1 files changed, 108 insertions, 0 deletions
diff --git a/mailnews/mime/src/comi18n.cpp b/mailnews/mime/src/comi18n.cpp
new file mode 100644
index 000000000..7425e32ff
--- /dev/null
+++ b/mailnews/mime/src/comi18n.cpp
@@ -0,0 +1,108 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "comi18n.h"
+#include "nsIStringCharsetDetector.h"
+#include "nsMsgUtils.h"
+#include "nsICharsetConverterManager.h"
+#include "nsIMIMEHeaderParam.h"
+#include "nsServiceManagerUtils.h"
+#include "nsComponentManagerUtils.h"
+#include "nsMsgMimeCID.h"
+#include "nsIMimeConverter.h"
+
+
+////////////////////////////////////////////////////////////////////////////////
+// BEGIN PUBLIC INTERFACE
+extern "C" {
+
+
+void MIME_DecodeMimeHeader(const char *header, const char *default_charset,
+                           bool override_charset, bool eatContinuations,
+                           nsACString &result)
+{
+  nsresult rv;
+  nsCOMPtr <nsIMimeConverter> mimeConverter =
+    do_GetService(NS_MIME_CONVERTER_CONTRACTID, &rv);
+  if (NS_FAILED(rv)) {
+    result.Truncate();
+    return;
+  }
+  mimeConverter->DecodeMimeHeaderToUTF8(nsDependentCString(header),
+                                        default_charset, override_charset,
+                                        eatContinuations, result);
+}
+
+// UTF-8 utility functions.
+//detect charset soly based on aBuf. return in aCharset
+nsresult
+MIME_detect_charset(const char *aBuf, int32_t aLength, const char** aCharset)
+{
+  nsresult res = NS_ERROR_UNEXPECTED;
+  nsString detector_name;
+  *aCharset = nullptr;
+
+  NS_GetLocalizedUnicharPreferenceWithDefault(nullptr, "intl.charset.detector", EmptyString(), detector_name);
+
+  if (!detector_name.IsEmpty()) {
+    nsAutoCString detector_contractid;
+    detector_contractid.AssignLiteral(NS_STRCDETECTOR_CONTRACTID_BASE);
+    detector_contractid.Append(NS_ConvertUTF16toUTF8(detector_name));
+    nsCOMPtr<nsIStringCharsetDetector> detector = do_CreateInstance(detector_contractid.get(), &res);
+    if (NS_SUCCEEDED(res)) {
+      nsDetectionConfident oConfident;
+      res = detector->DoIt(aBuf, aLength, aCharset, oConfident);
+      if (NS_SUCCEEDED(res) && (eBestAnswer == oConfident || eSureAnswer == oConfident)) {
+        return NS_OK;
+      }
+    }
+  }
+  return res;
+}
+
+//Get unicode decoder(from inputcharset to unicode) for aInputCharset
+nsresult
+MIME_get_unicode_decoder(const char* aInputCharset, nsIUnicodeDecoder **aDecoder)
+{
+  nsresult res;
+
+  // get charset converters.
+  nsCOMPtr<nsICharsetConverterManager> ccm =
+           do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
+  if (NS_SUCCEEDED(res)) {
+
+    // create a decoder (conv to unicode), ok if failed if we do auto detection
+    if (!*aInputCharset || !PL_strcasecmp("us-ascii", aInputCharset))
+      res = ccm->GetUnicodeDecoderRaw("ISO-8859-1", aDecoder);
+    else
+      // GetUnicodeDecoderInternal in order to support UTF-7 messages
+      //
+      // XXX this means that even HTML messages in UTF-7 will be decoded
+      res = ccm->GetUnicodeDecoderInternal(aInputCharset, aDecoder);
+  }
+
+  return res;
+}
+
+//Get unicode encoder(from unicode to inputcharset) for aOutputCharset
+nsresult
+MIME_get_unicode_encoder(const char* aOutputCharset, nsIUnicodeEncoder **aEncoder)
+{
+  nsresult res;
+
+  // get charset converters.
+  nsCOMPtr<nsICharsetConverterManager> ccm =
+           do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
+  if (NS_SUCCEEDED(res) && *aOutputCharset) {
+      // create a encoder (conv from unicode)
+      res = ccm->GetUnicodeEncoder(aOutputCharset, aEncoder);
+  }
+
+  return res;
+}
+
+} /* end of extern "C" */
+// END PUBLIC INTERFACE
+