~mdw / tig / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
Allow strings to be enclosed in either ' or "
[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-0.3"
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 <curses.h>
34
35 #if __GNUC__ >= 3
36 #define __NORETURN __attribute__((__noreturn__))
37 #else
38 #define __NORETURN
39 #endif
40
41 static void __NORETURN die(const char *err, ...);
42 static void report(const char *msg, ...);
43 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
44 static void set_nonblocking_input(bool loading);
45 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
46
47 #define ABS(x) ((x) >= 0 ? (x) : -(x))
48 #define MIN(x, y) ((x) < (y) ? (x) : (y))
49
50 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
51 #define STRING_SIZE(x) (sizeof(x) - 1)
52
53 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
54 #define SIZEOF_CMD 1024 /* Size of command buffer. */
55 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
56
57 /* This color name can be used to refer to the default term colors. */
58 #define COLOR_DEFAULT (-1)
59
60 /* The format and size of the date column in the main view. */
61 #define DATE_FORMAT "%Y-%m-%d %H:%M"
62 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
63
64 #define AUTHOR_COLS 20
65
66 /* The default interval between line numbers. */
67 #define NUMBER_INTERVAL 1
68
69 #define TABSIZE 8
70
71 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
72
73 #define TIG_LS_REMOTE \
74 "git ls-remote . 2>/dev/null"
75
76 #define TIG_DIFF_CMD \
77 "git show --patch-with-stat --find-copies-harder -B -C %s"
78
79 #define TIG_LOG_CMD \
80 "git log --cc --stat -n100 %s"
81
82 #define TIG_MAIN_CMD \
83 "git log --topo-order --stat --pretty=raw %s"
84
85 /* XXX: Needs to be defined to the empty string. */
86 #define TIG_HELP_CMD ""
87 #define TIG_PAGER_CMD ""
88
89 /* Some ascii-shorthands fitted into the ncurses namespace. */
90 #define KEY_TAB '\t'
91 #define KEY_RETURN '\r'
92 #define KEY_ESC 27
93
94
95 struct ref {
96 char *name; /* Ref name; tag or head names are shortened. */
97 char id[41]; /* Commit SHA1 ID */
98 unsigned int tag:1; /* Is it a tag? */
99 unsigned int next:1; /* For ref lists: are there more refs? */
100 };
101
102 static struct ref **get_refs(char *id);
103
104 struct int_map {
105 const char *name;
106 int namelen;
107 int value;
108 };
109
110 static int
111 set_from_int_map(struct int_map *map, size_t map_size,
112 int *value, const char *name, int namelen)
113 {
114
115 int i;
116
117 for (i = 0; i < map_size; i++)
118 if (namelen == map[i].namelen &&
119 !strncasecmp(name, map[i].name, namelen)) {
120 *value = map[i].value;
121 return OK;
122 }
123
124 return ERR;
125 }
126
127
128 /*
129 * String helpers
130 */
131
132 static inline void
133 string_ncopy(char *dst, const char *src, int dstlen)
134 {
135 strncpy(dst, src, dstlen - 1);
136 dst[dstlen - 1] = 0;
137
138 }
139
140 /* Shorthand for safely copying into a fixed buffer. */
141 #define string_copy(dst, src) \
142 string_ncopy(dst, src, sizeof(dst))
143
144 static char *
145 chomp_string(char *name)
146 {
147 int namelen;
148
149 while (isspace(*name))
150 name++;
151
152 namelen = strlen(name) - 1;
153 while (namelen > 0 && isspace(name[namelen]))
154 name[namelen--] = 0;
155
156 return name;
157 }
158
159 static bool
160 string_nformat(char *buf, size_t bufsize, int *bufpos, const char *fmt, ...)
161 {
162 va_list args;
163 int pos = bufpos ? *bufpos : 0;
164
165 va_start(args, fmt);
166 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
167 va_end(args);
168
169 if (bufpos)
170 *bufpos = pos;
171
172 return pos >= bufsize ? FALSE : TRUE;
173 }
174
175 #define string_format(buf, fmt, args...) \
176 string_nformat(buf, sizeof(buf), NULL, fmt, args)
177
178 #define string_format_from(buf, from, fmt, args...) \
179 string_nformat(buf, sizeof(buf), from, fmt, args)
180
181 static int
182 string_enum_compare(const char *str1, const char *str2, int len)
183 {
184 size_t i;
185
186 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
187
188 /* Diff-Header == DIFF_HEADER */
189 for (i = 0; i < len; i++) {
190 if (toupper(str1[i]) == toupper(str2[i]))
191 continue;
192
193 if (string_enum_sep(str1[i]) &&
194 string_enum_sep(str2[i]))
195 continue;
196
197 return str1[i] - str2[i];
198 }
199
200 return 0;
201 }
202
203 /* Shell quoting
204 *
205 * NOTE: The following is a slightly modified copy of the git project's shell
206 * quoting routines found in the quote.c file.
207 *
208 * Help to copy the thing properly quoted for the shell safety. any single
209 * quote is replaced with '\'', any exclamation point is replaced with '\!',
210 * and the whole thing is enclosed in a
211 *
212 * E.g.
213 * original sq_quote result
214 * name ==> name ==> 'name'
215 * a b ==> a b ==> 'a b'
216 * a'b ==> a'\''b ==> 'a'\''b'
217 * a!b ==> a'\!'b ==> 'a'\!'b'
218 */
219
220 static size_t
221 sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
222 {
223 char c;
224
225 #define BUFPUT(x) do { if (bufsize < SIZEOF_CMD) buf[bufsize++] = (x); } while (0)
226
227 BUFPUT('\'');
228 while ((c = *src++)) {
229 if (c == '\'' || c == '!') {
230 BUFPUT('\'');
231 BUFPUT('\\');
232 BUFPUT(c);
233 BUFPUT('\'');
234 } else {
235 BUFPUT(c);
236 }
237 }
238 BUFPUT('\'');
239
240 return bufsize;
241 }
242
243
244 /*
245 * User requests
246 */
247
248 #define REQ_INFO \
249 /* XXX: Keep the view request first and in sync with views[]. */ \
250 REQ_GROUP("View switching") \
251 REQ_(VIEW_MAIN, "Show main view"), \
252 REQ_(VIEW_DIFF, "Show diff view"), \
253 REQ_(VIEW_LOG, "Show log view"), \
254 REQ_(VIEW_HELP, "Show help page"), \
255 REQ_(VIEW_PAGER, "Show pager view"), \
256 \
257 REQ_GROUP("View manipulation") \
258 REQ_(ENTER, "Enter current line and scroll"), \
259 REQ_(NEXT, "Move to next"), \
260 REQ_(PREVIOUS, "Move to previous"), \
261 REQ_(VIEW_NEXT, "Move focus to next view"), \
262 REQ_(VIEW_CLOSE, "Close the current view"), \
263 REQ_(QUIT, "Close all views and quit"), \
264 \
265 REQ_GROUP("Cursor navigation") \
266 REQ_(MOVE_UP, "Move cursor one line up"), \
267 REQ_(MOVE_DOWN, "Move cursor one line down"), \
268 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
269 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
270 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
271 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
272 \
273 REQ_GROUP("Scrolling") \
274 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
275 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
276 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
277 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
278 \
279 REQ_GROUP("Misc") \
280 REQ_(PROMPT, "Bring up the prompt"), \
281 REQ_(SCREEN_UPDATE, "Update the screen"), \
282 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
283 REQ_(SCREEN_RESIZE, "Resize the screen"), \
284 REQ_(SHOW_VERSION, "Show version information"), \
285 REQ_(STOP_LOADING, "Stop all loading views"), \
286 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
287 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
288
289
290 /* User action requests. */
291 enum request {
292 #define REQ_GROUP(help)
293 #define REQ_(req, help) REQ_##req
294
295 /* Offset all requests to avoid conflicts with ncurses getch values. */
296 REQ_OFFSET = KEY_MAX + 1,
297 REQ_INFO,
298 REQ_UNKNOWN,
299
300 #undef REQ_GROUP
301 #undef REQ_
302 };
303
304 struct request_info {
305 enum request request;
306 char *name;
307 int namelen;
308 char *help;
309 };
310
311 static struct request_info req_info[] = {
312 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
313 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
314 REQ_INFO
315 #undef REQ_GROUP
316 #undef REQ_
317 };
318
319 static enum request
320 get_request(const char *name)
321 {
322 int namelen = strlen(name);
323 int i;
324
325 for (i = 0; i < ARRAY_SIZE(req_info); i++)
326 if (req_info[i].namelen == namelen &&
327 !string_enum_compare(req_info[i].name, name, namelen))
328 return req_info[i].request;
329
330 return REQ_UNKNOWN;
331 }
332
333
334 /*
335 * Options
336 */
337
338 static const char usage[] =
339 VERSION " (" __DATE__ ")\n"
340 "\n"
341 "Usage: tig [options]\n"
342 " or: tig [options] [--] [git log options]\n"
343 " or: tig [options] log [git log options]\n"
344 " or: tig [options] diff [git diff options]\n"
345 " or: tig [options] show [git show options]\n"
346 " or: tig [options] < [git command output]\n"
347 "\n"
348 "Options:\n"
349 " -l Start up in log view\n"
350 " -d Start up in diff view\n"
351 " -n[I], --line-number[=I] Show line numbers with given interval\n"
352 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
353 " -- Mark end of tig options\n"
354 " -v, --version Show version and exit\n"
355 " -h, --help Show help message and exit\n";
356
357 /* Option and state variables. */
358 static bool opt_line_number = FALSE;
359 static bool opt_rev_graph = TRUE;
360 static int opt_num_interval = NUMBER_INTERVAL;
361 static int opt_tab_size = TABSIZE;
362 static enum request opt_request = REQ_VIEW_MAIN;
363 static char opt_cmd[SIZEOF_CMD] = "";
364 static char opt_encoding[20] = "";
365 static bool opt_utf8 = TRUE;
366 static FILE *opt_pipe = NULL;
367
368 enum option_type {
369 OPT_NONE,
370 OPT_INT,
371 };
372
373 static bool
374 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
375 {
376 va_list args;
377 char *value = "";
378 int *number;
379
380 if (opt[0] != '-')
381 return FALSE;
382
383 if (opt[1] == '-') {
384 int namelen = strlen(name);
385
386 opt += 2;
387
388 if (strncmp(opt, name, namelen))
389 return FALSE;
390
391 if (opt[namelen] == '=')
392 value = opt + namelen + 1;
393
394 } else {
395 if (!short_name || opt[1] != short_name)
396 return FALSE;
397 value = opt + 2;
398 }
399
400 va_start(args, type);
401 if (type == OPT_INT) {
402 number = va_arg(args, int *);
403 if (isdigit(*value))
404 *number = atoi(value);
405 }
406 va_end(args);
407
408 return TRUE;
409 }
410
411 /* Returns the index of log or diff command or -1 to exit. */
412 static bool
413 parse_options(int argc, char *argv[])
414 {
415 int i;
416
417 for (i = 1; i < argc; i++) {
418 char *opt = argv[i];
419
420 if (!strcmp(opt, "-l")) {
421 opt_request = REQ_VIEW_LOG;
422 continue;
423 }
424
425 if (!strcmp(opt, "-d")) {
426 opt_request = REQ_VIEW_DIFF;
427 continue;
428 }
429
430 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
431 opt_line_number = TRUE;
432 continue;
433 }
434
435 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
436 opt_tab_size = MIN(opt_tab_size, TABSIZE);
437 continue;
438 }
439
440 if (check_option(opt, 'v', "version", OPT_NONE)) {
441 printf("tig version %s\n", VERSION);
442 return FALSE;
443 }
444
445 if (check_option(opt, 'h', "help", OPT_NONE)) {
446 printf(usage);
