-
Notifications
You must be signed in to change notification settings - Fork 1.6k
/
InputHandler.ts
2247 lines (2096 loc) · 83.5 KB
/
InputHandler.ts
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
/**
* Copyright (c) 2014 The xterm.js authors. All rights reserved.
* Copyright (c) 2012-2013, Christopher Jeffrey (MIT License)
* @license MIT
*/
import { IInputHandler, IInputHandlingTerminal } from './Types';
import { C0, C1 } from 'common/data/EscapeSequences';
import { CHARSETS, DEFAULT_CHARSET } from 'common/data/Charsets';
import { wcwidth } from 'common/CharWidth';
import { EscapeSequenceParser } from 'common/parser/EscapeSequenceParser';
import { Disposable } from 'common/Lifecycle';
import { concat } from 'common/TypedArrayUtils';
import { StringToUtf32, stringFromCodePoint, utf32ToString, Utf8ToUtf32 } from 'common/input/TextDecoder';
import { DEFAULT_ATTR_DATA } from 'common/buffer/BufferLine';
import { EventEmitter, IEvent } from 'common/EventEmitter';
import { IParsingState, IDcsHandler, IEscapeSequenceParser, IParams, IFunctionIdentifier } from 'common/parser/Types';
import { NULL_CELL_CODE, NULL_CELL_WIDTH, Attributes, FgFlags, BgFlags, Content } from 'common/buffer/Constants';
import { CellData } from 'common/buffer/CellData';
import { AttributeData } from 'common/buffer/AttributeData';
import { IAttributeData, IDisposable } from 'common/Types';
import { ICoreService, IBufferService, IOptionsService, ILogService, IDirtyRowService, ICoreMouseService } from 'common/services/Services';
import { OscHandler } from 'common/parser/OscParser';
import { DcsHandler } from 'common/parser/DcsParser';
/**
* Map collect to glevel. Used in `selectCharset`.
*/
const GLEVEL: {[key: string]: number} = {'(': 0, ')': 1, '*': 2, '+': 3, '-': 1, '.': 2};
/**
* Max length of the UTF32 input buffer. Real memory consumption is 4 times higher.
*/
const MAX_PARSEBUFFER_LENGTH = 131072;
/**
* DCS subparser implementations
*/
/**
* DCS $ q Pt ST
* DECRQSS (https://vt100.net/docs/vt510-rm/DECRQSS.html)
* Request Status String (DECRQSS), VT420 and up.
* Response: DECRPSS (https://vt100.net/docs/vt510-rm/DECRPSS.html)
*/
class DECRQSS implements IDcsHandler {
private _data: Uint32Array = new Uint32Array(0);
constructor(
private _bufferService: IBufferService,
private _coreService: ICoreService,
private _logService: ILogService,
private _optionsService: IOptionsService
) { }
hook(params: IParams): void {
this._data = new Uint32Array(0);
}
put(data: Uint32Array, start: number, end: number): void {
this._data = concat(this._data, data.subarray(start, end));
}
unhook(success: boolean): void {
if (!success) {
this._data = new Uint32Array(0);
return;
}
const data = utf32ToString(this._data);
this._data = new Uint32Array(0);
switch (data) {
// valid: DCS 1 $ r Pt ST (xterm)
case '"q': // DECSCA
return this._coreService.triggerDataEvent(`${C0.ESC}P1$r0"q${C0.ESC}\\`);
case '"p': // DECSCL
return this._coreService.triggerDataEvent(`${C0.ESC}P1$r61"p${C0.ESC}\\`);
case 'r': // DECSTBM
const pt = '' + (this._bufferService.buffer.scrollTop + 1) +
';' + (this._bufferService.buffer.scrollBottom + 1) + 'r';
return this._coreService.triggerDataEvent(`${C0.ESC}P1$r${pt}${C0.ESC}\\`);
case 'm': // SGR
// TODO: report real settings instead of 0m
return this._coreService.triggerDataEvent(`${C0.ESC}P1$r0m${C0.ESC}\\`);
case ' q': // DECSCUSR
const STYLES: {[key: string]: number} = {'block': 2, 'underline': 4, 'bar': 6};
let style = STYLES[this._optionsService.options.cursorStyle];
style -= this._optionsService.options.cursorBlink ? 1 : 0;
return this._coreService.triggerDataEvent(`${C0.ESC}P1$r${style} q${C0.ESC}\\`);
default:
// invalid: DCS 0 $ r Pt ST (xterm)
this._logService.debug('Unknown DCS $q %s', data);
this._coreService.triggerDataEvent(`${C0.ESC}P0$r${C0.ESC}\\`);
}
}
}
/**
* DCS Ps; Ps| Pt ST
* DECUDK (https://vt100.net/docs/vt510-rm/DECUDK.html)
* not supported
*/
/**
* DCS + q Pt ST (xterm)
* Request Terminfo String
* not implemented
*/
/**
* DCS + p Pt ST (xterm)
* Set Terminfo Data
* not supported
*/
/**
* The terminal's standard implementation of IInputHandler, this handles all
* input from the Parser.
