summaryrefslogtreecommitdiff
path: root/config.c
blob: 267e2ccec43d50cddafb742c16dc05ab20cb75c8 (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
// Read a ted configuration file.
// Config files are formatted as several sections, each containing key = value pairs.
// e.g.:
// [section1]
// thing1 = 33
// thing2 = 454
// [section2]
// asdf = 123

#include "ted-internal.h"

/// Sections of `ted.cfg`
typedef enum {
	SECTION_NONE,
	SECTION_CORE,
	SECTION_KEYBOARD,
	SECTION_COLORS,
	SECTION_EXTENSIONS
} ConfigSection;

// all the "control" pointers here are relative to `settings_zero`.
typedef struct {
	const char *name;
	const bool *control;
	bool per_language; // allow per-language control
} SettingBool;
typedef struct {
	const char *name;
	const u8 *control;
	u8 min, max;
	bool per_language;
} SettingU8;
typedef struct {
	const char *name;
	const float *control;
	float min, max;
	bool per_language;
} SettingFloat;
typedef struct {
	const char *name;
	const u16 *control;
	u16 min, max;
	bool per_language;
} SettingU16;
typedef struct {
	const char *name;
	const u32 *control;
	u32 min, max;
	bool per_language;
} SettingU32;
typedef struct {
	const char *name;
	RcStr *const *control;
	bool per_language;
} SettingString;
typedef struct {
	const char *name;
	const KeyCombo *control;
	bool per_language;
} SettingKeyCombo;

typedef enum {
	SETTING_BOOL = 1,
	SETTING_U8,
	SETTING_U16,
	SETTING_U32,
	SETTING_FLOAT,
	SETTING_STRING,
	SETTING_KEY_COMBO
} SettingType;
typedef struct {
	SettingType type;
	const char *name;
	bool per_language;
	union {
		SettingU8 _u8;
		SettingBool _bool;
		SettingU16 _u16;
		SettingU32 _u32;
		SettingFloat _float;
		SettingString _string;
		SettingKeyCombo _key;
	} u;
} SettingAny;

// core settings
static const Settings settings_zero = {0};
static const SettingBool settings_bool[] = {
	{"auto-indent", &settings_zero.auto_indent, true},
	{"auto-add-newline", &settings_zero.auto_add_newline, true},
	{"remove-trailing-whitespace", &settings_zero.remove_trailing_whitespace, true},
	{"auto-reload", &settings_zero.auto_reload, true},
	{"auto-reload-config", &settings_zero.auto_reload_config, false},
	{"syntax-highlighting", &settings_zero.syntax_highlighting, true},
	{"line-numbers", &settings_zero.line_numbers, true},
	{"restore-session", &settings_zero.restore_session, false},
	{"regenerate-tags-if-not-found", &settings_zero.regenerate_tags_if_not_found, true},
	{"indent-with-spaces", &settings_zero.indent_with_spaces, true},
	{"trigger-characters", &settings_zero.trigger_characters, true},
	{"identifier-trigger-characters", &settings_zero.identifier_trigger_characters, true},
	{"phantom-completions", &settings_zero.phantom_completions, true},
	{"signature-help-enabled", &settings_zero.signature_help_enabled, true},
	{"document-links", &settings_zero.document_links, true},
	{"lsp-enabled", &settings_zero.lsp_enabled, true},
	{"lsp-log", &settings_zero.lsp_log, true},
	{"hover-enabled", &settings_zero.hover_enabled, true},
	{"vsync", &settings_zero.vsync, false},
	{"highlight-enabled", &settings_zero.highlight_enabled, true},
	{"highlight-auto", &settings_zero.highlight_auto, true},
	{"save-backup", &settings_zero.save_backup, true},
	{"crlf-windows", &settings_zero.crlf_windows, true},
	{"jump-to-build-error", &settings_zero.jump_to_build_error, true},
	{"force-monospace", &settings_zero.force_monospace, true},
	{"show-diagnostics", &settings_zero.show_diagnostics, true},
};
static const SettingU8 settings_u8[] = {
	{"tab-width", &settings_zero.tab_width, 1, 100, true},
	{"cursor-width", &settings_zero.cursor_width, 1, 100, true},
	{"undo-save-time", &settings_zero.undo_save_time, 1, 200, true},
	{"border-thickness", &settings_zero.border_thickness, 1, 30, false},
	{"padding", &settings_zero.padding, 0, 100, false},
	{"scrolloff", &settings_zero.scrolloff, 1, 100, true},
	{"tags-max-depth", &settings_zero.tags_max_depth, 1, 100, false},
};
static const SettingU16 settings_u16[] = {
	{"text-size", &settings_zero.text_size_no_dpi, TEXT_SIZE_MIN, TEXT_SIZE_MAX, false},
	{"max-menu-width", &settings_zero.max_menu_width, 10, U16_MAX, false},
	{"error-display-time", &settings_zero.error_display_time, 0, U16_MAX, false},
	{"framerate-cap", &settings_zero.framerate_cap, 3, 1000, false},
	{"lsp-port", &settings_zero.lsp_port, 0, 65535, true},
};
const SettingU16 setting_text_size_dpi_aware = {NULL, &settings_zero.text_size, 0, U16_MAX, false};
static const SettingU32 settings_u32[] = {
	{"max-file-size", &settings_zero.max_file_size, 100, 2000000000, false},
	{"max-file-size-view-only", &settings_zero.max_file_size_view_only, 100, 2000000000, false},
};
static const SettingFloat settings_float[] = {
	{"cursor-blink-time-on", &settings_zero.cursor_blink_time_on, 0, 1000, true},
	{"cursor-blink-time-off", &settings_zero.cursor_blink_time_off, 0, 1000, true},
	{"hover-time", &settings_zero.hover_time, 0, INFINITY, true},
	{"ctrl-scroll-adjust-text-size", &settings_zero.ctrl_scroll_adjust_text_size, -10, 10, true},
	{"lsp-delay", &settings_zero.lsp_delay, 0, 100, true},
};
static const SettingString settings_string[] = {
	{"build-default-command", &settings_zero.build_default_command, true},
	{"build-command", &settings_zero.build_command, true},
	{"root-identifiers", &settings_zero.root_identifiers, true},
	{"lsp", &settings_zero.lsp, true},
	{"lsp-configuration", &settings_zero.lsp_configuration, true},
	{"comment-start", &settings_zero.comment_start, true},
	{"comment-end", &settings_zero.comment_end, true},
	{"font", &settings_zero.font, false},
	{"font-bold", &settings_zero.font_bold, false},
};
static const SettingKeyCombo settings_key_combo[] = {
	{"hover-key", &settings_zero.hover_key, true},
	{"highlight-key", &settings_zero.highlight_key, true},
};


