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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 */
14 #ifndef VERSION
15 #define VERSION "tig-0.4.git"
16 #endif
18 #ifndef DEBUG
19 #define NDEBUG
20 #endif
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>
33 #include <sys/types.h>
34 #include <regex.h>
36 #include <locale.h>
37 #include <langinfo.h>
38 #include <iconv.h>
40 #include <curses.h>
42 #if __GNUC__ >= 3
43 #define __NORETURN __attribute__((__noreturn__))
44 #else
45 #define __NORETURN
46 #endif
48 static void __NORETURN die(const char *err, ...);
49 static void report(const char *msg, ...);
50 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
51 static void set_nonblocking_input(bool loading);
52 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
54 #define ABS(x) ((x) >= 0 ? (x) : -(x))
55 #define MIN(x, y) ((x) < (y) ? (x) : (y))
57 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
58 #define STRING_SIZE(x) (sizeof(x) - 1)
60 #define SIZEOF_STR 1024 /* Default string size. */
61 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
62 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
64 /* This color name can be used to refer to the default term colors. */
65 #define COLOR_DEFAULT (-1)
67 #define ICONV_NONE ((iconv_t) -1)
69 /* The format and size of the date column in the main view. */
70 #define DATE_FORMAT "%Y-%m-%d %H:%M"
71 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
73 #define AUTHOR_COLS 20
75 /* The default interval between line numbers. */
76 #define NUMBER_INTERVAL 1
78 #define TABSIZE 8
80 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
82 #define TIG_LS_REMOTE \
83 "git ls-remote . 2>/dev/null"
85 #define TIG_DIFF_CMD \
86 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
88 #define TIG_LOG_CMD \
89 "git log --cc --stat -n100 %s 2>/dev/null"
91 #define TIG_MAIN_CMD \
92 "git log --topo-order --pretty=raw %s 2>/dev/null"
94 #define TIG_TREE_CMD \
95 "git ls-tree %s %s"
97 #define TIG_BLOB_CMD \
98 "git cat-file blob %s"
100 /* XXX: Needs to be defined to the empty string. */
101 #define TIG_HELP_CMD ""
102 #define TIG_PAGER_CMD ""
104 /* Some ascii-shorthands fitted into the ncurses namespace. */
105 #define KEY_TAB '\t'
106 #define KEY_RETURN '\r'
107 #define KEY_ESC 27
110 struct ref {
111 char *name; /* Ref name; tag or head names are shortened. */
112 char id[41]; /* Commit SHA1 ID */
113 unsigned int tag:1; /* Is it a tag? */
114 unsigned int next:1; /* For ref lists: are there more refs? */
115 };
117 static struct ref **get_refs(char *id);
119 struct int_map {
120 const char *name;
121 int namelen;
122 int value;
123 };
125 static int
126 set_from_int_map(struct int_map *map, size_t map_size,
127 int *value, const char *name, int namelen)
128 {
130 int i;
132 for (i = 0; i < map_size; i++)
133 if (namelen == map[i].namelen &&
134 !strncasecmp(name, map[i].name, namelen)) {
135 *value = map[i].value;
136 return OK;
137 }
139 return ERR;
140 }
143 /*
144 * String helpers
145 */
147 static inline void
148 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
149 {
150 if (srclen > dstlen - 1)
151 srclen = dstlen - 1;
153 strncpy(dst, src, srclen);
154 dst[srclen] = 0;
155 }
157 /* Shorthands for safely copying into a fixed buffer. */
159 #define string_copy(dst, src) \
160 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
162 #define string_ncopy(dst, src, srclen) \
163 string_ncopy_do(dst, sizeof(dst), src, srclen)
165 static char *
166 chomp_string(char *name)
167 {
168 int namelen;
170 while (isspace(*name))
171 name++;
173 namelen = strlen(name) - 1;
174 while (namelen > 0 && isspace(name[namelen]))
175 name[namelen--] = 0;
177 return name;
178 }
180 static bool
181 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
182 {
183 va_list args;
184 size_t pos = bufpos ? *bufpos : 0;
186 va_start(args, fmt);
187 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
188 va_end(args);
190 if (bufpos)
191 *bufpos = pos;
193 return pos >= bufsize ? FALSE : TRUE;
194 }
196 #define string_format(buf, fmt, args...) \
197 string_nformat(buf, sizeof(buf), NULL, fmt, args)
199 #define string_format_from(buf, from, fmt, args...) \
200 string_nformat(buf, sizeof(buf), from, fmt, args)
202 static int
203 string_enum_compare(const char *str1, const char *str2, int len)
204 {
205 size_t i;
207 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
209 /* Diff-Header == DIFF_HEADER */
210 for (i = 0; i < len; i++) {
211 if (toupper(str1[i]) == toupper(str2[i]))
212 continue;
214 if (string_enum_sep(str1[i]) &&
215 string_enum_sep(str2[i]))
216 continue;
218 return str1[i] - str2[i];
219 }
221 return 0;
222 }
224 /* Shell quoting
225 *
226 * NOTE: The following is a slightly modified copy of the git project's shell
227 * quoting routines found in the quote.c file.
228 *
229 * Help to copy the thing properly quoted for the shell safety. any single
230 * quote is replaced with '\'', any exclamation point is replaced with '\!',
231 * and the whole thing is enclosed in a
232 *
233 * E.g.
234 * original sq_quote result
235 * name ==> name ==> 'name'
236 * a b ==> a b ==> 'a b'
237 * a'b ==> a'\''b ==> 'a'\''b'
238 * a!b ==> a'\!'b ==> 'a'\!'b'
239 */
241 static size_t
242 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
243 {
244 char c;
246 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
248 BUFPUT('\'');
249 while ((c = *src++)) {
250 if (c == '\'' || c == '!') {
251 BUFPUT('\'');
252 BUFPUT('\\');
253 BUFPUT(c);
254 BUFPUT('\'');
255 } else {
256 BUFPUT(c);
257 }
258 }
259 BUFPUT('\'');
261 return bufsize;
262 }
265 /*
266 * User requests
267 */
269 #define REQ_INFO \
270 /* XXX: Keep the view request first and in sync with views[]. */ \
271 REQ_GROUP("View switching") \
272 REQ_(VIEW_MAIN, "Show main view"), \
273 REQ_(VIEW_DIFF, "Show diff view"), \
274 REQ_(VIEW_LOG, "Show log view"), \
275 REQ_(VIEW_TREE, "Show tree view"), \
276 REQ_(VIEW_BLOB, "Show blob view"), \
277 REQ_(VIEW_HELP, "Show help page"), \
278 REQ_(VIEW_PAGER, "Show pager view"), \
279 \
280 REQ_GROUP("View manipulation") \
281 REQ_(ENTER, "Enter current line and scroll"), \
282 REQ_(NEXT, "Move to next"), \
283 REQ_(PREVIOUS, "Move to previous"), \
284 REQ_(VIEW_NEXT, "Move focus to next view"), \
285 REQ_(VIEW_CLOSE, "Close the current view"), \
286 REQ_(QUIT, "Close all views and quit"), \
287 \
288 REQ_GROUP("Cursor navigation") \
289 REQ_(MOVE_UP, "Move cursor one line up"), \
290 REQ_(MOVE_DOWN, "Move cursor one line down"), \
291 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
292 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
293 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
294 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
295 \
296 REQ_GROUP("Scrolling") \
297 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
298 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
299 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
300 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
301 \
302 REQ_GROUP("Searching") \
303 REQ_(SEARCH, "Search the view"), \
304 REQ_(SEARCH_BACK, "Search backwards in the view"), \
305 REQ_(FIND_NEXT, "Find next search match"), \
306 REQ_(FIND_PREV, "Find previous search match"), \
307 \
308 REQ_GROUP("Misc") \
309 REQ_(NONE, "Do nothing"), \
310 REQ_(PROMPT, "Bring up the prompt"), \
311 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
312 REQ_(SCREEN_RESIZE, "Resize the screen"), \
313 REQ_(SHOW_VERSION, "Show version information"), \
314 REQ_(STOP_LOADING, "Stop all loading views"), \
315 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
316 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
319 /* User action requests. */
320 enum request {
321 #define REQ_GROUP(help)
322 #define REQ_(req, help) REQ_##req
324 /* Offset all requests to avoid conflicts with ncurses getch values. */
325 REQ_OFFSET = KEY_MAX + 1,
326 REQ_INFO,
327 REQ_UNKNOWN,
329 #undef REQ_GROUP
330 #undef REQ_
331 };
333 struct request_info {
334 enum request request;
335 char *name;
336 int namelen;
337 char *help;
338 };
340 static struct request_info req_info[] = {
341 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
342 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
343 REQ_INFO
344 #undef REQ_GROUP
345 #undef REQ_
346 };
348 static enum request
349 get_request(const char *name)
350 {
351 int namelen = strlen(name);
352 int i;
354 for (i = 0; i < ARRAY_SIZE(req_info); i++)
355 if (req_info[i].namelen == namelen &&
356 !string_enum_compare(req_info[i].name, name, namelen))
357 return req_info[i].request;
359 return REQ_UNKNOWN;
360 }
363 /*
364 * Options
365 */
367 static const char usage[] =
368 VERSION " (" __DATE__ ")\n"
369 "\n"
370 "Usage: tig [options]\n"
371 " or: tig [options] [--] [git log options]\n"
372 " or: tig [options] log [git log options]\n"
373 " or: tig [options] diff [git diff options]\n"
374 " or: tig [options] show [git show options]\n"
375 " or: tig [options] < [git command output]\n"
376 "\n"
377 "Options:\n"
378 " -l Start up in log view\n"
379 " -d Start up in diff view\n"
380 " -n[I], --line-number[=I] Show line numbers with given interval\n"
381 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
382 " -- Mark end of tig options\n"
383 " -v, --version Show version and exit\n"
384 " -h, --help Show help message and exit\n";
386 /* Option and state variables. */
387 static bool opt_line_number = FALSE;
388 static bool opt_rev_graph = TRUE;
389 static int opt_num_interval = NUMBER_INTERVAL;
390 static int opt_tab_size = TABSIZE;
391 static enum request opt_request = REQ_VIEW_MAIN;
392 static char opt_cmd[SIZEOF_STR] = "";
393 static char opt_path[SIZEOF_STR] = "";
394 static FILE *opt_pipe = NULL;
395 static char opt_encoding[20] = "UTF-8";
396 static bool opt_utf8 = TRUE;
397 static char opt_codeset[20] = "UTF-8";
398 static iconv_t opt_iconv = ICONV_NONE;
399 static char opt_search[SIZEOF_STR] = "";
401 enum option_type {
402 OPT_NONE,
403 OPT_INT,
404 };
406 static bool
407 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
408 {
409 va_list args;
410 char *value = "";
411 int *number;
413 if (opt[0] != '-')
414 return FALSE;
416 if (opt[1] == '-') {
417 int namelen = strlen(name);
419 opt += 2;
421 if (strncmp(opt, name, namelen))
422 return FALSE;
424 if (opt[namelen] == '=')
425 value = opt + namelen + 1;
427 } else {
428 if (!short_name || opt[1] != short_name)
429 return FALSE;
430 value = opt + 2;
431 }
433 va_start(args, type);
434 if (type == OPT_INT) {
435 number = va_arg(args, int *);
436 if (isdigit(*value))
437 *number = atoi(value);
438 }
439 va_end(args);
441 return TRUE;
442 }
444 /* Returns the index of log or diff command or -1 to exit. */
445 static bool
446 parse_options(int argc, char *argv[])
447 {
448 int i;
450 for (i = 1; i < argc; i++) {
451 char *opt = argv[i];
453 if (!strcmp(opt, "-l")) {
454 opt_request = REQ_VIEW_LOG;
455 continue;
456 }
458 if (!strcmp(opt, "-d")) {
459 opt_request = REQ_VIEW_DIFF;
460 continue;
461 }
463 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
464 opt_line_number = TRUE;
465 continue;
466 }
468 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
469 opt_tab_size = MIN(opt_tab_size, TABSIZE);
470 continue;
471 }
473 if (check_option(opt, 'v', "version", OPT_NONE)) {
474 printf("tig version %s\n", VERSION);
475 return FALSE;
476 }
478 if (check_option(opt, 'h', "help", OPT_NONE)) {
479 printf(usage);
480 return FALSE;
481 }
483 if (!strcmp(opt, "--")) {
484 i++;
485 break;
486 }
488 if (!strcmp(opt, "log") ||
489 !strcmp(opt, "diff") ||
490 !strcmp(opt, "show")) {
491 opt_request = opt[0] == 'l'
492 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
493 break;
494 }
496 if (opt[0] && opt[0] != '-')
497 break;
499 die("unknown option '%s'\n\n%s", opt, usage);
500 }
502 if (!isatty(STDIN_FILENO)) {
503 opt_request = REQ_VIEW_PAGER;
504 opt_pipe = stdin;
506 } else if (i < argc) {
507 size_t buf_size;
509 if (opt_request == REQ_VIEW_MAIN)
510 /* XXX: This is vulnerable to the user overriding
511 * options required for the main view parser. */
512 string_copy(opt_cmd, "git log --stat --pretty=raw");
513 else
514 string_copy(opt_cmd, "git");
515 buf_size = strlen(opt_cmd);
517 while (buf_size < sizeof(opt_cmd) && i < argc) {
518 opt_cmd[buf_size++] = ' ';
519 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
520 }
522 if (buf_size >= sizeof(opt_cmd))
523 die("command too long");
525 opt_cmd[buf_size] = 0;
527 }
529 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
530 opt_utf8 = FALSE;
532 return TRUE;
533 }
536 /*
537 * Line-oriented content detection.
