dte test coverage


Directory: ./
File: src/completion.c
Date: 2026-01-27 12:16:02
Coverage Exec Excl Total
Lines: 89.7% 464 2 519
Functions: 91.8% 45 0 49
Branches: 71.4% 217 0 304

Line Branch Exec Source
1 #include <fcntl.h>
2 #include <stdbool.h>
3 #include <stdlib.h>
4 #include <string.h>
5 #include <sys/stat.h>
6 #include <unistd.h>
7 #include "completion.h"
8 #include "bind.h"
9 #include "command/alias.h"
10 #include "command/args.h"
11 #include "command/parse.h"
12 #include "command/run.h"
13 #include "command/serialize.h"
14 #include "commands.h"
15 #include "compiler.h"
16 #include "config.h"
17 #include "editor.h"
18 #include "exec.h"
19 #include "filetype.h"
20 #include "mode.h"
21 #include "options.h"
22 #include "show.h"
23 #include "syntax/color.h"
24 #include "tag.h"
25 #include "terminal/cursor.h"
26 #include "terminal/key.h"
27 #include "terminal/style.h"
28 #include "util/arith.h"
29 #include "util/array.h"
30 #include "util/ascii.h"
31 #include "util/bit.h"
32 #include "util/bsearch.h"
33 #include "util/environ.h"
34 #include "util/intmap.h"
35 #include "util/log.h"
36 #include "util/numtostr.h"
37 #include "util/path.h"
38 #include "util/str-array.h"
39 #include "util/str-util.h"
40 #include "util/string-view.h"
41 #include "util/string.h"
42 #include "util/xdirent.h"
43 #include "util/xmalloc.h"
44 #include "util/xstring.h"
45 #include "vars.h"
46
47 typedef enum {
48 COLLECT_ALL, // (directories and files)
49 COLLECT_EXECUTABLES, // (directories and executable files)
50 COLLECT_DIRS_ONLY,
51 } FileCollectionType;
52
53 static bool is_executable(int dir_fd, const char *filename)
54 {
55 return faccessat(dir_fd, filename, X_OK, 0) == 0;
56 }
57
58 53 static bool is_ignored_dir_entry(StringView name)
59 {
60 53 return unlikely(name.length == 0)
61
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53 || strview_equal_cstring(name, ".")
62
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106 || strview_equal_cstring(name, "..");
63 }
64
65 10 static bool do_collect_files (
66 PointerArray *array,
67 const char *dirname,
68 StringView dirprefix,
69 StringView fileprefix,
70 FileCollectionType type
71 ) {
72 10 DIR *const dir = xopendir(dirname);
73
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10 if (!dir) {
74 return false;
75 }
76
77 10 const int dir_fd = dirfd(dir);
78
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10 if (unlikely(dir_fd < 0)) {
79 LOG_ERRNO("dirfd");
80 xclosedir(dir);
81 return false;
82 }
83
84
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10 if (type == COLLECT_EXECUTABLES && dirprefix.length == 0) {
85 1 dirprefix = strview("./");
86 }
87
88
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312 for (const struct dirent *de; (de = xreaddir(dir)); ) {
89 302 const char *name = de->d_name;
90 302 const StringView name_sv = strview(name);
91 302 bool has_prefix = strview_has_sv_prefix(name_sv, fileprefix);
92
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302 bool match = fileprefix.length ? has_prefix : name[0] != '.';
93
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302 if (!match || is_ignored_dir_entry(name_sv)) {
94 249 continue;
95 }
96
97 53 MaybeBool maybe_dir = is_dir_or_symlink_to_dir(de, dir_fd);
98 53 bool is_dir = (maybe_dir == MB_TRUE);
99
100
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53 if (!is_dir) {
101
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52 switch (type) {
102 case COLLECT_DIRS_ONLY:
103 continue;
104 case COLLECT_ALL:
105 break;
106 case COLLECT_EXECUTABLES:
107 if (!is_executable(dir_fd, name)) {
108 continue;
109 }
110 break;
111 default:
112 BUG("unhandled FileCollectionType value");
113 }
114 }
115
116 53 char *path = path_join_sv(dirprefix, name_sv, is_dir);
117 53 ptr_array_append(array, path);
118 }
119
120 10 xclosedir(dir);
121 10 return true;
122 }
123
124 10 static void collect_files(EditorState *e, CompletionState *cs, FileCollectionType type)
125 {
126 10 char *dir = path_dirname(cs->parsed);
127 10 StringView dirprefix;
128 10 StringView fileprefix;
129 10 char buf[8192];
130
131
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10 if (strview_has_prefix(cs->escaped, "~/")) {
132 2 const StringView home = e->home_dir;
133 2 StringView parsed = strview(cs->parsed);
134 2 BUG_ON(!strview_has_sv_prefix(parsed, home));
135 2 strview_remove_prefix(&parsed, home.length + STRLEN("/"));
136 2 bool sufficient_buf = parsed.length <= sizeof(buf) - sizeof("~/");
