src/tig.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 #define WARN_MISSING_CURSES_CONFIGURATION
  15
  16 #include "tig/tig.h"
  17 #include "tig/types.h"
  18 #include "tig/util.h"
  19 #include "tig/parse.h"
  20 #include "tig/io.h"
  21 #include "tig/argv.h"
  22 #include "tig/refdb.h"
  23 #include "tig/watch.h"
  24 #include "tig/graph.h"
  25 #include "tig/git.h"
  26 #include "tig/request.h"
  27 #include "tig/line.h"
  28 #include "tig/keys.h"
  29 #include "tig/view.h"
  30 #include "tig/repo.h"
  31 #include "tig/options.h"
  32 #include "tig/draw.h"
  33 #include "tig/display.h"
  34 #include "tig/prompt.h"
  35
  36 /* Views. */
  37 #include "tig/blame.h"
  38 #include "tig/blob.h"
  39 #include "tig/diff.h"
  40 #include "tig/grep.h"
  41 #include "tig/help.h"
  42 #include "tig/log.h"
  43 #include "tig/main.h"
  44 #include "tig/pager.h"
  45 #include "tig/refs.h"
  46 #include "tig/stage.h"
  47 #include "tig/stash.h"
  48 #include "tig/status.h"
  49 #include "tig/tree.h"
  50
  51 static bool
  52 forward_request_to_child(struct view *child, enum request request)
  53 {
  54         return displayed_views() == 2 && view_is_displayed(child) &&
  55                 !strcmp(child->vid, child->ops->id);
  56 }
  57
  58 static enum request
  59 view_request(struct view *view, enum request request)
  60 {
  61         if (!view || !view->lines)
  62                 return request;
  63
  64         if (request == REQ_ENTER && !opt_focus_child &&
  65             view_has_flags(view, VIEW_SEND_CHILD_ENTER)) {
  66                 struct view *child = display[1];
  67
  68                 if (forward_request_to_child(child, request)) {
  69                         view_request(child, request);
  70                         return REQ_NONE;
  71                 }
  72         }
  73
  74         if (request == REQ_REFRESH && !view_can_refresh(view)) {
  75                 report("This view can not be refreshed");
  76                 return REQ_NONE;
  77         }
  78
  79         return view->ops->request(view, request, &view->line[view->pos.lineno]);
  80 }
  81
  82 /*
  83  * Option management
  84  */
  85
  86 #define TOGGLE_MENU_INFO(_) \
  87         _('.', "line numbers",                  "line-number"), \
  88         _('D', "dates",                         "date"), \
  89         _('A', "author",                        "author"), \
  90         _('~', "graphics",                      "line-graphics"), \
  91         _('g', "revision graph",                "commit-title-graph"), \
  92         _('#', "file names",                    "file-name"), \
  93         _('*', "file sizes",                    "file-size"), \
  94         _('W', "space changes",                 "ignore-space"), \
  95         _('l', "commit order",                  "commit-order"), \
  96         _('F', "reference display",             "commit-title-refs"), \
  97         _('C', "local change display",          "show-changes"), \
  98         _('X', "commit ID display",             "id"), \
  99         _('%', "file filtering",                "file-filter"), \
 100         _('$', "commit title overflow display", "commit-title-overflow"), \
 101         _('d', "untracked directory info",      "status-untracked-dirs"), \
 102         _('|', "view split",                    "vertical-split"), \
 103
 104 static void
 105 toggle_option(struct view *view)
 106 {
 107         const struct menu_item menu[] = {
 108 #define DEFINE_TOGGLE_MENU(key, help, name) { key, help, name }
 109                 TOGGLE_MENU_INFO(DEFINE_TOGGLE_MENU)
 110                 { 0 }
 111         };
 112         const char *toggle_argv[] = { "toggle", NULL, NULL };
 113         int i = 0;
 114
 115         if (!prompt_menu("Toggle option", menu, &i))
 116                 return;
 117
 118         toggle_argv[1] = menu[i].data;
 119         run_prompt_command(view, toggle_argv);
 120 }
 121
 122
 123 /*
 124  * View opening
 125  */
 126
 127 static enum request
 128 open_run_request(struct view *view, enum request request)
