livetrax/gtk2_ardour/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.

*/

#define __STDC_FORMAT_MACROS 1
#include <stdint.h>

#include <algorithm>
#include <cmath>
#include <fcntl.h>
#include <signal.h>
#include <unistd.h>
#include <time.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/basename.h"
#include "pbd/compose.h"
#include "pbd/failed_constructor.h"
#include "pbd/enumwriter.h"
#include "pbd/memento_command.h"
#include "pbd/openuri.h"
#include "pbd/file_utils.h"

#include "gtkmm2ext/application.h"
#include "gtkmm2ext/gtk_ui.h"
#include "gtkmm2ext/utils.h"
#include "gtkmm2ext/click_box.h"
#include "gtkmm2ext/fastmeter.h"
#include "gtkmm2ext/popup.h"
#include "gtkmm2ext/window_title.h"

#include "midi++/manager.h"

#include "ardour/ardour.h"
#include "ardour/callback.h"
#include "ardour/profile.h"
#include "ardour/session_directory.h"
#include "ardour/session_route.h"
#include "ardour/session_state_utils.h"
#include "ardour/session_utils.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 "ardour/midi_track.h"
#include "ardour/filesystem_paths.h"
#include "ardour/filename_extensions.h"

typedef uint64_t microseconds_t;

#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 "about.h"
#include "splash.h"
#include "utils.h"
#include "gui_thread.h"
#include "theme_manager.h"
#include "bundle_manager.h"
#include "session_metadata_dialog.h"
#include "gain_meter.h"
#include "route_time_axis.h"
#include "startup.h"
#include "engine_dialog.h"
#include "processor_box.h"
#include "time_axis_view_item.h"
#include "window_proxy.h"
#include "global_port_matrix.h"
#include "location_ui.h"

#include "i18n.h"

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

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 (PROGRAM_NAME, argcp, argvp),

	  primary_clock (X_("primary"), false, X_("TransportClockDisplay"), true, true, false, true),
	  secondary_clock (X_("secondary"), false, X_("SecondaryClockDisplay"), true, true, false, true),
	  preroll_clock (X_("preroll"), false, X_("PreRollClock"), true, false, true),
	  postroll_clock (X_("postroll"), false, X_("PostRollClock"), true, false, true),

	  /* preroll stuff */

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

	  /* big clock */

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

	  /* transport */

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

{
	using namespace Gtk::Menu_Helpers;

	Gtkmm2ext::init();


#ifdef TOP_MENUBAR
	// _auto_display_errors = false;
	/*
	 * This was commented out as it wasn't defined
	 * in A3 IIRC.  If this is not needed it should
	 * be completely removed.
	 */
#endif

	about = 0;
	splash = 0;
	_startup = 0;

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

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

	editor = 0;
	mixer = 0;
	editor = 0;
	engine = 0;
	_session_is_new = false;
	big_clock_window = 0;
	big_clock_height = 0;
	big_clock_resize_in_progress = false;
	session_selector_window = 0;
	last_key_press_time = 0;
	_will_create_new_session_automatically = false;
	add_route_dialog = 0;
	route_params = 0;
	rc_option_editor = 0;
	session_option_editor = 0;
	location_ui = 0;
	open_session_selector = 0;
	have_configure_timeout = false;
	have_disk_speed_dialog_displayed = false;
	session_loaded = false;
	last_speed_displayed = -1.0f;
	ignore_dual_punch = false;
	_mixer_on_top = false;
        original_big_clock_width = -1;
        original_big_clock_height = -1;
        original_big_clock_font_size = 0;

	roll_button.unset_flags (Gtk::CAN_FOCUS);
	stop_button.unset_flags (Gtk::CAN_FOCUS);
	goto_start_button.unset_flags (Gtk::CAN_FOCUS);
	goto_end_button.unset_flags (Gtk::CAN_FOCUS);
	auto_loop_button.unset_flags (Gtk::CAN_FOCUS);
	play_selection_button.unset_flags (Gtk::CAN_FOCUS);
	rec_button.unset_flags (Gtk::CAN_FOCUS);

	last_configure_time= 0;

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

	shuttle_style_menu = 0;
	shuttle_unit_menu = 0;

        // We do not have jack linked in yet so;

	last_shuttle_request = last_peak_grab = 0; //  get_microseconds();

	ARDOUR::Diskstream::DiskOverrun.connect (forever_connections, MISSING_INVALIDATOR, boost::bind (&ARDOUR_UI::disk_overrun_handler, this), gui_context());
	ARDOUR::Diskstream::DiskUnderrun.connect (forever_connections, MISSING_INVALIDATOR, boost::bind (&ARDOUR_UI::disk_underrun_handler, this), gui_context());

	/* handle dialog requests */

	ARDOUR::Session::Dialog.connect (forever_connections, MISSING_INVALIDATOR, ui_bind (&ARDOUR_UI::session_dialog, this, _1), gui_context());

	/* handle pending state with a dialog (PROBLEM: needs to return a value and thus cannot be x-thread) */

	ARDOUR::Session::AskAboutPendingState.connect_same_thread (forever_connections, boost::bind (&ARDOUR_UI::pending_state_dialog, this));

	/* handle sr mismatch with a dialog (PROBLEM: needs to return a value and thus cannot be x-thread) */

	ARDOUR::Session::AskAboutSampleRateMismatch.connect_same_thread (forever_connections, boost::bind (&ARDOUR_UI::sr_mismatch_dialog, this, _1, _2));

	/* lets get this party started */

	try {
		if (ARDOUR::init (ARDOUR_COMMAND_LINE::use_vst, ARDOUR_COMMAND_LINE::try_hw_optimization)) {
			throw failed_constructor ();
		}

		setup_gtk_ardour_enums ();
		setup_profile ();

		GainMeter::setup_slider_pix ();
		RouteTimeAxisView::setup_slider_pix ();
		SendProcessorEntry::setup_slider_pix ();
		SessionEvent::create_per_thread_pool ("GUI", 512);

	} catch (failed_constructor& err) {
		error << string_compose (_("could not initialize %1."), PROGRAM_NAME) << endmsg;
		// pass it on up
		throw;
	}

	/* we like keyboards */

	keyboard = new ArdourKeyboard(*this);

	XMLNode* node = ARDOUR_UI::instance()->keyboard_settings();
	if (node) {
		keyboard->set_state (*node, Stateful::loading_state_version);
	}

	reset_dpi();

        TimeAxisViewItem::set_constant_heights ();

	/* The following must happen after ARDOUR::init() so that Config is set up */
	
	location_ui = new ActionWindowProxy<LocationUIWindow> (X_("locations"), Config->extra_xml (X_("UI")), X_("ToggleLocations"));
	big_clock_window = new ActionWindowProxy<Gtk::Window> (X_("bigclock"), Config->extra_xml (X_("UI")), X_("ToggleBigClock"));
	
	for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
		_global_port_matrix[*i] = new ActionWindowProxy<GlobalPortMatrixWindow> (
			string_compose ("GlobalPortMatrix-%1", (*i).to_string()),
			Config->extra_xml (X_("UI")),
			string_compose ("toggle-%1-connection-manager", (*i).to_string())
			);
	}

	setup_clock ();

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

	platform_setup ();
}

/** @return true if a session was chosen and `apply' clicked, otherwise false if `cancel' was clicked */
bool
ARDOUR_UI::run_startup (bool should_be_new, string load_template)
{
	delete _startup;
	_startup = new ArdourStartup ();

