Allow for Table AutoFilter Header Center Alignment for AutoFit column sizing

CHANGELOG.md

@@ -35,7 +35,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - Calculation Engine doesn't evaluate Defined Name when default cell A1 is quote-prefixed [Issue #3335](https://github.com/PHPOffice/PhpSpreadsheet/issues/3335) [PR #3336](https://github.com/PHPOffice/PhpSpreadsheet/pull/3336)
 - XLSX Writer - Array Formulas do not include function prefix [Issue #3337](https://github.com/PHPOffice/PhpSpreadsheet/issues/3337) [PR #3338](https://github.com/PHPOffice/PhpSpreadsheet/pull/3338)
 - Permit Max Column for Row Breaks [Issue #3143](https://github.com/PHPOffice/PhpSpreadsheet/issues/3143) [PR #3345](https://github.com/PHPOffice/PhpSpreadsheet/pull/3345)
-- AutoSize Columns should allow for dropdown icon when AutoFilter is for a Table [Issue #3356](https://github.com/PHPOffice/PhpSpreadsheet/issues/3356) [PR #3358](https://github.com/PHPOffice/PhpSpreadsheet/pull/3358)
+- AutoSize Columns should allow for dropdown icon when AutoFilter is for a Table [Issue #3356](https://github.com/PHPOffice/PhpSpreadsheet/issues/3356) [PR #3358](https://github.com/PHPOffice/PhpSpreadsheet/pull/3358) and for Center Alignment of Headers [Issue #3395](https://github.com/PHPOffice/PhpSpreadsheet/issues/3395) [PR #3399](https://github.com/PHPOffice/PhpSpreadsheet/pull/3399)
 - Decimal Precision for Scientific Number Format Mask [Issue #3381](https://github.com/PHPOffice/PhpSpreadsheet/issues/3381) [PR #3382](https://github.com/PHPOffice/PhpSpreadsheet/pull/3382)
 - Xls Writer Parser Handle Boolean Literals as Function Arguments [Issue #3369](https://github.com/PHPOffice/PhpSpreadsheet/issues/3369) [PR #3391](https://github.com/PHPOffice/PhpSpreadsheet/pull/3391)
 - Conditional Formatting Improvements for Xlsx [Issue #3370](https://github.com/PHPOffice/PhpSpreadsheet/issues/3370) [Issue #3202](https://github.com/PHPOffice/PhpSpreadsheet/issues/3302) [PR #3372](https://github.com/PHPOffice/PhpSpreadsheet/pull/3372)

src/PhpSpreadsheet/Worksheet/Worksheet.php

@@ -25,6 +25,7 @@
 use PhpOffice\PhpSpreadsheet\RichText\RichText;
 use PhpOffice\PhpSpreadsheet\Shared;
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
 use PhpOffice\PhpSpreadsheet\Style\Color;
 use PhpOffice\PhpSpreadsheet\Style\Conditional;
 use PhpOffice\PhpSpreadsheet\Style\NumberFormat;
@@ -781,6 +782,7 @@ public function calculateColumnWidths()
                         }
 
                         $indentAdjustment = $cell->getStyle()->getAlignment()->getIndent();
+                        $indentAdjustment += (int) ($cell->getStyle()->getAlignment()->getHorizontal() === Alignment::HORIZONTAL_CENTER);
 
                         // Calculated value
                         // To formatted string

tests/PhpSpreadsheetTests/Worksheet/AutoSizeTest.php

@@ -3,6 +3,7 @@
 namespace PhpOffice\PhpSpreadsheetTests\Worksheet;
 
 use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Alignment;
 use PhpOffice\PhpSpreadsheet\Worksheet\Table;
 use PhpOffice\PhpSpreadsheet\Worksheet\Table\TableStyle;
 use PhpOffice\PhpSpreadsheet\Worksheet\Worksheet;
@@ -102,4 +103,15 @@ public function testTableWithoutHiddenHeadersAutoSize(): void
 
         self::assertSame(['A' => 5.856, 'B' => 9.283, 'C' => 16.425, 'D' => 6.998], $columnSizes);
     }
+
+    public function testTableWithAutoFilterCenterHeaders(): void
+    {
+        $this->setTable();
+        $this->worksheet->getStyle('A1:D1')->getAlignment()->setHorizontal(Alignment::HORIZONTAL_CENTER);
+
+        $this->worksheet->calculateColumnWidths();
+        $columnSizes = $this->readColumnSizes();
+
+        self::assertSame(['A' => 10.569, 'B' => 13.997, 'C' => 16.425, 'D' => 11.711], $columnSizes);
+    }
 }