bool config_applies_to(Config *cfg, const char *path, Language language) {
	if (cfg->language && language != cfg->language)
		return false;
	if (cfg->path && !str_has_path_prefix(path, cfg->path))
		return false;
	return true;
}
static bool config_has_same_context(const Config *a, const Config *b) {
	if (a->language != b->language)
		return false;
	if (a->path && !b->path)
		return false;
	if (!a->path && b->path)
		return false;
	if (a->path && !streq(a->path, b->path))
		return false;
	return true;
}


static void config_set_setting(Config *cfg, ptrdiff_t offset, const void *value, size_t size) {
	memmove((char *)&cfg->settings + offset, value, size);
	memset(&cfg->settings_set[offset], 1, size);
}

static void config_set_bool(Config *cfg, const SettingBool *set, bool value) {
	config_set_setting(cfg, (char*)set->control - (char*)&settings_zero, &value, sizeof value);
}
static void config_set_u8(Config *cfg, const SettingU8 *set, u8 value) {
	if (value >= set->min && value <= set->max)
		config_set_setting(cfg, (char*)set->control - (char*)&settings_zero, &value, sizeof value);
}
static void config_set_u16(Config *cfg, const SettingU16 *set, u16 value) {
	if (value >= set->min && value <= set->max)
		config_set_setting(cfg, (char*)set->control - (char*)&settings_zero, &value, sizeof value);
}
static void config_set_u32(Config *cfg, const SettingU32 *set, u32 value) {
	if (value >= set->min && value <= set->max)
		config_set_setting(cfg, (char*)set->control - (char*)&settings_zero, &value, sizeof value);
}
static void config_set_float(Config *cfg, const SettingFloat *set, float value) {
	if (value >= set->min && value <= set->max)
		config_set_setting(cfg, (char*)set->control - (char*)&settings_zero, &value, sizeof value);
}
static void config_set_key_combo(Config *cfg, const SettingKeyCombo *set, KeyCombo value) {
	config_set_setting(cfg, (char *)set->control - (char *)&settings_zero, &value, sizeof value);
}
static void config_set_string(Config *cfg, const SettingString *set, const char *value) {
	assert(value);
	Settings *settings = &cfg->settings;
	const ptrdiff_t offset = ((char *)set->control - (char*)&settings_zero);
	RcStr **control = (RcStr **)((char *)settings + offset);
	if (*control) rc_str_decref(control);
	RcStr *rc = rc_str_new(value, -1);
	config_set_setting(cfg, offset, &rc, sizeof (RcStr *));
}
static void config_set_color(Config *cfg, ColorSetting setting, u32 color) {
	config_set_setting(cfg, (char *)&settings_zero.colors[setting] - (char *)&settings_zero, &color, sizeof color);
}



typedef struct {
	Ted *ted;
	const char *filename;
	ConfigSection section;
	u32 line_number; // currently processing this line number
	bool error;
} ConfigReader;

static void config_err(ConfigReader *cfg, PRINTF_FORMAT_STRING const char *fmt, ...) ATTRIBUTE_PRINTF(2, 3);
static void config_err(ConfigReader *cfg, const char *fmt, ...) {
	if (cfg->error) return;
	cfg->error = true;
	char error[1024] = {0};
	strbuf_printf(error, "%s:%u: ", cfg->filename, cfg->line_number);
	va_list args;
	va_start(args, fmt);
	vsnprintf(error + strlen(error), sizeof error - strlen(error) - 1, fmt, args);
	va_end(args);
	ted_error(cfg->ted, "%s", error);
}

