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1 /* Copyright (c) 2006-2009 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 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
26 #include <assert.h>
27 #include <errno.h>
28 #include <ctype.h>
29 #include <signal.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <sys/stat.h>
37 #include <sys/select.h>
38 #include <unistd.h>
39 #include <time.h>
40 #include <fcntl.h>
42 #include <regex.h>
44 #include <locale.h>
45 #include <langinfo.h>
46 #include <iconv.h>
48 /* ncurses(3): Must be defined to have extended wide-character functions. */
49 #define _XOPEN_SOURCE_EXTENDED
51 #ifdef HAVE_NCURSESW_NCURSES_H
52 #include <ncursesw/ncurses.h>
53 #else
54 #ifdef HAVE_NCURSES_NCURSES_H
55 #include <ncurses/ncurses.h>
56 #else
57 #include <ncurses.h>
58 #endif
59 #endif
61 #if __GNUC__ >= 3
62 #define __NORETURN __attribute__((__noreturn__))
63 #else
64 #define __NORETURN
65 #endif
67 static void __NORETURN die(const char *err, ...);
68 static void warn(const char *msg, ...);
69 static void report(const char *msg, ...);
70 static void set_nonblocking_input(bool loading);
71 static size_t utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve);
72 static int load_refs(void);
74 #define ABS(x) ((x) >= 0 ? (x) : -(x))
75 #define MIN(x, y) ((x) < (y) ? (x) : (y))
77 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
78 #define STRING_SIZE(x) (sizeof(x) - 1)
80 #define SIZEOF_STR 1024 /* Default string size. */
81 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
82 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL. */
83 #define SIZEOF_ARG 32 /* Default argument array size. */
85 /* Revision graph */
87 #define REVGRAPH_INIT 'I'
88 #define REVGRAPH_MERGE 'M'
89 #define REVGRAPH_BRANCH '+'
90 #define REVGRAPH_COMMIT '*'
91 #define REVGRAPH_BOUND '^'
93 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
95 /* This color name can be used to refer to the default term colors. */
96 #define COLOR_DEFAULT (-1)
98 #define ICONV_NONE ((iconv_t) -1)
99 #ifndef ICONV_CONST
100 #define ICONV_CONST /* nothing */
101 #endif
103 /* The format and size of the date column in the main view. */
104 #define DATE_FORMAT "%Y-%m-%d %H:%M"
105 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
107 #define AUTHOR_COLS 20
108 #define ID_COLS 8
110 /* The default interval between line numbers. */
111 #define NUMBER_INTERVAL 5
113 #define TAB_SIZE 8
115 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
117 #define NULL_ID "0000000000000000000000000000000000000000"
119 #ifndef GIT_CONFIG
120 #define GIT_CONFIG "config"
121 #endif
123 /* Some ascii-shorthands fitted into the ncurses namespace. */
124 #define KEY_TAB '\t'
125 #define KEY_RETURN '\r'
126 #define KEY_ESC 27
129 struct ref {
130 char *name; /* Ref name; tag or head names are shortened. */
131 char id[SIZEOF_REV]; /* Commit SHA1 ID */
132 unsigned int head:1; /* Is it the current HEAD? */
133 unsigned int tag:1; /* Is it a tag? */
134 unsigned int ltag:1; /* If so, is the tag local? */
135 unsigned int remote:1; /* Is it a remote ref? */
136 unsigned int tracked:1; /* Is it the remote for the current HEAD? */
137 unsigned int next:1; /* For ref lists: are there more refs? */
138 };
140 static struct ref **get_refs(const char *id);
142 enum format_flags {
143 FORMAT_ALL, /* Perform replacement in all arguments. */
144 FORMAT_DASH, /* Perform replacement up until "--". */
145 FORMAT_NONE /* No replacement should be performed. */
146 };
148 static bool format_argv(const char *dst[], const char *src[], enum format_flags flags);
150 struct int_map {
151 const char *name;
152 int namelen;
153 int value;
154 };
156 static int
157 set_from_int_map(struct int_map *map, size_t map_size,
158 int *value, const char *name, int namelen)
159 {
161 int i;
163 for (i = 0; i < map_size; i++)
164 if (namelen == map[i].namelen &&
165 !strncasecmp(name, map[i].name, namelen)) {
166 *value = map[i].value;
167 return OK;
168 }
170 return ERR;
171 }
173 enum input_status {
174 INPUT_OK,
175 INPUT_SKIP,
176 INPUT_STOP,
177 INPUT_CANCEL
178 };
180 typedef enum input_status (*input_handler)(void *data, char *buf, int c);
182 static char *prompt_input(const char *prompt, input_handler handler, void *data);
183 static bool prompt_yesno(const char *prompt);
185 /*
186 * String helpers
187 */
189 static inline void
190 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
191 {
192 if (srclen > dstlen - 1)
193 srclen = dstlen - 1;
195 strncpy(dst, src, srclen);
196 dst[srclen] = 0;
197 }
199 /* Shorthands for safely copying into a fixed buffer. */
201 #define string_copy(dst, src) \
202 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
204 #define string_ncopy(dst, src, srclen) \
205 string_ncopy_do(dst, sizeof(dst), src, srclen)
207 #define string_copy_rev(dst, src) \
208 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
210 #define string_add(dst, from, src) \
211 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
213 static char *
214 chomp_string(char *name)
215 {
216 int namelen;
218 while (isspace(*name))
219 name++;
221 namelen = strlen(name) - 1;
222 while (namelen > 0 && isspace(name[namelen]))
223 name[namelen--] = 0;
225 return name;
226 }
228 static bool
229 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
230 {
231 va_list args;
232 size_t pos = bufpos ? *bufpos : 0;
234 va_start(args, fmt);
235 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
236 va_end(args);
238 if (bufpos)
239 *bufpos = pos;
241 return pos >= bufsize ? FALSE : TRUE;
242 }
244 #define string_format(buf, fmt, args...) \
245 string_nformat(buf, sizeof(buf), NULL, fmt, args)
247 #define string_format_from(buf, from, fmt, args...) \
248 string_nformat(buf, sizeof(buf), from, fmt, args)
250 static int
251 string_enum_compare(const char *str1, const char *str2, int len)
252 {
253 size_t i;
255 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
257 /* Diff-Header == DIFF_HEADER */
258 for (i = 0; i < len; i++) {
259 if (toupper(str1[i]) == toupper(str2[i]))
260 continue;
262 if (string_enum_sep(str1[i]) &&
263 string_enum_sep(str2[i]))
264 continue;
266 return str1[i] - str2[i];
267 }
269 return 0;
270 }
272 #define prefixcmp(str1, str2) \
273 strncmp(str1, str2, STRING_SIZE(str2))
275 static inline int
276 suffixcmp(const char *str, int slen, const char *suffix)
277 {
278 size_t len = slen >= 0 ? slen : strlen(str);
279 size_t suffixlen = strlen(suffix);
281 return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
282 }
285 static bool
286 argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
287 {
288 int valuelen;
290 while (*cmd && *argc < SIZEOF_ARG && (valuelen = strcspn(cmd, " \t"))) {
291 bool advance = cmd[valuelen] != 0;
293 cmd[valuelen] = 0;
294 argv[(*argc)++] = chomp_string(cmd);
295 cmd = chomp_string(cmd + valuelen + advance);
296 }
298 if (*argc < SIZEOF_ARG)
299 argv[*argc] = NULL;
300 return *argc < SIZEOF_ARG;
301 }
303 static void
304 argv_from_env(const char **argv, const char *name)
305 {
306 char *env = argv ? getenv(name) : NULL;
307 int argc = 0;
309 if (env && *env)
310 env = strdup(env);
311 if (env && !argv_from_string(argv, &argc, env))
312 die("Too many arguments in the `%s` environment variable", name);
313 }
316 /*
317 * Executing external commands.
318 */
320 enum io_type {
321 IO_FD, /* File descriptor based IO. */
322 IO_BG, /* Execute command in the background. */
323 IO_FG, /* Execute command with same std{in,out,err}. */
324 IO_RD, /* Read only fork+exec IO. */
325 IO_WR, /* Write only fork+exec IO. */
326 IO_AP, /* Append fork+exec output to file. */
327 };
329 struct io {
330 enum io_type type; /* The requested type of pipe. */
331 const char *dir; /* Directory from which to execute. */
332 pid_t pid; /* Pipe for reading or writing. */
333 int pipe; /* Pipe end for reading or writing. */
334 int error; /* Error status. */
335 const char *argv[SIZEOF_ARG]; /* Shell command arguments. */
336 char *buf; /* Read buffer. */
337 size_t bufalloc; /* Allocated buffer size. */
338 size_t bufsize; /* Buffer content size. */
339 char *bufpos; /* Current buffer position. */
340 unsigned int eof:1; /* Has end of file been reached. */
341 };
343 static void
344 reset_io(struct io *io)
345 {
346 io->pipe = -1;
347 io->pid = 0;
348 io->buf = io->bufpos = NULL;
349 io->bufalloc = io->bufsize = 0;
350 io->error = 0;
351 io->eof = 0;
352 }
354 static void
355 init_io(struct io *io, const char *dir, enum io_type type)
356 {
357 reset_io(io);
358 io->type = type;
359 io->dir = dir;
360 }
362 static bool
363 init_io_rd(struct io *io, const char *argv[], const char *dir,
364 enum format_flags flags)
365 {
366 init_io(io, dir, IO_RD);
367 return format_argv(io->argv, argv, flags);
368 }
370 static bool
371 io_open(struct io *io, const char *name)
372 {
373 init_io(io, NULL, IO_FD);
374 io->pipe = *name ? open(name, O_RDONLY) : STDIN_FILENO;
375 return io->pipe != -1;
376 }
378 static bool
379 kill_io(struct io *io)
380 {
381 return io->pid == 0 || kill(io->pid, SIGKILL) != -1;
382 }
384 static bool
385 done_io(struct io *io)
386 {
387 pid_t pid = io->pid;
389 if (io->pipe != -1)
390 close(io->pipe);
391 free(io->buf);
392 reset_io(io);
394 while (pid > 0) {
395 int status;
396 pid_t waiting = waitpid(pid, &status, 0);
398 if (waiting < 0) {
399 if (errno == EINTR)
400 continue;
401 report("waitpid failed (%s)", strerror(errno));
402 return FALSE;
403 }
405 return waiting == pid &&
406 !WIFSIGNALED(status) &&
407 WIFEXITED(status) &&
408 !WEXITSTATUS(status);
409 }
411 return TRUE;
412 }
414 static bool
415 start_io(struct io *io)
416 {
417 int pipefds[2] = { -1, -1 };
419 if (io->type == IO_FD)
420 return TRUE;
422 if ((io->type == IO_RD || io->type == IO_WR) &&
423 pipe(pipefds) < 0)
424 return FALSE;
425 else if (io->type == IO_AP)
426 pipefds[1] = io->pipe;
428 if ((io->pid = fork())) {
429 if (pipefds[!(io->type == IO_WR)] != -1)
430 close(pipefds[!(io->type == IO_WR)]);
431 if (io->pid != -1) {
432 io->pipe = pipefds[!!(io->type == IO_WR)];
433 return TRUE;
434 }
436 } else {
437 if (io->type != IO_FG) {
438 int devnull = open("/dev/null", O_RDWR);
439 int readfd = io->type == IO_WR ? pipefds[0] : devnull;
440 int writefd = (io->type == IO_RD || io->type == IO_AP)
441 ? pipefds[1] : devnull;
443 dup2(readfd, STDIN_FILENO);
444 dup2(writefd, STDOUT_FILENO);
445 dup2(devnull, STDERR_FILENO);
447 close(devnull);
448 if (pipefds[0] != -1)
449 close(pipefds[0]);
450 if (pipefds[1] != -1)
451 close(pipefds[1]);
452 }
454 if (io->dir && *io->dir && chdir(io->dir) == -1)
455 die("Failed to change directory: %s", strerror(errno));
457 execvp(io->argv[0], (char *const*) io->argv);
458 die("Failed to execute program: %s", strerror(errno));
459 }
461 if (pipefds[!!(io->type == IO_WR)] != -1)
462 close(pipefds[!!(io->type == IO_WR)]);
463 return FALSE;
464 }
466 static bool
467 run_io(struct io *io, const char **argv, const char *dir, enum io_type type)
468 {
469 init_io(io, dir, type);
470 if (!format_argv(io->argv, argv, FORMAT_NONE))
471 return FALSE;
472 return start_io(io);
473 }
475 static int
476 run_io_do(struct io *io)
477 {
478 return start_io(io) && done_io(io);
479 }
481 static int
482 run_io_bg(const char **argv)
483 {
484 struct io io = {};
486 init_io(&io, NULL, IO_BG);
487 if (!format_argv(io.argv, argv, FORMAT_NONE))
488 return FALSE;
489 return run_io_do(&io);
490 }
492 static bool
493 run_io_fg(const char **argv, const char *dir)
494 {
495 struct io io = {};
497 init_io(&io, dir, IO_FG);
498 if (!format_argv(io.argv, argv, FORMAT_NONE))
499 return FALSE;
500 return run_io_do(&io);
501 }
503 static bool
504 run_io_append(const char **argv, enum format_flags flags, int fd)
505 {
506 struct io io = {};
508 init_io(&io, NULL, IO_AP);
509 io.pipe = fd;
510 if (format_argv(io.argv, argv, flags))
511 return run_io_do(&io);
512 close(fd);
513 return FALSE;
514 }
516 static bool
517 run_io_rd(struct io *io, const char **argv, enum format_flags flags)
518 {
519 return init_io_rd(io, argv, NULL, flags) && start_io(io);
520 }
522 static bool
523 io_eof(struct io *io)
524 {
525 return io->eof;
526 }
528 static int
529 io_error(struct io *io)
530 {
531 return io->error;
532 }
534 static bool
535 io_strerror(struct io *io)
536 {
537 return strerror(io->error);
538 }
540 static bool
541 io_can_read(struct io *io)
542 {
543 struct timeval tv = { 0, 500 };
544 fd_set fds;
546 FD_ZERO(&fds);
547 FD_SET(io->pipe, &fds);
549 return select(io->pipe + 1, &fds, NULL, NULL, &tv) > 0;
550 }
552 static ssize_t
553 io_read(struct io *io, void *buf, size_t bufsize)
554 {
555 do {
556 ssize_t readsize = read(io->pipe, buf, bufsize);
558 if (readsize < 0 && (errno == EAGAIN || errno == EINTR))
559 continue;
560 else if (readsize == -1)
561 io->error = errno;
562 else if (readsize == 0)
563 io->eof = 1;
564 return readsize;
565 } while (1);
566 }
568 static char *
569 io_get(struct io *io, int c, bool can_read)
570 {
571 char *eol;
572 ssize_t readsize;
574 if (!io->buf) {
575 io->buf = io->bufpos = malloc(BUFSIZ);
576 if (!io->buf)
577 return NULL;
578 io->bufalloc = BUFSIZ;
579 io->bufsize = 0;
580 }
582 while (TRUE) {
583 if (io->bufsize > 0) {
584 eol = memchr(io->bufpos, c, io->bufsize);
585 if (eol) {
586 char *line = io->bufpos;
588 *eol = 0;
589 io->bufpos = eol + 1;
590 io->bufsize -= io->bufpos - line;
591 return line;
592 }
593 }
595 if (io_eof(io)) {
596 if (io->bufsize) {
597 io->bufpos[io->bufsize] = 0;
598 io->bufsize = 0;
599 return io->bufpos;
600 }
601 return NULL;
602 }
604 if (!can_read)
605 return NULL;
607 if (io->bufsize > 0 && io->bufpos > io->buf)
608 memmove(io->buf, io->bufpos, io->bufsize);
610 io->bufpos = io->buf;
611 readsize = io_read(io, io->buf + io->bufsize, io->bufalloc - io->bufsize);
612 if (io_error(io))
613 return NULL;
614 io->bufsize += readsize;
615 }
616 }
618 static bool
619 io_write(struct io *io, const void *buf, size_t bufsize)
620 {
621 size_t written = 0;
623 while (!io_error(io) && written < bufsize) {
624 ssize_t size;
626 size = write(io->pipe, buf + written, bufsize - written);
627 if (size < 0 && (errno == EAGAIN || errno == EINTR))
628 continue;
629 else if (size == -1)
630 io->error = errno;
631 else
632 written += size;
633 }
635 return written == bufsize;
636 }
638 static bool
639 run_io_buf(const char **argv, char buf[], size_t bufsize)
640 {
641 struct io io = {};
642 bool error;
644 if (!run_io_rd(&io, argv, FORMAT_NONE))
645 return FALSE;
647 io.buf = io.bufpos = buf;
648 io.bufalloc = bufsize;
649 error = !io_get(&io, '\n', TRUE) && io_error(&io);
650 io.buf = NULL;
652 return done_io(&io) || error;
653 }
655 static int read_properties(struct io *io, const char *separators, int (*read)(char *, size_t, char *, size_t));
657 /*
658 * User requests
659 */
661 #define REQ_INFO \
662 /* XXX: Keep the view request first and in sync with views[]. */ \
663 REQ_GROUP("View switching") \
664 REQ_(VIEW_MAIN, "Show main view"), \
665 REQ_(VIEW_DIFF, "Show diff view"), \
666 REQ_(VIEW_LOG, "Show log view"), \
667 REQ_(VIEW_TREE, "Show tree view"), \
668 REQ_(VIEW_BLOB, "Show blob view"), \
669 REQ_(VIEW_BLAME, "Show blame view"), \
670 REQ_(VIEW_HELP, "Show help page"), \
671 REQ_(VIEW_PAGER, "Show pager view"), \
672 REQ_(VIEW_STATUS, "Show status view"), \
673 REQ_(VIEW_STAGE, "Show stage view"), \
674 \
675 REQ_GROUP("View manipulation") \
676 REQ_(ENTER, "Enter current line and scroll"), \
677 REQ_(NEXT, "Move to next"), \
678 REQ_(PREVIOUS, "Move to previous"), \
679 REQ_(PARENT, "Move to parent"), \
680 REQ_(VIEW_NEXT, "Move focus to next view"), \
681 REQ_(REFRESH, "Reload and refresh"), \
682 REQ_(MAXIMIZE, "Maximize the current view"), \
683 REQ_(VIEW_CLOSE, "Close the current view"), \
684 REQ_(QUIT, "Close all views and quit"), \
685 \
686 REQ_GROUP("View specific requests") \
687 REQ_(STATUS_UPDATE, "Update file status"), \
688 REQ_(STATUS_REVERT, "Revert file changes"), \
689 REQ_(STATUS_MERGE, "Merge file using external tool"), \
690 REQ_(STAGE_NEXT, "Find next chunk to stage"), \
691 \
692 REQ_GROUP("Cursor navigation") \
693 REQ_(MOVE_UP, "Move cursor one line up"), \
694 REQ_(MOVE_DOWN, "Move cursor one line down"), \
695 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
696 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
697 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
698 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
699 \
700 REQ_GROUP("Scrolling") \
701 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
702 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
703 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
704 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
705 \
706 REQ_GROUP("Searching") \
707 REQ_(SEARCH, "Search the view"), \
708 REQ_(SEARCH_BACK, "Search backwards in the view"), \
709 REQ_(FIND_NEXT, "Find next search match"), \
710 REQ_(FIND_PREV, "Find previous search match"), \
711 \
712 REQ_GROUP("Option manipulation") \
713 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
714 REQ_(TOGGLE_DATE, "Toggle date display"), \
715 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
716 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
717 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
718 \
719 REQ_GROUP("Misc") \
720 REQ_(PROMPT, "Bring up the prompt"), \
721 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
722 REQ_(SHOW_VERSION, "Show version information"), \
723 REQ_(STOP_LOADING, "Stop all loading views"), \
724 REQ_(EDIT, "Open in editor"), \
725 REQ_(NONE, "Do nothing")
728 /* User action requests. */
729 enum request {
730 #define REQ_GROUP(help)
731 #define REQ_(req, help) REQ_##req
733 /* Offset all requests to avoid conflicts with ncurses getch values. */
734 REQ_OFFSET = KEY_MAX + 1,
735 REQ_INFO
737 #undef REQ_GROUP
738 #undef REQ_
739 };
741 struct request_info {
742 enum request request;
743 const char *name;
744 int namelen;
745 const char *help;
746 };
748 static struct request_info req_info[] = {
749 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
750 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
751 REQ_INFO
752 #undef REQ_GROUP
753 #undef REQ_
754 };
756 static enum request
757 get_request(const char *name)
758 {
759 int namelen = strlen(name);
760 int i;
762 for (i = 0; i < ARRAY_SIZE(req_info); i++)
763 if (req_info[i].namelen == namelen &&
764 !string_enum_compare(req_info[i].name, name, namelen))
765 return req_info[i].request;
767 return REQ_NONE;
768 }
771 /*
772 * Options
773 */
775 static const char usage[] =
776 "tig " TIG_VERSION " (" __DATE__ ")\n"
777 "\n"
778 "Usage: tig [options] [revs] [--] [paths]\n"
779 " or: tig show [options] [revs] [--] [paths]\n"
780 " or: tig blame [rev] path\n"
781 " or: tig status\n"
782 " or: tig < [git command output]\n"
783 "\n"
784 "Options:\n"
785 " -v, --version Show version and exit\n"
786 " -h, --help Show help message and exit";
788 /* Option and state variables. */
789 static bool opt_date = TRUE;
790 static bool opt_author = TRUE;
791 static bool opt_line_number = FALSE;
792 static bool opt_line_graphics = TRUE;
793 static bool opt_rev_graph = FALSE;
794 static bool opt_show_refs = TRUE;
795 static int opt_num_interval = NUMBER_INTERVAL;
796 static int opt_tab_size = TAB_SIZE;
797 static int opt_author_cols = AUTHOR_COLS-1;
798 static char opt_path[SIZEOF_STR] = "";
799 static char opt_file[SIZEOF_STR] = "";
800 static char opt_ref[SIZEOF_REF] = "";
801 static char opt_head[SIZEOF_REF] = "";
802 static char opt_head_rev[SIZEOF_REV] = "";
803 static char opt_remote[SIZEOF_REF] = "";
804 static char opt_encoding[20] = "UTF-8";
805 static bool opt_utf8 = TRUE;
806 static char opt_codeset[20] = "UTF-8";
807 static iconv_t opt_iconv = ICONV_NONE;
808 static char opt_search[SIZEOF_STR] = "";
809 static char opt_cdup[SIZEOF_STR] = "";
810 static char opt_prefix[SIZEOF_STR] = "";
811 static char opt_git_dir[SIZEOF_STR] = "";
812 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
813 static char opt_editor[SIZEOF_STR] = "";
814 static FILE *opt_tty = NULL;
816 #define is_initial_commit() (!*opt_head_rev)
817 #define is_head_commit(rev) (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
819 static enum request
820 parse_options(int argc, const char *argv[], const char ***run_argv)
821 {
822 enum request request = REQ_VIEW_MAIN;
823 const char *subcommand;
824 bool seen_dashdash = FALSE;
825 /* XXX: This is vulnerable to the user overriding options
826 * required for the main view parser. */
827 static const char *custom_argv[SIZEOF_ARG] = {
828 "git", "log", "--no-color", "--pretty=raw", "--parents",
829 "--topo-order", NULL
830 };
831 int i, j = 6;
833 if (!isatty(STDIN_FILENO))
834 return REQ_VIEW_PAGER;
836 if (argc <= 1)
837 return REQ_VIEW_MAIN;
839 subcommand = argv[1];
840 if (!strcmp(subcommand, "status") || !strcmp(subcommand, "-S")) {
841 if (!strcmp(subcommand, "-S"))
842 warn("`-S' has been deprecated; use `tig status' instead");
843 if (argc > 2)
844 warn("ignoring arguments after `%s'", subcommand);
845 return REQ_VIEW_STATUS;
847 } else if (!strcmp(subcommand, "blame")) {
848 if (argc <= 2 || argc > 4)
849 die("invalid number of options to blame\n\n%s", usage);
851 i = 2;
852 if (argc == 4) {
853 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
854 i++;
855 }
857 string_ncopy(opt_file, argv[i], strlen(argv[i]));
858 return REQ_VIEW_BLAME;
860 } else if (!strcmp(subcommand, "show")) {
861 request = REQ_VIEW_DIFF;
863 } else if (!strcmp(subcommand, "log") || !strcmp(subcommand, "diff")) {
864 request = subcommand[0] == 'l' ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
865 warn("`tig %s' has been deprecated", subcommand);
867 } else {
868 subcommand = NULL;
869 }
871 if (subcommand) {
872 custom_argv[1] = subcommand;
873 j = 2;
874 }
876 for (i = 1 + !!subcommand; i < argc; i++) {
877 const char *opt = argv[i];
879 if (seen_dashdash || !strcmp(opt, "--")) {
880 seen_dashdash = TRUE;
882 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
883 printf("tig version %s\n", TIG_VERSION);
884 return REQ_NONE;
886 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
887 printf("%s\n", usage);
888 return REQ_NONE;
889 }
891 custom_argv[j++] = opt;
892 if (j >= ARRAY_SIZE(custom_argv))
893 die("command too long");
894 }
896 custom_argv[j] = NULL;
897 *run_argv = custom_argv;
899 return request;
900 }
903 /*
904 * Line-oriented content detection.
