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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 int load_refs(void);
72 static size_t utf8_length(const char **string, size_t col, int *width, size_t max_width, int *trimmed, bool reserve);
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
112 #define SCROLL_INTERVAL 1
114 #define TAB_SIZE 8
116 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
118 #define NULL_ID "0000000000000000000000000000000000000000"
120 #ifndef GIT_CONFIG
121 #define GIT_CONFIG "config"
122 #endif
124 /* Some ASCII-shorthands fitted into the ncurses namespace. */
125 #define KEY_TAB '\t'
126 #define KEY_RETURN '\r'
127 #define KEY_ESC 27
130 struct ref {
131 char *name; /* Ref name; tag or head names are shortened. */
132 char id[SIZEOF_REV]; /* Commit SHA1 ID */
133 unsigned int head:1; /* Is it the current HEAD? */
134 unsigned int tag:1; /* Is it a tag? */
135 unsigned int ltag:1; /* If so, is the tag local? */
136 unsigned int remote:1; /* Is it a remote ref? */
137 unsigned int tracked:1; /* Is it the remote for the current HEAD? */
138 unsigned int next:1; /* For ref lists: are there more refs? */
139 };
141 static struct ref **get_refs(const char *id);
143 enum format_flags {
144 FORMAT_ALL, /* Perform replacement in all arguments. */
145 FORMAT_DASH, /* Perform replacement up until "--". */
146 FORMAT_NONE /* No replacement should be performed. */
147 };
149 static bool format_argv(const char *dst[], const char *src[], enum format_flags flags);
151 enum input_status {
152 INPUT_OK,
153 INPUT_SKIP,
154 INPUT_STOP,
155 INPUT_CANCEL
156 };
158 typedef enum input_status (*input_handler)(void *data, char *buf, int c);
160 static char *prompt_input(const char *prompt, input_handler handler, void *data);
161 static bool prompt_yesno(const char *prompt);
163 /*
164 * String helpers
165 */
167 static inline void
168 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
169 {
170 if (srclen > dstlen - 1)
171 srclen = dstlen - 1;
173 strncpy(dst, src, srclen);
174 dst[srclen] = 0;
175 }
177 /* Shorthands for safely copying into a fixed buffer. */
179 #define string_copy(dst, src) \
180 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
182 #define string_ncopy(dst, src, srclen) \
183 string_ncopy_do(dst, sizeof(dst), src, srclen)
185 #define string_copy_rev(dst, src) \
186 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
188 #define string_add(dst, from, src) \
189 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
191 static size_t
192 string_expand_length(const char *line, int tabsize)
193 {
194 size_t size, pos;
196 for (size = pos = 0; line[pos]; pos++) {
197 if (line[pos] == '\t' && tabsize > 0)
198 size += tabsize - (size % tabsize);
199 else
200 size++;
201 }
202 return size;
203 }
205 static void
206 string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
207 {
208 size_t size, pos;
210 for (size = pos = 0; size < dstlen - 1 && src[pos]; pos++) {
211 if (src[pos] == '\t') {
212 size_t expanded = tabsize - (size % tabsize);
214 if (expanded + size >= dstlen - 1)
215 expanded = dstlen - size - 1;
216 memcpy(dst + size, " ", expanded);
217 size += expanded;
218 } else {
219 dst[size++] = src[pos];
220 }
221 }
223 dst[size] = 0;
224 }
226 static char *
227 chomp_string(char *name)
228 {
229 int namelen;
231 while (isspace(*name))
232 name++;
234 namelen = strlen(name) - 1;
235 while (namelen > 0 && isspace(name[namelen]))
236 name[namelen--] = 0;
238 return name;
239 }
241 static bool
242 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
243 {
244 va_list args;
245 size_t pos = bufpos ? *bufpos : 0;
247 va_start(args, fmt);
248 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
249 va_end(args);
251 if (bufpos)
252 *bufpos = pos;
254 return pos >= bufsize ? FALSE : TRUE;
255 }
257 #define string_format(buf, fmt, args...) \
258 string_nformat(buf, sizeof(buf), NULL, fmt, args)
260 #define string_format_from(buf, from, fmt, args...) \
261 string_nformat(buf, sizeof(buf), from, fmt, args)
263 static int
264 string_enum_compare(const char *str1, const char *str2, int len)
265 {
266 size_t i;
268 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
270 /* Diff-Header == DIFF_HEADER */
271 for (i = 0; i < len; i++) {
272 if (toupper(str1[i]) == toupper(str2[i]))
273 continue;
275 if (string_enum_sep(str1[i]) &&
276 string_enum_sep(str2[i]))
277 continue;
279 return str1[i] - str2[i];
280 }
282 return 0;
283 }
285 struct enum_map {
286 const char *name;
287 int namelen;
288 int value;
289 };
291 #define ENUM_MAP(name, value) { name, STRING_SIZE(name), value }
293 static bool
294 map_enum_do(struct enum_map *map, size_t map_size, int *value, const char *name)
295 {
296 size_t namelen = strlen(name);
297 int i;
299 for (i = 0; i < map_size; i++)
300 if (namelen == map[i].namelen &&
301 !string_enum_compare(name, map[i].name, namelen)) {
302 *value = map[i].value;
303 return TRUE;
304 }
306 return FALSE;
307 }
309 #define map_enum(attr, map, name) \
310 map_enum_do(map, ARRAY_SIZE(map), attr, name)
312 #define prefixcmp(str1, str2) \
313 strncmp(str1, str2, STRING_SIZE(str2))
315 static inline int
316 suffixcmp(const char *str, int slen, const char *suffix)
317 {
318 size_t len = slen >= 0 ? slen : strlen(str);
319 size_t suffixlen = strlen(suffix);
321 return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
322 }
325 static bool
326 argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
327 {
328 int valuelen;
330 while (*cmd && *argc < SIZEOF_ARG && (valuelen = strcspn(cmd, " \t"))) {
331 bool advance = cmd[valuelen] != 0;
333 cmd[valuelen] = 0;
334 argv[(*argc)++] = chomp_string(cmd);
335 cmd = chomp_string(cmd + valuelen + advance);
336 }
338 if (*argc < SIZEOF_ARG)
339 argv[*argc] = NULL;
340 return *argc < SIZEOF_ARG;
341 }
343 static void
344 argv_from_env(const char **argv, const char *name)
345 {
346 char *env = argv ? getenv(name) : NULL;
347 int argc = 0;
349 if (env && *env)
350 env = strdup(env);
351 if (env && !argv_from_string(argv, &argc, env))
352 die("Too many arguments in the `%s` environment variable", name);
353 }
356 /*
357 * Executing external commands.
358 */
360 enum io_type {
361 IO_FD, /* File descriptor based IO. */
362 IO_BG, /* Execute command in the background. */
363 IO_FG, /* Execute command with same std{in,out,err}. */
364 IO_RD, /* Read only fork+exec IO. */
365 IO_WR, /* Write only fork+exec IO. */
366 IO_AP, /* Append fork+exec output to file. */
367 };
369 struct io {
370 enum io_type type; /* The requested type of pipe. */
371 const char *dir; /* Directory from which to execute. */
372 pid_t pid; /* Pipe for reading or writing. */
373 int pipe; /* Pipe end for reading or writing. */
374 int error; /* Error status. */
375 const char *argv[SIZEOF_ARG]; /* Shell command arguments. */
376 char *buf; /* Read buffer. */
377 size_t bufalloc; /* Allocated buffer size. */
378 size_t bufsize; /* Buffer content size. */
379 char *bufpos; /* Current buffer position. */
380 unsigned int eof:1; /* Has end of file been reached. */
381 };
383 static void
384 reset_io(struct io *io)
385 {
386 io->pipe = -1;
387 io->pid = 0;
388 io->buf = io->bufpos = NULL;
389 io->bufalloc = io->bufsize = 0;
390 io->error = 0;
391 io->eof = 0;
392 }
394 static void
395 init_io(struct io *io, const char *dir, enum io_type type)
396 {
397 reset_io(io);
398 io->type = type;
399 io->dir = dir;
400 }
402 static bool
403 init_io_rd(struct io *io, const char *argv[], const char *dir,
404 enum format_flags flags)
405 {
406 init_io(io, dir, IO_RD);
407 return format_argv(io->argv, argv, flags);
408 }
410 static bool
411 io_open(struct io *io, const char *name)
412 {
413 init_io(io, NULL, IO_FD);
414 io->pipe = *name ? open(name, O_RDONLY) : STDIN_FILENO;
415 return io->pipe != -1;
416 }
418 static bool
419 kill_io(struct io *io)
420 {
421 return io->pid == 0 || kill(io->pid, SIGKILL) != -1;
422 }
424 static bool
425 done_io(struct io *io)
426 {
427 pid_t pid = io->pid;
429 if (io->pipe != -1)
430 close(io->pipe);
431 free(io->buf);
432 reset_io(io);
434 while (pid > 0) {
435 int status;
436 pid_t waiting = waitpid(pid, &status, 0);
438 if (waiting < 0) {
439 if (errno == EINTR)
440 continue;
441 report("waitpid failed (%s)", strerror(errno));
442 return FALSE;
443 }
445 return waiting == pid &&
446 !WIFSIGNALED(status) &&
447 WIFEXITED(status) &&
448 !WEXITSTATUS(status);
449 }
451 return TRUE;
452 }
454 static bool
455 start_io(struct io *io)
456 {
457 int pipefds[2] = { -1, -1 };
459 if (io->type == IO_FD)
460 return TRUE;
462 if ((io->type == IO_RD || io->type == IO_WR) &&
463 pipe(pipefds) < 0)
464 return FALSE;
465 else if (io->type == IO_AP)
466 pipefds[1] = io->pipe;
468 if ((io->pid = fork())) {
469 if (pipefds[!(io->type == IO_WR)] != -1)
470 close(pipefds[!(io->type == IO_WR)]);
471 if (io->pid != -1) {
472 io->pipe = pipefds[!!(io->type == IO_WR)];
473 return TRUE;
474 }
476 } else {
477 if (io->type != IO_FG) {
478 int devnull = open("/dev/null", O_RDWR);
479 int readfd = io->type == IO_WR ? pipefds[0] : devnull;
480 int writefd = (io->type == IO_RD || io->type == IO_AP)
481 ? pipefds[1] : devnull;
483 dup2(readfd, STDIN_FILENO);
484 dup2(writefd, STDOUT_FILENO);
485 dup2(devnull, STDERR_FILENO);
487 close(devnull);
488 if (pipefds[0] != -1)
489 close(pipefds[0]);
490 if (pipefds[1] != -1)
491 close(pipefds[1]);
492 }
494 if (io->dir && *io->dir && chdir(io->dir) == -1)
495 die("Failed to change directory: %s", strerror(errno));
497 execvp(io->argv[0], (char *const*) io->argv);
498 die("Failed to execute program: %s", strerror(errno));
499 }
501 if (pipefds[!!(io->type == IO_WR)] != -1)
502 close(pipefds[!!(io->type == IO_WR)]);
503 return FALSE;
504 }
506 static bool
507 run_io(struct io *io, const char **argv, const char *dir, enum io_type type)
508 {
509 init_io(io, dir, type);
510 if (!format_argv(io->argv, argv, FORMAT_NONE))
511 return FALSE;
512 return start_io(io);
513 }
515 static int
516 run_io_do(struct io *io)
517 {
518 return start_io(io) && done_io(io);
519 }
521 static int
522 run_io_bg(const char **argv)
523 {
524 struct io io = {};
526 init_io(&io, NULL, IO_BG);
527 if (!format_argv(io.argv, argv, FORMAT_NONE))
528 return FALSE;
529 return run_io_do(&io);
530 }
532 static bool
533 run_io_fg(const char **argv, const char *dir)
534 {
535 struct io io = {};
537 init_io(&io, dir, IO_FG);
538 if (!format_argv(io.argv, argv, FORMAT_NONE))
539 return FALSE;
540 return run_io_do(&io);
541 }
543 static bool
544 run_io_append(const char **argv, enum format_flags flags, int fd)
545 {
546 struct io io = {};
548 init_io(&io, NULL, IO_AP);
549 io.pipe = fd;
550 if (format_argv(io.argv, argv, flags))
551 return run_io_do(&io);
552 close(fd);
553 return FALSE;
554 }
556 static bool
557 run_io_rd(struct io *io, const char **argv, enum format_flags flags)
558 {
559 return init_io_rd(io, argv, NULL, flags) && start_io(io);
560 }
562 static bool
563 io_eof(struct io *io)
564 {
565 return io->eof;
566 }
568 static int
569 io_error(struct io *io)
570 {
571 return io->error;
572 }
574 static bool
575 io_strerror(struct io *io)
576 {
577 return strerror(io->error);
578 }
580 static bool
581 io_can_read(struct io *io)
582 {
583 struct timeval tv = { 0, 500 };
584 fd_set fds;
586 FD_ZERO(&fds);
587 FD_SET(io->pipe, &fds);
589 return select(io->pipe + 1, &fds, NULL, NULL, &tv) > 0;
590 }
592 static ssize_t
593 io_read(struct io *io, void *buf, size_t bufsize)
594 {
595 do {
596 ssize_t readsize = read(io->pipe, buf, bufsize);
598 if (readsize < 0 && (errno == EAGAIN || errno == EINTR))
599 continue;
600 else if (readsize == -1)
601 io->error = errno;
602 else if (readsize == 0)
603 io->eof = 1;
604 return readsize;
605 } while (1);
606 }
608 static char *
609 io_get(struct io *io, int c, bool can_read)
610 {
611 char *eol;
612 ssize_t readsize;
614 if (!io->buf) {
615 io->buf = io->bufpos = malloc(BUFSIZ);
616 if (!io->buf)
617 return NULL;
618 io->bufalloc = BUFSIZ;
619 io->bufsize = 0;
620 }
622 while (TRUE) {
623 if (io->bufsize > 0) {
624 eol = memchr(io->bufpos, c, io->bufsize);
625 if (eol) {
626 char *line = io->bufpos;
628 *eol = 0;
629 io->bufpos = eol + 1;
630 io->bufsize -= io->bufpos - line;
631 return line;
632 }
633 }
635 if (io_eof(io)) {
636 if (io->bufsize) {
637 io->bufpos[io->bufsize] = 0;
638 io->bufsize = 0;
639 return io->bufpos;
640 }
641 return NULL;
642 }
644 if (!can_read)
645 return NULL;
647 if (io->bufsize > 0 && io->bufpos > io->buf)
648 memmove(io->buf, io->bufpos, io->bufsize);
650 io->bufpos = io->buf;
651 readsize = io_read(io, io->buf + io->bufsize, io->bufalloc - io->bufsize);
652 if (io_error(io))
653 return NULL;
654 io->bufsize += readsize;
655 }
656 }
658 static bool
659 io_write(struct io *io, const void *buf, size_t bufsize)
660 {
661 size_t written = 0;
663 while (!io_error(io) && written < bufsize) {
664 ssize_t size;
666 size = write(io->pipe, buf + written, bufsize - written);
667 if (size < 0 && (errno == EAGAIN || errno == EINTR))
668 continue;
669 else if (size == -1)
670 io->error = errno;
671 else
672 written += size;
673 }
675 return written == bufsize;
676 }
678 static bool
679 io_read_buf(struct io *io, char buf[], size_t bufsize)
680 {
681 bool error;
683 io->buf = io->bufpos = buf;
684 io->bufalloc = bufsize;
685 error = !io_get(io, '\n', TRUE) && io_error(io);
686 io->buf = NULL;
688 return done_io(io) || error;
689 }
691 static bool
692 run_io_buf(const char **argv, char buf[], size_t bufsize)
693 {
694 struct io io = {};
696 return run_io_rd(&io, argv, FORMAT_NONE) && io_read_buf(&io, buf, bufsize);
697 }
699 static int
700 io_load(struct io *io, const char *separators,
701 int (*read_property)(char *, size_t, char *, size_t))
702 {
703 char *name;
704 int state = OK;
706 if (!start_io(io))
707 return ERR;
709 while (state == OK && (name = io_get(io, '\n', TRUE))) {
710 char *value;
711 size_t namelen;
712 size_t valuelen;
714 name = chomp_string(name);
715 namelen = strcspn(name, separators);
717 if (name[namelen]) {
718 name[namelen] = 0;
719 value = chomp_string(name + namelen + 1);
720 valuelen = strlen(value);
722 } else {
723 value = "";
724 valuelen = 0;
725 }
727 state = read_property(name, namelen, value, valuelen);
728 }
730 if (state != ERR && io_error(io))
731 state = ERR;
732 done_io(io);
734 return state;
735 }
737 static int
738 run_io_load(const char **argv, const char *separators,
739 int (*read_property)(char *, size_t, char *, size_t))
740 {
741 struct io io = {};
743 return init_io_rd(&io, argv, NULL, FORMAT_NONE)
744 ? io_load(&io, separators, read_property) : ERR;
745 }
748 /*
749 * User requests
750 */
752 #define REQ_INFO \
753 /* XXX: Keep the view request first and in sync with views[]. */ \
754 REQ_GROUP("View switching") \
755 REQ_(VIEW_MAIN, "Show main view"), \
756 REQ_(VIEW_DIFF, "Show diff view"), \
757 REQ_(VIEW_LOG, "Show log view"), \
758 REQ_(VIEW_TREE, "Show tree view"), \
759 REQ_(VIEW_BLOB, "Show blob view"), \
760 REQ_(VIEW_BLAME, "Show blame view"), \
761 REQ_(VIEW_HELP, "Show help page"), \
762 REQ_(VIEW_PAGER, "Show pager view"), \
763 REQ_(VIEW_STATUS, "Show status view"), \
764 REQ_(VIEW_STAGE, "Show stage view"), \
765 \
766 REQ_GROUP("View manipulation") \
767 REQ_(ENTER, "Enter current line and scroll"), \
768 REQ_(NEXT, "Move to next"), \
769 REQ_(PREVIOUS, "Move to previous"), \
770 REQ_(PARENT, "Move to parent"), \
771 REQ_(VIEW_NEXT, "Move focus to next view"), \
772 REQ_(REFRESH, "Reload and refresh"), \
773 REQ_(MAXIMIZE, "Maximize the current view"), \
774 REQ_(VIEW_CLOSE, "Close the current view"), \
775 REQ_(QUIT, "Close all views and quit"), \
776 \
777 REQ_GROUP("View specific requests") \
778 REQ_(STATUS_UPDATE, "Update file status"), \
779 REQ_(STATUS_REVERT, "Revert file changes"), \
780 REQ_(STATUS_MERGE, "Merge file using external tool"), \
781 REQ_(STAGE_NEXT, "Find next chunk to stage"), \
782 \
783 REQ_GROUP("Cursor navigation") \
784 REQ_(MOVE_UP, "Move cursor one line up"), \
785 REQ_(MOVE_DOWN, "Move cursor one line down"), \
786 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
787 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
788 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
789 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
790 \
791 REQ_GROUP("Scrolling") \
792 REQ_(SCROLL_LEFT, "Scroll two columns left"), \
793 REQ_(SCROLL_RIGHT, "Scroll two columns right"), \
794 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
795 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
796 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
797 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
798 \
799 REQ_GROUP("Searching") \
800 REQ_(SEARCH, "Search the view"), \
801 REQ_(SEARCH_BACK, "Search backwards in the view"), \
802 REQ_(FIND_NEXT, "Find next search match"), \
803 REQ_(FIND_PREV, "Find previous search match"), \
804 \
805 REQ_GROUP("Option manipulation") \
806 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
807 REQ_(TOGGLE_DATE, "Toggle date display"), \
808 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
809 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
810 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
811 \
812 REQ_GROUP("Misc") \
813 REQ_(PROMPT, "Bring up the prompt"), \
814 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
815 REQ_(SHOW_VERSION, "Show version information"), \
816 REQ_(STOP_LOADING, "Stop all loading views"), \
817 REQ_(EDIT, "Open in editor"), \
818 REQ_(NONE, "Do nothing")
821 /* User action requests. */
822 enum request {
823 #define REQ_GROUP(help)
824 #define REQ_(req, help) REQ_##req
826 /* Offset all requests to avoid conflicts with ncurses getch values. */
827 REQ_OFFSET = KEY_MAX + 1,
828 REQ_INFO
830 #undef REQ_GROUP
831 #undef REQ_
832 };
834 struct request_info {
835 enum request request;
836 const char *name;
837 int namelen;
838 const char *help;
839 };
841 static struct request_info req_info[] = {
842 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
843 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
844 REQ_INFO
845 #undef REQ_GROUP
846 #undef REQ_
847 };
849 static enum request
850 get_request(const char *name)
851 {
852 int namelen = strlen(name);
853 int i;
855 for (i = 0; i < ARRAY_SIZE(req_info); i++)
856 if (req_info[i].namelen == namelen &&
857 !string_enum_compare(req_info[i].name, name, namelen))
858 return req_info[i].request;
860 return REQ_NONE;
861 }
864 /*
865 * Options
866 */
868 /* Option and state variables. */
869 static bool opt_date = TRUE;
870 static bool opt_author = TRUE;
871 static bool opt_line_number = FALSE;
872 static bool opt_line_graphics = TRUE;
873 static bool opt_rev_graph = FALSE;
874 static bool opt_show_refs = TRUE;
875 static int opt_num_interval = NUMBER_INTERVAL;
876 static int opt_tab_size = TAB_SIZE;
877 static int opt_author_cols = AUTHOR_COLS-1;
878 static char opt_path[SIZEOF_STR] = "";
879 static char opt_file[SIZEOF_STR] = "";
880 static char opt_ref[SIZEOF_REF] = "";
881 static char opt_head[SIZEOF_REF] = "";
882 static char opt_head_rev[SIZEOF_REV] = "";
883 static char opt_remote[SIZEOF_REF] = "";
884 static char opt_encoding[20] = "UTF-8";
885 static bool opt_utf8 = TRUE;
886 static char opt_codeset[20] = "UTF-8";
887 static iconv_t opt_iconv = ICONV_NONE;
888 static char opt_search[SIZEOF_STR] = "";
889 static char opt_cdup[SIZEOF_STR] = "";
890 static char opt_prefix[SIZEOF_STR] = "";
891 static char opt_git_dir[SIZEOF_STR] = "";
892 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
893 static char opt_editor[SIZEOF_STR] = "";
894 static FILE *opt_tty = NULL;
896 #define is_initial_commit() (!*opt_head_rev)
897 #define is_head_commit(rev) (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
900 /*
901 * Line-oriented content detection.
