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Sourcecode: ardour version File versions

state_manager.cc

#include <pbd/error.h>
#include <ardour/state_manager.h>

#include "i18n.h"

using namespace ARDOUR;

StateManager::StateManager ()
{
      _current_state_id = 0;
}

StateManager::~StateManager()
{
}

void
StateManager::drop_all_states ()
{
      for (StateMap::iterator i = states.begin(); i != states.end(); ++i) {
            delete *i;
      }

      states.clear ();

      save_state (_("cleared history"));
}

void
StateManager::use_state (state_id_t id)
{
      Change what_changed;
      state_id_t n;
      StateMap::iterator i;
      
      for (n = 0, i = states.begin(); n < id && i != states.end(); ++n, ++i);

      if (n != id || i == states.end()) {
            fatal << compose (_("programming error: illegal state ID (%1) passed to "
                            "StateManager::set_state() (range = 0-%3)"), id,
                          states.size()-1)
                  << endmsg;
            /*NOTREACHED*/
            return;
      }

      what_changed = restore_state (**i);
      _current_state_id = id;
      send_state_changed (what_changed);
}

void
StateManager::save_state (std::string why)
{
      states.push_back (state_factory (why));
      _current_state_id = states.size() - 1;
}

void
StateManager::send_state_changed (Change what_changed)
{
      StateChanged (what_changed);
}

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