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#include <pbd/error.h>
#include <ardour/state_manager.h>
#include "i18n.h"
using namespace ARDOUR;
using namespace std;
using namespace PBD;
bool StateManager::_allow_save = true;
sigc::signal<void,const char*> StateManager::SaveAllowed;
StateManager::StateManager ()
{
_current_state_id = 0;
}
StateManager::~StateManager()
{
}
void
StateManager::prohibit_save ()
{
_allow_save = false;
}
void
StateManager::allow_save (const char* why, bool do_save)
{
_allow_save = true;
if (do_save) {
SaveAllowed (why);
SaveAllowed.slots().erase (SaveAllowed.slots().begin(), SaveAllowed.slots().end());
}
}
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 << string_compose (_("programming error: illegal state ID (%1) passed to "
"StateManager::set_state() (range = 0-%2)"), 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)
{
if (!should_save_state())
return;
if (!_allow_save) {
SaveAllowed.connect (mem_fun (*this, &StateManager::save_state));
return;
}
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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