root/gui/main.c @ 42429315c5e0fc08b65a7fd8c942ec869de639ae

/* -*- Mode: C ; c-basic-offset: 2 -*- */
/*
 * LADI Session Handler (ladish)
 *
 * Copyright (C) 2008, 2009, 2010 Nedko Arnaudov <nedko@arnaudov.name>
 * Copyright (C) 2007 Dave Robillard <http://drobilla.net>
 *
 **************************************************************************
 * This file contains the code that implements main() and other top-level functionality
 **************************************************************************
 *
 * LADI Session Handler 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.
 *
 * LADI Session Handler 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 LADI Session Handler. If not, see <http://www.gnu.org/licenses/>
 * or write to the Free Software Foundation, Inc.,
 * 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include "common.h"

#include <dbus/dbus-glib.h>
#include <dbus/dbus-glib-lowlevel.h>

#include <math.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>

#include "gtk_builder.h"
#include "canvas.h"
#include "graph_canvas.h"
#include "../proxies/jack_proxy.h"
#include "../proxies/control_proxy.h"
#include "../dbus_constants.h"
#include "world_tree.h"
#include "graph_view.h"
#include "../catdup.h"
#include "../proxies/studio_proxy.h"
#include "ask_dialog.h"
#include "../proxies/app_supervisor_proxy.h"

GtkWidget * g_main_win;

GtkWidget * g_clear_load_button;
GtkWidget * g_xrun_progress_bar;

GtkWidget * g_menu_item_new_studio;
GtkWidget * g_menu_item_start_studio;
GtkWidget * g_menu_item_stop_studio;
GtkWidget * g_menu_item_save_studio;
GtkWidget * g_menu_item_save_as_studio;
GtkWidget * g_menu_item_unload_studio;
GtkWidget * g_menu_item_rename_studio;
GtkWidget * g_menu_item_create_room;
GtkWidget * g_menu_item_destroy_room;
GtkWidget * g_menu_item_load_project;
GtkWidget * g_menu_item_daemon_exit;
GtkWidget * g_menu_item_jack_configure;
GtkCheckMenuItem * g_menu_item_jack_latency_32;
GtkCheckMenuItem * g_menu_item_jack_latency_64;
GtkCheckMenuItem * g_menu_item_jack_latency_128;
GtkCheckMenuItem * g_menu_item_jack_latency_256;
GtkCheckMenuItem * g_menu_item_jack_latency_512;
GtkCheckMenuItem * g_menu_item_jack_latency_1024;
GtkCheckMenuItem * g_menu_item_jack_latency_2048;
GtkCheckMenuItem * g_menu_item_jack_latency_4096;
GtkCheckMenuItem * g_menu_item_jack_latency_8192;
GtkWidget * g_studio_status_label;
GtkWidget * g_menu_item_view_toolbar;
GtkWidget * g_toolbar;
GtkWidget * g_menu_item_start_app;
GtkWidget * g_status_image;
GtkWidget * g_status_tool_item;

GtkWidget * g_name_dialog;
GtkWidget * g_app_dialog;

graph_view_handle g_jack_view = NULL;
graph_view_handle g_studio_view = NULL;

static guint g_jack_poll_source_tag;
static guint g_ladishd_poll_source_tag;
static double g_jack_max_dsp_load = 0.0;

#define STUDIO_STATE_UNKNOWN    0
#define STUDIO_STATE_UNLOADED   1
#define STUDIO_STATE_STOPPED    2
#define STUDIO_STATE_STARTED    3
#define STUDIO_STATE_CRASHED    4
#define STUDIO_STATE_NA         5
#define STUDIO_STATE_SICK       6

static unsigned int g_studio_state = STUDIO_STATE_UNKNOWN;

#define JACK_STATE_NA         0
#define JACK_STATE_STOPPED    1
#define JACK_STATE_STARTED    2

static unsigned int g_jack_state = JACK_STATE_NA;

struct studio_list
{
  int count;
  GtkWidget * menu_item;
  GtkWidget * menu;
  void (* item_activate_callback)(GtkWidget * item);
  bool add_sensitive;
};

static struct studio_list g_load_studio_list;
static struct studio_list g_delete_studio_list;

#if 0
static void
gtkmm_get_ink_pixel_size (Glib::RefPtr<Pango::Layout> layout,
             int& width,
             int& height)
{
  Pango::Rectangle ink_rect = layout->get_ink_extents ();
  
  width = (ink_rect.get_width() + PANGO_SCALE / 2) / PANGO_SCALE;
  height = (ink_rect.get_height() + PANGO_SCALE / 2) / PANGO_SCALE;
}

static void
gtkmm_set_width_for_given_text (Gtk::Widget &w, const gchar *text,
               gint hpadding/*, gint vpadding*/)
  
{
  int old_width, old_height;
  w.get_size_request(old_width, old_height);

  int width, height;
  w.ensure_style ();
  
  gtkmm_get_ink_pixel_size (w.create_pango_layout (text), width, height);
  w.set_size_request(width + hpadding, old_height);//height + vpadding);
}

