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Move space separator from get_key to formatting in open_help_view
[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 't' to open tree view");
2152 break;
2153 }
2154 /* Fall-through */
2155 case REQ_VIEW_MAIN:
2156 case REQ_VIEW_DIFF:
2157 case REQ_VIEW_LOG:
2158 case REQ_VIEW_TREE:
2159 case REQ_VIEW_HELP:
2160 case REQ_VIEW_PAGER:
2161 open_view(view, request, OPEN_DEFAULT);
2162 break;
2163
2164 case REQ_NEXT:
2165 case REQ_PREVIOUS:
2166 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2167
2168 if ((view == VIEW(REQ_VIEW_DIFF) &&
2169 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2170 (view == VIEW(REQ_VIEW_BLOB) &&
2171 view->parent == VIEW(REQ_VIEW_TREE))) {
2172 view = view->parent;
2173 move_view(view, request);
2174 if (view_is_displayed(view))
2175 update_view_title(view);
2176 } else {
2177 move_view(view, request);
2178 break;
2179 }
2180 /* Fall-through */
2181
2182 case REQ_ENTER:
2183 if (!view->lines) {
2184 report("Nothing to enter");
2185 break;
2186 }
2187 return view->ops->enter(view, &view->line[view->lineno]);
2188
2189 case REQ_VIEW_NEXT:
2190 {
2191 int nviews = displayed_views();
2192 int next_view = (current_view + 1) % nviews;
2193
2194 if (next_view == current_view) {
2195 report("Only one view is displayed");
2196 break;
2197 }
2198
2199 current_view = next_view;
2200 /* Blur out the title of the previous view. */
2201 update_view_title(view);
2202 report("");
2203 break;
2204 }
2205 case REQ_TOGGLE_LINENO:
2206 opt_line_number = !opt_line_number;
2207 redraw_display();
2208 break;
2209
2210 case REQ_TOGGLE_REV_GRAPH:
2211 opt_rev_graph = !opt_rev_graph;
2212 redraw_display();
2213 break;
2214
2215 case REQ_PROMPT:
2216 /* Always reload^Wrerun commands from the prompt. */
2217 open_view(view, opt_request, OPEN_RELOAD);
2218 break;
2219
2220 case REQ_SEARCH:
2221 case REQ_SEARCH_BACK:
2222 search_view(view, request);
2223 break;
2224
2225 case REQ_FIND_NEXT:
2226 case REQ_FIND_PREV:
2227 find_next(view, request);
2228 break;
2229
2230 case REQ_STOP_LOADING:
2231 for (i = 0; i < ARRAY_SIZE(views); i++) {
2232 view = &views[i];
2233 if (view->pipe)
2234 report("Stopped loading the %s view", view->name),
2235 end_update(view);
2236 }
2237 break;
2238
2239 case REQ_SHOW_VERSION:
2240 report("%s (built %s)", VERSION, __DATE__);
2241 return TRUE;
2242
2243 case REQ_SCREEN_RESIZE:
2244 resize_display();
2245 /* Fall-through */
2246 case REQ_SCREEN_REDRAW:
2247 redraw_display();
2248 break;
2249
2250 case REQ_NONE:
2251 doupdate();
2252 return TRUE;
2253
2254 case REQ_VIEW_CLOSE:
2255 /* XXX: Mark closed views by letting view->parent point to the
2256 * view itself. Parents to closed view should never be
2257 * followed. */
2258 if (view->parent &&
2259 view->parent->parent != view->parent) {
2260 memset(display, 0, sizeof(display));
2261 current_view = 0;
2262 display[current_view] = view->parent;
2263 view->parent = view;
2264 resize_display();
2265 redraw_display();
2266 break;
2267 }
2268 /* Fall-through */
2269 case REQ_QUIT:
2270 return FALSE;
2271
2272 default:
2273 /* An unknown key will show most commonly used commands. */
2274 report("Unknown key, press 'h' for help");
2275 return TRUE;
2276 }
2277
2278 return TRUE;
2279 }
2280
2281
2282 /*
2283 * Pager backend
2284 */
2285
2286 static bool
2287 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2288 {
2289 char *text = line->data;
2290 enum line_type type = line->type;
2291 int textlen = strlen(text);
2292 int attr;
2293
2294 wmove(view->win, lineno, 0);
2295
2296 if (selected) {
2297 type = LINE_CURSOR;
2298 wchgat(view->win, -1, 0, type, NULL);
2299 }
2300
2301 attr = get_line_attr(type);
2302 wattrset(view->win, attr);
2303
2304 if (opt_line_number || opt_tab_size < TABSIZE) {
2305 static char spaces[] = " ";
2306 int col_offset = 0, col = 0;
2307
2308 if (opt_line_number) {
2309 unsigned long real_lineno = view->offset + lineno + 1;
2310
2311 if (real_lineno == 1 ||
2312 (real_lineno % opt_num_interval) == 0) {
2313 wprintw(view->win, "%.*d", view->digits, real_lineno);
2314
2315 } else {
2316 waddnstr(view->win, spaces,
2317 MIN(view->digits, STRING_SIZE(spaces)));
2318 }
2319 waddstr(view->win, ": ");
2320 col_offset = view->digits + 2;
2321 }
2322
2323 while (text && col_offset + col < view->width) {
2324 int cols_max = view->width - col_offset - col;
2325 char *pos = text;
2326 int cols;
2327
2328 if (*text == '\t') {
2329 text++;
2330 assert(sizeof(spaces) > TABSIZE);
2331 pos = spaces;
2332 cols = opt_tab_size - (col % opt_tab_size);
2333
2334 } else {
2335 text = strchr(text, '\t');
