiB
C++
138 lines
3.9 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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#include "nsCOMPtr.h"
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#include "nsFrame.h"
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#include "nsIPresContext.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 "nsIRenderingContext.h"
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#include "nsIFontMetrics.h"
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#include "nsMathMLmspaceFrame.h"
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//
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// <mspace> -- space - implementation
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//
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nsresult
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NS_NewMathMLmspaceFrame(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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nsMathMLmspaceFrame* it = new (aPresShell) nsMathMLmspaceFrame;
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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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nsMathMLmspaceFrame::nsMathMLmspaceFrame()
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{
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}
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nsMathMLmspaceFrame::~nsMathMLmspaceFrame()
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{
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}
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void
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nsMathMLmspaceFrame::ProcessAttributes(nsIPresContext* aPresContext)
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{
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/*
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parse the attributes
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width = number h-unit
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height = number v-unit
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depth = number v-unit
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*/
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nsAutoString value;
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nsCSSValue cssValue;
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// width
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mWidth = 0;
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if (NS_CONTENT_ATTR_HAS_VALUE == GetAttribute(mContent, mPresentationData.mstyle,
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nsMathMLAtoms::width_, value)) {
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if ((ParseNumericValue(value, cssValue) ||
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ParseNamedSpaceValue(mPresentationData.mstyle, value, cssValue)) &&
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cssValue.IsLengthUnit()) {
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mWidth = CalcLength(aPresContext, mStyleContext, cssValue);
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}
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}
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// height
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mHeight = 0;
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if (NS_CONTENT_ATTR_HAS_VALUE == GetAttribute(mContent, mPresentationData.mstyle,
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nsMathMLAtoms::height_, value)) {
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if ((ParseNumericValue(value, cssValue) ||
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ParseNamedSpaceValue(mPresentationData.mstyle, value, cssValue)) &&
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cssValue.IsLengthUnit()) {
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mHeight = CalcLength(aPresContext, mStyleContext, cssValue);
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}
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}
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// depth
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mDepth = 0;
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if (NS_CONTENT_ATTR_HAS_VALUE == GetAttribute(mContent, mPresentationData.mstyle,
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nsMathMLAtoms::depth_, value)) {
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if ((ParseNumericValue(value, cssValue) ||
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ParseNamedSpaceValue(mPresentationData.mstyle, value, cssValue)) &&
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cssValue.IsLengthUnit()) {
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mDepth = CalcLength(aPresContext, mStyleContext, cssValue);
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}
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}
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}
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NS_IMETHODIMP
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nsMathMLmspaceFrame::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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ProcessAttributes(aPresContext);
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mBoundingMetrics.Clear();
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mBoundingMetrics.width = mWidth;
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mBoundingMetrics.ascent = mHeight;
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mBoundingMetrics.descent = mDepth;
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aDesiredSize.ascent = mHeight;
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aDesiredSize.descent = mDepth;
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aDesiredSize.width = mWidth;
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aDesiredSize.height = aDesiredSize.ascent + aDesiredSize.descent;
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if (nsnull != aDesiredSize.maxElementSize) {
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aDesiredSize.maxElementSize->width = aDesiredSize.width;
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aDesiredSize.maxElementSize->height = aDesiredSize.height;
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}
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// Also return our bounding metrics
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aDesiredSize.mBoundingMetrics = mBoundingMetrics;
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aStatus = NS_FRAME_COMPLETE;
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NS_FRAME_SET_TRUNCATION(aStatus, aReflowState, aDesiredSize);
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return NS_OK;
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}
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