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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
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 *
 * Software distributed under the License is distributed on an "AS IS" basis,
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 * for the specific language governing rights and limitations under the
 * License.
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 * The Original Code is mozilla.org code.
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 * 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.
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 * Contributor(s):
 *
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 * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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#ifndef nsIStyledContent_h___
#define nsIStyledContent_h___

#include "nsIContent.h"

class nsString;
class nsIStyleRule;
class nsIStyleContext;
class nsISupportsArray;
class nsRuleWalker;

// IID for the nsIStyledContent class
#define NS_ISTYLEDCONTENT_IID   \
{ 0xc1e84e01, 0xcd15, 0x11d2, { 0x96, 0xed, 0x0, 0x10, 0x4b, 0x7b, 0x7d, 0xeb } }

// Abstract interface for all styled content (that supports ID, CLASS, STYLE, and
// the ability to specify style hints on an attribute change).
class nsIStyledContent : public nsIContent {
public:
  static const nsIID& GetIID() { static nsIID iid = NS_ISTYLEDCONTENT_IID; return iid; }

  NS_IMETHOD GetID(nsIAtom*& aResult) const = 0;
  NS_IMETHOD GetClasses(nsVoidArray& aArray) const = 0;
  NS_IMETHOD HasClass(nsIAtom* aClass, PRBool aCaseSensitive) const = 0;

  NS_IMETHOD WalkContentStyleRules(nsRuleWalker* aRuleWalker) = 0;
  NS_IMETHOD WalkInlineStyleRules(nsRuleWalker* aRuleWalker) = 0;

  /** NRA ***
   * Get a hint that tells the style system what to do when 
   * an attribute on this node changes.
   * This only applies to attributes that map their value
   * DIRECTLY into style contexts via NON-CSS style rules
   * All other attributes return NS_STYLE_HINT_CONTENT
   */
  NS_IMETHOD GetMappedAttributeImpact(const nsIAtom* aAttribute, PRInt32 aModType, 
                                      PRInt32& aHint) const = 0;

};

#endif /* nsIStyledContent_h___ */