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

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

Index: chrome/common/extensions/docs/examples/extensions/talking_alarm_clock/common.js
===================================================================
--- chrome/common/extensions/docs/examples/extensions/talking_alarm_clock/common.js	(revision 0)
+++ chrome/common/extensions/docs/examples/extensions/talking_alarm_clock/common.js	(revision 0)
@@ -0,0 +1,173 @@
+var DEFAULT_A1_TT = '09:30';
+var DEFAULT_A1_AMPM = 0;
+var DEFAULT_A2_TT = '03:30';
+var DEFAULT_A2_AMPM = 1;
+var DEFAULT_RATE = 1.0;
+var DEFAULT_VOLUME = 1.0;
+var DEFAULT_PHRASE = 'It\'s $TIME, so get up!';
+var DEFAULT_SOUND = 'ringing';
+
+var audio = null;
+
+var isPlaying = false;
+var isSpeaking = false;
+var isAnimating = false;
+
+// Overridden in popup.js but not in background.js.
+window.displayAlarmAnimation = function() {
+};
+
+// Overridden in popup.js but not in background.js.
+window.stopAlarmAnimation = function() {
+};
+
+// Overridden in background.js but not in popup.js.
+window.flashIcon = function() {
+};
+
+// Overridden in background.js but not in popup.js.
+window.stopFlashingIcon = function() {
+};
+
+function $(id) {
+  return document.getElementById(id);
+}
+
+function parseTime(timeString, ampm) {
+  var time = timeString.match(/^(\d\d):(\d\d)$/);
+  if (!time) {
+    throw 'Cannot parse: ' + timeString;
+  }
+
+  var hours = parseInt(time[1], 10);
+  if (hours == 12 && ampm == 0) {
+    hours = 0;
+  } else {
+    hours += (hours < 12 && ampm == 1)? 12 : 0;
+  }
+  var minutes = parseInt(time[2], 10) || 0;
+
+  return [hours, minutes];
+}
+
+function stopAll() {
+  if (audio) {
+    audio.pause();
+    isPlaying = false;
+  }
+  try {
+    chrome.tts.stop();
+    isSpeaking = false;
+  } catch (e) {
+  }
+  window.stopAlarmAnimation();
+  window.stopFlashingIcon();
+}
+
+function playSound(duckAudio) {
+  if (audio) {
+    audio.pause();
+    document.body.removeChild(audio);
+    audio = null;
+  }
+
+  var currentSound = localStorage['sound'] || DEFAULT_SOUND;
+  if (currentSound == 'none') {
+    return;
+  }
+
+  audio = document.createElement('audio');
+  audio.addEventListener('ended', function(evt) {
+    isPlaying = false;
+  });
+  document.body.appendChild(audio);
+  audio.autoplay = true;
+
+  var src = 'audio/' + currentSound + '.ogg';
+  var volume = parseFloat(localStorage['volume']) || DEFAULT_VOLUME;
+  audio.volume = volume;
+  audio.src = src;
+  isPlaying = true;
+
+  if (duckAudio) {
+    for (var i = 0; i < 10; i++) {
+      (function(i) {
+         window.setTimeout(function() {
+           var duckedVolume = volume * (1.0 - 0.07 * (i + 1));
+           audio.volume = duckedVolume;
+         }, 1800 + 50 * i);
+      })(i);
+    }
+  }
+}
+
+function getTimeString(hh, mm) {
+  var ampm = hh >= 12 ? 'P M' : 'A M';
+  hh = (hh % 12);
+  if (hh == 0)
+    hh = 12;
+  if (mm == 0)
+    mm = 'o\'clock';
+  else if (mm < 10)
+    mm = 'O ' + mm;
+
+  return hh + ' ' + mm + ' ' + ampm;
+}
+
+function speak(text) {
+  var rate = parseFloat(localStorage['rate']) || DEFAULT_RATE;
+  var pitch = 1.0;
+  var volume = parseFloat(localStorage['volume']) || DEFAULT_VOLUME;
+  var voice = localStorage['voice'];
+  chrome.tts.speak(
+      text,
+      {voiceName: voice,
+       rate: rate,
+       pitch: pitch,
+       volume: volume,
+       onEvent: function(evt) {
+         if (evt.type == 'end') {
+           isSpeaking = false;
+         }
+       }
+      });
+}
+
+function speakPhraseWithTimeString(timeString) {
+  var phraseTemplate = localStorage['phrase'] || DEFAULT_PHRASE;
+  var utterance = phraseTemplate.replace(/\$TIME/g, timeString);
+  speak(utterance);
+}
+
+function speakPhraseWithCurrentTime() {
+  var d = new Date();
+  speakPhraseWithTimeString(getTimeString(d.getHours(), d.getMinutes()));
+}
+
+function ringAlarm(alarmHours, alarmMinutes) {
+  window.displayAlarmAnimation();
+  window.flashIcon();
+
+  var phraseTemplate = localStorage['phrase'] || DEFAULT_PHRASE;
+  var currentSound = localStorage['sound'] || DEFAULT_SOUND;
+
+  if (phraseTemplate == '') {
+    playSound(false);
+  } else if (currentSound == 'none') {
+    speakPhraseWithTimeString(getTimeString(alarmHours, alarmMinutes));
+  } else {
+    chrome.tts.stop();
+    playSound(true);
+    isSpeaking = true;
+    window.setTimeout(function() {
+      if (isSpeaking) {
+        speakPhraseWithTimeString(getTimeString(alarmHours, alarmMinutes));
+      }
+    }, 2000);
+  }
+}
+
+function ringAlarmWithCurrentTime() {
+  var d = new Date();
+  ringAlarm(d.getHours(), d.getMinutes());
+}
Property changes on: chrome/common/extensions/docs/examples/extensions/talking_alarm_clock/common.js
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Added: svn:eol-style
   + LF