1 (* Copyright (C) 2004-2005, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
12 * HELM is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://helm.cs.unibo.it/
31 module TA = GrafiteAst
34 let debug_print = if debug then prerr_endline else ignore
36 (** raised when one of the script margins (top or bottom) is reached *)
38 exception NoUnfinishedProof
39 exception ActionCancelled of string
41 let safe_substring s i j =
42 try String.sub s i j with Invalid_argument _ -> assert false
44 let heading_nl_RE = Pcre.regexp "^\\s*\n\\s*"
45 let heading_nl_RE' = Pcre.regexp "^(\\s*\n\\s*)"
46 let only_dust_RE = Pcre.regexp "^(\\s|\n|%%[^\n]*\n)*$"
47 let multiline_RE = Pcre.regexp "^\n[^\n]+$"
48 let newline_RE = Pcre.regexp "\n"
49 let comment_RE = Pcre.regexp "\\(\\*(.|\n)*\\*\\)\n?" ~flags:[`UNGREEDY]
52 if Pcre.pmatch ~rex:multiline_RE str then
53 "\n(** " ^ (Pcre.replace ~rex:newline_RE str) ^ " *)"
55 "\n(**\n" ^ str ^ "\n*)"
57 let strip_comments str =
58 Pcre.qreplace ~templ:"\n" ~pat:"\n\n" (Pcre.qreplace ~rex:comment_RE str)
62 let s = Pcre.replace ~rex:heading_nl_RE s in
64 let nl_pos = String.index s '\n' in
69 mathviewer:MatitaTypes.mathViewer;
70 urichooser: NReference.reference list -> NReference.reference list;
71 ask_confirmation: title:string -> message:string -> [`YES | `NO | `CANCEL];
74 let eval_with_engine include_paths guistuff grafite_status user_goal
75 skipped_txt nonskipped_txt st
77 let parsed_text_length =
78 String.length skipped_txt + String.length nonskipped_txt
80 let text = skipped_txt ^ nonskipped_txt in
81 let prefix_len = MatitaGtkMisc.utf8_string_length skipped_txt in
82 let enriched_history_fragment =
83 MatitaEngine.eval_ast ~include_paths ~do_heavy_checks:(Helm_registry.get_bool
84 "matita.do_heavy_checks")
85 grafite_status (text,prefix_len,st)
87 let enriched_history_fragment = List.rev enriched_history_fragment in
91 (fun (acc, to_prepend) (status,alias) ->
93 | None -> (status,to_prepend ^ nonskipped_txt)::acc,""
95 let newtxt = GrafiteAstPp.pp_alias value in
96 (status,to_prepend ^ newtxt ^ "\n")::acc, "")
97 ([],skipped_txt) enriched_history_fragment
99 res,"",parsed_text_length
102 (* this function calls the parser in a way that it does not perform inclusions,
103 * so that we can ensure the inclusion is performed after the included file
104 * is compiled (if needed). matitac does not need that, since it compiles files
105 * in the good order, here files may be compiled on demand. *)
106 let wrap_with_make include_paths f x =
108 (GrafiteAst.Executable
109 (_,GrafiteAst.NCommand (_,GrafiteAst.Include (_,_,mafilename)))) as cmd
111 let root, buri, _, tgt =
112 try Librarian.baseuri_of_script ~include_paths mafilename
113 with Librarian.NoRootFor _ ->
114 HLog.error ("The included file '"^mafilename^"' has no root file,");
115 HLog.error "please create it.";
116 raise (Failure ("No root file for "^mafilename))
118 if MatitacLib.Make.make root [tgt] then
120 else raise (Failure ("Compiling: " ^ tgt))
124 let pp_eager_statement_ast = GrafiteAstPp.pp_statement
126 let eval_nmacro include_paths (buffer : GText.buffer) guistuff grafite_status user_goal unparsed_text parsed_text script mac =
127 let parsed_text_length = String.length parsed_text in
129 | TA.Screenshot (_,name) ->
130 let status = script#grafite_status in
131 let _,_,menv,subst,_ = status#obj in
132 let name = Filename.dirname (script#filename) ^ "/" ^ name in
134 let selected = Continuationals.Stack.head_goals status#stack in
135 List.filter (fun x,_ -> List.mem x selected) menv
137 guistuff.mathviewer#screenshot status sequents menv subst name;
138 [status, parsed_text], "", parsed_text_length
140 let status = script#grafite_status in
141 let _,_,menv,subst,_ = status#obj in
143 try let _,(_,ctx,_) = List.hd menv in ctx
144 with Failure "hd" -> []
146 let m, s, status, t =
147 GrafiteDisambiguate.disambiguate_nterm
148 status None ctx menv subst (parsed_text,parsed_text_length,
149 NotationPt.Cast (t,NotationPt.Implicit `JustOne))
150 (* XXX use the metasenv, if possible *)
152 guistuff.mathviewer#show_entry (`NCic (t,ctx,m,s));
153 [status, parsed_text], "", parsed_text_length
154 | TA.NIntroGuess _loc ->
155 let names_ref = ref [] in
157 NTactics.intros_tac ~names_ref [] script#grafite_status
159 let rex = Pcre.regexp ~flags:[`MULTILINE] "\\A([\\n\\t\\r ]*).*\\Z" in
160 let nl = Pcre.replace ~rex ~templ:"$1" parsed_text in
161 [s, nl ^ "#" ^ String.concat " " !names_ref ^ ";"], "", parsed_text_length
162 | TA.NAutoInteractive (_loc, (None,a)) ->
163 let trace_ref = ref [] in
166 ~params:(None,a) ~trace_ref script#grafite_status
169 try List.assoc "depth" a
172 let trace = "/"^(if int_of_string depth > 1 then depth else "")^"/ by " in
174 match !trace_ref with
178 (HExtlib.filter_map (function
179 | NotationPt.NRef r -> Some (NCicPp.r2s true r)
183 let rex = Pcre.regexp ~flags:[`MULTILINE] "\\A([\\n\\t\\r ]*).*\\Z" in
184 let nl = Pcre.replace ~rex ~templ:"$1" parsed_text in
185 [s, nl ^ trace ^ thms ^ ";"], "", parsed_text_length
186 | TA.NAutoInteractive (_, (Some _,_)) -> assert false
188 let rec eval_executable include_paths (buffer : GText.buffer) guistuff
189 grafite_status user_goal unparsed_text skipped_txt nonskipped_txt
193 ignore (buffer#move_mark (`NAME "beginning_of_statement")
194 ~where:((buffer#get_iter_at_mark (`NAME "locked"))#forward_chars
195 (Glib.Utf8.length skipped_txt))) ;
196 eval_with_engine include_paths
197 guistuff grafite_status user_goal skipped_txt nonskipped_txt
198 (TA.Executable (loc, ex))
200 MatitaTypes.Cancel -> [], "", 0
201 | GrafiteEngine.NMacro (_loc,macro) ->
202 eval_nmacro include_paths buffer guistuff grafite_status
203 user_goal unparsed_text (skipped_txt ^ nonskipped_txt) script macro
206 and eval_statement include_paths (buffer : GText.buffer) guistuff
207 grafite_status user_goal script statement
209 let st,unparsed_text =
212 if Pcre.pmatch ~rex:only_dust_RE text then raise Margin;
214 wrap_with_make include_paths
215 (GrafiteParser.parse_statement grafite_status)
216 (Ulexing.from_utf8_string text)
219 | `Ast (st, text) -> st, text
221 let text_of_loc floc =
222 let nonskipped_txt,_ = MatitaGtkMisc.utf8_parsed_text unparsed_text floc in
223 let start, stop = HExtlib.loc_of_floc floc in
224 let floc = HExtlib.floc_of_loc (0, start) in
225 let skipped_txt,_ = MatitaGtkMisc.utf8_parsed_text unparsed_text floc in
226 let floc = HExtlib.floc_of_loc (0, stop) in
227 let txt,len = MatitaGtkMisc.utf8_parsed_text unparsed_text floc in
228 txt,nonskipped_txt,skipped_txt,len
231 | GrafiteAst.Executable (loc, ex) ->
232 let _, nonskipped, skipped, parsed_text_length = text_of_loc loc in
233 eval_executable include_paths buffer guistuff
234 grafite_status user_goal unparsed_text skipped nonskipped script ex loc
235 | GrafiteAst.Comment (loc, GrafiteAst.Code (_, ex))
236 when Helm_registry.get_bool "matita.execcomments" ->
237 let _, nonskipped, skipped, parsed_text_length = text_of_loc loc in
238 eval_executable include_paths buffer guistuff
239 grafite_status user_goal unparsed_text skipped nonskipped script ex loc
240 | GrafiteAst.Comment (loc, _) ->
241 let parsed_text, _, _, parsed_text_length = text_of_loc loc in
