data: showing local symbols

- added local symbols to storage
- added tests for local symbol parsing
- added MessageActivateLocalSymbols to activate local symbols in code view
- TokenLocations now store their LocationType instead of a plain bool "isScope"
- moved LocationType from TokenLocation to separate file, since it is also used in Annotations now.
- added local_symbol in stylesheet to define a style for hovering and activating these elements
- renamed location to token in stylesheet

src/lib/utility/messaging/type/MessageActivateLocalSymbols.h

@@ -0,0 +1,41 @@
+#ifndef MESSAGE_ACTIVATE_LOCAL_SYMBOLS_H
+#define MESSAGE_ACTIVATE_LOCAL_SYMBOLS_H
+
+#include "utility/messaging/Message.h"
+#include "utility/types.h"
+
+class MessageActivateLocalSymbols
+	: public Message<MessageActivateLocalSymbols>
+{
+public:
+	MessageActivateLocalSymbols()
+	{
+	}
+
+	MessageActivateLocalSymbols(const std::vector<Id>& symbolIds)
+		: symbolIds(symbolIds)
+	{
+	}
+
+	void addSymbol(Id symbolId)
+	{
+		symbolIds.push_back(symbolId);
+	}
+
+	static const std::string getStaticType()
+	{
+		return "MessageActivateLocalSymbols";
+	}
+
+	virtual void print(std::ostream& os) const
+	{
+		for (const Id& symbolId : symbolIds)
+		{
+			os << symbolId << " ";
+		}
+	}
+
+	std::vector<Id> symbolIds;
+};
+
+#endif // MESSAGE_ACTIVATE_LOCAL_SYMBOLS_H