Added simSupportsExport function

Hide E and export checked from regions without export support
No longer allow PERM_EXPORT from being added to default everyone permission flags if it's not supported by the sim.

indra/newview/lfsimfeaturehandler.h

@@ -0,0 +1,70 @@
+/* Copyright (C) 2013 Liru Færs
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General
+ * Public License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA 02110-1301 USA */
+
+#ifndef LFSIMFEATUREHANDLER_H
+#define LFSIMFEATUREHANDLER_H
+
+#include "llsingleton.h"
+
+template<typename Type>
+class SignaledType
+{
+public:
+	SignaledType(Type b) : mValue(b) {}
+
+	template<typename Slot>
+	boost::signals2::connection connect(Slot slot) { return mSignal.connect(slot); }
+
+	SignaledType& operator =(Type val)
+	{
+		if (val != mValue)
+		{
+			mValue = val;
+			mSignal();
+		}
+		return *this;
+	}
+	operator Type() const { return mValue; }
+
+private:
+	boost::signals2::signal<void()> mSignal;
+	Type mValue;
+};
+
+class LFSimFeatureHandler : public LLSingleton<LFSimFeatureHandler>
+{
+protected:
+	friend class LLSingleton<LFSimFeatureHandler>;
+	LFSimFeatureHandler();
+
+public:
+	void handleRegionChange();
+	void setSupportedFeatures();
+
+	// Connection setters
+	boost::signals2::connection setSupportsExportCallback(const boost::signals2::signal<void()>::slot_type& slot);
+
+	// Accessors
+	bool simSupportsExport() const { return mSupportsExport; }
+
+private:
+	// SignaledTypes
+	SignaledType<bool> mSupportsExport;
+};
+
+#endif //LFSIMFEATUREHANDLER_H
+