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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 */
14 #ifndef VERSION
15 #define VERSION "tig-0.4.git"
16 #endif
18 #ifndef DEBUG
19 #define NDEBUG
20 #endif
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>
33 #include <sys/types.h>
34 #include <regex.h>
36 #include <locale.h>
37 #include <langinfo.h>
38 #include <iconv.h>
40 #include <curses.h>
42 #if __GNUC__ >= 3
43 #define __NORETURN __attribute__((__noreturn__))
44 #else
45 #define __NORETURN
46 #endif
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);
54 #define ABS(x) ((x) >= 0 ? (x) : -(x))
55 #define MIN(x, y) ((x) < (y) ? (x) : (y))
57 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
58 #define STRING_SIZE(x) (sizeof(x) - 1)
60 #define SIZEOF_STR 1024 /* Default string size. */
61 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
62 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
63 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
65 /* This color name can be used to refer to the default term colors. */
66 #define COLOR_DEFAULT (-1)
68 #define ICONV_NONE ((iconv_t) -1)
70 /* The format and size of the date column in the main view. */
71 #define DATE_FORMAT "%Y-%m-%d %H:%M"
72 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
74 #define AUTHOR_COLS 20
76 /* The default interval between line numbers. */
77 #define NUMBER_INTERVAL 1
79 #define TABSIZE 8
81 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
83 #define TIG_LS_REMOTE \
84 "git ls-remote . 2>/dev/null"
86 #define TIG_DIFF_CMD \
87 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
89 #define TIG_LOG_CMD \
90 "git log --cc --stat -n100 %s 2>/dev/null"
92 #define TIG_MAIN_CMD \
93 "git log --topo-order --pretty=raw %s 2>/dev/null"
95 #define TIG_TREE_CMD \
96 "git ls-tree %s %s"
98 #define TIG_BLOB_CMD \
99 "git cat-file blob %s"
101 /* XXX: Needs to be defined to the empty string. */
102 #define TIG_HELP_CMD ""
103 #define TIG_PAGER_CMD ""
105 /* Some ascii-shorthands fitted into the ncurses namespace. */
106 #define KEY_TAB '\t'
107 #define KEY_RETURN '\r'
108 #define KEY_ESC 27
111 struct ref {
112 char *name; /* Ref name; tag or head names are shortened. */
113 char id[SIZEOF_REV]; /* Commit SHA1 ID */
114 unsigned int tag:1; /* Is it a tag? */
115 unsigned int next:1; /* For ref lists: are there more refs? */
116 };
118 static struct ref **get_refs(char *id);
120 struct int_map {
121 const char *name;
122 int namelen;
123 int value;
124 };
126 static int
127 set_from_int_map(struct int_map *map, size_t map_size,
128 int *value, const char *name, int namelen)
129 {
131 int i;
133 for (i = 0; i < map_size; i++)
134 if (namelen == map[i].namelen &&
135 !strncasecmp(name, map[i].name, namelen)) {
136 *value = map[i].value;
137 return OK;
138 }
140 return ERR;
141 }
144 /*
145 * String helpers
146 */
148 static inline void
149 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
150 {
151 if (srclen > dstlen - 1)
152 srclen = dstlen - 1;
154 strncpy(dst, src, srclen);
155 dst[srclen] = 0;
156 }
158 /* Shorthands for safely copying into a fixed buffer. */
160 #define string_copy(dst, src) \
161 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
163 #define string_ncopy(dst, src, srclen) \
164 string_ncopy_do(dst, sizeof(dst), src, srclen)
166 static char *
167 chomp_string(char *name)
168 {
169 int namelen;
171 while (isspace(*name))
172 name++;
174 namelen = strlen(name) - 1;
175 while (namelen > 0 && isspace(name[namelen]))
176 name[namelen--] = 0;
178 return name;
179 }
181 static bool
182 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
183 {
184 va_list args;
185 size_t pos = bufpos ? *bufpos : 0;
187 va_start(args, fmt);
188 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
189 va_end(args);
191 if (bufpos)
192 *bufpos = pos;
194 return pos >= bufsize ? FALSE : TRUE;
195 }
197 #define string_format(buf, fmt, args...) \
198 string_nformat(buf, sizeof(buf), NULL, fmt, args)
200 #define string_format_from(buf, from, fmt, args...) \
201 string_nformat(buf, sizeof(buf), from, fmt, args)
203 static int
204 string_enum_compare(const char *str1, const char *str2, int len)
205 {
206 size_t i;
208 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
210 /* Diff-Header == DIFF_HEADER */
211 for (i = 0; i < len; i++) {
212 if (toupper(str1[i]) == toupper(str2[i]))
213 continue;
215 if (string_enum_sep(str1[i]) &&
216 string_enum_sep(str2[i]))
217 continue;
219 return str1[i] - str2[i];
220 }
222 return 0;
223 }
225 /* Shell quoting
226 *
227 * NOTE: The following is a slightly modified copy of the git project's shell
228 * quoting routines found in the quote.c file.
229 *
230 * Help to copy the thing properly quoted for the shell safety. any single
231 * quote is replaced with '\'', any exclamation point is replaced with '\!',
232 * and the whole thing is enclosed in a
233 *
234 * E.g.
235 * original sq_quote result
236 * name ==> name ==> 'name'
237 * a b ==> a b ==> 'a b'
238 * a'b ==> a'\''b ==> 'a'\''b'
239 * a!b ==> a'\!'b ==> 'a'\!'b'
240 */
242 static size_t
243 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
244 {
245 char c;
247 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
249 BUFPUT('\'');
250 while ((c = *src++)) {
251 if (c == '\'' || c == '!') {
252 BUFPUT('\'');
253 BUFPUT('\\');
254 BUFPUT(c);
255 BUFPUT('\'');
256 } else {
257 BUFPUT(c);
258 }
259 }
260 BUFPUT('\'');
262 return bufsize;
263 }
266 /*
267 * User requests
268 */
270 #define REQ_INFO \
271 /* XXX: Keep the view request first and in sync with views[]. */ \
272 REQ_GROUP("View switching") \
273 REQ_(VIEW_MAIN, "Show main view"), \
274 REQ_(VIEW_DIFF, "Show diff view"), \
275 REQ_(VIEW_LOG, "Show log view"), \
276 REQ_(VIEW_TREE, "Show tree view"), \
277 REQ_(VIEW_BLOB, "Show blob view"), \
278 REQ_(VIEW_HELP, "Show help page"), \
279 REQ_(VIEW_PAGER, "Show pager view"), \
280 \
281 REQ_GROUP("View manipulation") \
282 REQ_(ENTER, "Enter current line and scroll"), \
283 REQ_(NEXT, "Move to next"), \
284 REQ_(PREVIOUS, "Move to previous"), \
285 REQ_(VIEW_NEXT, "Move focus to next view"), \
286 REQ_(VIEW_CLOSE, "Close the current view"), \
287 REQ_(QUIT, "Close all views and quit"), \
288 \
289 REQ_GROUP("Cursor navigation") \
290 REQ_(MOVE_UP, "Move cursor one line up"), \
291 REQ_(MOVE_DOWN, "Move cursor one line down"), \
292 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
293 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
294 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
295 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
296 \
297 REQ_GROUP("Scrolling") \
298 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
299 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
300 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
301 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
302 \
303 REQ_GROUP("Searching") \
304 REQ_(SEARCH, "Search the view"), \
305 REQ_(SEARCH_BACK, "Search backwards in the view"), \
306 REQ_(FIND_NEXT, "Find next search match"), \
307 REQ_(FIND_PREV, "Find previous search match"), \
308 \
309 REQ_GROUP("Misc") \
310 REQ_(NONE, "Do nothing"), \
311 REQ_(PROMPT, "Bring up the prompt"), \
312 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
313 REQ_(SCREEN_RESIZE, "Resize the screen"), \
314 REQ_(SHOW_VERSION, "Show version information"), \
315 REQ_(STOP_LOADING, "Stop all loading views"), \
316 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
317 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
320 /* User action requests. */
321 enum request {
322 #define REQ_GROUP(help)
323 #define REQ_(req, help) REQ_##req
325 /* Offset all requests to avoid conflicts with ncurses getch values. */
326 REQ_OFFSET = KEY_MAX + 1,
327 REQ_INFO,
328 REQ_UNKNOWN,
330 #undef REQ_GROUP
331 #undef REQ_
332 };
334 struct request_info {
335 enum request request;
336 char *name;
337 int namelen;
338 char *help;
339 };
341 static struct request_info req_info[] = {
342 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
343 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
344 REQ_INFO
345 #undef REQ_GROUP
346 #undef REQ_
347 };
349 static enum request
350 get_request(const char *name)
351 {
352 int namelen = strlen(name);
353 int i;
355 for (i = 0; i < ARRAY_SIZE(req_info); i++)
356 if (req_info[i].namelen == namelen &&
357 !string_enum_compare(req_info[i].name, name, namelen))
358 return req_info[i].request;
360 return REQ_UNKNOWN;
361 }
364 /*
365 * Options
366 */
368 static const char usage[] =
369 VERSION " (" __DATE__ ")\n"
370 "\n"
371 "Usage: tig [options]\n"
372 " or: tig [options] [--] [git log options]\n"
373 " or: tig [options] log [git log options]\n"
374 " or: tig [options] diff [git diff options]\n"
375 " or: tig [options] show [git show options]\n"
376 " or: tig [options] < [git command output]\n"
377 "\n"
378 "Options:\n"
379 " -l Start up in log view\n"
380 " -d Start up in diff view\n"
381 " -n[I], --line-number[=I] Show line numbers with given interval\n"
382 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
383 " -- Mark end of tig options\n"
384 " -v, --version Show version and exit\n"
385 " -h, --help Show help message and exit\n";
387 /* Option and state variables. */
388 static bool opt_line_number = FALSE;
389 static bool opt_rev_graph = TRUE;
390 static int opt_num_interval = NUMBER_INTERVAL;
391 static int opt_tab_size = TABSIZE;
392 static enum request opt_request = REQ_VIEW_MAIN;
393 static char opt_cmd[SIZEOF_STR] = "";
394 static char opt_path[SIZEOF_STR] = "";
395 static FILE *opt_pipe = NULL;
396 static char opt_encoding[20] = "UTF-8";
397 static bool opt_utf8 = TRUE;
398 static char opt_codeset[20] = "UTF-8";
399 static iconv_t opt_iconv = ICONV_NONE;
400 static char opt_search[SIZEOF_STR] = "";
402 enum option_type {
403 OPT_NONE,
404 OPT_INT,
405 };
407 static bool
408 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
409 {
410 va_list args;
411 char *value = "";
412 int *number;
414 if (opt[0] != '-')
415 return FALSE;
417 if (opt[1] == '-') {
418 int namelen = strlen(name);
420 opt += 2;
422 if (strncmp(opt, name, namelen))
423 return FALSE;
425 if (opt[namelen] == '=')
426 value = opt + namelen + 1;
428 } else {
429 if (!short_name || opt[1] != short_name)
430 return FALSE;
431 value = opt + 2;
432 }
434 va_start(args, type);
435 if (type == OPT_INT) {
436 number = va_arg(args, int *);
437 if (isdigit(*value))
438 *number = atoi(value);
439 }
440 va_end(args);
442 return TRUE;
443 }
445 /* Returns the index of log or diff command or -1 to exit. */
446 static bool
447 parse_options(int argc, char *argv[])
448 {
449 int i;
451 for (i = 1; i < argc; i++) {
452 char *opt = argv[i];
454 if (!strcmp(opt, "-l")) {
455 opt_request = REQ_VIEW_LOG;
456 continue;
457 }
459 if (!strcmp(opt, "-d")) {
460 opt_request = REQ_VIEW_DIFF;
461 continue;
462 }
464 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
465 opt_line_number = TRUE;
466 continue;
467 }
469 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
470 opt_tab_size = MIN(opt_tab_size, TABSIZE);
471 continue;
472 }
474 if (check_option(opt, 'v', "version", OPT_NONE)) {
475 printf("tig version %s\n", VERSION);
476 return FALSE;
477 }
479 if (check_option(opt, 'h', "help", OPT_NONE)) {
480 printf(usage);
481 return FALSE;
482 }
484 if (!strcmp(opt, "--")) {
485 i++;
486 break;
487 }
489 if (!strcmp(opt, "log") ||
490 !strcmp(opt, "diff") ||
491 !strcmp(opt, "show")) {
492 opt_request = opt[0] == 'l'
493 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
494 break;
495 }
497 if (opt[0] && opt[0] != '-')
498 break;
500 die("unknown option '%s'\n\n%s", opt, usage);
501 }
503 if (!isatty(STDIN_FILENO)) {
504 opt_request = REQ_VIEW_PAGER;
505 opt_pipe = stdin;
507 } else if (i < argc) {
508 size_t buf_size;
510 if (opt_request == REQ_VIEW_MAIN)
511 /* XXX: This is vulnerable to the user overriding
512 * options required for the main view parser. */
513 string_copy(opt_cmd, "git log --stat --pretty=raw");
514 else
515 string_copy(opt_cmd, "git");
516 buf_size = strlen(opt_cmd);
518 while (buf_size < sizeof(opt_cmd) && i < argc) {
519 opt_cmd[buf_size++] = ' ';
520 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
521 }
523 if (buf_size >= sizeof(opt_cmd))
524 die("command too long");
526 opt_cmd[buf_size] = 0;
528 }
530 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
531 opt_utf8 = FALSE;
533 return TRUE;
534 }
537 /*
538 * Line-oriented content detection.
