90 lines
3.3 KiB
C++
90 lines
3.3 KiB
C++
/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 The University Of
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* Queensland. Portions created by The University Of Queensland are
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* Copyright (C) 1999 The University Of Queensland. 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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#ifndef nsIMathMLFrame_h___
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#define nsIMathMLFrame_h___
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// IID for the nsIMathMLFrame interface (the IID was taken from IIDS.h)
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/* a6cf9113-15b3-11d2-932e-00805f8add32 */
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#define NS_IMATHMLFRAME_IID \
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{ 0xa6cf9113, 0x15b3, 0x11d2, \
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{ 0x93, 0x2e, 0x00, 0x80, 0x5f, 0x8a, 0xdd, 0x32 } }
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static NS_DEFINE_IID(kIMathMLFrameIID, NS_IMATHMLFRAME_IID);
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class nsIMathMLFrame : public nsISupports {
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public:
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static const nsIID& GetIID() { static nsIID iid = NS_IMATHMLFRAME_IID; return iid; }
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/* SUPPORT FOR STRETCHY ELEMENTS: <mo> */
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/*====================================================================*/
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/* Stretch :
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* method used to ask a stretchy MathML frame to stretch
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* itself depending on its context
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*/
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NS_IMETHOD
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Stretch(nsIPresContext& aPresContext,
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nsStretchDirection aStretchDirection,
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nsCharMetrics& aContainerSize,
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nsCharMetrics& aDesiredStretchSize) = 0;
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/* SUPPORT FOR SCRIPTING ELEMENTS: */
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/*====================================================================*/
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/* GetPresentationData :
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* returns the scriptlevel and displaystyle of the frame
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*/
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NS_IMETHOD
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GetPresentationData(PRInt32* aScriptLevel,
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PRBool* aDisplayStyle) = 0;
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/* UpdatePresentationData :
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* Increments the scriptlevel of the frame, and set its displaystyle.
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* Note that <mstyle> is the only tag which allows to set
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* <mstyle displaystyle="true|false" scriptlevel="[+|-]number">
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* Therefore <mstyle> has its peculiar version of this method.
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*/
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NS_IMETHOD
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UpdatePresentationData(PRInt32 aScriptLevelIncrement,
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PRBool aDisplayStyle) = 0;
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/* UpdatePresentationDataFromChildAt :
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* Increments the scriplevel and set the display level on the whole tree.
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* For child frames at: aIndex, aIndex+1, aIndex+2, etc, this method set
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* their mDisplayStyle to aDisplayStyle and increment their mScriptLevel
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* with aScriptLevelIncrement. The increment is propagated down to the
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* subtrees of each of these child frames. Note that <mstyle> is the only
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* tag which allows <mstyle displaystyle="true|false" scriptlevel="[+|-]number">
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* to reset or increment the scriptlevel in a manual way. Therefore <mstyle>
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* has its own peculiar version of this method.
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*/
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NS_IMETHOD
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UpdatePresentationDataFromChildAt(PRInt32 aIndex,
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PRInt32 aScriptLevelIncrement,
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PRBool aDisplayStyle) = 0;
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};
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#endif /* nsIMathMLFrame_h___ */
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