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Add support for tree and blob 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-0.4.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_REVGRAPH 19 /* Size of revision ancestry graphics. */
63
64 /* This color name can be used to refer to the default term colors. */
65 #define COLOR_DEFAULT (-1)
66
67 #define ICONV_NONE ((iconv_t) -1)
68
69 /* The format and size of the date column in the main view. */
70 #define DATE_FORMAT "%Y-%m-%d %H:%M"
71 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
72
73 #define AUTHOR_COLS 20
74
75 /* The default interval between line numbers. */
76 #define NUMBER_INTERVAL 1
77
78 #define TABSIZE 8
79
80 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
81
82 #define TIG_LS_REMOTE \
83 "git ls-remote . 2>/dev/null"
84
85 #define TIG_DIFF_CMD \
86 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
87
88 #define TIG_LOG_CMD \
89 "git log --cc --stat -n100 %s 2>/dev/null"
90
91 #define TIG_MAIN_CMD \
92 "git log --topo-order --pretty=raw %s 2>/dev/null"
93
94 #define TIG_TREE_CMD \
95 "git ls-tree %s %s"
96
97 #define TIG_BLOB_CMD \
98 "git cat-file blob %s"
99
100 /* XXX: Needs to be defined to the empty string. */
101 #define TIG_HELP_CMD ""
102 #define TIG_PAGER_CMD ""
103
104 /* Some ascii-shorthands fitted into the ncurses namespace. */
105 #define KEY_TAB '\t'
106 #define KEY_RETURN '\r'
107 #define KEY_ESC 27
108
109
110 struct ref {
111 char *name; /* Ref name; tag or head names are shortened. */
112 char id[41]; /* Commit SHA1 ID */
113 unsigned int tag:1; /* Is it a tag? */
114 unsigned int next:1; /* For ref lists: are there more refs? */
115 };
116
117 static struct ref **get_refs(char *id);
118
119 struct int_map {
120 const char *name;
121 int namelen;
122 int value;
123 };
124
125 static int
126 set_from_int_map(struct int_map *map, size_t map_size,
127 int *value, const char *name, int namelen)
128 {
129
130 int i;
131
132 for (i = 0; i < map_size; i++)
133 if (namelen == map[i].namelen &&
134 !strncasecmp(name, map[i].name, namelen)) {
135 *value = map[i].value;
136 return OK;
137 }
138
139 return ERR;
140 }
141
142
143 /*
144 * String helpers
145 */
146
147 static inline void
148 string_ncopy(char *dst, const char *src, int dstlen)
149 {
150 strncpy(dst, src, dstlen - 1);
151 dst[dstlen - 1] = 0;
152
153 }
154
155 /* Shorthand for safely copying into a fixed buffer. */
156 #define string_copy(dst, src) \
157 string_ncopy(dst, src, sizeof(dst))
158
159 static char *
160 chomp_string(char *name)
161 {
162 int namelen;
163
164 while (isspace(*name))
165 name++;
166
167 namelen = strlen(name) - 1;
168 while (namelen > 0 && isspace(name[namelen]))
169 name[namelen--] = 0;
170
171 return name;
172 }
173
174 static bool
175 string_nformat(char *buf, size_t bufsize, int *bufpos, const char *fmt, ...)
176 {
177 va_list args;
178 int pos = bufpos ? *bufpos : 0;
179
180 va_start(args, fmt);
181 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
182 va_end(args);
183
184 if (bufpos)
185 *bufpos = pos;
186
187 return pos >= bufsize ? FALSE : TRUE;
188 }
189
190 #define string_format(buf, fmt, args...) \
191 string_nformat(buf, sizeof(buf), NULL, fmt, args)
192
193 #define string_format_from(buf, from, fmt, args...) \
194 string_nformat(buf, sizeof(buf), from, fmt, args)
195
196 static int
197 string_enum_compare(const char *str1, const char *str2, int len)
198 {
199 size_t i;
200
201 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
202
203 /* Diff-Header == DIFF_HEADER */
204 for (i = 0; i < len; i++) {
205 if (toupper(str1[i]) == toupper(str2[i]))
206 continue;
207
208 if (string_enum_sep(str1[i]) &&
209 string_enum_sep(str2[i]))
210 continue;
211
212 return str1[i] - str2[i];
213 }
214
215 return 0;
216 }
217
218 /* Shell quoting
219 *
220 * NOTE: The following is a slightly modified copy of the git project's shell
221 * quoting routines found in the quote.c file.
222 *
223 * Help to copy the thing properly quoted for the shell safety. any single
224 * quote is replaced with '\'', any exclamation point is replaced with '\!',
225 * and the whole thing is enclosed in a
226 *
227 * E.g.
228 * original sq_quote result
229 * name ==> name ==> 'name'
230 * a b ==> a b ==> 'a b'
231 * a'b ==> a'\''b ==> 'a'\''b'
232 * a!b ==> a'\!'b ==> 'a'\!'b'
233 */
234
235 static size_t
236 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
237 {
238 char c;
239
240 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
241
242 BUFPUT('\'');
243 while ((c = *src++)) {
244 if (c == '\'' || c == '!') {
245 BUFPUT('\'');
246 BUFPUT('\\');
247 BUFPUT(c);
248 BUFPUT('\'');
249 } else {
250 BUFPUT(c);
251 }
252 }
253 BUFPUT('\'');
254
255 return bufsize;
256 }
257
258
259 /*
260 * User requests
261 */
262
263 #define REQ_INFO \
264 /* XXX: Keep the view request first and in sync with views[]. */ \
265 REQ_GROUP("View switching") \
266 REQ_(VIEW_MAIN, "Show main view"), \
267 REQ_(VIEW_DIFF, "Show diff view"), \
268 REQ_(VIEW_LOG, "Show log view"), \
269 REQ_(VIEW_TREE, "Show tree view"), \
270 REQ_(VIEW_BLOB, "Show blob view"), \
271 REQ_(VIEW_HELP, "Show help page"), \
272 REQ_(VIEW_PAGER, "Show pager view"), \
273 \
274 REQ_GROUP("View manipulation") \
275 REQ_(ENTER, "Enter current line and scroll"), \
276 REQ_(NEXT, "Move to next"), \
277 REQ_(PREVIOUS, "Move to previous"), \
278 REQ_(VIEW_NEXT, "Move focus to next view"), \
279 REQ_(VIEW_CLOSE, "Close the current view"), \
280 REQ_(QUIT, "Close all views and quit"), \
281 \
282 REQ_GROUP("Cursor navigation") \
283 REQ_(MOVE_UP, "Move cursor one line up"), \
284 REQ_(MOVE_DOWN, "Move cursor one line down"), \
285 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
286 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
287 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
288 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
289 \
290 REQ_GROUP("Scrolling") \
291 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
292 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
293 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
294 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
295 \
296 REQ_GROUP("Searching") \
297 REQ_(SEARCH, "Search the view"), \
298 REQ_(SEARCH_BACK, "Search backwards in the view"), \
299 REQ_(FIND_NEXT, "Find next search match"), \
300 REQ_(FIND_PREV, "Find previous search match"), \
301 \
302 REQ_GROUP("Misc") \
303 REQ_(NONE, "Do nothing"), \
304 REQ_(PROMPT, "Bring up the prompt"), \
305 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
306 REQ_(SCREEN_RESIZE, "Resize the screen"), \
307 REQ_(SHOW_VERSION, "Show version information"), \
308 REQ_(STOP_LOADING, "Stop all loading views"), \
309 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
310 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
311
312
313 /* User action requests. */
314 enum request {
315 #define REQ_GROUP(help)
316 #define REQ_(req, help) REQ_##req
317
318 /* Offset all requests to avoid conflicts with ncurses getch values. */
319 REQ_OFFSET = KEY_MAX + 1,
320 REQ_INFO,
321 REQ_UNKNOWN,
322
323 #undef REQ_GROUP
324 #undef REQ_
325 };
326
327 struct request_info {
328 enum request request;
329 char *name;
330 int namelen;
331 char *help;
332 };
333
334 static struct request_info req_info[] = {
335 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
336 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
337 REQ_INFO
338 #undef REQ_GROUP
339 #undef REQ_
340 };
341
342 static enum request
343 get_request(const char *name)
344 {
345 int namelen = strlen(name);
346 int i;
347
348 for (i = 0; i < ARRAY_SIZE(req_info); i++)
349 if (req_info[i].namelen == namelen &&
350 !string_enum_compare(req_info[i].name, name, namelen))
351 return req_info[i].request;
352
353 return REQ_UNKNOWN;
354 }
355
356
357 /*
358 * Options
359 */
360
361 static const char usage[] =
362 VERSION " (" __DATE__ ")\n"
363 "\n"
364 "Usage: tig [options]\n"
365 " or: tig [options] [--] [git log options]\n"
366 " or: tig [options] log [git log options]\n"
367 " or: tig [options] diff [git diff options]\n"
368 " or: tig [options] show [git show options]\n"
369 " or: tig [options] < [git command output]\n"
370 "\n"
371 "Options:\n"
372 " -l Start up in log view\n"
373 " -d Start up in diff view\n"
374 " -n[I], --line-number[=I] Show line numbers with given interval\n"
375 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
376 " -- Mark end of tig options\n"
377 " -v, --version Show version and exit\n"
378 " -h, --help Show help message and exit\n";
379
380 /* Option and state variables. */
381 static bool opt_line_number = FALSE;
382 static bool opt_rev_graph = TRUE;
383 static int opt_num_interval = NUMBER_INTERVAL;
384 static int opt_tab_size = TABSIZE;
385 static enum request opt_request = REQ_VIEW_MAIN;
386 static char opt_cmd[SIZEOF_STR] = "";
387 static char opt_path[SIZEOF_STR] = "";
388 static FILE *opt_pipe = NULL;
389 static char opt_encoding[20] = "UTF-8";
390 static bool opt_utf8 = TRUE;
391 static char opt_codeset[20] = "UTF-8";
392 static iconv_t opt_iconv = ICONV_NONE;
393 static char opt_search[SIZEOF_STR] = "";
394
395 enum option_type {
396 OPT_NONE,
397 OPT_INT,
398 };
399
400 static bool
401 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
402 {
403 va_list args;
404 char *value = "";
405 int *number;
406
407 if (opt[0] != '-')
408 return FALSE;
409
410 if (opt[1] == '-') {
411 int namelen = strlen(name);
412
413 opt += 2;
414
415 if (strncmp(opt, name, namelen))
416 return FALSE;
417
418 if (opt[namelen] == '=')
419 value = opt + namelen + 1;
420
421 } else {
422 if (!short_name || opt[1] != short_name)
423 return FALSE;
424 value = opt + 2;
425 }
426
427 va_start(args, type);
428 if (type == OPT_INT) {
429 number = va_arg(args, int *);
430 if (isdigit(*value))
431 *number = atoi(value);
432 }
433 va_end(args);
434
435 return TRUE;
436 }
437
438 /* Returns the index of log or diff command or -1 to exit. */
439 static bool
440 parse_options(int argc, char *argv[])
441 {
442 int i;
443
444 for (i = 1; i < argc; i++) {
445 char *opt = argv[i];
446
447 if (!strcmp(opt, "-l")) {
448 opt_request = REQ_VIEW_LOG;
449 continue;
450 }
451
452 if (!strcmp(opt, "-d")) {
453 opt_request = REQ_VIEW_DIFF;
454 continue;
455 }
456
457 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
458 opt_line_number = TRUE;
459 continue;
460 }
461
462 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
463 opt_tab_size = MIN(opt_tab_size, TABSIZE);
464 continue;
465 }
466
467 if (check_option(opt, 'v', "version", OPT_NONE)) {
468 printf("tig version %s\n", VERSION);
469 return FALSE;
470 }
471
472 if (check_option(opt, 'h', "help", OPT_NONE)) {
473 printf(usage);
474 return FALSE;
475 }
476
477 if (!strcmp(opt, "--")) {
478 i++;
479 break;
480 }
481
482 if (!strcmp(opt, "log") ||
483 !strcmp(opt, "diff") ||
484 !strcmp(opt, "show")) {
485 opt_request = opt[0] == 'l'
486 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
487 break;
488 }
489
490 if (opt[0] && opt[0] != '-')
491 break;
492
493 die("unknown option '%s'\n\n%s", opt, usage);
494 }
495
496 if (!isatty(STDIN_FILENO)) {
497 opt_request = REQ_VIEW_PAGER;
498 opt_pipe = stdin;
499
500 } else if (i < argc) {
501 size_t buf_size;
502
503 if (opt_request == REQ_VIEW_MAIN)
504 /* XXX: This is vulnerable to the user overriding
505 * options required for the main view parser. */
506 string_copy(opt_cmd, "git log --stat --pretty=raw");
507 else
508 string_copy(opt_cmd, "git");
509 buf_size = strlen(opt_cmd);
510
511 while (buf_size < sizeof(opt_cmd) && i < argc) {
512 opt_cmd[buf_size++] = ' ';
513 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
514 }
515
516 if (buf_size >= sizeof(opt_cmd))
517 die("command too long");
518
519 opt_cmd[buf_size] = 0;
520
521 }
522
523 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
524 opt_utf8 = FALSE;
525
526 return TRUE;
527 }
528
529
530 /*
531 * Line-oriented content detection.