*
* Refer to http://invisible-island.net/xterm/ctlseqs/ctlseqs.html to understand
* each function's header comment.
*/
export class InputHandler extends Disposable implements IInputHandler {
private _parseBuffer: Uint32Array = new Uint32Array(4096);
private _stringDecoder: StringToUtf32 = new StringToUtf32();
private _utf8Decoder: Utf8ToUtf32 = new Utf8ToUtf32();
private _workCell: CellData = new CellData();
private _onCursorMove = new EventEmitter<void>();
public get onCursorMove(): IEvent<void> { return this._onCursorMove.event; }
private _onLineFeed = new EventEmitter<void>();
public get onLineFeed(): IEvent<void> { return this._onLineFeed.event; }
private _onScroll = new EventEmitter<number>();
public get onScroll(): IEvent<number> { return this._onScroll.event; }
constructor(
protected _terminal: IInputHandlingTerminal,
private readonly _bufferService: IBufferService,
private readonly _coreService: ICoreService,
private readonly _dirtyRowService: IDirtyRowService,
private readonly _logService: ILogService,
private readonly _optionsService: IOptionsService,
private readonly _coreMouseService: ICoreMouseService,
private readonly _parser: IEscapeSequenceParser = new EscapeSequenceParser())
{
super();
this.register(this._parser);
/**
* custom fallback handlers
*/
this._parser.setCsiHandlerFallback((ident, params) => {
this._logService.debug('Unknown CSI code: ', { identifier: this._parser.identToString(ident), params: params.toArray() });
});
this._parser.setEscHandlerFallback(ident => {
this._logService.debug('Unknown ESC code: ', { identifier: this._parser.identToString(ident) });
});
this._parser.setExecuteHandlerFallback(code => {
this._logService.debug('Unknown EXECUTE code: ', { code });
});
this._parser.setOscHandlerFallback((identifier, action, data) => {
this._logService.debug('Unknown OSC code: ', { identifier, action, data });
});
this._parser.setDcsHandlerFallback((ident, action, payload) => {
if (action === 'HOOK') {
payload = payload.toArray();
}
this._logService.debug('Unknown DCS code: ', { identifier: this._parser.identToString(ident), action, payload });
});
/**
* print handler
*/
this._parser.setPrintHandler((data, start, end) => this.print(data, start, end));
/**
* CSI handler
*/
this._parser.setCsiHandler({final: '@'}, params => this.insertChars(params));
this._parser.setCsiHandler({intermediates: ' ', final: '@'}, params => this.scrollLeft(params));
this._parser.setCsiHandler({final: 'A'}, params => this.cursorUp(params));
this._parser.setCsiHandler({intermediates: ' ', final: 'A'}, params => this.scrollRight(params));
this._parser.setCsiHandler({final: 'B'}, params => this.cursorDown(params));
this._parser.setCsiHandler({final: 'C'}, params => this.cursorForward(params));
this._parser.setCsiHandler({final: 'D'}, params => this.cursorBackward(params));
this._parser.setCsiHandler({final: 'E'}, params => this.cursorNextLine(params));
this._parser.setCsiHandler({final: 'F'}, params => this.cursorPrecedingLine(params));
this._parser.setCsiHandler({final: 'G'}, params => this.cursorCharAbsolute(params));
this._parser.setCsiHandler({final: 'H'}, params => this.cursorPosition(params));
this._parser.setCsiHandler({final: 'I'}, params => this.cursorForwardTab(params));
this._parser.setCsiHandler({final: 'J'}, params => this.eraseInDisplay(params));
this._parser.setCsiHandler({prefix: '?', final: 'J'}, params => this.eraseInDisplay(params));
this._parser.setCsiHandler({final: 'K'}, params => this.eraseInLine(params));
this._parser.setCsiHandler({prefix: '?', final: 'K'}, params => this.eraseInLine(params));
this._parser.setCsiHandler({final: 'L'}, params => this.insertLines(params));
this._parser.setCsiHandler({final: 'M'}, params => this.deleteLines(params));
this._parser.setCsiHandler({final: 'P'}, params => this.deleteChars(params));
this._parser.setCsiHandler({final: 'S'}, params => this.scrollUp(params));
this._parser.setCsiHandler({final: 'T'}, params => this.scrollDown(params));
this._parser.setCsiHandler({final: 'X'}, params => this.eraseChars(params));
this._parser.setCsiHandler({final: 'Z'}, params => this.cursorBackwardTab(params));
this._parser.setCsiHandler({final: '`'}, params => this.charPosAbsolute(params));
this._parser.setCsiHandler({final: 'a'}, params => this.hPositionRelative(params));