905 */
907 #define LINE_INFO \
908 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
909 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
910 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
911 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
912 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
913 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
914 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
915 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
916 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
917 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
918 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
919 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
920 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
921 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
922 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
923 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
924 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
925 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
926 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
927 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
928 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
929 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
930 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
931 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
932 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
933 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
934 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
935 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
936 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
937 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
938 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
939 LINE(DELIMITER, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
940 LINE(DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
941 LINE(LINE_NUMBER, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
942 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
943 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
944 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
945 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
946 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
947 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
948 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
949 LINE(MAIN_TRACKED, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
950 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
951 LINE(MAIN_HEAD, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
952 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
953 LINE(TREE_PARENT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD), \
954 LINE(TREE_MODE, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
955 LINE(TREE_DIR, "", COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL), \
956 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
957 LINE(STAT_HEAD, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
958 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
959 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
960 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
961 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
962 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
963 LINE(BLAME_ID, "", COLOR_MAGENTA, COLOR_DEFAULT, 0)
965 enum line_type {
966 #define LINE(type, line, fg, bg, attr) \
967 LINE_##type
968 LINE_INFO,
969 LINE_NONE
970 #undef LINE
971 };
973 struct line_info {
974 const char *name; /* Option name. */
975 int namelen; /* Size of option name. */
976 const char *line; /* The start of line to match. */
977 int linelen; /* Size of string to match. */
978 int fg, bg, attr; /* Color and text attributes for the lines. */
979 };
981 static struct line_info line_info[] = {
982 #define LINE(type, line, fg, bg, attr) \
983 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
984 LINE_INFO
985 #undef LINE
986 };
988 static enum line_type
989 get_line_type(const char *line)
990 {
991 int linelen = strlen(line);
992 enum line_type type;
994 for (type = 0; type < ARRAY_SIZE(line_info); type++)
995 /* Case insensitive search matches Signed-off-by lines better. */
996 if (linelen >= line_info[type].linelen &&
997 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
998 return type;
1000 return LINE_DEFAULT;
1001 }
1003 static inline int
1004 get_line_attr(enum line_type type)
1005 {
1006 assert(type < ARRAY_SIZE(line_info));
1007 return COLOR_PAIR(type) | line_info[type].attr;
1008 }
1010 static struct line_info *
1011 get_line_info(const char *name)
1012 {
1013 size_t namelen = strlen(name);
1014 enum line_type type;
1016 for (type = 0; type < ARRAY_SIZE(line_info); type++)
1017 if (namelen == line_info[type].namelen &&
1018 !string_enum_compare(line_info[type].name, name, namelen))
1019 return &line_info[type];
1021 return NULL;
1022 }
1024 static void
1025 init_colors(void)
1026 {
1027 int default_bg = line_info[LINE_DEFAULT].bg;
1028 int default_fg = line_info[LINE_DEFAULT].fg;
1029 enum line_type type;
1031 start_color();
1033 if (assume_default_colors(default_fg, default_bg) == ERR) {
1034 default_bg = COLOR_BLACK;
1035 default_fg = COLOR_WHITE;
1036 }
1038 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
1039 struct line_info *info = &line_info[type];
1040 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
1041 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
1043 init_pair(type, fg, bg);
1044 }
1045 }
1047 struct line {
1048 enum line_type type;
1050 /* State flags */
1051 unsigned int selected:1;
1052 unsigned int dirty:1;
1053 unsigned int cleareol:1;
1055 void *data; /* User data */
1056 };
1059 /*
1060 * Keys
1061 */
1063 struct keybinding {
1064 int alias;
1065 enum request request;
1066 };
1068 static struct keybinding default_keybindings[] = {
1069 /* View switching */
1070 { 'm', REQ_VIEW_MAIN },
1071 { 'd', REQ_VIEW_DIFF },
1072 { 'l', REQ_VIEW_LOG },
1073 { 't', REQ_VIEW_TREE },
1074 { 'f', REQ_VIEW_BLOB },
1075 { 'B', REQ_VIEW_BLAME },
1076 { 'p', REQ_VIEW_PAGER },
1077 { 'h', REQ_VIEW_HELP },
1078 { 'S', REQ_VIEW_STATUS },
1079 { 'c', REQ_VIEW_STAGE },
1081 /* View manipulation */
1082 { 'q', REQ_VIEW_CLOSE },
1083 { KEY_TAB, REQ_VIEW_NEXT },
1084 { KEY_RETURN, REQ_ENTER },
1085 { KEY_UP, REQ_PREVIOUS },
1086 { KEY_DOWN, REQ_NEXT },
1087 { 'R', REQ_REFRESH },
1088 { KEY_F(5), REQ_REFRESH },
1089 { 'O', REQ_MAXIMIZE },
1091 /* Cursor navigation */
1092 { 'k', REQ_MOVE_UP },
1093 { 'j', REQ_MOVE_DOWN },
1094 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1095 { KEY_END, REQ_MOVE_LAST_LINE },
1096 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1097 { ' ', REQ_MOVE_PAGE_DOWN },
1098 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1099 { 'b', REQ_MOVE_PAGE_UP },
1100 { '-', REQ_MOVE_PAGE_UP },
1102 /* Scrolling */
1103 { KEY_IC, REQ_SCROLL_LINE_UP },
1104 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1105 { 'w', REQ_SCROLL_PAGE_UP },
1106 { 's', REQ_SCROLL_PAGE_DOWN },
1108 /* Searching */
1109 { '/', REQ_SEARCH },
1110 { '?', REQ_SEARCH_BACK },
1111 { 'n', REQ_FIND_NEXT },
1112 { 'N', REQ_FIND_PREV },
1114 /* Misc */
1115 { 'Q', REQ_QUIT },
1116 { 'z', REQ_STOP_LOADING },
1117 { 'v', REQ_SHOW_VERSION },
1118 { 'r', REQ_SCREEN_REDRAW },
1119 { '.', REQ_TOGGLE_LINENO },
1120 { 'D', REQ_TOGGLE_DATE },
1121 { 'A', REQ_TOGGLE_AUTHOR },
1122 { 'g', REQ_TOGGLE_REV_GRAPH },
1123 { 'F', REQ_TOGGLE_REFS },
1124 { ':', REQ_PROMPT },
1125 { 'u', REQ_STATUS_UPDATE },
1126 { '!', REQ_STATUS_REVERT },
1127 { 'M', REQ_STATUS_MERGE },
1128 { '@', REQ_STAGE_NEXT },
1129 { ',', REQ_PARENT },
1130 { 'e', REQ_EDIT },
1131 };
1133 #define KEYMAP_INFO \
1134 KEYMAP_(GENERIC), \
1135 KEYMAP_(MAIN), \
1136 KEYMAP_(DIFF), \
1137 KEYMAP_(LOG), \
1138 KEYMAP_(TREE), \
1139 KEYMAP_(BLOB), \
1140 KEYMAP_(BLAME), \
1141 KEYMAP_(PAGER), \
1142 KEYMAP_(HELP), \
1143 KEYMAP_(STATUS), \
1144 KEYMAP_(STAGE)
1146 enum keymap {
1147 #define KEYMAP_(name) KEYMAP_##name
1148 KEYMAP_INFO
1149 #undef KEYMAP_
1150 };
1152 static struct int_map keymap_table[] = {
1153 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
1154 KEYMAP_INFO
1155 #undef KEYMAP_
1156 };
1158 #define set_keymap(map, name) \
1159 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
1161 struct keybinding_table {
1162 struct keybinding *data;
1163 size_t size;
1164 };
1166 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
1168 static void
1169 add_keybinding(enum keymap keymap, enum request request, int key)
1170 {
1171 struct keybinding_table *table = &keybindings[keymap];
1173 table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
1174 if (!table->data)
1175 die("Failed to allocate keybinding");
1176 table->data[table->size].alias = key;
1177 table->data[table->size++].request = request;
1178 }
1180 /* Looks for a key binding first in the given map, then in the generic map, and
1181 * lastly in the default keybindings. */
1182 static enum request
1183 get_keybinding(enum keymap keymap, int key)
1184 {
1185 size_t i;
1187 for (i = 0; i < keybindings[keymap].size; i++)
1188 if (keybindings[keymap].data[i].alias == key)
1189 return keybindings[keymap].data[i].request;
1191 for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
1192 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
1193 return keybindings[KEYMAP_GENERIC].data[i].request;
1195 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
1196 if (default_keybindings[i].alias == key)
1197 return default_keybindings[i].request;
1199 return (enum request) key;
1200 }
1203 struct key {
1204 const char *name;
1205 int value;
1206 };
1208 static struct key key_table[] = {
1209 { "Enter", KEY_RETURN },
1210 { "Space", ' ' },
1211 { "Backspace", KEY_BACKSPACE },
1212 { "Tab", KEY_TAB },
1213 { "Escape", KEY_ESC },
1214 { "Left", KEY_LEFT },
1215 { "Right", KEY_RIGHT },
1216 { "Up", KEY_UP },
1217 { "Down", KEY_DOWN },
1218 { "Insert", KEY_IC },
1219 { "Delete", KEY_DC },
1220 { "Hash", '#' },
1221 { "Home", KEY_HOME },
1222 { "End", KEY_END },
1223 { "PageUp", KEY_PPAGE },
1224 { "PageDown", KEY_NPAGE },
1225 { "F1", KEY_F(1) },
1226 { "F2", KEY_F(2) },
1227 { "F3", KEY_F(3) },
1228 { "F4", KEY_F(4) },
1229 { "F5", KEY_F(5) },
1230 { "F6", KEY_F(6) },
1231 { "F7", KEY_F(7) },
1232 { "F8", KEY_F(8) },
1233 { "F9", KEY_F(9) },
1234 { "F10", KEY_F(10) },
1235 { "F11", KEY_F(11) },
1236 { "F12", KEY_F(12) },
1237 };
1239 static int
1240 get_key_value(const char *name)
1241 {
1242 int i;
1244 for (i = 0; i < ARRAY_SIZE(key_table); i++)
1245 if (!strcasecmp(key_table[i].name, name))
1246 return key_table[i].value;
1248 if (strlen(name) == 1 && isprint(*name))
1249 return (int) *name;
1251 return ERR;
1252 }
1254 static const char *
1255 get_key_name(int key_value)
1256 {
1257 static char key_char[] = "'X'";
1258 const char *seq = NULL;
1259 int key;
1261 for (key = 0; key < ARRAY_SIZE(key_table); key++)
1262 if (key_table[key].value == key_value)
1263 seq = key_table[key].name;
1265 if (seq == NULL &&
1266 key_value < 127 &&
1267 isprint(key_value)) {
1268 key_char[1] = (char) key_value;
1269 seq = key_char;
1270 }
1272 return seq ? seq : "(no key)";
1273 }
1275 static const char *
1276 get_key(enum request request)
1277 {
1278 static char buf[BUFSIZ];
1279 size_t pos = 0;
1280 char *sep = "";
1281 int i;
1283 buf[pos] = 0;
1285 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
1286 struct keybinding *keybinding = &default_keybindings[i];
1288 if (keybinding->request != request)
1289 continue;
1291 if (!string_format_from(buf, &pos, "%s%s", sep,
1292 get_key_name(keybinding->alias)))
1293 return "Too many keybindings!";
1294 sep = ", ";
1295 }
1297 return buf;
1298 }
1300 struct run_request {
1301 enum keymap keymap;
1302 int key;
1303 const char *argv[SIZEOF_ARG];
1304 };
1306 static struct run_request *run_request;
1307 static size_t run_requests;
1309 static enum request
1310 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
1311 {
1312 struct run_request *req;
1314 if (argc >= ARRAY_SIZE(req->argv) - 1)
1315 return REQ_NONE;
1317 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1318 if (!req)
1319 return REQ_NONE;
1321 run_request = req;
1322 req = &run_request[run_requests];
1323 req->keymap = keymap;
1324 req->key = key;
1325 req->argv[0] = NULL;
1327 if (!format_argv(req->argv, argv, FORMAT_NONE))
1328 return REQ_NONE;
1330 return REQ_NONE + ++run_requests;
1331 }
1333 static struct run_request *
1334 get_run_request(enum request request)
1335 {
1336 if (request <= REQ_NONE)
1337 return NULL;
1338 return &run_request[request - REQ_NONE - 1];
1339 }
1341 static void
1342 add_builtin_run_requests(void)
1343 {
1344 const char *cherry_pick[] = { "git", "cherry-pick", "%(commit)", NULL };
1345 const char *gc[] = { "git", "gc", NULL };
1346 struct {
1347 enum keymap keymap;
1348 int key;
1349 int argc;
1350 const char **argv;
1351 } reqs[] = {
1352 { KEYMAP_MAIN, 'C', ARRAY_SIZE(cherry_pick) - 1, cherry_pick },
1353 { KEYMAP_GENERIC, 'G', ARRAY_SIZE(gc) - 1, gc },
1354 };
1355 int i;
1357 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1358 enum request req;
1360 req = add_run_request(reqs[i].keymap, reqs[i].key, reqs[i].argc, reqs[i].argv);
1361 if (req != REQ_NONE)
1362 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1363 }
1364 }
1366 /*
1367 * User config file handling.
1368 */
1370 static struct int_map color_map[] = {
1371 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
1372 COLOR_MAP(DEFAULT),
1373 COLOR_MAP(BLACK),
1374 COLOR_MAP(BLUE),
1375 COLOR_MAP(CYAN),
1376 COLOR_MAP(GREEN),
1377 COLOR_MAP(MAGENTA),
1378 COLOR_MAP(RED),
1379 COLOR_MAP(WHITE),
1380 COLOR_MAP(YELLOW),
1381 };
1383 #define set_color(color, name) \
1384 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
1386 static struct int_map attr_map[] = {
1387 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
1388 ATTR_MAP(NORMAL),
1389 ATTR_MAP(BLINK),
1390 ATTR_MAP(BOLD),
1391 ATTR_MAP(DIM),
1392 ATTR_MAP(REVERSE),
1393 ATTR_MAP(STANDOUT),
1394 ATTR_MAP(UNDERLINE),
1395 };
1397 #define set_attribute(attr, name) \
1398 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
1400 static int config_lineno;
1401 static bool config_errors;
1402 static const char *config_msg;
1404 /* Wants: object fgcolor bgcolor [attr] */
1405 static int
1406 option_color_command(int argc, const char *argv[])
1407 {
1408 struct line_info *info;
1410 if (argc != 3 && argc != 4) {
1411 config_msg = "Wrong number of arguments given to color command";
1412 return ERR;
1413 }
1415 info = get_line_info(argv[0]);
1416 if (!info) {
1417 if (!string_enum_compare(argv[0], "main-delim", strlen("main-delim"))) {
1418 info = get_line_info("delimiter");
1420 } else if (!string_enum_compare(argv[0], "main-date", strlen("main-date"))) {
1421 info = get_line_info("date");
1423 } else {
1424 config_msg = "Unknown color name";
1425 return ERR;
1426 }
1427 }
1429 if (set_color(&info->fg, argv[1]) == ERR ||
1430 set_color(&info->bg, argv[2]) == ERR) {
1431 config_msg = "Unknown color";
1432 return ERR;
1433 }
1435 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1436 config_msg = "Unknown attribute";
1437 return ERR;
1438 }
1440 return OK;
1441 }
1443 static bool parse_bool(const char *s)
1444 {
1445 return (!strcmp(s, "1") || !strcmp(s, "true") ||
1446 !strcmp(s, "yes")) ? TRUE : FALSE;
1447 }
1449 static int
1450 parse_int(const char *s, int default_value, int min, int max)
1451 {
1452 int value = atoi(s);
1454 return (value < min || value > max) ? default_value : value;
1455 }
1457 /* Wants: name = value */
1458 static int
1459 option_set_command(int argc, const char *argv[])
1460 {
1461 if (argc != 3) {
1462 config_msg = "Wrong number of arguments given to set command";
1463 return ERR;
1464 }
1466 if (strcmp(argv[1], "=")) {
1467 config_msg = "No value assigned";
1468 return ERR;
1469 }
1471 if (!strcmp(argv[0], "show-author")) {
1472 opt_author = parse_bool(argv[2]);
1473 return OK;
1474 }
1476 if (!strcmp(argv[0], "show-date")) {
1477 opt_date = parse_bool(argv[2]);
1478 return OK;
1479 }
1481 if (!strcmp(argv[0], "show-rev-graph")) {
1482 opt_rev_graph = parse_bool(argv[2]);
1483 return OK;
1484 }
1486 if (!strcmp(argv[0], "show-refs")) {
1487 opt_show_refs = parse_bool(argv[2]);
1488 return OK;
1489 }
1491 if (!strcmp(argv[0], "show-line-numbers")) {
1492 opt_line_number = parse_bool(argv[2]);
1493 return OK;
1494 }
1496 if (!strcmp(argv[0], "line-graphics")) {
1497 opt_line_graphics = parse_bool(argv[2]);
1498 return OK;
1499 }
1501 if (!strcmp(argv[0], "line-number-interval")) {
1502 opt_num_interval = parse_int(argv[2], opt_num_interval, 1, 1024);
1503 return OK;
1504 }
1506 if (!strcmp(argv[0], "author-width")) {
1507 opt_author_cols = parse_int(argv[2], opt_author_cols, 0, 1024);
1508 return OK;
1509 }
1511 if (!strcmp(argv[0], "tab-size")) {
1512 opt_tab_size = parse_int(argv[2], opt_tab_size, 1, 1024);
1513 return OK;
1514 }
1516 if (!strcmp(argv[0], "commit-encoding")) {
1517 const char *arg = argv[2];
1518 int arglen = strlen(arg);
1520 switch (arg[0]) {
1521 case '"':
1522 case '\'':
1523 if (arglen == 1 || arg[arglen - 1] != arg[0]) {
1524 config_msg = "Unmatched quotation";
1525 return ERR;
1526 }
1527 arg += 1; arglen -= 2;
1528 default:
1529 string_ncopy(opt_encoding, arg, strlen(arg));
1530 return OK;
1531 }
1532 }
1534 config_msg = "Unknown variable name";
1535 return ERR;
1536 }
1538 /* Wants: mode request key */
1539 static int
1540 option_bind_command(int argc, const char *argv[])
1541 {
1542 enum request request;
1543 int keymap;
1544 int key;
1546 if (argc < 3) {
1547 config_msg = "Wrong number of arguments given to bind command";
1548 return ERR;
1549 }
1551 if (set_keymap(&keymap, argv[0]) == ERR) {
1552 config_msg = "Unknown key map";
1553 return ERR;
1554 }
1556 key = get_key_value(argv[1]);
1557 if (key == ERR) {
1558 config_msg = "Unknown key";
1559 return ERR;
1560 }
1562 request = get_request(argv[2]);
1563 if (request == REQ_NONE) {
1564 struct {
1565 const char *name;
1566 enum request request;
1567 } obsolete[] = {
1568 { "cherry-pick", REQ_NONE },
1569 { "screen-resize", REQ_NONE },
1570 { "tree-parent", REQ_PARENT },
1571 };
1572 size_t namelen = strlen(argv[2]);
1573 int i;
1575 for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
1576 if (namelen != strlen(obsolete[i].name) ||
1577 string_enum_compare(obsolete[i].name, argv[2], namelen))
1578 continue;
1579 if (obsolete[i].request != REQ_NONE)
1580 add_keybinding(keymap, obsolete[i].request, key);
1581 config_msg = "Obsolete request name";
1582 return ERR;
1583 }
1584 }
1585 if (request == REQ_NONE && *argv[2]++ == '!')
