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connection.cc

/*
    Copyright (C) 2002 Paul Davis 

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

    $Id: connection.cc,v 1.7 2004/02/29 23:33:56 pauld Exp $
*/

#include <algorithm>

#include <pbd/failed_constructor.h>
#include <ardour/ardour.h>
#include <ardour/connection.h>
#include <pbd/xml++.h>

#include "i18n.h"

using namespace ARDOUR;
using namespace PBD;

Connection::Connection (const XMLNode& node)
{
      if (set_state (node)) {
            throw failed_constructor();
      }
}

InputConnection::InputConnection (const XMLNode& node)
      : Connection (node)
{
}

OutputConnection::OutputConnection (const XMLNode& node)
      : Connection (node)
{
}

void
Connection::set_name (string name, void *src)
{
      _name = name;
      NameChanged (src);
}

void
Connection::add_connection (int port, string portname)
{
      {
            LockMonitor lm (port_lock, __LINE__, __FILE__);
            _ports[port].push_back (portname);
      }
       ConnectionsChanged (port); /* EMIT SIGNAL */
}

void
Connection::remove_connection (int port, string portname)
{
      bool changed = false;

      {
            LockMonitor lm (port_lock, __LINE__, __FILE__);
            PortList& pl = _ports[port];
            PortList::iterator i = find (pl.begin(), pl.end(), portname);
            
            if (i != pl.end()) {
                  pl.erase (i);
                  changed = true;
            }
      }

      if (changed) {
             ConnectionsChanged (port); /* EMIT SIGNAL */
      }
}

const Connection::PortList&
Connection::port_connections (int port) const
{
      LockMonitor lm (port_lock, __LINE__, __FILE__);
      return _ports[port];
}

bool
Connection::operator== (const Connection& other) const
{
      return other._ports == _ports;
}

void
Connection::add_port ()
{
      {
            LockMonitor lm (port_lock, __LINE__, __FILE__);
            _ports.push_back (PortList());
      }
       ConfigurationChanged(); /* EMIT SIGNAL */
}

void
Connection::remove_port (int which_port)
{
      bool changed = false;

      {
            LockMonitor lm (port_lock, __LINE__, __FILE__);
            vector<PortList>::iterator i;
            int n;
            
            for (n = 0, i = _ports.begin(); i != _ports.end() && n < which_port; ++i, ++n);

            if (i != _ports.end()) {
                  _ports.erase (i);
                  changed = true;
            }
      }

      if (changed) {
             ConfigurationChanged(); /* EMIT SIGNAL */
      }
}

void 
Connection::clear ()
{
      {
            LockMonitor lm (port_lock, __LINE__, __FILE__);
            _ports.clear ();
      }

       ConfigurationChanged(); /* EMIT SIGNAL */
}

XMLNode&
Connection::get_state ()
{
      XMLNode *node;
      string str;

      if (dynamic_cast<InputConnection *> (this)) {
            node = new XMLNode ("InputConnection");
      } else {
            node = new XMLNode ("OutputConnection");
      }

      node->add_property ("name", _name);

      for (vector<PortList>::iterator i = _ports.begin(); i != _ports.end(); ++i) {

            str += '{';

            for (vector<string>::iterator ii = (*i).begin(); ii != (*i).end(); ++ii) {
                  if (ii != (*i).begin()) {
                        str += ',';
                  }
                  str += *ii;
            }
            str += '}';
      }

      node->add_property ("connections", str);

      return *node;
}

int
Connection::set_state (const XMLNode& node)
{
      const XMLProperty *prop;

      if ((prop = node.property ("name")) == 0) {
            error << _("Node for Connection has no \"name\" property") << endmsg;
            return -1;
      }

      _name = prop->value();
      _sysdep = false;
      
      if ((prop = node.property ("connections")) == 0) {
            error << _("Node for Connection has no \"connections\" property") << endmsg;
            return -1;
      }
      
      set_connections (prop->value());

      return 0;
}

int
Connection::set_connections (const string& str)
{
      vector<string> ports;
      int i;
      int n;
      int nports;
      
      if ((nports = count (str.begin(), str.end(), '{')) == 0) {
            return 0;
      }

      for (n = 0; n < nports; ++n) {
            add_port ();
      }

      string::size_type start, end, ostart;

      ostart = 0;
      start = 0;
      end = 0;
      i = 0;

      while ((start = str.find_first_of ('{', ostart)) != string::npos) {
            start += 1;

            if ((end = str.find_first_of ('}', start)) == string::npos) {
                  error << compose(_("IO: badly formed string in XML node for inputs \"%1\""), str) << endmsg;
                  return -1;
            }

            if ((n = parse_io_string (str.substr (start, end - start), ports)) < 0) {
                  error << compose(_("bad input string in XML node \"%1\""), str) << endmsg;

                  return -1;
                  
            } else if (n > 0) {

                  for (int x = 0; x < n; ++x) {
                        add_connection (i, ports[x]);
                  }
            }

            ostart = end+1;
            i++;
      }

      return 0;
}

int
Connection::parse_io_string (const string& str, vector<string>& ports)
{
      string::size_type pos, opos;

      if (str.length() == 0) {
            return 0;
      }

      pos = 0;
      opos = 0;

      ports.clear ();

      while ((pos = str.find_first_of (',', opos)) != string::npos) {
            ports.push_back (str.substr (opos, pos - opos));
            opos = pos + 1;
      }
      
      if (opos < str.length()) {
            ports.push_back (str.substr(opos));
      }

      return ports.size();
}


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