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ardour_ui.cc

/*
    Copyright (C) 1999-2007 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.

*/

#include <algorithm>
#include <cmath>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <cerrno>
#include <fstream>

#include <iostream>

#include <sys/resource.h>

#include <gtkmm/messagedialog.h>
#include <gtkmm/accelmap.h>

#include <pbd/error.h>
#include <pbd/compose.h>
#include <pbd/pathscanner.h>
#include <pbd/failed_constructor.h>
#include <pbd/enumwriter.h>
#include <pbd/stacktrace.h>
#include <gtkmm2ext/gtk_ui.h>
#include <gtkmm2ext/utils.h>
#include <gtkmm2ext/click_box.h>
#include <gtkmm2ext/fastmeter.h>
#include <gtkmm2ext/stop_signal.h>
#include <gtkmm2ext/popup.h>
#include <gtkmm2ext/window_title.h>

#include <midi++/port.h>
#include <midi++/mmc.h>

#include <ardour/ardour.h>
#include <ardour/profile.h>
#include <ardour/session_route.h>
#include <ardour/port.h>
#include <ardour/audioengine.h>
#include <ardour/playlist.h>
#include <ardour/utils.h>
#include <ardour/audio_diskstream.h>
#include <ardour/audiofilesource.h>
#include <ardour/recent_sessions.h>
#include <ardour/port.h>
#include <ardour/audio_track.h>

#include "actions.h"
#include "ardour_ui.h"
#include "public_editor.h"
#include "audio_clock.h"
#include "keyboard.h"
#include "mixer_ui.h"
#include "prompter.h"
#include "opts.h"
#include "add_route_dialog.h"
#include "new_session_dialog.h"
#include "about.h"
#include "utils.h"
#include "gui_thread.h"
#include "theme_manager.h"
#include "engine_dialog.h"

#include "i18n.h"

using namespace ARDOUR;
using namespace PBD;
using namespace Gtkmm2ext;
using namespace Gtk;
using namespace sigc;

ARDOUR_UI *ARDOUR_UI::theArdourUI = 0;
UIConfiguration *ARDOUR_UI::ui_config = 0;

sigc::signal<void,bool> ARDOUR_UI::Blink;
sigc::signal<void>      ARDOUR_UI::RapidScreenUpdate;
sigc::signal<void>      ARDOUR_UI::SuperRapidScreenUpdate;
sigc::signal<void,nframes_t, bool, nframes_t> ARDOUR_UI::Clock;

ARDOUR_UI::ARDOUR_UI (int *argcp, char **argvp[])

      : Gtkmm2ext::UI (X_("Ardour"), argcp, argvp),
        
        primary_clock (X_("primary"), false, X_("TransportClockDisplay"), true, false, true),
        secondary_clock (X_("secondary"), false, X_("SecondaryClockDisplay"), true, false, true),
        preroll_clock (X_("preroll"), false, X_("PreRollClock"), true, true),
        postroll_clock (X_("postroll"), false, X_("PostRollClock"), true, true),

        /* adjuster table */

        adjuster_table (3, 3),

        /* preroll stuff */

        preroll_button (_("pre\nroll")),
        postroll_button (_("post\nroll")),

        /* big clock */

        big_clock (X_("bigclock"), false, "BigClockNonRecording", false, false, true),

        /* transport */

        roll_controllable ("transport roll", *this, TransportControllable::Roll),
        stop_controllable ("transport stop", *this, TransportControllable::Stop),
        goto_start_controllable ("transport goto start", *this, TransportControllable::GotoStart),
        goto_end_controllable ("transport goto end", *this, TransportControllable::GotoEnd),
        auto_loop_controllable ("transport auto loop", *this, TransportControllable::AutoLoop),
        play_selection_controllable ("transport play selection", *this, TransportControllable::PlaySelection),
        rec_controllable ("transport rec-enable", *this, TransportControllable::RecordEnable),
        shuttle_controllable ("shuttle", *this, TransportControllable::ShuttleControl),
        shuttle_controller_binding_proxy (shuttle_controllable),

        roll_button (roll_controllable),
        stop_button (stop_controllable),
        goto_start_button (goto_start_controllable),
        goto_end_button (goto_end_controllable),
        auto_loop_button (auto_loop_controllable),
        play_selection_button (play_selection_controllable),
        rec_button (rec_controllable),
        
        shuttle_units_button (_("% ")),

        punch_in_button (_("Punch In")),
        punch_out_button (_("Punch Out")),
        auto_return_button (_("Auto Return")),
        auto_play_button (_("Auto Play")),
        auto_input_button (_("Auto Input")),
        click_button (_("Click")),
        time_master_button (_("time\nmaster")),

        auditioning_alert_button (_("AUDITION")),
        solo_alert_button (_("SOLO")),
        shown_flag (false)
{
      using namespace Gtk::Menu_Helpers;

      Gtkmm2ext::init();
      
      about = 0;

      if (theArdourUI == 0) {
            theArdourUI = this;
      }

      ui_config = new UIConfiguration();
      theme_manager = new ThemeManager();

      editor = 0;
      mixer = 0;
      session = 0;
      _session_is_new = false;
      big_clock_window = 0;
      session_selector_window = 0;
      last_key_press_time = 0;
      connection_editor = 0;
      add_route_dialog = 0;
      route_params = 0;
      option_editor = 0;
      location_ui = 0;
      open_session_selector = 0;
      have_configure_timeout = false;
      have_disk_speed_dialog_displayed = false;
      _will_create_new_session_automatically = false;
      session_loaded = false;
      last_speed_displayed = -1.0f;

      keybindings_path = ARDOUR::find_config_file ("ardour.bindings");
      /* all changes go to the user directory */
      user_keybindings_path = get_user_ardour_path ();
      user_keybindings_path += '/';
      user_keybindings_path += "ardour.bindings";

      can_save_keybindings = false;

      last_configure_time.tv_sec = 0;
      last_configure_time.tv_usec = 0;

      shuttle_grabbed = false;
      shuttle_fract = 0.0;
      shuttle_max_speed = 8.0f;

      shuttle_style_menu = 0;
      shuttle_unit_menu = 0;

      gettimeofday (&last_peak_grab, 0);
      gettimeofday (&last_shuttle_request, 0);

      ARDOUR::Diskstream::DiskOverrun.connect (mem_fun(*this, &ARDOUR_UI::disk_overrun_handler));
      ARDOUR::Diskstream::DiskUnderrun.connect (mem_fun(*this, &ARDOUR_UI::disk_underrun_handler));

      /* handle pending state with a dialog */

      ARDOUR::Session::AskAboutPendingState.connect (mem_fun(*this, &ARDOUR_UI::pending_state_dialog));

      /* have to wait for AudioEngine and Configuration before proceeding */
}

void
ARDOUR_UI::set_engine (AudioEngine& e)
{
      engine = &e;

      engine->Stopped.connect (mem_fun(*this, &ARDOUR_UI::engine_stopped));
      engine->Running.connect (mem_fun(*this, &ARDOUR_UI::engine_running));
      engine->Halted.connect (mem_fun(*this, &ARDOUR_UI::engine_halted));
      engine->SampleRateChanged.connect (mem_fun(*this, &ARDOUR_UI::update_sample_rate));

            ActionManager::init ();
      new_session_dialog = new NewSessionDialog();

      _tooltips.enable();

      keyboard = new Keyboard;

      if (setup_windows ()) {
            throw failed_constructor ();
      }

      if (GTK_ARDOUR::show_key_actions) {
            vector<string> names;
            vector<string> paths;
            vector<string> keys;
            vector<AccelKey> bindings;

            ActionManager::get_all_actions (names, paths, keys, bindings);

            vector<string>::iterator n;
            vector<string>::iterator k;
            for (n = names.begin(), k = keys.begin(); n != names.end(); ++n, ++k) {
                  cerr << "Action: " << (*n) << " bound to " << (*k) << endl;
            }

            exit (0);
      }

      /* start with timecode, metering enabled
      */
      
      blink_timeout_tag = -1;

      /* the global configuration object is now valid */

      use_config ();

      /* this being a GUI and all, we want peakfiles */

      AudioFileSource::set_build_peakfiles (true);
      AudioFileSource::set_build_missing_peakfiles (true);

      /* set default clock modes */

      primary_clock.set_mode (AudioClock::SMPTE);
      secondary_clock.set_mode (AudioClock::BBT);

      /* start the time-of-day-clock */
      
      update_wall_clock ();
      Glib::signal_timeout().connect (mem_fun(*this, &ARDOUR_UI::update_wall_clock), 60000);

      update_disk_space ();
      update_cpu_load ();
      update_sample_rate (engine->frame_rate());

      starting.connect (mem_fun(*this, &ARDOUR_UI::startup));
      stopping.connect (mem_fun(*this, &ARDOUR_UI::shutdown));
}

