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pjs/mailnews/base/util/nsMsgI18N.cpp

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: NPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Netscape Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/NPL/
*
* 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.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Pierre Phaneuf <pp@ludusdesign.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the NPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the NPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
// as does this
#define NS_IMPL_IDS
#include "nsICharsetConverterManager.h"
#include "nsICharsetAlias.h"
#include "nsIPlatformCharset.h"
#undef NS_IMPL_IDS
#include "nsIServiceManager.h"
#include "nsICharsetConverterManager2.h"
#include "nsISupports.h"
#include "nsIPref.h"
#include "nsIMimeConverter.h"
#include "msgCore.h"
#include "nsMsgI18N.h"
#include "nsFileSpec.h"
#include "nsFileStream.h"
#include "nsMsgMimeCID.h"
#include "nsMimeTypes.h"
#include "nsIEntityConverter.h"
#include "nsISaveAsCharset.h"
#include "nsHankakuToZenkakuCID.h"
#include "nsXPIDLString.h"
#include "nsString.h"
#include "nsReadableUtils.h"
#include "prmem.h"
#include "nsFileSpec.h"
#include "nsUnicharUtils.h"
static NS_DEFINE_CID(kPrefCID, NS_PREF_CID);
static NS_DEFINE_CID(kCMimeConverterCID, NS_MIME_CONVERTER_CID);
static NS_DEFINE_CID(kCharsetConverterManagerCID, NS_ICHARSETCONVERTERMANAGER_CID);
static NS_DEFINE_CID(kEntityConverterCID, NS_ENTITYCONVERTER_CID);
static NS_DEFINE_CID(kSaveAsCharsetCID, NS_SAVEASCHARSET_CID);
//
// International functions necessary for composition
//
nsresult nsMsgI18NConvertFromUnicode(const nsCString& aCharset,
const nsString& inString,
nsCString& outString)
{
if (inString.IsEmpty()) {
outString.Truncate(0);
return NS_OK;
}
// Note: this will hide a possible error when the unicode text may contain more than one charset.
// (e.g. Latin1 + Japanese). Use nsMsgI18NSaveAsCharset instead to avoid that problem.
else if (aCharset.IsEmpty() ||
aCharset.EqualsIgnoreCase("us-ascii") ||
aCharset.EqualsIgnoreCase("ISO-8859-1")) {
outString.AssignWithConversion(inString);
return NS_OK;
}
else if (aCharset.EqualsIgnoreCase("UTF-8")) {
char *s = ToNewUTF8String(inString);
if (NULL == s)
return NS_ERROR_OUT_OF_MEMORY;
outString.Assign(s);
Recycle(s);
return NS_OK;
}
nsAutoString convCharset; convCharset.AssignWithConversion("ISO-8859-1");
nsresult res;
// Resolve charset alias
nsCOMPtr <nsICharsetAlias> calias = do_GetService(NS_CHARSETALIAS_CONTRACTID, &res);
if (NS_SUCCEEDED(res)) {
nsAutoString aAlias; aAlias.AssignWithConversion(aCharset.get());
if (aAlias.Length()) {
res = calias->GetPreferred(aAlias, convCharset);
}
}
nsCOMPtr <nsICharsetConverterManager> ccm = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
if(NS_SUCCEEDED(res)) {
nsCOMPtr <nsIUnicodeEncoder> encoder;
// get an unicode converter
res = ccm->GetUnicodeEncoder(&convCharset, getter_AddRefs(encoder));
if(NS_SUCCEEDED(res)) {
res = encoder->SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace, nsnull, '?');
if (NS_SUCCEEDED(res)) {
const PRUnichar *originalSrcPtr = inString.get();
PRUnichar *currentSrcPtr = NS_CONST_CAST(PRUnichar *, originalSrcPtr);
PRInt32 originalUnicharLength = inString.Length();
PRInt32 srcLength;
PRInt32 dstLength;
char localbuf[512];
PRInt32 consumedLen = 0;
outString.Assign("");
// convert
while (consumedLen < originalUnicharLength) {
srcLength = originalUnicharLength - consumedLen;
dstLength = 512;
res = encoder->Convert(currentSrcPtr, &srcLength, localbuf, &dstLength);
if (NS_FAILED(res) || dstLength == 0)
break;
outString.Append(localbuf, dstLength);
currentSrcPtr += srcLength;
consumedLen = currentSrcPtr - originalSrcPtr; // src length used so far
}
res = encoder->Finish(localbuf, &dstLength);
if (NS_SUCCEEDED(res))
outString.Append(localbuf, dstLength);
}
}
}
return res;
}