static void settings_free_set(Settings *settings, const bool *set) {
	if (set[offsetof(Settings, language_extensions)])
		arr_free(settings->language_extensions);
	if (set[offsetof(Settings, key_actions)])
		arr_free(settings->key_actions);
	if (set[offsetof(Settings, bg_shader)])
		gl_rc_sab_decref(&settings->bg_shader);
	if (set[offsetof(Settings, bg_texture)])
		gl_rc_texture_decref(&settings->bg_texture);
	for (size_t i = 0; i < arr_count(settings_string); i++) {
		const SettingString *s = &settings_string[i];
		const ptrdiff_t offset = (char *)s->control - (char *)&settings_zero;
		if (set[offset]) {
			RcStr **rc = (RcStr **)((char *)settings + offset);
			rc_str_decref(rc);
		}
	}
}

void settings_free(Settings *settings) {
	static bool all_set[sizeof(Settings)];
	memset(all_set, 1, sizeof all_set);
	settings_free_set(settings, all_set);
}

static void config_free(Config *cfg) {
	settings_free(&cfg->settings);
	free(cfg->path);
	memset(cfg, 0, sizeof *cfg);
}


i32 config_priority(const Config *cfg) {
	size_t path_len = cfg->path ? strlen(cfg->path) : 0;
	return (i32)path_len * 2 + (cfg->language != 0);
}

void config_merge_into(Settings *dest, const Config *src_cfg) {
	const Settings *src = &src_cfg->settings;
	char *destc = (char *)dest;
	const char *srcc = (const char *)src;
	const bool *set = src_cfg->settings_set;
	settings_free_set(dest, set);
	for (size_t i = 0; i < sizeof(Settings); i++) {
		if (set[i])
			destc[i] = srcc[i];
	}
	// increment reference counts for things we've borrowed from src
	if (set[offsetof(Settings, bg_shader)])
		gl_rc_sab_incref(dest->bg_shader);
	if (set[offsetof(Settings, bg_texture)])
		gl_rc_texture_incref(dest->bg_texture);
	for (size_t i = 0; i < arr_count(settings_string); i++) {
		const SettingString *s = &settings_string[i];
		ptrdiff_t offset = (char *)s->control - (char *)&settings_zero;
		if (!set[offset]) continue;
		RcStr *rc = *(RcStr **)((char *)dest + offset);
		rc_str_incref(rc);
	}
	// we should never copy these from src
	assert(!set[offsetof(Settings, language_extensions)]);
	assert(!set[offsetof(Settings, key_actions)]);

	// merge language_extensions and key_actions
	arr_foreach_ptr(src->language_extensions, LanguageExtension, ext)
		arr_add(dest->language_extensions, *ext);
	arr_foreach_ptr(src->key_actions, KeyAction, act)
		arr_add(dest->key_actions, *act);
}

static SDL_Keycode config_parse_key(ConfigReader *cfg, const char *str) {
	SDL_Keycode keycode = SDL_GetKeyFromName(str);
	if (keycode != SDLK_UNKNOWN)
		return keycode;
	typedef struct {
		const char *keyname1;
		const char *keyname2; // alternate key name
		SDL_Keycode keycode;
	} KeyName;
	static KeyName const key_names[] = {
		{"X1", NULL, KEYCODE_X1},
		{"X2", NULL, KEYCODE_X2},
		{"Enter", NULL, SDLK_RETURN},
		{"Equals", "Equal", SDLK_EQUALS},
	};
	for (size_t i = 0; i < arr_count(key_names); ++i) {
		KeyName const *k = &key_names[i];
		if (streq_case_insensitive(str, k->keyname1) || (k->keyname2 && streq_case_insensitive(str, k->keyname2))) {
			keycode = k->keycode;
			break;
		}
	}
	if (keycode != SDLK_UNKNOWN)
		return keycode;
		
	if (isdigit(str[0])) { // direct keycode numbers, e.g. Ctrl+24 or Ctrl+08
		char *endp;
		long n = strtol(str, &endp, 10);
		if (*endp == '\0' && n > 0) {
			return (SDL_Keycode)n;
		} else {
			config_err(cfg, "Invalid keycode number: %s", str);
			return 0;
		}
	} else {
		config_err(cfg, "Unrecognized key name: %s.", str);
		return 0;
	}
}
// Returns the key combination described by str.
static KeyCombo config_parse_key_combo(ConfigReader *cfg, const char *str) {
	u32 modifier = 0;
	// read modifier
	while (true) {
		if (str_has_prefix(str, "Ctrl+")) {
			if (modifier & KEY_MODIFIER_CTRL) {
				config_err(cfg, "Ctrl+ written twice");
				return (KeyCombo){0};
			}
			modifier |= KEY_MODIFIER_CTRL;
			str += strlen("Ctrl+");
		} else if (str_has_prefix(str, "Shift+")) {
			if (modifier & KEY_MODIFIER_SHIFT) {
				config_err(cfg, "Shift+ written twice");
				return (KeyCombo){0};
			}
			modifier |= KEY_MODIFIER_SHIFT;
			str += strlen("Shift+");
		} else if (str_has_prefix(str, "Alt+")) {
			if (modifier & KEY_MODIFIER_ALT) {
				config_err(cfg, "Alt+ written twice");
				return (KeyCombo){0};
			}
			modifier |= KEY_MODIFIER_ALT;
			str += strlen("Alt+");
		} else break;
	}