137 2 bool sane_home = strview_has_prefix(home, "/");
138
139
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2 if (unlikely(!sane_home || !sufficient_buf)) {
140 LOG_ERROR("%s", !sane_home ? "non-absolute $HOME" : "no buffer space");
141 free(dir);
142 return;
143 }
144
145 // Copy `cs->parsed` into `buf[]`, but with the $HOME/ prefix
146 // replaced with ~/
147 2 xmempcpy2(buf, STRN("~/"), parsed.data, parsed.length + 1);
148
149 2 dirprefix = path_slice_dirname(buf);
150 2 fileprefix = strview(buf + dirprefix.length + 1);
151 2 cs->tilde_expanded = true;
152 } else {
153 8 const char *base = path_basename(cs->parsed);
154 8 bool has_slash = (base != cs->parsed);
155
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8 dirprefix = strview(has_slash ? dir : "");
156 8 fileprefix = strview(base);
157 }
158
159 10 do_collect_files(&cs->completions, dir, dirprefix, fileprefix, type);
160 10 free(dir);
161
162
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10 if (cs->completions.count == 1) {
163 // Add space if completed string is not a directory
164 4 const char *s = cs->completions.ptrs[0];
165 4 size_t len = strlen(s);
166
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4 if (len > 0) {
167 4 cs->add_space_after_single_match = s[len - 1] != '/';
168 }
169 }
170 }
171
172 5 void collect_normal_aliases(EditorState *e, PointerArray *a, const char *prefix)
173 {
174 5 collect_hashmap_keys(&e->aliases, a, prefix);
175 5 }
176
177 5 static void collect_bound_keys(const IntMap *bindings, PointerArray *a, const char *prefix)
178 {
179 5 size_t prefix_len = strlen(prefix);
180 5 char keystr[KEYCODE_STR_BUFSIZE];
181
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328 for (IntMapIter it = intmap_iter(bindings); intmap_next(&it); ) {
182 318 size_t keylen = keycode_to_str(it.entry->key, keystr);
183
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318 if (str_has_strn_prefix(keystr, prefix, prefix_len)) {
184 141 ptr_array_append(a, xmemdup(keystr, keylen + 1));
185 }
186 }
187 5 }
188
189 1 void collect_bound_normal_keys(EditorState *e, PointerArray *a, const char *prefix)
190 {
191 1 collect_bound_keys(&e->normal_mode->key_bindings, a, prefix);
192 1 }
193
194 1 void collect_hl_styles(EditorState *e, PointerArray *a, const char *prefix)
195 {
196 1 const char *dot = strchr(prefix, '.');
197
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1 if (!dot || dot == prefix || (dot - prefix) > FILETYPE_NAME_MAX) {
198 // No dot found in prefix, or found at offset 0, or buffer too small;
199 // just collect matching highlight names added by the `hi` command
200 1 collect_builtin_styles(a, prefix);
201 1 collect_hashmap_keys(&e->styles.other, a, prefix);
202 2 return;
203 }
204
205 // Copy and null-terminate the filetype part of `prefix` (before the dot)
206 char filetype[FILETYPE_NAME_MAX + 1];
207 size_t ftlen = dot - prefix;
208 memcpy(filetype, prefix, ftlen);
209 filetype[ftlen] = '\0';
210
211 // Find or load the Syntax for `filetype`
212 const Syntax *syn = find_syntax(&e->syntaxes, filetype);
213 if (!syn) {
214 syn = load_syntax_by_filetype(e, filetype);
215 if (!syn) {
216 return;
217 }
218 }
219
220 // Collect all emit names from `syn` that start with the string after
221 // the dot
222 collect_syntax_emit_names(syn, a, dot + 1);
223 }
224
225 3 void collect_compilers(EditorState *e, PointerArray *a, const char *prefix)
226 {
227 3 collect_hashmap_keys(&e->compilers, a, prefix);
228 3 }
229
230 4 void collect_env (
231 char **env, // Pointer to environ(3), or any array with the same format
232 PointerArray *a,
233 StringView prefix, // Prefix to match against
234 const char *suffix // Suffix to append to collected strings
235 ) {
236
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4 if (strview_memchr(prefix, '=')) {
237 return;
238 }
239
240 4 size_t sfxlen = strlen(suffix) + 1;
241
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686 for (size_t i = 0; env[i]; i++) {
242 682 StringView var = strview(env[i]);
243
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682 if (var.length && strview_has_sv_prefix(var, prefix)) {
244 2 size_t pos = 0;
245 2 StringView name = get_delim(var.data, &pos, var.length, '=');
246
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2 if (likely(name.length)) {
247 2 ptr_array_append(a, xmemjoin(name.data, name.length, suffix, sfxlen));
248 }
249 }
250 }
251 }
252
253 2 static void complete_alias(EditorState *e, const CommandArgs *a)