	XMLNode* audio_setup = Config->extra_xml ("AudioSetup");
	
	if (audio_setup && _startup->engine_control()) {
		_startup->engine_control()->set_state (*audio_setup);
	}

	_startup->set_new_only (should_be_new);
        if (!load_template.empty()) {
            _startup->set_load_template( load_template );
        }
	_startup->present ();

	main().run();

	_startup->hide ();

	switch (_startup->response()) {
	case RESPONSE_OK:
		return true;
	default:
		return false;
	}
}

int
ARDOUR_UI::create_engine ()
{
	// this gets called every time by new_session()

	if (engine) {
		return 0;
	}

	loading_message (_("Starting audio engine"));

	try {
		engine = new ARDOUR::AudioEngine (ARDOUR_COMMAND_LINE::jack_client_name, ARDOUR_COMMAND_LINE::jack_session_uuid);

	} catch (...) {

		return -1;
	}

	engine->Stopped.connect (forever_connections, MISSING_INVALIDATOR, boost::bind (&ARDOUR_UI::engine_stopped, this), gui_context());
	engine->Running.connect (forever_connections, MISSING_INVALIDATOR, boost::bind (&ARDOUR_UI::engine_running, this), gui_context());
	engine->SampleRateChanged.connect (forever_connections, MISSING_INVALIDATOR, ui_bind (&ARDOUR_UI::update_sample_rate, this, _1), gui_context());

	engine->Halted.connect_same_thread (forever_connections, boost::bind (&ARDOUR_UI::engine_halted, this, _1, false));

        ARDOUR::Port::set_connecting_blocked (ARDOUR_COMMAND_LINE::no_connect_ports);

	post_engine ();

	return 0;
}

void
ARDOUR_UI::post_engine ()
{
	/* Things to be done once we create the AudioEngine
	 */

	ARDOUR::init_post_engine ();

	ActionManager::init ();
	_tooltips.enable();

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

	/* this is the first point at which all the keybindings are available */

	if (ARDOUR_COMMAND_LINE::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);
	}

	blink_timeout_tag = -1;

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

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

	/* set default clock modes */

	if (Profile->get_sae()) {
		primary_clock.set_mode (AudioClock::BBT);
		secondary_clock.set_mode (AudioClock::MinSec);
	}  else {
		primary_clock.set_mode (AudioClock::Timecode);
		secondary_clock.set_mode (AudioClock::BBT);
	}

	/* start the time-of-day-clock */

#ifndef GTKOSX
	/* OS X provides a nearly-always visible wallclock, so don't be stupid */
	update_wall_clock ();
	Glib::signal_timeout().connect (sigc::mem_fun(*this, &ARDOUR_UI::update_wall_clock), 60000);
#endif

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

	Config->ParameterChanged.connect (forever_connections, MISSING_INVALIDATOR, ui_bind (&ARDOUR_UI::parameter_changed, this, _1), gui_context());
	boost::function<void (string)> pc (boost::bind (&ARDOUR_UI::parameter_changed, this, _1));
	Config->map_parameters (pc);

	/* now start and maybe save state */

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

ARDOUR_UI::~ARDOUR_UI ()
{
	delete keyboard;
	delete editor;
	delete mixer;
	delete add_route_dialog;
}

void
ARDOUR_UI::pop_back_splash ()
{
	if (Splash::instance()) {
		// Splash::instance()->pop_back();
		Splash::instance()->hide ();
	}
}

gint
ARDOUR_UI::configure_timeout ()
{
	if (last_configure_time == 0) {
		/* no configure events yet */
		return true;
	}

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

	if (get_microseconds() - last_configure_time < 500000) {
		return true;
	} else {
		have_configure_timeout = false;
                cerr << "config event-driven save\n";
		save_ardour_state ();
		return false;
	}
}

gboolean
ARDOUR_UI::configure_handler (GdkEventConfigure* /*conf*/)
{
	if (have_configure_timeout) {
		last_configure_time = get_microseconds();
	} else {
		Glib::signal_timeout().connect (sigc::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;
}


gint
ARDOUR_UI::autosave_session ()
{
	if (g_main_depth() > 1) {
		/* inside a recursive main loop,
		   give up because we may not be able to
		   take a lock.
		*/
		return 1;
	}

        if (!Config->get_periodic_safety_backups()) {
                return 1;
	}

        if (_session) {
                _session->maybe_write_autosave();
        }

	return 1;
}

void
ARDOUR_UI::update_autosave ()
{
	ENSURE_GUI_THREAD (*this, &ARDOUR_UI::update_autosave)

	if (_session && _session->dirty()) {
		if (_autosave_connection.connected()) {
			_autosave_connection.disconnect();
		}

		_autosave_connection = Glib::signal_timeout().connect (sigc::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::backend_audio_error (bool we_set_params, Gtk::Window* toplevel)
{
	string title;
	if (we_set_params) {
		title = string_compose (_("%1 could not start JACK"), PROGRAM_NAME);
	} else {
		title = string_compose (_("%1 could not connect to JACK."), PROGRAM_NAME);
	}

	MessageDialog win (title,
			   false,
			   Gtk::MESSAGE_INFO,
			   Gtk::BUTTONS_NONE);

	if (we_set_params) {
		win.set_secondary_text(_("There are several possible reasons:\n\
\n\
1) You requested audio parameters that are not supported..\n\
2) JACK is running as another user.\n\
\n\
Please consider the possibilities, and perhaps try different parameters."));
	} else {
		win.set_secondary_text(_("There are several possible reasons:\n\
\n\
1) JACK is not running.\n\
2) JACK is running as another user, perhaps root.\n\
3) There is already another client called \"ardour\".\n\
\n\
Please consider the possibilities, and perhaps (re)start JACK."));
	}

	if (toplevel) {
		win.set_transient_for (*toplevel);
	}

	if (we_set_params) {
		win.add_button (Stock::OK, RESPONSE_CLOSE);
	} else {
		win.add_button (Stock::QUIT, RESPONSE_CLOSE);
	}

	win.set_default_response (RESPONSE_CLOSE);

	win.show_all ();
	win.set_position (Gtk::WIN_POS_CENTER);
	pop_back_splash ();

	/* we just don't care about the result, but we want to block */

	win.run ();
}

void
ARDOUR_UI::startup ()
{
        Application* app = Application::instance ();

        app->ShouldQuit.connect (sigc::mem_fun (*this, &ARDOUR_UI::queue_finish));
        app->ShouldLoad.connect (sigc::mem_fun (*this, &ARDOUR_UI::idle_load));

#ifdef PHONE_HOME
        call_the_mothership (VERSIONSTRING);
#endif

        app->ready ();

	if (get_session_parameters (true, ARDOUR_COMMAND_LINE::new_session, ARDOUR_COMMAND_LINE::load_template)) {
		exit (1);
	}

	use_config ();

	goto_editor_window ();

	/* Add the window proxies here; their addition may cause windows to be opened, and we want them
	   to be opened on top of the editor window that goto_editor_window() just opened.
	*/
	add_window_proxy (location_ui);
	add_window_proxy (big_clock_window);
	for (ARDOUR::DataType::iterator i = ARDOUR::DataType::begin(); i != ARDOUR::DataType::end(); ++i) {
		add_window_proxy (_global_port_matrix[*i]);
	}
	
	BootMessage (string_compose (_("%1 is ready for use"), PROGRAM_NAME));
}

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

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"));

	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 (string_compose (_("WARNING: Your system has a limit for maximum amount of locked memory. "
                                                                     "This might cause %1 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"),
                                                                   PROGRAM_NAME).c_str());
                                                   