902 */
904 #define LINE_INFO \
905 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
906 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
907 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
908 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
909 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
910 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
911 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
912 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
913 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
914 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
915 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
916 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
917 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
918 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
919 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
920 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
921 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
922 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
923 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
924 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
925 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
926 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
927 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
928 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
929 LINE(AUTHOR, "author ", COLOR_GREEN, COLOR_DEFAULT, 0), \
930 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
931 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
932 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
933 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
934 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
935 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
936 LINE(DELIMITER, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
937 LINE(DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
938 LINE(MODE, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
939 LINE(LINE_NUMBER, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
940 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
941 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
942 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
943 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
944 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
945 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
946 LINE(MAIN_TRACKED, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
947 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
948 LINE(MAIN_HEAD, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
949 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
950 LINE(TREE_HEAD, "", COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD), \
951 LINE(TREE_DIR, "", COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL), \
952 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
953 LINE(STAT_HEAD, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
954 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
955 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
956 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
957 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
958 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
959 LINE(BLAME_ID, "", COLOR_MAGENTA, COLOR_DEFAULT, 0)
961 enum line_type {
962 #define LINE(type, line, fg, bg, attr) \
963 LINE_##type
964 LINE_INFO,
965 LINE_NONE
966 #undef LINE
967 };
969 struct line_info {
970 const char *name; /* Option name. */
971 int namelen; /* Size of option name. */
972 const char *line; /* The start of line to match. */
973 int linelen; /* Size of string to match. */
974 int fg, bg, attr; /* Color and text attributes for the lines. */
975 };
977 static struct line_info line_info[] = {
978 #define LINE(type, line, fg, bg, attr) \
979 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
980 LINE_INFO
981 #undef LINE
982 };
984 static enum line_type
985 get_line_type(const char *line)
986 {
987 int linelen = strlen(line);
988 enum line_type type;
990 for (type = 0; type < ARRAY_SIZE(line_info); type++)
991 /* Case insensitive search matches Signed-off-by lines better. */
992 if (linelen >= line_info[type].linelen &&
993 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
994 return type;
996 return LINE_DEFAULT;
997 }
999 static inline int
1000 get_line_attr(enum line_type type)
1001 {
1002 assert(type < ARRAY_SIZE(line_info));
1003 return COLOR_PAIR(type) | line_info[type].attr;
1004 }
1006 static struct line_info *
1007 get_line_info(const char *name)
1008 {
1009 size_t namelen = strlen(name);
1010 enum line_type type;
1012 for (type = 0; type < ARRAY_SIZE(line_info); type++)
1013 if (namelen == line_info[type].namelen &&
1014 !string_enum_compare(line_info[type].name, name, namelen))
1015 return &line_info[type];
1017 return NULL;
1018 }
1020 static void
1021 init_colors(void)
1022 {
1023 int default_bg = line_info[LINE_DEFAULT].bg;
1024 int default_fg = line_info[LINE_DEFAULT].fg;
1025 enum line_type type;
1027 start_color();
1029 if (assume_default_colors(default_fg, default_bg) == ERR) {
1030 default_bg = COLOR_BLACK;
1031 default_fg = COLOR_WHITE;
1032 }
1034 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
1035 struct line_info *info = &line_info[type];
1036 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
1037 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
1039 init_pair(type, fg, bg);
1040 }
1041 }
1043 struct line {
1044 enum line_type type;
1046 /* State flags */
1047 unsigned int selected:1;
1048 unsigned int dirty:1;
1049 unsigned int cleareol:1;
1051 void *data; /* User data */
1052 };
1055 /*
1056 * Keys
1057 */
1059 struct keybinding {
1060 int alias;
1061 enum request request;
1062 };
1064 static struct keybinding default_keybindings[] = {
1065 /* View switching */
1066 { 'm', REQ_VIEW_MAIN },
1067 { 'd', REQ_VIEW_DIFF },
1068 { 'l', REQ_VIEW_LOG },
1069 { 't', REQ_VIEW_TREE },
1070 { 'f', REQ_VIEW_BLOB },
1071 { 'B', REQ_VIEW_BLAME },
1072 { 'p', REQ_VIEW_PAGER },
1073 { 'h', REQ_VIEW_HELP },
1074 { 'S', REQ_VIEW_STATUS },
1075 { 'c', REQ_VIEW_STAGE },
1077 /* View manipulation */
1078 { 'q', REQ_VIEW_CLOSE },
1079 { KEY_TAB, REQ_VIEW_NEXT },
1080 { KEY_RETURN, REQ_ENTER },
1081 { KEY_UP, REQ_PREVIOUS },
1082 { KEY_DOWN, REQ_NEXT },
1083 { 'R', REQ_REFRESH },
1084 { KEY_F(5), REQ_REFRESH },
1085 { 'O', REQ_MAXIMIZE },
1087 /* Cursor navigation */
1088 { 'k', REQ_MOVE_UP },
1089 { 'j', REQ_MOVE_DOWN },
1090 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1091 { KEY_END, REQ_MOVE_LAST_LINE },
1092 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1093 { ' ', REQ_MOVE_PAGE_DOWN },
1094 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1095 { 'b', REQ_MOVE_PAGE_UP },
1096 { '-', REQ_MOVE_PAGE_UP },
1098 /* Scrolling */
1099 { KEY_LEFT, REQ_SCROLL_LEFT },
1100 { KEY_RIGHT, REQ_SCROLL_RIGHT },
1101 { KEY_IC, REQ_SCROLL_LINE_UP },
1102 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1103 { 'w', REQ_SCROLL_PAGE_UP },
1104 { 's', REQ_SCROLL_PAGE_DOWN },
1106 /* Searching */
1107 { '/', REQ_SEARCH },
1108 { '?', REQ_SEARCH_BACK },
1109 { 'n', REQ_FIND_NEXT },
1110 { 'N', REQ_FIND_PREV },
1112 /* Misc */
1113 { 'Q', REQ_QUIT },
1114 { 'z', REQ_STOP_LOADING },
1115 { 'v', REQ_SHOW_VERSION },
1116 { 'r', REQ_SCREEN_REDRAW },
1117 { '.', REQ_TOGGLE_LINENO },
1118 { 'D', REQ_TOGGLE_DATE },
1119 { 'A', REQ_TOGGLE_AUTHOR },
1120 { 'g', REQ_TOGGLE_REV_GRAPH },
1121 { 'F', REQ_TOGGLE_REFS },
1122 { ':', REQ_PROMPT },
1123 { 'u', REQ_STATUS_UPDATE },
1124 { '!', REQ_STATUS_REVERT },
1125 { 'M', REQ_STATUS_MERGE },
1126 { '@', REQ_STAGE_NEXT },
1127 { ',', REQ_PARENT },
1128 { 'e', REQ_EDIT },
1129 };
1131 #define KEYMAP_INFO \
1132 KEYMAP_(GENERIC), \
1133 KEYMAP_(MAIN), \
1134 KEYMAP_(DIFF), \
1135 KEYMAP_(LOG), \
1136 KEYMAP_(TREE), \
1137 KEYMAP_(BLOB), \
1138 KEYMAP_(BLAME), \
1139 KEYMAP_(PAGER), \
1140 KEYMAP_(HELP), \
1141 KEYMAP_(STATUS), \
1142 KEYMAP_(STAGE)
1144 enum keymap {
1145 #define KEYMAP_(name) KEYMAP_##name
1146 KEYMAP_INFO
1147 #undef KEYMAP_
1148 };
1150 static struct enum_map keymap_table[] = {
1151 #define KEYMAP_(name) ENUM_MAP(#name, KEYMAP_##name)
1152 KEYMAP_INFO
1153 #undef KEYMAP_
1154 };
1156 #define set_keymap(map, name) map_enum(map, keymap_table, name)
1158 struct keybinding_table {
1159 struct keybinding *data;
1160 size_t size;
1161 };
1163 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
1165 static void
1166 add_keybinding(enum keymap keymap, enum request request, int key)
1167 {
1168 struct keybinding_table *table = &keybindings[keymap];
1170 table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
1171 if (!table->data)
1172 die("Failed to allocate keybinding");
1173 table->data[table->size].alias = key;
1174 table->data[table->size++].request = request;
1175 }
1177 /* Looks for a key binding first in the given map, then in the generic map, and
1178 * lastly in the default keybindings. */
1179 static enum request
1180 get_keybinding(enum keymap keymap, int key)
1181 {
1182 size_t i;
1184 for (i = 0; i < keybindings[keymap].size; i++)
1185 if (keybindings[keymap].data[i].alias == key)
1186 return keybindings[keymap].data[i].request;
1188 for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
1189 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
1190 return keybindings[KEYMAP_GENERIC].data[i].request;
1192 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
1193 if (default_keybindings[i].alias == key)
1194 return default_keybindings[i].request;
1196 return (enum request) key;
1197 }
1200 struct key {
1201 const char *name;
1202 int value;
1203 };
1205 static struct key key_table[] = {
1206 { "Enter", KEY_RETURN },
1207 { "Space", ' ' },
1208 { "Backspace", KEY_BACKSPACE },
1209 { "Tab", KEY_TAB },
1210 { "Escape", KEY_ESC },
1211 { "Left", KEY_LEFT },
1212 { "Right", KEY_RIGHT },
1213 { "Up", KEY_UP },
1214 { "Down", KEY_DOWN },
1215 { "Insert", KEY_IC },
1216 { "Delete", KEY_DC },
1217 { "Hash", '#' },
1218 { "Home", KEY_HOME },
1219 { "End", KEY_END },
1220 { "PageUp", KEY_PPAGE },
1221 { "PageDown", KEY_NPAGE },
1222 { "F1", KEY_F(1) },
1223 { "F2", KEY_F(2) },
1224 { "F3", KEY_F(3) },
1225 { "F4", KEY_F(4) },
1226 { "F5", KEY_F(5) },
1227 { "F6", KEY_F(6) },
1228 { "F7", KEY_F(7) },
1229 { "F8", KEY_F(8) },
1230 { "F9", KEY_F(9) },
1231 { "F10", KEY_F(10) },
1232 { "F11", KEY_F(11) },
1233 { "F12", KEY_F(12) },
1234 };
1236 static int
1237 get_key_value(const char *name)
1238 {
1239 int i;
1241 for (i = 0; i < ARRAY_SIZE(key_table); i++)
1242 if (!strcasecmp(key_table[i].name, name))
1243 return key_table[i].value;
1245 if (strlen(name) == 1 && isprint(*name))
1246 return (int) *name;
1248 return ERR;
1249 }
1251 static const char *
1252 get_key_name(int key_value)
1253 {
1254 static char key_char[] = "'X'";
1255 const char *seq = NULL;
1256 int key;
1258 for (key = 0; key < ARRAY_SIZE(key_table); key++)
1259 if (key_table[key].value == key_value)
1260 seq = key_table[key].name;
1262 if (seq == NULL &&
1263 key_value < 127 &&
1264 isprint(key_value)) {
1265 key_char[1] = (char) key_value;
1266 seq = key_char;
1267 }
1269 return seq ? seq : "(no key)";
1270 }
1272 static const char *
1273 get_key(enum request request)
1274 {
1275 static char buf[BUFSIZ];
1276 size_t pos = 0;
1277 char *sep = "";
1278 int i;
1280 buf[pos] = 0;
1282 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
1283 struct keybinding *keybinding = &default_keybindings[i];
1285 if (keybinding->request != request)
1286 continue;
1288 if (!string_format_from(buf, &pos, "%s%s", sep,
1289 get_key_name(keybinding->alias)))
1290 return "Too many keybindings!";
1291 sep = ", ";
1292 }
1294 return buf;
1295 }
1297 struct run_request {
1298 enum keymap keymap;
1299 int key;
1300 const char *argv[SIZEOF_ARG];
1301 };
1303 static struct run_request *run_request;
1304 static size_t run_requests;
1306 static enum request
1307 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
1308 {
1309 struct run_request *req;
1311 if (argc >= ARRAY_SIZE(req->argv) - 1)
1312 return REQ_NONE;
1314 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1315 if (!req)
1316 return REQ_NONE;
1318 run_request = req;
1319 req = &run_request[run_requests];
1320 req->keymap = keymap;
1321 req->key = key;
1322 req->argv[0] = NULL;
1324 if (!format_argv(req->argv, argv, FORMAT_NONE))
1325 return REQ_NONE;
1327 return REQ_NONE + ++run_requests;
1328 }
1330 static struct run_request *
1331 get_run_request(enum request request)
1332 {
1333 if (request <= REQ_NONE)
1334 return NULL;
1335 return &run_request[request - REQ_NONE - 1];
1336 }
1338 static void
1339 add_builtin_run_requests(void)
1340 {
1341 const char *cherry_pick[] = { "git", "cherry-pick", "%(commit)", NULL };
1342 const char *gc[] = { "git", "gc", NULL };
1343 struct {
1344 enum keymap keymap;
1345 int key;
1346 int argc;
1347 const char **argv;
1348 } reqs[] = {
1349 { KEYMAP_MAIN, 'C', ARRAY_SIZE(cherry_pick) - 1, cherry_pick },
1350 { KEYMAP_GENERIC, 'G', ARRAY_SIZE(gc) - 1, gc },
1351 };
1352 int i;
1354 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1355 enum request req;
1357 req = add_run_request(reqs[i].keymap, reqs[i].key, reqs[i].argc, reqs[i].argv);
1358 if (req != REQ_NONE)
1359 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1360 }
1361 }
1363 /*
1364 * User config file handling.
1365 */
1367 static int config_lineno;
1368 static bool config_errors;
1369 static const char *config_msg;
1371 static struct enum_map color_map[] = {
1372 #define COLOR_MAP(name) ENUM_MAP(#name, COLOR_##name)
1373 COLOR_MAP(DEFAULT),
1374 COLOR_MAP(BLACK),
1375 COLOR_MAP(BLUE),
1376 COLOR_MAP(CYAN),
1377 COLOR_MAP(GREEN),
1378 COLOR_MAP(MAGENTA),
1379 COLOR_MAP(RED),
1380 COLOR_MAP(WHITE),
1381 COLOR_MAP(YELLOW),
1382 };
1384 static struct enum_map attr_map[] = {
1385 #define ATTR_MAP(name) ENUM_MAP(#name, A_##name)
1386 ATTR_MAP(NORMAL),
1387 ATTR_MAP(BLINK),
1388 ATTR_MAP(BOLD),
1389 ATTR_MAP(DIM),
1390 ATTR_MAP(REVERSE),
1391 ATTR_MAP(STANDOUT),
1392 ATTR_MAP(UNDERLINE),
1393 };
1395 #define set_attribute(attr, name) map_enum(attr, attr_map, name)
1397 static int
1398 parse_int(int *opt, const char *arg, int min, int max)
1399 {
1400 int value = atoi(arg);
1402 if (min <= value && value <= max) {
1403 *opt = value;
1404 return OK;
1405 }
1407 config_msg = "Integer value out of bound";
1408 return ERR;
1409 }
1411 static bool
1412 set_color(int *color, const char *name)
1413 {
1414 if (map_enum(color, color_map, name))
1415 return TRUE;
1416 if (!prefixcmp(name, "color"))
1417 return parse_int(color, name + 5, 0, 255) == OK;
1418 return FALSE;
1419 }
1421 /* Wants: object fgcolor bgcolor [attribute] */
1422 static int
1423 option_color_command(int argc, const char *argv[])
1424 {
1425 struct line_info *info;
1427 if (argc != 3 && argc != 4) {
1428 config_msg = "Wrong number of arguments given to color command";
1429 return ERR;
1430 }
1432 info = get_line_info(argv[0]);
1433 if (!info) {
1434 static struct enum_map obsolete[] = {
1435 ENUM_MAP("main-delim", LINE_DELIMITER),
1436 ENUM_MAP("main-date", LINE_DATE),
1437 ENUM_MAP("main-author", LINE_AUTHOR),
1438 };
1439 int index;
1441 if (!map_enum(&index, obsolete, argv[0])) {
1442 config_msg = "Unknown color name";
1443 return ERR;
1444 }
1445 info = &line_info[index];
1446 }
1448 if (!set_color(&info->fg, argv[1]) ||
1449 !set_color(&info->bg, argv[2])) {
1450 config_msg = "Unknown color";
1451 return ERR;
1452 }
1454 if (argc == 4 && !set_attribute(&info->attr, argv[3])) {
1455 config_msg = "Unknown attribute";
1456 return ERR;
1457 }
1459 return OK;
1460 }
1462 static int parse_bool(bool *opt, const char *arg)
1463 {
1464 *opt = (!strcmp(arg, "1") || !strcmp(arg, "true") || !strcmp(arg, "yes"))
1465 ? TRUE : FALSE;
1466 return OK;
1467 }
1469 static int
1470 parse_string(char *opt, const char *arg, size_t optsize)
1471 {
1472 int arglen = strlen(arg);
1474 switch (arg[0]) {
1475 case '\"':
1476 case '\'':
1477 if (arglen == 1 || arg[arglen - 1] != arg[0]) {
1478 config_msg = "Unmatched quotation";
1479 return ERR;
1480 }
1481 arg += 1; arglen -= 2;
1482 default:
1483 string_ncopy_do(opt, optsize, arg, strlen(arg));
1484 return OK;
1485 }
1486 }
1488 /* Wants: name = value */
1489 static int
1490 option_set_command(int argc, const char *argv[])
1491 {
1492 if (argc != 3) {
1493 config_msg = "Wrong number of arguments given to set command";
1494 return ERR;
1495 }
1497 if (strcmp(argv[1], "=")) {
1498 config_msg = "No value assigned";
1499 return ERR;
1500 }
1502 if (!strcmp(argv[0], "show-author"))
1503 return parse_bool(&opt_author, argv[2]);
1505 if (!strcmp(argv[0], "show-date"))
1506 return parse_bool(&opt_date, argv[2]);
1508 if (!strcmp(argv[0], "show-rev-graph"))
1509 return parse_bool(&opt_rev_graph, argv[2]);
1511 if (!strcmp(argv[0], "show-refs"))
1512 return parse_bool(&opt_show_refs, argv[2]);
1514 if (!strcmp(argv[0], "show-line-numbers"))
1515 return parse_bool(&opt_line_number, argv[2]);
1517 if (!strcmp(argv[0], "line-graphics"))
1518 return parse_bool(&opt_line_graphics, argv[2]);
1520 if (!strcmp(argv[0], "line-number-interval"))
1521 return parse_int(&opt_num_interval, argv[2], 1, 1024);
1523 if (!strcmp(argv[0], "author-width"))
1524 return parse_int(&opt_author_cols, argv[2], 0, 1024);
1526 if (!strcmp(argv[0], "tab-size"))
1527 return parse_int(&opt_tab_size, argv[2], 1, 1024);
1529 if (!strcmp(argv[0], "commit-encoding"))
1530 return parse_string(opt_encoding, argv[2], sizeof(opt_encoding));
1532 config_msg = "Unknown variable name";
1533 return ERR;
1534 }
1536 /* Wants: mode request key */
1537 static int
1538 option_bind_command(int argc, const char *argv[])
1539 {
1540 enum request request;
1541 int keymap;
1542 int key;
1544 if (argc < 3) {
1545 config_msg = "Wrong number of arguments given to bind command";
1546 return ERR;
1547 }
1549 if (set_keymap(&keymap, argv[0]) == ERR) {
1550 config_msg = "Unknown key map";
1551 return ERR;
1552 }
1554 key = get_key_value(argv[1]);
1555 if (key == ERR) {
1556 config_msg = "Unknown key";
1557 return ERR;
1558 }
1560 request = get_request(argv[2]);
1561 if (request == REQ_NONE) {
1562 static struct enum_map obsolete[] = {
1563 ENUM_MAP("cherry-pick", REQ_NONE),
1564 ENUM_MAP("screen-resize", REQ_NONE),
1565 ENUM_MAP("tree-parent", REQ_PARENT),
1566 };
1567 int alias;
1569 if (map_enum(&alias, obsolete, argv[2])) {
1570 if (alias != REQ_NONE)
1571 add_keybinding(keymap, alias, key);
1572 config_msg = "Obsolete request name";
1573 return ERR;
1574 }
1575 }
1576 if (request == REQ_NONE && *argv[2]++ == '!')
