While using PDFBox 1.5.0 I had the need to insert a child as the first
child of an outline but there was no way to do this. You can only
append to the outline.
After some investigation I determined that the new code needed to go
into "PDOutlineNode.java" in package
"org.apache.pdfbox.pdmodel.interactive.documentnavigation.outline".
The following is the code for a new method I wrote and tested. Since I
can not commit the code I will leave that to someone who can. The code
has been tested, but another pair of eyes never hurts.
********* Begin code for new method in PDOutlineNode.java *****************
/**
* Insert this node before the current first child node or as the only
* node if there are no children.
* @param outlineNode
*/
public void insertFirstChild( PDOutlineItem outlineNode )
{
PDOutlineItem wasFirstNode = this.getFirstChild();
int currentOpenCount = getOpenCount();
int numberOfOpenNodesWeAreAdding = 1;
outlineNode.setParent( this );
PDOutlineItem lastAddedNode = outlineNode;
while(lastAddedNode.getNextSibling() != null)
{
lastAddedNode = lastAddedNode.getNextSibling();
lastAddedNode.setParent(this);
}
setFirstChild( outlineNode );
// 1 for the the item we are adding;
if( outlineNode.isNodeOpen() )
{
numberOfOpenNodesWeAreAdding += outlineNode.getOpenCount();
}
// now update the count like appendChild() does
if( isNodeOpen() )
{
setOpenCount( currentOpenCount +
numberOfOpenNodesWeAreAdding );
}
else
{
setOpenCount( currentOpenCount -
numberOfOpenNodesWeAreAdding );
}
// link the 2 subsets together
// end of added list -> to first of old set
lastAddedNode.setNextSibling(wasFirstNode);
// first of old set -> back to last of added set
wasFirstNode.setPreviousSibling(lastAddedNode);
// tell the parent about the new node(s) we just added
updateParentOpenCount( numberOfOpenNodesWeAreAdding );
// update last if there were no child nodes when we started.
if ( wasFirstNode == null )
setLastChild( lastAddedNode );
// else previous last is still the last one
}
********* end code *****************
--
Charles Simon
Principal Software Engineer
Select Business Solutions, Inc.
35 Nutmeg Drive
Trumbull, CT 06611
http://www.selectbs.com
