src/prompt.c

   1 /* Copyright (c) 2006-2014 Jonas Fonseca <jonas.fonseca@gmail.com>
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License as
   5  * published by the Free Software Foundation; either version 2 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #include "tig/tig.h"
  15 #include "tig/view.h"
  16 #include "tig/draw.h"
  17 #include "tig/display.h"
  18 #include "tig/options.h"
  19 #include "tig/prompt.h"
  20 #include "tig/pager.h"
  21 #include "tig/types.h"
  22
  23 #ifdef HAVE_READLINE
  24 #include <readline/readline.h>
  25 #include <readline/history.h>
  26 #endif /* HAVE_READLINE */
  27
  28 static char *
  29 prompt_input(const char *prompt, struct input *input)
  30 {
  31         enum input_status status = INPUT_OK;
  32         unsigned char chars_length[SIZEOF_STR];
  33         struct key key;
  34         size_t promptlen = strlen(prompt);
  35         int pos = 0, chars = 0;
  36
  37         input->buf[pos] = 0;
  38
  39         while (status == INPUT_OK || status == INPUT_SKIP) {
  40
  41                 update_status("%s%.*s", prompt, pos, input->buf);
  42
  43                 if (get_input(pos + promptlen, &key, FALSE) == OK) {
  44                         int len = strlen(key.data.bytes);
  45
  46                         if (pos + len >= sizeof(input->buf)) {
  47                                 report("Input string too long");
  48                                 return NULL;
  49                         }
  50
  51                         string_ncopy_do(input->buf + pos, sizeof(input->buf) - pos, key.data.bytes, len);
  52                         pos += len;
  53                         chars_length[chars++] = len;
  54                         status = input->handler(input, &key);
  55                         if (status != INPUT_OK) {
  56                                 pos -= len;
  57                                 chars--;
  58                         } else {
  59                                 int changed_pos = strlen(input->buf);
  60
  61                                 if (changed_pos != pos) {
  62                                         pos = changed_pos;
  63                                         chars_length[chars - 1] = changed_pos - (pos - len);
  64                                 }
  65                         }
  66                 } else {
  67                         status = input->handler(input, &key);
  68                         if (status == INPUT_DELETE) {
  69                                 int len = chars_length[--chars];
  70
  71                                 pos -= len;
  72                                 status = INPUT_OK;
  73                         } else {
  74                                 int changed_pos = strlen(input->buf);
  75
  76                                 if (changed_pos != pos) {
  77                                         pos = changed_pos;
  78                                         chars_length[chars++] = changed_pos - pos;
  79                                 }
  80                         }
  81                 }
  82                 input->buf[pos] = 0;
  83         }
  84
  85         report_clear();
  86
  87         if (status == INPUT_CANCEL)
  88                 return NULL;
  89
  90         input->buf[pos++] = 0;
  91
  92         return input->buf;
  93 }
  94
  95 static enum input_status
  96 prompt_default_handler(struct input *input, struct key *key)
  97 {
  98         if (key->modifiers.multibytes)
  99                 return INPUT_SKIP;
 100
 101         switch (key->data.value) {
 102         case KEY_RETURN:
 103         case KEY_ENTER:
 104         case '\n':
 105                 return *input->buf ? INPUT_STOP : INPUT_CANCEL;
 106
 107         case KEY_BACKSPACE:
 108                 return *input->buf ? INPUT_DELETE : INPUT_CANCEL;
 109
 110         case KEY_ESC:
 111                 return INPUT_CANCEL;
 112
 113         default:
 114                 return INPUT_SKIP;
 115         }
 116 }
 117
 118 static enum input_status
 119 prompt_yesno_handler(struct input *input, struct key *key)
 120 {
 121         unsigned long c = key_to_unicode(key);
 122
 123         if (c == 'y' || c == 'Y')
 124                 return INPUT_STOP;
 125         if (c == 'n' || c == 'N')
 126                 return INPUT_CANCEL;
 127         return prompt_default_handler(input, key);
 128 }
 129
 130 bool
 131 prompt_yesno(const char *prompt)
 132 {
 133         char prompt2[SIZEOF_STR];