this._parser.setCsiHandler({final: 'b'}, params => this.repeatPrecedingCharacter(params));
this._parser.setCsiHandler({final: 'c'}, params => this.sendDeviceAttributesPrimary(params));
this._parser.setCsiHandler({prefix: '>', final: 'c'}, params => this.sendDeviceAttributesSecondary(params));
this._parser.setCsiHandler({final: 'd'}, params => this.linePosAbsolute(params));
this._parser.setCsiHandler({final: 'e'}, params => this.vPositionRelative(params));
this._parser.setCsiHandler({final: 'f'}, params => this.hVPosition(params));
this._parser.setCsiHandler({final: 'g'}, params => this.tabClear(params));
this._parser.setCsiHandler({final: 'h'}, params => this.setMode(params));
this._parser.setCsiHandler({prefix: '?', final: 'h'}, params => this.setModePrivate(params));
this._parser.setCsiHandler({final: 'l'}, params => this.resetMode(params));
this._parser.setCsiHandler({prefix: '?', final: 'l'}, params => this.resetModePrivate(params));
this._parser.setCsiHandler({final: 'm'}, params => this.charAttributes(params));
this._parser.setCsiHandler({final: 'n'}, params => this.deviceStatus(params));
this._parser.setCsiHandler({prefix: '?', final: 'n'}, params => this.deviceStatusPrivate(params));
this._parser.setCsiHandler({intermediates: '!', final: 'p'}, params => this.softReset(params));
this._parser.setCsiHandler({intermediates: ' ', final: 'q'}, params => this.setCursorStyle(params));
this._parser.setCsiHandler({final: 'r'}, params => this.setScrollRegion(params));
this._parser.setCsiHandler({final: 's'}, params => this.saveCursor(params));
this._parser.setCsiHandler({final: 'u'}, params => this.restoreCursor(params));
this._parser.setCsiHandler({intermediates: '\'', final: '}'}, params => this.insertColumns(params));
this._parser.setCsiHandler({intermediates: '\'', final: '~'}, params => this.deleteColumns(params));
/**
* execute handler
*/
this._parser.setExecuteHandler(C0.BEL, () => this.bell());
this._parser.setExecuteHandler(C0.LF, () => this.lineFeed());
this._parser.setExecuteHandler(C0.VT, () => this.lineFeed());
this._parser.setExecuteHandler(C0.FF, () => this.lineFeed());
this._parser.setExecuteHandler(C0.CR, () => this.carriageReturn());
this._parser.setExecuteHandler(C0.BS, () => this.backspace());
this._parser.setExecuteHandler(C0.HT, () => this.tab());
this._parser.setExecuteHandler(C0.SO, () => this.shiftOut());
this._parser.setExecuteHandler(C0.SI, () => this.shiftIn());
// FIXME: What do to with missing? Old code just added those to print.
this._parser.setExecuteHandler(C1.IND, () => this.index());
this._parser.setExecuteHandler(C1.NEL, () => this.nextLine());
this._parser.setExecuteHandler(C1.HTS, () => this.tabSet());
/**
* OSC handler
*/
// 0 - icon name + title
this._parser.setOscHandler(0, new OscHandler((data: string) => this.setTitle(data)));
// 1 - icon name
// 2 - title
this._parser.setOscHandler(2, new OscHandler((data: string) => this.setTitle(data)));
// 3 - set property X in the form "prop=value"
// 4 - Change Color Number
// 5 - Change Special Color Number
// 6 - Enable/disable Special Color Number c
// 7 - current directory? (not in xterm spec, see https://gitlab.com/gnachman/iterm2/issues/3939)
// 10 - Change VT100 text foreground color to Pt.
// 11 - Change VT100 text background color to Pt.
// 12 - Change text cursor color to Pt.
// 13 - Change mouse foreground color to Pt.
// 14 - Change mouse background color to Pt.
// 15 - Change Tektronix foreground color to Pt.
// 16 - Change Tektronix background color to Pt.
// 17 - Change highlight background color to Pt.
// 18 - Change Tektronix cursor color to Pt.
// 19 - Change highlight foreground color to Pt.
// 46 - Change Log File to Pt.
// 50 - Set Font to Pt.
// 51 - reserved for Emacs shell.
// 52 - Manipulate Selection Data.
// 104 ; c - Reset Color Number c.
// 105 ; c - Reset Special Color Number c.
// 106 ; c; f - Enable/disable Special Color Number c.
// 110 - Reset VT100 text foreground color.
// 111 - Reset VT100 text background color.
// 112 - Reset text cursor color.
// 113 - Reset mouse foreground color.
// 114 - Reset mouse background color.
// 115 - Reset Tektronix foreground color.
// 116 - Reset Tektronix background color.
// 117 - Reset highlight color.
// 118 - Reset Tektronix cursor color.
// 119 - Reset highlight foreground color.
