diff -u /tmp/gtkmathview-0.2.4/src/MathEngine.cc src/MathEngine.cc
--- /tmp/gtkmathview-0.2.4/src/MathEngine.cc	Mon Mar 19 07:48:47 2001
+++ src/MathEngine.cc	Sun May 13 12:25:54 2001
@@ -140,6 +140,37 @@
 }
 
 bool
+MathEngine::Load(mDOMDocRef d)
+{
+  assert(d != NULL);
+
+  Clock perf;
+  perf.Start();
+  MathMLParser *parser = new MathMLParser(d);
+  document = parser->Parse();
+  perf.Stop();
+  logger(LOG_INFO, "parsing time: %dms", perf());
+  delete parser;
+
+  if (document != NULL) {
+    perf.Start();
+    document->Normalize();
+    perf.Stop();
+    logger(LOG_INFO, "normalization time: %dms", perf());
+    
+    root = document->GetRoot();
+    assert(root != NULL);
+
+    Setup();
+
+    return true;
+  } else
+    logger(LOG_WARNING, "error while parsing document 0x%x", d);
+
+  return false;
+}
+
+bool
 MathEngine::Load(const char* fileName)
 {
   assert(fileName != NULL);
diff -u /tmp/gtkmathview-0.2.4/src/MathEngine.hh src/MathEngine.hh
--- /tmp/gtkmathview-0.2.4/src/MathEngine.hh	Wed Dec 13 12:18:40 2000
+++ src/MathEngine.hh	Sun May 13 12:21:23 2001
@@ -40,6 +40,7 @@
   void  Init(class DrawingArea*, class FontManager*);
 
   bool  Load(const char*);
+  bool  Load(mDOMDocRef);
   void  Unload(void);
 
   void  Setup(void);
diff -u /tmp/gtkmathview-0.2.4/src/Parser.cc src/Parser.cc
--- /tmp/gtkmathview-0.2.4/src/Parser.cc	Tue Nov  7 05:01:47 2000
+++ src/Parser.cc	Sun May 13 12:16:36 2001
@@ -41,6 +41,12 @@
   doc = NULL;
 }
 
+MathMLParser::MathMLParser(mDOMDocRef tree)
+{
+  fileName = NULL;
+  doc = tree ;
+}
+
 MathMLParser::~MathMLParser()
 {
 }
@@ -48,7 +54,9 @@
 MathMLDocument*
 MathMLParser::Parse()
 {
-  doc = MathMLParseFile(fileName, false);
+  if ( fileName && !doc )
+    doc = MathMLParseFile(fileName, false);
+
   if (doc == NULL) return NULL;
 
   MathMLDocument* document = new MathMLDocument(doc);
diff -u /tmp/gtkmathview-0.2.4/src/Parser.hh src/Parser.hh
--- /tmp/gtkmathview-0.2.4/src/Parser.hh	Tue Nov  7 05:01:48 2000
+++ src/Parser.hh	Sun May 13 12:16:21 2001
@@ -33,6 +33,7 @@
 class MathMLParser {
 public:
   MathMLParser(const char*);
+  MathMLParser(mDOMDocRef);
   ~MathMLParser();
 
   class MathMLDocument* Parse(void);
diff -u /tmp/gtkmathview-0.2.4/src/gtkmathview.cc src/gtkmathview.cc
--- /tmp/gtkmathview-0.2.4/src/gtkmathview.cc	Wed Dec 13 12:18:40 2000
+++ src/gtkmathview.cc	Sun May 13 12:23:32 2001
@@ -707,6 +707,26 @@
 }
 
 extern "C" gboolean
+gtk_math_view_load_tree(GtkMathView* math_view, mDOMDocRef d)
+{
+  g_return_val_if_fail(math_view != NULL, FALSE);
+  g_return_val_if_fail(math_view->area != NULL, FALSE);
+  g_return_val_if_fail(d != NULL, FALSE);
+  g_return_val_if_fail(math_view->interface != NULL, FALSE);
+
+  bool res = math_view->interface->Load(d);
+  if (!res) return FALSE;
+
+  math_view->interface->Layout();
+
+  setup_adjustments(math_view);
+
+  paint_widget(math_view);
+
+  return TRUE;
+}
+
+extern "C" gboolean
 gtk_math_view_load(GtkMathView* math_view, const gchar* name)
 {
   g_return_val_if_fail(math_view != NULL, FALSE);
diff -u /tmp/gtkmathview-0.2.4/src/gtkmathview.h src/gtkmathview.h
--- /tmp/gtkmathview-0.2.4/src/gtkmathview.h	Wed Jan 10 05:28:41 2001
+++ src/gtkmathview.h	Sun May 13 12:24:48 2001
@@ -101,6 +101,7 @@
   GtkType    	 gtk_math_view_get_type(void);
   GtkWidget* 	 gtk_math_view_new(GtkAdjustment*, GtkAdjustment*);
   gboolean     	 gtk_math_view_load(GtkMathView*, const gchar*);
+  gboolean	 gtk_math_view_load_tree(GtkMathView*, mDOMDocRef);
   void           gtk_math_view_unload(GtkMathView*);
   mDOMNodeRef    gtk_math_view_get_selection(GtkMathView*);
   void           gtk_math_view_set_selection(GtkMathView*, mDOMNodeRef);