7511353c8e3fb3ed70ac3194c29b2070015ad64c
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 = keybindings[keymap];
772 if (!keybinding)
773 keybinding = calloc(1, sizeof(*keybinding));
774 if (!keybinding)
775 die("Failed to allocate keybinding");
777 keybinding->alias = key;
778 keybinding->request = request;
779 keybinding->next = keybindings[keymap];
780 keybindings[keymap] = keybinding;
781 }
783 /* Looks for a key binding first in the given map, then in the generic map, and
784 * lastly in the default keybindings. */
785 static enum request
786 get_keybinding(enum keymap keymap, int key)
787 {
788 struct keybinding *kbd;
789 int i;
791 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
792 if (kbd->alias == key)
793 return kbd->request;
795 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
796 if (kbd->alias == key)
797 return kbd->request;
799 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
800 if (default_keybindings[i].alias == key)
801 return default_keybindings[i].request;
803 return (enum request) key;
804 }
807 struct key {
808 char *name;
809 int value;
810 };
812 static struct key key_table[] = {
813 { "Enter", KEY_RETURN },
814 { "Space", ' ' },
815 { "Backspace", KEY_BACKSPACE },
816 { "Tab", KEY_TAB },
817 { "Escape", KEY_ESC },
818 { "Left", KEY_LEFT },
819 { "Right", KEY_RIGHT },
820 { "Up", KEY_UP },
821 { "Down", KEY_DOWN },
822 { "Insert", KEY_IC },
823 { "Delete", KEY_DC },
824 { "Hash", '#' },
825 { "Home", KEY_HOME },
826 { "End", KEY_END },
827 { "PageUp", KEY_PPAGE },
828 { "PageDown", KEY_NPAGE },
829 { "F1", KEY_F(1) },
830 { "F2", KEY_F(2) },
831 { "F3", KEY_F(3) },
832 { "F4", KEY_F(4) },
833 { "F5", KEY_F(5) },
834 { "F6", KEY_F(6) },
835 { "F7", KEY_F(7) },
836 { "F8", KEY_F(8) },
837 { "F9", KEY_F(9) },
838 { "F10", KEY_F(10) },
839 { "F11", KEY_F(11) },
840 { "F12", KEY_F(12) },
841 };
843 static int
844 get_key_value(const char *name)
845 {
846 int i;
848 for (i = 0; i < ARRAY_SIZE(key_table); i++)
849 if (!strcasecmp(key_table[i].name, name))
850 return key_table[i].value;
852 if (strlen(name) == 1 && isprint(*name))
853 return (int) *name;
855 return ERR;
856 }
858 static char *
859 get_key(enum request request)
860 {
861 static char buf[BUFSIZ];
862 static char key_char[] = "'X'";
863 size_t pos = 0;
864 char *sep = " ";
865 int i;
867 buf[pos] = 0;
869 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
870 struct keybinding *keybinding = &default_keybindings[i];
871 char *seq = NULL;
872 int key;
874 if (keybinding->request != request)
875 continue;
877 for (key = 0; key < ARRAY_SIZE(key_table); key++)
878 if (key_table[key].value == keybinding->alias)
879 seq = key_table[key].name;
881 if (seq == NULL &&
882 keybinding->alias < 127 &&
883 isprint(keybinding->alias)) {
884 key_char[1] = (char) keybinding->alias;
885 seq = key_char;
886 }
888 if (!seq)
889 seq = "'?'";
891 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
892 return "Too many keybindings!";
893 sep = ", ";
894 }
896 return buf;
897 }
900 /*
901 * User config file handling.
902 */
904 static struct int_map color_map[] = {
905 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
906 COLOR_MAP(DEFAULT),
907 COLOR_MAP(BLACK),
908 COLOR_MAP(BLUE),
909 COLOR_MAP(CYAN),
910 COLOR_MAP(GREEN),
911 COLOR_MAP(MAGENTA),
912 COLOR_MAP(RED),
913 COLOR_MAP(WHITE),
914 COLOR_MAP(YELLOW),
915 };
917 #define set_color(color, name) \
918 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
920 static struct int_map attr_map[] = {
921 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
922 ATTR_MAP(NORMAL),
923 ATTR_MAP(BLINK),
924 ATTR_MAP(BOLD),
925 ATTR_MAP(DIM),
926 ATTR_MAP(REVERSE),
927 ATTR_MAP(STANDOUT),
928 ATTR_MAP(UNDERLINE),
929 };
931 #define set_attribute(attr, name) \
932 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
934 static int config_lineno;
935 static bool config_errors;
936 static char *config_msg;
938 /* Wants: object fgcolor bgcolor [attr] */
939 static int
940 option_color_command(int argc, char *argv[])
941 {
942 struct line_info *info;
944 if (argc != 3 && argc != 4) {
945 config_msg = "Wrong number of arguments given to color command";
946 return ERR;
947 }
949 info = get_line_info(argv[0], strlen(argv[0]));
950 if (!info) {
951 config_msg = "Unknown color name";
952 return ERR;
953 }
955 if (set_color(&info->fg, argv[1]) == ERR ||
956 set_color(&info->bg, argv[2]) == ERR) {
957 config_msg = "Unknown color";
958 return ERR;
959 }
961 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
962 config_msg = "Unknown attribute";
963 return ERR;
964 }
966 return OK;
967 }
969 /* Wants: name = value */
970 static int
971 option_set_command(int argc, char *argv[])
972 {
973 if (argc != 3) {
974 config_msg = "Wrong number of arguments given to set command";
975 return ERR;
976 }
978 if (strcmp(argv[1], "=")) {
979 config_msg = "No value assigned";
980 return ERR;
981 }
983 if (!strcmp(argv[0], "show-rev-graph")) {
984 opt_rev_graph = (!strcmp(argv[2], "1") ||
985 !strcmp(argv[2], "true") ||
986 !strcmp(argv[2], "yes"));
987 return OK;
988 }
990 if (!strcmp(argv[0], "line-number-interval")) {
991 opt_num_interval = atoi(argv[2]);
992 return OK;
993 }
995 if (!strcmp(argv[0], "tab-size")) {
996 opt_tab_size = atoi(argv[2]);
997 return OK;
998 }
1000 if (!strcmp(argv[0], "commit-encoding")) {
1001 char *arg = argv[2];
1002 int delimiter = *arg;
1003 int i;
1005 switch (delimiter) {
1006 case '"':
1007 case '\'':
1008 for (arg++, i = 0; arg[i]; i++)
1009 if (arg[i] == delimiter) {
