350 lines
7.1 KiB
Prolog
350 lines
7.1 KiB
Prolog
/**
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* @file jupyter.yap
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*
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* @brief allow interaction between Jupyter and YAP.
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*
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* @long The code in here:
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* - establishes communication between Prolog and Python Streams
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* - inputs Prolog code and queries
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* - supports completion of Prolog programs.
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* -
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*/
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:- module(jupyter, [jupyter_query/3,
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ready/3,
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valid/3,
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errors/2]).
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:- use_module(library(yapi)).
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:- use_module(library(lists)).
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:- use_module(library(maplist)).
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:- use_module(library(python)).
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:- python_import(sys).
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:- dynamic user:portray_message/2.
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:- multifile user:portray_message/2.
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jupyter_query(Self, Cell, Line ) :-
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setup_call_cleanup(
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enter_cell(Self),
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jupyter_cell(Self, Cell, Line),
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exit_cell(Self)
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).
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ready(_Self, Line ) :-
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blank( Line ),
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!.
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ready(Self, Line ) :-
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errors( Self, Line ),
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\+ syntax_error(_,_).
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errors( Self, Text ) :-
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setup_call_cleanup(
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open_events( Self, Text, Stream),
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clauses(Self, Stream),
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close_events( Self )
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).
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clauses(Self, Stream) :-
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repeat,
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read_clause(Stream, Cl, [term_position(_Pos), syntax_errors(fail)] ),
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command( Self, Cl ),
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Cl == end_of_file,
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!.
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command( _Self, ( :- op(Prio,Assoc,Name) ) ) :-
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addop(Prio,Assoc,Name).
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command( _Self, ( :- module(Name, Exports) )) :-
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retract( active_module( M0 ) ),
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atom_concat( '__m0_', Name, M ),
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assert( active_module(M) ),
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assert( undo( active_module(M0) ) ),
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maplist( addop2(M), Exports).
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addop(Prio,Assoc,Name) :-
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(
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current_op(OPrio, SimilarAssoc, Name),
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op(Prio, Assoc, Name),
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matched_op(Assoc, SimilarAssoc)
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->
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assertz( undo(op( OPrio, Assoc, Name ) ) )
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;
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assertz( undo(op( 0, Assoc, Name ) ) )
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).
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addop2(M, op(Prio, Assoc, Name)) :-
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addop( Prio, Assoc, M:Name ).
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matched_op(A, B) :-
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optype( A, T),
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optype( B, T).
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optype(fx,pre).
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optype(fy,pre).
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optype(xfx,in).
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optype(xfy,in).
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optype(yfx,in).
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optype(yfy,in).
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optype(xf,pos).
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optype(yf,pos).
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:- dynamic user:portray_message/2.
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:- multifile user:portray_message/2.
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:- dynamic syntax_error/2, undo/1.
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open_events(Self, Text, Stream) :-
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Self.errors := [],
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open_mem_read_stream( Text, Stream ),
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assert((user:portray_message(_Severity, error(error(syntax_error(_),info(between(_,LN,_), _FileName, CharPos, _Details)))) :-
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assert( syntax_error(LN,CharPos) )
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)).
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close_events( Self ) :-
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retract( undo(G) ),
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call(G),
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fail.
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close_events( Self ) :-
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retract( syntax_error( L, N )),
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Self.errors := [t(L,N)] + Self.errors,
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fail.
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close_events( _ ).
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cell2pq( Cell, ``, ``) :-
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sub_string(Cell, 0, 2, _, `%%`),
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string_code(3, Cell, Code),
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code_type(Code, alpha),
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!.
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cell2pq( Cell, P, Q, N) :-
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sub_string(Cell, 0, 1, _, `%`),
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string_codes(Cell, [Code|Codes]),
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code_type(Code, alpha),
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skip(10, Codes, Rest, LineF,Line1),
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skip_blanks(Rest, Body, Line1,Line0),
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reverse(Body, RBody),
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cell2pq2(RBody, Ps, Qs, N),
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extend(Ps, Qs, LineF, Line0, NPs, NQs),
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string_codes(P, NPs),
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string_codes(Q, NQs).
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cell2pq( Cell, P, Q, N) :-
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string_codes(Cell, Codes),
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reverse(Codes, RCodes),
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cell2pq2(RCodes, NPs, NQs, N),
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string_codes(P, NPs),
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string_codes(Q, NQs).
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%
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% terminates with dot
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%
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cell2pq2(RCodes, NP, NQ, N) :-
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skip_allblanks( RCodes, [C|Rest], L1, L0),
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( C =:= "."
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->
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N = 1,
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RP = RCodes,
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RQ = ""
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;
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skip_to_blank_line( [C|Rest], RP, L0, []),
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RQ = L1,
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(
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C =:= "*"
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->
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N = -1
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;
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N=1
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)
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),
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reverse(RP,NP),
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reverse(RQ,NQ).
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/**
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* @pred skip( Char, Input, Remainder, Begin, End)
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*
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* split the list according to character _Char_:
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*
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* - _Remainder_ is what is after chars
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* - _Begin_-_End_ represents what is before char.
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*
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*/
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skip(_, "", "") -->
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!,
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[].
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skip(C, [C|Cs], Cs) -->
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!,
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[C].
