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#ifndef nsILineBreaker_h__
#define nsILineBreaker_h__

#include "nsISupports.h"

#include "nscore.h"

#define NS_LINEBREAKER_NEED_MORE_TEXT -1

// {c3d9f25f-7cea-4a76-a08f-05c431353448}
#define NS_ILINEBREAKER_IID \
{ 0xc3d9f25f, 0x7cea, 0x4a76, \
    { 0xa0, 0x8f, 0x05, 0xc4, 0x31, 0x35, 0x34, 0x48 } }

class nsILineBreaker : public nsISupports
{
public:
  NS_DECLARE_STATIC_IID_ACCESSOR(NS_ILINEBREAKER_IID)
  virtual PRBool BreakInBetween( const PRUnichar* aText1 , PRUint32 aTextLen1,
                                 const PRUnichar* aText2 , 
                                 PRUint32 aTextLen2) = 0;

  virtual PRInt32 Next( const PRUnichar* aText, PRUint32 aLen, 
                        PRUint32 aPos) = 0;

  virtual PRInt32 Prev( const PRUnichar* aText, PRUint32 aLen, 
                        PRUint32 aPos) = 0;

  // Call this on a word with whitespace at either end. We will apply JISx4501
  // rules to find breaks inside the word. aBreakBefore is set to the break-
  // before status of each character; aBreakBefore[0] will always be false
  // because we never return a break before the first character.
  // aLength is the length of the aText array and also the length of the aBreakBefore
  // output array.
  virtual void GetJISx4051Breaks(const PRUnichar* aText, PRUint32 aLength,
                                 PRPackedBool* aBreakBefore) = 0;
};

NS_DEFINE_STATIC_IID_ACCESSOR(nsILineBreaker, NS_ILINEBREAKER_IID)

#endif  /* nsILineBreaker_h__ */