447 return FALSE;
448 }
449
450 if (!strcmp(opt, "--")) {
451 i++;
452 break;
453 }
454
455 if (!strcmp(opt, "log") ||
456 !strcmp(opt, "diff") ||
457 !strcmp(opt, "show")) {
458 opt_request = opt[0] == 'l'
459 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
460 break;
461 }
462
463 if (opt[0] && opt[0] != '-')
464 break;
465
466 die("unknown option '%s'\n\n%s", opt, usage);
467 }
468
469 if (!isatty(STDIN_FILENO)) {
470 opt_request = REQ_VIEW_PAGER;
471 opt_pipe = stdin;
472
473 } else if (i < argc) {
474 size_t buf_size;
475
476 if (opt_request == REQ_VIEW_MAIN)
477 /* XXX: This is vulnerable to the user overriding
478 * options required for the main view parser. */
479 string_copy(opt_cmd, "git log --stat --pretty=raw");
480 else
481 string_copy(opt_cmd, "git");
482 buf_size = strlen(opt_cmd);
483
484 while (buf_size < sizeof(opt_cmd) && i < argc) {
485 opt_cmd[buf_size++] = ' ';
486 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
487 }
488
489 if (buf_size >= sizeof(opt_cmd))
490 die("command too long");
491
492 opt_cmd[buf_size] = 0;
493
494 }
495
496 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
497 opt_utf8 = FALSE;
498
499 return TRUE;
500 }
501
502
503 /*
504 * Line-oriented content detection.
505 */
506
507 #define LINE_INFO \
508 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
509 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
510 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
511 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
512 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
513 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
514 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
515 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
516 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
517 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
518 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
519 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
520 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
521 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
522 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
523 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
524 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
525 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
526 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
527 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
528 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
529 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
530 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
531 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
532 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
533 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
534 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
535 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
536 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
537 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
538 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
539 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
540 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
541 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
542 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
543 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
544 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
545 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
546
547 enum line_type {
548 #define LINE(type, line, fg, bg, attr) \
549 LINE_##type
550 LINE_INFO
551 #undef LINE
552 };
553
554 struct line_info {
555 const char *name; /* Option name. */
556 int namelen; /* Size of option name. */
557 const char *line; /* The start of line to match. */
558 int linelen; /* Size of string to match. */
559 int fg, bg, attr; /* Color and text attributes for the lines. */
560 };
561
562 static struct line_info line_info[] = {
563 #define LINE(type, line, fg, bg, attr) \
564 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
565 LINE_INFO
566 #undef LINE
567 };
568
569 static enum line_type
570 get_line_type(char *line)
571 {
572 int linelen = strlen(line);
573 enum line_type type;
574
575 for (type = 0; type < ARRAY_SIZE(line_info); type++)
576 /* Case insensitive search matches Signed-off-by lines better. */
577 if (linelen >= line_info[type].linelen &&
578 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
579 return type;
580
581 return LINE_DEFAULT;
582 }
583
584 static inline int
585 get_line_attr(enum line_type type)
586 {
587 assert(type < ARRAY_SIZE(line_info));
588 return COLOR_PAIR(type) | line_info[type].attr;
589 }
590
591 static struct line_info *
592 get_line_info(char *name, int namelen)
593 {
594 enum line_type type;
595
596 for (type = 0; type < ARRAY_SIZE(line_info); type++)
597 if (namelen == line_info[type].namelen &&
598 !string_enum_compare(line_info[type].name, name, namelen))
599 return &line_info[type];
600
601 return NULL;
602 }
603
604 static void
605 init_colors(void)
606 {
607 int default_bg = COLOR_BLACK;
608 int default_fg = COLOR_WHITE;
609 enum line_type type;
610
611 start_color();
612
613 if (use_default_colors() != ERR) {
614 default_bg = -1;
615 default_fg = -1;
616 }
617
618 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
619 struct line_info *info = &line_info[type];
620 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
621 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
622
623 init_pair(type, fg, bg);
624 }
625 }
626
627 struct line {
628 enum line_type type;
629 void *data; /* User data */
630 };
631
632
633 /*
634 * Keys
635 */
636
637 struct keybinding {
638 int alias;
639 enum request request;
640 struct keybinding *next;
641 };
642
643 static struct keybinding default_keybindings[] = {
644 /* View switching */
645 { 'm', REQ_VIEW_MAIN },
646 { 'd', REQ_VIEW_DIFF },
647 { 'l', REQ_VIEW_LOG },
648 { 'p', REQ_VIEW_PAGER },
649 { 'h', REQ_VIEW_HELP },
650 { '?', REQ_VIEW_HELP },
651
652 /* View manipulation */
653 { 'q', REQ_VIEW_CLOSE },
654 { KEY_TAB, REQ_VIEW_NEXT },
655 { KEY_RETURN, REQ_ENTER },
656 { KEY_UP, REQ_PREVIOUS },
657 { KEY_DOWN, REQ_NEXT },
658
659 /* Cursor navigation */
660 { 'k', REQ_MOVE_UP },
661 { 'j', REQ_MOVE_DOWN },
662 { KEY_HOME, REQ_MOVE_FIRST_LINE },
663 { KEY_END, REQ_MOVE_LAST_LINE },
664 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
665 { ' ', REQ_MOVE_PAGE_DOWN },
666 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
667 { 'b', REQ_MOVE_PAGE_UP },
668 { '-', REQ_MOVE_PAGE_UP },
669
670 /* Scrolling */
671 { KEY_IC, REQ_SCROLL_LINE_UP },
672 { KEY_DC, REQ_SCROLL_LINE_DOWN },
673 { 'w', REQ_SCROLL_PAGE_UP },
674 { 's', REQ_SCROLL_PAGE_DOWN },
675
676 /* Misc */
677 { 'Q', REQ_QUIT },
678 { 'z', REQ_STOP_LOADING },
679 { 'v', REQ_SHOW_VERSION },
680 { 'r', REQ_SCREEN_REDRAW },
681 { 'n', REQ_TOGGLE_LINENO },
682 { 'g', REQ_TOGGLE_REV_GRAPH},
683 { ':', REQ_PROMPT },
684
685 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
686 { ERR, REQ_SCREEN_UPDATE },
687
688 /* Use the ncurses SIGWINCH handler. */
689 { KEY_RESIZE, REQ_SCREEN_RESIZE },
690 };
691
692 #define KEYMAP_INFO \
693 KEYMAP_(GENERIC), \
694 KEYMAP_(MAIN), \
695 KEYMAP_(DIFF), \
696 KEYMAP_(LOG), \
697 KEYMAP_(PAGER), \
698 KEYMAP_(HELP) \
699
700 enum keymap {
701 #define KEYMAP_(name) KEYMAP_##name
702 KEYMAP_INFO
703 #undef KEYMAP_
704 };
705
706 static struct int_map keymap_table[] = {
707 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
708 KEYMAP_INFO
709 #undef KEYMAP_
710 };
711
712 #define set_keymap(map, name) \
713 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
714
715 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
716
717 static void
718 add_keybinding(enum keymap keymap, enum request request, int key)
719 {
720 struct keybinding *keybinding;
721
722 keybinding = calloc(1, sizeof(*keybinding));
723 if (!keybinding)
724 die("Failed to allocate keybinding");
725
726 keybinding->alias = key;
727 keybinding->request = request;
728 keybinding->next = keybindings[keymap];
729 keybindings[keymap] = keybinding;
730 }
731
732 /* Looks for a key binding first in the given map, then in the generic map, and
733 * lastly in the default keybindings. */
734 static enum request
735 get_keybinding(enum keymap keymap, int key)
736 {
737 struct keybinding *kbd;
738 int i;
739
740 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
741 if (kbd->alias == key)
742 return kbd->request;
743
744 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
745 if (kbd->alias == key)
746 return kbd->request;
747
748 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
749 if (default_keybindings[i].alias == key)
750 return default_keybindings[i].request;
751
752 return (enum request) key;
753 }
754
755
756 struct key {
757 char *name;
758 int value;
759 };
760
761 static struct key key_table[] = {
762 { "Enter", KEY_RETURN },
763 { "Space", ' ' },
764 { "Backspace", KEY_BACKSPACE },
765 { "Tab", KEY_TAB },
766 { "Escape", KEY_ESC },
767 { "Left", KEY_LEFT },
768 { "Right", KEY_RIGHT },
769 { "Up", KEY_UP },
770 { "Down", KEY_DOWN },
771 { "Insert", KEY_IC },
772 { "Delete", KEY_DC },
773 { "Home", KEY_HOME },
774 { "End", KEY_END },
775 { "PageUp", KEY_PPAGE },
776 { "PageDown", KEY_NPAGE },
777 { "F1", KEY_F(1) },
778 { "F2", KEY_F(2) },
779 { "F3", KEY_F(3) },
780 { "F4", KEY_F(4) },
781 { "F5", KEY_F(5) },
782 { "F6", KEY_F(6) },
783 { "F7", KEY_F(7) },
784 { "F8", KEY_F(8) },
785 { "F9", KEY_F(9) },
786 { "F10", KEY_F(10) },
787 { "F11", KEY_F(11) },
788 { "F12", KEY_F(12) },
789 };
790
791 static int
792 get_key_value(const char *name)
793 {
794 int i;
795
796 for (i = 0; i < ARRAY_SIZE(key_table); i++)
797 if (!strcasecmp(key_table[i].name, name))
798 return key_table[i].value;
799
800 if (strlen(name) == 1 && isprint(*name))
801 return (int) *name;
802
803 return ERR;
804 }
805
806 static char *
807 get_key(enum request request)
808 {
809 static char buf[BUFSIZ];
810 static char key_char[] = "'X'";
811 int pos = 0;
812 char *sep = " ";
813 int i;
814
815 buf[pos] = 0;
816
817 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
818 struct keybinding *keybinding = &default_keybindings[i];
819 char *seq = NULL;
820 int key;
821
822 if (keybinding->request != request)
823 continue;
824
825 for (key = 0; key < ARRAY_SIZE(key_table); key++)
826 if (key_table[key].value == keybinding->alias)
827 seq = key_table[key].name;
828
829 if (seq == NULL &&
830 keybinding->alias < 127 &&
831 isprint(keybinding->alias)) {
832 key_char[1] = (char) keybinding->alias;
833 seq = key_char;
834 }
835
836 if (!seq)
837 seq = "'?'";
838
839 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
840 return "Too many keybindings!";
841 sep = ", ";
842 }
843
844 return buf;
845 }
846
847
848 /*
849 * User config file handling.
850 */
851
852 static struct int_map color_map[] = {
853 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
854 COLOR_MAP(DEFAULT),
855 COLOR_MAP(BLACK),
856 COLOR_MAP(BLUE),
857 COLOR_MAP(CYAN),
858 COLOR_MAP(GREEN),
859 COLOR_MAP(MAGENTA),
860 COLOR_MAP(RED),
861 COLOR_MAP(WHITE),
862 COLOR_MAP(YELLOW),
863 };
864
865 #define set_color(color, name) \
866 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
867
868 static struct int_map attr_map[] = {
869 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
870 ATTR_MAP(NORMAL),
871 ATTR_MAP(BLINK),
872 ATTR_MAP(BOLD),
873 ATTR_MAP(DIM),
874 ATTR_MAP(REVERSE),
875 ATTR_MAP(STANDOUT),
876 ATTR_MAP(UNDERLINE),
877 };
878
879 #define set_attribute(attr, name) \
880 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
881
882 static int config_lineno;
883 static bool config_errors;
884 static char *config_msg;
885
886 /* Wants: object fgcolor bgcolor [attr] */
887 static int
888 option_color_command(int argc, char *argv[])
889 {
890 struct line_info *info;
891
892 if (argc != 3 && argc != 4) {
893 config_msg = "Wrong number of arguments given to color command";
894 return ERR;
895 }
896
897 info = get_line_info(argv[0], strlen(argv[0]));
898 if (!info) {
899 config_msg = "Unknown color name";
900 return ERR;
901 }
902
903 if (set_color(&info->fg, argv[1]) == ERR ||
904 set_color(&info->bg, argv[2]) == ERR) {
905 config_msg = "Unknown color";
906 return ERR;
907 }
908
909 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
910 config_msg = "Unknown attribute";
911 return ERR;
912 }
913
914 return OK;
915 }
916
917 /* Wants: name = value */
918 static int
919 option_set_command(int argc, char *argv[])
920 {
921 if (argc != 3) {
922 config_msg = "Wrong number of arguments given to set command";
923 return ERR;
924 }
925
926 if (strcmp(argv[1], "=")) {
927 config_msg = "No value assigned";
928 return ERR;
929 }
930
931 if (!strcmp(argv[0], "show-rev-graph")) {
932 opt_rev_graph = (!strcmp(argv[2], "1") ||
933 !strcmp(argv[2], "true") ||
934 !strcmp(argv[2], "yes"));
935 return OK;
936 }
937
938 if (!strcmp(argv[0], "line-number-interval")) {
939 opt_num_interval = atoi(argv[2]);
940 return OK;
941 }
942
943 if (!strcmp(argv[0], "tab-size")) {
944 opt_tab_size = atoi(argv[2]);
945 return OK;
946 }
947
948 if (!strcmp(argv[0], "commit-encoding")) {
949 char *arg = argv[2];
950 int delimiter = *arg;
951 int i;
952
953 switch (delimiter) {
954 case '"':
955 case '\'':
956 for (arg++, i = 0; arg[i]; i++)
957 if (arg[i] == delimiter) {
958 arg[i] = 0;
959 break;
960 }
961 default:
962 string_copy(opt_encoding, arg);
963 return OK;
964 }
965 }
966
967 config_msg = "Unknown variable name";
968 return ERR;
969 }
970
971 /* Wants: mode request key */
972 static int
973 option_bind_command(int argc, char *argv[])
974 {
975 enum request request;
976 int keymap;
977 int key;
978
979 if (argc != 3) {
980 config_msg = "Wrong number of arguments given to bind command";
981 return ERR;
982 }
983
984 if (set_keymap(&keymap, argv[0]) == ERR) {
985 config_msg = "Unknown key map";
986 return ERR;
987 }
988
989 key = get_key_value(argv[1]);
990 if (key == ERR) {
991 config_msg = "Unknown key";
992 return ERR;
993 }
994
995 request = get_request(argv[2]);
996 if (request == REQ_UNKNOWN) {
997 config_msg = "Unknown request name";
998 return ERR;
999 }
1000
1001 add_keybinding(keymap, request, key);
1002
1003 return OK;
1004 }
1005
1006 static int
1007 set_option(char *opt, char *value)
1008 {
1009 char *argv[16];
1010 int valuelen;
1011 int argc = 0;
1012
1013 /* Tokenize */
1014 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1015 argv[argc++] = value;
1016
1017 value += valuelen;
1018 if (!*value)
1019 break;
1020
1021 *value++ = 0;
1022 while (isspace(*value))
1023 value++;
1024 }
1025
1026 if (!strcmp(opt, "color"))
1027 return option_color_command(argc, argv);
1028
1029 if (!strcmp(opt, "set"))
1030 return option_set_command(argc, argv);
1031
1032 if (!strcmp(opt, "bind"))
1033 return option_bind_command(argc, argv);
1034
1035 config_msg = "Unknown option command";
1036 return ERR;
1037 }
1038
1039 static int
1040 read_option(char *opt, int optlen, char *value, int valuelen)
1041 {
1042 int status = OK;
1043
1044 config_lineno++;
1045 config_msg = "Internal error";
1046
1047 /* Check for comment markers, since read_properties() will
1048 * only ensure opt and value are split at first " \t". */
1049 optlen = strcspn(opt, "#;");
1050 if (optlen == 0)
1051 return OK;
1052
1053 if (opt[optlen] != 0) {
1054 config_msg = "No option value";
1055 status = ERR;
1056
1057 } else {
1058 /* Look for comment endings in the value. */
1059 int len = strcspn(value, "#;");
1060
1061 if (len < valuelen) {
1062 valuelen = len;
1063 value[valuelen] = 0;
1064 }
1065
1066 status = set_option(opt, value);
1067 }
1068
1069 if (status == ERR) {
1070 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1071 config_lineno, optlen, opt, config_msg);
1072 config_errors = TRUE;
1073 }
1074
1075 /* Always keep going if errors are encountered. */
1076 return OK;
1077 }
1078
1079 static int
1080 load_options(void)
1081 {
1082 char *home = getenv("HOME");
1083 char buf[1024];
1084 FILE *file;
1085
1086 config_lineno = 0;
1087 config_errors = FALSE;
1088
1089 if (!home || !string_format(buf, "%s/.tigrc", home))
1090 return ERR;
1091
1092 /* It's ok that the file doesn't exist. */
1093 file = fopen(buf, "r");
1094 if (!file)
1095 return OK;
1096
1097 if (read_properties(file, " \t", read_option) == ERR ||
1098 config_errors == TRUE)
1099 fprintf(stderr, "Errors while loading %s.\n", buf);
1100
1101 return OK;
1102 }
1103
1104
1105 /*
1106 * The viewer
1107 */
1108
1109 struct view;
1110 struct view_ops;
1111
1112 /* The display array of active views and the index of the current view. */
1113 static struct view *display[2];
1114 static unsigned int current_view;
1115
1116 #define foreach_view(view, i) \
1117 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1118
1119 #define displayed_views() (display[1] != NULL ? 2 : 1)
1120
1121 /* Current head and commit ID */
1122 static char ref_commit[SIZEOF_REF] = "HEAD";
1123 static char ref_head[SIZEOF_REF] = "HEAD";
1124
1125 struct view {
1126 const char *name; /* View name */
1127 const char *cmd_fmt; /* Default command line format */
1128 const char *cmd_env; /* Command line set via environment */
1129 const char *id; /* Points to either of ref_{head,commit} */
1130
1131 struct view_ops *ops; /* View operations */
1132
1133 enum keymap keymap; /* What keymap does this view have */
1134
1135 char cmd[SIZEOF_CMD]; /* Command buffer */
1136 char ref[SIZEOF_REF]; /* Hovered commit reference */
1137 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1138
1139 int height, width; /* The width and height of the main window */
1140 WINDOW *win; /* The main window */
1141 WINDOW *title; /* The title window living below the main window */
1142
1143 /* Navigation */
1144 unsigned long offset; /* Offset of the window top */
1145 unsigned long lineno; /* Current line number */
1146
1147 /* If non-NULL, points to the view that opened this view. If this view
1148 * is closed tig will switch back to the parent view. */
1149 struct view *parent;
1150
1151 /* Buffering */
1152 unsigned long lines; /* Total number of lines */
1153 struct line *line; /* Line index */
1154 unsigned long line_size;/* Total number of allocated lines */
1155 unsigned int digits; /* Number of digits in the lines member. */
1156
1157 /* Loading */
1158 FILE *pipe;
1159 time_t start_time;
1160 };
1161
1162 struct view_ops {
1163 /* What type of content being displayed. Used in the title bar. */
1164 const char *type;
1165 /* Draw one line; @lineno must be < view->height. */
1166 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1167 /* Read one line; updates view->line. */
1168 bool (*read)(struct view *view, char *data);
1169 /* Depending on view, change display based on current line. */
1170 bool (*enter)(struct view *view, struct line *line);
1171 };
1172
1173 static struct view_ops pager_ops;
1174 static struct view_ops main_ops;
1175
1176 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1177 { name, cmd, #env, ref, ops, map}
1178
1179 #define VIEW_(id, name, ops, ref) \
1180 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1181
1182
1183 static struct view views[] = {
1184 VIEW_(MAIN, "main", &main_ops, ref_head),
1185 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1186 VIEW_(LOG, "log", &pager_ops, ref_head),
1187 VIEW_(HELP, "help", &pager_ops, "static"),
