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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 void
192 string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
193 {
194 size_t size, pos;
196 for (size = pos = 0; size < dstlen - 1 && src[pos]; pos++) {
197 if (src[pos] == '\t') {
198 size_t expanded = tabsize - (size % tabsize);
200 if (expanded + size >= dstlen - 1)
201 expanded = dstlen - size - 1;
202 memcpy(dst + size, " ", expanded);
203 size += expanded;
204 } else {
205 dst[size++] = src[pos];
206 }
207 }
209 dst[size] = 0;
210 }
212 static char *
213 chomp_string(char *name)
214 {
215 int namelen;
217 while (isspace(*name))
218 name++;
220 namelen = strlen(name) - 1;
221 while (namelen > 0 && isspace(name[namelen]))
222 name[namelen--] = 0;
224 return name;
225 }
227 static bool
228 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
229 {
230 va_list args;
231 size_t pos = bufpos ? *bufpos : 0;
233 va_start(args, fmt);
234 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
235 va_end(args);
237 if (bufpos)
238 *bufpos = pos;
240 return pos >= bufsize ? FALSE : TRUE;
241 }
243 #define string_format(buf, fmt, args...) \
244 string_nformat(buf, sizeof(buf), NULL, fmt, args)
246 #define string_format_from(buf, from, fmt, args...) \
247 string_nformat(buf, sizeof(buf), from, fmt, args)
249 static int
250 string_enum_compare(const char *str1, const char *str2, int len)
251 {
252 size_t i;
254 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
256 /* Diff-Header == DIFF_HEADER */
257 for (i = 0; i < len; i++) {
258 if (toupper(str1[i]) == toupper(str2[i]))
259 continue;
261 if (string_enum_sep(str1[i]) &&
262 string_enum_sep(str2[i]))
263 continue;
265 return str1[i] - str2[i];
266 }
268 return 0;
269 }
271 struct enum_map {
272 const char *name;
273 int namelen;
274 int value;
275 };
277 #define ENUM_MAP(name, value) { name, STRING_SIZE(name), value }
279 static bool
280 map_enum_do(struct enum_map *map, size_t map_size, int *value, const char *name)
281 {
282 size_t namelen = strlen(name);
283 int i;
285 for (i = 0; i < map_size; i++)
286 if (namelen == map[i].namelen &&
287 !string_enum_compare(name, map[i].name, namelen)) {
288 *value = map[i].value;
289 return TRUE;
290 }
292 return FALSE;
293 }
295 #define map_enum(attr, map, name) \
296 map_enum_do(map, ARRAY_SIZE(map), attr, name)
298 #define prefixcmp(str1, str2) \
299 strncmp(str1, str2, STRING_SIZE(str2))
301 static inline int
302 suffixcmp(const char *str, int slen, const char *suffix)
303 {
304 size_t len = slen >= 0 ? slen : strlen(str);
305 size_t suffixlen = strlen(suffix);
307 return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
308 }
311 static bool
312 argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
313 {
314 int valuelen;
316 while (*cmd && *argc < SIZEOF_ARG && (valuelen = strcspn(cmd, " \t"))) {
317 bool advance = cmd[valuelen] != 0;
319 cmd[valuelen] = 0;
320 argv[(*argc)++] = chomp_string(cmd);
321 cmd = chomp_string(cmd + valuelen + advance);
322 }
324 if (*argc < SIZEOF_ARG)
325 argv[*argc] = NULL;
326 return *argc < SIZEOF_ARG;
327 }
329 static void
330 argv_from_env(const char **argv, const char *name)
331 {
332 char *env = argv ? getenv(name) : NULL;
333 int argc = 0;
335 if (env && *env)
336 env = strdup(env);
337 if (env && !argv_from_string(argv, &argc, env))
338 die("Too many arguments in the `%s` environment variable", name);
339 }
342 /*
343 * Executing external commands.
344 */
346 enum io_type {
347 IO_FD, /* File descriptor based IO. */
348 IO_BG, /* Execute command in the background. */
349 IO_FG, /* Execute command with same std{in,out,err}. */
350 IO_RD, /* Read only fork+exec IO. */
351 IO_WR, /* Write only fork+exec IO. */
352 IO_AP, /* Append fork+exec output to file. */
353 };
355 struct io {
356 enum io_type type; /* The requested type of pipe. */
357 const char *dir; /* Directory from which to execute. */
358 pid_t pid; /* Pipe for reading or writing. */
359 int pipe; /* Pipe end for reading or writing. */
360 int error; /* Error status. */
361 const char *argv[SIZEOF_ARG]; /* Shell command arguments. */
362 char *buf; /* Read buffer. */
363 size_t bufalloc; /* Allocated buffer size. */
364 size_t bufsize; /* Buffer content size. */
365 char *bufpos; /* Current buffer position. */
366 unsigned int eof:1; /* Has end of file been reached. */
367 };
369 static void
370 reset_io(struct io *io)
371 {
372 io->pipe = -1;
373 io->pid = 0;
374 io->buf = io->bufpos = NULL;
375 io->bufalloc = io->bufsize = 0;
376 io->error = 0;
377 io->eof = 0;
378 }
380 static void
381 init_io(struct io *io, const char *dir, enum io_type type)
382 {
383 reset_io(io);
384 io->type = type;
385 io->dir = dir;
386 }
388 static bool
389 init_io_rd(struct io *io, const char *argv[], const char *dir,
390 enum format_flags flags)
391 {
392 init_io(io, dir, IO_RD);
393 return format_argv(io->argv, argv, flags);
394 }
396 static bool
397 io_open(struct io *io, const char *name)
398 {
399 init_io(io, NULL, IO_FD);
400 io->pipe = *name ? open(name, O_RDONLY) : STDIN_FILENO;
401 return io->pipe != -1;
402 }
404 static bool
405 kill_io(struct io *io)
406 {
407 return io->pid == 0 || kill(io->pid, SIGKILL) != -1;
408 }
410 static bool
411 done_io(struct io *io)
412 {
413 pid_t pid = io->pid;
415 if (io->pipe != -1)
416 close(io->pipe);
417 free(io->buf);
418 reset_io(io);
420 while (pid > 0) {
421 int status;
422 pid_t waiting = waitpid(pid, &status, 0);
424 if (waiting < 0) {
425 if (errno == EINTR)
426 continue;
427 report("waitpid failed (%s)", strerror(errno));
428 return FALSE;
429 }
431 return waiting == pid &&
432 !WIFSIGNALED(status) &&
433 WIFEXITED(status) &&
434 !WEXITSTATUS(status);
435 }
437 return TRUE;
438 }
440 static bool
441 start_io(struct io *io)
442 {
443 int pipefds[2] = { -1, -1 };
445 if (io->type == IO_FD)
446 return TRUE;
448 if ((io->type == IO_RD || io->type == IO_WR) &&
449 pipe(pipefds) < 0)
450 return FALSE;
451 else if (io->type == IO_AP)
452 pipefds[1] = io->pipe;
454 if ((io->pid = fork())) {
455 if (pipefds[!(io->type == IO_WR)] != -1)
456 close(pipefds[!(io->type == IO_WR)]);
457 if (io->pid != -1) {
458 io->pipe = pipefds[!!(io->type == IO_WR)];
459 return TRUE;
460 }
462 } else {
463 if (io->type != IO_FG) {
464 int devnull = open("/dev/null", O_RDWR);
465 int readfd = io->type == IO_WR ? pipefds[0] : devnull;
466 int writefd = (io->type == IO_RD || io->type == IO_AP)
467 ? pipefds[1] : devnull;
469 dup2(readfd, STDIN_FILENO);
470 dup2(writefd, STDOUT_FILENO);
471 dup2(devnull, STDERR_FILENO);
473 close(devnull);
474 if (pipefds[0] != -1)
475 close(pipefds[0]);
476 if (pipefds[1] != -1)
477 close(pipefds[1]);
478 }
480 if (io->dir && *io->dir && chdir(io->dir) == -1)
481 die("Failed to change directory: %s", strerror(errno));
483 execvp(io->argv[0], (char *const*) io->argv);
484 die("Failed to execute program: %s", strerror(errno));
485 }
487 if (pipefds[!!(io->type == IO_WR)] != -1)
488 close(pipefds[!!(io->type == IO_WR)]);
489 return FALSE;
490 }
492 static bool
493 run_io(struct io *io, const char **argv, const char *dir, enum io_type type)
494 {
495 init_io(io, dir, type);
496 if (!format_argv(io->argv, argv, FORMAT_NONE))
497 return FALSE;
498 return start_io(io);
499 }
501 static int
502 run_io_do(struct io *io)
503 {
504 return start_io(io) && done_io(io);
505 }
507 static int
508 run_io_bg(const char **argv)
509 {
510 struct io io = {};
512 init_io(&io, NULL, IO_BG);
513 if (!format_argv(io.argv, argv, FORMAT_NONE))
514 return FALSE;
515 return run_io_do(&io);
516 }
518 static bool
519 run_io_fg(const char **argv, const char *dir)
520 {
521 struct io io = {};
523 init_io(&io, dir, IO_FG);
524 if (!format_argv(io.argv, argv, FORMAT_NONE))
525 return FALSE;
526 return run_io_do(&io);
527 }
529 static bool
530 run_io_append(const char **argv, enum format_flags flags, int fd)
531 {
532 struct io io = {};
534 init_io(&io, NULL, IO_AP);
535 io.pipe = fd;
536 if (format_argv(io.argv, argv, flags))
537 return run_io_do(&io);
538 close(fd);
539 return FALSE;
540 }
542 static bool
543 run_io_rd(struct io *io, const char **argv, enum format_flags flags)
544 {
545 return init_io_rd(io, argv, NULL, flags) && start_io(io);
546 }
548 static bool
549 io_eof(struct io *io)
550 {
551 return io->eof;
552 }
554 static int
555 io_error(struct io *io)
556 {
557 return io->error;
558 }
560 static bool
561 io_strerror(struct io *io)
562 {
563 return strerror(io->error);
564 }
566 static bool
567 io_can_read(struct io *io)
568 {
569 struct timeval tv = { 0, 500 };
570 fd_set fds;
572 FD_ZERO(&fds);
573 FD_SET(io->pipe, &fds);
575 return select(io->pipe + 1, &fds, NULL, NULL, &tv) > 0;
576 }
578 static ssize_t
579 io_read(struct io *io, void *buf, size_t bufsize)
580 {
581 do {
582 ssize_t readsize = read(io->pipe, buf, bufsize);
584 if (readsize < 0 && (errno == EAGAIN || errno == EINTR))
585 continue;
586 else if (readsize == -1)
587 io->error = errno;
588 else if (readsize == 0)
589 io->eof = 1;
590 return readsize;
591 } while (1);
592 }
594 static char *
595 io_get(struct io *io, int c, bool can_read)
596 {
597 char *eol;
598 ssize_t readsize;
600 if (!io->buf) {
601 io->buf = io->bufpos = malloc(BUFSIZ);
602 if (!io->buf)
603 return NULL;
604 io->bufalloc = BUFSIZ;
605 io->bufsize = 0;
606 }
608 while (TRUE) {
609 if (io->bufsize > 0) {
610 eol = memchr(io->bufpos, c, io->bufsize);
611 if (eol) {
612 char *line = io->bufpos;
614 *eol = 0;
615 io->bufpos = eol + 1;
616 io->bufsize -= io->bufpos - line;
617 return line;
618 }
619 }
621 if (io_eof(io)) {
622 if (io->bufsize) {
623 io->bufpos[io->bufsize] = 0;
624 io->bufsize = 0;
625 return io->bufpos;
626 }
627 return NULL;
628 }
630 if (!can_read)
631 return NULL;
633 if (io->bufsize > 0 && io->bufpos > io->buf)
634 memmove(io->buf, io->bufpos, io->bufsize);
636 io->bufpos = io->buf;
637 readsize = io_read(io, io->buf + io->bufsize, io->bufalloc - io->bufsize);
638 if (io_error(io))
639 return NULL;
640 io->bufsize += readsize;
641 }
642 }
644 static bool
645 io_write(struct io *io, const void *buf, size_t bufsize)
646 {
647 size_t written = 0;
649 while (!io_error(io) && written < bufsize) {
650 ssize_t size;
652 size = write(io->pipe, buf + written, bufsize - written);
653 if (size < 0 && (errno == EAGAIN || errno == EINTR))
654 continue;
655 else if (size == -1)
656 io->error = errno;
657 else
658 written += size;
659 }
661 return written == bufsize;
662 }
664 static bool
665 io_read_buf(struct io *io, char buf[], size_t bufsize)
666 {
667 bool error;
669 io->buf = io->bufpos = buf;
670 io->bufalloc = bufsize;
671 error = !io_get(io, '\n', TRUE) && io_error(io);
672 io->buf = NULL;
674 return done_io(io) || error;
675 }
677 static bool
678 run_io_buf(const char **argv, char buf[], size_t bufsize)
679 {
680 struct io io = {};
682 return run_io_rd(&io, argv, FORMAT_NONE) && io_read_buf(&io, buf, bufsize);
683 }
685 static int
686 io_load(struct io *io, const char *separators,
687 int (*read_property)(char *, size_t, char *, size_t))
688 {
689 char *name;
690 int state = OK;
692 if (!start_io(io))
693 return ERR;
695 while (state == OK && (name = io_get(io, '\n', TRUE))) {
696 char *value;
697 size_t namelen;
698 size_t valuelen;
700 name = chomp_string(name);
701 namelen = strcspn(name, separators);
703 if (name[namelen]) {
704 name[namelen] = 0;
705 value = chomp_string(name + namelen + 1);
706 valuelen = strlen(value);
708 } else {
709 value = "";
710 valuelen = 0;
711 }
713 state = read_property(name, namelen, value, valuelen);
714 }
716 if (state != ERR && io_error(io))
717 state = ERR;
718 done_io(io);
720 return state;
721 }
723 static int
724 run_io_load(const char **argv, const char *separators,
725 int (*read_property)(char *, size_t, char *, size_t))
726 {
727 struct io io = {};
729 return init_io_rd(&io, argv, NULL, FORMAT_NONE)
730 ? io_load(&io, separators, read_property) : ERR;
731 }
734 /*
735 * User requests
736 */
738 #define REQ_INFO \
739 /* XXX: Keep the view request first and in sync with views[]. */ \
740 REQ_GROUP("View switching") \
741 REQ_(VIEW_MAIN, "Show main view"), \
742 REQ_(VIEW_DIFF, "Show diff view"), \
743 REQ_(VIEW_LOG, "Show log view"), \
744 REQ_(VIEW_TREE, "Show tree view"), \
745 REQ_(VIEW_BLOB, "Show blob view"), \
746 REQ_(VIEW_BLAME, "Show blame view"), \
747 REQ_(VIEW_HELP, "Show help page"), \
748 REQ_(VIEW_PAGER, "Show pager view"), \
749 REQ_(VIEW_STATUS, "Show status view"), \
750 REQ_(VIEW_STAGE, "Show stage view"), \
751 \
752 REQ_GROUP("View manipulation") \
753 REQ_(ENTER, "Enter current line and scroll"), \
754 REQ_(NEXT, "Move to next"), \
755 REQ_(PREVIOUS, "Move to previous"), \
756 REQ_(PARENT, "Move to parent"), \
757 REQ_(VIEW_NEXT, "Move focus to next view"), \
758 REQ_(REFRESH, "Reload and refresh"), \
759 REQ_(MAXIMIZE, "Maximize the current view"), \
760 REQ_(VIEW_CLOSE, "Close the current view"), \
761 REQ_(QUIT, "Close all views and quit"), \
762 \
763 REQ_GROUP("View specific requests") \
764 REQ_(STATUS_UPDATE, "Update file status"), \
765 REQ_(STATUS_REVERT, "Revert file changes"), \
766 REQ_(STATUS_MERGE, "Merge file using external tool"), \
767 REQ_(STAGE_NEXT, "Find next chunk to stage"), \
768 \
769 REQ_GROUP("Cursor navigation") \
770 REQ_(MOVE_UP, "Move cursor one line up"), \
771 REQ_(MOVE_DOWN, "Move cursor one line down"), \
772 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
773 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
774 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
775 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
776 \
777 REQ_GROUP("Scrolling") \
778 REQ_(SCROLL_LEFT, "Scroll two columns left"), \
779 REQ_(SCROLL_RIGHT, "Scroll two columns right"), \
780 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
781 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
782 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
783 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
784 \
785 REQ_GROUP("Searching") \
786 REQ_(SEARCH, "Search the view"), \
787 REQ_(SEARCH_BACK, "Search backwards in the view"), \
788 REQ_(FIND_NEXT, "Find next search match"), \
789 REQ_(FIND_PREV, "Find previous search match"), \
790 \
791 REQ_GROUP("Option manipulation") \
792 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
793 REQ_(TOGGLE_DATE, "Toggle date display"), \
794 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
795 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
796 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
797 \
798 REQ_GROUP("Misc") \
799 REQ_(PROMPT, "Bring up the prompt"), \
800 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
801 REQ_(SHOW_VERSION, "Show version information"), \
802 REQ_(STOP_LOADING, "Stop all loading views"), \
803 REQ_(EDIT, "Open in editor"), \
804 REQ_(NONE, "Do nothing")
807 /* User action requests. */
808 enum request {
809 #define REQ_GROUP(help)
810 #define REQ_(req, help) REQ_##req
812 /* Offset all requests to avoid conflicts with ncurses getch values. */
813 REQ_OFFSET = KEY_MAX + 1,
814 REQ_INFO
816 #undef REQ_GROUP
817 #undef REQ_
818 };
820 struct request_info {
821 enum request request;
822 const char *name;
823 int namelen;
824 const char *help;
825 };
827 static struct request_info req_info[] = {
828 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
829 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
830 REQ_INFO
831 #undef REQ_GROUP
832 #undef REQ_
833 };
835 static enum request
836 get_request(const char *name)
837 {
838 int namelen = strlen(name);
839 int i;
841 for (i = 0; i < ARRAY_SIZE(req_info); i++)
842 if (req_info[i].namelen == namelen &&
843 !string_enum_compare(req_info[i].name, name, namelen))
844 return req_info[i].request;
846 return REQ_NONE;
847 }
850 /*
851 * Options
852 */
854 /* Option and state variables. */
855 static bool opt_date = TRUE;
856 static bool opt_author = TRUE;
857 static bool opt_line_number = FALSE;
858 static bool opt_line_graphics = TRUE;
859 static bool opt_rev_graph = FALSE;
860 static bool opt_show_refs = TRUE;
861 static int opt_num_interval = NUMBER_INTERVAL;
862 static int opt_tab_size = TAB_SIZE;
863 static int opt_author_cols = AUTHOR_COLS-1;
864 static char opt_path[SIZEOF_STR] = "";
865 static char opt_file[SIZEOF_STR] = "";
866 static char opt_ref[SIZEOF_REF] = "";
867 static char opt_head[SIZEOF_REF] = "";
868 static char opt_head_rev[SIZEOF_REV] = "";
869 static char opt_remote[SIZEOF_REF] = "";
870 static char opt_encoding[20] = "UTF-8";
871 static bool opt_utf8 = TRUE;
872 static char opt_codeset[20] = "UTF-8";
873 static iconv_t opt_iconv = ICONV_NONE;
874 static char opt_search[SIZEOF_STR] = "";
875 static char opt_cdup[SIZEOF_STR] = "";
876 static char opt_prefix[SIZEOF_STR] = "";
877 static char opt_git_dir[SIZEOF_STR] = "";
878 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
879 static char opt_editor[SIZEOF_STR] = "";
880 static FILE *opt_tty = NULL;
882 #define is_initial_commit() (!*opt_head_rev)
883 #define is_head_commit(rev) (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
886 /*
887 * Line-oriented content detection.
