forked from JuliaLang/julia
-
Notifications
You must be signed in to change notification settings - Fork 0
/
REPL.jl
1110 lines (1005 loc) · 37.2 KB
/
REPL.jl
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
# This file is a part of Julia. License is MIT: https://julialang.org/license
module REPL
using Base.Meta
using ..Terminals
using ..LineEdit
using ..REPLCompletions
export
AbstractREPL,
BasicREPL,
LineEditREPL,
StreamREPL
import Base:
Display,
display,
show,
AnyDict,
==
import ..LineEdit:
CompletionProvider,
HistoryProvider,
add_history,
complete_line,
history_next,
history_next_prefix,
history_prev,
history_prev_prefix,
history_first,
history_last,
history_search,
accept_result,
terminal
abstract type AbstractREPL end
answer_color(::AbstractREPL) = ""
const JULIA_PROMPT = "julia> "
mutable struct REPLBackend
"channel for AST"
repl_channel::Channel
"channel for results: (value, nothing) or (error, backtrace)"
response_channel::Channel
"flag indicating the state of this backend"
in_eval::Bool
"current backend task"
backend_task::Task
REPLBackend(repl_channel, response_channel, in_eval) =
new(repl_channel, response_channel, in_eval)
end
function eval_user_input(@nospecialize(ast), backend::REPLBackend)
iserr, lasterr = false, ((), nothing)
Base.sigatomic_begin()
while true
try
Base.sigatomic_end()
if iserr
put!(backend.response_channel, lasterr)
iserr, lasterr = false, ()
else
backend.in_eval = true
value = eval(Main, ast)
backend.in_eval = false
# note: value wrapped carefully here to ensure it doesn't get passed through expand
eval(Main, Expr(:body, Expr(:(=), :ans, QuoteNode(value)), Expr(:return, nothing)))
put!(backend.response_channel, (value, nothing))
end
break
catch err
if iserr
println("SYSTEM ERROR: Failed to report error to REPL frontend")
println(err)
end
iserr, lasterr = true, (err, catch_backtrace())
end
end
Base.sigatomic_end()
end
function start_repl_backend(repl_channel::Channel, response_channel::Channel)
backend = REPLBackend(repl_channel, response_channel, false)
backend.backend_task = @schedule begin
# include looks at this to determine the relative include path
# nothing means cwd
while true
tls = task_local_storage()
tls[:SOURCE_PATH] = nothing
ast, show_value = take!(backend.repl_channel)
if show_value == -1
# exit flag
break
end
eval_user_input(ast, backend)
end
end
backend
end
function ip_matches_func(ip, func::Symbol)
for fr in StackTraces.lookup(ip)
if fr === StackTraces.UNKNOWN || fr.from_c
return false
end
fr.func === func && return true
end
return false
end
struct REPLDisplay{R<:AbstractREPL} <: Display
repl::R
end
==(a::REPLDisplay, b::REPLDisplay) = a.repl === b.repl
function display(d::REPLDisplay, mime::MIME"text/plain", x)
io = outstream(d.repl)
Base.have_color && write(io, answer_color(d.repl))
show(IOContext(io, :limit => true), mime, x)
println(io)
end
display(d::REPLDisplay, x) = display(d, MIME("text/plain"), x)
function print_response(repl::AbstractREPL, @nospecialize(val), bt, show_value::Bool, have_color::Bool)
repl.waserror = bt !== nothing
print_response(outstream(repl), val, bt, show_value, have_color, specialdisplay(repl))
end
function print_response(errio::IO, @nospecialize(val), bt, show_value::Bool, have_color::Bool, specialdisplay=nothing)
Base.sigatomic_begin()
while true
try
Base.sigatomic_end()
if bt !== nothing
Base.invokelatest(Base.display_error, errio, val, bt)
iserr, lasterr = false, ()
else
if val !== nothing && show_value
try
if specialdisplay === nothing
Base.invokelatest(display, val)
else
Base.invokelatest(display, specialdisplay, val)
end
catch err
println(errio, "Error showing value of type ", typeof(val), ":")
rethrow(err)
end
end
end
break
catch err
if bt !== nothing
println(errio, "SYSTEM: show(lasterr) caused an error")
println(errio, err)
Base.show_backtrace(errio, bt)
break
end
val = err
bt = catch_backtrace()
end
end
Base.sigatomic_end()
end
# A reference to a backend
struct REPLBackendRef
repl_channel::Channel
response_channel::Channel
end
function run_repl(repl::AbstractREPL, consumer::Function = x->nothing)
repl_channel = Channel(1)
response_channel = Channel(1)
backend = start_repl_backend(repl_channel, response_channel)
consumer(backend)
run_frontend(repl, REPLBackendRef(repl_channel,response_channel))
return backend
end
## BasicREPL ##
mutable struct BasicREPL <: AbstractREPL
terminal::TextTerminal
waserror::Bool
BasicREPL(t) = new(t,false)
end
outstream(r::BasicREPL) = r.terminal
function run_frontend(repl::BasicREPL, backend::REPLBackendRef)
d = REPLDisplay(repl)
dopushdisplay = !in(d,Base.Multimedia.displays)
dopushdisplay && pushdisplay(d)
repl_channel, response_channel = backend.repl_channel, backend.response_channel
hit_eof = false
while true
Base.reseteof(repl.terminal)
write(repl.terminal, JULIA_PROMPT)
line = ""
ast = nothing
interrupted = false
while true
try
line *= readline(repl.terminal, chomp=false)
catch e
if isa(e,InterruptException)
try # raise the debugger if present
ccall(:jl_raise_debugger, Int, ())
end
line = ""
interrupted = true
break
elseif isa(e,EOFError)
hit_eof = true
break
else
rethrow()
end
end
ast = Base.parse_input_line(line)
(isa(ast,Expr) && ast.head == :incomplete) || break
end
if !isempty(line)
put!(repl_channel, (ast, 1))
val, bt = take!(response_channel)
if !ends_with_semicolon(line)
print_response(repl, val, bt, true, false)
end
end
write(repl.terminal, '\n')
((!interrupted && isempty(line)) || hit_eof) && break
end
# terminate backend
put!(repl_channel, (nothing, -1))
dopushdisplay && popdisplay(d)
end
## User Options
mutable struct Options
hascolor::Bool
extra_keymap::Union{Dict,Vector{<:Dict}}
backspace_align::Bool
backspace_adjust::Bool
end
Options(;
hascolor = true,
extra_keymap = AnyDict[],
backspace_align = true, backspace_adjust = backspace_align) =
Options(hascolor, extra_keymap, backspace_align, backspace_adjust)
## LineEditREPL ##
mutable struct LineEditREPL <: AbstractREPL
t::TextTerminal
hascolor::Bool
prompt_color::String
input_color::String
answer_color::String
shell_color::String
help_color::String
history_file::Bool
in_shell::Bool
in_help::Bool
envcolors::Bool
waserror::Bool
specialdisplay::Union{Void,Display}
options::Options
interface::ModalInterface
backendref::REPLBackendRef
LineEditREPL(t,hascolor,prompt_color,input_color,answer_color,shell_color,help_color,history_file,in_shell,in_help,envcolors) =
new(t,true,prompt_color,input_color,answer_color,shell_color,help_color,history_file,in_shell,
in_help,envcolors,false,nothing, Options())
end
outstream(r::LineEditREPL) = r.t
specialdisplay(r::LineEditREPL) = r.specialdisplay
specialdisplay(r::AbstractREPL) = nothing
terminal(r::LineEditREPL) = r.t
LineEditREPL(t::TextTerminal, envcolors::Bool=false) =
LineEditREPL(t, true,
Base.text_colors[:green],
Base.input_color(),
Base.answer_color(),
Base.text_colors[:red],
Base.text_colors[:yellow],
false, false, false, envcolors
)
mutable struct REPLCompletionProvider <: CompletionProvider end
mutable struct ShellCompletionProvider <: CompletionProvider end
struct LatexCompletions <: CompletionProvider end
beforecursor(buf::IOBuffer) = String(buf.data[1:buf.ptr-1])
