add dirty bit to deck renderer

graph_node_renderer/deck_holder_renderer.gd

@@ -110,6 +110,7 @@ func add_empty_deck() -> void:
 	tab_container.add_content(inst, "<unsaved deck>")
 	tab_container.set_tab_metadata(tab_container.get_current_tab(), "id", deck.id)
 	inst.group_enter_requested.connect(_on_deck_renderer_group_enter_requested)
+	inst.dirty_state_changed.connect(_on_deck_renderer_dirty_state_changed.bind(inst))
 
 ## Closes the current tab in [member tab_container]
 func close_current_tab() -> void:
@@ -143,6 +144,8 @@ func _on_file_dialog_save_file(path: String) -> void:
 
 	deck.save_path = path
 	tab_container.set_tab_title(tab_container.get_current_tab(), path.get_file())
+	var renderer: DeckRendererGraphEdit = tab_container.get_content(tab_container.get_current_tab()) as DeckRendererGraphEdit
+	renderer.dirty = false
 	# TODO: put this into DeckHolder instead
 	var json := JSON.stringify(deck.to_dict(), "\t")
 	var f := FileAccess.open(path, FileAccess.WRITE)
@@ -170,6 +173,7 @@ func open_deck_at_path(path: String) -> void:
 	tab_container.set_tab_metadata(tab_container.get_current_tab(), "id", deck.id)
 	inst.initialize_from_deck()
 	inst.group_enter_requested.connect(_on_deck_renderer_group_enter_requested)
+	inst.dirty_state_changed.connect(_on_deck_renderer_dirty_state_changed.bind(inst))
 	add_recent_file(path)
 
 ## Gets the currently active [Deck] from [member tab_container]
@@ -188,6 +192,7 @@ func save_active_deck() -> void:
 		var f := FileAccess.open(get_active_deck().save_path, FileAccess.WRITE)
 		f.store_string(json)
 		add_recent_file(get_active_deck().save_path)
+		(tab_container.get_content(tab_container.get_current_tab()) as DeckRendererGraphEdit).dirty = false
 
 ## Disconnects the [FileDialog] signals if they are already connected.
 func disconnect_file_dialog_signals() -> void:
@@ -266,6 +271,18 @@ func _on_debug_decks_viewer_item_pressed(deck_id: String, instance_id: String) -
 		inst.group_enter_requested.connect(_on_deck_renderer_group_enter_requested)
 
 
+func _on_deck_renderer_dirty_state_changed(renderer: DeckRendererGraphEdit) -> void:
+	var idx: int = range(tab_container.get_tab_count()).filter(
+		func(x: int):
+			return tab_container.get_content(x) == renderer
+	)[0]
+	var title := tab_container.get_tab_title(idx).trim_suffix("(*)")
+	if renderer.dirty:
+		tab_container.set_tab_title(idx, "%s(*)" % title)
+	else:
+		tab_container.set_tab_title(idx, title.trim_suffix("(*)"))
+
+
 func add_recent_file(path: String) -> void:
 	var item := recent_files.find(path)
 	if item == -1:

graph_node_renderer/deck_node_renderer_graph_node.gd

@@ -28,6 +28,7 @@ func _on_position_offset_changed() -> void:
 	node.position.x = position_offset.x
 	node.position.y = position_offset.y
 	node.position_updated.emit(node.position)
+	(get_parent() as DeckRendererGraphEdit).dirty = true
 
 ## Connected to [member node]s [signal position_updated] to keep parity with the
 ## data position.
@@ -36,6 +37,7 @@ func _on_node_position_updated(new_position: Dictionary) -> void:
 	position_offset.x = new_position.x
 	position_offset.y = new_position.y
 	position_offset_changed.connect(_on_position_offset_changed)
+	(get_parent() as DeckRendererGraphEdit).dirty = true
 
 
 ## Connected to [member node]s [signal port_added] handles setting up the specified

graph_node_renderer/deck_renderer_graph_edit.gd

@@ -30,6 +30,14 @@ var deck: Deck:
 ## Emits when Group creation is requested.  Ex. Hitting the "group_nodes" Hotkey.
 signal group_enter_requested(group_id: String)
 
