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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-0.5.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, "log") ||
455 !strcmp(opt, "diff") ||
456 !strcmp(opt, "show")) {
457 opt_request = opt[0] == 'l'
458 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
459 break;
460 }
462 if (opt[0] && opt[0] != '-')
463 break;
465 if (!strcmp(opt, "-l")) {
466 opt_request = REQ_VIEW_LOG;
467 continue;
468 }
470 if (!strcmp(opt, "-d")) {
471 opt_request = REQ_VIEW_DIFF;
472 continue;
473 }
475 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
476 opt_line_number = TRUE;
477 continue;
478 }
480 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
481 opt_tab_size = MIN(opt_tab_size, TABSIZE);
482 continue;
483 }
485 if (check_option(opt, 'v', "version", OPT_NONE)) {
486 printf("tig version %s\n", VERSION);
487 return FALSE;
488 }
490 if (check_option(opt, 'h', "help", OPT_NONE)) {
491 printf(usage);
492 return FALSE;
493 }
495 if (!strcmp(opt, "--")) {
496 i++;
497 break;
498 }
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 /* Reading from the prompt? */
1168 static bool input_mode = FALSE;
1170 #define foreach_displayed_view(view, i) \
1171 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1173 #define displayed_views() (display[1] != NULL ? 2 : 1)
1175 /* Current head and commit ID */
1176 static char ref_blob[SIZEOF_REF] = "";
1177 static char ref_commit[SIZEOF_REF] = "HEAD";
1178 static char ref_head[SIZEOF_REF] = "HEAD";
1180 struct view {
1181 const char *name; /* View name */
1182 const char *cmd_fmt; /* Default command line format */
1183 const char *cmd_env; /* Command line set via environment */
1184 const char *id; /* Points to either of ref_{head,commit,blob} */
1186 struct view_ops *ops; /* View operations */
1188 enum keymap keymap; /* What keymap does this view have */
1190 char cmd[SIZEOF_STR]; /* Command buffer */
1191 char ref[SIZEOF_REF]; /* Hovered commit reference */
1192 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1194 int height, width; /* The width and height of the main window */
1195 WINDOW *win; /* The main window */
1196 WINDOW *title; /* The title window living below the main window */
1198 /* Navigation */
1199 unsigned long offset; /* Offset of the window top */
1200 unsigned long lineno; /* Current line number */
1202 /* Searching */
1203 char grep[SIZEOF_STR]; /* Search string */
1204 regex_t *regex; /* Pre-compiled regex */
1206 /* If non-NULL, points to the view that opened this view. If this view
1207 * is closed tig will switch back to the parent view. */
1208 struct view *parent;
1210 /* Buffering */
1211 unsigned long lines; /* Total number of lines */
1212 struct line *line; /* Line index */
1213 unsigned long line_size;/* Total number of allocated lines */
1214 unsigned int digits; /* Number of digits in the lines member. */
1216 /* Loading */
1217 FILE *pipe;
1218 time_t start_time;
1219 };
1221 struct view_ops {
1222 /* What type of content being displayed. Used in the title bar. */
1223 const char *type;
1224 /* Draw one line; @lineno must be < view->height. */
1225 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1226 /* Read one line; updates view->line. */
1227 bool (*read)(struct view *view, char *data);
1228 /* Depending on view, change display based on current line. */
1229 bool (*enter)(struct view *view, struct line *line);
1230 /* Search for regex in a line. */
1231 bool (*grep)(struct view *view, struct line *line);
1232 /* Select line */
1233 void (*select)(struct view *view, struct line *line);
1234 };
1236 static struct view_ops pager_ops;
1237 static struct view_ops main_ops;
1238 static struct view_ops tree_ops;
1239 static struct view_ops blob_ops;
1241 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1242 { name, cmd, #env, ref, ops, map}
1244 #define VIEW_(id, name, ops, ref) \
1245 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1248 static struct view views[] = {
1249 VIEW_(MAIN, "main", &main_ops, ref_head),
1250 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1251 VIEW_(LOG, "log", &pager_ops, ref_head),
1252 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1253 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1254 VIEW_(HELP, "help", &pager_ops, "static"),
1255 VIEW_(PAGER, "pager", &pager_ops, "static"),
1256 };
1258 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1260 #define foreach_view(view, i) \
1261 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1263 #define view_is_displayed(view) \
1264 (view == display[0] || view == display[1])
1266 static bool
1267 draw_view_line(struct view *view, unsigned int lineno)
1268 {
1269 struct line *line;
1270 bool selected = (view->offset + lineno == view->lineno);
1271 bool draw_ok;
1273 assert(view_is_displayed(view));
1275 if (view->offset + lineno >= view->lines)
1276 return FALSE;
1278 line = &view->line[view->offset + lineno];
1280 if (selected) {
1281 line->selected = TRUE;
1282 view->ops->select(view, line);
1283 } else if (line->selected) {
1284 line->selected = FALSE;
1285 wmove(view->win, lineno, 0);
1286 wclrtoeol(view->win);
1287 }
1289 scrollok(view->win, FALSE);
1290 draw_ok = view->ops->draw(view, line, lineno, selected);
1291 scrollok(view->win, TRUE);
1293 return draw_ok;
1294 }
1296 static void
1297 redraw_view_from(struct view *view, int lineno)
1298 {
1299 assert(0 <= lineno && lineno < view->height);
1301 for (; lineno < view->height; lineno++) {
1302 if (!draw_view_line(view, lineno))
1303 break;
1304 }
1306 redrawwin(view->win);
1307 if (input_mode)
1308 wnoutrefresh(view->win);
1309 else
1310 wrefresh(view->win);
1311 }
1313 static void
1314 redraw_view(struct view *view)
1315 {
1316 wclear(view->win);
1317 redraw_view_from(view, 0);
1318 }
1321 static void
1322 update_view_title(struct view *view)
1323 {
1324 char buf[SIZEOF_STR];
1325 char state[SIZEOF_STR];
1326 size_t bufpos = 0, statelen = 0;
1328 assert(view_is_displayed(view));
1330 if (view->lines || view->pipe) {
1331 unsigned int view_lines = view->offset + view->height;
1332 unsigned int lines = view->lines
1333 ? MIN(view_lines, view->lines) * 100 / view->lines
1334 : 0;
1336 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1337 view->ops->type,
1338 view->lineno + 1,
1339 view->lines,
1340 lines);
1342 if (view->pipe) {
1343 time_t secs = time(NULL) - view->start_time;
1345 /* Three git seconds are a long time ... */
1346 if (secs > 2)
1347 string_format_from(state, &statelen, " %lds", secs);
1348 }
1349 }
1351 string_format_from(buf, &bufpos, "[%s]", view->name);
1352 if (*view->ref && bufpos < view->width) {
1353 size_t refsize = strlen(view->ref);
1354 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1356 if (minsize < view->width)
1357 refsize = view->width - minsize + 7;
1358 string_format_from(buf, &bufpos, " %.*s", refsize, view->ref);
1359 }
1361 if (statelen && bufpos < view->width) {
1362 string_format_from(buf, &bufpos, " %s", state);
1363 }
1365 if (view == display[current_view])
1366 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1367 else
1368 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1370 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1371 wclrtoeol(view->title);
1372 wmove(view->title, 0, view->width - 1);
1374 if (input_mode)
1375 wnoutrefresh(view->title);
1376 else
1377 wrefresh(view->title);
1378 }
1380 static void
1381 resize_display(void)
1382 {
1383 int offset, i;
1384 struct view *base = display[0];
1385 struct view *view = display[1] ? display[1] : display[0];
1387 /* Setup window dimensions */
1389 getmaxyx(stdscr, base->height, base->width);
1391 /* Make room for the status window. */
1392 base->height -= 1;
1394 if (view != base) {
1395 /* Horizontal split. */
1396 view->width = base->width;
1397 view->height = SCALE_SPLIT_VIEW(base->height);
1398 base->height -= view->height;
1400 /* Make room for the title bar. */
1401 view->height -= 1;
1402 }
1404 /* Make room for the title bar. */
1405 base->height -= 1;
1407 offset = 0;
1409 foreach_displayed_view (view, i) {
1410 if (!view->win) {
1411 view->win = newwin(view->height, 0, offset, 0);
1412 if (!view->win)
1413 die("Failed to create %s view", view->name);
1415 scrollok(view->win, TRUE);
1417 view->title = newwin(1, 0, offset + view->height, 0);
1418 if (!view->title)
1419 die("Failed to create title window");
1421 } else {
1422 wresize(view->win, view->height, view->width);
1423 mvwin(view->win, offset, 0);
1424 mvwin(view->title, offset + view->height, 0);
1425 }
1427 offset += view->height + 1;
1428 }
1429 }
1431 static void
1432 redraw_display(void)
1433 {
1434 struct view *view;
1435 int i;
1437 foreach_displayed_view (view, i) {
1438 redraw_view(view);
1439 update_view_title(view);
1440 }
1441 }
1443 static void
1444 update_display_cursor(struct view *view)
1445 {
1446 /* Move the cursor to the right-most column of the cursor line.
