Alter Version

vendor/PhpSpreadsheet/Cell/AddressHelper.php

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+<?php
+
+namespace PhpOffice\PhpSpreadsheet\Cell;
+
+use PhpOffice\PhpSpreadsheet\Exception;
+
+class AddressHelper
+{
+    /**
+     * Converts an R1C1 format cell address to an A1 format cell address.
+     */
+    public static function convertToA1(
+        string $address,
+        int $currentRowNumber = 1,
+        int $currentColumnNumber = 1
+    ): string {
+        $validityCheck = preg_match('/^(R(\[?-?\d*\]?))(C(\[?-?\d*\]?))$/i', $address, $cellReference);
+
+        if ($validityCheck === 0) {
+            throw new Exception('Invalid R1C1-format Cell Reference');
+        }
+
+        $rowReference = $cellReference[2];
+        //    Empty R reference is the current row
+        if ($rowReference === '') {
+            $rowReference = (string) $currentRowNumber;
+        }
+        //    Bracketed R references are relative to the current row
+        if ($rowReference[0] === '[') {
+            $rowReference = $currentRowNumber + trim($rowReference, '[]');
+        }
+        $columnReference = $cellReference[4];
+        //    Empty C reference is the current column
+        if ($columnReference === '') {
+            $columnReference = (string) $currentColumnNumber;
+        }
+        //    Bracketed C references are relative to the current column
+        if (is_string($columnReference) && $columnReference[0] === '[') {
+            $columnReference = $currentColumnNumber + trim($columnReference, '[]');
+        }
+
+        if ($columnReference <= 0 || $rowReference <= 0) {
+            throw new Exception('Invalid R1C1-format Cell Reference, Value out of range');
+        }
+        $A1CellReference = Coordinate::stringFromColumnIndex($columnReference) . $rowReference;
+
+        return $A1CellReference;
+    }
+
+    /**
+     * Converts a formula that uses R1C1 format cell address to an A1 format cell address.
+     */
+    public static function convertFormulaToA1(
+        string $formula,
+        int $currentRowNumber = 1,
+        int $currentColumnNumber = 1
+    ): string {
+        if (substr($formula, 0, 3) == 'of:') {
+            $formula = substr($formula, 3);
+            $temp = explode('"', $formula);
+            $key = false;
+            foreach ($temp as &$value) {
+                //    Only replace in alternate array entries (i.e. non-quoted blocks)
+                if ($key = !$key) {
+                    $value = str_replace(['[.', '.', ']'], '', $value);
+                }
+            }
+        } else {
+            //    Convert R1C1 style references to A1 style references (but only when not quoted)
+            $temp = explode('"', $formula);
+            $key = false;
+            foreach ($temp as &$value) {
+                //    Only replace in alternate array entries (i.e. non-quoted blocks)
+                if ($key = !$key) {
+                    preg_match_all('/(R(\[?-?\d*\]?))(C(\[?-?\d*\]?))/', $value, $cellReferences, PREG_SET_ORDER + PREG_OFFSET_CAPTURE);
+                    //    Reverse the matches array, otherwise all our offsets will become incorrect if we modify our way
+                    //        through the formula from left to right. Reversing means that we work right to left.through
+                    //        the formula
+                    $cellReferences = array_reverse($cellReferences);
+                    //    Loop through each R1C1 style reference in turn, converting it to its A1 style equivalent,
+                    //        then modify the formula to use that new reference
+                    foreach ($cellReferences as $cellReference) {
+                        $A1CellReference = self::convertToA1($cellReference[0][0], $currentRowNumber, $currentColumnNumber);
+                        $value = substr_replace($value, $A1CellReference, $cellReference[0][1], strlen($cellReference[0][0]));
+                    }
+                }
+            }
+        }
+        unset($value);
+        //    Then rebuild the formula string
+        $formula = implode('"', $temp);
+
+        return $formula;
+    }
+
+    /**
+     * Converts an A1 format cell address to an R1C1 format cell address.
+     * If $currentRowNumber or $currentColumnNumber are provided, then the R1C1 address will be formatted as a relative address.
+     */
+    public static function convertToR1C1(
+        string $address,
+        ?int $currentRowNumber = null,
+        ?int $currentColumnNumber = null
+    ): string {
+        $validityCheck = preg_match('/^\$?([A-Z]{1,3})\$?(\d{1,7})$/i', $address, $cellReference);
+
+        if ($validityCheck === 0) {
+            throw new Exception('Invalid A1-format Cell Reference');
+        }
+
+        $columnId = Coordinate::columnIndexFromString($cellReference[1]);
+        $rowId = (int) $cellReference[2];
+
+        if ($currentRowNumber !== null) {
+            if ($rowId === $currentRowNumber) {
+                $rowId = '';
+            } else {
+                $rowId = '[' . ($rowId - $currentRowNumber) . ']';
+            }
+        }
+
+        if ($currentColumnNumber !== null) {
+            if ($columnId === $currentColumnNumber) {
+                $columnId = '';
+            } else {
+                $columnId = '[' . ($columnId - $currentColumnNumber) . ']';
+            }
+        }
+
+        $R1C1Address = "R{$rowId}C{$columnId}";
+
+        return $R1C1Address;
+    }
+}