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Handle all cursor positioning in get_input
[tig.git] / tig.c
blobc20a9d4f9b833a3f7d2c796ac5b4c3d591b42823
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 size_t utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve);
72 static int load_refs(void);
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
113 #define TAB_SIZE 8
114
115 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
116
117 #define NULL_ID "0000000000000000000000000000000000000000"
118
119 #ifndef GIT_CONFIG
120 #define GIT_CONFIG "config"
121 #endif
122
123 /* Some ascii-shorthands fitted into the ncurses namespace. */
124 #define KEY_TAB '\t'
125 #define KEY_RETURN '\r'
126 #define KEY_ESC 27
127
128
129 struct ref {
130 char *name; /* Ref name; tag or head names are shortened. */
131 char id[SIZEOF_REV]; /* Commit SHA1 ID */
132 unsigned int head:1; /* Is it the current HEAD? */
133 unsigned int tag:1; /* Is it a tag? */
134 unsigned int ltag:1; /* If so, is the tag local? */
135 unsigned int remote:1; /* Is it a remote ref? */
136 unsigned int tracked:1; /* Is it the remote for the current HEAD? */
137 unsigned int next:1; /* For ref lists: are there more refs? */
138 };
139
140 static struct ref **get_refs(const char *id);
141
142 enum format_flags {
143 FORMAT_ALL, /* Perform replacement in all arguments. */
144 FORMAT_DASH, /* Perform replacement up until "--". */
145 FORMAT_NONE /* No replacement should be performed. */
146 };
147
148 static bool format_argv(const char *dst[], const char *src[], enum format_flags flags);
149
150 struct int_map {
151 const char *name;
152 int namelen;
153 int value;
154 };
155
156 static int
157 set_from_int_map(struct int_map *map, size_t map_size,
158 int *value, const char *name, int namelen)
159 {
160
161 int i;
162
163 for (i = 0; i < map_size; i++)
164 if (namelen == map[i].namelen &&
165 !strncasecmp(name, map[i].name, namelen)) {
166 *value = map[i].value;
167 return OK;
168 }
169
170 return ERR;
171 }
172
173 enum input_status {
174 INPUT_OK,
175 INPUT_SKIP,
176 INPUT_STOP,
177 INPUT_CANCEL
178 };
179
180 typedef enum input_status (*input_handler)(void *data, char *buf, int c);
181
182 static char *prompt_input(const char *prompt, input_handler handler, void *data);
183 static bool prompt_yesno(const char *prompt);
184
185 /*
186 * String helpers
187 */
188
189 static inline void
190 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
191 {
192 if (srclen > dstlen - 1)
193 srclen = dstlen - 1;
194
195 strncpy(dst, src, srclen);
196 dst[srclen] = 0;
197 }
198
199 /* Shorthands for safely copying into a fixed buffer. */
200
201 #define string_copy(dst, src) \
202 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
203
204 #define string_ncopy(dst, src, srclen) \
205 string_ncopy_do(dst, sizeof(dst), src, srclen)
206
207 #define string_copy_rev(dst, src) \
208 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
209
210 #define string_add(dst, from, src) \
211 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
212
213 static char *
214 chomp_string(char *name)
215 {
216 int namelen;
217
218 while (isspace(*name))
219 name++;
220
221 namelen = strlen(name) - 1;
222 while (namelen > 0 && isspace(name[namelen]))
223 name[namelen--] = 0;
224
225 return name;
226 }
227
228 static bool
229 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
230 {
231 va_list args;
232 size_t pos = bufpos ? *bufpos : 0;
233
234 va_start(args, fmt);
235 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
236 va_end(args);
237
238 if (bufpos)
239 *bufpos = pos;
240
241 return pos >= bufsize ? FALSE : TRUE;
242 }
243
244 #define string_format(buf, fmt, args...) \
245 string_nformat(buf, sizeof(buf), NULL, fmt, args)
246
247 #define string_format_from(buf, from, fmt, args...) \
248 string_nformat(buf, sizeof(buf), from, fmt, args)
249
250 static int
251 string_enum_compare(const char *str1, const char *str2, int len)
252 {
253 size_t i;
254
255 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
256
257 /* Diff-Header == DIFF_HEADER */
258 for (i = 0; i < len; i++) {
259 if (toupper(str1[i]) == toupper(str2[i]))
260 continue;
261
262 if (string_enum_sep(str1[i]) &&
263 string_enum_sep(str2[i]))
264 continue;
265
266 return str1[i] - str2[i];
267 }
268
269 return 0;
270 }
271
272 #define prefixcmp(str1, str2) \
273 strncmp(str1, str2, STRING_SIZE(str2))
274
275 static inline int
276 suffixcmp(const char *str, int slen, const char *suffix)
277 {
278 size_t len = slen >= 0 ? slen : strlen(str);
279 size_t suffixlen = strlen(suffix);
280
281 return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
282 }
283
284
285 static bool
286 argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
287 {
288 int valuelen;
289
290 while (*cmd && *argc < SIZEOF_ARG && (valuelen = strcspn(cmd, " \t"))) {
291 bool advance = cmd[valuelen] != 0;
292
293 cmd[valuelen] = 0;
294 argv[(*argc)++] = chomp_string(cmd);
295 cmd = chomp_string(cmd + valuelen + advance);
296 }
297
298 if (*argc < SIZEOF_ARG)
299 argv[*argc] = NULL;
300 return *argc < SIZEOF_ARG;
301 }
302
303 static void
304 argv_from_env(const char **argv, const char *name)
305 {
306 char *env = argv ? getenv(name) : NULL;
307 int argc = 0;
308
309 if (env && *env)
310 env = strdup(env);
311 if (env && !argv_from_string(argv, &argc, env))
312 die("Too many arguments in the `%s` environment variable", name);
313 }
314
315
316 /*
317 * Executing external commands.
318 */
319
320 enum io_type {
321 IO_FD, /* File descriptor based IO. */
322 IO_BG, /* Execute command in the background. */
323 IO_FG, /* Execute command with same std{in,out,err}. */
324 IO_RD, /* Read only fork+exec IO. */
325 IO_WR, /* Write only fork+exec IO. */
326 IO_AP, /* Append fork+exec output to file. */
327 };
328
329 struct io {
330 enum io_type type; /* The requested type of pipe. */
331 const char *dir; /* Directory from which to execute. */
332 pid_t pid; /* Pipe for reading or writing. */
333 int pipe; /* Pipe end for reading or writing. */
334 int error; /* Error status. */
335 const char *argv[SIZEOF_ARG]; /* Shell command arguments. */
336 char *buf; /* Read buffer. */
337 size_t bufalloc; /* Allocated buffer size. */
338 size_t bufsize; /* Buffer content size. */
339 char *bufpos; /* Current buffer position. */
340 unsigned int eof:1; /* Has end of file been reached. */
341 };
342
343 static void
344 reset_io(struct io *io)
345 {
346 io->pipe = -1;
347 io->pid = 0;
348 io->buf = io->bufpos = NULL;
349 io->bufalloc = io->bufsize = 0;
350 io->error = 0;
351 io->eof = 0;
352 }
353
354 static void
355 init_io(struct io *io, const char *dir, enum io_type type)
356 {
357 reset_io(io);
358 io->type = type;
359 io->dir = dir;
360 }
361
362 static bool
363 init_io_rd(struct io *io, const char *argv[], const char *dir,
364 enum format_flags flags)
365 {
366 init_io(io, dir, IO_RD);
367 return format_argv(io->argv, argv, flags);
368 }
369
370 static bool
371 io_open(struct io *io, const char *name)
372 {
373 init_io(io, NULL, IO_FD);
374 io->pipe = *name ? open(name, O_RDONLY) : STDIN_FILENO;
375 return io->pipe != -1;
376 }
377
378 static bool
379 kill_io(struct io *io)
380 {
381 return io->pid == 0 || kill(io->pid, SIGKILL) != -1;
382 }
383
384 static bool
385 done_io(struct io *io)
386 {
387 pid_t pid = io->pid;
388
389 if (io->pipe != -1)
390 close(io->pipe);
391 free(io->buf);
392 reset_io(io);
393
394 while (pid > 0) {
395 int status;
396 pid_t waiting = waitpid(pid, &status, 0);
397
398 if (waiting < 0) {
399 if (errno == EINTR)
400 continue;
401 report("waitpid failed (%s)", strerror(errno));
402 return FALSE;
403 }
404
405 return waiting == pid &&
406 !WIFSIGNALED(status) &&
407 WIFEXITED(status) &&
408 !WEXITSTATUS(status);
409 }
410
411 return TRUE;
412 }
413
414 static bool
415 start_io(struct io *io)
416 {
417 int pipefds[2] = { -1, -1 };
418
419 if (io->type == IO_FD)
420 return TRUE;
421
422 if ((io->type == IO_RD || io->type == IO_WR) &&
423 pipe(pipefds) < 0)
424 return FALSE;
425 else if (io->type == IO_AP)
426 pipefds[1] = io->pipe;
427
428 if ((io->pid = fork())) {
429 if (pipefds[!(io->type == IO_WR)] != -1)
430 close(pipefds[!(io->type == IO_WR)]);
431 if (io->pid != -1) {
432 io->pipe = pipefds[!!(io->type == IO_WR)];
433 return TRUE;
434 }
435
436 } else {
437 if (io->type != IO_FG) {
438 int devnull = open("/dev/null", O_RDWR);
439 int readfd = io->type == IO_WR ? pipefds[0] : devnull;
440 int writefd = (io->type == IO_RD || io->type == IO_AP)
441 ? pipefds[1] : devnull;
442
443 dup2(readfd, STDIN_FILENO);
444 dup2(writefd, STDOUT_FILENO);
445 dup2(devnull, STDERR_FILENO);
446
447 close(devnull);
448 if (pipefds[0] != -1)
449 close(pipefds[0]);
450 if (pipefds[1] != -1)
451 close(pipefds[1]);
452 }
453
454 if (io->dir && *io->dir && chdir(io->dir) == -1)
455 die("Failed to change directory: %s", strerror(errno));
456
457 execvp(io->argv[0], (char *const*) io->argv);
458 die("Failed to execute program: %s", strerror(errno));
459 }
460
461 if (pipefds[!!(io->type == IO_WR)] != -1)
462 close(pipefds[!!(io->type == IO_WR)]);
463 return FALSE;
464 }
465
466 static bool
467 run_io(struct io *io, const char **argv, const char *dir, enum io_type type)
468 {
469 init_io(io, dir, type);
470 if (!format_argv(io->argv, argv, FORMAT_NONE))
471 return FALSE;
472 return start_io(io);
473 }
474
475 static int
476 run_io_do(struct io *io)
477 {
478 return start_io(io) && done_io(io);
479 }
480
481 static int
482 run_io_bg(const char **argv)
483 {
484 struct io io = {};
485
486 init_io(&io, NULL, IO_BG);
487 if (!format_argv(io.argv, argv, FORMAT_NONE))
488 return FALSE;
489 return run_io_do(&io);
490 }
491
492 static bool
493 run_io_fg(const char **argv, const char *dir)
494 {
495 struct io io = {};
496
497 init_io(&io, dir, IO_FG);
498 if (!format_argv(io.argv, argv, FORMAT_NONE))
499 return FALSE;
500 return run_io_do(&io);
501 }
502
503 static bool
504 run_io_append(const char **argv, enum format_flags flags, int fd)
505 {
506 struct io io = {};
507
508 init_io(&io, NULL, IO_AP);
509 io.pipe = fd;
510 if (format_argv(io.argv, argv, flags))
511 return run_io_do(&io);
512 close(fd);
513 return FALSE;
514 }
515
516 static bool
517 run_io_rd(struct io *io, const char **argv, enum format_flags flags)
518 {
519 return init_io_rd(io, argv, NULL, flags) && start_io(io);
520 }
521
522 static bool
523 io_eof(struct io *io)
524 {
525 return io->eof;
526 }
527
528 static int
529 io_error(struct io *io)
530 {
531 return io->error;
532 }
533
534 static bool
535 io_strerror(struct io *io)
536 {
537 return strerror(io->error);
538 }
539
540 static bool
541 io_can_read(struct io *io)
542 {
543 struct timeval tv = { 0, 500 };
544 fd_set fds;
545
546 FD_ZERO(&fds);
547 FD_SET(io->pipe, &fds);
548
549 return select(io->pipe + 1, &fds, NULL, NULL, &tv) > 0;
550 }
551
552 static ssize_t
553 io_read(struct io *io, void *buf, size_t bufsize)
554 {
555 do {
556 ssize_t readsize = read(io->pipe, buf, bufsize);
557
558 if (readsize < 0 && (errno == EAGAIN || errno == EINTR))
559 continue;
560 else if (readsize == -1)
561 io->error = errno;
562 else if (readsize == 0)
563 io->eof = 1;
564 return readsize;
565 } while (1);
566 }
567
568 static char *
569 io_get(struct io *io, int c, bool can_read)
570 {
571 char *eol;
572 ssize_t readsize;
573
574 if (!io->buf) {
575 io->buf = io->bufpos = malloc(BUFSIZ);
576 if (!io->buf)
577 return NULL;
578 io->bufalloc = BUFSIZ;
579 io->bufsize = 0;
580 }
581
582 while (TRUE) {
583 if (io->bufsize > 0) {
584 eol = memchr(io->bufpos, c, io->bufsize);
585 if (eol) {
586 char *line = io->bufpos;
587
588 *eol = 0;
589 io->bufpos = eol + 1;
590 io->bufsize -= io->bufpos - line;
591 return line;
592 }
593 }
594
595 if (io_eof(io)) {
596 if (io->bufsize) {
597 io->bufpos[io->bufsize] = 0;
598 io->bufsize = 0;
599 return io->bufpos;
600 }
601 return NULL;
602 }
603
604 if (!can_read)
605 return NULL;
606
607 if (io->bufsize > 0 && io->bufpos > io->buf)
608 memmove(io->buf, io->bufpos, io->bufsize);
609
610 io->bufpos = io->buf;
611 readsize = io_read(io, io->buf + io->bufsize, io->bufalloc - io->bufsize);
612 if (io_error(io))
613 return NULL;
614 io->bufsize += readsize;
615 }
616 }
617
618 static bool
619 io_write(struct io *io, const void *buf, size_t bufsize)
620 {
621 size_t written = 0;
622
623 while (!io_error(io) && written < bufsize) {
624 ssize_t size;
625
626 size = write(io->pipe, buf + written, bufsize - written);
627 if (size < 0 && (errno == EAGAIN || errno == EINTR))
628 continue;
629 else if (size == -1)
630 io->error = errno;
631 else
632 written += size;
633 }
634
635 return written == bufsize;
636 }
637
638 static bool
639 run_io_buf(const char **argv, char buf[], size_t bufsize)
640 {
641 struct io io = {};
642 bool error;
643
644 if (!run_io_rd(&io, argv, FORMAT_NONE))
645 return FALSE;
646
647 io.buf = io.bufpos = buf;
648 io.bufalloc = bufsize;
649 error = !io_get(&io, '\n', TRUE) && io_error(&io);
650 io.buf = NULL;
651
652 return done_io(&io) || error;
653 }
654
655 static int read_properties(struct io *io, const char *separators, int (*read)(char *, size_t, char *, size_t));
656
657 /*
658 * User requests
659 */
660
661 #define REQ_INFO \
662 /* XXX: Keep the view request first and in sync with views[]. */ \
663 REQ_GROUP("View switching") \
664 REQ_(VIEW_MAIN, "Show main view"), \
665 REQ_(VIEW_DIFF, "Show diff view"), \
666 REQ_(VIEW_LOG, "Show log view"), \
667 REQ_(VIEW_TREE, "Show tree view"), \
668 REQ_(VIEW_BLOB, "Show blob view"), \
669 REQ_(VIEW_BLAME, "Show blame view"), \
670 REQ_(VIEW_HELP, "Show help page"), \
671 REQ_(VIEW_PAGER, "Show pager view"), \
672 REQ_(VIEW_STATUS, "Show status view"), \
673 REQ_(VIEW_STAGE, "Show stage view"), \
674 \
675 REQ_GROUP("View manipulation") \
676 REQ_(ENTER, "Enter current line and scroll"), \
677 REQ_(NEXT, "Move to next"), \
678 REQ_(PREVIOUS, "Move to previous"), \
679 REQ_(PARENT, "Move to parent"), \
680 REQ_(VIEW_NEXT, "Move focus to next view"), \
681 REQ_(REFRESH, "Reload and refresh"), \
682 REQ_(MAXIMIZE, "Maximize the current view"), \
683 REQ_(VIEW_CLOSE, "Close the current view"), \
684 REQ_(QUIT, "Close all views and quit"), \
685 \
686 REQ_GROUP("View specific requests") \
687 REQ_(STATUS_UPDATE, "Update file status"), \
688 REQ_(STATUS_REVERT, "Revert file changes"), \
689 REQ_(STATUS_MERGE, "Merge file using external tool"), \
690 REQ_(STAGE_NEXT, "Find next chunk to stage"), \
691 \
692 REQ_GROUP("Cursor navigation") \
693 REQ_(MOVE_UP, "Move cursor one line up"), \
694 REQ_(MOVE_DOWN, "Move cursor one line down"), \
695 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
696 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
697 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
698 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
699 \
700 REQ_GROUP("Scrolling") \
701 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
702 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
703 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
704 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
705 \
706 REQ_GROUP("Searching") \
707 REQ_(SEARCH, "Search the view"), \
708 REQ_(SEARCH_BACK, "Search backwards in the view"), \
709 REQ_(FIND_NEXT, "Find next search match"), \
710 REQ_(FIND_PREV, "Find previous search match"), \
711 \
712 REQ_GROUP("Option manipulation") \
713 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
714 REQ_(TOGGLE_DATE, "Toggle date display"), \
715 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
716 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
717 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
718 \
719 REQ_GROUP("Misc") \
720 REQ_(PROMPT, "Bring up the prompt"), \
721 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
722 REQ_(SHOW_VERSION, "Show version information"), \
723 REQ_(STOP_LOADING, "Stop all loading views"), \
724 REQ_(EDIT, "Open in editor"), \
725 REQ_(NONE, "Do nothing")
726
727
728 /* User action requests. */
729 enum request {
730 #define REQ_GROUP(help)
731 #define REQ_(req, help) REQ_##req
732
733 /* Offset all requests to avoid conflicts with ncurses getch values. */
734 REQ_OFFSET = KEY_MAX + 1,
735 REQ_INFO
736
737 #undef REQ_GROUP
738 #undef REQ_
739 };
740
741 struct request_info {
742 enum request request;
743 const char *name;
744 int namelen;
745 const char *help;
746 };
747
748 static struct request_info req_info[] = {
749 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
750 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
751 REQ_INFO
752 #undef REQ_GROUP
753 #undef REQ_
754 };
755
756 static enum request
757 get_request(const char *name)
758 {
759 int namelen = strlen(name);
760 int i;
761
762 for (i = 0; i < ARRAY_SIZE(req_info); i++)
763 if (req_info[i].namelen == namelen &&
764 !string_enum_compare(req_info[i].name, name, namelen))
765 return req_info[i].request;
766
767 return REQ_NONE;
768 }
769
770
771 /*
772 * Options
773 */
774
775 static const char usage[] =
776 "tig " TIG_VERSION " (" __DATE__ ")\n"
777 "\n"
778 "Usage: tig [options] [revs] [--] [paths]\n"
779 " or: tig show [options] [revs] [--] [paths]\n"
780 " or: tig blame [rev] path\n"
781 " or: tig status\n"
782 " or: tig < [git command output]\n"
783 "\n"
784 "Options:\n"
785 " -v, --version Show version and exit\n"
786 " -h, --help Show help message and exit";
787
788 /* Option and state variables. */
789 static bool opt_date = TRUE;
790 static bool opt_author = TRUE;
791 static bool opt_line_number = FALSE;
792 static bool opt_line_graphics = TRUE;
793 static bool opt_rev_graph = FALSE;
794 static bool opt_show_refs = TRUE;
795 static int opt_num_interval = NUMBER_INTERVAL;
796 static int opt_tab_size = TAB_SIZE;
797 static int opt_author_cols = AUTHOR_COLS-1;
798 static char opt_path[SIZEOF_STR] = "";
799 static char opt_file[SIZEOF_STR] = "";
800 static char opt_ref[SIZEOF_REF] = "";
801 static char opt_head[SIZEOF_REF] = "";
802 static char opt_head_rev[SIZEOF_REV] = "";
803 static char opt_remote[SIZEOF_REF] = "";
804 static char opt_encoding[20] = "UTF-8";
805 static bool opt_utf8 = TRUE;
806 static char opt_codeset[20] = "UTF-8";
807 static iconv_t opt_iconv = ICONV_NONE;
808 static char opt_search[SIZEOF_STR] = "";
809 static char opt_cdup[SIZEOF_STR] = "";
810 static char opt_prefix[SIZEOF_STR] = "";
811 static char opt_git_dir[SIZEOF_STR] = "";
812 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
813 static char opt_editor[SIZEOF_STR] = "";
814 static FILE *opt_tty = NULL;
815
816 #define is_initial_commit() (!*opt_head_rev)
817 #define is_head_commit(rev) (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
818
819 static enum request
820 parse_options(int argc, const char *argv[], const char ***run_argv)
821 {
822 enum request request = REQ_VIEW_MAIN;
823 const char *subcommand;
824 bool seen_dashdash = FALSE;
825 /* XXX: This is vulnerable to the user overriding options
826 * required for the main view parser. */
827 static const char *custom_argv[SIZEOF_ARG] = {
828 "git", "log", "--no-color", "--pretty=raw", "--parents",
829 "--topo-order", NULL
830 };
831 int i, j = 6;
832
833 if (!isatty(STDIN_FILENO))
834 return REQ_VIEW_PAGER;
835
836 if (argc <= 1)
837 return REQ_VIEW_MAIN;
838
839 subcommand = argv[1];
840 if (!strcmp(subcommand, "status") || !strcmp(subcommand, "-S")) {
841 if (!strcmp(subcommand, "-S"))
842 warn("`-S' has been deprecated; use `tig status' instead");
843 if (argc > 2)
844 warn("ignoring arguments after `%s'", subcommand);
845 return REQ_VIEW_STATUS;
846
847 } else if (!strcmp(subcommand, "blame")) {
848 if (argc <= 2 || argc > 4)
849 die("invalid number of options to blame\n\n%s", usage);
850
851 i = 2;
852 if (argc == 4) {
853 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
854 i++;
855 }
856
857 string_ncopy(opt_file, argv[i], strlen(argv[i]));
858 return REQ_VIEW_BLAME;
859
860 } else if (!strcmp(subcommand, "show")) {
861 request = REQ_VIEW_DIFF;
862
863 } else if (!strcmp(subcommand, "log") || !strcmp(subcommand, "diff")) {
864 request = subcommand[0] == 'l' ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
865 warn("`tig %s' has been deprecated", subcommand);
866
867 } else {
868 subcommand = NULL;
869 }
870
871 if (subcommand) {
872 custom_argv[1] = subcommand;
873 j = 2;
874 }
875
876 for (i = 1 + !!subcommand; i < argc; i++) {
877 const char *opt = argv[i];
878
879 if (seen_dashdash || !strcmp(opt, "--")) {
880 seen_dashdash = TRUE;
881
882 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
883 printf("tig version %s\n", TIG_VERSION);
884 return REQ_NONE;
885
886 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
887 printf("%s\n", usage);
888 return REQ_NONE;
889 }
890
891 custom_argv[j++] = opt;
892 if (j >= ARRAY_SIZE(custom_argv))
893 die("command too long");
894 }
895
896 custom_argv[j] = NULL;
897 *run_argv = custom_argv;
898
899 return request;
900 }
901
902
903 /*
904 * Line-oriented content detection.
905 */
906
907 #define LINE_INFO \
908 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
909 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
910 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
911 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
912 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
913 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
914 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
915 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
916 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
917 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
918 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
919 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
920 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
921 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
922 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
923 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
924 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
925 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
926 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
927 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
928 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
929 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
930 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
931 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
932 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
933 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
934 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
935 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
936 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
937 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
938 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
939 LINE(DELIMITER, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
940 LINE(DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
941 LINE(LINE_NUMBER, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
942 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
943 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
944 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
945 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
946 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
947 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
948 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
949 LINE(MAIN_TRACKED, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
950 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
951 LINE(MAIN_HEAD, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
952 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
953 LINE(TREE_PARENT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_BOLD), \
954 LINE(TREE_MODE, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
955 LINE(TREE_DIR, "", COLOR_YELLOW, COLOR_DEFAULT, A_NORMAL), \
956 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
957 LINE(STAT_HEAD, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
958 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
959 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
960 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
961 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
962 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
963 LINE(BLAME_ID, "", COLOR_MAGENTA, COLOR_DEFAULT, 0)
964
965 enum line_type {
966 #define LINE(type, line, fg, bg, attr) \
967 LINE_##type
968 LINE_INFO,
969 LINE_NONE
970 #undef LINE
971 };
972
973 struct line_info {
974 const char *name; /* Option name. */
975 int namelen; /* Size of option name. */
976 const char *line; /* The start of line to match. */
977 int linelen; /* Size of string to match. */
978 int fg, bg, attr; /* Color and text attributes for the lines. */
979 };
980
981 static struct line_info line_info[] = {
982 #define LINE(type, line, fg, bg, attr) \
983 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
984 LINE_INFO
985 #undef LINE
986 };
987
988 static enum line_type
989 get_line_type(const char *line)
990 {
991 int linelen = strlen(line);
992 enum line_type type;
993
994 for (type = 0; type < ARRAY_SIZE(line_info); type++)
995 /* Case insensitive search matches Signed-off-by lines better. */
996 if (linelen >= line_info[type].linelen &&
997 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
998 return type;
999
1000 return LINE_DEFAULT;
1001 }
1002
1003 static inline int
1004 get_line_attr(enum line_type type)
1005 {
1006 assert(type < ARRAY_SIZE(line_info));
1007 return COLOR_PAIR(type) | line_info[type].attr;
1008 }
1009
1010 static struct line_info *
1011 get_line_info(const char *name)
1012 {
1013 size_t namelen = strlen(name);
1014 enum line_type type;
1015
1016 for (type = 0; type < ARRAY_SIZE(line_info); type++)
1017 if (namelen == line_info[type].namelen &&
1018 !string_enum_compare(line_info[type].name, name, namelen))
1019 return &line_info[type];
1020
1021 return NULL;
1022 }
1023
1024 static void
1025 init_colors(void)
1026 {
1027 int default_bg = line_info[LINE_DEFAULT].bg;
1028 int default_fg = line_info[LINE_DEFAULT].fg;
1029 enum line_type type;
1030
1031 start_color();
1032
1033 if (assume_default_colors(default_fg, default_bg) == ERR) {
1034 default_bg = COLOR_BLACK;
1035 default_fg = COLOR_WHITE;
1036 }
1037
1038 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
1039 struct line_info *info = &line_info[type];
1040 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
1041 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
1042
1043 init_pair(type, fg, bg);
1044 }
1045 }
1046
1047 struct line {
1048 enum line_type type;
1049
1050 /* State flags */
1051 unsigned int selected:1;
1052 unsigned int dirty:1;
1053 unsigned int cleareol:1;
1054
1055 void *data; /* User data */
1056 };
1057
1058
1059 /*
1060 * Keys
1061 */
1062
1063 struct keybinding {
1064 int alias;
1065 enum request request;
1066 };
1067
1068 static struct keybinding default_keybindings[] = {
1069 /* View switching */
1070 { 'm', REQ_VIEW_MAIN },
1071 { 'd', REQ_VIEW_DIFF },
1072 { 'l', REQ_VIEW_LOG },
1073 { 't', REQ_VIEW_TREE },
1074 { 'f', REQ_VIEW_BLOB },
1075 { 'B', REQ_VIEW_BLAME },
1076 { 'p', REQ_VIEW_PAGER },
1077 { 'h', REQ_VIEW_HELP },
1078 { 'S', REQ_VIEW_STATUS },
1079 { 'c', REQ_VIEW_STAGE },
1080
1081 /* View manipulation */
1082 { 'q', REQ_VIEW_CLOSE },
1083 { KEY_TAB, REQ_VIEW_NEXT },
1084 { KEY_RETURN, REQ_ENTER },
1085 { KEY_UP, REQ_PREVIOUS },
1086 { KEY_DOWN, REQ_NEXT },
1087 { 'R', REQ_REFRESH },
1088 { KEY_F(5), REQ_REFRESH },
1089 { 'O', REQ_MAXIMIZE },
1090
1091 /* Cursor navigation */
1092 { 'k', REQ_MOVE_UP },
1093 { 'j', REQ_MOVE_DOWN },
1094 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1095 { KEY_END, REQ_MOVE_LAST_LINE },
1096 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1097 { ' ', REQ_MOVE_PAGE_DOWN },
1098 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1099 { 'b', REQ_MOVE_PAGE_UP },
1100 { '-', REQ_MOVE_PAGE_UP },
1101
1102 /* Scrolling */
1103 { KEY_IC, REQ_SCROLL_LINE_UP },
1104 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1105 { 'w', REQ_SCROLL_PAGE_UP },
1106 { 's', REQ_SCROLL_PAGE_DOWN },
1107
1108 /* Searching */
1109 { '/', REQ_SEARCH },
1110 { '?', REQ_SEARCH_BACK },
1111 { 'n', REQ_FIND_NEXT },
1112 { 'N', REQ_FIND_PREV },
1113
1114 /* Misc */
1115 { 'Q', REQ_QUIT },
1116 { 'z', REQ_STOP_LOADING },
1117 { 'v', REQ_SHOW_VERSION },
1118 { 'r', REQ_SCREEN_REDRAW },
1119 { '.', REQ_TOGGLE_LINENO },
1120 { 'D', REQ_TOGGLE_DATE },
1121 { 'A', REQ_TOGGLE_AUTHOR },
1122 { 'g', REQ_TOGGLE_REV_GRAPH },
1123 { 'F', REQ_TOGGLE_REFS },
1124 { ':', REQ_PROMPT },
1125 { 'u', REQ_STATUS_UPDATE },
1126 { '!', REQ_STATUS_REVERT },
1127 { 'M', REQ_STATUS_MERGE },
1128 { '@', REQ_STAGE_NEXT },
1129 { ',', REQ_PARENT },
1130 { 'e', REQ_EDIT },
1131 };
1132
1133 #define KEYMAP_INFO \
1134 KEYMAP_(GENERIC), \
1135 KEYMAP_(MAIN), \
1136 KEYMAP_(DIFF), \
1137 KEYMAP_(LOG), \
1138 KEYMAP_(TREE), \
1139 KEYMAP_(BLOB), \
1140 KEYMAP_(BLAME), \
1141 KEYMAP_(PAGER), \
1142 KEYMAP_(HELP), \
1143 KEYMAP_(STATUS), \
1144 KEYMAP_(STAGE)
1145
1146 enum keymap {
1147 #define KEYMAP_(name) KEYMAP_##name
1148 KEYMAP_INFO
1149 #undef KEYMAP_
1150 };
1151
1152 static struct int_map keymap_table[] = {
1153 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
1154 KEYMAP_INFO
1155 #undef KEYMAP_
1156 };
1157
1158 #define set_keymap(map, name) \
1159 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
1160
1161 struct keybinding_table {
1162 struct keybinding *data;
1163 size_t size;
1164 };
1165
1166 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
1167
1168 static void
1169 add_keybinding(enum keymap keymap, enum request request, int key)
1170 {
1171 struct keybinding_table *table = &keybindings[keymap];
1172
1173 table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
1174 if (!table->data)
1175 die("Failed to allocate keybinding");
1176 table->data[table->size].alias = key;
1177 table->data[table->size++].request = request;
1178 }
1179
1180 /* Looks for a key binding first in the given map, then in the generic map, and
1181 * lastly in the default keybindings. */
1182 static enum request
1183 get_keybinding(enum keymap keymap, int key)
1184 {
1185 size_t i;
1186
1187 for (i = 0; i < keybindings[keymap].size; i++)
1188 if (keybindings[keymap].data[i].alias == key)
1189 return keybindings[keymap].data[i].request;
1190
1191 for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
1192 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
1193 return keybindings[KEYMAP_GENERIC].data[i].request;
1194
1195 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
1196 if (default_keybindings[i].alias == key)
1197 return default_keybindings[i].request;
1198
1199 return (enum request) key;
1200 }
1201
1202
1203 struct key {
1204 const char *name;
1205 int value;
1206 };
1207
1208 static struct key key_table[] = {
1209 { "Enter", KEY_RETURN },
1210 { "Space", ' ' },
1211 { "Backspace", KEY_BACKSPACE },
1212 { "Tab", KEY_TAB },
1213 { "Escape", KEY_ESC },
1214 { "Left", KEY_LEFT },
1215 { "Right", KEY_RIGHT },
1216 { "Up", KEY_UP },
1217 { "Down", KEY_DOWN },
1218 { "Insert", KEY_IC },
1219 { "Delete", KEY_DC },
1220 { "Hash", '#' },
1221 { "Home", KEY_HOME },
1222 { "End", KEY_END },
1223 { "PageUp", KEY_PPAGE },
1224 { "PageDown", KEY_NPAGE },
1225 { "F1", KEY_F(1) },
1226 { "F2", KEY_F(2) },
1227 { "F3", KEY_F(3) },
1228 { "F4", KEY_F(4) },
1229 { "F5", KEY_F(5) },
1230 { "F6", KEY_F(6) },
1231 { "F7", KEY_F(7) },
1232 { "F8", KEY_F(8) },
1233 { "F9", KEY_F(9) },
1234 { "F10", KEY_F(10) },
1235 { "F11", KEY_F(11) },
1236 { "F12", KEY_F(12) },
1237 };
1238
1239 static int
1240 get_key_value(const char *name)
1241 {
1242 int i;
1243
1244 for (i = 0; i < ARRAY_SIZE(key_table); i++)
1245 if (!strcasecmp(key_table[i].name, name))
1246 return key_table[i].value;
1247
1248 if (strlen(name) == 1 && isprint(*name))
1249 return (int) *name;
1250
1251 return ERR;
1252 }
1253
1254 static const char *
1255 get_key_name(int key_value)
1256 {
1257 static char key_char[] = "'X'";
1258 const char *seq = NULL;
1259 int key;
1260
1261 for (key = 0; key < ARRAY_SIZE(key_table); key++)
1262 if (key_table[key].value == key_value)
1263 seq = key_table[key].name;
1264
1265 if (seq == NULL &&
1266 key_value < 127 &&
1267 isprint(key_value)) {
1268 key_char[1] = (char) key_value;
1269 seq = key_char;
1270 }
1271
1272 return seq ? seq : "(no key)";
1273 }
1274
1275 static const char *
1276 get_key(enum request request)
1277 {
1278 static char buf[BUFSIZ];
1279 size_t pos = 0;
1280 char *sep = "";
1281 int i;
1282
1283 buf[pos] = 0;
1284
1285 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
1286 struct keybinding *keybinding = &default_keybindings[i];
1287
1288 if (keybinding->request != request)
1289 continue;
1290
1291 if (!string_format_from(buf, &pos, "%s%s", sep,
1292 get_key_name(keybinding->alias)))
1293 return "Too many keybindings!";
1294 sep = ", ";
1295 }
1296
1297 return buf;
1298 }
1299
1300 struct run_request {
1301 enum keymap keymap;
1302 int key;
1303 const char *argv[SIZEOF_ARG];
1304 };
1305
1306 static struct run_request *run_request;
1307 static size_t run_requests;
1308
1309 static enum request
1310 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
1311 {
1312 struct run_request *req;
1313
1314 if (argc >= ARRAY_SIZE(req->argv) - 1)
1315 return REQ_NONE;
1316
1317 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1318 if (!req)
1319 return REQ_NONE;
1320
1321 run_request = req;
1322 req = &run_request[run_requests];
1323 req->keymap = keymap;
1324 req->key = key;
1325 req->argv[0] = NULL;
1326
1327 if (!format_argv(req->argv, argv, FORMAT_NONE))
1328 return REQ_NONE;
1329
1330 return REQ_NONE + ++run_requests;
1331 }
1332
1333 static struct run_request *
1334 get_run_request(enum request request)
1335 {
1336 if (request <= REQ_NONE)
1337 return NULL;
1338 return &run_request[request - REQ_NONE - 1];
1339 }
1340
1341 static void
1342 add_builtin_run_requests(void)
1343 {
1344 const char *cherry_pick[] = { "git", "cherry-pick", "%(commit)", NULL };
1345 const char *gc[] = { "git", "gc", NULL };
1346 struct {
1347 enum keymap keymap;
1348 int key;
1349 int argc;
1350 const char **argv;
1351 } reqs[] = {
1352 { KEYMAP_MAIN, 'C', ARRAY_SIZE(cherry_pick) - 1, cherry_pick },
1353 { KEYMAP_GENERIC, 'G', ARRAY_SIZE(gc) - 1, gc },
1354 };
1355 int i;
1356
1357 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1358 enum request req;
1359
1360 req = add_run_request(reqs[i].keymap, reqs[i].key, reqs[i].argc, reqs[i].argv);
1361 if (req != REQ_NONE)
1362 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1363 }
1364 }
1365
1366 /*
1367 * User config file handling.
1368 */
1369
1370 static struct int_map color_map[] = {
1371 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
1372 COLOR_MAP(DEFAULT),
1373 COLOR_MAP(BLACK),
1374 COLOR_MAP(BLUE),
1375 COLOR_MAP(CYAN),
1376 COLOR_MAP(GREEN),
1377 COLOR_MAP(MAGENTA),
1378 COLOR_MAP(RED),
1379 COLOR_MAP(WHITE),
1380 COLOR_MAP(YELLOW),
1381 };
1382
1383 #define set_color(color, name) \
1384 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
1385
1386 static struct int_map attr_map[] = {
1387 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
1388 ATTR_MAP(NORMAL),
1389 ATTR_MAP(BLINK),
1390 ATTR_MAP(BOLD),
1391 ATTR_MAP(DIM),
1392 ATTR_MAP(REVERSE),
1393 ATTR_MAP(STANDOUT),
1394 ATTR_MAP(UNDERLINE),
1395 };
1396
1397 #define set_attribute(attr, name) \
1398 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
1399
1400 static int config_lineno;
1401 static bool config_errors;
1402 static const char *config_msg;
1403
1404 /* Wants: object fgcolor bgcolor [attr] */
1405 static int
1406 option_color_command(int argc, const char *argv[])
1407 {
1408 struct line_info *info;
1409
1410 if (argc != 3 && argc != 4) {
1411 config_msg = "Wrong number of arguments given to color command";
1412 return ERR;
1413 }
1414
1415 info = get_line_info(argv[0]);
1416 if (!info) {
1417 if (!string_enum_compare(argv[0], "main-delim", strlen("main-delim"))) {
1418 info = get_line_info("delimiter");
1419
1420 } else if (!string_enum_compare(argv[0], "main-date", strlen("main-date"))) {
1421 info = get_line_info("date");
1422
1423 } else {
1424 config_msg = "Unknown color name";
1425 return ERR;
1426 }
1427 }
1428
1429 if (set_color(&info->fg, argv[1]) == ERR ||
1430 set_color(&info->bg, argv[2]) == ERR) {
1431 config_msg = "Unknown color";
1432 return ERR;
1433 }
1434
1435 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1436 config_msg = "Unknown attribute";
1437 return ERR;
1438 }
1439
1440 return OK;
1441 }
1442
1443 static bool parse_bool(const char *s)
1444 {
1445 return (!strcmp(s, "1") || !strcmp(s, "true") ||
1446 !strcmp(s, "yes")) ? TRUE : FALSE;
1447 }
1448
1449 static int
1450 parse_int(const char *s, int default_value, int min, int max)
1451 {
1452 int value = atoi(s);
1453
1454 return (value < min || value > max) ? default_value : value;
1455 }
1456
1457 /* Wants: name = value */
1458 static int
1459 option_set_command(int argc, const char *argv[])
1460 {
1461 if (argc != 3) {
1462 config_msg = "Wrong number of arguments given to set command";
1463 return ERR;
1464 }
1465
1466 if (strcmp(argv[1], "=")) {
1467 config_msg = "No value assigned";
1468 return ERR;
1469 }
1470
1471 if (!strcmp(argv[0], "show-author")) {
1472 opt_author = parse_bool(argv[2]);
1473 return OK;
1474 }
1475
1476 if (!strcmp(argv[0], "show-date")) {
1477 opt_date = parse_bool(argv[2]);
1478 return OK;
1479 }
1480
1481 if (!strcmp(argv[0], "show-rev-graph")) {
1482 opt_rev_graph = parse_bool(argv[2]);
1483 return OK;
1484 }
1485
1486 if (!strcmp(argv[0], "show-refs")) {
1487 opt_show_refs = parse_bool(argv[2]);
1488 return OK;
1489 }
1490
1491 if (!strcmp(argv[0], "show-line-numbers")) {
1492 opt_line_number = parse_bool(argv[2]);
1493 return OK;
1494 }
1495
1496 if (!strcmp(argv[0], "line-graphics")) {
1497 opt_line_graphics = parse_bool(argv[2]);
1498 return OK;
1499 }
1500
1501 if (!strcmp(argv[0], "line-number-interval")) {
1502 opt_num_interval = parse_int(argv[2], opt_num_interval, 1, 1024);
1503 return OK;
1504 }
1505
1506 if (!strcmp(argv[0], "author-width")) {
1507 opt_author_cols = parse_int(argv[2], opt_author_cols, 0, 1024);
1508 return OK;
1509 }
1510
1511 if (!strcmp(argv[0], "tab-size")) {
1512 opt_tab_size = parse_int(argv[2], opt_tab_size, 1, 1024);
1513 return OK;
1514 }
1515
1516 if (!strcmp(argv[0], "commit-encoding")) {
1517 const char *arg = argv[2];
1518 int arglen = strlen(arg);
1519
1520 switch (arg[0]) {
1521 case '"':
1522 case '\'':
1523 if (arglen == 1 || arg[arglen - 1] != arg[0]) {
1524 config_msg = "Unmatched quotation";
1525 return ERR;
1526 }
1527 arg += 1; arglen -= 2;
1528 default:
1529 string_ncopy(opt_encoding, arg, strlen(arg));
1530 return OK;
1531 }
1532 }
1533
1534 config_msg = "Unknown variable name";
1535 return ERR;
1536 }
1537
1538 /* Wants: mode request key */
1539 static int
1540 option_bind_command(int argc, const char *argv[])
1541 {
1542 enum request request;
1543 int keymap;
1544 int key;
1545
1546 if (argc < 3) {
1547 config_msg = "Wrong number of arguments given to bind command";
1548 return ERR;
1549 }
1550
1551 if (set_keymap(&keymap, argv[0]) == ERR) {
1552 config_msg = "Unknown key map";
1553 return ERR;
1554 }
1555
1556 key = get_key_value(argv[1]);
1557 if (key == ERR) {
1558 config_msg = "Unknown key";
1559 return ERR;
1560 }
1561
1562 request = get_request(argv[2]);
1563 if (request == REQ_NONE) {
1564 struct {
1565 const char *name;
1566 enum request request;
1567 } obsolete[] = {
1568 { "cherry-pick", REQ_NONE },
1569 { "screen-resize", REQ_NONE },
1570 { "tree-parent", REQ_PARENT },
1571 };
1572 size_t namelen = strlen(argv[2]);
1573 int i;
1574
1575 for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
1576 if (namelen != strlen(obsolete[i].name) ||
1577 string_enum_compare(obsolete[i].name, argv[2], namelen))
1578 continue;
1579 if (obsolete[i].request != REQ_NONE)
1580 add_keybinding(keymap, obsolete[i].request, key);
1581 config_msg = "Obsolete request name";
1582 return ERR;
1583 }
1584 }
1585 if (request == REQ_NONE && *argv[2]++ == '!')
1586 request = add_run_request(keymap, key, argc - 2, argv + 2);
1587 if (request == REQ_NONE) {
1588 config_msg = "Unknown request name";
1589 return ERR;
1590 }
1591
1592 add_keybinding(keymap, request, key);
1593
1594 return OK;
1595 }
1596
1597 static int
1598 set_option(const char *opt, char *value)
1599 {
1600 const char *argv[SIZEOF_ARG];
1601 int argc = 0;
1602
1603 if (!argv_from_string(argv, &argc, value)) {
1604 config_msg = "Too many option arguments";
1605 return ERR;
1606 }
1607
1608 if (!strcmp(opt, "color"))
1609 return option_color_command(argc, argv);
1610
1611 if (!strcmp(opt, "set"))
1612 return option_set_command(argc, argv);
1613
1614 if (!strcmp(opt, "bind"))
1615 return option_bind_command(argc, argv);
1616
1617 config_msg = "Unknown option command";
1618 return ERR;
1619 }
1620
1621 static int
1622 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1623 {
1624 int status = OK;
1625
1626 config_lineno++;
1627 config_msg = "Internal error";
1628
1629 /* Check for comment markers, since read_properties() will
1630 * only ensure opt and value are split at first " \t". */
1631 optlen = strcspn(opt, "#");
1632 if (optlen == 0)
1633 return OK;
1634
1635 if (opt[optlen] != 0) {
1636 config_msg = "No option value";
1637 status = ERR;
1638
1639 } else {
1640 /* Look for comment endings in the value. */
1641 size_t len = strcspn(value, "#");
1642
1643 if (len < valuelen) {
1644 valuelen = len;
1645 value[valuelen] = 0;
1646 }
1647
1648 status = set_option(opt, value);
1649 }
1650
1651 if (status == ERR) {
1652 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1653 config_lineno, (int) optlen, opt, config_msg);
1654 config_errors = TRUE;
1655 }
1656
1657 /* Always keep going if errors are encountered. */
1658 return OK;
1659 }
1660
1661 static void
1662 load_option_file(const char *path)
1663 {
1664 struct io io = {};
1665
1666 /* It's ok that the file doesn't exist. */
1667 if (!io_open(&io, path))
1668 return;
1669
1670 config_lineno = 0;
1671 config_errors = FALSE;
1672
1673 if (read_properties(&io, " \t", read_option) == ERR ||
1674 config_errors == TRUE)
1675 fprintf(stderr, "Errors while loading %s.\n", path);
1676 }
1677
1678 static int
1679 load_options(void)
1680 {
1681 const char *home = getenv("HOME");
1682 const char *tigrc_user = getenv("TIGRC_USER");
1683 const char *tigrc_system = getenv("TIGRC_SYSTEM");
1684 char buf[SIZEOF_STR];
1685
1686 add_builtin_run_requests();
1687
1688 if (!tigrc_system) {
1689 if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
1690 return ERR;
1691 tigrc_system = buf;
1692 }
1693 load_option_file(tigrc_system);
1694
1695 if (!tigrc_user) {
1696 if (!home || !string_format(buf, "%s/.tigrc", home))
1697 return ERR;
1698 tigrc_user = buf;
1699 }
1700 load_option_file(tigrc_user);
1701
1702 return OK;
1703 }
1704
1705
1706 /*
1707 * The viewer
1708 */
1709
1710 struct view;
1711 struct view_ops;
1712
1713 /* The display array of active views and the index of the current view. */
1714 static struct view *display[2];
1715 static unsigned int current_view;
1716
1717 #define foreach_displayed_view(view, i) \
1718 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1719
1720 #define displayed_views() (display[1] != NULL ? 2 : 1)
1721
1722 /* Current head and commit ID */
1723 static char ref_blob[SIZEOF_REF] = "";
1724 static char ref_commit[SIZEOF_REF] = "HEAD";
1725 static char ref_head[SIZEOF_REF] = "HEAD";
1726
1727 struct view {
1728 const char *name; /* View name */
1729 const char *cmd_env; /* Command line set via environment */
1730 const char *id; /* Points to either of ref_{head,commit,blob} */
1731
1732 struct view_ops *ops; /* View operations */
1733
1734 enum keymap keymap; /* What keymap does this view have */
1735 bool git_dir; /* Whether the view requires a git directory. */
1736
1737 char ref[SIZEOF_REF]; /* Hovered commit reference */
1738 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1739
1740 int height, width; /* The width and height of the main window */
1741 WINDOW *win; /* The main window */
1742 WINDOW *title; /* The title window living below the main window */
1743
1744 /* Navigation */
1745 unsigned long offset; /* Offset of the window top */
1746 unsigned long lineno; /* Current line number */
1747 unsigned long p_offset; /* Previous offset of the window top */
1748 unsigned long p_lineno; /* Previous current line number */
1749 bool p_restore; /* Should the previous position be restored. */
1750
1751 /* Searching */
1752 char grep[SIZEOF_STR]; /* Search string */
1753 regex_t *regex; /* Pre-compiled regex */
1754
1755 /* If non-NULL, points to the view that opened this view. If this view
1756 * is closed tig will switch back to the parent view. */
1757 struct view *parent;
1758
1759 /* Buffering */
1760 size_t lines; /* Total number of lines */
1761 struct line *line; /* Line index */
1762 size_t line_alloc; /* Total number of allocated lines */
1763 unsigned int digits; /* Number of digits in the lines member. */
1764
1765 /* Drawing */
1766 struct line *curline; /* Line currently being drawn. */
1767 enum line_type curtype; /* Attribute currently used for drawing. */
1768 unsigned long col; /* Column when drawing. */
1769
1770 /* Loading */
1771 struct io io;
1772 struct io *pipe;
1773 time_t start_time;
1774 time_t update_secs;
1775 };
1776
1777 struct view_ops {
1778 /* What type of content being displayed. Used in the title bar. */
1779 const char *type;
1780 /* Default command arguments. */
1781 const char **argv;
1782 /* Open and reads in all view content. */
1783 bool (*open)(struct view *view);
1784 /* Read one line; updates view->line. */
1785 bool (*read)(struct view *view, char *data);
1786 /* Draw one line; @lineno must be < view->height. */
1787 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1788 /* Depending on view handle a special requests. */
1789 enum request (*request)(struct view *view, enum request request, struct line *line);
1790 /* Search for regex in a line. */
1791 bool (*grep)(struct view *view, struct line *line);
1792 /* Select line */
1793 void (*select)(struct view *view, struct line *line);
1794 };
1795
1796 static struct view_ops blame_ops;
1797 static struct view_ops blob_ops;
1798 static struct view_ops diff_ops;
1799 static struct view_ops help_ops;
1800 static struct view_ops log_ops;
1801 static struct view_ops main_ops;
1802 static struct view_ops pager_ops;
1803 static struct view_ops stage_ops;
1804 static struct view_ops status_ops;
1805 static struct view_ops tree_ops;
1806
1807 #define VIEW_STR(name, env, ref, ops, map, git) \
1808 { name, #env, ref, ops, map, git }
1809
1810 #define VIEW_(id, name, ops, git, ref) \
1811 VIEW_STR(name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1812
1813
1814 static struct view views[] = {
1815 VIEW_(MAIN, "main", &main_ops, TRUE, ref_head),
1816 VIEW_(DIFF, "diff", &diff_ops, TRUE, ref_commit),
1817 VIEW_(LOG, "log", &log_ops, TRUE, ref_head),
1818 VIEW_(TREE, "tree", &tree_ops, TRUE, ref_commit),
1819 VIEW_(BLOB, "blob", &blob_ops, TRUE, ref_blob),
1820 VIEW_(BLAME, "blame", &blame_ops, TRUE, ref_commit),
1821 VIEW_(HELP, "help", &help_ops, FALSE, ""),
1822 VIEW_(PAGER, "pager", &pager_ops, FALSE, "stdin"),
1823 VIEW_(STATUS, "status", &status_ops, TRUE, ""),
1824 VIEW_(STAGE, "stage", &stage_ops, TRUE, ""),
1825 };
1826
1827 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1828 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1829
1830 #define foreach_view(view, i) \
1831 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1832
1833 #define view_is_displayed(view) \
1834 (view == display[0] || view == display[1])
1835
1836
1837 enum line_graphic {
1838 LINE_GRAPHIC_VLINE
1839 };
1840
1841 static int line_graphics[] = {
1842 /* LINE_GRAPHIC_VLINE: */ '|'
1843 };
1844
1845 static inline void
1846 set_view_attr(struct view *view, enum line_type type)
1847 {
1848 if (!view->curline->selected && view->curtype != type) {
1849 wattrset(view->win, get_line_attr(type));
1850 wchgat(view->win, -1, 0, type, NULL);
1851 view->curtype = type;
1852 }
1853 }
1854
1855 static int
1856 draw_chars(struct view *view, enum line_type type, const char *string,
1857 int max_len, bool use_tilde)
1858 {
1859 int len = 0;
1860 int col = 0;
1861 int trimmed = FALSE;
1862
1863 if (max_len <= 0)
1864 return 0;
1865
1866 if (opt_utf8) {
1867 len = utf8_length(string, &col, max_len, &trimmed, use_tilde);
1868 } else {
1869 col = len = strlen(string);
1870 if (len > max_len) {
1871 if (use_tilde) {
1872 max_len -= 1;
1873 }
1874 col = len = max_len;
1875 trimmed = TRUE;
1876 }
1877 }
1878
1879 set_view_attr(view, type);
1880 waddnstr(view->win, string, len);
1881 if (trimmed && use_tilde) {
1882 set_view_attr(view, LINE_DELIMITER);
1883 waddch(view->win, '~');
1884 col++;
1885 }
1886
1887 return col;
1888 }
1889
1890 static int
1891 draw_space(struct view *view, enum line_type type, int max, int spaces)
1892 {
1893 static char space[] = " ";
1894 int col = 0;
1895
1896 spaces = MIN(max, spaces);
1897
1898 while (spaces > 0) {
1899 int len = MIN(spaces, sizeof(space) - 1);
1900
1901 col += draw_chars(view, type, space, spaces, FALSE);
1902 spaces -= len;
1903 }
1904
1905 return col;
1906 }
1907
1908 static bool
1909 draw_lineno(struct view *view, unsigned int lineno)
1910 {
1911 char number[10];
1912 int digits3 = view->digits < 3 ? 3 : view->digits;
1913 int max_number = MIN(digits3, STRING_SIZE(number));
1914 int max = view->width - view->col;
1915 int col;
1916
1917 if (max < max_number)
1918 max_number = max;
1919
1920 lineno += view->offset + 1;
1921 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1922 static char fmt[] = "%1ld";
1923
1924 if (view->digits <= 9)
1925 fmt[1] = '0' + digits3;
1926
1927 if (!string_format(number, fmt, lineno))
1928 number[0] = 0;
1929 col = draw_chars(view, LINE_LINE_NUMBER, number, max_number, TRUE);
1930 } else {
1931 col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
1932 }
1933
1934 if (col < max) {
1935 set_view_attr(view, LINE_DEFAULT);
1936 waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
1937 col++;
1938 }
1939
1940 if (col < max)
1941 col += draw_space(view, LINE_DEFAULT, max - col, 1);
1942 view->col += col;
1943
1944 return view->width - view->col <= 0;
1945 }
1946
1947 static bool
1948 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1949 {
1950 view->col += draw_chars(view, type, string, view->width - view->col, trim);
1951 return view->width - view->col <= 0;
1952 }
1953
1954 static bool
1955 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1956 {
1957 int max = view->width - view->col;
1958 int i;
1959
1960 if (max < size)
1961 size = max;
1962
1963 set_view_attr(view, type);
1964 /* Using waddch() instead of waddnstr() ensures that
1965 * they'll be rendered correctly for the cursor line. */
1966 for (i = 0; i < size; i++)
1967 waddch(view->win, graphic[i]);
1968
1969 view->col += size;
1970 if (size < max) {
1971 waddch(view->win, ' ');
1972 view->col++;
1973 }
1974
1975 return view->width - view->col <= 0;
1976 }
1977
1978 static bool
1979 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1980 {
1981 int max = MIN(view->width - view->col, len);
1982 int col;
1983
1984 if (text)
1985 col = draw_chars(view, type, text, max - 1, trim);
1986 else
1987 col = draw_space(view, type, max - 1, max - 1);
1988
1989 view->col += col + draw_space(view, LINE_DEFAULT, max - col, max - col);
1990 return view->width - view->col <= 0;
1991 }
1992
1993 static bool
1994 draw_date(struct view *view, struct tm *time)
1995 {
1996 char buf[DATE_COLS];
1997 char *date;
1998 int timelen = 0;
1999
2000 if (time)
2001 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
2002 date = timelen ? buf : NULL;
2003
2004 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
2005 }
2006
2007 static bool
2008 draw_author(struct view *view, const char *author)
2009 {
2010 bool trim = opt_author_cols == 0 || opt_author_cols > 5 || !author;
2011
2012 if (!trim) {
2013 static char initials[10];
2014 size_t pos;
2015
2016 #define is_initial_sep(c) (isspace(c) || ispunct(c) || (c) == '@')
2017
2018 memset(initials, 0, sizeof(initials));
2019 for (pos = 0; *author && pos < opt_author_cols - 1; author++, pos++) {
2020 while (is_initial_sep(*author))
2021 author++;
2022 strncpy(&initials[pos], author, sizeof(initials) - 1 - pos);
2023 while (*author && !is_initial_sep(author[1]))
2024 author++;
2025 }
2026
2027 author = initials;
2028 }
2029
2030 return draw_field(view, LINE_MAIN_AUTHOR, author, opt_author_cols, trim);
2031 }
2032
2033 static bool
2034 draw_view_line(struct view *view, unsigned int lineno)
2035 {
2036 struct line *line;
2037 bool selected = (view->offset + lineno == view->lineno);
2038
2039 assert(view_is_displayed(view));
2040
2041 if (view->offset + lineno >= view->lines)
2042 return FALSE;
2043
2044 line = &view->line[view->offset + lineno];
2045
2046 wmove(view->win, lineno, 0);
2047 if (line->cleareol)
2048 wclrtoeol(view->win);
2049 view->col = 0;
2050 view->curline = line;
2051 view->curtype = LINE_NONE;
2052 line->selected = FALSE;
2053 line->dirty = line->cleareol = 0;
2054
2055 if (selected) {
2056 set_view_attr(view, LINE_CURSOR);
2057 line->selected = TRUE;
2058 view->ops->select(view, line);
2059 }
2060
2061 return view->ops->draw(view, line, lineno);
2062 }
2063
2064 static void
2065 redraw_view_dirty(struct view *view)
2066 {
2067 bool dirty = FALSE;
2068 int lineno;
2069
2070 for (lineno = 0; lineno < view->height; lineno++) {
2071 if (view->offset + lineno >= view->lines)
2072 break;
2073 if (!view->line[view->offset + lineno].dirty)
2074 continue;
2075 dirty = TRUE;
2076 if (!draw_view_line(view, lineno))
2077 break;
2078 }
2079
2080 if (!dirty)
2081 return;
2082 wnoutrefresh(view->win);
2083 }
2084
2085 static void
2086 redraw_view_from(struct view *view, int lineno)
2087 {
2088 assert(0 <= lineno && lineno < view->height);
2089
2090 for (; lineno < view->height; lineno++) {
2091 if (!draw_view_line(view, lineno))
2092 break;
2093 }
2094
2095 wnoutrefresh(view->win);
2096 }
2097
2098 static void
2099 redraw_view(struct view *view)
2100 {
2101 werase(view->win);
2102 redraw_view_from(view, 0);
2103 }
2104
2105
2106 static void
2107 update_view_title(struct view *view)
2108 {
2109 char buf[SIZEOF_STR];
2110 char state[SIZEOF_STR];
2111 size_t bufpos = 0, statelen = 0;
2112
2113 assert(view_is_displayed(view));
2114
2115 if (view != VIEW(REQ_VIEW_STATUS) && view->lines) {
2116 unsigned int view_lines = view->offset + view->height;
2117 unsigned int lines = view->lines
2118 ? MIN(view_lines, view->lines) * 100 / view->lines
2119 : 0;
2120
2121 string_format_from(state, &statelen, " - %s %d of %d (%d%%)",
2122 view->ops->type,
2123 view->lineno + 1,
2124 view->lines,
2125 lines);
2126
2127 }
2128
2129 if (view->pipe) {
2130 time_t secs = time(NULL) - view->start_time;
2131
2132 /* Three git seconds are a long time ... */
2133 if (secs > 2)
2134 string_format_from(state, &statelen, " loading %lds", secs);
2135 }
2136
2137 string_format_from(buf, &bufpos, "[%s]", view->name);
2138 if (*view->ref && bufpos < view->width) {
2139 size_t refsize = strlen(view->ref);
2140 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
2141
2142 if (minsize < view->width)
2143 refsize = view->width - minsize + 7;
2144 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
2145 }
2146
2147 if (statelen && bufpos < view->width) {
2148 string_format_from(buf, &bufpos, "%s", state);
2149 }
2150
2151 if (view == display[current_view])
2152 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
2153 else
2154 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
2155
2156 mvwaddnstr(view->title, 0, 0, buf, bufpos);
2157 wclrtoeol(view->title);
2158 wnoutrefresh(view->title);
2159 }
2160
2161 static void
2162 resize_display(void)
2163 {
2164 int offset, i;
2165 struct view *base = display[0];
2166 struct view *view = display[1] ? display[1] : display[0];
2167
2168 /* Setup window dimensions */
2169
2170 getmaxyx(stdscr, base->height, base->width);
2171
2172 /* Make room for the status window. */
2173 base->height -= 1;
2174
2175 if (view != base) {
2176 /* Horizontal split. */
2177 view->width = base->width;
2178 view->height = SCALE_SPLIT_VIEW(base->height);
2179 base->height -= view->height;
2180
2181 /* Make room for the title bar. */
2182 view->height -= 1;
2183 }
2184
2185 /* Make room for the title bar. */
2186 base->height -= 1;
2187
2188 offset = 0;
2189
2190 foreach_displayed_view (view, i) {
2191 if (!view->win) {
2192 view->win = newwin(view->height, 0, offset, 0);
2193 if (!view->win)
2194 die("Failed to create %s view", view->name);
2195
2196 scrollok(view->win, FALSE);
2197
2198 view->title = newwin(1, 0, offset + view->height, 0);
2199 if (!view->title)
2200 die("Failed to create title window");
2201
2202 } else {
2203 wresize(view->win, view->height, view->width);
2204 mvwin(view->win, offset, 0);
2205 mvwin(view->title, offset + view->height, 0);
2206 }
2207
2208 offset += view->height + 1;
2209 }
2210 }
2211
2212 static void
2213 redraw_display(bool clear)
2214 {
2215 struct view *view;
2216 int i;
2217
2218 foreach_displayed_view (view, i) {
2219 if (clear)
2220 wclear(view->win);
2221 redraw_view(view);
2222 update_view_title(view);
2223 }
2224 }
2225
2226 static void
2227 toggle_view_option(bool *option, const char *help)
2228 {
2229 *option = !*option;
2230 redraw_display(FALSE);
2231 report("%sabling %s", *option ? "En" : "Dis", help);
2232 }
2233
2234 /*
2235 * Navigation
2236 */
2237
2238 /* Scrolling backend */
2239 static void
2240 do_scroll_view(struct view *view, int lines)
2241 {
2242 bool redraw_current_line = FALSE;
2243
2244 /* The rendering expects the new offset. */
2245 view->offset += lines;
2246
2247 assert(0 <= view->offset && view->offset < view->lines);
2248 assert(lines);
2249
2250 /* Move current line into the view. */
2251 if (view->lineno < view->offset) {
2252 view->lineno = view->offset;
2253 redraw_current_line = TRUE;
2254 } else if (view->lineno >= view->offset + view->height) {
2255 view->lineno = view->offset + view->height - 1;
2256 redraw_current_line = TRUE;
2257 }
2258
2259 assert(view->offset <= view->lineno && view->lineno < view->lines);
2260
2261 /* Redraw the whole screen if scrolling is pointless. */
2262 if (view->height < ABS(lines)) {
2263 redraw_view(view);
2264
2265 } else {
2266 int line = lines > 0 ? view->height - lines : 0;
2267 int end = line + ABS(lines);
2268
2269 scrollok(view->win, TRUE);
2270 wscrl(view->win, lines);
2271 scrollok(view->win, FALSE);
2272
2273 while (line < end && draw_view_line(view, line))
2274 line++;
2275
2276 if (redraw_current_line)
2277 draw_view_line(view, view->lineno - view->offset);
2278 wnoutrefresh(view->win);
2279 }
2280
2281 report("");
2282 }
2283
2284 /* Scroll frontend */
2285 static void
2286 scroll_view(struct view *view, enum request request)
2287 {
2288 int lines = 1;
2289
2290 assert(view_is_displayed(view));
2291
2292 switch (request) {
2293 case REQ_SCROLL_PAGE_DOWN:
2294 lines = view->height;
2295 case REQ_SCROLL_LINE_DOWN:
2296 if (view->offset + lines > view->lines)
2297 lines = view->lines - view->offset;
2298
2299 if (lines == 0 || view->offset + view->height >= view->lines) {
2300 report("Cannot scroll beyond the last line");
2301 return;
2302 }
2303 break;
2304
2305 case REQ_SCROLL_PAGE_UP:
2306 lines = view->height;
2307 case REQ_SCROLL_LINE_UP:
2308 if (lines > view->offset)
2309 lines = view->offset;
2310
2311 if (lines == 0) {
2312 report("Cannot scroll beyond the first line");
2313 return;
2314 }
2315
2316 lines = -lines;
2317 break;
2318
2319 default:
2320 die("request %d not handled in switch", request);
2321 }
2322
2323 do_scroll_view(view, lines);
2324 }
2325
2326 /* Cursor moving */
2327 static void
2328 move_view(struct view *view, enum request request)
2329 {
2330 int scroll_steps = 0;
2331 int steps;
2332
2333 switch (request) {
2334 case REQ_MOVE_FIRST_LINE:
2335 steps = -view->lineno;
2336 break;
2337
2338 case REQ_MOVE_LAST_LINE:
2339 steps = view->lines - view->lineno - 1;
2340 break;
2341
2342 case REQ_MOVE_PAGE_UP:
2343 steps = view->height > view->lineno
2344 ? -view->lineno : -view->height;
2345 break;
2346
2347 case REQ_MOVE_PAGE_DOWN:
2348 steps = view->lineno + view->height >= view->lines
2349 ? view->lines - view->lineno - 1 : view->height;
2350 break;
2351
2352 case REQ_MOVE_UP:
2353 steps = -1;
2354 break;
2355
2356 case REQ_MOVE_DOWN:
2357 steps = 1;
2358 break;
2359
2360 default:
2361 die("request %d not handled in switch", request);
2362 }
2363
2364 if (steps <= 0 && view->lineno == 0) {
2365 report("Cannot move beyond the first line");
2366 return;
2367
2368 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2369 report("Cannot move beyond the last line");
2370 return;
2371 }
2372
2373 /* Move the current line */
2374 view->lineno += steps;
2375 assert(0 <= view->lineno && view->lineno < view->lines);
2376
2377 /* Check whether the view needs to be scrolled */
2378 if (view->lineno < view->offset ||
2379 view->lineno >= view->offset + view->height) {
2380 scroll_steps = steps;
2381 if (steps < 0 && -steps > view->offset) {
2382 scroll_steps = -view->offset;
2383
2384 } else if (steps > 0) {
2385 if (view->lineno == view->lines - 1 &&
2386 view->lines > view->height) {
2387 scroll_steps = view->lines - view->offset - 1;
2388 if (scroll_steps >= view->height)
2389 scroll_steps -= view->height - 1;
2390 }
2391 }
2392 }
2393
2394 if (!view_is_displayed(view)) {
2395 view->offset += scroll_steps;
2396 assert(0 <= view->offset && view->offset < view->lines);
2397 view->ops->select(view, &view->line[view->lineno]);
2398 return;
2399 }
2400
2401 /* Repaint the old "current" line if we be scrolling */
2402 if (ABS(steps) < view->height)
2403 draw_view_line(view, view->lineno - steps - view->offset);
2404
2405 if (scroll_steps) {
2406 do_scroll_view(view, scroll_steps);
2407 return;
2408 }
2409
2410 /* Draw the current line */
2411 draw_view_line(view, view->lineno - view->offset);
2412
2413 wnoutrefresh(view->win);
2414 report("");
2415 }
2416
2417
2418 /*
2419 * Searching
2420 */
2421
2422 static void search_view(struct view *view, enum request request);
2423
2424 static void
2425 select_view_line(struct view *view, unsigned long lineno)
2426 {
2427 if (lineno - view->offset >= view->height) {
2428 view->offset = lineno;
2429 view->lineno = lineno;
2430 if (view_is_displayed(view))
2431 redraw_view(view);
2432
2433 } else {
2434 unsigned long old_lineno = view->lineno - view->offset;
2435
2436 view->lineno = lineno;
2437 if (view_is_displayed(view)) {
2438 draw_view_line(view, old_lineno);
2439 draw_view_line(view, view->lineno - view->offset);
2440 wnoutrefresh(view->win);
2441 } else {
2442 view->ops->select(view, &view->line[view->lineno]);
2443 }
2444 }
2445 }
2446
2447 static void
2448 find_next(struct view *view, enum request request)
2449 {
2450 unsigned long lineno = view->lineno;
2451 int direction;
2452
2453 if (!*view->grep) {
2454 if (!*opt_search)
2455 report("No previous search");
2456 else
2457 search_view(view, request);
2458 return;
2459 }
2460
2461 switch (request) {
2462 case REQ_SEARCH:
2463 case REQ_FIND_NEXT:
2464 direction = 1;
2465 break;
2466
2467 case REQ_SEARCH_BACK:
2468 case REQ_FIND_PREV:
2469 direction = -1;
2470 break;
2471
2472 default:
2473 return;
2474 }
2475
2476 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2477 lineno += direction;
2478
2479 /* Note, lineno is unsigned long so will wrap around in which case it
2480 * will become bigger than view->lines. */
2481 for (; lineno < view->lines; lineno += direction) {
2482 if (view->ops->grep(view, &view->line[lineno])) {
2483 select_view_line(view, lineno);
2484 report("Line %ld matches '%s'", lineno + 1, view->grep);
2485 return;
2486 }
2487 }
2488
2489 report("No match found for '%s'", view->grep);
2490 }
2491
2492 static void
2493 search_view(struct view *view, enum request request)
2494 {
2495 int regex_err;
2496
2497 if (view->regex) {
2498 regfree(view->regex);
2499 *view->grep = 0;
2500 } else {
2501 view->regex = calloc(1, sizeof(*view->regex));
2502 if (!view->regex)
2503 return;
2504 }
2505
2506 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2507 if (regex_err != 0) {
2508 char buf[SIZEOF_STR] = "unknown error";
2509
2510 regerror(regex_err, view->regex, buf, sizeof(buf));
2511 report("Search failed: %s", buf);
2512 return;
2513 }
2514
2515 string_copy(view->grep, opt_search);
2516
2517 find_next(view, request);
2518 }
2519
2520 /*
2521 * Incremental updating
2522 */
2523
2524 static void
2525 reset_view(struct view *view)
2526 {
2527 int i;
2528
2529 for (i = 0; i < view->lines; i++)
2530 free(view->line[i].data);
2531 free(view->line);
2532
2533 view->p_offset = view->offset;
2534 view->p_lineno = view->lineno;
2535
2536 view->line = NULL;
2537 view->offset = 0;
2538 view->lines = 0;
2539 view->lineno = 0;
2540 view->line_alloc = 0;
2541 view->vid[0] = 0;
2542 view->update_secs = 0;
2543 }
2544
2545 static void
2546 free_argv(const char *argv[])
2547 {
2548 int argc;
2549
2550 for (argc = 0; argv[argc]; argc++)
2551 free((void *) argv[argc]);
2552 }
2553
2554 static bool
2555 format_argv(const char *dst_argv[], const char *src_argv[], enum format_flags flags)
2556 {
2557 char buf[SIZEOF_STR];
2558 int argc;
2559 bool noreplace = flags == FORMAT_NONE;
2560
2561 free_argv(dst_argv);
2562
2563 for (argc = 0; src_argv[argc]; argc++) {
2564 const char *arg = src_argv[argc];
2565 size_t bufpos = 0;
2566
2567 while (arg) {
2568 char *next = strstr(arg, "%(");
2569 int len = next - arg;
2570 const char *value;
2571
2572 if (!next || noreplace) {
2573 if (flags == FORMAT_DASH && !strcmp(arg, "--"))
2574 noreplace = TRUE;
2575 len = strlen(arg);
2576 value = "";
2577
2578 } else if (!prefixcmp(next, "%(directory)")) {
2579 value = opt_path;
2580
2581 } else if (!prefixcmp(next, "%(file)")) {
2582 value = opt_file;
2583
2584 } else if (!prefixcmp(next, "%(ref)")) {
2585 value = *opt_ref ? opt_ref : "HEAD";
2586
2587 } else if (!prefixcmp(next, "%(head)")) {
2588 value = ref_head;
2589
2590 } else if (!prefixcmp(next, "%(commit)")) {
2591 value = ref_commit;
2592
2593 } else if (!prefixcmp(next, "%(blob)")) {
2594 value = ref_blob;
2595
2596 } else {
2597 report("Unknown replacement: `%s`", next);
2598 return FALSE;
2599 }
2600
2601 if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2602 return FALSE;
2603
2604 arg = next && !noreplace ? strchr(next, ')') + 1 : NULL;
2605 }
2606
2607 dst_argv[argc] = strdup(buf);
2608 if (!dst_argv[argc])
2609 break;
2610 }
2611
2612 dst_argv[argc] = NULL;
2613
2614 return src_argv[argc] == NULL;
2615 }
2616
2617 static bool
2618 restore_view_position(struct view *view)
2619 {
2620 if (!view->p_restore || (view->pipe && view->lines <= view->p_lineno))
2621 return FALSE;
2622
2623 /* Changing the view position cancels the restoring. */
2624 /* FIXME: Changing back to the first line is not detected. */
2625 if (view->offset != 0 || view->lineno != 0) {
2626 view->p_restore = FALSE;
2627 return FALSE;
2628 }
2629
2630 if (view->p_lineno >= view->lines) {
2631 view->p_lineno = view->lines > 0 ? view->lines - 1 : 0;
2632 if (view->p_offset >= view->p_lineno) {
2633 unsigned long half = view->height / 2;
2634
2635 if (view->p_lineno > half)
2636 view->p_offset = view->p_lineno - half;
2637 else
2638 view->p_offset = 0;
2639 }
2640 }
2641
2642 if (view_is_displayed(view) &&
2643 view->offset != view->p_offset &&
2644 view->lineno != view->p_lineno)
2645 werase(view->win);
2646
2647 view->offset = view->p_offset;
2648 view->lineno = view->p_lineno;
2649 view->p_restore = FALSE;
2650
2651 return TRUE;
2652 }
2653
2654 static void
2655 end_update(struct view *view, bool force)
2656 {
2657 if (!view->pipe)
2658 return;
2659 while (!view->ops->read(view, NULL))
2660 if (!force)
2661 return;
2662 set_nonblocking_input(FALSE);
2663 if (force)
2664 kill_io(view->pipe);
2665 done_io(view->pipe);
2666 view->pipe = NULL;
2667 }
2668
2669 static void
2670 setup_update(struct view *view, const char *vid)
2671 {
2672 set_nonblocking_input(TRUE);
2673 reset_view(view);
2674 string_copy_rev(view->vid, vid);
2675 view->pipe = &view->io;
2676 view->start_time = time(NULL);
2677 }
2678
2679 static bool
2680 prepare_update(struct view *view, const char *argv[], const char *dir,
2681 enum format_flags flags)
2682 {
2683 if (view->pipe)
2684 end_update(view, TRUE);
2685 return init_io_rd(&view->io, argv, dir, flags);
2686 }
2687
2688 static bool
2689 prepare_update_file(struct view *view, const char *name)
2690 {
2691 if (view->pipe)
2692 end_update(view, TRUE);
2693 return io_open(&view->io, name);
2694 }
2695
2696 static bool
2697 begin_update(struct view *view, bool refresh)
2698 {
2699 if (view->pipe)
2700 end_update(view, TRUE);
2701
2702 if (refresh) {
2703 if (!start_io(&view->io))
2704 return FALSE;
2705
2706 } else {
2707 if (view == VIEW(REQ_VIEW_TREE) && strcmp(view->vid, view->id))
2708 opt_path[0] = 0;
2709
2710 if (!run_io_rd(&view->io, view->ops->argv, FORMAT_ALL))
2711 return FALSE;
2712
2713 /* Put the current ref_* value to the view title ref
2714 * member. This is needed by the blob view. Most other
2715 * views sets it automatically after loading because the
2716 * first line is a commit line. */
2717 string_copy_rev(view->ref, view->id);
2718 }
2719
2720 setup_update(view, view->id);
2721
2722 return TRUE;
2723 }
2724
2725 #define ITEM_CHUNK_SIZE 256
2726 static void *
2727 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2728 {
2729 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2730 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2731
2732 if (mem == NULL || num_chunks != num_chunks_new) {
2733 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2734 mem = realloc(mem, *size * item_size);
2735 }
2736
2737 return mem;
2738 }
2739
2740 static struct line *
2741 realloc_lines(struct view *view, size_t line_size)
2742 {
2743 size_t alloc = view->line_alloc;
2744 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2745 sizeof(*view->line));
2746
2747 if (!tmp)
2748 return NULL;
2749
2750 view->line = tmp;
2751 view->line_alloc = alloc;
2752 return view->line;
2753 }
2754
2755 static bool
2756 update_view(struct view *view)
2757 {
2758 char out_buffer[BUFSIZ * 2];
2759 char *line;
2760 /* Clear the view and redraw everything since the tree sorting
2761 * might have rearranged things. */
2762 bool redraw = view->lines == 0;
2763 bool can_read = TRUE;
2764
2765 if (!view->pipe)
2766 return TRUE;
2767
2768 if (!io_can_read(view->pipe)) {
2769 if (view->lines == 0) {
2770 time_t secs = time(NULL) - view->start_time;
2771
2772 if (secs > view->update_secs) {
2773 if (view->update_secs == 0)
2774 redraw_view(view);
2775 update_view_title(view);
2776 view->update_secs = secs;
2777 }
2778 }
2779 return TRUE;
2780 }
2781
2782 for (; (line = io_get(view->pipe, '\n', can_read)); can_read = FALSE) {
2783 if (opt_iconv != ICONV_NONE) {
2784 ICONV_CONST char *inbuf = line;
2785 size_t inlen = strlen(line) + 1;
2786
2787 char *outbuf = out_buffer;
2788 size_t outlen = sizeof(out_buffer);
2789
2790 size_t ret;
2791
2792 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2793 if (ret != (size_t) -1)
2794 line = out_buffer;
2795 }
2796
2797 if (!view->ops->read(view, line)) {
2798 report("Allocation failure");
2799 end_update(view, TRUE);
2800 return FALSE;
2801 }
2802 }
2803
2804 {
2805 unsigned long lines = view->lines;
2806 int digits;
2807
2808 for (digits = 0; lines; digits++)
2809 lines /= 10;
2810
2811 /* Keep the displayed view in sync with line number scaling. */
2812 if (digits != view->digits) {
2813 view->digits = digits;
2814 if (opt_line_number || view == VIEW(REQ_VIEW_BLAME))
2815 redraw = TRUE;
2816 }
2817 }
2818
2819 if (io_error(view->pipe)) {
2820 report("Failed to read: %s", io_strerror(view->pipe));
2821 end_update(view, TRUE);
2822
2823 } else if (io_eof(view->pipe)) {
2824 report("");
2825 end_update(view, FALSE);
2826 }
2827
2828 if (restore_view_position(view))
2829 redraw = TRUE;
2830
2831 if (!view_is_displayed(view))
2832 return TRUE;
2833
2834 if (redraw)
2835 redraw_view_from(view, 0);
2836 else
2837 redraw_view_dirty(view);
2838
2839 /* Update the title _after_ the redraw so that if the redraw picks up a
2840 * commit reference in view->ref it'll be available here. */
2841 update_view_title(view);
2842 return TRUE;
2843 }
2844
2845 static struct line *
2846 add_line_data(struct view *view, void *data, enum line_type type)
2847 {
2848 struct line *line;
2849
2850 if (!realloc_lines(view, view->lines + 1))
2851 return NULL;
2852
2853 line = &view->line[view->lines++];
2854 memset(line, 0, sizeof(*line));
2855 line->type = type;
2856 line->data = data;
2857 line->dirty = 1;
2858
2859 return line;
2860 }
2861
2862 static struct line *
2863 add_line_text(struct view *view, const char *text, enum line_type type)
2864 {
2865 char *data = text ? strdup(text) : NULL;
2866
2867 return data ? add_line_data(view, data, type) : NULL;
2868 }
2869
2870 static struct line *
2871 add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
2872 {
2873 char buf[SIZEOF_STR];
2874 va_list args;
2875
2876 va_start(args, fmt);
2877 if (vsnprintf(buf, sizeof(buf), fmt, args) >= sizeof(buf))
2878 buf[0] = 0;
2879 va_end(args);
2880
2881 return buf[0] ? add_line_text(view, buf, type) : NULL;
2882 }
2883
2884 /*
2885 * View opening
2886 */
2887
2888 enum open_flags {
2889 OPEN_DEFAULT = 0, /* Use default view switching. */
2890 OPEN_SPLIT = 1, /* Split current view. */
2891 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2892 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2893 OPEN_NOMAXIMIZE = 8, /* Do not maximize the current view. */
2894 OPEN_REFRESH = 16, /* Refresh view using previous command. */
2895 OPEN_PREPARED = 32, /* Open already prepared command. */
2896 };
2897
2898 static void
2899 open_view(struct view *prev, enum request request, enum open_flags flags)
2900 {
2901 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2902 bool split = !!(flags & OPEN_SPLIT);
2903 bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
2904 bool nomaximize = !!(flags & (OPEN_NOMAXIMIZE | OPEN_REFRESH));
2905 struct view *view = VIEW(request);
2906 int nviews = displayed_views();
2907 struct view *base_view = display[0];
2908
2909 if (view == prev && nviews == 1 && !reload) {
2910 report("Already in %s view", view->name);
2911 return;
2912 }
2913
2914 if (view->git_dir && !opt_git_dir[0]) {
2915 report("The %s view is disabled in pager view", view->name);
2916 return;
2917 }
2918
2919 if (split) {
2920 display[1] = view;
2921 if (!backgrounded)
2922 current_view = 1;
2923 } else if (!nomaximize) {
2924 /* Maximize the current view. */
2925 memset(display, 0, sizeof(display));
2926 current_view = 0;
2927 display[current_view] = view;
2928 }
2929
2930 /* Resize the view when switching between split- and full-screen,
2931 * or when switching between two different full-screen views. */
2932 if (nviews != displayed_views() ||
2933 (nviews == 1 && base_view != display[0]))
2934 resize_display();
2935
2936 if (view->ops->open) {
2937 if (view->pipe)
2938 end_update(view, TRUE);
2939 if (!view->ops->open(view)) {
2940 report("Failed to load %s view", view->name);
2941 return;
2942 }
2943 restore_view_position(view);
2944
2945 } else if ((reload || strcmp(view->vid, view->id)) &&
2946 !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
2947 report("Failed to load %s view", view->name);
2948 return;
2949 }
2950
2951 if (split && prev->lineno - prev->offset >= prev->height) {
2952 /* Take the title line into account. */
2953 int lines = prev->lineno - prev->offset - prev->height + 1;
2954
2955 /* Scroll the view that was split if the current line is
2956 * outside the new limited view. */
2957 do_scroll_view(prev, lines);
2958 }
2959
2960 if (prev && view != prev) {
2961 if (split && !backgrounded) {
2962 /* "Blur" the previous view. */
2963 update_view_title(prev);
2964 }
2965
2966 view->parent = prev;
2967 }
2968
2969 if (view->pipe && view->lines == 0) {
2970 /* Clear the old view and let the incremental updating refill
2971 * the screen. */
2972 werase(view->win);
2973 view->p_restore = flags & (OPEN_RELOAD | OPEN_REFRESH);
2974 report("");
2975 } else if (view_is_displayed(view)) {
2976 redraw_view(view);
2977 report("");
2978 }
2979
2980 /* If the view is backgrounded the above calls to report()
2981 * won't redraw the view title. */
2982 if (backgrounded)
2983 update_view_title(view);
2984 }
2985
2986 static void
2987 open_external_viewer(const char *argv[], const char *dir)
2988 {
2989 def_prog_mode(); /* save current tty modes */
2990 endwin(); /* restore original tty modes */
2991 run_io_fg(argv, dir);
2992 fprintf(stderr, "Press Enter to continue");
2993 getc(opt_tty);
2994 reset_prog_mode();
2995 redraw_display(TRUE);
2996 }
2997
2998 static void
2999 open_mergetool(const char *file)
3000 {
3001 const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
3002
3003 open_external_viewer(mergetool_argv, opt_cdup);
3004 }
3005
3006 static void
3007 open_editor(bool from_root, const char *file)
3008 {
3009 const char *editor_argv[] = { "vi", file, NULL };
3010 const char *editor;
3011
3012 editor = getenv("GIT_EDITOR");
3013 if (!editor && *opt_editor)
3014 editor = opt_editor;
3015 if (!editor)
3016 editor = getenv("VISUAL");
3017 if (!editor)
3018 editor = getenv("EDITOR");
3019 if (!editor)
3020 editor = "vi";
3021
3022 editor_argv[0] = editor;
3023 open_external_viewer(editor_argv, from_root ? opt_cdup : NULL);
3024 }
3025
3026 static void
3027 open_run_request(enum request request)
3028 {
3029 struct run_request *req = get_run_request(request);
3030 const char *argv[ARRAY_SIZE(req->argv)] = { NULL };
3031
3032 if (!req) {
3033 report("Unknown run request");
3034 return;
3035 }
3036
3037 if (format_argv(argv, req->argv, FORMAT_ALL))
3038 open_external_viewer(argv, NULL);
3039 free_argv(argv);
3040 }
3041
3042 /*
3043 * User request switch noodle
3044 */
3045
3046 static int
3047 view_driver(struct view *view, enum request request)
3048 {
3049 int i;
3050
3051 if (request == REQ_NONE) {
3052 doupdate();
3053 return TRUE;
3054 }
3055
3056 if (request > REQ_NONE) {
3057 open_run_request(request);
3058 /* FIXME: When all views can refresh always do this. */
3059 if (view == VIEW(REQ_VIEW_STATUS) ||
3060 view == VIEW(REQ_VIEW_MAIN) ||
3061 view == VIEW(REQ_VIEW_LOG) ||
3062 view == VIEW(REQ_VIEW_STAGE))
3063 request = REQ_REFRESH;
3064 else
3065 return TRUE;
3066 }
3067
3068 if (view && view->lines) {
3069 request = view->ops->request(view, request, &view->line[view->lineno]);
3070 if (request == REQ_NONE)
3071 return TRUE;
3072 }
3073
3074 switch (request) {
3075 case REQ_MOVE_UP:
3076 case REQ_MOVE_DOWN:
3077 case REQ_MOVE_PAGE_UP:
3078 case REQ_MOVE_PAGE_DOWN:
3079 case REQ_MOVE_FIRST_LINE:
3080 case REQ_MOVE_LAST_LINE:
3081 move_view(view, request);
3082 break;
3083
3084 case REQ_SCROLL_LINE_DOWN:
3085 case REQ_SCROLL_LINE_UP:
3086 case REQ_SCROLL_PAGE_DOWN:
3087 case REQ_SCROLL_PAGE_UP:
3088 scroll_view(view, request);
3089 break;
3090
3091 case REQ_VIEW_BLAME:
3092 if (!opt_file[0]) {
3093 report("No file chosen, press %s to open tree view",
3094 get_key(REQ_VIEW_TREE));
3095 break;
3096 }
3097 open_view(view, request, OPEN_DEFAULT);
3098 break;
3099
3100 case REQ_VIEW_BLOB:
3101 if (!ref_blob[0]) {
3102 report("No file chosen, press %s to open tree view",
3103 get_key(REQ_VIEW_TREE));
3104 break;
3105 }
3106 open_view(view, request, OPEN_DEFAULT);
3107 break;
3108
3109 case REQ_VIEW_PAGER:
3110 if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
3111 report("No pager content, press %s to run command from prompt",
3112 get_key(REQ_PROMPT));
3113 break;
3114 }
3115 open_view(view, request, OPEN_DEFAULT);
3116 break;
3117
3118 case REQ_VIEW_STAGE:
3119 if (!VIEW(REQ_VIEW_STAGE)->lines) {
3120 report("No stage content, press %s to open the status view and choose file",
3121 get_key(REQ_VIEW_STATUS));
3122 break;
3123 }
3124 open_view(view, request, OPEN_DEFAULT);
3125 break;
3126
3127 case REQ_VIEW_STATUS:
3128 if (opt_is_inside_work_tree == FALSE) {
3129 report("The status view requires a working tree");
3130 break;
3131 }
3132 open_view(view, request, OPEN_DEFAULT);
3133 break;
3134
3135 case REQ_VIEW_MAIN:
3136 case REQ_VIEW_DIFF:
3137 case REQ_VIEW_LOG:
3138 case REQ_VIEW_TREE:
3139 case REQ_VIEW_HELP:
3140 open_view(view, request, OPEN_DEFAULT);
3141 break;
3142
3143 case REQ_NEXT:
3144 case REQ_PREVIOUS:
3145 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
3146
3147 if ((view == VIEW(REQ_VIEW_DIFF) &&
3148 view->parent == VIEW(REQ_VIEW_MAIN)) ||
3149 (view == VIEW(REQ_VIEW_DIFF) &&
3150 view->parent == VIEW(REQ_VIEW_BLAME)) ||
3151 (view == VIEW(REQ_VIEW_STAGE) &&
3152 view->parent == VIEW(REQ_VIEW_STATUS)) ||
3153 (view == VIEW(REQ_VIEW_BLOB) &&
3154 view->parent == VIEW(REQ_VIEW_TREE))) {
3155 int line;
3156
3157 view = view->parent;
3158 line = view->lineno;
3159 move_view(view, request);
3160 if (view_is_displayed(view))
3161 update_view_title(view);
3162 if (line != view->lineno)
3163 view->ops->request(view, REQ_ENTER,
3164 &view->line[view->lineno]);
3165
3166 } else {
3167 move_view(view, request);
3168 }
3169 break;
3170
3171 case REQ_VIEW_NEXT:
3172 {
3173 int nviews = displayed_views();
3174 int next_view = (current_view + 1) % nviews;
3175
3176 if (next_view == current_view) {
3177 report("Only one view is displayed");
3178 break;
3179 }
3180
3181 current_view = next_view;
3182 /* Blur out the title of the previous view. */
3183 update_view_title(view);
3184 report("");
3185 break;
3186 }
3187 case REQ_REFRESH:
3188 report("Refreshing is not yet supported for the %s view", view->name);
3189 break;
3190
3191 case REQ_MAXIMIZE:
3192 if (displayed_views() == 2)
3193 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
3194 break;
3195
3196 case REQ_TOGGLE_LINENO:
3197 toggle_view_option(&opt_line_number, "line numbers");
3198 break;
3199
3200 case REQ_TOGGLE_DATE:
3201 toggle_view_option(&opt_date, "date display");
3202 break;
3203
3204 case REQ_TOGGLE_AUTHOR:
3205 toggle_view_option(&opt_author, "author display");
3206 break;
3207
3208 case REQ_TOGGLE_REV_GRAPH:
3209 toggle_view_option(&opt_rev_graph, "revision graph display");
3210 break;
3211
3212 case REQ_TOGGLE_REFS:
3213 toggle_view_option(&opt_show_refs, "reference display");
3214 break;
3215
3216 case REQ_SEARCH:
3217 case REQ_SEARCH_BACK:
3218 search_view(view, request);
3219 break;
3220
3221 case REQ_FIND_NEXT:
3222 case REQ_FIND_PREV:
3223 find_next(view, request);
3224 break;
3225
3226 case REQ_STOP_LOADING:
3227 for (i = 0; i < ARRAY_SIZE(views); i++) {
3228 view = &views[i];
3229 if (view->pipe)
3230 report("Stopped loading the %s view", view->name),
3231 end_update(view, TRUE);
3232 }
3233 break;
3234
3235 case REQ_SHOW_VERSION:
3236 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3237 return TRUE;
3238
3239 case REQ_SCREEN_REDRAW:
3240 redraw_display(TRUE);
3241 break;
3242
3243 case REQ_EDIT:
3244 report("Nothing to edit");
3245 break;
3246
3247 case REQ_ENTER:
3248 report("Nothing to enter");
3249 break;
3250
3251 case REQ_VIEW_CLOSE:
3252 /* XXX: Mark closed views by letting view->parent point to the
3253 * view itself. Parents to closed view should never be
3254 * followed. */
3255 if (view->parent &&
3256 view->parent->parent != view->parent) {
3257 memset(display, 0, sizeof(display));
3258 current_view = 0;
3259 display[current_view] = view->parent;
3260 view->parent = view;
3261 resize_display();
3262 redraw_display(FALSE);
3263 report("");
3264 break;
3265 }
3266 /* Fall-through */
3267 case REQ_QUIT:
3268 return FALSE;
3269
3270 default:
3271 report("Unknown key, press 'h' for help");
3272 return TRUE;
3273 }
3274
3275 return TRUE;
3276 }
3277
3278
3279 /*
3280 * View backend utilities
3281 */
3282
3283 /* Parse author lines where the name may be empty:
3284 * author <email@address.tld> 1138474660 +0100
3285 */
3286 static void
3287 parse_author_line(char *ident, char *author, size_t authorsize, struct tm *tm)
3288 {
3289 char *nameend = strchr(ident, '<');
3290 char *emailend = strchr(ident, '>');
3291
3292 if (nameend && emailend)
3293 *nameend = *emailend = 0;
3294 ident = chomp_string(ident);
3295 if (!*ident) {
3296 if (nameend)
3297 ident = chomp_string(nameend + 1);
3298 if (!*ident)
3299 ident = "Unknown";
3300 }
3301
3302 string_ncopy_do(author, authorsize, ident, strlen(ident));
3303
3304 /* Parse epoch and timezone */
3305 if (emailend && emailend[1] == ' ') {
3306 char *secs = emailend + 2;
3307 char *zone = strchr(secs, ' ');
3308 time_t time = (time_t) atol(secs);
3309
3310 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3311 long tz;
3312
3313 zone++;
3314 tz = ('0' - zone[1]) * 60 * 60 * 10;
3315 tz += ('0' - zone[2]) * 60 * 60;
3316 tz += ('0' - zone[3]) * 60;
3317 tz += ('0' - zone[4]) * 60;
3318
3319 if (zone[0] == '-')
3320 tz = -tz;
3321
3322 time -= tz;
3323 }
3324
3325 gmtime_r(&time, tm);
3326 }
3327 }
3328
3329 static enum input_status
3330 select_commit_parent_handler(void *data, char *buf, int c)
3331 {
3332 size_t parents = *(size_t *) data;
3333 int parent = 0;
3334
3335 if (!isdigit(c))
3336 return INPUT_SKIP;
3337
3338 if (*buf)
3339 parent = atoi(buf) * 10;
3340 parent += c - '0';
3341
3342 if (parent > parents)
3343 return INPUT_SKIP;
3344 return INPUT_OK;
3345 }
3346
3347 static bool
3348 select_commit_parent(const char *id, char rev[SIZEOF_REV])
3349 {
3350 char buf[SIZEOF_STR * 4];
3351 const char *revlist_argv[] = {
3352 "git", "rev-list", "-1", "--parents", id, NULL
3353 };
3354 int parents;
3355
3356 if (!run_io_buf(revlist_argv, buf, sizeof(buf)) ||
3357 !*chomp_string(buf) ||
3358 (parents = (strlen(buf) / 40) - 1) < 0) {
3359 report("Failed to get parent information");
3360 return FALSE;
3361
3362 } else if (parents == 0) {
3363 report("The selected commit has no parents");
3364 return FALSE;
3365 }
3366
3367 if (parents > 1) {
3368 char prompt[SIZEOF_STR];
3369 char *result;
3370
3371 if (!string_format(prompt, "Which parent? [1..%d] ", parents))
3372 return FALSE;
3373 result = prompt_input(prompt, select_commit_parent_handler, &parents);
3374 if (!result)
3375 return FALSE;
3376 parents = atoi(result);
3377 }
3378
3379 string_copy_rev(rev, &buf[41 * parents]);
3380 return TRUE;
3381 }
3382
3383 /*
3384 * Pager backend
3385 */
3386
3387 static bool
3388 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3389 {
3390 char *text = line->data;
3391
3392 if (opt_line_number && draw_lineno(view, lineno))
3393 return TRUE;
3394
3395 draw_text(view, line->type, text, TRUE);
3396 return TRUE;
3397 }
3398
3399 static bool
3400 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3401 {
3402 const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3403 char refbuf[SIZEOF_STR];
3404 char *ref = NULL;
3405
3406 if (run_io_buf(describe_argv, refbuf, sizeof(refbuf)))
3407 ref = chomp_string(refbuf);
3408
3409 if (!ref || !*ref)
3410 return TRUE;
3411
3412 /* This is the only fatal call, since it can "corrupt" the buffer. */
3413 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3414 return FALSE;
3415
3416 return TRUE;
3417 }
3418
3419 static void
3420 add_pager_refs(struct view *view, struct line *line)
3421 {
3422 char buf[SIZEOF_STR];
3423 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3424 struct ref **refs;
3425 size_t bufpos = 0, refpos = 0;
3426 const char *sep = "Refs: ";
3427 bool is_tag = FALSE;
3428
3429 assert(line->type == LINE_COMMIT);
3430
3431 refs = get_refs(commit_id);
3432 if (!refs) {
3433 if (view == VIEW(REQ_VIEW_DIFF))
3434 goto try_add_describe_ref;
3435 return;
3436 }
3437
3438 do {
3439 struct ref *ref = refs[refpos];
3440 const char *fmt = ref->tag ? "%s[%s]" :
3441 ref->remote ? "%s<%s>" : "%s%s";
3442
3443 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3444 return;
3445 sep = ", ";
3446 if (ref->tag)
3447 is_tag = TRUE;
3448 } while (refs[refpos++]->next);
3449
3450 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
3451 try_add_describe_ref:
3452 /* Add <tag>-g<commit_id> "fake" reference. */
3453 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3454 return;
3455 }
3456
3457 if (bufpos == 0)
3458 return;
3459
3460 add_line_text(view, buf, LINE_PP_REFS);
3461 }
3462
3463 static bool
3464 pager_read(struct view *view, char *data)
3465 {
3466 struct line *line;
3467
3468 if (!data)
3469 return TRUE;
3470
3471 line = add_line_text(view, data, get_line_type(data));
3472 if (!line)
3473 return FALSE;
3474
3475 if (line->type == LINE_COMMIT &&
3476 (view == VIEW(REQ_VIEW_DIFF) ||
3477 view == VIEW(REQ_VIEW_LOG)))
3478 add_pager_refs(view, line);
3479
3480 return TRUE;
3481 }
3482
3483 static enum request
3484 pager_request(struct view *view, enum request request, struct line *line)
3485 {
3486 int split = 0;
3487
3488 if (request != REQ_ENTER)
3489 return request;
3490
3491 if (line->type == LINE_COMMIT &&
3492 (view == VIEW(REQ_VIEW_LOG) ||
3493 view == VIEW(REQ_VIEW_PAGER))) {
3494 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3495 split = 1;
3496 }
3497
3498 /* Always scroll the view even if it was split. That way
3499 * you can use Enter to scroll through the log view and
3500 * split open each commit diff. */
3501 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3502
3503 /* FIXME: A minor workaround. Scrolling the view will call report("")
3504 * but if we are scrolling a non-current view this won't properly
3505 * update the view title. */
3506 if (split)
3507 update_view_title(view);
3508
3509 return REQ_NONE;
3510 }
3511
3512 static bool
3513 pager_grep(struct view *view, struct line *line)
3514 {
3515 regmatch_t pmatch;
3516 char *text = line->data;
3517
3518 if (!*text)
3519 return FALSE;
3520
3521 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3522 return FALSE;
3523
3524 return TRUE;
3525 }
3526
3527 static void
3528 pager_select(struct view *view, struct line *line)
3529 {
3530 if (line->type == LINE_COMMIT) {
3531 char *text = (char *)line->data + STRING_SIZE("commit ");
3532
3533 if (view != VIEW(REQ_VIEW_PAGER))
3534 string_copy_rev(view->ref, text);
3535 string_copy_rev(ref_commit, text);
3536 }
3537 }
3538
3539 static struct view_ops pager_ops = {
3540 "line",
3541 NULL,
3542 NULL,
3543 pager_read,
3544 pager_draw,
3545 pager_request,
3546 pager_grep,
3547 pager_select,
3548 };
3549
3550 static const char *log_argv[SIZEOF_ARG] = {
3551 "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3552 };
3553
3554 static enum request
3555 log_request(struct view *view, enum request request, struct line *line)
3556 {
3557 switch (request) {
3558 case REQ_REFRESH:
3559 load_refs();
3560 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3561 return REQ_NONE;
3562 default:
3563 return pager_request(view, request, line);
3564 }
3565 }
3566
3567 static struct view_ops log_ops = {
3568 "line",
3569 log_argv,
3570 NULL,
3571 pager_read,
3572 pager_draw,
3573 log_request,
3574 pager_grep,
3575 pager_select,
3576 };
3577
3578 static const char *diff_argv[SIZEOF_ARG] = {
3579 "git", "show", "--pretty=fuller", "--no-color", "--root",
3580 "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
3581 };
3582
3583 static struct view_ops diff_ops = {
3584 "line",
3585 diff_argv,
3586 NULL,
3587 pager_read,
3588 pager_draw,
3589 pager_request,
3590 pager_grep,
3591 pager_select,
3592 };
3593
3594 /*
3595 * Help backend
3596 */
3597
3598 static bool
3599 help_open(struct view *view)
3600 {
3601 char buf[SIZEOF_STR];
3602 size_t bufpos;
3603 int i;
3604
3605 if (view->lines > 0)
3606 return TRUE;
3607
3608 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3609
3610 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3611 const char *key;
3612
3613 if (req_info[i].request == REQ_NONE)
3614 continue;
3615
3616 if (!req_info[i].request) {
3617 add_line_text(view, "", LINE_DEFAULT);
3618 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3619 continue;
3620 }
3621
3622 key = get_key(req_info[i].request);
3623 if (!*key)
3624 key = "(no key defined)";
3625
3626 for (bufpos = 0; bufpos <= req_info[i].namelen; bufpos++) {
3627 buf[bufpos] = tolower(req_info[i].name[bufpos]);
3628 if (buf[bufpos] == '_')
3629 buf[bufpos] = '-';
3630 }
3631
3632 add_line_format(view, LINE_DEFAULT, " %-25s %-20s %s",
3633 key, buf, req_info[i].help);
3634 }
3635
3636 if (run_requests) {
3637 add_line_text(view, "", LINE_DEFAULT);
3638 add_line_text(view, "External commands:", LINE_DEFAULT);
3639 }
3640
3641 for (i = 0; i < run_requests; i++) {
3642 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3643 const char *key;
3644 int argc;
3645
3646 if (!req)
3647 continue;
3648
3649 key = get_key_name(req->key);
3650 if (!*key)
3651 key = "(no key defined)";
3652
3653 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3654 if (!string_format_from(buf, &bufpos, "%s%s",
3655 argc ? " " : "", req->argv[argc]))
3656 return REQ_NONE;
3657
3658 add_line_format(view, LINE_DEFAULT, " %-10s %-14s `%s`",
3659 keymap_table[req->keymap].name, key, buf);
3660 }
3661
3662 return TRUE;
3663 }
3664
3665 static struct view_ops help_ops = {
3666 "line",
3667 NULL,
3668 help_open,
3669 NULL,
3670 pager_draw,
3671 pager_request,
3672 pager_grep,
3673 pager_select,
3674 };
3675
3676
3677 /*
3678 * Tree backend
3679 */
3680
3681 struct tree_stack_entry {
3682 struct tree_stack_entry *prev; /* Entry below this in the stack */
3683 unsigned long lineno; /* Line number to restore */
3684 char *name; /* Position of name in opt_path */
3685 };
3686
3687 /* The top of the path stack. */
3688 static struct tree_stack_entry *tree_stack = NULL;
3689 unsigned long tree_lineno = 0;
3690
3691 static void
3692 pop_tree_stack_entry(void)
3693 {
3694 struct tree_stack_entry *entry = tree_stack;
3695
3696 tree_lineno = entry->lineno;
3697 entry->name[0] = 0;
3698 tree_stack = entry->prev;
3699 free(entry);
3700 }
3701
3702 static void
3703 push_tree_stack_entry(const char *name, unsigned long lineno)
3704 {
3705 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3706 size_t pathlen = strlen(opt_path);
3707
3708 if (!entry)
3709 return;
3710
3711 entry->prev = tree_stack;
3712 entry->name = opt_path + pathlen;
3713 tree_stack = entry;
3714
3715 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3716 pop_tree_stack_entry();
3717 return;
3718 }
3719
3720 /* Move the current line to the first tree entry. */
3721 tree_lineno = 1;
3722 entry->lineno = lineno;
3723 }
3724
3725 /* Parse output from git-ls-tree(1):
3726 *
3727 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
3728 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
3729 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3730 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
3731 */
3732
3733 #define SIZEOF_TREE_ATTR \
3734 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
3735
3736 #define SIZEOF_TREE_MODE \
3737 STRING_SIZE("100644 ")
3738
3739 #define TREE_ID_OFFSET \
3740 STRING_SIZE("100644 blob ")
3741
3742 struct tree_entry {
3743 char id[SIZEOF_REV];
3744 mode_t mode;
3745 struct tm time; /* Date from the author ident. */
3746 char author[75]; /* Author of the commit. */
3747 char name[1];
3748 };
3749
3750 static const char *
3751 tree_path(struct line *line)
3752 {
3753 return ((struct tree_entry *) line->data)->name;
3754 }
3755
3756
3757 static int
3758 tree_compare_entry(struct line *line1, struct line *line2)
3759 {
3760 if (line1->type != line2->type)
3761 return line1->type == LINE_TREE_DIR ? -1 : 1;
3762 return strcmp(tree_path(line1), tree_path(line2));
3763 }
3764
3765 static struct line *
3766 tree_entry(struct view *view, enum line_type type, const char *path,
3767 const char *mode, const char *id)
3768 {
3769 struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
3770 struct line *line = entry ? add_line_data(view, entry, type) : NULL;
3771
3772 if (!entry || !line) {
3773 free(entry);
3774 return NULL;
3775 }
3776
3777 strncpy(entry->name, path, strlen(path));
3778 if (mode)
3779 entry->mode = strtoul(mode, NULL, 8);
3780 if (id)
3781 string_copy_rev(entry->id, id);
3782
3783 return line;
3784 }
3785
3786 static bool
3787 tree_read_date(struct view *view, char *text, bool *read_date)
3788 {
3789 static char author_name[SIZEOF_STR];
3790 static struct tm author_time;
3791
3792 if (!text && *read_date) {
3793 *read_date = FALSE;
3794 return TRUE;
3795
3796 } else if (!text) {
3797 char *path = *opt_path ? opt_path : ".";
3798 /* Find next entry to process */
3799 const char *log_file[] = {
3800 "git", "log", "--no-color", "--pretty=raw",
3801 "--cc", "--raw", view->id, "--", path, NULL
3802 };
3803 struct io io = {};
3804
3805 if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
3806 report("Failed to load tree data");
3807 return TRUE;
3808 }
3809
3810 done_io(view->pipe);
3811 view->io = io;
3812 *read_date = TRUE;
3813 return FALSE;
3814
3815 } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
3816 parse_author_line(text + STRING_SIZE("author "),
3817 author_name, sizeof(author_name), &author_time);
3818
3819 } else if (*text == ':') {
3820 char *pos;
3821 size_t annotated = 1;
3822 size_t i;
3823
3824 pos = strchr(text, '\t');
3825 if (!pos)
3826 return TRUE;
3827 text = pos + 1;
3828 if (*opt_prefix && !strncmp(text, opt_prefix, strlen(opt_prefix)))
3829 text += strlen(opt_prefix);
3830 if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
3831 text += strlen(opt_path);
3832 pos = strchr(text, '/');
3833 if (pos)
3834 *pos = 0;
3835
3836 for (i = 1; i < view->lines; i++) {
3837 struct line *line = &view->line[i];
3838 struct tree_entry *entry = line->data;
3839
3840 annotated += !!*entry->author;
3841 if (*entry->author || strcmp(entry->name, text))
3842 continue;
3843
3844 string_copy(entry->author, author_name);
3845 memcpy(&entry->time, &author_time, sizeof(entry->time));
3846 line->dirty = 1;
3847 break;
3848 }
3849
3850 if (annotated == view->lines)
3851 kill_io(view->pipe);
3852 }
3853 return TRUE;
3854 }
3855
3856 static bool
3857 tree_read(struct view *view, char *text)
3858 {
3859 static bool read_date = FALSE;
3860 struct tree_entry *data;
3861 struct line *entry, *line;
3862 enum line_type type;
3863 size_t textlen = text ? strlen(text) : 0;
3864 char *path = text + SIZEOF_TREE_ATTR;
3865
3866 if (read_date || !text)
3867 return tree_read_date(view, text, &read_date);
3868
3869 if (textlen <= SIZEOF_TREE_ATTR)
3870 return FALSE;
3871 if (view->lines == 0 &&
3872 !tree_entry(view, LINE_TREE_PARENT, opt_path, NULL, NULL))
3873 return FALSE;
3874
3875 /* Strip the path part ... */
3876 if (*opt_path) {
3877 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3878 size_t striplen = strlen(opt_path);
3879
3880 if (pathlen > striplen)
3881 memmove(path, path + striplen,
3882 pathlen - striplen + 1);
3883
3884 /* Insert "link" to parent directory. */
3885 if (view->lines == 1 &&
3886 !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
3887 return FALSE;
3888 }
3889
3890 type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
3891 entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
3892 if (!entry)
3893 return FALSE;
3894 data = entry->data;
3895
3896 /* Skip "Directory ..." and ".." line. */
3897 for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
3898 if (tree_compare_entry(line, entry) <= 0)
3899 continue;
3900
3901 memmove(line + 1, line, (entry - line) * sizeof(*entry));
3902
3903 line->data = data;
3904 line->type = type;
3905 for (; line <= entry; line++)
3906 line->dirty = line->cleareol = 1;
3907 return TRUE;
3908 }
3909
3910 if (tree_lineno > view->lineno) {
3911 view->lineno = tree_lineno;
3912 tree_lineno = 0;
3913 }
3914
3915 return TRUE;
3916 }
3917
3918 static bool
3919 tree_draw(struct view *view, struct line *line, unsigned int lineno)
3920 {
3921 struct tree_entry *entry = line->data;
3922
3923 if (line->type == LINE_TREE_PARENT) {
3924 if (draw_text(view, line->type, "Directory path /", TRUE))
3925 return TRUE;
3926 } else {
3927 char mode[11] = "-r--r--r--";
3928
3929 if (S_ISDIR(entry->mode)) {
3930 mode[3] = mode[6] = mode[9] = 'x';
3931 mode[0] = 'd';
3932 }
3933 if (S_ISLNK(entry->mode))
3934 mode[0] = 'l';
3935 if (entry->mode & S_IWUSR)
3936 mode[2] = 'w';
3937 if (entry->mode & S_IXUSR)
3938 mode[3] = 'x';
3939 if (entry->mode & S_IXGRP)
3940 mode[6] = 'x';
3941 if (entry->mode & S_IXOTH)
3942 mode[9] = 'x';
3943 if (draw_field(view, LINE_TREE_MODE, mode, 11, TRUE))
3944 return TRUE;
3945
3946 if (opt_author && draw_author(view, entry->author))
3947 return TRUE;
3948
3949 if (opt_date && draw_date(view, *entry->author ? &entry->time : NULL))
3950 return TRUE;
3951 }
3952 if (draw_text(view, line->type, entry->name, TRUE))
3953 return TRUE;
3954 return TRUE;
3955 }
3956
3957 static void
3958 open_blob_editor()
3959 {
3960 char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
3961 int fd = mkstemp(file);
3962
3963 if (fd == -1)
3964 report("Failed to create temporary file");
3965 else if (!run_io_append(blob_ops.argv, FORMAT_ALL, fd))
3966 report("Failed to save blob data to file");
3967 else
3968 open_editor(FALSE, file);
3969 if (fd != -1)
3970 unlink(file);
3971 }
3972
3973 static enum request
3974 tree_request(struct view *view, enum request request, struct line *line)
3975 {
3976 enum open_flags flags;
3977
3978 switch (request) {
3979 case REQ_VIEW_BLAME:
3980 if (line->type != LINE_TREE_FILE) {
3981 report("Blame only supported for files");
3982 return REQ_NONE;
3983 }
3984
3985 string_copy(opt_ref, view->vid);
3986 return request;
3987
3988 case REQ_EDIT:
3989 if (line->type != LINE_TREE_FILE) {
3990 report("Edit only supported for files");
3991 } else if (!is_head_commit(view->vid)) {
3992 open_blob_editor();
3993 } else {
3994 open_editor(TRUE, opt_file);
3995 }
3996 return REQ_NONE;
3997
3998 case REQ_PARENT:
3999 if (!*opt_path) {
4000 /* quit view if at top of tree */
4001 return REQ_VIEW_CLOSE;
4002 }
4003 /* fake 'cd ..' */
4004 line = &view->line[1];
4005 break;
4006
4007 case REQ_ENTER:
4008 break;
4009
4010 default:
4011 return request;
4012 }
4013
4014 /* Cleanup the stack if the tree view is at a different tree. */
4015 while (!*opt_path && tree_stack)
4016 pop_tree_stack_entry();
4017
4018 switch (line->type) {
4019 case LINE_TREE_DIR:
4020 /* Depending on whether it is a subdir or parent (updir?) link
4021 * mangle the path buffer. */
4022 if (line == &view->line[1] && *opt_path) {
4023 pop_tree_stack_entry();
4024
4025 } else {
4026 const char *basename = tree_path(line);
4027
4028 push_tree_stack_entry(basename, view->lineno);
4029 }
4030
4031 /* Trees and subtrees share the same ID, so they are not not
4032 * unique like blobs. */
4033 flags = OPEN_RELOAD;
4034 request = REQ_VIEW_TREE;
4035 break;
4036
4037 case LINE_TREE_FILE:
4038 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4039 request = REQ_VIEW_BLOB;
4040 break;
4041
4042 default:
4043 return REQ_NONE;
4044 }
4045
4046 open_view(view, request, flags);
4047 if (request == REQ_VIEW_TREE)
4048 view->lineno = tree_lineno;
4049
4050 return REQ_NONE;
4051 }
4052
4053 static void
4054 tree_select(struct view *view, struct line *line)
4055 {
4056 struct tree_entry *entry = line->data;
4057
4058 if (line->type == LINE_TREE_FILE) {
4059 string_copy_rev(ref_blob, entry->id);
4060 string_format(opt_file, "%s%s", opt_path, tree_path(line));
4061
4062 } else if (line->type != LINE_TREE_DIR) {
4063 return;
4064 }
4065
4066 string_copy_rev(view->ref, entry->id);
4067 }
4068
4069 static const char *tree_argv[SIZEOF_ARG] = {
4070 "git", "ls-tree", "%(commit)", "%(directory)", NULL
4071 };
4072
4073 static struct view_ops tree_ops = {
4074 "file",
4075 tree_argv,
4076 NULL,
4077 tree_read,
4078 tree_draw,
4079 tree_request,
4080 pager_grep,
4081 tree_select,
4082 };
4083
4084 static bool
4085 blob_read(struct view *view, char *line)
4086 {
4087 if (!line)
4088 return TRUE;
4089 return add_line_text(view, line, LINE_DEFAULT) != NULL;
4090 }
4091
4092 static enum request
4093 blob_request(struct view *view, enum request request, struct line *line)
4094 {
4095 switch (request) {
4096 case REQ_EDIT:
4097 open_blob_editor();
4098 return REQ_NONE;
4099 default:
4100 return pager_request(view, request, line);
4101 }
4102 }
4103
4104 static const char *blob_argv[SIZEOF_ARG] = {
4105 "git", "cat-file", "blob", "%(blob)", NULL
4106 };
4107
4108 static struct view_ops blob_ops = {
4109 "line",
4110 blob_argv,
4111 NULL,
4112 blob_read,
4113 pager_draw,
4114 blob_request,
4115 pager_grep,
4116 pager_select,
4117 };
4118
4119 /*
4120 * Blame backend
4121 *
4122 * Loading the blame view is a two phase job:
4123 *
4124 * 1. File content is read either using opt_file from the
4125 * filesystem or using git-cat-file.
4126 * 2. Then blame information is incrementally added by
4127 * reading output from git-blame.