1010 arg[i] = 0;
1011 break;
1012 }
1013 default:
1014 string_copy(opt_encoding, arg);
1015 return OK;
1016 }
1017 }
1019 config_msg = "Unknown variable name";
1020 return ERR;
1021 }
1023 /* Wants: mode request key */
1024 static int
1025 option_bind_command(int argc, char *argv[])
1026 {
1027 enum request request;
1028 int keymap;
1029 int key;
1031 if (argc != 3) {
1032 config_msg = "Wrong number of arguments given to bind command";
1033 return ERR;
1034 }
1036 if (set_keymap(&keymap, argv[0]) == ERR) {
1037 config_msg = "Unknown key map";
1038 return ERR;
1039 }
1041 key = get_key_value(argv[1]);
1042 if (key == ERR) {
1043 config_msg = "Unknown key";
1044 return ERR;
1045 }
1047 request = get_request(argv[2]);
1048 if (request == REQ_UNKNOWN) {
1049 config_msg = "Unknown request name";
1050 return ERR;
1051 }
1053 add_keybinding(keymap, request, key);
1055 return OK;
1056 }
1058 static int
1059 set_option(char *opt, char *value)
1060 {
1061 char *argv[16];
1062 int valuelen;
1063 int argc = 0;
1065 /* Tokenize */
1066 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1067 argv[argc++] = value;
1069 value += valuelen;
1070 if (!*value)
1071 break;
1073 *value++ = 0;
1074 while (isspace(*value))
1075 value++;
1076 }
1078 if (!strcmp(opt, "color"))
1079 return option_color_command(argc, argv);
1081 if (!strcmp(opt, "set"))
1082 return option_set_command(argc, argv);
1084 if (!strcmp(opt, "bind"))
1085 return option_bind_command(argc, argv);
1087 config_msg = "Unknown option command";
1088 return ERR;
1089 }
1091 static int
1092 read_option(char *opt, int optlen, char *value, int valuelen)
1093 {
1094 int status = OK;
1096 config_lineno++;
1097 config_msg = "Internal error";
1099 /* Check for comment markers, since read_properties() will
1100 * only ensure opt and value are split at first " \t". */
1101 optlen = strcspn(opt, "#");
1102 if (optlen == 0)
1103 return OK;
1105 if (opt[optlen] != 0) {
1106 config_msg = "No option value";
1107 status = ERR;
1109 } else {
1110 /* Look for comment endings in the value. */
1111 int len = strcspn(value, "#");
1113 if (len < valuelen) {
1114 valuelen = len;
1115 value[valuelen] = 0;
1116 }
1118 status = set_option(opt, value);
1119 }
1121 if (status == ERR) {
1122 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1123 config_lineno, optlen, opt, config_msg);
1124 config_errors = TRUE;
1125 }
1127 /* Always keep going if errors are encountered. */
1128 return OK;
1129 }
1131 static int
1132 load_options(void)
1133 {
1134 char *home = getenv("HOME");
1135 char buf[SIZEOF_STR];
1136 FILE *file;
1138 config_lineno = 0;
1139 config_errors = FALSE;
1141 if (!home || !string_format(buf, "%s/.tigrc", home))
1142 return ERR;
1144 /* It's ok that the file doesn't exist. */
1145 file = fopen(buf, "r");
1146 if (!file)
1147 return OK;
1149 if (read_properties(file, " \t", read_option) == ERR ||
1150 config_errors == TRUE)
1151 fprintf(stderr, "Errors while loading %s.\n", buf);
1153 return OK;
1154 }
1157 /*
1158 * The viewer
1159 */
1161 struct view;
1162 struct view_ops;
1164 /* The display array of active views and the index of the current view. */
1165 static struct view *display[2];
1166 static unsigned int current_view;
1168 /* Reading from the prompt? */
1169 static bool input_mode = FALSE;
1171 #define foreach_displayed_view(view, i) \
1172 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1174 #define displayed_views() (display[1] != NULL ? 2 : 1)
1176 /* Current head and commit ID */
1177 static char ref_blob[SIZEOF_REF] = "";
1178 static char ref_commit[SIZEOF_REF] = "HEAD";
1179 static char ref_head[SIZEOF_REF] = "HEAD";
1181 struct view {
1182 const char *name; /* View name */
1183 const char *cmd_fmt; /* Default command line format */
1184 const char *cmd_env; /* Command line set via environment */
1185 const char *id; /* Points to either of ref_{head,commit,blob} */
1187 struct view_ops *ops; /* View operations */
1189 enum keymap keymap; /* What keymap does this view have */
1191 char cmd[SIZEOF_STR]; /* Command buffer */
1192 char ref[SIZEOF_REF]; /* Hovered commit reference */
1193 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1195 int height, width; /* The width and height of the main window */
1196 WINDOW *win; /* The main window */
1197 WINDOW *title; /* The title window living below the main window */
1199 /* Navigation */
1200 unsigned long offset; /* Offset of the window top */
1201 unsigned long lineno; /* Current line number */
1203 /* Searching */
1204 char grep[SIZEOF_STR]; /* Search string */
1205 regex_t *regex; /* Pre-compiled regex */
1207 /* If non-NULL, points to the view that opened this view. If this view
1208 * is closed tig will switch back to the parent view. */
1209 struct view *parent;
1211 /* Buffering */
1212 unsigned long lines; /* Total number of lines */
1213 struct line *line; /* Line index */
1214 unsigned long line_size;/* Total number of allocated lines */
1215 unsigned int digits; /* Number of digits in the lines member. */
1217 /* Loading */
1218 FILE *pipe;
1219 time_t start_time;
1220 };
1222 struct view_ops {
1223 /* What type of content being displayed. Used in the title bar. */
1224 const char *type;
1225 /* Draw one line; @lineno must be < view->height. */
1226 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1227 /* Read one line; updates view->line. */
1228 bool (*read)(struct view *view, char *data);
1229 /* Depending on view, change display based on current line. */
1230 bool (*enter)(struct view *view, struct line *line);
