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