nsresult nsMsgI18NConvertToUnicode(const nsCString& aCharset,
const nsCString& inString,
nsString& outString)
{
if (inString.IsEmpty()) {
outString.Truncate();
return NS_OK;
}
else if (aCharset.IsEmpty() ||
aCharset.EqualsIgnoreCase("us-ascii") ||
aCharset.EqualsIgnoreCase("ISO-8859-1")) {
outString.AssignWithConversion(inString.get());
return NS_OK;
}
nsAutoString convCharset;
nsresult res;
// Resolve charset alias
nsCOMPtr <nsICharsetAlias> calias = do_GetService(NS_CHARSETALIAS_CONTRACTID, &res);
if (NS_SUCCEEDED(res)) {
nsAutoString aAlias; aAlias.AssignWithConversion(aCharset.get());
if (aAlias.Length()) {
res = calias->GetPreferred(aAlias, convCharset);
}
}
if (NS_FAILED(res)) {
return res;
}
nsCOMPtr <nsICharsetConverterManager> ccm = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
if(NS_SUCCEEDED(res)) {
nsCOMPtr <nsIUnicodeDecoder> decoder;
// get an unicode converter
res = ccm->GetUnicodeDecoder(&convCharset, getter_AddRefs(decoder));
if(NS_SUCCEEDED(res)) {
const char *originalSrcPtr = inString.get();
char *currentSrcPtr = NS_CONST_CAST(char *, originalSrcPtr);
PRInt32 originalLength = inString.Length();
PRInt32 srcLength;
PRInt32 dstLength;
PRUnichar localbuf[512];
PRInt32 consumedLen = 0;
outString.AssignWithConversion("");
// convert
while (consumedLen < originalLength) {
srcLength = originalLength - consumedLen;
dstLength = 512;
res = decoder->Convert(currentSrcPtr, &srcLength, localbuf, &dstLength);
if (NS_FAILED(res) || dstLength == 0)
break;
outString.Append(localbuf, dstLength);
currentSrcPtr += srcLength;
consumedLen = currentSrcPtr - originalSrcPtr; // src length used so far
}
}
}
return res;
}
// Convert an unicode string to a C string with a given charset.
nsresult ConvertFromUnicode(const char* aCharset,
const nsString& inString,
char** outCString)
{
#if 0
nsCAutoString s;
nsresult rv;
rv = nsMsgI18NConvertFromUnicode(aCharset, inString, s);
*outCString = PL_strdup(s);
return rv;
#endif
*outCString = NULL;
if (inString.IsEmpty()) {
*outCString = nsCRT::strdup("");
return (NULL == *outCString) ? NS_ERROR_OUT_OF_MEMORY : NS_OK;
}
// Note: this will hide a possible error when the unicode text may contain more than one charset.
// (e.g. Latin1 + Japanese). Use nsMsgI18NSaveAsCharset instead to avoid that problem.
else if (!*aCharset ||
!nsCRT::strcasecmp("us-ascii", aCharset) ||
!nsCRT::strcasecmp("ISO-8859-1", aCharset)) {
*outCString = ToNewCString(inString);
return *outCString ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
else if (!nsCRT::strcasecmp("UTF-8", aCharset)) {
*outCString = ToNewUTF8String(inString);
return *outCString ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
nsresult res;
nsCOMPtr <nsICharsetConverterManager2> ccm2 = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr <nsIAtom> charsetAtom;
res = ccm2->GetCharsetAtom(NS_ConvertASCIItoUCS2(aCharset).get(), getter_AddRefs(charsetAtom));
NS_ENSURE_SUCCESS(res, res);
// get an unicode converter
nsCOMPtr<nsIUnicodeEncoder> encoder;
res = ccm2->GetUnicodeEncoder(charsetAtom, getter_AddRefs(encoder));
NS_ENSURE_SUCCESS(res, res);
PRUnichar *unichars = (PRUnichar *) inString.get();
PRInt32 unicharLength = inString.Length();
PRInt32 dstLength;
res = encoder->GetMaxLength(unichars, unicharLength, &dstLength);
NS_ENSURE_SUCCESS(res, res);
res = encoder->SetOutputErrorBehavior(nsIUnicodeEncoder::kOnError_Replace, nsnull, '?');
NS_ENSURE_SUCCESS(res, res);
// allocale an output buffer
*outCString = (char *) PR_Malloc(dstLength + 1);
NS_ENSURE_TRUE(*outCString, NS_ERROR_OUT_OF_MEMORY);
PRInt32 buffLength = dstLength;
**outCString = '\0';
res = encoder->Convert(unichars, &unicharLength, *outCString, &dstLength);
if (NS_SUCCEEDED(res)) {
PRInt32 finLen = buffLength - dstLength;
res = encoder->Finish((char *)(*outCString+dstLength), &finLen);
if (NS_SUCCEEDED(res)) {
dstLength += finLen;
}
(*outCString)[dstLength] = '\0';
}
return res;
}
// Convert a C string to an unicode string.