2336 cols = line ? text - pos : strlen(pos);
2337 }
2338
2339 waddnstr(view->win, pos, MIN(cols, cols_max));
2340 col += cols;
2341 }
2342
2343 } else {
2344 int col = 0, pos = 0;
2345
2346 for (; pos < textlen && col < view->width; pos++, col++)
2347 if (text[pos] == '\t')
2348 col += TABSIZE - (col % TABSIZE) - 1;
2349
2350 waddnstr(view->win, text, pos);
2351 }
2352
2353 return TRUE;
2354 }
2355
2356 static bool
2357 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2358 {
2359 char refbuf[SIZEOF_STR];
2360 char *ref = NULL;
2361 FILE *pipe;
2362
2363 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2364 return TRUE;
2365
2366 pipe = popen(refbuf, "r");
2367 if (!pipe)
2368 return TRUE;
2369
2370 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2371 ref = chomp_string(ref);
2372 pclose(pipe);
2373
2374 if (!ref || !*ref)
2375 return TRUE;
2376
2377 /* This is the only fatal call, since it can "corrupt" the buffer. */
2378 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2379 return FALSE;
2380
2381 return TRUE;
2382 }
2383
2384 static void
2385 add_pager_refs(struct view *view, struct line *line)
2386 {
2387 char buf[SIZEOF_STR];
2388 char *commit_id = line->data + STRING_SIZE("commit ");
2389 struct ref **refs;
2390 size_t bufpos = 0, refpos = 0;
2391 const char *sep = "Refs: ";
2392 bool is_tag = FALSE;
2393
2394 assert(line->type == LINE_COMMIT);
2395
2396 refs = get_refs(commit_id);
2397 if (!refs) {
2398 if (view == VIEW(REQ_VIEW_DIFF))
2399 goto try_add_describe_ref;
2400 return;
2401 }
2402
2403 do {
2404 struct ref *ref = refs[refpos];
2405 char *fmt = ref->tag ? "%s[%s]" :
2406 ref->remote ? "%s<%s>" : "%s%s";
2407
2408 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2409 return;
2410 sep = ", ";
2411 if (ref->tag)
2412 is_tag = TRUE;
2413 } while (refs[refpos++]->next);
2414
2415 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2416 try_add_describe_ref:
2417 /* Add <tag>-g<commit_id> "fake" reference. */
2418 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2419 return;
2420 }
2421
2422 if (bufpos == 0)
2423 return;
2424
2425 if (!realloc_lines(view, view->line_size + 1))
2426 return;
2427
2428 add_line_text(view, buf, LINE_PP_REFS);
2429 }
2430
2431 static bool
2432 pager_read(struct view *view, char *data)
2433 {
2434 struct line *line;
2435
2436 if (!data)
2437 return TRUE;
2438
2439 line = add_line_text(view, data, get_line_type(data));
2440 if (!line)
2441 return FALSE;
2442
2443 if (line->type == LINE_COMMIT &&
2444 (view == VIEW(REQ_VIEW_DIFF) ||
2445 view == VIEW(REQ_VIEW_LOG)))
2446 add_pager_refs(view, line);
2447
2448 return TRUE;
2449 }
2450
2451 static bool
2452 pager_enter(struct view *view, struct line *line)
2453 {
2454 int split = 0;
2455
2456 if (line->type == LINE_COMMIT &&
2457 (view == VIEW(REQ_VIEW_LOG) ||
2458 view == VIEW(REQ_VIEW_PAGER))) {
2459 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2460 split = 1;
2461 }
2462
2463 /* Always scroll the view even if it was split. That way
2464 * you can use Enter to scroll through the log view and
2465 * split open each commit diff. */
2466 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2467
2468 /* FIXME: A minor workaround. Scrolling the view will call report("")
2469 * but if we are scrolling a non-current view this won't properly
2470 * update the view title. */
2471 if (split)
2472 update_view_title(view);
2473
2474 return TRUE;
2475 }
2476
2477 static bool
2478 pager_grep(struct view *view, struct line *line)
2479 {
2480 regmatch_t pmatch;
2481 char *text = line->data;
2482
2483 if (!*text)
2484 return FALSE;
2485
2486 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2487 return FALSE;
2488
2489 return TRUE;
2490 }
2491
2492 static void
2493 pager_select(struct view *view, struct line *line)
2494 {
2495 if (line->type == LINE_COMMIT) {
2496 char *text = line->data + STRING_SIZE("commit ");
2497
2498 if (view != VIEW(REQ_VIEW_PAGER))
2499 string_copy(view->ref, text);
2500 string_copy(ref_commit, text);
2501 }
2502 }
2503
2504 static struct view_ops pager_ops = {
2505 "line",
2506 pager_draw,
2507 pager_read,
2508 pager_enter,
2509 pager_grep,
2510 pager_select,
2511 };
2512
2513
2514 /*
2515 * Tree backend
2516 */
2517
2518 /* Parse output from git-ls-tree(1):
2519 *
2520 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2521 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2522 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2523 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2524 */
2525
2526 #define SIZEOF_TREE_ATTR \
2527 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2528
2529 #define TREE_UP_FORMAT "040000 tree %s\t.."