539 */
541 #define LINE_INFO \
542 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
543 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
544 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
545 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
546 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
547 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
548 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
549 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
550 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
551 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
552 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
553 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
554 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
555 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
556 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
557 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
558 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
559 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
560 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
561 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
562 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
563 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
564 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
565 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
566 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
567 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
568 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
569 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
570 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
571 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
572 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
573 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
574 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
575 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
576 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
577 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
578 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
579 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
580 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
581 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
582 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
584 enum line_type {
585 #define LINE(type, line, fg, bg, attr) \
586 LINE_##type
587 LINE_INFO
588 #undef LINE
589 };
591 struct line_info {
592 const char *name; /* Option name. */
593 int namelen; /* Size of option name. */
594 const char *line; /* The start of line to match. */
595 int linelen; /* Size of string to match. */
596 int fg, bg, attr; /* Color and text attributes for the lines. */
597 };
599 static struct line_info line_info[] = {
600 #define LINE(type, line, fg, bg, attr) \
601 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
602 LINE_INFO
603 #undef LINE
604 };
606 static enum line_type
607 get_line_type(char *line)
608 {
609 int linelen = strlen(line);
610 enum line_type type;
612 for (type = 0; type < ARRAY_SIZE(line_info); type++)
613 /* Case insensitive search matches Signed-off-by lines better. */
614 if (linelen >= line_info[type].linelen &&
615 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
616 return type;
618 return LINE_DEFAULT;
619 }
621 static inline int
622 get_line_attr(enum line_type type)
623 {
624 assert(type < ARRAY_SIZE(line_info));
625 return COLOR_PAIR(type) | line_info[type].attr;
626 }
628 static struct line_info *
629 get_line_info(char *name, int namelen)
630 {
631 enum line_type type;
633 for (type = 0; type < ARRAY_SIZE(line_info); type++)
634 if (namelen == line_info[type].namelen &&
635 !string_enum_compare(line_info[type].name, name, namelen))
636 return &line_info[type];
638 return NULL;
639 }
641 static void
642 init_colors(void)
643 {
644 int default_bg = COLOR_BLACK;
645 int default_fg = COLOR_WHITE;
646 enum line_type type;
648 start_color();
650 if (use_default_colors() != ERR) {
651 default_bg = -1;
652 default_fg = -1;
653 }
655 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
656 struct line_info *info = &line_info[type];
657 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
658 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
660 init_pair(type, fg, bg);
661 }
662 }
664 struct line {
665 enum line_type type;
667 /* State flags */
668 unsigned int selected:1;
670 void *data; /* User data */
671 };
674 /*
675 * Keys
676 */
678 struct keybinding {
679 int alias;
680 enum request request;
681 struct keybinding *next;
682 };
684 static struct keybinding default_keybindings[] = {
685 /* View switching */
686 { 'm', REQ_VIEW_MAIN },
687 { 'd', REQ_VIEW_DIFF },
688 { 'l', REQ_VIEW_LOG },
689 { 't', REQ_VIEW_TREE },
690 { 'f', REQ_VIEW_BLOB },
691 { 'p', REQ_VIEW_PAGER },
692 { 'h', REQ_VIEW_HELP },
694 /* View manipulation */
695 { 'q', REQ_VIEW_CLOSE },
696 { KEY_TAB, REQ_VIEW_NEXT },
697 { KEY_RETURN, REQ_ENTER },
698 { KEY_UP, REQ_PREVIOUS },
699 { KEY_DOWN, REQ_NEXT },
701 /* Cursor navigation */
702 { 'k', REQ_MOVE_UP },
703 { 'j', REQ_MOVE_DOWN },
704 { KEY_HOME, REQ_MOVE_FIRST_LINE },
705 { KEY_END, REQ_MOVE_LAST_LINE },
706 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
707 { ' ', REQ_MOVE_PAGE_DOWN },
708 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
709 { 'b', REQ_MOVE_PAGE_UP },
710 { '-', REQ_MOVE_PAGE_UP },
712 /* Scrolling */
713 { KEY_IC, REQ_SCROLL_LINE_UP },
714 { KEY_DC, REQ_SCROLL_LINE_DOWN },
715 { 'w', REQ_SCROLL_PAGE_UP },
716 { 's', REQ_SCROLL_PAGE_DOWN },
718 /* Searching */
719 { '/', REQ_SEARCH },
720 { '?', REQ_SEARCH_BACK },
721 { 'n', REQ_FIND_NEXT },
722 { 'N', REQ_FIND_PREV },
724 /* Misc */
725 { 'Q', REQ_QUIT },
726 { 'z', REQ_STOP_LOADING },
727 { 'v', REQ_SHOW_VERSION },
728 { 'r', REQ_SCREEN_REDRAW },
729 { '.', REQ_TOGGLE_LINENO },
730 { 'g', REQ_TOGGLE_REV_GRAPH },
731 { ':', REQ_PROMPT },
733 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
734 { ERR, REQ_NONE },
736 /* Using the ncurses SIGWINCH handler. */
737 { KEY_RESIZE, REQ_SCREEN_RESIZE },
738 };
740 #define KEYMAP_INFO \
741 KEYMAP_(GENERIC), \
742 KEYMAP_(MAIN), \
743 KEYMAP_(DIFF), \
744 KEYMAP_(LOG), \
745 KEYMAP_(TREE), \
746 KEYMAP_(BLOB), \
747 KEYMAP_(PAGER), \
748 KEYMAP_(HELP) \
750 enum keymap {
751 #define KEYMAP_(name) KEYMAP_##name
752 KEYMAP_INFO
753 #undef KEYMAP_
754 };
756 static struct int_map keymap_table[] = {
757 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
758 KEYMAP_INFO
759 #undef KEYMAP_
760 };
762 #define set_keymap(map, name) \
763 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
765 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
767 static void
768 add_keybinding(enum keymap keymap, enum request request, int key)
769 {
770 struct keybinding *keybinding;
772 keybinding = calloc(1, sizeof(*keybinding));
773 if (!keybinding)
774 die("Failed to allocate keybinding");
776 keybinding->alias = key;
777 keybinding->request = request;
778 keybinding->next = keybindings[keymap];
779 keybindings[keymap] = keybinding;
780 }
782 /* Looks for a key binding first in the given map, then in the generic map, and
783 * lastly in the default keybindings. */
784 static enum request
785 get_keybinding(enum keymap keymap, int key)
786 {
787 struct keybinding *kbd;
788 int i;
790 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
791 if (kbd->alias == key)
792 return kbd->request;
794 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
795 if (kbd->alias == key)
796 return kbd->request;
798 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
799 if (default_keybindings[i].alias == key)
800 return default_keybindings[i].request;
802 return (enum request) key;
803 }
806 struct key {
807 char *name;
808 int value;
809 };
811 static struct key key_table[] = {
812 { "Enter", KEY_RETURN },
813 { "Space", ' ' },
814 { "Backspace", KEY_BACKSPACE },
815 { "Tab", KEY_TAB },
816 { "Escape", KEY_ESC },
817 { "Left", KEY_LEFT },
818 { "Right", KEY_RIGHT },
819 { "Up", KEY_UP },
820 { "Down", KEY_DOWN },
821 { "Insert", KEY_IC },
822 { "Delete", KEY_DC },
823 { "Hash", '#' },
824 { "Home", KEY_HOME },
825 { "End", KEY_END },
826 { "PageUp", KEY_PPAGE },
827 { "PageDown", KEY_NPAGE },
828 { "F1", KEY_F(1) },
829 { "F2", KEY_F(2) },
830 { "F3", KEY_F(3) },
831 { "F4", KEY_F(4) },
832 { "F5", KEY_F(5) },
833 { "F6", KEY_F(6) },
834 { "F7", KEY_F(7) },
835 { "F8", KEY_F(8) },
836 { "F9", KEY_F(9) },
837 { "F10", KEY_F(10) },
838 { "F11", KEY_F(11) },
839 { "F12", KEY_F(12) },
840 };
842 static int
843 get_key_value(const char *name)
844 {
845 int i;
847 for (i = 0; i < ARRAY_SIZE(key_table); i++)
848 if (!strcasecmp(key_table[i].name, name))
849 return key_table[i].value;
851 if (strlen(name) == 1 && isprint(*name))
852 return (int) *name;
854 return ERR;
855 }
857 static char *
858 get_key(enum request request)
859 {
860 static char buf[BUFSIZ];
861 static char key_char[] = "'X'";
862 size_t pos = 0;
863 char *sep = " ";
864 int i;
866 buf[pos] = 0;
868 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
869 struct keybinding *keybinding = &default_keybindings[i];
870 char *seq = NULL;
871 int key;
873 if (keybinding->request != request)
874 continue;
876 for (key = 0; key < ARRAY_SIZE(key_table); key++)
877 if (key_table[key].value == keybinding->alias)
878 seq = key_table[key].name;
880 if (seq == NULL &&
881 keybinding->alias < 127 &&
882 isprint(keybinding->alias)) {
883 key_char[1] = (char) keybinding->alias;
884 seq = key_char;
885 }
887 if (!seq)
888 seq = "'?'";
890 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
891 return "Too many keybindings!";
892 sep = ", ";
893 }
895 return buf;
896 }
899 /*
900 * User config file handling.
901 */
903 static struct int_map color_map[] = {
904 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
905 COLOR_MAP(DEFAULT),
906 COLOR_MAP(BLACK),
907 COLOR_MAP(BLUE),
908 COLOR_MAP(CYAN),
909 COLOR_MAP(GREEN),
910 COLOR_MAP(MAGENTA),
911 COLOR_MAP(RED),
912 COLOR_MAP(WHITE),
913 COLOR_MAP(YELLOW),
914 };
916 #define set_color(color, name) \
917 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
919 static struct int_map attr_map[] = {
920 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
921 ATTR_MAP(NORMAL),
922 ATTR_MAP(BLINK),
923 ATTR_MAP(BOLD),
924 ATTR_MAP(DIM),
925 ATTR_MAP(REVERSE),
926 ATTR_MAP(STANDOUT),
927 ATTR_MAP(UNDERLINE),
928 };
930 #define set_attribute(attr, name) \
931 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
933 static int config_lineno;
934 static bool config_errors;
935 static char *config_msg;
937 /* Wants: object fgcolor bgcolor [attr] */
938 static int
939 option_color_command(int argc, char *argv[])
940 {
941 struct line_info *info;
943 if (argc != 3 && argc != 4) {
944 config_msg = "Wrong number of arguments given to color command";
945 return ERR;
946 }
948 info = get_line_info(argv[0], strlen(argv[0]));
949 if (!info) {
950 config_msg = "Unknown color name";
951 return ERR;
952 }
954 if (set_color(&info->fg, argv[1]) == ERR ||
955 set_color(&info->bg, argv[2]) == ERR) {
956 config_msg = "Unknown color";
957 return ERR;
958 }
960 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
961 config_msg = "Unknown attribute";
962 return ERR;
963 }
965 return OK;
966 }
968 /* Wants: name = value */
969 static int
970 option_set_command(int argc, char *argv[])
971 {
972 if (argc != 3) {
973 config_msg = "Wrong number of arguments given to set command";
974 return ERR;
975 }
977 if (strcmp(argv[1], "=")) {
978 config_msg = "No value assigned";
979 return ERR;
980 }
982 if (!strcmp(argv[0], "show-rev-graph")) {
983 opt_rev_graph = (!strcmp(argv[2], "1") ||
984 !strcmp(argv[2], "true") ||
985 !strcmp(argv[2], "yes"));
986 return OK;
987 }
989 if (!strcmp(argv[0], "line-number-interval")) {
990 opt_num_interval = atoi(argv[2]);
991 return OK;
992 }
994 if (!strcmp(argv[0], "tab-size")) {
995 opt_tab_size = atoi(argv[2]);
996 return OK;
997 }
999 if (!strcmp(argv[0], "commit-encoding")) {
1000 char *arg = argv[2];
1001 int delimiter = *arg;
1002 int i;
1004 switch (delimiter) {
1005 case '"':
1006 case '\'':
1007 for (arg++, i = 0; arg[i]; i++)
1008 if (arg[i] == delimiter) {
1009 arg[i] = 0;
1010 break;
1011 }
1012 default:
1013 string_copy(opt_encoding, arg);
1014 return OK;
1015 }
1016 }
1018 config_msg = "Unknown variable name";
1019 return ERR;
1020 }
1022 /* Wants: mode request key */
1023 static int
1024 option_bind_command(int argc, char *argv[])
1025 {
1026 enum request request;
1027 int keymap;
1028 int key;
1030 if (argc != 3) {
1031 config_msg = "Wrong number of arguments given to bind command";
1032 return ERR;
1033 }
1035 if (set_keymap(&keymap, argv[0]) == ERR) {
1036 config_msg = "Unknown key map";
1037 return ERR;
1038 }
1040 key = get_key_value(argv[1]);
1041 if (key == ERR) {
1042 config_msg = "Unknown key";
1043 return ERR;
1044 }
1046 request = get_request(argv[2]);
1047 if (request == REQ_UNKNOWN) {
1048 config_msg = "Unknown request name";
1049 return ERR;
1050 }
1052 add_keybinding(keymap, request, key);
1054 return OK;
1055 }
1057 static int
1058 set_option(char *opt, char *value)
1059 {
1060 char *argv[16];
1061 int valuelen;
1062 int argc = 0;
1064 /* Tokenize */
1065 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1066 argv[argc++] = value;
1068 value += valuelen;
1069 if (!*value)
1070 break;
1072 *value++ = 0;
1073 while (isspace(*value))
1074 value++;
1075 }
1077 if (!strcmp(opt, "color"))
1078 return option_color_command(argc, argv);
1080 if (!strcmp(opt, "set"))
1081 return option_set_command(argc, argv);
1083 if (!strcmp(opt, "bind"))
1084 return option_bind_command(argc, argv);
1086 config_msg = "Unknown option command";
1087 return ERR;
1088 }
1090 static int
1091 read_option(char *opt, int optlen, char *value, int valuelen)
1092 {
1093 int status = OK;
1095 config_lineno++;
1096 config_msg = "Internal error";
1098 /* Check for comment markers, since read_properties() will
1099 * only ensure opt and value are split at first " \t". */
1100 optlen = strcspn(opt, "#");
1101 if (optlen == 0)
1102 return OK;
1104 if (opt[optlen] != 0) {
1105 config_msg = "No option value";
1106 status = ERR;
1108 } else {
1109 /* Look for comment endings in the value. */
1110 int len = strcspn(value, "#");
1112 if (len < valuelen) {
1113 valuelen = len;
1114 value[valuelen] = 0;
1115 }
1117 status = set_option(opt, value);
1118 }
1120 if (status == ERR) {
1121 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1122 config_lineno, optlen, opt, config_msg);
1123 config_errors = TRUE;
1124 }
1126 /* Always keep going if errors are encountered. */
1127 return OK;
1128 }
1130 static int
1131 load_options(void)
1132 {
1133 char *home = getenv("HOME");
1134 char buf[SIZEOF_STR];
1135 FILE *file;
1137 config_lineno = 0;
1138 config_errors = FALSE;
1140 if (!home || !string_format(buf, "%s/.tigrc", home))
1141 return ERR;
1143 /* It's ok that the file doesn't exist. */
1144 file = fopen(buf, "r");
1145 if (!file)
1146 return OK;
1148 if (read_properties(file, " \t", read_option) == ERR ||
1149 config_errors == TRUE)
1150 fprintf(stderr, "Errors while loading %s.\n", buf);
1152 return OK;
1153 }
1156 /*
1157 * The viewer
1158 */
1160 struct view;
1161 struct view_ops;
1163 /* The display array of active views and the index of the current view. */
1164 static struct view *display[2];
1165 static unsigned int current_view;
1167 #define foreach_displayed_view(view, i) \
1168 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1170 #define displayed_views() (display[1] != NULL ? 2 : 1)
1172 /* Current head and commit ID */
1173 static char ref_blob[SIZEOF_REF] = "";
1174 static char ref_commit[SIZEOF_REF] = "HEAD";
1175 static char ref_head[SIZEOF_REF] = "HEAD";
1177 struct view {
1178 const char *name; /* View name */
1179 const char *cmd_fmt; /* Default command line format */
1180 const char *cmd_env; /* Command line set via environment */
1181 const char *id; /* Points to either of ref_{head,commit,blob} */
1183 struct view_ops *ops; /* View operations */
1185 enum keymap keymap; /* What keymap does this view have */
1187 char cmd[SIZEOF_STR]; /* Command buffer */
1188 char ref[SIZEOF_REF]; /* Hovered commit reference */
1189 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1191 int height, width; /* The width and height of the main window */
1192 WINDOW *win; /* The main window */
1193 WINDOW *title; /* The title window living below the main window */
1195 /* Navigation */
1196 unsigned long offset; /* Offset of the window top */
1197 unsigned long lineno; /* Current line number */
1199 /* Searching */
1200 char grep[SIZEOF_STR]; /* Search string */
1201 regex_t *regex; /* Pre-compiled regex */
1203 /* If non-NULL, points to the view that opened this view. If this view
1204 * is closed tig will switch back to the parent view. */
1205 struct view *parent;
1207 /* Buffering */
1208 unsigned long lines; /* Total number of lines */
1209 struct line *line; /* Line index */
1210 unsigned long line_size;/* Total number of allocated lines */
1211 unsigned int digits; /* Number of digits in the lines member. */
1213 /* Loading */
1214 FILE *pipe;
1215 time_t start_time;
1216 };
1218 struct view_ops {
1219 /* What type of content being displayed. Used in the title bar. */
1220 const char *type;
1221 /* Draw one line; @lineno must be < view->height. */
1222 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1223 /* Read one line; updates view->line. */
1224 bool (*read)(struct view *view, char *data);
1225 /* Depending on view, change display based on current line. */
1226 bool (*enter)(struct view *view, struct line *line);
1227 /* Search for regex in a line. */
1228 bool (*grep)(struct view *view, struct line *line);
1229 /* Select line */
1230 void (*select)(struct view *view, struct line *line);
1231 };
1233 static struct view_ops pager_ops;
1234 static struct view_ops main_ops;
1235 static struct view_ops tree_ops;
1236 static struct view_ops blob_ops;
1238 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1239 { name, cmd, #env, ref, ops, map}
1241 #define VIEW_(id, name, ops, ref) \
1242 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1245 static struct view views[] = {
1246 VIEW_(MAIN, "main", &main_ops, ref_head),
1247 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1248 VIEW_(LOG, "log", &pager_ops, ref_head),
1249 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1250 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1251 VIEW_(HELP, "help", &pager_ops, "static"),
1252 VIEW_(PAGER, "pager", &pager_ops, "static"),
1253 };
1255 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1257 #define foreach_view(view, i) \
1258 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1260 #define view_is_displayed(view) \
1261 (view == display[0] || view == display[1])
1263 static bool
1264 draw_view_line(struct view *view, unsigned int lineno)
1265 {
1266 struct line *line;
1267 bool selected = (view->offset + lineno == view->lineno);
1269 assert(view_is_displayed(view));
1271 if (view->offset + lineno >= view->lines)
1272 return FALSE;
1274 line = &view->line[view->offset + lineno];
1276 if (selected) {
1277 line->selected = TRUE;
1278 view->ops->select(view, line);
1279 } else if (line->selected) {
1280 line->selected = FALSE;
1281 wmove(view->win, lineno, 0);
1282 wclrtoeol(view->win);
1283 }
1285 return view->ops->draw(view, line, lineno, selected);
1286 }
1288 static void
1289 redraw_view_from(struct view *view, int lineno)
1290 {
1291 assert(0 <= lineno && lineno < view->height);
1293 for (; lineno < view->height; lineno++) {
1294 if (!draw_view_line(view, lineno))
1295 break;
1296 }
1298 redrawwin(view->win);
1299 wrefresh(view->win);
1300 }
1302 static void
1303 redraw_view(struct view *view)
1304 {
1305 wclear(view->win);
1306 redraw_view_from(view, 0);
1307 }
1310 static void
1311 update_view_title(struct view *view)
1312 {
1313 assert(view_is_displayed(view));
1315 if (view == display[current_view])
1316 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1317 else
1318 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1320 werase(view->title);
1321 wmove(view->title, 0, 0);
1323 if (*view->ref)
1324 wprintw(view->title, "[%s] %s", view->name, view->ref);
1325 else
1326 wprintw(view->title, "[%s]", view->name);
1328 if (view->lines || view->pipe) {
1329 unsigned int view_lines = view->offset + view->height;
1330 unsigned int lines = view->lines
1331 ? MIN(view_lines, view->lines) * 100 / view->lines
1332 : 0;
1334 wprintw(view->title, " - %s %d of %d (%d%%)",
1335 view->ops->type,
1336 view->lineno + 1,
1337 view->lines,
1338 lines);
1339 }
1341 if (view->pipe) {
1342 time_t secs = time(NULL) - view->start_time;
1344 /* Three git seconds are a long time ... */
1345 if (secs > 2)
1346 wprintw(view->title, " %lds", secs);
1347 }
1349 wmove(view->title, 0, view->width - 1);
1350 wrefresh(view->title);
1351 }
1353 static void
1354 resize_display(void)
1355 {
1356 int offset, i;
1357 struct view *base = display[0];
1358 struct view *view = display[1] ? display[1] : display[0];
1360 /* Setup window dimensions */
1362 getmaxyx(stdscr, base->height, base->width);
1364 /* Make room for the status window. */
1365 base->height -= 1;
1367 if (view != base) {
1368 /* Horizontal split. */
1369 view->width = base->width;
1370 view->height = SCALE_SPLIT_VIEW(base->height);
1371 base->height -= view->height;
1373 /* Make room for the title bar. */
1374 view->height -= 1;
1375 }
1377 /* Make room for the title bar. */
1378 base->height -= 1;
1380 offset = 0;
1382 foreach_displayed_view (view, i) {
1383 if (!view->win) {
1384 view->win = newwin(view->height, 0, offset, 0);
1385 if (!view->win)
1386 die("Failed to create %s view", view->name);
1388 scrollok(view->win, TRUE);
1390 view->title = newwin(1, 0, offset + view->height, 0);
1391 if (!view->title)
1392 die("Failed to create title window");
1394 } else {
1395 wresize(view->win, view->height, view->width);
1396 mvwin(view->win, offset, 0);
1397 mvwin(view->title, offset + view->height, 0);
1398 }
1400 offset += view->height + 1;
1401 }
1402 }
1404 static void
1405 redraw_display(void)
1406 {
1407 struct view *view;
1408 int i;
1410 foreach_displayed_view (view, i) {
1411 redraw_view(view);
1412 update_view_title(view);
1413 }
1414 }
1416 static void
1417 update_display_cursor(struct view *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 }
1429 /*
1430 * Navigation
1431 */
1433 /* Scrolling backend */
1434 static void
1435 do_scroll_view(struct view *view, int lines)
1436 {
1437 bool redraw_current_line = FALSE;
1439 /* The rendering expects the new offset. */
1440 view->offset += lines;
1442 assert(0 <= view->offset && view->offset < view->lines);
1443 assert(lines);
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 }
1454 assert(view->offset <= view->lineno && view->lineno < view->lines);
1456 /* Redraw the whole screen if scrolling is pointless. */
1457 if (view->height < ABS(lines)) {
1458 redraw_view(view);
1460 } else {
1461 int line = lines > 0 ? view->height - lines : 0;
1462 int end = line + ABS(lines);
1464 wscrl(view->win, lines);
1466 for (; line < end; line++) {
1467 if (!draw_view_line(view, line))
1468 break;
1469 }
1471 if (redraw_current_line)
1472 draw_view_line(view, view->lineno - view->offset);
1473 }
1475 redrawwin(view->win);
1476 wrefresh(view->win);
1477 report("");
1478 }
1480 /* Scroll frontend */
1481 static void
1482 scroll_view(struct view *view, enum request request)
1483 {
1484 int lines = 1;
1486 assert(view_is_displayed(view));
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;
1495 if (lines == 0 || view->offset + view->height >= view->lines) {
1496 report("Cannot scroll beyond the last line");
1497 return;
1498 }
1499 break;
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;
1507 if (lines == 0) {
1508 report("Cannot scroll beyond the first line");
1509 return;
1510 }
1512 lines = -lines;
1513 break;
1515 default:
1516 die("request %d not handled in switch", request);
1517 }
1519 do_scroll_view(view, lines);
1520 }
1522 /* Cursor moving */
1523 static void
1524 move_view(struct view *view, enum request request)
1525 {
1526 int scroll_steps = 0;
1527 int steps;
1529 switch (request) {
1530 case REQ_MOVE_FIRST_LINE:
1531 steps = -view->lineno;
1532 break;
1534 case REQ_MOVE_LAST_LINE:
1535 steps = view->lines - view->lineno - 1;
1536 break;
1538 case REQ_MOVE_PAGE_UP:
1539 steps = view->height > view->lineno
1540 ? -view->lineno : -view->height;
1541 break;
1543 case REQ_MOVE_PAGE_DOWN:
1544 steps = view->lineno + view->height >= view->lines
1545 ? view->lines - view->lineno - 1 : view->height;
1546 break;
1548 case REQ_MOVE_UP:
1549 steps = -1;
1550 break;
1552 case REQ_MOVE_DOWN:
1553 steps = 1;
1554 break;
1556 default:
1557 die("request %d not handled in switch", request);
1558 }
1560 if (steps <= 0 && view->lineno == 0) {
1561 report("Cannot move beyond the first line");
1562 return;
1564 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1565 report("Cannot move beyond the last line");
1566 return;
1567 }
1569 /* Move the current line */
1570 view->lineno += steps;
1571 assert(0 <= view->lineno && view->lineno < view->lines);
1573 /* Check whether the view needs to be scrolled */
1574 if (view->lineno < view->offset ||
1575 view->lineno >= view->offset + view->height) {
1576 scroll_steps = steps;
1577 if (steps < 0 && -steps > view->offset) {
1578 scroll_steps = -view->offset;
1580 } else if (steps > 0) {
1581 if (view->lineno == view->lines - 1 &&
1582 view->lines > view->height) {
1583 scroll_steps = view->lines - view->offset - 1;
1584 if (scroll_steps >= view->height)
1585 scroll_steps -= view->height - 1;
1586 }
1587 }
1588 }
1590 if (!view_is_displayed(view)) {
1591 view->offset += steps;
1592 view->ops->select(view, &view->line[view->lineno]);
1593 return;
1594 }
1596 /* Repaint the old "current" line if we be scrolling */
1597 if (ABS(steps) < view->height)
1598 draw_view_line(view, view->lineno - steps - view->offset);
1600 if (scroll_steps) {
1601 do_scroll_view(view, scroll_steps);
1602 return;
1603 }
1605 /* Draw the current line */
1606 draw_view_line(view, view->lineno - view->offset);
1608 redrawwin(view->win);
1609 wrefresh(view->win);
1610 report("");
1611 }
1614 /*
1615 * Searching
1616 */
1618 static void search_view(struct view *view, enum request request);
1620 static bool
1621 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1622 {
1623 assert(view_is_displayed(view));
1625 if (!view->ops->grep(view, line))
1626 return FALSE;
1628 if (lineno - view->offset >= view->height) {
1629 view->offset = lineno;
1630 view->lineno = lineno;
1631 redraw_view(view);
1633 } else {
1634 unsigned long old_lineno = view->lineno - view->offset;
1636 view->lineno = lineno;
1637 draw_view_line(view, old_lineno);
1639 draw_view_line(view, view->lineno - view->offset);
1640 redrawwin(view->win);
1641 wrefresh(view->win);
1642 }
1644 report("Line %ld matches '%s'", lineno + 1, view->grep);
1645 return TRUE;
1646 }
1648 static void
1649 find_next(struct view *view, enum request request)
1650 {
1651 unsigned long lineno = view->lineno;
1652 int direction;
1654 if (!*view->grep) {
1655 if (!*opt_search)
1656 report("No previous search");
1657 else
1658 search_view(view, request);
1659 return;
1660 }
1662 switch (request) {
1663 case REQ_SEARCH:
1664 case REQ_FIND_NEXT:
1665 direction = 1;
1666 break;
1668 case REQ_SEARCH_BACK:
1669 case REQ_FIND_PREV:
1670 direction = -1;
1671 break;
1673 default:
1674 return;
1675 }
1677 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1678 lineno += direction;
1680 /* Note, lineno is unsigned long so will wrap around in which case it
1681 * will become bigger than view->lines. */
1682 for (; lineno < view->lines; lineno += direction) {
1683 struct line *line = &view->line[lineno];
1685 if (find_next_line(view, lineno, line))
1686 return;
1687 }
1689 report("No match found for '%s'", view->grep);
1690 }
1692 static void
1693 search_view(struct view *view, enum request request)
1694 {
1695 int regex_err;
1697 if (view->regex) {
1698 regfree(view->regex);
1699 *view->grep = 0;
1700 } else {
1701 view->regex = calloc(1, sizeof(*view->regex));
1702 if (!view->regex)
1703 return;
1704 }
1706 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1707 if (regex_err != 0) {
1708 char buf[SIZEOF_STR] = "unknown error";
1710 regerror(regex_err, view->regex, buf, sizeof(buf));
1711 report("Search failed: %s", buf);
1712 return;
1713 }
1715 string_copy(view->grep, opt_search);
1717 find_next(view, request);
1718 }
1720 /*
1721 * Incremental updating
1722 */
1724 static void
1725 end_update(struct view *view)
1726 {
1727 if (!view->pipe)
1728 return;
1729 set_nonblocking_input(FALSE);
1730 if (view->pipe == stdin)
1731 fclose(view->pipe);
1732 else
1733 pclose(view->pipe);
1734 view->pipe = NULL;
1735 }
1737 static bool
1738 begin_update(struct view *view)
1739 {
1740 const char *id = view->id;
1742 if (view->pipe)
1743 end_update(view);
1745 if (opt_cmd[0]) {
1746 string_copy(view->cmd, opt_cmd);
1747 opt_cmd[0] = 0;
1748 /* When running random commands, the view ref could have become
1749 * invalid so clear it. */
1750 view->ref[0] = 0;
1752 } else if (view == VIEW(REQ_VIEW_TREE)) {
1753 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1755 if (strcmp(view->vid, view->id))
1756 opt_path[0] = 0;
1758 if (!string_format(view->cmd, format, id, opt_path))
1759 return FALSE;
1761 } else {
1762 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1764 if (!string_format(view->cmd, format, id, id, id, id, id))
1765 return FALSE;
1766 }
1768 /* Special case for the pager view. */
1769 if (opt_pipe) {
1770 view->pipe = opt_pipe;
1771 opt_pipe = NULL;
1772 } else {
1773 view->pipe = popen(view->cmd, "r");
1774 }
1776 if (!view->pipe)
1777 return FALSE;
1779 set_nonblocking_input(TRUE);
1781 view->offset = 0;
1782 view->lines = 0;
1783 view->lineno = 0;
1784 string_copy(view->vid, id);
1786 if (view->line) {
1787 int i;
1789 for (i = 0; i < view->lines; i++)
1790 if (view->line[i].data)
1791 free(view->line[i].data);
1793 free(view->line);
1794 view->line = NULL;
1795 }
1797 view->start_time = time(NULL);
1799 return TRUE;
1800 }
1802 static struct line *
1803 realloc_lines(struct view *view, size_t line_size)
1804 {
1805 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1807 if (!tmp)
1808 return NULL;
1810 view->line = tmp;
1811 view->line_size = line_size;
1812 return view->line;
1813 }
1815 static bool
1816 update_view(struct view *view)
1817 {
1818 char in_buffer[BUFSIZ];
1819 char out_buffer[BUFSIZ * 2];
1820 char *line;
1821 /* The number of lines to read. If too low it will cause too much
1822 * redrawing (and possible flickering), if too high responsiveness
1823 * will suffer. */
1824 unsigned long lines = view->height;
1825 int redraw_from = -1;
1827 if (!view->pipe)
1828 return TRUE;
1830 /* Only redraw if lines are visible. */
1831 if (view->offset + view->height >= view->lines)
1832 redraw_from = view->lines - view->offset;
1834 /* FIXME: This is probably not perfect for backgrounded views. */
1835 if (!realloc_lines(view, view->lines + lines))
1836 goto alloc_error;
1838 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1839 size_t linelen = strlen(line);
1841 if (linelen)
1842 line[linelen - 1] = 0;
1844 if (opt_iconv != ICONV_NONE) {
1845 char *inbuf = line;
1846 size_t inlen = linelen;
1848 char *outbuf = out_buffer;
1849 size_t outlen = sizeof(out_buffer);
1851 size_t ret;
1853 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1854 if (ret != (size_t) -1) {
1855 line = out_buffer;
1856 linelen = strlen(out_buffer);
1857 }
1858 }
1860 if (!view->ops->read(view, line))
1861 goto alloc_error;
1863 if (lines-- == 1)
1864 break;
1865 }
1867 {
1868 int digits;
1870 lines = view->lines;
1871 for (digits = 0; lines; digits++)
1872 lines /= 10;
1874 /* Keep the displayed view in sync with line number scaling. */
1875 if (digits != view->digits) {
1876 view->digits = digits;
1877 redraw_from = 0;
1878 }
1879 }
1881 if (!view_is_displayed(view))
1882 goto check_pipe;
1884 if (view == VIEW(REQ_VIEW_TREE)) {
1885 /* Clear the view and redraw everything since the tree sorting
1886 * might have rearranged things. */
1887 redraw_view(view);
1889 } else if (redraw_from >= 0) {
1890 /* If this is an incremental update, redraw the previous line
1891 * since for commits some members could have changed when
1892 * loading the main view. */
1893 if (redraw_from > 0)
1894 redraw_from--;
1896 /* Incrementally draw avoids flickering. */
1897 redraw_view_from(view, redraw_from);
1898 }
1900 /* Update the title _after_ the redraw so that if the redraw picks up a
1901 * commit reference in view->ref it'll be available here. */
1902 update_view_title(view);
1904 check_pipe:
1905 if (ferror(view->pipe)) {
1906 report("Failed to read: %s", strerror(errno));
1907 goto end;
1909 } else if (feof(view->pipe)) {
1910 report("");
1911 goto end;
1912 }
1914 return TRUE;
1916 alloc_error:
1917 report("Allocation failure");
1919 end:
1920 end_update(view);
1921 return FALSE;
1922 }
1925 /*
1926 * View opening
1927 */
1929 static void open_help_view(struct view *view)
1930 {
1931 char buf[BUFSIZ];
1932 int lines = ARRAY_SIZE(req_info) + 2;
1933 int i;
1935 if (view->lines > 0)
1936 return;
1938 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1939 if (!req_info[i].request)
1940 lines++;
1942 view->line = calloc(lines, sizeof(*view->line));
1943 if (!view->line) {
1944 report("Allocation failure");
1945 return;
1946 }
1948 view->ops->read(view, "Quick reference for tig keybindings:");
1950 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1951 char *key;
1953 if (!req_info[i].request) {
1954 view->ops->read(view, "");
1955 view->ops->read(view, req_info[i].help);
1956 continue;
1957 }
1959 key = get_key(req_info[i].request);
1960 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1961 continue;
1963 view->ops->read(view, buf);
1964 }
1965 }
1967 enum open_flags {
1968 OPEN_DEFAULT = 0, /* Use default view switching. */
1969 OPEN_SPLIT = 1, /* Split current view. */
1970 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1971 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1972 };
1974 static void
1975 open_view(struct view *prev, enum request request, enum open_flags flags)
1976 {
1977 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1978 bool split = !!(flags & OPEN_SPLIT);
1979 bool reload = !!(flags & OPEN_RELOAD);
1980 struct view *view = VIEW(request);
1981 int nviews = displayed_views();
1982 struct view *base_view = display[0];
1984 if (view == prev && nviews == 1 && !reload) {
1985 report("Already in %s view", view->name);
1986 return;
1987 }
1989 if (view == VIEW(REQ_VIEW_HELP)) {
1990 open_help_view(view);
1992 } else if ((reload || strcmp(view->vid, view->id)) &&
1993 !begin_update(view)) {
1994 report("Failed to load %s view", view->name);
1995 return;
1996 }
1998 if (split) {
1999 display[1] = view;
2000 if (!backgrounded)
2001 current_view = 1;
2002 } else {
2003 /* Maximize the current view. */
2004 memset(display, 0, sizeof(display));
2005 current_view = 0;
2006 display[current_view] = view;
2007 }
2009 /* Resize the view when switching between split- and full-screen,
2010 * or when switching between two different full-screen views. */
2011 if (nviews != displayed_views() ||
2012 (nviews == 1 && base_view != display[0]))
2013 resize_display();
2015 if (split && prev->lineno - prev->offset >= prev->height) {
2016 /* Take the title line into account. */
2017 int lines = prev->lineno - prev->offset - prev->height + 1;
2019 /* Scroll the view that was split if the current line is
2020 * outside the new limited view. */
2021 do_scroll_view(prev, lines);
2022 }
2024 if (prev && view != prev) {
2025 if (split && !backgrounded) {
2026 /* "Blur" the previous view. */
2027 update_view_title(prev);
2028 }
2030 view->parent = prev;
2031 }
2033 if (view->pipe && view->lines == 0) {
2034 /* Clear the old view and let the incremental updating refill
2035 * the screen. */
2036 wclear(view->win);
2037 report("");
2038 } else {
2039 redraw_view(view);
2040 report("");
2041 }
2043 /* If the view is backgrounded the above calls to report()
2044 * won't redraw the view title. */
2045 if (backgrounded)
2046 update_view_title(view);
2047 }
2050 /*
2051 * User request switch noodle
2052 */
2054 static int
2055 view_driver(struct view *view, enum request request)
2056 {
2057 int i;
2059 switch (request) {
2060 case REQ_MOVE_UP:
2061 case REQ_MOVE_DOWN:
2062 case REQ_MOVE_PAGE_UP:
2063 case REQ_MOVE_PAGE_DOWN:
2064 case REQ_MOVE_FIRST_LINE:
2065 case REQ_MOVE_LAST_LINE:
2066 move_view(view, request);
2067 break;
2069 case REQ_SCROLL_LINE_DOWN:
2070 case REQ_SCROLL_LINE_UP:
2071 case REQ_SCROLL_PAGE_DOWN:
2072 case REQ_SCROLL_PAGE_UP:
2073 scroll_view(view, request);
2074 break;
2076 case REQ_VIEW_BLOB:
2077 if (!ref_blob[0]) {
2078 report("No file chosen, press 't' to open tree view");
2079 break;
2080 }
2081 /* Fall-through */
2082 case REQ_VIEW_MAIN:
2083 case REQ_VIEW_DIFF:
2084 case REQ_VIEW_LOG:
2085 case REQ_VIEW_TREE:
2086 case REQ_VIEW_HELP:
2087 case REQ_VIEW_PAGER:
2088 open_view(view, request, OPEN_DEFAULT);
2089 break;
2091 case REQ_NEXT:
2092 case REQ_PREVIOUS:
2093 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2095 if ((view == VIEW(REQ_VIEW_DIFF) &&
2096 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2097 (view == VIEW(REQ_VIEW_BLOB) &&
2098 view->parent == VIEW(REQ_VIEW_TREE))) {
2099 view = view->parent;
2100 move_view(view, request);
2101 if (view_is_displayed(view))
2102 update_view_title(view);
2103 } else {
2104 move_view(view, request);
2105 break;
2106 }
2107 /* Fall-through */
2109 case REQ_ENTER:
2110 if (!view->lines) {
2111 report("Nothing to enter");
2112 break;
2113 }
2114 return view->ops->enter(view, &view->line[view->lineno]);
2116 case REQ_VIEW_NEXT:
2117 {
2118 int nviews = displayed_views();
2119 int next_view = (current_view + 1) % nviews;
2121 if (next_view == current_view) {
2122 report("Only one view is displayed");
2123 break;
2124 }
2126 current_view = next_view;
2127 /* Blur out the title of the previous view. */
2128 update_view_title(view);
2129 report("");
2130 break;
2131 }
2132 case REQ_TOGGLE_LINENO:
2133 opt_line_number = !opt_line_number;
2134 redraw_display();
2135 break;
2137 case REQ_TOGGLE_REV_GRAPH:
2138 opt_rev_graph = !opt_rev_graph;
2139 redraw_display();
2140 break;
2142 case REQ_PROMPT:
2143 /* Always reload^Wrerun commands from the prompt. */
2144 open_view(view, opt_request, OPEN_RELOAD);
2145 break;
2147 case REQ_SEARCH:
2148 case REQ_SEARCH_BACK:
2149 search_view(view, request);
2150 break;
2152 case REQ_FIND_NEXT:
2153 case REQ_FIND_PREV:
2154 find_next(view, request);
2155 break;
2157 case REQ_STOP_LOADING:
2158 for (i = 0; i < ARRAY_SIZE(views); i++) {
2159 view = &views[i];
2160 if (view->pipe)
2161 report("Stopped loading the %s view", view->name),
2162 end_update(view);
2163 }
2164 break;
2166 case REQ_SHOW_VERSION:
2167 report("%s (built %s)", VERSION, __DATE__);
2168 return TRUE;
2170 case REQ_SCREEN_RESIZE:
2171 resize_display();
2172 /* Fall-through */
2173 case REQ_SCREEN_REDRAW:
2174 redraw_display();
2175 break;
2177 case REQ_NONE:
2178 doupdate();
2179 return TRUE;
2181 case REQ_VIEW_CLOSE:
2182 /* XXX: Mark closed views by letting view->parent point to the
2183 * view itself. Parents to closed view should never be
2184 * followed. */
2185 if (view->parent &&
2186 view->parent->parent != view->parent) {
2187 memset(display, 0, sizeof(display));
2188 current_view = 0;
2189 display[current_view] = view->parent;
2190 view->parent = view;
2191 resize_display();
2192 redraw_display();
2193 break;
2194 }
2195 /* Fall-through */
2196 case REQ_QUIT:
2197 return FALSE;
2199 default:
2200 /* An unknown key will show most commonly used commands. */
2201 report("Unknown key, press 'h' for help");
2202 return TRUE;
2203 }
2205 return TRUE;
2206 }
2209 /*
2210 * Pager backend
2211 */
2213 static bool
2214 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2215 {
2216 char *text = line->data;
2217 enum line_type type = line->type;
2218 int textlen = strlen(text);
2219 int attr;
2221 wmove(view->win, lineno, 0);
2223 if (selected) {
2224 type = LINE_CURSOR;
2225 wchgat(view->win, -1, 0, type, NULL);
2226 }
2228 attr = get_line_attr(type);
2229 wattrset(view->win, attr);
2231 if (opt_line_number || opt_tab_size < TABSIZE) {
2232 static char spaces[] = " ";
2233 int col_offset = 0, col = 0;
2235 if (opt_line_number) {
2236 unsigned long real_lineno = view->offset + lineno + 1;
2238 if (real_lineno == 1 ||
2239 (real_lineno % opt_num_interval) == 0) {
2240 wprintw(view->win, "%.*d", view->digits, real_lineno);
2242 } else {
2243 waddnstr(view->win, spaces,
2244 MIN(view->digits, STRING_SIZE(spaces)));
2245 }