				VBox* vbox = msg.get_vbox();
				HBox hbox;
				CheckButton cb (_("Do not show this window again"));

				cb.signal_toggled().connect (sigc::mem_fun (*this, &ARDOUR_UI::no_memory_warning));

				hbox.pack_start (cb, true, false);
				vbox->pack_start (hbox);
				cb.show();
				vbox->show();
				hbox.show ();

				pop_back_splash ();

				editor->ensure_float (msg);
				msg.run ();
			}
		}
	}
#endif // !__APPLE__
}


void
ARDOUR_UI::queue_finish ()
{
	Glib::signal_idle().connect (mem_fun (*this, &ARDOUR_UI::idle_finish));
}

bool
ARDOUR_UI::idle_finish ()
{
	finish ();
	return false; /* do not call again */
}

void
ARDOUR_UI::finish()
{
	if (_session) {
                int tries = 0;

		if (_session->transport_rolling() && (++tries < 8)) {
			_session->request_stop (false, true);
			usleep (10000);
		}

		if (_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."));
					pop_back_splash();
					msg.run ();
					return;
				}
				break;
			case 0:
				break;
			}
		}

		second_connection.disconnect ();
		point_one_second_connection.disconnect ();
		point_oh_five_second_connection.disconnect ();
		point_zero_one_second_connection.disconnect();
	}

	/* Save state before deleting the session, as that causes some
	   windows to be destroyed before their visible state can be
	   saved.
	*/
	save_ardour_state ();

	if (_session) {
		// _session->set_deletion_in_progress ();
                _session->set_clean ();
		_session->remove_pending_capture_state ();
		delete _session;
		_session = 0;
	}

	ArdourDialog::close_all_dialogs ();
	engine->stop (true);
	quit ();
}

int
ARDOUR_UI::ask_about_saving_session (const string & what)
{
	ArdourDialog window (_("Unsaved 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);

	dhbox.show();
	prompt_label.show();
	dimage->show();
	window.show();
	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 ()
{
	// august 2007: actual update frequency: 40Hz, not 100Hz

	SuperRapidScreenUpdate(); /* EMIT_SIGNAL */
	return TRUE;
}

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

	ENSURE_GUI_THREAD (*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];
	uint32_t c, p;

	if (_session) {
		c = _session->capture_load ();
		p = _session->playback_load ();

		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->record_enabled()) {
		rec_enabled_streams += track->n_inputs().n_total();
	}
}

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

	nframes_t frames = _session->available_capture_duration();
	char buf[64];
	nframes_t fr = _session->frame_rate();

	if (frames == max_frames) {
		strcpy (buf, _("Disk: 24hrs+"));
	} else {
		rec_enabled_streams = 0;
		_session->foreach_route (this, &ARDOUR_UI::count_recenabled_streams);

		if (rec_enabled_streams) {
			frames /= rec_enabled_streams;
		}

		int hrs;
		int mins;
		int secs;

		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);

	// An attempt to make the disk space label flash red when space has run out.

	if (frames < fr * 60 * 5) {
	/*	disk_space_box.style ("disk_space_label_empty"); */
	} else {
	/*	disk_space_box.style ("disk_space_label"); */
	}

}

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 ()
{
	std::vector<sys::path> session_directories;
	RecentSessionsSorter cmp;

	recent_session_display.set_model (Glib::RefPtr<TreeModel>(0));
	recent_session_model->clear ();

	ARDOUR::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);

	for (ARDOUR::RecentSessions::iterator i = rs.begin(); i != rs.end(); ++i) {
	        session_directories.push_back ((*i).second);
	}

	for (vector<sys::path>::const_iterator i = session_directories.begin();
			i != session_directories.end(); ++i)
	{
		std::vector<sys::path> state_file_paths;

		// now get available states for this session

		get_state_files_in_directory (*i, state_file_paths);

		vector<string*>* states;
		vector<const gchar*> item;
		string fullpath = (*i).to_string();

		/* remove any trailing / */

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

		/* check whether session still exists */
		if (!Glib::file_test(fullpath.c_str(), Glib::FILE_TEST_EXISTS)) {
			/* session doesn't exist */
			cerr << "skipping non-existent session " << fullpath << endl;
			continue;
		}

		/* now get available states for this session */

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

		std::vector<string> state_file_names(get_file_names_no_extension (state_file_paths));

		Gtk::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 (state_file_names.size() > 1) {

			// add the children

			for (std::vector<std::string>::iterator i2 = state_file_names.begin();
					i2 != state_file_names.end(); ++i2)
			{

				Gtk::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;
			}
		}
	}

	recent_session_display.set_model (recent_session_model);
}

void
ARDOUR_UI::build_session_selector ()
{
	session_selector_window = new ArdourDialog (_("Recent Sessions"));

	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_BROWSE);
	recent_session_display.signal_row_activated().connect (sigc::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);

	recent_session_display.show();
	scroller->show();
	//session_selector_window->get_vbox()->show();
}

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

void
ARDOUR_UI::open_recent_session ()
{
	bool can_return = (_session != 0);

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

	redisplay_recent_sessions ();

	while (true) {

		session_selector_window->set_position (WIN_POS_MOUSE);

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

		switch (r) {
		case RESPONSE_ACCEPT:
			break;
		default:
			if (can_return) {
				session_selector_window->hide();
				return;
			} else {
				exit (1);
			}
		}

		if (recent_session_display.get_selection()->count_selected_rows() == 0) {
			continue;
		}

		session_selector_window->hide();

		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;

		if (load_session (path, state) == 0) {
			break;
		}

		can_return = false;
	}
}

bool
ARDOUR_UI::check_audioengine ()
{
	if (engine) {
		if (!engine->connected()) {
			MessageDialog msg (string_compose (_("%1 is not connected to JACK\n"
                                                             "You cannot open or close sessions in this condition"),
                                                           PROGRAM_NAME));
			pop_back_splash ();
			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);
		open_session_selector->set_default_response(Gtk::RESPONSE_ACCEPT);

		FileFilter session_filter;
		session_filter.add_pattern ("*.ardour");
		session_filter.set_name (string_compose (_("%1 sessions"), PROGRAM_NAME));
		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 (ARDOUR::find_session (session_path, path, name, isnew) == 0) {
			_session_is_new = isnew;
			load_session (path, name);
		}
	}
}


void
ARDOUR_UI::session_add_midi_route (bool disk, RouteGroup* route_group, uint32_t how_many)
{
	list<boost::shared_ptr<MidiTrack> > tracks;

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

	try {
		if (disk) {

			tracks = _session->new_midi_track (ARDOUR::Normal, route_group, how_many);

			if (tracks.size() != how_many) {
				if (how_many == 1) {
					error << _("could not create a new midi track") << endmsg;
				} else {
					error << string_compose (_("could not create %1 new midi tracks"), how_many) << endmsg;
				}
			}
		} /*else {
			if ((route = _session->new_midi_route ()) == 0) {
				error << _("could not create new midi bus") << endmsg;
			}
		}*/
	}

	catch (...) {
		MessageDialog msg (*editor,
				   string_compose (_("There are insufficient JACK ports available\n\
to create a new track or bus.\n\
You should save %1, exit and\n\
restart JACK with more ports."), PROGRAM_NAME));
		msg.run ();
	}
}


void
ARDOUR_UI::session_add_audio_route (bool track, bool aux, int32_t input_channels, int32_t output_channels, ARDOUR::TrackMode mode, RouteGroup* route_group, uint32_t how_many)
{
	list<boost::shared_ptr<AudioTrack> > tracks;
	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, route_group, 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 (aux, input_channels, output_channels, route_group, 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;
				}
			}
		}
	}

	catch (...) {
		MessageDialog msg (*editor,
				   string_compose (_("There are insufficient JACK ports available\n\
to create a new track or bus.\n\
You should save %1, exit and\n\
restart JACK with more ports."), PROGRAM_NAME));
		pop_back_splash ();
		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->center_screen (_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_wallclock ()
{
	if (_session && editor) {

		time_t now;
		struct tm tmnow;
		nframes64_t frames;

		time (&now);
		localtime_r (&now, &tmnow);

		frames = tmnow.tm_hour * (60 * 60 * _session->frame_rate());
		frames += tmnow.tm_min * (60 * _session->frame_rate());
		frames += tmnow.tm_sec * _session->frame_rate();