1447 *
1448 * XXX: This could turn out to be a bit expensive, but it ensures that
1449 * the cursor does not jump around. */
1450 if (view->lines) {
1451 wmove(view->win, view->lineno - view->offset, view->width - 1);
1452 wrefresh(view->win);
1453 }
1454 }
1456 /*
1457 * Navigation
1458 */
1460 /* Scrolling backend */
1461 static void
1462 do_scroll_view(struct view *view, int lines)
1463 {
1464 bool redraw_current_line = FALSE;
1466 /* The rendering expects the new offset. */
1467 view->offset += lines;
1469 assert(0 <= view->offset && view->offset < view->lines);
1470 assert(lines);
1472 /* Move current line into the view. */
1473 if (view->lineno < view->offset) {
1474 view->lineno = view->offset;
1475 redraw_current_line = TRUE;
1476 } else if (view->lineno >= view->offset + view->height) {
1477 view->lineno = view->offset + view->height - 1;
1478 redraw_current_line = TRUE;
1479 }
1481 assert(view->offset <= view->lineno && view->lineno < view->lines);
1483 /* Redraw the whole screen if scrolling is pointless. */
1484 if (view->height < ABS(lines)) {
1485 redraw_view(view);
1487 } else {
1488 int line = lines > 0 ? view->height - lines : 0;
1489 int end = line + ABS(lines);
1491 wscrl(view->win, lines);
1493 for (; line < end; line++) {
1494 if (!draw_view_line(view, line))
1495 break;
1496 }
1498 if (redraw_current_line)
1499 draw_view_line(view, view->lineno - view->offset);
1500 }
1502 redrawwin(view->win);
1503 wrefresh(view->win);
1504 report("");
1505 }
1507 /* Scroll frontend */
1508 static void
1509 scroll_view(struct view *view, enum request request)
1510 {
1511 int lines = 1;
1513 assert(view_is_displayed(view));
1515 switch (request) {
1516 case REQ_SCROLL_PAGE_DOWN:
1517 lines = view->height;
1518 case REQ_SCROLL_LINE_DOWN:
1519 if (view->offset + lines > view->lines)
1520 lines = view->lines - view->offset;
1522 if (lines == 0 || view->offset + view->height >= view->lines) {
1523 report("Cannot scroll beyond the last line");
1524 return;
1525 }
1526 break;
1528 case REQ_SCROLL_PAGE_UP:
1529 lines = view->height;
1530 case REQ_SCROLL_LINE_UP:
1531 if (lines > view->offset)
1532 lines = view->offset;
1534 if (lines == 0) {
1535 report("Cannot scroll beyond the first line");
1536 return;
1537 }
1539 lines = -lines;
1540 break;
1542 default:
1543 die("request %d not handled in switch", request);
1544 }
1546 do_scroll_view(view, lines);
1547 }
1549 /* Cursor moving */
1550 static void
1551 move_view(struct view *view, enum request request)
1552 {
1553 int scroll_steps = 0;
1554 int steps;
1556 switch (request) {
1557 case REQ_MOVE_FIRST_LINE:
1558 steps = -view->lineno;
1559 break;
1561 case REQ_MOVE_LAST_LINE:
1562 steps = view->lines - view->lineno - 1;
1563 break;
1565 case REQ_MOVE_PAGE_UP:
1566 steps = view->height > view->lineno
1567 ? -view->lineno : -view->height;
1568 break;
1570 case REQ_MOVE_PAGE_DOWN:
1571 steps = view->lineno + view->height >= view->lines
1572 ? view->lines - view->lineno - 1 : view->height;
1573 break;
1575 case REQ_MOVE_UP:
1576 steps = -1;
1577 break;
1579 case REQ_MOVE_DOWN:
1580 steps = 1;
1581 break;
1583 default:
1584 die("request %d not handled in switch", request);
1585 }
1587 if (steps <= 0 && view->lineno == 0) {
1588 report("Cannot move beyond the first line");
1589 return;
1591 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1592 report("Cannot move beyond the last line");
1593 return;
1594 }
1596 /* Move the current line */
1597 view->lineno += steps;
1598 assert(0 <= view->lineno && view->lineno < view->lines);
1600 /* Check whether the view needs to be scrolled */
1601 if (view->lineno < view->offset ||
1602 view->lineno >= view->offset + view->height) {
1603 scroll_steps = steps;
1604 if (steps < 0 && -steps > view->offset) {
1605 scroll_steps = -view->offset;
1607 } else if (steps > 0) {
1608 if (view->lineno == view->lines - 1 &&
1609 view->lines > view->height) {
1610 scroll_steps = view->lines - view->offset - 1;
1611 if (scroll_steps >= view->height)
1612 scroll_steps -= view->height - 1;
1613 }
1614 }
1615 }
1617 if (!view_is_displayed(view)) {
1618 view->offset += steps;
1619 view->ops->select(view, &view->line[view->lineno]);
1620 return;
1621 }
1623 /* Repaint the old "current" line if we be scrolling */
1624 if (ABS(steps) < view->height)
1625 draw_view_line(view, view->lineno - steps - view->offset);
1627 if (scroll_steps) {
1628 do_scroll_view(view, scroll_steps);
1629 return;
1630 }
1632 /* Draw the current line */
1633 draw_view_line(view, view->lineno - view->offset);
1635 redrawwin(view->win);
1636 wrefresh(view->win);
1637 report("");
1638 }
1641 /*
1642 * Searching
1643 */
1645 static void search_view(struct view *view, enum request request);
1647 static bool
1648 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1649 {
1650 assert(view_is_displayed(view));
1652 if (!view->ops->grep(view, line))
1653 return FALSE;
1655 if (lineno - view->offset >= view->height) {
1656 view->offset = lineno;
1657 view->lineno = lineno;
1658 redraw_view(view);
1660 } else {
1661 unsigned long old_lineno = view->lineno - view->offset;
1663 view->lineno = lineno;
1664 draw_view_line(view, old_lineno);
1666 draw_view_line(view, view->lineno - view->offset);
1667 redrawwin(view->win);
1668 wrefresh(view->win);
1669 }
1671 report("Line %ld matches '%s'", lineno + 1, view->grep);
1672 return TRUE;
1673 }
1675 static void
1676 find_next(struct view *view, enum request request)
1677 {
1678 unsigned long lineno = view->lineno;
1679 int direction;
1681 if (!*view->grep) {
1682 if (!*opt_search)
1683 report("No previous search");
1684 else
1685 search_view(view, request);
1686 return;
1687 }
1689 switch (request) {
1690 case REQ_SEARCH:
1691 case REQ_FIND_NEXT:
1692 direction = 1;
1693 break;
1695 case REQ_SEARCH_BACK:
1696 case REQ_FIND_PREV:
1697 direction = -1;
1698 break;
1700 default:
1701 return;
1702 }
1704 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1705 lineno += direction;
1707 /* Note, lineno is unsigned long so will wrap around in which case it
1708 * will become bigger than view->lines. */
1709 for (; lineno < view->lines; lineno += direction) {
1710 struct line *line = &view->line[lineno];
1712 if (find_next_line(view, lineno, line))
1713 return;
1714 }
1716 report("No match found for '%s'", view->grep);
1717 }
1719 static void
1720 search_view(struct view *view, enum request request)
1721 {
1722 int regex_err;
1724 if (view->regex) {
1725 regfree(view->regex);
1726 *view->grep = 0;
1727 } else {
1728 view->regex = calloc(1, sizeof(*view->regex));
1729 if (!view->regex)
1730 return;
1731 }
1733 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1734 if (regex_err != 0) {
1735 char buf[SIZEOF_STR] = "unknown error";
1737 regerror(regex_err, view->regex, buf, sizeof(buf));
1738 report("Search failed: %s", buf);
1739 return;
1740 }
1742 string_copy(view->grep, opt_search);
1744 find_next(view, request);
1745 }
1747 /*
1748 * Incremental updating
1749 */
1751 static void
1752 end_update(struct view *view)
1753 {
1754 if (!view->pipe)
1755 return;
1756 set_nonblocking_input(FALSE);
1757 if (view->pipe == stdin)
1758 fclose(view->pipe);
1759 else
