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Make keybinding reference more dynamic
[tig] / tig.c
1 /* Copyright (c) 2006 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 #ifndef VERSION
15 #define VERSION "tig-0.6.git"
16 #endif
17
18 #ifndef DEBUG
19 #define NDEBUG
20 #endif
21
22 #include <assert.h>
23 #include <errno.h>
24 #include <ctype.h>
25 #include <signal.h>
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <time.h>
32
33 #include <sys/types.h>
34 #include <regex.h>
35
36 #include <locale.h>
37 #include <langinfo.h>
38 #include <iconv.h>
39
40 #include <curses.h>
41
42 #if __GNUC__ >= 3
43 #define __NORETURN __attribute__((__noreturn__))
44 #else
45 #define __NORETURN
46 #endif
47
48 static void __NORETURN die(const char *err, ...);
49 static void report(const char *msg, ...);
50 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
51 static void set_nonblocking_input(bool loading);
52 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
53
54 #define ABS(x) ((x) >= 0 ? (x) : -(x))
55 #define MIN(x, y) ((x) < (y) ? (x) : (y))
56
57 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
58 #define STRING_SIZE(x) (sizeof(x) - 1)
59
60 #define SIZEOF_STR 1024 /* Default string size. */
61 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
62 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
63
64 /* Revision graph */
65
66 #define REVGRAPH_INIT 'I'
67 #define REVGRAPH_MERGE 'M'
68 #define REVGRAPH_BRANCH '+'
69 #define REVGRAPH_COMMIT '*'
70 #define REVGRAPH_LINE '|'
71
72 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
73
74 /* This color name can be used to refer to the default term colors. */
75 #define COLOR_DEFAULT (-1)
76
77 #define ICONV_NONE ((iconv_t) -1)
78
79 /* The format and size of the date column in the main view. */
80 #define DATE_FORMAT "%Y-%m-%d %H:%M"
81 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
82
83 #define AUTHOR_COLS 20
84
85 /* The default interval between line numbers. */
86 #define NUMBER_INTERVAL 1
87
88 #define TABSIZE 8
89
90 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
91
92 #define TIG_LS_REMOTE \
93 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
94
95 #define TIG_DIFF_CMD \
96 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
97
98 #define TIG_LOG_CMD \
99 "git log --cc --stat -n100 %s 2>/dev/null"
100
101 #define TIG_MAIN_CMD \
102 "git log --topo-order --pretty=raw %s 2>/dev/null"
103
104 #define TIG_TREE_CMD \
105 "git ls-tree %s %s"
106
107 #define TIG_BLOB_CMD \
108 "git cat-file blob %s"
109
110 /* XXX: Needs to be defined to the empty string. */
111 #define TIG_HELP_CMD ""
112 #define TIG_PAGER_CMD ""
113
114 /* Some ascii-shorthands fitted into the ncurses namespace. */
115 #define KEY_TAB '\t'
116 #define KEY_RETURN '\r'
117 #define KEY_ESC 27
118
119
120 struct ref {
121 char *name; /* Ref name; tag or head names are shortened. */
122 char id[SIZEOF_REV]; /* Commit SHA1 ID */
123 unsigned int tag:1; /* Is it a tag? */
124 unsigned int remote:1; /* Is it a remote ref? */
125 unsigned int next:1; /* For ref lists: are there more refs? */
126 };
127
128 static struct ref **get_refs(char *id);
129
130 struct int_map {
131 const char *name;
132 int namelen;
133 int value;
134 };
135
136 static int
137 set_from_int_map(struct int_map *map, size_t map_size,
138 int *value, const char *name, int namelen)
139 {
140
141 int i;
142
143 for (i = 0; i < map_size; i++)
144 if (namelen == map[i].namelen &&
145 !strncasecmp(name, map[i].name, namelen)) {
146 *value = map[i].value;
147 return OK;
148 }
149
150 return ERR;
151 }
152
153
154 /*
155 * String helpers
156 */
157
158 static inline void
159 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
160 {
161 if (srclen > dstlen - 1)
162 srclen = dstlen - 1;
163
164 strncpy(dst, src, srclen);
165 dst[srclen] = 0;
166 }
167
168 /* Shorthands for safely copying into a fixed buffer. */
169
170 #define string_copy(dst, src) \
171 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
172
173 #define string_ncopy(dst, src, srclen) \
174 string_ncopy_do(dst, sizeof(dst), src, srclen)
175
176 static char *
177 chomp_string(char *name)
178 {
179 int namelen;
180
181 while (isspace(*name))
182 name++;
183
184 namelen = strlen(name) - 1;
185 while (namelen > 0 && isspace(name[namelen]))
186 name[namelen--] = 0;
187
188 return name;
189 }
190
191 static bool
192 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
193 {
194 va_list args;
195 size_t pos = bufpos ? *bufpos : 0;
196
197 va_start(args, fmt);
198 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
199 va_end(args);
200
201 if (bufpos)
202 *bufpos = pos;
203
204 return pos >= bufsize ? FALSE : TRUE;
205 }
206
207 #define string_format(buf, fmt, args...) \
208 string_nformat(buf, sizeof(buf), NULL, fmt, args)
209
210 #define string_format_from(buf, from, fmt, args...) \
211 string_nformat(buf, sizeof(buf), from, fmt, args)
212
213 static int
214 string_enum_compare(const char *str1, const char *str2, int len)
215 {
216 size_t i;
217
218 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
219
220 /* Diff-Header == DIFF_HEADER */
221 for (i = 0; i < len; i++) {
222 if (toupper(str1[i]) == toupper(str2[i]))
223 continue;
224
225 if (string_enum_sep(str1[i]) &&
226 string_enum_sep(str2[i]))
227 continue;
228
229 return str1[i] - str2[i];
230 }
231
232 return 0;
233 }
234
235 /* Shell quoting
236 *
237 * NOTE: The following is a slightly modified copy of the git project's shell
238 * quoting routines found in the quote.c file.
239 *
240 * Help to copy the thing properly quoted for the shell safety. any single
241 * quote is replaced with '\'', any exclamation point is replaced with '\!',
242 * and the whole thing is enclosed in a
243 *
244 * E.g.
245 * original sq_quote result
246 * name ==> name ==> 'name'
247 * a b ==> a b ==> 'a b'
248 * a'b ==> a'\''b ==> 'a'\''b'
249 * a!b ==> a'\!'b ==> 'a'\!'b'
250 */
251
252 static size_t
253 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
254 {
255 char c;
256
257 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
258
259 BUFPUT('\'');
260 while ((c = *src++)) {
261 if (c == '\'' || c == '!') {
262 BUFPUT('\'');
263 BUFPUT('\\');
264 BUFPUT(c);
265 BUFPUT('\'');
266 } else {
267 BUFPUT(c);
268 }
269 }
270 BUFPUT('\'');
271
272 if (bufsize < SIZEOF_STR)
273 buf[bufsize] = 0;
274
275 return bufsize;
276 }
277
278
279 /*
280 * User requests
281 */
282
283 #define REQ_INFO \
284 /* XXX: Keep the view request first and in sync with views[]. */ \
285 REQ_GROUP("View switching") \
286 REQ_(VIEW_MAIN, "Show main view"), \
287 REQ_(VIEW_DIFF, "Show diff view"), \
288 REQ_(VIEW_LOG, "Show log view"), \
289 REQ_(VIEW_TREE, "Show tree view"), \
290 REQ_(VIEW_BLOB, "Show blob view"), \
291 REQ_(VIEW_HELP, "Show help page"), \
292 REQ_(VIEW_PAGER, "Show pager view"), \
293 \
294 REQ_GROUP("View manipulation") \
295 REQ_(ENTER, "Enter current line and scroll"), \
296 REQ_(NEXT, "Move to next"), \
297 REQ_(PREVIOUS, "Move to previous"), \
298 REQ_(VIEW_NEXT, "Move focus to next view"), \
299 REQ_(VIEW_CLOSE, "Close the current view"), \
300 REQ_(QUIT, "Close all views and quit"), \
301 \
302 REQ_GROUP("Cursor navigation") \
303 REQ_(MOVE_UP, "Move cursor one line up"), \
304 REQ_(MOVE_DOWN, "Move cursor one line down"), \
305 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
306 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
307 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
308 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
309 \
310 REQ_GROUP("Scrolling") \
311 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
312 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
313 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
314 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
315 \
316 REQ_GROUP("Searching") \
317 REQ_(SEARCH, "Search the view"), \
318 REQ_(SEARCH_BACK, "Search backwards in the view"), \
319 REQ_(FIND_NEXT, "Find next search match"), \
320 REQ_(FIND_PREV, "Find previous search match"), \
321 \
322 REQ_GROUP("Misc") \
323 REQ_(NONE, "Do nothing"), \
324 REQ_(PROMPT, "Bring up the prompt"), \
325 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
326 REQ_(SCREEN_RESIZE, "Resize the screen"), \
327 REQ_(SHOW_VERSION, "Show version information"), \
328 REQ_(STOP_LOADING, "Stop all loading views"), \
329 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
330 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
331
332
333 /* User action requests. */
334 enum request {
335 #define REQ_GROUP(help)
336 #define REQ_(req, help) REQ_##req
337
338 /* Offset all requests to avoid conflicts with ncurses getch values. */
339 REQ_OFFSET = KEY_MAX + 1,
340 REQ_INFO,
341 REQ_UNKNOWN,
342
343 #undef REQ_GROUP
344 #undef REQ_
345 };
346
347 struct request_info {
348 enum request request;
349 char *name;
350 int namelen;
351 char *help;
352 };
353
354 static struct request_info req_info[] = {
355 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
356 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
357 REQ_INFO
358 #undef REQ_GROUP
359 #undef REQ_
360 };
361
362 static enum request
363 get_request(const char *name)
364 {
365 int namelen = strlen(name);
366 int i;
367
368 for (i = 0; i < ARRAY_SIZE(req_info); i++)
369 if (req_info[i].namelen == namelen &&
370 !string_enum_compare(req_info[i].name, name, namelen))
371 return req_info[i].request;
372
373 return REQ_UNKNOWN;
374 }
375
376
377 /*
378 * Options
379 */
380
381 static const char usage[] =
382 VERSION " (" __DATE__ ")\n"
383 "\n"
384 "Usage: tig [options]\n"
385 " or: tig [options] [--] [git log options]\n"
386 " or: tig [options] log [git log options]\n"
387 " or: tig [options] diff [git diff options]\n"
388 " or: tig [options] show [git show options]\n"
389 " or: tig [options] < [git command output]\n"
390 "\n"
391 "Options:\n"
392 " -l Start up in log view\n"
393 " -d Start up in diff view\n"
394 " -n[I], --line-number[=I] Show line numbers with given interval\n"
395 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
396 " -- Mark end of tig options\n"
397 " -v, --version Show version and exit\n"
398 " -h, --help Show help message and exit\n";
399
400 /* Option and state variables. */
401 static bool opt_line_number = FALSE;
402 static bool opt_rev_graph = FALSE;
403 static int opt_num_interval = NUMBER_INTERVAL;
404 static int opt_tab_size = TABSIZE;
405 static enum request opt_request = REQ_VIEW_MAIN;
406 static char opt_cmd[SIZEOF_STR] = "";
407 static char opt_path[SIZEOF_STR] = "";
408 static FILE *opt_pipe = NULL;
409 static char opt_encoding[20] = "UTF-8";
410 static bool opt_utf8 = TRUE;
411 static char opt_codeset[20] = "UTF-8";
412 static iconv_t opt_iconv = ICONV_NONE;
413 static char opt_search[SIZEOF_STR] = "";
414
415 enum option_type {
416 OPT_NONE,
417 OPT_INT,
418 };
419
420 static bool
421 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
422 {
423 va_list args;
424 char *value = "";
425 int *number;
426
427 if (opt[0] != '-')
428 return FALSE;
429
430 if (opt[1] == '-') {
431 int namelen = strlen(name);
432
433 opt += 2;
434
435 if (strncmp(opt, name, namelen))
436 return FALSE;
437
438 if (opt[namelen] == '=')
439 value = opt + namelen + 1;
440
441 } else {
442 if (!short_name || opt[1] != short_name)
443 return FALSE;
444 value = opt + 2;
445 }
446
447 va_start(args, type);
448 if (type == OPT_INT) {
449 number = va_arg(args, int *);
450 if (isdigit(*value))
451 *number = atoi(value);
452 }
453 va_end(args);
454
455 return TRUE;
456 }
457
458 /* Returns the index of log or diff command or -1 to exit. */
459 static bool
460 parse_options(int argc, char *argv[])
461 {
462 int i;
463
464 for (i = 1; i < argc; i++) {
465 char *opt = argv[i];
466
467 if (!strcmp(opt, "log") ||
468 !strcmp(opt, "diff") ||
469 !strcmp(opt, "show")) {
470 opt_request = opt[0] == 'l'
471 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
472 break;
473 }
474
475 if (opt[0] && opt[0] != '-')
476 break;
477
478 if (!strcmp(opt, "-l")) {
479 opt_request = REQ_VIEW_LOG;
480 continue;
481 }
482
483 if (!strcmp(opt, "-d")) {
484 opt_request = REQ_VIEW_DIFF;
485 continue;
486 }
487
488 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
489 opt_line_number = TRUE;
490 continue;
491 }
492
493 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
494 opt_tab_size = MIN(opt_tab_size, TABSIZE);
495 continue;
496 }
497
498 if (check_option(opt, 'v', "version", OPT_NONE)) {
499 printf("tig version %s\n", VERSION);
500 return FALSE;
501 }
502
503 if (check_option(opt, 'h', "help", OPT_NONE)) {
504 printf(usage);
505 return FALSE;
506 }
507
508 if (!strcmp(opt, "--")) {
509 i++;
510 break;
511 }
512
513 die("unknown option '%s'\n\n%s", opt, usage);
514 }
515
516 if (!isatty(STDIN_FILENO)) {
517 opt_request = REQ_VIEW_PAGER;
518 opt_pipe = stdin;
519
520 } else if (i < argc) {
521 size_t buf_size;
522
523 if (opt_request == REQ_VIEW_MAIN)
524 /* XXX: This is vulnerable to the user overriding
525 * options required for the main view parser. */
526 string_copy(opt_cmd, "git log --pretty=raw");
527 else
528 string_copy(opt_cmd, "git");
529 buf_size = strlen(opt_cmd);
530
531 while (buf_size < sizeof(opt_cmd) && i < argc) {
532 opt_cmd[buf_size++] = ' ';
533 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
534 }
535
536 if (buf_size >= sizeof(opt_cmd))
537 die("command too long");
538
539 opt_cmd[buf_size] = 0;
540 }
541
542 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
543 opt_utf8 = FALSE;
544
545 return TRUE;
546 }
547
548
549 /*
550 * Line-oriented content detection.