		_session->request_locate (frames, _session->transport_rolling ());

		/* force displayed area in editor to start no matter
		   what "follow playhead" setting is.
		*/

		if (editor) {
			editor->center_screen (frames);
		}
	}
}

void
ARDOUR_UI::transport_goto_end ()
{
	if (_session) {
		nframes_t const 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->center_screen (frame);
		}
	}
}

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

	if (_session->is_auditioning()) {
		_session->cancel_audition ();
		return;
	}

	_session->request_stop (false, true);
}

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

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

void
ARDOUR_UI::transport_record (bool roll)
{

	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 ();
			if (roll) {
				transport_roll ();
			}
			break;
		case Session::Recording:
			if (roll) {
				_session->request_stop();
			} else {
				_session->disable_record (false, true);
			}
			break;

		case Session::Enabled:
			_session->disable_record (false, true);
		}
	}
	//cerr << "ARDOUR_UI::transport_record () called roll = " << roll << " _session->record_status() = " << _session->record_status() << endl;
}

void 
ARDOUR_UI::transport_roll ()
{
	if (!_session) {
		return;
	}

	if (_session->is_auditioning()) {
		return;
	}
	
	if (_session->config.get_external_sync()) {
		switch (_session->config.get_sync_source()) {
		case JACK:
			break;
		default:
			/* transport controlled by the master */
			return;
		}
	}

	bool rolling = _session->transport_rolling();

	if (_session->get_play_loop()) {
		/* XXX it is not possible to just leave seamless loop and keep
		   playing at present (nov 4th 2009)
		*/
                if (!Config->get_seamless_loop()) {
                        _session->request_play_loop (false, true);
                }
	} else if (_session->get_play_range () && !join_play_range_button.get_active()) {
		/* stop playing a range if we currently are */
		_session->request_play_range (0, true);
	}

	if (join_play_range_button.get_active()) {
		_session->request_play_range (&editor->get_selection().time, true);
	}

	if (!rolling) {
		_session->request_transport_speed (1.0f);
	}
}

void
ARDOUR_UI::toggle_roll (bool with_abort, bool roll_out_of_bounded_mode)
{
	
	if (!_session) {
		return;
	}

	if (_session->is_auditioning()) {
		_session->cancel_audition ();
		return;
	}

	if (_session->config.get_external_sync()) {
		switch (_session->config.get_sync_source()) {
		case JACK:
			break;
		default:
			/* transport controlled by the master */
			return;
		}
	}

	bool rolling = _session->transport_rolling();
	bool affect_transport = true;

	if (rolling && roll_out_of_bounded_mode) {
		/* drop out of loop/range playback but leave transport rolling */
		if (_session->get_play_loop()) {
			if (Config->get_seamless_loop()) {
				/* the disk buffers contain copies of the loop - we can't 
				   just keep playing, so stop the transport. the user
				   can restart as they wish.
				*/
				affect_transport = true;
			} else {
				/* disk buffers are normal, so we can keep playing */
				affect_transport = false;
			}
			_session->request_play_loop (false, true);
		} else if (_session->get_play_range ()) {
			affect_transport = false;
                        _session->request_play_range (0, true);
		} 
	} 

	if (affect_transport) {
		if (rolling) {
			_session->request_stop (with_abort, true);
		} else {
			if (join_play_range_button.get_active()) {
				_session->request_play_range (&editor->get_selection().time, true);
			}
			
			_session->request_transport_speed (1.0f);
		}
	}
}

void
ARDOUR_UI::toggle_session_auto_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 (false);
			}
		} else {
			Location * looploc = _session->locations()->auto_loop_location();
			if (looploc) {
				_session->request_play_loop (true);
			}
		}
	}
}

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

	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 rid)
{
	if (_session == 0) {
		return;
	}

	boost::shared_ptr<Route> r;

	if ((r = _session->route_by_remote_id (rid)) != 0) {

		Track* t;

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

void
ARDOUR_UI::map_transport_state ()
{
	ENSURE_GUI_THREAD (*this, &ARDOUR_UI::map_transport_state)

	if (!_session) {
		auto_loop_button.set_visual_state (0);
		play_selection_button.set_visual_state (0);
		roll_button.set_visual_state (0);
		stop_button.set_visual_state (1);
		return;
	}

	float sp = _session->transport_speed();

	if (sp == 1.0f) {
		shuttle_fract = SHUTTLE_FRACT_SPEED1;  /* speed = 1.0, believe it or not */
		shuttle_box.queue_draw ();
	} else if (sp == 0.0f) {
		shuttle_fract = 0;
		shuttle_box.queue_draw ();
		update_disk_space ();
	}

	if (sp != 0.0) {

		/* we're rolling */

		if (_session->get_play_range()) {

			play_selection_button.set_visual_state (1);
			roll_button.set_visual_state (0);
			auto_loop_button.set_visual_state (0);

		} else if (_session->get_play_loop ()) {
			
			auto_loop_button.set_visual_state (1);
			play_selection_button.set_visual_state (0);
			roll_button.set_visual_state (0);

		} else {
			
			roll_button.set_visual_state (1);
			play_selection_button.set_visual_state (0);
			auto_loop_button.set_visual_state (0);
		}

		if (join_play_range_button.get_active()) {
			/* light up both roll and play-selection if they are joined */
			roll_button.set_visual_state (1);
			play_selection_button.set_visual_state (1);
		}

		stop_button.set_visual_state (0);

	} else {

		stop_button.set_visual_state (1);
		roll_button.set_visual_state (0);
		play_selection_button.set_visual_state (0);
		auto_loop_button.set_visual_state (0);
	}
}

void
ARDOUR_UI::engine_stopped ()
{
	ENSURE_GUI_THREAD (*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 (*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;
	const 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 (const char* reason, bool free_reason)
{
       if (!Gtkmm2ext::UI::instance()->caller_is_ui_thread()) {
               /* we can't rely on the original string continuing to exist when we are called
                  again in the GUI thread, so make a copy and note that we need to
                  free it later.
               */
               char *copy = strdup (reason);
               Gtkmm2ext::UI::instance()->call_slot (invalidator (*this), boost::bind (&ARDOUR_UI::engine_halted, this, copy, true));
               return;
       }

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

	update_sample_rate (0);

        string msgstr;

	/* if the reason is a non-empty string, it means that the backend was shutdown
	   rather than just Ardour.
	*/

	if (strlen (reason)) {
		msgstr = string_compose (_("The audio backend (JACK) was shutdown because:\n\n%1"), reason);
	} else {
		msgstr = string_compose (_("\
JACK has either been shutdown or it\n\
disconnected %1 because %1\n\
was not fast enough. Try to restart\n\
JACK, reconnect and save the session."), PROGRAM_NAME);
	}