 129 {
 130         struct run_request *req = get_run_request(request);
 131
 132         if (!req) {
 133                 report("Unknown run request");
 134                 return REQ_NONE;
 135         }
 136
 137         return exec_run_request(view, req);
 138 }
 139
 140 /*
 141  * User request switch noodle
 142  */
 143
 144 static int
 145 view_driver(struct view *view, enum request request)
 146 {
 147         int i;
 148
 149         if (request == REQ_NONE)
 150                 return TRUE;
 151
 152         if (request >= REQ_RUN_REQUESTS) {
 153                 request = open_run_request(view, request);
 154
 155                 // exit quickly rather than going through view_request and back
 156                 if (request == REQ_QUIT)
 157                         return FALSE;
 158         }
 159
 160         request = view_request(view, request);
 161         if (request == REQ_NONE)
 162                 return TRUE;
 163
 164         switch (request) {
 165         case REQ_MOVE_UP:
 166         case REQ_MOVE_DOWN:
 167         case REQ_MOVE_PAGE_UP:
 168         case REQ_MOVE_PAGE_DOWN:
 169         case REQ_MOVE_HALF_PAGE_UP:
 170         case REQ_MOVE_HALF_PAGE_DOWN:
 171         case REQ_MOVE_FIRST_LINE:
 172         case REQ_MOVE_LAST_LINE:
 173                 move_view(view, request);
 174                 break;
 175
 176         case REQ_SCROLL_FIRST_COL:
 177         case REQ_SCROLL_LEFT:
 178         case REQ_SCROLL_RIGHT:
 179         case REQ_SCROLL_LINE_DOWN:
 180         case REQ_SCROLL_LINE_UP:
 181         case REQ_SCROLL_PAGE_DOWN:
 182         case REQ_SCROLL_PAGE_UP:
 183         case REQ_SCROLL_WHEEL_DOWN:
 184         case REQ_SCROLL_WHEEL_UP:
 185                 scroll_view(view, request);
 186                 break;
 187
 188         case REQ_VIEW_GREP:
 189                 open_grep_view(view);
 190                 break;
 191
 192         case REQ_VIEW_MAIN:
 193                 open_main_view(view, OPEN_DEFAULT);
 194                 break;
 195         case REQ_VIEW_DIFF:
 196                 open_diff_view(view, OPEN_DEFAULT);
 197                 break;
 198         case REQ_VIEW_LOG:
 199                 open_log_view(view, OPEN_DEFAULT);
 200                 break;
 201         case REQ_VIEW_TREE:
 202                 open_tree_view(view, OPEN_DEFAULT);
 203                 break;
 204         case REQ_VIEW_HELP:
 205                 open_help_view(view, OPEN_DEFAULT);
 206                 break;
 207         case REQ_VIEW_REFS:
 208                 open_refs_view(view, OPEN_DEFAULT);
 209                 break;
 210         case REQ_VIEW_BLAME:
 211                 open_blame_view(view, OPEN_DEFAULT);
 212                 break;
 213         case REQ_VIEW_BLOB:
 214                 open_blob_view(view, OPEN_DEFAULT);
 215                 break;
 216         case REQ_VIEW_STATUS:
 217                 open_status_view(view, OPEN_DEFAULT);
 218                 break;
 219         case REQ_VIEW_STAGE:
 220                 open_stage_view(view, NULL, 0, OPEN_DEFAULT);
 221                 break;
 222         case REQ_VIEW_PAGER:
 223                 open_pager_view(view, OPEN_DEFAULT);
 224                 break;
 225         case REQ_VIEW_STASH:
 226                 open_stash_view(view, OPEN_DEFAULT);
 227                 break;
 228
 229         case REQ_NEXT:
 230         case REQ_PREVIOUS:
 231                 if (view->parent) {
 232                         int line;
 233
 234                         view = view->parent;
 235                         line = view->pos.lineno;
 236                         view_request(view, request);
 237                         move_view(view, request);
 238                         if (view_is_displayed(view))
 239                                 update_view_title(view);
 240                         if (line != view->pos.lineno)
 241                                 view_request(view, REQ_ENTER);
 242                 } else {
 243                         move_view(view, request);