532 */
533
534 #define LINE_INFO \
535 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
536 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
537 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
538 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
539 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
540 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
541 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
542 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
543 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
544 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
545 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
546 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
547 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
548 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
549 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
550 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
551 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
552 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
553 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
554 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
555 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
556 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
557 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
558 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
559 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
560 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
561 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
562 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
563 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
564 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
565 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
566 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
567 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
568 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
569 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
570 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
571 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
572 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
573 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
574 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
575
576 enum line_type {
577 #define LINE(type, line, fg, bg, attr) \
578 LINE_##type
579 LINE_INFO
580 #undef LINE
581 };
582
583 struct line_info {
584 const char *name; /* Option name. */
585 int namelen; /* Size of option name. */
586 const char *line; /* The start of line to match. */
587 int linelen; /* Size of string to match. */
588 int fg, bg, attr; /* Color and text attributes for the lines. */
589 };
590
591 static struct line_info line_info[] = {
592 #define LINE(type, line, fg, bg, attr) \
593 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
594 LINE_INFO
595 #undef LINE
596 };
597
598 static enum line_type
599 get_line_type(char *line)
600 {
601 int linelen = strlen(line);
602 enum line_type type;
603
604 for (type = 0; type < ARRAY_SIZE(line_info); type++)
605 /* Case insensitive search matches Signed-off-by lines better. */
606 if (linelen >= line_info[type].linelen &&
607 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
608 return type;
609
610 return LINE_DEFAULT;
611 }
612
613 static inline int
614 get_line_attr(enum line_type type)
615 {
616 assert(type < ARRAY_SIZE(line_info));
617 return COLOR_PAIR(type) | line_info[type].attr;
618 }
619
620 static struct line_info *
621 get_line_info(char *name, int namelen)
622 {
623 enum line_type type;
624
625 for (type = 0; type < ARRAY_SIZE(line_info); type++)
626 if (namelen == line_info[type].namelen &&
627 !string_enum_compare(line_info[type].name, name, namelen))
628 return &line_info[type];
629
630 return NULL;
631 }
632
633 static void
634 init_colors(void)
635 {
636 int default_bg = COLOR_BLACK;
637 int default_fg = COLOR_WHITE;
638 enum line_type type;
639
640 start_color();
641
642 if (use_default_colors() != ERR) {
643 default_bg = -1;
644 default_fg = -1;
645 }
646
647 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
648 struct line_info *info = &line_info[type];
649 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
650 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
651
652 init_pair(type, fg, bg);
653 }
654 }
655
656 struct line {
657 enum line_type type;
658 void *data; /* User data */
659 };
660
661
662 /*
663 * Keys
664 */
665
666 struct keybinding {
667 int alias;
668 enum request request;
669 struct keybinding *next;
670 };
671
672 static struct keybinding default_keybindings[] = {
673 /* View switching */
674 { 'm', REQ_VIEW_MAIN },
675 { 'd', REQ_VIEW_DIFF },
676 { 'l', REQ_VIEW_LOG },
677 { 't', REQ_VIEW_TREE },
678 { 'b', REQ_VIEW_BLOB },
679 { 'p', REQ_VIEW_PAGER },
680 { 'h', REQ_VIEW_HELP },
681
682 /* View manipulation */
683 { 'q', REQ_VIEW_CLOSE },
684 { KEY_TAB, REQ_VIEW_NEXT },
685 { KEY_RETURN, REQ_ENTER },
686 { KEY_UP, REQ_PREVIOUS },
687 { KEY_DOWN, REQ_NEXT },
688
689 /* Cursor navigation */
690 { 'k', REQ_MOVE_UP },
691 { 'j', REQ_MOVE_DOWN },
692 { KEY_HOME, REQ_MOVE_FIRST_LINE },
693 { KEY_END, REQ_MOVE_LAST_LINE },
694 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
695 { ' ', REQ_MOVE_PAGE_DOWN },
696 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
697 { 'b', REQ_MOVE_PAGE_UP },
698 { '-', REQ_MOVE_PAGE_UP },
699
700 /* Scrolling */
701 { KEY_IC, REQ_SCROLL_LINE_UP },
702 { KEY_DC, REQ_SCROLL_LINE_DOWN },
703 { 'w', REQ_SCROLL_PAGE_UP },
704 { 's', REQ_SCROLL_PAGE_DOWN },
705
706 /* Searching */
707 { '/', REQ_SEARCH },
708 { '?', REQ_SEARCH_BACK },
709 { 'n', REQ_FIND_NEXT },
710 { 'N', REQ_FIND_PREV },
711
712 /* Misc */
713 { 'Q', REQ_QUIT },
714 { 'z', REQ_STOP_LOADING },
715 { 'v', REQ_SHOW_VERSION },
716 { 'r', REQ_SCREEN_REDRAW },
717 { 'n', REQ_TOGGLE_LINENO },
718 { 'g', REQ_TOGGLE_REV_GRAPH },
719 { ':', REQ_PROMPT },
720
721 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
722 { ERR, REQ_NONE },
723
724 /* Using the ncurses SIGWINCH handler. */
725 { KEY_RESIZE, REQ_SCREEN_RESIZE },
726 };
727
728 #define KEYMAP_INFO \
729 KEYMAP_(GENERIC), \
730 KEYMAP_(MAIN), \
731 KEYMAP_(DIFF), \
732 KEYMAP_(LOG), \
733 KEYMAP_(TREE), \
734 KEYMAP_(BLOB), \
735 KEYMAP_(PAGER), \
736 KEYMAP_(HELP) \
737
738 enum keymap {
739 #define KEYMAP_(name) KEYMAP_##name
740 KEYMAP_INFO
741 #undef KEYMAP_
742 };
743
744 static struct int_map keymap_table[] = {
745 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
746 KEYMAP_INFO
747 #undef KEYMAP_
748 };
749
750 #define set_keymap(map, name) \
751 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
752
753 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
754
755 static void
756 add_keybinding(enum keymap keymap, enum request request, int key)
757 {
758 struct keybinding *keybinding;
759
760 keybinding = calloc(1, sizeof(*keybinding));
761 if (!keybinding)
762 die("Failed to allocate keybinding");
763
764 keybinding->alias = key;
765 keybinding->request = request;
766 keybinding->next = keybindings[keymap];
767 keybindings[keymap] = keybinding;
768 }
769
770 /* Looks for a key binding first in the given map, then in the generic map, and
771 * lastly in the default keybindings. */
772 static enum request
773 get_keybinding(enum keymap keymap, int key)
774 {
775 struct keybinding *kbd;
776 int i;
777
778 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
779 if (kbd->alias == key)
780 return kbd->request;
781
782 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
783 if (kbd->alias == key)
784 return kbd->request;
785
786 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
787 if (default_keybindings[i].alias == key)
788 return default_keybindings[i].request;
789
790 return (enum request) key;
791 }
792
793
794 struct key {
795 char *name;
796 int value;
797 };
798
799 static struct key key_table[] = {
800 { "Enter", KEY_RETURN },
801 { "Space", ' ' },
802 { "Backspace", KEY_BACKSPACE },
803 { "Tab", KEY_TAB },
804 { "Escape", KEY_ESC },
805 { "Left", KEY_LEFT },
806 { "Right", KEY_RIGHT },
807 { "Up", KEY_UP },
808 { "Down", KEY_DOWN },
809 { "Insert", KEY_IC },
810 { "Delete", KEY_DC },
811 { "Hash", '#' },
812 { "Home", KEY_HOME },
813 { "End", KEY_END },
814 { "PageUp", KEY_PPAGE },
815 { "PageDown", KEY_NPAGE },
816 { "F1", KEY_F(1) },
817 { "F2", KEY_F(2) },
818 { "F3", KEY_F(3) },
819 { "F4", KEY_F(4) },
820 { "F5", KEY_F(5) },
821 { "F6", KEY_F(6) },
822 { "F7", KEY_F(7) },
823 { "F8", KEY_F(8) },
824 { "F9", KEY_F(9) },
825 { "F10", KEY_F(10) },
826 { "F11", KEY_F(11) },
827 { "F12", KEY_F(12) },
828 };
829
830 static int
831 get_key_value(const char *name)
832 {
833 int i;
834
835 for (i = 0; i < ARRAY_SIZE(key_table); i++)
836 if (!strcasecmp(key_table[i].name, name))
837 return key_table[i].value;
838
839 if (strlen(name) == 1 && isprint(*name))
840 return (int) *name;
841
842 return ERR;
843 }
844
845 static char *
846 get_key(enum request request)
847 {
848 static char buf[BUFSIZ];
849 static char key_char[] = "'X'";
850 int pos = 0;
851 char *sep = " ";
852 int i;
853
854 buf[pos] = 0;
855
856 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
857 struct keybinding *keybinding = &default_keybindings[i];
858 char *seq = NULL;
859 int key;
860
861 if (keybinding->request != request)
862 continue;
863
864 for (key = 0; key < ARRAY_SIZE(key_table); key++)
865 if (key_table[key].value == keybinding->alias)
866 seq = key_table[key].name;
867
868 if (seq == NULL &&
869 keybinding->alias < 127 &&
870 isprint(keybinding->alias)) {
871 key_char[1] = (char) keybinding->alias;
872 seq = key_char;
873 }
874
875 if (!seq)
876 seq = "'?'";
877
878 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
879 return "Too many keybindings!";
880 sep = ", ";
881 }
882
883 return buf;
884 }
885
886
887 /*
888 * User config file handling.
