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Handle blaming beyond the creation of file more gracefully
[tig.git] / tig.c
blob13c167d3c49f772d12dcd680eda2658c8d5181bb
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], const char *path)
3388 {
3389 char buf[SIZEOF_STR * 4];
3390 const char *revlist_argv[] = {
3391 "git", "rev-list", "-1", "--parents", id, "--", path, 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 if (path)
3403 report("Path '%s' does not exist in the parent", path);
3404 else
3405 report("The selected commit has no parents");
3406 return FALSE;
3407 }
3408
3409 if (parents > 1) {
3410 char prompt[SIZEOF_STR];
3411 char *result;
3412
3413 if (!string_format(prompt, "Which parent? [1..%d] ", parents))
3414 return FALSE;
3415 result = prompt_input(prompt, select_commit_parent_handler, &parents);
3416 if (!result)
3417 return FALSE;
3418 parents = atoi(result);
3419 }
3420
3421 string_copy_rev(rev, &buf[41 * parents]);
3422 return TRUE;
3423 }
3424
3425 /*
3426 * Pager backend
3427 */
3428
3429 static bool
3430 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3431 {
3432 char text[SIZEOF_STR];
3433
3434 if (opt_line_number && draw_lineno(view, lineno))
3435 return TRUE;
3436
3437 string_expand(text, sizeof(text), line->data, opt_tab_size);
3438 draw_text(view, line->type, text, TRUE);
3439 return TRUE;
3440 }
3441
3442 static bool
3443 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3444 {
3445 const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3446 char refbuf[SIZEOF_STR];
3447 char *ref = NULL;
3448
3449 if (run_io_buf(describe_argv, refbuf, sizeof(refbuf)))
3450 ref = chomp_string(refbuf);
3451
3452 if (!ref || !*ref)
3453 return TRUE;
3454
3455 /* This is the only fatal call, since it can "corrupt" the buffer. */
3456 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3457 return FALSE;
3458
3459 return TRUE;
3460 }
3461
3462 static void
3463 add_pager_refs(struct view *view, struct line *line)
3464 {
3465 char buf[SIZEOF_STR];
3466 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3467 struct ref **refs;
3468 size_t bufpos = 0, refpos = 0;
3469 const char *sep = "Refs: ";
3470 bool is_tag = FALSE;
3471
3472 assert(line->type == LINE_COMMIT);
3473
3474 refs = get_refs(commit_id);
3475 if (!refs) {
3476 if (view == VIEW(REQ_VIEW_DIFF))
3477 goto try_add_describe_ref;
3478 return;
3479 }
3480
3481 do {
3482 struct ref *ref = refs[refpos];
3483 const char *fmt = ref->tag ? "%s[%s]" :
3484 ref->remote ? "%s<%s>" : "%s%s";
3485
3486 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3487 return;
3488 sep = ", ";
3489 if (ref->tag)
3490 is_tag = TRUE;
3491 } while (refs[refpos++]->next);
3492
3493 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
3494 try_add_describe_ref:
3495 /* Add <tag>-g<commit_id> "fake" reference. */
3496 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3497 return;
3498 }
3499
3500 if (bufpos == 0)
3501 return;
3502
3503 add_line_text(view, buf, LINE_PP_REFS);
3504 }
3505
3506 static bool
3507 pager_read(struct view *view, char *data)
3508 {
3509 struct line *line;
3510
3511 if (!data)
3512 return TRUE;
3513
3514 line = add_line_text(view, data, get_line_type(data));
3515 if (!line)
3516 return FALSE;
3517
3518 if (line->type == LINE_COMMIT &&
3519 (view == VIEW(REQ_VIEW_DIFF) ||
3520 view == VIEW(REQ_VIEW_LOG)))
3521 add_pager_refs(view, line);
3522
3523 return TRUE;
3524 }
3525
3526 static enum request
3527 pager_request(struct view *view, enum request request, struct line *line)
3528 {
3529 int split = 0;
3530
3531 if (request != REQ_ENTER)
3532 return request;
3533
3534 if (line->type == LINE_COMMIT &&
3535 (view == VIEW(REQ_VIEW_LOG) ||
3536 view == VIEW(REQ_VIEW_PAGER))) {
3537 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3538 split = 1;
3539 }
3540
3541 /* Always scroll the view even if it was split. That way
3542 * you can use Enter to scroll through the log view and
3543 * split open each commit diff. */
3544 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3545
3546 /* FIXME: A minor workaround. Scrolling the view will call report("")
3547 * but if we are scrolling a non-current view this won't properly
3548 * update the view title. */
3549 if (split)
3550 update_view_title(view);
3551
3552 return REQ_NONE;
3553 }
3554
3555 static bool
3556 pager_grep(struct view *view, struct line *line)
3557 {
3558 regmatch_t pmatch;
3559 char *text = line->data;
3560
3561 if (!*text)
3562 return FALSE;
3563
3564 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3565 return FALSE;
3566
3567 return TRUE;
3568 }
3569
3570 static void
3571 pager_select(struct view *view, struct line *line)
3572 {
3573 if (line->type == LINE_COMMIT) {
3574 char *text = (char *)line->data + STRING_SIZE("commit ");
3575
3576 if (view != VIEW(REQ_VIEW_PAGER))
3577 string_copy_rev(view->ref, text);
3578 string_copy_rev(ref_commit, text);
3579 }
3580 }
3581
3582 static struct view_ops pager_ops = {
3583 "line",
3584 NULL,
3585 NULL,
3586 pager_read,
3587 pager_draw,
3588 pager_request,
3589 pager_grep,
3590 pager_select,
3591 };
3592
3593 static const char *log_argv[SIZEOF_ARG] = {
3594 "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3595 };
3596
3597 static enum request
3598 log_request(struct view *view, enum request request, struct line *line)
3599 {
3600 switch (request) {
3601 case REQ_REFRESH:
3602 load_refs();
3603 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3604 return REQ_NONE;
3605 default:
3606 return pager_request(view, request, line);
3607 }
3608 }
3609
3610 static struct view_ops log_ops = {
3611 "line",
3612 log_argv,
3613 NULL,
3614 pager_read,
3615 pager_draw,
3616 log_request,
3617 pager_grep,
3618 pager_select,
3619 };
3620
3621 static const char *diff_argv[SIZEOF_ARG] = {
3622 "git", "show", "--pretty=fuller", "--no-color", "--root",
3623 "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
3624 };
3625
3626 static struct view_ops diff_ops = {
3627 "line",
3628 diff_argv,
3629 NULL,
3630 pager_read,
3631 pager_draw,
3632 pager_request,
3633 pager_grep,
3634 pager_select,
3635 };
3636
3637 /*
3638 * Help backend
3639 */
3640
3641 static bool
3642 help_open(struct view *view)
3643 {
3644 char buf[SIZEOF_STR];
3645 size_t bufpos;
3646 int i;
3647
3648 if (view->lines > 0)
3649 return TRUE;
3650
3651 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3652
3653 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3654 const char *key;
3655
3656 if (req_info[i].request == REQ_NONE)
3657 continue;
3658
3659 if (!req_info[i].request) {
3660 add_line_text(view, "", LINE_DEFAULT);
3661 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3662 continue;
3663 }
3664
3665 key = get_key(req_info[i].request);
3666 if (!*key)
3667 key = "(no key defined)";
3668
3669 for (bufpos = 0; bufpos <= req_info[i].namelen; bufpos++) {
3670 buf[bufpos] = tolower(req_info[i].name[bufpos]);
3671 if (buf[bufpos] == '_')
3672 buf[bufpos] = '-';
3673 }
3674
3675 add_line_format(view, LINE_DEFAULT, " %-25s %-20s %s",
3676 key, buf, req_info[i].help);
3677 }
3678
3679 if (run_requests) {
3680 add_line_text(view, "", LINE_DEFAULT);
3681 add_line_text(view, "External commands:", LINE_DEFAULT);
3682 }
3683
3684 for (i = 0; i < run_requests; i++) {
3685 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3686 const char *key;
3687 int argc;
3688
3689 if (!req)
3690 continue;
3691
3692 key = get_key_name(req->key);
3693 if (!*key)
3694 key = "(no key defined)";
3695
3696 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3697 if (!string_format_from(buf, &bufpos, "%s%s",
3698 argc ? " " : "", req->argv[argc]))
3699 return REQ_NONE;
3700
3701 add_line_format(view, LINE_DEFAULT, " %-10s %-14s `%s`",
3702 keymap_table[req->keymap].name, key, buf);
3703 }
3704
3705 return TRUE;
3706 }
3707
3708 static struct view_ops help_ops = {
3709 "line",
3710 NULL,
3711 help_open,
3712 NULL,
3713 pager_draw,
3714 pager_request,
3715 pager_grep,
3716 pager_select,
3717 };
3718
3719
3720 /*
3721 * Tree backend
3722 */
3723
3724 struct tree_stack_entry {
3725 struct tree_stack_entry *prev; /* Entry below this in the stack */
3726 unsigned long lineno; /* Line number to restore */
3727 char *name; /* Position of name in opt_path */
3728 };
3729
3730 /* The top of the path stack. */
3731 static struct tree_stack_entry *tree_stack = NULL;
3732 unsigned long tree_lineno = 0;
3733
3734 static void
3735 pop_tree_stack_entry(void)
3736 {
3737 struct tree_stack_entry *entry = tree_stack;
3738
3739 tree_lineno = entry->lineno;
3740 entry->name[0] = 0;
3741 tree_stack = entry->prev;
3742 free(entry);
3743 }
3744
3745 static void
3746 push_tree_stack_entry(const char *name, unsigned long lineno)
3747 {
3748 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3749 size_t pathlen = strlen(opt_path);
3750
3751 if (!entry)
3752 return;
3753
3754 entry->prev = tree_stack;
3755 entry->name = opt_path + pathlen;
3756 tree_stack = entry;
3757
3758 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3759 pop_tree_stack_entry();
3760 return;
3761 }
3762
3763 /* Move the current line to the first tree entry. */
3764 tree_lineno = 1;
3765 entry->lineno = lineno;
3766 }
3767
3768 /* Parse output from git-ls-tree(1):
3769 *
3770 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3771 */
3772
3773 #define SIZEOF_TREE_ATTR \
3774 STRING_SIZE("100644 blob f931e1d229c3e185caad4449bf5b66ed72462657\t")
3775
3776 #define SIZEOF_TREE_MODE \
3777 STRING_SIZE("100644 ")
3778
3779 #define TREE_ID_OFFSET \
3780 STRING_SIZE("100644 blob ")
3781
3782 struct tree_entry {
3783 char id[SIZEOF_REV];
3784 mode_t mode;
3785 struct tm time; /* Date from the author ident. */
3786 char author[75]; /* Author of the commit. */
3787 char name[1];
3788 };
3789
3790 static const char *
3791 tree_path(struct line *line)
3792 {
3793 return ((struct tree_entry *) line->data)->name;
3794 }
3795
3796
3797 static int
3798 tree_compare_entry(struct line *line1, struct line *line2)
3799 {
3800 if (line1->type != line2->type)
3801 return line1->type == LINE_TREE_DIR ? -1 : 1;
3802 return strcmp(tree_path(line1), tree_path(line2));
3803 }
3804
3805 static struct line *
3806 tree_entry(struct view *view, enum line_type type, const char *path,
3807 const char *mode, const char *id)
3808 {
3809 struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
3810 struct line *line = entry ? add_line_data(view, entry, type) : NULL;
3811
3812 if (!entry || !line) {
3813 free(entry);
3814 return NULL;
3815 }
3816
3817 strncpy(entry->name, path, strlen(path));
3818 if (mode)
3819 entry->mode = strtoul(mode, NULL, 8);
3820 if (id)
3821 string_copy_rev(entry->id, id);
3822
3823 return line;
3824 }
3825
3826 static bool
3827 tree_read_date(struct view *view, char *text, bool *read_date)
3828 {
3829 static char author_name[SIZEOF_STR];
3830 static struct tm author_time;
3831
3832 if (!text && *read_date) {
3833 *read_date = FALSE;
3834 return TRUE;
3835
3836 } else if (!text) {
3837 char *path = *opt_path ? opt_path : ".";
3838 /* Find next entry to process */
3839 const char *log_file[] = {
3840 "git", "log", "--no-color", "--pretty=raw",
3841 "--cc", "--raw", view->id, "--", path, NULL
3842 };
3843 struct io io = {};
3844
3845 if (!view->lines) {
3846 tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL);
3847 report("Tree is empty");
3848 return TRUE;
3849 }
3850
3851 if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
3852 report("Failed to load tree data");
3853 return TRUE;
3854 }
3855
3856 done_io(view->pipe);
3857 view->io = io;
3858 *read_date = TRUE;
3859 return FALSE;
3860
3861 } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
3862 parse_author_line(text + STRING_SIZE("author "),
3863 author_name, sizeof(author_name), &author_time);
3864
3865 } else if (*text == ':') {
3866 char *pos;
3867 size_t annotated = 1;
3868 size_t i;
3869
3870 pos = strchr(text, '\t');
3871 if (!pos)
3872 return TRUE;
3873 text = pos + 1;
3874 if (*opt_prefix && !strncmp(text, opt_prefix, strlen(opt_prefix)))
3875 text += strlen(opt_prefix);
3876 if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
3877 text += strlen(opt_path);
3878 pos = strchr(text, '/');
3879 if (pos)
3880 *pos = 0;
3881
3882 for (i = 1; i < view->lines; i++) {
3883 struct line *line = &view->line[i];
3884 struct tree_entry *entry = line->data;
3885
3886 annotated += !!*entry->author;
3887 if (*entry->author || strcmp(entry->name, text))
3888 continue;
3889
3890 string_copy(entry->author, author_name);
3891 memcpy(&entry->time, &author_time, sizeof(entry->time));
3892 line->dirty = 1;
3893 break;
3894 }
3895
3896 if (annotated == view->lines)
3897 kill_io(view->pipe);
3898 }
3899 return TRUE;
3900 }
3901
3902 static bool
3903 tree_read(struct view *view, char *text)
3904 {
3905 static bool read_date = FALSE;
3906 struct tree_entry *data;
3907 struct line *entry, *line;
3908 enum line_type type;
3909 size_t textlen = text ? strlen(text) : 0;
3910 char *path = text + SIZEOF_TREE_ATTR;
3911
3912 if (read_date || !text)
3913 return tree_read_date(view, text, &read_date);
3914
3915 if (textlen <= SIZEOF_TREE_ATTR)
3916 return FALSE;
3917 if (view->lines == 0 &&
3918 !tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL))
3919 return FALSE;
3920
3921 /* Strip the path part ... */
3922 if (*opt_path) {
3923 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3924 size_t striplen = strlen(opt_path);
3925
3926 if (pathlen > striplen)
3927 memmove(path, path + striplen,
3928 pathlen - striplen + 1);
3929
3930 /* Insert "link" to parent directory. */
3931 if (view->lines == 1 &&
3932 !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
3933 return FALSE;
3934 }
3935
3936 type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
3937 entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
3938 if (!entry)
3939 return FALSE;
3940 data = entry->data;
3941
3942 /* Skip "Directory ..." and ".." line. */
3943 for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
3944 if (tree_compare_entry(line, entry) <= 0)
3945 continue;
3946
3947 memmove(line + 1, line, (entry - line) * sizeof(*entry));
3948
3949 line->data = data;
3950 line->type = type;
3951 for (; line <= entry; line++)
3952 line->dirty = line->cleareol = 1;
3953 return TRUE;
3954 }
3955
3956 if (tree_lineno > view->lineno) {
3957 view->lineno = tree_lineno;
3958 tree_lineno = 0;
3959 }
3960
3961 return TRUE;
3962 }
3963
3964 static bool
3965 tree_draw(struct view *view, struct line *line, unsigned int lineno)
3966 {
3967 struct tree_entry *entry = line->data;
3968
3969 if (line->type == LINE_TREE_HEAD) {
3970 if (draw_text(view, line->type, "Directory path /", TRUE))
3971 return TRUE;
3972 } else {
3973 if (draw_mode(view, entry->mode))
3974 return TRUE;
3975
3976 if (opt_author && draw_author(view, entry->author))
3977 return TRUE;
3978
3979 if (opt_date && draw_date(view, *entry->author ? &entry->time : NULL))
3980 return TRUE;
3981 }
3982 if (draw_text(view, line->type, entry->name, TRUE))
3983 return TRUE;
3984 return TRUE;
3985 }
3986
3987 static void
3988 open_blob_editor()
3989 {
3990 char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
3991 int fd = mkstemp(file);
3992
3993 if (fd == -1)
3994 report("Failed to create temporary file");
3995 else if (!run_io_append(blob_ops.argv, FORMAT_ALL, fd))
3996 report("Failed to save blob data to file");
3997 else
3998 open_editor(FALSE, file);
3999 if (fd != -1)
4000 unlink(file);
4001 }
4002
4003 static enum request
4004 tree_request(struct view *view, enum request request, struct line *line)
4005 {
4006 enum open_flags flags;
4007
4008 switch (request) {
4009 case REQ_VIEW_BLAME:
4010 if (line->type != LINE_TREE_FILE) {
4011 report("Blame only supported for files");
4012 return REQ_NONE;
4013 }
4014
4015 string_copy(opt_ref, view->vid);
4016 return request;
4017
4018 case REQ_EDIT:
4019 if (line->type != LINE_TREE_FILE) {
4020 report("Edit only supported for files");
4021 } else if (!is_head_commit(view->vid)) {
4022 open_blob_editor();
4023 } else {
4024 open_editor(TRUE, opt_file);
4025 }
4026 return REQ_NONE;
4027
4028 case REQ_PARENT:
4029 if (!*opt_path) {
4030 /* quit view if at top of tree */
4031 return REQ_VIEW_CLOSE;
4032 }
4033 /* fake 'cd ..' */
4034 line = &view->line[1];
4035 break;
4036
4037 case REQ_ENTER:
4038 break;
4039
4040 default:
4041 return request;
4042 }
4043
4044 /* Cleanup the stack if the tree view is at a different tree. */
4045 while (!*opt_path && tree_stack)
4046 pop_tree_stack_entry();
4047
4048 switch (line->type) {
4049 case LINE_TREE_DIR:
4050 /* Depending on whether it is a subdirectory or parent link
4051 * mangle the path buffer. */
4052 if (line == &view->line[1] && *opt_path) {
4053 pop_tree_stack_entry();
4054
4055 } else {
4056 const char *basename = tree_path(line);
4057
4058 push_tree_stack_entry(basename, view->lineno);
4059 }
4060
4061 /* Trees and subtrees share the same ID, so they are not not
4062 * unique like blobs. */
4063 flags = OPEN_RELOAD;
4064 request = REQ_VIEW_TREE;
4065 break;
4066
4067 case LINE_TREE_FILE:
4068 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4069 request = REQ_VIEW_BLOB;
4070 break;
4071
4072 default:
4073 return REQ_NONE;
4074 }
4075
4076 open_view(view, request, flags);
4077 if (request == REQ_VIEW_TREE)
4078 view->lineno = tree_lineno;
4079
4080 return REQ_NONE;
4081 }
4082
4083 static void
4084 tree_select(struct view *view, struct line *line)
4085 {
4086 struct tree_entry *entry = line->data;
4087
4088 if (line->type == LINE_TREE_FILE) {
4089 string_copy_rev(ref_blob, entry->id);
4090 string_format(opt_file, "%s%s", opt_path, tree_path(line));
4091
4092 } else if (line->type != LINE_TREE_DIR) {
4093 return;
4094 }
4095
4096 string_copy_rev(view->ref, entry->id);
4097 }
4098
4099 static const char *tree_argv[SIZEOF_ARG] = {
4100 "git", "ls-tree", "%(commit)", "%(directory)", NULL
4101 };
4102
4103 static struct view_ops tree_ops = {
4104 "file",
4105 tree_argv,
4106 NULL,
4107 tree_read,
4108 tree_draw,
4109 tree_request,
4110 pager_grep,
4111 tree_select,
4112 };
4113
4114 static bool
4115 blob_read(struct view *view, char *line)
4116 {
4117 if (!line)
4118 return TRUE;
4119 return add_line_text(view, line, LINE_DEFAULT) != NULL;
4120 }
4121
4122 static enum request
4123 blob_request(struct view *view, enum request request, struct line *line)
4124 {
4125 switch (request) {
4126 case REQ_EDIT:
4127 open_blob_editor();
4128 return REQ_NONE;
4129 default:
4130 return pager_request(view, request, line);
4131 }
4132 }
4133
4134 static const char *blob_argv[SIZEOF_ARG] = {
4135 "git", "cat-file", "blob", "%(blob)", NULL
4136 };
4137
4138 static struct view_ops blob_ops = {
4139 "line",
4140 blob_argv,
4141 NULL,
4142 blob_read,
4143 pager_draw,
4144 blob_request,
4145 pager_grep,
4146 pager_select,
4147 };
4148
4149 /*
4150 * Blame backend
4151 *
4152 * Loading the blame view is a two phase job:
4153 *
4154 * 1. File content is read either using opt_file from the
4155 * filesystem or using git-cat-file.
4156 * 2. Then blame information is incrementally added by
4157 * reading output from git-blame.
4158 */
4159
4160 static const char *blame_head_argv[] = {
4161 "git", "blame", "--incremental", "--", "%(file)", NULL
4162 };
4163
4164 static const char *blame_ref_argv[] = {
4165 "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
4166 };
4167
4168 static const char *blame_cat_file_argv[] = {
4169 "git", "cat-file", "blob", "%(ref):%(file)", NULL
4170 };
4171
4172 struct blame_commit {
4173 char id[SIZEOF_REV]; /* SHA1 ID. */
4174 char title[128]; /* First line of the commit message. */
4175 char author[75]; /* Author of the commit. */
4176 struct tm time; /* Date from the author ident. */
4177 char filename[128]; /* Name of file. */
4178 bool has_previous; /* Was a "previous" line detected. */
4179 };
4180
4181 struct blame {
4182 struct blame_commit *commit;
4183 unsigned long lineno;
4184 char text[1];
4185 };
4186
4187 static bool
4188 blame_open(struct view *view)
4189 {
4190 if (*opt_ref || !io_open(&view->io, opt_file)) {
4191 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
4192 return FALSE;
4193 }
4194
4195 setup_update(view, opt_file);
4196 string_format(view->ref, "%s ...", opt_file);
4197
4198 return TRUE;
4199 }
4200
4201 static struct blame_commit *
4202 get_blame_commit(struct view *view, const char *id)
4203 {
4204 size_t i;
4205
4206 for (i = 0; i < view->lines; i++) {
4207 struct blame *blame = view->line[i].data;
4208
4209 if (!blame->commit)
4210 continue;
4211
4212 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4213 return blame->commit;
4214 }
4215
4216 {
4217 struct blame_commit *commit = calloc(1, sizeof(*commit));
4218
4219 if (commit)
4220 string_ncopy(commit->id, id, SIZEOF_REV);
4221 return commit;
4222 }
4223 }
4224
4225 static bool
4226 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4227 {
4228 const char *pos = *posref;
4229
4230 *posref = NULL;
4231 pos = strchr(pos + 1, ' ');
4232 if (!pos || !isdigit(pos[1]))
4233 return FALSE;
4234 *number = atoi(pos + 1);
4235 if (*number < min || *number > max)
4236 return FALSE;
4237
4238 *posref = pos;
4239 return TRUE;
4240 }
4241
4242 static struct blame_commit *
4243 parse_blame_commit(struct view *view, const char *text, int *blamed)
4244 {
4245 struct blame_commit *commit;
4246 struct blame *blame;
4247 const char *pos = text + SIZEOF_REV - 2;
4248 size_t orig_lineno = 0;
4249 size_t lineno;
4250 size_t group;
4251
4252 if (strlen(text) <= SIZEOF_REV || pos[1] != ' ')
4253 return NULL;
4254
4255 if (!parse_number(&pos, &orig_lineno, 1, 9999999) ||
4256 !parse_number(&pos, &lineno, 1, view->lines) ||
4257 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4258 return NULL;
4259
4260 commit = get_blame_commit(view, text);
4261 if (!commit)
4262 return NULL;
4263
4264 *blamed += group;
4265 while (group--) {
4266 struct line *line = &view->line[lineno + group - 1];
4267
4268 blame = line->data;
4269 blame->commit = commit;
4270 blame->lineno = orig_lineno + group - 1;
4271 line->dirty = 1;
4272 }
4273
4274 return commit;
4275 }
4276
4277 static bool
4278 blame_read_file(struct view *view, const char *line, bool *read_file)
4279 {
4280 if (!line) {
4281 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
4282 struct io io = {};
4283
4284 if (view->lines == 0 && !view->parent)
4285 die("No blame exist for %s", view->vid);
4286
4287 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
4288 report("Failed to load blame data");
4289 return TRUE;
4290 }
4291
4292 done_io(view->pipe);
4293 view->io = io;
4294 *read_file = FALSE;
4295 return FALSE;
4296
4297 } else {
4298 size_t linelen = strlen(line);
4299 struct blame *blame = malloc(sizeof(*blame) + linelen);
4300
4301 if (!blame)
4302 return FALSE;
4303
4304 blame->commit = NULL;
4305 strncpy(blame->text, line, linelen);
4306 blame->text[linelen] = 0;
4307 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4308 }
4309 }
4310
4311 static bool
4312 match_blame_header(const char *name, char **line)
4313 {
4314 size_t namelen = strlen(name);
4315 bool matched = !strncmp(name, *line, namelen);
4316
4317 if (matched)
4318 *line += namelen;
4319
4320 return matched;
4321 }
4322
4323 static bool
4324 blame_read(struct view *view, char *line)
4325 {
4326 static struct blame_commit *commit = NULL;
4327 static int blamed = 0;
4328 static time_t author_time;
4329 static bool read_file = TRUE;
4330
4331 if (read_file)
4332 return blame_read_file(view, line, &read_file);
4333
4334 if (!line) {
4335 /* Reset all! */
4336 commit = NULL;
4337 blamed = 0;
4338 read_file = TRUE;
4339 string_format(view->ref, "%s", view->vid);
4340 if (view_is_displayed(view)) {
4341 update_view_title(view);
4342 redraw_view_from(view, 0);
4343 }
4344 return TRUE;
4345 }
4346
4347 if (!commit) {
4348 commit = parse_blame_commit(view, line, &blamed);
4349 string_format(view->ref, "%s %2d%%", view->vid,
4350 view->lines ? blamed * 100 / view->lines : 0);
4351
4352 } else if (match_blame_header("author ", &line)) {
4353 string_ncopy(commit->author, line, strlen(line));
4354
4355 } else if (match_blame_header("author-time ", &line)) {
4356 author_time = (time_t) atol(line);
4357
4358 } else if (match_blame_header("author-tz ", &line)) {
4359 parse_timezone(&author_time, line);
4360 gmtime_r(&author_time, &commit->time);
4361
4362 } else if (match_blame_header("summary ", &line)) {
4363 string_ncopy(commit->title, line, strlen(line));
4364
4365 } else if (match_blame_header("previous ", &line)) {
4366 commit->has_previous = TRUE;
4367
4368 } else if (match_blame_header("filename ", &line)) {
4369 string_ncopy(commit->filename, line, strlen(line));
4370 commit = NULL;
4371 }
4372
4373 return TRUE;
4374 }
4375
4376 static bool
4377 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4378 {
4379 struct blame *blame = line->data;
4380 struct tm *time = NULL;
4381 const char *id = NULL, *author = NULL;
4382 char text[SIZEOF_STR];
4383
4384 if (blame->commit && *blame->commit->filename) {
4385 id = blame->commit->id;
4386 author = blame->commit->author;
4387 time = &blame->commit->time;
4388 }
4389
4390 if (opt_date && draw_date(view, time))
4391 return TRUE;
4392
4393 if (opt_author && draw_author(view, author))
4394 return TRUE;
4395
4396 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4397 return TRUE;
4398
4399 if (draw_lineno(view, lineno))
4400 return TRUE;
4401
4402 string_expand(text, sizeof(text), blame->text, opt_tab_size);
4403 draw_text(view, LINE_DEFAULT, text, TRUE);
4404 return TRUE;
4405 }
4406
4407 static bool
4408 check_blame_commit(struct blame *blame)
4409 {
4410 if (!blame->commit)
4411 report("Commit data not loaded yet");
4412 else if (!strcmp(blame->commit->id, NULL_ID))
4413 report("No commit exist for the selected line");
4414 else
4415 return TRUE;
4416 return FALSE;
4417 }
4418
4419 static void
4420 setup_blame_parent_line(struct view *view, struct blame *blame)
4421 {
4422 const char *diff_tree_argv[] = {
4423 "git", "diff-tree", "-U0", blame->commit->id,
4424 "--", blame->commit->filename, NULL
4425 };
4426 struct io io = {};
4427 int parent_lineno = -1;
4428 int blamed_lineno = -1;
4429 char *line;
4430
4431 if (!run_io(&io, diff_tree_argv, NULL, IO_RD))
4432 return;
4433
4434 while ((line = io_get(&io, '\n', TRUE))) {
4435 if (*line == '@') {
4436 char *pos = strchr(line, '+');
4437
4438 parent_lineno = atoi(line + 4);
4439 if (pos)
4440 blamed_lineno = atoi(pos + 1);
4441
4442 } else if (*line == '+' && parent_lineno != -1) {
4443 if (blame->lineno == blamed_lineno - 1 &&
4444 !strcmp(blame->text, line + 1)) {
4445 view->lineno = parent_lineno ? parent_lineno - 1 : 0;
4446 break;
4447 }
4448 blamed_lineno++;
4449 }
4450 }
4451
4452 done_io(&io);
4453 }
4454
4455 static enum request
4456 blame_request(struct view *view, enum request request, struct line *line)
4457 {
4458 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4459 struct blame *blame = line->data;
4460
4461 switch (request) {
4462 case REQ_VIEW_BLAME:
4463 if (check_blame_commit(blame)) {
4464 string_copy(opt_ref, blame->commit->id);
4465 string_copy(opt_file, blame->commit->filename);
4466 if (blame->lineno)
4467 view->lineno = blame->lineno;
4468 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4469 }
4470 break;
4471
4472 case REQ_PARENT:
4473 if (check_blame_commit(blame) &&
4474 select_commit_parent(blame->commit->id, opt_ref,
4475 blame->commit->filename)) {
4476 string_copy(opt_file, blame->commit->filename);
4477 setup_blame_parent_line(view, blame);
4478 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4479 }
4480 break;
4481
4482 case REQ_ENTER:
4483 if (!blame->commit) {
4484 report("No commit loaded yet");
4485 break;
4486 }
4487
4488 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4489 !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4490 break;
4491
4492 if (!strcmp(blame->commit->id, NULL_ID)) {
4493 struct view *diff = VIEW(REQ_VIEW_DIFF);
4494 const char *diff_index_argv[] = {
4495 "git", "diff-index", "--root", "--patch-with-stat",
4496 "-C", "-M", "HEAD", "--", view->vid, NULL
4497 };
4498
4499 if (!blame->commit->has_previous) {
4500 diff_index_argv[1] = "diff";
4501 diff_index_argv[2] = "--no-color";
4502 diff_index_argv[6] = "--";
4503 diff_index_argv[7] = "/dev/null";
4504 }
4505
4506 if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4507 report("Failed to allocate diff command");
4508 break;
4509 }
4510 flags |= OPEN_PREPARED;
4511 }
4512
4513 open_view(view, REQ_VIEW_DIFF, flags);
4514 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4515 string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4516 break;
4517
4518 default:
4519 return request;
4520 }
4521
4522 return REQ_NONE;
4523 }
4524
4525 static bool
4526 blame_grep(struct view *view, struct line *line)
4527 {
4528 struct blame *blame = line->data;
4529 struct blame_commit *commit = blame->commit;
4530 regmatch_t pmatch;
4531
4532 #define MATCH(text, on) \
4533 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4534
4535 if (commit) {
4536 char buf[DATE_COLS + 1];
4537
4538 if (MATCH(commit->title, 1) ||
4539 MATCH(commit->author, opt_author) ||
4540 MATCH(commit->id, opt_date))
4541 return TRUE;
4542
4543 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
4544 MATCH(buf, 1))
4545 return TRUE;
4546 }
4547
4548 return MATCH(blame->text, 1);
4549
4550 #undef MATCH
4551 }
4552
4553 static void
4554 blame_select(struct view *view, struct line *line)
4555 {
4556 struct blame *blame = line->data;
4557 struct blame_commit *commit = blame->commit;
4558
4559 if (!commit)
4560 return;
4561
4562 if (!strcmp(commit->id, NULL_ID))
4563 string_ncopy(ref_commit, "HEAD", 4);
4564 else
4565 string_copy_rev(ref_commit, commit->id);
4566 }
4567
4568 static struct view_ops blame_ops = {
4569 "line",
4570 NULL,
4571 blame_open,
4572 blame_read,
4573 blame_draw,
4574 blame_request,
4575 blame_grep,
4576 blame_select,
4577 };
4578
4579 /*
4580 * Status backend
4581 */
4582
4583 struct status {
4584 char status;
4585 struct {
4586 mode_t mode;
4587 char rev[SIZEOF_REV];
4588 char name[SIZEOF_STR];
4589 } old;
4590 struct {
4591 mode_t mode;
4592 char rev[SIZEOF_REV];
4593 char name[SIZEOF_STR];
4594 } new;
4595 };
4596
4597 static char status_onbranch[SIZEOF_STR];
4598 static struct status stage_status;
4599 static enum line_type stage_line_type;
4600 static size_t stage_chunks;
4601 static int *stage_chunk;
4602
4603 /* This should work even for the "On branch" line. */
4604 static inline bool
4605 status_has_none(struct view *view, struct line *line)
4606 {
4607 return line < view->line + view->lines && !line[1].data;
4608 }
4609
4610 /* Get fields from the diff line:
4611 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4612 */
4613 static inline bool
4614 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4615 {
4616 const char *old_mode = buf + 1;
4617 const char *new_mode = buf + 8;
4618 const char *old_rev = buf + 15;
4619 const char *new_rev = buf + 56;
4620 const char *status = buf + 97;
4621
4622 if (bufsize < 98 ||
4623 old_mode[-1] != ':' ||
4624 new_mode[-1] != ' ' ||
4625 old_rev[-1] != ' ' ||
4626 new_rev[-1] != ' ' ||
4627 status[-1] != ' ')
4628 return FALSE;
4629
4630 file->status = *status;
4631
4632 string_copy_rev(file->old.rev, old_rev);
4633 string_copy_rev(file->new.rev, new_rev);
4634
4635 file->old.mode = strtoul(old_mode, NULL, 8);
4636 file->new.mode = strtoul(new_mode, NULL, 8);
4637
4638 file->old.name[0] = file->new.name[0] = 0;
4639
4640 return TRUE;
4641 }
4642
4643 static bool
4644 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4645 {
4646 struct status *unmerged = NULL;
4647 char *buf;
4648 struct io io = {};
4649
4650 if (!run_io(&io, argv, NULL, IO_RD))
4651 return FALSE;
4652
4653 add_line_data(view, NULL, type);
4654
4655 while ((buf = io_get(&io, 0, TRUE))) {
4656 struct status *file = unmerged;
4657
4658 if (!file) {
4659 file = calloc(1, sizeof(*file));
4660 if (!file || !add_line_data(view, file, type))
4661 goto error_out;
4662 }
4663
4664 /* Parse diff info part. */
4665 if (status) {
4666 file->status = status;
4667 if (status == 'A')
4668 string_copy(file->old.rev, NULL_ID);
4669
4670 } else if (!file->status || file == unmerged) {
4671 if (!status_get_diff(file, buf, strlen(buf)))
4672 goto error_out;
4673
4674 buf = io_get(&io, 0, TRUE);
4675 if (!buf)
4676 break;
4677
4678 /* Collapse all modified entries that follow an
4679 * associated unmerged entry. */
4680 if (unmerged == file) {
4681 unmerged->status = 'U';
4682 unmerged = NULL;
4683 } else if (file->status == 'U') {
4684 unmerged = file;
4685 }
4686 }
4687
4688 /* Grab the old name for rename/copy. */
4689 if (!*file->old.name &&
4690 (file->status == 'R' || file->status == 'C')) {
4691 string_ncopy(file->old.name, buf, strlen(buf));
4692
4693 buf = io_get(&io, 0, TRUE);
4694 if (!buf)
4695 break;
4696 }
4697
4698 /* git-ls-files just delivers a NUL separated list of
4699 * file names similar to the second half of the
4700 * git-diff-* output. */
4701 string_ncopy(file->new.name, buf, strlen(buf));
4702 if (!*file->old.name)
4703 string_copy(file->old.name, file->new.name);
4704 file = NULL;
4705 }
4706
4707 if (io_error(&io)) {
4708 error_out:
4709 done_io(&io);
4710 return FALSE;
4711 }
4712
4713 if (!view->line[view->lines - 1].data)
4714 add_line_data(view, NULL, LINE_STAT_NONE);
4715
4716 done_io(&io);
4717 return TRUE;
4718 }
4719
4720 /* Don't show unmerged entries in the staged section. */
4721 static const char *status_diff_index_argv[] = {
4722 "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4723 "--cached", "-M", "HEAD", NULL
4724 };
4725
4726 static const char *status_diff_files_argv[] = {
4727 "git", "diff-files", "-z", NULL
4728 };
4729
4730 static const char *status_list_other_argv[] = {
4731 "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
4732 };
4733
4734 static const char *status_list_no_head_argv[] = {
4735 "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4736 };
4737
4738 static const char *update_index_argv[] = {
4739 "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4740 };
4741
4742 /* Restore the previous line number to stay in the context or select a
4743 * line with something that can be updated. */
4744 static void
4745 status_restore(struct view *view)
4746 {
4747 if (view->p_lineno >= view->lines)
4748 view->p_lineno = view->lines - 1;
4749 while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
4750 view->p_lineno++;
4751 while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
4752 view->p_lineno--;
4753
4754 /* If the above fails, always skip the "On branch" line. */
4755 if (view->p_lineno < view->lines)
4756 view->lineno = view->p_lineno;
4757 else
4758 view->lineno = 1;
4759
4760 if (view->lineno < view->offset)
