1/* Part of SWI-Prolog 2 3 Author: Jan Wielemaker 4 E-mail: J.Wielemaker@vu.nl 5 WWW: http://www.swi-prolog.org 6 Copyright (c) 1985-2025, University of Amsterdam 7 VU University Amsterdam 8 CWI Amsterdam 9 SWI-Prolog Solutions b.v. 10 All rights reserved. 11 12 Redistribution and use in source and binary forms, with or without 13 modification, are permitted provided that the following conditions 14 are met: 15 16 1. Redistributions of source code must retain the above copyright 17 notice, this list of conditions and the following disclaimer. 18 19 2. Redistributions in binary form must reproduce the above copyright 20 notice, this list of conditions and the following disclaimer in 21 the documentation and/or other materials provided with the 22 distribution. 23 24 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 25 "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 26 LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 27 FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 28 COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 29 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 30 BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 31 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER 32 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN 34 ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 35 POSSIBILITY OF SUCH DAMAGE. 36*/ 37 38:- module('$history', 39 [ read_term_with_history/2 % -Term, +Line 40 ]). 41 42:- multifile 43 prolog:history/2.
50read_term_with_history(Term, Options) :- 51 '$option'(prompt(Prompt), Options, '~! ?-'), 52 '$option'(input(Input), Options, user_input), 53 repeat, 54 prompt_history(Prompt), 55 '$toplevel':read_query_line(Input, Raw), 56 read_history_(Raw, Term, Options), 57 !. 58 59read_history_(Raw, _Term, Options) :- 60 '$option'(show(Raw), Options, history), 61 list_history, 62 !, 63 fail. 64read_history_(Raw, _Term, Options) :- 65 '$option'(help(Raw), Options, '!help'), 66 '$option'(show(Show), Options, '!history'), 67 print_message(help, history(help(Show, Raw))), 68 !, 69 fail. 70read_history_(Raw, Term, Options) :- 71 expand_history(Raw, Expanded, Changed), 72 add_to_history(Expanded, Options), 73 '$option'(module(Module), Options, Var), 74 ( Module == Var 75 -> '$current_typein_module'(Module) 76 ; true 77 ), 78 '$option'(variable_names(Bindings), Options, Bindings0), 79 history_blob_mode(Changed, BlobMode), 80 catch(read_term_from_atom(Expanded, Term0, 81 [ module(Module), 82 variable_names(Bindings0), 83 blob(BlobMode) 84 ]), 85 E, 86 ( print_message(error, E), 87 fail 88 )), 89 ( var(Term0) 90 -> Term = Term0, 91 Bindings = Bindings0 92 ; ( Changed == true 93 -> print_message(query, history(expanded(Expanded))) 94 ; true 95 ), 96 Term = Term0, 97 Bindings = Bindings0 98 ).
108history_blob_mode(true, dead) :- !. % expanded from history 109history_blob_mode(_, resolve).
115list_history :- 116 prolog:history(current_input, events(Events0)), 117 !, 118 '$reverse'(Events0, Events), 119 print_message(query, history(history(Events))). 120list_history :- 121 print_message(query, history(no_history)).
128prompt_history('') :- 129 !, 130 ttyflush. 131prompt_history(Prompt) :- 132 ( prolog:history(current_input, curr(Curr, _)) 133 -> This is Curr + 1 134 ; This = 1 135 ), 136 atom_codes(Prompt, SP), 137 atom_codes(This, ST), 138 ( atom_codes('~!', Repl), 139 substitute(Repl, ST, SP, String) 140 -> prompt1(String) 141 ; prompt1(Prompt) 142 ), 143 ttyflush.
149substitute(Old, New, String, Substituted) :-
150 '$append'(Head, OldAndTail, String),
151 '$append'(Old, Tail, OldAndTail),
152 !,
153 '$append'(Head, New, HeadAndNew),
154 '$append'(HeadAndNew, Tail, Substituted).161add_to_history(end_of_file, _) :- !. 162add_to_history(Line, Options) :- 163 '$option'(no_save(NoSave), Options), 164 catch(term_string(Query, Line), error(_,_), fail), 165 nonvar(Query), 166 memberchk(Query, NoSave), 167 !. 168add_to_history(Line, _Options) :- 169 format(string(CompleteLine), '~W~W', 170 [ Line, [partial(true)], 171 '.', [partial(true)] 172 ]), 173 catch(prolog:history(user_input, add(CompleteLine)), _, fail), 174 !. 175add_to_history(_, _).
