[Chromoting] Let the webapp detect new clipboard text items when it gets focus.

remoting/webapp/remoting.js

Index: remoting/webapp/remoting.js
diff --git a/remoting/webapp/remoting.js b/remoting/webapp/remoting.js
index a8ca35e6cbf032898bded2e497f732a04126f468..9eba4ac677c027c3229c59bc9a70aaadd61347fd 100644
--- a/remoting/webapp/remoting.js
+++ b/remoting/webapp/remoting.js
@@ -44,6 +44,7 @@ remoting.init = function() {
       document.getElementById('host-list-error'));
   remoting.toolbar = new remoting.Toolbar(
       document.getElementById('session-toolbar'));
+  remoting.clipboard = new remoting.Clipboard();
 
   refreshEmail_();
   var email = remoting.oauth2.getCachedEmail();
@@ -51,7 +52,9 @@ remoting.init = function() {
     document.getElementById('current-email').innerText = email;
   }
 
+  window.addEventListener('focus', pluginGotFocus_, false);
   window.addEventListener('blur', pluginLostFocus_, false);
+  window.addEventListener('paste', pluginGotPaste_, false);
 
   // Parse URL parameters.
   var urlParams = getUrlParameters_();
@@ -124,6 +127,28 @@ remoting.clearOAuth2 = function() {
 };
 
 /**
+ * Callback function called when the browser window gets focus.
+ */
+function pluginGotFocus_() {
+  var documentCast = /** @type {remoting.Document} */ document;

[Jamie, 2012/03/14 00:43:47]

This can be simpler if you just annotate execCommand as existing in
document.prototype (or just document, for that matter).

+  documentCast.execCommand("paste");
+}
+
+/**
+ * Callback function called when the browser window gets a paste operation.
+ *
+ * @param {Event} eventUncast
+ * @return {boolean}
+ */
+function pluginGotPaste_(eventUncast) {
+  var event = /** @type {remoting.Event} */ eventUncast;
+  if (event && event.clipboardData) {
+    remoting.clipboard.toHost(event.clipboardData);
+  }
+  return false;
+}
+
+/**
  * Callback function called when the browser window loses focus. In this case,
  * release all keys to prevent them becoming 'stuck down' on the host.
  */