	// read key
	SDL_Keycode keycode = config_parse_key(cfg, str);
	if (keycode == SDLK_UNKNOWN)
		return (KeyCombo){0};
	return KEY_COMBO(modifier, keycode);
}


static bool settings_initialized = false;
static SettingAny settings_all[1000] = {0};

static void config_init_settings(void) {
	if (settings_initialized) return;
	
	SettingAny *opt = settings_all;
	for (size_t i = 0; i < arr_count(settings_bool); ++i) {
		opt->type = SETTING_BOOL;
		opt->name = settings_bool[i].name;
		opt->per_language = settings_bool[i].per_language;
		opt->u._bool = settings_bool[i];
		++opt;
	}
	for (size_t i = 0; i < arr_count(settings_u8); ++i) {
		opt->type = SETTING_U8;
		opt->name = settings_u8[i].name;
		opt->per_language = settings_u8[i].per_language;
		opt->u._u8 = settings_u8[i];
		++opt;
	}
	for (size_t i = 0; i < arr_count(settings_u16); ++i) {
		opt->type = SETTING_U16;
		opt->name = settings_u16[i].name;
		opt->per_language = settings_u16[i].per_language;
		opt->u._u16 = settings_u16[i];
		++opt;
	}
	for (size_t i = 0; i < arr_count(settings_u32); ++i) {
		opt->type = SETTING_U32;
		opt->name = settings_u32[i].name;
		opt->per_language = settings_u32[i].per_language;
		opt->u._u32 = settings_u32[i];
		++opt;
	}
	for (size_t i = 0; i < arr_count(settings_float); ++i) {
		opt->type = SETTING_FLOAT;
		opt->name = settings_float[i].name;
		opt->per_language = settings_float[i].per_language;
		opt->u._float = settings_float[i];
		++opt;
	}
	for (size_t i = 0; i < arr_count(settings_string); ++i) {
		opt->type = SETTING_STRING;
		opt->name = settings_string[i].name;
		opt->per_language = settings_string[i].per_language;
		opt->u._string = settings_string[i];
		++opt;
	}
	for (size_t i = 0; i < arr_count(settings_key_combo); ++i) {
		opt->type = SETTING_KEY_COMBO;
		opt->name = settings_key_combo[i].name;
		opt->per_language = settings_key_combo[i].per_language;
		opt->u._key = settings_key_combo[i];
		++opt;
	}
	settings_initialized = true;
}


static void get_config_path(Ted *ted, char *expanded, size_t expanded_sz, const char *path) {
	assert(path != expanded);
	
	expanded[0] = '\0';
	if (path[0] == '~' && strchr(ALL_PATH_SEPARATORS, path[1])) {
		str_printf(expanded, expanded_sz, "%s%c%s", ted->home, PATH_SEPARATOR, path + 1);
	} else if (!path_is_absolute(path)) {
		if (!ted_get_file(ted, path, expanded, expanded_sz)) {
			str_cpy(expanded, expanded_sz, path);
		}
	} else {
		str_cpy(expanded, expanded_sz, path);
	}
	
}

// only reads fp for multi-line strings
static char *config_read_string(Ted *ted, ConfigReader *reader, const char *first_line, FILE *fp) {
	const char *p;
	char line_buf[1024];
	u32 start_line = reader->line_number;
	char delimiter = *first_line;
	char *str = NULL;
	bool increment_p = true;
	for (p = first_line + 1; *p != delimiter; p += increment_p) {
		increment_p = true;
		switch (*p) {
		case '\\':
			++p;
			switch (*p) {
			case '\\':
			case '"':
			case '`':
				break;
			case 'n':
				arr_add(str, '\n');
				continue;
			case 'r':
				arr_add(str, '\r');
				continue;
			case 't':
				arr_add(str, '\t');
				continue;
			case '[':
				arr_add(str, '[');
				continue;
			default:
				config_err(reader, "Unrecognized escape sequence: '\\%c'.", *p);
				arr_clear(str);
				return NULL;
			}
			break;
		case '\0':
			++reader->line_number;
			arr_add(str, '\n');
			if (!fgets(line_buf, sizeof line_buf, fp)) {
				reader->line_number = start_line;
				config_err(reader, "String doesn't end.");
				arr_clear(str);
				return NULL;
			}
			line_buf[strcspn(line_buf, "\r\n")] = 0;
			p = line_buf;
			increment_p = false;
			continue;
		case '\r':
		case '\n':
			assert(false);
			break;
		}
		arr_add(str, *p);
	}
	