4761 view->offset = view->lineno;
4762 else if (view->offset + view->height <= view->lineno)
4763 view->offset = view->lineno - view->height + 1;
4764
4765 view->p_restore = FALSE;
4766 }
4767
4768 static void
4769 status_update_onbranch(void)
4770 {
4771 static const char *paths[][2] = {
4772 { "rebase-apply/rebasing", "Rebasing" },
4773 { "rebase-apply/applying", "Applying mailbox" },
4774 { "rebase-apply/", "Rebasing mailbox" },
4775 { "rebase-merge/interactive", "Interactive rebase" },
4776 { "rebase-merge/", "Rebase merge" },
4777 { "MERGE_HEAD", "Merging" },
4778 { "BISECT_LOG", "Bisecting" },
4779 { "HEAD", "On branch" },
4780 };
4781 char buf[SIZEOF_STR];
4782 struct stat stat;
4783 int i;
4784
4785 if (is_initial_commit()) {
4786 string_copy(status_onbranch, "Initial commit");
4787 return;
4788 }
4789
4790 for (i = 0; i < ARRAY_SIZE(paths); i++) {
4791 char *head = opt_head;
4792
4793 if (!string_format(buf, "%s/%s", opt_git_dir, paths[i][0]) ||
4794 lstat(buf, &stat) < 0)
4795 continue;
4796
4797 if (!*opt_head) {
4798 struct io io = {};
4799
4800 if (string_format(buf, "%s/rebase-merge/head-name", opt_git_dir) &&
4801 io_open(&io, buf) &&
4802 io_read_buf(&io, buf, sizeof(buf))) {
4803 head = chomp_string(buf);
4804 if (!prefixcmp(head, "refs/heads/"))
4805 head += STRING_SIZE("refs/heads/");
4806 }
4807 }
4808
4809 if (!string_format(status_onbranch, "%s %s", paths[i][1], head))
4810 string_copy(status_onbranch, opt_head);
4811 return;
4812 }
4813
4814 string_copy(status_onbranch, "Not currently on any branch");
4815 }
4816
4817 /* First parse staged info using git-diff-index(1), then parse unstaged
4818 * info using git-diff-files(1), and finally untracked files using
4819 * git-ls-files(1). */
4820 static bool
4821 status_open(struct view *view)
4822 {
4823 reset_view(view);
4824
4825 add_line_data(view, NULL, LINE_STAT_HEAD);
4826 status_update_onbranch();
4827
4828 run_io_bg(update_index_argv);
4829
4830 if (is_initial_commit()) {
4831 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4832 return FALSE;
4833 } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4834 return FALSE;
4835 }
4836
4837 if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4838 !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4839 return FALSE;
4840
4841 /* Restore the exact position or use the specialized restore
4842 * mode? */
4843 if (!view->p_restore)
4844 status_restore(view);
4845 return TRUE;
4846 }
4847
4848 static bool
4849 status_draw(struct view *view, struct line *line, unsigned int lineno)
4850 {
4851 struct status *status = line->data;
4852 enum line_type type;
4853 const char *text;
4854
4855 if (!status) {
4856 switch (line->type) {
4857 case LINE_STAT_STAGED:
4858 type = LINE_STAT_SECTION;
4859 text = "Changes to be committed:";
4860 break;
4861
4862 case LINE_STAT_UNSTAGED:
4863 type = LINE_STAT_SECTION;
4864 text = "Changed but not updated:";
4865 break;
4866
4867 case LINE_STAT_UNTRACKED:
4868 type = LINE_STAT_SECTION;
4869 text = "Untracked files:";
4870 break;
4871
4872 case LINE_STAT_NONE:
4873 type = LINE_DEFAULT;
4874 text = " (no files)";
4875 break;
4876
4877 case LINE_STAT_HEAD:
4878 type = LINE_STAT_HEAD;
4879 text = status_onbranch;
4880 break;
4881
4882 default:
4883 return FALSE;
4884 }
4885 } else {
4886 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4887
4888 buf[0] = status->status;
4889 if (draw_text(view, line->type, buf, TRUE))
4890 return TRUE;
4891 type = LINE_DEFAULT;
4892 text = status->new.name;
4893 }
4894
4895 draw_text(view, type, text, TRUE);
4896 return TRUE;
4897 }
4898
4899 static enum request
4900 status_enter(struct view *view, struct line *line)
4901 {
4902 struct status *status = line->data;
4903 const char *oldpath = status ? status->old.name : NULL;
4904 /* Diffs for unmerged entries are empty when passing the new
4905 * path, so leave it empty. */
4906 const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
4907 const char *info;
4908 enum open_flags split;
4909 struct view *stage = VIEW(REQ_VIEW_STAGE);
4910
4911 if (line->type == LINE_STAT_NONE ||
4912 (!status && line[1].type == LINE_STAT_NONE)) {
4913 report("No file to diff");
4914 return REQ_NONE;
4915 }
4916
4917 switch (line->type) {
4918 case LINE_STAT_STAGED:
4919 if (is_initial_commit()) {
4920 const char *no_head_diff_argv[] = {
4921 "git", "diff", "--no-color", "--patch-with-stat",
4922 "--", "/dev/null", newpath, NULL
4923 };
4924
4925 if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
4926 return REQ_QUIT;
4927 } else {
4928 const char *index_show_argv[] = {
4929 "git", "diff-index", "--root", "--patch-with-stat",
4930 "-C", "-M", "--cached", "HEAD", "--",
4931 oldpath, newpath, NULL
4932 };
4933
4934 if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
4935 return REQ_QUIT;
4936 }
4937
4938 if (status)
4939 info = "Staged changes to %s";
4940 else
4941 info = "Staged changes";
4942 break;
4943
4944 case LINE_STAT_UNSTAGED:
4945 {
4946 const char *files_show_argv[] = {
4947 "git", "diff-files", "--root", "--patch-with-stat",
4948 "-C", "-M", "--", oldpath, newpath, NULL
4949 };
4950
4951 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
4952 return REQ_QUIT;
4953 if (status)
4954 info = "Unstaged changes to %s";
4955 else
4956 info = "Unstaged changes";
4957 break;
4958 }
4959 case LINE_STAT_UNTRACKED:
4960 if (!newpath) {
4961 report("No file to show");
4962 return REQ_NONE;
4963 }
4964
4965 if (!suffixcmp(status->new.name, -1, "/")) {
4966 report("Cannot display a directory");
4967 return REQ_NONE;
4968 }
4969
4970 if (!prepare_update_file(stage, newpath))
4971 return REQ_QUIT;
4972 info = "Untracked file %s";
4973 break;
4974
4975 case LINE_STAT_HEAD:
4976 return REQ_NONE;
4977
4978 default:
4979 die("line type %d not handled in switch", line->type);
4980 }
4981
4982 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4983 open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
4984 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4985 if (status) {
4986 stage_status = *status;
4987 } else {
4988 memset(&stage_status, 0, sizeof(stage_status));
4989 }
4990
4991 stage_line_type = line->type;
4992 stage_chunks = 0;
4993 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4994 }
4995
4996 return REQ_NONE;
4997 }
4998
4999 static bool
5000 status_exists(struct status *status, enum line_type type)
5001 {
5002 struct view *view = VIEW(REQ_VIEW_STATUS);
5003 unsigned long lineno;
5004
5005 for (lineno = 0; lineno < view->lines; lineno++) {
5006 struct line *line = &view->line[lineno];
5007 struct status *pos = line->data;
5008
5009 if (line->type != type)
5010 continue;
5011 if (!pos && (!status || !status->status) && line[1].data) {
5012 select_view_line(view, lineno);
5013 return TRUE;
5014 }
5015 if (pos && !strcmp(status->new.name, pos->new.name)) {
5016 select_view_line(view, lineno);
5017 return TRUE;
5018 }
5019 }
5020
5021 return FALSE;
5022 }
5023
5024
5025 static bool
5026 status_update_prepare(struct io *io, enum line_type type)
5027 {
5028 const char *staged_argv[] = {
5029 "git", "update-index", "-z", "--index-info", NULL
5030 };
5031 const char *others_argv[] = {
5032 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
5033 };
5034
5035 switch (type) {
5036 case LINE_STAT_STAGED:
5037 return run_io(io, staged_argv, opt_cdup, IO_WR);
5038
5039 case LINE_STAT_UNSTAGED:
5040 return run_io(io, others_argv, opt_cdup, IO_WR);
5041
5042 case LINE_STAT_UNTRACKED:
5043 return run_io(io, others_argv, NULL, IO_WR);
5044
5045 default:
5046 die("line type %d not handled in switch", type);
5047 return FALSE;
5048 }
5049 }
5050
5051 static bool
5052 status_update_write(struct io *io, struct status *status, enum line_type type)
5053 {
5054 char buf[SIZEOF_STR];
5055 size_t bufsize = 0;
5056
5057 switch (type) {
5058 case LINE_STAT_STAGED:
5059 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
5060 status->old.mode,
5061 status->old.rev,
5062 status->old.name, 0))
5063 return FALSE;
5064 break;
5065
5066 case LINE_STAT_UNSTAGED:
5067 case LINE_STAT_UNTRACKED:
5068 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
5069 return FALSE;
5070 break;
5071
5072 default:
5073 die("line type %d not handled in switch", type);
5074 }
5075
5076 return io_write(io, buf, bufsize);
5077 }
5078
5079 static bool
5080 status_update_file(struct status *status, enum line_type type)
5081 {
5082 struct io io = {};
5083 bool result;
5084
5085 if (!status_update_prepare(&io, type))
5086 return FALSE;
5087
5088 result = status_update_write(&io, status, type);
5089 done_io(&io);
5090 return result;
5091 }
5092
5093 static bool
5094 status_update_files(struct view *view, struct line *line)
5095 {
5096 struct io io = {};
5097 bool result = TRUE;
5098 struct line *pos = view->line + view->lines;
5099 int files = 0;
5100 int file, done;
5101
5102 if (!status_update_prepare(&io, line->type))
5103 return FALSE;
5104
5105 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
5106 files++;
5107
5108 for (file = 0, done = 0; result && file < files; line++, file++) {
5109 int almost_done = file * 100 / files;
5110
5111 if (almost_done > done) {
5112 done = almost_done;
5113 string_format(view->ref, "updating file %u of %u (%d%% done)",
5114 file, files, done);
5115 update_view_title(view);
5116 }
5117 result = status_update_write(&io, line->data, line->type);
5118 }
5119
5120 done_io(&io);
5121 return result;
5122 }
5123
5124 static bool
5125 status_update(struct view *view)
5126 {
5127 struct line *line = &view->line[view->lineno];
5128
5129 assert(view->lines);
5130
5131 if (!line->data) {
5132 /* This should work even for the "On branch" line. */
5133 if (line < view->line + view->lines && !line[1].data) {
5134 report("Nothing to update");
5135 return FALSE;
5136 }
5137
5138 if (!status_update_files(view, line + 1)) {
5139 report("Failed to update file status");
5140 return FALSE;
5141 }
5142
5143 } else if (!status_update_file(line->data, line->type)) {
5144 report("Failed to update file status");
5145 return FALSE;
5146 }
5147
5148 return TRUE;
5149 }
5150
5151 static bool
5152 status_revert(struct status *status, enum line_type type, bool has_none)
5153 {
5154 if (!status || type != LINE_STAT_UNSTAGED) {
5155 if (type == LINE_STAT_STAGED) {
5156 report("Cannot revert changes to staged files");
5157 } else if (type == LINE_STAT_UNTRACKED) {
5158 report("Cannot revert changes to untracked files");
5159 } else if (has_none) {
5160 report("Nothing to revert");
5161 } else {
5162 report("Cannot revert changes to multiple files");
5163 }
5164 return FALSE;
5165
5166 } else {
5167 char mode[10] = "100644";
5168 const char *reset_argv[] = {
5169 "git", "update-index", "--cacheinfo", mode,
5170 status->old.rev, status->old.name, NULL
5171 };
5172 const char *checkout_argv[] = {
5173 "git", "checkout", "--", status->old.name, NULL
5174 };
5175
5176 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
5177 return FALSE;
5178 string_format(mode, "%o", status->old.mode);
5179 return (status->status != 'U' || run_io_fg(reset_argv, opt_cdup)) &&
5180 run_io_fg(checkout_argv, opt_cdup);
5181 }
5182 }
5183
5184 static enum request
5185 status_request(struct view *view, enum request request, struct line *line)
5186 {
5187 struct status *status = line->data;
5188
5189 switch (request) {
5190 case REQ_STATUS_UPDATE:
5191 if (!status_update(view))
5192 return REQ_NONE;
5193 break;
5194
5195 case REQ_STATUS_REVERT:
5196 if (!status_revert(status, line->type, status_has_none(view, line)))
5197 return REQ_NONE;
5198 break;
5199
5200 case REQ_STATUS_MERGE:
5201 if (!status || status->status != 'U') {
5202 report("Merging only possible for files with unmerged status ('U').");
5203 return REQ_NONE;
5204 }
5205 open_mergetool(status->new.name);
5206 break;
5207
5208 case REQ_EDIT:
5209 if (!status)
5210 return request;
5211 if (status->status == 'D') {
5212 report("File has been deleted.");
5213 return REQ_NONE;
5214 }
5215
5216 open_editor(status->status != '?', status->new.name);
5217 break;
5218
5219 case REQ_VIEW_BLAME:
5220 if (status) {
5221 string_copy(opt_file, status->new.name);
5222 opt_ref[0] = 0;
5223 }
5224 return request;
5225
5226 case REQ_ENTER:
5227 /* After returning the status view has been split to
5228 * show the stage view. No further reloading is
5229 * necessary. */
5230 status_enter(view, line);
5231 return REQ_NONE;
5232
5233 case REQ_REFRESH:
5234 /* Simply reload the view. */
5235 break;
5236
5237 default:
5238 return request;
5239 }
5240
5241 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5242
5243 return REQ_NONE;
5244 }
5245
5246 static void
5247 status_select(struct view *view, struct line *line)
5248 {
5249 struct status *status = line->data;
5250 char file[SIZEOF_STR] = "all files";
5251 const char *text;
5252 const char *key;
5253
5254 if (status && !string_format(file, "'%s'", status->new.name))
5255 return;
5256
5257 if (!status && line[1].type == LINE_STAT_NONE)
5258 line++;
5259
5260 switch (line->type) {
5261 case LINE_STAT_STAGED:
5262 text = "Press %s to unstage %s for commit";
5263 break;
5264
5265 case LINE_STAT_UNSTAGED:
5266 text = "Press %s to stage %s for commit";
5267 break;
5268
5269 case LINE_STAT_UNTRACKED:
5270 text = "Press %s to stage %s for addition";
5271 break;
5272
5273 case LINE_STAT_HEAD:
5274 case LINE_STAT_NONE:
5275 text = "Nothing to update";
5276 break;
5277
5278 default:
5279 die("line type %d not handled in switch", line->type);
5280 }
5281
5282 if (status && status->status == 'U') {
5283 text = "Press %s to resolve conflict in %s";
5284 key = get_key(REQ_STATUS_MERGE);
5285
5286 } else {
5287 key = get_key(REQ_STATUS_UPDATE);
5288 }
5289
5290 string_format(view->ref, text, key, file);
5291 }
5292
5293 static bool
5294 status_grep(struct view *view, struct line *line)
5295 {
5296 struct status *status = line->data;
5297 enum { S_STATUS, S_NAME, S_END } state;
5298 char buf[2] = "?";
5299 regmatch_t pmatch;
5300
5301 if (!status)
5302 return FALSE;
5303
5304 for (state = S_STATUS; state < S_END; state++) {
5305 const char *text;
5306
5307 switch (state) {
5308 case S_NAME: text = status->new.name; break;
5309 case S_STATUS:
5310 buf[0] = status->status;
5311 text = buf;
5312 break;
5313
5314 default:
5315 return FALSE;
5316 }
5317
5318 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5319 return TRUE;
5320 }
5321
5322 return FALSE;
5323 }
5324
5325 static struct view_ops status_ops = {
5326 "file",
5327 NULL,
5328 status_open,
5329 NULL,
5330 status_draw,
5331 status_request,
5332 status_grep,
5333 status_select,
5334 };
5335
5336
5337 static bool
5338 stage_diff_write(struct io *io, struct line *line, struct line *end)
5339 {
5340 while (line < end) {
5341 if (!io_write(io, line->data, strlen(line->data)) ||
5342 !io_write(io, "\n", 1))
5343 return FALSE;
5344 line++;
5345 if (line->type == LINE_DIFF_CHUNK ||
5346 line->type == LINE_DIFF_HEADER)
5347 break;
5348 }
5349
5350 return TRUE;
5351 }
5352
5353 static struct line *
5354 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5355 {
5356 for (; view->line < line; line--)
5357 if (line->type == type)
5358 return line;
5359
5360 return NULL;
5361 }
5362
5363 static bool
5364 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5365 {
5366 const char *apply_argv[SIZEOF_ARG] = {
5367 "git", "apply", "--whitespace=nowarn", NULL
5368 };
5369 struct line *diff_hdr;
5370 struct io io = {};
5371 int argc = 3;
5372
5373 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5374 if (!diff_hdr)
5375 return FALSE;
5376
5377 if (!revert)
5378 apply_argv[argc++] = "--cached";
5379 if (revert || stage_line_type == LINE_STAT_STAGED)
5380 apply_argv[argc++] = "-R";
5381 apply_argv[argc++] = "-";
5382 apply_argv[argc++] = NULL;
5383 if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
5384 return FALSE;
5385
5386 if (!stage_diff_write(&io, diff_hdr, chunk) ||
5387 !stage_diff_write(&io, chunk, view->line + view->lines))
5388 chunk = NULL;
5389
5390 done_io(&io);
5391 run_io_bg(update_index_argv);
5392
5393 return chunk ? TRUE : FALSE;
5394 }
5395
5396 static bool
5397 stage_update(struct view *view, struct line *line)
5398 {
5399 struct line *chunk = NULL;
5400
5401 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5402 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5403
5404 if (chunk) {
5405 if (!stage_apply_chunk(view, chunk, FALSE)) {
5406 report("Failed to apply chunk");
5407 return FALSE;
5408 }
5409
5410 } else if (!stage_status.status) {
5411 view = VIEW(REQ_VIEW_STATUS);
5412
5413 for (line = view->line; line < view->line + view->lines; line++)
5414 if (line->type == stage_line_type)
5415 break;
5416
5417 if (!status_update_files(view, line + 1)) {
5418 report("Failed to update files");
5419 return FALSE;
5420 }
5421
5422 } else if (!status_update_file(&stage_status, stage_line_type)) {
5423 report("Failed to update file");
5424 return FALSE;
5425 }
5426
5427 return TRUE;
5428 }
5429
5430 static bool
5431 stage_revert(struct view *view, struct line *line)
5432 {
5433 struct line *chunk = NULL;
5434
5435 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5436 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5437
5438 if (chunk) {
5439 if (!prompt_yesno("Are you sure you want to revert changes?"))
5440 return FALSE;
5441
5442 if (!stage_apply_chunk(view, chunk, TRUE)) {
5443 report("Failed to revert chunk");
5444 return FALSE;
5445 }
5446 return TRUE;
5447
5448 } else {
5449 return status_revert(stage_status.status ? &stage_status : NULL,
5450 stage_line_type, FALSE);
5451 }
5452 }
5453
5454
5455 static void
5456 stage_next(struct view *view, struct line *line)
5457 {
5458 int i;
5459
5460 if (!stage_chunks) {
5461 static size_t alloc = 0;
5462 int *tmp;
5463
5464 for (line = view->line; line < view->line + view->lines; line++) {
5465 if (line->type != LINE_DIFF_CHUNK)
5466 continue;
5467
5468 tmp = realloc_items(stage_chunk, &alloc,
5469 stage_chunks, sizeof(*tmp));
5470 if (!tmp) {
5471 report("Allocation failure");
5472 return;
5473 }
5474
5475 stage_chunk = tmp;
5476 stage_chunk[stage_chunks++] = line - view->line;
5477 }
5478 }
5479
5480 for (i = 0; i < stage_chunks; i++) {
5481 if (stage_chunk[i] > view->lineno) {
5482 do_scroll_view(view, stage_chunk[i] - view->lineno);
5483 report("Chunk %d of %d", i + 1, stage_chunks);
5484 return;
5485 }
5486 }
5487
5488 report("No next chunk found");
5489 }
5490
5491 static enum request
5492 stage_request(struct view *view, enum request request, struct line *line)
5493 {
5494 switch (request) {
5495 case REQ_STATUS_UPDATE:
5496 if (!stage_update(view, line))
5497 return REQ_NONE;
5498 break;
5499
5500 case REQ_STATUS_REVERT:
5501 if (!stage_revert(view, line))
5502 return REQ_NONE;
5503 break;
5504
5505 case REQ_STAGE_NEXT:
5506 if (stage_line_type == LINE_STAT_UNTRACKED) {
5507 report("File is untracked; press %s to add",
5508 get_key(REQ_STATUS_UPDATE));
5509 return REQ_NONE;
5510 }
5511 stage_next(view, line);
5512 return REQ_NONE;
5513
5514 case REQ_EDIT:
5515 if (!stage_status.new.name[0])
5516 return request;
5517 if (stage_status.status == 'D') {
5518 report("File has been deleted.");
5519 return REQ_NONE;
5520 }
5521
5522 open_editor(stage_status.status != '?', stage_status.new.name);
5523 break;
5524
5525 case REQ_REFRESH:
5526 /* Reload everything ... */
5527 break;
5528
5529 case REQ_VIEW_BLAME:
5530 if (stage_status.new.name[0]) {
5531 string_copy(opt_file, stage_status.new.name);
5532 opt_ref[0] = 0;
5533 }
5534 return request;
5535
5536 case REQ_ENTER:
5537 return pager_request(view, request, line);
5538
5539 default:
5540 return request;
5541 }
5542
5543 VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5544 open_view(view, REQ_VIEW_STATUS, OPEN_REFRESH);
5545
5546 /* Check whether the staged entry still exists, and close the
5547 * stage view if it doesn't. */
5548 if (!status_exists(&stage_status, stage_line_type)) {
5549 status_restore(VIEW(REQ_VIEW_STATUS));
5550 return REQ_VIEW_CLOSE;
5551 }
5552
5553 if (stage_line_type == LINE_STAT_UNTRACKED) {
5554 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5555 report("Cannot display a directory");
5556 return REQ_NONE;
5557 }
5558
5559 if (!prepare_update_file(view, stage_status.new.name)) {
5560 report("Failed to open file: %s", strerror(errno));
5561 return REQ_NONE;
5562 }
5563 }
5564 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5565
5566 return REQ_NONE;
5567 }
5568
5569 static struct view_ops stage_ops = {
5570 "line",
5571 NULL,
5572 NULL,
5573 pager_read,
5574 pager_draw,
5575 stage_request,
5576 pager_grep,
5577 pager_select,
5578 };
5579
5580
5581 /*
5582 * Revision graph
5583 */
5584
5585 struct commit {
5586 char id[SIZEOF_REV]; /* SHA1 ID. */
5587 char title[128]; /* First line of the commit message. */
5588 char author[75]; /* Author of the commit. */
5589 struct tm time; /* Date from the author ident. */
5590 struct ref **refs; /* Repository references. */
5591 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
5592 size_t graph_size; /* The width of the graph array. */
5593 bool has_parents; /* Rewritten --parents seen. */
5594 };
5595
5596 /* Size of rev graph with no "padding" columns */
5597 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5598
5599 struct rev_graph {
5600 struct rev_graph *prev, *next, *parents;
5601 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5602 size_t size;
5603 struct commit *commit;
5604 size_t pos;
5605 unsigned int boundary:1;
5606 };
5607
5608 /* Parents of the commit being visualized. */
5609 static struct rev_graph graph_parents[4];
5610
5611 /* The current stack of revisions on the graph. */
5612 static struct rev_graph graph_stacks[4] = {
5613 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5614 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5615 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5616 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5617 };
5618
5619 static inline bool
5620 graph_parent_is_merge(struct rev_graph *graph)
5621 {
5622 return graph->parents->size > 1;
5623 }
5624
5625 static inline void
5626 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5627 {
5628 struct commit *commit = graph->commit;
5629
5630 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5631 commit->graph[commit->graph_size++] = symbol;
5632 }
5633
5634 static void
5635 clear_rev_graph(struct rev_graph *graph)
5636 {
5637 graph->boundary = 0;
5638 graph->size = graph->pos = 0;
5639 graph->commit = NULL;
5640 memset(graph->parents, 0, sizeof(*graph->parents));
5641 }
5642
5643 static void
5644 done_rev_graph(struct rev_graph *graph)
5645 {
5646 if (graph_parent_is_merge(graph) &&
5647 graph->pos < graph->size - 1 &&
5648 graph->next->size == graph->size + graph->parents->size - 1) {
5649 size_t i = graph->pos + graph->parents->size - 1;
5650
5651 graph->commit->graph_size = i * 2;
5652 while (i < graph->next->size - 1) {
5653 append_to_rev_graph(graph, ' ');
5654 append_to_rev_graph(graph, '\\');
5655 i++;
5656 }
5657 }
5658
5659 clear_rev_graph(graph);
5660 }
5661
5662 static void
5663 push_rev_graph(struct rev_graph *graph, const char *parent)
5664 {
5665 int i;
5666
5667 /* "Collapse" duplicate parents lines.