254 {
255 2 CompletionState *cs = &e->cmdline.completion;
256
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2 if (a->nr_args == 0) {
257 1 collect_normal_aliases(e, &cs->completions, cs->parsed);
258
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1 } else if (a->nr_args == 1 && cs->parsed[0] == '\0') {
259 1 const char *cmd = find_alias(&e->aliases, a->args[0]);
260
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1 if (cmd) {
261 1 ptr_array_append(&cs->completions, xstrdup(cmd));
262 }
263 }
264 2 }
265
266 // Note: `-T` arguments are generated by collect_command_flag_args()
267 // and completed by collect_completions()
268 10 static void complete_bind(EditorState *e, const CommandArgs *a)
269 {
270 // Mask of flags that determine modes (excludes -q)
271 10 CommandFlagSet modemask = cmdargs_flagset_from_str("cnsT");
272
273
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10 if (u64_popcount(a->flag_set & modemask) > 1 || a->nr_flag_args > 1) {
274 // Don't complete bindings for multiple modes
275 return;
276 }
277
278 8 const ModeHandler *mode;
279
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8 if (cmdargs_has_flag(a, 'c')) {
280 1 mode = e->command_mode;
281
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7 } else if (cmdargs_has_flag(a, 's')) {
282 3 mode = e->search_mode;
283
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4 } else if (cmdargs_has_flag(a, 'T')) {
284 1 BUG_ON(a->nr_flag_args != 1);
285 1 BUG_ON(a->flags[0] != 'T');
286 1 mode = get_mode_handler(&e->modes, a->args[0]);
287
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1 if (!mode) {
288 return;
289 }
290 } else {
291 3 mode = e->normal_mode;
292 }
293
294 8 const IntMap *key_bindings = &mode->key_bindings;
295 8 CompletionState *cs = &e->cmdline.completion;
296
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8 if (a->nr_args == 0) {
297 4 collect_bound_keys(key_bindings, &cs->completions, cs->parsed);
298 4 return;
299 }
300
301
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4 if (a->nr_args != 1 || cs->parsed[0] != '\0') {
302 return;
303 }
304
305 4 KeyCode key = keycode_from_str(a->args[a->nr_flag_args]);
306
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4 if (key == KEY_NONE) {
307 return;
308 }
309
310 4 const CachedCommand *cmd = lookup_binding(key_bindings, key);
311
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4 if (!cmd) {
312 return;
313 }
314
315 4 ptr_array_append(&cs->completions, xstrdup(cmd->cmd_str));
316 }
317
318 static void complete_cd(EditorState *e, const CommandArgs* UNUSED_ARG(a))
319 {
320 CompletionState *cs = &e->cmdline.completion;
321 collect_files(e, cs, COLLECT_DIRS_ONLY);
322 if (str_has_prefix("-", cs->parsed) && xgetenv("OLDPWD")) {
323 ptr_array_append(&cs->completions, xstrdup("-"));
324 }
325 }
326
327 // Note: `[-ioe]` arguments are generated by collect_command_flag_args()
328 // and completed by collect_completions()
329 4 static void complete_exec(EditorState *e, const CommandArgs *a)
330 {
331 4 CompletionState *cs = &e->cmdline.completion;
332 4 size_t n = a->nr_args;
333 4 collect_files(e, cs, n == 0 ? COLLECT_EXECUTABLES : COLLECT_ALL);
334 4 }
335
336 1 static void complete_compile(EditorState *e, const CommandArgs *a)
337 {
338 1 CompletionState *cs = &e->cmdline.completion;
339 1 size_t n = a->nr_args;
340
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1 if (n == 0) {
341 1 collect_compilers(e, &cs->completions, cs->parsed);
342 } else {
343 collect_files(e, cs, n == 1 ? COLLECT_EXECUTABLES : COLLECT_ALL);
344 }
345 1 }
346
347 4 static void complete_cursor(EditorState *e, const CommandArgs *a)
348 {
349 4 CompletionState *cs = &e->cmdline.completion;
350 4 size_t n = a->nr_args;
351
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4 if (n == 0) {
352 1 collect_cursor_modes(&cs->completions, cs->parsed);
353
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3 } else if (n == 1) {
354 2 collect_cursor_types(&cs->completions, cs->parsed);
355
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1 } else if (n == 2) {
356 1 static const char example_colors[][8] = {"#22AABB"}; // For discoverability
357 1 collect_cursor_colors(&cs->completions, cs->parsed);
358 1 COLLECT_STRINGS(example_colors, &cs->completions, cs->parsed);
359 }
360 4 }
361
362 3 static void complete_def_mode(EditorState *e, const CommandArgs *a)
363 {
364