1586 request = add_run_request(keymap, key, argc - 2, argv + 2);
1587 if (request == REQ_NONE) {
1588 config_msg = "Unknown request name";
1589 return ERR;
1590 }
1592 add_keybinding(keymap, request, key);
1594 return OK;
1595 }
1597 static int
1598 set_option(const char *opt, char *value)
1599 {
1600 const char *argv[SIZEOF_ARG];
1601 int argc = 0;
1603 if (!argv_from_string(argv, &argc, value)) {
1604 config_msg = "Too many option arguments";
1605 return ERR;
1606 }
1608 if (!strcmp(opt, "color"))
1609 return option_color_command(argc, argv);
1611 if (!strcmp(opt, "set"))
1612 return option_set_command(argc, argv);
1614 if (!strcmp(opt, "bind"))
1615 return option_bind_command(argc, argv);
1617 config_msg = "Unknown option command";
1618 return ERR;
1619 }
1621 static int
1622 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1623 {
1624 int status = OK;
1626 config_lineno++;
1627 config_msg = "Internal error";
1629 /* Check for comment markers, since read_properties() will
1630 * only ensure opt and value are split at first " \t". */
1631 optlen = strcspn(opt, "#");
1632 if (optlen == 0)
1633 return OK;
1635 if (opt[optlen] != 0) {
1636 config_msg = "No option value";
1637 status = ERR;
1639 } else {
1640 /* Look for comment endings in the value. */
1641 size_t len = strcspn(value, "#");
1643 if (len < valuelen) {
1644 valuelen = len;
1645 value[valuelen] = 0;
1646 }
1648 status = set_option(opt, value);
1649 }
1651 if (status == ERR) {
1652 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1653 config_lineno, (int) optlen, opt, config_msg);
1654 config_errors = TRUE;
1655 }
1657 /* Always keep going if errors are encountered. */
1658 return OK;
1659 }
1661 static void
1662 load_option_file(const char *path)
1663 {
1664 struct io io = {};
1666 /* It's ok that the file doesn't exist. */
1667 if (!io_open(&io, path))
1668 return;
1670 config_lineno = 0;
1671 config_errors = FALSE;
1673 if (read_properties(&io, " \t", read_option) == ERR ||
1674 config_errors == TRUE)
1675 fprintf(stderr, "Errors while loading %s.\n", path);
1676 }
1678 static int
1679 load_options(void)
1680 {
1681 const char *home = getenv("HOME");
1682 const char *tigrc_user = getenv("TIGRC_USER");
1683 const char *tigrc_system = getenv("TIGRC_SYSTEM");
1684 char buf[SIZEOF_STR];
1686 add_builtin_run_requests();
1688 if (!tigrc_system) {
1689 if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
1690 return ERR;
1691 tigrc_system = buf;
1692 }
1693 load_option_file(tigrc_system);
1695 if (!tigrc_user) {
1696 if (!home || !string_format(buf, "%s/.tigrc", home))
1697 return ERR;
1698 tigrc_user = buf;
1699 }
1700 load_option_file(tigrc_user);
1702 return OK;
1703 }
1706 /*
1707 * The viewer
1708 */
1710 struct view;
1711 struct view_ops;
1713 /* The display array of active views and the index of the current view. */
1714 static struct view *display[2];
1715 static unsigned int current_view;
1717 /* Reading from the prompt? */
1718 static bool input_mode = FALSE;
1720 #define foreach_displayed_view(view, i) \
1721 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1723 #define displayed_views() (display[1] != NULL ? 2 : 1)
1725 /* Current head and commit ID */
1726 static char ref_blob[SIZEOF_REF] = "";
1727 static char ref_commit[SIZEOF_REF] = "HEAD";
1728 static char ref_head[SIZEOF_REF] = "HEAD";
1730 struct view {
1731 const char *name; /* View name */
1732 const char *cmd_env; /* Command line set via environment */
1733 const char *id; /* Points to either of ref_{head,commit,blob} */
1735 struct view_ops *ops; /* View operations */
1737 enum keymap keymap; /* What keymap does this view have */
1738 bool git_dir; /* Whether the view requires a git directory. */
1740 char ref[SIZEOF_REF]; /* Hovered commit reference */
1741 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1743 int height, width; /* The width and height of the main window */
1744 WINDOW *win; /* The main window */
1745 WINDOW *title; /* The title window living below the main window */
1747 /* Navigation */
1748 unsigned long offset; /* Offset of the window top */
1749 unsigned long lineno; /* Current line number */
1750 unsigned long p_offset; /* Previous offset of the window top */
1751 unsigned long p_lineno; /* Previous current line number */
1752 bool p_restore; /* Should the previous position be restored. */
1754 /* Searching */
1755 char grep[SIZEOF_STR]; /* Search string */
1756 regex_t *regex; /* Pre-compiled regex */
1758 /* If non-NULL, points to the view that opened this view. If this view
1759 * is closed tig will switch back to the parent view. */
1760 struct view *parent;
1762 /* Buffering */
1763 size_t lines; /* Total number of lines */
1764 struct line *line; /* Line index */
1765 size_t line_alloc; /* Total number of allocated lines */
1766 unsigned int digits; /* Number of digits in the lines member. */
1768 /* Drawing */
1769 struct line *curline; /* Line currently being drawn. */
1770 enum line_type curtype; /* Attribute currently used for drawing. */
1771 unsigned long col; /* Column when drawing. */
1773 /* Loading */
1774 struct io io;
1775 struct io *pipe;
1776 time_t start_time;
1777 time_t update_secs;
1778 };
1780 struct view_ops {
1781 /* What type of content being displayed. Used in the title bar. */
1782 const char *type;
1783 /* Default command arguments. */
1784 const char **argv;
1785 /* Open and reads in all view content. */
1786 bool (*open)(struct view *view);
1787 /* Read one line; updates view->line. */
1788 bool (*read)(struct view *view, char *data);
1789 /* Draw one line; @lineno must be < view->height. */
1790 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1791 /* Depending on view handle a special requests. */
1792 enum request (*request)(struct view *view, enum request request, struct line *line);
1793 /* Search for regex in a line. */
1794 bool (*grep)(struct view *view, struct line *line);
1795 /* Select line */
1796 void (*select)(struct view *view, struct line *line);
1797 };
1799 static struct view_ops blame_ops;
1800 static struct view_ops blob_ops;
1801 static struct view_ops diff_ops;
1802 static struct view_ops help_ops;
1803 static struct view_ops log_ops;
1804 static struct view_ops main_ops;
1805 static struct view_ops pager_ops;
1806 static struct view_ops stage_ops;
1807 static struct view_ops status_ops;
1808 static struct view_ops tree_ops;
1810 #define VIEW_STR(name, env, ref, ops, map, git) \
1811 { name, #env, ref, ops, map, git }
1813 #define VIEW_(id, name, ops, git, ref) \
1814 VIEW_STR(name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1817 static struct view views[] = {
1818 VIEW_(MAIN, "main", &main_ops, TRUE, ref_head),
1819 VIEW_(DIFF, "diff", &diff_ops, TRUE, ref_commit),
1820 VIEW_(LOG, "log", &log_ops, TRUE, ref_head),
1821 VIEW_(TREE, "tree", &tree_ops, TRUE, ref_commit),
1822 VIEW_(BLOB, "blob", &blob_ops, TRUE, ref_blob),
1823 VIEW_(BLAME, "blame", &blame_ops, TRUE, ref_commit),
1824 VIEW_(HELP, "help", &help_ops, FALSE, ""),
1825 VIEW_(PAGER, "pager", &pager_ops, FALSE, "stdin"),
1826 VIEW_(STATUS, "status", &status_ops, TRUE, ""),
1827 VIEW_(STAGE, "stage", &stage_ops, TRUE, ""),
1828 };
1830 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1831 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1833 #define foreach_view(view, i) \
1834 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1836 #define view_is_displayed(view) \
1837 (view == display[0] || view == display[1])
1840 enum line_graphic {
1841 LINE_GRAPHIC_VLINE
1842 };
1844 static int line_graphics[] = {
1845 /* LINE_GRAPHIC_VLINE: */ '|'
1846 };
1848 static inline void
1849 set_view_attr(struct view *view, enum line_type type)
1850 {
1851 if (!view->curline->selected && view->curtype != type) {
1852 wattrset(view->win, get_line_attr(type));
1853 wchgat(view->win, -1, 0, type, NULL);
1854 view->curtype = type;
1855 }
1856 }
1858 static int
1859 draw_chars(struct view *view, enum line_type type, const char *string,
1860 int max_len, bool use_tilde)
1861 {
1862 int len = 0;
1863 int col = 0;
1864 int trimmed = FALSE;
1866 if (max_len <= 0)
1867 return 0;
1869 if (opt_utf8) {
1870 len = utf8_length(string, &col, max_len, &trimmed, use_tilde);
1871 } else {
1872 col = len = strlen(string);
1873 if (len > max_len) {
1874 if (use_tilde) {
1875 max_len -= 1;
1876 }
1877 col = len = max_len;
1878 trimmed = TRUE;
1879 }
1880 }
1882 set_view_attr(view, type);
1883 waddnstr(view->win, string, len);
1884 if (trimmed && use_tilde) {
1885 set_view_attr(view, LINE_DELIMITER);
1886 waddch(view->win, '~');
1887 col++;
1888 }
1890 return col;
1891 }
1893 static int
1894 draw_space(struct view *view, enum line_type type, int max, int spaces)
1895 {
1896 static char space[] = " ";
1897 int col = 0;
1899 spaces = MIN(max, spaces);
1901 while (spaces > 0) {
1902 int len = MIN(spaces, sizeof(space) - 1);
1904 col += draw_chars(view, type, space, spaces, FALSE);
1905 spaces -= len;
1906 }
1908 return col;
1909 }
1911 static bool
1912 draw_lineno(struct view *view, unsigned int lineno)
1913 {
1914 char number[10];
1915 int digits3 = view->digits < 3 ? 3 : view->digits;
1916 int max_number = MIN(digits3, STRING_SIZE(number));
1917 int max = view->width - view->col;
1918 int col;
1920 if (max < max_number)
1921 max_number = max;
1923 lineno += view->offset + 1;
1924 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1925 static char fmt[] = "%1ld";
1927 if (view->digits <= 9)
1928 fmt[1] = '0' + digits3;
1930 if (!string_format(number, fmt, lineno))
1931 number[0] = 0;
1932 col = draw_chars(view, LINE_LINE_NUMBER, number, max_number, TRUE);
1933 } else {
1934 col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
1935 }
1937 if (col < max) {
1938 set_view_attr(view, LINE_DEFAULT);
1939 waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
1940 col++;
1941 }
1943 if (col < max)
1944 col += draw_space(view, LINE_DEFAULT, max - col, 1);
1945 view->col += col;
1947 return view->width - view->col <= 0;
1948 }
1950 static bool
1951 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1952 {
1953 view->col += draw_chars(view, type, string, view->width - view->col, trim);
1954 return view->width - view->col <= 0;
1955 }
1957 static bool
1958 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1959 {
1960 int max = view->width - view->col;
1961 int i;
1963 if (max < size)
1964 size = max;
1966 set_view_attr(view, type);
1967 /* Using waddch() instead of waddnstr() ensures that
1968 * they'll be rendered correctly for the cursor line. */
1969 for (i = 0; i < size; i++)
1970 waddch(view->win, graphic[i]);
1972 view->col += size;
1973 if (size < max) {
1974 waddch(view->win, ' ');
1975 view->col++;
1976 }
1978 return view->width - view->col <= 0;
1979 }
1981 static bool
1982 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1983 {
1984 int max = MIN(view->width - view->col, len);
1985 int col;
1987 if (text)
1988 col = draw_chars(view, type, text, max - 1, trim);
1989 else
1990 col = draw_space(view, type, max - 1, max - 1);
1992 view->col += col + draw_space(view, LINE_DEFAULT, max - col, max - col);
1993 return view->width - view->col <= 0;
1994 }
1996 static bool
1997 draw_date(struct view *view, struct tm *time)
1998 {
1999 char buf[DATE_COLS];
2000 char *date;
2001 int timelen = 0;
2003 if (time)
2004 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
2005 date = timelen ? buf : NULL;
2007 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
2008 }
2010 static bool
2011 draw_author(struct view *view, const char *author)
2012 {
2013 return draw_field(view, LINE_MAIN_AUTHOR, author, opt_author_cols, TRUE);
2014 }
2016 static bool
2017 draw_view_line(struct view *view, unsigned int lineno)
2018 {
2019 struct line *line;
2020 bool selected = (view->offset + lineno == view->lineno);
2022 assert(view_is_displayed(view));
2024 if (view->offset + lineno >= view->lines)
2025 return FALSE;
2027 line = &view->line[view->offset + lineno];
2029 wmove(view->win, lineno, 0);
2030 if (line->cleareol)
2031 wclrtoeol(view->win);
2032 view->col = 0;
2033 view->curline = line;
2034 view->curtype = LINE_NONE;
2035 line->selected = FALSE;
2036 line->dirty = line->cleareol = 0;
2038 if (selected) {
2039 set_view_attr(view, LINE_CURSOR);
2040 line->selected = TRUE;
2041 view->ops->select(view, line);
2042 }
2044 return view->ops->draw(view, line, lineno);
2045 }
2047 static void
2048 redraw_view_dirty(struct view *view)
2049 {
2050 bool dirty = FALSE;
2051 int lineno;
2053 for (lineno = 0; lineno < view->height; lineno++) {
2054 if (view->offset + lineno >= view->lines)
2055 break;
2056 if (!view->line[view->offset + lineno].dirty)
2057 continue;
2058 dirty = TRUE;
2059 if (!draw_view_line(view, lineno))
2060 break;
2061 }
2063 if (!dirty)
2064 return;
2065 if (input_mode)
2066 wnoutrefresh(view->win);
2067 else
2068 wrefresh(view->win);
2069 }
2071 static void
2072 redraw_view_from(struct view *view, int lineno)
2073 {
2074 assert(0 <= lineno && lineno < view->height);
2076 for (; lineno < view->height; lineno++) {
2077 if (!draw_view_line(view, lineno))
2078 break;
2079 }
2081 if (input_mode)
2082 wnoutrefresh(view->win);
2083 else
2084 wrefresh(view->win);
2085 }
2087 static void
2088 redraw_view(struct view *view)
2089 {
2090 werase(view->win);
2091 redraw_view_from(view, 0);
2092 }
2095 static void
2096 update_display_cursor(struct view *view)
2097 {
2098 /* Move the cursor to the right-most column of the cursor line.
2099 *
2100 * XXX: This could turn out to be a bit expensive, but it ensures that
2101 * the cursor does not jump around. */
2102 if (view->lines) {
2103 wmove(view->win, view->lineno - view->offset, view->width - 1);
2104 wrefresh(view->win);
2105 }
2106 }
2108 static void
2109 update_view_title(struct view *view)
2110 {
2111 char buf[SIZEOF_STR];
2112 char state[SIZEOF_STR];
2113 size_t bufpos = 0, statelen = 0;
2115 assert(view_is_displayed(view));
2117 if (view != VIEW(REQ_VIEW_STATUS) && view->lines) {
2118 unsigned int view_lines = view->offset + view->height;
2119 unsigned int lines = view->lines
2120 ? MIN(view_lines, view->lines) * 100 / view->lines
2121 : 0;
2123 string_format_from(state, &statelen, " - %s %d of %d (%d%%)",
2124 view->ops->type,
2125 view->lineno + 1,
2126 view->lines,
2127 lines);
2129 }
2131 if (view->pipe) {
2132 time_t secs = time(NULL) - view->start_time;
2134 /* Three git seconds are a long time ... */
2135 if (secs > 2)
2136 string_format_from(state, &statelen, " loading %lds", secs);
2137 }
2139 string_format_from(buf, &bufpos, "[%s]", view->name);
2140 if (*view->ref && bufpos < view->width) {
2141 size_t refsize = strlen(view->ref);
2142 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
2144 if (minsize < view->width)
2145 refsize = view->width - minsize + 7;
2146 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
2147 }
2149 if (statelen && bufpos < view->width) {
2150 string_format_from(buf, &bufpos, "%s", state);
2151 }
2153 if (view == display[current_view])
2154 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
2155 else
2156 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
2158 mvwaddnstr(view->title, 0, 0, buf, bufpos);
2159 wclrtoeol(view->title);
2160 wmove(view->title, 0, view->width - 1);
2162 if (input_mode)
2163 wnoutrefresh(view->title);
2164 else
2165 wrefresh(view->title);
2166 }
2168 static void
2169 resize_display(void)
2170 {
2171 int offset, i;
2172 struct view *base = display[0];
2173 struct view *view = display[1] ? display[1] : display[0];
2175 /* Setup window dimensions */
2177 getmaxyx(stdscr, base->height, base->width);
2179 /* Make room for the status window. */
2180 base->height -= 1;
2182 if (view != base) {
2183 /* Horizontal split. */
2184 view->width = base->width;
2185 view->height = SCALE_SPLIT_VIEW(base->height);
2186 base->height -= view->height;
2188 /* Make room for the title bar. */
2189 view->height -= 1;
2190 }
2192 /* Make room for the title bar. */
2193 base->height -= 1;
2195 offset = 0;
2197 foreach_displayed_view (view, i) {
2198 if (!view->win) {
2199 view->win = newwin(view->height, 0, offset, 0);
2200 if (!view->win)
2201 die("Failed to create %s view", view->name);
2203 scrollok(view->win, FALSE);
2205 view->title = newwin(1, 0, offset + view->height, 0);
2206 if (!view->title)
2207 die("Failed to create title window");
2209 } else {
2210 wresize(view->win, view->height, view->width);
2211 mvwin(view->win, offset, 0);
2212 mvwin(view->title, offset + view->height, 0);
2213 }
2215 offset += view->height + 1;
2216 }
2217 }
2219 static void
2220 redraw_display(bool clear)
2221 {
2222 struct view *view;
2223 int i;
2225 foreach_displayed_view (view, i) {
2226 if (clear)
2227 wclear(view->win);
2228 redraw_view(view);
2229 update_view_title(view);
2230 }
2232 if (display[current_view])
2233 update_display_cursor(display[current_view]);
2234 }
2236 static void
2237 toggle_view_option(bool *option, const char *help)
2238 {
2239 *option = !*option;
2240 redraw_display(FALSE);
2241 report("%sabling %s", *option ? "En" : "Dis", help);
2242 }
2244 /*
2245 * Navigation
2246 */
2248 /* Scrolling backend */
2249 static void
2250 do_scroll_view(struct view *view, int lines)
2251 {
2252 bool redraw_current_line = FALSE;
2254 /* The rendering expects the new offset. */
2255 view->offset += lines;
2257 assert(0 <= view->offset && view->offset < view->lines);
2258 assert(lines);
2260 /* Move current line into the view. */
2261 if (view->lineno < view->offset) {
2262 view->lineno = view->offset;
2263 redraw_current_line = TRUE;
2264 } else if (view->lineno >= view->offset + view->height) {
2265 view->lineno = view->offset + view->height - 1;
2266 redraw_current_line = TRUE;
2267 }
2269 assert(view->offset <= view->lineno && view->lineno < view->lines);
2271 /* Redraw the whole screen if scrolling is pointless. */
2272 if (view->height < ABS(lines)) {
2273 redraw_view(view);
2275 } else {
2276 int line = lines > 0 ? view->height - lines : 0;
2277 int end = line + ABS(lines);
2279 scrollok(view->win, TRUE);
2280 wscrl(view->win, lines);
2281 scrollok(view->win, FALSE);
2283 while (line < end && draw_view_line(view, line))
2284 line++;
2286 if (redraw_current_line)
2287 draw_view_line(view, view->lineno - view->offset);
2288 /* FIXME: Stupid hack to workaround bug where the message from
2289 * scrolling up one line when impossible followed by scrolling
2290 * down one line is not removed by the next action. */
2291 if (lines > 0)
2292 report("");
2293 wrefresh(view->win);
2294 }
2296 report("");
2297 }
2299 /* Scroll frontend */
2300 static void
2301 scroll_view(struct view *view, enum request request)
2302 {
2303 int lines = 1;
2305 assert(view_is_displayed(view));
2307 switch (request) {
2308 case REQ_SCROLL_PAGE_DOWN:
2309 lines = view->height;
2310 case REQ_SCROLL_LINE_DOWN:
2311 if (view->offset + lines > view->lines)
2312 lines = view->lines - view->offset;
2314 if (lines == 0 || view->offset + view->height >= view->lines) {
2315 report("Cannot scroll beyond the last line");
2316 return;
2317 }
2318 break;
2320 case REQ_SCROLL_PAGE_UP:
2321 lines = view->height;
2322 case REQ_SCROLL_LINE_UP:
2323 if (lines > view->offset)
2324 lines = view->offset;
2326 if (lines == 0) {
2327 report("Cannot scroll beyond the first line");
2328 return;
2329 }
2331 lines = -lines;
2332 break;
2334 default:
2335 die("request %d not handled in switch", request);
2336 }
2338 do_scroll_view(view, lines);
2339 }
2341 /* Cursor moving */
2342 static void
2343 move_view(struct view *view, enum request request)
2344 {
2345 int scroll_steps = 0;
2346 int steps;
2348 switch (request) {
2349 case REQ_MOVE_FIRST_LINE:
2350 steps = -view->lineno;
2351 break;
2353 case REQ_MOVE_LAST_LINE:
2354 steps = view->lines - view->lineno - 1;
2355 break;
2357 case REQ_MOVE_PAGE_UP:
2358 steps = view->height > view->lineno
2359 ? -view->lineno : -view->height;
2360 break;
2362 case REQ_MOVE_PAGE_DOWN:
2363 steps = view->lineno + view->height >= view->lines
2364 ? view->lines - view->lineno - 1 : view->height;
2365 break;
2367 case REQ_MOVE_UP:
2368 steps = -1;
2369 break;
2371 case REQ_MOVE_DOWN:
2372 steps = 1;
2373 break;
2375 default:
2376 die("request %d not handled in switch", request);
2377 }
2379 if (steps <= 0 && view->lineno == 0) {
2380 report("Cannot move beyond the first line");
2381 return;
2383 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2384 report("Cannot move beyond the last line");
2385 return;
2386 }
2388 /* Move the current line */
2389 view->lineno += steps;
2390 assert(0 <= view->lineno && view->lineno < view->lines);
2392 /* Check whether the view needs to be scrolled */
2393 if (view->lineno < view->offset ||
2394 view->lineno >= view->offset + view->height) {
2395 scroll_steps = steps;
2396 if (steps < 0 && -steps > view->offset) {
2397 scroll_steps = -view->offset;
2399 } else if (steps > 0) {
2400 if (view->lineno == view->lines - 1 &&
2401 view->lines > view->height) {
2402 scroll_steps = view->lines - view->offset - 1;