#endif

void set_latency_items_sensivity(bool sensitive)
{
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_32), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_64), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_128), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_256), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_512), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_1024), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_2048), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_4096), sensitive);
  gtk_widget_set_sensitive(GTK_WIDGET(g_menu_item_jack_latency_8192), sensitive);
}

static void buffer_size_clear(void)
{
  set_latency_items_sensivity(false);
}

static bool latency_changing = false;

static void buffer_size_set(uint32_t size)
{
  GtkCheckMenuItem * item_ptr;

  switch (size)
  {
  case 32:
    item_ptr = g_menu_item_jack_latency_32;
    break;
  case 64:
    item_ptr = g_menu_item_jack_latency_64;
    break;
  case 128:
    item_ptr = g_menu_item_jack_latency_128;
    break;
  case 256:
    item_ptr = g_menu_item_jack_latency_256;
    break;
  case 512:
    item_ptr = g_menu_item_jack_latency_512;
    break;
  case 1024:
    item_ptr = g_menu_item_jack_latency_1024;
    break;
  case 2048:
    item_ptr = g_menu_item_jack_latency_2048;
    break;
  case 4096:
    item_ptr = g_menu_item_jack_latency_4096;
    break;
  case 8192:
    item_ptr = g_menu_item_jack_latency_8192;
    break;
  default:
    //log_error("unknown jack buffer size %"PRIu32, size);
    buffer_size_clear();
    return;
  }

  if (!item_ptr->active)
  {
    log_info("JACK latency changed: %"PRIu32" samples", size);
    latency_changing = true;
    gtk_check_menu_item_set_active(item_ptr, TRUE);
    latency_changing = false;
  }
}

static void buffer_size_change_request(GtkCheckMenuItem * item_ptr, gpointer user_data)
{
  uint32_t size;

  if (latency_changing)
  { /* skip activations because of gtk_check_menu_item_set_active() called from buffer_size_set() */
    return;
  }

  if (!item_ptr->active)
  { /* skip radio button deactivations, we are interested only in activations */
    return;
  }

  size = (uint32_t)(guintptr)user_data;

  log_info("JACK latency change request: %"PRIu32" samples", size);

  if (!jack_proxy_set_buffer_size(size))
  {
    log_error("cannot set JACK buffer size");
  }
}

static void update_buffer_size(void)
{
  uint32_t size;

  if (jack_proxy_get_buffer_size(&size))
  {
    buffer_size_set(size);
  }
  else
  {
    buffer_size_clear();
  }
}

static void update_load(void)
{
  uint32_t xruns;
  double load;
  char tmp_buf[100];

  if (!jack_proxy_get_xruns(&xruns) || !jack_proxy_get_dsp_load(&load))
  {
    gtk_progress_bar_set_text(GTK_PROGRESS_BAR(g_xrun_progress_bar), "error");
    gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(g_xrun_progress_bar), 0.0);
  }

  snprintf(tmp_buf, sizeof(tmp_buf), "%" PRIu32 " Dropouts", xruns);
  gtk_progress_bar_set_text(GTK_PROGRESS_BAR(g_xrun_progress_bar), tmp_buf);

  load /= 100.0;           // dbus returns it in percents, we use 0..1

  if (load > g_jack_max_dsp_load)
  {
    g_jack_max_dsp_load = load;
    gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(g_xrun_progress_bar), load);
  }
}

static void clear_load(void)
{
  jack_proxy_reset_xruns();
  g_jack_max_dsp_load = 0.0;
  gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(g_xrun_progress_bar), 0.0);
}

bool name_dialog(const char * title, const char * object, const char * old_name, char ** new_name)
{
  guint result;
  bool ok;
  GtkEntry * entry = GTK_ENTRY(get_gtk_builder_widget("name_entry"));

  gtk_window_set_title(GTK_WINDOW(g_app_dialog), title);

  gtk_widget_show(g_name_dialog);

  gtk_label_set_text(GTK_LABEL(get_gtk_builder_widget("name_label")), object);
  gtk_entry_set_text(entry, old_name);
  gtk_editable_select_region(GTK_EDITABLE(entry), 0, -1);

  result = gtk_dialog_run(GTK_DIALOG(g_name_dialog));
  ok = result == 2;
  if (ok)
  {
    *new_name = strdup(gtk_entry_get_text(entry));
    if (*new_name == NULL)
    {
      log_error("strdup failed for new name (name_dialog)");
      ok = false;
    }
  }

  gtk_widget_hide(g_name_dialog);