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3 if (a->nr_args == 0) {
365 return;
366 }
367
368 2 CompletionState *cs = &e->cmdline.completion;
369 2 PointerArray *completions = &cs->completions;
370 2 const char *prefix = cs->parsed;
371 2 size_t prefix_len = strlen(prefix);
372
373
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8 for (HashMapIter it = hashmap_iter(&e->modes); hashmap_next(&it); ) {
374 6 const char *name = it.entry->key;
375 6 const ModeHandler *mode = it.entry->value;
376
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6 if (!str_has_strn_prefix(name, prefix, prefix_len)) {
377 continue;
378 }
379
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6 if (mode->cmds != &normal_commands) {
380 // Exclude command/search mode
381 4 continue;
382 }
383
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2 if (string_array_contains_str(a->args + 1 + a->nr_flag_args, name)) {
384 // Exclude modes already specified in a previous argument
385 1 continue;
386 }
387 1 ptr_array_append(completions, xstrdup(name));
388 }
389 }
390
391 3 static void complete_errorfmt(EditorState *e, const CommandArgs *a)
392 {
393 3 CompletionState *cs = &e->cmdline.completion;
394
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3 if (a->nr_args == 0) {
395 1 collect_compilers(e, &cs->completions, cs->parsed);
396
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2 } else if (a->nr_args >= 2 && !cmdargs_has_flag(a, 'i')) {
397 2 collect_errorfmt_capture_names(&cs->completions, cs->parsed);
398 }
399 3 }
400
401 1 static void complete_ft(EditorState *e, const CommandArgs *a)
402 {
403 1 CompletionState *cs = &e->cmdline.completion;
404
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1 if (a->nr_args == 0) {
405 1 collect_ft(&e->filetypes, &cs->completions, cs->parsed);
406 }
407 1 }
408
409 2 static void complete_hi(EditorState *e, const CommandArgs *a)
410 {
411 2 CompletionState *cs = &e->cmdline.completion;
412
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2 if (a->nr_args == 0) {
413 1 collect_hl_styles(e, &cs->completions, cs->parsed);
414 } else {
415 // TODO: Take into account previous arguments and don't
416 // suggest repeat attributes or excess colors
417 1 collect_colors_and_attributes(&cs->completions, cs->parsed);
418 }
419 2 }
420
421 1 static void complete_include(EditorState *e, const CommandArgs *a)
422 {
423 1 CompletionState *cs = &e->cmdline.completion;
424
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1 if (a->nr_args == 0) {
425
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1 if (cmdargs_has_flag(a, 'b')) {
426 1 collect_builtin_includes(&cs->completions, cs->parsed);
427 } else {
428 collect_files(e, cs, COLLECT_ALL);
429 }
430 }
431 1 }
432
433 1 static void complete_macro(EditorState *e, const CommandArgs *a)
434 {
435 1 static const char verbs[][8] = {
436 "cancel",
437 "play",
438 "record",
439 "stop",
440 "toggle",
441 };
442
443
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1 if (a->nr_args != 0) {
444 return;
445 }
446
447 1 CompletionState *cs = &e->cmdline.completion;
448 1 COLLECT_STRINGS(verbs, &cs->completions, cs->parsed);
449 }
450
451 1 static void complete_mode(EditorState *e, const CommandArgs *a)
452 {
453
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1 if (a->nr_args != 0) {
454 return;
455 }
456
457 1 CompletionState *cs = &e->cmdline.completion;
458 1 collect_hashmap_keys(&e->modes, &cs->completions, cs->parsed);
459 }
460
461 1 static void complete_move_tab(EditorState *e, const CommandArgs *a)
462 {
463
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1 if (a->nr_args != 0) {
464 return;
465 }
466
467 1 static const char words[][8] = {"left", "right"};
468 1 CompletionState *cs = &e->cmdline.completion;
469 1 COLLECT_STRINGS(words, &cs->completions, cs->parsed);
470 }
471
472 4 static void complete_open(EditorState *e, const CommandArgs *a)
473 {
474
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4 if (!cmdargs_has_flag(a, 't')) {
475 4 collect_files(e, &e->cmdline.completion, COLLECT_ALL);
476 }
477 4 }
478
479 3 static void complete_option(EditorState *e, const CommandArgs *a)
480 {
481 3 CompletionState *cs = &e->cmdline.completion;
482
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3 if (a->nr_args == 0) {
483
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1 if (!cmdargs_has_flag(a, 'r')) {
484 1 collect_ft(&e->filetypes, &cs->completions, cs->parsed);
485 }
486