1188 VIEW_(PAGER, "pager", &pager_ops, "static"),
1189 };
1190
1191 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1192
1193
1194 static bool
1195 draw_view_line(struct view *view, unsigned int lineno)
1196 {
1197 if (view->offset + lineno >= view->lines)
1198 return FALSE;
1199
1200 return view->ops->draw(view, &view->line[view->offset + lineno], lineno);
1201 }
1202
1203 static void
1204 redraw_view_from(struct view *view, int lineno)
1205 {
1206 assert(0 <= lineno && lineno < view->height);
1207
1208 for (; lineno < view->height; lineno++) {
1209 if (!draw_view_line(view, lineno))
1210 break;
1211 }
1212
1213 redrawwin(view->win);
1214 wrefresh(view->win);
1215 }
1216
1217 static void
1218 redraw_view(struct view *view)
1219 {
1220 wclear(view->win);
1221 redraw_view_from(view, 0);
1222 }
1223
1224
1225 static void
1226 update_view_title(struct view *view)
1227 {
1228 if (view == display[current_view])
1229 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1230 else
1231 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1232
1233 werase(view->title);
1234 wmove(view->title, 0, 0);
1235
1236 if (*view->ref)
1237 wprintw(view->title, "[%s] %s", view->name, view->ref);
1238 else
1239 wprintw(view->title, "[%s]", view->name);
1240
1241 if (view->lines || view->pipe) {
1242 unsigned int view_lines = view->offset + view->height;
1243 unsigned int lines = view->lines
1244 ? MIN(view_lines, view->lines) * 100 / view->lines
1245 : 0;
1246
1247 wprintw(view->title, " - %s %d of %d (%d%%)",
1248 view->ops->type,
1249 view->lineno + 1,
1250 view->lines,
1251 lines);
1252 }
1253
1254 if (view->pipe) {
1255 time_t secs = time(NULL) - view->start_time;
1256
1257 /* Three git seconds are a long time ... */
1258 if (secs > 2)
1259 wprintw(view->title, " %lds", secs);
1260 }
1261
1262 wmove(view->title, 0, view->width - 1);
1263 wrefresh(view->title);
1264 }
1265
1266 static void
1267 resize_display(void)
1268 {
1269 int offset, i;
1270 struct view *base = display[0];
1271 struct view *view = display[1] ? display[1] : display[0];
1272
1273 /* Setup window dimensions */
1274
1275 getmaxyx(stdscr, base->height, base->width);
1276
1277 /* Make room for the status window. */
1278 base->height -= 1;
1279
1280 if (view != base) {
1281 /* Horizontal split. */
1282 view->width = base->width;
1283 view->height = SCALE_SPLIT_VIEW(base->height);
1284 base->height -= view->height;
1285
1286 /* Make room for the title bar. */
1287 view->height -= 1;
1288 }
1289
1290 /* Make room for the title bar. */
1291 base->height -= 1;
1292
1293 offset = 0;
1294
1295 foreach_view (view, i) {
1296 if (!view->win) {
1297 view->win = newwin(view->height, 0, offset, 0);
1298 if (!view->win)
1299 die("Failed to create %s view", view->name);
1300
1301 scrollok(view->win, TRUE);
1302
1303 view->title = newwin(1, 0, offset + view->height, 0);
1304 if (!view->title)
1305 die("Failed to create title window");
1306
1307 } else {
1308 wresize(view->win, view->height, view->width);
1309 mvwin(view->win, offset, 0);
1310 mvwin(view->title, offset + view->height, 0);
1311 }
1312
1313 offset += view->height + 1;
1314 }
1315 }
1316
1317 static void
1318 redraw_display(void)
1319 {
1320 struct view *view;
1321 int i;
1322
1323 foreach_view (view, i) {
1324 redraw_view(view);
1325 update_view_title(view);
1326 }
1327 }
1328
1329 static void
1330 update_display_cursor(void)
1331 {
1332 struct view *view = display[current_view];
1333
1334 /* Move the cursor to the right-most column of the cursor line.
1335 *
1336 * XXX: This could turn out to be a bit expensive, but it ensures that
1337 * the cursor does not jump around. */
1338 if (view->lines) {
1339 wmove(view->win, view->lineno - view->offset, view->width - 1);
1340 wrefresh(view->win);
1341 }
1342 }
1343
1344 /*
1345 * Navigation
1346 */
1347
1348 /* Scrolling backend */
1349 static void
1350 do_scroll_view(struct view *view, int lines, bool redraw)
1351 {
1352 /* The rendering expects the new offset. */
1353 view->offset += lines;
1354
1355 assert(0 <= view->offset && view->offset < view->lines);
1356 assert(lines);
1357
1358 /* Redraw the whole screen if scrolling is pointless. */
1359 if (view->height < ABS(lines)) {
1360 redraw_view(view);
1361
1362 } else {
1363 int line = lines > 0 ? view->height - lines : 0;
1364 int end = line + ABS(lines);
1365
1366 wscrl(view->win, lines);
1367
1368 for (; line < end; line++) {
1369 if (!draw_view_line(view, line))
1370 break;
1371 }
1372 }
1373
1374 /* Move current line into the view. */
1375 if (view->lineno < view->offset) {
1376 view->lineno = view->offset;
1377 draw_view_line(view, 0);
1378
1379 } else if (view->lineno >= view->offset + view->height) {
1380 if (view->lineno == view->offset + view->height) {
1381 /* Clear the hidden line so it doesn't show if the view
1382 * is scrolled up. */
1383 wmove(view->win, view->height, 0);
1384 wclrtoeol(view->win);
1385 }
1386 view->lineno = view->offset + view->height - 1;
1387 draw_view_line(view, view->lineno - view->offset);
1388 }
1389
1390 assert(view->offset <= view->lineno && view->lineno < view->lines);
1391
1392 if (!redraw)
1393 return;
1394
1395 redrawwin(view->win);
1396 wrefresh(view->win);
1397 report("");
1398 }
1399
1400 /* Scroll frontend */
1401 static void
1402 scroll_view(struct view *view, enum request request)
1403 {
1404 int lines = 1;
1405
1406 switch (request) {
1407 case REQ_SCROLL_PAGE_DOWN:
1408 lines = view->height;
1409 case REQ_SCROLL_LINE_DOWN:
1410 if (view->offset + lines > view->lines)
1411 lines = view->lines - view->offset;
1412
1413 if (lines == 0 || view->offset + view->height >= view->lines) {
1414 report("Cannot scroll beyond the last line");
1415 return;
1416 }
1417 break;
1418
1419 case REQ_SCROLL_PAGE_UP:
1420 lines = view->height;
1421 case REQ_SCROLL_LINE_UP:
1422 if (lines > view->offset)
1423 lines = view->offset;
1424
1425 if (lines == 0) {
1426 report("Cannot scroll beyond the first line");
1427 return;
1428 }
1429
1430 lines = -lines;
1431 break;
1432
1433 default:
1434 die("request %d not handled in switch", request);
1435 }
1436
1437 do_scroll_view(view, lines, TRUE);
1438 }
1439
1440 /* Cursor moving */
1441 static void
1442 move_view(struct view *view, enum request request, bool redraw)
1443 {
1444 int steps;
1445
1446 switch (request) {
1447 case REQ_MOVE_FIRST_LINE:
1448 steps = -view->lineno;
1449 break;
1450
1451 case REQ_MOVE_LAST_LINE:
1452 steps = view->lines - view->lineno - 1;
1453 break;
1454
1455 case REQ_MOVE_PAGE_UP:
1456 steps = view->height > view->lineno
1457 ? -view->lineno : -view->height;
1458 break;
1459
1460 case REQ_MOVE_PAGE_DOWN:
1461 steps = view->lineno + view->height >= view->lines
1462 ? view->lines - view->lineno - 1 : view->height;
1463 break;
1464
1465 case REQ_MOVE_UP:
1466 steps = -1;
1467 break;
1468
1469 case REQ_MOVE_DOWN:
1470 steps = 1;
1471 break;
1472
1473 default:
1474 die("request %d not handled in switch", request);
1475 }
1476
1477 if (steps <= 0 && view->lineno == 0) {
1478 report("Cannot move beyond the first line");
1479 return;
1480
1481 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1482 report("Cannot move beyond the last line");
1483 return;
1484 }
1485
1486 /* Move the current line */
1487 view->lineno += steps;
1488 assert(0 <= view->lineno && view->lineno < view->lines);
1489
1490 /* Repaint the old "current" line if we be scrolling */
1491 if (ABS(steps) < view->height) {
1492 int prev_lineno = view->lineno - steps - view->offset;
1493
1494 wmove(view->win, prev_lineno, 0);
1495 wclrtoeol(view->win);
1496 draw_view_line(view, prev_lineno);
1497 }
1498
1499 /* Check whether the view needs to be scrolled */
1500 if (view->lineno < view->offset ||
1501 view->lineno >= view->offset + view->height) {
1502 if (steps < 0 && -steps > view->offset) {
1503 steps = -view->offset;
1504
1505 } else if (steps > 0) {
1506 if (view->lineno == view->lines - 1 &&
1507 view->lines > view->height) {
1508 steps = view->lines - view->offset - 1;
1509 if (steps >= view->height)
1510 steps -= view->height - 1;
1511 }
1512 }
1513
1514 do_scroll_view(view, steps, redraw);
1515 return;
1516 }
1517
1518 /* Draw the current line */
1519 draw_view_line(view, view->lineno - view->offset);
1520
1521 if (!redraw)
1522 return;
1523
1524 redrawwin(view->win);
1525 wrefresh(view->win);
1526 report("");
1527 }
1528
1529
1530 /*
1531 * Incremental updating
1532 */
1533
1534 static void
1535 end_update(struct view *view)
1536 {
1537 if (!view->pipe)
1538 return;
1539 set_nonblocking_input(FALSE);
1540 if (view->pipe == stdin)