function complete_line(c::REPLCompletionProvider, s)
partial = beforecursor(s.input_buffer)
full = LineEdit.input_string(s)
ret, range, should_complete = completions(full, endof(partial))
return ret, partial[range], should_complete
end
function complete_line(c::ShellCompletionProvider, s)
# First parse everything up to the current position
partial = beforecursor(s.input_buffer)
full = LineEdit.input_string(s)
ret, range, should_complete = shell_completions(full, endof(partial))
return ret, partial[range], should_complete
end
function complete_line(c::LatexCompletions, s)
partial = beforecursor(LineEdit.buffer(s))
full = LineEdit.input_string(s)
ret, range, should_complete = bslash_completions(full, endof(partial))[2]
return ret, partial[range], should_complete
end
mutable struct REPLHistoryProvider <: HistoryProvider
history::Array{String,1}
history_file::Union{Void,IO}
start_idx::Int
cur_idx::Int
last_idx::Int
last_buffer::IOBuffer
last_mode::Union{Void,Prompt}
mode_mapping::Dict
modes::Array{Symbol,1}
end
REPLHistoryProvider(mode_mapping) =
REPLHistoryProvider(String[], nothing, 0, 0, -1, IOBuffer(),
nothing, mode_mapping, UInt8[])
invalid_history_message(path::String) = """
Invalid history file ($path) format:
If you have a history file left over from an older version of Julia,
try renaming or deleting it.
Invalid character: """
munged_history_message(path::String) = """
Invalid history file ($path) format:
An editor may have converted tabs to spaces at line """
function hist_getline(file)
while !eof(file)
line = readline(file, chomp=false)
isempty(line) && return line
line[1] in "\r\n" || return line
end
return ""
end
function hist_from_file(hp, file, path)
hp.history_file = file
seek(file, 0)
countlines = 0
while true
mode = :julia
line = hist_getline(file)
isempty(line) && break
countlines += 1
line[1] != '#' &&
error(invalid_history_message(path), repr(line[1]), " at line ", countlines)
while !isempty(line)
m = match(r"^#\s*(\w+)\s*:\s*(.*?)\s*$", line)
m === nothing && break
if m.captures[1] == "mode"
mode = Symbol(m.captures[2])
end
line = hist_getline(file)
countlines += 1
end
isempty(line) && break
# Make sure starts with tab
line[1] == ' ' &&
error(munged_history_message(path), countlines)
line[1] != '\t' &&
error(invalid_history_message(path), repr(line[1]), " at line ", countlines)
lines = String[]
while !isempty(line)
push!(lines, chomp(line[2:end]))
eof(file) && break
ch = Char(Base.peek(file))
ch == ' ' && error(munged_history_message(path), countlines)
ch != '\t' && break
line = hist_getline(file)
countlines += 1
end
push!(hp.modes, mode)
push!(hp.history, join(lines, '\n'))
end
seekend(file)
hp.start_idx = length(hp.history)
hp
end
function mode_idx(hist::REPLHistoryProvider, mode)
c = :julia
for (k,v) in hist.mode_mapping
isequal(v, mode) && (c = k)
end
return c
end
function add_history(hist::REPLHistoryProvider, s)
str = rstrip(String(take!(copy(s.input_buffer))))
isempty(strip(str)) && return
mode = mode_idx(hist, LineEdit.mode(s))
!isempty(hist.history) &&
isequal(mode, hist.modes[end]) && str == hist.history[end] && return
push!(hist.modes, mode)
push!(hist.history, str)
hist.history_file === nothing && return
entry = """
# time: $(Libc.strftime("%Y-%m-%d %H:%M:%S %Z", time()))
# mode: $mode
$(replace(str, r"^"ms, "\t"))
"""
# TODO: write-lock history file
seekend(hist.history_file)
print(hist.history_file, entry)
flush(hist.history_file)
end
function history_move(s::Union{LineEdit.MIState,LineEdit.PrefixSearchState}, hist::REPLHistoryProvider, idx::Int, save_idx::Int = hist.cur_idx)