	char *s = NULL;
	if (ted->nstrings < TED_MAX_STRINGS) {
		s = strn_dup(str, arr_len(str));
		ted->strings[ted->nstrings++] = s;
	}
	arr_clear(str);
	return s;
}

static void settings_load_bg_shader(Ted *ted, Config *cfg, const char *bg_shader_text) {
	char vshader[8192] ;
	strbuf_printf(vshader, "attribute vec2 v_pos;\n\
OUT vec2 t_pos;\n\
void main() { \n\
	gl_Position = vec4(v_pos * 2.0 - 1.0, 0.0, 1.0);\n\
	t_pos = v_pos;\n\
}");
	char fshader[8192];
	strbuf_printf(fshader, "IN vec2 t_pos;\n\
uniform float t_time;\n\
uniform float t_save_time;\n\
uniform vec2 t_aspect;\n\
uniform sampler2D t_texture;\n\
#line 1\n\
%s", bg_shader_text);
	
	
	char error[512] = {0};
	GLuint shader = gl_compile_and_link_shaders(error, vshader, fshader);
	if (*error)
		ted_error(ted, "%s", error);
	if (!shader) return;
	
	GLuint buffer = 0, array = 0;
	glGenBuffers(1, &buffer);
	if (gl_version_major >= 3) {
		glGenVertexArrays(1, &array);
		glBindVertexArray(array);
	}
	
	
	float buffer_data[][2] = {
		{0,0},
		{1,0},
		{1,1},
		{0,0},
		{1,1},
		{0,1}
	};

	GLuint v_pos = (GLuint)glGetAttribLocation(shader, "v_pos");
	glBindBuffer(GL_ARRAY_BUFFER, buffer);
	glBufferData(GL_ARRAY_BUFFER, sizeof buffer_data, buffer_data, GL_STATIC_DRAW);
	glVertexAttribPointer(v_pos, 2, GL_FLOAT, 0, 2 * sizeof(float), 0);
	glEnableVertexAttribArray(v_pos);

	cfg->settings.bg_shader = gl_rc_sab_new(shader, array, buffer);
}


static void settings_load_bg_texture(Ted *ted, Config *cfg, const char *path) {
	char expanded[TED_PATH_MAX];
	get_config_path(ted, expanded, sizeof expanded, path);
	
	GLuint texture = gl_load_texture_from_image(expanded);
	if (!texture) {
		ted_error(ted, "Couldn't load image %s", path);
		return;
	}

	cfg->settings.bg_texture = gl_rc_texture_new(texture);	
}

// NOTE: for multi-line strings, this will read from fp (otherwise it won't)
static void config_parse_line(ConfigReader *reader, Config *cfg, char *line, FILE *fp) {
	Ted *ted = reader->ted;
	if (reader->section == 0) {
		// there was an error reading this section. don't bother with anything else.
		return;
	}
	
	switch (line[0]) {
	case '#': // comment
	case '\0': // blank line
		return;
	}
	
	char *equals = strchr(line, '=');
	if (!equals) {
		config_err(reader, "Invalid line syntax. "
			"Lines should either look like [section-name] or key = value");
		return;
	}

	char *key = line;
	*equals = '\0';
	char *value = equals + 1;
	while (isspace(*key)) ++key;
	while (isspace(*value)) ++value;
	if (equals != line) {
		for (char *p = equals - 1; p > line; --p) {
			// remove trailing spaces after key
			if (isspace(*p)) *p = '\0';
			else break;
		}
	}
	if (key[0] == '\0') {
		config_err(reader, "Empty property name. This line should look like: key = value");
		return;
	}
	
	switch (reader->section) {
	case SECTION_NONE:
		config_err(reader, "Line outside of any section."
			"Try putting a section header, e.g. [keyboard] before this line?");
		break;
	case SECTION_COLORS: {
		ColorSetting setting = color_setting_from_str(key);
		if (setting != COLOR_UNKNOWN) {
			u32 color = 0;
			if (color_from_str(value, &color)) {
				config_set_color(cfg, setting, color);
			} else {
				config_err(reader, "'%s' is not a valid color. Colors should look like #rgb, #rgba, #rrggbb, or #rrggbbaa.", value);
			}
		} else {
			// don't actually produce this error.
			// we have removed colors in the past and might again in the future.
		#if 0
			config_err(cfg, "No such color setting: %s", key);
		#endif
		}
	} break;
	case SECTION_KEYBOARD: {
		// lines like Ctrl+Down = 10 :down
		KeyCombo key_combo = config_parse_key_combo(reader, key);
		KeyAction action = {0};
		action.key_combo = key_combo;
		CommandArgument argument = {
			.number = 1, // default argument = 1
			.string = NULL
		};
		if (isdigit(*value)) {
			// read the argument
			char *endp;
			argument.number = strtoll(value, &endp, 10);
			value = endp;
		} else if (*value == '"' || *value == '`') {
			// string argument
			argument.string = config_read_string(ted, reader, value, fp);
		}
		while (isspace(*value)) ++value; // skip past space following argument
		if (*value == ':') {
			// read the command
			Command command = command_from_str(value + 1);
			if (command != CMD_UNKNOWN) {
				action.command = command;
				action.argument = argument;
			} else {
				config_err(reader, "Unrecognized command %s", value);
			}
		} else {
			config_err(reader, "Expected ':' for key action. This line should look something like: %s = :command.", key);
		}
		
