initial support for binding keys to action chains

src/settings.h

@@ -21,6 +21,7 @@
 #ifndef _SETTINGS_H
 #define _SETTINGS_H
 
+#include <cassert>
 #include <vector>
 
 #include <mpd/client.h>
@@ -45,16 +46,41 @@ struct Column
 	bool display_empty_tag;
 };
 
+struct Bind
+{
+	typedef std::vector<Action *> ActionChain;
+	
+	Bind(ActionType at) : isThisSingle(true), itsAction(Action::Get(at)) { }
+	Bind(ActionChain *chain) : isThisSingle(false), itsChain(chain) { }
+	
+	bool isSingle() const { return isThisSingle; }
+	ActionChain *getChain() const { assert(!isThisSingle); return itsChain; }
+	Action *getAction() const { assert(isThisSingle); return itsAction; }
+	
+	private:
+		bool isThisSingle;
+		union {
+			Action *itsAction;
+			ActionChain *itsChain;
+		};
+};
+
 struct KeyConfiguration
 {
 	typedef std::pair<
-			std::multimap<Action::Key, Action *>::iterator
-		,	std::multimap<Action::Key, Action *>::iterator
+			std::multimap<Action::Key, Bind>::iterator
+		,	std::multimap<Action::Key, Bind>::iterator
 		> Binding;
 	
 	void GenerateBindings();
 	
-	std::multimap<Action::Key, Action *> Bindings;
+	std::multimap<Action::Key, Bind> Bindings;
+	
+	private:
+		template <typename T> void Bind_(wchar_t c, CharType ct, T t)
+		{
+			Bindings.insert(std::make_pair(Action::Key(c, ct), Bind(t)));
+		}
 };
 
 struct Configuration