max_idx = length(hist.history) + 1
@assert 1 <= hist.cur_idx <= max_idx
(1 <= idx <= max_idx) || return :none
idx != hist.cur_idx || return :none
# save the current line
if save_idx == max_idx
hist.last_mode = LineEdit.mode(s)
hist.last_buffer = copy(LineEdit.buffer(s))
else
hist.history[save_idx] = LineEdit.input_string(s)
hist.modes[save_idx] = mode_idx(hist, LineEdit.mode(s))
end
# load the saved line
if idx == max_idx
last_buffer = hist.last_buffer
LineEdit.transition(s, hist.last_mode) do
LineEdit.replace_line(s, last_buffer)
end
hist.last_mode = nothing
hist.last_buffer = IOBuffer()
else
if haskey(hist.mode_mapping, hist.modes[idx])
LineEdit.transition(s, hist.mode_mapping[hist.modes[idx]]) do
LineEdit.replace_line(s, hist.history[idx])
end
else
return :skip
end
end
hist.cur_idx = idx
return :ok
end
# Modified version of accept_result that also transitions modes
function LineEdit.accept_result(s, p::LineEdit.HistoryPrompt{REPLHistoryProvider})
parent = LineEdit.state(s, p).parent
hist = p.hp
if 1 <= hist.cur_idx <= length(hist.modes)
m = hist.mode_mapping[hist.modes[hist.cur_idx]]
LineEdit.transition(s, m) do
LineEdit.replace_line(LineEdit.state(s, m), LineEdit.state(s, p).response_buffer)
end
else
LineEdit.transition(s, parent)
end
end
function history_prev(s::LineEdit.MIState, hist::REPLHistoryProvider,
num::Int=1, save_idx::Int = hist.cur_idx)
num <= 0 && return history_next(s, hist, -num, save_idx)
hist.last_idx = -1
m = history_move(s, hist, hist.cur_idx-num, save_idx)
if m === :ok
LineEdit.move_input_start(s)
LineEdit.reset_key_repeats(s) do
LineEdit.move_line_end(s)
end
LineEdit.refresh_line(s)
elseif m === :skip
history_prev(s, hist, num+1, save_idx)
else
Terminals.beep(s)
end
end
function history_next(s::LineEdit.MIState, hist::REPLHistoryProvider,
num::Int=1, save_idx::Int = hist.cur_idx)
if num == 0
Terminals.beep(s)
return
end
num < 0 && return history_prev(s, hist, -num, save_idx)
cur_idx = hist.cur_idx
max_idx = length(hist.history) + 1
if cur_idx == max_idx && 0 < hist.last_idx
# issue #6312
cur_idx = hist.last_idx
hist.last_idx = -1
end
m = history_move(s, hist, cur_idx+num, save_idx)
if m === :ok
LineEdit.move_input_end(s)
LineEdit.refresh_line(s)
elseif m === :skip
history_next(s, hist, num+1, save_idx)
else
Terminals.beep(s)
end
end
history_first(s::LineEdit.MIState, hist::REPLHistoryProvider) =
history_prev(s, hist, hist.cur_idx - 1 -
(hist.cur_idx > hist.start_idx+1 ? hist.start_idx : 0))
history_last(s::LineEdit.MIState, hist::REPLHistoryProvider) =
history_next(s, hist, length(hist.history) - hist.cur_idx + 1)
function history_move_prefix(s::LineEdit.PrefixSearchState,
hist::REPLHistoryProvider,
prefix::AbstractString,
backwards::Bool,
cur_idx = hist.cur_idx)
cur_response = String(take!(copy(LineEdit.buffer(s))))
# when searching forward, start at last_idx
if !backwards && hist.last_idx > 0
cur_idx = hist.last_idx
end
hist.last_idx = -1
max_idx = length(hist.history)+1
idxs = backwards ? ((cur_idx-1):-1:1) : ((cur_idx+1):max_idx)
for idx in idxs
if (idx == max_idx) || (startswith(hist.history[idx], prefix) && (hist.history[idx] != cur_response || hist.modes[idx] != LineEdit.mode(s)))
m = history_move(s, hist, idx)
if m === :ok
if idx == max_idx
# on resuming the in-progress edit, leave the cursor where the user last had it
elseif isempty(prefix)
# on empty prefix search, move cursor to the end
LineEdit.move_input_end(s)
else
# otherwise, keep cursor at the prefix position as a visual cue
seek(LineEdit.buffer(s), sizeof(prefix))
end
LineEdit.refresh_line(s)
return :ok