538 */
540 #define LINE_INFO \
541 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
542 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
543 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
544 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
545 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
546 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
547 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
548 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
549 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
550 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
551 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
552 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
553 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
554 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
555 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
556 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
557 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
558 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
559 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
560 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
561 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
562 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
563 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
564 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
565 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
566 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
567 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
568 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
569 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
570 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
571 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
572 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
573 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
574 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
575 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
576 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
577 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
578 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
579 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
580 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
582 enum line_type {
583 #define LINE(type, line, fg, bg, attr) \
584 LINE_##type
585 LINE_INFO
586 #undef LINE
587 };
589 struct line_info {
590 const char *name; /* Option name. */
591 int namelen; /* Size of option name. */
592 const char *line; /* The start of line to match. */
593 int linelen; /* Size of string to match. */
594 int fg, bg, attr; /* Color and text attributes for the lines. */
595 };
597 static struct line_info line_info[] = {
598 #define LINE(type, line, fg, bg, attr) \
599 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
600 LINE_INFO
601 #undef LINE
602 };
604 static enum line_type
605 get_line_type(char *line)
606 {
607 int linelen = strlen(line);
608 enum line_type type;
610 for (type = 0; type < ARRAY_SIZE(line_info); type++)
611 /* Case insensitive search matches Signed-off-by lines better. */
612 if (linelen >= line_info[type].linelen &&
613 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
614 return type;
616 return LINE_DEFAULT;
617 }
619 static inline int
620 get_line_attr(enum line_type type)
621 {
622 assert(type < ARRAY_SIZE(line_info));
623 return COLOR_PAIR(type) | line_info[type].attr;
624 }
626 static struct line_info *
627 get_line_info(char *name, int namelen)
628 {
629 enum line_type type;
631 for (type = 0; type < ARRAY_SIZE(line_info); type++)
632 if (namelen == line_info[type].namelen &&
633 !string_enum_compare(line_info[type].name, name, namelen))
634 return &line_info[type];
636 return NULL;
637 }
639 static void
640 init_colors(void)
641 {
642 int default_bg = COLOR_BLACK;
643 int default_fg = COLOR_WHITE;
644 enum line_type type;
646 start_color();
648 if (use_default_colors() != ERR) {
649 default_bg = -1;
650 default_fg = -1;
651 }
653 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
654 struct line_info *info = &line_info[type];
655 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
656 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
658 init_pair(type, fg, bg);
659 }
660 }
662 struct line {
663 enum line_type type;
665 /* State flags */
666 unsigned int selected:1;
668 void *data; /* User data */
669 };
672 /*
673 * Keys
674 */
676 struct keybinding {
677 int alias;
678 enum request request;
679 struct keybinding *next;
680 };
682 static struct keybinding default_keybindings[] = {
683 /* View switching */
684 { 'm', REQ_VIEW_MAIN },
685 { 'd', REQ_VIEW_DIFF },
686 { 'l', REQ_VIEW_LOG },
687 { 't', REQ_VIEW_TREE },
688 { 'f', REQ_VIEW_BLOB },
689 { 'p', REQ_VIEW_PAGER },
690 { 'h', REQ_VIEW_HELP },
692 /* View manipulation */
693 { 'q', REQ_VIEW_CLOSE },
694 { KEY_TAB, REQ_VIEW_NEXT },
695 { KEY_RETURN, REQ_ENTER },
696 { KEY_UP, REQ_PREVIOUS },
697 { KEY_DOWN, REQ_NEXT },
699 /* Cursor navigation */
700 { 'k', REQ_MOVE_UP },
701 { 'j', REQ_MOVE_DOWN },
702 { KEY_HOME, REQ_MOVE_FIRST_LINE },
703 { KEY_END, REQ_MOVE_LAST_LINE },
704 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
705 { ' ', REQ_MOVE_PAGE_DOWN },
706 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
707 { 'b', REQ_MOVE_PAGE_UP },
708 { '-', REQ_MOVE_PAGE_UP },
710 /* Scrolling */
711 { KEY_IC, REQ_SCROLL_LINE_UP },
712 { KEY_DC, REQ_SCROLL_LINE_DOWN },
713 { 'w', REQ_SCROLL_PAGE_UP },
714 { 's', REQ_SCROLL_PAGE_DOWN },
716 /* Searching */
717 { '/', REQ_SEARCH },
718 { '?', REQ_SEARCH_BACK },
719 { 'n', REQ_FIND_NEXT },
720 { 'N', REQ_FIND_PREV },
722 /* Misc */
723 { 'Q', REQ_QUIT },
724 { 'z', REQ_STOP_LOADING },
725 { 'v', REQ_SHOW_VERSION },
726 { 'r', REQ_SCREEN_REDRAW },
727 { '.', REQ_TOGGLE_LINENO },
728 { 'g', REQ_TOGGLE_REV_GRAPH },
729 { ':', REQ_PROMPT },
731 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
732 { ERR, REQ_NONE },
734 /* Using the ncurses SIGWINCH handler. */
735 { KEY_RESIZE, REQ_SCREEN_RESIZE },
736 };
738 #define KEYMAP_INFO \
739 KEYMAP_(GENERIC), \
740 KEYMAP_(MAIN), \
741 KEYMAP_(DIFF), \
742 KEYMAP_(LOG), \
743 KEYMAP_(TREE), \
744 KEYMAP_(BLOB), \
745 KEYMAP_(PAGER), \
746 KEYMAP_(HELP) \
748 enum keymap {
749 #define KEYMAP_(name) KEYMAP_##name
750 KEYMAP_INFO
751 #undef KEYMAP_
752 };
754 static struct int_map keymap_table[] = {
755 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
756 KEYMAP_INFO
757 #undef KEYMAP_
758 };
760 #define set_keymap(map, name) \
761 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
763 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
765 static void
766 add_keybinding(enum keymap keymap, enum request request, int key)
767 {
768 struct keybinding *keybinding;
770 keybinding = calloc(1, sizeof(*keybinding));
771 if (!keybinding)
772 die("Failed to allocate keybinding");
774 keybinding->alias = key;
775 keybinding->request = request;
776 keybinding->next = keybindings[keymap];
777 keybindings[keymap] = keybinding;
778 }
780 /* Looks for a key binding first in the given map, then in the generic map, and
781 * lastly in the default keybindings. */
782 static enum request
783 get_keybinding(enum keymap keymap, int key)
784 {
785 struct keybinding *kbd;
786 int i;
788 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
789 if (kbd->alias == key)
790 return kbd->request;
792 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
793 if (kbd->alias == key)
794 return kbd->request;
796 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
797 if (default_keybindings[i].alias == key)
798 return default_keybindings[i].request;
800 return (enum request) key;
801 }
804 struct key {
805 char *name;
806 int value;
807 };
809 static struct key key_table[] = {
810 { "Enter", KEY_RETURN },
811 { "Space", ' ' },
812 { "Backspace", KEY_BACKSPACE },
813 { "Tab", KEY_TAB },
814 { "Escape", KEY_ESC },
815 { "Left", KEY_LEFT },
816 { "Right", KEY_RIGHT },
817 { "Up", KEY_UP },
818 { "Down", KEY_DOWN },
819 { "Insert", KEY_IC },
820 { "Delete", KEY_DC },
821 { "Hash", '#' },
822 { "Home", KEY_HOME },
823 { "End", KEY_END },
824 { "PageUp", KEY_PPAGE },
825 { "PageDown", KEY_NPAGE },
826 { "F1", KEY_F(1) },
827 { "F2", KEY_F(2) },
828 { "F3", KEY_F(3) },
829 { "F4", KEY_F(4) },
830 { "F5", KEY_F(5) },
831 { "F6", KEY_F(6) },
832 { "F7", KEY_F(7) },
833 { "F8", KEY_F(8) },
834 { "F9", KEY_F(9) },
835 { "F10", KEY_F(10) },
836 { "F11", KEY_F(11) },
837 { "F12", KEY_F(12) },
838 };
840 static int
841 get_key_value(const char *name)
842 {
843 int i;
845 for (i = 0; i < ARRAY_SIZE(key_table); i++)
846 if (!strcasecmp(key_table[i].name, name))
847 return key_table[i].value;
849 if (strlen(name) == 1 && isprint(*name))
850 return (int) *name;
852 return ERR;
853 }
855 static char *
856 get_key(enum request request)
857 {
858 static char buf[BUFSIZ];
859 static char key_char[] = "'X'";
860 size_t pos = 0;
861 char *sep = " ";
862 int i;
864 buf[pos] = 0;
866 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
867 struct keybinding *keybinding = &default_keybindings[i];
868 char *seq = NULL;
869 int key;
871 if (keybinding->request != request)
872 continue;
874 for (key = 0; key < ARRAY_SIZE(key_table); key++)
875 if (key_table[key].value == keybinding->alias)
876 seq = key_table[key].name;
878 if (seq == NULL &&
879 keybinding->alias < 127 &&
880 isprint(keybinding->alias)) {
881 key_char[1] = (char) keybinding->alias;
882 seq = key_char;
883 }
885 if (!seq)
886 seq = "'?'";
888 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
889 return "Too many keybindings!";
890 sep = ", ";
891 }
893 return buf;
894 }
897 /*
898 * User config file handling.