551 */
552
553 #define LINE_INFO \
554 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
555 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
556 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
557 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
558 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
559 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
560 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
561 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
562 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
563 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
564 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
565 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
566 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
567 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
568 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
569 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
570 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
571 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
572 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
573 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
574 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
575 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
576 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
577 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
578 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
579 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
580 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
581 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
582 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
583 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
584 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
585 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
586 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
587 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
588 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
589 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
590 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
591 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
592 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
593 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
594 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
595 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
596
597 enum line_type {
598 #define LINE(type, line, fg, bg, attr) \
599 LINE_##type
600 LINE_INFO
601 #undef LINE
602 };
603
604 struct line_info {
605 const char *name; /* Option name. */
606 int namelen; /* Size of option name. */
607 const char *line; /* The start of line to match. */
608 int linelen; /* Size of string to match. */
609 int fg, bg, attr; /* Color and text attributes for the lines. */
610 };
611
612 static struct line_info line_info[] = {
613 #define LINE(type, line, fg, bg, attr) \
614 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
615 LINE_INFO
616 #undef LINE
617 };
618
619 static enum line_type
620 get_line_type(char *line)
621 {
622 int linelen = strlen(line);
623 enum line_type type;
624
625 for (type = 0; type < ARRAY_SIZE(line_info); type++)
626 /* Case insensitive search matches Signed-off-by lines better. */
627 if (linelen >= line_info[type].linelen &&
628 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
629 return type;
630
631 return LINE_DEFAULT;
632 }
633
634 static inline int
635 get_line_attr(enum line_type type)
636 {
637 assert(type < ARRAY_SIZE(line_info));
638 return COLOR_PAIR(type) | line_info[type].attr;
639 }
640
641 static struct line_info *
642 get_line_info(char *name, int namelen)
643 {
644 enum line_type type;
645
646 for (type = 0; type < ARRAY_SIZE(line_info); type++)
647 if (namelen == line_info[type].namelen &&
648 !string_enum_compare(line_info[type].name, name, namelen))
649 return &line_info[type];
650
651 return NULL;
652 }
653
654 static void
655 init_colors(void)
656 {
657 int default_bg = COLOR_BLACK;
658 int default_fg = COLOR_WHITE;
659 enum line_type type;
660
661 start_color();
662
663 if (use_default_colors() != ERR) {
664 default_bg = -1;
665 default_fg = -1;
666 }
667
668 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
669 struct line_info *info = &line_info[type];
670 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
671 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
672
673 init_pair(type, fg, bg);
674 }
675 }
676
677 struct line {
678 enum line_type type;
679
680 /* State flags */
681 unsigned int selected:1;
682
683 void *data; /* User data */
684 };
685
686
687 /*
688 * Keys
689 */
690
691 struct keybinding {
692 int alias;
693 enum request request;
694 struct keybinding *next;
695 };
696
697 static struct keybinding default_keybindings[] = {
698 /* View switching */
699 { 'm', REQ_VIEW_MAIN },
700 { 'd', REQ_VIEW_DIFF },
701 { 'l', REQ_VIEW_LOG },
702 { 't', REQ_VIEW_TREE },
703 { 'f', REQ_VIEW_BLOB },
704 { 'p', REQ_VIEW_PAGER },
705 { 'h', REQ_VIEW_HELP },
706
707 /* View manipulation */
708 { 'q', REQ_VIEW_CLOSE },
709 { KEY_TAB, REQ_VIEW_NEXT },
710 { KEY_RETURN, REQ_ENTER },
711 { KEY_UP, REQ_PREVIOUS },
712 { KEY_DOWN, REQ_NEXT },
713
714 /* Cursor navigation */
715 { 'k', REQ_MOVE_UP },
716 { 'j', REQ_MOVE_DOWN },
717 { KEY_HOME, REQ_MOVE_FIRST_LINE },
718 { KEY_END, REQ_MOVE_LAST_LINE },
719 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
720 { ' ', REQ_MOVE_PAGE_DOWN },
721 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
722 { 'b', REQ_MOVE_PAGE_UP },
723 { '-', REQ_MOVE_PAGE_UP },
724
725 /* Scrolling */
726 { KEY_IC, REQ_SCROLL_LINE_UP },
727 { KEY_DC, REQ_SCROLL_LINE_DOWN },
728 { 'w', REQ_SCROLL_PAGE_UP },
729 { 's', REQ_SCROLL_PAGE_DOWN },
730
731 /* Searching */
732 { '/', REQ_SEARCH },
733 { '?', REQ_SEARCH_BACK },
734 { 'n', REQ_FIND_NEXT },
735 { 'N', REQ_FIND_PREV },
736
737 /* Misc */
738 { 'Q', REQ_QUIT },
739 { 'z', REQ_STOP_LOADING },
740 { 'v', REQ_SHOW_VERSION },
741 { 'r', REQ_SCREEN_REDRAW },
742 { '.', REQ_TOGGLE_LINENO },
743 { 'g', REQ_TOGGLE_REV_GRAPH },
744 { ':', REQ_PROMPT },
745
746 /* Using the ncurses SIGWINCH handler. */
747 { KEY_RESIZE, REQ_SCREEN_RESIZE },
748 };
749
750 #define KEYMAP_INFO \
751 KEYMAP_(GENERIC), \
752 KEYMAP_(MAIN), \
753 KEYMAP_(DIFF), \
754 KEYMAP_(LOG), \
755 KEYMAP_(TREE), \
756 KEYMAP_(BLOB), \
757 KEYMAP_(PAGER), \
758 KEYMAP_(HELP) \
759
760 enum keymap {
761 #define KEYMAP_(name) KEYMAP_##name
762 KEYMAP_INFO
763 #undef KEYMAP_
764 };
765
766 static struct int_map keymap_table[] = {
767 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
768 KEYMAP_INFO
769 #undef KEYMAP_
770 };
771
772 #define set_keymap(map, name) \
773 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
774
775 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
776
777 static void
778 add_keybinding(enum keymap keymap, enum request request, int key)
779 {
780 struct keybinding *keybinding;
781
782 keybinding = calloc(1, sizeof(*keybinding));
783 if (!keybinding)
784 die("Failed to allocate keybinding");
785
786 keybinding->alias = key;
787 keybinding->request = request;
788 keybinding->next = keybindings[keymap];
789 keybindings[keymap] = keybinding;
790 }
791
792 /* Looks for a key binding first in the given map, then in the generic map, and
793 * lastly in the default keybindings. */
794 static enum request
795 get_keybinding(enum keymap keymap, int key)
796 {
797 struct keybinding *kbd;
798 int i;
799
800 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
801 if (kbd->alias == key)
802 return kbd->request;
803
804 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
805 if (kbd->alias == key)
806 return kbd->request;
807
808 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
809 if (default_keybindings[i].alias == key)
810 return default_keybindings[i].request;
811
812 return (enum request) key;
813 }
814
815
816 struct key {
817 char *name;
818 int value;
819 };
820
821 static struct key key_table[] = {
822 { "Enter", KEY_RETURN },
823 { "Space", ' ' },
824 { "Backspace", KEY_BACKSPACE },
825 { "Tab", KEY_TAB },
826 { "Escape", KEY_ESC },
827 { "Left", KEY_LEFT },
828 { "Right", KEY_RIGHT },
829 { "Up", KEY_UP },
830 { "Down", KEY_DOWN },
831 { "Insert", KEY_IC },
832 { "Delete", KEY_DC },
833 { "Hash", '#' },
834 { "Home", KEY_HOME },
835 { "End", KEY_END },
836 { "PageUp", KEY_PPAGE },
837 { "PageDown", KEY_NPAGE },
838 { "F1", KEY_F(1) },
839 { "F2", KEY_F(2) },
840 { "F3", KEY_F(3) },
841 { "F4", KEY_F(4) },
842 { "F5", KEY_F(5) },
843 { "F6", KEY_F(6) },
844 { "F7", KEY_F(7) },
845 { "F8", KEY_F(8) },
846 { "F9", KEY_F(9) },
847 { "F10", KEY_F(10) },
848 { "F11", KEY_F(11) },
849 { "F12", KEY_F(12) },
850 };
851
852 static int
853 get_key_value(const char *name)
854 {
855 int i;
856
857 for (i = 0; i < ARRAY_SIZE(key_table); i++)
858 if (!strcasecmp(key_table[i].name, name))
859 return key_table[i].value;
860
861 if (strlen(name) == 1 && isprint(*name))
862 return (int) *name;
863
864 return ERR;
865 }
866
867 static char *
868 get_key(enum request request)
869 {
870 static char buf[BUFSIZ];
871 static char key_char[] = "'X'";
872 size_t pos = 0;
873 char *sep = "";
874 int i;
875
876 buf[pos] = 0;
877
878 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
879 struct keybinding *keybinding = &default_keybindings[i];
880 char *seq = NULL;
881 int key;
882
883 if (keybinding->request != request)
884 continue;
885
886 for (key = 0; key < ARRAY_SIZE(key_table); key++)
887 if (key_table[key].value == keybinding->alias)
888 seq = key_table[key].name;
889
890 if (seq == NULL &&
891 keybinding->alias < 127 &&
892 isprint(keybinding->alias)) {
893 key_char[1] = (char) keybinding->alias;
894 seq = key_char;
895 }
896
897 if (!seq)
898 seq = "'?'";
899
900 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
901 return "Too many keybindings!";
902 sep = ", ";
903 }
904
905 return buf;
906 }
907
908
909 /*
910 * User config file handling.
