[gxml: 12/18] Document.vala, libxml-2.0.vapi: free xmlDoc and Element xmlNode structures; maintain a list of GXml-

[Richard Hans Schwarting <rschwart src gnome org>]

commit e7b2758c304fb8a1513d2caac66e937b4393d8b3
Author: Richard Schwarting <aquarichy gmail com>
Date:   Sun Jun 9 18:23:29 2013 -0400

    Document.vala, libxml-2.0.vapi: free xmlDoc and Element xmlNode structures; maintain a list of 
GXml-created nodes that might not be in the tree for this.

 gxml/Document.vala   |   23 +++++++++++++++++++++++
 vapi/libxml-2.0.vapi |    6 ++++++
 2 files changed, 29 insertions(+), 0 deletions(-)
---
diff --git a/gxml/Document.vala b/gxml/Document.vala
index 649ade6..e78fd6b 100644
--- a/gxml/Document.vala
+++ b/gxml/Document.vala
@@ -181,6 +181,28 @@ namespace GXml {
                        }
                }
 
+               List<Xml.Node*> new_nodes = new List<Xml.Node*> ();
+
+               ~Document () {
+                       List<Xml.Node*> to_free = new List<Xml.Node*> ();
+
+                       /* we use two separate loops, because freeing
+                          a node frees its descendants, and we might
+                          have a branch with children that might be
+                          visited after their root ancestor
+                       */
+                       foreach (Xml.Node *new_node in new_nodes) {
+                               if (new_node->parent == null) {
+                                       to_free.append (new_node);
+                               }
+                       }
+                       foreach (Xml.Node *freeable in to_free) {
+                               freeable->free ();
+                       }
+
+                       this.xmldoc->free ();
+               }
+
                /** Constructor */
                /**
                 * Creates a Document based on a libxml2 Xml.Doc* object.
@@ -420,6 +442,7 @@ namespace GXml {
                        Element new_elem;
 
                        xmlelem = this.xmldoc->new_node (null, tag_name, null);
+                       this.new_nodes.append (xmlelem);
                        new_elem = new Element (xmlelem, this);
                        return new_elem;
                }
diff --git a/vapi/libxml-2.0.vapi b/vapi/libxml-2.0.vapi
index b7269cb..6743b1c 100644
--- a/vapi/libxml-2.0.vapi
+++ b/vapi/libxml-2.0.vapi
@@ -393,6 +393,9 @@ namespace Xml {
                [CCode (cname = "xmlElemDump", instance_pos = 1.1)]
                public void elem_dump (GLib.FileStream f, Node* cur);
 
+               [CCode (cname = "xmlFreeDoc")]
+               public void free ();
+
                [CCode (cname = "xmlGetDocCompressMode")]
                public int get_compress_mode ();
 
@@ -685,6 +688,9 @@ namespace Xml {
                [CCode (cname = "xmlFreeNodeList")]
                public void free_list ();
 
+               [CCode (cname = "xmlFreeNode")]
+               public void free ();
+
                [CCode (cname = "xmlGetLastChild")]
                public Node* get_last_child ();