Code

7a996dca08ca43e21b13428ebfdb3f4d0109cd42
[tig.git] / tig.c
1 /* Copyright (c) 2006-2009 Jonas Fonseca <fonseca@diku.dk>
2  *
3  * This program is free software; you can redistribute it and/or
4  * modify it under the terms of the GNU General Public License as
5  * published by the Free Software Foundation; either version 2 of
6  * the License, or (at your option) any later version.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  */
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
26 #include <assert.h>
27 #include <errno.h>
28 #include <ctype.h>
29 #include <signal.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #include <sys/wait.h>
36 #include <sys/stat.h>
37 #include <sys/select.h>
38 #include <unistd.h>
39 #include <time.h>
40 #include <fcntl.h>
42 #include <regex.h>
44 #include <locale.h>
45 #include <langinfo.h>
46 #include <iconv.h>
48 /* ncurses(3): Must be defined to have extended wide-character functions. */
49 #define _XOPEN_SOURCE_EXTENDED
51 #ifdef HAVE_NCURSESW_NCURSES_H
52 #include <ncursesw/ncurses.h>
53 #else
54 #ifdef HAVE_NCURSES_NCURSES_H
55 #include <ncurses/ncurses.h>
56 #else
57 #include <ncurses.h>
58 #endif
59 #endif
61 #if __GNUC__ >= 3
62 #define __NORETURN __attribute__((__noreturn__))
63 #else
64 #define __NORETURN
65 #endif
67 static void __NORETURN die(const char *err, ...);
68 static void warn(const char *msg, ...);
69 static void report(const char *msg, ...);
70 static void set_nonblocking_input(bool loading);
71 static size_t utf8_length(const char **string, size_t col, int *width, size_t max_width, int *trimmed, bool reserve);
73 #define ABS(x)          ((x) >= 0  ? (x) : -(x))
74 #define MIN(x, y)       ((x) < (y) ? (x) :  (y))
76 #define ARRAY_SIZE(x)   (sizeof(x) / sizeof(x[0]))
77 #define STRING_SIZE(x)  (sizeof(x) - 1)
79 #define SIZEOF_STR      1024    /* Default string size. */
80 #define SIZEOF_REF      256     /* Size of symbolic or SHA1 ID. */
81 #define SIZEOF_REV      41      /* Holds a SHA-1 and an ending NUL. */
82 #define SIZEOF_ARG      32      /* Default argument array size. */
84 /* Revision graph */
86 #define REVGRAPH_INIT   'I'
87 #define REVGRAPH_MERGE  'M'
88 #define REVGRAPH_BRANCH '+'
89 #define REVGRAPH_COMMIT '*'
90 #define REVGRAPH_BOUND  '^'
92 #define SIZEOF_REVGRAPH 19      /* Size of revision ancestry graphics. */
94 /* This color name can be used to refer to the default term colors. */
95 #define COLOR_DEFAULT   (-1)
97 #define ICONV_NONE      ((iconv_t) -1)
98 #ifndef ICONV_CONST
99 #define ICONV_CONST     /* nothing */
100 #endif
102 /* The format and size of the date column in the main view. */
103 #define DATE_FORMAT     "%Y-%m-%d %H:%M"
104 #define DATE_COLS       STRING_SIZE("2006-04-29 14:21 ")
106 #define AUTHOR_COLS     20
107 #define ID_COLS         8
109 /* The default interval between line numbers. */
110 #define NUMBER_INTERVAL 5
112 #define TAB_SIZE        8
114 #define SCALE_SPLIT_VIEW(height)        ((height) * 2 / 3)
116 #define NULL_ID         "0000000000000000000000000000000000000000"
118 #define S_ISGITLINK(mode) (((mode) & S_IFMT) == 0160000)
120 #ifndef GIT_CONFIG
121 #define GIT_CONFIG "config"
122 #endif
124 /* Some ASCII-shorthands fitted into the ncurses namespace. */
125 #define KEY_TAB         '\t'
126 #define KEY_RETURN      '\r'
127 #define KEY_ESC         27
130 struct ref {
131         char 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         char name[1];           /* Ref name; tag or head names are shortened. */
138 };
140 struct ref_list {
141         char id[SIZEOF_REV];    /* Commit SHA1 ID */
142         size_t size;            /* Number of refs. */
143         struct ref **refs;      /* References for this ID. */
144 };
146 static struct ref_list *get_ref_list(const char *id);
147 static void foreach_ref(bool (*visitor)(void *data, struct ref *ref), void *data);
148 static int load_refs(void);
150 enum format_flags {
151         FORMAT_ALL,             /* Perform replacement in all arguments. */
152         FORMAT_DASH,            /* Perform replacement up until "--". */
153         FORMAT_NONE             /* No replacement should be performed. */
154 };
156 static bool format_argv(const char *dst[], const char *src[], enum format_flags flags);
158 enum input_status {
159         INPUT_OK,
160         INPUT_SKIP,
161         INPUT_STOP,
162         INPUT_CANCEL
163 };
165 typedef enum input_status (*input_handler)(void *data, char *buf, int c);
167 static char *prompt_input(const char *prompt, input_handler handler, void *data);
168 static bool prompt_yesno(const char *prompt);
170 /*
171  * Allocation helpers ... Entering macro hell to never be seen again.
172  */
174 #define DEFINE_ALLOCATOR(name, type, chunk_size)                                \
175 static type *                                                                   \
176 name(type **mem, size_t size, size_t increase)                                  \
177 {                                                                               \
178         size_t num_chunks = (size + chunk_size - 1) / chunk_size;               \
179         size_t num_chunks_new = (size + increase + chunk_size - 1) / chunk_size;\
180         type *tmp = *mem;                                                       \
181                                                                                 \
182         if (mem == NULL || num_chunks != num_chunks_new) {                      \
183                 tmp = realloc(tmp, num_chunks_new * chunk_size * sizeof(type)); \
184                 if (tmp)                                                        \
185                         *mem = tmp;                                             \
186         }                                                                       \
187                                                                                 \
188         return tmp;                                                             \
191 /*
192  * String helpers
193  */
195 static inline void
196 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
198         if (srclen > dstlen - 1)
199                 srclen = dstlen - 1;
201         strncpy(dst, src, srclen);
202         dst[srclen] = 0;
205 /* Shorthands for safely copying into a fixed buffer. */
207 #define string_copy(dst, src) \
208         string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
210 #define string_ncopy(dst, src, srclen) \
211         string_ncopy_do(dst, sizeof(dst), src, srclen)
213 #define string_copy_rev(dst, src) \
214         string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
216 #define string_add(dst, from, src) \
217         string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
219 static void
220 string_expand(char *dst, size_t dstlen, const char *src, int tabsize)
222         size_t size, pos;
224         for (size = pos = 0; size < dstlen - 1 && src[pos]; pos++) {
225                 if (src[pos] == '\t') {
226                         size_t expanded = tabsize - (size % tabsize);
228                         if (expanded + size >= dstlen - 1)
229                                 expanded = dstlen - size - 1;
230                         memcpy(dst + size, "        ", expanded);
231                         size += expanded;
232                 } else {
233                         dst[size++] = src[pos];
234                 }
235         }
237         dst[size] = 0;
240 static char *
241 chomp_string(char *name)
243         int namelen;
245         while (isspace(*name))
246                 name++;
248         namelen = strlen(name) - 1;
249         while (namelen > 0 && isspace(name[namelen]))
250                 name[namelen--] = 0;
252         return name;
255 static bool
256 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
258         va_list args;
259         size_t pos = bufpos ? *bufpos : 0;
261         va_start(args, fmt);
262         pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
263         va_end(args);
265         if (bufpos)
266                 *bufpos = pos;
268         return pos >= bufsize ? FALSE : TRUE;
271 #define string_format(buf, fmt, args...) \
272         string_nformat(buf, sizeof(buf), NULL, fmt, args)
274 #define string_format_from(buf, from, fmt, args...) \
275         string_nformat(buf, sizeof(buf), from, fmt, args)
277 static int
278 string_enum_compare(const char *str1, const char *str2, int len)
280         size_t i;
282 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
284         /* Diff-Header == DIFF_HEADER */
285         for (i = 0; i < len; i++) {
286                 if (toupper(str1[i]) == toupper(str2[i]))
287                         continue;
289                 if (string_enum_sep(str1[i]) &&
290                     string_enum_sep(str2[i]))
291                         continue;
293                 return str1[i] - str2[i];
294         }
296         return 0;
299 struct enum_map {
300         const char *name;
301         int namelen;
302         int value;
303 };
305 #define ENUM_MAP(name, value) { name, STRING_SIZE(name), value }
307 static bool
308 map_enum_do(const struct enum_map *map, size_t map_size, int *value, const char *name)
310         size_t namelen = strlen(name);
311         int i;
313         for (i = 0; i < map_size; i++)
314                 if (namelen == map[i].namelen &&
315                     !string_enum_compare(name, map[i].name, namelen)) {
316                         *value = map[i].value;
317                         return TRUE;
318                 }
320         return FALSE;
323 #define map_enum(attr, map, name) \
324         map_enum_do(map, ARRAY_SIZE(map), attr, name)
326 #define prefixcmp(str1, str2) \
327         strncmp(str1, str2, STRING_SIZE(str2))
329 static inline int
330 suffixcmp(const char *str, int slen, const char *suffix)
332         size_t len = slen >= 0 ? slen : strlen(str);
333         size_t suffixlen = strlen(suffix);
335         return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
339 static const char *
340 mkdate(const time_t *time)
342         static char buf[DATE_COLS + 1];
343         struct tm tm;
345         gmtime_r(time, &tm);
346         return strftime(buf, sizeof(buf), DATE_FORMAT, &tm) ? buf : NULL;
350 static bool
351 argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd)
353         int valuelen;
355         while (*cmd && *argc < SIZEOF_ARG && (valuelen = strcspn(cmd, " \t"))) {
356                 bool advance = cmd[valuelen] != 0;
358                 cmd[valuelen] = 0;
359                 argv[(*argc)++] = chomp_string(cmd);
360                 cmd = chomp_string(cmd + valuelen + advance);
361         }
363         if (*argc < SIZEOF_ARG)
364                 argv[*argc] = NULL;
365         return *argc < SIZEOF_ARG;
368 static void
369 argv_from_env(const char **argv, const char *name)
371         char *env = argv ? getenv(name) : NULL;
372         int argc = 0;
374         if (env && *env)
375                 env = strdup(env);
376         if (env && !argv_from_string(argv, &argc, env))
377                 die("Too many arguments in the `%s` environment variable", name);
381 /*
382  * Executing external commands.
383  */
385 enum io_type {
386         IO_FD,                  /* File descriptor based IO. */
387         IO_BG,                  /* Execute command in the background. */
388         IO_FG,                  /* Execute command with same std{in,out,err}. */
389         IO_RD,                  /* Read only fork+exec IO. */
390         IO_WR,                  /* Write only fork+exec IO. */
391         IO_AP,                  /* Append fork+exec output to file. */
392 };
394 struct io {
395         enum io_type type;      /* The requested type of pipe. */
396         const char *dir;        /* Directory from which to execute. */
397         pid_t pid;              /* Pipe for reading or writing. */
398         int pipe;               /* Pipe end for reading or writing. */
399         int error;              /* Error status. */
400         const char *argv[SIZEOF_ARG];   /* Shell command arguments. */
401         char *buf;              /* Read buffer. */
402         size_t bufalloc;        /* Allocated buffer size. */
403         size_t bufsize;         /* Buffer content size. */
404         char *bufpos;           /* Current buffer position. */
405         unsigned int eof:1;     /* Has end of file been reached. */
406 };
408 static void
409 reset_io(struct io *io)
411         io->pipe = -1;
412         io->pid = 0;
413         io->buf = io->bufpos = NULL;
414         io->bufalloc = io->bufsize = 0;
415         io->error = 0;
416         io->eof = 0;
419 static void
420 init_io(struct io *io, const char *dir, enum io_type type)
422         reset_io(io);
423         io->type = type;
424         io->dir = dir;
427 static bool
428 init_io_rd(struct io *io, const char *argv[], const char *dir,
429                 enum format_flags flags)
431         init_io(io, dir, IO_RD);
432         return format_argv(io->argv, argv, flags);
435 static bool
436 io_open(struct io *io, const char *name)
438         init_io(io, NULL, IO_FD);
439         io->pipe = *name ? open(name, O_RDONLY) : STDIN_FILENO;
440         if (io->pipe == -1)
441                 io->error = errno;
442         return io->pipe != -1;
445 static bool
446 kill_io(struct io *io)
448         return io->pid == 0 || kill(io->pid, SIGKILL) != -1;
451 static bool
452 done_io(struct io *io)
454         pid_t pid = io->pid;
456         if (io->pipe != -1)
457                 close(io->pipe);
458         free(io->buf);
459         reset_io(io);
461         while (pid > 0) {
462                 int status;
463                 pid_t waiting = waitpid(pid, &status, 0);
465                 if (waiting < 0) {
466                         if (errno == EINTR)
467                                 continue;
468                         report("waitpid failed (%s)", strerror(errno));
469                         return FALSE;
470                 }
472                 return waiting == pid &&
473                        !WIFSIGNALED(status) &&
474                        WIFEXITED(status) &&
475                        !WEXITSTATUS(status);
476         }
478         return TRUE;
481 static bool
482 start_io(struct io *io)
484         int pipefds[2] = { -1, -1 };
486         if (io->type == IO_FD)
487                 return TRUE;
489         if ((io->type == IO_RD || io->type == IO_WR) &&
490             pipe(pipefds) < 0)
491                 return FALSE;
492         else if (io->type == IO_AP)
493                 pipefds[1] = io->pipe;
495         if ((io->pid = fork())) {
496                 if (pipefds[!(io->type == IO_WR)] != -1)
497                         close(pipefds[!(io->type == IO_WR)]);
498                 if (io->pid != -1) {
499                         io->pipe = pipefds[!!(io->type == IO_WR)];
500                         return TRUE;
501                 }
503         } else {
504                 if (io->type != IO_FG) {
505                         int devnull = open("/dev/null", O_RDWR);
506                         int readfd  = io->type == IO_WR ? pipefds[0] : devnull;
507                         int writefd = (io->type == IO_RD || io->type == IO_AP)
508                                                         ? pipefds[1] : devnull;
510                         dup2(readfd,  STDIN_FILENO);
511                         dup2(writefd, STDOUT_FILENO);
512                         dup2(devnull, STDERR_FILENO);
514                         close(devnull);
515                         if (pipefds[0] != -1)
516                                 close(pipefds[0]);
517                         if (pipefds[1] != -1)
518                                 close(pipefds[1]);
519                 }
521                 if (io->dir && *io->dir && chdir(io->dir) == -1)
522                         die("Failed to change directory: %s", strerror(errno));
524                 execvp(io->argv[0], (char *const*) io->argv);
525                 die("Failed to execute program: %s", strerror(errno));
526         }
528         if (pipefds[!!(io->type == IO_WR)] != -1)
529                 close(pipefds[!!(io->type == IO_WR)]);
530         return FALSE;
533 static bool
534 run_io(struct io *io, const char **argv, const char *dir, enum io_type type)
536         init_io(io, dir, type);
537         if (!format_argv(io->argv, argv, FORMAT_NONE))
538                 return FALSE;
539         return start_io(io);
542 static int
543 run_io_do(struct io *io)
545         return start_io(io) && done_io(io);
548 static int
549 run_io_bg(const char **argv)
551         struct io io = {};
553         init_io(&io, NULL, IO_BG);
554         if (!format_argv(io.argv, argv, FORMAT_NONE))
555                 return FALSE;
556         return run_io_do(&io);
559 static bool
560 run_io_fg(const char **argv, const char *dir)
562         struct io io = {};
564         init_io(&io, dir, IO_FG);
565         if (!format_argv(io.argv, argv, FORMAT_NONE))
566                 return FALSE;
567         return run_io_do(&io);
570 static bool
571 run_io_append(const char **argv, enum format_flags flags, int fd)
573         struct io io = {};
575         init_io(&io, NULL, IO_AP);
576         io.pipe = fd;
577         if (format_argv(io.argv, argv, flags))
578                 return run_io_do(&io);
579         close(fd);
580         return FALSE;
583 static bool
584 run_io_rd(struct io *io, const char **argv, enum format_flags flags)
586         return init_io_rd(io, argv, NULL, flags) && start_io(io);
589 static bool
590 io_eof(struct io *io)
592         return io->eof;
595 static int
596 io_error(struct io *io)
598         return io->error;
601 static char *
602 io_strerror(struct io *io)
604         return strerror(io->error);
607 static bool
608 io_can_read(struct io *io)
610         struct timeval tv = { 0, 500 };
611         fd_set fds;
613         FD_ZERO(&fds);
614         FD_SET(io->pipe, &fds);
616         return select(io->pipe + 1, &fds, NULL, NULL, &tv) > 0;
619 static ssize_t
620 io_read(struct io *io, void *buf, size_t bufsize)
622         do {
623                 ssize_t readsize = read(io->pipe, buf, bufsize);
625                 if (readsize < 0 && (errno == EAGAIN || errno == EINTR))
626                         continue;
627                 else if (readsize == -1)
628                         io->error = errno;
629                 else if (readsize == 0)
630                         io->eof = 1;
631                 return readsize;
632         } while (1);
635 DEFINE_ALLOCATOR(realloc_io_buf, char, BUFSIZ)
637 static char *
638 io_get(struct io *io, int c, bool can_read)
640         char *eol;
641         ssize_t readsize;
643         while (TRUE) {
644                 if (io->bufsize > 0) {
645                         eol = memchr(io->bufpos, c, io->bufsize);
646                         if (eol) {
647                                 char *line = io->bufpos;
649                                 *eol = 0;
650                                 io->bufpos = eol + 1;
651                                 io->bufsize -= io->bufpos - line;
652                                 return line;
653                         }
654                 }
656                 if (io_eof(io)) {
657                         if (io->bufsize) {
658                                 io->bufpos[io->bufsize] = 0;
659                                 io->bufsize = 0;
660                                 return io->bufpos;
661                         }
662                         return NULL;
663                 }
665                 if (!can_read)
666                         return NULL;
668                 if (io->bufsize > 0 && io->bufpos > io->buf)
669                         memmove(io->buf, io->bufpos, io->bufsize);
671                 if (io->bufalloc == io->bufsize) {
672                         if (!realloc_io_buf(&io->buf, io->bufalloc, BUFSIZ))
673                                 return NULL;
674                         io->bufalloc += BUFSIZ;
675                 }
677                 io->bufpos = io->buf;
678                 readsize = io_read(io, io->buf + io->bufsize, io->bufalloc - io->bufsize);
679                 if (io_error(io))
680                         return NULL;
681                 io->bufsize += readsize;
682         }
685 static bool
686 io_write(struct io *io, const void *buf, size_t bufsize)
688         size_t written = 0;
690         while (!io_error(io) && written < bufsize) {
691                 ssize_t size;
693                 size = write(io->pipe, buf + written, bufsize - written);
694                 if (size < 0 && (errno == EAGAIN || errno == EINTR))
695                         continue;
696                 else if (size == -1)
697                         io->error = errno;
698                 else
699                         written += size;
700         }
702         return written == bufsize;
705 static bool
706 io_read_buf(struct io *io, char buf[], size_t bufsize)
708         char *result = io_get(io, '\n', TRUE);
710         if (result) {
711                 result = chomp_string(result);
712                 string_ncopy_do(buf, bufsize, result, strlen(result));
713         }
715         return done_io(io) && result;
718 static bool
719 run_io_buf(const char **argv, char buf[], size_t bufsize)
721         struct io io = {};
723         return run_io_rd(&io, argv, FORMAT_NONE) && io_read_buf(&io, buf, bufsize);
726 static int
727 io_load(struct io *io, const char *separators,
728         int (*read_property)(char *, size_t, char *, size_t))
730         char *name;
731         int state = OK;
733         if (!start_io(io))
734                 return ERR;
736         while (state == OK && (name = io_get(io, '\n', TRUE))) {
737                 char *value;
738                 size_t namelen;
739                 size_t valuelen;
741                 name = chomp_string(name);
742                 namelen = strcspn(name, separators);
744                 if (name[namelen]) {
745                         name[namelen] = 0;
746                         value = chomp_string(name + namelen + 1);
747                         valuelen = strlen(value);
749                 } else {
750                         value = "";
751                         valuelen = 0;
752                 }
754                 state = read_property(name, namelen, value, valuelen);
755         }
757         if (state != ERR && io_error(io))
758                 state = ERR;
759         done_io(io);
761         return state;
764 static int
765 run_io_load(const char **argv, const char *separators,
766             int (*read_property)(char *, size_t, char *, size_t))
768         struct io io = {};
770         return init_io_rd(&io, argv, NULL, FORMAT_NONE)
771                 ? io_load(&io, separators, read_property) : ERR;
775 /*
776  * User requests
777  */
779 #define REQ_INFO \
780         /* XXX: Keep the view request first and in sync with views[]. */ \
781         REQ_GROUP("View switching") \
782         REQ_(VIEW_MAIN,         "Show main view"), \
783         REQ_(VIEW_DIFF,         "Show diff view"), \
784         REQ_(VIEW_LOG,          "Show log view"), \
785         REQ_(VIEW_TREE,         "Show tree view"), \
786         REQ_(VIEW_BLOB,         "Show blob view"), \
787         REQ_(VIEW_BLAME,        "Show blame view"), \
788         REQ_(VIEW_BRANCH,       "Show branch view"), \
789         REQ_(VIEW_HELP,         "Show help page"), \
790         REQ_(VIEW_PAGER,        "Show pager view"), \
791         REQ_(VIEW_STATUS,       "Show status view"), \
792         REQ_(VIEW_STAGE,        "Show stage view"), \
793         \
794         REQ_GROUP("View manipulation") \
795         REQ_(ENTER,             "Enter current line and scroll"), \
796         REQ_(NEXT,              "Move to next"), \
797         REQ_(PREVIOUS,          "Move to previous"), \
798         REQ_(PARENT,            "Move to parent"), \
799         REQ_(VIEW_NEXT,         "Move focus to next view"), \
800         REQ_(REFRESH,           "Reload and refresh"), \
801         REQ_(MAXIMIZE,          "Maximize the current view"), \
802         REQ_(VIEW_CLOSE,        "Close the current view"), \
803         REQ_(QUIT,              "Close all views and quit"), \
804         \
805         REQ_GROUP("View specific requests") \
806         REQ_(STATUS_UPDATE,     "Update file status"), \
807         REQ_(STATUS_REVERT,     "Revert file changes"), \
808         REQ_(STATUS_MERGE,      "Merge file using external tool"), \
809         REQ_(STAGE_NEXT,        "Find next chunk to stage"), \
810         \
811         REQ_GROUP("Cursor navigation") \
812         REQ_(MOVE_UP,           "Move cursor one line up"), \
813         REQ_(MOVE_DOWN,         "Move cursor one line down"), \
814         REQ_(MOVE_PAGE_DOWN,    "Move cursor one page down"), \
815         REQ_(MOVE_PAGE_UP,      "Move cursor one page up"), \
816         REQ_(MOVE_FIRST_LINE,   "Move cursor to first line"), \
817         REQ_(MOVE_LAST_LINE,    "Move cursor to last line"), \
818         \
819         REQ_GROUP("Scrolling") \
820         REQ_(SCROLL_LEFT,       "Scroll two columns left"), \
821         REQ_(SCROLL_RIGHT,      "Scroll two columns right"), \
822         REQ_(SCROLL_LINE_UP,    "Scroll one line up"), \
823         REQ_(SCROLL_LINE_DOWN,  "Scroll one line down"), \
824         REQ_(SCROLL_PAGE_UP,    "Scroll one page up"), \
825         REQ_(SCROLL_PAGE_DOWN,  "Scroll one page down"), \
826         \
827         REQ_GROUP("Searching") \
828         REQ_(SEARCH,            "Search the view"), \
829         REQ_(SEARCH_BACK,       "Search backwards in the view"), \
830         REQ_(FIND_NEXT,         "Find next search match"), \
831         REQ_(FIND_PREV,         "Find previous search match"), \
832         \
833         REQ_GROUP("Option manipulation") \
834         REQ_(TOGGLE_LINENO,     "Toggle line numbers"), \
835         REQ_(TOGGLE_DATE,       "Toggle date display"), \
836         REQ_(TOGGLE_AUTHOR,     "Toggle author display"), \
837         REQ_(TOGGLE_REV_GRAPH,  "Toggle revision graph visualization"), \
838         REQ_(TOGGLE_REFS,       "Toggle reference display (tags/branches)"), \
839         REQ_(TOGGLE_SORT_ORDER, "Toggle ascending/descending sort order"), \
840         REQ_(TOGGLE_SORT_FIELD, "Toggle field to sort by"), \
841         \
842         REQ_GROUP("Misc") \
843         REQ_(PROMPT,            "Bring up the prompt"), \
844         REQ_(SCREEN_REDRAW,     "Redraw the screen"), \
845         REQ_(SHOW_VERSION,      "Show version information"), \
846         REQ_(STOP_LOADING,      "Stop all loading views"), \
847         REQ_(EDIT,              "Open in editor"), \
848         REQ_(NONE,              "Do nothing")
851 /* User action requests. */
852 enum request {
853 #define REQ_GROUP(help)
854 #define REQ_(req, help) REQ_##req
856         /* Offset all requests to avoid conflicts with ncurses getch values. */
857         REQ_OFFSET = KEY_MAX + 1,
858         REQ_INFO
860 #undef  REQ_GROUP
861 #undef  REQ_
862 };
864 struct request_info {
865         enum request request;
866         const char *name;
867         int namelen;
868         const char *help;
869 };
871 static const struct request_info req_info[] = {
872 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
873 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
874         REQ_INFO
875 #undef  REQ_GROUP
876 #undef  REQ_
877 };
879 static enum request
880 get_request(const char *name)
882         int namelen = strlen(name);
883         int i;
885         for (i = 0; i < ARRAY_SIZE(req_info); i++)
886                 if (req_info[i].namelen == namelen &&
887                     !string_enum_compare(req_info[i].name, name, namelen))
888                         return req_info[i].request;
890         return REQ_NONE;
894 /*
895  * Options
896  */
898 /* Option and state variables. */
899 static bool opt_date                    = TRUE;
900 static bool opt_author                  = TRUE;
901 static bool opt_line_number             = FALSE;
902 static bool opt_line_graphics           = TRUE;
903 static bool opt_rev_graph               = FALSE;
904 static bool opt_show_refs               = TRUE;
905 static int opt_num_interval             = NUMBER_INTERVAL;
906 static double opt_hscroll               = 0.50;
907 static int opt_tab_size                 = TAB_SIZE;
908 static int opt_author_cols              = AUTHOR_COLS-1;
909 static char opt_path[SIZEOF_STR]        = "";
910 static char opt_file[SIZEOF_STR]        = "";
911 static char opt_ref[SIZEOF_REF]         = "";
912 static char opt_head[SIZEOF_REF]        = "";
913 static char opt_head_rev[SIZEOF_REV]    = "";
914 static char opt_remote[SIZEOF_REF]      = "";
915 static char opt_encoding[20]            = "UTF-8";
916 static bool opt_utf8                    = TRUE;
917 static char opt_codeset[20]             = "UTF-8";
918 static iconv_t opt_iconv                = ICONV_NONE;
919 static char opt_search[SIZEOF_STR]      = "";
920 static char opt_cdup[SIZEOF_STR]        = "";
921 static char opt_prefix[SIZEOF_STR]      = "";
922 static char opt_git_dir[SIZEOF_STR]     = "";
923 static signed char opt_is_inside_work_tree      = -1; /* set to TRUE or FALSE */
924 static char opt_editor[SIZEOF_STR]      = "";
925 static FILE *opt_tty                    = NULL;
927 #define is_initial_commit()     (!*opt_head_rev)
928 #define is_head_commit(rev)     (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
931 /*
932  * Line-oriented content detection.