242 let remain_len = String.length unparsed_text - parsed_text_length in
243 let s = String.sub unparsed_text parsed_text_length remain_len in
246 eval_statement include_paths buffer guistuff
247 grafite_status user_goal script (`Raw s)
249 HExtlib.Localized (floc, exn) ->
250 HExtlib.raise_localized_exception
251 ~offset:(MatitaGtkMisc.utf8_string_length parsed_text) floc exn
252 | MultiPassDisambiguator.DisambiguationError (offset,errorll) ->
254 (MultiPassDisambiguator.DisambiguationError
255 (offset+parsed_text_length, errorll))
257 assert (text=""); (* no macros inside comments, please! *)
259 | (statuses,text)::tl ->
260 (statuses,parsed_text ^ text)::tl,"",parsed_text_length + len
263 let fresh_script_id =
267 class script ~(source_view: GSourceView2.source_view)
268 ~(mathviewer: MatitaTypes.mathViewer)
273 let buffer = source_view#buffer in
274 let source_buffer = source_view#source_buffer in
275 let initial_statuses current baseuri =
276 let empty_lstatus = new GrafiteDisambiguate.status in
279 NCicLibrary.time_travel
280 ((new GrafiteTypes.status current#baseuri)#set_disambiguate_db current#disambiguate_db);
281 (* CSC: there is a known bug in invalidation; temporary fix here *)
282 NCicEnvironment.invalidate ()
284 let lexicon_status = empty_lstatus in
285 let grafite_status = (new GrafiteTypes.status baseuri)#set_disambiguate_db lexicon_status#disambiguate_db in
288 let read_include_paths file =
290 let root, _buri, _fname, _tgt =
291 Librarian.baseuri_of_script ~include_paths:[] file
294 Str.split (Str.regexp " ")
295 (List.assoc "include_paths" (Librarian.load_root_file (root^"/root")))
297 List.iter (HLog.debug) rc; rc
298 with Librarian.NoRootFor _ | Not_found -> []
300 let default_buri = "cic:/matita/tests" in
301 let default_fname = ".unnamed.ma" in
303 val mutable include_paths_ = []
305 val scriptId = fresh_script_id ()
308 mathviewer = mathviewer;
309 urichooser = urichooser;
310 ask_confirmation = ask_confirmation;
313 val mutable filename_ = (None : string option)
315 method has_name = filename_ <> None
317 method include_paths =
319 Helm_registry.get_list Helm_registry.string "matita.includes"
321 method private curdir =
323 let root, _buri, _fname, _tgt =
324 Librarian.baseuri_of_script ~include_paths:self#include_paths
328 with Librarian.NoRootFor _ -> Sys.getcwd ()
330 method buri_of_current_file =
332 | None -> default_buri
335 let _root, buri, _fname, _tgt =
336 Librarian.baseuri_of_script ~include_paths:self#include_paths f
339 with Librarian.NoRootFor _ -> default_buri
341 method filename = match filename_ with None -> default_fname | Some f -> f
344 ignore (GMain.Timeout.add ~ms:300000
345 ~callback:(fun _ -> self#_saveToBackupFile ();true));
346 ignore (buffer#connect#modified_changed
347 (fun _ -> set_star buffer#modified))
349 val mutable statements = [] (** executed statements *)
351 val mutable history = [ initial_statuses None default_buri ]
352 (** list of states before having executed statements. Head element of this
353 * list is the current state, last element is the state at the beginning of
355 * Invariant: this list length is 1 + length of statements *)
357 (** goal as seen by the user (i.e. metano corresponding to current tab) *)
358 val mutable userGoal = (None : int option)
360 (** text mark and tag representing locked part of a script *)
362 buffer#create_mark ~name:"locked" ~left_gravity:true buffer#start_iter
363 val beginning_of_statement_mark =
364 buffer#create_mark ~name:"beginning_of_statement"
365 ~left_gravity:true buffer#start_iter
