From 5cb1ea4c26a99957adeb9d8213f4842ddea271fb Mon Sep 17 00:00:00 2001
From: Ko van der Sloot <Ko.vanderSloot@ziggo.nl>
Date: Tue, 29 Oct 2024 15:48:41 +0100
Subject: [PATCH] improve debugging

---
 include/libfolia/folia_utils.h |  2 +-
 src/folia_document.cxx         |  2 +-
 src/folia_utils.cxx            | 17 ++++++++++++++++-
 3 files changed, 18 insertions(+), 3 deletions(-)

diff --git a/include/libfolia/folia_utils.h b/include/libfolia/folia_utils.h
index c28a50e..399a6eb 100644
--- a/include/libfolia/folia_utils.h
+++ b/include/libfolia/folia_utils.h
@@ -193,7 +193,7 @@ namespace folia {
   KWargs getArgs( const std::string& );
   std::string toString( const KWargs& );
 
-  void addAttributes( const xmlNode *, const KWargs& );
+  void addAttributes( const xmlNode *, const KWargs&, bool=false );
   KWargs getAttributes( const xmlNode * );
 
   std::string parseDate( const std::string& );
diff --git a/src/folia_document.cxx b/src/folia_document.cxx
index 3a0576e..e1c5b32 100644
--- a/src/folia_document.cxx
+++ b/src/folia_document.cxx
@@ -3235,7 +3235,7 @@ namespace folia {
     if ( debug == SERIALIZE ){
       cerr << "to_xmlDoc: add attributes to root: " << attribs << endl;
     }
-    addAttributes( root, attribs );
+    addAttributes( root, attribs, debug == SERIALIZE );
     xmlNode *md = xmlAddChild( root, TiCC::XmlNewNode( foliaNs(), "metadata" ) );
     add_annotations( md );
     add_provenance( md );
diff --git a/src/folia_utils.cxx b/src/folia_utils.cxx
index b7958cf..7b49529 100644
--- a/src/folia_utils.cxx
+++ b/src/folia_utils.cxx
@@ -416,17 +416,23 @@ namespace folia {
     return atts;
   }
 
-  void addAttributes( const xmlNode *_node, const KWargs& atts ){
+  void addAttributes( const xmlNode *_node,
+		      const KWargs& atts,
+		      bool debug ){
     /// add all attributes from 'atts' as attribute nodes to 'node`
     /*!
       \param _node The xmlNode to add to
       \param atts The list of attribute/value pairs
+      \param debug do we want to debug? (default false)
       some special care is taken for attributes 'xml:id', 'id' and 'lang'
     */
     xmlNode *node = const_cast<xmlNode*>(_node); // strange libxml2 interface
     KWargs attribs = atts;
     auto it = attribs.find("xml:id");
     if ( it != attribs.end() ){ // xml:id is special
+      if ( debug ){
+	cerr << "set xml:id " << it->second << endl;
+      }
       xmlSetProp( node,
 		  XML_XML_ID,
 		  to_xmlChar(it->second) );
@@ -434,12 +440,18 @@ namespace folia {
     }
     it = attribs.find("lang");
     if ( it != attribs.end() ){ // lang is special too
+      if ( debug ){
+	cerr << "set lang " << it->second << endl;
+      }
       xmlNodeSetLang( node,
 		      to_xmlChar(it->second) );
       attribs.erase(it);
     }
     it = attribs.find("id");
     if ( it != attribs.end() ){
+      if ( debug ){
+	cerr << "set id " << it->second << endl;
+      }
       xmlSetProp( node,
 		  to_xmlChar("id"),
 		  to_xmlChar(it->second) );
@@ -447,6 +459,9 @@ namespace folia {
     }
     // and now the rest
     for ( const auto& [at,val] : attribs ){
+      if ( debug ){
+	cerr << "add attribute: [" << at << "," << val << "]" << endl;
+      }
       xmlSetProp( node,
 		  to_xmlChar(at),
 		  to_xmlChar(val) );