elseif m === :skip
return history_move_prefix(s,hist,prefix,backwards,idx)
end
end
end
Terminals.beep(s)
end
history_next_prefix(s::LineEdit.PrefixSearchState, hist::REPLHistoryProvider, prefix::AbstractString) =
history_move_prefix(s, hist, prefix, false)
history_prev_prefix(s::LineEdit.PrefixSearchState, hist::REPLHistoryProvider, prefix::AbstractString) =
history_move_prefix(s, hist, prefix, true)
function history_search(hist::REPLHistoryProvider, query_buffer::IOBuffer, response_buffer::IOBuffer,
backwards::Bool=false, skip_current::Bool=false)
qpos = position(query_buffer)
qpos > 0 || return true
searchdata = beforecursor(query_buffer)
response_str = String(take!(copy(response_buffer)))
# Alright, first try to see if the current match still works
a = position(response_buffer) + 1 # position is zero-indexed
b = min(endof(response_str), prevind(response_str, a + sizeof(searchdata))) # ensure that b is valid
!skip_current && searchdata == response_str[a:b] && return true
searchfunc, searchstart, skipfunc = backwards ? (rsearch, b, prevind) :
(search, a, nextind)
skip_current && (searchstart = skipfunc(response_str, searchstart))
# Start searching
# First the current response buffer
if 1 <= searchstart <= endof(response_str)
match = searchfunc(response_str, searchdata, searchstart)
if match != 0:-1
seek(response_buffer, first(match) - 1)
return true
end
end
# Now search all the other buffers
idxs = backwards ? ((hist.cur_idx-1):-1:1) : ((hist.cur_idx+1):length(hist.history))
for idx in idxs
h = hist.history[idx]
match = searchfunc(h, searchdata)
if match != 0:-1 && h != response_str && haskey(hist.mode_mapping, hist.modes[idx])
truncate(response_buffer, 0)
write(response_buffer, h)
seek(response_buffer, first(match) - 1)
hist.cur_idx = idx
return true
end
end
return false
end
function history_reset_state(hist::REPLHistoryProvider)
if hist.cur_idx != length(hist.history) + 1
hist.last_idx = hist.cur_idx
hist.cur_idx = length(hist.history) + 1
end
end
LineEdit.reset_state(hist::REPLHistoryProvider) = history_reset_state(hist)
function return_callback(s)
ast = Base.syntax_deprecation_warnings(false) do
Base.parse_input_line(String(take!(copy(LineEdit.buffer(s)))))
end
if !isa(ast, Expr) || (ast.head != :continue && ast.head != :incomplete)
return true
else
return false
end
end
function find_hist_file()
filename = ".julia_history"
if isfile(filename)
return filename
elseif haskey(ENV, "JULIA_HISTORY")
return ENV["JULIA_HISTORY"]
else
return joinpath(homedir(), filename)
end
end
backend(r::AbstractREPL) = r.backendref
send_to_backend(ast, backend::REPLBackendRef) =
send_to_backend(ast, backend.repl_channel, backend.response_channel)
function send_to_backend(ast, req, rep)
put!(req, (ast, 1))
return take!(rep) # (val, bt)
end
function respond(f, repl, main; pass_empty = false)
return function do_respond(s, buf, ok)
if !ok
return transition(s, :abort)
end
line = String(take!(buf))
if !isempty(line) || pass_empty
reset(repl)
local val, bt
try
response = Base.invokelatest(f, line)
val, bt = send_to_backend(response, backend(repl))
catch err
val = err
bt = catch_backtrace()
end
if !ends_with_semicolon(line) || bt !== nothing
print_response(repl, val, bt, true, Base.have_color)
end
end
prepare_next(repl)
reset_state(s)
s.current_mode.sticky || transition(s, main)
end
end
function reset(repl::LineEditREPL)
raw!(repl.t, false)
print(repl.t,Base.text_colors[:normal])
end
function prepare_next(repl::LineEditREPL)
println(terminal(repl))
end
function mode_keymap(julia_prompt::Prompt)
AnyDict(
'\b' => function (s,o...)