ARDOUR_UI::~ARDOUR_UI ()
{
      save_ardour_state ();

      if (keyboard) {
            delete keyboard;
      }

      if (editor) {
            delete editor;
      }

      if (mixer) {
            delete mixer;
      }

      if (add_route_dialog) {
            delete add_route_dialog;
      }
}

gint
ARDOUR_UI::configure_timeout ()
{
      struct timeval now;
      struct timeval diff;

      if (last_configure_time.tv_sec == 0 && last_configure_time.tv_usec == 0) {
            /* no configure events yet */
            return TRUE;
      }

      gettimeofday (&now, 0);
      timersub (&now, &last_configure_time, &diff);

      /* force a gap of 0.5 seconds since the last configure event
       */

      if (diff.tv_sec == 0 && diff.tv_usec < 500000) {
            return TRUE;
      } else {
            have_configure_timeout = false;
            save_ardour_state ();
            return FALSE;
      }
}

gboolean
ARDOUR_UI::configure_handler (GdkEventConfigure* conf)
{
      if (have_configure_timeout) {
            gettimeofday (&last_configure_time, 0);
      } else {
            Glib::signal_timeout().connect (mem_fun(*this, &ARDOUR_UI::configure_timeout), 100);
            have_configure_timeout = true;
      }
            
      return FALSE;
}

void
ARDOUR_UI::set_transport_controllable_state (const XMLNode& node)
{
      const XMLProperty* prop;

      if ((prop = node.property ("roll")) != 0) {
            roll_controllable.set_id (prop->value());
      }
      if ((prop = node.property ("stop")) != 0) {
            stop_controllable.set_id (prop->value());
      }
      if ((prop = node.property ("goto_start")) != 0) {
            goto_start_controllable.set_id (prop->value());
      }
      if ((prop = node.property ("goto_end")) != 0) {
            goto_end_controllable.set_id (prop->value());
      }
      if ((prop = node.property ("auto_loop")) != 0) {
            auto_loop_controllable.set_id (prop->value());
      }
      if ((prop = node.property ("play_selection")) != 0) {
            play_selection_controllable.set_id (prop->value());
      }
      if ((prop = node.property ("rec")) != 0) {
            rec_controllable.set_id (prop->value());
      }
      if ((prop = node.property ("shuttle")) != 0) {
            shuttle_controllable.set_id (prop->value());
      }
}

XMLNode&
ARDOUR_UI::get_transport_controllable_state ()
{
      XMLNode* node = new XMLNode(X_("TransportControllables"));
      char buf[64];

      roll_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("roll"), buf);
      stop_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("stop"), buf);
      goto_start_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("goto_start"), buf);
      goto_end_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("goto_end"), buf);
      auto_loop_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("auto_loop"), buf);
      play_selection_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("play_selection"), buf);
      rec_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("rec"), buf);
      shuttle_controllable.id().print (buf, sizeof (buf));
      node->add_property (X_("shuttle"), buf);

      return *node;
}

void
ARDOUR_UI::save_ardour_state ()
{
      if (!keyboard || !mixer || !editor) {
            return;
      }
      
      /* XXX this is all a bit dubious. add_extra_xml() uses
         a different lifetime model from add_instant_xml().
      */

      XMLNode* node = new XMLNode (keyboard->get_state());
      Config->add_extra_xml (*node);
      Config->add_extra_xml (get_transport_controllable_state());
      Config->save_state();

      XMLNode enode(static_cast<Stateful*>(editor)->get_state());
      XMLNode mnode(mixer->get_state());

      if (session) {
            session->add_instant_xml (enode, session->path());
            session->add_instant_xml (mnode, session->path());
      } else {
            Config->add_instant_xml (enode, get_user_ardour_path());
            Config->add_instant_xml (mnode, get_user_ardour_path());
      }

      save_keybindings ();
}

gint
ARDOUR_UI::autosave_session ()
{
        if (!Config->get_periodic_safety_backups())
                return 1;
        
        if (session) {
                session->maybe_write_autosave();
        }

        return 1;
}

void
ARDOUR_UI::update_autosave ()
{
        ENSURE_GUI_THREAD (mem_fun (*this, &ARDOUR_UI::update_autosave));
        
        if (session->dirty()) {
                if (_autosave_connection.connected()) {
                        _autosave_connection.disconnect();
                }

                _autosave_connection = Glib::signal_timeout().connect (mem_fun (*this, &ARDOUR_UI::autosave_session),
                                                    Config->get_periodic_safety_backup_interval() * 1000);

        } else {
                if (_autosave_connection.connected()) {
                        _autosave_connection.disconnect();
                }               
        }
}

void
ARDOUR_UI::startup ()
{
      check_memory_locking();
}

void
ARDOUR_UI::no_memory_warning ()
{
      XMLNode node (X_("no-memory-warning"));
      Config->add_instant_xml (node, get_user_ardour_path());
}

void
ARDOUR_UI::check_memory_locking ()
{
#ifdef __APPLE__
      /* OS X doesn't support mlockall(2), and so testing for memory locking capability there is pointless */
      return;
#else // !__APPLE__

      XMLNode* memory_warning_node = Config->instant_xml (X_("no-memory-warning"), get_user_ardour_path());

      if (engine->is_realtime() && memory_warning_node == 0) {

            struct rlimit limits;
            int64_t ram;
            long pages, page_size;

            if ((page_size = sysconf (_SC_PAGESIZE)) < 0 ||(pages = sysconf (_SC_PHYS_PAGES)) < 0) {
                  ram = 0;
            } else {
                  ram = (int64_t) pages * (int64_t) page_size;
            }

            if (getrlimit (RLIMIT_MEMLOCK, &limits)) {
                  return;
            }
            
            if (limits.rlim_cur != RLIM_INFINITY) {

                  if (ram == 0 || ((double) limits.rlim_cur / ram) < 0.75) {
                  

                        MessageDialog msg (_("WARNING: Your system has a limit for maximum amount of locked memory. "
                                         "This might cause Ardour to run out of memory before your system "
                                         "runs out of memory. \n\n"
                                         "You can view the memory limit with 'ulimit -l', "
                                         "and it is normally controlled by /etc/security/limits.conf"));
                        
                        VBox* vbox = msg.get_vbox();
                        HBox hbox;
                        CheckButton cb (_("Do not show this window again"));
                        
                        cb.signal_toggled().connect (mem_fun (*this, &ARDOUR_UI::no_memory_warning));
                        
                        hbox.pack_start (cb, true, false);
                        vbox->pack_start (hbox);
                        hbox.show_all ();
                        
                        editor->ensure_float (msg);
                        msg.run ();
                  }
            }
      }
#endif // !__APPLE__
}


void
ARDOUR_UI::finish()
{
      if (session && session->dirty()) {
            switch (ask_about_saving_session(_("quit"))) {
            case -1:
                  return;
                  break;
            case 1:
                  /* use the default name */
                  if (save_state_canfail ("")) {
                        /* failed - don't quit */
                        MessageDialog msg (*editor, 
                                     _("\
Ardour was unable to save your session.\n\n\
If you still wish to quit, please use the\n\n\
\"Just quit\" option."));
                        msg.run ();
                        return;
                  }
                  break;
            case 0:
                  break;
            }
      }

      if (session) {
            session->set_deletion_in_progress ();
      }
      engine->stop (true);
      Config->save_state();
      ARDOUR_UI::config()->save_state();
      quit ();
}

int
ARDOUR_UI::ask_about_saving_session (const string & what)
{
      ArdourDialog window (_("ardour: save session?"));
      Gtk::HBox dhbox;  // the hbox for the image and text
      Gtk::Label  prompt_label;
      Gtk::Image* dimage = manage (new Gtk::Image(Stock::DIALOG_WARNING,  Gtk::ICON_SIZE_DIALOG));

      string msg;

      msg = string_compose(_("Don't %1"), what);
      window.add_button (msg, RESPONSE_REJECT);
      msg = string_compose(_("Just %1"), what);
      window.add_button (msg, RESPONSE_APPLY);
      msg = string_compose(_("Save and %1"), what);
      window.add_button (msg, RESPONSE_ACCEPT);

      window.set_default_response (RESPONSE_ACCEPT);

      Gtk::Button noquit_button (msg);
      noquit_button.set_name ("EditorGTKButton");

      string prompt;
      string type;

      if (session->snap_name() == session->name()) {
            type = _("session");
      } else {
            type = _("snapshot");
      }
      prompt = string_compose(_("The %1\"%2\"\nhas not been saved.\n\nAny changes made this time\nwill be lost unless you save it.\n\nWhat do you want to do?"), 
                   type, session->snap_name());
      
      prompt_label.set_text (prompt);
      prompt_label.set_name (X_("PrompterLabel"));
      prompt_label.set_alignment(ALIGN_LEFT, ALIGN_TOP);

      dimage->set_alignment(ALIGN_CENTER, ALIGN_TOP)
;
      dhbox.set_homogeneous (false);
      dhbox.pack_start (*dimage, false, false, 5);
      dhbox.pack_start (prompt_label, true, false, 5);
      window.get_vbox()->pack_start (dhbox);

      window.set_name (_("Prompter"));
      window.set_position (Gtk::WIN_POS_MOUSE);
      window.set_modal (true);
      window.set_resizable (false);
      window.show_all ();

      save_the_session = 0;

      window.set_keep_above (true);
      window.present ();

