Add properties and default values for orphans and widows css support

DEVSIX-3664

Author: BlackEgoist

styled-xml-parser/src/main/java/com/itextpdf/styledxmlparser/css/CommonCssConstants.java

@@ -463,6 +463,11 @@ public class CommonCssConstants {
      */
     public static final String OPACITY = "opacity";
 
+    /**
+     * The Constant OPRPHANS.
+     */
+    public static final String ORPHANS = "orphans";
+
     /**
      * The Constant OUTLINE.
      */
@@ -618,6 +623,11 @@ public class CommonCssConstants {
      */
     public static final String WHITE_SPACE = "white-space";
 
+    /**
+     * The Constant WIDOWS.
+     */
+    public static final String WIDOWS = "widows";
+
     /**
      * The Constant WIDTH.
      */

styled-xml-parser/src/main/java/com/itextpdf/styledxmlparser/css/resolve/CssDefaults.java

@@ -142,6 +142,9 @@ public class CssDefaults {
         defaultValues.put(CommonCssConstants.WHITE_SPACE, CommonCssConstants.NORMAL);
         defaultValues.put(CommonCssConstants.WIDTH, CommonCssConstants.AUTO);
 
+        defaultValues.put(CommonCssConstants.ORPHANS, "2");
+        defaultValues.put(CommonCssConstants.WIDOWS, "2");
+
         // TODO not complete
     }
 

styled-xml-parser/src/main/java/com/itextpdf/styledxmlparser/css/resolve/CssInheritance.java

@@ -126,7 +126,10 @@ public class CssInheritance implements IStyleInheritance {
             CommonCssConstants.LIST_STYLE_TYPE,
 
             // Generated Content for Paged Media
-            CommonCssConstants.QUOTES
+            CommonCssConstants.QUOTES,
+
+            CommonCssConstants.ORPHANS,
+            CommonCssConstants.WIDOWS
     ));
 
     /**