5668 *
5669 * FIXME: This needs to also update update the drawn graph but
5670 * for now it just serves as a method for pruning graph lines. */
5671 for (i = 0; i < graph->size; i++)
5672 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5673 return;
5674
5675 if (graph->size < SIZEOF_REVITEMS) {
5676 string_copy_rev(graph->rev[graph->size++], parent);
5677 }
5678 }
5679
5680 static chtype
5681 get_rev_graph_symbol(struct rev_graph *graph)
5682 {
5683 chtype symbol;
5684
5685 if (graph->boundary)
5686 symbol = REVGRAPH_BOUND;
5687 else if (graph->parents->size == 0)
5688 symbol = REVGRAPH_INIT;
5689 else if (graph_parent_is_merge(graph))
5690 symbol = REVGRAPH_MERGE;
5691 else if (graph->pos >= graph->size)
5692 symbol = REVGRAPH_BRANCH;
5693 else
5694 symbol = REVGRAPH_COMMIT;
5695
5696 return symbol;
5697 }
5698
5699 static void
5700 draw_rev_graph(struct rev_graph *graph)
5701 {
5702 struct rev_filler {
5703 chtype separator, line;
5704 };
5705 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
5706 static struct rev_filler fillers[] = {
5707 { ' ', '|' },
5708 { '`', '.' },
5709 { '\'', ' ' },
5710 { '/', ' ' },
5711 };
5712 chtype symbol = get_rev_graph_symbol(graph);
5713 struct rev_filler *filler;
5714 size_t i;
5715
5716 if (opt_line_graphics)
5717 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
5718
5719 filler = &fillers[DEFAULT];
5720
5721 for (i = 0; i < graph->pos; i++) {
5722 append_to_rev_graph(graph, filler->line);
5723 if (graph_parent_is_merge(graph->prev) &&
5724 graph->prev->pos == i)
5725 filler = &fillers[RSHARP];
5726
5727 append_to_rev_graph(graph, filler->separator);
5728 }
5729
5730 /* Place the symbol for this revision. */
5731 append_to_rev_graph(graph, symbol);
5732
5733 if (graph->prev->size > graph->size)
5734 filler = &fillers[RDIAG];
5735 else
5736 filler = &fillers[DEFAULT];
5737
5738 i++;
5739
5740 for (; i < graph->size; i++) {
5741 append_to_rev_graph(graph, filler->separator);
5742 append_to_rev_graph(graph, filler->line);
5743 if (graph_parent_is_merge(graph->prev) &&
5744 i < graph->prev->pos + graph->parents->size)
5745 filler = &fillers[RSHARP];
5746 if (graph->prev->size > graph->size)
5747 filler = &fillers[LDIAG];
5748 }
5749
5750 if (graph->prev->size > graph->size) {
5751 append_to_rev_graph(graph, filler->separator);
5752 if (filler->line != ' ')
5753 append_to_rev_graph(graph, filler->line);
5754 }
5755 }
5756
5757 /* Prepare the next rev graph */
5758 static void
5759 prepare_rev_graph(struct rev_graph *graph)
5760 {
5761 size_t i;
5762
5763 /* First, traverse all lines of revisions up to the active one. */
5764 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5765 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5766 break;
5767
5768 push_rev_graph(graph->next, graph->rev[graph->pos]);
5769 }
5770
5771 /* Interleave the new revision parent(s). */
5772 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5773 push_rev_graph(graph->next, graph->parents->rev[i]);
5774
5775 /* Lastly, put any remaining revisions. */
5776 for (i = graph->pos + 1; i < graph->size; i++)
5777 push_rev_graph(graph->next, graph->rev[i]);
5778 }
5779
5780 static void
5781 update_rev_graph(struct view *view, struct rev_graph *graph)
5782 {
5783 /* If this is the finalizing update ... */
5784 if (graph->commit)
5785 prepare_rev_graph(graph);
5786
5787 /* Graph visualization needs a one rev look-ahead,
5788 * so the first update doesn't visualize anything. */
5789 if (!graph->prev->commit)
5790 return;
5791
5792 if (view->lines > 2)
5793 view->line[view->lines - 3].dirty = 1;
5794 if (view->lines > 1)
5795 view->line[view->lines - 2].dirty = 1;
5796 draw_rev_graph(graph->prev);
5797 done_rev_graph(graph->prev->prev);
5798 }
5799
5800
5801 /*
5802 * Main view backend
5803 */
5804
5805 static const char *main_argv[SIZEOF_ARG] = {
5806 "git", "log", "--no-color", "--pretty=raw", "--parents",
5807 "--topo-order", "%(head)", NULL
5808 };
5809
5810 static bool
5811 main_draw(struct view *view, struct line *line, unsigned int lineno)
5812 {
5813 struct commit *commit = line->data;
5814
5815 if (!*commit->author)
5816 return FALSE;
5817
5818 if (opt_date && draw_date(view, &commit->time))
5819 return TRUE;
5820
5821 if (opt_author && draw_author(view, commit->author))
5822 return TRUE;
5823
5824 if (opt_rev_graph && commit->graph_size &&
5825 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5826 return TRUE;
5827
5828 if (opt_show_refs && commit->refs) {
5829 size_t i = 0;
5830
5831 do {
5832 enum line_type type;
5833
5834 if (commit->refs[i]->head)
5835 type = LINE_MAIN_HEAD;
5836 else if (commit->refs[i]->ltag)
5837 type = LINE_MAIN_LOCAL_TAG;
5838 else if (commit->refs[i]->tag)
5839 type = LINE_MAIN_TAG;
5840 else if (commit->refs[i]->tracked)
5841 type = LINE_MAIN_TRACKED;
5842 else if (commit->refs[i]->remote)
5843 type = LINE_MAIN_REMOTE;
5844 else
5845 type = LINE_MAIN_REF;
5846
5847 if (draw_text(view, type, "[", TRUE) ||
5848 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5849 draw_text(view, type, "]", TRUE))
5850 return TRUE;
5851
5852 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5853 return TRUE;
5854 } while (commit->refs[i++]->next);
5855 }
5856
5857 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5858 return TRUE;
5859 }
5860
5861 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5862 static bool
5863 main_read(struct view *view, char *line)
5864 {
5865 static struct rev_graph *graph = graph_stacks;
5866 enum line_type type;
5867 struct commit *commit;
5868
5869 if (!line) {
5870 int i;
5871
5872 if (!view->lines && !view->parent)
5873 die("No revisions match the given arguments.");
5874 if (view->lines > 0) {
5875 commit = view->line[view->lines - 1].data;
5876 view->line[view->lines - 1].dirty = 1;
5877 if (!*commit->author) {
5878 view->lines--;
5879 free(commit);
5880 graph->commit = NULL;
5881 }
5882 }
5883 update_rev_graph(view, graph);
5884
5885 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5886 clear_rev_graph(&graph_stacks[i]);
5887 return TRUE;
5888 }
5889
5890 type = get_line_type(line);
5891 if (type == LINE_COMMIT) {
5892 commit = calloc(1, sizeof(struct commit));
5893 if (!commit)
5894 return FALSE;
5895
5896 line += STRING_SIZE("commit ");
5897 if (*line == '-') {
5898 graph->boundary = 1;
5899 line++;
5900 }
5901
5902 string_copy_rev(commit->id, line);
5903 commit->refs = get_refs(commit->id);
5904 graph->commit = commit;
5905 add_line_data(view, commit, LINE_MAIN_COMMIT);
5906
5907 while ((line = strchr(line, ' '))) {
5908 line++;
5909 push_rev_graph(graph->parents, line);
5910 commit->has_parents = TRUE;
5911 }
5912 return TRUE;
5913 }
5914
5915 if (!view->lines)
5916 return TRUE;
5917 commit = view->line[view->lines - 1].data;
5918
5919 switch (type) {
5920 case LINE_PARENT:
5921 if (commit->has_parents)
5922 break;
5923 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5924 break;
5925
5926 case LINE_AUTHOR:
5927 parse_author_line(line + STRING_SIZE("author "),
5928 commit->author, sizeof(commit->author),
5929 &commit->time);
5930 update_rev_graph(view, graph);
5931 graph = graph->next;
5932 break;
5933
5934 default:
5935 /* Fill in the commit title if it has not already been set. */
5936 if (commit->title[0])
5937 break;
5938
5939 /* Require titles to start with a non-space character at the
5940 * offset used by git log. */
5941 if (strncmp(line, " ", 4))
5942 break;
5943 line += 4;
5944 /* Well, if the title starts with a whitespace character,
5945 * try to be forgiving. Otherwise we end up with no title. */
5946 while (isspace(*line))
5947 line++;
5948 if (*line == '\0')
5949 break;
5950 /* FIXME: More graceful handling of titles; append "..." to
5951 * shortened titles, etc. */
5952
5953 string_expand(commit->title, sizeof(commit->title), line, 1);
5954 view->line[view->lines - 1].dirty = 1;
5955 }
5956
5957 return TRUE;
5958 }
5959
5960 static enum request
5961 main_request(struct view *view, enum request request, struct line *line)
5962 {
5963 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5964
5965 switch (request) {
5966 case REQ_ENTER:
5967 open_view(view, REQ_VIEW_DIFF, flags);
5968 break;
5969 case REQ_REFRESH:
5970 load_refs();
5971 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5972 break;
5973 default:
5974 return request;
5975 }
5976
5977 return REQ_NONE;
5978 }
5979
5980 static bool
5981 grep_refs(struct ref **refs, regex_t *regex)
5982 {
5983 regmatch_t pmatch;
5984 size_t i = 0;
5985
5986 if (!refs)
5987 return FALSE;
5988 do {
5989 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5990 return TRUE;
5991 } while (refs[i++]->next);
5992
5993 return FALSE;
5994 }
5995
5996 static bool
5997 main_grep(struct view *view, struct line *line)
5998 {
5999 struct commit *commit = line->data;
6000 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
6001 char buf[DATE_COLS + 1];
6002 regmatch_t pmatch;
6003
6004 for (state = S_TITLE; state < S_END; state++) {
6005 char *text;
6006
6007 switch (state) {
6008 case S_TITLE: text = commit->title; break;
6009 case S_AUTHOR:
6010 if (!opt_author)
6011 continue;
6012 text = commit->author;
6013 break;
6014 case S_DATE:
6015 if (!opt_date)
6016 continue;
6017 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
6018 continue;
6019 text = buf;
6020 break;
6021 case S_REFS:
6022 if (!opt_show_refs)
6023 continue;
6024 if (grep_refs(commit->refs, view->regex) == TRUE)
6025 return TRUE;
6026 continue;
6027 default:
6028 return FALSE;
6029 }
6030
6031 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
6032 return TRUE;
6033 }
6034
6035 return FALSE;
6036 }
6037
6038 static void
6039 main_select(struct view *view, struct line *line)
6040 {
6041 struct commit *commit = line->data;
6042
6043 string_copy_rev(view->ref, commit->id);
6044 string_copy_rev(ref_commit, view->ref);
6045 }
6046
6047 static struct view_ops main_ops = {
6048 "commit",
6049 main_argv,
6050 NULL,
6051 main_read,
6052 main_draw,
6053 main_request,
6054 main_grep,
6055 main_select,
6056 };
6057
6058
6059 /*
6060 * Unicode / UTF-8 handling
6061 *
6062 * NOTE: Much of the following code for dealing with Unicode is derived from
6063 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
6064 * src/intl/charset.c from the UTF-8 branch commit elinks-0.11.0-g31f2c28.
6065 */
6066
6067 static inline int
6068 unicode_width(unsigned long c)
6069 {
6070 if (c >= 0x1100 &&
6071 (c <= 0x115f /* Hangul Jamo */
6072 || c == 0x2329
6073 || c == 0x232a
6074 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
6075 /* CJK ... Yi */
6076 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
6077 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
6078 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
6079 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
6080 || (c >= 0xffe0 && c <= 0xffe6)
6081 || (c >= 0x20000 && c <= 0x2fffd)
6082 || (c >= 0x30000 && c <= 0x3fffd)))
6083 return 2;
6084
6085 if (c == '\t')
6086 return opt_tab_size;
6087
6088 return 1;
6089 }
6090
6091 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
6092 * Illegal bytes are set one. */
6093 static const unsigned char utf8_bytes[256] = {
6094 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,
6095 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,
6096 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,
6097 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,
6098 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,
6099 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,
6100 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,
6101 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,
6102 };
6103
6104 /* Decode UTF-8 multi-byte representation into a Unicode character. */
6105 static inline unsigned long
6106 utf8_to_unicode(const char *string, size_t length)
6107 {
6108 unsigned long unicode;
6109
6110 switch (length) {
6111 case 1:
6112 unicode = string[0];
6113 break;
6114 case 2:
6115 unicode = (string[0] & 0x1f) << 6;
6116 unicode += (string[1] & 0x3f);
6117 break;
6118 case 3:
6119 unicode = (string[0] & 0x0f) << 12;
6120 unicode += ((string[1] & 0x3f) << 6);
6121 unicode += (string[2] & 0x3f);
6122 break;
6123 case 4:
6124 unicode = (string[0] & 0x0f) << 18;
6125 unicode += ((string[1] & 0x3f) << 12);
6126 unicode += ((string[2] & 0x3f) << 6);
6127 unicode += (string[3] & 0x3f);
6128 break;
6129 case 5:
6130 unicode = (string[0] & 0x0f) << 24;
6131 unicode += ((string[1] & 0x3f) << 18);
6132 unicode += ((string[2] & 0x3f) << 12);
6133 unicode += ((string[3] & 0x3f) << 6);
6134 unicode += (string[4] & 0x3f);
6135 break;
6136 case 6:
6137 unicode = (string[0] & 0x01) << 30;
6138 unicode += ((string[1] & 0x3f) << 24);
6139 unicode += ((string[2] & 0x3f) << 18);
6140 unicode += ((string[3] & 0x3f) << 12);
6141 unicode += ((string[4] & 0x3f) << 6);
6142 unicode += (string[5] & 0x3f);
6143 break;
6144 default:
6145 die("Invalid Unicode length");
6146 }
6147
6148 /* Invalid characters could return the special 0xfffd value but NUL
6149 * should be just as good. */
6150 return unicode > 0xffff ? 0 : unicode;
6151 }
6152
6153 /* Calculates how much of string can be shown within the given maximum width
6154 * and sets trimmed parameter to non-zero value if all of string could not be
6155 * shown. If the reserve flag is TRUE, it will reserve at least one
6156 * trailing character, which can be useful when drawing a delimiter.