      ResponseType r = (ResponseType) window.run();

      window.hide ();

      switch (r) {
      case RESPONSE_ACCEPT: // save and get out of here
            return 1;
      case RESPONSE_APPLY:  // get out of here
            return 0;
      default:
            break;
      }

      return -1;
}
      
gint
ARDOUR_UI::every_second ()
{
      update_cpu_load ();
      update_buffer_load ();
      update_disk_space ();
      return TRUE;
}

gint
ARDOUR_UI::every_point_one_seconds ()
{
      update_speed_display ();
      RapidScreenUpdate(); /* EMIT_SIGNAL */
      return TRUE;
}

gint
ARDOUR_UI::every_point_zero_one_seconds ()
{
      SuperRapidScreenUpdate(); /* EMIT_SIGNAL */
      return TRUE;
}

void
ARDOUR_UI::update_sample_rate (nframes_t ignored)
{
      char buf[32];

      ENSURE_GUI_THREAD (bind (mem_fun(*this, &ARDOUR_UI::update_sample_rate), ignored));

      if (!engine->connected()) {

            snprintf (buf, sizeof (buf), _("disconnected"));

      } else {

            nframes_t rate = engine->frame_rate();
            
            if (fmod (rate, 1000.0) != 0.0) {
                  snprintf (buf, sizeof (buf), _("%.1f kHz / %4.1f ms"), 
                          (float) rate/1000.0f,
                          (engine->frames_per_cycle() / (float) rate) * 1000.0f);
            } else {
                  snprintf (buf, sizeof (buf), _("%u kHz / %4.1f ms"), 
                          rate/1000,
                          (engine->frames_per_cycle() / (float) rate) * 1000.0f);
            }
      }

      sample_rate_label.set_text (buf);
}

void
ARDOUR_UI::update_cpu_load ()
{
      char buf[32];
      snprintf (buf, sizeof (buf), _("DSP: %5.1f%%"), engine->get_cpu_load());
      cpu_load_label.set_text (buf);
}

void
ARDOUR_UI::update_buffer_load ()
{
      char buf[64];

      if (session) {
            snprintf (buf, sizeof (buf), _("Buffers p:%" PRIu32 "%% c:%" PRIu32 "%%"), 
                    session->playback_load(), session->capture_load());
            buffer_load_label.set_text (buf);
      } else {
            buffer_load_label.set_text ("");
      }
}

void
ARDOUR_UI::count_recenabled_streams (Route& route)
{
      Track* track = dynamic_cast<Track*>(&route);
      if (track && track->diskstream()->record_enabled()) {
            rec_enabled_streams += track->n_inputs();
      }
}

void
ARDOUR_UI::update_disk_space()
{
      if (session == 0) {
            return;
      }

      nframes_t frames = session->available_capture_duration();
      char buf[64];

      if (frames == max_frames) {
            strcpy (buf, _("Disk: 24hrs+"));
      } else {
            int hrs;
            int mins;
            int secs;
            nframes_t fr = session->frame_rate();
            
            rec_enabled_streams = 0;
            session->foreach_route (this, &ARDOUR_UI::count_recenabled_streams);
            
            if (rec_enabled_streams) {
                  frames /= rec_enabled_streams;
            }
            
            hrs  = frames / (fr * 3600);
            frames -= hrs * fr * 3600;
            mins = frames / (fr * 60);
            frames -= mins * fr * 60;
            secs = frames / fr;
            
            snprintf (buf, sizeof(buf), _("Disk: %02dh:%02dm:%02ds"), hrs, mins, secs);
      }

      disk_space_label.set_text (buf);
}             

gint
ARDOUR_UI::update_wall_clock ()
{
      time_t now;
      struct tm *tm_now;
      char buf[16];

      time (&now);
      tm_now = localtime (&now);

      sprintf (buf, "%02d:%02d", tm_now->tm_hour, tm_now->tm_min);
      wall_clock_label.set_text (buf);

      return TRUE;
}

gint
ARDOUR_UI::session_menu (GdkEventButton *ev)
{
      session_popup_menu->popup (0, 0);
      return TRUE;
}

void
ARDOUR_UI::redisplay_recent_sessions ()
{
      vector<string *> *sessions;
      vector<string *>::iterator i;
      RecentSessionsSorter cmp;
      
      recent_session_display.set_model (Glib::RefPtr<TreeModel>(0));
      recent_session_model->clear ();

      RecentSessions rs;
      ARDOUR::read_recent_sessions (rs);

      if (rs.empty()) {
            recent_session_display.set_model (recent_session_model);
            return;
      }

      /* sort them alphabetically */
      sort (rs.begin(), rs.end(), cmp);
      sessions = new vector<string*>;

      for (RecentSessions::iterator i = rs.begin(); i != rs.end(); ++i) {
            sessions->push_back (new string ((*i).second));
      }

      for (i = sessions->begin(); i != sessions->end(); ++i) {

            vector<string*>* states;
            vector<const gchar*> item;
            string fullpath = *(*i);
            
            /* remove any trailing / */

            if (fullpath[fullpath.length()-1] == '/') {
                  fullpath = fullpath.substr (0, fullpath.length()-1);
            }

            /* now get available states for this session */

            if ((states = Session::possible_states (fullpath)) == 0) {
                  /* no state file? */
                  continue;
            }

            TreeModel::Row row = *(recent_session_model->append());

            row[recent_session_columns.visible_name] = Glib::path_get_basename (fullpath);
            row[recent_session_columns.fullpath] = fullpath;

            if (states->size() > 1) {

                  /* add the children */
                  
                  for (vector<string*>::iterator i2 = states->begin(); i2 != states->end(); ++i2) {
                        
                        TreeModel::Row child_row = *(recent_session_model->append (row.children()));

                        child_row[recent_session_columns.visible_name] = **i2;
                        child_row[recent_session_columns.fullpath] = fullpath;

                        delete *i2;
                  }
            }

            delete states;
      }

      recent_session_display.set_model (recent_session_model);
      delete sessions;
}

void
ARDOUR_UI::build_session_selector ()
{
      session_selector_window = new ArdourDialog ("session selector");
      
      Gtk::ScrolledWindow *scroller = manage (new Gtk::ScrolledWindow);
      
      session_selector_window->add_button (Stock::CANCEL, RESPONSE_CANCEL);
      session_selector_window->add_button (Stock::OPEN, RESPONSE_ACCEPT);
      session_selector_window->set_default_response (RESPONSE_ACCEPT);
      recent_session_model = TreeStore::create (recent_session_columns);
      recent_session_display.set_model (recent_session_model);
      recent_session_display.append_column (_("Recent Sessions"), recent_session_columns.visible_name);
      recent_session_display.set_headers_visible (false);
      recent_session_display.get_selection()->set_mode (SELECTION_SINGLE);

      recent_session_display.signal_row_activated().connect (mem_fun (*this, &ARDOUR_UI::recent_session_row_activated));

      scroller->add (recent_session_display);
      scroller->set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

      session_selector_window->set_name ("SessionSelectorWindow");
      session_selector_window->set_size_request (200, 400);
      session_selector_window->get_vbox()->pack_start (*scroller);
      session_selector_window->show_all_children();
}

void
ARDOUR_UI::recent_session_row_activated (const TreePath& path, TreeViewColumn* col)
{
      session_selector_window->response (RESPONSE_ACCEPT);
}

void
ARDOUR_UI::open_recent_session ()
{
      /* popup selector window */

      if (session_selector_window == 0) {
            build_session_selector ();
      }

      redisplay_recent_sessions ();

      ResponseType r = (ResponseType) session_selector_window->run ();

      session_selector_window->hide();

      switch (r) {
      case RESPONSE_ACCEPT:
            break;
      default:
            return;
      }

      Gtk::TreeModel::iterator i = recent_session_display.get_selection()->get_selected();

      if (i == recent_session_model->children().end()) {
            return;
      }
      
      Glib::ustring path = (*i)[recent_session_columns.fullpath];
      Glib::ustring state = (*i)[recent_session_columns.visible_name];

      _session_is_new = false;

      load_session (path, state);
}

bool
ARDOUR_UI::filter_ardour_session_dirs (const FileFilter::Info& info) 
{
      struct stat statbuf;

      if (stat (info.filename.c_str(), &statbuf) != 0) {
            return false;
      }

      if (!S_ISDIR(statbuf.st_mode)) {
            return false;
      }

        // XXX Portability
        
      string session_file = info.filename;
      session_file += '/';
      session_file += Glib::path_get_basename (info.filename);
      session_file += ".ardour";
      
      if (stat (session_file.c_str(), &statbuf) != 0) {
            return false;
      }

      return S_ISREG (statbuf.st_mode);
}

bool
ARDOUR_UI::check_audioengine ()
{
      if (engine) {
            if (!engine->connected()) {
                  MessageDialog msg (_("Ardour is not connected to JACK\n"
                                   "You cannot open or close sessions in this condition"));
                  msg.run ();
                  return false;
            }
            return true;
      } else {
            return false;
      }
}

void
ARDOUR_UI::open_session ()
{
      if (!check_audioengine()) {
            return;
            