2403 if (scroll_steps >= view->height)
2404 scroll_steps -= view->height - 1;
2405 }
2406 }
2407 }
2409 if (!view_is_displayed(view)) {
2410 view->offset += scroll_steps;
2411 assert(0 <= view->offset && view->offset < view->lines);
2412 view->ops->select(view, &view->line[view->lineno]);
2413 return;
2414 }
2416 /* Repaint the old "current" line if we be scrolling */
2417 if (ABS(steps) < view->height)
2418 draw_view_line(view, view->lineno - steps - view->offset);
2420 if (scroll_steps) {
2421 do_scroll_view(view, scroll_steps);
2422 return;
2423 }
2425 /* Draw the current line */
2426 draw_view_line(view, view->lineno - view->offset);
2428 wrefresh(view->win);
2429 report("");
2430 }
2433 /*
2434 * Searching
2435 */
2437 static void search_view(struct view *view, enum request request);
2439 static void
2440 select_view_line(struct view *view, unsigned long lineno)
2441 {
2442 if (lineno - view->offset >= view->height) {
2443 view->offset = lineno;
2444 view->lineno = lineno;
2445 if (view_is_displayed(view))
2446 redraw_view(view);
2448 } else {
2449 unsigned long old_lineno = view->lineno - view->offset;
2451 view->lineno = lineno;
2452 if (view_is_displayed(view)) {
2453 draw_view_line(view, old_lineno);
2454 draw_view_line(view, view->lineno - view->offset);
2455 wrefresh(view->win);
2456 } else {
2457 view->ops->select(view, &view->line[view->lineno]);
2458 }
2459 }
2460 }
2462 static void
2463 find_next(struct view *view, enum request request)
2464 {
2465 unsigned long lineno = view->lineno;
2466 int direction;
2468 if (!*view->grep) {
2469 if (!*opt_search)
2470 report("No previous search");
2471 else
2472 search_view(view, request);
2473 return;
2474 }
2476 switch (request) {
2477 case REQ_SEARCH:
2478 case REQ_FIND_NEXT:
2479 direction = 1;
2480 break;
2482 case REQ_SEARCH_BACK:
2483 case REQ_FIND_PREV:
2484 direction = -1;
2485 break;
2487 default:
2488 return;
2489 }
2491 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2492 lineno += direction;
2494 /* Note, lineno is unsigned long so will wrap around in which case it
2495 * will become bigger than view->lines. */
2496 for (; lineno < view->lines; lineno += direction) {
2497 if (view->ops->grep(view, &view->line[lineno])) {
2498 select_view_line(view, lineno);
2499 report("Line %ld matches '%s'", lineno + 1, view->grep);
2500 return;
2501 }
2502 }
2504 report("No match found for '%s'", view->grep);
2505 }
2507 static void
2508 search_view(struct view *view, enum request request)
2509 {
2510 int regex_err;
2512 if (view->regex) {
2513 regfree(view->regex);
2514 *view->grep = 0;
2515 } else {
2516 view->regex = calloc(1, sizeof(*view->regex));
2517 if (!view->regex)
2518 return;
2519 }
2521 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2522 if (regex_err != 0) {
2523 char buf[SIZEOF_STR] = "unknown error";
2525 regerror(regex_err, view->regex, buf, sizeof(buf));
2526 report("Search failed: %s", buf);
2527 return;
2528 }
2530 string_copy(view->grep, opt_search);
2532 find_next(view, request);
2533 }
2535 /*
2536 * Incremental updating
2537 */
2539 static void
2540 reset_view(struct view *view)
2541 {
2542 int i;
2544 for (i = 0; i < view->lines; i++)
2545 free(view->line[i].data);
2546 free(view->line);
2548 view->p_offset = view->offset;
2549 view->p_lineno = view->lineno;
2551 view->line = NULL;
2552 view->offset = 0;
2553 view->lines = 0;
2554 view->lineno = 0;
2555 view->line_alloc = 0;
2556 view->vid[0] = 0;
2557 view->update_secs = 0;
2558 }
2560 static void
2561 free_argv(const char *argv[])
2562 {
2563 int argc;
2565 for (argc = 0; argv[argc]; argc++)
2566 free((void *) argv[argc]);
2567 }
2569 static bool
2570 format_argv(const char *dst_argv[], const char *src_argv[], enum format_flags flags)
2571 {
2572 char buf[SIZEOF_STR];
2573 int argc;
2574 bool noreplace = flags == FORMAT_NONE;
2576 free_argv(dst_argv);
2578 for (argc = 0; src_argv[argc]; argc++) {
2579 const char *arg = src_argv[argc];
2580 size_t bufpos = 0;
2582 while (arg) {
2583 char *next = strstr(arg, "%(");
2584 int len = next - arg;
2585 const char *value;
2587 if (!next || noreplace) {
2588 if (flags == FORMAT_DASH && !strcmp(arg, "--"))
2589 noreplace = TRUE;
2590 len = strlen(arg);
2591 value = "";
2593 } else if (!prefixcmp(next, "%(directory)")) {
2594 value = opt_path;
2596 } else if (!prefixcmp(next, "%(file)")) {
2597 value = opt_file;
2599 } else if (!prefixcmp(next, "%(ref)")) {
2600 value = *opt_ref ? opt_ref : "HEAD";
2602 } else if (!prefixcmp(next, "%(head)")) {
2603 value = ref_head;
2605 } else if (!prefixcmp(next, "%(commit)")) {
2606 value = ref_commit;
2608 } else if (!prefixcmp(next, "%(blob)")) {
2609 value = ref_blob;
2611 } else {
2612 report("Unknown replacement: `%s`", next);
2613 return FALSE;
2614 }
2616 if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2617 return FALSE;
2619 arg = next && !noreplace ? strchr(next, ')') + 1 : NULL;
2620 }
2622 dst_argv[argc] = strdup(buf);
2623 if (!dst_argv[argc])
2624 break;
2625 }
2627 dst_argv[argc] = NULL;
2629 return src_argv[argc] == NULL;
2630 }
2632 static bool
2633 restore_view_position(struct view *view)
2634 {
2635 if (!view->p_restore || (view->pipe && view->lines <= view->p_lineno))
2636 return FALSE;
2638 /* Changing the view position cancels the restoring. */
2639 /* FIXME: Changing back to the first line is not detected. */
2640 if (view->offset != 0 || view->lineno != 0) {
2641 view->p_restore = FALSE;
2642 return FALSE;
2643 }
2645 if (view->p_lineno >= view->lines) {
2646 view->p_lineno = view->lines > 0 ? view->lines - 1 : 0;
2647 if (view->p_offset >= view->p_lineno) {
2648 unsigned long half = view->height / 2;
2650 if (view->p_lineno > half)
2651 view->p_offset = view->p_lineno - half;
2652 else
2653 view->p_offset = 0;
2654 }
2655 }
2657 if (view_is_displayed(view) &&
2658 view->offset != view->p_offset &&
2659 view->lineno != view->p_lineno)
2660 werase(view->win);
2662 view->offset = view->p_offset;
2663 view->lineno = view->p_lineno;
2664 view->p_restore = FALSE;
2666 return TRUE;
2667 }
2669 static void
2670 end_update(struct view *view, bool force)
2671 {
2672 if (!view->pipe)
2673 return;
2674 while (!view->ops->read(view, NULL))
2675 if (!force)
2676 return;
2677 set_nonblocking_input(FALSE);
2678 if (force)
2679 kill_io(view->pipe);
2680 done_io(view->pipe);
2681 view->pipe = NULL;
2682 }
2684 static void
2685 setup_update(struct view *view, const char *vid)
2686 {
2687 set_nonblocking_input(TRUE);
2688 reset_view(view);
2689 string_copy_rev(view->vid, vid);
2690 view->pipe = &view->io;
2691 view->start_time = time(NULL);
2692 }
2694 static bool
2695 prepare_update(struct view *view, const char *argv[], const char *dir,
2696 enum format_flags flags)
2697 {
2698 if (view->pipe)
2699 end_update(view, TRUE);
2700 return init_io_rd(&view->io, argv, dir, flags);
2701 }
2703 static bool
2704 prepare_update_file(struct view *view, const char *name)
2705 {
2706 if (view->pipe)
2707 end_update(view, TRUE);
2708 return io_open(&view->io, name);
2709 }
2711 static bool
2712 begin_update(struct view *view, bool refresh)
2713 {
2714 if (view->pipe)
2715 end_update(view, TRUE);
2717 if (refresh) {
2718 if (!start_io(&view->io))
2719 return FALSE;
2721 } else {
2722 if (view == VIEW(REQ_VIEW_TREE) && strcmp(view->vid, view->id))
2723 opt_path[0] = 0;
2725 if (!run_io_rd(&view->io, view->ops->argv, FORMAT_ALL))
2726 return FALSE;
2728 /* Put the current ref_* value to the view title ref
2729 * member. This is needed by the blob view. Most other
2730 * views sets it automatically after loading because the
2731 * first line is a commit line. */
2732 string_copy_rev(view->ref, view->id);
2733 }
2735 setup_update(view, view->id);
2737 return TRUE;
2738 }
2740 #define ITEM_CHUNK_SIZE 256
2741 static void *
2742 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2743 {
2744 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2745 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2747 if (mem == NULL || num_chunks != num_chunks_new) {
2748 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2749 mem = realloc(mem, *size * item_size);
2750 }
2752 return mem;
2753 }
2755 static struct line *
2756 realloc_lines(struct view *view, size_t line_size)
2757 {
2758 size_t alloc = view->line_alloc;
2759 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2760 sizeof(*view->line));
2762 if (!tmp)
2763 return NULL;
2765 view->line = tmp;
2766 view->line_alloc = alloc;
2767 return view->line;
2768 }
2770 static bool
2771 update_view(struct view *view)
2772 {
2773 char out_buffer[BUFSIZ * 2];
2774 char *line;
2775 /* Clear the view and redraw everything since the tree sorting
2776 * might have rearranged things. */
2777 bool redraw = view->lines == 0;
2778 bool can_read = TRUE;
2780 if (!view->pipe)
2781 return TRUE;
2783 if (!io_can_read(view->pipe)) {
2784 if (view->lines == 0) {
2785 time_t secs = time(NULL) - view->start_time;
2787 if (secs > view->update_secs) {
2788 if (view->update_secs == 0)
2789 redraw_view(view);
2790 update_view_title(view);
2791 view->update_secs = secs;
2792 }
2793 }
2794 return TRUE;
2795 }
2797 for (; (line = io_get(view->pipe, '\n', can_read)); can_read = FALSE) {
2798 if (opt_iconv != ICONV_NONE) {
2799 ICONV_CONST char *inbuf = line;
2800 size_t inlen = strlen(line) + 1;
2802 char *outbuf = out_buffer;
2803 size_t outlen = sizeof(out_buffer);
2805 size_t ret;
2807 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2808 if (ret != (size_t) -1)
2809 line = out_buffer;
2810 }
2812 if (!view->ops->read(view, line)) {
2813 report("Allocation failure");
2814 end_update(view, TRUE);
2815 return FALSE;
2816 }
2817 }
2819 {
2820 unsigned long lines = view->lines;
2821 int digits;
2823 for (digits = 0; lines; digits++)
2824 lines /= 10;
2826 /* Keep the displayed view in sync with line number scaling. */
2827 if (digits != view->digits) {
2828 view->digits = digits;
2829 if (opt_line_number || view == VIEW(REQ_VIEW_BLAME))
2830 redraw = TRUE;
2831 }
2832 }
2834 if (io_error(view->pipe)) {
2835 report("Failed to read: %s", io_strerror(view->pipe));
2836 end_update(view, TRUE);
2838 } else if (io_eof(view->pipe)) {
2839 report("");
2840 end_update(view, FALSE);
2841 }
2843 if (restore_view_position(view))
2844 redraw = TRUE;
2846 if (!view_is_displayed(view))
2847 return TRUE;
2849 if (redraw)
2850 redraw_view_from(view, 0);
2851 else
2852 redraw_view_dirty(view);
2854 /* Update the title _after_ the redraw so that if the redraw picks up a
2855 * commit reference in view->ref it'll be available here. */
2856 update_view_title(view);
2857 update_display_cursor(view);
2858 return TRUE;
2859 }
2861 static struct line *
2862 add_line_data(struct view *view, void *data, enum line_type type)
2863 {
2864 struct line *line;
2866 if (!realloc_lines(view, view->lines + 1))
2867 return NULL;
2869 line = &view->line[view->lines++];
2870 memset(line, 0, sizeof(*line));
2871 line->type = type;
2872 line->data = data;
2873 line->dirty = 1;
2875 return line;
2876 }
2878 static struct line *
2879 add_line_text(struct view *view, const char *text, enum line_type type)
2880 {
2881 char *data = text ? strdup(text) : NULL;
2883 return data ? add_line_data(view, data, type) : NULL;
2884 }
2886 static struct line *
2887 add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
2888 {
2889 char buf[SIZEOF_STR];
2890 va_list args;
2892 va_start(args, fmt);
2893 if (vsnprintf(buf, sizeof(buf), fmt, args) >= sizeof(buf))
2894 buf[0] = 0;
2895 va_end(args);
2897 return buf[0] ? add_line_text(view, buf, type) : NULL;
2898 }
2900 /*
2901 * View opening
2902 */
2904 enum open_flags {
2905 OPEN_DEFAULT = 0, /* Use default view switching. */
2906 OPEN_SPLIT = 1, /* Split current view. */
2907 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2908 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2909 OPEN_NOMAXIMIZE = 8, /* Do not maximize the current view. */
2910 OPEN_REFRESH = 16, /* Refresh view using previous command. */
2911 OPEN_PREPARED = 32, /* Open already prepared command. */
2912 };
2914 static void
2915 open_view(struct view *prev, enum request request, enum open_flags flags)
2916 {
2917 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2918 bool split = !!(flags & OPEN_SPLIT);
2919 bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
2920 bool nomaximize = !!(flags & (OPEN_NOMAXIMIZE | OPEN_REFRESH));
2921 struct view *view = VIEW(request);
2922 int nviews = displayed_views();
2923 struct view *base_view = display[0];
2925 if (view == prev && nviews == 1 && !reload) {
2926 report("Already in %s view", view->name);
2927 return;
2928 }
2930 if (view->git_dir && !opt_git_dir[0]) {
2931 report("The %s view is disabled in pager view", view->name);
2932 return;
2933 }
2935 if (split) {
2936 display[1] = view;
2937 if (!backgrounded)
2938 current_view = 1;
2939 } else if (!nomaximize) {
2940 /* Maximize the current view. */
2941 memset(display, 0, sizeof(display));
2942 current_view = 0;
2943 display[current_view] = view;
2944 }
2946 /* Resize the view when switching between split- and full-screen,
2947 * or when switching between two different full-screen views. */
2948 if (nviews != displayed_views() ||
2949 (nviews == 1 && base_view != display[0]))
2950 resize_display();
2952 if (view->ops->open) {
2953 if (view->pipe)
2954 end_update(view, TRUE);
2955 if (!view->ops->open(view)) {
2956 report("Failed to load %s view", view->name);
2957 return;
2958 }
2959 restore_view_position(view);
2961 } else if ((reload || strcmp(view->vid, view->id)) &&
2962 !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
2963 report("Failed to load %s view", view->name);
2964 return;
2965 }
2967 if (split && prev->lineno - prev->offset >= prev->height) {
2968 /* Take the title line into account. */
2969 int lines = prev->lineno - prev->offset - prev->height + 1;
2971 /* Scroll the view that was split if the current line is
2972 * outside the new limited view. */
2973 do_scroll_view(prev, lines);
2974 }
2976 if (prev && view != prev) {
2977 if (split && !backgrounded) {
2978 /* "Blur" the previous view. */
2979 update_view_title(prev);
2980 }
2982 view->parent = prev;
2983 }
2985 if (view->pipe && view->lines == 0) {
2986 /* Clear the old view and let the incremental updating refill
2987 * the screen. */
2988 werase(view->win);
2989 view->p_restore = flags & (OPEN_RELOAD | OPEN_REFRESH);
2990 report("");
2991 } else if (view_is_displayed(view)) {
2992 redraw_view(view);
2993 report("");
2994 }
2996 /* If the view is backgrounded the above calls to report()
2997 * won't redraw the view title. */
2998 if (backgrounded)
2999 update_view_title(view);
3000 }
3002 static void
3003 open_external_viewer(const char *argv[], const char *dir)
3004 {
3005 def_prog_mode(); /* save current tty modes */
3006 endwin(); /* restore original tty modes */
3007 run_io_fg(argv, dir);
3008 fprintf(stderr, "Press Enter to continue");
3009 getc(opt_tty);
3010 reset_prog_mode();
3011 redraw_display(TRUE);
3012 }
3014 static void
3015 open_mergetool(const char *file)
3016 {
3017 const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
3019 open_external_viewer(mergetool_argv, opt_cdup);
3020 }
3022 static void
3023 open_editor(bool from_root, const char *file)
3024 {
3025 const char *editor_argv[] = { "vi", file, NULL };
3026 const char *editor;
3028 editor = getenv("GIT_EDITOR");
3029 if (!editor && *opt_editor)
3030 editor = opt_editor;
3031 if (!editor)
3032 editor = getenv("VISUAL");
3033 if (!editor)
3034 editor = getenv("EDITOR");
3035 if (!editor)
3036 editor = "vi";
3038 editor_argv[0] = editor;
3039 open_external_viewer(editor_argv, from_root ? opt_cdup : NULL);
3040 }
3042 static void
3043 open_run_request(enum request request)
3044 {
3045 struct run_request *req = get_run_request(request);
3046 const char *argv[ARRAY_SIZE(req->argv)] = { NULL };
3048 if (!req) {
3049 report("Unknown run request");
3050 return;
3051 }
3053 if (format_argv(argv, req->argv, FORMAT_ALL))
3054 open_external_viewer(argv, NULL);
3055 free_argv(argv);
3056 }
3058 /*
3059 * User request switch noodle
3060 */
3062 static int
3063 view_driver(struct view *view, enum request request)
3064 {
3065 int i;
3067 if (request == REQ_NONE) {
3068 doupdate();
3069 return TRUE;
3070 }
3072 if (request > REQ_NONE) {
3073 open_run_request(request);
3074 /* FIXME: When all views can refresh always do this. */
3075 if (view == VIEW(REQ_VIEW_STATUS) ||
3076 view == VIEW(REQ_VIEW_MAIN) ||
3077 view == VIEW(REQ_VIEW_LOG) ||
3078 view == VIEW(REQ_VIEW_STAGE))
3079 request = REQ_REFRESH;
3080 else
3081 return TRUE;
3082 }
3084 if (view && view->lines) {
3085 request = view->ops->request(view, request, &view->line[view->lineno]);
3086 if (request == REQ_NONE)
3087 return TRUE;
3088 }
3090 switch (request) {
3091 case REQ_MOVE_UP:
3092 case REQ_MOVE_DOWN:
3093 case REQ_MOVE_PAGE_UP:
3094 case REQ_MOVE_PAGE_DOWN:
3095 case REQ_MOVE_FIRST_LINE:
3096 case REQ_MOVE_LAST_LINE:
3097 move_view(view, request);
3098 break;
3100 case REQ_SCROLL_LINE_DOWN:
3101 case REQ_SCROLL_LINE_UP:
3102 case REQ_SCROLL_PAGE_DOWN:
3103 case REQ_SCROLL_PAGE_UP:
3104 scroll_view(view, request);
3105 break;
3107 case REQ_VIEW_BLAME:
3108 if (!opt_file[0]) {
3109 report("No file chosen, press %s to open tree view",
3110 get_key(REQ_VIEW_TREE));
3111 break;
3112 }
3113 open_view(view, request, OPEN_DEFAULT);
3114 break;
3116 case REQ_VIEW_BLOB:
3117 if (!ref_blob[0]) {
3118 report("No file chosen, press %s to open tree view",
3119 get_key(REQ_VIEW_TREE));
3120 break;
3121 }
3122 open_view(view, request, OPEN_DEFAULT);
3123 break;
3125 case REQ_VIEW_PAGER:
3126 if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
3127 report("No pager content, press %s to run command from prompt",
3128 get_key(REQ_PROMPT));
3129 break;
3130 }
3131 open_view(view, request, OPEN_DEFAULT);
3132 break;
3134 case REQ_VIEW_STAGE:
3135 if (!VIEW(REQ_VIEW_STAGE)->lines) {
3136 report("No stage content, press %s to open the status view and choose file",
3137 get_key(REQ_VIEW_STATUS));
3138 break;
3139 }
3140 open_view(view, request, OPEN_DEFAULT);
3141 break;
3143 case REQ_VIEW_STATUS:
3144 if (opt_is_inside_work_tree == FALSE) {
3145 report("The status view requires a working tree");
3146 break;
3147 }
3148 open_view(view, request, OPEN_DEFAULT);
3149 break;
3151 case REQ_VIEW_MAIN:
3152 case REQ_VIEW_DIFF:
3153 case REQ_VIEW_LOG:
3154 case REQ_VIEW_TREE:
3155 case REQ_VIEW_HELP:
3156 open_view(view, request, OPEN_DEFAULT);
3157 break;
3159 case REQ_NEXT:
3160 case REQ_PREVIOUS:
3161 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
3163 if ((view == VIEW(REQ_VIEW_DIFF) &&
3164 view->parent == VIEW(REQ_VIEW_MAIN)) ||
3165 (view == VIEW(REQ_VIEW_DIFF) &&
3166 view->parent == VIEW(REQ_VIEW_BLAME)) ||
3167 (view == VIEW(REQ_VIEW_STAGE) &&
3168 view->parent == VIEW(REQ_VIEW_STATUS)) ||
3169 (view == VIEW(REQ_VIEW_BLOB) &&
3170 view->parent == VIEW(REQ_VIEW_TREE))) {
3171 int line;
3173 view = view->parent;
3174 line = view->lineno;
3175 move_view(view, request);
3176 if (view_is_displayed(view))
3177 update_view_title(view);
3178 if (line != view->lineno)
3179 view->ops->request(view, REQ_ENTER,
3180 &view->line[view->lineno]);
3182 } else {
3183 move_view(view, request);
3184 }
3185 break;
3187 case REQ_VIEW_NEXT:
3188 {
3189 int nviews = displayed_views();
3190 int next_view = (current_view + 1) % nviews;
3192 if (next_view == current_view) {
3193 report("Only one view is displayed");
3194 break;
3195 }
3197 current_view = next_view;
3198 /* Blur out the title of the previous view. */
3199 update_view_title(view);
3200 report("");
3201 break;
3202 }
3203 case REQ_REFRESH:
3204 report("Refreshing is not yet supported for the %s view", view->name);
3205 break;
3207 case REQ_MAXIMIZE:
3208 if (displayed_views() == 2)
3209 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
3210 break;
3212 case REQ_TOGGLE_LINENO:
3213 toggle_view_option(&opt_line_number, "line numbers");
3214 break;
3216 case REQ_TOGGLE_DATE:
3217 toggle_view_option(&opt_date, "date display");
3218 break;
3220 case REQ_TOGGLE_AUTHOR:
3221 toggle_view_option(&opt_author, "author display");
3222 break;
3224 case REQ_TOGGLE_REV_GRAPH:
3225 toggle_view_option(&opt_rev_graph, "revision graph display");
3226 break;
3228 case REQ_TOGGLE_REFS:
3229 toggle_view_option(&opt_show_refs, "reference display");
3230 break;
3232 case REQ_SEARCH:
3233 case REQ_SEARCH_BACK:
3234 search_view(view, request);
3235 break;
3237 case REQ_FIND_NEXT:
3238 case REQ_FIND_PREV:
3239 find_next(view, request);
3240 break;
3242 case REQ_STOP_LOADING:
3243 for (i = 0; i < ARRAY_SIZE(views); i++) {
3244 view = &views[i];
3245 if (view->pipe)
3246 report("Stopped loading the %s view", view->name),
3247 end_update(view, TRUE);
3248 }
3249 break;
3251 case REQ_SHOW_VERSION:
3252 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3253 return TRUE;
3255 case REQ_SCREEN_REDRAW:
3256 redraw_display(TRUE);
3257 break;
3259 case REQ_EDIT:
3260 report("Nothing to edit");
3261 break;
3263 case REQ_ENTER:
3264 report("Nothing to enter");
3265 break;
3267 case REQ_VIEW_CLOSE:
3268 /* XXX: Mark closed views by letting view->parent point to the
3269 * view itself. Parents to closed view should never be
3270 * followed. */
3271 if (view->parent &&
3272 view->parent->parent != view->parent) {
3273 memset(display, 0, sizeof(display));
3274 current_view = 0;
3275 display[current_view] = view->parent;
3276 view->parent = view;
3277 resize_display();
3278 redraw_display(FALSE);
3279 report("");
3280 break;
3281 }
3282 /* Fall-through */
3283 case REQ_QUIT:
3284 return FALSE;
3286 default:
3287 report("Unknown key, press 'h' for help");
3288 return TRUE;
3289 }
3291 return TRUE;
3292 }
3295 /*
3296 * View backend utilities
3297 */
3299 /* Parse author lines where the name may be empty:
3300 * author <email@address.tld> 1138474660 +0100
3301 */
3302 static void
3303 parse_author_line(char *ident, char *author, size_t authorsize, struct tm *tm)
3304 {
3305 char *nameend = strchr(ident, '<');
3306 char *emailend = strchr(ident, '>');
3308 if (nameend && emailend)
3309 *nameend = *emailend = 0;
3310 ident = chomp_string(ident);
3311 if (!*ident) {
3312 if (nameend)
3313 ident = chomp_string(nameend + 1);
3314 if (!*ident)
3315 ident = "Unknown";
3316 }
3318 string_ncopy_do(author, authorsize, ident, strlen(ident));
3320 /* Parse epoch and timezone */
3321 if (emailend && emailend[1] == ' ') {
3322 char *secs = emailend + 2;
3323 char *zone = strchr(secs, ' ');
3324 time_t time = (time_t) atol(secs);
3326 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3327 long tz;
3329 zone++;
3330 tz = ('0' - zone[1]) * 60 * 60 * 10;
3331 tz += ('0' - zone[2]) * 60 * 60;
3332 tz += ('0' - zone[3]) * 60;
3333 tz += ('0' - zone[4]) * 60;
3335 if (zone[0] == '-')
3336 tz = -tz;
3338 time -= tz;
3339 }
3341 gmtime_r(&time, tm);
3342 }
3343 }
3345 static enum input_status
3346 select_commit_parent_handler(void *data, char *buf, int c)
3347 {
3348 size_t parents = *(size_t *) data;
3349 int parent = 0;
3351 if (!isdigit(c))
3352 return INPUT_SKIP;
3354 if (*buf)
3355 parent = atoi(buf) * 10;
3356 parent += c - '0';
3358 if (parent > parents)
3359 return INPUT_SKIP;
3360 return INPUT_OK;
3361 }
3363 static bool
3364 select_commit_parent(const char *id, char rev[SIZEOF_REV])
3365 {
3366 char buf[SIZEOF_STR * 4];
3367 const char *revlist_argv[] = {
3368 "git", "rev-list", "-1", "--parents", id, NULL
3369 };
3370 int parents;
3372 if (!run_io_buf(revlist_argv, buf, sizeof(buf)) ||
3373 !*chomp_string(buf) ||
3374 (parents = (strlen(buf) / 40) - 1) < 0) {
3375 report("Failed to get parent information");
3376 return FALSE;
3378 } else if (parents == 0) {
3379 report("The selected commit has no parents");
3380 return FALSE;
3381 }
3383 if (parents > 1) {
3384 char prompt[SIZEOF_STR];
3385 char *result;
3387 if (!string_format(prompt, "Which parent? [1..%d] ", parents))
3388 return FALSE;
3389 result = prompt_input(prompt, select_commit_parent_handler, &parents);
3390 if (!result)
3391 return FALSE;
3392 parents = atoi(result);
3393 }
3395 string_copy_rev(rev, &buf[41 * parents]);
3396 return TRUE;
3397 }
3399 /*
3400 * Pager backend
3401 */
3403 static bool
3404 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3405 {
3406 char *text = line->data;
3408 if (opt_line_number && draw_lineno(view, lineno))
3409 return TRUE;
3411 draw_text(view, line->type, text, TRUE);
3412 return TRUE;
3413 }
3415 static bool
3416 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3417 {
3418 const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3419 char refbuf[SIZEOF_STR];
3420 char *ref = NULL;
3422 if (run_io_buf(describe_argv, refbuf, sizeof(refbuf)))
3423 ref = chomp_string(refbuf);
3425 if (!ref || !*ref)
3426 return TRUE;
3428 /* This is the only fatal call, since it can "corrupt" the buffer. */
3429 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3430 return FALSE;
3432 return TRUE;
3433 }
3435 static void
3436 add_pager_refs(struct view *view, struct line *line)
3437 {
3438 char buf[SIZEOF_STR];
3439 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3440 struct ref **refs;
3441 size_t bufpos = 0, refpos = 0;
3442 const char *sep = "Refs: ";
3443 bool is_tag = FALSE;
3445 assert(line->type == LINE_COMMIT);
3447 refs = get_refs(commit_id);
3448 if (!refs) {
3449 if (view == VIEW(REQ_VIEW_DIFF))
3450 goto try_add_describe_ref;
3451 return;
3452 }
3454 do {
3455 struct ref *ref = refs[refpos];
3456 const char *fmt = ref->tag ? "%s[%s]" :
3457 ref->remote ? "%s<%s>" : "%s%s";
3459 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3460 return;
3461 sep = ", ";
3462 if (ref->tag)
3463 is_tag = TRUE;
3464 } while (refs[refpos++]->next);
3466 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
3467 try_add_describe_ref:
3468 /* Add <tag>-g<commit_id> "fake" reference. */
3469 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3470 return;
3471 }
3473 if (bufpos == 0)
3474 return;
3476 add_line_text(view, buf, LINE_PP_REFS);
3477 }
3479 static bool
3480 pager_read(struct view *view, char *data)
3481 {
3482 struct line *line;
3484 if (!data)
3485 return TRUE;
3487 line = add_line_text(view, data, get_line_type(data));
3488 if (!line)
3489 return FALSE;
3491 if (line->type == LINE_COMMIT &&
3492 (view == VIEW(REQ_VIEW_DIFF) ||
3493 view == VIEW(REQ_VIEW_LOG)))
3494 add_pager_refs(view, line);
3496 return TRUE;
3497 }
3499 static enum request
3500 pager_request(struct view *view, enum request request, struct line *line)
3501 {
3502 int split = 0;
3504 if (request != REQ_ENTER)
3505 return request;
3507 if (line->type == LINE_COMMIT &&
3508 (view == VIEW(REQ_VIEW_LOG) ||
3509 view == VIEW(REQ_VIEW_PAGER))) {
3510 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3511 split = 1;
3512 }
3514 /* Always scroll the view even if it was split. That way
3515 * you can use Enter to scroll through the log view and
3516 * split open each commit diff. */
3517 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3519 /* FIXME: A minor workaround. Scrolling the view will call report("")
3520 * but if we are scrolling a non-current view this won't properly
3521 * update the view title. */
3522 if (split)
3523 update_view_title(view);
3525 return REQ_NONE;
3526 }
3528 static bool
3529 pager_grep(struct view *view, struct line *line)
3530 {
3531 regmatch_t pmatch;
3532 char *text = line->data;
3534 if (!*text)
3535 return FALSE;
3537 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3538 return FALSE;
3540 return TRUE;
3541 }
3543 static void
3544 pager_select(struct view *view, struct line *line)
3545 {
3546 if (line->type == LINE_COMMIT) {
3547 char *text = (char *)line->data + STRING_SIZE("commit ");
3549 if (view != VIEW(REQ_VIEW_PAGER))
3550 string_copy_rev(view->ref, text);
3551 string_copy_rev(ref_commit, text);
3552 }
3553 }
3555 static struct view_ops pager_ops = {
3556 "line",
3557 NULL,
3558 NULL,
3559 pager_read,
3560 pager_draw,
3561 pager_request,
3562 pager_grep,
3563 pager_select,
3564 };
3566 static const char *log_argv[SIZEOF_ARG] = {
3567 "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3568 };
3570 static enum request
3571 log_request(struct view *view, enum request request, struct line *line)
3572 {
3573 switch (request) {
3574 case REQ_REFRESH:
3575 load_refs();
3576 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3577 return REQ_NONE;
3578 default:
3579 return pager_request(view, request, line);
3580 }
3581 }
3583 static struct view_ops log_ops = {
3584 "line",
3585 log_argv,
3586 NULL,
3587 pager_read,
3588 pager_draw,
3589 log_request,
3590 pager_grep,
3591 pager_select,
3592 };
3594 static const char *diff_argv[SIZEOF_ARG] = {
3595 "git", "show", "--pretty=fuller", "--no-color", "--root",
3596 "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
3597 };
3599 static struct view_ops diff_ops = {
3600 "line",
3601 diff_argv,
3602 NULL,
3603 pager_read,
3604 pager_draw,
3605 pager_request,
3606 pager_grep,
3607 pager_select,
3608 };
3610 /*
3611 * Help backend
3612 */
3614 static bool
3615 help_open(struct view *view)
3616 {
3617 char buf[SIZEOF_STR];
3618 size_t bufpos;
3619 int i;
3621 if (view->lines > 0)
3622 return TRUE;
3624 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3626 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3627 const char *key;
3629 if (req_info[i].request == REQ_NONE)
3630 continue;
3632 if (!req_info[i].request) {
3633 add_line_text(view, "", LINE_DEFAULT);
3634 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3635 continue;
3636 }
3638 key = get_key(req_info[i].request);
3639 if (!*key)
3640 key = "(no key defined)";
3642 for (bufpos = 0; bufpos <= req_info[i].namelen; bufpos++) {
3643 buf[bufpos] = tolower(req_info[i].name[bufpos]);
3644 if (buf[bufpos] == '_')
3645 buf[bufpos] = '-';
3646 }
3648 add_line_format(view, LINE_DEFAULT, " %-25s %-20s %s",
3649 key, buf, req_info[i].help);
3650 }
3652 if (run_requests) {
3653 add_line_text(view, "", LINE_DEFAULT);
3654 add_line_text(view, "External commands:", LINE_DEFAULT);
3655 }
3657 for (i = 0; i < run_requests; i++) {
3658 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3659 const char *key;
3660 int argc;
3662 if (!req)
3663 continue;
3665 key = get_key_name(req->key);
3666 if (!*key)
3667 key = "(no key defined)";
3669 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3670 if (!string_format_from(buf, &bufpos, "%s%s",
3671 argc ? " " : "", req->argv[argc]))
3672 return REQ_NONE;
3674 add_line_format(view, LINE_DEFAULT, " %-10s %-14s `%s`",
3675 keymap_table[req->keymap].name, key, buf);
3676 }
3678 return TRUE;
3679 }
3681 static struct view_ops help_ops = {
3682 "line",
3683 NULL,
3684 help_open,
3685 NULL,
3686 pager_draw,
3687 pager_request,
3688 pager_grep,
3689 pager_select,
3690 };
3693 /*
3694 * Tree backend
3695 */
3697 struct tree_stack_entry {
3698 struct tree_stack_entry *prev; /* Entry below this in the stack */
3699 unsigned long lineno; /* Line number to restore */
3700 char *name; /* Position of name in opt_path */
3701 };
3703 /* The top of the path stack. */
3704 static struct tree_stack_entry *tree_stack = NULL;
3705 unsigned long tree_lineno = 0;
3707 static void
3708 pop_tree_stack_entry(void)
3709 {
3710 struct tree_stack_entry *entry = tree_stack;
3712 tree_lineno = entry->lineno;
3713 entry->name[0] = 0;
3714 tree_stack = entry->prev;
3715 free(entry);
3716 }
3718 static void
3719 push_tree_stack_entry(const char *name, unsigned long lineno)
3720 {
3721 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3722 size_t pathlen = strlen(opt_path);
3724 if (!entry)
3725 return;
3727 entry->prev = tree_stack;
3728 entry->name = opt_path + pathlen;
3729 tree_stack = entry;
3731 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3732 pop_tree_stack_entry();
3733 return;
3734 }
3736 /* Move the current line to the first tree entry. */
3737 tree_lineno = 1;
3738 entry->lineno = lineno;
3739 }
3741 /* Parse output from git-ls-tree(1):
3742 *
3743 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
3744 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
3745 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3746 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
3747 */
3749 #define SIZEOF_TREE_ATTR \
3750 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
3752 #define SIZEOF_TREE_MODE \
3753 STRING_SIZE("100644 ")
3755 #define TREE_ID_OFFSET \
3756 STRING_SIZE("100644 blob ")
3758 struct tree_entry {
3759 char id[SIZEOF_REV];
3760 mode_t mode;
3761 struct tm time; /* Date from the author ident. */
3762 char author[75]; /* Author of the commit. */
3763 char name[1];
3764 };
3766 static const char *
3767 tree_path(struct line *line)
3768 {
3769 return ((struct tree_entry *) line->data)->name;
3770 }
3773 static int
3774 tree_compare_entry(struct line *line1, struct line *line2)
3775 {
3776 if (line1->type != line2->type)
3777 return line1->type == LINE_TREE_DIR ? -1 : 1;
3778 return strcmp(tree_path(line1), tree_path(line2));
3779 }
3781 static struct line *
3782 tree_entry(struct view *view, enum line_type type, const char *path,
3783 const char *mode, const char *id)
3784 {
3785 struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
3786 struct line *line = entry ? add_line_data(view, entry, type) : NULL;
3788 if (!entry || !line) {
3789 free(entry);
3790 return NULL;
3791 }
3793 strncpy(entry->name, path, strlen(path));
3794 if (mode)
3795 entry->mode = strtoul(mode, NULL, 8);
3796 if (id)
3797 string_copy_rev(entry->id, id);
3799 return line;
3800 }
3802 static bool
3803 tree_read_date(struct view *view, char *text, bool *read_date)
3804 {
3805 static char author_name[SIZEOF_STR];
3806 static struct tm author_time;
3808 if (!text && *read_date) {
3809 *read_date = FALSE;
3810 return TRUE;
3812 } else if (!text) {
3813 char *path = *opt_path ? opt_path : ".";
3814 /* Find next entry to process */
3815 const char *log_file[] = {
3816 "git", "log", "--no-color", "--pretty=raw",
3817 "--cc", "--raw", view->id, "--", path, NULL
3818 };
3819 struct io io = {};
3821 if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
3822 report("Failed to load tree data");
3823 return TRUE;
3824 }
3826 done_io(view->pipe);
3827 view->io = io;
3828 *read_date = TRUE;
3829 return FALSE;
3831 } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
3832 parse_author_line(text + STRING_SIZE("author "),
3833 author_name, sizeof(author_name), &author_time);
3835 } else if (*text == ':') {
3836 char *pos;
3837 size_t annotated = 1;
3838 size_t i;
3840 pos = strchr(text, '\t');
3841 if (!pos)
3842 return TRUE;
3843 text = pos + 1;
3844 if (*opt_prefix && !strncmp(text, opt_prefix, strlen(opt_prefix)))
3845 text += strlen(opt_prefix);
3846 if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
3847 text += strlen(opt_path);
3848 pos = strchr(text, '/');
3849 if (pos)
3850 *pos = 0;
3852 for (i = 1; i < view->lines; i++) {
3853 struct line *line = &view->line[i];
3854 struct tree_entry *entry = line->data;
3856 annotated += !!*entry->author;
3857 if (*entry->author || strcmp(entry->name, text))
3858 continue;
3860 string_copy(entry->author, author_name);
3861 memcpy(&entry->time, &author_time, sizeof(entry->time));
3862 line->dirty = 1;
3863 break;
3864 }
3866 if (annotated == view->lines)
3867 kill_io(view->pipe);
3868 }
3869 return TRUE;
3870 }
3872 static bool
3873 tree_read(struct view *view, char *text)
3874 {
3875 static bool read_date = FALSE;
3876 struct tree_entry *data;
3877 struct line *entry, *line;
3878 enum line_type type;
3879 size_t textlen = text ? strlen(text) : 0;
3880 char *path = text + SIZEOF_TREE_ATTR;
3882 if (read_date || !text)
3883 return tree_read_date(view, text, &read_date);
3885 if (textlen <= SIZEOF_TREE_ATTR)
3886 return FALSE;
3887 if (view->lines == 0 &&
3888 !tree_entry(view, LINE_TREE_PARENT, opt_path, NULL, NULL))
3889 return FALSE;
3891 /* Strip the path part ... */
3892 if (*opt_path) {
3893 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3894 size_t striplen = strlen(opt_path);
3896 if (pathlen > striplen)
3897 memmove(path, path + striplen,
3898 pathlen - striplen + 1);
3900 /* Insert "link" to parent directory. */
3901 if (view->lines == 1 &&
3902 !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
3903 return FALSE;
3904 }
3906 type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
3907 entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
3908 if (!entry)
3909 return FALSE;
3910 data = entry->data;
3912 /* Skip "Directory ..." and ".." line. */
3913 for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
3914 if (tree_compare_entry(line, entry) <= 0)
3915 continue;
3917 memmove(line + 1, line, (entry - line) * sizeof(*entry));
3919 line->data = data;
3920 line->type = type;
3921 for (; line <= entry; line++)
3922 line->dirty = line->cleareol = 1;
3923 return TRUE;
3924 }
3926 if (tree_lineno > view->lineno) {
3927 view->lineno = tree_lineno;
3928 tree_lineno = 0;
3929 }
3931 return TRUE;
3932 }
3934 static bool
3935 tree_draw(struct view *view, struct line *line, unsigned int lineno)
3936 {
3937 struct tree_entry *entry = line->data;
3939 if (line->type == LINE_TREE_PARENT) {
3940 if (draw_text(view, line->type, "Directory path /", TRUE))
3941 return TRUE;
3942 } else {
3943 char mode[11] = "-r--r--r--";
3945 if (S_ISDIR(entry->mode)) {
3946 mode[3] = mode[6] = mode[9] = 'x';
3947 mode[0] = 'd';
3948 }
3949 if (S_ISLNK(entry->mode))
3950 mode[0] = 'l';
3951 if (entry->mode & S_IWUSR)
3952 mode[2] = 'w';
3953 if (entry->mode & S_IXUSR)
3954 mode[3] = 'x';
3955 if (entry->mode & S_IXGRP)
3956 mode[6] = 'x';
3957 if (entry->mode & S_IXOTH)
3958 mode[9] = 'x';
3959 if (draw_field(view, LINE_TREE_MODE, mode, 11, TRUE))
3960 return TRUE;
3962 if (opt_author && draw_author(view, entry->author))
3963 return TRUE;
3965 if (opt_date && draw_date(view, *entry->author ? &entry->time : NULL))
3966 return TRUE;
3967 }
3968 if (draw_text(view, line->type, entry->name, TRUE))
3969 return TRUE;
3970 return TRUE;
3971 }
3973 static void
3974 open_blob_editor()
3975 {
3976 char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
3977 int fd = mkstemp(file);
3979 if (fd == -1)
3980 report("Failed to create temporary file");
3981 else if (!run_io_append(blob_ops.argv, FORMAT_ALL, fd))
3982 report("Failed to save blob data to file");
3983 else
3984 open_editor(FALSE, file);
3985 if (fd != -1)
3986 unlink(file);
3987 }
3989 static enum request
3990 tree_request(struct view *view, enum request request, struct line *line)
3991 {
3992 enum open_flags flags;
3994 switch (request) {
3995 case REQ_VIEW_BLAME:
3996 if (line->type != LINE_TREE_FILE) {
3997 report("Blame only supported for files");
3998 return REQ_NONE;
3999 }
4001 string_copy(opt_ref, view->vid);
4002 return request;
4004 case REQ_EDIT:
4005 if (line->type != LINE_TREE_FILE) {
4006 report("Edit only supported for files");
4007 } else if (!is_head_commit(view->vid)) {
4008 open_blob_editor();
4009 } else {
4010 open_editor(TRUE, opt_file);
4011 }
4012 return REQ_NONE;
4014 case REQ_PARENT:
4015 if (!*opt_path) {
4016 /* quit view if at top of tree */
4017 return REQ_VIEW_CLOSE;
4018 }
4019 /* fake 'cd ..' */
4020 line = &view->line[1];
4021 break;
4023 case REQ_ENTER:
4024 break;
4026 default:
4027 return request;
4028 }
4030 /* Cleanup the stack if the tree view is at a different tree. */
4031 while (!*opt_path && tree_stack)
4032 pop_tree_stack_entry();
4034 switch (line->type) {
4035 case LINE_TREE_DIR:
4036 /* Depending on whether it is a subdir or parent (updir?) link
4037 * mangle the path buffer. */
4038 if (line == &view->line[1] && *opt_path) {
4039 pop_tree_stack_entry();
4041 } else {
4042 const char *basename = tree_path(line);
4044 push_tree_stack_entry(basename, view->lineno);
4045 }
4047 /* Trees and subtrees share the same ID, so they are not not
4048 * unique like blobs. */
4049 flags = OPEN_RELOAD;
4050 request = REQ_VIEW_TREE;
4051 break;
4053 case LINE_TREE_FILE:
4054 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4055 request = REQ_VIEW_BLOB;
4056 break;
4058 default:
4059 return REQ_NONE;
4060 }
4062 open_view(view, request, flags);
4063 if (request == REQ_VIEW_TREE)
4064 view->lineno = tree_lineno;
4066 return REQ_NONE;
4067 }
4069 static void
4070 tree_select(struct view *view, struct line *line)
4071 {
4072 struct tree_entry *entry = line->data;
4074 if (line->type == LINE_TREE_FILE) {
4075 string_copy_rev(ref_blob, entry->id);
4076 string_format(opt_file, "%s%s", opt_path, tree_path(line));
4078 } else if (line->type != LINE_TREE_DIR) {
4079 return;
4080 }
4082 string_copy_rev(view->ref, entry->id);
4083 }
4085 static const char *tree_argv[SIZEOF_ARG] = {
4086 "git", "ls-tree", "%(commit)", "%(directory)", NULL
4087 };
4089 static struct view_ops tree_ops = {
4090 "file",
4091 tree_argv,
4092 NULL,
4093 tree_read,
4094 tree_draw,
4095 tree_request,
4096 pager_grep,
4097 tree_select,
4098 };
4100 static bool
4101 blob_read(struct view *view, char *line)
4102 {
4103 if (!line)
4104 return TRUE;
4105 return add_line_text(view, line, LINE_DEFAULT) != NULL;
4106 }
4108 static enum request
4109 blob_request(struct view *view, enum request request, struct line *line)
4110 {
4111 switch (request) {
4112 case REQ_EDIT:
4113 open_blob_editor();
4114 return REQ_NONE;
4115 default:
4116 return pager_request(view, request, line);
4117 }
4118 }
4120 static const char *blob_argv[SIZEOF_ARG] = {
4121 "git", "cat-file", "blob", "%(blob)", NULL
4122 };
4124 static struct view_ops blob_ops = {
4125 "line",
4126 blob_argv,
4127 NULL,
4128 blob_read,
4129 pager_draw,
4130 blob_request,
4131 pager_grep,
4132 pager_select,
4133 };
4135 /*
4136 * Blame backend
4137 *
4138 * Loading the blame view is a two phase job:
4139 *
4140 * 1. File content is read either using opt_file from the
4141 * filesystem or using git-cat-file.
4142 * 2. Then blame information is incrementally added by
4143 * reading output from git-blame.
