?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
Use file and line number information when loading blame for commit
[tig.git] / tig.c
blobfb6231f256fbbfbcbb1545dc7caaa6d0a69dd3c1
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 */
13
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
17
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
21
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
25
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>
41
42 #include <regex.h>
43
44 #include <locale.h>
45 #include <langinfo.h>
46 #include <iconv.h>
47
48 /* ncurses(3): Must be defined to have extended wide-character functions. */
49 #define _XOPEN_SOURCE_EXTENDED
50
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
60
61 #if __GNUC__ >= 3
62 #define __NORETURN __attribute__((__noreturn__))
63 #else
64 #define __NORETURN
65 #endif
66
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);
73
74 #define ABS(x) ((x) >= 0 ? (x) : -(x))
75 #define MIN(x, y) ((x) < (y) ? (x) : (y))
76
77 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
78 #define STRING_SIZE(x) (sizeof(x) - 1)
79
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. */
84
85 /* Revision graph */
86
87 #define REVGRAPH_INIT 'I'
88 #define REVGRAPH_MERGE 'M'
89 #define REVGRAPH_BRANCH '+'
90 #define REVGRAPH_COMMIT '*'
91 #define REVGRAPH_BOUND '^'
92
93 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
94
95 /* This color name can be used to refer to the default term colors. */
96 #define COLOR_DEFAULT (-1)
97
98 #define ICONV_NONE ((iconv_t) -1)
99 #ifndef ICONV_CONST
100 #define ICONV_CONST /* nothing */
101 #endif
102
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 ")
106
107 #define AUTHOR_COLS 20
108 #define ID_COLS 8
109
110 /* The default interval between line numbers. */
111 #define NUMBER_INTERVAL 5
112 #define SCROLL_INTERVAL 1
113
114 #define TAB_SIZE 8
115
116 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
117
118 #define NULL_ID "0000000000000000000000000000000000000000"
119
120 #ifndef GIT_CONFIG
121 #define GIT_CONFIG "config"
122 #endif
123
124 /* Some ASCII-shorthands fitted into the ncurses namespace. */
125 #define KEY_TAB '\t'
126 #define KEY_RETURN '\r'
127 #define KEY_ESC 27
128
129
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 };
140
141 static struct ref **get_refs(const char *id);
142
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 };
148
149 static bool format_argv(const char *dst[], const char *src[], enum format_flags flags);
150
151 enum input_status {
152 INPUT_OK,
153 INPUT_SKIP,
154 INPUT_STOP,
155 INPUT_CANCEL
156 };
157
158 typedef enum input_status (*input_handler)(void *data, char *buf, int c);
159
160 static char *prompt_input(const char *prompt, input_handler handler, void *data);
161 static bool prompt_yesno(const char *prompt);
162
163 /*
164 * String helpers
165 */
166
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;
172
173 strncpy(dst, src, srclen);
174 dst[srclen] = 0;
175 }
176
177 /* Shorthands for safely copying into a fixed buffer. */
178
179 #define string_copy(dst, src) \
180 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
181
182 #define string_ncopy(dst, src, srclen) \
183 string_ncopy_do(dst, sizeof(dst), src, srclen)
184
185 #define string_copy_rev(dst, src) \
186 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
187
188 #define string_add(dst, from, src) \
189 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
190
191 static void
192 string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
193 {
194 size_t size, pos;
195
196 for (size = pos = 0; size < dstlen - 1 && src[pos]; pos++) {
197 if (src[pos] == '\t') {
198 size_t expanded = tabsize - (size % tabsize);
199
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 }
208
209 dst[size] = 0;
210 }
211
212 static char *
213 chomp_string(char *name)
214 {
215 int namelen;
216
217 while (isspace(*name))
218 name++;
219
220 namelen = strlen(name) - 1;
221 while (namelen > 0 && isspace(name[namelen]))
222 name[namelen--] = 0;
223
224 return name;
225 }
226
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;
232
233 va_start(args, fmt);
234 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
235 va_end(args);
236
237 if (bufpos)
238 *bufpos = pos;
239
240 return pos >= bufsize ? FALSE : TRUE;
241 }
242
243 #define string_format(buf, fmt, args...) \
244 string_nformat(buf, sizeof(buf), NULL, fmt, args)
245
246 #define string_format_from(buf, from, fmt, args...) \
247 string_nformat(buf, sizeof(buf), from, fmt, args)
248
249 static int
250 string_enum_compare(const char *str1, const char *str2, int len)
251 {
252 size_t i;
253
254 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
255
256 /* Diff-Header == DIFF_HEADER */
257 for (i = 0; i < len; i++) {
258 if (toupper(str1[i]) == toupper(str2[i]))
259 continue;
260
261 if (string_enum_sep(str1[i]) &&
262 string_enum_sep(str2[i]))
263 continue;
264
265 return str1[i] - str2[i];
266 }
267
268 return 0;
269 }
270
271 struct enum_map {
272 const char *name;
273 int namelen;
274 int value;
275 };
276
277 #define ENUM_MAP(name, value) { name, STRING_SIZE(name), value }
278
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;
284
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 }
291
292 return FALSE;
293 }
294
295 #define map_enum(attr, map, name) \
296 map_enum_do(map, ARRAY_SIZE(map), attr, name)
297
298 #define prefixcmp(str1, str2) \
299 strncmp(str1, str2, STRING_SIZE(str2))
300
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);
306
307 return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
308 }
309
310
311 static bool
312 argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
313 {
314 int valuelen;
315
316 while (*cmd && *argc < SIZEOF_ARG && (valuelen = strcspn(cmd, " \t"))) {
317 bool advance = cmd[valuelen] != 0;
318
319 cmd[valuelen] = 0;
320 argv[(*argc)++] = chomp_string(cmd);
321 cmd = chomp_string(cmd + valuelen + advance);
322 }
323
324 if (*argc < SIZEOF_ARG)
325 argv[*argc] = NULL;
326 return *argc < SIZEOF_ARG;
327 }
328
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;
334
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 }
340
341
342 /*
343 * Executing external commands.
344 */
345
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 };
354
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 };
368
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 }
379
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 }
387
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 }
395
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 }
403
404 static bool
405 kill_io(struct io *io)
406 {
407 return io->pid == 0 || kill(io->pid, SIGKILL) != -1;
408 }
409
410 static bool
411 done_io(struct io *io)
412 {
413 pid_t pid = io->pid;
414
415 if (io->pipe != -1)
416 close(io->pipe);
417 free(io->buf);
418 reset_io(io);
419
420 while (pid > 0) {
421 int status;
422 pid_t waiting = waitpid(pid, &status, 0);
423
424 if (waiting < 0) {
425 if (errno == EINTR)
426 continue;
427 report("waitpid failed (%s)", strerror(errno));
428 return FALSE;
429 }
430
431 return waiting == pid &&
432 !WIFSIGNALED(status) &&
433 WIFEXITED(status) &&
434 !WEXITSTATUS(status);
435 }
436
437 return TRUE;
438 }
439
440 static bool
441 start_io(struct io *io)
442 {
443 int pipefds[2] = { -1, -1 };
444
445 if (io->type == IO_FD)
446 return TRUE;
447
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;
453
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 }
461
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;
468
469 dup2(readfd, STDIN_FILENO);
470 dup2(writefd, STDOUT_FILENO);
471 dup2(devnull, STDERR_FILENO);
472
473 close(devnull);
474 if (pipefds[0] != -1)
475 close(pipefds[0]);
476 if (pipefds[1] != -1)
477 close(pipefds[1]);
478 }
479
480 if (io->dir && *io->dir && chdir(io->dir) == -1)
481 die("Failed to change directory: %s", strerror(errno));
482
483 execvp(io->argv[0], (char *const*) io->argv);
484 die("Failed to execute program: %s", strerror(errno));
485 }
486
487 if (pipefds[!!(io->type == IO_WR)] != -1)
488 close(pipefds[!!(io->type == IO_WR)]);
489 return FALSE;
490 }
491
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 }
500
501 static int
502 run_io_do(struct io *io)
503 {
504 return start_io(io) && done_io(io);
505 }
506
507 static int
508 run_io_bg(const char **argv)
509 {
510 struct io io = {};
511
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 }
517
518 static bool
519 run_io_fg(const char **argv, const char *dir)
520 {
521 struct io io = {};
522
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 }
528
529 static bool
530 run_io_append(const char **argv, enum format_flags flags, int fd)
531 {
532 struct io io = {};
533
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 }
541
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 }
547
548 static bool
549 io_eof(struct io *io)
550 {
551 return io->eof;
552 }
553
554 static int
555 io_error(struct io *io)
556 {
557 return io->error;
558 }
559
560 static bool
561 io_strerror(struct io *io)
562 {
563 return strerror(io->error);
564 }
565
566 static bool
567 io_can_read(struct io *io)
568 {
569 struct timeval tv = { 0, 500 };
570 fd_set fds;
571
572 FD_ZERO(&fds);
573 FD_SET(io->pipe, &fds);
574
575 return select(io->pipe + 1, &fds, NULL, NULL, &tv) > 0;
576 }
577
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);
583
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 }
593
594 static char *
595 io_get(struct io *io, int c, bool can_read)
596 {
597 char *eol;
598 ssize_t readsize;
599
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 }
607
608 while (TRUE) {
609 if (io->bufsize > 0) {
610 eol = memchr(io->bufpos, c, io->bufsize);
611 if (eol) {
612 char *line = io->bufpos;
613
614 *eol = 0;
615 io->bufpos = eol + 1;
616 io->bufsize -= io->bufpos - line;
617 return line;
618 }
619 }
620
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 }
629
630 if (!can_read)
631 return NULL;
632
633 if (io->bufsize > 0 && io->bufpos > io->buf)
634 memmove(io->buf, io->bufpos, io->bufsize);
635
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 }
643
644 static bool
645 io_write(struct io *io, const void *buf, size_t bufsize)
646 {
647 size_t written = 0;
648
649 while (!io_error(io) && written < bufsize) {
650 ssize_t size;
651
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 }
660
661 return written == bufsize;
662 }
663
664 static bool
665 io_read_buf(struct io *io, char buf[], size_t bufsize)
666 {
667 bool error;
668
669 io->buf = io->bufpos = buf;
670 io->bufalloc = bufsize;
671 error = !io_get(io, '\n', TRUE) && io_error(io);
672 io->buf = NULL;
673
674 return done_io(io) || error;
675 }
676
677 static bool
678 run_io_buf(const char **argv, char buf[], size_t bufsize)
679 {
680 struct io io = {};
681
682 return run_io_rd(&io, argv, FORMAT_NONE) && io_read_buf(&io, buf, bufsize);
683 }
684
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;
691
692 if (!start_io(io))
693 return ERR;
694
695 while (state == OK && (name = io_get(io, '\n', TRUE))) {
696 char *value;
697 size_t namelen;
698 size_t valuelen;
699
700 name = chomp_string(name);
701 namelen = strcspn(name, separators);
702
703 if (name[namelen]) {
704 name[namelen] = 0;
705 value = chomp_string(name + namelen + 1);
706 valuelen = strlen(value);
707
708 } else {
709 value = "";
710 valuelen = 0;
711 }
712
713 state = read_property(name, namelen, value, valuelen);
714 }
715
716 if (state != ERR && io_error(io))
717 state = ERR;
718 done_io(io);
719
720 return state;
721 }
722
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 = {};
728
729 return init_io_rd(&io, argv, NULL, FORMAT_NONE)
730 ? io_load(&io, separators, read_property) : ERR;
731 }
732
733
734 /*
735 * User requests
736 */
737
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")
805
806
807 /* User action requests. */
808 enum request {
809 #define REQ_GROUP(help)
810 #define REQ_(req, help) REQ_##req
811
812 /* Offset all requests to avoid conflicts with ncurses getch values. */
813 REQ_OFFSET = KEY_MAX + 1,
814 REQ_INFO
815
816 #undef REQ_GROUP
817 #undef REQ_
818 };
819
820 struct request_info {
821 enum request request;
822 const char *name;
823 int namelen;
824 const char *help;
825 };
826
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 };
834
835 static enum request
836 get_request(const char *name)
837 {
838 int namelen = strlen(name);
839 int i;
840
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;
845
846 return REQ_NONE;
847 }
848
849
850 /*
851 * Options
852 */
853
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;
881
882 #define is_initial_commit() (!*opt_head_rev)
883 #define is_head_commit(rev) (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
884
885
886 /*
887 * Line-oriented content detection.
888 */
889
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)
946
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 };
954
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 };
962
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 };
969
970 static enum line_type
971 get_line_type(const char *line)
972 {
973 int linelen = strlen(line);
974 enum line_type type;
975
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;
981
982 return LINE_DEFAULT;
983 }
984
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 }
991
992 static struct line_info *
993 get_line_info(const char *name)
994 {
995 size_t namelen = strlen(name);
996 enum line_type type;
997
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];
1002
1003 return NULL;
1004 }
1005
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;
1012
1013 start_color();
1014
1015 if (assume_default_colors(default_fg, default_bg) == ERR) {
1016 default_bg = COLOR_BLACK;
1017 default_fg = COLOR_WHITE;
1018 }
1019
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;
1024
1025 init_pair(type, fg, bg);
1026 }
1027 }
1028
1029 struct line {
1030 enum line_type type;
1031
1032 /* State flags */
1033 unsigned int selected:1;
1034 unsigned int dirty:1;
1035 unsigned int cleareol:1;
1036
1037 void *data; /* User data */
1038 };
1039
1040
1041 /*
1042 * Keys
1043 */
1044
1045 struct keybinding {
1046 int alias;
1047 enum request request;
1048 };
1049
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 },
1062
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 },
1072
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 },
1083
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 },
1091
1092 /* Searching */
1093 { '/', REQ_SEARCH },
1094 { '?', REQ_SEARCH_BACK },
1095 { 'n', REQ_FIND_NEXT },
1096 { 'N', REQ_FIND_PREV },
1097
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 };
1116
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)
1129
1130 enum keymap {
1131 #define KEYMAP_(name) KEYMAP_##name
1132 KEYMAP_INFO
1133 #undef KEYMAP_
1134 };
1135
1136 static struct enum_map keymap_table[] = {
1137 #define KEYMAP_(name) ENUM_MAP(#name, KEYMAP_##name)
1138 KEYMAP_INFO
1139 #undef KEYMAP_
1140 };
1141
1142 #define set_keymap(map, name) map_enum(map, keymap_table, name)
1143
1144 struct keybinding_table {
1145 struct keybinding *data;
1146 size_t size;
1147 };
1148
1149 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
1150
1151 static void
1152 add_keybinding(enum keymap keymap, enum request request, int key)
1153 {
1154 struct keybinding_table *table = &keybindings[keymap];
1155
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 }
1162
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;
1169
1170 for (i = 0; i < keybindings[keymap].size; i++)
1171 if (keybindings[keymap].data[i].alias == key)
1172 return keybindings[keymap].data[i].request;
1173
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;
1177
1178 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
1179 if (default_keybindings[i].alias == key)
1180 return default_keybindings[i].request;
1181
1182 return (enum request) key;
1183 }
1184
1185
1186 struct key {
1187 const char *name;
1188 int value;
1189 };
1190
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 };
1221
1222 static int
1223 get_key_value(const char *name)
1224 {
1225 int i;
1226
1227 for (i = 0; i < ARRAY_SIZE(key_table); i++)
1228 if (!strcasecmp(key_table[i].name, name))
1229 return key_table[i].value;
1230
1231 if (strlen(name) == 1 && isprint(*name))
1232 return (int) *name;
1233
1234 return ERR;
1235 }
1236
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;
1243
1244 for (key = 0; key < ARRAY_SIZE(key_table); key++)
1245 if (key_table[key].value == key_value)
1246 seq = key_table[key].name;
1247
1248 if (seq == NULL &&
1249 key_value < 127 &&
1250 isprint(key_value)) {
1251 key_char[1] = (char) key_value;
1252 seq = key_char;
1253 }
1254
1255 return seq ? seq : "(no key)";
1256 }
1257
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;
1265
1266 buf[pos] = 0;
1267
1268 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
1269 struct keybinding *keybinding = &default_keybindings[i];
1270
1271 if (keybinding->request != request)
1272 continue;
1273
1274 if (!string_format_from(buf, &pos, "%s%s", sep,
1275 get_key_name(keybinding->alias)))
1276 return "Too many keybindings!";
1277 sep = ", ";
1278 }
1279
1280 return buf;
1281 }
1282
1283 struct run_request {
1284 enum keymap keymap;
1285 int key;
1286 const char *argv[SIZEOF_ARG];
1287 };
1288
1289 static struct run_request *run_request;
1290 static size_t run_requests;
1291
1292 static enum request
1293 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
1294 {
1295 struct run_request *req;
1296
1297 if (argc >= ARRAY_SIZE(req->argv) - 1)
1298 return REQ_NONE;
1299
1300 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1301 if (!req)
1302 return REQ_NONE;
1303
1304 run_request = req;
1305 req = &run_request[run_requests];
1306 req->keymap = keymap;
1307 req->key = key;
1308 req->argv[0] = NULL;
1309
1310 if (!format_argv(req->argv, argv, FORMAT_NONE))
1311 return REQ_NONE;
1312
1313 return REQ_NONE + ++run_requests;
1314 }
1315
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 }
1323
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;
1339
1340 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1341 enum request req;
1342
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 }
1348
1349 /*
1350 * User config file handling.
1351 */
1352
1353 static int config_lineno;
1354 static bool config_errors;
1355 static const char *config_msg;
1356
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 };
1369
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 };
1380
1381 #define set_attribute(attr, name) map_enum(attr, attr_map, name)
1382
1383 static int
1384 parse_int(int *opt, const char *arg, int min, int max)
1385 {
1386 int value = atoi(arg);
1387
1388 if (min <= value && value <= max) {
1389 *opt = value;
1390 return OK;
1391 }
1392
1393 config_msg = "Integer value out of bound";
1394 return ERR;
1395 }
1396
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 }
1406
1407 /* Wants: object fgcolor bgcolor [attribute] */
1408 static int
1409 option_color_command(int argc, const char *argv[])
1410 {
1411 struct line_info *info;
1412
1413 if (argc != 3 && argc != 4) {
1414 config_msg = "Wrong number of arguments given to color command";
1415 return ERR;
1416 }
1417
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;
1426
1427 if (!map_enum(&index, obsolete, argv[0])) {
1428 config_msg = "Unknown color name";
1429 return ERR;
1430 }
1431 info = &line_info[index];
1432 }
1433
1434 if (!set_color(&info->fg, argv[1]) ||
1435 !set_color(&info->bg, argv[2])) {
1436 config_msg = "Unknown color";
1437 return ERR;
1438 }
1439
1440 if (argc == 4 && !set_attribute(&info->attr, argv[3])) {
1441 config_msg = "Unknown attribute";
1442 return ERR;
1443 }
1444
1445 return OK;
1446 }
1447
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 }
1454
1455 static int
1456 parse_string(char *opt, const char *arg, size_t optsize)
1457 {
1458 int arglen = strlen(arg);
1459
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 }
1473
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 }
1482
1483 if (strcmp(argv[1], "=")) {
1484 config_msg = "No value assigned";
1485 return ERR;
1486 }
1487
1488 if (!strcmp(argv[0], "show-author"))
1489 return parse_bool(&opt_author, argv[2]);
1490
1491 if (!strcmp(argv[0], "show-date"))
1492 return parse_bool(&opt_date, argv[2]);
1493
1494 if (!strcmp(argv[0], "show-rev-graph"))
1495 return parse_bool(&opt_rev_graph, argv[2]);
1496
1497 if (!strcmp(argv[0], "show-refs"))
1498 return parse_bool(&opt_show_refs, argv[2]);
1499
1500 if (!strcmp(argv[0], "show-line-numbers"))
1501 return parse_bool(&opt_line_number, argv[2]);
1502
1503 if (!strcmp(argv[0], "line-graphics"))
1504 return parse_bool(&opt_line_graphics, argv[2]);
1505
1506 if (!strcmp(argv[0], "line-number-interval"))
1507 return parse_int(&opt_num_interval, argv[2], 1, 1024);
1508
1509 if (!strcmp(argv[0], "author-width"))
1510 return parse_int(&opt_author_cols, argv[2], 0, 1024);
1511
1512 if (!strcmp(argv[0], "tab-size"))
1513 return parse_int(&opt_tab_size, argv[2], 1, 1024);
1514
1515 if (!strcmp(argv[0], "commit-encoding"))
1516 return parse_string(opt_encoding, argv[2], sizeof(opt_encoding));
1517
1518 config_msg = "Unknown variable name";
1519 return ERR;
1520 }
1521
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;
1529
1530 if (argc < 3) {
1531 config_msg = "Wrong number of arguments given to bind command";
1532 return ERR;
1533 }
1534
1535 if (set_keymap(&keymap, argv[0]) == ERR) {
1536 config_msg = "Unknown key map";
1537 return ERR;
1538 }
1539
1540 key = get_key_value(argv[1]);
1541 if (key == ERR) {
1542 config_msg = "Unknown key";
1543 return ERR;
1544 }
1545
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;
1554
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 }
1568
1569 add_keybinding(keymap, request, key);
1570
1571 return OK;
1572 }
1573
1574 static int
1575 set_option(const char *opt, char *value)
1576 {
1577 const char *argv[SIZEOF_ARG];
1578 int argc = 0;
1579
1580 if (!argv_from_string(argv, &argc, value)) {
1581 config_msg = "Too many option arguments";
1582 return ERR;
1583 }
1584
1585 if (!strcmp(opt, "color"))
1586 return option_color_command(argc, argv);
1587
1588 if (!strcmp(opt, "set"))
1589 return option_set_command(argc, argv);
1590
1591 if (!strcmp(opt, "bind"))
1592 return option_bind_command(argc, argv);
1593
1594 config_msg = "Unknown option command";
1595 return ERR;
1596 }
1597
1598 static int
1599 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1600 {
1601 int status = OK;
1602
1603 config_lineno++;
1604 config_msg = "Internal error";
1605
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;
1611
1612 if (opt[optlen] != 0) {
1613 config_msg = "No option value";
1614 status = ERR;
1615
1616 } else {
1617 /* Look for comment endings in the value. */
1618 size_t len = strcspn(value, "#");
1619
1620 if (len < valuelen) {
1621 valuelen = len;
1622 value[valuelen] = 0;
1623 }
1624
1625 status = set_option(opt, value);
1626 }
1627
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 }
1633
1634 /* Always keep going if errors are encountered. */
1635 return OK;
1636 }
1637
1638 static void
1639 load_option_file(const char *path)
1640 {
1641 struct io io = {};
1642
1643 /* It's OK that the file doesn't exist. */
1644 if (!io_open(&io, path))
1645 return;
1646
1647 config_lineno = 0;
1648 config_errors = FALSE;
1649
1650 if (io_load(&io, " \t", read_option) == ERR ||
1651 config_errors == TRUE)
1652 warn("Errors while loading %s.", path);
1653 }
1654
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];
1662
1663 add_builtin_run_requests();
1664
1665 if (!tigrc_system)
1666 tigrc_system = SYSCONFDIR "/tigrc";
1667 load_option_file(tigrc_system);
1668
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);
1675
1676 return OK;
1677 }
1678
1679
1680 /*
1681 * The viewer
1682 */
1683
1684 struct view;
1685 struct view_ops;
1686
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;
1690
1691 #define foreach_displayed_view(view, i) \
1692 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1693
1694 #define displayed_views() (display[1] != NULL ? 2 : 1)
1695
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";
1700
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} */
1705
1706 struct view_ops *ops; /* View operations */
1707
1708 enum keymap keymap; /* What keymap does this view have */
1709 bool git_dir; /* Whether the view requires a git directory. */
1710
1711 char ref[SIZEOF_REF]; /* Hovered commit reference */
1712 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1713
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 */
1717
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. */
1726
1727 /* Searching */
1728 char grep[SIZEOF_STR]; /* Search string */
1729 regex_t *regex; /* Pre-compiled regexp */
1730
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;
1734
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. */
1740
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. */
1747
1748 /* Loading */
1749 struct io io;
1750 struct io *pipe;
1751 time_t start_time;
1752 time_t update_secs;
1753 };
1754
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 };
1773
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;
1784
1785 #define VIEW_STR(name, env, ref, ops, map, git) \
1786 { name, #env, ref, ops, map, git }
1787
1788 #define VIEW_(id, name, ops, git, ref) \
1789 VIEW_STR(name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1790
1791
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 };
1804
1805 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1806 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1807
1808 #define foreach_view(view, i) \
1809 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1810
1811 #define view_is_displayed(view) \
1812 (view == display[0] || view == display[1])
1813
1814
1815 enum line_graphic {
1816 LINE_GRAPHIC_VLINE
1817 };
1818
1819 static int line_graphics[] = {
1820 /* LINE_GRAPHIC_VLINE: */ '|'
1821 };
1822
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 }
1832
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;
1841
1842 if (max_len <= 0)
1843 return 0;
1844
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 }
1857
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 }
1866
1867 if (view->col + col >= view->width + view->yoffset)
1868 view->can_hscroll = TRUE;
1869
1870 return col;
1871 }
1872
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;
1878
1879 spaces = MIN(max, spaces);
1880
1881 while (spaces > 0) {
1882 int len = MIN(spaces, sizeof(space) - 1);
1883
1884 col += draw_chars(view, type, space, spaces, FALSE);
1885 spaces -= len;
1886 }
1887
1888 return col;
1889 }
1890
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;
1900
1901 if (max < max_number)
1902 max_number = max;
1903
1904 lineno += view->offset + 1;
1905 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1906 static char fmt[] = "%1ld";
1907
1908 if (view->digits <= 9)
1909 fmt[1] = '0' + digits3;
1910
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 }
1917
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++;
1923
1924 view->col += col;
1925 if (col < max && skip <= col)
1926 col = draw_space(view, LINE_DEFAULT, max - col, 1);
1927 view->col++;
1928
1929 return view->width + view->yoffset <= view->col;
1930 }
1931
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 }
1938
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;
1945
1946 if (max < size)
1947 size = max;
1948
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]);
1954
1955 view->col += size;
1956 if (size < max && skip <= size)
1957 waddch(view->win, ' ');
1958 view->col++;
1959
1960 return view->width - view->col <= 0;
1961 }
1962
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;
1968
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);
1973
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 }
1978
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;
1985
1986 if (time)
1987 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
1988 date = timelen ? buf : NULL;
1989
1990 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
1991 }
1992
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;
1997
1998 if (!trim) {
1999 static char initials[10];
2000 size_t pos;
2001
2002 #define is_initial_sep(c) (isspace(c) || ispunct(c) || (c) == '@')
2003
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 }
2012
2013 author = initials;
2014 }
2015
2016 return draw_field(view, LINE_AUTHOR, author, opt_author_cols, trim);
2017 }
2018
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;
2027
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;
2036
2037 return draw_field(view, LINE_MODE, str, sizeof(file_mode), FALSE);
2038 }
2039
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);
2045
2046 assert(view_is_displayed(view));
2047
2048 if (view->offset + lineno >= view->lines)
2049 return FALSE;
2050
2051 line = &view->line[view->offset + lineno];
2052
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;
2061
2062 if (selected) {
2063 set_view_attr(view, LINE_CURSOR);
2064 line->selected = TRUE;
2065 view->ops->select(view, line);
2066 }
2067
2068 return view->ops->draw(view, line, lineno);
2069 }
2070
2071 static void
2072 redraw_view_dirty(struct view *view)
2073 {
2074 bool dirty = FALSE;
2075 int lineno;
2076
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 }
2086
2087 if (!dirty)
2088 return;
2089 wnoutrefresh(view->win);
2090 }
2091
2092 static void
2093 redraw_view_from(struct view *view, int lineno)
2094 {
2095 assert(0 <= lineno && lineno < view->height);
2096
2097 if (lineno == 0)
2098 view->can_hscroll = FALSE;
2099
2100 for (; lineno < view->height; lineno++) {
2101 if (!draw_view_line(view, lineno))
2102 break;
2103 }
2104
2105 wnoutrefresh(view->win);
2106 }
2107
2108 static void
2109 redraw_view(struct view *view)
2110 {
2111 werase(view->win);
2112 redraw_view_from(view, 0);
2113 }
2114
2115
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;
2122
2123 assert(view_is_displayed(view));
2124
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;
2130
2131 string_format_from(state, &statelen, " - %s %d of %d (%d%%)",
2132 view->ops->type,
2133 view->lineno + 1,
2134 view->lines,
2135 lines);
2136
2137 }
2138
2139 if (view->pipe) {
2140 time_t secs = time(NULL) - view->start_time;
2141
2142 /* Three git seconds are a long time ... */
2143 if (secs > 2)
2144 string_format_from(state, &statelen, " loading %lds", secs);
2145 }
2146
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;
2151
2152 if (minsize < view->width)
2153 refsize = view->width - minsize + 7;
2154 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
2155 }
2156
2157 if (statelen && bufpos < view->width) {
2158 string_format_from(buf, &bufpos, "%s", state);
2159 }
2160
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));
2165
2166 mvwaddnstr(view->title, 0, 0, buf, bufpos);
2167 wclrtoeol(view->title);
2168 wnoutrefresh(view->title);
2169 }
2170
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];
2177
2178 /* Setup window dimensions */
2179
2180 getmaxyx(stdscr, base->height, base->width);
2181
2182 /* Make room for the status window. */
2183 base->height -= 1;
2184
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;
2190
2191 /* Make room for the title bar. */
2192 view->height -= 1;
2193 }
2194
2195 /* Make room for the title bar. */
2196 base->height -= 1;
2197
2198 offset = 0;
2199
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);
2205
2206 scrollok(view->win, FALSE);
2207
2208 view->title = newwin(1, 0, offset + view->height, 0);
2209 if (!view->title)
2210 die("Failed to create title window");
2211
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 }
2217
2218 offset += view->height + 1;
2219 }
2220 }
2221
2222 static void
2223 redraw_display(bool clear)
2224 {
2225 struct view *view;
2226 int i;
2227
2228 foreach_displayed_view (view, i) {
2229 if (clear)
2230 wclear(view->win);
2231 redraw_view(view);
2232 update_view_title(view);
2233 }
2234 }
2235
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 }
2243
2244 /*
2245 * Navigation
2246 */
2247
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;
2253
2254 if (offset > lineno || offset + view->height <= lineno) {
2255 unsigned long half = view->height / 2;
2256
2257 if (lineno > half)
2258 offset = lineno - half;
2259 else
2260 offset = 0;
2261 }
2262
2263 if (offset != view->offset || lineno != view->lineno) {
2264 view->offset = offset;
2265 view->lineno = lineno;
2266 return TRUE;
2267 }
2268
2269 return FALSE;
2270 }
2271
2272 /* Scrolling backend */
2273 static void
2274 do_scroll_view(struct view *view, int lines)
2275 {
2276 bool redraw_current_line = FALSE;
2277
2278 /* The rendering expects the new offset. */
2279 view->offset += lines;
2280
2281 assert(0 <= view->offset && view->offset < view->lines);
2282 assert(lines);
2283
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 }
2292
2293 assert(view->offset <= view->lineno && view->lineno < view->lines);
2294
2295 /* Redraw the whole screen if scrolling is pointless. */
2296 if (view->height < ABS(lines)) {
2297 redraw_view(view);
2298
2299 } else {
2300 int line = lines > 0 ? view->height - lines : 0;
2301 int end = line + ABS(lines);
2302
2303 scrollok(view->win, TRUE);
2304 wscrl(view->win, lines);
2305 scrollok(view->win, FALSE);
2306
2307 while (line < end && draw_view_line(view, line))
2308 line++;
2309
2310 if (redraw_current_line)
2311 draw_view_line(view, view->lineno - view->offset);
2312 wnoutrefresh(view->win);
2313 }
2314
2315 view->has_scrolled = TRUE;
2316 report("");
2317 }
2318
2319 /* Scroll frontend */
2320 static void
2321 scroll_view(struct view *view, enum request request)
2322 {
2323 int lines = 1;
2324
2325 assert(view_is_displayed(view));
2326
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;
2354
2355 if (lines == 0 || view->offset + view->height >= view->lines) {
2356 report("Cannot scroll beyond the last line");
2357 return;
2358 }
2359 break;
2360
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;
2366
2367 if (lines == 0) {
2368 report("Cannot scroll beyond the first line");
2369 return;
2370 }
2371
2372 lines = -lines;
2373 break;
2374
2375 default:
2376 die("request %d not handled in switch", request);
2377 }
2378
2379 do_scroll_view(view, lines);
2380 }
2381
2382 /* Cursor moving */
2383 static void
2384 move_view(struct view *view, enum request request)
2385 {
2386 int scroll_steps = 0;
2387 int steps;
2388
2389 switch (request) {
2390 case REQ_MOVE_FIRST_LINE:
2391 steps = -view->lineno;
2392 break;
2393
2394 case REQ_MOVE_LAST_LINE:
2395 steps = view->lines - view->lineno - 1;
2396 break;
2397
2398 case REQ_MOVE_PAGE_UP:
2399 steps = view->height > view->lineno
2400 ? -view->lineno : -view->height;
2401 break;
2402
2403 case REQ_MOVE_PAGE_DOWN:
2404 steps = view->lineno + view->height >= view->lines
2405 ? view->lines - view->lineno - 1 : view->height;
2406 break;
2407
2408 case REQ_MOVE_UP:
2409 steps = -1;
2410 break;
2411
2412 case REQ_MOVE_DOWN:
2413 steps = 1;
2414 break;
2415
2416 default:
2417 die("request %d not handled in switch", request);
2418 }
2419
2420 if (steps <= 0 && view->lineno == 0) {
2421 report("Cannot move beyond the first line");
2422 return;
2423
2424 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2425 report("Cannot move beyond the last line");
2426 return;
2427 }
2428
2429 /* Move the current line */
2430 view->lineno += steps;
2431 assert(0 <= view->lineno && view->lineno < view->lines);
2432
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;
2439
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 }
2449
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 }
2456
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);
2460
2461 if (scroll_steps) {
2462 do_scroll_view(view, scroll_steps);
2463 return;
2464 }
2465
2466 /* Draw the current line */
2467 draw_view_line(view, view->lineno - view->offset);
2468
2469 wnoutrefresh(view->win);
2470 report("");
2471 }
2472
2473
2474 /*
2475 * Searching
2476 */
2477
2478 static void search_view(struct view *view, enum request request);
2479
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;
2485
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 }
2500
2501 static void
2502 find_next(struct view *view, enum request request)
2503 {
2504 unsigned long lineno = view->lineno;
2505 int direction;
2506
2507 if (!*view->grep) {
2508 if (!*opt_search)
2509 report("No previous search");
2510 else
2511 search_view(view, request);
2512 return;
2513 }
2514
2515 switch (request) {
2516 case REQ_SEARCH:
2517 case REQ_FIND_NEXT:
2518 direction = 1;
2519 break;
2520
2521 case REQ_SEARCH_BACK:
2522 case REQ_FIND_PREV:
2523 direction = -1;
2524 break;
2525
2526 default:
2527 return;
2528 }
2529
2530 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2531 lineno += direction;
2532
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 }
2542
2543 report("No match found for '%s'", view->grep);
2544 }
2545
2546 static void
2547 search_view(struct view *view, enum request request)
2548 {
2549 int regex_err;
2550
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 }
2559
2560 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2561 if (regex_err != 0) {
2562 char buf[SIZEOF_STR] = "unknown error";
2563
2564 regerror(regex_err, view->regex, buf, sizeof(buf));
2565 report("Search failed: %s", buf);
2566 return;
2567 }
2568
2569 string_copy(view->grep, opt_search);
2570
2571 find_next(view, request);
2572 }
2573
2574 /*
2575 * Incremental updating
2576 */
2577
2578 static void
2579 reset_view(struct view *view)
2580 {
2581 int i;
2582
2583 for (i = 0; i < view->lines; i++)
2584 free(view->line[i].data);
2585 free(view->line);
2586
2587 view->p_offset = view->offset;
2588 view->p_yoffset = view->yoffset;
2589 view->p_lineno = view->lineno;
2590
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 }
2600
2601 static void
2602 free_argv(const char *argv[])
2603 {
2604 int argc;
2605
2606 for (argc = 0; argv[argc]; argc++)
2607 free((void *) argv[argc]);
2608 }
2609
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;
2616
2617 free_argv(dst_argv);
2618
2619 for (argc = 0; src_argv[argc]; argc++) {
2620 const char *arg = src_argv[argc];
2621 size_t bufpos = 0;
2622
2623 while (arg) {
2624 char *next = strstr(arg, "%(");
2625 int len = next - arg;
2626 const char *value;
2627
2628 if (!next || noreplace) {
2629 if (flags == FORMAT_DASH && !strcmp(arg, "--"))
2630 noreplace = TRUE;
2631 len = strlen(arg);
2632 value = "";
2633
2634 } else if (!prefixcmp(next, "%(directory)")) {
2635 value = opt_path;
2636
2637 } else if (!prefixcmp(next, "%(file)")) {
2638 value = opt_file;
2639
2640 } else if (!prefixcmp(next, "%(ref)")) {
2641 value = *opt_ref ? opt_ref : "HEAD";
2642
2643 } else if (!prefixcmp(next, "%(head)")) {
2644 value = ref_head;
2645
2646 } else if (!prefixcmp(next, "%(commit)")) {
2647 value = ref_commit;
2648
2649 } else if (!prefixcmp(next, "%(blob)")) {
2650 value = ref_blob;
2651
2652 } else {
2653 report("Unknown replacement: `%s`", next);
2654 return FALSE;
2655 }
2656
2657 if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2658 return FALSE;
2659
2660 arg = next && !noreplace ? strchr(next, ')') + 1 : NULL;
2661 }
2662
2663 dst_argv[argc] = strdup(buf);
2664 if (!dst_argv[argc])
2665 break;
2666 }
2667
2668 dst_argv[argc] = NULL;
2669
2670 return src_argv[argc] == NULL;
2671 }
2672
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;
2678
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 }
2685
2686 if (goto_view_line(view, view->p_offset, view->p_lineno) &&
2687 view_is_displayed(view))
2688 werase(view->win);
2689
2690 view->yoffset = view->p_yoffset;
2691 view->p_restore = FALSE;
2692
2693 return TRUE;
2694 }
2695
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 }
2710
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 }
2720
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 }
2729
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 }
2737
2738 static bool
2739 begin_update(struct view *view, bool refresh)
2740 {
2741 if (view->pipe)
2742 end_update(view, TRUE);
2743
2744 if (refresh) {
2745 if (!start_io(&view->io))
2746 return FALSE;
2747
2748 } else {
2749 if (view == VIEW(REQ_VIEW_TREE) && strcmp(view->vid, view->id))
2750 opt_path[0] = 0;
2751
2752 if (!run_io_rd(&view->io, view->ops->argv, FORMAT_ALL))
2753 return FALSE;
2754
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 }
2761
2762 setup_update(view, view->id);
2763
2764 return TRUE;
2765 }
2766
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;
2773
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 }
2778
2779 return mem;
2780 }
2781
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));
2788
2789 if (!tmp)
2790 return NULL;
2791
2792 view->line = tmp;
2793 view->line_alloc = alloc;
2794 return view->line;
2795 }
2796
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;
2806
2807 if (!view->pipe)
2808 return TRUE;
2809
2810 if (!io_can_read(view->pipe)) {
2811 if (view->lines == 0) {
2812 time_t secs = time(NULL) - view->start_time;
2813
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 }
2823
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;
2828
2829 char *outbuf = out_buffer;
2830 size_t outlen = sizeof(out_buffer);
2831
2832 size_t ret;
2833
2834 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2835 if (ret != (size_t) -1)
2836 line = out_buffer;
2837 }
2838
2839 if (!view->ops->read(view, line)) {
2840 report("Allocation failure");
2841 end_update(view, TRUE);
2842 return FALSE;
2843 }
2844 }
2845
2846 {
2847 unsigned long lines = view->lines;
2848 int digits;
2849
2850 for (digits = 0; lines; digits++)
2851 lines /= 10;
2852
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 }
2860
2861 if (io_error(view->pipe)) {
2862 report("Failed to read: %s", io_strerror(view->pipe));
2863 end_update(view, TRUE);
2864
2865 } else if (io_eof(view->pipe)) {
2866 report("");
2867 end_update(view, FALSE);
2868 }
2869
2870 if (restore_view_position(view))
2871 redraw = TRUE;
2872
2873 if (!view_is_displayed(view))
2874 return TRUE;
2875
2876 if (redraw)
2877 redraw_view_from(view, 0);
2878 else
2879 redraw_view_dirty(view);
2880
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 }
2886
2887 static struct line *
2888 add_line_data(struct view *view, void *data, enum line_type type)
2889 {
2890 struct line *line;
2891
2892 if (!realloc_lines(view, view->lines + 1))
2893 return NULL;
2894
2895 line = &view->line[view->lines++];
2896 memset(line, 0, sizeof(*line));
2897 line->type = type;
2898 line->data = data;
2899 line->dirty = 1;
2900
2901 return line;
2902 }
2903
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;
2908
2909 return data ? add_line_data(view, data, type) : NULL;
2910 }
2911
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;
2917
2918 va_start(args, fmt);
2919 if (vsnprintf(buf, sizeof(buf), fmt, args) >= sizeof(buf))
2920 buf[0] = 0;
2921 va_end(args);
2922
2923 return buf[0] ? add_line_text(view, buf, type) : NULL;
2924 }
2925
2926 /*
2927 * View opening
2928 */
2929
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 };
2937
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];
2947
2948 if (view == prev && nviews == 1 && !reload) {
2949 report("Already in %s view", view->name);
2950 return;
2951 }
2952
2953 if (view->git_dir && !opt_git_dir[0]) {
2954 report("The %s view is disabled in pager view", view->name);
2955 return;
2956 }
2957
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 }
2967
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();
2973
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);
2982
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 }
2988
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;
2992
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 }
2997
2998 if (prev && view != prev) {
2999 if (split) {
3000 /* "Blur" the previous view. */
3001 update_view_title(prev);
3002 }
3003
3004 view->parent = prev;
3005 }
3006
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 }
3018
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 }
3030
3031 static void
3032 open_mergetool(const char *file)
3033 {
3034 const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
3035
3036 open_external_viewer(mergetool_argv, opt_cdup);
3037 }
3038
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;
3044
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";
3054
3055 editor_argv[0] = editor;
3056 open_external_viewer(editor_argv, from_root ? opt_cdup : NULL);
3057 }
3058
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 };
3064
3065 if (!req) {
3066 report("Unknown run request");
3067 return;
3068 }
3069
3070 if (format_argv(argv, req->argv, FORMAT_ALL))
3071 open_external_viewer(argv, NULL);
3072 free_argv(argv);
3073 }
3074
3075 /*
3076 * User request switch noodle
3077 */
3078
3079 static int
3080 view_driver(struct view *view, enum request request)
3081 {
3082 int i;
3083
3084 if (request == REQ_NONE) {
3085 doupdate();
3086 return TRUE;
3087 }
3088
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 }
3100
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 }
3106
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;
3116
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;
3125
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;
3134
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;
3143
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;
3152
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;
3161
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;
3169
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;
3177
3178 case REQ_NEXT:
3179 case REQ_PREVIOUS:
3180 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
3181
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;
3191
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]);
3200
3201 } else {
3202 move_view(view, request);
3203 }
3204 break;
3205
3206 case REQ_VIEW_NEXT:
3207 {
3208 int nviews = displayed_views();
3209 int next_view = (current_view + 1) % nviews;
3210
3211 if (next_view == current_view) {
3212 report("Only one view is displayed");
3213 break;
3214 }
3215
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;
3225
3226 case REQ_MAXIMIZE:
3227 if (displayed_views() == 2)
3228 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
3229 break;
3230
3231 case REQ_TOGGLE_LINENO:
3232 toggle_view_option(&opt_line_number, "line numbers");
3233 break;
3234
3235 case REQ_TOGGLE_DATE:
3236 toggle_view_option(&opt_date, "date display");
3237 break;
3238
3239 case REQ_TOGGLE_AUTHOR:
3240 toggle_view_option(&opt_author, "author display");
3241 break;
3242
3243 case REQ_TOGGLE_REV_GRAPH:
3244 toggle_view_option(&opt_rev_graph, "revision graph display");
3245 break;
3246
3247 case REQ_TOGGLE_REFS:
3248 toggle_view_option(&opt_show_refs, "reference display");
3249 break;
3250
3251 case REQ_SEARCH:
3252 case REQ_SEARCH_BACK:
3253 search_view(view, request);
3254 break;
3255
3256 case REQ_FIND_NEXT:
3257 case REQ_FIND_PREV:
3258 find_next(view, request);
3259 break;
3260
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;
3269
3270 case REQ_SHOW_VERSION:
3271 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3272 return TRUE;
3273
3274 case REQ_SCREEN_REDRAW:
3275 redraw_display(TRUE);
3276 break;
3277
3278 case REQ_EDIT:
3279 report("Nothing to edit");
3280 break;
3281
3282 case REQ_ENTER:
3283 report("Nothing to enter");
3284 break;
3285
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;
3304
3305 default:
3306 report("Unknown key, press 'h' for help");
3307 return TRUE;
3308 }
3309
3310 return TRUE;
3311 }
3312
3313
3314 /*
3315 * View backend utilities
3316 */
3317
3318 static void
3319 parse_timezone(time_t *time, const char *zone)
3320 {
3321 long tz;
3322
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]);
3327
3328 if (zone[0] == '-')
3329 tz = -tz;
3330
3331 *time -= tz;
3332 }
3333
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, '>');
3342
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 }
3352
3353 string_ncopy_do(author, authorsize, ident, strlen(ident));
3354
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);
3360
3361 if (zone && strlen(zone) == STRING_SIZE(" +0700"))
3362 parse_timezone(&time, zone + 1);
3363
3364 gmtime_r(&time, tm);
3365 }
3366 }
3367
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;
3373
3374 if (!isdigit(c))
3375 return INPUT_SKIP;
3376
3377 if (*buf)
3378 parent = atoi(buf) * 10;
3379 parent += c - '0';
3380
3381 if (parent > parents)
3382 return INPUT_SKIP;
3383 return INPUT_OK;
3384 }
3385
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;
3394
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;
3400
3401 } else if (parents == 0) {
3402 report("The selected commit has no parents");
3403 return FALSE;
3404 }
3405
3406 if (parents > 1) {
3407 char prompt[SIZEOF_STR];
3408 char *result;
3409
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 }
3417
3418 string_copy_rev(rev, &buf[41 * parents]);
3419 return TRUE;
3420 }
3421
3422 /*
3423 * Pager backend
3424 */
3425
3426 static bool
3427 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3428 {
3429 char text[SIZEOF_STR];
3430
3431 if (opt_line_number && draw_lineno(view, lineno))
3432 return TRUE;
3433
3434 string_expand(text, sizeof(text), line->data, opt_tab_size);
3435 draw_text(view, line->type, text, TRUE);
3436 return TRUE;
3437 }
3438
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;
3445
3446 if (run_io_buf(describe_argv, refbuf, sizeof(refbuf)))
3447 ref = chomp_string(refbuf);
3448
3449 if (!ref || !*ref)
3450 return TRUE;
3451
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;
3455
3456 return TRUE;
3457 }
3458
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;
3468
3469 assert(line->type == LINE_COMMIT);
3470
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 }
3477
3478 do {
3479 struct ref *ref = refs[refpos];
3480 const char *fmt = ref->tag ? "%s[%s]" :
3481 ref->remote ? "%s<%s>" : "%s%s";
3482
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);
3489
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 }
3496
3497 if (bufpos == 0)
3498 return;
3499
3500 add_line_text(view, buf, LINE_PP_REFS);
3501 }
3502
3503 static bool
3504 pager_read(struct view *view, char *data)
3505 {
3506 struct line *line;
3507
3508 if (!data)
3509 return TRUE;
3510
3511 line = add_line_text(view, data, get_line_type(data));
3512 if (!line)
3513 return FALSE;
3514
3515 if (line->type == LINE_COMMIT &&
3516 (view == VIEW(REQ_VIEW_DIFF) ||
3517 view == VIEW(REQ_VIEW_LOG)))
3518 add_pager_refs(view, line);
3519
3520 return TRUE;
3521 }
3522
3523 static enum request
3524 pager_request(struct view *view, enum request request, struct line *line)
3525 {
3526 int split = 0;
3527
3528 if (request != REQ_ENTER)
3529 return request;
3530
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 }
3537
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);
3542
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);
3548
3549 return REQ_NONE;
3550 }
3551
3552 static bool
3553 pager_grep(struct view *view, struct line *line)
3554 {
3555 regmatch_t pmatch;
3556 char *text = line->data;
3557
3558 if (!*text)
3559 return FALSE;
3560
3561 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3562 return FALSE;
3563
3564 return TRUE;
3565 }
3566
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 ");
3572
3573 if (view != VIEW(REQ_VIEW_PAGER))
3574 string_copy_rev(view->ref, text);
3575 string_copy_rev(ref_commit, text);
3576 }
3577 }
3578
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 };
3589
3590 static const char *log_argv[SIZEOF_ARG] = {
3591 "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3592 };
3593
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 }
3606
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 };
3617
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 };
3622
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 };
3633
3634 /*
3635 * Help backend
3636 */
3637
3638 static bool
3639 help_open(struct view *view)
3640 {
3641 char buf[SIZEOF_STR];
3642 size_t bufpos;
3643 int i;
3644
3645 if (view->lines > 0)
3646 return TRUE;
3647
3648 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3649
3650 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3651 const char *key;
3652
3653 if (req_info[i].request == REQ_NONE)
3654 continue;
3655
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 }
3661
3662 key = get_key(req_info[i].request);
3663 if (!*key)
3664 key = "(no key defined)";
3665
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 }
3671
3672 add_line_format(view, LINE_DEFAULT, " %-25s %-20s %s",
3673 key, buf, req_info[i].help);
3674 }
3675
3676 if (run_requests) {
3677 add_line_text(view, "", LINE_DEFAULT);
3678 add_line_text(view, "External commands:", LINE_DEFAULT);
3679 }
3680
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;
3685
3686 if (!req)
3687 continue;
3688
3689 key = get_key_name(req->key);
3690 if (!*key)
3691 key = "(no key defined)";
3692
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;
3697
3698 add_line_format(view, LINE_DEFAULT, " %-10s %-14s `%s`",
3699 keymap_table[req->keymap].name, key, buf);
3700 }
3701
3702 return TRUE;
3703 }
3704
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 };
3715
3716
3717 /*
3718 * Tree backend
3719 */
3720
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 };
3726
3727 /* The top of the path stack. */
3728 static struct tree_stack_entry *tree_stack = NULL;
3729 unsigned long tree_lineno = 0;
3730
3731 static void
3732 pop_tree_stack_entry(void)
3733 {
3734 struct tree_stack_entry *entry = tree_stack;
3735
3736 tree_lineno = entry->lineno;
3737 entry->name[0] = 0;
3738 tree_stack = entry->prev;
3739 free(entry);
3740 }
3741
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);
3747
3748 if (!entry)
3749 return;
3750
3751 entry->prev = tree_stack;
3752 entry->name = opt_path + pathlen;
3753 tree_stack = entry;
3754
3755 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3756 pop_tree_stack_entry();
3757 return;
3758 }
3759
3760 /* Move the current line to the first tree entry. */
3761 tree_lineno = 1;
3762 entry->lineno = lineno;
3763 }
3764
3765 /* Parse output from git-ls-tree(1):
3766 *
3767 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3768 */
3769
3770 #define SIZEOF_TREE_ATTR \
3771 STRING_SIZE("100644 blob f931e1d229c3e185caad4449bf5b66ed72462657\t")
3772
3773 #define SIZEOF_TREE_MODE \
3774 STRING_SIZE("100644 ")
3775
3776 #define TREE_ID_OFFSET \
3777 STRING_SIZE("100644 blob ")
3778
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 };
3786
3787 static const char *
3788 tree_path(struct line *line)
3789 {
3790 return ((struct tree_entry *) line->data)->name;
3791 }
3792
3793
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 }
3801