 134         struct input input = { prompt_yesno_handler, NULL };
 135
 136         if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
 137                 return FALSE;
 138
 139         return !!prompt_input(prompt2, &input);
 140 }
 141
 142 struct incremental_input {
 143         struct input input;
 144         input_handler handler;
 145         bool edit_mode;
 146 };
 147
 148 static enum input_status
 149 read_prompt_handler(struct input *input, struct key *key)
 150 {
 151         struct incremental_input *incremental = (struct incremental_input *) input;
 152
 153         if (incremental->edit_mode && !key->modifiers.multibytes)
 154                 return prompt_default_handler(input, key);
 155
 156         if (!unicode_width(key_to_unicode(key), 8))
 157                 return INPUT_SKIP;
 158
 159         if (!incremental->handler)
 160                 return INPUT_OK;
 161
 162         return incremental->handler(input, key);
 163 }
 164
 165 char *
 166 read_prompt_incremental(const char *prompt, bool edit_mode, input_handler handler, void *data)
 167 {
 168         static struct incremental_input incremental = { { read_prompt_handler } };
 169
 170         incremental.input.data = data;
 171         incremental.handler = handler;
 172         incremental.edit_mode = edit_mode;
 173
 174         return prompt_input(prompt, (struct input *) &incremental);
 175 }
 176
 177 #ifdef HAVE_READLINE
 178 static void
 179 readline_display(void)
 180 {
 181         wmove(status_win, 0, 0);
 182         waddstr(status_win, rl_display_prompt);
 183         waddstr(status_win, rl_line_buffer);
 184         wclrtoeol(status_win);
 185         wmove(status_win, 0, strlen(rl_display_prompt) + rl_point);
 186         wrefresh(status_win);
 187 }
 188
 189 static char *
 190 readline_variable_generator(const char *text, int state)
 191 {
 192         static const char *vars[] = {
 193 #define FORMAT_VAR(name, ifempty, initval) "%(" #name ")"
 194                 ARGV_ENV_INFO(FORMAT_VAR),
 195 #undef FORMAT_VAR
 196                 NULL
 197         };
 198
 199         static int index, len;
 200         const char *name;
 201         char *variable = NULL; /* No match */
 202
 203         /* If it is a new word to complete, initialize */
 204         if (!state) {
 205                 index = 0;
 206                 len = strlen(text);
 207         }
 208
 209         /* Return the next name which partially matches */
 210         while ((name = vars[index])) {
 211                 index++;
 212
 213                 /* Complete or format a variable */
 214                 if (strncmp(name, text, len) == 0) {
 215                         if (strlen(name) > len)
 216                                 variable = strdup(name);
 217                         else
 218                                 variable = argv_format_arg(&argv_env, text);
 219                         break;
 220                 }
 221         }
 222
 223         return variable;
 224 }
 225
 226 static char *
 227 readline_action_generator(const char *text, int state)
 228 {
 229         static const char *actions[] = {
 230                 "!",
 231                 "source",
 232                 "color",
 233                 "bind",
 234                 "set",
 235                 "toggle",
 236 #define REQ_GROUP(help)
 237 #define REQ_(req, help) #req
 238                 REQ_INFO,
 239 #undef  REQ_GROUP
 240 #undef  REQ_
 241                 NULL
 242         };
 243
 244         static int index, len;
 245         const char *name;
 246         char *match = NULL; /* No match */
 247
 248         /* If it is a new word to complete, initialize */
 249         if (!state) {
 250                 index = 0;
 251                 len = strlen(text);
 252         }
 253
 254         /* Return the next name which partially matches */
 255         while ((name = actions[index])) {
 256                 name = enum_name(name);
 257                 index++;
 258
 259                 if (strncmp(name, text, len) == 0) {
 260                         /* Ignore exact completion */
 261                         if (strlen(name) > len)
 262                                 match = strdup(name);
 263                         break;
 264                 }
 265         }
 266
 267         return match;
 268 }
 269
 270 static char *
 271 readline_set_generator(const char *text, int state)
 272 {
 273         static const char *words[] = {