1541 fclose(view->pipe);
1542 else
1543 pclose(view->pipe);
1544 view->pipe = NULL;
1545 }
1546
1547 static bool
1548 begin_update(struct view *view)
1549 {
1550 const char *id = view->id;
1551
1552 if (view->pipe)
1553 end_update(view);
1554
1555 if (opt_cmd[0]) {
1556 string_copy(view->cmd, opt_cmd);
1557 opt_cmd[0] = 0;
1558 /* When running random commands, the view ref could have become
1559 * invalid so clear it. */
1560 view->ref[0] = 0;
1561 } else {
1562 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1563
1564 if (!string_format(view->cmd, format, id, id, id, id, id))
1565 return FALSE;
1566 }
1567
1568 /* Special case for the pager view. */
1569 if (opt_pipe) {
1570 view->pipe = opt_pipe;
1571 opt_pipe = NULL;
1572 } else {
1573 view->pipe = popen(view->cmd, "r");
1574 }
1575
1576 if (!view->pipe)
1577 return FALSE;
1578
1579 set_nonblocking_input(TRUE);
1580
1581 view->offset = 0;
1582 view->lines = 0;
1583 view->lineno = 0;
1584 string_copy(view->vid, id);
1585
1586 if (view->line) {
1587 int i;
1588
1589 for (i = 0; i < view->lines; i++)
1590 if (view->line[i].data)
1591 free(view->line[i].data);
1592
1593 free(view->line);
1594 view->line = NULL;
1595 }
1596
1597 view->start_time = time(NULL);
1598
1599 return TRUE;
1600 }
1601
1602 static struct line *
1603 realloc_lines(struct view *view, size_t line_size)
1604 {
1605 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1606
1607 if (!tmp)
1608 return NULL;
1609
1610 view->line = tmp;
1611 view->line_size = line_size;
1612 return view->line;
1613 }
1614
1615 static bool
1616 update_view(struct view *view)
1617 {
1618 char buffer[BUFSIZ];
1619 char *line;
1620 /* The number of lines to read. If too low it will cause too much
1621 * redrawing (and possible flickering), if too high responsiveness
1622 * will suffer. */
1623 unsigned long lines = view->height;
1624 int redraw_from = -1;
1625
1626 if (!view->pipe)
1627 return TRUE;
1628
1629 /* Only redraw if lines are visible. */
1630 if (view->offset + view->height >= view->lines)
1631 redraw_from = view->lines - view->offset;
1632
1633 if (!realloc_lines(view, view->lines + lines))
1634 goto alloc_error;
1635
1636 while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
1637 int linelen = strlen(line);
1638
1639 if (linelen)
1640 line[linelen - 1] = 0;
1641
1642 if (!view->ops->read(view, line))
1643 goto alloc_error;
1644
1645 if (lines-- == 1)
1646 break;
1647 }
1648
1649 {
1650 int digits;
1651
1652 lines = view->lines;
1653 for (digits = 0; lines; digits++)
1654 lines /= 10;
1655
1656 /* Keep the displayed view in sync with line number scaling. */
1657 if (digits != view->digits) {
1658 view->digits = digits;
1659 redraw_from = 0;
1660 }
1661 }
1662
1663 if (redraw_from >= 0) {
1664 /* If this is an incremental update, redraw the previous line
1665 * since for commits some members could have changed when
1666 * loading the main view. */
1667 if (redraw_from > 0)
1668 redraw_from--;
1669
1670 /* Incrementally draw avoids flickering. */
1671 redraw_view_from(view, redraw_from);
1672 }
1673
1674 /* Update the title _after_ the redraw so that if the redraw picks up a
1675 * commit reference in view->ref it'll be available here. */
1676 update_view_title(view);
1677
1678 if (ferror(view->pipe)) {
1679 report("Failed to read: %s", strerror(errno));
1680 goto end;
1681
1682 } else if (feof(view->pipe)) {
1683 report("");
1684 goto end;
1685 }
1686
1687 return TRUE;
1688
1689 alloc_error:
1690 report("Allocation failure");
1691
1692 end:
1693 end_update(view);
1694 return FALSE;
1695 }
1696
1697
1698 /*
1699 * View opening
1700 */
1701
1702 static void open_help_view(struct view *view)
1703 {
1704 char buf[BUFSIZ];
1705 int lines = ARRAY_SIZE(req_info) + 2;
1706 int i;
1707
1708 if (view->lines > 0)
1709 return;
1710
1711 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1712 if (!req_info[i].request)
1713 lines++;
1714
1715 view->line = calloc(lines, sizeof(*view->line));
1716 if (!view->line) {
1717 report("Allocation failure");
1718 return;
1719 }
1720
1721 view->ops->read(view, "Quick reference for tig keybindings:");
1722
1723 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1724 char *key;
1725
1726 if (!req_info[i].request) {
1727 view->ops->read(view, "");
1728 view->ops->read(view, req_info[i].help);
1729 continue;
1730 }
1731
1732 key = get_key(req_info[i].request);
1733 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1734 continue;
1735
1736 view->ops->read(view, buf);
1737 }
1738 }
1739
1740 enum open_flags {
1741 OPEN_DEFAULT = 0, /* Use default view switching. */
1742 OPEN_SPLIT = 1, /* Split current view. */
1743 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1744 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1745 };
1746
1747 static void
1748 open_view(struct view *prev, enum request request, enum open_flags flags)
1749 {
1750 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1751 bool split = !!(flags & OPEN_SPLIT);
1752 bool reload = !!(flags & OPEN_RELOAD);
1753 struct view *view = VIEW(request);
1754 int nviews = displayed_views();
1755 struct view *base_view = display[0];
1756
1757 if (view == prev && nviews == 1 && !reload) {
1758 report("Already in %s view", view->name);
1759 return;
1760 }
1761
1762 if (view == VIEW(REQ_VIEW_HELP)) {
1763 open_help_view(view);
1764
1765 } else if ((reload || strcmp(view->vid, view->id)) &&
1766 !begin_update(view)) {
1767 report("Failed to load %s view", view->name);
1768 return;
1769 }
1770
1771 if (split) {
1772 display[1] = view;
1773 if (!backgrounded)
1774 current_view = 1;
1775 } else {
1776 /* Maximize the current view. */
1777 memset(display, 0, sizeof(display));
1778 current_view = 0;
1779 display[current_view] = view;
1780 }
1781
1782 /* Resize the view when switching between split- and full-screen,
1783 * or when switching between two different full-screen views. */
1784 if (nviews != displayed_views() ||
1785 (nviews == 1 && base_view != display[0]))
1786 resize_display();
1787
1788 if (split && prev->lineno - prev->offset >= prev->height) {
1789 /* Take the title line into account. */
1790 int lines = prev->lineno - prev->offset - prev->height + 1;
1791
1792 /* Scroll the view that was split if the current line is
1793 * outside the new limited view. */
1794 do_scroll_view(prev, lines, TRUE);
1795 }
1796
1797 if (prev && view != prev) {
1798 if (split && !backgrounded) {
1799 /* "Blur" the previous view. */
1800 update_view_title(prev);
1801 }
1802
1803 view->parent = prev;
1804 }
1805
1806 if (view->pipe && view->lines == 0) {
1807 /* Clear the old view and let the incremental updating refill
1808 * the screen. */
1809 wclear(view->win);
1810 report("");
1811 } else {
1812 redraw_view(view);
1813 report("");
1814 }
1815
1816 /* If the view is backgrounded the above calls to report()
1817 * won't redraw the view title. */
1818 if (backgrounded)
1819 update_view_title(view);
1820 }
1821
1822
1823 /*
1824 * User request switch noodle
1825 */
1826
1827 static int
1828 view_driver(struct view *view, enum request request)
1829 {
1830 int i;
1831
1832 switch (request) {
1833 case REQ_MOVE_UP:
1834 case REQ_MOVE_DOWN:
1835 case REQ_MOVE_PAGE_UP:
1836 case REQ_MOVE_PAGE_DOWN:
1837 case REQ_MOVE_FIRST_LINE:
1838 case REQ_MOVE_LAST_LINE:
1839 move_view(view, request, TRUE);
1840 break;
1841
1842 case REQ_SCROLL_LINE_DOWN:
1843 case REQ_SCROLL_LINE_UP:
1844 case REQ_SCROLL_PAGE_DOWN:
1845 case REQ_SCROLL_PAGE_UP:
1846 scroll_view(view, request);
1847 break;
1848
1849 case REQ_VIEW_MAIN:
1850 case REQ_VIEW_DIFF:
1851 case REQ_VIEW_LOG:
1852 case REQ_VIEW_HELP:
1853 case REQ_VIEW_PAGER:
1854 open_view(view, request, OPEN_DEFAULT);
1855 break;
1856
1857 case REQ_NEXT:
1858 case REQ_PREVIOUS:
1859 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
1860
1861 if (view == VIEW(REQ_VIEW_DIFF) &&
1862 view->parent == VIEW(REQ_VIEW_MAIN)) {
1863 bool redraw = display[1] == view;
1864
1865 view = view->parent;
1866 move_view(view, request, redraw);
1867 if (redraw)
1868 update_view_title(view);
1869 } else {
1870 move_view(view, request, TRUE);
1871 break;
1872 }
1873 /* Fall-through */
1874
1875 case REQ_ENTER:
1876 if (!view->lines) {
1877 report("Nothing to enter");
1878 break;
1879 }
1880 return view->ops->enter(view, &view->line[view->lineno]);
1881
1882 case REQ_VIEW_NEXT:
1883 {
1884 int nviews = displayed_views();
1885 int next_view = (current_view + 1) % nviews;
1886
1887 if (next_view == current_view) {
1888 report("Only one view is displayed");
1889 break;
1890 }
1891
1892 current_view = next_view;