911 */
912
913 static struct int_map color_map[] = {
914 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
915 COLOR_MAP(DEFAULT),
916 COLOR_MAP(BLACK),
917 COLOR_MAP(BLUE),
918 COLOR_MAP(CYAN),
919 COLOR_MAP(GREEN),
920 COLOR_MAP(MAGENTA),
921 COLOR_MAP(RED),
922 COLOR_MAP(WHITE),
923 COLOR_MAP(YELLOW),
924 };
925
926 #define set_color(color, name) \
927 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
928
929 static struct int_map attr_map[] = {
930 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
931 ATTR_MAP(NORMAL),
932 ATTR_MAP(BLINK),
933 ATTR_MAP(BOLD),
934 ATTR_MAP(DIM),
935 ATTR_MAP(REVERSE),
936 ATTR_MAP(STANDOUT),
937 ATTR_MAP(UNDERLINE),
938 };
939
940 #define set_attribute(attr, name) \
941 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
942
943 static int config_lineno;
944 static bool config_errors;
945 static char *config_msg;
946
947 /* Wants: object fgcolor bgcolor [attr] */
948 static int
949 option_color_command(int argc, char *argv[])
950 {
951 struct line_info *info;
952
953 if (argc != 3 && argc != 4) {
954 config_msg = "Wrong number of arguments given to color command";
955 return ERR;
956 }
957
958 info = get_line_info(argv[0], strlen(argv[0]));
959 if (!info) {
960 config_msg = "Unknown color name";
961 return ERR;
962 }
963
964 if (set_color(&info->fg, argv[1]) == ERR ||
965 set_color(&info->bg, argv[2]) == ERR) {
966 config_msg = "Unknown color";
967 return ERR;
968 }
969
970 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
971 config_msg = "Unknown attribute";
972 return ERR;
973 }
974
975 return OK;
976 }
977
978 /* Wants: name = value */
979 static int
980 option_set_command(int argc, char *argv[])
981 {
982 if (argc != 3) {
983 config_msg = "Wrong number of arguments given to set command";
984 return ERR;
985 }
986
987 if (strcmp(argv[1], "=")) {
988 config_msg = "No value assigned";
989 return ERR;
990 }
991
992 if (!strcmp(argv[0], "show-rev-graph")) {
993 opt_rev_graph = (!strcmp(argv[2], "1") ||
994 !strcmp(argv[2], "true") ||
995 !strcmp(argv[2], "yes"));
996 return OK;
997 }
998
999 if (!strcmp(argv[0], "line-number-interval")) {
1000 opt_num_interval = atoi(argv[2]);
1001 return OK;
1002 }
1003
1004 if (!strcmp(argv[0], "tab-size")) {
1005 opt_tab_size = atoi(argv[2]);
1006 return OK;
1007 }
1008
1009 if (!strcmp(argv[0], "commit-encoding")) {
1010 char *arg = argv[2];
1011 int delimiter = *arg;
1012 int i;
1013
1014 switch (delimiter) {
1015 case '"':
1016 case '\'':
1017 for (arg++, i = 0; arg[i]; i++)
1018 if (arg[i] == delimiter) {
1019 arg[i] = 0;
1020 break;
1021 }
1022 default:
1023 string_copy(opt_encoding, arg);
1024 return OK;
1025 }
1026 }
1027
1028 config_msg = "Unknown variable name";
1029 return ERR;
1030 }
1031
1032 /* Wants: mode request key */
1033 static int
1034 option_bind_command(int argc, char *argv[])
1035 {
1036 enum request request;
1037 int keymap;
1038 int key;
1039
1040 if (argc != 3) {
1041 config_msg = "Wrong number of arguments given to bind command";
1042 return ERR;
1043 }
1044
1045 if (set_keymap(&keymap, argv[0]) == ERR) {
1046 config_msg = "Unknown key map";
1047 return ERR;
1048 }
1049
1050 key = get_key_value(argv[1]);
1051 if (key == ERR) {
1052 config_msg = "Unknown key";
1053 return ERR;
1054 }
1055
1056 request = get_request(argv[2]);
1057 if (request == REQ_UNKNOWN) {
1058 config_msg = "Unknown request name";
1059 return ERR;
1060 }
1061
1062 add_keybinding(keymap, request, key);
1063
1064 return OK;
1065 }
1066
1067 static int
1068 set_option(char *opt, char *value)
1069 {
1070 char *argv[16];
1071 int valuelen;
1072 int argc = 0;
1073
1074 /* Tokenize */
1075 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1076 argv[argc++] = value;
1077
1078 value += valuelen;
1079 if (!*value)
1080 break;
1081
1082 *value++ = 0;
1083 while (isspace(*value))
1084 value++;
1085 }
1086
1087 if (!strcmp(opt, "color"))
1088 return option_color_command(argc, argv);
1089
1090 if (!strcmp(opt, "set"))
1091 return option_set_command(argc, argv);
1092
1093 if (!strcmp(opt, "bind"))
1094 return option_bind_command(argc, argv);
1095
1096 config_msg = "Unknown option command";
1097 return ERR;
1098 }
1099
1100 static int
1101 read_option(char *opt, int optlen, char *value, int valuelen)
1102 {
1103 int status = OK;
1104
1105 config_lineno++;
1106 config_msg = "Internal error";
1107
1108 /* Check for comment markers, since read_properties() will
1109 * only ensure opt and value are split at first " \t". */
1110 optlen = strcspn(opt, "#");
1111 if (optlen == 0)
1112 return OK;
1113
1114 if (opt[optlen] != 0) {
1115 config_msg = "No option value";
1116 status = ERR;
1117
1118 } else {
1119 /* Look for comment endings in the value. */
1120 int len = strcspn(value, "#");
1121
1122 if (len < valuelen) {
1123 valuelen = len;
1124 value[valuelen] = 0;
1125 }
1126
1127 status = set_option(opt, value);
1128 }
1129
1130 if (status == ERR) {
1131 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1132 config_lineno, optlen, opt, config_msg);
1133 config_errors = TRUE;
1134 }
1135
1136 /* Always keep going if errors are encountered. */
1137 return OK;
1138 }
1139
1140 static int
1141 load_options(void)
1142 {
1143 char *home = getenv("HOME");
1144 char buf[SIZEOF_STR];
1145 FILE *file;
1146
1147 config_lineno = 0;
1148 config_errors = FALSE;
1149
1150 if (!home || !string_format(buf, "%s/.tigrc", home))
1151 return ERR;
1152
1153 /* It's ok that the file doesn't exist. */
1154 file = fopen(buf, "r");
1155 if (!file)
1156 return OK;
1157
1158 if (read_properties(file, " \t", read_option) == ERR ||
1159 config_errors == TRUE)
1160 fprintf(stderr, "Errors while loading %s.\n", buf);
1161
1162 return OK;
1163 }
1164
1165
1166 /*
1167 * The viewer
1168 */
1169
1170 struct view;
1171 struct view_ops;
1172
1173 /* The display array of active views and the index of the current view. */
1174 static struct view *display[2];
1175 static unsigned int current_view;
1176
1177 /* Reading from the prompt? */
1178 static bool input_mode = FALSE;
1179
1180 #define foreach_displayed_view(view, i) \
1181 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1182
1183 #define displayed_views() (display[1] != NULL ? 2 : 1)
1184
1185 /* Current head and commit ID */
1186 static char ref_blob[SIZEOF_REF] = "";
1187 static char ref_commit[SIZEOF_REF] = "HEAD";
1188 static char ref_head[SIZEOF_REF] = "HEAD";
1189
1190 struct view {
1191 const char *name; /* View name */
1192 const char *cmd_fmt; /* Default command line format */
1193 const char *cmd_env; /* Command line set via environment */
1194 const char *id; /* Points to either of ref_{head,commit,blob} */
1195
1196 struct view_ops *ops; /* View operations */
1197
1198 enum keymap keymap; /* What keymap does this view have */
1199
1200 char cmd[SIZEOF_STR]; /* Command buffer */
1201 char ref[SIZEOF_REF]; /* Hovered commit reference */
1202 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1203
1204 int height, width; /* The width and height of the main window */
1205 WINDOW *win; /* The main window */
1206 WINDOW *title; /* The title window living below the main window */
1207
1208 /* Navigation */
1209 unsigned long offset; /* Offset of the window top */
1210 unsigned long lineno; /* Current line number */
1211
1212 /* Searching */
1213 char grep[SIZEOF_STR]; /* Search string */
1214 regex_t *regex; /* Pre-compiled regex */
1215
1216 /* If non-NULL, points to the view that opened this view. If this view
1217 * is closed tig will switch back to the parent view. */
1218 struct view *parent;
1219
1220 /* Buffering */
1221 unsigned long lines; /* Total number of lines */
1222 struct line *line; /* Line index */
1223 unsigned long line_size;/* Total number of allocated lines */
1224 unsigned int digits; /* Number of digits in the lines member. */
1225
1226 /* Loading */
1227 FILE *pipe;
1228 time_t start_time;
1229 };
1230
1231 struct view_ops {
1232 /* What type of content being displayed. Used in the title bar. */
1233 const char *type;
1234 /* Draw one line; @lineno must be < view->height. */
1235 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1236 /* Read one line; updates view->line. */
1237 bool (*read)(struct view *view, char *data);
1238 /* Depending on view, change display based on current line. */
1239 bool (*enter)(struct view *view, struct line *line);
1240 /* Search for regex in a line. */
1241 bool (*grep)(struct view *view, struct line *line);
1242 /* Select line */
1243 void (*select)(struct view *view, struct line *line);
1244 };
1245
1246 static struct view_ops pager_ops;
1247 static struct view_ops main_ops;
1248 static struct view_ops tree_ops;
1249 static struct view_ops blob_ops;
1250
1251 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1252 { name, cmd, #env, ref, ops, map}
1253
1254 #define VIEW_(id, name, ops, ref) \
1255 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1256
1257
1258 static struct view views[] = {
1259 VIEW_(MAIN, "main", &main_ops, ref_head),
1260 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1261 VIEW_(LOG, "log", &pager_ops, ref_head),
1262 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1263 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1264 VIEW_(HELP, "help", &pager_ops, ""),
1265 VIEW_(PAGER, "pager", &pager_ops, ""),
1266 };
1267
1268 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1269
1270 #define foreach_view(view, i) \
1271 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1272
1273 #define view_is_displayed(view) \
1274 (view == display[0] || view == display[1])
1275
1276 static bool
1277 draw_view_line(struct view *view, unsigned int lineno)
1278 {
1279 struct line *line;
1280 bool selected = (view->offset + lineno == view->lineno);
1281 bool draw_ok;
1282
1283 assert(view_is_displayed(view));
1284
1285 if (view->offset + lineno >= view->lines)
1286 return FALSE;
1287
1288 line = &view->line[view->offset + lineno];
1289
1290 if (selected) {
1291 line->selected = TRUE;
1292 view->ops->select(view, line);
1293 } else if (line->selected) {
1294 line->selected = FALSE;
1295 wmove(view->win, lineno, 0);
1296 wclrtoeol(view->win);
1297 }
1298
1299 scrollok(view->win, FALSE);
1300 draw_ok = view->ops->draw(view, line, lineno, selected);
1301 scrollok(view->win, TRUE);
1302
1303 return draw_ok;
1304 }
1305
1306 static void
1307 redraw_view_from(struct view *view, int lineno)
1308 {
1309 assert(0 <= lineno && lineno < view->height);
1310
1311 for (; lineno < view->height; lineno++) {
1312 if (!draw_view_line(view, lineno))
1313 break;
1314 }
1315
1316 redrawwin(view->win);
1317 if (input_mode)
1318 wnoutrefresh(view->win);
1319 else
1320 wrefresh(view->win);
1321 }
1322
1323 static void
1324 redraw_view(struct view *view)
1325 {
1326 wclear(view->win);
1327 redraw_view_from(view, 0);
1328 }
1329
1330
1331 static void
1332 update_view_title(struct view *view)
1333 {
1334 char buf[SIZEOF_STR];
1335 char state[SIZEOF_STR];
1336 size_t bufpos = 0, statelen = 0;
1337
1338 assert(view_is_displayed(view));
1339
1340 if (view->lines || view->pipe) {
1341 unsigned int view_lines = view->offset + view->height;
1342 unsigned int lines = view->lines
1343 ? MIN(view_lines, view->lines) * 100 / view->lines
1344 : 0;
1345
1346 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1347 view->ops->type,
1348 view->lineno + 1,
1349 view->lines,
1350 lines);
1351
1352 if (view->pipe) {
1353 time_t secs = time(NULL) - view->start_time;
1354
1355 /* Three git seconds are a long time ... */
1356 if (secs > 2)
1357 string_format_from(state, &statelen, " %lds", secs);
1358 }
1359 }
1360
1361 string_format_from(buf, &bufpos, "[%s]", view->name);
1362 if (*view->ref && bufpos < view->width) {
1363 size_t refsize = strlen(view->ref);
1364 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1365
1366 if (minsize < view->width)
1367 refsize = view->width - minsize + 7;
1368 string_format_from(buf, &bufpos, " %.*s", refsize, view->ref);
1369 }
1370
1371 if (statelen && bufpos < view->width) {
1372 string_format_from(buf, &bufpos, " %s", state);
1373 }
1374
1375 if (view == display[current_view])
1376 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1377 else
1378 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1379
1380 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1381 wclrtoeol(view->title);
1382 wmove(view->title, 0, view->width - 1);
1383
1384 if (input_mode)
1385 wnoutrefresh(view->title);
1386 else
1387 wrefresh(view->title);
1388 }
1389
1390 static void
1391 resize_display(void)
1392 {
1393 int offset, i;
1394 struct view *base = display[0];
1395 struct view *view = display[1] ? display[1] : display[0];
1396
1397 /* Setup window dimensions */
1398
1399 getmaxyx(stdscr, base->height, base->width);
1400
1401 /* Make room for the status window. */
1402 base->height -= 1;
1403
1404 if (view != base) {
1405 /* Horizontal split. */
1406 view->width = base->width;
1407 view->height = SCALE_SPLIT_VIEW(base->height);
1408 base->height -= view->height;
1409
1410 /* Make room for the title bar. */
1411 view->height -= 1;
1412 }
1413
1414 /* Make room for the title bar. */
1415 base->height -= 1;
1416
1417 offset = 0;
1418
1419 foreach_displayed_view (view, i) {
1420 if (!view->win) {
1421 view->win = newwin(view->height, 0, offset, 0);
1422 if (!view->win)
1423 die("Failed to create %s view", view->name);
1424
1425 scrollok(view->win, TRUE);
1426
1427 view->title = newwin(1, 0, offset + view->height, 0);
1428 if (!view->title)
1429 die("Failed to create title window");
1430
1431 } else {
1432 wresize(view->win, view->height, view->width);
1433 mvwin(view->win, offset, 0);
1434 mvwin(view->title, offset + view->height, 0);
1435 }
1436
1437 offset += view->height + 1;
1438 }
1439 }
1440
1441 static void
1442 redraw_display(void)
1443 {
1444 struct view *view;
1445 int i;
1446
1447 foreach_displayed_view (view, i) {
1448 redraw_view(view);
1449 update_view_title(view);
1450 }
1451 }
1452
1453 static void
1454 update_display_cursor(struct view *view)
1455 {
1456 /* Move the cursor to the right-most column of the cursor line.
