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assets/webapps/uitest.gaiamobile.org/js/HW/fmradio.js

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+'use strict';
+
+function FMRadioTest() {
+  var messageText = document.getElementById('message');
+  var frequencyMin = document.getElementById('frequency-min');
+  var frequencyMax = document.getElementById('frequency-max');
+
+  var container = document.getElementById('container');
+  var controlPanel = document.getElementById('controlPanel');
+
+  var frequencyInput = document.getElementById('frequency');
+  var switchBtn = document.getElementById('switch');
+  var seekUpBtn = document.getElementById('seekUp');
+  var seekDownBtn = document.getElementById('seekDown');
+  var seekAndCancelBtn = document.getElementById('seekAndCancel');
+
+  if (!navigator.mozFMRadio) {
+    console.log('mozFMRadio not support');
+    container.hidden = true;
+    return;
+  }
+
+  var radio = navigator.mozFMRadio;
+  var prevFreq = radio.frequencyLowerBound;
+  var lock = false;
+  if (radio.enabled) {
+    prevFreq = radio.frequency;
+  }
+
+  switchBtn.textContent = radio.enabled;
+  frequencyMin.textContent = radio.frequencyLowerBound;
+  frequencyMax.textContent = radio.frequencyUpperBound;
+  controlPanel.hidden = !radio.enabled;
+  frequencyInput.value = prevFreq;
+
+  togglePanel();
+  toggleControlPanel();
+
+  radio.addEventListener('antennaavailablechange', togglePanel);
+  radio.addEventListener('frequencychange', frequencyChanged);
+
+  frequencyInput.addEventListener('change', setFrequency);
+  switchBtn.addEventListener('click', onclick_radioSwitch);
+  seekUpBtn.addEventListener('click', seek);
+  seekDownBtn.addEventListener('click', seek);
+  seekAndCancelBtn.addEventListener('click', seekAndCancel);
+  window.addEventListener('unload', uninit);
+
+  function logError() {
+    messageText.textContent = this.error.name;
+  }
+
+  // show/hide panels
+  function togglePanel() {
+    if (radio && radio.antennaAvailable) {
+      container.hidden = false;
+      messageText.textContent = '';
+    }
+    else {
+      container.hidden = true;
+      messageText.textContent = 'Headphone is required for FMRadio';
+    }
+  }
+
+  function toggleControlPanel() {
+    lock = false;
+    controlPanel.hidden = !radio.enabled;
+    if (radio.enabled) {
+      switchBtn.textContent = 'Stop';
+    }
+    else {
+      switchBtn.textContent = 'Start';
+    }
+    switchBtn.disabled = false;
+  }
+
+  function onclick_radioSwitch() {
+    if (lock) {
+      return;
+    }
+
+    // lock button until request is finished
+    lock = true;
+    switchBtn.disabled = true;
+
+    var req;
+    if (!radio.enabled) {
+      messageText.textContent = 'turning on FM, please wait...';
+      req = radio.enable(prevFreq);
+    }
+    else {
+      req = radio.disable();
+    }
+    req.onsuccess = req.onerror = function() {
+      toggleControlPanel();
+      if (this.error) {
+        messageText.textContent = this.error.name;
+      }
+      else {
+        messageText.textContent = '';
+      }
+    };
+  }
+
+  function frequencyChanged() {
+    console.log('freq changed');
+    frequencyInput.value = radio.frequency;
+    prevFreq = radio.frequency;
+  }
+
+  function setFrequency() {
+    var req = radio.setFrequency(frequencyInput.value);
+    req.onerror = logError;
+  }
+
+  function seek(evt) {
+    var req;
+    if (evt.target.id == 'seekUp') {
+      req = radio.seekUp();
+    }
+    else {
+      req = radio.seekDown();
+    }
+    req.onerror = logError;
+  }
+
+  function seekAndCancel(evt) {
+    var req = radio.seekUp();
+    console.log('seekUP()');
+    req.onsuccess = function() {
+      console.log('seekUP().onsuccess');
+    };
+    req.onerror = function() {
+      console.log('seekUP().onerror:' + this.error.name);
+    };
+
+    var cancel = radio.cancelSeek();
+    console.log('cancel()');
+    cancel.onsuccess = function() {
+      console.log('canelSeek().onsuccess');
+    };
+    cancel.onerror = function() {
+      console.log('cancelSeek().onerror:' + this.error.name);
+    };
+  }
+
+  function uninit() {
+    if (radio.enabled) {
+      radio.disable();
+    }
+  }
+}
+
+window.addEventListener('load', FMRadioTest);