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;
3808
3809 if (!entry || !line) {
3810 free(entry);
3811 return NULL;
3812 }
3813
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);
3819
3820 return line;
3821 }
3822
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;
3828
3829 if (!text && *read_date) {
3830 *read_date = FALSE;
3831 return TRUE;
3832
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 = {};
3841
3842 if (!view->lines) {
3843 tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL);
3844 report("Tree is empty");
3845 return TRUE;
3846 }
3847
3848 if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
3849 report("Failed to load tree data");
3850 return TRUE;
3851 }
3852
3853 done_io(view->pipe);
3854 view->io = io;
3855 *read_date = TRUE;
3856 return FALSE;
3857
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);
3861
3862 } else if (*text == ':') {
3863 char *pos;
3864 size_t annotated = 1;
3865 size_t i;
3866
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;
3878
3879 for (i = 1; i < view->lines; i++) {
3880 struct line *line = &view->line[i];
3881 struct tree_entry *entry = line->data;
3882
3883 annotated += !!*entry->author;
3884 if (*entry->author || strcmp(entry->name, text))
3885 continue;
3886
3887 string_copy(entry->author, author_name);
3888 memcpy(&entry->time, &author_time, sizeof(entry->time));
3889 line->dirty = 1;
3890 break;
3891 }
3892
3893 if (annotated == view->lines)
3894 kill_io(view->pipe);
3895 }
3896 return TRUE;
3897 }
3898
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;
3908
3909 if (read_date || !text)
3910 return tree_read_date(view, text, &read_date);
3911
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;
3917
3918 /* Strip the path part ... */
3919 if (*opt_path) {
3920 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3921 size_t striplen = strlen(opt_path);
3922
3923 if (pathlen > striplen)
3924 memmove(path, path + striplen,
3925 pathlen - striplen + 1);
3926
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 }
3932
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;
3938
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;
3943
3944 memmove(line + 1, line, (entry - line) * sizeof(*entry));
3945
3946 line->data = data;
3947 line->type = type;
3948 for (; line <= entry; line++)
3949 line->dirty = line->cleareol = 1;
3950 return TRUE;
3951 }
3952
3953 if (tree_lineno > view->lineno) {
3954 view->lineno = tree_lineno;
3955 tree_lineno = 0;
3956 }
3957
3958 return TRUE;
3959 }
3960
3961 static bool
3962 tree_draw(struct view *view, struct line *line, unsigned int lineno)
3963 {
3964 struct tree_entry *entry = line->data;
3965
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;
3972
3973 if (opt_author && draw_author(view, entry->author))
3974 return TRUE;
3975
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 }
3983
3984 static void
3985 open_blob_editor()
3986 {
3987 char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
3988 int fd = mkstemp(file);
3989
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 }
3999
4000 static enum request
4001 tree_request(struct view *view, enum request request, struct line *line)
4002 {
4003 enum open_flags flags;
4004
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 }
4011
4012 string_copy(opt_ref, view->vid);
4013 return request;
4014
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;
4024
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;
4033
4034 case REQ_ENTER:
4035 break;
4036
4037 default:
4038 return request;
4039 }
4040
4041 /* Cleanup the stack if the tree view is at a different tree. */
4042 while (!*opt_path && tree_stack)
4043 pop_tree_stack_entry();
4044
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();
4051
4052 } else {
4053 const char *basename = tree_path(line);
4054
4055 push_tree_stack_entry(basename, view->lineno);
4056 }
4057
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;
4063
4064 case LINE_TREE_FILE:
4065 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4066 request = REQ_VIEW_BLOB;
4067 break;
4068
4069 default:
4070 return REQ_NONE;
4071 }
4072
4073 open_view(view, request, flags);
4074 if (request == REQ_VIEW_TREE)
4075 view->lineno = tree_lineno;
4076
4077 return REQ_NONE;
4078 }
4079
4080 static void
4081 tree_select(struct view *view, struct line *line)
4082 {
4083 struct tree_entry *entry = line->data;
4084
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));
4088
4089 } else if (line->type != LINE_TREE_DIR) {
4090 return;
4091 }
4092
4093 string_copy_rev(view->ref, entry->id);
4094 }
4095
4096 static const char *tree_argv[SIZEOF_ARG] = {
4097 "git", "ls-tree", "%(commit)", "%(directory)", NULL
4098 };
4099
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 };
4110
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 }
4118
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 }
4130
4131 static const char *blob_argv[SIZEOF_ARG] = {
4132 "git", "cat-file", "blob", "%(blob)", NULL
4133 };
4134
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 };
4145
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 */
4156
4157 static const char *blame_head_argv[] = {
4158 "git", "blame", "--incremental", "--", "%(file)", NULL
4159 };
4160
4161 static const char *blame_ref_argv[] = {
4162 "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
4163 };
4164
4165 static const char *blame_cat_file_argv[] = {
4166 "git", "cat-file", "blob", "%(ref):%(file)", NULL
4167 };
4168
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 };
4177
4178 struct blame {
4179 struct blame_commit *commit;
4180 unsigned long lineno;
4181 char text[1];
4182 };
4183
4184 static bool
4185 blame_open(struct view *view)
4186 {
4187 if (*opt_ref || !io_open(&view->io, opt_file)) {
4188 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
4189 return FALSE;
4190 }
4191
4192 setup_update(view, opt_file);
4193 string_format(view->ref, "%s ...", opt_file);
4194
4195 return TRUE;
4196 }
4197
4198 static struct blame_commit *
4199 get_blame_commit(struct view *view, const char *id)
4200 {
4201 size_t i;
4202
4203 for (i = 0; i < view->lines; i++) {
4204 struct blame *blame = view->line[i].data;
4205
4206 if (!blame->commit)
4207 continue;
4208
4209 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4210 return blame->commit;
4211 }
4212
4213 {
4214 struct blame_commit *commit = calloc(1, sizeof(*commit));
4215
4216 if (commit)
4217 string_ncopy(commit->id, id, SIZEOF_REV);
4218 return commit;
4219 }
4220 }
4221
4222 static bool
4223 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4224 {
4225 const char *pos = *posref;
4226
4227 *posref = NULL;
4228 pos = strchr(pos + 1, ' ');
4229 if (!pos || !isdigit(pos[1]))
4230 return FALSE;
4231 *number = atoi(pos + 1);
4232 if (*number < min || *number > max)
4233 return FALSE;
4234
4235 *posref = pos;
4236 return TRUE;
4237 }
4238
4239 static struct blame_commit *
4240 parse_blame_commit(struct view *view, const char *text, int *blamed)
4241 {
4242 struct blame_commit *commit;
4243 struct blame *blame;
4244 const char *pos = text + SIZEOF_REV - 2;
4245 size_t orig_lineno = 0;
4246 size_t lineno;
4247 size_t group;
4248
4249 if (strlen(text) <= SIZEOF_REV || pos[1] != ' ')
4250 return NULL;
4251
4252 if (!parse_number(&pos, &orig_lineno, 1, 9999999) ||
4253 !parse_number(&pos, &lineno, 1, view->lines) ||
4254 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4255 return NULL;
4256
4257 commit = get_blame_commit(view, text);
4258 if (!commit)
4259 return NULL;
4260
4261 *blamed += group;
4262 while (group--) {
4263 struct line *line = &view->line[lineno + group - 1];
4264
4265 blame = line->data;
4266 blame->commit = commit;
4267 blame->lineno = orig_lineno + group - 1;
4268 line->dirty = 1;
4269 }
4270
4271 return commit;
4272 }
4273
4274 static bool
4275 blame_read_file(struct view *view, const char *line, bool *read_file)
4276 {
4277 if (!line) {
4278 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
4279 struct io io = {};
4280
4281 if (view->lines == 0 && !view->parent)
4282 die("No blame exist for %s", view->vid);
4283
4284 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
4285 report("Failed to load blame data");
4286 return TRUE;
4287 }
4288
4289 done_io(view->pipe);
4290 view->io = io;
4291 *read_file = FALSE;
4292 return FALSE;
4293
4294 } else {
4295 size_t linelen = strlen(line);
4296 struct blame *blame = malloc(sizeof(*blame) + linelen);
4297
4298 if (!blame)
4299 return FALSE;
4300
4301 blame->commit = NULL;
4302 strncpy(blame->text, line, linelen);
4303 blame->text[linelen] = 0;
4304 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4305 }
4306 }
4307
4308 static bool
4309 match_blame_header(const char *name, char **line)
4310 {
4311 size_t namelen = strlen(name);
4312 bool matched = !strncmp(name, *line, namelen);
4313
4314 if (matched)
4315 *line += namelen;
4316
4317 return matched;
4318 }
4319
4320 static bool
4321 blame_read(struct view *view, char *line)
4322 {
4323 static struct blame_commit *commit = NULL;
4324 static int blamed = 0;
4325 static time_t author_time;
4326 static bool read_file = TRUE;
4327
4328 if (read_file)
4329 return blame_read_file(view, line, &read_file);
4330
4331 if (!line) {
4332 /* Reset all! */
4333 commit = NULL;
4334 blamed = 0;
4335 read_file = TRUE;
4336 string_format(view->ref, "%s", view->vid);
4337 if (view_is_displayed(view)) {
4338 update_view_title(view);
4339 redraw_view_from(view, 0);
4340 }
4341 return TRUE;
4342 }
4343
4344 if (!commit) {
4345 commit = parse_blame_commit(view, line, &blamed);
4346 string_format(view->ref, "%s %2d%%", view->vid,
4347 view->lines ? blamed * 100 / view->lines : 0);
4348
4349 } else if (match_blame_header("author ", &line)) {
4350 string_ncopy(commit->author, line, strlen(line));
4351
4352 } else if (match_blame_header("author-time ", &line)) {
4353 author_time = (time_t) atol(line);
4354
4355 } else if (match_blame_header("author-tz ", &line)) {
4356 parse_timezone(&author_time, line);
4357 gmtime_r(&author_time, &commit->time);
4358
4359 } else if (match_blame_header("summary ", &line)) {
4360 string_ncopy(commit->title, line, strlen(line));
4361
4362 } else if (match_blame_header("previous ", &line)) {
4363 commit->has_previous = TRUE;
4364
4365 } else if (match_blame_header("filename ", &line)) {
4366 string_ncopy(commit->filename, line, strlen(line));
4367 commit = NULL;
4368 }
4369
4370 return TRUE;
4371 }
4372
4373 static bool
4374 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4375 {
4376 struct blame *blame = line->data;
4377 struct tm *time = NULL;
4378 const char *id = NULL, *author = NULL;
4379 char text[SIZEOF_STR];
4380
4381 if (blame->commit && *blame->commit->filename) {
4382 id = blame->commit->id;
4383 author = blame->commit->author;
4384 time = &blame->commit->time;
4385 }
4386
4387 if (opt_date && draw_date(view, time))
4388 return TRUE;
4389
4390 if (opt_author && draw_author(view, author))
4391 return TRUE;
4392
4393 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4394 return TRUE;
4395
4396 if (draw_lineno(view, lineno))
4397 return TRUE;
4398
4399 string_expand(text, sizeof(text), blame->text, opt_tab_size);
4400 draw_text(view, LINE_DEFAULT, text, TRUE);
4401 return TRUE;
4402 }
4403
4404 static bool
4405 check_blame_commit(struct blame *blame)
4406 {
4407 if (!blame->commit)
4408 report("Commit data not loaded yet");
4409 else if (!strcmp(blame->commit->id, NULL_ID))
4410 report("No commit exist for the selected line");
4411 else
4412 return TRUE;
4413 return FALSE;
4414 }
4415
4416 static enum request
4417 blame_request(struct view *view, enum request request, struct line *line)
4418 {
4419 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4420 struct blame *blame = line->data;
4421
4422 switch (request) {
4423 case REQ_VIEW_BLAME:
4424 if (check_blame_commit(blame)) {
4425 string_copy(opt_ref, blame->commit->id);
4426 string_copy(opt_file, blame->commit->filename);
4427 if (blame->lineno)
4428 view->lineno = blame->lineno;
4429 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4430 }
4431 break;
4432
4433 case REQ_PARENT:
4434 if (check_blame_commit(blame) &&
4435 select_commit_parent(blame->commit->id, opt_ref))
4436 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4437 break;
4438
4439 case REQ_ENTER:
4440 if (!blame->commit) {
4441 report("No commit loaded yet");
4442 break;
4443 }
4444
4445 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4446 !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4447 break;
4448
4449 if (!strcmp(blame->commit->id, NULL_ID)) {
4450 struct view *diff = VIEW(REQ_VIEW_DIFF);
4451 const char *diff_index_argv[] = {
4452 "git", "diff-index", "--root", "--patch-with-stat",
4453 "-C", "-M", "HEAD", "--", view->vid, NULL
4454 };
4455
4456 if (!blame->commit->has_previous) {
4457 diff_index_argv[1] = "diff";
4458 diff_index_argv[2] = "--no-color";
4459 diff_index_argv[6] = "--";
4460 diff_index_argv[7] = "/dev/null";
4461 }
4462
4463 if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4464 report("Failed to allocate diff command");
4465 break;
4466 }
4467 flags |= OPEN_PREPARED;
4468 }
4469
4470 open_view(view, REQ_VIEW_DIFF, flags);
4471 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4472 string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4473 break;
4474
4475 default:
4476 return request;
4477 }
4478
4479 return REQ_NONE;
4480 }
4481
4482 static bool
4483 blame_grep(struct view *view, struct line *line)
4484 {
4485 struct blame *blame = line->data;
4486 struct blame_commit *commit = blame->commit;
4487 regmatch_t pmatch;
4488
4489 #define MATCH(text, on) \
4490 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4491
4492 if (commit) {
4493 char buf[DATE_COLS + 1];
4494
4495 if (MATCH(commit->title, 1) ||
4496 MATCH(commit->author, opt_author) ||
4497 MATCH(commit->id, opt_date))
4498 return TRUE;
4499
4500 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
4501 MATCH(buf, 1))
4502 return TRUE;
4503 }
4504
4505 return MATCH(blame->text, 1);
4506
4507 #undef MATCH
4508 }
4509
4510 static void
4511 blame_select(struct view *view, struct line *line)
4512 {
4513 struct blame *blame = line->data;
4514 struct blame_commit *commit = blame->commit;
4515
4516 if (!commit)
4517 return;
4518
4519 if (!strcmp(commit->id, NULL_ID))
4520 string_ncopy(ref_commit, "HEAD", 4);
4521 else
4522 string_copy_rev(ref_commit, commit->id);
4523 }
4524
4525 static struct view_ops blame_ops = {
4526 "line",
4527 NULL,
4528 blame_open,
4529 blame_read,
4530 blame_draw,
4531 blame_request,
4532 blame_grep,
4533 blame_select,
4534 };
4535
4536 /*
4537 * Status backend
4538 */
4539
4540 struct status {
4541 char status;
4542 struct {
4543 mode_t mode;
4544 char rev[SIZEOF_REV];
4545 char name[SIZEOF_STR];
4546 } old;
4547 struct {
4548 mode_t mode;
4549 char rev[SIZEOF_REV];
4550 char name[SIZEOF_STR];
4551 } new;
4552 };
4553
4554 static char status_onbranch[SIZEOF_STR];
4555 static struct status stage_status;
4556 static enum line_type stage_line_type;
4557 static size_t stage_chunks;
4558 static int *stage_chunk;
4559
4560 /* This should work even for the "On branch" line. */
4561 static inline bool
4562 status_has_none(struct view *view, struct line *line)
4563 {
4564 return line < view->line + view->lines && !line[1].data;
4565 }
4566
4567 /* Get fields from the diff line:
4568 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4569 */
4570 static inline bool
4571 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4572 {
4573 const char *old_mode = buf + 1;
4574 const char *new_mode = buf + 8;
4575 const char *old_rev = buf + 15;
4576 const char *new_rev = buf + 56;
4577 const char *status = buf + 97;
4578
4579 if (bufsize < 98 ||
4580 old_mode[-1] != ':' ||
4581 new_mode[-1] != ' ' ||
4582 old_rev[-1] != ' ' ||
4583 new_rev[-1] != ' ' ||
4584 status[-1] != ' ')
4585 return FALSE;
4586
4587 file->status = *status;
4588
4589 string_copy_rev(file->old.rev, old_rev);
4590 string_copy_rev(file->new.rev, new_rev);
4591
4592 file->old.mode = strtoul(old_mode, NULL, 8);
4593 file->new.mode = strtoul(new_mode, NULL, 8);
4594
4595 file->old.name[0] = file->new.name[0] = 0;
4596
4597 return TRUE;
4598 }
4599
4600 static bool
4601 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4602 {
4603 struct status *unmerged = NULL;
4604 char *buf;
4605 struct io io = {};
4606
4607 if (!run_io(&io, argv, NULL, IO_RD))
4608 return FALSE;
4609
4610 add_line_data(view, NULL, type);
4611
4612 while ((buf = io_get(&io, 0, TRUE))) {
4613 struct status *file = unmerged;
4614
4615 if (!file) {
4616 file = calloc(1, sizeof(*file));
4617 if (!file || !add_line_data(view, file, type))
4618 goto error_out;
4619 }
4620
4621 /* Parse diff info part. */
4622 if (status) {
4623 file->status = status;
4624 if (status == 'A')
4625 string_copy(file->old.rev, NULL_ID);
4626
4627 } else if (!file->status || file == unmerged) {
4628 if (!status_get_diff(file, buf, strlen(buf)))
4629 goto error_out;
4630
4631 buf = io_get(&io, 0, TRUE);
4632 if (!buf)
4633 break;
4634
4635 /* Collapse all modified entries that follow an
4636 * associated unmerged entry. */
4637 if (unmerged == file) {
4638 unmerged->status = 'U';
4639 unmerged = NULL;
4640 } else if (file->status == 'U') {
4641 unmerged = file;
4642 }
4643 }
4644
4645 /* Grab the old name for rename/copy. */
4646 if (!*file->old.name &&
4647 (file->status == 'R' || file->status == 'C')) {
4648 string_ncopy(file->old.name, buf, strlen(buf));
4649
4650 buf = io_get(&io, 0, TRUE);
4651 if (!buf)
4652 break;
4653 }
4654
4655 /* git-ls-files just delivers a NUL separated list of
4656 * file names similar to the second half of the
4657 * git-diff-* output. */
4658 string_ncopy(file->new.name, buf, strlen(buf));
4659 if (!*file->old.name)
4660 string_copy(file->old.name, file->new.name);
4661 file = NULL;
4662 }
4663
4664 if (io_error(&io)) {
4665 error_out:
4666 done_io(&io);
4667 return FALSE;
4668 }
4669
4670 if (!view->line[view->lines - 1].data)
4671 add_line_data(view, NULL, LINE_STAT_NONE);
4672
4673 done_io(&io);
4674 return TRUE;
4675 }
4676
4677 /* Don't show unmerged entries in the staged section. */
4678 static const char *status_diff_index_argv[] = {
4679 "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4680 "--cached", "-M", "HEAD", NULL
4681 };
4682
4683 static const char *status_diff_files_argv[] = {
4684 "git", "diff-files", "-z", NULL
4685 };
4686
4687 static const char *status_list_other_argv[] = {
4688 "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
4689 };
4690
4691 static const char *status_list_no_head_argv[] = {
4692 "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4693 };
4694
4695 static const char *update_index_argv[] = {
4696 "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4697 };
4698
4699 /* Restore the previous line number to stay in the context or select a
4700 * line with something that can be updated. */
4701 static void
4702 status_restore(struct view *view)
4703 {
4704 if (view->p_lineno >= view->lines)
4705 view->p_lineno = view->lines - 1;
4706 while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
4707 view->p_lineno++;
4708 while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
4709 view->p_lineno--;
4710
4711 /* If the above fails, always skip the "On branch" line. */
4712 if (view->p_lineno < view->lines)
4713 view->lineno = view->p_lineno;
4714 else
4715 view->lineno = 1;
4716
4717 if (view->lineno < view->offset)
4718 view->offset = view->lineno;
4719 else if (view->offset + view->height <= view->lineno)
4720 view->offset = view->lineno - view->height + 1;
4721
4722 view->p_restore = FALSE;
4723 }
4724
4725 static void
4726 status_update_onbranch(void)
4727 {
4728 static const char *paths[][2] = {
4729 { "rebase-apply/rebasing", "Rebasing" },
4730 { "rebase-apply/applying", "Applying mailbox" },
4731 { "rebase-apply/", "Rebasing mailbox" },
4732 { "rebase-merge/interactive", "Interactive rebase" },
4733 { "rebase-merge/", "Rebase merge" },
4734 { "MERGE_HEAD", "Merging" },
4735 { "BISECT_LOG", "Bisecting" },
4736 { "HEAD", "On branch" },
4737 };
4738 char buf[SIZEOF_STR];
4739 struct stat stat;
4740 int i;
4741
4742 if (is_initial_commit()) {
4743 string_copy(status_onbranch, "Initial commit");
4744 return;
4745 }
4746
4747 for (i = 0; i < ARRAY_SIZE(paths); i++) {
4748 char *head = opt_head;
4749
4750 if (!string_format(buf, "%s/%s", opt_git_dir, paths[i][0]) ||
4751 lstat(buf, &stat) < 0)
4752 continue;
4753
4754 if (!*opt_head) {
4755 struct io io = {};
4756
4757 if (string_format(buf, "%s/rebase-merge/head-name", opt_git_dir) &&
4758 io_open(&io, buf) &&
4759 io_read_buf(&io, buf, sizeof(buf))) {
4760 head = chomp_string(buf);
4761 if (!prefixcmp(head, "refs/heads/"))
4762 head += STRING_SIZE("refs/heads/");
4763 }
4764 }
4765
4766 if (!string_format(status_onbranch, "%s %s", paths[i][1], head))
4767 string_copy(status_onbranch, opt_head);
4768 return;
4769 }
4770
4771 string_copy(status_onbranch, "Not currently on any branch");
4772 }
4773
4774 /* First parse staged info using git-diff-index(1), then parse unstaged
4775 * info using git-diff-files(1), and finally untracked files using
4776 * git-ls-files(1). */
4777 static bool
4778 status_open(struct view *view)
4779 {
4780 reset_view(view);
4781
4782 add_line_data(view, NULL, LINE_STAT_HEAD);
4783 status_update_onbranch();
4784
4785 run_io_bg(update_index_argv);
4786
4787 if (is_initial_commit()) {
4788 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4789 return FALSE;
4790 } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4791 return FALSE;
4792 }
4793
4794 if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4795 !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4796 return FALSE;
4797
4798 /* Restore the exact position or use the specialized restore
4799 * mode? */
4800 if (!view->p_restore)
4801 status_restore(view);
4802 return TRUE;
4803 }
4804
4805 static bool
4806 status_draw(struct view *view, struct line *line, unsigned int lineno)
4807 {
4808 struct status *status = line->data;
4809 enum line_type type;
4810 const char *text;
4811
4812 if (!status) {
4813 switch (line->type) {
4814 case LINE_STAT_STAGED:
4815 type = LINE_STAT_SECTION;
4816 text = "Changes to be committed:";
4817 break;
4818
4819 case LINE_STAT_UNSTAGED:
4820 type = LINE_STAT_SECTION;
4821 text = "Changed but not updated:";
4822 break;
4823
4824 case LINE_STAT_UNTRACKED:
4825 type = LINE_STAT_SECTION;
4826 text = "Untracked files:";
4827 break;
4828
4829 case LINE_STAT_NONE:
4830 type = LINE_DEFAULT;
4831 text = " (no files)";
4832 break;
4833
4834 case LINE_STAT_HEAD:
4835 type = LINE_STAT_HEAD;
4836 text = status_onbranch;
4837 break;
4838
4839 default:
4840 return FALSE;
4841 }
4842 } else {
4843 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4844
4845 buf[0] = status->status;
4846 if (draw_text(view, line->type, buf, TRUE))
4847 return TRUE;
4848 type = LINE_DEFAULT;
4849 text = status->new.name;
4850 }
4851
4852 draw_text(view, type, text, TRUE);
4853 return TRUE;
4854 }
4855
4856 static enum request
4857 status_enter(struct view *view, struct line *line)
4858 {
4859 struct status *status = line->data;
4860 const char *oldpath = status ? status->old.name : NULL;
4861 /* Diffs for unmerged entries are empty when passing the new
4862 * path, so leave it empty. */
4863 const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
4864 const char *info;
4865 enum open_flags split;
4866 struct view *stage = VIEW(REQ_VIEW_STAGE);
4867
4868 if (line->type == LINE_STAT_NONE ||
4869 (!status && line[1].type == LINE_STAT_NONE)) {
4870 report("No file to diff");
4871 return REQ_NONE;
4872 }
4873
4874 switch (line->type) {
4875 case LINE_STAT_STAGED:
4876 if (is_initial_commit()) {
4877 const char *no_head_diff_argv[] = {
4878 "git", "diff", "--no-color", "--patch-with-stat",
4879 "--", "/dev/null", newpath, NULL
4880 };
4881
4882 if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
4883 return REQ_QUIT;
4884 } else {
4885 const char *index_show_argv[] = {
4886 "git", "diff-index", "--root", "--patch-with-stat",
4887 "-C", "-M", "--cached", "HEAD", "--",
4888 oldpath, newpath, NULL
4889 };
4890
4891 if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
4892 return REQ_QUIT;
4893 }
4894
4895 if (status)
4896 info = "Staged changes to %s";
4897 else
4898 info = "Staged changes";
4899 break;
4900
4901 case LINE_STAT_UNSTAGED:
4902 {
4903 const char *files_show_argv[] = {
4904 "git", "diff-files", "--root", "--patch-with-stat",
4905 "-C", "-M", "--", oldpath, newpath, NULL
4906 };
4907
4908 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
4909 return REQ_QUIT;
4910 if (status)
4911 info = "Unstaged changes to %s";
4912 else
4913 info = "Unstaged changes";
4914 break;
4915 }
4916 case LINE_STAT_UNTRACKED:
4917 if (!newpath) {
4918 report("No file to show");
4919 return REQ_NONE;
4920 }
4921
4922 if (!suffixcmp(status->new.name, -1, "/")) {
4923 report("Cannot display a directory");
4924 return REQ_NONE;
4925 }
4926
4927 if (!prepare_update_file(stage, newpath))
4928 return REQ_QUIT;
4929 info = "Untracked file %s";
4930 break;
4931
4932 case LINE_STAT_HEAD:
4933 return REQ_NONE;
4934
4935 default:
4936 die("line type %d not handled in switch", line->type);
4937 }
4938
4939 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4940 open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
4941 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4942 if (status) {
4943 stage_status = *status;
4944 } else {
4945 memset(&stage_status, 0, sizeof(stage_status));
4946 }
4947
4948 stage_line_type = line->type;
4949 stage_chunks = 0;
4950 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4951 }
4952
4953 return REQ_NONE;
4954 }
4955
4956 static bool
4957 status_exists(struct status *status, enum line_type type)
4958 {
4959 struct view *view = VIEW(REQ_VIEW_STATUS);
4960 unsigned long lineno;
4961
4962 for (lineno = 0; lineno < view->lines; lineno++) {
4963 struct line *line = &view->line[lineno];
4964 struct status *pos = line->data;
4965
4966 if (line->type != type)
4967 continue;
4968 if (!pos && (!status || !status->status) && line[1].data) {
4969 select_view_line(view, lineno);
4970 return TRUE;
4971 }
4972 if (pos && !strcmp(status->new.name, pos->new.name)) {
4973 select_view_line(view, lineno);
4974 return TRUE;
4975 }
4976 }
4977
4978 return FALSE;
4979 }
4980
4981
4982 static bool
4983 status_update_prepare(struct io *io, enum line_type type)
4984 {
4985 const char *staged_argv[] = {
4986 "git", "update-index", "-z", "--index-info", NULL
4987 };
4988 const char *others_argv[] = {
4989 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
4990 };
4991
4992 switch (type) {
4993 case LINE_STAT_STAGED:
4994 return run_io(io, staged_argv, opt_cdup, IO_WR);
4995
4996 case LINE_STAT_UNSTAGED:
4997 return run_io(io, others_argv, opt_cdup, IO_WR);
4998
4999 case LINE_STAT_UNTRACKED:
5000 return run_io(io, others_argv, NULL, IO_WR);
5001
5002 default:
5003 die("line type %d not handled in switch", type);
5004 return FALSE;
5005 }
5006 }
5007
5008 static bool
5009 status_update_write(struct io *io, struct status *status, enum line_type type)
5010 {
5011 char buf[SIZEOF_STR];
5012 size_t bufsize = 0;
5013
5014 switch (type) {
5015 case LINE_STAT_STAGED:
5016 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
5017 status->old.mode,
5018 status->old.rev,
5019 status->old.name, 0))
5020 return FALSE;
5021 break;
5022
5023 case LINE_STAT_UNSTAGED:
5024 case LINE_STAT_UNTRACKED:
5025 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
5026 return FALSE;
5027 break;
5028
5029 default:
5030 die("line type %d not handled in switch", type);
5031 }
5032
5033 return io_write(io, buf, bufsize);
5034 }
5035
5036 static bool
5037 status_update_file(struct status *status, enum line_type type)
5038 {
5039 struct io io = {};
5040 bool result;
5041
5042 if (!status_update_prepare(&io, type))
5043 return FALSE;
5044
5045 result = status_update_write(&io, status, type);
5046 done_io(&io);
5047 return result;
5048 }
5049
5050 static bool
5051 status_update_files(struct view *view, struct line *line)
5052 {
5053 struct io io = {};
5054 bool result = TRUE;
5055 struct line *pos = view->line + view->lines;
5056 int files = 0;
5057 int file, done;
5058
5059 if (!status_update_prepare(&io, line->type))
5060 return FALSE;
5061
5062 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
5063 files++;
5064
5065 for (file = 0, done = 0; result && file < files; line++, file++) {
5066 int almost_done = file * 100 / files;
5067
5068 if (almost_done > done) {
5069 done = almost_done;
5070 string_format(view->ref, "updating file %u of %u (%d%% done)",
5071 file, files, done);
5072 update_view_title(view);
5073 }
5074 result = status_update_write(&io, line->data, line->type);
5075 }
5076
5077 done_io(&io);
5078 return result;
5079 }
5080
5081 static bool
5082 status_update(struct view *view)
5083 {
5084 struct line *line = &view->line[view->lineno];
5085
5086 assert(view->lines);
5087
5088 if (!line->data) {
5089 /* This should work even for the "On branch" line. */
5090 if (line < view->line + view->lines && !line[1].data) {
5091 report("Nothing to update");
5092 return FALSE;
5093 }
5094
5095 if (!status_update_files(view, line + 1)) {
5096 report("Failed to update file status");
5097 return FALSE;
5098 }
5099
5100 } else if (!status_update_file(line->data, line->type)) {
5101 report("Failed to update file status");
5102 return FALSE;
5103 }
5104
5105 return TRUE;
5106 }
5107
5108 static bool
5109 status_revert(struct status *status, enum line_type type, bool has_none)
5110 {
5111 if (!status || type != LINE_STAT_UNSTAGED) {
5112 if (type == LINE_STAT_STAGED) {
5113 report("Cannot revert changes to staged files");
5114 } else if (type == LINE_STAT_UNTRACKED) {
5115 report("Cannot revert changes to untracked files");
5116 } else if (has_none) {
5117 report("Nothing to revert");
5118 } else {
5119 report("Cannot revert changes to multiple files");
5120 }
5121 return FALSE;
5122
5123 } else {
5124 char mode[10] = "100644";
5125 const char *reset_argv[] = {
5126 "git", "update-index", "--cacheinfo", mode,
5127 status->old.rev, status->old.name, NULL
5128 };
5129 const char *checkout_argv[] = {
5130 "git", "checkout", "--", status->old.name, NULL
5131 };
5132
5133 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
5134 return FALSE;
5135 string_format(mode, "%o", status->old.mode);
5136 return (status->status != 'U' || run_io_fg(reset_argv, opt_cdup)) &&
5137 run_io_fg(checkout_argv, opt_cdup);
5138 }
5139 }
5140
5141 static enum request
5142 status_request(struct view *view, enum request request, struct line *line)
5143 {
5144 struct status *status = line->data;
5145
5146 switch (request) {
5147 case REQ_STATUS_UPDATE:
5148 if (!status_update(view))
5149 return REQ_NONE;
5150 break;
5151
5152 case REQ_STATUS_REVERT:
5153 if (!status_revert(status, line->type, status_has_none(view, line)))
5154 return REQ_NONE;
5155 break;
5156
5157 case REQ_STATUS_MERGE:
5158 if (!status || status->status != 'U') {
5159 report("Merging only possible for files with unmerged status ('U').");
5160 return REQ_NONE;
5161 }
5162 open_mergetool(status->new.name);
5163 break;
5164
5165 case REQ_EDIT:
5166 if (!status)
5167 return request;
5168 if (status->status == 'D') {
5169 report("File has been deleted.");
5170 return REQ_NONE;
5171 }
5172
5173 open_editor(status->status != '?', status->new.name);
5174 break;
5175
5176 case REQ_VIEW_BLAME:
5177 if (status) {
5178 string_copy(opt_file, status->new.name);
5179 opt_ref[0] = 0;
5180 }
5181 return request;
5182
5183 case REQ_ENTER:
5184 /* After returning the status view has been split to
5185 * show the stage view. No further reloading is
5186 * necessary. */
5187 status_enter(view, line);
5188 return REQ_NONE;
5189
5190 case REQ_REFRESH:
5191 /* Simply reload the view. */
5192 break;
5193
5194 default:
5195 return request;
5196 }
5197
5198 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5199
5200 return REQ_NONE;
5201 }
5202
5203 static void
5204 status_select(struct view *view, struct line *line)
5205 {
5206 struct status *status = line->data;
5207 char file[SIZEOF_STR] = "all files";
5208 const char *text;
5209 const char *key;
5210
5211 if (status && !string_format(file, "'%s'", status->new.name))
5212 return;
5213
5214 if (!status && line[1].type == LINE_STAT_NONE)
5215 line++;
5216
5217 switch (line->type) {
5218 case LINE_STAT_STAGED:
5219 text = "Press %s to unstage %s for commit";
5220 break;
5221
5222 case LINE_STAT_UNSTAGED:
5223 text = "Press %s to stage %s for commit";
5224 break;
5225
5226 case LINE_STAT_UNTRACKED:
5227 text = "Press %s to stage %s for addition";
5228 break;
5229
5230 case LINE_STAT_HEAD:
5231 case LINE_STAT_NONE:
5232 text = "Nothing to update";
5233 break;
5234
5235 default:
5236 die("line type %d not handled in switch", line->type);
5237 }
5238
5239 if (status && status->status == 'U') {
5240 text = "Press %s to resolve conflict in %s";
5241 key = get_key(REQ_STATUS_MERGE);
5242
5243 } else {
5244 key = get_key(REQ_STATUS_UPDATE);
5245 }
5246
5247 string_format(view->ref, text, key, file);
5248 }
5249
5250 static bool
5251 status_grep(struct view *view, struct line *line)
5252 {
5253 struct status *status = line->data;
5254 enum { S_STATUS, S_NAME, S_END } state;
5255 char buf[2] = "?";
5256 regmatch_t pmatch;
5257
5258 if (!status)
5259 return FALSE;
5260
5261 for (state = S_STATUS; state < S_END; state++) {
5262 const char *text;
5263
5264 switch (state) {
5265 case S_NAME: text = status->new.name; break;
5266 case S_STATUS:
5267 buf[0] = status->status;
5268 text = buf;
5269 break;
5270
5271 default:
5272 return FALSE;
5273 }
5274
5275 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5276 return TRUE;
5277 }
5278
5279 return FALSE;
5280 }
5281
5282 static struct view_ops status_ops = {
5283 "file",
5284 NULL,
5285 status_open,
5286 NULL,
5287 status_draw,
5288 status_request,
5289 status_grep,
5290 status_select,
5291 };
5292
5293
5294 static bool
5295 stage_diff_write(struct io *io, struct line *line, struct line *end)
5296 {
5297 while (line < end) {
5298 if (!io_write(io, line->data, strlen(line->data)) ||
5299 !io_write(io, "\n", 1))
5300 return FALSE;
5301 line++;
5302 if (line->type == LINE_DIFF_CHUNK ||
5303 line->type == LINE_DIFF_HEADER)
5304 break;
5305 }
5306
5307 return TRUE;
5308 }
5309
5310 static struct line *
5311 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5312 {
5313 for (; view->line < line; line--)
5314 if (line->type == type)
5315 return line;
5316
5317 return NULL;
5318 }
5319
5320 static bool
5321 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5322 {
5323 const char *apply_argv[SIZEOF_ARG] = {
5324 "git", "apply", "--whitespace=nowarn", NULL
5325 };
5326 struct line *diff_hdr;
5327 struct io io = {};
5328 int argc = 3;
5329
5330 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5331 if (!diff_hdr)
5332 return FALSE;
5333
5334 if (!revert)
5335 apply_argv[argc++] = "--cached";
5336 if (revert || stage_line_type == LINE_STAT_STAGED)
5337 apply_argv[argc++] = "-R";
5338 apply_argv[argc++] = "-";
5339 apply_argv[argc++] = NULL;
5340 if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
5341 return FALSE;
5342
5343 if (!stage_diff_write(&io, diff_hdr, chunk) ||
5344 !stage_diff_write(&io, chunk, view->line + view->lines))
5345 chunk = NULL;
5346
5347 done_io(&io);
5348 run_io_bg(update_index_argv);
5349
5350 return chunk ? TRUE : FALSE;
5351 }
5352
5353 static bool
5354 stage_update(struct view *view, struct line *line)
5355 {
5356 struct line *chunk = NULL;
5357
5358 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5359 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5360
5361 if (chunk) {
5362 if (!stage_apply_chunk(view, chunk, FALSE)) {
5363 report("Failed to apply chunk");
5364 return FALSE;
5365 }
5366
5367 } else if (!stage_status.status) {
5368 view = VIEW(REQ_VIEW_STATUS);
5369
5370 for (line = view->line; line < view->line + view->lines; line++)
5371 if (line->type == stage_line_type)
5372 break;
5373
5374 if (!status_update_files(view, line + 1)) {
5375 report("Failed to update files");
5376 return FALSE;
5377 }
5378
5379 } else if (!status_update_file(&stage_status, stage_line_type)) {
5380 report("Failed to update file");
5381 return FALSE;
5382 }
5383
5384 return TRUE;
5385 }
5386
5387 static bool
5388 stage_revert(struct view *view, struct line *line)
5389 {
5390 struct line *chunk = NULL;
5391
5392 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5393 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5394
5395 if (chunk) {
5396 if (!prompt_yesno("Are you sure you want to revert changes?"))
5397 return FALSE;
5398
5399 if (!stage_apply_chunk(view, chunk, TRUE)) {
5400 report("Failed to revert chunk");
5401 return FALSE;
5402 }
5403 return TRUE;
5404
5405 } else {
5406 return status_revert(stage_status.status ? &stage_status : NULL,
5407 stage_line_type, FALSE);
5408 }
5409 }
5410
5411
5412 static void
5413 stage_next(struct view *view, struct line *line)
5414 {
5415 int i;
5416
5417 if (!stage_chunks) {
5418 static size_t alloc = 0;
5419 int *tmp;
5420
5421 for (line = view->line; line < view->line + view->lines; line++) {
5422 if (line->type != LINE_DIFF_CHUNK)
5423 continue;
5424
5425 tmp = realloc_items(stage_chunk, &alloc,
5426 stage_chunks, sizeof(*tmp));
5427 if (!tmp) {
5428 report("Allocation failure");
5429 return;
5430 }
5431
5432 stage_chunk = tmp;
5433 stage_chunk[stage_chunks++] = line - view->line;
5434 }
5435 }
5436
5437 for (i = 0; i < stage_chunks; i++) {
5438 if (stage_chunk[i] > view->lineno) {
5439 do_scroll_view(view, stage_chunk[i] - view->lineno);
5440 report("Chunk %d of %d", i + 1, stage_chunks);
5441 return;
5442 }
5443 }
5444
5445 report("No next chunk found");
5446 }
5447
5448 static enum request
5449 stage_request(struct view *view, enum request request, struct line *line)
5450 {
5451 switch (request) {
5452 case REQ_STATUS_UPDATE:
5453 if (!stage_update(view, line))
5454 return REQ_NONE;
5455 break;
5456
5457 case REQ_STATUS_REVERT:
5458 if (!stage_revert(view, line))
5459 return REQ_NONE;
5460 break;
5461
5462 case REQ_STAGE_NEXT:
5463 if (stage_line_type == LINE_STAT_UNTRACKED) {
5464 report("File is untracked; press %s to add",
5465 get_key(REQ_STATUS_UPDATE));
5466 return REQ_NONE;
5467 }
5468 stage_next(view, line);
5469 return REQ_NONE;
5470
5471 case REQ_EDIT:
5472 if (!stage_status.new.name[0])
5473 return request;
5474 if (stage_status.status == 'D') {
5475 report("File has been deleted.");
5476 return REQ_NONE;
5477 }
5478
5479 open_editor(stage_status.status != '?', stage_status.new.name);
5480 break;
5481
5482 case REQ_REFRESH:
5483 /* Reload everything ... */
5484 break;
5485
5486 case REQ_VIEW_BLAME:
5487 if (stage_status.new.name[0]) {
5488 string_copy(opt_file, stage_status.new.name);
5489 opt_ref[0] = 0;
5490 }
5491 return request;
5492
5493 case REQ_ENTER:
5494 return pager_request(view, request, line);
5495
5496 default:
5497 return request;
5498 }
5499
5500 VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5501 open_view(view, REQ_VIEW_STATUS, OPEN_REFRESH);
5502
5503 /* Check whether the staged entry still exists, and close the
5504 * stage view if it doesn't. */
5505 if (!status_exists(&stage_status, stage_line_type)) {
5506 status_restore(VIEW(REQ_VIEW_STATUS));
5507 return REQ_VIEW_CLOSE;
5508 }
5509
5510 if (stage_line_type == LINE_STAT_UNTRACKED) {
5511 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5512 report("Cannot display a directory");
5513 return REQ_NONE;
5514 }
5515
5516 if (!prepare_update_file(view, stage_status.new.name)) {
5517 report("Failed to open file: %s", strerror(errno));
5518 return REQ_NONE;
5519 }
5520 }
5521 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5522
5523 return REQ_NONE;
5524 }
5525
5526 static struct view_ops stage_ops = {
5527 "line",
5528 NULL,
5529 NULL,
5530 pager_read,
5531 pager_draw,
5532 stage_request,
5533 pager_grep,
5534 pager_select,
5535 };
5536
5537
5538 /*
5539 * Revision graph
5540 */
5541
5542 struct commit {
5543 char id[SIZEOF_REV]; /* SHA1 ID. */
5544 char title[128]; /* First line of the commit message. */
5545 char author[75]; /* Author of the commit. */
5546 struct tm time; /* Date from the author ident. */
5547 struct ref **refs; /* Repository references. */
5548 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
5549 size_t graph_size; /* The width of the graph array. */
5550 bool has_parents; /* Rewritten --parents seen. */
5551 };
5552
5553 /* Size of rev graph with no "padding" columns */
5554 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5555
5556 struct rev_graph {
5557 struct rev_graph *prev, *next, *parents;
5558 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5559 size_t size;
5560 struct commit *commit;
5561 size_t pos;
5562 unsigned int boundary:1;
5563 };
5564
5565 /* Parents of the commit being visualized. */
5566 static struct rev_graph graph_parents[4];
5567
5568 /* The current stack of revisions on the graph. */
5569 static struct rev_graph graph_stacks[4] = {
5570 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5571 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5572 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5573 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5574 };
5575
5576 static inline bool
5577 graph_parent_is_merge(struct rev_graph *graph)
5578 {
5579 return graph->parents->size > 1;
5580 }
5581
5582 static inline void
5583 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5584 {
5585 struct commit *commit = graph->commit;
5586
5587 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5588 commit->graph[commit->graph_size++] = symbol;
5589 }
5590
5591 static void
5592 clear_rev_graph(struct rev_graph *graph)
5593 {
5594 graph->boundary = 0;
5595 graph->size = graph->pos = 0;
5596 graph->commit = NULL;
5597 memset(graph->parents, 0, sizeof(*graph->parents));
5598 }
5599
5600 static void
5601 done_rev_graph(struct rev_graph *graph)
5602 {
5603 if (graph_parent_is_merge(graph) &&
5604 graph->pos < graph->size - 1 &&
5605 graph->next->size == graph->size + graph->parents->size - 1) {
5606 size_t i = graph->pos + graph->parents->size - 1;
5607
5608 graph->commit->graph_size = i * 2;
5609 while (i < graph->next->size - 1) {
5610 append_to_rev_graph(graph, ' ');
5611 append_to_rev_graph(graph, '\\');
5612 i++;
5613 }
5614 }
5615
5616 clear_rev_graph(graph);
5617 }
5618
5619 static void
5620 push_rev_graph(struct rev_graph *graph, const char *parent)
5621 {
5622 int i;
5623
5624 /* "Collapse" duplicate parents lines.
5625 *
5626 * FIXME: This needs to also update update the drawn graph but
5627 * for now it just serves as a method for pruning graph lines. */
5628 for (i = 0; i < graph->size; i++)
5629 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5630 return;
5631
5632 if (graph->size < SIZEOF_REVITEMS) {
5633 string_copy_rev(graph->rev[graph->size++], parent);
5634 }
5635 }
5636
5637 static chtype
5638 get_rev_graph_symbol(struct rev_graph *graph)
5639 {
5640 chtype symbol;
5641
5642 if (graph->boundary)
5643 symbol = REVGRAPH_BOUND;
5644 else if (graph->parents->size == 0)
5645 symbol = REVGRAPH_INIT;
5646 else if (graph_parent_is_merge(graph))
5647 symbol = REVGRAPH_MERGE;
5648 else if (graph->pos >= graph->size)
5649 symbol = REVGRAPH_BRANCH;
5650 else
5651 symbol = REVGRAPH_COMMIT;
5652
5653 return symbol;
5654 }
5655
5656 static void
5657 draw_rev_graph(struct rev_graph *graph)
5658 {
5659 struct rev_filler {
5660 chtype separator, line;
5661 };
5662 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
5663 static struct rev_filler fillers[] = {
5664 { ' ', '|' },
5665 { '`', '.' },
5666 { '\'', ' ' },
5667 { '/', ' ' },
5668 };
5669 chtype symbol = get_rev_graph_symbol(graph);
5670 struct rev_filler *filler;
5671 size_t i;
5672
5673 if (opt_line_graphics)
5674 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
5675
5676 filler = &fillers[DEFAULT];
5677
5678 for (i = 0; i < graph->pos; i++) {
5679 append_to_rev_graph(graph, filler->line);
5680 if (graph_parent_is_merge(graph->prev) &&
5681 graph->prev->pos == i)
5682 filler = &fillers[RSHARP];
5683
5684 append_to_rev_graph(graph, filler->separator);
5685 }
5686
5687 /* Place the symbol for this revision. */
5688 append_to_rev_graph(graph, symbol);
5689
5690 if (graph->prev->size > graph->size)
5691 filler = &fillers[RDIAG];
5692 else
5693 filler = &fillers[DEFAULT];
5694
5695 i++;
5696
5697 for (; i < graph->size; i++) {
5698 append_to_rev_graph(graph, filler->separator);
5699 append_to_rev_graph(graph, filler->line);
5700 if (graph_parent_is_merge(graph->prev) &&
5701 i < graph->prev->pos + graph->parents->size)
5702 filler = &fillers[RSHARP];
5703 if (graph->prev->size > graph->size)
5704 filler = &fillers[LDIAG];
5705 }
5706
5707 if (graph->prev->size > graph->size) {
5708 append_to_rev_graph(graph, filler->separator);
5709 if (filler->line != ' ')
5710 append_to_rev_graph(graph, filler->line);
5711 }
5712 }
5713
5714 /* Prepare the next rev graph */
5715 static void
5716 prepare_rev_graph(struct rev_graph *graph)
5717 {
5718 size_t i;
5719
5720 /* First, traverse all lines of revisions up to the active one. */
5721 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5722 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5723 break;
5724
5725 push_rev_graph(graph->next, graph->rev[graph->pos]);
5726 }
5727
5728 /* Interleave the new revision parent(s). */
5729 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5730 push_rev_graph(graph->next, graph->parents->rev[i]);
5731
5732 /* Lastly, put any remaining revisions. */
5733 for (i = graph->pos + 1; i < graph->size; i++)
5734 push_rev_graph(graph->next, graph->rev[i]);
5735 }
5736
5737 static void
5738 update_rev_graph(struct view *view, struct rev_graph *graph)
5739 {
5740 /* If this is the finalizing update ... */
5741 if (graph->commit)
5742 prepare_rev_graph(graph);
5743
5744 /* Graph visualization needs a one rev look-ahead,
5745 * so the first update doesn't visualize anything. */
5746 if (!graph->prev->commit)
5747 return;
5748
5749 if (view->lines > 2)
5750 view->line[view->lines - 3].dirty = 1;
5751 if (view->lines > 1)
5752 view->line[view->lines - 2].dirty = 1;
5753 draw_rev_graph(graph->prev);
5754 done_rev_graph(graph->prev->prev);
5755 }
5756
5757
5758 /*
5759 * Main view backend
5760 */
5761
5762 static const char *main_argv[SIZEOF_ARG] = {
5763 "git", "log", "--no-color", "--pretty=raw", "--parents",
5764 "--topo-order", "%(head)", NULL
5765 };
5766
5767 static bool
5768 main_draw(struct view *view, struct line *line, unsigned int lineno)
5769 {
5770 struct commit *commit = line->data;
5771
5772 if (!*commit->author)
5773 return FALSE;
5774
5775 if (opt_date && draw_date(view, &commit->time))
5776 return TRUE;
5777
5778 if (opt_author && draw_author(view, commit->author))
5779 return TRUE;
5780
5781 if (opt_rev_graph && commit->graph_size &&
5782 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5783 return TRUE;
5784
5785 if (opt_show_refs && commit->refs) {
5786 size_t i = 0;
5787
5788 do {
5789 enum line_type type;
5790
5791 if (commit->refs[i]->head)
5792 type = LINE_MAIN_HEAD;
5793 else if (commit->refs[i]->ltag)
5794 type = LINE_MAIN_LOCAL_TAG;
5795 else if (commit->refs[i]->tag)
5796 type = LINE_MAIN_TAG;
5797 else if (commit->refs[i]->tracked)
5798 type = LINE_MAIN_TRACKED;
5799 else if (commit->refs[i]->remote)
5800 type = LINE_MAIN_REMOTE;
5801 else
5802 type = LINE_MAIN_REF;
5803
5804 if (draw_text(view, type, "[", TRUE) ||
5805 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5806 draw_text(view, type, "]", TRUE))
5807 return TRUE;
5808
5809 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5810 return TRUE;
5811 } while (commit->refs[i++]->next);
5812 }
5813
5814 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5815 return TRUE;
5816 }
5817
5818 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5819 static bool
5820 main_read(struct view *view, char *line)
5821 {
5822 static struct rev_graph *graph = graph_stacks;
5823 enum line_type type;
5824 struct commit *commit;
5825
5826 if (!line) {
5827 int i;
5828
5829 if (!view->lines && !view->parent)
5830 die("No revisions match the given arguments.");
5831 if (view->lines > 0) {
5832 commit = view->line[view->lines - 1].data;
5833 view->line[view->lines - 1].dirty = 1;
5834 if (!*commit->author) {
5835 view->lines--;
5836 free(commit);
5837 graph->commit = NULL;
5838 }
5839 }
5840 update_rev_graph(view, graph);
5841
5842 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5843 clear_rev_graph(&graph_stacks[i]);
5844 return TRUE;
5845 }
5846
5847 type = get_line_type(line);
5848 if (type == LINE_COMMIT) {
5849 commit = calloc(1, sizeof(struct commit));
5850 if (!commit)
5851 return FALSE;
5852
5853 line += STRING_SIZE("commit ");
5854 if (*line == '-') {
5855 graph->boundary = 1;
5856 line++;
5857 }
5858
5859 string_copy_rev(commit->id, line);
5860 commit->refs = get_refs(commit->id);
5861 graph->commit = commit;
5862 add_line_data(view, commit, LINE_MAIN_COMMIT);
5863
5864 while ((line = strchr(line, ' '))) {
5865 line++;
5866 push_rev_graph(graph->parents, line);
5867 commit->has_parents = TRUE;
5868 }
5869 return TRUE;
5870 }
5871
5872 if (!view->lines)
5873 return TRUE;
5874 commit = view->line[view->lines - 1].data;
5875
5876 switch (type) {
5877 case LINE_PARENT:
5878 if (commit->has_parents)
5879 break;
5880 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5881 break;
5882
5883 case LINE_AUTHOR:
5884 parse_author_line(line + STRING_SIZE("author "),
5885 commit->author, sizeof(commit->author),
5886 &commit->time);
5887 update_rev_graph(view, graph);
5888 graph = graph->next;
5889 break;
5890
5891 default:
5892 /* Fill in the commit title if it has not already been set. */
5893 if (commit->title[0])
5894 break;
5895
5896 /* Require titles to start with a non-space character at the
5897 * offset used by git log. */
5898 if (strncmp(line, " ", 4))
5899 break;
5900 line += 4;
5901 /* Well, if the title starts with a whitespace character,
5902 * try to be forgiving. Otherwise we end up with no title. */
5903 while (isspace(*line))
5904 line++;
5905 if (*line == '\0')
5906 break;
5907 /* FIXME: More graceful handling of titles; append "..." to
5908 * shortened titles, etc. */
5909
5910 string_expand(commit->title, sizeof(commit->title), line, 1);
5911 view->line[view->lines - 1].dirty = 1;
5912 }
5913
5914 return TRUE;
5915 }
5916
5917 static enum request
5918 main_request(struct view *view, enum request request, struct line *line)
5919 {
5920 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5921
5922 switch (request) {
5923 case REQ_ENTER:
5924 open_view(view, REQ_VIEW_DIFF, flags);
5925 break;
5926 case REQ_REFRESH:
5927 load_refs();
5928 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5929 break;
5930 default:
5931 return request;
5932 }
5933
5934 return REQ_NONE;
5935 }
5936
5937 static bool
5938 grep_refs(struct ref **refs, regex_t *regex)
5939 {
5940 regmatch_t pmatch;
5941 size_t i = 0;
5942
5943 if (!refs)
5944 return FALSE;
5945 do {
5946 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5947 return TRUE;
5948 } while (refs[i++]->next);
5949
5950 return FALSE;
5951 }
5952
5953 static bool
5954 main_grep(struct view *view, struct line *line)
5955 {
5956 struct commit *commit = line->data;
5957 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5958 char buf[DATE_COLS + 1];
5959 regmatch_t pmatch;
5960
5961 for (state = S_TITLE; state < S_END; state++) {
5962 char *text;
5963
5964 switch (state) {
5965 case S_TITLE: text = commit->title; break;
5966 case S_AUTHOR:
5967 if (!opt_author)
5968 continue;
5969 text = commit->author;
5970 break;
5971 case S_DATE:
5972 if (!opt_date)
5973 continue;
5974 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5975 continue;
5976 text = buf;
5977 break;
5978 case S_REFS:
5979 if (!opt_show_refs)
5980 continue;
5981 if (grep_refs(commit->refs, view->regex) == TRUE)
5982 return TRUE;
5983 continue;
5984 default:
5985 return FALSE;
5986 }
5987
5988 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5989 return TRUE;
5990 }
5991
5992 return FALSE;
5993 }
5994
5995 static void
5996 main_select(struct view *view, struct line *line)
5997 {
5998 struct commit *commit = line->data;
5999
6000 string_copy_rev(view->ref, commit->id);
6001 string_copy_rev(ref_commit, view->ref);
6002 }
6003
6004 static struct view_ops main_ops = {
6005 "commit",
6006 main_argv,
6007 NULL,
6008 main_read,
6009 main_draw,
6010 main_request,
6011 main_grep,
6012 main_select,
6013 };
6014
6015
6016 /*
6017 * Unicode / UTF-8 handling
6018 *
6019 * NOTE: Much of the following code for dealing with Unicode is derived from
6020 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
6021 * src/intl/charset.c from the UTF-8 branch commit elinks-0.11.0-g31f2c28.
