Framework for loading sequences from files

[libs/demoscene.git] / source / sequencer.h

diff --git a/source/sequencer.h b/source/sequencer.h
index e6eb2b7849381a4f4ad2f4a6196c71610040d186..387cdde3cfbc0118047f045c37b5b8de3a198e3d 100644 (file)
--- a/source/sequencer.h
+++ b/source/sequencer.h
@@ -3,14 +3,72 @@
 
 #include <vector>
 #include <sigc++/signal.h>
+#include <msp/core/maputils.h>
+#include <msp/core/refptr.h>
+#include <msp/datafile/objectloader.h>
 #include <msp/time/timedelta.h>
 #include <msp/time/timestamp.h>
+#include "action.h"
 
-class Action;
+class Demo;
 
 class Sequencer
 {
+public:
+       class Loader: public Msp::DataFile::ObjectLoader<Sequencer>
+       {
+       private:
+               Demo &demo;
+
+       public:
+               Loader(Sequencer &, Demo &);
+
+       private:
+               void define_action(const std::string &);
+               void instant(float);
+               void segment(float, float);
+       };
+
 private:
+       class ActionDefLoader;
+
+       class RegisteredAction
+       {
+       public:
+               typedef void (ActionDefLoader::*LoaderFunc)();
+
+               virtual ~RegisteredAction() { }
+               virtual LoaderFunc get_loader_func() const = 0;
+       };
+
+       template<typename T>
+       class RegisteredActionType: public RegisteredAction
+       {
+       public:
+               virtual LoaderFunc get_loader_func() const;
+       };
+
+       class ActionDefLoader: public Msp::DataFile::ObjectLoader<Sequencer>
+       {
+       private:
+               Demo &demo;
+               Msp::RefPtr<Action> action;
+
+       public:
+               ActionDefLoader(Sequencer &, Demo &);
+
+               Action *get_action() { return action.release(); }
+
+       private:
+               virtual void finished();
+
+               template<typename T>
+               void action_def();
+
+               template<typename T>
+               friend class RegisteredActionType;
+       };
+
        struct Segment
        {
                Action *action;
@@ -18,10 +76,26 @@ private:
                float end_beat;
        };
 
+       class SegmentLoader: public Msp::DataFile::ObjectLoader<Sequencer>
+       {
+       private:
+               float start_beat;
+               float end_beat;
+
+       public:
+               SegmentLoader(Sequencer &, float, float);
+
+       private:
+               void apply(const std::string &);
+       };
+
 public:
        sigc::signal<void> signal_finished;
 
 private:
+       std::map<std::string, RegisteredAction *> action_types;
+       std::map<std::string, Action *> named_actions;
+
        Msp::Time::TimeDelta secs_per_beat;
        std::vector<Action *> static_actions;
        std::vector<Segment> segments;
@@ -34,6 +108,9 @@ private:
 public:
        Sequencer(float = 120.0f);
 
+       template<typename T>
+       void register_action_type(const std::string &);
+
        void set_beats_per_minute(float);
        float get_beats_per_minute() const { return Msp::Time::min/secs_per_beat; }
        void add_static_action(Action &);
@@ -49,4 +126,30 @@ public:
        float get_current_beat() const { return beat; }
 };
 
+template<typename T>
+inline void Sequencer::register_action_type(const std::string &n)
+{
+       if(action_types.count(n))
+               throw Msp::key_error(n);
+
+       action_types[n] = new RegisteredActionType<T>;
+}
+
+template<typename T>
+Sequencer::RegisteredAction::LoaderFunc Sequencer::RegisteredActionType<T>::get_loader_func() const
+{
+       return &ActionDefLoader::action_def<T>;
+}
+
+template<typename T>
+void Sequencer::ActionDefLoader::action_def()
+{
+       if(action)
+               throw std::runtime_error("Only one action per definition is allowed");
+
+       Msp::RefPtr<T> act = new T;
+       load_sub(*act, demo);
+       action = act;
+}
+
 #endif