ImportsourceHookTable: use root columns, improve

...styling

fixes #243
fixes #1153

library/Director/Web/Table/ImportsourceHookTable.php

@@ -4,8 +4,10 @@ namespace Icinga\Module\Director\Web\Table;
 
 use Icinga\Data\DataArray\ArrayDatasource;
 use Icinga\Module\Director\Hook\ImportSourceHook;
+use Icinga\Module\Director\Import\SyncUtils;
 use Icinga\Module\Director\Objects\ImportSource;
 use Icinga\Module\Director\PlainObjectRenderer;
+use ipl\Html\Html;
 use ipl\Web\Table\SimpleQueryBasedTable;
 
 class ImportsourceHookTable extends SimpleQueryBasedTable
@@ -22,10 +24,11 @@ class ImportsourceHookTable extends SimpleQueryBasedTable
     public function getColumns()
     {
         if ($this->columnCache === null) {
-            $this->columnCache = array_merge(
+            $this->columnCache = SyncUtils::getRootVariables(
+                array_merge(
                 $this->sourceHook()->listColumns(),
                 $this->source->listModifierTargetProperties()
-            );
+            ));
 
             sort($this->columnCache);
 
@@ -58,7 +61,12 @@ class ImportsourceHookTable extends SimpleQueryBasedTable
         foreach ($this->getColumnsToBeRendered() as $column) {
             $td = $this::td();
             if (property_exists($row, $column)) {
-                $td->setContent(PlainObjectRenderer::render($row->$column));
+                if (is_string($row->$column)) {
+                    $td->setContent($row->$column);
+                } else {
+                    $html = Html::tag('pre', null, PlainObjectRenderer::render($row->$column));
+                    $td->setContent($html);
+                }
             }
             $tr->add($td);
         }

public/css/module.less

@@ -64,9 +64,11 @@ table.common-table {
   pre {
     margin: 0;
     padding: 0.2em;
-    overflow: hidden;
-    max-height: 12em;
+    max-height: 18em;
     background: @gray-lightest;
+    overflow: auto;
+    word-break: keep-all;
+    white-space: pre;
     display: inline-block;
   }
 }