| 1 | /** |
| 2 | * TIG(1) |
| 3 | * ====== |
| 4 | * |
| 5 | * NAME |
| 6 | * ---- |
| 7 | * tig - text-mode interface for git |
| 8 | * |
| 9 | * SYNOPSIS |
| 10 | * -------- |
| 11 | * [verse] |
| 12 | * tig |
| 13 | * tig log [git log options] |
| 14 | * tig diff [git diff options] |
| 15 | * tig < [git log or git diff output] |
| 16 | * |
| 17 | * DESCRIPTION |
| 18 | * ----------- |
| 19 | * Browse changes in a git repository. |
| 20 | * |
| 21 | * OPTIONS |
| 22 | * ------- |
| 23 | * |
| 24 | * None. |
| 25 | * |
| 26 | **/ |
| 27 | |
| 28 | #define DEBUG |
| 29 | |
| 30 | #ifndef DEBUG |
| 31 | #define NDEBUG |
| 32 | #endif |
| 33 | |
| 34 | #include <assert.h> |
| 35 | #include <ctype.h> |
| 36 | #include <signal.h> |
| 37 | #include <stdarg.h> |
| 38 | #include <stdio.h> |
| 39 | #include <stdlib.h> |
| 40 | #include <string.h> |
| 41 | |
| 42 | #include <curses.h> |
| 43 | #include <form.h> |
| 44 | |
| 45 | static void die(const char *err, ...); |
| 46 | static void report(const char *msg, ...); |
| 47 | |
| 48 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
| 49 | |
| 50 | #define KEY_TAB 9 |
| 51 | #define KEY_ESC 27 |
| 52 | #define KEY_DEL 127 |
| 53 | |
| 54 | #define REQ_OFFSET (MAX_COMMAND + 1) |
| 55 | |
| 56 | /* Requests for switching between the different views. */ |
| 57 | #define REQ_DIFF (REQ_OFFSET + 0) |
| 58 | #define REQ_LOG (REQ_OFFSET + 1) |
| 59 | #define REQ_MAIN (REQ_OFFSET + 2) |
| 60 | #define REQ_VIEWS (REQ_OFFSET + 3) |
| 61 | |
| 62 | #define REQ_QUIT (REQ_OFFSET + 11) |
| 63 | #define REQ_VERSION (REQ_OFFSET + 12) |
| 64 | #define REQ_STOP (REQ_OFFSET + 13) |
| 65 | #define REQ_UPDATE (REQ_OFFSET + 14) |
| 66 | #define REQ_REDRAW (REQ_OFFSET + 15) |
| 67 | #define REQ_FIRST_LINE (REQ_OFFSET + 16) |
| 68 | #define REQ_LAST_LINE (REQ_OFFSET + 17) |
| 69 | |
| 70 | #define COLOR_TRANSP (-1) |
| 71 | |
| 72 | |
| 73 | enum line_type { |
| 74 | LINE_AUTHOR, |
| 75 | LINE_COMMIT, |
| 76 | LINE_DATE, |
| 77 | LINE_DIFF, |
| 78 | LINE_DIFF_ADD, |
| 79 | LINE_DIFF_DEL, |
| 80 | LINE_DIFF_CHUNK, |
| 81 | LINE_DIFF_TREE, |
| 82 | LINE_INDEX, |
| 83 | LINE_PARENT, |
| 84 | LINE_TREE, |
| 85 | |
| 86 | LINE_UNKNOWN, |
| 87 | LINE_CURSOR, |
| 88 | LINE_STATUS, |
| 89 | LINE_TITLE, |
| 90 | }; |
| 91 | |
| 92 | struct line_info { |
| 93 | enum line_type type; |
| 94 | char *line; |
| 95 | int linelen; |
| 96 | |
| 97 | int fg; |
| 98 | int bg; |
| 99 | int attr; |
| 100 | }; |
| 101 | |
| 102 | #define LINE(type, line, fg, bg, attr) \ |
| 103 | { LINE_##type, (line), sizeof(line) - 1, (fg), (bg), (attr) } |
| 104 | |
| 105 | static struct line_info line_info[] = { |
| 106 | LINE(AUTHOR, "Author: ", COLOR_CYAN, COLOR_TRANSP, 0), |
| 107 | //LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_TRANSP, 0), |
| 108 | LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_TRANSP, 0), |
| 109 | LINE(DATE, "Date: ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 110 | LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_TRANSP, 0), |
| 111 | LINE(DIFF_CHUNK, "@", COLOR_MAGENTA, COLOR_TRANSP, 0), |
| 112 | LINE(DIFF_DEL, "-", COLOR_RED, COLOR_TRANSP, 0), |
| 113 | LINE(DIFF, "diff --git ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 114 | LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_TRANSP, 0), |
| 115 | LINE(INDEX, "index ", COLOR_BLUE, COLOR_TRANSP, 0), |