1760 pclose(view->pipe);
1761 view->pipe = NULL;
1762 }
1764 static bool
1765 begin_update(struct view *view)
1766 {
1767 const char *id = view->id;
1769 if (view->pipe)
1770 end_update(view);
1772 if (opt_cmd[0]) {
1773 string_copy(view->cmd, opt_cmd);
1774 opt_cmd[0] = 0;
1775 /* When running random commands, the view ref could have become
1776 * invalid so clear it. */
1777 view->ref[0] = 0;
1779 } else if (view == VIEW(REQ_VIEW_TREE)) {
1780 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1782 if (strcmp(view->vid, view->id))
1783 opt_path[0] = 0;
1785 if (!string_format(view->cmd, format, id, opt_path))
1786 return FALSE;
1788 } else {
1789 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1791 if (!string_format(view->cmd, format, id, id, id, id, id))
1792 return FALSE;
1793 }
1795 /* Special case for the pager view. */
1796 if (opt_pipe) {
1797 view->pipe = opt_pipe;
1798 opt_pipe = NULL;
1799 } else {
1800 view->pipe = popen(view->cmd, "r");
1801 }
1803 if (!view->pipe)
1804 return FALSE;
1806 set_nonblocking_input(TRUE);
1808 view->offset = 0;
1809 view->lines = 0;
1810 view->lineno = 0;
1811 string_copy(view->vid, id);
1813 if (view->line) {
1814 int i;
1816 for (i = 0; i < view->lines; i++)
1817 if (view->line[i].data)
1818 free(view->line[i].data);
1820 free(view->line);
1821 view->line = NULL;
1822 }
1824 view->start_time = time(NULL);
1826 return TRUE;
1827 }
1829 static struct line *
1830 realloc_lines(struct view *view, size_t line_size)
1831 {
1832 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1834 if (!tmp)
1835 return NULL;
1837 view->line = tmp;
1838 view->line_size = line_size;
1839 return view->line;
1840 }
1842 static bool
1843 update_view(struct view *view)
1844 {
1845 char in_buffer[BUFSIZ];
1846 char out_buffer[BUFSIZ * 2];
1847 char *line;
1848 /* The number of lines to read. If too low it will cause too much
1849 * redrawing (and possible flickering), if too high responsiveness
1850 * will suffer. */
1851 unsigned long lines = view->height;
1852 int redraw_from = -1;
1854 if (!view->pipe)
1855 return TRUE;
1857 /* Only redraw if lines are visible. */
1858 if (view->offset + view->height >= view->lines)
1859 redraw_from = view->lines - view->offset;
1861 /* FIXME: This is probably not perfect for backgrounded views. */
1862 if (!realloc_lines(view, view->lines + lines))
1863 goto alloc_error;
1865 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1866 size_t linelen = strlen(line);
1868 if (linelen)
1869 line[linelen - 1] = 0;
1871 if (opt_iconv != ICONV_NONE) {
1872 char *inbuf = line;
1873 size_t inlen = linelen;
1875 char *outbuf = out_buffer;
1876 size_t outlen = sizeof(out_buffer);
1878 size_t ret;
1880 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1881 if (ret != (size_t) -1) {
1882 line = out_buffer;
1883 linelen = strlen(out_buffer);
1884 }
1885 }
1887 if (!view->ops->read(view, line))
1888 goto alloc_error;
1890 if (lines-- == 1)
1891 break;
1892 }
1894 {
1895 int digits;
1897 lines = view->lines;
1898 for (digits = 0; lines; digits++)
1899 lines /= 10;
1901 /* Keep the displayed view in sync with line number scaling. */
1902 if (digits != view->digits) {
1903 view->digits = digits;
1904 redraw_from = 0;
1905 }
1906 }
1908 if (!view_is_displayed(view))
1909 goto check_pipe;
1911 if (view == VIEW(REQ_VIEW_TREE)) {
1912 /* Clear the view and redraw everything since the tree sorting
1913 * might have rearranged things. */
1914 redraw_view(view);
1916 } else if (redraw_from >= 0) {
1917 /* If this is an incremental update, redraw the previous line
1918 * since for commits some members could have changed when
1919 * loading the main view. */
1920 if (redraw_from > 0)
1921 redraw_from--;
1923 /* Incrementally draw avoids flickering. */
1924 redraw_view_from(view, redraw_from);
1925 }
1927 /* Update the title _after_ the redraw so that if the redraw picks up a
1928 * commit reference in view->ref it'll be available here. */
1929 update_view_title(view);
1931 check_pipe:
1932 if (ferror(view->pipe)) {
1933 report("Failed to read: %s", strerror(errno));
1934 goto end;
1936 } else if (feof(view->pipe)) {
1937 report("");
1938 goto end;
1939 }
1941 return TRUE;
1943 alloc_error:
1944 report("Allocation failure");
1946 end:
1947 end_update(view);
1948 return FALSE;
1949 }
1952 /*
1953 * View opening
1954 */
1956 static void open_help_view(struct view *view)
1957 {
1958 char buf[BUFSIZ];
1959 int lines = ARRAY_SIZE(req_info) + 2;
1960 int i;
1962 if (view->lines > 0)
1963 return;
1965 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1966 if (!req_info[i].request)
1967 lines++;
1969 view->line = calloc(lines, sizeof(*view->line));
1970 if (!view->line) {
1971 report("Allocation failure");
1972 return;
1973 }
1975 view->ops->read(view, "Quick reference for tig keybindings:");
1977 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1978 char *key;
1980 if (!req_info[i].request) {
1981 view->ops->read(view, "");
1982 view->ops->read(view, req_info[i].help);
1983 continue;
1984 }
1986 key = get_key(req_info[i].request);
1987 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1988 continue;
1990 view->ops->read(view, buf);
1991 }
1992 }
1994 enum open_flags {
1995 OPEN_DEFAULT = 0, /* Use default view switching. */
1996 OPEN_SPLIT = 1, /* Split current view. */
1997 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1998 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1999 };
2001 static void
2002 open_view(struct view *prev, enum request request, enum open_flags flags)
2003 {
2004 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2005 bool split = !!(flags & OPEN_SPLIT);
2006 bool reload = !!(flags & OPEN_RELOAD);
2007 struct view *view = VIEW(request);
2008 int nviews = displayed_views();
2009 struct view *base_view = display[0];
2011 if (view == prev && nviews == 1 && !reload) {
2012 report("Already in %s view", view->name);
2013 return;
2014 }
2016 if (view == VIEW(REQ_VIEW_HELP)) {
2017 open_help_view(view);
2019 } else if ((reload || strcmp(view->vid, view->id)) &&
2020 !begin_update(view)) {
2021 report("Failed to load %s view", view->name);
2022 return;
2023 }
2025 if (split) {
2026 display[1] = view;
2027 if (!backgrounded)
2028 current_view = 1;
2029 } else {
2030 /* Maximize the current view. */
2031 memset(display, 0, sizeof(display));
2032 current_view = 0;
2033 display[current_view] = view;
2034 }
2036 /* Resize the view when switching between split- and full-screen,
2037 * or when switching between two different full-screen views. */
2038 if (nviews != displayed_views() ||
2039 (nviews == 1 && base_view != display[0]))
2040 resize_display();
2042 if (split && prev->lineno - prev->offset >= prev->height) {
2043 /* Take the title line into account. */
2044 int lines = prev->lineno - prev->offset - prev->height + 1;
2046 /* Scroll the view that was split if the current line is
2047 * outside the new limited view. */
2048 do_scroll_view(prev, lines);
2049 }
2051 if (prev && view != prev) {
2052 if (split && !backgrounded) {
2053 /* "Blur" the previous view. */
2054 update_view_title(prev);
2055 }
2057 view->parent = prev;
2058 }
2060 if (view->pipe && view->lines == 0) {
2061 /* Clear the old view and let the incremental updating refill
2062 * the screen. */
2063 wclear(view->win);
2064 report("");
2065 } else {
2066 redraw_view(view);
2067 report("");
2068 }
2070 /* If the view is backgrounded the above calls to report()
2071 * won't redraw the view title. */
2072 if (backgrounded)
2073 update_view_title(view);
2074 }
2077 /*
2078 * User request switch noodle
2079 */
2081 static int
2082 view_driver(struct view *view, enum request request)
2083 {
2084 int i;
2086 switch (request) {
2087 case REQ_MOVE_UP:
2088 case REQ_MOVE_DOWN:
2089 case REQ_MOVE_PAGE_UP:
2090 case REQ_MOVE_PAGE_DOWN:
2091 case REQ_MOVE_FIRST_LINE:
2092 case REQ_MOVE_LAST_LINE:
2093 move_view(view, request);
2094 break;
2096 case REQ_SCROLL_LINE_DOWN:
2097 case REQ_SCROLL_LINE_UP:
2098 case REQ_SCROLL_PAGE_DOWN:
2099 case REQ_SCROLL_PAGE_UP:
2100 scroll_view(view, request);
2101 break;
2103 case REQ_VIEW_BLOB:
2104 if (!ref_blob[0]) {
2105 report("No file chosen, press 't' to open tree view");
2106 break;
2107 }
2108 /* Fall-through */
2109 case REQ_VIEW_MAIN:
2110 case REQ_VIEW_DIFF:
2111 case REQ_VIEW_LOG:
2112 case REQ_VIEW_TREE:
2113 case REQ_VIEW_HELP:
2114 case REQ_VIEW_PAGER:
2115 open_view(view, request, OPEN_DEFAULT);
2116 break;
2118 case REQ_NEXT:
2119 case REQ_PREVIOUS:
2120 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2122 if ((view == VIEW(REQ_VIEW_DIFF) &&
2123 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2124 (view == VIEW(REQ_VIEW_BLOB) &&
2125 view->parent == VIEW(REQ_VIEW_TREE))) {
2126 view = view->parent;
2127 move_view(view, request);
2128 if (view_is_displayed(view))
2129 update_view_title(view);
2130 } else {
2131 move_view(view, request);
2132 break;
2133 }
2134 /* Fall-through */
2136 case REQ_ENTER:
2137 if (!view->lines) {
2138 report("Nothing to enter");
2139 break;
2140 }
2141 return view->ops->enter(view, &view->line[view->lineno]);
2143 case REQ_VIEW_NEXT:
2144 {
2145 int nviews = displayed_views();
2146 int next_view = (current_view + 1) % nviews;
2148 if (next_view == current_view) {
2149 report("Only one view is displayed");
2150 break;
2151 }
2153 current_view = next_view;
2154 /* Blur out the title of the previous view. */
2155 update_view_title(view);
2156 report("");
2157 break;
2158 }
2159 case REQ_TOGGLE_LINENO:
2160 opt_line_number = !opt_line_number;
2161 redraw_display();
2162 break;
2164 case REQ_TOGGLE_REV_GRAPH:
2165 opt_rev_graph = !opt_rev_graph;
2166 redraw_display();
2167 break;
2169 case REQ_PROMPT:
2170 /* Always reload^Wrerun commands from the prompt. */
2171 open_view(view, opt_request, OPEN_RELOAD);
2172 break;
2174 case REQ_SEARCH:
2175 case REQ_SEARCH_BACK:
2176 search_view(view, request);
2177 break;
2179 case REQ_FIND_NEXT:
2180 case REQ_FIND_PREV:
2181 find_next(view, request);
2182 break;
2184 case REQ_STOP_LOADING:
2185 for (i = 0; i < ARRAY_SIZE(views); i++) {
2186 view = &views[i];
2187 if (view->pipe)
2188 report("Stopped loading the %s view", view->name),
2189 end_update(view);
2190 }
2191 break;
2193 case REQ_SHOW_VERSION:
2194 report("%s (built %s)", VERSION, __DATE__);
2195 return TRUE;
2197 case REQ_SCREEN_RESIZE:
2198 resize_display();
2199 /* Fall-through */
2200 case REQ_SCREEN_REDRAW:
2201 redraw_display();
2202 break;
2204 case REQ_NONE:
2205 doupdate();
2206 return TRUE;
2208 case REQ_VIEW_CLOSE:
2209 /* XXX: Mark closed views by letting view->parent point to the
2210 * view itself. Parents to closed view should never be
2211 * followed. */
2212 if (view->parent &&
2213 view->parent->parent != view->parent) {
2214 memset(display, 0, sizeof(display));
2215 current_view = 0;
2216 display[current_view] = view->parent;
2217 view->parent = view;
2218 resize_display();
2219 redraw_display();
2220 break;
2221 }
2222 /* Fall-through */
2223 case REQ_QUIT:
2224 return FALSE;
2226 default:
2227 /* An unknown key will show most commonly used commands. */
2228 report("Unknown key, press 'h' for help");
2229 return TRUE;
2230 }
2232 return TRUE;
2233 }
2236 /*
2237 * Pager backend
2238 */
2240 static bool
2241 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2242 {
2243 char *text = line->data;
2244 enum line_type type = line->type;
2245 int textlen = strlen(text);
2246 int attr;
2248 wmove(view->win, lineno, 0);
2250 if (selected) {
2251 type = LINE_CURSOR;
2252 wchgat(view->win, -1, 0, type, NULL);
2253 }
2255 attr = get_line_attr(type);
2256 wattrset(view->win, attr);
2258 if (opt_line_number || opt_tab_size < TABSIZE) {
2259 static char spaces[] = " ";
2260 int col_offset = 0, col = 0;
2262 if (opt_line_number) {
2263 unsigned long real_lineno = view->offset + lineno + 1;
2265 if (real_lineno == 1 ||
2266 (real_lineno % opt_num_interval) == 0) {
2267 wprintw(view->win, "%.*d", view->digits, real_lineno);
2269 } else {
2270 waddnstr(view->win, spaces,
2271 MIN(view->digits, STRING_SIZE(spaces)));
2272 }
2273 waddstr(view->win, ": ");
2274 col_offset = view->digits + 2;
2275 }
2277 while (text && col_offset + col < view->width) {
2278 int cols_max = view->width - col_offset - col;
2279 char *pos = text;
2280 int cols;
2282 if (*text == '\t') {
2283 text++;
2284 assert(sizeof(spaces) > TABSIZE);
2285 pos = spaces;
2286 cols = opt_tab_size - (col % opt_tab_size);
2288 } else {
2289 text = strchr(text, '\t');
2290 cols = line ? text - pos : strlen(pos);
2291 }
2293 waddnstr(view->win, pos, MIN(cols, cols_max));
2294 col += cols;
2295 }
2297 } else {
2298 int col = 0, pos = 0;
2300 for (; pos < textlen && col < view->width; pos++, col++)
2301 if (text[pos] == '\t')
2302 col += TABSIZE - (col % TABSIZE) - 1;
2304 waddnstr(view->win, text, pos);
2305 }
2307 return TRUE;
2308 }
2310 static bool
2311 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2312 {
2313 char refbuf[SIZEOF_STR];
2314 char *ref = NULL;
2315 FILE *pipe;
2317 if (!string_format(refbuf, "git describe %s", commit_id))
2318 return TRUE;
2320 pipe = popen(refbuf, "r");
2321 if (!pipe)
2322 return TRUE;
2324 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2325 ref = chomp_string(ref);
2326 pclose(pipe);
2328 if (!ref || !*ref)
2329 return TRUE;
2331 /* This is the only fatal call, since it can "corrupt" the buffer. */
2332 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2333 return FALSE;
2335 return TRUE;
2336 }
2338 static void
2339 add_pager_refs(struct view *view, struct line *line)
2340 {
2341 char buf[SIZEOF_STR];
2342 char *commit_id = line->data + STRING_SIZE("commit ");
2343 struct ref **refs;
2344 size_t bufpos = 0, refpos = 0;
2345 const char *sep = "Refs: ";
2346 bool is_tag = FALSE;
2348 assert(line->type == LINE_COMMIT);
2350 refs = get_refs(commit_id);
2351 if (!refs) {
2352 if (view == VIEW(REQ_VIEW_DIFF))
2353 goto try_add_describe_ref;
2354 return;
2355 }
2357 do {
2358 struct ref *ref = refs[refpos];
2359 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2361 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2362 return;
2363 sep = ", ";
2364 if (ref->tag)
2365 is_tag = TRUE;
2366 } while (refs[refpos++]->next);
2368 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2369 try_add_describe_ref:
2370 /* Add <tag>-g<commit_id> "fake" reference. */
2371 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2372 return;
2373 }
2375 if (bufpos == 0)
2376 return;
2378 if (!realloc_lines(view, view->line_size + 1))
2379 return;
2381 line = &view->line[view->lines];
2382 line->data = strdup(buf);
2383 if (!line->data)
2384 return;
2386 line->type = LINE_PP_REFS;
2387 view->lines++;
2388 }
2390 static bool
2391 pager_read(struct view *view, char *data)
2392 {
2393 struct line *line = &view->line[view->lines];
2395 line->data = strdup(data);
2396 if (!line->data)
2397 return FALSE;
2399 line->type = get_line_type(line->data);
2400 view->lines++;
2402 if (line->type == LINE_COMMIT &&
2403 (view == VIEW(REQ_VIEW_DIFF) ||
2404 view == VIEW(REQ_VIEW_LOG)))
2405 add_pager_refs(view, line);
2407 return TRUE;
2408 }
2410 static bool
2411 pager_enter(struct view *view, struct line *line)
2412 {
2413 int split = 0;
2415 if (line->type == LINE_COMMIT &&
2416 (view == VIEW(REQ_VIEW_LOG) ||
2417 view == VIEW(REQ_VIEW_PAGER))) {
2418 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2419 split = 1;
2420 }
2422 /* Always scroll the view even if it was split. That way
2423 * you can use Enter to scroll through the log view and
2424 * split open each commit diff. */
2425 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2427 /* FIXME: A minor workaround. Scrolling the view will call report("")
2428 * but if we are scrolling a non-current view this won't properly
2429 * update the view title. */
2430 if (split)
2431 update_view_title(view);
2433 return TRUE;
2434 }
2436 static bool
2437 pager_grep(struct view *view, struct line *line)
2438 {
2439 regmatch_t pmatch;
2440 char *text = line->data;
2442 if (!*text)
2443 return FALSE;
2445 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2446 return FALSE;
2448 return TRUE;
2449 }
2451 static void
2452 pager_select(struct view *view, struct line *line)
2453 {
2454 if (line->type == LINE_COMMIT) {
2455 char *text = line->data;
2457 string_copy(view->ref, text + STRING_SIZE("commit "));
2458 string_copy(ref_commit, view->ref);
2459 }
2460 }
2462 static struct view_ops pager_ops = {
2463 "line",
2464 pager_draw,
2465 pager_read,
2466 pager_enter,
2467 pager_grep,
2468 pager_select,
2469 };
2472 /*
2473 * Tree backend
2474 */
2476 /* Parse output from git-ls-tree(1):
2477 *
2478 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2479 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2480 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2481 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2482 */
2484 #define SIZEOF_TREE_ATTR \
2485 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2487 #define TREE_UP_FORMAT "040000 tree %s\t.."
2489 static int
2490 tree_compare_entry(enum line_type type1, char *name1,
2491 enum line_type type2, char *name2)
2492 {
2493 if (type1 != type2) {
2494 if (type1 == LINE_TREE_DIR)
2495 return -1;
2496 return 1;
2497 }
2499 return strcmp(name1, name2);
2500 }
2502 static bool
2503 tree_read(struct view *view, char *text)
2504 {
2505 size_t textlen = strlen(text);
2506 char buf[SIZEOF_STR];
2507 unsigned long pos;
2508 enum line_type type;
2509 bool first_read = view->lines == 0;
2511 if (textlen <= SIZEOF_TREE_ATTR)
2512 return FALSE;
2514 type = text[STRING_SIZE("100644 ")] == 't'
2515 ? LINE_TREE_DIR : LINE_TREE_FILE;
2517 if (first_read) {
2518 /* Add path info line */
2519 if (string_format(buf, "Directory path /%s", opt_path) &&
2520 realloc_lines(view, view->line_size + 1) &&
2521 pager_read(view, buf))
2522 view->line[view->lines - 1].type = LINE_DEFAULT;
2523 else
2524 return FALSE;
2526 /* Insert "link" to parent directory. */
2527 if (*opt_path &&
2528 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2529 realloc_lines(view, view->line_size + 1) &&
2530 pager_read(view, buf))
2531 view->line[view->lines - 1].type = LINE_TREE_DIR;
2532 else if (*opt_path)
2533 return FALSE;
2534 }
2536 /* Strip the path part ... */
2537 if (*opt_path) {
2538 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2539 size_t striplen = strlen(opt_path);
2540 char *path = text + SIZEOF_TREE_ATTR;
2542 if (pathlen > striplen)
2543 memmove(path, path + striplen,
2544 pathlen - striplen + 1);
2545 }
2547 /* Skip "Directory ..." and ".." line. */
2548 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2549 struct line *line = &view->line[pos];
2550 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2551 char *path2 = text + SIZEOF_TREE_ATTR;
2552 int cmp = tree_compare_entry(line->type, path1, type, path2);
2554 if (cmp <= 0)
2555 continue;
2557 text = strdup(text);
2558 if (!text)
2559 return FALSE;
2561 if (view->lines > pos)
2562 memmove(&view->line[pos + 1], &view->line[pos],
2563 (view->lines - pos) * sizeof(*line));
2565 line = &view->line[pos];
2566 line->data = text;
2567 line->type = type;
2568 view->lines++;
2569 return TRUE;
2570 }
2572 if (!pager_read(view, text))
2573 return FALSE;
2575 /* Move the current line to the first tree entry. */
2576 if (first_read)
2577 view->lineno++;
2579 view->line[view->lines - 1].type = type;
2580 return TRUE;
2581 }
2583 static bool
2584 tree_enter(struct view *view, struct line *line)
2585 {
2586 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2587 enum request request;
2589 switch (line->type) {
2590 case LINE_TREE_DIR:
2591 /* Depending on whether it is a subdir or parent (updir?) link
2592 * mangle the path buffer. */
2593 if (line == &view->line[1] && *opt_path) {
2594 size_t path_len = strlen(opt_path);
2595 char *dirsep = opt_path + path_len - 1;
2597 while (dirsep > opt_path && dirsep[-1] != '/')
2598 dirsep--;
2600 dirsep[0] = 0;
2602 } else {
2603 size_t pathlen = strlen(opt_path);
2604 size_t origlen = pathlen;
2605 char *data = line->data;
2606 char *basename = data + SIZEOF_TREE_ATTR;
2608 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2609 opt_path[origlen] = 0;
2610 return TRUE;
2611 }
2612 }
2614 /* Trees and subtrees share the same ID, so they are not not
2615 * unique like blobs. */
2616 flags |= OPEN_RELOAD;
2617 request = REQ_VIEW_TREE;
2618 break;
2620 case LINE_TREE_FILE:
2621 request = REQ_VIEW_BLOB;
2622 break;
2624 default:
2625 return TRUE;
2626 }
2628 open_view(view, request, flags);
2630 return TRUE;
2631 }
2633 static void
2634 tree_select(struct view *view, struct line *line)
2635 {
2636 char *text = line->data;
2638 text += STRING_SIZE("100644 blob ");
2640 if (line->type == LINE_TREE_FILE) {
2641 string_ncopy(ref_blob, text, 40);
2642 /* Also update the blob view's ref, since all there must always
2643 * be in sync. */
2644 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2646 } else if (line->type != LINE_TREE_DIR) {
2647 return;
2648 }
2650 string_ncopy(view->ref, text, 40);
2651 }
2653 static struct view_ops tree_ops = {
2654 "file",
2655 pager_draw,
2656 tree_read,
2657 tree_enter,
2658 pager_grep,
2659 tree_select,
2660 };
2662 static bool
2663 blob_read(struct view *view, char *line)
2664 {
2665 bool state = pager_read(view, line);
2667 if (state == TRUE)
2668 view->line[view->lines - 1].type = LINE_DEFAULT;
2670 return state;
2671 }
2673 static struct view_ops blob_ops = {
2674 "line",
2675 pager_draw,