6022 */
6023
6024 static inline int
6025 unicode_width(unsigned long c)
6026 {
6027 if (c >= 0x1100 &&
6028 (c <= 0x115f /* Hangul Jamo */
6029 || c == 0x2329
6030 || c == 0x232a
6031 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
6032 /* CJK ... Yi */
6033 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
6034 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
6035 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
6036 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
6037 || (c >= 0xffe0 && c <= 0xffe6)
6038 || (c >= 0x20000 && c <= 0x2fffd)
6039 || (c >= 0x30000 && c <= 0x3fffd)))
6040 return 2;
6041
6042 if (c == '\t')
6043 return opt_tab_size;
6044
6045 return 1;
6046 }
6047
6048 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
6049 * Illegal bytes are set one. */
6050 static const unsigned char utf8_bytes[256] = {
6051 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
6052 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
6053 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
6054 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
6055 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,
6056 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,
6057 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,
6058 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,
6059 };
6060
6061 /* Decode UTF-8 multi-byte representation into a Unicode character. */
6062 static inline unsigned long
6063 utf8_to_unicode(const char *string, size_t length)
6064 {
6065 unsigned long unicode;
6066
6067 switch (length) {
6068 case 1:
6069 unicode = string[0];
6070 break;
6071 case 2:
6072 unicode = (string[0] & 0x1f) << 6;
6073 unicode += (string[1] & 0x3f);
6074 break;
6075 case 3:
6076 unicode = (string[0] & 0x0f) << 12;
6077 unicode += ((string[1] & 0x3f) << 6);
6078 unicode += (string[2] & 0x3f);
6079 break;
6080 case 4:
6081 unicode = (string[0] & 0x0f) << 18;
6082 unicode += ((string[1] & 0x3f) << 12);
6083 unicode += ((string[2] & 0x3f) << 6);
6084 unicode += (string[3] & 0x3f);
6085 break;
6086 case 5:
6087 unicode = (string[0] & 0x0f) << 24;
6088 unicode += ((string[1] & 0x3f) << 18);
6089 unicode += ((string[2] & 0x3f) << 12);
6090 unicode += ((string[3] & 0x3f) << 6);
6091 unicode += (string[4] & 0x3f);
6092 break;
6093 case 6:
6094 unicode = (string[0] & 0x01) << 30;
6095 unicode += ((string[1] & 0x3f) << 24);
6096 unicode += ((string[2] & 0x3f) << 18);
6097 unicode += ((string[3] & 0x3f) << 12);
6098 unicode += ((string[4] & 0x3f) << 6);
6099 unicode += (string[5] & 0x3f);
6100 break;
6101 default:
6102 die("Invalid Unicode length");
6103 }
6104
6105 /* Invalid characters could return the special 0xfffd value but NUL
6106 * should be just as good. */
6107 return unicode > 0xffff ? 0 : unicode;
6108 }
6109
6110 /* Calculates how much of string can be shown within the given maximum width
6111 * and sets trimmed parameter to non-zero value if all of string could not be
6112 * shown. If the reserve flag is TRUE, it will reserve at least one
6113 * trailing character, which can be useful when drawing a delimiter.
6114 *
6115 * Returns the number of bytes to output from string to satisfy max_width. */
6116 static size_t
6117 utf8_length(const char **start, size_t skip, int *width, size_t max_width, int *trimmed, bool reserve)
6118 {
6119 const char *string = *start;
6120 const char *end = strchr(string, '\0');
6121 unsigned char last_bytes = 0;
6122 size_t last_ucwidth = 0;
6123
6124 *width = 0;
6125 *trimmed = 0;
6126
6127 while (string < end) {
6128 int c = *(unsigned char *) string;
6129 unsigned char bytes = utf8_bytes[c];
6130 size_t ucwidth;
6131 unsigned long unicode;
6132
6133 if (string + bytes > end)
6134 break;
6135
6136 /* Change representation to figure out whether
6137 * it is a single- or double-width character. */
6138
6139 unicode = utf8_to_unicode(string, bytes);
6140 /* FIXME: Graceful handling of invalid Unicode character. */
6141 if (!unicode)
6142 break;
6143
6144 ucwidth = unicode_width(unicode);
6145 if (skip > 0) {
6146 skip -= ucwidth <= skip ? ucwidth : skip;
6147 *start += bytes;
6148 }
6149 *width += ucwidth;
6150 if (*width > max_width) {
6151 *trimmed = 1;
6152 *width -= ucwidth;
6153 if (reserve && *width == max_width) {
6154 string -= last_bytes;
6155 *width -= last_ucwidth;
6156 }
6157 break;
6158 }
6159
6160 string += bytes;
6161 last_bytes = ucwidth ? bytes : 0;
6162 last_ucwidth = ucwidth;
6163 }
6164
6165 return string - *start;
6166 }
6167
6168
6169 /*
6170 * Status management
6171 */
6172
6173 /* Whether or not the curses interface has been initialized. */
6174 static bool cursed = FALSE;
6175
6176 /* Terminal hacks and workarounds. */
6177 static bool use_scroll_redrawwin;
6178 static bool use_scroll_status_wclear;
6179
6180 /* The status window is used for polling keystrokes. */
6181 static WINDOW *status_win;
6182
6183 /* Reading from the prompt? */
6184 static bool input_mode = FALSE;
6185
6186 static bool status_empty = FALSE;
6187
6188 /* Update status and title window. */
6189 static void
6190 report(const char *msg, ...)
6191 {
6192 struct view *view = display[current_view];
6193
6194 if (input_mode)
6195 return;
6196
6197 if (!view) {
6198 char buf[SIZEOF_STR];
6199 va_list args;
6200
6201 va_start(args, msg);
6202 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6203 buf[sizeof(buf) - 1] = 0;
6204 buf[sizeof(buf) - 2] = '.';
6205 buf[sizeof(buf) - 3] = '.';
6206 buf[sizeof(buf) - 4] = '.';
6207 }
6208 va_end(args);
6209 die("%s", buf);
6210 }
6211
6212 if (!status_empty || *msg) {
6213 va_list args;
6214
6215 va_start(args, msg);
6216
6217 wmove(status_win, 0, 0);
6218 if (view->has_scrolled && use_scroll_status_wclear)
6219 wclear(status_win);
6220 if (*msg) {
6221 vwprintw(status_win, msg, args);
6222 status_empty = FALSE;
6223 } else {
6224 status_empty = TRUE;
6225 }
6226 wclrtoeol(status_win);
6227 wnoutrefresh(status_win);
6228
6229 va_end(args);
6230 }
6231
6232 update_view_title(view);
6233 }
6234
6235 /* Controls when nodelay should be in effect when polling user input. */
6236 static void
6237 set_nonblocking_input(bool loading)
6238 {
6239 static unsigned int loading_views;
6240
6241 if ((loading == FALSE && loading_views-- == 1) ||
6242 (loading == TRUE && loading_views++ == 0))
6243 nodelay(status_win, loading);
6244 }
6245
6246 static void
6247 init_display(void)
6248 {
6249 const char *term;
6250 int x, y;
6251
6252 /* Initialize the curses library */
6253 if (isatty(STDIN_FILENO)) {
6254 cursed = !!initscr();
6255 opt_tty = stdin;
6256 } else {
6257 /* Leave stdin and stdout alone when acting as a pager. */
6258 opt_tty = fopen("/dev/tty", "r+");
6259 if (!opt_tty)
6260 die("Failed to open /dev/tty");
6261 cursed = !!newterm(NULL, opt_tty, opt_tty);
6262 }
6263
6264 if (!cursed)
6265 die("Failed to initialize curses");
6266
6267 nonl(); /* Disable conversion and detect newlines from input. */
6268 cbreak(); /* Take input chars one at a time, no wait for \n */
6269 noecho(); /* Don't echo input */
6270 leaveok(stdscr, FALSE);
6271
6272 if (has_colors())
6273 init_colors();
6274
6275 getmaxyx(stdscr, y, x);
6276 status_win = newwin(1, 0, y - 1, 0);
6277 if (!status_win)
6278 die("Failed to create status window");
6279
6280 /* Enable keyboard mapping */
6281 keypad(status_win, TRUE);
6282 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6283
6284 TABSIZE = opt_tab_size;
6285 if (opt_line_graphics) {
6286 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
6287 }
6288
6289 term = getenv("XTERM_VERSION") ? NULL : getenv("COLORTERM");
6290 if (term && !strcmp(term, "gnome-terminal")) {
6291 /* In the gnome-terminal-emulator, the message from
6292 * scrolling up one line when impossible followed by
6293 * scrolling down one line causes corruption of the
6294 * status line. This is fixed by calling wclear. */
6295 use_scroll_status_wclear = TRUE;
6296 use_scroll_redrawwin = FALSE;
6297
6298 } else if (term && !strcmp(term, "xrvt-xpm")) {
6299 /* No problems with full optimizations in xrvt-(unicode)
6300 * and aterm. */
6301 use_scroll_status_wclear = use_scroll_redrawwin = FALSE;
6302
6303 } else {
6304 /* When scrolling in (u)xterm the last line in the
6305 * scrolling direction will update slowly. */
6306 use_scroll_redrawwin = TRUE;
6307 use_scroll_status_wclear = FALSE;
6308 }
6309 }
6310
6311 static int
6312 get_input(int prompt_position)
6313 {
6314 struct view *view;
6315 int i, key, cursor_y, cursor_x;
6316
6317 if (prompt_position)
6318 input_mode = TRUE;
6319
6320 while (TRUE) {
6321 foreach_view (view, i) {
6322 update_view(view);
6323 if (view_is_displayed(view) && view->has_scrolled &&
6324 use_scroll_redrawwin)
6325 redrawwin(view->win);
6326 view->has_scrolled = FALSE;
6327 }
6328
6329 /* Update the cursor position. */
6330 if (prompt_position) {
6331 getbegyx(status_win, cursor_y, cursor_x);
6332 cursor_x = prompt_position;
6333 } else {
6334 view = display[current_view];
6335 getbegyx(view->win, cursor_y, cursor_x);
6336 cursor_x = view->width - 1;
6337 cursor_y += view->lineno - view->offset;
6338 }
6339 setsyx(cursor_y, cursor_x);
6340
6341 /* Refresh, accept single keystroke of input */
6342 doupdate();
6343 key = wgetch(status_win);
6344
6345 /* wgetch() with nodelay() enabled returns ERR when
6346 * there's no input. */
6347 if (key == ERR) {
6348
6349 } else if (key == KEY_RESIZE) {
6350 int height, width;
6351
6352 getmaxyx(stdscr, height, width);
6353
6354 wresize(status_win, 1, width);
6355 mvwin(status_win, height - 1, 0);
6356 wnoutrefresh(status_win);
6357 resize_display();
6358 redraw_display(TRUE);
6359
6360 } else {
6361 input_mode = FALSE;
6362 return key;
6363 }
6364 }
6365 }
6366
6367 static char *
6368 prompt_input(const char *prompt, input_handler handler, void *data)
6369 {
6370 enum input_status status = INPUT_OK;
6371 static char buf[SIZEOF_STR];
6372 size_t pos = 0;
6373
6374 buf[pos] = 0;
6375
6376 while (status == INPUT_OK || status == INPUT_SKIP) {
6377 int key;
6378
6379 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6380 wclrtoeol(status_win);
6381
6382 key = get_input(pos + 1);
6383 switch (key) {
6384 case KEY_RETURN:
6385 case KEY_ENTER:
6386 case '\n':
6387 status = pos ? INPUT_STOP : INPUT_CANCEL;
6388 break;
6389
6390 case KEY_BACKSPACE:
6391 if (pos > 0)
6392 buf[--pos] = 0;
6393 else
6394 status = INPUT_CANCEL;
6395 break;
6396
6397 case KEY_ESC:
6398 status = INPUT_CANCEL;
6399 break;
6400
6401 default:
6402 if (pos >= sizeof(buf)) {
6403 report("Input string too long");
6404 return NULL;
6405 }
6406
6407 status = handler(data, buf, key);
6408 if (status == INPUT_OK)
6409 buf[pos++] = (char) key;
6410 }
6411 }
6412
6413 /* Clear the status window */
6414 status_empty = FALSE;
6415 report("");
6416
6417 if (status == INPUT_CANCEL)
6418 return NULL;
6419
6420 buf[pos++] = 0;
6421
6422 return buf;
6423 }
6424
6425 static enum input_status
6426 prompt_yesno_handler(void *data, char *buf, int c)
6427 {
6428 if (c == 'y' || c == 'Y')
6429 return INPUT_STOP;
6430 if (c == 'n' || c == 'N')
6431 return INPUT_CANCEL;
6432 return INPUT_SKIP;
6433 }
6434
6435 static bool
6436 prompt_yesno(const char *prompt)
6437 {
6438 char prompt2[SIZEOF_STR];
6439
6440 if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6441 return FALSE;
6442
6443 return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6444 }
6445
6446 static enum input_status
6447 read_prompt_handler(void *data, char *buf, int c)
6448 {
6449 return isprint(c) ? INPUT_OK : INPUT_SKIP;
6450 }
6451
6452 static char *
6453 read_prompt(const char *prompt)
6454 {
6455 return prompt_input(prompt, read_prompt_handler, NULL);
6456 }
6457
6458 /*
6459 * Repository properties
6460 */
6461
6462 static struct ref *refs = NULL;
6463 static size_t refs_alloc = 0;
6464 static size_t refs_size = 0;
6465
6466 /* Id <-> ref store */
6467 static struct ref ***id_refs = NULL;
6468 static size_t id_refs_alloc = 0;
6469 static size_t id_refs_size = 0;
6470
6471 static int
6472 compare_refs(const void *ref1_, const void *ref2_)
6473 {
6474 const struct ref *ref1 = *(const struct ref **)ref1_;
6475 const struct ref *ref2 = *(const struct ref **)ref2_;
6476
6477 if (ref1->tag != ref2->tag)
6478 return ref2->tag - ref1->tag;
6479 if (ref1->ltag != ref2->ltag)
6480 return ref2->ltag - ref2->ltag;
6481 if (ref1->head != ref2->head)
6482 return ref2->head - ref1->head;
6483 if (ref1->tracked != ref2->tracked)
6484 return ref2->tracked - ref1->tracked;
6485 if (ref1->remote != ref2->remote)
6486 return ref2->remote - ref1->remote;
6487 return strcmp(ref1->name, ref2->name);
6488 }
6489
6490 static struct ref **
6491 get_refs(const char *id)
6492 {
6493 struct ref ***tmp_id_refs;
6494 struct ref **ref_list = NULL;
6495 size_t ref_list_alloc = 0;
6496 size_t ref_list_size = 0;
6497 size_t i;
6498
6499 for (i = 0; i < id_refs_size; i++)
6500 if (!strcmp(id, id_refs[i][0]->id))
6501 return id_refs[i];
6502
6503 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
6504 sizeof(*id_refs));
6505 if (!tmp_id_refs)
6506 return NULL;
6507
6508 id_refs = tmp_id_refs;
6509
6510 for (i = 0; i < refs_size; i++) {
