Apply canCreate permissions to Select2 for tags

* Resolves #80

code/StringTagField.php

@@ -164,6 +164,8 @@ class StringTagField extends DropdownField
             ));
         }
 
+        $this->setAttribute('data-can-create', (int) $this->getCanCreate());
+
         return $this
             ->customise($properties)
             ->renderWith(array("templates/TagField"));

code/TagField.php

@@ -178,6 +178,8 @@ class TagField extends DropdownField
             ));
         }
 
+        $this->setAttribute('data-can-create', (int) $this->getCanCreate());
+
         return $this
             ->customise($properties)
             ->renderWith(array("templates/TagField"));
@@ -406,7 +408,7 @@ class TagField extends DropdownField
     {
         return true;
     }
-    
+
     /**
      * Converts the field to a readonly variant.
      *
@@ -429,7 +431,7 @@ class TagField extends DropdownField
 class TagField_Readonly extends TagField
 {
     protected $readonly = true;
-    
+
     /**
      * Render the readonly field as HTML.
      *
@@ -439,13 +441,13 @@ class TagField_Readonly extends TagField
     public function Field($properties = array())
     {
         $options = array();
-        
+
         foreach ($this->getOptions()->filter('Selected', true) as $option) {
             $options[] = $option->Title;
         }
-        
+
         $field = ReadonlyField::create($this->name.'_Readonly', $this->title);
-        
+
         $field->setForm($this->form);
         $field->setValue(implode(', ', $options));
         return $field->Field();

js/TagField.js

@@ -46,6 +46,10 @@
 					'tokenSeparators': [',']
 				};
 
+				if ($select.attr('data-can-create') == 0) {
+					options.tags = false;
+				}
+
 				if ($select.attr('data-ss-tag-field-suggest-url')) {
 					options.ajax = {
 						'url': $select.attr('data-ss-tag-field-suggest-url'),