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gaia/dev_apps/uitest/js/API/openaudio.js

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+var open = document.getElementById('open');
+var opensavefile = document.getElementById('opensavefile');
+var opensaveblob = document.getElementById('opensaveblob');
+open.hidden = true;
+opensavefile.hidden = true;
+opensaveblob.hidden = true;
+
+open.onclick = function() {
+  var a = new MozActivity({
+    name: 'open',
+    data: {
+      type: 'audio/ogg',
+      blob: localblob,
+      title: 'jonobacon-freesoftwaresong2.ogg'
+    }
+  });
+  a.onsuccess = function() {
+    console.log('activity returns', JSON.stringify(a.result));
+  };
+};
+
+opensavefile.onclick = function() {
+  var a = new MozActivity({
+    name: 'open',
+    data: {
+      type: 'audio/ogg',
+      blob: localblob,
+      allowSave: true,
+      filename: 'downloads/uitest/jonobacon-freesoftwaresong2.ogg'
+    }
+  });
+  a.onsuccess = function() {
+    console.log('activity returns', JSON.stringify(a.result));
+  };
+};
+
+opensaveblob.onclick = function() {
+  var a = new MozActivity({
+    name: 'open',
+    data: {
+      type: 'audio/ogg',
+      blob: remoteblob,
+      allowSave: true,
+      filename: 'downloads/uitest/Back_In_Black-sample.ogg'
+    }
+  });
+  a.onsuccess = function() {
+    console.log('activity returns', JSON.stringify(a.result));
+  };
+};
+
+// The audio we want to open
+var localblob;
+var remoteblob;
+var localURL = '../../data/audio/jonobacon-freesoftwaresong2.ogg';
+var remoteURL = 'http://upload.wikimedia.org/wikipedia/en/4/45/' +
+                'ACDC_-_Back_In_Black-sample.ogg';
+
+var localxhr = new XMLHttpRequest();
+localxhr.open('GET', localURL);
+localxhr.responseType = 'blob';
+localxhr.send();
+localxhr.onload = function() {
+  localblob = new Blob([localxhr.response], { type: 'audio/ogg' });
+  open.hidden = false;
+  opensavefile.hidden = false;
+};
+localxhr.onerror = function() {
+  console.log('Error loading test audio', localxhr.error.name);
+};
+
+var remotexhr = new XMLHttpRequest();
+remotexhr.open('GET', remoteURL);
+remotexhr.responseType = 'blob';
+remotexhr.send();
+remotexhr.onload = function() {
+  remoteblob = new Blob([remotexhr.response], { type: 'audio/ogg' });
+  opensaveblob.hidden = false;
+};
+remotexhr.onerror = function() {
+  console.log('Error loading test audio from network', remotexhr.error.name);
+};