888 */
890 #define LINE_INFO \
891 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
892 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
893 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
894 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
895 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
896 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
897 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
898 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
899 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
900 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
901 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
902 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
903 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
904 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
905 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
906 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
907 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
908 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
909 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
910 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
911 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
912 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
913 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
914 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
915 LINE(AUTHOR, "author ", COLOR_GREEN, COLOR_DEFAULT, 0), \
916 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
917 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
918 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
919 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
920 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
921 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
922 LINE(DELIMITER, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
923 LINE(DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
924 LINE(MODE, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
925 LINE(LINE_NUMBER, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
926 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
927 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
928 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
929 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
930 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
931 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
932 LINE(MAIN_TRACKED, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
933 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
934 LINE(MAIN_HEAD, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
935 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
936 LINE(TREE_HEAD, "", COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD), \
937 LINE(TREE_DIR, "", COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL), \
938 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
939 LINE(STAT_HEAD, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
940 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
941 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
942 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
943 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
944 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
945 LINE(BLAME_ID, "", COLOR_MAGENTA, COLOR_DEFAULT, 0)
947 enum line_type {
948 #define LINE(type, line, fg, bg, attr) \
949 LINE_##type
950 LINE_INFO,
951 LINE_NONE
952 #undef LINE
953 };
955 struct line_info {
956 const char *name; /* Option name. */
957 int namelen; /* Size of option name. */
958 const char *line; /* The start of line to match. */
959 int linelen; /* Size of string to match. */
960 int fg, bg, attr; /* Color and text attributes for the lines. */
961 };
963 static struct line_info line_info[] = {
964 #define LINE(type, line, fg, bg, attr) \
965 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
966 LINE_INFO
967 #undef LINE
968 };
970 static enum line_type
971 get_line_type(const char *line)
972 {
973 int linelen = strlen(line);
974 enum line_type type;
976 for (type = 0; type < ARRAY_SIZE(line_info); type++)
977 /* Case insensitive search matches Signed-off-by lines better. */
978 if (linelen >= line_info[type].linelen &&
979 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
980 return type;
982 return LINE_DEFAULT;
983 }
985 static inline int
986 get_line_attr(enum line_type type)
987 {
988 assert(type < ARRAY_SIZE(line_info));
989 return COLOR_PAIR(type) | line_info[type].attr;
990 }
992 static struct line_info *
993 get_line_info(const char *name)
994 {
995 size_t namelen = strlen(name);
996 enum line_type type;
998 for (type = 0; type < ARRAY_SIZE(line_info); type++)
999 if (namelen == line_info[type].namelen &&
1000 !string_enum_compare(line_info[type].name, name, namelen))
1001 return &line_info[type];
1003 return NULL;
1004 }
1006 static void
1007 init_colors(void)
1008 {
1009 int default_bg = line_info[LINE_DEFAULT].bg;
1010 int default_fg = line_info[LINE_DEFAULT].fg;
1011 enum line_type type;
1013 start_color();
1015 if (assume_default_colors(default_fg, default_bg) == ERR) {
1016 default_bg = COLOR_BLACK;
1017 default_fg = COLOR_WHITE;
1018 }
1020 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
1021 struct line_info *info = &line_info[type];
1022 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
1023 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
1025 init_pair(type, fg, bg);
1026 }
1027 }
1029 struct line {
1030 enum line_type type;
1032 /* State flags */
1033 unsigned int selected:1;
1034 unsigned int dirty:1;
1035 unsigned int cleareol:1;
1037 void *data; /* User data */
1038 };
1041 /*
1042 * Keys
1043 */
1045 struct keybinding {
1046 int alias;
1047 enum request request;
1048 };
1050 static struct keybinding default_keybindings[] = {
1051 /* View switching */
1052 { 'm', REQ_VIEW_MAIN },
1053 { 'd', REQ_VIEW_DIFF },
1054 { 'l', REQ_VIEW_LOG },
1055 { 't', REQ_VIEW_TREE },
1056 { 'f', REQ_VIEW_BLOB },
1057 { 'B', REQ_VIEW_BLAME },
1058 { 'p', REQ_VIEW_PAGER },
1059 { 'h', REQ_VIEW_HELP },
1060 { 'S', REQ_VIEW_STATUS },
1061 { 'c', REQ_VIEW_STAGE },
1063 /* View manipulation */
1064 { 'q', REQ_VIEW_CLOSE },
1065 { KEY_TAB, REQ_VIEW_NEXT },
1066 { KEY_RETURN, REQ_ENTER },
1067 { KEY_UP, REQ_PREVIOUS },
1068 { KEY_DOWN, REQ_NEXT },
1069 { 'R', REQ_REFRESH },
1070 { KEY_F(5), REQ_REFRESH },
1071 { 'O', REQ_MAXIMIZE },
1073 /* Cursor navigation */
1074 { 'k', REQ_MOVE_UP },
1075 { 'j', REQ_MOVE_DOWN },
1076 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1077 { KEY_END, REQ_MOVE_LAST_LINE },
1078 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1079 { ' ', REQ_MOVE_PAGE_DOWN },
1080 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1081 { 'b', REQ_MOVE_PAGE_UP },
1082 { '-', REQ_MOVE_PAGE_UP },
1084 /* Scrolling */
1085 { KEY_LEFT, REQ_SCROLL_LEFT },
1086 { KEY_RIGHT, REQ_SCROLL_RIGHT },
1087 { KEY_IC, REQ_SCROLL_LINE_UP },
1088 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1089 { 'w', REQ_SCROLL_PAGE_UP },
1090 { 's', REQ_SCROLL_PAGE_DOWN },
1092 /* Searching */
1093 { '/', REQ_SEARCH },
1094 { '?', REQ_SEARCH_BACK },
1095 { 'n', REQ_FIND_NEXT },
1096 { 'N', REQ_FIND_PREV },
1098 /* Misc */
1099 { 'Q', REQ_QUIT },
1100 { 'z', REQ_STOP_LOADING },
1101 { 'v', REQ_SHOW_VERSION },
1102 { 'r', REQ_SCREEN_REDRAW },
1103 { '.', REQ_TOGGLE_LINENO },
1104 { 'D', REQ_TOGGLE_DATE },
1105 { 'A', REQ_TOGGLE_AUTHOR },
1106 { 'g', REQ_TOGGLE_REV_GRAPH },
1107 { 'F', REQ_TOGGLE_REFS },
1108 { ':', REQ_PROMPT },
1109 { 'u', REQ_STATUS_UPDATE },
1110 { '!', REQ_STATUS_REVERT },
1111 { 'M', REQ_STATUS_MERGE },
1112 { '@', REQ_STAGE_NEXT },
1113 { ',', REQ_PARENT },
1114 { 'e', REQ_EDIT },
1115 };
1117 #define KEYMAP_INFO \
1118 KEYMAP_(GENERIC), \
1119 KEYMAP_(MAIN), \
1120 KEYMAP_(DIFF), \
1121 KEYMAP_(LOG), \
1122 KEYMAP_(TREE), \
1123 KEYMAP_(BLOB), \
1124 KEYMAP_(BLAME), \
1125 KEYMAP_(PAGER), \
1126 KEYMAP_(HELP), \
1127 KEYMAP_(STATUS), \
1128 KEYMAP_(STAGE)
1130 enum keymap {
1131 #define KEYMAP_(name) KEYMAP_##name
1132 KEYMAP_INFO
1133 #undef KEYMAP_
1134 };
1136 static struct enum_map keymap_table[] = {
1137 #define KEYMAP_(name) ENUM_MAP(#name, KEYMAP_##name)
1138 KEYMAP_INFO
1139 #undef KEYMAP_
1140 };
1142 #define set_keymap(map, name) map_enum(map, keymap_table, name)
1144 struct keybinding_table {
1145 struct keybinding *data;
1146 size_t size;
1147 };
1149 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
1151 static void
1152 add_keybinding(enum keymap keymap, enum request request, int key)
1153 {
1154 struct keybinding_table *table = &keybindings[keymap];
1156 table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
1157 if (!table->data)
1158 die("Failed to allocate keybinding");
1159 table->data[table->size].alias = key;
1160 table->data[table->size++].request = request;
1161 }
1163 /* Looks for a key binding first in the given map, then in the generic map, and
1164 * lastly in the default keybindings. */
1165 static enum request
1166 get_keybinding(enum keymap keymap, int key)
1167 {
1168 size_t i;
1170 for (i = 0; i < keybindings[keymap].size; i++)
1171 if (keybindings[keymap].data[i].alias == key)
1172 return keybindings[keymap].data[i].request;
1174 for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
1175 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
1176 return keybindings[KEYMAP_GENERIC].data[i].request;
1178 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
1179 if (default_keybindings[i].alias == key)
1180 return default_keybindings[i].request;
1182 return (enum request) key;
1183 }
1186 struct key {
1187 const char *name;
1188 int value;
1189 };
1191 static struct key key_table[] = {
1192 { "Enter", KEY_RETURN },
1193 { "Space", ' ' },
1194 { "Backspace", KEY_BACKSPACE },
1195 { "Tab", KEY_TAB },
1196 { "Escape", KEY_ESC },
1197 { "Left", KEY_LEFT },
1198 { "Right", KEY_RIGHT },
1199 { "Up", KEY_UP },
1200 { "Down", KEY_DOWN },
1201 { "Insert", KEY_IC },
1202 { "Delete", KEY_DC },
1203 { "Hash", '#' },
1204 { "Home", KEY_HOME },
1205 { "End", KEY_END },
1206 { "PageUp", KEY_PPAGE },
1207 { "PageDown", KEY_NPAGE },
1208 { "F1", KEY_F(1) },
1209 { "F2", KEY_F(2) },
1210 { "F3", KEY_F(3) },
1211 { "F4", KEY_F(4) },
1212 { "F5", KEY_F(5) },
1213 { "F6", KEY_F(6) },
1214 { "F7", KEY_F(7) },
1215 { "F8", KEY_F(8) },
1216 { "F9", KEY_F(9) },
1217 { "F10", KEY_F(10) },
1218 { "F11", KEY_F(11) },
1219 { "F12", KEY_F(12) },
1220 };
1222 static int
1223 get_key_value(const char *name)
1224 {
1225 int i;
1227 for (i = 0; i < ARRAY_SIZE(key_table); i++)
1228 if (!strcasecmp(key_table[i].name, name))
1229 return key_table[i].value;
1231 if (strlen(name) == 1 && isprint(*name))
1232 return (int) *name;
1234 return ERR;
1235 }
1237 static const char *
1238 get_key_name(int key_value)
1239 {
1240 static char key_char[] = "'X'";
1241 const char *seq = NULL;
1242 int key;
1244 for (key = 0; key < ARRAY_SIZE(key_table); key++)
1245 if (key_table[key].value == key_value)
1246 seq = key_table[key].name;
1248 if (seq == NULL &&
1249 key_value < 127 &&
1250 isprint(key_value)) {
1251 key_char[1] = (char) key_value;
1252 seq = key_char;
1253 }
1255 return seq ? seq : "(no key)";
1256 }
1258 static const char *
1259 get_key(enum request request)
1260 {
1261 static char buf[BUFSIZ];
1262 size_t pos = 0;
1263 char *sep = "";
1264 int i;
1266 buf[pos] = 0;
1268 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
1269 struct keybinding *keybinding = &default_keybindings[i];
1271 if (keybinding->request != request)
1272 continue;
1274 if (!string_format_from(buf, &pos, "%s%s", sep,
1275 get_key_name(keybinding->alias)))
1276 return "Too many keybindings!";
1277 sep = ", ";
1278 }
1280 return buf;
1281 }
1283 struct run_request {
1284 enum keymap keymap;
1285 int key;
1286 const char *argv[SIZEOF_ARG];
1287 };
1289 static struct run_request *run_request;
1290 static size_t run_requests;
1292 static enum request
1293 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
1294 {
1295 struct run_request *req;
1297 if (argc >= ARRAY_SIZE(req->argv) - 1)
1298 return REQ_NONE;
1300 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1301 if (!req)
1302 return REQ_NONE;
1304 run_request = req;
1305 req = &run_request[run_requests];
1306 req->keymap = keymap;
1307 req->key = key;
1308 req->argv[0] = NULL;
1310 if (!format_argv(req->argv, argv, FORMAT_NONE))
1311 return REQ_NONE;
1313 return REQ_NONE + ++run_requests;
1314 }
1316 static struct run_request *
1317 get_run_request(enum request request)
1318 {
1319 if (request <= REQ_NONE)
1320 return NULL;
1321 return &run_request[request - REQ_NONE - 1];
1322 }
1324 static void
1325 add_builtin_run_requests(void)
1326 {
1327 const char *cherry_pick[] = { "git", "cherry-pick", "%(commit)", NULL };
1328 const char *gc[] = { "git", "gc", NULL };
1329 struct {
1330 enum keymap keymap;
1331 int key;
1332 int argc;
1333 const char **argv;
1334 } reqs[] = {
1335 { KEYMAP_MAIN, 'C', ARRAY_SIZE(cherry_pick) - 1, cherry_pick },
1336 { KEYMAP_GENERIC, 'G', ARRAY_SIZE(gc) - 1, gc },
1337 };
1338 int i;
1340 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1341 enum request req;
1343 req = add_run_request(reqs[i].keymap, reqs[i].key, reqs[i].argc, reqs[i].argv);
1344 if (req != REQ_NONE)
1345 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1346 }
1347 }
1349 /*
1350 * User config file handling.
1351 */
1353 static int config_lineno;
1354 static bool config_errors;
1355 static const char *config_msg;
1357 static struct enum_map color_map[] = {
1358 #define COLOR_MAP(name) ENUM_MAP(#name, COLOR_##name)
1359 COLOR_MAP(DEFAULT),
1360 COLOR_MAP(BLACK),
1361 COLOR_MAP(BLUE),
1362 COLOR_MAP(CYAN),
1363 COLOR_MAP(GREEN),
1364 COLOR_MAP(MAGENTA),
1365 COLOR_MAP(RED),
1366 COLOR_MAP(WHITE),
1367 COLOR_MAP(YELLOW),
1368 };
1370 static struct enum_map attr_map[] = {
1371 #define ATTR_MAP(name) ENUM_MAP(#name, A_##name)
1372 ATTR_MAP(NORMAL),
1373 ATTR_MAP(BLINK),
1374 ATTR_MAP(BOLD),
1375 ATTR_MAP(DIM),
1376 ATTR_MAP(REVERSE),
1377 ATTR_MAP(STANDOUT),
1378 ATTR_MAP(UNDERLINE),
1379 };
1381 #define set_attribute(attr, name) map_enum(attr, attr_map, name)
1383 static int
1384 parse_int(int *opt, const char *arg, int min, int max)
1385 {
1386 int value = atoi(arg);
1388 if (min <= value && value <= max) {
1389 *opt = value;
1390 return OK;
1391 }
1393 config_msg = "Integer value out of bound";
1394 return ERR;
1395 }
1397 static bool
1398 set_color(int *color, const char *name)
1399 {
1400 if (map_enum(color, color_map, name))
1401 return TRUE;
1402 if (!prefixcmp(name, "color"))
1403 return parse_int(color, name + 5, 0, 255) == OK;
1404 return FALSE;
1405 }
1407 /* Wants: object fgcolor bgcolor [attribute] */
1408 static int
1409 option_color_command(int argc, const char *argv[])
1410 {
1411 struct line_info *info;
1413 if (argc != 3 && argc != 4) {
1414 config_msg = "Wrong number of arguments given to color command";
1415 return ERR;
1416 }
1418 info = get_line_info(argv[0]);
1419 if (!info) {
1420 static struct enum_map obsolete[] = {
1421 ENUM_MAP("main-delim", LINE_DELIMITER),
1422 ENUM_MAP("main-date", LINE_DATE),
1423 ENUM_MAP("main-author", LINE_AUTHOR),
1424 };
1425 int index;
1427 if (!map_enum(&index, obsolete, argv[0])) {
1428 config_msg = "Unknown color name";
1429 return ERR;
1430 }
1431 info = &line_info[index];
1432 }
1434 if (!set_color(&info->fg, argv[1]) ||
1435 !set_color(&info->bg, argv[2])) {
1436 config_msg = "Unknown color";
1437 return ERR;
1438 }
1440 if (argc == 4 && !set_attribute(&info->attr, argv[3])) {
1441 config_msg = "Unknown attribute";
1442 return ERR;
1443 }
1445 return OK;
1446 }
1448 static int parse_bool(bool *opt, const char *arg)
1449 {
1450 *opt = (!strcmp(arg, "1") || !strcmp(arg, "true") || !strcmp(arg, "yes"))
1451 ? TRUE : FALSE;
1452 return OK;
1453 }
1455 static int
1456 parse_string(char *opt, const char *arg, size_t optsize)
1457 {
1458 int arglen = strlen(arg);
1460 switch (arg[0]) {
1461 case '\"':
1462 case '\'':
1463 if (arglen == 1 || arg[arglen - 1] != arg[0]) {
1464 config_msg = "Unmatched quotation";
1465 return ERR;
1466 }
1467 arg += 1; arglen -= 2;
1468 default:
1469 string_ncopy_do(opt, optsize, arg, strlen(arg));
1470 return OK;
1471 }
1472 }
1474 /* Wants: name = value */
1475 static int
1476 option_set_command(int argc, const char *argv[])
1477 {
1478 if (argc != 3) {
1479 config_msg = "Wrong number of arguments given to set command";
1480 return ERR;
1481 }
1483 if (strcmp(argv[1], "=")) {
1484 config_msg = "No value assigned";
1485 return ERR;
1486 }
1488 if (!strcmp(argv[0], "show-author"))
1489 return parse_bool(&opt_author, argv[2]);
1491 if (!strcmp(argv[0], "show-date"))
1492 return parse_bool(&opt_date, argv[2]);
1494 if (!strcmp(argv[0], "show-rev-graph"))
1495 return parse_bool(&opt_rev_graph, argv[2]);
1497 if (!strcmp(argv[0], "show-refs"))
1498 return parse_bool(&opt_show_refs, argv[2]);
1500 if (!strcmp(argv[0], "show-line-numbers"))
1501 return parse_bool(&opt_line_number, argv[2]);
1503 if (!strcmp(argv[0], "line-graphics"))
1504 return parse_bool(&opt_line_graphics, argv[2]);
1506 if (!strcmp(argv[0], "line-number-interval"))
1507 return parse_int(&opt_num_interval, argv[2], 1, 1024);
1509 if (!strcmp(argv[0], "author-width"))
1510 return parse_int(&opt_author_cols, argv[2], 0, 1024);
1512 if (!strcmp(argv[0], "tab-size"))
1513 return parse_int(&opt_tab_size, argv[2], 1, 1024);
1515 if (!strcmp(argv[0], "commit-encoding"))
1516 return parse_string(opt_encoding, argv[2], sizeof(opt_encoding));
1518 config_msg = "Unknown variable name";
1519 return ERR;
1520 }
1522 /* Wants: mode request key */
1523 static int
1524 option_bind_command(int argc, const char *argv[])
1525 {
1526 enum request request;
1527 int keymap;
1528 int key;
1530 if (argc < 3) {
1531 config_msg = "Wrong number of arguments given to bind command";
1532 return ERR;
1533 }
1535 if (set_keymap(&keymap, argv[0]) == ERR) {
1536 config_msg = "Unknown key map";
1537 return ERR;
1538 }
1540 key = get_key_value(argv[1]);
1541 if (key == ERR) {
1542 config_msg = "Unknown key";
1543 return ERR;
1544 }
1546 request = get_request(argv[2]);
1547 if (request == REQ_NONE) {
1548 static struct enum_map obsolete[] = {
1549 ENUM_MAP("cherry-pick", REQ_NONE),
1550 ENUM_MAP("screen-resize", REQ_NONE),
1551 ENUM_MAP("tree-parent", REQ_PARENT),
1552 };
1553 int alias;
1555 if (map_enum(&alias, obsolete, argv[2])) {
1556 if (alias != REQ_NONE)
1557 add_keybinding(keymap, alias, key);
1558 config_msg = "Obsolete request name";
1559 return ERR;
1560 }
1561 }
1562 if (request == REQ_NONE && *argv[2]++ == '!')
1563 request = add_run_request(keymap, key, argc - 2, argv + 2);
1564 if (request == REQ_NONE) {
1565 config_msg = "Unknown request name";
1566 return ERR;
1567 }
1569 add_keybinding(keymap, request, key);
1571 return OK;
1572 }
1574 static int
1575 set_option(const char *opt, char *value)
1576 {
1577 const char *argv[SIZEOF_ARG];
1578 int argc = 0;
1580 if (!argv_from_string(argv, &argc, value)) {
1581 config_msg = "Too many option arguments";
1582 return ERR;
1583 }
1585 if (!strcmp(opt, "color"))
1586 return option_color_command(argc, argv);
1588 if (!strcmp(opt, "set"))
1589 return option_set_command(argc, argv);
1591 if (!strcmp(opt, "bind"))
1592 return option_bind_command(argc, argv);
1594 config_msg = "Unknown option command";
1595 return ERR;
1596 }
1598 static int
1599 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1600 {
1601 int status = OK;
1603 config_lineno++;
1604 config_msg = "Internal error";
1606 /* Check for comment markers, since read_properties() will
1607 * only ensure opt and value are split at first " \t". */
1608 optlen = strcspn(opt, "#");
1609 if (optlen == 0)
1610 return OK;
1612 if (opt[optlen] != 0) {
1613 config_msg = "No option value";
1614 status = ERR;
1616 } else {
1617 /* Look for comment endings in the value. */
1618 size_t len = strcspn(value, "#");
1620 if (len < valuelen) {
1621 valuelen = len;
1622 value[valuelen] = 0;
1623 }
1625 status = set_option(opt, value);
1626 }
1628 if (status == ERR) {
1629 warn("Error on line %d, near '%.*s': %s",
1630 config_lineno, (int) optlen, opt, config_msg);
1631 config_errors = TRUE;
1632 }
1634 /* Always keep going if errors are encountered. */
1635 return OK;
1636 }
1638 static void
1639 load_option_file(const char *path)
1640 {
1641 struct io io = {};
1643 /* It's OK that the file doesn't exist. */
1644 if (!io_open(&io, path))
1645 return;
1647 config_lineno = 0;
1648 config_errors = FALSE;
1650 if (io_load(&io, " \t", read_option) == ERR ||
1651 config_errors == TRUE)
1652 warn("Errors while loading %s.", path);
1653 }
1655 static int
1656 load_options(void)
1657 {
1658 const char *home = getenv("HOME");
1659 const char *tigrc_user = getenv("TIGRC_USER");
1660 const char *tigrc_system = getenv("TIGRC_SYSTEM");
1661 char buf[SIZEOF_STR];
1663 add_builtin_run_requests();
1665 if (!tigrc_system)
1666 tigrc_system = SYSCONFDIR "/tigrc";
1667 load_option_file(tigrc_system);
1669 if (!tigrc_user) {
1670 if (!home || !string_format(buf, "%s/.tigrc", home))
1671 return ERR;
1672 tigrc_user = buf;
1673 }
1674 load_option_file(tigrc_user);
1676 return OK;
1677 }
1680 /*
1681 * The viewer
1682 */
1684 struct view;
1685 struct view_ops;
1687 /* The display array of active views and the index of the current view. */
1688 static struct view *display[2];
1689 static unsigned int current_view;
1691 #define foreach_displayed_view(view, i) \
1692 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1694 #define displayed_views() (display[1] != NULL ? 2 : 1)
1696 /* Current head and commit ID */
1697 static char ref_blob[SIZEOF_REF] = "";
1698 static char ref_commit[SIZEOF_REF] = "HEAD";
1699 static char ref_head[SIZEOF_REF] = "HEAD";
1701 struct view {
1702 const char *name; /* View name */
1703 const char *cmd_env; /* Command line set via environment */
1704 const char *id; /* Points to either of ref_{head,commit,blob} */
1706 struct view_ops *ops; /* View operations */
1708 enum keymap keymap; /* What keymap does this view have */
1709 bool git_dir; /* Whether the view requires a git directory. */
1711 char ref[SIZEOF_REF]; /* Hovered commit reference */
1712 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1714 int height, width; /* The width and height of the main window */
1715 WINDOW *win; /* The main window */
1716 WINDOW *title; /* The title window living below the main window */
1718 /* Navigation */
1719 unsigned long offset; /* Offset of the window top */
1720 unsigned long yoffset; /* Offset from the window side. */
1721 unsigned long lineno; /* Current line number */
1722 unsigned long p_offset; /* Previous offset of the window top */
1723 unsigned long p_yoffset;/* Previous offset from the window side */
1724 unsigned long p_lineno; /* Previous current line number */
1725 bool p_restore; /* Should the previous position be restored. */
1727 /* Searching */
1728 char grep[SIZEOF_STR]; /* Search string */
1729 regex_t *regex; /* Pre-compiled regexp */
1731 /* If non-NULL, points to the view that opened this view. If this view
1732 * is closed tig will switch back to the parent view. */
1733 struct view *parent;
1735 /* Buffering */
1736 size_t lines; /* Total number of lines */
1737 struct line *line; /* Line index */
1738 size_t line_alloc; /* Total number of allocated lines */
1739 unsigned int digits; /* Number of digits in the lines member. */
1741 /* Drawing */
1742 struct line *curline; /* Line currently being drawn. */
1743 enum line_type curtype; /* Attribute currently used for drawing. */
1744 unsigned long col; /* Column when drawing. */
1745 bool has_scrolled; /* View was scrolled. */
1746 bool can_hscroll; /* View can be scrolled horizontally. */
1748 /* Loading */
1749 struct io io;
1750 struct io *pipe;
1751 time_t start_time;
1752 time_t update_secs;
1753 };
1755 struct view_ops {
1756 /* What type of content being displayed. Used in the title bar. */
1757 const char *type;
1758 /* Default command arguments. */
1759 const char **argv;
1760 /* Open and reads in all view content. */
1761 bool (*open)(struct view *view);
1762 /* Read one line; updates view->line. */
1763 bool (*read)(struct view *view, char *data);
1764 /* Draw one line; @lineno must be < view->height. */
1765 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1766 /* Depending on view handle a special requests. */
1767 enum request (*request)(struct view *view, enum request request, struct line *line);
1768 /* Search for regexp in a line. */
1769 bool (*grep)(struct view *view, struct line *line);
1770 /* Select line */
1771 void (*select)(struct view *view, struct line *line);
1772 };
1774 static struct view_ops blame_ops;
1775 static struct view_ops blob_ops;
1776 static struct view_ops diff_ops;
1777 static struct view_ops help_ops;
1778 static struct view_ops log_ops;
1779 static struct view_ops main_ops;
1780 static struct view_ops pager_ops;
1781 static struct view_ops stage_ops;
1782 static struct view_ops status_ops;
1783 static struct view_ops tree_ops;
1785 #define VIEW_STR(name, env, ref, ops, map, git) \
1786 { name, #env, ref, ops, map, git }
1788 #define VIEW_(id, name, ops, git, ref) \
1789 VIEW_STR(name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1792 static struct view views[] = {
1793 VIEW_(MAIN, "main", &main_ops, TRUE, ref_head),
1794 VIEW_(DIFF, "diff", &diff_ops, TRUE, ref_commit),
1795 VIEW_(LOG, "log", &log_ops, TRUE, ref_head),
1796 VIEW_(TREE, "tree", &tree_ops, TRUE, ref_commit),
1797 VIEW_(BLOB, "blob", &blob_ops, TRUE, ref_blob),
1798 VIEW_(BLAME, "blame", &blame_ops, TRUE, ref_commit),
1799 VIEW_(HELP, "help", &help_ops, FALSE, ""),
1800 VIEW_(PAGER, "pager", &pager_ops, FALSE, "stdin"),
1801 VIEW_(STATUS, "status", &status_ops, TRUE, ""),
1802 VIEW_(STAGE, "stage", &stage_ops, TRUE, ""),
1803 };
1805 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1806 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1808 #define foreach_view(view, i) \
1809 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1811 #define view_is_displayed(view) \
1812 (view == display[0] || view == display[1])
1815 enum line_graphic {
1816 LINE_GRAPHIC_VLINE
1817 };
1819 static int line_graphics[] = {
1820 /* LINE_GRAPHIC_VLINE: */ '|'
1821 };
1823 static inline void
1824 set_view_attr(struct view *view, enum line_type type)
1825 {
1826 if (!view->curline->selected && view->curtype != type) {
1827 wattrset(view->win, get_line_attr(type));
1828 wchgat(view->win, -1, 0, type, NULL);
1829 view->curtype = type;
1830 }
1831 }
1833 static int
1834 draw_chars(struct view *view, enum line_type type, const char *string,
1835 int max_len, bool use_tilde)
1836 {
1837 int len = 0;
1838 int col = 0;
1839 int trimmed = FALSE;
1840 size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1842 if (max_len <= 0)
1843 return 0;
1845 if (opt_utf8) {
1846 len = utf8_length(&string, skip, &col, max_len, &trimmed, use_tilde);
1847 } else {
1848 col = len = strlen(string);
1849 if (len > max_len) {
1850 if (use_tilde) {
1851 max_len -= 1;
1852 }
1853 col = len = max_len;
1854 trimmed = TRUE;
1855 }
1856 }
1858 set_view_attr(view, type);
1859 if (len > 0)
1860 waddnstr(view->win, string, len);
1861 if (trimmed && use_tilde) {
1862 set_view_attr(view, LINE_DELIMITER);
1863 waddch(view->win, '~');
1864 col++;
1865 }
1867 if (view->col + col >= view->width + view->yoffset)
1868 view->can_hscroll = TRUE;
1870 return col;
1871 }
1873 static int
1874 draw_space(struct view *view, enum line_type type, int max, int spaces)
1875 {
1876 static char space[] = " ";
1877 int col = 0;
1879 spaces = MIN(max, spaces);
1881 while (spaces > 0) {
1882 int len = MIN(spaces, sizeof(space) - 1);
1884 col += draw_chars(view, type, space, spaces, FALSE);
1885 spaces -= len;
1886 }
1888 return col;
1889 }
1891 static bool
1892 draw_lineno(struct view *view, unsigned int lineno)
1893 {
1894 size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1895 char number[10];
1896 int digits3 = view->digits < 3 ? 3 : view->digits;
1897 int max_number = MIN(digits3, STRING_SIZE(number));
1898 int max = view->width - view->col;
1899 int col;
1901 if (max < max_number)
1902 max_number = max;
1904 lineno += view->offset + 1;
1905 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1906 static char fmt[] = "%1ld";
1908 if (view->digits <= 9)
1909 fmt[1] = '0' + digits3;
1911 if (!string_format(number, fmt, lineno))
1912 number[0] = 0;
1913 col = draw_chars(view, LINE_LINE_NUMBER, number, max_number, TRUE);
1914 } else {
1915 col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
1916 }
1918 if (col < max && skip <= col) {
1919 set_view_attr(view, LINE_DEFAULT);
1920 waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
1921 }
1922 col++;
1924 view->col += col;
1925 if (col < max && skip <= col)
1926 col = draw_space(view, LINE_DEFAULT, max - col, 1);
1927 view->col++;
1929 return view->width + view->yoffset <= view->col;
1930 }
1932 static bool
1933 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1934 {
1935 view->col += draw_chars(view, type, string, view->width + view->yoffset - view->col, trim);
1936 return view->width - view->col <= 0;
1937 }
1939 static bool
1940 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1941 {
1942 size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1943 int max = view->width - view->col;
1944 int i;
1946 if (max < size)
1947 size = max;
1949 set_view_attr(view, type);
1950 /* Using waddch() instead of waddnstr() ensures that
1951 * they'll be rendered correctly for the cursor line. */
1952 for (i = skip; i < size; i++)
1953 waddch(view->win, graphic[i]);
1955 view->col += size;
1956 if (size < max && skip <= size)
1957 waddch(view->win, ' ');
1958 view->col++;
1960 return view->width - view->col <= 0;
1961 }
1963 static bool
1964 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1965 {
1966 int max = MIN(view->width - view->col, len);
1967 int col;
1969 if (text)
1970 col = draw_chars(view, type, text, max - 1, trim);
1971 else
1972 col = draw_space(view, type, max - 1, max - 1);
1974 view->col += col;
1975 view->col += draw_space(view, LINE_DEFAULT, max - col, max - col);
1976 return view->width + view->yoffset <= view->col;
1977 }
1979 static bool
1980 draw_date(struct view *view, struct tm *time)
1981 {
1982 char buf[DATE_COLS];
1983 char *date;
1984 int timelen = 0;
1986 if (time)
1987 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
1988 date = timelen ? buf : NULL;
1990 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
1991 }
1993 static bool
1994 draw_author(struct view *view, const char *author)
1995 {
1996 bool trim = opt_author_cols == 0 || opt_author_cols > 5 || !author;
1998 if (!trim) {
1999 static char initials[10];
2000 size_t pos;
2002 #define is_initial_sep(c) (isspace(c) || ispunct(c) || (c) == '@')
2004 memset(initials, 0, sizeof(initials));
2005 for (pos = 0; *author && pos < opt_author_cols - 1; author++, pos++) {
2006 while (is_initial_sep(*author))
2007 author++;
2008 strncpy(&initials[pos], author, sizeof(initials) - 1 - pos);
2009 while (*author && !is_initial_sep(author[1]))
2010 author++;
2011 }
2013 author = initials;
2014 }
2016 return draw_field(view, LINE_AUTHOR, author, opt_author_cols, trim);
2017 }
2019 static bool
2020 draw_mode(struct view *view, mode_t mode)
2021 {
2022 static const char dir_mode[] = "drwxr-xr-x";
2023 static const char link_mode[] = "lrwxrwxrwx";
2024 static const char exe_mode[] = "-rwxr-xr-x";
2025 static const char file_mode[] = "-rw-r--r--";
2026 const char *str;
2028 if (S_ISDIR(mode))
2029 str = dir_mode;
2030 else if (S_ISLNK(mode))
2031 str = link_mode;
2032 else if (mode & S_IXUSR)
2033 str = exe_mode;
2034 else
2035 str = file_mode;
2037 return draw_field(view, LINE_MODE, str, sizeof(file_mode), FALSE);
2038 }
2040 static bool
2041 draw_view_line(struct view *view, unsigned int lineno)
2042 {
2043 struct line *line;
2044 bool selected = (view->offset + lineno == view->lineno);
2046 assert(view_is_displayed(view));
2048 if (view->offset + lineno >= view->lines)
2049 return FALSE;
2051 line = &view->line[view->offset + lineno];
2053 wmove(view->win, lineno, 0);
2054 if (line->cleareol)
2055 wclrtoeol(view->win);
2056 view->col = 0;
2057 view->curline = line;
2058 view->curtype = LINE_NONE;
2059 line->selected = FALSE;
2060 line->dirty = line->cleareol = 0;
2062 if (selected) {
2063 set_view_attr(view, LINE_CURSOR);
2064 line->selected = TRUE;
2065 view->ops->select(view, line);
2066 }
2068 return view->ops->draw(view, line, lineno);
2069 }
2071 static void
2072 redraw_view_dirty(struct view *view)
2073 {
2074 bool dirty = FALSE;
2075 int lineno;
2077 for (lineno = 0; lineno < view->height; lineno++) {
2078 if (view->offset + lineno >= view->lines)
2079 break;
2080 if (!view->line[view->offset + lineno].dirty)
2081 continue;
2082 dirty = TRUE;
2083 if (!draw_view_line(view, lineno))
2084 break;
2085 }
2087 if (!dirty)
2088 return;
2089 wnoutrefresh(view->win);
2090 }
2092 static void
2093 redraw_view_from(struct view *view, int lineno)
2094 {
2095 assert(0 <= lineno && lineno < view->height);
2097 if (lineno == 0)
2098 view->can_hscroll = FALSE;
2100 for (; lineno < view->height; lineno++) {
2101 if (!draw_view_line(view, lineno))
2102 break;
2103 }
2105 wnoutrefresh(view->win);
2106 }
2108 static void
2109 redraw_view(struct view *view)
2110 {
2111 werase(view->win);
2112 redraw_view_from(view, 0);
2113 }
2116 static void
2117 update_view_title(struct view *view)
2118 {
2119 char buf[SIZEOF_STR];
2120 char state[SIZEOF_STR];
2121 size_t bufpos = 0, statelen = 0;
2123 assert(view_is_displayed(view));
2125 if (view != VIEW(REQ_VIEW_STATUS) && view->lines) {
2126 unsigned int view_lines = view->offset + view->height;
2127 unsigned int lines = view->lines
2128 ? MIN(view_lines, view->lines) * 100 / view->lines
2129 : 0;
2131 string_format_from(state, &statelen, " - %s %d of %d (%d%%)",
2132 view->ops->type,
2133 view->lineno + 1,
2134 view->lines,
2135 lines);
2137 }
2139 if (view->pipe) {
2140 time_t secs = time(NULL) - view->start_time;
2142 /* Three git seconds are a long time ... */
2143 if (secs > 2)
2144 string_format_from(state, &statelen, " loading %lds", secs);
2145 }
2147 string_format_from(buf, &bufpos, "[%s]", view->name);
2148 if (*view->ref && bufpos < view->width) {
2149 size_t refsize = strlen(view->ref);
2150 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
2152 if (minsize < view->width)
2153 refsize = view->width - minsize + 7;
2154 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
2155 }
2157 if (statelen && bufpos < view->width) {
2158 string_format_from(buf, &bufpos, "%s", state);
2159 }
2161 if (view == display[current_view])
2162 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
2163 else
2164 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
2166 mvwaddnstr(view->title, 0, 0, buf, bufpos);
2167 wclrtoeol(view->title);
2168 wnoutrefresh(view->title);
2169 }
2171 static void
2172 resize_display(void)
2173 {
2174 int offset, i;
2175 struct view *base = display[0];
2176 struct view *view = display[1] ? display[1] : display[0];
2178 /* Setup window dimensions */
2180 getmaxyx(stdscr, base->height, base->width);
2182 /* Make room for the status window. */
2183 base->height -= 1;
2185 if (view != base) {
2186 /* Horizontal split. */
2187 view->width = base->width;
2188 view->height = SCALE_SPLIT_VIEW(base->height);
2189 base->height -= view->height;
2191 /* Make room for the title bar. */
2192 view->height -= 1;
2193 }
2195 /* Make room for the title bar. */
2196 base->height -= 1;
2198 offset = 0;
2200 foreach_displayed_view (view, i) {
2201 if (!view->win) {
2202 view->win = newwin(view->height, 0, offset, 0);
2203 if (!view->win)
2204 die("Failed to create %s view", view->name);
2206 scrollok(view->win, FALSE);
2208 view->title = newwin(1, 0, offset + view->height, 0);
2209 if (!view->title)
2210 die("Failed to create title window");
2212 } else {
2213 wresize(view->win, view->height, view->width);
2214 mvwin(view->win, offset, 0);
2215 mvwin(view->title, offset + view->height, 0);
2216 }
2218 offset += view->height + 1;
2219 }
2220 }
2222 static void
2223 redraw_display(bool clear)
2224 {
2225 struct view *view;
2226 int i;
2228 foreach_displayed_view (view, i) {
2229 if (clear)
2230 wclear(view->win);
2231 redraw_view(view);
2232 update_view_title(view);
2233 }
2234 }
2236 static void
2237 toggle_view_option(bool *option, const char *help)
2238 {
2239 *option = !*option;
2240 redraw_display(FALSE);
2241 report("%sabling %s", *option ? "En" : "Dis", help);
2242 }
2244 /*
2245 * Navigation
2246 */
2248 static bool
2249 goto_view_line(struct view *view, unsigned long offset, unsigned long lineno)
2250 {
2251 if (lineno >= view->lines)
2252 lineno = view->lines > 0 ? view->lines - 1 : 0;
2254 if (offset > lineno || offset + view->height <= lineno) {
2255 unsigned long half = view->height / 2;
2257 if (lineno > half)
2258 offset = lineno - half;
2259 else
2260 offset = 0;
2261 }
2263 if (offset != view->offset || lineno != view->lineno) {
2264 view->offset = offset;
2265 view->lineno = lineno;
2266 return TRUE;
2267 }
2269 return FALSE;
2270 }
2272 /* Scrolling backend */
2273 static void
2274 do_scroll_view(struct view *view, int lines)
2275 {
2276 bool redraw_current_line = FALSE;
2278 /* The rendering expects the new offset. */
2279 view->offset += lines;
2281 assert(0 <= view->offset && view->offset < view->lines);
2282 assert(lines);
2284 /* Move current line into the view. */
2285 if (view->lineno < view->offset) {
2286 view->lineno = view->offset;
2287 redraw_current_line = TRUE;
2288 } else if (view->lineno >= view->offset + view->height) {
2289 view->lineno = view->offset + view->height - 1;
2290 redraw_current_line = TRUE;
2291 }
2293 assert(view->offset <= view->lineno && view->lineno < view->lines);
2295 /* Redraw the whole screen if scrolling is pointless. */
2296 if (view->height < ABS(lines)) {
2297 redraw_view(view);
2299 } else {
2300 int line = lines > 0 ? view->height - lines : 0;
2301 int end = line + ABS(lines);
2303 scrollok(view->win, TRUE);
2304 wscrl(view->win, lines);
2305 scrollok(view->win, FALSE);
2307 while (line < end && draw_view_line(view, line))
2308 line++;
2310 if (redraw_current_line)
2311 draw_view_line(view, view->lineno - view->offset);
2312 wnoutrefresh(view->win);
2313 }
2315 view->has_scrolled = TRUE;
2316 report("");
2317 }
2319 /* Scroll frontend */
2320 static void
2321 scroll_view(struct view *view, enum request request)
2322 {
2323 int lines = 1;
2325 assert(view_is_displayed(view));
2327 switch (request) {
2328 case REQ_SCROLL_LEFT:
2329 if (view->yoffset == 0) {
2330 report("Cannot scroll beyond the first column");
2331 return;
2332 }
2333 if (view->yoffset <= SCROLL_INTERVAL)
2334 view->yoffset = 0;
2335 else
2336 view->yoffset -= SCROLL_INTERVAL;
2337 redraw_view_from(view, 0);
2338 report("");
2339 return;
2340 case REQ_SCROLL_RIGHT:
2341 if (!view->can_hscroll) {
2342 report("Cannot scroll beyond the last column");
2343 return;
2344 }
2345 view->yoffset += SCROLL_INTERVAL;
2346 redraw_view(view);
2347 report("");
2348 return;
2349 case REQ_SCROLL_PAGE_DOWN:
2350 lines = view->height;
2351 case REQ_SCROLL_LINE_DOWN:
2352 if (view->offset + lines > view->lines)
2353 lines = view->lines - view->offset;
2355 if (lines == 0 || view->offset + view->height >= view->lines) {
2356 report("Cannot scroll beyond the last line");
2357 return;
2358 }
2359 break;
2361 case REQ_SCROLL_PAGE_UP:
2362 lines = view->height;
2363 case REQ_SCROLL_LINE_UP:
2364 if (lines > view->offset)
2365 lines = view->offset;
2367 if (lines == 0) {
2368 report("Cannot scroll beyond the first line");
2369 return;
2370 }
2372 lines = -lines;
2373 break;
2375 default:
2376 die("request %d not handled in switch", request);
2377 }
2379 do_scroll_view(view, lines);
2380 }
2382 /* Cursor moving */
2383 static void
2384 move_view(struct view *view, enum request request)
2385 {
2386 int scroll_steps = 0;
2387 int steps;
2389 switch (request) {
2390 case REQ_MOVE_FIRST_LINE:
2391 steps = -view->lineno;
2392 break;
2394 case REQ_MOVE_LAST_LINE:
2395 steps = view->lines - view->lineno - 1;
2396 break;
2398 case REQ_MOVE_PAGE_UP:
2399 steps = view->height > view->lineno
2400 ? -view->lineno : -view->height;
2401 break;
2403 case REQ_MOVE_PAGE_DOWN:
2404 steps = view->lineno + view->height >= view->lines
2405 ? view->lines - view->lineno - 1 : view->height;
2406 break;
2408 case REQ_MOVE_UP:
2409 steps = -1;
2410 break;
2412 case REQ_MOVE_DOWN:
2413 steps = 1;
2414 break;
2416 default:
2417 die("request %d not handled in switch", request);
2418 }
2420 if (steps <= 0 && view->lineno == 0) {
2421 report("Cannot move beyond the first line");
2422 return;
2424 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2425 report("Cannot move beyond the last line");
2426 return;
2427 }
2429 /* Move the current line */
2430 view->lineno += steps;
2431 assert(0 <= view->lineno && view->lineno < view->lines);
2433 /* Check whether the view needs to be scrolled */
2434 if (view->lineno < view->offset ||
2435 view->lineno >= view->offset + view->height) {
2436 scroll_steps = steps;
2437 if (steps < 0 && -steps > view->offset) {
2438 scroll_steps = -view->offset;
2440 } else if (steps > 0) {
2441 if (view->lineno == view->lines - 1 &&
2442 view->lines > view->height) {
2443 scroll_steps = view->lines - view->offset - 1;
2444 if (scroll_steps >= view->height)
2445 scroll_steps -= view->height - 1;
2446 }
2447 }
2448 }
2450 if (!view_is_displayed(view)) {
2451 view->offset += scroll_steps;
2452 assert(0 <= view->offset && view->offset < view->lines);
2453 view->ops->select(view, &view->line[view->lineno]);
2454 return;
2455 }
2457 /* Repaint the old "current" line if we be scrolling */
2458 if (ABS(steps) < view->height)
2459 draw_view_line(view, view->lineno - steps - view->offset);
2461 if (scroll_steps) {
2462 do_scroll_view(view, scroll_steps);
2463 return;
2464 }
2466 /* Draw the current line */
2467 draw_view_line(view, view->lineno - view->offset);
2469 wnoutrefresh(view->win);
2470 report("");
2471 }
2474 /*
2475 * Searching
2476 */
2478 static void search_view(struct view *view, enum request request);
2480 static void
2481 select_view_line(struct view *view, unsigned long lineno)
2482 {
2483 unsigned long old_lineno = view->lineno;
2484 unsigned long old_offset = view->offset;
2486 if (goto_view_line(view, view->offset, lineno)) {
2487 if (view_is_displayed(view)) {
2488 if (old_offset != view->offset) {
2489 redraw_view(view);
2490 } else {
2491 draw_view_line(view, old_lineno - view->offset);
2492 draw_view_line(view, view->lineno - view->offset);
2493 wnoutrefresh(view->win);
2494 }
2495 } else {
2496 view->ops->select(view, &view->line[view->lineno]);
2497 }
2498 }
2499 }
2501 static void
2502 find_next(struct view *view, enum request request)
2503 {
2504 unsigned long lineno = view->lineno;
2505 int direction;
2507 if (!*view->grep) {
2508 if (!*opt_search)
2509 report("No previous search");
2510 else
2511 search_view(view, request);
2512 return;
2513 }
2515 switch (request) {
2516 case REQ_SEARCH:
2517 case REQ_FIND_NEXT:
2518 direction = 1;
2519 break;
2521 case REQ_SEARCH_BACK:
2522 case REQ_FIND_PREV:
2523 direction = -1;
2524 break;
2526 default:
2527 return;
2528 }
2530 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2531 lineno += direction;
2533 /* Note, lineno is unsigned long so will wrap around in which case it
2534 * will become bigger than view->lines. */
2535 for (; lineno < view->lines; lineno += direction) {
2536 if (view->ops->grep(view, &view->line[lineno])) {
2537 select_view_line(view, lineno);
2538 report("Line %ld matches '%s'", lineno + 1, view->grep);
2539 return;
2540 }
2541 }
2543 report("No match found for '%s'", view->grep);
2544 }
2546 static void
2547 search_view(struct view *view, enum request request)
2548 {
2549 int regex_err;
2551 if (view->regex) {
2552 regfree(view->regex);
2553 *view->grep = 0;
2554 } else {
2555 view->regex = calloc(1, sizeof(*view->regex));
2556 if (!view->regex)
2557 return;
2558 }
2560 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2561 if (regex_err != 0) {
2562 char buf[SIZEOF_STR] = "unknown error";
2564 regerror(regex_err, view->regex, buf, sizeof(buf));
2565 report("Search failed: %s", buf);
2566 return;
2567 }
2569 string_copy(view->grep, opt_search);
2571 find_next(view, request);
2572 }
2574 /*
2575 * Incremental updating
2576 */
2578 static void
2579 reset_view(struct view *view)
2580 {
2581 int i;
2583 for (i = 0; i < view->lines; i++)
2584 free(view->line[i].data);
2585 free(view->line);
2587 view->p_offset = view->offset;
2588 view->p_yoffset = view->yoffset;
2589 view->p_lineno = view->lineno;
2591 view->line = NULL;
2592 view->offset = 0;
2593 view->yoffset = 0;
2594 view->lines = 0;
2595 view->lineno = 0;
2596 view->line_alloc = 0;
2597 view->vid[0] = 0;
2598 view->update_secs = 0;
2599 }
2601 static void
2602 free_argv(const char *argv[])
2603 {
2604 int argc;
2606 for (argc = 0; argv[argc]; argc++)
2607 free((void *) argv[argc]);
2608 }
2610 static bool
2611 format_argv(const char *dst_argv[], const char *src_argv[], enum format_flags flags)
2612 {
2613 char buf[SIZEOF_STR];
2614 int argc;
2615 bool noreplace = flags == FORMAT_NONE;
2617 free_argv(dst_argv);
2619 for (argc = 0; src_argv[argc]; argc++) {
2620 const char *arg = src_argv[argc];
2621 size_t bufpos = 0;
2623 while (arg) {
2624 char *next = strstr(arg, "%(");
2625 int len = next - arg;
2626 const char *value;
2628 if (!next || noreplace) {
2629 if (flags == FORMAT_DASH && !strcmp(arg, "--"))
2630 noreplace = TRUE;
2631 len = strlen(arg);
2632 value = "";
2634 } else if (!prefixcmp(next, "%(directory)")) {
2635 value = opt_path;
2637 } else if (!prefixcmp(next, "%(file)")) {
2638 value = opt_file;
2640 } else if (!prefixcmp(next, "%(ref)")) {
2641 value = *opt_ref ? opt_ref : "HEAD";
2643 } else if (!prefixcmp(next, "%(head)")) {
2644 value = ref_head;
2646 } else if (!prefixcmp(next, "%(commit)")) {
2647 value = ref_commit;
2649 } else if (!prefixcmp(next, "%(blob)")) {
2650 value = ref_blob;
2652 } else {
2653 report("Unknown replacement: `%s`", next);
2654 return FALSE;
2655 }
2657 if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2658 return FALSE;
2660 arg = next && !noreplace ? strchr(next, ')') + 1 : NULL;
2661 }
2663 dst_argv[argc] = strdup(buf);
2664 if (!dst_argv[argc])
2665 break;
2666 }
2668 dst_argv[argc] = NULL;
2670 return src_argv[argc] == NULL;
2671 }
2673 static bool
2674 restore_view_position(struct view *view)
2675 {
2676 if (!view->p_restore || (view->pipe && view->lines <= view->p_lineno))
2677 return FALSE;
2679 /* Changing the view position cancels the restoring. */
2680 /* FIXME: Changing back to the first line is not detected. */
2681 if (view->offset != 0 || view->lineno != 0) {
2682 view->p_restore = FALSE;
2683 return FALSE;
2684 }
2686 if (goto_view_line(view, view->p_offset, view->p_lineno) &&
2687 view_is_displayed(view))
2688 werase(view->win);
2690 view->yoffset = view->p_yoffset;
2691 view->p_restore = FALSE;
2693 return TRUE;
2694 }
2696 static void
2697 end_update(struct view *view, bool force)
2698 {
2699 if (!view->pipe)
2700 return;
2701 while (!view->ops->read(view, NULL))
2702 if (!force)
2703 return;
2704 set_nonblocking_input(FALSE);
2705 if (force)
2706 kill_io(view->pipe);
2707 done_io(view->pipe);
2708 view->pipe = NULL;
2709 }
2711 static void
2712 setup_update(struct view *view, const char *vid)
2713 {
2714 set_nonblocking_input(TRUE);
2715 reset_view(view);
2716 string_copy_rev(view->vid, vid);
2717 view->pipe = &view->io;
2718 view->start_time = time(NULL);
2719 }
2721 static bool
2722 prepare_update(struct view *view, const char *argv[], const char *dir,
2723 enum format_flags flags)
2724 {
2725 if (view->pipe)
2726 end_update(view, TRUE);
2727 return init_io_rd(&view->io, argv, dir, flags);
2728 }
2730 static bool
2731 prepare_update_file(struct view *view, const char *name)
2732 {
2733 if (view->pipe)
2734 end_update(view, TRUE);
2735 return io_open(&view->io, name);
2736 }
2738 static bool
2739 begin_update(struct view *view, bool refresh)
2740 {
2741 if (view->pipe)
2742 end_update(view, TRUE);
2744 if (refresh) {
2745 if (!start_io(&view->io))
2746 return FALSE;
2748 } else {
2749 if (view == VIEW(REQ_VIEW_TREE) && strcmp(view->vid, view->id))
2750 opt_path[0] = 0;
2752 if (!run_io_rd(&view->io, view->ops->argv, FORMAT_ALL))
2753 return FALSE;
2755 /* Put the current ref_* value to the view title ref
2756 * member. This is needed by the blob view. Most other
2757 * views sets it automatically after loading because the
2758 * first line is a commit line. */
2759 string_copy_rev(view->ref, view->id);
2760 }
2762 setup_update(view, view->id);
2764 return TRUE;
2765 }
2767 #define ITEM_CHUNK_SIZE 256
2768 static void *
2769 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2770 {
2771 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2772 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2774 if (mem == NULL || num_chunks != num_chunks_new) {
2775 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2776 mem = realloc(mem, *size * item_size);
2777 }
2779 return mem;
2780 }
2782 static struct line *
2783 realloc_lines(struct view *view, size_t line_size)
2784 {
2785 size_t alloc = view->line_alloc;
2786 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2787 sizeof(*view->line));
2789 if (!tmp)
2790 return NULL;
2792 view->line = tmp;
2793 view->line_alloc = alloc;
2794 return view->line;
2795 }
2797 static bool
2798 update_view(struct view *view)
2799 {
2800 char out_buffer[BUFSIZ * 2];
2801 char *line;
2802 /* Clear the view and redraw everything since the tree sorting
2803 * might have rearranged things. */
2804 bool redraw = view->lines == 0;
2805 bool can_read = TRUE;
2807 if (!view->pipe)
2808 return TRUE;
2810 if (!io_can_read(view->pipe)) {
2811 if (view->lines == 0) {
2812 time_t secs = time(NULL) - view->start_time;
2814 if (secs > 1 && secs > view->update_secs) {
2815 if (view->update_secs == 0)
2816 redraw_view(view);
2817 update_view_title(view);
2818 view->update_secs = secs;
2819 }
2820 }
2821 return TRUE;
2822 }
2824 for (; (line = io_get(view->pipe, '\n', can_read)); can_read = FALSE) {
2825 if (opt_iconv != ICONV_NONE) {
2826 ICONV_CONST char *inbuf = line;
2827 size_t inlen = strlen(line) + 1;
2829 char *outbuf = out_buffer;
2830 size_t outlen = sizeof(out_buffer);
2832 size_t ret;
2834 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2835 if (ret != (size_t) -1)
2836 line = out_buffer;
2837 }
2839 if (!view->ops->read(view, line)) {
2840 report("Allocation failure");
2841 end_update(view, TRUE);
2842 return FALSE;
2843 }
2844 }
2846 {
2847 unsigned long lines = view->lines;
2848 int digits;
2850 for (digits = 0; lines; digits++)
2851 lines /= 10;
2853 /* Keep the displayed view in sync with line number scaling. */
2854 if (digits != view->digits) {
2855 view->digits = digits;
2856 if (opt_line_number || view == VIEW(REQ_VIEW_BLAME))
2857 redraw = TRUE;
2858 }
2859 }
2861 if (io_error(view->pipe)) {
2862 report("Failed to read: %s", io_strerror(view->pipe));
2863 end_update(view, TRUE);
2865 } else if (io_eof(view->pipe)) {
2866 report("");
2867 end_update(view, FALSE);
2868 }
2870 if (restore_view_position(view))
2871 redraw = TRUE;
2873 if (!view_is_displayed(view))
2874 return TRUE;
2876 if (redraw)
2877 redraw_view_from(view, 0);
2878 else
2879 redraw_view_dirty(view);
2881 /* Update the title _after_ the redraw so that if the redraw picks up a
2882 * commit reference in view->ref it'll be available here. */
2883 update_view_title(view);
2884 return TRUE;
2885 }
2887 static struct line *
2888 add_line_data(struct view *view, void *data, enum line_type type)
2889 {
2890 struct line *line;
2892 if (!realloc_lines(view, view->lines + 1))
2893 return NULL;
2895 line = &view->line[view->lines++];
2896 memset(line, 0, sizeof(*line));
2897 line->type = type;
2898 line->data = data;
2899 line->dirty = 1;
2901 return line;
2902 }
2904 static struct line *
2905 add_line_text(struct view *view, const char *text, enum line_type type)
2906 {
2907 char *data = text ? strdup(text) : NULL;
2909 return data ? add_line_data(view, data, type) : NULL;
2910 }
2912 static struct line *
2913 add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
2914 {
2915 char buf[SIZEOF_STR];
2916 va_list args;
2918 va_start(args, fmt);
2919 if (vsnprintf(buf, sizeof(buf), fmt, args) >= sizeof(buf))
2920 buf[0] = 0;
2921 va_end(args);
2923 return buf[0] ? add_line_text(view, buf, type) : NULL;
2924 }
2926 /*
2927 * View opening
2928 */
2930 enum open_flags {
2931 OPEN_DEFAULT = 0, /* Use default view switching. */
2932 OPEN_SPLIT = 1, /* Split current view. */
2933 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2934 OPEN_REFRESH = 16, /* Refresh view using previous command. */
2935 OPEN_PREPARED = 32, /* Open already prepared command. */
2936 };
2938 static void
2939 open_view(struct view *prev, enum request request, enum open_flags flags)
2940 {
2941 bool split = !!(flags & OPEN_SPLIT);
2942 bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
2943 bool nomaximize = !!(flags & OPEN_REFRESH);
2944 struct view *view = VIEW(request);
2945 int nviews = displayed_views();
2946 struct view *base_view = display[0];
2948 if (view == prev && nviews == 1 && !reload) {
2949 report("Already in %s view", view->name);
2950 return;
2951 }
2953 if (view->git_dir && !opt_git_dir[0]) {
2954 report("The %s view is disabled in pager view", view->name);
2955 return;
2956 }
2958 if (split) {
2959 display[1] = view;
2960 current_view = 1;
2961 } else if (!nomaximize) {
2962 /* Maximize the current view. */
2963 memset(display, 0, sizeof(display));
2964 current_view = 0;
2965 display[current_view] = view;
2966 }
2968 /* Resize the view when switching between split- and full-screen,
2969 * or when switching between two different full-screen views. */
2970 if (nviews != displayed_views() ||
2971 (nviews == 1 && base_view != display[0]))
2972 resize_display();
2974 if (view->ops->open) {
2975 if (view->pipe)
2976 end_update(view, TRUE);
2977 if (!view->ops->open(view)) {
2978 report("Failed to load %s view", view->name);
2979 return;
2980 }
2981 restore_view_position(view);
2983 } else if ((reload || strcmp(view->vid, view->id)) &&
2984 !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
2985 report("Failed to load %s view", view->name);
2986 return;
2987 }
2989 if (split && prev->lineno - prev->offset >= prev->height) {
2990 /* Take the title line into account. */
2991 int lines = prev->lineno - prev->offset - prev->height + 1;
2993 /* Scroll the view that was split if the current line is
2994 * outside the new limited view. */
2995 do_scroll_view(prev, lines);
2996 }
2998 if (prev && view != prev) {
2999 if (split) {
3000 /* "Blur" the previous view. */
3001 update_view_title(prev);
3002 }
3004 view->parent = prev;
3005 }
3007 if (view->pipe && view->lines == 0) {
3008 /* Clear the old view and let the incremental updating refill
3009 * the screen. */
3010 werase(view->win);
3011 view->p_restore = flags & (OPEN_RELOAD | OPEN_REFRESH);
3012 report("");
3013 } else if (view_is_displayed(view)) {
3014 redraw_view(view);
3015 report("");
3016 }
3017 }
3019 static void
3020 open_external_viewer(const char *argv[], const char *dir)
3021 {
3022 def_prog_mode(); /* save current tty modes */
3023 endwin(); /* restore original tty modes */
3024 run_io_fg(argv, dir);
3025 fprintf(stderr, "Press Enter to continue");
3026 getc(opt_tty);
3027 reset_prog_mode();
3028 redraw_display(TRUE);
3029 }
3031 static void
3032 open_mergetool(const char *file)
3033 {
3034 const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
3036 open_external_viewer(mergetool_argv, opt_cdup);
3037 }
3039 static void
3040 open_editor(bool from_root, const char *file)
3041 {
3042 const char *editor_argv[] = { "vi", file, NULL };
3043 const char *editor;
3045 editor = getenv("GIT_EDITOR");
3046 if (!editor && *opt_editor)
3047 editor = opt_editor;
3048 if (!editor)
3049 editor = getenv("VISUAL");
3050 if (!editor)
3051 editor = getenv("EDITOR");
3052 if (!editor)
3053 editor = "vi";
3055 editor_argv[0] = editor;
3056 open_external_viewer(editor_argv, from_root ? opt_cdup : NULL);
3057 }
3059 static void
3060 open_run_request(enum request request)
3061 {
3062 struct run_request *req = get_run_request(request);
3063 const char *argv[ARRAY_SIZE(req->argv)] = { NULL };
3065 if (!req) {
3066 report("Unknown run request");
3067 return;
3068 }
3070 if (format_argv(argv, req->argv, FORMAT_ALL))
3071 open_external_viewer(argv, NULL);
3072 free_argv(argv);
3073 }
3075 /*
3076 * User request switch noodle
3077 */
3079 static int
3080 view_driver(struct view *view, enum request request)
3081 {
3082 int i;
3084 if (request == REQ_NONE) {
3085 doupdate();
3086 return TRUE;
3087 }
3089 if (request > REQ_NONE) {
3090 open_run_request(request);
3091 /* FIXME: When all views can refresh always do this. */
3092 if (view == VIEW(REQ_VIEW_STATUS) ||
3093 view == VIEW(REQ_VIEW_MAIN) ||
3094 view == VIEW(REQ_VIEW_LOG) ||
3095 view == VIEW(REQ_VIEW_STAGE))
3096 request = REQ_REFRESH;
3097 else
3098 return TRUE;
3099 }
3101 if (view && view->lines) {
3102 request = view->ops->request(view, request, &view->line[view->lineno]);
3103 if (request == REQ_NONE)
3104 return TRUE;
3105 }
3107 switch (request) {
3108 case REQ_MOVE_UP:
3109 case REQ_MOVE_DOWN:
3110 case REQ_MOVE_PAGE_UP:
3111 case REQ_MOVE_PAGE_DOWN:
3112 case REQ_MOVE_FIRST_LINE:
3113 case REQ_MOVE_LAST_LINE:
3114 move_view(view, request);
3115 break;
3117 case REQ_SCROLL_LEFT:
3118 case REQ_SCROLL_RIGHT:
3119 case REQ_SCROLL_LINE_DOWN:
3120 case REQ_SCROLL_LINE_UP:
3121 case REQ_SCROLL_PAGE_DOWN:
3122 case REQ_SCROLL_PAGE_UP:
3123 scroll_view(view, request);
3124 break;
3126 case REQ_VIEW_BLAME:
3127 if (!opt_file[0]) {
3128 report("No file chosen, press %s to open tree view",
3129 get_key(REQ_VIEW_TREE));
3130 break;
3131 }
3132 open_view(view, request, OPEN_DEFAULT);
3133 break;
3135 case REQ_VIEW_BLOB:
3136 if (!ref_blob[0]) {
3137 report("No file chosen, press %s to open tree view",
3138 get_key(REQ_VIEW_TREE));
3139 break;
3140 }
3141 open_view(view, request, OPEN_DEFAULT);
3142 break;
3144 case REQ_VIEW_PAGER:
3145 if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
3146 report("No pager content, press %s to run command from prompt",
3147 get_key(REQ_PROMPT));
3148 break;
3149 }
3150 open_view(view, request, OPEN_DEFAULT);
3151 break;
3153 case REQ_VIEW_STAGE:
3154 if (!VIEW(REQ_VIEW_STAGE)->lines) {
3155 report("No stage content, press %s to open the status view and choose file",
3156 get_key(REQ_VIEW_STATUS));
3157 break;
3158 }
3159 open_view(view, request, OPEN_DEFAULT);
3160 break;
3162 case REQ_VIEW_STATUS:
3163 if (opt_is_inside_work_tree == FALSE) {
3164 report("The status view requires a working tree");
3165 break;
3166 }
3167 open_view(view, request, OPEN_DEFAULT);
3168 break;
3170 case REQ_VIEW_MAIN:
3171 case REQ_VIEW_DIFF:
3172 case REQ_VIEW_LOG:
3173 case REQ_VIEW_TREE:
3174 case REQ_VIEW_HELP:
3175 open_view(view, request, OPEN_DEFAULT);
3176 break;
3178 case REQ_NEXT:
3179 case REQ_PREVIOUS:
3180 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
3182 if ((view == VIEW(REQ_VIEW_DIFF) &&
3183 view->parent == VIEW(REQ_VIEW_MAIN)) ||
3184 (view == VIEW(REQ_VIEW_DIFF) &&
3185 view->parent == VIEW(REQ_VIEW_BLAME)) ||
3186 (view == VIEW(REQ_VIEW_STAGE) &&
3187 view->parent == VIEW(REQ_VIEW_STATUS)) ||
3188 (view == VIEW(REQ_VIEW_BLOB) &&
3189 view->parent == VIEW(REQ_VIEW_TREE))) {
3190 int line;
3192 view = view->parent;
3193 line = view->lineno;
3194 move_view(view, request);
3195 if (view_is_displayed(view))
3196 update_view_title(view);
3197 if (line != view->lineno)
3198 view->ops->request(view, REQ_ENTER,
3199 &view->line[view->lineno]);
3201 } else {
3202 move_view(view, request);
3203 }
3204 break;
3206 case REQ_VIEW_NEXT:
3207 {
3208 int nviews = displayed_views();
3209 int next_view = (current_view + 1) % nviews;
3211 if (next_view == current_view) {
3212 report("Only one view is displayed");
3213 break;
3214 }
3216 current_view = next_view;
3217 /* Blur out the title of the previous view. */
3218 update_view_title(view);
3219 report("");
3220 break;
3221 }
3222 case REQ_REFRESH:
3223 report("Refreshing is not yet supported for the %s view", view->name);
3224 break;
3226 case REQ_MAXIMIZE:
3227 if (displayed_views() == 2)
3228 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
3229 break;
3231 case REQ_TOGGLE_LINENO:
3232 toggle_view_option(&opt_line_number, "line numbers");
3233 break;
3235 case REQ_TOGGLE_DATE:
3236 toggle_view_option(&opt_date, "date display");
3237 break;
3239 case REQ_TOGGLE_AUTHOR:
3240 toggle_view_option(&opt_author, "author display");
3241 break;
3243 case REQ_TOGGLE_REV_GRAPH:
3244 toggle_view_option(&opt_rev_graph, "revision graph display");
3245 break;
3247 case REQ_TOGGLE_REFS:
3248 toggle_view_option(&opt_show_refs, "reference display");
3249 break;
3251 case REQ_SEARCH:
3252 case REQ_SEARCH_BACK:
3253 search_view(view, request);
3254 break;
3256 case REQ_FIND_NEXT:
3257 case REQ_FIND_PREV:
3258 find_next(view, request);
3259 break;
3261 case REQ_STOP_LOADING:
3262 for (i = 0; i < ARRAY_SIZE(views); i++) {
3263 view = &views[i];
3264 if (view->pipe)
3265 report("Stopped loading the %s view", view->name),
3266 end_update(view, TRUE);
3267 }
3268 break;
3270 case REQ_SHOW_VERSION:
3271 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3272 return TRUE;
3274 case REQ_SCREEN_REDRAW:
3275 redraw_display(TRUE);
3276 break;
3278 case REQ_EDIT:
3279 report("Nothing to edit");
3280 break;
3282 case REQ_ENTER:
3283 report("Nothing to enter");
