perf(core): Debounce upate

Stops editor update from firing in rapid succession. Was an issue when updating after every character typed.

Closes #226

Author: Brian

CONTRIBUTING.md

@@ -33,7 +33,7 @@ We are always looking for the quality contributions and will be happy to accept
   * You have accompanying tests and all the tests are passing.  See testing below.
   * Your PR doesn't break the build; check the Travis-CI build status after opening a PR and push corrective commits if anything goes wrong
   * You are using 2 space indentation
-  * Your commits conform to the conventions established [here](https://github.com/ajoslin/conventional-changelog/blob/master/conventions/angular.md)
+  * Your commits conform to the conventions established [here](https://github.com/stevemao/conventional-changelog-angular/blob/master/convention.md)
 
 
 ## Testing

src/tinymce.js

@@ -56,6 +56,20 @@ angular.module('ui.tinymce', [])
 
         angular.extend(expression, scope.$eval(attrs.uiTinymce));
 
+        //Debounce update and save action
+        var debouncedUpdate = (function(debouncedUpdateDelay) {
+          var debouncedUpdateTimer;
+          return function(ed) {
+	        $timeout.cancel(debouncedUpdateTimer);
+	         debouncedUpdateTimer = $timeout(function() {
+              return (function(ed) {
+                ed.save();
+                updateView(ed);
+              })(ed);
+            }, debouncedUpdateDelay);
+          };
+        })(400);
+
         var setupOptions = {
           // Update model when calling setContent
           // (such as from the source editor popup)
@@ -75,8 +89,7 @@ angular.module('ui.tinymce', [])
             // - the node has changed [NodeChange]
             // - an object has been resized (table, image) [ObjectResized]
             ed.on('ExecCommand change NodeChange ObjectResized', function() {
-              ed.save();
-              updateView(ed);
+              debouncedUpdate(ed);
             });
 
             ed.on('blur', function() {