From f366c0f257603334e6628fcaeaeabfa8ea6b8589 Mon Sep 17 00:00:00 2001
From: Alex Wright <alex@xeentech.com>
Date: Sun, 13 Dec 2020 15:29:18 +0100
Subject: [PATCH] Change how ReadFilters are interpreted

---
 .../Reader/Xlsx/ColumnAndRowAttributes.php     | 18 ++++++++++++------
 1 file changed, 12 insertions(+), 6 deletions(-)

diff --git a/src/PhpSpreadsheet/Reader/Xlsx/ColumnAndRowAttributes.php b/src/PhpSpreadsheet/Reader/Xlsx/ColumnAndRowAttributes.php
index 4134b2f1..8913d6e0 100644
--- a/src/PhpSpreadsheet/Reader/Xlsx/ColumnAndRowAttributes.php
+++ b/src/PhpSpreadsheet/Reader/Xlsx/ColumnAndRowAttributes.php
@@ -121,13 +121,16 @@ class ColumnAndRowAttributes extends BaseParserClass
 
     private function isFilteredColumn(IReadFilter $readFilter, $columnCoordinate, array $rowsAttributes)
     {
+        if (empty($rowAttributes)) {
+            return false;
+        }
         foreach ($rowsAttributes as $rowCoordinate => $rowAttributes) {
-            if (!$readFilter->readCell($columnCoordinate, $rowCoordinate, $this->worksheet->getTitle())) {
-                return true;
+            if ($readFilter->readCell($columnCoordinate, $rowCoordinate, $this->worksheet->getTitle())) {
+                return false;
             }
         }
 
-        return false;
+        return true;
     }
 
     private function readColumnAttributes(SimpleXMLElement $worksheetCols, $readDataOnly)
@@ -173,13 +176,16 @@ class ColumnAndRowAttributes extends BaseParserClass
 
     private function isFilteredRow(IReadFilter $readFilter, $rowCoordinate, array $columnsAttributes)
     {
+        if (empty($columnAttributes)) {
+            return false;
+        }
         foreach ($columnsAttributes as $columnCoordinate => $columnAttributes) {
-            if (!$readFilter->readCell($columnCoordinate, $rowCoordinate, $this->worksheet->getTitle())) {
-                return true;
+            if ($readFilter->readCell($columnCoordinate, $rowCoordinate, $this->worksheet->getTitle())) {
+                return false;
             }
         }
 
-        return false;
+        return true;
     }
 
     private function readRowAttributes(SimpleXMLElement $worksheetRow, $readDataOnly)