	MessageDialog msg (*editor, msgstr);
	pop_back_splash ();
	msg.run ();

        if (free_reason) {
                free ((char*) reason);
        }
}

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();
}

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

void
ARDOUR_UI::start_clocking ()
{
	clock_signal_connection = RapidScreenUpdate.connect (sigc::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;
	}
}


/** Ask the user for the name of a new shapshot and then take it.
 */

void
ARDOUR_UI::snapshot_session (bool switch_to_it)
{
	ArdourPrompter prompter (true);
	string snapname;

	prompter.set_name ("Prompter");
	prompter.add_button (Gtk::Stock::SAVE, Gtk::RESPONSE_ACCEPT);
	prompter.set_title (_("Take Snapshot"));
	prompter.set_title (_("Take Snapshot"));
	prompter.set_prompt (_("Name of new snapshot"));

        if (!switch_to_it) {
                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_initial_text (timebuf);
        }

  again:
	switch (prompter.run()) {
	case RESPONSE_ACCEPT:
	{
		prompter.get_result (snapname);

		bool do_save = (snapname.length() != 0);

                if (do_save) {
                        if (snapname.find ('/') != string::npos) {
                                MessageDialog msg (_("To ensure compatibility with various systems\n"
                                                     "snapshot names may not contain a '/' character"));
                                msg.run ();
                                goto again;
                        }
                        if (snapname.find ('\\') != string::npos) {
                                MessageDialog msg (_("To ensure compatibility with various systems\n"
                                                     "snapshot names may not contain a '\\' character"));
                                msg.run ();
                                goto again;
                        }
                }

		vector<sys::path> p;
		get_state_files_in_directory (_session->session_directory().root_path(), p);
		vector<string> n = get_file_names_no_extension (p);
		if (find (n.begin(), n.end(), snapname) != n.end()) {

			ArdourDialog confirm (_("Confirm Snapshot Overwrite"), true);
			Label m (_("A snapshot already exists with that name.  Do you want to overwrite it?"));
			confirm.get_vbox()->pack_start (m, true, true);
			confirm.add_button (Gtk::Stock::CANCEL, Gtk::RESPONSE_CANCEL);
			confirm.add_button (_("Overwrite"), Gtk::RESPONSE_ACCEPT);
			confirm.show_all ();
			switch (confirm.run()) {
			case RESPONSE_CANCEL:
				do_save = false;
			}
		}

		if (do_save) {
			save_state (snapname, switch_to_it);
		}
		break;
	}

	default:
		break;
	}
}

void
ARDOUR_UI::save_state (const string & name, bool switch_to_it)
{
	XMLNode* node = new XMLNode (X_("UI"));

	for (list<WindowProxyBase*>::iterator i = _window_proxies.begin(); i != _window_proxies.end(); ++i) {
		if (!(*i)->rc_configured()) {
			node->add_child_nocopy (*((*i)->get_state ()));
		}
	}

	_session->add_extra_xml (*node);
	
	save_state_canfail (name, switch_to_it);
}

int
ARDOUR_UI::save_state_canfail (string name, bool switch_to_it)
{
	if (_session) {
		int ret;

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

		if ((ret = _session->save_state (name, false, switch_to_it)) != 0) {
			return ret;
		}
	}
        cerr << "SS canfail\n";
	save_ardour_state (); /* XXX cannot fail? yeah, right ... */
	return 0;
}

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

void
ARDOUR_UI::big_clock_value_changed ()
{
	if (_session) {
		_session->request_locate (big_clock.current_time ());
	}
}

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

void
ARDOUR_UI::transport_rec_enable_blink (bool onoff)
{
	if (_session == 0) {
		return;
	}

        if (_session->step_editing()) {
                return;
        }

	Session::RecordState const r = _session->record_status ();
	bool const h = _session->have_rec_enabled_track ();

	if (r == Session::Enabled || (r == Session::Recording && !h)) {
		if (onoff) {
			rec_button.set_visual_state (2);
		} else {
			rec_button.set_visual_state (0);
		}
	} else if (r == Session::Recording && h) {
		rec_button.set_visual_state (1);
	} else {
		rec_button.set_visual_state (0);
	}
}

void
ARDOUR_UI::save_template ()
{
	ArdourPrompter prompter (true);
	string name;

	if (!check_audioengine()) {
		return;
	}

	prompter.set_name (X_("Prompter"));
	prompter.set_title (_("Save Mix Template"));
	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;
	}
}

void
ARDOUR_UI::edit_metadata ()
{
	SessionMetadataEditor dialog;
	dialog.set_session (_session);
	editor->ensure_float (dialog);
	dialog.run ();
}

void
ARDOUR_UI::import_metadata ()
{
	SessionMetadataImporter dialog;
	dialog.set_session (_session);
	editor->ensure_float (dialog);
	dialog.run ();
}

void
ARDOUR_UI::fontconfig_dialog ()
{
#ifdef GTKOSX
	/* X11 users will always have fontconfig info around, but new GTK-OSX users
	   may not and it can take a while to build it. Warn them.
	*/

	Glib::ustring fontconfig = Glib::build_filename (Glib::get_home_dir(), ".fontconfig");

	if (!Glib::file_test (fontconfig, Glib::FILE_TEST_EXISTS|Glib::FILE_TEST_IS_DIR)) {
		MessageDialog msg (*_startup,
				   string_compose (_("Welcome to %1.\n\n"
                                                     "The program will take a bit longer to start up\n"
                                                     "while the system fonts are checked.\n\n"
                                                     "This will only be done once, and you will\n"
                                                     "not see this message again\n"), PROGRAM_NAME),
                                   true,
				   Gtk::MESSAGE_INFO,
				   Gtk::BUTTONS_OK);
		pop_back_splash ();
		msg.show_all ();
		msg.present ();
		msg.run ();
	}
#endif
}

void
ARDOUR_UI::parse_cmdline_path (const Glib::ustring& cmdline_path, Glib::ustring& session_name, Glib::ustring& session_path, bool& existing_session)
{
	existing_session = false;

	if (Glib::file_test (cmdline_path, Glib::FILE_TEST_IS_DIR)) {
		session_path = cmdline_path;
		existing_session = true;
	} else if (Glib::file_test (cmdline_path, Glib::FILE_TEST_IS_REGULAR)) {
		session_path = Glib::path_get_dirname (string (cmdline_path));
		existing_session = true;
	} else {
		/* it doesn't exist, assume the best */
		session_path = Glib::path_get_dirname (string (cmdline_path));
	}

	session_name = basename_nosuffix (string (cmdline_path));
}

int
ARDOUR_UI::load_cmdline_session (const Glib::ustring& session_name, const Glib::ustring& session_path, bool& existing_session)
{
	/* when this is called, the backend audio system must be running */

	/* the main idea here is to deal with the fact that a cmdline argument for the session
	   can be interpreted in different ways - it could be a directory or a file, and before
	   we load, we need to know both the session directory and the snapshot (statefile) within it
	   that we are supposed to use.
	*/

	if (session_name.length() == 0 || session_path.length() == 0) {
		return false;
	}

	if (Glib::file_test (session_path, Glib::FILE_TEST_IS_DIR)) {

		Glib::ustring predicted_session_file;

		predicted_session_file = session_path;
		predicted_session_file += '/';
		predicted_session_file += session_name;
		predicted_session_file += ARDOUR::statefile_suffix;

		if (Glib::file_test (predicted_session_file, Glib::FILE_TEST_EXISTS)) {
			existing_session = true;
		}