899 */
901 static struct int_map color_map[] = {
902 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
903 COLOR_MAP(DEFAULT),
904 COLOR_MAP(BLACK),
905 COLOR_MAP(BLUE),
906 COLOR_MAP(CYAN),
907 COLOR_MAP(GREEN),
908 COLOR_MAP(MAGENTA),
909 COLOR_MAP(RED),
910 COLOR_MAP(WHITE),
911 COLOR_MAP(YELLOW),
912 };
914 #define set_color(color, name) \
915 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
917 static struct int_map attr_map[] = {
918 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
919 ATTR_MAP(NORMAL),
920 ATTR_MAP(BLINK),
921 ATTR_MAP(BOLD),
922 ATTR_MAP(DIM),
923 ATTR_MAP(REVERSE),
924 ATTR_MAP(STANDOUT),
925 ATTR_MAP(UNDERLINE),
926 };
928 #define set_attribute(attr, name) \
929 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
931 static int config_lineno;
932 static bool config_errors;
933 static char *config_msg;
935 /* Wants: object fgcolor bgcolor [attr] */
936 static int
937 option_color_command(int argc, char *argv[])
938 {
939 struct line_info *info;
941 if (argc != 3 && argc != 4) {
942 config_msg = "Wrong number of arguments given to color command";
943 return ERR;
944 }
946 info = get_line_info(argv[0], strlen(argv[0]));
947 if (!info) {
948 config_msg = "Unknown color name";
949 return ERR;
950 }
952 if (set_color(&info->fg, argv[1]) == ERR ||
953 set_color(&info->bg, argv[2]) == ERR) {
954 config_msg = "Unknown color";
955 return ERR;
956 }
958 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
959 config_msg = "Unknown attribute";
960 return ERR;
961 }
963 return OK;
964 }
966 /* Wants: name = value */
967 static int
968 option_set_command(int argc, char *argv[])
969 {
970 if (argc != 3) {
971 config_msg = "Wrong number of arguments given to set command";
972 return ERR;
973 }
975 if (strcmp(argv[1], "=")) {
976 config_msg = "No value assigned";
977 return ERR;
978 }
980 if (!strcmp(argv[0], "show-rev-graph")) {
981 opt_rev_graph = (!strcmp(argv[2], "1") ||
982 !strcmp(argv[2], "true") ||
983 !strcmp(argv[2], "yes"));
984 return OK;
985 }
987 if (!strcmp(argv[0], "line-number-interval")) {
988 opt_num_interval = atoi(argv[2]);
989 return OK;
990 }
992 if (!strcmp(argv[0], "tab-size")) {
993 opt_tab_size = atoi(argv[2]);
994 return OK;
995 }
997 if (!strcmp(argv[0], "commit-encoding")) {
998 char *arg = argv[2];
999 int delimiter = *arg;
1000 int i;
1002 switch (delimiter) {
1003 case '"':
1004 case '\'':
1005 for (arg++, i = 0; arg[i]; i++)
1006 if (arg[i] == delimiter) {
1007 arg[i] = 0;
1008 break;
1009 }
1010 default:
1011 string_copy(opt_encoding, arg);
1012 return OK;
1013 }
1014 }
1016 config_msg = "Unknown variable name";
1017 return ERR;
1018 }
1020 /* Wants: mode request key */
1021 static int
1022 option_bind_command(int argc, char *argv[])
1023 {
1024 enum request request;
1025 int keymap;
1026 int key;
1028 if (argc != 3) {
1029 config_msg = "Wrong number of arguments given to bind command";
1030 return ERR;
1031 }
1033 if (set_keymap(&keymap, argv[0]) == ERR) {
1034 config_msg = "Unknown key map";
1035 return ERR;
1036 }
1038 key = get_key_value(argv[1]);
1039 if (key == ERR) {
1040 config_msg = "Unknown key";
1041 return ERR;
1042 }
1044 request = get_request(argv[2]);
1045 if (request == REQ_UNKNOWN) {
1046 config_msg = "Unknown request name";
1047 return ERR;
1048 }
1050 add_keybinding(keymap, request, key);
1052 return OK;
1053 }
1055 static int
1056 set_option(char *opt, char *value)
1057 {
1058 char *argv[16];
1059 int valuelen;
1060 int argc = 0;
1062 /* Tokenize */
1063 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1064 argv[argc++] = value;
1066 value += valuelen;
1067 if (!*value)
1068 break;
1070 *value++ = 0;
1071 while (isspace(*value))
1072 value++;
1073 }
1075 if (!strcmp(opt, "color"))
1076 return option_color_command(argc, argv);
1078 if (!strcmp(opt, "set"))
1079 return option_set_command(argc, argv);
1081 if (!strcmp(opt, "bind"))
1082 return option_bind_command(argc, argv);
1084 config_msg = "Unknown option command";
1085 return ERR;
1086 }
1088 static int
1089 read_option(char *opt, int optlen, char *value, int valuelen)
1090 {
1091 int status = OK;
1093 config_lineno++;
1094 config_msg = "Internal error";
1096 /* Check for comment markers, since read_properties() will
1097 * only ensure opt and value are split at first " \t". */
1098 optlen = strcspn(opt, "#");
1099 if (optlen == 0)
1100 return OK;
1102 if (opt[optlen] != 0) {
1103 config_msg = "No option value";
1104 status = ERR;
1106 } else {
1107 /* Look for comment endings in the value. */
1108 int len = strcspn(value, "#");
1110 if (len < valuelen) {
1111 valuelen = len;
1112 value[valuelen] = 0;
1113 }
1115 status = set_option(opt, value);
1116 }
1118 if (status == ERR) {
1119 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1120 config_lineno, optlen, opt, config_msg);
1121 config_errors = TRUE;
1122 }
1124 /* Always keep going if errors are encountered. */
1125 return OK;
1126 }
1128 static int
1129 load_options(void)
1130 {
1131 char *home = getenv("HOME");
1132 char buf[SIZEOF_STR];
1133 FILE *file;
1135 config_lineno = 0;
1136 config_errors = FALSE;
1138 if (!home || !string_format(buf, "%s/.tigrc", home))
1139 return ERR;
1141 /* It's ok that the file doesn't exist. */
1142 file = fopen(buf, "r");
1143 if (!file)
1144 return OK;
1146 if (read_properties(file, " \t", read_option) == ERR ||
1147 config_errors == TRUE)
1148 fprintf(stderr, "Errors while loading %s.\n", buf);
1150 return OK;
1151 }
1154 /*
1155 * The viewer
1156 */
1158 struct view;
1159 struct view_ops;
1161 /* The display array of active views and the index of the current view. */
1162 static struct view *display[2];
1163 static unsigned int current_view;
1165 #define foreach_displayed_view(view, i) \
1166 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1168 #define displayed_views() (display[1] != NULL ? 2 : 1)
1170 /* Current head and commit ID */
1171 static char ref_blob[SIZEOF_REF] = "";
1172 static char ref_commit[SIZEOF_REF] = "HEAD";
1173 static char ref_head[SIZEOF_REF] = "HEAD";
1175 struct view {
1176 const char *name; /* View name */
1177 const char *cmd_fmt; /* Default command line format */
1178 const char *cmd_env; /* Command line set via environment */
1179 const char *id; /* Points to either of ref_{head,commit,blob} */
1181 struct view_ops *ops; /* View operations */
1183 enum keymap keymap; /* What keymap does this view have */
1185 char cmd[SIZEOF_STR]; /* Command buffer */
1186 char ref[SIZEOF_REF]; /* Hovered commit reference */
1187 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1189 int height, width; /* The width and height of the main window */
1190 WINDOW *win; /* The main window */
1191 WINDOW *title; /* The title window living below the main window */
1193 /* Navigation */
1194 unsigned long offset; /* Offset of the window top */
1195 unsigned long lineno; /* Current line number */
1197 /* Searching */
1198 char grep[SIZEOF_STR]; /* Search string */
1199 regex_t *regex; /* Pre-compiled regex */
1201 /* If non-NULL, points to the view that opened this view. If this view
1202 * is closed tig will switch back to the parent view. */
1203 struct view *parent;
1205 /* Buffering */
1206 unsigned long lines; /* Total number of lines */
1207 struct line *line; /* Line index */
1208 unsigned long line_size;/* Total number of allocated lines */
1209 unsigned int digits; /* Number of digits in the lines member. */
1211 /* Loading */
1212 FILE *pipe;
1213 time_t start_time;
1214 };
1216 struct view_ops {
1217 /* What type of content being displayed. Used in the title bar. */
1218 const char *type;
1219 /* Draw one line; @lineno must be < view->height. */
1220 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1221 /* Read one line; updates view->line. */
1222 bool (*read)(struct view *view, char *data);
1223 /* Depending on view, change display based on current line. */
1224 bool (*enter)(struct view *view, struct line *line);
1225 /* Search for regex in a line. */
1226 bool (*grep)(struct view *view, struct line *line);
1227 /* Select line */
1228 void (*select)(struct view *view, struct line *line);
1229 };
1231 static struct view_ops pager_ops;
1232 static struct view_ops main_ops;
1233 static struct view_ops tree_ops;
1234 static struct view_ops blob_ops;
1236 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1237 { name, cmd, #env, ref, ops, map}
1239 #define VIEW_(id, name, ops, ref) \
1240 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1243 static struct view views[] = {
1244 VIEW_(MAIN, "main", &main_ops, ref_head),
1245 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1246 VIEW_(LOG, "log", &pager_ops, ref_head),
1247 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1248 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1249 VIEW_(HELP, "help", &pager_ops, "static"),
1250 VIEW_(PAGER, "pager", &pager_ops, "static"),
1251 };
1253 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1255 #define foreach_view(view, i) \
1256 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1258 #define view_is_displayed(view) \
1259 (view == display[0] || view == display[1])
1261 static bool
1262 draw_view_line(struct view *view, unsigned int lineno)
1263 {
1264 struct line *line;
1265 bool selected = (view->offset + lineno == view->lineno);
1267 assert(view_is_displayed(view));
1269 if (view->offset + lineno >= view->lines)
1270 return FALSE;
1272 line = &view->line[view->offset + lineno];
1274 if (selected) {
1275 line->selected = TRUE;
1276 view->ops->select(view, line);
1277 } else if (line->selected) {
1278 line->selected = FALSE;
1279 wmove(view->win, lineno, 0);
1280 wclrtoeol(view->win);
1281 }
1283 return view->ops->draw(view, line, lineno, selected);
1284 }
1286 static void
1287 redraw_view_from(struct view *view, int lineno)
1288 {
1289 assert(0 <= lineno && lineno < view->height);
1291 for (; lineno < view->height; lineno++) {
1292 if (!draw_view_line(view, lineno))
1293 break;
1294 }
1296 redrawwin(view->win);
1297 wrefresh(view->win);
1298 }
1300 static void
1301 redraw_view(struct view *view)
1302 {
1303 wclear(view->win);
1304 redraw_view_from(view, 0);
1305 }
1308 static void
1309 update_view_title(struct view *view)
1310 {
1311 assert(view_is_displayed(view));
1313 if (view == display[current_view])
1314 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1315 else
1316 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1318 werase(view->title);
1319 wmove(view->title, 0, 0);
1321 if (*view->ref)
1322 wprintw(view->title, "[%s] %s", view->name, view->ref);
1323 else
1324 wprintw(view->title, "[%s]", view->name);
1326 if (view->lines || view->pipe) {
1327 unsigned int view_lines = view->offset + view->height;
1328 unsigned int lines = view->lines
1329 ? MIN(view_lines, view->lines) * 100 / view->lines
1330 : 0;
1332 wprintw(view->title, " - %s %d of %d (%d%%)",
1333 view->ops->type,
1334 view->lineno + 1,
1335 view->lines,
1336 lines);
1337 }
1339 if (view->pipe) {
1340 time_t secs = time(NULL) - view->start_time;
1342 /* Three git seconds are a long time ... */
1343 if (secs > 2)
1344 wprintw(view->title, " %lds", secs);
1345 }
1347 wmove(view->title, 0, view->width - 1);
1348 wrefresh(view->title);
1349 }
1351 static void
1352 resize_display(void)
1353 {
1354 int offset, i;
1355 struct view *base = display[0];
1356 struct view *view = display[1] ? display[1] : display[0];
1358 /* Setup window dimensions */
1360 getmaxyx(stdscr, base->height, base->width);
1362 /* Make room for the status window. */
1363 base->height -= 1;
1365 if (view != base) {
1366 /* Horizontal split. */
1367 view->width = base->width;
1368 view->height = SCALE_SPLIT_VIEW(base->height);
1369 base->height -= view->height;
1371 /* Make room for the title bar. */
1372 view->height -= 1;
1373 }
1375 /* Make room for the title bar. */
1376 base->height -= 1;
1378 offset = 0;
1380 foreach_displayed_view (view, i) {
1381 if (!view->win) {
1382 view->win = newwin(view->height, 0, offset, 0);
1383 if (!view->win)
1384 die("Failed to create %s view", view->name);
1386 scrollok(view->win, TRUE);
1388 view->title = newwin(1, 0, offset + view->height, 0);
1389 if (!view->title)
1390 die("Failed to create title window");
1392 } else {
1393 wresize(view->win, view->height, view->width);
1394 mvwin(view->win, offset, 0);
1395 mvwin(view->title, offset + view->height, 0);
1396 }
1398 offset += view->height + 1;
1399 }
1400 }
1402 static void
1403 redraw_display(void)
1404 {
1405 struct view *view;
1406 int i;
1408 foreach_displayed_view (view, i) {
1409 redraw_view(view);
1410 update_view_title(view);
1411 }
1412 }
1414 static void
1415 update_display_cursor(void)
1416 {
1417 struct view *view = display[current_view];
1419 /* Move the cursor to the right-most column of the cursor line.