+var dirty: bool = false:
+	set(v):
+		dirty = v
+		dirty_state_changed.emit()
+var is_group: bool = false
+
+signal dirty_state_changed
+
 ## Sets up the [member search_popup_panel] with an instance of [member ADD_NODE_SCENE]
 ## stored in [member add_node_menu].  And sets its size of [member search_popup_panel] to
 ## [member add_node_popup_size]
@@ -70,6 +78,7 @@ func attempt_connection(from_node_name: StringName, from_port: int, to_node_name
 				to_node_renderer.name,
 				to_port
 			)
+		dirty = true
 
 ## Receives [signal GraphEdit.disconnection_request] and attempts to disconnect the two [DeckNode]s
 ## involved, utilizes [NodeDB] for accessing them.
@@ -88,6 +97,7 @@ func attempt_disconnect(from_node_name: StringName, from_port: int, to_node_name
 				to_node_renderer.name,
 				to_port
 			)
+	dirty = true
 
 ## Returns the associated [DeckNodeRendererGraphNode] for the supplied [DeckNode].
 ## Or [code]null[/code] if none is found.
@@ -109,6 +119,8 @@ func initialize_from_deck() -> void:
 
 	scroll_offset = deck.get_meta("offset", Vector2())
 
+	is_group = deck.is_group
+	dirty = false
 	for node_id in deck.nodes:
 		var node_renderer: DeckNodeRendererGraphNode = NODE_SCENE.instantiate()
 		node_renderer.node = deck.nodes[node_id]
@@ -152,6 +164,7 @@ func _on_deck_node_added(node: DeckNode) -> void:
 	inst.node = node
 	add_child(inst)
 	inst.position_offset = inst.node.position_as_vector2()
+	dirty = true
 
 
 ## Connected to [signal Deck.node_added], used to remove the specified
@@ -163,6 +176,7 @@ func _on_deck_node_removed(node: DeckNode) -> void:
 
 		renderer.queue_free()
 		break
+	dirty = true
 
 ## Utility function that gets all [DeckNodeRenderGraphNode]s that are selected
 ## See [member GraphNode.selected]
@@ -212,6 +226,7 @@ func _on_rename_popup_rename_confirmed(new_name: String) -> void:
 	var node: DeckNodeRendererGraphNode = get_selected_nodes()[0]
 	node.title = new_name
 	node.node.rename(new_name)
+	dirty = true
 
 
 func _on_rename_popup_closed() -> void:
@@ -250,10 +265,14 @@ func _on_delete_nodes_request(nodes: Array[StringName]) -> void:
 
 	clear_connections()
 	
+	if node_ids.is_empty():
+		return
+
 	for node_id in node_ids:
 		deck.remove_node(node_id, true)
 
 	refresh_connections()
+	dirty = true
 
 
 func _on_copy_nodes_request() -> void:
@@ -282,6 +301,7 @@ func _on_paste_nodes_request() -> void:
 	deck.paste_nodes_from_json(clip, node_pos)
 
 	refresh_connections()
+	dirty = true
 
 
 func _on_duplicate_nodes_request() -> void:
@@ -300,6 +320,7 @@ func _on_duplicate_nodes_request() -> void:
 	deck.duplicate_nodes(selected_ids)
 
 	refresh_connections()
+	dirty = true
 
 
 class RenamePopup extends Popup:

graph_node_renderer/tab_container_custom.gd

@@ -71,6 +71,11 @@ func add_content(c: Node, tab_title: String) -> void:
 func set_tab_title(tab_idx: int, title: String) -> void:
 	tab_bar.set_tab_title(tab_idx, title)
 
+
+func get_tab_title(tab_idx: int) -> String:
+	return tab_bar.get_tab_title(tab_idx)
+
+
 ## Returns the number of tabs.
 func get_tab_count() -> int:
 	return tab_bar.tab_count