1577 request = add_run_request(keymap, key, argc - 2, argv + 2);
1578 if (request == REQ_NONE) {
1579 config_msg = "Unknown request name";
1580 return ERR;
1581 }
1583 add_keybinding(keymap, request, key);
1585 return OK;
1586 }
1588 static int
1589 set_option(const char *opt, char *value)
1590 {
1591 const char *argv[SIZEOF_ARG];
1592 int argc = 0;
1594 if (!argv_from_string(argv, &argc, value)) {
1595 config_msg = "Too many option arguments";
1596 return ERR;
1597 }
1599 if (!strcmp(opt, "color"))
1600 return option_color_command(argc, argv);
1602 if (!strcmp(opt, "set"))
1603 return option_set_command(argc, argv);
1605 if (!strcmp(opt, "bind"))
1606 return option_bind_command(argc, argv);
1608 config_msg = "Unknown option command";
1609 return ERR;
1610 }
1612 static int
1613 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1614 {
1615 int status = OK;
1617 config_lineno++;
1618 config_msg = "Internal error";
1620 /* Check for comment markers, since read_properties() will
1621 * only ensure opt and value are split at first " \t". */
1622 optlen = strcspn(opt, "#");
1623 if (optlen == 0)
1624 return OK;
1626 if (opt[optlen] != 0) {
1627 config_msg = "No option value";
1628 status = ERR;
1630 } else {
1631 /* Look for comment endings in the value. */
1632 size_t len = strcspn(value, "#");
1634 if (len < valuelen) {
1635 valuelen = len;
1636 value[valuelen] = 0;
1637 }
1639 status = set_option(opt, value);
1640 }
1642 if (status == ERR) {
1643 warn("Error on line %d, near '%.*s': %s",
1644 config_lineno, (int) optlen, opt, config_msg);
1645 config_errors = TRUE;
1646 }
1648 /* Always keep going if errors are encountered. */
1649 return OK;
1650 }
1652 static void
1653 load_option_file(const char *path)
1654 {
1655 struct io io = {};
1657 /* It's OK that the file doesn't exist. */
1658 if (!io_open(&io, path))
1659 return;
1661 config_lineno = 0;
1662 config_errors = FALSE;
1664 if (io_load(&io, " \t", read_option) == ERR ||
1665 config_errors == TRUE)
1666 warn("Errors while loading %s.", path);
1667 }
1669 static int
1670 load_options(void)
1671 {
1672 const char *home = getenv("HOME");
1673 const char *tigrc_user = getenv("TIGRC_USER");
1674 const char *tigrc_system = getenv("TIGRC_SYSTEM");
1675 char buf[SIZEOF_STR];
1677 add_builtin_run_requests();
1679 if (!tigrc_system)
1680 tigrc_system = SYSCONFDIR "/tigrc";
1681 load_option_file(tigrc_system);
1683 if (!tigrc_user) {
1684 if (!home || !string_format(buf, "%s/.tigrc", home))
1685 return ERR;
1686 tigrc_user = buf;
1687 }
1688 load_option_file(tigrc_user);
1690 return OK;
1691 }
1694 /*
1695 * The viewer
1696 */
1698 struct view;
1699 struct view_ops;
1701 /* The display array of active views and the index of the current view. */
1702 static struct view *display[2];
1703 static unsigned int current_view;
1705 #define foreach_displayed_view(view, i) \
1706 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1708 #define displayed_views() (display[1] != NULL ? 2 : 1)
1710 /* Current head and commit ID */
1711 static char ref_blob[SIZEOF_REF] = "";
1712 static char ref_commit[SIZEOF_REF] = "HEAD";
1713 static char ref_head[SIZEOF_REF] = "HEAD";
1715 struct view {
1716 const char *name; /* View name */
1717 const char *cmd_env; /* Command line set via environment */
1718 const char *id; /* Points to either of ref_{head,commit,blob} */
1720 struct view_ops *ops; /* View operations */
1722 enum keymap keymap; /* What keymap does this view have */
1723 bool git_dir; /* Whether the view requires a git directory. */
1725 char ref[SIZEOF_REF]; /* Hovered commit reference */
1726 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1728 int height, width; /* The width and height of the main window */
1729 WINDOW *win; /* The main window */
1730 WINDOW *title; /* The title window living below the main window */
1732 /* Navigation */
1733 unsigned long offset; /* Offset of the window top */
1734 unsigned long yoffset; /* Offset from the window side. */
1735 unsigned long lineno; /* Current line number */
1736 unsigned long p_offset; /* Previous offset of the window top */
1737 unsigned long p_yoffset;/* Previous offset from the window side */
1738 unsigned long p_lineno; /* Previous current line number */
1739 bool p_restore; /* Should the previous position be restored. */
1741 /* Searching */
1742 char grep[SIZEOF_STR]; /* Search string */
1743 regex_t *regex; /* Pre-compiled regexp */
1745 /* If non-NULL, points to the view that opened this view. If this view
1746 * is closed tig will switch back to the parent view. */
1747 struct view *parent;
1749 /* Buffering */
1750 size_t lines; /* Total number of lines */
1751 struct line *line; /* Line index */
1752 size_t line_alloc; /* Total number of allocated lines */
1753 unsigned int digits; /* Number of digits in the lines member. */
1755 /* Drawing */
1756 struct line *curline; /* Line currently being drawn. */
1757 enum line_type curtype; /* Attribute currently used for drawing. */
1758 unsigned long col; /* Column when drawing. */
1759 bool has_scrolled; /* View was scrolled. */
1760 bool can_hscroll; /* View can be scrolled horizontally. */
1762 /* Loading */
1763 struct io io;
1764 struct io *pipe;
1765 time_t start_time;
1766 time_t update_secs;
1767 };
1769 struct view_ops {
1770 /* What type of content being displayed. Used in the title bar. */
1771 const char *type;
1772 /* Default command arguments. */
1773 const char **argv;
1774 /* Open and reads in all view content. */
1775 bool (*open)(struct view *view);
1776 /* Read one line; updates view->line. */
1777 bool (*read)(struct view *view, char *data);
1778 /* Draw one line; @lineno must be < view->height. */
1779 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1780 /* Depending on view handle a special requests. */
1781 enum request (*request)(struct view *view, enum request request, struct line *line);
1782 /* Search for regexp in a line. */
1783 bool (*grep)(struct view *view, struct line *line);
1784 /* Select line */
1785 void (*select)(struct view *view, struct line *line);
1786 };
1788 static struct view_ops blame_ops;
1789 static struct view_ops blob_ops;
1790 static struct view_ops diff_ops;
1791 static struct view_ops help_ops;
1792 static struct view_ops log_ops;
1793 static struct view_ops main_ops;
1794 static struct view_ops pager_ops;
1795 static struct view_ops stage_ops;
1796 static struct view_ops status_ops;
1797 static struct view_ops tree_ops;
1799 #define VIEW_STR(name, env, ref, ops, map, git) \
1800 { name, #env, ref, ops, map, git }
1802 #define VIEW_(id, name, ops, git, ref) \
1803 VIEW_STR(name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1806 static struct view views[] = {
1807 VIEW_(MAIN, "main", &main_ops, TRUE, ref_head),
1808 VIEW_(DIFF, "diff", &diff_ops, TRUE, ref_commit),
1809 VIEW_(LOG, "log", &log_ops, TRUE, ref_head),
1810 VIEW_(TREE, "tree", &tree_ops, TRUE, ref_commit),
1811 VIEW_(BLOB, "blob", &blob_ops, TRUE, ref_blob),
1812 VIEW_(BLAME, "blame", &blame_ops, TRUE, ref_commit),
1813 VIEW_(HELP, "help", &help_ops, FALSE, ""),
1814 VIEW_(PAGER, "pager", &pager_ops, FALSE, "stdin"),
1815 VIEW_(STATUS, "status", &status_ops, TRUE, ""),
1816 VIEW_(STAGE, "stage", &stage_ops, TRUE, ""),
1817 };
1819 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1820 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1822 #define foreach_view(view, i) \
1823 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1825 #define view_is_displayed(view) \
1826 (view == display[0] || view == display[1])
1829 enum line_graphic {
1830 LINE_GRAPHIC_VLINE
1831 };
1833 static int line_graphics[] = {
1834 /* LINE_GRAPHIC_VLINE: */ '|'
1835 };
1837 static inline void
1838 set_view_attr(struct view *view, enum line_type type)
1839 {
1840 if (!view->curline->selected && view->curtype != type) {
1841 wattrset(view->win, get_line_attr(type));
1842 wchgat(view->win, -1, 0, type, NULL);
1843 view->curtype = type;
1844 }
1845 }
1847 static int
1848 draw_chars(struct view *view, enum line_type type, const char *string,
1849 int max_len, bool use_tilde)
1850 {
1851 int len = 0;
1852 int col = 0;
1853 int trimmed = FALSE;
1854 size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1856 if (max_len <= 0)
1857 return 0;
1859 if (opt_utf8) {
1860 len = utf8_length(&string, skip, &col, max_len, &trimmed, use_tilde);
1861 } else {
1862 col = len = strlen(string);
1863 if (len > max_len) {
1864 if (use_tilde) {
1865 max_len -= 1;
1866 }
1867 col = len = max_len;
1868 trimmed = TRUE;
1869 }
1870 }
1872 set_view_attr(view, type);
1873 if (len > 0)
1874 waddnstr(view->win, string, len);
1875 if (trimmed && use_tilde) {
1876 set_view_attr(view, LINE_DELIMITER);
1877 waddch(view->win, '~');
1878 col++;
1879 }
1881 if (view->col + col >= view->width + view->yoffset)
1882 view->can_hscroll = TRUE;
1884 return col;
1885 }
1887 static int
1888 draw_space(struct view *view, enum line_type type, int max, int spaces)
1889 {
1890 static char space[] = " ";
1891 int col = 0;
1893 spaces = MIN(max, spaces);
1895 while (spaces > 0) {
1896 int len = MIN(spaces, sizeof(space) - 1);
1898 col += draw_chars(view, type, space, spaces, FALSE);
1899 spaces -= len;
1900 }
1902 return col;
1903 }
1905 static bool
1906 draw_lineno(struct view *view, unsigned int lineno)
1907 {
1908 size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1909 char number[10];
1910 int digits3 = view->digits < 3 ? 3 : view->digits;
1911 int max_number = MIN(digits3, STRING_SIZE(number));
1912 int max = view->width - view->col;
1913 int col;
1915 if (max < max_number)
1916 max_number = max;
1918 lineno += view->offset + 1;
1919 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1920 static char fmt[] = "%1ld";
1922 if (view->digits <= 9)
1923 fmt[1] = '0' + digits3;
1925 if (!string_format(number, fmt, lineno))
1926 number[0] = 0;
1927 col = draw_chars(view, LINE_LINE_NUMBER, number, max_number, TRUE);
1928 } else {
1929 col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
1930 }
1932 if (col < max && skip <= col) {
1933 set_view_attr(view, LINE_DEFAULT);
1934 waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
1935 }
1936 col++;
1938 view->col += col;
1939 if (col < max && skip <= col)
1940 col = draw_space(view, LINE_DEFAULT, max - col, 1);
1941 view->col++;
1943 return view->width + view->yoffset <= view->col;
1944 }
1946 static bool
1947 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1948 {
1949 view->col += draw_chars(view, type, string, view->width + view->yoffset - view->col, trim);
1950 return view->width - view->col <= 0;
1951 }
1953 static bool
1954 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1955 {
1956 size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1957 int max = view->width - view->col;
1958 int i;
1960 if (max < size)
1961 size = max;
1963 set_view_attr(view, type);
1964 /* Using waddch() instead of waddnstr() ensures that
1965 * they'll be rendered correctly for the cursor line. */
1966 for (i = skip; i < size; i++)
1967 waddch(view->win, graphic[i]);
1969 view->col += size;
1970 if (size < max && skip <= size)
1971 waddch(view->win, ' ');
1972 view->col++;
1974 return view->width - view->col <= 0;
1975 }
1977 static bool
1978 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1979 {
1980 int max = MIN(view->width - view->col, len);
1981 int col;
1983 if (text)
1984 col = draw_chars(view, type, text, max - 1, trim);
1985 else
1986 col = draw_space(view, type, max - 1, max - 1);
1988 view->col += col;
1989 view->col += draw_space(view, LINE_DEFAULT, max - col, max - col);
1990 return view->width + view->yoffset <= view->col;
1991 }
1993 static bool
1994 draw_date(struct view *view, struct tm *time)
1995 {
1996 char buf[DATE_COLS];
1997 char *date;
1998 int timelen = 0;
2000 if (time)
2001 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
2002 date = timelen ? buf : NULL;
2004 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
2005 }
2007 static bool
2008 draw_author(struct view *view, const char *author)
2009 {
2010 bool trim = opt_author_cols == 0 || opt_author_cols > 5 || !author;
2012 if (!trim) {
2013 static char initials[10];
2014 size_t pos;
2016 #define is_initial_sep(c) (isspace(c) || ispunct(c) || (c) == '@')
2018 memset(initials, 0, sizeof(initials));
2019 for (pos = 0; *author && pos < opt_author_cols - 1; author++, pos++) {
2020 while (is_initial_sep(*author))
2021 author++;
2022 strncpy(&initials[pos], author, sizeof(initials) - 1 - pos);
2023 while (*author && !is_initial_sep(author[1]))
2024 author++;
2025 }
2027 author = initials;
2028 }
2030 return draw_field(view, LINE_AUTHOR, author, opt_author_cols, trim);
2031 }
2033 static bool
2034 draw_mode(struct view *view, mode_t mode)
2035 {
2036 static const char dir_mode[] = "drwxr-xr-x";
2037 static const char link_mode[] = "lrwxrwxrwx";
2038 static const char exe_mode[] = "-rwxr-xr-x";
2039 static const char file_mode[] = "-rw-r--r--";
2040 const char *str;
2042 if (S_ISDIR(mode))
2043 str = dir_mode;
2044 else if (S_ISLNK(mode))
2045 str = link_mode;
2046 else if (mode & S_IXUSR)
2047 str = exe_mode;
2048 else
2049 str = file_mode;
2051 return draw_field(view, LINE_MODE, str, sizeof(file_mode), FALSE);
2052 }
2054 static bool
2055 draw_view_line(struct view *view, unsigned int lineno)
2056 {
2057 struct line *line;
2058 bool selected = (view->offset + lineno == view->lineno);
2060 assert(view_is_displayed(view));
2062 if (view->offset + lineno >= view->lines)
2063 return FALSE;
2065 line = &view->line[view->offset + lineno];
2067 wmove(view->win, lineno, 0);
2068 if (line->cleareol)
2069 wclrtoeol(view->win);
2070 view->col = 0;
2071 view->curline = line;
2072 view->curtype = LINE_NONE;
2073 line->selected = FALSE;
2074 line->dirty = line->cleareol = 0;
2076 if (selected) {
2077 set_view_attr(view, LINE_CURSOR);
2078 line->selected = TRUE;
2079 view->ops->select(view, line);
2080 }
2082 return view->ops->draw(view, line, lineno);
2083 }
2085 static void
2086 redraw_view_dirty(struct view *view)
2087 {
2088 bool dirty = FALSE;
2089 int lineno;
2091 for (lineno = 0; lineno < view->height; lineno++) {
2092 if (view->offset + lineno >= view->lines)
2093 break;
2094 if (!view->line[view->offset + lineno].dirty)
2095 continue;
2096 dirty = TRUE;
2097 if (!draw_view_line(view, lineno))
2098 break;
2099 }
2101 if (!dirty)
2102 return;
2103 wnoutrefresh(view->win);
2104 }
2106 static void
2107 redraw_view_from(struct view *view, int lineno)
2108 {
2109 assert(0 <= lineno && lineno < view->height);
2111 if (lineno == 0)
2112 view->can_hscroll = FALSE;
2114 for (; lineno < view->height; lineno++) {
2115 if (!draw_view_line(view, lineno))
2116 break;
2117 }
2119 wnoutrefresh(view->win);
2120 }
2122 static void
2123 redraw_view(struct view *view)
2124 {
2125 werase(view->win);
2126 redraw_view_from(view, 0);
2127 }
2130 static void
2131 update_view_title(struct view *view)
2132 {
2133 char buf[SIZEOF_STR];
2134 char state[SIZEOF_STR];
2135 size_t bufpos = 0, statelen = 0;
2137 assert(view_is_displayed(view));
2139 if (view != VIEW(REQ_VIEW_STATUS) && view->lines) {
2140 unsigned int view_lines = view->offset + view->height;
2141 unsigned int lines = view->lines
2142 ? MIN(view_lines, view->lines) * 100 / view->lines
2143 : 0;
2145 string_format_from(state, &statelen, " - %s %d of %d (%d%%)",
2146 view->ops->type,
2147 view->lineno + 1,
2148 view->lines,
2149 lines);
2151 }
2153 if (view->pipe) {
2154 time_t secs = time(NULL) - view->start_time;
2156 /* Three git seconds are a long time ... */
2157 if (secs > 2)
2158 string_format_from(state, &statelen, " loading %lds", secs);
2159 }
2161 string_format_from(buf, &bufpos, "[%s]", view->name);
2162 if (*view->ref && bufpos < view->width) {
2163 size_t refsize = strlen(view->ref);
2164 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
2166 if (minsize < view->width)
2167 refsize = view->width - minsize + 7;
2168 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
2169 }
2171 if (statelen && bufpos < view->width) {
2172 string_format_from(buf, &bufpos, "%s", state);
2173 }
2175 if (view == display[current_view])
2176 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
2177 else
2178 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
2180 mvwaddnstr(view->title, 0, 0, buf, bufpos);
2181 wclrtoeol(view->title);
2182 wnoutrefresh(view->title);
2183 }
2185 static void
2186 resize_display(void)
2187 {
2188 int offset, i;
2189 struct view *base = display[0];
2190 struct view *view = display[1] ? display[1] : display[0];
2192 /* Setup window dimensions */
2194 getmaxyx(stdscr, base->height, base->width);
2196 /* Make room for the status window. */
2197 base->height -= 1;
2199 if (view != base) {
2200 /* Horizontal split. */
2201 view->width = base->width;
2202 view->height = SCALE_SPLIT_VIEW(base->height);
2203 base->height -= view->height;
2205 /* Make room for the title bar. */
2206 view->height -= 1;
2207 }
2209 /* Make room for the title bar. */
2210 base->height -= 1;
2212 offset = 0;
2214 foreach_displayed_view (view, i) {
2215 if (!view->win) {
2216 view->win = newwin(view->height, 0, offset, 0);
2217 if (!view->win)
2218 die("Failed to create %s view", view->name);
2220 scrollok(view->win, FALSE);
2222 view->title = newwin(1, 0, offset + view->height, 0);
2223 if (!view->title)
2224 die("Failed to create title window");
2226 } else {
2227 wresize(view->win, view->height, view->width);
2228 mvwin(view->win, offset, 0);
2229 mvwin(view->title, offset + view->height, 0);
2230 }
2232 offset += view->height + 1;
2233 }
2234 }
2236 static void
2237 redraw_display(bool clear)
2238 {
2239 struct view *view;
2240 int i;
2242 foreach_displayed_view (view, i) {
2243 if (clear)
2244 wclear(view->win);
2245 redraw_view(view);
2246 update_view_title(view);
2247 }
2248 }
2250 static void
2251 toggle_view_option(bool *option, const char *help)
2252 {
2253 *option = !*option;
2254 redraw_display(FALSE);
2255 report("%sabling %s", *option ? "En" : "Dis", help);
2256 }
2258 /*
2259 * Navigation
2260 */
2262 /* Scrolling backend */
2263 static void
2264 do_scroll_view(struct view *view, int lines)
2265 {
2266 bool redraw_current_line = FALSE;
2268 /* The rendering expects the new offset. */
2269 view->offset += lines;
2271 assert(0 <= view->offset && view->offset < view->lines);
2272 assert(lines);
2274 /* Move current line into the view. */
2275 if (view->lineno < view->offset) {
2276 view->lineno = view->offset;
2277 redraw_current_line = TRUE;
2278 } else if (view->lineno >= view->offset + view->height) {
2279 view->lineno = view->offset + view->height - 1;
2280 redraw_current_line = TRUE;
2281 }
2283 assert(view->offset <= view->lineno && view->lineno < view->lines);
2285 /* Redraw the whole screen if scrolling is pointless. */
2286 if (view->height < ABS(lines)) {
2287 redraw_view(view);
2289 } else {
2290 int line = lines > 0 ? view->height - lines : 0;
2291 int end = line + ABS(lines);
2293 scrollok(view->win, TRUE);
2294 wscrl(view->win, lines);
2295 scrollok(view->win, FALSE);
2297 while (line < end && draw_view_line(view, line))
2298 line++;
2300 if (redraw_current_line)
2301 draw_view_line(view, view->lineno - view->offset);
2302 wnoutrefresh(view->win);
2303 }
2305 view->has_scrolled = TRUE;
2306 report("");
2307 }
2309 /* Scroll frontend */
2310 static void
2311 scroll_view(struct view *view, enum request request)
2312 {
2313 int lines = 1;
2315 assert(view_is_displayed(view));
2317 switch (request) {
2318 case REQ_SCROLL_LEFT:
2319 if (view->yoffset == 0) {
2320 report("Cannot scroll beyond the first column");
2321 return;
2322 }
2323 if (view->yoffset <= SCROLL_INTERVAL)
2324 view->yoffset = 0;
2325 else
2326 view->yoffset -= SCROLL_INTERVAL;
2327 redraw_view_from(view, 0);
2328 report("");
2329 return;
2330 case REQ_SCROLL_RIGHT:
2331 if (!view->can_hscroll) {
2332 report("Cannot scroll beyond the last column");
2333 return;
2334 }
2335 view->yoffset += SCROLL_INTERVAL;
2336 redraw_view(view);
2337 report("");
2338 return;
2339 case REQ_SCROLL_PAGE_DOWN:
2340 lines = view->height;
2341 case REQ_SCROLL_LINE_DOWN:
2342 if (view->offset + lines > view->lines)
2343 lines = view->lines - view->offset;
2345 if (lines == 0 || view->offset + view->height >= view->lines) {
2346 report("Cannot scroll beyond the last line");
2347 return;
2348 }
2349 break;
2351 case REQ_SCROLL_PAGE_UP:
2352 lines = view->height;
2353 case REQ_SCROLL_LINE_UP:
2354 if (lines > view->offset)
2355 lines = view->offset;
2357 if (lines == 0) {
2358 report("Cannot scroll beyond the first line");
2359 return;
2360 }
2362 lines = -lines;
2363 break;
2365 default:
2366 die("request %d not handled in switch", request);
2367 }
2369 do_scroll_view(view, lines);
2370 }
2372 /* Cursor moving */
2373 static void
2374 move_view(struct view *view, enum request request)
2375 {
2376 int scroll_steps = 0;
2377 int steps;
2379 switch (request) {
2380 case REQ_MOVE_FIRST_LINE:
2381 steps = -view->lineno;
2382 break;
2384 case REQ_MOVE_LAST_LINE:
2385 steps = view->lines - view->lineno - 1;
2386 break;
2388 case REQ_MOVE_PAGE_UP:
2389 steps = view->height > view->lineno
2390 ? -view->lineno : -view->height;
2391 break;
2393 case REQ_MOVE_PAGE_DOWN:
2394 steps = view->lineno + view->height >= view->lines
