i#118925# enhance textsearch's match-group references

to work for look-ahead/look-behind
(cherry picked from commit 3b83c404)

Conflicts:
	sw/source/core/crsr/findtxt.cxx

Change-Id: Ia5b31628b0f2af8f93132afa4b2eabd2f533bb91

i18npool/source/search/textsearch.cxx

@@ -710,7 +710,7 @@ SearchResult TextSearch::RESrchFrwrd( const OUString& searchStr,
 
     // use the ICU RegexMatcher to find the matches
     UErrorCode nIcuErr = U_ZERO_ERROR;
-    const IcuUniString aSearchTargetStr( (const UChar*)searchStr.getStr(), endPos);
+    const IcuUniString aSearchTargetStr( (const UChar*)searchStr.getStr(), searchStr.getLength());
     pRegexMatcher->reset( aSearchTargetStr);
     // search until there is a valid match
     for(;;)

sw/source/core/crsr/findtxt.cxx

@@ -659,31 +659,14 @@ String *ReplaceBackReferences( const SearchOptions& rSearchOpt, SwPaM* pPam )
         if( pTxtNode && pTxtNode->IsTxtNode() && pTxtNode == pPam->GetCntntNode( sal_False ) )
         {
             utl::TextSearch aSTxt( rSearchOpt );
-            String aStr( pPam->GetTxt() );
-            String aReplaceStr( rSearchOpt.replaceString );
-            aStr = comphelper::string::remove(aStr, CH_TXTATR_BREAKWORD);
-            aStr = comphelper::string::remove(aStr, CH_TXTATR_INWORD);
-            xub_StrLen nStart = 0;
-            OUString sX( 'x' );
-            if( pPam->Start()->nContent > 0 )
-            {
-                aStr.Insert( sX, 0 );
-                ++nStart;
-            }
-            xub_StrLen nEnd = aStr.Len();
-            bool bDeleteLastX = false;
-            if (pPam->End()->nContent <
-                static_cast<const SwTxtNode*>(pTxtNode)->GetTxt().getLength())
-            {
-                aStr.Insert( sX );
-                bDeleteLastX = true;
-            }
+            const String& rStr = static_cast<const SwTxtNode*>(pTxtNode)->GetTxt();
+            xub_StrLen nStart = pPam->Start()->nContent.GetIndex();
+            xub_StrLen nEnd = pPam->End()->nContent.GetIndex();
             SearchResult aResult;
-            if( aSTxt.SearchFrwrd( aStr, &nStart, &nEnd, &aResult ) )
+            if( aSTxt.SearchFrwrd( rStr, &nStart, &nEnd, &aResult ) )
             {
-                if( bDeleteLastX )
-                    aStr.Erase( aStr.Len() - 1 );
-                aSTxt.ReplaceBackReferences( aReplaceStr, aStr, aResult );
+                String aReplaceStr( rSearchOpt.replaceString );
+                aSTxt.ReplaceBackReferences( aReplaceStr, rStr, aResult );
                 pRet = new String( aReplaceStr );
             }
         }