  return ok;
}

void error_message_box(const char * failed_operation)
{
  GtkWidget * dialog;
  dialog = get_gtk_builder_widget("error_dialog");
  gtk_message_dialog_set_markup(GTK_MESSAGE_DIALOG(dialog), "<b><big>Error</big></b>");
  gtk_message_dialog_format_secondary_markup(GTK_MESSAGE_DIALOG(dialog), "%s", failed_operation);
  gtk_widget_show(dialog);
  gtk_dialog_run(GTK_DIALOG(dialog));
  gtk_widget_hide(dialog);
}

void run_custom_command_dialog(void)
{
  guint result;
  GtkEntry * command_entry = GTK_ENTRY(get_gtk_builder_widget("app_command_entry"));
  GtkEntry * name_entry = GTK_ENTRY(get_gtk_builder_widget("app_name_entry"));
  GtkToggleButton * terminal_button = GTK_TOGGLE_BUTTON(get_gtk_builder_widget("app_terminal_check_button"));
  GtkToggleButton * level0_button = GTK_TOGGLE_BUTTON(get_gtk_builder_widget("app_level0"));
  GtkToggleButton * level1_button = GTK_TOGGLE_BUTTON(get_gtk_builder_widget("app_level1"));
  GtkToggleButton * level2_button = GTK_TOGGLE_BUTTON(get_gtk_builder_widget("app_level2"));
  GtkToggleButton * level3_button = GTK_TOGGLE_BUTTON(get_gtk_builder_widget("app_level3"));
  uint8_t level;

  gtk_entry_set_text(name_entry, "");
  gtk_entry_set_text(command_entry, "");
  gtk_toggle_button_set_active(terminal_button, FALSE);

  gtk_widget_set_sensitive(GTK_WIDGET(command_entry), TRUE);
  gtk_widget_set_sensitive(GTK_WIDGET(terminal_button), TRUE);
  gtk_widget_set_sensitive(GTK_WIDGET(level0_button), TRUE);
  gtk_widget_set_sensitive(GTK_WIDGET(level1_button), TRUE);

  gtk_window_set_focus(GTK_WINDOW(g_app_dialog), GTK_WIDGET(command_entry));
  gtk_window_set_title(GTK_WINDOW(g_app_dialog), "New application");

  gtk_widget_show(g_app_dialog);

  result = gtk_dialog_run(GTK_DIALOG(g_app_dialog));
  if (result == 2)
  {
    if (gtk_toggle_button_get_active(level0_button))
    {
      level = 0;
    }
    else if (gtk_toggle_button_get_active(level1_button))
    {
      level = 1;
    }
    else if (gtk_toggle_button_get_active(level2_button))
    {
      level = 2;
    }
    else if (gtk_toggle_button_get_active(level3_button))
    {
      level = 3;
    }
    else
    {
      log_error("unknown level");
      ASSERT_NO_PASS;
      level = 0;
    }

    log_info("'%s':'%s' %s level %"PRIu8, gtk_entry_get_text(name_entry), gtk_entry_get_text(command_entry), gtk_toggle_button_get_active(terminal_button) ? "terminal" : "shell", level);
    if (!app_run_custom(
          g_studio_view,
          gtk_entry_get_text(command_entry),
          gtk_entry_get_text(name_entry),
          gtk_toggle_button_get_active(terminal_button),
          level))
    {
      error_message_box("Execution failed. I know you want to know more for the reson but currently you can only check the log file.");
    }
  }

  gtk_widget_hide(g_app_dialog);
}

static void arrange(void)
{
  canvas_handle canvas;

  log_info("arrange request");

  canvas = get_current_canvas();
  if (canvas != NULL)
  {
    canvas_arrange(canvas);
  }
}

static void daemon_exit(GtkWidget * item)
{
  log_info("Daemon exit request");

  if (!control_proxy_exit())
  {
    error_message_box("Daemon exit command failed, please inspect logs.");
  }
}

static void jack_configure(GtkWidget * item)
{
  GError * error_ptr;
  gchar * argv[] = {"ladiconf", NULL};
  GtkWidget * dialog;

  log_info("JACK configure request");

  error_ptr = NULL;
  if (!g_spawn_async(
        NULL,                   /* working directory */
        argv,
        NULL,                   /* envp */
        G_SPAWN_SEARCH_PATH,    /* flags */
        NULL,                   /* child_setup callback */
        NULL,                   /* user_data */
        NULL,
        &error_ptr))
  {
    dialog = get_gtk_builder_widget("error_dialog");
    gtk_message_dialog_set_markup(GTK_MESSAGE_DIALOG(dialog), "<b><big>Error executing ladiconf.\nAre LADI Tools installed?</big></b>");
    gtk_message_dialog_format_secondary_markup(GTK_MESSAGE_DIALOG(dialog), "%s", error_ptr->message);
    gtk_widget_show(dialog);
    gtk_dialog_run(GTK_DIALOG(dialog));
    gtk_widget_hide(dialog);
    g_error_free(error_ptr);
  }
}

static void on_load_studio(GtkWidget * item)
{
  const char * studio_name;

  studio_name = gtk_label_get_text(GTK_LABEL(gtk_bin_get_child(GTK_BIN(item))));
  log_info("Load studio \"%s\"", studio_name);

  if (!control_proxy_load_studio(studio_name))
  {
    error_message_box("Studio load failed, please inspect logs.");
  }
}

static void on_delete_studio(GtkWidget * item)
{
  const char * studio_name;
  bool result;

  studio_name = gtk_label_get_text(GTK_LABEL(gtk_bin_get_child(GTK_BIN(item))));

  if (!ask_dialog(&result, "<b><big>Confirm studio delete</big></b>", "Studio \"%s\" will be deleted. Are you sure?", studio_name) || !result)
  {
    return;
  }

  log_info("Delete studio \"%s\"", studio_name);

  if (!control_proxy_delete_studio(studio_name))
  {
    error_message_box("Studio delete failed, please inspect logs.");
  }
}

#define studio_list_ptr ((struct studio_list *)context)

static void remove_studio_list_menu_entry(GtkWidget * item, gpointer context)
{
  GtkWidget * label;

  label = gtk_bin_get_child(GTK_BIN(item));

  //log_debug("removing studio menu item \"%s\"", gtk_menu_item_get_label(GTK_MENU_ITEM(item));
  // gtk_menu_item_get_label() requries gtk 2.16
  log_debug("removing studio menu item \"%s\"", gtk_label_get_text(GTK_LABEL(label)));

  gtk_container_remove(GTK_CONTAINER(item), label); /* destroy the label and drop the item refcount by one */
  //log_info("refcount == %d", (unsigned int)G_OBJECT(item)->ref_count);
  gtk_container_remove(GTK_CONTAINER(studio_list_ptr->menu), item); /* drop the refcount of item by one and thus destroy it */
  studio_list_ptr->count--;
}

static void add_studio_list_menu_entry(void * context, const char * studio_name)
{
  GtkWidget * item;

  item = gtk_menu_item_new_with_label(studio_name);
  //log_info("refcount == %d", (unsigned int)G_OBJECT(item)->ref_count); // refcount == 2 because of the label
  gtk_widget_set_sensitive(item, studio_list_ptr->add_sensitive);
  gtk_widget_show(item);
  gtk_menu_shell_append(GTK_MENU_SHELL(studio_list_ptr->menu), item);
  g_signal_connect(G_OBJECT(item), "activate", G_CALLBACK(studio_list_ptr->item_activate_callback), item);
  studio_list_ptr->count++;
}

#undef studio_list_ptr

static void menu_studio_list_clear(struct studio_list * studio_list_ptr)
{
  gtk_container_foreach(GTK_CONTAINER(studio_list_ptr->menu), remove_studio_list_menu_entry, studio_list_ptr);
  ASSERT(studio_list_ptr->count == 0);
  studio_list_ptr->count = 0;
}

static void populate_studio_list_menu(GtkMenuItem * menu_item, struct studio_list * studio_list_ptr)
{
  menu_studio_list_clear(studio_list_ptr);
  studio_list_ptr->add_sensitive = true;
  if (!control_proxy_get_studio_list(add_studio_list_menu_entry, studio_list_ptr))
  {
    menu_studio_list_clear(studio_list_ptr);
    studio_list_ptr->add_sensitive = false;
    add_studio_list_menu_entry(studio_list_ptr, "Error obtaining studio list");
  }
  else if (studio_list_ptr->count == 0)
  {
    studio_list_ptr->add_sensitive = false;
    add_studio_list_menu_entry(studio_list_ptr, "Empty studio list");
  }
}

static void save_studio(void)
{
  log_info("save studio request");
  if (!studio_proxy_save())
  {
    error_message_box("Studio save failed, please inspect logs.");
  }
}

static void save_as_studio(void)
{
  char * new_name;

  log_info("save as studio request");

  if (name_dialog("Save studio as", "Studio name", "", &new_name))
  {
    if (!studio_proxy_save_as(new_name))
    {
      error_message_box("Saving of studio failed, please inspect logs.");
    }

    free(new_name);
  }
}

static void new_studio(void)
{
  char * new_name;

  log_info("new studio request");

  if (name_dialog("New studio", "Studio name", "", &new_name))
  {
    if (!control_proxy_new_studio(new_name))
    {
      error_message_box("Creation of new studio failed, please inspect logs.");
    }

    free(new_name);
  }
}

static void start_app(void)
{
  run_custom_command_dialog();
}

static void start_studio(void)
{
  log_info("start studio request");
  if (!studio_proxy_start())
  {
    error_message_box("Studio start failed, please inspect logs.");
  }
}

static void stop_studio(void)
{
  log_info("stop studio request");
  if (!studio_proxy_stop())
  {
    error_message_box("Studio stop failed, please inspect logs.");
  }
}

static void unload_studio(void)
{
  log_info("unload studio request");
  if (!studio_proxy_unload())
  {
    error_message_box("Studio unload failed, please inspect logs.");
  }
}

static void rename_studio(void)
{
  char * new_name;

  if (name_dialog("Rename studio", "Studio name", get_view_name(g_studio_view), &new_name))
  {
    if (!studio_proxy_rename(new_name))
    {
      error_message_box("Studio rename failed, please inspect logs.");
    }

    free(new_name);
  }
}

static gboolean poll_jack(gpointer data)
{
  update_load();
  update_buffer_size();

  return TRUE;
}

static gboolean poll_ladishd(gpointer data)
{
  control_proxy_ping();
  return TRUE;
}

bool studio_state_changed(char ** name_ptr_ptr)
{
  const char * status;
  const char * name;
  char * buffer;
  const gchar * stock_id;
  const char * tooltip;

  gtk_widget_set_sensitive(g_menu_item_start_studio, g_studio_state == STUDIO_STATE_STOPPED);
  gtk_widget_set_sensitive(g_menu_item_stop_studio, g_studio_state == STUDIO_STATE_STARTED);
  gtk_widget_set_sensitive(g_menu_item_save_studio, g_studio_state == STUDIO_STATE_STARTED);
  gtk_widget_set_sensitive(g_menu_item_save_as_studio, g_studio_state == STUDIO_STATE_STARTED);
  gtk_widget_set_sensitive(g_menu_item_unload_studio, g_studio_state != STUDIO_STATE_UNLOADED);
  gtk_widget_set_sensitive(g_menu_item_rename_studio, g_studio_state == STUDIO_STATE_STOPPED || g_studio_state == STUDIO_STATE_STARTED);
  gtk_widget_set_sensitive(g_menu_item_start_app, g_studio_state == STUDIO_STATE_STOPPED || g_studio_state == STUDIO_STATE_STARTED);
  //gtk_widget_set_sensitive(g_menu_item_create_room, g_studio_loaded);
  //gtk_widget_set_sensitive(g_menu_item_destroy_room, g_studio_loaded);
  //gtk_widget_set_sensitive(g_menu_item_load_project, g_studio_loaded);

  stock_id = NULL;
  tooltip = NULL;

  switch (g_jack_state)
  {
  case JACK_STATE_NA:
    tooltip = status = "JACK is sick";
    stock_id = GTK_STOCK_DIALOG_WARNING;
    break;
  case JACK_STATE_STOPPED:
    status = "Stopped";
    break;
  case JACK_STATE_STARTED:
    status = "xruns";
    break;
  default:
    status = "???";
    tooltip = "Internal error - unknown jack state";
    stock_id = GTK_STOCK_DIALOG_WARNING;
  }

  buffer = NULL;

  switch (g_studio_state)
  {
  case STUDIO_STATE_NA:
    name = "ladishd is down";
    break;
  case STUDIO_STATE_SICK:
  case STUDIO_STATE_UNKNOWN:
    tooltip = name = "ladishd is sick";
    stock_id = GTK_STOCK_DIALOG_WARNING;
    break;
  case STUDIO_STATE_UNLOADED:
    name = "No studio loaded";
    break;
  case STUDIO_STATE_CRASHED:
    status = "Crashed";
    tooltip = "Crashed studio, save your work if you can and unload the studio";
    stock_id = GTK_STOCK_DIALOG_WARNING;
    /* fall through */
  case STUDIO_STATE_STOPPED:
  case STUDIO_STATE_STARTED:
    if (!studio_proxy_get_name(&buffer))
    {
      tooltip = "failed to get studio name";
      log_error("%s", tooltip);
      stock_id = GTK_STOCK_DIALOG_WARNING;
    }
    else
    {
      name = buffer;
      switch (g_studio_state)
      {
      case STUDIO_STATE_STARTED:
        stock_id = GTK_STOCK_YES;
        tooltip = "Studio is started";
        break;
      case STUDIO_STATE_STOPPED:
        stock_id = GTK_STOCK_NO;
        tooltip = "Studio is stopped";
        break;
      }
      break;
    }
  default:
    name = "???";
    tooltip = "Internal error - unknown studio state";
    stock_id = GTK_STOCK_DIALOG_WARNING;
  }

  gtk_progress_bar_set_text(GTK_PROGRESS_BAR(g_xrun_progress_bar), status);
  gtk_label_set_text(GTK_LABEL(g_studio_status_label), name);

  gtk_image_set_from_stock(GTK_IMAGE(g_status_image), stock_id, GTK_ICON_SIZE_SMALL_TOOLBAR);
  gtk_tool_item_set_tooltip_text(GTK_TOOL_ITEM(g_status_tool_item), tooltip);

  if (buffer == NULL)
  {
    return false;
  }

  if (name_ptr_ptr != NULL)
  {
    *name_ptr_ptr = buffer;
  }
  else
  {
    free(buffer);
  }

  return true;
}

void control_proxy_on_daemon_appeared(void)
{
  if (g_studio_state == STUDIO_STATE_NA || g_studio_state == STUDIO_STATE_SICK)
  {
    log_info("ladishd appeared");
    g_source_remove(g_ladishd_poll_source_tag);
  }