2530
2531 static int
2532 tree_compare_entry(enum line_type type1, char *name1,
2533 enum line_type type2, char *name2)
2534 {
2535 if (type1 != type2) {
2536 if (type1 == LINE_TREE_DIR)
2537 return -1;
2538 return 1;
2539 }
2540
2541 return strcmp(name1, name2);
2542 }
2543
2544 static bool
2545 tree_read(struct view *view, char *text)
2546 {
2547 size_t textlen = text ? strlen(text) : 0;
2548 char buf[SIZEOF_STR];
2549 unsigned long pos;
2550 enum line_type type;
2551 bool first_read = view->lines == 0;
2552
2553 if (textlen <= SIZEOF_TREE_ATTR)
2554 return FALSE;
2555
2556 type = text[STRING_SIZE("100644 ")] == 't'
2557 ? LINE_TREE_DIR : LINE_TREE_FILE;
2558
2559 if (first_read) {
2560 /* Add path info line */
2561 if (!string_format(buf, "Directory path /%s", opt_path) ||
2562 !realloc_lines(view, view->line_size + 1) ||
2563 !add_line_text(view, buf, LINE_DEFAULT))
2564 return FALSE;
2565
2566 /* Insert "link" to parent directory. */
2567 if (*opt_path) {
2568 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
2569 !realloc_lines(view, view->line_size + 1) ||
2570 !add_line_text(view, buf, LINE_TREE_DIR))
2571 return FALSE;
2572 }
2573 }
2574
2575 /* Strip the path part ... */
2576 if (*opt_path) {
2577 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2578 size_t striplen = strlen(opt_path);
2579 char *path = text + SIZEOF_TREE_ATTR;
2580
2581 if (pathlen > striplen)
2582 memmove(path, path + striplen,
2583 pathlen - striplen + 1);
2584 }
2585
2586 /* Skip "Directory ..." and ".." line. */
2587 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2588 struct line *line = &view->line[pos];
2589 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2590 char *path2 = text + SIZEOF_TREE_ATTR;
2591 int cmp = tree_compare_entry(line->type, path1, type, path2);
2592
2593 if (cmp <= 0)
2594 continue;
2595
2596 text = strdup(text);
2597 if (!text)
2598 return FALSE;
2599
2600 if (view->lines > pos)
2601 memmove(&view->line[pos + 1], &view->line[pos],
2602 (view->lines - pos) * sizeof(*line));
2603
2604 line = &view->line[pos];
2605 line->data = text;
2606 line->type = type;
2607 view->lines++;
2608 return TRUE;
2609 }
2610
2611 if (!add_line_text(view, text, type))
2612 return FALSE;
2613
2614 /* Move the current line to the first tree entry. */
2615 if (first_read)
2616 view->lineno++;
2617
2618 return TRUE;
2619 }
2620
2621 static bool
2622 tree_enter(struct view *view, struct line *line)
2623 {
2624 enum open_flags flags;
2625 enum request request;
2626
2627 switch (line->type) {
2628 case LINE_TREE_DIR:
2629 /* Depending on whether it is a subdir or parent (updir?) link
2630 * mangle the path buffer. */
2631 if (line == &view->line[1] && *opt_path) {
2632 size_t path_len = strlen(opt_path);
2633 char *dirsep = opt_path + path_len - 1;
2634
2635 while (dirsep > opt_path && dirsep[-1] != '/')
2636 dirsep--;
2637
2638 dirsep[0] = 0;
2639
2640 } else {
2641 size_t pathlen = strlen(opt_path);
2642 size_t origlen = pathlen;
2643 char *data = line->data;
2644 char *basename = data + SIZEOF_TREE_ATTR;
2645
2646 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2647 opt_path[origlen] = 0;
2648 return TRUE;
2649 }
2650 }
2651
2652 /* Trees and subtrees share the same ID, so they are not not
2653 * unique like blobs. */
2654 flags = OPEN_RELOAD;
2655 request = REQ_VIEW_TREE;
2656 break;
2657
2658 case LINE_TREE_FILE:
2659 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2660 request = REQ_VIEW_BLOB;
2661 break;
2662
2663 default:
2664 return TRUE;
2665 }
2666
2667 open_view(view, request, flags);
2668
2669 return TRUE;
2670 }
2671
2672 static void
2673 tree_select(struct view *view, struct line *line)
2674 {
2675 char *text = line->data + STRING_SIZE("100644 blob ");
2676
2677 if (line->type == LINE_TREE_FILE) {
2678 string_ncopy(ref_blob, text, 40);
2679
2680 } else if (line->type != LINE_TREE_DIR) {
2681 return;
2682 }
2683
2684 string_ncopy(view->ref, text, 40);
2685 }
2686
2687 static struct view_ops tree_ops = {
2688 "file",
2689 pager_draw,
2690 tree_read,
2691 tree_enter,
2692 pager_grep,
2693 tree_select,
2694 };
2695
2696 static bool
2697 blob_read(struct view *view, char *line)
2698 {
2699 return add_line_text(view, line, LINE_DEFAULT);
2700 }
2701
2702 static struct view_ops blob_ops = {
2703 "line",
2704 pager_draw,
2705 blob_read,
2706 pager_enter,
2707 pager_grep,
2708 pager_select,
2709 };
2710
2711
2712 /*
2713 * Revision graph
2714 */
2715
2716 struct commit {
2717 char id[SIZEOF_REV]; /* SHA1 ID. */
2718 char title[128]; /* First line of the commit message. */
2719 char author[75]; /* Author of the commit. */
2720 struct tm time; /* Date from the author ident. */
2721 struct ref **refs; /* Repository references. */
2722 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2723 size_t graph_size; /* The width of the graph array. */
2724 };
2725
2726 /* Size of rev graph with no "padding" columns */
2727 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
2728
2729 struct rev_graph {
2730 struct rev_graph *prev, *next, *parents;
2731 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
2732 size_t size;
2733 struct commit *commit;
2734 size_t pos;
2735 };
2736
2737 /* Parents of the commit being visualized. */
2738 static struct rev_graph graph_parents[4];
2739
2740 /* The current stack of revisions on the graph. */
2741 static struct rev_graph graph_stacks[4] = {
2742 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
2743 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
2744 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
2745 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
2746 };
2747
2748 static inline bool
2749 graph_parent_is_merge(struct rev_graph *graph)
2750 {
2751 return graph->parents->size > 1;
2752 }
2753
2754 static inline void
2755 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
2756 {
2757 struct commit *commit = graph->commit;
2758
2759 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
2760 commit->graph[commit->graph_size++] = symbol;
2761 }
2762
2763 static void
2764 done_rev_graph(struct rev_graph *graph)
2765 {
2766 if (graph_parent_is_merge(graph) &&
2767 graph->pos < graph->size - 1 &&
2768 graph->next->size == graph->size + graph->parents->size - 1) {
2769 size_t i = graph->pos + graph->parents->size - 1;
2770
2771 graph->commit->graph_size = i * 2;
2772 while (i < graph->next->size - 1) {
2773 append_to_rev_graph(graph, ' ');
2774 append_to_rev_graph(graph, '\\');
2775 i++;
2776 }
2777 }
2778
2779 graph->size = graph->pos = 0;
2780 graph->commit = NULL;
2781 memset(graph->parents, 0, sizeof(*graph->parents));
2782 }
2783
2784 static void
2785 push_rev_graph(struct rev_graph *graph, char *parent)
2786 {
2787 int i;
2788
2789 /* "Collapse" duplicate parents lines.
