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