2246 waddstr(view->win, ": ");
2247 col_offset = view->digits + 2;
2248 }
2250 while (text && col_offset + col < view->width) {
2251 int cols_max = view->width - col_offset - col;
2252 char *pos = text;
2253 int cols;
2255 if (*text == '\t') {
2256 text++;
2257 assert(sizeof(spaces) > TABSIZE);
2258 pos = spaces;
2259 cols = opt_tab_size - (col % opt_tab_size);
2261 } else {
2262 text = strchr(text, '\t');
2263 cols = line ? text - pos : strlen(pos);
2264 }
2266 waddnstr(view->win, pos, MIN(cols, cols_max));
2267 col += cols;
2268 }
2270 } else {
2271 int col = 0, pos = 0;
2273 for (; pos < textlen && col < view->width; pos++, col++)
2274 if (text[pos] == '\t')
2275 col += TABSIZE - (col % TABSIZE) - 1;
2277 waddnstr(view->win, text, pos);
2278 }
2280 return TRUE;
2281 }
2283 static bool
2284 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2285 {
2286 char refbuf[SIZEOF_STR];
2287 char *ref = NULL;
2288 FILE *pipe;
2290 if (!string_format(refbuf, "git describe %s", commit_id))
2291 return TRUE;
2293 pipe = popen(refbuf, "r");
2294 if (!pipe)
2295 return TRUE;
2297 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2298 ref = chomp_string(ref);
2299 pclose(pipe);
2301 if (!ref || !*ref)
2302 return TRUE;
2304 /* This is the only fatal call, since it can "corrupt" the buffer. */
2305 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2306 return FALSE;
2308 return TRUE;
2309 }
2311 static void
2312 add_pager_refs(struct view *view, struct line *line)
2313 {
2314 char buf[SIZEOF_STR];
2315 char *commit_id = line->data + STRING_SIZE("commit ");
2316 struct ref **refs;
2317 size_t bufpos = 0, refpos = 0;
2318 const char *sep = "Refs: ";
2319 bool is_tag = FALSE;
2321 assert(line->type == LINE_COMMIT);
2323 refs = get_refs(commit_id);
2324 if (!refs) {
2325 if (view == VIEW(REQ_VIEW_DIFF))
2326 goto try_add_describe_ref;
2327 return;
2328 }
2330 do {
2331 struct ref *ref = refs[refpos];
2332 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2334 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2335 return;
2336 sep = ", ";
2337 if (ref->tag)
2338 is_tag = TRUE;
2339 } while (refs[refpos++]->next);
2341 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2342 try_add_describe_ref:
2343 /* Add <tag>-g<commit_id> "fake" reference. */
2344 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2345 return;
2346 }
2348 if (bufpos == 0)
2349 return;
2351 if (!realloc_lines(view, view->line_size + 1))
2352 return;
2354 line = &view->line[view->lines];
2355 line->data = strdup(buf);
2356 if (!line->data)
2357 return;
2359 line->type = LINE_PP_REFS;
2360 view->lines++;
2361 }
2363 static bool
2364 pager_read(struct view *view, char *data)
2365 {
2366 struct line *line = &view->line[view->lines];
2368 line->data = strdup(data);
2369 if (!line->data)
2370 return FALSE;
2372 line->type = get_line_type(line->data);
2373 view->lines++;
2375 if (line->type == LINE_COMMIT &&
2376 (view == VIEW(REQ_VIEW_DIFF) ||
2377 view == VIEW(REQ_VIEW_LOG)))
2378 add_pager_refs(view, line);
2380 return TRUE;
2381 }
2383 static bool
2384 pager_enter(struct view *view, struct line *line)
2385 {
2386 int split = 0;
2388 if (line->type == LINE_COMMIT &&
2389 (view == VIEW(REQ_VIEW_LOG) ||
2390 view == VIEW(REQ_VIEW_PAGER))) {
2391 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2392 split = 1;
2393 }
2395 /* Always scroll the view even if it was split. That way
2396 * you can use Enter to scroll through the log view and
2397 * split open each commit diff. */
2398 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2400 /* FIXME: A minor workaround. Scrolling the view will call report("")
2401 * but if we are scrolling a non-current view this won't properly
2402 * update the view title. */
2403 if (split)
2404 update_view_title(view);
2406 return TRUE;
2407 }
2409 static bool
2410 pager_grep(struct view *view, struct line *line)
2411 {
2412 regmatch_t pmatch;
2413 char *text = line->data;
2415 if (!*text)
2416 return FALSE;
2418 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2419 return FALSE;
2421 return TRUE;
2422 }
2424 static void
2425 pager_select(struct view *view, struct line *line)
2426 {
2427 if (line->type == LINE_COMMIT) {
2428 char *text = line->data;
2430 string_copy(view->ref, text + STRING_SIZE("commit "));
2431 string_copy(ref_commit, view->ref);
2432 }
2433 }
2435 static struct view_ops pager_ops = {
2436 "line",
2437 pager_draw,
2438 pager_read,
2439 pager_enter,
2440 pager_grep,
2441 pager_select,
2442 };
2445 /*
2446 * Tree backend
2447 */
2449 /* Parse output from git-ls-tree(1):
2450 *
2451 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2452 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2453 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2454 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2455 */
2457 #define SIZEOF_TREE_ATTR \
2458 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2460 #define TREE_UP_FORMAT "040000 tree %s\t.."
2462 static int
2463 tree_compare_entry(enum line_type type1, char *name1,
2464 enum line_type type2, char *name2)
2465 {
2466 if (type1 != type2) {
2467 if (type1 == LINE_TREE_DIR)
2468 return -1;
2469 return 1;
2470 }
2472 return strcmp(name1, name2);
2473 }
2475 static bool
2476 tree_read(struct view *view, char *text)
2477 {
2478 size_t textlen = strlen(text);
2479 char buf[SIZEOF_STR];
2480 unsigned long pos;
2481 enum line_type type;
2482 bool first_read = view->lines == 0;
2484 if (textlen <= SIZEOF_TREE_ATTR)
2485 return FALSE;
2487 type = text[STRING_SIZE("100644 ")] == 't'
2488 ? LINE_TREE_DIR : LINE_TREE_FILE;
2490 if (first_read) {
2491 /* Add path info line */
2492 if (string_format(buf, "Directory path /%s", opt_path) &&
2493 realloc_lines(view, view->line_size + 1) &&
2494 pager_read(view, buf))
2495 view->line[view->lines - 1].type = LINE_DEFAULT;
2496 else
2497 return FALSE;
2499 /* Insert "link" to parent directory. */
2500 if (*opt_path &&
2501 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2502 realloc_lines(view, view->line_size + 1) &&
2503 pager_read(view, buf))
2504 view->line[view->lines - 1].type = LINE_TREE_DIR;
2505 else if (*opt_path)
2506 return FALSE;
2507 }
2509 /* Strip the path part ... */
2510 if (*opt_path) {
2511 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2512 size_t striplen = strlen(opt_path);
2513 char *path = text + SIZEOF_TREE_ATTR;
2515 if (pathlen > striplen)
2516 memmove(path, path + striplen,
2517 pathlen - striplen + 1);
2518 }
2520 /* Skip "Directory ..." and ".." line. */
2521 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2522 struct line *line = &view->line[pos];
2523 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2524 char *path2 = text + SIZEOF_TREE_ATTR;
2525 int cmp = tree_compare_entry(line->type, path1, type, path2);
2527 if (cmp <= 0)
2528 continue;
2530 text = strdup(text);
2531 if (!text)
2532 return FALSE;
2534 if (view->lines > pos)
2535 memmove(&view->line[pos + 1], &view->line[pos],
2536 (view->lines - pos) * sizeof(*line));
2538 line = &view->line[pos];
2539 line->data = text;
2540 line->type = type;
2541 view->lines++;
2542 return TRUE;
2543 }
2545 if (!pager_read(view, text))
2546 return FALSE;
2548 /* Move the current line to the first tree entry. */
2549 if (first_read)
2550 view->lineno++;
2552 view->line[view->lines - 1].type = type;
2553 return TRUE;
2554 }
2556 static bool
2557 tree_enter(struct view *view, struct line *line)
2558 {
2559 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2560 enum request request;
2562 switch (line->type) {
2563 case LINE_TREE_DIR:
2564 /* Depending on whether it is a subdir or parent (updir?) link
2565 * mangle the path buffer. */
2566 if (line == &view->line[1] && *opt_path) {
2567 size_t path_len = strlen(opt_path);
2568 char *dirsep = opt_path + path_len - 1;
2570 while (dirsep > opt_path && dirsep[-1] != '/')
2571 dirsep--;
2573 dirsep[0] = 0;
2575 } else {
2576 size_t pathlen = strlen(opt_path);
2577 size_t origlen = pathlen;
2578 char *data = line->data;
2579 char *basename = data + SIZEOF_TREE_ATTR;
2581 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2582 opt_path[origlen] = 0;
2583 return TRUE;
2584 }
2585 }
2587 /* Trees and subtrees share the same ID, so they are not not
2588 * unique like blobs. */
2589 flags |= OPEN_RELOAD;
2590 request = REQ_VIEW_TREE;
2591 break;
2593 case LINE_TREE_FILE:
2594 request = REQ_VIEW_BLOB;
2595 break;
2597 default:
2598 return TRUE;
2599 }
2601 open_view(view, request, flags);
2603 return TRUE;
2604 }
2606 static void
2607 tree_select(struct view *view, struct line *line)
2608 {
2609 char *text = line->data;
2611 text += STRING_SIZE("100644 blob ");
2613 if (line->type == LINE_TREE_FILE) {
2614 string_ncopy(ref_blob, text, 40);
2615 /* Also update the blob view's ref, since all there must always
2616 * be in sync. */
2617 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2619 } else if (line->type != LINE_TREE_DIR) {
2620 return;
2621 }
2623 string_ncopy(view->ref, text, 40);
2624 }
2626 static struct view_ops tree_ops = {
2627 "file",
2628 pager_draw,
2629 tree_read,
2630 tree_enter,
2631 pager_grep,
2632 tree_select,
2633 };
2635 static bool
2636 blob_read(struct view *view, char *line)
2637 {
2638 bool state = pager_read(view, line);
2640 if (state == TRUE)
2641 view->line[view->lines - 1].type = LINE_DEFAULT;
2643 return state;
2644 }
2646 static struct view_ops blob_ops = {
2647 "line",
2648 pager_draw,
2649 blob_read,
2650 pager_enter,
2651 pager_grep,
2652 pager_select,
2653 };
2656 /*
2657 * Main view backend
2658 */
2660 struct commit {
2661 char id[SIZEOF_REV]; /* SHA1 ID. */
2662 char title[75]; /* First line of the commit message. */
2663 char author[75]; /* Author of the commit. */
2664 struct tm time; /* Date from the author ident. */
2665 struct ref **refs; /* Repository references. */
2666 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2667 size_t graph_size; /* The width of the graph array. */
2668 };
2670 static bool
2671 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2672 {
2673 char buf[DATE_COLS + 1];
2674 struct commit *commit = line->data;
2675 enum line_type type;
2676 int col = 0;
2677 size_t timelen;
2678 size_t authorlen;
2679 int trimmed = 1;
2681 if (!*commit->author)
2682 return FALSE;
2684 wmove(view->win, lineno, col);
2686 if (selected) {
2687 type = LINE_CURSOR;
2688 wattrset(view->win, get_line_attr(type));
