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[tig] / tig.c
1 /* Copyright (c) 2006-2007 Jonas Fonseca <fonseca@diku.dk>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
17
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
21
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
25
26 #include <assert.h>
27 #include <errno.h>
28 #include <ctype.h>
29 #include <signal.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <unistd.h>
37 #include <time.h>
38
39 #include <regex.h>
40
41 #include <locale.h>
42 #include <langinfo.h>
43 #include <iconv.h>
44
45 #include <curses.h>
46
47 #if __GNUC__ >= 3
48 #define __NORETURN __attribute__((__noreturn__))
49 #else
50 #define __NORETURN
51 #endif
52
53 static void __NORETURN die(const char *err, ...);
54 static void report(const char *msg, ...);
55 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, size_t, char *, size_t));
56 static void set_nonblocking_input(bool loading);
57 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
58
59 #define ABS(x) ((x) >= 0 ? (x) : -(x))
60 #define MIN(x, y) ((x) < (y) ? (x) : (y))
61
62 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
63 #define STRING_SIZE(x) (sizeof(x) - 1)
64
65 #define SIZEOF_STR 1024 /* Default string size. */
66 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
67 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
68
69 /* Revision graph */
70
71 #define REVGRAPH_INIT 'I'
72 #define REVGRAPH_MERGE 'M'
73 #define REVGRAPH_BRANCH '+'
74 #define REVGRAPH_COMMIT '*'
75 #define REVGRAPH_LINE '|'
76
77 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
78
79 /* This color name can be used to refer to the default term colors. */
80 #define COLOR_DEFAULT (-1)
81
82 #define ICONV_NONE ((iconv_t) -1)
83 #ifndef ICONV_CONST
84 #define ICONV_CONST /* nothing */
85 #endif
86
87 /* The format and size of the date column in the main view. */
88 #define DATE_FORMAT "%Y-%m-%d %H:%M"
89 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
90
91 #define AUTHOR_COLS 20
92
93 /* The default interval between line numbers. */
94 #define NUMBER_INTERVAL 1
95
96 #define TABSIZE 8
97
98 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
99
100 #ifndef GIT_CONFIG
101 #define GIT_CONFIG "git config"
102 #endif
103
104 #define TIG_LS_REMOTE \
105 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
106
107 #define TIG_DIFF_CMD \
108 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
109
110 #define TIG_LOG_CMD \
111 "git log --cc --stat -n100 %s 2>/dev/null"
112
113 #define TIG_MAIN_CMD \
114 "git log --topo-order --pretty=raw %s 2>/dev/null"
115
116 #define TIG_TREE_CMD \
117 "git ls-tree %s %s"
118
119 #define TIG_BLOB_CMD \
120 "git cat-file blob %s"
121
122 /* XXX: Needs to be defined to the empty string. */
123 #define TIG_HELP_CMD ""
124 #define TIG_PAGER_CMD ""
125 #define TIG_STATUS_CMD ""
126 #define TIG_STAGE_CMD ""
127
128 /* Some ascii-shorthands fitted into the ncurses namespace. */
129 #define KEY_TAB '\t'
130 #define KEY_RETURN '\r'
131 #define KEY_ESC 27
132
133
134 struct ref {
135 char *name; /* Ref name; tag or head names are shortened. */
136 char id[SIZEOF_REV]; /* Commit SHA1 ID */
137 unsigned int tag:1; /* Is it a tag? */
138 unsigned int remote:1; /* Is it a remote ref? */
139 unsigned int next:1; /* For ref lists: are there more refs? */
140 };
141
142 static struct ref **get_refs(char *id);
143
144 struct int_map {
145 const char *name;
146 int namelen;
147 int value;
148 };
149
150 static int
151 set_from_int_map(struct int_map *map, size_t map_size,
152 int *value, const char *name, int namelen)
153 {
154
155 int i;
156
157 for (i = 0; i < map_size; i++)
158 if (namelen == map[i].namelen &&
159 !strncasecmp(name, map[i].name, namelen)) {
160 *value = map[i].value;
161 return OK;
162 }
163
164 return ERR;
165 }
166
167
168 /*
169 * String helpers
170 */
171
172 static inline void
173 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
174 {
175 if (srclen > dstlen - 1)
176 srclen = dstlen - 1;
177
178 strncpy(dst, src, srclen);
179 dst[srclen] = 0;
180 }
181
182 /* Shorthands for safely copying into a fixed buffer. */
183
184 #define string_copy(dst, src) \
185 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
186
187 #define string_ncopy(dst, src, srclen) \
188 string_ncopy_do(dst, sizeof(dst), src, srclen)
189
190 #define string_copy_rev(dst, src) \
191 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
192
193 #define string_add(dst, from, src) \
194 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
195
196 static char *
197 chomp_string(char *name)
198 {
199 int namelen;
200
201 while (isspace(*name))
202 name++;
203
204 namelen = strlen(name) - 1;
205 while (namelen > 0 && isspace(name[namelen]))
206 name[namelen--] = 0;
207
208 return name;
209 }
210
211 static bool
212 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
213 {
214 va_list args;
215 size_t pos = bufpos ? *bufpos : 0;
216
217 va_start(args, fmt);
218 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
219 va_end(args);
220
221 if (bufpos)
222 *bufpos = pos;
223
224 return pos >= bufsize ? FALSE : TRUE;
225 }
226
227 #define string_format(buf, fmt, args...) \
228 string_nformat(buf, sizeof(buf), NULL, fmt, args)
229
230 #define string_format_from(buf, from, fmt, args...) \
231 string_nformat(buf, sizeof(buf), from, fmt, args)
232
233 static int
234 string_enum_compare(const char *str1, const char *str2, int len)
235 {
236 size_t i;
237
238 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
239
240 /* Diff-Header == DIFF_HEADER */
241 for (i = 0; i < len; i++) {
242 if (toupper(str1[i]) == toupper(str2[i]))
243 continue;
244
245 if (string_enum_sep(str1[i]) &&
246 string_enum_sep(str2[i]))
247 continue;
248
249 return str1[i] - str2[i];
250 }
251
252 return 0;
253 }
254
255 /* Shell quoting
256 *
257 * NOTE: The following is a slightly modified copy of the git project's shell
258 * quoting routines found in the quote.c file.
259 *
260 * Help to copy the thing properly quoted for the shell safety. any single
261 * quote is replaced with '\'', any exclamation point is replaced with '\!',
262 * and the whole thing is enclosed in a
263 *
264 * E.g.
265 * original sq_quote result
266 * name ==> name ==> 'name'
267 * a b ==> a b ==> 'a b'
268 * a'b ==> a'\''b ==> 'a'\''b'
269 * a!b ==> a'\!'b ==> 'a'\!'b'
270 */
271
272 static size_t
273 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
274 {
275 char c;
276
277 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
278
279 BUFPUT('\'');
280 while ((c = *src++)) {
281 if (c == '\'' || c == '!') {
282 BUFPUT('\'');
283 BUFPUT('\\');
284 BUFPUT(c);
285 BUFPUT('\'');
286 } else {
287 BUFPUT(c);
288 }
289 }
290 BUFPUT('\'');
291
292 if (bufsize < SIZEOF_STR)
293 buf[bufsize] = 0;
294
295 return bufsize;
296 }
297
298
299 /*
300 * User requests
301 */
302
303 #define REQ_INFO \
304 /* XXX: Keep the view request first and in sync with views[]. */ \
305 REQ_GROUP("View switching") \
306 REQ_(VIEW_MAIN, "Show main view"), \
307 REQ_(VIEW_DIFF, "Show diff view"), \
308 REQ_(VIEW_LOG, "Show log view"), \
309 REQ_(VIEW_TREE, "Show tree view"), \
310 REQ_(VIEW_BLOB, "Show blob view"), \
311 REQ_(VIEW_HELP, "Show help page"), \
312 REQ_(VIEW_PAGER, "Show pager view"), \
313 REQ_(VIEW_STATUS, "Show status view"), \
314 REQ_(VIEW_STAGE, "Show stage view"), \
315 \
316 REQ_GROUP("View manipulation") \
317 REQ_(ENTER, "Enter current line and scroll"), \
318 REQ_(NEXT, "Move to next"), \
319 REQ_(PREVIOUS, "Move to previous"), \
320 REQ_(VIEW_NEXT, "Move focus to next view"), \
321 REQ_(VIEW_CLOSE, "Close the current view"), \
322 REQ_(QUIT, "Close all views and quit"), \
323 \
324 REQ_GROUP("Cursor navigation") \
325 REQ_(MOVE_UP, "Move cursor one line up"), \
326 REQ_(MOVE_DOWN, "Move cursor one line down"), \
327 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
328 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
329 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
330 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
331 \
332 REQ_GROUP("Scrolling") \
333 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
334 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
335 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
336 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
337 \
338 REQ_GROUP("Searching") \
339 REQ_(SEARCH, "Search the view"), \
340 REQ_(SEARCH_BACK, "Search backwards in the view"), \
341 REQ_(FIND_NEXT, "Find next search match"), \
342 REQ_(FIND_PREV, "Find previous search match"), \
343 \
344 REQ_GROUP("Misc") \
345 REQ_(NONE, "Do nothing"), \
346 REQ_(PROMPT, "Bring up the prompt"), \
347 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
348 REQ_(SCREEN_RESIZE, "Resize the screen"), \
349 REQ_(SHOW_VERSION, "Show version information"), \
350 REQ_(STOP_LOADING, "Stop all loading views"), \
351 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
352 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
353 REQ_(STATUS_UPDATE, "Update file status"), \
354 REQ_(EDIT, "Open in editor"), \
355 REQ_(CHERRY_PICK, "Cherry-pick commit to current branch")
356
357
358 /* User action requests. */
359 enum request {
360 #define REQ_GROUP(help)
361 #define REQ_(req, help) REQ_##req
362
363 /* Offset all requests to avoid conflicts with ncurses getch values. */
364 REQ_OFFSET = KEY_MAX + 1,
365 REQ_INFO,
366 REQ_UNKNOWN,
367
368 #undef REQ_GROUP
369 #undef REQ_
370 };
371
372 struct request_info {
373 enum request request;
374 char *name;
375 int namelen;
376 char *help;
377 };
378
379 static struct request_info req_info[] = {
380 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
381 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
382 REQ_INFO
383 #undef REQ_GROUP
384 #undef REQ_
385 };
386
387 static enum request
388 get_request(const char *name)
389 {
390 int namelen = strlen(name);
391 int i;
392
393 for (i = 0; i < ARRAY_SIZE(req_info); i++)
394 if (req_info[i].namelen == namelen &&
395 !string_enum_compare(req_info[i].name, name, namelen))
396 return req_info[i].request;
397
398 return REQ_UNKNOWN;
399 }
400
401
402 /*
403 * Options
404 */
405
406 static const char usage[] =
407 "tig " TIG_VERSION " (" __DATE__ ")\n"
408 "\n"
409 "Usage: tig [options]\n"
410 " or: tig [options] [--] [git log options]\n"
411 " or: tig [options] log [git log options]\n"
412 " or: tig [options] diff [git diff options]\n"
413 " or: tig [options] show [git show options]\n"
414 " or: tig [options] < [git command output]\n"
415 "\n"
416 "Options:\n"
417 " -l Start up in log view\n"
418 " -d Start up in diff view\n"
419 " -S Start up in status view\n"
420 " -n[I], --line-number[=I] Show line numbers with given interval\n"
421 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
422 " -- Mark end of tig options\n"
423 " -v, --version Show version and exit\n"
424 " -h, --help Show help message and exit\n";
425
426 /* Option and state variables. */
427 static bool opt_line_number = FALSE;
428 static bool opt_rev_graph = FALSE;
429 static int opt_num_interval = NUMBER_INTERVAL;
430 static int opt_tab_size = TABSIZE;
431 static enum request opt_request = REQ_VIEW_MAIN;
432 static char opt_cmd[SIZEOF_STR] = "";
433 static char opt_path[SIZEOF_STR] = "";
434 static FILE *opt_pipe = NULL;
435 static char opt_encoding[20] = "UTF-8";
436 static bool opt_utf8 = TRUE;
437 static char opt_codeset[20] = "UTF-8";
438 static iconv_t opt_iconv = ICONV_NONE;
439 static char opt_search[SIZEOF_STR] = "";
440 static char opt_cdup[SIZEOF_STR] = "";
441 static char opt_git_dir[SIZEOF_STR] = "";
442 static char opt_editor[SIZEOF_STR] = "";
443
444 enum option_type {
445 OPT_NONE,
446 OPT_INT,
447 };
448
449 static bool
450 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
451 {
452 va_list args;
453 char *value = "";
454 int *number;
455
456 if (opt[0] != '-')
457 return FALSE;
458
459 if (opt[1] == '-') {
460 int namelen = strlen(name);
461
462 opt += 2;
463
464 if (strncmp(opt, name, namelen))
465 return FALSE;
466
467 if (opt[namelen] == '=')
468 value = opt + namelen + 1;
469
470 } else {
471 if (!short_name || opt[1] != short_name)
472 return FALSE;
473 value = opt + 2;
474 }
475
476 va_start(args, type);
477 if (type == OPT_INT) {
478 number = va_arg(args, int *);
479 if (isdigit(*value))
480 *number = atoi(value);
481 }
482 va_end(args);
483
484 return TRUE;
485 }
486
487 /* Returns the index of log or diff command or -1 to exit. */
488 static bool
489 parse_options(int argc, char *argv[])
490 {
491 int i;
492
493 for (i = 1; i < argc; i++) {
494 char *opt = argv[i];
495
496 if (!strcmp(opt, "log") ||
497 !strcmp(opt, "diff") ||
498 !strcmp(opt, "show")) {
499 opt_request = opt[0] == 'l'
500 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
501 break;
502 }
503
504 if (opt[0] && opt[0] != '-')
505 break;
506
507 if (!strcmp(opt, "-l")) {
508 opt_request = REQ_VIEW_LOG;
509 continue;
510 }
511
512 if (!strcmp(opt, "-d")) {
513 opt_request = REQ_VIEW_DIFF;
514 continue;
515 }
516
517 if (!strcmp(opt, "-S")) {
518 opt_request = REQ_VIEW_STATUS;
519 continue;
520 }
521
522 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
523 opt_line_number = TRUE;
524 continue;
525 }
526
527 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
528 opt_tab_size = MIN(opt_tab_size, TABSIZE);
529 continue;
530 }
531
532 if (check_option(opt, 'v', "version", OPT_NONE)) {
533 printf("tig version %s\n", TIG_VERSION);
534 return FALSE;
535 }
536
537 if (check_option(opt, 'h', "help", OPT_NONE)) {
538 printf(usage);
539 return FALSE;
540 }
541
542 if (!strcmp(opt, "--")) {
543 i++;
544 break;
545 }
546
547 die("unknown option '%s'\n\n%s", opt, usage);
548 }
549
550 if (!isatty(STDIN_FILENO)) {
551 opt_request = REQ_VIEW_PAGER;
552 opt_pipe = stdin;
553
554 } else if (i < argc) {
555 size_t buf_size;
556
557 if (opt_request == REQ_VIEW_MAIN)
558 /* XXX: This is vulnerable to the user overriding
559 * options required for the main view parser. */
560 string_copy(opt_cmd, "git log --pretty=raw");
561 else
562 string_copy(opt_cmd, "git");
563 buf_size = strlen(opt_cmd);
564
565 while (buf_size < sizeof(opt_cmd) && i < argc) {
566 opt_cmd[buf_size++] = ' ';
567 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
568 }
569
570 if (buf_size >= sizeof(opt_cmd))
571 die("command too long");
572
573 opt_cmd[buf_size] = 0;
574 }
575
576 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
577 opt_utf8 = FALSE;
578
579 return TRUE;
580 }
581
582
583 /*
584 * Line-oriented content detection.