3284 break;
3286 case REQ_VIEW_CLOSE:
3287 /* XXX: Mark closed views by letting view->parent point to the
3288 * view itself. Parents to closed view should never be
3289 * followed. */
3290 if (view->parent &&
3291 view->parent->parent != view->parent) {
3292 memset(display, 0, sizeof(display));
3293 current_view = 0;
3294 display[current_view] = view->parent;
3295 view->parent = view;
3296 resize_display();
3297 redraw_display(FALSE);
3298 report("");
3299 break;
3300 }
3301 /* Fall-through */
3302 case REQ_QUIT:
3303 return FALSE;
3305 default:
3306 report("Unknown key, press 'h' for help");
3307 return TRUE;
3308 }
3310 return TRUE;
3311 }
3314 /*
3315 * View backend utilities
3316 */
3318 static void
3319 parse_timezone(time_t *time, const char *zone)
3320 {
3321 long tz;
3323 tz = ('0' - zone[1]) * 60 * 60 * 10;
3324 tz += ('0' - zone[2]) * 60 * 60;
3325 tz += ('0' - zone[3]) * 60;
3326 tz += ('0' - zone[4]);
3328 if (zone[0] == '-')
3329 tz = -tz;
3331 *time -= tz;
3332 }
3334 /* Parse author lines where the name may be empty:
3335 * author <email@address.tld> 1138474660 +0100
3336 */
3337 static void
3338 parse_author_line(char *ident, char *author, size_t authorsize, struct tm *tm)
3339 {
3340 char *nameend = strchr(ident, '<');
3341 char *emailend = strchr(ident, '>');
3343 if (nameend && emailend)
3344 *nameend = *emailend = 0;
3345 ident = chomp_string(ident);
3346 if (!*ident) {
3347 if (nameend)
3348 ident = chomp_string(nameend + 1);
3349 if (!*ident)
3350 ident = "Unknown";
3351 }
3353 string_ncopy_do(author, authorsize, ident, strlen(ident));
3355 /* Parse epoch and timezone */
3356 if (emailend && emailend[1] == ' ') {
3357 char *secs = emailend + 2;
3358 char *zone = strchr(secs, ' ');
3359 time_t time = (time_t) atol(secs);
3361 if (zone && strlen(zone) == STRING_SIZE(" +0700"))
3362 parse_timezone(&time, zone + 1);
3364 gmtime_r(&time, tm);
3365 }
3366 }
3368 static enum input_status
3369 select_commit_parent_handler(void *data, char *buf, int c)
3370 {
3371 size_t parents = *(size_t *) data;
3372 int parent = 0;
3374 if (!isdigit(c))
3375 return INPUT_SKIP;
3377 if (*buf)
3378 parent = atoi(buf) * 10;
3379 parent += c - '0';
3381 if (parent > parents)
3382 return INPUT_SKIP;
3383 return INPUT_OK;
3384 }
3386 static bool
3387 select_commit_parent(const char *id, char rev[SIZEOF_REV])
3388 {
3389 char buf[SIZEOF_STR * 4];
3390 const char *revlist_argv[] = {
3391 "git", "rev-list", "-1", "--parents", id, NULL
3392 };
3393 int parents;
3395 if (!run_io_buf(revlist_argv, buf, sizeof(buf)) ||
3396 !*chomp_string(buf) ||
3397 (parents = (strlen(buf) / 40) - 1) < 0) {
3398 report("Failed to get parent information");
3399 return FALSE;
3401 } else if (parents == 0) {
3402 report("The selected commit has no parents");
3403 return FALSE;
3404 }
3406 if (parents > 1) {
3407 char prompt[SIZEOF_STR];
3408 char *result;
3410 if (!string_format(prompt, "Which parent? [1..%d] ", parents))
3411 return FALSE;
3412 result = prompt_input(prompt, select_commit_parent_handler, &parents);
3413 if (!result)
3414 return FALSE;
3415 parents = atoi(result);
3416 }
3418 string_copy_rev(rev, &buf[41 * parents]);
3419 return TRUE;
3420 }
3422 /*
3423 * Pager backend
3424 */
3426 static bool
3427 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3428 {
3429 char text[SIZEOF_STR];
3431 if (opt_line_number && draw_lineno(view, lineno))
3432 return TRUE;
3434 string_expand(text, sizeof(text), line->data, opt_tab_size);
3435 draw_text(view, line->type, text, TRUE);
3436 return TRUE;
3437 }
3439 static bool
3440 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3441 {
3442 const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3443 char refbuf[SIZEOF_STR];
3444 char *ref = NULL;
3446 if (run_io_buf(describe_argv, refbuf, sizeof(refbuf)))
3447 ref = chomp_string(refbuf);
3449 if (!ref || !*ref)
3450 return TRUE;
3452 /* This is the only fatal call, since it can "corrupt" the buffer. */
3453 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3454 return FALSE;
3456 return TRUE;
3457 }
3459 static void
3460 add_pager_refs(struct view *view, struct line *line)
3461 {
3462 char buf[SIZEOF_STR];
3463 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3464 struct ref **refs;
3465 size_t bufpos = 0, refpos = 0;
3466 const char *sep = "Refs: ";
3467 bool is_tag = FALSE;
3469 assert(line->type == LINE_COMMIT);
3471 refs = get_refs(commit_id);
3472 if (!refs) {
3473 if (view == VIEW(REQ_VIEW_DIFF))
3474 goto try_add_describe_ref;
3475 return;
3476 }
3478 do {
3479 struct ref *ref = refs[refpos];
3480 const char *fmt = ref->tag ? "%s[%s]" :
3481 ref->remote ? "%s<%s>" : "%s%s";
3483 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3484 return;
3485 sep = ", ";
3486 if (ref->tag)
3487 is_tag = TRUE;
3488 } while (refs[refpos++]->next);
3490 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
3491 try_add_describe_ref:
3492 /* Add <tag>-g<commit_id> "fake" reference. */
3493 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3494 return;
3495 }
3497 if (bufpos == 0)
3498 return;
3500 add_line_text(view, buf, LINE_PP_REFS);
3501 }
3503 static bool
3504 pager_read(struct view *view, char *data)
3505 {
3506 struct line *line;
3508 if (!data)
3509 return TRUE;
3511 line = add_line_text(view, data, get_line_type(data));
3512 if (!line)
3513 return FALSE;
3515 if (line->type == LINE_COMMIT &&
3516 (view == VIEW(REQ_VIEW_DIFF) ||
3517 view == VIEW(REQ_VIEW_LOG)))
3518 add_pager_refs(view, line);
3520 return TRUE;
3521 }
3523 static enum request
3524 pager_request(struct view *view, enum request request, struct line *line)
3525 {
3526 int split = 0;
3528 if (request != REQ_ENTER)
3529 return request;
3531 if (line->type == LINE_COMMIT &&
3532 (view == VIEW(REQ_VIEW_LOG) ||
3533 view == VIEW(REQ_VIEW_PAGER))) {
3534 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3535 split = 1;
3536 }
3538 /* Always scroll the view even if it was split. That way
3539 * you can use Enter to scroll through the log view and
3540 * split open each commit diff. */
3541 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3543 /* FIXME: A minor workaround. Scrolling the view will call report("")
3544 * but if we are scrolling a non-current view this won't properly
3545 * update the view title. */
3546 if (split)
3547 update_view_title(view);
3549 return REQ_NONE;
3550 }
3552 static bool
3553 pager_grep(struct view *view, struct line *line)
3554 {
3555 regmatch_t pmatch;
3556 char *text = line->data;
3558 if (!*text)
3559 return FALSE;
3561 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3562 return FALSE;
3564 return TRUE;
3565 }
3567 static void
3568 pager_select(struct view *view, struct line *line)
3569 {
3570 if (line->type == LINE_COMMIT) {
3571 char *text = (char *)line->data + STRING_SIZE("commit ");
3573 if (view != VIEW(REQ_VIEW_PAGER))
3574 string_copy_rev(view->ref, text);
3575 string_copy_rev(ref_commit, text);
3576 }
3577 }
3579 static struct view_ops pager_ops = {
3580 "line",
3581 NULL,
3582 NULL,
3583 pager_read,
3584 pager_draw,
3585 pager_request,
3586 pager_grep,
3587 pager_select,
3588 };
3590 static const char *log_argv[SIZEOF_ARG] = {
3591 "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3592 };
3594 static enum request
3595 log_request(struct view *view, enum request request, struct line *line)
3596 {
3597 switch (request) {
3598 case REQ_REFRESH:
3599 load_refs();
3600 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3601 return REQ_NONE;
3602 default:
3603 return pager_request(view, request, line);
3604 }
3605 }
3607 static struct view_ops log_ops = {
3608 "line",
3609 log_argv,
3610 NULL,
3611 pager_read,
3612 pager_draw,
3613 log_request,
3614 pager_grep,
3615 pager_select,
3616 };
3618 static const char *diff_argv[SIZEOF_ARG] = {
3619 "git", "show", "--pretty=fuller", "--no-color", "--root",
3620 "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
3621 };
3623 static struct view_ops diff_ops = {
3624 "line",
3625 diff_argv,
3626 NULL,
3627 pager_read,
3628 pager_draw,
3629 pager_request,
3630 pager_grep,
3631 pager_select,
3632 };
3634 /*
3635 * Help backend
3636 */
3638 static bool
3639 help_open(struct view *view)
3640 {
3641 char buf[SIZEOF_STR];
3642 size_t bufpos;
3643 int i;
3645 if (view->lines > 0)
3646 return TRUE;
3648 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3650 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3651 const char *key;
3653 if (req_info[i].request == REQ_NONE)
3654 continue;
3656 if (!req_info[i].request) {
3657 add_line_text(view, "", LINE_DEFAULT);
3658 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3659 continue;
3660 }
3662 key = get_key(req_info[i].request);
3663 if (!*key)
3664 key = "(no key defined)";
3666 for (bufpos = 0; bufpos <= req_info[i].namelen; bufpos++) {
3667 buf[bufpos] = tolower(req_info[i].name[bufpos]);
3668 if (buf[bufpos] == '_')
3669 buf[bufpos] = '-';
3670 }
3672 add_line_format(view, LINE_DEFAULT, " %-25s %-20s %s",
3673 key, buf, req_info[i].help);
3674 }
3676 if (run_requests) {
3677 add_line_text(view, "", LINE_DEFAULT);
3678 add_line_text(view, "External commands:", LINE_DEFAULT);
3679 }
3681 for (i = 0; i < run_requests; i++) {
3682 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3683 const char *key;
3684 int argc;
3686 if (!req)
3687 continue;
3689 key = get_key_name(req->key);
3690 if (!*key)
3691 key = "(no key defined)";
3693 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3694 if (!string_format_from(buf, &bufpos, "%s%s",
3695 argc ? " " : "", req->argv[argc]))
3696 return REQ_NONE;
3698 add_line_format(view, LINE_DEFAULT, " %-10s %-14s `%s`",
3699 keymap_table[req->keymap].name, key, buf);
3700 }
3702 return TRUE;
3703 }
3705 static struct view_ops help_ops = {
3706 "line",
3707 NULL,
3708 help_open,
3709 NULL,
3710 pager_draw,
3711 pager_request,
3712 pager_grep,
3713 pager_select,
3714 };
3717 /*
3718 * Tree backend
3719 */
3721 struct tree_stack_entry {
3722 struct tree_stack_entry *prev; /* Entry below this in the stack */
3723 unsigned long lineno; /* Line number to restore */
3724 char *name; /* Position of name in opt_path */
3725 };
3727 /* The top of the path stack. */
3728 static struct tree_stack_entry *tree_stack = NULL;
3729 unsigned long tree_lineno = 0;
3731 static void
3732 pop_tree_stack_entry(void)
3733 {
3734 struct tree_stack_entry *entry = tree_stack;
3736 tree_lineno = entry->lineno;
3737 entry->name[0] = 0;
3738 tree_stack = entry->prev;
3739 free(entry);
3740 }
3742 static void
3743 push_tree_stack_entry(const char *name, unsigned long lineno)
3744 {
3745 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3746 size_t pathlen = strlen(opt_path);
3748 if (!entry)
3749 return;
3751 entry->prev = tree_stack;
3752 entry->name = opt_path + pathlen;
3753 tree_stack = entry;
3755 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3756 pop_tree_stack_entry();
3757 return;
3758 }
3760 /* Move the current line to the first tree entry. */
3761 tree_lineno = 1;
3762 entry->lineno = lineno;
3763 }
3765 /* Parse output from git-ls-tree(1):
3766 *
3767 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3768 */
3770 #define SIZEOF_TREE_ATTR \
3771 STRING_SIZE("100644 blob f931e1d229c3e185caad4449bf5b66ed72462657\t")
3773 #define SIZEOF_TREE_MODE \
3774 STRING_SIZE("100644 ")
3776 #define TREE_ID_OFFSET \
3777 STRING_SIZE("100644 blob ")
3779 struct tree_entry {
3780 char id[SIZEOF_REV];
3781 mode_t mode;
3782 struct tm time; /* Date from the author ident. */
3783 char author[75]; /* Author of the commit. */
3784 char name[1];
3785 };
3787 static const char *
3788 tree_path(struct line *line)
3789 {
3790 return ((struct tree_entry *) line->data)->name;
3791 }
3794 static int
3795 tree_compare_entry(struct line *line1, struct line *line2)
3796 {
3797 if (line1->type != line2->type)
3798 return line1->type == LINE_TREE_DIR ? -1 : 1;
3799 return strcmp(tree_path(line1), tree_path(line2));
3800 }
3802 static struct line *
3803 tree_entry(struct view *view, enum line_type type, const char *path,
3804 const char *mode, const char *id)
3805 {
3806 struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
3807 struct line *line = entry ? add_line_data(view, entry, type) : NULL;
3809 if (!entry || !line) {
3810 free(entry);
3811 return NULL;
3812 }
3814 strncpy(entry->name, path, strlen(path));
3815 if (mode)
3816 entry->mode = strtoul(mode, NULL, 8);
3817 if (id)
3818 string_copy_rev(entry->id, id);
3820 return line;
3821 }
3823 static bool
3824 tree_read_date(struct view *view, char *text, bool *read_date)
3825 {
3826 static char author_name[SIZEOF_STR];
3827 static struct tm author_time;
3829 if (!text && *read_date) {
3830 *read_date = FALSE;
3831 return TRUE;
3833 } else if (!text) {
3834 char *path = *opt_path ? opt_path : ".";
3835 /* Find next entry to process */
3836 const char *log_file[] = {
3837 "git", "log", "--no-color", "--pretty=raw",
3838 "--cc", "--raw", view->id, "--", path, NULL
3839 };
3840 struct io io = {};
3842 if (!view->lines) {
3843 tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL);
3844 report("Tree is empty");
3845 return TRUE;
3846 }
3848 if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
3849 report("Failed to load tree data");
3850 return TRUE;
3851 }
3853 done_io(view->pipe);
3854 view->io = io;
3855 *read_date = TRUE;
3856 return FALSE;
3858 } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
3859 parse_author_line(text + STRING_SIZE("author "),
3860 author_name, sizeof(author_name), &author_time);
3862 } else if (*text == ':') {
3863 char *pos;
3864 size_t annotated = 1;
3865 size_t i;
3867 pos = strchr(text, '\t');
3868 if (!pos)
3869 return TRUE;
3870 text = pos + 1;
3871 if (*opt_prefix && !strncmp(text, opt_prefix, strlen(opt_prefix)))
3872 text += strlen(opt_prefix);
3873 if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
3874 text += strlen(opt_path);
3875 pos = strchr(text, '/');
3876 if (pos)
3877 *pos = 0;
3879 for (i = 1; i < view->lines; i++) {
3880 struct line *line = &view->line[i];
3881 struct tree_entry *entry = line->data;
3883 annotated += !!*entry->author;
3884 if (*entry->author || strcmp(entry->name, text))
3885 continue;
3887 string_copy(entry->author, author_name);
3888 memcpy(&entry->time, &author_time, sizeof(entry->time));
3889 line->dirty = 1;
3890 break;
3891 }
3893 if (annotated == view->lines)
3894 kill_io(view->pipe);
3895 }
3896 return TRUE;
3897 }
3899 static bool
3900 tree_read(struct view *view, char *text)
3901 {
3902 static bool read_date = FALSE;
3903 struct tree_entry *data;
3904 struct line *entry, *line;
3905 enum line_type type;
3906 size_t textlen = text ? strlen(text) : 0;
3907 char *path = text + SIZEOF_TREE_ATTR;
3909 if (read_date || !text)
3910 return tree_read_date(view, text, &read_date);
3912 if (textlen <= SIZEOF_TREE_ATTR)
3913 return FALSE;
3914 if (view->lines == 0 &&
3915 !tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL))
3916 return FALSE;
3918 /* Strip the path part ... */
3919 if (*opt_path) {
3920 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3921 size_t striplen = strlen(opt_path);
3923 if (pathlen > striplen)
3924 memmove(path, path + striplen,
3925 pathlen - striplen + 1);
3927 /* Insert "link" to parent directory. */
3928 if (view->lines == 1 &&
3929 !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
3930 return FALSE;
3931 }
3933 type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
3934 entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
3935 if (!entry)
3936 return FALSE;
3937 data = entry->data;
3939 /* Skip "Directory ..." and ".." line. */
3940 for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
3941 if (tree_compare_entry(line, entry) <= 0)
3942 continue;
3944 memmove(line + 1, line, (entry - line) * sizeof(*entry));
3946 line->data = data;
3947 line->type = type;
3948 for (; line <= entry; line++)
3949 line->dirty = line->cleareol = 1;
3950 return TRUE;
3951 }
3953 if (tree_lineno > view->lineno) {
3954 view->lineno = tree_lineno;
3955 tree_lineno = 0;
3956 }
3958 return TRUE;
3959 }
3961 static bool
3962 tree_draw(struct view *view, struct line *line, unsigned int lineno)
3963 {
3964 struct tree_entry *entry = line->data;
3966 if (line->type == LINE_TREE_HEAD) {
3967 if (draw_text(view, line->type, "Directory path /", TRUE))
3968 return TRUE;
3969 } else {
3970 if (draw_mode(view, entry->mode))
3971 return TRUE;
3973 if (opt_author && draw_author(view, entry->author))
3974 return TRUE;
3976 if (opt_date && draw_date(view, *entry->author ? &entry->time : NULL))
3977 return TRUE;
3978 }
3979 if (draw_text(view, line->type, entry->name, TRUE))
3980 return TRUE;
3981 return TRUE;
3982 }
3984 static void
3985 open_blob_editor()
3986 {
3987 char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
3988 int fd = mkstemp(file);
3990 if (fd == -1)
3991 report("Failed to create temporary file");
3992 else if (!run_io_append(blob_ops.argv, FORMAT_ALL, fd))
3993 report("Failed to save blob data to file");
3994 else
3995 open_editor(FALSE, file);
3996 if (fd != -1)
3997 unlink(file);
3998 }
4000 static enum request
4001 tree_request(struct view *view, enum request request, struct line *line)
4002 {
4003 enum open_flags flags;
4005 switch (request) {
4006 case REQ_VIEW_BLAME:
4007 if (line->type != LINE_TREE_FILE) {
4008 report("Blame only supported for files");
4009 return REQ_NONE;
4010 }
4012 string_copy(opt_ref, view->vid);
4013 return request;
4015 case REQ_EDIT:
4016 if (line->type != LINE_TREE_FILE) {
4017 report("Edit only supported for files");
4018 } else if (!is_head_commit(view->vid)) {
4019 open_blob_editor();
4020 } else {
4021 open_editor(TRUE, opt_file);
4022 }
4023 return REQ_NONE;
4025 case REQ_PARENT:
4026 if (!*opt_path) {
4027 /* quit view if at top of tree */
4028 return REQ_VIEW_CLOSE;
4029 }
4030 /* fake 'cd ..' */
4031 line = &view->line[1];
4032 break;
4034 case REQ_ENTER:
4035 break;
4037 default:
4038 return request;
4039 }
4041 /* Cleanup the stack if the tree view is at a different tree. */
4042 while (!*opt_path && tree_stack)
4043 pop_tree_stack_entry();
4045 switch (line->type) {
4046 case LINE_TREE_DIR:
4047 /* Depending on whether it is a subdirectory or parent link
4048 * mangle the path buffer. */
4049 if (line == &view->line[1] && *opt_path) {
4050 pop_tree_stack_entry();
4052 } else {
4053 const char *basename = tree_path(line);
4055 push_tree_stack_entry(basename, view->lineno);
4056 }
4058 /* Trees and subtrees share the same ID, so they are not not
4059 * unique like blobs. */
4060 flags = OPEN_RELOAD;
4061 request = REQ_VIEW_TREE;
4062 break;
4064 case LINE_TREE_FILE:
4065 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4066 request = REQ_VIEW_BLOB;
4067 break;
4069 default:
4070 return REQ_NONE;
4071 }
4073 open_view(view, request, flags);
4074 if (request == REQ_VIEW_TREE)
4075 view->lineno = tree_lineno;
4077 return REQ_NONE;
4078 }
4080 static void
4081 tree_select(struct view *view, struct line *line)
4082 {
4083 struct tree_entry *entry = line->data;
4085 if (line->type == LINE_TREE_FILE) {
4086 string_copy_rev(ref_blob, entry->id);
4087 string_format(opt_file, "%s%s", opt_path, tree_path(line));
4089 } else if (line->type != LINE_TREE_DIR) {
4090 return;
4091 }
4093 string_copy_rev(view->ref, entry->id);
4094 }
4096 static const char *tree_argv[SIZEOF_ARG] = {
4097 "git", "ls-tree", "%(commit)", "%(directory)", NULL
4098 };
4100 static struct view_ops tree_ops = {
4101 "file",
4102 tree_argv,
4103 NULL,
4104 tree_read,
4105 tree_draw,
4106 tree_request,
4107 pager_grep,
4108 tree_select,
4109 };
4111 static bool
4112 blob_read(struct view *view, char *line)
4113 {
4114 if (!line)
4115 return TRUE;
4116 return add_line_text(view, line, LINE_DEFAULT) != NULL;
4117 }
4119 static enum request
4120 blob_request(struct view *view, enum request request, struct line *line)
4121 {
4122 switch (request) {
4123 case REQ_EDIT:
4124 open_blob_editor();
4125 return REQ_NONE;
4126 default:
4127 return pager_request(view, request, line);
4128 }
4129 }
4131 static const char *blob_argv[SIZEOF_ARG] = {
4132 "git", "cat-file", "blob", "%(blob)", NULL
4133 };
4135 static struct view_ops blob_ops = {
4136 "line",
4137 blob_argv,
4138 NULL,
4139 blob_read,
4140 pager_draw,
4141 blob_request,
4142 pager_grep,
4143 pager_select,
4144 };
4146 /*
4147 * Blame backend
4148 *
4149 * Loading the blame view is a two phase job:
4150 *
4151 * 1. File content is read either using opt_file from the
4152 * filesystem or using git-cat-file.
4153 * 2. Then blame information is incrementally added by
4154 * reading output from git-blame.
