From 42d57567e05c896cfd7f0fd8518f90f160af571e Mon Sep 17 00:00:00 2001
From: Anna Schumaker <schumaker.anna@gmail.com>
Date: Sun, 19 Jan 2014 11:03:14 -0500
Subject: [PATCH] callbacks: Add callbacks for playqueue size modifications

Signed-off-by: Anna Schumaker <schumaker.anna@gmail.com>
---
 include/callback.h | 6 ++++++
 lib/callback.cpp   | 4 ++++
 lib/playqueue.cpp  | 5 +++++
 3 files changed, 15 insertions(+)

diff --git a/include/callback.h b/include/callback.h
index 502f2f7d..2f5470be 100644
--- a/include/callback.h
+++ b/include/callback.h
@@ -5,13 +5,19 @@
 #define OCARINA_CALLBACK_H
 
 #include <library.h>
+#include <playqueue.h>
 
 
 struct Callbacks {
+	/* Library callbacks */
 	void (*on_library_add)(unsigned int, library :: Library *);
 	void (*on_library_update)(unsigned int, library :: Library *);
 	void (*on_library_track_add)(unsigned int);
 	void (*on_library_track_del)(unsigned int);
+
+	/* Playqueue callbacks */
+	void (*on_queue_track_add)(Playqueue *);
+	void (*on_queue_track_del)(Playqueue *);
 };
 
 
diff --git a/lib/callback.cpp b/lib/callback.cpp
index 1d0eb13a..d242f5f1 100644
--- a/lib/callback.cpp
+++ b/lib/callback.cpp
@@ -6,6 +6,7 @@
 
 static void no_op(unsigned int) {}
 static void no_op(unsigned int id, library :: Library *path) {}
+static void no_op(Playqueue *) {}
 
 
 static struct Callbacks callbacks = {
@@ -13,6 +14,9 @@ static struct Callbacks callbacks = {
 	.on_library_update	= no_op,
 	.on_library_track_add	= no_op,
 	.on_library_track_del	= no_op,
+
+	.on_queue_track_add	= no_op,
+	.on_queue_track_del	= no_op,
 };
 
 
diff --git a/lib/playqueue.cpp b/lib/playqueue.cpp
index 5cc54fbf..0b25c19b 100644
--- a/lib/playqueue.cpp
+++ b/lib/playqueue.cpp
@@ -1,6 +1,7 @@
 /*
  * Copyright 2013 (c) Anna Schumaker.
  */
+#include <callback.h>
 #include <library.h>
 #include <playqueue.h>
 #include <stdlib.h>
@@ -62,6 +63,7 @@ unsigned int Playqueue :: add(unsigned int track_id)
 
 	library :: lookup(track_id, &song);
 	length += song.track->length;
+	get_callbacks()->on_queue_track_add(this);
 	return tracks.size() - 1;
 }
 
@@ -72,6 +74,7 @@ unsigned int Playqueue :: add_front(unsigned int track_id)
 
 	library :: lookup(track_id, &song);
 	length += song.track->length;
+	get_callbacks()->on_queue_track_add(this);
 	return 0;
 }
 
@@ -83,6 +86,7 @@ void Playqueue :: del(unsigned int plist_id)
 	tracks.erase(tracks.begin() + plist_id);
 	library :: lookup(track_id, &song);
 	length -= song.track->length;
+	get_callbacks()->on_queue_track_del(this);
 }
 
 void Playqueue :: del_track(unsigned int track_id)
@@ -94,6 +98,7 @@ void Playqueue :: del_track(unsigned int track_id)
 		else
 			i++;
 	}
+	get_callbacks()->on_queue_track_del(this);
 }
 
 unsigned int Playqueue :: size()