| 1 | /* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk> |
| 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 | #ifndef VERSION |
| 15 | #define VERSION "tig-0.3" |
| 16 | #endif |
| 17 | |
| 18 | #ifndef DEBUG |
| 19 | #define NDEBUG |
| 20 | #endif |
| 21 | |
| 22 | #include <assert.h> |
| 23 | #include <errno.h> |
| 24 | #include <ctype.h> |
| 25 | #include <signal.h> |
| 26 | #include <stdarg.h> |
| 27 | #include <stdio.h> |
| 28 | #include <stdlib.h> |
| 29 | #include <string.h> |
| 30 | #include <unistd.h> |
| 31 | #include <time.h> |
| 32 | |
| 33 | #include <curses.h> |
| 34 | |
| 35 | #if __GNUC__ >= 3 |
| 36 | #define __NORETURN __attribute__((__noreturn__)) |
| 37 | #else |
| 38 | #define __NORETURN |
| 39 | #endif |
| 40 | |
| 41 | static void __NORETURN die(const char *err, ...); |
| 42 | static void report(const char *msg, ...); |
| 43 | static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int)); |
| 44 | static void set_nonblocking_input(bool loading); |
| 45 | static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed); |
| 46 | |
| 47 | #define ABS(x) ((x) >= 0 ? (x) : -(x)) |
| 48 | #define MIN(x, y) ((x) < (y) ? (x) : (y)) |
| 49 | |
| 50 | #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0])) |
| 51 | #define STRING_SIZE(x) (sizeof(x) - 1) |
| 52 | |
| 53 | #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */ |
| 54 | #define SIZEOF_CMD 1024 /* Size of command buffer. */ |
| 55 | #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */ |
| 56 | |
| 57 | /* This color name can be used to refer to the default term colors. */ |
| 58 | #define COLOR_DEFAULT (-1) |
| 59 | |
| 60 | /* The format and size of the date column in the main view. */ |
| 61 | #define DATE_FORMAT "%Y-%m-%d %H:%M" |
| 62 | #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ") |
| 63 | |
| 64 | #define AUTHOR_COLS 20 |
| 65 | |
| 66 | /* The default interval between line numbers. */ |
| 67 | #define NUMBER_INTERVAL 1 |
| 68 | |
| 69 | #define TABSIZE 8 |
| 70 | |
| 71 | #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3) |
| 72 | |
| 73 | #define TIG_LS_REMOTE \ |
| 74 | "git ls-remote . 2>/dev/null" |
| 75 | |
| 76 | #define TIG_DIFF_CMD \ |
| 77 | "git show --patch-with-stat --find-copies-harder -B -C %s" |
| 78 | |
| 79 | #define TIG_LOG_CMD \ |
| 80 | "git log --cc --stat -n100 %s" |
| 81 | |
| 82 | #define TIG_MAIN_CMD \ |
| 83 | "git log --topo-order --stat --pretty=raw %s" |
| 84 | |
| 85 | /* XXX: Needs to be defined to the empty string. */ |
| 86 | #define TIG_HELP_CMD "" |
| 87 | #define TIG_PAGER_CMD "" |
| 88 | |
| 89 | /* Some ascii-shorthands fitted into the ncurses namespace. */ |
| 90 | #define KEY_TAB '\t' |
| 91 | #define KEY_RETURN '\r' |
| 92 | #define KEY_ESC 27 |
| 93 | |
| 94 | |
| 95 | struct ref { |
| 96 | char *name; /* Ref name; tag or head names are shortened. */ |
| 97 | char id[41]; /* Commit SHA1 ID */ |
| 98 | unsigned int tag:1; /* Is it a tag? */ |
| 99 | unsigned int next:1; /* For ref lists: are there more refs? */ |
| 100 | }; |
| 101 | |
| 102 | static struct ref **get_refs(char *id); |
| 103 | |
| 104 | struct int_map { |
| 105 | const char *name; |
| 106 | int namelen; |
| 107 | int value; |
| 108 | }; |
| 109 | |
| 110 | static int |
| 111 | set_from_int_map(struct int_map *map, size_t map_size, |
| 112 | int *value, const char *name, int namelen) |
| 113 | { |
| 114 | |
| 115 | int i; |
| 116 | |
| 117 | for (i = 0; i < map_size; i++) |
| 118 | if (namelen == map[i].namelen && |
| 119 | !strncasecmp(name, map[i].name, namelen)) { |
| 120 | *value = map[i].value; |
| 121 | return OK; |
| 122 | } |
| 123 | |
| 124 | return ERR; |
| 125 | } |
| 126 | |
| 127 | |
| 128 | /* |
| 129 | * String helpers |
| 130 | */ |
| 131 | |
| 132 | static inline void |
| 133 | string_ncopy(char *dst, const char *src, int dstlen) |
| 134 | { |
| 135 | strncpy(dst, src, dstlen - 1); |
| 136 | dst[dstlen - 1] = 0; |
| 137 | |
| 138 | } |
| 139 | |
| 140 | /* Shorthand for safely copying into a fixed buffer. */ |
| 141 | #define string_copy(dst, src) \ |
| 142 | string_ncopy(dst, src, sizeof(dst)) |
| 143 | |
| 144 | static char * |
| 145 | chomp_string(char *name) |
| 146 | { |
| 147 | int namelen; |
| 148 | |
| 149 | while (isspace(*name)) |
| 150 | name++; |
| 151 | |
| 152 | namelen = strlen(name) - 1; |
| 153 | while (namelen > 0 && isspace(name[namelen])) |
| 154 | name[namelen--] = 0; |
| 155 | |
| 156 | return name; |
| 157 | } |
| 158 | |
| 159 | static bool |
| 160 | string_nformat(char *buf, size_t bufsize, int *bufpos, const char *fmt, ...) |
| 161 | { |
| 162 | va_list args; |
| 163 | int pos = bufpos ? *bufpos : 0; |
| 164 | |
| 165 | va_start(args, fmt); |
| 166 | pos += vsnprintf(buf + pos, bufsize - pos, fmt, args); |
| 167 | va_end(args); |
| 168 | |
| 169 | if (bufpos) |
| 170 | *bufpos = pos; |
| 171 | |
| 172 | return pos >= bufsize ? FALSE : TRUE; |
| 173 | } |
| 174 | |
| 175 | #define string_format(buf, fmt, args...) \ |
| 176 | string_nformat(buf, sizeof(buf), NULL, fmt, args) |
| 177 | |
| 178 | #define string_format_from(buf, from, fmt, args...) \ |
| 179 | string_nformat(buf, sizeof(buf), from, fmt, args) |
| 180 | |
| 181 | static int |
| 182 | string_enum_compare(const char *str1, const char *str2, int len) |
| 183 | { |
| 184 | size_t i; |
| 185 | |
| 186 | #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.') |
| 187 | |
| 188 | /* Diff-Header == DIFF_HEADER */ |
| 189 | for (i = 0; i < len; i++) { |
| 190 | if (toupper(str1[i]) == toupper(str2[i])) |
| 191 | continue; |
| 192 | |
| 193 | if (string_enum_sep(str1[i]) && |
| 194 | string_enum_sep(str2[i])) |
| 195 | continue; |
| 196 | |
| 197 | return str1[i] - str2[i]; |
| 198 | } |
| 199 | |
| 200 | return 0; |
| 201 | } |
| 202 | |
| 203 | /* Shell quoting |
| 204 | * |
| 205 | * NOTE: The following is a slightly modified copy of the git project's shell |
| 206 | * quoting routines found in the quote.c file. |
| 207 | * |
| 208 | * Help to copy the thing properly quoted for the shell safety. any single |
| 209 | * quote is replaced with '\'', any exclamation point is replaced with '\!', |
| 210 | * and the whole thing is enclosed in a |
| 211 | * |
| 212 | * E.g. |
| 213 | * original sq_quote result |
| 214 | * name ==> name ==> 'name' |
| 215 | * a b ==> a b ==> 'a b' |
| 216 | * a'b ==> a'\''b ==> 'a'\''b' |
| 217 | * a!b ==> a'\!'b ==> 'a'\!'b' |
| 218 | */ |
| 219 | |
| 220 | static size_t |
| 221 | sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src) |
| 222 | { |
| 223 | char c; |
| 224 | |
| 225 | #define BUFPUT(x) do { if (bufsize < SIZEOF_CMD) buf[bufsize++] = (x); } while (0) |
| 226 | |
| 227 | BUFPUT('\''); |
| 228 | while ((c = *src++)) { |
| 229 | if (c == '\'' || c == '!') { |
| 230 | BUFPUT('\''); |
| 231 | BUFPUT('\\'); |
| 232 | BUFPUT(c); |
| 233 | BUFPUT('\''); |
| 234 | } else { |
| 235 | BUFPUT(c); |
| 236 | } |
| 237 | } |
| 238 | BUFPUT('\''); |
| 239 | |
| 240 | return bufsize; |
| 241 | } |
| 242 | |
| 243 | |
| 244 | /* |
| 245 | * User requests |
| 246 | */ |
| 247 | |
| 248 | #define REQ_INFO \ |
| 249 | /* XXX: Keep the view request first and in sync with views[]. */ \ |
| 250 | REQ_GROUP("View switching") \ |
| 251 | REQ_(VIEW_MAIN, "Show main view"), \ |
| 252 | REQ_(VIEW_DIFF, "Show diff view"), \ |
| 253 | REQ_(VIEW_LOG, "Show log view"), \ |
| 254 | REQ_(VIEW_HELP, "Show help page"), \ |
| 255 | REQ_(VIEW_PAGER, "Show pager view"), \ |
| 256 | \ |
| 257 | REQ_GROUP("View manipulation") \ |
| 258 | REQ_(ENTER, "Enter current line and scroll"), \ |
| 259 | REQ_(NEXT, "Move to next"), \ |
| 260 | REQ_(PREVIOUS, "Move to previous"), \ |
| 261 | REQ_(VIEW_NEXT, "Move focus to next view"), \ |
| 262 | REQ_(VIEW_CLOSE, "Close the current view"), \ |
| 263 | REQ_(QUIT, "Close all views and quit"), \ |
| 264 | \ |
| 265 | REQ_GROUP("Cursor navigation") \ |
| 266 | REQ_(MOVE_UP, "Move cursor one line up"), \ |
| 267 | REQ_(MOVE_DOWN, "Move cursor one line down"), \ |
| 268 | REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \ |
| 269 | REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \ |
| 270 | REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \ |
| 271 | REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \ |
| 272 | \ |
| 273 | REQ_GROUP("Scrolling") \ |
| 274 | REQ_(SCROLL_LINE_UP, "Scroll one line up"), \ |
| 275 | REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \ |
| 276 | REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \ |
| 277 | REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \ |
| 278 | \ |
| 279 | REQ_GROUP("Misc") \ |
| 280 | REQ_(PROMPT, "Bring up the prompt"), \ |
| 281 | REQ_(SCREEN_UPDATE, "Update the screen"), \ |
| 282 | REQ_(SCREEN_REDRAW, "Redraw the screen"), \ |
| 283 | REQ_(SCREEN_RESIZE, "Resize the screen"), \ |
| 284 | REQ_(SHOW_VERSION, "Show version information"), \ |
| 285 | REQ_(STOP_LOADING, "Stop all loading views"), \ |
| 286 | REQ_(TOGGLE_LINENO, "Toggle line numbers"), \ |
| 287 | REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization") |
| 288 | |
| 289 | |
| 290 | /* User action requests. */ |
| 291 | enum request { |
| 292 | #define REQ_GROUP(help) |
| 293 | #define REQ_(req, help) REQ_##req |
| 294 | |
| 295 | /* Offset all requests to avoid conflicts with ncurses getch values. */ |
| 296 | REQ_OFFSET = KEY_MAX + 1, |
| 297 | REQ_INFO, |
| 298 | REQ_UNKNOWN, |
| 299 | |
| 300 | #undef REQ_GROUP |
| 301 | #undef REQ_ |
| 302 | }; |
| 303 | |
| 304 | struct request_info { |
| 305 | enum request request; |
| 306 | char *name; |
| 307 | int namelen; |
| 308 | char *help; |
| 309 | }; |
| 310 | |
| 311 | static struct request_info req_info[] = { |
| 312 | #define REQ_GROUP(help) { 0, NULL, 0, (help) }, |
| 313 | #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) } |
| 314 | REQ_INFO |
| 315 | #undef REQ_GROUP |
| 316 | #undef REQ_ |
| 317 | }; |
| 318 | |
| 319 | static enum request |
| 320 | get_request(const char *name) |
| 321 | { |
| 322 | int namelen = strlen(name); |
| 323 | int i; |
| 324 | |
| 325 | for (i = 0; i < ARRAY_SIZE(req_info); i++) |
| 326 | if (req_info[i].namelen == namelen && |
| 327 | !string_enum_compare(req_info[i].name, name, namelen)) |
| 328 | return req_info[i].request; |
| 329 | |
| 330 | return REQ_UNKNOWN; |
| 331 | } |
| 332 | |
| 333 | |
| 334 | /* |
| 335 | * Options |
| 336 | */ |
| 337 | |
| 338 | static const char usage[] = |
| 339 | VERSION " (" __DATE__ ")\n" |
| 340 | "\n" |
| 341 | "Usage: tig [options]\n" |
| 342 | " or: tig [options] [--] [git log options]\n" |
| 343 | " or: tig [options] log [git log options]\n" |
| 344 | " or: tig [options] diff [git diff options]\n" |
| 345 | " or: tig [options] show [git show options]\n" |
| 346 | " or: tig [options] < [git command output]\n" |
| 347 | "\n" |
| 348 | "Options:\n" |
| 349 | " -l Start up in log view\n" |
| 350 | " -d Start up in diff view\n" |
| 351 | " -n[I], --line-number[=I] Show line numbers with given interval\n" |
| 352 | " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n" |
| 353 | " -- Mark end of tig options\n" |
| 354 | " -v, --version Show version and exit\n" |
| 355 | " -h, --help Show help message and exit\n"; |
| 356 | |
| 357 | /* Option and state variables. */ |
| 358 | static bool opt_line_number = FALSE; |