6157 *
6158 * Returns the number of bytes to output from string to satisfy max_width. */
6159 static size_t
6160 utf8_length(const char **start, size_t skip, int *width, size_t max_width, int *trimmed, bool reserve)
6161 {
6162 const char *string = *start;
6163 const char *end = strchr(string, '\0');
6164 unsigned char last_bytes = 0;
6165 size_t last_ucwidth = 0;
6166
6167 *width = 0;
6168 *trimmed = 0;
6169
6170 while (string < end) {
6171 int c = *(unsigned char *) string;
6172 unsigned char bytes = utf8_bytes[c];
6173 size_t ucwidth;
6174 unsigned long unicode;
6175
6176 if (string + bytes > end)
6177 break;
6178
6179 /* Change representation to figure out whether
6180 * it is a single- or double-width character. */
6181
6182 unicode = utf8_to_unicode(string, bytes);
6183 /* FIXME: Graceful handling of invalid Unicode character. */
6184 if (!unicode)
6185 break;
6186
6187 ucwidth = unicode_width(unicode);
6188 if (skip > 0) {
6189 skip -= ucwidth <= skip ? ucwidth : skip;
6190 *start += bytes;
6191 }
6192 *width += ucwidth;
6193 if (*width > max_width) {
6194 *trimmed = 1;
6195 *width -= ucwidth;
6196 if (reserve && *width == max_width) {
6197 string -= last_bytes;
6198 *width -= last_ucwidth;
6199 }
6200 break;
6201 }
6202
6203 string += bytes;
6204 last_bytes = ucwidth ? bytes : 0;
6205 last_ucwidth = ucwidth;
6206 }
6207
6208 return string - *start;
6209 }
6210
6211
6212 /*
6213 * Status management
6214 */
6215
6216 /* Whether or not the curses interface has been initialized. */
6217 static bool cursed = FALSE;
6218
6219 /* Terminal hacks and workarounds. */
6220 static bool use_scroll_redrawwin;
6221 static bool use_scroll_status_wclear;
6222
6223 /* The status window is used for polling keystrokes. */
6224 static WINDOW *status_win;
6225
6226 /* Reading from the prompt? */
6227 static bool input_mode = FALSE;
6228
6229 static bool status_empty = FALSE;
6230
6231 /* Update status and title window. */
6232 static void
6233 report(const char *msg, ...)
6234 {
6235 struct view *view = display[current_view];
6236
6237 if (input_mode)
6238 return;
6239
6240 if (!view) {
6241 char buf[SIZEOF_STR];
6242 va_list args;
6243
6244 va_start(args, msg);
6245 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6246 buf[sizeof(buf) - 1] = 0;
6247 buf[sizeof(buf) - 2] = '.';
6248 buf[sizeof(buf) - 3] = '.';
6249 buf[sizeof(buf) - 4] = '.';
6250 }
6251 va_end(args);
6252 die("%s", buf);
6253 }
6254
6255 if (!status_empty || *msg) {
6256 va_list args;
6257
6258 va_start(args, msg);
6259
6260 wmove(status_win, 0, 0);
6261 if (view->has_scrolled && use_scroll_status_wclear)
6262 wclear(status_win);
6263 if (*msg) {
6264 vwprintw(status_win, msg, args);
6265 status_empty = FALSE;
6266 } else {
6267 status_empty = TRUE;
6268 }
6269 wclrtoeol(status_win);
6270 wnoutrefresh(status_win);
6271
6272 va_end(args);
6273 }
6274
6275 update_view_title(view);
6276 }
6277
6278 /* Controls when nodelay should be in effect when polling user input. */
6279 static void
6280 set_nonblocking_input(bool loading)
6281 {
6282 static unsigned int loading_views;
6283
6284 if ((loading == FALSE && loading_views-- == 1) ||
6285 (loading == TRUE && loading_views++ == 0))
6286 nodelay(status_win, loading);
6287 }
6288
6289 static void
6290 init_display(void)
6291 {
6292 const char *term;
6293 int x, y;
6294
6295 /* Initialize the curses library */
6296 if (isatty(STDIN_FILENO)) {
6297 cursed = !!initscr();
6298 opt_tty = stdin;
6299 } else {
6300 /* Leave stdin and stdout alone when acting as a pager. */
6301 opt_tty = fopen("/dev/tty", "r+");
6302 if (!opt_tty)
6303 die("Failed to open /dev/tty");
6304 cursed = !!newterm(NULL, opt_tty, opt_tty);
6305 }
6306
6307 if (!cursed)
6308 die("Failed to initialize curses");
6309
6310 nonl(); /* Disable conversion and detect newlines from input. */
6311 cbreak(); /* Take input chars one at a time, no wait for \n */
6312 noecho(); /* Don't echo input */
6313 leaveok(stdscr, FALSE);
6314
6315 if (has_colors())
6316 init_colors();
6317
6318 getmaxyx(stdscr, y, x);
6319 status_win = newwin(1, 0, y - 1, 0);
6320 if (!status_win)
6321 die("Failed to create status window");
6322
6323 /* Enable keyboard mapping */
6324 keypad(status_win, TRUE);
6325 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6326
6327 TABSIZE = opt_tab_size;
6328 if (opt_line_graphics) {
6329 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
6330 }
6331
6332 term = getenv("XTERM_VERSION") ? NULL : getenv("COLORTERM");
6333 if (term && !strcmp(term, "gnome-terminal")) {
6334 /* In the gnome-terminal-emulator, the message from
6335 * scrolling up one line when impossible followed by
6336 * scrolling down one line causes corruption of the
6337 * status line. This is fixed by calling wclear. */
6338 use_scroll_status_wclear = TRUE;
6339 use_scroll_redrawwin = FALSE;
6340
6341 } else if (term && !strcmp(term, "xrvt-xpm")) {
6342 /* No problems with full optimizations in xrvt-(unicode)
6343 * and aterm. */
6344 use_scroll_status_wclear = use_scroll_redrawwin = FALSE;
6345
6346 } else {
6347 /* When scrolling in (u)xterm the last line in the
6348 * scrolling direction will update slowly. */
6349 use_scroll_redrawwin = TRUE;
6350 use_scroll_status_wclear = FALSE;
6351 }
6352 }
6353
6354 static int
6355 get_input(int prompt_position)
6356 {
6357 struct view *view;
6358 int i, key, cursor_y, cursor_x;
6359
6360 if (prompt_position)
6361 input_mode = TRUE;
6362
6363 while (TRUE) {
6364 foreach_view (view, i) {
6365 update_view(view);
6366 if (view_is_displayed(view) && view->has_scrolled &&
6367 use_scroll_redrawwin)
6368 redrawwin(view->win);
6369 view->has_scrolled = FALSE;
6370 }
6371
6372 /* Update the cursor position. */
6373 if (prompt_position) {
6374 getbegyx(status_win, cursor_y, cursor_x);
6375 cursor_x = prompt_position;
6376 } else {
6377 view = display[current_view];
6378 getbegyx(view->win, cursor_y, cursor_x);
6379 cursor_x = view->width - 1;
6380 cursor_y += view->lineno - view->offset;
6381 }
6382 setsyx(cursor_y, cursor_x);
6383
6384 /* Refresh, accept single keystroke of input */
6385 doupdate();
6386 key = wgetch(status_win);
6387
6388 /* wgetch() with nodelay() enabled returns ERR when
6389 * there's no input. */
6390 if (key == ERR) {
6391
6392 } else if (key == KEY_RESIZE) {
6393 int height, width;
6394
6395 getmaxyx(stdscr, height, width);
6396
6397 wresize(status_win, 1, width);
6398 mvwin(status_win, height - 1, 0);
6399 wnoutrefresh(status_win);
6400 resize_display();
6401 redraw_display(TRUE);
6402
6403 } else {
6404 input_mode = FALSE;
6405 return key;
6406 }
6407 }
6408 }
6409
6410 static char *
6411 prompt_input(const char *prompt, input_handler handler, void *data)
6412 {
6413 enum input_status status = INPUT_OK;
6414 static char buf[SIZEOF_STR];
6415 size_t pos = 0;
6416
6417 buf[pos] = 0;
6418
6419 while (status == INPUT_OK || status == INPUT_SKIP) {
6420 int key;
6421
6422 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6423 wclrtoeol(status_win);
6424
6425 key = get_input(pos + 1);
6426 switch (key) {
6427 case KEY_RETURN:
6428 case KEY_ENTER:
6429 case '\n':
6430 status = pos ? INPUT_STOP : INPUT_CANCEL;
6431 break;
6432
6433 case KEY_BACKSPACE:
6434 if (pos > 0)
6435 buf[--pos] = 0;
6436 else
6437 status = INPUT_CANCEL;
6438 break;
6439
6440 case KEY_ESC:
6441 status = INPUT_CANCEL;
6442 break;
6443
6444 default:
6445 if (pos >= sizeof(buf)) {
6446 report("Input string too long");
6447 return NULL;
6448 }
6449
6450 status = handler(data, buf, key);
6451 if (status == INPUT_OK)
6452 buf[pos++] = (char) key;
6453 }
6454 }
6455
6456 /* Clear the status window */
6457 status_empty = FALSE;
6458 report("");
6459
6460 if (status == INPUT_CANCEL)
6461 return NULL;
6462
6463 buf[pos++] = 0;
6464
6465 return buf;
6466 }
6467
6468 static enum input_status
6469 prompt_yesno_handler(void *data, char *buf, int c)
6470 {
6471 if (c == 'y' || c == 'Y')
6472 return INPUT_STOP;
6473 if (c == 'n' || c == 'N')
6474 return INPUT_CANCEL;
6475 return INPUT_SKIP;
6476 }
6477
6478 static bool
6479 prompt_yesno(const char *prompt)
6480 {
6481 char prompt2[SIZEOF_STR];
6482
6483 if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6484 return FALSE;
6485
6486 return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6487 }
6488
6489 static enum input_status
6490 read_prompt_handler(void *data, char *buf, int c)
6491 {
6492 return isprint(c) ? INPUT_OK : INPUT_SKIP;
6493 }
6494
6495 static char *
6496 read_prompt(const char *prompt)
6497 {
6498 return prompt_input(prompt, read_prompt_handler, NULL);
6499 }
6500
6501 /*
6502 * Repository properties
6503 */
6504
6505 static struct ref *refs = NULL;
6506 static size_t refs_alloc = 0;
6507 static size_t refs_size = 0;
6508
6509 /* Id <-> ref store */
6510 static struct ref ***id_refs = NULL;
6511 static size_t id_refs_alloc = 0;
6512 static size_t id_refs_size = 0;
6513
6514 static int
6515 compare_refs(const void *ref1_, const void *ref2_)
6516 {
6517 const struct ref *ref1 = *(const struct ref **)ref1_;
6518 const struct ref *ref2 = *(const struct ref **)ref2_;
6519
6520 if (ref1->tag != ref2->tag)
6521 return ref2->tag - ref1->tag;
6522 if (ref1->ltag != ref2->ltag)
6523 return ref2->ltag - ref2->ltag;
6524 if (ref1->head != ref2->head)
6525 return ref2->head - ref1->head;
6526 if (ref1->tracked != ref2->tracked)
6527 return ref2->tracked - ref1->tracked;
6528 if (ref1->remote != ref2->remote)
6529 return ref2->remote - ref1->remote;
6530 return strcmp(ref1->name, ref2->name);
6531 }
6532
6533 static struct ref **
6534 get_refs(const char *id)
6535 {
6536 struct ref ***tmp_id_refs;
6537 struct ref **ref_list = NULL;
6538 size_t ref_list_alloc = 0;
6539 size_t ref_list_size = 0;
6540 size_t i;
6541
6542 for (i = 0; i < id_refs_size; i++)
6543 if (!strcmp(id, id_refs[i][0]->id))
6544 return id_refs[i];
6545
6546 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
6547 sizeof(*id_refs));
6548 if (!tmp_id_refs)
6549 return NULL;
6550
6551 id_refs = tmp_id_refs;
6552
6553 for (i = 0; i < refs_size; i++) {
6554 struct ref **tmp;
6555
6556 if (strcmp(id, refs[i].id))
6557 continue;
6558
6559 tmp = realloc_items(ref_list, &ref_list_alloc,
6560 ref_list_size + 1, sizeof(*ref_list));
6561 if (!tmp) {
6562 if (ref_list)
6563 free(ref_list);
6564 return NULL;
6565 }
6566
6567 ref_list = tmp;
6568 ref_list[ref_list_size] = &refs[i];
6569 /* XXX: The properties of the commit chains ensures that we can
6570 * safely modify the shared ref. The repo references will
6571 * always be similar for the same id. */
6572 ref_list[ref_list_size]->next = 1;
6573
6574 ref_list_size++;
6575 }
6576
6577 if (ref_list) {
6578 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
6579 ref_list[ref_list_size - 1]->next = 0;
6580 id_refs[id_refs_size++] = ref_list;
6581 }
6582
6583 return ref_list;
6584 }
6585
6586 static int
6587 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6588 {
6589 struct ref *ref;
6590 bool tag = FALSE;
6591 bool ltag = FALSE;
6592 bool remote = FALSE;
6593 bool tracked = FALSE;
6594 bool check_replace = FALSE;
6595 bool head = FALSE;
6596
6597 if (!prefixcmp(name, "refs/tags/")) {
6598 if (!suffixcmp(name, namelen, "^{}")) {
6599 namelen -= 3;
6600 name[namelen] = 0;
6601 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
6602 check_replace = TRUE;
6603 } else {
6604 ltag = TRUE;
6605 }
6606
6607 tag = TRUE;
6608 namelen -= STRING_SIZE("refs/tags/");
6609 name += STRING_SIZE("refs/tags/");
6610
6611 } else if (!prefixcmp(name, "refs/remotes/")) {
6612 remote = TRUE;
6613 namelen -= STRING_SIZE("refs/remotes/");
6614 name += STRING_SIZE("refs/remotes/");
6615 tracked = !strcmp(opt_remote, name);
6616
6617 } else if (!prefixcmp(name, "refs/heads/")) {
6618 namelen -= STRING_SIZE("refs/heads/");
6619 name += STRING_SIZE("refs/heads/");
6620 head = !strncmp(opt_head, name, namelen);
6621
6622 } else if (!strcmp(name, "HEAD")) {
6623 string_ncopy(opt_head_rev, id, idlen);
6624 return OK;
6625 }
6626
6627 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
6628 /* it's an annotated tag, replace the previous SHA1 with the
6629 * resolved commit id; relies on the fact git-ls-remote lists
6630 * the commit id of an annotated tag right before the commit id
6631 * it points to. */
6632 refs[refs_size - 1].ltag = ltag;
6633 string_copy_rev(refs[refs_size - 1].id, id);
6634
6635 return OK;
6636 }
6637 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
6638 if (!refs)
6639 return ERR;
6640
6641 ref = &refs[refs_size++];
6642 ref->name = malloc(namelen + 1);
6643 if (!ref->name)
6644 return ERR;
6645
6646 strncpy(ref->name, name, namelen);
6647 ref->name[namelen] = 0;
6648 ref->head = head;
6649 ref->tag = tag;
6650 ref->ltag = ltag;
6651 ref->remote = remote;
6652 ref->tracked = tracked;
6653 string_copy_rev(ref->id, id);
6654
6655 return OK;
6656 }
6657
6658 static int
6659 load_refs(void)
6660 {
6661 static const char *ls_remote_argv[SIZEOF_ARG] = {
6662 "git", "ls-remote", ".", NULL
6663 };
6664 static bool init = FALSE;
6665
6666 if (!init) {
6667 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6668 init = TRUE;
6669 }
6670
6671 if (!*opt_git_dir)
6672 return OK;
6673
6674 while (refs_size > 0)
6675 free(refs[--refs_size].name);
6676 while (id_refs_size > 0)
6677 free(id_refs[--id_refs_size]);
6678
6679 return run_io_load(ls_remote_argv, "\t", read_ref);
6680 }
6681
6682 static void
6683 set_repo_config_option(char *name, char *value, int (*cmd)(int, const char **))
6684 {
6685 const char *argv[SIZEOF_ARG] = { name, "=" };
6686 int argc = 1 + (cmd == option_set_command);
6687 int error = ERR;
6688
6689 if (!argv_from_string(argv, &argc, value))
6690 config_msg = "Too many option arguments";
6691 else
6692 error = cmd(argc, argv);
6693
6694 if (error == ERR)
6695 warn("Option 'tig.%s': %s", name, config_msg);
6696 }
6697
6698 static int
6699 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
6700 {
6701 if (!strcmp(name, "i18n.commitencoding"))
6702 string_ncopy(opt_encoding, value, valuelen);
6703
6704 if (!strcmp(name, "core.editor"))
6705 string_ncopy(opt_editor, value, valuelen);
6706
6707 if (!prefixcmp(name, "tig.color."))