4128 */
4129
4130 static const char *blame_head_argv[] = {
4131 "git", "blame", "--incremental", "--", "%(file)", NULL
4132 };
4133
4134 static const char *blame_ref_argv[] = {
4135 "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
4136 };
4137
4138 static const char *blame_cat_file_argv[] = {
4139 "git", "cat-file", "blob", "%(ref):%(file)", NULL
4140 };
4141
4142 struct blame_commit {
4143 char id[SIZEOF_REV]; /* SHA1 ID. */
4144 char title[128]; /* First line of the commit message. */
4145 char author[75]; /* Author of the commit. */
4146 struct tm time; /* Date from the author ident. */
4147 char filename[128]; /* Name of file. */
4148 bool has_previous; /* Was a "previous" line detected. */
4149 };
4150
4151 struct blame {
4152 struct blame_commit *commit;
4153 char text[1];
4154 };
4155
4156 static bool
4157 blame_open(struct view *view)
4158 {
4159 if (*opt_ref || !io_open(&view->io, opt_file)) {
4160 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
4161 return FALSE;
4162 }
4163
4164 setup_update(view, opt_file);
4165 string_format(view->ref, "%s ...", opt_file);
4166
4167 return TRUE;
4168 }
4169
4170 static struct blame_commit *
4171 get_blame_commit(struct view *view, const char *id)
4172 {
4173 size_t i;
4174
4175 for (i = 0; i < view->lines; i++) {
4176 struct blame *blame = view->line[i].data;
4177
4178 if (!blame->commit)
4179 continue;
4180
4181 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4182 return blame->commit;
4183 }
4184
4185 {
4186 struct blame_commit *commit = calloc(1, sizeof(*commit));
4187
4188 if (commit)
4189 string_ncopy(commit->id, id, SIZEOF_REV);
4190 return commit;
4191 }
4192 }
4193
4194 static bool
4195 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4196 {
4197 const char *pos = *posref;
4198
4199 *posref = NULL;
4200 pos = strchr(pos + 1, ' ');
4201 if (!pos || !isdigit(pos[1]))
4202 return FALSE;
4203 *number = atoi(pos + 1);
4204 if (*number < min || *number > max)
4205 return FALSE;
4206
4207 *posref = pos;
4208 return TRUE;
4209 }
4210
4211 static struct blame_commit *
4212 parse_blame_commit(struct view *view, const char *text, int *blamed)
4213 {
4214 struct blame_commit *commit;
4215 struct blame *blame;
4216 const char *pos = text + SIZEOF_REV - 1;
4217 size_t lineno;
4218 size_t group;
4219
4220 if (strlen(text) <= SIZEOF_REV || *pos != ' ')
4221 return NULL;
4222
4223 if (!parse_number(&pos, &lineno, 1, view->lines) ||
4224 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4225 return NULL;
4226
4227 commit = get_blame_commit(view, text);
4228 if (!commit)
4229 return NULL;
4230
4231 *blamed += group;
4232 while (group--) {
4233 struct line *line = &view->line[lineno + group - 1];
4234
4235 blame = line->data;
4236 blame->commit = commit;
4237 line->dirty = 1;
4238 }
4239
4240 return commit;
4241 }
4242
4243 static bool
4244 blame_read_file(struct view *view, const char *line, bool *read_file)
4245 {
4246 if (!line) {
4247 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
4248 struct io io = {};
4249
4250 if (view->lines == 0 && !view->parent)
4251 die("No blame exist for %s", view->vid);
4252
4253 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
4254 report("Failed to load blame data");
4255 return TRUE;
4256 }
4257
4258 done_io(view->pipe);
4259 view->io = io;
4260 *read_file = FALSE;
4261 return FALSE;
4262
4263 } else {
4264 size_t linelen = strlen(line);
4265 struct blame *blame = malloc(sizeof(*blame) + linelen);
4266
4267 blame->commit = NULL;
4268 strncpy(blame->text, line, linelen);
4269 blame->text[linelen] = 0;
4270 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4271 }
4272 }
4273
4274 static bool
4275 match_blame_header(const char *name, char **line)
4276 {
4277 size_t namelen = strlen(name);
4278 bool matched = !strncmp(name, *line, namelen);
4279
4280 if (matched)
4281 *line += namelen;
4282
4283 return matched;
4284 }
4285
4286 static bool
4287 blame_read(struct view *view, char *line)
4288 {
4289 static struct blame_commit *commit = NULL;
4290 static int blamed = 0;
4291 static time_t author_time;
4292 static bool read_file = TRUE;
4293
4294 if (read_file)
4295 return blame_read_file(view, line, &read_file);
4296
4297 if (!line) {
4298 /* Reset all! */
4299 commit = NULL;
4300 blamed = 0;
4301 read_file = TRUE;
4302 string_format(view->ref, "%s", view->vid);
4303 if (view_is_displayed(view)) {
4304 update_view_title(view);
4305 redraw_view_from(view, 0);
4306 }
4307 return TRUE;
4308 }
4309
4310 if (!commit) {
4311 commit = parse_blame_commit(view, line, &blamed);
4312 string_format(view->ref, "%s %2d%%", view->vid,
4313 view->lines ? blamed * 100 / view->lines : 0);
4314
4315 } else if (match_blame_header("author ", &line)) {
4316 string_ncopy(commit->author, line, strlen(line));
4317
4318 } else if (match_blame_header("author-time ", &line)) {
4319 author_time = (time_t) atol(line);
4320
4321 } else if (match_blame_header("author-tz ", &line)) {
4322 long tz;
4323
4324 tz = ('0' - line[1]) * 60 * 60 * 10;
4325 tz += ('0' - line[2]) * 60 * 60;
4326 tz += ('0' - line[3]) * 60;
4327 tz += ('0' - line[4]) * 60;
4328
4329 if (line[0] == '-')
4330 tz = -tz;
4331
4332 author_time -= tz;
4333 gmtime_r(&author_time, &commit->time);
4334
4335 } else if (match_blame_header("summary ", &line)) {
4336 string_ncopy(commit->title, line, strlen(line));
4337
4338 } else if (match_blame_header("previous ", &line)) {
4339 commit->has_previous = TRUE;
4340
4341 } else if (match_blame_header("filename ", &line)) {
4342 string_ncopy(commit->filename, line, strlen(line));
4343 commit = NULL;
4344 }
4345
4346 return TRUE;
4347 }
4348
4349 static bool
4350 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4351 {
4352 struct blame *blame = line->data;
4353 struct tm *time = NULL;
4354 const char *id = NULL, *author = NULL;
4355
4356 if (blame->commit && *blame->commit->filename) {
4357 id = blame->commit->id;
4358 author = blame->commit->author;
4359 time = &blame->commit->time;
4360 }
4361
4362 if (opt_date && draw_date(view, time))
4363 return TRUE;
4364
4365 if (opt_author && draw_author(view, author))
4366 return TRUE;
4367
4368 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4369 return TRUE;
4370
4371 if (draw_lineno(view, lineno))
4372 return TRUE;
4373
4374 draw_text(view, LINE_DEFAULT, blame->text, TRUE);
4375 return TRUE;
4376 }
4377
4378 static bool
4379 check_blame_commit(struct blame *blame)
4380 {
4381 if (!blame->commit)
4382 report("Commit data not loaded yet");
4383 else if (!strcmp(blame->commit->id, NULL_ID))
4384 report("No commit exist for the selected line");
4385 else
4386 return TRUE;
4387 return FALSE;
4388 }
4389
4390 static enum request
4391 blame_request(struct view *view, enum request request, struct line *line)
4392 {
4393 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4394 struct blame *blame = line->data;
4395
4396 switch (request) {
4397 case REQ_VIEW_BLAME:
4398 if (check_blame_commit(blame)) {
4399 string_copy(opt_ref, blame->commit->id);
4400 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4401 }
4402 break;
4403
4404 case REQ_PARENT:
4405 if (check_blame_commit(blame) &&
4406 select_commit_parent(blame->commit->id, opt_ref))
4407 open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4408 break;
4409
4410 case REQ_ENTER:
4411 if (!blame->commit) {
4412 report("No commit loaded yet");
4413 break;
4414 }
4415
4416 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4417 !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4418 break;
4419
4420 if (!strcmp(blame->commit->id, NULL_ID)) {
4421 struct view *diff = VIEW(REQ_VIEW_DIFF);
4422 const char *diff_index_argv[] = {
4423 "git", "diff-index", "--root", "--patch-with-stat",
4424 "-C", "-M", "HEAD", "--", view->vid, NULL
4425 };
4426
4427 if (!blame->commit->has_previous) {
4428 diff_index_argv[1] = "diff";
4429 diff_index_argv[2] = "--no-color";
4430 diff_index_argv[6] = "--";
4431 diff_index_argv[7] = "/dev/null";
4432 }
4433
4434 if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4435 report("Failed to allocate diff command");
4436 break;
4437 }
4438 flags |= OPEN_PREPARED;
4439 }
4440
4441 open_view(view, REQ_VIEW_DIFF, flags);
4442 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4443 string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4444 break;
4445
4446 default:
4447 return request;
4448 }
4449
4450 return REQ_NONE;
4451 }
4452
4453 static bool
4454 blame_grep(struct view *view, struct line *line)
4455 {
4456 struct blame *blame = line->data;
4457 struct blame_commit *commit = blame->commit;
4458 regmatch_t pmatch;
4459
4460 #define MATCH(text, on) \
4461 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4462
4463 if (commit) {
4464 char buf[DATE_COLS + 1];
4465
4466 if (MATCH(commit->title, 1) ||
4467 MATCH(commit->author, opt_author) ||
4468 MATCH(commit->id, opt_date))
4469 return TRUE;
4470
4471 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
4472 MATCH(buf, 1))
4473 return TRUE;
4474 }
4475
4476 return MATCH(blame->text, 1);
4477
4478 #undef MATCH
4479 }
4480
4481 static void
4482 blame_select(struct view *view, struct line *line)
4483 {
4484 struct blame *blame = line->data;
4485 struct blame_commit *commit = blame->commit;
4486
4487 if (!commit)
4488 return;
4489
4490 if (!strcmp(commit->id, NULL_ID))
4491 string_ncopy(ref_commit, "HEAD", 4);
4492 else
4493 string_copy_rev(ref_commit, commit->id);
4494 }
4495
4496 static struct view_ops blame_ops = {
4497 "line",
4498 NULL,
4499 blame_open,
4500 blame_read,
4501 blame_draw,
4502 blame_request,
4503 blame_grep,
4504 blame_select,
4505 };
4506
4507 /*
4508 * Status backend
4509 */
4510
4511 struct status {
4512 char status;
4513 struct {
4514 mode_t mode;
4515 char rev[SIZEOF_REV];
4516 char name[SIZEOF_STR];
4517 } old;
4518 struct {
4519 mode_t mode;
4520 char rev[SIZEOF_REV];
4521 char name[SIZEOF_STR];
4522 } new;
4523 };
4524
4525 static char status_onbranch[SIZEOF_STR];
4526 static struct status stage_status;
4527 static enum line_type stage_line_type;
4528 static size_t stage_chunks;
4529 static int *stage_chunk;
4530
4531 /* This should work even for the "On branch" line. */
4532 static inline bool
4533 status_has_none(struct view *view, struct line *line)
4534 {
4535 return line < view->line + view->lines && !line[1].data;
4536 }
4537
4538 /* Get fields from the diff line:
4539 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4540 */
4541 static inline bool
4542 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4543 {
4544 const char *old_mode = buf + 1;
4545 const char *new_mode = buf + 8;
4546 const char *old_rev = buf + 15;
4547 const char *new_rev = buf + 56;
4548 const char *status = buf + 97;
4549
4550 if (bufsize < 98 ||
4551 old_mode[-1] != ':' ||
4552 new_mode[-1] != ' ' ||
4553 old_rev[-1] != ' ' ||
4554 new_rev[-1] != ' ' ||
4555 status[-1] != ' ')
4556 return FALSE;
4557
4558 file->status = *status;
4559
4560 string_copy_rev(file->old.rev, old_rev);
4561 string_copy_rev(file->new.rev, new_rev);
4562
4563 file->old.mode = strtoul(old_mode, NULL, 8);
4564 file->new.mode = strtoul(new_mode, NULL, 8);
4565
4566 file->old.name[0] = file->new.name[0] = 0;
4567
4568 return TRUE;
4569 }
4570
4571 static bool
4572 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4573 {
4574 struct status *file = NULL;
4575 struct status *unmerged = NULL;
4576 char *buf;
4577 struct io io = {};
4578
4579 if (!run_io(&io, argv, NULL, IO_RD))
4580 return FALSE;
4581
4582 add_line_data(view, NULL, type);
4583
4584 while ((buf = io_get(&io, 0, TRUE))) {
4585 if (!file) {
4586 file = calloc(1, sizeof(*file));
4587 if (!file || !add_line_data(view, file, type))
4588 goto error_out;
4589 }
4590
4591 /* Parse diff info part. */
4592 if (status) {
4593 file->status = status;
4594 if (status == 'A')
4595 string_copy(file->old.rev, NULL_ID);
4596
4597 } else if (!file->status) {
4598 if (!status_get_diff(file, buf, strlen(buf)))
4599 goto error_out;
4600
4601 buf = io_get(&io, 0, TRUE);
4602 if (!buf)
4603 break;
4604
4605 /* Collapse all 'M'odified entries that follow a
4606 * associated 'U'nmerged entry. */
4607 if (file->status == 'U') {
4608 unmerged = file;
4609
4610 } else if (unmerged) {
4611 int collapse = !strcmp(buf, unmerged->new.name);
4612
4613 unmerged = NULL;
4614 if (collapse) {
4615 free(file);
4616 file = NULL;
4617 view->lines--;
4618 continue;
4619 }
4620 }
4621 }
4622
4623 /* Grab the old name for rename/copy. */
4624 if (!*file->old.name &&
4625 (file->status == 'R' || file->status == 'C')) {
4626 string_ncopy(file->old.name, buf, strlen(buf));
4627
4628 buf = io_get(&io, 0, TRUE);
4629 if (!buf)
4630 break;
4631 }
4632
4633 /* git-ls-files just delivers a NUL separated list of
4634 * file names similar to the second half of the
4635 * git-diff-* output. */
4636 string_ncopy(file->new.name, buf, strlen(buf));
4637 if (!*file->old.name)
4638 string_copy(file->old.name, file->new.name);
4639 file = NULL;
4640 }
4641
4642 if (io_error(&io)) {
4643 error_out:
4644 done_io(&io);
4645 return FALSE;
4646 }
4647
4648 if (!view->line[view->lines - 1].data)
4649 add_line_data(view, NULL, LINE_STAT_NONE);
4650
4651 done_io(&io);
4652 return TRUE;
4653 }
4654
4655 /* Don't show unmerged entries in the staged section. */
4656 static const char *status_diff_index_argv[] = {
4657 "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
4658 "--cached", "-M", "HEAD", NULL
4659 };
4660
4661 static const char *status_diff_files_argv[] = {
4662 "git", "diff-files", "-z", NULL
4663 };
4664
4665 static const char *status_list_other_argv[] = {
4666 "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
4667 };
4668
4669 static const char *status_list_no_head_argv[] = {
4670 "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
4671 };
4672
4673 static const char *update_index_argv[] = {
4674 "git", "update-index", "-q", "--unmerged", "--refresh", NULL
4675 };
4676
4677 /* Restore the previous line number to stay in the context or select a
4678 * line with something that can be updated. */
4679 static void
4680 status_restore(struct view *view)
4681 {
4682 if (view->p_lineno >= view->lines)
4683 view->p_lineno = view->lines - 1;
4684 while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
4685 view->p_lineno++;
4686 while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
4687 view->p_lineno--;
4688
4689 /* If the above fails, always skip the "On branch" line. */
4690 if (view->p_lineno < view->lines)
4691 view->lineno = view->p_lineno;
4692 else
4693 view->lineno = 1;
4694
4695 if (view->lineno < view->offset)
4696 view->offset = view->lineno;
4697 else if (view->offset + view->height <= view->lineno)
4698 view->offset = view->lineno - view->height + 1;
4699
4700 view->p_restore = FALSE;
4701 }
4702
4703 /* First parse staged info using git-diff-index(1), then parse unstaged
4704 * info using git-diff-files(1), and finally untracked files using
4705 * git-ls-files(1). */
4706 static bool
4707 status_open(struct view *view)
4708 {
4709 reset_view(view);
4710
4711 add_line_data(view, NULL, LINE_STAT_HEAD);
4712 if (is_initial_commit())
4713 string_copy(status_onbranch, "Initial commit");
4714 else if (!*opt_head)
4715 string_copy(status_onbranch, "Not currently on any branch");
4716 else if (!string_format(status_onbranch, "On branch %s", opt_head))
4717 return FALSE;
4718
4719 run_io_bg(update_index_argv);
4720
4721 if (is_initial_commit()) {
4722 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
4723 return FALSE;
4724 } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
4725 return FALSE;
4726 }
4727
4728 if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
4729 !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
4730 return FALSE;
4731
4732 /* Restore the exact position or use the specialized restore
4733 * mode? */
4734 if (!view->p_restore)
4735 status_restore(view);
4736 return TRUE;
4737 }
4738
4739 static bool
4740 status_draw(struct view *view, struct line *line, unsigned int lineno)
4741 {
4742 struct status *status = line->data;
4743 enum line_type type;
4744 const char *text;
4745
4746 if (!status) {
4747 switch (line->type) {
4748 case LINE_STAT_STAGED:
4749 type = LINE_STAT_SECTION;
4750 text = "Changes to be committed:";
4751 break;
4752
4753 case LINE_STAT_UNSTAGED:
4754 type = LINE_STAT_SECTION;
4755 text = "Changed but not updated:";
4756 break;
4757
4758 case LINE_STAT_UNTRACKED:
4759 type = LINE_STAT_SECTION;
4760 text = "Untracked files:";
4761 break;
4762
4763 case LINE_STAT_NONE:
4764 type = LINE_DEFAULT;
4765 text = " (no files)";
4766 break;
4767
4768 case LINE_STAT_HEAD:
4769 type = LINE_STAT_HEAD;
4770 text = status_onbranch;
4771 break;
4772
4773 default:
4774 return FALSE;
4775 }
4776 } else {
4777 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4778
4779 buf[0] = status->status;
4780 if (draw_text(view, line->type, buf, TRUE))
4781 return TRUE;
4782 type = LINE_DEFAULT;
4783 text = status->new.name;
4784 }
4785
4786 draw_text(view, type, text, TRUE);
4787 return TRUE;
4788 }
4789
4790 static enum request
4791 status_enter(struct view *view, struct line *line)
4792 {
4793 struct status *status = line->data;
4794 const char *oldpath = status ? status->old.name : NULL;
4795 /* Diffs for unmerged entries are empty when passing the new
4796 * path, so leave it empty. */
4797 const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
4798 const char *info;
4799 enum open_flags split;
4800 struct view *stage = VIEW(REQ_VIEW_STAGE);
4801
4802 if (line->type == LINE_STAT_NONE ||
4803 (!status && line[1].type == LINE_STAT_NONE)) {
4804 report("No file to diff");
4805 return REQ_NONE;
4806 }
4807
4808 switch (line->type) {
4809 case LINE_STAT_STAGED:
4810 if (is_initial_commit()) {
4811 const char *no_head_diff_argv[] = {
4812 "git", "diff", "--no-color", "--patch-with-stat",
4813 "--", "/dev/null", newpath, NULL
4814 };
4815
4816 if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
4817 return REQ_QUIT;
4818 } else {
4819 const char *index_show_argv[] = {
4820 "git", "diff-index", "--root", "--patch-with-stat",
4821 "-C", "-M", "--cached", "HEAD", "--",
4822 oldpath, newpath, NULL
4823 };
4824
4825 if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
4826 return REQ_QUIT;
4827 }
4828
4829 if (status)
4830 info = "Staged changes to %s";
4831 else
4832 info = "Staged changes";
4833 break;
4834
4835 case LINE_STAT_UNSTAGED:
4836 {
4837 const char *files_show_argv[] = {
4838 "git", "diff-files", "--root", "--patch-with-stat",
4839 "-C", "-M", "--", oldpath, newpath, NULL
4840 };
4841
4842 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
4843 return REQ_QUIT;
4844 if (status)
4845 info = "Unstaged changes to %s";
4846 else
4847 info = "Unstaged changes";
4848 break;
4849 }
4850 case LINE_STAT_UNTRACKED:
4851 if (!newpath) {
4852 report("No file to show");
4853 return REQ_NONE;
4854 }
4855
4856 if (!suffixcmp(status->new.name, -1, "/")) {
4857 report("Cannot display a directory");
4858 return REQ_NONE;
4859 }
4860
4861 if (!prepare_update_file(stage, newpath))
4862 return REQ_QUIT;
4863 info = "Untracked file %s";
4864 break;
4865
4866 case LINE_STAT_HEAD:
4867 return REQ_NONE;
4868
4869 default:
4870 die("line type %d not handled in switch", line->type);
4871 }
4872
4873 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4874 open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
4875 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4876 if (status) {
4877 stage_status = *status;
4878 } else {
4879 memset(&stage_status, 0, sizeof(stage_status));
4880 }
4881
4882 stage_line_type = line->type;
4883 stage_chunks = 0;
4884 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4885 }
4886
4887 return REQ_NONE;
4888 }
4889
4890 static bool
4891 status_exists(struct status *status, enum line_type type)
4892 {
4893 struct view *view = VIEW(REQ_VIEW_STATUS);
4894 unsigned long lineno;
4895
4896 for (lineno = 0; lineno < view->lines; lineno++) {
4897 struct line *line = &view->line[lineno];
4898 struct status *pos = line->data;
4899
4900 if (line->type != type)
4901 continue;
4902 if (!pos && (!status || !status->status) && line[1].data) {
4903 select_view_line(view, lineno);
4904 return TRUE;
4905 }
4906 if (pos && !strcmp(status->new.name, pos->new.name)) {
4907 select_view_line(view, lineno);
4908 return TRUE;
4909 }
4910 }
4911
4912 return FALSE;
4913 }
4914
4915
4916 static bool
4917 status_update_prepare(struct io *io, enum line_type type)
4918 {
4919 const char *staged_argv[] = {
4920 "git", "update-index", "-z", "--index-info", NULL
4921 };
4922 const char *others_argv[] = {
4923 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
4924 };
4925
4926 switch (type) {
4927 case LINE_STAT_STAGED:
4928 return run_io(io, staged_argv, opt_cdup, IO_WR);
4929
4930 case LINE_STAT_UNSTAGED:
4931 return run_io(io, others_argv, opt_cdup, IO_WR);
4932
4933 case LINE_STAT_UNTRACKED:
4934 return run_io(io, others_argv, NULL, IO_WR);
4935
4936 default:
4937 die("line type %d not handled in switch", type);
4938 return FALSE;
4939 }
4940 }
4941
4942 static bool
4943 status_update_write(struct io *io, struct status *status, enum line_type type)
4944 {
4945 char buf[SIZEOF_STR];
4946 size_t bufsize = 0;
4947
4948 switch (type) {
4949 case LINE_STAT_STAGED:
4950 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
4951 status->old.mode,
4952 status->old.rev,
4953 status->old.name, 0))
4954 return FALSE;
4955 break;
4956
4957 case LINE_STAT_UNSTAGED:
4958 case LINE_STAT_UNTRACKED:
4959 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
4960 return FALSE;
4961 break;
4962
4963 default:
4964 die("line type %d not handled in switch", type);
4965 }
4966
4967 return io_write(io, buf, bufsize);
4968 }
4969
4970 static bool
4971 status_update_file(struct status *status, enum line_type type)
4972 {
4973 struct io io = {};
4974 bool result;
4975
4976 if (!status_update_prepare(&io, type))
4977 return FALSE;
4978
4979 result = status_update_write(&io, status, type);
4980 done_io(&io);
4981 return result;
4982 }
4983
4984 static bool
4985 status_update_files(struct view *view, struct line *line)
4986 {
4987 struct io io = {};
4988 bool result = TRUE;
4989 struct line *pos = view->line + view->lines;
4990 int files = 0;
4991 int file, done;
4992
4993 if (!status_update_prepare(&io, line->type))
4994 return FALSE;
4995
4996 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
4997 files++;
4998
4999 for (file = 0, done = 0; result && file < files; line++, file++) {
5000 int almost_done = file * 100 / files;
5001
5002 if (almost_done > done) {
5003 done = almost_done;
5004 string_format(view->ref, "updating file %u of %u (%d%% done)",
5005 file, files, done);
5006 update_view_title(view);
5007 }
5008 result = status_update_write(&io, line->data, line->type);
5009 }
5010
5011 done_io(&io);
5012 return result;
5013 }
5014
5015 static bool
5016 status_update(struct view *view)
5017 {
5018 struct line *line = &view->line[view->lineno];
5019
5020 assert(view->lines);
5021
5022 if (!line->data) {
5023 /* This should work even for the "On branch" line. */
5024 if (line < view->line + view->lines && !line[1].data) {
5025 report("Nothing to update");
5026 return FALSE;
5027 }
5028
5029 if (!status_update_files(view, line + 1)) {
5030 report("Failed to update file status");
5031 return FALSE;
5032 }
5033
5034 } else if (!status_update_file(line->data, line->type)) {
5035 report("Failed to update file status");
5036 return FALSE;
5037 }
5038
5039 return TRUE;
5040 }
5041
5042 static bool
5043 status_revert(struct status *status, enum line_type type, bool has_none)
5044 {
5045 if (!status || type != LINE_STAT_UNSTAGED) {
5046 if (type == LINE_STAT_STAGED) {
5047 report("Cannot revert changes to staged files");
5048 } else if (type == LINE_STAT_UNTRACKED) {
5049 report("Cannot revert changes to untracked files");
5050 } else if (has_none) {
5051 report("Nothing to revert");
5052 } else {
5053 report("Cannot revert changes to multiple files");
5054 }
5055 return FALSE;
5056
5057 } else {
5058 const char *checkout_argv[] = {
5059 "git", "checkout", "--", status->old.name, NULL
5060 };
5061
5062 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
5063 return FALSE;
5064 return run_io_fg(checkout_argv, opt_cdup);
5065 }
5066 }
5067
5068 static enum request
5069 status_request(struct view *view, enum request request, struct line *line)
5070 {
5071 struct status *status = line->data;
5072
5073 switch (request) {
5074 case REQ_STATUS_UPDATE:
5075 if (!status_update(view))
5076 return REQ_NONE;
5077 break;
5078
5079 case REQ_STATUS_REVERT:
5080 if (!status_revert(status, line->type, status_has_none(view, line)))
5081 return REQ_NONE;
5082 break;
5083
5084 case REQ_STATUS_MERGE:
5085 if (!status || status->status != 'U') {
5086 report("Merging only possible for files with unmerged status ('U').");
5087 return REQ_NONE;
5088 }
5089 open_mergetool(status->new.name);
5090 break;
5091
5092 case REQ_EDIT:
5093 if (!status)
5094 return request;
5095 if (status->status == 'D') {
5096 report("File has been deleted.");
5097 return REQ_NONE;
5098 }
5099
5100 open_editor(status->status != '?', status->new.name);
5101 break;
5102
5103 case REQ_VIEW_BLAME:
5104 if (status) {
5105 string_copy(opt_file, status->new.name);
5106 opt_ref[0] = 0;
5107 }
5108 return request;
5109
5110 case REQ_ENTER:
5111 /* After returning the status view has been split to
5112 * show the stage view. No further reloading is
5113 * necessary. */
5114 status_enter(view, line);
5115 return REQ_NONE;
5116
5117 case REQ_REFRESH:
5118 /* Simply reload the view. */
5119 break;
5120
5121 default:
5122 return request;
5123 }
5124
5125 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5126
5127 return REQ_NONE;
5128 }
5129
5130 static void
5131 status_select(struct view *view, struct line *line)
5132 {
5133 struct status *status = line->data;
5134 char file[SIZEOF_STR] = "all files";
5135 const char *text;
5136 const char *key;
5137
5138 if (status && !string_format(file, "'%s'", status->new.name))
5139 return;
5140
5141 if (!status && line[1].type == LINE_STAT_NONE)
5142 line++;
5143
5144 switch (line->type) {
5145 case LINE_STAT_STAGED:
5146 text = "Press %s to unstage %s for commit";
5147 break;
5148
5149 case LINE_STAT_UNSTAGED:
5150 text = "Press %s to stage %s for commit";
5151 break;
5152
5153 case LINE_STAT_UNTRACKED:
5154 text = "Press %s to stage %s for addition";
5155 break;
5156
5157 case LINE_STAT_HEAD:
5158 case LINE_STAT_NONE:
5159 text = "Nothing to update";
5160 break;
5161
5162 default:
5163 die("line type %d not handled in switch", line->type);
5164 }
5165
5166 if (status && status->status == 'U') {
5167 text = "Press %s to resolve conflict in %s";
5168 key = get_key(REQ_STATUS_MERGE);
5169
5170 } else {
5171 key = get_key(REQ_STATUS_UPDATE);
5172 }
5173
5174 string_format(view->ref, text, key, file);
5175 }
5176
5177 static bool
5178 status_grep(struct view *view, struct line *line)
5179 {
5180 struct status *status = line->data;
5181 enum { S_STATUS, S_NAME, S_END } state;
5182 char buf[2] = "?";
5183 regmatch_t pmatch;
5184
5185 if (!status)
5186 return FALSE;
5187
5188 for (state = S_STATUS; state < S_END; state++) {
5189 const char *text;
5190
5191 switch (state) {
5192 case S_NAME: text = status->new.name; break;
5193 case S_STATUS:
5194 buf[0] = status->status;
5195 text = buf;
5196 break;
5197
5198 default:
5199 return FALSE;
5200 }
5201
5202 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5203 return TRUE;
5204 }
5205
5206 return FALSE;
5207 }
5208
5209 static struct view_ops status_ops = {
5210 "file",
5211 NULL,
5212 status_open,
5213 NULL,
5214 status_draw,
5215 status_request,
5216 status_grep,
5217 status_select,
5218 };
5219
5220
5221 static bool
5222 stage_diff_write(struct io *io, struct line *line, struct line *end)
5223 {
5224 while (line < end) {
5225 if (!io_write(io, line->data, strlen(line->data)) ||
5226 !io_write(io, "\n", 1))
5227 return FALSE;
5228 line++;
5229 if (line->type == LINE_DIFF_CHUNK ||
5230 line->type == LINE_DIFF_HEADER)
5231 break;
5232 }
5233
5234 return TRUE;
5235 }
5236
5237 static struct line *
5238 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5239 {
5240 for (; view->line < line; line--)
5241 if (line->type == type)
5242 return line;
5243
5244 return NULL;
5245 }
5246
5247 static bool
5248 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5249 {
5250 const char *apply_argv[SIZEOF_ARG] = {
5251 "git", "apply", "--whitespace=nowarn", NULL
5252 };
5253 struct line *diff_hdr;
5254 struct io io = {};
5255 int argc = 3;
5256
5257 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5258 if (!diff_hdr)
5259 return FALSE;
5260
5261 if (!revert)
5262 apply_argv[argc++] = "--cached";
5263 if (revert || stage_line_type == LINE_STAT_STAGED)
5264 apply_argv[argc++] = "-R";
5265 apply_argv[argc++] = "-";
5266 apply_argv[argc++] = NULL;
5267 if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
5268 return FALSE;
5269
5270 if (!stage_diff_write(&io, diff_hdr, chunk) ||
5271 !stage_diff_write(&io, chunk, view->line + view->lines))
5272 chunk = NULL;
5273
5274 done_io(&io);
5275 run_io_bg(update_index_argv);
5276
5277 return chunk ? TRUE : FALSE;
5278 }
5279
5280 static bool
5281 stage_update(struct view *view, struct line *line)
5282 {
5283 struct line *chunk = NULL;
5284
5285 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5286 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5287
5288 if (chunk) {
5289 if (!stage_apply_chunk(view, chunk, FALSE)) {
5290 report("Failed to apply chunk");
5291 return FALSE;
5292 }
5293
5294 } else if (!stage_status.status) {
5295 view = VIEW(REQ_VIEW_STATUS);
5296
5297 for (line = view->line; line < view->line + view->lines; line++)
5298 if (line->type == stage_line_type)
5299 break;
5300
5301 if (!status_update_files(view, line + 1)) {
5302 report("Failed to update files");
5303 return FALSE;
5304 }
5305
5306 } else if (!status_update_file(&stage_status, stage_line_type)) {
5307 report("Failed to update file");
5308 return FALSE;
5309 }
5310
5311 return TRUE;
5312 }
5313
5314 static bool
5315 stage_revert(struct view *view, struct line *line)
5316 {
5317 struct line *chunk = NULL;
5318
5319 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5320 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5321
5322 if (chunk) {
5323 if (!prompt_yesno("Are you sure you want to revert changes?"))