 274 #define DEFINE_OPTION_NAME(name, type, flags) #name " = ",
 275                 OPTION_INFO(DEFINE_OPTION_NAME)
 276 #undef DEFINE_OPTION_NAME
 277                 NULL
 278         };
 279
 280         static int index, len;
 281         const char *name;
 282         char *match = NULL; /* No match */
 283
 284         /* If it is a new word to complete, initialize */
 285         if (!state) {
 286                 index = 0;
 287                 len = strlen(text);
 288         }
 289
 290         /* Return the next name which partially matches */
 291         while ((name = words[index])) {
 292                 name = enum_name(name);
 293                 index++;
 294
 295                 if (strncmp(name, text, len) == 0) {
 296                         /* Ignore exact completion */
 297                         if (strlen(name) > len)
 298                                 match = strdup(name);
 299                         break;
 300                 }
 301         }
 302
 303         return match;
 304 }
 305
 306 static char *
 307 readline_toggle_generator(const char *text, int state)
 308 {
 309         static const char **words;
 310         static int index, len;
 311         const char *name;
 312         char *match = NULL; /* No match */
 313
 314         if (!words) {
 315                 /* TODO: Only complete column options that are defined
 316                  * for the view. */
 317
 318 #define DEFINE_OPTION_WORD(name, type, flags) argv_append(&words, #name);
 319 #define DEFINE_COLUMN_OPTIONS_WORD(name, type, flags) #name,
 320 #define DEFINE_COLUMN_OPTIONS_WORDS(name, id, options) \
 321         { \
 322                 const char *vars[] = { \
 323                         options(DEFINE_COLUMN_OPTIONS_WORD) \
 324                 }; \
 325                 char buf[SIZEOF_STR]; \
 326                 int i; \
 327                 for (i = 0; i < ARRAY_SIZE(vars); i++) { \
 328                         if (enum_name_prefixed(buf, sizeof(buf), #name, vars[i])) \
 329                                 argv_append(&words, buf); \
 330                 } \
 331         }
 332
 333                 OPTION_INFO(DEFINE_OPTION_WORD)
 334                 COLUMN_OPTIONS(DEFINE_COLUMN_OPTIONS_WORDS);
 335         }
 336
 337         /* If it is a new word to complete, initialize */
 338         if (!state) {
 339                 index = 0;
 340                 len = strlen(text);
 341         }
 342
 343         /* Return the next name which partially matches */
 344         while ((name = words[index])) {
 345                 name = enum_name(name);
 346                 index++;
 347
 348                 if (strncmp(name, text, len) == 0) {
 349                         /* Ignore exact completion */
 350                         if (strlen(name) > len)
 351                                 match = strdup(name);
 352                         break;
 353                 }
 354         }
 355
 356         return match;
 357 }
 358
 359 static int
 360 readline_getc(FILE *stream)
 361 {
 362         return getc(opt_tty);
 363 }
 364
 365 static char **
 366 readline_completion(const char *text, int start, int end)
 367 {
 368         /* Do not append a space after a completion */
 369         rl_completion_suppress_append = 1;
 370
 371         /*
 372          * If the word is at the start of the line,
 373          * then it is a tig action to complete.
 374          */
 375         if (start == 0)
 376                 return rl_completion_matches(text, readline_action_generator);
 377
 378         /*
 379          * If the line begins with "toggle", then we complete toggle options.
 380          */
 381         if (start >= 7 && strncmp(rl_line_buffer, "toggle ", 7) == 0)
 382                 return rl_completion_matches(text, readline_toggle_generator);
 383
 384         /*
 385          * If the line begins with "set", then we complete set options.
 386          * (unless it is already completed)
 387          */
 388         if (start >= 4 && strncmp(rl_line_buffer, "set ", 4) == 0 &&
 389                         !strchr(rl_line_buffer, '='))
 390                 return rl_completion_matches(text, readline_set_generator);
 391
 392         /*
 393          * Otherwise it might be a variable name...
 394          */
 395         if (strncmp(text, "%(", 2) == 0)
 396                 return rl_completion_matches(text, readline_variable_generator);
 397
 398         /*
 399          * ... or finally fall back to filename completion.