1893 /* Blur out the title of the previous view. */
1894 update_view_title(view);
1895 report("");
1896 break;
1897 }
1898 case REQ_TOGGLE_LINENO:
1899 opt_line_number = !opt_line_number;
1900 redraw_display();
1901 break;
1902
1903 case REQ_TOGGLE_REV_GRAPH:
1904 opt_rev_graph = !opt_rev_graph;
1905 redraw_display();
1906 break;
1907
1908 case REQ_PROMPT:
1909 /* Always reload^Wrerun commands from the prompt. */
1910 open_view(view, opt_request, OPEN_RELOAD);
1911 break;
1912
1913 case REQ_STOP_LOADING:
1914 for (i = 0; i < ARRAY_SIZE(views); i++) {
1915 view = &views[i];
1916 if (view->pipe)
1917 report("Stopped loading the %s view", view->name),
1918 end_update(view);
1919 }
1920 break;
1921
1922 case REQ_SHOW_VERSION:
1923 report("%s (built %s)", VERSION, __DATE__);
1924 return TRUE;
1925
1926 case REQ_SCREEN_RESIZE:
1927 resize_display();
1928 /* Fall-through */
1929 case REQ_SCREEN_REDRAW:
1930 redraw_display();
1931 break;
1932
1933 case REQ_SCREEN_UPDATE:
1934 doupdate();
1935 return TRUE;
1936
1937 case REQ_VIEW_CLOSE:
1938 /* XXX: Mark closed views by letting view->parent point to the
1939 * view itself. Parents to closed view should never be
1940 * followed. */
1941 if (view->parent &&
1942 view->parent->parent != view->parent) {
1943 memset(display, 0, sizeof(display));
1944 current_view = 0;
1945 display[current_view] = view->parent;
1946 view->parent = view;
1947 resize_display();
1948 redraw_display();
1949 break;
1950 }
1951 /* Fall-through */
1952 case REQ_QUIT:
1953 return FALSE;
1954
1955 default:
1956 /* An unknown key will show most commonly used commands. */
1957 report("Unknown key, press 'h' for help");
1958 return TRUE;
1959 }
1960
1961 return TRUE;
1962 }
1963
1964
1965 /*
1966 * Pager backend
1967 */
1968
1969 static bool
1970 pager_draw(struct view *view, struct line *line, unsigned int lineno)
1971 {
1972 char *text = line->data;
1973 enum line_type type = line->type;
1974 int textlen = strlen(text);
1975 int attr;
1976
1977 wmove(view->win, lineno, 0);
1978
1979 if (view->offset + lineno == view->lineno) {
1980 if (type == LINE_COMMIT) {
1981 string_copy(view->ref, text + 7);
1982 string_copy(ref_commit, view->ref);
1983 }
1984
1985 type = LINE_CURSOR;
1986 wchgat(view->win, -1, 0, type, NULL);
1987 }
1988
1989 attr = get_line_attr(type);
1990 wattrset(view->win, attr);
1991
1992 if (opt_line_number || opt_tab_size < TABSIZE) {
1993 static char spaces[] = " ";
1994 int col_offset = 0, col = 0;
1995
1996 if (opt_line_number) {
1997 unsigned long real_lineno = view->offset + lineno + 1;
1998
1999 if (real_lineno == 1 ||
2000 (real_lineno % opt_num_interval) == 0) {
2001 wprintw(view->win, "%.*d", view->digits, real_lineno);
2002
2003 } else {
2004 waddnstr(view->win, spaces,
2005 MIN(view->digits, STRING_SIZE(spaces)));
2006 }
2007 waddstr(view->win, ": ");
2008 col_offset = view->digits + 2;
2009 }
2010
2011 while (text && col_offset + col < view->width) {
2012 int cols_max = view->width - col_offset - col;
2013 char *pos = text;
2014 int cols;
2015
2016 if (*text == '\t') {
2017 text++;
2018 assert(sizeof(spaces) > TABSIZE);
2019 pos = spaces;
2020 cols = opt_tab_size - (col % opt_tab_size);
2021
2022 } else {
2023 text = strchr(text, '\t');
2024 cols = line ? text - pos : strlen(pos);
2025 }
2026
2027 waddnstr(view->win, pos, MIN(cols, cols_max));
2028 col += cols;
2029 }
2030
2031 } else {
2032 int col = 0, pos = 0;
2033
2034 for (; pos < textlen && col < view->width; pos++, col++)
2035 if (text[pos] == '\t')
2036 col += TABSIZE - (col % TABSIZE) - 1;
2037
2038 waddnstr(view->win, text, pos);
2039 }
2040
2041 return TRUE;
2042 }
2043
2044 static void
2045 add_pager_refs(struct view *view, struct line *line)
2046 {
2047 char buf[1024];
2048 char *data = line->data;
2049 struct ref **refs;
2050 int bufpos = 0, refpos = 0;
2051 const char *sep = "Refs: ";
2052
2053 assert(line->type == LINE_COMMIT);
2054
2055 refs = get_refs(data + STRING_SIZE("commit "));
2056 if (!refs)
2057 return;
2058
2059 do {
2060 struct ref *ref = refs[refpos];
2061 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2062
2063 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2064 return;
2065 sep = ", ";
2066 } while (refs[refpos++]->next);
2067
2068 if (!realloc_lines(view, view->line_size + 1))
2069 return;
2070
2071 line = &view->line[view->lines];
2072 line->data = strdup(buf);
2073 if (!line->data)
2074 return;
2075
2076 line->type = LINE_PP_REFS;
2077 view->lines++;
2078 }
2079
2080 static bool
2081 pager_read(struct view *view, char *data)
2082 {
2083 struct line *line = &view->line[view->lines];
2084
2085 line->data = strdup(data);
2086 if (!line->data)
2087 return FALSE;
2088
2089 line->type = get_line_type(line->data);
2090 view->lines++;
2091
2092 if (line->type == LINE_COMMIT &&
2093 (view == VIEW(REQ_VIEW_DIFF) ||
2094 view == VIEW(REQ_VIEW_LOG)))
2095 add_pager_refs(view, line);
2096
2097 return TRUE;
2098 }
2099
2100 static bool
2101 pager_enter(struct view *view, struct line *line)
2102 {
2103 int split = 0;
2104
2105 if (line->type == LINE_COMMIT &&
2106 (view == VIEW(REQ_VIEW_LOG) ||
2107 view == VIEW(REQ_VIEW_PAGER))) {
2108 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2109 split = 1;
2110 }
2111
2112 /* Always scroll the view even if it was split. That way
2113 * you can use Enter to scroll through the log view and
2114 * split open each commit diff. */
2115 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2116
2117 /* FIXME: A minor workaround. Scrolling the view will call report("")
2118 * but if we are scrolling a non-current view this won't properly
2119 * update the view title. */
2120 if (split)
2121 update_view_title(view);
2122
2123 return TRUE;
2124 }
2125
2126 static struct view_ops pager_ops = {
2127 "line",
2128 pager_draw,
2129 pager_read,
2130 pager_enter,
2131 };
2132
2133
2134 /*
2135 * Main view backend
2136 */
2137
2138 struct commit {
2139 char id[41]; /* SHA1 ID. */
2140 char title[75]; /* First line of the commit message. */
2141 char author[75]; /* Author of the commit. */
2142 struct tm time; /* Date from the author ident. */
2143 struct ref **refs; /* Repository references. */
2144 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2145 size_t graph_size; /* The width of the graph array. */
2146 };
2147
2148 static bool
2149 main_draw(struct view *view, struct line *line, unsigned int lineno)
2150 {
2151 char buf[DATE_COLS + 1];
2152 struct commit *commit = line->data;
2153 enum line_type type;
2154 int col = 0;
2155 size_t timelen;
2156 size_t authorlen;
2157 int trimmed = 1;
2158
2159 if (!*commit->author)
2160 return FALSE;
2161
2162 wmove(view->win, lineno, col);
2163
2164 if (view->offset + lineno == view->lineno) {
2165 string_copy(view->ref, commit->id);
2166 string_copy(ref_commit, view->ref);
2167 type = LINE_CURSOR;
2168 wattrset(view->win, get_line_attr(type));
2169 wchgat(view->win, -1, 0, type, NULL);
2170
2171 } else {
2172 type = LINE_MAIN_COMMIT;
2173 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2174 }
2175
2176 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2177 waddnstr(view->win, buf, timelen);
2178 waddstr(view->win, " ");
2179
2180 col += DATE_COLS;
2181 wmove(view->win, lineno, col);
2182 if (type != LINE_CURSOR)
2183 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2184
2185 if (opt_utf8) {
2186 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2187 } else {
2188 authorlen = strlen(commit->author);
2189 if (authorlen > AUTHOR_COLS - 2) {
2190 authorlen = AUTHOR_COLS - 2;
2191 trimmed = 1;
2192 }
2193 }
2194
2195 if (trimmed) {
2196 waddnstr(view->win, commit->author, authorlen);
2197 if (type != LINE_CURSOR)
2198 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2199 waddch(view->win, '~');
2200 } else {
2201 waddstr(view->win, commit->author);
2202 }
2203
2204 col += AUTHOR_COLS;
2205 if (type != LINE_CURSOR)
2206 wattrset(view->win, A_NORMAL);
2207
2208 if (opt_rev_graph && commit->graph_size) {
2209 size_t i;
2210
2211 wmove(view->win, lineno, col);
2212 /* Using waddch() instead of waddnstr() ensures that
2213 * they'll be rendered correctly for the cursor line. */
2214 for (i = 0; i < commit->graph_size; i++)
2215 waddch(view->win, commit->graph[i]);
2216
2217 col += commit->graph_size + 1;
2218 }
2219
2220 wmove(view->win, lineno, col);
2221
2222 if (commit->refs) {
2223 size_t i = 0;
2224
2225 do {
2226 if (type == LINE_CURSOR)
2227 ;
2228 else if (commit->refs[i]->tag)
2229 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2230 else
2231 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2232 waddstr(view->win, "[");
