Merge pull request #786 from dees040/bug/copy

General : Fixed copying bug when presentation had multiple slides

Author: Progi1984

docs/changes/1.1.0.md

@@ -34,6 +34,7 @@
 - PowerPoint2007 Writer : Fixed broken animation for first shape - [@shannan1989](https://github.com/shannan1989) in [#783](https://github.com/PHPOffice/PHPPresentation/pull/783)
 - Samples : Allow to run without composer - [@pal-software](https://github.com/pal-software) in [#784](https://github.com/PHPOffice/PHPPresentation/pull/784)
 - PowerPoint2007 Writer: Extract relations from nested ShapeContainerInterface objects - [@DennisBirkholz](https://github.com/DennisBirkholz) in [#785](https://github.com/PHPOffice/PHPPresentation/pull/785)
+- General : Fixed copying bug when presentation had multiple slides [@dees040](https://github.com/dees040) in [#786](https://github.com/PHPOffice/PHPPresentation/pull/786)
 
 ## Miscellaneous
 

src/PhpPresentation/PhpPresentation.php

@@ -312,11 +312,26 @@ public function copy(): self
         $copied = clone $this;
 
         $slideCount = count($this->slideCollection);
+
+        // Because the rebindParent() method on AbstractSlide removes the slide
+        // from the parent (current $this which we're cloning) presentation, we
+        // save the collection. This way, after the copying has finished, we can
+        // return the slides to the original presentation.
+        $oldSlideCollection = $this->slideCollection;
+        $newSlideCollection = [];
+
         for ($i = 0; $i < $slideCount; ++$i) {
-            $this->slideCollection[$i] = $this->slideCollection[$i]->copy();
-            $this->slideCollection[$i]->rebindParent($this);
+            $newSlideCollection[$i] = $oldSlideCollection[$i]->copy();
+            $newSlideCollection[$i]->rebindParent($copied);
         }
 
+        // Give the copied presentation a copied slide collection which the
+        // copied slides have been rebind to the copied presentation.
+        $copied->slideCollection = $newSlideCollection;
+
+        // Return the original slides to the original presentation.
+        $this->slideCollection = $oldSlideCollection;
+
         return $copied;
     }
 

tests/PhpPresentation/Tests/PhpPresentationTest.php

@@ -86,7 +86,12 @@ public function testAddExternalSlide(): void
     public function testCopy(): void
     {
         $object = new PhpPresentation();
-        self::assertInstanceOf('PhpOffice\\PhpPresentation\\PhpPresentation', $object->copy());
+        $object->createSlide();
+
+        $copy = $object->copy();
+
+        self::assertInstanceOf('PhpOffice\\PhpPresentation\\PhpPresentation', $copy);
+        self::assertEquals(2, $copy->getSlideCount());
     }
 
     /**