1420 *
1421 * XXX: This could turn out to be a bit expensive, but it ensures that
1422 * the cursor does not jump around. */
1423 if (view->lines) {
1424 wmove(view->win, view->lineno - view->offset, view->width - 1);
1425 wrefresh(view->win);
1426 }
1427 }
1429 /*
1430 * Navigation
1431 */
1433 /* Scrolling backend */
1434 static void
1435 do_scroll_view(struct view *view, int lines, bool redraw)
1436 {
1437 bool redraw_current_line = FALSE;
1439 assert(view_is_displayed(view));
1441 /* The rendering expects the new offset. */
1442 view->offset += lines;
1444 assert(0 <= view->offset && view->offset < view->lines);
1445 assert(lines);
1447 /* Move current line into the view. */
1448 if (view->lineno < view->offset) {
1449 view->lineno = view->offset;
1450 redraw_current_line = TRUE;
1451 } else if (view->lineno >= view->offset + view->height) {
1452 view->lineno = view->offset + view->height - 1;
1453 redraw_current_line = TRUE;
1454 }
1456 assert(view->offset <= view->lineno && view->lineno < view->lines);
1458 /* Redraw the whole screen if scrolling is pointless. */
1459 if (view->height < ABS(lines)) {
1460 redraw_view(view);
1462 } else {
1463 int line = lines > 0 ? view->height - lines : 0;
1464 int end = line + ABS(lines);
1466 wscrl(view->win, lines);
1468 for (; line < end; line++) {
1469 if (!draw_view_line(view, line))
1470 break;
1471 }
1473 if (redraw_current_line)
1474 draw_view_line(view, view->lineno - view->offset);
1475 }
1477 if (!redraw)
1478 return;
1480 redrawwin(view->win);
1481 wrefresh(view->win);
1482 report("");
1483 }
1485 /* Scroll frontend */
1486 static void
1487 scroll_view(struct view *view, enum request request)
1488 {
1489 int lines = 1;
1491 switch (request) {
1492 case REQ_SCROLL_PAGE_DOWN:
1493 lines = view->height;
1494 case REQ_SCROLL_LINE_DOWN:
1495 if (view->offset + lines > view->lines)
1496 lines = view->lines - view->offset;
1498 if (lines == 0 || view->offset + view->height >= view->lines) {
1499 report("Cannot scroll beyond the last line");
1500 return;
1501 }
1502 break;
1504 case REQ_SCROLL_PAGE_UP:
1505 lines = view->height;
1506 case REQ_SCROLL_LINE_UP:
1507 if (lines > view->offset)
1508 lines = view->offset;
1510 if (lines == 0) {
1511 report("Cannot scroll beyond the first line");
1512 return;
1513 }
1515 lines = -lines;
1516 break;
1518 default:
1519 die("request %d not handled in switch", request);
1520 }
1522 do_scroll_view(view, lines, TRUE);
1523 }
1525 /* Cursor moving */
1526 static void
1527 move_view(struct view *view, enum request request, bool redraw)
1528 {
1529 int steps;
1531 switch (request) {
1532 case REQ_MOVE_FIRST_LINE:
1533 steps = -view->lineno;
1534 break;
1536 case REQ_MOVE_LAST_LINE:
1537 steps = view->lines - view->lineno - 1;
1538 break;
1540 case REQ_MOVE_PAGE_UP:
1541 steps = view->height > view->lineno
1542 ? -view->lineno : -view->height;
1543 break;
1545 case REQ_MOVE_PAGE_DOWN:
1546 steps = view->lineno + view->height >= view->lines
1547 ? view->lines - view->lineno - 1 : view->height;
1548 break;
1550 case REQ_MOVE_UP:
1551 steps = -1;
1552 break;
1554 case REQ_MOVE_DOWN:
1555 steps = 1;
1556 break;
1558 default:
1559 die("request %d not handled in switch", request);
1560 }
1562 if (steps <= 0 && view->lineno == 0) {
1563 report("Cannot move beyond the first line");
1564 return;
1566 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1567 report("Cannot move beyond the last line");
1568 return;
1569 }
1571 /* Move the current line */
1572 view->lineno += steps;
1573 assert(0 <= view->lineno && view->lineno < view->lines);
1575 /* Repaint the old "current" line if we be scrolling */
1576 if (ABS(steps) < view->height)
1577 draw_view_line(view, view->lineno - steps - view->offset);
1579 /* Check whether the view needs to be scrolled */
1580 if (view->lineno < view->offset ||
1581 view->lineno >= view->offset + view->height) {
1582 if (steps < 0 && -steps > view->offset) {
1583 steps = -view->offset;
1585 } else if (steps > 0) {
1586 if (view->lineno == view->lines - 1 &&
1587 view->lines > view->height) {
1588 steps = view->lines - view->offset - 1;
1589 if (steps >= view->height)
1590 steps -= view->height - 1;
1591 }
1592 }
1594 do_scroll_view(view, steps, redraw);
1595 return;
1596 }
1598 /* Draw the current line */
1599 draw_view_line(view, view->lineno - view->offset);
1601 if (!redraw)
1602 return;
1604 redrawwin(view->win);
1605 wrefresh(view->win);
1606 report("");
1607 }
1610 /*
1611 * Searching
1612 */
1614 static void search_view(struct view *view, enum request request);
1616 static bool
1617 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1618 {
1619 assert(view_is_displayed(view));
1621 if (!view->ops->grep(view, line))
1622 return FALSE;
1624 if (lineno - view->offset >= view->height) {
1625 view->offset = lineno;
1626 view->lineno = lineno;
1627 redraw_view(view);
1629 } else {
1630 unsigned long old_lineno = view->lineno - view->offset;
1632 view->lineno = lineno;
1633 draw_view_line(view, old_lineno);
1635 draw_view_line(view, view->lineno - view->offset);
1636 redrawwin(view->win);
1637 wrefresh(view->win);
1638 }
1640 report("Line %ld matches '%s'", lineno + 1, view->grep);
1641 return TRUE;
1642 }
1644 static void
1645 find_next(struct view *view, enum request request)
1646 {
1647 unsigned long lineno = view->lineno;
1648 int direction;
1650 if (!*view->grep) {
1651 if (!*opt_search)
1652 report("No previous search");
1653 else
1654 search_view(view, request);
1655 return;
1656 }
1658 switch (request) {
1659 case REQ_SEARCH:
1660 case REQ_FIND_NEXT:
1661 direction = 1;
1662 break;
1664 case REQ_SEARCH_BACK:
1665 case REQ_FIND_PREV:
1666 direction = -1;
1667 break;
1669 default:
1670 return;
1671 }
1673 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1674 lineno += direction;
1676 /* Note, lineno is unsigned long so will wrap around in which case it
1677 * will become bigger than view->lines. */
1678 for (; lineno < view->lines; lineno += direction) {
1679 struct line *line = &view->line[lineno];
1681 if (find_next_line(view, lineno, line))
1682 return;
1683 }
1685 report("No match found for '%s'", view->grep);
1686 }
1688 static void
1689 search_view(struct view *view, enum request request)
1690 {
1691 int regex_err;
1693 if (view->regex) {
1694 regfree(view->regex);
1695 *view->grep = 0;
1696 } else {
1697 view->regex = calloc(1, sizeof(*view->regex));
1698 if (!view->regex)
1699 return;
1700 }
1702 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1703 if (regex_err != 0) {
1704 char buf[SIZEOF_STR] = "unknown error";
1706 regerror(regex_err, view->regex, buf, sizeof(buf));
1707 report("Search failed: %s", buf);
1708 return;
1709 }
1711 string_copy(view->grep, opt_search);
1713 find_next(view, request);
1714 }
1716 /*
1717 * Incremental updating
1718 */
1720 static void
1721 end_update(struct view *view)
1722 {
1723 if (!view->pipe)
1724 return;
1725 set_nonblocking_input(FALSE);
1726 if (view->pipe == stdin)
1727 fclose(view->pipe);
1728 else
1729 pclose(view->pipe);
1730 view->pipe = NULL;
1731 }
1733 static bool
1734 begin_update(struct view *view)
1735 {
1736 const char *id = view->id;
1738 if (view->pipe)
1739 end_update(view);
1741 if (opt_cmd[0]) {
1742 string_copy(view->cmd, opt_cmd);
1743 opt_cmd[0] = 0;
1744 /* When running random commands, the view ref could have become
1745 * invalid so clear it. */
1746 view->ref[0] = 0;
1748 } else if (view == VIEW(REQ_VIEW_TREE)) {
1749 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1751 if (strcmp(view->vid, view->id))
1752 opt_path[0] = 0;
1754 if (!string_format(view->cmd, format, id, opt_path))
1755 return FALSE;
1757 } else {
1758 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1760 if (!string_format(view->cmd, format, id, id, id, id, id))
1761 return FALSE;
1762 }
1764 /* Special case for the pager view. */
1765 if (opt_pipe) {
1766 view->pipe = opt_pipe;
1767 opt_pipe = NULL;
1768 } else {
1769 view->pipe = popen(view->cmd, "r");
1770 }
1772 if (!view->pipe)
1773 return FALSE;
1775 set_nonblocking_input(TRUE);
1777 view->offset = 0;
1778 view->lines = 0;
1779 view->lineno = 0;
1780 string_copy(view->vid, id);
1782 if (view->line) {
1783 int i;
1785 for (i = 0; i < view->lines; i++)
1786 if (view->line[i].data)
1787 free(view->line[i].data);
1789 free(view->line);
1790 view->line = NULL;
1791 }
1793 view->start_time = time(NULL);
1795 return TRUE;
1796 }
1798 static struct line *
1799 realloc_lines(struct view *view, size_t line_size)
1800 {
1801 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1803 if (!tmp)
1804 return NULL;
1806 view->line = tmp;
1807 view->line_size = line_size;
1808 return view->line;
1809 }
1811 static bool
1812 update_view(struct view *view)
1813 {
1814 char in_buffer[BUFSIZ];
1815 char out_buffer[BUFSIZ * 2];
1816 char *line;
1817 /* The number of lines to read. If too low it will cause too much
1818 * redrawing (and possible flickering), if too high responsiveness
1819 * will suffer. */
1820 unsigned long lines = view->height;
1821 int redraw_from = -1;
1823 if (!view->pipe)
1824 return TRUE;
1826 /* Only redraw if lines are visible. */
1827 if (view->offset + view->height >= view->lines)
1828 redraw_from = view->lines - view->offset;
1830 /* FIXME: This is probably not perfect for backgrounded views. */
1831 if (!realloc_lines(view, view->lines + lines))
1832 goto alloc_error;
1834 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1835 size_t linelen = strlen(line);
1837 if (linelen)
1838 line[linelen - 1] = 0;
1840 if (opt_iconv != ICONV_NONE) {
1841 char *inbuf = line;
1842 size_t inlen = linelen;
1844 char *outbuf = out_buffer;
1845 size_t outlen = sizeof(out_buffer);
1847 size_t ret;
1849 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1850 if (ret != (size_t) -1) {
1851 line = out_buffer;
1852 linelen = strlen(out_buffer);
1853 }
1854 }
1856 if (!view->ops->read(view, line))
1857 goto alloc_error;
1859 if (lines-- == 1)
1860 break;
1861 }
1863 {
1864 int digits;
1866 lines = view->lines;
1867 for (digits = 0; lines; digits++)
1868 lines /= 10;