889 */
890
891 static struct int_map color_map[] = {
892 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
893 COLOR_MAP(DEFAULT),
894 COLOR_MAP(BLACK),
895 COLOR_MAP(BLUE),
896 COLOR_MAP(CYAN),
897 COLOR_MAP(GREEN),
898 COLOR_MAP(MAGENTA),
899 COLOR_MAP(RED),
900 COLOR_MAP(WHITE),
901 COLOR_MAP(YELLOW),
902 };
903
904 #define set_color(color, name) \
905 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
906
907 static struct int_map attr_map[] = {
908 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
909 ATTR_MAP(NORMAL),
910 ATTR_MAP(BLINK),
911 ATTR_MAP(BOLD),
912 ATTR_MAP(DIM),
913 ATTR_MAP(REVERSE),
914 ATTR_MAP(STANDOUT),
915 ATTR_MAP(UNDERLINE),
916 };
917
918 #define set_attribute(attr, name) \
919 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
920
921 static int config_lineno;
922 static bool config_errors;
923 static char *config_msg;
924
925 /* Wants: object fgcolor bgcolor [attr] */
926 static int
927 option_color_command(int argc, char *argv[])
928 {
929 struct line_info *info;
930
931 if (argc != 3 && argc != 4) {
932 config_msg = "Wrong number of arguments given to color command";
933 return ERR;
934 }
935
936 info = get_line_info(argv[0], strlen(argv[0]));
937 if (!info) {
938 config_msg = "Unknown color name";
939 return ERR;
940 }
941
942 if (set_color(&info->fg, argv[1]) == ERR ||
943 set_color(&info->bg, argv[2]) == ERR) {
944 config_msg = "Unknown color";
945 return ERR;
946 }
947
948 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
949 config_msg = "Unknown attribute";
950 return ERR;
951 }
952
953 return OK;
954 }
955
956 /* Wants: name = value */
957 static int
958 option_set_command(int argc, char *argv[])
959 {
960 if (argc != 3) {
961 config_msg = "Wrong number of arguments given to set command";
962 return ERR;
963 }
964
965 if (strcmp(argv[1], "=")) {
966 config_msg = "No value assigned";
967 return ERR;
968 }
969
970 if (!strcmp(argv[0], "show-rev-graph")) {
971 opt_rev_graph = (!strcmp(argv[2], "1") ||
972 !strcmp(argv[2], "true") ||
973 !strcmp(argv[2], "yes"));
974 return OK;
975 }
976
977 if (!strcmp(argv[0], "line-number-interval")) {
978 opt_num_interval = atoi(argv[2]);
979 return OK;
980 }
981
982 if (!strcmp(argv[0], "tab-size")) {
983 opt_tab_size = atoi(argv[2]);
984 return OK;
985 }
986
987 if (!strcmp(argv[0], "commit-encoding")) {
988 char *arg = argv[2];
989 int delimiter = *arg;
990 int i;
991
992 switch (delimiter) {
993 case '"':
994 case '\'':
995 for (arg++, i = 0; arg[i]; i++)
996 if (arg[i] == delimiter) {
997 arg[i] = 0;
998 break;
999 }
1000 default:
1001 string_copy(opt_encoding, arg);
1002 return OK;
1003 }
1004 }
1005
1006 config_msg = "Unknown variable name";
1007 return ERR;
1008 }
1009
1010 /* Wants: mode request key */
1011 static int
1012 option_bind_command(int argc, char *argv[])
1013 {
1014 enum request request;
1015 int keymap;
1016 int key;
1017
1018 if (argc != 3) {
1019 config_msg = "Wrong number of arguments given to bind command";
1020 return ERR;
1021 }
1022
1023 if (set_keymap(&keymap, argv[0]) == ERR) {
1024 config_msg = "Unknown key map";
1025 return ERR;
1026 }
1027
1028 key = get_key_value(argv[1]);
1029 if (key == ERR) {
1030 config_msg = "Unknown key";
1031 return ERR;
1032 }
1033
1034 request = get_request(argv[2]);
1035 if (request == REQ_UNKNOWN) {
1036 config_msg = "Unknown request name";
1037 return ERR;
1038 }
1039
1040 add_keybinding(keymap, request, key);
1041
1042 return OK;
1043 }
1044
1045 static int
1046 set_option(char *opt, char *value)
1047 {
1048 char *argv[16];
1049 int valuelen;
1050 int argc = 0;
1051
1052 /* Tokenize */
1053 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1054 argv[argc++] = value;
1055
1056 value += valuelen;
1057 if (!*value)
1058 break;
1059
1060 *value++ = 0;
1061 while (isspace(*value))
1062 value++;
1063 }
1064
1065 if (!strcmp(opt, "color"))
1066 return option_color_command(argc, argv);
1067
1068 if (!strcmp(opt, "set"))
1069 return option_set_command(argc, argv);
1070
1071 if (!strcmp(opt, "bind"))
1072 return option_bind_command(argc, argv);
1073
1074 config_msg = "Unknown option command";
1075 return ERR;
1076 }
1077
1078 static int
1079 read_option(char *opt, int optlen, char *value, int valuelen)
1080 {
1081 int status = OK;
1082
1083 config_lineno++;
1084 config_msg = "Internal error";
1085
1086 /* Check for comment markers, since read_properties() will
1087 * only ensure opt and value are split at first " \t". */
1088 optlen = strcspn(opt, "#");
1089 if (optlen == 0)
1090 return OK;
1091
1092 if (opt[optlen] != 0) {
1093 config_msg = "No option value";
1094 status = ERR;
1095
1096 } else {
1097 /* Look for comment endings in the value. */
1098 int len = strcspn(value, "#");
1099
1100 if (len < valuelen) {
1101 valuelen = len;
1102 value[valuelen] = 0;
1103 }
1104
1105 status = set_option(opt, value);
1106 }
1107
1108 if (status == ERR) {
1109 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1110 config_lineno, optlen, opt, config_msg);
1111 config_errors = TRUE;
1112 }
1113
1114 /* Always keep going if errors are encountered. */
1115 return OK;
1116 }
1117
1118 static int
1119 load_options(void)
1120 {
1121 char *home = getenv("HOME");
1122 char buf[SIZEOF_STR];
1123 FILE *file;
1124
1125 config_lineno = 0;
1126 config_errors = FALSE;
1127
1128 if (!home || !string_format(buf, "%s/.tigrc", home))
1129 return ERR;
1130
1131 /* It's ok that the file doesn't exist. */
1132 file = fopen(buf, "r");
1133 if (!file)
1134 return OK;
1135
1136 if (read_properties(file, " \t", read_option) == ERR ||
1137 config_errors == TRUE)
1138 fprintf(stderr, "Errors while loading %s.\n", buf);
1139
1140 return OK;
1141 }
1142
1143
1144 /*
1145 * The viewer
1146 */
1147
1148 struct view;
1149 struct view_ops;
1150
1151 /* The display array of active views and the index of the current view. */
1152 static struct view *display[2];
1153 static unsigned int current_view;
1154
1155 #define foreach_view(view, i) \
1156 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1157
1158 #define displayed_views() (display[1] != NULL ? 2 : 1)
1159
1160 /* Current head and commit ID */
1161 static char ref_blob[SIZEOF_REF] = "";
1162 static char ref_commit[SIZEOF_REF] = "HEAD";
1163 static char ref_head[SIZEOF_REF] = "HEAD";
1164
1165 struct view {
1166 const char *name; /* View name */
1167 const char *cmd_fmt; /* Default command line format */
1168 const char *cmd_env; /* Command line set via environment */
1169 const char *id; /* Points to either of ref_{head,commit,blob} */
1170
1171 struct view_ops *ops; /* View operations */
1172
1173 enum keymap keymap; /* What keymap does this view have */
1174
1175 char cmd[SIZEOF_STR]; /* Command buffer */
1176 char ref[SIZEOF_REF]; /* Hovered commit reference */
1177 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1178
1179 int height, width; /* The width and height of the main window */
1180 WINDOW *win; /* The main window */
1181 WINDOW *title; /* The title window living below the main window */
1182
1183 /* Navigation */
1184 unsigned long offset; /* Offset of the window top */
1185 unsigned long lineno; /* Current line number */
1186
1187 /* Searching */
1188 char grep[SIZEOF_STR]; /* Search string */
1189 regex_t regex; /* Pre-compiled regex */
1190
1191 /* If non-NULL, points to the view that opened this view. If this view
1192 * is closed tig will switch back to the parent view. */
1193 struct view *parent;
1194
1195 /* Buffering */
1196 unsigned long lines; /* Total number of lines */
1197 struct line *line; /* Line index */
1198 unsigned long line_size;/* Total number of allocated lines */
1199 unsigned int digits; /* Number of digits in the lines member. */
1200
1201 /* Loading */
1202 FILE *pipe;
1203 time_t start_time;
1204 };
1205
1206 struct view_ops {
1207 /* What type of content being displayed. Used in the title bar. */
1208 const char *type;
1209 /* Draw one line; @lineno must be < view->height. */
1210 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1211 /* Read one line; updates view->line. */
1212 bool (*read)(struct view *view, char *data);
1213 /* Depending on view, change display based on current line. */
1214 bool (*enter)(struct view *view, struct line *line);
1215 /* Search for regex in a line. */
1216 bool (*grep)(struct view *view, struct line *line);
1217 };
1218
1219 static struct view_ops pager_ops;
1220 static struct view_ops main_ops;
1221 static struct view_ops tree_ops;
1222 static struct view_ops blob_ops;
1223
1224 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1225 { name, cmd, #env, ref, ops, map}
1226
1227 #define VIEW_(id, name, ops, ref) \
1228 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1229
1230
1231 static struct view views[] = {
1232 VIEW_(MAIN, "main", &main_ops, ref_head),
1233 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1234 VIEW_(LOG, "log", &pager_ops, ref_head),
1235 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1236 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1237 VIEW_(HELP, "help", &pager_ops, "static"),
1238 VIEW_(PAGER, "pager", &pager_ops, "static"),
1239 };
1240
1241 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1242
1243
1244 static bool
1245 draw_view_line(struct view *view, unsigned int lineno)
1246 {
1247 if (view->offset + lineno >= view->lines)
1248 return FALSE;
1249
1250 return view->ops->draw(view, &view->line[view->offset + lineno], lineno);
1251 }
1252
1253 static void
1254 redraw_view_from(struct view *view, int lineno)
1255 {
1256 assert(0 <= lineno && lineno < view->height);
1257
1258 for (; lineno < view->height; lineno++) {
1259 if (!draw_view_line(view, lineno))
1260 break;
1261 }
1262
1263 redrawwin(view->win);
1264 wrefresh(view->win);
1265 }
1266
1267 static void
1268 redraw_view(struct view *view)
1269 {
1270 wclear(view->win);
1271 redraw_view_from(view, 0);
1272 }
1273
1274
1275 static void
1276 update_view_title(struct view *view)
1277 {
1278 if (view == display[current_view])
1279 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1280 else
1281 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1282
1283 werase(view->title);
1284 wmove(view->title, 0, 0);
1285
1286 if (*view->ref)
1287 wprintw(view->title, "[%s] %s", view->name, view->ref);
1288 else
1289 wprintw(view->title, "[%s]", view->name);
1290
1291 if (view->lines || view->pipe) {
1292 unsigned int view_lines = view->offset + view->height;
1293 unsigned int lines = view->lines
1294 ? MIN(view_lines, view->lines) * 100 / view->lines
1295 : 0;
1296
1297 wprintw(view->title, " - %s %d of %d (%d%%)",
1298 view->ops->type,
1299 view->lineno + 1,
1300 view->lines,
1301 lines);
1302 }
1303
1304 if (view->pipe) {
1305 time_t secs = time(NULL) - view->start_time;
1306
1307 /* Three git seconds are a long time ... */
1308 if (secs > 2)
1309 wprintw(view->title, " %lds", secs);
1310 }
1311
1312 wmove(view->title, 0, view->width - 1);
1313 wrefresh(view->title);
1314 }
1315
1316 static void
1317 resize_display(void)
1318 {
1319 int offset, i;
1320 struct view *base = display[0];
1321 struct view *view = display[1] ? display[1] : display[0];
1322
1323 /* Setup window dimensions */
1324
1325 getmaxyx(stdscr, base->height, base->width);
1326
1327 /* Make room for the status window. */
1328 base->height -= 1;
1329
1330 if (view != base) {
1331 /* Horizontal split. */
1332 view->width = base->width;
1333 view->height = SCALE_SPLIT_VIEW(base->height);
1334 base->height -= view->height;
1335
1336 /* Make room for the title bar. */
1337 view->height -= 1;
1338 }
1339
1340 /* Make room for the title bar. */
1341 base->height -= 1;
1342
1343 offset = 0;
1344
1345 foreach_view (view, i) {
1346 if (!view->win) {
1347 view->win = newwin(view->height, 0, offset, 0);
1348 if (!view->win)
1349 die("Failed to create %s view", view->name);
1350
1351 scrollok(view->win, TRUE);
1352
1353 view->title = newwin(1, 0, offset + view->height, 0);
1354 if (!view->title)
1355 die("Failed to create title window");
1356
1357 } else {
1358 wresize(view->win, view->height, view->width);
1359 mvwin(view->win, offset, 0);
1360 mvwin(view->title, offset + view->height, 0);
1361 }
1362
1363 offset += view->height + 1;
1364 }
1365 }
1366
1367 static void
1368 redraw_display(void)
1369 {
1370 struct view *view;
1371 int i;
1372
1373 foreach_view (view, i) {
1374 redraw_view(view);
1375 update_view_title(view);
1376 }
1377 }
1378
1379 static void
1380 update_display_cursor(void)
1381 {
1382 struct view *view = display[current_view];
1383
1384 /* Move the cursor to the right-most column of the cursor line.
1385 *
1386 * XXX: This could turn out to be a bit expensive, but it ensures that
1387 * the cursor does not jump around. */
1388 if (view->lines) {
1389 wmove(view->win, view->lineno - view->offset, view->width - 1);
1390 wrefresh(view->win);
1391 }
1392 }
1393
1394 /*
1395 * Navigation
1396 */
1397
1398 /* Scrolling backend */
1399 static void
1400 do_scroll_view(struct view *view, int lines, bool redraw)
1401 {
1402 /* The rendering expects the new offset. */
1403 view->offset += lines;
1404
1405 assert(0 <= view->offset && view->offset < view->lines);
1406 assert(lines);
1407
1408 /* Redraw the whole screen if scrolling is pointless. */
1409 if (view->height < ABS(lines)) {
1410 redraw_view(view);
1411
1412 } else {
1413 int line = lines > 0 ? view->height - lines : 0;
1414 int end = line + ABS(lines);
1415
1416 wscrl(view->win, lines);
1417
1418 for (; line < end; line++) {
1419 if (!draw_view_line(view, line))
1420 break;
1421 }
1422 }
1423
1424 /* Move current line into the view. */
1425 if (view->lineno < view->offset) {
1426 view->lineno = view->offset;
1427 draw_view_line(view, 0);
1428
1429 } else if (view->lineno >= view->offset + view->height) {
1430 if (view->lineno == view->offset + view->height) {
1431 /* Clear the hidden line so it doesn't show if the view
1432 * is scrolled up. */
1433 wmove(view->win, view->height, 0);
1434 wclrtoeol(view->win);
1435 }
1436 view->lineno = view->offset + view->height - 1;
1437 draw_view_line(view, view->lineno - view->offset);
1438 }
1439
1440 assert(view->offset <= view->lineno && view->lineno < view->lines);
1441
1442 if (!redraw)
1443 return;
1444
1445 redrawwin(view->win);
1446 wrefresh(view->win);
1447 report("");
1448 }
1449
1450 /* Scroll frontend */
1451 static void
1452 scroll_view(struct view *view, enum request request)
1453 {
1454 int lines = 1;
1455
1456 switch (request) {
1457 case REQ_SCROLL_PAGE_DOWN:
1458 lines = view->height;
1459 case REQ_SCROLL_LINE_DOWN:
1460 if (view->offset + lines > view->lines)
1461 lines = view->lines - view->offset;
1462
1463 if (lines == 0 || view->offset + view->height >= view->lines) {
1464 report("Cannot scroll beyond the last line");
1465 return;
1466 }
1467 break;
1468
1469 case REQ_SCROLL_PAGE_UP:
1470 lines = view->height;
1471 case REQ_SCROLL_LINE_UP:
1472 if (lines > view->offset)
1473 lines = view->offset;
1474
1475 if (lines == 0) {
1476 report("Cannot scroll beyond the first line");
1477 return;
1478 }
1479
1480 lines = -lines;
1481 break;
1482
1483 default:
1484 die("request %d not handled in switch", request);
1485 }
1486
1487 do_scroll_view(view, lines, TRUE);
1488 }
1489
1490 /* Cursor moving */
1491 static void
1492 move_view(struct view *view, enum request request, bool redraw)
1493 {
1494 int steps;
1495
1496 switch (request) {
1497 case REQ_MOVE_FIRST_LINE:
1498 steps = -view->lineno;
1499 break;
1500
1501 case REQ_MOVE_LAST_LINE:
1502 steps = view->lines - view->lineno - 1;
1503 break;
1504
1505 case REQ_MOVE_PAGE_UP:
1506 steps = view->height > view->lineno
1507 ? -view->lineno : -view->height;
1508 break;
1509
1510 case REQ_MOVE_PAGE_DOWN:
1511 steps = view->lineno + view->height >= view->lines
1512 ? view->lines - view->lineno - 1 : view->height;
1513 break;
1514
1515 case REQ_MOVE_UP:
1516 steps = -1;
1517 break;
1518
1519 case REQ_MOVE_DOWN:
1520 steps = 1;
1521 break;
1522
1523 default:
1524 die("request %d not handled in switch", request);
1525 }
1526
1527 if (steps <= 0 && view->lineno == 0) {
1528 report("Cannot move beyond the first line");
1529 return;
1530
1531 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1532 report("Cannot move beyond the last line");
1533 return;
1534 }
1535
1536 /* Move the current line */
1537 view->lineno += steps;
1538 assert(0 <= view->lineno && view->lineno < view->lines);
1539
1540 /* Repaint the old "current" line if we be scrolling */
1541 if (ABS(steps) < view->height) {
1542 int prev_lineno = view->lineno - steps - view->offset;
1543
1544 wmove(view->win, prev_lineno, 0);
1545 wclrtoeol(view->win);
1546 draw_view_line(view, prev_lineno);
1547 }
1548
1549 /* Check whether the view needs to be scrolled */
1550 if (view->lineno < view->offset ||
1551 view->lineno >= view->offset + view->height) {
1552 if (steps < 0 && -steps > view->offset) {
1553 steps = -view->offset;
1554
1555 } else if (steps > 0) {
1556 if (view->lineno == view->lines - 1 &&
1557 view->lines > view->height) {
1558 steps = view->lines - view->offset - 1;
1559 if (steps >= view->height)
1560 steps -= view->height - 1;
1561 }
1562 }
1563
1564 do_scroll_view(view, steps, redraw);
1565 return;
1566 }
1567
1568 /* Draw the current line */
1569 draw_view_line(view, view->lineno - view->offset);
1570
1571 if (!redraw)
1572 return;
1573
1574 redrawwin(view->win);
1575 wrefresh(view->win);
1576 report("");
1577 }
1578
1579
1580 /*
1581 * Searching
1582 */
1583
1584 static void search_view(struct view *view, enum request request, const char *search);
1585
1586 static bool
1587 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1588 {
1589 if (!view->ops->grep(view, line))
1590 return FALSE;
1591
1592 if (lineno - view->offset >= view->height) {
1593 view->offset = lineno;
1594 view->lineno = lineno;
1595 redraw_view(view);
1596
1597 } else {
1598 unsigned long old_lineno = view->lineno - view->offset;
1599
1600 view->lineno = lineno;
1601
1602 wmove(view->win, old_lineno, 0);
1603 wclrtoeol(view->win);
1604 draw_view_line(view, old_lineno);
1605
1606 draw_view_line(view, view->lineno - view->offset);
1607 redrawwin(view->win);
1608 wrefresh(view->win);
1609 }
1610
1611 report("Line %ld matches '%s'", lineno + 1, view->grep);
1612 return TRUE;
1613 }
1614
1615 static void
1616 find_next(struct view *view, enum request request)
1617 {
1618 unsigned long lineno = view->lineno;
1619 int direction;
1620
1621 if (!*view->grep) {
1622 if (!*opt_search)
1623 report("No previous search");
1624 else
1625 search_view(view, request, opt_search);
1626 return;
1627 }
1628
1629 switch (request) {
1630 case REQ_SEARCH:
1631 case REQ_FIND_NEXT:
1632 direction = 1;
1633 break;
1634
1635 case REQ_SEARCH_BACK:
1636 case REQ_FIND_PREV:
1637 direction = -1;
1638 break;
1639
1640 default:
1641 return;
1642 }
1643
1644 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1645 lineno += direction;
1646
1647 /* Note, lineno is unsigned long so will wrap around in which case it
1648 * will become bigger than view->lines. */
1649 for (; lineno < view->lines; lineno += direction) {
1650 struct line *line = &view->line[lineno];
1651
1652 if (find_next_line(view, lineno, line))
1653 return;
1654 }
1655
1656 report("No match found for '%s'", view->grep);
1657 }
1658
1659 static void
1660 search_view(struct view *view, enum request request, const char *search)
1661 {
1662 int regex_err;
1663
1664 if (*view->grep) {
1665 regfree(&view->regex);
1666 *view->grep = 0;
1667 }
1668
1669 regex_err = regcomp(&view->regex, search, REG_EXTENDED);
1670 if (regex_err != 0) {
1671 char buf[SIZEOF_STR] = "unknown error";
1672
1673 regerror(regex_err, &view->regex, buf, sizeof(buf));
1674 report("Search failed: %s", buf);;
1675 return;
1676 }
1677
1678 string_copy(view->grep, search);
1679
1680 find_next(view, request);
1681 }
1682
1683 /*
1684 * Incremental updating
1685 */
1686
1687 static void
1688 end_update(struct view *view)
1689 {
1690 if (!view->pipe)
1691 return;
1692 set_nonblocking_input(FALSE);
1693 if (view->pipe == stdin)
1694 fclose(view->pipe);
1695 else
1696 pclose(view->pipe);
1697 view->pipe = NULL;
1698 }
1699
1700 static bool
1701 begin_update(struct view *view)
1702 {
1703 const char *id = view->id;
1704
1705 if (view->pipe)
1706 end_update(view);
1707
1708 if (opt_cmd[0]) {
1709 string_copy(view->cmd, opt_cmd);
1710 opt_cmd[0] = 0;
1711 /* When running random commands, the view ref could have become
1712 * invalid so clear it. */
1713 view->ref[0] = 0;
1714
1715 } else if (view == VIEW(REQ_VIEW_TREE)) {
1716 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1717
1718 if (strcmp(view->vid, view->id))
1719 opt_path[0] = 0;
1720
1721 if (snprintf(view->cmd, sizeof(view->cmd), format, id, opt_path)
1722 >= sizeof(view->cmd))
1723 return FALSE;
1724
1725 } else {
1726 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1727
1728 if (!string_format(view->cmd, format, id, id, id, id, id))
1729 return FALSE;
1730 }
1731
1732 /* Special case for the pager view. */
1733 if (opt_pipe) {
1734 view->pipe = opt_pipe;
1735 opt_pipe = NULL;
1736 } else {
1737 view->pipe = popen(view->cmd, "r");
1738 }
1739
1740 if (!view->pipe)
1741 return FALSE;
1742
1743 set_nonblocking_input(TRUE);
1744
1745 view->offset = 0;
1746 view->lines = 0;
1747 view->lineno = 0;
1748 string_copy(view->vid, id);
1749
1750 if (view->line) {
1751 int i;
1752
1753 for (i = 0; i < view->lines; i++)
1754 if (view->line[i].data)
1755 free(view->line[i].data);
1756
1757 free(view->line);
1758 view->line = NULL;
1759 }
1760
1761 view->start_time = time(NULL);
1762
1763 return TRUE;
1764 }
1765
1766 static struct line *
1767 realloc_lines(struct view *view, size_t line_size)
1768 {
1769 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1770
1771 if (!tmp)
1772 return NULL;
1773
1774 view->line = tmp;
1775 view->line_size = line_size;
1776 return view->line;
1777 }
1778
1779 static bool
1780 update_view(struct view *view)
1781 {
1782 char in_buffer[BUFSIZ];
1783 char out_buffer[BUFSIZ * 2];
1784 char *line;
1785 /* The number of lines to read. If too low it will cause too much
1786 * redrawing (and possible flickering), if too high responsiveness
1787 * will suffer. */
1788 unsigned long lines = view->height;
1789 int redraw_from = -1;
1790
1791 if (!view->pipe)
1792 return TRUE;
1793
1794 /* Only redraw if lines are visible. */
1795 if (view->offset + view->height >= view->lines)
1796 redraw_from = view->lines - view->offset;
1797
1798 if (!realloc_lines(view, view->lines + lines))
1799 goto alloc_error;
1800
1801 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1802 size_t linelen = strlen(line);
1803
1804 if (linelen)
1805 line[linelen - 1] = 0;
1806
1807 if (opt_iconv != ICONV_NONE) {
1808 char *inbuf = line;
1809 size_t inlen = linelen;
1810
1811 char *outbuf = out_buffer;
1812 size_t outlen = sizeof(out_buffer);
1813
1814 size_t ret;
1815
1816 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1817 if (ret != (size_t) -1) {
1818 line = out_buffer;
1819 linelen = strlen(out_buffer);
1820 }
1821 }
1822
1823 if (!view->ops->read(view, line))
1824 goto alloc_error;
1825
1826 if (lines-- == 1)
1827 break;
1828 }
1829
1830 {
1831 int digits;
1832
1833 lines = view->lines;
1834 for (digits = 0; lines; digits++)
1835 lines /= 10;
1836
1837 /* Keep the displayed view in sync with line number scaling. */
1838 if (digits != view->digits) {
1839 view->digits = digits;
1840 redraw_from = 0;
1841 }
1842 }
1843
1844 if (view == VIEW(REQ_VIEW_TREE)) {
1845 /* Clear the view and redraw everything since the tree sorting
1846 * might have rearranged things. */
1847 redraw_view(view);
1848
1849 } else if (redraw_from >= 0) {
1850 /* If this is an incremental update, redraw the previous line
1851 * since for commits some members could have changed when
1852 * loading the main view. */
1853 if (redraw_from > 0)
1854 redraw_from--;
1855
1856 /* Incrementally draw avoids flickering. */
1857 redraw_view_from(view, redraw_from);
1858 }
1859
1860 /* Update the title _after_ the redraw so that if the redraw picks up a
1861 * commit reference in view->ref it'll be available here. */
1862 update_view_title(view);
1863
1864 if (ferror(view->pipe)) {
1865 report("Failed to read: %s", strerror(errno));
1866 goto end;
1867
1868 } else if (feof(view->pipe)) {
1869 report("");
1870 goto end;
1871 }
1872
1873 return TRUE;
1874
1875 alloc_error:
1876 report("Allocation failure");
1877
1878 end:
1879 end_update(view);
1880 return FALSE;
1881 }
1882
1883
1884 /*
1885 * View opening
1886 */
1887
1888 static void open_help_view(struct view *view)
1889 {
1890 char buf[BUFSIZ];
1891 int lines = ARRAY_SIZE(req_info) + 2;
1892 int i;
1893
1894 if (view->lines > 0)
1895 return;
1896
1897 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1898 if (!req_info[i].request)
1899 lines++;
1900
1901 view->line = calloc(lines, sizeof(*view->line));
1902 if (!view->line) {
1903 report("Allocation failure");
1904 return;
1905 }
1906
1907 view->ops->read(view, "Quick reference for tig keybindings:");
1908
1909 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1910 char *key;
1911
1912 if (!req_info[i].request) {
1913 view->ops->read(view, "");
1914 view->ops->read(view, req_info[i].help);
1915 continue;
1916 }
1917
1918 key = get_key(req_info[i].request);
1919 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1920 continue;
1921
1922 view->ops->read(view, buf);
1923 }
1924 }
1925
1926 enum open_flags {
1927 OPEN_DEFAULT = 0, /* Use default view switching. */
1928 OPEN_SPLIT = 1, /* Split current view. */
1929 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1930 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1931 };
1932
1933 static void
1934 open_view(struct view *prev, enum request request, enum open_flags flags)
1935 {
1936 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1937 bool split = !!(flags & OPEN_SPLIT);
1938 bool reload = !!(flags & OPEN_RELOAD);
1939 struct view *view = VIEW(request);
1940 int nviews = displayed_views();
1941 struct view *base_view = display[0];
1942
1943 if (view == prev && nviews == 1 && !reload) {
1944 report("Already in %s view", view->name);
1945 return;
1946 }
1947
1948 if (view == VIEW(REQ_VIEW_HELP)) {
1949 open_help_view(view);
1950
1951 } else if ((reload || strcmp(view->vid, view->id)) &&
1952 !begin_update(view)) {
1953 report("Failed to load %s view", view->name);
1954 return;
1955 }
1956
1957 if (split) {
1958 display[1] = view;
1959 if (!backgrounded)
1960 current_view = 1;
1961 } else {
1962 /* Maximize the current view. */
1963 memset(display, 0, sizeof(display));
1964 current_view = 0;
1965 display[current_view] = view;
1966 }
1967
1968 /* Resize the view when switching between split- and full-screen,
1969 * or when switching between two different full-screen views. */
1970 if (nviews != displayed_views() ||
1971 (nviews == 1 && base_view != display[0]))
1972 resize_display();
1973
1974 if (split && prev->lineno - prev->offset >= prev->height) {
1975 /* Take the title line into account. */
1976 int lines = prev->lineno - prev->offset - prev->height + 1;
1977
1978 /* Scroll the view that was split if the current line is
1979 * outside the new limited view. */
1980 do_scroll_view(prev, lines, TRUE);
1981 }
1982
1983 if (prev && view != prev) {
1984 if (split && !backgrounded) {
1985 /* "Blur" the previous view. */
1986 update_view_title(prev);
1987 }
1988
1989 view->parent = prev;
1990 }
1991
1992 if (view->pipe && view->lines == 0) {
1993 /* Clear the old view and let the incremental updating refill
1994 * the screen. */
1995 wclear(view->win);
1996 report("");
1997 } else {
1998 redraw_view(view);
1999 report("");
2000 }
2001
2002 /* If the view is backgrounded the above calls to report()
2003 * won't redraw the view title. */
2004 if (backgrounded)
2005 update_view_title(view);
2006 }
2007
2008
2009 /*
2010 * User request switch noodle
2011 */
2012
2013 static int
2014 view_driver(struct view *view, enum request request)
2015 {
2016 int i;
2017
2018 switch (request) {
2019 case REQ_MOVE_UP:
2020 case REQ_MOVE_DOWN:
2021 case REQ_MOVE_PAGE_UP:
2022 case REQ_MOVE_PAGE_DOWN:
2023 case REQ_MOVE_FIRST_LINE:
2024 case REQ_MOVE_LAST_LINE:
2025 move_view(view, request, TRUE);
2026 break;
2027
2028 case REQ_SCROLL_LINE_DOWN:
2029 case REQ_SCROLL_LINE_UP:
2030 case REQ_SCROLL_PAGE_DOWN:
2031 case REQ_SCROLL_PAGE_UP:
2032 scroll_view(view, request);
2033 break;
2034
2035 case REQ_VIEW_BLOB:
2036 if (!ref_blob[0]) {
2037 report("No file chosen, press 't' to open tree view");
2038 break;
2039 }
2040 /* Fall-through */
2041 case REQ_VIEW_MAIN:
2042 case REQ_VIEW_DIFF:
2043 case REQ_VIEW_LOG:
2044 case REQ_VIEW_TREE:
2045 case REQ_VIEW_HELP:
2046 case REQ_VIEW_PAGER:
2047 open_view(view, request, OPEN_DEFAULT);
2048 break;
2049
2050 case REQ_NEXT:
2051 case REQ_PREVIOUS:
2052 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2053
2054 if ((view == VIEW(REQ_VIEW_DIFF) &&
2055 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2056 (view == VIEW(REQ_VIEW_BLOB) &&
2057 view->parent == VIEW(REQ_VIEW_TREE))) {
2058 bool redraw = display[1] == view;
2059
2060 view = view->parent;
2061 move_view(view, request, redraw);
2062 if (redraw)
2063 update_view_title(view);
2064 } else {
2065 move_view(view, request, TRUE);
2066 break;
2067 }
2068 /* Fall-through */
2069
2070 case REQ_ENTER:
2071 if (!view->lines) {
2072 report("Nothing to enter");
2073 break;
2074 }
2075 return view->ops->enter(view, &view->line[view->lineno]);
2076
2077 case REQ_VIEW_NEXT:
2078 {
2079 int nviews = displayed_views();
2080 int next_view = (current_view + 1) % nviews;
2081
2082 if (next_view == current_view) {
2083 report("Only one view is displayed");
2084 break;
2085 }
2086
2087 current_view = next_view;
2088 /* Blur out the title of the previous view. */
2089 update_view_title(view);
2090 report("");
2091 break;
2092 }
2093 case REQ_TOGGLE_LINENO:
2094 opt_line_number = !opt_line_number;
2095 redraw_display();
2096 break;
2097
2098 case REQ_TOGGLE_REV_GRAPH:
2099 opt_rev_graph = !opt_rev_graph;
2100 redraw_display();
2101 break;
2102
2103 case REQ_PROMPT:
2104 /* Always reload^Wrerun commands from the prompt. */
2105 open_view(view, opt_request, OPEN_RELOAD);
2106 break;
2107
2108 case REQ_SEARCH:
2109 case REQ_SEARCH_BACK:
2110 search_view(view, request, opt_search);
2111 break;
2112
2113 case REQ_FIND_NEXT:
2114 case REQ_FIND_PREV:
2115 find_next(view, request);
2116 break;
2117
2118 case REQ_STOP_LOADING:
2119 for (i = 0; i < ARRAY_SIZE(views); i++) {
2120 view = &views[i];
2121 if (view->pipe)
2122 report("Stopped loading the %s view", view->name),
2123 end_update(view);
2124 }
2125 break;
2126
2127 case REQ_SHOW_VERSION:
2128 report("%s (built %s)", VERSION, __DATE__);
2129 return TRUE;
2130
2131 case REQ_SCREEN_RESIZE:
2132 resize_display();
2133 /* Fall-through */
2134 case REQ_SCREEN_REDRAW:
2135 redraw_display();
2136 break;
2137
2138 case REQ_NONE:
2139 doupdate();
2140 return TRUE;
2141
2142 case REQ_VIEW_CLOSE:
2143 /* XXX: Mark closed views by letting view->parent point to the
2144 * view itself. Parents to closed view should never be
2145 * followed. */
2146 if (view->parent &&
2147 view->parent->parent != view->parent) {
2148 memset(display, 0, sizeof(display));
2149 current_view = 0;
2150 display[current_view] = view->parent;
2151 view->parent = view;
2152 resize_display();
2153 redraw_display();
2154 break;
2155 }
2156 /* Fall-through */
2157 case REQ_QUIT:
2158 return FALSE;
2159
2160 default:
2161 /* An unknown key will show most commonly used commands. */
2162 report("Unknown key, press 'h' for help");
2163 return TRUE;
2164 }
2165
2166 return TRUE;
2167 }
2168
2169
2170 /*
2171 * Pager backend
2172 */
2173
2174 static bool
2175 pager_draw(struct view *view, struct line *line, unsigned int lineno)
2176 {
2177 char *text = line->data;
2178 enum line_type type = line->type;
2179 int textlen = strlen(text);
2180 int attr;
2181
2182 wmove(view->win, lineno, 0);
2183
2184 if (view->offset + lineno == view->lineno) {
2185 if (type == LINE_COMMIT) {
2186 string_copy(view->ref, text + 7);
2187 string_copy(ref_commit, view->ref);
2188
2189 } else if (type == LINE_TREE_DIR || type == LINE_TREE_FILE) {
2190 strncpy(view->ref, text + STRING_SIZE("100644 blob "), 41);
2191 view->ref[40] = 0;
2192 string_copy(ref_blob, view->ref);
2193 }
2194
2195 type = LINE_CURSOR;
2196 wchgat(view->win, -1, 0, type, NULL);
2197 }
2198
2199 attr = get_line_attr(type);
2200 wattrset(view->win, attr);
2201
2202 if (opt_line_number || opt_tab_size < TABSIZE) {
2203 static char spaces[] = " ";
2204 int col_offset = 0, col = 0;
2205
2206 if (opt_line_number) {
2207 unsigned long real_lineno = view->offset + lineno + 1;
2208
2209 if (real_lineno == 1 ||
2210 (real_lineno % opt_num_interval) == 0) {
2211 wprintw(view->win, "%.*d", view->digits, real_lineno);
2212
2213 } else {
2214 waddnstr(view->win, spaces,
2215 MIN(view->digits, STRING_SIZE(spaces)));
2216 }
2217 waddstr(view->win, ": ");
2218 col_offset = view->digits + 2;
2219 }
2220
2221 while (text && col_offset + col < view->width) {
2222 int cols_max = view->width - col_offset - col;
2223 char *pos = text;
2224 int cols;
2225
2226 if (*text == '\t') {
2227 text++;
2228 assert(sizeof(spaces) > TABSIZE);
2229 pos = spaces;
2230 cols = opt_tab_size - (col % opt_tab_size);
2231
2232 } else {
