Sheet visibility - XLSX writer and reader

src/Spout/Writer/Common/Entity/Sheet.php

@@ -21,6 +21,9 @@ class Sheet
     /** @var string Name of the sheet */
     private $name;
 
+    /** @var bool Visibility of the sheet */
+    private $isVisible;
+
     /** @var SheetManager Sheet manager */
     private $sheetManager;
 
@@ -38,6 +41,7 @@ class Sheet
         $this->sheetManager->markWorkbookIdAsUsed($associatedWorkbookId);
 
         $this->setName(self::DEFAULT_SHEET_NAME_PREFIX . ($sheetIndex + 1));
+        $this->setIsVisible(true);
     }
 
     /**
@@ -85,4 +89,23 @@ class Sheet
 
         return $this;
     }
+
+    /**
+     * @return bool isVisible Visibility of the sheet
+     */
+    public function isVisible()
+    {
+        return $this->isVisible;
+    }
+
+   /**
+    * @param bool $isVisible Visibility of the sheet
+    * @return Sheet
+    */
+   public function setIsVisible($isVisible)
+    {
+        $this->isVisible = $isVisible;
+
+        return $this;
+    }
 }

src/Spout/Writer/XLSX/Helper/FileSystemHelper.php

@@ -307,8 +307,9 @@ EOD;
         /** @var Worksheet $worksheet */
         foreach ($worksheets as $worksheet) {
             $worksheetName = $worksheet->getExternalSheet()->getName();
+            $worksheetVisibility = $worksheet->getExternalSheet()->isVisible() ? 'visible' : 'hidden';
             $worksheetId = $worksheet->getId();
-            $workbookXmlFileContents .= '<sheet name="' . $this->escaper->escape($worksheetName) . '" sheetId="' . $worksheetId . '" r:id="rIdSheet' . $worksheetId . '"/>';
+            $workbookXmlFileContents .= '<sheet name="' . $this->escaper->escape($worksheetName) . '" sheetId="' . $worksheetId . '" r:id="rIdSheet' . $worksheetId . '" state="' . $worksheetVisibility. '"/>';
         }
 
         $workbookXmlFileContents .= <<<'EOD'