  g_studio_state = STUDIO_STATE_UNLOADED;
  studio_state_changed(NULL);
}

void control_proxy_on_daemon_disappeared(bool clean_exit)
{
  log_info("ladishd disappeared");

  if (!clean_exit)
  {
    error_message_box("ladish daemon crashed");
    g_studio_state = STUDIO_STATE_SICK;
  }
  else
  {
    g_studio_state = STUDIO_STATE_NA;
  }

  studio_state_changed(NULL);

  if (g_studio_view != NULL)
  {
    destroy_view(g_studio_view);
    g_studio_view = NULL;
  }

  g_ladishd_poll_source_tag = g_timeout_add(500, poll_ladishd, NULL);
}

void control_proxy_on_studio_appeared(bool initial)
{
  char * name;
  bool started;

  g_studio_state = STUDIO_STATE_STOPPED;

  if (initial)
  {
    if (!studio_proxy_is_started(&started))
    {
      log_error("intially, studio is present but is_started() check failed.");
      return;
    }

    if (started)
    {
      g_studio_state = STUDIO_STATE_STARTED;
    }
  }

  if (studio_state_changed(&name))
  {
    if (g_studio_view != NULL)
    {
      log_error("studio appear signal received but studio already exists");
    }
    else if (!create_view(name, SERVICE_NAME, STUDIO_OBJECT_PATH, true, true, false, &g_studio_view))
    {
      log_error("create_view() failed for studio");
    }

    free(name);
  }
}

void control_proxy_on_studio_disappeared(void)
{
  g_studio_state = STUDIO_STATE_UNLOADED;
  studio_state_changed(NULL);

  if (g_studio_view == NULL)
  {
    log_error("studio disappear signal received but studio does not exists");
    return;
  }

  if (g_studio_view != NULL)
  {
    destroy_view(g_studio_view);
    g_studio_view = NULL;
  }
}

static void on_studio_renamed(const char * new_studio_name)
{
  if (g_studio_view != NULL)
  {
    set_view_name(g_studio_view, new_studio_name);
    gtk_label_set_text(GTK_LABEL(g_studio_status_label), new_studio_name);
  }
}

void on_studio_started(void)
{
  g_studio_state = STUDIO_STATE_STARTED;
  studio_state_changed(NULL);
}

void on_studio_stopped(void)
{
  g_studio_state = STUDIO_STATE_STOPPED;
  studio_state_changed(NULL);
}

void on_studio_crashed(void)
{
  g_studio_state = STUDIO_STATE_CRASHED;
  studio_state_changed(NULL);
  error_message_box("JACK crashed or stopped unexpectedly. Save your work, then unload and reload the studio.");
}

void jack_started(void)
{
  log_info("JACK started");

  g_jack_state = JACK_STATE_STARTED;
  studio_state_changed(NULL);

  set_latency_items_sensivity(true);
  gtk_widget_set_sensitive(g_clear_load_button, true);

  g_jack_poll_source_tag = g_timeout_add(100, poll_jack, NULL);
}

void jack_stopped(void)
{
  if (g_jack_state == JACK_STATE_STARTED)
  {
    log_info("JACK stopped");

    g_source_remove(g_jack_poll_source_tag);
  }

  g_jack_state = JACK_STATE_STOPPED;
  studio_state_changed(NULL);

  set_latency_items_sensivity(false);
  buffer_size_clear();
  gtk_widget_set_sensitive(g_clear_load_button, false);
  gtk_progress_bar_set_fraction(GTK_PROGRESS_BAR(g_xrun_progress_bar), 0.0);
}

void jack_appeared(void)
{
  log_info("JACK appeared");

  g_jack_state = JACK_STATE_STOPPED;
  studio_state_changed(NULL);

#if defined(SHOW_RAW_JACK)
  if (!create_view("Raw JACK", JACKDBUS_SERVICE_NAME, JACKDBUS_OBJECT_PATH, false, false, true, &g_jack_view))
  {
    log_error("create_view() failed for jack");
    return;
  }
#endif
}

void jack_disappeared(void)
{
  log_info("JACK disappeared");

  jack_stopped();

  g_jack_state = JACK_STATE_NA;
  studio_state_changed(NULL);