4144 */
4146 static const char *blame_head_argv[] = {
4147 "git", "blame", "--incremental", "--", "%(file)", NULL
4148 };
4150 static const char *blame_ref_argv[] = {
4151 "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
4152 };
4154 static const char *blame_cat_file_argv[] = {
4155 "git", "cat-file", "blob", "%(ref):%(file)", NULL
4156 };
4158 struct blame_commit {
4159 char id[SIZEOF_REV]; /* SHA1 ID. */
4160 char title[128]; /* First line of the commit message. */
4161 char author[75]; /* Author of the commit. */
4162 struct tm time; /* Date from the author ident. */
4163 char filename[128]; /* Name of file. */
4164 bool has_previous; /* Was a "previous" line detected. */
4165 };
4167 struct blame {
4168 struct blame_commit *commit;
4169 char text[1];
4170 };
4172 static bool
4173 blame_open(struct view *view)
4174 {
4175 if (*opt_ref || !io_open(&view->io, opt_file)) {
4176 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
4177 return FALSE;
4178 }
4180 setup_update(view, opt_file);
4181 string_format(view->ref, "%s ...", opt_file);
4183 return TRUE;
4184 }
4186 static struct blame_commit *
4187 get_blame_commit(struct view *view, const char *id)
4188 {
4189 size_t i;
4191 for (i = 0; i < view->lines; i++) {
4192 struct blame *blame = view->line[i].data;
4194 if (!blame->commit)
4195 continue;
4197 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4198 return blame->commit;
4199 }
4201 {
4202 struct blame_commit *commit = calloc(1, sizeof(*commit));
4204 if (commit)
4205 string_ncopy(commit->id, id, SIZEOF_REV);
4206 return commit;
4207 }
4208 }
4210 static bool
4211 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4212 {
4213 const char *pos = *posref;
4215 *posref = NULL;
4216 pos = strchr(pos + 1, ' ');
4217 if (!pos || !isdigit(pos[1]))
4218 return FALSE;
4219 *number = atoi(pos + 1);
4220 if (*number < min || *number > max)
4221 return FALSE;
4223 *posref = pos;
4224 return TRUE;
4225 }
4227 static struct blame_commit *
4228 parse_blame_commit(struct view *view, const char *text, int *blamed)
4229 {
4230 struct blame_commit *commit;
4231 struct blame *blame;
4232 const char *pos = text + SIZEOF_REV - 1;
4233 size_t lineno;
4234 size_t group;
4236 if (strlen(text) <= SIZEOF_REV || *pos != ' ')
4237 return NULL;
4239 if (!parse_number(&pos, &lineno, 1, view->lines) ||
4240 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4241 return NULL;
4243 commit = get_blame_commit(view, text);
4244 if (!commit)
4245 return NULL;
4247 *blamed += group;
4248 while (group--) {
4249 struct line *line = &view->line[lineno + group - 1];
4251 blame = line->data;
4252 blame->commit = commit;
4253 line->dirty = 1;
4254 }
4256 return commit;
4257 }
4259 static bool
4260 blame_read_file(struct view *view, const char *line, bool *read_file)
4261 {
4262 if (!line) {
4263 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
4264 struct io io = {};
4266 if (view->lines == 0 && !view->parent)
4267 die("No blame exist for %s", view->vid);
4269 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
4270 report("Failed to load blame data");
4271 return TRUE;
4272 }
4274 done_io(view->pipe);
4275 view->io = io;
4276 *read_file = FALSE;
4277 return FALSE;
4279 } else {
4280 size_t linelen = strlen(line);
4281 struct blame *blame = malloc(sizeof(*blame) + linelen);
4283 blame->commit = NULL;
4284 strncpy(blame->text, line, linelen);
4285 blame->text[linelen] = 0;
4286 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4287 }
4288 }
4290 static bool
4291 match_blame_header(const char *name, char **line)
4292 {
4293 size_t namelen = strlen(name);
4294 bool matched = !strncmp(name, *line, namelen);
4296 if (matched)
4297 *line += namelen;
4299 return matched;
4300 }
4302 static bool
4303 blame_read(struct view *view, char *line)
4304 {
4305 static struct blame_commit *commit = NULL;
4306 static int blamed = 0;
4307 static time_t author_time;
4308 static bool read_file = TRUE;
4310 if (read_file)
4311 return blame_read_file(view, line, &read_file);
4313 if (!line) {
4314 /* Reset all! */
4315 commit = NULL;
4316 blamed = 0;
4317 read_file = TRUE;
4318 string_format(view->ref, "%s", view->vid);
4319 if (view_is_displayed(view)) {
4320 update_view_title(view);
4321 redraw_view_from(view, 0);
4322 }
4323 return TRUE;
4324 }
4326 if (!commit) {
4327 commit = parse_blame_commit(view, line, &blamed);
4328 string_format(view->ref, "%s %2d%%", view->vid,
4329 view->lines ? blamed * 100 / view->lines : 0);
4331 } else if (match_blame_header("author ", &line)) {
4332 string_ncopy(commit->author, line, strlen(line));
4334 } else if (match_blame_header("author-time ", &line)) {
4335 author_time = (time_t) atol(line);
4337 } else if (match_blame_header("author-tz ", &line)) {
4338 long tz;
4340 tz = ('0' - line[1]) * 60 * 60 * 10;
4341 tz += ('0' - line[2]) * 60 * 60;
4342 tz += ('0' - line[3]) * 60;
4343 tz += ('0' - line[4]) * 60;
4345 if (line[0] == '-')
4346 tz = -tz;
4348 author_time -= tz;
4349 gmtime_r(&author_time, &commit->time);
4351 } else if (match_blame_header("summary ", &line)) {
4352 string_ncopy(commit->title, line, strlen(line));
4354 } else if (match_blame_header("previous ", &line)) {
4355 commit->has_previous = TRUE;
4357 } else if (match_blame_header("filename ", &line)) {
4358 string_ncopy(commit->filename, line, strlen(line));
4359 commit = NULL;
4360 }
4362 return TRUE;
4363 }
4365 static bool
4366 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4367 {
4368 struct blame *blame = line->data;
4369 struct tm *time = NULL;
4370 const char *id = NULL, *author = NULL;
4372 if (blame->commit && *blame->commit->filename) {
4373 id = blame->commit->id;
4374 author = blame->commit->author;
4375 time = &blame->commit->time;
4376 }
4378 if (opt_date && draw_date(view, time))
4379 return TRUE;
4381 if (opt_author && draw_author(view, author))
4382 return TRUE;
4384 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4385 return TRUE;
4387 if (draw_lineno(view, lineno))
4388 return TRUE;
4390 draw_text(view, LINE_DEFAULT, blame->text, TRUE);
4391 return TRUE;
4392 }
4394 static bool
4395 check_blame_commit(struct blame *blame)
4396 {
4397 if (!blame->commit)
4398 report("Commit data not loaded yet");
4399 else if (!strcmp(blame->commit->id, NULL_ID))
4400 report("No commit exist for the selected line");
4401 else
4402 return TRUE;
4403 return FALSE;
4404 }
4406 static enum request
4407 blame_request(struct view *view, enum request request, struct line *line)
4408 {
4409 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4410 struct blame *blame = line->data;
4412 switch (request) {
4413 case REQ_VIEW_BLAME:
4414 if (check_blame_commit(blame)) {
4415 string_copy(opt_ref, blame->commit->id);
4416 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4417 }
4418 break;
4420 case REQ_PARENT:
4421 if (check_blame_commit(blame) &&
4422 select_commit_parent(blame->commit->id, opt_ref))
4423 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4424 break;
4426 case REQ_ENTER:
4427 if (!blame->commit) {
4428 report("No commit loaded yet");
4429 break;
4430 }
4432 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4433 !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4434 break;
4436 if (!strcmp(blame->commit->id, NULL_ID)) {
4437 struct view *diff = VIEW(REQ_VIEW_DIFF);
4438 const char *diff_index_argv[] = {
4439 "git", "diff-index", "--root", "--patch-with-stat",
4440 "-C", "-M", "HEAD", "--", view->vid, NULL
4441 };
4443 if (!blame->commit->has_previous) {
4444 diff_index_argv[1] = "diff";
4445 diff_index_argv[2] = "--no-color";
4446 diff_index_argv[6] = "--";
4447 diff_index_argv[7] = "/dev/null";
4448 }
4450 if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4451 report("Failed to allocate diff command");
4452 break;
4453 }
4454 flags |= OPEN_PREPARED;
4455 }
4457 open_view(view, REQ_VIEW_DIFF, flags);
4458 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4459 string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4460 break;
4462 default:
4463 return request;
4464 }
4466 return REQ_NONE;
4467 }
4469 static bool
4470 blame_grep(struct view *view, struct line *line)
4471 {
4472 struct blame *blame = line->data;
4473 struct blame_commit *commit = blame->commit;
4474 regmatch_t pmatch;
4476 #define MATCH(text, on) \
4477 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4479 if (commit) {
4480 char buf[DATE_COLS + 1];
4482 if (MATCH(commit->title, 1) ||
4483 MATCH(commit->author, opt_author) ||
4484 MATCH(commit->id, opt_date))
4485 return TRUE;
4487 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
4488 MATCH(buf, 1))
4489 return TRUE;
4490 }
4492 return MATCH(blame->text, 1);
4494 #undef MATCH
4495 }
4497 static void
4498 blame_select(struct view *view, struct line *line)
4499 {
4500 struct blame *blame = line->data;
4501 struct blame_commit *commit = blame->commit;
4503 if (!commit)
4504 return;
4506 if (!strcmp(commit->id, NULL_ID))
4507 string_ncopy(ref_commit, "HEAD", 4);
4508 else
4509 string_copy_rev(ref_commit, commit->id);
4510 }
4512 static struct view_ops blame_ops = {
4513 "line",
4514 NULL,
4515 blame_open,
4516 blame_read,
4517 blame_draw,
4518 blame_request,
4519 blame_grep,
4520 blame_select,
4521 };
4523 /*
4524 * Status backend
4525 */
4527 struct status {
4528 char status;
4529 struct {
4530 mode_t mode;
4531 char rev[SIZEOF_REV];
4532 char name[SIZEOF_STR];
4533 } old;
4534 struct {
4535 mode_t mode;
4536 char rev[SIZEOF_REV];
4537 char name[SIZEOF_STR];
4538 } new;
4539 };
4541 static char status_onbranch[SIZEOF_STR];
4542 static struct status stage_status;
4543 static enum line_type stage_line_type;
4544 static size_t stage_chunks;
4545 static int *stage_chunk;
4547 /* This should work even for the "On branch" line. */
4548 static inline bool
4549 status_has_none(struct view *view, struct line *line)
4550 {
4551 return line < view->line + view->lines && !line[1].data;
4552 }
4554 /* Get fields from the diff line:
4555 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4556 */
4557 static inline bool
4558 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4559 {
4560 const char *old_mode = buf + 1;
4561 const char *new_mode = buf + 8;
4562 const char *old_rev = buf + 15;
4563 const char *new_rev = buf + 56;
4564 const char *status = buf + 97;
4566 if (bufsize < 98 ||
4567 old_mode[-1] != ':' ||
4568 new_mode[-1] != ' ' ||
4569 old_rev[-1] != ' ' ||
4570 new_rev[-1] != ' ' ||
4571 status[-1] != ' ')
4572 return FALSE;
4574 file->status = *status;
4576 string_copy_rev(file->old.rev, old_rev);
4577 string_copy_rev(file->new.rev, new_rev);
4579 file->old.mode = strtoul(old_mode, NULL, 8);
4580 file->new.mode = strtoul(new_mode, NULL, 8);
4582 file->old.name[0] = file->new.name[0] = 0;
4584 return TRUE;
4585 }
4587 static bool
4588 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4589 {
4590 struct status *file = NULL;
4591 struct status *unmerged = NULL;
4592 char *buf;
4593 struct io io = {};
4595 if (!run_io(&io, argv, NULL, IO_RD))
4596 return FALSE;
4598 add_line_data(view, NULL, type);
4600 while ((buf = io_get(&io, 0, TRUE))) {
4601 if (!file) {
4602 file = calloc(1, sizeof(*file));
4603 if (!file || !add_line_data(view, file, type))
4604 goto error_out;
4605 }
4607 /* Parse diff info part. */
4608 if (status) {
4609 file->status = status;
4610 if (status == 'A')
4611 string_copy(file->old.rev, NULL_ID);
4613 } else if (!file->status) {
4614 if (!status_get_diff(file, buf, strlen(buf)))
4615 goto error_out;
4617 buf = io_get(&io, 0, TRUE);
4618 if (!buf)
4619 break;
4621 /* Collapse all 'M'odified entries that follow a
4622 * associated 'U'nmerged entry. */
4623 if (file->status == 'U') {
4624 unmerged = file;
4626 } else if (unmerged) {
4627 int collapse = !strcmp(buf, unmerged->new.name);
4629 unmerged = NULL;
4630 if (collapse) {
4631 free(file);
4632 file = NULL;
4633 view->lines--;
4634 continue;
4635 }
4636 }
4637 }
4639 /* Grab the old name for rename/copy. */
4640 if (!*file->old.name &&
4641 (file->status == 'R' || file->status == 'C')) {
4642 string_ncopy(file->old.name, buf, strlen(buf));
4644 buf = io_get(&io, 0, TRUE);
4645 if (!buf)
4646 break;
4647 }
4649 /* git-ls-files just delivers a NUL separated list of
4650 * file names similar to the second half of the
4651 * git-diff-* output. */
4652 string_ncopy(file->new.name, buf, strlen(buf));
4653 if (!*file->old.name)
4654 string_copy(file->old.name, file->new.name);
4655 file = NULL;
4656 }
4658 if (io_error(&io)) {
4659 error_out:
4660 done_io(&io);
4661 return FALSE;
4662 }
4664 if (!view->line[view->lines - 1].data)
4665 add_line_data(view, NULL, LINE_STAT_NONE);
4667 done_io(&io);
4668 return TRUE;
4669 }
4671 /* Don't show unmerged entries in the staged section. */
4672 static const char *status_diff_index_argv[] = {
4673 "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4674 "--cached", "-M", "HEAD", NULL
4675 };
4677 static const char *status_diff_files_argv[] = {
4678 "git", "diff-files", "-z", NULL
4679 };
4681 static const char *status_list_other_argv[] = {
4682 "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
4683 };
4685 static const char *status_list_no_head_argv[] = {
4686 "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4687 };
4689 static const char *update_index_argv[] = {
4690 "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4691 };
4693 /* Restore the previous line number to stay in the context or select a
4694 * line with something that can be updated. */
4695 static void
4696 status_restore(struct view *view)
4697 {
4698 if (view->p_lineno >= view->lines)
4699 view->p_lineno = view->lines - 1;
4700 while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
4701 view->p_lineno++;
4702 while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
4703 view->p_lineno--;
4705 /* If the above fails, always skip the "On branch" line. */
4706 if (view->p_lineno < view->lines)
4707 view->lineno = view->p_lineno;
4708 else
4709 view->lineno = 1;
4711 if (view->lineno < view->offset)
4712 view->offset = view->lineno;
4713 else if (view->offset + view->height <= view->lineno)
4714 view->offset = view->lineno - view->height + 1;
4716 view->p_restore = FALSE;
4717 }
4719 /* First parse staged info using git-diff-index(1), then parse unstaged
4720 * info using git-diff-files(1), and finally untracked files using
4721 * git-ls-files(1). */
4722 static bool
4723 status_open(struct view *view)
4724 {
4725 reset_view(view);
4727 add_line_data(view, NULL, LINE_STAT_HEAD);
4728 if (is_initial_commit())
4729 string_copy(status_onbranch, "Initial commit");
4730 else if (!*opt_head)
4731 string_copy(status_onbranch, "Not currently on any branch");
4732 else if (!string_format(status_onbranch, "On branch %s", opt_head))
4733 return FALSE;
4735 run_io_bg(update_index_argv);
4737 if (is_initial_commit()) {
4738 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4739 return FALSE;
4740 } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4741 return FALSE;
4742 }
4744 if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4745 !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4746 return FALSE;
4748 /* Restore the exact position or use the specialized restore
4749 * mode? */
4750 if (!view->p_restore)
4751 status_restore(view);
4752 return TRUE;
4753 }
4755 static bool
4756 status_draw(struct view *view, struct line *line, unsigned int lineno)
4757 {
4758 struct status *status = line->data;
4759 enum line_type type;
4760 const char *text;
4762 if (!status) {
4763 switch (line->type) {
4764 case LINE_STAT_STAGED:
4765 type = LINE_STAT_SECTION;
4766 text = "Changes to be committed:";
4767 break;
4769 case LINE_STAT_UNSTAGED:
4770 type = LINE_STAT_SECTION;
4771 text = "Changed but not updated:";
4772 break;
4774 case LINE_STAT_UNTRACKED:
4775 type = LINE_STAT_SECTION;
4776 text = "Untracked files:";
4777 break;
4779 case LINE_STAT_NONE:
4780 type = LINE_DEFAULT;
4781 text = " (no files)";
4782 break;
4784 case LINE_STAT_HEAD:
4785 type = LINE_STAT_HEAD;
4786 text = status_onbranch;
4787 break;
4789 default:
4790 return FALSE;
4791 }
4792 } else {
4793 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4795 buf[0] = status->status;
4796 if (draw_text(view, line->type, buf, TRUE))
4797 return TRUE;
4798 type = LINE_DEFAULT;
4799 text = status->new.name;
4800 }
4802 draw_text(view, type, text, TRUE);
4803 return TRUE;
4804 }
4806 static enum request
4807 status_enter(struct view *view, struct line *line)
4808 {
4809 struct status *status = line->data;
4810 const char *oldpath = status ? status->old.name : NULL;
4811 /* Diffs for unmerged entries are empty when passing the new
4812 * path, so leave it empty. */
4813 const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
4814 const char *info;
4815 enum open_flags split;
4816 struct view *stage = VIEW(REQ_VIEW_STAGE);
4818 if (line->type == LINE_STAT_NONE ||
4819 (!status && line[1].type == LINE_STAT_NONE)) {
4820 report("No file to diff");
4821 return REQ_NONE;
4822 }
4824 switch (line->type) {
4825 case LINE_STAT_STAGED:
4826 if (is_initial_commit()) {
4827 const char *no_head_diff_argv[] = {
4828 "git", "diff", "--no-color", "--patch-with-stat",
4829 "--", "/dev/null", newpath, NULL
4830 };
4832 if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
4833 return REQ_QUIT;
4834 } else {
4835 const char *index_show_argv[] = {
4836 "git", "diff-index", "--root", "--patch-with-stat",
4837 "-C", "-M", "--cached", "HEAD", "--",
4838 oldpath, newpath, NULL
4839 };
4841 if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
4842 return REQ_QUIT;
4843 }
4845 if (status)
4846 info = "Staged changes to %s";
4847 else
4848 info = "Staged changes";
4849 break;
4851 case LINE_STAT_UNSTAGED:
4852 {
4853 const char *files_show_argv[] = {
4854 "git", "diff-files", "--root", "--patch-with-stat",
4855 "-C", "-M", "--", oldpath, newpath, NULL
4856 };
4858 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
4859 return REQ_QUIT;
4860 if (status)
4861 info = "Unstaged changes to %s";
4862 else
4863 info = "Unstaged changes";
4864 break;
4865 }
4866 case LINE_STAT_UNTRACKED:
4867 if (!newpath) {
4868 report("No file to show");
4869 return REQ_NONE;
4870 }
4872 if (!suffixcmp(status->new.name, -1, "/")) {
4873 report("Cannot display a directory");
4874 return REQ_NONE;
4875 }
4877 if (!prepare_update_file(stage, newpath))
4878 return REQ_QUIT;
4879 info = "Untracked file %s";
4880 break;
4882 case LINE_STAT_HEAD:
4883 return REQ_NONE;
4885 default:
4886 die("line type %d not handled in switch", line->type);
4887 }
4889 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4890 open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
4891 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4892 if (status) {
4893 stage_status = *status;
4894 } else {
4895 memset(&stage_status, 0, sizeof(stage_status));
4896 }
4898 stage_line_type = line->type;
4899 stage_chunks = 0;
4900 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4901 }
4903 return REQ_NONE;
4904 }
4906 static bool
4907 status_exists(struct status *status, enum line_type type)
4908 {
4909 struct view *view = VIEW(REQ_VIEW_STATUS);
4910 unsigned long lineno;
4912 for (lineno = 0; lineno < view->lines; lineno++) {
4913 struct line *line = &view->line[lineno];
4914 struct status *pos = line->data;
4916 if (line->type != type)
4917 continue;
4918 if (!pos && (!status || !status->status) && line[1].data) {
4919 select_view_line(view, lineno);
4920 return TRUE;
4921 }
4922 if (pos && !strcmp(status->new.name, pos->new.name)) {
4923 select_view_line(view, lineno);
4924 return TRUE;
4925 }
4926 }
4928 return FALSE;
4929 }
4932 static bool
4933 status_update_prepare(struct io *io, enum line_type type)
4934 {
4935 const char *staged_argv[] = {
4936 "git", "update-index", "-z", "--index-info", NULL
4937 };
4938 const char *others_argv[] = {
4939 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
4940 };
4942 switch (type) {
4943 case LINE_STAT_STAGED:
4944 return run_io(io, staged_argv, opt_cdup, IO_WR);
4946 case LINE_STAT_UNSTAGED:
4947 return run_io(io, others_argv, opt_cdup, IO_WR);
4949 case LINE_STAT_UNTRACKED:
4950 return run_io(io, others_argv, NULL, IO_WR);
4952 default:
4953 die("line type %d not handled in switch", type);
4954 return FALSE;
4955 }
4956 }
4958 static bool
4959 status_update_write(struct io *io, struct status *status, enum line_type type)
4960 {
4961 char buf[SIZEOF_STR];
4962 size_t bufsize = 0;
4964 switch (type) {
4965 case LINE_STAT_STAGED:
4966 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
4967 status->old.mode,
4968 status->old.rev,
4969 status->old.name, 0))
4970 return FALSE;
4971 break;
4973 case LINE_STAT_UNSTAGED:
4974 case LINE_STAT_UNTRACKED:
4975 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
4976 return FALSE;
4977 break;
4979 default:
4980 die("line type %d not handled in switch", type);
4981 }
4983 return io_write(io, buf, bufsize);
4984 }
4986 static bool
4987 status_update_file(struct status *status, enum line_type type)
4988 {
4989 struct io io = {};
4990 bool result;
4992 if (!status_update_prepare(&io, type))
4993 return FALSE;
4995 result = status_update_write(&io, status, type);
4996 done_io(&io);
4997 return result;
4998 }
5000 static bool
5001 status_update_files(struct view *view, struct line *line)
5002 {
5003 struct io io = {};
5004 bool result = TRUE;
5005 struct line *pos = view->line + view->lines;
5006 int files = 0;
5007 int file, done;
5009 if (!status_update_prepare(&io, line->type))
5010 return FALSE;
5012 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
5013 files++;
5015 for (file = 0, done = 0; result && file < files; line++, file++) {
5016 int almost_done = file * 100 / files;
5018 if (almost_done > done) {
5019 done = almost_done;
5020 string_format(view->ref, "updating file %u of %u (%d%% done)",
5021 file, files, done);
5022 update_view_title(view);
5023 }
5024 result = status_update_write(&io, line->data, line->type);
5025 }
5027 done_io(&io);
5028 return result;
5029 }
5031 static bool
5032 status_update(struct view *view)
5033 {
5034 struct line *line = &view->line[view->lineno];
5036 assert(view->lines);
5038 if (!line->data) {
5039 /* This should work even for the "On branch" line. */
5040 if (line < view->line + view->lines && !line[1].data) {
5041 report("Nothing to update");
5042 return FALSE;
5043 }
5045 if (!status_update_files(view, line + 1)) {
5046 report("Failed to update file status");
5047 return FALSE;
5048 }
5050 } else if (!status_update_file(line->data, line->type)) {
5051 report("Failed to update file status");
5052 return FALSE;
5053 }
5055 return TRUE;
5056 }
5058 static bool
5059 status_revert(struct status *status, enum line_type type, bool has_none)
5060 {
5061 if (!status || type != LINE_STAT_UNSTAGED) {
5062 if (type == LINE_STAT_STAGED) {
5063 report("Cannot revert changes to staged files");
5064 } else if (type == LINE_STAT_UNTRACKED) {
5065 report("Cannot revert changes to untracked files");
5066 } else if (has_none) {
5067 report("Nothing to revert");
5068 } else {
5069 report("Cannot revert changes to multiple files");
5070 }
5071 return FALSE;
5073 } else {
5074 const char *checkout_argv[] = {
5075 "git", "checkout", "--", status->old.name, NULL
5076 };
5078 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
5079 return FALSE;
5080 return run_io_fg(checkout_argv, opt_cdup);
5081 }
5082 }
5084 static enum request
5085 status_request(struct view *view, enum request request, struct line *line)
5086 {
5087 struct status *status = line->data;
5089 switch (request) {
5090 case REQ_STATUS_UPDATE:
5091 if (!status_update(view))
5092 return REQ_NONE;
5093 break;
5095 case REQ_STATUS_REVERT:
5096 if (!status_revert(status, line->type, status_has_none(view, line)))
5097 return REQ_NONE;
5098 break;
5100 case REQ_STATUS_MERGE:
5101 if (!status || status->status != 'U') {
5102 report("Merging only possible for files with unmerged status ('U').");
5103 return REQ_NONE;
5104 }
5105 open_mergetool(status->new.name);
5106 break;
5108 case REQ_EDIT:
5109 if (!status)
5110 return request;
5111 if (status->status == 'D') {
5112 report("File has been deleted.");
5113 return REQ_NONE;
5114 }
5116 open_editor(status->status != '?', status->new.name);
5117 break;
5119 case REQ_VIEW_BLAME:
5120 if (status) {
5121 string_copy(opt_file, status->new.name);
5122 opt_ref[0] = 0;
5123 }
5124 return request;
5126 case REQ_ENTER:
5127 /* After returning the status view has been split to
5128 * show the stage view. No further reloading is
5129 * necessary. */
5130 status_enter(view, line);
5131 return REQ_NONE;
5133 case REQ_REFRESH:
5134 /* Simply reload the view. */
5135 break;
5137 default:
5138 return request;
5139 }
5141 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5143 return REQ_NONE;
5144 }
5146 static void
5147 status_select(struct view *view, struct line *line)
5148 {
5149 struct status *status = line->data;
5150 char file[SIZEOF_STR] = "all files";
5151 const char *text;
5152 const char *key;
5154 if (status && !string_format(file, "'%s'", status->new.name))
5155 return;
5157 if (!status && line[1].type == LINE_STAT_NONE)
5158 line++;
5160 switch (line->type) {
5161 case LINE_STAT_STAGED:
5162 text = "Press %s to unstage %s for commit";
5163 break;
5165 case LINE_STAT_UNSTAGED:
5166 text = "Press %s to stage %s for commit";
5167 break;
5169 case LINE_STAT_UNTRACKED:
5170 text = "Press %s to stage %s for addition";
5171 break;
5173 case LINE_STAT_HEAD:
5174 case LINE_STAT_NONE:
5175 text = "Nothing to update";
5176 break;
5178 default:
5179 die("line type %d not handled in switch", line->type);
5180 }
5182 if (status && status->status == 'U') {
5183 text = "Press %s to resolve conflict in %s";
5184 key = get_key(REQ_STATUS_MERGE);
5186 } else {
5187 key = get_key(REQ_STATUS_UPDATE);
5188 }
5190 string_format(view->ref, text, key, file);
5191 }
5193 static bool
5194 status_grep(struct view *view, struct line *line)
5195 {
5196 struct status *status = line->data;
5197 enum { S_STATUS, S_NAME, S_END } state;
5198 char buf[2] = "?";
5199 regmatch_t pmatch;
5201 if (!status)
5202 return FALSE;
5204 for (state = S_STATUS; state < S_END; state++) {
5205 const char *text;
5207 switch (state) {
5208 case S_NAME: text = status->new.name; break;
5209 case S_STATUS:
5210 buf[0] = status->status;
5211 text = buf;
5212 break;
5214 default:
5215 return FALSE;
5216 }
5218 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5219 return TRUE;
5220 }
5222 return FALSE;
5223 }
5225 static struct view_ops status_ops = {
5226 "file",
5227 NULL,
5228 status_open,
5229 NULL,
5230 status_draw,
5231 status_request,
5232 status_grep,
5233 status_select,
5234 };
5237 static bool
5238 stage_diff_write(struct io *io, struct line *line, struct line *end)
5239 {
5240 while (line < end) {
5241 if (!io_write(io, line->data, strlen(line->data)) ||
5242 !io_write(io, "\n", 1))
5243 return FALSE;
5244 line++;
5245 if (line->type == LINE_DIFF_CHUNK ||
5246 line->type == LINE_DIFF_HEADER)
5247 break;
5248 }
5250 return TRUE;
5251 }
5253 static struct line *
5254 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5255 {
5256 for (; view->line < line; line--)
5257 if (line->type == type)
5258 return line;
5260 return NULL;
5261 }
5263 static bool
5264 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5265 {
5266 const char *apply_argv[SIZEOF_ARG] = {
5267 "git", "apply", "--whitespace=nowarn", NULL
5268 };
5269 struct line *diff_hdr;
5270 struct io io = {};
5271 int argc = 3;
5273 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5274 if (!diff_hdr)
5275 return FALSE;
5277 if (!revert)
5278 apply_argv[argc++] = "--cached";
5279 if (revert || stage_line_type == LINE_STAT_STAGED)
5280 apply_argv[argc++] = "-R";
5281 apply_argv[argc++] = "-";
5282 apply_argv[argc++] = NULL;
5283 if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
5284 return FALSE;
5286 if (!stage_diff_write(&io, diff_hdr, chunk) ||
5287 !stage_diff_write(&io, chunk, view->line + view->lines))
5288 chunk = NULL;
5290 done_io(&io);
5291 run_io_bg(update_index_argv);
5293 return chunk ? TRUE : FALSE;
5294 }
5296 static bool
5297 stage_update(struct view *view, struct line *line)
5298 {
5299 struct line *chunk = NULL;
5301 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5302 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5304 if (chunk) {
5305 if (!stage_apply_chunk(view, chunk, FALSE)) {
5306 report("Failed to apply chunk");
5307 return FALSE;
5308 }
5310 } else if (!stage_status.status) {
5311 view = VIEW(REQ_VIEW_STATUS);
5313 for (line = view->line; line < view->line + view->lines; line++)
5314 if (line->type == stage_line_type)
5315 break;
5317 if (!status_update_files(view, line + 1)) {
5318 report("Failed to update files");
5319 return FALSE;
5320 }
5322 } else if (!status_update_file(&stage_status, stage_line_type)) {
5323 report("Failed to update file");
5324 return FALSE;
5325 }
5327 return TRUE;
5328 }
5330 static bool
5331 stage_revert(struct view *view, struct line *line)
5332 {
5333 struct line *chunk = NULL;
5335 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5336 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5338 if (chunk) {
5339 if (!prompt_yesno("Are you sure you want to revert changes?"))