nsresult ConvertToUnicode(const char* aCharset,
const char* inCString,
nsString& outString)
{
#if 0
nsresult rv;
rv = nsMsgI18NConvertToUnicode(aCharset, nsCAutoString(inCString), outString);
return rv;
#endif
if (NULL == inCString) {
return NS_ERROR_NULL_POINTER;
}
else if ('\0' == *inCString) {
outString.Truncate();
return NS_OK;
}
else if (!*aCharset ||
!nsCRT::strcasecmp("us-ascii", aCharset) ||
!nsCRT::strcasecmp("ISO-8859-1", aCharset)) {
outString.AssignWithConversion(inCString);
return NS_OK;
}
nsresult res;
nsCOMPtr <nsICharsetConverterManager2> ccm2 = do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
NS_ENSURE_SUCCESS(res, res);
nsCOMPtr <nsIAtom> charsetAtom;
res = ccm2->GetCharsetAtom(NS_ConvertASCIItoUCS2(aCharset).get(), getter_AddRefs(charsetAtom));
NS_ENSURE_SUCCESS(res, res);
// get an unicode converter
nsCOMPtr<nsIUnicodeDecoder> decoder;
res = ccm2->GetUnicodeDecoder(charsetAtom, getter_AddRefs(decoder));
NS_ENSURE_SUCCESS(res, res);
PRUnichar *unichars;
PRInt32 unicharLength;
PRInt32 srcLen = PL_strlen(inCString);
// buffer size 144 =
// 72 (default line len for compose)
// times 2 (converted byte len might be larger)
const int klocalbufsize = 144;
PRUnichar localbuf[klocalbufsize+1];
PRBool usedlocalbuf;
if (srcLen > klocalbufsize) {
res = decoder->GetMaxLength(inCString, srcLen, &unicharLength);
NS_ENSURE_SUCCESS(res, res);
unichars = (PRUnichar *) nsMemory::Alloc(unicharLength * sizeof(PRUnichar));
NS_ENSURE_TRUE(unichars, NS_ERROR_OUT_OF_MEMORY);
usedlocalbuf = PR_FALSE;
}
else {
unichars = localbuf;
unicharLength = klocalbufsize+1;
usedlocalbuf = PR_TRUE;
}
// convert to unicode
res = decoder->Convert(inCString, &srcLen, unichars, &unicharLength);
outString.Assign(unichars, unicharLength);
if (!usedlocalbuf)
nsMemory::Free(unichars);
return res;
}
// Charset to be used for the internatl processing.
const char *msgCompHeaderInternalCharset()
{
// UTF-8 is a super set of us-ascii.
// We can use the same string manipulation methods as us-ascii without breaking non us-ascii characters.
return "UTF-8";
}
// Charset used by the file system.
const char * nsMsgI18NFileSystemCharset()
{
/* Get a charset used for the file. */
static nsCAutoString fileSystemCharset;
if (fileSystemCharset.Length() < 1)
{
nsresult rv;
nsCOMPtr <nsIPlatformCharset> platformCharset = do_GetService(NS_PLATFORMCHARSET_CONTRACTID, &rv);
if (NS_SUCCEEDED(rv)) {
nsAutoString charset;
rv = platformCharset->GetCharset(kPlatformCharsetSel_FileName, charset);
fileSystemCharset.AssignWithConversion(charset);
}
if (NS_FAILED(rv))
fileSystemCharset.Assign("ISO-8859-1");
}
return fileSystemCharset.get();
}
// MIME encoder, output string should be freed by PR_FREE
char * nsMsgI18NEncodeMimePartIIStr(const char *header, const char *charset, PRBool bUseMime)
{
// No MIME, convert to the outgoing mail charset.