2790 *
2791 * FIXME: This needs to also update update the drawn graph but
2792 * for now it just serves as a method for pruning graph lines. */
2793 for (i = 0; i < graph->size; i++)
2794 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
2795 return;
2796
2797 if (graph->size < SIZEOF_REVITEMS) {
2798 string_ncopy(graph->rev[graph->size++], parent, SIZEOF_REV);
2799 }
2800 }
2801
2802 static chtype
2803 get_rev_graph_symbol(struct rev_graph *graph)
2804 {
2805 chtype symbol;
2806
2807 if (graph->parents->size == 0)
2808 symbol = REVGRAPH_INIT;
2809 else if (graph_parent_is_merge(graph))
2810 symbol = REVGRAPH_MERGE;
2811 else if (graph->pos >= graph->size)
2812 symbol = REVGRAPH_BRANCH;
2813 else
2814 symbol = REVGRAPH_COMMIT;
2815
2816 return symbol;
2817 }
2818
2819 static void
2820 draw_rev_graph(struct rev_graph *graph)
2821 {
2822 struct rev_filler {
2823 chtype separator, line;
2824 };
2825 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
2826 static struct rev_filler fillers[] = {
2827 { ' ', REVGRAPH_LINE },
2828 { '`', '.' },
2829 { '\'', ' ' },
2830 { '/', ' ' },
2831 };
2832 chtype symbol = get_rev_graph_symbol(graph);
2833 struct rev_filler *filler;
2834 size_t i;
2835
2836 filler = &fillers[DEFAULT];
2837
2838 for (i = 0; i < graph->pos; i++) {
2839 append_to_rev_graph(graph, filler->line);
2840 if (graph_parent_is_merge(graph->prev) &&
2841 graph->prev->pos == i)
2842 filler = &fillers[RSHARP];
2843
2844 append_to_rev_graph(graph, filler->separator);
2845 }
2846
2847 /* Place the symbol for this revision. */
2848 append_to_rev_graph(graph, symbol);
2849
2850 if (graph->prev->size > graph->size)
2851 filler = &fillers[RDIAG];
2852 else
2853 filler = &fillers[DEFAULT];
2854
2855 i++;
2856
2857 for (; i < graph->size; i++) {
2858 append_to_rev_graph(graph, filler->separator);
2859 append_to_rev_graph(graph, filler->line);
2860 if (graph_parent_is_merge(graph->prev) &&
2861 i < graph->prev->pos + graph->parents->size)
2862 filler = &fillers[RSHARP];
2863 if (graph->prev->size > graph->size)
2864 filler = &fillers[LDIAG];
2865 }
2866
2867 if (graph->prev->size > graph->size) {
2868 append_to_rev_graph(graph, filler->separator);
2869 if (filler->line != ' ')
2870 append_to_rev_graph(graph, filler->line);
2871 }
2872 }
2873
2874 /* Prepare the next rev graph */
2875 static void
2876 prepare_rev_graph(struct rev_graph *graph)
2877 {
2878 size_t i;
2879
2880 /* First, traverse all lines of revisions up to the active one. */
2881 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
2882 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
2883 break;
2884
2885 push_rev_graph(graph->next, graph->rev[graph->pos]);
2886 }
2887
2888 /* Interleave the new revision parent(s). */
2889 for (i = 0; i < graph->parents->size; i++)
2890 push_rev_graph(graph->next, graph->parents->rev[i]);
2891
2892 /* Lastly, put any remaining revisions. */
2893 for (i = graph->pos + 1; i < graph->size; i++)
2894 push_rev_graph(graph->next, graph->rev[i]);
2895 }
2896
2897 static void
2898 update_rev_graph(struct rev_graph *graph)
2899 {
2900 /* If this is the finalizing update ... */
2901 if (graph->commit)
2902 prepare_rev_graph(graph);
2903
2904 /* Graph visualization needs a one rev look-ahead,
2905 * so the first update doesn't visualize anything. */
2906 if (!graph->prev->commit)
2907 return;
2908
2909 draw_rev_graph(graph->prev);
2910 done_rev_graph(graph->prev->prev);
2911 }
2912
2913
2914 /*
2915 * Main view backend
2916 */
2917
2918 static bool
2919 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2920 {
2921 char buf[DATE_COLS + 1];
2922 struct commit *commit = line->data;
2923 enum line_type type;
2924 int col = 0;
2925 size_t timelen;
2926 size_t authorlen;
2927 int trimmed = 1;
2928
2929 if (!*commit->author)
2930 return FALSE;
2931
2932 wmove(view->win, lineno, col);
2933
2934 if (selected) {
2935 type = LINE_CURSOR;
2936 wattrset(view->win, get_line_attr(type));
2937 wchgat(view->win, -1, 0, type, NULL);
2938
2939 } else {
2940 type = LINE_MAIN_COMMIT;
2941 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2942 }
2943
2944 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2945 waddnstr(view->win, buf, timelen);
2946 waddstr(view->win, " ");
2947
2948 col += DATE_COLS;
2949 wmove(view->win, lineno, col);
2950 if (type != LINE_CURSOR)
2951 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2952
2953 if (opt_utf8) {
2954 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2955 } else {
2956 authorlen = strlen(commit->author);
2957 if (authorlen > AUTHOR_COLS - 2) {
2958 authorlen = AUTHOR_COLS - 2;
2959 trimmed = 1;
2960 }
2961 }
2962
2963 if (trimmed) {
2964 waddnstr(view->win, commit->author, authorlen);
2965 if (type != LINE_CURSOR)
2966 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2967 waddch(view->win, '~');
2968 } else {
2969 waddstr(view->win, commit->author);
2970 }
2971
2972 col += AUTHOR_COLS;
2973 if (type != LINE_CURSOR)
2974 wattrset(view->win, A_NORMAL);
2975
2976 if (opt_rev_graph && commit->graph_size) {
2977 size_t i;
2978
2979 wmove(view->win, lineno, col);
2980 /* Using waddch() instead of waddnstr() ensures that
2981 * they'll be rendered correctly for the cursor line. */
2982 for (i = 0; i < commit->graph_size; i++)
2983 waddch(view->win, commit->graph[i]);
2984
2985 waddch(view->win, ' ');
2986 col += commit->graph_size + 1;
2987 }
2988
2989 wmove(view->win, lineno, col);
2990
2991 if (commit->refs) {
2992 size_t i = 0;
2993
2994 do {
