Issue #3422505: Use once() and context.

Issue #3422505: Use once() and context. Also some minor refactoring in the js.

Closes #3422505

node-edit-protection.js

@@ -12,14 +12,16 @@
   Drupal.behaviors.nodeEditProtection = {
     attach : function(context) {
       // If they leave an input field, assume they changed it.
-      $(".node-form :input").each(function() {
+      // The ':input' selector only works in jQuery, therefore the $(...) is
+      // needed.
+      $(once('node-edit-protection-input', $('.node-form :input'), context)).each(function() {
         $(this).blur(function() {
           edit = true;
         });
       });
 
       // Let all form submit buttons through.
-      $(".node-form input[type='submit'], .node-form button[type='submit']").each(function() {
+      $(once('node-edit-protection-submit', '.node-form :is(input,button)[type="submit"]', context)).each(function() {
         $(this).addClass('node-edit-protection-processed');
         $(this).click(function() {
           click = true;