1457 *
1458 * XXX: This could turn out to be a bit expensive, but it ensures that
1459 * the cursor does not jump around. */
1460 if (view->lines) {
1461 wmove(view->win, view->lineno - view->offset, view->width - 1);
1462 wrefresh(view->win);
1463 }
1464 }
1465
1466 /*
1467 * Navigation
1468 */
1469
1470 /* Scrolling backend */
1471 static void
1472 do_scroll_view(struct view *view, int lines)
1473 {
1474 bool redraw_current_line = FALSE;
1475
1476 /* The rendering expects the new offset. */
1477 view->offset += lines;
1478
1479 assert(0 <= view->offset && view->offset < view->lines);
1480 assert(lines);
1481
1482 /* Move current line into the view. */
1483 if (view->lineno < view->offset) {
1484 view->lineno = view->offset;
1485 redraw_current_line = TRUE;
1486 } else if (view->lineno >= view->offset + view->height) {
1487 view->lineno = view->offset + view->height - 1;
1488 redraw_current_line = TRUE;
1489 }
1490
1491 assert(view->offset <= view->lineno && view->lineno < view->lines);
1492
1493 /* Redraw the whole screen if scrolling is pointless. */
1494 if (view->height < ABS(lines)) {
1495 redraw_view(view);
1496
1497 } else {
1498 int line = lines > 0 ? view->height - lines : 0;
1499 int end = line + ABS(lines);
1500
1501 wscrl(view->win, lines);
1502
1503 for (; line < end; line++) {
1504 if (!draw_view_line(view, line))
1505 break;
1506 }
1507
1508 if (redraw_current_line)
1509 draw_view_line(view, view->lineno - view->offset);
1510 }
1511
1512 redrawwin(view->win);
1513 wrefresh(view->win);
1514 report("");
1515 }
1516
1517 /* Scroll frontend */
1518 static void
1519 scroll_view(struct view *view, enum request request)
1520 {
1521 int lines = 1;
1522
1523 assert(view_is_displayed(view));
1524
1525 switch (request) {
1526 case REQ_SCROLL_PAGE_DOWN:
1527 lines = view->height;
1528 case REQ_SCROLL_LINE_DOWN:
1529 if (view->offset + lines > view->lines)
1530 lines = view->lines - view->offset;
1531
1532 if (lines == 0 || view->offset + view->height >= view->lines) {
1533 report("Cannot scroll beyond the last line");
1534 return;
1535 }
1536 break;
1537
1538 case REQ_SCROLL_PAGE_UP:
1539 lines = view->height;
1540 case REQ_SCROLL_LINE_UP:
1541 if (lines > view->offset)
1542 lines = view->offset;
1543
1544 if (lines == 0) {
1545 report("Cannot scroll beyond the first line");
1546 return;
1547 }
1548
1549 lines = -lines;
1550 break;
1551
1552 default:
1553 die("request %d not handled in switch", request);
1554 }
1555
1556 do_scroll_view(view, lines);
1557 }
1558
1559 /* Cursor moving */
1560 static void
1561 move_view(struct view *view, enum request request)
1562 {
1563 int scroll_steps = 0;
1564 int steps;
1565
1566 switch (request) {
1567 case REQ_MOVE_FIRST_LINE:
1568 steps = -view->lineno;
1569 break;
1570
1571 case REQ_MOVE_LAST_LINE:
1572 steps = view->lines - view->lineno - 1;
1573 break;
1574
1575 case REQ_MOVE_PAGE_UP:
1576 steps = view->height > view->lineno
1577 ? -view->lineno : -view->height;
1578 break;
1579
1580 case REQ_MOVE_PAGE_DOWN:
1581 steps = view->lineno + view->height >= view->lines
1582 ? view->lines - view->lineno - 1 : view->height;
1583 break;
1584
1585 case REQ_MOVE_UP:
1586 steps = -1;
1587 break;
1588
1589 case REQ_MOVE_DOWN:
1590 steps = 1;
1591 break;
1592
1593 default:
1594 die("request %d not handled in switch", request);
1595 }
1596
1597 if (steps <= 0 && view->lineno == 0) {
1598 report("Cannot move beyond the first line");
1599 return;
1600
1601 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1602 report("Cannot move beyond the last line");
1603 return;
1604 }
1605
1606 /* Move the current line */
1607 view->lineno += steps;
1608 assert(0 <= view->lineno && view->lineno < view->lines);
1609
1610 /* Check whether the view needs to be scrolled */
1611 if (view->lineno < view->offset ||
1612 view->lineno >= view->offset + view->height) {
1613 scroll_steps = steps;
1614 if (steps < 0 && -steps > view->offset) {
1615 scroll_steps = -view->offset;
1616
1617 } else if (steps > 0) {
1618 if (view->lineno == view->lines - 1 &&
1619 view->lines > view->height) {
1620 scroll_steps = view->lines - view->offset - 1;
1621 if (scroll_steps >= view->height)
1622 scroll_steps -= view->height - 1;
1623 }
1624 }
1625 }
1626
1627 if (!view_is_displayed(view)) {
1628 view->offset += scroll_steps;
1629 assert(0 <= view->offset && view->offset < view->lines);
1630 view->ops->select(view, &view->line[view->lineno]);
1631 return;
1632 }
1633
1634 /* Repaint the old "current" line if we be scrolling */
1635 if (ABS(steps) < view->height)
1636 draw_view_line(view, view->lineno - steps - view->offset);
1637
1638 if (scroll_steps) {
1639 do_scroll_view(view, scroll_steps);
1640 return;
1641 }
1642
1643 /* Draw the current line */
1644 draw_view_line(view, view->lineno - view->offset);
1645
1646 redrawwin(view->win);
1647 wrefresh(view->win);
1648 report("");
1649 }
1650
1651
1652 /*
1653 * Searching
1654 */
1655
1656 static void search_view(struct view *view, enum request request);
1657
1658 static bool
1659 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1660 {
1661 assert(view_is_displayed(view));
1662
1663 if (!view->ops->grep(view, line))
1664 return FALSE;
1665
1666 if (lineno - view->offset >= view->height) {
1667 view->offset = lineno;
1668 view->lineno = lineno;
1669 redraw_view(view);
1670
1671 } else {
1672 unsigned long old_lineno = view->lineno - view->offset;
1673
1674 view->lineno = lineno;
1675 draw_view_line(view, old_lineno);
1676
1677 draw_view_line(view, view->lineno - view->offset);
1678 redrawwin(view->win);
1679 wrefresh(view->win);
1680 }
1681
1682 report("Line %ld matches '%s'", lineno + 1, view->grep);
1683 return TRUE;
1684 }
1685
1686 static void
1687 find_next(struct view *view, enum request request)
1688 {
1689 unsigned long lineno = view->lineno;
1690 int direction;
1691
1692 if (!*view->grep) {
1693 if (!*opt_search)
1694 report("No previous search");
1695 else
1696 search_view(view, request);
1697 return;
1698 }
1699
1700 switch (request) {
1701 case REQ_SEARCH:
1702 case REQ_FIND_NEXT:
1703 direction = 1;
1704 break;
1705
1706 case REQ_SEARCH_BACK:
1707 case REQ_FIND_PREV:
1708 direction = -1;
1709 break;
1710
1711 default:
1712 return;
1713 }
1714
1715 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1716 lineno += direction;
1717
1718 /* Note, lineno is unsigned long so will wrap around in which case it
1719 * will become bigger than view->lines. */
1720 for (; lineno < view->lines; lineno += direction) {
1721 struct line *line = &view->line[lineno];
1722
1723 if (find_next_line(view, lineno, line))
1724 return;
1725 }
1726
1727 report("No match found for '%s'", view->grep);
1728 }
1729
1730 static void
1731 search_view(struct view *view, enum request request)
1732 {
1733 int regex_err;
1734
1735 if (view->regex) {
1736 regfree(view->regex);
1737 *view->grep = 0;
1738 } else {
1739 view->regex = calloc(1, sizeof(*view->regex));
1740 if (!view->regex)
1741 return;
1742 }
1743
1744 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1745 if (regex_err != 0) {
1746 char buf[SIZEOF_STR] = "unknown error";
1747
1748 regerror(regex_err, view->regex, buf, sizeof(buf));
1749 report("Search failed: %s", buf);
1750 return;
1751 }
1752
1753 string_copy(view->grep, opt_search);
1754
1755 find_next(view, request);
1756 }
1757
1758 /*
1759 * Incremental updating
1760 */
1761
1762 static void
1763 end_update(struct view *view)
1764 {
1765 if (!view->pipe)
1766 return;
1767 set_nonblocking_input(FALSE);
1768 if (view->pipe == stdin)
1769 fclose(view->pipe);
1770 else
1771 pclose(view->pipe);
1772 view->pipe = NULL;
1773 }
1774
1775 static bool
1776 begin_update(struct view *view)
1777 {
1778 const char *id = view->id;
1779
1780 if (view->pipe)
1781 end_update(view);
1782
1783 if (opt_cmd[0]) {
1784 string_copy(view->cmd, opt_cmd);
1785 opt_cmd[0] = 0;
1786 /* When running random commands, initially show the
1787 * command in the title. However, it maybe later be
1788 * overwritten if a commit line is selected. */
1789 string_copy(view->ref, view->cmd);
1790
1791 } else if (view == VIEW(REQ_VIEW_TREE)) {
1792 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1793 char path[SIZEOF_STR];
1794
1795 if (strcmp(view->vid, view->id))
1796 opt_path[0] = path[0] = 0;
1797 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
1798 return FALSE;
1799
1800 if (!string_format(view->cmd, format, id, path))
1801 return FALSE;
1802
1803 } else {
1804 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1805
1806 if (!string_format(view->cmd, format, id, id, id, id, id))
1807 return FALSE;
1808
1809 /* Put the current ref_* value to the view title ref
1810 * member. This is needed by the blob view. Most other
1811 * views sets it automatically after loading because the
1812 * first line is a commit line. */
1813 string_copy(view->ref, id);
1814 }
1815
1816 /* Special case for the pager view. */
1817 if (opt_pipe) {
1818 view->pipe = opt_pipe;
1819 opt_pipe = NULL;
1820 } else {
1821 view->pipe = popen(view->cmd, "r");
1822 }
1823
1824 if (!view->pipe)
1825 return FALSE;
1826
1827 set_nonblocking_input(TRUE);
1828
1829 view->offset = 0;
1830 view->lines = 0;
1831 view->lineno = 0;
1832 string_copy(view->vid, id);
1833
1834 if (view->line) {
1835 int i;
1836
1837 for (i = 0; i < view->lines; i++)
1838 if (view->line[i].data)
1839 free(view->line[i].data);
1840
1841 free(view->line);
1842 view->line = NULL;
1843 }
1844
1845 view->start_time = time(NULL);
1846
1847 return TRUE;
1848 }
1849
1850 static struct line *
1851 realloc_lines(struct view *view, size_t line_size)
1852 {
1853 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1854
1855 if (!tmp)
1856 return NULL;
1857
1858 view->line = tmp;
1859 view->line_size = line_size;
1860 return view->line;
1861 }
1862
1863 static bool
1864 update_view(struct view *view)
1865 {
1866 char in_buffer[BUFSIZ];
1867 char out_buffer[BUFSIZ * 2];
1868 char *line;
1869 /* The number of lines to read. If too low it will cause too much
1870 * redrawing (and possible flickering), if too high responsiveness
1871 * will suffer. */
1872 unsigned long lines = view->height;
1873 int redraw_from = -1;
1874
1875 if (!view->pipe)
1876 return TRUE;
1877
1878 /* Only redraw if lines are visible. */
1879 if (view->offset + view->height >= view->lines)
1880 redraw_from = view->lines - view->offset;
1881
1882 /* FIXME: This is probably not perfect for backgrounded views. */
1883 if (!realloc_lines(view, view->lines + lines))
1884 goto alloc_error;
1885
1886 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1887 size_t linelen = strlen(line);
1888
1889 if (linelen)
1890 line[linelen - 1] = 0;
1891
1892 if (opt_iconv != ICONV_NONE) {
1893 char *inbuf = line;
1894 size_t inlen = linelen;
1895
1896 char *outbuf = out_buffer;
1897 size_t outlen = sizeof(out_buffer);
1898
1899 size_t ret;
1900
1901 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1902 if (ret != (size_t) -1) {
1903 line = out_buffer;
1904 linelen = strlen(out_buffer);
1905 }
1906 }
1907
1908 if (!view->ops->read(view, line))
1909 goto alloc_error;
1910
1911 if (lines-- == 1)
1912 break;
1913 }
1914
1915 {
1916 int digits;
1917
1918 lines = view->lines;
1919 for (digits = 0; lines; digits++)
1920 lines /= 10;
1921
1922 /* Keep the displayed view in sync with line number scaling. */
1923 if (digits != view->digits) {
1924 view->digits = digits;
1925 redraw_from = 0;
1926 }
1927 }
1928
1929 if (!view_is_displayed(view))
1930 goto check_pipe;
1931
1932 if (view == VIEW(REQ_VIEW_TREE)) {
1933 /* Clear the view and redraw everything since the tree sorting
1934 * might have rearranged things. */
1935 redraw_view(view);
1936
1937 } else if (redraw_from >= 0) {
1938 /* If this is an incremental update, redraw the previous line
1939 * since for commits some members could have changed when
1940 * loading the main view. */
1941 if (redraw_from > 0)
1942 redraw_from--;
1943
1944 /* Since revision graph visualization requires knowledge
1945 * about the parent commit, it causes a further one-off
1946 * needed to be redrawn for incremental updates. */
1947 if (redraw_from > 0 && opt_rev_graph)
1948 redraw_from--;
1949
1950 /* Incrementally draw avoids flickering. */
1951 redraw_view_from(view, redraw_from);
1952 }
1953
1954 /* Update the title _after_ the redraw so that if the redraw picks up a
1955 * commit reference in view->ref it'll be available here. */
1956 update_view_title(view);
1957
1958 check_pipe:
1959 if (ferror(view->pipe)) {
1960 report("Failed to read: %s", strerror(errno));
1961 goto end;
1962
1963 } else if (feof(view->pipe)) {
1964 report("");
1965 goto end;
1966 }
1967
1968 return TRUE;
1969
1970 alloc_error:
1971 report("Allocation failure");
1972
1973 end:
1974 view->ops->read(view, NULL);
1975 end_update(view);
1976 return FALSE;
1977 }
1978
1979 static struct line *
1980 add_line_text(struct view *view, char *data, enum line_type type)
1981 {
1982 struct line *line = &view->line[view->lines];
1983
1984 if (!data)
1985 return NULL;
1986
1987 line->data = strdup(data);
1988 if (!line->data)
1989 return NULL;
1990
1991 line->type = type;
1992 view->lines++;
1993
1994 return line;
1995 }
1996
1997
1998 /*
1999 * View opening
2000 */
2001
2002 static void open_help_view(struct view *view)
2003 {
2004 char buf[BUFSIZ];
2005 int lines = ARRAY_SIZE(req_info) + 2;
2006 int i;
2007
2008 if (view->lines > 0)
2009 return;
2010
2011 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2012 if (!req_info[i].request)
2013 lines++;
2014
2015 view->line = calloc(lines, sizeof(*view->line));
2016 if (!view->line) {
2017 report("Allocation failure");
2018 return;
2019 }
2020
2021 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2022
2023 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2024 char *key;
2025
2026 if (!req_info[i].request) {
2027 add_line_text(view, "", LINE_DEFAULT);
2028 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2029 continue;
2030 }
2031
2032 key = get_key(req_info[i].request);
2033 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2034 continue;
2035
2036 add_line_text(view, buf, LINE_DEFAULT);
2037 }
2038 }
2039
2040 enum open_flags {
2041 OPEN_DEFAULT = 0, /* Use default view switching. */
2042 OPEN_SPLIT = 1, /* Split current view. */
2043 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2044 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2045 };
2046
2047 static void
2048 open_view(struct view *prev, enum request request, enum open_flags flags)
2049 {
2050 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2051 bool split = !!(flags & OPEN_SPLIT);
2052 bool reload = !!(flags & OPEN_RELOAD);
2053 struct view *view = VIEW(request);
2054 int nviews = displayed_views();
2055 struct view *base_view = display[0];
2056
2057 if (view == prev && nviews == 1 && !reload) {
2058 report("Already in %s view", view->name);
2059 return;
2060 }
2061
2062 if (view == VIEW(REQ_VIEW_HELP)) {
2063 open_help_view(view);
2064
2065 } else if ((reload || strcmp(view->vid, view->id)) &&
2066 !begin_update(view)) {
2067 report("Failed to load %s view", view->name);
2068 return;
2069 }
2070
2071 if (split) {
2072 display[1] = view;
2073 if (!backgrounded)
2074 current_view = 1;
2075 } else {
2076 /* Maximize the current view. */
2077 memset(display, 0, sizeof(display));
2078 current_view = 0;
2079 display[current_view] = view;
2080 }
2081
2082 /* Resize the view when switching between split- and full-screen,
2083 * or when switching between two different full-screen views. */
2084 if (nviews != displayed_views() ||
2085 (nviews == 1 && base_view != display[0]))
2086 resize_display();
2087
2088 if (split && prev->lineno - prev->offset >= prev->height) {
2089 /* Take the title line into account. */
2090 int lines = prev->lineno - prev->offset - prev->height + 1;
2091
2092 /* Scroll the view that was split if the current line is
2093 * outside the new limited view. */
2094 do_scroll_view(prev, lines);
2095 }
2096
2097 if (prev && view != prev) {
2098 if (split && !backgrounded) {
2099 /* "Blur" the previous view. */
2100 update_view_title(prev);
2101 }
2102
2103 view->parent = prev;
2104 }
2105
2106 if (view->pipe && view->lines == 0) {
2107 /* Clear the old view and let the incremental updating refill
2108 * the screen. */
2109 wclear(view->win);
2110 report("");
2111 } else {
2112 redraw_view(view);
2113 report("");
2114 }
2115
2116 /* If the view is backgrounded the above calls to report()
2117 * won't redraw the view title. */
2118 if (backgrounded)
2119 update_view_title(view);
2120 }
2121
2122
2123 /*
2124 * User request switch noodle
2125 */
2126
2127 static int
2128 view_driver(struct view *view, enum request request)
2129 {
2130 int i;
2131
2132 switch (request) {
2133 case REQ_MOVE_UP:
2134 case REQ_MOVE_DOWN:
2135 case REQ_MOVE_PAGE_UP:
2136 case REQ_MOVE_PAGE_DOWN:
2137 case REQ_MOVE_FIRST_LINE:
2138 case REQ_MOVE_LAST_LINE:
2139 move_view(view, request);
2140 break;
2141
2142 case REQ_SCROLL_LINE_DOWN:
2143 case REQ_SCROLL_LINE_UP:
2144 case REQ_SCROLL_PAGE_DOWN:
2145 case REQ_SCROLL_PAGE_UP:
2146 scroll_view(view, request);
2147 break;
2148
2149 case REQ_VIEW_BLOB:
2150 if (!ref_blob[0]) {
2151 report("No file chosen, press %s to open tree view",
2152 get_key(REQ_VIEW_TREE));
2153 break;
2154 }
2155 /* Fall-through */
2156 case REQ_VIEW_MAIN:
2157 case REQ_VIEW_DIFF:
2158 case REQ_VIEW_LOG:
2159 case REQ_VIEW_TREE:
2160 case REQ_VIEW_HELP:
2161 case REQ_VIEW_PAGER:
2162 open_view(view, request, OPEN_DEFAULT);
2163 break;
2164
2165 case REQ_NEXT:
2166 case REQ_PREVIOUS:
2167 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2168
2169 if ((view == VIEW(REQ_VIEW_DIFF) &&
2170 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2171 (view == VIEW(REQ_VIEW_BLOB) &&
2172 view->parent == VIEW(REQ_VIEW_TREE))) {
2173 view = view->parent;
2174 move_view(view, request);
2175 if (view_is_displayed(view))
2176 update_view_title(view);
2177 } else {
2178 move_view(view, request);
2179 break;
2180 }
2181 /* Fall-through */
2182
2183 case REQ_ENTER:
2184 if (!view->lines) {
2185 report("Nothing to enter");
2186 break;
2187 }
2188 return view->ops->enter(view, &view->line[view->lineno]);
2189
2190 case REQ_VIEW_NEXT:
2191 {
2192 int nviews = displayed_views();
2193 int next_view = (current_view + 1) % nviews;
2194
2195 if (next_view == current_view) {
2196 report("Only one view is displayed");
2197 break;
2198 }
2199
2200 current_view = next_view;
2201 /* Blur out the title of the previous view. */
2202 update_view_title(view);
2203 report("");
2204 break;
2205 }
2206 case REQ_TOGGLE_LINENO:
2207 opt_line_number = !opt_line_number;
2208 redraw_display();
2209 break;
2210
2211 case REQ_TOGGLE_REV_GRAPH:
2212 opt_rev_graph = !opt_rev_graph;
2213 redraw_display();
2214 break;
2215
2216 case REQ_PROMPT:
2217 /* Always reload^Wrerun commands from the prompt. */
2218 open_view(view, opt_request, OPEN_RELOAD);
2219 break;
2220
2221 case REQ_SEARCH:
2222 case REQ_SEARCH_BACK:
2223 search_view(view, request);
2224 break;
2225
2226 case REQ_FIND_NEXT:
2227 case REQ_FIND_PREV:
2228 find_next(view, request);
2229 break;
2230
2231 case REQ_STOP_LOADING:
2232 for (i = 0; i < ARRAY_SIZE(views); i++) {
2233 view = &views[i];
2234 if (view->pipe)
2235 report("Stopped loading the %s view", view->name),
2236 end_update(view);
2237 }
2238 break;
2239
2240 case REQ_SHOW_VERSION:
2241 report("%s (built %s)", VERSION, __DATE__);
2242 return TRUE;
2243
2244 case REQ_SCREEN_RESIZE:
2245 resize_display();
2246 /* Fall-through */
2247 case REQ_SCREEN_REDRAW:
2248 redraw_display();
2249 break;
2250
2251 case REQ_NONE:
2252 doupdate();
2253 return TRUE;
2254
2255 case REQ_VIEW_CLOSE:
2256 /* XXX: Mark closed views by letting view->parent point to the
2257 * view itself. Parents to closed view should never be
2258 * followed. */
2259 if (view->parent &&
2260 view->parent->parent != view->parent) {
2261 memset(display, 0, sizeof(display));
2262 current_view = 0;
2263 display[current_view] = view->parent;
2264 view->parent = view;
2265 resize_display();
2266 redraw_display();
2267 break;
2268 }
2269 /* Fall-through */
2270 case REQ_QUIT:
2271 return FALSE;
2272
2273 default:
2274 /* An unknown key will show most commonly used commands. */
2275 report("Unknown key, press 'h' for help");
2276 return TRUE;
2277 }
2278
2279 return TRUE;
2280 }
2281
2282
2283 /*
2284 * Pager backend
2285 */
2286
2287 static bool
2288 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2289 {
2290 char *text = line->data;
2291 enum line_type type = line->type;
2292 int textlen = strlen(text);
2293 int attr;
2294
2295 wmove(view->win, lineno, 0);
2296
2297 if (selected) {
2298 type = LINE_CURSOR;
2299 wchgat(view->win, -1, 0, type, NULL);
2300 }
2301
2302 attr = get_line_attr(type);
2303 wattrset(view->win, attr);
2304
2305 if (opt_line_number || opt_tab_size < TABSIZE) {
2306 static char spaces[] = " ";
2307 int col_offset = 0, col = 0;
2308
2309 if (opt_line_number) {
2310 unsigned long real_lineno = view->offset + lineno + 1;
2311
2312 if (real_lineno == 1 ||
2313 (real_lineno % opt_num_interval) == 0) {
2314 wprintw(view->win, "%.*d", view->digits, real_lineno);
2315
2316 } else {
2317 waddnstr(view->win, spaces,
2318 MIN(view->digits, STRING_SIZE(spaces)));
2319 }
2320 waddstr(view->win, ": ");
2321 col_offset = view->digits + 2;
2322 }
2323
2324 while (text && col_offset + col < view->width) {
2325 int cols_max = view->width - col_offset - col;
2326 char *pos = text;
2327 int cols;
2328
2329 if (*text == '\t') {
2330 text++;
2331 assert(sizeof(spaces) > TABSIZE);
2332 pos = spaces;
2333 cols = opt_tab_size - (col % opt_tab_size);
2334
2335 } else {
2336 text = strchr(text, '\t');
2337 cols = line ? text - pos : strlen(pos);
2338 }
2339
2340 waddnstr(view->win, pos, MIN(cols, cols_max));
2341 col += cols;
2342 }
2343
2344 } else {
2345 int col = 0, pos = 0;
2346
2347 for (; pos < textlen && col < view->width; pos++, col++)
2348 if (text[pos] == '\t')
2349 col += TABSIZE - (col % TABSIZE) - 1;
2350
2351 waddnstr(view->win, text, pos);
2352 }
2353
2354 return TRUE;
2355 }
2356
2357 static bool
2358 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2359 {
2360 char refbuf[SIZEOF_STR];
2361 char *ref = NULL;
2362 FILE *pipe;
2363
2364 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2365 return TRUE;
2366
2367 pipe = popen(refbuf, "r");
2368 if (!pipe)
2369 return TRUE;
2370
2371 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2372 ref = chomp_string(ref);
2373 pclose(pipe);
2374
2375 if (!ref || !*ref)
2376 return TRUE;
2377
2378 /* This is the only fatal call, since it can "corrupt" the buffer. */
2379 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2380 return FALSE;
2381
2382 return TRUE;
2383 }
2384
2385 static void
2386 add_pager_refs(struct view *view, struct line *line)
2387 {
2388 char buf[SIZEOF_STR];
2389 char *commit_id = line->data + STRING_SIZE("commit ");
2390 struct ref **refs;
2391 size_t bufpos = 0, refpos = 0;
2392 const char *sep = "Refs: ";
2393 bool is_tag = FALSE;
2394
2395 assert(line->type == LINE_COMMIT);
2396
2397 refs = get_refs(commit_id);
2398 if (!refs) {
2399 if (view == VIEW(REQ_VIEW_DIFF))
2400 goto try_add_describe_ref;
2401 return;
2402 }
2403
2404 do {
2405 struct ref *ref = refs[refpos];
2406 char *fmt = ref->tag ? "%s[%s]" :
2407 ref->remote ? "%s<%s>" : "%s%s";
2408
2409 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2410 return;
2411 sep = ", ";
2412 if (ref->tag)
2413 is_tag = TRUE;
2414 } while (refs[refpos++]->next);
2415
2416 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2417 try_add_describe_ref:
2418 /* Add <tag>-g<commit_id> "fake" reference. */
2419 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2420 return;
2421 }
2422
2423 if (bufpos == 0)
2424 return;
2425
2426 if (!realloc_lines(view, view->line_size + 1))
2427 return;
2428
2429 add_line_text(view, buf, LINE_PP_REFS);
2430 }
2431
2432 static bool
2433 pager_read(struct view *view, char *data)
2434 {
2435 struct line *line;
2436
2437 if (!data)
2438 return TRUE;
2439
2440 line = add_line_text(view, data, get_line_type(data));
2441 if (!line)
2442 return FALSE;
2443
2444 if (line->type == LINE_COMMIT &&
2445 (view == VIEW(REQ_VIEW_DIFF) ||
2446 view == VIEW(REQ_VIEW_LOG)))
2447 add_pager_refs(view, line);
2448
2449 return TRUE;
2450 }
2451
2452 static bool
2453 pager_enter(struct view *view, struct line *line)
2454 {
2455 int split = 0;
2456
2457 if (line->type == LINE_COMMIT &&
2458 (view == VIEW(REQ_VIEW_LOG) ||
2459 view == VIEW(REQ_VIEW_PAGER))) {
2460 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2461 split = 1;
2462 }
2463
2464 /* Always scroll the view even if it was split. That way
2465 * you can use Enter to scroll through the log view and
2466 * split open each commit diff. */
2467 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2468
2469 /* FIXME: A minor workaround. Scrolling the view will call report("")
2470 * but if we are scrolling a non-current view this won't properly
2471 * update the view title. */
2472 if (split)
2473 update_view_title(view);
2474
2475 return TRUE;
2476 }
2477
2478 static bool
2479 pager_grep(struct view *view, struct line *line)
2480 {
2481 regmatch_t pmatch;
2482 char *text = line->data;
2483
2484 if (!*text)
2485 return FALSE;
2486
2487 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2488 return FALSE;
2489
2490 return TRUE;
2491 }
2492
2493 static void
2494 pager_select(struct view *view, struct line *line)
2495 {
2496 if (line->type == LINE_COMMIT) {
2497 char *text = line->data + STRING_SIZE("commit ");
2498
2499 if (view != VIEW(REQ_VIEW_PAGER))
2500 string_copy(view->ref, text);
2501 string_copy(ref_commit, text);
2502 }
2503 }
2504
2505 static struct view_ops pager_ops = {
2506 "line",
2507 pager_draw,
2508 pager_read,
2509 pager_enter,
2510 pager_grep,
2511 pager_select,
2512 };
2513
2514
2515 /*
2516 * Tree backend
2517 */
2518
2519 /* Parse output from git-ls-tree(1):
2520 *
2521 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2522 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2523 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2524 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2525 */
2526
2527 #define SIZEOF_TREE_ATTR \
2528 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2529
2530 #define TREE_UP_FORMAT "040000 tree %s\t.."
