Added Dialog Audio component to play writing sound effects

Assets/Fungus/Narrative/Scripts/DialogAudio.cs

@@ -1,34 +1,77 @@
 using UnityEngine;
 using System.Collections;
+using System.Collections.Generic;
 
 namespace Fungus
 {
-
 	/*
 	 * Manages audio effects for Dialogs
 	 */
-	public class DialogAudio : MonoBehaviour
+	public class DialogAudio : MonoBehaviour, IWriterListener
 	{
+		// If none is specifed then we use any AudioSource on the gameobject, and if that doesn't exist we create one.
+		[Tooltip("AudioSource to use for playing sound effects.")]
 		public AudioSource audioSource;
-		public AudioClip audioClip;
-		public float volume;
-		public bool loop;
 
-		public virtual void Play()
+		public enum AudioMode
+		{
+			Beeps,			// Use short beep sound effects
+			SoundEffect,	// Use long looping sound effect
+		}
+
+		[Tooltip("Type of sound effect to play when writing text")]
+		public AudioMode audioMode = AudioMode.Beeps;
+
+		[Tooltip("List of beeps to randomly select when playing beep sound effects")]
+		public List<AudioClip> beeps = new List<AudioClip>();
+
+		[Tooltip("Long playing sound effect to play when writing text")]
+		public AudioClip soundEffect;
+
+		[Tooltip("Loop the sound effect")]
+		public bool loop = true;
+
+		[Tooltip("Volume level of writing sound effects")]
+		[Range(0,1)]
+		public float volume = 1f;
+
+		protected float targetVolume = 0f;
+
+		protected virtual void Start()
+		{
+			if (audioSource == null)
+			{
+				audioSource = GetComponent<AudioSource>();
+				if (audioSource == null)
+				{
+					audioSource = gameObject.AddComponent<AudioSource>();
+				}
+			}
+
+			audioSource.volume = 0f;
+		}
+
+		public virtual void Play(AudioClip audioClip)
 		{
 			if (audioSource == null ||
-			    audioClip == null)
+			    (soundEffect == null && audioClip == null))
 			{
 				return;
 			}
 
+			if (audioClip != null)
+			{
 				audioSource.clip = audioClip;
+			}
+			else
+			{
+				audioSource.clip = soundEffect;
+			}
+
 			audioSource.loop = loop;
 
-			// Fade in the audio at start
-			LeanTween.value(audioSource.gameObject, 0f, volume, 0.1f).setOnUpdate( (value) => {
-				audioSource.volume = value;
-			});
+			audioSource.volume = 0f;
+			targetVolume = 1f;
 
 			audioSource.Play();
 		}
@@ -40,12 +83,8 @@ namespace Fungus
 				return;
 			}
 
-			// Fade out the audio
-			// There's an audible click if you call audioSource.Pause() so instead just
-			// drop the volume to 0.
-			LeanTween.value(audioSource.gameObject, volume, 0f, 0.1f).setOnUpdate( (value) => {
-				audioSource.volume = value;
-			});
+			// There's an audible click if you call audioSource.Pause() so instead just drop the volume to 0.
+			targetVolume = 0f;
 		}
 
 		public virtual void Stop()
@@ -55,14 +94,10 @@ namespace Fungus
 				return;
 			}
 
-			// Fade out the audio
-			LeanTween.value(audioSource.gameObject, audioSource.volume, 0f, 0.1f).setOnUpdate( (value) => {
-				audioSource.volume = value;
-			}).setOnComplete( () => {
 			// There's an audible click if you call audioSource.Stop() so instead we just switch off
 			// looping and let the audio stop automatically at the end of the clip
+			targetVolume = 0f;
 			audioSource.loop = false;
-			});
 		}
 
 		public virtual void Resume()
@@ -72,12 +107,40 @@ namespace Fungus
 				return;
 			}
 
-			audioSource.volume = volume;
-			if (!audioSource.isPlaying)
+			targetVolume = 1f;
+		}
+
+		protected virtual void Update()
 		{
-				audioSource.loop = loop;
-				audioSource.Play();
+			audioSource.volume = Mathf.MoveTowards(audioSource.volume, targetVolume, Time.deltaTime * 5f);
+		}
+
+		//
+		// IWriterListener implementation
+		//
+
+		public virtual void OnStart(AudioClip audioClip)
+		{
+			Play(audioClip);
 		}
+		
+		public virtual void OnPause()
+		{
+			Pause();
+		}
+		
+		public virtual void OnResume()
+		{
+			Resume();
+		}
+		
+		public virtual void OnEnd()
+		{
+			Stop ();
+		}
+		
+		public virtual void OnCharacter()
+		{
 		}
 	}
 

Assets/Fungus/Narrative/Scripts/SayDialog.cs

@@ -113,11 +113,11 @@ namespace Fungus
 			GetCanvasGroup().alpha = 0f;
 		}
 
-		public virtual void Say(string text, bool clearPrevious, bool waitForInput, bool fadeWhenDone, AudioClip voiceOverClip, Action onComplete)
+		public virtual void Say(string text, bool clearPrevious, bool waitForInput, bool fadeWhenDone, AudioClip audioClip, Action onComplete)
 		{
 			this.fadeWhenDone = fadeWhenDone;
 
-			GetWriter().Write(text, clearPrevious, waitForInput, onComplete);
+			GetWriter().Write(text, clearPrevious, waitForInput, audioClip, onComplete);
 		}
 
 		protected virtual void LateUpdate()