 400          */
 401         return NULL;
 402 }
 403
 404 static void
 405 readline_display_matches(char **matches, int num_matches, int max_length)
 406 {
 407         unsigned int i;
 408
 409         wmove(status_win, 0, 0);
 410         waddstr(status_win, "matches: ");
 411
 412         /* matches[0] is the incomplete word */
 413         for (i = 1; i < num_matches + 1; ++i) {
 414                 waddstr(status_win, matches[i]);
 415                 waddch(status_win, ' ');
 416         }
 417
 418         wgetch(status_win);
 419         wrefresh(status_win);
 420 }
 421
 422 static void
 423 readline_init(void)
 424 {
 425         /* Allow conditional parsing of the ~/.inputrc file. */
 426         rl_readline_name = "tig";
 427
 428         /* Word break caracters (we removed '(' to match variables) */
 429         rl_basic_word_break_characters = " \t\n\"\\'`@$><=;|&{";
 430
 431         /* Custom display function */
 432         rl_redisplay_function = readline_display;
 433         rl_getc_function = readline_getc;
 434
 435         /* Completion support */
 436         rl_attempted_completion_function = readline_completion;
 437
 438         rl_completion_display_matches_hook = readline_display_matches;
 439 }
 440
 441 char *
 442 read_prompt(const char *prompt)
 443 {
 444         static char *line = NULL;
 445
 446         if (line) {
 447                 free(line);
 448                 line = NULL;
 449         }
 450
 451         line = readline(prompt);
 452         if (line && *line)
 453                 add_history(line);
 454
 455         return line;
 456 }
 457
 458 void
 459 prompt_init(void)
 460 {
 461         readline_init();
 462 }
 463 #else
 464 char *
 465 read_prompt(const char *prompt)
 466 {
 467         return read_prompt_incremental(prompt, TRUE, NULL, NULL);
 468 }
 469
 470 void
 471 prompt_init(void)
 472 {
 473 }
 474 #endif /* HAVE_READLINE */
 475
 476 bool
 477 prompt_menu(const char *prompt, const struct menu_item *items, int *selected)
 478 {
 479         enum input_status status = INPUT_OK;
 480         struct key key;
 481         int size = 0;
 482
 483         while (items[size].text)
 484                 size++;
 485
 486         assert(size > 0);
 487
 488         while (status == INPUT_OK) {
 489                 const struct menu_item *item = &items[*selected];
 490                 char hotkey[] = { '[', (char) item->hotkey, ']', ' ', 0 };
 491                 int i;
 492
 493                 update_status("%s (%d of %d) %s%s", prompt, *selected + 1, size,
 494                               item->hotkey ? hotkey : "", item->text);
 495
 496                 switch (get_input(COLS - 1, &key, FALSE)) {
 497                 case KEY_RETURN:
 498                 case KEY_ENTER:
 499                 case '\n':
 500                         status = INPUT_STOP;
 501                         break;
 502
 503                 case KEY_LEFT:
 504                 case KEY_UP:
 505                         *selected = *selected - 1;
 506                         if (*selected < 0)
 507                                 *selected = size - 1;
 508                         break;
 509
 510                 case KEY_RIGHT:
 511                 case KEY_DOWN:
 512                         *selected = (*selected + 1) % size;
 513                         break;
 514
 515                 case KEY_ESC:
 516                         status = INPUT_CANCEL;
 517                         break;
 518
 519                 default:
 520                         for (i = 0; items[i].text; i++)
 521                                 if (items[i].hotkey == key.data.bytes[0]) {
 522                                         *selected = i;
 523                                         status = INPUT_STOP;
 524                                         break;
 525                                 }
 526                 }
 527         }
 528
 529         report_clear();
 530
 531         return status != INPUT_CANCEL;
 532 }
 533
 534 struct prompt_toggle {
 535         const char *name;
 536         const char *type;
 537         enum view_flag flags;
 538         void *opt;
 539 };
 540
 541 static bool
 542 find_arg(const char *argv[], const char *arg)
 543 {
 544         int i;
 545
 546         for (i = 0; argv[i]; i++)
 547                 if (!strcmp(argv[i], arg))
 548                         return TRUE;
 549         return FALSE;
 550 }
 551
 552 static enum status_code
 553 prompt_toggle_option(struct view *view, const char *argv[], const char *prefix,
 554                      struct prompt_toggle *toggle, enum view_flag *flags)
 555 {
 556         char name[SIZEOF_STR];
 557