5340 return FALSE;
5342 if (!stage_apply_chunk(view, chunk, TRUE)) {
5343 report("Failed to revert chunk");
5344 return FALSE;
5345 }
5346 return TRUE;
5348 } else {
5349 return status_revert(stage_status.status ? &stage_status : NULL,
5350 stage_line_type, FALSE);
5351 }
5352 }
5355 static void
5356 stage_next(struct view *view, struct line *line)
5357 {
5358 int i;
5360 if (!stage_chunks) {
5361 static size_t alloc = 0;
5362 int *tmp;
5364 for (line = view->line; line < view->line + view->lines; line++) {
5365 if (line->type != LINE_DIFF_CHUNK)
5366 continue;
5368 tmp = realloc_items(stage_chunk, &alloc,
5369 stage_chunks, sizeof(*tmp));
5370 if (!tmp) {
5371 report("Allocation failure");
5372 return;
5373 }
5375 stage_chunk = tmp;
5376 stage_chunk[stage_chunks++] = line - view->line;
5377 }
5378 }
5380 for (i = 0; i < stage_chunks; i++) {
5381 if (stage_chunk[i] > view->lineno) {
5382 do_scroll_view(view, stage_chunk[i] - view->lineno);
5383 report("Chunk %d of %d", i + 1, stage_chunks);
5384 return;
5385 }
5386 }
5388 report("No next chunk found");
5389 }
5391 static enum request
5392 stage_request(struct view *view, enum request request, struct line *line)
5393 {
5394 switch (request) {
5395 case REQ_STATUS_UPDATE:
5396 if (!stage_update(view, line))
5397 return REQ_NONE;
5398 break;
5400 case REQ_STATUS_REVERT:
5401 if (!stage_revert(view, line))
5402 return REQ_NONE;
5403 break;
5405 case REQ_STAGE_NEXT:
5406 if (stage_line_type == LINE_STAT_UNTRACKED) {
5407 report("File is untracked; press %s to add",
5408 get_key(REQ_STATUS_UPDATE));
5409 return REQ_NONE;
5410 }
5411 stage_next(view, line);
5412 return REQ_NONE;
5414 case REQ_EDIT:
5415 if (!stage_status.new.name[0])
5416 return request;
5417 if (stage_status.status == 'D') {
5418 report("File has been deleted.");
5419 return REQ_NONE;
5420 }
5422 open_editor(stage_status.status != '?', stage_status.new.name);
5423 break;
5425 case REQ_REFRESH:
5426 /* Reload everything ... */
5427 break;
5429 case REQ_VIEW_BLAME:
5430 if (stage_status.new.name[0]) {
5431 string_copy(opt_file, stage_status.new.name);
5432 opt_ref[0] = 0;
5433 }
5434 return request;
5436 case REQ_ENTER:
5437 return pager_request(view, request, line);
5439 default:
5440 return request;
5441 }
5443 VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5444 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD | OPEN_NOMAXIMIZE);
5446 /* Check whether the staged entry still exists, and close the
5447 * stage view if it doesn't. */
5448 if (!status_exists(&stage_status, stage_line_type)) {
5449 status_restore(VIEW(REQ_VIEW_STATUS));
5450 return REQ_VIEW_CLOSE;
5451 }
5453 if (stage_line_type == LINE_STAT_UNTRACKED) {
5454 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5455 report("Cannot display a directory");
5456 return REQ_NONE;
5457 }
5459 if (!prepare_update_file(view, stage_status.new.name)) {
5460 report("Failed to open file: %s", strerror(errno));
5461 return REQ_NONE;
5462 }
5463 }
5464 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5466 return REQ_NONE;
5467 }
5469 static struct view_ops stage_ops = {
5470 "line",
5471 NULL,
5472 NULL,
5473 pager_read,
5474 pager_draw,
5475 stage_request,
5476 pager_grep,
5477 pager_select,
5478 };
5481 /*
5482 * Revision graph
5483 */
5485 struct commit {
5486 char id[SIZEOF_REV]; /* SHA1 ID. */
5487 char title[128]; /* First line of the commit message. */
5488 char author[75]; /* Author of the commit. */
5489 struct tm time; /* Date from the author ident. */
5490 struct ref **refs; /* Repository references. */
5491 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
5492 size_t graph_size; /* The width of the graph array. */
5493 bool has_parents; /* Rewritten --parents seen. */
5494 };
5496 /* Size of rev graph with no "padding" columns */
5497 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5499 struct rev_graph {
5500 struct rev_graph *prev, *next, *parents;
5501 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5502 size_t size;
5503 struct commit *commit;
5504 size_t pos;
5505 unsigned int boundary:1;
5506 };
5508 /* Parents of the commit being visualized. */
5509 static struct rev_graph graph_parents[4];
5511 /* The current stack of revisions on the graph. */
5512 static struct rev_graph graph_stacks[4] = {
5513 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5514 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5515 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5516 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5517 };
5519 static inline bool
5520 graph_parent_is_merge(struct rev_graph *graph)
5521 {
5522 return graph->parents->size > 1;
5523 }
5525 static inline void
5526 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5527 {
5528 struct commit *commit = graph->commit;
5530 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5531 commit->graph[commit->graph_size++] = symbol;
5532 }
5534 static void
5535 clear_rev_graph(struct rev_graph *graph)
5536 {
5537 graph->boundary = 0;
5538 graph->size = graph->pos = 0;
5539 graph->commit = NULL;
5540 memset(graph->parents, 0, sizeof(*graph->parents));
5541 }
5543 static void
5544 done_rev_graph(struct rev_graph *graph)
5545 {
5546 if (graph_parent_is_merge(graph) &&
5547 graph->pos < graph->size - 1 &&
5548 graph->next->size == graph->size + graph->parents->size - 1) {
5549 size_t i = graph->pos + graph->parents->size - 1;
5551 graph->commit->graph_size = i * 2;
5552 while (i < graph->next->size - 1) {
5553 append_to_rev_graph(graph, ' ');
5554 append_to_rev_graph(graph, '\\');
5555 i++;
5556 }
5557 }
5559 clear_rev_graph(graph);
5560 }
5562 static void
5563 push_rev_graph(struct rev_graph *graph, const char *parent)
5564 {
5565 int i;
5567 /* "Collapse" duplicate parents lines.
5568 *
5569 * FIXME: This needs to also update update the drawn graph but
5570 * for now it just serves as a method for pruning graph lines. */
5571 for (i = 0; i < graph->size; i++)
5572 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5573 return;
5575 if (graph->size < SIZEOF_REVITEMS) {
5576 string_copy_rev(graph->rev[graph->size++], parent);
5577 }
5578 }
5580 static chtype
5581 get_rev_graph_symbol(struct rev_graph *graph)
5582 {
5583 chtype symbol;
5585 if (graph->boundary)
5586 symbol = REVGRAPH_BOUND;
5587 else if (graph->parents->size == 0)
5588 symbol = REVGRAPH_INIT;
5589 else if (graph_parent_is_merge(graph))
5590 symbol = REVGRAPH_MERGE;
5591 else if (graph->pos >= graph->size)
5592 symbol = REVGRAPH_BRANCH;
5593 else
5594 symbol = REVGRAPH_COMMIT;
5596 return symbol;
5597 }
5599 static void
5600 draw_rev_graph(struct rev_graph *graph)
5601 {
5602 struct rev_filler {
5603 chtype separator, line;
5604 };
5605 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
5606 static struct rev_filler fillers[] = {
5607 { ' ', '|' },
5608 { '`', '.' },
5609 { '\'', ' ' },
5610 { '/', ' ' },
5611 };
5612 chtype symbol = get_rev_graph_symbol(graph);
5613 struct rev_filler *filler;
5614 size_t i;
5616 if (opt_line_graphics)
5617 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
5619 filler = &fillers[DEFAULT];
5621 for (i = 0; i < graph->pos; i++) {
5622 append_to_rev_graph(graph, filler->line);
5623 if (graph_parent_is_merge(graph->prev) &&
5624 graph->prev->pos == i)
5625 filler = &fillers[RSHARP];
5627 append_to_rev_graph(graph, filler->separator);
5628 }
5630 /* Place the symbol for this revision. */
5631 append_to_rev_graph(graph, symbol);
5633 if (graph->prev->size > graph->size)
5634 filler = &fillers[RDIAG];
5635 else
5636 filler = &fillers[DEFAULT];
5638 i++;
5640 for (; i < graph->size; i++) {
5641 append_to_rev_graph(graph, filler->separator);
5642 append_to_rev_graph(graph, filler->line);
5643 if (graph_parent_is_merge(graph->prev) &&
5644 i < graph->prev->pos + graph->parents->size)
5645 filler = &fillers[RSHARP];
5646 if (graph->prev->size > graph->size)
5647 filler = &fillers[LDIAG];
5648 }
5650 if (graph->prev->size > graph->size) {
5651 append_to_rev_graph(graph, filler->separator);
5652 if (filler->line != ' ')
5653 append_to_rev_graph(graph, filler->line);
5654 }
5655 }
5657 /* Prepare the next rev graph */
5658 static void
5659 prepare_rev_graph(struct rev_graph *graph)
5660 {
5661 size_t i;
5663 /* First, traverse all lines of revisions up to the active one. */
5664 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5665 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5666 break;
5668 push_rev_graph(graph->next, graph->rev[graph->pos]);
5669 }
5671 /* Interleave the new revision parent(s). */
5672 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5673 push_rev_graph(graph->next, graph->parents->rev[i]);
5675 /* Lastly, put any remaining revisions. */
5676 for (i = graph->pos + 1; i < graph->size; i++)
5677 push_rev_graph(graph->next, graph->rev[i]);
5678 }
5680 static void
5681 update_rev_graph(struct view *view, struct rev_graph *graph)
5682 {
5683 /* If this is the finalizing update ... */
5684 if (graph->commit)
5685 prepare_rev_graph(graph);
5687 /* Graph visualization needs a one rev look-ahead,
5688 * so the first update doesn't visualize anything. */
5689 if (!graph->prev->commit)
5690 return;
5692 if (view->lines > 2)
5693 view->line[view->lines - 3].dirty = 1;
5694 if (view->lines > 1)
5695 view->line[view->lines - 2].dirty = 1;
5696 draw_rev_graph(graph->prev);
5697 done_rev_graph(graph->prev->prev);
5698 }
5701 /*
5702 * Main view backend
5703 */
5705 static const char *main_argv[SIZEOF_ARG] = {
5706 "git", "log", "--no-color", "--pretty=raw", "--parents",
5707 "--topo-order", "%(head)", NULL
5708 };
5710 static bool
5711 main_draw(struct view *view, struct line *line, unsigned int lineno)
5712 {
5713 struct commit *commit = line->data;
5715 if (!*commit->author)
5716 return FALSE;
5718 if (opt_date && draw_date(view, &commit->time))
5719 return TRUE;
5721 if (opt_author && draw_author(view, commit->author))
5722 return TRUE;
5724 if (opt_rev_graph && commit->graph_size &&
5725 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5726 return TRUE;
5728 if (opt_show_refs && commit->refs) {
5729 size_t i = 0;
5731 do {
5732 enum line_type type;
5734 if (commit->refs[i]->head)
5735 type = LINE_MAIN_HEAD;
5736 else if (commit->refs[i]->ltag)
5737 type = LINE_MAIN_LOCAL_TAG;
5738 else if (commit->refs[i]->tag)
5739 type = LINE_MAIN_TAG;
5740 else if (commit->refs[i]->tracked)
5741 type = LINE_MAIN_TRACKED;
5742 else if (commit->refs[i]->remote)
5743 type = LINE_MAIN_REMOTE;
5744 else
5745 type = LINE_MAIN_REF;
5747 if (draw_text(view, type, "[", TRUE) ||
5748 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5749 draw_text(view, type, "]", TRUE))
5750 return TRUE;
5752 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5753 return TRUE;
5754 } while (commit->refs[i++]->next);
5755 }
5757 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5758 return TRUE;
5759 }
5761 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5762 static bool
5763 main_read(struct view *view, char *line)
5764 {
5765 static struct rev_graph *graph = graph_stacks;
5766 enum line_type type;
5767 struct commit *commit;
5769 if (!line) {
5770 int i;
5772 if (!view->lines && !view->parent)
5773 die("No revisions match the given arguments.");
5774 if (view->lines > 0) {
5775 commit = view->line[view->lines - 1].data;
5776 view->line[view->lines - 1].dirty = 1;
5777 if (!*commit->author) {
5778 view->lines--;
5779 free(commit);
5780 graph->commit = NULL;
5781 }
5782 }
5783 update_rev_graph(view, graph);
5785 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5786 clear_rev_graph(&graph_stacks[i]);
5787 return TRUE;
5788 }
5790 type = get_line_type(line);
5791 if (type == LINE_COMMIT) {
5792 commit = calloc(1, sizeof(struct commit));
5793 if (!commit)
5794 return FALSE;
5796 line += STRING_SIZE("commit ");
5797 if (*line == '-') {
5798 graph->boundary = 1;
5799 line++;
5800 }
5802 string_copy_rev(commit->id, line);
5803 commit->refs = get_refs(commit->id);
5804 graph->commit = commit;
5805 add_line_data(view, commit, LINE_MAIN_COMMIT);
5807 while ((line = strchr(line, ' '))) {
5808 line++;
5809 push_rev_graph(graph->parents, line);
5810 commit->has_parents = TRUE;
5811 }
5812 return TRUE;
5813 }
5815 if (!view->lines)
5816 return TRUE;
5817 commit = view->line[view->lines - 1].data;
5819 switch (type) {
5820 case LINE_PARENT:
5821 if (commit->has_parents)
5822 break;
5823 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5824 break;
5826 case LINE_AUTHOR:
5827 parse_author_line(line + STRING_SIZE("author "),
5828 commit->author, sizeof(commit->author),
5829 &commit->time);
5830 update_rev_graph(view, graph);
5831 graph = graph->next;
5832 break;
5834 default:
5835 /* Fill in the commit title if it has not already been set. */
5836 if (commit->title[0])
5837 break;
5839 /* Require titles to start with a non-space character at the
5840 * offset used by git log. */
5841 if (strncmp(line, " ", 4))
5842 break;
5843 line += 4;
5844 /* Well, if the title starts with a whitespace character,
5845 * try to be forgiving. Otherwise we end up with no title. */
5846 while (isspace(*line))
5847 line++;
5848 if (*line == '\0')
5849 break;
5850 /* FIXME: More graceful handling of titles; append "..." to
5851 * shortened titles, etc. */
5853 string_ncopy(commit->title, line, strlen(line));
5854 view->line[view->lines - 1].dirty = 1;
5855 }
5857 return TRUE;
5858 }
5860 static enum request
5861 main_request(struct view *view, enum request request, struct line *line)
5862 {
5863 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5865 switch (request) {
5866 case REQ_ENTER:
5867 open_view(view, REQ_VIEW_DIFF, flags);
5868 break;
5869 case REQ_REFRESH:
5870 load_refs();
5871 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5872 break;
5873 default:
5874 return request;
5875 }
5877 return REQ_NONE;
5878 }
5880 static bool
5881 grep_refs(struct ref **refs, regex_t *regex)
5882 {
5883 regmatch_t pmatch;
5884 size_t i = 0;
5886 if (!refs)
5887 return FALSE;
5888 do {
5889 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5890 return TRUE;
5891 } while (refs[i++]->next);
5893 return FALSE;
5894 }
5896 static bool
5897 main_grep(struct view *view, struct line *line)
5898 {
5899 struct commit *commit = line->data;
5900 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5901 char buf[DATE_COLS + 1];
5902 regmatch_t pmatch;
5904 for (state = S_TITLE; state < S_END; state++) {
5905 char *text;
5907 switch (state) {
5908 case S_TITLE: text = commit->title; break;
5909 case S_AUTHOR:
5910 if (!opt_author)
5911 continue;
5912 text = commit->author;
5913 break;
5914 case S_DATE:
5915 if (!opt_date)
5916 continue;
5917 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5918 continue;
5919 text = buf;
5920 break;
5921 case S_REFS:
5922 if (!opt_show_refs)
5923 continue;
5924 if (grep_refs(commit->refs, view->regex) == TRUE)
5925 return TRUE;
5926 continue;
5927 default:
5928 return FALSE;
5929 }
5931 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5932 return TRUE;
5933 }
5935 return FALSE;
5936 }
5938 static void
5939 main_select(struct view *view, struct line *line)
5940 {
5941 struct commit *commit = line->data;
5943 string_copy_rev(view->ref, commit->id);
5944 string_copy_rev(ref_commit, view->ref);
5945 }
5947 static struct view_ops main_ops = {
5948 "commit",
5949 main_argv,
5950 NULL,
5951 main_read,
5952 main_draw,
5953 main_request,
5954 main_grep,
5955 main_select,
5956 };
5959 /*
5960 * Unicode / UTF-8 handling
5961 *
5962 * NOTE: Much of the following code for dealing with unicode is derived from
5963 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
5964 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
5965 */
5967 /* I've (over)annotated a lot of code snippets because I am not entirely
5968 * confident that the approach taken by this small UTF-8 interface is correct.
