Several changes (the beginning of a new era???)

[helm.git] / helm / ocaml / cic_transformations / xml2Gdomexmath.ml

diff --git a/helm/ocaml/cic_transformations/xml2Gdomexmath.ml b/helm/ocaml/cic_transformations/xml2Gdomexmath.ml
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+++ b/helm/ocaml/cic_transformations/xml2Gdomexmath.ml
@@ -0,0 +1,111 @@
+(* Copyright (C) 2000-2002, HELM Team.
+ * 
+ * This file is part of HELM, an Hypertextual, Electronic
+ * Library of Mathematics, developed at the Computer Science
+ * Department, University of Bologna, Italy.
+ * 
+ * HELM is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ * 
+ * HELM is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with HELM; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
+ * MA  02111-1307, USA.
+ * 
+ * For details, see the HELM World-Wide-Web page,
+ * http://cs.unibo.it/helm/.
+ *)
+
+(* cut and paste from xml2Gdome.ml: there was the namespace problem.
+   This is a fst patch: we generate a fixed namespace for math *)
+let document_of_xml (domImplementation : Gdome.domImplementation) strm =
+ let module G = Gdome in
+ let module X = Xml in
+ let namespace = "http://www.w3.org/1998/Math/MathML" in
+  let root_name,root_attributes,root_content =
+   (* 
+   ignore (Stream.next strm) ; (* to skip the <?xml ...?> declaration *)
+   ignore (Stream.next strm) ; (* to skip the DOCTYPE declaration *)
+   *)
+   match Stream.next strm with
+      X.Empty(n,l) -> n,l,[<>]
+    | X.NEmpty(n,l,c) -> n,l,c
+    | _ -> assert false
+  in
+   let document =
+    domImplementation#createDocument ~namespaceURI:(Some (Gdome.domString namespace))
+     ~qualifiedName:(Gdome.domString ("m:" ^ root_name)) ~doctype:None
+   in
+   document#get_documentElement#setAttribute (Gdome.domString "xmlns:m") (Gdome.domString namespace);
+   let rec aux (node : Gdome.node) =
+    parser
+      [< 'X.Str a ; s >] ->
+        let textnode = document#createTextNode ~data:(Gdome.domString a) in
+         ignore (node#appendChild ~newChild:(textnode :> Gdome.node)) ;
+         aux node s
+    | [< 'X.Empty(n,l) ; s >] ->
+        let element = document#createElementNS
+         ~namespaceURI:(Some (Gdome.domString namespace))
+         ~qualifiedName:(Gdome.domString ("m:" ^ n)) in
+         List.iter 
+           (function (n,v) -> 
+            let i = 
+              (try String.index n ':' 
+               with Not_found -> 0) in
+            if i = 0 then
+              element#setAttribute
+              ~name:(Gdome.domString n) ~value:(Gdome.domString v) 
+            else
+              let ns_label = String.sub n 0 i in
+              let ns = 
+                if ns_label = "helm" then "http://www.cs.unibo.it/helm"
+                else if ns_label = "xlink" then "http://www.w3.org/1999/xlink"
+                else assert false in
+              element#setAttributeNS 
+               ~namespaceURI:(Some (Gdome.domString ns))
+               ~qualifiedName:(Gdome.domString n) 
+               ~value:(Gdome.domString v)) l ;
+         ignore
+          (node#appendChild ~newChild:(element : Gdome.element :> Gdome.node)) ;
+         aux node s
+    | [< 'X.NEmpty(n,l,c) ; s >] ->
+        let element = document#createElementNS 
+         ~namespaceURI:(Some (Gdome.domString namespace))
+         ~qualifiedName:(Gdome.domString ("m:" ^ n)) in
+         List.iter
+          (function (n,v) -> 
+            let i = 
+              (try String.index n ':' 
+               with Not_found -> 0) in
+            if i = 0 then
+              element#setAttribute
+              ~name:(Gdome.domString n) ~value:(Gdome.domString v) 
+            else
+              let ns_label = String.sub n 0 i in
+              let ns = 
+                if ns_label = "helm" then "http://www.cs.unibo.it/helm"
+                else if ns_label = "xlink" then "http://www.w3.org/1999/xlink"
+                else assert false in
+              element#setAttributeNS 
+               ~namespaceURI:(Some (Gdome.domString ns))
+               ~qualifiedName:(Gdome.domString n) 
+               ~value:(Gdome.domString v)) l ;
+         ignore (node#appendChild ~newChild:(element :> Gdome.node)) ;
+         aux (element :> Gdome.node) c ;
+         aux node s
+    | [< >] -> ()
+   in
+    let root = document#get_documentElement in
+     List.iter (function (n,v) -> root#setAttribute
+      ~name:(Gdome.domString n) ~value:(Gdome.domString v)) root_attributes ;
+     aux (root : Gdome.element :> Gdome.node) root_content ;
+     document
+;;
+