/**
* ESC handlers
*/
this._parser.setEscHandler({final: '7'}, () => this.saveCursor());
this._parser.setEscHandler({final: '8'}, () => this.restoreCursor());
this._parser.setEscHandler({final: 'D'}, () => this.index());
this._parser.setEscHandler({final: 'E'}, () => this.nextLine());
this._parser.setEscHandler({final: 'H'}, () => this.tabSet());
this._parser.setEscHandler({final: 'M'}, () => this.reverseIndex());
this._parser.setEscHandler({final: '='}, () => this.keypadApplicationMode());
this._parser.setEscHandler({final: '>'}, () => this.keypadNumericMode());
this._parser.setEscHandler({final: 'c'}, () => this.reset());
this._parser.setEscHandler({final: 'n'}, () => this.setgLevel(2));
this._parser.setEscHandler({final: 'o'}, () => this.setgLevel(3));
this._parser.setEscHandler({final: '|'}, () => this.setgLevel(3));
this._parser.setEscHandler({final: '}'}, () => this.setgLevel(2));
this._parser.setEscHandler({final: '~'}, () => this.setgLevel(1));
this._parser.setEscHandler({intermediates: '%', final: '@'}, () => this.selectDefaultCharset());
this._parser.setEscHandler({intermediates: '%', final: 'G'}, () => this.selectDefaultCharset());
for (const flag in CHARSETS) {
this._parser.setEscHandler({intermediates: '(', final: flag}, () => this.selectCharset('(' + flag));
this._parser.setEscHandler({intermediates: ')', final: flag}, () => this.selectCharset(')' + flag));
this._parser.setEscHandler({intermediates: '*', final: flag}, () => this.selectCharset('*' + flag));
this._parser.setEscHandler({intermediates: '+', final: flag}, () => this.selectCharset('+' + flag));
this._parser.setEscHandler({intermediates: '-', final: flag}, () => this.selectCharset('-' + flag));
this._parser.setEscHandler({intermediates: '.', final: flag}, () => this.selectCharset('.' + flag));
this._parser.setEscHandler({intermediates: '/', final: flag}, () => this.selectCharset('/' + flag)); // TODO: supported?
}
this._parser.setEscHandler({intermediates: '#', final: '8'}, () => this.screenAlignmentPattern());
/**
* error handler
*/
this._parser.setErrorHandler((state: IParsingState) => {
this._logService.error('Parsing error: ', state);
return state;
});
/**
* DCS handler
*/
this._parser.setDcsHandler({intermediates: '$', final: 'q'}, new DECRQSS(this._bufferService, this._coreService, this._logService, this._optionsService));
}
public dispose(): void {
super.dispose();
}
public parse(data: string | Uint8Array): void {
let buffer = this._bufferService.buffer;
const cursorStartX = buffer.x;
const cursorStartY = buffer.y;
this._logService.debug('parsing data', data);
// resize input buffer if needed
if (this._parseBuffer.length < data.length) {
if (this._parseBuffer.length < MAX_PARSEBUFFER_LENGTH) {
this._parseBuffer = new Uint32Array(Math.min(data.length, MAX_PARSEBUFFER_LENGTH));
}
}
// Clear the dirty row service so we know which lines changed as a result of parsing
this._dirtyRowService.clearRange();
// process big data in smaller chunks
if (data.length > MAX_PARSEBUFFER_LENGTH) {
for (let i = 0; i < data.length; i += MAX_PARSEBUFFER_LENGTH) {
const end = i + MAX_PARSEBUFFER_LENGTH < data.length ? i + MAX_PARSEBUFFER_LENGTH : data.length;
const len = (typeof data === 'string')
? this._stringDecoder.decode(data.substring(i, end), this._parseBuffer)
: this._utf8Decoder.decode(data.subarray(i, end), this._parseBuffer);
this._parser.parse(this._parseBuffer, len);
}
} else {
const len = (typeof data === 'string')
? this._stringDecoder.decode(data, this._parseBuffer)
: this._utf8Decoder.decode(data, this._parseBuffer);
this._parser.parse(this._parseBuffer, len);
}
buffer = this._bufferService.buffer;
if (buffer.x !== cursorStartX || buffer.y !== cursorStartY) {
this._onCursorMove.fire();
}
// Refresh any dirty rows accumulated as part of parsing
this._terminal.refresh(this._dirtyRowService.start, this._dirtyRowService.end);
}
public print(data: Uint32Array, start: number, end: number): void {
let code: number;
let chWidth: number;
const buffer = this._bufferService.buffer;
const charset = this._terminal.charset;
const screenReaderMode = this._optionsService.options.screenReaderMode;
const cols = this._bufferService.cols;
const wraparoundMode = this._terminal.wraparoundMode;
const insertMode = this._terminal.insertMode;
const curAttr = this._terminal.curAttrData;
let bufferRow = buffer.lines.get(buffer.y + buffer.ybase);