 244                 }
 245                 break;
 246
 247         case REQ_VIEW_NEXT:
 248         {
 249                 int nviews = displayed_views();
 250                 int next_view = nviews ? (current_view + 1) % nviews : current_view;
 251
 252                 if (next_view == current_view) {
 253                         report("Only one view is displayed");
 254                         break;
 255                 }
 256
 257                 current_view = next_view;
 258                 /* Blur out the title of the previous view. */
 259                 update_view_title(view);
 260                 report_clear();
 261                 break;
 262         }
 263         case REQ_REFRESH:
 264                 report("Refreshing is not supported by the %s view", view->name);
 265                 break;
 266
 267         case REQ_PARENT:
 268                 report("Moving to parent is not supported by the the %s view", view->name);
 269                 break;
 270
 271         case REQ_BACK:
 272                 report("Going back is not supported for by %s view", view->name);
 273                 break;
 274
 275         case REQ_MAXIMIZE:
 276                 if (displayed_views() == 2)
 277                         maximize_view(view, TRUE);
 278                 break;
 279
 280         case REQ_OPTIONS:
 281                 toggle_option(view);
 282                 break;
 283
 284         case REQ_SEARCH:
 285         case REQ_SEARCH_BACK:
 286                 search_view(view, request);
 287                 break;
 288
 289         case REQ_FIND_NEXT:
 290         case REQ_FIND_PREV:
 291                 find_next(view, request);
 292                 break;
 293
 294         case REQ_STOP_LOADING:
 295                 foreach_view(view, i) {
 296                         if (view->pipe)
 297                                 report("Stopped loading the %s view", view->name),
 298                         end_update(view, TRUE);
 299                 }
 300                 break;
 301
 302         case REQ_SHOW_VERSION:
 303                 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
 304                 return TRUE;
 305
 306         case REQ_SCREEN_REDRAW:
 307                 redraw_display(TRUE);
 308                 break;
 309
 310         case REQ_EDIT:
 311                 report("Nothing to edit");
 312                 break;
 313
 314         case REQ_ENTER:
 315                 report("Nothing to enter");
 316                 break;
 317
 318         case REQ_VIEW_CLOSE:
 319                 /* XXX: Mark closed views by letting view->prev point to the
 320                  * view itself. Parents to closed view should never be
 321                  * followed. */
 322                 if (view->prev && view->prev != view) {
 323                         maximize_view(view->prev, TRUE);
 324                         view->prev = view;
 325                         watch_unregister(&view->watch);
 326                         break;
 327                 }
 328                 /* Fall-through */
 329         case REQ_QUIT:
 330                 return FALSE;
 331
 332         default:
 333                 report("Unknown key, press %s for help",
 334                        get_view_key(view, REQ_VIEW_HELP));
 335                 return TRUE;
 336         }
 337
 338         return TRUE;
 339 }
 340
 341 /*
 342  * Main
 343  */
 344
 345 static const char usage_string[] =
 346 "tig " TIG_VERSION " (" __DATE__ ")\n"
 347 "\n"
 348 "Usage: tig        [options] [revs] [--] [paths]\n"
 349 "   or: tig log    [options] [revs] [--] [paths]\n"
 350 "   or: tig show   [options] [revs] [--] [paths]\n"
 351 "   or: tig blame  [options] [rev] [--] path\n"
 352 "   or: tig grep   [options] [pattern]\n"
 353 "   or: tig refs\n"
 354 "   or: tig stash\n"
 355 "   or: tig status\n"
 356 "   or: tig <      [git command output]\n"
 357 "\n"
 358 "Options:\n"
 359 "  +<number>       Select line <number> in the first view\n"
 360 "  -v, --version   Show version and exit\n"
