Bugfix/1509 readd header and footer

openpdf/src/main/java/com/lowagie/text/pdf/PdfDocument.java

@@ -872,6 +872,7 @@ public boolean newPage() {
         if (isPageEmpty()) {
             setNewPageSizeAndMargins();
             resetText(true);
+            initPage();
             return false;
         }
         if (!open || close) {

openpdf/src/test/java/com/lowagie/text/pdf/PdfDocumentTest.java

@@ -1,18 +1,24 @@
 package com.lowagie.text.pdf;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import com.lowagie.text.Document;
 import com.lowagie.text.Element;
+import com.lowagie.text.Font;
+import com.lowagie.text.HeaderFooter;
+import com.lowagie.text.PageSize;
 import com.lowagie.text.Paragraph;
+import com.lowagie.text.Phrase;
+import java.io.ByteArrayOutputStream;
 import java.util.Arrays;
 import java.util.List;
 import org.junit.jupiter.api.DynamicTest;
+import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.TestFactory;
 
 class PdfDocumentTest {
-
     private static final String PARAGRAPH_TEXT_1 = "Text above table";
-
     private static final String PARAGRAPH_TEXT_2 = "Text below table";
 
     @TestFactory
@@ -49,12 +55,39 @@ List<DynamicTest> testCreateWithAllElementsInOneCell() {
                 DynamicTest.dynamicTest("element text should be '" + PARAGRAPH_TEXT_2 + "'",
                         () -> assertEquals(paragraph2.toString(),
                                 getCellElements(result).get(3).getChunks().toString()
-                                )));
+                        )));
     }
 
     private List<Element> getCellElements(PdfPTable result) {
         PdfPCell firstCell = result.getRows().get(0).getCells()[0];
         return firstCell.getColumn().compositeElements;
     }
 
+    @Test
+    void createPdfFileWithAutoPageBreak() throws Exception {
+        final var document = new Document(PageSize.A4);
+        final var writer = PdfWriter.getInstance(document, new ByteArrayOutputStream());
+        document.setHeader(new HeaderFooter(false, new Phrase("Header")));
+        document.setFooter(new HeaderFooter(false, new Phrase("Footer")));
+        document.open();
+
+        for (int i = 0; i < 50; i++) {
+            if (i == 37) {
+                document.newPage();
+            }
+            final var pdf = writer.getPdfDocument();
+            final var headerFielt = PdfDocument.class.getDeclaredField("text");
+            headerFielt.setAccessible(true);
+            final var text = (PdfContentByte) headerFielt.get(pdf);
+            assertTrue(String.valueOf(text.getInternalBuffer()).contains("Header"),
+                    "Header not found: %d".formatted(i));
+            assertTrue(String.valueOf(text.getInternalBuffer()).contains("Footer"),
+                    "Footer not found: %d".formatted(i));
+            document.add(new Paragraph(
+                    "This is line " + i + " of a long text to force automatic page breaks.",
+                    new Font(Font.HELVETICA, 12)
+            ));
+        }
+        document.close();
+    }
 }