зеркало из https://github.com/mozilla/pjs.git
138 строки
5.1 KiB
C++
138 строки
5.1 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** 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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* David J. Fiddes <D.J.Fiddes@hw.ac.uk>
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* Frederic Wang <fred.wang@free.fr>
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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 "nsStyleContext.h"
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#include "nsStyleConsts.h"
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#include "nsINameSpaceManager.h"
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#include "nsMathMLmstyleFrame.h"
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//
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// <mstyle> -- style change
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//
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nsIFrame*
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NS_NewMathMLmstyleFrame(nsIPresShell* aPresShell, nsStyleContext* aContext)
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{
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return new (aPresShell) nsMathMLmstyleFrame(aContext);
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}
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NS_IMPL_FRAMEARENA_HELPERS(nsMathMLmstyleFrame)
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nsMathMLmstyleFrame::~nsMathMLmstyleFrame()
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{
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}
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// mstyle needs special care for its scriptlevel and displaystyle attributes
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NS_IMETHODIMP
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nsMathMLmstyleFrame::InheritAutomaticData(nsIFrame* aParent)
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{
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// let the base class get the default from our parent
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nsMathMLContainerFrame::InheritAutomaticData(aParent);
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// sync with our current state
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mPresentationData.flags |= NS_MATHML_STRETCH_ALL_CHILDREN_VERTICALLY;
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mPresentationData.mstyle = this;
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// see if the displaystyle attribute is there
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nsMathMLFrame::FindAttrDisplaystyle(mContent, mPresentationData);
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// see if the directionality attribute is there
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nsMathMLFrame::FindAttrDirectionality(mContent, mPresentationData);
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMathMLmstyleFrame::TransmitAutomaticData()
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{
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return TransmitAutomaticDataForMrowLikeElement();
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}
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// displaystyle and scriptlevel are special in <mstyle>...
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// Since UpdatePresentation() and UpdatePresentationDataFromChildAt() can be called
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// by a parent, ensure that the explicit attributes of <mstyle> take precedence
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NS_IMETHODIMP
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nsMathMLmstyleFrame::UpdatePresentationData(PRUint32 aFlagsValues,
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PRUint32 aWhichFlags)
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{
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if (NS_MATHML_HAS_EXPLICIT_DISPLAYSTYLE(mPresentationData.flags)) {
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// our current state takes precedence, disallow updating the displastyle
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aWhichFlags &= ~NS_MATHML_DISPLAYSTYLE;
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aFlagsValues &= ~NS_MATHML_DISPLAYSTYLE;
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}
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return nsMathMLContainerFrame::UpdatePresentationData(aFlagsValues, aWhichFlags);
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}
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NS_IMETHODIMP
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nsMathMLmstyleFrame::UpdatePresentationDataFromChildAt(PRInt32 aFirstIndex,
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PRInt32 aLastIndex,
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PRUint32 aFlagsValues,
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PRUint32 aWhichFlags)
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{
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if (NS_MATHML_HAS_EXPLICIT_DISPLAYSTYLE(mPresentationData.flags)) {
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// our current state takes precedence, disallow updating the displastyle
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aWhichFlags &= ~NS_MATHML_DISPLAYSTYLE;
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aFlagsValues &= ~NS_MATHML_DISPLAYSTYLE;
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}
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// let the base class worry about the update
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return
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nsMathMLContainerFrame::UpdatePresentationDataFromChildAt(
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aFirstIndex, aLastIndex, aFlagsValues, aWhichFlags);
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}
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NS_IMETHODIMP
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nsMathMLmstyleFrame::AttributeChanged(PRInt32 aNameSpaceID,
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nsIAtom* aAttribute,
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PRInt32 aModType)
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{
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// Other attributes can affect too many things, ask our parent to re-layout
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// its children so that we can pick up changes in our attributes & transmit
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// them in our subtree. However, our siblings will be re-laid too. We used
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// to have a more speedier but more verbose alternative that didn't re-layout
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// our siblings. See bug 114909 - attachment 67668.
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return ReLayoutChildren(mParent);
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}
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