Refine "Object Details" handling.

- Allow "form" structure to be returned by the hook call in
  addition to markup.
- Fix permissions.

plugins/FedoraObjectDetailedContent.inc

@@ -55,14 +55,14 @@ class FedoraObjectDetailedContent {
     if (!isset($profile)) {
       // default behaviour
       watchdog('fedora_repository', "Error while reading the default object details display profile: @e", array("@e" => $e->getMessage()), WATCHDOG_WARNING);
-      $dc_html = $objectHelper->getFormattedDC($this->item);
+      $dc_returned = $objectHelper->getFormattedDC($this->item);
     }
     else {
       // invoke the requested display profile
       require_once(drupal_get_path('module', $profile['module']) ."/". $profile['file']);
       $details_function = $profile['function'];
       if (function_exists($details_function)) {
-        $dc_html = $details_function($this->item);
+        $dc_returned = $details_function($this->item);
       }
       else {
         // problem - display profile not found
@@ -70,16 +70,27 @@ class FedoraObjectDetailedContent {
       }
     }
 
+    $dc_array = array();
     $i = 0;
-    if (fedora_repository_access(OBJECTHELPER :: $VIEW_DETAILED_CONTENT_LIST, $this->pid, $user)) {
+    if (is_array($dc_returned)) {
+      $dc_array = $dc_returned;
+      $dc_array['#weight'] = $i++;
+    }
+    else {
+      $dc_array = array(
+        '#type' => 'markup',
+        '#value' => $dc_returned, //XXX:  This could easily be done in Drupal, instead of using an XSL
+        '#weight' => $i++
+      );
+    }
+
     $tabset['fedora_object_details']['tabset']['view'] = array(
       '#type' => 'tabpage',
       '#title' => t('View'),
-        'dc' => array(
-          '#type' => 'markup',
-          '#value' => $dc_html, //XXX:  This could easily be done in Drupal, instead of using an XSL
-          '#weight' => $i++
-        ),
+      'dc' => $dc_array,
+    );
+    if (fedora_repository_access(ObjectHelper :: $VIEW_DETAILED_CONTENT_LIST, $this->pid, $user)) {
+      $tabset['fedora_object_details']['tabset']['view'] += array(
         'list' => array(
           '#type' => 'fieldset',
           '#title' => t('Detailed List of Content'),
@@ -100,6 +111,11 @@ class FedoraObjectDetailedContent {
             '#weight' => $i++,
           ),
         ),
+      );
+    }
+
+    if (fedora_repository_access(ObjectHelper :: $PURGE_FEDORA_OBJECTSANDSTREAMS, $this->pid, $user)) {
+      $tabset['fedora_object_details']['tabset']['view'] += array(
         'purge' => array(
           '#type' => 'markup',
           '#value' => $purge_form,