2531
2532 static int
2533 tree_compare_entry(enum line_type type1, char *name1,
2534 enum line_type type2, char *name2)
2535 {
2536 if (type1 != type2) {
2537 if (type1 == LINE_TREE_DIR)
2538 return -1;
2539 return 1;
2540 }
2541
2542 return strcmp(name1, name2);
2543 }
2544
2545 static bool
2546 tree_read(struct view *view, char *text)
2547 {
2548 size_t textlen = text ? strlen(text) : 0;
2549 char buf[SIZEOF_STR];
2550 unsigned long pos;
2551 enum line_type type;
2552 bool first_read = view->lines == 0;
2553
2554 if (textlen <= SIZEOF_TREE_ATTR)
2555 return FALSE;
2556
2557 type = text[STRING_SIZE("100644 ")] == 't'
2558 ? LINE_TREE_DIR : LINE_TREE_FILE;
2559
2560 if (first_read) {
2561 /* Add path info line */
2562 if (!string_format(buf, "Directory path /%s", opt_path) ||
2563 !realloc_lines(view, view->line_size + 1) ||
2564 !add_line_text(view, buf, LINE_DEFAULT))
2565 return FALSE;
2566
2567 /* Insert "link" to parent directory. */
2568 if (*opt_path) {
2569 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
2570 !realloc_lines(view, view->line_size + 1) ||
2571 !add_line_text(view, buf, LINE_TREE_DIR))
2572 return FALSE;
2573 }
2574 }
2575
2576 /* Strip the path part ... */
2577 if (*opt_path) {
2578 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2579 size_t striplen = strlen(opt_path);
2580 char *path = text + SIZEOF_TREE_ATTR;
2581
2582 if (pathlen > striplen)
2583 memmove(path, path + striplen,
2584 pathlen - striplen + 1);
2585 }
2586
2587 /* Skip "Directory ..." and ".." line. */
2588 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2589 struct line *line = &view->line[pos];
2590 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2591 char *path2 = text + SIZEOF_TREE_ATTR;
2592 int cmp = tree_compare_entry(line->type, path1, type, path2);
2593
2594 if (cmp <= 0)
2595 continue;
2596
2597 text = strdup(text);
2598 if (!text)
2599 return FALSE;
2600
2601 if (view->lines > pos)
2602 memmove(&view->line[pos + 1], &view->line[pos],
2603 (view->lines - pos) * sizeof(*line));
2604
2605 line = &view->line[pos];
2606 line->data = text;
2607 line->type = type;
2608 view->lines++;
2609 return TRUE;
2610 }
2611
2612 if (!add_line_text(view, text, type))
2613 return FALSE;
2614
2615 /* Move the current line to the first tree entry. */
2616 if (first_read)
2617 view->lineno++;
2618
2619 return TRUE;
2620 }
2621
2622 static bool
2623 tree_enter(struct view *view, struct line *line)
2624 {
2625 enum open_flags flags;
2626 enum request request;
2627
2628 switch (line->type) {
2629 case LINE_TREE_DIR:
2630 /* Depending on whether it is a subdir or parent (updir?) link
2631 * mangle the path buffer. */
2632 if (line == &view->line[1] && *opt_path) {
2633 size_t path_len = strlen(opt_path);
2634 char *dirsep = opt_path + path_len - 1;
2635
2636 while (dirsep > opt_path && dirsep[-1] != '/')
2637 dirsep--;
2638
2639 dirsep[0] = 0;
2640
2641 } else {
2642 size_t pathlen = strlen(opt_path);
2643 size_t origlen = pathlen;
2644 char *data = line->data;
2645 char *basename = data + SIZEOF_TREE_ATTR;
2646
2647 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2648 opt_path[origlen] = 0;
2649 return TRUE;
2650 }
2651 }
2652
2653 /* Trees and subtrees share the same ID, so they are not not
2654 * unique like blobs. */
2655 flags = OPEN_RELOAD;
2656 request = REQ_VIEW_TREE;
2657 break;
2658
2659 case LINE_TREE_FILE:
2660 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2661 request = REQ_VIEW_BLOB;
2662 break;
2663
2664 default:
2665 return TRUE;
2666 }
2667
2668 open_view(view, request, flags);
2669
2670 return TRUE;
2671 }
2672
2673 static void
2674 tree_select(struct view *view, struct line *line)
2675 {
2676 char *text = line->data + STRING_SIZE("100644 blob ");
2677
2678 if (line->type == LINE_TREE_FILE) {
2679 string_ncopy(ref_blob, text, 40);
2680
2681 } else if (line->type != LINE_TREE_DIR) {
2682 return;
2683 }
2684
2685 string_ncopy(view->ref, text, 40);
2686 }
2687
2688 static struct view_ops tree_ops = {
2689 "file",
2690 pager_draw,
2691 tree_read,
2692 tree_enter,
2693 pager_grep,
2694 tree_select,
2695 };
2696
2697 static bool
2698 blob_read(struct view *view, char *line)
2699 {
2700 return add_line_text(view, line, LINE_DEFAULT);
2701 }
2702
2703 static struct view_ops blob_ops = {
2704 "line",
2705 pager_draw,
2706 blob_read,
2707 pager_enter,
2708 pager_grep,
2709 pager_select,
2710 };
2711
2712
2713 /*
2714 * Revision graph
2715 */
2716
2717 struct commit {
2718 char id[SIZEOF_REV]; /* SHA1 ID. */
2719 char title[128]; /* First line of the commit message. */
2720 char author[75]; /* Author of the commit. */
2721 struct tm time; /* Date from the author ident. */
2722 struct ref **refs; /* Repository references. */
2723 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2724 size_t graph_size; /* The width of the graph array. */
2725 };
2726
2727 /* Size of rev graph with no "padding" columns */
2728 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
2729
2730 struct rev_graph {
2731 struct rev_graph *prev, *next, *parents;
2732 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
2733 size_t size;
2734 struct commit *commit;
2735 size_t pos;
2736 };
2737
2738 /* Parents of the commit being visualized. */
2739 static struct rev_graph graph_parents[4];
2740
2741 /* The current stack of revisions on the graph. */
2742 static struct rev_graph graph_stacks[4] = {
2743 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
2744 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
2745 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
2746 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
2747 };
2748
2749 static inline bool
2750 graph_parent_is_merge(struct rev_graph *graph)
2751 {
2752 return graph->parents->size > 1;
2753 }
2754
2755 static inline void
2756 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
2757 {
2758 struct commit *commit = graph->commit;
2759
2760 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
2761 commit->graph[commit->graph_size++] = symbol;
2762 }
2763
2764 static void
2765 done_rev_graph(struct rev_graph *graph)
2766 {
2767 if (graph_parent_is_merge(graph) &&
2768 graph->pos < graph->size - 1 &&
2769 graph->next->size == graph->size + graph->parents->size - 1) {
2770 size_t i = graph->pos + graph->parents->size - 1;
2771
2772 graph->commit->graph_size = i * 2;
2773 while (i < graph->next->size - 1) {
2774 append_to_rev_graph(graph, ' ');
2775 append_to_rev_graph(graph, '\\');
2776 i++;
2777 }
2778 }
2779
2780 graph->size = graph->pos = 0;
2781 graph->commit = NULL;
2782 memset(graph->parents, 0, sizeof(*graph->parents));
2783 }
2784
2785 static void
2786 push_rev_graph(struct rev_graph *graph, char *parent)
2787 {
2788 int i;
2789
2790 /* "Collapse" duplicate parents lines.
