intl/unicharutil/src/nsSaveAsCharset.h
author jst@mozilla.com
Wed, 06 Feb 2008 15:06:50 -0800
changeset 11286 7a9cb183d093b27901a09e97c2661f80baef148d
parent 1 9b2a99adc05e53cd4010de512f50118594756650
child 16067 478cd55110b1fdc6021ef444f1274e8e778e8e34
permissions -rw-r--r--
Adding the memory/jemalloc directory to hg. See CVS for previous history.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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#include "nsIFactory.h"
#include "nsString.h"
#include "nsVoidArray.h"
#include "nsICharsetConverterManager.h"
#include "nsISaveAsCharset.h"


#define MASK_FALLBACK(a) (nsISaveAsCharset::mask_Fallback & (a))
#define MASK_ENTITY(a) (nsISaveAsCharset::mask_Entity & (a))
#define MASK_CHARSET_FALLBACK(a) (nsISaveAsCharset::mask_CharsetFallback & (a))
#define MASK_IGNORABLE_FALLBACK(a) (nsISaveAsCharset::mask_IgnorableFallback & (a))
#define ATTR_NO_FALLBACK(a) (nsISaveAsCharset::attr_FallbackNone == MASK_FALLBACK(a) && \
                             nsISaveAsCharset::attr_EntityAfterCharsetConv != MASK_ENTITY(a))

class nsIUnicodeEncoder;
class nsIEntityConverter;

class nsSaveAsCharset : public nsISaveAsCharset
{
public:
	
	//
	// implementation methods
	//
  nsSaveAsCharset();
  virtual ~nsSaveAsCharset();

	//
	// nsISupports
	//
	NS_DECL_ISUPPORTS

	//
	// nsIEntityConverter
	//
  NS_IMETHOD Init(const char *charset, PRUint32 attr, PRUint32 entityVersion);

  NS_IMETHOD Convert(const PRUnichar *inString, char **_retval);

  NS_IMETHODIMP GetCharset(char * *aCharset);

protected:

  NS_IMETHOD DoCharsetConversion(const PRUnichar *inString, char **outString);

  NS_IMETHOD DoConversionFallBack(PRUint32 inUCS4, char *outString, PRInt32 bufferLength);

  // do the fallback, reallocate the buffer if necessary
  // need to pass destination buffer info (size, current position and estimation of rest of the conversion)
  NS_IMETHOD HandleFallBack(PRUint32 character, char **outString, PRInt32 *bufferLength, 
                            PRInt32 *currentPos, PRInt32 estimatedLength);

  nsresult SetupUnicodeEncoder(const char* charset);

  nsresult SetupCharsetList(const char *charsetList);

  const char * GetNextCharset();

  PRUint32 mAttribute;                    // conversion attribute
  PRUint32 mEntityVersion;                // see nsIEntityConverter
  nsCOMPtr<nsIUnicodeEncoder> mEncoder;   // encoder (convert from unicode)
  nsCOMPtr<nsIEntityConverter> mEntityConverter;
  nsCStringArray mCharsetList;
  PRInt32        mCharsetListIndex;
};


nsresult NS_NewSaveAsCharset(nsISupports **inst);