Initial import of sample extensions

text_to_speech_extension.js

@@ -0,0 +1,51 @@
+/* Extension using the JavaScript Speech API for text to speech */
+/* Sayamindu Dasgupta <sayamindu@media.mit.edu>, April 2014 */
+
+new (function() {
+    var ext = this;
+
+    /*function _get_voices() {
+        var ret = [];
+        var voices = speechSynthesis.getVoices();
+        
+        for(var i = 0; i < voices.length; i++ ) {
+            ret.push(voices[i].name);
+            console.log(voices.toString());
+        }
+
+        return ret;
+    }
+
+    ext.set_voice = function() {
+    };*/
+
+    ext.speak_text = function (text, callback) {
+        var u = new SpeechSynthesisUtterance(text.toString());
+        u.onend = function(event) {
+            if (typeof callback=="function") callback();
+        };
+        
+        speechSynthesis.speak(u);
+    };
+
+    ext._shutdown = function() {};
+
+    ext._getStatus = function() {
+        if (window.SpeechSynthesisUtterance === undefined) {
+            return {status: 1, msg: 'Your browser does not support text to speech. Try using Google Chrome or Safari.'};
+        }
+        return {status: 2, msg: 'Ready'};
+    };
+
+    var descriptor = {
+        blocks: [
+            //['', 'set voice to %m.voices', 'set_voice', ''],
+            ['w', 'speak %s', 'speak_text', 'Hello!'],
+        ],
+        /*menus: {
+            voices: _get_voices(),
+        },*/
+    };
+
+    ScratchExtensions.register('Text to Speech', descriptor, ext);
+})();