| 116 | LINE(PARENT, "parent ", COLOR_GREEN, COLOR_TRANSP, 0), |
| 117 | LINE(TREE, "tree ", COLOR_GREEN, COLOR_TRANSP, 0), |
| 118 | |
| 119 | LINE(UNKNOWN, "", COLOR_TRANSP, COLOR_TRANSP, A_NORMAL), |
| 120 | |
| 121 | LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), |
| 122 | LINE(STATUS, "", COLOR_GREEN, COLOR_TRANSP, 0), |
| 123 | LINE(TITLE, "", COLOR_YELLOW, COLOR_BLUE, A_BOLD), |
| 124 | }; |
| 125 | |
| 126 | static struct line_info * |
| 127 | get_line_info(char *line) |
| 128 | { |
| 129 | int linelen = strlen(line); |
| 130 | int i; |
| 131 | |
| 132 | for (i = 0; i < ARRAY_SIZE(line_info); i++) { |
| 133 | if (linelen < line_info[i].linelen |
| 134 | || strncmp(line_info[i].line, line, line_info[i].linelen)) |
| 135 | continue; |
| 136 | |
| 137 | return &line_info[i]; |
| 138 | } |
| 139 | |
| 140 | return NULL; |
| 141 | } |
| 142 | |
| 143 | static enum line_type |
| 144 | get_line_type(char *line) |
| 145 | { |
| 146 | struct line_info *info = get_line_info(line); |
| 147 | |
| 148 | return info ? info->type : LINE_UNKNOWN; |
| 149 | } |
| 150 | |
| 151 | static int |
| 152 | get_line_attr(enum line_type type) |
| 153 | { |
| 154 | int i; |
| 155 | |
| 156 | for (i = 0; i < ARRAY_SIZE(line_info); i++) |
| 157 | if (line_info[i].type == type) |
| 158 | return COLOR_PAIR(line_info[i].type) | line_info[i].attr; |
| 159 | |
| 160 | return A_NORMAL; |
| 161 | } |
| 162 | |
| 163 | static void |
| 164 | init_colors(void) |
| 165 | { |
| 166 | int transparent_bg = COLOR_BLACK; |
| 167 | int transparent_fg = COLOR_WHITE; |
| 168 | int i; |
| 169 | |
| 170 | start_color(); |
| 171 | |
| 172 | if (use_default_colors() != ERR) { |
| 173 | transparent_bg = -1; |
| 174 | transparent_fg = -1; |
| 175 | } |
| 176 | |
| 177 | for (i = 0; i < ARRAY_SIZE(line_info); i++) { |
| 178 | struct line_info *info = &line_info[i]; |
| 179 | int bg = info->bg == COLOR_TRANSP ? transparent_bg : info->bg; |
| 180 | int fg = info->fg == COLOR_TRANSP ? transparent_fg : info->fg; |
| 181 | |
| 182 | init_pair(info->type, fg, bg); |
| 183 | } |
| 184 | } |
| 185 | |
| 186 | |
| 187 | |
| 188 | |
| 189 | /** |
| 190 | * KEYS |
| 191 | * ---- |
| 192 | * |
| 193 | * d:: |
| 194 | * diff |
| 195 | * l:: |
| 196 | * log |
| 197 | * q:: |
| 198 | * quit |
| 199 | * r:: |
| 200 | * redraw screen |
| 201 | * s:: |
| 202 | * stop all background loading |
| 203 | * j:: |
| 204 | * down |
| 205 | * k:: |
| 206 | * up |
| 207 | * h, ?:: |
| 208 | * help |
| 209 | * v:: |
| 210 | * version |
| 211 | * |
| 212 | **/ |
| 213 | |
| 214 | #define HELP "(d)iff, (l)og, (m)ain, (q)uit, (v)ersion, (h)elp" |
| 215 | |
| 216 | struct keymap { |
| 217 | int alias; |
| 218 | int request; |
| 219 | }; |
| 220 | |
| 221 | struct keymap keymap[] = { |
| 222 | /* Cursor navigation */ |
| 223 | { KEY_UP, REQ_PREV_LINE }, |
| 224 | { 'k', REQ_PREV_LINE }, |
| 225 | { KEY_DOWN, REQ_NEXT_LINE }, |
| 226 | { 'j', REQ_NEXT_LINE }, |
| 227 | { KEY_HOME, REQ_FIRST_LINE }, |
| 228 | { KEY_END, REQ_LAST_LINE }, |
| 229 | { KEY_NPAGE, REQ_NEXT_PAGE }, |
| 230 | { KEY_PPAGE, REQ_PREV_PAGE }, |
| 231 | |
| 232 | /* Scrolling */ |
| 233 | { KEY_IC, REQ_SCR_BLINE }, /* scroll field backward a line */ |
| 234 | { KEY_DC, REQ_SCR_FLINE }, /* scroll field forward a line */ |
| 235 | { 's', REQ_SCR_FPAGE }, /* scroll field forward a page */ |
| 236 | { 'w', REQ_SCR_BPAGE }, /* scroll field backward a page */ |
