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diff --git a/library/softFilter.h b/library/softFilter.h
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+++ b/library/softFilter.h
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+// **************************************************************************
+// * This file is part of the FreeFileSync project. It is distributed under *
+// * GNU General Public License: http://www.gnu.org/licenses/gpl.html       *
+// * Copyright (C) 2008-2010 ZenJu (zhnmju123 AT gmx.de)                    *
+// **************************************************************************
+//
+#ifndef SOFTFILTER_H_INCLUDED
+#define SOFTFILTER_H_INCLUDED
+
+#include "../fileHierarchy.h"
+#include <wx/timer.h>
+/*
+Semantics of SoftFilter:
+1. It potentially can match only one side => it MUST NOT be applied while traversing a single folder to avoid mismatches
+2. => it is applied after traversing and just marks rows, (NO deletions after comparison are allowed)
+3. => not relevant for <Automatic>-mode! ;)
+
+-> SoftFilter is equivalent to a user temporarily (de-)selecting rows
+*/
+
+namespace FreeFileSync
+{
+
+class SoftFilter
+{
+public:
+    SoftFilter(size_t timeWindow) :
+        timeWindow_(timeWindow),
+        currentTime(wxGetUTCTime()) {}
+
+    bool passFilter(const FileMapping& fileMap) const;
+    bool passFilter(const DirMapping& dirMap) const;
+
+private:
+    const size_t timeWindow_;     //point in time from "now" (in seconds) for oldest modification date to be allowed
+    const long currentTime; //number of seconds since GMT 00:00:00 Jan 1st 1970.
+};
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+//---------------Inline Implementation---------------------------------------------------
+inline
+bool SoftFilter::passFilter(const FileMapping& fileMap) const
+{
+    return (!fileMap.isEmpty<LEFT_SIDE>() &&
+            currentTime <= fileMap.getLastWriteTime<LEFT_SIDE>()  + timeWindow_) ||
+           (!fileMap.isEmpty<RIGHT_SIDE>() &&
+            currentTime <= fileMap.getLastWriteTime<RIGHT_SIDE>() + timeWindow_);
+}
+
+
+inline
+bool SoftFilter::passFilter(const DirMapping& dirMap) const
+{
+    return false;
+}
+}
+
+#endif // SOFTFILTER_H_INCLUDED