2395 ? view->lines - view->lineno - 1 : view->height;
2396 break;
2398 case REQ_MOVE_UP:
2399 steps = -1;
2400 break;
2402 case REQ_MOVE_DOWN:
2403 steps = 1;
2404 break;
2406 default:
2407 die("request %d not handled in switch", request);
2408 }
2410 if (steps <= 0 && view->lineno == 0) {
2411 report("Cannot move beyond the first line");
2412 return;
2414 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2415 report("Cannot move beyond the last line");
2416 return;
2417 }
2419 /* Move the current line */
2420 view->lineno += steps;
2421 assert(0 <= view->lineno && view->lineno < view->lines);
2423 /* Check whether the view needs to be scrolled */
2424 if (view->lineno < view->offset ||
2425 view->lineno >= view->offset + view->height) {
2426 scroll_steps = steps;
2427 if (steps < 0 && -steps > view->offset) {
2428 scroll_steps = -view->offset;
2430 } else if (steps > 0) {
2431 if (view->lineno == view->lines - 1 &&
2432 view->lines > view->height) {
2433 scroll_steps = view->lines - view->offset - 1;
2434 if (scroll_steps >= view->height)
2435 scroll_steps -= view->height - 1;
2436 }
2437 }
2438 }
2440 if (!view_is_displayed(view)) {
2441 view->offset += scroll_steps;
2442 assert(0 <= view->offset && view->offset < view->lines);
2443 view->ops->select(view, &view->line[view->lineno]);
2444 return;
2445 }
2447 /* Repaint the old "current" line if we be scrolling */
2448 if (ABS(steps) < view->height)
2449 draw_view_line(view, view->lineno - steps - view->offset);
2451 if (scroll_steps) {
2452 do_scroll_view(view, scroll_steps);
2453 return;
2454 }
2456 /* Draw the current line */
2457 draw_view_line(view, view->lineno - view->offset);
2459 wnoutrefresh(view->win);
2460 report("");
2461 }
2464 /*
2465 * Searching
2466 */
2468 static void search_view(struct view *view, enum request request);
2470 static void
2471 select_view_line(struct view *view, unsigned long lineno)
2472 {
2473 if (lineno - view->offset >= view->height) {
2474 view->offset = lineno;
2475 view->lineno = lineno;
2476 if (view_is_displayed(view))
2477 redraw_view(view);
2479 } else {
2480 unsigned long old_lineno = view->lineno - view->offset;
2482 view->lineno = lineno;
2483 if (view_is_displayed(view)) {
2484 draw_view_line(view, old_lineno);
2485 draw_view_line(view, view->lineno - view->offset);
2486 wnoutrefresh(view->win);
2487 } else {
2488 view->ops->select(view, &view->line[view->lineno]);
2489 }
2490 }
2491 }
2493 static void
2494 find_next(struct view *view, enum request request)
2495 {
2496 unsigned long lineno = view->lineno;
2497 int direction;
2499 if (!*view->grep) {
2500 if (!*opt_search)
2501 report("No previous search");
2502 else
2503 search_view(view, request);
2504 return;
2505 }
2507 switch (request) {
2508 case REQ_SEARCH:
2509 case REQ_FIND_NEXT:
2510 direction = 1;
2511 break;
2513 case REQ_SEARCH_BACK:
2514 case REQ_FIND_PREV:
2515 direction = -1;
2516 break;
2518 default:
2519 return;
2520 }
2522 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2523 lineno += direction;
2525 /* Note, lineno is unsigned long so will wrap around in which case it
2526 * will become bigger than view->lines. */
2527 for (; lineno < view->lines; lineno += direction) {
2528 if (view->ops->grep(view, &view->line[lineno])) {
2529 select_view_line(view, lineno);
2530 report("Line %ld matches '%s'", lineno + 1, view->grep);
2531 return;
2532 }
2533 }
2535 report("No match found for '%s'", view->grep);
2536 }
2538 static void
2539 search_view(struct view *view, enum request request)
2540 {
2541 int regex_err;
2543 if (view->regex) {
2544 regfree(view->regex);
2545 *view->grep = 0;
2546 } else {
2547 view->regex = calloc(1, sizeof(*view->regex));
2548 if (!view->regex)
2549 return;
2550 }
2552 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2553 if (regex_err != 0) {
2554 char buf[SIZEOF_STR] = "unknown error";
2556 regerror(regex_err, view->regex, buf, sizeof(buf));
2557 report("Search failed: %s", buf);
2558 return;
2559 }
2561 string_copy(view->grep, opt_search);
2563 find_next(view, request);
2564 }
2566 /*
2567 * Incremental updating
2568 */
2570 static void
2571 reset_view(struct view *view)
2572 {
2573 int i;
2575 for (i = 0; i < view->lines; i++)
2576 free(view->line[i].data);
2577 free(view->line);
2579 view->p_offset = view->offset;
2580 view->p_yoffset = view->yoffset;
2581 view->p_lineno = view->lineno;
2583 view->line = NULL;
2584 view->offset = 0;
2585 view->yoffset = 0;
2586 view->lines = 0;
2587 view->lineno = 0;
2588 view->line_alloc = 0;
2589 view->vid[0] = 0;
2590 view->update_secs = 0;
2591 }
2593 static void
2594 free_argv(const char *argv[])
2595 {
2596 int argc;
2598 for (argc = 0; argv[argc]; argc++)
2599 free((void *) argv[argc]);
2600 }
2602 static bool
2603 format_argv(const char *dst_argv[], const char *src_argv[], enum format_flags flags)
2604 {
2605 char buf[SIZEOF_STR];
2606 int argc;
2607 bool noreplace = flags == FORMAT_NONE;
2609 free_argv(dst_argv);
2611 for (argc = 0; src_argv[argc]; argc++) {
2612 const char *arg = src_argv[argc];
2613 size_t bufpos = 0;
2615 while (arg) {
2616 char *next = strstr(arg, "%(");
2617 int len = next - arg;
2618 const char *value;
2620 if (!next || noreplace) {
2621 if (flags == FORMAT_DASH && !strcmp(arg, "--"))
2622 noreplace = TRUE;
2623 len = strlen(arg);
2624 value = "";
2626 } else if (!prefixcmp(next, "%(directory)")) {
2627 value = opt_path;
2629 } else if (!prefixcmp(next, "%(file)")) {
2630 value = opt_file;
2632 } else if (!prefixcmp(next, "%(ref)")) {
2633 value = *opt_ref ? opt_ref : "HEAD";
2635 } else if (!prefixcmp(next, "%(head)")) {
2636 value = ref_head;
2638 } else if (!prefixcmp(next, "%(commit)")) {
2639 value = ref_commit;
2641 } else if (!prefixcmp(next, "%(blob)")) {
2642 value = ref_blob;
2644 } else {
2645 report("Unknown replacement: `%s`", next);
2646 return FALSE;
2647 }
2649 if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2650 return FALSE;
2652 arg = next && !noreplace ? strchr(next, ')') + 1 : NULL;
2653 }
2655 dst_argv[argc] = strdup(buf);
2656 if (!dst_argv[argc])
2657 break;
2658 }
2660 dst_argv[argc] = NULL;
2662 return src_argv[argc] == NULL;
2663 }
2665 static bool
2666 restore_view_position(struct view *view)
2667 {
2668 if (!view->p_restore || (view->pipe && view->lines <= view->p_lineno))
2669 return FALSE;
2671 /* Changing the view position cancels the restoring. */
2672 /* FIXME: Changing back to the first line is not detected. */
2673 if (view->offset != 0 || view->lineno != 0) {
2674 view->p_restore = FALSE;
2675 return FALSE;
2676 }
2678 if (view->p_lineno >= view->lines)
2679 view->p_lineno = view->lines > 0 ? view->lines - 1 : 0;
2681 if (view->p_offset > view->p_lineno ||
2682 view->p_offset + view->height <= view->p_lineno) {
2683 unsigned long half = view->height / 2;
2685 if (view->p_lineno > half)
2686 view->p_offset = view->p_lineno - half;
2687 else
2688 view->p_offset = 0;
2689 }
2691 if (view_is_displayed(view) &&
2692 view->offset != view->p_offset &&
2693 view->lineno != view->p_lineno)
2694 werase(view->win);
2696 view->offset = view->p_offset;
2697 view->yoffset = view->p_yoffset;
2698 view->lineno = view->p_lineno;
2699 view->p_restore = FALSE;
2701 return TRUE;
2702 }
2704 static void
2705 end_update(struct view *view, bool force)
2706 {
2707 if (!view->pipe)
2708 return;
2709 while (!view->ops->read(view, NULL))
2710 if (!force)
2711 return;
2712 set_nonblocking_input(FALSE);
2713 if (force)
2714 kill_io(view->pipe);
2715 done_io(view->pipe);
2716 view->pipe = NULL;
2717 }
2719 static void
2720 setup_update(struct view *view, const char *vid)
2721 {
2722 set_nonblocking_input(TRUE);
2723 reset_view(view);
2724 string_copy_rev(view->vid, vid);
2725 view->pipe = &view->io;
2726 view->start_time = time(NULL);
2727 }
2729 static bool
2730 prepare_update(struct view *view, const char *argv[], const char *dir,
2731 enum format_flags flags)
2732 {
2733 if (view->pipe)
2734 end_update(view, TRUE);
2735 return init_io_rd(&view->io, argv, dir, flags);
2736 }
2738 static bool
2739 prepare_update_file(struct view *view, const char *name)
2740 {
2741 if (view->pipe)
2742 end_update(view, TRUE);
2743 return io_open(&view->io, name);
2744 }
2746 static bool
2747 begin_update(struct view *view, bool refresh)
2748 {
2749 if (view->pipe)
2750 end_update(view, TRUE);
2752 if (refresh) {
2753 if (!start_io(&view->io))
2754 return FALSE;
2756 } else {
2757 if (view == VIEW(REQ_VIEW_TREE) && strcmp(view->vid, view->id))
2758 opt_path[0] = 0;
2760 if (!run_io_rd(&view->io, view->ops->argv, FORMAT_ALL))
2761 return FALSE;
2763 /* Put the current ref_* value to the view title ref
2764 * member. This is needed by the blob view. Most other
2765 * views sets it automatically after loading because the
2766 * first line is a commit line. */
2767 string_copy_rev(view->ref, view->id);
2768 }
2770 setup_update(view, view->id);
2772 return TRUE;
2773 }
2775 #define ITEM_CHUNK_SIZE 256
2776 static void *
2777 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2778 {
2779 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2780 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2782 if (mem == NULL || num_chunks != num_chunks_new) {
2783 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2784 mem = realloc(mem, *size * item_size);
2785 }
2787 return mem;
2788 }
2790 static struct line *
2791 realloc_lines(struct view *view, size_t line_size)
2792 {
2793 size_t alloc = view->line_alloc;
2794 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2795 sizeof(*view->line));
2797 if (!tmp)
2798 return NULL;
2800 view->line = tmp;
2801 view->line_alloc = alloc;
2802 return view->line;
2803 }
2805 static bool
2806 update_view(struct view *view)
2807 {
2808 char out_buffer[BUFSIZ * 2];
2809 char *line;
2810 /* Clear the view and redraw everything since the tree sorting
2811 * might have rearranged things. */
2812 bool redraw = view->lines == 0;
2813 bool can_read = TRUE;
2815 if (!view->pipe)
2816 return TRUE;
2818 if (!io_can_read(view->pipe)) {
2819 if (view->lines == 0) {
2820 time_t secs = time(NULL) - view->start_time;
2822 if (secs > 1 && secs > view->update_secs) {
2823 if (view->update_secs == 0)
2824 redraw_view(view);
2825 update_view_title(view);
2826 view->update_secs = secs;
2827 }
2828 }
2829 return TRUE;
2830 }
2832 for (; (line = io_get(view->pipe, '\n', can_read)); can_read = FALSE) {
2833 if (opt_iconv != ICONV_NONE) {
2834 ICONV_CONST char *inbuf = line;
2835 size_t inlen = strlen(line) + 1;
2837 char *outbuf = out_buffer;
2838 size_t outlen = sizeof(out_buffer);
2840 size_t ret;
2842 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2843 if (ret != (size_t) -1)
2844 line = out_buffer;
2845 }
2847 if (!view->ops->read(view, line)) {
2848 report("Allocation failure");
2849 end_update(view, TRUE);
2850 return FALSE;
2851 }
2852 }
2854 {
2855 unsigned long lines = view->lines;
2856 int digits;
2858 for (digits = 0; lines; digits++)
2859 lines /= 10;
2861 /* Keep the displayed view in sync with line number scaling. */
2862 if (digits != view->digits) {
2863 view->digits = digits;
2864 if (opt_line_number || view == VIEW(REQ_VIEW_BLAME))
2865 redraw = TRUE;
2866 }
2867 }
2869 if (io_error(view->pipe)) {
2870 report("Failed to read: %s", io_strerror(view->pipe));
2871 end_update(view, TRUE);
2873 } else if (io_eof(view->pipe)) {
2874 report("");
2875 end_update(view, FALSE);
2876 }
2878 if (restore_view_position(view))
2879 redraw = TRUE;
2881 if (!view_is_displayed(view))
2882 return TRUE;
2884 if (redraw)
2885 redraw_view_from(view, 0);
2886 else
2887 redraw_view_dirty(view);
2889 /* Update the title _after_ the redraw so that if the redraw picks up a
2890 * commit reference in view->ref it'll be available here. */
2891 update_view_title(view);
2892 return TRUE;
2893 }
2895 static struct line *
2896 add_line_data(struct view *view, void *data, enum line_type type)
2897 {
2898 struct line *line;
2900 if (!realloc_lines(view, view->lines + 1))
2901 return NULL;
2903 line = &view->line[view->lines++];
2904 memset(line, 0, sizeof(*line));
2905 line->type = type;
2906 line->data = data;
2907 line->dirty = 1;
2909 return line;
2910 }
2912 static struct line *
2913 add_line_text(struct view *view, const char *text, enum line_type type)
2914 {
2915 char *data = text ? strdup(text) : NULL;
2917 return data ? add_line_data(view, data, type) : NULL;
2918 }
2920 static struct line *
2921 add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
2922 {
2923 char buf[SIZEOF_STR];
2924 va_list args;
2926 va_start(args, fmt);
2927 if (vsnprintf(buf, sizeof(buf), fmt, args) >= sizeof(buf))
2928 buf[0] = 0;
2929 va_end(args);
2931 return buf[0] ? add_line_text(view, buf, type) : NULL;
2932 }
2934 /*
2935 * View opening
2936 */
2938 enum open_flags {
2939 OPEN_DEFAULT = 0, /* Use default view switching. */
2940 OPEN_SPLIT = 1, /* Split current view. */
2941 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2942 OPEN_REFRESH = 16, /* Refresh view using previous command. */
2943 OPEN_PREPARED = 32, /* Open already prepared command. */
2944 };
2946 static void
2947 open_view(struct view *prev, enum request request, enum open_flags flags)
2948 {
2949 bool split = !!(flags & OPEN_SPLIT);
2950 bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
2951 bool nomaximize = !!(flags & OPEN_REFRESH);
2952 struct view *view = VIEW(request);
2953 int nviews = displayed_views();
2954 struct view *base_view = display[0];
2956 if (view == prev && nviews == 1 && !reload) {
2957 report("Already in %s view", view->name);
2958 return;
2959 }
2961 if (view->git_dir && !opt_git_dir[0]) {
2962 report("The %s view is disabled in pager view", view->name);
2963 return;
2964 }
2966 if (split) {
2967 display[1] = view;
2968 current_view = 1;
2969 } else if (!nomaximize) {
2970 /* Maximize the current view. */
2971 memset(display, 0, sizeof(display));
2972 current_view = 0;
2973 display[current_view] = view;
2974 }
2976 /* Resize the view when switching between split- and full-screen,
2977 * or when switching between two different full-screen views. */
2978 if (nviews != displayed_views() ||
2979 (nviews == 1 && base_view != display[0]))
2980 resize_display();
2982 if (view->ops->open) {
2983 if (view->pipe)
2984 end_update(view, TRUE);
2985 if (!view->ops->open(view)) {
2986 report("Failed to load %s view", view->name);
2987 return;
2988 }
2989 restore_view_position(view);
2991 } else if ((reload || strcmp(view->vid, view->id)) &&
2992 !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
2993 report("Failed to load %s view", view->name);
2994 return;
2995 }
2997 if (split && prev->lineno - prev->offset >= prev->height) {
2998 /* Take the title line into account. */
2999 int lines = prev->lineno - prev->offset - prev->height + 1;
3001 /* Scroll the view that was split if the current line is
3002 * outside the new limited view. */
3003 do_scroll_view(prev, lines);
3004 }
3006 if (prev && view != prev) {
3007 if (split) {
3008 /* "Blur" the previous view. */
3009 update_view_title(prev);
3010 }
3012 view->parent = prev;
3013 }
3015 if (view->pipe && view->lines == 0) {
3016 /* Clear the old view and let the incremental updating refill
3017 * the screen. */
3018 werase(view->win);
3019 view->p_restore = flags & (OPEN_RELOAD | OPEN_REFRESH);
3020 report("");
3021 } else if (view_is_displayed(view)) {
3022 redraw_view(view);
3023 report("");
3024 }
3025 }
3027 static void
3028 open_external_viewer(const char *argv[], const char *dir)
3029 {
3030 def_prog_mode(); /* save current tty modes */
3031 endwin(); /* restore original tty modes */
3032 run_io_fg(argv, dir);
3033 fprintf(stderr, "Press Enter to continue");
3034 getc(opt_tty);
3035 reset_prog_mode();
3036 redraw_display(TRUE);
3037 }
3039 static void
3040 open_mergetool(const char *file)
3041 {
3042 const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
3044 open_external_viewer(mergetool_argv, opt_cdup);
3045 }
3047 static void
3048 open_editor(bool from_root, const char *file)
3049 {
3050 const char *editor_argv[] = { "vi", file, NULL };
3051 const char *editor;
3053 editor = getenv("GIT_EDITOR");
3054 if (!editor && *opt_editor)
3055 editor = opt_editor;
3056 if (!editor)
3057 editor = getenv("VISUAL");
3058 if (!editor)
3059 editor = getenv("EDITOR");
3060 if (!editor)
3061 editor = "vi";
3063 editor_argv[0] = editor;
3064 open_external_viewer(editor_argv, from_root ? opt_cdup : NULL);
3065 }
3067 static void
3068 open_run_request(enum request request)
3069 {
3070 struct run_request *req = get_run_request(request);
3071 const char *argv[ARRAY_SIZE(req->argv)] = { NULL };
3073 if (!req) {
3074 report("Unknown run request");
3075 return;
3076 }
3078 if (format_argv(argv, req->argv, FORMAT_ALL))
3079 open_external_viewer(argv, NULL);
3080 free_argv(argv);
3081 }
3083 /*
3084 * User request switch noodle
3085 */
3087 static int
3088 view_driver(struct view *view, enum request request)
3089 {
3090 int i;
3092 if (request == REQ_NONE) {
3093 doupdate();
3094 return TRUE;
3095 }
3097 if (request > REQ_NONE) {
3098 open_run_request(request);
3099 /* FIXME: When all views can refresh always do this. */
3100 if (view == VIEW(REQ_VIEW_STATUS) ||
3101 view == VIEW(REQ_VIEW_MAIN) ||
3102 view == VIEW(REQ_VIEW_LOG) ||
3103 view == VIEW(REQ_VIEW_STAGE))
3104 request = REQ_REFRESH;
3105 else
3106 return TRUE;
3107 }
3109 if (view && view->lines) {
3110 request = view->ops->request(view, request, &view->line[view->lineno]);
3111 if (request == REQ_NONE)
3112 return TRUE;
3113 }
3115 switch (request) {
3116 case REQ_MOVE_UP:
3117 case REQ_MOVE_DOWN:
3118 case REQ_MOVE_PAGE_UP:
3119 case REQ_MOVE_PAGE_DOWN:
3120 case REQ_MOVE_FIRST_LINE:
3121 case REQ_MOVE_LAST_LINE:
3122 move_view(view, request);
3123 break;
3125 case REQ_SCROLL_LEFT:
3126 case REQ_SCROLL_RIGHT:
3127 case REQ_SCROLL_LINE_DOWN:
3128 case REQ_SCROLL_LINE_UP:
3129 case REQ_SCROLL_PAGE_DOWN:
3130 case REQ_SCROLL_PAGE_UP:
3131 scroll_view(view, request);
3132 break;
3134 case REQ_VIEW_BLAME:
3135 if (!opt_file[0]) {
3136 report("No file chosen, press %s to open tree view",
3137 get_key(REQ_VIEW_TREE));
3138 break;
3139 }
3140 open_view(view, request, OPEN_DEFAULT);
3141 break;
3143 case REQ_VIEW_BLOB:
3144 if (!ref_blob[0]) {
3145 report("No file chosen, press %s to open tree view",
3146 get_key(REQ_VIEW_TREE));
3147 break;
3148 }
3149 open_view(view, request, OPEN_DEFAULT);
3150 break;
3152 case REQ_VIEW_PAGER:
3153 if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
3154 report("No pager content, press %s to run command from prompt",
3155 get_key(REQ_PROMPT));
3156 break;
3157 }
3158 open_view(view, request, OPEN_DEFAULT);
3159 break;
3161 case REQ_VIEW_STAGE:
3162 if (!VIEW(REQ_VIEW_STAGE)->lines) {
3163 report("No stage content, press %s to open the status view and choose file",
3164 get_key(REQ_VIEW_STATUS));
3165 break;
3166 }
3167 open_view(view, request, OPEN_DEFAULT);
3168 break;
3170 case REQ_VIEW_STATUS:
3171 if (opt_is_inside_work_tree == FALSE) {
3172 report("The status view requires a working tree");
3173 break;
3174 }
3175 open_view(view, request, OPEN_DEFAULT);
3176 break;
3178 case REQ_VIEW_MAIN:
3179 case REQ_VIEW_DIFF:
3180 case REQ_VIEW_LOG:
3181 case REQ_VIEW_TREE:
3182 case REQ_VIEW_HELP:
3183 open_view(view, request, OPEN_DEFAULT);
3184 break;
3186 case REQ_NEXT:
3187 case REQ_PREVIOUS:
3188 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
3190 if ((view == VIEW(REQ_VIEW_DIFF) &&
3191 view->parent == VIEW(REQ_VIEW_MAIN)) ||
3192 (view == VIEW(REQ_VIEW_DIFF) &&
3193 view->parent == VIEW(REQ_VIEW_BLAME)) ||
3194 (view == VIEW(REQ_VIEW_STAGE) &&
3195 view->parent == VIEW(REQ_VIEW_STATUS)) ||
3196 (view == VIEW(REQ_VIEW_BLOB) &&
3197 view->parent == VIEW(REQ_VIEW_TREE))) {
3198 int line;
3200 view = view->parent;
3201 line = view->lineno;
3202 move_view(view, request);
3203 if (view_is_displayed(view))
3204 update_view_title(view);
3205 if (line != view->lineno)
3206 view->ops->request(view, REQ_ENTER,
3207 &view->line[view->lineno]);
3209 } else {
3210 move_view(view, request);
3211 }
3212 break;
3214 case REQ_VIEW_NEXT:
3215 {
3216 int nviews = displayed_views();
3217 int next_view = (current_view + 1) % nviews;
3219 if (next_view == current_view) {
3220 report("Only one view is displayed");
3221 break;
3222 }
3224 current_view = next_view;
3225 /* Blur out the title of the previous view. */
3226 update_view_title(view);
3227 report("");
3228 break;
3229 }
3230 case REQ_REFRESH:
3231 report("Refreshing is not yet supported for the %s view", view->name);
3232 break;
3234 case REQ_MAXIMIZE:
3235 if (displayed_views() == 2)
3236 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
3237 break;
3239 case REQ_TOGGLE_LINENO:
3240 toggle_view_option(&opt_line_number, "line numbers");
3241 break;
3243 case REQ_TOGGLE_DATE:
3244 toggle_view_option(&opt_date, "date display");
3245 break;
3247 case REQ_TOGGLE_AUTHOR:
3248 toggle_view_option(&opt_author, "author display");
3249 break;
3251 case REQ_TOGGLE_REV_GRAPH:
3252 toggle_view_option(&opt_rev_graph, "revision graph display");
3253 break;
3255 case REQ_TOGGLE_REFS:
3256 toggle_view_option(&opt_show_refs, "reference display");
3257 break;
3259 case REQ_SEARCH:
3260 case REQ_SEARCH_BACK:
3261 search_view(view, request);
3262 break;
3264 case REQ_FIND_NEXT:
3265 case REQ_FIND_PREV:
3266 find_next(view, request);
3267 break;
3269 case REQ_STOP_LOADING:
3270 for (i = 0; i < ARRAY_SIZE(views); i++) {
3271 view = &views[i];
3272 if (view->pipe)
3273 report("Stopped loading the %s view", view->name),
3274 end_update(view, TRUE);
3275 }
3276 break;
3278 case REQ_SHOW_VERSION:
3279 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3280 return TRUE;
3282 case REQ_SCREEN_REDRAW:
3283 redraw_display(TRUE);
3284 break;
3286 case REQ_EDIT:
3287 report("Nothing to edit");
3288 break;
3290 case REQ_ENTER:
3291 report("Nothing to enter");
3292 break;
3294 case REQ_VIEW_CLOSE:
3295 /* XXX: Mark closed views by letting view->parent point to the
3296 * view itself. Parents to closed view should never be
3297 * followed. */
3298 if (view->parent &&
3299 view->parent->parent != view->parent) {
3300 memset(display, 0, sizeof(display));
3301 current_view = 0;
3302 display[current_view] = view->parent;
3303 view->parent = view;
3304 resize_display();
3305 redraw_display(FALSE);
3306 report("");
3307 break;
3308 }
3309 /* Fall-through */
3310 case REQ_QUIT:
3311 return FALSE;
3313 default:
3314 report("Unknown key, press 'h' for help");
3315 return TRUE;
3316 }
3318 return TRUE;
3319 }
3322 /*
3323 * View backend utilities
3324 */
3326 static void
3327 parse_timezone(time_t *time, const char *zone)
3328 {
3329 long tz;
3331 tz = ('0' - zone[1]) * 60 * 60 * 10;
3332 tz += ('0' - zone[2]) * 60 * 60;
3333 tz += ('0' - zone[3]) * 60;
3334 tz += ('0' - zone[4]);
3336 if (zone[0] == '-')
3337 tz = -tz;
3339 *time -= tz;
3340 }
3342 /* Parse author lines where the name may be empty:
3343 * author <email@address.tld> 1138474660 +0100
3344 */
3345 static void
3346 parse_author_line(char *ident, char *author, size_t authorsize, struct tm *tm)
3347 {
3348 char *nameend = strchr(ident, '<');
3349 char *emailend = strchr(ident, '>');
3351 if (nameend && emailend)
3352 *nameend = *emailend = 0;
3353 ident = chomp_string(ident);
3354 if (!*ident) {
3355 if (nameend)
3356 ident = chomp_string(nameend + 1);
3357 if (!*ident)
3358 ident = "Unknown";
3359 }
3361 string_ncopy_do(author, authorsize, ident, strlen(ident));
3363 /* Parse epoch and timezone */
3364 if (emailend && emailend[1] == ' ') {
3365 char *secs = emailend + 2;
3366 char *zone = strchr(secs, ' ');
3367 time_t time = (time_t) atol(secs);
3369 if (zone && strlen(zone) == STRING_SIZE(" +0700"))
3370 parse_timezone(&time, zone + 1);
3372 gmtime_r(&time, tm);
3373 }
3374 }
3376 static enum input_status
3377 select_commit_parent_handler(void *data, char *buf, int c)
3378 {
3379 size_t parents = *(size_t *) data;
3380 int parent = 0;
3382 if (!isdigit(c))
3383 return INPUT_SKIP;
3385 if (*buf)
3386 parent = atoi(buf) * 10;
3387 parent += c - '0';
3389 if (parent > parents)
3390 return INPUT_SKIP;
3391 return INPUT_OK;
3392 }
3394 static bool
3395 select_commit_parent(const char *id, char rev[SIZEOF_REV])
3396 {
3397 char buf[SIZEOF_STR * 4];
3398 const char *revlist_argv[] = {
3399 "git", "rev-list", "-1", "--parents", id, NULL
3400 };
3401 int parents;
3403 if (!run_io_buf(revlist_argv, buf, sizeof(buf)) ||
3404 !*chomp_string(buf) ||
3405 (parents = (strlen(buf) / 40) - 1) < 0) {
3406 report("Failed to get parent information");
3407 return FALSE;
3409 } else if (parents == 0) {
3410 report("The selected commit has no parents");
3411 return FALSE;
3412 }
3414 if (parents > 1) {
3415 char prompt[SIZEOF_STR];
3416 char *result;
3418 if (!string_format(prompt, "Which parent? [1..%d] ", parents))
3419 return FALSE;
3420 result = prompt_input(prompt, select_commit_parent_handler, &parents);
3421 if (!result)
3422 return FALSE;
3423 parents = atoi(result);
3424 }
3426 string_copy_rev(rev, &buf[41 * parents]);
3427 return TRUE;
3428 }
3430 /*
3431 * Pager backend
3432 */
3434 static bool
3435 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3436 {
3437 char text[SIZEOF_STR];
3439 if (opt_line_number && draw_lineno(view, lineno))
3440 return TRUE;
3442 string_expand(text, sizeof(text), line->data, opt_tab_size);
3443 draw_text(view, line->type, text, TRUE);
3444 return TRUE;
3445 }
3447 static bool
3448 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3449 {
3450 const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3451 char refbuf[SIZEOF_STR];
3452 char *ref = NULL;
3454 if (run_io_buf(describe_argv, refbuf, sizeof(refbuf)))
3455 ref = chomp_string(refbuf);
3457 if (!ref || !*ref)
3458 return TRUE;
3460 /* This is the only fatal call, since it can "corrupt" the buffer. */
3461 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3462 return FALSE;
3464 return TRUE;
3465 }
3467 static void
3468 add_pager_refs(struct view *view, struct line *line)
3469 {
3470 char buf[SIZEOF_STR];
3471 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3472 struct ref **refs;
3473 size_t bufpos = 0, refpos = 0;
3474 const char *sep = "Refs: ";
3475 bool is_tag = FALSE;
3477 assert(line->type == LINE_COMMIT);
3479 refs = get_refs(commit_id);
3480 if (!refs) {
3481 if (view == VIEW(REQ_VIEW_DIFF))
3482 goto try_add_describe_ref;
3483 return;
3484 }
3486 do {
3487 struct ref *ref = refs[refpos];
3488 const char *fmt = ref->tag ? "%s[%s]" :
3489 ref->remote ? "%s<%s>" : "%s%s";
3491 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3492 return;
3493 sep = ", ";
3494 if (ref->tag)
3495 is_tag = TRUE;
3496 } while (refs[refpos++]->next);
3498 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
3499 try_add_describe_ref:
3500 /* Add <tag>-g<commit_id> "fake" reference. */
3501 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3502 return;
3503 }
3505 if (bufpos == 0)
3506 return;
3508 add_line_text(view, buf, LINE_PP_REFS);
3509 }
3511 static bool
3512 pager_read(struct view *view, char *data)
3513 {
3514 struct line *line;
3516 if (!data)
3517 return TRUE;
3519 line = add_line_text(view, data, get_line_type(data));
3520 if (!line)
3521 return FALSE;
3523 if (line->type == LINE_COMMIT &&
3524 (view == VIEW(REQ_VIEW_DIFF) ||
3525 view == VIEW(REQ_VIEW_LOG)))
3526 add_pager_refs(view, line);
3528 return TRUE;
3529 }
3531 static enum request
3532 pager_request(struct view *view, enum request request, struct line *line)
3533 {
3534 int split = 0;
3536 if (request != REQ_ENTER)
3537 return request;
3539 if (line->type == LINE_COMMIT &&
3540 (view == VIEW(REQ_VIEW_LOG) ||
3541 view == VIEW(REQ_VIEW_PAGER))) {
3542 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3543 split = 1;
3544 }
3546 /* Always scroll the view even if it was split. That way
3547 * you can use Enter to scroll through the log view and
3548 * split open each commit diff. */
3549 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3551 /* FIXME: A minor workaround. Scrolling the view will call report("")
3552 * but if we are scrolling a non-current view this won't properly
3553 * update the view title. */
3554 if (split)
3555 update_view_title(view);
3557 return REQ_NONE;
3558 }
3560 static bool
3561 pager_grep(struct view *view, struct line *line)
3562 {
3563 regmatch_t pmatch;
3564 char *text = line->data;
3566 if (!*text)
3567 return FALSE;
3569 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3570 return FALSE;
3572 return TRUE;
3573 }
3575 static void
3576 pager_select(struct view *view, struct line *line)
3577 {
3578 if (line->type == LINE_COMMIT) {
3579 char *text = (char *)line->data + STRING_SIZE("commit ");
3581 if (view != VIEW(REQ_VIEW_PAGER))
3582 string_copy_rev(view->ref, text);
3583 string_copy_rev(ref_commit, text);
3584 }
3585 }
3587 static struct view_ops pager_ops = {
3588 "line",
3589 NULL,
3590 NULL,
3591 pager_read,
3592 pager_draw,
3593 pager_request,
3594 pager_grep,
3595 pager_select,
3596 };
3598 static const char *log_argv[SIZEOF_ARG] = {
3599 "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3600 };
3602 static enum request
3603 log_request(struct view *view, enum request request, struct line *line)
3604 {
3605 switch (request) {
3606 case REQ_REFRESH:
3607 load_refs();
3608 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3609 return REQ_NONE;
3610 default:
3611 return pager_request(view, request, line);
3612 }
3613 }
3615 static struct view_ops log_ops = {
3616 "line",
3617 log_argv,
3618 NULL,
3619 pager_read,
3620 pager_draw,
3621 log_request,
3622 pager_grep,
3623 pager_select,
3624 };
3626 static const char *diff_argv[SIZEOF_ARG] = {
3627 "git", "show", "--pretty=fuller", "--no-color", "--root",
3628 "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
3629 };
3631 static struct view_ops diff_ops = {
3632 "line",
3633 diff_argv,
3634 NULL,
3635 pager_read,
3636 pager_draw,
3637 pager_request,
3638 pager_grep,
3639 pager_select,
3640 };
3642 /*
3643 * Help backend
3644 */
3646 static bool
3647 help_open(struct view *view)
3648 {
3649 char buf[SIZEOF_STR];
3650 size_t bufpos;
3651 int i;
3653 if (view->lines > 0)
3654 return TRUE;
3656 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3658 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3659 const char *key;
3661 if (req_info[i].request == REQ_NONE)
3662 continue;
3664 if (!req_info[i].request) {
3665 add_line_text(view, "", LINE_DEFAULT);
3666 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3667 continue;
3668 }
3670 key = get_key(req_info[i].request);
3671 if (!*key)
3672 key = "(no key defined)";
3674 for (bufpos = 0; bufpos <= req_info[i].namelen; bufpos++) {
3675 buf[bufpos] = tolower(req_info[i].name[bufpos]);
3676 if (buf[bufpos] == '_')
3677 buf[bufpos] = '-';
3678 }
3680 add_line_format(view, LINE_DEFAULT, " %-25s %-20s %s",
3681 key, buf, req_info[i].help);
3682 }
3684 if (run_requests) {
3685 add_line_text(view, "", LINE_DEFAULT);
3686 add_line_text(view, "External commands:", LINE_DEFAULT);
3687 }
3689 for (i = 0; i < run_requests; i++) {
3690 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3691 const char *key;
3692 int argc;
3694 if (!req)
3695 continue;
3697 key = get_key_name(req->key);
3698 if (!*key)
3699 key = "(no key defined)";
3701 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3702 if (!string_format_from(buf, &bufpos, "%s%s",
3703 argc ? " " : "", req->argv[argc]))
3704 return REQ_NONE;
3706 add_line_format(view, LINE_DEFAULT, " %-10s %-14s `%s`",
3707 keymap_table[req->keymap].name, key, buf);
3708 }
3710 return TRUE;
3711 }
3713 static struct view_ops help_ops = {
3714 "line",
3715 NULL,
3716 help_open,
3717 NULL,
3718 pager_draw,
3719 pager_request,
3720 pager_grep,
3721 pager_select,
3722 };
3725 /*
3726 * Tree backend
3727 */
3729 struct tree_stack_entry {
3730 struct tree_stack_entry *prev; /* Entry below this in the stack */
3731 unsigned long lineno; /* Line number to restore */
3732 char *name; /* Position of name in opt_path */
3733 };
3735 /* The top of the path stack. */
3736 static struct tree_stack_entry *tree_stack = NULL;
3737 unsigned long tree_lineno = 0;
3739 static void
3740 pop_tree_stack_entry(void)
3741 {
3742 struct tree_stack_entry *entry = tree_stack;
3744 tree_lineno = entry->lineno;
3745 entry->name[0] = 0;
3746 tree_stack = entry->prev;
3747 free(entry);
3748 }
3750 static void
3751 push_tree_stack_entry(const char *name, unsigned long lineno)
3752 {
3753 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3754 size_t pathlen = strlen(opt_path);
3756 if (!entry)
3757 return;
3759 entry->prev = tree_stack;
3760 entry->name = opt_path + pathlen;
3761 tree_stack = entry;
3763 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3764 pop_tree_stack_entry();
3765 return;
3766 }
3768 /* Move the current line to the first tree entry. */
3769 tree_lineno = 1;
3770 entry->lineno = lineno;
3771 }
3773 /* Parse output from git-ls-tree(1):
3774 *
3775 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3776 */
3778 #define SIZEOF_TREE_ATTR \
3779 STRING_SIZE("100644 blob f931e1d229c3e185caad4449bf5b66ed72462657\t")
3781 #define SIZEOF_TREE_MODE \
3782 STRING_SIZE("100644 ")
3784 #define TREE_ID_OFFSET \
3785 STRING_SIZE("100644 blob ")
3787 struct tree_entry {
3788 char id[SIZEOF_REV];
3789 mode_t mode;
3790 struct tm time; /* Date from the author ident. */
3791 char author[75]; /* Author of the commit. */
3792 char name[1];
3793 };
3795 static const char *
3796 tree_path(struct line *line)
3797 {
3798 return ((struct tree_entry *) line->data)->name;
3799 }
3802 static int
3803 tree_compare_entry(struct line *line1, struct line *line2)
3804 {
3805 if (line1->type != line2->type)
3806 return line1->type == LINE_TREE_DIR ? -1 : 1;
3807 return strcmp(tree_path(line1), tree_path(line2));
3808 }
3810 static struct line *
3811 tree_entry(struct view *view, enum line_type type, const char *path,
3812 const char *mode, const char *id)
3813 {
3814 struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
3815 struct line *line = entry ? add_line_data(view, entry, type) : NULL;
3817 if (!entry || !line) {
3818 free(entry);
3819 return NULL;
3820 }
3822 strncpy(entry->name, path, strlen(path));
3823 if (mode)
3824 entry->mode = strtoul(mode, NULL, 8);
3825 if (id)
3826 string_copy_rev(entry->id, id);
3828 return line;
3829 }
3831 static bool
3832 tree_read_date(struct view *view, char *text, bool *read_date)
3833 {
3834 static char author_name[SIZEOF_STR];
3835 static struct tm author_time;
3837 if (!text && *read_date) {
3838 *read_date = FALSE;
3839 return TRUE;
3841 } else if (!text) {
3842 char *path = *opt_path ? opt_path : ".";
3843 /* Find next entry to process */
3844 const char *log_file[] = {
3845 "git", "log", "--no-color", "--pretty=raw",
3846 "--cc", "--raw", view->id, "--", path, NULL
3847 };
3848 struct io io = {};
3850 if (!view->lines) {
3851 tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL);
3852 report("Tree is empty");
3853 return TRUE;
3854 }
3856 if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
3857 report("Failed to load tree data");
3858 return TRUE;
3859 }
3861 done_io(view->pipe);
3862 view->io = io;
3863 *read_date = TRUE;
3864 return FALSE;
3866 } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
3867 parse_author_line(text + STRING_SIZE("author "),
3868 author_name, sizeof(author_name), &author_time);
3870 } else if (*text == ':') {
3871 char *pos;
3872 size_t annotated = 1;
3873 size_t i;
3875 pos = strchr(text, '\t');
3876 if (!pos)
3877 return TRUE;
3878 text = pos + 1;
3879 if (*opt_prefix && !strncmp(text, opt_prefix, strlen(opt_prefix)))
3880 text += strlen(opt_prefix);
3881 if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
3882 text += strlen(opt_path);
3883 pos = strchr(text, '/');
3884 if (pos)
3885 *pos = 0;
3887 for (i = 1; i < view->lines; i++) {
3888 struct line *line = &view->line[i];
3889 struct tree_entry *entry = line->data;
3891 annotated += !!*entry->author;
3892 if (*entry->author || strcmp(entry->name, text))
3893 continue;
3895 string_copy(entry->author, author_name);
3896 memcpy(&entry->time, &author_time, sizeof(entry->time));
3897 line->dirty = 1;
3898 break;
3899 }
3901 if (annotated == view->lines)
3902 kill_io(view->pipe);
3903 }
3904 return TRUE;
3905 }
3907 static bool
3908 tree_read(struct view *view, char *text)
3909 {
3910 static bool read_date = FALSE;
3911 struct tree_entry *data;
3912 struct line *entry, *line;
3913 enum line_type type;
3914 size_t textlen = text ? strlen(text) : 0;
3915 char *path = text + SIZEOF_TREE_ATTR;
3917 if (read_date || !text)
3918 return tree_read_date(view, text, &read_date);
3920 if (textlen <= SIZEOF_TREE_ATTR)
3921 return FALSE;
3922 if (view->lines == 0 &&
3923 !tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL))
3924 return FALSE;
3926 /* Strip the path part ... */
3927 if (*opt_path) {
3928 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3929 size_t striplen = strlen(opt_path);
3931 if (pathlen > striplen)
3932 memmove(path, path + striplen,
3933 pathlen - striplen + 1);
3935 /* Insert "link" to parent directory. */
3936 if (view->lines == 1 &&
3937 !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
3938 return FALSE;
3939 }
3941 type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
3942 entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
3943 if (!entry)
3944 return FALSE;
3945 data = entry->data;
3947 /* Skip "Directory ..." and ".." line. */
3948 for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
3949 if (tree_compare_entry(line, entry) <= 0)
3950 continue;
3952 memmove(line + 1, line, (entry - line) * sizeof(*entry));
3954 line->data = data;
3955 line->type = type;
3956 for (; line <= entry; line++)
3957 line->dirty = line->cleareol = 1;
3958 return TRUE;
3959 }
3961 if (tree_lineno > view->lineno) {
3962 view->lineno = tree_lineno;
3963 tree_lineno = 0;
3964 }
3966 return TRUE;
3967 }
3969 static bool
3970 tree_draw(struct view *view, struct line *line, unsigned int lineno)
3971 {
3972 struct tree_entry *entry = line->data;
3974 if (line->type == LINE_TREE_HEAD) {
3975 if (draw_text(view, line->type, "Directory path /", TRUE))
3976 return TRUE;
3977 } else {
3978 if (draw_mode(view, entry->mode))
3979 return TRUE;
3981 if (opt_author && draw_author(view, entry->author))
3982 return TRUE;
3984 if (opt_date && draw_date(view, *entry->author ? &entry->time : NULL))
3985 return TRUE;
3986 }
3987 if (draw_text(view, line->type, entry->name, TRUE))
3988 return TRUE;
3989 return TRUE;
3990 }
3992 static void
3993 open_blob_editor()
3994 {
3995 char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
3996 int fd = mkstemp(file);
3998 if (fd == -1)
3999 report("Failed to create temporary file");
4000 else if (!run_io_append(blob_ops.argv, FORMAT_ALL, fd))
4001 report("Failed to save blob data to file");
4002 else
4003 open_editor(FALSE, file);
4004 if (fd != -1)
4005 unlink(file);
4006 }
4008 static enum request
4009 tree_request(struct view *view, enum request request, struct line *line)
4010 {
4011 enum open_flags flags;
4013 switch (request) {
4014 case REQ_VIEW_BLAME:
4015 if (line->type != LINE_TREE_FILE) {
4016 report("Blame only supported for files");
4017 return REQ_NONE;
4018 }
4020 string_copy(opt_ref, view->vid);
4021 return request;
4023 case REQ_EDIT:
4024 if (line->type != LINE_TREE_FILE) {
4025 report("Edit only supported for files");
4026 } else if (!is_head_commit(view->vid)) {
4027 open_blob_editor();
4028 } else {
4029 open_editor(TRUE, opt_file);
4030 }
4031 return REQ_NONE;
4033 case REQ_PARENT:
4034 if (!*opt_path) {
4035 /* quit view if at top of tree */
4036 return REQ_VIEW_CLOSE;
4037 }
4038 /* fake 'cd ..' */
4039 line = &view->line[1];
4040 break;
4042 case REQ_ENTER:
4043 break;
4045 default:
4046 return request;
4047 }
4049 /* Cleanup the stack if the tree view is at a different tree. */
4050 while (!*opt_path && tree_stack)
4051 pop_tree_stack_entry();
4053 switch (line->type) {
4054 case LINE_TREE_DIR:
4055 /* Depending on whether it is a subdirectory or parent link
4056 * mangle the path buffer. */
4057 if (line == &view->line[1] && *opt_path) {
4058 pop_tree_stack_entry();
4060 } else {
4061 const char *basename = tree_path(line);
4063 push_tree_stack_entry(basename, view->lineno);
4064 }
4066 /* Trees and subtrees share the same ID, so they are not not
4067 * unique like blobs. */
4068 flags = OPEN_RELOAD;
4069 request = REQ_VIEW_TREE;
4070 break;
4072 case LINE_TREE_FILE:
4073 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4074 request = REQ_VIEW_BLOB;
4075 break;
4077 default:
4078 return REQ_NONE;
4079 }
4081 open_view(view, request, flags);
4082 if (request == REQ_VIEW_TREE)
4083 view->lineno = tree_lineno;
4085 return REQ_NONE;
4086 }
4088 static void
4089 tree_select(struct view *view, struct line *line)
4090 {
4091 struct tree_entry *entry = line->data;
4093 if (line->type == LINE_TREE_FILE) {
4094 string_copy_rev(ref_blob, entry->id);
4095 string_format(opt_file, "%s%s", opt_path, tree_path(line));
4097 } else if (line->type != LINE_TREE_DIR) {
4098 return;
4099 }
4101 string_copy_rev(view->ref, entry->id);
4102 }
4104 static const char *tree_argv[SIZEOF_ARG] = {
4105 "git", "ls-tree", "%(commit)", "%(directory)", NULL
4106 };
4108 static struct view_ops tree_ops = {
4109 "file",
4110 tree_argv,
4111 NULL,
4112 tree_read,
4113 tree_draw,
4114 tree_request,
4115 pager_grep,
4116 tree_select,
4117 };
4119 static bool
4120 blob_read(struct view *view, char *line)
4121 {
4122 if (!line)
4123 return TRUE;
4124 return add_line_text(view, line, LINE_DEFAULT) != NULL;
4125 }
4127 static enum request
4128 blob_request(struct view *view, enum request request, struct line *line)
4129 {
4130 switch (request) {
4131 case REQ_EDIT:
4132 open_blob_editor();
4133 return REQ_NONE;
4134 default:
4135 return pager_request(view, request, line);
4136 }
4137 }
4139 static const char *blob_argv[SIZEOF_ARG] = {
4140 "git", "cat-file", "blob", "%(blob)", NULL
4141 };
4143 static struct view_ops blob_ops = {
4144 "line",
4145 blob_argv,
4146 NULL,
4147 blob_read,
4148 pager_draw,
4149 blob_request,
4150 pager_grep,
4151 pager_select,
4152 };
4154 /*
4155 * Blame backend
4156 *
4157 * Loading the blame view is a two phase job:
4158 *
4159 * 1. File content is read either using opt_file from the
4160 * filesystem or using git-cat-file.
4161 * 2. Then blame information is incrementally added by
4162 * reading output from git-blame.
4163 */
4165 static const char *blame_head_argv[] = {
4166 "git", "blame", "--incremental", "--", "%(file)", NULL
4167 };
4169 static const char *blame_ref_argv[] = {
4170 "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
4171 };
4173 static const char *blame_cat_file_argv[] = {
4174 "git", "cat-file", "blob", "%(ref):%(file)", NULL
4175 };
4177 struct blame_commit {
4178 char id[SIZEOF_REV]; /* SHA1 ID. */
4179 char title[128]; /* First line of the commit message. */
4180 char author[75]; /* Author of the commit. */
4181 struct tm time; /* Date from the author ident. */
4182 char filename[128]; /* Name of file. */
4183 bool has_previous; /* Was a "previous" line detected. */
4184 };
4186 struct blame {
4187 struct blame_commit *commit;
4188 char text[1];
4189 };
4191 static bool
4192 blame_open(struct view *view)
4193 {
4194 if (*opt_ref || !io_open(&view->io, opt_file)) {
4195 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
4196 return FALSE;
4197 }
4199 setup_update(view, opt_file);
4200 string_format(view->ref, "%s ...", opt_file);
4202 return TRUE;
4203 }
4205 static struct blame_commit *
4206 get_blame_commit(struct view *view, const char *id)
4207 {
4208 size_t i;
4210 for (i = 0; i < view->lines; i++) {
4211 struct blame *blame = view->line[i].data;
4213 if (!blame->commit)
4214 continue;
4216 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4217 return blame->commit;
4218 }
4220 {
4221 struct blame_commit *commit = calloc(1, sizeof(*commit));
4223 if (commit)
4224 string_ncopy(commit->id, id, SIZEOF_REV);
4225 return commit;
4226 }
4227 }
4229 static bool
4230 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4231 {
4232 const char *pos = *posref;
4234 *posref = NULL;
4235 pos = strchr(pos + 1, ' ');
4236 if (!pos || !isdigit(pos[1]))
4237 return FALSE;
4238 *number = atoi(pos + 1);
4239 if (*number < min || *number > max)
4240 return FALSE;
4242 *posref = pos;
4243 return TRUE;
4244 }
4246 static struct blame_commit *
4247 parse_blame_commit(struct view *view, const char *text, int *blamed)
4248 {
4249 struct blame_commit *commit;
4250 struct blame *blame;
4251 const char *pos = text + SIZEOF_REV - 1;
4252 size_t lineno;
4253 size_t group;
4255 if (strlen(text) <= SIZEOF_REV || *pos != ' ')
4256 return NULL;
4258 if (!parse_number(&pos, &lineno, 1, view->lines) ||
4259 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4260 return NULL;
4262 commit = get_blame_commit(view, text);
4263 if (!commit)
4264 return NULL;
4266 *blamed += group;
4267 while (group--) {
4268 struct line *line = &view->line[lineno + group - 1];
4270 blame = line->data;
4271 blame->commit = commit;
4272 line->dirty = 1;
4273 }
4275 return commit;
4276 }
4278 static bool
4279 blame_read_file(struct view *view, const char *line, bool *read_file)
4280 {
4281 if (!line) {
4282 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
4283 struct io io = {};
4285 if (view->lines == 0 && !view->parent)
4286 die("No blame exist for %s", view->vid);
4288 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
4289 report("Failed to load blame data");
4290 return TRUE;
4291 }
4293 done_io(view->pipe);
4294 view->io = io;
4295 *read_file = FALSE;
4296 return FALSE;
4298 } else {
4299 size_t linelen = string_expand_length(line, opt_tab_size);
4300 struct blame *blame = malloc(sizeof(*blame) + linelen);
4302 if (!blame)
4303 return FALSE;
4305 blame->commit = NULL;
4306 string_expand(blame->text, linelen + 1, line, opt_tab_size);
4307 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4308 }
4309 }
4311 static bool
4312 match_blame_header(const char *name, char **line)
4313 {
4314 size_t namelen = strlen(name);
4315 bool matched = !strncmp(name, *line, namelen);
4317 if (matched)
4318 *line += namelen;
4320 return matched;
4321 }
4323 static bool
4324 blame_read(struct view *view, char *line)
4325 {
4326 static struct blame_commit *commit = NULL;
4327 static int blamed = 0;
4328 static time_t author_time;
4329 static bool read_file = TRUE;
4331 if (read_file)
4332 return blame_read_file(view, line, &read_file);
4334 if (!line) {
4335 /* Reset all! */
4336 commit = NULL;
4337 blamed = 0;
4338 read_file = TRUE;
4339 string_format(view->ref, "%s", view->vid);
4340 if (view_is_displayed(view)) {
4341 update_view_title(view);
4342 redraw_view_from(view, 0);
4343 }
4344 return TRUE;
4345 }
4347 if (!commit) {
4348 commit = parse_blame_commit(view, line, &blamed);
4349 string_format(view->ref, "%s %2d%%", view->vid,
4350 view->lines ? blamed * 100 / view->lines : 0);
4352 } else if (match_blame_header("author ", &line)) {
4353 string_ncopy(commit->author, line, strlen(line));
4355 } else if (match_blame_header("author-time ", &line)) {
4356 author_time = (time_t) atol(line);
4358 } else if (match_blame_header("author-tz ", &line)) {
4359 parse_timezone(&author_time, line);
4360 gmtime_r(&author_time, &commit->time);
4362 } else if (match_blame_header("summary ", &line)) {
4363 string_ncopy(commit->title, line, strlen(line));
4365 } else if (match_blame_header("previous ", &line)) {
4366 commit->has_previous = TRUE;
4368 } else if (match_blame_header("filename ", &line)) {
4369 string_ncopy(commit->filename, line, strlen(line));
4370 commit = NULL;
4371 }
4373 return TRUE;
4374 }
4376 static bool
4377 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4378 {
4379 struct blame *blame = line->data;
4380 struct tm *time = NULL;
4381 const char *id = NULL, *author = NULL;
4383 if (blame->commit && *blame->commit->filename) {
4384 id = blame->commit->id;
4385 author = blame->commit->author;
4386 time = &blame->commit->time;
4387 }
4389 if (opt_date && draw_date(view, time))
4390 return TRUE;
4392 if (opt_author && draw_author(view, author))
4393 return TRUE;
4395 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4396 return TRUE;
4398 if (draw_lineno(view, lineno))
4399 return TRUE;
4401 draw_text(view, LINE_DEFAULT, blame->text, TRUE);
4402 return TRUE;
4403 }
4405 static bool
4406 check_blame_commit(struct blame *blame)
4407 {
4408 if (!blame->commit)
4409 report("Commit data not loaded yet");
4410 else if (!strcmp(blame->commit->id, NULL_ID))
4411 report("No commit exist for the selected line");
4412 else
4413 return TRUE;
4414 return FALSE;
4415 }
4417 static enum request
4418 blame_request(struct view *view, enum request request, struct line *line)
4419 {
4420 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4421 struct blame *blame = line->data;
4423 switch (request) {
4424 case REQ_VIEW_BLAME:
4425 if (check_blame_commit(blame)) {
4426 string_copy(opt_ref, blame->commit->id);
4427 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4428 }
4429 break;
4431 case REQ_PARENT:
4432 if (check_blame_commit(blame) &&
4433 select_commit_parent(blame->commit->id, opt_ref))
4434 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4435 break;
4437 case REQ_ENTER:
4438 if (!blame->commit) {
4439 report("No commit loaded yet");
4440 break;
4441 }
4443 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4444 !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4445 break;
4447 if (!strcmp(blame->commit->id, NULL_ID)) {
4448 struct view *diff = VIEW(REQ_VIEW_DIFF);
4449 const char *diff_index_argv[] = {
4450 "git", "diff-index", "--root", "--patch-with-stat",
4451 "-C", "-M", "HEAD", "--", view->vid, NULL
4452 };
4454 if (!blame->commit->has_previous) {
4455 diff_index_argv[1] = "diff";
4456 diff_index_argv[2] = "--no-color";
4457 diff_index_argv[6] = "--";
4458 diff_index_argv[7] = "/dev/null";
4459 }
4461 if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4462 report("Failed to allocate diff command");
4463 break;
4464 }
4465 flags |= OPEN_PREPARED;
4466 }
4468 open_view(view, REQ_VIEW_DIFF, flags);
4469 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4470 string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4471 break;
4473 default:
4474 return request;
4475 }
4477 return REQ_NONE;
4478 }
4480 static bool
4481 blame_grep(struct view *view, struct line *line)
4482 {
4483 struct blame *blame = line->data;
4484 struct blame_commit *commit = blame->commit;
4485 regmatch_t pmatch;
4487 #define MATCH(text, on) \
4488 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4490 if (commit) {
4491 char buf[DATE_COLS + 1];
4493 if (MATCH(commit->title, 1) ||
4494 MATCH(commit->author, opt_author) ||
4495 MATCH(commit->id, opt_date))
4496 return TRUE;
4498 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
4499 MATCH(buf, 1))
4500 return TRUE;
4501 }
4503 return MATCH(blame->text, 1);
4505 #undef MATCH
4506 }
4508 static void
4509 blame_select(struct view *view, struct line *line)
4510 {
4511 struct blame *blame = line->data;
4512 struct blame_commit *commit = blame->commit;
4514 if (!commit)
4515 return;
4517 if (!strcmp(commit->id, NULL_ID))
4518 string_ncopy(ref_commit, "HEAD", 4);
4519 else
4520 string_copy_rev(ref_commit, commit->id);
4521 }
4523 static struct view_ops blame_ops = {
4524 "line",
4525 NULL,
4526 blame_open,
4527 blame_read,
4528 blame_draw,
4529 blame_request,
4530 blame_grep,
4531 blame_select,
4532 };
4534 /*
4535 * Status backend
4536 */
4538 struct status {
4539 char status;
4540 struct {
4541 mode_t mode;
4542 char rev[SIZEOF_REV];
4543 char name[SIZEOF_STR];
4544 } old;
4545 struct {
4546 mode_t mode;
4547 char rev[SIZEOF_REV];
4548 char name[SIZEOF_STR];
4549 } new;
4550 };
4552 static char status_onbranch[SIZEOF_STR];
4553 static struct status stage_status;
4554 static enum line_type stage_line_type;
4555 static size_t stage_chunks;
4556 static int *stage_chunk;
4558 /* This should work even for the "On branch" line. */
4559 static inline bool
4560 status_has_none(struct view *view, struct line *line)
4561 {
4562 return line < view->line + view->lines && !line[1].data;
4563 }
4565 /* Get fields from the diff line:
4566 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4567 */
4568 static inline bool
4569 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4570 {
4571 const char *old_mode = buf + 1;
4572 const char *new_mode = buf + 8;
4573 const char *old_rev = buf + 15;
4574 const char *new_rev = buf + 56;
4575 const char *status = buf + 97;
4577 if (bufsize < 98 ||
4578 old_mode[-1] != ':' ||
4579 new_mode[-1] != ' ' ||
4580 old_rev[-1] != ' ' ||
4581 new_rev[-1] != ' ' ||
4582 status[-1] != ' ')
4583 return FALSE;
4585 file->status = *status;
4587 string_copy_rev(file->old.rev, old_rev);
4588 string_copy_rev(file->new.rev, new_rev);
4590 file->old.mode = strtoul(old_mode, NULL, 8);
4591 file->new.mode = strtoul(new_mode, NULL, 8);
4593 file->old.name[0] = file->new.name[0] = 0;
4595 return TRUE;
4596 }
4598 static bool
4599 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4600 {
4601 struct status *unmerged = NULL;
4602 char *buf;
4603 struct io io = {};
4605 if (!run_io(&io, argv, NULL, IO_RD))
4606 return FALSE;
4608 add_line_data(view, NULL, type);
4610 while ((buf = io_get(&io, 0, TRUE))) {
4611 struct status *file = unmerged;
4613 if (!file) {
4614 file = calloc(1, sizeof(*file));
4615 if (!file || !add_line_data(view, file, type))
4616 goto error_out;
4617 }
4619 /* Parse diff info part. */
4620 if (status) {
4621 file->status = status;
4622 if (status == 'A')
4623 string_copy(file->old.rev, NULL_ID);
4625 } else if (!file->status || file == unmerged) {
4626 if (!status_get_diff(file, buf, strlen(buf)))
4627 goto error_out;
4629 buf = io_get(&io, 0, TRUE);
4630 if (!buf)
4631 break;
4633 /* Collapse all modified entries that follow an
4634 * associated unmerged entry. */
4635 if (unmerged == file) {
4636 unmerged->status = 'U';
4637 unmerged = NULL;
4638 } else if (file->status == 'U') {
4639 unmerged = file;
4640 }
4641 }
4643 /* Grab the old name for rename/copy. */
4644 if (!*file->old.name &&
4645 (file->status == 'R' || file->status == 'C')) {
4646 string_ncopy(file->old.name, buf, strlen(buf));
4648 buf = io_get(&io, 0, TRUE);
4649 if (!buf)
4650 break;
4651 }
4653 /* git-ls-files just delivers a NUL separated list of
4654 * file names similar to the second half of the
4655 * git-diff-* output. */
4656 string_ncopy(file->new.name, buf, strlen(buf));
4657 if (!*file->old.name)
4658 string_copy(file->old.name, file->new.name);
4659 file = NULL;
4660 }
4662 if (io_error(&io)) {
4663 error_out:
4664 done_io(&io);
4665 return FALSE;
4666 }
4668 if (!view->line[view->lines - 1].data)
4669 add_line_data(view, NULL, LINE_STAT_NONE);
4671 done_io(&io);
4672 return TRUE;
4673 }
4675 /* Don't show unmerged entries in the staged section. */
4676 static const char *status_diff_index_argv[] = {
4677 "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4678 "--cached", "-M", "HEAD", NULL
4679 };
4681 static const char *status_diff_files_argv[] = {
4682 "git", "diff-files", "-z", NULL
4683 };
4685 static const char *status_list_other_argv[] = {
4686 "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
4687 };
4689 static const char *status_list_no_head_argv[] = {
4690 "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4691 };
4693 static const char *update_index_argv[] = {
4694 "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4695 };
4697 /* Restore the previous line number to stay in the context or select a
4698 * line with something that can be updated. */
4699 static void
4700 status_restore(struct view *view)
4701 {
4702 if (view->p_lineno >= view->lines)
4703 view->p_lineno = view->lines - 1;
4704 while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
4705 view->p_lineno++;
4706 while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
4707 view->p_lineno--;
4709 /* If the above fails, always skip the "On branch" line. */
4710 if (view->p_lineno < view->lines)
4711 view->lineno = view->p_lineno;
4712 else
4713 view->lineno = 1;
4715 if (view->lineno < view->offset)
4716 view->offset = view->lineno;
4717 else if (view->offset + view->height <= view->lineno)
4718 view->offset = view->lineno - view->height + 1;
4720 view->p_restore = FALSE;
4721 }
4723 static void
4724 status_update_onbranch(void)
4725 {
4726 static const char *paths[][2] = {
4727 { "rebase-apply/rebasing", "Rebasing" },
4728 { "rebase-apply/applying", "Applying mailbox" },
4729 { "rebase-apply/", "Rebasing mailbox" },
4730 { "rebase-merge/interactive", "Interactive rebase" },
4731 { "rebase-merge/", "Rebase merge" },
4732 { "MERGE_HEAD", "Merging" },
4733 { "BISECT_LOG", "Bisecting" },
4734 { "HEAD", "On branch" },
4735 };
4736 char buf[SIZEOF_STR];
4737 struct stat stat;
4738 int i;
4740 if (is_initial_commit()) {
4741 string_copy(status_onbranch, "Initial commit");
4742 return;
4743 }
4745 for (i = 0; i < ARRAY_SIZE(paths); i++) {
4746 char *head = opt_head;
4748 if (!string_format(buf, "%s/%s", opt_git_dir, paths[i][0]) ||
4749 lstat(buf, &stat) < 0)
4750 continue;
4752 if (!*opt_head) {
4753 struct io io = {};
4755 if (string_format(buf, "%s/rebase-merge/head-name", opt_git_dir) &&
4756 io_open(&io, buf) &&
4757 io_read_buf(&io, buf, sizeof(buf))) {
4758 head = chomp_string(buf);
4759 if (!prefixcmp(head, "refs/heads/"))
4760 head += STRING_SIZE("refs/heads/");
4761 }
4762 }
4764 if (!string_format(status_onbranch, "%s %s", paths[i][1], head))
4765 string_copy(status_onbranch, opt_head);
4766 return;
4767 }
4769 string_copy(status_onbranch, "Not currently on any branch");
4770 }
4772 /* First parse staged info using git-diff-index(1), then parse unstaged
4773 * info using git-diff-files(1), and finally untracked files using
4774 * git-ls-files(1). */
4775 static bool
4776 status_open(struct view *view)
4777 {
4778 reset_view(view);
4780 add_line_data(view, NULL, LINE_STAT_HEAD);
4781 status_update_onbranch();
4783 run_io_bg(update_index_argv);
4785 if (is_initial_commit()) {
4786 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4787 return FALSE;
4788 } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4789 return FALSE;
4790 }
4792 if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4793 !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4794 return FALSE;
4796 /* Restore the exact position or use the specialized restore
4797 * mode? */
4798 if (!view->p_restore)
4799 status_restore(view);
4800 return TRUE;
4801 }
4803 static bool
4804 status_draw(struct view *view, struct line *line, unsigned int lineno)
4805 {
4806 struct status *status = line->data;
4807 enum line_type type;
4808 const char *text;
4810 if (!status) {
4811 switch (line->type) {
4812 case LINE_STAT_STAGED:
4813 type = LINE_STAT_SECTION;
4814 text = "Changes to be committed:";
4815 break;
4817 case LINE_STAT_UNSTAGED:
4818 type = LINE_STAT_SECTION;
4819 text = "Changed but not updated:";
4820 break;
4822 case LINE_STAT_UNTRACKED:
4823 type = LINE_STAT_SECTION;
4824 text = "Untracked files:";
4825 break;
4827 case LINE_STAT_NONE:
4828 type = LINE_DEFAULT;
4829 text = " (no files)";
4830 break;
4832 case LINE_STAT_HEAD:
4833 type = LINE_STAT_HEAD;
4834 text = status_onbranch;
4835 break;
4837 default:
4838 return FALSE;
4839 }
4840 } else {
4841 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4843 buf[0] = status->status;
4844 if (draw_text(view, line->type, buf, TRUE))
4845 return TRUE;
4846 type = LINE_DEFAULT;
4847 text = status->new.name;
4848 }
4850 draw_text(view, type, text, TRUE);
4851 return TRUE;
4852 }
4854 static enum request
4855 status_enter(struct view *view, struct line *line)
4856 {
4857 struct status *status = line->data;
4858 const char *oldpath = status ? status->old.name : NULL;
4859 /* Diffs for unmerged entries are empty when passing the new
4860 * path, so leave it empty. */
4861 const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
4862 const char *info;
4863 enum open_flags split;
4864 struct view *stage = VIEW(REQ_VIEW_STAGE);
4866 if (line->type == LINE_STAT_NONE ||
4867 (!status && line[1].type == LINE_STAT_NONE)) {
4868 report("No file to diff");
4869 return REQ_NONE;
4870 }
4872 switch (line->type) {
4873 case LINE_STAT_STAGED:
4874 if (is_initial_commit()) {
4875 const char *no_head_diff_argv[] = {
4876 "git", "diff", "--no-color", "--patch-with-stat",
4877 "--", "/dev/null", newpath, NULL
4878 };
4880 if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
4881 return REQ_QUIT;
4882 } else {
4883 const char *index_show_argv[] = {
4884 "git", "diff-index", "--root", "--patch-with-stat",
4885 "-C", "-M", "--cached", "HEAD", "--",
4886 oldpath, newpath, NULL
4887 };
4889 if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
4890 return REQ_QUIT;
4891 }
4893 if (status)
4894 info = "Staged changes to %s";
4895 else
4896 info = "Staged changes";
4897 break;
4899 case LINE_STAT_UNSTAGED:
4900 {
4901 const char *files_show_argv[] = {
4902 "git", "diff-files", "--root", "--patch-with-stat",
4903 "-C", "-M", "--", oldpath, newpath, NULL
4904 };
4906 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
4907 return REQ_QUIT;
4908 if (status)
4909 info = "Unstaged changes to %s";
4910 else
4911 info = "Unstaged changes";
4912 break;
4913 }
4914 case LINE_STAT_UNTRACKED:
4915 if (!newpath) {
4916 report("No file to show");
4917 return REQ_NONE;
4918 }
4920 if (!suffixcmp(status->new.name, -1, "/")) {
4921 report("Cannot display a directory");
4922 return REQ_NONE;
4923 }
4925 if (!prepare_update_file(stage, newpath))
4926 return REQ_QUIT;
4927 info = "Untracked file %s";
4928 break;
4930 case LINE_STAT_HEAD:
4931 return REQ_NONE;
4933 default:
4934 die("line type %d not handled in switch", line->type);
4935 }
4937 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4938 open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
4939 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4940 if (status) {
4941 stage_status = *status;
4942 } else {
4943 memset(&stage_status, 0, sizeof(stage_status));
4944 }
4946 stage_line_type = line->type;
4947 stage_chunks = 0;
4948 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4949 }
4951 return REQ_NONE;
4952 }
4954 static bool
4955 status_exists(struct status *status, enum line_type type)
4956 {
4957 struct view *view = VIEW(REQ_VIEW_STATUS);
4958 unsigned long lineno;
4960 for (lineno = 0; lineno < view->lines; lineno++) {
4961 struct line *line = &view->line[lineno];
4962 struct status *pos = line->data;
4964 if (line->type != type)
4965 continue;
4966 if (!pos && (!status || !status->status) && line[1].data) {
4967 select_view_line(view, lineno);
4968 return TRUE;
4969 }
4970 if (pos && !strcmp(status->new.name, pos->new.name)) {
4971 select_view_line(view, lineno);
4972 return TRUE;
4973 }
4974 }
4976 return FALSE;
4977 }
4980 static bool
4981 status_update_prepare(struct io *io, enum line_type type)
4982 {
4983 const char *staged_argv[] = {
4984 "git", "update-index", "-z", "--index-info", NULL
4985 };
4986 const char *others_argv[] = {
4987 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
4988 };
4990 switch (type) {
4991 case LINE_STAT_STAGED:
4992 return run_io(io, staged_argv, opt_cdup, IO_WR);
4994 case LINE_STAT_UNSTAGED:
4995 return run_io(io, others_argv, opt_cdup, IO_WR);
4997 case LINE_STAT_UNTRACKED:
4998 return run_io(io, others_argv, NULL, IO_WR);
5000 default:
5001 die("line type %d not handled in switch", type);
5002 return FALSE;
5003 }
5004 }
5006 static bool
5007 status_update_write(struct io *io, struct status *status, enum line_type type)
5008 {
5009 char buf[SIZEOF_STR];
5010 size_t bufsize = 0;
5012 switch (type) {
5013 case LINE_STAT_STAGED:
5014 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
5015 status->old.mode,
5016 status->old.rev,
5017 status->old.name, 0))
5018 return FALSE;
5019 break;
5021 case LINE_STAT_UNSTAGED:
5022 case LINE_STAT_UNTRACKED:
5023 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
5024 return FALSE;
5025 break;
5027 default:
5028 die("line type %d not handled in switch", type);
5029 }
5031 return io_write(io, buf, bufsize);
5032 }
5034 static bool
5035 status_update_file(struct status *status, enum line_type type)
5036 {
5037 struct io io = {};
5038 bool result;
5040 if (!status_update_prepare(&io, type))
5041 return FALSE;
5043 result = status_update_write(&io, status, type);
5044 done_io(&io);
5045 return result;
5046 }
5048 static bool
5049 status_update_files(struct view *view, struct line *line)
5050 {
5051 struct io io = {};
5052 bool result = TRUE;
5053 struct line *pos = view->line + view->lines;
5054 int files = 0;
5055 int file, done;
5057 if (!status_update_prepare(&io, line->type))
5058 return FALSE;
5060 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
5061 files++;
5063 for (file = 0, done = 0; result && file < files; line++, file++) {
5064 int almost_done = file * 100 / files;
5066 if (almost_done > done) {
5067 done = almost_done;
5068 string_format(view->ref, "updating file %u of %u (%d%% done)",
5069 file, files, done);
5070 update_view_title(view);
5071 }
5072 result = status_update_write(&io, line->data, line->type);
5073 }
5075 done_io(&io);
5076 return result;
5077 }
5079 static bool
5080 status_update(struct view *view)
5081 {
5082 struct line *line = &view->line[view->lineno];
5084 assert(view->lines);
5086 if (!line->data) {
5087 /* This should work even for the "On branch" line. */
5088 if (line < view->line + view->lines && !line[1].data) {
5089 report("Nothing to update");
5090 return FALSE;
5091 }
5093 if (!status_update_files(view, line + 1)) {
5094 report("Failed to update file status");
5095 return FALSE;
5096 }
5098 } else if (!status_update_file(line->data, line->type)) {
5099 report("Failed to update file status");
5100 return FALSE;
5101 }
5103 return TRUE;
5104 }
5106 static bool
5107 status_revert(struct status *status, enum line_type type, bool has_none)
5108 {
5109 if (!status || type != LINE_STAT_UNSTAGED) {
5110 if (type == LINE_STAT_STAGED) {
5111 report("Cannot revert changes to staged files");
5112 } else if (type == LINE_STAT_UNTRACKED) {
5113 report("Cannot revert changes to untracked files");
5114 } else if (has_none) {
5115 report("Nothing to revert");
5116 } else {
5117 report("Cannot revert changes to multiple files");
5118 }
5119 return FALSE;
5121 } else {
5122 char mode[10] = "100644";
5123 const char *reset_argv[] = {
5124 "git", "update-index", "--cacheinfo", mode,
5125 status->old.rev, status->old.name, NULL
5126 };
5127 const char *checkout_argv[] = {
5128 "git", "checkout", "--", status->old.name, NULL
5129 };
5131 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
5132 return FALSE;
5133 string_format(mode, "%o", status->old.mode);
5134 return (status->status != 'U' || run_io_fg(reset_argv, opt_cdup)) &&
5135 run_io_fg(checkout_argv, opt_cdup);
5136 }
5137 }
5139 static enum request
5140 status_request(struct view *view, enum request request, struct line *line)
5141 {
5142 struct status *status = line->data;
5144 switch (request) {
5145 case REQ_STATUS_UPDATE:
5146 if (!status_update(view))
5147 return REQ_NONE;
5148 break;
5150 case REQ_STATUS_REVERT:
5151 if (!status_revert(status, line->type, status_has_none(view, line)))
5152 return REQ_NONE;
5153 break;
5155 case REQ_STATUS_MERGE:
5156 if (!status || status->status != 'U') {
5157 report("Merging only possible for files with unmerged status ('U').");
5158 return REQ_NONE;
5159 }
5160 open_mergetool(status->new.name);
5161 break;
5163 case REQ_EDIT:
5164 if (!status)
5165 return request;
5166 if (status->status == 'D') {
5167 report("File has been deleted.");
5168 return REQ_NONE;
5169 }
5171 open_editor(status->status != '?', status->new.name);
5172 break;
5174 case REQ_VIEW_BLAME:
5175 if (status) {
5176 string_copy(opt_file, status->new.name);
5177 opt_ref[0] = 0;
5178 }
5179 return request;
5181 case REQ_ENTER:
5182 /* After returning the status view has been split to
5183 * show the stage view. No further reloading is
5184 * necessary. */
5185 status_enter(view, line);
5186 return REQ_NONE;
5188 case REQ_REFRESH:
5189 /* Simply reload the view. */
5190 break;
5192 default:
5193 return request;
5194 }
5196 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5198 return REQ_NONE;
5199 }
5201 static void
5202 status_select(struct view *view, struct line *line)
5203 {
5204 struct status *status = line->data;
5205 char file[SIZEOF_STR] = "all files";
5206 const char *text;
5207 const char *key;
5209 if (status && !string_format(file, "'%s'", status->new.name))
5210 return;
5212 if (!status && line[1].type == LINE_STAT_NONE)
5213 line++;
5215 switch (line->type) {
5216 case LINE_STAT_STAGED:
5217 text = "Press %s to unstage %s for commit";
5218 break;
5220 case LINE_STAT_UNSTAGED:
5221 text = "Press %s to stage %s for commit";
5222 break;
5224 case LINE_STAT_UNTRACKED:
5225 text = "Press %s to stage %s for addition";
5226 break;
5228 case LINE_STAT_HEAD:
5229 case LINE_STAT_NONE:
5230 text = "Nothing to update";
5231 break;
5233 default:
5234 die("line type %d not handled in switch", line->type);
5235 }
5237 if (status && status->status == 'U') {
5238 text = "Press %s to resolve conflict in %s";
5239 key = get_key(REQ_STATUS_MERGE);
5241 } else {
5242 key = get_key(REQ_STATUS_UPDATE);
5243 }
5245 string_format(view->ref, text, key, file);
5246 }
5248 static bool
5249 status_grep(struct view *view, struct line *line)
5250 {
5251 struct status *status = line->data;
5252 enum { S_STATUS, S_NAME, S_END } state;
5253 char buf[2] = "?";
5254 regmatch_t pmatch;
5256 if (!status)
5257 return FALSE;
5259 for (state = S_STATUS; state < S_END; state++) {
5260 const char *text;
5262 switch (state) {
5263 case S_NAME: text = status->new.name; break;
5264 case S_STATUS:
5265 buf[0] = status->status;
5266 text = buf;
5267 break;
5269 default:
5270 return FALSE;
5271 }
5273 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5274 return TRUE;
5275 }
5277 return FALSE;
5278 }
5280 static struct view_ops status_ops = {
5281 "file",
5282 NULL,
5283 status_open,
5284 NULL,
5285 status_draw,
5286 status_request,
5287 status_grep,
5288 status_select,
5289 };
5292 static bool
5293 stage_diff_write(struct io *io, struct line *line, struct line *end)
5294 {
5295 while (line < end) {
5296 if (!io_write(io, line->data, strlen(line->data)) ||
5297 !io_write(io, "\n", 1))
5298 return FALSE;
5299 line++;
5300 if (line->type == LINE_DIFF_CHUNK ||
5301 line->type == LINE_DIFF_HEADER)
5302 break;
5303 }
5305 return TRUE;
5306 }
5308 static struct line *
5309 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5310 {
5311 for (; view->line < line; line--)
5312 if (line->type == type)
5313 return line;
5315 return NULL;
5316 }
5318 static bool
5319 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5320 {
5321 const char *apply_argv[SIZEOF_ARG] = {
5322 "git", "apply", "--whitespace=nowarn", NULL
5323 };
5324 struct line *diff_hdr;
5325 struct io io = {};
5326 int argc = 3;
5328 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5329 if (!diff_hdr)
5330 return FALSE;
5332 if (!revert)
5333 apply_argv[argc++] = "--cached";
5334 if (revert || stage_line_type == LINE_STAT_STAGED)
5335 apply_argv[argc++] = "-R";
5336 apply_argv[argc++] = "-";
5337 apply_argv[argc++] = NULL;
5338 if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
5339 return FALSE;
5341 if (!stage_diff_write(&io, diff_hdr, chunk) ||
5342 !stage_diff_write(&io, chunk, view->line + view->lines))
5343 chunk = NULL;
5345 done_io(&io);
5346 run_io_bg(update_index_argv);
5348 return chunk ? TRUE : FALSE;
5349 }
5351 static bool
5352 stage_update(struct view *view, struct line *line)
5353 {
5354 struct line *chunk = NULL;
5356 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5357 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5359 if (chunk) {
5360 if (!stage_apply_chunk(view, chunk, FALSE)) {
5361 report("Failed to apply chunk");
5362 return FALSE;
5363 }
5365 } else if (!stage_status.status) {
5366 view = VIEW(REQ_VIEW_STATUS);
5368 for (line = view->line; line < view->line + view->lines; line++)
5369 if (line->type == stage_line_type)
5370 break;
5372 if (!status_update_files(view, line + 1)) {
5373 report("Failed to update files");
5374 return FALSE;
5375 }
5377 } else if (!status_update_file(&stage_status, stage_line_type)) {
5378 report("Failed to update file");
5379 return FALSE;
5380 }
5382 return TRUE;
5383 }
5385 static bool
5386 stage_revert(struct view *view, struct line *line)
5387 {
5388 struct line *chunk = NULL;
5390 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5391 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5393 if (chunk) {
5394 if (!prompt_yesno("Are you sure you want to revert changes?"))
5395 return FALSE;
5397 if (!stage_apply_chunk(view, chunk, TRUE)) {
5398 report("Failed to revert chunk");
5399 return FALSE;
5400 }
5401 return TRUE;
5403 } else {
5404 return status_revert(stage_status.status ? &stage_status : NULL,
5405 stage_line_type, FALSE);
5406 }
5407 }
5410 static void
5411 stage_next(struct view *view, struct line *line)
5412 {
5413 int i;
5415 if (!stage_chunks) {
5416 static size_t alloc = 0;
5417 int *tmp;
5419 for (line = view->line; line < view->line + view->lines; line++) {
5420 if (line->type != LINE_DIFF_CHUNK)
5421 continue;
5423 tmp = realloc_items(stage_chunk, &alloc,
5424 stage_chunks, sizeof(*tmp));
5425 if (!tmp) {
5426 report("Allocation failure");
5427 return;
5428 }
5430 stage_chunk = tmp;
5431 stage_chunk[stage_chunks++] = line - view->line;
5432 }
5433 }
5435 for (i = 0; i < stage_chunks; i++) {
5436 if (stage_chunk[i] > view->lineno) {
5437 do_scroll_view(view, stage_chunk[i] - view->lineno);
5438 report("Chunk %d of %d", i + 1, stage_chunks);
5439 return;
5440 }
5441 }
5443 report("No next chunk found");
5444 }
5446 static enum request
5447 stage_request(struct view *view, enum request request, struct line *line)
5448 {
5449 switch (request) {
5450 case REQ_STATUS_UPDATE:
5451 if (!stage_update(view, line))
5452 return REQ_NONE;
5453 break;
5455 case REQ_STATUS_REVERT:
5456 if (!stage_revert(view, line))
5457 return REQ_NONE;
5458 break;
5460 case REQ_STAGE_NEXT:
5461 if (stage_line_type == LINE_STAT_UNTRACKED) {
5462 report("File is untracked; press %s to add",
5463 get_key(REQ_STATUS_UPDATE));
5464 return REQ_NONE;
5465 }
5466 stage_next(view, line);
5467 return REQ_NONE;
5469 case REQ_EDIT:
5470 if (!stage_status.new.name[0])
5471 return request;
5472 if (stage_status.status == 'D') {
5473 report("File has been deleted.");
5474 return REQ_NONE;
5475 }
5477 open_editor(stage_status.status != '?', stage_status.new.name);
5478 break;
5480 case REQ_REFRESH:
5481 /* Reload everything ... */
5482 break;
5484 case REQ_VIEW_BLAME:
5485 if (stage_status.new.name[0]) {
5486 string_copy(opt_file, stage_status.new.name);
5487 opt_ref[0] = 0;
5488 }
5489 return request;
5491 case REQ_ENTER:
5492 return pager_request(view, request, line);
5494 default:
5495 return request;
5496 }
5498 VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5499 open_view(view, REQ_VIEW_STATUS, OPEN_REFRESH);
5501 /* Check whether the staged entry still exists, and close the
5502 * stage view if it doesn't. */
5503 if (!status_exists(&stage_status, stage_line_type)) {
5504 status_restore(VIEW(REQ_VIEW_STATUS));
5505 return REQ_VIEW_CLOSE;
5506 }
5508 if (stage_line_type == LINE_STAT_UNTRACKED) {
5509 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5510 report("Cannot display a directory");
5511 return REQ_NONE;
5512 }
5514 if (!prepare_update_file(view, stage_status.new.name)) {
5515 report("Failed to open file: %s", strerror(errno));
5516 return REQ_NONE;
5517 }
5518 }
5519 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5521 return REQ_NONE;
5522 }
5524 static struct view_ops stage_ops = {
5525 "line",
5526 NULL,
5527 NULL,
5528 pager_read,
5529 pager_draw,
5530 stage_request,
5531 pager_grep,
5532 pager_select,
5533 };
5536 /*
5537 * Revision graph
5538 */
5540 struct commit {
5541 char id[SIZEOF_REV]; /* SHA1 ID. */
5542 char title[128]; /* First line of the commit message. */
5543 char author[75]; /* Author of the commit. */
5544 struct tm time; /* Date from the author ident. */
5545 struct ref **refs; /* Repository references. */
5546 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
5547 size_t graph_size; /* The width of the graph array. */
5548 bool has_parents; /* Rewritten --parents seen. */
5549 };
5551 /* Size of rev graph with no "padding" columns */
5552 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5554 struct rev_graph {
5555 struct rev_graph *prev, *next, *parents;
5556 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5557 size_t size;
5558 struct commit *commit;
5559 size_t pos;
5560 unsigned int boundary:1;
5561 };
5563 /* Parents of the commit being visualized. */
5564 static struct rev_graph graph_parents[4];
5566 /* The current stack of revisions on the graph. */
5567 static struct rev_graph graph_stacks[4] = {
5568 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5569 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5570 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5571 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5572 };
5574 static inline bool
5575 graph_parent_is_merge(struct rev_graph *graph)
5576 {
5577 return graph->parents->size > 1;
5578 }
5580 static inline void
5581 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5582 {
5583 struct commit *commit = graph->commit;
5585 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5586 commit->graph[commit->graph_size++] = symbol;
5587 }
5589 static void
5590 clear_rev_graph(struct rev_graph *graph)
5591 {
5592 graph->boundary = 0;
5593 graph->size = graph->pos = 0;
5594 graph->commit = NULL;
5595 memset(graph->parents, 0, sizeof(*graph->parents));
5596 }
5598 static void
5599 done_rev_graph(struct rev_graph *graph)
5600 {
5601 if (graph_parent_is_merge(graph) &&
5602 graph->pos < graph->size - 1 &&
5603 graph->next->size == graph->size + graph->parents->size - 1) {
5604 size_t i = graph->pos + graph->parents->size - 1;
5606 graph->commit->graph_size = i * 2;
5607 while (i < graph->next->size - 1) {
5608 append_to_rev_graph(graph, ' ');
5609 append_to_rev_graph(graph, '\\');
5610 i++;
5611 }
5612 }
5614 clear_rev_graph(graph);
5615 }
5617 static void
5618 push_rev_graph(struct rev_graph *graph, const char *parent)
5619 {
5620 int i;
5622 /* "Collapse" duplicate parents lines.
5623 *
5624 * FIXME: This needs to also update update the drawn graph but
5625 * for now it just serves as a method for pruning graph lines. */
5626 for (i = 0; i < graph->size; i++)
5627 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5628 return;
5630 if (graph->size < SIZEOF_REVITEMS) {
5631 string_copy_rev(graph->rev[graph->size++], parent);
5632 }
5633 }
5635 static chtype
5636 get_rev_graph_symbol(struct rev_graph *graph)
5637 {
5638 chtype symbol;
5640 if (graph->boundary)
5641 symbol = REVGRAPH_BOUND;
5642 else if (graph->parents->size == 0)
5643 symbol = REVGRAPH_INIT;
5644 else if (graph_parent_is_merge(graph))
5645 symbol = REVGRAPH_MERGE;
5646 else if (graph->pos >= graph->size)
5647 symbol = REVGRAPH_BRANCH;
5648 else
5649 symbol = REVGRAPH_COMMIT;
5651 return symbol;
5652 }
5654 static void
5655 draw_rev_graph(struct rev_graph *graph)
5656 {
5657 struct rev_filler {
5658 chtype separator, line;
5659 };
5660 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
5661 static struct rev_filler fillers[] = {
5662 { ' ', '|' },
5663 { '`', '.' },
5664 { '\'', ' ' },
5665 { '/', ' ' },
5666 };
5667 chtype symbol = get_rev_graph_symbol(graph);
5668 struct rev_filler *filler;
5669 size_t i;
5671 if (opt_line_graphics)
5672 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
5674 filler = &fillers[DEFAULT];
5676 for (i = 0; i < graph->pos; i++) {
5677 append_to_rev_graph(graph, filler->line);
5678 if (graph_parent_is_merge(graph->prev) &&
5679 graph->prev->pos == i)
5680 filler = &fillers[RSHARP];
5682 append_to_rev_graph(graph, filler->separator);
5683 }
5685 /* Place the symbol for this revision. */
5686 append_to_rev_graph(graph, symbol);
5688 if (graph->prev->size > graph->size)
5689 filler = &fillers[RDIAG];
5690 else
5691 filler = &fillers[DEFAULT];
5693 i++;
5695 for (; i < graph->size; i++) {
5696 append_to_rev_graph(graph, filler->separator);
5697 append_to_rev_graph(graph, filler->line);
5698 if (graph_parent_is_merge(graph->prev) &&
5699 i < graph->prev->pos + graph->parents->size)
5700 filler = &fillers[RSHARP];
5701 if (graph->prev->size > graph->size)
5702 filler = &fillers[LDIAG];
5703 }
5705 if (graph->prev->size > graph->size) {
5706 append_to_rev_graph(graph, filler->separator);
5707 if (filler->line != ' ')
5708 append_to_rev_graph(graph, filler->line);
5709 }
5710 }
5712 /* Prepare the next rev graph */
5713 static void
5714 prepare_rev_graph(struct rev_graph *graph)
5715 {
5716 size_t i;
5718 /* First, traverse all lines of revisions up to the active one. */
5719 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5720 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5721 break;
5723 push_rev_graph(graph->next, graph->rev[graph->pos]);
5724 }
5726 /* Interleave the new revision parent(s). */
5727 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5728 push_rev_graph(graph->next, graph->parents->rev[i]);
5730 /* Lastly, put any remaining revisions. */
5731 for (i = graph->pos + 1; i < graph->size; i++)
5732 push_rev_graph(graph->next, graph->rev[i]);
5733 }
5735 static void
5736 update_rev_graph(struct view *view, struct rev_graph *graph)
5737 {
5738 /* If this is the finalizing update ... */
5739 if (graph->commit)
5740 prepare_rev_graph(graph);
5742 /* Graph visualization needs a one rev look-ahead,
5743 * so the first update doesn't visualize anything. */
5744 if (!graph->prev->commit)
5745 return;
5747 if (view->lines > 2)
5748 view->line[view->lines - 3].dirty = 1;
5749 if (view->lines > 1)
5750 view->line[view->lines - 2].dirty = 1;
5751 draw_rev_graph(graph->prev);
5752 done_rev_graph(graph->prev->prev);
5753 }
5756 /*
5757 * Main view backend
5758 */
5760 static const char *main_argv[SIZEOF_ARG] = {
5761 "git", "log", "--no-color", "--pretty=raw", "--parents",
5762 "--topo-order", "%(head)", NULL
5763 };
5765 static bool
5766 main_draw(struct view *view, struct line *line, unsigned int lineno)
5767 {
5768 struct commit *commit = line->data;
5770 if (!*commit->author)
5771 return FALSE;
5773 if (opt_date && draw_date(view, &commit->time))
5774 return TRUE;
5776 if (opt_author && draw_author(view, commit->author))
5777 return TRUE;
5779 if (opt_rev_graph && commit->graph_size &&
5780 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5781 return TRUE;
5783 if (opt_show_refs && commit->refs) {
5784 size_t i = 0;
5786 do {
5787 enum line_type type;
5789 if (commit->refs[i]->head)
5790 type = LINE_MAIN_HEAD;
5791 else if (commit->refs[i]->ltag)
5792 type = LINE_MAIN_LOCAL_TAG;
5793 else if (commit->refs[i]->tag)
5794 type = LINE_MAIN_TAG;
5795 else if (commit->refs[i]->tracked)
5796 type = LINE_MAIN_TRACKED;
5797 else if (commit->refs[i]->remote)
5798 type = LINE_MAIN_REMOTE;
5799 else
5800 type = LINE_MAIN_REF;
5802 if (draw_text(view, type, "[", TRUE) ||
5803 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5804 draw_text(view, type, "]", TRUE))
5805 return TRUE;
5807 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5808 return TRUE;
5809 } while (commit->refs[i++]->next);
5810 }
5812 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5813 return TRUE;
5814 }
5816 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5817 static bool
5818 main_read(struct view *view, char *line)
5819 {
5820 static struct rev_graph *graph = graph_stacks;
5821 enum line_type type;
5822 struct commit *commit;
5824 if (!line) {
5825 int i;
5827 if (!view->lines && !view->parent)
5828 die("No revisions match the given arguments.");
5829 if (view->lines > 0) {
5830 commit = view->line[view->lines - 1].data;
5831 view->line[view->lines - 1].dirty = 1;
5832 if (!*commit->author) {
5833 view->lines--;
5834 free(commit);
5835 graph->commit = NULL;
5836 }
5837 }
5838 update_rev_graph(view, graph);
5840 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5841 clear_rev_graph(&graph_stacks[i]);
5842 return TRUE;
5843 }
5845 type = get_line_type(line);
5846 if (type == LINE_COMMIT) {
5847 commit = calloc(1, sizeof(struct commit));
5848 if (!commit)
5849 return FALSE;
5851 line += STRING_SIZE("commit ");
5852 if (*line == '-') {
5853 graph->boundary = 1;
5854 line++;
5855 }
5857 string_copy_rev(commit->id, line);
5858 commit->refs = get_refs(commit->id);
5859 graph->commit = commit;
5860 add_line_data(view, commit, LINE_MAIN_COMMIT);
5862 while ((line = strchr(line, ' '))) {
5863 line++;
5864 push_rev_graph(graph->parents, line);
5865 commit->has_parents = TRUE;
5866 }
5867 return TRUE;
5868 }
5870 if (!view->lines)
5871 return TRUE;
5872 commit = view->line[view->lines - 1].data;
5874 switch (type) {
5875 case LINE_PARENT:
5876 if (commit->has_parents)
5877 break;
5878 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5879 break;
5881 case LINE_AUTHOR:
5882 parse_author_line(line + STRING_SIZE("author "),
5883 commit->author, sizeof(commit->author),
5884 &commit->time);
5885 update_rev_graph(view, graph);
5886 graph = graph->next;
5887 break;
5889 default:
5890 /* Fill in the commit title if it has not already been set. */
5891 if (commit->title[0])
5892 break;
5894 /* Require titles to start with a non-space character at the
5895 * offset used by git log. */
5896 if (strncmp(line, " ", 4))
5897 break;
5898 line += 4;
5899 /* Well, if the title starts with a whitespace character,
5900 * try to be forgiving. Otherwise we end up with no title. */
5901 while (isspace(*line))
5902 line++;
5903 if (*line == '\0')
5904 break;
5905 /* FIXME: More graceful handling of titles; append "..." to
5906 * shortened titles, etc. */
5908 string_expand(commit->title, sizeof(commit->title), line, 1);
5909 view->line[view->lines - 1].dirty = 1;
5910 }
5912 return TRUE;
5913 }
5915 static enum request
5916 main_request(struct view *view, enum request request, struct line *line)
5917 {
5918 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5920 switch (request) {
5921 case REQ_ENTER:
5922 open_view(view, REQ_VIEW_DIFF, flags);
5923 break;
5924 case REQ_REFRESH:
5925 load_refs();
5926 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5927 break;
5928 default:
5929 return request;
5930 }
5932 return REQ_NONE;
5933 }
5935 static bool
5936 grep_refs(struct ref **refs, regex_t *regex)
5937 {
5938 regmatch_t pmatch;
5939 size_t i = 0;
5941 if (!refs)
5942 return FALSE;
5943 do {
5944 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5945 return TRUE;
5946 } while (refs[i++]->next);
5948 return FALSE;
5949 }
5951 static bool
5952 main_grep(struct view *view, struct line *line)
5953 {
5954 struct commit *commit = line->data;
5955 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5956 char buf[DATE_COLS + 1];
5957 regmatch_t pmatch;
5959 for (state = S_TITLE; state < S_END; state++) {
5960 char *text;
5962 switch (state) {
5963 case S_TITLE: text = commit->title; break;
5964 case S_AUTHOR:
5965 if (!opt_author)
5966 continue;
5967 text = commit->author;
5968 break;
5969 case S_DATE:
5970 if (!opt_date)
5971 continue;
5972 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5973 continue;
5974 text = buf;
5975 break;
5976 case S_REFS:
5977 if (!opt_show_refs)
5978 continue;
5979 if (grep_refs(commit->refs, view->regex) == TRUE)
5980 return TRUE;
5981 continue;
5982 default:
5983 return FALSE;
5984 }
5986 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5987 return TRUE;
5988 }
5990 return FALSE;
5991 }
5993 static void
5994 main_select(struct view *view, struct line *line)
5995 {
5996 struct commit *commit = line->data;
5998 string_copy_rev(view->ref, commit->id);
5999 string_copy_rev(ref_commit, view->ref);
6000 }
6002 static struct view_ops main_ops = {
6003 "commit",
6004 main_argv,
6005 NULL,
6006 main_read,
6007 main_draw,
6008 main_request,
6009 main_grep,
6010 main_select,
6011 };
6014 /*
6015 * Unicode / UTF-8 handling
6016 *
6017 * NOTE: Much of the following code for dealing with Unicode is derived from
6018 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
6019 * src/intl/charset.c from the UTF-8 branch commit elinks-0.11.0-g31f2c28.
6020 */
6022 static inline int
6023 unicode_width(unsigned long c)
6024 {
6025 if (c >= 0x1100 &&
6026 (c <= 0x115f /* Hangul Jamo */
6027 || c == 0x2329
6028 || c == 0x232a
6029 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
6030 /* CJK ... Yi */
6031 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
6032 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
6033 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
6034 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
6035 || (c >= 0xffe0 && c <= 0xffe6)
6036 || (c >= 0x20000 && c <= 0x2fffd)
6037 || (c >= 0x30000 && c <= 0x3fffd)))
6038 return 2;
6040 if (c == '\t')
6041 return opt_tab_size;
6043 return 1;
6044 }
6046 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
6047 * Illegal bytes are set one. */
6048 static const unsigned char utf8_bytes[256] = {
6049 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,
6050 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,
6051 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,
6052 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,
6053 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,
6054 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,
6055 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,
6056 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,
6057 };
6059 /* Decode UTF-8 multi-byte representation into a Unicode character. */
6060 static inline unsigned long
6061 utf8_to_unicode(const char *string, size_t length)
6062 {
6063 unsigned long unicode;
6065 switch (length) {
6066 case 1:
6067 unicode = string[0];
6068 break;
6069 case 2:
6070 unicode = (string[0] & 0x1f) << 6;
6071 unicode += (string[1] & 0x3f);
6072 break;
6073 case 3:
6074 unicode = (string[0] & 0x0f) << 12;
6075 unicode += ((string[1] & 0x3f) << 6);
6076 unicode += (string[2] & 0x3f);
6077 break;
6078 case 4:
6079 unicode = (string[0] & 0x0f) << 18;
6080 unicode += ((string[1] & 0x3f) << 12);
6081 unicode += ((string[2] & 0x3f) << 6);
6082 unicode += (string[3] & 0x3f);
6083 break;
6084 case 5:
6085 unicode = (string[0] & 0x0f) << 24;
6086 unicode += ((string[1] & 0x3f) << 18);
6087 unicode += ((string[2] & 0x3f) << 12);
6088 unicode += ((string[3] & 0x3f) << 6);
6089 unicode += (string[4] & 0x3f);
6090 break;
6091 case 6:
6092 unicode = (string[0] & 0x01) << 30;
6093 unicode += ((string[1] & 0x3f) << 24);
6094 unicode += ((string[2] & 0x3f) << 18);
6095 unicode += ((string[3] & 0x3f) << 12);
6096 unicode += ((string[4] & 0x3f) << 6);
6097 unicode += (string[5] & 0x3f);
6098 break;
6099 default:
6100 die("Invalid Unicode length");
6101 }
6103 /* Invalid characters could return the special 0xfffd value but NUL
6104 * should be just as good. */
6105 return unicode > 0xffff ? 0 : unicode;
6106 }
6108 /* Calculates how much of string can be shown within the given maximum width
6109 * and sets trimmed parameter to non-zero value if all of string could not be
6110 * shown. If the reserve flag is TRUE, it will reserve at least one
6111 * trailing character, which can be useful when drawing a delimiter.
6112 *
6113 * Returns the number of bytes to output from string to satisfy max_width. */
6114 static size_t
6115 utf8_length(const char **start, size_t skip, int *width, size_t max_width, int *trimmed, bool reserve)
6116 {
6117 const char *string = *start;
6118 const char *end = strchr(string, '\0');
6119 unsigned char last_bytes = 0;
6120 size_t last_ucwidth = 0;
6122 *width = 0;
6123 *trimmed = 0;
6125 while (string < end) {
6126 int c = *(unsigned char *) string;
6127 unsigned char bytes = utf8_bytes[c];
6128 size_t ucwidth;
6129 unsigned long unicode;
6131 if (string + bytes > end)
6132 break;
6134 /* Change representation to figure out whether
6135 * it is a single- or double-width character. */
6137 unicode = utf8_to_unicode(string, bytes);
6138 /* FIXME: Graceful handling of invalid Unicode character. */
6139 if (!unicode)
6140 break;
6142 ucwidth = unicode_width(unicode);
6143 if (skip > 0) {
6144 skip -= ucwidth <= skip ? ucwidth : skip;
6145 *start += bytes;
6146 }
6147 *width += ucwidth;
6148 if (*width > max_width) {
6149 *trimmed = 1;
6150 *width -= ucwidth;
6151 if (reserve && *width == max_width) {
6152 string -= last_bytes;
6153 *width -= last_ucwidth;
6154 }
6155 break;
6156 }
6158 string += bytes;
6159 last_bytes = ucwidth ? bytes : 0;
6160 last_ucwidth = ucwidth;
6161 }
6163 return string - *start;
6164 }
6167 /*
6168 * Status management
6169 */
6171 /* Whether or not the curses interface has been initialized. */
6172 static bool cursed = FALSE;
6174 /* Terminal hacks and workarounds. */
6175 static bool use_scroll_redrawwin;
6176 static bool use_scroll_status_wclear;
6178 /* The status window is used for polling keystrokes. */
6179 static WINDOW *status_win;
6181 /* Reading from the prompt? */
6182 static bool input_mode = FALSE;
6184 static bool status_empty = FALSE;
6186 /* Update status and title window. */
6187 static void
6188 report(const char *msg, ...)