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skip(C, [OC|Cs], Line) -->
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[OC],
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skip(C,Cs, Line).
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skip_to_blank_line("", "") -->
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!.
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skip_to_blank_line(Cs, Left) -->
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blank_line(Cs, Left),
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!,
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[].
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skip_to_blank_line(Cs, Line) -->
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line(Cs, Line),
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!.
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blank_line("", []) --> [].
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blank_line([10|Cs], Cs) -->
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[10],
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!.
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blank_line([C|Cs], Rest) -->
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{ code_type(C, white)},
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!,
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[C],
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blank_line(Cs, Rest).
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line("", []) -->
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[].
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line([10|Cs], Cs) -->
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[10],
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!.
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line([C|Cs], Rest) -->
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[C],
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line(Cs,Rest).
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jupyter_cell(_Self, Cell, _) :-
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% stop_low_level_trace,
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jupyter_consult(Cell),
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fail.
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jupyter_cell( _Self, _, Line ) :-
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blank( Line ),
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!.
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jupyter_cell( Self, _, Line ) :-
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% start_low_level_trace,
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python_query( Self, Line ).
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jupyter_consult(Text) :-
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blank( Text ),
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!.
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jupyter_consult(Cell) :-
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open_mem_read_stream( Cell, Stream),
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load_files(user:'jupyter cell',[stream(Stream)]).
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%should load_files close?
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blank(Text) :-
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atom_codes(Text, L),
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maplist( blankc, L).
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blankc(' ').
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blankc('\n').
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blankc('\t').
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enter_cell(_Self) :-
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%open('//python/sys.stdin', read, _Input, []),
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open('//python/sys.stdout', append, _Output, []),
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open('//python/sys.stdout', append, _Error, []),
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%set_prolog_flag(user_input, _Input),
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set_prolog_flag(user_output, _Output),
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set_prolog_flag(user_error, _Error).
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exit_cell(_Self) :-
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%close( user_input),
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close( user_output),
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close( user_error).
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completions(S, Self) :-
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open_mem_read_stream(S, St),
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scan_to_list(St, Tokens),
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close(St),
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reverse(Tokens, RTokens),
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strip_final_tokens(RTokens, MyTokens),
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setof( Completion, complete(MyTokens, Completion), Cs),
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Self.completions := Cs.
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strip_final_tokens(['EOT'|Ts], Ts) :- !.
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strip_final_tokens( Ts, Ts ).
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complete([E,l,C,l,A|More],
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isconsult(A),
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%B = l,
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library(C,Lib),
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%D=l,
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E=atom(Prefix),
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\+ arg( Rest ),
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check_library( Prefix, Lib, C).
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complete([E,l,C,l,-,'['|More],
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isconsult(A),
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%B = l,
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library(C,Lib),
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%D=l,
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E=atom(Prefix),
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\+ arg( Rest ),
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check_library( Prefix, Lib, C).
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complete([C,l,A|More],
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isconsult(A),
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%B = l,
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C=atom(Prefix),
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\+ arg( Rest ),
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file_or_library( Prefix, C).
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complete([C,l,-,'['|More],
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isconsult(A),
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%B = l,
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C=atom(Prefix),
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\+ arg( Rest ),
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file_or_library( Prefix, C).
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complete( [atom(F)|Rest], C) :-
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\+ arg( Rest ),
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predicate( F, Pred, Arity ),
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cont( Arity, F, Pred, C).
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isconsult( atom(use_module) ).
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isconsult( atom(ensure_loaded) ).
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isconsult( atom(compile) ).
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isconsult( atom(consult) ).
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isconsult( atom(reconsult) ).
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isconsult( atom(load_files) ).
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isconsult( '[' ).
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arg([']'|_]).
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arg([l|_]).
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file_or_library(F,C) :-
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libsym(C0),
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atom_cooncat(F,C,C0).
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file_or_library(F,C) :-
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check_file(F,C).
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check_file(F0,C) :-
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atom_concat('\'',F,F0),
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!,
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absolute_file_name( F, FF, [access(none)] ),
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atom_concat( FF, '*' , Pat),
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absolute_file_name( Pat, C0, [glob(true)] ),
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atom_concat(Pat,C00,C0),
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atom_conct(C00,'\'',C).
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check_file(F0,C) :-
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atom_concat( F0, '*' , Pat),
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absolute_file_name( Pat, C0, [glob(true)] ),
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atom_concat(Pat,C,C0).
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check_library( Lib, F, C) :-
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atom_concat( F, '*' , Pat),
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LibF =.. [Lib(Pat)],
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absolute_file_name( LibF, Lib, [glob(true)] ),
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file_directory_name( Lib, Name),
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( atom_concat(C, '.yap', Name) -> true ;
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atom_concat(C, '.ypp', Name) -> true ;
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atom_concat(C, '.prolog', Name) -> true
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).
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predicate(N,P,A) :-
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system_predicate(P0/A),
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atom_concat(N,P,P0).
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predicate(N,P,A) :-
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current_predicate(P0/A),
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atom_concat(N,P,P0).
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cont(0, F, P, P0) :-
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atom_concat( F, P, P0 ).
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cont( _, F, P, PB ):-
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atom_concat( [F, P, '('], PB ).
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