/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* 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 Unicode case conversion helpers.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corp..
* Portions created by the Initial Developer are Copyright (C) 2002
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Alec Flett <alecf@netscape.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 MPL, 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 MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "nsString.h"
#include "nsUnicharUtils.h"
#include "nsReadableUtils.h"
#include "nsUnicharUtilCIID.h"
#include "nsICaseConversion.h"
#include "nsIServiceManager.h"
#include "nsCRT.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
// global cache of the case conversion service
static nsICaseConversion *gCaseConv = nsnull;
class nsShutdownObserver : public nsIObserver
{
public:
nsShutdownObserver() { NS_INIT_ISUPPORTS(); }
virtual ~nsShutdownObserver() {}
NS_DECL_ISUPPORTS
NS_IMETHOD Observe(nsISupports *aSubject, const char *aTopic,
const PRUnichar *aData)
{
if (nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)==0) {
NS_IF_RELEASE(gCaseConv);
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS1(nsShutdownObserver, nsIObserver)
static nsresult NS_InitCaseConversion() {
if (gCaseConv) return NS_OK;
nsresult rv;
rv = CallGetService(NS_UNICHARUTIL_CONTRACTID, &gCaseConv);
if (NS_SUCCEEDED(rv)) {
nsCOMPtr<nsIObserverService> obs =
do_GetService("@mozilla.org/observer-service;1", &rv);
if (NS_SUCCEEDED(rv)) {
nsShutdownObserver *observer = new nsShutdownObserver();
if (observer)
obs->AddObserver(observer, NS_XPCOM_SHUTDOWN_OBSERVER_ID, PR_FALSE);
}
}
return NS_OK;
}
class ConvertToLowerCase
{
public:
typedef PRUnichar value_type;
ConvertToLowerCase()
{
NS_InitCaseConversion();
}
PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength)
{
if (gCaseConv)
gCaseConv->ToLower(aSource, NS_CONST_CAST(PRUnichar*,aSource), aSourceLength);
else
NS_WARNING("No case converter: no conversion done");
return aSourceLength;
}
};
void
ToLowerCase( nsAString& aString )
{
nsAString::iterator fromBegin, fromEnd;
ConvertToLowerCase converter;
copy_string(aString.BeginWriting(fromBegin), aString.EndWriting(fromEnd), converter);
}
void
ToLowerCase( nsASingleFragmentString& aString )
{
ConvertToLowerCase converter;
PRUnichar* start;
converter.write(aString.BeginWriting(start), aString.Length());
}
void
ToLowerCase( nsString& aString )
{
ConvertToLowerCase converter;
converter.write(aString.mUStr, aString.mLength);
}
class CopyToLowerCase
{
public:
typedef PRUnichar value_type;
CopyToLowerCase( nsAString::iterator& aDestIter )
: mIter(aDestIter)
{
NS_InitCaseConversion();
}
PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength )
{
PRUint32 len = PR_MIN(PRUint32(mIter.size_forward()), aSourceLength);
PRUnichar* dest = NS_CONST_CAST(PRUnichar*, mIter.get());
if (gCaseConv)
gCaseConv->ToLower(aSource, dest, len);
else {
NS_WARNING("No case converter: only copying");
memcpy((void*)aSource, (void*)dest, len * sizeof(*aSource));
}
mIter.advance(len);
return len;
}
protected:
nsAString::iterator& mIter;
};
void
ToLowerCase( const nsAString& aSource, nsAString& aDest )
{
nsAString::const_iterator fromBegin, fromEnd;
nsAString::iterator toBegin;
aDest.SetLength(aSource.Length());
CopyToLowerCase converter(aDest.BeginWriting(toBegin));
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
}
class ConvertToUpperCase
