mirror of
https://github.com/rn10950/RetroZilla.git
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351 lines
9.4 KiB
C++
351 lines
9.4 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Unicode case conversion helpers.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corp..
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* Portions created by the Initial Developer are Copyright (C) 2002
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Alec Flett <alecf@netscape.com>
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#include "nsString.h"
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#include "nsUnicharUtils.h"
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#include "nsUnicharUtilCIID.h"
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#include "nsICaseConversion.h"
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#include "nsIServiceManager.h"
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#include "nsCRT.h"
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#include "nsIObserver.h"
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#include "nsIObserverService.h"
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// global cache of the case conversion service
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static nsICaseConversion *gCaseConv = nsnull;
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class nsShutdownObserver : public nsIObserver
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{
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public:
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nsShutdownObserver() { }
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virtual ~nsShutdownObserver() {}
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NS_DECL_ISUPPORTS
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NS_IMETHOD Observe(nsISupports *aSubject, const char *aTopic,
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const PRUnichar *aData)
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{
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if (nsCRT::strcmp(aTopic, NS_XPCOM_SHUTDOWN_OBSERVER_ID)==0) {
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NS_IF_RELEASE(gCaseConv);
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}
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return NS_OK;
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}
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};
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NS_IMPL_ISUPPORTS1(nsShutdownObserver, nsIObserver)
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static nsresult NS_InitCaseConversion() {
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if (gCaseConv) return NS_OK;
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nsresult rv;
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rv = CallGetService(NS_UNICHARUTIL_CONTRACTID, &gCaseConv);
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if (NS_SUCCEEDED(rv)) {
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nsCOMPtr<nsIObserverService> obs =
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do_GetService("@mozilla.org/observer-service;1", &rv);
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if (NS_SUCCEEDED(rv)) {
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nsShutdownObserver *observer = new nsShutdownObserver();
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if (observer)
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obs->AddObserver(observer, NS_XPCOM_SHUTDOWN_OBSERVER_ID, PR_FALSE);
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}
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}
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return NS_OK;
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}
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class ConvertToLowerCase
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{
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public:
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typedef PRUnichar value_type;
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ConvertToLowerCase()
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{
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NS_InitCaseConversion();
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}
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PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength)
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{
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if (gCaseConv)
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gCaseConv->ToLower(aSource, NS_CONST_CAST(PRUnichar*,aSource), aSourceLength);
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else
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NS_WARNING("No case converter: no conversion done");
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return aSourceLength;
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}
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};
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#ifdef MOZ_V1_STRING_ABI
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void
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ToLowerCase( nsAString& aString )
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{
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nsAString::iterator fromBegin, fromEnd;
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ConvertToLowerCase converter;
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copy_string(aString.BeginWriting(fromBegin), aString.EndWriting(fromEnd), converter);
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}
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#endif
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void
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ToLowerCase( nsASingleFragmentString& aString )
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{
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ConvertToLowerCase converter;
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PRUnichar* start;
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converter.write(aString.BeginWriting(start), aString.Length());
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}
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void
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ToLowerCase( nsString& aString )
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{
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ConvertToLowerCase converter;
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PRUnichar* start;
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converter.write(aString.BeginWriting(start), aString.Length());
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}
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class CopyToLowerCase
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{
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public:
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typedef PRUnichar value_type;
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CopyToLowerCase( nsAString::iterator& aDestIter )
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: mIter(aDestIter)
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{
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NS_InitCaseConversion();
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}
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PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength )
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{
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PRUint32 len = PR_MIN(PRUint32(mIter.size_forward()), aSourceLength);
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PRUnichar* dest = mIter.get();
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if (gCaseConv)
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gCaseConv->ToLower(aSource, dest, len);
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else {
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NS_WARNING("No case converter: only copying");
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memcpy(dest, aSource, len * sizeof(*aSource));
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}
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mIter.advance(len);
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return len;
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}
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protected:
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nsAString::iterator& mIter;
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};
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void
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ToLowerCase( const nsAString& aSource, nsAString& aDest )
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{
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nsAString::const_iterator fromBegin, fromEnd;
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nsAString::iterator toBegin;
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// FIXME: need way to return error
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if (!EnsureStringLength(aDest, aSource.Length())) {
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aDest.Truncate();
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return; // out of memory
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}
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CopyToLowerCase converter(aDest.BeginWriting(toBegin));
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copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
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}
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class ConvertToUpperCase
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{
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public:
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typedef PRUnichar value_type;
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ConvertToUpperCase()
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{
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NS_InitCaseConversion();
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}
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PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength)
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{
