Implement proper timeline ending logic (#2536)

* Adjust clear event to only await music fade if music is playing

* Implement dialog ending timeline

This timeline (by default just a [clear] event) plays when dialog ends (or end_timeline() is called).

* Make sure instant clear event is actually instant

addons/dialogic/Core/DialogicGameHandler.gd

@@ -70,6 +70,10 @@ var paused := false:
 
 			dialogic_resumed.emit()
 
+## A timeline that will be played when dialog ends.
+## By default this timeline only contains a clear event.
+var dialog_ending_timeline: DialogicTimeline
+
 ## Emitted when [member paused] changes to `true`.
 signal dialogic_paused
 ## Emitted when [member paused] changes to `false`.
@@ -158,6 +162,9 @@ func _ready() -> void:
 
 	clear()
 
+	dialog_ending_timeline = DialogicTimeline.new()
+	dialog_ending_timeline.from_text("[clear]")
+
 
 #region TIMELINE & EVENT HANDLING
 ################################################################################
@@ -242,9 +249,22 @@ func preload_timeline(timeline_resource:Variant) -> Variant:
 
 
 ## Clears and stops the current timeline.
-func end_timeline() -> void:
+## If [param skip_ending] is `true`, the dialog_ending_timeline is not getting played
+func end_timeline(skip_ending := false) -> void:
+	if not skip_ending and dialog_ending_timeline and current_timeline != dialog_ending_timeline:
+		start(dialog_ending_timeline)
+		return
+
 	await clear(ClearFlags.TIMELINE_INFO_ONLY)
-	_on_timeline_ended()
+
+	if Styles.has_active_layout_node() and Styles.get_layout_node().is_inside_tree():
+		match ProjectSettings.get_setting('dialogic/layout/end_behaviour', 0):
+			0:
+				Styles.get_layout_node().get_parent().remove_child(Styles.get_layout_node())
+				Styles.get_layout_node().queue_free()
+			1:
+				Styles.get_layout_node().hide()
+
 	timeline_ended.emit()
 
 
@@ -368,7 +388,7 @@ func load_full_state(state_info:Dictionary) -> void:
 	if current_state_info.get('current_timeline', null):
 		start_timeline(current_state_info.current_timeline, current_state_info.get('current_event_idx', 0))
 	else:
-		end_timeline.call_deferred()
+		end_timeline.call_deferred(true)
 #endregion
 
 
@@ -413,16 +433,6 @@ func add_subsystem(subsystem_name:String, script_path:String) -> DialogicSubsyst
 #region HELPERS
 ################################################################################
 
-## This handles the `Layout End Behaviour` setting that can be changed in the Dialogic settings.
-func _on_timeline_ended() -> void:
-	if self.Styles.has_active_layout_node() and self.Styles.get_layout_node().is_inside_tree():
-		match ProjectSettings.get_setting('dialogic/layout/end_behaviour', 0):
-			0:
-				self.Styles.get_layout_node().get_parent().remove_child(self.Styles.get_layout_node())
-				self.Styles.get_layout_node().queue_free()
-			1:
-				@warning_ignore("unsafe_method_access")
-				self.Styles.get_layout_node().hide()
 
 
 func print_debug_moment() -> void:

addons/dialogic/Modules/Audio/subsystem_audio.gd

@@ -194,7 +194,7 @@ func update_audio(channel_name:= "", path := "", settings_overrides := {}) -> vo
 		current_audio_channels[channel_name] = new_player
 
 
-## Returns true if any audio is playing on the given [param channel_name].
+## Returns `true` if any audio is playing on the given [param channel_name].
 func is_channel_playing(channel_name: String) -> bool:
 	return (current_audio_channels.has(channel_name)
 		and is_instance_valid(current_audio_channels[channel_name])
@@ -226,6 +226,14 @@ func is_channel_playing_file(file_path: String, channel_name: String) -> bool:
 		and current_audio_channels[channel_name].stream.resource_path == file_path)
 
 
+## Returns `true` if any channel is playing.
+func is_any_channel_playing() -> bool:
+	for channel in current_audio_channels:
+		if is_channel_playing(channel):
+			return true
+	return false
+
+
 func _on_audio_finished(player: AudioStreamPlayer, channel_name: String, path: String) -> void:
 	if current_audio_channels.has(channel_name) and current_audio_channels[channel_name] == player:
 		current_audio_channels.erase(channel_name)

addons/dialogic/Modules/Clear/event_clear.gd

@@ -26,9 +26,9 @@ func _execute() -> void:
 		var time_per_event: float = dialogic.Inputs.auto_skip.time_per_event
 		final_time = min(time, time_per_event)
 
-	if clear_textbox and dialogic.has_subsystem("Text"):
+	if clear_textbox and dialogic.has_subsystem("Text") and dialogic.Text.is_textbox_visible():
 		dialogic.Text.update_dialog_text('')
-		dialogic.Text.hide_textbox()
+		dialogic.Text.hide_textbox(final_time == 0)
 		dialogic.current_state = dialogic.States.IDLE
 		if step_by_step: await dialogic.get_tree().create_timer(final_time).timeout
 
@@ -44,9 +44,10 @@ func _execute() -> void:
 		if step_by_step: await dialogic.get_tree().create_timer(final_time).timeout
 
 	if clear_music and dialogic.has_subsystem('Audio'):
-		dialogic.Audio.stop_all_channels(final_time)
 		dialogic.Audio.stop_all_one_shot_sounds()
-		if step_by_step: await dialogic.get_tree().create_timer(final_time).timeout
+		if dialogic.Audio.is_any_channel_playing():
+			dialogic.Audio.stop_all_channels(final_time)
+			if step_by_step: await dialogic.get_tree().create_timer(final_time).timeout
 
 	if clear_style and dialogic.has_subsystem('Styles'):
 		dialogic.Styles.change_style()

addons/dialogic/Modules/Jump/event_return.gd

@@ -11,7 +11,7 @@ extends DialogicEvent
 ################################################################################
 
 func _execute() -> void:
-	if !dialogic.Jump.is_jump_stack_empty():
+	if not dialogic.Jump.is_jump_stack_empty():
 		dialogic.Jump.resume_from_last_jump()
 	else:
 		dialogic.end_timeline()