if (PR_FALSE == bUseMime) {
char *convertedStr;
if (NS_SUCCEEDED(ConvertFromUnicode(charset, NS_ConvertUTF8toUCS2(header), &convertedStr)))
return (convertedStr);
else
return PL_strdup(header);
}
char *encodedString = nsnull;
nsIMimeConverter *converter;
nsresult res = nsComponentManager::CreateInstance(kCMimeConverterCID, nsnull,
NS_GET_IID(nsIMimeConverter), (void **)&converter);
if (NS_SUCCEEDED(res) && nsnull != converter) {
res = converter->EncodeMimePartIIStr_UTF8(header, charset, kMIME_ENCODED_WORD_SIZE, &encodedString);
NS_RELEASE(converter);
}
return NS_SUCCEEDED(res) ? encodedString : nsnull;
}
// Get a default mail character set.
char * nsMsgI18NGetDefaultMailCharset()
{
nsresult res = NS_OK;
char * retVal = nsnull;
nsCOMPtr<nsIPref> prefs(do_GetService(kPrefCID, &res));
if (nsnull != prefs && NS_SUCCEEDED(res))
{
nsXPIDLString prefValue;
res = prefs->GetLocalizedUnicharPref("mailnews.send_default_charset", getter_Copies(prefValue));
if (NS_SUCCEEDED(res))
{
//TODO: map to mail charset (e.g. Shift_JIS -> ISO-2022-JP) bug#3941.
retVal = ToNewUTF8String(prefValue);
}
else
retVal = nsCRT::strdup("ISO-8859-1");
}
return (nsnull != retVal) ? retVal : nsCRT::strdup("ISO-8859-1");
}
// Return True if a charset is stateful (e.g. JIS).
PRBool nsMsgI18Nstateful_charset(const char *charset)
{
//TODO: use charset manager's service
return (nsCRT::strcasecmp(charset, "ISO-2022-JP") == 0);
}
PRBool nsMsgI18Nmultibyte_charset(const char *charset)
{
nsresult res;
nsCOMPtr <nsICharsetConverterManager2> ccm2 = do_GetService(kCharsetConverterManagerCID, &res);
PRBool result = PR_FALSE;
if (NS_SUCCEEDED(res)) {
nsCOMPtr <nsIAtom> charsetAtom;
nsAutoString charsetData;
res = ccm2->GetCharsetAtom(NS_ConvertASCIItoUCS2(charset).get(), getter_AddRefs(charsetAtom));
if (NS_SUCCEEDED(res)) {
res = ccm2->GetCharsetData2(charsetAtom, NS_LITERAL_STRING(".isMultibyte").get(), &charsetData);
if (NS_SUCCEEDED(res)) {
result = charsetData.EqualsWithConversion("true", PR_TRUE);
}
}
}
return result;
}
// Check 7bit in a given buffer.
// This is expensive (both memory and performance).
// The check would be very simple if applied to an unicode text (e.g. nsString or utf-8).
// Possible optimazaion is to search ESC(0x1B) in case of iso-2022-jp and iso-2022-kr.
// Or convert and check line by line.
PRBool nsMsgI18N7bit_data_part(const char *charset, const char *inString, const PRUint32 size)
{
nsAutoString aCharset; aCharset.AssignWithConversion(charset);
nsresult res;
PRBool result = PR_TRUE;
nsCOMPtr <nsICharsetConverterManager> ccm = do_GetService(kCharsetConverterManagerCID, &res);
if (NS_SUCCEEDED(res)) {
nsIUnicodeDecoder* decoder = nsnull;
// get an unicode converter
res = ccm->GetUnicodeDecoder(&aCharset, &decoder);
if(NS_SUCCEEDED(res)) {
char *currentSrcPtr = NS_CONST_CAST(char *, inString);
PRUint32 consumedLen = 0;
PRUnichar unicharBuff[512];
PRInt32 srcLen;
PRInt32 unicharLength;
// convert to unicode
while (consumedLen < size) {
srcLen = ((size - consumedLen) >= 512) ? 512 : (size - consumedLen); // buffer len or remaining src len
unicharLength = 512;
res = decoder->Convert(currentSrcPtr, &srcLen, unicharBuff, &unicharLength);
if (NS_FAILED(res))
break;
for (PRInt32 i = 0; i < unicharLength; i++) {
if (unicharBuff[i] > 127) {
result = PR_FALSE;
break;
}
}
currentSrcPtr += srcLen;
consumedLen = currentSrcPtr - inString; // src length used so far
}
NS_IF_RELEASE(decoder);
}
}
return result;
}
PRBool nsMsgI18Ncheck_data_in_charset_range(const char *charset, const PRUnichar* inString)
{
if (!charset || !*charset || !inString || !*inString)
return PR_TRUE;
nsAutoString aCharset; aCharset.AssignWithConversion(charset);
nsresult res;
PRBool result = PR_TRUE;
nsCOMPtr <nsICharsetConverterManager> ccm = do_GetService(kCharsetConverterManagerCID, &res);
if (NS_SUCCEEDED(res)) {
