michael@0: /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #ifndef nsMathMLmsqrtFrame_h___
michael@0: #define nsMathMLmsqrtFrame_h___
michael@0: 
michael@0: #include "mozilla/Attributes.h"
michael@0: #include "nsMathMLmencloseFrame.h"
michael@0: 
michael@0: //
michael@0: // <msqrt> -- form a radical
michael@0: //
michael@0: 
michael@0: /*
michael@0: The MathML REC describes:
michael@0: 
michael@0: The <msqrt> element is used to display square roots.
michael@0: The syntax for <msqrt> is:
michael@0:   <msqrt> base </msqrt>
michael@0: 
michael@0: Attributes of <msqrt> and <mroot>:
michael@0: 
michael@0: None (except the attributes allowed for all MathML elements, listed in Section
michael@0: 2.3.4). 
michael@0: 
michael@0: The <mroot> element increments scriptlevel by 2, and sets displaystyle to
michael@0: "false", within index, but leaves both attributes unchanged within base. The
michael@0: <msqrt> element leaves both attributes unchanged within all its arguments.
michael@0: These attributes are inherited by every element from its rendering environment,
michael@0: but can be set explicitly only on <mstyle>. (See Section 3.3.4.) 
michael@0: */
michael@0: 
michael@0: class nsMathMLmsqrtFrame : public nsMathMLmencloseFrame {
michael@0: public:
michael@0:   NS_DECL_FRAMEARENA_HELPERS
michael@0: 
michael@0:   friend nsIFrame* NS_NewMathMLmsqrtFrame(nsIPresShell*   aPresShell,
michael@0:                                           nsStyleContext* aContext);
michael@0: 
michael@0:   virtual void
michael@0:   Init(nsIContent* aContent,
michael@0:        nsIFrame*   aParent,
michael@0:        nsIFrame*   aPrevInFlow) MOZ_OVERRIDE;
michael@0: 
michael@0:   NS_IMETHOD
michael@0:   InheritAutomaticData(nsIFrame* aParent) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual nsresult
michael@0:   AttributeChanged(int32_t         aNameSpaceID,
michael@0:                    nsIAtom*        aAttribute,
michael@0:                    int32_t         aModType) MOZ_OVERRIDE;
michael@0: 
michael@0:   virtual bool
michael@0:   IsMrowLike() MOZ_OVERRIDE
michael@0:   {
michael@0:     return mFrames.FirstChild() != mFrames.LastChild() ||
michael@0:            !mFrames.FirstChild();
michael@0:   }
michael@0: 
michael@0: protected:
michael@0:   nsMathMLmsqrtFrame(nsStyleContext* aContext);
michael@0:   virtual ~nsMathMLmsqrtFrame();
michael@0: };
michael@0: 
michael@0: #endif /* nsMathMLmsqrtFrame_h___ */
michael@0: