src/view.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/argv.h"
  16 #include "tig/repo.h"
  17 #include "tig/watch.h"
  18 #include "tig/options.h"
  19 #include "tig/view.h"
  20 #include "tig/draw.h"
  21 #include "tig/display.h"
  22
  23 /*
  24  * Navigation
  25  */
  26
  27 bool
  28 goto_view_line(struct view *view, unsigned long offset, unsigned long lineno)
  29 {
  30         if (lineno >= view->lines)
  31                 lineno = view->lines > 0 ? view->lines - 1 : 0;
  32
  33         if (offset > lineno || offset + view->height <= lineno) {
  34                 unsigned long half = view->height / 2;
  35
  36                 if (lineno > half)
  37                         offset = lineno - half;
  38                 else
  39                         offset = 0;
  40         }
  41
  42         if (offset != view->pos.offset || lineno != view->pos.lineno) {
  43                 view->pos.offset = offset;
  44                 view->pos.lineno = lineno;
  45                 return TRUE;
  46         }
  47
  48         return FALSE;
  49 }
  50
  51 /* Scrolling backend */
  52 void
  53 do_scroll_view(struct view *view, int lines)
  54 {
  55         bool redraw_current_line = FALSE;
  56
  57         /* The rendering expects the new offset. */
  58         view->pos.offset += lines;
  59
  60         assert(0 <= view->pos.offset && view->pos.offset < view->lines);
  61         assert(lines);
  62
  63         /* Move current line into the view. */
  64         if (view->pos.lineno < view->pos.offset) {
  65                 view->pos.lineno = view->pos.offset;
  66                 redraw_current_line = TRUE;
  67         } else if (view->pos.lineno >= view->pos.offset + view->height) {
  68                 view->pos.lineno = view->pos.offset + view->height - 1;
  69                 redraw_current_line = TRUE;
  70         }
  71
  72         assert(view->pos.offset <= view->pos.lineno && view->pos.lineno < view->lines);
  73
  74         /* Redraw the whole screen if scrolling is pointless. */
  75         if (view->height < ABS(lines)) {
  76                 redraw_view(view);
  77
  78         } else {
  79                 int line = lines > 0 ? view->height - lines : 0;
  80                 int end = line + ABS(lines);
  81
  82                 scrollok(view->win, TRUE);
  83                 wscrl(view->win, lines);
  84                 scrollok(view->win, FALSE);
  85
  86                 while (line < end && draw_view_line(view, line))
  87                         line++;
  88
  89                 if (redraw_current_line)
  90                         draw_view_line(view, view->pos.lineno - view->pos.offset);
  91                 wnoutrefresh(view->win);
  92         }
  93
  94         view->has_scrolled = TRUE;
  95         report_clear();
  96 }
  97
  98 /* Scroll frontend */
  99 void
 100 scroll_view(struct view *view, enum request request)
 101 {
 102         int lines = 1;
 103
 104         assert(view_is_displayed(view));
 105
 106         if (request == REQ_SCROLL_WHEEL_DOWN || request == REQ_SCROLL_WHEEL_UP)
 107                 lines = opt_mouse_scroll;
 108
 109         switch (request) {
 110         case REQ_SCROLL_FIRST_COL:
 111                 view->pos.col = 0;
 112                 redraw_view_from(view, 0);
 113                 report_clear();
 114                 return;
 115         case REQ_SCROLL_LEFT:
 116                 if (view->pos.col == 0) {
 117                         report("Cannot scroll beyond the first column");
 118                         return;
 119                 }
 120                 if (view->pos.col <= apply_step(opt_horizontal_scroll, view->width))
 121                         view->pos.col = 0;
 122                 else
 123                         view->pos.col -= apply_step(opt_horizontal_scroll, view->width);
 124                 redraw_view_from(view, 0);
 125                 report_clear();
 126                 return;
 127         case REQ_SCROLL_RIGHT:
 128                 view->pos.col += apply_step(opt_horizontal_scroll, view->width);
 129                 redraw_view(view);
 130                 report_clear();
 131                 return;
 132         case REQ_SCROLL_PAGE_DOWN:
 133                 lines = view->height;
 134         case REQ_SCROLL_WHEEL_DOWN:
 135         case REQ_SCROLL_LINE_DOWN:
 136                 if (view->pos.offset + lines > view->lines)
 137                         lines = view->lines - view->pos.offset;
 138
 139                 if (lines == 0 || view->pos.offset + view->height >= view->lines) {
 140                         report("Cannot scroll beyond the last line");
 141                         return;
 142                 }
 143                 break;
 144
 145         case REQ_SCROLL_PAGE_UP:
 146                 lines = view->height;
 147         case REQ_SCROLL_LINE_UP:
 148         case REQ_SCROLL_WHEEL_UP:
 149                 if (lines > view->pos.offset)
 150                         lines = view->pos.offset;
 151
 152                 if (lines == 0) {
 153                         report("Cannot scroll beyond the first line");
 154                         return;
 155                 }
 156
 157                 lines = -lines;
 158                 break;
 159
 160         default:
 161                 die("request %d not handled in switch", request);
 162         }
 163
 164         do_scroll_view(view, lines);
 165 }
 166
 167 /* Cursor moving */
 168 void
 169 move_view(struct view *view, enum request request)
 170 {
 171         int scroll_steps = 0;
 172         int steps;
 173
 174         switch (request) {
 175         case REQ_MOVE_FIRST_LINE:
 176                 steps = -view->pos.lineno;
 177                 break;
 178
 179         case REQ_MOVE_LAST_LINE:
 180                 steps = view->lines - view->pos.lineno - 1;
 181                 break;
 182
 183         case REQ_MOVE_PAGE_UP:
 184                 steps = view->height > view->pos.lineno
 185                       ? -view->pos.lineno : -view->height;
 186                 break;
 187
 188         case REQ_MOVE_PAGE_DOWN:
 189                 steps = view->pos.lineno + view->height >= view->lines
 190                       ? view->lines - view->pos.lineno - 1 : view->height;
 191                 break;
 192
 193         case REQ_MOVE_HALF_PAGE_UP:
 194                 steps = view->height / 2 > view->pos.lineno
 195                       ? -view->pos.lineno : -(view->height / 2);
 196                 break;
 197
 198         case REQ_MOVE_HALF_PAGE_DOWN:
 199                 steps = view->pos.lineno + view->height / 2 >= view->lines
 200                       ? view->lines - view->pos.lineno - 1 : view->height / 2;
 201                 break;
 202
 203         case REQ_MOVE_UP:
 204         case REQ_PREVIOUS:
 205                 steps = -1;
 206                 break;
 207
 208         case REQ_MOVE_DOWN:
 209         case REQ_NEXT:
 210                 steps = 1;
 211                 break;
 212
 213         default:
 214                 die("request %d not handled in switch", request);
 215         }
 216
 217         if (steps <= 0 && view->pos.lineno == 0) {
 218                 report("Cannot move beyond the first line");
 219                 return;
 220
 221         } else if (steps >= 0 && view->pos.lineno + 1 >= view->lines) {
 222                 report("Cannot move beyond the last line");
 223                 return;
 224         }
 225
 226         /* Move the current line */
 227         view->pos.lineno += steps;
 228         assert(0 <= view->pos.lineno && view->pos.lineno < view->lines);
 229
 230         /* Check whether the view needs to be scrolled */
 231         if (view->pos.lineno < view->pos.offset ||
 232             view->pos.lineno >= view->pos.offset + view->height) {
 233                 scroll_steps = steps;
 234                 if (steps < 0 && -steps > view->pos.offset) {
 235                         scroll_steps = -view->pos.offset;
 236
 237                 } else if (steps > 0) {
 238                         if (view->pos.lineno == view->lines - 1 &&
 239                             view->lines > view->height) {
 240                                 scroll_steps = view->lines - view->pos.offset - 1;
 241                                 if (scroll_steps >= view->height)
 242                                         scroll_steps -= view->height - 1;
 243                         }
 244                 }
 245         }
 246
 247         if (!view_is_displayed(view)) {
 248                 view->pos.offset += scroll_steps;
 249                 assert(0 <= view->pos.offset && view->pos.offset < view->lines);
 250                 view->ops->select(view, &view->line[view->pos.lineno]);
 251                 return;
 252         }
 253
 254         /* Repaint the old "current" line if we be scrolling */
 255         if (ABS(steps) < view->height)
 256                 draw_view_line(view, view->pos.lineno - steps - view->pos.offset);
 257
 258         if (scroll_steps) {
 259                 do_scroll_view(view, scroll_steps);
 260                 return;
 261         }
 262
 263         /* Draw the current line */
 264         draw_view_line(view, view->pos.lineno - view->pos.offset);
 265
 266         wnoutrefresh(view->win);
 267         report_clear();
 268 }
 269
 270 /*
 271  * Searching
 272  */
 273
 274 DEFINE_ALLOCATOR(realloc_unsigned_ints, unsigned int, 32)
 275
 276 bool
 277 grep_text(struct view *view, const char *text[])
 278 {
 279         regmatch_t pmatch;
 280         size_t i;
 281
 282         for (i = 0; text[i]; i++)
 283                 if (*text[i] && !regexec(view->regex, text[i], 1, &pmatch, 0))
 284                         return TRUE;
 285         return FALSE;
 286 }
 287
 288 void
 289 select_view_line(struct view *view, unsigned long lineno)
 290 {
 291         struct position old = view->pos;
 292
 293         if (goto_view_line(view, view->pos.offset, lineno)) {
 294                 if (view_is_displayed(view)) {
 295                         if (old.offset != view->pos.offset) {
 296                                 redraw_view(view);
 297                         } else {
 298                                 draw_view_line(view, old.lineno - view->pos.offset);
 299                                 draw_view_line(view, view->pos.lineno - view->pos.offset);
 300                                 wnoutrefresh(view->win);
 301                         }
 302                 } else {
 303                         view->ops->select(view, &view->line[view->pos.lineno]);
 304                 }
 305         }
 306 }
 307
 308 static bool
 309 find_matches(struct view *view)
 310 {
 311         size_t lineno;
 312
 313         /* Note, lineno is unsigned long so will wrap around in which case it
 314          * will become bigger than view->lines. */
 315         for (lineno = 0; lineno < view->lines; lineno++) {
 316                 if (!view->ops->grep(view, &view->line[lineno]))
 317                         continue;
 318
 319                 if (!realloc_unsigned_ints(&view->matched_line, view->matched_lines, 1))
 320                         return FALSE;
 321
 322                 view->matched_line[view->matched_lines++] = lineno;
 323         }
 324
 325         return TRUE;
 326 }
 327
 328 void
 329 find_next(struct view *view, enum request request)
 330 {
 331         int direction;
 332         size_t i;
 333
 334         if (!*view->grep) {
 335                 if (!*view->env->search)
 336                         report("No previous search");
 337                 else
 338                         search_view(view, request);
 339                 return;
 340         }
 341
 342         switch (request) {
 343         case REQ_SEARCH:
 344         case REQ_FIND_NEXT:
 345                 direction = 1;
 346                 break;
 347
 348         case REQ_SEARCH_BACK:
 349         case REQ_FIND_PREV:
 350                 direction = -1;
 351                 break;
 352
 353         default:
 354                 return;
 355         }
 356
 357         if (!view->matched_lines && !find_matches(view)) {
 358                 report("Allocation failure");
 359                 return;
 360         }
 361
 362         /* Note, `i` is unsigned and will wrap around in which case it
 363          * will become bigger than view->matched_lines. */
 364         i = direction > 0 ? 0 : view->matched_lines - 1;
 365         for (; i < view->matched_lines; i += direction) {
 366                 size_t lineno = view->matched_line[i];
 367
 368                 if (direction > 0 && lineno <= view->pos.lineno)
 369                         continue;
 370
 371                 if (direction < 0 && lineno >= view->pos.lineno)
 372                         continue;
 373
 374                 select_view_line(view, lineno);
 375                 report("Line %zu matches '%s' (%zu of %zu)", lineno + 1, view->grep, i + 1, view->matched_lines);
 376                 return;
 377         }
 378
 379         report("No match found for '%s'", view->grep);
 380 }
 381
 382 static void
 383 reset_matches(struct view *view)
 384 {
 385         free(view->matched_line);
 386         view->matched_line = NULL;
 387         view->matched_lines = 0;
 388 }
 389
 390 void
 391 search_view(struct view *view, enum request request)
 392 {
 393         int regex_err;
 394         int regex_flags = opt_ignore_case ? REG_ICASE : 0;
 395
 396         if (view->regex) {
 397                 regfree(view->regex);
 398                 *view->grep = 0;
 399         } else {
 400                 view->regex = calloc(1, sizeof(*view->regex));
 401                 if (!view->regex)
 402                         return;
 403         }
 404
 405         regex_err = regcomp(view->regex, view->env->search, REG_EXTENDED | regex_flags);
 406         if (regex_err != 0) {
 407                 char buf[SIZEOF_STR] = "unknown error";
 408
 409                 regerror(regex_err, view->regex, buf, sizeof(buf));
 410                 report("Search failed: %s", buf);
 411                 return;
 412         }
 413
 414         string_copy(view->grep, view->env->search);
 415
 416         reset_matches(view);
 417
 418         find_next(view, request);
 419 }
 420
 421 /*
 422  * View history
 423  */
 424
 425 static bool
 426 view_history_is_empty(struct view_history *history)
 427 {
 428         return !history->stack;
 429 }
 430
 431 struct view_state *
 432 push_view_history_state(struct view_history *history, struct position *position, void *data)
 433 {
 434         struct view_state *state = history->stack;
 435
 436         if (state && data && history->state_alloc &&
 437             !memcmp(state->data, data, history->state_alloc))
 438                 return NULL;
 439
 440         state = calloc(1, sizeof(*state) + history->state_alloc);
 441         if (!state)
 442                 return NULL;
 443
 444         state->prev = history->stack;
 445         history->stack = state;
 446         clear_position(&history->position);
 447         state->position = *position;
 448         state->data = &state[1];
 449         if (data && history->state_alloc)
 450                 memcpy(state->data, data, history->state_alloc);
 451         return state;
 452 }
 453
 454 bool
 455 pop_view_history_state(struct view_history *history, struct position *position, void *data)
 456 {
 457         struct view_state *state = history->stack;
 458
 459         if (view_history_is_empty(history))
 460                 return FALSE;
 461
 462         history->position = state->position;
 463         history->stack = state->prev;
 464
 465         if (data && history->state_alloc)
 466                 memcpy(data, state->data, history->state_alloc);
 467         if (position)
 468                 *position = state->position;
 469
 470         free(state);
 471         return TRUE;
 472 }
 473
 474 void
 475 reset_view_history(struct view_history *history)
 476 {
 477         while (pop_view_history_state(history, NULL, NULL))
 478                 ;
 479 }
 480
 481 /*
 482  * Incremental updating
 483  */
 484
 485 void
 486 reset_view(struct view *view)
 487 {
 488         int i;
 489
 490         for (i = 0; i < view->lines; i++)
 491                 free(view->line[i].data);
 492         free(view->line);
 493
 494         reset_matches(view);
 495         view->prev_pos = view->pos;
 496         /* A view without a previous view is the first view */
 497         if (!view->prev && !view->lines && view->prev_pos.lineno == 0)
 498                 view->prev_pos.lineno = view->env->lineno;
 499         clear_position(&view->pos);
 500
 501         if (view->columns)
 502                 view_column_reset(view);
 503
 504         view->line = NULL;
 505         view->lines  = 0;
 506         view->vid[0] = 0;
 507         view->custom_lines = 0;
 508         view->update_secs = 0;
 509 }
 510
 511 static bool
 512 restore_view_position(struct view *view)
 513 {
 514         /* Ensure that the view position is in a valid state. */
 515         if (!check_position(&view->prev_pos) ||
 516             (view->pipe && view->lines <= view->prev_pos.lineno))
 517                 return goto_view_line(view, view->pos.offset, view->pos.lineno);
 518
 519         /* Changing the view position cancels the restoring. */
 520         /* FIXME: Changing back to the first line is not detected. */
 521         if (check_position(&view->pos)) {
 522                 clear_position(&view->prev_pos);
 523                 return FALSE;
 524         }
 525
 526         if (goto_view_line(view, view->prev_pos.offset, view->prev_pos.lineno) &&
 527             view_is_displayed(view))
 528                 werase(view->win);
 529
 530         view->pos.col = view->prev_pos.col;
 531         clear_position(&view->prev_pos);
 532
 533         return TRUE;
 534 }
 535
 536 void
 537 end_update(struct view *view, bool force)
 538 {
 539         if (!view->pipe)
 540                 return;
 541         while (!view->ops->read(view, NULL))
 542                 if (!force)
 543                         return;
 544         if (force)
 545                 io_kill(view->pipe);
 546         io_done(view->pipe);
 547         view->pipe = NULL;
 548 }
 549
 550 static void
 551 setup_update(struct view *view, const char *vid)
 552 {
 553         reset_view(view);
 554         /* XXX: Do not use string_copy_rev(), it copies until first space. */
 555         string_ncopy(view->vid, vid, strlen(vid));
 556         view->pipe = &view->io;
 557         view->start_time = time(NULL);
 558 }
 559
 560 static bool
 561 view_no_refresh(struct view *view, enum open_flags flags)
 562 {
 563         bool reload = !!(flags & OPEN_ALWAYS_LOAD) || !view->lines;
 564
 565         return (!reload && !strcmp(view->vid, view->ops->id)) ||
 566                ((flags & OPEN_REFRESH) && !view_can_refresh(view));
 567 }
 568
 569 bool
 570 begin_update(struct view *view, const char *dir, const char **argv, enum open_flags flags)
 571 {
 572         bool extra = !!(flags & (OPEN_EXTRA));
 573         bool refresh = flags & (OPEN_REFRESH | OPEN_PREPARED | OPEN_STDIN);
 574         enum io_flags forward_stdin = (flags & OPEN_FORWARD_STDIN) ? IO_RD_FORWARD_STDIN : 0;
 575         enum io_flags with_stderr = (flags & OPEN_WITH_STDERR) ? IO_RD_WITH_STDERR : 0;
 576         enum io_flags io_flags = forward_stdin | with_stderr;
 577
 578         if (view_no_refresh(view, flags))
 579                 return TRUE;
 580
 581         if (view->pipe) {
 582                 if (extra)
 583                         io_done(view->pipe);
 584                 else
 585                         end_update(view, TRUE);
 586         }
 587
 588         view->unrefreshable = open_in_pager_mode(flags);
 589
 590         if (!refresh && argv) {
 591                 bool file_filter = !view_has_flags(view, VIEW_FILE_FILTER) || opt_file_filter;
 592
 593                 view->dir = dir;
 594                 if (!argv_format(view->env, &view->argv, argv, !view->prev, file_filter)) {
 595                         report("Failed to format %s arguments", view->name);
 596                         return FALSE;
 597                 }
 598
 599                 /* Put the current view ref value to the view title ref
 600                  * member. This is needed by the blob view. Most other
 601                  * views sets it automatically after loading because the
 602                  * first line is a commit line. */
 603                 string_copy_rev(view->ref, view->ops->id);
 604         }
 605
 606         if (view->argv && view->argv[0] &&
 607             !io_exec(&view->io, IO_RD, view->dir, opt_env, view->argv, io_flags)) {
 608                 report("Failed to open %s view", view->name);
 609                 return FALSE;
 610         }
 611
 612         if (open_from_stdin(flags)) {
 613                 if (!io_open(&view->io, "%s", ""))
 614                         die("Failed to open stdin");
 615         }
 616
 617         if (!extra)
 618                 setup_update(view, view->ops->id);
 619
 620         return TRUE;
 621 }
 622
 623 bool
 624 update_view(struct view *view)
 625 {
 626         /* Clear the view and redraw everything since the tree sorting
 627          * might have rearranged things. */
 628         bool redraw = view->lines == 0;
 629         bool can_read = TRUE;
 630         struct encoding *encoding = view->encoding ? view->encoding : default_encoding;
 631         struct buffer line;
 632
 633         if (!view->pipe)
 634                 return TRUE;
 635
 636         if (!io_can_read(view->pipe, FALSE)) {
 637                 if (view->lines == 0 && view_is_displayed(view)) {
 638                         time_t secs = time(NULL) - view->start_time;
 639
 640                         if (secs > 1 && secs > view->update_secs) {
 641                                 if (view->update_secs == 0)
 642                                         redraw_view(view);
 643                                 update_view_title(view);
 644                                 view->update_secs = secs;
 645                         }
 646                 }
 647                 return TRUE;
 648         }
 649
 650         for (; io_get(view->pipe, &line, '\n', can_read); can_read = FALSE) {
 651                 if (encoding && !encoding_convert(encoding, &line)) {
 652                         report("Encoding failure");
 653                         end_update(view, TRUE);
 654                         return FALSE;
 655                 }
 656
 657                 if (!view->ops->read(view, &line)) {
 658                         report("Allocation failure");
 659                         end_update(view, TRUE);
 660                         return FALSE;
 661                 }
 662         }
 663
 664         if (io_error(view->pipe)) {
 665                 report("Failed to read: %s", io_strerror(view->pipe));
 666                 end_update(view, TRUE);
 667
 668         } else if (io_eof(view->pipe)) {
 669                 end_update(view, FALSE);
 670         }
 671
 672         if (restore_view_position(view))
 673                 redraw = TRUE;
 674
 675         if (!view_is_displayed(view))
 676                 return TRUE;
 677
 678         if (redraw || view->force_redraw)
 679                 redraw_view_from(view, 0);
 680         else
 681                 redraw_view_dirty(view);
 682         view->force_redraw = FALSE;
 683
 684         /* Update the title _after_ the redraw so that if the redraw picks up a
 685          * commit reference in view->ref it'll be available here. */
 686         update_view_title(view);
 687         return TRUE;
 688 }
 689
 690 void
 691 update_view_title(struct view *view)
 692 {
 693         WINDOW *window = view->title;
 694         struct line *line = &view->line[view->pos.lineno];
 695         unsigned int view_lines, lines;
 696
 697         assert(view_is_displayed(view));
 698
 699         if (view == display[current_view])
 700                 wbkgdset(window, get_view_attr(view, LINE_TITLE_FOCUS));
 701         else
 702                 wbkgdset(window, get_view_attr(view, LINE_TITLE_BLUR));
 703
 704         werase(window);
 705         mvwprintw(window, 0, 0, "[%s]", view->name);
 706
 707         if (*view->ref) {
 708                 wprintw(window, " %s", view->ref);
 709         }
 710
 711         if (!view_has_flags(view, VIEW_CUSTOM_STATUS) && view_has_line(view, line) &&
 712             line->lineno) {
 713                 wprintw(window, " - %s %d of %zd",
 714                                            view->ops->type,
 715                                            line->lineno,
 716                                            view->lines - view->custom_lines);
 717         }
 718
 719         if (view->pipe) {
 720                 time_t secs = time(NULL) - view->start_time;
 721
 722                 /* Three git seconds are a long time ... */
 723                 if (secs > 2)
 724                         wprintw(window, " loading %lds", secs);
 725         }
 726
 727         view_lines = view->pos.offset + view->height;
 728         lines = view->lines ? MIN(view_lines, view->lines) * 100 / view->lines : 0;
 729         mvwprintw(window, 0, view->width - count_digits(lines) - 1, "%d%%", lines);
 730
 731         wnoutrefresh(window);
 732 }
 733
 734 /*
 735  * View opening
 736  */
 737
 738 void
 739 split_view(struct view *prev, struct view *view)
 740 {
 741         display[1] = view;
 742         current_view = opt_focus_child ? 1 : 0;
 743         view->parent = prev;
 744         resize_display();
 745
 746         if (prev->pos.lineno - prev->pos.offset >= prev->height) {
 747                 /* Take the title line into account. */
 748                 int lines = prev->pos.lineno - prev->pos.offset - prev->height + 1;
 749
 750                 /* Scroll the view that was split if the current line is
 751                  * outside the new limited view. */
 752                 do_scroll_view(prev, lines);
 753         }
 754
 755         if (view != prev && view_is_displayed(prev)) {
 756                 /* "Blur" the previous view. */
 757                 update_view_title(prev);
 758         }
 759 }
 760
 761 void
 762 maximize_view(struct view *view, bool redraw)
 763 {
 764         memset(display, 0, sizeof(display));
 765         current_view = 0;
 766         display[current_view] = view;
 767         resize_display();
 768         if (redraw) {
 769                 redraw_display(FALSE);
 770                 report_clear();
 771         }
 772 }
 773
 774 void
 775 load_view(struct view *view, struct view *prev, enum open_flags flags)
 776 {
 777         bool refresh = !view_no_refresh(view, flags);
 778
 779         /* When prev == view it means this is the first loaded view. */
 780         if (prev && view != prev) {
 781                 view->prev = prev;
 782         }
 783
 784         if (!refresh && view_can_refresh(view) &&
 785             watch_update_single(&view->watch, WATCH_EVENT_SWITCH_VIEW)) {