2689 wchgat(view->win, -1, 0, type, NULL);
2691 } else {
2692 type = LINE_MAIN_COMMIT;
2693 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2694 }
2696 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2697 waddnstr(view->win, buf, timelen);
2698 waddstr(view->win, " ");
2700 col += DATE_COLS;
2701 wmove(view->win, lineno, col);
2702 if (type != LINE_CURSOR)
2703 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2705 if (opt_utf8) {
2706 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2707 } else {
2708 authorlen = strlen(commit->author);
2709 if (authorlen > AUTHOR_COLS - 2) {
2710 authorlen = AUTHOR_COLS - 2;
2711 trimmed = 1;
2712 }
2713 }
2715 if (trimmed) {
2716 waddnstr(view->win, commit->author, authorlen);
2717 if (type != LINE_CURSOR)
2718 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2719 waddch(view->win, '~');
2720 } else {
2721 waddstr(view->win, commit->author);
2722 }
2724 col += AUTHOR_COLS;
2725 if (type != LINE_CURSOR)
2726 wattrset(view->win, A_NORMAL);
2728 if (opt_rev_graph && commit->graph_size) {
2729 size_t i;
2731 wmove(view->win, lineno, col);
2732 /* Using waddch() instead of waddnstr() ensures that
2733 * they'll be rendered correctly for the cursor line. */
2734 for (i = 0; i < commit->graph_size; i++)
2735 waddch(view->win, commit->graph[i]);
2737 col += commit->graph_size + 1;
2738 }
2740 wmove(view->win, lineno, col);
2742 if (commit->refs) {
2743 size_t i = 0;
2745 do {
2746 if (type == LINE_CURSOR)
2747 ;
2748 else if (commit->refs[i]->tag)
2749 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2750 else
2751 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2752 waddstr(view->win, "[");
2753 waddstr(view->win, commit->refs[i]->name);
2754 waddstr(view->win, "]");
2755 if (type != LINE_CURSOR)
2756 wattrset(view->win, A_NORMAL);
2757 waddstr(view->win, " ");
2758 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2759 } while (commit->refs[i++]->next);
2760 }
2762 if (type != LINE_CURSOR)
2763 wattrset(view->win, get_line_attr(type));
2765 {
2766 int titlelen = strlen(commit->title);
2768 if (col + titlelen > view->width)
2769 titlelen = view->width - col;
2771 waddnstr(view->win, commit->title, titlelen);
2772 }
2774 return TRUE;
2775 }
2777 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2778 static bool
2779 main_read(struct view *view, char *line)
2780 {
2781 enum line_type type = get_line_type(line);
2782 struct commit *commit = view->lines
2783 ? view->line[view->lines - 1].data : NULL;
2785 switch (type) {
2786 case LINE_COMMIT:
2787 commit = calloc(1, sizeof(struct commit));
2788 if (!commit)
2789 return FALSE;
2791 line += STRING_SIZE("commit ");
2793 view->line[view->lines++].data = commit;
2794 string_copy(commit->id, line);
2795 commit->refs = get_refs(commit->id);
2796 commit->graph[commit->graph_size++] = ACS_LTEE;
2797 break;
2799 case LINE_AUTHOR:
2800 {
2801 char *ident = line + STRING_SIZE("author ");
2802 char *end = strchr(ident, '<');
2804 if (!commit)
2805 break;
2807 if (end) {
2808 char *email = end + 1;
2810 for (; end > ident && isspace(end[-1]); end--) ;
2812 if (end == ident && *email) {
2813 ident = email;
2814 end = strchr(ident, '>');
2815 for (; end > ident && isspace(end[-1]); end--) ;
2816 }
2817 *end = 0;
2818 }
2820 /* End is NULL or ident meaning there's no author. */
2821 if (end <= ident)
2822 ident = "Unknown";
2824 string_copy(commit->author, ident);
2826 /* Parse epoch and timezone */
2827 if (end) {
2828 char *secs = strchr(end + 1, '>');
2829 char *zone;
2830 time_t time;
2832 if (!secs || secs[1] != ' ')
2833 break;
2835 secs += 2;
2836 time = (time_t) atol(secs);
2837 zone = strchr(secs, ' ');
2838 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2839 long tz;
2841 zone++;
2842 tz = ('0' - zone[1]) * 60 * 60 * 10;
2843 tz += ('0' - zone[2]) * 60 * 60;
2844 tz += ('0' - zone[3]) * 60;
2845 tz += ('0' - zone[4]) * 60;
2847 if (zone[0] == '-')
2848 tz = -tz;
2850 time -= tz;
2851 }
2852 gmtime_r(&time, &commit->time);
2853 }
2854 break;
2855 }
2856 default:
2857 if (!commit)
2858 break;
2860 /* Fill in the commit title if it has not already been set. */
2861 if (commit->title[0])
2862 break;
2864 /* Require titles to start with a non-space character at the
2865 * offset used by git log. */
2866 /* FIXME: More gracefull handling of titles; append "..." to
2867 * shortened titles, etc. */
2868 if (strncmp(line, " ", 4) ||
2869 isspace(line[4]))
2870 break;
2872 string_copy(commit->title, line + 4);
2873 }
2875 return TRUE;
2876 }
2878 static bool
2879 main_enter(struct view *view, struct line *line)
2880 {
2881 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2883 open_view(view, REQ_VIEW_DIFF, flags);
2884 return TRUE;
2885 }
2887 static bool
2888 main_grep(struct view *view, struct line *line)
2889 {
2890 struct commit *commit = line->data;
2891 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2892 char buf[DATE_COLS + 1];
2893 regmatch_t pmatch;
2895 for (state = S_TITLE; state < S_END; state++) {
2896 char *text;
2898 switch (state) {
2899 case S_TITLE: text = commit->title; break;
2900 case S_AUTHOR: text = commit->author; break;
2901 case S_DATE:
2902 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2903 continue;
2904 text = buf;
2905 break;
2907 default:
2908 return FALSE;
2909 }
2911 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
2912 return TRUE;
2913 }
2915 return FALSE;
2916 }
2918 static void
2919 main_select(struct view *view, struct line *line)
2920 {
2921 struct commit *commit = line->data;
2923 string_copy(view->ref, commit->id);
2924 string_copy(ref_commit, view->ref);
2925 }
2927 static struct view_ops main_ops = {
2928 "commit",
2929 main_draw,
2930 main_read,
2931 main_enter,
2932 main_grep,
2933 main_select,
2934 };
2937 /*
2938 * Unicode / UTF-8 handling
2939 *
2940 * NOTE: Much of the following code for dealing with unicode is derived from
2941 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2942 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2943 */
2945 /* I've (over)annotated a lot of code snippets because I am not entirely
2946 * confident that the approach taken by this small UTF-8 interface is correct.
2947 * --jonas */
2949 static inline int
2950 unicode_width(unsigned long c)
2951 {
2952 if (c >= 0x1100 &&
2953 (c <= 0x115f /* Hangul Jamo */
2954 || c == 0x2329
2955 || c == 0x232a
2956 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2957 /* CJK ... Yi */
2958 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2959 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2960 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2961 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2962 || (c >= 0xffe0 && c <= 0xffe6)
2963 || (c >= 0x20000 && c <= 0x2fffd)
2964 || (c >= 0x30000 && c <= 0x3fffd)))
2965 return 2;
2967 return 1;
2968 }
2970 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2971 * Illegal bytes are set one. */
2972 static const unsigned char utf8_bytes[256] = {
2973 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,
2974 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,
2975 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,
2976 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,
2977 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,
2978 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,
2979 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,
2980 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,
2981 };
2983 /* Decode UTF-8 multi-byte representation into a unicode character. */
2984 static inline unsigned long
2985 utf8_to_unicode(const char *string, size_t length)
2986 {
2987 unsigned long unicode;
2989 switch (length) {
2990 case 1:
2991 unicode = string[0];
2992 break;
2993 case 2:
2994 unicode = (string[0] & 0x1f) << 6;
2995 unicode += (string[1] & 0x3f);
2996 break;
2997 case 3:
2998 unicode = (string[0] & 0x0f) << 12;
2999 unicode += ((string[1] & 0x3f) << 6);
3000 unicode += (string[2] & 0x3f);
3001 break;
3002 case 4:
3003 unicode = (string[0] & 0x0f) << 18;
3004 unicode += ((string[1] & 0x3f) << 12);
3005 unicode += ((string[2] & 0x3f) << 6);
3006 unicode += (string[3] & 0x3f);
3007 break;
3008 case 5:
3009 unicode = (string[0] & 0x0f) << 24;
3010 unicode += ((string[1] & 0x3f) << 18);
3011 unicode += ((string[2] & 0x3f) << 12);
3012 unicode += ((string[3] & 0x3f) << 6);
3013 unicode += (string[4] & 0x3f);
3014 break;
3015 case 6:
3016 unicode = (string[0] & 0x01) << 30;
3017 unicode += ((string[1] & 0x3f) << 24);
3018 unicode += ((string[2] & 0x3f) << 18);
3019 unicode += ((string[3] & 0x3f) << 12);
3020 unicode += ((string[4] & 0x3f) << 6);
3021 unicode += (string[5] & 0x3f);
3022 break;
3023 default:
3024 die("Invalid unicode length");
3025 }
3027 /* Invalid characters could return the special 0xfffd value but NUL
3028 * should be just as good. */
3029 return unicode > 0xffff ? 0 : unicode;
3030 }
3032 /* Calculates how much of string can be shown within the given maximum width
3033 * and sets trimmed parameter to non-zero value if all of string could not be
3034 * shown.
3035 *
3036 * Additionally, adds to coloffset how many many columns to move to align with
3037 * the expected position. Takes into account how multi-byte and double-width
3038 * characters will effect the cursor position.
3039 *
3040 * Returns the number of bytes to output from string to satisfy max_width. */
3041 static size_t
3042 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3043 {
3044 const char *start = string;
3045 const char *end = strchr(string, '\0');
3046 size_t mbwidth = 0;
3047 size_t width = 0;
3049 *trimmed = 0;
3051 while (string < end) {
3052 int c = *(unsigned char *) string;
3053 unsigned char bytes = utf8_bytes[c];
3054 size_t ucwidth;
3055 unsigned long unicode;
3057 if (string + bytes > end)
3058 break;
3060 /* Change representation to figure out whether
3061 * it is a single- or double-width character. */
3063 unicode = utf8_to_unicode(string, bytes);
3064 /* FIXME: Graceful handling of invalid unicode character. */
3065 if (!unicode)
3066 break;
3068 ucwidth = unicode_width(unicode);
3069 width += ucwidth;
3070 if (width > max_width) {
3071 *trimmed = 1;
3072 break;
3073 }
3075 /* The column offset collects the differences between the
3076 * number of bytes encoding a character and the number of
3077 * columns will be used for rendering said character.