| 237 | |
| 238 | { 'd', REQ_DIFF }, |
| 239 | { 'l', REQ_LOG }, |
| 240 | { 'm', REQ_MAIN }, |
| 241 | |
| 242 | /* No input from wgetch() with nodelay() enabled. */ |
| 243 | { ERR, REQ_UPDATE }, |
| 244 | |
| 245 | { KEY_ESC, REQ_QUIT }, |
| 246 | { 'q', REQ_QUIT }, |
| 247 | { 's', REQ_STOP }, |
| 248 | { 'v', REQ_VERSION }, |
| 249 | { 'r', REQ_REDRAW }, |
| 250 | }; |
| 251 | |
| 252 | static int |
| 253 | get_request(int request) |
| 254 | { |
| 255 | int i; |
| 256 | |
| 257 | for (i = 0; i < ARRAY_SIZE(keymap); i++) |
| 258 | if (keymap[i].alias == request) |
| 259 | return keymap[i].request; |
| 260 | |
| 261 | return request; |
| 262 | } |
| 263 | |
| 264 | |
| 265 | /* |
| 266 | * Viewer |
| 267 | */ |
| 268 | |
| 269 | struct view { |
| 270 | char *name; |
| 271 | char *cmd; |
| 272 | char *id; |
| 273 | |
| 274 | |
| 275 | /* Rendering */ |
| 276 | int (*read)(struct view *, char *); |
| 277 | int (*draw)(struct view *, unsigned int); |
| 278 | size_t objsize; /* Size of objects in the line index */ |
| 279 | |
| 280 | WINDOW *win; |
| 281 | int height, width; |
| 282 | |
| 283 | /* Navigation */ |
| 284 | unsigned long offset; /* Offset of the window top */ |
| 285 | unsigned long lineno; /* Current line number */ |
| 286 | |
| 287 | /* Buffering */ |
| 288 | unsigned long lines; /* Total number of lines */ |
| 289 | void **line; /* Line index */ |
| 290 | |
| 291 | /* Loading */ |
| 292 | FILE *pipe; |
| 293 | }; |
| 294 | |
| 295 | struct commit { |
| 296 | char id[41]; |
| 297 | char title[75]; |
| 298 | }; |
| 299 | |
| 300 | static int pager_draw(struct view *view, unsigned int lineno); |
| 301 | static int pager_read(struct view *view, char *line); |
| 302 | |
| 303 | static int main_draw(struct view *view, unsigned int lineno); |
| 304 | static int main_read(struct view *view, char *line); |
| 305 | |
| 306 | #define DIFF_CMD \ |
| 307 | "git log --stat -n1 %s ; echo; " \ |
| 308 | "git diff --find-copies-harder -B -C %s^ %s" |
| 309 | |
| 310 | #define LOG_CMD \ |
| 311 | "git log --stat -n100 %s" |
| 312 | |
| 313 | #define MAIN_CMD \ |
| 314 | "git log --stat --pretty=raw %s" |
| 315 | |
| 316 | /* The status window at the bottom. Used for polling keystrokes. */ |
| 317 | static WINDOW *status_win; |
| 318 | |
| 319 | static WINDOW *title_win; |
| 320 | |
| 321 | #define SIZEOF_ID 1024 |
| 322 | #define SIZEOF_VIEWS (REQ_VIEWS - REQ_OFFSET) |
| 323 | |
| 324 | char head_id[SIZEOF_ID] = "HEAD"; |
| 325 | char commit_id[SIZEOF_ID] = "HEAD"; |
| 326 | |
| 327 | static unsigned int current_view; |
| 328 | static unsigned int nloading; |
| 329 | |
| 330 | static struct view views[]; |
| 331 | static struct view *display[]; |
| 332 | |
| 333 | static struct view views[] = { |
| 334 | { "diff", DIFF_CMD, commit_id, pager_read, pager_draw, sizeof(char) }, |
| 335 | { "log", LOG_CMD, head_id, pager_read, pager_draw, sizeof(char) }, |
| 336 | { "main", MAIN_CMD, head_id, main_read, main_draw, sizeof(struct commit) }, |
| 337 | }; |
| 338 | |
| 339 | static struct view *display[ARRAY_SIZE(views)]; |
| 340 | |
| 341 | |
| 342 | #define foreach_view(view, i) \ |
| 343 | for (i = 0; i < sizeof(display) && (view = display[i]); i++) |
| 344 | |
| 345 | static void |
| 346 | redraw_view(struct view *view) |
| 347 | { |
| 348 | int lineno; |
| 349 | |
| 350 | wclear(view->win); |
| 351 | wmove(view->win, 0, 0); |
| 352 | |
| 353 | for (lineno = 0; lineno < view->height; lineno++) { |
| 354 | if (!view->draw(view, lineno)) |
| 355 | break; |
| 356 | } |
| 357 | |
| 358 | redrawwin(view->win); |
| 359 | wrefresh(view->win); |
| 360 | } |
| 361 | |
| 362 | /* FIXME: Fix percentage. */ |
| 363 | static void |
| 364 | report_position(struct view *view, int all) |
| 365 | { |
| 366 | report(all ? "line %d of %d (%d%%) viewing from %d" |
| 367 | : "line %d of %d", |
| 368 | view->lineno + 1, |
| 369 | view->lines, |
| 370 | view->lines ? view->offset * 100 / view->lines : 0, |
| 371 | view->offset); |
| 372 | } |
| 373 | |
| 374 | |
| 375 | static void |
| 376 | move_view(struct view *view, int lines) |
| 377 | { |
| 378 | /* The rendering expects the new offset. */ |
| 379 | view->offset += lines; |
| 380 | |
| 381 | assert(0 <= view->offset && view->offset < view->lines); |
| 382 | assert(lines); |
| 383 | |
| 384 | { |
| 385 | int line = lines > 0 ? view->height - lines : 0; |
| 386 | int end = line + (lines > 0 ? lines : -lines); |
| 387 | |
| 388 | wscrl(view->win, lines); |
| 389 | |
| 390 | for (; line < end; line++) { |
| 391 | if (!view->draw(view, line)) |
| 392 | break; |
| 393 | } |
| 394 | } |
| 395 | |
| 396 | /* Move current line into the view. */ |
| 397 | if (view->lineno < view->offset) { |
| 398 | view->lineno = view->offset; |
| 399 | view->draw(view, 0); |
| 400 | |
| 401 | } else if (view->lineno >= view->offset + view->height) { |
| 402 | view->lineno = view->offset + view->height - 1; |
| 403 | view->draw(view, view->lineno - view->offset); |
| 404 | } |
| 405 | |
| 406 | assert(view->offset <= view->lineno && view->lineno <= view->lines); |
| 407 | |
| 408 | redrawwin(view->win); |
| 409 | wrefresh(view->win); |
| 410 | |
| 411 | report_position(view, lines); |
| 412 | } |
| 413 | |
| 414 | static void |
| 415 | scroll_view(struct view *view, int request) |
| 416 | { |
| 417 | int lines = 1; |
| 418 | |
| 419 | switch (request) { |
| 420 | case REQ_SCR_FPAGE: |
| 421 | lines = view->height; |
| 422 | case REQ_SCR_FLINE: |
| 423 | if (view->offset + lines > view->lines) |
| 424 | lines = view->lines - view->offset; |
| 425 | |
| 426 | if (lines == 0 || view->offset + view->height >= view->lines) { |
| 427 | report("already at last line"); |
| 428 | return; |
| 429 | } |
| 430 | break; |
| 431 | |
| 432 | case REQ_SCR_BPAGE: |
| 433 | lines = view->height; |
| 434 | case REQ_SCR_BLINE: |
| 435 | if (lines > view->offset) |
| 436 | lines = view->offset; |
| 437 | |
| 438 | if (lines == 0) { |
| 439 | report("already at first line"); |
| 440 | return; |
| 441 | } |
| 442 | |
| 443 | lines = -lines; |
| 444 | break; |
| 445 | } |
| 446 | |
| 447 | move_view(view, lines); |
| 448 | } |
| 449 | |
| 450 | |
| 451 | static void |
| 452 | navigate_view(struct view *view, int request) |
| 453 | { |
| 454 | int steps; |
| 455 | |
| 456 | switch (request) { |
| 457 | case REQ_FIRST_LINE: |
| 458 | steps = -view->lineno; |
| 459 | break; |
| 460 | |
| 461 | case REQ_LAST_LINE: |
| 462 | steps = view->lines - view->lineno - 1; |
| 463 | break; |
| 464 | |
| 465 | case REQ_PREV_PAGE: |
| 466 | steps = view->height > view->lineno |
| 467 | ? -view->lineno : -view->height; |
| 468 | break; |
| 469 | |
| 470 | case REQ_NEXT_PAGE: |
| 471 | steps = view->lineno + view->height >= view->lines |
