Add sample extensions that use the text-to-speech (TTS) API.

chrome/common/extensions/docs/examples/extensions/ttsdemo/ttsdemo.js

Index: chrome/common/extensions/docs/examples/extensions/ttsdemo/ttsdemo.js
===================================================================
--- chrome/common/extensions/docs/examples/extensions/ttsdemo/ttsdemo.js	(revision 0)
+++ chrome/common/extensions/docs/examples/extensions/ttsdemo/ttsdemo.js	(revision 0)
@@ -0,0 +1,101 @@
+var text;
+var ttsStatus;
+var ttsStatusBox;
+var lang;
+var enqueue;
+var voices;
+var voiceInfo;
+var voiceArray;
+var utteranceIndex = 0;
+
+function load() {
+  text = document.getElementById('srctext');
+  ttsStatus = document.getElementById('ttsStatus');
+  ttsStatusBox = document.getElementById('ttsStatusBox');
+  lang = document.getElementById('lang');
+  enqueue = document.getElementById('enqueue');
+  voices = document.getElementById('voices');
+  voiceInfo = document.getElementById('voiceInfo');
+
+  chrome.tts.getVoices(function(va) {
+    voiceArray = va;
+    for (var i = 0; i < voiceArray.length; i++) {
+      var opt = document.createElement('option');
+      opt.setAttribute('value', voiceArray[i].voiceName);
+      opt.innerText = voiceArray[i].voiceName;
+      voices.appendChild(opt);
+    }
+  });
+  voices.addEventListener('change', function() {
+    var i = voices.selectedIndex - 1;
+    if (i >= 0) {
+      voiceInfo.innerText = JSON.stringify(voiceArray[i], null, 2);
+    } else {
+      voiceInfo.innerText = '';
+    }
+  }, false);
+}
+
+function speak(str, options, highlightText) {
+  if (!options) {
+    options = {};
+  }
+  if (enqueue.value) {
+    options.enqueue = Boolean(enqueue.value);
+  }
+  var voiceIndex = voices.selectedIndex - 1;
+  if (voiceIndex >= 0) {
+    options.voiceName = voiceArray[voiceIndex].voiceName;
+  }
+  var rateValue = Number(rate.value);
+  if (rateValue >= 0.1 && rateValue <= 10.0) {
+    options.rate = rateValue;
+  }
+  var pitchValue = Number(pitch.value);
+  if (pitchValue >= 0.0 && pitchValue <= 2.0) {
+    options.pitch = pitchValue;
+  }
+  var volumeValue = Number(volume.value);
+  if (volumeValue >= 0.0 && volumeValue <= 1.0) {
+    options.volume = volumeValue;
+  }
+  utteranceIndex++;
+  console.log(utteranceIndex + ': ' + JSON.stringify(options));
+  options.onEvent = function(event) {
+    console.log(utteranceIndex + ': ' + JSON.stringify(event));
+    if (highlightText) {
+      text.setSelectionRange(0, event.charIndex);
+    }
+    if (event.type == 'end' ||
+        event.type == 'interrupted' ||
+        event.type == 'cancelled' ||
+        event.type == 'error') {
+      chrome.tts.isSpeaking(function(isSpeaking) {
+        if (!isSpeaking) {
+          ttsStatus.innerHTML = 'Idle';
+          ttsStatusBox.style.background = '#fff';
+        }
+      });
+    }
+  };
+  chrome.tts.speak(
+      str, options, function() {
+    if (chrome.extension.lastError) {
+      console.log('TTS Error: ' + chrome.extension.lastError.message);
+    }
+  });
+  ttsStatus.innerHTML = 'Busy';
+  ttsStatusBox.style.background = '#ffc';
+}
+
+function stop() {
+  chrome.tts.stop();
+}
+
+function speakUserText() {
+  var options = {};
+  if (lang.value) {
+    options.lang = lang.value;
+  }
+  speak(text.value, options, true);
+}
Property changes on: chrome/common/extensions/docs/examples/extensions/ttsdemo/ttsdemo.js
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Added: svn:eol-style
   + LF