#if defined(SHOW_RAW_JACK)
  if (g_jack_view != NULL)
  {
    destroy_view(g_jack_view);
    g_jack_view = NULL;
  }
#endif
}

void
set_main_window_title(
  graph_view_handle view)
{
  char * title;

  if (view != NULL)
  {
    title = catdup(get_view_name(view), " - LADI Session Handler");
    gtk_window_set_title(GTK_WINDOW(g_main_win), title);
    free(title);
  }
  else
  {
    gtk_window_set_title(GTK_WINDOW(g_main_win), "LADI Session Handler");
  }
}

static
void
init_studio_list(
  struct studio_list * studio_list_ptr,
  const char * menu_item,
  const char * menu,
  void (* item_activate_callback)(GtkWidget * item))
{
  studio_list_ptr->count = 0;
  studio_list_ptr->menu_item = get_gtk_builder_widget(menu_item);
  studio_list_ptr->menu = get_gtk_builder_widget(menu);
  studio_list_ptr->item_activate_callback = item_activate_callback;
  gtk_menu_item_set_submenu(GTK_MENU_ITEM(studio_list_ptr->menu_item), studio_list_ptr->menu);
  g_signal_connect(G_OBJECT(studio_list_ptr->menu_item), "activate", G_CALLBACK(populate_studio_list_menu), studio_list_ptr);
}

static void toggle_toolbar(void)
{
        if (gtk_check_menu_item_get_active(GTK_CHECK_MENU_ITEM(g_menu_item_view_toolbar)))
  {
                gtk_widget_show(g_toolbar);
  }
        else
  {
                gtk_widget_hide(g_toolbar);
  }
}

static char * read_file_contents(const char * filename)
{
  int fd;
  struct stat st;
  char * buffer;

  if (stat(filename, &st) != 0)
  {
    return NULL;
  }

  fd = open(filename, O_RDONLY);
  if (fd == -1)
  {
    return NULL;
  }

  buffer = malloc(st.st_size + 1);
  if (buffer == NULL)
  {
    close(fd);
    return NULL;
  }

  if (read(fd, buffer, (size_t)st.st_size) != (ssize_t)st.st_size)
  {
    free(buffer);
    buffer = NULL;
  }
  else
  {
    buffer[st.st_size] = 0;
  }

  close(fd);

  return buffer;
}

#define ABOUT_DIALOG_LOGO "ladish-logo-128x128.png"

static void show_about(void)
{
  GtkWidget * dialog;
  GdkPixbuf * pixbuf;
  const char * authors[] = {"Nedko Arnaudov", NULL};
  const char * artists[] = {"Lapo Calamandrei", NULL};
  char * license;

  pixbuf = gdk_pixbuf_new_from_file("./art/" ABOUT_DIALOG_LOGO, NULL);
  if (pixbuf == NULL)
  {
    pixbuf = gdk_pixbuf_new_from_file(DATA_DIR "/" ABOUT_DIALOG_LOGO, NULL);
  }

  license = read_file_contents(DATA_DIR "/COPYING");

  dialog = get_gtk_builder_widget("about_win");
  gtk_about_dialog_set_version(GTK_ABOUT_DIALOG(dialog), PACKAGE_VERSION);

  if (pixbuf != NULL)
  {
    gtk_about_dialog_set_logo(GTK_ABOUT_DIALOG(dialog), pixbuf);
    g_object_unref(pixbuf);
  }

  if (license != NULL)
  {
    gtk_about_dialog_set_license(GTK_ABOUT_DIALOG(dialog), license);
    free(license);
  }

  gtk_about_dialog_set_authors(GTK_ABOUT_DIALOG(dialog), authors);
  gtk_about_dialog_set_artists(GTK_ABOUT_DIALOG(dialog), artists);

  gtk_widget_show(dialog);
  gtk_dialog_run(GTK_DIALOG(dialog));
  gtk_widget_hide(dialog);
}

static void dbus_init(void)
{
  dbus_error_init(&g_dbus_error);

  // Connect to the bus
  g_dbus_connection = dbus_bus_get(DBUS_BUS_SESSION, &g_dbus_error);
  if (dbus_error_is_set(&g_dbus_error))
  {
    //error_msg("dbus_bus_get() failed");
    //error_msg(g_dbus_error.message);
    dbus_error_free(&g_dbus_error);
  }

  dbus_connection_setup_with_g_main(g_dbus_connection, NULL);
}

void dbus_uninit(void)
{
  if (g_dbus_connection)
  {
    dbus_connection_flush(g_dbus_connection);
  }

  if (dbus_error_is_set(&g_dbus_error))
  {
    dbus_error_free(&g_dbus_error);
  }
}

int main(int argc, char** argv)
{
  gtk_init(&argc, &argv);

  if (!canvas_init())
  {
    log_error("Canvas initialization failed.");
    return 1;
  }

