/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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 * Version: NPL 1.1/GPL 2.0/LGPL 2.1
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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.
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 * The Original Code is mozilla.org code.
 *
 * The Initial Developer of the Original Code is 
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 * the Initial Developer. All Rights Reserved.
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 * Contributor(s):
 *
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#ifndef nsIStyledContent_h___
#define nsIStyledContent_h___

#include "nsIContent.h"
#include "nsChangeHint.h"

class nsString;
class nsICSSStyleRule;
class nsISupportsArray;
class nsRuleWalker;
class nsAttrValue;

// 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:
  NS_DEFINE_STATIC_IID_ACCESSOR(NS_ISTYLEDCONTENT_IID)

  // XXX Currently callers (e.g., CSSStyleSheetImpl) assume that the ID
  // corresponds to the attribute nsHTMLAtoms::id and that the Class
  // corresponds to the attribute nsHTMLAtoms::kClass.  If this becomes
  // incorrect, then new methods need to be added here.
  NS_IMETHOD GetID(nsIAtom** aResult) const = 0;
  virtual const nsAttrValue* GetClasses() const = 0;
  NS_IMETHOD_(PRBool) HasClass(nsIAtom* aClass, PRBool aCaseSensitive) const = 0;

  NS_IMETHOD WalkContentStyleRules(nsRuleWalker* aRuleWalker) = 0;

  NS_IMETHOD GetInlineStyleRule(nsICSSStyleRule** aStyleRule) = 0;
  NS_IMETHOD SetInlineStyleRule(nsICSSStyleRule* aStyleRule, PRBool aNotify) = 0;

  /**
   * Is the attribute named stored in the mapped attributes?
   *
   * This really belongs on nsIHTMLContent instead.
   */
  NS_IMETHOD_(PRBool) IsAttributeMapped(const nsIAtom* aAttribute) const = 0;


  /**
   * Get a hint that tells the style system what to do when 
   * an attribute on this node changes, if something needs to happen
   * in response to the change *other* than the result of what is
   * mapped into style data via any type of style rule.
   */
  NS_IMETHOD GetAttributeChangeHint(const nsIAtom* aAttribute,
                                    PRInt32 aModType, 
                                    nsChangeHint& aHint) const = 0;

};

#endif /* nsIStyledContent_h___ */