2233 waddstr(view->win, commit->refs[i]->name);
2234 waddstr(view->win, "]");
2235 if (type != LINE_CURSOR)
2236 wattrset(view->win, A_NORMAL);
2237 waddstr(view->win, " ");
2238 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2239 } while (commit->refs[i++]->next);
2240 }
2241
2242 if (type != LINE_CURSOR)
2243 wattrset(view->win, get_line_attr(type));
2244
2245 {
2246 int titlelen = strlen(commit->title);
2247
2248 if (col + titlelen > view->width)
2249 titlelen = view->width - col;
2250
2251 waddnstr(view->win, commit->title, titlelen);
2252 }
2253
2254 return TRUE;
2255 }
2256
2257 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2258 static bool
2259 main_read(struct view *view, char *line)
2260 {
2261 enum line_type type = get_line_type(line);
2262 struct commit *commit = view->lines
2263 ? view->line[view->lines - 1].data : NULL;
2264
2265 switch (type) {
2266 case LINE_COMMIT:
2267 commit = calloc(1, sizeof(struct commit));
2268 if (!commit)
2269 return FALSE;
2270
2271 line += STRING_SIZE("commit ");
2272
2273 view->line[view->lines++].data = commit;
2274 string_copy(commit->id, line);
2275 commit->refs = get_refs(commit->id);
2276 commit->graph[commit->graph_size++] = ACS_LTEE;
2277 break;
2278
2279 case LINE_AUTHOR:
2280 {
2281 char *ident = line + STRING_SIZE("author ");
2282 char *end = strchr(ident, '<');
2283
2284 if (!commit)
2285 break;
2286
2287 if (end) {
2288 for (; end > ident && isspace(end[-1]); end--) ;
2289 *end = 0;
2290 }
2291
2292 string_copy(commit->author, ident);
2293
2294 /* Parse epoch and timezone */
2295 if (end) {
2296 char *secs = strchr(end + 1, '>');
2297 char *zone;
2298 time_t time;
2299
2300 if (!secs || secs[1] != ' ')
2301 break;
2302
2303 secs += 2;
2304 time = (time_t) atol(secs);
2305 zone = strchr(secs, ' ');
2306 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2307 long tz;
2308
2309 zone++;
2310 tz = ('0' - zone[1]) * 60 * 60 * 10;
2311 tz += ('0' - zone[2]) * 60 * 60;
2312 tz += ('0' - zone[3]) * 60;
2313 tz += ('0' - zone[4]) * 60;
2314
2315 if (zone[0] == '-')
2316 tz = -tz;
2317
2318 time -= tz;
2319 }
2320 gmtime_r(&time, &commit->time);
2321 }
2322 break;
2323 }
2324 default:
2325 if (!commit)
2326 break;
2327
2328 /* Fill in the commit title if it has not already been set. */
2329 if (commit->title[0])
2330 break;
2331
2332 /* Require titles to start with a non-space character at the
2333 * offset used by git log. */
2334 /* FIXME: More gracefull handling of titles; append "..." to
2335 * shortened titles, etc. */
2336 if (strncmp(line, " ", 4) ||
2337 isspace(line[4]))
2338 break;
2339
2340 string_copy(commit->title, line + 4);
2341 }
2342
2343 return TRUE;
2344 }
2345
2346 static bool
2347 main_enter(struct view *view, struct line *line)
2348 {
2349 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2350
2351 open_view(view, REQ_VIEW_DIFF, flags);
2352 return TRUE;
2353 }
2354
2355 static struct view_ops main_ops = {
2356 "commit",
2357 main_draw,
2358 main_read,
2359 main_enter,
2360 };
2361
2362
2363 /*
2364 * Unicode / UTF-8 handling
2365 *
2366 * NOTE: Much of the following code for dealing with unicode is derived from
2367 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2368 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2369 */
2370
2371 /* I've (over)annotated a lot of code snippets because I am not entirely
2372 * confident that the approach taken by this small UTF-8 interface is correct.
2373 * --jonas */
2374
2375 static inline int
2376 unicode_width(unsigned long c)
2377 {
2378 if (c >= 0x1100 &&
2379 (c <= 0x115f /* Hangul Jamo */
2380 || c == 0x2329
2381 || c == 0x232a
2382 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2383 /* CJK ... Yi */
2384 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2385 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2386 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2387 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2388 || (c >= 0xffe0 && c <= 0xffe6)
2389 || (c >= 0x20000 && c <= 0x2fffd)
2390 || (c >= 0x30000 && c <= 0x3fffd)))
2391 return 2;
2392
2393 return 1;
2394 }
2395
2396 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2397 * Illegal bytes are set one. */
2398 static const unsigned char utf8_bytes[256] = {
2399 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,
2400 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,
2401 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,
2402 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,
2403 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,
2404 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,
2405 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,
2406 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,
2407 };
2408
2409 /* Decode UTF-8 multi-byte representation into a unicode character. */
2410 static inline unsigned long
2411 utf8_to_unicode(const char *string, size_t length)
2412 {
2413 unsigned long unicode;
2414
2415 switch (length) {
2416 case 1:
2417 unicode = string[0];
2418 break;
2419 case 2:
2420 unicode = (string[0] & 0x1f) << 6;
2421 unicode += (string[1] & 0x3f);
2422 break;
2423 case 3:
2424 unicode = (string[0] & 0x0f) << 12;
2425 unicode += ((string[1] & 0x3f) << 6);
2426 unicode += (string[2] & 0x3f);
2427 break;
2428 case 4:
2429 unicode = (string[0] & 0x0f) << 18;
2430 unicode += ((string[1] & 0x3f) << 12);
2431 unicode += ((string[2] & 0x3f) << 6);
2432 unicode += (string[3] & 0x3f);
2433 break;
2434 case 5:
2435 unicode = (string[0] & 0x0f) << 24;
2436 unicode += ((string[1] & 0x3f) << 18);
2437 unicode += ((string[2] & 0x3f) << 12);
2438 unicode += ((string[3] & 0x3f) << 6);
2439 unicode += (string[4] & 0x3f);
2440 break;
2441 case 6:
2442 unicode = (string[0] & 0x01) << 30;
2443 unicode += ((string[1] & 0x3f) << 24);
2444 unicode += ((string[2] & 0x3f) << 18);
2445 unicode += ((string[3] & 0x3f) << 12);
2446 unicode += ((string[4] & 0x3f) << 6);
2447 unicode += (string[5] & 0x3f);
2448 break;
2449 default:
2450 die("Invalid unicode length");
2451 }
2452
2453 /* Invalid characters could return the special 0xfffd value but NUL
2454 * should be just as good. */
2455 return unicode > 0xffff ? 0 : unicode;
2456 }
2457
2458 /* Calculates how much of string can be shown within the given maximum width
2459 * and sets trimmed parameter to non-zero value if all of string could not be
2460 * shown.
2461 *
2462 * Additionally, adds to coloffset how many many columns to move to align with
2463 * the expected position. Takes into account how multi-byte and double-width
2464 * characters will effect the cursor position.
2465 *
2466 * Returns the number of bytes to output from string to satisfy max_width. */
2467 static size_t
2468 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
2469 {
2470 const char *start = string;
2471 const char *end = strchr(string, '\0');
2472 size_t mbwidth = 0;
2473 size_t width = 0;
2474
2475 *trimmed = 0;
2476
2477 while (string < end) {
2478 int c = *(unsigned char *) string;
2479 unsigned char bytes = utf8_bytes[c];
2480 size_t ucwidth;
2481 unsigned long unicode;
2482
2483 if (string + bytes > end)
2484 break;
2485
2486 /* Change representation to figure out whether
2487 * it is a single- or double-width character. */
2488
2489 unicode = utf8_to_unicode(string, bytes);
2490 /* FIXME: Graceful handling of invalid unicode character. */
2491 if (!unicode)
2492 break;
2493
2494 ucwidth = unicode_width(unicode);
2495 width += ucwidth;
2496 if (width > max_width) {
2497 *trimmed = 1;
2498 break;
2499 }
2500
2501 /* The column offset collects the differences between the
2502 * number of bytes encoding a character and the number of
2503 * columns will be used for rendering said character.
2504 *
2505 * So if some character A is encoded in 2 bytes, but will be
2506 * represented on the screen using only 1 byte this will and up
2507 * adding 1 to the multi-byte column offset.
2508 *
2509 * Assumes that no double-width character can be encoding in
2510 * less than two bytes. */
2511 if (bytes > ucwidth)
2512 mbwidth += bytes - ucwidth;
2513
2514 string += bytes;
2515 }
2516
2517 *coloffset += mbwidth;
2518
2519 return string - start;
2520 }
2521
2522
2523 /*
2524 * Status management
2525 */
2526
2527 /* Whether or not the curses interface has been initialized. */
2528 static bool cursed = FALSE;
2529
2530 /* The status window is used for polling keystrokes. */
2531 static WINDOW *status_win;
2532
2533 /* Update status and title window. */
2534 static void
2535 report(const char *msg, ...)