| 359 | static bool opt_rev_graph = TRUE; |
| 360 | static int opt_num_interval = NUMBER_INTERVAL; |
| 361 | static int opt_tab_size = TABSIZE; |
| 362 | static enum request opt_request = REQ_VIEW_MAIN; |
| 363 | static char opt_cmd[SIZEOF_CMD] = ""; |
| 364 | static char opt_encoding[20] = ""; |
| 365 | static bool opt_utf8 = TRUE; |
| 366 | static FILE *opt_pipe = NULL; |
| 367 | |
| 368 | enum option_type { |
| 369 | OPT_NONE, |
| 370 | OPT_INT, |
| 371 | }; |
| 372 | |
| 373 | static bool |
| 374 | check_option(char *opt, char short_name, char *name, enum option_type type, ...) |
| 375 | { |
| 376 | va_list args; |
| 377 | char *value = ""; |
| 378 | int *number; |
| 379 | |
| 380 | if (opt[0] != '-') |
| 381 | return FALSE; |
| 382 | |
| 383 | if (opt[1] == '-') { |
| 384 | int namelen = strlen(name); |
| 385 | |
| 386 | opt += 2; |
| 387 | |
| 388 | if (strncmp(opt, name, namelen)) |
| 389 | return FALSE; |
| 390 | |
| 391 | if (opt[namelen] == '=') |
| 392 | value = opt + namelen + 1; |
| 393 | |
| 394 | } else { |
| 395 | if (!short_name || opt[1] != short_name) |
| 396 | return FALSE; |
| 397 | value = opt + 2; |
| 398 | } |
| 399 | |
| 400 | va_start(args, type); |
| 401 | if (type == OPT_INT) { |
| 402 | number = va_arg(args, int *); |
| 403 | if (isdigit(*value)) |
| 404 | *number = atoi(value); |
| 405 | } |
| 406 | va_end(args); |
| 407 | |
| 408 | return TRUE; |
| 409 | } |
| 410 | |
| 411 | /* Returns the index of log or diff command or -1 to exit. */ |
| 412 | static bool |
| 413 | parse_options(int argc, char *argv[]) |
| 414 | { |
| 415 | int i; |
| 416 | |
| 417 | for (i = 1; i < argc; i++) { |
| 418 | char *opt = argv[i]; |
| 419 | |
| 420 | if (!strcmp(opt, "-l")) { |
| 421 | opt_request = REQ_VIEW_LOG; |
| 422 | continue; |
| 423 | } |
| 424 | |
| 425 | if (!strcmp(opt, "-d")) { |
| 426 | opt_request = REQ_VIEW_DIFF; |
| 427 | continue; |
| 428 | } |
| 429 | |
| 430 | if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) { |
| 431 | opt_line_number = TRUE; |
| 432 | continue; |
| 433 | } |
| 434 | |
| 435 | if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) { |
| 436 | opt_tab_size = MIN(opt_tab_size, TABSIZE); |
| 437 | continue; |
| 438 | } |
| 439 | |
| 440 | if (check_option(opt, 'v', "version", OPT_NONE)) { |
| 441 | printf("tig version %s\n", VERSION); |
| 442 | return FALSE; |
| 443 | } |
| 444 | |
| 445 | if (check_option(opt, 'h', "help", OPT_NONE)) { |
| 446 | printf(usage); |
| 447 | return FALSE; |
| 448 | } |
| 449 | |
| 450 | if (!strcmp(opt, "--")) { |
| 451 | i++; |
| 452 | break; |
| 453 | } |
| 454 | |
| 455 | if (!strcmp(opt, "log") || |
| 456 | !strcmp(opt, "diff") || |
| 457 | !strcmp(opt, "show")) { |
| 458 | opt_request = opt[0] == 'l' |
| 459 | ? REQ_VIEW_LOG : REQ_VIEW_DIFF; |
| 460 | break; |
| 461 | } |
| 462 | |
| 463 | if (opt[0] && opt[0] != '-') |
| 464 | break; |
| 465 | |
| 466 | die("unknown option '%s'\n\n%s", opt, usage); |
| 467 | } |
| 468 | |
| 469 | if (!isatty(STDIN_FILENO)) { |
| 470 | opt_request = REQ_VIEW_PAGER; |
| 471 | opt_pipe = stdin; |
| 472 | |
| 473 | } else if (i < argc) { |
| 474 | size_t buf_size; |
| 475 | |
| 476 | if (opt_request == REQ_VIEW_MAIN) |
| 477 | /* XXX: This is vulnerable to the user overriding |
| 478 | * options required for the main view parser. */ |
| 479 | string_copy(opt_cmd, "git log --stat --pretty=raw"); |
| 480 | else |
| 481 | string_copy(opt_cmd, "git"); |
| 482 | buf_size = strlen(opt_cmd); |
| 483 | |
| 484 | while (buf_size < sizeof(opt_cmd) && i < argc) { |
| 485 | opt_cmd[buf_size++] = ' '; |
| 486 | buf_size = sq_quote(opt_cmd, buf_size, argv[i++]); |
| 487 | } |
| 488 | |
| 489 | if (buf_size >= sizeof(opt_cmd)) |
| 490 | die("command too long"); |
| 491 | |
| 492 | opt_cmd[buf_size] = 0; |
| 493 | |
| 494 | } |
| 495 | |
| 496 | if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8")) |
| 497 | opt_utf8 = FALSE; |
| 498 | |
| 499 | return TRUE; |
| 500 | } |
| 501 | |
| 502 | |
| 503 | /* |
| 504 | * Line-oriented content detection. |
| 505 | */ |
| 506 | |
| 507 | #define LINE_INFO \ |
| 508 | LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 509 | LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \ |
| 510 | LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \ |
| 511 | LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \ |
| 512 | LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \ |
| 513 | LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 514 | LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 515 | LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 516 | LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 517 | LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 518 | LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 519 | LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 520 | LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 521 | LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \ |
| 522 | LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \ |
| 523 | LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \ |
| 524 | LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \ |
| 525 | LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 526 | LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 527 | LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 528 | LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \ |
| 529 | LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \ |
| 530 | LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \ |
| 531 | LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \ |
| 532 | LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \ |
| 533 | LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \ |
| 534 | LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \ |
| 535 | LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \ |
| 536 | LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \ |
| 537 | LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \ |
| 538 | LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \ |
| 539 | LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \ |
| 540 | LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \ |
| 541 | LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \ |
| 542 | LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \ |
| 543 | LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \ |
| 544 | LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \ |
| 545 | LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \ |
| 546 | |
| 547 | enum line_type { |
| 548 | #define LINE(type, line, fg, bg, attr) \ |
| 549 | LINE_##type |
| 550 | LINE_INFO |
| 551 | #undef LINE |
| 552 | }; |
| 553 | |
| 554 | struct line_info { |
| 555 | const char *name; /* Option name. */ |
| 556 | int namelen; /* Size of option name. */ |
| 557 | const char *line; /* The start of line to match. */ |
| 558 | int linelen; /* Size of string to match. */ |
| 559 | int fg, bg, attr; /* Color and text attributes for the lines. */ |
| 560 | }; |
| 561 | |
| 562 | static struct line_info line_info[] = { |
| 563 | #define LINE(type, line, fg, bg, attr) \ |
| 564 | { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) } |
| 565 | LINE_INFO |
| 566 | #undef LINE |
| 567 | }; |
| 568 | |
| 569 | static enum line_type |
| 570 | get_line_type(char *line) |
| 571 | { |
| 572 | int linelen = strlen(line); |
| 573 | enum line_type type; |
| 574 | |
| 575 | for (type = 0; type < ARRAY_SIZE(line_info); type++) |
| 576 | /* Case insensitive search matches Signed-off-by lines better. */ |
| 577 | if (linelen >= line_info[type].linelen && |
| 578 | !strncasecmp(line_info[type].line, line, line_info[type].linelen)) |
| 579 | return type; |
| 580 | |
| 581 | return LINE_DEFAULT; |
| 582 | } |
| 583 | |
| 584 | static inline int |
| 585 | get_line_attr(enum line_type type) |
| 586 | { |
| 587 | assert(type < ARRAY_SIZE(line_info)); |
| 588 | return COLOR_PAIR(type) | line_info[type].attr; |
| 589 | } |
| 590 | |
| 591 | static struct line_info * |
| 592 | get_line_info(char *name, int namelen) |
| 593 | { |
| 594 | enum line_type type; |
| 595 | |
| 596 | for (type = 0; type < ARRAY_SIZE(line_info); type++) |
| 597 | if (namelen == line_info[type].namelen && |
| 598 | !string_enum_compare(line_info[type].name, name, namelen)) |
| 599 | return &line_info[type]; |
| 600 | |
| 601 | return NULL; |
| 602 | } |
| 603 | |
| 604 | static void |
| 605 | init_colors(void) |
| 606 | { |
| 607 | int default_bg = COLOR_BLACK; |
| 608 | int default_fg = COLOR_WHITE; |
| 609 | enum line_type type; |
| 610 | |
| 611 | start_color(); |
| 612 | |
| 613 | if (use_default_colors() != ERR) { |
| 614 | default_bg = -1; |
| 615 | default_fg = -1; |
| 616 | } |
| 617 | |
| 618 | for (type = 0; type < ARRAY_SIZE(line_info); type++) { |
| 619 | struct line_info *info = &line_info[type]; |
| 620 | int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg; |
| 621 | int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg; |
| 622 | |
| 623 | init_pair(type, fg, bg); |
| 624 | } |
| 625 | } |
| 626 | |
| 627 | struct line { |
| 628 | enum line_type type; |
| 629 | void *data; /* User data */ |
| 630 | }; |
| 631 | |
| 632 | |
| 633 | /* |
| 634 | * Keys |
| 635 | */ |
| 636 | |
| 637 | struct keybinding { |
| 638 | int alias; |
| 639 | enum request request; |
| 640 | struct keybinding *next; |
| 641 | }; |
| 642 | |
| 643 | static struct keybinding default_keybindings[] = { |
| 644 | /* View switching */ |
| 645 | { 'm', REQ_VIEW_MAIN }, |
| 646 | { 'd', REQ_VIEW_DIFF }, |
| 647 | { 'l', REQ_VIEW_LOG }, |
| 648 | { 'p', REQ_VIEW_PAGER }, |
| 649 | { 'h', REQ_VIEW_HELP }, |
| 650 | { '?', REQ_VIEW_HELP }, |
| 651 | |
| 652 | /* View manipulation */ |
| 653 | { 'q', REQ_VIEW_CLOSE }, |
| 654 | { KEY_TAB, REQ_VIEW_NEXT }, |
| 655 | { KEY_RETURN, REQ_ENTER }, |
| 656 | { KEY_UP, REQ_PREVIOUS }, |
| 657 | { KEY_DOWN, REQ_NEXT }, |
| 658 | |
| 659 | /* Cursor navigation */ |
| 660 | { 'k', REQ_MOVE_UP }, |
| 661 | { 'j', REQ_MOVE_DOWN }, |
| 662 | { KEY_HOME, REQ_MOVE_FIRST_LINE }, |
| 663 | { KEY_END, REQ_MOVE_LAST_LINE }, |
| 664 | { KEY_NPAGE, REQ_MOVE_PAGE_DOWN }, |
| 665 | { ' ', REQ_MOVE_PAGE_DOWN }, |
| 666 | { KEY_PPAGE, REQ_MOVE_PAGE_UP }, |
| 667 | { 'b', REQ_MOVE_PAGE_UP }, |
| 668 | { '-', REQ_MOVE_PAGE_UP }, |
| 669 | |
| 670 | /* Scrolling */ |
| 671 | { KEY_IC, REQ_SCROLL_LINE_UP }, |
| 672 | { KEY_DC, REQ_SCROLL_LINE_DOWN }, |
| 673 | { 'w', REQ_SCROLL_PAGE_UP }, |
| 674 | { 's', REQ_SCROLL_PAGE_DOWN }, |
| 675 | |
| 676 | /* Misc */ |
| 677 | { 'Q', REQ_QUIT }, |
| 678 | { 'z', REQ_STOP_LOADING }, |
| 679 | { 'v', REQ_SHOW_VERSION }, |
| 680 | { 'r', REQ_SCREEN_REDRAW }, |
| 681 | { 'n', REQ_TOGGLE_LINENO }, |
| 682 | { 'g', REQ_TOGGLE_REV_GRAPH}, |
| 683 | { ':', REQ_PROMPT }, |
| 684 | |
| 685 | /* wgetch() with nodelay() enabled returns ERR when there's no input. */ |
| 686 | { ERR, REQ_SCREEN_UPDATE }, |
| 687 | |
| 688 | /* Use the ncurses SIGWINCH handler. */ |
| 689 | { KEY_RESIZE, REQ_SCREEN_RESIZE }, |
| 690 | }; |
| 691 | |
| 692 | #define KEYMAP_INFO \ |
| 693 | KEYMAP_(GENERIC), \ |
| 694 | KEYMAP_(MAIN), \ |
| 695 | KEYMAP_(DIFF), \ |
| 696 | KEYMAP_(LOG), \ |
| 697 | KEYMAP_(PAGER), \ |
| 698 | KEYMAP_(HELP) \ |
| 699 | |