366 val locked_tag = buffer#create_tag [`BACKGROUND "lightblue"; `EDITABLE false]
367 val error_tag = buffer#create_tag [`UNDERLINE `SINGLE; `FOREGROUND "red"]
369 method locked_mark = locked_mark
370 method locked_tag = locked_tag
371 method error_tag = error_tag
373 (* history can't be empty, the invariant above grant that it contains at
374 * least the init grafite_status *)
375 method grafite_status = match history with s::_ -> s | _ -> assert false
377 method private _advance ?statement () =
378 let s = match statement with Some s -> s | None -> self#getFuture in
379 if self#bos then LibraryClean.clean_baseuris [self#buri_of_current_file];
380 HLog.debug ("evaluating: " ^ first_line s ^ " ...");
381 let time1 = Unix.gettimeofday () in
382 let entries, newtext, parsed_len =
384 eval_statement self#include_paths buffer guistuff
385 self#grafite_status userGoal self (`Raw s)
386 with End_of_file -> raise Margin
388 let time2 = Unix.gettimeofday () in
389 HLog.debug ("... done in " ^ string_of_float (time2 -. time1) ^ "s");
390 let new_statuses, new_statements =
391 let statuses, texts = List.split entries in
394 history <- new_statuses @ history;
395 statements <- new_statements @ statements;
396 let start = buffer#get_iter_at_mark (`MARK locked_mark) in
397 let new_text = String.concat "" (List.rev new_statements) in
398 if statement <> None then
399 buffer#insert ~iter:start new_text
401 let parsed_text = String.sub s 0 parsed_len in
402 if new_text <> parsed_text then begin
403 let stop = start#copy#forward_chars (Glib.Utf8.length parsed_text) in
404 buffer#delete ~start ~stop;
405 buffer#insert ~iter:start new_text;
408 self#moveMark (Glib.Utf8.length new_text);
409 buffer#insert ~iter:(buffer#get_iter_at_mark (`MARK locked_mark)) newtext;
410 (* here we need to set the Goal in case we are going to cursor (or to
411 bottom) and we will face a macro *)
414 method private _retract offset grafite_status new_statements new_history =
415 NCicLibrary.time_travel grafite_status;
416 statements <- new_statements;
417 history <- new_history;
418 self#moveMark (- offset)
420 method advance ?statement () =
422 self#_advance ?statement ();
425 | Margin -> self#notify
426 | Not_found -> assert false
427 | Invalid_argument "Array.make" -> HLog.error "The script is too big!\n"
428 | exc -> self#notify; raise exc
432 let cmp,new_statements,new_history,grafite_status =
433 match statements,history with
434 stat::statements, _::(status::_ as history) ->
435 assert (Glib.Utf8.validate stat);
436 Glib.Utf8.length stat, statements, history, status
437 | [],[_] -> raise Margin
438 | _,_ -> assert false
440 self#_retract cmp grafite_status new_statements
444 | Margin -> self#notify
445 | Invalid_argument "Array.make" -> HLog.error "The script is too big!\n"
446 | exc -> self#notify; raise exc
448 method private getFuture =
449 let lock = buffer#get_iter_at_mark (`MARK locked_mark) in
450 let text = buffer#get_text ~start:lock ~stop:buffer#end_iter () in
453 method expandAllVirtuals =
454 let lock = buffer#get_iter_at_mark (`MARK locked_mark) in
455 let text = buffer#get_text ~start:lock ~stop:buffer#end_iter () in
456 buffer#delete ~start:lock ~stop:buffer#end_iter;
457 let text = Pcre.replace ~pat:":=" ~templ:"\\def" text in
458 let text = Pcre.replace ~pat:"->" ~templ:"\\to" text in
459 let text = Pcre.replace ~pat:"=>" ~templ:"\\Rightarrow" text in
461 Pcre.substitute_substrings
463 let pristine = Pcre.get_substring str 0 in
465 if pristine.[0] = ' ' then
466 String.sub pristine 1 (String.length pristine -1)