2791 *
2792 * FIXME: This needs to also update update the drawn graph but
2793 * for now it just serves as a method for pruning graph lines. */
2794 for (i = 0; i < graph->size; i++)
2795 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
2796 return;
2797
2798 if (graph->size < SIZEOF_REVITEMS) {
2799 string_ncopy(graph->rev[graph->size++], parent, SIZEOF_REV);
2800 }
2801 }
2802
2803 static chtype
2804 get_rev_graph_symbol(struct rev_graph *graph)
2805 {
2806 chtype symbol;
2807
2808 if (graph->parents->size == 0)
2809 symbol = REVGRAPH_INIT;
2810 else if (graph_parent_is_merge(graph))
2811 symbol = REVGRAPH_MERGE;
2812 else if (graph->pos >= graph->size)
2813 symbol = REVGRAPH_BRANCH;
2814 else
2815 symbol = REVGRAPH_COMMIT;
2816
2817 return symbol;
2818 }
2819
2820 static void
2821 draw_rev_graph(struct rev_graph *graph)
2822 {
2823 struct rev_filler {
2824 chtype separator, line;
2825 };
2826 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
2827 static struct rev_filler fillers[] = {
2828 { ' ', REVGRAPH_LINE },
2829 { '`', '.' },
2830 { '\'', ' ' },
2831 { '/', ' ' },
2832 };
2833 chtype symbol = get_rev_graph_symbol(graph);
2834 struct rev_filler *filler;
2835 size_t i;
2836
2837 filler = &fillers[DEFAULT];
2838
2839 for (i = 0; i < graph->pos; i++) {
2840 append_to_rev_graph(graph, filler->line);
2841 if (graph_parent_is_merge(graph->prev) &&
2842 graph->prev->pos == i)
2843 filler = &fillers[RSHARP];
2844
2845 append_to_rev_graph(graph, filler->separator);
2846 }
2847
2848 /* Place the symbol for this revision. */
2849 append_to_rev_graph(graph, symbol);
2850
2851 if (graph->prev->size > graph->size)
2852 filler = &fillers[RDIAG];
2853 else
2854 filler = &fillers[DEFAULT];
2855
2856 i++;
2857
2858 for (; i < graph->size; i++) {
2859 append_to_rev_graph(graph, filler->separator);
2860 append_to_rev_graph(graph, filler->line);
2861 if (graph_parent_is_merge(graph->prev) &&
2862 i < graph->prev->pos + graph->parents->size)
2863 filler = &fillers[RSHARP];
2864 if (graph->prev->size > graph->size)
2865 filler = &fillers[LDIAG];
2866 }
2867
2868 if (graph->prev->size > graph->size) {
2869 append_to_rev_graph(graph, filler->separator);
2870 if (filler->line != ' ')
2871 append_to_rev_graph(graph, filler->line);
2872 }
2873 }
2874
2875 /* Prepare the next rev graph */
2876 static void
2877 prepare_rev_graph(struct rev_graph *graph)
2878 {
2879 size_t i;
2880
2881 /* First, traverse all lines of revisions up to the active one. */
2882 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
2883 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
2884 break;
2885
2886 push_rev_graph(graph->next, graph->rev[graph->pos]);
2887 }
2888
2889 /* Interleave the new revision parent(s). */
2890 for (i = 0; i < graph->parents->size; i++)
2891 push_rev_graph(graph->next, graph->parents->rev[i]);
2892
2893 /* Lastly, put any remaining revisions. */
2894 for (i = graph->pos + 1; i < graph->size; i++)
2895 push_rev_graph(graph->next, graph->rev[i]);
2896 }
2897
2898 static void
2899 update_rev_graph(struct rev_graph *graph)
2900 {
2901 /* If this is the finalizing update ... */
2902 if (graph->commit)
2903 prepare_rev_graph(graph);
2904
2905 /* Graph visualization needs a one rev look-ahead,
2906 * so the first update doesn't visualize anything. */
2907 if (!graph->prev->commit)
2908 return;
2909
2910 draw_rev_graph(graph->prev);
2911 done_rev_graph(graph->prev->prev);
2912 }
2913
2914
2915 /*
2916 * Main view backend
2917 */
2918
2919 static bool
2920 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2921 {
2922 char buf[DATE_COLS + 1];
2923 struct commit *commit = line->data;
2924 enum line_type type;
2925 int col = 0;
2926 size_t timelen;
2927 size_t authorlen;
2928 int trimmed = 1;
2929
2930 if (!*commit->author)
2931 return FALSE;
2932
2933 wmove(view->win, lineno, col);
2934
2935 if (selected) {
2936 type = LINE_CURSOR;
2937 wattrset(view->win, get_line_attr(type));
2938 wchgat(view->win, -1, 0, type, NULL);
2939
2940 } else {
2941 type = LINE_MAIN_COMMIT;
2942 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2943 }
2944
2945 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2946 waddnstr(view->win, buf, timelen);
2947 waddstr(view->win, " ");
2948
2949 col += DATE_COLS;
2950 wmove(view->win, lineno, col);
2951 if (type != LINE_CURSOR)
2952 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2953
2954 if (opt_utf8) {
2955 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2956 } else {
2957 authorlen = strlen(commit->author);
2958 if (authorlen > AUTHOR_COLS - 2) {
2959 authorlen = AUTHOR_COLS - 2;
2960 trimmed = 1;
2961 }
2962 }
2963
2964 if (trimmed) {
2965 waddnstr(view->win, commit->author, authorlen);
2966 if (type != LINE_CURSOR)
2967 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2968 waddch(view->win, '~');
2969 } else {
2970 waddstr(view->win, commit->author);
2971 }
2972
2973 col += AUTHOR_COLS;
2974 if (type != LINE_CURSOR)
2975 wattrset(view->win, A_NORMAL);
2976
2977 if (opt_rev_graph && commit->graph_size) {
2978 size_t i;
2979
2980 wmove(view->win, lineno, col);
2981 /* Using waddch() instead of waddnstr() ensures that
2982 * they'll be rendered correctly for the cursor line. */
2983 for (i = 0; i < commit->graph_size; i++)
2984 waddch(view->win, commit->graph[i]);
2985
2986 waddch(view->win, ' ');
2987 col += commit->graph_size + 1;
2988 }
2989
2990 wmove(view->win, lineno, col);
2991
2992 if (commit->refs) {
2993 size_t i = 0;
2994
2995 do {
2996 if (type == LINE_CURSOR)
2997 ;
2998 else if (commit->refs[i]->tag)
2999 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
3000 else if (commit->refs[i]->remote)
3001 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
3002 else
3003 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
3004 waddstr(view->win, "[");
3005 waddstr(view->win, commit->refs[i]->name);
3006 waddstr(view->win, "]");
3007 if (type != LINE_CURSOR)
3008 wattrset(view->win, A_NORMAL);
3009 waddstr(view->win, " ");
3010 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
3011 } while (commit->refs[i++]->next);
3012 }
3013
3014 if (type != LINE_CURSOR)
3015 wattrset(view->win, get_line_attr(type));
3016
3017 {
3018 int titlelen = strlen(commit->title);
3019
3020 if (col + titlelen > view->width)
3021 titlelen = view->width - col;
3022
3023 waddnstr(view->win, commit->title, titlelen);
3024 }
3025
3026 return TRUE;
3027 }
3028
3029 /* Reads git log --pretty=raw output and parses it into the commit struct. */
3030 static bool
3031 main_read(struct view *view, char *line)
3032 {
3033 static struct rev_graph *graph = graph_stacks;
3034 enum line_type type;
3035 struct commit *commit = view->lines
3036 ? view->line[view->lines - 1].data : NULL;
3037
3038 if (!line) {
3039 update_rev_graph(graph);
3040 return TRUE;
3041 }
3042
3043 type = get_line_type(line);
3044
3045 switch (type) {
3046 case LINE_COMMIT:
3047 commit = calloc(1, sizeof(struct commit));
3048 if (!commit)
3049 return FALSE;
3050
3051 line += STRING_SIZE("commit ");
3052
3053 view->line[view->lines++].data = commit;
3054 string_copy(commit->id, line);
3055 commit->refs = get_refs(commit->id);
3056 graph->commit = commit;
3057 break;
3058
3059 case LINE_PARENT:
3060 if (commit) {
3061 line += STRING_SIZE("parent ");
3062 push_rev_graph(graph->parents, line);
3063 }
3064 break;
3065
3066 case LINE_AUTHOR:
3067 {
3068 /* Parse author lines where the name may be empty:
3069 * author <email@address.tld> 1138474660 +0100
3070 */
3071 char *ident = line + STRING_SIZE("author ");
3072 char *nameend = strchr(ident, '<');
3073 char *emailend = strchr(ident, '>');
3074
3075 if (!commit || !nameend || !emailend)
3076 break;
3077
3078 update_rev_graph(graph);
3079 graph = graph->next;
3080
3081 *nameend = *emailend = 0;
3082 ident = chomp_string(ident);
3083 if (!*ident) {
3084 ident = chomp_string(nameend + 1);
3085 if (!*ident)
3086 ident = "Unknown";
3087 }
3088
3089 string_copy(commit->author, ident);
3090
3091 /* Parse epoch and timezone */
3092 if (emailend[1] == ' ') {
3093 char *secs = emailend + 2;
3094 char *zone = strchr(secs, ' ');
3095 time_t time = (time_t) atol(secs);
3096
3097 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3098 long tz;
3099
3100 zone++;
3101 tz = ('0' - zone[1]) * 60 * 60 * 10;
3102 tz += ('0' - zone[2]) * 60 * 60;
3103 tz += ('0' - zone[3]) * 60;
3104 tz += ('0' - zone[4]) * 60;
3105
3106 if (zone[0] == '-')
3107 tz = -tz;
3108
3109 time -= tz;
3110 }
3111
3112 gmtime_r(&time, &commit->time);
3113 }
3114 break;
3115 }
3116 default:
3117 if (!commit)
3118 break;
3119
3120 /* Fill in the commit title if it has not already been set. */
3121 if (commit->title[0])
3122 break;
3123
3124 /* Require titles to start with a non-space character at the
3125 * offset used by git log. */
3126 if (strncmp(line, " ", 4))
3127 break;
3128 line += 4;
3129 /* Well, if the title starts with a whitespace character,
3130 * try to be forgiving. Otherwise we end up with no title. */
3131 while (isspace(*line))
3132 line++;
3133 if (*line == '\0')
3134 break;
3135 /* FIXME: More graceful handling of titles; append "..." to
3136 * shortened titles, etc. */
3137
3138 string_copy(commit->title, line);
3139 }
3140
3141 return TRUE;
3142 }
3143
3144 static bool
3145 main_enter(struct view *view, struct line *line)
3146 {
3147 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3148
3149 open_view(view, REQ_VIEW_DIFF, flags);
3150 return TRUE;
3151 }
3152
3153 static bool
3154 main_grep(struct view *view, struct line *line)
3155 {
3156 struct commit *commit = line->data;
3157 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
3158 char buf[DATE_COLS + 1];
3159 regmatch_t pmatch;
3160
3161 for (state = S_TITLE; state < S_END; state++) {
3162 char *text;
3163
3164 switch (state) {
3165 case S_TITLE: text = commit->title; break;
3166 case S_AUTHOR: text = commit->author; break;
3167 case S_DATE:
3168 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
3169 continue;
3170 text = buf;
3171 break;
3172
3173 default:
3174 return FALSE;
3175 }
3176
3177 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3178 return TRUE;
3179 }
3180
3181 return FALSE;
3182 }
3183
3184 static void
3185 main_select(struct view *view, struct line *line)
3186 {
3187 struct commit *commit = line->data;
3188
3189 string_copy(view->ref, commit->id);
3190 string_copy(ref_commit, view->ref);
3191 }
3192
3193 static struct view_ops main_ops = {
3194 "commit",
3195 main_draw,
3196 main_read,
3197 main_enter,
3198 main_grep,
3199 main_select,
3200 };
3201
3202
3203 /*
3204 * Unicode / UTF-8 handling
3205 *
3206 * NOTE: Much of the following code for dealing with unicode is derived from
3207 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
3208 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
3209 */
3210
3211 /* I've (over)annotated a lot of code snippets because I am not entirely
3212 * confident that the approach taken by this small UTF-8 interface is correct.
3213 * --jonas */
3214
3215 static inline int
3216 unicode_width(unsigned long c)
3217 {
3218 if (c >= 0x1100 &&
3219 (c <= 0x115f /* Hangul Jamo */
3220 || c == 0x2329
3221 || c == 0x232a
3222 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
3223 /* CJK ... Yi */
3224 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
3225 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
3226 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
3227 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
3228 || (c >= 0xffe0 && c <= 0xffe6)
3229 || (c >= 0x20000 && c <= 0x2fffd)
3230 || (c >= 0x30000 && c <= 0x3fffd)))
3231 return 2;
3232
3233 return 1;
3234 }
3235
3236 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3237 * Illegal bytes are set one. */
3238 static const unsigned char utf8_bytes[256] = {
3239 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,
3240 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,
3241 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,
3242 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,
3243 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,
3244 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,
3245 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,
3246 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,
3247 };
3248
3249 /* Decode UTF-8 multi-byte representation into a unicode character. */
3250 static inline unsigned long
3251 utf8_to_unicode(const char *string, size_t length)
3252 {
3253 unsigned long unicode;
3254
3255 switch (length) {
3256 case 1:
3257 unicode = string[0];
3258 break;
3259 case 2:
3260 unicode = (string[0] & 0x1f) << 6;
3261 unicode += (string[1] & 0x3f);
3262 break;
3263 case 3:
3264 unicode = (string[0] & 0x0f) << 12;
3265 unicode += ((string[1] & 0x3f) << 6);
3266 unicode += (string[2] & 0x3f);
3267 break;
3268 case 4:
3269 unicode = (string[0] & 0x0f) << 18;
3270 unicode += ((string[1] & 0x3f) << 12);
3271 unicode += ((string[2] & 0x3f) << 6);
3272 unicode += (string[3] & 0x3f);
3273 break;
3274 case 5:
3275 unicode = (string[0] & 0x0f) << 24;
3276 unicode += ((string[1] & 0x3f) << 18);
3277 unicode += ((string[2] & 0x3f) << 12);
3278 unicode += ((string[3] & 0x3f) << 6);
3279 unicode += (string[4] & 0x3f);
3280 break;
3281 case 6:
3282 unicode = (string[0] & 0x01) << 30;
3283 unicode += ((string[1] & 0x3f) << 24);
3284 unicode += ((string[2] & 0x3f) << 18);
3285 unicode += ((string[3] & 0x3f) << 12);
3286 unicode += ((string[4] & 0x3f) << 6);
3287 unicode += (string[5] & 0x3f);
3288 break;
3289 default:
3290 die("Invalid unicode length");
3291 }
3292
3293 /* Invalid characters could return the special 0xfffd value but NUL
3294 * should be just as good. */
3295 return unicode > 0xffff ? 0 : unicode;
3296 }
3297
3298 /* Calculates how much of string can be shown within the given maximum width
3299 * and sets trimmed parameter to non-zero value if all of string could not be
3300 * shown.
3301 *
3302 * Additionally, adds to coloffset how many many columns to move to align with
3303 * the expected position. Takes into account how multi-byte and double-width
3304 * characters will effect the cursor position.
3305 *
3306 * Returns the number of bytes to output from string to satisfy max_width. */
3307 static size_t
3308 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3309 {
3310 const char *start = string;
3311 const char *end = strchr(string, '\0');
3312 size_t mbwidth = 0;
3313 size_t width = 0;
3314
3315 *trimmed = 0;
3316
3317 while (string < end) {
3318 int c = *(unsigned char *) string;
3319 unsigned char bytes = utf8_bytes[c];
3320 size_t ucwidth;
3321 unsigned long unicode;
3322
3323 if (string + bytes > end)
3324 break;
3325
3326 /* Change representation to figure out whether
3327 * it is a single- or double-width character. */
3328
3329 unicode = utf8_to_unicode(string, bytes);
3330 /* FIXME: Graceful handling of invalid unicode character. */
3331 if (!unicode)
3332 break;
3333
3334 ucwidth = unicode_width(unicode);
3335 width += ucwidth;
3336 if (width > max_width) {
3337 *trimmed = 1;
3338 break;
3339 }
3340
3341 /* The column offset collects the differences between the
3342 * number of bytes encoding a character and the number of
3343 * columns will be used for rendering said character.
