Initial revision

1 files changed, 344 insertions, 0 deletions

diff --git a/embed/mozilla/nsUnicharUtils.cpp b/embed/mozilla/nsUnicharUtils.cpp
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+++ 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;
+}
+