933  */
935 #define LINE_INFO \
936 LINE(DIFF_HEADER,  "diff --git ",       COLOR_YELLOW,   COLOR_DEFAULT,  0), \
937 LINE(DIFF_CHUNK,   "@@",                COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
938 LINE(DIFF_ADD,     "+",                 COLOR_GREEN,    COLOR_DEFAULT,  0), \
939 LINE(DIFF_DEL,     "-",                 COLOR_RED,      COLOR_DEFAULT,  0), \
940 LINE(DIFF_INDEX,        "index ",         COLOR_BLUE,   COLOR_DEFAULT,  0), \
941 LINE(DIFF_OLDMODE,      "old file mode ", COLOR_YELLOW, COLOR_DEFAULT,  0), \
942 LINE(DIFF_NEWMODE,      "new file mode ", COLOR_YELLOW, COLOR_DEFAULT,  0), \
943 LINE(DIFF_COPY_FROM,    "copy from",      COLOR_YELLOW, COLOR_DEFAULT,  0), \
944 LINE(DIFF_COPY_TO,      "copy to",        COLOR_YELLOW, COLOR_DEFAULT,  0), \
945 LINE(DIFF_RENAME_FROM,  "rename from",    COLOR_YELLOW, COLOR_DEFAULT,  0), \
946 LINE(DIFF_RENAME_TO,    "rename to",      COLOR_YELLOW, COLOR_DEFAULT,  0), \
947 LINE(DIFF_SIMILARITY,   "similarity ",    COLOR_YELLOW, COLOR_DEFAULT,  0), \
948 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT,  0), \
949 LINE(DIFF_TREE,         "diff-tree ",     COLOR_BLUE,   COLOR_DEFAULT,  0), \
950 LINE(PP_AUTHOR,    "Author: ",          COLOR_CYAN,     COLOR_DEFAULT,  0), \
951 LINE(PP_COMMIT,    "Commit: ",          COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
952 LINE(PP_MERGE,     "Merge: ",           COLOR_BLUE,     COLOR_DEFAULT,  0), \
953 LINE(PP_DATE,      "Date:   ",          COLOR_YELLOW,   COLOR_DEFAULT,  0), \
954 LINE(PP_ADATE,     "AuthorDate: ",      COLOR_YELLOW,   COLOR_DEFAULT,  0), \
955 LINE(PP_CDATE,     "CommitDate: ",      COLOR_YELLOW,   COLOR_DEFAULT,  0), \
956 LINE(PP_REFS,      "Refs: ",            COLOR_RED,      COLOR_DEFAULT,  0), \
957 LINE(COMMIT,       "commit ",           COLOR_GREEN,    COLOR_DEFAULT,  0), \
958 LINE(PARENT,       "parent ",           COLOR_BLUE,     COLOR_DEFAULT,  0), \
959 LINE(TREE,         "tree ",             COLOR_BLUE,     COLOR_DEFAULT,  0), \
960 LINE(AUTHOR,       "author ",           COLOR_GREEN,    COLOR_DEFAULT,  0), \
961 LINE(COMMITTER,    "committer ",        COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
962 LINE(SIGNOFF,      "    Signed-off-by", COLOR_YELLOW,   COLOR_DEFAULT,  0), \
963 LINE(ACKED,        "    Acked-by",      COLOR_YELLOW,   COLOR_DEFAULT,  0), \
964 LINE(DEFAULT,      "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  A_NORMAL), \
965 LINE(CURSOR,       "",                  COLOR_WHITE,    COLOR_GREEN,    A_BOLD), \
966 LINE(STATUS,       "",                  COLOR_GREEN,    COLOR_DEFAULT,  0), \
967 LINE(DELIMITER,    "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
968 LINE(DATE,         "",                  COLOR_BLUE,     COLOR_DEFAULT,  0), \
969 LINE(MODE,         "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
970 LINE(LINE_NUMBER,  "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
971 LINE(TITLE_BLUR,   "",                  COLOR_WHITE,    COLOR_BLUE,     0), \
972 LINE(TITLE_FOCUS,  "",                  COLOR_WHITE,    COLOR_BLUE,     A_BOLD), \
973 LINE(MAIN_COMMIT,  "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  0), \
974 LINE(MAIN_TAG,     "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  A_BOLD), \
975 LINE(MAIN_LOCAL_TAG,"",                 COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
976 LINE(MAIN_REMOTE,  "",                  COLOR_YELLOW,   COLOR_DEFAULT,  0), \
977 LINE(MAIN_TRACKED, "",                  COLOR_YELLOW,   COLOR_DEFAULT,  A_BOLD), \
978 LINE(MAIN_REF,     "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
979 LINE(MAIN_HEAD,    "",                  COLOR_CYAN,     COLOR_DEFAULT,  A_BOLD), \
980 LINE(MAIN_REVGRAPH,"",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
981 LINE(TREE_HEAD,    "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  A_BOLD), \
982 LINE(TREE_DIR,     "",                  COLOR_YELLOW,   COLOR_DEFAULT,  A_NORMAL), \
983 LINE(TREE_FILE,    "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  A_NORMAL), \
984 LINE(STAT_HEAD,    "",                  COLOR_YELLOW,   COLOR_DEFAULT,  0), \
985 LINE(STAT_SECTION, "",                  COLOR_CYAN,     COLOR_DEFAULT,  0), \
986 LINE(STAT_NONE,    "",                  COLOR_DEFAULT,  COLOR_DEFAULT,  0), \
987 LINE(STAT_STAGED,  "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
988 LINE(STAT_UNSTAGED,"",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
989 LINE(STAT_UNTRACKED,"",                 COLOR_MAGENTA,  COLOR_DEFAULT,  0), \
990 LINE(BLAME_ID,     "",                  COLOR_MAGENTA,  COLOR_DEFAULT,  0)
992 enum line_type {
993 #define LINE(type, line, fg, bg, attr) \
994         LINE_##type
995         LINE_INFO,
996         LINE_NONE
997 #undef  LINE
998 };
1000 struct line_info {
1001         const char *name;       /* Option name. */
1002         int namelen;            /* Size of option name. */
1003         const char *line;       /* The start of line to match. */
1004         int linelen;            /* Size of string to match. */
1005         int fg, bg, attr;       /* Color and text attributes for the lines. */
1006 };
1008 static struct line_info line_info[] = {
1009 #define LINE(type, line, fg, bg, attr) \
1010         { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
1011         LINE_INFO
1012 #undef  LINE
1013 };
1015 static enum line_type
1016 get_line_type(const char *line)
1018         int linelen = strlen(line);
1019         enum line_type type;
1021         for (type = 0; type < ARRAY_SIZE(line_info); type++)
1022                 /* Case insensitive search matches Signed-off-by lines better. */
1023                 if (linelen >= line_info[type].linelen &&
1024                     !strncasecmp(line_info[type].line, line, line_info[type].linelen))
1025                         return type;
1027         return LINE_DEFAULT;
1030 static inline int
1031 get_line_attr(enum line_type type)
1033         assert(type < ARRAY_SIZE(line_info));
1034         return COLOR_PAIR(type) | line_info[type].attr;
1037 static struct line_info *
1038 get_line_info(const char *name)
1040         size_t namelen = strlen(name);
1041         enum line_type type;
1043         for (type = 0; type < ARRAY_SIZE(line_info); type++)
1044                 if (namelen == line_info[type].namelen &&
1045                     !string_enum_compare(line_info[type].name, name, namelen))
1046                         return &line_info[type];
1048         return NULL;
1051 static void
1052 init_colors(void)
1054         int default_bg = line_info[LINE_DEFAULT].bg;
1055         int default_fg = line_info[LINE_DEFAULT].fg;
1056         enum line_type type;
1058         start_color();
1060         if (assume_default_colors(default_fg, default_bg) == ERR) {
1061                 default_bg = COLOR_BLACK;
1062                 default_fg = COLOR_WHITE;
1063         }
1065         for (type = 0; type < ARRAY_SIZE(line_info); type++) {
1066                 struct line_info *info = &line_info[type];
1067                 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
1068                 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
1070                 init_pair(type, fg, bg);
1071         }
1074 struct line {
1075         enum line_type type;
1077         /* State flags */
1078         unsigned int selected:1;
1079         unsigned int dirty:1;
1080         unsigned int cleareol:1;
1082         void *data;             /* User data */
1083 };
1086 /*
1087  * Keys
1088  */
1090 struct keybinding {
1091         int alias;
1092         enum request request;
1093 };
1095 static const struct keybinding default_keybindings[] = {
1096         /* View switching */
1097         { 'm',          REQ_VIEW_MAIN },
1098         { 'd',          REQ_VIEW_DIFF },
1099         { 'l',          REQ_VIEW_LOG },
1100         { 't',          REQ_VIEW_TREE },
1101         { 'f',          REQ_VIEW_BLOB },
1102         { 'B',          REQ_VIEW_BLAME },
1103         { 'H',          REQ_VIEW_BRANCH },
1104         { 'p',          REQ_VIEW_PAGER },
1105         { 'h',          REQ_VIEW_HELP },
1106         { 'S',          REQ_VIEW_STATUS },
1107         { 'c',          REQ_VIEW_STAGE },
1109         /* View manipulation */
1110         { 'q',          REQ_VIEW_CLOSE },
1111         { KEY_TAB,      REQ_VIEW_NEXT },
1112         { KEY_RETURN,   REQ_ENTER },
1113         { KEY_UP,       REQ_PREVIOUS },
1114         { KEY_DOWN,     REQ_NEXT },
1115         { 'R',          REQ_REFRESH },
1116         { KEY_F(5),     REQ_REFRESH },
1117         { 'O',          REQ_MAXIMIZE },
1119         /* Cursor navigation */
1120         { 'k',          REQ_MOVE_UP },
1121         { 'j',          REQ_MOVE_DOWN },
1122         { KEY_HOME,     REQ_MOVE_FIRST_LINE },
1123         { KEY_END,      REQ_MOVE_LAST_LINE },
1124         { KEY_NPAGE,    REQ_MOVE_PAGE_DOWN },
1125         { ' ',          REQ_MOVE_PAGE_DOWN },
1126         { KEY_PPAGE,    REQ_MOVE_PAGE_UP },
1127         { 'b',          REQ_MOVE_PAGE_UP },
1128         { '-',          REQ_MOVE_PAGE_UP },
1130         /* Scrolling */
1131         { KEY_LEFT,     REQ_SCROLL_LEFT },
1132         { KEY_RIGHT,    REQ_SCROLL_RIGHT },
1133         { KEY_IC,       REQ_SCROLL_LINE_UP },
1134         { KEY_DC,       REQ_SCROLL_LINE_DOWN },
1135         { 'w',          REQ_SCROLL_PAGE_UP },
1136         { 's',          REQ_SCROLL_PAGE_DOWN },
1138         /* Searching */
1139         { '/',          REQ_SEARCH },
1140         { '?',          REQ_SEARCH_BACK },
1141         { 'n',          REQ_FIND_NEXT },
1142         { 'N',          REQ_FIND_PREV },
1144         /* Misc */
1145         { 'Q',          REQ_QUIT },
1146         { 'z',          REQ_STOP_LOADING },
1147         { 'v',          REQ_SHOW_VERSION },
1148         { 'r',          REQ_SCREEN_REDRAW },
1149         { '.',          REQ_TOGGLE_LINENO },
1150         { 'D',          REQ_TOGGLE_DATE },
1151         { 'A',          REQ_TOGGLE_AUTHOR },
1152         { 'g',          REQ_TOGGLE_REV_GRAPH },
1153         { 'F',          REQ_TOGGLE_REFS },
1154         { 'I',          REQ_TOGGLE_SORT_ORDER },
1155         { 'i',          REQ_TOGGLE_SORT_FIELD },
1156         { ':',          REQ_PROMPT },
1157         { 'u',          REQ_STATUS_UPDATE },
1158         { '!',          REQ_STATUS_REVERT },
1159         { 'M',          REQ_STATUS_MERGE },
1160         { '@',          REQ_STAGE_NEXT },
1161         { ',',          REQ_PARENT },
1162         { 'e',          REQ_EDIT },
1163 };
1165 #define KEYMAP_INFO \
1166         KEYMAP_(GENERIC), \
1167         KEYMAP_(MAIN), \
1168         KEYMAP_(DIFF), \
1169         KEYMAP_(LOG), \
1170         KEYMAP_(TREE), \
1171         KEYMAP_(BLOB), \
1172         KEYMAP_(BLAME), \
1173         KEYMAP_(BRANCH), \
1174         KEYMAP_(PAGER), \
1175         KEYMAP_(HELP), \
1176         KEYMAP_(STATUS), \
1177         KEYMAP_(STAGE)
1179 enum keymap {
1180 #define KEYMAP_(name) KEYMAP_##name
1181         KEYMAP_INFO
1182 #undef  KEYMAP_
1183 };
1185 static const struct enum_map keymap_table[] = {
1186 #define KEYMAP_(name) ENUM_MAP(#name, KEYMAP_##name)
1187         KEYMAP_INFO
1188 #undef  KEYMAP_
1189 };
1191 #define set_keymap(map, name) map_enum(map, keymap_table, name)
1193 struct keybinding_table {
1194         struct keybinding *data;
1195         size_t size;
1196 };
1198 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
1200 static void
1201 add_keybinding(enum keymap keymap, enum request request, int key)
1203         struct keybinding_table *table = &keybindings[keymap];
1205         table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
1206         if (!table->data)
1207                 die("Failed to allocate keybinding");
1208         table->data[table->size].alias = key;
1209         table->data[table->size++].request = request;
1212 /* Looks for a key binding first in the given map, then in the generic map, and
1213  * lastly in the default keybindings. */
1214 static enum request
1215 get_keybinding(enum keymap keymap, int key)
1217         size_t i;
1219         for (i = 0; i < keybindings[keymap].size; i++)
1220                 if (keybindings[keymap].data[i].alias == key)
1221                         return keybindings[keymap].data[i].request;
1223         for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
1224                 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
1225                         return keybindings[KEYMAP_GENERIC].data[i].request;
1227         for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
1228                 if (default_keybindings[i].alias == key)
1229                         return default_keybindings[i].request;
1231         return (enum request) key;
1235 struct key {
1236         const char *name;
1237         int value;
1238 };
1240 static const struct key key_table[] = {
1241         { "Enter",      KEY_RETURN },
1242         { "Space",      ' ' },
1243         { "Backspace",  KEY_BACKSPACE },
1244         { "Tab",        KEY_TAB },
1245         { "Escape",     KEY_ESC },
1246         { "Left",       KEY_LEFT },
1247         { "Right",      KEY_RIGHT },
1248         { "Up",         KEY_UP },
1249         { "Down",       KEY_DOWN },
1250         { "Insert",     KEY_IC },
1251         { "Delete",     KEY_DC },
1252         { "Hash",       '#' },
1253         { "Home",       KEY_HOME },
1254         { "End",        KEY_END },
1255         { "PageUp",     KEY_PPAGE },
1256         { "PageDown",   KEY_NPAGE },
1257         { "F1",         KEY_F(1) },
1258         { "F2",         KEY_F(2) },
1259         { "F3",         KEY_F(3) },
1260         { "F4",         KEY_F(4) },
1261         { "F5",         KEY_F(5) },
1262         { "F6",         KEY_F(6) },
1263         { "F7",         KEY_F(7) },
1264         { "F8",         KEY_F(8) },
1265         { "F9",         KEY_F(9) },
1266         { "F10",        KEY_F(10) },
1267         { "F11",        KEY_F(11) },
1268         { "F12",        KEY_F(12) },
1269 };
1271 static int
1272 get_key_value(const char *name)
1274         int i;
1276         for (i = 0; i < ARRAY_SIZE(key_table); i++)
1277                 if (!strcasecmp(key_table[i].name, name))
1278                         return key_table[i].value;
1280         if (strlen(name) == 1 && isprint(*name))
1281                 return (int) *name;
1283         return ERR;
1286 static const char *
1287 get_key_name(int key_value)
1289         static char key_char[] = "'X'";
1290         const char *seq = NULL;
1291         int key;
1293         for (key = 0; key < ARRAY_SIZE(key_table); key++)
1294                 if (key_table[key].value == key_value)
1295                         seq = key_table[key].name;
1297         if (seq == NULL &&
1298             key_value < 127 &&
1299             isprint(key_value)) {
1300                 key_char[1] = (char) key_value;
1301                 seq = key_char;
1302         }
1304         return seq ? seq : "(no key)";
1307 static const char *
1308 get_key(enum request request)
1310         static char buf[BUFSIZ];
1311         size_t pos = 0;
1312         char *sep = "";
1313         int i;
1315         buf[pos] = 0;
1317         for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
1318                 const struct keybinding *keybinding = &default_keybindings[i];
1320                 if (keybinding->request != request)
1321                         continue;
1323                 if (!string_format_from(buf, &pos, "%s%s", sep,
1324                                         get_key_name(keybinding->alias)))
1325                         return "Too many keybindings!";
1326                 sep = ", ";
1327         }
1329         return buf;
1332 struct run_request {
1333         enum keymap keymap;
1334         int key;
1335         const char *argv[SIZEOF_ARG];
1336 };
1338 static struct run_request *run_request;
1339 static size_t run_requests;
1341 DEFINE_ALLOCATOR(realloc_run_requests, struct run_request, 8)
1343 static enum request
1344 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
1346         struct run_request *req;
1348         if (argc >= ARRAY_SIZE(req->argv) - 1)
1349                 return REQ_NONE;
1351         if (!realloc_run_requests(&run_request, run_requests, 1))
1352                 return REQ_NONE;
1354         req = &run_request[run_requests];
1355         req->keymap = keymap;
1356         req->key = key;
1357         req->argv[0] = NULL;
1359         if (!format_argv(req->argv, argv, FORMAT_NONE))
1360                 return REQ_NONE;
1362         return REQ_NONE + ++run_requests;
1365 static struct run_request *
1366 get_run_request(enum request request)
1368         if (request <= REQ_NONE)
1369                 return NULL;
1370         return &run_request[request - REQ_NONE - 1];
1373 static void
1374 add_builtin_run_requests(void)
1376         const char *cherry_pick[] = { "git", "cherry-pick", "%(commit)", NULL };
1377         const char *commit[] = { "git", "commit", NULL };
1378         const char *gc[] = { "git", "gc", NULL };
1379         struct {
1380                 enum keymap keymap;
1381                 int key;
1382                 int argc;
1383                 const char **argv;
1384         } reqs[] = {
1385                 { KEYMAP_MAIN,    'C', ARRAY_SIZE(cherry_pick) - 1, cherry_pick },
1386                 { KEYMAP_STATUS,  'C', ARRAY_SIZE(commit) - 1, commit },
1387                 { KEYMAP_GENERIC, 'G', ARRAY_SIZE(gc) - 1, gc },
1388         };
1389         int i;
1391         for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1392                 enum request req;
1394                 req = add_run_request(reqs[i].keymap, reqs[i].key, reqs[i].argc, reqs[i].argv);
1395                 if (req != REQ_NONE)
1396                         add_keybinding(reqs[i].keymap, req, reqs[i].key);
1397         }
1400 /*
1401  * User config file handling.
1402  */
1404 static int   config_lineno;
1405 static bool  config_errors;
1406 static const char *config_msg;
1408 static const struct enum_map color_map[] = {
1409 #define COLOR_MAP(name) ENUM_MAP(#name, COLOR_##name)
1410         COLOR_MAP(DEFAULT),
1411         COLOR_MAP(BLACK),
1412         COLOR_MAP(BLUE),
1413         COLOR_MAP(CYAN),
1414         COLOR_MAP(GREEN),
1415         COLOR_MAP(MAGENTA),
1416         COLOR_MAP(RED),
1417         COLOR_MAP(WHITE),
1418         COLOR_MAP(YELLOW),
1419 };
1421 static const struct enum_map attr_map[] = {
1422 #define ATTR_MAP(name) ENUM_MAP(#name, A_##name)
1423         ATTR_MAP(NORMAL),
1424         ATTR_MAP(BLINK),
1425         ATTR_MAP(BOLD),
1426         ATTR_MAP(DIM),
1427         ATTR_MAP(REVERSE),
1428         ATTR_MAP(STANDOUT),
1429         ATTR_MAP(UNDERLINE),
1430 };
1432 #define set_attribute(attr, name)       map_enum(attr, attr_map, name)
1434 static int parse_step(double *opt, const char *arg)
1436         *opt = atoi(arg);
1437         if (!strchr(arg, '%'))
1438                 return OK;
1440         /* "Shift down" so 100% and 1 does not conflict. */
1441         *opt = (*opt - 1) / 100;
1442         if (*opt >= 1.0) {
1443                 *opt = 0.99;
1444                 config_msg = "Step value larger than 100%";
1445                 return ERR;
1446         }
1447         if (*opt < 0.0) {
1448                 *opt = 1;
1449                 config_msg = "Invalid step value";
1450                 return ERR;
1451         }
1452         return OK;
1455 static int
1456 parse_int(int *opt, const char *arg, int min, int max)
1458         int value = atoi(arg);
1460         if (min <= value && value <= max) {
1461                 *opt = value;
1462                 return OK;
1463         }
1465         config_msg = "Integer value out of bound";
1466         return ERR;
1469 static bool
1470 set_color(int *color, const char *name)
1472         if (map_enum(color, color_map, name))
1473                 return TRUE;
1474         if (!prefixcmp(name, "color"))
1475                 return parse_int(color, name + 5, 0, 255) == OK;
1476         return FALSE;
1479 /* Wants: object fgcolor bgcolor [attribute] */
1480 static int
1481 option_color_command(int argc, const char *argv[])
1483         struct line_info *info;
1485         if (argc != 3 && argc != 4) {
1486                 config_msg = "Wrong number of arguments given to color command";
1487                 return ERR;
1488         }
1490         info = get_line_info(argv[0]);
1491         if (!info) {
1492                 static const struct enum_map obsolete[] = {
1493                         ENUM_MAP("main-delim",  LINE_DELIMITER),
1494                         ENUM_MAP("main-date",   LINE_DATE),
1495                         ENUM_MAP("main-author", LINE_AUTHOR),
1496                 };
1497                 int index;
1499                 if (!map_enum(&index, obsolete, argv[0])) {
1500                         config_msg = "Unknown color name";
1501                         return ERR;
1502                 }
1503                 info = &line_info[index];
1504         }
1506         if (!set_color(&info->fg, argv[1]) ||
1507             !set_color(&info->bg, argv[2])) {
1508                 config_msg = "Unknown color";
1509                 return ERR;
1510         }
1512         if (argc == 4 && !set_attribute(&info->attr, argv[3])) {
1513                 config_msg = "Unknown attribute";
1514                 return ERR;
1515         }
1517         return OK;
1520 static int parse_bool(bool *opt, const char *arg)
1522         *opt = (!strcmp(arg, "1") || !strcmp(arg, "true") || !strcmp(arg, "yes"))
1523                 ? TRUE : FALSE;
1524         return OK;
1527 static int
1528 parse_string(char *opt, const char *arg, size_t optsize)
1530         int arglen = strlen(arg);
1532         switch (arg[0]) {
1533         case '\"':
1534         case '\'':
1535                 if (arglen == 1 || arg[arglen - 1] != arg[0]) {
1536                         config_msg = "Unmatched quotation";
1537                         return ERR;
1538                 }
1539                 arg += 1; arglen -= 2;
1540         default:
1541                 string_ncopy_do(opt, optsize, arg, arglen);
1542                 return OK;
1543         }
1546 /* Wants: name = value */
1547 static int
1548 option_set_command(int argc, const char *argv[])
1550         if (argc != 3) {
1551                 config_msg = "Wrong number of arguments given to set command";
1552                 return ERR;
1553         }
1555         if (strcmp(argv[1], "=")) {
1556                 config_msg = "No value assigned";
1557                 return ERR;
1558         }
1560         if (!strcmp(argv[0], "show-author"))
1561                 return parse_bool(&opt_author, argv[2]);
1563         if (!strcmp(argv[0], "show-date"))
1564                 return parse_bool(&opt_date, argv[2]);
1566         if (!strcmp(argv[0], "show-rev-graph"))
1567                 return parse_bool(&opt_rev_graph, argv[2]);
1569         if (!strcmp(argv[0], "show-refs"))
1570                 return parse_bool(&opt_show_refs, argv[2]);
1572         if (!strcmp(argv[0], "show-line-numbers"))
1573                 return parse_bool(&opt_line_number, argv[2]);
1575         if (!strcmp(argv[0], "line-graphics"))
1576                 return parse_bool(&opt_line_graphics, argv[2]);
1578         if (!strcmp(argv[0], "line-number-interval"))
1579                 return parse_int(&opt_num_interval, argv[2], 1, 1024);
1581         if (!strcmp(argv[0], "author-width"))
1582                 return parse_int(&opt_author_cols, argv[2], 0, 1024);
1584         if (!strcmp(argv[0], "horizontal-scroll"))
1585                 return parse_step(&opt_hscroll, argv[2]);
1587         if (!strcmp(argv[0], "tab-size"))
1588                 return parse_int(&opt_tab_size, argv[2], 1, 1024);
1590         if (!strcmp(argv[0], "commit-encoding"))
1591                 return parse_string(opt_encoding, argv[2], sizeof(opt_encoding));
1593         config_msg = "Unknown variable name";
1594         return ERR;
1597 /* Wants: mode request key */
1598 static int
1599 option_bind_command(int argc, const char *argv[])
1601         enum request request;
1602         int keymap;
1603         int key;
1605         if (argc < 3) {
1606                 config_msg = "Wrong number of arguments given to bind command";
1607                 return ERR;
1608         }
1610         if (set_keymap(&keymap, argv[0]) == ERR) {
1611                 config_msg = "Unknown key map";
1612                 return ERR;
1613         }
1615         key = get_key_value(argv[1]);
1616         if (key == ERR) {
1617                 config_msg = "Unknown key";
1618                 return ERR;
1619         }
1621         request = get_request(argv[2]);
1622         if (request == REQ_NONE) {
1623                 static const struct enum_map obsolete[] = {
1624                         ENUM_MAP("cherry-pick",         REQ_NONE),
1625                         ENUM_MAP("screen-resize",       REQ_NONE),
1626                         ENUM_MAP("tree-parent",         REQ_PARENT),
1627                 };
1628                 int alias;
1630                 if (map_enum(&alias, obsolete, argv[2])) {
1631                         if (alias != REQ_NONE)
1632                                 add_keybinding(keymap, alias, key);
1633                         config_msg = "Obsolete request name";
1634                         return ERR;
1635                 }
1636         }
1637         if (request == REQ_NONE && *argv[2]++ == '!')
