Implement remove if empty paragraph.

[gpl/argeo-suite.git] / publishing / org.argeo.publishing.ui / src / org / argeo / docbook / DbkUtils.java

diff --git a/publishing/org.argeo.publishing.ui/src/org/argeo/docbook/DbkUtils.java b/publishing/org.argeo.publishing.ui/src/org/argeo/docbook/DbkUtils.java
index 6bcecb7b3e9fec2d3efa61161f8d94acffe57210..b654c73178646597e50badabdbe2c6e13989a725 100644 (file)
--- a/publishing/org.argeo.publishing.ui/src/org/argeo/docbook/DbkUtils.java
+++ b/publishing/org.argeo.publishing.ui/src/org/argeo/docbook/DbkUtils.java
@@ -53,6 +53,16 @@ public class DbkUtils {
                return Jcr.getName(node).equals(type.get());
        }
 
+       /** Whether this node is a DocBook type. */
+       public static boolean isDbk(Node node) {
+               String name = Jcr.getName(node);
+               for (DbkType type : DbkType.values()) {
+                       if (name.equals(type.get()))
+                               return true;
+               }
+               return false;
+       }
+
        public static String getTitle(Node node) {
                return JcrxApi.getXmlValue(node, DbkType.title.get());
        }
@@ -96,6 +106,32 @@ public class DbkUtils {
                return p;
        }
 
+       /**
+        * Removes a paragraph if it empty. The sesison is not saved.
+        * 
+        * @return true if the paragraph was empty and it was removed
+        */
+       public static boolean removeIfEmptyParagraph(Node node) {
+               try {
+                       if (isDbk(node, DbkType.para)) {
+                               NodeIterator nit = node.getNodes();
+                               if (!nit.hasNext())
+                                       return false;// log this unexpected situation?
+                               Node first = nit.nextNode();
+                               if (nit.hasNext())
+                                       return false;
+                               String str = JcrxApi.getXmlValue(first);
+                               if (str != null && str.trim().equals("")) {
+                                       node.remove();
+                                       return true;
+                               }
+                       }
+                       return false;
+               } catch (RepositoryException e) {
+                       throw new JcrException("Cannot remove possibly empty paragraph", e);
+               }
+       }
+
        public static Node insertImageAfter(Node sibling) {
                try {