1231 /* Search for regex in a line. */
1232 bool (*grep)(struct view *view, struct line *line);
1233 /* Select line */
1234 void (*select)(struct view *view, struct line *line);
1235 };
1237 static struct view_ops pager_ops;
1238 static struct view_ops main_ops;
1239 static struct view_ops tree_ops;
1240 static struct view_ops blob_ops;
1242 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1243 { name, cmd, #env, ref, ops, map}
1245 #define VIEW_(id, name, ops, ref) \
1246 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1249 static struct view views[] = {
1250 VIEW_(MAIN, "main", &main_ops, ref_head),
1251 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1252 VIEW_(LOG, "log", &pager_ops, ref_head),
1253 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1254 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1255 VIEW_(HELP, "help", &pager_ops, "static"),
1256 VIEW_(PAGER, "pager", &pager_ops, "static"),
1257 };
1259 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1261 #define foreach_view(view, i) \
1262 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1264 #define view_is_displayed(view) \
1265 (view == display[0] || view == display[1])
1267 static bool
1268 draw_view_line(struct view *view, unsigned int lineno)
1269 {
1270 struct line *line;
1271 bool selected = (view->offset + lineno == view->lineno);
1272 bool draw_ok;
1274 assert(view_is_displayed(view));
1276 if (view->offset + lineno >= view->lines)
1277 return FALSE;
1279 line = &view->line[view->offset + lineno];
1281 if (selected) {
1282 line->selected = TRUE;
1283 view->ops->select(view, line);
1284 } else if (line->selected) {
1285 line->selected = FALSE;
1286 wmove(view->win, lineno, 0);
1287 wclrtoeol(view->win);
1288 }
1290 scrollok(view->win, FALSE);
1291 draw_ok = view->ops->draw(view, line, lineno, selected);
1292 scrollok(view->win, TRUE);
1294 return draw_ok;
1295 }
1297 static void
1298 redraw_view_from(struct view *view, int lineno)
1299 {
1300 assert(0 <= lineno && lineno < view->height);
1302 for (; lineno < view->height; lineno++) {
1303 if (!draw_view_line(view, lineno))
1304 break;
1305 }
1307 redrawwin(view->win);
1308 if (input_mode)
1309 wnoutrefresh(view->win);
1310 else
1311 wrefresh(view->win);
1312 }
1314 static void
1315 redraw_view(struct view *view)
1316 {
1317 wclear(view->win);
1318 redraw_view_from(view, 0);
1319 }
1322 static void
1323 update_view_title(struct view *view)
1324 {
1325 char buf[SIZEOF_STR];
1326 char state[SIZEOF_STR];
1327 size_t bufpos = 0, statelen = 0;
1329 assert(view_is_displayed(view));
1331 if (view->lines || view->pipe) {
1332 unsigned int view_lines = view->offset + view->height;
1333 unsigned int lines = view->lines
1334 ? MIN(view_lines, view->lines) * 100 / view->lines
1335 : 0;
1337 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1338 view->ops->type,
1339 view->lineno + 1,
1340 view->lines,
1341 lines);
1343 if (view->pipe) {
1344 time_t secs = time(NULL) - view->start_time;
1346 /* Three git seconds are a long time ... */
1347 if (secs > 2)
1348 string_format_from(state, &statelen, " %lds", secs);
1349 }
1350 }
1352 string_format_from(buf, &bufpos, "[%s]", view->name);
1353 if (*view->ref && bufpos < view->width) {
1354 size_t refsize = strlen(view->ref);
1355 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1357 if (minsize < view->width)
1358 refsize = view->width - minsize + 7;
1359 string_format_from(buf, &bufpos, " %.*s", refsize, view->ref);
1360 }
1362 if (statelen && bufpos < view->width) {
1363 string_format_from(buf, &bufpos, " %s", state);
1364 }
1366 if (view == display[current_view])
1367 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1368 else
1369 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1371 werase(view->title);
1372 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1373 wmove(view->title, 0, view->width - 1);
1375 if (input_mode)
1376 wnoutrefresh(view->title);
1377 else
1378 wrefresh(view->title);
1379 }
1381 static void
1382 resize_display(void)
1383 {
1384 int offset, i;
1385 struct view *base = display[0];
1386 struct view *view = display[1] ? display[1] : display[0];
1388 /* Setup window dimensions */
1390 getmaxyx(stdscr, base->height, base->width);
1392 /* Make room for the status window. */
1393 base->height -= 1;
1395 if (view != base) {
1396 /* Horizontal split. */
1397 view->width = base->width;
1398 view->height = SCALE_SPLIT_VIEW(base->height);
1399 base->height -= view->height;
1401 /* Make room for the title bar. */
1402 view->height -= 1;
1403 }
1405 /* Make room for the title bar. */
1406 base->height -= 1;
1408 offset = 0;
1410 foreach_displayed_view (view, i) {
1411 if (!view->win) {
1412 view->win = newwin(view->height, 0, offset, 0);
1413 if (!view->win)
1414 die("Failed to create %s view", view->name);
1416 scrollok(view->win, TRUE);
1418 view->title = newwin(1, 0, offset + view->height, 0);
1419 if (!view->title)
1420 die("Failed to create title window");
1422 } else {
1423 wresize(view->win, view->height, view->width);
1424 mvwin(view->win, offset, 0);
1425 mvwin(view->title, offset + view->height, 0);
1426 }
1428 offset += view->height + 1;
1429 }
1430 }
1432 static void
1433 redraw_display(void)
1434 {
1435 struct view *view;
1436 int i;
1438 foreach_displayed_view (view, i) {
1439 redraw_view(view);
1440 update_view_title(view);
1441 }
1442 }
1444 static void
1445 update_display_cursor(struct view *view)
1446 {
1447 /* Move the cursor to the right-most column of the cursor line.
1448 *
1449 * XXX: This could turn out to be a bit expensive, but it ensures that
1450 * the cursor does not jump around. */
1451 if (view->lines) {
1452 wmove(view->win, view->lineno - view->offset, view->width - 1);
1453 wrefresh(view->win);
1454 }
1455 }
1457 /*
1458 * Navigation
1459 */
1461 /* Scrolling backend */
1462 static void
1463 do_scroll_view(struct view *view, int lines)
1464 {
1465 bool redraw_current_line = FALSE;
1467 /* The rendering expects the new offset. */
1468 view->offset += lines;
1470 assert(0 <= view->offset && view->offset < view->lines);
1471 assert(lines);
1473 /* Move current line into the view. */
1474 if (view->lineno < view->offset) {
1475 view->lineno = view->offset;
1476 redraw_current_line = TRUE;
1477 } else if (view->lineno >= view->offset + view->height) {
1478 view->lineno = view->offset + view->height - 1;
1479 redraw_current_line = TRUE;
1480 }
1482 assert(view->offset <= view->lineno && view->lineno < view->lines);
1484 /* Redraw the whole screen if scrolling is pointless. */
1485 if (view->height < ABS(lines)) {
1486 redraw_view(view);
1488 } else {
1489 int line = lines > 0 ? view->height - lines : 0;
1490 int end = line + ABS(lines);
1492 wscrl(view->win, lines);
1494 for (; line < end; line++) {
1495 if (!draw_view_line(view, line))
1496 break;
1497 }
1499 if (redraw_current_line)
1500 draw_view_line(view, view->lineno - view->offset);
1501 }
1503 redrawwin(view->win);
1504 wrefresh(view->win);
1505 report("");
1506 }
1508 /* Scroll frontend */
1509 static void
1510 scroll_view(struct view *view, enum request request)
1511 {
1512 int lines = 1;
1514 assert(view_is_displayed(view));
1516 switch (request) {
1517 case REQ_SCROLL_PAGE_DOWN:
1518 lines = view->height;
1519 case REQ_SCROLL_LINE_DOWN:
1520 if (view->offset + lines > view->lines)
1521 lines = view->lines - view->offset;
1523 if (lines == 0 || view->offset + view->height >= view->lines) {
1524 report("Cannot scroll beyond the last line");
1525 return;
1526 }
1527 break;
1529 case REQ_SCROLL_PAGE_UP:
1530 lines = view->height;
1531 case REQ_SCROLL_LINE_UP:
1532 if (lines > view->offset)
1533 lines = view->offset;
1535 if (lines == 0) {
1536 report("Cannot scroll beyond the first line");
1537 return;
1538 }
1540 lines = -lines;
1541 break;
1543 default:
1544 die("request %d not handled in switch", request);
1545 }
1547 do_scroll_view(view, lines);
1548 }
1550 /* Cursor moving */
1551 static void
1552 move_view(struct view *view, enum request request)
1553 {
1554 int scroll_steps = 0;
1555 int steps;
1557 switch (request) {
1558 case REQ_MOVE_FIRST_LINE:
1559 steps = -view->lineno;
1560 break;
1562 case REQ_MOVE_LAST_LINE:
1563 steps = view->lines - view->lineno - 1;
1564 break;
1566 case REQ_MOVE_PAGE_UP:
1567 steps = view->height > view->lineno
1568 ? -view->lineno : -view->height;
1569 break;
1571 case REQ_MOVE_PAGE_DOWN:
1572 steps = view->lineno + view->height >= view->lines
1573 ? view->lines - view->lineno - 1 : view->height;
1574 break;
1576 case REQ_MOVE_UP:
1577 steps = -1;
1578 break;
1580 case REQ_MOVE_DOWN:
1581 steps = 1;
1582 break;
1584 default:
1585 die("request %d not handled in switch", request);
1586 }
1588 if (steps <= 0 && view->lineno == 0) {
1589 report("Cannot move beyond the first line");
1590 return;
1592 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1593 report("Cannot move beyond the last line");
1594 return;
1595 }
1597 /* Move the current line */
1598 view->lineno += steps;
1599 assert(0 <= view->lineno && view->lineno < view->lines);
1601 /* Check whether the view needs to be scrolled */
1602 if (view->lineno < view->offset ||
1603 view->lineno >= view->offset + view->height) {
1604 scroll_steps = steps;
1605 if (steps < 0 && -steps > view->offset) {
1606 scroll_steps = -view->offset;
1608 } else if (steps > 0) {
1609 if (view->lineno == view->lines - 1 &&
1610 view->lines > view->height) {
1611 scroll_steps = view->lines - view->offset - 1;
1612 if (scroll_steps >= view->height)
1613 scroll_steps -= view->height - 1;
1614 }
1615 }
1616 }
1618 if (!view_is_displayed(view)) {
1619 view->offset += steps;
1620 view->ops->select(view, &view->line[view->lineno]);
1621 return;
1622 }
1624 /* Repaint the old "current" line if we be scrolling */
1625 if (ABS(steps) < view->height)
1626 draw_view_line(view, view->lineno - steps - view->offset);
1628 if (scroll_steps) {
1629 do_scroll_view(view, scroll_steps);
1630 return;
1631 }
1633 /* Draw the current line */
1634 draw_view_line(view, view->lineno - view->offset);
1636 redrawwin(view->win);
1637 wrefresh(view->win);
1638 report("");
1639 }
1642 /*
1643 * Searching
1644 */
1646 static void search_view(struct view *view, enum request request);
1648 static bool
1649 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1650 {
1651 assert(view_is_displayed(view));
1653 if (!view->ops->grep(view, line))
1654 return FALSE;
1656 if (lineno - view->offset >= view->height) {
1657 view->offset = lineno;
1658 view->lineno = lineno;
1659 redraw_view(view);
1661 } else {
1662 unsigned long old_lineno = view->lineno - view->offset;
1664 view->lineno = lineno;
1665 draw_view_line(view, old_lineno);
1667 draw_view_line(view, view->lineno - view->offset);
1668 redrawwin(view->win);
1669 wrefresh(view->win);
1670 }
1672 report("Line %ld matches '%s'", lineno + 1, view->grep);
1673 return TRUE;
1674 }
1676 static void
1677 find_next(struct view *view, enum request request)
1678 {
1679 unsigned long lineno = view->lineno;
1680 int direction;
1682 if (!*view->grep) {
1683 if (!*opt_search)
1684 report("No previous search");
1685 else
1686 search_view(view, request);
1687 return;
1688 }
1690 switch (request) {
1691 case REQ_SEARCH:
1692 case REQ_FIND_NEXT:
1693 direction = 1;
1694 break;
1696 case REQ_SEARCH_BACK:
1697 case REQ_FIND_PREV:
1698 direction = -1;
1699 break;
1701 default:
1702 return;
1703 }
1705 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1706 lineno += direction;
1708 /* Note, lineno is unsigned long so will wrap around in which case it