		Settings *settings = &cfg->settings;
		bool have = false;
		// check if we already have an action for this key combo
		arr_foreach_ptr(settings->key_actions, KeyAction, act) {
			if (act->key_combo.value == key_combo.value) {
				*act = action;
				have = true;
				break;
			}
		}
		// if this is a new key combo, add an element to the key_actions array
		if (!have)
			arr_add(settings->key_actions, action);
	} break;
	case SECTION_EXTENSIONS: {
		Language lang = language_from_str(key);
		if (lang == LANG_NONE) {
			config_err(reader, "Invalid programming language: %s.", key);
		} else {
			char *exts = calloc(1, strlen(value) + 1);
			char *dst = exts;
			// get rid of whitespace in extension list
			for (const char *src = value; *src; ++src)
				if (!isspace(*src))
					*dst++ = *src;
			*dst = 0;
			Settings *settings = &cfg->settings;
			// remove old extensions
			u32 *indices = NULL;
			arr_foreach_ptr(settings->language_extensions, LanguageExtension, ext) {
				if (ext->language == lang) {
					arr_add(indices, (u32)(ext - settings->language_extensions));
				}
			}
			for (u32 i = 0; i < arr_len(indices); ++i)
				arr_remove(settings->language_extensions, indices[i] - i);
			arr_free(indices);
			
			char *p = exts;
			while (*p) {
				while (*p == ',')
					++p;
				if (*p == '\0')
					break;
				size_t len = strcspn(p, ",");
				LanguageExtension *ext = arr_addp(settings->language_extensions);
				ext->language = lang;
				memcpy(ext->extension, p, len);
				p += len;
			}
			free(exts);
		}
	} break;
	case SECTION_CORE: {
		const char *endptr;
		long long const integer = strtoll(value, (char **)&endptr, 10);
		bool const is_integer = *endptr == '\0';
		double const floating = strtod(value, (char **)&endptr);
		bool const is_floating = *endptr == '\0';
		bool is_bool = false;
		bool boolean = false;
	#define BOOL_HELP "(should be yes/no/on/off/true/false)"
		if (streq(value, "yes") || streq(value, "on") || streq(value, "true")) {
			is_bool = true;
			boolean = true;
		} else if (streq(value, "no") || streq(value, "off") || streq(value, "false")) {
			is_bool = true;
			boolean = false;
		}
		
		if (value[0] == '"' || value[0] == '`') {
			char *string = config_read_string(ted, reader, value, fp);
			if (string)
				value = string;
		}

		
		SettingAny const *setting_any = NULL;
		for (u32 i = 0; i < arr_count(settings_all); ++i) {
			SettingAny const *s = &settings_all[i];
			if (s->type == 0) break;
			if (streq(key, s->name)) {
				setting_any = s;
				break;
			}
		}
		
		if (!setting_any) {
			if (streq(key, "bg-shader"))
				settings_load_bg_shader(ted, cfg, value);
			else if (streq(key, "bg-texture"))
				settings_load_bg_texture(ted, cfg, value);
			// it's probably a bad idea to error on unrecognized settings
			// because if we ever remove a setting in the future
			// everyone will get errors
			break;
		}
		
		if (cfg->language != 0 && !setting_any->per_language) {
			config_err(reader, "Setting %s cannot be controlled for individual languages.", key);
			break;
		}
		
		switch (setting_any->type) {
		case SETTING_BOOL: {
			const SettingBool *setting = &setting_any->u._bool;
			if (is_bool)
				config_set_bool(cfg, setting, boolean);
			else
				config_err(reader, "Invalid %s: %s. This should be yes, no, on, or off.", setting->name, value);
		} break;
		case SETTING_U8: {
			const SettingU8 *setting = &setting_any->u._u8;
			if (is_integer && integer >= setting->min && integer <= setting->max)
				config_set_u8(cfg, setting, (u8)integer);
			else
				config_err(reader, "Invalid %s: %s. This should be an integer from %u to %u.", setting->name, value, setting->min, setting->max);
		} break;
		case SETTING_U16: {
			const SettingU16 *setting = &setting_any->u._u16;
			if (is_integer && integer >= setting->min && integer <= setting->max)
				config_set_u16(cfg, setting, (u16)integer);
			else
				config_err(reader, "Invalid %s: %s. This should be an integer from %u to %u.", setting->name, value, setting->min, setting->max);
		} break;
		case SETTING_U32: {
			const SettingU32 *setting = &setting_any->u._u32;
			if (is_integer && integer >= setting->min && integer <= setting->max)
				config_set_u32(cfg, setting, (u32)integer);
			else
				config_err(reader, "Invalid %s: %s. This should be an integer from %" PRIu32 " to %" PRIu32 ".",
					setting->name, value, setting->min, setting->max);
		} break;
		case SETTING_FLOAT: {
			const SettingFloat *setting = &setting_any->u._float;
			if (is_floating && floating >= setting->min && floating <= setting->max)
				config_set_float(cfg, setting, (float)floating);
			else
				config_err(reader, "Invalid %s: %s. This should be a number from %g to %g.", setting->name, value, setting->min, setting->max);
		} break;
		case SETTING_STRING: {
			const SettingString *setting = &setting_any->u._string;
			config_set_string(cfg, setting, value);
		} break;
		case SETTING_KEY_COMBO: {
			const SettingKeyCombo *setting = &setting_any->u._key;
			KeyCombo combo = config_parse_key_combo(reader, value);
			if (combo.value) {
				config_set_key_combo(cfg, setting, combo);
			}
		} break;
		}
		if (streq(setting_any->name, "text-size")) {
			config_set_u16(cfg, &setting_text_size_dpi_aware, (u16)roundf((float)integer * ted_get_ui_scaling(ted)));
		}
		