      }

      /* popup selector window */

      if (open_session_selector == 0) {

            /* ardour sessions are folders */

            open_session_selector = new Gtk::FileChooserDialog (_("open session"), FILE_CHOOSER_ACTION_OPEN);
            open_session_selector->add_button (Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
            open_session_selector->add_button (Gtk::Stock::OPEN, Gtk::RESPONSE_ACCEPT);

            FileFilter session_filter;
            session_filter.add_pattern ("*.ardour");
            session_filter.set_name (_("Ardour sessions"));
            open_session_selector->add_filter (session_filter);
            open_session_selector->set_filter (session_filter);
      }

      int response = open_session_selector->run();
      open_session_selector->hide ();

      switch (response) {
      case RESPONSE_ACCEPT:
            break;
      default:
            open_session_selector->hide();
            return;
      }

      open_session_selector->hide();
      string session_path = open_session_selector->get_filename();
      string path, name;
      bool isnew;

      if (session_path.length() > 0) {
            if (Session::find_session (session_path, path, name, isnew) == 0) {
                  _session_is_new = isnew;
                  load_session (path, name);
            }
      }
}


void
ARDOUR_UI::session_add_midi_track ()
{
      cerr << _("Patience is a virtue.\n");
}

void
ARDOUR_UI::session_add_audio_route (bool track, int32_t input_channels, int32_t output_channels, ARDOUR::TrackMode mode, uint32_t how_many)
{
      list<boost::shared_ptr<AudioTrack> > tracks;
      Session::RouteList routes;

      if (session == 0) {
            warning << _("You cannot add a track or bus without a session already loaded.") << endmsg;
            return;
      }

      try { 
            if (track) {
                  tracks = session->new_audio_track (input_channels, output_channels, mode, how_many);

                  if (tracks.size() != how_many) {
                        if (how_many == 1) {
                              error << _("could not create a new audio track") << endmsg;
                        } else {
                              error << string_compose (_("could only create %1 of %2 new audio %3"), 
                                                 tracks.size(), how_many, (track ? _("tracks") : _("busses"))) << endmsg;
                        }
                  }

            } else {

                  routes = session->new_audio_route (input_channels, output_channels, how_many);

                  if (routes.size() != how_many) {
                        if (how_many == 1) {
                              error << _("could not create a new audio track") << endmsg;
                        } else {
                              error << string_compose (_("could not create %1 new audio tracks"), how_many) << endmsg;
                        }
                  }
            }
            
#if CONTROLOUTS
            if (need_control_room_outs) {
                  pan_t pans[2];
                  
                  pans[0] = 0.5;
                  pans[1] = 0.5;
                  
                  route->set_stereo_control_outs (control_lr_channels);
                  route->control_outs()->set_stereo_pan (pans, this);
            }
#endif /* CONTROLOUTS */
      }

      catch (...) {
            cerr << "About to complain about JACK\n";
            MessageDialog msg (*editor, 
                           _("There are insufficient JACK ports available\n\
to create a new track or bus.\n\
You should save Ardour, exit and\n\
restart JACK with more ports."));
            msg.run ();
      }
}

void
ARDOUR_UI::do_transport_locate (nframes_t new_position)
{
      nframes_t _preroll = 0;

      if (session) {
            // XXX CONFIG_CHANGE FIX - requires AnyTime handling
            // _preroll = session->convert_to_frames_at (new_position, Config->get_preroll());

            if (new_position > _preroll) {
                  new_position -= _preroll;
            } else {
                  new_position = 0;
            }

            session->request_locate (new_position);
      }
}

void
ARDOUR_UI::transport_goto_start ()
{
      if (session) {
            session->goto_start();

            
            /* force displayed area in editor to start no matter
               what "follow playhead" setting is.
            */
            
            if (editor) {
                  editor->reset_x_origin (session->current_start_frame());
            }
      }
}

void
ARDOUR_UI::transport_goto_zero ()
{
      if (session) {
            session->request_locate (0);

            
            /* force displayed area in editor to start no matter
               what "follow playhead" setting is.
            */
            
            if (editor) {
                  editor->reset_x_origin (0);
            }
      }
}

void
ARDOUR_UI::transport_goto_end ()
{
      if (session) {
            nframes_t frame = session->current_end_frame();
            session->request_locate (frame);

            /* force displayed area in editor to start no matter
               what "follow playhead" setting is.
            */
            
            if (editor) {
                  editor->reset_x_origin (frame);
            }
      }
}

void
ARDOUR_UI::transport_stop ()
{
      if (!session) {
            return;
      }

      if (session->is_auditioning()) {
            session->cancel_audition ();
            return;
      }
      
      if (session->get_play_loop ()) {
            session->request_play_loop (false);
      }
      
      session->request_stop ();
}

void
ARDOUR_UI::transport_stop_and_forget_capture ()
{
      if (session) {
            session->request_stop (true);
      }
}

void
ARDOUR_UI::remove_last_capture()
{
      if (editor) {
            editor->remove_last_capture();
      }
}

void
ARDOUR_UI::transport_record ()
{
      if (session) {
            switch (session->record_status()) {
            case Session::Disabled:
                  if (session->ntracks() == 0) {
                        MessageDialog msg (*editor, _("Please create 1 or more track\nbefore trying to record.\nCheck the Session menu."));
                        msg.run ();
                        return;
                  }
                  session->maybe_enable_record ();
                  break;
            case Session::Recording:
            case Session::Enabled:
                  session->disable_record (false, true);
            }
      }
}

void
ARDOUR_UI::transport_roll ()
{
      bool rolling;

      if (!session) {
            return;
      }

      rolling = session->transport_rolling ();

      if (session->get_play_loop()) {
            session->request_play_loop (false);
            auto_loop_button.set_visual_state (1);
            roll_button.set_visual_state (1);
      } else if (session->get_play_range ()) {
            session->request_play_range (false);
            play_selection_button.set_visual_state (0);
      } else if (rolling) {
            session->request_locate (session->last_transport_start(), true);
      }

      session->request_transport_speed (1.0f);
}

void
ARDOUR_UI::transport_loop()
{
      if (session) {
            if (session->get_play_loop()) {
                  if (session->transport_rolling()) {
                        Location * looploc = session->locations()->auto_loop_location();
                        if (looploc) {
                              session->request_locate (looploc->start(), true);
                        }
                  }
            }
            else {
                  session->request_play_loop (true);
            }
      }
}

void
ARDOUR_UI::transport_play_selection ()
{
      if (!session) {
            return;
      }

      if (!session->get_play_range()) {
            session->request_stop ();
      }

      editor->play_selection ();
}

void
ARDOUR_UI::transport_rewind (int option)
{
      float current_transport_speed;
 
            if (session) {
            current_transport_speed = session->transport_speed();
            
            if (current_transport_speed >= 0.0f) {
                  switch (option) {
                  case 0:
                        session->request_transport_speed (-1.0f);
                        break;
                  case 1:
                        session->request_transport_speed (-4.0f);
                        break;
                  case -1:
                        session->request_transport_speed (-0.5f);
                        break;
                  }
            } else {
                  /* speed up */
                  session->request_transport_speed (current_transport_speed * 1.5f);
            }
      }
}

void
ARDOUR_UI::transport_forward (int option)
{
      float current_transport_speed;
      
      if (session) {
            current_transport_speed = session->transport_speed();
            
            if (current_transport_speed <= 0.0f) {
                  switch (option) {
                  case 0:
                        session->request_transport_speed (1.0f);
                        break;
                  case 1:
                        session->request_transport_speed (4.0f);
                        break;
                  case -1:
                        session->request_transport_speed (0.5f);
                        break;
                  }
            } else {
                  /* speed up */
                  session->request_transport_speed (current_transport_speed * 1.5f);
            }
      }
}

void
ARDOUR_UI::toggle_record_enable (uint32_t dstream)
{
      if (session == 0) {
            return;
      }

      boost::shared_ptr<Route> r;
      
      if ((r = session->route_by_remote_id (dstream)) != 0) {

            Track* t;

            if ((t = dynamic_cast<Track*>(r.get())) != 0) {
                  t->diskstream()->set_record_enabled (!t->diskstream()->record_enabled());
            }
      }
      if (session == 0) {
            return;
      }
}

void
ARDOUR_UI::queue_transport_change ()
{
      Gtkmm2ext::UI::instance()->call_slot (mem_fun(*this, &ARDOUR_UI::map_transport_state));
}

void
ARDOUR_UI::map_transport_state ()
{
      float sp = session->transport_speed();

      if (sp == 1.0f) {
            transport_rolling ();
      } else if (sp < 0.0f) {
            transport_rewinding ();
      } else if (sp > 0.0f) {
            transport_forwarding ();
      } else {
            transport_stopped ();
      }
}

void
ARDOUR_UI::GlobalClickBox::printer (char buf[32], Adjustment &adj, void *arg)
{
      snprintf (buf, sizeof(buf), "%s", ((GlobalClickBox *) arg)->strings[
            (int) adj.get_value()].c_str());
}

void
ARDOUR_UI::engine_stopped ()
{
      ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::engine_stopped));
      ActionManager::set_sensitive (ActionManager::jack_sensitive_actions, false);
      ActionManager::set_sensitive (ActionManager::jack_opposite_sensitive_actions, true);
}

void
ARDOUR_UI::engine_running ()
{
      ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::engine_running));
      ActionManager::set_sensitive (ActionManager::jack_sensitive_actions, true);
      ActionManager::set_sensitive (ActionManager::jack_opposite_sensitive_actions, false);

