From 73cb82319907b568febc5b74c5c91346e0506329 Mon Sep 17 00:00:00 2001
From: Paul Kaplan <pkaplan@media.mit.edu>
Date: Mon, 15 May 2017 08:30:02 -0400
Subject: [PATCH] Add delete costume and sound functions to the vm public api

---
 src/virtual-machine.js | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/virtual-machine.js b/src/virtual-machine.js
index cf4d0e636..a0da9b22f 100644
--- a/src/virtual-machine.js
+++ b/src/virtual-machine.js
@@ -286,6 +286,20 @@ class VirtualMachine extends EventEmitter {
         });
     }
 
+    /**
+     * Delete a costume from the current editing target.
+     * @param {int} costumeIndex - the index of the costume to be removed.
+     */
+    deleteCostume (costumeIndex) {
+        this.editingTarget.sprite.costumes = this.editingTarget.sprite.costumes
+            .slice(0, costumeIndex)
+            .concat(this.editingTarget.sprite.costumes.slice(costumeIndex + 1));
+        if (costumeIndex === this.editingTarget.currentCostume) {
+            this.editingTarget.setCostume(costumeIndex - 1);
+        }
+        this.emitTargetsUpdate();
+    }
+
     /**
      * Add a sound to the current editing target.
      * @param {!object} soundObject Object representing the costume.
@@ -298,6 +312,17 @@ class VirtualMachine extends EventEmitter {
         });
     }
 
+    /**
+     * Delete a sound from the current editing target.
+     * @param {int} soundIndex - the index of the sound to be removed.
+     */
+    deleteSound (soundIndex) {
+        this.editingTarget.sprite.sounds = this.editingTarget.sprite.sounds
+            .slice(0, soundIndex)
+            .concat(this.editingTarget.sprite.sounds.slice(soundIndex + 1));
+        this.emitTargetsUpdate();
+    }
+
     /**
      * Add a backdrop to the stage.
      * @param {string} md5ext - the MD5 and extension of the backdrop to be loaded.