1870 /* Keep the displayed view in sync with line number scaling. */
1871 if (digits != view->digits) {
1872 view->digits = digits;
1873 redraw_from = 0;
1874 }
1875 }
1877 if (!view_is_displayed(view))
1878 goto check_pipe;
1880 if (view == VIEW(REQ_VIEW_TREE)) {
1881 /* Clear the view and redraw everything since the tree sorting
1882 * might have rearranged things. */
1883 redraw_view(view);
1885 } else if (redraw_from >= 0) {
1886 /* If this is an incremental update, redraw the previous line
1887 * since for commits some members could have changed when
1888 * loading the main view. */
1889 if (redraw_from > 0)
1890 redraw_from--;
1892 /* Incrementally draw avoids flickering. */
1893 redraw_view_from(view, redraw_from);
1894 }
1896 /* Update the title _after_ the redraw so that if the redraw picks up a
1897 * commit reference in view->ref it'll be available here. */
1898 update_view_title(view);
1900 check_pipe:
1901 if (ferror(view->pipe)) {
1902 report("Failed to read: %s", strerror(errno));
1903 goto end;
1905 } else if (feof(view->pipe)) {
1906 report("");
1907 goto end;
1908 }
1910 return TRUE;
1912 alloc_error:
1913 report("Allocation failure");
1915 end:
1916 end_update(view);
1917 return FALSE;
1918 }
1921 /*
1922 * View opening
1923 */
1925 static void open_help_view(struct view *view)
1926 {
1927 char buf[BUFSIZ];
1928 int lines = ARRAY_SIZE(req_info) + 2;
1929 int i;
1931 if (view->lines > 0)
1932 return;
1934 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1935 if (!req_info[i].request)
1936 lines++;
1938 view->line = calloc(lines, sizeof(*view->line));
1939 if (!view->line) {
1940 report("Allocation failure");
1941 return;
1942 }
1944 view->ops->read(view, "Quick reference for tig keybindings:");
1946 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1947 char *key;
1949 if (!req_info[i].request) {
1950 view->ops->read(view, "");
1951 view->ops->read(view, req_info[i].help);
1952 continue;
1953 }
1955 key = get_key(req_info[i].request);
1956 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1957 continue;
1959 view->ops->read(view, buf);
1960 }
1961 }
1963 enum open_flags {
1964 OPEN_DEFAULT = 0, /* Use default view switching. */
1965 OPEN_SPLIT = 1, /* Split current view. */
1966 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1967 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1968 };
1970 static void
1971 open_view(struct view *prev, enum request request, enum open_flags flags)
1972 {
1973 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1974 bool split = !!(flags & OPEN_SPLIT);
1975 bool reload = !!(flags & OPEN_RELOAD);
1976 struct view *view = VIEW(request);
1977 int nviews = displayed_views();
1978 struct view *base_view = display[0];
1980 if (view == prev && nviews == 1 && !reload) {
1981 report("Already in %s view", view->name);
1982 return;
1983 }
1985 if (view == VIEW(REQ_VIEW_HELP)) {
1986 open_help_view(view);
1988 } else if ((reload || strcmp(view->vid, view->id)) &&
1989 !begin_update(view)) {
1990 report("Failed to load %s view", view->name);
1991 return;
1992 }
1994 if (split) {
1995 display[1] = view;
1996 if (!backgrounded)
1997 current_view = 1;
1998 } else {
1999 /* Maximize the current view. */
2000 memset(display, 0, sizeof(display));
2001 current_view = 0;
2002 display[current_view] = view;
2003 }
2005 /* Resize the view when switching between split- and full-screen,
2006 * or when switching between two different full-screen views. */
2007 if (nviews != displayed_views() ||
2008 (nviews == 1 && base_view != display[0]))
2009 resize_display();
2011 if (split && prev->lineno - prev->offset >= prev->height) {
2012 /* Take the title line into account. */
2013 int lines = prev->lineno - prev->offset - prev->height + 1;
2015 /* Scroll the view that was split if the current line is
2016 * outside the new limited view. */
2017 do_scroll_view(prev, lines, TRUE);
2018 }
2020 if (prev && view != prev) {
2021 if (split && !backgrounded) {
2022 /* "Blur" the previous view. */
2023 update_view_title(prev);
2024 }
2026 view->parent = prev;
2027 }
2029 if (view->pipe && view->lines == 0) {
2030 /* Clear the old view and let the incremental updating refill
2031 * the screen. */
2032 wclear(view->win);
2033 report("");
2034 } else {
2035 redraw_view(view);
2036 report("");
2037 }
2039 /* If the view is backgrounded the above calls to report()
2040 * won't redraw the view title. */
2041 if (backgrounded)
2042 update_view_title(view);
2043 }
2046 /*
2047 * User request switch noodle
2048 */
2050 static int
2051 view_driver(struct view *view, enum request request)
2052 {
2053 int i;
2055 switch (request) {
2056 case REQ_MOVE_UP:
2057 case REQ_MOVE_DOWN:
2058 case REQ_MOVE_PAGE_UP:
2059 case REQ_MOVE_PAGE_DOWN:
2060 case REQ_MOVE_FIRST_LINE:
2061 case REQ_MOVE_LAST_LINE:
2062 move_view(view, request, TRUE);
2063 break;
2065 case REQ_SCROLL_LINE_DOWN:
2066 case REQ_SCROLL_LINE_UP:
2067 case REQ_SCROLL_PAGE_DOWN:
2068 case REQ_SCROLL_PAGE_UP:
2069 scroll_view(view, request);
2070 break;
2072 case REQ_VIEW_BLOB:
2073 if (!ref_blob[0]) {
2074 report("No file chosen, press 't' to open tree view");
2075 break;
2076 }
2077 /* Fall-through */
2078 case REQ_VIEW_MAIN:
2079 case REQ_VIEW_DIFF:
2080 case REQ_VIEW_LOG:
2081 case REQ_VIEW_TREE:
2082 case REQ_VIEW_HELP:
2083 case REQ_VIEW_PAGER:
2084 open_view(view, request, OPEN_DEFAULT);
2085 break;
2087 case REQ_NEXT:
2088 case REQ_PREVIOUS:
2089 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2091 if ((view == VIEW(REQ_VIEW_DIFF) &&
2092 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2093 (view == VIEW(REQ_VIEW_BLOB) &&
2094 view->parent == VIEW(REQ_VIEW_TREE))) {
2095 bool redraw = display[1] == view;
2097 view = view->parent;
2098 move_view(view, request, redraw);
2099 if (redraw)
2100 update_view_title(view);
2101 } else {
2102 move_view(view, request, TRUE);
2103 break;
2104 }
2105 /* Fall-through */
2107 case REQ_ENTER:
2108 if (!view->lines) {
2109 report("Nothing to enter");
2110 break;
2111 }
2112 return view->ops->enter(view, &view->line[view->lineno]);
2114 case REQ_VIEW_NEXT:
2115 {
2116 int nviews = displayed_views();
2117 int next_view = (current_view + 1) % nviews;
2119 if (next_view == current_view) {
2120 report("Only one view is displayed");
2121 break;
2122 }
2124 current_view = next_view;
2125 /* Blur out the title of the previous view. */
2126 update_view_title(view);
2127 report("");
2128 break;
2129 }
2130 case REQ_TOGGLE_LINENO:
2131 opt_line_number = !opt_line_number;
2132 redraw_display();
2133 break;
2135 case REQ_TOGGLE_REV_GRAPH:
2136 opt_rev_graph = !opt_rev_graph;
2137 redraw_display();
2138 break;
2140 case REQ_PROMPT:
2141 /* Always reload^Wrerun commands from the prompt. */
2142 open_view(view, opt_request, OPEN_RELOAD);
2143 break;
2145 case REQ_SEARCH:
2146 case REQ_SEARCH_BACK:
2147 search_view(view, request);
2148 break;
2150 case REQ_FIND_NEXT:
2151 case REQ_FIND_PREV:
2152 find_next(view, request);
2153 break;
2155 case REQ_STOP_LOADING:
2156 for (i = 0; i < ARRAY_SIZE(views); i++) {
2157 view = &views[i];
2158 if (view->pipe)
2159 report("Stopped loading the %s view", view->name),
2160 end_update(view);
2161 }
2162 break;
2164 case REQ_SHOW_VERSION:
2165 report("%s (built %s)", VERSION, __DATE__);
2166 return TRUE;
2168 case REQ_SCREEN_RESIZE:
2169 resize_display();
2170 /* Fall-through */
2171 case REQ_SCREEN_REDRAW:
2172 redraw_display();
2173 break;
2175 case REQ_NONE:
2176 doupdate();
2177 return TRUE;
2179 case REQ_VIEW_CLOSE:
2180 /* XXX: Mark closed views by letting view->parent point to the
2181 * view itself. Parents to closed view should never be
2182 * followed. */
2183 if (view->parent &&
2184 view->parent->parent != view->parent) {
2185 memset(display, 0, sizeof(display));
2186 current_view = 0;
2187 display[current_view] = view->parent;
2188 view->parent = view;
2189 resize_display();
2190 redraw_display();
2191 break;
2192 }
2193 /* Fall-through */
2194 case REQ_QUIT:
2195 return FALSE;
2197 default:
2198 /* An unknown key will show most commonly used commands. */
2199 report("Unknown key, press 'h' for help");
2200 return TRUE;
2201 }
2203 return TRUE;
2204 }
2207 /*
2208 * Pager backend
2209 */
2211 static bool
2212 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2213 {
2214 char *text = line->data;
2215 enum line_type type = line->type;
2216 int textlen = strlen(text);
2217 int attr;
2219 wmove(view->win, lineno, 0);
2221 if (selected) {
2222 type = LINE_CURSOR;
2223 wchgat(view->win, -1, 0, type, NULL);
2224 }
2226 attr = get_line_attr(type);
2227 wattrset(view->win, attr);
2229 if (opt_line_number || opt_tab_size < TABSIZE) {
2230 static char spaces[] = " ";
2231 int col_offset = 0, col = 0;
2233 if (opt_line_number) {
2234 unsigned long real_lineno = view->offset + lineno + 1;
2236 if (real_lineno == 1 ||
2237 (real_lineno % opt_num_interval) == 0) {
2238 wprintw(view->win, "%.*d", view->digits, real_lineno);
2240 } else {
2241 waddnstr(view->win, spaces,
2242 MIN(view->digits, STRING_SIZE(spaces)));
2243 }
2244 waddstr(view->win, ": ");
2245 col_offset = view->digits + 2;
2246 }
2248 while (text && col_offset + col < view->width) {
2249 int cols_max = view->width - col_offset - col;
2250 char *pos = text;
2251 int cols;
2253 if (*text == '\t') {
2254 text++;
2255 assert(sizeof(spaces) > TABSIZE);
2256 pos = spaces;
2257 cols = opt_tab_size - (col % opt_tab_size);
2259 } else {
2260 text = strchr(text, '\t');
2261 cols = line ? text - pos : strlen(pos);
2262 }
2264 waddnstr(view->win, pos, MIN(cols, cols_max));
2265 col += cols;
2266 }
2268 } else {
2269 int col = 0, pos = 0;
2271 for (; pos < textlen && col < view->width; pos++, col++)
2272 if (text[pos] == '\t')
2273 col += TABSIZE - (col % TABSIZE) - 1;
2275 waddnstr(view->win, text, pos);
2276 }
2278 return TRUE;
2279 }
2281 static bool
2282 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2283 {
2284 char refbuf[SIZEOF_STR];
2285 char *ref = NULL;
2286 FILE *pipe;
2288 if (!string_format(refbuf, "git describe %s", commit_id))
2289 return TRUE;
