From ec001299884ccdbdec54d561d38b0f9b7f49cbfd Mon Sep 17 00:00:00 2001
From: David Rowe <david@ctrlaltstudio.com>
Date: Wed, 28 Sep 2016 12:51:00 +1300
Subject: [PATCH] Don't flood event bridge with raise/lower keyboard messages
 from HTML

---
 .../resources/html/raiseAndLowerKeyboard.js     | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/interface/resources/html/raiseAndLowerKeyboard.js b/interface/resources/html/raiseAndLowerKeyboard.js
index 723767790a..84a166ace3 100644
--- a/interface/resources/html/raiseAndLowerKeyboard.js
+++ b/interface/resources/html/raiseAndLowerKeyboard.js
@@ -11,6 +11,7 @@
     var POLL_FREQUENCY = 500; // ms
     var MAX_WARNINGS = 3;
     var numWarnings = 0;
+    var isKeyboardRaised = false;
 
     function shouldRaiseKeyboard() {
         if (document.activeElement.nodeName == "INPUT" || document.activeElement.nodeName == "TEXTAREA") {
@@ -28,13 +29,15 @@
     };
 
     setInterval(function () {
-        var event = shouldRaiseKeyboard() ? "_RAISE_KEYBOARD" : "_LOWER_KEYBOARD";
-        if (typeof EventBridge != "undefined") {
-            EventBridge.emitWebEvent(event);
-        } else {
-            if (numWarnings < MAX_WARNINGS) {
-                console.log("WARNING: no global EventBridge object found");
-                numWarnings++;
+        if (isKeyboardRaised !== shouldRaiseKeyboard()) {
+            isKeyboardRaised = !isKeyboardRaised;
+            if (typeof EventBridge != "undefined") {
+                EventBridge.emitWebEvent(isKeyboardRaised ? "_RAISE_KEYBOARD" : "_LOWER_KEYBOARD");
+            } else {
+                if (numWarnings < MAX_WARNINGS) {
+                    console.log("WARNING: no global EventBridge object found");
+                    numWarnings++;
+                }
             }
         }
     }, POLL_FREQUENCY);