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2 } else if (a->nr_args & 1) {
487 1 collect_auto_options(&cs->completions, cs->parsed);
488 } else {
489 1 collect_option_values(e, &cs->completions, a->args[a->nr_args - 1], cs->parsed);
490 }
491 3 }
492
493 1 static void complete_save(EditorState *e, const CommandArgs* UNUSED_ARG(a))
494 {
495 1 collect_files(e, &e->cmdline.completion, COLLECT_ALL);
496 1 }
497
498 1 static void complete_quit(EditorState *e, const CommandArgs* UNUSED_ARG(a))
499 {
500 1 static const char exit_codes[][2] = {"0", "1"};
501 1 CompletionState *cs = &e->cmdline.completion;
502 1 COLLECT_STRINGS(exit_codes, &cs->completions, cs->parsed);
503 1 }
504
505 static void complete_redo(EditorState *e, const CommandArgs* UNUSED_ARG(a))
506 {
507 const Change *change = e->buffer->cur_change;
508 CompletionState *cs = &e->cmdline.completion;
509 for (unsigned long i = 1, n = change->nr_prev; i <= n; i++) {
510 ptr_array_append(&cs->completions, xstrdup(ulong_to_str(i)));
511 }
512 }
513
514 7 static void complete_set(EditorState *e, const CommandArgs *a)
515 {
516 7 CompletionState *cs = &e->cmdline.completion;
517
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7 if ((a->nr_args + 1) & 1) {
518 1 bool local = cmdargs_has_flag(a, 'l');
519 1 bool global = cmdargs_has_flag(a, 'g');
520 1 collect_options(&cs->completions, cs->parsed, local, global);
521 } else {
522 6 collect_option_values(e, &cs->completions, a->args[a->nr_args - 1], cs->parsed);
523 }
524 7 }
525
526 2 static void complete_setenv(EditorState *e, const CommandArgs *a)
527 {
528 2 CompletionState *cs = &e->cmdline.completion;
529
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2 if (a->nr_args == 0) {
530 1 collect_env(environ, &cs->completions, strview(cs->parsed), "");
531
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1 } else if (a->nr_args == 1 && cs->parsed[0] == '\0') {
532 1 BUG_ON(!a->args[0]);
533 1 const char *value = getenv(a->args[0]);
534
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1 if (value) {
535 1 ptr_array_append(&cs->completions, xstrdup(value));
536 }
537 }
538 2 }
539
540 6 static void complete_show(EditorState *e, const CommandArgs *a)
541 {
542 6 CompletionState *cs = &e->cmdline.completion;
543
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6 if (a->nr_args == 0) {
544 2 collect_show_subcommands(&cs->completions, cs->parsed);
545
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4 } else if (a->nr_args == 1) {
546 4 BUG_ON(!a->args[0]);
547 4 collect_show_subcommand_args(e, &cs->completions, a->args[0], cs->parsed);
548 }
549 6 }
550
551 static void complete_tag(EditorState *e, const CommandArgs *a)
552 {
553 CompletionState *cs = &e->cmdline.completion;
554 if (!cmdargs_has_flag(a, 'r')) {
555 BUG_ON(!cs->parsed);
556 StringView prefix = strview(cs->parsed);
557 collect_tags(&e->tagfile, &cs->completions, prefix);
558 }
559 }
560
561 1 static void complete_toggle(EditorState *e, const CommandArgs *a)
562 {
563 1 CompletionState *cs = &e->cmdline.completion;
564
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1 if (a->nr_args == 0) {
565 1 bool global = cmdargs_has_flag(a, 'g');
566 1 collect_toggleable_options(&cs->completions, cs->parsed, global);
567 }
568 1 }
569
570 1 static void complete_wsplit(EditorState *e, const CommandArgs *a)
571 {
572 1 CompletionState *cs = &e->cmdline.completion;
573
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1 if (!cmdargs_has_flag(a, 't') && !cmdargs_has_flag(a, 'n')) {
574 1 collect_files(e, cs, COLLECT_ALL);
575 }
576 1 }
577
578 typedef struct {
579 char cmd_name[12];
580 void (*complete)(EditorState *e, const CommandArgs *a);
581 } CompletionHandler;
582
583 static const CompletionHandler completion_handlers[] = {
584 {"alias", complete_alias},
585 {"bind", complete_bind},
586 {"cd", complete_cd},
587 {"compile", complete_compile},
588 {"cursor", complete_cursor},
589 {"def-mode", complete_def_mode},
590 {"errorfmt", complete_errorfmt},
591 {"exec", complete_exec},
592 {"ft", complete_ft},
593 {"hi", complete_hi},
594 {"include", complete_include},
595 {"macro", complete_macro},
596 {"mode", complete_mode},
597 {"move-tab", complete_move_tab},
598 {"open", complete_open},
599 {"option", complete_option},
600 {"quit", complete_quit},
601 {"redo", complete_redo},
602 {"save", complete_save},
603 {"set", complete_set},
604 {"setenv", complete_setenv},
605 {"show", complete_show},
606 {"tag", complete_tag},