1709 * will become bigger than view->lines. */
1710 for (; lineno < view->lines; lineno += direction) {
1711 struct line *line = &view->line[lineno];
1713 if (find_next_line(view, lineno, line))
1714 return;
1715 }
1717 report("No match found for '%s'", view->grep);
1718 }
1720 static void
1721 search_view(struct view *view, enum request request)
1722 {
1723 int regex_err;
1725 if (view->regex) {
1726 regfree(view->regex);
1727 *view->grep = 0;
1728 } else {
1729 view->regex = calloc(1, sizeof(*view->regex));
1730 if (!view->regex)
1731 return;
1732 }
1734 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1735 if (regex_err != 0) {
1736 char buf[SIZEOF_STR] = "unknown error";
1738 regerror(regex_err, view->regex, buf, sizeof(buf));
1739 report("Search failed: %s", buf);
1740 return;
1741 }
1743 string_copy(view->grep, opt_search);
1745 find_next(view, request);
1746 }
1748 /*
1749 * Incremental updating
1750 */
1752 static void
1753 end_update(struct view *view)
1754 {
1755 if (!view->pipe)
1756 return;
1757 set_nonblocking_input(FALSE);
1758 if (view->pipe == stdin)
1759 fclose(view->pipe);
1760 else
1761 pclose(view->pipe);
1762 view->pipe = NULL;
1763 }
1765 static bool
1766 begin_update(struct view *view)
1767 {
1768 const char *id = view->id;
1770 if (view->pipe)
1771 end_update(view);
1773 if (opt_cmd[0]) {
1774 string_copy(view->cmd, opt_cmd);
1775 opt_cmd[0] = 0;
1776 /* When running random commands, the view ref could have become
1777 * invalid so clear it. */
1778 view->ref[0] = 0;
1780 } else if (view == VIEW(REQ_VIEW_TREE)) {
1781 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1783 if (strcmp(view->vid, view->id))
1784 opt_path[0] = 0;
1786 if (!string_format(view->cmd, format, id, opt_path))
1787 return FALSE;
1789 } else {
1790 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1792 if (!string_format(view->cmd, format, id, id, id, id, id))
1793 return FALSE;
1794 }
1796 /* Special case for the pager view. */
1797 if (opt_pipe) {
1798 view->pipe = opt_pipe;
1799 opt_pipe = NULL;
1800 } else {
1801 view->pipe = popen(view->cmd, "r");
1802 }
1804 if (!view->pipe)
1805 return FALSE;
1807 set_nonblocking_input(TRUE);
1809 view->offset = 0;
1810 view->lines = 0;
1811 view->lineno = 0;
1812 string_copy(view->vid, id);
1814 if (view->line) {
1815 int i;
1817 for (i = 0; i < view->lines; i++)
1818 if (view->line[i].data)
1819 free(view->line[i].data);
1821 free(view->line);
1822 view->line = NULL;
1823 }
1825 view->start_time = time(NULL);
1827 return TRUE;
1828 }
1830 static struct line *
1831 realloc_lines(struct view *view, size_t line_size)
1832 {
1833 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1835 if (!tmp)
1836 return NULL;
1838 view->line = tmp;
1839 view->line_size = line_size;
1840 return view->line;
1841 }
1843 static bool
1844 update_view(struct view *view)
1845 {
1846 char in_buffer[BUFSIZ];
1847 char out_buffer[BUFSIZ * 2];
1848 char *line;
1849 /* The number of lines to read. If too low it will cause too much
1850 * redrawing (and possible flickering), if too high responsiveness
1851 * will suffer. */
1852 unsigned long lines = view->height;
1853 int redraw_from = -1;
1855 if (!view->pipe)
1856 return TRUE;
1858 /* Only redraw if lines are visible. */
1859 if (view->offset + view->height >= view->lines)
1860 redraw_from = view->lines - view->offset;
1862 /* FIXME: This is probably not perfect for backgrounded views. */
1863 if (!realloc_lines(view, view->lines + lines))
1864 goto alloc_error;
1866 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1867 size_t linelen = strlen(line);
1869 if (linelen)
1870 line[linelen - 1] = 0;
1872 if (opt_iconv != ICONV_NONE) {
1873 char *inbuf = line;
1874 size_t inlen = linelen;
1876 char *outbuf = out_buffer;
1877 size_t outlen = sizeof(out_buffer);
1879 size_t ret;
1881 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1882 if (ret != (size_t) -1) {
1883 line = out_buffer;
1884 linelen = strlen(out_buffer);
1885 }
1886 }
1888 if (!view->ops->read(view, line))
1889 goto alloc_error;
1891 if (lines-- == 1)
1892 break;
1893 }
1895 {
1896 int digits;
1898 lines = view->lines;
1899 for (digits = 0; lines; digits++)
1900 lines /= 10;
1902 /* Keep the displayed view in sync with line number scaling. */
1903 if (digits != view->digits) {
1904 view->digits = digits;
1905 redraw_from = 0;
1906 }
1907 }
1909 if (!view_is_displayed(view))
1910 goto check_pipe;
1912 if (view == VIEW(REQ_VIEW_TREE)) {
1913 /* Clear the view and redraw everything since the tree sorting
1914 * might have rearranged things. */
1915 redraw_view(view);
1917 } else if (redraw_from >= 0) {
1918 /* If this is an incremental update, redraw the previous line
1919 * since for commits some members could have changed when
1920 * loading the main view. */
1921 if (redraw_from > 0)
1922 redraw_from--;
1924 /* Incrementally draw avoids flickering. */
1925 redraw_view_from(view, redraw_from);
1926 }
1928 /* Update the title _after_ the redraw so that if the redraw picks up a
1929 * commit reference in view->ref it'll be available here. */
1930 update_view_title(view);
1932 check_pipe:
1933 if (ferror(view->pipe)) {
1934 report("Failed to read: %s", strerror(errno));
1935 goto end;
1937 } else if (feof(view->pipe)) {
1938 report("");
1939 goto end;
1940 }
1942 return TRUE;
1944 alloc_error:
1945 report("Allocation failure");
1947 end:
1948 end_update(view);
1949 return FALSE;
1950 }
1953 /*
1954 * View opening
1955 */
1957 static void open_help_view(struct view *view)
1958 {
1959 char buf[BUFSIZ];
1960 int lines = ARRAY_SIZE(req_info) + 2;
1961 int i;
1963 if (view->lines > 0)
1964 return;
1966 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1967 if (!req_info[i].request)
1968 lines++;
1970 view->line = calloc(lines, sizeof(*view->line));
1971 if (!view->line) {
1972 report("Allocation failure");
1973 return;
1974 }
1976 view->ops->read(view, "Quick reference for tig keybindings:");
1978 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1979 char *key;
1981 if (!req_info[i].request) {
