8 files changed, 78 insertions, 0 deletions
diff --git a/src/display/drawing-item.cpp b/src/display/drawing-item.cpp
index 8ed74b550..8a438e1c2 100644
--- a/src/display/drawing-item.cpp
+++ b/src/display/drawing-item.cpp
@@ -908,6 +908,30 @@ DrawingItem::pick(Geom::Point const &p, double delta, unsigned flags)
     return NULL;
 }
 
+
+// For debugging: Print drawing tree structure.
+void
+DrawingItem::recursivePrintTree( unsigned level )
+{
+    if (level == 0) {
+        std::cout << "Display Item Tree" << std::endl;
+    }
+    std::cout << "DI: ";
+    for (unsigned i = 0; i < level; ++i) {
+        std::cout << "  ";
+    }
+    SPObject *object = static_cast<SPObject *>(_user_data);
+    if (object) {
+        std::cout << (object->getId()?object->getId():"No object id") << std::endl;
+    } else {
+        std::cout << "No associated object" << std::endl;
+    }
+    for (ChildrenList::iterator i = _children.begin(); i != _children.end(); ++i) {
+        i->recursivePrintTree( level+1 );
+    }
+}
+
+ 
 /**
  * Marks the current visual bounding box of the item for redrawing.
  * This is called whenever the object changes its visible appearance.
diff --git a/src/display/drawing-item.h b/src/display/drawing-item.h
index 9b399e6e3..585f3811f 100644
--- a/src/display/drawing-item.h
+++ b/src/display/drawing-item.h
@@ -131,6 +131,8 @@ public:
     void clip(DrawingContext &dc, Geom::IntRect const &area);
     DrawingItem *pick(Geom::Point const &p, double delta, unsigned flags = 0);
 
+    void recursivePrintTree(unsigned level = 0);  // For debugging
+
 protected:
     enum ChildType {
         CHILD_ORPHAN = 0, // no parent - implies _parent == NULL
diff --git a/src/sp-object.cpp b/src/sp-object.cpp
index 4e45eb824..3b09d80e8 100644
--- a/src/sp-object.cpp
+++ b/src/sp-object.cpp
@@ -1523,6 +1523,22 @@ char* SPObject::textualContent() const
     return g_string_free(text, FALSE);
 }
 
+// For debugging: Print SP tree structure.
+void SPObject::recursivePrintTree( unsigned level )
+{
+    if (level == 0) {
+        std::cout << "SP Object Tree" << std::endl;
+    }
+    std::cout << "SP: ";
+    for (unsigned i = 0; i < level; ++i) {
+        std::cout << "  ";
+    }
+    std::cout << (getId()?getId():"No object id") << std::endl;
+    for (SPObject *child = children; child; child = child->next) {
+        child->recursivePrintTree( level+1 );
+    }
+}
+
 /*
   Local Variables:
   mode:c++
diff --git a/src/sp-object.h b/src/sp-object.h
index d08add0bf..669dfc713 100644
--- a/src/sp-object.h
+++ b/src/sp-object.h
@@ -854,6 +854,8 @@ protected:
 
 public:
 	virtual void read_content();
+
+    void recursivePrintTree(unsigned level = 0);  // For debugging
 };
 
 
diff --git a/src/sp-root.cpp b/src/sp-root.cpp
index 12570e03e..85582e209 100644
--- a/src/sp-root.cpp
+++ b/src/sp-root.cpp
@@ -375,6 +375,15 @@ Inkscape::DrawingItem *SPRoot::show(Inkscape::Drawing &drawing, unsigned int key
         g->setChildTransform(this->c2p);
     }
 
+    // Uncomment to print out XML tree
+    // getRepr()->recursivePrintTree(0);
+    
+    // Uncomment to print out SP Object tree
+    // recursivePrintTree(0);
+    
+    // Uncomment to print out Display Item tree
+    // ai->recursivePrintTree(0);
+
     return ai;
 }
 
diff --git a/src/xml/node.h b/src/xml/node.h
index 8bb70acc0..29cfdab46 100644
--- a/src/xml/node.h
+++ b/src/xml/node.h
@@ -469,6 +469,8 @@ public:
      * @deprecated Use synthesizeEvents(NodeObserver &) instead
      */
     virtual void synthesizeEvents(NodeEventVector const *vector, void *data)=0;
+
+    virtual void recursivePrintTree(unsigned level)=0;
     
     /*@}*/
 
diff --git a/src/xml/simple-node.cpp b/src/xml/simple-node.cpp
index 4965f81c8..3cbedc80b 100644
--- a/src/xml/simple-node.cpp
+++ b/src/xml/simple-node.cpp
@@ -606,6 +606,26 @@ void SimpleNode::synthesizeEvents(NodeObserver &observer) {
     synthesizeEvents(&OBSERVER_EVENT_VECTOR, &observer);
 }
 
+void SimpleNode::recursivePrintTree(unsigned level) {
+
+    if (level == 0) {
+        std::cout << "XML Node Tree" << std::endl;
+    }
+    std::cout << "XML: ";
+    for (unsigned i = 0; i < level; ++i) {
+        std::cout << "  ";
+    }
+    char const *id=attribute("id");
+    if (id) {
+        std::cout << id << std::endl;
+    } else {
+        std::cout << name() << std::endl;
+    }
+    for (SimpleNode *child = _first_child; child != NULL; child = child->_next) {
+        child->recursivePrintTree( level+1 );
+    }
+}
+
 Node *SimpleNode::root() {
     Node *parent=this;
     while (parent->parent()) {
diff --git a/src/xml/simple-node.h b/src/xml/simple-node.h
index 1fcb9193b..d09392249 100644
--- a/src/xml/simple-node.h
+++ b/src/xml/simple-node.h
@@ -19,6 +19,7 @@
 #define SEEN_INKSCAPE_XML_SIMPLE_NODE_H
 
 #include <cassert>
+#include <iostream>
 
 #include "xml/node.h"
 #include "xml/attribute-record.h"
@@ -120,6 +121,8 @@ public:
         _subtree_observers.remove(observer);
     }
 
+    void recursivePrintTree(unsigned level = 0);
+
 protected:
     SimpleNode(int code, Document *document);
     SimpleNode(SimpleNode const &repr, Document *document);