  if (!init_gtk_builder())
  {
    return 1;
  }

  g_main_win = get_gtk_builder_widget("main_win");
  g_clear_load_button = get_gtk_builder_widget("clear_load_button");
  g_xrun_progress_bar = get_gtk_builder_widget("xrun_progress_bar");
  g_menu_item_new_studio = get_gtk_builder_widget("menu_item_new_studio");
  g_menu_item_start_app = get_gtk_builder_widget("menu_item_start_app");
  g_menu_item_start_studio = get_gtk_builder_widget("menu_item_start_studio");
  g_menu_item_stop_studio = get_gtk_builder_widget("menu_item_stop_studio");
  g_menu_item_save_studio = get_gtk_builder_widget("menu_item_save_studio");
  g_menu_item_save_as_studio = get_gtk_builder_widget("menu_item_save_as_studio");
  g_menu_item_unload_studio = get_gtk_builder_widget("menu_item_unload_studio");
  g_menu_item_rename_studio = get_gtk_builder_widget("menu_item_rename_studio");
  g_menu_item_create_room = get_gtk_builder_widget("menu_item_create_room");
  g_menu_item_destroy_room = get_gtk_builder_widget("menu_item_destroy_room");
  g_menu_item_load_project = get_gtk_builder_widget("menu_item_load_project");
  g_menu_item_daemon_exit = get_gtk_builder_widget("menu_item_daemon_exit");
  g_menu_item_jack_configure = get_gtk_builder_widget("menu_item_jack_configure");
  g_studio_status_label = get_gtk_builder_widget("studio_status_label");
  g_menu_item_view_toolbar = get_gtk_builder_widget("menu_item_view_toolbar");
  g_toolbar = get_gtk_builder_widget("toolbar");
  g_status_image = get_gtk_builder_widget("startstop");
  g_status_tool_item = get_gtk_builder_widget("startstop_item");

  g_name_dialog = get_gtk_builder_widget("name_dialog");
  g_app_dialog = get_gtk_builder_widget("app_dialog");

  init_studio_list(&g_load_studio_list, "menu_item_load_studio", "load_studio_menu", on_load_studio);
  init_studio_list(&g_delete_studio_list, "menu_item_delete_studio", "delete_studio_menu", on_delete_studio);

  g_menu_item_jack_latency_32   = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_32"));
  g_menu_item_jack_latency_64   = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_64"));
  g_menu_item_jack_latency_128  = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_128"));
  g_menu_item_jack_latency_256  = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_256"));
  g_menu_item_jack_latency_512  = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_512"));
  g_menu_item_jack_latency_1024 = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_1024"));
  g_menu_item_jack_latency_2048 = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_2048"));
  g_menu_item_jack_latency_4096 = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_4096"));
  g_menu_item_jack_latency_8192 = GTK_CHECK_MENU_ITEM(get_gtk_builder_widget("menu_item_jack_latency_8192"));

  buffer_size_clear();

  world_tree_init();
  view_init();

  dbus_init();

  if (!jack_proxy_init(jack_started, jack_stopped, jack_appeared, jack_disappeared))
  {
    return 1;
  }

  if (!control_proxy_init())
  {
    return 1;
  }

  if (!studio_proxy_init())
  {
    return 1;
  }

  studio_proxy_set_startstop_callbacks(on_studio_started, on_studio_stopped, on_studio_crashed);

  studio_proxy_set_renamed_callback(on_studio_renamed);

  g_signal_connect(G_OBJECT(g_main_win), "destroy", G_CALLBACK(gtk_main_quit), NULL);
  g_signal_connect(G_OBJECT(get_gtk_builder_widget("menu_item_quit")), "activate", G_CALLBACK(gtk_main_quit), NULL);
  g_signal_connect(G_OBJECT(g_clear_load_button), "clicked", G_CALLBACK(clear_load), NULL);
  g_signal_connect(G_OBJECT(get_gtk_builder_widget("menu_item_view_arrange")), "activate", G_CALLBACK(arrange), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_view_toolbar), "activate", G_CALLBACK(toggle_toolbar), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_new_studio), "activate", G_CALLBACK(new_studio), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_start_studio), "activate", G_CALLBACK(start_studio), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_stop_studio), "activate", G_CALLBACK(stop_studio), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_unload_studio), "activate", G_CALLBACK(unload_studio), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_save_studio), "activate", G_CALLBACK(save_studio), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_save_as_studio), "activate", G_CALLBACK(save_as_studio), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_rename_studio), "activate", G_CALLBACK(rename_studio), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_daemon_exit), "activate", G_CALLBACK(daemon_exit), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_jack_configure), "activate", G_CALLBACK(jack_configure), NULL);
  g_signal_connect(G_OBJECT(get_gtk_builder_widget("menu_item_help_about")), "activate", G_CALLBACK(show_about), NULL);
  g_signal_connect(G_OBJECT(g_menu_item_start_app), "activate", G_CALLBACK(start_app), NULL);

  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_32), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)32);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_64), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)64);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_128), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)128);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_256), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)256);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_512), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)512);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_1024), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)1024);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_2048), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)2048);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_4096), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)4096);
  g_signal_connect(G_OBJECT(g_menu_item_jack_latency_8192), "toggled", G_CALLBACK(buffer_size_change_request), (gpointer)8192);

  gtk_widget_show(g_main_win);

  //_about_win->set_transient_for(*_main_win);

  gtk_main();

  studio_proxy_uninit();
  control_proxy_uninit();
  dbus_uninit();
  uninit_gtk_builder();

  return 0;
}