 558         if (!enum_name_prefixed(name, sizeof(name), prefix, toggle->name))
 559                 return error("Failed to toggle option %s", toggle->name);
 560
 561         *flags = toggle->flags;
 562
 563         if (!strcmp(toggle->type, "bool")) {
 564                 bool *opt = toggle->opt;
 565
 566                 *opt = !*opt;
 567                 if (opt == &opt_mouse)
 568                         enable_mouse(*opt);
 569                 return success("set %s = %s", name, *opt ? "yes" : "no");
 570
 571         } else if (!strncmp(toggle->type, "enum", 4)) {
 572                 const char *type = toggle->type + STRING_SIZE("enum ");
 573                 enum author *opt = toggle->opt;
 574                 const struct enum_map *map = find_enum_map(type);
 575
 576                 *opt = (*opt + 1) % map->size;
 577                 return success("set %s = %s", name, enum_name(map->entries[*opt].name));
 578
 579         } else if (!strcmp(toggle->type, "int")) {
 580                 const char *arg = argv[2] ? argv[2] : "1";
 581                 int diff = atoi(arg);
 582                 int *opt = toggle->opt;
 583
 584                 if (!diff)
 585                         diff = *arg == '-' ? -1 : 1;
 586
 587                 if (opt == &opt_diff_context && *opt < 0)
 588                         *opt = -*opt;
 589                 if (opt == &opt_diff_context && diff < 0) {
 590                         if (!*opt)
 591                                 return error("Diff context cannot be less than zero");
 592                         if (*opt < -diff)
 593                                 diff = -*opt;
 594                 }
 595
 596                 if (strstr(name, "commit-title-overflow")) {
 597                         *opt = *opt ? -*opt : 50;
 598                         if (*opt < 0)
 599                                 return success("set %s = no", name);
 600                         diff = 0;
 601                 }
 602
 603                 *opt += diff;
 604                 return success("set %s = %d", name, *opt);
 605
 606         } else if (!strcmp(toggle->type, "double")) {
 607                 const char *arg = argv[2] ? argv[2] : "1.0";
 608                 double *opt = toggle->opt;
 609                 int sign = 1;
 610                 double diff;
 611
 612                 if (*arg == '-') {
 613                         sign = -1;
 614                         arg++;
 615                 }
 616
 617                 if (parse_step(&diff, arg) != SUCCESS)
 618                         diff = strtod(arg, NULL);
 619
 620                 *opt += sign * diff;
 621                 return success("set %s = %.2f", name, *opt);
 622
 623         } else if (!strcmp(toggle->type, "const char **")) {
 624                 const char ***opt = toggle->opt;
 625                 bool found = TRUE;
 626                 int i;
 627
 628                 for (i = 2; argv[i]; i++) {
 629                         if (!find_arg(*opt, argv[i])) {
 630                                 found = FALSE;
 631                                 break;
 632                         }
 633                 }
 634
 635                 if (found) {
 636                         int next, pos;
 637
 638                         for (next = 0, pos = 0; (*opt)[pos]; pos++) {
 639                                 const char *arg = (*opt)[pos];
 640
 641                                 if (find_arg(argv + 2, arg)) {
 642                                         free((void *) arg);
 643                                         continue;
 644                                 }
 645                                 (*opt)[next++] = arg;
 646                         }
 647
 648                         (*opt)[next] = NULL;
 649
 650                 } else if (!argv_copy(opt, argv + 2)) {
 651                         return ERROR_OUT_OF_MEMORY;
 652                 }
 653                 return SUCCESS;
 654
 655         } else {
 656                 return error("Unsupported `:toggle %s` (%s)", name, toggle->type);
 657         }
 658 }
 659
 660 static struct prompt_toggle *
 661 find_prompt_toggle(struct prompt_toggle toggles[], size_t toggles_size,
 662                    const char *prefix, const char *name, size_t namelen)
 663 {
 664         char prefixed[SIZEOF_STR];
 665         int i;
 666
 667         if (*prefix && namelen == strlen(prefix) &&
 668             !string_enum_compare(prefix, name, namelen)) {
 669                 name = "display";
 670                 namelen = strlen(name);
 671         }
 672
 673         for (i = 0; i < toggles_size; i++) {
 674                 struct prompt_toggle *toggle = &toggles[i];
 675