607 {"toggle", complete_toggle},
608 {"wsplit", complete_wsplit},
609 };
610
611 24 UNITTEST {
612 24 CHECK_BSEARCH_ARRAY(completion_handlers, cmd_name);
613 // Ensure handlers are kept in sync with renamed/removed commands
614
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624 for (size_t i = 0; i < ARRAYLEN(completion_handlers); i++) {
615 600 const char *name = completion_handlers[i].cmd_name;
616
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600 if (!find_normal_command(name)) {
617 BUG("completion handler for non-existent command: \"%s\"", name);
618 }
619 }
620 24 }
621
622 20 static bool can_collect_flags (
623 char **args,
624 size_t argc,
625 size_t nr_flag_args,
626 bool allow_flags_after_nonflags
627 ) {
628
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20 if (allow_flags_after_nonflags) {
629
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16 for (size_t i = 0; i < argc; i++) {
630
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6 if (streq(args[i], "--")) {
631 return false;
632 }
633 }
634 return true;
635 }
636
637
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18 for (size_t i = 0, nonflag = 0; i < argc; i++) {
638
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14 if (args[i][0] != '-') {
639
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6 if (++nonflag > nr_flag_args) {
640 return false;
641 }
642 3 continue;
643 }
644
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8 if (streq(args[i], "--")) {
645 return false;
646 }
647 }
648
649 return true;
650 }
651
652 20 static bool collect_command_flags (
653 PointerArray *array,
654 char **args,
655 size_t argc,
656 const Command *cmd,
657 const CommandArgs *a,
658 const char *prefix
659 ) {
660 20 BUG_ON(prefix[0] != '-');
661 20 bool flags_after_nonflags = !(cmd->cmdopts & CMDOPT_NO_FLAGS_AFTER_ARGS);
662
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20 if (!can_collect_flags(args, argc, a->nr_flag_args, flags_after_nonflags)) {
663 return false;
664 }
665
666 14 const char *flags = cmd->flags;
667
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14 if (ascii_isalnum(prefix[1]) && prefix[2] == '\0') {
668
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2 if (strchr(flags, prefix[1])) {
669 2 ptr_array_append(array, xmemdup(prefix, 3));
670 }
671 2 return true;
672 }
673
674
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12 if (prefix[1] != '\0') {
675 return true;
676 }
677
678 11 char buf[3] = "-";
679
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64 for (size_t i = 0; flags[i]; i++) {
680
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53 if (!ascii_isalnum(flags[i]) || cmdargs_has_flag(a, flags[i])) {
681 19 continue;
682 }
683 34 buf[1] = flags[i];
684 34 ptr_array_append(array, xmemdup(buf, 3));
685 }
686
687 return true;
688 }
689
690 3 static void collect_command_flag_args (
691 EditorState *e,
692 PointerArray *array,
693 const char *prefix,
694 const char *cmd,
695 const CommandArgs *a
696 ) {
697 3 char flag = a->flags[0];
698
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3 if (streq(cmd, "bind")) {
699
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2 WARN_ON(flag != 'T');
700 2 collect_modes(&e->modes, array, prefix);
701
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1 } else if (streq(cmd, "exec")) {
702
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1 int fd = (flag == 'i') ? 0 : (flag == 'o' ? 1 : 2);
703
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1 WARN_ON(fd == 2 && flag != 'e');
704 1 collect_exec_actions(array, prefix, fd);
705 }
706 // TODO: Completions for `open -e` and `save -e`
707 3 }
708
709 // Only recurses for cmdname="repeat" and typically not more than once
710 // NOLINTNEXTLINE(misc-no-recursion)
711 87 static void collect_completions(EditorState *e, char **args, size_t argc)
712 {
713 87 CompletionState *cs = &e->cmdline.completion;
714 87 PointerArray *arr = &cs->completions;
715 87 const char *prefix = cs->parsed;
716
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87 if (!argc) {
717 4 collect_normal_commands(arr, prefix);
718 4 collect_normal_aliases(e, arr, prefix);
719 8 return;
720 }
721
722
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243 for (size_t i = 0; i < argc; i++) {
723
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160 if (!args[i]) {
724 // Embedded NULLs indicate there are multiple commands.
725 // Just return early here and avoid handling this case.