	} break;
	}
}

static int key_action_qsort_cmp_combo(const void *av, const void *bv) {
	const KeyAction *a = av, *b = bv;
	if (a->key_combo.value < b->key_combo.value)
		return -1;
	if (a->key_combo.value > b->key_combo.value)
		return 1;
	return 0;
}

static void config_read_file(Ted *ted, const char *cfg_path, const char ***include_stack) {
	// check for, e.g. %include ted.cfg inside ted.cfg
	arr_foreach_ptr(*include_stack, const char *, p_include) {
		if (streq(cfg_path, *p_include)) {
			char text[1024];
			strbuf_cpy(text, "%include loop in config files: ");
			strbuf_cat(text, (*include_stack)[0]);
			for (u32 i = 1; i < arr_len(*include_stack); ++i) {
				if (i > 1)
					strbuf_cat(text, ", which");
				strbuf_catf(text, " includes %s", (*include_stack)[i]);
			}
			if (arr_len(*include_stack) > 1)
				strbuf_cat(text, ", which");
			strbuf_catf(text, " includes %s", cfg_path);
			ted_error(ted, "%s", text);
			return;
		}
	}
	arr_add(*include_stack, cfg_path);
	
	FILE *fp = fopen(cfg_path, "rb");
	if (!fp) {
		ted_error(ted, "Couldn't open config file %s: %s.", cfg_path, strerror(errno));
		return;
	}
	
	
	ConfigReader reader_data = {
		.ted = ted,
		.filename = cfg_path,
		.line_number = 1,
		.error = false
	};
	ConfigReader *reader = &reader_data;
	
	Config *cfg = NULL;
	
	char line[4096] = {0};
	while (fgets(line, sizeof line, fp)) {
		char *newline = strchr(line, '\n');
		if (!newline && !feof(fp)) {
			config_err(reader, "Line is too long.");
			break;
		}
		
		if (newline) *newline = '\0';
		char *carriage_return = strchr(line, '\r');
		if (carriage_return) *carriage_return = '\0';
		
		if (line[0] == '[') {
			// a new section!
			#define SECTION_HEADER_HELP "Section headers should look like this: [(path//)(language.)section-name]"
			char path[TED_PATH_MAX]; path[0] = '\0';
			char *closing = strchr(line, ']');
			Language language = 0;
			if (!closing) {
				config_err(reader, "Unmatched [. " SECTION_HEADER_HELP);
				break;
			} else if (closing[1] != '\0') {
				config_err(reader, "Text after section. " SECTION_HEADER_HELP);
				break;
			} else {
				*closing = '\0';
				char *section = line + 1;
				char *path_end = strstr(section, "//");
				if (path_end) {
					size_t path_len = (size_t)(path_end - section);
					path[0] = '\0';
					// expand ~
					if (section[0] == '~') {
						str_cpy(path, sizeof path, ted->home);
						++section;
						--path_len;
					}
					strn_cat(path, sizeof path, section, path_len);
					#if _WIN32
					// replace forward slashes with backslashes
					for (char *p = path; *p; ++p)
						if (*p == '/')
							*p = '\\';
					#endif
					section = path_end + 2;
				}
				
				char *dot = strchr(section, '.');
				
				if (dot) {
					*dot = '\0';
					language = language_from_str(section);
					if (!language) {
						config_err(reader, "Unrecognized language: %s.", section);
					}
					section = dot + 1;
				}
				