 676                 if (namelen == strlen(toggle->name) &&
 677                     !string_enum_compare(toggle->name, name, namelen))
 678                         return toggle;
 679
 680                 if (enum_name_prefixed(prefixed, sizeof(prefixed), prefix, toggle->name) &&
 681                     namelen == strlen(prefixed) &&
 682                     !string_enum_compare(prefixed, name, namelen))
 683                         return toggle;
 684         }
 685
 686         return NULL;
 687 }
 688
 689 static enum status_code
 690 prompt_toggle(struct view *view, const char *argv[], enum view_flag *flags)
 691 {
 692         struct prompt_toggle option_toggles[] = {
 693 #define DEFINE_OPTION_TOGGLES(name, type, flags) { #name, #type, flags, &opt_ ## name },
 694                 OPTION_INFO(DEFINE_OPTION_TOGGLES)
 695         };
 696         const char *option = argv[1];
 697         size_t optionlen = option ? strlen(option) : 0;
 698         struct prompt_toggle *toggle;
 699         struct view_column *column;
 700
 701         if (!option)
 702                 return error("%s", "No option name given to :toggle");
 703
 704         if (enum_equals_static("sort-field", option, optionlen) ||
 705             enum_equals_static("sort-order", option, optionlen)) {
 706                 if (!view_has_flags(view, VIEW_SORTABLE)) {
 707                         return error("Sorting is not yet supported for the %s view", view->name);
 708                 } else {
 709                         bool sort_field = enum_equals_static("sort-field", option, optionlen);
 710                         struct sort_state *sort = &view->sort;
 711
 712                         sort_view(view, sort_field);
 713                         return success("set %s = %s", option,
 714                                 sort_field ? view_column_name(get_sort_field(view))
 715                                            : sort->reverse ? "descending" : "ascending");
 716                 }
 717         }
 718
 719         toggle = find_prompt_toggle(option_toggles, ARRAY_SIZE(option_toggles),
 720                                     "", option, optionlen);
 721         if (toggle)
 722                 return prompt_toggle_option(view, argv, "", toggle, flags);
 723
 724 #define DEFINE_COLUMN_OPTIONS_TOGGLE(name, type, flags) \
 725         { #name, #type, flags, &opt->name },
 726
 727 #define DEFINE_COLUMN_OPTIONS_CHECK(name, id, options) \
 728         if (column->type == VIEW_COLUMN_##id) { \
 729                 struct name##_options *opt = &column->opt.name; \
 730                 struct prompt_toggle toggles[] = { \
 731                         options(DEFINE_COLUMN_OPTIONS_TOGGLE) \
 732                 }; \
 733                 toggle = find_prompt_toggle(toggles, ARRAY_SIZE(toggles), #name, option, optionlen); \
 734                 if (toggle) \
 735                         return prompt_toggle_option(view, argv, #name, toggle, flags); \
 736         }
 737
 738         for (column = view->columns; column; column = column->next) {
 739                 COLUMN_OPTIONS(DEFINE_COLUMN_OPTIONS_CHECK);
 740         }
 741
 742         return error("`:toggle %s` not supported", option);
 743 }
 744
 745 enum request
 746 run_prompt_command(struct view *view, const char *argv[])
 747 {
 748         enum request request;
 749         const char *cmd = argv[0];
 750         size_t cmdlen = cmd ? strlen(cmd) : 0;
 751
 752         if (!cmd)
 753                 return REQ_NONE;
 754
 755         if (string_isnumber(cmd)) {
 756                 int lineno = view->pos.lineno + 1;
 757
 758                 if (parse_int(&lineno, cmd, 1, view->lines + 1) == SUCCESS) {
 759                         select_view_line(view, lineno - 1);
 760                         report_clear();
 761                 } else {
 762                         report("Unable to parse '%s' as a line number", cmd);
 763                 }
 764         } else if (iscommit(cmd)) {
 765                 int lineno;
 766
 767                 if (!(view->ops->column_bits & view_column_bit(ID))) {
 768                         report("Jumping to commits is not supported by the %s view", view->name);
 769                         return REQ_NONE;
 770                 }
 771
 772                 for (lineno = 0; lineno < view->lines; lineno++) {
 773                         struct view_column_data column_data = {};
 774                         struct line *line = &view->line[lineno];
 775
 776                         if (view->ops->get_column_data(view, line, &column_data) &&
 777                             column_data.id &&
 778                             !strncasecmp(column_data.id, cmd, cmdlen)) {