nsCOMPtr <nsIUnicodeEncoder> encoder;
// get an unicode converter
res = ccm->GetUnicodeEncoder(&aCharset, getter_AddRefs(encoder));
if(NS_SUCCEEDED(res)) {
const PRUnichar *originalPtr = inString;
PRInt32 originalLen = nsCRT::strlen(inString);
PRUnichar *currentSrcPtr = NS_CONST_CAST(PRUnichar *, originalPtr);
char localBuff[512];
PRInt32 consumedLen = 0;
PRInt32 srcLen;
PRInt32 dstLength;
// convert from unicode
while (consumedLen < originalLen) {
srcLen = originalLen - consumedLen;
dstLength = 512;
res = encoder->Convert(currentSrcPtr, &srcLen, localBuff, &dstLength);
if (NS_ERROR_UENC_NOMAPPING == res) {
result = PR_FALSE;
break;
}
else if (NS_FAILED(res) || (0 == dstLength))
break;
currentSrcPtr += srcLen;
consumedLen = currentSrcPtr - originalPtr; // src length used so far
}
}
}
return result;
}
// Simple parser to parse META charset.
// It only supports the case when the description is within one line.
const char *
nsMsgI18NParseMetaCharset(nsFileSpec* fileSpec)
{
static char charset[kMAX_CSNAME+1];
char buffer[512];
*charset = '\0';
if (fileSpec->IsDirectory()) {
NS_ASSERTION(0,"file is a directory");
return charset;
}
nsInputFileStream fileStream(*fileSpec);
while (!fileStream.eof() && !fileStream.failed() &&
fileStream.is_open()) {
fileStream.readline(buffer, 512);
if (*buffer == nsCRT::CR || *buffer == nsCRT::LF || *buffer == 0)
continue;
for (int i = 0; i < (int)PL_strlen(buffer); i++) {
buffer[i] = toupper(buffer[i]);
}
if (PL_strstr(buffer, "/HEAD"))
break;
if (PL_strstr(buffer, "META") &&
PL_strstr(buffer, "HTTP-EQUIV") &&
PL_strstr(buffer, "CONTENT-TYPE") &&
PL_strstr(buffer, "CHARSET")
)
{
char *cp = PL_strstr(PL_strstr(buffer, "CHARSET"), "=") + 1;
char seps[] = " \"\'";
char *token;
char* newStr;
token = nsCRT::strtok(cp, seps, &newStr);
if (token != NULL)
{
PL_strcpy(charset, token);
}
}
}
return charset;
}
nsresult nsMsgI18NConvertToEntity(const nsString& inString, nsString* outString)
{
nsresult res;
outString->Truncate();
nsCOMPtr <nsIEntityConverter> entityConv;
res = nsComponentManager::CreateInstance(kEntityConverterCID, NULL,
NS_GET_IID(nsIEntityConverter), getter_AddRefs(entityConv));
if(NS_SUCCEEDED(res)) {
PRUnichar *entities = NULL;
res = entityConv->ConvertToEntities(inString.get(), nsIEntityConverter::html40Latin1, &entities);
if (NS_SUCCEEDED(res) && (NULL != entities)) {
outString->Assign(entities);
nsMemory::Free(entities);
}
}
return res;
}
nsresult nsMsgI18NSaveAsCharset(const char* contentType, const char *charset, const PRUnichar* inString, char** outString)
{
NS_ASSERTION(contentType, "null ptr- contentType");
NS_ASSERTION(charset, "null ptr- charset");
NS_ASSERTION(outString, "null ptr- outString");
if(!contentType || !charset || !inString || !outString)
return NS_ERROR_NULL_POINTER;
if (0 == *inString) {
*outString = nsCRT::strdup("");
return (NULL != *outString) ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
*outString = NULL;
PRBool bTEXT_HTML = PR_FALSE;
nsresult res;
if (!nsCRT::strcasecmp(contentType, TEXT_HTML)) {
bTEXT_HTML = PR_TRUE;
}
else if (nsCRT::strcasecmp(contentType, TEXT_PLAIN)) {
return NS_ERROR_ILLEGAL_VALUE; // not supported type
}
// Resolve charset alias
nsAutoString aCharset; aCharset.AssignWithConversion(charset);
nsCOMPtr<nsICharsetAlias> calias(do_GetService(kCharsetAliasCID, &res));
if (NS_SUCCEEDED(res)) {
nsAutoString aAlias(aCharset);
if (aAlias.Length()) {
res = calias->GetPreferred(aAlias, aCharset);
}
}
if (NS_FAILED(res)) {
return res;
}
nsCOMPtr <nsISaveAsCharset> aConv; // charset converter plus entity, NCR generation
res = nsComponentManager::CreateInstance(kSaveAsCharsetCID, NULL,
NS_GET_IID(nsISaveAsCharset), getter_AddRefs(aConv));
if(NS_SUCCEEDED(res)) {
// attribute:
// html text - charset conv then fallback to entity or NCR
// plain text - charset conv then fallback to '?'