1638                 request = add_run_request(keymap, key, argc - 2, argv + 2);
1639         if (request == REQ_NONE) {
1640                 config_msg = "Unknown request name";
1641                 return ERR;
1642         }
1644         add_keybinding(keymap, request, key);
1646         return OK;
1649 static int
1650 set_option(const char *opt, char *value)
1652         const char *argv[SIZEOF_ARG];
1653         int argc = 0;
1655         if (!argv_from_string(argv, &argc, value)) {
1656                 config_msg = "Too many option arguments";
1657                 return ERR;
1658         }
1660         if (!strcmp(opt, "color"))
1661                 return option_color_command(argc, argv);
1663         if (!strcmp(opt, "set"))
1664                 return option_set_command(argc, argv);
1666         if (!strcmp(opt, "bind"))
1667                 return option_bind_command(argc, argv);
1669         config_msg = "Unknown option command";
1670         return ERR;
1673 static int
1674 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1676         int status = OK;
1678         config_lineno++;
1679         config_msg = "Internal error";
1681         /* Check for comment markers, since read_properties() will
1682          * only ensure opt and value are split at first " \t". */
1683         optlen = strcspn(opt, "#");
1684         if (optlen == 0)
1685                 return OK;
1687         if (opt[optlen] != 0) {
1688                 config_msg = "No option value";
1689                 status = ERR;
1691         }  else {
1692                 /* Look for comment endings in the value. */
1693                 size_t len = strcspn(value, "#");
1695                 if (len < valuelen) {
1696                         valuelen = len;
1697                         value[valuelen] = 0;
1698                 }
1700                 status = set_option(opt, value);
1701         }
1703         if (status == ERR) {
1704                 warn("Error on line %d, near '%.*s': %s",
1705                      config_lineno, (int) optlen, opt, config_msg);
1706                 config_errors = TRUE;
1707         }
1709         /* Always keep going if errors are encountered. */
1710         return OK;
1713 static void
1714 load_option_file(const char *path)
1716         struct io io = {};
1718         /* It's OK that the file doesn't exist. */
1719         if (!io_open(&io, path))
1720                 return;
1722         config_lineno = 0;
1723         config_errors = FALSE;
1725         if (io_load(&io, " \t", read_option) == ERR ||
1726             config_errors == TRUE)
1727                 warn("Errors while loading %s.", path);
1730 static int
1731 load_options(void)
1733         const char *home = getenv("HOME");
1734         const char *tigrc_user = getenv("TIGRC_USER");
1735         const char *tigrc_system = getenv("TIGRC_SYSTEM");
1736         char buf[SIZEOF_STR];
1738         add_builtin_run_requests();
1740         if (!tigrc_system)
1741                 tigrc_system = SYSCONFDIR "/tigrc";
1742         load_option_file(tigrc_system);
1744         if (!tigrc_user) {
1745                 if (!home || !string_format(buf, "%s/.tigrc", home))
1746                         return ERR;
1747                 tigrc_user = buf;
1748         }
1749         load_option_file(tigrc_user);
1751         return OK;
1755 /*
1756  * The viewer
1757  */
1759 struct view;
1760 struct view_ops;
1762 /* The display array of active views and the index of the current view. */
1763 static struct view *display[2];
1764 static unsigned int current_view;
1766 #define foreach_displayed_view(view, i) \
1767         for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1769 #define displayed_views()       (display[1] != NULL ? 2 : 1)
1771 /* Current head and commit ID */
1772 static char ref_blob[SIZEOF_REF]        = "";
1773 static char ref_commit[SIZEOF_REF]      = "HEAD";
1774 static char ref_head[SIZEOF_REF]        = "HEAD";
1776 struct view {
1777         const char *name;       /* View name */
1778         const char *cmd_env;    /* Command line set via environment */
1779         const char *id;         /* Points to either of ref_{head,commit,blob} */
1781         struct view_ops *ops;   /* View operations */
1783         enum keymap keymap;     /* What keymap does this view have */
1784         bool git_dir;           /* Whether the view requires a git directory. */
1786         char ref[SIZEOF_REF];   /* Hovered commit reference */
1787         char vid[SIZEOF_REF];   /* View ID. Set to id member when updating. */
1789         int height, width;      /* The width and height of the main window */
1790         WINDOW *win;            /* The main window */
1791         WINDOW *title;          /* The title window living below the main window */
1793         /* Navigation */
1794         unsigned long offset;   /* Offset of the window top */
1795         unsigned long yoffset;  /* Offset from the window side. */
1796         unsigned long lineno;   /* Current line number */
1797         unsigned long p_offset; /* Previous offset of the window top */
1798         unsigned long p_yoffset;/* Previous offset from the window side */
1799         unsigned long p_lineno; /* Previous current line number */
1800         bool p_restore;         /* Should the previous position be restored. */
1802         /* Searching */
1803         char grep[SIZEOF_STR];  /* Search string */
1804         regex_t *regex;         /* Pre-compiled regexp */
1806         /* If non-NULL, points to the view that opened this view. If this view
1807          * is closed tig will switch back to the parent view. */
1808         struct view *parent;
1810         /* Buffering */
1811         size_t lines;           /* Total number of lines */
1812         struct line *line;      /* Line index */
1813         unsigned int digits;    /* Number of digits in the lines member. */
1815         /* Drawing */
1816         struct line *curline;   /* Line currently being drawn. */
1817         enum line_type curtype; /* Attribute currently used for drawing. */
1818         unsigned long col;      /* Column when drawing. */
1819         bool has_scrolled;      /* View was scrolled. */
1821         /* Loading */
1822         struct io io;
1823         struct io *pipe;
1824         time_t start_time;
1825         time_t update_secs;
1826 };
1828 struct view_ops {
1829         /* What type of content being displayed. Used in the title bar. */
1830         const char *type;
1831         /* Default command arguments. */
1832         const char **argv;
1833         /* Open and reads in all view content. */
1834         bool (*open)(struct view *view);
1835         /* Read one line; updates view->line. */
1836         bool (*read)(struct view *view, char *data);
1837         /* Draw one line; @lineno must be < view->height. */
1838         bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1839         /* Depending on view handle a special requests. */
1840         enum request (*request)(struct view *view, enum request request, struct line *line);
1841         /* Search for regexp in a line. */
1842         bool (*grep)(struct view *view, struct line *line);
1843         /* Select line */
1844         void (*select)(struct view *view, struct line *line);
1845 };
1847 static struct view_ops blame_ops;
1848 static struct view_ops blob_ops;
1849 static struct view_ops diff_ops;
1850 static struct view_ops help_ops;
1851 static struct view_ops log_ops;
1852 static struct view_ops main_ops;
1853 static struct view_ops pager_ops;
1854 static struct view_ops stage_ops;
1855 static struct view_ops status_ops;
1856 static struct view_ops tree_ops;
1857 static struct view_ops branch_ops;
1859 #define VIEW_STR(name, env, ref, ops, map, git) \
1860         { name, #env, ref, ops, map, git }
1862 #define VIEW_(id, name, ops, git, ref) \
1863         VIEW_STR(name, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1866 static struct view views[] = {
1867         VIEW_(MAIN,   "main",   &main_ops,   TRUE,  ref_head),
1868         VIEW_(DIFF,   "diff",   &diff_ops,   TRUE,  ref_commit),
1869         VIEW_(LOG,    "log",    &log_ops,    TRUE,  ref_head),
1870         VIEW_(TREE,   "tree",   &tree_ops,   TRUE,  ref_commit),
1871         VIEW_(BLOB,   "blob",   &blob_ops,   TRUE,  ref_blob),
1872         VIEW_(BLAME,  "blame",  &blame_ops,  TRUE,  ref_commit),
1873         VIEW_(BRANCH, "branch", &branch_ops, TRUE,  ref_head),
1874         VIEW_(HELP,   "help",   &help_ops,   FALSE, ""),
1875         VIEW_(PAGER,  "pager",  &pager_ops,  FALSE, "stdin"),
1876         VIEW_(STATUS, "status", &status_ops, TRUE,  ""),
1877         VIEW_(STAGE,  "stage",  &stage_ops,  TRUE,  ""),
1878 };
1880 #define VIEW(req)       (&views[(req) - REQ_OFFSET - 1])
1881 #define VIEW_REQ(view)  ((view) - views + REQ_OFFSET + 1)
1883 #define foreach_view(view, i) \
1884         for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1886 #define view_is_displayed(view) \
1887         (view == display[0] || view == display[1])
1890 enum line_graphic {
1891         LINE_GRAPHIC_VLINE
1892 };
1894 static chtype line_graphics[] = {
1895         /* LINE_GRAPHIC_VLINE: */ '|'
1896 };
1898 static inline void
1899 set_view_attr(struct view *view, enum line_type type)
1901         if (!view->curline->selected && view->curtype != type) {
1902                 wattrset(view->win, get_line_attr(type));
1903                 wchgat(view->win, -1, 0, type, NULL);
1904                 view->curtype = type;
1905         }
1908 static int
1909 draw_chars(struct view *view, enum line_type type, const char *string,
1910            int max_len, bool use_tilde)
1912         int len = 0;
1913         int col = 0;
1914         int trimmed = FALSE;
1915         size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1917         if (max_len <= 0)
1918                 return 0;
1920         if (opt_utf8) {
1921                 len = utf8_length(&string, skip, &col, max_len, &trimmed, use_tilde);
1922         } else {
1923                 col = len = strlen(string);
1924                 if (len > max_len) {
1925                         if (use_tilde) {
1926                                 max_len -= 1;
1927                         }
1928                         col = len = max_len;
1929                         trimmed = TRUE;
1930                 }
1931         }
1933         set_view_attr(view, type);
1934         if (len > 0)
1935                 waddnstr(view->win, string, len);
1936         if (trimmed && use_tilde) {
1937                 set_view_attr(view, LINE_DELIMITER);
1938                 waddch(view->win, '~');
1939                 col++;
1940         }
1942         return col;
1945 static int
1946 draw_space(struct view *view, enum line_type type, int max, int spaces)
1948         static char space[] = "                    ";
1949         int col = 0;
1951         spaces = MIN(max, spaces);
1953         while (spaces > 0) {
1954                 int len = MIN(spaces, sizeof(space) - 1);
1956                 col += draw_chars(view, type, space, len, FALSE);
1957                 spaces -= len;
1958         }
1960         return col;
1963 static bool
1964 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1966         view->col += draw_chars(view, type, string, view->width + view->yoffset - view->col, trim);
1967         return view->width + view->yoffset <= view->col;
1970 static bool
1971 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1973         size_t skip = view->yoffset > view->col ? view->yoffset - view->col : 0;
1974         int max = view->width + view->yoffset - view->col;
1975         int i;
1977         if (max < size)
1978                 size = max;
1980         set_view_attr(view, type);
1981         /* Using waddch() instead of waddnstr() ensures that
1982          * they'll be rendered correctly for the cursor line. */
1983         for (i = skip; i < size; i++)
1984                 waddch(view->win, graphic[i]);
1986         view->col += size;
1987         if (size < max && skip <= size)
1988                 waddch(view->win, ' ');
1989         view->col++;
1991         return view->width + view->yoffset <= view->col;
1994 static bool
1995 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1997         int max = MIN(view->width + view->yoffset - view->col, len);
1998         int col;
2000         if (text)
2001                 col = draw_chars(view, type, text, max - 1, trim);
2002         else
2003                 col = draw_space(view, type, max - 1, max - 1);
2005         view->col += col;
2006         view->col += draw_space(view, LINE_DEFAULT, max - col, max - col);
2007         return view->width + view->yoffset <= view->col;
2010 static bool
2011 draw_date(struct view *view, time_t *time)
2013         const char *date = mkdate(time);
2015         return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
2018 static bool
2019 draw_author(struct view *view, const char *author)
2021         bool trim = opt_author_cols == 0 || opt_author_cols > 5 || !author;
2023         if (!trim) {
2024                 static char initials[10];
2025                 size_t pos;
2027 #define is_initial_sep(c) (isspace(c) || ispunct(c) || (c) == '@')
2029                 memset(initials, 0, sizeof(initials));
2030                 for (pos = 0; *author && pos < opt_author_cols - 1; author++, pos++) {
2031                         while (is_initial_sep(*author))
2032                                 author++;
2033                         strncpy(&initials[pos], author, sizeof(initials) - 1 - pos);
2034                         while (*author && !is_initial_sep(author[1]))
2035                                 author++;
2036                 }
2038                 author = initials;
2039         }
2041         return draw_field(view, LINE_AUTHOR, author, opt_author_cols, trim);
2044 static bool
2045 draw_mode(struct view *view, mode_t mode)
2047         const char *str;
2049         if (S_ISDIR(mode))
2050                 str = "drwxr-xr-x";
2051         else if (S_ISLNK(mode))
2052                 str = "lrwxrwxrwx";
2053         else if (S_ISGITLINK(mode))
2054                 str = "m---------";
2055         else if (S_ISREG(mode) && mode & S_IXUSR)
2056                 str = "-rwxr-xr-x";
2057         else if (S_ISREG(mode))
2058                 str = "-rw-r--r--";
2059         else
2060                 str = "----------";
2062         return draw_field(view, LINE_MODE, str, STRING_SIZE("-rw-r--r-- "), FALSE);
2065 static bool
2066 draw_lineno(struct view *view, unsigned int lineno)
2068         char number[10];
2069         int digits3 = view->digits < 3 ? 3 : view->digits;
2070         int max = MIN(view->width + view->yoffset - view->col, digits3);
2071         char *text = NULL;
2073         lineno += view->offset + 1;
2074         if (lineno == 1 || (lineno % opt_num_interval) == 0) {
2075                 static char fmt[] = "%1ld";
2077                 fmt[1] = '0' + (view->digits <= 9 ? digits3 : 1);
2078                 if (string_format(number, fmt, lineno))
2079                         text = number;
2080         }
2081         if (text)
2082                 view->col += draw_chars(view, LINE_LINE_NUMBER, text, max, TRUE);
2083         else
2084                 view->col += draw_space(view, LINE_LINE_NUMBER, max, digits3);
2085         return draw_graphic(view, LINE_DEFAULT, &line_graphics[LINE_GRAPHIC_VLINE], 1);
2088 static bool
2089 draw_view_line(struct view *view, unsigned int lineno)
2091         struct line *line;
2092         bool selected = (view->offset + lineno == view->lineno);
2094         assert(view_is_displayed(view));
2096         if (view->offset + lineno >= view->lines)
2097                 return FALSE;
2099         line = &view->line[view->offset + lineno];
2101         wmove(view->win, lineno, 0);
2102         if (line->cleareol)
2103                 wclrtoeol(view->win);
2104         view->col = 0;
2105         view->curline = line;
2106         view->curtype = LINE_NONE;
2107         line->selected = FALSE;
2108         line->dirty = line->cleareol = 0;
2110         if (selected) {
2111                 set_view_attr(view, LINE_CURSOR);
2112                 line->selected = TRUE;
2113                 view->ops->select(view, line);
2114         }
2116         return view->ops->draw(view, line, lineno);
2119 static void
2120 redraw_view_dirty(struct view *view)
2122         bool dirty = FALSE;
2123         int lineno;
2125         for (lineno = 0; lineno < view->height; lineno++) {
2126                 if (view->offset + lineno >= view->lines)
2127                         break;
2128                 if (!view->line[view->offset + lineno].dirty)
2129                         continue;
2130                 dirty = TRUE;
2131                 if (!draw_view_line(view, lineno))
2132                         break;
2133         }
2135         if (!dirty)
2136                 return;
2137         wnoutrefresh(view->win);
2140 static void
2141 redraw_view_from(struct view *view, int lineno)
2143         assert(0 <= lineno && lineno < view->height);
2145         for (; lineno < view->height; lineno++) {
2146                 if (!draw_view_line(view, lineno))
2147                         break;
2148         }
2150         wnoutrefresh(view->win);
2153 static void
2154 redraw_view(struct view *view)
2156         werase(view->win);
2157         redraw_view_from(view, 0);
2161 static void
2162 update_view_title(struct view *view)
2164         char buf[SIZEOF_STR];
2165         char state[SIZEOF_STR];
2166         size_t bufpos = 0, statelen = 0;
2168         assert(view_is_displayed(view));
2170         if (view != VIEW(REQ_VIEW_STATUS) && view->lines) {
2171                 unsigned int view_lines = view->offset + view->height;
2172                 unsigned int lines = view->lines
2173                                    ? MIN(view_lines, view->lines) * 100 / view->lines
2174                                    : 0;
2176                 string_format_from(state, &statelen, " - %s %d of %d (%d%%)",
2177                                    view->ops->type,
2178                                    view->lineno + 1,
2179                                    view->lines,
2180                                    lines);
2182         }
2184         if (view->pipe) {
2185                 time_t secs = time(NULL) - view->start_time;
2187                 /* Three git seconds are a long time ... */
2188                 if (secs > 2)
2189                         string_format_from(state, &statelen, " loading %lds", secs);
2190         }
2192         string_format_from(buf, &bufpos, "[%s]", view->name);
2193         if (*view->ref && bufpos < view->width) {
2194                 size_t refsize = strlen(view->ref);
2195                 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
2197                 if (minsize < view->width)
2198                         refsize = view->width - minsize + 7;
2199                 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
2200         }
2202         if (statelen && bufpos < view->width) {
2203                 string_format_from(buf, &bufpos, "%s", state);
2204         }
2206         if (view == display[current_view])
2207                 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
2208         else
2209                 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
2211         mvwaddnstr(view->title, 0, 0, buf, bufpos);
2212         wclrtoeol(view->title);
2213         wnoutrefresh(view->title);
2216 static void
2217 resize_display(void)
2219         int offset, i;
2220         struct view *base = display[0];
2221         struct view *view = display[1] ? display[1] : display[0];
2223         /* Setup window dimensions */
2225         getmaxyx(stdscr, base->height, base->width);
2227         /* Make room for the status window. */
2228         base->height -= 1;
2230         if (view != base) {
2231                 /* Horizontal split. */
2232                 view->width   = base->width;
2233                 view->height  = SCALE_SPLIT_VIEW(base->height);
2234                 base->height -= view->height;
2236                 /* Make room for the title bar. */
2237                 view->height -= 1;
2238         }
2240         /* Make room for the title bar. */
2241         base->height -= 1;
2243         offset = 0;
2245         foreach_displayed_view (view, i) {
2246                 if (!view->win) {
2247                         view->win = newwin(view->height, 0, offset, 0);
2248                         if (!view->win)
2249                                 die("Failed to create %s view", view->name);
2251                         scrollok(view->win, FALSE);
2253                         view->title = newwin(1, 0, offset + view->height, 0);
2254                         if (!view->title)
2255                                 die("Failed to create title window");
2257                 } else {
2258                         wresize(view->win, view->height, view->width);
2259                         mvwin(view->win,   offset, 0);
2260                         mvwin(view->title, offset + view->height, 0);
2261                 }
2263                 offset += view->height + 1;
2264         }
2267 static void
2268 redraw_display(bool clear)
2270         struct view *view;
2271         int i;
2273         foreach_displayed_view (view, i) {
2274                 if (clear)
2275                         wclear(view->win);
2276                 redraw_view(view);
2277                 update_view_title(view);
2278         }
2281 static void
2282 toggle_view_option(bool *option, const char *help)
2284         *option = !*option;
2285         redraw_display(FALSE);
2286         report("%sabling %s", *option ? "En" : "Dis", help);
2289 static void
2290 maximize_view(struct view *view)
2292         memset(display, 0, sizeof(display));
2293         current_view = 0;
2294         display[current_view] = view;
2295         resize_display();
2296         redraw_display(FALSE);
2297         report("");
2301 /*
2302  * Navigation
2303  */
2305 static bool
2306 goto_view_line(struct view *view, unsigned long offset, unsigned long lineno)
2308         if (lineno >= view->lines)
2309                 lineno = view->lines > 0 ? view->lines - 1 : 0;
2311         if (offset > lineno || offset + view->height <= lineno) {
2312                 unsigned long half = view->height / 2;
2314                 if (lineno > half)
2315                         offset = lineno - half;
2316                 else
2317                         offset = 0;
2318         }
2320         if (offset != view->offset || lineno != view->lineno) {
2321                 view->offset = offset;
2322                 view->lineno = lineno;
2323                 return TRUE;
2324         }
2326         return FALSE;
2329 static int
2330 apply_step(double step, int value)
2332         if (step >= 1)
2333                 return (int) step;
2334         value *= step + 0.01;
2335         return value ? value : 1;
2338 /* Scrolling backend */
2339 static void
2340 do_scroll_view(struct view *view, int lines)
2342         bool redraw_current_line = FALSE;
2344         /* The rendering expects the new offset. */
2345         view->offset += lines;
2347         assert(0 <= view->offset && view->offset < view->lines);
2348         assert(lines);
2350         /* Move current line into the view. */
2351         if (view->lineno < view->offset) {
2352                 view->lineno = view->offset;
2353                 redraw_current_line = TRUE;
2354         } else if (view->lineno >= view->offset + view->height) {
2355                 view->lineno = view->offset + view->height - 1;
2356                 redraw_current_line = TRUE;
2357         }
2359         assert(view->offset <= view->lineno && view->lineno < view->lines);
2361         /* Redraw the whole screen if scrolling is pointless. */
2362         if (view->height < ABS(lines)) {
2363                 redraw_view(view);
2365         } else {
2366                 int line = lines > 0 ? view->height - lines : 0;
2367                 int end = line + ABS(lines);
2369                 scrollok(view->win, TRUE);
2370                 wscrl(view->win, lines);
2371                 scrollok(view->win, FALSE);
2373                 while (line < end && draw_view_line(view, line))
2374                         line++;
2376                 if (redraw_current_line)
2377                         draw_view_line(view, view->lineno - view->offset);
2378                 wnoutrefresh(view->win);
2379         }
2381         view->has_scrolled = TRUE;
2382         report("");
2385 /* Scroll frontend */
2386 static void
2387 scroll_view(struct view *view, enum request request)
2389         int lines = 1;
2391         assert(view_is_displayed(view));
2393         switch (request) {
2394         case REQ_SCROLL_LEFT:
2395                 if (view->yoffset == 0) {
2396                         report("Cannot scroll beyond the first column");
2397                         return;
2398                 }
2399                 if (view->yoffset <= apply_step(opt_hscroll, view->width))
2400                         view->yoffset = 0;
2401                 else
2402                         view->yoffset -= apply_step(opt_hscroll, view->width);
2403                 redraw_view_from(view, 0);
2404                 report("");
2405                 return;
2406         case REQ_SCROLL_RIGHT:
2407                 view->yoffset += apply_step(opt_hscroll, view->width);
2408                 redraw_view(view);
2409                 report("");
2410                 return;
2411         case REQ_SCROLL_PAGE_DOWN:
2412                 lines = view->height;
2413         case REQ_SCROLL_LINE_DOWN:
2414                 if (view->offset + lines > view->lines)
2415                         lines = view->lines - view->offset;
2417                 if (lines == 0 || view->offset + view->height >= view->lines) {
2418                         report("Cannot scroll beyond the last line");
2419                         return;
2420                 }
2421                 break;
2423         case REQ_SCROLL_PAGE_UP:
2424                 lines = view->height;
2425         case REQ_SCROLL_LINE_UP:
2426                 if (lines > view->offset)
2427                         lines = view->offset;
2429                 if (lines == 0) {
2430                         report("Cannot scroll beyond the first line");
2431                         return;
2432                 }
2434                 lines = -lines;
2435                 break;
2437         default:
2438                 die("request %d not handled in switch", request);
2439         }
2441         do_scroll_view(view, lines);
2444 /* Cursor moving */
2445 static void
2446 move_view(struct view *view, enum request request)
2448         int scroll_steps = 0;
2449         int steps;
2451         switch (request) {
2452         case REQ_MOVE_FIRST_LINE:
2453                 steps = -view->lineno;
2454                 break;
2456         case REQ_MOVE_LAST_LINE:
2457                 steps = view->lines - view->lineno - 1;
2458                 break;
2460         case REQ_MOVE_PAGE_UP:
2461                 steps = view->height > view->lineno
2462                       ? -view->lineno : -view->height;
2463                 break;
2465         case REQ_MOVE_PAGE_DOWN:
2466                 steps = view->lineno + view->height >= view->lines
2467                       ? view->lines - view->lineno - 1 : view->height;
2468                 break;
2470         case REQ_MOVE_UP:
2471                 steps = -1;
2472                 break;
2474         case REQ_MOVE_DOWN:
2475                 steps = 1;
2476                 break;
2478         default:
2479                 die("request %d not handled in switch", request);
2480         }
2482         if (steps <= 0 && view->lineno == 0) {
2483                 report("Cannot move beyond the first line");
2484                 return;
2486         } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2487                 report("Cannot move beyond the last line");
2488                 return;
2489         }
2491         /* Move the current line */
2492         view->lineno += steps;
2493         assert(0 <= view->lineno && view->lineno < view->lines);
2495         /* Check whether the view needs to be scrolled */
2496         if (view->lineno < view->offset ||
2497             view->lineno >= view->offset + view->height) {
2498                 scroll_steps = steps;
2499                 if (steps < 0 && -steps > view->offset) {
2500                         scroll_steps = -view->offset;
2502                 } else if (steps > 0) {
2503                         if (view->lineno == view->lines - 1 &&
2504                             view->lines > view->height) {
2505                                 scroll_steps = view->lines - view->offset - 1;
2506                                 if (scroll_steps >= view->height)
2507                                         scroll_steps -= view->height - 1;
2508                         }
2509                 }
2510         }
2512         if (!view_is_displayed(view)) {
2513                 view->offset += scroll_steps;
2514                 assert(0 <= view->offset && view->offset < view->lines);
2515                 view->ops->select(view, &view->line[view->lineno]);
2516                 return;
2517         }
2519         /* Repaint the old "current" line if we be scrolling */
2520         if (ABS(steps) < view->height)
2521                 draw_view_line(view, view->lineno - steps - view->offset);
2523         if (scroll_steps) {
2524                 do_scroll_view(view, scroll_steps);
2525                 return;
2526         }
2528         /* Draw the current line */
2529         draw_view_line(view, view->lineno - view->offset);
2531         wnoutrefresh(view->win);
2532         report("");
2536 /*
2537  * Searching
2538  */
2540 static void search_view(struct view *view, enum request request);
2542 static bool
2543 grep_text(struct view *view, const char *text[])
2545         regmatch_t pmatch;
2546         size_t i;
2548         for (i = 0; text[i]; i++)
2549                 if (*text[i] &&
2550                     regexec(view->regex, text[i], 1, &pmatch, 0) != REG_NOMATCH)
2551                         return TRUE;
2552         return FALSE;
2555 static void
2556 select_view_line(struct view *view, unsigned long lineno)
2558         unsigned long old_lineno = view->lineno;
2559         unsigned long old_offset = view->offset;
2561         if (goto_view_line(view, view->offset, lineno)) {
2562                 if (view_is_displayed(view)) {
2563                         if (old_offset != view->offset) {
2564                                 redraw_view(view);
2565                         } else {
2566                                 draw_view_line(view, old_lineno - view->offset);
2567                                 draw_view_line(view, view->lineno - view->offset);
2568                                 wnoutrefresh(view->win);
2569                         }
2570                 } else {
2571                         view->ops->select(view, &view->line[view->lineno]);
2572                 }
2573         }
2576 static void
2577 find_next(struct view *view, enum request request)
2579         unsigned long lineno = view->lineno;
2580         int direction;
2582         if (!*view->grep) {
2583                 if (!*opt_search)
2584                         report("No previous search");
2585                 else
2586                         search_view(view, request);
2587                 return;
2588         }
2590         switch (request) {
2591         case REQ_SEARCH:
2592         case REQ_FIND_NEXT:
2593                 direction = 1;
2594                 break;
2596         case REQ_SEARCH_BACK:
2597         case REQ_FIND_PREV:
2598                 direction = -1;
2599                 break;
2601         default:
2602                 return;
2603         }
2605         if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2606                 lineno += direction;
2608         /* Note, lineno is unsigned long so will wrap around in which case it
2609          * will become bigger than view->lines. */
2610         for (; lineno < view->lines; lineno += direction) {
2611                 if (view->ops->grep(view, &view->line[lineno])) {
2612                         select_view_line(view, lineno);
2613                         report("Line %ld matches '%s'", lineno + 1, view->grep);
2614                         return;
2615                 }
2616         }
2618         report("No match found for '%s'", view->grep);
2621 static void
2622 search_view(struct view *view, enum request request)
2624         int regex_err;
2626         if (view->regex) {
2627                 regfree(view->regex);
2628                 *view->grep = 0;
2629         } else {
2630                 view->regex = calloc(1, sizeof(*view->regex));
2631                 if (!view->regex)
2632                         return;
2633         }
2635         regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2636         if (regex_err != 0) {
2637                 char buf[SIZEOF_STR] = "unknown error";
2639                 regerror(regex_err, view->regex, buf, sizeof(buf));
2640                 report("Search failed: %s", buf);
2641                 return;
2642         }
2644         string_copy(view->grep, opt_search);
2646         find_next(view, request);
2649 /*
2650  * Incremental updating
2651  */
2653 static void
2654 reset_view(struct view *view)
2656         int i;
2658         for (i = 0; i < view->lines; i++)
2659                 free(view->line[i].data);
2660         free(view->line);
2662         view->p_offset = view->offset;
2663         view->p_yoffset = view->yoffset;
2664         view->p_lineno = view->lineno;
2666         view->line = NULL;
2667         view->offset = 0;
2668         view->yoffset = 0;
2669         view->lines  = 0;
2670         view->lineno = 0;
2671         view->vid[0] = 0;
2672         view->update_secs = 0;
2675 static void
2676 free_argv(const char *argv[])
2678         int argc;
2680         for (argc = 0; argv[argc]; argc++)
2681                 free((void *) argv[argc]);
2684 static bool
2685 format_argv(const char *dst_argv[], const char *src_argv[], enum format_flags flags)
2687         char buf[SIZEOF_STR];
2688         int argc;
2689         bool noreplace = flags == FORMAT_NONE;
2691         free_argv(dst_argv);
2693         for (argc = 0; src_argv[argc]; argc++) {
2694                 const char *arg = src_argv[argc];
2695                 size_t bufpos = 0;
2697                 while (arg) {
2698                         char *next = strstr(arg, "%(");
2699                         int len = next - arg;
2700                         const char *value;
2702                         if (!next || noreplace) {
2703                                 if (flags == FORMAT_DASH && !strcmp(arg, "--"))
2704                                         noreplace = TRUE;
2705                                 len = strlen(arg);
2706                                 value = "";
2708                         } else if (!prefixcmp(next, "%(directory)")) {
2709                                 value = opt_path;
2711                         } else if (!prefixcmp(next, "%(file)")) {
2712                                 value = opt_file;
2714                         } else if (!prefixcmp(next, "%(ref)")) {
2715                                 value = *opt_ref ? opt_ref : "HEAD";
2717                         } else if (!prefixcmp(next, "%(head)")) {
2718                                 value = ref_head;
2720                         } else if (!prefixcmp(next, "%(commit)")) {
2721                                 value = ref_commit;
2723                         } else if (!prefixcmp(next, "%(blob)")) {
2724                                 value = ref_blob;
2726                         } else {
2727                                 report("Unknown replacement: `%s`", next);
2728                                 return FALSE;
2729                         }
2731                         if (!string_format_from(buf, &bufpos, "%.*s%s", len, arg, value))
2732                                 return FALSE;
2734                         arg = next && !noreplace ? strchr(next, ')') + 1 : NULL;
2735                 }
2737                 dst_argv[argc] = strdup(buf);
2738                 if (!dst_argv[argc])
2739                         break;
2740         }
2742         dst_argv[argc] = NULL;
2744         return src_argv[argc] == NULL;
2747 static bool
2748 restore_view_position(struct view *view)
2750         if (!view->p_restore || (view->pipe && view->lines <= view->p_lineno))
2751                 return FALSE;
2753         /* Changing the view position cancels the restoring. */
2754         /* FIXME: Changing back to the first line is not detected. */
2755         if (view->offset != 0 || view->lineno != 0) {
2756                 view->p_restore = FALSE;
2757                 return FALSE;
2758         }
2760         if (goto_view_line(view, view->p_offset, view->p_lineno) &&
2761             view_is_displayed(view))
2762                 werase(view->win);
2764         view->yoffset = view->p_yoffset;
2765         view->p_restore = FALSE;
2767         return TRUE;
2770 static void
2771 end_update(struct view *view, bool force)
2773         if (!view->pipe)
2774                 return;
2775         while (!view->ops->read(view, NULL))
2776                 if (!force)
2777                         return;
2778         set_nonblocking_input(FALSE);
2779         if (force)
2780                 kill_io(view->pipe);
2781         done_io(view->pipe);
2782         view->pipe = NULL;
2785 static void
2786 setup_update(struct view *view, const char *vid)
2788         set_nonblocking_input(TRUE);
2789         reset_view(view);
2790         string_copy_rev(view->vid, vid);
2791         view->pipe = &view->io;
2792         view->start_time = time(NULL);
2795 static bool
2796 prepare_update(struct view *view, const char *argv[], const char *dir,
2797                enum format_flags flags)
2799         if (view->pipe)
2800                 end_update(view, TRUE);
2801         return init_io_rd(&view->io, argv, dir, flags);
2804 static bool
2805 prepare_update_file(struct view *view, const char *name)
2807         if (view->pipe)
2808                 end_update(view, TRUE);
2809         return io_open(&view->io, name);
2812 static bool
2813 begin_update(struct view *view, bool refresh)
2815         if (view->pipe)
2816                 end_update(view, TRUE);
2818         if (refresh) {
2819                 if (!start_io(&view->io))
2820                         return FALSE;
2822         } else {
2823                 if (view == VIEW(REQ_VIEW_TREE) && strcmp(view->vid, view->id))
2824                         opt_path[0] = 0;
2826                 if (!run_io_rd(&view->io, view->ops->argv, FORMAT_ALL))
2827                         return FALSE;
2829                 /* Put the current ref_* value to the view title ref
2830                  * member. This is needed by the blob view. Most other
2831                  * views sets it automatically after loading because the
2832                  * first line is a commit line. */
2833                 string_copy_rev(view->ref, view->id);
2834         }
2836         setup_update(view, view->id);
2838         return TRUE;
2841 static bool
2842 update_view(struct view *view)
2844         char out_buffer[BUFSIZ * 2];
2845         char *line;
2846         /* Clear the view and redraw everything since the tree sorting
2847          * might have rearranged things. */
2848         bool redraw = view->lines == 0;
2849         bool can_read = TRUE;
2851         if (!view->pipe)
2852                 return TRUE;
2854         if (!io_can_read(view->pipe)) {
2855                 if (view->lines == 0 && view_is_displayed(view)) {
2856                         time_t secs = time(NULL) - view->start_time;
2858                         if (secs > 1 && secs > view->update_secs) {
2859                                 if (view->update_secs == 0)
2860                                         redraw_view(view);
2861                                 update_view_title(view);
2862                                 view->update_secs = secs;
2863                         }
2864                 }
2865                 return TRUE;
2866         }
2868         for (; (line = io_get(view->pipe, '\n', can_read)); can_read = FALSE) {
2869                 if (opt_iconv != ICONV_NONE) {
2870                         ICONV_CONST char *inbuf = line;
2871                         size_t inlen = strlen(line) + 1;
2873                         char *outbuf = out_buffer;
2874                         size_t outlen = sizeof(out_buffer);
2876                         size_t ret;
2878                         ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2879                         if (ret != (size_t) -1)
2880                                 line = out_buffer;
2881                 }
2883                 if (!view->ops->read(view, line)) {
2884                         report("Allocation failure");
2885                         end_update(view, TRUE);
2886                         return FALSE;
2887                 }
2888         }
2890         {
2891                 unsigned long lines = view->lines;
2892                 int digits;
2894                 for (digits = 0; lines; digits++)
2895                         lines /= 10;
2897                 /* Keep the displayed view in sync with line number scaling. */
2898                 if (digits != view->digits) {
2899                         view->digits = digits;
2900                         if (opt_line_number || view == VIEW(REQ_VIEW_BLAME))
2901                                 redraw = TRUE;
2902                 }
2903         }
2905         if (io_error(view->pipe)) {
2906                 report("Failed to read: %s", io_strerror(view->pipe));
2907                 end_update(view, TRUE);
2909         } else if (io_eof(view->pipe)) {
2910                 report("");
2911                 end_update(view, FALSE);
2912         }
2914         if (restore_view_position(view))
2915                 redraw = TRUE;
2917         if (!view_is_displayed(view))
2918                 return TRUE;
2920         if (redraw)
2921                 redraw_view_from(view, 0);
2922         else
2923                 redraw_view_dirty(view);
2925         /* Update the title _after_ the redraw so that if the redraw picks up a
2926          * commit reference in view->ref it'll be available here. */
2927         update_view_title(view);
2928         return TRUE;
2931 DEFINE_ALLOCATOR(realloc_lines, struct line, 256)
2933 static struct line *
2934 add_line_data(struct view *view, void *data, enum line_type type)
2936         struct line *line;
2938         if (!realloc_lines(&view->line, view->lines, 1))
2939                 return NULL;
2941         line = &view->line[view->lines++];
2942         memset(line, 0, sizeof(*line));
2943         line->type = type;
2944         line->data = data;
2945         line->dirty = 1;
2947         return line;
2950 static struct line *
2951 add_line_text(struct view *view, const char *text, enum line_type type)
2953         char *data = text ? strdup(text) : NULL;
2955         return data ? add_line_data(view, data, type) : NULL;
2958 static struct line *
2959 add_line_format(struct view *view, enum line_type type, const char *fmt, ...)