2291 pipe = popen(refbuf, "r");
2292 if (!pipe)
2293 return TRUE;
2295 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2296 ref = chomp_string(ref);
2297 pclose(pipe);
2299 if (!ref || !*ref)
2300 return TRUE;
2302 /* This is the only fatal call, since it can "corrupt" the buffer. */
2303 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2304 return FALSE;
2306 return TRUE;
2307 }
2309 static void
2310 add_pager_refs(struct view *view, struct line *line)
2311 {
2312 char buf[SIZEOF_STR];
2313 char *commit_id = line->data + STRING_SIZE("commit ");
2314 struct ref **refs;
2315 size_t bufpos = 0, refpos = 0;
2316 const char *sep = "Refs: ";
2317 bool is_tag = FALSE;
2319 assert(line->type == LINE_COMMIT);
2321 refs = get_refs(commit_id);
2322 if (!refs) {
2323 if (view == VIEW(REQ_VIEW_DIFF))
2324 goto try_add_describe_ref;
2325 return;
2326 }
2328 do {
2329 struct ref *ref = refs[refpos];
2330 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2332 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2333 return;
2334 sep = ", ";
2335 if (ref->tag)
2336 is_tag = TRUE;
2337 } while (refs[refpos++]->next);
2339 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2340 try_add_describe_ref:
2341 /* Add <tag>-g<commit_id> "fake" reference. */
2342 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2343 return;
2344 }
2346 if (bufpos == 0)
2347 return;
2349 if (!realloc_lines(view, view->line_size + 1))
2350 return;
2352 line = &view->line[view->lines];
2353 line->data = strdup(buf);
2354 if (!line->data)
2355 return;
2357 line->type = LINE_PP_REFS;
2358 view->lines++;
2359 }
2361 static bool
2362 pager_read(struct view *view, char *data)
2363 {
2364 struct line *line = &view->line[view->lines];
2366 line->data = strdup(data);
2367 if (!line->data)
2368 return FALSE;
2370 line->type = get_line_type(line->data);
2371 view->lines++;
2373 if (line->type == LINE_COMMIT &&
2374 (view == VIEW(REQ_VIEW_DIFF) ||
2375 view == VIEW(REQ_VIEW_LOG)))
2376 add_pager_refs(view, line);
2378 return TRUE;
2379 }
2381 static bool
2382 pager_enter(struct view *view, struct line *line)
2383 {
2384 int split = 0;
2386 if (line->type == LINE_COMMIT &&
2387 (view == VIEW(REQ_VIEW_LOG) ||
2388 view == VIEW(REQ_VIEW_PAGER))) {
2389 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2390 split = 1;
2391 }
2393 /* Always scroll the view even if it was split. That way
2394 * you can use Enter to scroll through the log view and
2395 * split open each commit diff. */
2396 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2398 /* FIXME: A minor workaround. Scrolling the view will call report("")
2399 * but if we are scrolling a non-current view this won't properly
2400 * update the view title. */
2401 if (split)
2402 update_view_title(view);
2404 return TRUE;
2405 }
2407 static bool
2408 pager_grep(struct view *view, struct line *line)
2409 {
2410 regmatch_t pmatch;
2411 char *text = line->data;
2413 if (!*text)
2414 return FALSE;
2416 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2417 return FALSE;
2419 return TRUE;
2420 }
2422 static void
2423 pager_select(struct view *view, struct line *line)
2424 {
2425 if (line->type == LINE_COMMIT) {
2426 char *text = line->data;
2428 string_copy(view->ref, text + STRING_SIZE("commit "));
2429 string_copy(ref_commit, view->ref);
2430 }
2431 }
2433 static struct view_ops pager_ops = {
2434 "line",
2435 pager_draw,
2436 pager_read,
2437 pager_enter,
2438 pager_grep,
2439 pager_select,
2440 };
2443 /*
2444 * Tree backend
2445 */
2447 /* Parse output from git ls-tree:
2448 *
2449 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2450 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2451 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2452 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2453 */
2455 #define SIZEOF_TREE_ATTR \
2456 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2458 #define TREE_UP_FORMAT "040000 tree %s\t.."
2460 static int
2461 tree_compare_entry(enum line_type type1, char *name1,
2462 enum line_type type2, char *name2)
2463 {
2464 if (type1 != type2) {
2465 if (type1 == LINE_TREE_DIR)
2466 return -1;
2467 return 1;
2468 }
2470 return strcmp(name1, name2);
2471 }
2473 static bool
2474 tree_read(struct view *view, char *text)
2475 {
2476 size_t textlen = strlen(text);
2477 char buf[SIZEOF_STR];
2478 unsigned long pos;
2479 enum line_type type;
2480 bool first_read = view->lines == 0;
2482 if (textlen <= SIZEOF_TREE_ATTR)
2483 return FALSE;
2485 type = text[STRING_SIZE("100644 ")] == 't'
2486 ? LINE_TREE_DIR : LINE_TREE_FILE;
2488 if (first_read) {
2489 /* Add path info line */
2490 if (string_format(buf, "Directory path /%s", opt_path) &&
2491 realloc_lines(view, view->line_size + 1) &&
2492 pager_read(view, buf))
2493 view->line[view->lines - 1].type = LINE_DEFAULT;
2494 else
2495 return FALSE;
2497 /* Insert "link" to parent directory. */
2498 if (*opt_path &&
2499 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2500 realloc_lines(view, view->line_size + 1) &&
2501 pager_read(view, buf))
2502 view->line[view->lines - 1].type = LINE_TREE_DIR;
2503 else if (*opt_path)
2504 return FALSE;
2505 }
2507 /* Strip the path part ... */
2508 if (*opt_path) {
2509 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2510 size_t striplen = strlen(opt_path);
2511 char *path = text + SIZEOF_TREE_ATTR;
2513 if (pathlen > striplen)
2514 memmove(path, path + striplen,
2515 pathlen - striplen + 1);
2516 }
2518 /* Skip "Directory ..." and ".." line. */
2519 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2520 struct line *line = &view->line[pos];
2521 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2522 char *path2 = text + SIZEOF_TREE_ATTR;
2523 int cmp = tree_compare_entry(line->type, path1, type, path2);
2525 if (cmp <= 0)
2526 continue;
2528 text = strdup(text);
2529 if (!text)
2530 return FALSE;
2532 if (view->lines > pos)
2533 memmove(&view->line[pos + 1], &view->line[pos],
2534 (view->lines - pos) * sizeof(*line));
2536 line = &view->line[pos];
2537 line->data = text;
2538 line->type = type;
2539 view->lines++;
2540 return TRUE;
2541 }
2543 if (!pager_read(view, text))
2544 return FALSE;
2546 /* Move the current line to the first tree entry. */
2547 if (first_read)
2548 view->lineno++;
2550 view->line[view->lines - 1].type = type;
2551 return TRUE;
2552 }
2554 static bool
2555 tree_enter(struct view *view, struct line *line)
2556 {
2557 enum open_flags flags = OPEN_DEFAULT;
2558 char *data = line->data;
2559 enum request request;
2561 switch (line->type) {
2562 case LINE_TREE_DIR:
2563 /* Depending on whether it is a subdir or parent (updir?) link
2564 * mangle the path buffer. */
2565 if (line == &view->line[1] && *opt_path) {
2566 size_t path_len = strlen(opt_path);
2567 char *dirsep = opt_path + path_len - 1;
2569 while (dirsep > opt_path && dirsep[-1] != '/')
2570 dirsep--;
2572 dirsep[0] = 0;
2574 } else {
2575 size_t pathlen = strlen(opt_path);
2576 size_t origlen = pathlen;
2577 char *basename = data + SIZEOF_TREE_ATTR;
2579 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2580 opt_path[origlen] = 0;
2581 return TRUE;
2582 }
2583 }
2585 /* Trees and subtrees share the same ID, so they are not not
2586 * unique like blobs. */
2587 flags |= OPEN_RELOAD;
2588 request = REQ_VIEW_TREE;
2589 break;
2591 case LINE_TREE_FILE:
2592 /* This causes the blob view to become split, and not having it
2593 * in the tree dir case will make the blob view automatically
2594 * disappear when moving to a different directory. */
2595 flags |= OPEN_SPLIT;
2596 request = REQ_VIEW_BLOB;
2597 break;
2599 default:
2600 return TRUE;
2601 }
2603 open_view(view, request, flags);
2605 if (!VIEW(request)->pipe)
2606 return TRUE;
2608 /* For tree views insert the path to the parent as the first line. */
2609 if (request == REQ_VIEW_BLOB) {
2610 /* Mirror what is showed in the title bar. */
2611 string_ncopy(ref_blob, data + STRING_SIZE("100644 blob "), 40);
2612 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2613 return TRUE;
2614 }
2616 return TRUE;
2617 }
2619 static void
2620 tree_select(struct view *view, struct line *line)
2621 {
2622 if (line->type == LINE_TREE_DIR || line->type == LINE_TREE_FILE) {
2623 char *text = line->data;
2625 string_ncopy(view->ref, text + STRING_SIZE("100644 blob "), 40);
2626 string_copy(ref_blob, view->ref);
2627 }
2628 }
2630 static struct view_ops tree_ops = {
2631 "file",
2632 pager_draw,
2633 tree_read,
2634 tree_enter,
2635 pager_grep,
2636 tree_select,
2637 };
2639 static bool
2640 blob_read(struct view *view, char *line)
2641 {
2642 bool state = pager_read(view, line);
2644 if (state == TRUE)
2645 view->line[view->lines - 1].type = LINE_DEFAULT;
2647 return state;
2648 }
2650 static struct view_ops blob_ops = {
2651 "line",
2652 pager_draw,
2653 blob_read,
2654 pager_enter,
2655 pager_grep,
2656 pager_select,
2657 };
2660 /*
2661 * Main view backend
2662 */
2664 struct commit {
2665 char id[41]; /* SHA1 ID. */
2666 char title[75]; /* First line of the commit message. */
2667 char author[75]; /* Author of the commit. */
2668 struct tm time; /* Date from the author ident. */
2669 struct ref **refs; /* Repository references. */
2670 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2671 size_t graph_size; /* The width of the graph array. */
2672 };
2674 static bool
2675 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2676 {
2677 char buf[DATE_COLS + 1];
2678 struct commit *commit = line->data;
2679 enum line_type type;
2680 int col = 0;
2681 size_t timelen;
2682 size_t authorlen;
2683 int trimmed = 1;
2685 if (!*commit->author)
2686 return FALSE;
2688 wmove(view->win, lineno, col);
2690 if (selected) {
2691 type = LINE_CURSOR;
2692 wattrset(view->win, get_line_attr(type));
2693 wchgat(view->win, -1, 0, type, NULL);
2695 } else {
2696 type = LINE_MAIN_COMMIT;
2697 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2698 }
2700 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2701 waddnstr(view->win, buf, timelen);
2702 waddstr(view->win, " ");
2704 col += DATE_COLS;
2705 wmove(view->win, lineno, col);
2706 if (type != LINE_CURSOR)
2707 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2709 if (opt_utf8) {
2710 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2711 } else {
2712 authorlen = strlen(commit->author);
2713 if (authorlen > AUTHOR_COLS - 2) {
2714 authorlen = AUTHOR_COLS - 2;
2715 trimmed = 1;
2716 }
2717 }
2719 if (trimmed) {
2720 waddnstr(view->win, commit->author, authorlen);
2721 if (type != LINE_CURSOR)
2722 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2723 waddch(view->win, '~');
2724 } else {
2725 waddstr(view->win, commit->author);
2726 }
2728 col += AUTHOR_COLS;
2729 if (type != LINE_CURSOR)
2730 wattrset(view->win, A_NORMAL);
2732 if (opt_rev_graph && commit->graph_size) {
2733 size_t i;
2735 wmove(view->win, lineno, col);
2736 /* Using waddch() instead of waddnstr() ensures that
2737 * they'll be rendered correctly for the cursor line. */
2738 for (i = 0; i < commit->graph_size; i++)
2739 waddch(view->win, commit->graph[i]);
2741 col += commit->graph_size + 1;
2742 }
2744 wmove(view->win, lineno, col);
2746 if (commit->refs) {
2747 size_t i = 0;
2749 do {
2750 if (type == LINE_CURSOR)
2751 ;
2752 else if (commit->refs[i]->tag)
2753 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2754 else
2755 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2756 waddstr(view->win, "[");
2757 waddstr(view->win, commit->refs[i]->name);
2758 waddstr(view->win, "]");
2759 if (type != LINE_CURSOR)
2760 wattrset(view->win, A_NORMAL);
2761 waddstr(view->win, " ");
2762 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2763 } while (commit->refs[i++]->next);
2764 }
2766 if (type != LINE_CURSOR)
2767 wattrset(view->win, get_line_attr(type));
2769 {
2770 int titlelen = strlen(commit->title);
2772 if (col + titlelen > view->width)
2773 titlelen = view->width - col;
2775 waddnstr(view->win, commit->title, titlelen);
2776 }
2778 return TRUE;
2779 }
2781 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2782 static bool
2783 main_read(struct view *view, char *line)
2784 {
2785 enum line_type type = get_line_type(line);
2786 struct commit *commit = view->lines
2787 ? view->line[view->lines - 1].data : NULL;
2789 switch (type) {
2790 case LINE_COMMIT:
2791 commit = calloc(1, sizeof(struct commit));
2792 if (!commit)
2793 return FALSE;
2795 line += STRING_SIZE("commit ");
2797 view->line[view->lines++].data = commit;
2798 string_copy(commit->id, line);
2799 commit->refs = get_refs(commit->id);
2800 commit->graph[commit->graph_size++] = ACS_LTEE;
2801 break;
2803 case LINE_AUTHOR:
2804 {
2805 char *ident = line + STRING_SIZE("author ");
2806 char *end = strchr(ident, '<');
2808 if (!commit)
2809 break;
2811 if (end) {
2812 char *email = end + 1;
2814 for (; end > ident && isspace(end[-1]); end--) ;
2816 if (end == ident && *email) {
2817 ident = email;
2818 end = strchr(ident, '>');
2819 for (; end > ident && isspace(end[-1]); end--) ;
2820 }
2821 *end = 0;
2822 }
2824 /* End is NULL or ident meaning there's no author. */
2825 if (end <= ident)
2826 ident = "Unknown";
2828 string_copy(commit->author, ident);
2830 /* Parse epoch and timezone */
2831 if (end) {
2832 char *secs = strchr(end + 1, '>');
2833 char *zone;
2834 time_t time;
2836 if (!secs || secs[1] != ' ')
2837 break;
2839 secs += 2;
2840 time = (time_t) atol(secs);
2841 zone = strchr(secs, ' ');
2842 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2843 long tz;
2845 zone++;
2846 tz = ('0' - zone[1]) * 60 * 60 * 10;
2847 tz += ('0' - zone[2]) * 60 * 60;
2848 tz += ('0' - zone[3]) * 60;
2849 tz += ('0' - zone[4]) * 60;
2851 if (zone[0] == '-')
2852 tz = -tz;
2854 time -= tz;
2855 }
2856 gmtime_r(&time, &commit->time);
2857 }
2858 break;
2859 }
2860 default:
2861 if (!commit)
2862 break;
2864 /* Fill in the commit title if it has not already been set. */
2865 if (commit->title[0])
2866 break;
2868 /* Require titles to start with a non-space character at the
2869 * offset used by git log. */
2870 /* FIXME: More gracefull handling of titles; append "..." to
2871 * shortened titles, etc. */
2872 if (strncmp(line, " ", 4) ||
2873 isspace(line[4]))
2874 break;
2876 string_copy(commit->title, line + 4);
2877 }
2879 return TRUE;
2880 }
2882 static bool
2883 main_enter(struct view *view, struct line *line)
2884 {
2885 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2887 open_view(view, REQ_VIEW_DIFF, flags);
2888 return TRUE;
2889 }
2891 static bool
2892 main_grep(struct view *view, struct line *line)
2893 {
2894 struct commit *commit = line->data;
2895 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2896 char buf[DATE_COLS + 1];
2897 regmatch_t pmatch;
2899 for (state = S_TITLE; state < S_END; state++) {
2900 char *text;
2902 switch (state) {
2903 case S_TITLE: text = commit->title; break;
2904 case S_AUTHOR: text = commit->author; break;
2905 case S_DATE:
2906 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2907 continue;
2908 text = buf;
2909 break;
2911 default:
2912 return FALSE;
2913 }
2915 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
2916 return TRUE;
2917 }
2919 return FALSE;
2920 }
2922 static void
2923 main_select(struct view *view, struct line *line)
2924 {
2925 struct commit *commit = line->data;
2927 string_copy(view->ref, commit->id);
2928 string_copy(ref_commit, view->ref);
2929 }
2931 static struct view_ops main_ops = {
2932 "commit",
2933 main_draw,
2934 main_read,
2935 main_enter,
2936 main_grep,
2937 main_select,
2938 };
2941 /*
2942 * Unicode / UTF-8 handling
2943 *
2944 * NOTE: Much of the following code for dealing with unicode is derived from
2945 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2946 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2947 */
2949 /* I've (over)annotated a lot of code snippets because I am not entirely
2950 * confident that the approach taken by this small UTF-8 interface is correct.
2951 * --jonas */
2953 static inline int
2954 unicode_width(unsigned long c)
2955 {
2956 if (c >= 0x1100 &&
2957 (c <= 0x115f /* Hangul Jamo */
2958 || c == 0x2329
2959 || c == 0x232a
2960 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2961 /* CJK ... Yi */
2962 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2963 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2964 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2965 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2966 || (c >= 0xffe0 && c <= 0xffe6)
2967 || (c >= 0x20000 && c <= 0x2fffd)
2968 || (c >= 0x30000 && c <= 0x3fffd)))
2969 return 2;
2971 return 1;
2972 }
2974 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2975 * Illegal bytes are set one. */
2976 static const unsigned char utf8_bytes[256] = {
2977 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,
2978 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,
2979 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,
2980 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,
2981 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,
2982 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,
2983 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,
2984 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,
2985 };
2987 /* Decode UTF-8 multi-byte representation into a unicode character. */
2988 static inline unsigned long
2989 utf8_to_unicode(const char *string, size_t length)
2990 {
2991 unsigned long unicode;
2993 switch (length) {
2994 case 1:
2995 unicode = string[0];
2996 break;
2997 case 2:
2998 unicode = (string[0] & 0x1f) << 6;
2999 unicode += (string[1] & 0x3f);
3000 break;
3001 case 3:
3002 unicode = (string[0] & 0x0f) << 12;
3003 unicode += ((string[1] & 0x3f) << 6);
3004 unicode += (string[2] & 0x3f);
3005 break;
3006 case 4:
3007 unicode = (string[0] & 0x0f) << 18;
3008 unicode += ((string[1] & 0x3f) << 12);
3009 unicode += ((string[2] & 0x3f) << 6);
3010 unicode += (string[3] & 0x3f);
3011 break;
3012 case 5:
3013 unicode = (string[0] & 0x0f) << 24;
3014 unicode += ((string[1] & 0x3f) << 18);
3015 unicode += ((string[2] & 0x3f) << 12);
3016 unicode += ((string[3] & 0x3f) << 6);
3017 unicode += (string[4] & 0x3f);
3018 break;
3019 case 6:
3020 unicode = (string[0] & 0x01) << 30;
3021 unicode += ((string[1] & 0x3f) << 24);
3022 unicode += ((string[2] & 0x3f) << 18);
3023 unicode += ((string[3] & 0x3f) << 12);
3024 unicode += ((string[4] & 0x3f) << 6);
3025 unicode += (string[5] & 0x3f);
3026 break;
3027 default:
3028 die("Invalid unicode length");
3029 }
3031 /* Invalid characters could return the special 0xfffd value but NUL
3032 * should be just as good. */
3033 return unicode > 0xffff ? 0 : unicode;
3034 }
3036 /* Calculates how much of string can be shown within the given maximum width
3037 * and sets trimmed parameter to non-zero value if all of string could not be
3038 * shown.
3039 *
3040 * Additionally, adds to coloffset how many many columns to move to align with
3041 * the expected position. Takes into account how multi-byte and double-width
3042 * characters will effect the cursor position.
3043 *
3044 * Returns the number of bytes to output from string to satisfy max_width. */
3045 static size_t
3046 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3047 {
3048 const char *start = string;
3049 const char *end = strchr(string, '\0');
3050 size_t mbwidth = 0;
3051 size_t width = 0;
3053 *trimmed = 0;
3055 while (string < end) {
3056 int c = *(unsigned char *) string;
3057 unsigned char bytes = utf8_bytes[c];
3058 size_t ucwidth;
3059 unsigned long unicode;
3061 if (string + bytes > end)
3062 break;
3064 /* Change representation to figure out whether
3065 * it is a single- or double-width character. */
3067 unicode = utf8_to_unicode(string, bytes);
3068 /* FIXME: Graceful handling of invalid unicode character. */
3069 if (!unicode)
3070 break;
3072 ucwidth = unicode_width(unicode);
3073 width += ucwidth;
3074 if (width > max_width) {
3075 *trimmed = 1;
3076 break;
3077 }
3079 /* The column offset collects the differences between the
3080 * number of bytes encoding a character and the number of
3081 * columns will be used for rendering said character.