if isempty(s) || position(LineEdit.buffer(s)) == 0
buf = copy(LineEdit.buffer(s))
transition(s, julia_prompt) do
LineEdit.state(s, julia_prompt).input_buffer = buf
end
else
LineEdit.edit_backspace(s)
end
end,
"^C" => function (s,o...)
LineEdit.move_input_end(s)
LineEdit.refresh_line(s)
print(LineEdit.terminal(s), "^C\n\n")
transition(s, julia_prompt)
transition(s, :reset)
LineEdit.refresh_line(s)
end)
end
repl_filename(repl, hp::REPLHistoryProvider) = "REPL[$(length(hp.history)-hp.start_idx)]"
repl_filename(repl, hp) = "REPL"
const JL_PROMPT_PASTE = Ref(true)
enable_promptpaste(v::Bool) = JL_PROMPT_PASTE[] = v
function setup_interface(
repl::LineEditREPL;
# those keyword arguments may be deprecated eventually in favor of the Options mechanism
hascolor::Bool = repl.options.hascolor,
extra_repl_keymap::Union{Dict,Vector{<:Dict}} = repl.options.extra_keymap
)
###
#
# This function returns the main interface that describes the REPL
# functionality, it is called internally by functions that setup a
# Terminal-based REPL frontend, but if you want to customize your REPL
# or embed the REPL in another interface, you may call this function
# directly and append it to your interface.
#
# Usage:
#
# repl_channel,response_channel = Channel(),Channel()
# start_repl_backend(repl_channel, response_channel)
# setup_interface(REPLDisplay(t),repl_channel,response_channel)
#
###
###
# We setup the interface in two stages.
# First, we set up all components (prompt,rsearch,shell,help)
# Second, we create keymaps with appropriate transitions between them
# and assign them to the components
#
###
############################### Stage I ################################
# This will provide completions for REPL and help mode
replc = REPLCompletionProvider()
# Set up the main Julia prompt
julia_prompt = Prompt(JULIA_PROMPT;
# Copy colors from the prompt object
prompt_prefix = hascolor ? repl.prompt_color : "",
prompt_suffix = hascolor ?
(repl.envcolors ? Base.input_color : repl.input_color) : "",
repl = repl,
complete = replc,
on_enter = return_callback)
# Setup help mode
help_mode = Prompt("help?> ",
prompt_prefix = hascolor ? repl.help_color : "",
prompt_suffix = hascolor ?
(repl.envcolors ? Base.input_color : repl.input_color) : "",
repl = repl,
complete = replc,
# When we're done transform the entered line into a call to help("$line")
on_done = respond(Docs.helpmode, repl, julia_prompt))
# Set up shell mode
shell_mode = Prompt("shell> ";
prompt_prefix = hascolor ? repl.shell_color : "",
prompt_suffix = hascolor ?
