added ability to export sounds

HISTORY.md

@@ -12,6 +12,7 @@
     * new "string" library, thanks, Brian
     * added "neg" selector to monadic function reporter in "Operators" category
     * enhances support for embedding Snap in other website, thanks, Bernat!
+    * export sounds
 * Notable Changes:
     * added third hsv dimension to pen colors, changed SET and CHANGE pen blocks
     * added transparency (alpha) to pen colors
@@ -33,6 +34,7 @@
 ### 2019-01-25
 * Threads: tweaked CSV-parser to handle \r-only record delimiters
 * Cloud, GUI: Decouple cloud access from GUI, thanks, Michael and Bernat!
+* GUI: added ability to export sounds
 
 ### 2019-01-24
 * Turkish translation update, thanks, Turgut!

src/gui.js

@@ -4704,6 +4704,11 @@ IDE_Morph.prototype.saveCanvasAs = function (canvas, fileName) {
     this.saveFileAs(canvas.toDataURL(), 'image/png', fileName);
 };
 
+IDE_Morph.prototype.saveAudioAs = function (audio, fileName) {
+    // Export a Sound object as a WAV file
+    this.saveFileAs(audio.src, 'audio/wav', fileName);
+};
+
 IDE_Morph.prototype.saveXMLAs = function(xml, fileName) {
     // wrapper to saving XML files with a proper type tag.
     this.saveFileAs(xml, 'text/xml;chartset=utf-8', fileName);
@@ -8911,6 +8916,8 @@ SoundIconMorph.prototype.userMenu = function () {
     if (!(this.object instanceof Sound)) { return null; }
     menu.addItem('rename', 'renameSound');
     menu.addItem('delete', 'removeSound');
+    menu.addLine();
+    menu.addItem('export', 'exportSound');
     return menu;
 };
 
@@ -8944,6 +8951,11 @@ SoundIconMorph.prototype.removeSound = function () {
     jukebox.removeSound(idx);
 };
 
+SoundIconMorph.prototype.exportSound = function () {
+    var ide = this.parentThatIsA(IDE_Morph);
+    ide.saveAudioAs(this.object.audio, this.object.name);
+};
+
 SoundIconMorph.prototype.createBackgrounds
     = SpriteIconMorph.prototype.createBackgrounds;