#447 fix parsing CSS head rules

flying-saucer-core/src/main/java/org/xhtmlrenderer/css/parser/CSSParser.java

@@ -51,6 +51,7 @@
 import java.util.Map;
 import java.util.Set;
 
+import static java.util.Collections.emptyMap;
 import static java.util.Locale.ROOT;
 import static org.w3c.dom.css.CSSPrimitiveValue.CSS_NUMBER;
 import static org.w3c.dom.css.CSSPrimitiveValue.CSS_PERCENTAGE;
@@ -550,7 +551,7 @@ private void page(Stylesheet stylesheet) throws IOException {
                             skip_whitespace();
                             break;
                         } else if (t == Token.TK_AT_RULE) {
-                            margins = margin(stylesheet);
+                            margins.putAll(margin(stylesheet));
                         } else {
                             declaration_list(ruleset, false, true, false);
                         }
@@ -576,21 +577,19 @@ private void page(Stylesheet stylesheet) throws IOException {
 //    margin_sym S* '{' declaration [ ';' S* declaration? ]* '}' S*
 //    ;
     private Map<MarginBoxName, List<PropertyDeclaration>> margin(Stylesheet stylesheet) throws IOException {
-        Map<MarginBoxName, List<PropertyDeclaration>> margins = new HashMap<>();
-
         Token t = next();
         if (t != Token.TK_AT_RULE) {
             error(new CSSParseException(t, Token.TK_AT_RULE, getCurrentLine()), "at rule", true);
             recover(true, false);
-            return margins;
+            return emptyMap();
         }
 
         String name = getTokenValue(t);
         MarginBoxName marginBoxName = MarginBoxName.valueOf(name);
         if (marginBoxName == null) {
             error(new CSSParseException(name + " is not a valid margin box name", getCurrentLine()), "at rule", true);
             recover(true, false);
-            return margins;
+            return emptyMap();
         }
 
         skip_whitespace();
@@ -605,7 +604,7 @@ private Map<MarginBoxName, List<PropertyDeclaration>> margin(Stylesheet styleshe
                     push(t);
                     throw new CSSParseException(t, Token.TK_RBRACE, getCurrentLine());
                 }
-                margins.put(marginBoxName, ruleset.getPropertyDeclarations());
+                return Map.of(marginBoxName, ruleset.getPropertyDeclarations());
             } else {
                 push(t);
                 throw new CSSParseException(t, Token.TK_LBRACE, getCurrentLine());
@@ -614,7 +613,7 @@ private Map<MarginBoxName, List<PropertyDeclaration>> margin(Stylesheet styleshe
             error(e, "margin box", true);
             recover(false, false);
         }
-        return margins;
+        return emptyMap();
     }
 
 

flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/HeaderTest.java

@@ -0,0 +1,24 @@
+package org.xhtmlrenderer.pdf;
+
+import com.codeborne.pdftest.PDF;
+import org.junit.jupiter.api.Test;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+import java.io.IOException;
+
+import static com.codeborne.pdftest.assertj.Assertions.assertThat;
+import static org.xhtmlrenderer.pdf.TestUtils.printFile;
+
+public class HeaderTest {
+    private static final Logger log = LoggerFactory.getLogger(HeaderTest.class);
+
+    @Test
+    void pageWithHeader() throws IOException {
+        String fileName = "page-with-header.html";
+        byte[] bytes = Html2Pdf.fromClasspathResource(fileName);
+
+        PDF pdf = printFile(log, bytes, "page-with-header.pdf");
+        assertThat(pdf).containsText("Header", "Body", "Footer");
+    }
+}

flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/TestUtils.java

@@ -0,0 +1,19 @@
+package org.xhtmlrenderer.pdf;
+
+import com.codeborne.pdftest.PDF;
+import org.slf4j.Logger;
+
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+
+public class TestUtils {
+    public static PDF printFile(Logger log, byte[] pdf, String filename) throws IOException {
+        File file = new File("target", filename);
+        try (FileOutputStream o = new FileOutputStream(file)) {
+            o.write(pdf);
+        }
+        log.info("Generated PDF: {}", file.getAbsolutePath());
+        return new PDF(pdf);
+    }
+}

flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/WordBreakTest.java

@@ -5,28 +5,18 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import java.io.File;
-import java.io.FileOutputStream;
 import java.io.IOException;
 
 import static com.codeborne.pdftest.assertj.Assertions.assertThat;
+import static org.xhtmlrenderer.pdf.TestUtils.printFile;
 
 public class WordBreakTest {
     private static final Logger log = LoggerFactory.getLogger(WordBreakTest.class);
 