	} else if (Glib::file_test (session_path, Glib::FILE_TEST_EXISTS)) {

		if (session_path.find (ARDOUR::statefile_suffix) == session_path.length() - 7) {
			/* existing .ardour file */
			existing_session = true;
		}

	} else {
		existing_session = false;
	}

	/* lets just try to load it */

	if (create_engine ()) {
		backend_audio_error (false, _startup);
		return -1;
	}

	return load_session (session_path, session_name);
}

bool
ARDOUR_UI::ask_about_loading_existing_session (const Glib::ustring& session_path)
{
	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_("OpenExistingDialog"));
	msg.set_title (_("Open Existing Session"));
	msg.set_wmclass (X_("existing_session"), PROGRAM_NAME);
	msg.set_position (Gtk::WIN_POS_MOUSE);
	pop_back_splash ();

	switch (msg.run()) {
	case RESPONSE_YES:
		return true;
		break;
	}
	return false;
}

int
ARDOUR_UI::build_session_from_nsd (const Glib::ustring& session_path, const Glib::ustring& session_name)
{
        BusProfile bus_profile;

	if (Profile->get_sae()) {

		bus_profile.master_out_channels = 2;
		bus_profile.input_ac = AutoConnectPhysical;
		bus_profile.output_ac = AutoConnectMaster;
		bus_profile.requested_physical_in = 0; // use all available
		bus_profile.requested_physical_out = 0; // use all available

	} else {

		/* get settings from advanced section of NSD */

		if (_startup->create_master_bus()) {
			bus_profile.master_out_channels = (uint32_t) _startup->master_channel_count();
		} else {
			bus_profile.master_out_channels = 0;
		}

		if (_startup->connect_inputs()) {
			bus_profile.input_ac = AutoConnectPhysical;
		} else {
			bus_profile.input_ac = AutoConnectOption (0);
		}

		/// @todo some minor tweaks.
                
		bus_profile.output_ac = AutoConnectOption (0);

		if (_startup->connect_outputs ()) {
			if (_startup->connect_outs_to_master()) {
				bus_profile.output_ac = AutoConnectMaster;
			} else if (_startup->connect_outs_to_physical()) {
				bus_profile.output_ac = AutoConnectPhysical;
			}
		}

		bus_profile.requested_physical_in = (uint32_t) _startup->input_limit_count();
		bus_profile.requested_physical_out = (uint32_t) _startup->output_limit_count();
	}

	if (build_session (session_path, session_name, bus_profile)) {
		return -1;
	}

	return 0;
}

void
ARDOUR_UI::idle_load (const Glib::ustring& path)
{
	if (_session) {
		if (Glib::file_test (path, Glib::FILE_TEST_IS_DIR)) {
			/* /path/to/foo => /path/to/foo, foo */
			load_session (path, basename_nosuffix (path));
		} else {
			/* /path/to/foo/foo.ardour => /path/to/foo, foo */
			load_session (Glib::path_get_dirname (path), basename_nosuffix (path));
		}
	} else {

		ARDOUR_COMMAND_LINE::session_name = path;

		/*
		 * new_session_dialog doens't exist in A3
		 * Try to remove all references to it to
		 * see if it will compile.  NOTE: this will
		 * likely cause a runtime issue is my somewhat
		 * uneducated guess.
		 */

		//if (new_session_dialog) {


			/* make it break out of Dialog::run() and
			   start again.
			 */

			//new_session_dialog->response (1);
		//}
	}
}

void
ARDOUR_UI::end_loading_messages ()
{
	// hide_splash ();
}

void
ARDOUR_UI::loading_message (const std::string& /*msg*/)
{
	// show_splash ();
	// splash->message (msg);
	flush_pending ();
}

/** @param quit_on_cancel true if exit() should be called if the user clicks `cancel' in the new session dialog */
int
ARDOUR_UI::get_session_parameters (bool quit_on_cancel, bool should_be_new, string load_template)
{
	Glib::ustring session_name;
	Glib::ustring session_path;
	Glib::ustring template_name;
	int ret = -1;
	bool likely_new = false;

        if (! load_template.empty()) {
            should_be_new = true;
            template_name = load_template;
        }

	while (ret != 0) {

		if (!should_be_new && !ARDOUR_COMMAND_LINE::session_name.empty()) {

			/* if they named a specific statefile, use it, otherwise they are
			   just giving a session folder, and we want to use it as is
			   to find the session.
			*/

			if (ARDOUR_COMMAND_LINE::session_name.find (statefile_suffix) != string::npos) {
				session_path = Glib::path_get_dirname (ARDOUR_COMMAND_LINE::session_name);
			} else {
				session_path = ARDOUR_COMMAND_LINE::session_name;
			}

			session_name = Glib::path_get_basename (ARDOUR_COMMAND_LINE::session_name);

		} else {

			bool const apply = run_startup (should_be_new, load_template);
			if (!apply) {
				if (quit_on_cancel) {
					exit (1);
				} else {
					return ret;
				}
			}

			/* if we run the startup dialog again, offer more than just "new session" */

			should_be_new = false;

			session_name = _startup->session_name (likely_new);

			/* this shouldn't happen, but we catch it just in case it does */

			if (session_name.empty()) {
				break;
			}
			if (_startup->use_session_template()) {
				template_name = _startup->session_template_name();
				_session_is_new = true;
			}

			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] == '/')) {

                                /* absolute path or cwd-relative path specified for session name: infer session folder
                                   from what was given.
                                */
                                
				session_path = Glib::path_get_dirname (session_name);
				session_name = Glib::path_get_basename (session_name);

			} else {

				session_path = _startup->session_folder();
			}
		}

		if (create_engine ()) {
			break;
		}

		if (Glib::file_test (session_path, Glib::FileTest (G_FILE_TEST_EXISTS | G_FILE_TEST_IS_DIR))) {

			if (likely_new) {

				Glib::ustring existing = Glib::build_filename (session_path, session_name);

				if (!ask_about_loading_existing_session (existing)) {
					ARDOUR_COMMAND_LINE::session_name = ""; // cancel that
					continue;
				}
			}

			_session_is_new = false;

		} else {

			if (!likely_new) {
				MessageDialog msg (string_compose (_("There is no existing session at \"%1\""), session_path));
				msg.run ();
				ARDOUR_COMMAND_LINE::session_name = ""; // cancel that
				continue;
			}

                        if (session_name.find ('/') != Glib::ustring::npos) {
                                MessageDialog msg (*_startup, _("To ensure compatibility with various systems\n"
                                                                          "session names may not contain a '/' character"));
                                msg.run ();
				ARDOUR_COMMAND_LINE::session_name = ""; // cancel that
                                continue;
                        }

                        if (session_name.find ('\\') != Glib::ustring::npos) {
                                MessageDialog msg (*_startup, _("To ensure compatibility with various systems\n"
                                                                          "session names may not contain a '\\' character"));
                                msg.run ();
				ARDOUR_COMMAND_LINE::session_name = ""; // cancel that
                                continue;
                        }

			_session_is_new = true;
		}

		if (likely_new && template_name.empty()) {

			ret = build_session_from_nsd (session_path, session_name);

		} else {

			ret = load_session (session_path, session_name, template_name);
			if (!ARDOUR_COMMAND_LINE::immediate_save.empty()) {
				_session->save_state (ARDOUR_COMMAND_LINE::immediate_save, false);
				exit (1);
			}
		}
	}

	return ret;
}

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

	if (unload_session (true)) {
                return;
        }

	ARDOUR_COMMAND_LINE::session_name = "";

	if (get_session_parameters (true, false)) {
		exit (1);
	}

	goto_editor_window ();
}

int
ARDOUR_UI::load_session (const Glib::ustring& path, const Glib::ustring& snap_name, Glib::ustring mix_template)
{
	Session *new_session;
	int unload_status;
	int retval = -1;

	session_loaded = false;

