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[helm.git] / components / lexicon / lexiconEngine.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/
+ *)
+
+(* $Id$ *)
+
+let out = ref ignore
+
+let set_callback f = out := f
+
+(* lexicon file name * ma file name *)
+exception IncludedFileNotCompiled of string * string 
+exception MetadataNotFound of string        (* file name *)
+
+type status = {
+  aliases: DisambiguateTypes.environment;         (** disambiguation aliases *)
+  multi_aliases: DisambiguateTypes.multiple_environment;
+  lexicon_content_rev: LexiconMarshal.lexicon;
+  notation_ids: CicNotation.notation_id list;      (** in-scope notation ids *)
+}
+
+let initial_status = {
+  aliases = DisambiguateTypes.Environment.empty;
+  multi_aliases = DisambiguateTypes.Environment.empty;
+  lexicon_content_rev = [];
+  notation_ids = [];
+}
+
+let add_lexicon_content cmds status =
+  let content = status.lexicon_content_rev in
+  let content' =
+    List.fold_right
+     (fun cmd acc -> cmd :: (List.filter ((<>) cmd) acc))
+     cmds content
+  in
+(*   prerr_endline ("new lexicon content: " ^ String.concat " " (List.map
+    LexiconAstPp.pp_command content')); *)
+  { status with lexicon_content_rev = content' }
+
+let set_proof_aliases mode status new_aliases =
+ if mode = LexiconAst.WithoutPreferences then
+   status 
+ else
+   let commands_of_aliases =
+     List.map
+      (fun alias -> LexiconAst.Alias (HExtlib.dummy_floc, alias))
+   in
+   let aliases =
+    List.fold_left (fun acc (d,c) -> DisambiguateTypes.Environment.add d c acc)
+     status.aliases new_aliases in
+   let multi_aliases =
+    List.fold_left (fun acc (d,c) -> DisambiguateTypes.Environment.cons d c acc)
+     status.multi_aliases new_aliases in
+   let new_status =
+     { status with multi_aliases = multi_aliases ; aliases = aliases}
+   in
+   if new_aliases = [] then
+     new_status
+   else
+     let aliases = 
+       DisambiguatePp.aliases_of_domain_and_codomain_items_list new_aliases
+     in
+     let status = 
+       add_lexicon_content (commands_of_aliases aliases) new_status 
+     in
+     status
+
+
+let rec eval_command ?(mode=LexiconAst.WithPreferences) status cmd =
+ !out cmd;
+ let notation_ids' = CicNotation.process_notation cmd in
+ let status =
+   { status with notation_ids = notation_ids' @ status.notation_ids } in
+  match cmd with
+  | LexiconAst.Include (loc, baseuri, mode, fullpath) ->
+     let lexiconpath_rw, lexiconpath_r = 
+       LibraryMisc.lexicon_file_of_baseuri 
+         ~must_exist:false ~writable:true ~baseuri,
+       LibraryMisc.lexicon_file_of_baseuri 
+         ~must_exist:false ~writable:false ~baseuri
+     in
+     let lexiconpath = 
+       if Sys.file_exists lexiconpath_rw then lexiconpath_rw else
+         if Sys.file_exists lexiconpath_r then lexiconpath_r else
+          raise (IncludedFileNotCompiled (lexiconpath_rw,fullpath))
+     in
+     let lexicon = LexiconMarshal.load_lexicon lexiconpath in
+     let status = List.fold_left (eval_command ~mode) status lexicon in
+     status
+  | LexiconAst.Alias (loc, spec) -> 
+     let diff =
+      (*CSC: Warning: this code should be factorized with the corresponding
+             code in DisambiguatePp *)
+      match spec with
+      | LexiconAst.Ident_alias (id,uri) -> 
+         [DisambiguateTypes.Id id,
+          (uri,(fun _ _ _-> CicUtil.term_of_uri(UriManager.uri_of_string uri)))]
+      | LexiconAst.Symbol_alias (symb, instance, desc) ->
+         [DisambiguateTypes.Symbol (symb,instance),
+          DisambiguateChoices.lookup_symbol_by_dsc symb desc]
+      | LexiconAst.Number_alias (instance,desc) ->
+         [DisambiguateTypes.Num instance,
+          DisambiguateChoices.lookup_num_by_dsc desc]
+     in
+      set_proof_aliases mode status diff
+  | LexiconAst.Interpretation (_, dsc, (symbol, _), cic_appl_pattern) as stm ->
+      let status = add_lexicon_content [stm] status in
+      let diff =
+       [DisambiguateTypes.Symbol (symbol, 0),
+         DisambiguateChoices.lookup_symbol_by_dsc symbol dsc]
+      in
+      let status = set_proof_aliases mode status diff in
+      status
+  | LexiconAst.Notation _ as stm -> add_lexicon_content [stm] status
+
+let eval_command = eval_command ?mode:None
+
+let set_proof_aliases  = set_proof_aliases LexiconAst.WithPreferences
+