Assets/Fungus/UI/Scripts/Commands/Write.cs

@@ -75,12 +75,12 @@ namespace Fungus
 
 			if (!waitUntilFinished)
 			{
-				writer.Write(newText, clearText, false, null);
+				writer.Write(newText, clearText, false, null, null);
 				Continue();
 			}
 			else
 			{
-				writer.Write(newText, clearText, false,
+				writer.Write(newText, clearText, false, null,
 				             () => { Continue (); }
 				);
 			}

Assets/Fungus/UI/Scripts/Writer.cs

@@ -7,6 +7,28 @@ using System;
 namespace Fungus
 {
 
+	/**
+	 * Implement this interface to be notified about Writer events
+	 */
+	public interface IWriterListener
+	{
+		// Called when the Writer starts writing new text
+		// An optional audioClip sound effect can be supplied (e.g. for voiceover)
+		void OnStart(AudioClip audioClip);
+
+		// Called when the Writer has paused writing text (e.g. on a {wi} tag)
+		void OnPause();
+
+		// Called when the Writer has resumed writing text
+		void OnResume();
+
+		// Called when the Writer has finshed writing text
+		void OnEnd();
+
+		// Called every time the Writer writes a character
+		void OnCharacter();
+	}
+	
 	public class Writer : MonoBehaviour, IDialogInputListener
 	{
 		[Tooltip("Gameobject containing a Text, Inout Field or Text Mesh object to write to")]
@@ -43,6 +65,8 @@ namespace Fungus
 		protected string colorText = "";
 		protected bool inputFlag;
 
+		protected List<IWriterListener> writerListeners = new List<IWriterListener>();
+
 		public string text 
 		{
 			get 
@@ -90,6 +114,16 @@ namespace Fungus
 			textUI = go.GetComponent<Text>();
 			inputField = go.GetComponent<InputField>();
 			textMesh = go.GetComponent<TextMesh>();
+
+			// Cache the list of child writer listeners
+			foreach (Component component in GetComponentsInChildren<Component>())
+			{
+				IWriterListener writerListener = component as IWriterListener;
+				if (writerListener != null)
+				{
+					writerListeners.Add(writerListener);
+				}
+			}
 		}
 		
 		public virtual bool HasTextObject()
@@ -204,7 +238,7 @@ namespace Fungus
 			}
 		}
 		
-		public virtual void Write(string content, bool clear, bool waitForInput, Action onComplete)
+		public virtual void Write(string content, bool clear, bool waitForInput, AudioClip audioClip, Action onComplete)
 		{
 			if (clear)
 			{
@@ -216,6 +250,9 @@ namespace Fungus
 				return;
 			}
 
+			// If this clip is null then DialogAudio will play the default sound effect (if any)
+			NotifyStart(audioClip);
+
 			string tokenText = content;
 			if (waitForInput)
 			{
@@ -408,6 +445,8 @@ namespace Fungus
 			inputFlag = false;
 			isWriting = false;
 
+			NotifyEnd();
+
 			if (onComplete != null)
 			{
 				onComplete();
@@ -440,7 +479,7 @@ namespace Fungus
 				if (left.Length > 0 && 
 				    IsPunctuation(left.Substring(left.Length - 1)[0]))
 				{
-					yield return new WaitForSeconds(currentPunctuationPause);
+					yield return StartCoroutine(DoWait(currentPunctuationPause));
 				}
 
 				// Delay between characters
@@ -513,16 +552,36 @@ namespace Fungus
 				duration = 1f;
 			}
 
+			NotifyPause();
+
+			float timeRemaining = duration;
+			while (timeRemaining > 0f && !inputFlag)
+			{
+				timeRemaining -= Time.deltaTime;
+				yield return null;
+			}
+
+			NotifyResume();
+		}
+
+		protected virtual IEnumerator DoWait(float duration)
+		{
+			NotifyPause();
+
 			float timeRemaining = duration;
 			while (timeRemaining > 0f && !inputFlag)
 			{
 				timeRemaining -= Time.deltaTime;
 				yield return null;
 			}
+
+			NotifyResume();
 		}
 
 		protected virtual IEnumerator DoWaitForInput(bool clear)
 		{
+			NotifyPause();
+
 			inputFlag = false;
 			isWaitingForInput = true;
 
@@ -538,6 +597,8 @@ namespace Fungus
 			{
 				textUI.text = "";
 			}
+
+			NotifyResume();
 		}
 		
 		protected virtual bool IsPunctuation(char character)
@@ -577,6 +638,46 @@ namespace Fungus
 			return go.GetComponent<AudioSource>();
 		}
 
+		protected virtual void NotifyStart(AudioClip audioClip)
+		{
+			foreach (IWriterListener writerListener in writerListeners)
+			{
+				writerListener.OnStart(audioClip);
+			}
+		}
+
+		protected virtual void NotifyPause()
+		{
+			foreach (IWriterListener writerListener in writerListeners)
+			{
+				writerListener.OnPause();
+			}
+		}
+
+		protected virtual void NotifyResume()
+		{
+			foreach (IWriterListener writerListener in writerListeners)
+			{
+				writerListener.OnResume();
+			}
+		}
+
+		protected virtual void NotifyEnd()
+		{
+			foreach (IWriterListener writerListener in writerListeners)
+			{
+				writerListener.OnEnd();
+			}
+		}
+
+		protected virtual void NotifyCharacter()
+		{
+			foreach (IWriterListener writerListener in writerListeners)
+			{
+				writerListener.OnCharacter();
+			}
+		}
+
 		//
 		// IDialogInputListener implementation
 		//