Simplify by using indexed getToken()

Change-Id: Ie3c890be9ec3ec01bb72977ab2934bda62b2edea
Reviewed-on: https://gerrit.libreoffice.org/69248
Tested-by: Jenkins
Reviewed-by: Matteo Casalin <matteo.casalin@yahoo.com>

filter/source/config/cache/querytokenizer.cxx

@@ -35,22 +35,14 @@ QueryTokenizer::QueryTokenizer(const OUString& sQuery)
         OUString sToken = sQuery.getToken(0, ':', token);
         if (!sToken.isEmpty())
         {
-            sal_Int32 equal = sToken.indexOf('=');
+            sal_Int32 nIdx{ 0 };
+            const OUString sKey{ sToken.getToken(0, '=', nIdx) };
+            const OUString sVal{ sToken.getToken(0, ':', nIdx) };
 
-            if (equal == 0)
+            if (sKey.isEmpty())
                 m_bValid = false;
             OSL_ENSURE(m_bValid, "QueryTokenizer::QueryTokenizer() Found non boolean query parameter ... but its key is empty. Will be ignored!");
 
-            OUString sKey;
-            OUString sVal;
-
-            sKey = sToken;
-            if (equal > 0)
-            {
-                sKey = sToken.copy(0      , equal                       );
-                sVal = sToken.copy(equal+1);
-            }
-
             if (find(sKey) != end())
                 m_bValid = false;
             OSL_ENSURE(m_bValid, "QueryTokenizer::QueryTokenizer() Query contains same param more than once. Last one wins :-)");