1982 view->ops->read(view, "");
1983 view->ops->read(view, req_info[i].help);
1984 continue;
1985 }
1987 key = get_key(req_info[i].request);
1988 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1989 continue;
1991 view->ops->read(view, buf);
1992 }
1993 }
1995 enum open_flags {
1996 OPEN_DEFAULT = 0, /* Use default view switching. */
1997 OPEN_SPLIT = 1, /* Split current view. */
1998 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1999 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2000 };
2002 static void
2003 open_view(struct view *prev, enum request request, enum open_flags flags)
2004 {
2005 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2006 bool split = !!(flags & OPEN_SPLIT);
2007 bool reload = !!(flags & OPEN_RELOAD);
2008 struct view *view = VIEW(request);
2009 int nviews = displayed_views();
2010 struct view *base_view = display[0];
2012 if (view == prev && nviews == 1 && !reload) {
2013 report("Already in %s view", view->name);
2014 return;
2015 }
2017 if (view == VIEW(REQ_VIEW_HELP)) {
2018 open_help_view(view);
2020 } else if ((reload || strcmp(view->vid, view->id)) &&
2021 !begin_update(view)) {
2022 report("Failed to load %s view", view->name);
2023 return;
2024 }
2026 if (split) {
2027 display[1] = view;
2028 if (!backgrounded)
2029 current_view = 1;
2030 } else {
2031 /* Maximize the current view. */
2032 memset(display, 0, sizeof(display));
2033 current_view = 0;
2034 display[current_view] = view;
2035 }
2037 /* Resize the view when switching between split- and full-screen,
2038 * or when switching between two different full-screen views. */
2039 if (nviews != displayed_views() ||
2040 (nviews == 1 && base_view != display[0]))
2041 resize_display();
2043 if (split && prev->lineno - prev->offset >= prev->height) {
2044 /* Take the title line into account. */
2045 int lines = prev->lineno - prev->offset - prev->height + 1;
2047 /* Scroll the view that was split if the current line is
2048 * outside the new limited view. */
2049 do_scroll_view(prev, lines);
2050 }
2052 if (prev && view != prev) {
2053 if (split && !backgrounded) {
2054 /* "Blur" the previous view. */
2055 update_view_title(prev);
2056 }
2058 view->parent = prev;
2059 }
2061 if (view->pipe && view->lines == 0) {
2062 /* Clear the old view and let the incremental updating refill
2063 * the screen. */
2064 wclear(view->win);
2065 report("");
2066 } else {
2067 redraw_view(view);
2068 report("");
2069 }
2071 /* If the view is backgrounded the above calls to report()
2072 * won't redraw the view title. */
2073 if (backgrounded)
2074 update_view_title(view);
2075 }
2078 /*
2079 * User request switch noodle
2080 */
2082 static int
2083 view_driver(struct view *view, enum request request)
2084 {
2085 int i;
2087 switch (request) {
2088 case REQ_MOVE_UP:
2089 case REQ_MOVE_DOWN:
2090 case REQ_MOVE_PAGE_UP:
2091 case REQ_MOVE_PAGE_DOWN:
2092 case REQ_MOVE_FIRST_LINE:
2093 case REQ_MOVE_LAST_LINE:
2094 move_view(view, request);
2095 break;
2097 case REQ_SCROLL_LINE_DOWN:
2098 case REQ_SCROLL_LINE_UP:
2099 case REQ_SCROLL_PAGE_DOWN:
2100 case REQ_SCROLL_PAGE_UP:
2101 scroll_view(view, request);
2102 break;
2104 case REQ_VIEW_BLOB:
2105 if (!ref_blob[0]) {
2106 report("No file chosen, press 't' to open tree view");
2107 break;
2108 }
2109 /* Fall-through */
2110 case REQ_VIEW_MAIN:
2111 case REQ_VIEW_DIFF:
2112 case REQ_VIEW_LOG:
2113 case REQ_VIEW_TREE:
2114 case REQ_VIEW_HELP:
2115 case REQ_VIEW_PAGER:
2116 open_view(view, request, OPEN_DEFAULT);
2117 break;
2119 case REQ_NEXT:
2120 case REQ_PREVIOUS:
2121 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2123 if ((view == VIEW(REQ_VIEW_DIFF) &&
2124 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2125 (view == VIEW(REQ_VIEW_BLOB) &&
2126 view->parent == VIEW(REQ_VIEW_TREE))) {
2127 view = view->parent;
2128 move_view(view, request);
2129 if (view_is_displayed(view))
2130 update_view_title(view);
2131 } else {
2132 move_view(view, request);
2133 break;
2134 }
2135 /* Fall-through */
2137 case REQ_ENTER:
2138 if (!view->lines) {
2139 report("Nothing to enter");
2140 break;
2141 }
2142 return view->ops->enter(view, &view->line[view->lineno]);
2144 case REQ_VIEW_NEXT:
2145 {
2146 int nviews = displayed_views();
2147 int next_view = (current_view + 1) % nviews;
2149 if (next_view == current_view) {
2150 report("Only one view is displayed");
2151 break;
2152 }
2154 current_view = next_view;
2155 /* Blur out the title of the previous view. */
2156 update_view_title(view);
2157 report("");
2158 break;
2159 }
2160 case REQ_TOGGLE_LINENO:
2161 opt_line_number = !opt_line_number;
2162 redraw_display();
2163 break;
2165 case REQ_TOGGLE_REV_GRAPH:
2166 opt_rev_graph = !opt_rev_graph;
2167 redraw_display();
2168 break;
2170 case REQ_PROMPT:
2171 /* Always reload^Wrerun commands from the prompt. */
2172 open_view(view, opt_request, OPEN_RELOAD);
2173 break;
2175 case REQ_SEARCH:
2176 case REQ_SEARCH_BACK:
2177 search_view(view, request);
2178 break;
2180 case REQ_FIND_NEXT:
2181 case REQ_FIND_PREV:
2182 find_next(view, request);
2183 break;
2185 case REQ_STOP_LOADING:
2186 for (i = 0; i < ARRAY_SIZE(views); i++) {
2187 view = &views[i];
2188 if (view->pipe)
2189 report("Stopped loading the %s view", view->name),
2190 end_update(view);
2191 }
2192 break;
2194 case REQ_SHOW_VERSION:
2195 report("%s (built %s)", VERSION, __DATE__);
2196 return TRUE;
2198 case REQ_SCREEN_RESIZE:
2199 resize_display();
2200 /* Fall-through */
2201 case REQ_SCREEN_REDRAW:
2202 redraw_display();
2203 break;
2205 case REQ_NONE:
2206 doupdate();
2207 return TRUE;
2209 case REQ_VIEW_CLOSE:
2210 /* XXX: Mark closed views by letting view->parent point to the
2211 * view itself. Parents to closed view should never be
2212 * followed. */
2213 if (view->parent &&
2214 view->parent->parent != view->parent) {
2215 memset(display, 0, sizeof(display));
2216 current_view = 0;
2217 display[current_view] = view->parent;
2218 view->parent = view;
2219 resize_display();
2220 redraw_display();
2221 break;
2222 }
2223 /* Fall-through */