585 */
586
587 #define LINE_INFO \
588 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
589 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
590 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
591 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
592 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
593 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
594 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
595 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
596 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
597 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
598 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
599 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
600 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
601 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
602 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
603 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
604 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
605 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
606 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
607 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
608 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
609 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
610 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
611 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
612 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
613 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
614 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
615 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
616 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
617 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
618 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
619 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
620 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
621 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
622 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
623 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
624 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
625 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
626 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
627 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
628 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
629 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
630 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
631 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
632 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
633 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
634 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0)
635
636 enum line_type {
637 #define LINE(type, line, fg, bg, attr) \
638 LINE_##type
639 LINE_INFO
640 #undef LINE
641 };
642
643 struct line_info {
644 const char *name; /* Option name. */
645 int namelen; /* Size of option name. */
646 const char *line; /* The start of line to match. */
647 int linelen; /* Size of string to match. */
648 int fg, bg, attr; /* Color and text attributes for the lines. */
649 };
650
651 static struct line_info line_info[] = {
652 #define LINE(type, line, fg, bg, attr) \
653 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
654 LINE_INFO
655 #undef LINE
656 };
657
658 static enum line_type
659 get_line_type(char *line)
660 {
661 int linelen = strlen(line);
662 enum line_type type;
663
664 for (type = 0; type < ARRAY_SIZE(line_info); type++)
665 /* Case insensitive search matches Signed-off-by lines better. */
666 if (linelen >= line_info[type].linelen &&
667 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
668 return type;
669
670 return LINE_DEFAULT;
671 }
672
673 static inline int
674 get_line_attr(enum line_type type)
675 {
676 assert(type < ARRAY_SIZE(line_info));
677 return COLOR_PAIR(type) | line_info[type].attr;
678 }
679
680 static struct line_info *
681 get_line_info(char *name, int namelen)
682 {
683 enum line_type type;
684
685 for (type = 0; type < ARRAY_SIZE(line_info); type++)
686 if (namelen == line_info[type].namelen &&
687 !string_enum_compare(line_info[type].name, name, namelen))
688 return &line_info[type];
689
690 return NULL;
691 }
692
693 static void
694 init_colors(void)
695 {
696 int default_bg = COLOR_BLACK;
697 int default_fg = COLOR_WHITE;
698 enum line_type type;
699
700 start_color();
701
702 if (use_default_colors() != ERR) {
703 default_bg = -1;
704 default_fg = -1;
705 }
706
707 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
708 struct line_info *info = &line_info[type];
709 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
710 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
711
712 init_pair(type, fg, bg);
713 }
714 }
715
716 struct line {
717 enum line_type type;
718
719 /* State flags */
720 unsigned int selected:1;
721
722 void *data; /* User data */
723 };
724
725
726 /*
727 * Keys
728 */
729
730 struct keybinding {
731 int alias;
732 enum request request;
733 struct keybinding *next;
734 };
735
736 static struct keybinding default_keybindings[] = {
737 /* View switching */
738 { 'm', REQ_VIEW_MAIN },
739 { 'd', REQ_VIEW_DIFF },
740 { 'l', REQ_VIEW_LOG },
741 { 't', REQ_VIEW_TREE },
742 { 'f', REQ_VIEW_BLOB },
743 { 'p', REQ_VIEW_PAGER },
744 { 'h', REQ_VIEW_HELP },
745 { 'S', REQ_VIEW_STATUS },
746 { 'c', REQ_VIEW_STAGE },
747
748 /* View manipulation */
749 { 'q', REQ_VIEW_CLOSE },
750 { KEY_TAB, REQ_VIEW_NEXT },
751 { KEY_RETURN, REQ_ENTER },
752 { KEY_UP, REQ_PREVIOUS },
753 { KEY_DOWN, REQ_NEXT },
754
755 /* Cursor navigation */
756 { 'k', REQ_MOVE_UP },
757 { 'j', REQ_MOVE_DOWN },
758 { KEY_HOME, REQ_MOVE_FIRST_LINE },
759 { KEY_END, REQ_MOVE_LAST_LINE },
760 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
761 { ' ', REQ_MOVE_PAGE_DOWN },
762 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
763 { 'b', REQ_MOVE_PAGE_UP },
764 { '-', REQ_MOVE_PAGE_UP },
765
766 /* Scrolling */
767 { KEY_IC, REQ_SCROLL_LINE_UP },
768 { KEY_DC, REQ_SCROLL_LINE_DOWN },
769 { 'w', REQ_SCROLL_PAGE_UP },
770 { 's', REQ_SCROLL_PAGE_DOWN },
771
772 /* Searching */
773 { '/', REQ_SEARCH },
774 { '?', REQ_SEARCH_BACK },
775 { 'n', REQ_FIND_NEXT },
776 { 'N', REQ_FIND_PREV },
777
778 /* Misc */
779 { 'Q', REQ_QUIT },
780 { 'z', REQ_STOP_LOADING },
781 { 'v', REQ_SHOW_VERSION },
782 { 'r', REQ_SCREEN_REDRAW },
783 { '.', REQ_TOGGLE_LINENO },
784 { 'g', REQ_TOGGLE_REV_GRAPH },
785 { ':', REQ_PROMPT },
786 { 'u', REQ_STATUS_UPDATE },
787 { 'e', REQ_EDIT },
788 { 'C', REQ_CHERRY_PICK },
789
790 /* Using the ncurses SIGWINCH handler. */
791 { KEY_RESIZE, REQ_SCREEN_RESIZE },
792 };
793
794 #define KEYMAP_INFO \
795 KEYMAP_(GENERIC), \
796 KEYMAP_(MAIN), \
797 KEYMAP_(DIFF), \
798 KEYMAP_(LOG), \
799 KEYMAP_(TREE), \
800 KEYMAP_(BLOB), \
801 KEYMAP_(PAGER), \
802 KEYMAP_(HELP), \
803 KEYMAP_(STATUS), \
804 KEYMAP_(STAGE)
805
806 enum keymap {
807 #define KEYMAP_(name) KEYMAP_##name
808 KEYMAP_INFO
809 #undef KEYMAP_
810 };
811
812 static struct int_map keymap_table[] = {
813 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
814 KEYMAP_INFO
815 #undef KEYMAP_
816 };
817
818 #define set_keymap(map, name) \
819 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
820
821 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
822
823 static void
824 add_keybinding(enum keymap keymap, enum request request, int key)
825 {
826 struct keybinding *keybinding;
827
828 keybinding = calloc(1, sizeof(*keybinding));
829 if (!keybinding)
830 die("Failed to allocate keybinding");
831
832 keybinding->alias = key;
833 keybinding->request = request;
834 keybinding->next = keybindings[keymap];
835 keybindings[keymap] = keybinding;
836 }
837
838 /* Looks for a key binding first in the given map, then in the generic map, and
839 * lastly in the default keybindings. */
840 static enum request
841 get_keybinding(enum keymap keymap, int key)
842 {
843 struct keybinding *kbd;
844 int i;
845
846 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
847 if (kbd->alias == key)
848 return kbd->request;
849
850 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
851 if (kbd->alias == key)
852 return kbd->request;
853
854 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
855 if (default_keybindings[i].alias == key)
856 return default_keybindings[i].request;
857
858 return (enum request) key;
859 }
860
861
862 struct key {
863 char *name;
864 int value;
865 };
866
867 static struct key key_table[] = {
868 { "Enter", KEY_RETURN },
869 { "Space", ' ' },
870 { "Backspace", KEY_BACKSPACE },
871 { "Tab", KEY_TAB },
872 { "Escape", KEY_ESC },
873 { "Left", KEY_LEFT },
874 { "Right", KEY_RIGHT },
875 { "Up", KEY_UP },
876 { "Down", KEY_DOWN },
877 { "Insert", KEY_IC },
878 { "Delete", KEY_DC },
879 { "Hash", '#' },
880 { "Home", KEY_HOME },
881 { "End", KEY_END },
882 { "PageUp", KEY_PPAGE },
883 { "PageDown", KEY_NPAGE },
884 { "F1", KEY_F(1) },
885 { "F2", KEY_F(2) },
886 { "F3", KEY_F(3) },
887 { "F4", KEY_F(4) },
888 { "F5", KEY_F(5) },
889 { "F6", KEY_F(6) },
890 { "F7", KEY_F(7) },
891 { "F8", KEY_F(8) },
892 { "F9", KEY_F(9) },
893 { "F10", KEY_F(10) },
894 { "F11", KEY_F(11) },
895 { "F12", KEY_F(12) },
896 };
897
898 static int
899 get_key_value(const char *name)
900 {
901 int i;
902
903 for (i = 0; i < ARRAY_SIZE(key_table); i++)
904 if (!strcasecmp(key_table[i].name, name))
905 return key_table[i].value;
906
907 if (strlen(name) == 1 && isprint(*name))
908 return (int) *name;
909
910 return ERR;
911 }
912
913 static char *
914 get_key(enum request request)
915 {
916 static char buf[BUFSIZ];
917 static char key_char[] = "'X'";
918 size_t pos = 0;
919 char *sep = "";
920 int i;
921
922 buf[pos] = 0;
923
924 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
925 struct keybinding *keybinding = &default_keybindings[i];
926 char *seq = NULL;
927 int key;
928
929 if (keybinding->request != request)
930 continue;
931
932 for (key = 0; key < ARRAY_SIZE(key_table); key++)
933 if (key_table[key].value == keybinding->alias)
934 seq = key_table[key].name;
935
936 if (seq == NULL &&
937 keybinding->alias < 127 &&
938 isprint(keybinding->alias)) {
939 key_char[1] = (char) keybinding->alias;
940 seq = key_char;
941 }
942
943 if (!seq)
944 seq = "'?'";
945
946 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
947 return "Too many keybindings!";
948 sep = ", ";
949 }
950
951 return buf;
952 }
953
954
955 /*
956 * User config file handling.
957 */
958
959 static struct int_map color_map[] = {
960 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
961 COLOR_MAP(DEFAULT),
962 COLOR_MAP(BLACK),
963 COLOR_MAP(BLUE),
964 COLOR_MAP(CYAN),
965 COLOR_MAP(GREEN),
966 COLOR_MAP(MAGENTA),
967 COLOR_MAP(RED),
968 COLOR_MAP(WHITE),
969 COLOR_MAP(YELLOW),
970 };
971
972 #define set_color(color, name) \
973 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
974
975 static struct int_map attr_map[] = {
976 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
977 ATTR_MAP(NORMAL),
978 ATTR_MAP(BLINK),
979 ATTR_MAP(BOLD),
980 ATTR_MAP(DIM),
981 ATTR_MAP(REVERSE),
982 ATTR_MAP(STANDOUT),
983 ATTR_MAP(UNDERLINE),
984 };
985
986 #define set_attribute(attr, name) \
987 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
988
989 static int config_lineno;
990 static bool config_errors;
991 static char *config_msg;
992
993 /* Wants: object fgcolor bgcolor [attr] */
994 static int
995 option_color_command(int argc, char *argv[])
996 {
997 struct line_info *info;
998
999 if (argc != 3 && argc != 4) {
1000 config_msg = "Wrong number of arguments given to color command";
1001 return ERR;
1002 }
1003
1004 info = get_line_info(argv[0], strlen(argv[0]));
1005 if (!info) {
1006 config_msg = "Unknown color name";
1007 return ERR;
1008 }
1009
1010 if (set_color(&info->fg, argv[1]) == ERR ||
1011 set_color(&info->bg, argv[2]) == ERR) {
1012 config_msg = "Unknown color";
1013 return ERR;
1014 }
1015
1016 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1017 config_msg = "Unknown attribute";
1018 return ERR;
1019 }
1020
1021 return OK;
1022 }
1023
1024 /* Wants: name = value */
1025 static int
1026 option_set_command(int argc, char *argv[])
1027 {
1028 if (argc != 3) {
1029 config_msg = "Wrong number of arguments given to set command";
1030 return ERR;
1031 }
1032
1033 if (strcmp(argv[1], "=")) {
1034 config_msg = "No value assigned";
1035 return ERR;
1036 }
1037
1038 if (!strcmp(argv[0], "show-rev-graph")) {
1039 opt_rev_graph = (!strcmp(argv[2], "1") ||
1040 !strcmp(argv[2], "true") ||
1041 !strcmp(argv[2], "yes"));
1042 return OK;
1043 }
1044
1045 if (!strcmp(argv[0], "line-number-interval")) {
1046 opt_num_interval = atoi(argv[2]);
1047 return OK;
1048 }
1049
1050 if (!strcmp(argv[0], "tab-size")) {
1051 opt_tab_size = atoi(argv[2]);
1052 return OK;
1053 }
1054
1055 if (!strcmp(argv[0], "commit-encoding")) {
1056 char *arg = argv[2];
1057 int delimiter = *arg;
1058 int i;
1059
1060 switch (delimiter) {
1061 case '"':
1062 case '\'':
1063 for (arg++, i = 0; arg[i]; i++)
1064 if (arg[i] == delimiter) {
1065 arg[i] = 0;
1066 break;
1067 }
1068 default:
1069 string_ncopy(opt_encoding, arg, strlen(arg));
1070 return OK;
1071 }
1072 }
1073
1074 config_msg = "Unknown variable name";
1075 return ERR;
1076 }
1077
1078 /* Wants: mode request key */
1079 static int
1080 option_bind_command(int argc, char *argv[])
1081 {
1082 enum request request;
1083 int keymap;
1084 int key;
1085
1086 if (argc != 3) {
1087 config_msg = "Wrong number of arguments given to bind command";
1088 return ERR;
1089 }
1090
1091 if (set_keymap(&keymap, argv[0]) == ERR) {
1092 config_msg = "Unknown key map";
1093 return ERR;
1094 }
1095
1096 key = get_key_value(argv[1]);
1097 if (key == ERR) {
1098 config_msg = "Unknown key";
1099 return ERR;
1100 }
1101
1102 request = get_request(argv[2]);
1103 if (request == REQ_UNKNOWN) {
1104 config_msg = "Unknown request name";
1105 return ERR;
1106 }
1107
1108 add_keybinding(keymap, request, key);
1109
1110 return OK;
1111 }
1112
1113 static int
1114 set_option(char *opt, char *value)
1115 {
1116 char *argv[16];
1117 int valuelen;
1118 int argc = 0;
1119
1120 /* Tokenize */
1121 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1122 argv[argc++] = value;
1123
1124 value += valuelen;
1125 if (!*value)
1126 break;
1127
1128 *value++ = 0;
1129 while (isspace(*value))
1130 value++;
1131 }
1132
1133 if (!strcmp(opt, "color"))
1134 return option_color_command(argc, argv);
1135
1136 if (!strcmp(opt, "set"))
1137 return option_set_command(argc, argv);
1138
1139 if (!strcmp(opt, "bind"))
1140 return option_bind_command(argc, argv);
1141
1142 config_msg = "Unknown option command";
1143 return ERR;
1144 }
1145
1146 static int
1147 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1148 {
1149 int status = OK;
1150
1151 config_lineno++;
1152 config_msg = "Internal error";
1153
1154 /* Check for comment markers, since read_properties() will
1155 * only ensure opt and value are split at first " \t". */
1156 optlen = strcspn(opt, "#");
1157 if (optlen == 0)
1158 return OK;
1159
1160 if (opt[optlen] != 0) {
1161 config_msg = "No option value";
1162 status = ERR;
1163
1164 } else {
1165 /* Look for comment endings in the value. */
1166 size_t len = strcspn(value, "#");
1167
1168 if (len < valuelen) {
1169 valuelen = len;
1170 value[valuelen] = 0;
1171 }
1172
1173 status = set_option(opt, value);
1174 }
1175
1176 if (status == ERR) {