2233 text = strchr(text, '\t');
2234 cols = line ? text - pos : strlen(pos);
2235 }
2236
2237 waddnstr(view->win, pos, MIN(cols, cols_max));
2238 col += cols;
2239 }
2240
2241 } else {
2242 int col = 0, pos = 0;
2243
2244 for (; pos < textlen && col < view->width; pos++, col++)
2245 if (text[pos] == '\t')
2246 col += TABSIZE - (col % TABSIZE) - 1;
2247
2248 waddnstr(view->win, text, pos);
2249 }
2250
2251 return TRUE;
2252 }
2253
2254 static bool
2255 add_describe_ref(char *buf, int *bufpos, char *commit_id, const char *sep)
2256 {
2257 char refbuf[SIZEOF_STR];
2258 char *ref = NULL;
2259 FILE *pipe;
2260
2261 if (!string_format(refbuf, "git describe %s", commit_id))
2262 return TRUE;
2263
2264 pipe = popen(refbuf, "r");
2265 if (!pipe)
2266 return TRUE;
2267
2268 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2269 ref = chomp_string(ref);
2270 pclose(pipe);
2271
2272 if (!ref || !*ref)
2273 return TRUE;
2274
2275 /* This is the only fatal call, since it can "corrupt" the buffer. */
2276 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2277 return FALSE;
2278
2279 return TRUE;
2280 }
2281
2282 static void
2283 add_pager_refs(struct view *view, struct line *line)
2284 {
2285 char buf[SIZEOF_STR];
2286 char *commit_id = line->data + STRING_SIZE("commit ");
2287 struct ref **refs;
2288 int bufpos = 0, refpos = 0;
2289 const char *sep = "Refs: ";
2290 bool is_tag = FALSE;
2291
2292 assert(line->type == LINE_COMMIT);
2293
2294 refs = get_refs(commit_id);
2295 if (!refs) {
2296 if (view == VIEW(REQ_VIEW_DIFF))
2297 goto try_add_describe_ref;
2298 return;
2299 }
2300
2301 do {
2302 struct ref *ref = refs[refpos];
2303 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2304
2305 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2306 return;
2307 sep = ", ";
2308 if (ref->tag)
2309 is_tag = TRUE;
2310 } while (refs[refpos++]->next);
2311
2312 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2313 try_add_describe_ref:
2314 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2315 return;
2316 }
2317
2318 if (!realloc_lines(view, view->line_size + 1))
2319 return;
2320
2321 line = &view->line[view->lines];
2322 line->data = strdup(buf);
2323 if (!line->data)
2324 return;
2325
2326 line->type = LINE_PP_REFS;
2327 view->lines++;
2328 }
2329
2330 static bool
2331 pager_read(struct view *view, char *data)
2332 {
2333 struct line *line = &view->line[view->lines];
2334
2335 line->data = strdup(data);
2336 if (!line->data)
2337 return FALSE;
2338
2339 line->type = get_line_type(line->data);
2340 view->lines++;
2341
2342 if (line->type == LINE_COMMIT &&
2343 (view == VIEW(REQ_VIEW_DIFF) ||
2344 view == VIEW(REQ_VIEW_LOG)))
2345 add_pager_refs(view, line);
2346
2347 return TRUE;
2348 }
2349
2350 static bool
2351 pager_enter(struct view *view, struct line *line)
2352 {
2353 int split = 0;
2354
2355 if (line->type == LINE_COMMIT &&
2356 (view == VIEW(REQ_VIEW_LOG) ||
2357 view == VIEW(REQ_VIEW_PAGER))) {
2358 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2359 split = 1;
2360 }
2361
2362 /* Always scroll the view even if it was split. That way
2363 * you can use Enter to scroll through the log view and
2364 * split open each commit diff. */
2365 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2366
2367 /* FIXME: A minor workaround. Scrolling the view will call report("")
2368 * but if we are scrolling a non-current view this won't properly
2369 * update the view title. */
2370 if (split)
2371 update_view_title(view);
2372
2373 return TRUE;
2374 }
2375
2376 static bool
2377 pager_grep(struct view *view, struct line *line)
2378 {
2379 regmatch_t pmatch;
2380 char *text = line->data;
2381
2382 if (!*text)
2383 return FALSE;
2384
2385 if (regexec(&view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2386 return FALSE;
2387
2388 return TRUE;
2389 }
2390
2391 static struct view_ops pager_ops = {
2392 "line",
2393 pager_draw,
2394 pager_read,
2395 pager_enter,
2396 pager_grep,
2397 };
2398
2399
2400 /*
2401 * Tree backend
2402 */
2403
2404 /* Parse output from git ls-tree:
2405 *
2406 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2407 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2408 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2409 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2410 */
2411
2412 #define SIZEOF_TREE_ATTR \
2413 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2414
2415 #define TREE_UP_FORMAT "040000 tree %s\t.."
2416
2417 static int
2418 tree_compare_entry(enum line_type type1, char *name1,
2419 enum line_type type2, char *name2)
2420 {
2421 if (type1 != type2) {
2422 if (type1 == LINE_TREE_DIR)
2423 return -1;
2424 return 1;
2425 }
2426
2427 return strcmp(name1, name2);
2428 }
2429
2430 static bool
2431 tree_read(struct view *view, char *text)
2432 {
2433 size_t textlen = strlen(text);
2434 char buf[SIZEOF_STR];
2435 unsigned long pos;
2436 enum line_type type;
2437
2438 if (textlen <= SIZEOF_TREE_ATTR)
2439 return FALSE;
2440
2441 type = text[STRING_SIZE("100644 ")] == 't'
2442 ? LINE_TREE_DIR : LINE_TREE_FILE;
2443
2444 /* The first time around ... */
2445 if (!view->lines) {
2446 /* Add path info line */
2447 if (snprintf(buf, sizeof(buf), "Directory path /%s", opt_path) < sizeof(buf) &&
2448 realloc_lines(view, view->line_size + 1) &&
2449 pager_read(view, buf))
2450 view->line[view->lines - 1].type = LINE_DEFAULT;
2451 else
2452 return FALSE;
2453
2454 /* Insert "link" to parent directory. */
2455 if (*opt_path &&
2456 snprintf(buf, sizeof(buf), TREE_UP_FORMAT, view->ref) < sizeof(buf) &&
2457 realloc_lines(view, view->line_size + 1) &&
2458 pager_read(view, buf))
2459 view->line[view->lines - 1].type = LINE_TREE_DIR;
2460 else if (*opt_path)
2461 return FALSE;
2462 }
2463
2464 /* Strip the path part ... */
2465 if (*opt_path) {
2466 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2467 size_t striplen = strlen(opt_path);
2468 char *path = text + SIZEOF_TREE_ATTR;
2469
2470 if (pathlen > striplen)
2471 memmove(path, path + striplen,
2472 pathlen - striplen + 1);
2473 }
2474
2475 /* Skip "Directory ..." and ".." line. */
2476 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2477 struct line *line = &view->line[pos];
2478 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2479 char *path2 = text + SIZEOF_TREE_ATTR;
2480 int cmp = tree_compare_entry(line->type, path1, type, path2);
2481
2482 if (cmp <= 0)
2483 continue;
2484
2485 text = strdup(text);
2486 if (!text)
2487 return FALSE;
2488
2489 if (view->lines > pos)
2490 memmove(&view->line[pos + 1], &view->line[pos],
2491 (view->lines - pos) * sizeof(*line));
2492
2493 line = &view->line[pos];
2494 line->data = text;
2495 line->type = type;
2496 view->lines++;
2497 return TRUE;
2498 }
2499
2500 if (!pager_read(view, text))
2501 return FALSE;
2502
2503 view->line[view->lines - 1].type = type;
2504 return TRUE;
2505 }
2506
2507 static bool
2508 tree_enter(struct view *view, struct line *line)
2509 {
2510 enum open_flags flags = OPEN_DEFAULT;
2511 char *data = line->data;
2512 enum request request;
2513
2514 switch (line->type) {
2515 case LINE_TREE_DIR:
2516 /* Depending on whether it is a subdir or parent (updir?) link
2517 * mangle the path buffer. */
2518 if (line == &view->line[1] && *opt_path) {
2519 size_t path_len = strlen(opt_path);
2520 char *dirsep = opt_path + path_len - 1;
2521
2522 while (dirsep > opt_path && dirsep[-1] != '/')
2523 dirsep--;
2524
2525 dirsep[0] = 0;
2526
2527 } else {
2528 int pathlen = strlen(opt_path);
2529 char *basename = data + SIZEOF_TREE_ATTR;
2530
2531 string_format_from(opt_path, &pathlen, "%s/", basename);
2532 }
2533
2534 /* Trees and subtrees share the same ID, so they are not not
2535 * unique like blobs. */
2536 flags |= OPEN_RELOAD;
2537 request = REQ_VIEW_TREE;
2538 break;
2539
2540 case LINE_TREE_FILE:
2541 /* This causes the blob view to become split, and not having it
2542 * in the tree dir case will make the blob view automatically
2543 * disappear when moving to a different directory. */
2544 flags |= OPEN_SPLIT;
2545 request = REQ_VIEW_BLOB;
2546 break;
2547
2548 default:
2549 return TRUE;
2550 }
2551
2552 open_view(view, request, flags);
2553
2554 if (!VIEW(request)->pipe)
2555 return TRUE;
2556
2557 /* For tree views insert the path to the parent as the first line. */
2558 if (request == REQ_VIEW_BLOB) {
2559 /* Mirror what is showed in the title bar. */
2560 string_ncopy(ref_blob, data + STRING_SIZE("100644 blob "), 40);
2561 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2562 return TRUE;
2563 }
2564
2565 return TRUE;
2566 }
2567
2568 static struct view_ops tree_ops = {
2569 "file",
2570 pager_draw,
2571 tree_read,
2572 tree_enter,
2573 pager_grep,
2574 };
2575
2576 static bool
2577 blob_read(struct view *view, char *line)
2578 {
2579 bool state = pager_read(view, line);
2580
2581 if (state == TRUE)
2582 view->line[view->lines - 1].type = LINE_DEFAULT;
2583
2584 return state;
2585 }
2586
2587 static struct view_ops blob_ops = {
2588 "line",
2589 pager_draw,
2590 blob_read,
2591 pager_enter,
2592 pager_grep,
2593 };
2594
2595
2596 /*
2597 * Main view backend
2598 */
2599
2600 struct commit {
2601 char id[41]; /* SHA1 ID. */
2602 char title[75]; /* First line of the commit message. */
2603 char author[75]; /* Author of the commit. */
2604 struct tm time; /* Date from the author ident. */
2605 struct ref **refs; /* Repository references. */
2606 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2607 size_t graph_size; /* The width of the graph array. */
2608 };
2609
2610 static bool
2611 main_draw(struct view *view, struct line *line, unsigned int lineno)
2612 {
2613 char buf[DATE_COLS + 1];
2614 struct commit *commit = line->data;
2615 enum line_type type;
2616 int col = 0;
2617 size_t timelen;
2618 size_t authorlen;
2619 int trimmed = 1;
2620
2621 if (!*commit->author)
2622 return FALSE;
2623
2624 wmove(view->win, lineno, col);
2625
2626 if (view->offset + lineno == view->lineno) {
2627 string_copy(view->ref, commit->id);
2628 string_copy(ref_commit, view->ref);
2629 type = LINE_CURSOR;
2630 wattrset(view->win, get_line_attr(type));
2631 wchgat(view->win, -1, 0, type, NULL);
2632
2633 } else {
2634 type = LINE_MAIN_COMMIT;
2635 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2636 }
2637
2638 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2639 waddnstr(view->win, buf, timelen);
2640 waddstr(view->win, " ");
2641