 361 "  -h, --help      Show help message and exit";
 362
 363 void
 364 usage(const char *message)
 365 {
 366         die("%s\n\n%s", message, usage_string);
 367 }
 368
 369 static int
 370 read_filter_args(char *name, size_t namelen, char *value, size_t valuelen, void *data)
 371 {
 372         const char ***filter_args = data;
 373
 374         return argv_append(filter_args, name) ? OK : ERR;
 375 }
 376
 377 static void
 378 filter_rev_parse(const char ***args, const char *arg1, const char *arg2, const char *argv[])
 379 {
 380         const char *rev_parse_argv[SIZEOF_ARG] = { "git", "rev-parse", arg1, arg2 };
 381         const char **all_argv = NULL;
 382
 383         if (!argv_append_array(&all_argv, rev_parse_argv) ||
 384             !argv_append_array(&all_argv, argv) ||
 385             io_run_load(all_argv, "\n", read_filter_args, args) == ERR)
 386                 die("Failed to split arguments");
 387         argv_free(all_argv);
 388         free(all_argv);
 389 }
 390
 391 static void
 392 filter_options(const char *argv[], bool rev_parse)
 393 {
 394         const char **flags = NULL;
 395         int next, flags_pos;
 396
 397         update_options_from_argv(argv);
 398
 399         if (!rev_parse) {
 400                 opt_cmdline_args = argv;
 401                 return;
 402         }
 403
 404         filter_rev_parse(&opt_file_args, "--no-revs", "--no-flags", argv);
 405         filter_rev_parse(&flags, "--flags", "--no-revs", argv);
 406
 407         if (flags) {
 408                 for (next = flags_pos = 0; flags && flags[next]; next++) {
 409                         const char *flag = flags[next];
 410
 411                         if (argv_parse_rev_flag(flag, NULL))
 412                                 argv_append(&opt_rev_args, flag);
 413                         else
 414                                 flags[flags_pos++] = flag;
 415                 }
 416
 417                 flags[flags_pos] = NULL;
 418
 419                 opt_cmdline_args = flags;
 420         }
 421
 422         filter_rev_parse(&opt_rev_args, "--symbolic", "--revs-only", argv);
 423 }
 424
 425 static enum request
 426 parse_options(int argc, const char *argv[], bool pager_mode)
 427 {
 428         enum request request;
 429         const char *subcommand;
 430         bool seen_dashdash = FALSE;
 431         bool rev_parse = TRUE;
 432         const char **filter_argv = NULL;
 433         int i;
 434
 435         request = pager_mode ? REQ_VIEW_PAGER : REQ_VIEW_MAIN;
 436
 437         if (argc <= 1)
 438                 return request;
 439
 440         subcommand = argv[1];
 441         if (!strcmp(subcommand, "status")) {
 442                 request = REQ_VIEW_STATUS;
 443
 444         } else if (!strcmp(subcommand, "blame")) {
 445                 request = REQ_VIEW_BLAME;
 446
 447         } else if (!strcmp(subcommand, "grep")) {
 448                 request = REQ_VIEW_GREP;
 449                 rev_parse = FALSE;
 450
 451         } else if (!strcmp(subcommand, "show")) {
 452                 request = REQ_VIEW_DIFF;
 453
 454         } else if (!strcmp(subcommand, "log")) {
 455                 request = REQ_VIEW_LOG;
 456
 457         } else if (!strcmp(subcommand, "stash")) {
 458                 request = REQ_VIEW_STASH;
 459
 460         } else if (!strcmp(subcommand, "refs")) {
 461                 request = REQ_VIEW_REFS;
 462
 463         } else {
 464                 subcommand = NULL;
 465         }
 466
 467         for (i = 1 + !!subcommand; i < argc; i++) {
 468                 const char *opt = argv[i];
 469
 470                 // stop parsing our options after -- and let rev-parse handle the rest
 471                 if (!seen_dashdash) {
 472                         if (!strcmp(opt, "--")) {
 473                                 seen_dashdash = TRUE;
 474                                 continue;
 475
 476                         } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
 477                                 printf("tig version %s\n", TIG_VERSION);
 478                                 exit(EXIT_SUCCESS);
 479
 480                         } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
 481                                 printf("%s\n", usage_string);
 482                                 exit(EXIT_SUCCESS);
 483
 484                         } else if (strlen(opt) >= 2 && *opt == '+' && string_isnumber(opt + 1)) {
 485                                 int lineno = atoi(opt + 1);
 486
 487                                 argv_env.lineno = lineno > 0 ? lineno - 1 : 0;
 488                                 continue;
 489
 490                         }
 491                 }
 492
 493                 if (!argv_append(&filter_argv, opt))
 494                         die("command too long");
 495         }
 496
 497         if (filter_argv)
 498                 filter_options(filter_argv, rev_parse);
 499
 500         return request;
 501 }
 502
 503 static enum request
 504 open_pager_mode(enum request request)
 505 {
 506         if (request == REQ_VIEW_PAGER) {
 507                 /* Detect if the user requested the main view. */
 508                 if (argv_contains(opt_rev_args, "--stdin")) {
 509                         open_main_view(NULL, OPEN_FORWARD_STDIN);
 510                 } else if (argv_contains(opt_cmdline_args, "--pretty=raw")) {
 511                         open_main_view(NULL, OPEN_STDIN);
 512                 } else {
 513                         open_pager_view(NULL, OPEN_STDIN);
 514                 }
 515
 516         } else if (request == REQ_VIEW_DIFF) {
 517                 if (argv_contains(opt_rev_args, "--stdin"))
 518                         open_diff_view(NULL, OPEN_FORWARD_STDIN);
 519                 else
 520                         open_diff_view(NULL, OPEN_STDIN);
 521
 522         } else {
 523                 close(STDIN_FILENO);
 524                 report("Ignoring stdin.");
 525                 return request;
 526         }
 527
 528         return REQ_NONE;
 529 }
 530
 531 #ifdef NCURSES_MOUSE_VERSION
 532 static struct view *
 533 find_clicked_view(MEVENT *event)
 534 {
 535         struct view *view;
 536         int i;
 537
 538         foreach_displayed_view (view, i) {
 539                 int beg_y = 0, beg_x = 0;
 540
 541                 getbegyx(view->win, beg_y, beg_x);
 542
 543                 if (beg_y <= event->y && event->y < beg_y + view->height
 544                     && beg_x <= event->x && event->x < beg_x + view->width) {
 545                         if (i != current_view) {
 546                                 current_view = i;
 547                         }
 548                         return view;
 549                 }
 550         }
 551
 552         return NULL;
 553 }
 554
 555 static enum request
 556 handle_mouse_event(void)
 557 {
 558         MEVENT event;
 559         struct view *view;
 560
 561         if (getmouse(&event) != OK)
 562                 return REQ_NONE;
 563
 564         view = find_clicked_view(&event);
 565         if (!view)
 566                 return REQ_NONE;
 567
 568         if (event.bstate & BUTTON2_PRESSED)
 569                 return REQ_SCROLL_WHEEL_DOWN;
 570
 571         if (event.bstate & BUTTON4_PRESSED)
 572                 return REQ_SCROLL_WHEEL_UP;
 573
 574         if (event.bstate & BUTTON1_PRESSED) {
 575                 if (event.y == view->pos.lineno - view->pos.offset) {
 576                         /* Click is on the same line, perform an "ENTER" */
 577                         return REQ_ENTER;
 578
 579                 } else {
 580                         int y = getbegy(view->win);
 581                         unsigned long lineno = (event.y - y) + view->pos.offset;
 582
 583                         select_view_line(view, lineno);
 584                         update_view_title(view);
 585                         report_clear();
 586                 }
 587         }
 588
 589         return REQ_NONE;
 590 }
 591 #endif
 592
 593 int
 594 main(int argc, const char *argv[])