(repl.envcolors ? Base.input_color : repl.input_color) : "",
repl = repl,
complete = ShellCompletionProvider(),
# Transform "foo bar baz" into `foo bar baz` (shell quoting)
# and pass into Base.repl_cmd for processing (handles `ls` and `cd`
# special)
on_done = respond(repl, julia_prompt) do line
Expr(:call, :(Base.repl_cmd),
:(Base.cmd_gen($(Base.shell_parse(line)[1]))),
outstream(repl))
end)
################################# Stage II #############################
# Setup history
# We will have a unified history for all REPL modes
hp = REPLHistoryProvider(Dict{Symbol,Any}(:julia => julia_prompt,
:shell => shell_mode,
:help => help_mode))
if repl.history_file
try
hist_path = find_hist_file()
f = open(hist_path, true, true, true, false, false)
finalizer(replc) do replc
close(f)
end
hist_from_file(hp, f, hist_path)
catch e
print_response(repl, e, catch_backtrace(), true, Base.have_color)
println(outstream(repl))
info("Disabling history file for this session.")
repl.history_file = false
end
end
history_reset_state(hp)
julia_prompt.hist = hp
shell_mode.hist = hp
help_mode.hist = hp
julia_prompt.on_done = respond(x->Base.parse_input_line(x,filename=repl_filename(repl,hp)), repl, julia_prompt)
search_prompt, skeymap = LineEdit.setup_search_keymap(hp)
search_prompt.complete = LatexCompletions()
# Canonicalize user keymap input
if isa(extra_repl_keymap, Dict)
extra_repl_keymap = [extra_repl_keymap]
end
repl_keymap = AnyDict(
';' => function (s,o...)
if isempty(s) || position(LineEdit.buffer(s)) == 0
buf = copy(LineEdit.buffer(s))
transition(s, shell_mode) do
LineEdit.state(s, shell_mode).input_buffer = buf
end
else
edit_insert(s, ';')
end
end,
'?' => function (s,o...)
if isempty(s) || position(LineEdit.buffer(s)) == 0
buf = copy(LineEdit.buffer(s))
transition(s, help_mode) do
LineEdit.state(s, help_mode).input_buffer = buf
end
else
edit_insert(s, '?')
end
end,
# Bracketed Paste Mode
"\e[200~" => (s,o...)->begin
input = LineEdit.bracketed_paste(s) # read directly from s until reaching the end-bracketed-paste marker
sbuffer = LineEdit.buffer(s)
curspos = position(sbuffer)
seek(sbuffer, 0)
shouldeval = (nb_available(sbuffer) == curspos && search(sbuffer, UInt8('\n')) == 0)
seek(sbuffer, curspos)
if curspos == 0
# if pasting at the beginning, strip leading whitespace
input = lstrip(input)
end
if !shouldeval
# when pasting in the middle of input, just paste in place
# don't try to execute all the WIP, since that's rather confusing
# and is often ill-defined how it should behave
edit_insert(s, input)
return
end
LineEdit.push_undo(s)
edit_insert(sbuffer, input)
input = String(take!(sbuffer))
oldpos = start(input)
firstline = true
isprompt_paste = false
while !done(input, oldpos) # loop until all lines have been executed
if JL_PROMPT_PASTE[]
# Check if the next statement starts with "julia> ", in that case
# skip it. But first skip whitespace
while input[oldpos] in ('\n', ' ', '\t')
oldpos = nextind(input, oldpos)
oldpos >= sizeof(input) && return
end
# Check if input line starts with "julia> ", remove it if we are in prompt paste mode
jl_prompt_len = 7
if (firstline || isprompt_paste) && startswith(SubString(input, oldpos), JULIA_PROMPT)
isprompt_paste = true
oldpos += jl_prompt_len
# If we are prompt pasting and current statement does not begin with julia> , skip to next line
elseif isprompt_paste
while input[oldpos] != '\n'
oldpos = nextind(input, oldpos)