2642 col += DATE_COLS;
2643 wmove(view->win, lineno, col);
2644 if (type != LINE_CURSOR)
2645 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2646
2647 if (opt_utf8) {
2648 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2649 } else {
2650 authorlen = strlen(commit->author);
2651 if (authorlen > AUTHOR_COLS - 2) {
2652 authorlen = AUTHOR_COLS - 2;
2653 trimmed = 1;
2654 }
2655 }
2656
2657 if (trimmed) {
2658 waddnstr(view->win, commit->author, authorlen);
2659 if (type != LINE_CURSOR)
2660 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2661 waddch(view->win, '~');
2662 } else {
2663 waddstr(view->win, commit->author);
2664 }
2665
2666 col += AUTHOR_COLS;
2667 if (type != LINE_CURSOR)
2668 wattrset(view->win, A_NORMAL);
2669
2670 if (opt_rev_graph && commit->graph_size) {
2671 size_t i;
2672
2673 wmove(view->win, lineno, col);
2674 /* Using waddch() instead of waddnstr() ensures that
2675 * they'll be rendered correctly for the cursor line. */
2676 for (i = 0; i < commit->graph_size; i++)
2677 waddch(view->win, commit->graph[i]);
2678
2679 col += commit->graph_size + 1;
2680 }
2681
2682 wmove(view->win, lineno, col);
2683
2684 if (commit->refs) {
2685 size_t i = 0;
2686
2687 do {
2688 if (type == LINE_CURSOR)
2689 ;
2690 else if (commit->refs[i]->tag)
2691 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2692 else
2693 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2694 waddstr(view->win, "[");
2695 waddstr(view->win, commit->refs[i]->name);
2696 waddstr(view->win, "]");
2697 if (type != LINE_CURSOR)
2698 wattrset(view->win, A_NORMAL);
2699 waddstr(view->win, " ");
2700 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2701 } while (commit->refs[i++]->next);
2702 }
2703
2704 if (type != LINE_CURSOR)
2705 wattrset(view->win, get_line_attr(type));
2706
2707 {
2708 int titlelen = strlen(commit->title);
2709
2710 if (col + titlelen > view->width)
2711 titlelen = view->width - col;
2712
2713 waddnstr(view->win, commit->title, titlelen);
2714 }
2715
2716 return TRUE;
2717 }
2718
2719 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2720 static bool
2721 main_read(struct view *view, char *line)
2722 {
2723 enum line_type type = get_line_type(line);
2724 struct commit *commit = view->lines
2725 ? view->line[view->lines - 1].data : NULL;
2726
2727 switch (type) {
2728 case LINE_COMMIT:
2729 commit = calloc(1, sizeof(struct commit));
2730 if (!commit)
2731 return FALSE;
2732
2733 line += STRING_SIZE("commit ");
2734
2735 view->line[view->lines++].data = commit;
2736 string_copy(commit->id, line);
2737 commit->refs = get_refs(commit->id);
2738 commit->graph[commit->graph_size++] = ACS_LTEE;
2739 break;
2740
2741 case LINE_AUTHOR:
2742 {
2743 char *ident = line + STRING_SIZE("author ");
2744 char *end = strchr(ident, '<');
2745
2746 if (!commit)
2747 break;
2748
2749 if (end) {
2750 char *email = end + 1;
2751
2752 for (; end > ident && isspace(end[-1]); end--) ;
2753
2754 if (end == ident && *email) {
2755 ident = email;
2756 end = strchr(ident, '>');
2757 for (; end > ident && isspace(end[-1]); end--) ;
2758 }
2759 *end = 0;
2760 }
2761
2762 /* End is NULL or ident meaning there's no author. */
2763 if (end <= ident)
2764 ident = "Unknown";
2765
2766 string_copy(commit->author, ident);
2767
2768 /* Parse epoch and timezone */
2769 if (end) {
2770 char *secs = strchr(end + 1, '>');
2771 char *zone;
2772 time_t time;
2773
2774 if (!secs || secs[1] != ' ')
2775 break;
2776
2777 secs += 2;
2778 time = (time_t) atol(secs);
2779 zone = strchr(secs, ' ');
2780 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2781 long tz;
2782
2783 zone++;
2784 tz = ('0' - zone[1]) * 60 * 60 * 10;
2785 tz += ('0' - zone[2]) * 60 * 60;
2786 tz += ('0' - zone[3]) * 60;
2787 tz += ('0' - zone[4]) * 60;
2788
2789 if (zone[0] == '-')
2790 tz = -tz;
2791
2792 time -= tz;
2793 }
2794 gmtime_r(&time, &commit->time);
2795 }
2796 break;
2797 }
2798 default:
2799 if (!commit)
2800 break;
2801
2802 /* Fill in the commit title if it has not already been set. */
2803 if (commit->title[0])
2804 break;
2805
2806 /* Require titles to start with a non-space character at the
2807 * offset used by git log. */
2808 /* FIXME: More gracefull handling of titles; append "..." to
2809 * shortened titles, etc. */
2810 if (strncmp(line, " ", 4) ||
2811 isspace(line[4]))
2812 break;
2813
2814 string_copy(commit->title, line + 4);
2815 }
2816
2817 return TRUE;
2818 }
2819
2820 static bool
2821 main_enter(struct view *view, struct line *line)
2822 {
2823 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2824
2825 open_view(view, REQ_VIEW_DIFF, flags);
2826 return TRUE;
2827 }
2828
2829 static bool
2830 main_grep(struct view *view, struct line *line)
2831 {
2832 struct commit *commit = line->data;
2833 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2834 char buf[DATE_COLS + 1];
2835 regmatch_t pmatch;
2836
2837 for (state = S_TITLE; state < S_END; state++) {
2838 char *text;
2839
2840 switch (state) {
2841 case S_TITLE: text = commit->title; break;
2842 case S_AUTHOR: text = commit->author; break;
2843 case S_DATE:
2844 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2845 continue;
2846 text = buf;
2847 break;
2848
2849 default:
2850 return FALSE;
2851 }
2852
2853 if (regexec(&view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
2854 return TRUE;
2855 }
2856
2857 return FALSE;
2858 }
2859
2860 static struct view_ops main_ops = {
2861 "commit",
2862 main_draw,
2863 main_read,
2864 main_enter,
2865 main_grep,
2866 };
2867
2868
2869 /*
2870 * Unicode / UTF-8 handling
2871 *
2872 * NOTE: Much of the following code for dealing with unicode is derived from
2873 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2874 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2875 */
2876
2877 /* I've (over)annotated a lot of code snippets because I am not entirely
2878 * confident that the approach taken by this small UTF-8 interface is correct.
2879 * --jonas */
2880
2881 static inline int
2882 unicode_width(unsigned long c)
2883 {
2884 if (c >= 0x1100 &&
2885 (c <= 0x115f /* Hangul Jamo */
2886 || c == 0x2329
2887 || c == 0x232a
2888 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2889 /* CJK ... Yi */
2890 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2891 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2892 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2893 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2894 || (c >= 0xffe0 && c <= 0xffe6)
2895 || (c >= 0x20000 && c <= 0x2fffd)
2896 || (c >= 0x30000 && c <= 0x3fffd)))
2897 return 2;
2898
2899 return 1;
2900 }
2901
2902 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2903 * Illegal bytes are set one. */
2904 static const unsigned char utf8_bytes[256] = {
2905 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,
2906 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,
2907 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,
2908 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,
2909 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,
2910 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,
2911 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,
2912 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,
2913 };
2914
2915 /* Decode UTF-8 multi-byte representation into a unicode character. */
2916 static inline unsigned long
2917 utf8_to_unicode(const char *string, size_t length)
2918 {
2919 unsigned long unicode;
2920
2921 switch (length) {
2922 case 1:
2923 unicode = string[0];
2924 break;
2925 case 2:
2926 unicode = (string[0] & 0x1f) << 6;
2927 unicode += (string[1] & 0x3f);
2928 break;
2929 case 3:
2930 unicode = (string[0] & 0x0f) << 12;
2931 unicode += ((string[1] & 0x3f) << 6);
2932 unicode += (string[2] & 0x3f);
2933 break;
2934 case 4:
2935 unicode = (string[0] & 0x0f) << 18;
2936 unicode += ((string[1] & 0x3f) << 12);
2937 unicode += ((string[2] & 0x3f) << 6);
2938 unicode += (string[3] & 0x3f);
2939 break;
2940 case 5:
2941 unicode = (string[0] & 0x0f) << 24;
2942 unicode += ((string[1] & 0x3f) << 18);
2943 unicode += ((string[2] & 0x3f) << 12);
2944 unicode += ((string[3] & 0x3f) << 6);
2945 unicode += (string[4] & 0x3f);
2946 break;
2947 case 6:
2948 unicode = (string[0] & 0x01) << 30;
2949 unicode += ((string[1] & 0x3f) << 24);
2950 unicode += ((string[2] & 0x3f) << 18);
2951 unicode += ((string[3] & 0x3f) << 12);
2952 unicode += ((string[4] & 0x3f) << 6);
2953 unicode += (string[5] & 0x3f);
2954 break;
2955 default:
2956 die("Invalid unicode length");
2957 }
2958
2959 /* Invalid characters could return the special 0xfffd value but NUL
2960 * should be just as good. */
2961 return unicode > 0xffff ? 0 : unicode;
2962 }
2963
2964 /* Calculates how much of string can be shown within the given maximum width
2965 * and sets trimmed parameter to non-zero value if all of string could not be
2966 * shown.
2967 *
2968 * Additionally, adds to coloffset how many many columns to move to align with
2969 * the expected position. Takes into account how multi-byte and double-width
2970 * characters will effect the cursor position.
2971 *
2972 * Returns the number of bytes to output from string to satisfy max_width. */
2973 static size_t
2974 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
2975 {
2976 const char *start = string;
2977 const char *end = strchr(string, '\0');
2978 size_t mbwidth = 0;
2979 size_t width = 0;
2980
2981 *trimmed = 0;
2982
2983 while (string < end) {
2984 int c = *(unsigned char *) string;
2985 unsigned char bytes = utf8_bytes[c];
2986 size_t ucwidth;
2987 unsigned long unicode;
2988
2989 if (string + bytes > end)
2990 break;
2991
2992 /* Change representation to figure out whether
2993 * it is a single- or double-width character. */
2994
2995 unicode = utf8_to_unicode(string, bytes);
2996 /* FIXME: Graceful handling of invalid unicode character. */
2997 if (!unicode)
2998 break;
2999
3000 ucwidth = unicode_width(unicode);
3001 width += ucwidth;
3002 if (width > max_width) {
3003 *trimmed = 1;
3004 break;
3005 }
3006
3007 /* The column offset collects the differences between the
3008 * number of bytes encoding a character and the number of
3009 * columns will be used for rendering said character.
3010 *
3011 * So if some character A is encoded in 2 bytes, but will be
3012 * represented on the screen using only 1 byte this will and up
3013 * adding 1 to the multi-byte column offset.
