Backed out changeset 41bb2af34a9b

dom/src/base/nsGlobalWindow.cpp

@@ -87,6 +87,7 @@
 // Interfaces Needed
 #include "nsIWidget.h"
 #include "nsIBaseWindow.h"
+#include "nsICharsetConverterManager.h"
 #include "nsIContent.h"
 #include "nsIContentViewerEdit.h"
 #include "nsIDocShell.h"
@@ -5982,6 +5983,65 @@ nsGlobalWindow::UpdateCommands(const nsAString& anAction)
   return NS_OK;
 }
 
+nsresult
+nsGlobalWindow::ConvertCharset(const nsAString& aStr, char** aDest)
+{
+  nsresult result = NS_OK;
+  nsCOMPtr<nsIUnicodeEncoder> encoder;
+
+  nsCOMPtr<nsICharsetConverterManager>
+    ccm(do_GetService(kCharsetConverterManagerCID));
+  NS_ENSURE_TRUE(ccm, NS_ERROR_FAILURE);
+
+  // Get the document character set
+  nsCAutoString charset(NS_LITERAL_CSTRING("UTF-8")); // default to utf-8
+  if (mDoc) {
+    charset = mDoc->GetDocumentCharacterSet();
+  }
+
+  // Get an encoder for the character set
+  result = ccm->GetUnicodeEncoderRaw(charset.get(),
+                                     getter_AddRefs(encoder));
+  if (NS_FAILED(result))
+    return result;
+
+  result = encoder->Reset();
+  if (NS_FAILED(result))
+    return result;
+
+  PRInt32 maxByteLen, srcLen;
+  srcLen = aStr.Length();
+
+  const nsPromiseFlatString& flatSrc = PromiseFlatString(aStr);
+  const PRUnichar* src = flatSrc.get();
+
+  // Get the expected length of result string
+  result = encoder->GetMaxLength(src, srcLen, &maxByteLen);
+  if (NS_FAILED(result))
+    return result;
+
+  // Allocate a buffer of the maximum length
+  *aDest = (char *) nsMemory::Alloc(maxByteLen + 1);
+  PRInt32 destLen2, destLen = maxByteLen;
+  if (!*aDest)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  // Convert from unicode to the character set
+  result = encoder->Convert(src, &srcLen, *aDest, &destLen);
+  if (NS_FAILED(result)) {    
+    nsMemory::Free(*aDest);
+    *aDest = nsnull;
+    return result;
+  }
+
+  // Allow the encoder to finish the conversion
+  destLen2 = maxByteLen - destLen;
+  encoder->Finish(*aDest + destLen, &destLen2);
+  (*aDest)[destLen + destLen2] = '\0';
+
+  return result;
+}
+
 PRBool
 nsGlobalWindow::GetBlurSuppression()
 {

dom/src/base/nsGlobalWindow.h

@@ -572,6 +572,8 @@ protected:
 
   static PRBool CanMoveResizeWindows();
 
+  nsresult ConvertCharset(const nsAString& aStr, char** aDest);
+
   PRBool   GetBlurSuppression();
 
   // If aDoFlush is true, we'll flush our own layout; otherwise we'll try to