!match % Last event starting <match> !n % Event nr. <n> !! % last event
Note: the first character after a '!' should be a letter or number to avoid problems with the cut.
188expand_history(Raw, Expanded, Changed) :- 189 atom_chars(Raw, RawString), 190 expand_history2(RawString, ExpandedString, Changed), 191 atom_chars(Expanded, ExpandedString), 192 !. 193 194expand_history2([!], [!], false) :- !. 195expand_history2([!, C|Rest], [!|Expanded], Changed) :- 196 not_event_char(C), 197 !, 198 expand_history2([C|Rest], Expanded, Changed). 199expand_history2([!|Rest], Expanded, true) :- 200 !, 201 match_event(Rest, Event, NewRest), 202 '$append'(Event, RestExpanded, Expanded), 203 !, 204 expand_history2(NewRest, RestExpanded, _). 205expand_history2(['\''|In], ['\''|Out], Changed) :- 206 !, 207 skip_quoted(In, '\'', Out, Tin, Tout), 208 expand_history2(Tin, Tout, Changed). 209expand_history2(['"'|In], ['"'|Out], Changed) :- 210 !, 211 skip_quoted(In, '"', Out, Tin, Tout), 212 expand_history2(Tin, Tout, Changed). 213expand_history2([H|T], [H|R], Changed) :- 214 !, 215 expand_history2(T, R, Changed). 216expand_history2([], [], false). 217 218skip_quoted([Q|T],Q,[Q|R], T, R) :- !. 219skip_quoted([\,Q|T0],Q,[\,Q|T], In, Out) :- 220 !, 221 skip_quoted(T0, Q, T, In, Out). 222skip_quoted([Q,Q|T0],Q,[Q,Q|T], In, Out) :- 223 !, 224 skip_quoted(T0, Q, T, In, Out). 225skip_quoted([C|T0],Q,[C|T], In, Out) :- 226 !, 227 skip_quoted(T0, Q, T, In, Out). 228skip_quoted([], _, [], [], []).
235get_last_event(Event) :- 236 prolog:history(current_input, first(_Num, String)), 237 string_chars(String, Event0), 238 remove_full_stop(Event0, Event), 239 !. 240get_last_event(_) :- 241 print_message(query, history(no_event)), 242 fail. 243 244remove_full_stop(In, Out) :- 245 phrase(remove_full_stop(Out), In). 246 247remove_full_stop([]) --> 248 spaces, ['.'], spaces, eos, 249 !. 250remove_full_stop([H|T]) --> 251 [H], !, 252 remove_full_stop(T). 253remove_full_stop([]) --> 254 []. 255 256spaces --> space, !, spaces. 257spaces --> []. 258 259space --> 260 [C], 261 { char_type(C, space) }. 262 263eos([], []). 264 265% match_event(+Spec, -Event, -Rest) 266% Use Spec as a specification of and event and return the event as Event 267% and what is left of Spec as Rest. 268 269match_event(Spec, Event, Rest) :- 270 find_event(Spec, Event, Rest), 271 !. 272match_event(_, _, _) :- 273 print_message(query, history(no_event)), 274 fail. 275 276not_event_char(C) :- code_type(C, csym), !, fail. 277not_event_char(!) :- !, fail. 278not_event_char(_). 279 280find_event([!|Left], Event, Left) :- 281 !, 282 get_last_event(Event). 283find_event([N|Rest], Event, Left) :- 284 code_type(N, digit), 285 !, 286 take_number([N|Rest], NumCodes, Left), 287 number_codes(Number, NumCodes), 288 prolog:history(current_input, event(Number, String)), 289 string_chars(String, Event0), 290 remove_full_stop(Event0, Event). 291find_event(Spec, Event, Left) :- 292 take_string(Spec, String, Left), 293 matching_event(String, Event). 294 295take_string([C|Rest], [C|String], Left) :- 296 code_type(C, csym), 297 !, 298 take_string(Rest, String, Left). 299take_string([C|Rest], [], [C|Rest]) :- !. 300take_string([], [], []). 301 302take_number([C|Rest], [C|String], Left) :- 303 code_type(C, digit), 304 !, 305 take_string(Rest, String, Left). 306take_number([C|Rest], [], [C|Rest]) :- !. 307take_number([], [], []).
314matching_event(String, Chars) :-
315 prolog:history(current_input, prev_str(String, _Num, String)),
316 string_chars(String, Chars0),
317 remove_full_stop(Chars0, Chars)