2676 blob_read,
2677 pager_enter,
2678 pager_grep,
2679 pager_select,
2680 };
2683 /*
2684 * Main view backend
2685 */
2687 struct commit {
2688 char id[SIZEOF_REV]; /* SHA1 ID. */
2689 char title[75]; /* First line of the commit message. */
2690 char author[75]; /* Author of the commit. */
2691 struct tm time; /* Date from the author ident. */
2692 struct ref **refs; /* Repository references. */
2693 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2694 size_t graph_size; /* The width of the graph array. */
2695 };
2697 static bool
2698 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2699 {
2700 char buf[DATE_COLS + 1];
2701 struct commit *commit = line->data;
2702 enum line_type type;
2703 int col = 0;
2704 size_t timelen;
2705 size_t authorlen;
2706 int trimmed = 1;
2708 if (!*commit->author)
2709 return FALSE;
2711 wmove(view->win, lineno, col);
2713 if (selected) {
2714 type = LINE_CURSOR;
2715 wattrset(view->win, get_line_attr(type));
2716 wchgat(view->win, -1, 0, type, NULL);
2718 } else {
2719 type = LINE_MAIN_COMMIT;
2720 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2721 }
2723 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2724 waddnstr(view->win, buf, timelen);
2725 waddstr(view->win, " ");
2727 col += DATE_COLS;
2728 wmove(view->win, lineno, col);
2729 if (type != LINE_CURSOR)
2730 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2732 if (opt_utf8) {
2733 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2734 } else {
2735 authorlen = strlen(commit->author);
2736 if (authorlen > AUTHOR_COLS - 2) {
2737 authorlen = AUTHOR_COLS - 2;
2738 trimmed = 1;
2739 }
2740 }
2742 if (trimmed) {
2743 waddnstr(view->win, commit->author, authorlen);
2744 if (type != LINE_CURSOR)
2745 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2746 waddch(view->win, '~');
2747 } else {
2748 waddstr(view->win, commit->author);
2749 }
2751 col += AUTHOR_COLS;
2752 if (type != LINE_CURSOR)
2753 wattrset(view->win, A_NORMAL);
2755 if (opt_rev_graph && commit->graph_size) {
2756 size_t i;
2758 wmove(view->win, lineno, col);
2759 /* Using waddch() instead of waddnstr() ensures that
2760 * they'll be rendered correctly for the cursor line. */
2761 for (i = 0; i < commit->graph_size; i++)
2762 waddch(view->win, commit->graph[i]);
2764 col += commit->graph_size + 1;
2765 }
2767 wmove(view->win, lineno, col);
2769 if (commit->refs) {
2770 size_t i = 0;
2772 do {
2773 if (type == LINE_CURSOR)
2774 ;
2775 else if (commit->refs[i]->tag)
2776 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2777 else
2778 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2779 waddstr(view->win, "[");
2780 waddstr(view->win, commit->refs[i]->name);
2781 waddstr(view->win, "]");
2782 if (type != LINE_CURSOR)
2783 wattrset(view->win, A_NORMAL);
2784 waddstr(view->win, " ");
2785 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2786 } while (commit->refs[i++]->next);
2787 }
2789 if (type != LINE_CURSOR)
2790 wattrset(view->win, get_line_attr(type));
2792 {
2793 int titlelen = strlen(commit->title);
2795 if (col + titlelen > view->width)
2796 titlelen = view->width - col;
2798 waddnstr(view->win, commit->title, titlelen);
2799 }
2801 return TRUE;
2802 }
2804 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2805 static bool
2806 main_read(struct view *view, char *line)
2807 {
2808 enum line_type type = get_line_type(line);
2809 struct commit *commit = view->lines
2810 ? view->line[view->lines - 1].data : NULL;
2812 switch (type) {
2813 case LINE_COMMIT:
2814 commit = calloc(1, sizeof(struct commit));
2815 if (!commit)
2816 return FALSE;
2818 line += STRING_SIZE("commit ");
2820 view->line[view->lines++].data = commit;
2821 string_copy(commit->id, line);
2822 commit->refs = get_refs(commit->id);
2823 commit->graph[commit->graph_size++] = ACS_LTEE;
2824 break;
2826 case LINE_AUTHOR:
2827 {
2828 char *ident = line + STRING_SIZE("author ");
2829 char *end = strchr(ident, '<');
2831 if (!commit)
2832 break;
2834 if (end) {
2835 char *email = end + 1;
2837 for (; end > ident && isspace(end[-1]); end--) ;
2839 if (end == ident && *email) {
2840 ident = email;
2841 end = strchr(ident, '>');
2842 for (; end > ident && isspace(end[-1]); end--) ;
2843 }
2844 *end = 0;
2845 }
2847 /* End is NULL or ident meaning there's no author. */
2848 if (end <= ident)
2849 ident = "Unknown";
2851 string_copy(commit->author, ident);
2853 /* Parse epoch and timezone */
2854 if (end) {
2855 char *secs = strchr(end + 1, '>');
2856 char *zone;
2857 time_t time;
2859 if (!secs || secs[1] != ' ')
2860 break;
2862 secs += 2;
2863 time = (time_t) atol(secs);
2864 zone = strchr(secs, ' ');
2865 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2866 long tz;
2868 zone++;
2869 tz = ('0' - zone[1]) * 60 * 60 * 10;
2870 tz += ('0' - zone[2]) * 60 * 60;
2871 tz += ('0' - zone[3]) * 60;
2872 tz += ('0' - zone[4]) * 60;
2874 if (zone[0] == '-')
2875 tz = -tz;
2877 time -= tz;
2878 }
2879 gmtime_r(&time, &commit->time);
2880 }
2881 break;
2882 }
2883 default:
2884 if (!commit)
2885 break;
2887 /* Fill in the commit title if it has not already been set. */
2888 if (commit->title[0])
2889 break;
2891 /* Require titles to start with a non-space character at the
2892 * offset used by git log. */
2893 /* FIXME: More gracefull handling of titles; append "..." to
2894 * shortened titles, etc. */
2895 if (strncmp(line, " ", 4) ||
2896 isspace(line[4]))
2897 break;
2899 string_copy(commit->title, line + 4);
2900 }
2902 return TRUE;
2903 }
2905 static bool
2906 main_enter(struct view *view, struct line *line)
2907 {
2908 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2910 open_view(view, REQ_VIEW_DIFF, flags);
2911 return TRUE;
2912 }
2914 static bool
2915 main_grep(struct view *view, struct line *line)
2916 {
2917 struct commit *commit = line->data;
2918 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2919 char buf[DATE_COLS + 1];
2920 regmatch_t pmatch;
2922 for (state = S_TITLE; state < S_END; state++) {
2923 char *text;
2925 switch (state) {
2926 case S_TITLE: text = commit->title; break;
2927 case S_AUTHOR: text = commit->author; break;
2928 case S_DATE:
2929 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2930 continue;
2931 text = buf;
2932 break;
2934 default:
2935 return FALSE;
2936 }
2938 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
2939 return TRUE;
2940 }
2942 return FALSE;
2943 }
2945 static void
2946 main_select(struct view *view, struct line *line)
2947 {
2948 struct commit *commit = line->data;
2950 string_copy(view->ref, commit->id);
2951 string_copy(ref_commit, view->ref);
2952 }
2954 static struct view_ops main_ops = {
2955 "commit",
2956 main_draw,
2957 main_read,
2958 main_enter,
2959 main_grep,
2960 main_select,
2961 };
2964 /*
2965 * Unicode / UTF-8 handling
2966 *
2967 * NOTE: Much of the following code for dealing with unicode is derived from
2968 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2969 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2970 */
2972 /* I've (over)annotated a lot of code snippets because I am not entirely
2973 * confident that the approach taken by this small UTF-8 interface is correct.