1177 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1178 config_lineno, (int) optlen, opt, config_msg);
1179 config_errors = TRUE;
1180 }
1181
1182 /* Always keep going if errors are encountered. */
1183 return OK;
1184 }
1185
1186 static int
1187 load_options(void)
1188 {
1189 char *home = getenv("HOME");
1190 char buf[SIZEOF_STR];
1191 FILE *file;
1192
1193 config_lineno = 0;
1194 config_errors = FALSE;
1195
1196 if (!home || !string_format(buf, "%s/.tigrc", home))
1197 return ERR;
1198
1199 /* It's ok that the file doesn't exist. */
1200 file = fopen(buf, "r");
1201 if (!file)
1202 return OK;
1203
1204 if (read_properties(file, " \t", read_option) == ERR ||
1205 config_errors == TRUE)
1206 fprintf(stderr, "Errors while loading %s.\n", buf);
1207
1208 return OK;
1209 }
1210
1211
1212 /*
1213 * The viewer
1214 */
1215
1216 struct view;
1217 struct view_ops;
1218
1219 /* The display array of active views and the index of the current view. */
1220 static struct view *display[2];
1221 static unsigned int current_view;
1222
1223 /* Reading from the prompt? */
1224 static bool input_mode = FALSE;
1225
1226 #define foreach_displayed_view(view, i) \
1227 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1228
1229 #define displayed_views() (display[1] != NULL ? 2 : 1)
1230
1231 /* Current head and commit ID */
1232 static char ref_blob[SIZEOF_REF] = "";
1233 static char ref_commit[SIZEOF_REF] = "HEAD";
1234 static char ref_head[SIZEOF_REF] = "HEAD";
1235
1236 struct view {
1237 const char *name; /* View name */
1238 const char *cmd_fmt; /* Default command line format */
1239 const char *cmd_env; /* Command line set via environment */
1240 const char *id; /* Points to either of ref_{head,commit,blob} */
1241
1242 struct view_ops *ops; /* View operations */
1243
1244 enum keymap keymap; /* What keymap does this view have */
1245
1246 char cmd[SIZEOF_STR]; /* Command buffer */
1247 char ref[SIZEOF_REF]; /* Hovered commit reference */
1248 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1249
1250 int height, width; /* The width and height of the main window */
1251 WINDOW *win; /* The main window */
1252 WINDOW *title; /* The title window living below the main window */
1253
1254 /* Navigation */
1255 unsigned long offset; /* Offset of the window top */
1256 unsigned long lineno; /* Current line number */
1257
1258 /* Searching */
1259 char grep[SIZEOF_STR]; /* Search string */
1260 regex_t *regex; /* Pre-compiled regex */
1261
1262 /* If non-NULL, points to the view that opened this view. If this view
1263 * is closed tig will switch back to the parent view. */
1264 struct view *parent;
1265
1266 /* Buffering */
1267 unsigned long lines; /* Total number of lines */
1268 struct line *line; /* Line index */
1269 unsigned long line_size;/* Total number of allocated lines */
1270 unsigned int digits; /* Number of digits in the lines member. */
1271
1272 /* Loading */
1273 FILE *pipe;
1274 time_t start_time;
1275 };
1276
1277 struct view_ops {
1278 /* What type of content being displayed. Used in the title bar. */
1279 const char *type;
1280 /* Open and reads in all view content. */
1281 bool (*open)(struct view *view);
1282 /* Read one line; updates view->line. */
1283 bool (*read)(struct view *view, char *data);
1284 /* Draw one line; @lineno must be < view->height. */
1285 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1286 /* Depending on view handle a special requests. */
1287 enum request (*request)(struct view *view, enum request request, struct line *line);
1288 /* Search for regex in a line. */
1289 bool (*grep)(struct view *view, struct line *line);
1290 /* Select line */
1291 void (*select)(struct view *view, struct line *line);
1292 };
1293
1294 static struct view_ops pager_ops;
1295 static struct view_ops main_ops;
1296 static struct view_ops tree_ops;
1297 static struct view_ops blob_ops;
1298 static struct view_ops help_ops;
1299 static struct view_ops status_ops;
1300 static struct view_ops stage_ops;
1301
1302 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1303 { name, cmd, #env, ref, ops, map}
1304
1305 #define VIEW_(id, name, ops, ref) \
1306 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1307
1308
1309 static struct view views[] = {
1310 VIEW_(MAIN, "main", &main_ops, ref_head),
1311 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1312 VIEW_(LOG, "log", &pager_ops, ref_head),
1313 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1314 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1315 VIEW_(HELP, "help", &help_ops, ""),
1316 VIEW_(PAGER, "pager", &pager_ops, "stdin"),
1317 VIEW_(STATUS, "status", &status_ops, ""),
1318 VIEW_(STAGE, "stage", &stage_ops, ""),
1319 };
1320
1321 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1322
1323 #define foreach_view(view, i) \
1324 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1325
1326 #define view_is_displayed(view) \
1327 (view == display[0] || view == display[1])
1328
1329 static bool
1330 draw_view_line(struct view *view, unsigned int lineno)
1331 {
1332 struct line *line;
1333 bool selected = (view->offset + lineno == view->lineno);
1334 bool draw_ok;
1335
1336 assert(view_is_displayed(view));
1337
1338 if (view->offset + lineno >= view->lines)
1339 return FALSE;
1340
1341 line = &view->line[view->offset + lineno];
1342
1343 if (selected) {
1344 line->selected = TRUE;
1345 view->ops->select(view, line);
1346 } else if (line->selected) {
1347 line->selected = FALSE;
1348 wmove(view->win, lineno, 0);
1349 wclrtoeol(view->win);
1350 }
1351
1352 scrollok(view->win, FALSE);
1353 draw_ok = view->ops->draw(view, line, lineno, selected);
1354 scrollok(view->win, TRUE);
1355
1356 return draw_ok;
1357 }
1358
1359 static void
1360 redraw_view_from(struct view *view, int lineno)
1361 {
1362 assert(0 <= lineno && lineno < view->height);
1363
1364 for (; lineno < view->height; lineno++) {
1365 if (!draw_view_line(view, lineno))
1366 break;
1367 }
1368
1369 redrawwin(view->win);
1370 if (input_mode)
1371 wnoutrefresh(view->win);
1372 else
1373 wrefresh(view->win);
1374 }
1375
1376 static void
1377 redraw_view(struct view *view)
1378 {
1379 wclear(view->win);
1380 redraw_view_from(view, 0);
1381 }
1382
1383
1384 static void
1385 update_view_title(struct view *view)
1386 {
1387 char buf[SIZEOF_STR];
1388 char state[SIZEOF_STR];
1389 size_t bufpos = 0, statelen = 0;
1390
1391 assert(view_is_displayed(view));
1392
1393 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1394 unsigned int view_lines = view->offset + view->height;
1395 unsigned int lines = view->lines
1396 ? MIN(view_lines, view->lines) * 100 / view->lines
1397 : 0;
1398
1399 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1400 view->ops->type,
1401 view->lineno + 1,
1402 view->lines,
1403 lines);
1404
1405 if (view->pipe) {
1406 time_t secs = time(NULL) - view->start_time;
1407
1408 /* Three git seconds are a long time ... */
1409 if (secs > 2)
1410 string_format_from(state, &statelen, " %lds", secs);
1411 }
1412 }
1413
1414 string_format_from(buf, &bufpos, "[%s]", view->name);
1415 if (*view->ref && bufpos < view->width) {
1416 size_t refsize = strlen(view->ref);
1417 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1418
1419 if (minsize < view->width)
1420 refsize = view->width - minsize + 7;
1421 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1422 }
1423
1424 if (statelen && bufpos < view->width) {
1425 string_format_from(buf, &bufpos, " %s", state);
1426 }
1427
1428 if (view == display[current_view])
1429 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1430 else
1431 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1432
1433 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1434 wclrtoeol(view->title);
1435 wmove(view->title, 0, view->width - 1);
1436
1437 if (input_mode)
1438 wnoutrefresh(view->title);
1439 else
1440 wrefresh(view->title);
1441 }
1442
1443 static void
1444 resize_display(void)
1445 {
1446 int offset, i;
1447 struct view *base = display[0];
1448 struct view *view = display[1] ? display[1] : display[0];
1449
1450 /* Setup window dimensions */
1451
1452 getmaxyx(stdscr, base->height, base->width);
1453
1454 /* Make room for the status window. */
1455 base->height -= 1;
1456
1457 if (view != base) {
1458 /* Horizontal split. */
1459 view->width = base->width;
1460 view->height = SCALE_SPLIT_VIEW(base->height);
1461 base->height -= view->height;
1462
1463 /* Make room for the title bar. */
1464 view->height -= 1;
1465 }
1466
1467 /* Make room for the title bar. */
1468 base->height -= 1;
1469
1470 offset = 0;
1471
1472 foreach_displayed_view (view, i) {
1473 if (!view->win) {
1474 view->win = newwin(view->height, 0, offset, 0);
1475 if (!view->win)
1476 die("Failed to create %s view", view->name);
1477
1478 scrollok(view->win, TRUE);
1479
1480 view->title = newwin(1, 0, offset + view->height, 0);
1481 if (!view->title)
1482 die("Failed to create title window");
1483
1484 } else {
1485 wresize(view->win, view->height, view->width);
1486 mvwin(view->win, offset, 0);
1487 mvwin(view->title, offset + view->height, 0);
1488 }
1489
1490 offset += view->height + 1;
1491 }
1492 }
1493
1494 static void
1495 redraw_display(void)
1496 {
1497 struct view *view;
1498 int i;
1499
1500 foreach_displayed_view (view, i) {
1501 redraw_view(view);
1502 update_view_title(view);
1503 }
1504 }
1505
1506 static void
1507 update_display_cursor(struct view *view)
1508 {
1509 /* Move the cursor to the right-most column of the cursor line.
1510 *
1511 * XXX: This could turn out to be a bit expensive, but it ensures that
1512 * the cursor does not jump around. */
1513 if (view->lines) {
1514 wmove(view->win, view->lineno - view->offset, view->width - 1);
1515 wrefresh(view->win);
1516 }
1517 }
1518
1519 /*
1520 * Navigation
1521 */
1522
1523 /* Scrolling backend */
1524 static void
1525 do_scroll_view(struct view *view, int lines)
1526 {
1527 bool redraw_current_line = FALSE;
1528
1529 /* The rendering expects the new offset. */
1530 view->offset += lines;
1531
1532 assert(0 <= view->offset && view->offset < view->lines);
1533 assert(lines);
1534
1535 /* Move current line into the view. */
1536 if (view->lineno < view->offset) {
1537 view->lineno = view->offset;
1538 redraw_current_line = TRUE;
1539 } else if (view->lineno >= view->offset + view->height) {
1540 view->lineno = view->offset + view->height - 1;
1541 redraw_current_line = TRUE;
1542 }
1543
1544 assert(view->offset <= view->lineno && view->lineno < view->lines);
1545
1546 /* Redraw the whole screen if scrolling is pointless. */
1547 if (view->height < ABS(lines)) {
1548 redraw_view(view);
1549
1550 } else {
1551 int line = lines > 0 ? view->height - lines : 0;
1552 int end = line + ABS(lines);
1553
1554 wscrl(view->win, lines);
1555
1556 for (; line < end; line++) {
1557 if (!draw_view_line(view, line))
1558 break;
1559 }
1560
1561 if (redraw_current_line)
1562 draw_view_line(view, view->lineno - view->offset);
1563 }
1564
1565 redrawwin(view->win);
1566 wrefresh(view->win);
1567 report("");
1568 }
1569
1570 /* Scroll frontend */
1571 static void
1572 scroll_view(struct view *view, enum request request)
1573 {
1574 int lines = 1;
1575
1576 assert(view_is_displayed(view));
1577
1578 switch (request) {
1579 case REQ_SCROLL_PAGE_DOWN:
1580 lines = view->height;
1581 case REQ_SCROLL_LINE_DOWN:
1582 if (view->offset + lines > view->lines)
1583 lines = view->lines - view->offset;
1584
1585 if (lines == 0 || view->offset + view->height >= view->lines) {
1586 report("Cannot scroll beyond the last line");
1587 return;
1588 }
1589 break;
1590
1591 case REQ_SCROLL_PAGE_UP:
1592 lines = view->height;
1593 case REQ_SCROLL_LINE_UP:
1594 if (lines > view->offset)
1595 lines = view->offset;
1596
1597 if (lines == 0) {
1598 report("Cannot scroll beyond the first line");
1599 return;
1600 }
1601
1602 lines = -lines;
1603 break;
1604
1605 default:
1606 die("request %d not handled in switch", request);
1607 }
1608
1609 do_scroll_view(view, lines);
1610 }
1611
1612 /* Cursor moving */
1613 static void
1614 move_view(struct view *view, enum request request)
1615 {
1616 int scroll_steps = 0;
1617 int steps;
1618
1619 switch (request) {
1620 case REQ_MOVE_FIRST_LINE:
1621 steps = -view->lineno;
1622 break;
1623
1624 case REQ_MOVE_LAST_LINE:
1625 steps = view->lines - view->lineno - 1;
1626 break;
1627
1628 case REQ_MOVE_PAGE_UP:
1629 steps = view->height > view->lineno
1630 ? -view->lineno : -view->height;
1631 break;
1632
1633 case REQ_MOVE_PAGE_DOWN:
1634 steps = view->lineno + view->height >= view->lines
1635 ? view->lines - view->lineno - 1 : view->height;
1636 break;
1637
1638 case REQ_MOVE_UP:
1639 steps = -1;
1640 break;
1641
1642 case REQ_MOVE_DOWN:
1643 steps = 1;
1644 break;
1645
1646 default:
1647 die("request %d not handled in switch", request);
1648 }
1649
1650 if (steps <= 0 && view->lineno == 0) {
1651 report("Cannot move beyond the first line");
1652 return;
1653
1654 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1655 report("Cannot move beyond the last line");
1656 return;
1657 }
1658
1659 /* Move the current line */
1660 view->lineno += steps;
1661 assert(0 <= view->lineno && view->lineno < view->lines);
1662
1663 /* Check whether the view needs to be scrolled */
1664 if (view->lineno < view->offset ||
1665 view->lineno >= view->offset + view->height) {
1666 scroll_steps = steps;
1667 if (steps < 0 && -steps > view->offset) {
1668 scroll_steps = -view->offset;
1669
1670 } else if (steps > 0) {
1671 if (view->lineno == view->lines - 1 &&
1672 view->lines > view->height) {
1673 scroll_steps = view->lines - view->offset - 1;
1674 if (scroll_steps >= view->height)
1675 scroll_steps -= view->height - 1;
1676 }
1677 }
1678 }
1679
1680 if (!view_is_displayed(view)) {
1681 view->offset += scroll_steps;
1682 assert(0 <= view->offset && view->offset < view->lines);
1683 view->ops->select(view, &view->line[view->lineno]);
1684 return;
1685 }
1686
1687 /* Repaint the old "current" line if we be scrolling */
1688 if (ABS(steps) < view->height)
1689 draw_view_line(view, view->lineno - steps - view->offset);
1690
1691 if (scroll_steps) {
1692 do_scroll_view(view, scroll_steps);
1693 return;
1694 }
1695
1696 /* Draw the current line */
1697 draw_view_line(view, view->lineno - view->offset);
1698
1699 redrawwin(view->win);
1700 wrefresh(view->win);
1701 report("");
1702 }
1703
1704
1705 /*
1706 * Searching
1707 */
1708
1709 static void search_view(struct view *view, enum request request);
1710
1711 static bool
1712 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1713 {
1714 assert(view_is_displayed(view));
1715
1716 if (!view->ops->grep(view, line))
1717 return FALSE;
1718
1719 if (lineno - view->offset >= view->height) {
1720 view->offset = lineno;
1721 view->lineno = lineno;
1722 redraw_view(view);
1723
1724 } else {
1725 unsigned long old_lineno = view->lineno - view->offset;
1726
1727 view->lineno = lineno;
1728 draw_view_line(view, old_lineno);
1729
1730 draw_view_line(view, view->lineno - view->offset);
1731 redrawwin(view->win);
1732 wrefresh(view->win);
1733 }
1734
1735 report("Line %ld matches '%s'", lineno + 1, view->grep);
1736 return TRUE;
1737 }
1738
1739 static void
1740 find_next(struct view *view, enum request request)
1741 {
1742 unsigned long lineno = view->lineno;
1743 int direction;
1744
1745 if (!*view->grep) {
1746 if (!*opt_search)
1747 report("No previous search");
1748 else
1749 search_view(view, request);
1750 return;
1751 }
1752
1753 switch (request) {
1754 case REQ_SEARCH:
1755 case REQ_FIND_NEXT:
1756 direction = 1;
1757 break;
1758
1759 case REQ_SEARCH_BACK:
1760 case REQ_FIND_PREV:
1761 direction = -1;
1762 break;
1763
1764 default:
1765 return;
1766 }
1767
1768 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1769 lineno += direction;
1770
1771 /* Note, lineno is unsigned long so will wrap around in which case it
1772 * will become bigger than view->lines. */
1773 for (; lineno < view->lines; lineno += direction) {
1774 struct line *line = &view->line[lineno];
1775
1776 if (find_next_line(view, lineno, line))
1777 return;
1778 }
1779
1780 report("No match found for '%s'", view->grep);
1781 }
1782
1783 static void
1784 search_view(struct view *view, enum request request)
1785 {
1786 int regex_err;
1787
1788 if (view->regex) {
1789 regfree(view->regex);
1790 *view->grep = 0;
1791 } else {
1792 view->regex = calloc(1, sizeof(*view->regex));
1793 if (!view->regex)
1794 return;
1795 }
1796
1797 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1798 if (regex_err != 0) {
1799 char buf[SIZEOF_STR] = "unknown error";
1800
1801 regerror(regex_err, view->regex, buf, sizeof(buf));
1802 report("Search failed: %s", buf);
1803 return;
1804 }
1805
1806 string_copy(view->grep, opt_search);
1807
1808 find_next(view, request);
1809 }
1810
1811 /*
1812 * Incremental updating
1813 */
1814
1815 static void
1816 end_update(struct view *view)
1817 {
1818 if (!view->pipe)
1819 return;
1820 set_nonblocking_input(FALSE);
1821 if (view->pipe == stdin)
1822 fclose(view->pipe);
1823 else
1824 pclose(view->pipe);
1825 view->pipe = NULL;
1826 }
1827
1828 static bool
1829 begin_update(struct view *view)
1830 {
1831 if (view->pipe)
1832 end_update(view);
1833
1834 if (opt_cmd[0]) {
1835 string_copy(view->cmd, opt_cmd);
1836 opt_cmd[0] = 0;
1837 /* When running random commands, initially show the
1838 * command in the title. However, it maybe later be
1839 * overwritten if a commit line is selected. */
1840 if (view == VIEW(REQ_VIEW_PAGER))
1841 string_copy(view->ref, view->cmd);
1842 else
1843 view->ref[0] = 0;
1844
1845 } else if (view == VIEW(REQ_VIEW_TREE)) {
1846 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1847 char path[SIZEOF_STR];
1848
1849 if (strcmp(view->vid, view->id))
1850 opt_path[0] = path[0] = 0;
1851 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
1852 return FALSE;
1853
1854 if (!string_format(view->cmd, format, view->id, path))
1855 return FALSE;
1856
1857 } else {
1858 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1859 const char *id = view->id;
1860
1861 if (!string_format(view->cmd, format, id, id, id, id, id))
1862 return FALSE;
1863
1864 /* Put the current ref_* value to the view title ref
1865 * member. This is needed by the blob view. Most other
1866 * views sets it automatically after loading because the
1867 * first line is a commit line. */
1868 string_copy_rev(view->ref, view->id);
1869 }
1870
1871 /* Special case for the pager view. */
1872 if (opt_pipe) {
1873 view->pipe = opt_pipe;
1874 opt_pipe = NULL;
1875 } else {
1876 view->pipe = popen(view->cmd, "r");
1877 }
1878
1879 if (!view->pipe)
1880 return FALSE;
1881
1882 set_nonblocking_input(TRUE);
1883
1884 view->offset = 0;
1885 view->lines = 0;
1886 view->lineno = 0;
1887 string_copy_rev(view->vid, view->id);
1888
1889 if (view->line) {
1890 int i;
1891
1892 for (i = 0; i < view->lines; i++)
1893 if (view->line[i].data)
1894 free(view->line[i].data);
1895
1896 free(view->line);
1897 view->line = NULL;
1898 }
1899
1900 view->start_time = time(NULL);
1901
1902 return TRUE;
1903 }
1904
1905 static struct line *
1906 realloc_lines(struct view *view, size_t line_size)
1907 {
1908 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1909
1910 if (!tmp)
1911 return NULL;
1912
1913 view->line = tmp;
1914 view->line_size = line_size;
1915 return view->line;
1916 }
1917
1918 static bool
1919 update_view(struct view *view)
1920 {
1921 char in_buffer[BUFSIZ];
1922 char out_buffer[BUFSIZ * 2];
1923 char *line;
1924 /* The number of lines to read. If too low it will cause too much
1925 * redrawing (and possible flickering), if too high responsiveness
1926 * will suffer. */
1927 unsigned long lines = view->height;
1928 int redraw_from = -1;
1929
1930 if (!view->pipe)
1931 return TRUE;
1932
1933 /* Only redraw if lines are visible. */
1934 if (view->offset + view->height >= view->lines)
1935 redraw_from = view->lines - view->offset;
1936
1937 /* FIXME: This is probably not perfect for backgrounded views. */
1938 if (!realloc_lines(view, view->lines + lines))
1939 goto alloc_error;
1940
1941 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1942 size_t linelen = strlen(line);
1943
1944 if (linelen)
1945 line[linelen - 1] = 0;
1946
1947 if (opt_iconv != ICONV_NONE) {
1948 ICONV_CONST char *inbuf = line;
1949 size_t inlen = linelen;
1950
1951 char *outbuf = out_buffer;
1952 size_t outlen = sizeof(out_buffer);
1953
1954 size_t ret;
1955
1956 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1957 if (ret != (size_t) -1) {
1958 line = out_buffer;
1959 linelen = strlen(out_buffer);
1960 }
1961 }
1962
1963 if (!view->ops->read(view, line))
1964 goto alloc_error;
1965
1966 if (lines-- == 1)
1967 break;
1968 }
1969
1970 {
1971 int digits;
1972
1973 lines = view->lines;
1974 for (digits = 0; lines; digits++)
1975 lines /= 10;
1976
1977 /* Keep the displayed view in sync with line number scaling. */
1978 if (digits != view->digits) {
1979 view->digits = digits;
1980 redraw_from = 0;
1981 }
1982 }
1983
1984 if (!view_is_displayed(view))
1985 goto check_pipe;
1986
1987 if (view == VIEW(REQ_VIEW_TREE)) {
1988 /* Clear the view and redraw everything since the tree sorting
1989 * might have rearranged things. */
1990 redraw_view(view);
1991
1992 } else if (redraw_from >= 0) {
1993 /* If this is an incremental update, redraw the previous line
1994 * since for commits some members could have changed when
1995 * loading the main view. */
1996 if (redraw_from > 0)
1997 redraw_from--;
1998
1999 /* Since revision graph visualization requires knowledge
2000 * about the parent commit, it causes a further one-off
2001 * needed to be redrawn for incremental updates. */
2002 if (redraw_from > 0 && opt_rev_graph)
2003 redraw_from--;
2004
2005 /* Incrementally draw avoids flickering. */
2006 redraw_view_from(view, redraw_from);
2007 }
2008
2009 /* Update the title _after_ the redraw so that if the redraw picks up a
2010 * commit reference in view->ref it'll be available here. */
2011 update_view_title(view);
2012
2013 check_pipe:
2014 if (ferror(view->pipe)) {
2015 report("Failed to read: %s", strerror(errno));
2016 goto end;
2017
2018 } else if (feof(view->pipe)) {
2019 report("");
2020 goto end;
2021 }
2022
2023 return TRUE;
2024
2025 alloc_error:
2026 report("Allocation failure");
2027
2028 end:
2029 view->ops->read(view, NULL);
2030 end_update(view);
2031 return FALSE;
2032 }
2033
2034 static struct line *
2035 add_line_data(struct view *view, void *data, enum line_type type)
2036 {
2037 struct line *line = &view->line[view->lines++];
2038
2039 memset(line, 0, sizeof(*line));
2040 line->type = type;
2041 line->data = data;
2042
2043 return line;
2044 }
2045
2046 static struct line *
2047 add_line_text(struct view *view, char *data, enum line_type type)
2048 {
2049 if (data)
2050 data = strdup(data);
2051
2052 return data ? add_line_data(view, data, type) : NULL;
2053 }
2054
2055
2056 /*
2057 * View opening
2058 */
2059
2060 enum open_flags {
2061 OPEN_DEFAULT = 0, /* Use default view switching. */
2062 OPEN_SPLIT = 1, /* Split current view. */
2063 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2064 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2065 };
2066
2067 static void
2068 open_view(struct view *prev, enum request request, enum open_flags flags)
2069 {
2070 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2071 bool split = !!(flags & OPEN_SPLIT);
2072 bool reload = !!(flags & OPEN_RELOAD);
2073 struct view *view = VIEW(request);
2074 int nviews = displayed_views();
2075 struct view *base_view = display[0];
2076
2077 if (view == prev && nviews == 1 && !reload) {
2078 report("Already in %s view", view->name);
2079 return;
2080 }
2081
2082 if (view->ops->open) {
2083 if (!view->ops->open(view)) {
2084 report("Failed to load %s view", view->name);
2085 return;
2086 }
2087
2088 } else if ((reload || strcmp(view->vid, view->id)) &&
2089 !begin_update(view)) {
2090 report("Failed to load %s view", view->name);
2091 return;
2092 }
2093
2094 if (split) {
2095 display[1] = view;
2096 if (!backgrounded)
2097 current_view = 1;
2098 } else {
2099 /* Maximize the current view. */
2100 memset(display, 0, sizeof(display));
2101 current_view = 0;
2102 display[current_view] = view;
2103 }
2104
2105 /* Resize the view when switching between split- and full-screen,
2106 * or when switching between two different full-screen views. */
2107 if (nviews != displayed_views() ||
2108 (nviews == 1 && base_view != display[0]))
2109 resize_display();
2110
2111 if (split && prev->lineno - prev->offset >= prev->height) {
2112 /* Take the title line into account. */
2113 int lines = prev->lineno - prev->offset - prev->height + 1;
2114
2115 /* Scroll the view that was split if the current line is
2116 * outside the new limited view. */
2117 do_scroll_view(prev, lines);
2118 }
2119
2120 if (prev && view != prev) {
2121 if (split && !backgrounded) {
2122 /* "Blur" the previous view. */
2123 update_view_title(prev);
2124 }
2125
2126 view->parent = prev;
2127 }
2128
2129 if (view->pipe && view->lines == 0) {
2130 /* Clear the old view and let the incremental updating refill
2131 * the screen. */
2132 wclear(view->win);
2133 report("");
2134 } else {
2135 redraw_view(view);
2136 report("");
2137 }
2138
2139 /* If the view is backgrounded the above calls to report()
2140 * won't redraw the view title. */
2141 if (backgrounded)
2142 update_view_title(view);
2143 }
2144
2145 static void
2146 open_editor(struct view *view, char *file)
2147 {
2148 char cmd[SIZEOF_STR];
2149 char file_sq[SIZEOF_STR];
2150 char *editor;
2151
2152 editor = getenv("GIT_EDITOR");
2153 if (!editor && *opt_editor)
2154 editor = opt_editor;
2155 if (!editor)
2156 editor = getenv("VISUAL");
2157 if (!editor)
2158 editor = getenv("EDITOR");
2159 if (!editor)
2160 editor = "vi";
2161
2162 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2163 string_format(cmd, "%s %s", editor, file_sq)) {
2164 def_prog_mode(); /* save current tty modes */
2165 endwin(); /* restore original tty modes */
2166 system(cmd);
2167 reset_prog_mode();
2168 redraw_display();
2169 }
2170 }
2171
2172 /*
2173 * User request switch noodle
2174 */
2175
2176 static int
2177 view_driver(struct view *view, enum request request)
2178 {
2179 int i;
2180
2181 if (request == REQ_NONE) {
2182 doupdate();
2183 return TRUE;
2184 }
2185
2186 if (view && view->lines) {
2187 request = view->ops->request(view, request, &view->line[view->lineno]);
2188 if (request == REQ_NONE)
2189 return TRUE;
2190 }
2191
2192 switch (request) {
2193 case REQ_MOVE_UP:
2194 case REQ_MOVE_DOWN:
2195 case REQ_MOVE_PAGE_UP:
2196 case REQ_MOVE_PAGE_DOWN:
2197 case REQ_MOVE_FIRST_LINE:
2198 case REQ_MOVE_LAST_LINE:
2199 move_view(view, request);
2200 break;
2201
2202 case REQ_SCROLL_LINE_DOWN:
2203 case REQ_SCROLL_LINE_UP:
2204 case REQ_SCROLL_PAGE_DOWN:
2205 case REQ_SCROLL_PAGE_UP:
2206 scroll_view(view, request);
2207 break;
2208
2209 case REQ_VIEW_BLOB:
2210 if (!ref_blob[0]) {
2211 report("No file chosen, press %s to open tree view",
2212 get_key(REQ_VIEW_TREE));
2213 break;
2214 }
2215 open_view(view, request, OPEN_DEFAULT);
2216 break;
2217
2218 case REQ_VIEW_PAGER:
2219 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2220 report("No pager content, press %s to run command from prompt",
2221 get_key(REQ_PROMPT));
2222 break;
2223 }
2224 open_view(view, request, OPEN_DEFAULT);
2225 break;
2226
2227 case REQ_VIEW_STAGE:
2228 if (!VIEW(REQ_VIEW_STAGE)->lines) {
2229 report("No stage content, press %s to open the status view and choose file",
2230 get_key(REQ_VIEW_STATUS));
2231 break;
2232 }
2233 open_view(view, request, OPEN_DEFAULT);
2234 break;
2235
2236 case REQ_VIEW_MAIN:
2237 case REQ_VIEW_DIFF:
2238 case REQ_VIEW_LOG:
2239 case REQ_VIEW_TREE:
2240 case REQ_VIEW_HELP:
2241 case REQ_VIEW_STATUS:
2242 open_view(view, request, OPEN_DEFAULT);
2243 break;
2244
2245 case REQ_NEXT:
2246 case REQ_PREVIOUS:
2247 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2248
2249 if ((view == VIEW(REQ_VIEW_DIFF) &&
2250 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2251 (view == VIEW(REQ_VIEW_STAGE) &&
2252 view->parent == VIEW(REQ_VIEW_STATUS)) ||
2253 (view == VIEW(REQ_VIEW_BLOB) &&
2254 view->parent == VIEW(REQ_VIEW_TREE))) {
2255 int line;
2256
2257 view = view->parent;
2258 line = view->lineno;
2259 move_view(view, request);
2260 if (view_is_displayed(view))
2261 update_view_title(view);
2262 if (line != view->lineno)
2263 view->ops->request(view, REQ_ENTER,
2264 &view->line[view->lineno]);
2265
2266 } else {
2267 move_view(view, request);
2268 }
2269 break;
2270
2271 case REQ_VIEW_NEXT:
2272 {
2273 int nviews = displayed_views();
2274 int next_view = (current_view + 1) % nviews;
2275
2276 if (next_view == current_view) {
2277 report("Only one view is displayed");
2278 break;
2279 }
2280
2281 current_view = next_view;
2282 /* Blur out the title of the previous view. */
2283 update_view_title(view);
2284 report("");
2285 break;
2286 }
2287 case REQ_TOGGLE_LINENO:
2288 opt_line_number = !opt_line_number;
2289 redraw_display();
2290 break;
2291
2292 case REQ_TOGGLE_REV_GRAPH:
2293 opt_rev_graph = !opt_rev_graph;
2294 redraw_display();
2295 break;
2296
2297 case REQ_PROMPT:
2298 /* Always reload^Wrerun commands from the prompt. */
2299 open_view(view, opt_request, OPEN_RELOAD);
2300 break;
2301
2302 case REQ_SEARCH:
2303 case REQ_SEARCH_BACK:
2304 search_view(view, request);
2305 break;
2306
2307 case REQ_FIND_NEXT:
2308 case REQ_FIND_PREV:
2309 find_next(view, request);
2310 break;
2311
2312 case REQ_STOP_LOADING:
2313 for (i = 0; i < ARRAY_SIZE(views); i++) {
2314 view = &views[i];
2315 if (view->pipe)
2316 report("Stopped loading the %s view", view->name),
2317 end_update(view);
2318 }
2319 break;
2320
2321 case REQ_SHOW_VERSION:
2322 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
2323 return TRUE;
2324
2325 case REQ_SCREEN_RESIZE:
2326 resize_display();
2327 /* Fall-through */
2328 case REQ_SCREEN_REDRAW:
2329 redraw_display();
2330 break;
2331
2332 case REQ_EDIT:
2333 report("Nothing to edit");
2334 break;
2335
2336 case REQ_CHERRY_PICK:
2337 report("Nothing to cherry-pick");
2338 break;
2339
2340 case REQ_ENTER:
2341 report("Nothing to enter");
2342 break;
2343
2344
2345 case REQ_VIEW_CLOSE:
2346 /* XXX: Mark closed views by letting view->parent point to the
2347 * view itself. Parents to closed view should never be
2348 * followed. */
2349 if (view->parent &&
2350 view->parent->parent != view->parent) {
2351 memset(display, 0, sizeof(display));
2352 current_view = 0;
2353 display[current_view] = view->parent;
2354 view->parent = view;
2355 resize_display();
2356 redraw_display();
2357 break;
2358 }
2359 /* Fall-through */
2360 case REQ_QUIT:
2361 return FALSE;
2362
2363 default:
2364 /* An unknown key will show most commonly used commands. */
2365 report("Unknown key, press 'h' for help");
2366 return TRUE;
2367 }
2368
2369 return TRUE;
2370 }
2371
2372
2373 /*
2374 * Pager backend
2375 */
2376
2377 static bool
2378 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2379 {
2380 char *text = line->data;
2381 enum line_type type = line->type;
2382 int textlen = strlen(text);
2383 int attr;
2384
2385 wmove(view->win, lineno, 0);
2386
2387 if (selected) {
2388 type = LINE_CURSOR;
2389 wchgat(view->win, -1, 0, type, NULL);
2390 }
2391
2392 attr = get_line_attr(type);
2393 wattrset(view->win, attr);
2394
2395 if (opt_line_number || opt_tab_size < TABSIZE) {
2396 static char spaces[] = " ";
2397 int col_offset = 0, col = 0;
2398
2399 if (opt_line_number) {
2400 unsigned long real_lineno = view->offset + lineno + 1;
2401
2402 if (real_lineno == 1 ||
2403 (real_lineno % opt_num_interval) == 0) {
2404 wprintw(view->win, "%.*d", view->digits, real_lineno);
2405
2406 } else {
2407 waddnstr(view->win, spaces,
2408 MIN(view->digits, STRING_SIZE(spaces)));
2409 }
2410 waddstr(view->win, ": ");
2411 col_offset = view->digits + 2;
2412 }
2413
2414 while (text && col_offset + col < view->width) {
2415 int cols_max = view->width - col_offset - col;
2416 char *pos = text;
2417 int cols;
2418
2419 if (*text == '\t') {
2420 text++;
2421 assert(sizeof(spaces) > TABSIZE);
2422 pos = spaces;
2423 cols = opt_tab_size - (col % opt_tab_size);
2424
2425 } else {
2426 text = strchr(text, '\t');
2427 cols = line ? text - pos : strlen(pos);
2428 }
2429
2430 waddnstr(view->win, pos, MIN(cols, cols_max));
2431 col += cols;
2432 }
2433
2434 } else {
2435 int col = 0, pos = 0;
2436
2437 for (; pos < textlen && col < view->width; pos++, col++)
2438 if (text[pos] == '\t')
2439 col += TABSIZE - (col % TABSIZE) - 1;
2440
2441 waddnstr(view->win, text, pos);
2442 }
2443
2444 return TRUE;
2445 }
2446
2447 static bool
2448 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2449 {
2450 char refbuf[SIZEOF_STR];
2451 char *ref = NULL;
2452 FILE *pipe;
2453
2454 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2455 return TRUE;
2456
2457 pipe = popen(refbuf, "r");
2458 if (!pipe)
2459 return TRUE;
2460
2461 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2462 ref = chomp_string(ref);
2463 pclose(pipe);
2464
2465 if (!ref || !*ref)
2466 return TRUE;
2467
2468 /* This is the only fatal call, since it can "corrupt" the buffer. */
2469 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2470 return FALSE;
2471
2472 return TRUE;
2473 }
2474
2475 static void
2476 add_pager_refs(struct view *view, struct line *line)
2477 {
2478 char buf[SIZEOF_STR];
2479 char *commit_id = line->data + STRING_SIZE("commit ");
2480 struct ref **refs;
2481 size_t bufpos = 0, refpos = 0;
2482 const char *sep = "Refs: ";
2483 bool is_tag = FALSE;
2484
2485 assert(line->type == LINE_COMMIT);
2486
2487 refs = get_refs(commit_id);
2488 if (!refs) {
2489 if (view == VIEW(REQ_VIEW_DIFF))
2490 goto try_add_describe_ref;
2491 return;
2492 }
2493
2494 do {
2495 struct ref *ref = refs[refpos];
2496 char *fmt = ref->tag ? "%s[%s]" :
2497 ref->remote ? "%s<%s>" : "%s%s";
2498
2499 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2500 return;
2501 sep = ", ";
2502 if (ref->tag)
2503 is_tag = TRUE;
2504 } while (refs[refpos++]->next);
2505
2506 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2507 try_add_describe_ref:
2508 /* Add <tag>-g<commit_id> "fake" reference. */
2509 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2510 return;
2511 }
2512
2513 if (bufpos == 0)
2514 return;
2515
2516 if (!realloc_lines(view, view->line_size + 1))
2517 return;
2518
2519 add_line_text(view, buf, LINE_PP_REFS);
2520 }
2521
2522 static bool
2523 pager_read(struct view *view, char *data)
2524 {
2525 struct line *line;
2526
2527 if (!data)
2528 return TRUE;
2529
2530 line = add_line_text(view, data, get_line_type(data));
2531 if (!line)
2532 return FALSE;
2533
2534 if (line->type == LINE_COMMIT &&
2535 (view == VIEW(REQ_VIEW_DIFF) ||
2536 view == VIEW(REQ_VIEW_LOG)))
2537 add_pager_refs(view, line);
2538
2539 return TRUE;
2540 }
2541
2542 static enum request
2543 pager_request(struct view *view, enum request request, struct line *line)
2544 {
2545 int split = 0;
2546
2547 if (request != REQ_ENTER)
2548 return request;
2549
2550 if (line->type == LINE_COMMIT &&
2551 (view == VIEW(REQ_VIEW_LOG) ||
2552 view == VIEW(REQ_VIEW_PAGER))) {
2553 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2554 split = 1;
2555 }
2556
2557 /* Always scroll the view even if it was split. That way
2558 * you can use Enter to scroll through the log view and
2559 * split open each commit diff. */
2560 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2561
2562 /* FIXME: A minor workaround. Scrolling the view will call report("")
2563 * but if we are scrolling a non-current view this won't properly
2564 * update the view title. */
2565 if (split)
2566 update_view_title(view);
2567
2568 return REQ_NONE;
2569 }
2570
2571 static bool
2572 pager_grep(struct view *view, struct line *line)
2573 {
2574 regmatch_t pmatch;
2575 char *text = line->data;
2576
2577 if (!*text)
2578 return FALSE;
2579
2580 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2581 return FALSE;
2582
2583 return TRUE;
2584 }
2585
2586 static void
2587 pager_select(struct view *view, struct line *line)
2588 {
2589 if (line->type == LINE_COMMIT) {
2590 char *text = line->data + STRING_SIZE("commit ");
2591
2592 if (view != VIEW(REQ_VIEW_PAGER))
2593 string_copy_rev(view->ref, text);
2594 string_copy_rev(ref_commit, text);
2595 }
2596 }
2597
2598 static struct view_ops pager_ops = {
2599 "line",
2600 NULL,
2601 pager_read,
2602 pager_draw,
2603 pager_request,
2604 pager_grep,
2605 pager_select,
2606 };
2607
2608
2609 /*
2610 * Help backend
2611 */
2612
2613 static bool
2614 help_open(struct view *view)
2615 {
2616 char buf[BUFSIZ];
2617 int lines = ARRAY_SIZE(req_info) + 2;
2618 int i;
2619
2620 if (view->lines > 0)
2621 return TRUE;
2622
2623 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2624 if (!req_info[i].request)
2625 lines++;
2626
2627 view->line = calloc(lines, sizeof(*view->line));
2628 if (!view->line)
2629 return FALSE;
2630
2631 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2632
2633 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2634 char *key;
2635
2636 if (!req_info[i].request) {
2637 add_line_text(view, "", LINE_DEFAULT);
2638 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2639 continue;
2640 }
2641
2642 key = get_key(req_info[i].request);
2643 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2644 continue;
2645
2646 add_line_text(view, buf, LINE_DEFAULT);
2647 }
2648
2649 return TRUE;
2650 }
2651
2652 static struct view_ops help_ops = {
2653 "line",
2654 help_open,
2655 NULL,
2656 pager_draw,
2657 pager_request,
2658 pager_grep,
2659 pager_select,
2660 };
2661
2662
2663 /*
2664 * Tree backend
2665 */
2666
2667 struct tree_stack_entry {
2668 struct tree_stack_entry *prev; /* Entry below this in the stack */
2669 unsigned long lineno; /* Line number to restore */
2670 char *name; /* Position of name in opt_path */
2671 };
2672
2673 /* The top of the path stack. */
2674 static struct tree_stack_entry *tree_stack = NULL;
2675 unsigned long tree_lineno = 0;
2676
2677 static void
2678 pop_tree_stack_entry(void)
2679 {
2680 struct tree_stack_entry *entry = tree_stack;
2681
2682 tree_lineno = entry->lineno;
2683 entry->name[0] = 0;
2684 tree_stack = entry->prev;
2685 free(entry);
2686 }
2687
2688 static void
2689 push_tree_stack_entry(char *name, unsigned long lineno)
2690 {
2691 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
2692 size_t pathlen = strlen(opt_path);
2693
2694 if (!entry)
2695 return;
2696
2697 entry->prev = tree_stack;
2698 entry->name = opt_path + pathlen;
2699 tree_stack = entry;
2700
2701 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
2702 pop_tree_stack_entry();
2703 return;
2704 }
2705
2706 /* Move the current line to the first tree entry. */
2707 tree_lineno = 1;
2708 entry->lineno = lineno;
2709 }
2710
2711 /* Parse output from git-ls-tree(1):
2712 *
2713 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2714 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2715 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2716 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2717 */
2718
2719 #define SIZEOF_TREE_ATTR \
2720 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2721
2722 #define TREE_UP_FORMAT "040000 tree %s\t.."
2723
2724 static int
2725 tree_compare_entry(enum line_type type1, char *name1,
2726 enum line_type type2, char *name2)
2727 {
2728 if (type1 != type2) {
2729 if (type1 == LINE_TREE_DIR)
2730 return -1;
2731 return 1;
2732 }
2733
2734 return strcmp(name1, name2);
2735 }
2736
2737 static bool
2738 tree_read(struct view *view, char *text)
2739 {
2740 size_t textlen = text ? strlen(text) : 0;
2741 char buf[SIZEOF_STR];
2742 unsigned long pos;
2743 enum line_type type;
2744 bool first_read = view->lines == 0;
2745
2746 if (textlen <= SIZEOF_TREE_ATTR)
2747 return FALSE;
2748
2749 type = text[STRING_SIZE("100644 ")] == 't'
2750 ? LINE_TREE_DIR : LINE_TREE_FILE;
2751
2752 if (first_read) {
2753 /* Add path info line */
2754 if (!string_format(buf, "Directory path /%s", opt_path) ||
2755 !realloc_lines(view, view->line_size + 1) ||
2756 !add_line_text(view, buf, LINE_DEFAULT))
2757 return FALSE;
2758
2759 /* Insert "link" to parent directory. */
2760 if (*opt_path) {
2761 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
2762 !realloc_lines(view, view->line_size + 1) ||
2763 !add_line_text(view, buf, LINE_TREE_DIR))
2764 return FALSE;
2765 }
2766 }
2767
2768 /* Strip the path part ... */
2769 if (*opt_path) {
2770 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2771 size_t striplen = strlen(opt_path);
2772 char *path = text + SIZEOF_TREE_ATTR;
2773
2774 if (pathlen > striplen)
2775 memmove(path, path + striplen,
2776 pathlen - striplen + 1);
2777 }
2778
2779 /* Skip "Directory ..." and ".." line. */
2780 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2781 struct line *line = &view->line[pos];
2782 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2783 char *path2 = text + SIZEOF_TREE_ATTR;
2784 int cmp = tree_compare_entry(line->type, path1, type, path2);
2785
2786 if (cmp <= 0)
2787 continue;
2788
2789 text = strdup(text);
2790 if (!text)
2791 return FALSE;
2792
2793 if (view->lines > pos)
2794 memmove(&view->line[pos + 1], &view->line[pos],
2795 (view->lines - pos) * sizeof(*line));
2796
2797 line = &view->line[pos];
2798 line->data = text;
2799 line->type = type;
2800 view->lines++;
2801 return TRUE;
2802 }
2803
2804 if (!add_line_text(view, text, type))
2805 return FALSE;
2806
2807 if (tree_lineno > view->lineno) {
2808 view->lineno = tree_lineno;
2809 tree_lineno = 0;
2810 }
2811
2812 return TRUE;
2813 }
2814
2815 static enum request
2816 tree_request(struct view *view, enum request request, struct line *line)
2817 {
2818 enum open_flags flags;
2819
2820 if (request != REQ_ENTER)
2821 return request;
2822
2823 /* Cleanup the stack if the tree view is at a different tree. */
2824 while (!*opt_path && tree_stack)
2825 pop_tree_stack_entry();
2826
2827 switch (line->type) {
2828 case LINE_TREE_DIR:
2829 /* Depending on whether it is a subdir or parent (updir?) link
2830 * mangle the path buffer. */
2831 if (line == &view->line[1] && *opt_path) {
2832 pop_tree_stack_entry();
2833
2834 } else {
2835 char *data = line->data;
2836 char *basename = data + SIZEOF_TREE_ATTR;
2837
2838 push_tree_stack_entry(basename, view->lineno);
2839 }
2840
2841 /* Trees and subtrees share the same ID, so they are not not
2842 * unique like blobs. */
2843 flags = OPEN_RELOAD;
2844 request = REQ_VIEW_TREE;
2845 break;
2846
2847 case LINE_TREE_FILE:
2848 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2849 request = REQ_VIEW_BLOB;
2850 break;
2851
2852 default:
2853 return TRUE;
2854 }
2855
2856 open_view(view, request, flags);
2857 if (request == REQ_VIEW_TREE) {
2858 view->lineno = tree_lineno;
2859 }
2860
2861 return REQ_NONE;
2862 }
2863
2864 static void
2865 tree_select(struct view *view, struct line *line)
2866 {
2867 char *text = line->data + STRING_SIZE("100644 blob ");
2868
2869 if (line->type == LINE_TREE_FILE) {
2870 string_copy_rev(ref_blob, text);
2871
2872 } else if (line->type != LINE_TREE_DIR) {
2873 return;
2874 }
2875
2876 string_copy_rev(view->ref, text);
2877 }
2878
2879 static struct view_ops tree_ops = {
2880 "file",
2881 NULL,
2882 tree_read,
2883 pager_draw,
2884 tree_request,
2885 pager_grep,
2886 tree_select,
2887 };
2888
2889 static bool
2890 blob_read(struct view *view, char *line)
2891 {
2892 return add_line_text(view, line, LINE_DEFAULT) != NULL;
2893 }
2894
2895 static struct view_ops blob_ops = {
2896 "line",
2897 NULL,
2898 blob_read,
2899 pager_draw,
2900 pager_request,
2901 pager_grep,
2902 pager_select,
2903 };
2904
2905
2906 /*
2907 * Status backend
2908 */
2909
2910 struct status {
2911 char status;
2912 struct {
2913 mode_t mode;
2914 char rev[SIZEOF_REV];
2915 } old;
2916 struct {
2917 mode_t mode;
2918 char rev[SIZEOF_REV];
2919 } new;
2920 char name[SIZEOF_STR];
2921 };
2922
2923 static struct status stage_status;
2924 static enum line_type stage_line_type;
2925
2926 /* Get fields from the diff line:
2927 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
2928 */
2929 static inline bool
2930 status_get_diff(struct status *file, char *buf, size_t bufsize)
2931 {
2932 char *old_mode = buf + 1;
2933 char *new_mode = buf + 8;
2934 char *old_rev = buf + 15;
2935 char *new_rev = buf + 56;
2936 char *status = buf + 97;
2937
2938 if (bufsize != 99 ||
2939 old_mode[-1] != ':' ||
2940 new_mode[-1] != ' ' ||
2941 old_rev[-1] != ' ' ||
2942 new_rev[-1] != ' ' ||
2943 status[-1] != ' ')
2944 return FALSE;
2945
2946 file->status = *status;
2947
2948 string_copy_rev(file->old.rev, old_rev);
2949 string_copy_rev(file->new.rev, new_rev);
2950
2951 file->old.mode = strtoul(old_mode, NULL, 8);
2952 file->new.mode = strtoul(new_mode, NULL, 8);
2953
2954 file->name[0] = 0;
2955
2956 return TRUE;
2957 }
2958
2959 static bool
2960 status_run(struct view *view, const char cmd[], bool diff, enum line_type type)
2961 {
2962 struct status *file = NULL;
2963 char buf[SIZEOF_STR * 4];
2964 size_t bufsize = 0;
2965 FILE *pipe;
2966
2967 pipe = popen(cmd, "r");
2968 if (!pipe)
2969 return FALSE;
2970
2971 add_line_data(view, NULL, type);
2972
2973 while (!feof(pipe) && !ferror(pipe)) {
2974 char *sep;
2975 size_t readsize;
2976
2977 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
2978 if (!readsize)
2979 break;
2980 bufsize += readsize;
2981
2982 /* Process while we have NUL chars. */
2983 while ((sep = memchr(buf, 0, bufsize))) {
2984 size_t sepsize = sep - buf + 1;
2985
2986 if (!file) {
2987 if (!realloc_lines(view, view->line_size + 1))
2988 goto error_out;
2989
2990 file = calloc(1, sizeof(*file));
2991 if (!file)
2992 goto error_out;
2993
2994 add_line_data(view, file, type);
2995 }
2996
2997 /* Parse diff info part. */
2998 if (!diff) {
2999 file->status = '?';
3000
3001 } else if (!file->status) {
3002 if (!status_get_diff(file, buf, sepsize))
3003 goto error_out;
3004
3005 bufsize -= sepsize;
3006 memmove(buf, sep + 1, bufsize);
3007
3008 sep = memchr(buf, 0, bufsize);
3009 if (!sep)
3010 break;
3011 sepsize = sep - buf + 1;
3012 }
3013
3014 /* git-ls-files just delivers a NUL separated
3015 * list of file names similar to the second half
3016 * of the git-diff-* output. */
3017 string_ncopy(file->name, buf, sepsize);
3018 bufsize -= sepsize;
3019 memmove(buf, sep + 1, bufsize);
3020 file = NULL;
3021 }
3022 }
3023
3024 if (ferror(pipe)) {
3025 error_out:
3026 pclose(pipe);
3027 return FALSE;
3028 }
3029
3030 if (!view->line[view->lines - 1].data)
3031 add_line_data(view, NULL, LINE_STAT_NONE);
3032
3033 pclose(pipe);
3034 return TRUE;
3035 }
3036
3037 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --cached HEAD"
3038 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
3039 #define STATUS_LIST_OTHER_CMD \
3040 "git ls-files -z --others --exclude-per-directory=.gitignore"
3041
3042 #define STATUS_DIFF_SHOW_CMD \
3043 "git diff --root --patch-with-stat --find-copies-harder -B -C %s -- %s 2>/dev/null"
3044
3045 /* First parse staged info using git-diff-index(1), then parse unstaged
3046 * info using git-diff-files(1), and finally untracked files using
3047 * git-ls-files(1). */
3048 static bool
3049 status_open(struct view *view)
3050 {
3051 struct stat statbuf;
3052 char exclude[SIZEOF_STR];
3053 char cmd[SIZEOF_STR];
3054 size_t i;
3055
3056 for (i = 0; i < view->lines; i++)
3057 free(view->line[i].data);
3058 free(view->line);
3059 view->lines = view->line_size = 0;
3060 view->line = NULL;
3061
3062 if (!realloc_lines(view, view->line_size + 6))
3063 return FALSE;
3064
3065 if (!string_format(exclude, "%s/info/exclude", opt_git_dir))
3066 return FALSE;
3067
3068 string_copy(cmd, STATUS_LIST_OTHER_CMD);
3069
3070 if (stat(exclude, &statbuf) >= 0) {
3071 size_t cmdsize = strlen(cmd);
3072
3073 if (!string_format_from(cmd, &cmdsize, " %s", "--exclude-from=") ||
3074 sq_quote(cmd, cmdsize, exclude) >= sizeof(cmd))
3075 return FALSE;
3076 }
3077
3078 if (!status_run(view, STATUS_DIFF_INDEX_CMD, TRUE, LINE_STAT_STAGED) ||
3079 !status_run(view, STATUS_DIFF_FILES_CMD, TRUE, LINE_STAT_UNSTAGED) ||
3080 !status_run(view, cmd, FALSE, LINE_STAT_UNTRACKED))
3081 return FALSE;
3082
3083 return TRUE;
3084 }
3085
3086 static bool
3087 status_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3088 {
3089 struct status *status = line->data;
3090
3091 wmove(view->win, lineno, 0);
3092
3093 if (selected) {
3094 wattrset(view->win, get_line_attr(LINE_CURSOR));
3095 wchgat(view->win, -1, 0, LINE_CURSOR, NULL);
3096
3097 } else if (!status && line->type != LINE_STAT_NONE) {
3098 wattrset(view->win, get_line_attr(LINE_STAT_SECTION));
3099 wchgat(view->win, -1, 0, LINE_STAT_SECTION, NULL);
3100
3101 } else {
3102 wattrset(view->win, get_line_attr(line->type));
3103 }
3104
3105 if (!status) {
3106 char *text;
3107
3108 switch (line->type) {
3109 case LINE_STAT_STAGED:
3110 text = "Changes to be committed:";
3111 break;
3112
3113 case LINE_STAT_UNSTAGED:
3114 text = "Changed but not updated:";
3115 break;
3116
3117 case LINE_STAT_UNTRACKED:
3118 text = "Untracked files:";
3119 break;
3120
3121 case LINE_STAT_NONE:
3122 text = " (no files)";
3123 break;
3124
3125 default:
3126 return FALSE;
3127 }
3128
3129 waddstr(view->win, text);
3130 return TRUE;
3131 }
3132
3133 waddch(view->win, status->status);
3134 if (!selected)
3135 wattrset(view->win, A_NORMAL);
3136 wmove(view->win, lineno, 4);
3137 waddstr(view->win, status->name);
3138
3139 return TRUE;
3140 }
3141
3142 static enum request
3143 status_enter(struct view *view, struct line *line)
3144 {
3145 struct status *status = line->data;
3146 char path[SIZEOF_STR] = "";
3147 char *info;
3148 size_t cmdsize = 0;
3149
3150 if (line->type == LINE_STAT_NONE ||
3151 (!status && line[1].type == LINE_STAT_NONE)) {
3152 report("No file to diff");
3153 return REQ_NONE;
3154 }
3155
3156 if (status && sq_quote(path, 0, status->name) >= sizeof(path))
3157 return REQ_QUIT;
3158
3159 if (opt_cdup[0] &&
3160 line->type != LINE_STAT_UNTRACKED &&
3161 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
3162 return REQ_QUIT;
3163
3164 switch (line->type) {
3165 case LINE_STAT_STAGED:
3166 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3167 "--cached", path))
3168 return REQ_QUIT;
3169 if (status)
3170 info = "Staged changes to %s";
3171 else
3172 info = "Staged changes";
3173 break;
3174
3175 case LINE_STAT_UNSTAGED:
3176 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3177 "", path))
3178 return REQ_QUIT;
3179 if (status)
3180 info = "Unstaged changes to %s";
3181 else
3182 info = "Unstaged changes";
3183 break;
3184
3185 case LINE_STAT_UNTRACKED:
3186 if (opt_pipe)
3187 return REQ_QUIT;
3188
3189
3190 if (!status) {
3191 report("No file to show");
3192 return REQ_NONE;
3193 }
3194
3195 opt_pipe = fopen(status->name, "r");
3196 info = "Untracked file %s";
3197 break;
3198
3199 default:
3200 die("w00t");
3201 }
3202
3203 open_view(view, REQ_VIEW_STAGE, OPEN_RELOAD | OPEN_SPLIT);
3204 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
3205 if (status) {
3206 stage_status = *status;
3207 } else {
3208 memset(&stage_status, 0, sizeof(stage_status));
3209 }
3210
3211 stage_line_type = line->type;
3212 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.name);
3213 }
3214
3215 return REQ_NONE;
3216 }
3217
3218
3219 static bool
3220 status_update_file(struct view *view, struct status *status, enum line_type type)
3221 {
3222 char cmd[SIZEOF_STR];
3223 char buf[SIZEOF_STR];
3224 size_t cmdsize = 0;
3225 size_t bufsize = 0;
3226 size_t written = 0;
3227 FILE *pipe;
3228
3229 if (opt_cdup[0] &&
3230 type != LINE_STAT_UNTRACKED &&
3231 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3232 return FALSE;
3233
3234 switch (type) {
3235 case LINE_STAT_STAGED:
3236 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
3237 status->old.mode,
3238 status->old.rev,
3239 status->name, 0))
3240 return FALSE;
3241
3242 string_add(cmd, cmdsize, "git update-index -z --index-info");
3243 break;
3244
3245 case LINE_STAT_UNSTAGED:
3246 case LINE_STAT_UNTRACKED:
3247 if (!string_format_from(buf, &bufsize, "%s%c", status->name, 0))
3248 return FALSE;
3249
3250 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
3251 break;
3252
3253 default:
3254 die("w00t");
3255 }
3256
3257 pipe = popen(cmd, "w");
3258 if (!pipe)
3259 return FALSE;
3260
3261 while (!ferror(pipe) && written < bufsize) {
3262 written += fwrite(buf + written, 1, bufsize - written, pipe);
3263 }
3264
3265 pclose(pipe);
3266
3267 if (written != bufsize)
3268 return FALSE;
3269
3270 return TRUE;
3271 }
3272
3273 static void
3274 status_update(struct view *view)
3275 {
3276 struct line *line = &view->line[view->lineno];
3277
3278 assert(view->lines);
3279
3280 if (!line->data) {
3281 while (++line < view->line + view->lines && line->data) {
3282 if (!status_update_file(view, line->data, line->type))
3283 report("Failed to update file status");
3284 }
3285
3286 if (!line[-1].data) {
3287 report("Nothing to update");
3288 return;
3289 }
3290
3291 } else if (!status_update_file(view, line->data, line->type)) {
3292 report("Failed to update file status");
3293 }
3294
3295 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3296 }
3297
3298 static enum request
3299 status_request(struct view *view, enum request request, struct line *line)
3300 {
3301 struct status *status = line->data;
3302
3303 switch (request) {
3304 case REQ_STATUS_UPDATE:
3305 status_update(view);
3306 break;
3307
3308 case REQ_EDIT:
3309 if (!status)
3310 return request;
3311
3312 open_editor(view, status->name);
3313 break;
3314
3315 case REQ_ENTER:
3316 status_enter(view, line);
3317 break;
3318
3319 default:
3320 return request;
3321 }
3322
3323 return REQ_NONE;
3324 }
3325
3326 static void
3327 status_select(struct view *view, struct line *line)
3328 {
3329 struct status *status = line->data;
3330 char file[SIZEOF_STR] = "all files";
3331 char *text;
3332
3333 if (status && !string_format(file, "'%s'", status->name))
3334 return;
3335
3336 if (!status && line[1].type == LINE_STAT_NONE)
3337 line++;
3338
3339 switch (line->type) {
3340 case LINE_STAT_STAGED:
3341 text = "Press %s to unstage %s for commit";
3342 break;
3343
3344 case LINE_STAT_UNSTAGED:
3345 text = "Press %s to stage %s for commit";
3346 break;
3347
3348 case LINE_STAT_UNTRACKED:
3349 text = "Press %s to stage %s for addition";
3350 break;
3351
3352 case LINE_STAT_NONE:
3353 text = "Nothing to update";
3354 break;
3355
3356 default:
3357 die("w00t");
3358 }
3359
3360 string_format(view->ref, text, get_key(REQ_STATUS_UPDATE), file);
3361 }
3362
3363 static bool
3364 status_grep(struct view *view, struct line *line)
3365 {
3366 struct status *status = line->data;
3367 enum { S_STATUS, S_NAME, S_END } state;
3368 char buf[2] = "?";
3369 regmatch_t pmatch;
3370
3371 if (!status)
3372 return FALSE;
3373
3374 for (state = S_STATUS; state < S_END; state++) {
3375 char *text;
3376
3377 switch (state) {
3378 case S_NAME: text = status->name; break;
3379 case S_STATUS:
3380 buf[0] = status->status;
3381 text = buf;
3382 break;
3383
3384 default:
3385 return FALSE;
3386 }
3387
3388 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3389 return TRUE;
3390 }
3391
3392 return FALSE;
3393 }
3394
3395 static struct view_ops status_ops = {
3396 "file",
3397 status_open,
3398 NULL,
3399 status_draw,
3400 status_request,
3401 status_grep,
3402 status_select,
3403 };
3404
3405
3406 static bool
3407 stage_diff_line(FILE *pipe, struct line *line)
3408 {
3409 char *buf = line->data;
3410 size_t bufsize = strlen(buf);
3411 size_t written = 0;
3412
3413 while (!ferror(pipe) && written < bufsize) {
3414 written += fwrite(buf + written, 1, bufsize - written, pipe);
3415 }
3416
3417 fputc('\n', pipe);
3418
3419 return written == bufsize;
3420 }
3421
3422 static struct line *
3423 stage_diff_hdr(struct view *view, struct line *line)
3424 {
3425 int diff_hdr_dir = line->type == LINE_DIFF_CHUNK ? -1 : 1;
3426 struct line *diff_hdr;
3427
3428 if (line->type == LINE_DIFF_CHUNK)
3429 diff_hdr = line - 1;
3430 else
3431 diff_hdr = view->line + 1;
3432
3433 while (diff_hdr > view->line && diff_hdr < view->line + view->lines) {
3434 if (diff_hdr->type == LINE_DIFF_HEADER)
3435 return diff_hdr;
3436
3437 diff_hdr += diff_hdr_dir;
3438 }
3439
3440 return NULL;
3441 }
3442
3443 static bool
3444 stage_update_chunk(struct view *view, struct line *line)
3445 {
3446 char cmd[SIZEOF_STR];
3447 size_t cmdsize = 0;
3448 struct line *diff_hdr, *diff_chunk, *diff_end;
3449 FILE *pipe;
3450
3451 diff_hdr = stage_diff_hdr(view, line);
3452 if (!diff_hdr)
3453 return FALSE;
3454
3455 if (opt_cdup[0] &&
3456 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3457 return FALSE;
3458
3459 if (!string_format_from(cmd, &cmdsize,
3460 "git apply --cached %s - && "
3461 "git update-index -q --unmerged --refresh 2>/dev/null",
3462 stage_line_type == LINE_STAT_STAGED ? "-R" : ""))
3463 return FALSE;
3464
3465 pipe = popen(cmd, "w");
3466 if (!pipe)
3467 return FALSE;
3468
3469 diff_end = view->line + view->lines;
3470 if (line->type != LINE_DIFF_CHUNK) {
3471 diff_chunk = diff_hdr;
3472
3473 } else {
3474 for (diff_chunk = line + 1; diff_chunk < diff_end; diff_chunk++)
3475 if (diff_chunk->type == LINE_DIFF_CHUNK ||
3476 diff_chunk->type == LINE_DIFF_HEADER)
3477 diff_end = diff_chunk;
3478
3479 diff_chunk = line;
3480
3481 while (diff_hdr->type != LINE_DIFF_CHUNK) {
3482 switch (diff_hdr->type) {
3483 case LINE_DIFF_HEADER:
3484 case LINE_DIFF_INDEX:
3485 case LINE_DIFF_ADD:
3486 case LINE_DIFF_DEL:
3487 break;
3488
3489 default:
3490 diff_hdr++;
3491 continue;
3492 }
3493
3494 if (!stage_diff_line(pipe, diff_hdr++)) {
3495 pclose(pipe);
3496 return FALSE;
3497 }
3498 }
3499 }
3500
3501 while (diff_chunk < diff_end && stage_diff_line(pipe, diff_chunk))
3502 diff_chunk++;
3503
3504 pclose(pipe);
3505
3506 if (diff_chunk != diff_end)
3507 return FALSE;
3508
3509 return TRUE;
3510 }
3511
3512 static void
3513 stage_update(struct view *view, struct line *line)
3514 {
3515 if (stage_line_type != LINE_STAT_UNTRACKED &&
3516 (line->type == LINE_DIFF_CHUNK || !stage_status.status)) {
3517 if (!stage_update_chunk(view, line)) {
3518 report("Failed to apply chunk");
3519 return;
3520 }
3521
3522 } else if (!status_update_file(view, &stage_status, stage_line_type)) {
3523 report("Failed to update file");
3524 return;
3525 }
3526
3527 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3528
3529 view = VIEW(REQ_VIEW_STATUS);
3530 if (view_is_displayed(view))
3531 status_enter(view, &view->line[view->lineno]);
3532 }
3533
3534 static enum request
3535 stage_request(struct view *view, enum request request, struct line *line)
3536 {
3537 switch (request) {
3538 case REQ_STATUS_UPDATE:
3539 stage_update(view, line);
3540 break;
3541
3542 case REQ_EDIT:
3543 if (!stage_status.name[0])
3544 return request;
3545
3546 open_editor(view, stage_status.name);
3547 break;
3548
3549 case REQ_ENTER:
3550 pager_request(view, request, line);
3551 break;
3552
3553 default:
3554 return request;
3555 }
3556
3557 return REQ_NONE;
3558 }
3559
3560 static struct view_ops stage_ops = {
3561 "line",
3562 NULL,
3563 pager_read,
3564 pager_draw,
3565 stage_request,
3566 pager_grep,
3567 pager_select,
3568 };
3569
3570
3571 /*
3572 * Revision graph
3573 */
3574
3575 struct commit {
3576 char id[SIZEOF_REV]; /* SHA1 ID. */
3577 char title[128]; /* First line of the commit message. */
3578 char author[75]; /* Author of the commit. */
3579 struct tm time; /* Date from the author ident. */
3580 struct ref **refs; /* Repository references. */
3581 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
3582 size_t graph_size; /* The width of the graph array. */
3583 };
3584
3585 /* Size of rev graph with no "padding" columns */
3586 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
3587
3588 struct rev_graph {
3589 struct rev_graph *prev, *next, *parents;
3590 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
3591 size_t size;
3592 struct commit *commit;
3593 size_t pos;
3594 };
3595
3596 /* Parents of the commit being visualized. */
3597 static struct rev_graph graph_parents[4];
3598
3599 /* The current stack of revisions on the graph. */
3600 static struct rev_graph graph_stacks[4] = {
3601 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
3602 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
3603 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
3604 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
3605 };
3606
3607 static inline bool
3608 graph_parent_is_merge(struct rev_graph *graph)
3609 {
3610 return graph->parents->size > 1;
3611 }
3612
3613 static inline void
3614 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
3615 {
3616 struct commit *commit = graph->commit;
3617
3618 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
3619 commit->graph[commit->graph_size++] = symbol;
3620 }
3621
3622 static void
3623 done_rev_graph(struct rev_graph *graph)
3624 {
3625 if (graph_parent_is_merge(graph) &&
3626 graph->pos < graph->size - 1 &&
3627 graph->next->size == graph->size + graph->parents->size - 1) {
3628 size_t i = graph->pos + graph->parents->size - 1;
3629
3630 graph->commit->graph_size = i * 2;
3631 while (i < graph->next->size - 1) {
3632 append_to_rev_graph(graph, ' ');
3633 append_to_rev_graph(graph, '\\');
3634 i++;
3635 }
3636 }
3637
3638 graph->size = graph->pos = 0;
3639 graph->commit = NULL;
3640 memset(graph->parents, 0, sizeof(*graph->parents));
3641 }
3642
3643 static void
3644 push_rev_graph(struct rev_graph *graph, char *parent)
3645 {
3646 int i;
3647
3648 /* "Collapse" duplicate parents lines.