2961         char buf[SIZEOF_STR];
2962         va_list args;
2964         va_start(args, fmt);
2965         if (vsnprintf(buf, sizeof(buf), fmt, args) >= sizeof(buf))
2966                 buf[0] = 0;
2967         va_end(args);
2969         return buf[0] ? add_line_text(view, buf, type) : NULL;
2972 /*
2973  * View opening
2974  */
2976 enum open_flags {
2977         OPEN_DEFAULT = 0,       /* Use default view switching. */
2978         OPEN_SPLIT = 1,         /* Split current view. */
2979         OPEN_RELOAD = 4,        /* Reload view even if it is the current. */
2980         OPEN_REFRESH = 16,      /* Refresh view using previous command. */
2981         OPEN_PREPARED = 32,     /* Open already prepared command. */
2982 };
2984 static void
2985 open_view(struct view *prev, enum request request, enum open_flags flags)
2987         bool split = !!(flags & OPEN_SPLIT);
2988         bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH | OPEN_PREPARED));
2989         bool nomaximize = !!(flags & OPEN_REFRESH);
2990         struct view *view = VIEW(request);
2991         int nviews = displayed_views();
2992         struct view *base_view = display[0];
2994         if (view == prev && nviews == 1 && !reload) {
2995                 report("Already in %s view", view->name);
2996                 return;
2997         }
2999         if (view->git_dir && !opt_git_dir[0]) {
3000                 report("The %s view is disabled in pager view", view->name);
3001                 return;
3002         }
3004         if (split) {
3005                 display[1] = view;
3006                 current_view = 1;
3007         } else if (!nomaximize) {
3008                 /* Maximize the current view. */
3009                 memset(display, 0, sizeof(display));
3010                 current_view = 0;
3011                 display[current_view] = view;
3012         }
3014         /* Resize the view when switching between split- and full-screen,
3015          * or when switching between two different full-screen views. */
3016         if (nviews != displayed_views() ||
3017             (nviews == 1 && base_view != display[0]))
3018                 resize_display();
3020         if (view->ops->open) {
3021                 if (view->pipe)
3022                         end_update(view, TRUE);
3023                 if (!view->ops->open(view)) {
3024                         report("Failed to load %s view", view->name);
3025                         return;
3026                 }
3027                 restore_view_position(view);
3029         } else if ((reload || strcmp(view->vid, view->id)) &&
3030                    !begin_update(view, flags & (OPEN_REFRESH | OPEN_PREPARED))) {
3031                 report("Failed to load %s view", view->name);
3032                 return;
3033         }
3035         if (split && prev->lineno - prev->offset >= prev->height) {
3036                 /* Take the title line into account. */
3037                 int lines = prev->lineno - prev->offset - prev->height + 1;
3039                 /* Scroll the view that was split if the current line is
3040                  * outside the new limited view. */
3041                 do_scroll_view(prev, lines);
3042         }
3044         if (prev && view != prev) {
3045                 if (split) {
3046                         /* "Blur" the previous view. */
3047                         update_view_title(prev);
3048                 }
3050                 view->parent = prev;
3051         }
3053         if (view->pipe && view->lines == 0) {
3054                 /* Clear the old view and let the incremental updating refill
3055                  * the screen. */
3056                 werase(view->win);
3057                 view->p_restore = flags & (OPEN_RELOAD | OPEN_REFRESH);
3058                 report("");
3059         } else if (view_is_displayed(view)) {
3060                 redraw_view(view);
3061                 report("");
3062         }
3065 static void
3066 open_external_viewer(const char *argv[], const char *dir)
3068         def_prog_mode();           /* save current tty modes */
3069         endwin();                  /* restore original tty modes */
3070         run_io_fg(argv, dir);
3071         fprintf(stderr, "Press Enter to continue");
3072         getc(opt_tty);
3073         reset_prog_mode();
3074         redraw_display(TRUE);
3077 static void
3078 open_mergetool(const char *file)
3080         const char *mergetool_argv[] = { "git", "mergetool", file, NULL };
3082         open_external_viewer(mergetool_argv, opt_cdup);
3085 static void
3086 open_editor(bool from_root, const char *file)
3088         const char *editor_argv[] = { "vi", file, NULL };
3089         const char *editor;
3091         editor = getenv("GIT_EDITOR");
3092         if (!editor && *opt_editor)
3093                 editor = opt_editor;
3094         if (!editor)
3095                 editor = getenv("VISUAL");
3096         if (!editor)
3097                 editor = getenv("EDITOR");
3098         if (!editor)
3099                 editor = "vi";
3101         editor_argv[0] = editor;
3102         open_external_viewer(editor_argv, from_root ? opt_cdup : NULL);
3105 static void
3106 open_run_request(enum request request)
3108         struct run_request *req = get_run_request(request);
3109         const char *argv[ARRAY_SIZE(req->argv)] = { NULL };
3111         if (!req) {
3112                 report("Unknown run request");
3113                 return;
3114         }
3116         if (format_argv(argv, req->argv, FORMAT_ALL))
3117                 open_external_viewer(argv, NULL);
3118         free_argv(argv);
3121 /*
3122  * User request switch noodle
3123  */
3125 static int
3126 view_driver(struct view *view, enum request request)
3128         int i;
3130         if (request == REQ_NONE)
3131                 return TRUE;
3133         if (request > REQ_NONE) {
3134                 open_run_request(request);
3135                 /* FIXME: When all views can refresh always do this. */
3136                 if (view == VIEW(REQ_VIEW_STATUS) ||
3137                     view == VIEW(REQ_VIEW_MAIN) ||
3138                     view == VIEW(REQ_VIEW_LOG) ||
3139                     view == VIEW(REQ_VIEW_BRANCH) ||
3140                     view == VIEW(REQ_VIEW_STAGE))
3141                         request = REQ_REFRESH;
3142                 else
3143                         return TRUE;
3144         }
3146         if (view && view->lines) {
3147                 request = view->ops->request(view, request, &view->line[view->lineno]);
3148                 if (request == REQ_NONE)
3149                         return TRUE;
3150         }
3152         switch (request) {
3153         case REQ_MOVE_UP:
3154         case REQ_MOVE_DOWN:
3155         case REQ_MOVE_PAGE_UP:
3156         case REQ_MOVE_PAGE_DOWN:
3157         case REQ_MOVE_FIRST_LINE:
3158         case REQ_MOVE_LAST_LINE:
3159                 move_view(view, request);
3160                 break;
3162         case REQ_SCROLL_LEFT:
3163         case REQ_SCROLL_RIGHT:
3164         case REQ_SCROLL_LINE_DOWN:
3165         case REQ_SCROLL_LINE_UP:
3166         case REQ_SCROLL_PAGE_DOWN:
3167         case REQ_SCROLL_PAGE_UP:
3168                 scroll_view(view, request);
3169                 break;
3171         case REQ_VIEW_BLAME:
3172                 if (!opt_file[0]) {
3173                         report("No file chosen, press %s to open tree view",
3174                                get_key(REQ_VIEW_TREE));
3175                         break;
3176                 }
3177                 open_view(view, request, OPEN_DEFAULT);
3178                 break;
3180         case REQ_VIEW_BLOB:
3181                 if (!ref_blob[0]) {
3182                         report("No file chosen, press %s to open tree view",
3183                                get_key(REQ_VIEW_TREE));
3184                         break;
3185                 }
3186                 open_view(view, request, OPEN_DEFAULT);
3187                 break;
3189         case REQ_VIEW_PAGER:
3190                 if (!VIEW(REQ_VIEW_PAGER)->pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
3191                         report("No pager content, press %s to run command from prompt",
3192                                get_key(REQ_PROMPT));
3193                         break;
3194                 }
3195                 open_view(view, request, OPEN_DEFAULT);
3196                 break;
3198         case REQ_VIEW_STAGE:
3199                 if (!VIEW(REQ_VIEW_STAGE)->lines) {
3200                         report("No stage content, press %s to open the status view and choose file",
3201                                get_key(REQ_VIEW_STATUS));
3202                         break;
3203                 }
3204                 open_view(view, request, OPEN_DEFAULT);
3205                 break;
3207         case REQ_VIEW_STATUS:
3208                 if (opt_is_inside_work_tree == FALSE) {
3209                         report("The status view requires a working tree");
3210                         break;
3211                 }
3212                 open_view(view, request, OPEN_DEFAULT);
3213                 break;
3215         case REQ_VIEW_MAIN:
3216         case REQ_VIEW_DIFF:
3217         case REQ_VIEW_LOG:
3218         case REQ_VIEW_TREE:
3219         case REQ_VIEW_HELP:
3220         case REQ_VIEW_BRANCH:
3221                 open_view(view, request, OPEN_DEFAULT);
3222                 break;
3224         case REQ_NEXT:
3225         case REQ_PREVIOUS:
3226                 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
3228                 if ((view == VIEW(REQ_VIEW_DIFF) &&
3229                      view->parent == VIEW(REQ_VIEW_MAIN)) ||
3230                    (view == VIEW(REQ_VIEW_DIFF) &&
3231                      view->parent == VIEW(REQ_VIEW_BLAME)) ||
3232                    (view == VIEW(REQ_VIEW_STAGE) &&
3233                      view->parent == VIEW(REQ_VIEW_STATUS)) ||
3234                    (view == VIEW(REQ_VIEW_BLOB) &&
3235                      view->parent == VIEW(REQ_VIEW_TREE)) ||
3236                    (view == VIEW(REQ_VIEW_MAIN) &&
3237                      view->parent == VIEW(REQ_VIEW_BRANCH))) {
3238                         int line;
3240                         view = view->parent;
3241                         line = view->lineno;
3242                         move_view(view, request);
3243                         if (view_is_displayed(view))
3244                                 update_view_title(view);
3245                         if (line != view->lineno)
3246                                 view->ops->request(view, REQ_ENTER,
3247                                                    &view->line[view->lineno]);
3249                 } else {
3250                         move_view(view, request);
3251                 }
3252                 break;
3254         case REQ_VIEW_NEXT:
3255         {
3256                 int nviews = displayed_views();
3257                 int next_view = (current_view + 1) % nviews;
3259                 if (next_view == current_view) {
3260                         report("Only one view is displayed");
3261                         break;
3262                 }
3264                 current_view = next_view;
3265                 /* Blur out the title of the previous view. */
3266                 update_view_title(view);
3267                 report("");
3268                 break;
3269         }
3270         case REQ_REFRESH:
3271                 report("Refreshing is not yet supported for the %s view", view->name);
3272                 break;
3274         case REQ_MAXIMIZE:
3275                 if (displayed_views() == 2)
3276                         maximize_view(view);
3277                 break;
3279         case REQ_TOGGLE_LINENO:
3280                 toggle_view_option(&opt_line_number, "line numbers");
3281                 break;
3283         case REQ_TOGGLE_DATE:
3284                 toggle_view_option(&opt_date, "date display");
3285                 break;
3287         case REQ_TOGGLE_AUTHOR:
3288                 toggle_view_option(&opt_author, "author display");
3289                 break;
3291         case REQ_TOGGLE_REV_GRAPH:
3292                 toggle_view_option(&opt_rev_graph, "revision graph display");
3293                 break;
3295         case REQ_TOGGLE_REFS:
3296                 toggle_view_option(&opt_show_refs, "reference display");
3297                 break;
3299         case REQ_TOGGLE_SORT_FIELD:
3300         case REQ_TOGGLE_SORT_ORDER:
3301                 report("Sorting is not yet supported for the %s view", view->name);
3302                 break;
3304         case REQ_SEARCH:
3305         case REQ_SEARCH_BACK:
3306                 search_view(view, request);
3307                 break;
3309         case REQ_FIND_NEXT:
3310         case REQ_FIND_PREV:
3311                 find_next(view, request);
3312                 break;
3314         case REQ_STOP_LOADING:
3315                 for (i = 0; i < ARRAY_SIZE(views); i++) {
3316                         view = &views[i];
3317                         if (view->pipe)
3318                                 report("Stopped loading the %s view", view->name),
3319                         end_update(view, TRUE);
3320                 }
3321                 break;
3323         case REQ_SHOW_VERSION:
3324                 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
3325                 return TRUE;
3327         case REQ_SCREEN_REDRAW:
3328                 redraw_display(TRUE);
3329                 break;
3331         case REQ_EDIT:
3332                 report("Nothing to edit");
3333                 break;
3335         case REQ_ENTER:
3336                 report("Nothing to enter");
3337                 break;
3339         case REQ_VIEW_CLOSE:
3340                 /* XXX: Mark closed views by letting view->parent point to the
3341                  * view itself. Parents to closed view should never be
3342                  * followed. */
3343                 if (view->parent &&
3344                     view->parent->parent != view->parent) {
3345                         maximize_view(view->parent);
3346                         view->parent = view;
3347                         break;
3348                 }
3349                 /* Fall-through */
3350         case REQ_QUIT:
3351                 return FALSE;
3353         default:
3354                 report("Unknown key, press 'h' for help");
3355                 return TRUE;
3356         }
3358         return TRUE;
3362 /*
3363  * View backend utilities
3364  */
3366 enum sort_field {
3367         ORDERBY_NAME,
3368         ORDERBY_DATE,
3369         ORDERBY_AUTHOR,
3370 };
3372 struct sort_state {
3373         const enum sort_field *fields;
3374         size_t size, current;
3375         bool reverse;
3376 };
3378 #define SORT_STATE(fields) { fields, ARRAY_SIZE(fields), 0 }
3379 #define get_sort_field(state) ((state).fields[(state).current])
3380 #define sort_order(state, result) ((state).reverse ? -(result) : (result))
3382 static void
3383 sort_view(struct view *view, enum request request, struct sort_state *state,
3384           int (*compare)(const void *, const void *))
3386         switch (request) {
3387         case REQ_TOGGLE_SORT_FIELD:
3388                 state->current = (state->current + 1) % state->size;
3389                 break;
3391         case REQ_TOGGLE_SORT_ORDER:
3392                 state->reverse = !state->reverse;
3393                 break;
3394         default:
3395                 die("Not a sort request");
3396         }
3398         qsort(view->line, view->lines, sizeof(*view->line), compare);
3399         redraw_view(view);
3402 DEFINE_ALLOCATOR(realloc_authors, const char *, 256)
3404 /* Small author cache to reduce memory consumption. It uses binary
3405  * search to lookup or find place to position new entries. No entries
3406  * are ever freed. */
3407 static const char *
3408 get_author(const char *name)
3410         static const char **authors;
3411         static size_t authors_size;
3412         int from = 0, to = authors_size - 1;
3414         while (from <= to) {
3415                 size_t pos = (to + from) / 2;
3416                 int cmp = strcmp(name, authors[pos]);
3418                 if (!cmp)
3419                         return authors[pos];
3421                 if (cmp < 0)
3422                         to = pos - 1;
3423                 else
3424                         from = pos + 1;
3425         }
3427         if (!realloc_authors(&authors, authors_size, 1))
3428                 return NULL;
3429         name = strdup(name);
3430         if (!name)
3431                 return NULL;
3433         memmove(authors + from + 1, authors + from, (authors_size - from) * sizeof(*authors));
3434         authors[from] = name;
3435         authors_size++;
3437         return name;
3440 static void
3441 parse_timezone(time_t *time, const char *zone)
3443         long tz;
3445         tz  = ('0' - zone[1]) * 60 * 60 * 10;
3446         tz += ('0' - zone[2]) * 60 * 60;
3447         tz += ('0' - zone[3]) * 60;
3448         tz += ('0' - zone[4]);
3450         if (zone[0] == '-')
3451                 tz = -tz;
3453         *time -= tz;
3456 /* Parse author lines where the name may be empty:
3457  *      author  <email@address.tld> 1138474660 +0100
3458  */
3459 static void
3460 parse_author_line(char *ident, const char **author, time_t *time)
3462         char *nameend = strchr(ident, '<');
3463         char *emailend = strchr(ident, '>');
3465         if (nameend && emailend)
3466                 *nameend = *emailend = 0;
3467         ident = chomp_string(ident);
3468         if (!*ident) {
3469                 if (nameend)
3470                         ident = chomp_string(nameend + 1);
3471                 if (!*ident)
3472                         ident = "Unknown";
3473         }
3475         *author = get_author(ident);
3477         /* Parse epoch and timezone */
3478         if (emailend && emailend[1] == ' ') {
3479                 char *secs = emailend + 2;
3480                 char *zone = strchr(secs, ' ');
3482                 *time = (time_t) atol(secs);
3484                 if (zone && strlen(zone) == STRING_SIZE(" +0700"))
3485                         parse_timezone(time, zone + 1);
3486         }
3489 static enum input_status
3490 select_commit_parent_handler(void *data, char *buf, int c)
3492         size_t parents = *(size_t *) data;
3493         int parent = 0;
3495         if (!isdigit(c))
3496                 return INPUT_SKIP;
3498         if (*buf)
3499                 parent = atoi(buf) * 10;
3500         parent += c - '0';
3502         if (parent > parents)
3503                 return INPUT_SKIP;
3504         return INPUT_OK;
3507 static bool
3508 select_commit_parent(const char *id, char rev[SIZEOF_REV], const char *path)
3510         char buf[SIZEOF_STR * 4];
3511         const char *revlist_argv[] = {
3512                 "git", "rev-list", "-1", "--parents", id, "--", path, NULL
3513         };
3514         int parents;
3516         if (!run_io_buf(revlist_argv, buf, sizeof(buf)) ||
3517             (parents = (strlen(buf) / 40) - 1) < 0) {
3518                 report("Failed to get parent information");
3519                 return FALSE;
3521         } else if (parents == 0) {
3522                 if (path)
3523                         report("Path '%s' does not exist in the parent", path);
3524                 else
3525                         report("The selected commit has no parents");
3526                 return FALSE;
3527         }
3529         if (parents > 1) {
3530                 char prompt[SIZEOF_STR];
3531                 char *result;
3533                 if (!string_format(prompt, "Which parent? [1..%d] ", parents))
3534                         return FALSE;
3535                 result = prompt_input(prompt, select_commit_parent_handler, &parents);
3536                 if (!result)
3537                         return FALSE;
3538                 parents = atoi(result);
3539         }
3541         string_copy_rev(rev, &buf[41 * parents]);
3542         return TRUE;
3545 /*
3546  * Pager backend
3547  */
3549 static bool
3550 pager_draw(struct view *view, struct line *line, unsigned int lineno)
3552         char text[SIZEOF_STR];
3554         if (opt_line_number && draw_lineno(view, lineno))
3555                 return TRUE;
3557         string_expand(text, sizeof(text), line->data, opt_tab_size);
3558         draw_text(view, line->type, text, TRUE);
3559         return TRUE;
3562 static bool
3563 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
3565         const char *describe_argv[] = { "git", "describe", commit_id, NULL };
3566         char ref[SIZEOF_STR];
3568         if (!run_io_buf(describe_argv, ref, sizeof(ref)) || !*ref)
3569                 return TRUE;
3571         /* This is the only fatal call, since it can "corrupt" the buffer. */
3572         if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
3573                 return FALSE;
3575         return TRUE;
3578 static void
3579 add_pager_refs(struct view *view, struct line *line)
3581         char buf[SIZEOF_STR];
3582         char *commit_id = (char *)line->data + STRING_SIZE("commit ");
3583         struct ref_list *list;
3584         size_t bufpos = 0, i;
3585         const char *sep = "Refs: ";
3586         bool is_tag = FALSE;
3588         assert(line->type == LINE_COMMIT);
3590         list = get_ref_list(commit_id);
3591         if (!list) {
3592                 if (view == VIEW(REQ_VIEW_DIFF))
3593                         goto try_add_describe_ref;
3594                 return;
3595         }
3597         for (i = 0; i < list->size; i++) {
3598                 struct ref *ref = list->refs[i];
3599                 const char *fmt = ref->tag    ? "%s[%s]" :
3600                                   ref->remote ? "%s<%s>" : "%s%s";
3602                 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
3603                         return;
3604                 sep = ", ";
3605                 if (ref->tag)
3606                         is_tag = TRUE;
3607         }
3609         if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
3610 try_add_describe_ref:
3611                 /* Add <tag>-g<commit_id> "fake" reference. */
3612                 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3613                         return;
3614         }
3616         if (bufpos == 0)
3617                 return;
3619         add_line_text(view, buf, LINE_PP_REFS);
3622 static bool
3623 pager_read(struct view *view, char *data)
3625         struct line *line;
3627         if (!data)
3628                 return TRUE;
3630         line = add_line_text(view, data, get_line_type(data));
3631         if (!line)
3632                 return FALSE;
3634         if (line->type == LINE_COMMIT &&
3635             (view == VIEW(REQ_VIEW_DIFF) ||
3636              view == VIEW(REQ_VIEW_LOG)))
3637                 add_pager_refs(view, line);
3639         return TRUE;
3642 static enum request
3643 pager_request(struct view *view, enum request request, struct line *line)
3645         int split = 0;
3647         if (request != REQ_ENTER)
3648                 return request;
3650         if (line->type == LINE_COMMIT &&
3651            (view == VIEW(REQ_VIEW_LOG) ||
3652             view == VIEW(REQ_VIEW_PAGER))) {
3653                 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3654                 split = 1;
3655         }
3657         /* Always scroll the view even if it was split. That way
3658          * you can use Enter to scroll through the log view and
3659          * split open each commit diff. */
3660         scroll_view(view, REQ_SCROLL_LINE_DOWN);
3662         /* FIXME: A minor workaround. Scrolling the view will call report("")
3663          * but if we are scrolling a non-current view this won't properly
3664          * update the view title. */
3665         if (split)
3666                 update_view_title(view);
3668         return REQ_NONE;
3671 static bool
3672 pager_grep(struct view *view, struct line *line)
3674         const char *text[] = { line->data, NULL };
3676         return grep_text(view, text);
3679 static void
3680 pager_select(struct view *view, struct line *line)
3682         if (line->type == LINE_COMMIT) {
3683                 char *text = (char *)line->data + STRING_SIZE("commit ");
3685                 if (view != VIEW(REQ_VIEW_PAGER))
3686                         string_copy_rev(view->ref, text);
3687                 string_copy_rev(ref_commit, text);
3688         }
3691 static struct view_ops pager_ops = {
3692         "line",
3693         NULL,
3694         NULL,
3695         pager_read,
3696         pager_draw,
3697         pager_request,
3698         pager_grep,
3699         pager_select,
3700 };
3702 static const char *log_argv[SIZEOF_ARG] = {
3703         "git", "log", "--no-color", "--cc", "--stat", "-n100", "%(head)", NULL
3704 };
3706 static enum request
3707 log_request(struct view *view, enum request request, struct line *line)
3709         switch (request) {
3710         case REQ_REFRESH:
3711                 load_refs();
3712                 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3713                 return REQ_NONE;
3714         default:
3715                 return pager_request(view, request, line);
3716         }
3719 static struct view_ops log_ops = {
3720         "line",
3721         log_argv,
3722         NULL,
3723         pager_read,
3724         pager_draw,
3725         log_request,
3726         pager_grep,
3727         pager_select,
3728 };
3730 static const char *diff_argv[SIZEOF_ARG] = {
3731         "git", "show", "--pretty=fuller", "--no-color", "--root",
3732                 "--patch-with-stat", "--find-copies-harder", "-C", "%(commit)", NULL
3733 };
3735 static struct view_ops diff_ops = {
3736         "line",
3737         diff_argv,
3738         NULL,
3739         pager_read,
3740         pager_draw,
3741         pager_request,
3742         pager_grep,
3743         pager_select,
3744 };
3746 /*
3747  * Help backend
3748  */
3750 static bool
3751 help_open(struct view *view)
3753         char buf[SIZEOF_STR];
3754         size_t bufpos;
3755         int i;
3757         if (view->lines > 0)
3758                 return TRUE;
3760         add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3762         for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3763                 const char *key;
3765                 if (req_info[i].request == REQ_NONE)
3766                         continue;
3768                 if (!req_info[i].request) {
3769                         add_line_text(view, "", LINE_DEFAULT);
3770                         add_line_text(view, req_info[i].help, LINE_DEFAULT);
3771                         continue;
3772                 }
3774                 key = get_key(req_info[i].request);
3775                 if (!*key)
3776                         key = "(no key defined)";
3778                 for (bufpos = 0; bufpos <= req_info[i].namelen; bufpos++) {
3779                         buf[bufpos] = tolower(req_info[i].name[bufpos]);
3780                         if (buf[bufpos] == '_')
3781                                 buf[bufpos] = '-';
3782                 }
3784                 add_line_format(view, LINE_DEFAULT, "    %-25s %-20s %s",
3785                                 key, buf, req_info[i].help);
3786         }
3788         if (run_requests) {
3789                 add_line_text(view, "", LINE_DEFAULT);
3790                 add_line_text(view, "External commands:", LINE_DEFAULT);
3791         }
3793         for (i = 0; i < run_requests; i++) {
3794                 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3795                 const char *key;
3796                 int argc;
3798                 if (!req)
3799                         continue;
3801                 key = get_key_name(req->key);
3802                 if (!*key)
3803                         key = "(no key defined)";
3805                 for (bufpos = 0, argc = 0; req->argv[argc]; argc++)
3806                         if (!string_format_from(buf, &bufpos, "%s%s",
3807                                                 argc ? " " : "", req->argv[argc]))
3808                                 return REQ_NONE;
3810                 add_line_format(view, LINE_DEFAULT, "    %-10s %-14s `%s`",
3811                                 keymap_table[req->keymap].name, key, buf);
3812         }
3814         return TRUE;
3817 static struct view_ops help_ops = {
3818         "line",
3819         NULL,
3820         help_open,
3821         NULL,
3822         pager_draw,
3823         pager_request,
3824         pager_grep,
3825         pager_select,
3826 };
3829 /*
3830  * Tree backend
3831  */
3833 struct tree_stack_entry {
3834         struct tree_stack_entry *prev;  /* Entry below this in the stack */
3835         unsigned long lineno;           /* Line number to restore */
3836         char *name;                     /* Position of name in opt_path */
3837 };
3839 /* The top of the path stack. */
3840 static struct tree_stack_entry *tree_stack = NULL;
3841 unsigned long tree_lineno = 0;
3843 static void
3844 pop_tree_stack_entry(void)
3846         struct tree_stack_entry *entry = tree_stack;
3848         tree_lineno = entry->lineno;
3849         entry->name[0] = 0;
3850         tree_stack = entry->prev;
3851         free(entry);
3854 static void
3855 push_tree_stack_entry(const char *name, unsigned long lineno)
3857         struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3858         size_t pathlen = strlen(opt_path);
3860         if (!entry)
3861                 return;
3863         entry->prev = tree_stack;
3864         entry->name = opt_path + pathlen;
3865         tree_stack = entry;
3867         if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3868                 pop_tree_stack_entry();
3869                 return;
3870         }
3872         /* Move the current line to the first tree entry. */
3873         tree_lineno = 1;
3874         entry->lineno = lineno;
3877 /* Parse output from git-ls-tree(1):
3878  *
3879  * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3880  */
3882 #define SIZEOF_TREE_ATTR \
3883         STRING_SIZE("100644 blob f931e1d229c3e185caad4449bf5b66ed72462657\t")
3885 #define SIZEOF_TREE_MODE \
3886         STRING_SIZE("100644 ")
3888 #define TREE_ID_OFFSET \
3889         STRING_SIZE("100644 blob ")
3891 struct tree_entry {
3892         char id[SIZEOF_REV];
3893         mode_t mode;
3894         time_t time;                    /* Date from the author ident. */
3895         const char *author;             /* Author of the commit. */
3896         char name[1];
3897 };
3899 static const char *
3900 tree_path(const struct line *line)
3902         return ((struct tree_entry *) line->data)->name;
3905 static int
3906 tree_compare_entry(const struct line *line1, const struct line *line2)
3908         if (line1->type != line2->type)
3909                 return line1->type == LINE_TREE_DIR ? -1 : 1;
3910         return strcmp(tree_path(line1), tree_path(line2));
3913 static const enum sort_field tree_sort_fields[] = {
3914         ORDERBY_NAME, ORDERBY_DATE, ORDERBY_AUTHOR
3915 };
3916 static struct sort_state tree_sort_state = SORT_STATE(tree_sort_fields);
3918 static int
3919 tree_compare(const void *l1, const void *l2)
3921         const struct line *line1 = (const struct line *) l1;
3922         const struct line *line2 = (const struct line *) l2;
3923         const struct tree_entry *entry1 = ((const struct line *) l1)->data;
3924         const struct tree_entry *entry2 = ((const struct line *) l2)->data;
3926         if (line1->type == LINE_TREE_HEAD)
3927                 return -1;
3928         if (line2->type == LINE_TREE_HEAD)
3929                 return 1;
3931         switch (get_sort_field(tree_sort_state)) {
3932         case ORDERBY_DATE:
3933                 return sort_order(tree_sort_state, entry1->time - entry2->time);
3935         case ORDERBY_AUTHOR:
3936                 return sort_order(tree_sort_state, strcmp(entry1->author, entry2->author));
3938         case ORDERBY_NAME:
3939         default:
3940                 return sort_order(tree_sort_state, tree_compare_entry(line1, line2));
3941         }
3945 static struct line *
3946 tree_entry(struct view *view, enum line_type type, const char *path,
3947            const char *mode, const char *id)
3949         struct tree_entry *entry = calloc(1, sizeof(*entry) + strlen(path));
3950         struct line *line = entry ? add_line_data(view, entry, type) : NULL;
3952         if (!entry || !line) {
3953                 free(entry);
3954                 return NULL;
3955         }
3957         strncpy(entry->name, path, strlen(path));
3958         if (mode)
3959                 entry->mode = strtoul(mode, NULL, 8);
3960         if (id)
3961                 string_copy_rev(entry->id, id);
3963         return line;
3966 static bool
3967 tree_read_date(struct view *view, char *text, bool *read_date)
3969         static const char *author_name;
3970         static time_t author_time;
3972         if (!text && *read_date) {
3973                 *read_date = FALSE;
3974                 return TRUE;
3976         } else if (!text) {
3977                 char *path = *opt_path ? opt_path : ".";
3978                 /* Find next entry to process */
3979                 const char *log_file[] = {
3980                         "git", "log", "--no-color", "--pretty=raw",
3981                                 "--cc", "--raw", view->id, "--", path, NULL
3982                 };
3983                 struct io io = {};
3985                 if (!view->lines) {
3986                         tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL);
3987                         report("Tree is empty");
3988                         return TRUE;
3989                 }
3991                 if (!run_io_rd(&io, log_file, FORMAT_NONE)) {
3992                         report("Failed to load tree data");
3993                         return TRUE;
3994                 }
3996                 done_io(view->pipe);
3997                 view->io = io;
3998                 *read_date = TRUE;
3999                 return FALSE;
4001         } else if (*text == 'a' && get_line_type(text) == LINE_AUTHOR) {
4002                 parse_author_line(text + STRING_SIZE("author "),
4003                                   &author_name, &author_time);
4005         } else if (*text == ':') {
4006                 char *pos;
4007                 size_t annotated = 1;
4008                 size_t i;
4010                 pos = strchr(text, '\t');
4011                 if (!pos)
4012                         return TRUE;
4013                 text = pos + 1;
4014                 if (*opt_prefix && !strncmp(text, opt_prefix, strlen(opt_prefix)))
4015                         text += strlen(opt_prefix);
4016                 if (*opt_path && !strncmp(text, opt_path, strlen(opt_path)))
4017                         text += strlen(opt_path);
4018                 pos = strchr(text, '/');
4019                 if (pos)
4020                         *pos = 0;
4022                 for (i = 1; i < view->lines; i++) {
4023                         struct line *line = &view->line[i];
4024                         struct tree_entry *entry = line->data;
4026                         annotated += !!entry->author;
4027                         if (entry->author || strcmp(entry->name, text))
4028                                 continue;
4030                         entry->author = author_name;
4031                         entry->time = author_time;
4032                         line->dirty = 1;
4033                         break;
4034                 }
4036                 if (annotated == view->lines)
4037                         kill_io(view->pipe);
4038         }
4039         return TRUE;
4042 static bool
4043 tree_read(struct view *view, char *text)
4045         static bool read_date = FALSE;
4046         struct tree_entry *data;
4047         struct line *entry, *line;
4048         enum line_type type;
4049         size_t textlen = text ? strlen(text) : 0;
4050         char *path = text + SIZEOF_TREE_ATTR;
4052         if (read_date || !text)
4053                 return tree_read_date(view, text, &read_date);
4055         if (textlen <= SIZEOF_TREE_ATTR)
4056                 return FALSE;
4057         if (view->lines == 0 &&
4058             !tree_entry(view, LINE_TREE_HEAD, opt_path, NULL, NULL))
4059                 return FALSE;
4061         /* Strip the path part ... */
4062         if (*opt_path) {
4063                 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
4064                 size_t striplen = strlen(opt_path);
4066                 if (pathlen > striplen)
4067                         memmove(path, path + striplen,
4068                                 pathlen - striplen + 1);
4070                 /* Insert "link" to parent directory. */
4071                 if (view->lines == 1 &&
4072                     !tree_entry(view, LINE_TREE_DIR, "..", "040000", view->ref))
4073                         return FALSE;
4074         }
4076         type = text[SIZEOF_TREE_MODE] == 't' ? LINE_TREE_DIR : LINE_TREE_FILE;
4077         entry = tree_entry(view, type, path, text, text + TREE_ID_OFFSET);
4078         if (!entry)
4079                 return FALSE;
4080         data = entry->data;
4082         /* Skip "Directory ..." and ".." line. */
4083         for (line = &view->line[1 + !!*opt_path]; line < entry; line++) {
4084                 if (tree_compare_entry(line, entry) <= 0)
4085                         continue;
4087                 memmove(line + 1, line, (entry - line) * sizeof(*entry));
4089                 line->data = data;
4090                 line->type = type;
4091                 for (; line <= entry; line++)
4092                         line->dirty = line->cleareol = 1;
4093                 return TRUE;
4094         }
4096         if (tree_lineno > view->lineno) {
4097                 view->lineno = tree_lineno;
4098                 tree_lineno = 0;
4099         }
4101         return TRUE;
4104 static bool
4105 tree_draw(struct view *view, struct line *line, unsigned int lineno)
4107         struct tree_entry *entry = line->data;
4109         if (line->type == LINE_TREE_HEAD) {
4110                 if (draw_text(view, line->type, "Directory path /", TRUE))
4111                         return TRUE;
4112         } else {
4113                 if (draw_mode(view, entry->mode))
4114                         return TRUE;
4116                 if (opt_author && draw_author(view, entry->author))
4117                         return TRUE;
4119                 if (opt_date && draw_date(view, entry->author ? &entry->time : NULL))
4120                         return TRUE;
4121         }
4122         if (draw_text(view, line->type, entry->name, TRUE))
4123                 return TRUE;
4124         return TRUE;
4127 static void
4128 open_blob_editor()
4130         char file[SIZEOF_STR] = "/tmp/tigblob.XXXXXX";
4131         int fd = mkstemp(file);
4133         if (fd == -1)
4134                 report("Failed to create temporary file");
4135         else if (!run_io_append(blob_ops.argv, FORMAT_ALL, fd))
4136                 report("Failed to save blob data to file");
4137         else
4138                 open_editor(FALSE, file);
4139         if (fd != -1)
4140                 unlink(file);
4143 static enum request
4144 tree_request(struct view *view, enum request request, struct line *line)
4146         enum open_flags flags;
4148         switch (request) {
4149         case REQ_VIEW_BLAME:
4150                 if (line->type != LINE_TREE_FILE) {
4151                         report("Blame only supported for files");
4152                         return REQ_NONE;
4153                 }
4155                 string_copy(opt_ref, view->vid);
4156                 return request;
4158         case REQ_EDIT:
4159                 if (line->type != LINE_TREE_FILE) {
4160                         report("Edit only supported for files");
4161                 } else if (!is_head_commit(view->vid)) {
4162                         open_blob_editor();
4163                 } else {
4164                         open_editor(TRUE, opt_file);
4165                 }
4166                 return REQ_NONE;
4168         case REQ_TOGGLE_SORT_FIELD:
4169         case REQ_TOGGLE_SORT_ORDER:
4170                 sort_view(view, request, &tree_sort_state, tree_compare);
4171                 return REQ_NONE;
4173         case REQ_PARENT:
4174                 if (!*opt_path) {
4175                         /* quit view if at top of tree */
4176                         return REQ_VIEW_CLOSE;
4177                 }
4178                 /* fake 'cd  ..' */
4179                 line = &view->line[1];
4180                 break;
4182         case REQ_ENTER:
4183                 break;
4185         default:
4186                 return request;
4187         }
4189         /* Cleanup the stack if the tree view is at a different tree. */
4190         while (!*opt_path && tree_stack)
4191                 pop_tree_stack_entry();
4193         switch (line->type) {
4194         case LINE_TREE_DIR:
4195                 /* Depending on whether it is a subdirectory or parent link
4196                  * mangle the path buffer. */
4197                 if (line == &view->line[1] && *opt_path) {
4198                         pop_tree_stack_entry();
4200                 } else {
4201                         const char *basename = tree_path(line);
4203                         push_tree_stack_entry(basename, view->lineno);
4204                 }
4206                 /* Trees and subtrees share the same ID, so they are not not
4207                  * unique like blobs. */
4208                 flags = OPEN_RELOAD;
4209                 request = REQ_VIEW_TREE;
4210                 break;
4212         case LINE_TREE_FILE:
4213                 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4214                 request = REQ_VIEW_BLOB;
4215                 break;
4217         default:
4218                 return REQ_NONE;
4219         }
4221         open_view(view, request, flags);
4222         if (request == REQ_VIEW_TREE)
4223                 view->lineno = tree_lineno;
4225         return REQ_NONE;
4228 static bool
4229 tree_grep(struct view *view, struct line *line)
4231         struct tree_entry *entry = line->data;
4232         const char *text[] = {
4233                 entry->name,
4234                 opt_author ? entry->author : "",
4235                 opt_date ? mkdate(&entry->time) : "",
4236                 NULL
4237         };
4239         return grep_text(view, text);
4242 static void
4243 tree_select(struct view *view, struct line *line)
4245         struct tree_entry *entry = line->data;
4247         if (line->type == LINE_TREE_FILE) {
4248                 string_copy_rev(ref_blob, entry->id);
4249                 string_format(opt_file, "%s%s", opt_path, tree_path(line));
4251         } else if (line->type != LINE_TREE_DIR) {
4252                 return;
4253         }
4255         string_copy_rev(view->ref, entry->id);
4258 static const char *tree_argv[SIZEOF_ARG] = {
4259         "git", "ls-tree", "%(commit)", "%(directory)", NULL
4260 };
4262 static struct view_ops tree_ops = {
4263         "file",
4264         tree_argv,
4265         NULL,
4266         tree_read,
4267         tree_draw,
4268         tree_request,
4269         tree_grep,
4270         tree_select,
4271 };
4273 static bool
4274 blob_read(struct view *view, char *line)
4276         if (!line)
4277                 return TRUE;
4278         return add_line_text(view, line, LINE_DEFAULT) != NULL;
4281 static enum request
4282 blob_request(struct view *view, enum request request, struct line *line)
4284         switch (request) {
4285         case REQ_EDIT:
4286                 open_blob_editor();
4287                 return REQ_NONE;
4288         default:
4289                 return pager_request(view, request, line);
4290         }
4293 static const char *blob_argv[SIZEOF_ARG] = {
4294         "git", "cat-file", "blob", "%(blob)", NULL
4295 };
4297 static struct view_ops blob_ops = {
4298         "line",
4299         blob_argv,
4300         NULL,
4301         blob_read,
4302         pager_draw,
4303         blob_request,
4304         pager_grep,
4305         pager_select,
4306 };
4308 /*
4309  * Blame backend
4310  *
4311  * Loading the blame view is a two phase job:
4312  *
4313  *  1. File content is read either using opt_file from the
4314  *     filesystem or using git-cat-file.
4315  *  2. Then blame information is incrementally added by
4316  *     reading output from git-blame.
4317  */
4319 static const char *blame_head_argv[] = {
4320         "git", "blame", "--incremental", "--", "%(file)", NULL
4321 };
4323 static const char *blame_ref_argv[] = {
4324         "git", "blame", "--incremental", "%(ref)", "--", "%(file)", NULL
4325 };
4327 static const char *blame_cat_file_argv[] = {
4328         "git", "cat-file", "blob", "%(ref):%(file)", NULL
4329 };
4331 struct blame_commit {
4332         char id[SIZEOF_REV];            /* SHA1 ID. */
4333         char title[128];                /* First line of the commit message. */
4334         const char *author;             /* Author of the commit. */
4335         time_t time;                    /* Date from the author ident. */
4336         char filename[128];             /* Name of file. */
4337         bool has_previous;              /* Was a "previous" line detected. */
4338 };
4340 struct blame {
4341         struct blame_commit *commit;
4342         unsigned long lineno;
4343         char text[1];
4344 };
4346 static bool
4347 blame_open(struct view *view)
4349         if (*opt_ref || !io_open(&view->io, opt_file)) {
4350                 if (!run_io_rd(&view->io, blame_cat_file_argv, FORMAT_ALL))
4351                         return FALSE;
4352         }
4354         setup_update(view, opt_file);
4355         string_format(view->ref, "%s ...", opt_file);
4357         return TRUE;
4360 static struct blame_commit *
4361 get_blame_commit(struct view *view, const char *id)
4363         size_t i;
4365         for (i = 0; i < view->lines; i++) {
4366                 struct blame *blame = view->line[i].data;
4368                 if (!blame->commit)
4369                         continue;
4371                 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
4372                         return blame->commit;
4373         }
4375         {
4376                 struct blame_commit *commit = calloc(1, sizeof(*commit));
4378                 if (commit)
4379                         string_ncopy(commit->id, id, SIZEOF_REV);
4380                 return commit;
4381         }
4384 static bool
4385 parse_number(const char **posref, size_t *number, size_t min, size_t max)
4387         const char *pos = *posref;
4389         *posref = NULL;
4390         pos = strchr(pos + 1, ' ');
4391         if (!pos || !isdigit(pos[1]))
4392                 return FALSE;
4393         *number = atoi(pos + 1);
4394         if (*number < min || *number > max)
4395                 return FALSE;
4397         *posref = pos;
4398         return TRUE;
4401 static struct blame_commit *
4402 parse_blame_commit(struct view *view, const char *text, int *blamed)
4404         struct blame_commit *commit;
4405         struct blame *blame;
4406         const char *pos = text + SIZEOF_REV - 2;
4407         size_t orig_lineno = 0;
4408         size_t lineno;
4409         size_t group;
4411         if (strlen(text) <= SIZEOF_REV || pos[1] != ' ')
4412                 return NULL;
4414         if (!parse_number(&pos, &orig_lineno, 1, 9999999) ||
4415             !parse_number(&pos, &lineno, 1, view->lines) ||
4416             !parse_number(&pos, &group, 1, view->lines - lineno + 1))
4417                 return NULL;
4419         commit = get_blame_commit(view, text);
4420         if (!commit)
4421                 return NULL;
4423         *blamed += group;
4424         while (group--) {
4425                 struct line *line = &view->line[lineno + group - 1];
4427                 blame = line->data;
4428                 blame->commit = commit;
4429                 blame->lineno = orig_lineno + group - 1;
4430                 line->dirty = 1;
4431         }
4433         return commit;
4436 static bool
4437 blame_read_file(struct view *view, const char *line, bool *read_file)
4439         if (!line) {
4440                 const char **argv = *opt_ref ? blame_ref_argv : blame_head_argv;
4441                 struct io io = {};
4443                 if (view->lines == 0 && !view->parent)
4444                         die("No blame exist for %s", view->vid);
4446                 if (view->lines == 0 || !run_io_rd(&io, argv, FORMAT_ALL)) {
4447                         report("Failed to load blame data");
4448                         return TRUE;
4449                 }
4451                 done_io(view->pipe);
4452                 view->io = io;
4453                 *read_file = FALSE;
4454                 return FALSE;
4456         } else {
4457                 size_t linelen = strlen(line);
4458                 struct blame *blame = malloc(sizeof(*blame) + linelen);
4460                 if (!blame)
4461                         return FALSE;
4463                 blame->commit = NULL;
4464                 strncpy(blame->text, line, linelen);
4465                 blame->text[linelen] = 0;
4466                 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
4467         }
4470 static bool
4471 match_blame_header(const char *name, char **line)
4473         size_t namelen = strlen(name);
4474         bool matched = !strncmp(name, *line, namelen);
4476         if (matched)
4477                 *line += namelen;
4479         return matched;
4482 static bool
4483 blame_read(struct view *view, char *line)
4485         static struct blame_commit *commit = NULL;
4486         static int blamed = 0;
4487         static bool read_file = TRUE;
4489         if (read_file)
4490                 return blame_read_file(view, line, &read_file);
4492         if (!line) {
4493                 /* Reset all! */
4494                 commit = NULL;
4495                 blamed = 0;
4496                 read_file = TRUE;
4497                 string_format(view->ref, "%s", view->vid);
4498                 if (view_is_displayed(view)) {
4499                         update_view_title(view);
4500                         redraw_view_from(view, 0);
4501                 }
4502                 return TRUE;
4503         }
4505         if (!commit) {
4506                 commit = parse_blame_commit(view, line, &blamed);
4507                 string_format(view->ref, "%s %2d%%", view->vid,
4508                               view->lines ? blamed * 100 / view->lines : 0);
4510         } else if (match_blame_header("author ", &line)) {
4511                 commit->author = get_author(line);
4513         } else if (match_blame_header("author-time ", &line)) {
4514                 commit->time = (time_t) atol(line);
4516         } else if (match_blame_header("author-tz ", &line)) {
4517                 parse_timezone(&commit->time, line);
4519         } else if (match_blame_header("summary ", &line)) {
4520                 string_ncopy(commit->title, line, strlen(line));
4522         } else if (match_blame_header("previous ", &line)) {
4523                 commit->has_previous = TRUE;
4525         } else if (match_blame_header("filename ", &line)) {
4526                 string_ncopy(commit->filename, line, strlen(line));
4527                 commit = NULL;
4528         }
4530         return TRUE;
4533 static bool
4534 blame_draw(struct view *view, struct line *line, unsigned int lineno)
4536         struct blame *blame = line->data;
4537         time_t *time = NULL;
4538         const char *id = NULL, *author = NULL;
4539         char text[SIZEOF_STR];
4541         if (blame->commit && *blame->commit->filename) {
4542                 id = blame->commit->id;
4543                 author = blame->commit->author;
4544                 time = &blame->commit->time;
4545         }
4547         if (opt_date && draw_date(view, time))
4548                 return TRUE;
4550         if (opt_author && draw_author(view, author))
4551                 return TRUE;
4553         if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
4554                 return TRUE;
4556         if (draw_lineno(view, lineno))
4557                 return TRUE;
4559         string_expand(text, sizeof(text), blame->text, opt_tab_size);
4560         draw_text(view, LINE_DEFAULT, text, TRUE);
4561         return TRUE;
4564 static bool
4565 check_blame_commit(struct blame *blame, bool check_null_id)
4567         if (!blame->commit)
4568                 report("Commit data not loaded yet");
4569         else if (check_null_id && !strcmp(blame->commit->id, NULL_ID))
4570                 report("No commit exist for the selected line");
4571         else
4572                 return TRUE;
4573         return FALSE;
4576 static void
4577 setup_blame_parent_line(struct view *view, struct blame *blame)
4579         const char *diff_tree_argv[] = {
4580                 "git", "diff-tree", "-U0", blame->commit->id,
4581                         "--", blame->commit->filename, NULL
4582         };
4583         struct io io = {};
4584         int parent_lineno = -1;
4585         int blamed_lineno = -1;
4586         char *line;
4588         if (!run_io(&io, diff_tree_argv, NULL, IO_RD))
4589                 return;
4591         while ((line = io_get(&io, '\n', TRUE))) {
4592                 if (*line == '@') {
4593                         char *pos = strchr(line, '+');
4595                         parent_lineno = atoi(line + 4);
4596                         if (pos)
4597                                 blamed_lineno = atoi(pos + 1);
4599                 } else if (*line == '+' && parent_lineno != -1) {
4600                         if (blame->lineno == blamed_lineno - 1 &&
4601                             !strcmp(blame->text, line + 1)) {
4602                                 view->lineno = parent_lineno ? parent_lineno - 1 : 0;
4603                                 break;
4604                         }
4605                         blamed_lineno++;
4606                 }
4607         }
4609         done_io(&io);
4612 static enum request
4613 blame_request(struct view *view, enum request request, struct line *line)
4615         enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4616         struct blame *blame = line->data;
4618         switch (request) {
4619         case REQ_VIEW_BLAME:
4620                 if (check_blame_commit(blame, TRUE)) {
4621                         string_copy(opt_ref, blame->commit->id);
4622                         string_copy(opt_file, blame->commit->filename);
4623                         if (blame->lineno)
4624                                 view->lineno = blame->lineno;
4625                         open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4626                 }
4627                 break;
4629         case REQ_PARENT:
4630                 if (check_blame_commit(blame, TRUE) &&
4631                     select_commit_parent(blame->commit->id, opt_ref,
4632                                          blame->commit->filename)) {
4633                         string_copy(opt_file, blame->commit->filename);
4634                         setup_blame_parent_line(view, blame);
4635                         open_view(view, REQ_VIEW_BLAME, OPEN_REFRESH);
4636                 }
4637                 break;
4639         case REQ_ENTER:
4640                 if (!check_blame_commit(blame, FALSE))
4641                         break;
4643                 if (view_is_displayed(VIEW(REQ_VIEW_DIFF)) &&
4644                     !strcmp(blame->commit->id, VIEW(REQ_VIEW_DIFF)->ref))
4645                         break;
4647                 if (!strcmp(blame->commit->id, NULL_ID)) {
4648                         struct view *diff = VIEW(REQ_VIEW_DIFF);
4649                         const char *diff_index_argv[] = {
4650                                 "git", "diff-index", "--root", "--patch-with-stat",
4651                                         "-C", "-M", "HEAD", "--", view->vid, NULL
4652                         };
4654                         if (!blame->commit->has_previous) {
4655                                 diff_index_argv[1] = "diff";
4656                                 diff_index_argv[2] = "--no-color";
4657                                 diff_index_argv[6] = "--";
4658                                 diff_index_argv[7] = "/dev/null";
4659                         }
4661                         if (!prepare_update(diff, diff_index_argv, NULL, FORMAT_DASH)) {
4662                                 report("Failed to allocate diff command");
4663                                 break;
4664                         }
4665                         flags |= OPEN_PREPARED;
4666                 }
4668                 open_view(view, REQ_VIEW_DIFF, flags);
4669                 if (VIEW(REQ_VIEW_DIFF)->pipe && !strcmp(blame->commit->id, NULL_ID))
4670                         string_copy_rev(VIEW(REQ_VIEW_DIFF)->ref, NULL_ID);
4671                 break;
4673         default:
4674                 return request;
4675         }
4677         return REQ_NONE;
4680 static bool
4681 blame_grep(struct view *view, struct line *line)
4683         struct blame *blame = line->data;
4684         struct blame_commit *commit = blame->commit;
4685         const char *text[] = {
4686                 blame->text,
4687                 commit ? commit->title : "",
4688                 commit ? commit->id : "",
4689                 commit && opt_author ? commit->author : "",
4690                 commit && opt_date ? mkdate(&commit->time) : "",
4691                 NULL
4692         };
4694         return grep_text(view, text);
4697 static void
4698 blame_select(struct view *view, struct line *line)
4700         struct blame *blame = line->data;
4701         struct blame_commit *commit = blame->commit;
4703         if (!commit)
4704                 return;
4706         if (!strcmp(commit->id, NULL_ID))
4707                 string_ncopy(ref_commit, "HEAD", 4);
4708         else
4709                 string_copy_rev(ref_commit, commit->id);
4712 static struct view_ops blame_ops = {
4713         "line",
4714         NULL,
4715         blame_open,
4716         blame_read,
4717         blame_draw,
4718         blame_request,
4719         blame_grep,
4720         blame_select,
4721 };
4723 /*
4724  * Branch backend
4725  */
4727 struct branch {
4728         const char *author;             /* Author of the last commit. */
4729         time_t time;                    /* Date of the last activity. */
4730         struct ref *ref;                /* Name and commit ID information. */
4731 };
4733 static const enum sort_field branch_sort_fields[] = {
4734         ORDERBY_NAME, ORDERBY_DATE, ORDERBY_AUTHOR
4735 };
4736 static struct sort_state branch_sort_state = SORT_STATE(branch_sort_fields);
4738 static int
4739 branch_compare(const void *l1, const void *l2)
4741         const struct branch *branch1 = ((const struct line *) l1)->data;
4742         const struct branch *branch2 = ((const struct line *) l2)->data;
4744         switch (get_sort_field(branch_sort_state)) {
4745         case ORDERBY_DATE:
4746                 return sort_order(branch_sort_state, branch1->time - branch2->time);
4748         case ORDERBY_AUTHOR:
4749                 return sort_order(branch_sort_state, strcmp(branch1->author, branch2->author));
4751         case ORDERBY_NAME:
4752         default:
4753                 return sort_order(branch_sort_state, strcmp(branch1->ref->name, branch2->ref->name));
4754         }
4757 static bool
4758 branch_draw(struct view *view, struct line *line, unsigned int lineno)
4760         struct branch *branch = line->data;
4761         enum line_type type = branch->ref->head ? LINE_MAIN_HEAD : LINE_DEFAULT;
4763         if (opt_date && draw_date(view, branch->author ? &branch->time : NULL))
4764                 return TRUE;
4766         if (opt_author && draw_author(view, branch->author))
4767                 return TRUE;
4769         draw_text(view, type, branch->ref->name, TRUE);
4770         return TRUE;
4773 static enum request
4774 branch_request(struct view *view, enum request request, struct line *line)
4776         switch (request) {
4777         case REQ_REFRESH:
4778                 load_refs();
4779                 open_view(view, REQ_VIEW_BRANCH, OPEN_REFRESH);
4780                 return REQ_NONE;
4782         case REQ_TOGGLE_SORT_FIELD:
4783         case REQ_TOGGLE_SORT_ORDER:
4784                 sort_view(view, request, &branch_sort_state, branch_compare);
4785                 return REQ_NONE;
4787         case REQ_ENTER:
4788                 open_view(view, REQ_VIEW_MAIN, OPEN_SPLIT);
4789                 return REQ_NONE;
4791         default:
4792                 return request;
4793         }
4796 static bool
4797 branch_read(struct view *view, char *line)
4799         static char id[SIZEOF_REV];
4800         struct branch *reference;
4801         size_t i;
4803         if (!line)
4804                 return TRUE;
4806         switch (get_line_type(line)) {
4807         case LINE_COMMIT:
4808                 string_copy_rev(id, line + STRING_SIZE("commit "));
4809                 return TRUE;
4811         case LINE_AUTHOR:
4812                 for (i = 0, reference = NULL; i < view->lines; i++) {
4813                         struct branch *branch = view->line[i].data;
4815                         if (strcmp(branch->ref->id, id))
4816                                 continue;
4818                         view->line[i].dirty = TRUE;
4819                         if (reference) {
4820                                 branch->author = reference->author;
4821                                 branch->time = reference->time;
4822                                 continue;
4823                         }
4825                         parse_author_line(line + STRING_SIZE("author "),
4826                                           &branch->author, &branch->time);
4827                         reference = branch;
4828                 }
4829                 return TRUE;
4831         default:
4832                 return TRUE;
4833         }
4837 static bool
4838 branch_open_visitor(void *data, struct ref *ref)
4840         struct view *view = data;
4841         struct branch *branch;
4843         if (ref->tag || ref->ltag || ref->remote)
4844                 return TRUE;
4846         branch = calloc(1, sizeof(*branch));
4847         if (!branch)
4848                 return FALSE;
4850         branch->ref = ref;
4851         return !!add_line_data(view, branch, LINE_DEFAULT);
4854 static bool
4855 branch_open(struct view *view)
4857         const char *branch_log[] = {
4858                 "git", "log", "--no-color", "--pretty=raw",
4859                         "--simplify-by-decoration", "--all", NULL
4860         };
4862         if (!run_io_rd(&view->io, branch_log, FORMAT_NONE)) {
4863                 report("Failed to load branch data");
4864                 return TRUE;
4865         }
4867         setup_update(view, view->id);
4868         foreach_ref(branch_open_visitor, view);
4870         return TRUE;
4873 static bool
4874 branch_grep(struct view *view, struct line *line)
4876         struct branch *branch = line->data;
4877         const char *text[] = {
4878                 branch->ref->name,
4879                 branch->author,
4880                 NULL
4881         };
4883         return grep_text(view, text);
4886 static void
4887 branch_select(struct view *view, struct line *line)
4889         struct branch *branch = line->data;
4891         string_copy_rev(view->ref, branch->ref->id);
4892         string_copy_rev(ref_commit, branch->ref->id);
4893         string_copy_rev(ref_head, branch->ref->id);
4896 static struct view_ops branch_ops = {
4897         "branch",
4898         NULL,
4899         branch_open,
4900         branch_read,
4901         branch_draw,
4902         branch_request,
4903         branch_grep,
4904         branch_select,
4905 };
4907 /*
4908  * Status backend
4909  */
4911 struct status {
4912         char status;
4913         struct {
4914                 mode_t mode;
4915                 char rev[SIZEOF_REV];
4916                 char name[SIZEOF_STR];
4917         } old;
4918         struct {
4919                 mode_t mode;
4920                 char rev[SIZEOF_REV];
4921                 char name[SIZEOF_STR];
4922         } new;
4923 };
4925 static char status_onbranch[SIZEOF_STR];
4926 static struct status stage_status;
4927 static enum line_type stage_line_type;
4928 static size_t stage_chunks;
4929 static int *stage_chunk;
4931 DEFINE_ALLOCATOR(realloc_ints, int, 32)
4933 /* This should work even for the "On branch" line. */
4934 static inline bool
4935 status_has_none(struct view *view, struct line *line)
4937         return line < view->line + view->lines && !line[1].data;
4940 /* Get fields from the diff line:
4941  * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
4942  */
4943 static inline bool
4944 status_get_diff(struct status *file, const char *buf, size_t bufsize)
4946         const char *old_mode = buf +  1;
4947         const char *new_mode = buf +  8;
4948         const char *old_rev  = buf + 15;
4949         const char *new_rev  = buf + 56;
4950         const char *status   = buf + 97;
4952         if (bufsize < 98 ||
4953             old_mode[-1] != ':' ||
4954             new_mode[-1] != ' ' ||
4955             old_rev[-1]  != ' ' ||
4956             new_rev[-1]  != ' ' ||
4957             status[-1]   != ' ')
4958                 return FALSE;
4960         file->status = *status;
4962         string_copy_rev(file->old.rev, old_rev);
4963         string_copy_rev(file->new.rev, new_rev);
4965         file->old.mode = strtoul(old_mode, NULL, 8);
4966         file->new.mode = strtoul(new_mode, NULL, 8);
4968         file->old.name[0] = file->new.name[0] = 0;
4970         return TRUE;
4973 static bool
4974 status_run(struct view *view, const char *argv[], char status, enum line_type type)
4976         struct status *unmerged = NULL;
4977         char *buf;
4978         struct io io = {};
4980         if (!run_io(&io, argv, NULL, IO_RD))
4981                 return FALSE;
4983         add_line_data(view, NULL, type);
4985         while ((buf = io_get(&io, 0, TRUE))) {
4986                 struct status *file = unmerged;
4988                 if (!file) {
4989                         file = calloc(1, sizeof(*file));
4990                         if (!file || !add_line_data(view, file, type))
4991                                 goto error_out;
4992                 }
4994                 /* Parse diff info part. */
4995                 if (status) {
4996                         file->status = status;
4997                         if (status == 'A')
4998                                 string_copy(file->old.rev, NULL_ID);
5000                 } else if (!file->status || file == unmerged) {
5001                         if (!status_get_diff(file, buf, strlen(buf)))
5002                                 goto error_out;
5004                         buf = io_get(&io, 0, TRUE);
5005                         if (!buf)
5006                                 break;
5008                         /* Collapse all modified entries that follow an
5009                          * associated unmerged entry. */
5010                         if (unmerged == file) {
5011                                 unmerged->status = 'U';
5012                                 unmerged = NULL;
5013                         } else if (file->status == 'U') {
5014                                 unmerged = file;
5015                         }
5016                 }
5018                 /* Grab the old name for rename/copy. */
5019                 if (!*file->old.name &&
5020                     (file->status == 'R' || file->status == 'C')) {
5021                         string_ncopy(file->old.name, buf, strlen(buf));
5023                         buf = io_get(&io, 0, TRUE);
5024                         if (!buf)
5025                                 break;
5026                 }
5028                 /* git-ls-files just delivers a NUL separated list of
5029                  * file names similar to the second half of the
5030                  * git-diff-* output. */
5031                 string_ncopy(file->new.name, buf, strlen(buf));
5032                 if (!*file->old.name)
5033                         string_copy(file->old.name, file->new.name);
5034                 file = NULL;
5035         }
5037         if (io_error(&io)) {
5038 error_out:
5039                 done_io(&io);
5040                 return FALSE;
5041         }
5043         if (!view->line[view->lines - 1].data)
5044                 add_line_data(view, NULL, LINE_STAT_NONE);
5046         done_io(&io);
5047         return TRUE;
5050 /* Don't show unmerged entries in the staged section. */
5051 static const char *status_diff_index_argv[] = {
5052         "git", "diff-index", "-z", "--diff-filter=ACDMRTXB",
5053                              "--cached", "-M", "HEAD", NULL
5054 };
5056 static const char *status_diff_files_argv[] = {
5057         "git", "diff-files", "-z", NULL
5058 };
5060 static const char *status_list_other_argv[] = {
5061         "git", "ls-files", "-z", "--others", "--exclude-standard", NULL
5062 };
5064 static const char *status_list_no_head_argv[] = {
5065         "git", "ls-files", "-z", "--cached", "--exclude-standard", NULL
5066 };
5068 static const char *update_index_argv[] = {
5069         "git", "update-index", "-q", "--unmerged", "--refresh", NULL
5070 };
5072 /* Restore the previous line number to stay in the context or select a
5073  * line with something that can be updated. */
5074 static void
5075 status_restore(struct view *view)
5077         if (view->p_lineno >= view->lines)
5078                 view->p_lineno = view->lines - 1;
5079         while (view->p_lineno < view->lines && !view->line[view->p_lineno].data)
5080                 view->p_lineno++;
5081         while (view->p_lineno > 0 && !view->line[view->p_lineno].data)
5082                 view->p_lineno--;
5084         /* If the above fails, always skip the "On branch" line. */
5085         if (view->p_lineno < view->lines)
5086                 view->lineno = view->p_lineno;
5087         else
5088                 view->lineno = 1;
5090         if (view->lineno < view->offset)
5091                 view->offset = view->lineno;
5092         else if (view->offset + view->height <= view->lineno)
5093                 view->offset = view->lineno - view->height + 1;
5095         view->p_restore = FALSE;
5098 static void
5099 status_update_onbranch(void)
5101         static const char *paths[][2] = {
5102                 { "rebase-apply/rebasing",      "Rebasing" },
5103                 { "rebase-apply/applying",      "Applying mailbox" },
5104                 { "rebase-apply/",              "Rebasing mailbox" },
5105                 { "rebase-merge/interactive",   "Interactive rebase" },
5106                 { "rebase-merge/",              "Rebase merge" },
5107                 { "MERGE_HEAD",                 "Merging" },
5108                 { "BISECT_LOG",                 "Bisecting" },
5109                 { "HEAD",                       "On branch" },
5110         };
5111         char buf[SIZEOF_STR];
5112         struct stat stat;
5113         int i;
5115         if (is_initial_commit()) {
5116                 string_copy(status_onbranch, "Initial commit");
5117                 return;
5118         }
5120         for (i = 0; i < ARRAY_SIZE(paths); i++) {
5121                 char *head = opt_head;
5123                 if (!string_format(buf, "%s/%s", opt_git_dir, paths[i][0]) ||
5124                     lstat(buf, &stat) < 0)
5125                         continue;
5127                 if (!*opt_head) {
5128                         struct io io = {};
5130                         if (string_format(buf, "%s/rebase-merge/head-name", opt_git_dir) &&
5131                             io_open(&io, buf) &&
5132                             io_read_buf(&io, buf, sizeof(buf))) {
5133                                 head = buf;
5134                                 if (!prefixcmp(head, "refs/heads/"))
5135                                         head += STRING_SIZE("refs/heads/");
5136                         }
5137                 }
5139                 if (!string_format(status_onbranch, "%s %s", paths[i][1], head))
5140                         string_copy(status_onbranch, opt_head);
5141                 return;
5142         }
5144         string_copy(status_onbranch, "Not currently on any branch");
5147 /* First parse staged info using git-diff-index(1), then parse unstaged
5148  * info using git-diff-files(1), and finally untracked files using
5149  * git-ls-files(1). */
5150 static bool
5151 status_open(struct view *view)
5153         reset_view(view);
5155         add_line_data(view, NULL, LINE_STAT_HEAD);
5156         status_update_onbranch();
5158         run_io_bg(update_index_argv);
5160         if (is_initial_commit()) {
5161                 if (!status_run(view, status_list_no_head_argv, 'A', LINE_STAT_STAGED))
5162                         return FALSE;
5163         } else if (!status_run(view, status_diff_index_argv, 0, LINE_STAT_STAGED)) {
5164                 return FALSE;
5165         }
5167         if (!status_run(view, status_diff_files_argv, 0, LINE_STAT_UNSTAGED) ||
5168             !status_run(view, status_list_other_argv, '?', LINE_STAT_UNTRACKED))
5169                 return FALSE;
5171         /* Restore the exact position or use the specialized restore
5172          * mode? */
5173         if (!view->p_restore)
5174                 status_restore(view);
5175         return TRUE;
5178 static bool
5179 status_draw(struct view *view, struct line *line, unsigned int lineno)
5181         struct status *status = line->data;
5182         enum line_type type;
5183         const char *text;
5185         if (!status) {
5186                 switch (line->type) {
5187                 case LINE_STAT_STAGED:
5188                         type = LINE_STAT_SECTION;
5189                         text = "Changes to be committed:";
5190                         break;
5192                 case LINE_STAT_UNSTAGED:
5193                         type = LINE_STAT_SECTION;
5194                         text = "Changed but not updated:";
5195                         break;
5197                 case LINE_STAT_UNTRACKED:
5198                         type = LINE_STAT_SECTION;
5199                         text = "Untracked files:";
5200                         break;
5202                 case LINE_STAT_NONE:
5203                         type = LINE_DEFAULT;
5204                         text = "  (no files)";
5205                         break;
5207                 case LINE_STAT_HEAD:
5208                         type = LINE_STAT_HEAD;
5209                         text = status_onbranch;
5210                         break;
5212                 default:
5213                         return FALSE;
5214                 }
5215         } else {
5216                 static char buf[] = { '?', ' ', ' ', ' ', 0 };
5218                 buf[0] = status->status;
5219                 if (draw_text(view, line->type, buf, TRUE))
5220                         return TRUE;
5221                 type = LINE_DEFAULT;
5222                 text = status->new.name;
5223         }
5225         draw_text(view, type, text, TRUE);
5226         return TRUE;
5229 static enum request
5230 status_load_error(struct view *view, struct view *stage, const char *path)
5232         if (displayed_views() == 2 || display[current_view] != view)
5233                 maximize_view(view);
5234         report("Failed to load '%s': %s", path, io_strerror(&stage->io));
5235         return REQ_NONE;
5238 static enum request
5239 status_enter(struct view *view, struct line *line)
5241         struct status *status = line->data;
5242         const char *oldpath = status ? status->old.name : NULL;
5243         /* Diffs for unmerged entries are empty when passing the new
5244          * path, so leave it empty. */
5245         const char *newpath = status && status->status != 'U' ? status->new.name : NULL;
5246         const char *info;
5247         enum open_flags split;
5248         struct view *stage = VIEW(REQ_VIEW_STAGE);
5250         if (line->type == LINE_STAT_NONE ||
5251             (!status && line[1].type == LINE_STAT_NONE)) {
5252                 report("No file to diff");
5253                 return REQ_NONE;
5254         }
5256         switch (line->type) {
5257         case LINE_STAT_STAGED:
5258                 if (is_initial_commit()) {
5259                         const char *no_head_diff_argv[] = {
5260                                 "git", "diff", "--no-color", "--patch-with-stat",
5261                                         "--", "/dev/null", newpath, NULL
5262                         };
5264                         if (!prepare_update(stage, no_head_diff_argv, opt_cdup, FORMAT_DASH))
5265                                 return status_load_error(view, stage, newpath);
5266                 } else {
5267                         const char *index_show_argv[] = {
5268                                 "git", "diff-index", "--root", "--patch-with-stat",
5269                                         "-C", "-M", "--cached", "HEAD", "--",
5270                                         oldpath, newpath, NULL
5271                         };
5273                         if (!prepare_update(stage, index_show_argv, opt_cdup, FORMAT_DASH))
5274                                 return status_load_error(view, stage, newpath);
5275                 }
5277                 if (status)
5278                         info = "Staged changes to %s";
5279                 else
5280                         info = "Staged changes";
5281                 break;
5283         case LINE_STAT_UNSTAGED:
5284         {
5285                 const char *files_show_argv[] = {
5286                         "git", "diff-files", "--root", "--patch-with-stat",
5287                                 "-C", "-M", "--", oldpath, newpath, NULL
5288                 };
5290                 if (!prepare_update(stage, files_show_argv, opt_cdup, FORMAT_DASH))
5291                         return status_load_error(view, stage, newpath);
5292                 if (status)
5293                         info = "Unstaged changes to %s";
5294                 else
5295                         info = "Unstaged changes";
5296                 break;
5297         }
5298         case LINE_STAT_UNTRACKED:
5299                 if (!newpath) {
5300                         report("No file to show");
5301                         return REQ_NONE;
5302                 }
5304                 if (!suffixcmp(status->new.name, -1, "/")) {
5305                         report("Cannot display a directory");
5306                         return REQ_NONE;
5307                 }
5309                 if (!prepare_update_file(stage, newpath))
5310                         return status_load_error(view, stage, newpath);
5311                 info = "Untracked file %s";
5312                 break;
5314         case LINE_STAT_HEAD:
5315                 return REQ_NONE;
5317         default:
5318                 die("line type %d not handled in switch", line->type);
5319         }
5321         split = view_is_displayed(view) ? OPEN_SPLIT : 0;
5322         open_view(view, REQ_VIEW_STAGE, OPEN_PREPARED | split);
5323         if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
5324                 if (status) {
5325                         stage_status = *status;
5326                 } else {
5327                         memset(&stage_status, 0, sizeof(stage_status));
5328                 }
5330                 stage_line_type = line->type;
5331                 stage_chunks = 0;
5332                 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
5333         }
5335         return REQ_NONE;
5338 static bool
5339 status_exists(struct status *status, enum line_type type)
5341         struct view *view = VIEW(REQ_VIEW_STATUS);
5342         unsigned long lineno;
5344         for (lineno = 0; lineno < view->lines; lineno++) {
5345                 struct line *line = &view->line[lineno];
5346                 struct status *pos = line->data;
5348                 if (line->type != type)
5349                         continue;
5350                 if (!pos && (!status || !status->status) && line[1].data) {
5351                         select_view_line(view, lineno);
5352                         return TRUE;
5353                 }
5354                 if (pos && !strcmp(status->new.name, pos->new.name)) {
5355                         select_view_line(view, lineno);
5356                         return TRUE;
5357                 }
5358         }
5360         return FALSE;
5364 static bool
5365 status_update_prepare(struct io *io, enum line_type type)
5367         const char *staged_argv[] = {
5368                 "git", "update-index", "-z", "--index-info", NULL
5369         };
5370         const char *others_argv[] = {
5371                 "git", "update-index", "-z", "--add", "--remove", "--stdin", NULL
5372         };
5374         switch (type) {
5375         case LINE_STAT_STAGED:
5376                 return run_io(io, staged_argv, opt_cdup, IO_WR);
5378         case LINE_STAT_UNSTAGED:
5379                 return run_io(io, others_argv, opt_cdup, IO_WR);
5381         case LINE_STAT_UNTRACKED:
5382                 return run_io(io, others_argv, NULL, IO_WR);
5384         default:
5385                 die("line type %d not handled in switch", type);
5386                 return FALSE;
5387         }
5390 static bool
5391 status_update_write(struct io *io, struct status *status, enum line_type type)
5393         char buf[SIZEOF_STR];
5394         size_t bufsize = 0;
5396         switch (type) {
5397         case LINE_STAT_STAGED:
5398                 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
5399                                         status->old.mode,
5400                                         status->old.rev,
5401                                         status->old.name, 0))
5402                         return FALSE;
5403                 break;
5405         case LINE_STAT_UNSTAGED:
5406         case LINE_STAT_UNTRACKED:
5407                 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
5408                         return FALSE;
5409                 break;
5411         default:
5412                 die("line type %d not handled in switch", type);
5413         }
5415         return io_write(io, buf, bufsize);
5418 static bool
5419 status_update_file(struct status *status, enum line_type type)
5421         struct io io = {};
5422         bool result;
5424         if (!status_update_prepare(&io, type))
5425                 return FALSE;
5427         result = status_update_write(&io, status, type);
5428         return done_io(&io) && result;
5431 static bool
5432 status_update_files(struct view *view, struct line *line)
5434         char buf[sizeof(view->ref)];
5435         struct io io = {};
5436         bool result = TRUE;
5437         struct line *pos = view->line + view->lines;
5438         int files = 0;
5439         int file, done;
5440         int cursor_y, cursor_x;
5442         if (!status_update_prepare(&io, line->type))
5443                 return FALSE;
5445         for (pos = line; pos < view->line + view->lines && pos->data; pos++)
5446                 files++;
5448         string_copy(buf, view->ref);
5449         getsyx(cursor_y, cursor_x);
5450         for (file = 0, done = 5; result && file < files; line++, file++) {
5451                 int almost_done = file * 100 / files;
5453                 if (almost_done > done) {
5454                         done = almost_done;
5455                         string_format(view->ref, "updating file %u of %u (%d%% done)",
5456                                       file, files, done);
5457                         update_view_title(view);
5458                         setsyx(cursor_y, cursor_x);
5459                         doupdate();
5460                 }
5461                 result = status_update_write(&io, line->data, line->type);
5462         }
5463         string_copy(view->ref, buf);
5465         return done_io(&io) && result;
5468 static bool
5469 status_update(struct view *view)
5471         struct line *line = &view->line[view->lineno];
5473         assert(view->lines);
5475         if (!line->data) {
5476                 /* This should work even for the "On branch" line. */
5477                 if (line < view->line + view->lines && !line[1].data) {
5478                         report("Nothing to update");
5479                         return FALSE;
5480                 }
5482                 if (!status_update_files(view, line + 1)) {
5483                         report("Failed to update file status");
5484                         return FALSE;
5485                 }
5487         } else if (!status_update_file(line->data, line->type)) {
5488                 report("Failed to update file status");
5489                 return FALSE;
5490         }
5492         return TRUE;
5495 static bool
5496 status_revert(struct status *status, enum line_type type, bool has_none)
5498         if (!status || type != LINE_STAT_UNSTAGED) {
5499                 if (type == LINE_STAT_STAGED) {
5500                         report("Cannot revert changes to staged files");
5501                 } else if (type == LINE_STAT_UNTRACKED) {
5502                         report("Cannot revert changes to untracked files");
5503                 } else if (has_none) {
5504                         report("Nothing to revert");
5505                 } else {
5506                         report("Cannot revert changes to multiple files");
5507                 }
5508                 return FALSE;
5510         } else {
5511                 char mode[10] = "100644";
5512                 const char *reset_argv[] = {
5513                         "git", "update-index", "--cacheinfo", mode,
5514                                 status->old.rev, status->old.name, NULL
5515                 };
5516                 const char *checkout_argv[] = {
5517                         "git", "checkout", "--", status->old.name, NULL
5518                 };
5520                 if (!prompt_yesno("Are you sure you want to overwrite any changes?"))
5521                         return FALSE;
5522                 string_format(mode, "%o", status->old.mode);
5523                 return (status->status != 'U' || run_io_fg(reset_argv, opt_cdup)) &&
5524                         run_io_fg(checkout_argv, opt_cdup);
5525         }
5528 static enum request
5529 status_request(struct view *view, enum request request, struct line *line)
5531         struct status *status = line->data;
5533         switch (request) {
5534         case REQ_STATUS_UPDATE:
5535                 if (!status_update(view))
5536                         return REQ_NONE;
5537                 break;
5539         case REQ_STATUS_REVERT:
5540                 if (!status_revert(status, line->type, status_has_none(view, line)))
5541                         return REQ_NONE;
5542                 break;
5544         case REQ_STATUS_MERGE:
5545                 if (!status || status->status != 'U') {
5546                         report("Merging only possible for files with unmerged status ('U').");
5547                         return REQ_NONE;
5548                 }
5549                 open_mergetool(status->new.name);
5550                 break;
5552         case REQ_EDIT:
5553                 if (!status)
5554                         return request;
5555                 if (status->status == 'D') {
5556                         report("File has been deleted.");
5557                         return REQ_NONE;
5558                 }
5560                 open_editor(status->status != '?', status->new.name);
5561                 break;
5563         case REQ_VIEW_BLAME:
5564                 if (status) {
5565                         string_copy(opt_file, status->new.name);
5566                         opt_ref[0] = 0;
5567                 }
5568                 return request;
5570         case REQ_ENTER:
5571                 /* After returning the status view has been split to
5572                  * show the stage view. No further reloading is
5573                  * necessary. */
5574                 return status_enter(view, line);
5576         case REQ_REFRESH:
5577                 /* Simply reload the view. */
5578                 break;
5580         default:
5581                 return request;
5582         }
5584         open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
5586         return REQ_NONE;
5589 static void
5590 status_select(struct view *view, struct line *line)
5592         struct status *status = line->data;
5593         char file[SIZEOF_STR] = "all files";
5594         const char *text;
5595         const char *key;
5597         if (status && !string_format(file, "'%s'", status->new.name))
5598                 return;
5600         if (!status && line[1].type == LINE_STAT_NONE)
5601                 line++;
5603         switch (line->type) {
5604         case LINE_STAT_STAGED:
5605                 text = "Press %s to unstage %s for commit";
5606                 break;
5608         case LINE_STAT_UNSTAGED:
5609                 text = "Press %s to stage %s for commit";
5610                 break;
5612         case LINE_STAT_UNTRACKED:
5613                 text = "Press %s to stage %s for addition";
5614                 break;
5616         case LINE_STAT_HEAD:
5617         case LINE_STAT_NONE:
5618                 text = "Nothing to update";
5619                 break;
5621         default:
5622                 die("line type %d not handled in switch", line->type);
5623         }
5625         if (status && status->status == 'U') {
5626                 text = "Press %s to resolve conflict in %s";
5627                 key = get_key(REQ_STATUS_MERGE);
5629         } else {
5630                 key = get_key(REQ_STATUS_UPDATE);
5631         }
5633         string_format(view->ref, text, key, file);
5636 static bool
5637 status_grep(struct view *view, struct line *line)
5639         struct status *status = line->data;
5641         if (status) {
5642                 const char buf[2] = { status->status, 0 };
5643                 const char *text[] = { status->new.name, buf, NULL };
5645                 return grep_text(view, text);
5646         }
5648         return FALSE;
5651 static struct view_ops status_ops = {
5652         "file",
5653         NULL,
5654         status_open,
5655         NULL,
5656         status_draw,
5657         status_request,
5658         status_grep,
5659         status_select,
5660 };
5663 static bool
5664 stage_diff_write(struct io *io, struct line *line, struct line *end)
5666         while (line < end) {
5667                 if (!io_write(io, line->data, strlen(line->data)) ||
5668                     !io_write(io, "\n", 1))
5669                         return FALSE;
5670                 line++;
5671                 if (line->type == LINE_DIFF_CHUNK ||
5672                     line->type == LINE_DIFF_HEADER)
5673                         break;
5674         }
5676         return TRUE;
5679 static struct line *
5680 stage_diff_find(struct view *view, struct line *line, enum line_type type)
5682         for (; view->line < line; line--)
5683                 if (line->type == type)
5684                         return line;
5686         return NULL;
5689 static bool
5690 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
5692         const char *apply_argv[SIZEOF_ARG] = {
5693                 "git", "apply", "--whitespace=nowarn", NULL
5694         };
5695         struct line *diff_hdr;
5696         struct io io = {};
5697         int argc = 3;
5699         diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
5700         if (!diff_hdr)
5701                 return FALSE;
5703         if (!revert)
5704                 apply_argv[argc++] = "--cached";
5705         if (revert || stage_line_type == LINE_STAT_STAGED)
5706                 apply_argv[argc++] = "-R";
5707         apply_argv[argc++] = "-";
5708         apply_argv[argc++] = NULL;
5709         if (!run_io(&io, apply_argv, opt_cdup, IO_WR))
5710                 return FALSE;
5712         if (!stage_diff_write(&io, diff_hdr, chunk) ||
5713             !stage_diff_write(&io, chunk, view->line + view->lines))
5714                 chunk = NULL;
5716         done_io(&io);
5717         run_io_bg(update_index_argv);
5719         return chunk ? TRUE : FALSE;
5722 static bool
5723 stage_update(struct view *view, struct line *line)
5725         struct line *chunk = NULL;
5727         if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
5728                 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5730         if (chunk) {
5731                 if (!stage_apply_chunk(view, chunk, FALSE)) {
5732                         report("Failed to apply chunk");
5733                         return FALSE;
5734                 }
5736         } else if (!stage_status.status) {
5737                 view = VIEW(REQ_VIEW_STATUS);
5739                 for (line = view->line; line < view->line + view->lines; line++)
5740                         if (line->type == stage_line_type)
5741                                 break;
5743                 if (!status_update_files(view, line + 1)) {
5744                         report("Failed to update files");
5745                         return FALSE;
5746                 }
5748         } else if (!status_update_file(&stage_status, stage_line_type)) {
5749                 report("Failed to update file");
5750                 return FALSE;
5751         }
5753         return TRUE;
5756 static bool
5757 stage_revert(struct view *view, struct line *line)
5759         struct line *chunk = NULL;
5761         if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
5762                 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
5764         if (chunk) {
5765                 if (!prompt_yesno("Are you sure you want to revert changes?"))
5766                         return FALSE;
5768                 if (!stage_apply_chunk(view, chunk, TRUE)) {
5769                         report("Failed to revert chunk");
5770                         return FALSE;
5771                 }
5772                 return TRUE;
5774         } else {
5775                 return status_revert(stage_status.status ? &stage_status : NULL,
5776                                      stage_line_type, FALSE);
5777         }
5781 static void
5782 stage_next(struct view *view, struct line *line)
5784         int i;
5786         if (!stage_chunks) {
5787                 for (line = view->line; line < view->line + view->lines; line++) {
5788                         if (line->type != LINE_DIFF_CHUNK)
5789                                 continue;
5791                         if (!realloc_ints(&stage_chunk, stage_chunks, 1)) {
5792                                 report("Allocation failure");
5793                                 return;
5794                         }
5796                         stage_chunk[stage_chunks++] = line - view->line;
5797                 }
5798         }
5800         for (i = 0; i < stage_chunks; i++) {
5801                 if (stage_chunk[i] > view->lineno) {
5802                         do_scroll_view(view, stage_chunk[i] - view->lineno);
5803                         report("Chunk %d of %d", i + 1, stage_chunks);
5804                         return;
5805                 }
5806         }
5808         report("No next chunk found");
5811 static enum request
5812 stage_request(struct view *view, enum request request, struct line *line)
5814         switch (request) {
5815         case REQ_STATUS_UPDATE:
5816                 if (!stage_update(view, line))
5817                         return REQ_NONE;
5818                 break;
5820         case REQ_STATUS_REVERT:
5821                 if (!stage_revert(view, line))
5822                         return REQ_NONE;
5823                 break;
5825         case REQ_STAGE_NEXT:
5826                 if (stage_line_type == LINE_STAT_UNTRACKED) {
5827                         report("File is untracked; press %s to add",
5828                                get_key(REQ_STATUS_UPDATE));
5829                         return REQ_NONE;
5830                 }
5831                 stage_next(view, line);
5832                 return REQ_NONE;
5834         case REQ_EDIT:
5835                 if (!stage_status.new.name[0])
5836                         return request;
5837                 if (stage_status.status == 'D') {
5838                         report("File has been deleted.");
5839                         return REQ_NONE;
5840                 }
5842                 open_editor(stage_status.status != '?', stage_status.new.name);
5843                 break;
5845         case REQ_REFRESH:
5846                 /* Reload everything ... */
5847                 break;
5849         case REQ_VIEW_BLAME:
5850                 if (stage_status.new.name[0]) {
5851                         string_copy(opt_file, stage_status.new.name);
5852                         opt_ref[0] = 0;
5853                 }
5854                 return request;
5856         case REQ_ENTER:
5857                 return pager_request(view, request, line);
5859         default:
5860                 return request;
5861         }
5863         VIEW(REQ_VIEW_STATUS)->p_restore = TRUE;
5864         open_view(view, REQ_VIEW_STATUS, OPEN_REFRESH);
5866         /* Check whether the staged entry still exists, and close the
5867          * stage view if it doesn't. */
5868         if (!status_exists(&stage_status, stage_line_type)) {
5869                 status_restore(VIEW(REQ_VIEW_STATUS));
5870                 return REQ_VIEW_CLOSE;
5871         }
5873         if (stage_line_type == LINE_STAT_UNTRACKED) {
5874                 if (!suffixcmp(stage_status.new.name, -1, "/")) {
5875                         report("Cannot display a directory");
5876                         return REQ_NONE;
5877                 }
5879                 if (!prepare_update_file(view, stage_status.new.name)) {
5880                         report("Failed to open file: %s", strerror(errno));
5881                         return REQ_NONE;
5882                 }
5883         }
5884         open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
5886         return REQ_NONE;
5889 static struct view_ops stage_ops = {
5890         "line",
5891         NULL,
5892         NULL,
5893         pager_read,
5894         pager_draw,
5895         stage_request,
5896         pager_grep,
5897         pager_select,
5898 };
5901 /*
5902  * Revision graph
5903  */
5905 struct commit {
5906         char id[SIZEOF_REV];            /* SHA1 ID. */
5907         char title[128];                /* First line of the commit message. */
5908         const char *author;             /* Author of the commit. */
5909         time_t time;                    /* Date from the author ident. */
5910         struct ref_list *refs;          /* Repository references. */
5911         chtype graph[SIZEOF_REVGRAPH];  /* Ancestry chain graphics. */
5912         size_t graph_size;              /* The width of the graph array. */
5913         bool has_parents;               /* Rewritten --parents seen. */
5914 };
5916 /* Size of rev graph with no  "padding" columns */
5917 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
5919 struct rev_graph {
5920         struct rev_graph *prev, *next, *parents;
5921         char rev[SIZEOF_REVITEMS][SIZEOF_REV];
5922         size_t size;
5923         struct commit *commit;
5924         size_t pos;
5925         unsigned int boundary:1;
5926 };
5928 /* Parents of the commit being visualized. */
5929 static struct rev_graph graph_parents[4];
5931 /* The current stack of revisions on the graph. */
5932 static struct rev_graph graph_stacks[4] = {
5933         { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
5934         { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
5935         { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
5936         { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
5937 };
5939 static inline bool
5940 graph_parent_is_merge(struct rev_graph *graph)
5942         return graph->parents->size > 1;
5945 static inline void
5946 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
5948         struct commit *commit = graph->commit;
5950         if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
5951                 commit->graph[commit->graph_size++] = symbol;
5954 static void
5955 clear_rev_graph(struct rev_graph *graph)
5957         graph->boundary = 0;
5958         graph->size = graph->pos = 0;
5959         graph->commit = NULL;
5960         memset(graph->parents, 0, sizeof(*graph->parents));
5963 static void
5964 done_rev_graph(struct rev_graph *graph)
5966         if (graph_parent_is_merge(graph) &&
5967             graph->pos < graph->size - 1 &&
5968             graph->next->size == graph->size + graph->parents->size - 1) {
5969                 size_t i = graph->pos + graph->parents->size - 1;
5971                 graph->commit->graph_size = i * 2;
5972                 while (i < graph->next->size - 1) {
5973                         append_to_rev_graph(graph, ' ');
5974                         append_to_rev_graph(graph, '\\');
5975                         i++;
5976                 }
5977         }
5979         clear_rev_graph(graph);
5982 static void
5983 push_rev_graph(struct rev_graph *graph, const char *parent)
5985         int i;
5987         /* "Collapse" duplicate parents lines.
5988          *
5989          * FIXME: This needs to also update update the drawn graph but
5990          * for now it just serves as a method for pruning graph lines. */
5991         for (i = 0; i < graph->size; i++)
5992                 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
5993                         return;
5995         if (graph->size < SIZEOF_REVITEMS) {
5996                 string_copy_rev(graph->rev[graph->size++], parent);
5997         }
6000 static chtype
6001 get_rev_graph_symbol(struct rev_graph *graph)
6003         chtype symbol;
6005         if (graph->boundary)
6006                 symbol = REVGRAPH_BOUND;
6007         else if (graph->parents->size == 0)
6008                 symbol = REVGRAPH_INIT;
6009         else if (graph_parent_is_merge(graph))
6010                 symbol = REVGRAPH_MERGE;
6011         else if (graph->pos >= graph->size)
6012                 symbol = REVGRAPH_BRANCH;
6013         else
6014                 symbol = REVGRAPH_COMMIT;
6016         return symbol;
6019 static void
6020 draw_rev_graph(struct rev_graph *graph)
6022         struct rev_filler {
6023                 chtype separator, line;
6024         };
6025         enum { DEFAULT, RSHARP, RDIAG, LDIAG };
6026         static struct rev_filler fillers[] = {
6027                 { ' ',  '|' },
6028                 { '`',  '.' },
6029                 { '\'', ' ' },
6030                 { '/',  ' ' },
6031         };
6032         chtype symbol = get_rev_graph_symbol(graph);
6033         struct rev_filler *filler;
6034         size_t i;
6036         if (opt_line_graphics)
6037                 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
6039         filler = &fillers[DEFAULT];
6041         for (i = 0; i < graph->pos; i++) {
6042                 append_to_rev_graph(graph, filler->line);
6043                 if (graph_parent_is_merge(graph->prev) &&
6044                     graph->prev->pos == i)
6045                         filler = &fillers[RSHARP];
6047                 append_to_rev_graph(graph, filler->separator);
6048         }
6050         /* Place the symbol for this revision. */
6051         append_to_rev_graph(graph, symbol);
6053         if (graph->prev->size > graph->size)
6054                 filler = &fillers[RDIAG];
6055         else
6056                 filler = &fillers[DEFAULT];
6058         i++;
6060         for (; i < graph->size; i++) {
6061                 append_to_rev_graph(graph, filler->separator);
6062                 append_to_rev_graph(graph, filler->line);
6063                 if (graph_parent_is_merge(graph->prev) &&
6064                     i < graph->prev->pos + graph->parents->size)
6065                         filler = &fillers[RSHARP];
6066                 if (graph->prev->size > graph->size)
6067                         filler = &fillers[LDIAG];
6068         }
6070         if (graph->prev->size > graph->size) {
6071                 append_to_rev_graph(graph, filler->separator);
6072                 if (filler->line != ' ')
6073                         append_to_rev_graph(graph, filler->line);
6074         }
6077 /* Prepare the next rev graph */
6078 static void
6079 prepare_rev_graph(struct rev_graph *graph)
6081         size_t i;
6083         /* First, traverse all lines of revisions up to the active one. */
6084         for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
6085                 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
6086                         break;
6088                 push_rev_graph(graph->next, graph->rev[graph->pos]);
6089         }
6091         /* Interleave the new revision parent(s). */
6092         for (i = 0; !graph->boundary && i < graph->parents->size; i++)
6093                 push_rev_graph(graph->next, graph->parents->rev[i]);
6095         /* Lastly, put any remaining revisions. */
6096         for (i = graph->pos + 1; i < graph->size; i++)
6097                 push_rev_graph(graph->next, graph->rev[i]);
6100 static void
6101 update_rev_graph(struct view *view, struct rev_graph *graph)
6103         /* If this is the finalizing update ... */
6104         if (graph->commit)
6105                 prepare_rev_graph(graph);
6107         /* Graph visualization needs a one rev look-ahead,
6108          * so the first update doesn't visualize anything. */
6109         if (!graph->prev->commit)
6110                 return;
6112         if (view->lines > 2)
6113                 view->line[view->lines - 3].dirty = 1;
6114         if (view->lines > 1)
6115                 view->line[view->lines - 2].dirty = 1;
6116         draw_rev_graph(graph->prev);
6117         done_rev_graph(graph->prev->prev);
6121 /*
6122  * Main view backend
6123  */
6125 static const char *main_argv[SIZEOF_ARG] = {
6126         "git", "log", "--no-color", "--pretty=raw", "--parents",
6127                       "--topo-order", "%(head)", NULL
6128 };
6130 static bool
6131 main_draw(struct view *view, struct line *line, unsigned int lineno)
6133         struct commit *commit = line->data;
6135         if (!commit->author)
6136                 return FALSE;
6138         if (opt_date && draw_date(view, &commit->time))
6139                 return TRUE;
6141         if (opt_author && draw_author(view, commit->author))
6142                 return TRUE;
6144         if (opt_rev_graph && commit->graph_size &&
6145             draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
6146                 return TRUE;
6148         if (opt_show_refs && commit->refs) {
6149                 size_t i;
6151                 for (i = 0; i < commit->refs->size; i++) {
6152                         struct ref *ref = commit->refs->refs[i];
6153                         enum line_type type;
6155                         if (ref->head)
6156                                 type = LINE_MAIN_HEAD;
6157                         else if (ref->ltag)
6158                                 type = LINE_MAIN_LOCAL_TAG;
6159                         else if (ref->tag)
6160                                 type = LINE_MAIN_TAG;
6161                         else if (ref->tracked)
6162                                 type = LINE_MAIN_TRACKED;
6163                         else if (ref->remote)
6164                                 type = LINE_MAIN_REMOTE;
6165                         else
6166                                 type = LINE_MAIN_REF;
6168                         if (draw_text(view, type, "[", TRUE) ||
6169                             draw_text(view, type, ref->name, TRUE) ||
6170                             draw_text(view, type, "]", TRUE))
6171                                 return TRUE;
6173                         if (draw_text(view, LINE_DEFAULT, " ", TRUE))
6174                                 return TRUE;
6175                 }
6176         }
6178         draw_text(view, LINE_DEFAULT, commit->title, TRUE);
6179         return TRUE;
6182 /* Reads git log --pretty=raw output and parses it into the commit struct. */
6183 static bool
6184 main_read(struct view *view, char *line)
6186         static struct rev_graph *graph = graph_stacks;
6187         enum line_type type;
6188         struct commit *commit;
6190         if (!line) {
6191                 int i;
6193                 if (!view->lines && !view->parent)
6194                         die("No revisions match the given arguments.");
6195                 if (view->lines > 0) {
6196                         commit = view->line[view->lines - 1].data;
6197                         view->line[view->lines - 1].dirty = 1;
6198                         if (!commit->author) {
6199                                 view->lines--;
6200                                 free(commit);
6201                                 graph->commit = NULL;
6202                         }
6203                 }
6204                 update_rev_graph(view, graph);
6206                 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
6207                         clear_rev_graph(&graph_stacks[i]);
6208                 return TRUE;
6209         }
6211         type = get_line_type(line);
6212         if (type == LINE_COMMIT) {
6213                 commit = calloc(1, sizeof(struct commit));
6214                 if (!commit)
6215                         return FALSE;
6217                 line += STRING_SIZE("commit ");
6218                 if (*line == '-') {
6219                         graph->boundary = 1;
6220                         line++;
6221                 }
6223                 string_copy_rev(commit->id, line);
6224                 commit->refs = get_ref_list(commit->id);
6225                 graph->commit = commit;
6226                 add_line_data(view, commit, LINE_MAIN_COMMIT);
6228                 while ((line = strchr(line, ' '))) {
6229                         line++;
6230                         push_rev_graph(graph->parents, line);
6231                         commit->has_parents = TRUE;
6232                 }
6233                 return TRUE;
6234         }
6236         if (!view->lines)
6237                 return TRUE;
6238         commit = view->line[view->lines - 1].data;
6240         switch (type) {
6241         case LINE_PARENT:
6242                 if (commit->has_parents)
6243                         break;
6244                 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
6245                 break;
6247         case LINE_AUTHOR:
6248                 parse_author_line(line + STRING_SIZE("author "),
6249                                   &commit->author, &commit->time);
6250                 update_rev_graph(view, graph);
6251                 graph = graph->next;
6252                 break;
6254         default:
6255                 /* Fill in the commit title if it has not already been set. */
6256                 if (commit->title[0])
6257                         break;
6259                 /* Require titles to start with a non-space character at the
6260                  * offset used by git log. */
6261                 if (strncmp(line, "    ", 4))
6262                         break;
6263                 line += 4;
6264                 /* Well, if the title starts with a whitespace character,
6265                  * try to be forgiving.  Otherwise we end up with no title. */
6266                 while (isspace(*line))
6267                         line++;
6268                 if (*line == '\0')
6269                         break;
6270                 /* FIXME: More graceful handling of titles; append "..." to
6271                  * shortened titles, etc. */
6273                 string_expand(commit->title, sizeof(commit->title), line, 1);
6274                 view->line[view->lines - 1].dirty = 1;
6275         }
6277         return TRUE;
6280 static enum request
6281 main_request(struct view *view, enum request request, struct line *line)
6283         enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
6285         switch (request) {
6286         case REQ_ENTER:
6287                 open_view(view, REQ_VIEW_DIFF, flags);
6288                 break;
6289         case REQ_REFRESH:
6290                 load_refs();
6291                 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
6292                 break;
6293         default:
6294                 return request;
6295         }
6297         return REQ_NONE;
6300 static bool
6301 grep_refs(struct ref_list *list, regex_t *regex)
6303         regmatch_t pmatch;
6304         size_t i;
6306         if (!opt_show_refs || !list)
6307                 return FALSE;
6309         for (i = 0; i < list->size; i++) {
6310                 if (regexec(regex, list->refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
6311                         return TRUE;
6312         }
6314         return FALSE;
6317 static bool
6318 main_grep(struct view *view, struct line *line)
6320         struct commit *commit = line->data;
6321         const char *text[] = {
6322                 commit->title,
6323                 opt_author ? commit->author : "",
6324                 opt_date ? mkdate(&commit->time) : "",
6325                 NULL
6326         };
6328         return grep_text(view, text) || grep_refs(commit->refs, view->regex);
6331 static void
6332 main_select(struct view *view, struct line *line)
6334         struct commit *commit = line->data;
6336         string_copy_rev(view->ref, commit->id);
6337         string_copy_rev(ref_commit, view->ref);
6340 static struct view_ops main_ops = {
6341         "commit",
6342         main_argv,
6343         NULL,
6344         main_read,
6345         main_draw,
6346         main_request,
6347         main_grep,
6348         main_select,
6349 };
6352 /*
6353  * Unicode / UTF-8 handling
6354  *
6355  * NOTE: Much of the following code for dealing with Unicode is derived from
6356  * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
6357  * src/intl/charset.c from the UTF-8 branch commit elinks-0.11.0-g31f2c28.
6358  */
6360 static inline int
6361 unicode_width(unsigned long c)
6363         if (c >= 0x1100 &&
6364            (c <= 0x115f                         /* Hangul Jamo */
6365             || c == 0x2329
6366             || c == 0x232a
6367             || (c >= 0x2e80  && c <= 0xa4cf && c != 0x303f)
6368                                                 /* CJK ... Yi */
6369             || (c >= 0xac00  && c <= 0xd7a3)    /* Hangul Syllables */
6370             || (c >= 0xf900  && c <= 0xfaff)    /* CJK Compatibility Ideographs */
6371             || (c >= 0xfe30  && c <= 0xfe6f)    /* CJK Compatibility Forms */
6372             || (c >= 0xff00  && c <= 0xff60)    /* Fullwidth Forms */
6373             || (c >= 0xffe0  && c <= 0xffe6)
6374             || (c >= 0x20000 && c <= 0x2fffd)
6375             || (c >= 0x30000 && c <= 0x3fffd)))
6376                 return 2;
6378         if (c == '\t')
6379                 return opt_tab_size;
6381         return 1;
6384 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
6385  * Illegal bytes are set one. */
6386 static const unsigned char utf8_bytes[256] = {
6387         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,
6388         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,
6389         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,
6390         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,
6391         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,
6392         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,
6393         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,
6394         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,
6395 };
6397 /* Decode UTF-8 multi-byte representation into a Unicode character. */
6398 static inline unsigned long
6399 utf8_to_unicode(const char *string, size_t length)
6401         unsigned long unicode;
6403         switch (length) {
6404         case 1:
6405                 unicode  =   string[0];
6406                 break;
6407         case 2:
6408                 unicode  =  (string[0] & 0x1f) << 6;
6409                 unicode +=  (string[1] & 0x3f);
6410                 break;
6411         case 3:
6412                 unicode  =  (string[0] & 0x0f) << 12;
6413                 unicode += ((string[1] & 0x3f) << 6);
6414                 unicode +=  (string[2] & 0x3f);
6415                 break;
6416         case 4:
6417                 unicode  =  (string[0] & 0x0f) << 18;
6418                 unicode += ((string[1] & 0x3f) << 12);
6419                 unicode += ((string[2] & 0x3f) << 6);
6420                 unicode +=  (string[3] & 0x3f);
6421                 break;
6422         case 5:
6423                 unicode  =  (string[0] & 0x0f) << 24;
6424                 unicode += ((string[1] & 0x3f) << 18);
6425                 unicode += ((string[2] & 0x3f) << 12);
6426                 unicode += ((string[3] & 0x3f) << 6);
6427                 unicode +=  (string[4] & 0x3f);
6428                 break;
6429         case 6:
6430                 unicode  =  (string[0] & 0x01) << 30;
6431                 unicode += ((string[1] & 0x3f) << 24);
6432                 unicode += ((string[2] & 0x3f) << 18);
6433                 unicode += ((string[3] & 0x3f) << 12);
6434                 unicode += ((string[4] & 0x3f) << 6);
6435                 unicode +=  (string[5] & 0x3f);
6436                 break;
6437         default:
6438                 die("Invalid Unicode length");
6439         }
6441         /* Invalid characters could return the special 0xfffd value but NUL
6442          * should be just as good. */
6443         return unicode > 0xffff ? 0 : unicode;
6446 /* Calculates how much of string can be shown within the given maximum width
6447  * and sets trimmed parameter to non-zero value if all of string could not be
6448  * shown. If the reserve flag is TRUE, it will reserve at least one
6449  * trailing character, which can be useful when drawing a delimiter.