3078 *
3079 * So if some character A is encoded in 2 bytes, but will be
3080 * represented on the screen using only 1 byte this will and up
3081 * adding 1 to the multi-byte column offset.
3082 *
3083 * Assumes that no double-width character can be encoding in
3084 * less than two bytes. */
3085 if (bytes > ucwidth)
3086 mbwidth += bytes - ucwidth;
3088 string += bytes;
3089 }
3091 *coloffset += mbwidth;
3093 return string - start;
3094 }
3097 /*
3098 * Status management
3099 */
3101 /* Whether or not the curses interface has been initialized. */
3102 static bool cursed = FALSE;
3104 /* The status window is used for polling keystrokes. */
3105 static WINDOW *status_win;
3107 /* Update status and title window. */
3108 static void
3109 report(const char *msg, ...)
3110 {
3111 static bool empty = TRUE;
3112 struct view *view = display[current_view];
3114 if (!empty || *msg) {
3115 va_list args;
3117 va_start(args, msg);
3119 werase(status_win);
3120 wmove(status_win, 0, 0);
3121 if (*msg) {
3122 vwprintw(status_win, msg, args);
3123 empty = FALSE;
3124 } else {
3125 empty = TRUE;
3126 }
3127 wrefresh(status_win);
3129 va_end(args);
3130 }
3132 update_view_title(view);
3133 update_display_cursor(view);
3134 }
3136 /* Controls when nodelay should be in effect when polling user input. */
3137 static void
3138 set_nonblocking_input(bool loading)
3139 {
3140 static unsigned int loading_views;
3142 if ((loading == FALSE && loading_views-- == 1) ||
3143 (loading == TRUE && loading_views++ == 0))
3144 nodelay(status_win, loading);
3145 }
3147 static void
3148 init_display(void)
3149 {
3150 int x, y;
3152 /* Initialize the curses library */
3153 if (isatty(STDIN_FILENO)) {
3154 cursed = !!initscr();
3155 } else {
3156 /* Leave stdin and stdout alone when acting as a pager. */
3157 FILE *io = fopen("/dev/tty", "r+");
3159 if (!io)
3160 die("Failed to open /dev/tty");
3161 cursed = !!newterm(NULL, io, io);
3162 }
3164 if (!cursed)
3165 die("Failed to initialize curses");
3167 nonl(); /* Tell curses not to do NL->CR/NL on output */
3168 cbreak(); /* Take input chars one at a time, no wait for \n */
3169 noecho(); /* Don't echo input */
3170 leaveok(stdscr, TRUE);
3172 if (has_colors())
3173 init_colors();
3175 getmaxyx(stdscr, y, x);
3176 status_win = newwin(1, 0, y - 1, 0);
3177 if (!status_win)
3178 die("Failed to create status window");
3180 /* Enable keyboard mapping */
3181 keypad(status_win, TRUE);
3182 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3183 }
3185 static char *
3186 read_prompt(const char *prompt)
3187 {
3188 enum { READING, STOP, CANCEL } status = READING;
3189 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3190 int pos = 0;
3192 while (status == READING) {
3193 struct view *view;
3194 int i, key;
3196 foreach_view (view, i)
3197 update_view(view);
3199 report("%s%.*s", prompt, pos, buf);
3200 /* Refresh, accept single keystroke of input */
3201 key = wgetch(status_win);
3202 switch (key) {
3203 case KEY_RETURN:
3204 case KEY_ENTER:
3205 case '\n':
3206 status = pos ? STOP : CANCEL;
3207 break;
3209 case KEY_BACKSPACE:
3210 if (pos > 0)
3211 pos--;
3212 else
3213 status = CANCEL;
3214 break;
3216 case KEY_ESC:
3217 status = CANCEL;
3218 break;
3220 case ERR:
3221 break;
3223 default:
3224 if (pos >= sizeof(buf)) {
3225 report("Input string too long");
3226 return NULL;
3227 }
3229 if (isprint(key))
3230 buf[pos++] = (char) key;
3231 }
3232 }
3234 if (status == CANCEL) {
3235 /* Clear the status window */
3236 report("");
3237 return NULL;
3238 }
3240 buf[pos++] = 0;
3242 return buf;
3243 }
3245 /*
3246 * Repository references
3247 */
3249 static struct ref *refs;
3250 static size_t refs_size;
3252 /* Id <-> ref store */
3253 static struct ref ***id_refs;
3254 static size_t id_refs_size;
3256 static struct ref **
3257 get_refs(char *id)
3258 {
3259 struct ref ***tmp_id_refs;
3260 struct ref **ref_list = NULL;
3261 size_t ref_list_size = 0;
3262 size_t i;
3264 for (i = 0; i < id_refs_size; i++)
3265 if (!strcmp(id, id_refs[i][0]->id))
3266 return id_refs[i];
3268 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3269 if (!tmp_id_refs)
3270 return NULL;
3272 id_refs = tmp_id_refs;
3274 for (i = 0; i < refs_size; i++) {
3275 struct ref **tmp;
3277 if (strcmp(id, refs[i].id))
3278 continue;
3280 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3281 if (!tmp) {
3282 if (ref_list)
3283 free(ref_list);
3284 return NULL;
3285 }
3287 ref_list = tmp;
3288 if (ref_list_size > 0)
3289 ref_list[ref_list_size - 1]->next = 1;
3290 ref_list[ref_list_size] = &refs[i];
3292 /* XXX: The properties of the commit chains ensures that we can
3293 * safely modify the shared ref. The repo references will
3294 * always be similar for the same id. */
3295 ref_list[ref_list_size]->next = 0;
3296 ref_list_size++;
3297 }
3299 if (ref_list)
3300 id_refs[id_refs_size++] = ref_list;
3302 return ref_list;
3303 }
3305 static int
3306 read_ref(char *id, int idlen, char *name, int namelen)
3307 {
3308 struct ref *ref;
3309 bool tag = FALSE;
3311 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3312 /* Commits referenced by tags has "^{}" appended. */
3313 if (name[namelen - 1] != '}')
3314 return OK;
3316 while (namelen > 0 && name[namelen] != '^')
3317 namelen--;
3319 tag = TRUE;
3320 namelen -= STRING_SIZE("refs/tags/");
3321 name += STRING_SIZE("refs/tags/");
3323 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3324 namelen -= STRING_SIZE("refs/heads/");
3325 name += STRING_SIZE("refs/heads/");
3327 } else if (!strcmp(name, "HEAD")) {
3328 return OK;
3329 }
3331 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3332 if (!refs)
3333 return ERR;
3335 ref = &refs[refs_size++];
3336 ref->name = malloc(namelen + 1);
3337 if (!ref->name)
3338 return ERR;
3340 strncpy(ref->name, name, namelen);
3341 ref->name[namelen] = 0;
3342 ref->tag = tag;
3343 string_copy(ref->id, id);
3345 return OK;
3346 }
3348 static int
3349 load_refs(void)
3350 {
3351 const char *cmd_env = getenv("TIG_LS_REMOTE");
3352 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3354 return read_properties(popen(cmd, "r"), "\t", read_ref);
3355 }
3357 static int
3358 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3359 {
3360 if (!strcmp(name, "i18n.commitencoding"))
3361 string_copy(opt_encoding, value);
3363 return OK;
3364 }
3366 static int
3367 load_repo_config(void)
3368 {
3369 return read_properties(popen("git repo-config --list", "r"),
3370 "=", read_repo_config_option);
3371 }
3373 static int
3374 read_properties(FILE *pipe, const char *separators,
3375 int (*read_property)(char *, int, char *, int))
3376 {
3377 char buffer[BUFSIZ];
3378 char *name;
3379 int state = OK;
3381 if (!pipe)
3382 return ERR;
3384 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3385 char *value;
3386 size_t namelen;
3387 size_t valuelen;
3389 name = chomp_string(name);
3390 namelen = strcspn(name, separators);
3392 if (name[namelen]) {
3393 name[namelen] = 0;
3394 value = chomp_string(name + namelen + 1);
3395 valuelen = strlen(value);
3397 } else {
3398 value = "";
3399 valuelen = 0;
3400 }
3402 state = read_property(name, namelen, value, valuelen);
3403 }
3405 if (state != ERR && ferror(pipe))
3406 state = ERR;
3408 pclose(pipe);
3410 return state;
3411 }
3414 /*
3415 * Main
3416 */
3418 static void __NORETURN
3419 quit(int sig)
3420 {
3421 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3422 if (cursed)
3423 endwin();
3424 exit(0);
3425 }
3427 static void __NORETURN
3428 die(const char *err, ...)
3429 {
3430 va_list args;
3432 endwin();
3434 va_start(args, err);
3435 fputs("tig: ", stderr);
3436 vfprintf(stderr, err, args);
3437 fputs("\n", stderr);
3438 va_end(args);
3440 exit(1);
3441 }
3443 int
3444 main(int argc, char *argv[])
3445 {
3446 struct view *view;
3447 enum request request;
3448 size_t i;
3450 signal(SIGINT, quit);
3452 if (setlocale(LC_ALL, "")) {
3453 string_copy(opt_codeset, nl_langinfo(CODESET));
3454 }
3456 if (load_options() == ERR)
3457 die("Failed to load user config.");
3459 /* Load the repo config file so options can be overwritten from
3460 * the command line. */
3461 if (load_repo_config() == ERR)
3462 die("Failed to load repo config.");
3464 if (!parse_options(argc, argv))
3465 return 0;
3467 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3468 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3469 if (opt_iconv == ICONV_NONE)
3470 die("Failed to initialize character set conversion");
3471 }
3473 if (load_refs() == ERR)
3474 die("Failed to load refs.");
3476 /* Require a git repository unless when running in pager mode. */
3477 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3478 die("Not a git repository");
3480 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3481 view->cmd_env = getenv(view->cmd_env);
3483 request = opt_request;
3485 init_display();
3487 while (view_driver(display[current_view], request)) {
3488 int key;
3489 int i;
3491 foreach_view (view, i)
3492 update_view(view);
3494 /* Refresh, accept single keystroke of input */
3495 key = wgetch(status_win);
3497 request = get_keybinding(display[current_view]->keymap, key);
3499 /* Some low-level request handling. This keeps access to
3500 * status_win restricted. */
3501 switch (request) {
3502 case REQ_PROMPT:
3503 {
3504 char *cmd = read_prompt(":");
3506 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3507 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3508 opt_request = REQ_VIEW_DIFF;
3509 } else {
3510 opt_request = REQ_VIEW_PAGER;
3511 }
3512 break;
3513 }
3515 request = REQ_NONE;
3516 break;
3517 }
3518 case REQ_SEARCH:
3519 case REQ_SEARCH_BACK:
3520 {
3521 const char *prompt = request == REQ_SEARCH
3522 ? "/" : "?";
3523 char *search = read_prompt(prompt);
3525 if (search)
3526 string_copy(opt_search, search);
3527 else
3528 request = REQ_NONE;
3529 break;
3530 }
3531 case REQ_SCREEN_RESIZE:
3532 {
3533 int height, width;
3535 getmaxyx(stdscr, height, width);
3537 /* Resize the status view and let the view driver take
3538 * care of resizing the displayed views. */
3539 wresize(status_win, 1, width);
3540 mvwin(status_win, height - 1, 0);
3541 wrefresh(status_win);
3542 break;
3543 }
3544 default:
3545 break;
3546 }
3547 }
3549 quit(0);
3551 return 0;
3552 }