2995 if (type == LINE_CURSOR)
2996 ;
2997 else if (commit->refs[i]->tag)
2998 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2999 else if (commit->refs[i]->remote)
3000 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
3001 else
3002 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
3003 waddstr(view->win, "[");
3004 waddstr(view->win, commit->refs[i]->name);
3005 waddstr(view->win, "]");
3006 if (type != LINE_CURSOR)
3007 wattrset(view->win, A_NORMAL);
3008 waddstr(view->win, " ");
3009 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
3010 } while (commit->refs[i++]->next);
3011 }
3012
3013 if (type != LINE_CURSOR)
3014 wattrset(view->win, get_line_attr(type));
3015
3016 {
3017 int titlelen = strlen(commit->title);
3018
3019 if (col + titlelen > view->width)
3020 titlelen = view->width - col;
3021
3022 waddnstr(view->win, commit->title, titlelen);
3023 }
3024
3025 return TRUE;
3026 }
3027
3028 /* Reads git log --pretty=raw output and parses it into the commit struct. */
3029 static bool
3030 main_read(struct view *view, char *line)
3031 {
3032 static struct rev_graph *graph = graph_stacks;
3033 enum line_type type;
3034 struct commit *commit = view->lines
3035 ? view->line[view->lines - 1].data : NULL;
3036
3037 if (!line) {
3038 update_rev_graph(graph);
3039 return TRUE;
3040 }
3041
3042 type = get_line_type(line);
3043
3044 switch (type) {
3045 case LINE_COMMIT:
3046 commit = calloc(1, sizeof(struct commit));
3047 if (!commit)
3048 return FALSE;
3049
3050 line += STRING_SIZE("commit ");
3051
3052 view->line[view->lines++].data = commit;
3053 string_copy(commit->id, line);
3054 commit->refs = get_refs(commit->id);
3055 graph->commit = commit;
3056 break;
3057
3058 case LINE_PARENT:
3059 if (commit) {
3060 line += STRING_SIZE("parent ");
3061 push_rev_graph(graph->parents, line);
3062 }
3063 break;
3064
3065 case LINE_AUTHOR:
3066 {
3067 /* Parse author lines where the name may be empty:
3068 * author <email@address.tld> 1138474660 +0100
3069 */
3070 char *ident = line + STRING_SIZE("author ");
3071 char *nameend = strchr(ident, '<');
3072 char *emailend = strchr(ident, '>');
3073
3074 if (!commit || !nameend || !emailend)
3075 break;
3076
3077 update_rev_graph(graph);
3078 graph = graph->next;
3079
3080 *nameend = *emailend = 0;
3081 ident = chomp_string(ident);
3082 if (!*ident) {
3083 ident = chomp_string(nameend + 1);
3084 if (!*ident)
3085 ident = "Unknown";
3086 }
3087
3088 string_copy(commit->author, ident);
3089
3090 /* Parse epoch and timezone */
3091 if (emailend[1] == ' ') {
3092 char *secs = emailend + 2;
3093 char *zone = strchr(secs, ' ');
3094 time_t time = (time_t) atol(secs);
3095
3096 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3097 long tz;
3098
3099 zone++;
3100 tz = ('0' - zone[1]) * 60 * 60 * 10;
3101 tz += ('0' - zone[2]) * 60 * 60;
3102 tz += ('0' - zone[3]) * 60;
3103 tz += ('0' - zone[4]) * 60;
3104
3105 if (zone[0] == '-')
3106 tz = -tz;
3107
3108 time -= tz;
3109 }
3110
3111 gmtime_r(&time, &commit->time);
3112 }
3113 break;
3114 }
3115 default:
3116 if (!commit)
3117 break;
3118
3119 /* Fill in the commit title if it has not already been set. */
3120 if (commit->title[0])
3121 break;
3122
3123 /* Require titles to start with a non-space character at the
3124 * offset used by git log. */
3125 if (strncmp(line, " ", 4))
3126 break;
3127 line += 4;
3128 /* Well, if the title starts with a whitespace character,
3129 * try to be forgiving. Otherwise we end up with no title. */
3130 while (isspace(*line))
3131 line++;
3132 if (*line == '\0')
3133 break;
3134 /* FIXME: More graceful handling of titles; append "..." to
3135 * shortened titles, etc. */
3136
3137 string_copy(commit->title, line);
3138 }
3139
3140 return TRUE;
3141 }
3142
3143 static bool
3144 main_enter(struct view *view, struct line *line)
3145 {
3146 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3147
3148 open_view(view, REQ_VIEW_DIFF, flags);
3149 return TRUE;
3150 }
3151
3152 static bool
3153 main_grep(struct view *view, struct line *line)
3154 {
3155 struct commit *commit = line->data;
3156 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
3157 char buf[DATE_COLS + 1];
3158 regmatch_t pmatch;
3159
3160 for (state = S_TITLE; state < S_END; state++) {
3161 char *text;
3162
3163 switch (state) {
3164 case S_TITLE: text = commit->title; break;
3165 case S_AUTHOR: text = commit->author; break;
3166 case S_DATE:
3167 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
3168 continue;
3169 text = buf;
3170 break;
3171
3172 default:
3173 return FALSE;
3174 }
3175
3176 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3177 return TRUE;
3178 }
3179
3180 return FALSE;
3181 }
3182
3183 static void
3184 main_select(struct view *view, struct line *line)
3185 {
3186 struct commit *commit = line->data;
3187
3188 string_copy(view->ref, commit->id);
3189 string_copy(ref_commit, view->ref);
3190 }
3191
3192 static struct view_ops main_ops = {
3193 "commit",
3194 main_draw,
3195 main_read,
3196 main_enter,
3197 main_grep,
3198 main_select,
3199 };
3200
3201
3202 /*
3203 * Unicode / UTF-8 handling
3204 *
3205 * NOTE: Much of the following code for dealing with unicode is derived from
3206 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
3207 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
3208 */
3209
3210 /* I've (over)annotated a lot of code snippets because I am not entirely
3211 * confident that the approach taken by this small UTF-8 interface is correct.
3212 * --jonas */
3213
3214 static inline int
3215 unicode_width(unsigned long c)
3216 {
3217 if (c >= 0x1100 &&
3218 (c <= 0x115f /* Hangul Jamo */
3219 || c == 0x2329
3220 || c == 0x232a
3221 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
3222 /* CJK ... Yi */
3223 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
3224 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
3225 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
3226 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
3227 || (c >= 0xffe0 && c <= 0xffe6)
3228 || (c >= 0x20000 && c <= 0x2fffd)
3229 || (c >= 0x30000 && c <= 0x3fffd)))
3230 return 2;
3231
3232 return 1;
3233 }
3234
3235 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3236 * Illegal bytes are set one. */
3237 static const unsigned char utf8_bytes[256] = {
3238 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,
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 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,
3245 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,
3246 };
3247
3248 /* Decode UTF-8 multi-byte representation into a unicode character. */
3249 static inline unsigned long
3250 utf8_to_unicode(const char *string, size_t length)
3251 {
3252 unsigned long unicode;
3253
3254 switch (length) {
3255 case 1:
3256 unicode = string[0];
3257 break;
3258 case 2:
3259 unicode = (string[0] & 0x1f) << 6;
3260 unicode += (string[1] & 0x3f);
3261 break;
3262 case 3:
3263 unicode = (string[0] & 0x0f) << 12;
3264 unicode += ((string[1] & 0x3f) << 6);
3265 unicode += (string[2] & 0x3f);
3266 break;
3267 case 4:
3268 unicode = (string[0] & 0x0f) << 18;
3269 unicode += ((string[1] & 0x3f) << 12);
3270 unicode += ((string[2] & 0x3f) << 6);
3271 unicode += (string[3] & 0x3f);
3272 break;
3273 case 5:
3274 unicode = (string[0] & 0x0f) << 24;
3275 unicode += ((string[1] & 0x3f) << 18);
3276 unicode += ((string[2] & 0x3f) << 12);
3277 unicode += ((string[3] & 0x3f) << 6);
3278 unicode += (string[4] & 0x3f);
3279 break;
3280 case 6:
3281 unicode = (string[0] & 0x01) << 30;
3282 unicode += ((string[1] & 0x3f) << 24);
3283 unicode += ((string[2] & 0x3f) << 18);
3284 unicode += ((string[3] & 0x3f) << 12);
3285 unicode += ((string[4] & 0x3f) << 6);
3286 unicode += (string[5] & 0x3f);
3287 break;
3288 default:
3289 die("Invalid unicode length");
3290 }
3291
3292 /* Invalid characters could return the special 0xfffd value but NUL
3293 * should be just as good. */
3294 return unicode > 0xffff ? 0 : unicode;
3295 }
3296
3297 /* Calculates how much of string can be shown within the given maximum width
3298 * and sets trimmed parameter to non-zero value if all of string could not be
3299 * shown.
3300 *
3301 * Additionally, adds to coloffset how many many columns to move to align with
3302 * the expected position. Takes into account how multi-byte and double-width
3303 * characters will effect the cursor position.
3304 *
3305 * Returns the number of bytes to output from string to satisfy max_width. */
3306 static size_t
3307 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3308 {
3309 const char *start = string;
3310 const char *end = strchr(string, '\0');
3311 size_t mbwidth = 0;
3312 size_t width = 0;
3313
3314 *trimmed = 0;
3315
3316 while (string < end) {
3317 int c = *(unsigned char *) string;
3318 unsigned char bytes = utf8_bytes[c];
3319 size_t ucwidth;
3320 unsigned long unicode;
3321
3322 if (string + bytes > end)
3323 break;
3324
3325 /* Change representation to figure out whether
3326 * it is a single- or double-width character. */
3327
3328 unicode = utf8_to_unicode(string, bytes);
3329 /* FIXME: Graceful handling of invalid unicode character. */
3330 if (!unicode)
3331 break;
3332
3333 ucwidth = unicode_width(unicode);
3334 width += ucwidth;
3335 if (width > max_width) {
3336 *trimmed = 1;
3337 break;
3338 }
3339
3340 /* The column offset collects the differences between the
3341 * number of bytes encoding a character and the number of
3342 * columns will be used for rendering said character.
3343 *
3344 * So if some character A is encoded in 2 bytes, but will be
3345 * represented on the screen using only 1 byte this will and up
3346 * adding 1 to the multi-byte column offset.
3347 *
3348 * Assumes that no double-width character can be encoding in
3349 * less than two bytes. */
3350 if (bytes > ucwidth)
3351 mbwidth += bytes - ucwidth;
3352
3353 string += bytes;
3354 }
3355
3356 *coloffset += mbwidth;
3357
3358 return string - start;
3359 }
3360
3361
3362 /*
3363 * Status management
3364 */
3365
3366 /* Whether or not the curses interface has been initialized. */
3367 static bool cursed = FALSE;
3368
3369 /* The status window is used for polling keystrokes. */
3370 static WINDOW *status_win;
3371
3372 static bool status_empty = TRUE;
3373
3374 /* Update status and title window. */
3375 static void
3376 report(const char *msg, ...)