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

	unload_status = unload_session ();

	if (unload_status < 0) {
		goto out;
	} else if (unload_status > 0) {
		retval = 0;
		goto out;
	}

	loading_message (string_compose (_("Please wait while %1loads your session"), PROGRAM_NAME));

	try {
		new_session = new Session (*engine, path, snap_name, 0, mix_template);
	}

	/* this one is special */

	catch (AudioEngine::PortRegistrationFailure& err) {

		MessageDialog msg (err.what(),
				   true,
				   Gtk::MESSAGE_INFO,
				   Gtk::BUTTONS_CLOSE);

		msg.set_title (_("Port Registration Error"));
		msg.set_secondary_text (_("Click the Close button to try again."));
		msg.set_position (Gtk::WIN_POS_CENTER);
		pop_back_splash ();
		msg.present ();

		int response = msg.run ();

		msg.hide ();

		switch (response) {
		case RESPONSE_CANCEL:
			exit (1);
		default:
			break;
		}
		goto out;
	}

	catch (...) {

		MessageDialog msg (string_compose(_("Session \"%1 (snapshot %2)\" did not load successfully"), path, snap_name),
				   true,
				   Gtk::MESSAGE_INFO,
				   Gtk::BUTTONS_CLOSE);

		msg.set_title (_("Loading Error"));
		msg.set_secondary_text (_("Click the Close button to try again."));
		msg.set_position (Gtk::WIN_POS_CENTER);
		pop_back_splash ();
		msg.present ();

		int response = msg.run ();

		msg.hide ();

		switch (response) {
		case RESPONSE_CANCEL:
			exit (1);
		default:
			break;
		}
		goto out;
	}

	/* Now the session been created, add the transport controls */
	new_session->add_controllable(roll_controllable);
	new_session->add_controllable(stop_controllable);
	new_session->add_controllable(goto_start_controllable);
	new_session->add_controllable(goto_end_controllable);
	new_session->add_controllable(auto_loop_controllable);
	new_session->add_controllable(play_selection_controllable);
	new_session->add_controllable(rec_controllable);

	set_session (new_session);

	session_loaded = true;

	goto_editor_window ();

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

	flush_pending ();
	retval = 0;

  out:
	return retval;
}

int
ARDOUR_UI::build_session (const Glib::ustring& path, const Glib::ustring& snap_name, BusProfile& bus_profile)
{
	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, &bus_profile);
	}

	catch (...) {

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

	set_session (new_session);

	session_loaded = true;

	new_session->save_state(new_session->name());

	return 0;
}

void
ARDOUR_UI::launch_chat ()
{
#ifdef __APPLE__
        open_uri("http://webchat.freenode.net/?channels=ardour-osx");
#else
        open_uri("http://webchat.freenode.net/?channels=ardour");
#endif
}

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

        about->set_transient_for(*editor);
	about->show_all ();
}

void
ARDOUR_UI::launch_manual ()
{
	PBD::open_uri("http://ardour.org/flossmanual");
}

void
ARDOUR_UI::launch_reference ()
{
	PBD::open_uri("http://ardour.org/refmanual");
}

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

void
ARDOUR_UI::about_signal_response (int /*response*/)
{
	hide_about();
}

void
ARDOUR_UI::show_splash ()
{
	if (splash == 0) {
		try {
			splash = new Splash;
		} catch (...) {
			return;
		}
	}

	splash->show ();
	splash->present ();
	splash->queue_draw ();
	splash->get_window()->process_updates (true);
	flush_pending ();
}

void
ARDOUR_UI::hide_splash ()
{
	if (splash) {
		splash->hide();
	}
}

void
ARDOUR_UI::display_cleanup_results (ARDOUR::CleanupReport& rep, const gchar* list_title,
				    const string& plural_msg, const string& singular_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 (_("Clean-up"), 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);

	const string dead_sound_directory = _session->session_directory().dead_sound_path().to_string();

	/* subst:
	   %1 - number of files removed
	   %2 - location of "dead_sounds"
	   %3 - size of files affected
	   %4 - prefix for "bytes" to produce sensible results (e.g. mega, kilo, giga)
	*/

	const char* bprefix;
        double space_adjusted = 0;

	if (rep.space < 100000.0f) {
		bprefix = X_("kilo");
	} else if (rep.space < 1000000.0f * 1000) {
		bprefix = X_("mega");
                space_adjusted = truncf((float)rep.space / 1000.0);
	} else {
		bprefix = X_("giga");
                space_adjusted = truncf((float)rep.space / (1000000.0 * 1000));
	}

	if (removed > 1) {
                txt.set_text (string_compose (plural_msg, removed, _session->path() + "dead_sounds", space_adjusted, bprefix));
	} else {
                txt.set_text (string_compose (singular_msg, removed, _session->path() + "dead_sounds", space_adjusted, bprefix));
	}

	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_display.show();
	list_scroller.show();
	txt.show();
	dvbox.show();
	dhbox.show();
	ddhbox.show();
	dimage->show();

	//results.get_vbox()->show();
	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"), PROGRAM_NAME);
	checker.set_position (Gtk::WIN_POS_MOUSE);

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

	ARDOUR::CleanupReport 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)) {
		editor->finish_cleanup ();
		return;
	}

	editor->finish_cleanup ();

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

}

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

	ARDOUR::CleanupReport rep;

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

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

	string template_path = add_route_dialog->track_template();

	if (!template_path.empty()) {
		_session->new_route_from_template (count, template_path);
		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 ();
	bool aux = !track && add_route_dialog->aux();
	RouteGroup* route_group = add_route_dialog->route_group ();

	AutoConnectOption oac = Config->get_output_auto_connect();

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

	/* XXX do something with name template */

	if (add_route_dialog->type() == ARDOUR::DataType::MIDI) {
		if (track) {
			session_add_midi_track (route_group, count);
		} else  {
			MessageDialog msg (*editor,
					_("Sorry, MIDI Busses are not supported at this time."));
			msg.run ();
			//session_add_midi_bus();
		}
	} else {
		if (track) {
			session_add_audio_track (input_chan, output_chan, add_route_dialog->mode(), route_group, count);
		} else {
			session_add_audio_bus (aux, input_chan, output_chan, route_group, count);
		}
	}
}

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

	if (_session) {
		node = _session->instant_xml(X_("Mixer"));
	} else {
		node = Config->instant_xml(X_("Mixer"));
	}

	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"));
	} else {
		node = Config->instant_xml(X_("Editor"));
	}

	if (!node) {
		if (getenv("ARDOUR_INSTANT_XML_PATH")) {
			node = Config->instant_xml(getenv("ARDOUR_INSTANT_XML_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::create_xrun_marker(nframes_t where)
{
	editor->mouse_add_new_marker (where, false, true);
}

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

void
ARDOUR_UI::xrun_handler(nframes_t where)
{
	if (!_session) {
		return;
	}

	ENSURE_GUI_THREAD (*this, &ARDOUR_UI::xrun_handler, where)

	if (_session && Config->get_create_xrun_marker() && _session->actively_recording()) {
		create_xrun_marker(where);
	}

	if (_session && Config->get_stop_recording_on_xrun() && _session->actively_recording()) {
		halt_on_xrun_message ();
	}
}