2224 case REQ_QUIT:
2225 return FALSE;
2227 default:
2228 /* An unknown key will show most commonly used commands. */
2229 report("Unknown key, press 'h' for help");
2230 return TRUE;
2231 }
2233 return TRUE;
2234 }
2237 /*
2238 * Pager backend
2239 */
2241 static bool
2242 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2243 {
2244 char *text = line->data;
2245 enum line_type type = line->type;
2246 int textlen = strlen(text);
2247 int attr;
2249 wmove(view->win, lineno, 0);
2251 if (selected) {
2252 type = LINE_CURSOR;
2253 wchgat(view->win, -1, 0, type, NULL);
2254 }
2256 attr = get_line_attr(type);
2257 wattrset(view->win, attr);
2259 if (opt_line_number || opt_tab_size < TABSIZE) {
2260 static char spaces[] = " ";
2261 int col_offset = 0, col = 0;
2263 if (opt_line_number) {
2264 unsigned long real_lineno = view->offset + lineno + 1;
2266 if (real_lineno == 1 ||
2267 (real_lineno % opt_num_interval) == 0) {
2268 wprintw(view->win, "%.*d", view->digits, real_lineno);
2270 } else {
2271 waddnstr(view->win, spaces,
2272 MIN(view->digits, STRING_SIZE(spaces)));
2273 }
2274 waddstr(view->win, ": ");
2275 col_offset = view->digits + 2;
2276 }
2278 while (text && col_offset + col < view->width) {
2279 int cols_max = view->width - col_offset - col;
2280 char *pos = text;
2281 int cols;
2283 if (*text == '\t') {
2284 text++;
2285 assert(sizeof(spaces) > TABSIZE);
2286 pos = spaces;
2287 cols = opt_tab_size - (col % opt_tab_size);
2289 } else {
2290 text = strchr(text, '\t');
2291 cols = line ? text - pos : strlen(pos);
2292 }
2294 waddnstr(view->win, pos, MIN(cols, cols_max));
2295 col += cols;
2296 }
2298 } else {
2299 int col = 0, pos = 0;
2301 for (; pos < textlen && col < view->width; pos++, col++)
2302 if (text[pos] == '\t')
2303 col += TABSIZE - (col % TABSIZE) - 1;
2305 waddnstr(view->win, text, pos);
2306 }
2308 return TRUE;
2309 }
2311 static bool
2312 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2313 {
2314 char refbuf[SIZEOF_STR];
2315 char *ref = NULL;
2316 FILE *pipe;
2318 if (!string_format(refbuf, "git describe %s", commit_id))
2319 return TRUE;
2321 pipe = popen(refbuf, "r");
2322 if (!pipe)
2323 return TRUE;
2325 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2326 ref = chomp_string(ref);
2327 pclose(pipe);
2329 if (!ref || !*ref)
2330 return TRUE;
2332 /* This is the only fatal call, since it can "corrupt" the buffer. */
2333 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2334 return FALSE;
2336 return TRUE;
2337 }
2339 static void
2340 add_pager_refs(struct view *view, struct line *line)
2341 {
2342 char buf[SIZEOF_STR];
2343 char *commit_id = line->data + STRING_SIZE("commit ");
2344 struct ref **refs;
2345 size_t bufpos = 0, refpos = 0;
2346 const char *sep = "Refs: ";
2347 bool is_tag = FALSE;
2349 assert(line->type == LINE_COMMIT);
2351 refs = get_refs(commit_id);
2352 if (!refs) {
2353 if (view == VIEW(REQ_VIEW_DIFF))
2354 goto try_add_describe_ref;
2355 return;
2356 }
2358 do {
2359 struct ref *ref = refs[refpos];
2360 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2362 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2363 return;
2364 sep = ", ";
2365 if (ref->tag)
2366 is_tag = TRUE;
2367 } while (refs[refpos++]->next);
2369 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2370 try_add_describe_ref:
2371 /* Add <tag>-g<commit_id> "fake" reference. */
2372 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2373 return;
2374 }
2376 if (bufpos == 0)
2377 return;
2379 if (!realloc_lines(view, view->line_size + 1))
2380 return;
2382 line = &view->line[view->lines];
2383 line->data = strdup(buf);
2384 if (!line->data)
2385 return;
2387 line->type = LINE_PP_REFS;
2388 view->lines++;
2389 }
2391 static bool
2392 pager_read(struct view *view, char *data)
2393 {
2394 struct line *line = &view->line[view->lines];
2396 line->data = strdup(data);
2397 if (!line->data)
2398 return FALSE;
2400 line->type = get_line_type(line->data);
2401 view->lines++;
2403 if (line->type == LINE_COMMIT &&
2404 (view == VIEW(REQ_VIEW_DIFF) ||
2405 view == VIEW(REQ_VIEW_LOG)))
2406 add_pager_refs(view, line);
2408 return TRUE;
2409 }
2411 static bool
2412 pager_enter(struct view *view, struct line *line)
2413 {
2414 int split = 0;
2416 if (line->type == LINE_COMMIT &&
2417 (view == VIEW(REQ_VIEW_LOG) ||
2418 view == VIEW(REQ_VIEW_PAGER))) {
2419 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2420 split = 1;
2421 }
2423 /* Always scroll the view even if it was split. That way
2424 * you can use Enter to scroll through the log view and
2425 * split open each commit diff. */
2426 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2428 /* FIXME: A minor workaround. Scrolling the view will call report("")
2429 * but if we are scrolling a non-current view this won't properly
2430 * update the view title. */
2431 if (split)
2432 update_view_title(view);
2434 return TRUE;
2435 }
2437 static bool
2438 pager_grep(struct view *view, struct line *line)
2439 {
2440 regmatch_t pmatch;
2441 char *text = line->data;
2443 if (!*text)
2444 return FALSE;
2446 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2447 return FALSE;
2449 return TRUE;
2450 }
2452 static void
2453 pager_select(struct view *view, struct line *line)
2454 {
2455 if (line->type == LINE_COMMIT) {
2456 char *text = line->data;
2458 string_copy(view->ref, text + STRING_SIZE("commit "));
2459 string_copy(ref_commit, view->ref);
2460 }
2461 }
2463 static struct view_ops pager_ops = {
2464 "line",
2465 pager_draw,
2466 pager_read,
2467 pager_enter,
2468 pager_grep,
2469 pager_select,
2470 };
2473 /*
2474 * Tree backend
2475 */
2477 /* Parse output from git-ls-tree(1):
2478 *
2479 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2480 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2481 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2482 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2483 */
2485 #define SIZEOF_TREE_ATTR \
2486 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2488 #define TREE_UP_FORMAT "040000 tree %s\t.."
