X-Git-Url: http://matita.cs.unibo.it/gitweb/?p=helm.git;a=blobdiff_plain;f=helm%2Focaml%2Fxmldiff%2FxmlDiff.ml;fp=helm%2Focaml%2Fxmldiff%2FxmlDiff.ml;h=6f68438e93058dc3b52e235d47c09ce67cfa4704;hp=0000000000000000000000000000000000000000;hb=792b5d29ebae8f917043d9dd226692919b5d6ca1;hpb=a14a8c7637fd0b95e9d4deccb20c6abc98e8f953

diff --git a/helm/ocaml/xmldiff/xmlDiff.ml b/helm/ocaml/xmldiff/xmlDiff.ml
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+++ b/helm/ocaml/xmldiff/xmlDiff.ml
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+(* 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/.
+ *)
+
+(* $Id$ *)
+
+let mathmlns = "http://www.w3.org/1998/Math/MathML";;
+let xmldiffns = "http://helm.cs.unibo.it/XmlDiff";;
+let helmns = "http://www.cs.unibo.it/helm";;
+
+let ds_selection      = Gdome.domString "selection";;
+let ds_2              = Gdome.domString "2";;
+let ds_mathmlns       = Gdome.domString mathmlns;;
+let ds_m_style        = Gdome.domString "m:mstyle";;
+let ds_mathbackground = Gdome.domString "mathbackground";;
+let ds_xmldiffns      = Gdome.domString xmldiffns;;
+let ds_xmldiff_type   = Gdome.domString "xmldiff:type";;
+let ds_fake           = Gdome.domString "fake";;
+let ds_helmns         = Gdome.domString helmns;;
+let ds_xref           = Gdome.domString "xref";;
+let ds_type           = Gdome.domString "type";;
+let ds_yellow         = Gdome.domString "yellow";;
+let ds_green          = Gdome.domString "#00ff00";;
+let ds_maction        = Gdome.domString "maction";;
+let ds_mtr            = Gdome.domString "mtr";;
+let ds_mtd            = Gdome.domString "mtd";;
+
+type highlighted_nodes = Gdome.node list;;
+
+let rec make_visible (n: Gdome.node) =
+ match n#get_parentNode with
+    None -> ()
+  | Some p ->
+     match p#get_namespaceURI, p#get_localName with
+        Some nu, Some ln when
+         nu#equals ds_mathmlns && ln#equals ds_maction ->
+          (new Gdome.element_of_node p)#setAttribute
+            ~name:ds_selection
+             ~value:ds_2 ;
+          make_visible p
+      | _,_ -> make_visible p
+;;
+
+let highlight_node_total_time = ref 0.0;;
+
+let highlight_node ?(color=ds_yellow) (doc: Gdome.document) (n: Gdome.node) =
+ let highlight (n: Gdome.node) =
+  let highlighter =
+   doc#createElementNS
+    ~namespaceURI:(Some ds_mathmlns)
+    ~qualifiedName:ds_m_style
+  in
+   highlighter#setAttribute ~name:ds_mathbackground ~value:color ;
+   highlighter#setAttributeNS
+    ~namespaceURI:(Some ds_xmldiffns)
+    ~qualifiedName:ds_xmldiff_type
+    ~value:ds_fake ;
+   let parent = 
+    match n#get_parentNode with
+       None -> assert false
+     | Some p -> p
+   in
+    ignore
+     (parent#replaceChild ~oldChild:n ~newChild:(highlighter :> Gdome.node)) ;
+    ignore (highlighter#appendChild n) ;
+    (highlighter :> Gdome.node)
+ in
+  let rec find_mstylable_node n =
+   match n#get_namespaceURI, n#get_localName with
+      Some nu, Some ln when
+       nu#equals ds_mathmlns &&
+        (not (ln#equals ds_mtr)) && (not (ln#equals ds_mtd)) -> n
+    | Some nu, Some ln when
+       nu#equals ds_mathmlns &&
+        ln#equals ds_mtr || ln#equals ds_mtd ->
+         let true_child =
+          match n#get_firstChild with
+             None -> assert false
+           | Some n -> n
+         in
+          find_mstylable_node true_child
+    | _,_ ->
+      match n#get_parentNode with
+         None -> assert false
+       | Some p -> find_mstylable_node p
+  in
+   let highlighter = highlight (find_mstylable_node n) in
+    make_visible highlighter ;
+    highlighter
+;;
+
+let iter_children ~f (n:Gdome.node) =
+ let rec aux =
+  function
+     None -> ()
+   | Some n ->
+      let sibling = n#get_nextSibling in
+       (f n) ;
+       aux sibling
+ in
+  aux n#get_firstChild
+;;
+
+let highlight_nodes ~xrefs (doc:Gdome.document) =
+ let highlighted = ref [] in
+ let rec aux (n:Gdome.element) =
+  let attributeNS =
+    (n#getAttributeNS ~namespaceURI:ds_helmns
+     ~localName:ds_xref)#to_string in
+  if List.mem attributeNS xrefs then
+   highlighted :=
+    (highlight_node ~color:ds_green doc (n :> Gdome.node))::
+    !highlighted ;
+   iter_children (n :> Gdome.node)
+    ~f:(function n ->
