crown-engine/tools/level_editor/level_editor.vala

/*
 * Copyright (c) 2012-2020 Daniele Bartolini and individual contributors.
 * License: https://github.com/dbartolini/crown/blob/master/LICENSE
 */

using Gdk; // Pixbuf
using Gee;
using Gtk;

namespace Crown
{
	const int WINDOW_DEFAULT_WIDTH = 1280;
	const int WINDOW_DEFAULT_HEIGHT = 720;

	public class LevelEditorWindow : Gtk.ApplicationWindow
	{
		private const GLib.ActionEntry[] action_entries =
		{
			{ "fullscreen", on_fullscreen, null, null }
		};

		public bool _fullscreen;

		public LevelEditorWindow(Gtk.Application app)
		{
			Object(application: app);

			this.add_action_entries(action_entries, this);

			this.title = "Level Editor";
			this.key_press_event.connect(this.on_key_press);
			this.key_release_event.connect(this.on_key_release);
			this.window_state_event.connect(this.on_window_state_event);
			this.show.connect(this.on_show);
			this.delete_event.connect(this.on_delete_event);
			this.set_default_size(WINDOW_DEFAULT_WIDTH, WINDOW_DEFAULT_HEIGHT);
			this.focus_out_event.connect(this.on_focus_out);

			_fullscreen = false;
		}

		private void on_fullscreen(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (_fullscreen)
				unfullscreen();
			else
				fullscreen();
		}

		private bool on_key_press(Gdk.EventKey ev)
		{
			LevelEditorApplication app = (LevelEditorApplication)application;

			if (ev.keyval == Gdk.Key.Control_L)
				app._editor.send_script(LevelEditorApi.key_down("ctrl_left"));
			else if (ev.keyval == Gdk.Key.Shift_L)
				app._editor.send_script(LevelEditorApi.key_down("shift_left"));
			else if (ev.keyval == Gdk.Key.Alt_L)
				app._editor.send_script(LevelEditorApi.key_down("alt_left"));

			return false;
		}

		private bool on_key_release(Gdk.EventKey ev)
		{
			LevelEditorApplication app = (LevelEditorApplication)application;

			if (ev.keyval == Gdk.Key.Control_L)
				app._editor.send_script(LevelEditorApi.key_up("ctrl_left"));
			else if (ev.keyval == Gdk.Key.Shift_L)
				app._editor.send_script(LevelEditorApi.key_up("shift_left"));
			else if (ev.keyval == Gdk.Key.Alt_L)
				app._editor.send_script(LevelEditorApi.key_up("alt_left"));

			return false;
		}

		private bool on_window_state_event(EventWindowState ev)
		{
			_fullscreen = (ev.new_window_state & WindowState.FULLSCREEN) != 0;
			return true;
		}

		private void on_show()
		{
			this.maximize();
		}

		private bool on_delete_event()
		{
			LevelEditorApplication app = (LevelEditorApplication)application;
			if (app.should_quit())
			{
				app.close_all();
				return false; // Quit application
			}

			return true; // Keep alive
		}

		private bool on_focus_out(Gdk.EventFocus ev)
		{
			LevelEditorApplication app = (LevelEditorApplication)application;

			app._editor.send_script(LevelEditorApi.key_up("ctrl_left"));
			app._editor.send_script(LevelEditorApi.key_up("shift_left"));
			app._editor.send_script(LevelEditorApi.key_up("alt_left"));
			return true;
		}
	}

	public enum ToolType
	{
		PLACE,
		MOVE,
		ROTATE,
		SCALE
	}

	public enum SnapMode
	{
		RELATIVE,
		ABSOLUTE
	}

	public enum ReferenceSystem
	{
		LOCAL,
		WORLD
	}

	public enum StartGame
	{
		NORMAL,
		TEST
	}

	public class LevelEditorApplication : Gtk.Application
	{
		// Constants
		private const GLib.ActionEntry[] action_entries =
		{
			//                                                     parameter type
			// name                   activate()                   |     state
			// |                      |                            |     |
			{ "menu-file",            null,                        null, null            },
			{ "new-level",            on_new_level,                null, null            },
			{ "open-level",           on_open_level,               "s",  null            },
			{ "open-project",         on_open_project,             null, null            },
			{ "save",                 on_save,                     null, null            },
			{ "save-as",              on_save_as,                  null, null            },
			{ "import",               on_import,                   null, null            },
			{ "preferences",          on_preferences,              null, null            },
			{ "deploy",               on_deploy,                   null, null            },
			{ "quit",                 on_quit,                     null, null            },
			{ "menu-edit",            null,                        null, null            },
			{ "undo",                 on_undo,                     null, null            },
			{ "redo",                 on_redo,                     null, null            },
			{ "duplicate",            on_duplicate,                null, null            },
			{ "delete",               on_delete,                   null, null            },
			{ "tool",                 on_tool_changed,             "s",  "'move'"        },
			{ "snap",                 on_snap_mode_changed,        "s",  "'relative'"    },
			{ "reference-system",     on_reference_system_changed, "s",  "'local'"       },
			{ "snap-to-grid",         on_snap_to_grid,             null, "true"          },
			{ "menu-grid",            null,                        null, null            },
			{ "grid-show",            on_show_grid,                null, "true"          },
			{ "grid-custom",          on_custom_grid,              null, null            },
			{ "grid-preset",          on_grid_changed,             "s",  "'1'"           },
			{ "menu-rotation-snap",   null,                        null, null            },
			{ "rotation-snap-custom", on_rotation_snap,            null, null            },
			{ "rotation-snap-preset", on_rotation_snap_changed,    "s",  "'15'"          },
			{ "menu-create",          null,                        null, null            },
			{ "menu-primitives",      null,                        null, null            },
			{ "primitive-cube",       on_create_primitive,         null, null            },
			{ "primitive-sphere",     on_create_primitive,         null, null            },
			{ "primitive-cone",       on_create_primitive,         null, null            },
			{ "primitive-cylinder",   on_create_primitive,         null, null            },
			{ "primitive-plane",      on_create_primitive,         null, null            },
			{ "camera",               on_create_primitive,         null, null            },
			{ "light",                on_create_primitive,         null, null            },
			{ "sound-source",         on_create_primitive,         null, null            },
			{ "menu-camera",          null,                        null, null            },
			{ "camera-view",          on_camera_view,              "s",  "'perspective'" },
			{ "menu-engine",          null,                        null, null            },
			{ "restart",              on_editor_restart,           null, null            },
			{ "build-data",           on_build_data,               null, null            },
			{ "reload-lua",           on_refresh_lua,              null, null            },
			{ "menu-view",            null,                        null, null            },
			{ "resource-chooser",     on_resource_chooser,         null, null            },
			{ "project-browser",      on_project_browser,          null, null            },
			{ "console",              on_console,                  null, null            },
			{ "statusbar",            on_statusbar,                null, null            },
			{ "inspector",            on_inspector,                null, null            },
			{ "menu-run",             null,                        null, null            },
			{ "test-level",           on_run_game,                 null, null            },
			{ "run-game",             on_run_game,                 null, null            },
			{ "menu-help",            null,                        null, null            },
			{ "manual",               on_manual,                   null, null            },
			{ "report-issue",         on_report_issue,             null, null            },
			{ "browse-logs",          on_browse_logs,              null, null            },
			{ "changelog",            on_changelog,                null, null            },
			{ "about",                on_about,                    null, null            },
			{ "debug-render-world",   on_debug_render_world,       null, "false"         },
			{ "debug-physics-world",  on_debug_physics_world,      null, "false"         }
		};

		// Command line options
		private string _source_dir = "";
		private string _toolchain_dir = "";
		private string _level_resource = "";
		private bool _create_initial_files = false;

		// Editor state
		private double _grid_size;
		private double _rotation_snap;
		private bool _show_grid;
		private bool _snap_to_grid;
		private bool _debug_render_world;
		private bool _debug_physics_world;
		private ToolType _tool_type;
		private SnapMode _snap_mode;
		private ReferenceSystem _reference_system;

		// Engine connections
		private GLib.Subprocess _compiler_process;
		private GLib.Subprocess _editor_process;
		private GLib.Subprocess _game_process;
		private ConsoleClient _compiler;
		public ConsoleClient _editor;
		private ConsoleClient _game;

		// Level data
		private Database _database;
		private Project _project;
		private ProjectStore _project_store;
		private Level _level;
		private DataCompiler _data_compiler;

		// Widgets
		private ProjectBrowser _project_browser;
		private EditorView _editor_view;
		private LevelTreeView _level_treeview;
		private LevelLayersTreeView _level_layers_treeview;
		private PropertiesView _properties_view;
		private PreferencesDialog _preferences_dialog;
		private ResourceChooser _resource_chooser;
		private Gtk.Popover _resource_popover;
		private Gtk.Overlay _editor_view_overlay;
		private Slide _project_slide;
		private Slide _editor_slide;
		private Slide _inspector_slide;

		private Gtk.Toolbar _toolbar;
		private Gtk.ToolButton _toolbar_run;
		private Gtk.Notebook _level_tree_view_notebook;
		private Gtk.Paned _editor_pane;
		private Gtk.Paned _content_pane;
		private Gtk.Paned _inspector_pane;
		private Gtk.Paned _main_pane;
		private Statusbar _statusbar;
		private Gtk.Box _main_vbox;
		private Gtk.FileFilter _file_filter;
		private Gtk.ComboBoxText _combo;

		private uint _save_timer_id;

		public LevelEditorApplication()
		{
			Object(application_id: "org.crown.level_editor"
				, flags: GLib.ApplicationFlags.FLAGS_NONE
				);
		}

		protected override void startup()
		{
			base.startup();

			Gtk.Settings.get_default().gtk_theme_name = "Adwaita";
			Gtk.Settings.get_default().gtk_application_prefer_dark_theme = true;

			Gtk.CssProvider provider = new Gtk.CssProvider();
			Gdk.Screen screen = Gdk.Display.get_default().get_default_screen();
			Gtk.StyleContext.add_provider_for_screen(screen, provider, STYLE_PROVIDER_PRIORITY_APPLICATION);
			provider.load_from_resource("/org/crown/level_editor/css/style.css");

			this.add_action_entries(action_entries, this);

			if (_source_dir == "")
			{
				Gtk.FileChooserDialog fcd = new Gtk.FileChooserDialog("Select folder where to create new project..."
					, null
					, FileChooserAction.SELECT_FOLDER
					, "Cancel"
					, ResponseType.CANCEL
					, "Select"
					, ResponseType.ACCEPT
					);

				if (fcd.run() != (int)ResponseType.ACCEPT)
				{
					fcd.destroy();
					return;
				}

				string dir = fcd.get_filename();
				fcd.destroy();

				if (GLib.FileUtils.test(dir, FileTest.IS_REGULAR))
				{
					stdout.printf("Source directory can't be a regular file\n");
					return;
				}

				_source_dir = dir;
				_create_initial_files = true;
			}

			_compiler = new ConsoleClient();
			_compiler.connected.connect(on_compiler_connected);
			_compiler.disconnected.connect(on_compiler_disconnected_unexpected);
			_compiler.message_received.connect(on_message_received);

			_data_compiler = new DataCompiler(_compiler);

			_project = new Project(_data_compiler);
			_project.load(_source_dir, _toolchain_dir);
			if (_create_initial_files)
				_project.create_initial_files();

			_database = new Database();

			_editor = new ConsoleClient();
			_editor.connected.connect(on_editor_connected);
			_editor.disconnected.connect(on_editor_disconnected_unexpected);
			_editor.message_received.connect(on_message_received);

			_game = new ConsoleClient();
			_game.connected.connect(on_game_connected);
			_game.disconnected.connect(on_game_disconnected);
			_game.message_received.connect(on_message_received);

			_level = new Level(_database, _editor, _project);

			// Editor state
			_grid_size = 1.0;
			_rotation_snap = 15.0;
			_show_grid = true;
			_snap_to_grid = true;
			_debug_render_world = false;
			_debug_physics_world = false;
			_tool_type = ToolType.MOVE;
			_snap_mode = SnapMode.RELATIVE;
			_reference_system = ReferenceSystem.LOCAL;

			// Engine connections
			_compiler_process = null;
			_editor_process = null;
			_game_process = null;

			_project_store = new ProjectStore(_project);

			// Widgets
			_combo = new Gtk.ComboBoxText();
			_combo.append("editor", "Editor");
			_combo.append("game", "Game");
			_combo.set_active_id("editor");

			_console_view = new ConsoleView(_project, _combo);
			_project_browser = new ProjectBrowser(_project, _project_store);
			_level_treeview = new LevelTreeView(_database, _level);
			_level_layers_treeview = new LevelLayersTreeView(_database, _level);
			_properties_view = new PropertiesView(_level, _project_store);

			_project_slide = new Slide();
			_editor_slide = new Slide();
			_inspector_slide = new Slide();

			Gtk.Builder builder = new Gtk.Builder.from_resource("/org/crown/level_editor/ui/toolbar.ui");
			_toolbar = builder.get_object("toolbar") as Gtk.Toolbar;
			_toolbar_run = builder.get_object("run") as Gtk.ToolButton;

			_editor_view_overlay = new Gtk.Overlay();
			_editor_view_overlay.add_overlay(_toolbar);

			_resource_popover = new Gtk.Popover(_toolbar);
			_resource_popover.delete_event.connect(() => { _resource_popover.hide(); return true; });
			_resource_popover.modal = true;

			_preferences_dialog = new PreferencesDialog(this);
			_preferences_dialog.set_transient_for(this.active_window);
			_preferences_dialog.delete_event.connect(() => { _preferences_dialog.hide(); return true; });

			_resource_chooser = new ResourceChooser(_project, _project_store, true);
			_resource_chooser.resource_selected.connect(on_resource_browser_resource_selected);
			_resource_chooser.resource_selected.connect(() => { _resource_popover.hide(); });
			_resource_popover.add(_resource_chooser);

			_level_tree_view_notebook = new Notebook();
			_level_tree_view_notebook.show_border = false;
			_level_tree_view_notebook.append_page(_level_treeview, new Gtk.Image.from_icon_name("level-tree", IconSize.SMALL_TOOLBAR));
			_level_tree_view_notebook.append_page(_level_layers_treeview, new Gtk.Image.from_icon_name("level-layers", IconSize.SMALL_TOOLBAR));

			_editor_pane = new Gtk.Paned(Gtk.Orientation.HORIZONTAL);
			_editor_pane.pack1(_project_slide, false, false);
			_editor_pane.pack2(_editor_slide, true, false);
			_editor_pane.set_position(210);

			_content_pane = new Gtk.Paned(Gtk.Orientation.VERTICAL);
			_content_pane.pack1(_editor_pane, true, false);
			_content_pane.pack2(_console_view, false, false);
			_content_pane.set_position(500);

			_inspector_pane = new Gtk.Paned(Gtk.Orientation.VERTICAL);
			_inspector_pane.pack1(_level_tree_view_notebook, true, false);
			_inspector_pane.pack2(_properties_view, false, false);
			_inspector_pane.set_position(250);

			_main_pane = new Gtk.Paned(Gtk.Orientation.HORIZONTAL);
			_main_pane.pack1(_content_pane, true, false);
			_main_pane.pack2(_inspector_slide, false, false);
			_main_pane.set_position(WINDOW_DEFAULT_WIDTH - 375);

			_statusbar = new Statusbar();

			_main_vbox = new Gtk.Box(Gtk.Orientation.VERTICAL, 0);
			_main_vbox.pack_start(_main_pane, true, true, 0);
			_main_vbox.pack_start(_statusbar, false, false, 0);

			_file_filter = new Gtk.FileFilter();
			_file_filter.set_filter_name("Level (*.level)");
			_file_filter.add_pattern("*.level");

			if (_level_resource != "")
			{
				string level_path = Path.build_filename(_project.source_dir(), _level_resource + ".level");
				if (!GLib.FileUtils.test(level_path, FileTest.EXISTS) || !GLib.FileUtils.test(level_path, FileTest.IS_REGULAR))
				{
					loge("Level resource '%s' does not exist.".printf(_level_resource));
					return;
				}

				_level.load(level_path);
			}
			else
			{
				_level.load_empty_level();
			}

			load_settings();

			restart_compiler();
		}

		public void load_settings()
		{
			Hashtable settings = SJSON.load(_settings_file.get_path());

			_preferences_dialog.load(settings.has_key("preferences") ? (Hashtable)settings["preferences"] : new Hashtable());
		}

		public void save_settings()
		{
			Hashtable preferences = new Hashtable();
			_preferences_dialog.save(preferences);

			Hashtable settings = new Hashtable();
			settings["preferences"] = preferences;

			SJSON.save(settings, _settings_file.get_path());
		}

		protected override void activate()
		{
			if (_source_dir == "")
				return;

			if (this.active_window == null)
			{
				LevelEditorWindow win = new LevelEditorWindow(this);
				win.add(_main_vbox);

				try
				{
					win.icon = IconTheme.get_default().load_icon("pepper", 48, 0);
				}
				catch (Error e)
				{
					loge(e.message);
				}
			}

			this.active_window.show_all();
		}

		protected override bool local_command_line(ref unowned string[] args, out int exit_status)
		{
			if (args.length > 1)
			{
				if (!GLib.FileUtils.test(args[1], FileTest.EXISTS) || !GLib.FileUtils.test(args[1], FileTest.IS_DIR))
				{
					loge("Source directory does not exist or it is not a directory\n");
					exit_status = 1;
					return true;
				}

				_source_dir = args[1];
			}

			if (args.length > 2)
			{
				// Validation is done below after the Project object instantiation
				_level_resource = args[2];
			}

			if (args.length > 3)
			{
				if (!GLib.FileUtils.test(args[3], FileTest.EXISTS) || !GLib.FileUtils.test(args[3], FileTest.IS_DIR))
				{
					loge("Toolchain directory does not exist or it is not a directory\n");
					exit_status = 1;
					return true;
				}

				_toolchain_dir = args[3];
			}
			else
			{
				bool found = false;

				/// More desirable paths come first
				string toolchain_paths[] =
				{
					"../..",
					"../../../samples"
				};

				for (int i = 0; i < toolchain_paths.length; ++i)
				{
					string path = Path.build_filename(toolchain_paths[i], "core");

					// Try to locate the toolchain directory
					if (GLib.FileUtils.test(path, FileTest.EXISTS) && GLib.FileUtils.test(path, FileTest.IS_DIR))
					{
						_toolchain_dir = toolchain_paths[i];
						found = true;
						break;
					}
				}

				if (!found)
				{
					loge("Unable to find the toolchain directory\n");
					exit_status = 1;
					return true;
				}
			}

			exit_status = 0;
			return false;
		}

		protected override int command_line(ApplicationCommandLine command_line)
		{
			this.activate();
			return 0;
		}

		public ConsoleClient? current_selected_client()
		{
			if (_combo.get_active_id() == "editor")
				return _editor;
			else if (_combo.get_active_id() == "game")
				return _game;
			else
				return null;
		}

		private void on_resource_browser_resource_selected(string type, string name)
		{
			_editor.send_script(LevelEditorApi.set_placeable(type, name));
			activate_action("tool", new GLib.Variant.string("place"));
		}

		private void on_compiler_connected(string address, int port)
		{
			logi("Connected to data_compiler@%s:%d".printf(address, port));
			_compiler.receive_async();
		}

		private void on_compiler_disconnected()
		{
			logi("Disconnected from data_compiler");
		}

		private void on_compiler_disconnected_unexpected()
		{
			on_compiler_disconnected();

			stop_game();
			stop_editor();

			// Reset the callback
			_data_compiler.finished(false);

			_project_slide.show_widget(compiler_crashed_label());
			_editor_slide.show_widget(compiler_crashed_label());
			_inspector_slide.show_widget(compiler_crashed_label());
		}

		private void on_editor_connected(string address, int port)
		{
			logi("Connected to level_editor@%s:%d".printf(address, port));
			_editor.receive_async();
		}

		private void on_editor_disconnected()
		{
			logi("Disconnected from editor");
		}

		private void on_editor_disconnected_unexpected()
		{
			on_editor_disconnected();

			Gtk.Label label = new Gtk.Label(null);
			label.set_markup("Something went wrong.\rTry to <a href=\"restart\">restart</a> this view.");
			label.activate_link.connect(() => {
				activate_action("restart", null);
				return true;
			});
			_editor_slide.show_widget(label);
		}

		private void on_game_connected(string address, int port)
		{
			logi("Connected to game@%s:%d".printf(address, port));
			_game.receive_async();
			_combo.set_active_id("game");
		}

		private void on_game_disconnected()
		{
			logi("Disconnected from game");
			_project.delete_garbage();
			_combo.set_active_id("editor");
			_toolbar_run.icon_name = "game-run";
		}

		private void on_message_received(ConsoleClient client, uint8[] json)
		{
			Hashtable msg = JSON.decode(json) as Hashtable;
			string msg_type = msg["type"] as string;

			if (msg_type == "message")
			{
				log((string)msg["system"], (string)msg["severity"], (string)msg["message"]);
			}
			else if (msg_type == "add_file")
			{
				string path = (string)msg["path"];

				_project.add_file(path);
			}
			else if (msg_type == "remove_file")
			{
				string path = (string)msg["path"];

				_project.remove_file(path);
			}
			else if (msg_type == "add_tree")
			{
				string path = (string)msg["path"];

				_project.add_tree(path);
			}
			else if (msg_type == "remove_tree")
			{
				string path = (string)msg["path"];

				_project.remove_tree(path);
			}
			else if (msg_type == "compile")
			{
				// Guid id = Guid.parse((string)msg["id"]);

				if (msg.has_key("start"))
				{
					// FIXME
				}
				else if (msg.has_key("success"))
				{
					_data_compiler.finished((bool)msg["success"]);
				}
			}
			else if (msg_type == "unit_spawned")
			{
				string id             = (string)           msg["id"];
				string name           = (string)           msg["name"];
				ArrayList<Value?> pos = (ArrayList<Value?>)msg["position"];
				ArrayList<Value?> rot = (ArrayList<Value?>)msg["rotation"];
				ArrayList<Value?> scl = (ArrayList<Value?>)msg["scale"];

				_level.on_unit_spawned(Guid.parse(id)
					, name
					, Vector3.from_array(pos)
					, Quaternion.from_array(rot)
					, Vector3.from_array(scl)
					);
			}
			else if (msg_type == "sound_spawned")
			{
				string id             = (string)           msg["id"];
				string name           = (string)           msg["name"];
				ArrayList<Value?> pos = (ArrayList<Value?>)msg["position"];
				ArrayList<Value?> rot = (ArrayList<Value?>)msg["rotation"];
				ArrayList<Value?> scl = (ArrayList<Value?>)msg["scale"];
				double range          = (double)           msg["range"];
				double volume         = (double)           msg["volume"];
				bool loop             = (bool)             msg["loop"];

				_level.on_sound_spawned(Guid.parse(id)
					, name
					, Vector3.from_array(pos)
					, Quaternion.from_array(rot)
					, Vector3.from_array(scl)
					, range
					, volume
					, loop
					);
			}
			else if (msg_type == "move_objects")
			{
				Hashtable ids           = (Hashtable)msg["ids"];
				Hashtable new_positions = (Hashtable)msg["new_positions"];
				Hashtable new_rotations = (Hashtable)msg["new_rotations"];
				Hashtable new_scales    = (Hashtable)msg["new_scales"];

				ArrayList<string> keys = new ArrayList<string>.wrap(ids.keys.to_array());
				keys.sort(Gee.Functions.get_compare_func_for(typeof(string)));

				Guid[] n_ids             = new Guid[keys.size];
				Vector3[] n_positions    = new Vector3[keys.size];
				Quaternion[] n_rotations = new Quaternion[keys.size];
				Vector3[] n_scales       = new Vector3[keys.size];

				for (int i = 0; i < keys.size; ++i)
				{
					string k = keys[i];

					n_ids[i]       = Guid.parse((string)ids[k]);
					n_positions[i] = Vector3.from_array((ArrayList<Value?>)(new_positions[k]));
					n_rotations[i] = Quaternion.from_array((ArrayList<Value?>)new_rotations[k]);
					n_scales[i]    = Vector3.from_array((ArrayList<Value?>)new_scales[k]);
				}

				_level.on_move_objects(n_ids, n_positions, n_rotations, n_scales);
			}
			else if (msg_type == "selection")
			{
				Hashtable objects = (Hashtable)msg["objects"];

				ArrayList<string> keys = new ArrayList<string>.wrap(objects.keys.to_array());
				keys.sort(Gee.Functions.get_compare_func_for(typeof(string)));

				Guid[] ids = new Guid[keys.size];

				for (int i = 0; i < keys.size; ++i)
				{
					string k = keys[i];
					ids[i] = Guid.parse((string)objects[k]);
				}

				_level.on_selection(ids);
			}
			else if (msg_type == "error")
			{
				loge((string)msg["message"]);
			}
			else
			{
				loge("Unknown message type: " + msg_type);
			}

			// Receive next message
			client.receive_async();
		}

		private void send_state()
		{
			StringBuilder sb = new StringBuilder();
			sb.append(LevelEditorApi.set_grid_size(_grid_size));
			sb.append(LevelEditorApi.set_rotation_snap(_rotation_snap));
			sb.append(LevelEditorApi.enable_show_grid(_show_grid));
			sb.append(LevelEditorApi.enable_snap_to_grid(_snap_to_grid));
			sb.append(LevelEditorApi.enable_debug_render_world(_debug_render_world));
			sb.append(LevelEditorApi.enable_debug_physics_world(_debug_physics_world));
			sb.append(LevelEditorApi.set_tool_type(_tool_type));
			sb.append(LevelEditorApi.set_snap_mode(_snap_mode));
			sb.append(LevelEditorApi.set_reference_system(_reference_system));
			_editor.send_script(sb.str);
		}

		private bool on_button_press(EventButton ev)
		{
			return true;
		}

		private bool on_button_release(EventButton ev)
		{
			return true;
		}

		Gtk.Widget starting_compiler_label()
		{
			return new Gtk.Label("Compiling resources, please wait...");
		}

		Gtk.Widget compiler_crashed_label()
		{
			Gtk.Label label = new Gtk.Label(null);
			label.set_markup("Data Compiler disconnected.\rTry to <a href=\"restart\">restart</a> compiler to continue.");
			label.activate_link.connect(() => {
				restart_compiler();
				return true;
			});

			return label;
		}

		Gtk.Widget compiler_failed_compilation_label()
		{
			Gtk.Label label = new Gtk.Label(null);
			label.set_markup("Data compilation failed.\rFix errors and <a href=\"restart\">restart</a> compiler to continue.");
			label.activate_link.connect(() => {
				restart_compiler();
				return true;
			});

			return label;
		}

		private void restart_compiler()
		{
			stop_compiler();

			_project.reset();

			_project_slide.show_widget(starting_compiler_label());
			_editor_slide.show_widget(starting_compiler_label());
			_inspector_slide.show_widget(starting_compiler_label());

			string args[] =
			{
				ENGINE_EXE,
				"--source-dir", _project.source_dir(),
				"--data-dir", _project.data_dir(),
				"--map-source-dir", "core", _project.toolchain_dir(),
				"--server",
				"--wait-console",
				null
			};

			GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
			sl.set_cwd(ENGINE_DIR);
			try
			{
				_compiler_process = sl.spawnv(args);
			}
			catch (Error e)
			{
				loge(e.message);
			}

			// It is an error if compiler disconnects after here.
			_compiler.disconnected.disconnect(on_compiler_disconnected);
			_compiler.disconnected.connect(on_compiler_disconnected_unexpected);

			for (int tries = 0; !_compiler.is_connected() && tries < 5; ++tries)
			{
				_compiler.connect("127.0.0.1", CROWN_DEFAULT_SERVER_PORT);
				GLib.Thread.usleep(250*1000);
			}

			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				if (_data_compiler.compile.end(res))
				{
					restart_editor();

					_project_slide.show_widget(_project_browser);
					_inspector_slide.show_widget(_inspector_pane);
				}
				else
				{
					_project_slide.show_widget(compiler_failed_compilation_label());
					_editor_slide.show_widget(compiler_failed_compilation_label());
					_inspector_slide.show_widget(compiler_failed_compilation_label());
				}
			});
		}

		private void stop_compiler()
		{
			stop_game();
			stop_editor();

			if (_compiler != null)
			{
				// Explicit call to this function should not produce error messages.
				_compiler.disconnected.disconnect(on_compiler_disconnected_unexpected);
				_compiler.disconnected.connect(on_compiler_disconnected);

				_compiler.send(DataCompilerApi.quit());
				_compiler.close();
			}

			if (_compiler_process != null)
			{
				try
				{
					_compiler_process.wait();
				}
				catch (Error e)
				{
					loge(e.message);
				}
			}
		}

		private void start_editor(uint window_xid)
		{
			if (window_xid == 0)
				return;

			string args[] =
			{
				ENGINE_EXE,
				"--data-dir", _project.data_dir(),
				"--boot-dir", LEVEL_EDITOR_BOOT_DIR,
				"--parent-window", window_xid.to_string(),
				"--wait-console",
				null
			};

			GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
			sl.set_cwd(ENGINE_DIR);
			try
			{
				_editor_process = sl.spawnv(args);
			}
			catch (Error e)
			{
				loge(e.message);
			}

			// It is an error if editor disconnects after here.
			_editor.disconnected.disconnect(on_editor_disconnected);
			_editor.disconnected.connect(on_editor_disconnected_unexpected);

			for (int tries = 0; !_editor.is_connected() && tries < 10; ++tries)
			{
				_editor.connect("127.0.0.1", 10001);
				GLib.Thread.usleep(500*1000);
			}

			_level.send_level();
			send_state();
			_preferences_dialog.apply();
		}

		private void stop_editor()
		{
			_resource_chooser.stop_editor();

			if (_editor != null)
			{
				// Explicit call to this function should not produce error messages.
				_editor.disconnected.disconnect(on_editor_disconnected_unexpected);
				_editor.disconnected.connect(on_editor_disconnected);

				_editor.send_script("Device.quit()");
				_editor.close();
			}

			if (_editor_process != null)
			{
				try
				{
					_editor_process.wait();
				}
				catch (Error e)
				{
					loge(e.message);
				}
			}

			_editor_slide.show_widget(new Gtk.Label("Disconnected."));
		}

		private void restart_editor()
		{
			stop_editor();

			if (_editor_view != null)
			{
				_editor_view_overlay.remove(_editor_view);
				_editor_view = null;
			}

			_editor_view = new EditorView(_editor);
			_editor_view.realized.connect(on_editor_view_realized);
			_editor_view.button_press_event.connect(on_button_press);
			_editor_view.button_release_event.connect(on_button_release);

			_editor_view_overlay.add(_editor_view);
			_editor_slide.show_widget(_editor_view_overlay);

			_resource_chooser.restart_editor();
		}

		private void start_game(StartGame sg)
		{
			_project.dump_test_level(_database);

			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				if (_data_compiler.compile.end(res))
				{
					string args[] =
					{
						ENGINE_EXE,
						"--data-dir", _project.data_dir(),
						"--console-port", "12345",
						"--wait-console",
						"--lua-string", sg == StartGame.TEST ? "TEST=true" : "",
						null
					};

					GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
					sl.set_cwd(ENGINE_DIR);

					try
					{
						_game_process = sl.spawnv(args);
					}
					catch (Error e)
					{
						loge(e.message);
					}

					for (int tries = 0; !_game.is_connected() && tries < 10; ++tries)
					{
						_game.connect("127.0.0.1", 12345);
						GLib.Thread.usleep(500*1000);
					}
				}
				else
				{
					_toolbar_run.icon_name = "game-run";
				}
			});
		}

		private void stop_game()
		{
			if (_game != null)
			{
				_game.send_script("Device.quit()");
				_game.close();
			}

			if (_game_process != null)
			{
				try
				{
					_game_process.wait();
				}
				catch (Error e)
				{
					loge(e.message);
				}
			}
		}

		private void deploy_game()
		{
			Gtk.FileChooserDialog fcd = new Gtk.FileChooserDialog("Select destination directory..."
				, this.active_window
				, FileChooserAction.SELECT_FOLDER
				, "Cancel"
				, ResponseType.CANCEL
				, "Open"
				, ResponseType.ACCEPT
				);

			if (fcd.run() == (int)ResponseType.ACCEPT)
			{
				GLib.File data_dir = File.new_for_path(fcd.get_filename());

				string args[] =
				{
					ENGINE_EXE,
					"--source-dir", _project.source_dir(),
					"--map-source-dir", "core", _project.toolchain_dir(),
					"--data-dir", data_dir.get_path(),
					"--compile",
					null
				};

				GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
				sl.set_cwd(ENGINE_DIR);
				try
				{
					GLib.Subprocess compiler = sl.spawnv(args);
					compiler.wait();
					if (compiler.get_exit_status() == 0)
					{
						string game_name = DEPLOY_DEFAULT_NAME;
						GLib.File engine_exe_src = File.new_for_path(DEPLOY_EXE);
						GLib.File engine_exe_dst = File.new_for_path(Path.build_filename(data_dir.get_path(), game_name + EXE_SUFFIX));
						engine_exe_src.copy(engine_exe_dst, FileCopyFlags.OVERWRITE);

#if CROWN_PLATFORM_WINDOWS
						string lua51_name = "lua51.dll";
						GLib.File lua51_dll_src = File.new_for_path(lua51_name);
						GLib.File lua51_dll_dst = File.new_for_path(Path.build_filename(data_dir.get_path(), lua51_name));
						lua51_dll_src.copy(lua51_dll_dst, FileCopyFlags.OVERWRITE);

						string openal_name = "openal-release.dll";
						GLib.File openal_dll_src = File.new_for_path(openal_name);
						GLib.File openal_dll_dst = File.new_for_path(Path.build_filename(data_dir.get_path(), openal_name));
						openal_dll_src.copy(openal_dll_dst, FileCopyFlags.OVERWRITE);
#endif // CROWN_PLATFORM_WINDOWS

						logi("Project deployed to `%s`".printf(data_dir.get_path()));
					}
				}
				catch (Error e)
				{
					logi("%s".printf(e.message));
					logi("Failed to deploy project");
				}
			}

			fcd.destroy();
		}

		private void on_editor_view_realized()
		{
			start_editor(_editor_view.window_id);
		}

		private void on_tool_changed(GLib.SimpleAction action, GLib.Variant? param)
		{
			string name = param.get_string();
			if (name == "place")
				_tool_type = ToolType.PLACE;
			else if (name == "move")
				_tool_type = ToolType.MOVE;
			else if (name == "rotate")
				_tool_type = ToolType.ROTATE;
			else if (name == "scale")
				_tool_type = ToolType.SCALE;

			send_state();
			action.set_state(param);
		}

		private void on_snap_mode_changed(GLib.SimpleAction action, GLib.Variant? param)
		{
			string name = param.get_string();
			if (name == "relative")
				_snap_mode = SnapMode.RELATIVE;
			else if (name == "absolute")
				_snap_mode = SnapMode.ABSOLUTE;

			send_state();
			action.set_state(param);
		}

		private void on_reference_system_changed(GLib.SimpleAction action, GLib.Variant? param)
		{
			string name = param.get_string();
			if (name == "local")
				_reference_system = ReferenceSystem.LOCAL;
			else if (name == "world")
				_reference_system = ReferenceSystem.WORLD;

			send_state();
			action.set_state(param);
		}

		private void on_grid_changed(GLib.SimpleAction action, GLib.Variant? param)
		{
			_grid_size = float.parse(param.get_string());
			send_state();
			action.set_state(param);
		}

		private void on_rotation_snap_changed(GLib.SimpleAction action, GLib.Variant? param)
		{
			_rotation_snap = float.parse(param.get_string());
			send_state();
			action.set_state(param);
		}

		private void new_level()
		{
			_level.load_empty_level();
			_level.send_level();
		}

		private void load_level(string level)
		{
			string filename = level;

			if (filename == "")
			{
				Gtk.FileChooserDialog fcd = new Gtk.FileChooserDialog("Open Level..."
					, this.active_window
					, FileChooserAction.OPEN
					, "Cancel"
					, ResponseType.CANCEL
					, "Open"
					, ResponseType.ACCEPT
					);
				fcd.add_filter(_file_filter);
				fcd.set_current_folder(_project.source_dir());

				if (fcd.run() == (int)ResponseType.ACCEPT)
					filename = fcd.get_filename();

				fcd.destroy();
			}

			if (filename == "")
				return;

			if (!_project.path_is_within_dir(filename, _project.source_dir()))
			{
				loge("File must be within `%s`".printf(_project.source_dir()));
				return;
			}

			if (filename.has_suffix(".level") && filename != _level._filename)
			{
				_level.load(filename);
				_level.send_level();
				send_state();
			}
		}

		private void load_project()
		{
			Gtk.FileChooserDialog fcd = new Gtk.FileChooserDialog("Open Project..."
				, this.active_window
				, FileChooserAction.SELECT_FOLDER
				, "Cancel"
				, ResponseType.CANCEL
				, "Open"
				, ResponseType.ACCEPT
				);

			int rt = fcd.run();
			if (rt != (int)ResponseType.ACCEPT)
			{
				fcd.destroy();
				return;
			}

			string filename = fcd.get_filename();
			fcd.destroy();

			if (filename == _project.source_dir())
				return;

			logi("Loading `%s`...".printf(filename));
			_project.load(filename, _project.toolchain_dir());

			_level.load_empty_level();

			restart_compiler();
		}

		private bool save_as(string? filename)
		{
			string path;

			if (filename != null)
			{
				path = filename;
			}
			else
			{
				Gtk.FileChooserDialog fcd = new Gtk.FileChooserDialog("Save As..."
					, this.active_window
					, FileChooserAction.SAVE
					, "Cancel"
					, ResponseType.CANCEL
					, "Save"
					, ResponseType.ACCEPT
					);
				fcd.add_filter(_file_filter);
				fcd.set_current_folder(_project.source_dir());
				int rt = fcd.run();

				if (rt != (int)ResponseType.ACCEPT)
				{
					fcd.destroy();
					return false;
				}

				path = fcd.get_filename();
				fcd.destroy();
			}

			if (!_project.path_is_within_dir(path, _project.source_dir()))
			{
				loge("File must be within `%s`".printf(_project.source_dir()));
				return false;
			}

			_level.save(path.has_suffix(".level") ? path : path + ".level");
			_statusbar.set_temporary_message("Saved %s".printf(_level._filename));
			return true;
		}

		private bool save()
		{
			return save_as(_level._filename);
		}

		private bool save_timeout()
		{
			if (_level._filename != null)
				save();

			return true;
		}

		public void close_all()
		{
			save_settings();

			if (_save_timer_id > 0)
				GLib.Source.remove(_save_timer_id);

			if (_resource_chooser != null)
				_resource_chooser.destroy();

			if (_preferences_dialog != null)
				_preferences_dialog.destroy();

			stop_compiler();
		}

		protected override void shutdown()
		{
			base.shutdown();
		}

		// Returns true if the level has been saved or the user decided it
		// should be discarded.
		public bool should_quit()
		{
			if (!_database.changed())
				return true;

			Gtk.MessageDialog md = new Gtk.MessageDialog(this.active_window
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("Quit _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
				return true;

			return false;
		}

		private void on_new_level(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (!_database.changed())
			{
				new_level();
				send_state();
				return;
			}

			Gtk.MessageDialog md = new Gtk.MessageDialog(this.active_window
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("New _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
			{
				new_level();
				send_state();
			}
		}

		private void on_open_level(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (!_database.changed())
			{
				load_level(param.get_string());
				return;
			}

			Gtk.MessageDialog md = new Gtk.MessageDialog(this.active_window
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("Open _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
				load_level(param.get_string());
		}

		private void on_open_project(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (!_database.changed())
			{
				load_project();
				return;
			}

			Gtk.MessageDialog md = new Gtk.MessageDialog(this.active_window
				, Gtk.DialogFlags.MODAL
				, Gtk.MessageType.WARNING
				, Gtk.ButtonsType.NONE
				, "File changed, save?"
				);
			md.add_button("Open _without Saving", ResponseType.NO);
			md.add_button("_Cancel", ResponseType.CANCEL);
			md.add_button("_Save", ResponseType.YES);
			md.set_default_response(ResponseType.YES);
			int rt = md.run();
			md.destroy();

			if (rt == (int)ResponseType.YES && save() || rt == (int)ResponseType.NO)
				load_project();
		}

		private void on_save(GLib.SimpleAction action, GLib.Variant? param)
		{
			save();
		}

		private void on_save_as(GLib.SimpleAction action, GLib.Variant? param)
		{
			save_as(null);
		}

		private void on_import(GLib.SimpleAction action, GLib.Variant? param)
		{
			_project.import(null, this.active_window);
		}

		private void on_preferences(GLib.SimpleAction action, GLib.Variant? param)
		{
			_preferences_dialog.show_all();
		}

		private void on_deploy(GLib.SimpleAction action, GLib.Variant? param)
		{
			deploy_game();
		}

		private void on_quit(GLib.SimpleAction action, GLib.Variant? param)
		{
			this.active_window.close();
		}

		private void on_show_grid(GLib.SimpleAction action, GLib.Variant? param)
		{
			_show_grid = !action.get_state().get_boolean();
			send_state();
			action.set_state(new GLib.Variant.boolean(_show_grid));
		}

		private void on_custom_grid()
		{
			Gtk.Dialog dg = new Gtk.Dialog.with_buttons("Grid size"
				, this.active_window
				, DialogFlags.MODAL
				, "Cancel"
				, ResponseType.CANCEL
				, "Ok"
				, ResponseType.OK
				, null
				);

			EntryDouble sb = new EntryDouble(_grid_size, 0.1, 1000);
			sb.activate.connect(() => { dg.response(ResponseType.OK); });
			dg.get_content_area().add(sb);
			dg.skip_taskbar_hint = true;
			dg.show_all();

			if (dg.run() == (int)ResponseType.OK)
			{
				_grid_size = sb.value;
				send_state();
			}

			dg.destroy();
		}

		private void on_rotation_snap(GLib.SimpleAction action, GLib.Variant? param)
		{
			Gtk.Dialog dg = new Gtk.Dialog.with_buttons("Rotation snap"
				, this.active_window
				, DialogFlags.MODAL
				, "Cancel"
				, ResponseType.CANCEL
				, "Ok"
				, ResponseType.OK
				, null
				);

			EntryDouble sb = new EntryDouble(_rotation_snap, 1.0, 180.0);
			sb.activate.connect(() => { dg.response(ResponseType.OK); });
			dg.get_content_area().add(sb);
			dg.skip_taskbar_hint = true;
			dg.show_all();

			if (dg.run() == (int)ResponseType.OK)
			{
				_rotation_snap = sb.value;
				send_state();
			}

			dg.destroy();
		}

		private void on_create_primitive(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (action.name == "primitive-cube")
				_editor.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/cube"));
			else if (action.name == "primitive-sphere")
				_editor.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/sphere"));
			else if (action.name == "primitive-cone")
				_editor.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/cone"));
			else if (action.name == "primitive-cylinder")
				_editor.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/cylinder"));
			else if (action.name == "primitive-plane")
				_editor.send_script(LevelEditorApi.set_placeable("unit", "core/units/primitives/plane"));
			else if (action.name == "camera")
				_editor.send_script(LevelEditorApi.set_placeable("unit", "core/units/camera"));
			else if (action.name == "light")
				_editor.send_script(LevelEditorApi.set_placeable("unit", "core/units/light"));
			else if (action.name == "sound-source")
				_editor.send_script(LevelEditorApi.set_placeable("sound", ""));

			activate_action("tool", new GLib.Variant.string("place"));
		}

		private void on_camera_view(GLib.SimpleAction action, GLib.Variant? param)
		{
			string name = param.get_string();

			if (name == "perspective")
				_editor.send_script("LevelEditor:camera_view_perspective()");
			else if (name == "front")
				_editor.send_script("LevelEditor:camera_view_front()");
			else if (name == "back")
				_editor.send_script("LevelEditor:camera_view_back()");
			else if (name == "right")
				_editor.send_script("LevelEditor:camera_view_right()");
			else if (name == "left")
				_editor.send_script("LevelEditor:camera_view_left()");
			else if (name == "top")
				_editor.send_script("LevelEditor:camera_view_top()");
			else if (name == "bottom")
				_editor.send_script("LevelEditor:camera_view_bottom()");

			action.set_state(param);
		}

		private void on_resource_chooser(GLib.SimpleAction action, GLib.Variant? param)
		{
			_resource_popover.show_all();
		}

		private void on_project_browser(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (_project_slide.is_visible())
			{
				_project_slide.hide();
			}
			else
			{
				_project_slide.show_all();
			}
		}

		private void on_console(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (_console_view.is_visible())
			{
				if (_console_view._entry.has_focus)
					_console_view.hide();
				else
					_console_view._entry.grab_focus();
			}
			else
			{
				_console_view.show_all();
			}
		}

		private void on_statusbar(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (_statusbar.is_visible())
			{
				_statusbar.hide();
			}
			else
			{
				_statusbar.show_all();
			}
		}

		private void on_inspector(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (_inspector_slide.is_visible())
			{
				_inspector_slide.hide();
			}
			else
			{
				_inspector_slide.show_all();
			}
		}

		private void on_editor_restart(GLib.SimpleAction action, GLib.Variant? param)
		{
			restart_editor();
		}

		private void on_build_data(GLib.SimpleAction action, GLib.Variant? param)
		{
			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				_data_compiler.compile.end(res);
			});
		}

		private void on_refresh_lua(GLib.SimpleAction action, GLib.Variant? param)
		{
			_data_compiler.compile.begin(_project.data_dir(), _project.platform(), (obj, res) => {
				if (_data_compiler.compile.end(res))
				{
					_editor.send(DeviceApi.refresh());
					_game.send(DeviceApi.refresh());
				}
			});
		}

		private void on_snap_to_grid(GLib.SimpleAction action, GLib.Variant? param)
		{
			_snap_to_grid = !action.get_state().get_boolean();
			send_state();
			action.set_state(new GLib.Variant.boolean(_snap_to_grid));
		}

		private void on_debug_render_world(GLib.SimpleAction action, GLib.Variant? param)
		{
			_debug_render_world = !action.get_state().get_boolean();
			send_state();
			action.set_state(new GLib.Variant.boolean(_debug_render_world));
		}