3649 *
3650 * FIXME: This needs to also update update the drawn graph but
3651 * for now it just serves as a method for pruning graph lines. */
3652 for (i = 0; i < graph->size; i++)
3653 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
3654 return;
3655
3656 if (graph->size < SIZEOF_REVITEMS) {
3657 string_copy_rev(graph->rev[graph->size++], parent);
3658 }
3659 }
3660
3661 static chtype
3662 get_rev_graph_symbol(struct rev_graph *graph)
3663 {
3664 chtype symbol;
3665
3666 if (graph->parents->size == 0)
3667 symbol = REVGRAPH_INIT;
3668 else if (graph_parent_is_merge(graph))
3669 symbol = REVGRAPH_MERGE;
3670 else if (graph->pos >= graph->size)
3671 symbol = REVGRAPH_BRANCH;
3672 else
3673 symbol = REVGRAPH_COMMIT;
3674
3675 return symbol;
3676 }
3677
3678 static void
3679 draw_rev_graph(struct rev_graph *graph)
3680 {
3681 struct rev_filler {
3682 chtype separator, line;
3683 };
3684 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
3685 static struct rev_filler fillers[] = {
3686 { ' ', REVGRAPH_LINE },
3687 { '`', '.' },
3688 { '\'', ' ' },
3689 { '/', ' ' },
3690 };
3691 chtype symbol = get_rev_graph_symbol(graph);
3692 struct rev_filler *filler;
3693 size_t i;
3694
3695 filler = &fillers[DEFAULT];
3696
3697 for (i = 0; i < graph->pos; i++) {
3698 append_to_rev_graph(graph, filler->line);
3699 if (graph_parent_is_merge(graph->prev) &&
3700 graph->prev->pos == i)
3701 filler = &fillers[RSHARP];
3702
3703 append_to_rev_graph(graph, filler->separator);
3704 }
3705
3706 /* Place the symbol for this revision. */
3707 append_to_rev_graph(graph, symbol);
3708
3709 if (graph->prev->size > graph->size)
3710 filler = &fillers[RDIAG];
3711 else
3712 filler = &fillers[DEFAULT];
3713
3714 i++;
3715
3716 for (; i < graph->size; i++) {
3717 append_to_rev_graph(graph, filler->separator);
3718 append_to_rev_graph(graph, filler->line);
3719 if (graph_parent_is_merge(graph->prev) &&
3720 i < graph->prev->pos + graph->parents->size)
3721 filler = &fillers[RSHARP];
3722 if (graph->prev->size > graph->size)
3723 filler = &fillers[LDIAG];
3724 }
3725
3726 if (graph->prev->size > graph->size) {
3727 append_to_rev_graph(graph, filler->separator);
3728 if (filler->line != ' ')
3729 append_to_rev_graph(graph, filler->line);
3730 }
3731 }
3732
3733 /* Prepare the next rev graph */
3734 static void
3735 prepare_rev_graph(struct rev_graph *graph)
3736 {
3737 size_t i;
3738
3739 /* First, traverse all lines of revisions up to the active one. */
3740 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
3741 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
3742 break;
3743
3744 push_rev_graph(graph->next, graph->rev[graph->pos]);
3745 }
3746
3747 /* Interleave the new revision parent(s). */
3748 for (i = 0; i < graph->parents->size; i++)
3749 push_rev_graph(graph->next, graph->parents->rev[i]);
3750
3751 /* Lastly, put any remaining revisions. */
3752 for (i = graph->pos + 1; i < graph->size; i++)
3753 push_rev_graph(graph->next, graph->rev[i]);
3754 }
3755
3756 static void
3757 update_rev_graph(struct rev_graph *graph)
3758 {
3759 /* If this is the finalizing update ... */
3760 if (graph->commit)
3761 prepare_rev_graph(graph);
3762
3763 /* Graph visualization needs a one rev look-ahead,
3764 * so the first update doesn't visualize anything. */
3765 if (!graph->prev->commit)
3766 return;
3767
3768 draw_rev_graph(graph->prev);
3769 done_rev_graph(graph->prev->prev);
3770 }
3771
3772
3773 /*
3774 * Main view backend
3775 */
3776
3777 static bool
3778 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3779 {
3780 char buf[DATE_COLS + 1];
3781 struct commit *commit = line->data;
3782 enum line_type type;
3783 int col = 0;
3784 size_t timelen;
3785 size_t authorlen;
3786 int trimmed = 1;
3787
3788 if (!*commit->author)
3789 return FALSE;
3790
3791 wmove(view->win, lineno, col);
3792
3793 if (selected) {
3794 type = LINE_CURSOR;
3795 wattrset(view->win, get_line_attr(type));
3796 wchgat(view->win, -1, 0, type, NULL);
3797
3798 } else {
3799 type = LINE_MAIN_COMMIT;
3800 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
3801 }
3802
3803 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
3804 waddnstr(view->win, buf, timelen);
3805 waddstr(view->win, " ");
3806
3807 col += DATE_COLS;
3808 wmove(view->win, lineno, col);
3809 if (type != LINE_CURSOR)
3810 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
3811
3812 if (opt_utf8) {
3813 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
3814 } else {
3815 authorlen = strlen(commit->author);
3816 if (authorlen > AUTHOR_COLS - 2) {
3817 authorlen = AUTHOR_COLS - 2;
3818 trimmed = 1;
3819 }
3820 }
3821
3822 if (trimmed) {
3823 waddnstr(view->win, commit->author, authorlen);
3824 if (type != LINE_CURSOR)
3825 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
3826 waddch(view->win, '~');
3827 } else {
3828 waddstr(view->win, commit->author);
3829 }
3830
3831 col += AUTHOR_COLS;
3832 if (type != LINE_CURSOR)
3833 wattrset(view->win, A_NORMAL);
3834
3835 if (opt_rev_graph && commit->graph_size) {
3836 size_t i;
3837
3838 wmove(view->win, lineno, col);
3839 /* Using waddch() instead of waddnstr() ensures that
3840 * they'll be rendered correctly for the cursor line. */
3841 for (i = 0; i < commit->graph_size; i++)
3842 waddch(view->win, commit->graph[i]);
3843
3844 waddch(view->win, ' ');
3845 col += commit->graph_size + 1;
3846 }
3847
3848 wmove(view->win, lineno, col);
3849
3850 if (commit->refs) {
3851 size_t i = 0;
3852
3853 do {
3854 if (type == LINE_CURSOR)
3855 ;
3856 else if (commit->refs[i]->tag)
3857 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
3858 else if (commit->refs[i]->remote)
3859 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
3860 else
3861 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
3862 waddstr(view->win, "[");
3863 waddstr(view->win, commit->refs[i]->name);
3864 waddstr(view->win, "]");
3865 if (type != LINE_CURSOR)
3866 wattrset(view->win, A_NORMAL);
3867 waddstr(view->win, " ");
3868 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
3869 } while (commit->refs[i++]->next);
3870 }
3871
3872 if (type != LINE_CURSOR)
3873 wattrset(view->win, get_line_attr(type));
3874
3875 {
3876 int titlelen = strlen(commit->title);
3877
3878 if (col + titlelen > view->width)
3879 titlelen = view->width - col;
3880
3881 waddnstr(view->win, commit->title, titlelen);
3882 }
3883
3884 return TRUE;
3885 }
3886
3887 /* Reads git log --pretty=raw output and parses it into the commit struct. */
3888 static bool
3889 main_read(struct view *view, char *line)
3890 {
3891 static struct rev_graph *graph = graph_stacks;
3892 enum line_type type;
3893 struct commit *commit;
3894
3895 if (!line) {
3896 update_rev_graph(graph);
3897 return TRUE;
3898 }
3899
3900 type = get_line_type(line);
3901 if (type == LINE_COMMIT) {
3902 commit = calloc(1, sizeof(struct commit));
3903 if (!commit)
3904 return FALSE;
3905
3906 string_copy_rev(commit->id, line + STRING_SIZE("commit "));
3907 commit->refs = get_refs(commit->id);
3908 graph->commit = commit;
3909 add_line_data(view, commit, LINE_MAIN_COMMIT);
3910 return TRUE;
3911 }
3912
3913 if (!view->lines)
3914 return TRUE;
3915 commit = view->line[view->lines - 1].data;
3916
3917 switch (type) {
3918 case LINE_PARENT:
3919 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
3920 break;
3921
3922 case LINE_AUTHOR:
3923 {
3924 /* Parse author lines where the name may be empty:
3925 * author <email@address.tld> 1138474660 +0100
3926 */
3927 char *ident = line + STRING_SIZE("author ");
3928 char *nameend = strchr(ident, '<');
3929 char *emailend = strchr(ident, '>');
3930
3931 if (!nameend || !emailend)
3932 break;
3933
3934 update_rev_graph(graph);
3935 graph = graph->next;
3936
3937 *nameend = *emailend = 0;
3938 ident = chomp_string(ident);
3939 if (!*ident) {
3940 ident = chomp_string(nameend + 1);
3941 if (!*ident)
3942 ident = "Unknown";
3943 }
3944
3945 string_ncopy(commit->author, ident, strlen(ident));
3946
3947 /* Parse epoch and timezone */
3948 if (emailend[1] == ' ') {
3949 char *secs = emailend + 2;
3950 char *zone = strchr(secs, ' ');
3951 time_t time = (time_t) atol(secs);
3952
3953 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3954 long tz;
3955
3956 zone++;
3957 tz = ('0' - zone[1]) * 60 * 60 * 10;
3958 tz += ('0' - zone[2]) * 60 * 60;
3959 tz += ('0' - zone[3]) * 60;
3960 tz += ('0' - zone[4]) * 60;
3961
3962 if (zone[0] == '-')
3963 tz = -tz;
3964
3965 time -= tz;
3966 }
3967
3968 gmtime_r(&time, &commit->time);
3969 }
3970 break;
3971 }
3972 default:
3973 /* Fill in the commit title if it has not already been set. */
3974 if (commit->title[0])
3975 break;
3976
3977 /* Require titles to start with a non-space character at the
3978 * offset used by git log. */
3979 if (strncmp(line, " ", 4))
3980 break;
3981 line += 4;
3982 /* Well, if the title starts with a whitespace character,
3983 * try to be forgiving. Otherwise we end up with no title. */
3984 while (isspace(*line))
3985 line++;
3986 if (*line == '\0')
3987 break;
3988 /* FIXME: More graceful handling of titles; append "..." to
3989 * shortened titles, etc. */
3990
3991 string_ncopy(commit->title, line, strlen(line));
3992 }
3993
3994 return TRUE;
3995 }
3996
3997 static void
3998 cherry_pick_commit(struct commit *commit)
3999 {
4000 char cmd[SIZEOF_STR];
4001 char *cherry_pick = getenv("TIG_CHERRY_PICK");
4002
4003 if (!cherry_pick)
4004 cherry_pick = "git cherry-pick";
4005
4006 if (string_format(cmd, "%s %s", cherry_pick, commit->id)) {
4007 def_prog_mode(); /* save current tty modes */
4008 endwin(); /* restore original tty modes */
4009 system(cmd);
4010 fprintf(stderr, "Press Enter to continue");
4011 getc(stdin);
4012 reset_prog_mode();
4013 redraw_display();
4014 }
4015 }
4016
4017 static enum request
4018 main_request(struct view *view, enum request request, struct line *line)
4019 {
4020 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4021
4022 if (request == REQ_ENTER)
4023 open_view(view, REQ_VIEW_DIFF, flags);
4024 else if (request == REQ_CHERRY_PICK)
4025 cherry_pick_commit(line->data);
4026 else
4027 return request;
4028
4029 return REQ_NONE;
4030 }
4031
4032 static bool
4033 main_grep(struct view *view, struct line *line)
4034 {
4035 struct commit *commit = line->data;
4036 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
4037 char buf[DATE_COLS + 1];
4038 regmatch_t pmatch;
4039
4040 for (state = S_TITLE; state < S_END; state++) {
4041 char *text;
4042
4043 switch (state) {
4044 case S_TITLE: text = commit->title; break;
4045 case S_AUTHOR: text = commit->author; break;
4046 case S_DATE:
4047 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
4048 continue;
4049 text = buf;
4050 break;
4051
4052 default:
4053 return FALSE;
4054 }
4055
4056 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4057 return TRUE;
4058 }
4059
4060 return FALSE;
4061 }
4062
4063 static void
4064 main_select(struct view *view, struct line *line)
4065 {
4066 struct commit *commit = line->data;
4067
4068 string_copy_rev(view->ref, commit->id);
4069 string_copy_rev(ref_commit, view->ref);
4070 }
4071
4072 static struct view_ops main_ops = {
4073 "commit",
4074 NULL,
4075 main_read,
4076 main_draw,
4077 main_request,
4078 main_grep,
4079 main_select,
4080 };
4081
4082
4083 /*
4084 * Unicode / UTF-8 handling
4085 *
4086 * NOTE: Much of the following code for dealing with unicode is derived from
4087 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
4088 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
4089 */
4090
4091 /* I've (over)annotated a lot of code snippets because I am not entirely
4092 * confident that the approach taken by this small UTF-8 interface is correct.
4093 * --jonas */
4094
4095 static inline int
4096 unicode_width(unsigned long c)
4097 {
4098 if (c >= 0x1100 &&
4099 (c <= 0x115f /* Hangul Jamo */
4100 || c == 0x2329
4101 || c == 0x232a
4102 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
4103 /* CJK ... Yi */
4104 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
4105 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
4106 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
4107 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
4108 || (c >= 0xffe0 && c <= 0xffe6)
4109 || (c >= 0x20000 && c <= 0x2fffd)
4110 || (c >= 0x30000 && c <= 0x3fffd)))
4111 return 2;
4112
4113 return 1;
4114 }
4115
4116 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
4117 * Illegal bytes are set one. */
4118 static const unsigned char utf8_bytes[256] = {
4119 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,
4120 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,
4121 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,
4122 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,
4123 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,
4124 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,
4125 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,
4126 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,
4127 };
4128
4129 /* Decode UTF-8 multi-byte representation into a unicode character. */
4130 static inline unsigned long
4131 utf8_to_unicode(const char *string, size_t length)
4132 {
4133 unsigned long unicode;
4134
4135 switch (length) {
4136 case 1:
4137 unicode = string[0];
4138 break;
4139 case 2:
4140 unicode = (string[0] & 0x1f) << 6;
4141 unicode += (string[1] & 0x3f);
4142 break;
4143 case 3:
4144 unicode = (string[0] & 0x0f) << 12;
4145 unicode += ((string[1] & 0x3f) << 6);
4146 unicode += (string[2] & 0x3f);
4147 break;
4148 case 4:
4149 unicode = (string[0] & 0x0f) << 18;
4150 unicode += ((string[1] & 0x3f) << 12);
4151 unicode += ((string[2] & 0x3f) << 6);
4152 unicode += (string[3] & 0x3f);
4153 break;
4154 case 5:
4155 unicode = (string[0] & 0x0f) << 24;
4156 unicode += ((string[1] & 0x3f) << 18);
4157 unicode += ((string[2] & 0x3f) << 12);
4158 unicode += ((string[3] & 0x3f) << 6);
4159 unicode += (string[4] & 0x3f);
4160 break;
4161 case 6:
4162 unicode = (string[0] & 0x01) << 30;
4163 unicode += ((string[1] & 0x3f) << 24);
4164 unicode += ((string[2] & 0x3f) << 18);
4165 unicode += ((string[3] & 0x3f) << 12);
4166 unicode += ((string[4] & 0x3f) << 6);
4167 unicode += (string[5] & 0x3f);
4168 break;
4169 default:
4170 die("Invalid unicode length");
4171 }
4172
4173 /* Invalid characters could return the special 0xfffd value but NUL
4174 * should be just as good. */
4175 return unicode > 0xffff ? 0 : unicode;
4176 }
4177
4178 /* Calculates how much of string can be shown within the given maximum width
4179 * and sets trimmed parameter to non-zero value if all of string could not be
4180 * shown.