| 700 | enum keymap { |
| 701 | #define KEYMAP_(name) KEYMAP_##name |
| 702 | KEYMAP_INFO |
| 703 | #undef KEYMAP_ |
| 704 | }; |
| 705 | |
| 706 | static struct int_map keymap_table[] = { |
| 707 | #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name } |
| 708 | KEYMAP_INFO |
| 709 | #undef KEYMAP_ |
| 710 | }; |
| 711 | |
| 712 | #define set_keymap(map, name) \ |
| 713 | set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name)) |
| 714 | |
| 715 | static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)]; |
| 716 | |
| 717 | static void |
| 718 | add_keybinding(enum keymap keymap, enum request request, int key) |
| 719 | { |
| 720 | struct keybinding *keybinding; |
| 721 | |
| 722 | keybinding = calloc(1, sizeof(*keybinding)); |
| 723 | if (!keybinding) |
| 724 | die("Failed to allocate keybinding"); |
| 725 | |
| 726 | keybinding->alias = key; |
| 727 | keybinding->request = request; |
| 728 | keybinding->next = keybindings[keymap]; |
| 729 | keybindings[keymap] = keybinding; |
| 730 | } |
| 731 | |
| 732 | /* Looks for a key binding first in the given map, then in the generic map, and |
| 733 | * lastly in the default keybindings. */ |
| 734 | static enum request |
| 735 | get_keybinding(enum keymap keymap, int key) |
| 736 | { |
| 737 | struct keybinding *kbd; |
| 738 | int i; |
| 739 | |
| 740 | for (kbd = keybindings[keymap]; kbd; kbd = kbd->next) |
| 741 | if (kbd->alias == key) |
| 742 | return kbd->request; |
| 743 | |
| 744 | for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next) |
| 745 | if (kbd->alias == key) |
| 746 | return kbd->request; |
| 747 | |
| 748 | for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) |
| 749 | if (default_keybindings[i].alias == key) |
| 750 | return default_keybindings[i].request; |
| 751 | |
| 752 | return (enum request) key; |
| 753 | } |
| 754 | |
| 755 | |
| 756 | struct key { |
| 757 | char *name; |
| 758 | int value; |
| 759 | }; |
| 760 | |
| 761 | static struct key key_table[] = { |
| 762 | { "Enter", KEY_RETURN }, |
| 763 | { "Space", ' ' }, |
| 764 | { "Backspace", KEY_BACKSPACE }, |
| 765 | { "Tab", KEY_TAB }, |
| 766 | { "Escape", KEY_ESC }, |
| 767 | { "Left", KEY_LEFT }, |
| 768 | { "Right", KEY_RIGHT }, |
| 769 | { "Up", KEY_UP }, |
| 770 | { "Down", KEY_DOWN }, |
| 771 | { "Insert", KEY_IC }, |
| 772 | { "Delete", KEY_DC }, |
| 773 | { "Home", KEY_HOME }, |
| 774 | { "End", KEY_END }, |
| 775 | { "PageUp", KEY_PPAGE }, |
| 776 | { "PageDown", KEY_NPAGE }, |
| 777 | { "F1", KEY_F(1) }, |
| 778 | { "F2", KEY_F(2) }, |
| 779 | { "F3", KEY_F(3) }, |
| 780 | { "F4", KEY_F(4) }, |
| 781 | { "F5", KEY_F(5) }, |
| 782 | { "F6", KEY_F(6) }, |
| 783 | { "F7", KEY_F(7) }, |
| 784 | { "F8", KEY_F(8) }, |
| 785 | { "F9", KEY_F(9) }, |
| 786 | { "F10", KEY_F(10) }, |
| 787 | { "F11", KEY_F(11) }, |
| 788 | { "F12", KEY_F(12) }, |
| 789 | }; |
| 790 | |
| 791 | static int |
| 792 | get_key_value(const char *name) |
| 793 | { |
| 794 | int i; |
| 795 | |
| 796 | for (i = 0; i < ARRAY_SIZE(key_table); i++) |
| 797 | if (!strcasecmp(key_table[i].name, name)) |
| 798 | return key_table[i].value; |
| 799 | |
| 800 | if (strlen(name) == 1 && isprint(*name)) |
| 801 | return (int) *name; |
| 802 | |
| 803 | return ERR; |
| 804 | } |
| 805 | |
| 806 | static char * |
| 807 | get_key(enum request request) |
| 808 | { |
| 809 | static char buf[BUFSIZ]; |
| 810 | static char key_char[] = "'X'"; |
| 811 | int pos = 0; |
| 812 | char *sep = " "; |
| 813 | int i; |
| 814 | |
| 815 | buf[pos] = 0; |
| 816 | |
| 817 | for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) { |
| 818 | struct keybinding *keybinding = &default_keybindings[i]; |
| 819 | char *seq = NULL; |
| 820 | int key; |
| 821 | |
| 822 | if (keybinding->request != request) |
| 823 | continue; |
| 824 | |
| 825 | for (key = 0; key < ARRAY_SIZE(key_table); key++) |
| 826 | if (key_table[key].value == keybinding->alias) |
| 827 | seq = key_table[key].name; |
| 828 | |
| 829 | if (seq == NULL && |
| 830 | keybinding->alias < 127 && |
| 831 | isprint(keybinding->alias)) { |
| 832 | key_char[1] = (char) keybinding->alias; |
| 833 | seq = key_char; |
| 834 | } |
| 835 | |
| 836 | if (!seq) |
| 837 | seq = "'?'"; |
| 838 | |
| 839 | if (!string_format_from(buf, &pos, "%s%s", sep, seq)) |
| 840 | return "Too many keybindings!"; |
| 841 | sep = ", "; |
| 842 | } |
| 843 | |
| 844 | return buf; |
| 845 | } |
| 846 | |
| 847 | |
| 848 | /* |
| 849 | * User config file handling. |
| 850 | */ |
| 851 | |
| 852 | static struct int_map color_map[] = { |
| 853 | #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name } |
| 854 | COLOR_MAP(DEFAULT), |
| 855 | COLOR_MAP(BLACK), |
| 856 | COLOR_MAP(BLUE), |
| 857 | COLOR_MAP(CYAN), |
| 858 | COLOR_MAP(GREEN), |
| 859 | COLOR_MAP(MAGENTA), |
| 860 | COLOR_MAP(RED), |
| 861 | COLOR_MAP(WHITE), |
| 862 | COLOR_MAP(YELLOW), |
| 863 | }; |
| 864 | |
| 865 | #define set_color(color, name) \ |
| 866 | set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name)) |
| 867 | |
| 868 | static struct int_map attr_map[] = { |
| 869 | #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name } |
| 870 | ATTR_MAP(NORMAL), |
| 871 | ATTR_MAP(BLINK), |
| 872 | ATTR_MAP(BOLD), |
| 873 | ATTR_MAP(DIM), |
| 874 | ATTR_MAP(REVERSE), |
| 875 | ATTR_MAP(STANDOUT), |
| 876 | ATTR_MAP(UNDERLINE), |
| 877 | }; |
| 878 | |
| 879 | #define set_attribute(attr, name) \ |
| 880 | set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name)) |
| 881 | |
| 882 | static int config_lineno; |
| 883 | static bool config_errors; |
| 884 | static char *config_msg; |
| 885 | |
| 886 | /* Wants: object fgcolor bgcolor [attr] */ |
| 887 | static int |
| 888 | option_color_command(int argc, char *argv[]) |
| 889 | { |
| 890 | struct line_info *info; |
| 891 | |
| 892 | if (argc != 3 && argc != 4) { |
| 893 | config_msg = "Wrong number of arguments given to color command"; |
| 894 | return ERR; |
| 895 | } |
| 896 | |
| 897 | info = get_line_info(argv[0], strlen(argv[0])); |
| 898 | if (!info) { |
| 899 | config_msg = "Unknown color name"; |
| 900 | return ERR; |
| 901 | } |
| 902 | |
| 903 | if (set_color(&info->fg, argv[1]) == ERR) { |
| 904 | config_msg = "Unknown color"; |
| 905 | return ERR; |
| 906 | } |
| 907 | |
| 908 | if (set_color(&info->bg, argv[2]) == ERR) { |
| 909 | config_msg = "Unknown color"; |
| 910 | return ERR; |
| 911 | } |
| 912 | |
| 913 | if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) { |
| 914 | config_msg = "Unknown attribute"; |
| 915 | return ERR; |
| 916 | } |
| 917 | |
| 918 | return OK; |
| 919 | } |
| 920 | |
| 921 | /* Wants: name = value */ |
| 922 | static int |
| 923 | option_set_command(int argc, char *argv[]) |
| 924 | { |
| 925 | if (argc != 3) { |
| 926 | config_msg = "Wrong number of arguments given to set command"; |
| 927 | return ERR; |
| 928 | } |
| 929 | |
| 930 | if (strcmp(argv[1], "=")) { |
| 931 | config_msg = "No value assigned"; |
| 932 | return ERR; |
| 933 | } |
| 934 | |
| 935 | if (!strcmp(argv[0], "show-rev-graph")) { |
| 936 | opt_rev_graph = (!strcmp(argv[2], "1") || |
| 937 | !strcmp(argv[2], "true") || |
| 938 | !strcmp(argv[2], "yes")); |
| 939 | return OK; |
| 940 | } |
| 941 | |
| 942 | if (!strcmp(argv[0], "line-number-interval")) { |
| 943 | opt_num_interval = atoi(argv[2]); |
| 944 | return OK; |
| 945 | } |
| 946 | |
| 947 | if (!strcmp(argv[0], "tab-size")) { |
| 948 | opt_tab_size = atoi(argv[2]); |
| 949 | return OK; |
| 950 | } |
| 951 | |
| 952 | if (!strcmp(argv[0], "encoding")) { |
| 953 | string_copy(opt_encoding, argv[2]); |
| 954 | return OK; |
| 955 | } |
| 956 | |
| 957 | return ERR; |
| 958 | } |
| 959 | |
| 960 | /* Wants: mode request key */ |
| 961 | static int |
| 962 | option_bind_command(int argc, char *argv[]) |
| 963 | { |
| 964 | enum request request; |
| 965 | int keymap; |
| 966 | int key; |
| 967 | |
| 968 | if (argc != 3) { |
| 969 | config_msg = "Wrong number of arguments given to bind command"; |
| 970 | return ERR; |
| 971 | } |
| 972 | |
| 973 | if (set_keymap(&keymap, argv[0]) == ERR) { |
| 974 | config_msg = "Unknown key map"; |
| 975 | return ERR; |
| 976 | } |
| 977 | |
| 978 | key = get_key_value(argv[1]); |
| 979 | if (key == ERR) { |
| 980 | config_msg = "Unknown key"; |
| 981 | return ERR; |
| 982 | } |
| 983 | |
| 984 | request = get_request(argv[2]); |
| 985 | if (request == REQ_UNKNOWN) { |
| 986 | config_msg = "Unknown request name"; |
| 987 | return ERR; |
| 988 | } |
| 989 | |
| 990 | add_keybinding(keymap, request, key); |
| 991 | |
| 992 | return OK; |
| 993 | } |
| 994 | |
| 995 | static int |
| 996 | set_option(char *opt, char *value) |
| 997 | { |
| 998 | char *argv[16]; |
| 999 | int valuelen; |
| 1000 | int argc = 0; |
| 1001 | |
| 1002 | /* Tokenize */ |
| 1003 | while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) { |
| 1004 | argv[argc++] = value; |
| 1005 | |
| 1006 | value += valuelen; |
| 1007 | if (!*value) |
| 1008 | break; |
| 1009 | |
| 1010 | *value++ = 0; |
| 1011 | while (isspace(*value)) |
| 1012 | value++; |
| 1013 | } |
| 1014 | |
| 1015 | if (!strcmp(opt, "color")) |
| 1016 | return option_color_command(argc, argv); |
| 1017 | |
| 1018 | if (!strcmp(opt, "set")) |
| 1019 | return option_set_command(argc, argv); |
| 1020 | |
| 1021 | if (!strcmp(opt, "bind")) |
| 1022 | return option_bind_command(argc, argv); |
| 1023 | |
| 1024 | return ERR; |
| 1025 | } |
| 1026 | |
| 1027 | static int |
| 1028 | read_option(char *opt, int optlen, char *value, int valuelen) |
| 1029 | { |
| 1030 | config_lineno++; |
| 1031 | config_msg = "Internal error"; |
| 1032 | |
| 1033 | optlen = strcspn(opt, "#;"); |
| 1034 | if (optlen == 0) { |
| 1035 | /* The whole line is a commend or empty. */ |
| 1036 | return OK; |
| 1037 | |
| 1038 | } else if (opt[optlen] != 0) { |
| 1039 | /* Part of the option name is a comment, so the value part |
| 1040 | * should be ignored. */ |
| 1041 | valuelen = 0; |
| 1042 | opt[optlen] = value[valuelen] = 0; |
| 1043 | } else { |
| 1044 | /* Else look for comment endings in the value. */ |
| 1045 | valuelen = strcspn(value, "#;"); |
| 1046 | value[valuelen] = 0; |
| 1047 | } |
| 1048 | |
| 1049 | if (set_option(opt, value) == ERR) { |
| 1050 | fprintf(stderr, "Error on line %d, near '%.*s' option: %s\n", |
| 1051 | config_lineno, optlen, opt, config_msg); |
| 1052 | config_errors = TRUE; |
| 1053 | } |
| 1054 | |
| 1055 | /* Always keep going if errors are encountered. */ |
| 1056 | return OK; |
| 1057 | } |
| 1058 | |
| 1059 | static int |
| 1060 | load_options(void) |
| 1061 | { |
| 1062 | char *home = getenv("HOME"); |
| 1063 | char buf[1024]; |
| 1064 | FILE *file; |
| 1065 | |
| 1066 | config_lineno = 0; |
| 1067 | config_errors = FALSE; |
| 1068 | |
| 1069 | if (!home || !string_format(buf, "%s/.tigrc", home)) |
| 1070 | return ERR; |
| 1071 | |
| 1072 | /* It's ok that the file doesn't exist. */ |
| 1073 | file = fopen(buf, "r"); |
| 1074 | if (!file) |
| 1075 | return OK; |
| 1076 | |
| 1077 | if (read_properties(file, " \t", read_option) == ERR || |
| 1078 | config_errors == TRUE) |
| 1079 | fprintf(stderr, "Errors while loading %s.\n", buf); |
| 1080 | |
| 1081 | return OK; |
| 1082 | } |
| 1083 | |
| 1084 | |
| 1085 | /* |
| 1086 | * The viewer |
| 1087 | */ |
| 1088 | |
| 1089 | struct view; |
| 1090 | struct view_ops; |
| 1091 | |
| 1092 | /* The display array of active views and the index of the current view. */ |
| 1093 | static struct view *display[2]; |
| 1094 | static unsigned int current_view; |
| 1095 | |
| 1096 | #define foreach_view(view, i) \ |
| 1097 | for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++) |
| 1098 | |
| 1099 | #define displayed_views() (display[1] != NULL ? 2 : 1) |
| 1100 | |
| 1101 | /* Current head and commit ID */ |
| 1102 | static char ref_commit[SIZEOF_REF] = "HEAD"; |
| 1103 | static char ref_head[SIZEOF_REF] = "HEAD"; |
| 1104 | |
| 1105 | struct view { |
| 1106 | const char *name; /* View name */ |
| 1107 | const char *cmd_fmt; /* Default command line format */ |
| 1108 | const char *cmd_env; /* Command line set via environment */ |
| 1109 | const char *id; /* Points to either of ref_{head,commit} */ |
| 1110 | |
| 1111 | struct view_ops *ops; /* View operations */ |
| 1112 | |
| 1113 | enum keymap keymap; /* What keymap does this view have */ |
| 1114 | |
| 1115 | char cmd[SIZEOF_CMD]; /* Command buffer */ |
| 1116 | char ref[SIZEOF_REF]; /* Hovered commit reference */ |
| 1117 | char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */ |
| 1118 | |
| 1119 | int height, width; /* The width and height of the main window */ |
| 1120 | WINDOW *win; /* The main window */ |
| 1121 | WINDOW *title; /* The title window living below the main window */ |
| 1122 | |
| 1123 | /* Navigation */ |
| 1124 | unsigned long offset; /* Offset of the window top */ |
| 1125 | unsigned long lineno; /* Current line number */ |
| 1126 | |
| 1127 | /* If non-NULL, points to the view that opened this view. If this view |
| 1128 | * is closed tig will switch back to the parent view. */ |
| 1129 | struct view *parent; |
| 1130 | |
| 1131 | /* Buffering */ |
| 1132 | unsigned long lines; /* Total number of lines */ |
| 1133 | struct line *line; /* Line index */ |
| 1134 | unsigned long line_size;/* Total number of allocated lines */ |
| 1135 | unsigned int digits; /* Number of digits in the lines member. */ |
| 1136 | |
| 1137 | /* Loading */ |
| 1138 | FILE *pipe; |
| 1139 | time_t start_time; |
| 1140 | }; |
| 1141 | |
| 1142 | struct view_ops { |
| 1143 | /* What type of content being displayed. Used in the title bar. */ |
| 1144 | const char *type; |
| 1145 | /* Draw one line; @lineno must be < view->height. */ |
| 1146 | bool (*draw)(struct view *view, struct line *line, unsigned int lineno); |
| 1147 | /* Read one line; updates view->line. */ |
| 1148 | bool (*read)(struct view *view, char *data); |
| 1149 | /* Depending on view, change display based on current line. */ |
| 1150 | bool (*enter)(struct view *view, struct line *line); |
| 1151 | }; |
| 1152 | |
| 1153 | static struct view_ops pager_ops; |
| 1154 | static struct view_ops main_ops; |
| 1155 | |
| 1156 | #define VIEW_STR(name, cmd, env, ref, ops, map) \ |
| 1157 | { name, cmd, #env, ref, ops, map} |
| 1158 | |
| 1159 | #define VIEW_(id, name, ops, ref) \ |
| 1160 | VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id) |
| 1161 | |
| 1162 | |
| 1163 | static struct view views[] = { |
| 1164 | VIEW_(MAIN, "main", &main_ops, ref_head), |
| 1165 | VIEW_(DIFF, "diff", &pager_ops, ref_commit), |
| 1166 | VIEW_(LOG, "log", &pager_ops, ref_head), |
| 1167 | VIEW_(HELP, "help", &pager_ops, "static"), |
| 1168 | VIEW_(PAGER, "pager", &pager_ops, "static"), |
| 1169 | }; |
| 1170 | |
| 1171 | #define VIEW(req) (&views[(req) - REQ_OFFSET - 1]) |
| 1172 | |
| 1173 | |
| 1174 | static bool |
| 1175 | draw_view_line(struct view *view, unsigned int lineno) |
| 1176 | { |
| 1177 | if (view->offset + lineno >= view->lines) |
| 1178 | return FALSE; |
| 1179 | |
| 1180 | return view->ops->draw(view, &view->line[view->offset + lineno], lineno); |
| 1181 | } |
| 1182 | |
| 1183 | static void |
| 1184 | redraw_view_from(struct view *view, int lineno) |
| 1185 | { |
| 1186 | assert(0 <= lineno && lineno < view->height); |
| 1187 | |
| 1188 | for (; lineno < view->height; lineno++) { |
| 1189 | if (!draw_view_line(view, lineno)) |
| 1190 | break; |
| 1191 | } |
| 1192 | |
| 1193 | redrawwin(view->win); |
| 1194 | wrefresh(view->win); |
| 1195 | } |
| 1196 | |
| 1197 | static void |
| 1198 | redraw_view(struct view *view) |
| 1199 | { |
| 1200 | wclear(view->win); |
| 1201 | redraw_view_from(view, 0); |
| 1202 | } |
| 1203 | |
| 1204 | |
| 1205 | static void |
| 1206 | update_view_title(struct view *view) |
| 1207 | { |
| 1208 | if (view == display[current_view]) |
| 1209 | wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS)); |
| 1210 | else |
| 1211 | wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR)); |
| 1212 | |
| 1213 | werase(view->title); |
| 1214 | wmove(view->title, 0, 0); |
| 1215 | |
| 1216 | if (*view->ref) |
| 1217 | wprintw(view->title, "[%s] %s", view->name, view->ref); |
| 1218 | else |
| 1219 | wprintw(view->title, "[%s]", view->name); |
| 1220 | |
| 1221 | if (view->lines || view->pipe) { |
| 1222 | unsigned int view_lines = view->offset + view->height; |
| 1223 | unsigned int lines = view->lines |
| 1224 | ? MIN(view_lines, view->lines) * 100 / view->lines |
| 1225 | : 0; |
| 1226 | |
| 1227 | wprintw(view->title, " - %s %d of %d (%d%%)", |
| 1228 | view->ops->type, |
| 1229 | view->lineno + 1, |
| 1230 | view->lines, |
| 1231 | lines); |
| 1232 | } |
| 1233 | |
| 1234 | if (view->pipe) { |
| 1235 | time_t secs = time(NULL) - view->start_time; |
| 1236 | |
| 1237 | /* Three git seconds are a long time ... */ |
| 1238 | if (secs > 2) |
| 1239 | wprintw(view->title, " %lds", secs); |
| 1240 | } |
| 1241 | |
| 1242 | wmove(view->title, 0, view->width - 1); |
| 1243 | wrefresh(view->title); |
| 1244 | } |
| 1245 | |
| 1246 | static void |
| 1247 | resize_display(void) |
| 1248 | { |
| 1249 | int offset, i; |
| 1250 | struct view *base = display[0]; |
| 1251 | struct view *view = display[1] ? display[1] : display[0]; |
| 1252 | |
| 1253 | /* Setup window dimensions */ |
| 1254 | |
| 1255 | getmaxyx(stdscr, base->height, base->width); |
| 1256 | |
| 1257 | /* Make room for the status window. */ |
| 1258 | base->height -= 1; |
| 1259 | |
| 1260 | if (view != base) { |
| 1261 | /* Horizontal split. */ |
| 1262 | view->width = base->width; |
| 1263 | view->height = SCALE_SPLIT_VIEW(base->height); |
| 1264 | base->height -= view->height; |
| 1265 | |
| 1266 | /* Make room for the title bar. */ |
| 1267 | view->height -= 1; |
| 1268 | } |
| 1269 | |
| 1270 | /* Make room for the title bar. */ |
| 1271 | base->height -= 1; |
| 1272 | |
| 1273 | offset = 0; |
| 1274 | |
| 1275 | foreach_view (view, i) { |
| 1276 | if (!view->win) { |
| 1277 | view->win = newwin(view->height, 0, offset, 0); |
| 1278 | if (!view->win) |
| 1279 | die("Failed to create %s view", view->name); |
| 1280 | |
| 1281 | scrollok(view->win, TRUE); |
| 1282 | |
| 1283 | view->title = newwin(1, 0, offset + view->height, 0); |
| 1284 | if (!view->title) |
| 1285 | die("Failed to create title window"); |
| 1286 | |
| 1287 | } else { |
| 1288 | wresize(view->win, view->height, view->width); |
| 1289 | mvwin(view->win, offset, 0); |
| 1290 | mvwin(view->title, offset + view->height, 0); |
| 1291 | } |
| 1292 | |
| 1293 | offset += view->height + 1; |
| 1294 | } |
| 1295 | } |
| 1296 | |
| 1297 | static void |
| 1298 | redraw_display(void) |
| 1299 | { |
| 1300 | struct view *view; |
| 1301 | int i; |
| 1302 | |
| 1303 | foreach_view (view, i) { |
| 1304 | redraw_view(view); |
| 1305 | update_view_title(view); |
| 1306 | } |
| 1307 | } |
| 1308 | |
| 1309 | static void |
| 1310 | update_display_cursor(void) |
| 1311 | { |
| 1312 | struct view *view = display[current_view]; |
| 1313 | |
| 1314 | /* Move the cursor to the right-most column of the cursor line. |
| 1315 | * |
| 1316 | * XXX: This could turn out to be a bit expensive, but it ensures that |
| 1317 | * the cursor does not jump around. */ |
| 1318 | if (view->lines) { |
| 1319 | wmove(view->win, view->lineno - view->offset, view->width - 1); |
| 1320 | wrefresh(view->win); |
| 1321 | } |
| 1322 | } |
| 1323 | |
| 1324 | /* |
| 1325 | * Navigation |
| 1326 | */ |
| 1327 | |
| 1328 | /* Scrolling backend */ |
| 1329 | static void |
| 1330 | do_scroll_view(struct view *view, int lines, bool redraw) |
| 1331 | { |
| 1332 | /* The rendering expects the new offset. */ |
| 1333 | view->offset += lines; |
| 1334 | |
| 1335 | assert(0 <= view->offset && view->offset < view->lines); |
| 1336 | assert(lines); |
| 1337 | |
| 1338 | /* Redraw the whole screen if scrolling is pointless. */ |
| 1339 | if (view->height < ABS(lines)) { |
| 1340 | redraw_view(view); |
| 1341 | |
| 1342 | } else { |
| 1343 | int line = lines > 0 ? view->height - lines : 0; |
| 1344 | int end = line + ABS(lines); |
| 1345 | |
| 1346 | wscrl(view->win, lines); |
| 1347 | |
| 1348 | for (; line < end; line++) { |
| 1349 | if (!draw_view_line(view, line)) |
| 1350 | break; |
| 1351 | } |
| 1352 | } |
| 1353 | |
| 1354 | /* Move current line into the view. */ |
| 1355 | if (view->lineno < view->offset) { |
| 1356 | view->lineno = view->offset; |
| 1357 | draw_view_line(view, 0); |
| 1358 | |
| 1359 | } else if (view->lineno >= view->offset + view->height) { |
| 1360 | if (view->lineno == view->offset + view->height) { |
| 1361 | /* Clear the hidden line so it doesn't show if the view |
| 1362 | * is scrolled up. */ |
| 1363 | wmove(view->win, view->height, 0); |
| 1364 | wclrtoeol(view->win); |
| 1365 | } |
| 1366 | view->lineno = view->offset + view->height - 1; |
| 1367 | draw_view_line(view, view->lineno - view->offset); |
| 1368 | } |
| 1369 | |
| 1370 | assert(view->offset <= view->lineno && view->lineno < view->lines); |
| 1371 | |
| 1372 | if (!redraw) |
| 1373 | return; |
| 1374 | |
| 1375 | redrawwin(view->win); |
| 1376 | wrefresh(view->win); |
| 1377 | report(""); |
| 1378 | } |
| 1379 | |
| 1380 | /* Scroll frontend */ |
| 1381 | static void |
| 1382 | scroll_view(struct view *view, enum request request) |
| 1383 | { |
| 1384 | int lines = 1; |
| 1385 | |
| 1386 | switch (request) { |
| 1387 | case REQ_SCROLL_PAGE_DOWN: |
| 1388 | lines = view->height; |
| 1389 | case REQ_SCROLL_LINE_DOWN: |
| 1390 | if (view->offset + lines > view->lines) |
| 1391 | lines = view->lines - view->offset; |
| 1392 | |
| 1393 | if (lines == 0 || view->offset + view->height >= view->lines) { |
| 1394 | report("Cannot scroll beyond the last line"); |
| 1395 | return; |
| 1396 | } |
| 1397 | break; |
| 1398 | |
| 1399 | case REQ_SCROLL_PAGE_UP: |
| 1400 | lines = view->height; |
| 1401 | case REQ_SCROLL_LINE_UP: |
| 1402 | if (lines > view->offset) |
| 1403 | lines = view->offset; |
| 1404 | |
| 1405 | if (lines == 0) { |
| 1406 | report("Cannot scroll beyond the first line"); |
| 1407 | return; |
| 1408 | } |
| 1409 | |
| 1410 | lines = -lines; |
| 1411 | break; |
| 1412 | |
| 1413 | default: |
| 1414 | die("request %d not handled in switch", request); |
| 1415 | } |
| 1416 | |
| 1417 | do_scroll_view(view, lines, TRUE); |
| 1418 | } |
| 1419 | |
| 1420 | /* Cursor moving */ |
| 1421 | static void |
| 1422 | move_view(struct view *view, enum request request, bool redraw) |
| 1423 | { |
| 1424 | int steps; |
| 1425 | |
| 1426 | switch (request) { |
| 1427 | case REQ_MOVE_FIRST_LINE: |
| 1428 | steps = -view->lineno; |
| 1429 | break; |
| 1430 | |
| 1431 | case REQ_MOVE_LAST_LINE: |
| 1432 | steps = view->lines - view->lineno - 1; |
| 1433 | break; |
| 1434 | |
| 1435 | case REQ_MOVE_PAGE_UP: |
| 1436 | steps = view->height > view->lineno |
| 1437 | ? -view->lineno : -view->height; |
| 1438 | break; |
| 1439 | |
| 1440 | case REQ_MOVE_PAGE_DOWN: |
| 1441 | steps = view->lineno + view->height >= view->lines |
| 1442 | ? view->lines - view->lineno - 1 : view->height; |
| 1443 | break; |
| 1444 | |
| 1445 | case REQ_MOVE_UP: |
| 1446 | steps = -1; |
| 1447 | break; |
| 1448 | |
| 1449 | case REQ_MOVE_DOWN: |
| 1450 | steps = 1; |
| 1451 | break; |
| 1452 | |
| 1453 | default: |
| 1454 | die("request %d not handled in switch", request); |
| 1455 | } |
| 1456 | |
| 1457 | if (steps <= 0 && view->lineno == 0) { |
| 1458 | report("Cannot move beyond the first line"); |
| 1459 | return; |
| 1460 | |
| 1461 | } else if (steps >= 0 && view->lineno + 1 >= view->lines) { |
| 1462 | report("Cannot move beyond the last line"); |
| 1463 | return; |
| 1464 | } |
| 1465 | |
| 1466 | /* Move the current line */ |
| 1467 | view->lineno += steps; |
| 1468 | assert(0 <= view->lineno && view->lineno < view->lines); |
| 1469 | |
| 1470 | /* Repaint the old "current" line if we be scrolling */ |
| 1471 | if (ABS(steps) < view->height) { |
| 1472 | int prev_lineno = view->lineno - steps - view->offset; |
| 1473 | |
| 1474 | wmove(view->win, prev_lineno, 0); |
| 1475 | wclrtoeol(view->win); |
| 1476 | draw_view_line(view, prev_lineno); |
| 1477 | } |
| 1478 | |
| 1479 | /* Check whether the view needs to be scrolled */ |
| 1480 | if (view->lineno < view->offset || |
| 1481 | view->lineno >= view->offset + view->height) { |
| 1482 | if (steps < 0 && -steps > view->offset) { |
| 1483 | steps = -view->offset; |
| 1484 | |
| 1485 | } else if (steps > 0) { |
| 1486 | if (view->lineno == view->lines - 1 && |
| 1487 | view->lines > view->height) { |
| 1488 | steps = view->lines - view->offset - 1; |
| 1489 | if (steps >= view->height) |
| 1490 | steps -= view->height - 1; |
| 1491 | } |
| 1492 | } |
| 1493 | |
| 1494 | do_scroll_view(view, steps, redraw); |
| 1495 | return; |
| 1496 | } |
| 1497 | |
| 1498 | /* Draw the current line */ |
| 1499 | draw_view_line(view, view->lineno - view->offset); |
| 1500 | |
| 1501 | if (!redraw) |
| 1502 | return; |
| 1503 | |
| 1504 | redrawwin(view->win); |
| 1505 | wrefresh(view->win); |
| 1506 | report(""); |
| 1507 | } |
| 1508 | |
| 1509 | |
| 1510 | /* |
| 1511 | * Incremental updating |
| 1512 | */ |
| 1513 | |
| 1514 | static void |
| 1515 | end_update(struct view *view) |
| 1516 | { |
| 1517 | if (!view->pipe) |
| 1518 | return; |
| 1519 | set_nonblocking_input(FALSE); |
| 1520 | if (view->pipe == stdin) |
| 1521 | fclose(view->pipe); |
| 1522 | else |
| 1523 | pclose(view->pipe); |
| 1524 | view->pipe = NULL; |
| 1525 | } |
| 1526 | |
| 1527 | static bool |
| 1528 | begin_update(struct view *view) |
| 1529 | { |
| 1530 | const char *id = view->id; |
| 1531 | |
| 1532 | if (view->pipe) |
| 1533 | end_update(view); |
| 1534 | |
| 1535 | if (opt_cmd[0]) { |
| 1536 | string_copy(view->cmd, opt_cmd); |
| 1537 | opt_cmd[0] = 0; |
| 1538 | /* When running random commands, the view ref could have become |
| 1539 | * invalid so clear it. */ |
| 1540 | view->ref[0] = 0; |
| 1541 | } else { |
| 1542 | const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt; |
| 1543 | |
| 1544 | if (!string_format(view->cmd, format, id, id, id, id, id)) |
| 1545 | return FALSE; |
| 1546 | } |
| 1547 | |
| 1548 | /* Special case for the pager view. */ |
| 1549 | if (opt_pipe) { |
| 1550 | view->pipe = opt_pipe; |
| 1551 | opt_pipe = NULL; |
| 1552 | } else { |
| 1553 | view->pipe = popen(view->cmd, "r"); |
| 1554 | } |
| 1555 | |
| 1556 | if (!view->pipe) |
| 1557 | return FALSE; |
| 1558 | |
| 1559 | set_nonblocking_input(TRUE); |
| 1560 | |
| 1561 | view->offset = 0; |
| 1562 | view->lines = 0; |
| 1563 | view->lineno = 0; |
| 1564 | string_copy(view->vid, id); |
| 1565 | |
| 1566 | if (view->line) { |
| 1567 | int i; |
| 1568 | |
| 1569 | for (i = 0; i < view->lines; i++) |
| 1570 | if (view->line[i].data) |
| 1571 | free(view->line[i].data); |
| 1572 | |
| 1573 | free(view->line); |
| 1574 | view->line = NULL; |
| 1575 | } |
| 1576 | |
| 1577 | view->start_time = time(NULL); |
| 1578 | |
| 1579 | return TRUE; |
| 1580 | } |
| 1581 | |
| 1582 | static struct line * |
| 1583 | realloc_lines(struct view *view, size_t line_size) |
| 1584 | { |
| 1585 | struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size); |
| 1586 | |
| 1587 | if (!tmp) |
| 1588 | return NULL; |
| 1589 | |
| 1590 | view->line = tmp; |
| 1591 | view->line_size = line_size; |
| 1592 | return view->line; |
| 1593 | } |
| 1594 | |
| 1595 | static bool |
| 1596 | update_view(struct view *view) |
| 1597 | { |
| 1598 | char buffer[BUFSIZ]; |
| 1599 | char *line; |
| 1600 | /* The number of lines to read. If too low it will cause too much |
| 1601 | * redrawing (and possible flickering), if too high responsiveness |
| 1602 | * will suffer. */ |
| 1603 | unsigned long lines = view->height; |
| 1604 | int redraw_from = -1; |
| 1605 | |
| 1606 | if (!view->pipe) |
| 1607 | return TRUE; |
| 1608 | |
| 1609 | /* Only redraw if lines are visible. */ |
| 1610 | if (view->offset + view->height >= view->lines) |
| 1611 | redraw_from = view->lines - view->offset; |
| 1612 | |
| 1613 | if (!realloc_lines(view, view->lines + lines)) |
| 1614 | goto alloc_error; |
| 1615 | |
| 1616 | while ((line = fgets(buffer, sizeof(buffer), view->pipe))) { |
| 1617 | int linelen = strlen(line); |
| 1618 | |
| 1619 | if (linelen) |
| 1620 | line[linelen - 1] = 0; |
| 1621 | |
| 1622 | if (!view->ops->read(view, line)) |
| 1623 | goto alloc_error; |
| 1624 | |
| 1625 | if (lines-- == 1) |
| 1626 | break; |
| 1627 | } |
| 1628 | |
| 1629 | { |
| 1630 | int digits; |
| 1631 | |
| 1632 | lines = view->lines; |
| 1633 | for (digits = 0; lines; digits++) |
| 1634 | lines /= 10; |
| 1635 | |
| 1636 | /* Keep the displayed view in sync with line number scaling. */ |
| 1637 | if (digits != view->digits) { |
| 1638 | view->digits = digits; |
| 1639 | redraw_from = 0; |
| 1640 | } |
| 1641 | } |
| 1642 | |
| 1643 | if (redraw_from >= 0) { |
| 1644 | /* If this is an incremental update, redraw the previous line |
| 1645 | * since for commits some members could have changed when |
| 1646 | * loading the main view. */ |
| 1647 | if (redraw_from > 0) |
| 1648 | redraw_from--; |
| 1649 | |
| 1650 | /* Incrementally draw avoids flickering. */ |
| 1651 | redraw_view_from(view, redraw_from); |
| 1652 | } |
| 1653 | |
| 1654 | /* Update the title _after_ the redraw so that if the redraw picks up a |
| 1655 | * commit reference in view->ref it'll be available here. */ |
| 1656 | update_view_title(view); |
| 1657 | |
| 1658 | if (ferror(view->pipe)) { |
| 1659 | report("Failed to read: %s", strerror(errno)); |
| 1660 | goto end; |
| 1661 | |
| 1662 | } else if (feof(view->pipe)) { |
| 1663 | report(""); |
| 1664 | goto end; |
| 1665 | } |
| 1666 | |
| 1667 | return TRUE; |
| 1668 | |
| 1669 | alloc_error: |
| 1670 | report("Allocation failure"); |
| 1671 | |
| 1672 | end: |
| 1673 | end_update(view); |
| 1674 | return FALSE; |
| 1675 | } |
| 1676 | |
| 1677 | |
| 1678 | /* |
| 1679 | * View opening |
| 1680 | */ |
| 1681 | |
| 1682 | static void open_help_view(struct view *view) |
| 1683 | { |
| 1684 | char buf[BUFSIZ]; |
| 1685 | int lines = ARRAY_SIZE(req_info) + 2; |
| 1686 | int i; |
| 1687 | |
| 1688 | if (view->lines > 0) |
| 1689 | return; |
| 1690 | |
| 1691 | for (i = 0; i < ARRAY_SIZE(req_info); i++) |
| 1692 | if (!req_info[i].request) |
| 1693 | lines++; |
| 1694 | |
| 1695 | view->line = calloc(lines, sizeof(*view->line)); |
| 1696 | if (!view->line) { |
| 1697 | report("Allocation failure"); |
| 1698 | return; |
| 1699 | } |
| 1700 | |
| 1701 | view->ops->read(view, "Quick reference for tig keybindings:"); |
| 1702 | |
| 1703 | for (i = 0; i < ARRAY_SIZE(req_info); i++) { |
| 1704 | char *key; |
| 1705 | |
| 1706 | if (!req_info[i].request) { |
| 1707 | view->ops->read(view, ""); |
| 1708 | view->ops->read(view, req_info[i].help); |
| 1709 | continue; |
| 1710 | } |
| 1711 | |
| 1712 | key = get_key(req_info[i].request); |
| 1713 | if (!string_format(buf, "%-25s %s", key, req_info[i].help)) |
| 1714 | continue; |
| 1715 | |
| 1716 | view->ops->read(view, buf); |
| 1717 | } |
| 1718 | } |
| 1719 | |
| 1720 | enum open_flags { |
| 1721 | OPEN_DEFAULT = 0, /* Use default view switching. */ |
| 1722 | OPEN_SPLIT = 1, /* Split current view. */ |
| 1723 | OPEN_BACKGROUNDED = 2, /* Backgrounded. */ |
| 1724 | OPEN_RELOAD = 4, /* Reload view even if it is the current. */ |
| 1725 | }; |
| 1726 | |
| 1727 | static void |
| 1728 | open_view(struct view *prev, enum request request, enum open_flags flags) |
| 1729 | { |
| 1730 | bool backgrounded = !!(flags & OPEN_BACKGROUNDED); |
| 1731 | bool split = !!(flags & OPEN_SPLIT); |
| 1732 | bool reload = !!(flags & OPEN_RELOAD); |
| 1733 | struct view *view = VIEW(request); |
| 1734 | int nviews = displayed_views(); |
| 1735 | struct view *base_view = display[0]; |
| 1736 | |
| 1737 | if (view == prev && nviews == 1 && !reload) { |
| 1738 | report("Already in %s view", view->name); |
| 1739 | return; |
| 1740 | } |
| 1741 | |
| 1742 | if (view == VIEW(REQ_VIEW_HELP)) { |
| 1743 | open_help_view(view); |
| 1744 | |
| 1745 | } else if ((reload || strcmp(view->vid, view->id)) && |
| 1746 | !begin_update(view)) { |
| 1747 | report("Failed to load %s view", view->name); |
| 1748 | return; |
| 1749 | } |
| 1750 | |
| 1751 | if (split) { |
| 1752 | display[1] = view; |
| 1753 | if (!backgrounded) |
| 1754 | current_view = 1; |
| 1755 | } else { |
| 1756 | /* Maximize the current view. */ |
| 1757 | memset(display, 0, sizeof(display)); |
| 1758 | current_view = 0; |
| 1759 | display[current_view] = view; |
| 1760 | } |
| 1761 | |
| 1762 | /* Resize the view when switching between split- and full-screen, |
| 1763 | * or when switching between two different full-screen views. */ |
| 1764 | if (nviews != displayed_views() || |
| 1765 | (nviews == 1 && base_view != display[0])) |
| 1766 | resize_display(); |
| 1767 | |
| 1768 | if (split && prev->lineno - prev->offset >= prev->height) { |
| 1769 | /* Take the title line into account. */ |
| 1770 | int lines = prev->lineno - prev->offset - prev->height + 1; |
| 1771 | |
| 1772 | /* Scroll the view that was split if the current line is |
| 1773 | * outside the new limited view. */ |
| 1774 | do_scroll_view(prev, lines, TRUE); |
| 1775 | } |
| 1776 | |
| 1777 | if (prev && view != prev) { |
| 1778 | if (split && !backgrounded) { |
| 1779 | /* "Blur" the previous view. */ |
| 1780 | update_view_title(prev); |
| 1781 | } |
| 1782 | |
| 1783 | view->parent = prev; |
| 1784 | } |
| 1785 | |
| 1786 | if (view->pipe && view->lines == 0) { |
| 1787 | /* Clear the old view and let the incremental updating refill |
| 1788 | * the screen. */ |
| 1789 | wclear(view->win); |
| 1790 | report(""); |
| 1791 | } else { |
| 1792 | redraw_view(view); |
| 1793 | report(""); |
| 1794 | } |
| 1795 | |
| 1796 | /* If the view is backgrounded the above calls to report() |
| 1797 | * won't redraw the view title. */ |
| 1798 | if (backgrounded) |
| 1799 | update_view_title(view); |
| 1800 | } |
| 1801 | |
| 1802 | |
| 1803 | /* |
| 1804 | * User request switch noodle |
| 1805 | */ |
| 1806 | |
| 1807 | static int |
| 1808 | view_driver(struct view *view, enum request request) |
| 1809 | { |
| 1810 | int i; |
| 1811 | |
| 1812 | switch (request) { |
| 1813 | case REQ_MOVE_UP: |
| 1814 | case REQ_MOVE_DOWN: |
| 1815 | case REQ_MOVE_PAGE_UP: |
| 1816 | case REQ_MOVE_PAGE_DOWN: |
| 1817 | case REQ_MOVE_FIRST_LINE: |
| 1818 | case REQ_MOVE_LAST_LINE: |
| 1819 | move_view(view, request, TRUE); |
| 1820 | break; |
| 1821 | |
| 1822 | case REQ_SCROLL_LINE_DOWN: |
| 1823 | case REQ_SCROLL_LINE_UP: |
| 1824 | case REQ_SCROLL_PAGE_DOWN: |
| 1825 | case REQ_SCROLL_PAGE_UP: |
| 1826 | scroll_view(view, request); |
| 1827 | break; |
| 1828 | |
| 1829 | case REQ_VIEW_MAIN: |
| 1830 | case REQ_VIEW_DIFF: |
| 1831 | case REQ_VIEW_LOG: |
| 1832 | case REQ_VIEW_HELP: |
| 1833 | case REQ_VIEW_PAGER: |
| 1834 | open_view(view, request, OPEN_DEFAULT); |
| 1835 | break; |
| 1836 | |
| 1837 | case REQ_NEXT: |
| 1838 | case REQ_PREVIOUS: |
| 1839 | request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP; |
| 1840 | |
| 1841 | if (view == VIEW(REQ_VIEW_DIFF) && |
| 1842 | view->parent == VIEW(REQ_VIEW_MAIN)) { |
| 1843 | bool redraw = display[1] == view; |
| 1844 | |
| 1845 | view = view->parent; |
| 1846 | move_view(view, request, redraw); |
| 1847 | if (redraw) |
| 1848 | update_view_title(view); |
| 1849 | } else { |
| 1850 | move_view(view, request, TRUE); |
| 1851 | break; |
| 1852 | } |
| 1853 | /* Fall-through */ |
| 1854 | |
| 1855 | case REQ_ENTER: |
| 1856 | if (!view->lines) { |
| 1857 | report("Nothing to enter"); |
| 1858 | break; |
| 1859 | } |
| 1860 | return view->ops->enter(view, &view->line[view->lineno]); |
| 1861 | |
| 1862 | case REQ_VIEW_NEXT: |
| 1863 | { |
| 1864 | int nviews = displayed_views(); |
| 1865 | int next_view = (current_view + 1) % nviews; |
| 1866 | |
| 1867 | if (next_view == current_view) { |
| 1868 | report("Only one view is displayed"); |
| 1869 | break; |
| 1870 | } |
| 1871 | |
| 1872 | current_view = next_view; |
| 1873 | /* Blur out the title of the previous view. */ |
| 1874 | update_view_title(view); |
| 1875 | report(""); |
| 1876 | break; |
| 1877 | } |
| 1878 | case REQ_TOGGLE_LINENO: |
| 1879 | opt_line_number = !opt_line_number; |
| 1880 | redraw_display(); |
| 1881 | break; |
| 1882 | |
| 1883 | case REQ_TOGGLE_REV_GRAPH: |
| 1884 | opt_rev_graph = !opt_rev_graph; |
| 1885 | redraw_display(); |
| 1886 | break; |
| 1887 | |
| 1888 | case REQ_PROMPT: |
| 1889 | /* Always reload^Wrerun commands from the prompt. */ |
| 1890 | open_view(view, opt_request, OPEN_RELOAD); |
| 1891 | break; |
| 1892 | |
| 1893 | case REQ_STOP_LOADING: |
| 1894 | for (i = 0; i < ARRAY_SIZE(views); i++) { |
| 1895 | view = &views[i]; |
| 1896 | if (view->pipe) |
| 1897 | report("Stopped loading the %s view", view->name), |
| 1898 | end_update(view); |
| 1899 | } |
| 1900 | break; |
| 1901 | |
| 1902 | case REQ_SHOW_VERSION: |
| 1903 | report("%s (built %s)", VERSION, __DATE__); |
| 1904 | return TRUE; |
| 1905 | |
| 1906 | case REQ_SCREEN_RESIZE: |
| 1907 | resize_display(); |
| 1908 | /* Fall-through */ |
| 1909 | case REQ_SCREEN_REDRAW: |
| 1910 | redraw_display(); |
| 1911 | break; |
| 1912 | |
| 1913 | case REQ_SCREEN_UPDATE: |
| 1914 | doupdate(); |
| 1915 | return TRUE; |
| 1916 | |
| 1917 | case REQ_VIEW_CLOSE: |
| 1918 | /* XXX: Mark closed views by letting view->parent point to the |
| 1919 | * view itself. Parents to closed view should never be |
| 1920 | * followed. */ |
| 1921 | if (view->parent && |
| 1922 | view->parent->parent != view->parent) { |
| 1923 | memset(display, 0, sizeof(display)); |
| 1924 | current_view = 0; |
| 1925 | display[current_view] = view->parent; |
| 1926 | view->parent = view; |
| 1927 | resize_display(); |
| 1928 | redraw_display(); |
| 1929 | break; |
| 1930 | } |
| 1931 | /* Fall-through */ |
| 1932 | case REQ_QUIT: |
| 1933 | return FALSE; |
| 1934 | |
| 1935 | default: |
| 1936 | /* An unknown key will show most commonly used commands. */ |
| 1937 | report("Unknown key, press 'h' for help"); |
| 1938 | return TRUE; |
| 1939 | } |
| 1940 | |
| 1941 | return TRUE; |
| 1942 | } |
| 1943 | |
| 1944 | |
| 1945 | /* |
| 1946 | * Pager backend |
| 1947 | */ |
| 1948 | |
| 1949 | static bool |
| 1950 | pager_draw(struct view *view, struct line *line, unsigned int lineno) |
| 1951 | { |
| 1952 | char *text = line->data; |
| 1953 | enum line_type type = line->type; |
| 1954 | int textlen = strlen(text); |
| 1955 | int attr; |
| 1956 | |
| 1957 | wmove(view->win, lineno, 0); |
| 1958 | |
| 1959 | if (view->offset + lineno == view->lineno) { |
| 1960 | if (type == LINE_COMMIT) { |
| 1961 | string_copy(view->ref, text + 7); |
| 1962 | string_copy(ref_commit, view->ref); |
| 1963 | } |
| 1964 | |
| 1965 | type = LINE_CURSOR; |
| 1966 | wchgat(view->win, -1, 0, type, NULL); |
| 1967 | } |
| 1968 | |
| 1969 | attr = get_line_attr(type); |
| 1970 | wattrset(view->win, attr); |
| 1971 | |
| 1972 | if (opt_line_number || opt_tab_size < TABSIZE) { |
| 1973 | static char spaces[] = " "; |
| 1974 | int col_offset = 0, col = 0; |
| 1975 | |
| 1976 | if (opt_line_number) { |
| 1977 | unsigned long real_lineno = view->offset + lineno + 1; |
| 1978 | |
| 1979 | if (real_lineno == 1 || |
| 1980 | (real_lineno % opt_num_interval) == 0) { |
| 1981 | wprintw(view->win, "%.*d", view->digits, real_lineno); |
| 1982 | |
| 1983 | } else { |
| 1984 | waddnstr(view->win, spaces, |
| 1985 | MIN(view->digits, STRING_SIZE(spaces))); |
| 1986 | } |
| 1987 | waddstr(view->win, ": "); |
| 1988 | col_offset = view->digits + 2; |
| 1989 | } |
| 1990 | |
| 1991 | while (text && col_offset + col < view->width) { |
| 1992 | int cols_max = view->width - col_offset - col; |
| 1993 | char *pos = text; |
| 1994 | int cols; |
| 1995 | |
| 1996 | if (*text == '\t') { |
| 1997 | text++; |
| 1998 | assert(sizeof(spaces) > TABSIZE); |
| 1999 | pos = spaces; |
| 2000 | cols = opt_tab_size - (col % opt_tab_size); |
| 2001 | |
| 2002 | } else { |
| 2003 | text = strchr(text, '\t'); |
| 2004 | cols = line ? text - pos : strlen(pos); |
| 2005 | } |
| 2006 | |
| 2007 | waddnstr(view->win, pos, MIN(cols, cols_max)); |
| 2008 | col += cols; |
| 2009 | } |
| 2010 | |
| 2011 | } else { |
| 2012 | int col = 0, pos = 0; |
| 2013 | |
| 2014 | for (; pos < textlen && col < view->width; pos++, col++) |
| 2015 | if (text[pos] == '\t') |
| 2016 | col += TABSIZE - (col % TABSIZE) - 1; |
| 2017 | |
| 2018 | waddnstr(view->win, text, pos); |
| 2019 | } |
| 2020 | |
| 2021 | return TRUE; |
| 2022 | } |
| 2023 | |
| 2024 | static void |
| 2025 | add_pager_refs(struct view *view, struct line *line) |
| 2026 | { |
| 2027 | char buf[1024]; |
| 2028 | char *data = line->data; |
| 2029 | struct ref **refs; |
| 2030 | int bufpos = 0, refpos = 0; |
| 2031 | const char *sep = "Refs: "; |
| 2032 | |
| 2033 | assert(line->type == LINE_COMMIT); |
| 2034 | |
| 2035 | refs = get_refs(data + STRING_SIZE("commit ")); |
| 2036 | if (!refs) |
| 2037 | return; |
| 2038 | |
| 2039 | do { |
| 2040 | struct ref *ref = refs[refpos]; |
| 2041 | char *fmt = ref->tag ? "%s[%s]" : "%s%s"; |
| 2042 | |
| 2043 | if (!string_format_from(buf, &bufpos, fmt, sep, ref->name)) |
| 2044 | return; |
| 2045 | sep = ", "; |
| 2046 | } while (refs[refpos++]->next); |
| 2047 | |
| 2048 | if (!realloc_lines(view, view->line_size + 1)) |
| 2049 | return; |
| 2050 | |
| 2051 | line = &view->line[view->lines]; |
| 2052 | line->data = strdup(buf); |
| 2053 | if (!line->data) |
| 2054 | return; |
| 2055 | |
| 2056 | line->type = LINE_PP_REFS; |
| 2057 | view->lines++; |
| 2058 | } |
| 2059 | |
| 2060 | static bool |
| 2061 | pager_read(struct view *view, char *data) |
| 2062 | { |
| 2063 | struct line *line = &view->line[view->lines]; |
| 2064 | |
| 2065 | line->data = strdup(data); |
| 2066 | if (!line->data) |
| 2067 | return FALSE; |
| 2068 | |
| 2069 | line->type = get_line_type(line->data); |
| 2070 | view->lines++; |
| 2071 | |
| 2072 | if (line->type == LINE_COMMIT && |
| 2073 | (view == VIEW(REQ_VIEW_DIFF) || |
| 2074 | view == VIEW(REQ_VIEW_LOG))) |
| 2075 | add_pager_refs(view, line); |
| 2076 | |
| 2077 | return TRUE; |
| 2078 | } |
| 2079 | |
| 2080 | static bool |
| 2081 | pager_enter(struct view *view, struct line *line) |
| 2082 | { |
| 2083 | int split = 0; |
| 2084 | |
| 2085 | if (line->type == LINE_COMMIT && |
| 2086 | (view == VIEW(REQ_VIEW_LOG) || |
| 2087 | view == VIEW(REQ_VIEW_PAGER))) { |
| 2088 | open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT); |
| 2089 | split = 1; |
| 2090 | } |
| 2091 | |
| 2092 | /* Always scroll the view even if it was split. That way |
| 2093 | * you can use Enter to scroll through the log view and |
| 2094 | * split open each commit diff. */ |
| 2095 | scroll_view(view, REQ_SCROLL_LINE_DOWN); |
| 2096 | |
| 2097 | /* FIXME: A minor workaround. Scrolling the view will call report("") |
| 2098 | * but if we are scrolling a non-current view this won't properly |
| 2099 | * update the view title. */ |
| 2100 | if (split) |
| 2101 | update_view_title(view); |
| 2102 | |
| 2103 | return TRUE; |
| 2104 | } |
| 2105 | |
| 2106 | static struct view_ops pager_ops = { |
| 2107 | "line", |
| 2108 | pager_draw, |
| 2109 | pager_read, |
| 2110 | pager_enter, |
| 2111 | }; |
| 2112 | |
| 2113 | |
| 2114 | /* |
| 2115 | * Main view backend |
| 2116 | */ |
| 2117 | |
| 2118 | struct commit { |
| 2119 | char id[41]; /* SHA1 ID. */ |
| 2120 | char title[75]; /* First line of the commit message. */ |
| 2121 | char author[75]; /* Author of the commit. */ |
| 2122 | struct tm time; /* Date from the author ident. */ |
| 2123 | struct ref **refs; /* Repository references. */ |
| 2124 | chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */ |
| 2125 | size_t graph_size; /* The width of the graph array. */ |
| 2126 | }; |
| 2127 | |
| 2128 | static bool |
| 2129 | main_draw(struct view *view, struct line *line, unsigned int lineno) |
| 2130 | { |
| 2131 | char buf[DATE_COLS + 1]; |
| 2132 | struct commit *commit = line->data; |
| 2133 | enum line_type type; |
| 2134 | int col = 0; |
| 2135 | size_t timelen; |
| 2136 | size_t authorlen; |
| 2137 | int trimmed = 1; |
| 2138 | |
| 2139 | if (!*commit->author) |
| 2140 | return FALSE; |
| 2141 | |
| 2142 | wmove(view->win, lineno, col); |
| 2143 | |
| 2144 | if (view->offset + lineno == view->lineno) { |
| 2145 | string_copy(view->ref, commit->id); |
| 2146 | string_copy(ref_commit, view->ref); |
| 2147 | type = LINE_CURSOR; |
| 2148 | wattrset(view->win, get_line_attr(type)); |
| 2149 | wchgat(view->win, -1, 0, type, NULL); |
| 2150 | |
| 2151 | } else { |
| 2152 | type = LINE_MAIN_COMMIT; |
| 2153 | wattrset(view->win, get_line_attr(LINE_MAIN_DATE)); |
| 2154 | } |
| 2155 | |
| 2156 | timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time); |
| 2157 | waddnstr(view->win, buf, timelen); |
| 2158 | waddstr(view->win, " "); |
| 2159 | |
| 2160 | col += DATE_COLS; |
| 2161 | wmove(view->win, lineno, col); |
| 2162 | if (type != LINE_CURSOR) |
| 2163 | wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR)); |
| 2164 | |
| 2165 | if (opt_utf8) { |