4155 */
4157 static const char *blame_head_argv[] = {
4158 "git", "blame", "--incremental", "--", "%(file)", NULL
4159 };
4161 static const char *blame_ref_argv[] = {
4162 "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
4163 };
4165 static const char *blame_cat_file_argv[] = {
4166 "git", "cat-file", "blob", "%(ref):%(file)", NULL
4167 };
4169 struct blame_commit {
4170 char id[SIZEOF_REV]; /* SHA1 ID. */
4171 char title[128]; /* First line of the commit message. */
4172 char author[75]; /* Author of the commit. */
4173 struct tm time; /* Date from the author ident. */
4174 char filename[128]; /* Name of file. */
4175 bool has_previous; /* Was a "previous" line detected. */
4176 };
4178 struct blame {
4179 struct blame_commit *commit;
4180 char text[1];
4181 };
4183 static bool
4184 blame_open(struct view *view)
4185 {
4186 if (*opt_ref || !io_open(&view->io, opt_file)) {
4187 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
4188 return FALSE;
4189 }
4191 setup_update(view, opt_file);
4192 string_format(view->ref, "%s ...", opt_file);
4194 return TRUE;
4195 }
4197 static struct blame_commit *
4198 get_blame_commit(struct view *view, const char *id)
4199 {
4200 size_t i;
4202 for (i = 0; i < view->lines; i++) {
4203 struct blame *blame = view->line[i].data;
4205 if (!blame->commit)
4206 continue;
4208 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4209 return blame->commit;
4210 }
4212 {
4213 struct blame_commit *commit = calloc(1, sizeof(*commit));
4215 if (commit)
4216 string_ncopy(commit->id, id, SIZEOF_REV);
4217 return commit;
4218 }
4219 }
4221 static bool
4222 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4223 {
4224 const char *pos = *posref;
4226 *posref = NULL;
4227 pos = strchr(pos + 1, ' ');
4228 if (!pos || !isdigit(pos[1]))
4229 return FALSE;
4230 *number = atoi(pos + 1);
4231 if (*number < min || *number > max)
4232 return FALSE;
4234 *posref = pos;
4235 return TRUE;
4236 }
4238 static struct blame_commit *
4239 parse_blame_commit(struct view *view, const char *text, int *blamed)
4240 {
4241 struct blame_commit *commit;
4242 struct blame *blame;
4243 const char *pos = text + SIZEOF_REV - 1;
4244 size_t lineno;
4245 size_t group;
4247 if (strlen(text) <= SIZEOF_REV || *pos != ' ')
4248 return NULL;
4250 if (!parse_number(&pos, &lineno, 1, view->lines) ||
4251 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4252 return NULL;
4254 commit = get_blame_commit(view, text);
4255 if (!commit)
4256 return NULL;
4258 *blamed += group;
4259 while (group--) {
4260 struct line *line = &view->line[lineno + group - 1];
4262 blame = line->data;
4263 blame->commit = commit;
4264 line->dirty = 1;
4265 }
4267 return commit;
4268 }
4270 static bool
4271 blame_read_file(struct view *view, const char *line, bool *read_file)
4272 {
4273 if (!line) {
4274 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
4275 struct io io = {};
4277 if (view->lines == 0 && !view->parent)
4278 die("No blame exist for %s", view->vid);
4280 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
4281 report("Failed to load blame data");
4282 return TRUE;
4283 }
4285 done_io(view->pipe);
4286 view->io = io;
4287 *read_file = FALSE;
4288 return FALSE;
4290 } else {
4291 size_t linelen = strlen(line);
4292 struct blame *blame = malloc(sizeof(*blame) + linelen);
4294 if (!blame)
4295 return FALSE;
4297 blame->commit = NULL;
4298 strncpy(blame->text, line, linelen);
4299 blame->text[linelen] = 0;
4300 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4301 }
4302 }
4304 static bool
4305 match_blame_header(const char *name, char **line)
4306 {
4307 size_t namelen = strlen(name);
4308 bool matched = !strncmp(name, *line, namelen);
4310 if (matched)
4311 *line += namelen;
4313 return matched;
4314 }
4316 static bool
4317 blame_read(struct view *view, char *line)
4318 {
4319 static struct blame_commit *commit = NULL;
4320 static int blamed = 0;
4321 static time_t author_time;
4322 static bool read_file = TRUE;
4324 if (read_file)
4325 return blame_read_file(view, line, &read_file);
4327 if (!line) {
4328 /* Reset all! */
4329 commit = NULL;
4330 blamed = 0;
4331 read_file = TRUE;
4332 string_format(view->ref, "%s", view->vid);
4333 if (view_is_displayed(view)) {
4334 update_view_title(view);
4335 redraw_view_from(view, 0);
4336 }
4337 return TRUE;
4338 }
4340 if (!commit) {
4341 commit = parse_blame_commit(view, line, &blamed);
4342 string_format(view->ref, "%s %2d%%", view->vid,
4343 view->lines ? blamed * 100 / view->lines : 0);
4345 } else if (match_blame_header("author ", &line)) {
4346 string_ncopy(commit->author, line, strlen(line));
4348 } else if (match_blame_header("author-time ", &line)) {
4349 author_time = (time_t) atol(line);
4351 } else if (match_blame_header("author-tz ", &line)) {
4352 parse_timezone(&author_time, line);
4353 gmtime_r(&author_time, &commit->time);
4355 } else if (match_blame_header("summary ", &line)) {
4356 string_ncopy(commit->title, line, strlen(line));
4358 } else if (match_blame_header("previous ", &line)) {
4359 commit->has_previous = TRUE;
4361 } else if (match_blame_header("filename ", &line)) {
4362 string_ncopy(commit->filename, line, strlen(line));
4363 commit = NULL;
4364 }
4366 return TRUE;
4367 }
4369 static bool
4370 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4371 {
4372 struct blame *blame = line->data;
4373 struct tm *time = NULL;
4374 const char *id = NULL, *author = NULL;
4375 char text[SIZEOF_STR];
4377 if (blame->commit && *blame->commit->filename) {
4378 id = blame->commit->id;
4379 author = blame->commit->author;
4380 time = &blame->commit->time;
4381 }
4383 if (opt_date && draw_date(view, time))
4384 return TRUE;
4386 if (opt_author && draw_author(view, author))
4387 return TRUE;
4389 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4390 return TRUE;
4392 if (draw_lineno(view, lineno))
4393 return TRUE;
4395 string_expand(text, sizeof(text), blame->text, opt_tab_size);
4396 draw_text(view, LINE_DEFAULT, text, TRUE);
4397 return TRUE;
4398 }
4400 static bool
4401 check_blame_commit(struct blame *blame)
4402 {
4403 if (!blame->commit)
4404 report("Commit data not loaded yet");
4405 else if (!strcmp(blame->commit->id, NULL_ID))
4406 report("No commit exist for the selected line");
4407 else
4408 return TRUE;
4409 return FALSE;
4410 }
4412 static enum request
4413 blame_request(struct view *view, enum request request, struct line *line)
4414 {
4415 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4416 struct blame *blame = line->data;
4418 switch (request) {
4419 case REQ_VIEW_BLAME:
4420 if (check_blame_commit(blame)) {
4421 string_copy(opt_ref, blame->commit->id);
4422 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4423 }
4424 break;
4426 case REQ_PARENT:
4427 if (check_blame_commit(blame) &&
4428 select_commit_parent(blame->commit->id, opt_ref))
4429 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4430 break;
4432 case REQ_ENTER:
4433 if (!blame->commit) {
4434 report("No commit loaded yet");
4435 break;
4436 }
4438 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4439 !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4440 break;
4442 if (!strcmp(blame->commit->id, NULL_ID)) {
4443 struct view *diff = VIEW(REQ_VIEW_DIFF);
4444 const char *diff_index_argv[] = {
4445 "git", "diff-index", "--root", "--patch-with-stat",
4446 "-C", "-M", "HEAD", "--", view->vid, NULL
4447 };
4449 if (!blame->commit->has_previous) {
4450 diff_index_argv[1] = "diff";
4451 diff_index_argv[2] = "--no-color";
4452 diff_index_argv[6] = "--";
4453 diff_index_argv[7] = "/dev/null";
4454 }
4456 if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4457 report("Failed to allocate diff command");
4458 break;
4459 }
4460 flags |= OPEN_PREPARED;
4461 }
4463 open_view(view, REQ_VIEW_DIFF, flags);
4464 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4465 string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4466 break;
4468 default:
4469 return request;
4470 }
4472 return REQ_NONE;
4473 }
4475 static bool
4476 blame_grep(struct view *view, struct line *line)
4477 {
4478 struct blame *blame = line->data;
4479 struct blame_commit *commit = blame->commit;
4480 regmatch_t pmatch;
4482 #define MATCH(text, on) \
4483 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4485 if (commit) {
4486 char buf[DATE_COLS + 1];
4488 if (MATCH(commit->title, 1) ||
4489 MATCH(commit->author, opt_author) ||
4490 MATCH(commit->id, opt_date))
4491 return TRUE;
4493 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
4494 MATCH(buf, 1))
4495 return TRUE;
4496 }
4498 return MATCH(blame->text, 1);
4500 #undef MATCH
4501 }
4503 static void
4504 blame_select(struct view *view, struct line *line)
4505 {
4506 struct blame *blame = line->data;
4507 struct blame_commit *commit = blame->commit;
4509 if (!commit)
4510 return;
4512 if (!strcmp(commit->id, NULL_ID))
4513 string_ncopy(ref_commit, "HEAD", 4);
4514 else
4515 string_copy_rev(ref_commit, commit->id);
4516 }
4518 static struct view_ops blame_ops = {
4519 "line",
4520 NULL,
4521 blame_open,
4522 blame_read,
4523 blame_draw,
4524 blame_request,
4525 blame_grep,
4526 blame_select,
4527 };
4529 /*
4530 * Status backend
4531 */
4533 struct status {
4534 char status;
4535 struct {
4536 mode_t mode;
4537 char rev[SIZEOF_REV];
4538 char name[SIZEOF_STR];
4539 } old;
4540 struct {
4541 mode_t mode;
4542 char rev[SIZEOF_REV];
4543 char name[SIZEOF_STR];
4544 } new;
4545 };
4547 static char status_onbranch[SIZEOF_STR];
4548 static struct status stage_status;
4549 static enum line_type stage_line_type;
4550 static size_t stage_chunks;
4551 static int *stage_chunk;
4553 /* This should work even for the "On branch" line. */
4554 static inline bool
4555 status_has_none(struct view *view, struct line *line)
4556 {
4557 return line < view->line + view->lines && !line[1].data;
4558 }
4560 /* Get fields from the diff line:
4561 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4562 */
4563 static inline bool
4564 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4565 {
4566 const char *old_mode = buf + 1;
4567 const char *new_mode = buf + 8;
4568 const char *old_rev = buf + 15;
4569 const char *new_rev = buf + 56;
4570 const char *status = buf + 97;
4572 if (bufsize < 98 ||
4573 old_mode[-1] != ':' ||
4574 new_mode[-1] != ' ' ||
4575 old_rev[-1] != ' ' ||
4576 new_rev[-1] != ' ' ||
4577 status[-1] != ' ')
4578 return FALSE;
4580 file->status = *status;
4582 string_copy_rev(file->old.rev, old_rev);
4583 string_copy_rev(file->new.rev, new_rev);
4585 file->old.mode = strtoul(old_mode, NULL, 8);
4586 file->new.mode = strtoul(new_mode, NULL, 8);
4588 file->old.name[0] = file->new.name[0] = 0;
4590 return TRUE;
4591 }
4593 static bool
4594 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4595 {
4596 struct status *unmerged = NULL;
4597 char *buf;
4598 struct io io = {};
4600 if (!run_io(&io, argv, NULL, IO_RD))
4601 return FALSE;
4603 add_line_data(view, NULL, type);
4605 while ((buf = io_get(&io, 0, TRUE))) {
4606 struct status *file = unmerged;
4608 if (!file) {
4609 file = calloc(1, sizeof(*file));
4610 if (!file || !add_line_data(view, file, type))
4611 goto error_out;
4612 }
4614 /* Parse diff info part. */
4615 if (status) {
4616 file->status = status;
4617 if (status == 'A')
4618 string_copy(file->old.rev, NULL_ID);
4620 } else if (!file->status || file == unmerged) {
4621 if (!status_get_diff(file, buf, strlen(buf)))
4622 goto error_out;
4624 buf = io_get(&io, 0, TRUE);
4625 if (!buf)
4626 break;
4628 /* Collapse all modified entries that follow an
4629 * associated unmerged entry. */
4630 if (unmerged == file) {
4631 unmerged->status = 'U';
4632 unmerged = NULL;
4633 } else if (file->status == 'U') {
4634 unmerged = file;
4635 }
4636 }
4638 /* Grab the old name for rename/copy. */
4639 if (!*file->old.name &&
4640 (file->status == 'R' || file->status == 'C')) {
4641 string_ncopy(file->old.name, buf, strlen(buf));
4643 buf = io_get(&io, 0, TRUE);
4644 if (!buf)
4645 break;
4646 }
4648 /* git-ls-files just delivers a NUL separated list of
4649 * file names similar to the second half of the
4650 * git-diff-* output. */
4651 string_ncopy(file->new.name, buf, strlen(buf));
4652 if (!*file->old.name)
4653 string_copy(file->old.name, file->new.name);
4654 file = NULL;
4655 }
4657 if (io_error(&io)) {
4658 error_out:
4659 done_io(&io);
4660 return FALSE;
4661 }
4663 if (!view->line[view->lines - 1].data)
4664 add_line_data(view, NULL, LINE_STAT_NONE);
4666 done_io(&io);
4667 return TRUE;
4668 }
4670 /* Don't show unmerged entries in the staged section. */
4671 static const char *status_diff_index_argv[] = {
4672 "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4673 "--cached", "-M", "HEAD", NULL
4674 };
4676 static const char *status_diff_files_argv[] = {
4677 "git", "diff-files", "-z", NULL
4678 };
4680 static const char *status_list_other_argv[] = {
4681 "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
4682 };
4684 static const char *status_list_no_head_argv[] = {
4685 "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4686 };
4688 static const char *update_index_argv[] = {
4689 "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4690 };
4692 /* Restore the previous line number to stay in the context or select a
4693 * line with something that can be updated. */
4694 static void
4695 status_restore(struct view *view)
4696 {
4697 if (view->p_lineno >= view->lines)
4698 view->p_lineno = view->lines - 1;
4699 while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
4700 view->p_lineno++;
4701 while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
4702 view->p_lineno--;
4704 /* If the above fails, always skip the "On branch" line. */
4705 if (view->p_lineno < view->lines)
4706 view->lineno = view->p_lineno;
4707 else
4708 view->lineno = 1;
4710 if (view->lineno < view->offset)
4711 view->offset = view->lineno;
4712 else if (view->offset + view->height <= view->lineno)
4713 view->offset = view->lineno - view->height + 1;
4715 view->p_restore = FALSE;
4716 }
4718 static void
4719 status_update_onbranch(void)
4720 {
4721 static const char *paths[][2] = {
4722 { "rebase-apply/rebasing", "Rebasing" },
4723 { "rebase-apply/applying", "Applying mailbox" },
4724 { "rebase-apply/", "Rebasing mailbox" },
4725 { "rebase-merge/interactive", "Interactive rebase" },
4726 { "rebase-merge/", "Rebase merge" },
4727 { "MERGE_HEAD", "Merging" },
4728 { "BISECT_LOG", "Bisecting" },
4729 { "HEAD", "On branch" },
4730 };
4731 char buf[SIZEOF_STR];
4732 struct stat stat;
4733 int i;
4735 if (is_initial_commit()) {
4736 string_copy(status_onbranch, "Initial commit");
4737 return;
4738 }
4740 for (i = 0; i < ARRAY_SIZE(paths); i++) {
4741 char *head = opt_head;
4743 if (!string_format(buf, "%s/%s", opt_git_dir, paths[i][0]) ||
4744 lstat(buf, &stat) < 0)
4745 continue;
4747 if (!*opt_head) {
4748 struct io io = {};
4750 if (string_format(buf, "%s/rebase-merge/head-name", opt_git_dir) &&
4751 io_open(&io, buf) &&
4752 io_read_buf(&io, buf, sizeof(buf))) {
4753 head = chomp_string(buf);
4754 if (!prefixcmp(head, "refs/heads/"))
4755 head += STRING_SIZE("refs/heads/");
4756 }
4757 }
4759 if (!string_format(status_onbranch, "%s %s", paths[i][1], head))
4760 string_copy(status_onbranch, opt_head);
4761 return;
4762 }
4764 string_copy(status_onbranch, "Not currently on any branch");
4765 }
4767 /* First parse staged info using git-diff-index(1), then parse unstaged
4768 * info using git-diff-files(1), and finally untracked files using
4769 * git-ls-files(1). */
4770 static bool
4771 status_open(struct view *view)
4772 {
4773 reset_view(view);
4775 add_line_data(view, NULL, LINE_STAT_HEAD);
4776 status_update_onbranch();
4778 run_io_bg(update_index_argv);
4780 if (is_initial_commit()) {
4781 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4782 return FALSE;
4783 } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4784 return FALSE;
4785 }
4787 if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4788 !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4789 return FALSE;
4791 /* Restore the exact position or use the specialized restore
4792 * mode? */
4793 if (!view->p_restore)
4794 status_restore(view);
4795 return TRUE;
4796 }
4798 static bool
4799 status_draw(struct view *view, struct line *line, unsigned int lineno)
4800 {
4801 struct status *status = line->data;
4802 enum line_type type;
4803 const char *text;
4805 if (!status) {
4806 switch (line->type) {
4807 case LINE_STAT_STAGED:
4808 type = LINE_STAT_SECTION;
4809 text = "Changes to be committed:";
4810 break;
4812 case LINE_STAT_UNSTAGED:
4813 type = LINE_STAT_SECTION;
4814 text = "Changed but not updated:";
4815 break;
4817 case LINE_STAT_UNTRACKED:
4818 type = LINE_STAT_SECTION;
4819 text = "Untracked files:";
4820 break;
4822 case LINE_STAT_NONE:
4823 type = LINE_DEFAULT;
4824 text = " (no files)";
4825 break;
4827 case LINE_STAT_HEAD:
4828 type = LINE_STAT_HEAD;
4829 text = status_onbranch;
4830 break;
4832 default:
4833 return FALSE;
4834 }
4835 } else {
4836 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4838 buf[0] = status->status;
4839 if (draw_text(view, line->type, buf, TRUE))
4840 return TRUE;
4841 type = LINE_DEFAULT;
4842 text = status->new.name;
4843 }
4845 draw_text(view, type, text, TRUE);
4846 return TRUE;
4847 }
4849 static enum request
4850 status_enter(struct view *view, struct line *line)
4851 {
4852 struct status *status = line->data;
4853 const char *oldpath = status ? status->old.name : NULL;
4854 /* Diffs for unmerged entries are empty when passing the new
4855 * path, so leave it empty. */
4856 const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
4857 const char *info;
4858 enum open_flags split;
4859 struct view *stage = VIEW(REQ_VIEW_STAGE);
4861 if (line->type == LINE_STAT_NONE ||
4862 (!status && line[1].type == LINE_STAT_NONE)) {
4863 report("No file to diff");
4864 return REQ_NONE;
4865 }
4867 switch (line->type) {
4868 case LINE_STAT_STAGED:
4869 if (is_initial_commit()) {
4870 const char *no_head_diff_argv[] = {
4871 "git", "diff", "--no-color", "--patch-with-stat",
4872 "--", "/dev/null", newpath, NULL
4873 };
4875 if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
4876 return REQ_QUIT;
4877 } else {
4878 const char *index_show_argv[] = {
4879 "git", "diff-index", "--root", "--patch-with-stat",
4880 "-C", "-M", "--cached", "HEAD", "--",
4881 oldpath, newpath, NULL
4882 };
4884 if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
4885 return REQ_QUIT;
4886 }
4888 if (status)
4889 info = "Staged changes to %s";
4890 else
4891 info = "Staged changes";
4892 break;
4894 case LINE_STAT_UNSTAGED:
4895 {
4896 const char *files_show_argv[] = {
4897 "git", "diff-files", "--root", "--patch-with-stat",
4898 "-C", "-M", "--", oldpath, newpath, NULL
4899 };
4901 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
4902 return REQ_QUIT;
4903 if (status)
4904 info = "Unstaged changes to %s";
4905 else
4906 info = "Unstaged changes";
4907 break;
4908 }
4909 case LINE_STAT_UNTRACKED:
4910 if (!newpath) {
4911 report("No file to show");
4912 return REQ_NONE;
4913 }
4915 if (!suffixcmp(status->new.name, -1, "/")) {
4916 report("Cannot display a directory");
4917 return REQ_NONE;
4918 }
4920 if (!prepare_update_file(stage, newpath))
4921 return REQ_QUIT;
4922 info = "Untracked file %s";
4923 break;
4925 case LINE_STAT_HEAD:
4926 return REQ_NONE;
4928 default:
4929 die("line type %d not handled in switch", line->type);
4930 }
4932 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4933 open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
4934 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4935 if (status) {
4936 stage_status = *status;
4937 } else {
4938 memset(&stage_status, 0, sizeof(stage_status));
4939 }
4941 stage_line_type = line->type;
4942 stage_chunks = 0;
4943 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4944 }
4946 return REQ_NONE;
4947 }
4949 static bool
4950 status_exists(struct status *status, enum line_type type)
4951 {
4952 struct view *view = VIEW(REQ_VIEW_STATUS);
4953 unsigned long lineno;
4955 for (lineno = 0; lineno < view->lines; lineno++) {
4956 struct line *line = &view->line[lineno];
4957 struct status *pos = line->data;
4959 if (line->type != type)
4960 continue;
4961 if (!pos && (!status || !status->status) && line[1].data) {
4962 select_view_line(view, lineno);
4963 return TRUE;
4964 }
4965 if (pos && !strcmp(status->new.name, pos->new.name)) {
4966 select_view_line(view, lineno);
4967 return TRUE;
4968 }
4969 }
4971 return FALSE;
4972 }
4975 static bool
4976 status_update_prepare(struct io *io, enum line_type type)
4977 {
4978 const char *staged_argv[] = {
4979 "git", "update-index", "-z", "--index-info", NULL
4980 };
4981 const char *others_argv[] = {
4982 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
4983 };
4985 switch (type) {
4986 case LINE_STAT_STAGED:
4987 return run_io(io, staged_argv, opt_cdup, IO_WR);
4989 case LINE_STAT_UNSTAGED:
4990 return run_io(io, others_argv, opt_cdup, IO_WR);
4992 case LINE_STAT_UNTRACKED:
4993 return run_io(io, others_argv, NULL, IO_WR);
4995 default:
4996 die("line type %d not handled in switch", type);
4997 return FALSE;
4998 }
4999 }
5001 static bool
5002 status_update_write(struct io *io, struct status *status, enum line_type type)
5003 {
5004 char buf[SIZEOF_STR];
5005 size_t bufsize = 0;
5007 switch (type) {
5008 case LINE_STAT_STAGED:
5009 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
5010 status->old.mode,
5011 status->old.rev,
5012 status->old.name, 0))
5013 return FALSE;
5014 break;
5016 case LINE_STAT_UNSTAGED:
5017 case LINE_STAT_UNTRACKED:
5018 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
5019 return FALSE;
5020 break;
5022 default:
5023 die("line type %d not handled in switch", type);
5024 }
5026 return io_write(io, buf, bufsize);
5027 }
5029 static bool
5030 status_update_file(struct status *status, enum line_type type)
5031 {
5032 struct io io = {};
5033 bool result;
5035 if (!status_update_prepare(&io, type))
5036 return FALSE;
5038 result = status_update_write(&io, status, type);
5039 done_io(&io);
5040 return result;
5041 }
5043 static bool
5044 status_update_files(struct view *view, struct line *line)
5045 {
5046 struct io io = {};
5047 bool result = TRUE;
5048 struct line *pos = view->line + view->lines;
5049 int files = 0;
5050 int file, done;
5052 if (!status_update_prepare(&io, line->type))
5053 return FALSE;
5055 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
5056 files++;
5058 for (file = 0, done = 0; result && file < files; line++, file++) {
5059 int almost_done = file * 100 / files;
5061 if (almost_done > done) {
5062 done = almost_done;
5063 string_format(view->ref, "updating file %u of %u (%d%% done)",
5064 file, files, done);
5065 update_view_title(view);
5066 }
5067 result = status_update_write(&io, line->data, line->type);
5068 }
5070 done_io(&io);
5071 return result;
5072 }
5074 static bool
5075 status_update(struct view *view)
5076 {
5077 struct line *line = &view->line[view->lineno];
5079 assert(view->lines);
5081 if (!line->data) {
5082 /* This should work even for the "On branch" line. */
5083 if (line < view->line + view->lines && !line[1].data) {
5084 report("Nothing to update");
5085 return FALSE;
5086 }
5088 if (!status_update_files(view, line + 1)) {
5089 report("Failed to update file status");
5090 return FALSE;
5091 }
5093 } else if (!status_update_file(line->data, line->type)) {
5094 report("Failed to update file status");
5095 return FALSE;
5096 }
5098 return TRUE;
5099 }
5101 static bool
5102 status_revert(struct status *status, enum line_type type, bool has_none)
5103 {
5104 if (!status || type != LINE_STAT_UNSTAGED) {
5105 if (type == LINE_STAT_STAGED) {
5106 report("Cannot revert changes to staged files");
5107 } else if (type == LINE_STAT_UNTRACKED) {
5108 report("Cannot revert changes to untracked files");
5109 } else if (has_none) {
5110 report("Nothing to revert");
5111 } else {
5112 report("Cannot revert changes to multiple files");
5113 }
5114 return FALSE;
5116 } else {
5117 char mode[10] = "100644";
5118 const char *reset_argv[] = {
5119 "git", "update-index", "--cacheinfo", mode,
5120 status->old.rev, status->old.name, NULL
5121 };
5122 const char *checkout_argv[] = {
5123 "git", "checkout", "--", status->old.name, NULL
5124 };
5126 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
5127 return FALSE;
5128 string_format(mode, "%o", status->old.mode);
5129 return (status->status != 'U' || run_io_fg(reset_argv, opt_cdup)) &&
5130 run_io_fg(checkout_argv, opt_cdup);
5131 }
5132 }
5134 static enum request
5135 status_request(struct view *view, enum request request, struct line *line)
5136 {
5137 struct status *status = line->data;
5139 switch (request) {
5140 case REQ_STATUS_UPDATE:
5141 if (!status_update(view))
5142 return REQ_NONE;
5143 break;
5145 case REQ_STATUS_REVERT:
5146 if (!status_revert(status, line->type, status_has_none(view, line)))
5147 return REQ_NONE;
5148 break;
5150 case REQ_STATUS_MERGE:
5151 if (!status || status->status != 'U') {
5152 report("Merging only possible for files with unmerged status ('U').");
5153 return REQ_NONE;
5154 }
5155 open_mergetool(status->new.name);
5156 break;
5158 case REQ_EDIT:
5159 if (!status)
5160 return request;
5161 if (status->status == 'D') {
5162 report("File has been deleted.");
5163 return REQ_NONE;
5164 }
5166 open_editor(status->status != '?', status->new.name);
5167 break;
5169 case REQ_VIEW_BLAME:
5170 if (status) {
5171 string_copy(opt_file, status->new.name);
5172 opt_ref[0] = 0;
5173 }
5174 return request;
5176 case REQ_ENTER:
5177 /* After returning the status view has been split to
5178 * show the stage view. No further reloading is
5179 * necessary. */
5180 status_enter(view, line);
5181 return REQ_NONE;
5183 case REQ_REFRESH:
5184 /* Simply reload the view. */
5185 break;
5187 default:
5188 return request;
5189 }
5191 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5193 return REQ_NONE;
5194 }
5196 static void
5197 status_select(struct view *view, struct line *line)
5198 {
5199 struct status *status = line->data;
5200 char file[SIZEOF_STR] = "all files";
5201 const char *text;
5202 const char *key;
5204 if (status && !string_format(file, "'%s'", status->new.name))
5205 return;
5207 if (!status && line[1].type == LINE_STAT_NONE)
5208 line++;
5210 switch (line->type) {
5211 case LINE_STAT_STAGED:
5212 text = "Press %s to unstage %s for commit";
5213 break;
5215 case LINE_STAT_UNSTAGED:
5216 text = "Press %s to stage %s for commit";
5217 break;
5219 case LINE_STAT_UNTRACKED:
5220 text = "Press %s to stage %s for addition";
5221 break;
5223 case LINE_STAT_HEAD:
5224 case LINE_STAT_NONE:
5225 text = "Nothing to update";
5226 break;
5228 default:
5229 die("line type %d not handled in switch", line->type);
5230 }
5232 if (status && status->status == 'U') {
5233 text = "Press %s to resolve conflict in %s";
5234 key = get_key(REQ_STATUS_MERGE);
5236 } else {
5237 key = get_key(REQ_STATUS_UPDATE);
5238 }
5240 string_format(view->ref, text, key, file);
5241 }
5243 static bool
5244 status_grep(struct view *view, struct line *line)
5245 {
5246 struct status *status = line->data;
5247 enum { S_STATUS, S_NAME, S_END } state;
5248 char buf[2] = "?";
5249 regmatch_t pmatch;
5251 if (!status)
5252 return FALSE;
5254 for (state = S_STATUS; state < S_END; state++) {
5255 const char *text;
5257 switch (state) {
5258 case S_NAME: text = status->new.name; break;
5259 case S_STATUS:
5260 buf[0] = status->status;
5261 text = buf;
5262 break;
5264 default:
5265 return FALSE;
5266 }
5268 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5269 return TRUE;
5270 }
5272 return FALSE;
5273 }
5275 static struct view_ops status_ops = {
5276 "file",
5277 NULL,
5278 status_open,
5279 NULL,
5280 status_draw,
5281 status_request,
5282 status_grep,
5283 status_select,
5284 };
5287 static bool
5288 stage_diff_write(struct io *io, struct line *line, struct line *end)
5289 {
5290 while (line < end) {
5291 if (!io_write(io, line->data, strlen(line->data)) ||
5292 !io_write(io, "\n", 1))
5293 return FALSE;
5294 line++;
5295 if (line->type == LINE_DIFF_CHUNK ||
5296 line->type == LINE_DIFF_HEADER)
5297 break;
5298 }
5300 return TRUE;
5301 }
5303 static struct line *
5304 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5305 {
5306 for (; view->line < line; line--)
5307 if (line->type == type)
5308 return line;
5310 return NULL;
5311 }
5313 static bool
5314 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5315 {
5316 const char *apply_argv[SIZEOF_ARG] = {
5317 "git", "apply", "--whitespace=nowarn", NULL
5318 };
5319 struct line *diff_hdr;
5320 struct io io = {};
5321 int argc = 3;
5323 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5324 if (!diff_hdr)
5325 return FALSE;
5327 if (!revert)
5328 apply_argv[argc++] = "--cached";
5329 if (revert || stage_line_type == LINE_STAT_STAGED)
5330 apply_argv[argc++] = "-R";
5331 apply_argv[argc++] = "-";
5332 apply_argv[argc++] = NULL;
5333 if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
5334 return FALSE;
5336 if (!stage_diff_write(&io, diff_hdr, chunk) ||
5337 !stage_diff_write(&io, chunk, view->line + view->lines))
5338 chunk = NULL;
5340 done_io(&io);
5341 run_io_bg(update_index_argv);
5343 return chunk ? TRUE : FALSE;
5344 }
5346 static bool
5347 stage_update(struct view *view, struct line *line)
5348 {
5349 struct line *chunk = NULL;
5351 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5352 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5354 if (chunk) {
5355 if (!stage_apply_chunk(view, chunk, FALSE)) {
5356 report("Failed to apply chunk");
5357 return FALSE;
5358 }
5360 } else if (!stage_status.status) {
5361 view = VIEW(REQ_VIEW_STATUS);
5363 for (line = view->line; line < view->line + view->lines; line++)
5364 if (line->type == stage_line_type)
5365 break;
5367 if (!status_update_files(view, line + 1)) {
5368 report("Failed to update files");
5369 return FALSE;
5370 }
5372 } else if (!status_update_file(&stage_status, stage_line_type)) {
5373 report("Failed to update file");
5374 return FALSE;
5375 }
5377 return TRUE;
5378 }
5380 static bool
5381 stage_revert(struct view *view, struct line *line)
5382 {
5383 struct line *chunk = NULL;
5385 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5386 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5388 if (chunk) {
5389 if (!prompt_yesno("Are you sure you want to revert changes?"))