| 472 | ? view->lines - view->lineno - 1 : view->height; |
| 473 | break; |
| 474 | |
| 475 | case REQ_PREV_LINE: |
| 476 | steps = -1; |
| 477 | break; |
| 478 | |
| 479 | case REQ_NEXT_LINE: |
| 480 | steps = 1; |
| 481 | break; |
| 482 | } |
| 483 | |
| 484 | if (steps < 0 && view->lineno == 0) { |
| 485 | report("already at first line"); |
| 486 | return; |
| 487 | |
| 488 | } else if (steps > 0 && view->lineno + 1 >= view->lines) { |
| 489 | report("already at last line"); |
| 490 | return; |
| 491 | } |
| 492 | |
| 493 | view->lineno += steps; |
| 494 | view->draw(view, view->lineno - steps - view->offset); |
| 495 | |
| 496 | if (view->lineno < view->offset || |
| 497 | view->lineno >= view->offset + view->height) { |
| 498 | if (steps < 0 && -steps > view->offset) { |
| 499 | steps = -view->offset; |
| 500 | } else if (steps > 0 && steps > view->height) { |
| 501 | steps -= view->height - 1; |
| 502 | } |
| 503 | |
| 504 | move_view(view, steps); |
| 505 | return; |
| 506 | } |
| 507 | |
| 508 | view->draw(view, view->lineno - view->offset); |
| 509 | |
| 510 | redrawwin(view->win); |
| 511 | wrefresh(view->win); |
| 512 | |
| 513 | report_position(view, view->height); |
| 514 | } |
| 515 | |
| 516 | static void |
| 517 | resize_view(struct view *view) |
| 518 | { |
| 519 | int lines, cols; |
| 520 | |
| 521 | getmaxyx(stdscr, lines, cols); |
| 522 | |
| 523 | if (view->win) { |
| 524 | mvwin(view->win, 0, 0); |
| 525 | wresize(view->win, lines - 2, cols); |
| 526 | |
| 527 | } else { |
| 528 | view->win = newwin(lines - 2, 0, 0, 0); |
| 529 | if (!view->win) { |
| 530 | report("failed to create %s view", view->name); |
| 531 | return; |
| 532 | } |
| 533 | scrollok(view->win, TRUE); |
| 534 | } |
| 535 | |
| 536 | getmaxyx(view->win, view->height, view->width); |
| 537 | } |
| 538 | |
| 539 | |
| 540 | static bool |
| 541 | begin_update(struct view *view) |
| 542 | { |
| 543 | char buf[1024]; |
| 544 | |
| 545 | if (view->cmd) { |
| 546 | char *id = view->id; |
| 547 | |
| 548 | if (snprintf(buf, sizeof(buf), view->cmd, id, id, id) < sizeof(buf)) |
| 549 | view->pipe = popen(buf, "r"); |
| 550 | |
| 551 | if (!view->pipe) |
| 552 | return FALSE; |
| 553 | |
| 554 | if (nloading++ == 0) |
| 555 | nodelay(status_win, TRUE); |
| 556 | } |
| 557 | |
| 558 | display[current_view] = view; |
| 559 | |
| 560 | view->offset = 0; |
| 561 | view->lines = 0; |
| 562 | view->lineno = 0; |
| 563 | |
| 564 | return TRUE; |
| 565 | } |
| 566 | |
| 567 | static void |
| 568 | end_update(struct view *view) |
| 569 | { |
| 570 | wattrset(view->win, A_NORMAL); |
| 571 | pclose(view->pipe); |
| 572 | view->pipe = NULL; |
| 573 | |
| 574 | if (nloading-- == 1) |
| 575 | nodelay(status_win, FALSE); |
| 576 | } |
| 577 | |
| 578 | static int |
| 579 | update_view(struct view *view) |
| 580 | { |
| 581 | char buffer[BUFSIZ]; |
| 582 | char *line; |
| 583 | void **tmp; |
| 584 | int redraw; |
| 585 | int lines = view->height; |
| 586 | |
| 587 | if (!view->pipe) |
| 588 | return TRUE; |
| 589 | |
| 590 | /* Only redraw after the first reading session. */ |
| 591 | /* FIXME: ... and possibly more. */ |
| 592 | redraw = view->height > view->lines; |
| 593 | |
| 594 | tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines)); |
| 595 | if (!tmp) |
| 596 | goto alloc_error; |
| 597 | |
| 598 | view->line = tmp; |
| 599 | |
| 600 | while ((line = fgets(buffer, sizeof(buffer), view->pipe))) { |
| 601 | int linelen; |
| 602 | |
| 603 | linelen = strlen(line); |
| 604 | if (linelen) |
| 605 | line[linelen - 1] = 0; |
| 606 | |
| 607 | if (!view->read(view, line)) |
| 608 | goto alloc_error; |
| 609 | |
| 610 | if (lines-- == 1) |
| 611 | break; |
| 612 | } |
| 613 | |
| 614 | if (redraw) |
| 615 | redraw_view(view); |
| 616 | |
| 617 | if (ferror(view->pipe)) { |
| 618 | report("failed to read %s", view->cmd); |
| 619 | goto end; |
| 620 | |
| 621 | } else if (feof(view->pipe)) { |
| 622 | report_position(view, 0); |
| 623 | goto end; |
| 624 | } |
| 625 | |
| 626 | return TRUE; |
| 627 | |
| 628 | alloc_error: |
| 629 | report("allocation failure"); |
| 630 | |
| 631 | end: |
| 632 | end_update(view); |
| 633 | return FALSE; |
| 634 | } |
| 635 | |
| 636 | |
| 637 | static struct view * |
| 638 | switch_view(struct view *prev, int request) |
| 639 | { |
| 640 | struct view *view = &views[request - REQ_OFFSET]; |
| 641 | struct view *displayed; |
| 642 | int i; |
| 643 | |
| 644 | if (view == prev) { |
| 645 | foreach_view (displayed, i) ; |
| 646 | |
| 647 | if (i == 1) |
| 648 | report("already in %s view", view->name); |
| 649 | else |
| 650 | report("FIXME: Maximize"); |
| 651 | |
| 652 | return view; |
| 653 | |
| 654 | } else { |
| 655 | foreach_view (displayed, i) { |
| 656 | if (view == displayed) { |
| 657 | current_view = i; |
| 658 | report("new current view"); |
| 659 | return view; |
| 660 | } |
| 661 | } |
| 662 | } |
| 663 | |
| 664 | if (!view->win) |
| 665 | resize_view(view); |
| 666 | |
| 667 | /* Reload */ |
| 668 | |
| 669 | if (view->line) { |
| 670 | for (i = 0; i < view->lines; i++) |
| 671 | if (view->line[i]) |
| 672 | free(view->line[i]); |
| 673 | |
| 674 | free(view->line); |
| 675 | view->line = NULL; |
| 676 | } |
| 677 | |
| 678 | if (prev && prev->pipe) |
| 679 | end_update(prev); |
| 680 | |
| 681 | if (begin_update(view)) { |
| 682 | if (!view->cmd) |
| 683 | report("%s", HELP); |
| 684 | else |
| 685 | report("loading..."); |
| 686 | } |
| 687 | |
| 688 | return view; |
| 689 | } |
| 690 | |
| 691 | |
| 692 | /* Process a keystroke */ |
| 693 | static int |
| 694 | view_driver(struct view *view, int key) |
| 695 | { |
| 696 | int request = get_request(key); |
| 697 | int i; |
| 698 | |
| 699 | switch (request) { |
| 700 | case REQ_NEXT_LINE: |
| 701 | case REQ_PREV_LINE: |
| 702 | case REQ_FIRST_LINE: |
| 703 | case REQ_LAST_LINE: |
| 704 | case REQ_NEXT_PAGE: |
| 705 | case REQ_PREV_PAGE: |
| 706 | if (view) |
| 707 | navigate_view(view, request); |
| 708 | break; |
| 709 | |
| 710 | case REQ_SCR_FLINE: |
| 711 | case REQ_SCR_BLINE: |
| 712 | case REQ_SCR_FPAGE: |
| 713 | case REQ_SCR_BPAGE: |
| 714 | if (view) |
| 715 | scroll_view(view, request); |
| 716 | break; |
| 717 | |
| 718 | case REQ_MAIN: |
| 719 | case REQ_LOG: |
| 720 | case REQ_DIFF: |
| 721 | view = switch_view(view, request); |
| 722 | break; |
| 723 | |
| 724 | case REQ_REDRAW: |
| 725 | redraw_view(view); |
| 726 | break; |
| 727 | |
| 728 | case REQ_STOP: |
| 729 | foreach_view (view, i) { |
| 730 | if (view->pipe) { |
| 731 | end_update(view); |
| 732 | scroll_view(view, 0); |
| 733 | } |
| 734 | } |
| 735 | break; |
| 736 | |
| 737 | case REQ_VERSION: |
| 738 | report("version %s", VERSION); |
| 739 | return TRUE; |
| 740 | |
| 741 | case REQ_UPDATE: |
| 742 | doupdate(); |
| 743 | return TRUE; |
| 744 | |
| 745 | case REQ_QUIT: |
| 746 | return FALSE; |
| 747 | |
| 748 | default: |
| 749 | report(HELP); |
| 750 | return TRUE; |
| 751 | } |
| 752 | |
| 753 | return TRUE; |
| 754 | } |
| 755 | |
| 756 | |
| 757 | /* |
| 758 | * Rendering |
| 759 | */ |
| 760 | |
| 761 | static int |
| 762 | pager_draw(struct view *view, unsigned int lineno) |
| 763 | { |
| 764 | enum line_type type; |
| 765 | char *line; |
| 766 | int attr; |
| 767 | |
| 768 | if (view->offset + lineno >= view->lines) |
| 769 | return FALSE; |
| 770 | |
| 771 | line = view->line[view->offset + lineno]; |
| 772 | type = get_line_type(line); |
| 773 | |
| 774 | if (view->offset + lineno == view->lineno) { |
| 775 | if (type == LINE_COMMIT) |
| 776 | strncpy(commit_id, line + 7, SIZEOF_ID); |
| 777 | type = LINE_CURSOR; |
| 778 | } |
| 779 | |
| 780 | attr = get_line_attr(type); |
| 781 | wattrset(view->win, attr); |
| 782 | //mvwprintw(view->win, lineno, 0, "%4d: %s", view->offset + lineno, line); |
| 783 | mvwaddstr(view->win, lineno, 0, line); |
| 784 | |
| 785 | return TRUE; |
| 786 | } |
| 787 | |
| 788 | static int |
| 789 | pager_read(struct view *view, char *line) |
| 790 | { |
| 791 | view->line[view->lines] = strdup(line); |
| 792 | if (!view->line[view->lines]) |
| 793 | return FALSE; |
| 794 | |
| 795 | view->lines++; |
| 796 | return TRUE; |
| 797 | } |
| 798 | |
| 799 | static int |
| 800 | main_draw(struct view *view, unsigned int lineno) |
| 801 | { |
| 802 | struct commit *commit; |
| 803 | enum line_type type; |
| 804 | |
| 805 | if (view->offset + lineno >= view->lines) |
| 806 | return FALSE; |
| 807 | |
| 808 | commit = view->line[view->offset + lineno]; |
| 809 | if (!commit) return FALSE; |
| 810 | |
| 811 | if (view->offset + lineno == view->lineno) { |
| 812 | strncpy(commit_id, commit->id, SIZEOF_ID); |
| 813 | type = LINE_CURSOR; |
| 814 | } else { |
| 815 | type = LINE_COMMIT; |
| 816 | } |
| 817 | |
| 818 | mvwaddch(view->win, lineno, 0, ACS_LTEE); |
| 819 | wattrset(view->win, get_line_attr(type)); |
| 820 | mvwaddstr(view->win, lineno, 2, commit->title); |
| 821 | wattrset(view->win, A_NORMAL); |
| 822 | |
| 823 | return TRUE; |
| 824 | } |
| 825 | |
| 826 | static int |
| 827 | main_read(struct view *view, char *line) |
| 828 | { |
| 829 | enum line_type type = get_line_type(line); |
| 830 | struct commit *commit; |
| 831 | |
| 832 | switch (type) { |
| 833 | case LINE_COMMIT: |
| 834 | commit = calloc(1, sizeof(struct commit)); |
| 835 | if (!commit) |
| 836 | return FALSE; |
| 837 | |
| 838 | view->line[view->lines++] = commit; |
| 839 | strncpy(commit->id, line + 7, 41); |
| 840 | break; |
| 841 | |
| 842 | default: |
| 843 | commit = view->line[view->lines - 1]; |
| 844 | if (!commit->title[0] && |
| 845 | !strncmp(line, " ", 4) && |
| 846 | !isspace(line[5])) |
| 847 | strncpy(commit->title, line + 4, sizeof(commit->title)); |
| 848 | } |
| 849 | |
| 850 | return TRUE; |
| 851 | } |
| 852 | |
| 853 | |
| 854 | /* |
| 855 | * Main |
| 856 | */ |
| 857 | |
| 858 | static void |
| 859 | quit(int sig) |
| 860 | { |
| 861 | if (status_win) |
| 862 | delwin(status_win); |
| 863 | if (title_win) |
| 864 | delwin(title_win); |
| 865 | endwin(); |
| 866 | |
| 867 | /* FIXME: Shutdown gracefully. */ |
| 868 | |
| 869 | exit(0); |
| 870 | } |
| 871 | |
| 872 | static void die(const char *err, ...) |
| 873 | { |
| 874 | va_list args; |
| 875 | |
| 876 | endwin(); |
| 877 | |
| 878 | va_start(args, err); |
| 879 | fputs("tig: ", stderr); |
| 880 | vfprintf(stderr, err, args); |
| 881 | fputs("\n", stderr); |
| 882 | va_end(args); |
| 883 | |
| 884 | exit(1); |
| 885 | } |
| 886 | |
| 887 | static void |
| 888 | report(const char *msg, ...) |
| 889 | { |
| 890 | va_list args; |
| 891 | |
| 892 | va_start(args, msg); |
| 893 | |
| 894 | werase(status_win); |
| 895 | wmove(status_win, 0, 0); |
| 896 | |
| 897 | #if 0 |
| 898 | if (display[current_view]) |
| 899 | wprintw(status_win, "%s %4s: ", commit_id, display[current_view]->name); |
| 900 | #endif |
| 901 | vwprintw(status_win, msg, args); |
| 902 | wrefresh(status_win); |
| 903 | |
| 904 | va_end(args); |
| 905 | |
| 906 | werase(title_win); |
| 907 | wmove(title_win, 0, 0); |
| 908 | wprintw(title_win, "commit %s", commit_id); |
| 909 | wrefresh(title_win); |
| 910 | |
| 911 | } |
| 912 | |
| 913 | int |
| 914 | main(int argc, char *argv[]) |
| 915 | { |
| 916 | int request = REQ_MAIN; |
| 917 | int x, y; |
| 918 | |
| 919 | signal(SIGINT, quit); |
| 920 | |
| 921 | initscr(); /* initialize the curses library */ |
| 922 | nonl(); /* tell curses not to do NL->CR/NL on output */ |
| 923 | cbreak(); /* take input chars one at a time, no wait for \n */ |
| 924 | noecho(); /* don't echo input */ |
| 925 | leaveok(stdscr, TRUE); |
| 926 | /* curs_set(0); */ |
| 927 | |
| 928 | if (has_colors()) |
| 929 | init_colors(); |
| 930 | |
| 931 | getmaxyx(stdscr, y, x); |
| 932 | status_win = newwin(1, 0, y - 1, 0); |
| 933 | if (!status_win) |
| 934 | die("Failed to create status window"); |
| 935 | |
| 936 | title_win = newwin(1, 0, y - 2, 0); |
| 937 | if (!title_win) |
| 938 | die("Failed to create title window"); |
| 939 | |
| 940 | /* Enable keyboard mapping */ |
| 941 | keypad(status_win, TRUE); |
| 942 | wbkgdset(status_win, get_line_attr(LINE_STATUS)); |
| 943 | wbkgdset(title_win, get_line_attr(LINE_TITLE)); |
| 944 | |
| 945 | while (view_driver(display[current_view], request)) { |
| 946 | struct view *view; |
| 947 | int i; |
| 948 | |
| 949 | foreach_view (view, i) { |
| 950 | if (view->pipe) { |
| 951 | update_view(view); |
| 952 | } |
| 953 | } |
| 954 | |
| 955 | /* Refresh, accept single keystroke of input */ |
| 956 | request = wgetch(status_win); |
| 957 | if (request == KEY_RESIZE) { |
| 958 | int lines, cols; |
| 959 | |
| 960 | getmaxyx(stdscr, lines, cols); |
| 961 | |
| 962 | mvwin(status_win, lines - 1, 0); |
| 963 | wresize(status_win, 1, cols - 1); |
| 964 | |
| 965 | mvwin(title_win, lines - 2, 0); |
| 966 | wresize(title_win, 1, cols - 1); |
| 967 | } |
| 968 | } |
| 969 | |
| 970 | quit(0); |
| 971 | |
| 972 | return 0; |
| 973 | } |
| 974 | |
| 975 | /** |
| 976 | * COPYRIGHT |
| 977 | * --------- |
| 978 | * Copyright (c) Jonas Fonseca, 2006 |
| 979 | * |
| 980 | * This program is free software; you can redistribute it and/or modify |
| 981 | * it under the terms of the GNU General Public License as published by |
| 982 | * the Free Software Foundation; either version 2 of the License, or |
| 983 | * (at your option) any later version. |
| 984 | * |
| 985 | * SEE ALSO |
| 986 | * -------- |
| 987 | * link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)], |
| 988 | * link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)] |
| 989 | **/ |