char charset_buf[kMAX_CSNAME+1];
if (bTEXT_HTML) {
// For ISO-8859-1 only, convert to entity first (always generate entites like &nbsp;).
res = aConv->Init(aCharset.ToCString(charset_buf, kMAX_CSNAME+1),
aCharset.EqualsIgnoreCase("ISO-8859-1") ?
nsISaveAsCharset::attr_htmlTextDefault :
nsISaveAsCharset::attr_EntityAfterCharsetConv + nsISaveAsCharset::attr_FallbackDecimalNCR,
nsIEntityConverter::html32);
}
else {
// fallback for text/plain: first try transliterate then '?'
res = aConv->Init(aCharset.ToCString(charset_buf, kMAX_CSNAME+1),
nsISaveAsCharset::attr_FallbackQuestionMark + nsISaveAsCharset::attr_EntityAfterCharsetConv,
nsIEntityConverter::transliterate);
}
if (NS_SUCCEEDED(res)) {
// Mapping characters in a certain range (required for Japanese only)
if (!nsCRT::strcasecmp("ISO-2022-JP", charset)) {
nsCOMPtr<nsIPref> prefs(do_GetService(kPrefCID, &res));
if (nsnull != prefs && NS_SUCCEEDED(res)) {
PRBool return_val;
if (NS_FAILED(prefs->GetBoolPref("mailnews.send_hankaku_kana", &return_val)))
return_val = PR_FALSE; // no pref means need the mapping
if (!return_val) {
nsCOMPtr <nsITextTransform> textTransform;
res = nsComponentManager::CreateInstance(NS_HANKAKUTOZENKAKU_CONTRACTID, nsnull,
NS_GET_IID(nsITextTransform), getter_AddRefs(textTransform));
if (NS_SUCCEEDED(res)) {
nsAutoString aText(inString);
nsAutoString aResult;
res = textTransform->Change(aText, aResult);
if (NS_SUCCEEDED(res)) {
return aConv->Convert(aResult.get(), outString);
}
}
}
}
}
// Convert to charset
res = aConv->Convert(inString, outString);
}
}
return res;
}
nsresult nsMsgI18NFormatNNTPXPATInNonRFC1522Format(const nsCString& aCharset,
const nsString& inString,
nsCString& outString)
{
outString.AssignWithConversion(inString);
return NS_OK;
}
char *
nsMsgI18NGetAcceptLanguage(void)
{
static char lang[32];
nsresult res;
nsCOMPtr<nsIPref> prefs(do_GetService(kPrefCID, &res));
if (nsnull != prefs && NS_SUCCEEDED(res))
{
nsXPIDLString prefValue;
nsCRT::memset(lang, 0, sizeof(lang));
res = prefs->GetLocalizedUnicharPref("intl.accept_languages", getter_Copies(prefValue));
if (NS_SUCCEEDED(res) && prefValue)
{
PL_strncpy(lang, NS_ConvertUCS2toUTF8(prefValue).get(), sizeof(lang));
}
else
PL_strcpy(lang, "en");
}
else
PL_strcpy(lang, "en");
return (char *)lang;
}
// taken from nsFileSpec::GetNativePAthString()
void
nsMsgGetNativePathString(const char *aPath, nsString& aResult)
{
if (!aPath) {
aResult.Truncate();
return;
}
ConvertToUnicode(nsMsgI18NFileSystemCharset(), aPath, aResult);
}
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