      Glib::RefPtr<Action> action;
      char* action_name = 0;

      switch (engine->frames_per_cycle()) {
      case 32:
            action_name = X_("JACKLatency32");
            break;
      case 64:
            action_name = X_("JACKLatency64");
            break;
      case 128:
            action_name = X_("JACKLatency128");
            break;
      case 512:
            action_name = X_("JACKLatency512");
            break;
      case 1024:
            action_name = X_("JACKLatency1024");
            break;
      case 2048:
            action_name = X_("JACKLatency2048");
            break;
      case 4096:
            action_name = X_("JACKLatency4096");
            break;
      case 8192:
            action_name = X_("JACKLatency8192");
            break;
      default:
            /* XXX can we do anything useful ? */
            break;
      }

      if (action_name) {

            action = ActionManager::get_action (X_("JACK"), action_name);
            
            if (action) {
                  Glib::RefPtr<RadioAction> ract = Glib::RefPtr<RadioAction>::cast_dynamic (action);
                  ract->set_active ();
            }
      }
}

void
ARDOUR_UI::engine_halted ()
{
      ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::engine_halted));

      ActionManager::set_sensitive (ActionManager::jack_sensitive_actions, false);
      ActionManager::set_sensitive (ActionManager::jack_opposite_sensitive_actions, true);

      update_sample_rate (0);

      MessageDialog msg (*editor, 
                     _("\
JACK has either been shutdown or it\n\
disconnected Ardour because Ardour\n\
was not fast enough. You can save the\n\
session and/or try to reconnect to JACK ."));
      msg.run ();
}

int32_t
ARDOUR_UI::do_engine_start ()
{
      try { 
            engine->start();
      }

      catch (...) {
            engine->stop ();
            error << _("Unable to start the session running")
                  << endmsg;
            unload_session ();
            return -2;
      }
      
      return 0;
}

void
ARDOUR_UI::setup_theme ()
{
      theme_manager->setup_theme();
}

gint
ARDOUR_UI::start_engine ()
{
      if (do_engine_start () == 0) {
            if (session && _session_is_new) {
                  /* we need to retain initial visual 
                     settings for a new session 
                  */
                  session->save_state ("");
            }
      }

      return FALSE;
}

void
ARDOUR_UI::update_clocks ()
{
      if (!editor || !editor->dragging_playhead()) {
            Clock (session->audible_frame(), false, editor->edit_cursor_position(false)); /* EMIT_SIGNAL */
      }
}

void
ARDOUR_UI::start_clocking ()
{
      clock_signal_connection = RapidScreenUpdate.connect (mem_fun(*this, &ARDOUR_UI::update_clocks));
}

void
ARDOUR_UI::stop_clocking ()
{
      clock_signal_connection.disconnect ();
}
      
void
ARDOUR_UI::toggle_clocking ()
{
#if 0
      if (clock_button.get_active()) {
            start_clocking ();
      } else {
            stop_clocking ();
      }
#endif
}

gint
ARDOUR_UI::_blink (void *arg)

{
      ((ARDOUR_UI *) arg)->blink ();
      return TRUE;
}

void
ARDOUR_UI::blink ()
{
      Blink (blink_on = !blink_on); /* EMIT_SIGNAL */
}

void
ARDOUR_UI::start_blinking ()
{
      /* Start the blink signal. Everybody with a blinking widget
         uses Blink to drive the widget's state.
      */

      if (blink_timeout_tag < 0) {
            blink_on = false; 
            blink_timeout_tag = g_timeout_add (240, _blink, this);
      }
}

void
ARDOUR_UI::stop_blinking ()
{
      if (blink_timeout_tag >= 0) {
            g_source_remove (blink_timeout_tag);
            blink_timeout_tag = -1;
      }
}

void
ARDOUR_UI::name_io_setup (AudioEngine& engine, 
                    string& buf,
                    IO& io,
                    bool in)
{
      if (in) {
            if (io.n_inputs() == 0) {
                  buf = _("none");
                  return;
            }
            
            /* XXX we're not handling multiple ports yet. */

            const char **connections = io.input(0)->get_connections();
            
            if (connections == 0 || connections[0] == '\0') {
                  buf = _("off");
            } else {
                  buf = connections[0];
            }

            free (connections);

      } else {

            if (io.n_outputs() == 0) {
                  buf = _("none");
                  return;
            }
            
            /* XXX we're not handling multiple ports yet. */

            const char **connections = io.output(0)->get_connections();
            
            if (connections == 0 || connections[0] == '\0') {
                  buf = _("off");
            } else {
                  buf = connections[0];
            }

            free (connections);
      }
}

/** Ask the user for the name of a new shapshot and then take it.
 */
void
ARDOUR_UI::snapshot_session ()
{
      ArdourPrompter prompter (true);
      string snapname;
      char timebuf[128];
      time_t n;
      struct tm local_time;

      time (&n);
      localtime_r (&n, &local_time);
      strftime (timebuf, sizeof(timebuf), "%FT%T", &local_time);

      prompter.set_name ("Prompter");
      prompter.add_button (Gtk::Stock::SAVE, Gtk::RESPONSE_ACCEPT);
      prompter.set_prompt (_("Name of New Snapshot"));
      prompter.set_initial_text (timebuf);
      
      switch (prompter.run()) {
      case RESPONSE_ACCEPT:
            prompter.get_result (snapname);
            if (snapname.length()){
                  save_state (snapname);
            }
            break;

      default:
            break;
      }
}

void
ARDOUR_UI::save_state (const string & name)
{
      (void) save_state_canfail (name);
}
            
int
ARDOUR_UI::save_state_canfail (string name)
{
      if (session) {
            int ret;

            if (name.length() == 0) {
                  name = session->snap_name();
            }

            if ((ret = session->save_state (name)) != 0) {
                  return ret;
            }
      }
      save_ardour_state (); /* XXX cannot fail? yeah, right ... */
      return 0;
}

void
ARDOUR_UI::restore_state (string name)
{
      if (session) {
            if (name.length() == 0) {
                  name = session->name();
            }
            session->restore_state (name);
      }
}

void
ARDOUR_UI::primary_clock_value_changed ()
{
      if (session) {
            session->request_locate (primary_clock.current_time ());
      }
}

void
ARDOUR_UI::secondary_clock_value_changed ()
{
      if (session) {
            session->request_locate (secondary_clock.current_time ());
      }
}

void
ARDOUR_UI::rec_enable_button_blink (bool onoff, AudioDiskstream *dstream, Widget *w)
{
      if (session && dstream && dstream->record_enabled()) {

            Session::RecordState rs;
            
            rs = session->record_status ();

            switch (rs) {
            case Session::Disabled:
            case Session::Enabled:
                  if (w->get_state() != STATE_SELECTED) {
                        w->set_state (STATE_SELECTED);
                  }
                  break;

            case Session::Recording:
                  if (w->get_state() != STATE_ACTIVE) {
                        w->set_state (STATE_ACTIVE);
                  }
                  break;
            }

      } else {
            if (w->get_state() != STATE_NORMAL) {
                  w->set_state (STATE_NORMAL);
            }
      }
}

void
ARDOUR_UI::transport_rec_enable_blink (bool onoff) 
{
      if (session == 0) {
            return;
      }
      
      switch (session->record_status()) {
      case Session::Enabled:
            if (onoff) {
                  rec_button.set_visual_state (2);
            } else {
                  rec_button.set_visual_state (0);
            }
            break;

      case Session::Recording:
            rec_button.set_visual_state (1);
            break;

      default:
            rec_button.set_visual_state (0);
            break;
      }
}

gint
ARDOUR_UI::hide_and_quit (GdkEventAny *ev, ArdourDialog *window)
{
      window->hide();
      Gtk::Main::quit ();
      return TRUE;
}

void
ARDOUR_UI::save_template ()

