Add offset pagination support to serial column

src/Column/Base/DataContext.php

@@ -4,11 +4,18 @@
 
 namespace Yiisoft\Yii\DataView\Column\Base;
 
+use Yiisoft\Data\Reader\ReadableDataInterface;
 use Yiisoft\Yii\DataView\Column\ColumnInterface;
 
 final class DataContext
 {
+    /**
+     * @param ReadableDataInterface|null $preparedDataReader The prepared data reader with applied filters, paginating
+     * and sorting. `null` means that there is no data.
+     * @param int $index 0-based index of the data item among the items currently rendered.
+     */
     public function __construct(
+        public readonly ?ReadableDataInterface $preparedDataReader,
         public readonly ColumnInterface $column,
         public readonly array|object $data,
         public readonly int|string $key,

src/Column/SerialColumnRenderer.php

@@ -4,6 +4,7 @@
 
 namespace Yiisoft\Yii\DataView\Column;
 
+use Yiisoft\Data\Paginator\OffsetPaginator;
 use Yiisoft\Yii\DataView\Column\Base\Cell;
 use Yiisoft\Yii\DataView\Column\Base\DataContext;
 use Yiisoft\Yii\DataView\Column\Base\GlobalContext;
@@ -26,9 +27,13 @@ public function renderHeader(ColumnInterface $column, Cell $cell, HeaderContext
 
     public function renderBody(ColumnInterface $column, Cell $cell, DataContext $context): Cell
     {
+        $index = $context->preparedDataReader instanceof OffsetPaginator
+            ? $context->preparedDataReader->getOffset() + $context->index + 1
+            : $context->index + 1;
+
         return $cell
             ->addAttributes($column->bodyAttributes)
-            ->content((string)($context->index + 1));
+            ->content((string) $index);
     }
 
     public function renderFooter(ColumnInterface $column, Cell $cell, GlobalContext $context): Cell

src/GridView.php

@@ -637,7 +637,7 @@ protected function renderItems(
 
             $tags = [];
             foreach ($columns as $i => $column) {
-                $context = new DataContext($column, $value, $key, $index);
+                $context = new DataContext($preparedDataReader, $column, $value, $key, $index);
                 $cell = $renderers[$i]->renderBody($column, new Cell($this->bodyCellAttributes), $context);
                 $tags[] = $cell->isEmptyContent()
                     ? Html::td($this->emptyCell, $this->emptyCellAttributes)->encode(false)