Add setter for background-image and List of background-images

DEVSIX-1948

Autoported commit.
Original commit hash: [3ce2c4b32]

Author: Eugene Bochilo

itext.tests/itext.layout.tests/itext/layout/BackgroundImageTest.cs

@@ -159,7 +159,7 @@ public virtual void BackgroundImageForText() {
                 Document doc = new Document(pdfDocument);
                 Text textElement = new Text("Lorem ipsum dolor sit amet, consectetur adipiscing elit, " + "sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. "
                     );
-                textElement.SetProperty(Property.BACKGROUND_IMAGE, backgroundImage);
+                textElement.SetBackgroundImage(backgroundImage);
                 textElement.SetFontSize(50);
                 doc.Add(new Paragraph(textElement));
             }
@@ -461,7 +461,7 @@ private void BackgroundXObjectGenericTest(String filename, iText.Layout.Properti
                  + "in voluptate velit esse cillum dolore eu fugiat nulla pariatur. " + "Excepteur sint occaecat cupidatat non proident, sunt in culpa qui "
                  + "officia deserunt mollit anim id est laborum. ";
             Div div = new Div().Add(new Paragraph(text + text + text));
-            div.SetProperty(Property.BACKGROUND_IMAGE, backgroundImage);
+            div.SetBackgroundImage(backgroundImage);
             doc.Add(div);
             pdfDocument.Close();
             NUnit.Framework.Assert.IsNull(new CompareTool().CompareByContent(outFileName, cmpFileName, DESTINATION_FOLDER

itext/itext.layout/itext/layout/ElementPropertyContainer.cs

@@ -478,6 +478,28 @@ public virtual T SetBackgroundColor(Color backgroundColor, float opacity, float
             return (T)(Object)this;
         }
 
+        /// <summary>Specifies a background image for the Element.</summary>
+        /// <param name="image">
+        /// 
+        /// <see cref="iText.Layout.Properties.BackgroundImage"/>
+        /// </param>
+        /// <returns>this Element.</returns>
+        public virtual T SetBackgroundImage(BackgroundImage image) {
+            SetProperty(Property.BACKGROUND_IMAGE, image);
+            return (T)(Object)this;
+        }
+
+        /// <summary>Specifies a list of background images for the Element.</summary>
+        /// <param name="imagesList">
+        /// List of
+        /// <see cref="iText.Layout.Properties.BackgroundImage"/>
+        /// </param>
+        /// <returns>this Element.</returns>
+        public virtual T SetBackgroundImage(IList<BackgroundImage> imagesList) {
+            SetProperty(Property.BACKGROUND_IMAGE, imagesList);
+            return (T)(Object)this;
+        }
+
         /// <summary>Sets a border for all four edges of this Element with customizable color, width, pattern type.</summary>
         /// <param name="border">
         /// a customized

port-hash

@@ -1 +1 @@
-5d6db1e9bafc6bc2e35c9b0a1d71ff31b1f5dc63
+3ce2c4b328665253b6ecdac0797b6f5764a023bd