{
      ArdourPrompter prompter (true);
      string name;

      prompter.set_name (X_("Prompter"));
      prompter.set_prompt (_("Name for mix template:"));
      prompter.set_initial_text(session->name() + _("-template"));
      prompter.add_button (Gtk::Stock::SAVE, Gtk::RESPONSE_ACCEPT);

      switch (prompter.run()) {
      case RESPONSE_ACCEPT:
            prompter.get_result (name);
            
            if (name.length()) {
                  session->save_template (name);
            }
            break;

      default:
            break;
      }
}

bool
ARDOUR_UI::new_session (std::string predetermined_path)
{
      string session_name;
      string session_path;

      if (!check_audioengine()) {
            return false;
      }

      int response = Gtk::RESPONSE_NONE;

      new_session_dialog->set_modal(true);
      new_session_dialog->set_name (predetermined_path);
      new_session_dialog->reset_recent();
      new_session_dialog->show();
      new_session_dialog->set_current_page (0);

      do {
              response = new_session_dialog->run ();

            if (!check_audioengine()) {
                  new_session_dialog->hide ();
                  return false;
            }
            
            _session_is_new = false;

            if (response == Gtk::RESPONSE_CANCEL || response == Gtk::RESPONSE_DELETE_EVENT) {

                  if (!session) {
                        quit();
                  }
                  new_session_dialog->hide ();
                  return false;

            } else if (response == Gtk::RESPONSE_NONE) {

                    /* Clear was pressed */
                    new_session_dialog->reset();

            } else if (response == Gtk::RESPONSE_YES) {

                    /* YES  == OPEN, but there's no enum for that */

                    session_name = new_session_dialog->session_name();
                  
                  if (session_name.empty()) {
                        response = Gtk::RESPONSE_NONE;
                        continue;
                  } 

                  if (session_name[0] == '/' || 
                      (session_name.length() > 2 && session_name[0] == '.' && session_name[1] == '/') ||
                      (session_name.length() > 3 && session_name[0] == '.' && session_name[1] == '.' && session_name[2] == '/')) {
                        load_session (Glib::path_get_dirname (session_name), session_name);
                  } else {
                        session_path = new_session_dialog->session_folder();
                        load_session (session_path, session_name);
                  }
                  
            } else if (response == Gtk::RESPONSE_OK) {

                  session_name = new_session_dialog->session_name();
                  
                    if (new_session_dialog->get_current_page() == 1) {
              
                          /* XXX this is a bit of a hack.. 
                           i really want the new sesion dialog to return RESPONSE_YES
                           if we're on page 1 (the load page)
                           Unfortunately i can't see how atm.. 
                        */
                        
                        if (session_name.empty()) {
                              response = Gtk::RESPONSE_NONE;
                              continue;
                        } 
                        
                        if (session_name[0] == '/' || 
                            (session_name.length() > 2 && session_name[0] == '.' && session_name[1] == '/') ||
                            (session_name.length() > 3 && session_name[0] == '.' && session_name[1] == '.' && session_name[2] == '/')) {
                              load_session (Glib::path_get_dirname (session_name), session_name);
                        } else {
                              session_path = new_session_dialog->session_folder();
                              load_session (session_path, session_name);
                        }
                  
                  } else {

                        if (session_name.empty()) {
                              response = Gtk::RESPONSE_NONE;
                              continue;
                        } 

                        if (session_name[0] == '/' || 
                            (session_name.length() > 2 && session_name[0] == '.' && session_name[1] == '/') ||
                            (session_name.length() > 3 && session_name[0] == '.' && session_name[1] == '.' && session_name[2] == '/')) {

                              session_path = Glib::path_get_dirname (session_name);
                              session_name = Glib::path_get_basename (session_name);

                        } else {

                              session_path = new_session_dialog->session_folder();

                        }
                        
                        //XXX This is needed because session constructor wants a 
                        //non-existant path. hopefully this will be fixed at some point.
                        
                        session_path = Glib::build_filename (session_path, session_name);
                                    
                        if (g_file_test (session_path.c_str(), GFileTest (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR))) {

                              Glib::ustring str = string_compose (_("This session\n%1\nalready exists. Do you want to open it?"), session_path);

                              MessageDialog msg (str,
                                             false,
                                             Gtk::MESSAGE_WARNING,
                                             Gtk::BUTTONS_YES_NO,
                                             true);


                              msg.set_name (X_("CleanupDialog"));
                              msg.set_wmclass (X_("existing_session"), "Ardour");
                              msg.set_position (Gtk::WIN_POS_MOUSE);
                              
                              switch (msg.run()) {
                              case RESPONSE_YES:
                                    load_session (session_path, session_name);
                                    goto done;
                                    break;
                              default:
                                    response = RESPONSE_NONE;
                                    new_session_dialog->reset ();
                                    continue;
                              }
                        }

                          _session_is_new = true;

                        std::string template_name = new_session_dialog->session_template_name();
                                    
                        if (new_session_dialog->use_session_template()) {
                                          
                              load_session (session_path, session_name, &template_name);
                    
                        } else {
                                          
                              uint32_t cchns;
                              uint32_t mchns;
                              AutoConnectOption iconnect;
                              AutoConnectOption oconnect;
                                          
                              if (new_session_dialog->create_control_bus()) {
                                    cchns = (uint32_t) new_session_dialog->control_channel_count();
                              } else {
                                    cchns = 0;
                              }
                                          
                              if (new_session_dialog->create_master_bus()) {
                                    mchns = (uint32_t) new_session_dialog->master_channel_count();
                              } else {
                                    mchns = 0;
                              }
                                          
                              if (new_session_dialog->connect_inputs()) {
                                    iconnect = AutoConnectPhysical;
                              } else {
                                    iconnect = AutoConnectOption (0);
                              }
                                          
                              /// @todo some minor tweaks.
                                          
                              if (new_session_dialog->connect_outs_to_master()) {
                                    oconnect = AutoConnectMaster;
                              } else if (new_session_dialog->connect_outs_to_physical()) {
                                    oconnect = AutoConnectPhysical;
                              } else {
                                    oconnect = AutoConnectOption (0);
                              } 
                                          
                              uint32_t nphysin = (uint32_t) new_session_dialog->input_limit_count();
                              uint32_t nphysout = (uint32_t) new_session_dialog->output_limit_count();
                                          
                              if (build_session (session_path,
                                             session_name,
                                             cchns,
                                             mchns,
                                             iconnect,
                                             oconnect,
                                             nphysin,
                                             nphysout, 
                                             engine->frame_rate() * 60 * 5)) {

                                    response = Gtk::RESPONSE_NONE;
                                    new_session_dialog->reset ();
                                    continue;
                              }
                        }
                  }
            }
            
      } while (response == Gtk::RESPONSE_NONE);

  done:
      show();
      new_session_dialog->get_window()->set_cursor();
      new_session_dialog->hide();
      return true;
}

void
ARDOUR_UI::close_session()
{
      if (!check_audioengine()) {
            return;
      }

      unload_session();
      new_session ();
}

int
ARDOUR_UI::load_session (const string & path, const string & snap_name, string* mix_template)
{
      Session *new_session;
      int x;
      session_loaded = false;
      
      if (!check_audioengine()) {
            return -1;
      }

      x = unload_session ();

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

      /* if it already exists, we must have write access */

      if (::access (path.c_str(), F_OK) == 0 && ::access (path.c_str(), W_OK)) {
            MessageDialog msg (*editor, _("You do not have write access to this session.\n"
                                    "This prevents the session from being loaded."));
            msg.run ();
            return -1;
      }

      try {
            new_session = new Session (*engine, path, snap_name, mix_template);
      }

      catch (...) {

            error << string_compose(_("Session \"%1 (snapshot %2)\" did not load successfully"), path, snap_name) << endmsg;
            return -1;
      }

      connect_to_session (new_session);

      Config->set_current_owner (ConfigVariableBase::Interface);

      session_loaded = true;
      
      goto_editor_window ();

      if (session) {
            session->set_clean ();
      }

      editor->edit_cursor_position (true);
      return 0;
}

int
ARDOUR_UI::build_session (const string & path, const string & snap_name, 
                    uint32_t control_channels,
                    uint32_t master_channels, 
                    AutoConnectOption input_connect,
                    AutoConnectOption output_connect,
                    uint32_t nphysin,
                    uint32_t nphysout,
                    nframes_t initial_length)
{
      Session *new_session;
      int x;

      if (!check_audioengine()) {
            return -1;
      }

      session_loaded = false;

      x = unload_session ();

      if (x < 0) {
            return -1;
      } else if (x > 0) {
            return 0;
      }
      