726 return;
727 }
728 }
729
730 83 const char *cmdname = args[0];
731 83 const Command *cmd = find_normal_command(cmdname);
732
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83 if (!cmd) {
733 return;
734 }
735
736 83 char **args_copy = copy_string_array(args + 1, argc - 1);
737 83 CommandArgs a = cmdargs_new(args_copy);
738 83 ArgParseError err = do_parse_args(cmd, &a);
739
740
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83 if (err == ARGERR_OPTION_ARGUMENT_MISSING) {
741 3 collect_command_flag_args(e, arr, prefix, cmdname, &a);
742 3 goto out;
743 }
744
745 80 bool dash = (prefix[0] == '-');
746 80 if (
747
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80 (err != ARGERR_NONE && err != ARGERR_TOO_FEW_ARGUMENTS)
748
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79 || (a.nr_args >= cmd->max_args && cmd->max_args != 0xFF && !dash)
749 ) {
750 2 goto out;
751 }
752
753
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78 if (dash && collect_command_flags(arr, args + 1, argc - 1, cmd, &a, prefix)) {
754 14 goto out;
755 }
756
757
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64 if (cmd->max_args == 0) {
758 1 goto out;
759 }
760
761 63 const CompletionHandler *h = BSEARCH(cmdname, completion_handlers, vstrcmp);
762
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63 if (h) {
763 60 h->complete(e, &a);
764
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3 } else if (streq(cmdname, "repeat")) {
765
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2 if (a.nr_args == 1) {
766 1 collect_normal_commands(arr, prefix);
767
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1 } else if (a.nr_args >= 2) {
768 1 collect_completions(e, args + 2, argc - 2);
769 }
770 }
771
772 1 out:
773 83 free_string_array(args_copy);
774 }
775
776 1 static bool is_valid_nonbracketed_var_name(StringView name)
777 {
778 1 AsciiCharType mask = ASCII_ALNUM | ASCII_UNDERSCORE;
779 1 size_t len = name.length;
780
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1 return len == 0 || (
781
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1 is_alpha_or_underscore(name.data[0])
782
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1 && ascii_type_prefix_length(name.data, len, mask) == len
783 );
784 }
785
786 2496 static int strptrcmp(const void *v1, const void *v2)
787 {
788 2496 const char *const *s1 = v1;
789 2496 const char *const *s2 = v2;
790 2496 return strcmp(*s1, *s2);
791 }
792
793 3 static size_t collect_vars(PointerArray *a, StringView name)
794 {
795 3 const char *suffix = "";
796 3 size_t pos = STRLEN("$");
797 3 strview_remove_prefix(&name, pos);
798
799
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3 if (strview_remove_matching_prefix(&name, "{")) {
800
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2 if (strview_memchr(name, '}')) {
801 return 0;
802 }
803 2 collect_builtin_config_variables(a, name);
804 2 pos += STRLEN("{");
805 2 suffix = "}";
806
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1 } else if (!is_valid_nonbracketed_var_name(name)) {
807 return 0;
808 }
809
810 3 collect_normal_vars(a, name, suffix);
811 3 collect_env(environ, a, name, suffix);
812 3 return pos;
813 }
814
815 89 static void init_completion(EditorState *e, const CommandLine *cmdline)
816 {
817 89 CompletionState *cs = &e->cmdline.completion;
818 89 const CommandRunner runner = normal_mode_cmdrunner(e);
819 89 BUG_ON(cs->orig);
820 89 BUG_ON(runner.e != e);
821 89 BUG_ON(!runner.lookup_alias);
822
823 89 const size_t cmdline_pos = cmdline->pos;
824 89 char *const cmd = string_clone_cstring(&cmdline->buf);
825 89 PointerArray array = PTR_ARRAY_INIT;
826 89 ssize_t semicolon = -1;
827 89 ssize_t completion_pos = -1;
828
829 89 for (size_t pos = 0; true; ) {
830
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424 while (ascii_isspace(cmd[pos])) {
831 166 pos++;
832 }
833
834
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258 if (pos >= cmdline_pos) {
835 32 completion_pos = cmdline_pos;
836 32 break;
837 }
838
839
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226 if (!cmd[pos]) {
840 break;
841 }
842
843
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226 if (cmd[pos] == ';') {
844 3 semicolon = array.count;
845 3 ptr_array_append(&array, NULL);
846 3 pos++;
847 3 continue;
848 }
849
850 223 CommandParseError err;
851 223 size_t end = find_end(cmd, pos, &err);
852
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223 if (err != CMDERR_NONE || end >= cmdline_pos) {
853 57 completion_pos = pos;
854 57 break;
855 }
856
857
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166 if (semicolon + 1 == array.count) {
858 88 char *name = xstrslice(cmd, pos, end);