2974 * --jonas */
2976 static inline int
2977 unicode_width(unsigned long c)
2978 {
2979 if (c >= 0x1100 &&
2980 (c <= 0x115f /* Hangul Jamo */
2981 || c == 0x2329
2982 || c == 0x232a
2983 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2984 /* CJK ... Yi */
2985 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2986 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2987 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2988 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2989 || (c >= 0xffe0 && c <= 0xffe6)
2990 || (c >= 0x20000 && c <= 0x2fffd)
2991 || (c >= 0x30000 && c <= 0x3fffd)))
2992 return 2;
2994 return 1;
2995 }
2997 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2998 * Illegal bytes are set one. */
2999 static const unsigned char utf8_bytes[256] = {
3000 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,
3001 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,
3002 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,
3003 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,
3004 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,
3005 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,
3006 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,
3007 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,
3008 };
3010 /* Decode UTF-8 multi-byte representation into a unicode character. */
3011 static inline unsigned long
3012 utf8_to_unicode(const char *string, size_t length)
3013 {
3014 unsigned long unicode;
3016 switch (length) {
3017 case 1:
3018 unicode = string[0];
3019 break;
3020 case 2:
3021 unicode = (string[0] & 0x1f) << 6;
3022 unicode += (string[1] & 0x3f);
3023 break;
3024 case 3:
3025 unicode = (string[0] & 0x0f) << 12;
3026 unicode += ((string[1] & 0x3f) << 6);
3027 unicode += (string[2] & 0x3f);
3028 break;
3029 case 4:
3030 unicode = (string[0] & 0x0f) << 18;
3031 unicode += ((string[1] & 0x3f) << 12);
3032 unicode += ((string[2] & 0x3f) << 6);
3033 unicode += (string[3] & 0x3f);
3034 break;
3035 case 5:
3036 unicode = (string[0] & 0x0f) << 24;
3037 unicode += ((string[1] & 0x3f) << 18);
3038 unicode += ((string[2] & 0x3f) << 12);
3039 unicode += ((string[3] & 0x3f) << 6);
3040 unicode += (string[4] & 0x3f);
3041 break;
3042 case 6:
3043 unicode = (string[0] & 0x01) << 30;
3044 unicode += ((string[1] & 0x3f) << 24);
3045 unicode += ((string[2] & 0x3f) << 18);
3046 unicode += ((string[3] & 0x3f) << 12);
3047 unicode += ((string[4] & 0x3f) << 6);
3048 unicode += (string[5] & 0x3f);
3049 break;
3050 default:
3051 die("Invalid unicode length");
3052 }
3054 /* Invalid characters could return the special 0xfffd value but NUL
3055 * should be just as good. */
3056 return unicode > 0xffff ? 0 : unicode;
3057 }
3059 /* Calculates how much of string can be shown within the given maximum width
3060 * and sets trimmed parameter to non-zero value if all of string could not be
3061 * shown.
3062 *
3063 * Additionally, adds to coloffset how many many columns to move to align with
3064 * the expected position. Takes into account how multi-byte and double-width
3065 * characters will effect the cursor position.
3066 *
3067 * Returns the number of bytes to output from string to satisfy max_width. */
3068 static size_t
3069 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3070 {
3071 const char *start = string;
3072 const char *end = strchr(string, '\0');
3073 size_t mbwidth = 0;
3074 size_t width = 0;
3076 *trimmed = 0;
3078 while (string < end) {
3079 int c = *(unsigned char *) string;
3080 unsigned char bytes = utf8_bytes[c];
3081 size_t ucwidth;
3082 unsigned long unicode;
3084 if (string + bytes > end)
3085 break;
3087 /* Change representation to figure out whether
3088 * it is a single- or double-width character. */
3090 unicode = utf8_to_unicode(string, bytes);
3091 /* FIXME: Graceful handling of invalid unicode character. */
3092 if (!unicode)
3093 break;
3095 ucwidth = unicode_width(unicode);
3096 width += ucwidth;
3097 if (width > max_width) {
3098 *trimmed = 1;
3099 break;
3100 }
3102 /* The column offset collects the differences between the
3103 * number of bytes encoding a character and the number of
3104 * columns will be used for rendering said character.
3105 *
3106 * So if some character A is encoded in 2 bytes, but will be
3107 * represented on the screen using only 1 byte this will and up
3108 * adding 1 to the multi-byte column offset.
3109 *
3110 * Assumes that no double-width character can be encoding in
3111 * less than two bytes. */
3112 if (bytes > ucwidth)
3113 mbwidth += bytes - ucwidth;
3115 string += bytes;
3116 }
3118 *coloffset += mbwidth;
3120 return string - start;
3121 }
3124 /*
3125 * Status management
3126 */
3128 /* Whether or not the curses interface has been initialized. */
3129 static bool cursed = FALSE;
3131 /* The status window is used for polling keystrokes. */
3132 static WINDOW *status_win;
3134 static bool status_empty = TRUE;
3136 /* Update status and title window. */
3137 static void
3138 report(const char *msg, ...)
3139 {
3140 struct view *view = display[current_view];
3142 if (input_mode)
3143 return;
3145 if (!status_empty || *msg) {
3146 va_list args;
3148 va_start(args, msg);
3150 wmove(status_win, 0, 0);
3151 if (*msg) {
3152 vwprintw(status_win, msg, args);
3153 status_empty = FALSE;
3154 } else {
3155 status_empty = TRUE;
3156 }
3157 wclrtoeol(status_win);
3158 wrefresh(status_win);
3160 va_end(args);
3161 }
3163 update_view_title(view);
3164 update_display_cursor(view);
3165 }
3167 /* Controls when nodelay should be in effect when polling user input. */
3168 static void
3169 set_nonblocking_input(bool loading)
3170 {
3171 static unsigned int loading_views;
3173 if ((loading == FALSE && loading_views-- == 1) ||
3174 (loading == TRUE && loading_views++ == 0))
3175 nodelay(status_win, loading);
3176 }
3178 static void
3179 init_display(void)
3180 {
3181 int x, y;
3183 /* Initialize the curses library */
3184 if (isatty(STDIN_FILENO)) {
3185 cursed = !!initscr();
3186 } else {
3187 /* Leave stdin and stdout alone when acting as a pager. */
3188 FILE *io = fopen("/dev/tty", "r+");
3190 if (!io)
3191 die("Failed to open /dev/tty");
3192 cursed = !!newterm(NULL, io, io);
3193 }
3195 if (!cursed)
3196 die("Failed to initialize curses");
3198 nonl(); /* Tell curses not to do NL->CR/NL on output */
3199 cbreak(); /* Take input chars one at a time, no wait for \n */
3200 noecho(); /* Don't echo input */
3201 leaveok(stdscr, TRUE);
3203 if (has_colors())
3204 init_colors();
3206 getmaxyx(stdscr, y, x);
3207 status_win = newwin(1, 0, y - 1, 0);
3208 if (!status_win)
3209 die("Failed to create status window");
3211 /* Enable keyboard mapping */
3212 keypad(status_win, TRUE);
3213 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3214 }
3216 static char *
3217 read_prompt(const char *prompt)
3218 {
3219 enum { READING, STOP, CANCEL } status = READING;
3220 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3221 int pos = 0;
3223 while (status == READING) {
3224 struct view *view;
3225 int i, key;
3227 input_mode = TRUE;
3229 foreach_view (view, i)
3230 update_view(view);
3232 input_mode = FALSE;
3234 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
3235 wclrtoeol(status_win);
3237 /* Refresh, accept single keystroke of input */
3238 key = wgetch(status_win);
3239 switch (key) {