5390 return FALSE;
5392 if (!stage_apply_chunk(view, chunk, TRUE)) {
5393 report("Failed to revert chunk");
5394 return FALSE;
5395 }
5396 return TRUE;
5398 } else {
5399 return status_revert(stage_status.status ? &stage_status : NULL,
5400 stage_line_type, FALSE);
5401 }
5402 }
5405 static void
5406 stage_next(struct view *view, struct line *line)
5407 {
5408 int i;
5410 if (!stage_chunks) {
5411 static size_t alloc = 0;
5412 int *tmp;
5414 for (line = view->line; line < view->line + view->lines; line++) {
5415 if (line->type != LINE_DIFF_CHUNK)
5416 continue;
5418 tmp = realloc_items(stage_chunk, &alloc,
5419 stage_chunks, sizeof(*tmp));
5420 if (!tmp) {
5421 report("Allocation failure");
5422 return;
5423 }
5425 stage_chunk = tmp;
5426 stage_chunk[stage_chunks++] = line - view->line;
5427 }
5428 }
5430 for (i = 0; i < stage_chunks; i++) {
5431 if (stage_chunk[i] > view->lineno) {
5432 do_scroll_view(view, stage_chunk[i] - view->lineno);
5433 report("Chunk %d of %d", i + 1, stage_chunks);
5434 return;
5435 }
5436 }
5438 report("No next chunk found");
5439 }
5441 static enum request
5442 stage_request(struct view *view, enum request request, struct line *line)
5443 {
5444 switch (request) {
5445 case REQ_STATUS_UPDATE:
5446 if (!stage_update(view, line))
5447 return REQ_NONE;
5448 break;
5450 case REQ_STATUS_REVERT:
5451 if (!stage_revert(view, line))
5452 return REQ_NONE;
5453 break;
5455 case REQ_STAGE_NEXT:
5456 if (stage_line_type == LINE_STAT_UNTRACKED) {
5457 report("File is untracked; press %s to add",
5458 get_key(REQ_STATUS_UPDATE));
5459 return REQ_NONE;
5460 }
5461 stage_next(view, line);
5462 return REQ_NONE;
5464 case REQ_EDIT:
5465 if (!stage_status.new.name[0])
5466 return request;
5467 if (stage_status.status == 'D') {
5468 report("File has been deleted.");
5469 return REQ_NONE;
5470 }
5472 open_editor(stage_status.status != '?', stage_status.new.name);
5473 break;
5475 case REQ_REFRESH:
5476 /* Reload everything ... */
5477 break;
5479 case REQ_VIEW_BLAME:
5480 if (stage_status.new.name[0]) {
5481 string_copy(opt_file, stage_status.new.name);
5482 opt_ref[0] = 0;
5483 }
5484 return request;
5486 case REQ_ENTER:
5487 return pager_request(view, request, line);
5489 default:
5490 return request;
5491 }
5493 VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5494 open_view(view, REQ_VIEW_STATUS, OPEN_REFRESH);
5496 /* Check whether the staged entry still exists, and close the
5497 * stage view if it doesn't. */
5498 if (!status_exists(&stage_status, stage_line_type)) {
5499 status_restore(VIEW(REQ_VIEW_STATUS));
5500 return REQ_VIEW_CLOSE;
5501 }
5503 if (stage_line_type == LINE_STAT_UNTRACKED) {
5504 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5505 report("Cannot display a directory");
5506 return REQ_NONE;
5507 }
5509 if (!prepare_update_file(view, stage_status.new.name)) {
5510 report("Failed to open file: %s", strerror(errno));
5511 return REQ_NONE;
5512 }
5513 }
5514 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5516 return REQ_NONE;
5517 }
5519 static struct view_ops stage_ops = {
5520 "line",
5521 NULL,
5522 NULL,
5523 pager_read,
5524 pager_draw,
5525 stage_request,
5526 pager_grep,
5527 pager_select,
5528 };
5531 /*
5532 * Revision graph
5533 */
5535 struct commit {
5536 char id[SIZEOF_REV]; /* SHA1 ID. */
5537 char title[128]; /* First line of the commit message. */
5538 char author[75]; /* Author of the commit. */
5539 struct tm time; /* Date from the author ident. */
5540 struct ref **refs; /* Repository references. */
5541 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
5542 size_t graph_size; /* The width of the graph array. */
5543 bool has_parents; /* Rewritten --parents seen. */
5544 };
5546 /* Size of rev graph with no "padding" columns */
5547 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5549 struct rev_graph {
5550 struct rev_graph *prev, *next, *parents;
5551 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5552 size_t size;
5553 struct commit *commit;
5554 size_t pos;
5555 unsigned int boundary:1;
5556 };
5558 /* Parents of the commit being visualized. */
5559 static struct rev_graph graph_parents[4];
5561 /* The current stack of revisions on the graph. */
5562 static struct rev_graph graph_stacks[4] = {
5563 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5564 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5565 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5566 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5567 };
5569 static inline bool
5570 graph_parent_is_merge(struct rev_graph *graph)
5571 {
5572 return graph->parents->size > 1;
5573 }
5575 static inline void
5576 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5577 {
5578 struct commit *commit = graph->commit;
5580 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5581 commit->graph[commit->graph_size++] = symbol;
5582 }
5584 static void
5585 clear_rev_graph(struct rev_graph *graph)
5586 {
5587 graph->boundary = 0;
5588 graph->size = graph->pos = 0;
5589 graph->commit = NULL;
5590 memset(graph->parents, 0, sizeof(*graph->parents));
5591 }
5593 static void
5594 done_rev_graph(struct rev_graph *graph)
5595 {
5596 if (graph_parent_is_merge(graph) &&
5597 graph->pos < graph->size - 1 &&
5598 graph->next->size == graph->size + graph->parents->size - 1) {
5599 size_t i = graph->pos + graph->parents->size - 1;
5601 graph->commit->graph_size = i * 2;
5602 while (i < graph->next->size - 1) {
5603 append_to_rev_graph(graph, ' ');
5604 append_to_rev_graph(graph, '\\');
5605 i++;
5606 }
5607 }
5609 clear_rev_graph(graph);
5610 }
5612 static void
5613 push_rev_graph(struct rev_graph *graph, const char *parent)
5614 {
5615 int i;
5617 /* "Collapse" duplicate parents lines.
5618 *
5619 * FIXME: This needs to also update update the drawn graph but
5620 * for now it just serves as a method for pruning graph lines. */
5621 for (i = 0; i < graph->size; i++)
5622 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5623 return;
5625 if (graph->size < SIZEOF_REVITEMS) {
5626 string_copy_rev(graph->rev[graph->size++], parent);
5627 }
5628 }
5630 static chtype
5631 get_rev_graph_symbol(struct rev_graph *graph)
5632 {
5633 chtype symbol;
5635 if (graph->boundary)
5636 symbol = REVGRAPH_BOUND;
5637 else if (graph->parents->size == 0)
5638 symbol = REVGRAPH_INIT;
5639 else if (graph_parent_is_merge(graph))
5640 symbol = REVGRAPH_MERGE;
5641 else if (graph->pos >= graph->size)
5642 symbol = REVGRAPH_BRANCH;
5643 else
5644 symbol = REVGRAPH_COMMIT;
5646 return symbol;
5647 }
5649 static void
5650 draw_rev_graph(struct rev_graph *graph)
5651 {
5652 struct rev_filler {
5653 chtype separator, line;
5654 };
5655 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
5656 static struct rev_filler fillers[] = {
5657 { ' ', '|' },
5658 { '`', '.' },
5659 { '\'', ' ' },
5660 { '/', ' ' },
5661 };
5662 chtype symbol = get_rev_graph_symbol(graph);
5663 struct rev_filler *filler;
5664 size_t i;
5666 if (opt_line_graphics)
5667 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
5669 filler = &fillers[DEFAULT];
5671 for (i = 0; i < graph->pos; i++) {
5672 append_to_rev_graph(graph, filler->line);
5673 if (graph_parent_is_merge(graph->prev) &&
5674 graph->prev->pos == i)
5675 filler = &fillers[RSHARP];
5677 append_to_rev_graph(graph, filler->separator);
5678 }
5680 /* Place the symbol for this revision. */
5681 append_to_rev_graph(graph, symbol);
5683 if (graph->prev->size > graph->size)
5684 filler = &fillers[RDIAG];
5685 else
5686 filler = &fillers[DEFAULT];
5688 i++;
5690 for (; i < graph->size; i++) {
5691 append_to_rev_graph(graph, filler->separator);
5692 append_to_rev_graph(graph, filler->line);
5693 if (graph_parent_is_merge(graph->prev) &&
5694 i < graph->prev->pos + graph->parents->size)
5695 filler = &fillers[RSHARP];
5696 if (graph->prev->size > graph->size)
5697 filler = &fillers[LDIAG];
5698 }
5700 if (graph->prev->size > graph->size) {
5701 append_to_rev_graph(graph, filler->separator);
5702 if (filler->line != ' ')
5703 append_to_rev_graph(graph, filler->line);
5704 }
5705 }
5707 /* Prepare the next rev graph */
5708 static void
5709 prepare_rev_graph(struct rev_graph *graph)
5710 {
5711 size_t i;
5713 /* First, traverse all lines of revisions up to the active one. */
5714 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5715 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5716 break;
5718 push_rev_graph(graph->next, graph->rev[graph->pos]);
5719 }
5721 /* Interleave the new revision parent(s). */
5722 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5723 push_rev_graph(graph->next, graph->parents->rev[i]);
5725 /* Lastly, put any remaining revisions. */
5726 for (i = graph->pos + 1; i < graph->size; i++)
5727 push_rev_graph(graph->next, graph->rev[i]);
5728 }
5730 static void
5731 update_rev_graph(struct view *view, struct rev_graph *graph)
5732 {
5733 /* If this is the finalizing update ... */
5734 if (graph->commit)
5735 prepare_rev_graph(graph);
5737 /* Graph visualization needs a one rev look-ahead,
5738 * so the first update doesn't visualize anything. */
5739 if (!graph->prev->commit)
5740 return;
5742 if (view->lines > 2)
5743 view->line[view->lines - 3].dirty = 1;
5744 if (view->lines > 1)
5745 view->line[view->lines - 2].dirty = 1;
5746 draw_rev_graph(graph->prev);
5747 done_rev_graph(graph->prev->prev);
5748 }
5751 /*
5752 * Main view backend
5753 */
5755 static const char *main_argv[SIZEOF_ARG] = {
5756 "git", "log", "--no-color", "--pretty=raw", "--parents",
5757 "--topo-order", "%(head)", NULL
5758 };
5760 static bool
5761 main_draw(struct view *view, struct line *line, unsigned int lineno)
5762 {
5763 struct commit *commit = line->data;
5765 if (!*commit->author)
5766 return FALSE;
5768 if (opt_date && draw_date(view, &commit->time))
5769 return TRUE;
5771 if (opt_author && draw_author(view, commit->author))
5772 return TRUE;
5774 if (opt_rev_graph && commit->graph_size &&
5775 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5776 return TRUE;
5778 if (opt_show_refs && commit->refs) {
5779 size_t i = 0;
5781 do {
5782 enum line_type type;
5784 if (commit->refs[i]->head)
5785 type = LINE_MAIN_HEAD;
5786 else if (commit->refs[i]->ltag)
5787 type = LINE_MAIN_LOCAL_TAG;
5788 else if (commit->refs[i]->tag)
5789 type = LINE_MAIN_TAG;
5790 else if (commit->refs[i]->tracked)
5791 type = LINE_MAIN_TRACKED;
5792 else if (commit->refs[i]->remote)
5793 type = LINE_MAIN_REMOTE;
5794 else
5795 type = LINE_MAIN_REF;
5797 if (draw_text(view, type, "[", TRUE) ||
5798 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5799 draw_text(view, type, "]", TRUE))
5800 return TRUE;
5802 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5803 return TRUE;
5804 } while (commit->refs[i++]->next);
5805 }
5807 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5808 return TRUE;
5809 }
5811 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5812 static bool
5813 main_read(struct view *view, char *line)
5814 {
5815 static struct rev_graph *graph = graph_stacks;
5816 enum line_type type;
5817 struct commit *commit;
5819 if (!line) {
5820 int i;
5822 if (!view->lines && !view->parent)
5823 die("No revisions match the given arguments.");
5824 if (view->lines > 0) {
5825 commit = view->line[view->lines - 1].data;
5826 view->line[view->lines - 1].dirty = 1;
5827 if (!*commit->author) {
5828 view->lines--;
5829 free(commit);
5830 graph->commit = NULL;
5831 }
5832 }
5833 update_rev_graph(view, graph);
5835 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5836 clear_rev_graph(&graph_stacks[i]);
5837 return TRUE;
5838 }
5840 type = get_line_type(line);
5841 if (type == LINE_COMMIT) {
5842 commit = calloc(1, sizeof(struct commit));
5843 if (!commit)
5844 return FALSE;
5846 line += STRING_SIZE("commit ");
5847 if (*line == '-') {
5848 graph->boundary = 1;
5849 line++;
5850 }
5852 string_copy_rev(commit->id, line);
5853 commit->refs = get_refs(commit->id);
5854 graph->commit = commit;
5855 add_line_data(view, commit, LINE_MAIN_COMMIT);
5857 while ((line = strchr(line, ' '))) {
5858 line++;
5859 push_rev_graph(graph->parents, line);
5860 commit->has_parents = TRUE;
5861 }
5862 return TRUE;
5863 }
5865 if (!view->lines)
5866 return TRUE;
5867 commit = view->line[view->lines - 1].data;
5869 switch (type) {
5870 case LINE_PARENT:
5871 if (commit->has_parents)
5872 break;
5873 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5874 break;
5876 case LINE_AUTHOR:
5877 parse_author_line(line + STRING_SIZE("author "),
5878 commit->author, sizeof(commit->author),
5879 &commit->time);
5880 update_rev_graph(view, graph);
5881 graph = graph->next;
5882 break;
5884 default:
5885 /* Fill in the commit title if it has not already been set. */
5886 if (commit->title[0])
5887 break;
5889 /* Require titles to start with a non-space character at the
5890 * offset used by git log. */
5891 if (strncmp(line, " ", 4))
5892 break;
5893 line += 4;
5894 /* Well, if the title starts with a whitespace character,
5895 * try to be forgiving. Otherwise we end up with no title. */
5896 while (isspace(*line))
5897 line++;
5898 if (*line == '\0')
5899 break;
5900 /* FIXME: More graceful handling of titles; append "..." to
5901 * shortened titles, etc. */
5903 string_expand(commit->title, sizeof(commit->title), line, 1);
5904 view->line[view->lines - 1].dirty = 1;
5905 }
5907 return TRUE;
5908 }
5910 static enum request
5911 main_request(struct view *view, enum request request, struct line *line)
5912 {
5913 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5915 switch (request) {
5916 case REQ_ENTER:
5917 open_view(view, REQ_VIEW_DIFF, flags);
5918 break;
5919 case REQ_REFRESH:
5920 load_refs();
5921 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5922 break;
5923 default:
5924 return request;
5925 }
5927 return REQ_NONE;
5928 }
5930 static bool
5931 grep_refs(struct ref **refs, regex_t *regex)
5932 {
5933 regmatch_t pmatch;
5934 size_t i = 0;
5936 if (!refs)
5937 return FALSE;
5938 do {
5939 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5940 return TRUE;
5941 } while (refs[i++]->next);
5943 return FALSE;
5944 }
5946 static bool
5947 main_grep(struct view *view, struct line *line)
5948 {
5949 struct commit *commit = line->data;
5950 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5951 char buf[DATE_COLS + 1];
5952 regmatch_t pmatch;
5954 for (state = S_TITLE; state < S_END; state++) {
5955 char *text;
5957 switch (state) {
5958 case S_TITLE: text = commit->title; break;
5959 case S_AUTHOR:
5960 if (!opt_author)
5961 continue;
5962 text = commit->author;
5963 break;
5964 case S_DATE:
5965 if (!opt_date)
5966 continue;
5967 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5968 continue;
5969 text = buf;
5970 break;
5971 case S_REFS:
5972 if (!opt_show_refs)
5973 continue;
5974 if (grep_refs(commit->refs, view->regex) == TRUE)
5975 return TRUE;
5976 continue;
5977 default:
5978 return FALSE;
5979 }
5981 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5982 return TRUE;
5983 }
5985 return FALSE;
5986 }
5988 static void
5989 main_select(struct view *view, struct line *line)
5990 {
5991 struct commit *commit = line->data;
5993 string_copy_rev(view->ref, commit->id);
5994 string_copy_rev(ref_commit, view->ref);
5995 }
5997 static struct view_ops main_ops = {
5998 "commit",
5999 main_argv,
6000 NULL,
6001 main_read,
6002 main_draw,
6003 main_request,
6004 main_grep,
6005 main_select,
6006 };
6009 /*
6010 * Unicode / UTF-8 handling
6011 *
6012 * NOTE: Much of the following code for dealing with Unicode is derived from
6013 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
6014 * src/intl/charset.c from the UTF-8 branch commit elinks-0.11.0-g31f2c28.
6015 */
6017 static inline int
6018 unicode_width(unsigned long c)
6019 {
6020 if (c >= 0x1100 &&
6021 (c <= 0x115f /* Hangul Jamo */
6022 || c == 0x2329
6023 || c == 0x232a
6024 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
6025 /* CJK ... Yi */
6026 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
6027 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
6028 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
6029 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
6030 || (c >= 0xffe0 && c <= 0xffe6)
6031 || (c >= 0x20000 && c <= 0x2fffd)
6032 || (c >= 0x30000 && c <= 0x3fffd)))
6033 return 2;
6035 if (c == '\t')
6036 return opt_tab_size;
6038 return 1;
6039 }
6041 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
6042 * Illegal bytes are set one. */
6043 static const unsigned char utf8_bytes[256] = {
6044 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,
6045 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,
6046 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,
6047 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,
6048 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,
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 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,
6051 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,
6052 };
6054 /* Decode UTF-8 multi-byte representation into a Unicode character. */
6055 static inline unsigned long
6056 utf8_to_unicode(const char *string, size_t length)
6057 {
6058 unsigned long unicode;
6060 switch (length) {
6061 case 1:
6062 unicode = string[0];
6063 break;
6064 case 2:
6065 unicode = (string[0] & 0x1f) << 6;
6066 unicode += (string[1] & 0x3f);
6067 break;
6068 case 3:
6069 unicode = (string[0] & 0x0f) << 12;
6070 unicode += ((string[1] & 0x3f) << 6);
6071 unicode += (string[2] & 0x3f);
6072 break;
6073 case 4:
6074 unicode = (string[0] & 0x0f) << 18;
6075 unicode += ((string[1] & 0x3f) << 12);
6076 unicode += ((string[2] & 0x3f) << 6);
6077 unicode += (string[3] & 0x3f);
6078 break;
6079 case 5:
6080 unicode = (string[0] & 0x0f) << 24;
6081 unicode += ((string[1] & 0x3f) << 18);
6082 unicode += ((string[2] & 0x3f) << 12);
6083 unicode += ((string[3] & 0x3f) << 6);
6084 unicode += (string[4] & 0x3f);
6085 break;
6086 case 6:
6087 unicode = (string[0] & 0x01) << 30;
6088 unicode += ((string[1] & 0x3f) << 24);
6089 unicode += ((string[2] & 0x3f) << 18);
6090 unicode += ((string[3] & 0x3f) << 12);
6091 unicode += ((string[4] & 0x3f) << 6);
6092 unicode += (string[5] & 0x3f);
6093 break;
6094 default:
6095 die("Invalid Unicode length");
6096 }
6098 /* Invalid characters could return the special 0xfffd value but NUL
6099 * should be just as good. */
6100 return unicode > 0xffff ? 0 : unicode;
6101 }
6103 /* Calculates how much of string can be shown within the given maximum width
6104 * and sets trimmed parameter to non-zero value if all of string could not be
6105 * shown. If the reserve flag is TRUE, it will reserve at least one
6106 * trailing character, which can be useful when drawing a delimiter.
6107 *
6108 * Returns the number of bytes to output from string to satisfy max_width. */
6109 static size_t
6110 utf8_length(const char **start, size_t skip, int *width, size_t max_width, int *trimmed, bool reserve)
6111 {
6112 const char *string = *start;
6113 const char *end = strchr(string, '\0');
6114 unsigned char last_bytes = 0;
6115 size_t last_ucwidth = 0;
6117 *width = 0;
6118 *trimmed = 0;
6120 while (string < end) {
6121 int c = *(unsigned char *) string;
6122 unsigned char bytes = utf8_bytes[c];
6123 size_t ucwidth;
6124 unsigned long unicode;
6126 if (string + bytes > end)
6127 break;
6129 /* Change representation to figure out whether
6130 * it is a single- or double-width character. */
6132 unicode = utf8_to_unicode(string, bytes);
6133 /* FIXME: Graceful handling of invalid Unicode character. */
6134 if (!unicode)
6135 break;
6137 ucwidth = unicode_width(unicode);
6138 if (skip > 0) {
6139 skip -= ucwidth <= skip ? ucwidth : skip;
6140 *start += bytes;
6141 }
6142 *width += ucwidth;
6143 if (*width > max_width) {
6144 *trimmed = 1;
6145 *width -= ucwidth;
6146 if (reserve && *width == max_width) {
6147 string -= last_bytes;
6148 *width -= last_ucwidth;
6149 }
6150 break;
6151 }
6153 string += bytes;
6154 last_bytes = ucwidth ? bytes : 0;
6155 last_ucwidth = ucwidth;
6156 }
6158 return string - *start;
6159 }
6162 /*
6163 * Status management
6164 */
6166 /* Whether or not the curses interface has been initialized. */
6167 static bool cursed = FALSE;
6169 /* Terminal hacks and workarounds. */
6170 static bool use_scroll_redrawwin;
6171 static bool use_scroll_status_wclear;
6173 /* The status window is used for polling keystrokes. */
6174 static WINDOW *status_win;
6176 /* Reading from the prompt? */
6177 static bool input_mode = FALSE;
6179 static bool status_empty = FALSE;
6181 /* Update status and title window. */
6182 static void
6183 report(const char *msg, ...)