 779                                 string_ncopy(view->env->search, cmd, cmdlen);
 780                                 select_view_line(view, lineno);
 781                                 report_clear();
 782                                 return REQ_NONE;
 783                         }
 784                 }
 785
 786                 report("Unable to find commit '%s'", view->env->search);
 787                 return REQ_NONE;
 788
 789         } else if (cmdlen > 1 && (cmd[0] == '/' || cmd[0] == '?')) {
 790                 char search[SIZEOF_STR];
 791
 792                 if (!argv_to_string(argv, search, sizeof(search), " ")) {
 793                         report("Failed to copy search string");
 794                         return REQ_NONE;
 795                 }
 796
 797                 if (!strcmp(search + 1, view->env->search))
 798                         return cmd[0] == '/' ? REQ_FIND_NEXT : REQ_FIND_PREV;
 799
 800                 string_ncopy(view->env->search, search + 1, strlen(search + 1));
 801                 return cmd[0] == '/' ? REQ_SEARCH : REQ_SEARCH_BACK;
 802
 803         } else if (cmdlen > 1 && cmd[0] == '!') {
 804                 struct view *next = &pager_view;
 805                 bool copied;
 806
 807                 /* Trim the leading '!'. */
 808                 argv[0] = cmd + 1;
 809                 copied = argv_format(view->env, &next->argv, argv, FALSE, TRUE);
 810                 argv[0] = cmd;
 811
 812                 if (!copied) {
 813                         report("Argument formatting failed");
 814                 } else {
 815                         /* When running random commands, initially show the
 816                          * command in the title. However, it maybe later be
 817                          * overwritten if a commit line is selected. */
 818                         argv_to_string(next->argv, next->ref, sizeof(next->ref), " ");
 819
 820                         next->dir = NULL;
 821                         open_pager_view(view, OPEN_PREPARED | OPEN_WITH_STDERR);
 822                 }
 823
 824         } else if (!strcmp(cmd, "toggle")) {
 825                 enum view_flag flags = VIEW_NO_FLAGS;
 826                 enum status_code code = prompt_toggle(view, argv, &flags);
 827                 const char *action = get_status_message(code);
 828                 int i;
 829
 830                 if (code != SUCCESS) {
 831                         report("%s", action);
 832                         return REQ_NONE;
 833                 }
 834
 835                 if (flags & VIEW_RESET_DISPLAY) {
 836                         resize_display();
 837                         redraw_display(TRUE);
 838                 }
 839
 840                 foreach_displayed_view(view, i) {
 841                         if (view_has_flags(view, flags) && view_can_refresh(view))
 842                                 reload_view(view);
 843                         else
 844                                 redraw_view(view);
 845                 }
 846
 847                 if (*action)
 848                         report("%s", action);
 849
 850         } else {
 851                 struct key key = {};
 852
 853                 /* Try :<key> */
 854                 key.modifiers.multibytes = 1;
 855                 string_ncopy(key.data.bytes, cmd, cmdlen);
 856                 request = get_keybinding(view->keymap, &key, 1);
 857                 if (request != REQ_NONE)
 858                         return request;
 859
 860                 /* Try :<command> */
 861                 request = get_request(cmd);
 862                 if (request != REQ_UNKNOWN)
 863                         return request;
 864
 865                 if (set_option(argv[0], argv_size(argv + 1), &argv[1]) == SUCCESS) {
 866                         request = view_can_refresh(view) ? REQ_REFRESH : REQ_SCREEN_REDRAW;
 867                         if (!strcmp(cmd, "color"))
 868                                 init_colors();
 869                         resize_display();
 870                         redraw_display(TRUE);
 871                 }
 872                 return request;
 873         }
 874         return REQ_NONE;
 875 }
 876
 877 enum request
 878 open_prompt(struct view *view)
 879 {
 880         char *cmd = read_prompt(":");
 881         const char *argv[SIZEOF_ARG] = { NULL };
 882         int argc = 0;
 883
 884         if (cmd && !argv_from_string(argv, &argc, cmd)) {
 885                 report("Too many arguments");
 886                 return REQ_NONE;
 887         }
 888
 889         return run_prompt_command(view, argv);
 890 }
 891
 892 /* vim: set ts=8 sw=8 noexpandtab: */