153 lines
4.7 KiB
C++
153 lines
4.7 KiB
C++
/* ***** 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 MathML Project.
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*
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* The Initial Developer of the Original Code is
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* The University Of Queensland.
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* Portions created by the Initial Developer are Copyright (C) 1999
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* the Initial Developer. 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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* 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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#include "nsCOMPtr.h"
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#include "nsFrame.h"
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#include "nsPresContext.h"
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#include "nsUnitConversion.h"
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#include "nsStyleContext.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(nsPresContext* 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(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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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 (aDesiredSize.mComputeMEW) {
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aDesiredSize.mMaxElementWidth = aDesiredSize.width;
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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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