6450  *
6451  * Returns the number of bytes to output from string to satisfy max_width. */
6452 static size_t
6453 utf8_length(const char **start, size_t skip, int *width, size_t max_width, int *trimmed, bool reserve)
6455         const char *string = *start;
6456         const char *end = strchr(string, '\0');
6457         unsigned char last_bytes = 0;
6458         size_t last_ucwidth = 0;
6460         *width = 0;
6461         *trimmed = 0;
6463         while (string < end) {
6464                 int c = *(unsigned char *) string;
6465                 unsigned char bytes = utf8_bytes[c];
6466                 size_t ucwidth;
6467                 unsigned long unicode;
6469                 if (string + bytes > end)
6470                         break;
6472                 /* Change representation to figure out whether
6473                  * it is a single- or double-width character. */
6475                 unicode = utf8_to_unicode(string, bytes);
6476                 /* FIXME: Graceful handling of invalid Unicode character. */
6477                 if (!unicode)
6478                         break;
6480                 ucwidth = unicode_width(unicode);
6481                 if (skip > 0) {
6482                         skip -= ucwidth <= skip ? ucwidth : skip;
6483                         *start += bytes;
6484                 }
6485                 *width  += ucwidth;
6486                 if (*width > max_width) {
6487                         *trimmed = 1;
6488                         *width -= ucwidth;
6489                         if (reserve && *width == max_width) {
6490                                 string -= last_bytes;
6491                                 *width -= last_ucwidth;
6492                         }
6493                         break;
6494                 }
6496                 string  += bytes;
6497                 last_bytes = ucwidth ? bytes : 0;
6498                 last_ucwidth = ucwidth;
6499         }
6501         return string - *start;
6505 /*
6506  * Status management
6507  */
6509 /* Whether or not the curses interface has been initialized. */
6510 static bool cursed = FALSE;
6512 /* Terminal hacks and workarounds. */
6513 static bool use_scroll_redrawwin;
6514 static bool use_scroll_status_wclear;
6516 /* The status window is used for polling keystrokes. */
6517 static WINDOW *status_win;
6519 /* Reading from the prompt? */
6520 static bool input_mode = FALSE;
6522 static bool status_empty = FALSE;
6524 /* Update status and title window. */
6525 static void
6526 report(const char *msg, ...)
6528         struct view *view = display[current_view];
6530         if (input_mode)
6531                 return;
6533         if (!view) {
6534                 char buf[SIZEOF_STR];
6535                 va_list args;
6537                 va_start(args, msg);
6538                 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
6539                         buf[sizeof(buf) - 1] = 0;
6540                         buf[sizeof(buf) - 2] = '.';
6541                         buf[sizeof(buf) - 3] = '.';
6542                         buf[sizeof(buf) - 4] = '.';
6543                 }
6544                 va_end(args);
6545                 die("%s", buf);
6546         }
6548         if (!status_empty || *msg) {
6549                 va_list args;
6551                 va_start(args, msg);
6553                 wmove(status_win, 0, 0);
6554                 if (view->has_scrolled && use_scroll_status_wclear)
6555                         wclear(status_win);
6556                 if (*msg) {
6557                         vwprintw(status_win, msg, args);
6558                         status_empty = FALSE;
6559                 } else {
6560                         status_empty = TRUE;
6561                 }
6562                 wclrtoeol(status_win);
6563                 wnoutrefresh(status_win);
6565                 va_end(args);
6566         }
6568         update_view_title(view);
6571 /* Controls when nodelay should be in effect when polling user input. */
6572 static void
6573 set_nonblocking_input(bool loading)
6575         static unsigned int loading_views;
6577         if ((loading == FALSE && loading_views-- == 1) ||
6578             (loading == TRUE  && loading_views++ == 0))
6579                 nodelay(status_win, loading);
6582 static void
6583 init_display(void)
6585         const char *term;
6586         int x, y;
6588         /* Initialize the curses library */
6589         if (isatty(STDIN_FILENO)) {
6590                 cursed = !!initscr();
6591                 opt_tty = stdin;
6592         } else {
6593                 /* Leave stdin and stdout alone when acting as a pager. */
6594                 opt_tty = fopen("/dev/tty", "r+");
6595                 if (!opt_tty)
6596                         die("Failed to open /dev/tty");
6597                 cursed = !!newterm(NULL, opt_tty, opt_tty);
6598         }
6600         if (!cursed)
6601                 die("Failed to initialize curses");
6603         nonl();         /* Disable conversion and detect newlines from input. */
6604         cbreak();       /* Take input chars one at a time, no wait for \n */
6605         noecho();       /* Don't echo input */
6606         leaveok(stdscr, FALSE);
6608         if (has_colors())
6609                 init_colors();
6611         getmaxyx(stdscr, y, x);
6612         status_win = newwin(1, 0, y - 1, 0);
6613         if (!status_win)
6614                 die("Failed to create status window");
6616         /* Enable keyboard mapping */
6617         keypad(status_win, TRUE);
6618         wbkgdset(status_win, get_line_attr(LINE_STATUS));
6620         TABSIZE = opt_tab_size;
6621         if (opt_line_graphics) {
6622                 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
6623         }
6625         term = getenv("XTERM_VERSION") ? NULL : getenv("COLORTERM");
6626         if (term && !strcmp(term, "gnome-terminal")) {
6627                 /* In the gnome-terminal-emulator, the message from
6628                  * scrolling up one line when impossible followed by
6629                  * scrolling down one line causes corruption of the
6630                  * status line. This is fixed by calling wclear. */
6631                 use_scroll_status_wclear = TRUE;
6632                 use_scroll_redrawwin = FALSE;
6634         } else if (term && !strcmp(term, "xrvt-xpm")) {
6635                 /* No problems with full optimizations in xrvt-(unicode)
6636                  * and aterm. */
6637                 use_scroll_status_wclear = use_scroll_redrawwin = FALSE;
6639         } else {
6640                 /* When scrolling in (u)xterm the last line in the
6641                  * scrolling direction will update slowly. */
6642                 use_scroll_redrawwin = TRUE;
6643                 use_scroll_status_wclear = FALSE;
6644         }
6647 static int
6648 get_input(int prompt_position)
6650         struct view *view;
6651         int i, key, cursor_y, cursor_x;
6653         if (prompt_position)
6654                 input_mode = TRUE;
6656         while (TRUE) {
6657                 foreach_view (view, i) {
6658                         update_view(view);
6659                         if (view_is_displayed(view) && view->has_scrolled &&
6660                             use_scroll_redrawwin)
6661                                 redrawwin(view->win);
6662                         view->has_scrolled = FALSE;
6663                 }
6665                 /* Update the cursor position. */
6666                 if (prompt_position) {
6667                         getbegyx(status_win, cursor_y, cursor_x);
6668                         cursor_x = prompt_position;
6669                 } else {
6670                         view = display[current_view];
6671                         getbegyx(view->win, cursor_y, cursor_x);
6672                         cursor_x = view->width - 1;
6673                         cursor_y += view->lineno - view->offset;
6674                 }
6675                 setsyx(cursor_y, cursor_x);
6677                 /* Refresh, accept single keystroke of input */
6678                 doupdate();
6679                 key = wgetch(status_win);
6681                 /* wgetch() with nodelay() enabled returns ERR when
6682                  * there's no input. */
6683                 if (key == ERR) {
6685                 } else if (key == KEY_RESIZE) {
6686                         int height, width;
6688                         getmaxyx(stdscr, height, width);
6690                         wresize(status_win, 1, width);
6691                         mvwin(status_win, height - 1, 0);
6692                         wnoutrefresh(status_win);
6693                         resize_display();
6694                         redraw_display(TRUE);
6696                 } else {
6697                         input_mode = FALSE;
6698                         return key;
6699                 }
6700         }
6703 static char *
6704 prompt_input(const char *prompt, input_handler handler, void *data)
6706         enum input_status status = INPUT_OK;
6707         static char buf[SIZEOF_STR];
6708         size_t pos = 0;
6710         buf[pos] = 0;
6712         while (status == INPUT_OK || status == INPUT_SKIP) {
6713                 int key;
6715                 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
6716                 wclrtoeol(status_win);
6718                 key = get_input(pos + 1);
6719                 switch (key) {
6720                 case KEY_RETURN:
6721                 case KEY_ENTER:
6722                 case '\n':
6723                         status = pos ? INPUT_STOP : INPUT_CANCEL;
6724                         break;
6726                 case KEY_BACKSPACE:
6727                         if (pos > 0)
6728                                 buf[--pos] = 0;
6729                         else
6730                                 status = INPUT_CANCEL;
6731                         break;
6733                 case KEY_ESC:
6734                         status = INPUT_CANCEL;
6735                         break;
6737                 default:
6738                         if (pos >= sizeof(buf)) {
6739                                 report("Input string too long");
6740                                 return NULL;
6741                         }
6743                         status = handler(data, buf, key);
6744                         if (status == INPUT_OK)
6745                                 buf[pos++] = (char) key;
6746                 }
6747         }
6749         /* Clear the status window */
6750         status_empty = FALSE;
6751         report("");
6753         if (status == INPUT_CANCEL)
6754                 return NULL;
6756         buf[pos++] = 0;
6758         return buf;
6761 static enum input_status
6762 prompt_yesno_handler(void *data, char *buf, int c)
6764         if (c == 'y' || c == 'Y')
6765                 return INPUT_STOP;
6766         if (c == 'n' || c == 'N')
6767                 return INPUT_CANCEL;
6768         return INPUT_SKIP;
6771 static bool
6772 prompt_yesno(const char *prompt)
6774         char prompt2[SIZEOF_STR];
6776         if (!string_format(prompt2, "%s [Yy/Nn]", prompt))
6777                 return FALSE;
6779         return !!prompt_input(prompt2, prompt_yesno_handler, NULL);
6782 static enum input_status
6783 read_prompt_handler(void *data, char *buf, int c)
6785         return isprint(c) ? INPUT_OK : INPUT_SKIP;
6788 static char *
6789 read_prompt(const char *prompt)
6791         return prompt_input(prompt, read_prompt_handler, NULL);
6794 /*
6795  * Repository properties
6796  */
6798 static struct ref **refs = NULL;
6799 static size_t refs_size = 0;
6801 static struct ref_list **ref_lists = NULL;
6802 static size_t ref_lists_size = 0;
6804 DEFINE_ALLOCATOR(realloc_refs, struct ref *, 256)
6805 DEFINE_ALLOCATOR(realloc_refs_list, struct ref *, 8)
6806 DEFINE_ALLOCATOR(realloc_ref_lists, struct ref_list *, 8)
6808 static int
6809 compare_refs(const void *ref1_, const void *ref2_)
6811         const struct ref *ref1 = *(const struct ref **)ref1_;
6812         const struct ref *ref2 = *(const struct ref **)ref2_;
6814         if (ref1->tag != ref2->tag)
6815                 return ref2->tag - ref1->tag;
6816         if (ref1->ltag != ref2->ltag)
6817                 return ref2->ltag - ref2->ltag;
6818         if (ref1->head != ref2->head)
6819                 return ref2->head - ref1->head;
6820         if (ref1->tracked != ref2->tracked)
6821                 return ref2->tracked - ref1->tracked;
6822         if (ref1->remote != ref2->remote)
6823                 return ref2->remote - ref1->remote;
6824         return strcmp(ref1->name, ref2->name);
6827 static void
6828 foreach_ref(bool (*visitor)(void *data, struct ref *ref), void *data)
6830         size_t i;
6832         for (i = 0; i < refs_size; i++)
6833                 if (!visitor(data, refs[i]))
6834                         break;
6837 static struct ref_list *
6838 get_ref_list(const char *id)
6840         struct ref_list *list;
6841         size_t i;
6843         for (i = 0; i < ref_lists_size; i++)
6844                 if (!strcmp(id, ref_lists[i]->id))
6845                         return ref_lists[i];
6847         if (!realloc_ref_lists(&ref_lists, ref_lists_size, 1))
6848                 return NULL;
6849         list = calloc(1, sizeof(*list));
6850         if (!list)
6851                 return NULL;
6853         for (i = 0; i < refs_size; i++) {
6854                 if (!strcmp(id, refs[i]->id) &&
6855                     realloc_refs_list(&list->refs, list->size, 1))
6856                         list->refs[list->size++] = refs[i];
6857         }
6859         if (!list->refs) {
6860                 free(list);
6861                 return NULL;
6862         }
6864         qsort(list->refs, list->size, sizeof(*list->refs), compare_refs);
6865         ref_lists[ref_lists_size++] = list;
6866         return list;
6869 static int
6870 read_ref(char *id, size_t idlen, char *name, size_t namelen)
6872         struct ref *ref = NULL;
6873         bool tag = FALSE;
6874         bool ltag = FALSE;
6875         bool remote = FALSE;
6876         bool tracked = FALSE;
6877         bool head = FALSE;
6878         int from = 0, to = refs_size - 1;
6880         if (!prefixcmp(name, "refs/tags/")) {
6881                 if (!suffixcmp(name, namelen, "^{}")) {
6882                         namelen -= 3;
6883                         name[namelen] = 0;
6884                 } else {
6885                         ltag = TRUE;
6886                 }
6888                 tag = TRUE;
6889                 namelen -= STRING_SIZE("refs/tags/");
6890                 name    += STRING_SIZE("refs/tags/");
6892         } else if (!prefixcmp(name, "refs/remotes/")) {
6893                 remote = TRUE;
6894                 namelen -= STRING_SIZE("refs/remotes/");
6895                 name    += STRING_SIZE("refs/remotes/");
6896                 tracked  = !strcmp(opt_remote, name);
6898         } else if (!prefixcmp(name, "refs/heads/")) {
6899                 namelen -= STRING_SIZE("refs/heads/");
6900                 name    += STRING_SIZE("refs/heads/");
6901                 head     = !strncmp(opt_head, name, namelen);
6903         } else if (!strcmp(name, "HEAD")) {
6904                 string_ncopy(opt_head_rev, id, idlen);
6905                 return OK;
6906         }
6908         /* If we are reloading or it's an annotated tag, replace the
6909          * previous SHA1 with the resolved commit id; relies on the fact
6910          * git-ls-remote lists the commit id of an annotated tag right
6911          * before the commit id it points to. */
6912         while (from <= to) {
6913                 size_t pos = (to + from) / 2;
6914                 int cmp = strcmp(name, refs[pos]->name);
6916                 if (!cmp) {
6917                         ref = refs[pos];
6918                         break;
6919                 }
6921                 if (cmp < 0)
6922                         to = pos - 1;
6923                 else
6924                         from = pos + 1;
6925         }
6927         if (!ref) {
6928                 if (!realloc_refs(&refs, refs_size, 1))
6929                         return ERR;
6930                 ref = calloc(1, sizeof(*ref) + namelen);
6931                 if (!ref)
6932                         return ERR;
6933                 memmove(refs + from + 1, refs + from,
6934                         (refs_size - from) * sizeof(*refs));
6935                 refs[from] = ref;
6936                 strncpy(ref->name, name, namelen);
6937                 refs_size++;
6938         }
6940         ref->head = head;
6941         ref->tag = tag;
6942         ref->ltag = ltag;
6943         ref->remote = remote;
6944         ref->tracked = tracked;
6945         string_copy_rev(ref->id, id);
6947         return OK;
6950 static int
6951 load_refs(void)
6953         const char *head_argv[] = {
6954                 "git", "symbolic-ref", "HEAD", NULL
6955         };
6956         static const char *ls_remote_argv[SIZEOF_ARG] = {
6957                 "git", "ls-remote", opt_git_dir, NULL
6958         };
6959         static bool init = FALSE;
6960         size_t i;
6962         if (!init) {
6963                 argv_from_env(ls_remote_argv, "TIG_LS_REMOTE");
6964                 init = TRUE;
6965         }
6967         if (!*opt_git_dir)
6968                 return OK;
6970         if (run_io_buf(head_argv, opt_head, sizeof(opt_head)) &&
6971             !prefixcmp(opt_head, "refs/heads/")) {
6972                 char *offset = opt_head + STRING_SIZE("refs/heads/");
6974                 memmove(opt_head, offset, strlen(offset) + 1);
6975         }
6977         for (i = 0; i < refs_size; i++)
6978                 refs[i]->id[0] = 0;
6980         if (run_io_load(ls_remote_argv, "\t", read_ref) == ERR)
6981                 return ERR;
6983         /* Update the ref lists to reflect changes. */
6984         for (i = 0; i < ref_lists_size; i++) {
6985                 struct ref_list *list = ref_lists[i];
6986                 size_t old, new;
6988                 for (old = new = 0; old < list->size; old++)
6989                         if (!strcmp(list->id, list->refs[old]->id))
6990                                 list->refs[new++] = list->refs[old];
6991                 list->size = new;
6992         }
6994         return OK;
6997 static void
6998 set_remote_branch(const char *name, const char *value, size_t valuelen)
7000         if (!strcmp(name, ".remote")) {
7001                 string_ncopy(opt_remote, value, valuelen);
7003         } else if (*opt_remote && !strcmp(name, ".merge")) {
7004                 size_t from = strlen(opt_remote);
7006                 if (!prefixcmp(value, "refs/heads/"))
7007                         value += STRING_SIZE("refs/heads/");
7009                 if (!string_format_from(opt_remote, &from, "/%s", value))
7010                         opt_remote[0] = 0;
7011         }
7014 static void
7015 set_repo_config_option(char *name, char *value, int (*cmd)(int, const char **))
7017         const char *argv[SIZEOF_ARG] = { name, "=" };
7018         int argc = 1 + (cmd == option_set_command);
7019         int error = ERR;
7021         if (!argv_from_string(argv, &argc, value))
7022                 config_msg = "Too many option arguments";
7023         else
7024                 error = cmd(argc, argv);
7026         if (error == ERR)
7027                 warn("Option 'tig.%s': %s", name, config_msg);
7030 static bool
7031 set_environment_variable(const char *name, const char *value)
7033         size_t len = strlen(name) + 1 + strlen(value) + 1;
7034         char *env = malloc(len);
7036         if (env &&
7037             string_nformat(env, len, NULL, "%s=%s", name, value) &&
7038             putenv(env) == 0)
7039                 return TRUE;
7040         free(env);
7041         return FALSE;
7044 static void
7045 set_work_tree(const char *value)
7047         char cwd[SIZEOF_STR];
7049         if (!getcwd(cwd, sizeof(cwd)))
7050                 die("Failed to get cwd path: %s", strerror(errno));
7051         if (chdir(opt_git_dir) < 0)
7052                 die("Failed to chdir(%s): %s", strerror(errno));
7053         if (!getcwd(opt_git_dir, sizeof(opt_git_dir)))
7054                 die("Failed to get git path: %s", strerror(errno));
7055         if (chdir(cwd) < 0)
7056                 die("Failed to chdir(%s): %s", cwd, strerror(errno));
7057         if (chdir(value) < 0)
7058                 die("Failed to chdir(%s): %s", value, strerror(errno));
7059         if (!getcwd(cwd, sizeof(cwd)))
7060                 die("Failed to get cwd path: %s", strerror(errno));
7061         if (!set_environment_variable("GIT_WORK_TREE", cwd))
7062                 die("Failed to set GIT_WORK_TREE to '%s'", cwd);
7063         if (!set_environment_variable("GIT_DIR", opt_git_dir))
7064                 die("Failed to set GIT_DIR to '%s'", opt_git_dir);
7065         opt_is_inside_work_tree = TRUE;
7068 static int
7069 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
7071         if (!strcmp(name, "i18n.commitencoding"))
7072                 string_ncopy(opt_encoding, value, valuelen);
7074         else if (!strcmp(name, "core.editor"))
7075                 string_ncopy(opt_editor, value, valuelen);
7077         else if (!strcmp(name, "core.worktree"))
7078                 set_work_tree(value);
7080         else if (!prefixcmp(name, "tig.color."))
7081                 set_repo_config_option(name + 10, value, option_color_command);
7083         else if (!prefixcmp(name, "tig.bind."))
7084                 set_repo_config_option(name + 9, value, option_bind_command);
7086         else if (!prefixcmp(name, "tig."))
7087                 set_repo_config_option(name + 4, value, option_set_command);
7089         else if (*opt_head && !prefixcmp(name, "branch.") &&
7090                  !strncmp(name + 7, opt_head, strlen(opt_head)))
7091                 set_remote_branch(name + 7 + strlen(opt_head), value, valuelen);
7093         return OK;
7096 static int
7097 load_git_config(void)
7099         const char *config_list_argv[] = { "git", GIT_CONFIG, "--list", NULL };
7101         return run_io_load(config_list_argv, "=", read_repo_config_option);
7104 static int
7105 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
7107         if (!opt_git_dir[0]) {
7108                 string_ncopy(opt_git_dir, name, namelen);
7110         } else if (opt_is_inside_work_tree == -1) {
7111                 /* This can be 3 different values depending on the
7112                  * version of git being used. If git-rev-parse does not
7113                  * understand --is-inside-work-tree it will simply echo
7114                  * the option else either "true" or "false" is printed.
7115                  * Default to true for the unknown case. */
7116                 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
7118         } else if (*name == '.') {
7119                 string_ncopy(opt_cdup, name, namelen);
7121         } else {
7122                 string_ncopy(opt_prefix, name, namelen);
7123         }
7125         return OK;
7128 static int
7129 load_repo_info(void)
7131         const char *rev_parse_argv[] = {
7132                 "git", "rev-parse", "--git-dir", "--is-inside-work-tree",
7133                         "--show-cdup", "--show-prefix", NULL
7134         };
7136         return run_io_load(rev_parse_argv, "=", read_repo_info);
7140 /*
7141  * Main
7142  */
7144 static const char usage[] =
7145 "tig " TIG_VERSION " (" __DATE__ ")\n"
7146 "\n"
7147 "Usage: tig        [options] [revs] [--] [paths]\n"
7148 "   or: tig show   [options] [revs] [--] [paths]\n"
7149 "   or: tig blame  [rev] path\n"
7150 "   or: tig status\n"
7151 "   or: tig <      [git command output]\n"
7152 "\n"
7153 "Options:\n"
7154 "  -v, --version   Show version and exit\n"
7155 "  -h, --help      Show help message and exit";
7157 static void __NORETURN
7158 quit(int sig)
7160         /* XXX: Restore tty modes and let the OS cleanup the rest! */
7161         if (cursed)
7162                 endwin();
7163         exit(0);
7166 static void __NORETURN
7167 die(const char *err, ...)
7169         va_list args;
7171         endwin();
7173         va_start(args, err);
7174         fputs("tig: ", stderr);
7175         vfprintf(stderr, err, args);
7176         fputs("\n", stderr);
7177         va_end(args);
7179         exit(1);
7182 static void
7183 warn(const char *msg, ...)
7185         va_list args;
7187         va_start(args, msg);
7188         fputs("tig warning: ", stderr);
7189         vfprintf(stderr, msg, args);
7190         fputs("\n", stderr);
7191         va_end(args);
7194 static enum request
7195 parse_options(int argc, const char *argv[])
7197         enum request request = REQ_VIEW_MAIN;
7198         const char *subcommand;
7199         bool seen_dashdash = FALSE;
7200         /* XXX: This is vulnerable to the user overriding options
7201          * required for the main view parser. */
7202         const char *custom_argv[SIZEOF_ARG] = {
7203                 "git", "log", "--no-color", "--pretty=raw", "--parents",
7204                         "--topo-order", NULL
7205         };
7206         int i, j = 6;
7208         if (!isatty(STDIN_FILENO)) {
7209                 io_open(&VIEW(REQ_VIEW_PAGER)->io, "");
7210                 return REQ_VIEW_PAGER;
7211         }
7213         if (argc <= 1)
7214                 return REQ_NONE;
7216         subcommand = argv[1];
7217         if (!strcmp(subcommand, "status")) {
7218                 if (argc > 2)
7219                         warn("ignoring arguments after `%s'", subcommand);
7220                 return REQ_VIEW_STATUS;
7222         } else if (!strcmp(subcommand, "blame")) {
7223                 if (argc <= 2 || argc > 4)
7224                         die("invalid number of options to blame\n\n%s", usage);
7226                 i = 2;
7227                 if (argc == 4) {
7228                         string_ncopy(opt_ref, argv[i], strlen(argv[i]));
7229                         i++;
7230                 }
7232                 string_ncopy(opt_file, argv[i], strlen(argv[i]));
7233                 return REQ_VIEW_BLAME;
7235         } else if (!strcmp(subcommand, "show")) {
7236                 request = REQ_VIEW_DIFF;
7238         } else {
7239                 subcommand = NULL;
7240         }
7242         if (subcommand) {
7243                 custom_argv[1] = subcommand;
7244                 j = 2;
7245         }
7247         for (i = 1 + !!subcommand; i < argc; i++) {
7248                 const char *opt = argv[i];
7250                 if (seen_dashdash || !strcmp(opt, "--")) {
7251                         seen_dashdash = TRUE;
7253                 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
7254                         printf("tig version %s\n", TIG_VERSION);
7255                         quit(0);
7257                 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
7258                         printf("%s\n", usage);
7259                         quit(0);
7260                 }
7262                 custom_argv[j++] = opt;
7263                 if (j >= ARRAY_SIZE(custom_argv))
7264                         die("command too long");
7265         }
7267         if (!prepare_update(VIEW(request), custom_argv, NULL, FORMAT_NONE))                                                                        
7268                 die("Failed to format arguments"); 
7270         return request;
7273 int
7274 main(int argc, const char *argv[])
7276         enum request request = parse_options(argc, argv);
7277         struct view *view;
7278         size_t i;
7280         signal(SIGINT, quit);
7281         signal(SIGPIPE, SIG_IGN);
7283         if (setlocale(LC_ALL, "")) {
7284                 char *codeset = nl_langinfo(CODESET);
7286                 string_ncopy(opt_codeset, codeset, strlen(codeset));
7287         }
7289         if (load_repo_info() == ERR)
7290                 die("Failed to load repo info.");
7292         if (load_options() == ERR)
7293                 die("Failed to load user config.");
7295         if (load_git_config() == ERR)
7296                 die("Failed to load repo config.");
7298         /* Require a git repository unless when running in pager mode. */
7299         if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
7300                 die("Not a git repository");
7302         if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
7303                 opt_utf8 = FALSE;
7305         if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
7306                 opt_iconv = iconv_open(opt_codeset, opt_encoding);
7307                 if (opt_iconv == ICONV_NONE)
7308                         die("Failed to initialize character set conversion");
7309         }
7311         if (load_refs() == ERR)
7312                 die("Failed to load refs.");
7314         foreach_view (view, i)
7315                 argv_from_env(view->ops->argv, view->cmd_env);
7317         init_display();
7319         if (request != REQ_NONE)
7320                 open_view(NULL, request, OPEN_PREPARED);
7321         request = request == REQ_NONE ? REQ_VIEW_MAIN : REQ_NONE;
7323         while (view_driver(display[current_view], request)) {
7324                 int key = get_input(0);
7326                 view = display[current_view];
7327                 request = get_keybinding(view->keymap, key);
7329                 /* Some low-level request handling. This keeps access to
7330                  * status_win restricted. */
7331                 switch (request) {
7332                 case REQ_PROMPT:
7333                 {
7334                         char *cmd = read_prompt(":");
7336                         if (cmd && isdigit(*cmd)) {
7337                                 int lineno = view->lineno + 1;
7339                                 if (parse_int(&lineno, cmd, 1, view->lines + 1) == OK) {
7340                                         select_view_line(view, lineno - 1);
7341                                         report("");
7342                                 } else {
7343                                         report("Unable to parse '%s' as a line number", cmd);
7344                                 }
7346                         } else if (cmd) {
7347                                 struct view *next = VIEW(REQ_VIEW_PAGER);
7348                                 const char *argv[SIZEOF_ARG] = { "git" };
7349                                 int argc = 1;
7351                                 /* When running random commands, initially show the
7352                                  * command in the title. However, it maybe later be
7353                                  * overwritten if a commit line is selected. */
7354                                 string_ncopy(next->ref, cmd, strlen(cmd));
7356                                 if (!argv_from_string(argv, &argc, cmd)) {
7357                                         report("Too many arguments");
7358                                 } else if (!prepare_update(next, argv, NULL, FORMAT_DASH)) {
7359                                         report("Failed to format command");
7360                                 } else {
7361                                         open_view(view, REQ_VIEW_PAGER, OPEN_PREPARED);
7362                                 }
7363                         }
7365                         request = REQ_NONE;
7366                         break;
7367                 }
7368                 case REQ_SEARCH:
7369                 case REQ_SEARCH_BACK:
7370                 {
7371                         const char *prompt = request == REQ_SEARCH ? "/" : "?";
7372                         char *search = read_prompt(prompt);
7374                         if (search)
7375                                 string_ncopy(opt_search, search, strlen(search));
7376                         else if (*opt_search)
7377                                 request = request == REQ_SEARCH ?
7378                                         REQ_FIND_NEXT :
7379                                         REQ_FIND_PREV;
7380                         else
7381                                 request = REQ_NONE;
7382                         break;
7383                 }
7384                 default:
7385                         break;
7386                 }
7387         }
7389         quit(0);
7391         return 0;