6184 {
6185 struct view *view = display[current_view];
6187 if (input_mode)
6188 return;
6190 if (!view) {
6191 char buf[SIZEOF_STR];
6192 va_list args;
6194 va_start(args, msg);
6195 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6196 buf[sizeof(buf) - 1] = 0;
6197 buf[sizeof(buf) - 2] = '.';
6198 buf[sizeof(buf) - 3] = '.';
6199 buf[sizeof(buf) - 4] = '.';
6200 }
6201 va_end(args);
6202 die("%s", buf);
6203 }
6205 if (!status_empty || *msg) {
6206 va_list args;
6208 va_start(args, msg);
6210 wmove(status_win, 0, 0);
6211 if (view->has_scrolled && use_scroll_status_wclear)
6212 wclear(status_win);
6213 if (*msg) {
6214 vwprintw(status_win, msg, args);
6215 status_empty = FALSE;
6216 } else {
6217 status_empty = TRUE;
6218 }
6219 wclrtoeol(status_win);
6220 wnoutrefresh(status_win);
6222 va_end(args);
6223 }
6225 update_view_title(view);
6226 }
6228 /* Controls when nodelay should be in effect when polling user input. */
6229 static void
6230 set_nonblocking_input(bool loading)
6231 {
6232 static unsigned int loading_views;
6234 if ((loading == FALSE && loading_views-- == 1) ||
6235 (loading == TRUE && loading_views++ == 0))
6236 nodelay(status_win, loading);
6237 }
6239 static void
6240 init_display(void)
6241 {
6242 const char *term;
6243 int x, y;
6245 /* Initialize the curses library */
6246 if (isatty(STDIN_FILENO)) {
6247 cursed = !!initscr();
6248 opt_tty = stdin;
6249 } else {
6250 /* Leave stdin and stdout alone when acting as a pager. */
6251 opt_tty = fopen("/dev/tty", "r+");
6252 if (!opt_tty)
6253 die("Failed to open /dev/tty");
6254 cursed = !!newterm(NULL, opt_tty, opt_tty);
6255 }
6257 if (!cursed)
6258 die("Failed to initialize curses");
6260 nonl(); /* Disable conversion and detect newlines from input. */
6261 cbreak(); /* Take input chars one at a time, no wait for \n */
6262 noecho(); /* Don't echo input */
6263 leaveok(stdscr, FALSE);
6265 if (has_colors())
6266 init_colors();
6268 getmaxyx(stdscr, y, x);
6269 status_win = newwin(1, 0, y - 1, 0);
6270 if (!status_win)
6271 die("Failed to create status window");
6273 /* Enable keyboard mapping */
6274 keypad(status_win, TRUE);
6275 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6277 TABSIZE = opt_tab_size;
6278 if (opt_line_graphics) {
6279 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
6280 }
6282 term = getenv("XTERM_VERSION") ? NULL : getenv("COLORTERM");
6283 if (term && !strcmp(term, "gnome-terminal")) {
6284 /* In the gnome-terminal-emulator, the message from
6285 * scrolling up one line when impossible followed by
6286 * scrolling down one line causes corruption of the
6287 * status line. This is fixed by calling wclear. */
6288 use_scroll_status_wclear = TRUE;
6289 use_scroll_redrawwin = FALSE;
6291 } else if (term && !strcmp(term, "xrvt-xpm")) {
6292 /* No problems with full optimizations in xrvt-(unicode)
6293 * and aterm. */
6294 use_scroll_status_wclear = use_scroll_redrawwin = FALSE;
6296 } else {
6297 /* When scrolling in (u)xterm the last line in the
6298 * scrolling direction will update slowly. */
6299 use_scroll_redrawwin = TRUE;
6300 use_scroll_status_wclear = FALSE;
6301 }
6302 }
6304 static int
6305 get_input(int prompt_position)
6306 {
6307 struct view *view;
6308 int i, key, cursor_y, cursor_x;
6310 if (prompt_position)
6311 input_mode = TRUE;
6313 while (TRUE) {
6314 foreach_view (view, i) {
6315 update_view(view);
6316 if (view_is_displayed(view) && view->has_scrolled &&
6317 use_scroll_redrawwin)
6318 redrawwin(view->win);
6319 view->has_scrolled = FALSE;
6320 }
6322 /* Update the cursor position. */
6323 if (prompt_position) {
6324 getbegyx(status_win, cursor_y, cursor_x);
6325 cursor_x = prompt_position;
6326 } else {
6327 view = display[current_view];
6328 getbegyx(view->win, cursor_y, cursor_x);
6329 cursor_x = view->width - 1;
6330 cursor_y += view->lineno - view->offset;
6331 }
6332 setsyx(cursor_y, cursor_x);
6334 /* Refresh, accept single keystroke of input */
6335 doupdate();
6336 key = wgetch(status_win);
6338 /* wgetch() with nodelay() enabled returns ERR when
6339 * there's no input. */
6340 if (key == ERR) {
6342 } else if (key == KEY_RESIZE) {
6343 int height, width;
6345 getmaxyx(stdscr, height, width);
6347 wresize(status_win, 1, width);
6348 mvwin(status_win, height - 1, 0);
6349 wnoutrefresh(status_win);
6350 resize_display();
6351 redraw_display(TRUE);
6353 } else {
6354 input_mode = FALSE;
6355 return key;
6356 }
6357 }
6358 }
6360 static char *
6361 prompt_input(const char *prompt, input_handler handler, void *data)
6362 {
6363 enum input_status status = INPUT_OK;
6364 static char buf[SIZEOF_STR];
6365 size_t pos = 0;
6367 buf[pos] = 0;
6369 while (status == INPUT_OK || status == INPUT_SKIP) {
6370 int key;
6372 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6373 wclrtoeol(status_win);
6375 key = get_input(pos + 1);
6376 switch (key) {
6377 case KEY_RETURN:
6378 case KEY_ENTER:
6379 case '\n':
6380 status = pos ? INPUT_STOP : INPUT_CANCEL;
6381 break;
6383 case KEY_BACKSPACE:
6384 if (pos > 0)
6385 buf[--pos] = 0;
6386 else
6387 status = INPUT_CANCEL;
6388 break;
6390 case KEY_ESC:
6391 status = INPUT_CANCEL;
6392 break;
6394 default:
6395 if (pos >= sizeof(buf)) {
6396 report("Input string too long");
6397 return NULL;
6398 }
6400 status = handler(data, buf, key);
6401 if (status == INPUT_OK)
6402 buf[pos++] = (char) key;
6403 }
6404 }
6406 /* Clear the status window */
6407 status_empty = FALSE;
6408 report("");
6410 if (status == INPUT_CANCEL)
6411 return NULL;
6413 buf[pos++] = 0;
6415 return buf;
6416 }
6418 static enum input_status
6419 prompt_yesno_handler(void *data, char *buf, int c)
6420 {
6421 if (c == 'y' || c == 'Y')
6422 return INPUT_STOP;
6423 if (c == 'n' || c == 'N')
6424 return INPUT_CANCEL;
6425 return INPUT_SKIP;
6426 }
6428 static bool
6429 prompt_yesno(const char *prompt)
6430 {
6431 char prompt2[SIZEOF_STR];
6433 if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6434 return FALSE;
6436 return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6437 }
6439 static enum input_status
6440 read_prompt_handler(void *data, char *buf, int c)
6441 {
6442 return isprint(c) ? INPUT_OK : INPUT_SKIP;
6443 }
6445 static char *
6446 read_prompt(const char *prompt)
6447 {
6448 return prompt_input(prompt, read_prompt_handler, NULL);
6449 }
6451 /*
6452 * Repository properties
6453 */
6455 static struct ref *refs = NULL;
6456 static size_t refs_alloc = 0;
6457 static size_t refs_size = 0;
6459 /* Id <-> ref store */
6460 static struct ref ***id_refs = NULL;
6461 static size_t id_refs_alloc = 0;
6462 static size_t id_refs_size = 0;
6464 static int
6465 compare_refs(const void *ref1_, const void *ref2_)
6466 {
6467 const struct ref *ref1 = *(const struct ref **)ref1_;
6468 const struct ref *ref2 = *(const struct ref **)ref2_;
6470 if (ref1->tag != ref2->tag)
6471 return ref2->tag - ref1->tag;
6472 if (ref1->ltag != ref2->ltag)
6473 return ref2->ltag - ref2->ltag;
6474 if (ref1->head != ref2->head)
6475 return ref2->head - ref1->head;
6476 if (ref1->tracked != ref2->tracked)
6477 return ref2->tracked - ref1->tracked;
6478 if (ref1->remote != ref2->remote)
6479 return ref2->remote - ref1->remote;
6480 return strcmp(ref1->name, ref2->name);
6481 }
6483 static struct ref **
6484 get_refs(const char *id)
6485 {
6486 struct ref ***tmp_id_refs;
6487 struct ref **ref_list = NULL;
6488 size_t ref_list_alloc = 0;
6489 size_t ref_list_size = 0;
6490 size_t i;
6492 for (i = 0; i < id_refs_size; i++)
6493 if (!strcmp(id, id_refs[i][0]->id))
6494 return id_refs[i];
6496 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
6497 sizeof(*id_refs));
6498 if (!tmp_id_refs)
6499 return NULL;
6501 id_refs = tmp_id_refs;
6503 for (i = 0; i < refs_size; i++) {
6504 struct ref **tmp;
6506 if (strcmp(id, refs[i].id))
6507 continue;
6509 tmp = realloc_items(ref_list, &ref_list_alloc,
6510 ref_list_size + 1, sizeof(*ref_list));
6511 if (!tmp) {
6512 if (ref_list)
6513 free(ref_list);
6514 return NULL;
6515 }
6517 ref_list = tmp;
6518 ref_list[ref_list_size] = &refs[i];
6519 /* XXX: The properties of the commit chains ensures that we can
6520 * safely modify the shared ref. The repo references will
6521 * always be similar for the same id. */
6522 ref_list[ref_list_size]->next = 1;
6524 ref_list_size++;
6525 }
6527 if (ref_list) {
6528 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
6529 ref_list[ref_list_size - 1]->next = 0;
6530 id_refs[id_refs_size++] = ref_list;
6531 }
6533 return ref_list;
6534 }
6536 static int
6537 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6538 {
6539 struct ref *ref;
6540 bool tag = FALSE;
6541 bool ltag = FALSE;
6542 bool remote = FALSE;
6543 bool tracked = FALSE;
6544 bool check_replace = FALSE;
6545 bool head = FALSE;
6547 if (!prefixcmp(name, "refs/tags/")) {
6548 if (!suffixcmp(name, namelen, "^{}")) {
6549 namelen -= 3;
6550 name[namelen] = 0;
6551 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
6552 check_replace = TRUE;
6553 } else {
6554 ltag = TRUE;
6555 }
6557 tag = TRUE;
6558 namelen -= STRING_SIZE("refs/tags/");
6559 name += STRING_SIZE("refs/tags/");
6561 } else if (!prefixcmp(name, "refs/remotes/")) {
6562 remote = TRUE;
6563 namelen -= STRING_SIZE("refs/remotes/");
6564 name += STRING_SIZE("refs/remotes/");
6565 tracked = !strcmp(opt_remote, name);
6567 } else if (!prefixcmp(name, "refs/heads/")) {
6568 namelen -= STRING_SIZE("refs/heads/");
6569 name += STRING_SIZE("refs/heads/");
6570 head = !strncmp(opt_head, name, namelen);
6572 } else if (!strcmp(name, "HEAD")) {
6573 string_ncopy(opt_head_rev, id, idlen);
6574 return OK;
6575 }
6577 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
6578 /* it's an annotated tag, replace the previous SHA1 with the
6579 * resolved commit id; relies on the fact git-ls-remote lists
6580 * the commit id of an annotated tag right before the commit id
6581 * it points to. */
6582 refs[refs_size - 1].ltag = ltag;
6583 string_copy_rev(refs[refs_size - 1].id, id);
6585 return OK;
6586 }
6587 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
6588 if (!refs)
6589 return ERR;
6591 ref = &refs[refs_size++];
6592 ref->name = malloc(namelen + 1);
6593 if (!ref->name)
6594 return ERR;
6596 strncpy(ref->name, name, namelen);
6597 ref->name[namelen] = 0;
6598 ref->head = head;
6599 ref->tag = tag;
6600 ref->ltag = ltag;
6601 ref->remote = remote;
6602 ref->tracked = tracked;
6603 string_copy_rev(ref->id, id);
6605 return OK;
6606 }
6608 static int
6609 load_refs(void)
6610 {
6611 static const char *ls_remote_argv[SIZEOF_ARG] = {
6612 "git", "ls-remote", ".", NULL
6613 };
6614 static bool init = FALSE;
6616 if (!init) {
6617 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6618 init = TRUE;
6619 }
6621 if (!*opt_git_dir)
6622 return OK;
6624 while (refs_size > 0)
6625 free(refs[--refs_size].name);
6626 while (id_refs_size > 0)
6627 free(id_refs[--id_refs_size]);
6629 return run_io_load(ls_remote_argv, "\t", read_ref);
6630 }
6632 static void
6633 set_repo_config_option(char *name, char *value, int (*cmd)(int, const char **))
6634 {
6635 const char *argv[SIZEOF_ARG] = { name, "=" };
6636 int argc = 1 + (cmd == option_set_command);
6637 int error = ERR;
6639 if (!argv_from_string(argv, &argc, value))
6640 config_msg = "Too many option arguments";
6641 else
6642 error = cmd(argc, argv);
6644 if (error == ERR)
6645 warn("Option 'tig.%s': %s", name, config_msg);
6646 }
6648 static int
6649 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
6650 {
6651 if (!strcmp(name, "i18n.commitencoding"))
6652 string_ncopy(opt_encoding, value, valuelen);
6654 if (!strcmp(name, "core.editor"))
6655 string_ncopy(opt_editor, value, valuelen);
6657 if (!prefixcmp(name, "tig.color."))
6658 set_repo_config_option(name + 10, value, option_color_command);
6660 else if (!prefixcmp(name, "tig.bind."))
6661 set_repo_config_option(name + 9, value, option_bind_command);
6663 else if (!prefixcmp(name, "tig."))
6664 set_repo_config_option(name + 4, value, option_set_command);
6666 /* branch.<head>.remote */
6667 if (*opt_head &&
6668 !strncmp(name, "branch.", 7) &&
6669 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6670 !strcmp(name + 7 + strlen(opt_head), ".remote"))
6671 string_ncopy(opt_remote, value, valuelen);
6673 if (*opt_head && *opt_remote &&
6674 !strncmp(name, "branch.", 7) &&
6675 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6676 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
6677 size_t from = strlen(opt_remote);
6679 if (!prefixcmp(value, "refs/heads/")) {
6680 value += STRING_SIZE("refs/heads/");
6681 valuelen -= STRING_SIZE("refs/heads/");
6682 }
6684 if (!string_format_from(opt_remote, &from, "/%s", value))
6685 opt_remote[0] = 0;
6686 }
6688 return OK;
6689 }
6691 static int
6692 load_git_config(void)
6693 {
6694 const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
6696 return run_io_load(config_list_argv, "=", read_repo_config_option);
6697 }
6699 static int
6700 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
6701 {
6702 if (!opt_git_dir[0]) {
6703 string_ncopy(opt_git_dir, name, namelen);
6705 } else if (opt_is_inside_work_tree == -1) {
6706 /* This can be 3 different values depending on the
6707 * version of git being used. If git-rev-parse does not
6708 * understand --is-inside-work-tree it will simply echo
6709 * the option else either "true" or "false" is printed.
6710 * Default to true for the unknown case. */
6711 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6713 } else if (*name == '.') {
6714 string_ncopy(opt_cdup, name, namelen);
6716 } else {
6717 string_ncopy(opt_prefix, name, namelen);
6718 }
6720 return OK;
6721 }
6723 static int
6724 load_repo_info(void)
6725 {
6726 const char *head_argv[] = {
6727 "git", "symbolic-ref", "HEAD", NULL
6728 };
6729 const char *rev_parse_argv[] = {
6730 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6731 "--show-cdup", "--show-prefix", NULL
6732 };
6734 if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
6735 chomp_string(opt_head);
6736 if (!prefixcmp(opt_head, "refs/heads/")) {
6737 char *offset = opt_head + STRING_SIZE("refs/heads/");
6739 memmove(opt_head, offset, strlen(offset) + 1);
6740 }
6741 }
6743 return run_io_load(rev_parse_argv, "=", read_repo_info);
6744 }
6747 /*
6748 * Main
6749 */
6751 static const char usage[] =
6752 "tig " TIG_VERSION " (" __DATE__ ")\n"
6753 "\n"
6754 "Usage: tig [options] [revs] [--] [paths]\n"
6755 " or: tig show [options] [revs] [--] [paths]\n"
6756 " or: tig blame [rev] path\n"
6757 " or: tig status\n"
6758 " or: tig < [git command output]\n"
6759 "\n"
6760 "Options:\n"
6761 " -v, --version Show version and exit\n"
6762 " -h, --help Show help message and exit";
6764 static void __NORETURN
6765 quit(int sig)
6766 {
6767 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6768 if (cursed)
6769 endwin();
6770 exit(0);
6771 }
6773 static void __NORETURN
6774 die(const char *err, ...)
6775 {
6776 va_list args;
6778 endwin();
6780 va_start(args, err);
6781 fputs("tig: ", stderr);
6782 vfprintf(stderr, err, args);
6783 fputs("\n", stderr);
6784 va_end(args);
6786 exit(1);
6787 }
6789 static void
6790 warn(const char *msg, ...)
6791 {
6792 va_list args;
6794 va_start(args, msg);
6795 fputs("tig warning: ", stderr);
6796 vfprintf(stderr, msg, args);
6797 fputs("\n", stderr);
6798 va_end(args);
6799 }
6801 static enum request
6802 parse_options(int argc, const char *argv[])
6803 {
6804 enum request request = REQ_VIEW_MAIN;
6805 const char *subcommand;
6806 bool seen_dashdash = FALSE;
6807 /* XXX: This is vulnerable to the user overriding options
6808 * required for the main view parser. */
6809 const char *custom_argv[SIZEOF_ARG] = {
6810 "git", "log", "--no-color", "--pretty=raw", "--parents",
6811 "--topo-order", NULL
6812 };
6813 int i, j = 6;
6815 if (!isatty(STDIN_FILENO)) {
6816 io_open(&VIEW(REQ_VIEW_PAGER)->io, "");
6817 return REQ_VIEW_PAGER;
6818 }
6820 if (argc <= 1)
6821 return REQ_NONE;
6823 subcommand = argv[1];
6824 if (!strcmp(subcommand, "status")) {
6825 if (argc > 2)
6826 warn("ignoring arguments after `%s'", subcommand);
6827 return REQ_VIEW_STATUS;
6829 } else if (!strcmp(subcommand, "blame")) {
6830 if (argc <= 2 || argc > 4)
6831 die("invalid number of options to blame\n\n%s", usage);
6833 i = 2;
6834 if (argc == 4) {
6835 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
6836 i++;
6837 }
6839 string_ncopy(opt_file, argv[i], strlen(argv[i]));
6840 return REQ_VIEW_BLAME;
6842 } else if (!strcmp(subcommand, "show")) {
6843 request = REQ_VIEW_DIFF;
6845 } else {
6846 subcommand = NULL;
6847 }
6849 if (subcommand) {
6850 custom_argv[1] = subcommand;
6851 j = 2;
6852 }
6854 for (i = 1 + !!subcommand; i < argc; i++) {
6855 const char *opt = argv[i];
6857 if (seen_dashdash || !strcmp(opt, "--")) {
6858 seen_dashdash = TRUE;
6860 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
6861 printf("tig version %s\n", TIG_VERSION);
6862 quit(0);
6864 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
6865 printf("%s\n", usage);
6866 quit(0);
6867 }
6869 custom_argv[j++] = opt;
6870 if (j >= ARRAY_SIZE(custom_argv))
6871 die("command too long");
6872 }
6874 if (!prepare_update(VIEW(request), custom_argv, NULL, FORMAT_NONE))
6875 die("Failed to format arguments");
6877 return request;
6878 }
6880 int
6881 main(int argc, const char *argv[])
6882 {
6883 enum request request = parse_options(argc, argv);
6884 struct view *view;
6885 size_t i;
6887 signal(SIGINT, quit);
6889 if (setlocale(LC_ALL, "")) {
6890 char *codeset = nl_langinfo(CODESET);
6892 string_ncopy(opt_codeset, codeset, strlen(codeset));
6893 }
6895 if (load_repo_info() == ERR)
6896 die("Failed to load repo info.");
6898 if (load_options() == ERR)
6899 die("Failed to load user config.");
6901 if (load_git_config() == ERR)
6902 die("Failed to load repo config.");
6904 /* Require a git repository unless when running in pager mode. */
6905 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6906 die("Not a git repository");
6908 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6909 opt_utf8 = FALSE;
6911 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6912 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6913 if (opt_iconv == ICONV_NONE)
6914 die("Failed to initialize character set conversion");
6915 }
6917 if (load_refs() == ERR)
6918 die("Failed to load refs.");
6920 foreach_view (view, i)
6921 argv_from_env(view->ops->argv, view->cmd_env);
6923 init_display();
6925 if (request != REQ_NONE)
6926 open_view(NULL, request, OPEN_PREPARED);
6927 request = request == REQ_NONE ? REQ_VIEW_MAIN : REQ_NONE;
6929 while (view_driver(display[current_view], request)) {
6930 int key = get_input(0);
6932 view = display[current_view];
6933 request = get_keybinding(view->keymap, key);
6935 /* Some low-level request handling. This keeps access to
6936 * status_win restricted. */
6937 switch (request) {
6938 case REQ_PROMPT:
6939 {
6940 char *cmd = read_prompt(":");
6942 if (cmd && isdigit(*cmd)) {
6943 int lineno = view->lineno + 1;
6945 if (parse_int(&lineno, cmd, 1, view->lines + 1) == OK) {
6946 select_view_line(view, lineno - 1);
6947 report("");
6948 } else {
6949 report("Unable to parse '%s' as a line number", cmd);
6950 }
6952 } else if (cmd) {
6953 struct view *next = VIEW(REQ_VIEW_PAGER);
6954 const char *argv[SIZEOF_ARG] = { "git" };
6955 int argc = 1;
6957 /* When running random commands, initially show the
6958 * command in the title. However, it maybe later be
6959 * overwritten if a commit line is selected. */
6960 string_ncopy(next->ref, cmd, strlen(cmd));
6962 if (!argv_from_string(argv, &argc, cmd)) {
6963 report("Too many arguments");
6964 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
6965 report("Failed to format command");
6966 } else {
6967 open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
6968 }
6969 }
6971 request = REQ_NONE;
6972 break;
6973 }
6974 case REQ_SEARCH:
6975 case REQ_SEARCH_BACK:
6976 {
6977 const char *prompt = request == REQ_SEARCH ? "/" : "?";
6978 char *search = read_prompt(prompt);
6980 if (search)
6981 string_ncopy(opt_search, search, strlen(search));
6982 else if (*opt_search)
6983 request = request == REQ_SEARCH ?
6984 REQ_FIND_NEXT :
6985 REQ_FIND_PREV;
6986 else
6987 request = REQ_NONE;
6988 break;
6989 }
6990 default:
6991 break;
6992 }
6993 }
6995 quit(0);
6997 return 0;
6998 }