{
public:
typedef PRUnichar value_type;
ConvertToUpperCase()
{
NS_InitCaseConversion();
}
PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength)
{
if (gCaseConv)
gCaseConv->ToUpper(aSource, NS_CONST_CAST(PRUnichar*,aSource), aSourceLength);
else
NS_WARNING("No case converter: no conversion done");
return aSourceLength;
}
};
void
ToUpperCase( nsAString& aString )
{
nsAString::iterator fromBegin, fromEnd;
ConvertToUpperCase converter;
copy_string(aString.BeginWriting(fromBegin), aString.EndWriting(fromEnd), converter);
}
void
ToUpperCase( nsASingleFragmentString& aString )
{
ConvertToUpperCase converter;
PRUnichar* start;
converter.write(aString.BeginWriting(start), aString.Length());
}
void
ToUpperCase( nsString& aString )
{
ConvertToUpperCase converter;
converter.write(aString.mUStr, aString.mLength);
}
class CopyToUpperCase
{
public:
typedef PRUnichar value_type;
CopyToUpperCase( nsAString::iterator& aDestIter )
: mIter(aDestIter)
{
NS_InitCaseConversion();
}
PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength )
{
PRUint32 len = PR_MIN(PRUint32(mIter.size_forward()), aSourceLength);
PRUnichar* dest = NS_CONST_CAST(PRUnichar*, mIter.get());
if (gCaseConv)
gCaseConv->ToUpper(aSource, dest, len);
else {
NS_WARNING("No case converter: only copying");
memcpy((void*)aSource, (void*)dest, len * sizeof(*aSource));
}
mIter.advance(len);
return len;
}
protected:
nsAString::iterator& mIter;
};
void
ToUpperCase( const nsAString& aSource, nsAString& aDest )
{
nsAString::const_iterator fromBegin, fromEnd;
nsAString::iterator toBegin;
aDest.SetLength(aSource.Length());
CopyToUpperCase converter(aDest.BeginWriting(toBegin));
copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
}
PRBool
CaseInsensitiveFindInReadable( const nsAString& aPattern, nsAString::const_iterator& aSearchStart, nsAString::const_iterator& aSearchEnd )
{
return FindInReadable(aPattern, aSearchStart, aSearchEnd, nsCaseInsensitiveStringComparator());
}
int
nsCaseInsensitiveStringComparator::operator()( const PRUnichar* lhs, const PRUnichar* rhs, PRUint32 aLength ) const
{
NS_InitCaseConversion();
PRInt32 result;
if (gCaseConv) {
gCaseConv->CaseInsensitiveCompare(lhs, rhs, aLength, &result);
}
else {
NS_WARNING("No case converter: using default");
nsDefaultStringComparator comparator;
result = comparator(lhs, rhs, aLength);
}
return result;
}
int
nsCaseInsensitiveStringComparator::operator()( PRUnichar lhs, PRUnichar rhs ) const
{
// see if they're an exact match first
if (lhs == rhs) return 0;
NS_InitCaseConversion();
if (gCaseConv) {
gCaseConv->ToLower(lhs, &lhs);
gCaseConv->ToLower(rhs, &rhs);
} else {
if (lhs < 256)
lhs = tolower(char(lhs));
if (rhs < 256)
rhs = tolower(char(rhs));
NS_WARNING("No case converter: no conversion done");
}
if (lhs == rhs) return 0;
if (lhs < rhs) return -1;
return 1;
}
PRUnichar
ToLowerCase(PRUnichar aChar)
{
PRUnichar result;
if (NS_FAILED(NS_InitCaseConversion()))
return aChar;
if (gCaseConv)
gCaseConv->ToLower(aChar, &result);
else {
NS_WARNING("No case converter: no conversion done");
if (aChar < 256)
result = tolower(char(aChar));
else
result = aChar;
}
return result;
}
PRUnichar
ToUpperCase(PRUnichar aChar)
{
PRUnichar result;
if (NS_FAILED(NS_InitCaseConversion()))
return aChar;
if (gCaseConv)
gCaseConv->ToUpper(aChar, &result);
else {
NS_WARNING("No case converter: no conversion done");
if (aChar < 256)
result = toupper(char(aChar));
else
result = aChar;
}
return result;
}
