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 *
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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.
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 * The Initial Developer of the Original Code is
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 * Portions created by the Initial Developer are Copyright (C) 1998
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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   \
{ 0xa7b53093, 0x3516, 0x4392, { 0xb3, 0x3e, 0x12, 0xc0, 0x0d, 0xe7, 0x85, 0xaa } };

// 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.
  virtual nsIAtom* GetID() const = 0;
  virtual const nsAttrValue* GetClasses() const = 0;
  NS_IMETHOD_(PRBool) HasClass(nsIAtom* aClass, PRBool aCaseSensitive) const = 0;

  NS_IMETHOD WalkContentStyleRules(nsRuleWalker* aRuleWalker) = 0;

  virtual nsICSSStyleRule* GetInlineStyleRule() = 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.
   */
  virtual nsChangeHint GetAttributeChangeHint(const nsIAtom* aAttribute,
                                              PRInt32 aModType) const = 0;


  /**
   * Returns an atom holding the name of the "class" attribute on this
   * content node (if applicable).  Returns null for non-element
   * content nodes.
   */
  virtual nsIAtom *GetClassAttributeName() const = 0;

};

#endif /* nsIStyledContent_h___ */