oldpos >= sizeof(input) && return
end
continue
end
end
ast, pos = Base.syntax_deprecation_warnings(false) do
Meta.parse(input, oldpos, raise=false)
end
if (isa(ast, Expr) && (ast.head == :error || ast.head == :continue || ast.head == :incomplete)) ||
(done(input, pos) && !endswith(input, '\n'))
# remaining text is incomplete (an error, or parser ran to the end but didn't stop with a newline):
# Insert all the remaining text as one line (might be empty)
tail = input[oldpos:end]
if !firstline
# strip leading whitespace, but only if it was the result of executing something
# (avoids modifying the user's current leading wip line)
tail = lstrip(tail)
end
if isprompt_paste # remove indentation spaces corresponding to the prompt
tail = replace(tail, r"^ {7}"m, "") # 7: jl_prompt_len
end
LineEdit.replace_line(s, tail, true)
LineEdit.refresh_line(s)
break
end
# get the line and strip leading and trailing whitespace
line = strip(input[oldpos:prevind(input, pos)])
if !isempty(line)
if isprompt_paste # remove indentation spaces corresponding to the prompt
line = replace(line, r"^ {7}"m, "") # 7: jl_prompt_len
end
# put the line on the screen and history
LineEdit.replace_line(s, line)
LineEdit.commit_line(s)
# execute the statement
terminal = LineEdit.terminal(s) # This is slightly ugly but ok for now
raw!(terminal, false) && disable_bracketed_paste(terminal)
LineEdit.mode(s).on_done(s, LineEdit.buffer(s), true)
raw!(terminal, true) && enable_bracketed_paste(terminal)
LineEdit.push_undo(s) # when the last line is incomplete
end
oldpos = pos
firstline = false
end
end,
# Open the editor at the location of a stackframe or method
# This is accessing a global variable that gets set in
# the show_backtrace and show_method_table functions.
"^Q" => (s, o...) -> begin
linfos = Base.LAST_SHOWN_LINE_INFOS
str = String(take!(LineEdit.buffer(s)))
n = tryparse(Int, str)
isnull(n) && @goto writeback
n = get(n)
if n <= 0 || n > length(linfos) || startswith(linfos[n][1], "./REPL")
@goto writeback
end
Base.edit(linfos[n][1], linfos[n][2])
Base.LineEdit.refresh_line(s)
return
@label writeback
write(Base.LineEdit.buffer(s), str)
return
end,
)
prefix_prompt, prefix_keymap = LineEdit.setup_prefix_keymap(hp, julia_prompt)
a = Dict{Any,Any}[skeymap, repl_keymap, prefix_keymap, LineEdit.history_keymap, LineEdit.default_keymap, LineEdit.escape_defaults]
prepend!(a, extra_repl_keymap)
julia_prompt.keymap_dict = LineEdit.keymap(a)
mk = mode_keymap(julia_prompt)
b = Dict{Any,Any}[skeymap, mk, prefix_keymap, LineEdit.history_keymap, LineEdit.default_keymap, LineEdit.escape_defaults]
prepend!(b, extra_repl_keymap)
shell_mode.keymap_dict = help_mode.keymap_dict = LineEdit.keymap(b)
ModalInterface([julia_prompt, shell_mode, help_mode, search_prompt, prefix_prompt])
end
function run_frontend(repl::LineEditREPL, backend::REPLBackendRef)
d = REPLDisplay(repl)
dopushdisplay = repl.specialdisplay === nothing && !in(d,Base.Multimedia.displays)
dopushdisplay && pushdisplay(d)
if !isdefined(repl,:interface)
interface = repl.interface = setup_interface(repl)
else
interface = repl.interface
end
repl.backendref = backend
run_interface(repl.t, interface)
dopushdisplay && popdisplay(d)
end
if isdefined(Base, :banner_color)
banner(io, t) = banner(io, hascolor(t))
banner(io, x::Bool) = print(io, x ? Base.banner_color : Base.banner_plain)
else
banner(io,t) = Base.banner(io)
end
## StreamREPL ##