		private void on_debug_physics_world(GLib.SimpleAction action, GLib.Variant? param)
		{
			_debug_physics_world = !action.get_state().get_boolean();
			send_state();
			action.set_state(new GLib.Variant.boolean(_debug_physics_world));
		}

		private void on_run_game(GLib.SimpleAction action, GLib.Variant? param)
		{
			if (_game.is_connected())
			{
				stop_game();
			}
			else
			{
				// Always change icon state regardless of failures
				_toolbar_run.icon_name = "game-stop";
				start_game(action.name == "test-level" ? StartGame.TEST : StartGame.NORMAL);
			}
		}

		private void on_undo(GLib.SimpleAction action, GLib.Variant? param)
		{
			int id = _database.undo();
			if (id != -1)
				_statusbar.set_temporary_message("Undo: " + ActionNames[id]);
		}

		private void on_redo(GLib.SimpleAction action, GLib.Variant? param)
		{
			int id = _database.redo();
			if (id != -1)
				_statusbar.set_temporary_message("Redo: " + ActionNames[id]);
		}

		private void on_duplicate(GLib.SimpleAction action, GLib.Variant? param)
		{
			_level.duplicate_selected_objects();
		}

		private void on_delete(GLib.SimpleAction action, GLib.Variant? param)
		{
			_level.destroy_selected_objects();
		}

		private void on_manual(GLib.SimpleAction action, GLib.Variant? param)
		{
			try
			{
				AppInfo.launch_default_for_uri("https://dbartolini.github.io/crown/html/v" + CROWN_VERSION, null);
			}
			catch (Error e)
			{
				loge(e.message);
			}
		}

		private void on_report_issue(GLib.SimpleAction action, GLib.Variant? param)
		{
			try
			{
				AppInfo.launch_default_for_uri("https://github.com/dbartolini/crown/issues", null);
			}
			catch (Error e)
			{
				loge(e.message);
			}
		}

		private void on_browse_logs(GLib.SimpleAction action, GLib.Variant? param)
		{
			open_directory(_logs_dir.get_path());
		}

		private void on_changelog(GLib.SimpleAction action, GLib.Variant? param)
		{
			try
			{
				AppInfo.launch_default_for_uri("https://dbartolini.github.io/crown/html/v" + CROWN_VERSION + "/changelog.html", null);
			}
			catch (Error e)
			{
				loge(e.message);
			}
		}

		private void on_about(GLib.SimpleAction action, GLib.Variant? param)
		{
			Gtk.AboutDialog dlg = new Gtk.AboutDialog();
			dlg.set_destroy_with_parent(true);
			dlg.set_transient_for(this.active_window);
			dlg.set_modal(true);
			dlg.set_logo_icon_name("pepper");

			dlg.program_name = "Crown Game Engine";
			dlg.version = CROWN_VERSION;
			dlg.website = "https://github.com/dbartolini/crown";
			dlg.copyright = "Copyright (c) 2012-2020 Daniele Bartolini and individual contributors.";
			dlg.license = "Crown Game Engine.\n"
				+ "Copyright (c) 2012-2020 Daniele Bartolini and individual contributors.\n"
				+ "\n"
				+ "This program is free software; you can redistribute it and/or\n"
				+ "modify it under the terms of the GNU General Public License\n"
				+ "as published by the Free Software Foundation; either version 2\n"
				+ "of the License, or (at your option) any later version.\n"
				+ "\n"
				+ "This program is distributed in the hope that it will be useful,\n"
				+ "but WITHOUT ANY WARRANTY; without even the implied warranty of\n"
				+ "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the\n"
				+ "GNU General Public License for more details.\n"
				+ "\n"
				+ "You should have received a copy of the GNU General Public License\n"
				+ "along with this program; if not, write to the Free Software\n"
				+ "Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.\n"
				;
			dlg.run();
			dlg.destroy();
		}

		public void set_autosave_timer(uint minutes)
		{
			if (_save_timer_id > 0)
				GLib.Source.remove(_save_timer_id);

			_save_timer_id = GLib.Timeout.add_seconds(minutes*60, save_timeout);
		}
	}

	// Global paths
	public static GLib.File _config_dir;
	public static GLib.File _logs_dir;
	public static GLib.File _log_file;
	public static GLib.File _settings_file;

	public static GLib.FileStream _log_stream;
	public static ConsoleView _console_view;

	public static void log(string system, string severity, string message)
	{
		GLib.DateTime now = new GLib.DateTime.now_utc();
		string line = "%s.%06d  %.4s %s: %s\n".printf(now.format("%H:%M:%S")
			, now.get_microsecond()
			, severity.ascii_up()
			, system
			, message
			);

		if (_log_stream != null)
		{
			_log_stream.puts(line);
			_log_stream.flush();
		}

		if (_console_view != null)
			_console_view.log(severity, line);
	}

	public static void logi(string message)
	{
		log("editor", "info", message);
	}

	public static void logw(string message)
	{
		log("editor", "warning", message);
	}

	public static void loge(string message)
	{
		log("editor", "error", message);
	}

	public void open_directory(string directory)
	{
#if CROWN_PLATFORM_LINUX
		try
		{
			GLib.AppInfo.launch_default_for_uri("file://" + directory, null);
		}
		catch (Error e)
		{
			loge(e.message);
		}
#else
		GLib.SubprocessLauncher sl = new GLib.SubprocessLauncher(subprocess_flags());
		try
		{
			sl.spawnv({ "explorer.exe", directory, null });
		}
		catch (Error e)
		{
			loge(e.message);
		}
#endif
	}

	public static GLib.SubprocessFlags subprocess_flags()
	{
		GLib.SubprocessFlags flags = SubprocessFlags.NONE;
#if !CROWN_DEBUG
		flags |= SubprocessFlags.STDOUT_SILENCE | SubprocessFlags.STDERR_SILENCE;
#endif
		return flags;
	}

	public static int main(string[] args)
	{
		Intl.setlocale(LocaleCategory.ALL, "C");

		// Global paths
		_config_dir = GLib.File.new_for_path(GLib.Path.build_filename(GLib.Environment.get_user_config_dir(), "crown"));
		try { _config_dir.make_directory(); } catch (Error e) { /* Nobody cares */ }
		_logs_dir = GLib.File.new_for_path(GLib.Path.build_filename(_config_dir.get_path(), "logs"));
		try { _logs_dir.make_directory(); } catch (Error e) { /* Nobody cares */ }

		_log_file = GLib.File.new_for_path(GLib.Path.build_filename(_logs_dir.get_path(), new GLib.DateTime.now_utc().format("%Y-%m-%d") + ".log"));
		_settings_file = GLib.File.new_for_path(GLib.Path.build_filename(_config_dir.get_path(), "settings.sjson"));

		_log_stream = GLib.FileStream.open(_log_file.get_path(), "a");

		LevelEditorApplication app = new LevelEditorApplication();
		return app.run(args);
	}
}