gecko-dev/layout/mathml/nsMathMLTokenFrame.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * 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 Original Code is
 * The University Of Queensland.
 * Portions created by the Initial Developer are Copyright (C) 1999
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   Roger B. Sidje <rbs@maths.uq.edu.au>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#ifndef nsMathMLTokenFrame_h___
#define nsMathMLTokenFrame_h___

#include "nsCOMPtr.h"
#include "nsMathMLContainerFrame.h"

//
// Base class to handle token elements
//

class nsMathMLTokenFrame : public nsMathMLContainerFrame {
public:
  NS_DECL_FRAMEARENA_HELPERS

  friend nsIFrame* NS_NewMathMLTokenFrame(nsIPresShell* aPresShell, nsStyleContext* aContext);

  NS_IMETHOD
  TransmitAutomaticData() {
    // The REC defines the following elements to be space-like:
    // * an mtext, mspace, maligngroup, or malignmark element;
    if (mContent->Tag() == nsGkAtoms::mtext_) {
      mPresentationData.flags |= NS_MATHML_SPACE_LIKE;
    }
    return NS_OK;
  }

  NS_IMETHOD
  InheritAutomaticData(nsIFrame* aParent);

  virtual eMathMLFrameType GetMathMLFrameType();

  NS_IMETHOD
  Init(nsIContent*      aContent,
       nsIFrame*        aParent,
       nsIFrame*        aPrevInFlow);

  NS_IMETHOD
  SetInitialChildList(ChildListID     aListID,
                      nsFrameList&    aChildList);

  NS_IMETHOD
  Reflow(nsPresContext*          aPresContext,
         nsHTMLReflowMetrics&     aDesiredSize,
         const nsHTMLReflowState& aReflowState,
         nsReflowStatus&          aStatus);

  virtual nsresult
  Place(nsRenderingContext& aRenderingContext,
        PRBool               aPlaceOrigin,
        nsHTMLReflowMetrics& aDesiredSize);

  virtual void MarkIntrinsicWidthsDirty();

  NS_IMETHOD
  AttributeChanged(PRInt32         aNameSpaceID,
                   nsIAtom*        aAttribute,
                   PRInt32         aModType);

  virtual nsresult
  ChildListChanged(PRInt32 aModType)
  {
    ProcessTextData();
    return nsMathMLContainerFrame::ChildListChanged(aModType);
  }

protected:
  nsMathMLTokenFrame(nsStyleContext* aContext) : nsMathMLContainerFrame(aContext) {}
  virtual ~nsMathMLTokenFrame();

  virtual PRIntn GetSkipSides() const { return 0; }

  // hook to perform MathML-specific actions depending on the tag
  virtual void ProcessTextData();

  // helper to set the style of <mi> which has to be italic or normal
  // depending on its textual content
  PRBool SetTextStyle();

  // helper to set the quotes of <ms>
  void SetQuotes(PRBool aNotify);
};

#endif /* nsMathMLTokentFrame_h___ */