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if (gCaseConv)
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gCaseConv->ToUpper(aSource, NS_CONST_CAST(PRUnichar*,aSource), aSourceLength);
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else
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NS_WARNING("No case converter: no conversion done");
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return aSourceLength;
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}
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};
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#ifdef MOZ_V1_STRING_ABI
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void
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ToUpperCase( nsAString& aString )
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{
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nsAString::iterator fromBegin, fromEnd;
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ConvertToUpperCase converter;
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copy_string(aString.BeginWriting(fromBegin), aString.EndWriting(fromEnd), converter);
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}
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#endif
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void
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ToUpperCase( nsASingleFragmentString& aString )
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{
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ConvertToUpperCase converter;
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PRUnichar* start;
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converter.write(aString.BeginWriting(start), aString.Length());
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}
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void
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ToUpperCase( nsString& aString )
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{
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ConvertToUpperCase converter;
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PRUnichar* start;
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converter.write(aString.BeginWriting(start), aString.Length());
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}
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class CopyToUpperCase
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{
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public:
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typedef PRUnichar value_type;
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CopyToUpperCase( nsAString::iterator& aDestIter )
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: mIter(aDestIter)
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{
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NS_InitCaseConversion();
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}
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PRUint32 write( const PRUnichar* aSource, PRUint32 aSourceLength )
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{
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PRUint32 len = PR_MIN(PRUint32(mIter.size_forward()), aSourceLength);
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PRUnichar* dest = mIter.get();
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if (gCaseConv)
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gCaseConv->ToUpper(aSource, dest, len);
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else {
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NS_WARNING("No case converter: only copying");
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memcpy(dest, aSource, len * sizeof(*aSource));
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}
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mIter.advance(len);
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return len;
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}
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protected:
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nsAString::iterator& mIter;
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};
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void
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ToUpperCase( const nsAString& aSource, nsAString& aDest )
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{
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nsAString::const_iterator fromBegin, fromEnd;
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nsAString::iterator toBegin;
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// FIXME: need way to return error
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if (!EnsureStringLength(aDest, aSource.Length())) {
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aDest.Truncate();
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return; // out of memory
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}
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CopyToUpperCase converter(aDest.BeginWriting(toBegin));
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copy_string(aSource.BeginReading(fromBegin), aSource.EndReading(fromEnd), converter);
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}
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int
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nsCaseInsensitiveStringComparator::operator()( const PRUnichar* lhs, const PRUnichar* rhs, PRUint32 aLength ) const
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{
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NS_InitCaseConversion();
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PRInt32 result;
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if (gCaseConv) {
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gCaseConv->CaseInsensitiveCompare(lhs, rhs, aLength, &result);
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}
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else {
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NS_WARNING("No case converter: using default");
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nsDefaultStringComparator comparator;
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result = comparator(lhs, rhs, aLength);
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}
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return result;
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}
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int
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nsCaseInsensitiveStringComparator::operator()( PRUnichar lhs, PRUnichar rhs ) const
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{
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// see if they're an exact match first
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if (lhs == rhs) return 0;
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NS_InitCaseConversion();
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if (gCaseConv) {
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gCaseConv->ToLower(lhs, &lhs);
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gCaseConv->ToLower(rhs, &rhs);
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} else {
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if (lhs < 256)
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lhs = tolower(char(lhs));
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if (rhs < 256)
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rhs = tolower(char(rhs));
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NS_WARNING("No case converter: no conversion done");
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}
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if (lhs == rhs) return 0;
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if (lhs < rhs) return -1;
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return 1;
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}
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PRUnichar
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ToLowerCase(PRUnichar aChar)
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{
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PRUnichar result;
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if (NS_FAILED(NS_InitCaseConversion()))
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return aChar;
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if (gCaseConv)
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gCaseConv->ToLower(aChar, &result);
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else {
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NS_WARNING("No case converter: no conversion done");
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if (aChar < 256)
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result = tolower(char(aChar));
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else
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result = aChar;
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}
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return result;
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}
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PRUnichar
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ToUpperCase(PRUnichar aChar)
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{
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PRUnichar result;
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if (NS_FAILED(NS_InitCaseConversion()))
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return aChar;
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if (gCaseConv)
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gCaseConv->ToUpper(aChar, &result);
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else {
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NS_WARNING("No case converter: no conversion done");
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if (aChar < 256)
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result = toupper(char(aChar));
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else
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result = aChar;
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}
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return result;
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}
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