161 lines
5.0 KiB
C++
161 lines
5.0 KiB
C++
/*
|
|
* 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 The Original Code is The University Of
|
|
* Queensland. Portions created by The University Of Queensland are
|
|
* Copyright (C) 1999 The University Of Queensland. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Roger B. Sidje <rbs@maths.uq.edu.au>
|
|
* David J. Fiddes <D.J.Fiddes@hw.ac.uk>
|
|
*/
|
|
|
|
|
|
#include "nsCOMPtr.h"
|
|
#include "nsHTMLParts.h"
|
|
#include "nsIHTMLContent.h"
|
|
#include "nsFrame.h"
|
|
#include "nsLineLayout.h"
|
|
#include "nsHTMLIIDs.h"
|
|
#include "nsIPresContext.h"
|
|
#include "nsHTMLAtoms.h"
|
|
#include "nsUnitConversion.h"
|
|
#include "nsIStyleContext.h"
|
|
#include "nsStyleConsts.h"
|
|
#include "nsStyleChangeList.h"
|
|
#include "nsINameSpaceManager.h"
|
|
#include "nsIRenderingContext.h"
|
|
#include "nsIFontMetrics.h"
|
|
#include "nsStyleUtil.h"
|
|
|
|
#include "nsIDOMText.h"
|
|
#include "nsITextContent.h"
|
|
|
|
#include "nsMathMLmiFrame.h"
|
|
|
|
//
|
|
// <mi> -- identifier - implementation
|
|
//
|
|
|
|
nsresult
|
|
NS_NewMathMLmiFrame(nsIFrame** aNewFrame)
|
|
{
|
|
NS_PRECONDITION(aNewFrame, "null OUT ptr");
|
|
if (nsnull == aNewFrame) {
|
|
return NS_ERROR_NULL_POINTER;
|
|
}
|
|
nsMathMLmiFrame* it = new nsMathMLmiFrame;
|
|
if (nsnull == it) {
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
}
|
|
*aNewFrame = it;
|
|
return NS_OK;
|
|
}
|
|
|
|
nsMathMLmiFrame::nsMathMLmiFrame()
|
|
{
|
|
}
|
|
|
|
nsMathMLmiFrame::~nsMathMLmiFrame()
|
|
{
|
|
}
|
|
|
|
|
|
NS_IMETHODIMP
|
|
nsMathMLmiFrame::Init(nsIPresContext* aPresContext,
|
|
nsIContent* aContent,
|
|
nsIFrame* aParent,
|
|
nsIStyleContext* aContext,
|
|
nsIFrame* aPrevInFlow)
|
|
{
|
|
nsresult rv = NS_OK;
|
|
rv = nsMathMLContainerFrame::Init(aPresContext, aContent, aParent, aContext, aPrevInFlow);
|
|
return rv;
|
|
}
|
|
|
|
// if our content is a single character, we turn the font to italic
|
|
// if our content is not a single character, we turn the font to normal
|
|
// XXX TrimWhitespace / CompressWhitespace?
|
|
|
|
NS_IMETHODIMP
|
|
nsMathMLmiFrame::SetInitialChildList(nsIPresContext* aPresContext,
|
|
nsIAtom* aListName,
|
|
nsIFrame* aChildList)
|
|
{
|
|
nsresult rv;
|
|
|
|
// First, let the base class do its work
|
|
rv = nsMathMLContainerFrame::SetInitialChildList(aPresContext, aListName, aChildList);
|
|
|
|
|
|
// Get the length of the text content that we enclose
|
|
// our content can include comment-nodes, attribute-nodes, text-nodes...
|
|
// we use the DOM to make sure that we are only looking at text-nodes...
|
|
PRInt32 aLength = 0;
|
|
PRInt32 numKids;
|
|
mContent->ChildCount(numKids);
|
|
// nsAutoString aData;
|
|
for (PRInt32 kid=0; kid<numKids; kid++) {
|
|
nsCOMPtr<nsIContent> kidContent;
|
|
mContent->ChildAt(kid, *getter_AddRefs(kidContent));
|
|
if (kidContent.get()) {
|
|
nsCOMPtr<nsIDOMText> kidText(do_QueryInterface(kidContent));
|
|
if (kidText.get()) {
|
|
PRUint32 kidLength;
|
|
kidText->GetLength(&kidLength);
|
|
aLength += kidLength;
|
|
// nsAutoString kidData;
|
|
// kidText->GetData(kidData);
|
|
// aData += kidData;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Insert a new pseudo frame between our children and us, i.e., the new frame
|
|
// becomes our sole child, and our children become children of the new frame.
|
|
nsIFrame* firstChild = mFrames.FirstChild();
|
|
if (firstChild) {
|
|
// Get a pseudo style context for the appropriate style font
|
|
// XXX how important is the PseudoStyleContext?
|
|
nsAutoString fontStyle = (1 == aLength)
|
|
? ":-moz-math-font-style-italic"
|
|
: ":-moz-math-font-style-normal";
|
|
nsCOMPtr<nsIAtom> fontAtom(getter_AddRefs(NS_NewAtom(fontStyle)));
|
|
nsCOMPtr<nsIStyleContext> newStyleContext;
|
|
aPresContext->ResolvePseudoStyleContextFor(mContent, fontAtom, mStyleContext,
|
|
PR_FALSE, getter_AddRefs(newStyleContext));
|
|
|
|
if (newStyleContext && newStyleContext.get() != mStyleContext) {
|
|
|
|
nsIFrame* newFrame = nsnull;
|
|
NS_NewMathMLWrapperFrame(&newFrame);
|
|
NS_ASSERTION(newFrame, "Failed to create new frame");
|
|
|
|
newFrame->Init(aPresContext, mContent, this, newStyleContext, nsnull);
|
|
|
|
// our children become children of the new frame
|
|
nsIFrame* childFrame = firstChild;
|
|
while (childFrame) {
|
|
childFrame->SetParent(newFrame);
|
|
aPresContext->ReParentStyleContext(childFrame, newStyleContext);
|
|
childFrame->GetNextSibling(&childFrame);
|
|
}
|
|
newFrame->SetInitialChildList(aPresContext, nsnull, firstChild);
|
|
|
|
// the new frame becomes our sole child
|
|
mFrames.SetFrames(newFrame);
|
|
}
|
|
}
|
|
return rv;
|
|
}
|