Merge pull request #3382 from PHPOffice/Issue-3381_Scientific-NumberFormat-Decimal-Precision

Issue 3381 - Fix decimal precision for Scientific Number Format Mask

Author: MarkBaker

CHANGELOG.md

@@ -35,7 +35,7 @@ and this project adheres to [Semantic Versioning](https://semver.org).
 - 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)
-
+- 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)
 
 ## 1.27.1 - 2023-02-08
 

src/PhpSpreadsheet/Style/NumberFormat/NumberFormatter.php

@@ -164,7 +164,10 @@ private static function formatStraightNumericValue($value, string $format, array
 
         if (preg_match('/[0#]E[+-]0/i', $format)) {
             //    Scientific format
-            return sprintf('%5.2E', $valueFloat);
+            $decimals = strlen($right);
+            $size = $decimals + 3;
+
+            return sprintf("%{$size}.{$decimals}E", $valueFloat);
         } elseif (preg_match('/0([^\d\.]+)0/', $format) || substr_count($format, '.') > 1) {
             if ($valueFloat == floor($valueFloat) && substr_count($format, '.') === 1) {
                 $value *= 10 ** strlen(explode('.', $format)[1]);

tests/data/Style/NumberFormat.php

@@ -1479,4 +1479,19 @@
         '1111.119',
         '[$€-en_US]_(#,##0.00_);[$€-en_US] (#,##0.00)',
     ],
+    [
+        '-1.2E+4',
+        -12345.6789,
+        '0.0E+00',
+    ],
+    [
+        '-1.23E+4',
+        -12345.6789,
+        '0.00E+00',
+    ],
+    [
+        '-1.235E+4',
+        -12345.6789,
+        '0.000E+00',
+    ],
 ];