3082 *
3083 * So if some character A is encoded in 2 bytes, but will be
3084 * represented on the screen using only 1 byte this will and up
3085 * adding 1 to the multi-byte column offset.
3086 *
3087 * Assumes that no double-width character can be encoding in
3088 * less than two bytes. */
3089 if (bytes > ucwidth)
3090 mbwidth += bytes - ucwidth;
3092 string += bytes;
3093 }
3095 *coloffset += mbwidth;
3097 return string - start;
3098 }
3101 /*
3102 * Status management
3103 */
3105 /* Whether or not the curses interface has been initialized. */
3106 static bool cursed = FALSE;
3108 /* The status window is used for polling keystrokes. */
3109 static WINDOW *status_win;
3111 /* Update status and title window. */
3112 static void
3113 report(const char *msg, ...)
3114 {
3115 static bool empty = TRUE;
3116 struct view *view = display[current_view];
3118 if (!empty || *msg) {
3119 va_list args;
3121 va_start(args, msg);
3123 werase(status_win);
3124 wmove(status_win, 0, 0);
3125 if (*msg) {
3126 vwprintw(status_win, msg, args);
3127 empty = FALSE;
3128 } else {
3129 empty = TRUE;
3130 }
3131 wrefresh(status_win);
3133 va_end(args);
3134 }
3136 update_view_title(view);
3137 update_display_cursor();
3138 }
3140 /* Controls when nodelay should be in effect when polling user input. */
3141 static void
3142 set_nonblocking_input(bool loading)
3143 {
3144 static unsigned int loading_views;
3146 if ((loading == FALSE && loading_views-- == 1) ||
3147 (loading == TRUE && loading_views++ == 0))
3148 nodelay(status_win, loading);
3149 }
3151 static void
3152 init_display(void)
3153 {
3154 int x, y;
3156 /* Initialize the curses library */
3157 if (isatty(STDIN_FILENO)) {
3158 cursed = !!initscr();
3159 } else {
3160 /* Leave stdin and stdout alone when acting as a pager. */
3161 FILE *io = fopen("/dev/tty", "r+");
3163 if (!io)
3164 die("Failed to open /dev/tty");
3165 cursed = !!newterm(NULL, io, io);
3166 }
3168 if (!cursed)
3169 die("Failed to initialize curses");
3171 nonl(); /* Tell curses not to do NL->CR/NL on output */
3172 cbreak(); /* Take input chars one at a time, no wait for \n */
3173 noecho(); /* Don't echo input */
3174 leaveok(stdscr, TRUE);
3176 if (has_colors())
3177 init_colors();
3179 getmaxyx(stdscr, y, x);
3180 status_win = newwin(1, 0, y - 1, 0);
3181 if (!status_win)
3182 die("Failed to create status window");
3184 /* Enable keyboard mapping */
3185 keypad(status_win, TRUE);
3186 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3187 }
3189 static char *
3190 read_prompt(const char *prompt)
3191 {
3192 enum { READING, STOP, CANCEL } status = READING;
3193 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3194 int pos = 0;
3196 while (status == READING) {
3197 struct view *view;
3198 int i, key;
3200 foreach_view (view, i)
3201 update_view(view);
3203 report("%s%.*s", prompt, pos, buf);
3204 /* Refresh, accept single keystroke of input */
3205 key = wgetch(status_win);
3206 switch (key) {
3207 case KEY_RETURN:
3208 case KEY_ENTER:
3209 case '\n':
3210 status = pos ? STOP : CANCEL;
3211 break;
3213 case KEY_BACKSPACE:
3214 if (pos > 0)
3215 pos--;
3216 else
3217 status = CANCEL;
3218 break;
3220 case KEY_ESC:
3221 status = CANCEL;
3222 break;
3224 case ERR:
3225 break;
3227 default:
3228 if (pos >= sizeof(buf)) {
3229 report("Input string too long");
3230 return NULL;
3231 }
3233 if (isprint(key))
3234 buf[pos++] = (char) key;
3235 }
3236 }
3238 if (status == CANCEL) {
3239 /* Clear the status window */
3240 report("");
3241 return NULL;
3242 }
3244 buf[pos++] = 0;
3246 return buf;
3247 }
3249 /*
3250 * Repository references
3251 */
3253 static struct ref *refs;
3254 static size_t refs_size;
3256 /* Id <-> ref store */
3257 static struct ref ***id_refs;
3258 static size_t id_refs_size;
3260 static struct ref **
3261 get_refs(char *id)
3262 {
3263 struct ref ***tmp_id_refs;
3264 struct ref **ref_list = NULL;
3265 size_t ref_list_size = 0;
3266 size_t i;
3268 for (i = 0; i < id_refs_size; i++)
3269 if (!strcmp(id, id_refs[i][0]->id))
3270 return id_refs[i];
3272 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3273 if (!tmp_id_refs)
3274 return NULL;
3276 id_refs = tmp_id_refs;
3278 for (i = 0; i < refs_size; i++) {
3279 struct ref **tmp;
3281 if (strcmp(id, refs[i].id))
3282 continue;
3284 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3285 if (!tmp) {
3286 if (ref_list)
3287 free(ref_list);
3288 return NULL;
3289 }
3291 ref_list = tmp;
3292 if (ref_list_size > 0)
3293 ref_list[ref_list_size - 1]->next = 1;
3294 ref_list[ref_list_size] = &refs[i];
3296 /* XXX: The properties of the commit chains ensures that we can
3297 * safely modify the shared ref. The repo references will
3298 * always be similar for the same id. */
3299 ref_list[ref_list_size]->next = 0;
3300 ref_list_size++;
3301 }
3303 if (ref_list)
3304 id_refs[id_refs_size++] = ref_list;
3306 return ref_list;
3307 }
3309 static int
3310 read_ref(char *id, int idlen, char *name, int namelen)
3311 {
3312 struct ref *ref;
3313 bool tag = FALSE;
3315 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3316 /* Commits referenced by tags has "^{}" appended. */
3317 if (name[namelen - 1] != '}')
3318 return OK;
3320 while (namelen > 0 && name[namelen] != '^')
3321 namelen--;
3323 tag = TRUE;
3324 namelen -= STRING_SIZE("refs/tags/");
3325 name += STRING_SIZE("refs/tags/");
3327 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3328 namelen -= STRING_SIZE("refs/heads/");
3329 name += STRING_SIZE("refs/heads/");
3331 } else if (!strcmp(name, "HEAD")) {
3332 return OK;
3333 }
3335 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3336 if (!refs)
3337 return ERR;
3339 ref = &refs[refs_size++];
3340 ref->name = malloc(namelen + 1);
3341 if (!ref->name)
3342 return ERR;
3344 strncpy(ref->name, name, namelen);
3345 ref->name[namelen] = 0;
3346 ref->tag = tag;
3347 string_copy(ref->id, id);
3349 return OK;
3350 }
3352 static int
3353 load_refs(void)
3354 {
3355 const char *cmd_env = getenv("TIG_LS_REMOTE");
3356 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3358 return read_properties(popen(cmd, "r"), "\t", read_ref);
3359 }
3361 static int
3362 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3363 {
3364 if (!strcmp(name, "i18n.commitencoding"))
3365 string_copy(opt_encoding, value);
3367 return OK;
3368 }
3370 static int
3371 load_repo_config(void)
3372 {
3373 return read_properties(popen("git repo-config --list", "r"),
3374 "=", read_repo_config_option);
3375 }
3377 static int
3378 read_properties(FILE *pipe, const char *separators,
3379 int (*read_property)(char *, int, char *, int))
3380 {
3381 char buffer[BUFSIZ];
3382 char *name;
3383 int state = OK;
3385 if (!pipe)
3386 return ERR;
3388 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3389 char *value;
3390 size_t namelen;
3391 size_t valuelen;
3393 name = chomp_string(name);
3394 namelen = strcspn(name, separators);
3396 if (name[namelen]) {
3397 name[namelen] = 0;
3398 value = chomp_string(name + namelen + 1);
3399 valuelen = strlen(value);
3401 } else {
3402 value = "";
3403 valuelen = 0;
3404 }
3406 state = read_property(name, namelen, value, valuelen);
3407 }
3409 if (state != ERR && ferror(pipe))
3410 state = ERR;
3412 pclose(pipe);
3414 return state;
3415 }
3418 /*
3419 * Main
3420 */
3422 static void __NORETURN
3423 quit(int sig)
3424 {
3425 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3426 if (cursed)
3427 endwin();
3428 exit(0);
3429 }
3431 static void __NORETURN
3432 die(const char *err, ...)
3433 {
3434 va_list args;
3436 endwin();
3438 va_start(args, err);
3439 fputs("tig: ", stderr);
3440 vfprintf(stderr, err, args);
3441 fputs("\n", stderr);
3442 va_end(args);
3444 exit(1);
3445 }
3447 int
3448 main(int argc, char *argv[])
3449 {
3450 struct view *view;
3451 enum request request;
3452 size_t i;
3454 signal(SIGINT, quit);
3456 if (setlocale(LC_ALL, "")) {
3457 string_copy(opt_codeset, nl_langinfo(CODESET));
3458 }
3460 if (load_options() == ERR)
3461 die("Failed to load user config.");
3463 /* Load the repo config file so options can be overwritten from
3464 * the command line. */
3465 if (load_repo_config() == ERR)
3466 die("Failed to load repo config.");
3468 if (!parse_options(argc, argv))
3469 return 0;
3471 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3472 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3473 if (opt_iconv == ICONV_NONE)
3474 die("Failed to initialize character set conversion");
3475 }
3477 if (load_refs() == ERR)
3478 die("Failed to load refs.");
3480 /* Require a git repository unless when running in pager mode. */
3481 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3482 die("Not a git repository");
3484 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3485 view->cmd_env = getenv(view->cmd_env);
3487 request = opt_request;
3489 init_display();
3491 while (view_driver(display[current_view], request)) {
3492 int key;
3493 int i;
3495 foreach_view (view, i)
3496 update_view(view);
3498 /* Refresh, accept single keystroke of input */
3499 key = wgetch(status_win);
3501 request = get_keybinding(display[current_view]->keymap, key);
3503 /* Some low-level request handling. This keeps access to
3504 * status_win restricted. */
3505 switch (request) {
3506 case REQ_PROMPT:
3507 {
3508 char *cmd = read_prompt(":");
3510 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3511 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3512 opt_request = REQ_VIEW_DIFF;
3513 } else {
3514 opt_request = REQ_VIEW_PAGER;
3515 }
3516 break;
3517 }
3519 request = REQ_NONE;
3520 break;
3521 }
3522 case REQ_SEARCH:
3523 case REQ_SEARCH_BACK:
3524 {
3525 const char *prompt = request == REQ_SEARCH
3526 ? "/" : "?";
3527 char *search = read_prompt(prompt);
3529 if (search)
3530 string_copy(opt_search, search);
3531 else
3532 request = REQ_NONE;
3533 break;
3534 }
3535 case REQ_SCREEN_RESIZE:
3536 {
3537 int height, width;
3539 getmaxyx(stdscr, height, width);
3541 /* Resize the status view and let the view driver take
3542 * care of resizing the displayed views. */
3543 wresize(status_win, 1, width);
3544 mvwin(status_win, height - 1, 0);
3545 wrefresh(status_win);
3546 break;
3547 }
3548 default:
3549 break;
3550 }
3551 }
3553 quit(0);
3555 return 0;
3556 }