| 2166 | authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed); |
| 2167 | } else { |
| 2168 | authorlen = strlen(commit->author); |
| 2169 | if (authorlen > AUTHOR_COLS - 2) { |
| 2170 | authorlen = AUTHOR_COLS - 2; |
| 2171 | trimmed = 1; |
| 2172 | } |
| 2173 | } |
| 2174 | |
| 2175 | if (trimmed) { |
| 2176 | waddnstr(view->win, commit->author, authorlen); |
| 2177 | if (type != LINE_CURSOR) |
| 2178 | wattrset(view->win, get_line_attr(LINE_MAIN_DELIM)); |
| 2179 | waddch(view->win, '~'); |
| 2180 | } else { |
| 2181 | waddstr(view->win, commit->author); |
| 2182 | } |
| 2183 | |
| 2184 | col += AUTHOR_COLS; |
| 2185 | if (type != LINE_CURSOR) |
| 2186 | wattrset(view->win, A_NORMAL); |
| 2187 | |
| 2188 | if (opt_rev_graph && commit->graph_size) { |
| 2189 | size_t i; |
| 2190 | |
| 2191 | wmove(view->win, lineno, col); |
| 2192 | /* Using waddch() instead of waddnstr() ensures that |
| 2193 | * they'll be rendered correctly for the cursor line. */ |
| 2194 | for (i = 0; i < commit->graph_size; i++) |
| 2195 | waddch(view->win, commit->graph[i]); |
| 2196 | |
| 2197 | col += commit->graph_size + 1; |
| 2198 | } |
| 2199 | |
| 2200 | wmove(view->win, lineno, col); |
| 2201 | |
| 2202 | if (commit->refs) { |
| 2203 | size_t i = 0; |
| 2204 | |
| 2205 | do { |
| 2206 | if (type == LINE_CURSOR) |
| 2207 | ; |
| 2208 | else if (commit->refs[i]->tag) |
| 2209 | wattrset(view->win, get_line_attr(LINE_MAIN_TAG)); |
| 2210 | else |
| 2211 | wattrset(view->win, get_line_attr(LINE_MAIN_REF)); |
| 2212 | waddstr(view->win, "["); |
| 2213 | waddstr(view->win, commit->refs[i]->name); |
| 2214 | waddstr(view->win, "]"); |
| 2215 | if (type != LINE_CURSOR) |
| 2216 | wattrset(view->win, A_NORMAL); |
| 2217 | waddstr(view->win, " "); |
| 2218 | col += strlen(commit->refs[i]->name) + STRING_SIZE("[] "); |
| 2219 | } while (commit->refs[i++]->next); |
| 2220 | } |
| 2221 | |
| 2222 | if (type != LINE_CURSOR) |
| 2223 | wattrset(view->win, get_line_attr(type)); |
| 2224 | |
| 2225 | { |
| 2226 | int titlelen = strlen(commit->title); |
| 2227 | |
| 2228 | if (col + titlelen > view->width) |
| 2229 | titlelen = view->width - col; |
| 2230 | |
| 2231 | waddnstr(view->win, commit->title, titlelen); |
| 2232 | } |
| 2233 | |
| 2234 | return TRUE; |
| 2235 | } |
| 2236 | |
| 2237 | /* Reads git log --pretty=raw output and parses it into the commit struct. */ |
| 2238 | static bool |
| 2239 | main_read(struct view *view, char *line) |
| 2240 | { |
| 2241 | enum line_type type = get_line_type(line); |
| 2242 | struct commit *commit = view->lines |
| 2243 | ? view->line[view->lines - 1].data : NULL; |
| 2244 | |
| 2245 | switch (type) { |
| 2246 | case LINE_COMMIT: |
| 2247 | commit = calloc(1, sizeof(struct commit)); |
| 2248 | if (!commit) |
| 2249 | return FALSE; |
| 2250 | |
| 2251 | line += STRING_SIZE("commit "); |
| 2252 | |
| 2253 | view->line[view->lines++].data = commit; |
| 2254 | string_copy(commit->id, line); |
| 2255 | commit->refs = get_refs(commit->id); |
| 2256 | commit->graph[commit->graph_size++] = ACS_LTEE; |
| 2257 | break; |
| 2258 | |
| 2259 | case LINE_AUTHOR: |
| 2260 | { |
| 2261 | char *ident = line + STRING_SIZE("author "); |
| 2262 | char *end = strchr(ident, '<'); |
| 2263 | |
| 2264 | if (!commit) |
| 2265 | break; |
| 2266 | |
| 2267 | if (end) { |
| 2268 | for (; end > ident && isspace(end[-1]); end--) ; |
| 2269 | *end = 0; |
| 2270 | } |
| 2271 | |
| 2272 | string_copy(commit->author, ident); |
| 2273 | |
| 2274 | /* Parse epoch and timezone */ |
| 2275 | if (end) { |
| 2276 | char *secs = strchr(end + 1, '>'); |
| 2277 | char *zone; |
| 2278 | time_t time; |
| 2279 | |
| 2280 | if (!secs || secs[1] != ' ') |
| 2281 | break; |
| 2282 | |
| 2283 | secs += 2; |
| 2284 | time = (time_t) atol(secs); |
| 2285 | zone = strchr(secs, ' '); |
| 2286 | if (zone && strlen(zone) == STRING_SIZE(" +0700")) { |
| 2287 | long tz; |
| 2288 | |
| 2289 | zone++; |
| 2290 | tz = ('0' - zone[1]) * 60 * 60 * 10; |
| 2291 | tz += ('0' - zone[2]) * 60 * 60; |
| 2292 | tz += ('0' - zone[3]) * 60; |
| 2293 | tz += ('0' - zone[4]) * 60; |
| 2294 | |
| 2295 | if (zone[0] == '-') |
| 2296 | tz = -tz; |
| 2297 | |
| 2298 | time -= tz; |
| 2299 | } |
| 2300 | gmtime_r(&time, &commit->time); |
| 2301 | } |
| 2302 | break; |
| 2303 | } |
| 2304 | default: |
| 2305 | if (!commit) |
| 2306 | break; |
| 2307 | |
| 2308 | /* Fill in the commit title if it has not already been set. */ |
| 2309 | if (commit->title[0]) |
| 2310 | break; |
| 2311 | |
| 2312 | /* Require titles to start with a non-space character at the |
| 2313 | * offset used by git log. */ |
| 2314 | /* FIXME: More gracefull handling of titles; append "..." to |
| 2315 | * shortened titles, etc. */ |
| 2316 | if (strncmp(line, " ", 4) || |
| 2317 | isspace(line[4])) |
| 2318 | break; |
| 2319 | |
| 2320 | string_copy(commit->title, line + 4); |
| 2321 | } |
| 2322 | |
| 2323 | return TRUE; |
| 2324 | } |
| 2325 | |
| 2326 | static bool |
| 2327 | main_enter(struct view *view, struct line *line) |
| 2328 | { |
| 2329 | enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT; |
| 2330 | |
| 2331 | open_view(view, REQ_VIEW_DIFF, flags); |
| 2332 | return TRUE; |
| 2333 | } |
| 2334 | |
| 2335 | static struct view_ops main_ops = { |
| 2336 | "commit", |
| 2337 | main_draw, |
| 2338 | main_read, |
| 2339 | main_enter, |
| 2340 | }; |
| 2341 | |
| 2342 | |
| 2343 | /* |
| 2344 | * Unicode / UTF-8 handling |
| 2345 | * |
| 2346 | * NOTE: Much of the following code for dealing with unicode is derived from |
| 2347 | * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is |
| 2348 | * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28. |
| 2349 | */ |
| 2350 | |
| 2351 | /* I've (over)annotated a lot of code snippets because I am not entirely |
| 2352 | * confident that the approach taken by this small UTF-8 interface is correct. |
| 2353 | * --jonas */ |
| 2354 | |
| 2355 | static inline int |
| 2356 | unicode_width(unsigned long c) |
| 2357 | { |
| 2358 | if (c >= 0x1100 && |
| 2359 | (c <= 0x115f /* Hangul Jamo */ |
| 2360 | || c == 0x2329 |
| 2361 | || c == 0x232a |
| 2362 | || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f) |
| 2363 | /* CJK ... Yi */ |
| 2364 | || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */ |
| 2365 | || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */ |
| 2366 | || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */ |
| 2367 | || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */ |
| 2368 | || (c >= 0xffe0 && c <= 0xffe6) |
| 2369 | || (c >= 0x20000 && c <= 0x2fffd) |
| 2370 | || (c >= 0x30000 && c <= 0x3fffd))) |
| 2371 | return 2; |
| 2372 | |
| 2373 | return 1; |
| 2374 | } |
| 2375 | |
| 2376 | /* Number of bytes used for encoding a UTF-8 character indexed by first byte. |
| 2377 | * Illegal bytes are set one. */ |
| 2378 | static const unsigned char utf8_bytes[256] = { |
| 2379 | 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, |
| 2380 | 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, |
| 2381 | 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, |
| 2382 | 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, |
| 2383 | 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, |
| 2384 | 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, |
| 2385 | 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, |
| 2386 | 3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4, 5,5,5,5,6,6,1,1, |
| 2387 | }; |
| 2388 | |
| 2389 | /* Decode UTF-8 multi-byte representation into a unicode character. */ |
| 2390 | static inline unsigned long |
| 2391 | utf8_to_unicode(const char *string, size_t length) |
| 2392 | { |
| 2393 | unsigned long unicode; |
| 2394 | |
| 2395 | switch (length) { |
| 2396 | case 1: |
| 2397 | unicode = string[0]; |
| 2398 | break; |
| 2399 | case 2: |
| 2400 | unicode = (string[0] & 0x1f) << 6; |
| 2401 | unicode += (string[1] & 0x3f); |
| 2402 | break; |
| 2403 | case 3: |
| 2404 | unicode = (string[0] & 0x0f) << 12; |
| 2405 | unicode += ((string[1] & 0x3f) << 6); |
| 2406 | unicode += (string[2] & 0x3f); |
| 2407 | break; |
| 2408 | case 4: |
| 2409 | unicode = (string[0] & 0x0f) << 18; |
| 2410 | unicode += ((string[1] & 0x3f) << 12); |
| 2411 | unicode += ((string[2] & 0x3f) << 6); |
| 2412 | unicode += (string[3] & 0x3f); |
| 2413 | break; |
| 2414 | case 5: |
| 2415 | unicode = (string[0] & 0x0f) << 24; |
| 2416 | unicode += ((string[1] & 0x3f) << 18); |
| 2417 | unicode += ((string[2] & 0x3f) << 12); |
| 2418 | unicode += ((string[3] & 0x3f) << 6); |
| 2419 | unicode += (string[4] & 0x3f); |
| 2420 | break; |
| 2421 | case 6: |
| 2422 | unicode = (string[0] & 0x01) << 30; |
| 2423 | unicode += ((string[1] & 0x3f) << 24); |
| 2424 | unicode += ((string[2] & 0x3f) << 18); |
| 2425 | unicode += ((string[3] & 0x3f) << 12); |
| 2426 | unicode += ((string[4] & 0x3f) << 6); |
| 2427 | unicode += (string[5] & 0x3f); |
| 2428 | break; |
| 2429 | default: |
| 2430 | die("Invalid unicode length"); |
| 2431 | } |
| 2432 | |
| 2433 | /* Invalid characters could return the special 0xfffd value but NUL |
| 2434 | * should be just as good. */ |
| 2435 | return unicode > 0xffff ? 0 : unicode; |
| 2436 | } |
| 2437 | |
| 2438 | /* Calculates how much of string can be shown within the given maximum width |
| 2439 | * and sets trimmed parameter to non-zero value if all of string could not be |
| 2440 | * shown. |
| 2441 | * |
| 2442 | * Additionally, adds to coloffset how many many columns to move to align with |
| 2443 | * the expected position. Takes into account how multi-byte and double-width |
| 2444 | * characters will effect the cursor position. |
| 2445 | * |
| 2446 | * Returns the number of bytes to output from string to satisfy max_width. */ |
| 2447 | static size_t |
| 2448 | utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed) |
| 2449 | { |
| 2450 | const char *start = string; |
| 2451 | const char *end = strchr(string, '\0'); |
| 2452 | size_t mbwidth = 0; |
| 2453 | size_t width = 0; |
| 2454 | |
| 2455 | *trimmed = 0; |
| 2456 | |
| 2457 | while (string < end) { |
| 2458 | int c = *(unsigned char *) string; |
| 2459 | unsigned char bytes = utf8_bytes[c]; |
| 2460 | size_t ucwidth; |
| 2461 | unsigned long unicode; |
| 2462 | |
| 2463 | if (string + bytes > end) |
| 2464 | break; |
| 2465 | |
| 2466 | /* Change representation to figure out whether |
| 2467 | * it is a single- or double-width character. */ |
| 2468 | |
| 2469 | unicode = utf8_to_unicode(string, bytes); |
| 2470 | /* FIXME: Graceful handling of invalid unicode character. */ |
| 2471 | if (!unicode) |
| 2472 | break; |
| 2473 | |
| 2474 | ucwidth = unicode_width(unicode); |
| 2475 | width += ucwidth; |
| 2476 | if (width > max_width) { |
| 2477 | *trimmed = 1; |
| 2478 | break; |
| 2479 | } |
| 2480 | |
| 2481 | /* The column offset collects the differences between the |
| 2482 | * number of bytes encoding a character and the number of |
| 2483 | * columns will be used for rendering said character. |
| 2484 | * |
| 2485 | * So if some character A is encoded in 2 bytes, but will be |
| 2486 | * represented on the screen using only 1 byte this will and up |
| 2487 | * adding 1 to the multi-byte column offset. |
| 2488 | * |
| 2489 | * Assumes that no double-width character can be encoding in |
