Allow single-cell checks on conditional styles, even when the style is configured for a range of cells (#2483)

* Allow single-cell checks on conditional styles, even when the style is configured for a range of cells

src/PhpSpreadsheet/Worksheet/Worksheet.php

@@ -1432,30 +1432,57 @@ class Worksheet implements IComparable
     /**
      * Get conditional styles for a cell.
      *
-     * @param string $coordinate eg: 'A1'
+     * @param string $coordinate eg: 'A1' or 'A1:A3'.
+     *          If a single cell is referenced, then the array of conditional styles will be returned if the cell is
+     *               included in a conditional style range.
+     *          If a range of cells is specified, then the styles will only be returned if the range matches the entire
+     *               range of the conditional.
      *
      * @return Conditional[]
      */
     public function getConditionalStyles($coordinate)
     {
         $coordinate = strtoupper($coordinate);
-        if (!isset($this->conditionalStylesCollection[$coordinate])) {
+        if (strpos($coordinate, ':') !== false) {
-            $this->conditionalStylesCollection[$coordinate] = [];
+            return $this->conditionalStylesCollection[$coordinate] ?? [];
         }
 
-        return $this->conditionalStylesCollection[$coordinate];
+        $cell = $this->getCell($coordinate);
+        foreach (array_keys($this->conditionalStylesCollection) as $conditionalRange) {
+            if ($cell->isInRange($conditionalRange)) {
+                return $this->conditionalStylesCollection[$conditionalRange];
+            }
+        }
+
+        return [];
     }
 
     /**
      * Do conditional styles exist for this cell?
      *
-     * @param string $coordinate eg: 'A1'
+     * @param string $coordinate eg: 'A1' or 'A1:A3'.
+     *          If a single cell is specified, then this method will return true if that cell is included in a
+     *               conditional style range.
+     *          If a range of cells is specified, then true will only be returned if the range matches the entire
+     *               range of the conditional.
      *
      * @return bool
      */
     public function conditionalStylesExists($coordinate)
     {
-        return isset($this->conditionalStylesCollection[strtoupper($coordinate)]);
+        $coordinate = strtoupper($coordinate);
+        if (strpos($coordinate, ':') !== false) {
+            return isset($this->conditionalStylesCollection[strtoupper($coordinate)]);
+        }
+
+        $cell = $this->getCell($coordinate);
+        foreach (array_keys($this->conditionalStylesCollection) as $conditionalRange) {
+            if ($cell->isInRange($conditionalRange)) {
+                return true;
+            }
+        }
+
+        return false;
     }
 
     /**

tests/PhpSpreadsheetTests/Worksheet/ConditionalStyleTest.php

@@ -0,0 +1,91 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Worksheet;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Style\Color;
+use PhpOffice\PhpSpreadsheet\Style\Conditional;
+use PHPUnit\Framework\TestCase;
+
+class ConditionalStyleTest extends TestCase
+{
+    /**
+     * @var Spreadsheet
+     */
+    protected $spreadsheet;
+
+    protected function setUp(): void
+    {
+        parent::setUp();
+
+        $this->spreadsheet = new Spreadsheet();
+
+        $conditional1 = new Conditional();
+        $conditional1->setConditionType(Conditional::CONDITION_CELLIS);
+        $conditional1->setOperatorType(Conditional::OPERATOR_LESSTHAN);
+        $conditional1->addCondition('0');
+        $conditional1->getStyle()->getFont()->getColor()->setARGB(Color::COLOR_RED);
+        $conditional1->getStyle()->getFont()->setBold(true);
+
+        $conditional2 = new Conditional();
+        $conditional2->setConditionType(Conditional::CONDITION_CELLIS);
+        $conditional2->setOperatorType(Conditional::OPERATOR_EQUAL);
+        $conditional2->addCondition('0');
+        $conditional2->getStyle()->getFont()->getColor()->setARGB(Color::COLOR_YELLOW);
+        $conditional2->getStyle()->getFont()->setBold(true);
+
+        $conditional3 = new Conditional();
+        $conditional3->setConditionType(Conditional::CONDITION_CELLIS);
+        $conditional3->setOperatorType(Conditional::OPERATOR_GREATERTHAN);
+        $conditional3->addCondition('0');
+        $conditional3->getStyle()->getFont()->getColor()->setARGB(Color::COLOR_GREEN);
+        $conditional3->getStyle()->getFont()->setBold(true);
+
+        $conditionalStyles = $this->spreadsheet->getActiveSheet()->getStyle('A1:C3')->getConditionalStyles();
+        $conditionalStyles[] = $conditional1;
+        $conditionalStyles[] = $conditional2;
+        $conditionalStyles[] = $conditional3;
+
+        $this->spreadsheet->getActiveSheet()->getStyle('A1:C3')->setConditionalStyles($conditionalStyles);
+
+        $this->spreadsheet->getActiveSheet()
+            ->duplicateConditionalStyle(
+                $this->spreadsheet->getActiveSheet()->getConditionalStyles('A1:C3'),
+                'F1'
+            );
+    }
+
+    /**
+     * @dataProvider cellConditionalStylesProvider
+     */
+    public function testCellHasConditionalStyles(string $cellReference, bool $expectedHasConditionalStyles): void
+    {
+        $cellHasConditionalStyles = $this->spreadsheet->getActiveSheet()->conditionalStylesExists($cellReference);
+
+        self::assertSame($expectedHasConditionalStyles, $cellHasConditionalStyles);
+    }
+
+    /**
+     * @dataProvider cellConditionalStylesProvider
+     */
+    public function testCellGetConditionalStyles(string $cellReference, bool $expectedGetConditionalStyles): void
+    {
+        $cellHasConditionalStyles = $this->spreadsheet->getActiveSheet()->getConditionalStyles($cellReference);
+
+        self::assertSame($expectedGetConditionalStyles, !empty($cellHasConditionalStyles));
+    }
+
+    public function cellConditionalStylesProvider(): array
+    {
+        return [
+            ['A1', true],
+            ['B2', true],
+            ['B4', false],
+            ['A1:C3', true],
+            ['A1:B2', false],
+            ['F1', true],
+            ['F2', false],
+            ['A1:F1', false],
+        ];
+    }
+}