test branch

[helm.git] / helm / ocaml / grafite_engine / grafiteSync.ml

diff --git a/helm/ocaml/grafite_engine/grafiteSync.ml b/helm/ocaml/grafite_engine/grafiteSync.ml
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+(* Copyright (C) 2004-2005, 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://helm.cs.unibo.it/
+ *)
+
+(* $Id$ *)
+
+open Printf
+
+let add_obj ~basedir uri obj status =
+ let lemmas = LibrarySync.add_obj uri obj basedir in
+  {status with GrafiteTypes.objects = uri::status.GrafiteTypes.objects},
+   lemmas
+
+let add_coercion ~basedir ~add_composites status uri =
+ let compounds = LibrarySync.add_coercion ~add_composites ~basedir uri in
+  {status with GrafiteTypes.coercions = uri :: status.GrafiteTypes.coercions},
+   compounds
+ 
+module OrderedUri =
+struct
+  type t = UriManager.uri * string
+  let compare (u1, _) (u2, _) = UriManager.compare u1 u2
+end
+
+module UriSet = Set.Make (OrderedUri)
+
+  (** @return l2 \ l1 *)
+let uri_list_diff l2 l1 =
+  let module S = UriManager.UriSet in
+  let s1 = List.fold_left (fun set uri -> S.add uri set) S.empty l1 in
+  let s2 = List.fold_left (fun set uri -> S.add uri set) S.empty l2 in
+  let diff = S.diff s2 s1 in
+  S.fold (fun uri uris -> uri :: uris) diff []
+
+let time_travel ~present ~past =
+  let objs_to_remove =
+   uri_list_diff present.GrafiteTypes.objects past.GrafiteTypes.objects in
+  let coercions_to_remove =
+   uri_list_diff present.GrafiteTypes.coercions past.GrafiteTypes.coercions
+  in
+   List.iter (fun uri -> LibrarySync.remove_coercion uri) coercions_to_remove;
+   List.iter LibrarySync.remove_obj objs_to_remove
+
+let init () =
+  LibrarySync.remove_all_coercions ();
+  LibraryObjects.reset_defaults ();
+  {
+    GrafiteTypes.moo_content_rev = [];
+    proof_status = GrafiteTypes.No_proof;
+    options = GrafiteTypes.no_options;
+    objects = [];
+    coercions = [];
+  }