protected values comparison

app/scripts/mixins/protected-value-ex.js

@@ -78,4 +78,26 @@ kdbxweb.ProtectedValue.prototype.includesLower = function(findLower) {
     return matches;
 };
 
+kdbxweb.ProtectedValue.prototype.equals = function(other) {
+    if (!other) {
+        return false;
+    }
+    if (!other.isProtected) {
+        return this.textLength === other.length && this.includes(other);
+    }
+    if (other === this) {
+        return true;
+    }
+    var len = this.byteLength;
+    if (len !== other.byteLength) {
+        return false;
+    }
+    for (var i = 0; i < len; i++) {
+        if ((this._value[i] ^ this._salt[i]) !== (other._value[i] ^ other._salt[i])) {
+            return false;
+        }
+    }
+    return true;
+};
+
 module.exports = kdbxweb.ProtectedValue;

app/scripts/views/fields/field-view.js

@@ -86,9 +86,14 @@ var FieldView = Backbone.View.extend({
             return;
         }
         this.editing = false;
-        var oldValText = this.value && this.value.isProtected ? this.value.getText() : this.value;
-        var newValText = newVal && newVal.isProtected ? newVal.getText() : newVal;
-        var textEqual = _.isEqual(newValText, oldValText);
+        var textEqual;
+        if (this.value && this.value.isProtected) {
+            textEqual = this.value.equals(newVal);
+        } else if (newVal && newVal.isProtected) {
+            textEqual = newVal.equals(this.value);
+        } else {
+            textEqual = _.isEqual(this.value, newVal);
+        }
         var protectedEqual = (newVal && newVal.isProtected) === (this.value && this.value.isProtected);
         var nameChanged = extra && extra.newField;
         var arg;