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lightning-sunbird  0.9+nobinonly
Public Member Functions | Private Attributes
nsCharsetAlias2 Class Reference

#include <nsCharsetAlias.h>

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List of all members.

Public Member Functions

 nsCharsetAlias2 ()
virtual ~nsCharsetAlias2 ()
NS_IMETHOD GetPreferred (const nsACString &aAlias, nsACString &aResult)
NS_IMETHOD Equals (const nsACString &aCharset1, const nsACString &aCharset2, PRBool *oResult)

Private Attributes

nsGREResPropertiesmDelegate

Detailed Description

Definition at line 44 of file nsCharsetAlias.h.


Constructor & Destructor Documentation

Definition at line 56 of file nsCharsetAliasImp.cpp.

{
  mDelegate = nsnull; // delay the load of mDelegate untill we need it.
}

Definition at line 61 of file nsCharsetAliasImp.cpp.

{
  if(mDelegate)
     delete mDelegate;
}

Member Function Documentation

NS_IMETHODIMP nsCharsetAlias2::Equals ( const nsACString &  aCharset1,
const nsACString &  aCharset2,
PRBool oResult 
) [virtual]

Implements nsICharsetAlias.

Definition at line 122 of file nsCharsetAliasImp.cpp.

{
   nsresult res = NS_OK;

   if(aCharset1.Equals(aCharset2, nsCaseInsensitiveCStringComparator())) {
      *oResult = PR_TRUE;
      return res;
   }

   if(aCharset1.IsEmpty() || aCharset2.IsEmpty()) {
      *oResult = PR_FALSE;
      return res;
   }

   *oResult = PR_FALSE;
   nsCAutoString name1;
   nsCAutoString name2;
   res = this->GetPreferred(aCharset1, name1);
   if(NS_SUCCEEDED(res)) {
      res = this->GetPreferred(aCharset2, name2);
      if(NS_SUCCEEDED(res)) {
        *oResult = name1.Equals(name2, nsCaseInsensitiveCStringComparator());
      }
   }
   
   return res;
}

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NS_IMETHODIMP nsCharsetAlias2::GetPreferred ( const nsACString &  aAlias,
nsACString &  aResult 
) [virtual]

Implements nsICharsetAlias.

Definition at line 67 of file nsCharsetAliasImp.cpp.

{
   if (aAlias.IsEmpty()) return NS_ERROR_NULL_POINTER;
   NS_TIMELINE_START_TIMER("nsCharsetAlias2:GetPreferred");

   nsCAutoString aKey(aAlias);
   ToLowerCase(aKey);
   oResult.Truncate();

   // Delay loading charsetalias.properties by hardcoding the most
   // frequent aliases.  Note that it's possible to recur in to this
   // function *while loading* charsetalias.properties (see bug 190951),
   // so we might have an |mDelegate| already that isn't valid yet, but
   // the load is guaranteed to be "UTF-8" so things will be OK.
   if(aKey.EqualsLiteral("utf-8")) {
     oResult.AssignLiteral("UTF-8");
     NS_TIMELINE_STOP_TIMER("nsCharsetAlias2:GetPreferred");
     return NS_OK;
   } 
   if(aKey.EqualsLiteral("iso-8859-1")) {
     oResult.AssignLiteral("ISO-8859-1");
     NS_TIMELINE_STOP_TIMER("nsCharsetAlias2:GetPreferred");
     return NS_OK;
   } 
   if(aKey.EqualsLiteral("x-sjis") ||
      aKey.EqualsLiteral("shift_jis")) {
     oResult.AssignLiteral("Shift_JIS");
     NS_TIMELINE_STOP_TIMER("nsCharsetAlias2:GetPreferred");
     return NS_OK;
   } 

   if(!mDelegate) {
     //load charsetalias.properties string bundle with all remaining aliases
     // we may need to protect the following section with a lock so we won't call the 
     // 'new nsGREResProperties' from two different threads
     mDelegate = new nsGREResProperties( NS_LITERAL_CSTRING("charsetalias.properties") );
     NS_ASSERTION(mDelegate, "cannot create nsGREResProperties");
     if(nsnull == mDelegate)
       return NS_ERROR_OUT_OF_MEMORY;
   }

   NS_TIMELINE_STOP_TIMER("nsCharsetAlias2:GetPreferred");
   NS_TIMELINE_MARK_TIMER("nsCharsetAlias2:GetPreferred");

   // hack for now, have to fix nsGREResProperties, but we can't until
   // string bundles use UTF8 keys
   nsAutoString result;
   nsresult rv = mDelegate->Get(NS_ConvertASCIItoUCS2(aKey), result);
   LossyAppendUTF16toASCII(result, oResult);
   return rv;
}

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Member Data Documentation

Definition at line 58 of file nsCharsetAlias.h.


The documentation for this class was generated from the following files: