(* 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>               *)
(*                                 30/01/2003                                 *)
(*                                                                            *)
(*                                                                            *)
(******************************************************************************)

exception RefreshSequentException of exn
exception RefreshProofException of exn

module type Callbacks =
  sig
    (* input widgets *)
    val sequent_viewer : unit -> TermViewer.sequent_viewer
    val term_editor : unit -> TermEditor.term_editor
    val scratch_window :
     unit ->
      < sequent_viewer: TermViewer.sequent_viewer ;
        show: unit -> unit ;
        term: Cic.term ;
        set_term : Cic.term -> unit ;
        metasenv: Cic.metasenv ;
        set_metasenv : Cic.metasenv -> unit ;
        context: Cic.context ;
        set_context : Cic.context -> unit >
    (* GUI refresh functions *)
    val refresh_proof : unit -> unit
    val refresh_goals : unit -> unit
    (* callbacks for user-tactics interaction *)
    val decompose_uris_choice_callback :
      (UriManager.uri * int * 'a) list ->
      (UriManager.uri * int * 'b list) list
    val mk_fresh_name_callback : ProofEngineTypes.mk_fresh_name_type
    val mqi_handle : MQIConn.handle
    val dbh : Dbi.connection
  end

module type Tactics =
 sig
   val intros : unit -> unit
   val exact : ?term:string -> unit -> unit
   val apply : ?term:string -> unit -> unit
   val elimintrossimpl : ?term:string -> unit -> unit
   val elimtype : ?term:string -> unit -> unit
   val whd : unit -> unit
   val reduce : unit -> unit
   val simpl : unit -> unit
   val fold_whd : ?term:string -> unit -> unit
   val fold_reduce : ?term:string -> unit -> unit
   val fold_simpl : ?term:string -> unit -> unit
   val cut : ?term:string -> unit -> unit
   val change : unit -> unit
   val letin : ?term:string -> unit -> unit
   val ring : unit -> unit
   val clearbody : unit -> unit
   val clear : unit -> unit
   val fourier : unit -> unit
   val rewritesimpl : ?term:string -> unit -> unit
   val rewritebacksimpl : ?term:string -> unit -> unit
   val replace : unit -> unit
   val reflexivity : unit -> unit
   val symmetry : unit -> unit
   val transitivity : ?term:string -> unit -> unit
   val exists : unit -> unit
   val split : unit -> unit
   val left : unit -> unit
   val right : unit -> unit
   val assumption : unit -> unit
   val generalize : unit -> unit
   val absurd : ?term:string -> unit -> unit
   val contradiction : unit -> unit
   val decompose : ?term:string -> unit -> unit
   val injection : ?term:string -> unit -> unit
   val discriminate : ?term:string -> unit -> unit
   val whd_in_scratch : unit -> unit
   val reduce_in_scratch : unit -> unit
   val simpl_in_scratch : unit -> unit
   val auto : unit -> unit  
 end

module Make (C : Callbacks) : Tactics