3377 {
3378 struct view *view = display[current_view];
3379
3380 if (input_mode)
3381 return;
3382
3383 if (!status_empty || *msg) {
3384 va_list args;
3385
3386 va_start(args, msg);
3387
3388 wmove(status_win, 0, 0);
3389 if (*msg) {
3390 vwprintw(status_win, msg, args);
3391 status_empty = FALSE;
3392 } else {
3393 status_empty = TRUE;
3394 }
3395 wclrtoeol(status_win);
3396 wrefresh(status_win);
3397
3398 va_end(args);
3399 }
3400
3401 update_view_title(view);
3402 update_display_cursor(view);
3403 }
3404
3405 /* Controls when nodelay should be in effect when polling user input. */
3406 static void
3407 set_nonblocking_input(bool loading)
3408 {
3409 static unsigned int loading_views;
3410
3411 if ((loading == FALSE && loading_views-- == 1) ||
3412 (loading == TRUE && loading_views++ == 0))
3413 nodelay(status_win, loading);
3414 }
3415
3416 static void
3417 init_display(void)
3418 {
3419 int x, y;
3420
3421 /* Initialize the curses library */
3422 if (isatty(STDIN_FILENO)) {
3423 cursed = !!initscr();
3424 } else {
3425 /* Leave stdin and stdout alone when acting as a pager. */
3426 FILE *io = fopen("/dev/tty", "r+");
3427
3428 if (!io)
3429 die("Failed to open /dev/tty");
3430 cursed = !!newterm(NULL, io, io);
3431 }
3432
3433 if (!cursed)
3434 die("Failed to initialize curses");
3435
3436 nonl(); /* Tell curses not to do NL->CR/NL on output */
3437 cbreak(); /* Take input chars one at a time, no wait for \n */
3438 noecho(); /* Don't echo input */
3439 leaveok(stdscr, TRUE);
3440
3441 if (has_colors())
3442 init_colors();
3443
3444 getmaxyx(stdscr, y, x);
3445 status_win = newwin(1, 0, y - 1, 0);
3446 if (!status_win)
3447 die("Failed to create status window");
3448
3449 /* Enable keyboard mapping */
3450 keypad(status_win, TRUE);
3451 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3452 }
3453
3454 static char *
3455 read_prompt(const char *prompt)
3456 {
3457 enum { READING, STOP, CANCEL } status = READING;
3458 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3459 int pos = 0;
3460
3461 while (status == READING) {
3462 struct view *view;
3463 int i, key;
3464
3465 input_mode = TRUE;
3466
3467 foreach_view (view, i)
3468 update_view(view);
3469
3470 input_mode = FALSE;
3471
3472 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
3473 wclrtoeol(status_win);
3474
3475 /* Refresh, accept single keystroke of input */
3476 key = wgetch(status_win);
3477 switch (key) {
3478 case KEY_RETURN:
3479 case KEY_ENTER:
3480 case '\n':
3481 status = pos ? STOP : CANCEL;
3482 break;
3483
3484 case KEY_BACKSPACE:
3485 if (pos > 0)
3486 pos--;
3487 else
3488 status = CANCEL;
3489 break;
3490
3491 case KEY_ESC:
3492 status = CANCEL;
3493 break;
3494
3495 case ERR:
3496 break;
3497
3498 default:
3499 if (pos >= sizeof(buf)) {
3500 report("Input string too long");
3501 return NULL;
3502 }
3503
3504 if (isprint(key))
3505 buf[pos++] = (char) key;
3506 }
3507 }
3508
3509 /* Clear the status window */
3510 status_empty = FALSE;
3511 report("");
3512
3513 if (status == CANCEL)
3514 return NULL;
3515
3516 buf[pos++] = 0;
3517
3518 return buf;
3519 }
3520
3521 /*
3522 * Repository references
3523 */
3524
3525 static struct ref *refs;
3526 static size_t refs_size;
3527
3528 /* Id <-> ref store */
3529 static struct ref ***id_refs;
3530 static size_t id_refs_size;
3531
3532 static struct ref **
3533 get_refs(char *id)
3534 {
3535 struct ref ***tmp_id_refs;
3536 struct ref **ref_list = NULL;
3537 size_t ref_list_size = 0;
3538 size_t i;
3539
3540 for (i = 0; i < id_refs_size; i++)
3541 if (!strcmp(id, id_refs[i][0]->id))
3542 return id_refs[i];
3543
3544 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3545 if (!tmp_id_refs)
3546 return NULL;
3547
3548 id_refs = tmp_id_refs;
3549
3550 for (i = 0; i < refs_size; i++) {
3551 struct ref **tmp;
3552
3553 if (strcmp(id, refs[i].id))
3554 continue;
3555
3556 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3557 if (!tmp) {
3558 if (ref_list)
3559 free(ref_list);
3560 return NULL;
3561 }
3562
3563 ref_list = tmp;
3564 if (ref_list_size > 0)
3565 ref_list[ref_list_size - 1]->next = 1;
3566 ref_list[ref_list_size] = &refs[i];
3567
3568 /* XXX: The properties of the commit chains ensures that we can
3569 * safely modify the shared ref. The repo references will
3570 * always be similar for the same id. */
3571 ref_list[ref_list_size]->next = 0;
3572 ref_list_size++;
3573 }
3574
3575 if (ref_list)
3576 id_refs[id_refs_size++] = ref_list;
3577
3578 return ref_list;
3579 }
3580
3581 static int
3582 read_ref(char *id, int idlen, char *name, int namelen)
3583 {
3584 struct ref *ref;
3585 bool tag = FALSE;
3586 bool remote = FALSE;
3587
3588 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3589 /* Commits referenced by tags has "^{}" appended. */
3590 if (name[namelen - 1] != '}')
3591 return OK;
3592
3593 while (namelen > 0 && name[namelen] != '^')
3594 namelen--;
3595
3596 tag = TRUE;
3597 namelen -= STRING_SIZE("refs/tags/");
3598 name += STRING_SIZE("refs/tags/");
3599
3600 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
3601 remote = TRUE;
3602 namelen -= STRING_SIZE("refs/remotes/");
3603 name += STRING_SIZE("refs/remotes/");
3604
3605 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3606 namelen -= STRING_SIZE("refs/heads/");
