[gxml] Node.vala: fix check_wrong_document so documents are handled properly

[Richard Hans Schwarting <rschwart src gnome org>]

commit 461b51f5c1396a754c8ebf487c0cacf940591ceb
Author: Richard Schwarting <aquarichy gmail com>
Date:   Tue Sep 24 06:32:25 2013 -0400

    Node.vala: fix check_wrong_document so documents are handled properly

 gxml/Node.vala |   17 ++++++++++++++---
 1 files changed, 14 insertions(+), 3 deletions(-)
---
diff --git a/gxml/Node.vala b/gxml/Node.vala
index 687f9dc..2f42e00 100644
--- a/gxml/Node.vala
+++ b/gxml/Node.vala
@@ -49,8 +49,16 @@ namespace GXml {
                /* Utility methods */
 
                protected void check_wrong_document (Node node) {
-                       if (this.owner_document != node.owner_document) {
-                               GXml.warning (DomException.WRONG_DOCUMENT, "Node tried to interact with this 
document '%p' but belonged to document '%p'".printf (this.owner_document, node.owner_document));
+                       Document this_doc;
+
+                       if (this.node_type == NodeType.DOCUMENT) {
+                               this_doc = (GXml.Document)this;
+                       } else {
+                               this_doc = this.owner_document;
+                       }
+
+                       if (this_doc != node.owner_document) {
+                               GXml.warning (DomException.WRONG_DOCUMENT, "Node tried to interact with this 
document '%p' but belonged to document '%p'".printf (this_doc, node.owner_document));
                        }
                }
 
@@ -329,6 +337,7 @@ namespace GXml {
                public virtual unowned Node? insert_before (Node new_child, Node? ref_child) {
                        return null;
                }
+
                /**
                 * Replaces `old_child` with `new_child` in this node's list of children.
                 *
@@ -340,6 +349,7 @@ namespace GXml {
                public virtual unowned Node? replace_child (Node new_child, Node old_child) {
                        return null;
                }
+
                /**
                 * Removes `old_child` from this node's list of children.
                 *
@@ -351,6 +361,7 @@ namespace GXml {
                public virtual unowned Node? remove_child (Node old_child) {
                        return null;
                }
+
                /**
                 * Appends `new_child` to the end of this node's list of children.
                 *
@@ -362,6 +373,7 @@ namespace GXml {
                public virtual unowned Node? append_child (Node new_child) {
                        return null;
                }
+
                /**
                 * Indicates whether this node has children.
                 *
@@ -408,4 +420,3 @@ namespace GXml {
                }
        }
 }
-