     @Test
     void breakAll() throws IOException {
-
-        byte[] pdf = Html2Pdf.fromClasspathResource("org/xhtmlrenderer/pdf/break-all.html");
-        printFile(pdf, "break-all.pdf");
-        assertThat(new PDF(pdf)).containsExactText("HelloWorld1\nHelloWorld2\nHelloWorld3\nHelloWorld4\nHelloWorld5\n");
-    }
-
-    private static void printFile(byte[] pdf, String filename) throws IOException {
-        File file = new File("target", filename);
-        try (FileOutputStream o = new FileOutputStream(file)) {
-            o.write(pdf);
-        }
-        log.info("Generated PDF: {}", file.getAbsolutePath());
+        byte[] result = Html2Pdf.fromClasspathResource("org/xhtmlrenderer/pdf/break-all.html");
+        PDF pdf = printFile(log, result, "break-all.pdf");
+        assertThat(pdf).containsExactText("HelloWorld1\nHelloWorld2\nHelloWorld3\nHelloWorld4\nHelloWorld5\n");
     }
 }

flying-saucer-pdf/src/test/java/org/xhtmlrenderer/pdf/bug/FloatedTableCellTest.java

@@ -7,11 +7,10 @@
 import org.xhtmlrenderer.pdf.ITextRenderer;
 import org.xhtmlrenderer.resource.XMLResource;
 
-import java.io.File;
-import java.io.FileOutputStream;
 import java.io.IOException;
 
 import static com.codeborne.pdftest.assertj.Assertions.assertThat;
+import static org.xhtmlrenderer.pdf.TestUtils.printFile;
 
 /**
  * Reproducible example for <a href="https://github.com/flyingsaucerproject/flyingsaucer/issues/276">issue 276</a>
@@ -37,29 +36,19 @@ void tableWithFloatedCell() throws IOException {
 
         ITextRenderer renderer = new ITextRenderer();
 		byte[] result = renderer.createPDF(XMLResource.load(page).getDocument());
-		printFile(result, "table-with-floated-cell.pdf");
-		PDF pdf = new PDF(result);
+		PDF pdf = printFile(log, result, "table-with-floated-cell.pdf");
 		assertThat(pdf).containsText("first cell", "second cell");
 	}
-	
+
 	@Test
 	void tableCell() throws IOException {
 		String page = """
 			<table><tr><td style="float:left;">first cell {float:left;}</td></tr></table>""";
 
         ITextRenderer renderer = new ITextRenderer();
 		byte[] result = renderer.createPDF(XMLResource.load(page).getDocument());
-		printFile(result, "table-cell.pdf");
-
-		PDF pdf = new PDF(result);		
+
+		PDF pdf = printFile(log, result, "table-cell.pdf");
 		assertThat(pdf).containsText("first cell");
 	}
-
-	private static void printFile(byte[] pdf, String filename) throws IOException {
-		File file = new File("target", filename);
-		try (FileOutputStream o = new FileOutputStream(file)) {
-			o.write(pdf);
-		}
-		log.info("Generated PDF: {}", file.getAbsolutePath());
-	}
 }

flying-saucer-pdf/src/test/resources/page-with-header.html

@@ -0,0 +1,32 @@
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en">
+
+<head>
+    <style>
+        @page {
+            size: 200px 200px;
+            @top-left {
+                content: element(header);
+            }
+            @bottom-left {
+                content: element(footer);
+            }
+        }
+
+        #header {
+            position: running(header);
+        }
+
+        #footer {
+            position: running(footer);
+        }
+    </style>
+    <title></title>
+</head>
+
+<body>
+<div id="header">Header</div>
+<div id="body">Body</div>
+<div id="footer">Footer</div>
+</body>
+
+</html>