3607 name += STRING_SIZE("refs/heads/");
3608
3609 } else if (!strcmp(name, "HEAD")) {
3610 return OK;
3611 }
3612
3613 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3614 if (!refs)
3615 return ERR;
3616
3617 ref = &refs[refs_size++];
3618 ref->name = malloc(namelen + 1);
3619 if (!ref->name)
3620 return ERR;
3621
3622 strncpy(ref->name, name, namelen);
3623 ref->name[namelen] = 0;
3624 ref->tag = tag;
3625 ref->remote = remote;
3626 string_copy(ref->id, id);
3627
3628 return OK;
3629 }
3630
3631 static int
3632 load_refs(void)
3633 {
3634 const char *cmd_env = getenv("TIG_LS_REMOTE");
3635 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3636
3637 return read_properties(popen(cmd, "r"), "\t", read_ref);
3638 }
3639
3640 static int
3641 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3642 {
3643 if (!strcmp(name, "i18n.commitencoding"))
3644 string_copy(opt_encoding, value);
3645
3646 return OK;
3647 }
3648
3649 static int
3650 load_repo_config(void)
3651 {
3652 return read_properties(popen("git repo-config --list", "r"),
3653 "=", read_repo_config_option);
3654 }
3655
3656 static int
3657 read_properties(FILE *pipe, const char *separators,
3658 int (*read_property)(char *, int, char *, int))
3659 {
3660 char buffer[BUFSIZ];
3661 char *name;
3662 int state = OK;
3663
3664 if (!pipe)
3665 return ERR;
3666
3667 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3668 char *value;
3669 size_t namelen;
3670 size_t valuelen;
3671
3672 name = chomp_string(name);
3673 namelen = strcspn(name, separators);
3674
3675 if (name[namelen]) {
3676 name[namelen] = 0;
3677 value = chomp_string(name + namelen + 1);
3678 valuelen = strlen(value);
3679
3680 } else {
3681 value = "";
3682 valuelen = 0;
3683 }
3684
3685 state = read_property(name, namelen, value, valuelen);
3686 }
3687
3688 if (state != ERR && ferror(pipe))
3689 state = ERR;
3690
3691 pclose(pipe);
3692
3693 return state;
3694 }
3695
3696
3697 /*
3698 * Main
3699 */
3700
3701 static void __NORETURN
3702 quit(int sig)
3703 {
3704 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3705 if (cursed)
3706 endwin();
3707 exit(0);
3708 }
3709
3710 static void __NORETURN
3711 die(const char *err, ...)
3712 {
3713 va_list args;
3714
3715 endwin();
3716
3717 va_start(args, err);
3718 fputs("tig: ", stderr);
3719 vfprintf(stderr, err, args);
3720 fputs("\n", stderr);
3721 va_end(args);
3722
3723 exit(1);
3724 }
3725
3726 int
3727 main(int argc, char *argv[])
3728 {
3729 struct view *view;
3730 enum request request;
3731 size_t i;
3732
3733 signal(SIGINT, quit);
3734
3735 if (setlocale(LC_ALL, "")) {
3736 string_copy(opt_codeset, nl_langinfo(CODESET));
3737 }
3738
3739 if (load_options() == ERR)
3740 die("Failed to load user config.");
3741
3742 /* Load the repo config file so options can be overwritten from
3743 * the command line. */
3744 if (load_repo_config() == ERR)
3745 die("Failed to load repo config.");
3746
3747 if (!parse_options(argc, argv))
3748 return 0;
3749
3750 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3751 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3752 if (opt_iconv == ICONV_NONE)
3753 die("Failed to initialize character set conversion");
3754 }
3755
3756 if (load_refs() == ERR)
3757 die("Failed to load refs.");
3758
3759 /* Require a git repository unless when running in pager mode. */
3760 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3761 die("Not a git repository");
3762
3763 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3764 view->cmd_env = getenv(view->cmd_env);
3765
3766 request = opt_request;
3767
3768 init_display();
3769
3770 while (view_driver(display[current_view], request)) {
3771 int key;
3772 int i;
3773
3774 foreach_view (view, i)
3775 update_view(view);
3776
3777 /* Refresh, accept single keystroke of input */
3778 key = wgetch(status_win);
3779
3780 /* wgetch() with nodelay() enabled returns ERR when there's no
3781 * input. */
3782 if (key == ERR) {
3783 request = REQ_NONE;
3784 continue;
3785 }
3786
3787 request = get_keybinding(display[current_view]->keymap, key);
3788
3789 /* Some low-level request handling. This keeps access to
3790 * status_win restricted. */
3791 switch (request) {
3792 case REQ_PROMPT:
3793 {
3794 char *cmd = read_prompt(":");
3795
3796 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3797 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3798 opt_request = REQ_VIEW_DIFF;
3799 } else {
3800 opt_request = REQ_VIEW_PAGER;
3801 }
3802 break;
3803 }
3804
3805 request = REQ_NONE;
3806 break;
3807 }
3808 case REQ_SEARCH:
3809 case REQ_SEARCH_BACK:
3810 {
3811 const char *prompt = request == REQ_SEARCH
3812 ? "/" : "?";
3813 char *search = read_prompt(prompt);
3814
3815 if (search)
3816 string_copy(opt_search, search);
3817 else
3818 request = REQ_NONE;
3819 break;
3820 }
3821 case REQ_SCREEN_RESIZE:
3822 {
3823 int height, width;
3824
3825 getmaxyx(stdscr, height, width);
3826
3827 /* Resize the status view and let the view driver take
3828 * care of resizing the displayed views. */
3829 wresize(status_win, 1, width);
3830 mvwin(status_win, height - 1, 0);
3831 wrefresh(status_win);
3832 break;
3833 }
3834 default:
3835 break;
3836 }
3837 }
3838
3839 quit(0);
3840
3841 return 0;
3842 }
Full-screen terminal Git browser.