5969 * --jonas */
5971 static inline int
5972 unicode_width(unsigned long c)
5973 {
5974 if (c >= 0x1100 &&
5975 (c <= 0x115f /* Hangul Jamo */
5976 || c == 0x2329
5977 || c == 0x232a
5978 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
5979 /* CJK ... Yi */
5980 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
5981 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
5982 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
5983 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
5984 || (c >= 0xffe0 && c <= 0xffe6)
5985 || (c >= 0x20000 && c <= 0x2fffd)
5986 || (c >= 0x30000 && c <= 0x3fffd)))
5987 return 2;
5989 if (c == '\t')
5990 return opt_tab_size;
5992 return 1;
5993 }
5995 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
5996 * Illegal bytes are set one. */
5997 static const unsigned char utf8_bytes[256] = {
5998 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,
5999 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,
6000 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,
6001 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,
6002 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,
6003 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,
6004 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,
6005 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,
6006 };
6008 /* Decode UTF-8 multi-byte representation into a unicode character. */
6009 static inline unsigned long
6010 utf8_to_unicode(const char *string, size_t length)
6011 {
6012 unsigned long unicode;
6014 switch (length) {
6015 case 1:
6016 unicode = string[0];
6017 break;
6018 case 2:
6019 unicode = (string[0] & 0x1f) << 6;
6020 unicode += (string[1] & 0x3f);
6021 break;
6022 case 3:
6023 unicode = (string[0] & 0x0f) << 12;
6024 unicode += ((string[1] & 0x3f) << 6);
6025 unicode += (string[2] & 0x3f);
6026 break;
6027 case 4:
6028 unicode = (string[0] & 0x0f) << 18;
6029 unicode += ((string[1] & 0x3f) << 12);
6030 unicode += ((string[2] & 0x3f) << 6);
6031 unicode += (string[3] & 0x3f);
6032 break;
6033 case 5:
6034 unicode = (string[0] & 0x0f) << 24;
6035 unicode += ((string[1] & 0x3f) << 18);
6036 unicode += ((string[2] & 0x3f) << 12);
6037 unicode += ((string[3] & 0x3f) << 6);
6038 unicode += (string[4] & 0x3f);
6039 break;
6040 case 6:
6041 unicode = (string[0] & 0x01) << 30;
6042 unicode += ((string[1] & 0x3f) << 24);
6043 unicode += ((string[2] & 0x3f) << 18);
6044 unicode += ((string[3] & 0x3f) << 12);
6045 unicode += ((string[4] & 0x3f) << 6);
6046 unicode += (string[5] & 0x3f);
6047 break;
6048 default:
6049 die("Invalid unicode length");
6050 }
6052 /* Invalid characters could return the special 0xfffd value but NUL
6053 * should be just as good. */
6054 return unicode > 0xffff ? 0 : unicode;
6055 }
6057 /* Calculates how much of string can be shown within the given maximum width
6058 * and sets trimmed parameter to non-zero value if all of string could not be
6059 * shown. If the reserve flag is TRUE, it will reserve at least one
6060 * trailing character, which can be useful when drawing a delimiter.
6061 *
6062 * Returns the number of bytes to output from string to satisfy max_width. */
6063 static size_t
6064 utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve)
6065 {
6066 const char *start = string;
6067 const char *end = strchr(string, '\0');
6068 unsigned char last_bytes = 0;
6069 size_t last_ucwidth = 0;
6071 *width = 0;
6072 *trimmed = 0;
6074 while (string < end) {
6075 int c = *(unsigned char *) string;
6076 unsigned char bytes = utf8_bytes[c];
6077 size_t ucwidth;
6078 unsigned long unicode;
6080 if (string + bytes > end)
6081 break;
6083 /* Change representation to figure out whether
6084 * it is a single- or double-width character. */
6086 unicode = utf8_to_unicode(string, bytes);
6087 /* FIXME: Graceful handling of invalid unicode character. */
6088 if (!unicode)
6089 break;
6091 ucwidth = unicode_width(unicode);
6092 *width += ucwidth;
6093 if (*width > max_width) {
6094 *trimmed = 1;
6095 *width -= ucwidth;
6096 if (reserve && *width == max_width) {
6097 string -= last_bytes;
6098 *width -= last_ucwidth;
6099 }
6100 break;
6101 }
6103 string += bytes;
6104 last_bytes = bytes;
6105 last_ucwidth = ucwidth;
6106 }
6108 return string - start;
6109 }
6112 /*
6113 * Status management
6114 */
6116 /* Whether or not the curses interface has been initialized. */
6117 static bool cursed = FALSE;
6119 /* The status window is used for polling keystrokes. */
6120 static WINDOW *status_win;
6122 static bool status_empty = FALSE;
6124 /* Update status and title window. */
6125 static void
6126 report(const char *msg, ...)
6127 {
6128 struct view *view = display[current_view];
6130 if (input_mode)
6131 return;
6133 if (!view) {
6134 char buf[SIZEOF_STR];
6135 va_list args;
6137 va_start(args, msg);
6138 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6139 buf[sizeof(buf) - 1] = 0;
6140 buf[sizeof(buf) - 2] = '.';
6141 buf[sizeof(buf) - 3] = '.';
6142 buf[sizeof(buf) - 4] = '.';
6143 }
6144 va_end(args);
6145 die("%s", buf);
6146 }
6148 if (!status_empty || *msg) {
6149 va_list args;
6151 va_start(args, msg);
6153 wmove(status_win, 0, 0);
6154 if (*msg) {
6155 vwprintw(status_win, msg, args);
6156 status_empty = FALSE;
6157 } else {
6158 status_empty = TRUE;
6159 }
6160 wclrtoeol(status_win);
6161 wrefresh(status_win);
6163 va_end(args);
6164 }
6166 update_view_title(view);
6167 update_display_cursor(view);
6168 }
6170 /* Controls when nodelay should be in effect when polling user input. */
6171 static void
6172 set_nonblocking_input(bool loading)
6173 {
6174 static unsigned int loading_views;
6176 if ((loading == FALSE && loading_views-- == 1) ||
6177 (loading == TRUE && loading_views++ == 0))
6178 nodelay(status_win, loading);
6179 }
6181 static void
6182 init_display(void)
6183 {
6184 int x, y;
6186 /* Initialize the curses library */
6187 if (isatty(STDIN_FILENO)) {
6188 cursed = !!initscr();
6189 opt_tty = stdin;
6190 } else {
6191 /* Leave stdin and stdout alone when acting as a pager. */
6192 opt_tty = fopen("/dev/tty", "r+");
6193 if (!opt_tty)
6194 die("Failed to open /dev/tty");
6195 cursed = !!newterm(NULL, opt_tty, opt_tty);
6196 }
6198 if (!cursed)
6199 die("Failed to initialize curses");
6201 nonl(); /* Tell curses not to do NL->CR/NL on output */
6202 cbreak(); /* Take input chars one at a time, no wait for \n */
6203 noecho(); /* Don't echo input */
6204 leaveok(stdscr, TRUE);
6206 if (has_colors())
6207 init_colors();
6209 getmaxyx(stdscr, y, x);
6210 status_win = newwin(1, 0, y - 1, 0);
6211 if (!status_win)
6212 die("Failed to create status window");
6214 /* Enable keyboard mapping */
6215 keypad(status_win, TRUE);
6216 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6218 TABSIZE = opt_tab_size;
6219 if (opt_line_graphics) {
6220 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
6221 }
6222 }
6224 static int
6225 get_input(bool prompting)
6226 {
6227 struct view *view;
6228 int i, key;
6230 if (prompting)
6231 input_mode = TRUE;
6233 while (true) {
6234 foreach_view (view, i)
6235 update_view(view);
6237 /* Refresh, accept single keystroke of input */
6238 key = wgetch(status_win);
6240 /* wgetch() with nodelay() enabled returns ERR when
6241 * there's no input. */
6242 if (key == ERR) {
6243 doupdate();
6245 } else if (key == KEY_RESIZE) {
6246 int height, width;
6248 getmaxyx(stdscr, height, width);
6250 /* Resize the status view first so the cursor is
6251 * placed properly. */
6252 wresize(status_win, 1, width);
6253 mvwin(status_win, height - 1, 0);
6254 wrefresh(status_win);
6255 resize_display();
6256 redraw_display(TRUE);
6258 } else {
6259 input_mode = FALSE;
6260 return key;
6261 }
6262 }
6263 }
6265 static char *
6266 prompt_input(const char *prompt, input_handler handler, void *data)
6267 {
6268 enum input_status status = INPUT_OK;
6269 static char buf[SIZEOF_STR];
6270 size_t pos = 0;
6272 buf[pos] = 0;
6274 while (status == INPUT_OK || status == INPUT_SKIP) {
6275 int key;
6277 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6278 wclrtoeol(status_win);
6280 key = get_input(TRUE);
6281 switch (key) {
6282 case KEY_RETURN:
6283 case KEY_ENTER:
6284 case '\n':
6285 status = pos ? INPUT_STOP : INPUT_CANCEL;
6286 break;
6288 case KEY_BACKSPACE:
6289 if (pos > 0)
6290 buf[--pos] = 0;
6291 else
6292 status = INPUT_CANCEL;
6293 break;
6295 case KEY_ESC:
6296 status = INPUT_CANCEL;
6297 break;
6299 default:
6300 if (pos >= sizeof(buf)) {
6301 report("Input string too long");
6302 return NULL;
6303 }
6305 status = handler(data, buf, key);
6306 if (status == INPUT_OK)
6307 buf[pos++] = (char) key;
6308 }
6309 }
6311 /* Clear the status window */
6312 status_empty = FALSE;
6313 report("");
6315 if (status == INPUT_CANCEL)
6316 return NULL;
6318 buf[pos++] = 0;
6320 return buf;
6321 }
6323 static enum input_status
6324 prompt_yesno_handler(void *data, char *buf, int c)
6325 {
6326 if (c == 'y' || c == 'Y')
6327 return INPUT_STOP;
6328 if (c == 'n' || c == 'N')
6329 return INPUT_CANCEL;
6330 return INPUT_SKIP;
6331 }
6333 static bool
6334 prompt_yesno(const char *prompt)
6335 {
6336 char prompt2[SIZEOF_STR];
6338 if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6339 return FALSE;
6341 return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6342 }
6344 static enum input_status
6345 read_prompt_handler(void *data, char *buf, int c)
6346 {
6347 return isprint(c) ? INPUT_OK : INPUT_SKIP;
6348 }
6350 static char *
6351 read_prompt(const char *prompt)
6352 {
6353 return prompt_input(prompt, read_prompt_handler, NULL);
6354 }
6356 /*
6357 * Repository properties
6358 */
6360 static int
6361 git_properties(const char **argv, const char *separators,
6362 int (*read_property)(char *, size_t, char *, size_t))
6363 {
6364 struct io io = {};
6366 if (init_io_rd(&io, argv, NULL, FORMAT_NONE))
6367 return read_properties(&io, separators, read_property);
6368 return ERR;
6369 }
6371 static struct ref *refs = NULL;
6372 static size_t refs_alloc = 0;
6373 static size_t refs_size = 0;
6375 /* Id <-> ref store */
6376 static struct ref ***id_refs = NULL;
6377 static size_t id_refs_alloc = 0;
6378 static size_t id_refs_size = 0;
6380 static int
6381 compare_refs(const void *ref1_, const void *ref2_)
6382 {
6383 const struct ref *ref1 = *(const struct ref **)ref1_;
6384 const struct ref *ref2 = *(const struct ref **)ref2_;
6386 if (ref1->tag != ref2->tag)
6387 return ref2->tag - ref1->tag;
6388 if (ref1->ltag != ref2->ltag)
6389 return ref2->ltag - ref2->ltag;
6390 if (ref1->head != ref2->head)
6391 return ref2->head - ref1->head;
6392 if (ref1->tracked != ref2->tracked)
6393 return ref2->tracked - ref1->tracked;
6394 if (ref1->remote != ref2->remote)
6395 return ref2->remote - ref1->remote;
6396 return strcmp(ref1->name, ref2->name);
6397 }
6399 static struct ref **
6400 get_refs(const char *id)
6401 {
6402 struct ref ***tmp_id_refs;
6403 struct ref **ref_list = NULL;
6404 size_t ref_list_alloc = 0;
6405 size_t ref_list_size = 0;
6406 size_t i;
6408 for (i = 0; i < id_refs_size; i++)
6409 if (!strcmp(id, id_refs[i][0]->id))
6410 return id_refs[i];
6412 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
6413 sizeof(*id_refs));
6414 if (!tmp_id_refs)
6415 return NULL;
6417 id_refs = tmp_id_refs;
6419 for (i = 0; i < refs_size; i++) {
6420 struct ref **tmp;
6422 if (strcmp(id, refs[i].id))
6423 continue;
6425 tmp = realloc_items(ref_list, &ref_list_alloc,
6426 ref_list_size + 1, sizeof(*ref_list));
6427 if (!tmp) {
6428 if (ref_list)
6429 free(ref_list);
6430 return NULL;
6431 }
6433 ref_list = tmp;
6434 ref_list[ref_list_size] = &refs[i];
6435 /* XXX: The properties of the commit chains ensures that we can
6436 * safely modify the shared ref. The repo references will
6437 * always be similar for the same id. */
6438 ref_list[ref_list_size]->next = 1;
6440 ref_list_size++;
6441 }
6443 if (ref_list) {
6444 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
6445 ref_list[ref_list_size - 1]->next = 0;
6446 id_refs[id_refs_size++] = ref_list;
6447 }
6449 return ref_list;
6450 }
6452 static int
6453 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6454 {
6455 struct ref *ref;
6456 bool tag = FALSE;
6457 bool ltag = FALSE;
6458 bool remote = FALSE;
6459 bool tracked = FALSE;
6460 bool check_replace = FALSE;
6461 bool head = FALSE;
6463 if (!prefixcmp(name, "refs/tags/")) {
6464 if (!suffixcmp(name, namelen, "^{}")) {
6465 namelen -= 3;
6466 name[namelen] = 0;
6467 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
6468 check_replace = TRUE;
6469 } else {
6470 ltag = TRUE;
6471 }
6473 tag = TRUE;
6474 namelen -= STRING_SIZE("refs/tags/");
6475 name += STRING_SIZE("refs/tags/");
6477 } else if (!prefixcmp(name, "refs/remotes/")) {
6478 remote = TRUE;
6479 namelen -= STRING_SIZE("refs/remotes/");
6480 name += STRING_SIZE("refs/remotes/");
6481 tracked = !strcmp(opt_remote, name);
6483 } else if (!prefixcmp(name, "refs/heads/")) {
6484 namelen -= STRING_SIZE("refs/heads/");
6485 name += STRING_SIZE("refs/heads/");
6486 head = !strncmp(opt_head, name, namelen);
6488 } else if (!strcmp(name, "HEAD")) {
6489 string_ncopy(opt_head_rev, id, idlen);
6490 return OK;
6491 }
6493 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
6494 /* it's an annotated tag, replace the previous sha1 with the
6495 * resolved commit id; relies on the fact git-ls-remote lists
6496 * the commit id of an annotated tag right before the commit id
6497 * it points to. */
6498 refs[refs_size - 1].ltag = ltag;
6499 string_copy_rev(refs[refs_size - 1].id, id);
6501 return OK;
6502 }
6503 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
6504 if (!refs)
6505 return ERR;
6507 ref = &refs[refs_size++];
6508 ref->name = malloc(namelen + 1);
6509 if (!ref->name)
6510 return ERR;
6512 strncpy(ref->name, name, namelen);
6513 ref->name[namelen] = 0;
6514 ref->head = head;
6515 ref->tag = tag;
6516 ref->ltag = ltag;
6517 ref->remote = remote;
6518 ref->tracked = tracked;
6519 string_copy_rev(ref->id, id);
6521 return OK;
6522 }
6524 static int
6525 load_refs(void)
6526 {
6527 static const char *ls_remote_argv[SIZEOF_ARG] = {
6528 "git", "ls-remote", ".", NULL
6529 };
6530 static bool init = FALSE;
6532 if (!init) {
6533 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6534 init = TRUE;
6535 }
6537 if (!*opt_git_dir)
6538 return OK;
6540 while (refs_size > 0)
6541 free(refs[--refs_size].name);
6542 while (id_refs_size > 0)
6543 free(id_refs[--id_refs_size]);
6545 return git_properties(ls_remote_argv, "\t", read_ref);
6546 }
6548 static int
6549 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
6550 {
6551 if (!strcmp(name, "i18n.commitencoding"))
6552 string_ncopy(opt_encoding, value, valuelen);
6554 if (!strcmp(name, "core.editor"))
6555 string_ncopy(opt_editor, value, valuelen);
6557 /* branch.<head>.remote */
6558 if (*opt_head &&
6559 !strncmp(name, "branch.", 7) &&
6560 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6561 !strcmp(name + 7 + strlen(opt_head), ".remote"))
6562 string_ncopy(opt_remote, value, valuelen);
6564 if (*opt_head && *opt_remote &&
6565 !strncmp(name, "branch.", 7) &&
6566 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6567 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
6568 size_t from = strlen(opt_remote);
6570 if (!prefixcmp(value, "refs/heads/")) {
6571 value += STRING_SIZE("refs/heads/");
6572 valuelen -= STRING_SIZE("refs/heads/");
6573 }
6575 if (!string_format_from(opt_remote, &from, "/%s", value))
6576 opt_remote[0] = 0;
6577 }
6579 return OK;
6580 }
6582 static int
6583 load_git_config(void)
6584 {
6585 const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
6587 return git_properties(config_list_argv, "=", read_repo_config_option);
6588 }
6590 static int
6591 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
6592 {
6593 if (!opt_git_dir[0]) {
6594 string_ncopy(opt_git_dir, name, namelen);
6596 } else if (opt_is_inside_work_tree == -1) {
6597 /* This can be 3 different values depending on the
6598 * version of git being used. If git-rev-parse does not
6599 * understand --is-inside-work-tree it will simply echo
6600 * the option else either "true" or "false" is printed.
6601 * Default to true for the unknown case. */
6602 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6604 } else if (*name == '.') {
6605 string_ncopy(opt_cdup, name, namelen);
6607 } else {
6608 string_ncopy(opt_prefix, name, namelen);
6609 }
6611 return OK;
6612 }
6614 static int
6615 load_repo_info(void)
6616 {
6617 const char *head_argv[] = {
6618 "git", "symbolic-ref", "HEAD", NULL
6619 };
6620 const char *rev_parse_argv[] = {
6621 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6622 "--show-cdup", "--show-prefix", NULL
6623 };
6625 if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
6626 chomp_string(opt_head);
6627 if (!prefixcmp(opt_head, "refs/heads/")) {
6628 char *offset = opt_head + STRING_SIZE("refs/heads/");
6630 memmove(opt_head, offset, strlen(offset) + 1);
6631 }
6632 }
6634 return git_properties(rev_parse_argv, "=", read_repo_info);
6635 }
6637 static int
6638 read_properties(struct io *io, const char *separators,
6639 int (*read_property)(char *, size_t, char *, size_t))
6640 {
6641 char *name;
6642 int state = OK;
6644 if (!start_io(io))
6645 return ERR;
6647 while (state == OK && (name = io_get(io, '\n', TRUE))) {
6648 char *value;
6649 size_t namelen;
6650 size_t valuelen;
6652 name = chomp_string(name);
6653 namelen = strcspn(name, separators);
6655 if (name[namelen]) {
6656 name[namelen] = 0;
6657 value = chomp_string(name + namelen + 1);
6658 valuelen = strlen(value);
6660 } else {
6661 value = "";
6662 valuelen = 0;
6663 }
6665 state = read_property(name, namelen, value, valuelen);
6666 }
6668 if (state != ERR && io_error(io))
6669 state = ERR;
6670 done_io(io);
6672 return state;
6673 }
6676 /*
6677 * Main
6678 */
6680 static void __NORETURN
6681 quit(int sig)
6682 {
6683 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6684 if (cursed)
6685 endwin();
6686 exit(0);
6687 }
6689 static void __NORETURN
6690 die(const char *err, ...)
6691 {
6692 va_list args;
6694 endwin();
6696 va_start(args, err);
6697 fputs("tig: ", stderr);
6698 vfprintf(stderr, err, args);
6699 fputs("\n", stderr);
6700 va_end(args);
6702 exit(1);
6703 }
6705 static void
6706 warn(const char *msg, ...)
6707 {
6708 va_list args;
6710 va_start(args, msg);
6711 fputs("tig warning: ", stderr);
6712 vfprintf(stderr, msg, args);
6713 fputs("\n", stderr);
6714 va_end(args);
6715 }
6717 int
6718 main(int argc, const char *argv[])
6719 {
6720 const char **run_argv = NULL;
6721 struct view *view;
6722 enum request request;
6723 size_t i;
6725 signal(SIGINT, quit);
6727 if (setlocale(LC_ALL, "")) {
6728 char *codeset = nl_langinfo(CODESET);
6730 string_ncopy(opt_codeset, codeset, strlen(codeset));
6731 }
6733 if (load_repo_info() == ERR)
6734 die("Failed to load repo info.");
6736 if (load_options() == ERR)
6737 die("Failed to load user config.");
6739 if (load_git_config() == ERR)
6740 die("Failed to load repo config.");
6742 request = parse_options(argc, argv, &run_argv);
6743 if (request == REQ_NONE)
6744 return 0;
6746 /* Require a git repository unless when running in pager mode. */
6747 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6748 die("Not a git repository");
6750 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6751 opt_utf8 = FALSE;
6753 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6754 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6755 if (opt_iconv == ICONV_NONE)
6756 die("Failed to initialize character set conversion");
6757 }
6759 if (load_refs() == ERR)
6760 die("Failed to load refs.");
6762 foreach_view (view, i)
6763 argv_from_env(view->ops->argv, view->cmd_env);
6765 init_display();
6767 if (request == REQ_VIEW_PAGER || run_argv) {
6768 if (request == REQ_VIEW_PAGER)
6769 io_open(&VIEW(request)->io, "");
6770 else if (!prepare_update(VIEW(request), run_argv, NULL, FORMAT_NONE))
6771 die("Failed to format arguments");
6772 open_view(NULL, request, OPEN_PREPARED);
6773 request = REQ_NONE;
6774 }
6776 while (view_driver(display[current_view], request)) {
6777 int key = get_input(FALSE);
6779 view = display[current_view];
6780 request = get_keybinding(view->keymap, key);
6782 /* Some low-level request handling. This keeps access to
6783 * status_win restricted. */
6784 switch (request) {
6785 case REQ_PROMPT:
6786 {
6787 char *cmd = read_prompt(":");
6789 if (cmd) {
6790 struct view *next = VIEW(REQ_VIEW_PAGER);
6791 const char *argv[SIZEOF_ARG] = { "git" };
6792 int argc = 1;
6794 /* When running random commands, initially show the
6795 * command in the title. However, it maybe later be
6796 * overwritten if a commit line is selected. */
6797 string_ncopy(next->ref, cmd, strlen(cmd));
6799 if (!argv_from_string(argv, &argc, cmd)) {
6800 report("Too many arguments");
6801 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
6802 report("Failed to format command");
6803 } else {
6804 open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
6805 }
6806 }
6808 request = REQ_NONE;
6809 break;
6810 }
6811 case REQ_SEARCH:
6812 case REQ_SEARCH_BACK:
6813 {
6814 const char *prompt = request == REQ_SEARCH ? "/" : "?";
6815 char *search = read_prompt(prompt);
6817 if (search)
6818 string_ncopy(opt_search, search, strlen(search));
6819 else
6820 request = REQ_NONE;
6821 break;
6822 }
6823 default:
6824 break;
6825 }
6826 }
6828 quit(0);
6830 return 0;
6831 }