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gaia/dev_apps/test-keyboard-app/js/main.js

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+var inputContext = null;
+var keyboardElement;
+
+function init() {
+  keyboardElement = document.getElementById('keyboard');
+
+  window.navigator.mozInputMethod.oninputcontextchange = function() {
+    inputContext = navigator.mozInputMethod.inputcontext;
+    resizeWindow();
+  };
+
+  window.addEventListener('resize', resizeWindow);
+
+  keyboardElement.addEventListener('mousedown', function onMouseDown(evt) {
+  // Prevent loosing focus to the currently focused app
+  // Otherwise, right after mousedown event, the app will receive a focus event.
+    evt.preventDefault();
+  });
+
+  var sendKeyElement = document.getElementById('sendKey');
+  sendKeyElement.addEventListener('click', function sendKeyHandler() {
+    var testString = '\\o/';
+    for (var i = 0; i < testString.length; i++) {
+      sendKey(testString.charCodeAt(i));
+    }
+  });
+
+  var switchElement = document.getElementById('switchLayout');
+  switchElement.addEventListener('click', function switchHandler() {
+    var mgmt = navigator.mozInputMethod.mgmt;
+    mgmt.next();
+  });
+
+  // long press to trigger IME menu
+  var menuTimeout = 0;
+  switchElement.addEventListener('touchstart', function longHandler() {
+    menuTimeout = window.setTimeout(function menuTimeout() {
+      var mgmt = navigator.mozInputMethod.mgmt;
+      mgmt.showAll();
+    }, 700);
+  });
+
+  switchElement.addEventListener('touchend', function longHandler() {
+    clearTimeout(menuTimeout);
+  });
+}
+
+function resizeWindow() {
+  window.resizeTo(window.innerWidth, keyboardElement.clientHeight);
+}
+
+function sendKey(keyCode) {
+  switch (keyCode) {
+  case KeyEvent.DOM_VK_BACK_SPACE:
+  case KeyEvent.DOM_VK_RETURN:
+    if (inputContext) {
+      inputContext.sendKey(keyCode, 0, 0);
+    }
+    break;
+
+  default:
+    if (inputContext) {
+      inputContext.sendKey(0, keyCode, 0);
+    }
+    break;
+  }
+}
+
+window.addEventListener('load', init);