| 2490 | * less than two bytes. */ |
| 2491 | if (bytes > ucwidth) |
| 2492 | mbwidth += bytes - ucwidth; |
| 2493 | |
| 2494 | string += bytes; |
| 2495 | } |
| 2496 | |
| 2497 | *coloffset += mbwidth; |
| 2498 | |
| 2499 | return string - start; |
| 2500 | } |
| 2501 | |
| 2502 | |
| 2503 | /* |
| 2504 | * Status management |
| 2505 | */ |
| 2506 | |
| 2507 | /* Whether or not the curses interface has been initialized. */ |
| 2508 | static bool cursed = FALSE; |
| 2509 | |
| 2510 | /* The status window is used for polling keystrokes. */ |
| 2511 | static WINDOW *status_win; |
| 2512 | |
| 2513 | /* Update status and title window. */ |
| 2514 | static void |
| 2515 | report(const char *msg, ...) |
| 2516 | { |
| 2517 | static bool empty = TRUE; |
| 2518 | struct view *view = display[current_view]; |
| 2519 | |
| 2520 | if (!empty || *msg) { |
| 2521 | va_list args; |
| 2522 | |
| 2523 | va_start(args, msg); |
| 2524 | |
| 2525 | werase(status_win); |
| 2526 | wmove(status_win, 0, 0); |
| 2527 | if (*msg) { |
| 2528 | vwprintw(status_win, msg, args); |
| 2529 | empty = FALSE; |
| 2530 | } else { |
| 2531 | empty = TRUE; |
| 2532 | } |
| 2533 | wrefresh(status_win); |
| 2534 | |
| 2535 | va_end(args); |
| 2536 | } |
| 2537 | |
| 2538 | update_view_title(view); |
| 2539 | update_display_cursor(); |
| 2540 | } |
| 2541 | |
| 2542 | /* Controls when nodelay should be in effect when polling user input. */ |
| 2543 | static void |
| 2544 | set_nonblocking_input(bool loading) |
| 2545 | { |
| 2546 | static unsigned int loading_views; |
| 2547 | |
| 2548 | if ((loading == FALSE && loading_views-- == 1) || |
| 2549 | (loading == TRUE && loading_views++ == 0)) |
| 2550 | nodelay(status_win, loading); |
| 2551 | } |
| 2552 | |
| 2553 | static void |
| 2554 | init_display(void) |
| 2555 | { |
| 2556 | int x, y; |
| 2557 | |
| 2558 | /* Initialize the curses library */ |
| 2559 | if (isatty(STDIN_FILENO)) { |
| 2560 | cursed = !!initscr(); |
| 2561 | } else { |
| 2562 | /* Leave stdin and stdout alone when acting as a pager. */ |
| 2563 | FILE *io = fopen("/dev/tty", "r+"); |
| 2564 | |
| 2565 | cursed = !!newterm(NULL, io, io); |
| 2566 | } |
| 2567 | |
| 2568 | if (!cursed) |
| 2569 | die("Failed to initialize curses"); |
| 2570 | |
| 2571 | nonl(); /* Tell curses not to do NL->CR/NL on output */ |
| 2572 | cbreak(); /* Take input chars one at a time, no wait for \n */ |
| 2573 | noecho(); /* Don't echo input */ |
| 2574 | leaveok(stdscr, TRUE); |
| 2575 | |
| 2576 | if (has_colors()) |
| 2577 | init_colors(); |
| 2578 | |
| 2579 | getmaxyx(stdscr, y, x); |
| 2580 | status_win = newwin(1, 0, y - 1, 0); |
| 2581 | if (!status_win) |
| 2582 | die("Failed to create status window"); |
| 2583 | |
| 2584 | /* Enable keyboard mapping */ |
| 2585 | keypad(status_win, TRUE); |
| 2586 | wbkgdset(status_win, get_line_attr(LINE_STATUS)); |
| 2587 | } |
| 2588 | |
| 2589 | |
| 2590 | /* |
| 2591 | * Repository references |
| 2592 | */ |
| 2593 | |
| 2594 | static struct ref *refs; |
| 2595 | static size_t refs_size; |
| 2596 | |
| 2597 | /* Id <-> ref store */ |
| 2598 | static struct ref ***id_refs; |
| 2599 | static size_t id_refs_size; |
| 2600 | |
| 2601 | static struct ref ** |
| 2602 | get_refs(char *id) |
| 2603 | { |
| 2604 | struct ref ***tmp_id_refs; |
| 2605 | struct ref **ref_list = NULL; |
| 2606 | size_t ref_list_size = 0; |
| 2607 | size_t i; |
| 2608 | |
| 2609 | for (i = 0; i < id_refs_size; i++) |
| 2610 | if (!strcmp(id, id_refs[i][0]->id)) |
| 2611 | return id_refs[i]; |
| 2612 | |
| 2613 | tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs)); |
| 2614 | if (!tmp_id_refs) |
| 2615 | return NULL; |
| 2616 | |
| 2617 | id_refs = tmp_id_refs; |
| 2618 | |
| 2619 | for (i = 0; i < refs_size; i++) { |
| 2620 | struct ref **tmp; |
| 2621 | |
| 2622 | if (strcmp(id, refs[i].id)) |
| 2623 | continue; |
| 2624 | |
| 2625 | tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list)); |
| 2626 | if (!tmp) { |
| 2627 | if (ref_list) |
| 2628 | free(ref_list); |
| 2629 | return NULL; |
| 2630 | } |
| 2631 | |
| 2632 | ref_list = tmp; |
| 2633 | if (ref_list_size > 0) |
| 2634 | ref_list[ref_list_size - 1]->next = 1; |
| 2635 | ref_list[ref_list_size] = &refs[i]; |
| 2636 | |
| 2637 | /* XXX: The properties of the commit chains ensures that we can |
| 2638 | * safely modify the shared ref. The repo references will |
| 2639 | * always be similar for the same id. */ |
| 2640 | ref_list[ref_list_size]->next = 0; |
| 2641 | ref_list_size++; |
| 2642 | } |
| 2643 | |
| 2644 | if (ref_list) |
| 2645 | id_refs[id_refs_size++] = ref_list; |
| 2646 | |
| 2647 | return ref_list; |
| 2648 | } |
| 2649 | |
| 2650 | static int |
| 2651 | read_ref(char *id, int idlen, char *name, int namelen) |
| 2652 | { |
| 2653 | struct ref *ref; |
| 2654 | bool tag = FALSE; |
| 2655 | |
| 2656 | if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) { |
| 2657 | /* Commits referenced by tags has "^{}" appended. */ |
| 2658 | if (name[namelen - 1] != '}') |
| 2659 | return OK; |
| 2660 | |
| 2661 | while (namelen > 0 && name[namelen] != '^') |
| 2662 | namelen--; |
| 2663 | |
| 2664 | tag = TRUE; |
| 2665 | namelen -= STRING_SIZE("refs/tags/"); |
| 2666 | name += STRING_SIZE("refs/tags/"); |
| 2667 | |
| 2668 | } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) { |
| 2669 | namelen -= STRING_SIZE("refs/heads/"); |
| 2670 | name += STRING_SIZE("refs/heads/"); |
| 2671 | |
| 2672 | } else if (!strcmp(name, "HEAD")) { |
| 2673 | return OK; |
| 2674 | } |
| 2675 | |
| 2676 | refs = realloc(refs, sizeof(*refs) * (refs_size + 1)); |
| 2677 | if (!refs) |
| 2678 | return ERR; |
| 2679 | |
| 2680 | ref = &refs[refs_size++]; |
| 2681 | ref->name = malloc(namelen + 1); |
| 2682 | if (!ref->name) |
| 2683 | return ERR; |
| 2684 | |
| 2685 | strncpy(ref->name, name, namelen); |
| 2686 | ref->name[namelen] = 0; |
| 2687 | ref->tag = tag; |
| 2688 | string_copy(ref->id, id); |
| 2689 | |
| 2690 | return OK; |
| 2691 | } |
| 2692 | |
| 2693 | static int |
| 2694 | load_refs(void) |
| 2695 | { |
| 2696 | const char *cmd_env = getenv("TIG_LS_REMOTE"); |
| 2697 | const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE; |
| 2698 | |
| 2699 | return read_properties(popen(cmd, "r"), "\t", read_ref); |
| 2700 | } |
| 2701 | |
| 2702 | static int |
| 2703 | read_repo_config_option(char *name, int namelen, char *value, int valuelen) |
| 2704 | { |
| 2705 | if (!strcmp(name, "i18n.commitencoding")) |
| 2706 | string_copy(opt_encoding, value); |
| 2707 | |
| 2708 | return OK; |
| 2709 | } |
| 2710 | |
| 2711 | static int |
| 2712 | load_repo_config(void) |
| 2713 | { |
| 2714 | return read_properties(popen("git repo-config --list", "r"), |
| 2715 | "=", read_repo_config_option); |
| 2716 | } |
| 2717 | |
| 2718 | static int |
| 2719 | read_properties(FILE *pipe, const char *separators, |
| 2720 | int (*read_property)(char *, int, char *, int)) |
| 2721 | { |
| 2722 | char buffer[BUFSIZ]; |
| 2723 | char *name; |
| 2724 | int state = OK; |
| 2725 | |
| 2726 | if (!pipe) |
| 2727 | return ERR; |
| 2728 | |
| 2729 | while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) { |
| 2730 | char *value; |
| 2731 | size_t namelen; |
| 2732 | size_t valuelen; |
| 2733 | |
| 2734 | name = chomp_string(name); |
| 2735 | namelen = strcspn(name, separators); |
| 2736 | |
| 2737 | if (name[namelen]) { |
| 2738 | name[namelen] = 0; |
| 2739 | value = chomp_string(name + namelen + 1); |
| 2740 | valuelen = strlen(value); |
| 2741 | |
| 2742 | } else { |
| 2743 | value = ""; |
| 2744 | valuelen = 0; |
| 2745 | } |
| 2746 | |
| 2747 | state = read_property(name, namelen, value, valuelen); |
| 2748 | } |
| 2749 | |
| 2750 | if (state != ERR && ferror(pipe)) |
| 2751 | state = ERR; |
| 2752 | |
| 2753 | pclose(pipe); |
| 2754 | |
| 2755 | return state; |
| 2756 | } |
| 2757 | |
| 2758 | |
| 2759 | /* |
| 2760 | * Main |
| 2761 | */ |
| 2762 | |
| 2763 | static void __NORETURN |
| 2764 | quit(int sig) |
| 2765 | { |
| 2766 | /* XXX: Restore tty modes and let the OS cleanup the rest! */ |
| 2767 | if (cursed) |
| 2768 | endwin(); |
| 2769 | exit(0); |
| 2770 | } |
| 2771 | |
| 2772 | static void __NORETURN |
| 2773 | die(const char *err, ...) |
| 2774 | { |
| 2775 | va_list args; |
| 2776 | |
| 2777 | endwin(); |
| 2778 | |
| 2779 | va_start(args, err); |
| 2780 | fputs("tig: ", stderr); |
| 2781 | vfprintf(stderr, err, args); |
| 2782 | fputs("\n", stderr); |
| 2783 | va_end(args); |
| 2784 | |
| 2785 | exit(1); |
| 2786 | } |
| 2787 | |
| 2788 | int |
| 2789 | main(int argc, char *argv[]) |
| 2790 | { |
| 2791 | struct view *view; |
| 2792 | enum request request; |
| 2793 | size_t i; |
| 2794 | |
| 2795 | signal(SIGINT, quit); |
| 2796 | |
| 2797 | if (load_options() == ERR) |
| 2798 | die("Failed to load user config."); |
| 2799 | |
| 2800 | /* Load the repo config file so options can be overwritten from |
| 2801 | * the command line. */ |
| 2802 | if (load_repo_config() == ERR) |
| 2803 | die("Failed to load repo config."); |
| 2804 | |
| 2805 | if (!parse_options(argc, argv)) |
| 2806 | return 0; |
| 2807 | |
| 2808 | if (load_refs() == ERR) |
| 2809 | die("Failed to load refs."); |
| 2810 | |
| 2811 | /* Require a git repository unless when running in pager mode. */ |
| 2812 | if (refs_size == 0 && opt_request != REQ_VIEW_PAGER) |
| 2813 | die("Not a git repository"); |
| 2814 | |
| 2815 | for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++) |
| 2816 | view->cmd_env = getenv(view->cmd_env); |
| 2817 | |
| 2818 | request = opt_request; |
| 2819 | |
| 2820 | init_display(); |
| 2821 | |
| 2822 | while (view_driver(display[current_view], request)) { |
| 2823 | int key; |
| 2824 | int i; |
| 2825 | |
| 2826 | foreach_view (view, i) |
| 2827 | update_view(view); |
| 2828 | |
| 2829 | /* Refresh, accept single keystroke of input */ |
| 2830 | key = wgetch(status_win); |
| 2831 | |
| 2832 | request = get_keybinding(display[current_view]->keymap, key); |
| 2833 | |
| 2834 | /* Some low-level request handling. This keeps access to |
| 2835 | * status_win restricted. */ |
| 2836 | switch (request) { |
| 2837 | case REQ_PROMPT: |
| 2838 | report(":"); |
| 2839 | /* Temporarily switch to line-oriented and echoed |
| 2840 | * input. */ |
| 2841 | nocbreak(); |
| 2842 | echo(); |
| 2843 | |
| 2844 | if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) { |
| 2845 | memcpy(opt_cmd, "git ", 4); |
| 2846 | opt_request = REQ_VIEW_PAGER; |
| 2847 | } else { |
| 2848 | report("Prompt interrupted by loading view, " |
| 2849 | "press 'z' to stop loading views"); |
| 2850 | request = REQ_SCREEN_UPDATE; |
| 2851 | } |
| 2852 | |
| 2853 | noecho(); |
| 2854 | cbreak(); |
| 2855 | break; |
| 2856 | |
| 2857 | case REQ_SCREEN_RESIZE: |
| 2858 | { |
| 2859 | int height, width; |
| 2860 | |
| 2861 | getmaxyx(stdscr, height, width); |
| 2862 | |
| 2863 | /* Resize the status view and let the view driver take |
| 2864 | * care of resizing the displayed views. */ |
| 2865 | wresize(status_win, 1, width); |
| 2866 | mvwin(status_win, height - 1, 0); |
| 2867 | wrefresh(status_win); |
| 2868 | break; |
| 2869 | } |
| 2870 | default: |
| 2871 | break; |
| 2872 | } |
| 2873 | } |
| 2874 | |
| 2875 | quit(0); |
| 2876 | |
| 2877 | return 0; |
| 2878 | } |