859 88 const char *value = runner.lookup_alias(runner.e, name);
860
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88 if (value) {
861 size_t save = array.count;
862 if (parse_commands(&runner, &array, value) != CMDERR_NONE) {
863 for (size_t i = save, n = array.count; i < n; i++) {
864 free(array.ptrs[i]);
865 array.ptrs[i] = NULL;
866 }
867 array.count = save;
868 ptr_array_append(&array, parse_command_arg(&runner, name, end - pos));
869 } else {
870 // Remove NULL
871 array.count--;
872 }
873 } else {
874 88 ptr_array_append(&array, parse_command_arg(&runner, name, end - pos));
875 }
876 88 free(name);
877 } else {
878 78 ptr_array_append(&array, parse_command_arg(&runner, cmd + pos, end - pos));
879 }
880 166 pos = end;
881 }
882
883 89 StringView text = string_view(cmd, cmdline_pos); // Text to be completed
884 89 strview_remove_prefix(&text, completion_pos);
885
886
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89 if (strview_has_prefix(text, "$")) {
887 3 completion_pos += collect_vars(&cs->completions, text);
888 } else {
889 86 cs->escaped = text;
890 86 cs->parsed = parse_command_arg(&runner, text.data, text.length);
891 86 cs->add_space_after_single_match = true;
892 86 size_t count = array.count;
893
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86 char **args = count ? (char**)array.ptrs + 1 + semicolon : NULL;
894 83 size_t argc = count ? count - semicolon - 1 : 0;
895 86 collect_completions(e, args, argc);
896 }
897
898 89 ptr_array_free(&array);
899 89 ptr_array_sort(&cs->completions, strptrcmp);
900 89 cs->orig = cmd; // (takes ownership)
901 89 cs->tail = strview(cmd + cmdline_pos);
902 89 cs->head_len = completion_pos;
903 89 }
904
905 95 static void do_complete_command(CommandLine *cmdline)
906 {
907 95 const CompletionState *cs = &cmdline->completion;
908 95 const PointerArray *arr = &cs->completions;
909 95 const StringView middle = strview(arr->ptrs[cs->idx]);
910 95 const StringView tail = cs->tail;
911 95 const size_t head_length = cs->head_len;
912
913 95 String buf = string_new(head_length + tail.length + middle.length + 16);
914 95 string_append_buf(&buf, cs->orig, head_length);
915 95 string_append_escaped_arg_sv(&buf, middle, !cs->tilde_expanded);
916
917 95 bool single_completion = (arr->count == 1);
918
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95 if (single_completion && cs->add_space_after_single_match) {
919 41 string_append_byte(&buf, ' ');
920 }
921
922 95 size_t pos = buf.len;
923 95 string_append_strview(&buf, tail);
924 95 cmdline_set_text(cmdline, string_borrow_cstring(&buf));
925 95 cmdline->pos = pos;
926 95 string_free(&buf);
927
928
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95 if (single_completion) {
929 42 reset_completion(cmdline);
930 }
931 95 }
932
933 108 void complete_command_next(EditorState *e)
934 {
935 108 CompletionState *cs = &e->cmdline.completion;
936 108 const bool init = !cs->orig;
937
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108 if (init) {
938 88 init_completion(e, &e->cmdline);
939 }
940 108 size_t count = cs->completions.count;
941
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108 if (!count) {
942 return;
943 }
944
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90 if (!init) {
945 20 cs->idx = wrapping_increment(cs->idx, count);
946 }
947 90 do_complete_command(&e->cmdline);
948 }
949
950 5 void complete_command_prev(EditorState *e)
951 {
952 5 CompletionState *cs = &e->cmdline.completion;
953 5 const bool init = !cs->orig;
954
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5 if (init) {
955 1 init_completion(e, &e->cmdline);
956 }
957 5 size_t count = cs->completions.count;
958
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5 if (!count) {
959 return;
960 }
961
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5 if (!init) {
962 4 cs->idx = wrapping_decrement(cs->idx, count);
963 }
964 5 do_complete_command(&e->cmdline);
965 }
966
967 131 void reset_completion(CommandLine *cmdline)
968 {
969 131 CompletionState *cs = &cmdline->completion;
970 131 free(cs->parsed);
971 131 free(cs->orig);
972 131 ptr_array_free(&cs->completions);
973 131 *cs = (CompletionState){.orig = NULL};
974 131 }
975
976 12 void collect_hashmap_keys(const HashMap *map, PointerArray *a, const char *prefix)
977 {
978 12 size_t prefix_len = strlen(prefix);
979
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66 for (HashMapIter it = hashmap_iter(map); hashmap_next(&it); ) {
980 42 const char *name = it.entry->key;
981
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42 if (str_has_strn_prefix(name, prefix, prefix_len)) {
982 11 ptr_array_append(a, xstrdup(name));
983 }
984 }
985 12 }
986