3014 *
3015 * Assumes that no double-width character can be encoding in
3016 * less than two bytes. */
3017 if (bytes > ucwidth)
3018 mbwidth += bytes - ucwidth;
3019
3020 string += bytes;
3021 }
3022
3023 *coloffset += mbwidth;
3024
3025 return string - start;
3026 }
3027
3028
3029 /*
3030 * Status management
3031 */
3032
3033 /* Whether or not the curses interface has been initialized. */
3034 static bool cursed = FALSE;
3035
3036 /* The status window is used for polling keystrokes. */
3037 static WINDOW *status_win;
3038
3039 /* Update status and title window. */
3040 static void
3041 report(const char *msg, ...)
3042 {
3043 static bool empty = TRUE;
3044 struct view *view = display[current_view];
3045
3046 if (!empty || *msg) {
3047 va_list args;
3048
3049 va_start(args, msg);
3050
3051 werase(status_win);
3052 wmove(status_win, 0, 0);
3053 if (*msg) {
3054 vwprintw(status_win, msg, args);
3055 empty = FALSE;
3056 } else {
3057 empty = TRUE;
3058 }
3059 wrefresh(status_win);
3060
3061 va_end(args);
3062 }
3063
3064 update_view_title(view);
3065 update_display_cursor();
3066 }
3067
3068 /* Controls when nodelay should be in effect when polling user input. */
3069 static void
3070 set_nonblocking_input(bool loading)
3071 {
3072 static unsigned int loading_views;
3073
3074 if ((loading == FALSE && loading_views-- == 1) ||
3075 (loading == TRUE && loading_views++ == 0))
3076 nodelay(status_win, loading);
3077 }
3078
3079 static void
3080 init_display(void)
3081 {
3082 int x, y;
3083
3084 /* Initialize the curses library */
3085 if (isatty(STDIN_FILENO)) {
3086 cursed = !!initscr();
3087 } else {
3088 /* Leave stdin and stdout alone when acting as a pager. */
3089 FILE *io = fopen("/dev/tty", "r+");
3090
3091 if (!io)
3092 die("Failed to open /dev/tty");
3093 cursed = !!newterm(NULL, io, io);
3094 }
3095
3096 if (!cursed)
3097 die("Failed to initialize curses");
3098
3099 nonl(); /* Tell curses not to do NL->CR/NL on output */
3100 cbreak(); /* Take input chars one at a time, no wait for \n */
3101 noecho(); /* Don't echo input */
3102 leaveok(stdscr, TRUE);
3103
3104 if (has_colors())
3105 init_colors();
3106
3107 getmaxyx(stdscr, y, x);
3108 status_win = newwin(1, 0, y - 1, 0);
3109 if (!status_win)
3110 die("Failed to create status window");
3111
3112 /* Enable keyboard mapping */
3113 keypad(status_win, TRUE);
3114 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3115 }
3116
3117 static char *
3118 read_prompt(const char *prompt)
3119 {
3120 enum { READING, STOP, CANCEL } status = READING;
3121 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3122 int pos = 0;
3123
3124 while (status == READING) {
3125 struct view *view;
3126 int i, key;
3127
3128 foreach_view (view, i)
3129 update_view(view);
3130
3131 report("%s%.*s", prompt, pos, buf);
3132 /* Refresh, accept single keystroke of input */
3133 key = wgetch(status_win);
3134 switch (key) {
3135 case KEY_RETURN:
3136 case KEY_ENTER:
3137 case '\n':
3138 status = pos ? STOP : CANCEL;
3139 break;
3140
3141 case KEY_BACKSPACE:
3142 if (pos > 0)
3143 pos--;
3144 else
3145 status = CANCEL;
3146 break;
3147
3148 case KEY_ESC:
3149 status = CANCEL;
3150 break;
3151
3152 case ERR:
3153 break;
3154
3155 default:
3156 if (pos >= sizeof(buf)) {
3157 report("Input string too long");
3158 return NULL;
3159 }
3160
3161 if (isprint(key))
3162 buf[pos++] = (char) key;
3163 }
3164 }
3165
3166 if (status == CANCEL) {
3167 /* Clear the status window */
3168 report("");
3169 return NULL;
3170 }
3171
3172 buf[pos++] = 0;
3173
3174 return buf;
3175 }
3176
3177 /*
3178 * Repository references
3179 */
3180
3181 static struct ref *refs;
3182 static size_t refs_size;
3183
3184 /* Id <-> ref store */
3185 static struct ref ***id_refs;
3186 static size_t id_refs_size;
3187
3188 static struct ref **
3189 get_refs(char *id)
3190 {
3191 struct ref ***tmp_id_refs;
3192 struct ref **ref_list = NULL;
3193 size_t ref_list_size = 0;
3194 size_t i;
3195
3196 for (i = 0; i < id_refs_size; i++)
3197 if (!strcmp(id, id_refs[i][0]->id))
3198 return id_refs[i];
3199
3200 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3201 if (!tmp_id_refs)
3202 return NULL;
3203
3204 id_refs = tmp_id_refs;
3205
3206 for (i = 0; i < refs_size; i++) {
3207 struct ref **tmp;
3208
3209 if (strcmp(id, refs[i].id))
3210 continue;
3211
3212 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3213 if (!tmp) {
3214 if (ref_list)
3215 free(ref_list);
3216 return NULL;
3217 }
3218
3219 ref_list = tmp;
3220 if (ref_list_size > 0)
3221 ref_list[ref_list_size - 1]->next = 1;
3222 ref_list[ref_list_size] = &refs[i];
3223
3224 /* XXX: The properties of the commit chains ensures that we can
3225 * safely modify the shared ref. The repo references will
3226 * always be similar for the same id. */
3227 ref_list[ref_list_size]->next = 0;
3228 ref_list_size++;
3229 }
3230
3231 if (ref_list)
3232 id_refs[id_refs_size++] = ref_list;
3233
3234 return ref_list;
3235 }
3236
3237 static int
3238 read_ref(char *id, int idlen, char *name, int namelen)
3239 {
3240 struct ref *ref;
3241 bool tag = FALSE;
3242
3243 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3244 /* Commits referenced by tags has "^{}" appended. */
3245 if (name[namelen - 1] != '}')
3246 return OK;
3247
3248 while (namelen > 0 && name[namelen] != '^')
3249 namelen--;
3250
3251 tag = TRUE;
3252 namelen -= STRING_SIZE("refs/tags/");
3253 name += STRING_SIZE("refs/tags/");
3254
3255 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3256 namelen -= STRING_SIZE("refs/heads/");
3257 name += STRING_SIZE("refs/heads/");
3258
3259 } else if (!strcmp(name, "HEAD")) {
3260 return OK;
3261 }
3262
3263 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3264 if (!refs)
3265 return ERR;
3266
3267 ref = &refs[refs_size++];
3268 ref->name = malloc(namelen + 1);
3269 if (!ref->name)
3270 return ERR;
3271
3272 strncpy(ref->name, name, namelen);
3273 ref->name[namelen] = 0;
3274 ref->tag = tag;
3275 string_copy(ref->id, id);
3276
3277 return OK;
3278 }
3279
3280 static int
3281 load_refs(void)
3282 {
3283 const char *cmd_env = getenv("TIG_LS_REMOTE");
3284 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3285
3286 return read_properties(popen(cmd, "r"), "\t", read_ref);
3287 }
3288
3289 static int
3290 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3291 {
3292 if (!strcmp(name, "i18n.commitencoding"))
3293 string_copy(opt_encoding, value);
3294
3295 return OK;
3296 }
3297
3298 static int
3299 load_repo_config(void)
3300 {
3301 return read_properties(popen("git repo-config --list", "r"),
3302 "=", read_repo_config_option);
3303 }
3304
3305 static int
3306 read_properties(FILE *pipe, const char *separators,
3307 int (*read_property)(char *, int, char *, int))
3308 {
3309 char buffer[BUFSIZ];
3310 char *name;
3311 int state = OK;
3312
3313 if (!pipe)
3314 return ERR;
3315
3316 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3317 char *value;
3318 size_t namelen;
3319 size_t valuelen;
3320
3321 name = chomp_string(name);
3322 namelen = strcspn(name, separators);
3323
3324 if (name[namelen]) {
3325 name[namelen] = 0;
3326 value = chomp_string(name + namelen + 1);
3327 valuelen = strlen(value);
3328
3329 } else {
3330 value = "";
3331 valuelen = 0;
3332 }
3333
3334 state = read_property(name, namelen, value, valuelen);
3335 }
3336
3337 if (state != ERR && ferror(pipe))
3338 state = ERR;
3339
3340 pclose(pipe);
3341
3342 return state;
3343 }
3344
3345
3346 /*
3347 * Main
3348 */
3349
3350 static void __NORETURN
3351 quit(int sig)
3352 {
3353 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3354 if (cursed)
3355 endwin();
3356 exit(0);
3357 }
3358
3359 static void __NORETURN
3360 die(const char *err, ...)
3361 {
3362 va_list args;
3363
3364 endwin();
3365
3366 va_start(args, err);
3367 fputs("tig: ", stderr);
3368 vfprintf(stderr, err, args);
3369 fputs("\n", stderr);
3370 va_end(args);
3371
3372 exit(1);
3373 }
3374
3375 int
3376 main(int argc, char *argv[])
3377 {
3378 struct view *view;
3379 enum request request;
3380 size_t i;
3381
3382 signal(SIGINT, quit);
3383
3384 if (setlocale(LC_ALL, "")) {
3385 string_copy(opt_codeset, nl_langinfo(CODESET));
3386 }
3387
3388 if (load_options() == ERR)
3389 die("Failed to load user config.");
3390
3391 /* Load the repo config file so options can be overwritten from
3392 * the command line. */
3393 if (load_repo_config() == ERR)
3394 die("Failed to load repo config.");
3395
3396 if (!parse_options(argc, argv))
3397 return 0;
3398
3399 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3400 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3401 if (opt_iconv == (iconv_t) -1)
3402 die("Failed to initialize character set conversion");
3403 }
3404
3405 if (load_refs() == ERR)
3406 die("Failed to load refs.");
3407
3408 /* Require a git repository unless when running in pager mode. */
3409 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3410 die("Not a git repository");
3411
3412 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3413 view->cmd_env = getenv(view->cmd_env);
3414
3415 request = opt_request;
3416
3417 init_display();
3418
3419 while (view_driver(display[current_view], request)) {
3420 int key;
3421 int i;
3422
3423 foreach_view (view, i)
3424 update_view(view);
3425
3426 /* Refresh, accept single keystroke of input */
3427 key = wgetch(status_win);
3428
3429 request = get_keybinding(display[current_view]->keymap, key);
3430
3431 /* Some low-level request handling. This keeps access to
3432 * status_win restricted. */
3433 switch (request) {
3434 case REQ_PROMPT:
3435 {
3436 char *cmd = read_prompt(":");
3437
3438 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3439 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3440 opt_request = REQ_VIEW_DIFF;
3441 } else {
3442 opt_request = REQ_VIEW_PAGER;
3443 }
3444 break;
3445 }
3446
3447 request = REQ_NONE;
3448 break;
3449 }
3450 case REQ_SEARCH:
3451 case REQ_SEARCH_BACK:
3452 {
3453 const char *prompt = request == REQ_SEARCH
3454 ? "/" : "?";
3455 char *search = read_prompt(prompt);
3456
3457 if (search)
3458 string_copy(opt_search, search);
3459 else
3460 request = REQ_NONE;
3461 break;
3462 }
3463 case REQ_SCREEN_RESIZE:
3464 {
3465 int height, width;
3466
3467 getmaxyx(stdscr, height, width);
3468
3469 /* Resize the status view and let the view driver take
3470 * care of resizing the displayed views. */
3471 wresize(status_win, 1, width);
3472 mvwin(status_win, height - 1, 0);
3473 wrefresh(status_win);
3474 break;
3475 }
3476 default:
3477 break;
3478 }
3479 }
3480
3481 quit(0);
3482
3483 return 0;
3484 }
Full-screen terminal Git browser.