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authorMarco Pesenti Gritti <mpeseng@src.gnome.org>2002-12-31 03:29:24 +0800
committerMarco Pesenti Gritti <mpeseng@src.gnome.org>2002-12-31 03:29:24 +0800
commit6876ede98282c7db318089bfefb292aa59e55d48 (patch)
tree76b23252d04da232d0ebf22e53bfe3e022686af9 /embed/mozilla/nsUnicharUtils.cpp
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Initial revision
Diffstat (limited to 'embed/mozilla/nsUnicharUtils.cpp')
-rw-r--r--embed/mozilla/nsUnicharUtils.cpp344
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diff --git a/embed/mozilla/nsUnicharUtils.cpp b/embed/mozilla/nsUnicharUtils.cpp
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+/* -*- 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;
+}
+