3240 case KEY_RETURN:
3241 case KEY_ENTER:
3242 case '\n':
3243 status = pos ? STOP : CANCEL;
3244 break;
3246 case KEY_BACKSPACE:
3247 if (pos > 0)
3248 pos--;
3249 else
3250 status = CANCEL;
3251 break;
3253 case KEY_ESC:
3254 status = CANCEL;
3255 break;
3257 case ERR:
3258 break;
3260 default:
3261 if (pos >= sizeof(buf)) {
3262 report("Input string too long");
3263 return NULL;
3264 }
3266 if (isprint(key))
3267 buf[pos++] = (char) key;
3268 }
3269 }
3271 /* Clear the status window */
3272 status_empty = FALSE;
3273 report("");
3275 if (status == CANCEL)
3276 return NULL;
3278 buf[pos++] = 0;
3280 return buf;
3281 }
3283 /*
3284 * Repository references
3285 */
3287 static struct ref *refs;
3288 static size_t refs_size;
3290 /* Id <-> ref store */
3291 static struct ref ***id_refs;
3292 static size_t id_refs_size;
3294 static struct ref **
3295 get_refs(char *id)
3296 {
3297 struct ref ***tmp_id_refs;
3298 struct ref **ref_list = NULL;
3299 size_t ref_list_size = 0;
3300 size_t i;
3302 for (i = 0; i < id_refs_size; i++)
3303 if (!strcmp(id, id_refs[i][0]->id))
3304 return id_refs[i];
3306 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3307 if (!tmp_id_refs)
3308 return NULL;
3310 id_refs = tmp_id_refs;
3312 for (i = 0; i < refs_size; i++) {
3313 struct ref **tmp;
3315 if (strcmp(id, refs[i].id))
3316 continue;
3318 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3319 if (!tmp) {
3320 if (ref_list)
3321 free(ref_list);
3322 return NULL;
3323 }
3325 ref_list = tmp;
3326 if (ref_list_size > 0)
3327 ref_list[ref_list_size - 1]->next = 1;
3328 ref_list[ref_list_size] = &refs[i];
3330 /* XXX: The properties of the commit chains ensures that we can
3331 * safely modify the shared ref. The repo references will
3332 * always be similar for the same id. */
3333 ref_list[ref_list_size]->next = 0;
3334 ref_list_size++;
3335 }
3337 if (ref_list)
3338 id_refs[id_refs_size++] = ref_list;
3340 return ref_list;
3341 }
3343 static int
3344 read_ref(char *id, int idlen, char *name, int namelen)
3345 {
3346 struct ref *ref;
3347 bool tag = FALSE;
3349 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3350 /* Commits referenced by tags has "^{}" appended. */
3351 if (name[namelen - 1] != '}')
3352 return OK;
3354 while (namelen > 0 && name[namelen] != '^')
3355 namelen--;
3357 tag = TRUE;
3358 namelen -= STRING_SIZE("refs/tags/");
3359 name += STRING_SIZE("refs/tags/");
3361 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3362 namelen -= STRING_SIZE("refs/heads/");
3363 name += STRING_SIZE("refs/heads/");
3365 } else if (!strcmp(name, "HEAD")) {
3366 return OK;
3367 }
3369 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3370 if (!refs)
3371 return ERR;
3373 ref = &refs[refs_size++];
3374 ref->name = malloc(namelen + 1);
3375 if (!ref->name)
3376 return ERR;
3378 strncpy(ref->name, name, namelen);
3379 ref->name[namelen] = 0;
3380 ref->tag = tag;
3381 string_copy(ref->id, id);
3383 return OK;
3384 }
3386 static int
3387 load_refs(void)
3388 {
3389 const char *cmd_env = getenv("TIG_LS_REMOTE");
3390 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3392 return read_properties(popen(cmd, "r"), "\t", read_ref);
3393 }
3395 static int
3396 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3397 {
3398 if (!strcmp(name, "i18n.commitencoding"))
3399 string_copy(opt_encoding, value);
3401 return OK;
3402 }
3404 static int
3405 load_repo_config(void)
3406 {
3407 return read_properties(popen("git repo-config --list", "r"),
3408 "=", read_repo_config_option);
3409 }
3411 static int
3412 read_properties(FILE *pipe, const char *separators,
3413 int (*read_property)(char *, int, char *, int))
3414 {
3415 char buffer[BUFSIZ];
3416 char *name;
3417 int state = OK;
3419 if (!pipe)
3420 return ERR;
3422 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3423 char *value;
3424 size_t namelen;
3425 size_t valuelen;
3427 name = chomp_string(name);
3428 namelen = strcspn(name, separators);
3430 if (name[namelen]) {
3431 name[namelen] = 0;
3432 value = chomp_string(name + namelen + 1);
3433 valuelen = strlen(value);
3435 } else {
3436 value = "";
3437 valuelen = 0;
3438 }
3440 state = read_property(name, namelen, value, valuelen);
3441 }
3443 if (state != ERR && ferror(pipe))
3444 state = ERR;
3446 pclose(pipe);
3448 return state;
3449 }
3452 /*
3453 * Main
3454 */
3456 static void __NORETURN
3457 quit(int sig)
3458 {
3459 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3460 if (cursed)
3461 endwin();
3462 exit(0);
3463 }
3465 static void __NORETURN
3466 die(const char *err, ...)
3467 {
3468 va_list args;
3470 endwin();
3472 va_start(args, err);
3473 fputs("tig: ", stderr);
3474 vfprintf(stderr, err, args);
3475 fputs("\n", stderr);
3476 va_end(args);
3478 exit(1);
3479 }
3481 int
3482 main(int argc, char *argv[])
3483 {
3484 struct view *view;
3485 enum request request;
3486 size_t i;
3488 signal(SIGINT, quit);
3490 if (setlocale(LC_ALL, "")) {
3491 string_copy(opt_codeset, nl_langinfo(CODESET));
3492 }
3494 if (load_options() == ERR)
3495 die("Failed to load user config.");
3497 /* Load the repo config file so options can be overwritten from
3498 * the command line. */
3499 if (load_repo_config() == ERR)
3500 die("Failed to load repo config.");
3502 if (!parse_options(argc, argv))
3503 return 0;
3505 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3506 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3507 if (opt_iconv == ICONV_NONE)
3508 die("Failed to initialize character set conversion");
3509 }
3511 if (load_refs() == ERR)
3512 die("Failed to load refs.");
3514 /* Require a git repository unless when running in pager mode. */
3515 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3516 die("Not a git repository");
3518 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3519 view->cmd_env = getenv(view->cmd_env);
3521 request = opt_request;
3523 init_display();
3525 while (view_driver(display[current_view], request)) {
3526 int key;
3527 int i;
3529 foreach_view (view, i)
3530 update_view(view);
3532 /* Refresh, accept single keystroke of input */
3533 key = wgetch(status_win);
3534 if (key == ERR)
3535 continue;
3537 request = get_keybinding(display[current_view]->keymap, key);
3539 /* Some low-level request handling. This keeps access to
3540 * status_win restricted. */
3541 switch (request) {
3542 case REQ_PROMPT:
3543 {
3544 char *cmd = read_prompt(":");
3546 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3547 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3548 opt_request = REQ_VIEW_DIFF;
3549 } else {
3550 opt_request = REQ_VIEW_PAGER;
3551 }
3552 break;
3553 }
3555 request = REQ_NONE;
3556 break;
3557 }
3558 case REQ_SEARCH:
3559 case REQ_SEARCH_BACK:
3560 {
3561 const char *prompt = request == REQ_SEARCH
3562 ? "/" : "?";
3563 char *search = read_prompt(prompt);
3565 if (search)
3566 string_copy(opt_search, search);
3567 else
3568 request = REQ_NONE;
3569 break;
3570 }
3571 case REQ_SCREEN_RESIZE:
3572 {
3573 int height, width;
3575 getmaxyx(stdscr, height, width);
3577 /* Resize the status view and let the view driver take
3578 * care of resizing the displayed views. */
3579 wresize(status_win, 1, width);
3580 mvwin(status_win, height - 1, 0);
3581 wrefresh(status_win);
3582 break;
3583 }
3584 default:
3585 break;
3586 }
3587 }
3589 quit(0);
3591 return 0;
3592 }