470 if input.[String.length input-1] = ' ' then
471 String.sub input 0 (String.length input -1)
475 if input = "\\forall" ||
476 input = "\\lambda" ||
477 input = "\\exists" then "","" else " ", " "
480 before ^ Glib.Utf8.from_unichar
481 (snd (Virtuals.symbol_of_virtual input)) ^ after
482 with Virtuals.Not_a_virtual -> pristine)
483 ~pat:" ?\\\\[a-zA-Z]+ ?" text
485 buffer#insert ~iter:lock text
487 (** @param rel_offset relative offset from current position of locked_mark *)
488 method private moveMark rel_offset =
489 let mark = `MARK locked_mark in
490 let old_insert = buffer#get_iter_at_mark `INSERT in
491 buffer#remove_tag locked_tag ~start:buffer#start_iter ~stop:buffer#end_iter;
492 let current_mark_pos = buffer#get_iter_at_mark mark in
494 match rel_offset with
495 | 0 -> current_mark_pos
496 | n when n > 0 -> current_mark_pos#forward_chars n
497 | n (* when n < 0 *) -> current_mark_pos#backward_chars (abs n)
499 buffer#move_mark mark ~where:new_mark_pos;
500 buffer#apply_tag locked_tag ~start:buffer#start_iter ~stop:new_mark_pos;
501 buffer#move_mark `INSERT old_insert;
502 let mark_position = buffer#get_iter_at_mark mark in
503 if source_view#move_mark_onscreen mark then
505 buffer#move_mark mark mark_position;
506 source_view#scroll_to_mark ~use_align:true ~xalign:1.0 ~yalign:0.1 mark;
508 while Glib.Main.pending () do ignore(Glib.Main.iteration false); done
510 method clean_dirty_lock =
511 let lock_mark_iter = buffer#get_iter_at_mark (`MARK locked_mark) in
512 buffer#remove_tag locked_tag ~start:buffer#start_iter ~stop:buffer#end_iter;
513 buffer#apply_tag locked_tag ~start:buffer#start_iter ~stop:lock_mark_iter
515 val mutable observers = []
517 method addObserver (o: GrafiteTypes.status -> unit) =
518 observers <- o :: observers
520 method private notify =
521 let grafite_status = self#grafite_status in
522 List.iter (fun o -> o grafite_status) observers
524 method loadFromString s =
527 buffer#set_modified true
529 method loadFromFile f =
530 buffer#set_text (HExtlib.input_file f);
532 buffer#set_modified false
534 method assignFileName file =
537 | Some f -> Some (Librarian.absolutize f)
542 (match file with Some file -> read_include_paths file | None -> []);
544 Sys.chdir self#curdir;
545 HLog.debug ("Moving to " ^ Sys.getcwd ())
547 method saveToFile () =
548 if self#has_name then
549 let oc = open_out self#filename in
550 output_string oc (buffer#get_text ~start:buffer#start_iter
551 ~stop:buffer#end_iter ());
554 buffer#set_modified false
556 HLog.error "Can't save, no filename selected"
558 method private _saveToBackupFile () =
559 if buffer#modified then
561 let f = self#filename in
562 let oc = open_out f in
563 output_string oc (buffer#get_text ~start:buffer#start_iter
564 ~stop:buffer#end_iter ());
566 HLog.debug ("backup " ^ f ^ " saved")
569 method private reset_buffer =
571 history <- [ initial_statuses (Some self#grafite_status) self#buri_of_current_file ];
574 buffer#remove_tag locked_tag ~start:buffer#start_iter ~stop:buffer#end_iter;
575 buffer#move_mark (`MARK locked_mark) ~where:buffer#start_iter
579 source_buffer#begin_not_undoable_action ();
580 buffer#delete ~start:buffer#start_iter ~stop:buffer#end_iter;
581 source_buffer#end_not_undoable_action ();
582 buffer#set_modified false;
585 let template = HExtlib.input_file BuildTimeConf.script_template in
586 buffer#insert ~iter:(buffer#get_iter `START) template;
587 buffer#set_modified false;
590 method goto (pos: [`Top | `Bottom | `Cursor]) () =
592 let old_locked_mark =
594 (buffer#create_mark ~name:"old_locked_mark"
595 ~left_gravity:true (buffer#get_iter_at_mark (`MARK locked_mark))) in
