pjs/embedding/browser/powerplant/source/UMacUnicode.cpp

238 строки
6.7 KiB
C++

/* -*- Mode: C++; tab-width: 3; indent-tabs-mode: nil; c-basic-offset: 2 -*-
*
* The contents of this file are subject to the Mozilla 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/MPL/
*
* 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 the Mozilla browser.
*
* The Initial Developer of the Original Code is Netscape
* Communications, Inc. Portions created by Netscape are
* Copyright (C) 1999, Mozilla. All Rights Reserved.
*
* Contributor(s):
* Conrad Carlen <ccarlen@netscape.com>
*/
#include "UMacUnicode.h"
#include "nsString.h"
#include "nsIUnicodeEncoder.h"
#include "nsIUnicodeDecoder.h"
#include "nsIServiceManager.h"
#include "nsICharsetConverterManager.h"
CPlatformUCSConversion *CPlatformUCSConversion::mgInstance = nsnull;
CPlatformUCSConversion::CPlatformUCSConversion() :
mCharsetSel(kPlatformCharsetSel_FileName)
{
mEncoder = nsnull;
mDecoder = nsnull;
}
CPlatformUCSConversion*
CPlatformUCSConversion::GetInstance()
{
if (!mgInstance)
mgInstance = new CPlatformUCSConversion;
return mgInstance;
}
NS_IMETHODIMP
CPlatformUCSConversion::SetCharsetSelector(nsPlatformCharsetSel aSel)
{
if (mCharsetSel != aSel) {
mCharsetSel = aSel;
mPlatformCharset.Truncate(0);
mEncoder = nsnull;
mDecoder = nsnull;
}
return NS_OK;
}
NS_IMETHODIMP
CPlatformUCSConversion::PreparePlatformCharset()
{
nsresult res = NS_OK;
if (mPlatformCharset.Length() == 0)
{
nsCOMPtr<nsIPlatformCharset> pcharset =
do_GetService(NS_PLATFORMCHARSET_CONTRACTID, &res);
if (!(NS_SUCCEEDED(res) && pcharset)) {
NS_WARNING("cannot get platform charset");
}
if(NS_SUCCEEDED(res) && pcharset) {
res = pcharset->GetCharset(mCharsetSel, mPlatformCharset);
}
}
return res;
}
NS_IMETHODIMP
CPlatformUCSConversion::PrepareEncoder()
{
nsresult res = NS_OK;
if(! mEncoder)
{
res = PreparePlatformCharset();
if(NS_SUCCEEDED(res)) {
nsCOMPtr<nsICharsetConverterManager> ucmgr =
do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
NS_ASSERTION((NS_SUCCEEDED(res) && ucmgr),
"cannot get charset converter manager ");
if(NS_SUCCEEDED(res) && ucmgr)
res = ucmgr->GetUnicodeEncoder( &mPlatformCharset, getter_AddRefs(mEncoder));
NS_ASSERTION((NS_SUCCEEDED(res) && mEncoder),
"cannot find the unicode encoder");
}
}
return res;
}
NS_IMETHODIMP
CPlatformUCSConversion::PrepareDecoder()
{
nsresult res = NS_OK;
if(! mDecoder)
{
res = PreparePlatformCharset();
if(NS_SUCCEEDED(res)) {
nsCOMPtr<nsICharsetConverterManager> ucmgr =
do_GetService(NS_CHARSETCONVERTERMANAGER_CONTRACTID, &res);
NS_ASSERTION((NS_SUCCEEDED(res) && ucmgr),
"cannot get charset converter manager ");
if(NS_SUCCEEDED(res) && ucmgr)
res = ucmgr->GetUnicodeDecoder( &mPlatformCharset, getter_AddRefs(mDecoder));
NS_ASSERTION((NS_SUCCEEDED(res) && mDecoder),
"cannot find the unicode decoder");
}
}
return res;
}
NS_IMETHODIMP
CPlatformUCSConversion::UCSToPlatform(const nsAReadableString& aIn, nsAWritableCString& aOut)
{
nsresult res;
aOut.Truncate(0);
res = PrepareEncoder();
if(NS_SUCCEEDED(res))
{
nsReadingIterator<PRUnichar> done_reading;
aIn.EndReading(done_reading);
// for each chunk of |aIn|...
PRUint32 fragmentLength = 0;
nsReadingIterator<PRUnichar> iter;
for (aIn.BeginReading(iter); iter != done_reading && NS_SUCCEEDED(res); iter.advance(PRInt32(fragmentLength)))
{
fragmentLength = PRUint32(iter.size_forward());
PRInt32 inLength = fragmentLength;
PRInt32 outLength;
res = mEncoder->GetMaxLength(iter.get(), fragmentLength, &outLength);
if (NS_SUCCEEDED(res))
{
char *outBuf = (char*)nsMemory::Alloc(outLength);
if (outBuf)
{
res = mEncoder->Convert(iter.get(), &inLength, outBuf, &outLength);
if (NS_SUCCEEDED(res))
aOut.Append(outBuf, outLength);
nsMemory::Free(outBuf);
}
else
res = NS_ERROR_OUT_OF_MEMORY;
}
}
}
return res;
}
NS_IMETHODIMP
CPlatformUCSConversion::UCSToPlatform(const nsAReadableString& aIn, Str255& aOut)
{
nsresult res;
nsCAutoString cStr;
res = UCSToPlatform(aIn, cStr);
if (NS_SUCCEEDED(res))
{
PRUint32 outLength = cStr.Length();
if (outLength > 255)
outLength = 255;
memcpy(&aOut[1], cStr.get(), outLength);
aOut[0] = outLength;
}
return res;
}
NS_IMETHODIMP
CPlatformUCSConversion::PlatformToUCS(const nsAReadableCString& aIn, nsAWritableString& aOut)
{
nsresult res;
aOut.Truncate(0);
res = PrepareDecoder();
if (NS_SUCCEEDED(res))
{
nsReadingIterator<char> done_reading;
aIn.EndReading(done_reading);
// for each chunk of |aIn|...
PRUint32 fragmentLength = 0;
nsReadingIterator<char> iter;
for (aIn.BeginReading(iter); iter != done_reading && NS_SUCCEEDED(res); iter.advance(PRInt32(fragmentLength)))
{
fragmentLength = PRUint32(iter.size_forward());
PRInt32 inLength = fragmentLength;
PRInt32 outLength;
res = mDecoder->GetMaxLength(iter.get(), inLength, &outLength);
if (NS_SUCCEEDED(res))
{
PRUnichar *outBuf = (PRUnichar*)nsMemory::Alloc(outLength * sizeof(PRUnichar));
if (outBuf)
{
res = mDecoder->Convert(iter.get(), &inLength, outBuf, &outLength);
if(NS_SUCCEEDED(res))
aOut.Append(outBuf, outLength);
nsMemory::Free(outBuf);
}
else
res = NS_ERROR_OUT_OF_MEMORY;
}
}
}
return res;
}
NS_IMETHODIMP
CPlatformUCSConversion::PlatformToUCS(const Str255& aIn, nsAWritableString& aOut)
{
char charBuf[256];
memcpy(charBuf, &aIn[1], aIn[0]);
charBuf[aIn[0]] = '\0';
return PlatformToUCS(nsDependentCString(charBuf, aIn[0]), aOut);
}