+         if n#get_nodeType = GdomeNodeTypeT.ELEMENT_NODE then
+          aux (new Gdome.element_of_node n))
+ in
+  aux doc#get_documentElement ;
+  !highlighted
+;;
+
+let dim_nodes =
+ List.iter 
+  (function (n : Gdome.node) ->
+    assert
+     (n#get_nodeType = GdomeNodeTypeT.ELEMENT_NODE &&
+      ((new Gdome.element_of_node n)#getAttributeNS
+        ~namespaceURI:ds_xmldiffns
+        ~localName:ds_type)#equals ds_fake) ;
+    let true_child =
+     match n#get_firstChild with
+        None -> assert false
+      | Some n -> n in
+    let p =
+     match n#get_parentNode with
+        None -> assert false
+      | Some n -> n
+    in
+     ignore (p#replaceChild ~oldChild:n ~newChild:true_child)
+  )
+;;
+
+let update_dom ~(from : Gdome.document) (d : Gdome.document) =
+ let rec aux (p: Gdome.node) (f: Gdome.node) (t: Gdome.node) =
+ let replace t1 =
+  if
+   t1 = GdomeNodeTypeT.ELEMENT_NODE &&
+   ((new Gdome.element_of_node f)#getAttributeNS
+     ~namespaceURI:ds_xmldiffns
+     ~localName:ds_type)#equals ds_fake
+  then
+   let true_child =
+    match f#get_firstChild with
+       None -> assert false
+     | Some n -> n
+   in
+    begin
+     ignore (p#replaceChild ~oldChild:f ~newChild:true_child) ;
+     aux p true_child t
+    end
+  else
+   let t' = from#importNode t true in
+    ignore (p#replaceChild ~newChild:t' ~oldChild:f) ;
+    (* ignore (highlight_node from t') *)
+  in
+  match
+   f#get_nodeType,t#get_nodeType
+  with
+     GdomeNodeTypeT.TEXT_NODE,GdomeNodeTypeT.TEXT_NODE ->
+      (match f#get_nodeValue, t#get_nodeValue with
+          Some v, Some v' when v#equals v' -> ()
+        | Some _, (Some _ as v') -> f#set_nodeValue v'
+        | _,_ -> assert false)
+   | GdomeNodeTypeT.ELEMENT_NODE as t1,GdomeNodeTypeT.ELEMENT_NODE ->
+      (match
+        f#get_namespaceURI,t#get_namespaceURI,f#get_localName,t#get_localName
+       with
+        Some nu, Some nu', Some ln, Some ln' when
+         ln#equals ln' && nu#equals nu' ->
+          begin
+           match f#get_attributes, t#get_attributes with
+              Some fattrs, Some tattrs ->
+               let flen = fattrs#get_length in
+               let tlen = tattrs#get_length in
+                let processed = ref [] in
+                for i = 0 to flen -1 do
+                 match fattrs#item i with
+                    None -> () (* CSC: sigh, togliere un nodo rompe fa decrescere la lunghezza ==> passare a un while *)
+                  | Some attr ->
+                      match attr#get_namespaceURI with
+                         None ->
+                          (* Back to DOM Level 1 ;-( *)
+                          begin
+                           let name = attr#get_nodeName in
+                            match tattrs#getNamedItem ~name with
+                               None ->
+                               ignore (fattrs#removeNamedItem ~name)
+                             | Some attr' ->
+                                processed :=
+                                 (None,Some name)::!processed ;
+                                match attr#get_nodeValue, attr'#get_nodeValue with
+                                   Some v1, Some v2 when
+                                       v1#equals v2
+                                    || (name#equals ds_selection &&
+                                        nu#equals ds_mathmlns &&
+                                        ln#equals ds_maction)
+                                    ->
+                                     ()
+                                 | Some v1, Some v2 ->
+                                    let attr'' = from#importNode attr' true in
+                                     ignore (fattrs#setNamedItem attr'')
+                                 | _,_ -> assert false
+                          end
+                       | Some namespaceURI ->
+                          let localName = 
+                           match attr#get_localName with
+                             Some v -> v
+                            | None -> assert false
+                          in
+                           match
+                            tattrs#getNamedItemNS ~namespaceURI ~localName