      _session_is_new = true;

      try {
            new_session = new Session (*engine, path, snap_name, input_connect, output_connect,
                                 control_channels, master_channels, nphysin, nphysout, initial_length);
      }

      catch (...) {

            MessageDialog msg (string_compose(_("Could not create session in \"%1\""), path));
            msg.run ();
            return -1;
      }

      connect_to_session (new_session);

      session_loaded = true;
      return 0;
}

void
ARDOUR_UI::show ()
{
      if (editor) {
            editor->show_window ();
            
            if (!shown_flag) {
                  editor->present ();
            }

            shown_flag = true;
      }
}

void
ARDOUR_UI::show_splash ()
{
      if (about == 0) {
            about = new About();
            about->signal_response().connect(mem_fun (*this, &ARDOUR_UI::about_signal_response) );
      }
      about->present();
      flush_pending ();
}

void
ARDOUR_UI::about_signal_response(int response)
{
      hide_splash();
}

void
ARDOUR_UI::hide_splash ()
{
      if (about) {
              about->get_window()->set_cursor ();
            about->hide();
      }
}

void
ARDOUR_UI::display_cleanup_results (Session::cleanup_report& rep, const gchar* list_title, const string & msg)
{
      size_t removed;

      removed = rep.paths.size();

      if (removed == 0) {
            MessageDialog msgd (*editor,
                            _("No audio files were ready for cleanup"), 
                            true,
                            Gtk::MESSAGE_INFO,
                            (Gtk::ButtonsType)(Gtk::BUTTONS_OK)  );
            msgd.set_secondary_text (_("If this seems suprising, \n\
check for any existing snapshots.\n\
These may still include regions that\n\
require some unused files to continue to exist."));
      
            msgd.run ();
            return;
      } 

      ArdourDialog results (_("ardour: cleanup"), true, false);
      
      struct CleanupResultsModelColumns : public Gtk::TreeModel::ColumnRecord {
          CleanupResultsModelColumns() { 
                add (visible_name);
                add (fullpath);
          }
          Gtk::TreeModelColumn<Glib::ustring> visible_name;
          Gtk::TreeModelColumn<Glib::ustring> fullpath;
      };

      
      CleanupResultsModelColumns results_columns;
      Glib::RefPtr<Gtk::ListStore> results_model;
      Gtk::TreeView results_display;
      
      results_model = ListStore::create (results_columns);
      results_display.set_model (results_model);
      results_display.append_column (list_title, results_columns.visible_name);

      results_display.set_name ("CleanupResultsList");
      results_display.set_headers_visible (true);
      results_display.set_headers_clickable (false);
      results_display.set_reorderable (false);

      Gtk::ScrolledWindow list_scroller;
      Gtk::Label txt;
      Gtk::VBox dvbox;
      Gtk::HBox dhbox;  // the hbox for the image and text
      Gtk::HBox ddhbox; // the hbox we eventually pack into the dialog's vbox
      Gtk::Image* dimage = manage (new Gtk::Image(Stock::DIALOG_INFO,  Gtk::ICON_SIZE_DIALOG));

      dimage->set_alignment(ALIGN_LEFT, ALIGN_TOP);

      if (rep.space < 1048576.0f) {
            if (removed > 1) {
              txt.set_text (string_compose (msg, removed, _("files were"), session->path() + "dead_sounds", (float) rep.space / 1024.0f, "kilo"));
            } else {
                  txt.set_text (string_compose (msg, removed, _("file was"), session->path() + "dead_sounds", (float) rep.space / 1024.0f, "kilo"));
            }
      } else {
            if (removed > 1) {
                  txt.set_text (string_compose (msg, removed, _("files were"), session->path() + "dead_sounds", (float) rep.space / 1048576.0f, "mega"));
            } else {
                  txt.set_text (string_compose (msg, removed, _("file was"), session->path() + "dead_sounds", (float) rep.space / 1048576.0f, "mega"));
            }
      }

      dhbox.pack_start (*dimage, true, false, 5);
      dhbox.pack_start (txt, true, false, 5);

      for (vector<string>::iterator i = rep.paths.begin(); i != rep.paths.end(); ++i) {
            TreeModel::Row row = *(results_model->append());
            row[results_columns.visible_name] = *i;
            row[results_columns.fullpath] = *i;
      }
      
      list_scroller.add (results_display);
      list_scroller.set_size_request (-1, 150);
      list_scroller.set_policy (Gtk::POLICY_NEVER, Gtk::POLICY_AUTOMATIC);

      dvbox.pack_start (dhbox, true, false, 5);
      dvbox.pack_start (list_scroller, true, false, 5);
      ddhbox.pack_start (dvbox, true, false, 5);

      results.get_vbox()->pack_start (ddhbox, true, false, 5);
      results.add_button (Stock::CLOSE, RESPONSE_CLOSE);
      results.set_default_response (RESPONSE_CLOSE);
      results.set_position (Gtk::WIN_POS_MOUSE);
      results.show_all_children ();
      results.set_resizable (false);

      results.run ();

}

void
ARDOUR_UI::cleanup ()
{
      if (session == 0) {
            /* shouldn't happen: menu item is insensitive */
            return;
      }


      MessageDialog  checker (_("Are you sure you want to cleanup?"),
                        true,
                        Gtk::MESSAGE_QUESTION,
                        (Gtk::ButtonsType)(Gtk::BUTTONS_NONE));

      checker.set_secondary_text(_("Cleanup is a destructive operation.\n\
ALL undo/redo information will be lost if you cleanup.\n\
After cleanup, unused audio files will be moved to a \
\"dead sounds\" location."));
      
      checker.add_button (Stock::CANCEL, RESPONSE_CANCEL);
      checker.add_button (_("Clean Up"), RESPONSE_ACCEPT);
      checker.set_default_response (RESPONSE_CANCEL);

      checker.set_name (_("CleanupDialog"));
      checker.set_wmclass (X_("ardour_cleanup"), "Ardour");
      checker.set_position (Gtk::WIN_POS_MOUSE);

      switch (checker.run()) {
      case RESPONSE_ACCEPT:
            break;
      default:
            return;
      }

      Session::cleanup_report rep;

      editor->prepare_for_cleanup ();

      /* do not allow flush until a session is reloaded */

      Glib::RefPtr<Action> act = ActionManager::get_action (X_("Main"), X_("FlushWastebasket"));
      if (act) {
            act->set_sensitive (false);
      }

      if (session->cleanup_sources (rep)) {
            return;
      }

      checker.hide();
      display_cleanup_results (rep, 
                         _("cleaned files"),
                         _("\
The following %1 %2 not in use and \n\
have been moved to:\n\
%3. \n\n\
Flushing the wastebasket will \n\
release an additional\n\
%4 %5bytes of disk space.\n"
                               ));



}

void
ARDOUR_UI::flush_trash ()
{
      if (session == 0) {
            /* shouldn't happen: menu item is insensitive */
            return;
      }

      Session::cleanup_report rep;

      if (session->cleanup_trash_sources (rep)) {
            return;
      }

      display_cleanup_results (rep, 
                         _("deleted file"),
                         _("The following %1 %2 deleted from\n\
%3,\n\
releasing %4 %5bytes of disk space"));
}

void
ARDOUR_UI::add_route (Gtk::Window* float_window)
{
      int count;

      if (!session) {
            return;
      }

      if (add_route_dialog == 0) {
            add_route_dialog = new AddRouteDialog;
            if (float_window) {
                  add_route_dialog->set_transient_for (*float_window);
            }
      }

      if (add_route_dialog->is_visible()) {
            /* we're already doing this */
            return;
      }

      ResponseType r = (ResponseType) add_route_dialog->run ();
      
      add_route_dialog->hide();

      switch (r) {
      case RESPONSE_ACCEPT:
            break;
      default:
            return;
            break;
      }

      if ((count = add_route_dialog->count()) <= 0) {
            return;
      }

      uint32_t input_chan = add_route_dialog->channels ();
      uint32_t output_chan;
      string name_template = add_route_dialog->name_template ();
      bool track = add_route_dialog->track ();

      AutoConnectOption oac = Config->get_output_auto_connect();

      if (oac & AutoConnectMaster) {
            output_chan = (session->master_out() ? session->master_out()->n_inputs() : input_chan);
      } else {
            output_chan = input_chan;
      }

      /* XXX do something with name template */

      if (track) {
            session_add_audio_track (input_chan, output_chan, add_route_dialog->mode(), count);
      } else {
            session_add_audio_bus (input_chan, output_chan, count);
      }
}

XMLNode*
ARDOUR_UI::mixer_settings () const
{
      XMLNode* node = 0;

      if (session) {
            node = session->instant_xml(X_("Mixer"), session->path());
      } else {
            node = Config->instant_xml(X_("Mixer"), get_user_ardour_path());
      }

      if (!node) {
            node = new XMLNode (X_("Mixer"));
      }

      return node;
}

XMLNode*
ARDOUR_UI::editor_settings () const
{
      XMLNode* node = 0;

      if (session) {
            node = session->instant_xml(X_("Editor"), session->path());
      } else {
            node = Config->instant_xml(X_("Editor"), get_user_ardour_path());
      }

      if (!node) {
            node = new XMLNode (X_("Editor"));
      }
      return node;
}

XMLNode*
ARDOUR_UI::keyboard_settings () const
{
      XMLNode* node = 0;

      node = Config->extra_xml(X_("Keyboard"));
      
      if (!node) {
            node = new XMLNode (X_("Keyboard"));
      }
      return node;
}

void
ARDOUR_UI::halt_on_xrun_message ()
{
      ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::halt_on_xrun_message));