3344 *
3345 * So if some character A is encoded in 2 bytes, but will be
3346 * represented on the screen using only 1 byte this will and up
3347 * adding 1 to the multi-byte column offset.
3348 *
3349 * Assumes that no double-width character can be encoding in
3350 * less than two bytes. */
3351 if (bytes > ucwidth)
3352 mbwidth += bytes - ucwidth;
3353
3354 string += bytes;
3355 }
3356
3357 *coloffset += mbwidth;
3358
3359 return string - start;
3360 }
3361
3362
3363 /*
3364 * Status management
3365 */
3366
3367 /* Whether or not the curses interface has been initialized. */
3368 static bool cursed = FALSE;
3369
3370 /* The status window is used for polling keystrokes. */
3371 static WINDOW *status_win;
3372
3373 static bool status_empty = TRUE;
3374
3375 /* Update status and title window. */
3376 static void
3377 report(const char *msg, ...)
3378 {
3379 struct view *view = display[current_view];
3380
3381 if (input_mode)
3382 return;
3383
3384 if (!status_empty || *msg) {
3385 va_list args;
3386
3387 va_start(args, msg);
3388
3389 wmove(status_win, 0, 0);
3390 if (*msg) {
3391 vwprintw(status_win, msg, args);
3392 status_empty = FALSE;
3393 } else {
3394 status_empty = TRUE;
3395 }
3396 wclrtoeol(status_win);
3397 wrefresh(status_win);
3398
3399 va_end(args);
3400 }
3401
3402 update_view_title(view);
3403 update_display_cursor(view);
3404 }
3405
3406 /* Controls when nodelay should be in effect when polling user input. */
3407 static void
3408 set_nonblocking_input(bool loading)
3409 {
3410 static unsigned int loading_views;
3411
3412 if ((loading == FALSE && loading_views-- == 1) ||
3413 (loading == TRUE && loading_views++ == 0))
3414 nodelay(status_win, loading);
3415 }
3416
3417 static void
3418 init_display(void)
3419 {
3420 int x, y;
3421
3422 /* Initialize the curses library */
3423 if (isatty(STDIN_FILENO)) {
3424 cursed = !!initscr();
3425 } else {
3426 /* Leave stdin and stdout alone when acting as a pager. */
3427 FILE *io = fopen("/dev/tty", "r+");
3428
3429 if (!io)
3430 die("Failed to open /dev/tty");
3431 cursed = !!newterm(NULL, io, io);
3432 }
3433
3434 if (!cursed)
3435 die("Failed to initialize curses");
3436
3437 nonl(); /* Tell curses not to do NL->CR/NL on output */
3438 cbreak(); /* Take input chars one at a time, no wait for \n */
3439 noecho(); /* Don't echo input */
3440 leaveok(stdscr, TRUE);
3441
3442 if (has_colors())
3443 init_colors();
3444
3445 getmaxyx(stdscr, y, x);
3446 status_win = newwin(1, 0, y - 1, 0);
3447 if (!status_win)
3448 die("Failed to create status window");
3449
3450 /* Enable keyboard mapping */
3451 keypad(status_win, TRUE);
3452 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3453 }
3454
3455 static char *
3456 read_prompt(const char *prompt)
3457 {
3458 enum { READING, STOP, CANCEL } status = READING;
3459 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3460 int pos = 0;
3461
3462 while (status == READING) {
3463 struct view *view;
3464 int i, key;
3465
3466 input_mode = TRUE;
3467
3468 foreach_view (view, i)
3469 update_view(view);
3470
3471 input_mode = FALSE;
3472
3473 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
3474 wclrtoeol(status_win);
3475
3476 /* Refresh, accept single keystroke of input */
3477 key = wgetch(status_win);
3478 switch (key) {
3479 case KEY_RETURN:
3480 case KEY_ENTER:
3481 case '\n':
3482 status = pos ? STOP : CANCEL;
3483 break;
3484
3485 case KEY_BACKSPACE:
3486 if (pos > 0)
3487 pos--;
3488 else
3489 status = CANCEL;
3490 break;
3491
3492 case KEY_ESC:
3493 status = CANCEL;
3494 break;
3495
3496 case ERR:
3497 break;
3498
3499 default:
3500 if (pos >= sizeof(buf)) {
3501 report("Input string too long");
3502 return NULL;
3503 }
3504
3505 if (isprint(key))
3506 buf[pos++] = (char) key;
3507 }
3508 }
3509
3510 /* Clear the status window */
3511 status_empty = FALSE;
3512 report("");
3513
3514 if (status == CANCEL)
3515 return NULL;
3516
3517 buf[pos++] = 0;
3518
3519 return buf;
3520 }
3521
3522 /*
3523 * Repository references
3524 */
3525
3526 static struct ref *refs;
3527 static size_t refs_size;
3528
3529 /* Id <-> ref store */
3530 static struct ref ***id_refs;
3531 static size_t id_refs_size;
3532
3533 static struct ref **
3534 get_refs(char *id)
3535 {
3536 struct ref ***tmp_id_refs;
3537 struct ref **ref_list = NULL;
3538 size_t ref_list_size = 0;
3539 size_t i;
3540
3541 for (i = 0; i < id_refs_size; i++)
3542 if (!strcmp(id, id_refs[i][0]->id))
3543 return id_refs[i];
3544
3545 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3546 if (!tmp_id_refs)
3547 return NULL;
3548
3549 id_refs = tmp_id_refs;
3550
3551 for (i = 0; i < refs_size; i++) {
3552 struct ref **tmp;
3553
3554 if (strcmp(id, refs[i].id))
3555 continue;
3556
3557 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3558 if (!tmp) {
3559 if (ref_list)
3560 free(ref_list);
3561 return NULL;
3562 }
3563
3564 ref_list = tmp;
3565 if (ref_list_size > 0)
3566 ref_list[ref_list_size - 1]->next = 1;
3567 ref_list[ref_list_size] = &refs[i];
3568
3569 /* XXX: The properties of the commit chains ensures that we can
3570 * safely modify the shared ref. The repo references will
3571 * always be similar for the same id. */
3572 ref_list[ref_list_size]->next = 0;
3573 ref_list_size++;
3574 }
3575
3576 if (ref_list)
3577 id_refs[id_refs_size++] = ref_list;
3578
3579 return ref_list;
3580 }
3581
3582 static int
3583 read_ref(char *id, int idlen, char *name, int namelen)
3584 {
3585 struct ref *ref;
3586 bool tag = FALSE;
3587 bool remote = FALSE;
3588
3589 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3590 /* Commits referenced by tags has "^{}" appended. */
3591 if (name[namelen - 1] != '}')
3592 return OK;
3593
3594 while (namelen > 0 && name[namelen] != '^')
3595 namelen--;
3596
3597 tag = TRUE;
3598 namelen -= STRING_SIZE("refs/tags/");
3599 name += STRING_SIZE("refs/tags/");
3600
3601 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
3602 remote = TRUE;
3603 namelen -= STRING_SIZE("refs/remotes/");
3604 name += STRING_SIZE("refs/remotes/");
3605
3606 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3607 namelen -= STRING_SIZE("refs/heads/");
3608 name += STRING_SIZE("refs/heads/");
3609
3610 } else if (!strcmp(name, "HEAD")) {
3611 return OK;
3612 }
3613
3614 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3615 if (!refs)
3616 return ERR;
3617
3618 ref = &refs[refs_size++];
3619 ref->name = malloc(namelen + 1);
3620 if (!ref->name)
3621 return ERR;
3622
3623 strncpy(ref->name, name, namelen);
3624 ref->name[namelen] = 0;
3625 ref->tag = tag;
3626 ref->remote = remote;
3627 string_copy(ref->id, id);
3628
3629 return OK;
3630 }
3631
3632 static int
3633 load_refs(void)
3634 {
3635 const char *cmd_env = getenv("TIG_LS_REMOTE");
3636 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3637
3638 return read_properties(popen(cmd, "r"), "\t", read_ref);
3639 }
3640
3641 static int
3642 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3643 {
3644 if (!strcmp(name, "i18n.commitencoding"))
3645 string_copy(opt_encoding, value);
3646
3647 return OK;
3648 }
3649
3650 static int
3651 load_repo_config(void)
3652 {
3653 return read_properties(popen("git repo-config --list", "r"),
3654 "=", read_repo_config_option);
3655 }
3656
3657 static int
3658 read_properties(FILE *pipe, const char *separators,
3659 int (*read_property)(char *, int, char *, int))
3660 {
3661 char buffer[BUFSIZ];
3662 char *name;
3663 int state = OK;
3664
3665 if (!pipe)
3666 return ERR;
3667
3668 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3669 char *value;
3670 size_t namelen;
3671 size_t valuelen;
3672
3673 name = chomp_string(name);
3674 namelen = strcspn(name, separators);
3675
3676 if (name[namelen]) {
3677 name[namelen] = 0;
3678 value = chomp_string(name + namelen + 1);
3679 valuelen = strlen(value);
3680
3681 } else {
3682 value = "";
3683 valuelen = 0;
3684 }
3685
3686 state = read_property(name, namelen, value, valuelen);
3687 }
3688
3689 if (state != ERR && ferror(pipe))
3690 state = ERR;
3691
3692 pclose(pipe);
3693
3694 return state;
3695 }
3696
3697
3698 /*
3699 * Main
3700 */
3701
3702 static void __NORETURN
3703 quit(int sig)
3704 {
3705 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3706 if (cursed)
3707 endwin();
3708 exit(0);
3709 }
3710
3711 static void __NORETURN
3712 die(const char *err, ...)
3713 {
3714 va_list args;
3715
3716 endwin();
3717
3718 va_start(args, err);
3719 fputs("tig: ", stderr);
3720 vfprintf(stderr, err, args);
3721 fputs("\n", stderr);
3722 va_end(args);
3723
3724 exit(1);
3725 }
3726
3727 int
3728 main(int argc, char *argv[])
3729 {
3730 struct view *view;
3731 enum request request;
3732 size_t i;
3733
3734 signal(SIGINT, quit);
3735
3736 if (setlocale(LC_ALL, "")) {
3737 string_copy(opt_codeset, nl_langinfo(CODESET));
3738 }
3739
3740 if (load_options() == ERR)
3741 die("Failed to load user config.");
3742
3743 /* Load the repo config file so options can be overwritten from
3744 * the command line. */
3745 if (load_repo_config() == ERR)
3746 die("Failed to load repo config.");
3747
3748 if (!parse_options(argc, argv))
3749 return 0;
3750
3751 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3752 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3753 if (opt_iconv == ICONV_NONE)
3754 die("Failed to initialize character set conversion");
3755 }
3756
3757 if (load_refs() == ERR)
3758 die("Failed to load refs.");
3759
3760 /* Require a git repository unless when running in pager mode. */
3761 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3762 die("Not a git repository");
3763
3764 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3765 view->cmd_env = getenv(view->cmd_env);
3766
3767 request = opt_request;
3768
3769 init_display();
3770
3771 while (view_driver(display[current_view], request)) {
3772 int key;
3773 int i;
3774
3775 foreach_view (view, i)
3776 update_view(view);
3777
3778 /* Refresh, accept single keystroke of input */
3779 key = wgetch(status_win);
3780
3781 /* wgetch() with nodelay() enabled returns ERR when there's no
3782 * input. */
3783 if (key == ERR) {
3784 request = REQ_NONE;
3785 continue;
3786 }
3787
3788 request = get_keybinding(display[current_view]->keymap, key);
3789
3790 /* Some low-level request handling. This keeps access to
3791 * status_win restricted. */
3792 switch (request) {
3793 case REQ_PROMPT:
3794 {
3795 char *cmd = read_prompt(":");
3796
3797 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3798 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3799 opt_request = REQ_VIEW_DIFF;
3800 } else {
3801 opt_request = REQ_VIEW_PAGER;
3802 }
3803 break;
3804 }
3805
3806 request = REQ_NONE;
3807 break;
3808 }
3809 case REQ_SEARCH:
3810 case REQ_SEARCH_BACK:
3811 {
3812 const char *prompt = request == REQ_SEARCH
3813 ? "/" : "?";
3814 char *search = read_prompt(prompt);
3815
3816 if (search)
3817 string_copy(opt_search, search);
3818 else
3819 request = REQ_NONE;
3820 break;
3821 }
3822 case REQ_SCREEN_RESIZE:
3823 {
3824 int height, width;
3825
3826 getmaxyx(stdscr, height, width);
3827
3828 /* Resize the status view and let the view driver take
3829 * care of resizing the displayed views. */
3830 wresize(status_win, 1, width);
3831 mvwin(status_win, height - 1, 0);
3832 wrefresh(status_win);
3833 break;
3834 }
3835 default:
3836 break;
3837 }
3838 }
3839
3840 quit(0);
3841
3842 return 0;
3843 }
Full-screen terminal Git browser.