(* 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/.
 *)

(******************************************************************************)
(*                                                                            *)
(*                               PROJECT HELM                                 *)
(*                                                                            *)
(*                Claudio Sacerdoti Coen <sacerdot@cs.unibo.it>               *)
(*                                 29/01/2003                                 *)
(*                                                                            *)
(*                                                                            *)
(******************************************************************************)

let use_stylesheets = ref false;;(* false performs the transformations in OCaml*)

(* List utility functions *)
exception Skip;;

let list_map_fail f =
 let rec aux =
  function
     [] -> []
   | he::tl ->
      try
       let he' = f he in
        he'::(aux tl)
      with Skip ->
       (aux tl)
 in
  aux
;;
(* End of the list utility functions *)

(** A widget to render sequents **)

class sequent_viewer obj =
 object(self)

  inherit GMathViewAux.multi_selection_math_view obj

  val mutable current_infos = None

  (* returns the list of selected terms         *)
  (* selections which are not terms are ignored *)
  method get_selected_terms =
   let selections = self#get_selections in
    list_map_fail
     (function node ->
       let xpath =
        ((node : Gdome.element)#getAttributeNS
          ~namespaceURI:Misc.helmns
          ~localName:(Gdome.domString "xref"))#to_string
       in
        if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
        else
         match current_infos with
            Some (ids_to_terms,_,_) ->
             let id = xpath in
              (try
                Hashtbl.find ids_to_terms id
               with _ -> raise Skip)
          | None -> assert false (* "ERROR: No current term!!!" *)
     ) selections

  (* returns the list of selected hypotheses         *)
  (* selections which are not hypotheses are ignored *)
  method get_selected_hypotheses =
   let selections = self#get_selections in
    list_map_fail
     (function node ->
       let xpath =
        ((node : Gdome.element)#getAttributeNS
          ~namespaceURI:Misc.helmns
          ~localName:(Gdome.domString "xref"))#to_string
       in
        if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
        else
         match current_infos with
            Some (_,_,ids_to_hypotheses) ->
             let id = xpath in
              (try
                Hashtbl.find ids_to_hypotheses id
               with _ -> raise Skip)
          | None -> assert false (* "ERROR: No current term!!!" *)
     ) selections
  
  method load_sequent metasenv sequent =
   let sequent_mml,(ids_to_terms,ids_to_father_ids,ids_to_hypotheses) =
    ApplyStylesheets.mml_of_cic_sequent metasenv sequent
   in
    self#load_doc ~dom:sequent_mml ;
    current_infos <-
     Some (ids_to_terms,ids_to_father_ids,ids_to_hypotheses)
 end
;;

let sequent_viewer ?adjustmenth ?adjustmentv ?font_size ?font_manager
 ?border_width ?width ?height ?packing ?show () =
 let w =
   GtkMathView.MathView.create
    ?adjustmenth:(Gaux.may_map ~f:GData.as_adjustment adjustmenth)
    ?adjustmentv:(Gaux.may_map ~f:GData.as_adjustment adjustmentv)
    ()
 in
  GtkBase.Container.set w ?border_width ?width ?height;
 let mathview = GObj.pack_return (new sequent_viewer w) ~packing ~show in
 begin
    match font_size with
    | Some size -> mathview#set_font_size size
    | None      -> ()
  end;
  begin
    match font_manager with
    | Some manager -> mathview#set_font_manager_type ~fm_type:manager
    | None         -> ()
  end;
  mathview
;;


(** A widget to render proofs **)

class proof_viewer obj =
 object(self)

  inherit GMathViewAux.single_selection_math_view obj

  initializer self#set_font_size 10

  val mutable current_infos = None
  val mutable current_mml = None

  method make_sequent_of_selected_term =
   match self#get_selection with
      Some node ->
       let xpath =
        ((node : Gdome.element)#getAttributeNS
          ~namespaceURI:Misc.helmns
          ~localName:(Gdome.domString "xref"))#to_string
       in
        if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
        else
         begin
          match current_infos with
             Some (ids_to_terms, ids_to_father_ids, _, _) ->
              let id = xpath in
               LogicalOperations.to_sequent id ids_to_terms ids_to_father_ids
           | None -> assert false (* "ERROR: No current term!!!" *)
         end
    | None -> assert false (* "ERROR: No selection!!!" *)

  method focus_sequent_of_selected_term =
   match self#get_selection with
      Some node ->
       let xpath =
        ((node : Gdome.element)#getAttributeNS
          ~namespaceURI:Misc.helmns
          ~localName:(Gdome.domString "xref"))#to_string
       in
        if xpath = "" then assert false (* "ERROR: No xref found!!!" *)
        else
         begin
          match current_infos with
             Some (ids_to_terms, ids_to_father_ids, _, _) ->
              let id = xpath in
               LogicalOperations.focus id ids_to_terms ids_to_father_ids
           | None -> assert false (* "ERROR: No current term!!!" *)
         end
    | None -> assert false (* "ERROR: No selection!!!" *)

