+(* 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> *)
+(* 06/01/2002 *)
+(* *)
+(* *)
+(******************************************************************************)
+
+(* A WIDGET TO ENTER CIC TERMS *)
+
+class type term_editor =
+ object
+ method coerce : GObj.widget
+ method get_as_string : string
+ method get_metasenv_and_term :
+ context:Cic.context ->
+ metasenv:Cic.metasenv -> Cic.metasenv * Cic.term
+ method reset : unit
+ method set_term : string -> unit
+ method id_to_uris : Disambiguate.domain_and_interpretation ref
+ end
+;;
+
+let empty_id_to_uris = ([],function _ -> None);;
+
+module Make(C:Disambiguate.Callbacks) =
+ struct
+
+ module Disambiguate' = Disambiguate.Make(C);;
+
+ class term_editor_impl ?packing ?width ?height ?isnotempty_callback
+ ?share_id_to_uris_with () : term_editor
+ =
+ let id_to_uris =
+ match share_id_to_uris_with with
+ None -> ref empty_id_to_uris
+ | Some obj -> obj#id_to_uris
+ in
+ let input = GEdit.text ~editable:true ?width ?height ?packing () in
+ let _ =
+ match isnotempty_callback with
+ None -> ()
+ | Some callback ->
+ ignore(input#connect#changed
+ (function () -> callback (input#length > 0)))
+ in
+ object(self)
+ method coerce = input#coerce
+ method reset =
+ input#delete_text 0 input#length
+ (* CSC: txt is now a string, but should be of type Cic.term *)
+ method set_term txt =
+ self#reset ;
+ ignore ((input#insert_text txt) ~pos:0)
+ (* CSC: this method should disappear *)
+ method get_as_string =
+ input#get_chars 0 input#length
+ method get_metasenv_and_term ~context ~metasenv =
+ let name_context =
+ List.map
+ (function
+ Some (n,_) -> Some n
+ | None -> None
+ ) context
+ in
+ let lexbuf = Lexing.from_string (input#get_chars 0 input#length) in
+ let dom,mk_metasenv_and_expr =
+ CicTextualParserContext.main
+ ~context:name_context ~metasenv CicTextualLexer.token lexbuf
+ in
+ let id_to_uris',metasenv,expr =
+ Disambiguate'.disambiguate_input
+ context metasenv dom mk_metasenv_and_expr ~id_to_uris:!id_to_uris
+ in
+ id_to_uris := id_to_uris' ;
+ metasenv,expr
+ method id_to_uris = id_to_uris
+ end
+
+ let term_editor = new term_editor_impl
+
+end
+;;