this._dirtyRowService.markDirty(buffer.y);
for (let pos = start; pos < end; ++pos) {
code = data[pos];
// calculate print space
// expensive call, therefore we save width in line buffer
chWidth = wcwidth(code);
// get charset replacement character
// charset is only defined for ASCII, therefore we only
// search for an replacement char if code < 127
if (code < 127 && charset) {
const ch = charset[String.fromCharCode(code)];
if (ch) {
code = ch.charCodeAt(0);
}
}
if (screenReaderMode) {
this._terminal.onA11yCharEmitter.fire(stringFromCodePoint(code));
}
// insert combining char at last cursor position
// FIXME: needs handling after cursor jumps
// buffer.x should never be 0 for a combining char
// since they always follow a cell consuming char
// therefore we can test for buffer.x to avoid overflow left
if (!chWidth && buffer.x) {
if (!bufferRow.getWidth(buffer.x - 1)) {
// found empty cell after fullwidth, need to go 2 cells back
// it is save to step 2 cells back here
// since an empty cell is only set by fullwidth chars
bufferRow.addCodepointToCell(buffer.x - 2, code);
} else {
bufferRow.addCodepointToCell(buffer.x - 1, code);
}
continue;
}
// goto next line if ch would overflow
// TODO: needs a global min terminal width of 2
// FIXME: additionally ensure chWidth fits into a line
// --> maybe forbid cols<xy at higher level as it would
// introduce a bad runtime penalty here
if (buffer.x + chWidth - 1 >= cols) {
// autowrap - DECAWM
// automatically wraps to the beginning of the next line
if (wraparoundMode) {
buffer.x = 0;
buffer.y++;
if (buffer.y === buffer.scrollBottom + 1) {
buffer.y--;
this._terminal.scroll(true);
} else {
if (buffer.y >= this._bufferService.rows) {
buffer.y = this._bufferService.rows - 1;
}
// The line already exists (eg. the initial viewport), mark it as a
// wrapped line
buffer.lines.get(buffer.y).isWrapped = true;
}
// row changed, get it again
bufferRow = buffer.lines.get(buffer.y + buffer.ybase);
} else {
buffer.x = cols - 1;
if (chWidth === 2) {
// FIXME: check for xterm behavior
// What to do here? We got a wide char that does not fit into last cell
continue;
}
}
}
// insert mode: move characters to right
if (insertMode) {
// right shift cells according to the width
bufferRow.insertCells(buffer.x, chWidth, buffer.getNullCell(curAttr));
// test last cell - since the last cell has only room for
// a halfwidth char any fullwidth shifted there is lost
// and will be set to empty cell
if (bufferRow.getWidth(cols - 1) === 2) {
bufferRow.setCellFromCodePoint(cols - 1, NULL_CELL_CODE, NULL_CELL_WIDTH, curAttr.fg, curAttr.bg);
}
}
// write current char to buffer and advance cursor
bufferRow.setCellFromCodePoint(buffer.x++, code, chWidth, curAttr.fg, curAttr.bg);
// fullwidth char - also set next cell to placeholder stub and advance cursor
// for graphemes bigger than fullwidth we can simply loop to zero
// we already made sure above, that buffer.x + chWidth will not overflow right
if (chWidth > 0) {
while (--chWidth) {
// other than a regular empty cell a cell following a wide char has no width
bufferRow.setCellFromCodePoint(buffer.x++, 0, 0, curAttr.fg, curAttr.bg);
}
}
}
// store last char in Parser.precedingCodepoint for REP to work correctly
// This needs to check whether:
// - fullwidth + surrogates: reset
// - combining: only base char gets carried on (bug in xterm?)
if (end) {
bufferRow.loadCell(buffer.x - 1, this._workCell);
if (this._workCell.getWidth() === 2 || this._workCell.getCode() > 0xFFFF) {
this._parser.precedingCodepoint = 0;
} else if (this._workCell.isCombined()) {
this._parser.precedingCodepoint = this._workCell.getChars().charCodeAt(0);
} else {
this._parser.precedingCodepoint = this._workCell.content;
}
}
this._dirtyRowService.markDirty(buffer.y);
}
/**
* Forward addCsiHandler from parser.
*/
public addCsiHandler(id: IFunctionIdentifier, callback: (params: IParams) => boolean): IDisposable {
return this._parser.addCsiHandler(id, callback);
}
/**
* Forward addDcsHandler from parser.
*/
public addDcsHandler(id: IFunctionIdentifier, callback: (data: string, param: IParams) => boolean): IDisposable {
return this._parser.addDcsHandler(id, new DcsHandler(callback));
}
/**
* Forward addEscHandler from parser.
*/
public addEscHandler(id: IFunctionIdentifier, callback: () => boolean): IDisposable {
return this._parser.addEscHandler(id, callback);
}
/**
* Forward addOscHandler from parser.