  method load_omdoc_proof uri ~ids_to_inner_sorts cobj =
   if !use_stylesheets then
    let
     (acic,ids_to_terms,ids_to_father_ids,ids_to_inner_sorts,
      ids_to_inner_types,ids_to_conjectures,ids_to_hypotheses)
    =
     Cic2acic.acic_object_of_cic_object (Content2cic.cobj2obj cobj)
    in
     let mml =
      ApplyStylesheets.mml_of_cic_object
       ~explode_all:true uri acic ids_to_inner_sorts ids_to_inner_types
     in
      self#load_doc ~dom:mml ;
      current_mml <- Some mml ;
      current_infos <-
       Some
        (ids_to_terms,ids_to_father_ids,ids_to_conjectures,ids_to_hypotheses) ;
   else
prerr_endline "(******** INIZIO CONTENT ==> PRES **********)";
    let pres = Content2pres.content2pres ~ids_to_inner_sorts cobj in
    let time2 = Sys.time () in
    (* prerr_endline ("Fine trasformazione:" ^ (string_of_float (time2 -. time1))); *)
    let xmlpres = Mpresentation.print_mpres pres in
    let time25 = Sys.time () in
     (*
     prerr_endline ("FINE printing to stream:" ^ (string_of_float (time25 -. time2)));
     Xml.pp xmlpres (Some "tmp");
     let time3 = Sys.time () in
      prerr_endline ("FINE valutazione e printing dello stream:" ^ (string_of_float (time3 -. time25)));
     *)
    (try 
      prerr_endline "(******** INIZIO DOM **********)";
      let mml = Xml2Gdome.document_of_xml Misc.domImpl xmlpres in
      let time3 = Sys.time () in
      (* ignore (Misc.domImpl#saveDocumentToFile mml "tmp1" ()); *)
      prerr_endline "(******** FINE DOM **********)";
      (match current_mml with
          None ->
           self#load_doc ~dom:mml ;
           current_mml <- Some mml
        | Some current_mml ->
           self#freeze ;
prerr_endline "XML_DIFF: prima passata";
(*
ignore (Misc.domImpl#saveDocumentToFile current_mml "/tmp/current_mml_1.xml" ()) ;
ignore (Misc.domImpl#saveDocumentToFile mml "/tmp/mml_1.xml" ()) ;
*)
           XmlDiff.update_dom ~from:current_mml mml ;
(*
prerr_endline "XML_DIFF: seconda passata";
ignore (Misc.domImpl#saveDocumentToFile current_mml "/tmp/current_mml_2.xml" ()) ;
ignore (Misc.domImpl#saveDocumentToFile mml "/tmp/mml_2.xml" ()) ;
           XmlDiff.update_dom ~from:current_mml mml ;
ignore (Misc.domImpl#saveDocumentToFile current_mml "/tmp/current_mml_3.xml" ()) ;
ignore (Misc.domImpl#saveDocumentToFile mml "/tmp/mml_3.xml" ()) ;
*)
prerr_endline "XML_DIFF: fine passate";
           self#thaw) ;
(*
      self#load_doc ~dom:mml;
*)
      prerr_endline ("Fine loading:" ^ (string_of_float (time3 -. time2)))
     (*
      self#load_uri "tmp";
      let time4 = Sys.time () in
      prerr_endline
       ("Fine loading:" ^ (string_of_float (time4 -. time3)))
     *)
    with (GdomeInit.DOMException (_,s)) as e ->
       prerr_endline s; raise e)

  method load_proof uri currentproof =
   let
    (acic,ids_to_terms,ids_to_father_ids,ids_to_inner_sorts,
     ids_to_inner_types,ids_to_conjectures,ids_to_hypotheses)
   =
    Cic2acic.acic_object_of_cic_object currentproof
   in
    let mml =
     ApplyStylesheets.mml_of_cic_object
      ~explode_all:true uri acic ids_to_inner_sorts ids_to_inner_types
    in
     self#load_doc ~dom:mml ;
     current_mml <- Some mml ;
     current_infos <-
      Some
       (ids_to_terms,ids_to_father_ids,ids_to_conjectures,ids_to_hypotheses) ;
    (acic, ids_to_inner_types, ids_to_inner_sorts)
 end
;;

let proof_viewer ?adjustmenth ?adjustmentv ?font_size ?font_manager
 ?border_width ?width ?height ?packing ?show () =
 let w =
   GtkMathView.MathView.create
    ?adjustmenth:(Gaux.may_map ~f:GData.as_adjustment adjustmenth)
    ?adjustmentv:(Gaux.may_map ~f:GData.as_adjustment adjustmentv)
    ()
 in
  GtkBase.Container.set w ?border_width ?width ?height;
 let mathview = GObj.pack_return (new proof_viewer w) ~packing ~show in
 begin
    match font_size with
    | Some size -> mathview#set_font_size size
    | None      -> ()
  end;
  begin
    match font_manager with
    | Some manager -> mathview#set_font_manager_type ~fm_type:manager
    | None         -> ()
  end;
  mathview
;;

let _ =
 Cexpr2pres_hashtbl.init Cexpr2pres.cexpr2pres Cexpr2pres.cexpr2pres_charcount
;;