5324 return FALSE;
5325
5326 if (!stage_apply_chunk(view, chunk, TRUE)) {
5327 report("Failed to revert chunk");
5328 return FALSE;
5329 }
5330 return TRUE;
5331
5332 } else {
5333 return status_revert(stage_status.status ? &stage_status : NULL,
5334 stage_line_type, FALSE);
5335 }
5336 }
5337
5338
5339 static void
5340 stage_next(struct view *view, struct line *line)
5341 {
5342 int i;
5343
5344 if (!stage_chunks) {
5345 static size_t alloc = 0;
5346 int *tmp;
5347
5348 for (line = view->line; line < view->line + view->lines; line++) {
5349 if (line->type != LINE_DIFF_CHUNK)
5350 continue;
5351
5352 tmp = realloc_items(stage_chunk, &alloc,
5353 stage_chunks, sizeof(*tmp));
5354 if (!tmp) {
5355 report("Allocation failure");
5356 return;
5357 }
5358
5359 stage_chunk = tmp;
5360 stage_chunk[stage_chunks++] = line - view->line;
5361 }
5362 }
5363
5364 for (i = 0; i < stage_chunks; i++) {
5365 if (stage_chunk[i] > view->lineno) {
5366 do_scroll_view(view, stage_chunk[i] - view->lineno);
5367 report("Chunk %d of %d", i + 1, stage_chunks);
5368 return;
5369 }
5370 }
5371
5372 report("No next chunk found");
5373 }
5374
5375 static enum request
5376 stage_request(struct view *view, enum request request, struct line *line)
5377 {
5378 switch (request) {
5379 case REQ_STATUS_UPDATE:
5380 if (!stage_update(view, line))
5381 return REQ_NONE;
5382 break;
5383
5384 case REQ_STATUS_REVERT:
5385 if (!stage_revert(view, line))
5386 return REQ_NONE;
5387 break;
5388
5389 case REQ_STAGE_NEXT:
5390 if (stage_line_type == LINE_STAT_UNTRACKED) {
5391 report("File is untracked; press %s to add",
5392 get_key(REQ_STATUS_UPDATE));
5393 return REQ_NONE;
5394 }
5395 stage_next(view, line);
5396 return REQ_NONE;
5397
5398 case REQ_EDIT:
5399 if (!stage_status.new.name[0])
5400 return request;
5401 if (stage_status.status == 'D') {
5402 report("File has been deleted.");
5403 return REQ_NONE;
5404 }
5405
5406 open_editor(stage_status.status != '?', stage_status.new.name);
5407 break;
5408
5409 case REQ_REFRESH:
5410 /* Reload everything ... */
5411 break;
5412
5413 case REQ_VIEW_BLAME:
5414 if (stage_status.new.name[0]) {
5415 string_copy(opt_file, stage_status.new.name);
5416 opt_ref[0] = 0;
5417 }
5418 return request;
5419
5420 case REQ_ENTER:
5421 return pager_request(view, request, line);
5422
5423 default:
5424 return request;
5425 }
5426
5427 VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5428 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD | OPEN_NOMAXIMIZE);
5429
5430 /* Check whether the staged entry still exists, and close the
5431 * stage view if it doesn't. */
5432 if (!status_exists(&stage_status, stage_line_type)) {
5433 status_restore(VIEW(REQ_VIEW_STATUS));
5434 return REQ_VIEW_CLOSE;
5435 }
5436
5437 if (stage_line_type == LINE_STAT_UNTRACKED) {
5438 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5439 report("Cannot display a directory");
5440 return REQ_NONE;
5441 }
5442
5443 if (!prepare_update_file(view, stage_status.new.name)) {
5444 report("Failed to open file: %s", strerror(errno));
5445 return REQ_NONE;
5446 }
5447 }
5448 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5449
5450 return REQ_NONE;
5451 }
5452
5453 static struct view_ops stage_ops = {
5454 "line",
5455 NULL,
5456 NULL,
5457 pager_read,
5458 pager_draw,
5459 stage_request,
5460 pager_grep,
5461 pager_select,
5462 };
5463
5464
5465 /*
5466 * Revision graph
5467 */
5468
5469 struct commit {
5470 char id[SIZEOF_REV]; /* SHA1 ID. */
5471 char title[128]; /* First line of the commit message. */
5472 char author[75]; /* Author of the commit. */
5473 struct tm time; /* Date from the author ident. */
5474 struct ref **refs; /* Repository references. */
5475 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
5476 size_t graph_size; /* The width of the graph array. */
5477 bool has_parents; /* Rewritten --parents seen. */
5478 };
5479
5480 /* Size of rev graph with no "padding" columns */
5481 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5482
5483 struct rev_graph {
5484 struct rev_graph *prev, *next, *parents;
5485 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5486 size_t size;
5487 struct commit *commit;
5488 size_t pos;
5489 unsigned int boundary:1;
5490 };
5491
5492 /* Parents of the commit being visualized. */
5493 static struct rev_graph graph_parents[4];
5494
5495 /* The current stack of revisions on the graph. */
5496 static struct rev_graph graph_stacks[4] = {
5497 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5498 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5499 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5500 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5501 };
5502
5503 static inline bool
5504 graph_parent_is_merge(struct rev_graph *graph)
5505 {
5506 return graph->parents->size > 1;
5507 }
5508
5509 static inline void
5510 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5511 {
5512 struct commit *commit = graph->commit;
5513
5514 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5515 commit->graph[commit->graph_size++] = symbol;
5516 }
5517
5518 static void
5519 clear_rev_graph(struct rev_graph *graph)
5520 {
5521 graph->boundary = 0;
5522 graph->size = graph->pos = 0;
5523 graph->commit = NULL;
5524 memset(graph->parents, 0, sizeof(*graph->parents));
5525 }
5526
5527 static void
5528 done_rev_graph(struct rev_graph *graph)
5529 {
5530 if (graph_parent_is_merge(graph) &&
5531 graph->pos < graph->size - 1 &&
5532 graph->next->size == graph->size + graph->parents->size - 1) {
5533 size_t i = graph->pos + graph->parents->size - 1;
5534
5535 graph->commit->graph_size = i * 2;
5536 while (i < graph->next->size - 1) {
5537 append_to_rev_graph(graph, ' ');
5538 append_to_rev_graph(graph, '\\');
5539 i++;
5540 }
5541 }
5542
5543 clear_rev_graph(graph);
5544 }
5545
5546 static void
5547 push_rev_graph(struct rev_graph *graph, const char *parent)
5548 {
5549 int i;
5550
5551 /* "Collapse" duplicate parents lines.
5552 *
5553 * FIXME: This needs to also update update the drawn graph but
5554 * for now it just serves as a method for pruning graph lines. */
5555 for (i = 0; i < graph->size; i++)
5556 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5557 return;
5558
5559 if (graph->size < SIZEOF_REVITEMS) {
5560 string_copy_rev(graph->rev[graph->size++], parent);
5561 }
5562 }
5563
5564 static chtype
5565 get_rev_graph_symbol(struct rev_graph *graph)
5566 {
5567 chtype symbol;
5568
5569 if (graph->boundary)
5570 symbol = REVGRAPH_BOUND;
5571 else if (graph->parents->size == 0)
5572 symbol = REVGRAPH_INIT;
5573 else if (graph_parent_is_merge(graph))
5574 symbol = REVGRAPH_MERGE;
5575 else if (graph->pos >= graph->size)
5576 symbol = REVGRAPH_BRANCH;
5577 else
5578 symbol = REVGRAPH_COMMIT;
5579
5580 return symbol;
5581 }
5582
5583 static void
5584 draw_rev_graph(struct rev_graph *graph)
5585 {
5586 struct rev_filler {
5587 chtype separator, line;
5588 };
5589 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
5590 static struct rev_filler fillers[] = {
5591 { ' ', '|' },
5592 { '`', '.' },
5593 { '\'', ' ' },
5594 { '/', ' ' },
5595 };
5596 chtype symbol = get_rev_graph_symbol(graph);
5597 struct rev_filler *filler;
5598 size_t i;
5599
5600 if (opt_line_graphics)
5601 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
5602
5603 filler = &fillers[DEFAULT];
5604
5605 for (i = 0; i < graph->pos; i++) {
5606 append_to_rev_graph(graph, filler->line);
5607 if (graph_parent_is_merge(graph->prev) &&
5608 graph->prev->pos == i)
5609 filler = &fillers[RSHARP];
5610
5611 append_to_rev_graph(graph, filler->separator);
5612 }
5613
5614 /* Place the symbol for this revision. */
5615 append_to_rev_graph(graph, symbol);
5616
5617 if (graph->prev->size > graph->size)
5618 filler = &fillers[RDIAG];
5619 else
5620 filler = &fillers[DEFAULT];
5621
5622 i++;
5623
5624 for (; i < graph->size; i++) {
5625 append_to_rev_graph(graph, filler->separator);
5626 append_to_rev_graph(graph, filler->line);
5627 if (graph_parent_is_merge(graph->prev) &&
5628 i < graph->prev->pos + graph->parents->size)
5629 filler = &fillers[RSHARP];
5630 if (graph->prev->size > graph->size)
5631 filler = &fillers[LDIAG];
5632 }
5633
5634 if (graph->prev->size > graph->size) {
5635 append_to_rev_graph(graph, filler->separator);
5636 if (filler->line != ' ')
5637 append_to_rev_graph(graph, filler->line);
5638 }
5639 }
5640
5641 /* Prepare the next rev graph */
5642 static void
5643 prepare_rev_graph(struct rev_graph *graph)
5644 {
5645 size_t i;
5646
5647 /* First, traverse all lines of revisions up to the active one. */
5648 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5649 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5650 break;
5651
5652 push_rev_graph(graph->next, graph->rev[graph->pos]);
5653 }
5654
5655 /* Interleave the new revision parent(s). */
5656 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5657 push_rev_graph(graph->next, graph->parents->rev[i]);
5658
5659 /* Lastly, put any remaining revisions. */
5660 for (i = graph->pos + 1; i < graph->size; i++)
5661 push_rev_graph(graph->next, graph->rev[i]);
5662 }
5663
5664 static void
5665 update_rev_graph(struct view *view, struct rev_graph *graph)
5666 {
5667 /* If this is the finalizing update ... */
5668 if (graph->commit)
5669 prepare_rev_graph(graph);
5670
5671 /* Graph visualization needs a one rev look-ahead,
5672 * so the first update doesn't visualize anything. */
5673 if (!graph->prev->commit)
5674 return;
5675
5676 if (view->lines > 2)
5677 view->line[view->lines - 3].dirty = 1;
5678 if (view->lines > 1)
5679 view->line[view->lines - 2].dirty = 1;
5680 draw_rev_graph(graph->prev);
5681 done_rev_graph(graph->prev->prev);
5682 }
5683
5684
5685 /*
5686 * Main view backend
5687 */
5688
5689 static const char *main_argv[SIZEOF_ARG] = {
5690 "git", "log", "--no-color", "--pretty=raw", "--parents",
5691 "--topo-order", "%(head)", NULL
5692 };
5693
5694 static bool
5695 main_draw(struct view *view, struct line *line, unsigned int lineno)
5696 {
5697 struct commit *commit = line->data;
5698
5699 if (!*commit->author)
5700 return FALSE;
5701
5702 if (opt_date && draw_date(view, &commit->time))
5703 return TRUE;
5704
5705 if (opt_author && draw_author(view, commit->author))
5706 return TRUE;
5707
5708 if (opt_rev_graph && commit->graph_size &&
5709 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5710 return TRUE;
5711
5712 if (opt_show_refs && commit->refs) {
5713 size_t i = 0;
5714
5715 do {
5716 enum line_type type;
5717
5718 if (commit->refs[i]->head)
5719 type = LINE_MAIN_HEAD;
5720 else if (commit->refs[i]->ltag)
5721 type = LINE_MAIN_LOCAL_TAG;
5722 else if (commit->refs[i]->tag)
5723 type = LINE_MAIN_TAG;
5724 else if (commit->refs[i]->tracked)
5725 type = LINE_MAIN_TRACKED;
5726 else if (commit->refs[i]->remote)
5727 type = LINE_MAIN_REMOTE;
5728 else
5729 type = LINE_MAIN_REF;
5730
5731 if (draw_text(view, type, "[", TRUE) ||
5732 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5733 draw_text(view, type, "]", TRUE))
5734 return TRUE;
5735
5736 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5737 return TRUE;
5738 } while (commit->refs[i++]->next);
5739 }
5740
5741 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5742 return TRUE;
5743 }
5744
5745 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5746 static bool
5747 main_read(struct view *view, char *line)
5748 {
5749 static struct rev_graph *graph = graph_stacks;
5750 enum line_type type;
5751 struct commit *commit;
5752
5753 if (!line) {
5754 int i;
5755
5756 if (!view->lines && !view->parent)
5757 die("No revisions match the given arguments.");
5758 if (view->lines > 0) {
5759 commit = view->line[view->lines - 1].data;
5760 view->line[view->lines - 1].dirty = 1;
5761 if (!*commit->author) {
5762 view->lines--;
5763 free(commit);
5764 graph->commit = NULL;
5765 }
5766 }
5767 update_rev_graph(view, graph);
5768
5769 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5770 clear_rev_graph(&graph_stacks[i]);
5771 return TRUE;
5772 }
5773
5774 type = get_line_type(line);
5775 if (type == LINE_COMMIT) {
5776 commit = calloc(1, sizeof(struct commit));
5777 if (!commit)
5778 return FALSE;
5779
5780 line += STRING_SIZE("commit ");
5781 if (*line == '-') {
5782 graph->boundary = 1;
5783 line++;
5784 }
5785
5786 string_copy_rev(commit->id, line);
5787 commit->refs = get_refs(commit->id);
5788 graph->commit = commit;
5789 add_line_data(view, commit, LINE_MAIN_COMMIT);
5790
5791 while ((line = strchr(line, ' '))) {
5792 line++;
5793 push_rev_graph(graph->parents, line);
5794 commit->has_parents = TRUE;
5795 }
5796 return TRUE;
5797 }
5798
5799 if (!view->lines)
5800 return TRUE;
5801 commit = view->line[view->lines - 1].data;
5802
5803 switch (type) {
5804 case LINE_PARENT:
5805 if (commit->has_parents)
5806 break;
5807 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5808 break;
5809
5810 case LINE_AUTHOR:
5811 parse_author_line(line + STRING_SIZE("author "),
5812 commit->author, sizeof(commit->author),
5813 &commit->time);
5814 update_rev_graph(view, graph);
5815 graph = graph->next;
5816 break;
5817
5818 default:
5819 /* Fill in the commit title if it has not already been set. */
5820 if (commit->title[0])
5821 break;
5822
5823 /* Require titles to start with a non-space character at the
5824 * offset used by git log. */
5825 if (strncmp(line, " ", 4))
5826 break;
5827 line += 4;
5828 /* Well, if the title starts with a whitespace character,
5829 * try to be forgiving. Otherwise we end up with no title. */
5830 while (isspace(*line))
5831 line++;
5832 if (*line == '\0')
5833 break;
5834 /* FIXME: More graceful handling of titles; append "..." to
5835 * shortened titles, etc. */
5836
5837 string_ncopy(commit->title, line, strlen(line));
5838 view->line[view->lines - 1].dirty = 1;
5839 }
5840
5841 return TRUE;
5842 }
5843
5844 static enum request
5845 main_request(struct view *view, enum request request, struct line *line)
5846 {
5847 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5848
5849 switch (request) {
5850 case REQ_ENTER:
5851 open_view(view, REQ_VIEW_DIFF, flags);
5852 break;
5853 case REQ_REFRESH:
5854 load_refs();
5855 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5856 break;
5857 default:
5858 return request;
5859 }
5860
5861 return REQ_NONE;
5862 }
5863
5864 static bool
5865 grep_refs(struct ref **refs, regex_t *regex)
5866 {
5867 regmatch_t pmatch;
5868 size_t i = 0;
5869
5870 if (!refs)
5871 return FALSE;
5872 do {
5873 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5874 return TRUE;
5875 } while (refs[i++]->next);
5876
5877 return FALSE;
5878 }
5879
5880 static bool
5881 main_grep(struct view *view, struct line *line)
5882 {
5883 struct commit *commit = line->data;
5884 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5885 char buf[DATE_COLS + 1];
5886 regmatch_t pmatch;
5887
5888 for (state = S_TITLE; state < S_END; state++) {
5889 char *text;
5890
5891 switch (state) {
5892 case S_TITLE: text = commit->title; break;
5893 case S_AUTHOR:
5894 if (!opt_author)
5895 continue;
5896 text = commit->author;
5897 break;
5898 case S_DATE:
5899 if (!opt_date)
5900 continue;
5901 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5902 continue;
5903 text = buf;
5904 break;
5905 case S_REFS:
5906 if (!opt_show_refs)
5907 continue;
5908 if (grep_refs(commit->refs, view->regex) == TRUE)
5909 return TRUE;
5910 continue;
5911 default:
5912 return FALSE;
5913 }
5914
5915 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5916 return TRUE;
5917 }
5918
5919 return FALSE;
5920 }
5921
5922 static void
5923 main_select(struct view *view, struct line *line)
5924 {
5925 struct commit *commit = line->data;
5926
5927 string_copy_rev(view->ref, commit->id);
5928 string_copy_rev(ref_commit, view->ref);
5929 }
5930
5931 static struct view_ops main_ops = {
5932 "commit",
5933 main_argv,
5934 NULL,
5935 main_read,
5936 main_draw,
5937 main_request,
5938 main_grep,
5939 main_select,
5940 };
5941
5942
5943 /*
5944 * Unicode / UTF-8 handling
5945 *
5946 * NOTE: Much of the following code for dealing with unicode is derived from
5947 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
5948 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
5949 */
5950
5951 /* I've (over)annotated a lot of code snippets because I am not entirely
5952 * confident that the approach taken by this small UTF-8 interface is correct.