*/
public addOscHandler(ident: number, callback: (data: string) => boolean): IDisposable {
return this._parser.addOscHandler(ident, new OscHandler(callback));
}
/**
* BEL
* Bell (Ctrl-G).
*/
public bell(): void {
this._terminal.bell();
}
/**
* LF
* Line Feed or New Line (NL). (LF is Ctrl-J).
*/
public lineFeed(): void {
// make buffer local for faster access
const buffer = this._bufferService.buffer;
if (this._optionsService.options.convertEol) {
buffer.x = 0;
}
buffer.y++;
if (buffer.y === buffer.scrollBottom + 1) {
buffer.y--;
this._terminal.scroll();
} else if (buffer.y >= this._bufferService.rows) {
buffer.y = this._bufferService.rows - 1;
}
// If the end of the line is hit, prevent this action from wrapping around to the next line.
if (buffer.x >= this._bufferService.cols) {
buffer.x--;
}
this._onLineFeed.fire();
}
/**
* CR
* Carriage Return (Ctrl-M).
*/
public carriageReturn(): void {
this._bufferService.buffer.x = 0;
}
/**
* BS
* Backspace (Ctrl-H).
*/
public backspace(): void {
this._restrictCursor();
if (this._bufferService.buffer.x > 0) {
this._bufferService.buffer.x--;
}
}
/**
* TAB
* Horizontal Tab (HT) (Ctrl-I).
*/
public tab(): void {
if (this._bufferService.buffer.x >= this._bufferService.cols) {
return;
}
const originalX = this._bufferService.buffer.x;
this._bufferService.buffer.x = this._bufferService.buffer.nextStop();
if (this._optionsService.options.screenReaderMode) {
this._terminal.onA11yTabEmitter.fire(this._bufferService.buffer.x - originalX);
}
}
/**
* SO
* Shift Out (Ctrl-N) -> Switch to Alternate Character Set. This invokes the
* G1 character set.
*/
public shiftOut(): void {
this._terminal.setgLevel(1);
}
/**
* SI
* Shift In (Ctrl-O) -> Switch to Standard Character Set. This invokes the G0
* character set (the default).
*/
public shiftIn(): void {
this._terminal.setgLevel(0);
}
/**
* Restrict cursor to viewport size / scroll margin (origin mode).
*/
private _restrictCursor(): void {
this._bufferService.buffer.x = Math.min(this._bufferService.cols - 1, Math.max(0, this._bufferService.buffer.x));
this._bufferService.buffer.y = this._terminal.originMode
? Math.min(this._bufferService.buffer.scrollBottom, Math.max(this._bufferService.buffer.scrollTop, this._bufferService.buffer.y))
: Math.min(this._bufferService.rows - 1, Math.max(0, this._bufferService.buffer.y));
}
/**
* Set absolute cursor position.
*/
private _setCursor(x: number, y: number): void {
if (this._terminal.originMode) {
this._bufferService.buffer.x = x;
this._bufferService.buffer.y = this._bufferService.buffer.scrollTop + y;
} else {
this._bufferService.buffer.x = x;
this._bufferService.buffer.y = y;
}
this._restrictCursor();
}
/**
* Set relative cursor position.
*/
private _moveCursor(x: number, y: number): void {
// for relative changes we have to make sure we are within 0 .. cols/rows - 1
// before calculating the new position
this._restrictCursor();
this._setCursor(this._bufferService.buffer.x + x, this._bufferService.buffer.y + y);
}
/**
* CSI Ps A
* Cursor Up Ps Times (default = 1) (CUU).
*/
public cursorUp(params: IParams): void {
// stop at scrollTop
const diffToTop = this._bufferService.buffer.y - this._bufferService.buffer.scrollTop;
if (diffToTop >= 0) {
this._moveCursor(0, -Math.min(diffToTop, params.params[0] || 1));
} else {
this._moveCursor(0, -(params.params[0] || 1));
}
}
/**
* CSI Ps B
* Cursor Down Ps Times (default = 1) (CUD).
*/
public cursorDown(params: IParams): void {
// stop at scrollBottom
const diffToBottom = this._bufferService.buffer.scrollBottom - this._bufferService.buffer.y;
if (diffToBottom >= 0) {
this._moveCursor(0, Math.min(diffToBottom, params.params[0] || 1));
} else {
this._moveCursor(0, params.params[0] || 1);
}
}
/**
* CSI Ps C
* Cursor Forward Ps Times (default = 1) (CUF).
*/
public cursorForward(params: IParams): void {
this._moveCursor(params.params[0] || 1, 0);
}
/**
* CSI Ps D
* Cursor Backward Ps Times (default = 1) (CUB).
*/
public cursorBackward(params: IParams): void {
this._moveCursor(-(params.params[0] || 1), 0);
}
/**
* CSI Ps E
* Cursor Next Line Ps Times (default = 1) (CNL).
* Other than cursorDown (CUD) also set the cursor to first column.