 595 {
 596         const char *codeset = ENCODING_UTF8;
 597         bool pager_mode = !isatty(STDIN_FILENO);
 598         enum request request = parse_options(argc, argv, pager_mode);
 599         struct view *view;
 600
 601         prompt_init();
 602
 603         if (signal(SIGPIPE, SIG_IGN) == SIG_ERR)
 604                 die("Failed to setup signal handler");
 605
 606         if (setlocale(LC_ALL, "")) {
 607                 codeset = nl_langinfo(CODESET);
 608         }
 609
 610         if (load_repo_info() == ERR)
 611                 die("Failed to load repo info.");
 612
 613         if (load_options() == ERR)
 614                 die("Failed to load user config.");
 615
 616         if (load_git_config() == ERR)
 617                 die("Failed to load repo config.");
 618
 619         /* Require a git repository unless when running in pager mode. */
 620         if (!repo.git_dir[0] && request != REQ_VIEW_PAGER)
 621                 die("Not a git repository");
 622
 623         if (codeset && strcmp(codeset, ENCODING_UTF8)) {
 624                 char translit[SIZEOF_STR];
 625
 626                 if (string_format(translit, "%s%s", codeset, ICONV_TRANSLIT))
 627                         opt_iconv_out = iconv_open(translit, ENCODING_UTF8);
 628                 else
 629                         opt_iconv_out = iconv_open(codeset, ENCODING_UTF8);
 630                 if (opt_iconv_out == ICONV_NONE)
 631                         die("Failed to initialize character set conversion");
 632         }
 633
 634         if (load_refs(FALSE) == ERR)
 635                 die("Failed to load refs.");
 636
 637         init_display();
 638
 639         if (pager_mode)
 640                 request = open_pager_mode(request);
 641
 642         if (getenv("TIG_SCRIPT")) {
 643                 const char *script_command[] = { "script", getenv("TIG_SCRIPT"), NULL };
 644
 645                 run_prompt_command(NULL, script_command);
 646         }
 647
 648         while (view_driver(display[current_view], request)) {
 649                 struct key key;
 650                 int key_value = get_input(0, &key, TRUE);
 651
 652 #ifdef NCURSES_MOUSE_VERSION
 653                 if (key_value == KEY_MOUSE) {
 654                         request = handle_mouse_event();
 655                         continue;
 656                 }
 657 #endif
 658
 659                 view = display[current_view];
 660                 request = get_keybinding(view->keymap, &key, 1);
 661
 662                 /* Some low-level request handling. This keeps access to
 663                  * status_win restricted. */
 664                 switch (request) {
 665                 case REQ_NONE:
 666                         report("Unknown key, press %s for help",
 667                                get_view_key(view, REQ_VIEW_HELP));
 668                         break;
 669                 case REQ_PROMPT:
 670                         request = open_prompt(view);
 671                         break;
 672                 case REQ_SEARCH:
 673                 case REQ_SEARCH_BACK:
 674                 {
 675                         const char *prompt = request == REQ_SEARCH ? "/" : "?";
 676                         char *search = read_prompt(prompt);
 677
 678                         if (search)
 679                                 string_ncopy(argv_env.search, search, strlen(search));
 680                         else if (*argv_env.search)
 681                                 request = request == REQ_SEARCH ?
 682                                         REQ_FIND_NEXT :
 683                                         REQ_FIND_PREV;
 684                         else
 685                                 request = REQ_NONE;
 686                         break;
 687                 }
 688                 default:
 689                         break;
 690                 }
 691         }
 692
 693         exit(EXIT_SUCCESS);
 694
 695         return 0;
 696 }
 697
 698 /* vim: set ts=8 sw=8 noexpandtab: */