5953 * --jonas */
5954
5955 static inline int
5956 unicode_width(unsigned long c)
5957 {
5958 if (c >= 0x1100 &&
5959 (c <= 0x115f /* Hangul Jamo */
5960 || c == 0x2329
5961 || c == 0x232a
5962 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
5963 /* CJK ... Yi */
5964 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
5965 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
5966 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
5967 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
5968 || (c >= 0xffe0 && c <= 0xffe6)
5969 || (c >= 0x20000 && c <= 0x2fffd)
5970 || (c >= 0x30000 && c <= 0x3fffd)))
5971 return 2;
5972
5973 if (c == '\t')
5974 return opt_tab_size;
5975
5976 return 1;
5977 }
5978
5979 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
5980 * Illegal bytes are set one. */
5981 static const unsigned char utf8_bytes[256] = {
5982 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,
5983 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,
5984 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,
5985 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,
5986 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,
5987 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,
5988 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,
5989 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,
5990 };
5991
5992 /* Decode UTF-8 multi-byte representation into a unicode character. */
5993 static inline unsigned long
5994 utf8_to_unicode(const char *string, size_t length)
5995 {
5996 unsigned long unicode;
5997
5998 switch (length) {
5999 case 1:
6000 unicode = string[0];
6001 break;
6002 case 2:
6003 unicode = (string[0] & 0x1f) << 6;
6004 unicode += (string[1] & 0x3f);
6005 break;
6006 case 3:
6007 unicode = (string[0] & 0x0f) << 12;
6008 unicode += ((string[1] & 0x3f) << 6);
6009 unicode += (string[2] & 0x3f);
6010 break;
6011 case 4:
6012 unicode = (string[0] & 0x0f) << 18;
6013 unicode += ((string[1] & 0x3f) << 12);
6014 unicode += ((string[2] & 0x3f) << 6);
6015 unicode += (string[3] & 0x3f);
6016 break;
6017 case 5:
6018 unicode = (string[0] & 0x0f) << 24;
6019 unicode += ((string[1] & 0x3f) << 18);
6020 unicode += ((string[2] & 0x3f) << 12);
6021 unicode += ((string[3] & 0x3f) << 6);
6022 unicode += (string[4] & 0x3f);
6023 break;
6024 case 6:
6025 unicode = (string[0] & 0x01) << 30;
6026 unicode += ((string[1] & 0x3f) << 24);
6027 unicode += ((string[2] & 0x3f) << 18);
6028 unicode += ((string[3] & 0x3f) << 12);
6029 unicode += ((string[4] & 0x3f) << 6);
6030 unicode += (string[5] & 0x3f);
6031 break;
6032 default:
6033 die("Invalid unicode length");
6034 }
6035
6036 /* Invalid characters could return the special 0xfffd value but NUL
6037 * should be just as good. */
6038 return unicode > 0xffff ? 0 : unicode;
6039 }
6040
6041 /* Calculates how much of string can be shown within the given maximum width
6042 * and sets trimmed parameter to non-zero value if all of string could not be
6043 * shown. If the reserve flag is TRUE, it will reserve at least one
6044 * trailing character, which can be useful when drawing a delimiter.
6045 *
6046 * Returns the number of bytes to output from string to satisfy max_width. */
6047 static size_t
6048 utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve)
6049 {
6050 const char *start = string;
6051 const char *end = strchr(string, '\0');
6052 unsigned char last_bytes = 0;
6053 size_t last_ucwidth = 0;
6054
6055 *width = 0;
6056 *trimmed = 0;
6057
6058 while (string < end) {
6059 int c = *(unsigned char *) string;
6060 unsigned char bytes = utf8_bytes[c];
6061 size_t ucwidth;
6062 unsigned long unicode;
6063
6064 if (string + bytes > end)
6065 break;
6066
6067 /* Change representation to figure out whether
6068 * it is a single- or double-width character. */
6069
6070 unicode = utf8_to_unicode(string, bytes);
6071 /* FIXME: Graceful handling of invalid unicode character. */
6072 if (!unicode)
6073 break;
6074
6075 ucwidth = unicode_width(unicode);
6076 *width += ucwidth;
6077 if (*width > max_width) {
6078 *trimmed = 1;
6079 *width -= ucwidth;
6080 if (reserve && *width == max_width) {
6081 string -= last_bytes;
6082 *width -= last_ucwidth;
6083 }
6084 break;
6085 }
6086
6087 string += bytes;
6088 last_bytes = bytes;
6089 last_ucwidth = ucwidth;
6090 }
6091
6092 return string - start;
6093 }
6094
6095
6096 /*
6097 * Status management
6098 */
6099
6100 /* Whether or not the curses interface has been initialized. */
6101 static bool cursed = FALSE;
6102
6103 /* The status window is used for polling keystrokes. */
6104 static WINDOW *status_win;
6105
6106 /* Reading from the prompt? */
6107 static bool input_mode = FALSE;
6108
6109 static bool status_empty = FALSE;
6110
6111 /* Update status and title window. */
6112 static void
6113 report(const char *msg, ...)
6114 {
6115 struct view *view = display[current_view];
6116
6117 if (input_mode)
6118 return;
6119
6120 if (!view) {
6121 char buf[SIZEOF_STR];
6122 va_list args;
6123
6124 va_start(args, msg);
6125 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6126 buf[sizeof(buf) - 1] = 0;
6127 buf[sizeof(buf) - 2] = '.';
6128 buf[sizeof(buf) - 3] = '.';
6129 buf[sizeof(buf) - 4] = '.';
6130 }
6131 va_end(args);
6132 die("%s", buf);
6133 }
6134
6135 if (!status_empty || *msg) {
6136 va_list args;
6137
6138 va_start(args, msg);
6139
6140 wmove(status_win, 0, 0);
6141 if (*msg) {
6142 vwprintw(status_win, msg, args);
6143 status_empty = FALSE;
6144 } else {
6145 status_empty = TRUE;
6146 }
6147 wclrtoeol(status_win);
6148 wnoutrefresh(status_win);
6149
6150 va_end(args);
6151 }
6152
6153 update_view_title(view);
6154 }
6155
6156 /* Controls when nodelay should be in effect when polling user input. */
6157 static void
6158 set_nonblocking_input(bool loading)
6159 {
6160 static unsigned int loading_views;
6161
6162 if ((loading == FALSE && loading_views-- == 1) ||
6163 (loading == TRUE && loading_views++ == 0))
6164 nodelay(status_win, loading);
6165 }
6166
6167 static void
6168 init_display(void)
6169 {
6170 int x, y;
6171
6172 /* Initialize the curses library */
6173 if (isatty(STDIN_FILENO)) {
6174 cursed = !!initscr();
6175 opt_tty = stdin;
6176 } else {
6177 /* Leave stdin and stdout alone when acting as a pager. */
6178 opt_tty = fopen("/dev/tty", "r+");
6179 if (!opt_tty)
6180 die("Failed to open /dev/tty");
6181 cursed = !!newterm(NULL, opt_tty, opt_tty);
6182 }
6183
6184 if (!cursed)
6185 die("Failed to initialize curses");
6186
6187 nonl(); /* Tell curses not to do NL->CR/NL on output */
6188 cbreak(); /* Take input chars one at a time, no wait for \n */
6189 noecho(); /* Don't echo input */
6190 leaveok(stdscr, FALSE);
6191
6192 if (has_colors())
6193 init_colors();
6194
6195 getmaxyx(stdscr, y, x);
6196 status_win = newwin(1, 0, y - 1, 0);
6197 if (!status_win)
6198 die("Failed to create status window");
6199
6200 /* Enable keyboard mapping */
6201 keypad(status_win, TRUE);
6202 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6203
6204 TABSIZE = opt_tab_size;
6205 if (opt_line_graphics) {
6206 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
6207 }
6208 }
6209
6210 static int
6211 get_input(int prompt_position)
6212 {
6213 struct view *view;
6214 int i, key, cursor_y, cursor_x;
6215
6216 if (prompt_position)
6217 input_mode = TRUE;
6218
6219 while (TRUE) {
6220 foreach_view (view, i)
6221 update_view(view);
6222
6223 /* Update the cursor position. */
6224 if (prompt_position) {
6225 getbegyx(status_win, cursor_y, cursor_x);
6226 cursor_x = prompt_position;
6227 } else {
6228 view = display[current_view];
6229 getbegyx(view->win, cursor_y, cursor_x);
6230 cursor_x = view->width - 1;
6231 cursor_y += view->lineno - view->offset;
6232 }
6233 setsyx(cursor_y, cursor_x);
6234
6235 /* Refresh, accept single keystroke of input */
6236 doupdate();
6237 key = wgetch(status_win);
6238
6239 /* wgetch() with nodelay() enabled returns ERR when
6240 * there's no input. */
6241 if (key == ERR) {
6242
6243 } else if (key == KEY_RESIZE) {
6244 int height, width;
6245
6246 getmaxyx(stdscr, height, width);
6247
6248 wresize(status_win, 1, width);
6249 mvwin(status_win, height - 1, 0);
6250 wnoutrefresh(status_win);
6251 resize_display();
6252 redraw_display(TRUE);
6253
6254 } else {
6255 input_mode = FALSE;
6256 return key;
6257 }
6258 }
6259 }
6260
6261 static char *
6262 prompt_input(const char *prompt, input_handler handler, void *data)
6263 {
6264 enum input_status status = INPUT_OK;
6265 static char buf[SIZEOF_STR];
6266 size_t pos = 0;
6267
6268 buf[pos] = 0;
6269
6270 while (status == INPUT_OK || status == INPUT_SKIP) {
6271 int key;
6272
6273 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6274 wclrtoeol(status_win);
6275
6276 key = get_input(pos + 1);
6277 switch (key) {
6278 case KEY_RETURN:
6279 case KEY_ENTER:
6280 case '\n':
6281 status = pos ? INPUT_STOP : INPUT_CANCEL;
6282 break;
6283
6284 case KEY_BACKSPACE:
6285 if (pos > 0)
6286 buf[--pos] = 0;
6287 else
6288 status = INPUT_CANCEL;
6289 break;
6290
6291 case KEY_ESC:
6292 status = INPUT_CANCEL;
6293 break;
6294
6295 default:
6296 if (pos >= sizeof(buf)) {
6297 report("Input string too long");
6298 return NULL;
6299 }
6300
6301 status = handler(data, buf, key);
6302 if (status == INPUT_OK)
6303 buf[pos++] = (char) key;
6304 }
6305 }
6306
6307 /* Clear the status window */
6308 status_empty = FALSE;
6309 report("");
6310
6311 if (status == INPUT_CANCEL)
6312 return NULL;
6313
6314 buf[pos++] = 0;
6315
6316 return buf;
6317 }
6318
6319 static enum input_status
6320 prompt_yesno_handler(void *data, char *buf, int c)
6321 {
6322 if (c == 'y' || c == 'Y')
6323 return INPUT_STOP;
6324 if (c == 'n' || c == 'N')
6325 return INPUT_CANCEL;
6326 return INPUT_SKIP;
6327 }
6328
6329 static bool
6330 prompt_yesno(const char *prompt)
6331 {
6332 char prompt2[SIZEOF_STR];
6333
6334 if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6335 return FALSE;
6336
6337 return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6338 }
6339
6340 static enum input_status
6341 read_prompt_handler(void *data, char *buf, int c)
6342 {
6343 return isprint(c) ? INPUT_OK : INPUT_SKIP;
6344 }
6345
6346 static char *
6347 read_prompt(const char *prompt)
6348 {
6349 return prompt_input(prompt, read_prompt_handler, NULL);
6350 }
6351
6352 /*
6353 * Repository properties
6354 */
6355
6356 static int
6357 git_properties(const char **argv, const char *separators,
6358 int (*read_property)(char *, size_t, char *, size_t))
6359 {
6360 struct io io = {};
6361
6362 if (init_io_rd(&io, argv, NULL, FORMAT_NONE))
6363 return read_properties(&io, separators, read_property);
6364 return ERR;
6365 }
6366
6367 static struct ref *refs = NULL;
6368 static size_t refs_alloc = 0;
6369 static size_t refs_size = 0;
6370
6371 /* Id <-> ref store */
6372 static struct ref ***id_refs = NULL;
6373 static size_t id_refs_alloc = 0;
6374 static size_t id_refs_size = 0;
6375
6376 static int
6377 compare_refs(const void *ref1_, const void *ref2_)
6378 {
6379 const struct ref *ref1 = *(const struct ref **)ref1_;
6380 const struct ref *ref2 = *(const struct ref **)ref2_;
6381
6382 if (ref1->tag != ref2->tag)
6383 return ref2->tag - ref1->tag;
6384 if (ref1->ltag != ref2->ltag)
6385 return ref2->ltag - ref2->ltag;
6386 if (ref1->head != ref2->head)
6387 return ref2->head - ref1->head;
6388 if (ref1->tracked != ref2->tracked)
6389 return ref2->tracked - ref1->tracked;
6390 if (ref1->remote != ref2->remote)
6391 return ref2->remote - ref1->remote;
6392 return strcmp(ref1->name, ref2->name);
6393 }
6394
6395 static struct ref **
6396 get_refs(const char *id)
6397 {
6398 struct ref ***tmp_id_refs;
6399 struct ref **ref_list = NULL;
6400 size_t ref_list_alloc = 0;
6401 size_t ref_list_size = 0;
6402 size_t i;
6403
6404 for (i = 0; i < id_refs_size; i++)
6405 if (!strcmp(id, id_refs[i][0]->id))
6406 return id_refs[i];
6407
6408 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
6409 sizeof(*id_refs));
6410 if (!tmp_id_refs)
6411 return NULL;
6412
6413 id_refs = tmp_id_refs;
6414
6415 for (i = 0; i < refs_size; i++) {
6416 struct ref **tmp;
6417
6418 if (strcmp(id, refs[i].id))
6419 continue;
6420
6421 tmp = realloc_items(ref_list, &ref_list_alloc,
6422 ref_list_size + 1, sizeof(*ref_list));
6423 if (!tmp) {
6424 if (ref_list)
6425 free(ref_list);
6426 return NULL;
6427 }
6428
6429 ref_list = tmp;
6430 ref_list[ref_list_size] = &refs[i];
6431 /* XXX: The properties of the commit chains ensures that we can
6432 * safely modify the shared ref. The repo references will
6433 * always be similar for the same id. */
6434 ref_list[ref_list_size]->next = 1;
6435
6436 ref_list_size++;
6437 }
6438
6439 if (ref_list) {
6440 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
6441 ref_list[ref_list_size - 1]->next = 0;
6442 id_refs[id_refs_size++] = ref_list;
6443 }
6444
6445 return ref_list;
6446 }
6447
6448 static int
6449 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6450 {
6451 struct ref *ref;
6452 bool tag = FALSE;
6453 bool ltag = FALSE;
6454 bool remote = FALSE;
6455 bool tracked = FALSE;
6456 bool check_replace = FALSE;
6457 bool head = FALSE;
6458
6459 if (!prefixcmp(name, "refs/tags/")) {
6460 if (!suffixcmp(name, namelen, "^{}")) {
6461 namelen -= 3;
6462 name[namelen] = 0;
6463 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
6464 check_replace = TRUE;
6465 } else {
6466 ltag = TRUE;
6467 }
6468
6469 tag = TRUE;
6470 namelen -= STRING_SIZE("refs/tags/");
6471 name += STRING_SIZE("refs/tags/");
6472
6473 } else if (!prefixcmp(name, "refs/remotes/")) {
6474 remote = TRUE;
6475 namelen -= STRING_SIZE("refs/remotes/");
6476 name += STRING_SIZE("refs/remotes/");
6477 tracked = !strcmp(opt_remote, name);
6478
6479 } else if (!prefixcmp(name, "refs/heads/")) {
6480 namelen -= STRING_SIZE("refs/heads/");
6481 name += STRING_SIZE("refs/heads/");
6482 head = !strncmp(opt_head, name, namelen);
6483
6484 } else if (!strcmp(name, "HEAD")) {
6485 string_ncopy(opt_head_rev, id, idlen);
6486 return OK;
6487 }
6488
6489 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
6490 /* it's an annotated tag, replace the previous sha1 with the
6491 * resolved commit id; relies on the fact git-ls-remote lists
6492 * the commit id of an annotated tag right before the commit id
6493 * it points to. */
6494 refs[refs_size - 1].ltag = ltag;
6495 string_copy_rev(refs[refs_size - 1].id, id);
6496
6497 return OK;
6498 }
6499 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
6500 if (!refs)
6501 return ERR;
6502
6503 ref = &refs[refs_size++];
6504 ref->name = malloc(namelen + 1);
6505 if (!ref->name)
6506 return ERR;
6507
6508 strncpy(ref->name, name, namelen);
6509 ref->name[namelen] = 0;
6510 ref->head = head;
6511 ref->tag = tag;
6512 ref->ltag = ltag;
6513 ref->remote = remote;
6514 ref->tracked = tracked;
6515 string_copy_rev(ref->id, id);
6516
6517 return OK;
6518 }
6519
6520 static int
6521 load_refs(void)
6522 {
6523 static const char *ls_remote_argv[SIZEOF_ARG] = {
6524 "git", "ls-remote", ".", NULL
6525 };
6526 static bool init = FALSE;
6527
6528 if (!init) {
6529 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6530 init = TRUE;
6531 }
6532
6533 if (!*opt_git_dir)
6534 return OK;
6535
6536 while (refs_size > 0)
6537 free(refs[--refs_size].name);
6538 while (id_refs_size > 0)
6539 free(id_refs[--id_refs_size]);
6540
6541 return git_properties(ls_remote_argv, "\t", read_ref);
6542 }
6543
6544 static int
6545 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
6546 {
6547 if (!strcmp(name, "i18n.commitencoding"))
6548 string_ncopy(opt_encoding, value, valuelen);
6549
6550 if (!strcmp(name, "core.editor"))
6551 string_ncopy(opt_editor, value, valuelen);
6552
6553 /* branch.<head>.remote */
6554 if (*opt_head &&
6555 !strncmp(name, "branch.", 7) &&
6556 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6557 !strcmp(name + 7 + strlen(opt_head), ".remote"))
6558 string_ncopy(opt_remote, value, valuelen);
6559
6560 if (*opt_head && *opt_remote &&
6561 !strncmp(name, "branch.", 7) &&
6562 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
6563 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
6564 size_t from = strlen(opt_remote);
6565
6566 if (!prefixcmp(value, "refs/heads/")) {
6567 value += STRING_SIZE("refs/heads/");
6568 valuelen -= STRING_SIZE("refs/heads/");
6569 }
6570
6571 if (!string_format_from(opt_remote, &from, "/%s", value))
6572 opt_remote[0] = 0;
6573 }
6574
6575 return OK;
6576 }
6577
6578 static int
6579 load_git_config(void)
6580 {
6581 const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
6582
6583 return git_properties(config_list_argv, "=", read_repo_config_option);
6584 }
6585
6586 static int
6587 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
6588 {
6589 if (!opt_git_dir[0]) {
6590 string_ncopy(opt_git_dir, name, namelen);
6591
6592 } else if (opt_is_inside_work_tree == -1) {
6593 /* This can be 3 different values depending on the
6594 * version of git being used. If git-rev-parse does not
6595 * understand --is-inside-work-tree it will simply echo
6596 * the option else either "true" or "false" is printed.
6597 * Default to true for the unknown case. */
6598 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
6599
6600 } else if (*name == '.') {
6601 string_ncopy(opt_cdup, name, namelen);
6602
6603 } else {
6604 string_ncopy(opt_prefix, name, namelen);
6605 }
6606
6607 return OK;
6608 }
6609
6610 static int
6611 load_repo_info(void)
6612 {
6613 const char *head_argv[] = {
6614 "git", "symbolic-ref", "HEAD", NULL
6615 };
6616 const char *rev_parse_argv[] = {
6617 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
6618 "--show-cdup", "--show-prefix", NULL
6619 };
6620
6621 if (run_io_buf(head_argv, opt_head, sizeof(opt_head))) {
6622 chomp_string(opt_head);
6623 if (!prefixcmp(opt_head, "refs/heads/")) {
6624 char *offset = opt_head + STRING_SIZE("refs/heads/");
6625
6626 memmove(opt_head, offset, strlen(offset) + 1);
6627 }
6628 }
6629
6630 return git_properties(rev_parse_argv, "=", read_repo_info);
6631 }
6632
6633 static int
6634 read_properties(struct io *io, const char *separators,
6635 int (*read_property)(char *, size_t, char *, size_t))
6636 {
6637 char *name;
6638 int state = OK;
6639
6640 if (!start_io(io))
6641 return ERR;
6642
6643 while (state == OK && (name = io_get(io, '\n', TRUE))) {
6644 char *value;
6645 size_t namelen;
6646 size_t valuelen;
6647
6648 name = chomp_string(name);
6649 namelen = strcspn(name, separators);
6650
6651 if (name[namelen]) {
6652 name[namelen] = 0;
6653 value = chomp_string(name + namelen + 1);
6654 valuelen = strlen(value);
6655
6656 } else {
6657 value = "";
6658 valuelen = 0;
6659 }
6660
6661 state = read_property(name, namelen, value, valuelen);
6662 }
6663
6664 if (state != ERR && io_error(io))
6665 state = ERR;
6666 done_io(io);
6667
6668 return state;
6669 }
6670
6671
6672 /*
6673 * Main
6674 */
6675
6676 static void __NORETURN
6677 quit(int sig)
6678 {
6679 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6680 if (cursed)
6681 endwin();
6682 exit(0);
6683 }
6684
6685 static void __NORETURN
6686 die(const char *err, ...)
6687 {
6688 va_list args;
6689
6690 endwin();
6691
6692 va_start(args, err);
6693 fputs("tig: ", stderr);
6694 vfprintf(stderr, err, args);
6695 fputs("\n", stderr);
6696 va_end(args);
6697
6698 exit(1);
6699 }
6700
6701 static void
6702 warn(const char *msg, ...)
6703 {
6704 va_list args;
6705
6706 va_start(args, msg);
6707 fputs("tig warning: ", stderr);
6708 vfprintf(stderr, msg, args);
6709 fputs("\n", stderr);
6710 va_end(args);
6711 }
6712
6713 int
6714 main(int argc, const char *argv[])
6715 {
6716 const char **run_argv = NULL;
6717 struct view *view;
6718 enum request request;
6719 size_t i;
6720
6721 signal(SIGINT, quit);
6722
6723 if (setlocale(LC_ALL, "")) {
6724 char *codeset = nl_langinfo(CODESET);
6725
6726 string_ncopy(opt_codeset, codeset, strlen(codeset));
6727 }
6728
6729 if (load_repo_info() == ERR)
6730 die("Failed to load repo info.");
6731
6732 if (load_options() == ERR)
6733 die("Failed to load user config.");
6734
6735 if (load_git_config() == ERR)
6736 die("Failed to load repo config.");
6737
6738 request = parse_options(argc, argv, &run_argv);
6739 if (request == REQ_NONE)
6740 return 0;
6741
6742 /* Require a git repository unless when running in pager mode. */
6743 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6744 die("Not a git repository");
6745
6746 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6747 opt_utf8 = FALSE;
6748
6749 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6750 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6751 if (opt_iconv == ICONV_NONE)
6752 die("Failed to initialize character set conversion");
6753 }
6754
6755 if (load_refs() == ERR)
6756 die("Failed to load refs.");
6757
6758 foreach_view (view, i)
6759 argv_from_env(view->ops->argv, view->cmd_env);
6760
6761 init_display();
6762
6763 if (request == REQ_VIEW_PAGER || run_argv) {
6764 if (request == REQ_VIEW_PAGER)
6765 io_open(&VIEW(request)->io, "");
6766 else if (!prepare_update(VIEW(request), run_argv, NULL, FORMAT_NONE))
6767 die("Failed to format arguments");
6768 open_view(NULL, request, OPEN_PREPARED);
6769 request = REQ_NONE;
6770 }
6771
6772 while (view_driver(display[current_view], request)) {
6773 int key = get_input(0);
6774
6775 view = display[current_view];
6776 request = get_keybinding(view->keymap, key);
6777
6778 /* Some low-level request handling. This keeps access to
6779 * status_win restricted. */
6780 switch (request) {
6781 case REQ_PROMPT:
6782 {
6783 char *cmd = read_prompt(":");
6784
6785 if (cmd) {
6786 struct view *next = VIEW(REQ_VIEW_PAGER);
6787 const char *argv[SIZEOF_ARG] = { "git" };
6788 int argc = 1;
6789
6790 /* When running random commands, initially show the
6791 * command in the title. However, it maybe later be
6792 * overwritten if a commit line is selected. */
6793 string_ncopy(next->ref, cmd, strlen(cmd));
6794
6795 if (!argv_from_string(argv, &argc, cmd)) {
6796 report("Too many arguments");
6797 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
6798 report("Failed to format command");
6799 } else {
6800 open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
6801 }
6802 }
6803
6804 request = REQ_NONE;
6805 break;
6806 }
6807 case REQ_SEARCH:
6808 case REQ_SEARCH_BACK:
6809 {
6810 const char *prompt = request == REQ_SEARCH ? "/" : "?";
6811 char *search = read_prompt(prompt);
6812
6813 if (search)
6814 string_ncopy(opt_search, search, strlen(search));
6815 else
6816 request = REQ_NONE;
6817 break;
6818 }
6819 default:
6820 break;
6821 }
6822 }
6823
6824 quit(0);
6825
6826 return 0;
6827 }
Text-mode interface for git