4181 *
4182 * Additionally, adds to coloffset how many many columns to move to align with
4183 * the expected position. Takes into account how multi-byte and double-width
4184 * characters will effect the cursor position.
4185 *
4186 * Returns the number of bytes to output from string to satisfy max_width. */
4187 static size_t
4188 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
4189 {
4190 const char *start = string;
4191 const char *end = strchr(string, '\0');
4192 size_t mbwidth = 0;
4193 size_t width = 0;
4194
4195 *trimmed = 0;
4196
4197 while (string < end) {
4198 int c = *(unsigned char *) string;
4199 unsigned char bytes = utf8_bytes[c];
4200 size_t ucwidth;
4201 unsigned long unicode;
4202
4203 if (string + bytes > end)
4204 break;
4205
4206 /* Change representation to figure out whether
4207 * it is a single- or double-width character. */
4208
4209 unicode = utf8_to_unicode(string, bytes);
4210 /* FIXME: Graceful handling of invalid unicode character. */
4211 if (!unicode)
4212 break;
4213
4214 ucwidth = unicode_width(unicode);
4215 width += ucwidth;
4216 if (width > max_width) {
4217 *trimmed = 1;
4218 break;
4219 }
4220
4221 /* The column offset collects the differences between the
4222 * number of bytes encoding a character and the number of
4223 * columns will be used for rendering said character.
4224 *
4225 * So if some character A is encoded in 2 bytes, but will be
4226 * represented on the screen using only 1 byte this will and up
4227 * adding 1 to the multi-byte column offset.
4228 *
4229 * Assumes that no double-width character can be encoding in
4230 * less than two bytes. */
4231 if (bytes > ucwidth)
4232 mbwidth += bytes - ucwidth;
4233
4234 string += bytes;
4235 }
4236
4237 *coloffset += mbwidth;
4238
4239 return string - start;
4240 }
4241
4242
4243 /*
4244 * Status management
4245 */
4246
4247 /* Whether or not the curses interface has been initialized. */
4248 static bool cursed = FALSE;
4249
4250 /* The status window is used for polling keystrokes. */
4251 static WINDOW *status_win;
4252
4253 static bool status_empty = TRUE;
4254
4255 /* Update status and title window. */
4256 static void
4257 report(const char *msg, ...)
4258 {
4259 struct view *view = display[current_view];
4260
4261 if (input_mode)
4262 return;
4263
4264 if (!status_empty || *msg) {
4265 va_list args;
4266
4267 va_start(args, msg);
4268
4269 wmove(status_win, 0, 0);
4270 if (*msg) {
4271 vwprintw(status_win, msg, args);
4272 status_empty = FALSE;
4273 } else {
4274 status_empty = TRUE;
4275 }
4276 wclrtoeol(status_win);
4277 wrefresh(status_win);
4278
4279 va_end(args);
4280 }
4281
4282 update_view_title(view);
4283 update_display_cursor(view);
4284 }
4285
4286 /* Controls when nodelay should be in effect when polling user input. */
4287 static void
4288 set_nonblocking_input(bool loading)
4289 {
4290 static unsigned int loading_views;
4291
4292 if ((loading == FALSE && loading_views-- == 1) ||
4293 (loading == TRUE && loading_views++ == 0))
4294 nodelay(status_win, loading);
4295 }
4296
4297 static void
4298 init_display(void)
4299 {
4300 int x, y;
4301
4302 /* Initialize the curses library */
4303 if (isatty(STDIN_FILENO)) {
4304 cursed = !!initscr();
4305 } else {
4306 /* Leave stdin and stdout alone when acting as a pager. */
4307 FILE *io = fopen("/dev/tty", "r+");
4308
4309 if (!io)
4310 die("Failed to open /dev/tty");
4311 cursed = !!newterm(NULL, io, io);
4312 }
4313
4314 if (!cursed)
4315 die("Failed to initialize curses");
4316
4317 nonl(); /* Tell curses not to do NL->CR/NL on output */
4318 cbreak(); /* Take input chars one at a time, no wait for \n */
4319 noecho(); /* Don't echo input */
4320 leaveok(stdscr, TRUE);
4321
4322 if (has_colors())
4323 init_colors();
4324
4325 getmaxyx(stdscr, y, x);
4326 status_win = newwin(1, 0, y - 1, 0);
4327 if (!status_win)
4328 die("Failed to create status window");
4329
4330 /* Enable keyboard mapping */
4331 keypad(status_win, TRUE);
4332 wbkgdset(status_win, get_line_attr(LINE_STATUS));
4333 }
4334
4335 static char *
4336 read_prompt(const char *prompt)
4337 {
4338 enum { READING, STOP, CANCEL } status = READING;
4339 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
4340 int pos = 0;
4341
4342 while (status == READING) {
4343 struct view *view;
4344 int i, key;
4345
4346 input_mode = TRUE;
4347
4348 foreach_view (view, i)
4349 update_view(view);
4350
4351 input_mode = FALSE;
4352
4353 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
4354 wclrtoeol(status_win);
4355
4356 /* Refresh, accept single keystroke of input */
4357 key = wgetch(status_win);
4358 switch (key) {
4359 case KEY_RETURN:
4360 case KEY_ENTER:
4361 case '\n':
4362 status = pos ? STOP : CANCEL;
4363 break;
4364
4365 case KEY_BACKSPACE:
4366 if (pos > 0)
4367 pos--;
4368 else
4369 status = CANCEL;
4370 break;
4371
4372 case KEY_ESC:
4373 status = CANCEL;
4374 break;
4375
4376 case ERR:
4377 break;
4378
4379 default:
4380 if (pos >= sizeof(buf)) {
4381 report("Input string too long");
4382 return NULL;
4383 }
4384
4385 if (isprint(key))
4386 buf[pos++] = (char) key;
4387 }
4388 }
4389
4390 /* Clear the status window */
4391 status_empty = FALSE;
4392 report("");
4393
4394 if (status == CANCEL)
4395 return NULL;
4396
4397 buf[pos++] = 0;
4398
4399 return buf;
4400 }
4401
4402 /*
4403 * Repository references
4404 */
4405
4406 static struct ref *refs;
4407 static size_t refs_size;
4408
4409 /* Id <-> ref store */
4410 static struct ref ***id_refs;
4411 static size_t id_refs_size;
4412
4413 static struct ref **
4414 get_refs(char *id)
4415 {
4416 struct ref ***tmp_id_refs;
4417 struct ref **ref_list = NULL;
4418 size_t ref_list_size = 0;
4419 size_t i;
4420
4421 for (i = 0; i < id_refs_size; i++)
4422 if (!strcmp(id, id_refs[i][0]->id))
4423 return id_refs[i];
4424
4425 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
4426 if (!tmp_id_refs)
4427 return NULL;
4428
4429 id_refs = tmp_id_refs;
4430
4431 for (i = 0; i < refs_size; i++) {
4432 struct ref **tmp;
4433
4434 if (strcmp(id, refs[i].id))
4435 continue;
4436
4437 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
4438 if (!tmp) {
4439 if (ref_list)
4440 free(ref_list);
4441 return NULL;
4442 }
4443
4444 ref_list = tmp;
4445 if (ref_list_size > 0)
4446 ref_list[ref_list_size - 1]->next = 1;
4447 ref_list[ref_list_size] = &refs[i];
4448
4449 /* XXX: The properties of the commit chains ensures that we can
4450 * safely modify the shared ref. The repo references will
4451 * always be similar for the same id. */
4452 ref_list[ref_list_size]->next = 0;
4453 ref_list_size++;
4454 }
4455
4456 if (ref_list)
4457 id_refs[id_refs_size++] = ref_list;
4458
4459 return ref_list;
4460 }
4461
4462 static int
4463 read_ref(char *id, size_t idlen, char *name, size_t namelen)
4464 {
4465 struct ref *ref;
4466 bool tag = FALSE;
4467 bool remote = FALSE;
4468
4469 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
4470 /* Commits referenced by tags has "^{}" appended. */
4471 if (name[namelen - 1] != '}')
4472 return OK;
4473
4474 while (namelen > 0 && name[namelen] != '^')
4475 namelen--;
4476
4477 tag = TRUE;
4478 namelen -= STRING_SIZE("refs/tags/");
4479 name += STRING_SIZE("refs/tags/");
4480
4481 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
4482 remote = TRUE;
4483 namelen -= STRING_SIZE("refs/remotes/");
4484 name += STRING_SIZE("refs/remotes/");
4485
4486 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
4487 namelen -= STRING_SIZE("refs/heads/");
4488 name += STRING_SIZE("refs/heads/");
4489
4490 } else if (!strcmp(name, "HEAD")) {
4491 return OK;
4492 }
4493
4494 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
4495 if (!refs)
4496 return ERR;
4497
4498 ref = &refs[refs_size++];
4499 ref->name = malloc(namelen + 1);
4500 if (!ref->name)
4501 return ERR;
4502
4503 strncpy(ref->name, name, namelen);
4504 ref->name[namelen] = 0;
4505 ref->tag = tag;
4506 ref->remote = remote;
4507 string_copy_rev(ref->id, id);
4508
4509 return OK;
4510 }
4511
4512 static int
4513 load_refs(void)
4514 {
4515 const char *cmd_env = getenv("TIG_LS_REMOTE");
4516 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
4517
4518 return read_properties(popen(cmd, "r"), "\t", read_ref);
4519 }
4520
4521 static int
4522 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
4523 {
4524 if (!strcmp(name, "i18n.commitencoding"))
4525 string_ncopy(opt_encoding, value, valuelen);
4526
4527 if (!strcmp(name, "core.editor"))
4528 string_ncopy(opt_editor, value, valuelen);
4529
4530 return OK;
4531 }
4532
4533 static int
4534 load_repo_config(void)
4535 {
4536 return read_properties(popen(GIT_CONFIG " --list", "r"),
4537 "=", read_repo_config_option);
4538 }
4539
4540 static int
4541 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
4542 {
4543 if (!opt_git_dir[0])
4544 string_ncopy(opt_git_dir, name, namelen);
4545 else
4546 string_ncopy(opt_cdup, name, namelen);
4547 return OK;
4548 }
4549
4550 /* XXX: The line outputted by "--show-cdup" can be empty so the option
4551 * must be the last one! */
4552 static int
4553 load_repo_info(void)
4554 {
4555 return read_properties(popen("git rev-parse --git-dir --show-cdup 2>/dev/null", "r"),
4556 "=", read_repo_info);
4557 }
4558
4559 static int
4560 read_properties(FILE *pipe, const char *separators,
4561 int (*read_property)(char *, size_t, char *, size_t))
4562 {
4563 char buffer[BUFSIZ];
4564 char *name;
4565 int state = OK;
4566
4567 if (!pipe)
4568 return ERR;
4569
4570 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4571 char *value;
4572 size_t namelen;
4573 size_t valuelen;
4574
4575 name = chomp_string(name);
4576 namelen = strcspn(name, separators);
4577
4578 if (name[namelen]) {
4579 name[namelen] = 0;
4580 value = chomp_string(name + namelen + 1);
4581 valuelen = strlen(value);
4582
4583 } else {
4584 value = "";
4585 valuelen = 0;
4586 }
4587
4588 state = read_property(name, namelen, value, valuelen);
4589 }
4590
4591 if (state != ERR && ferror(pipe))
4592 state = ERR;
4593
4594 pclose(pipe);
4595
4596 return state;
4597 }
4598
4599
4600 /*
4601 * Main
4602 */
4603
4604 static void __NORETURN
4605 quit(int sig)
4606 {
4607 /* XXX: Restore tty modes and let the OS cleanup the rest! */
4608 if (cursed)
4609 endwin();
4610 exit(0);
4611 }
4612
4613 static void __NORETURN
4614 die(const char *err, ...)
4615 {
4616 va_list args;
4617
4618 endwin();
4619
4620 va_start(args, err);
4621 fputs("tig: ", stderr);
4622 vfprintf(stderr, err, args);
4623 fputs("\n", stderr);
4624 va_end(args);
4625
4626 exit(1);
4627 }
4628
4629 int
4630 main(int argc, char *argv[])
4631 {
4632 struct view *view;
4633 enum request request;
4634 size_t i;
4635
4636 signal(SIGINT, quit);
4637
4638 if (setlocale(LC_ALL, "")) {
4639 char *codeset = nl_langinfo(CODESET);
4640
4641 string_ncopy(opt_codeset, codeset, strlen(codeset));
4642 }
4643
4644 if (load_repo_info() == ERR)
4645 die("Failed to load repo info.");
4646
4647 if (load_options() == ERR)
4648 die("Failed to load user config.");
4649
4650 /* Load the repo config file so options can be overwritten from
4651 * the command line. */
4652 if (load_repo_config() == ERR)
4653 die("Failed to load repo config.");
4654
4655 if (!parse_options(argc, argv))
4656 return 0;
4657
4658 /* Require a git repository unless when running in pager mode. */
4659 if (!opt_git_dir[0])
4660 die("Not a git repository");
4661
4662 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
4663 opt_iconv = iconv_open(opt_codeset, opt_encoding);
4664 if (opt_iconv == ICONV_NONE)
4665 die("Failed to initialize character set conversion");
4666 }
4667
4668 if (load_refs() == ERR)
4669 die("Failed to load refs.");
4670
4671 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
4672 view->cmd_env = getenv(view->cmd_env);
4673
4674 request = opt_request;
4675
4676 init_display();
4677
4678 while (view_driver(display[current_view], request)) {
4679 int key;
4680 int i;
4681
4682 foreach_view (view, i)
4683 update_view(view);
4684
4685 /* Refresh, accept single keystroke of input */
4686 key = wgetch(status_win);
4687
4688 /* wgetch() with nodelay() enabled returns ERR when there's no
4689 * input. */
4690 if (key == ERR) {
4691 request = REQ_NONE;
4692 continue;
4693 }
4694
4695 request = get_keybinding(display[current_view]->keymap, key);
4696
4697 /* Some low-level request handling. This keeps access to
4698 * status_win restricted. */
4699 switch (request) {
4700 case REQ_PROMPT:
4701 {
4702 char *cmd = read_prompt(":");
4703
4704 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
4705 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
4706 opt_request = REQ_VIEW_DIFF;
4707 } else {
4708 opt_request = REQ_VIEW_PAGER;
4709 }
4710 break;
4711 }
4712
4713 request = REQ_NONE;
4714 break;
4715 }
4716 case REQ_SEARCH:
4717 case REQ_SEARCH_BACK:
4718 {
4719 const char *prompt = request == REQ_SEARCH
4720 ? "/" : "?";
4721 char *search = read_prompt(prompt);
4722
4723 if (search)
4724 string_ncopy(opt_search, search, strlen(search));
4725 else
4726 request = REQ_NONE;
4727 break;
4728 }
4729 case REQ_SCREEN_RESIZE:
4730 {
4731 int height, width;
4732
4733 getmaxyx(stdscr, height, width);
4734
4735 /* Resize the status view and let the view driver take
4736 * care of resizing the displayed views. */
4737 wresize(status_win, 1, width);
4738 mvwin(status_win, height - 1, 0);
4739 wrefresh(status_win);
4740 break;
4741 }
4742 default:
4743 break;
4744 }
4745 }
4746
4747 quit(0);
4748
4749 return 0;
4750 }
Full-screen terminal Git browser.