+                           with
+                              None ->
+                               ignore
+                                (fattrs#removeNamedItemNS
+                                  ~namespaceURI ~localName)
+                            | Some attr' ->
+                               processed :=
+                                (Some namespaceURI,Some localName)::!processed ;
+                                match attr#get_nodeValue, attr'#get_nodeValue with
+                                   Some v1, Some v2 when
+                                    v1#equals v2 ->
+                                     ()
+                                 | Some _, Some _ ->
+                                    let attr'' = from#importNode attr' true in
+                                     ignore (fattrs#setNamedItem attr'')
+                                 | _,_ -> assert false
+                done ;
+                for i = 0 to tlen -1 do
+                 match tattrs#item i with
+                    None -> assert false
+                  | Some attr ->
+                     let namespaceURI,localName =
+                      match attr#get_namespaceURI with
+                         None ->
+                          None,attr#get_nodeName
+                       | Some namespaceURI as v ->
+                         v, match attr#get_localName with
+                            None -> assert false
+                          | Some v -> v
+                     in
+                      if
+                       not
+                        (List.exists
+                          (function
+                              None,Some localName' ->
+                               (match namespaceURI with
+                                   None ->
+                                    localName#equals localName'
+                                 | Some _ -> false)
+                            | Some namespaceURI', Some localName' ->
+                               (match namespaceURI with
+                                   None -> false
+                                 | Some namespaceURI ->
+                                    localName#equals localName' &&
+                                    namespaceURI#equals namespaceURI'
+                               )
+                            | _,_ -> assert false
+                          ) !processed)
+                      then
+                       let attr' = from#importNode attr false in
+                        ignore (fattrs#setNamedItem attr')
+                done
+            | _,_ -> assert false
+          end ;
+          let rec dumb_diff =
+           function
+              [],[] -> ()
+            | he1::tl1,he2::tl2 ->
+               aux f he1 he2 ;
+               dumb_diff (tl1,tl2)
+            | [],tl2 ->
+               List.iter
+                (function n ->
+                  let n' = from#importNode n true in
+                    ignore (f#appendChild n') ;
+                    (* ignore (highlight_node from n') *)
+		    ()
+                ) tl2
+            | tl1,[] ->
+               List.iter (function n -> ignore (f#removeChild n)) tl1
+          in
+           let node_list_of_nodeList n =
+            let rec aux =
+             function
+                None -> []
+              | Some n when
+                    n#get_nodeType = GdomeNodeTypeT.ELEMENT_NODE
+                 or n#get_nodeType = GdomeNodeTypeT.TEXT_NODE ->
+                  n::(aux n#get_nextSibling)
+              | Some n ->
+                aux n#get_nextSibling
+            in
+             aux n#get_firstChild
+           in
+            dumb_diff
+             (node_list_of_nodeList f, node_list_of_nodeList t)
+      | _,_,_,_ -> replace t1
+      )
+   | t1,t2 when
+      (t1 = GdomeNodeTypeT.ELEMENT_NODE || t1 = GdomeNodeTypeT.TEXT_NODE) &&
+      (t2 = GdomeNodeTypeT.ELEMENT_NODE || t2 = GdomeNodeTypeT.TEXT_NODE) ->
+       replace t1
+   | _,_ -> assert false
+ in
+  try
+   aux (d :> Gdome.node)
+    (from#get_documentElement :> Gdome.node)
+    (d#get_documentElement :> Gdome.node)
+  with
+     (GdomeInit.DOMException (e,msg) as ex) -> raise ex
+  | e -> raise e
+;;