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 *
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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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#ifndef nsPersistentProperties_h___
#define nsPersistentProperties_h___

#include "nsIPersistentProperties2.h"
#include "pldhash.h"
#include "plarena.h"

class nsIUnicharInputStream;

class nsPersistentProperties : public nsIPersistentProperties
{
public:
  nsPersistentProperties();
  virtual ~nsPersistentProperties();

  NS_DECL_ISUPPORTS
  NS_DECL_NSIPROPERTIES

  // nsIPersistentProperties methods:
  NS_IMETHOD Load(nsIInputStream* aIn);
  NS_IMETHOD Save(nsIOutputStream* aOut, const nsString& aHeader);
  NS_IMETHOD Subclass(nsIPersistentProperties* aSubclass);
  NS_IMETHOD EnumerateProperties(nsIBidirectionalEnumerator* *aResult);
  NS_IMETHOD SimpleEnumerateProperties(nsISimpleEnumerator** aResult);

  // XXX these 2 methods will be subsumed by the ones from 
  // nsIProperties once we figure this all out
  NS_IMETHOD GetStringProperty(const nsAString& aKey, nsAString& aValue);
  NS_IMETHOD SetStringProperty(const nsAString& aKey, nsAString& aNewValue,
                               nsAString& aOldValue);

  // nsPersistentProperties methods:
  PRInt32 Read();
  PRInt32 SkipLine(PRInt32 c);
  PRInt32 SkipWhiteSpace(PRInt32 c);

  static NS_METHOD
  Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);

protected:
  nsIUnicharInputStream* mIn;
  PRUint32 mBufferPos;
  PRUint32 mBufferLength;
  nsIPersistentProperties* mSubclass;
  struct PLDHashTable mTable;
  PLArenaPool mArena;
};

class nsPropertyElement : public nsIPropertyElement 
{
public:
  nsPropertyElement()
  {
    NS_INIT_ISUPPORTS();
  }

  nsPropertyElement(const PRUnichar *aKey, const PRUnichar *aValue)
    : mKey(aKey), mValue(aValue)
  {
    NS_INIT_ISUPPORTS();
  }

  virtual ~nsPropertyElement() {}

  NS_DECL_ISUPPORTS

  static NS_METHOD
  Create(nsISupports *aOuter, REFNSIID aIID, void **aResult);

  // nsIPropertyElement methods:
  NS_IMETHOD GetKey(PRUnichar **aReturnKey);
  NS_IMETHOD GetValue(PRUnichar **aReturnValue);
  NS_IMETHOD SetKey(const PRUnichar* aKey);
  NS_IMETHOD SetValue(const PRUnichar* aValue);

protected:
  nsString mKey;
  nsString mValue;
};

#endif /* nsPersistentProperties_h___ */