6511 struct ref **tmp;
6512
6513 if (strcmp(id, refs[i].id))
6514 continue;
6515
6516 tmp = realloc_items(ref_list, &ref_list_alloc,
6517 ref_list_size + 1, sizeof(*ref_list));
6518 if (!tmp) {
6519 if (ref_list)
6520 free(ref_list);
6521 return NULL;
6522 }
6523
6524 ref_list = tmp;
6525 ref_list[ref_list_size] = &refs[i];
6526 /* XXX: The properties of the commit chains ensures that we can
6527 * safely modify the shared ref. The repo references will
6528 * always be similar for the same id. */
6529 ref_list[ref_list_size]->next = 1;
6530
6531 ref_list_size++;
6532 }
6533
6534 if (ref_list) {
6535 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
6536 ref_list[ref_list_size - 1]->next = 0;
6537 id_refs[id_refs_size++] = ref_list;
6538 }
6539
6540 return ref_list;
6541 }
6542
6543 static int
6544 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6545 {
6546 struct ref *ref;
6547 bool tag = FALSE;
6548 bool ltag = FALSE;
6549 bool remote = FALSE;
6550 bool tracked = FALSE;
6551 bool check_replace = FALSE;
6552 bool head = FALSE;
6553
6554 if (!prefixcmp(name, "refs/tags/")) {
6555 if (!suffixcmp(name, namelen, "^{}")) {
6556 namelen -= 3;
6557 name[namelen] = 0;
6558 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
6559 check_replace = TRUE;
6560 } else {
6561 ltag = TRUE;
6562 }
6563
6564 tag = TRUE;
6565 namelen -= STRING_SIZE("refs/tags/");
6566 name += STRING_SIZE("refs/tags/");
6567
6568 } else if (!prefixcmp(name, "refs/remotes/")) {
6569 remote = TRUE;
6570 namelen -= STRING_SIZE("refs/remotes/");
6571 name += STRING_SIZE("refs/remotes/");
6572 tracked = !strcmp(opt_remote, name);
6573
6574 } else if (!prefixcmp(name, "refs/heads/")) {
6575 namelen -= STRING_SIZE("refs/heads/");
6576 name += STRING_SIZE("refs/heads/");
6577 head = !strncmp(opt_head, name, namelen);
6578
6579 } else if (!strcmp(name, "HEAD")) {
6580 string_ncopy(opt_head_rev, id, idlen);
6581 return OK;
6582 }
6583
6584 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
6585 /* it's an annotated tag, replace the previous SHA1 with the
6586 * resolved commit id; relies on the fact git-ls-remote lists
6587 * the commit id of an annotated tag right before the commit id
6588 * it points to. */
6589 refs[refs_size - 1].ltag = ltag;
6590 string_copy_rev(refs[refs_size - 1].id, id);
6591
6592 return OK;
6593 }
6594 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
6595 if (!refs)
6596 return ERR;
6597
6598 ref = &refs[refs_size++];
6599 ref->name = malloc(namelen + 1);
6600 if (!ref->name)
6601 return ERR;
6602
6603 strncpy(ref->name, name, namelen);
6604 ref->name[namelen] = 0;
6605 ref->head = head;
6606 ref->tag = tag;
6607 ref->ltag = ltag;
6608 ref->remote = remote;
6609 ref->tracked = tracked;
6610 string_copy_rev(ref->id, id);
6611
6612 return OK;
6613 }
6614
6615 static int
6616 load_refs(void)
6617 {
6618 static const char *ls_remote_argv[SIZEOF_ARG] = {
6619 "git", "ls-remote", ".", NULL
6620 };
6621 static bool init = FALSE;
6622
6623 if (!init) {
6624 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6625 init = TRUE;
6626 }
6627
6628 if (!*opt_git_dir)
6629 return OK;
6630
6631 while (refs_size > 0)
6632 free(refs[--refs_size].name);
6633 while (id_refs_size > 0)
6634 free(id_refs[--id_refs_size]);
6635
6636 return run_io_load(ls_remote_argv, "\t", read_ref);
6637 }
6638
6639 static void
6640 set_repo_config_option(char *name, char *value, int (*cmd)(int, const char **))
6641 {
6642 const char *argv[SIZEOF_ARG] = { name, "=" };
6643 int argc = 1 + (cmd == option_set_command);
6644 int error = ERR;
6645
6646 if (!argv_from_string(argv, &argc, value))
6647 config_msg = "Too many option arguments";
6648 else
6649 error = cmd(argc, argv);
6650
6651 if (error == ERR)
6652 warn("Option 'tig.%s': %s", name, config_msg);
6653 }
6654
6655 static int
6656 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
6657 {
6658 if (!strcmp(name, "i18n.commitencoding"))
6659 string_ncopy(opt_encoding, value, valuelen);
6660
6661 if (!strcmp(name, "core.editor"))
6662 string_ncopy(opt_editor, value, valuelen);
6663
6664 if (!prefixcmp(name, "tig.color."))
6665 set_repo_config_option(name + 10, value, option_color_command);
6666
6667 else if (!prefixcmp(name, "tig.bind."))
6668 set_repo_config_option(name + 9, value, option_bind_command);
6669
6670 else if (!prefixcmp(name, "tig."))
6671 set_repo_config_option(name + 4, value, option_set_command);
6672
6673 /* branch.<head>.remote */
6674 if (*opt_head &&
6675 !strncmp(name, "branch.", 7) &&
6676 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6677 !strcmp(name + 7 + strlen(opt_head), ".remote"))
6678 string_ncopy(opt_remote, value, valuelen);
6679
6680 if (*opt_head && *opt_remote &&
6681 !strncmp(name, "branch.", 7) &&
6682 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6683 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
6684 size_t from = strlen(opt_remote);
6685
6686 if (!prefixcmp(value, "refs/heads/")) {
6687 value += STRING_SIZE("refs/heads/");
6688 valuelen -= STRING_SIZE("refs/heads/");
6689 }
6690
6691 if (!string_format_from(opt_remote, &from, "/%s", value))
6692 opt_remote[0] = 0;
6693 }
6694
6695 return OK;
6696 }
6697
6698 static int
6699 load_git_config(void)
6700 {
6701 const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
6702
6703 return run_io_load(config_list_argv, "=", read_repo_config_option);
6704 }
6705
6706 static int
6707 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
6708 {
6709 if (!opt_git_dir[0]) {
6710 string_ncopy(opt_git_dir, name, namelen);
6711
6712 } else if (opt_is_inside_work_tree == -1) {
6713 /* This can be 3 different values depending on the
6714 * version of git being used. If git-rev-parse does not
6715 * understand --is-inside-work-tree it will simply echo
6716 * the option else either "true" or "false" is printed.
6717 * Default to true for the unknown case. */
6718 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6719
6720 } else if (*name == '.') {
6721 string_ncopy(opt_cdup, name, namelen);
6722
6723 } else {
6724 string_ncopy(opt_prefix, name, namelen);
6725 }
6726
6727 return OK;
6728 }
6729
6730 static int
6731 load_repo_info(void)
6732 {
6733 const char *head_argv[] = {
6734 "git", "symbolic-ref", "HEAD", NULL
6735 };
6736 const char *rev_parse_argv[] = {
6737 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6738 "--show-cdup", "--show-prefix", NULL
6739 };
6740
6741 if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
6742 chomp_string(opt_head);
6743 if (!prefixcmp(opt_head, "refs/heads/")) {
6744 char *offset = opt_head + STRING_SIZE("refs/heads/");
6745
6746 memmove(opt_head, offset, strlen(offset) + 1);
6747 }
6748 }
6749
6750 return run_io_load(rev_parse_argv, "=", read_repo_info);
6751 }
6752
6753
6754 /*
6755 * Main
6756 */
6757
6758 static const char usage[] =
6759 "tig " TIG_VERSION " (" __DATE__ ")\n"
6760 "\n"
6761 "Usage: tig [options] [revs] [--] [paths]\n"
6762 " or: tig show [options] [revs] [--] [paths]\n"
6763 " or: tig blame [rev] path\n"
6764 " or: tig status\n"
6765 " or: tig < [git command output]\n"
6766 "\n"
6767 "Options:\n"
6768 " -v, --version Show version and exit\n"
6769 " -h, --help Show help message and exit";
6770
6771 static void __NORETURN
6772 quit(int sig)
6773 {
6774 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6775 if (cursed)
6776 endwin();
6777 exit(0);
6778 }
6779
6780 static void __NORETURN
6781 die(const char *err, ...)
6782 {
6783 va_list args;
6784
6785 endwin();
6786
6787 va_start(args, err);
6788 fputs("tig: ", stderr);
6789 vfprintf(stderr, err, args);
6790 fputs("\n", stderr);
6791 va_end(args);
6792
6793 exit(1);
6794 }
6795
6796 static void
6797 warn(const char *msg, ...)
6798 {
6799 va_list args;
6800
6801 va_start(args, msg);
6802 fputs("tig warning: ", stderr);
6803 vfprintf(stderr, msg, args);
6804 fputs("\n", stderr);
6805 va_end(args);
6806 }
6807
6808 static enum request
6809 parse_options(int argc, const char *argv[])
6810 {
6811 enum request request = REQ_VIEW_MAIN;
6812 const char *subcommand;
6813 bool seen_dashdash = FALSE;
6814 /* XXX: This is vulnerable to the user overriding options
6815 * required for the main view parser. */
6816 const char *custom_argv[SIZEOF_ARG] = {
6817 "git", "log", "--no-color", "--pretty=raw", "--parents",
6818 "--topo-order", NULL
6819 };
6820 int i, j = 6;
6821
6822 if (!isatty(STDIN_FILENO)) {
6823 io_open(&VIEW(REQ_VIEW_PAGER)->io, "");
6824 return REQ_VIEW_PAGER;
6825 }
6826
6827 if (argc <= 1)
6828 return REQ_NONE;
6829
6830 subcommand = argv[1];
6831 if (!strcmp(subcommand, "status")) {
6832 if (argc > 2)
6833 warn("ignoring arguments after `%s'", subcommand);
6834 return REQ_VIEW_STATUS;
6835
6836 } else if (!strcmp(subcommand, "blame")) {
6837 if (argc <= 2 || argc > 4)
6838 die("invalid number of options to blame\n\n%s", usage);
6839
6840 i = 2;
6841 if (argc == 4) {
6842 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
6843 i++;
6844 }
6845
6846 string_ncopy(opt_file, argv[i], strlen(argv[i]));
6847 return REQ_VIEW_BLAME;
6848
6849 } else if (!strcmp(subcommand, "show")) {
6850 request = REQ_VIEW_DIFF;
6851
6852 } else {
6853 subcommand = NULL;
6854 }
6855
6856 if (subcommand) {
6857 custom_argv[1] = subcommand;
6858 j = 2;
6859 }
6860
6861 for (i = 1 + !!subcommand; i < argc; i++) {
6862 const char *opt = argv[i];
6863
6864 if (seen_dashdash || !strcmp(opt, "--")) {
6865 seen_dashdash = TRUE;
6866
6867 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
6868 printf("tig version %s\n", TIG_VERSION);
6869 quit(0);
6870
6871 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
6872 printf("%s\n", usage);
6873 quit(0);
6874 }
6875
6876 custom_argv[j++] = opt;
6877 if (j >= ARRAY_SIZE(custom_argv))
6878 die("command too long");
6879 }
6880
6881 if (!prepare_update(VIEW(request), custom_argv, NULL, FORMAT_NONE))
6882 die("Failed to format arguments");
6883
6884 return request;
6885 }
6886
6887 int
6888 main(int argc, const char *argv[])
6889 {
6890 enum request request = parse_options(argc, argv);
6891 struct view *view;
6892 size_t i;
6893
6894 signal(SIGINT, quit);
6895
6896 if (setlocale(LC_ALL, "")) {
6897 char *codeset = nl_langinfo(CODESET);
6898
6899 string_ncopy(opt_codeset, codeset, strlen(codeset));
6900 }
6901
6902 if (load_repo_info() == ERR)
6903 die("Failed to load repo info.");
6904
6905 if (load_options() == ERR)
6906 die("Failed to load user config.");
6907
6908 if (load_git_config() == ERR)
6909 die("Failed to load repo config.");
6910
6911 /* Require a git repository unless when running in pager mode. */
6912 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6913 die("Not a git repository");
6914
6915 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6916 opt_utf8 = FALSE;
6917
6918 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6919 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6920 if (opt_iconv == ICONV_NONE)
6921 die("Failed to initialize character set conversion");
6922 }
6923
6924 if (load_refs() == ERR)
6925 die("Failed to load refs.");
6926
6927 foreach_view (view, i)
6928 argv_from_env(view->ops->argv, view->cmd_env);
6929
6930 init_display();
6931
6932 if (request != REQ_NONE)
6933 open_view(NULL, request, OPEN_PREPARED);
6934 request = request == REQ_NONE ? REQ_VIEW_MAIN : REQ_NONE;
6935
6936 while (view_driver(display[current_view], request)) {
6937 int key = get_input(0);
6938
6939 view = display[current_view];
6940 request = get_keybinding(view->keymap, key);
6941
6942 /* Some low-level request handling. This keeps access to
6943 * status_win restricted. */
6944 switch (request) {
6945 case REQ_PROMPT:
6946 {
6947 char *cmd = read_prompt(":");
6948
6949 if (cmd && isdigit(*cmd)) {
6950 int lineno = view->lineno + 1;
6951
6952 if (parse_int(&lineno, cmd, 1, view->lines + 1) == OK) {
6953 select_view_line(view, lineno - 1);
6954 report("");
6955 } else {
6956 report("Unable to parse '%s' as a line number", cmd);
6957 }
6958
6959 } else if (cmd) {
6960 struct view *next = VIEW(REQ_VIEW_PAGER);
6961 const char *argv[SIZEOF_ARG] = { "git" };
6962 int argc = 1;
6963
6964 /* When running random commands, initially show the
6965 * command in the title. However, it maybe later be
6966 * overwritten if a commit line is selected. */
6967 string_ncopy(next->ref, cmd, strlen(cmd));
6968
6969 if (!argv_from_string(argv, &argc, cmd)) {
6970 report("Too many arguments");
6971 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
6972 report("Failed to format command");
6973 } else {
6974 open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
6975 }
6976 }
6977
6978 request = REQ_NONE;
6979 break;
6980 }
6981 case REQ_SEARCH:
6982 case REQ_SEARCH_BACK:
6983 {
6984 const char *prompt = request == REQ_SEARCH ? "/" : "?";
6985 char *search = read_prompt(prompt);
6986
6987 if (search)
6988 string_ncopy(opt_search, search, strlen(search));
6989 else if (*opt_search)
6990 request = request == REQ_SEARCH ?
6991 REQ_FIND_NEXT :
6992 REQ_FIND_PREV;
6993 else
6994 request = REQ_NONE;
6995 break;
6996 }
6997 default:
6998 break;
6999 }
7000 }
7001
7002 quit(0);
7003
7004 return 0;
7005 }
Text-mode interface for git