Update Html.php (#3535)

* Update Html.php

Add position attr for image whitch driving by MemoryDrawing

* add unit test for pr#3535

* Fix code styles

* Fix code styles

* use a local image instead of  web image

* add image for pr#3535

* code style fix

src/PhpSpreadsheet/Writer/Html.php

@@ -693,7 +693,8 @@ private function writeImageInCell(Worksheet $worksheet, $coordinates)
                     //  max-width: 100% ensures that image doesnt overflow containing cell
                     //  width: X sets width of supplied image.
                     //  As a result, images bigger than cell will be contained and images smaller will not get stretched
-                    $html .= '<img alt="' . $filedesc . '" src="' . $dataUri . '" style="max-width:100%;width:' . $drawing->getWidth() . 'px;" />';
+                    $html .= '<img alt="' . $filedesc . '" src="' . $dataUri . '" style="max-width:100%;width:' . $drawing->getWidth() . 'px;left: ' .
+                    $drawing->getOffsetX() . 'px; top: ' . $drawing->getOffsetY() . 'px;position: absolute; z-index: 1;" />';
                 }
             }
         }

tests/PhpSpreadsheetTests/Writer/Html/MemoryDrawingOffsetTest.php

@@ -0,0 +1,47 @@
+<?php
+
+namespace PhpOffice\PhpSpreadsheetTests\Writer\Html;
+
+use PhpOffice\PhpSpreadsheet\Spreadsheet;
+use PhpOffice\PhpSpreadsheet\Worksheet\MemoryDrawing;
+use PhpOffice\PhpSpreadsheet\Writer\Html;
+use PHPUnit\Framework\TestCase;
+
+class MemoryDrawingOffsetTest extends TestCase
+{
+    /**
+     * @dataProvider dataProvider
+     */
+    public function testMemoryDrawingOffset(int $w, int $h, int $x, int $y): void
+    {
+        $spreadsheet = new Spreadsheet();
+        $sheet = $spreadsheet->getActiveSheet();
+
+        $image = file_get_contents(__DIR__ . '/../../../data/Reader/HTML/memoryDrawingTest.jpg');
+        self::assertNotFalse($image, 'unable to read file');
+        $image = imagecreatefromstring($image);
+        self::assertNotFalse($image, 'unable to create image from string');
+        $drawing = new MemoryDrawing();
+        $drawing->setImageResource($image)
+            ->setResizeProportional(false) //是否保持比例
+            ->setWidthAndHeight($w, $h) //图片宽高,原始尺寸 100*100
+            ->setOffsetX($x)
+            ->setOffsetY($y)
+            ->setWorksheet($sheet);
+
+        $writer = new Html($spreadsheet);
+        $html = $writer->generateHtmlAll();
+        self::assertStringContainsString('width:' . $w . 'px;left: ' . $x . 'px; top: ' . $y . 'px;position: absolute;', $html);
+        $spreadsheet->disconnectWorksheets();
+        unset($spreadsheet);
+    }
+
+    public function dataProvider(): array
+    {
+        return [
+            [33, 19, 0, 20],
+            [129, 110, 12, -3],
+            [55, 110, 33, 42],
+        ];
+    }
+}