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 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
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 * The contents of this file are subject to the Netscape 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
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 *
 * 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 Communicator client code.
 *
 * The Initial Developer of the Original Code is 
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either 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
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#ifndef nsDOMCSSDeclaration_h___
#define nsDOMCSSSDeclaration_h___

#include "nsIDOMCSSStyleDeclaration.h"
#include "nsIDOMCSS2Properties.h"

class nsCSSDeclaration;
class nsICSSParser;
class nsICSSLoader;
class nsIURI;

class CSS2PropertiesTearoff : public nsIDOMNSCSS2Properties
{
public:
  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_NSIDOMCSS2PROPERTIES
  NS_DECL_NSIDOMNSCSS2PROPERTIES

  CSS2PropertiesTearoff(nsIDOMCSSStyleDeclaration *aOuter);
  virtual ~CSS2PropertiesTearoff();

private:
  nsIDOMCSSStyleDeclaration* mOuter;
};

class nsDOMCSSDeclaration : public nsIDOMCSSStyleDeclaration
{
public:
  nsDOMCSSDeclaration();

  NS_DECL_ISUPPORTS

  // Require subclasses to implement |GetParentRule|.
  //NS_DECL_NSIDOMCSSSTYLEDECLARATION
  NS_IMETHOD GetCssText(nsAString & aCssText);
  NS_IMETHOD SetCssText(const nsAString & aCssText);
  NS_IMETHOD GetPropertyValue(const nsAString & propertyName,
                              nsAString & _retval);
  NS_IMETHOD GetPropertyCSSValue(const nsAString & propertyName,
                                 nsIDOMCSSValue **_retval);
  NS_IMETHOD RemoveProperty(const nsAString & propertyName,
                            nsAString & _retval);
  NS_IMETHOD GetPropertyPriority(const nsAString & propertyName,
                                 nsAString & _retval);
  NS_IMETHOD SetProperty(const nsAString & propertyName,
                         const nsAString & value, const nsAString & priority);
  NS_IMETHOD GetLength(PRUint32 *aLength);
  NS_IMETHOD Item(PRUint32 index, nsAString & _retval);
  NS_IMETHOD GetParentRule(nsIDOMCSSRule * *aParentRule) = 0; 

  virtual void DropReference() = 0;
protected:
  // Always fills in the out parameter, even on failure, and if the out
  // parameter is null the nsresult will be the correct thing to
  // propagate.
  virtual nsresult GetCSSDeclaration(nsCSSDeclaration **aDecl,
                                     PRBool aAllocate) = 0;
  virtual nsresult DeclarationChanged() = 0;
  
  // This will only fail if it can't get a parser.  This means it can
  // return NS_OK without aURI or aCSSLoader being initialized.
  virtual nsresult GetCSSParsingEnvironment(nsIURI** aBaseURI,
                                            nsICSSLoader** aCSSLoader,
                                            nsICSSParser** aCSSParser) = 0;

  nsresult ParsePropertyValue(const nsAString& aPropName,
                              const nsAString& aPropValue);
  nsresult ParseDeclaration(const nsAString& aDecl,
                            PRBool aParseOnlyOneDecl, PRBool aClearOldDecl);
  
protected:
  virtual ~nsDOMCSSDeclaration();

private:
  CSS2PropertiesTearoff mInner;
};

#endif // nsDOMCSSDeclaration_h___
