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nsIFrameSetElement.h

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
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 * 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
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 * for the specific language governing rights and limitations under the
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 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 2002
 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *   Boris Zbarsky <bzbarsky@mit.edu>  (Original author)
 *
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#ifndef nsIFramesetElement_h___
#define nsIFramesetElement_h___

#include "nsISupports.h"

// IID for the nsIFramesetElement interface
#define NS_IFRAMESETELEMENT_IID \
{ 0xeefe0fe5, 0x44ac, 0x4d7f, \
  { 0xa7, 0x51, 0xf4, 0xaa, 0x5f, 0x22, 0xb0, 0xbf } }

/**
 * The nsFramesetUnit enum is used to denote the type of each entry
 * in the row or column spec.
 */
enum nsFramesetUnit {
  eFramesetUnit_Fixed = 0,
  eFramesetUnit_Percent,
  eFramesetUnit_Relative
};

/**
 * The nsFramesetSpec struct is used to hold a single entry in the
 * row or column spec.
 */
00063 struct nsFramesetSpec {
  nsFramesetUnit mUnit;
  nscoord        mValue;
};

/**
 * This interface is used by the nsFramesetFrame to access the parsed
 * values of the "rows" and "cols" attributes
 */
00072 class nsIFrameSetElement : public nsISupports {
public:

  NS_DECLARE_STATIC_IID_ACCESSOR(NS_IFRAMESETELEMENT_IID)

  /**
   * GetRowSpec is used to get the "rows" spec.
   * @param out PRInt32 aNumValues The number of row sizes specified.
   * @param out nsFramesetSpec* aSpecs The array of size specifications.
            This is _not_ owned by the caller, but by the nsIFrameSetElement
            implementation.  DO NOT DELETE IT.
   * @exceptions NS_ERROR_OUT_OF_MEMORY
   */
  NS_IMETHOD GetRowSpec(PRInt32 *aNumValues, const nsFramesetSpec** aSpecs) = 0;

  /**
   * GetColSpec is used to get the "cols" spec
   * @param out PRInt32 aNumValues The number of row sizes specified.
   * @param out nsFramesetSpec* aSpecs The array of size specifications.
            This is _not_ owned by the caller, but by the nsIFrameSetElement
            implementation.  DO NOT DELETE IT.
   * @exceptions NS_ERROR_OUT_OF_MEMORY
   */
  NS_IMETHOD GetColSpec(PRInt32 *aNumValues, const nsFramesetSpec** aSpecs) = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsIFrameSetElement, NS_IFRAMESETELEMENT_IID)

#endif // nsIFramesetElement_h___

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