(* 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                                *)
(*                                                                         *)
(*                  29/01/2003 Claudio Sacerdoti Coen                      *)
(*                                                                         *)
(*                                                                         *)
(***************************************************************************)

let debug = false
let debug_print s = if debug then prerr_endline s

type mml_of_cic_sequent =
 Cic.metasenv ->
 int * Cic.context * Cic.term ->
 Gdome.document * 
 (Cic.annconjecture *
  ((Cic.id, Cic.term) Hashtbl.t *
   (Cic.id, Cic.id option) Hashtbl.t *
   (string, Cic.hypothesis) Hashtbl.t *
   (Cic.id, string) Hashtbl.t))
   

type mml_of_cic_object =
  Cic.obj ->
  Gdome.document * 
  (Cic.annobj * 
   ((Cic.id, Cic.term) Hashtbl.t * 
    (Cic.id, Cic.id option) Hashtbl.t *
    (Cic.id, Cic.conjecture) Hashtbl.t * 
    (Cic.id, Cic.hypothesis) Hashtbl.t *
    (Cic.id, string) Hashtbl.t *   
    (Cic.id, Cic2acic.anntypes) Hashtbl.t))
  
(* 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 ~(mml_of_cic_sequent:mml_of_cic_sequent) 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 =
   debug_print (string_of_int (List.length self#get_selections)) ;
   let selections = self#get_selections in
    list_map_fail
     (function node ->
       let xpath =
        ((node : Gdome.element)#getAttributeNS
          ~namespaceURI:Misc.helm_ns
          ~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.helm_ns
          ~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 =
(**** SIAM QUI ****)
   let sequent_mml,(_,(ids_to_terms,ids_to_father_ids,ids_to_hypotheses,ids_to_inner_sorts)) =
     mml_of_cic_sequent metasenv sequent
   in
    self#load_root ~root:sequent_mml#get_documentElement ;
ignore (Misc.domImpl#saveDocumentToFile ~name:"/tmp/pippo" ~doc:sequent_mml ());
     current_infos <-
      Some (ids_to_terms,ids_to_father_ids,ids_to_hypotheses)
 end
;;

let sequent_viewer ~(mml_of_cic_sequent: mml_of_cic_sequent)
  ?hadjustment ?vadjustment ?font_size ?log_verbosity
=
  GtkBase.Widget.size_params ~cont:(
  OgtkMathViewProps.pack_return
    (fun p ->
      OgtkMathViewProps.set_params
        (new sequent_viewer ~mml_of_cic_sequent
          (GtkMathViewProps.MathView_GMetaDOM.create p))
        ~font_size ~log_verbosity)) []
;;

(*
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 ~(mml_of_cic_object:mml_of_cic_object) 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.helm_ns
          ~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.helm_ns
          ~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_proof currentproof =
    let mml,
         (acic,
           (ids_to_terms,ids_to_father_ids,ids_to_conjectures,
            ids_to_hypotheses,ids_to_inner_sorts,ids_to_inner_types)) =
      mml_of_cic_object currentproof
    in
    current_infos <-
      Some
       (ids_to_terms,ids_to_father_ids,ids_to_conjectures,ids_to_hypotheses);
    (* self#load_doc ~dom:mml ;
       current_mml <- Some mml ; *)
    ignore(Misc.domImpl#saveDocumentToFile ~name:"/tmp/prova" ~doc:mml ());
    (match current_mml with
      None ->
        let time1 = Sys.time () in
        self#load_root ~root:mml#get_documentElement ;
        let time2 = Sys.time () in
        debug_print ("Loading and displaying the proof took " ^
          string_of_float (time2 -. time1) ^ "seconds") ;
        current_mml <- Some mml
    | Some current_mml' ->
        self#freeze ;
        let time1 = Sys.time () in
        XmlDiff.update_dom ~from:current_mml' mml ;
        let time2 = Sys.time () in
        debug_print ("XMLDIFF took " ^
          string_of_float (time2 -. time1) ^ "seconds") ;
        self#thaw ;
        let time3 = Sys.time () in
        debug_print ("The refresh of the widget took " ^
          string_of_float (time3 -. time2) ^ "seconds"));
    (acic, ids_to_inner_types, ids_to_inner_sorts)
  end
;;


let proof_viewer ~(mml_of_cic_object: mml_of_cic_object)
  ?hadjustment ?vadjustment ?font_size ?log_verbosity
=
  GtkBase.Widget.size_params ~cont:(
  OgtkMathViewProps.pack_return
    (fun p ->
      OgtkMathViewProps.set_params
        (new proof_viewer ~mml_of_cic_object
          (GtkMathViewProps.MathView_GMetaDOM.create p))
        ~font_size ~log_verbosity)) []
;;

(*
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
;;
*)