 786                 refresh = watch_dirty(&view->watch);
 787                 if (refresh)
 788                         flags |= OPEN_REFRESH;
 789         }
 790
 791         if (refresh) {
 792                 if (view->pipe)
 793                         end_update(view, TRUE);
 794                 if (view->ops->private_size) {
 795                         if (!view->private) {
 796                                 view->private = calloc(1, view->ops->private_size);
 797                         } else {
 798                                 if (view->ops->done)
 799                                         view->ops->done(view);
 800                                 memset(view->private, 0, view->ops->private_size);
 801                         }
 802                 }
 803
 804                 if (!view->ops->open(view, flags))
 805                         return;
 806         }
 807
 808         if (prev) {
 809                 bool split = !!(flags & OPEN_SPLIT);
 810
 811                 if (split) {
 812                         split_view(prev, view);
 813                 } else {
 814                         maximize_view(view, FALSE);
 815                 }
 816         }
 817
 818         restore_view_position(view);
 819
 820         if (view->pipe && view->lines == 0) {
 821                 /* Clear the old view and let the incremental updating refill
 822                  * the screen. */
 823                 werase(view->win);
 824                 /* Do not clear the position if it is the first view. */
 825                 if (view->prev && !(flags & (OPEN_RELOAD | OPEN_REFRESH)))
 826                         clear_position(&view->prev_pos);
 827                 report_clear();
 828         } else if (view_is_displayed(view)) {
 829                 redraw_view(view);
 830                 report_clear();
 831         }
 832 }
 833
 834 #define refresh_view(view) load_view(view, NULL, OPEN_REFRESH)
 835 #define reload_view(view) load_view(view, NULL, OPEN_RELOAD)
 836
 837 void
 838 open_view(struct view *prev, struct view *view, enum open_flags flags)
 839 {
 840         bool reload = !!(flags & (OPEN_RELOAD | OPEN_PREPARED));
 841         int nviews = displayed_views();
 842
 843         assert(flags ^ OPEN_REFRESH);
 844
 845         if (view == prev && nviews == 1 && !reload) {
 846                 report("Already in %s view", view->name);
 847                 return;
 848         }
 849
 850         if (!view_has_flags(view, VIEW_NO_GIT_DIR) && !repo.git_dir[0]) {
 851                 report("The %s view is disabled in pager mode", view->name);
 852                 return;
 853         }
 854
 855         if (!view->keymap)
 856                 view->keymap = get_keymap(view->name, strlen(view->name));
 857         load_view(view, prev ? prev : view, flags);
 858 }
 859
 860 void
 861 open_argv(struct view *prev, struct view *view, const char *argv[], const char *dir, enum open_flags flags)
 862 {
 863         if (view->pipe)
 864                 end_update(view, TRUE);
 865         view->dir = dir;
 866
 867         if (!argv_copy(&view->argv, argv)) {
 868                 report("Failed to open %s view: %s", view->name, io_strerror(&view->io));
 869         } else {
 870                 open_view(prev, view, flags | OPEN_PREPARED);
 871         }
 872 }
 873
 874 /*
 875  * Various utilities.
 876  */
 877
 878 static struct view *sorting_view;
 879
 880 #define apply_comparator(cmp, o1, o2) \
 881         (!(o1) || !(o2)) ? !!(o2) - !!(o1) : cmp(o1, o2)
 882
 883 #define number_compare(size1, size2)    (*(size1) - *(size2))
 884
 885 #define mode_is_dir(mode)               ((mode) && S_ISDIR(*(mode)))
 886
 887 static int
 888 compare_view_column(enum view_column_type column, bool use_file_mode,
 889                     const struct line *line1, struct view_column_data *column_data1,
 890                     const struct line *line2, struct view_column_data *column_data2)
 891 {
 892         switch (column) {
 893         case VIEW_COLUMN_AUTHOR:
 894                 return apply_comparator(ident_compare, column_data1->author, column_data2->author);
 895
 896         case VIEW_COLUMN_DATE:
 897                 return apply_comparator(timecmp, column_data1->date, column_data2->date);
 898
 899         case VIEW_COLUMN_ID:
 900                 if (column_data1->reflog && column_data2->reflog)
 901                         return apply_comparator(strcmp, column_data1->reflog, column_data2->reflog);
 902                 return apply_comparator(strcmp, column_data1->id, column_data2->id);
 903
 904         case VIEW_COLUMN_FILE_NAME:
 905                 if (use_file_mode && mode_is_dir(column_data1->mode) != mode_is_dir(column_data2->mode))
 906                         return mode_is_dir(column_data1->mode) ? -1 : 1;
 907                 return apply_comparator(strcmp, column_data1->file_name, column_data2->file_name);
 908
 909         case VIEW_COLUMN_FILE_SIZE:
 910                 return apply_comparator(number_compare, column_data1->file_size, column_data2->file_size);
 911
 912         case VIEW_COLUMN_LINE_NUMBER:
 913                 return line1->lineno - line2->lineno;
 914
 915         case VIEW_COLUMN_MODE:
 916                 return apply_comparator(number_compare, column_data1->mode, column_data2->mode);
 917
 918         case VIEW_COLUMN_REF:
 919                 return apply_comparator(ref_compare, column_data1->ref, column_data2->ref);
 920
 921         case VIEW_COLUMN_COMMIT_TITLE:
 922                 return apply_comparator(strcmp, column_data1->commit_title, column_data2->commit_title);
 923
 924         case VIEW_COLUMN_SECTION:
 925                 return apply_comparator(strcmp, column_data1->section->opt.section.text,
 926                                                 column_data2->section->opt.section.text);
 927
 928         case VIEW_COLUMN_STATUS:
 929                 return apply_comparator(number_compare, column_data1->status, column_data2->status);
 930
 931         case VIEW_COLUMN_TEXT:
 932                 return apply_comparator(strcmp, column_data1->text, column_data2->text);
 933         }
 934
 935         return 0;
 936 }
 937
 938 static enum view_column_type view_column_order[] = {
 939         VIEW_COLUMN_FILE_NAME,
 940         VIEW_COLUMN_STATUS,
 941         VIEW_COLUMN_MODE,
 942         VIEW_COLUMN_FILE_SIZE,
 943         VIEW_COLUMN_DATE,
 944         VIEW_COLUMN_AUTHOR,
 945         VIEW_COLUMN_COMMIT_TITLE,
 946         VIEW_COLUMN_LINE_NUMBER,
 947         VIEW_COLUMN_SECTION,
 948         VIEW_COLUMN_TEXT,
 949         VIEW_COLUMN_REF,
 950         VIEW_COLUMN_ID,
 951 };
 952
 953 static int
 954 sort_view_compare(const void *l1, const void *l2)
 955 {
 956         const struct line *line1 = l1;
 957         const struct line *line2 = l2;
 958         struct view_column_data column_data1 = {};
 959         struct view_column_data column_data2 = {};
 960         struct sort_state *sort = &sorting_view->sort;
 961         enum view_column_type column = get_sort_field(sorting_view);
 962         int cmp;
 963         int i;
 964
 965         if (!sorting_view->ops->get_column_data(sorting_view, line1, &column_data1))
 966                 return -1;
 967         else if (!sorting_view->ops->get_column_data(sorting_view, line2, &column_data2))
 968                 return 1;
 969
 970         cmp = compare_view_column(column, TRUE, line1, &column_data1, line2, &column_data2);
 971
 972         /* Ensure stable sorting by ordering ordering by the other
 973          * columns if the selected column values are equal. */
 974         for (i = 0; !cmp && i < ARRAY_SIZE(view_column_order); i++)
 975                 if (column != view_column_order[i])
 976                         cmp = compare_view_column(view_column_order[i], FALSE,
 977                                                   line1, &column_data1,
 978                                                   line2, &column_data2);
 979
 980         return sort->reverse ? -cmp : cmp;
 981 }
 982
 983 void
 984 sort_view(struct view *view, bool change_field)
 985 {
 986         struct sort_state *state = &view->sort;
 987
 988         if (change_field) {
 989                 while (TRUE) {
 990                         state->current = state->current->next
 991                                 ? state->current->next : view->columns;
 992                         if (get_sort_field(view) == VIEW_COLUMN_ID &&
 993                             !state->current->opt.id.display)
 994                                 continue;
 995                         break;
 996                 }
 997         } else {
 998                 state->reverse = !state->reverse;
 999         }
1000
1001         sorting_view = view;
1002         qsort(view->line, view->lines, sizeof(*view->line), sort_view_compare);
1003 }
1004
1005 static const char *
1006 view_column_text(struct view *view, struct view_column_data *column_data,
1007                  struct view_column *column)
1008 {
1009         const char *text = "";
1010
1011         switch (column->type) {
1012         case VIEW_COLUMN_AUTHOR:
1013                 if (column_data->author)
1014                         text = mkauthor(column_data->author, column->opt.author.width, column->opt.author.display);
1015                 break;
1016
1017         case VIEW_COLUMN_COMMIT_TITLE:
1018                 text = column_data->commit_title;
1019                 break;
1020
1021         case VIEW_COLUMN_DATE:
1022                 if (column_data->date)
1023                         text = mkdate(column_data->date, column->opt.date.display);
1024                 break;
1025
1026         case VIEW_COLUMN_REF:
1027                 if (column_data->ref)
1028                         text = column_data->ref->name;
1029                 break;
1030
1031         case VIEW_COLUMN_FILE_NAME:
1032                 if (column_data->file_name)
1033                         text = column_data->file_name;
1034                 break;
1035
1036         case VIEW_COLUMN_FILE_SIZE:
1037                 if (column_data->file_size)
1038                         text = mkfilesize(*column_data->file_size, column->opt.file_size.display);
1039                 break;
1040
1041         case VIEW_COLUMN_ID:
1042                 if (column->opt.id.display)
1043                         text = column_data->reflog ? column_data->reflog : column_data->id;
1044                 break;
1045
1046         case VIEW_COLUMN_LINE_NUMBER:
1047                 break;
1048
1049         case VIEW_COLUMN_MODE:
1050                 if (column_data->mode)
1051                         text = mkmode(*column_data->mode);
1052                 break;
1053
1054         case VIEW_COLUMN_STATUS:
1055                 if (column_data->status)
1056                         text = mkstatus(*column_data->status, column->opt.status.display);
1057                 break;
1058
1059         case VIEW_COLUMN_SECTION:
1060                 text = column_data->section->opt.section.text;
1061                 break;
1062
1063         case VIEW_COLUMN_TEXT:
1064                 text = column_data->text;
1065                 break;
1066         }
1067
1068         return text ? text : "";
1069 }
1070
1071 static bool
1072 grep_refs(struct view *view, struct view_column *column, const struct ref_list *list)
1073 {
1074         regmatch_t pmatch;
1075         size_t i;
1076
1077         if (!list)
1078                 return FALSE;
1079
1080         for (i = 0; i < list->size; i++) {
1081                 if (!regexec(view->regex, list->refs[i]->name, 1, &pmatch, 0))
1082                         return TRUE;
1083         }
1084
1085         return FALSE;
1086 }
1087
1088 bool
1089 view_column_grep(struct view *view, struct line *line)
1090 {
1091         struct view_column_data column_data = {};
1092         bool ok = view->ops->get_column_data(view, line, &column_data);
1093         struct view_column *column;
1094
1095         if (!ok)
1096                 return FALSE;
1097
1098         for (column = view->columns; column; column = column->next) {
1099                 const char *text[] = {
1100                         view_column_text(view, &column_data, column),
1101                         NULL
1102                 };
1103
1104                 if (grep_text(view, text))
1105                         return TRUE;
1106
1107                 if (column->type == VIEW_COLUMN_COMMIT_TITLE &&
1108                     column->opt.commit_title.refs &&
1109                     grep_refs(view, column, column_data.refs))
1110                         return TRUE;
1111         }
1112
1113         return FALSE;
1114 }
1115
1116 bool
1117 view_column_info_changed(struct view *view, bool update)
1118 {
1119         struct view_column *column;
1120         bool changed = FALSE;
1121
1122         for (column = view->columns; column; column = column->next) {
1123                 if (memcmp(&column->prev_opt, &column->opt, sizeof(column->opt))) {
1124                         if (!update)
1125                                 return TRUE;
1126                         column->prev_opt = column->opt;
1127                         changed = TRUE;
1128                 }
1129         }
1130
1131         return changed;
1132 }
1133
1134 void
1135 view_column_reset(struct view *view)
1136 {
1137         struct view_column *column;
1138
1139         view_column_info_changed(view, TRUE);
1140         for (column = view->columns; column; column = column->next)
1141                 column->width = 0;
1142 }
1143
1144 static enum status_code
1145 parse_view_column_config(char **pos, const char **name, const char **value, bool first)
1146 {
1147         size_t len = strcspn(*pos, ",");
1148         size_t optlen;
1149
1150         if (strlen(*pos) > len)
1151                 (*pos)[len] = 0;
1152         optlen = strcspn(*pos, ":=");
1153
1154         if (first) {
1155                 *name = "display";
1156
1157                 if (optlen == len) {
1158                         *value = len ? *pos : "yes";
1159                         *pos += len + 1;
1160                         return SUCCESS;
1161                 }
1162
1163                 /* Fake boolean enum value. */
1164                 *value = "yes";
1165                 return SUCCESS;
1166         }
1167
1168         *name = *pos;
1169         if (optlen == len)
1170                 *value = "yes";
1171         else
1172                 *value = *pos + optlen + 1;
1173         (*pos)[optlen] = 0;
1174         *pos += len + 1;
1175
1176         return SUCCESS;
1177 }
1178
1179 static enum status_code
1180 parse_view_column_option(struct view_column *column,
1181                          const char *opt_name, const char *opt_value)
1182 {
1183 #define DEFINE_COLUMN_OPTION_INFO(name, type, flags) \
1184         { #name, STRING_SIZE(#name), #type, &opt->name },
1185
1186 #define DEFINE_COLUMN_OPTIONS_PARSE(name, id, options) \
1187         if (column->type == VIEW_COLUMN_##id) { \
1188                 struct name##_options *opt = &column->opt.name; \
1189                 struct option_info info[] = { \
1190                         options(DEFINE_COLUMN_OPTION_INFO) \
1191                 }; \
1192                 struct option_info *option = find_option_info(info, ARRAY_SIZE(info), opt_name); \
1193                 if (!option) \
1194                         return error("Unknown option `%s' for column %s", opt_name, \
1195                                      view_column_name(VIEW_COLUMN_##id)); \
1196                 return parse_option(option, #name, opt_value); \
1197         }
1198
1199         COLUMN_OPTIONS(DEFINE_COLUMN_OPTIONS_PARSE);
1200
1201         return error("Unknown view column option: %s", opt_name);
1202 }
1203
1204 static enum status_code
1205 parse_view_column_type(struct view_column *column, const char **arg)
1206 {
1207         enum view_column_type type;
1208         size_t typelen = strcspn(*arg, ":,");
1209
1210         for (type = 0; type < view_column_type_map->size; type++)
1211                 if (enum_equals(view_column_type_map->entries[type], *arg, typelen)) {
1212                         *arg += typelen + !!(*arg)[typelen];
1213                         column->type = type;
1214                         return SUCCESS;
1215                 }
1216
1217         return error("Failed to parse view column type: %.*s", (int) typelen, *arg);
1218 }
1219
1220 static struct view *
1221 find_view(const char *view_name)
1222 {
1223         struct view *view;
1224         int i;
1225
1226         foreach_view(view, i)
1227                 if (!strncmp(view_name, view->name, strlen(view->name)))
1228                         return view;
1229
1230         return NULL;
1231 }
1232
1233 enum status_code
1234 parse_view_config(const char *view_name, const char *argv[])
1235 {
1236         enum status_code code = SUCCESS;
1237         size_t size = argv_size(argv);
1238         struct view_column *columns;
1239         struct view_column *column;
1240         struct view *view = find_view(view_name);
1241         int i;
1242
1243         if (!view)
1244                 return error("Unknown view: %s", view_name);
1245
1246         columns = calloc(size, sizeof(*columns));
1247         if (!columns)
1248                 return ERROR_OUT_OF_MEMORY;
1249
1250         for (i = 0, column = NULL; code == SUCCESS && i < size; i++) {
1251                 const char *arg = argv[i];
1252                 char buf[SIZEOF_STR] = "";
1253                 char *pos, *end;
1254                 bool first = TRUE;
1255
1256                 if (column)
1257                         column->next = &columns[i];
1258                 column = &columns[i];
1259
1260                 code = parse_view_column_type(column, &arg);
1261                 if (code != SUCCESS)
1262                         break;
1263
1264                 if (!(view->ops->column_bits & (1 << column->type)))
1265                         return error("The %s view does not support %s column", view->name,
1266                                      view_column_name(column->type));
1267
1268                 if ((column->type == VIEW_COLUMN_TEXT ||
1269                      column->type == VIEW_COLUMN_COMMIT_TITLE) &&
1270                      i + 1 < size)
1271                         return error("The %s column must always be last",
1272                                      view_column_name(column->type));
1273
1274                 string_ncopy(buf, arg, strlen(arg));
1275
1276                 for (pos = buf, end = pos + strlen(pos); code == SUCCESS && pos <= end; first = FALSE) {
1277                         const char *name = NULL;
1278                         const char *value = NULL;
1279
1280                         code = parse_view_column_config(&pos, &name, &value, first);
1281                         if (code == SUCCESS)
1282                                 code = parse_view_column_option(column, name, value);
1283                 }
1284
1285                 column->prev_opt = column->opt;
1286         }
1287
1288         if (code == SUCCESS) {
1289                 free(view->columns);
1290                 view->columns = columns;
1291                 view->sort.current = view->columns;
1292         } else {
1293                 free(columns);
1294         }
1295
1296         return code;
1297 }
1298
1299 struct view_column *
1300 get_view_column(struct view *view, enum view_column_type type)
1301 {
1302         struct view_column *column;
1303
1304         for (column = view->columns; column; column = column->next)
1305                 if (column->type == type)
1306                         return column;
1307         return NULL;
1308 }
1309
1310 bool
1311 view_column_info_update(struct view *view, struct line *line)
1312 {
1313         struct view_column_data column_data = {};
1314         struct view_column *column;
1315         bool changed = FALSE;
1316
1317         if (!view->ops->get_column_data(view, line, &column_data))
1318                 return FALSE;
1319
1320         for (column = view->columns; column; column = column->next) {
1321                 const char *text = view_column_text(view, &column_data, column);
1322                 int width = 0;
1323
1324                 switch (column->type) {
1325                 case VIEW_COLUMN_AUTHOR:
1326                         width = column->opt.author.width;
1327                         break;
1328
1329                 case VIEW_COLUMN_COMMIT_TITLE:
1330                         width = column->opt.commit_title.width;
1331                         break;
1332
1333                 case VIEW_COLUMN_DATE:
1334                         width = column->opt.date.width;
1335                         break;
1336
1337                 case VIEW_COLUMN_FILE_NAME:
1338                         width = column->opt.file_name.width;
1339                         break;
1340
1341                 case VIEW_COLUMN_FILE_SIZE:
1342                         width = column->opt.file_size.width;
1343                         break;
1344
1345                 case VIEW_COLUMN_ID:
1346                         width = column->opt.id.width;
1347                         if (!width)
1348                                 width = opt_id_width;
1349                         if (!column_data.reflog && !width)
1350                                 width = 7;
1351                         break;
1352
1353                 case VIEW_COLUMN_LINE_NUMBER:
1354                         if (column_data.line_number)
1355                                 width = count_digits(*column_data.line_number);
1356                         else
1357                                 width = count_digits(view->lines);
1358                         if (width < 3)
1359                                 width = 3;
1360                         break;
1361
1362                 case VIEW_COLUMN_MODE:
1363                         width = column->opt.mode.width;
1364                         break;
1365
1366                 case VIEW_COLUMN_REF:
1367                         width = column->opt.ref.width;
1368                         break;
1369
1370                 case VIEW_COLUMN_SECTION:
1371                         break;
1372
1373                 case VIEW_COLUMN_STATUS:
1374                         width = column->opt.status.width;
1375                         break;
1376
1377                 case VIEW_COLUMN_TEXT:
1378                         width = column->opt.text.width;
1379                         break;
1380                 }
1381
1382                 if (*text && !width)
1383                         width = utf8_width(text);
1384
1385                 if (width > column->width) {
1386                         column->width = width;
1387                         changed = TRUE;
1388                 }
1389         }
1390
1391         if (changed)
1392                 view->force_redraw = TRUE;
1393         return changed;
1394 }
1395
1396 struct line *
1397 find_line_by_type(struct view *view, struct line *line, enum line_type type, int direction)
1398 {
1399         for (; view_has_line(view, line); line += direction)
1400                 if (line->type == type)
1401                         return line;
1402
1403         return NULL;
1404 }
1405
1406 /*
1407  * Line utilities.
1408  */
1409
1410 DEFINE_ALLOCATOR(realloc_lines, struct line, 256)
1411
1412 struct line *
1413 add_line_at(struct view *view, unsigned long pos, const void *data, enum line_type type, size_t data_size, bool custom)
1414 {
1415         struct line *line;
1416         unsigned long lineno;
1417
1418         if (!realloc_lines(&view->line, view->lines, 1))
1419                 return NULL;
1420
1421         if (data_size) {
1422                 void *alloc_data = calloc(1, data_size);
1423
1424                 if (!alloc_data)
1425                         return NULL;
1426
1427                 if (data)
1428                         memcpy(alloc_data, data, data_size);
1429                 data = alloc_data;
1430         }
1431
1432         if (pos < view->lines) {
1433                 view->lines++;
1434                 line = view->line + pos;
1435                 lineno = line->lineno;
1436
1437                 memmove(line + 1, line, (view->lines - pos) * sizeof(*view->line));
1438                 while (pos < view->lines) {
1439                         view->line[pos].lineno++;
1440                         view->line[pos++].dirty = 1;
1441                 }
1442         } else {
1443                 line = &view->line[view->lines++];
1444                 lineno = view->lines - view->custom_lines;
1445         }
1446
1447         memset(line, 0, sizeof(*line));
1448         line->type = type;
1449         line->data = (void *) data;
1450         line->dirty = 1;
1451
1452         if (custom)
1453                 view->custom_lines++;
1454         else
1455                 line->lineno = lineno;
1456
1457         return line;
1458 }
1459
1460 struct line *
1461 add_line(struct view *view, const void *data, enum line_type type, size_t data_size, bool custom)
1462 {
1463         return add_line_at(view, view->lines, data, type, data_size, custom);
1464 }
1465
1466 struct line *
1467 add_line_alloc_(struct view *view, void **ptr, enum line_type type, size_t data_size, bool custom)
1468 {
1469         struct line *line = add_line(view, NULL, type, data_size, custom);
1470
1471         if (line)
1472                 *ptr = line->data;
1473         return line;
1474 }
1475
1476 struct line *
1477 add_line_nodata(struct view *view, enum line_type type)
1478 {
1479         return add_line(view, NULL, type, 0, FALSE);
1480 }
1481
1482 struct line *
1483 add_line_text(struct view *view, const char *text, enum line_type type)
1484 {
1485         struct line *line = add_line(view, text, type, strlen(text) + 1, FALSE);
1486
1487         if (line && view->ops->column_bits)
1488                 view_column_info_update(view, line);
1489         return line;
1490 }
1491
1492 struct line * PRINTF_LIKE(3, 4)
1493 add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
1494 {
1495         char buf[SIZEOF_STR];
1496         int retval;
1497
1498         FORMAT_BUFFER(buf, sizeof(buf), fmt, retval, FALSE);
1499         return retval >= 0 ? add_line_text(view, buf, type) : NULL;
1500 }
1501
1502 /*
1503  * Global view state.
1504  */
1505
1506 /* Included last to not pollute the rest of the file. */
1507 #include "tig/main.h"
1508 #include "tig/diff.h"
1509 #include "tig/log.h"
1510 #include "tig/tree.h"
1511 #include "tig/blob.h"
1512 #include "tig/blame.h"
1513 #include "tig/refs.h"
1514 #include "tig/status.h"
1515 #include "tig/stage.h"
1516 #include "tig/stash.h"
1517 #include "tig/grep.h"
1518 #include "tig/pager.h"
1519 #include "tig/help.h"
1520
1521 static struct view *views[] = {
1522 #define VIEW_DATA(id, name) &name##_view
1523         VIEW_INFO(VIEW_DATA)
1524 };
1525
1526 struct view *
1527 get_view(int i)
1528 {
1529         return 0 <= i && i < ARRAY_SIZE(views) ? views[i] : NULL;
1530 }
1531
1532 /* vim: set ts=8 sw=8 noexpandtab: */