*/
public cursorNextLine(params: IParams): void {
this.cursorDown(params);
this._bufferService.buffer.x = 0;
}
/**
* CSI Ps F
* Cursor Previous Line Ps Times (default = 1) (CPL).
* Other than cursorUp (CUU) also set the cursor to first column.
*/
public cursorPrecedingLine(params: IParams): void {
this.cursorUp(params);
this._bufferService.buffer.x = 0;
}
/**
* CSI Ps G
* Cursor Character Absolute [column] (default = [row,1]) (CHA).
*/
public cursorCharAbsolute(params: IParams): void {
this._setCursor((params.params[0] || 1) - 1, this._bufferService.buffer.y);
}
/**
* CSI Ps ; Ps H
* Cursor Position [row;column] (default = [1,1]) (CUP).
*/
public cursorPosition(params: IParams): void {
this._setCursor(
// col
(params.length >= 2) ? (params.params[1] || 1) - 1 : 0,
// row
(params.params[0] || 1) - 1);
}
/**
* CSI Pm ` Character Position Absolute
* [column] (default = [row,1]) (HPA).
* Currently same functionality as CHA.
*/
public charPosAbsolute(params: IParams): void {
this._setCursor((params.params[0] || 1) - 1, this._bufferService.buffer.y);
}
/**
* CSI Pm a Character Position Relative
* [columns] (default = [row,col+1]) (HPR)
* Currently same functionality as CUF.
*/
public hPositionRelative(params: IParams): void {
this._moveCursor(params.params[0] || 1, 0);
}
/**
* CSI Pm d Vertical Position Absolute (VPA)
* [row] (default = [1,column])
*/
public linePosAbsolute(params: IParams): void {
this._setCursor(this._bufferService.buffer.x, (params.params[0] || 1) - 1);
}
/**
* CSI Pm e Vertical Position Relative (VPR)
* [rows] (default = [row+1,column])
* reuse CSI Ps B ?
*/
public vPositionRelative(params: IParams): void {
this._moveCursor(0, params.params[0] || 1);
}
/**
* CSI Ps ; Ps f
* Horizontal and Vertical Position [row;column] (default =
* [1,1]) (HVP).
* Same as CUP.
*/
public hVPosition(params: IParams): void {
this.cursorPosition(params);
}
/**
* CSI Ps g Tab Clear (TBC).
* Ps = 0 -> Clear Current Column (default).
* Ps = 3 -> Clear All.
* Potentially:
* Ps = 2 -> Clear Stops on Line.
* http://vt100.net/annarbor/aaa-ug/section6.html
*/
public tabClear(params: IParams): void {
const param = params.params[0];
if (param === 0) {
delete this._bufferService.buffer.tabs[this._bufferService.buffer.x];
} else if (param === 3) {
this._bufferService.buffer.tabs = {};
}
}
/**
* CSI Ps I
* Cursor Forward Tabulation Ps tab stops (default = 1) (CHT).
*/
public cursorForwardTab(params: IParams): void {
if (this._bufferService.buffer.x >= this._bufferService.cols) {
return;
}
let param = params.params[0] || 1;
while (param--) {
this._bufferService.buffer.x = this._bufferService.buffer.nextStop();
}
}
/**
* CSI Ps Z Cursor Backward Tabulation Ps tab stops (default = 1) (CBT).
*/
public cursorBackwardTab(params: IParams): void {
if (this._bufferService.buffer.x >= this._bufferService.cols) {
return;
}
let param = params.params[0] || 1;
// make buffer local for faster access
const buffer = this._bufferService.buffer;
while (param--) {
buffer.x = buffer.prevStop();
}
}
/**
* Helper method to erase cells in a terminal row.
* The cell gets replaced with the eraseChar of the terminal.
* @param y row index
* @param start first cell index to be erased
* @param end end - 1 is last erased cell
*/
private _eraseInBufferLine(y: number, start: number, end: number, clearWrap: boolean = false): void {
const line = this._bufferService.buffer.lines.get(this._bufferService.buffer.ybase + y);
line.replaceCells(
start,
end,
this._bufferService.buffer.getNullCell(this._terminal.eraseAttrData())
);
if (clearWrap) {
line.isWrapped = false;
}
}
/**
* Helper method to reset cells in a terminal row.
* The cell gets replaced with the eraseChar of the terminal and the isWrapped property is set to false.
* @param y row index
*/
private _resetBufferLine(y: number): void {
const line = this._bufferService.buffer.lines.get(this._bufferService.buffer.ybase + y);
line.fill(this._bufferService.buffer.getNullCell(this._terminal.eraseAttrData()));
line.isWrapped = false;
}
/**
* CSI Ps J Erase in Display (ED).
* Ps = 0 -> Erase Below (default).
* Ps = 1 -> Erase Above.
* Ps = 2 -> Erase All.
* Ps = 3 -> Erase Saved Lines (xterm).
* CSI ? Ps J
* Erase in Display (DECSED).
