| 1 | /** |
| 2 | * TIG(1) |
| 3 | * ====== |
| 4 | * |
| 5 | * NAME |
| 6 | * ---- |
| 7 | * tig - text-mode interface for git |
| 8 | * |
| 9 | * SYNOPSIS |
| 10 | * -------- |
| 11 | * [verse] |
| 12 | * tig [options] |
| 13 | * tig [options] log [git log options] |
| 14 | * tig [options] diff [git diff options] |
| 15 | * tig [options] < [git log or git diff output] |
| 16 | * |
| 17 | * DESCRIPTION |
| 18 | * ----------- |
| 19 | * Browse changes in a git repository. |
| 20 | **/ |
| 21 | |
| 22 | #define DEBUG |
| 23 | #ifndef DEBUG |
| 24 | #define NDEBUG |
| 25 | #endif |
| 26 | |
| 27 | #ifndef VERSION |
| 28 | #define VERSION "tig-0.1" |
| 29 | #endif |
| 30 | |
| 31 | #include <assert.h> |
| 32 | #include <ctype.h> |
| 33 | #include <signal.h> |
| 34 | #include <stdarg.h> |
| 35 | #include <stdio.h> |
| 36 | #include <stdlib.h> |
| 37 | #include <string.h> |
| 38 | #include <time.h> |
| 39 | |
| 40 | #include <curses.h> |
| 41 | #include <form.h> |
| 42 | |
| 43 | static void die(const char *err, ...); |
| 44 | static void report(const char *msg, ...); |
| 45 | |
| 46 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
| 47 | |
| 48 | #define KEY_TAB 9 |
| 49 | #define KEY_ESC 27 |
| 50 | #define KEY_DEL 127 |
| 51 | |
| 52 | #define REQ_OFFSET (MAX_COMMAND + 1) |
| 53 | |
| 54 | /* Requests for switching between the different views. */ |
| 55 | #define REQ_DIFF (REQ_OFFSET + 0) |
| 56 | #define REQ_LOG (REQ_OFFSET + 1) |
| 57 | #define REQ_MAIN (REQ_OFFSET + 2) |
| 58 | #define REQ_VIEWS (REQ_OFFSET + 3) |
| 59 | |
| 60 | #define REQ_QUIT (REQ_OFFSET + 11) |
| 61 | #define REQ_VERSION (REQ_OFFSET + 12) |
| 62 | #define REQ_STOP (REQ_OFFSET + 13) |
| 63 | #define REQ_UPDATE (REQ_OFFSET + 14) |
| 64 | #define REQ_REDRAW (REQ_OFFSET + 15) |
| 65 | #define REQ_FIRST_LINE (REQ_OFFSET + 16) |
| 66 | #define REQ_LAST_LINE (REQ_OFFSET + 17) |
| 67 | #define REQ_LINE_NUMBER (REQ_OFFSET + 18) |
| 68 | |
| 69 | #define SIZEOF_VIEWS (REQ_VIEWS - REQ_OFFSET) |
| 70 | #define SIZEOF_ID 1024 |
| 71 | |
| 72 | #define COLOR_TRANSP (-1) |
| 73 | |
| 74 | |
| 75 | /** |
| 76 | * OPTIONS |
| 77 | * ------- |
| 78 | **/ |
| 79 | |
| 80 | static int opt_line_number; |
| 81 | static int opt_request = REQ_MAIN; |
| 82 | |
| 83 | char head_id[SIZEOF_ID] = "HEAD"; |
| 84 | char commit_id[SIZEOF_ID] = "HEAD"; |
| 85 | |
| 86 | |
| 87 | /* Returns the index of log or diff command or -1 to exit. */ |
| 88 | static int |
| 89 | parse_options(int argc, char *argv[]) |
| 90 | { |
| 91 | int i; |
| 92 | |
| 93 | for (i = 1; i < argc; i++) { |
| 94 | char *opt = argv[i]; |
| 95 | |
| 96 | /** |
| 97 | * log [options]:: |
| 98 | * git log options. |
| 99 | **/ |
| 100 | if (!strcmp(opt, "log")) { |
| 101 | opt_request = REQ_LOG; |
| 102 | return i; |
| 103 | |
| 104 | /** |
| 105 | * diff [options]:: |
| 106 | * git diff options. |
| 107 | **/ |
| 108 | } else if (!strcmp(opt, "diff")) { |
| 109 | opt_request = REQ_DIFF; |
| 110 | return i; |
| 111 | |
| 112 | /** |
| 113 | * -l:: |
| 114 | * Start up in log view. |
| 115 | **/ |
| 116 | } else if (!strcmp(opt, "-l")) { |
| 117 | opt_request = REQ_LOG; |
| 118 | |
| 119 | /** |
| 120 | * -d:: |
| 121 | * Start up in diff view. |
| 122 | **/ |
| 123 | } else if (!strcmp(opt, "-d")) { |
| 124 | opt_request = REQ_DIFF; |
| 125 | |
| 126 | /** |
| 127 | * -n, --line-number:: |
| 128 | * Prefix line numbers in log and diff view. |
| 129 | **/ |
| 130 | } else if (!strcmp(opt, "-n") || |
| 131 | !strcmp(opt, "--line-number")) { |
| 132 | opt_line_number = 1; |
| 133 | |
| 134 | /** |
| 135 | * -v, --version:: |
| 136 | * Show version and exit. |
| 137 | **/ |
| 138 | } else if (!strcmp(opt, "-v") || |
| 139 | !strcmp(opt, "--version")) { |
| 140 | printf("tig version %s\n", VERSION); |
| 141 | return -1; |
| 142 | |
| 143 | /** |
| 144 | * ref:: |
| 145 | * Commit reference, symbolic or raw SHA1 ID. |
| 146 | **/ |
| 147 | } else if (opt[0] && opt[0] != '-') { |
| 148 | strncpy(head_id, opt, SIZEOF_ID); |
| 149 | strncpy(commit_id, opt, SIZEOF_ID); |
| 150 | |
| 151 | } else { |
| 152 | die("Unknown command: '%s'", opt); |
| 153 | } |
| 154 | } |
| 155 | |
| 156 | return i; |
| 157 | } |
| 158 | |
| 159 | |
| 160 | /* |
| 161 | * Line-oriented content detection. |
| 162 | */ |
| 163 | |
| 164 | enum line_type { |
| 165 | LINE_DEFAULT, |
| 166 | LINE_AUTHOR, |
| 167 | LINE_AUTHOR_IDENT, |
| 168 | LINE_COMMIT, |
| 169 | LINE_COMMITTER, |
| 170 | LINE_CURSOR, |
| 171 | LINE_DATE, |
| 172 | LINE_DIFF, |
| 173 | LINE_DIFF_ADD, |
| 174 | LINE_DIFF_CHUNK, |
| 175 | LINE_DIFF_COPY, |
| 176 | LINE_DIFF_DEL, |
| 177 | LINE_DIFF_DISSIM, |
| 178 | LINE_DIFF_NEWMODE, |
| 179 | LINE_DIFF_OLDMODE, |
| 180 | LINE_DIFF_RENAME, |
| 181 | LINE_DIFF_SIM, |
| 182 | LINE_DIFF_TREE, |
| 183 | LINE_INDEX, |
| 184 | LINE_MAIN_AUTHOR, |
| 185 | LINE_MAIN_COMMIT, |
| 186 | LINE_MAIN_DATE, |
| 187 | LINE_MAIN_DELIM, |
| 188 | LINE_MERGE, |
| 189 | LINE_PARENT, |
| 190 | LINE_STATUS, |
| 191 | LINE_TITLE, |
| 192 | LINE_TREE, |
| 193 | }; |
| 194 | |
| 195 | struct line_info { |
| 196 | enum line_type type; |
| 197 | char *line; |
| 198 | int linelen; |
| 199 | |
| 200 | int fg; |
| 201 | int bg; |
| 202 | int attr; |
| 203 | }; |
| 204 | |
| 205 | #define LINE(type, line, fg, bg, attr) \ |
| 206 | { LINE_##type, (line), sizeof(line) - 1, (fg), (bg), (attr) } |
| 207 | |
| 208 | static struct line_info line_info[] = { |
| 209 | /* Diff markup */ |
| 210 | LINE(DIFF, "diff --git ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 211 | LINE(INDEX, "index ", COLOR_BLUE, COLOR_TRANSP, 0), |
| 212 | LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_TRANSP, 0), |
| 213 | LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_TRANSP, 0), |
| 214 | LINE(DIFF_DEL, "-", COLOR_RED, COLOR_TRANSP, 0), |
| 215 | LINE(DIFF_OLDMODE, "old mode ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 216 | LINE(DIFF_NEWMODE, "new mode ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 217 | LINE(DIFF_COPY, "copy ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 218 | LINE(DIFF_RENAME, "rename ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 219 | LINE(DIFF_SIM, "similarity ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 220 | LINE(DIFF_DISSIM, "dissimilarity ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 221 | |
| 222 | /* Pretty print commit header */ |
| 223 | LINE(AUTHOR, "Author: ", COLOR_CYAN, COLOR_TRANSP, 0), |
| 224 | LINE(MERGE, "Merge: ", COLOR_BLUE, COLOR_TRANSP, 0), |
| 225 | LINE(DATE, "Date: ", COLOR_YELLOW, COLOR_TRANSP, 0), |
| 226 | |
| 227 | /* Raw commit header */ |
| 228 | LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_TRANSP, 0), |
| 229 | LINE(PARENT, "parent ", COLOR_BLUE, COLOR_TRANSP, 0), |
| 230 | LINE(TREE, "tree ", COLOR_BLUE, COLOR_TRANSP, 0), |
| 231 | LINE(AUTHOR_IDENT, "author ", COLOR_CYAN, COLOR_TRANSP, 0), |
| 232 | LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_TRANSP, 0), |
| 233 | |
| 234 | LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_TRANSP, 0), |
| 235 | |
| 236 | /* UI colors */ |
| 237 | LINE(DEFAULT, "", COLOR_TRANSP, COLOR_TRANSP, A_NORMAL), |
| 238 | LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), |
| 239 | LINE(STATUS, "", COLOR_GREEN, COLOR_TRANSP, 0), |
| 240 | LINE(TITLE, "", COLOR_YELLOW, COLOR_BLUE, A_BOLD), |
| 241 | LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_TRANSP, 0), |
| 242 | LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_TRANSP, 0), |
| 243 | LINE(MAIN_COMMIT, "", COLOR_TRANSP, COLOR_TRANSP, 0), |
| 244 | LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_TRANSP, 0), |
| 245 | }; |
| 246 | |
| 247 | static struct line_info * |
| 248 | get_line_info(char *line) |
| 249 | { |
| 250 | int linelen = strlen(line); |
| 251 | int i; |
| 252 | |
| 253 | for (i = 0; i < ARRAY_SIZE(line_info); i++) { |
| 254 | if (linelen < line_info[i].linelen |
| 255 | || strncmp(line_info[i].line, line, line_info[i].linelen)) |
| 256 | continue; |
| 257 | |
| 258 | return &line_info[i]; |
| 259 | } |
| 260 | |
| 261 | return NULL; |
| 262 | } |
| 263 | |
| 264 | static enum line_type |
| 265 | get_line_type(char *line) |
| 266 | { |
| 267 | struct line_info *info = get_line_info(line); |
| 268 | |
| 269 | return info ? info->type : LINE_DEFAULT; |
| 270 | } |
| 271 | |
| 272 | static int |
| 273 | get_line_attr(enum line_type type) |
| 274 | { |
| 275 | int i; |
| 276 | |
| 277 | for (i = 0; i < ARRAY_SIZE(line_info); i++) |
| 278 | if (line_info[i].type == type) |
| 279 | return COLOR_PAIR(line_info[i].type) | line_info[i].attr; |
| 280 | |
| 281 | return A_NORMAL; |
| 282 | } |
| 283 | |
| 284 | static void |
| 285 | init_colors(void) |
| 286 | { |
| 287 | int transparent_bg = COLOR_BLACK; |
| 288 | int transparent_fg = COLOR_WHITE; |
| 289 | int i; |
| 290 | |
| 291 | start_color(); |
| 292 | |
| 293 | if (use_default_colors() != ERR) { |
| 294 | transparent_bg = -1; |
| 295 | transparent_fg = -1; |
| 296 | } |
| 297 | |
| 298 | for (i = 0; i < ARRAY_SIZE(line_info); i++) { |
| 299 | struct line_info *info = &line_info[i]; |
| 300 | int bg = info->bg == COLOR_TRANSP ? transparent_bg : info->bg; |
| 301 | int fg = info->fg == COLOR_TRANSP ? transparent_fg : info->fg; |
| 302 | |
| 303 | init_pair(info->type, fg, bg); |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | |
| 308 | /** |
| 309 | * KEYS |
| 310 | * ---- |
| 311 | * |
| 312 | * d:: |
| 313 | * diff |
| 314 | * l:: |
| 315 | * log |
| 316 | * q:: |
| 317 | * quit |
| 318 | * r:: |
| 319 | * redraw screen |
| 320 | * s:: |
| 321 | * stop all background loading |
| 322 | * j:: |
| 323 | * down |
| 324 | * k:: |
| 325 | * up |
| 326 | * h, ?:: |
| 327 | * help |
| 328 | * v:: |
| 329 | * version |
| 330 | * |
| 331 | **/ |
| 332 | |
| 333 | #define HELP "(d)iff, (l)og, (m)ain, (q)uit, (v)ersion, (h)elp" |
| 334 | |
| 335 | struct keymap { |
| 336 | int alias; |
| 337 | int request; |
| 338 | }; |
| 339 | |
| 340 | struct keymap keymap[] = { |
| 341 | /* Cursor navigation */ |
| 342 | { KEY_UP, REQ_PREV_LINE }, |
| 343 | { 'k', REQ_PREV_LINE }, |
| 344 | { KEY_DOWN, REQ_NEXT_LINE }, |
| 345 | { 'j', REQ_NEXT_LINE }, |
| 346 | { KEY_HOME, REQ_FIRST_LINE }, |
| 347 | { KEY_END, REQ_LAST_LINE }, |
| 348 | { KEY_NPAGE, REQ_NEXT_PAGE }, |
| 349 | { KEY_PPAGE, REQ_PREV_PAGE }, |
| 350 | |
| 351 | /* Scrolling */ |
| 352 | { KEY_IC, REQ_SCR_BLINE }, /* scroll field backward a line */ |
| 353 | { KEY_DC, REQ_SCR_FLINE }, /* scroll field forward a line */ |
| 354 | { 's', REQ_SCR_FPAGE }, /* scroll field forward a page */ |
| 355 | { 'w', REQ_SCR_BPAGE }, /* scroll field backward a page */ |
| 356 | |
| 357 | { 'd', REQ_DIFF }, |
| 358 | { 'l', REQ_LOG }, |
| 359 | { 'm', REQ_MAIN }, |
| 360 | |
| 361 | { 'n', REQ_LINE_NUMBER }, |
| 362 | |
| 363 | /* No input from wgetch() with nodelay() enabled. */ |
| 364 | { ERR, REQ_UPDATE }, |
| 365 | |
| 366 | { KEY_ESC, REQ_QUIT }, |
| 367 | { 'q', REQ_QUIT }, |
| 368 | { 's', REQ_STOP }, |
| 369 | { 'v', REQ_VERSION }, |
| 370 | { 'r', REQ_REDRAW }, |
| 371 | }; |
| 372 | |
| 373 | static int |
| 374 | get_request(int request) |
| 375 | { |
| 376 | int i; |
| 377 | |
| 378 | for (i = 0; i < ARRAY_SIZE(keymap); i++) |
| 379 | if (keymap[i].alias == request) |
| 380 | return keymap[i].request; |
| 381 | |
| 382 | return request; |
| 383 | } |
| 384 | |
| 385 | |
| 386 | /* |
| 387 | * Viewer |
| 388 | */ |
| 389 | |
| 390 | struct view { |
| 391 | char *name; |
| 392 | char *cmd; |
| 393 | char *id; |
| 394 | |
| 395 | |
| 396 | /* Rendering */ |
| 397 | int (*read)(struct view *, char *); |
| 398 | int (*draw)(struct view *, unsigned int); |
| 399 | size_t objsize; /* Size of objects in the line index */ |
| 400 | |
| 401 | WINDOW *win; |
| 402 | int height, width; |
| 403 | |
| 404 | /* Navigation */ |
| 405 | unsigned long offset; /* Offset of the window top */ |
| 406 | unsigned long lineno; /* Current line number */ |
| 407 | |
| 408 | /* Buffering */ |
| 409 | unsigned long lines; /* Total number of lines */ |
| 410 | void **line; /* Line index */ |
| 411 | |
| 412 | /* Loading */ |
| 413 | FILE *pipe; |
| 414 | }; |
| 415 | |
| 416 | struct commit { |
| 417 | char id[41]; |
| 418 | char title[75]; |
| 419 | char author[75]; |
| 420 | struct tm time; |
| 421 | }; |
| 422 | |
| 423 | static int pager_draw(struct view *view, unsigned int lineno); |
| 424 | static int pager_read(struct view *view, char *line); |
| 425 | |
| 426 | static int main_draw(struct view *view, unsigned int lineno); |
| 427 | static int main_read(struct view *view, char *line); |
| 428 | |
| 429 | #define DIFF_CMD \ |
| 430 | "git log --stat -n1 %s ; echo; " \ |
| 431 | "git diff --find-copies-harder -B -C %s^ %s" |
| 432 | |
| 433 | #define LOG_CMD \ |
| 434 | "git log --stat -n100 %s" |
| 435 | |
| 436 | #define MAIN_CMD \ |
| 437 | "git log --stat --pretty=raw %s" |
| 438 | |
| 439 | /* The status window at the bottom. Used for polling keystrokes. */ |
| 440 | static WINDOW *status_win; |
| 441 | |
| 442 | static WINDOW *title_win; |
| 443 | |
| 444 | static unsigned int current_view; |
| 445 | static unsigned int nloading; |
| 446 | |
| 447 | static struct view views[]; |
| 448 | static struct view *display[]; |
| 449 | |
| 450 | static struct view views[] = { |
| 451 | { "diff", DIFF_CMD, commit_id, pager_read, pager_draw, sizeof(char) }, |
| 452 | { "log", LOG_CMD, head_id, pager_read, pager_draw, sizeof(char) }, |
| 453 | { "main", MAIN_CMD, head_id, main_read, main_draw, sizeof(struct commit) }, |
| 454 | }; |
| 455 | |
| 456 | static struct view *display[ARRAY_SIZE(views)]; |
| 457 | |
| 458 | |
| 459 | #define foreach_view(view, i) \ |
| 460 | for (i = 0; i < sizeof(display) && (view = display[i]); i++) |
| 461 | |
| 462 | static void |
| 463 | redraw_view(struct view *view) |
| 464 | { |
| 465 | int lineno; |
| 466 | |
| 467 | wclear(view->win); |
| 468 | wmove(view->win, 0, 0); |
| 469 | |
| 470 | for (lineno = 0; lineno < view->height; lineno++) { |
| 471 | if (!view->draw(view, lineno)) |
| 472 | break; |
| 473 | } |
| 474 | |
| 475 | redrawwin(view->win); |
| 476 | wrefresh(view->win); |
| 477 | } |
| 478 | |
| 479 | static void |
| 480 | resize_view(struct view *view) |
| 481 | { |
| 482 | int lines, cols; |
| 483 | |
| 484 | getmaxyx(stdscr, lines, cols); |
| 485 | |
| 486 | if (view->win) { |
| 487 | mvwin(view->win, 0, 0); |
| 488 | wresize(view->win, lines - 2, cols); |
| 489 | |
| 490 | } else { |
| 491 | view->win = newwin(lines - 2, 0, 0, 0); |
| 492 | if (!view->win) { |
| 493 | report("failed to create %s view", view->name); |
| 494 | return; |
| 495 | } |
| 496 | scrollok(view->win, TRUE); |
| 497 | } |
| 498 | |
| 499 | getmaxyx(view->win, view->height, view->width); |
| 500 | } |
| 501 | |
| 502 | /* FIXME: Fix percentage. */ |
| 503 | static void |
| 504 | report_position(struct view *view, int all) |
| 505 | { |
| 506 | report(all ? "line %d of %d (%d%%) viewing from %d" |
| 507 | : "line %d of %d", |
| 508 | view->lineno + 1, |
| 509 | view->lines, |
| 510 | view->lines ? view->offset * 100 / view->lines : 0, |
| 511 | view->offset); |
| 512 | } |
| 513 | |
| 514 | |
| 515 | static void |
| 516 | move_view(struct view *view, int lines) |
| 517 | { |
| 518 | /* The rendering expects the new offset. */ |
| 519 | view->offset += lines; |
| 520 | |
| 521 | assert(0 <= view->offset && view->offset < view->lines); |
| 522 | assert(lines); |
| 523 | |
| 524 | if (view->height < (lines > 0 ? lines : -lines)) { |
| 525 | redraw_view(view); |
| 526 | |
| 527 | } else { |
| 528 | int line = lines > 0 ? view->height - lines : 0; |
| 529 | int end = line + (lines > 0 ? lines : -lines); |
| 530 | |
| 531 | wscrl(view->win, lines); |
| 532 | |
| 533 | for (; line < end; line++) { |
| 534 | if (!view->draw(view, line)) |
| 535 | break; |
| 536 | } |
| 537 | } |
| 538 | |
| 539 | /* Move current line into the view. */ |
| 540 | if (view->lineno < view->offset) { |
| 541 | view->lineno = view->offset; |
| 542 | view->draw(view, 0); |
| 543 | |
| 544 | } else if (view->lineno >= view->offset + view->height) { |
| 545 | view->lineno = view->offset + view->height - 1; |
| 546 | view->draw(view, view->lineno - view->offset); |
| 547 | } |
| 548 | |
| 549 | assert(view->offset <= view->lineno && view->lineno <= view->lines); |
| 550 | |
| 551 | redrawwin(view->win); |
| 552 | wrefresh(view->win); |
| 553 | |
| 554 | report_position(view, lines); |
| 555 | } |
| 556 | |
| 557 | static void |
| 558 | scroll_view(struct view *view, int request) |
| 559 | { |
| 560 | int lines = 1; |
| 561 | |
| 562 | switch (request) { |
| 563 | case REQ_SCR_FPAGE: |
| 564 | lines = view->height; |
| 565 | case REQ_SCR_FLINE: |
| 566 | if (view->offset + lines > view->lines) |
| 567 | lines = view->lines - view->offset; |
| 568 | |
| 569 | if (lines == 0 || view->offset + view->height >= view->lines) { |
| 570 | report("already at last line"); |
| 571 | return; |
| 572 | } |
| 573 | break; |
| 574 | |
| 575 | case REQ_SCR_BPAGE: |
| 576 | lines = view->height; |
| 577 | case REQ_SCR_BLINE: |
| 578 | if (lines > view->offset) |
| 579 | lines = view->offset; |
| 580 | |
| 581 | if (lines == 0) { |
| 582 | report("already at first line"); |
| 583 | return; |
| 584 | } |
| 585 | |
| 586 | lines = -lines; |
| 587 | break; |
| 588 | } |
| 589 | |
| 590 | move_view(view, lines); |
| 591 | } |
| 592 | |
| 593 | static void |
| 594 | navigate_view(struct view *view, int request) |
| 595 | { |
| 596 | int steps; |
| 597 | |
| 598 | switch (request) { |
| 599 | case REQ_FIRST_LINE: |
| 600 | steps = -view->lineno; |
| 601 | break; |
| 602 | |
| 603 | case REQ_LAST_LINE: |
| 604 | steps = view->lines - view->lineno - 1; |
| 605 | break; |
| 606 | |
| 607 | case REQ_PREV_PAGE: |
| 608 | steps = view->height > view->lineno |
| 609 | ? -view->lineno : -view->height; |
| 610 | break; |
| 611 | |
| 612 | case REQ_NEXT_PAGE: |
| 613 | steps = view->lineno + view->height >= view->lines |
| 614 | ? view->lines - view->lineno - 1 : view->height; |
| 615 | break; |
| 616 | |
| 617 | case REQ_PREV_LINE: |
| 618 | steps = -1; |
| 619 | break; |
| 620 | |
| 621 | case REQ_NEXT_LINE: |
| 622 | steps = 1; |
| 623 | break; |
| 624 | } |
| 625 | |
| 626 | if (steps < 0 && view->lineno == 0) { |
| 627 | report("already at first line"); |
| 628 | return; |
| 629 | |
| 630 | } else if (steps > 0 && view->lineno + 1 == view->lines) { |
| 631 | report("already at last line"); |
| 632 | return; |
| 633 | } |
| 634 | |
| 635 | view->lineno += steps; |
| 636 | view->draw(view, view->lineno - steps - view->offset); |
| 637 | |
| 638 | if (view->lineno < view->offset || |
| 639 | view->lineno >= view->offset + view->height) { |
| 640 | if (steps < 0 && -steps > view->offset) { |
| 641 | steps = -view->offset; |
| 642 | |
| 643 | } else if (steps > 0) { |
| 644 | if (view->lineno == view->lines - 1 && |
| 645 | view->lines > view->height) { |
| 646 | steps = view->lines - view->offset - 1; |
| 647 | if (steps >= view->height) |
| 648 | steps -= view->height - 1; |
| 649 | } |
| 650 | } |
| 651 | |
| 652 | move_view(view, steps); |
| 653 | return; |
| 654 | } |
| 655 | |
| 656 | /* Draw the cursor line */ |
| 657 | view->draw(view, view->lineno - view->offset); |
| 658 | |
| 659 | redrawwin(view->win); |
| 660 | wrefresh(view->win); |
| 661 | |
| 662 | report_position(view, view->height); |
| 663 | } |
| 664 | |
| 665 | |
| 666 | |
| 667 | static bool |
| 668 | begin_update(struct view *view) |
| 669 | { |
| 670 | char buf[1024]; |
| 671 | |
| 672 | if (view->cmd) { |
| 673 | char *id = view->id; |
| 674 | |
| 675 | if (snprintf(buf, sizeof(buf), view->cmd, id, id, id) < sizeof(buf)) |
| 676 | view->pipe = popen(buf, "r"); |
| 677 | |
| 678 | if (!view->pipe) |
| 679 | return FALSE; |
| 680 | |
| 681 | if (nloading++ == 0) |
| 682 | nodelay(status_win, TRUE); |
| 683 | } |
| 684 | |
| 685 | display[current_view] = view; |
| 686 | |
| 687 | view->offset = 0; |
| 688 | view->lines = 0; |
| 689 | view->lineno = 0; |
| 690 | |
| 691 | return TRUE; |
| 692 | } |
| 693 | |
| 694 | static void |
| 695 | end_update(struct view *view) |
| 696 | { |
| 697 | wattrset(view->win, A_NORMAL); |
| 698 | pclose(view->pipe); |
| 699 | view->pipe = NULL; |
| 700 | |
| 701 | if (nloading-- == 1) |
| 702 | nodelay(status_win, FALSE); |
| 703 | } |
| 704 | |
| 705 | static int |
| 706 | update_view(struct view *view) |
| 707 | { |
| 708 | char buffer[BUFSIZ]; |
| 709 | char *line; |
| 710 | void **tmp; |
| 711 | int redraw; |
| 712 | int lines = view->height; |
| 713 | |
| 714 | if (!view->pipe) |
| 715 | return TRUE; |
| 716 | |
| 717 | /* Only redraw after the first reading session. */ |
| 718 | /* FIXME: ... and possibly more. */ |
| 719 | redraw = view->height > view->lines; |
| 720 | |
| 721 | tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines)); |
| 722 | if (!tmp) |
| 723 | goto alloc_error; |
| 724 | |
| 725 | view->line = tmp; |
| 726 | |
| 727 | while ((line = fgets(buffer, sizeof(buffer), view->pipe))) { |
| 728 | int linelen; |
| 729 | |
| 730 | linelen = strlen(line); |
| 731 | if (linelen) |
| 732 | line[linelen - 1] = 0; |
| 733 | |
| 734 | if (!view->read(view, line)) |
| 735 | goto alloc_error; |
| 736 | |
| 737 | if (lines-- == 1) |
| 738 | break; |
| 739 | } |
| 740 | |
| 741 | if (redraw) |
| 742 | redraw_view(view); |
| 743 | |
| 744 | if (ferror(view->pipe)) { |
| 745 | report("failed to read %s", view->cmd); |
| 746 | goto end; |
| 747 | |
| 748 | } else if (feof(view->pipe)) { |
| 749 | report_position(view, 0); |
| 750 | goto end; |
| 751 | } |
| 752 | |
| 753 | return TRUE; |
| 754 | |
| 755 | alloc_error: |
| 756 | report("allocation failure"); |
| 757 | |
| 758 | end: |
| 759 | end_update(view); |
| 760 | return FALSE; |
| 761 | } |
| 762 | |
| 763 | |
| 764 | static struct view * |
| 765 | switch_view(struct view *prev, int request) |
| 766 | { |
| 767 | struct view *view = &views[request - REQ_OFFSET]; |
| 768 | struct view *displayed; |
| 769 | int i; |
| 770 | |
| 771 | if (view == prev) { |
| 772 | foreach_view (displayed, i) ; |
| 773 | |
| 774 | if (i == 1) |
| 775 | report("already in %s view", view->name); |
| 776 | else |
| 777 | report("FIXME: Maximize"); |
| 778 | |
| 779 | return view; |
| 780 | |
| 781 | } else { |
| 782 | foreach_view (displayed, i) { |
| 783 | if (view == displayed) { |
| 784 | current_view = i; |
| 785 | report("new current view"); |
| 786 | return view; |
| 787 | } |
| 788 | } |
| 789 | } |
| 790 | |
| 791 | if (!view->win) |
| 792 | resize_view(view); |
| 793 | |
| 794 | /* Reload */ |
| 795 | |
| 796 | if (view->line) { |
| 797 | for (i = 0; i < view->lines; i++) |
| 798 | if (view->line[i]) |
| 799 | free(view->line[i]); |
| 800 | |
| 801 | free(view->line); |
| 802 | view->line = NULL; |
| 803 | } |
| 804 | |
| 805 | if (prev && prev->pipe) |
| 806 | end_update(prev); |
| 807 | |
| 808 | if (begin_update(view)) { |
| 809 | if (!view->cmd) |
| 810 | report("%s", HELP); |
| 811 | else |
| 812 | report("loading..."); |
| 813 | } |
| 814 | |
| 815 | return view; |
| 816 | } |
| 817 | |
| 818 | |
| 819 | /* Process a keystroke */ |
| 820 | static int |
| 821 | view_driver(struct view *view, int key) |
| 822 | { |
| 823 | int request = get_request(key); |
| 824 | int i; |
| 825 | |
| 826 | switch (request) { |
| 827 | case REQ_NEXT_LINE: |
| 828 | case REQ_PREV_LINE: |
| 829 | case REQ_FIRST_LINE: |
| 830 | case REQ_LAST_LINE: |
| 831 | case REQ_NEXT_PAGE: |
| 832 | case REQ_PREV_PAGE: |
| 833 | if (view) |
| 834 | navigate_view(view, request); |
| 835 | break; |
| 836 | |
| 837 | case REQ_SCR_FLINE: |
| 838 | case REQ_SCR_BLINE: |
| 839 | case REQ_SCR_FPAGE: |
| 840 | case REQ_SCR_BPAGE: |
| 841 | if (view) |
| 842 | scroll_view(view, request); |
| 843 | break; |
| 844 | |
| 845 | case REQ_MAIN: |
| 846 | case REQ_LOG: |
| 847 | case REQ_DIFF: |
| 848 | view = switch_view(view, request); |
| 849 | break; |
| 850 | |
| 851 | case REQ_LINE_NUMBER: |
| 852 | opt_line_number = !opt_line_number; |
| 853 | redraw_view(view); |
| 854 | break; |
| 855 | |
| 856 | case REQ_REDRAW: |
| 857 | redraw_view(view); |
| 858 | break; |
| 859 | |
| 860 | case REQ_STOP: |
| 861 | foreach_view (view, i) { |
| 862 | if (view->pipe) { |
| 863 | end_update(view); |
| 864 | scroll_view(view, 0); |
| 865 | } |
| 866 | } |
| 867 | break; |
| 868 | |
| 869 | case REQ_VERSION: |
| 870 | report("version %s", VERSION); |
| 871 | return TRUE; |
| 872 | |
| 873 | case REQ_UPDATE: |
| 874 | doupdate(); |
| 875 | return TRUE; |
| 876 | |
| 877 | case REQ_QUIT: |
| 878 | return FALSE; |
| 879 | |
| 880 | default: |
| 881 | report(HELP); |
| 882 | return TRUE; |
| 883 | } |
| 884 | |
| 885 | return TRUE; |
| 886 | } |
| 887 | |
| 888 | |
| 889 | /* |
| 890 | * Rendering |
| 891 | */ |
| 892 | |
| 893 | static int |
| 894 | pager_draw(struct view *view, unsigned int lineno) |
| 895 | { |
| 896 | enum line_type type; |
| 897 | char *line; |
| 898 | int attr; |
| 899 | |
| 900 | if (view->offset + lineno >= view->lines) |
| 901 | return FALSE; |
| 902 | |
| 903 | line = view->line[view->offset + lineno]; |
| 904 | type = get_line_type(line); |
| 905 | |
| 906 | if (view->offset + lineno == view->lineno) { |
| 907 | if (type == LINE_COMMIT) |
| 908 | strncpy(commit_id, line + 7, SIZEOF_ID); |
| 909 | type = LINE_CURSOR; |
| 910 | } |
| 911 | |
| 912 | attr = get_line_attr(type); |
| 913 | wattrset(view->win, attr); |
| 914 | |
| 915 | if (opt_line_number) { |
| 916 | mvwprintw(view->win, lineno, 0, "%4d: ", view->offset + lineno + 1); |
| 917 | while (line) { |
| 918 | if (*line == '\t') { |
| 919 | waddstr(view->win, " "); |
| 920 | line++; |
| 921 | } else { |
| 922 | char *tab = strchr(line, '\t'); |
| 923 | |
| 924 | if (tab) |
| 925 | waddnstr(view->win, line, tab - line); |
| 926 | else |
| 927 | waddstr(view->win, line); |
| 928 | line = tab; |
| 929 | } |
| 930 | } |
| 931 | waddstr(view->win, line); |
| 932 | |
| 933 | } else { |
| 934 | /* No empty lines makes cursor drawing and clearing implicit. */ |
| 935 | if (!*line) |
| 936 | line = " "; |
| 937 | mvwaddstr(view->win, lineno, 0, line); |
| 938 | } |
| 939 | |
| 940 | return TRUE; |
| 941 | } |
| 942 | |
| 943 | static int |
| 944 | pager_read(struct view *view, char *line) |
| 945 | { |
| 946 | view->line[view->lines] = strdup(line); |
| 947 | if (!view->line[view->lines]) |
| 948 | return FALSE; |
| 949 | |
| 950 | view->lines++; |
| 951 | return TRUE; |
| 952 | } |
| 953 | |
| 954 | static int |
| 955 | main_draw(struct view *view, unsigned int lineno) |
| 956 | { |
| 957 | char buf[21]; |
| 958 | struct commit *commit; |
| 959 | enum line_type type; |
| 960 | int cols = 0; |
| 961 | size_t timelen; |
| 962 | |
| 963 | if (view->offset + lineno >= view->lines) |
| 964 | return FALSE; |
| 965 | |
| 966 | commit = view->line[view->offset + lineno]; |
| 967 | if (!commit) return FALSE; |
| 968 | |
| 969 | if (view->offset + lineno == view->lineno) { |
| 970 | strncpy(commit_id, commit->id, SIZEOF_ID); |
| 971 | type = LINE_CURSOR; |
| 972 | } else { |
| 973 | type = LINE_MAIN_COMMIT; |
| 974 | } |
| 975 | |
| 976 | wmove(view->win, lineno, cols); |
| 977 | wattrset(view->win, get_line_attr(LINE_MAIN_DATE)); |
| 978 | |
| 979 | timelen = strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S ", &commit->time); |
| 980 | waddnstr(view->win, buf, timelen); |
| 981 | |
| 982 | cols += 20; |
| 983 | wmove(view->win, lineno, cols); |
| 984 | wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR)); |
| 985 | |
| 986 | if (strlen(commit->author) > 19) { |
| 987 | waddnstr(view->win, commit->author, 18); |
| 988 | wattrset(view->win, get_line_attr(LINE_MAIN_DELIM)); |
| 989 | waddch(view->win, '~'); |
| 990 | } else { |
| 991 | waddstr(view->win, commit->author); |
| 992 | } |
| 993 | |
| 994 | cols += 20; |
| 995 | wattrset(view->win, A_NORMAL); |
| 996 | mvwaddch(view->win, lineno, cols, ACS_LTEE); |
| 997 | wattrset(view->win, get_line_attr(type)); |
| 998 | mvwaddstr(view->win, lineno, cols + 2, commit->title); |
| 999 | wattrset(view->win, A_NORMAL); |
| 1000 | |
| 1001 | return TRUE; |
| 1002 | } |
| 1003 | |
| 1004 | static int |
| 1005 | main_read(struct view *view, char *line) |
| 1006 | { |
| 1007 | enum line_type type = get_line_type(line); |
| 1008 | struct commit *commit; |
| 1009 | |
| 1010 | switch (type) { |
| 1011 | case LINE_COMMIT: |
| 1012 | commit = calloc(1, sizeof(struct commit)); |
| 1013 | if (!commit) |
| 1014 | return FALSE; |
| 1015 | |
| 1016 | line += sizeof("commit ") - 1; |
| 1017 | |
| 1018 | view->line[view->lines++] = commit; |
| 1019 | strncpy(commit->id, line, sizeof(commit->id)); |
| 1020 | break; |
| 1021 | |
| 1022 | case LINE_AUTHOR_IDENT: |
| 1023 | { |
| 1024 | char *ident = line + sizeof("author ") - 1; |
| 1025 | char *end = strchr(ident, '<'); |
| 1026 | |
| 1027 | if (end) { |
| 1028 | for (; end > ident && isspace(end[-1]); end--) ; |
| 1029 | *end = 0; |
| 1030 | } |
| 1031 | |
| 1032 | commit = view->line[view->lines - 1]; |
| 1033 | strncpy(commit->author, ident, sizeof(commit->author)); |
| 1034 | |
| 1035 | if (end) { |
| 1036 | char *secs = strchr(end + 1, '>'); |
| 1037 | char *zone; |
| 1038 | time_t time; |
| 1039 | |
| 1040 | if (!secs || secs[1] != ' ') |
| 1041 | break; |
| 1042 | |
| 1043 | secs += 2; |
| 1044 | time = (time_t) atol(secs); |
| 1045 | zone = strchr(secs, ' '); |
| 1046 | if (zone && strlen(zone) == sizeof(" +0700") - 1) { |
| 1047 | long tz; |
| 1048 | |
| 1049 | zone++; |
| 1050 | tz = ('0' - zone[1]) * 60 * 60 * 10; |
| 1051 | tz += ('0' - zone[2]) * 60 * 60; |
| 1052 | tz += ('0' - zone[3]) * 60; |
| 1053 | tz += ('0' - zone[4]) * 60; |
| 1054 | |
| 1055 | if (zone[0] == '-') |
| 1056 | tz = -tz; |
| 1057 | |
| 1058 | time -= tz; |
| 1059 | } |
| 1060 | gmtime_r(&time, &commit->time); |
| 1061 | } |
| 1062 | break; |
| 1063 | } |
| 1064 | default: |
| 1065 | commit = view->line[view->lines - 1]; |
| 1066 | if (!commit->title[0] && |
| 1067 | !strncmp(line, " ", 4) && |
| 1068 | !isspace(line[5])) |
| 1069 | strncpy(commit->title, line + 4, sizeof(commit->title)); |
| 1070 | } |
| 1071 | |
| 1072 | return TRUE; |
| 1073 | } |
| 1074 | |
| 1075 | |
| 1076 | /* |
| 1077 | * Main |
| 1078 | */ |
| 1079 | |
| 1080 | static void |
| 1081 | quit(int sig) |
| 1082 | { |
| 1083 | if (status_win) |
| 1084 | delwin(status_win); |
| 1085 | if (title_win) |
| 1086 | delwin(title_win); |
| 1087 | endwin(); |
| 1088 | |
| 1089 | /* FIXME: Shutdown gracefully. */ |
| 1090 | |
| 1091 | exit(0); |
| 1092 | } |
| 1093 | |
| 1094 | static void die(const char *err, ...) |
| 1095 | { |
| 1096 | va_list args; |
| 1097 | |
| 1098 | endwin(); |
| 1099 | |
| 1100 | va_start(args, err); |
| 1101 | fputs("tig: ", stderr); |
| 1102 | vfprintf(stderr, err, args); |
| 1103 | fputs("\n", stderr); |
| 1104 | va_end(args); |
| 1105 | |
| 1106 | exit(1); |
| 1107 | } |
| 1108 | |
| 1109 | static void |
| 1110 | report(const char *msg, ...) |
| 1111 | { |
| 1112 | va_list args; |
| 1113 | |
| 1114 | werase(title_win); |
| 1115 | wmove(title_win, 0, 0); |
| 1116 | wprintw(title_win, "commit %s", commit_id); |
| 1117 | wrefresh(title_win); |
| 1118 | |
| 1119 | va_start(args, msg); |
| 1120 | |
| 1121 | werase(status_win); |
| 1122 | wmove(status_win, 0, 0); |
| 1123 | |
| 1124 | #if 0 |
| 1125 | if (display[current_view]) |
| 1126 | wprintw(status_win, "%s %4s: ", commit_id, display[current_view]->name); |
| 1127 | #endif |
| 1128 | vwprintw(status_win, msg, args); |
| 1129 | wrefresh(status_win); |
| 1130 | |
| 1131 | va_end(args); |
| 1132 | } |
| 1133 | |
| 1134 | int |
| 1135 | main(int argc, char *argv[]) |
| 1136 | { |
| 1137 | int x, y; |
| 1138 | int request; |
| 1139 | int git_cmd; |
| 1140 | |
| 1141 | signal(SIGINT, quit); |
| 1142 | |
| 1143 | git_cmd = parse_options(argc, argv); |
| 1144 | if (git_cmd < 0) |
| 1145 | return 0; |
| 1146 | |
| 1147 | request = opt_request; |
| 1148 | |
| 1149 | initscr(); /* initialize the curses library */ |
| 1150 | nonl(); /* tell curses not to do NL->CR/NL on output */ |
| 1151 | cbreak(); /* take input chars one at a time, no wait for \n */ |
| 1152 | noecho(); /* don't echo input */ |
| 1153 | leaveok(stdscr, TRUE); |
| 1154 | /* curs_set(0); */ |
| 1155 | |
| 1156 | if (has_colors()) |
| 1157 | init_colors(); |
| 1158 | |
| 1159 | getmaxyx(stdscr, y, x); |
| 1160 | status_win = newwin(1, 0, y - 1, 0); |
| 1161 | if (!status_win) |
| 1162 | die("Failed to create status window"); |
| 1163 | |
| 1164 | title_win = newwin(1, 0, y - 2, 0); |
| 1165 | if (!title_win) |
| 1166 | die("Failed to create title window"); |
| 1167 | |
| 1168 | /* Enable keyboard mapping */ |
| 1169 | keypad(status_win, TRUE); |
| 1170 | wbkgdset(status_win, get_line_attr(LINE_STATUS)); |
| 1171 | wbkgdset(title_win, get_line_attr(LINE_TITLE)); |
| 1172 | |
| 1173 | while (view_driver(display[current_view], request)) { |
| 1174 | struct view *view; |
| 1175 | int i; |
| 1176 | |
| 1177 | foreach_view (view, i) { |
| 1178 | if (view->pipe) { |
| 1179 | update_view(view); |
| 1180 | } |
| 1181 | } |
| 1182 | |
| 1183 | /* Refresh, accept single keystroke of input */ |
| 1184 | request = wgetch(status_win); |
| 1185 | if (request == KEY_RESIZE) { |
| 1186 | int lines, cols; |
| 1187 | |
| 1188 | getmaxyx(stdscr, lines, cols); |
| 1189 | |
| 1190 | mvwin(status_win, lines - 1, 0); |
| 1191 | wresize(status_win, 1, cols - 1); |
| 1192 | |
| 1193 | mvwin(title_win, lines - 2, 0); |
| 1194 | wresize(title_win, 1, cols - 1); |
| 1195 | } |
| 1196 | } |
| 1197 | |
| 1198 | quit(0); |
| 1199 | |
| 1200 | return 0; |
| 1201 | } |
| 1202 | |
| 1203 | /** |
| 1204 | * COPYRIGHT |
| 1205 | * --------- |
| 1206 | * Copyright (c) Jonas Fonseca, 2006 |
| 1207 | * |
| 1208 | * This program is free software; you can redistribute it and/or modify |
| 1209 | * it under the terms of the GNU General Public License as published by |
| 1210 | * the Free Software Foundation; either version 2 of the License, or |
| 1211 | * (at your option) any later version. |
| 1212 | * |
| 1213 | * SEE ALSO |
| 1214 | * -------- |
| 1215 | * link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)], |
| 1216 | * link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)] |
| 1217 | **/ |