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

	if (!have_disk_speed_dialog_displayed) {
		have_disk_speed_dialog_displayed = true;
		MessageDialog* msg = new MessageDialog (*editor, string_compose (_("\
The disk system on your computer\n\
was not able to keep up with %1.\n\
\n\
Specifically, it failed to write data to disk\n\
quickly enough to keep up with recording.\n"), PROGRAM_NAME));
		msg->signal_response().connect (sigc::bind (sigc::mem_fun (*this, &ARDOUR_UI::disk_speed_dialog_gone), msg));
		msg->show ();
	}
}

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

	if (!have_disk_speed_dialog_displayed) {
		have_disk_speed_dialog_displayed = true;
		MessageDialog* msg = new MessageDialog (*editor,
                                                        string_compose (_("The disk system on your computer\n\
was not able to keep up with %1.\n\
\n\
Specifically, it failed to read data from disk\n\
quickly enough to keep up with playback.\n"), PROGRAM_NAME));
		msg->signal_response().connect (sigc::bind (sigc::mem_fun (*this, &ARDOUR_UI::disk_speed_dialog_gone), msg));
		msg->show ();
	}
}

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

void
ARDOUR_UI::session_dialog (std::string msg)
{
	ENSURE_GUI_THREAD (*this, &ARDOUR_UI::session_dialog, msg)

	MessageDialog* d;

	if (editor) {
		d = new MessageDialog (*editor, msg, false, MESSAGE_INFO, BUTTONS_OK, true);
	} else {
		d = new MessageDialog (msg, false, MESSAGE_INFO, BUTTONS_OK, true);
	}

	d->show_all ();
	d->run ();
	delete d;
}

int
ARDOUR_UI::pending_state_dialog ()
{
 	HBox* hbox = new HBox();
	Image* image = new Image (Stock::DIALOG_QUESTION, ICON_SIZE_DIALOG);
	ArdourDialog dialog (_("Crash Recovery"), true);
	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"));
	image->set_alignment(ALIGN_CENTER, ALIGN_TOP);
	hbox->pack_start (*image, PACK_EXPAND_WIDGET, 12);
	hbox->pack_end (message, PACK_EXPAND_PADDING, 12);
	dialog.get_vbox()->pack_start(*hbox, PACK_EXPAND_PADDING, 6);
	dialog.add_button (_("Ignore crash data"), RESPONSE_REJECT);
	dialog.add_button (_("Recover from crash"), RESPONSE_ACCEPT);
	dialog.set_default_response (RESPONSE_ACCEPT);
	dialog.set_position (WIN_POS_CENTER);
	message.show();
	image->show();
	hbox->show();

	switch (dialog.run ()) {
	case RESPONSE_ACCEPT:
		return 1;
	default:
		return 0;
	}
}

int
ARDOUR_UI::sr_mismatch_dialog (nframes_t desired, nframes_t actual)
{
 	HBox* hbox = new HBox();
	Image* image = new Image (Stock::DIALOG_QUESTION, ICON_SIZE_DIALOG);
	ArdourDialog dialog (_("Sample Rate Mismatch"), true);
	Label  message (string_compose (_("\
This session was created with a sample rate of %1 Hz\n\
\n\
The audioengine is currently running at %2 Hz\n"), desired, actual));

	image->set_alignment(ALIGN_CENTER, ALIGN_TOP);
	hbox->pack_start (*image, PACK_EXPAND_WIDGET, 12);
	hbox->pack_end (message, PACK_EXPAND_PADDING, 12);
	dialog.get_vbox()->pack_start(*hbox, PACK_EXPAND_PADDING, 6);
	dialog.add_button (_("Do not load session"), RESPONSE_REJECT);
	dialog.add_button (_("Load session anyway"), RESPONSE_ACCEPT);
	dialog.set_default_response (RESPONSE_ACCEPT);
	dialog.set_position (WIN_POS_CENTER);
	message.show();
	image->show();
	hbox->show();

	switch (dialog.run ()) {
	case RESPONSE_ACCEPT:
		return 0;
	default:
		return 1;
	}
}


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);
	}
}

void
ARDOUR_UI::use_config ()
{
	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->get_preferred_edit_position(), 1);
	} else {
		primary_clock.set (pos, 0, true);
	}

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

	if (big_clock_window->get()) {
		big_clock.set (pos);
	}
}


void
ARDOUR_UI::step_edit_status_change (bool yn)
{
        // XXX should really store pre-step edit status of things
        // we make insensitive

        if (yn) {
                rec_button.set_visual_state (3);
                rec_button.set_sensitive (false);
        } else {
                rec_button.set_visual_state (0);
                rec_button.set_sensitive (true);
        }
}

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

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

	Session::RecordState const r = _session->record_status ();
	bool const h = _session->have_rec_enabled_track ();

	if (r == Session::Recording && h)  {
		big_clock.set_widget_name ("BigClockRecording");
	} else {
		big_clock.set_widget_name ("BigClockNonRecording");
	}
}

bool
ARDOUR_UI::first_idle ()
{
	if (_session) {
		_session->allow_auto_play (true);
	}

	if (editor) {
		editor->first_idle();
	}

	Keyboard::set_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 (double val)
{
	if (type == ShuttleControl) {
		double fract;

		if (val == 0.5) {
			fract = 0.0;
		} else {
			if (val < 0.5) {
				fract = -((0.5 - val)/0.5);
			} else {
				fract = ((val - 0.5)/0.5);
			}
		}

		ui.set_shuttle_fract (fract);
		return;
	}

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

	const 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 ();
	}
}

double
ARDOUR_UI::TransportControllable::get_value (void) const
{
	float val = 0.0;

	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 ();
	}


	if (getenv ("ARDOUR_SAE")) {
		Profile->set_sae ();
		Profile->set_single_package ();
	}
}

void
ARDOUR_UI::toggle_translations ()
{
        using namespace Glib;
        
        RefPtr<Action> act = ActionManager::get_action (X_("Main"), X_("EnableTranslation"));
        if (act) {
                RefPtr<ToggleAction> ract = RefPtr<ToggleAction>::cast_dynamic (act);
                if (ract) {
                        
                        string i18n_killer = ARDOUR::translation_kill_path();
                        
                        bool already_enabled = !ARDOUR::translations_are_disabled ();
                        
                        if (ract->get_active ()) {
/* we don't care about errors */
                                int fd = ::open (i18n_killer.c_str(), O_RDONLY|O_CREAT, 0644);
                                close (fd);
                        } else {
/* we don't care about errors */
                                unlink (i18n_killer.c_str());
                        }
                        
                        if (already_enabled != ract->get_active()) {
                                MessageDialog win (already_enabled ? _("Translations disabled") : _("Translations enabled"),
                                                   false,
                                                   Gtk::MESSAGE_WARNING,
                                                   Gtk::BUTTONS_OK);
                                win.set_secondary_text (string_compose (_("You must restart %1 for this to take effect."), PROGRAM_NAME));
                                win.set_position (Gtk::WIN_POS_CENTER);
                                win.present ();
                                win.run ();
                        }
                }
        }
}        

/** Add a window proxy to our list, so that its state will be saved.
 *  This call also causes the window to be created and opened if its
 *  state was saved as `visible'.
 */
void
ARDOUR_UI::add_window_proxy (WindowProxyBase* p)
{
	_window_proxies.push_back (p);
	p->maybe_show ();
}

/** Remove a window proxy from our list.  Must be called if a WindowProxy
 *  is deleted, to prevent hanging pointers.
 */
void
ARDOUR_UI::remove_window_proxy (WindowProxyBase* p)
{
	_window_proxies.remove (p);
}