* Ps = 0 -> Selective Erase Below (default).
* Ps = 1 -> Selective Erase Above.
* Ps = 2 -> Selective Erase All.
*/
public eraseInDisplay(params: IParams): void {
this._restrictCursor();
let j;
switch (params.params[0]) {
case 0:
j = this._bufferService.buffer.y;
this._dirtyRowService.markDirty(j);
this._eraseInBufferLine(j++, this._bufferService.buffer.x, this._bufferService.cols, this._bufferService.buffer.x === 0);
for (; j < this._bufferService.rows; j++) {
this._resetBufferLine(j);
}
this._dirtyRowService.markDirty(j);
break;
case 1:
j = this._bufferService.buffer.y;
this._dirtyRowService.markDirty(j);
// Deleted front part of line and everything before. This line will no longer be wrapped.
this._eraseInBufferLine(j, 0, this._bufferService.buffer.x + 1, true);
if (this._bufferService.buffer.x + 1 >= this._bufferService.cols) {
// Deleted entire previous line. This next line can no longer be wrapped.
this._bufferService.buffer.lines.get(j + 1).isWrapped = false;
}
while (j--) {
this._resetBufferLine(j);
}
this._dirtyRowService.markDirty(0);
break;
case 2:
j = this._bufferService.rows;
this._dirtyRowService.markDirty(j - 1);
while (j--) {
this._resetBufferLine(j);
}
this._dirtyRowService.markDirty(0);
break;
case 3:
// Clear scrollback (everything not in viewport)
const scrollBackSize = this._bufferService.buffer.lines.length - this._bufferService.rows;
if (scrollBackSize > 0) {
this._bufferService.buffer.lines.trimStart(scrollBackSize);
this._bufferService.buffer.ybase = Math.max(this._bufferService.buffer.ybase - scrollBackSize, 0);
this._bufferService.buffer.ydisp = Math.max(this._bufferService.buffer.ydisp - scrollBackSize, 0);
// Force a scroll event to refresh viewport
this._onScroll.fire(0);
}
break;
}
}
/**
* CSI Ps K Erase in Line (EL).
* Ps = 0 -> Erase to Right (default).
* Ps = 1 -> Erase to Left.
* Ps = 2 -> Erase All.
* CSI ? Ps K
* Erase in Line (DECSEL).
* Ps = 0 -> Selective Erase to Right (default).
* Ps = 1 -> Selective Erase to Left.
* Ps = 2 -> Selective Erase All.
*/
public eraseInLine(params: IParams): void {
this._restrictCursor();
switch (params.params[0]) {
case 0:
this._eraseInBufferLine(this._bufferService.buffer.y, this._bufferService.buffer.x, this._bufferService.cols);
break;
case 1:
this._eraseInBufferLine(this._bufferService.buffer.y, 0, this._bufferService.buffer.x + 1);
break;
case 2:
this._eraseInBufferLine(this._bufferService.buffer.y, 0, this._bufferService.cols);
break;
}
this._dirtyRowService.markDirty(this._bufferService.buffer.y);
}
/**
* CSI Ps L
* Insert Ps Line(s) (default = 1) (IL).
*/
public insertLines(params: IParams): void {
this._restrictCursor();
let param = params.params[0] || 1;
// make buffer local for faster access
const buffer = this._bufferService.buffer;
if (buffer.y > buffer.scrollBottom || buffer.y < buffer.scrollTop) {
return;
}
const row: number = buffer.y + buffer.ybase;
const scrollBottomRowsOffset = this._bufferService.rows - 1 - buffer.scrollBottom;
const scrollBottomAbsolute = this._bufferService.rows - 1 + buffer.ybase - scrollBottomRowsOffset + 1;
while (param--) {
// test: echo -e '\e[44m\e[1L\e[0m'
// blankLine(true) - xterm/linux behavior
buffer.lines.splice(scrollBottomAbsolute - 1, 1);
buffer.lines.splice(row, 0, buffer.getBlankLine(this._terminal.eraseAttrData()));
}
this._dirtyRowService.markRangeDirty(buffer.y, buffer.scrollBottom);
buffer.x = 0; // see https://vt100.net/docs/vt220-rm/chapter4.html - vt220 only?
}
/**
* CSI Ps M
* Delete Ps Line(s) (default = 1) (DL).
*/
public deleteLines(params: IParams): void {
this._restrictCursor();
let param = params.params[0] || 1;
// make buffer local for faster access
const buffer = this._bufferService.buffer;
if (buffer.y > buffer.scrollBottom || buffer.y < buffer.scrollTop) {
return;
}
const row: number = buffer.y + buffer.ybase;
let j: number;
j = this._bufferService.rows - 1 - buffer.scrollBottom;
j = this._bufferService.rows - 1 + buffer.ybase - j;
while (param--) {
// test: echo -e '\e[44m\e[1M\e[0m'