      MessageDialog msg (*editor,
                     _("Recording was stopped because your system could not keep up."));
      msg.run ();
}

void
ARDOUR_UI::disk_overrun_handler ()
{
      ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::disk_overrun_handler));

      if (!have_disk_speed_dialog_displayed) {
            have_disk_speed_dialog_displayed = true;
            MessageDialog* msg = new MessageDialog (*editor, _("\
The disk system on your computer\n\
was not able to keep up with Ardour.\n\
\n\
Specifically, it failed to write data to disk\n\
quickly enough to keep up with recording.\n"));
            msg->signal_response().connect (bind (mem_fun (*this, &ARDOUR_UI::disk_speed_dialog_gone), msg));
            msg->show_all ();
      }
}

void
ARDOUR_UI::disk_underrun_handler ()
{
      ENSURE_GUI_THREAD (mem_fun(*this, &ARDOUR_UI::disk_underrun_handler));

      if (!have_disk_speed_dialog_displayed) {
            have_disk_speed_dialog_displayed = true;
            MessageDialog* msg = new MessageDialog (*editor,
                           _("The disk system on your computer\n\
was not able to keep up with Ardour.\n\
\n\
Specifically, it failed to read data from disk\n\
quickly enough to keep up with playback.\n"));
            msg->signal_response().connect (bind (mem_fun (*this, &ARDOUR_UI::disk_speed_dialog_gone), msg));
            msg->show_all ();
      } 
}

void
ARDOUR_UI::disk_speed_dialog_gone (int ignored_response, MessageDialog* msg)
{
      have_disk_speed_dialog_displayed = false;
      delete msg;
}

int
ARDOUR_UI::pending_state_dialog ()
{
      ArdourDialog dialog ("pending state dialog");
      Label  message (_("\
This session appears to have been in\n\
middle of recording when ardour or\n\
the computer was shutdown.\n\
\n\
Ardour can recover any captured audio for\n\
you, or it can ignore it. Please decide\n\
what you would like to do.\n"));

      dialog.get_vbox()->pack_start (message);
      dialog.add_button (_("Recover from crash"), RESPONSE_ACCEPT);
      dialog.add_button (_("Ignore crash data"), RESPONSE_REJECT);

      dialog.set_position (WIN_POS_CENTER);
      dialog.show_all ();
      
      switch (dialog.run ()) {
      case RESPONSE_ACCEPT:
            return 1;
      default:
            return 0;
      }
}
      
void
ARDOUR_UI::disconnect_from_jack ()
{
      if (engine) {
            if( engine->disconnect_from_jack ()) {
                  MessageDialog msg (*editor, _("Could not disconnect from JACK"));
                  msg.run ();
            }

            update_sample_rate (0);
      }
}

void
ARDOUR_UI::reconnect_to_jack ()
{
      if (engine) {
            if (engine->reconnect_to_jack ()) {
                  MessageDialog msg (*editor,  _("Could not reconnect to JACK"));
                  msg.run ();
            }

            update_sample_rate (0);
      }
}

int
ARDOUR_UI::cmdline_new_session (string path)
{
      if (path[0] != '/') {
            char buf[PATH_MAX+1];
            string str;

            getcwd (buf, sizeof (buf));
            str = buf;
            str += '/';
            str += path;
            path = str;
      }

      new_session (path);

      _will_create_new_session_automatically = false; /* done it */
      return FALSE; /* don't call it again */
}

void
ARDOUR_UI::use_config ()
{
      Glib::RefPtr<Action> act;

      switch (Config->get_native_file_data_format ()) {
      case FormatFloat:
            act = ActionManager::get_action (X_("options"), X_("FileDataFormatFloat"));
            break;
      case FormatInt24:
            act = ActionManager::get_action (X_("options"), X_("FileDataFormat24bit"));
            break;
      case FormatInt16:
            act = ActionManager::get_action (X_("options"), X_("FileDataFormat16bit"));
            break;
      }

      if (act) {
            Glib::RefPtr<RadioAction> ract = Glib::RefPtr<RadioAction>::cast_dynamic(act);
            ract->set_active ();
      }     

      switch (Config->get_native_file_header_format ()) {
      case BWF:
            act = ActionManager::get_action (X_("options"), X_("FileHeaderFormatBWF"));
            break;
      case WAVE:
            act = ActionManager::get_action (X_("options"), X_("FileHeaderFormatWAVE"));
            break;
      case WAVE64:
            act = ActionManager::get_action (X_("options"), X_("FileHeaderFormatWAVE64"));
            break;
      case iXML:
            act = ActionManager::get_action (X_("options"), X_("FileHeaderFormatiXML"));
            break;
      case RF64:
            act = ActionManager::get_action (X_("options"), X_("FileHeaderFormatRF64"));
            break;
      case CAF:
            act = ActionManager::get_action (X_("options"), X_("FileHeaderFormatCAF"));
            break;
      case AIFF:
            act = ActionManager::get_action (X_("options"), X_("FileHeaderFormatAIFF"));
            break;
      }

      if (act) {
            Glib::RefPtr<RadioAction> ract = Glib::RefPtr<RadioAction>::cast_dynamic(act);
            ract->set_active ();
      }     

      XMLNode* node = Config->extra_xml (X_("TransportControllables"));
      if (node) {
            set_transport_controllable_state (*node);
      }
}

void
ARDOUR_UI::update_transport_clocks (nframes_t pos)
{
      if (Config->get_primary_clock_delta_edit_cursor()) {
            primary_clock.set (pos, false, editor->edit_cursor_position(false), 1);
      } else {
            primary_clock.set (pos, 0, true);
      }

      if (Config->get_secondary_clock_delta_edit_cursor()) {
            secondary_clock.set (pos, false, editor->edit_cursor_position(false), 2);
      } else {
            secondary_clock.set (pos);
      }

      if (big_clock_window) {
            big_clock.set (pos);
      }
}

void
ARDOUR_UI::record_state_changed ()
{
      ENSURE_GUI_THREAD (mem_fun (*this, &ARDOUR_UI::record_state_changed));

      if (!session || !big_clock_window) {
            /* why bother - the clock isn't visible */
            return;
      }

      switch (session->record_status()) {
      case Session::Recording:
            big_clock.set_widget_name ("BigClockRecording");
            break;
      default:
            big_clock.set_widget_name ("BigClockNonRecording");
            break;
      }
}

void
ARDOUR_UI::set_keybindings_path (string path)
{
      keybindings_path = path;
}

void
ARDOUR_UI::save_keybindings ()
{
      if (can_save_keybindings) {
            AccelMap::save (user_keybindings_path);
      } 
}

bool
ARDOUR_UI::first_idle ()
{
      if (session) {
            session->allow_auto_play (true);
      }
      can_save_keybindings = true;
      return false;
}

void
ARDOUR_UI::store_clock_modes ()
{
      XMLNode* node = new XMLNode(X_("ClockModes"));

      for (vector<AudioClock*>::iterator x = AudioClock::clocks.begin(); x != AudioClock::clocks.end(); ++x) {
            node->add_property ((*x)->name().c_str(), enum_2_string ((*x)->mode()));
      }

      session->add_extra_xml (*node);
      session->set_dirty ();
}


            
ARDOUR_UI::TransportControllable::TransportControllable (std::string name, ARDOUR_UI& u, ToggleType tp)
      : Controllable (name), ui (u), type(tp)
{
      
}

void
ARDOUR_UI::TransportControllable::set_value (float val)
{
      if (type == ShuttleControl) {
            double fract;

            if (val == 0.5f) {
                  fract = 0.0;
            } else {
                  if (val < 0.5f) {
                        fract = -((0.5f - val)/0.5f);
                  } else {
                        fract = ((val - 0.5f)/0.5f);
                  }
            }
            
            ui.set_shuttle_fract (fract);
            return;
      }

      if (val < 0.5f) {
            /* do nothing: these are radio-style actions */
            return;
      }

      char *action = 0;

      switch (type) {
      case Roll:
            action = X_("Roll");
            break;
      case Stop:
            action = X_("Stop");
            break;
      case GotoStart:
            action = X_("Goto Start");
            break;
      case GotoEnd:
            action = X_("Goto End");
            break;
      case AutoLoop:
            action = X_("Loop");
            break;
      case PlaySelection:
            action = X_("Play Selection");
            break;
      case RecordEnable:
            action = X_("Record");
            break;
      default:
            break;
      }

      if (action == 0) {
            return;
      }

      Glib::RefPtr<Action> act = ActionManager::get_action ("Transport", action);

      if (act) {
            act->activate ();
      }
}

float
ARDOUR_UI::TransportControllable::get_value (void) const
{
      float val = 0.0f;
      
      switch (type) {
      case Roll:
            break;
      case Stop:
            break;
      case GotoStart:
            break;
      case GotoEnd:
            break;
      case AutoLoop:
            break;
      case PlaySelection:
            break;
      case RecordEnable:
            break;
      case ShuttleControl:
            break;
      default:
            break;
      }

      return val;
}

void
ARDOUR_UI::TransportControllable::set_id (const string& str)
{
      _id = str;
}

void
ARDOUR_UI::setup_profile ()
{
      if (gdk_screen_width() < 1200) {
            Profile->set_small_screen ();
      }
}

void
ARDOUR_UI::audioengine_setup ()
{
      EngineDialog ed;
      
      ed.show_all ();
      ed.run ();
}

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