6189 {
6190 struct view *view = display[current_view];
6192 if (input_mode)
6193 return;
6195 if (!view) {
6196 char buf[SIZEOF_STR];
6197 va_list args;
6199 va_start(args, msg);
6200 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6201 buf[sizeof(buf) - 1] = 0;
6202 buf[sizeof(buf) - 2] = '.';
6203 buf[sizeof(buf) - 3] = '.';
6204 buf[sizeof(buf) - 4] = '.';
6205 }
6206 va_end(args);
6207 die("%s", buf);
6208 }
6210 if (!status_empty || *msg) {
6211 va_list args;
6213 va_start(args, msg);
6215 wmove(status_win, 0, 0);
6216 if (view->has_scrolled && use_scroll_status_wclear)
6217 wclear(status_win);
6218 if (*msg) {
6219 vwprintw(status_win, msg, args);
6220 status_empty = FALSE;
6221 } else {
6222 status_empty = TRUE;
6223 }
6224 wclrtoeol(status_win);
6225 wnoutrefresh(status_win);
6227 va_end(args);
6228 }
6230 update_view_title(view);
6231 }
6233 /* Controls when nodelay should be in effect when polling user input. */
6234 static void
6235 set_nonblocking_input(bool loading)
6236 {
6237 static unsigned int loading_views;
6239 if ((loading == FALSE && loading_views-- == 1) ||
6240 (loading == TRUE && loading_views++ == 0))
6241 nodelay(status_win, loading);
6242 }
6244 static void
6245 init_display(void)
6246 {
6247 const char *term;
6248 int x, y;
6250 /* Initialize the curses library */
6251 if (isatty(STDIN_FILENO)) {
6252 cursed = !!initscr();
6253 opt_tty = stdin;
6254 } else {
6255 /* Leave stdin and stdout alone when acting as a pager. */
6256 opt_tty = fopen("/dev/tty", "r+");
6257 if (!opt_tty)
6258 die("Failed to open /dev/tty");
6259 cursed = !!newterm(NULL, opt_tty, opt_tty);
6260 }
6262 if (!cursed)
6263 die("Failed to initialize curses");
6265 nonl(); /* Disable conversion and detect newlines from input. */
6266 cbreak(); /* Take input chars one at a time, no wait for \n */
6267 noecho(); /* Don't echo input */
6268 leaveok(stdscr, FALSE);
6270 if (has_colors())
6271 init_colors();
6273 getmaxyx(stdscr, y, x);
6274 status_win = newwin(1, 0, y - 1, 0);
6275 if (!status_win)
6276 die("Failed to create status window");
6278 /* Enable keyboard mapping */
6279 keypad(status_win, TRUE);
6280 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6282 TABSIZE = opt_tab_size;
6283 if (opt_line_graphics) {
6284 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
6285 }
6287 term = getenv("XTERM_VERSION") ? NULL : getenv("COLORTERM");
6288 if (term && !strcmp(term, "gnome-terminal")) {
6289 /* In the gnome-terminal-emulator, the message from
6290 * scrolling up one line when impossible followed by
6291 * scrolling down one line causes corruption of the
6292 * status line. This is fixed by calling wclear. */
6293 use_scroll_status_wclear = TRUE;
6294 use_scroll_redrawwin = FALSE;
6296 } else if (term && !strcmp(term, "xrvt-xpm")) {
6297 /* No problems with full optimizations in xrvt-(unicode)
6298 * and aterm. */
6299 use_scroll_status_wclear = use_scroll_redrawwin = FALSE;
6301 } else {
6302 /* When scrolling in (u)xterm the last line in the
6303 * scrolling direction will update slowly. */
6304 use_scroll_redrawwin = TRUE;
6305 use_scroll_status_wclear = FALSE;
6306 }
6307 }
6309 static int
6310 get_input(int prompt_position)
6311 {
6312 struct view *view;
6313 int i, key, cursor_y, cursor_x;
6315 if (prompt_position)
6316 input_mode = TRUE;
6318 while (TRUE) {
6319 foreach_view (view, i) {
6320 update_view(view);
6321 if (view_is_displayed(view) && view->has_scrolled &&
6322 use_scroll_redrawwin)
6323 redrawwin(view->win);
6324 view->has_scrolled = FALSE;
6325 }
6327 /* Update the cursor position. */
6328 if (prompt_position) {
6329 getbegyx(status_win, cursor_y, cursor_x);
6330 cursor_x = prompt_position;
6331 } else {
6332 view = display[current_view];
6333 getbegyx(view->win, cursor_y, cursor_x);
6334 cursor_x = view->width - 1;
6335 cursor_y += view->lineno - view->offset;
6336 }
6337 setsyx(cursor_y, cursor_x);
6339 /* Refresh, accept single keystroke of input */
6340 doupdate();
6341 key = wgetch(status_win);
6343 /* wgetch() with nodelay() enabled returns ERR when
6344 * there's no input. */
6345 if (key == ERR) {
6347 } else if (key == KEY_RESIZE) {
6348 int height, width;
6350 getmaxyx(stdscr, height, width);
6352 wresize(status_win, 1, width);
6353 mvwin(status_win, height - 1, 0);
6354 wnoutrefresh(status_win);
6355 resize_display();
6356 redraw_display(TRUE);
6358 } else {
6359 input_mode = FALSE;
6360 return key;
6361 }
6362 }
6363 }
6365 static char *
6366 prompt_input(const char *prompt, input_handler handler, void *data)
6367 {
6368 enum input_status status = INPUT_OK;
6369 static char buf[SIZEOF_STR];
6370 size_t pos = 0;
6372 buf[pos] = 0;
6374 while (status == INPUT_OK || status == INPUT_SKIP) {
6375 int key;
6377 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6378 wclrtoeol(status_win);
6380 key = get_input(pos + 1);
6381 switch (key) {
6382 case KEY_RETURN:
6383 case KEY_ENTER:
6384 case '\n':
6385 status = pos ? INPUT_STOP : INPUT_CANCEL;
6386 break;
6388 case KEY_BACKSPACE:
6389 if (pos > 0)
6390 buf[--pos] = 0;
6391 else
6392 status = INPUT_CANCEL;
6393 break;
6395 case KEY_ESC:
6396 status = INPUT_CANCEL;
6397 break;
6399 default:
6400 if (pos >= sizeof(buf)) {
6401 report("Input string too long");
6402 return NULL;
6403 }
6405 status = handler(data, buf, key);
6406 if (status == INPUT_OK)
6407 buf[pos++] = (char) key;
6408 }
6409 }
6411 /* Clear the status window */
6412 status_empty = FALSE;
6413 report("");
6415 if (status == INPUT_CANCEL)
6416 return NULL;
6418 buf[pos++] = 0;
6420 return buf;
6421 }
6423 static enum input_status
6424 prompt_yesno_handler(void *data, char *buf, int c)
6425 {
6426 if (c == 'y' || c == 'Y')
6427 return INPUT_STOP;
6428 if (c == 'n' || c == 'N')
6429 return INPUT_CANCEL;
6430 return INPUT_SKIP;
6431 }
6433 static bool
6434 prompt_yesno(const char *prompt)
6435 {
6436 char prompt2[SIZEOF_STR];
6438 if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6439 return FALSE;
6441 return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6442 }
6444 static enum input_status
6445 read_prompt_handler(void *data, char *buf, int c)
6446 {
6447 return isprint(c) ? INPUT_OK : INPUT_SKIP;
6448 }
6450 static char *
6451 read_prompt(const char *prompt)
6452 {
6453 return prompt_input(prompt, read_prompt_handler, NULL);
6454 }
6456 /*
6457 * Repository properties
6458 */
6460 static struct ref *refs = NULL;
6461 static size_t refs_alloc = 0;
6462 static size_t refs_size = 0;
6464 /* Id <-> ref store */
6465 static struct ref ***id_refs = NULL;
6466 static size_t id_refs_alloc = 0;
6467 static size_t id_refs_size = 0;
6469 static int
6470 compare_refs(const void *ref1_, const void *ref2_)
6471 {
6472 const struct ref *ref1 = *(const struct ref **)ref1_;
6473 const struct ref *ref2 = *(const struct ref **)ref2_;
6475 if (ref1->tag != ref2->tag)
6476 return ref2->tag - ref1->tag;
6477 if (ref1->ltag != ref2->ltag)
6478 return ref2->ltag - ref2->ltag;
6479 if (ref1->head != ref2->head)
6480 return ref2->head - ref1->head;
6481 if (ref1->tracked != ref2->tracked)
6482 return ref2->tracked - ref1->tracked;
6483 if (ref1->remote != ref2->remote)
6484 return ref2->remote - ref1->remote;
6485 return strcmp(ref1->name, ref2->name);
6486 }
6488 static struct ref **
6489 get_refs(const char *id)
6490 {
6491 struct ref ***tmp_id_refs;
6492 struct ref **ref_list = NULL;
6493 size_t ref_list_alloc = 0;
6494 size_t ref_list_size = 0;
6495 size_t i;
6497 for (i = 0; i < id_refs_size; i++)
6498 if (!strcmp(id, id_refs[i][0]->id))
6499 return id_refs[i];
6501 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
6502 sizeof(*id_refs));
6503 if (!tmp_id_refs)
6504 return NULL;
6506 id_refs = tmp_id_refs;
6508 for (i = 0; i < refs_size; i++) {
6509 struct ref **tmp;
6511 if (strcmp(id, refs[i].id))
6512 continue;
6514 tmp = realloc_items(ref_list, &ref_list_alloc,
6515 ref_list_size + 1, sizeof(*ref_list));
6516 if (!tmp) {
6517 if (ref_list)
6518 free(ref_list);
6519 return NULL;
6520 }
6522 ref_list = tmp;
6523 ref_list[ref_list_size] = &refs[i];
6524 /* XXX: The properties of the commit chains ensures that we can
6525 * safely modify the shared ref. The repo references will
6526 * always be similar for the same id. */
6527 ref_list[ref_list_size]->next = 1;
6529 ref_list_size++;
6530 }
6532 if (ref_list) {
6533 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
6534 ref_list[ref_list_size - 1]->next = 0;
6535 id_refs[id_refs_size++] = ref_list;
6536 }
6538 return ref_list;
6539 }
6541 static int
6542 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6543 {
6544 struct ref *ref;
6545 bool tag = FALSE;
6546 bool ltag = FALSE;
6547 bool remote = FALSE;
6548 bool tracked = FALSE;
6549 bool check_replace = FALSE;
6550 bool head = FALSE;
6552 if (!prefixcmp(name, "refs/tags/")) {
6553 if (!suffixcmp(name, namelen, "^{}")) {
6554 namelen -= 3;
6555 name[namelen] = 0;
6556 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
6557 check_replace = TRUE;
6558 } else {
6559 ltag = TRUE;
6560 }
6562 tag = TRUE;
6563 namelen -= STRING_SIZE("refs/tags/");
6564 name += STRING_SIZE("refs/tags/");
6566 } else if (!prefixcmp(name, "refs/remotes/")) {
6567 remote = TRUE;
6568 namelen -= STRING_SIZE("refs/remotes/");
6569 name += STRING_SIZE("refs/remotes/");
6570 tracked = !strcmp(opt_remote, name);
6572 } else if (!prefixcmp(name, "refs/heads/")) {
6573 namelen -= STRING_SIZE("refs/heads/");
6574 name += STRING_SIZE("refs/heads/");
6575 head = !strncmp(opt_head, name, namelen);
6577 } else if (!strcmp(name, "HEAD")) {
6578 string_ncopy(opt_head_rev, id, idlen);
6579 return OK;
6580 }
6582 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
6583 /* it's an annotated tag, replace the previous SHA1 with the
6584 * resolved commit id; relies on the fact git-ls-remote lists
6585 * the commit id of an annotated tag right before the commit id
6586 * it points to. */
6587 refs[refs_size - 1].ltag = ltag;
6588 string_copy_rev(refs[refs_size - 1].id, id);
6590 return OK;
6591 }
6592 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
6593 if (!refs)
6594 return ERR;
6596 ref = &refs[refs_size++];
6597 ref->name = malloc(namelen + 1);
6598 if (!ref->name)
6599 return ERR;
6601 strncpy(ref->name, name, namelen);
6602 ref->name[namelen] = 0;
6603 ref->head = head;
6604 ref->tag = tag;
6605 ref->ltag = ltag;
6606 ref->remote = remote;
6607 ref->tracked = tracked;
6608 string_copy_rev(ref->id, id);
6610 return OK;
6611 }
6613 static int
6614 load_refs(void)
6615 {
6616 static const char *ls_remote_argv[SIZEOF_ARG] = {
6617 "git", "ls-remote", ".", NULL
6618 };
6619 static bool init = FALSE;
6621 if (!init) {
6622 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6623 init = TRUE;
6624 }
6626 if (!*opt_git_dir)
6627 return OK;
6629 while (refs_size > 0)
6630 free(refs[--refs_size].name);
6631 while (id_refs_size > 0)
6632 free(id_refs[--id_refs_size]);
6634 return run_io_load(ls_remote_argv, "\t", read_ref);
6635 }
6637 static void
6638 set_repo_config_option(char *name, char *value, int (*cmd)(int, const char **))
6639 {
6640 const char *argv[SIZEOF_ARG] = { name, "=" };
6641 int argc = 1 + (cmd == option_set_command);
6642 int error = ERR;
6644 if (!argv_from_string(argv, &argc, value))
6645 config_msg = "Too many option arguments";
6646 else
6647 error = cmd(argc, argv);
6649 if (error == ERR)
6650 warn("Option 'tig.%s': %s", name, config_msg);
6651 }
6653 static int
6654 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
6655 {
6656 if (!strcmp(name, "i18n.commitencoding"))
6657 string_ncopy(opt_encoding, value, valuelen);
6659 if (!strcmp(name, "core.editor"))
6660 string_ncopy(opt_editor, value, valuelen);
6662 if (!prefixcmp(name, "tig.color."))
6663 set_repo_config_option(name + 10, value, option_color_command);
6665 else if (!prefixcmp(name, "tig.bind."))
6666 set_repo_config_option(name + 9, value, option_bind_command);
6668 else if (!prefixcmp(name, "tig."))
6669 set_repo_config_option(name + 4, value, option_set_command);
6671 /* branch.<head>.remote */
6672 if (*opt_head &&
6673 !strncmp(name, "branch.", 7) &&
6674 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6675 !strcmp(name + 7 + strlen(opt_head), ".remote"))
6676 string_ncopy(opt_remote, value, valuelen);
6678 if (*opt_head && *opt_remote &&
6679 !strncmp(name, "branch.", 7) &&
6680 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6681 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
6682 size_t from = strlen(opt_remote);
6684 if (!prefixcmp(value, "refs/heads/")) {
6685 value += STRING_SIZE("refs/heads/");
6686 valuelen -= STRING_SIZE("refs/heads/");
6687 }
6689 if (!string_format_from(opt_remote, &from, "/%s", value))
6690 opt_remote[0] = 0;
6691 }
6693 return OK;
6694 }
6696 static int
6697 load_git_config(void)
6698 {
6699 const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
6701 return run_io_load(config_list_argv, "=", read_repo_config_option);
6702 }
6704 static int
6705 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
6706 {
6707 if (!opt_git_dir[0]) {
6708 string_ncopy(opt_git_dir, name, namelen);
6710 } else if (opt_is_inside_work_tree == -1) {
6711 /* This can be 3 different values depending on the
6712 * version of git being used. If git-rev-parse does not
6713 * understand --is-inside-work-tree it will simply echo
6714 * the option else either "true" or "false" is printed.
6715 * Default to true for the unknown case. */
6716 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6718 } else if (*name == '.') {
6719 string_ncopy(opt_cdup, name, namelen);
6721 } else {
6722 string_ncopy(opt_prefix, name, namelen);
6723 }
6725 return OK;
6726 }
6728 static int
6729 load_repo_info(void)
6730 {
6731 const char *head_argv[] = {
6732 "git", "symbolic-ref", "HEAD", NULL
6733 };
6734 const char *rev_parse_argv[] = {
6735 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6736 "--show-cdup", "--show-prefix", NULL
6737 };
6739 if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
6740 chomp_string(opt_head);
6741 if (!prefixcmp(opt_head, "refs/heads/")) {
6742 char *offset = opt_head + STRING_SIZE("refs/heads/");
6744 memmove(opt_head, offset, strlen(offset) + 1);
6745 }
6746 }
6748 return run_io_load(rev_parse_argv, "=", read_repo_info);
6749 }
6752 /*
6753 * Main
6754 */
6756 static const char usage[] =
6757 "tig " TIG_VERSION " (" __DATE__ ")\n"
6758 "\n"
6759 "Usage: tig [options] [revs] [--] [paths]\n"
6760 " or: tig show [options] [revs] [--] [paths]\n"
6761 " or: tig blame [rev] path\n"
6762 " or: tig status\n"
6763 " or: tig < [git command output]\n"
6764 "\n"
6765 "Options:\n"
6766 " -v, --version Show version and exit\n"
6767 " -h, --help Show help message and exit";
6769 static void __NORETURN
6770 quit(int sig)
6771 {
6772 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6773 if (cursed)
6774 endwin();
6775 exit(0);
6776 }
6778 static void __NORETURN
6779 die(const char *err, ...)
6780 {
6781 va_list args;
6783 endwin();
6785 va_start(args, err);
6786 fputs("tig: ", stderr);
6787 vfprintf(stderr, err, args);
6788 fputs("\n", stderr);
6789 va_end(args);
6791 exit(1);
6792 }
6794 static void
6795 warn(const char *msg, ...)
6796 {
6797 va_list args;
6799 va_start(args, msg);
6800 fputs("tig warning: ", stderr);
6801 vfprintf(stderr, msg, args);
6802 fputs("\n", stderr);
6803 va_end(args);
6804 }
6806 static enum request
6807 parse_options(int argc, const char *argv[])
6808 {
6809 enum request request = REQ_VIEW_MAIN;
6810 const char *subcommand;
6811 bool seen_dashdash = FALSE;
6812 /* XXX: This is vulnerable to the user overriding options
6813 * required for the main view parser. */
6814 const char *custom_argv[SIZEOF_ARG] = {
6815 "git", "log", "--no-color", "--pretty=raw", "--parents",
6816 "--topo-order", NULL
6817 };
6818 int i, j = 6;
6820 if (!isatty(STDIN_FILENO)) {
6821 io_open(&VIEW(REQ_VIEW_PAGER)->io, "");
6822 return REQ_VIEW_PAGER;
6823 }
6825 if (argc <= 1)
6826 return REQ_NONE;
6828 subcommand = argv[1];
6829 if (!strcmp(subcommand, "status")) {
6830 if (argc > 2)
6831 warn("ignoring arguments after `%s'", subcommand);
6832 return REQ_VIEW_STATUS;
6834 } else if (!strcmp(subcommand, "blame")) {
6835 if (argc <= 2 || argc > 4)
6836 die("invalid number of options to blame\n\n%s", usage);
6838 i = 2;
6839 if (argc == 4) {
6840 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
6841 i++;
6842 }
6844 string_ncopy(opt_file, argv[i], strlen(argv[i]));
6845 return REQ_VIEW_BLAME;
6847 } else if (!strcmp(subcommand, "show")) {
6848 request = REQ_VIEW_DIFF;
6850 } else {
6851 subcommand = NULL;
6852 }
6854 if (subcommand) {
6855 custom_argv[1] = subcommand;
6856 j = 2;
6857 }
6859 for (i = 1 + !!subcommand; i < argc; i++) {
6860 const char *opt = argv[i];
6862 if (seen_dashdash || !strcmp(opt, "--")) {
6863 seen_dashdash = TRUE;
6865 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
6866 printf("tig version %s\n", TIG_VERSION);
6867 quit(0);
6869 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
6870 printf("%s\n", usage);
6871 quit(0);
6872 }
6874 custom_argv[j++] = opt;
6875 if (j >= ARRAY_SIZE(custom_argv))
6876 die("command too long");
6877 }
6879 if (!prepare_update(VIEW(request), custom_argv, NULL, FORMAT_NONE))
6880 die("Failed to format arguments");
6882 return request;
6883 }
6885 int
6886 main(int argc, const char *argv[])
6887 {
6888 enum request request = parse_options(argc, argv);
6889 struct view *view;
6890 size_t i;
6892 signal(SIGINT, quit);
6894 if (setlocale(LC_ALL, "")) {
6895 char *codeset = nl_langinfo(CODESET);
6897 string_ncopy(opt_codeset, codeset, strlen(codeset));
6898 }
6900 if (load_repo_info() == ERR)
6901 die("Failed to load repo info.");
6903 if (load_options() == ERR)
6904 die("Failed to load user config.");
6906 if (load_git_config() == ERR)
6907 die("Failed to load repo config.");
6909 /* Require a git repository unless when running in pager mode. */
6910 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6911 die("Not a git repository");
6913 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6914 opt_utf8 = FALSE;
6916 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6917 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6918 if (opt_iconv == ICONV_NONE)
6919 die("Failed to initialize character set conversion");
6920 }
6922 if (load_refs() == ERR)
6923 die("Failed to load refs.");
6925 foreach_view (view, i)
6926 argv_from_env(view->ops->argv, view->cmd_env);
6928 init_display();
6930 if (request != REQ_NONE)
6931 open_view(NULL, request, OPEN_PREPARED);
6932 request = request == REQ_NONE ? REQ_VIEW_MAIN : REQ_NONE;
6934 while (view_driver(display[current_view], request)) {
6935 int key = get_input(0);
6937 view = display[current_view];
6938 request = get_keybinding(view->keymap, key);
6940 /* Some low-level request handling. This keeps access to
6941 * status_win restricted. */
6942 switch (request) {
6943 case REQ_PROMPT:
6944 {
6945 char *cmd = read_prompt(":");
6947 if (cmd && isdigit(*cmd)) {
6948 int lineno = view->lineno + 1;
6950 if (parse_int(&lineno, cmd, 1, view->lines + 1) == OK) {
6951 select_view_line(view, lineno - 1);
6952 report("");
6953 } else {
6954 report("Unable to parse '%s' as a line number", cmd);
6955 }
6957 } else if (cmd) {
6958 struct view *next = VIEW(REQ_VIEW_PAGER);
6959 const char *argv[SIZEOF_ARG] = { "git" };
6960 int argc = 1;
6962 /* When running random commands, initially show the
6963 * command in the title. However, it maybe later be
6964 * overwritten if a commit line is selected. */
6965 string_ncopy(next->ref, cmd, strlen(cmd));
6967 if (!argv_from_string(argv, &argc, cmd)) {
6968 report("Too many arguments");
6969 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
6970 report("Failed to format command");
6971 } else {
6972 open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
6973 }
6974 }
6976 request = REQ_NONE;
6977 break;
6978 }
6979 case REQ_SEARCH:
6980 case REQ_SEARCH_BACK:
6981 {
6982 const char *prompt = request == REQ_SEARCH ? "/" : "?";
6983 char *search = read_prompt(prompt);
6985 if (search)
6986 string_ncopy(opt_search, search, strlen(search));
6987 else if (*opt_search)
6988 request = request == REQ_SEARCH ?
6989 REQ_FIND_NEXT :
6990 REQ_FIND_PREV;
6991 else
6992 request = REQ_NONE;
6993 break;
6994 }
6995 default:
6996 break;
6997 }
6998 }
7000 quit(0);
7002 return 0;
7003 }