596 let getpos _ = buffer#get_iter_at_mark (`MARK locked_mark) in
597 let getoldpos _ = buffer#get_iter_at_mark old_locked_mark in
598 let dispose_old_locked_mark () = buffer#delete_mark old_locked_mark in
601 dispose_old_locked_mark ();
608 let newpos = getpos () in
609 if (getoldpos ())#compare newpos < 0 then
611 buffer#move_mark old_locked_mark newpos;
616 dispose_old_locked_mark ();
619 | Margin -> dispose_old_locked_mark (); self#notify
620 | exc -> dispose_old_locked_mark (); self#notify; raise exc)
622 let locked_iter () = buffer#get_iter_at_mark (`NAME "locked") in
623 let cursor_iter () = buffer#get_iter_at_mark `INSERT in
626 (buffer#create_mark ~name:"initial_insert"
627 ~left_gravity:true (cursor_iter ())) in
628 let dispose_remember () = buffer#delete_mark remember in
629 let remember_iter () =
630 buffer#get_iter_at_mark (`NAME "initial_insert") in
631 let cmp () = (locked_iter ())#offset - (remember_iter ())#offset in
633 let forward_until_cursor () = (* go forward until locked > cursor *)
636 if cmp () < 0 && (getoldpos ())#compare (getpos ()) < 0
639 buffer#move_mark old_locked_mark (getpos ());
645 let rec back_until_cursor len = (* go backward until locked < cursor *)
647 statements, ((grafite_status)::_ as history)
649 self#_retract (icmp - len) grafite_status statements
651 | statement::tl1, _::tl2 ->
652 back_until_cursor (len - MatitaGtkMisc.utf8_string_length statement) (tl1,tl2)
653 | _,_ -> assert false
657 if icmp < 0 then (* locked < cursor *)
658 (forward_until_cursor (); self#notify)
659 else if icmp > 0 then (* locked > cursor *)
660 (back_until_cursor icmp (statements,history); self#notify)
661 else (* cursor = locked *)
665 dispose_old_locked_mark ();
667 | Margin -> dispose_remember (); dispose_old_locked_mark (); self#notify
668 | exc -> dispose_remember (); dispose_old_locked_mark ();
669 self#notify; raise exc)
670 with Invalid_argument "Array.make" ->
671 HLog.error "The script is too big!\n"
673 method stack = (assert false : Continuationals.Stack.t) (* MATITA 1.0 GrafiteTypes.get_stack
674 self#grafite_status *)
675 method setGoal n = userGoal <- n
676 method goal = userGoal
684 let rec is_there_only_comments lexicon_status s =
685 if Pcre.pmatch ~rex:only_dust_RE s then raise Margin;
687 GrafiteParser.parse_statement lexicon_status (Ulexing.from_utf8_string s)
689 | GrafiteAst.Comment (loc,_) ->
690 let _,parsed_text_length = MatitaGtkMisc.utf8_parsed_text s loc in
691 (* CSC: why +1 in the following lines ???? *)
692 let parsed_text_length = parsed_text_length + 1 in
693 let remain_len = String.length s - parsed_text_length in
694 let next = String.sub s parsed_text_length remain_len in
695 is_there_only_comments lexicon_status next
696 | GrafiteAst.Executable _ -> false
698 try is_there_only_comments self#grafite_status self#getFuture
700 | NCicLibrary.IncludedFileNotCompiled _
701 | HExtlib.Localized _
702 | CicNotationParser.Parse_error _ -> false
703 | Margin | End_of_file -> true
704 | Invalid_argument "Array.make" -> false
708 HLog.debug "script status:";
709 HLog.debug ("history size: " ^ string_of_int (List.length history));
710 HLog.debug (sprintf "%d statements:" (List.length statements));
711 List.iter HLog.debug statements;
712 HLog.debug ("Current file name: " ^ self#filename);
715 let _script = ref None
717 let script ~source_view ~mathviewer ~urichooser ~ask_confirmation ~set_star ()
720 ~source_view ~mathviewer ~ask_confirmation ~urichooser ~set_star ()
725 let current () = match !_script with None -> assert false | Some s -> s