2536 {
2537 static bool empty = TRUE;
2538 struct view *view = display[current_view];
2539
2540 if (!empty || *msg) {
2541 va_list args;
2542
2543 va_start(args, msg);
2544
2545 werase(status_win);
2546 wmove(status_win, 0, 0);
2547 if (*msg) {
2548 vwprintw(status_win, msg, args);
2549 empty = FALSE;
2550 } else {
2551 empty = TRUE;
2552 }
2553 wrefresh(status_win);
2554
2555 va_end(args);
2556 }
2557
2558 update_view_title(view);
2559 update_display_cursor();
2560 }
2561
2562 /* Controls when nodelay should be in effect when polling user input. */
2563 static void
2564 set_nonblocking_input(bool loading)
2565 {
2566 static unsigned int loading_views;
2567
2568 if ((loading == FALSE && loading_views-- == 1) ||
2569 (loading == TRUE && loading_views++ == 0))
2570 nodelay(status_win, loading);
2571 }
2572
2573 static void
2574 init_display(void)
2575 {
2576 int x, y;
2577
2578 /* Initialize the curses library */
2579 if (isatty(STDIN_FILENO)) {
2580 cursed = !!initscr();
2581 } else {
2582 /* Leave stdin and stdout alone when acting as a pager. */
2583 FILE *io = fopen("/dev/tty", "r+");
2584
2585 cursed = !!newterm(NULL, io, io);
2586 }
2587
2588 if (!cursed)
2589 die("Failed to initialize curses");
2590
2591 nonl(); /* Tell curses not to do NL->CR/NL on output */
2592 cbreak(); /* Take input chars one at a time, no wait for \n */
2593 noecho(); /* Don't echo input */
2594 leaveok(stdscr, TRUE);
2595
2596 if (has_colors())
2597 init_colors();
2598
2599 getmaxyx(stdscr, y, x);
2600 status_win = newwin(1, 0, y - 1, 0);
2601 if (!status_win)
2602 die("Failed to create status window");
2603
2604 /* Enable keyboard mapping */
2605 keypad(status_win, TRUE);
2606 wbkgdset(status_win, get_line_attr(LINE_STATUS));
2607 }
2608
2609 static int
2610 read_prompt(void)
2611 {
2612 enum { READING, STOP, CANCEL } status = READING;
2613 char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
2614 int pos = 0;
2615
2616 while (status == READING) {
2617 struct view *view;
2618 int i, key;
2619
2620 foreach_view (view, i)
2621 update_view(view);
2622
2623 report(":%.*s", pos, buf);
2624 /* Refresh, accept single keystroke of input */
2625 key = wgetch(status_win);
2626 switch (key) {
2627 case KEY_RETURN:
2628 case KEY_ENTER:
2629 case '\n':
2630 status = pos ? STOP : CANCEL;
2631 break;
2632
2633 case KEY_BACKSPACE:
2634 if (pos > 0)
2635 pos--;
2636 else
2637 status = CANCEL;
2638 break;
2639
2640 case KEY_ESC:
2641 status = CANCEL;
2642 break;
2643
2644 case ERR:
2645 break;
2646
2647 default:
2648 if (pos >= sizeof(buf)) {
2649 report("Input string too long");
2650 return ERR;
2651 }
2652
2653 if (isprint(key))
2654 buf[pos++] = (char) key;
2655 }
2656 }
2657
2658 if (status == CANCEL) {
2659 /* Clear the status window */
2660 report("");
2661 return ERR;
2662 }
2663
2664 buf[pos++] = 0;
2665 if (!string_format(opt_cmd, "git %s", buf))
2666 return ERR;
2667 opt_request = REQ_VIEW_PAGER;
2668
2669 return OK;
2670 }
2671
2672 /*
2673 * Repository references
2674 */
2675
2676 static struct ref *refs;
2677 static size_t refs_size;
2678
2679 /* Id <-> ref store */
2680 static struct ref ***id_refs;
2681 static size_t id_refs_size;
2682
2683 static struct ref **
2684 get_refs(char *id)
2685 {
2686 struct ref ***tmp_id_refs;
2687 struct ref **ref_list = NULL;
2688 size_t ref_list_size = 0;
2689 size_t i;
2690
2691 for (i = 0; i < id_refs_size; i++)
2692 if (!strcmp(id, id_refs[i][0]->id))
2693 return id_refs[i];
2694
2695 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
2696 if (!tmp_id_refs)
2697 return NULL;
2698
2699 id_refs = tmp_id_refs;
2700
2701 for (i = 0; i < refs_size; i++) {
2702 struct ref **tmp;
2703
2704 if (strcmp(id, refs[i].id))
2705 continue;
2706
2707 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
2708 if (!tmp) {
2709 if (ref_list)
2710 free(ref_list);
2711 return NULL;
2712 }
2713
2714 ref_list = tmp;
2715 if (ref_list_size > 0)
2716 ref_list[ref_list_size - 1]->next = 1;
2717 ref_list[ref_list_size] = &refs[i];
2718
2719 /* XXX: The properties of the commit chains ensures that we can
2720 * safely modify the shared ref. The repo references will
2721 * always be similar for the same id. */
2722 ref_list[ref_list_size]->next = 0;
2723 ref_list_size++;
2724 }
2725
2726 if (ref_list)
2727 id_refs[id_refs_size++] = ref_list;
2728
2729 return ref_list;
2730 }
2731
2732 static int
2733 read_ref(char *id, int idlen, char *name, int namelen)
2734 {
2735 struct ref *ref;
2736 bool tag = FALSE;
2737
2738 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
2739 /* Commits referenced by tags has "^{}" appended. */
2740 if (name[namelen - 1] != '}')
2741 return OK;
2742
2743 while (namelen > 0 && name[namelen] != '^')
2744 namelen--;
2745
2746 tag = TRUE;
2747 namelen -= STRING_SIZE("refs/tags/");
2748 name += STRING_SIZE("refs/tags/");
2749
2750 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
2751 namelen -= STRING_SIZE("refs/heads/");
2752 name += STRING_SIZE("refs/heads/");
2753
2754 } else if (!strcmp(name, "HEAD")) {
2755 return OK;
2756 }
2757
2758 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
2759 if (!refs)
2760 return ERR;
2761
2762 ref = &refs[refs_size++];
2763 ref->name = malloc(namelen + 1);
2764 if (!ref->name)
2765 return ERR;
2766
2767 strncpy(ref->name, name, namelen);
2768 ref->name[namelen] = 0;
2769 ref->tag = tag;
2770 string_copy(ref->id, id);
2771
2772 return OK;
2773 }
2774
2775 static int
2776 load_refs(void)
2777 {
2778 const char *cmd_env = getenv("TIG_LS_REMOTE");
2779 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
2780
2781 return read_properties(popen(cmd, "r"), "\t", read_ref);
2782 }
2783
2784 static int
2785 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
2786 {
2787 if (!strcmp(name, "i18n.commitencoding"))
2788 string_copy(opt_encoding, value);
2789
2790 return OK;
2791 }
2792
2793 static int
2794 load_repo_config(void)
2795 {
2796 return read_properties(popen("git repo-config --list", "r"),
2797 "=", read_repo_config_option);
2798 }
2799
2800 static int
2801 read_properties(FILE *pipe, const char *separators,
2802 int (*read_property)(char *, int, char *, int))
2803 {
2804 char buffer[BUFSIZ];
2805 char *name;
2806 int state = OK;
2807
2808 if (!pipe)
2809 return ERR;
2810
2811 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
2812 char *value;
2813 size_t namelen;
2814 size_t valuelen;
2815
2816 name = chomp_string(name);
2817 namelen = strcspn(name, separators);
2818
2819 if (name[namelen]) {
2820 name[namelen] = 0;
2821 value = chomp_string(name + namelen + 1);
2822 valuelen = strlen(value);
2823
2824 } else {
2825 value = "";
2826 valuelen = 0;
2827 }
2828
2829 state = read_property(name, namelen, value, valuelen);
2830 }
2831
2832 if (state != ERR && ferror(pipe))
2833 state = ERR;
2834
2835 pclose(pipe);
2836
2837 return state;
2838 }
2839
2840
2841 /*
2842 * Main
2843 */
2844
2845 static void __NORETURN
2846 quit(int sig)
2847 {
2848 /* XXX: Restore tty modes and let the OS cleanup the rest! */
2849 if (cursed)
2850 endwin();
2851 exit(0);
2852 }
2853
2854 static void __NORETURN
2855 die(const char *err, ...)
2856 {
2857 va_list args;
2858
2859 endwin();
2860
2861 va_start(args, err);
2862 fputs("tig: ", stderr);
2863 vfprintf(stderr, err, args);
2864 fputs("\n", stderr);
2865 va_end(args);
2866
2867 exit(1);
2868 }
2869
2870 int
2871 main(int argc, char *argv[])
2872 {
2873 struct view *view;
2874 enum request request;
2875 size_t i;
2876
2877 signal(SIGINT, quit);
2878
2879 if (load_options() == ERR)
2880 die("Failed to load user config.");
2881
2882 /* Load the repo config file so options can be overwritten from
2883 * the command line. */
2884 if (load_repo_config() == ERR)
2885 die("Failed to load repo config.");
2886
2887 if (!parse_options(argc, argv))
2888 return 0;
2889
2890 if (load_refs() == ERR)
2891 die("Failed to load refs.");
2892
2893 /* Require a git repository unless when running in pager mode. */
2894 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
2895 die("Not a git repository");
2896
2897 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
2898 view->cmd_env = getenv(view->cmd_env);
2899
2900 request = opt_request;
2901
2902 init_display();
2903
2904 while (view_driver(display[current_view], request)) {
2905 int key;
2906 int i;
2907
2908 foreach_view (view, i)
2909 update_view(view);
2910
2911 /* Refresh, accept single keystroke of input */
2912 key = wgetch(status_win);
2913
2914 request = get_keybinding(display[current_view]->keymap, key);
2915
2916 /* Some low-level request handling. This keeps access to
2917 * status_win restricted. */
2918 switch (request) {
2919 case REQ_PROMPT:
2920 if (read_prompt() == ERR)
2921 request = REQ_SCREEN_UPDATE;
2922 break;
2923
2924 case REQ_SCREEN_RESIZE:
2925 {
2926 int height, width;
2927
2928 getmaxyx(stdscr, height, width);
2929
2930 /* Resize the status view and let the view driver take
2931 * care of resizing the displayed views. */
2932 wresize(status_win, 1, width);
2933 mvwin(status_win, height - 1, 0);
2934 wrefresh(status_win);
2935 break;
2936 }
2937 default:
2938 break;
2939 }
2940 }
2941
2942 quit(0);
2943
2944 return 0;
2945 }
Full-screen terminal Git browser.