6708 set_repo_config_option(name + 10, value, option_color_command);
6709
6710 else if (!prefixcmp(name, "tig.bind."))
6711 set_repo_config_option(name + 9, value, option_bind_command);
6712
6713 else if (!prefixcmp(name, "tig."))
6714 set_repo_config_option(name + 4, value, option_set_command);
6715
6716 /* branch.<head>.remote */
6717 if (*opt_head &&
6718 !strncmp(name, "branch.", 7) &&
6719 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6720 !strcmp(name + 7 + strlen(opt_head), ".remote"))
6721 string_ncopy(opt_remote, value, valuelen);
6722
6723 if (*opt_head && *opt_remote &&
6724 !strncmp(name, "branch.", 7) &&
6725 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6726 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
6727 size_t from = strlen(opt_remote);
6728
6729 if (!prefixcmp(value, "refs/heads/")) {
6730 value += STRING_SIZE("refs/heads/");
6731 valuelen -= STRING_SIZE("refs/heads/");
6732 }
6733
6734 if (!string_format_from(opt_remote, &from, "/%s", value))
6735 opt_remote[0] = 0;
6736 }
6737
6738 return OK;
6739 }
6740
6741 static int
6742 load_git_config(void)
6743 {
6744 const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
6745
6746 return run_io_load(config_list_argv, "=", read_repo_config_option);
6747 }
6748
6749 static int
6750 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
6751 {
6752 if (!opt_git_dir[0]) {
6753 string_ncopy(opt_git_dir, name, namelen);
6754
6755 } else if (opt_is_inside_work_tree == -1) {
6756 /* This can be 3 different values depending on the
6757 * version of git being used. If git-rev-parse does not
6758 * understand --is-inside-work-tree it will simply echo
6759 * the option else either "true" or "false" is printed.
6760 * Default to true for the unknown case. */
6761 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6762
6763 } else if (*name == '.') {
6764 string_ncopy(opt_cdup, name, namelen);
6765
6766 } else {
6767 string_ncopy(opt_prefix, name, namelen);
6768 }
6769
6770 return OK;
6771 }
6772
6773 static int
6774 load_repo_info(void)
6775 {
6776 const char *head_argv[] = {
6777 "git", "symbolic-ref", "HEAD", NULL
6778 };
6779 const char *rev_parse_argv[] = {
6780 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6781 "--show-cdup", "--show-prefix", NULL
6782 };
6783
6784 if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
6785 chomp_string(opt_head);
6786 if (!prefixcmp(opt_head, "refs/heads/")) {
6787 char *offset = opt_head + STRING_SIZE("refs/heads/");
6788
6789 memmove(opt_head, offset, strlen(offset) + 1);
6790 }
6791 }
6792
6793 return run_io_load(rev_parse_argv, "=", read_repo_info);
6794 }
6795
6796
6797 /*
6798 * Main
6799 */
6800
6801 static const char usage[] =
6802 "tig " TIG_VERSION " (" __DATE__ ")\n"
6803 "\n"
6804 "Usage: tig [options] [revs] [--] [paths]\n"
6805 " or: tig show [options] [revs] [--] [paths]\n"
6806 " or: tig blame [rev] path\n"
6807 " or: tig status\n"
6808 " or: tig < [git command output]\n"
6809 "\n"
6810 "Options:\n"
6811 " -v, --version Show version and exit\n"
6812 " -h, --help Show help message and exit";
6813
6814 static void __NORETURN
6815 quit(int sig)
6816 {
6817 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6818 if (cursed)
6819 endwin();
6820 exit(0);
6821 }
6822
6823 static void __NORETURN
6824 die(const char *err, ...)
6825 {
6826 va_list args;
6827
6828 endwin();
6829
6830 va_start(args, err);
6831 fputs("tig: ", stderr);
6832 vfprintf(stderr, err, args);
6833 fputs("\n", stderr);
6834 va_end(args);
6835
6836 exit(1);
6837 }
6838
6839 static void
6840 warn(const char *msg, ...)
6841 {
6842 va_list args;
6843
6844 va_start(args, msg);
6845 fputs("tig warning: ", stderr);
6846 vfprintf(stderr, msg, args);
6847 fputs("\n", stderr);
6848 va_end(args);
6849 }
6850
6851 static enum request
6852 parse_options(int argc, const char *argv[])
6853 {
6854 enum request request = REQ_VIEW_MAIN;
6855 const char *subcommand;
6856 bool seen_dashdash = FALSE;
6857 /* XXX: This is vulnerable to the user overriding options
6858 * required for the main view parser. */
6859 const char *custom_argv[SIZEOF_ARG] = {
6860 "git", "log", "--no-color", "--pretty=raw", "--parents",
6861 "--topo-order", NULL
6862 };
6863 int i, j = 6;
6864
6865 if (!isatty(STDIN_FILENO)) {
6866 io_open(&VIEW(REQ_VIEW_PAGER)->io, "");
6867 return REQ_VIEW_PAGER;
6868 }
6869
6870 if (argc <= 1)
6871 return REQ_NONE;
6872
6873 subcommand = argv[1];
6874 if (!strcmp(subcommand, "status")) {
6875 if (argc > 2)
6876 warn("ignoring arguments after `%s'", subcommand);
6877 return REQ_VIEW_STATUS;
6878
6879 } else if (!strcmp(subcommand, "blame")) {
6880 if (argc <= 2 || argc > 4)
6881 die("invalid number of options to blame\n\n%s", usage);
6882
6883 i = 2;
6884 if (argc == 4) {
6885 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
6886 i++;
6887 }
6888
6889 string_ncopy(opt_file, argv[i], strlen(argv[i]));
6890 return REQ_VIEW_BLAME;
6891
6892 } else if (!strcmp(subcommand, "show")) {
6893 request = REQ_VIEW_DIFF;
6894
6895 } else {
6896 subcommand = NULL;
6897 }
6898
6899 if (subcommand) {
6900 custom_argv[1] = subcommand;
6901 j = 2;
6902 }
6903
6904 for (i = 1 + !!subcommand; i < argc; i++) {
6905 const char *opt = argv[i];
6906
6907 if (seen_dashdash || !strcmp(opt, "--")) {
6908 seen_dashdash = TRUE;
6909
6910 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
6911 printf("tig version %s\n", TIG_VERSION);
6912 quit(0);
6913
6914 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
6915 printf("%s\n", usage);
6916 quit(0);
6917 }
6918
6919 custom_argv[j++] = opt;
6920 if (j >= ARRAY_SIZE(custom_argv))
6921 die("command too long");
6922 }
6923
6924 if (!prepare_update(VIEW(request), custom_argv, NULL, FORMAT_NONE))
6925 die("Failed to format arguments");
6926
6927 return request;
6928 }
6929
6930 int
6931 main(int argc, const char *argv[])
6932 {
6933 enum request request = parse_options(argc, argv);
6934 struct view *view;
6935 size_t i;
6936
6937 signal(SIGINT, quit);
6938
6939 if (setlocale(LC_ALL, "")) {
6940 char *codeset = nl_langinfo(CODESET);
6941
6942 string_ncopy(opt_codeset, codeset, strlen(codeset));
6943 }
6944
6945 if (load_repo_info() == ERR)
6946 die("Failed to load repo info.");
6947
6948 if (load_options() == ERR)
6949 die("Failed to load user config.");
6950
6951 if (load_git_config() == ERR)
6952 die("Failed to load repo config.");
6953
6954 /* Require a git repository unless when running in pager mode. */
6955 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6956 die("Not a git repository");
6957
6958 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6959 opt_utf8 = FALSE;
6960
6961 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6962 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6963 if (opt_iconv == ICONV_NONE)
6964 die("Failed to initialize character set conversion");
6965 }
6966
6967 if (load_refs() == ERR)
6968 die("Failed to load refs.");
6969
6970 foreach_view (view, i)
6971 argv_from_env(view->ops->argv, view->cmd_env);
6972
6973 init_display();
6974
6975 if (request != REQ_NONE)
6976 open_view(NULL, request, OPEN_PREPARED);
6977 request = request == REQ_NONE ? REQ_VIEW_MAIN : REQ_NONE;
6978
6979 while (view_driver(display[current_view], request)) {
6980 int key = get_input(0);
6981
6982 view = display[current_view];
6983 request = get_keybinding(view->keymap, key);
6984
6985 /* Some low-level request handling. This keeps access to
6986 * status_win restricted. */
6987 switch (request) {
6988 case REQ_PROMPT:
6989 {
6990 char *cmd = read_prompt(":");
6991
6992 if (cmd && isdigit(*cmd)) {
6993 int lineno = view->lineno + 1;
6994
6995 if (parse_int(&lineno, cmd, 1, view->lines + 1) == OK) {
6996 select_view_line(view, lineno - 1);
6997 report("");
6998 } else {
6999 report("Unable to parse '%s' as a line number", cmd);
7000 }
7001
7002 } else if (cmd) {
7003 struct view *next = VIEW(REQ_VIEW_PAGER);
7004 const char *argv[SIZEOF_ARG] = { "git" };
7005 int argc = 1;
7006
7007 /* When running random commands, initially show the
7008 * command in the title. However, it maybe later be
7009 * overwritten if a commit line is selected. */
7010 string_ncopy(next->ref, cmd, strlen(cmd));
7011
7012 if (!argv_from_string(argv, &argc, cmd)) {
7013 report("Too many arguments");
7014 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
7015 report("Failed to format command");
7016 } else {
7017 open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
7018 }
7019 }
7020
7021 request = REQ_NONE;
7022 break;
7023 }
7024 case REQ_SEARCH:
7025 case REQ_SEARCH_BACK:
7026 {
7027 const char *prompt = request == REQ_SEARCH ? "/" : "?";
7028 char *search = read_prompt(prompt);
7029
7030 if (search)
7031 string_ncopy(opt_search, search, strlen(search));
7032 else if (*opt_search)
7033 request = request == REQ_SEARCH ?
7034 REQ_FIND_NEXT :
7035 REQ_FIND_PREV;
7036 else
7037 request = REQ_NONE;
7038 break;
7039 }
7040 default:
7041 break;
7042 }
7043 }
7044
7045 quit(0);
7046
7047 return 0;
7048 }
Text-mode interface for git