				if (streq(section, "keyboard")) {
					reader->section = SECTION_KEYBOARD;
				} else if (streq(section, "colors")) {
					reader->section = SECTION_COLORS;
				} else if (streq(section, "core")) {
					reader->section = SECTION_CORE;
				} else if (streq(section, "extensions")) {
					if (language != 0 || *path) {
						config_err(reader, "Extensions section cannot be language- or path-specific.");
						break;
					}
					reader->section = SECTION_EXTENSIONS;
				} else {
					config_err(reader, "Unrecognized section: [%s].", section);
				}
			}
			Config new_cfg = {
				.language = language,
				.path = *path ? path : NULL,
			};
			cfg = NULL;
			// search for config with same context to update
			arr_foreach_ptr(ted->all_configs, Config, c) {
				if (config_has_same_context(c, &new_cfg)) {
					cfg = c;
				}
			}
			if (!cfg) {
				// create new config
				cfg = arr_addp(ted->all_configs);
				cfg->path = *path ? str_dup(path) : NULL;
				cfg->language = language;
				printf("new config:%s(%u)\n",cfg->path,cfg->language);
			}
		} else if (line[0] == '%') {
			if (str_has_prefix(line, "%include ")) {
				char included[TED_PATH_MAX];
				char expanded[TED_PATH_MAX];
				strbuf_cpy(included, line + strlen("%include "));
				while (*included && isspace(included[strlen(included) - 1]))
					included[strlen(included) - 1] = '\0';
				get_config_path(ted, expanded, sizeof expanded, included);
				config_read_file(ted, expanded, include_stack);
			}
		} else if (cfg) {
			config_parse_line(reader, cfg, line, fp);
		} else {
			const char *p = line;
			while (isspace(*p)) ++p;
			if (*p == '\0' || *p == '#') {
				// blank line
			} else {
				config_err(reader, "Config has text before first section header.");
			}
		}
		++reader->line_number;
	}
	
	if (ferror(fp))
		ted_error(ted, "Error reading %s.", cfg_path);
	fclose(fp);
	arr_remove_last(*include_stack);
}

void config_free_all(Ted *ted) {
	arr_foreach_ptr(ted->all_configs, Config, cfg) {
		config_free(cfg);
	}
	arr_clear(ted->all_configs);
	for (u32 i = 0; i < ted->nstrings; ++i) {
		free(ted->strings[i]);
		ted->strings[i] = NULL;
	}
	ted->nstrings = 0;
	settings_free(&ted->default_settings);
}


static char *last_separator(char *path) {
	for (int i = (int)strlen(path) - 1; i >= 0; --i)
		if (strchr(ALL_PATH_SEPARATORS, path[i]))
			return &path[i];
	return NULL;
}

char *settings_get_root_dir(const Settings *settings, const char *path) {
	char best_path[TED_PATH_MAX];
	*best_path = '\0';
	u32 best_path_score = 0;
	char pathbuf[TED_PATH_MAX];
	strbuf_cpy(pathbuf, path);
	
	while (1) {
		FsDirectoryEntry **entries = fs_list_directory(pathbuf);
		if (entries) { // note: this may actually be NULL on the first iteration if `path` is a file
			for (int e = 0; entries[e]; ++e) {
				const char *entry_name = entries[e]->name;
				const char *root_identifiers = rc_str(settings->root_identifiers, "");
				const char *ident_name = root_identifiers;
				while (*ident_name) {
					const char *separators = ", \t\n\r\v";
					size_t ident_len = strcspn(ident_name, separators);
					if (strlen(entry_name) == ident_len && strncmp(entry_name, ident_name, ident_len) == 0) {
						// we found an identifier!
						u32 score = U32_MAX - (u32)(ident_name - root_identifiers);
						if (score > best_path_score) {
							best_path_score = score;
							strbuf_cpy(best_path, pathbuf);
						}
					}
					ident_name += ident_len;
					ident_name += strspn(ident_name, separators);
				}
			}
			fs_dir_entries_free(entries);
		}
		
		char *p = last_separator(pathbuf);
		if (!p)
			break;
		*p = '\0';
		if (!last_separator(pathbuf))
			break; // we made it all the way to / (or c:\ or whatever)
	}
	
	if (*best_path) {
		return str_dup(best_path);
	} else {
		// didn't find any identifiers.
		// just return
		//  - `path` if it's a directory
		//  - the directory containing path if it's a file
		if (fs_path_type(path) == FS_DIRECTORY) {
			return str_dup(path);
		}
		strbuf_cpy(pathbuf, path);
		char *sep = last_separator(pathbuf);
		*sep = '\0';
		return str_dup(pathbuf);
	}
}

void config_read(Ted *ted, const char *filename) {
	const char **include_stack = NULL;
	config_init_settings();
	config_read_file(ted, filename, &include_stack);
	ted_compute_settings(ted, "", LANG_NONE, &ted->default_settings);
}

u32 settings_color(const Settings *settings, ColorSetting color) {
	if (color >= COLOR_COUNT) {
		assert(0);
		return 0xff00ffff;
	}
	return settings->colors[color];
}

void settings_color_floats(const Settings *settings, ColorSetting color, float f[4]) {
	color_u32_to_floats(settings_color(settings, color), f);
	
}

u16 settings_tab_width(const Settings *settings) {
	return settings->tab_width;
}

bool settings_indent_with_spaces(const Settings *settings) {
	return settings->indent_with_spaces;
}

bool settings_auto_indent(const Settings *settings) {
	return settings->auto_indent;
}

float settings_border_thickness(const Settings *settings) {
	return settings->border_thickness;
}

float settings_padding(const Settings *settings) {
	return settings->padding;
}