2490 static int
2491 tree_compare_entry(enum line_type type1, char *name1,
2492 enum line_type type2, char *name2)
2493 {
2494 if (type1 != type2) {
2495 if (type1 == LINE_TREE_DIR)
2496 return -1;
2497 return 1;
2498 }
2500 return strcmp(name1, name2);
2501 }
2503 static bool
2504 tree_read(struct view *view, char *text)
2505 {
2506 size_t textlen = strlen(text);
2507 char buf[SIZEOF_STR];
2508 unsigned long pos;
2509 enum line_type type;
2510 bool first_read = view->lines == 0;
2512 if (textlen <= SIZEOF_TREE_ATTR)
2513 return FALSE;
2515 type = text[STRING_SIZE("100644 ")] == 't'
2516 ? LINE_TREE_DIR : LINE_TREE_FILE;
2518 if (first_read) {
2519 /* Add path info line */
2520 if (string_format(buf, "Directory path /%s", opt_path) &&
2521 realloc_lines(view, view->line_size + 1) &&
2522 pager_read(view, buf))
2523 view->line[view->lines - 1].type = LINE_DEFAULT;
2524 else
2525 return FALSE;
2527 /* Insert "link" to parent directory. */
2528 if (*opt_path &&
2529 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2530 realloc_lines(view, view->line_size + 1) &&
2531 pager_read(view, buf))
2532 view->line[view->lines - 1].type = LINE_TREE_DIR;
2533 else if (*opt_path)
2534 return FALSE;
2535 }
2537 /* Strip the path part ... */
2538 if (*opt_path) {
2539 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2540 size_t striplen = strlen(opt_path);
2541 char *path = text + SIZEOF_TREE_ATTR;
2543 if (pathlen > striplen)
2544 memmove(path, path + striplen,
2545 pathlen - striplen + 1);
2546 }
2548 /* Skip "Directory ..." and ".." line. */
2549 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2550 struct line *line = &view->line[pos];
2551 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2552 char *path2 = text + SIZEOF_TREE_ATTR;
2553 int cmp = tree_compare_entry(line->type, path1, type, path2);
2555 if (cmp <= 0)
2556 continue;
2558 text = strdup(text);
2559 if (!text)
2560 return FALSE;
2562 if (view->lines > pos)
2563 memmove(&view->line[pos + 1], &view->line[pos],
2564 (view->lines - pos) * sizeof(*line));
2566 line = &view->line[pos];
2567 line->data = text;
2568 line->type = type;
2569 view->lines++;
2570 return TRUE;
2571 }
2573 if (!pager_read(view, text))
2574 return FALSE;
2576 /* Move the current line to the first tree entry. */
2577 if (first_read)
2578 view->lineno++;
2580 view->line[view->lines - 1].type = type;
2581 return TRUE;
2582 }
2584 static bool
2585 tree_enter(struct view *view, struct line *line)
2586 {
2587 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2588 enum request request;
2590 switch (line->type) {
2591 case LINE_TREE_DIR:
2592 /* Depending on whether it is a subdir or parent (updir?) link
2593 * mangle the path buffer. */
2594 if (line == &view->line[1] && *opt_path) {
2595 size_t path_len = strlen(opt_path);
2596 char *dirsep = opt_path + path_len - 1;
2598 while (dirsep > opt_path && dirsep[-1] != '/')
2599 dirsep--;
2601 dirsep[0] = 0;
2603 } else {
2604 size_t pathlen = strlen(opt_path);
2605 size_t origlen = pathlen;
2606 char *data = line->data;
2607 char *basename = data + SIZEOF_TREE_ATTR;
2609 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2610 opt_path[origlen] = 0;
2611 return TRUE;
2612 }
2613 }
2615 /* Trees and subtrees share the same ID, so they are not not
2616 * unique like blobs. */
2617 flags |= OPEN_RELOAD;
2618 request = REQ_VIEW_TREE;
2619 break;
2621 case LINE_TREE_FILE:
2622 request = REQ_VIEW_BLOB;
2623 break;
2625 default:
2626 return TRUE;
2627 }
2629 open_view(view, request, flags);
2631 return TRUE;
2632 }
2634 static void
2635 tree_select(struct view *view, struct line *line)
2636 {
2637 char *text = line->data;
2639 text += STRING_SIZE("100644 blob ");
2641 if (line->type == LINE_TREE_FILE) {
2642 string_ncopy(ref_blob, text, 40);
2643 /* Also update the blob view's ref, since all there must always
2644 * be in sync. */
2645 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2647 } else if (line->type != LINE_TREE_DIR) {
2648 return;
2649 }
2651 string_ncopy(view->ref, text, 40);
2652 }
2654 static struct view_ops tree_ops = {
2655 "file",
2656 pager_draw,
2657 tree_read,
2658 tree_enter,
2659 pager_grep,
2660 tree_select,
2661 };
2663 static bool
2664 blob_read(struct view *view, char *line)
2665 {
2666 bool state = pager_read(view, line);
2668 if (state == TRUE)
2669 view->line[view->lines - 1].type = LINE_DEFAULT;
2671 return state;
2672 }
2674 static struct view_ops blob_ops = {
2675 "line",
2676 pager_draw,
2677 blob_read,
2678 pager_enter,
2679 pager_grep,
2680 pager_select,
2681 };
2684 /*
2685 * Main view backend
2686 */
2688 struct commit {
2689 char id[SIZEOF_REV]; /* SHA1 ID. */
2690 char title[75]; /* First line of the commit message. */
2691 char author[75]; /* Author of the commit. */
2692 struct tm time; /* Date from the author ident. */
2693 struct ref **refs; /* Repository references. */
2694 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2695 size_t graph_size; /* The width of the graph array. */
2696 };
2698 static bool
2699 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2700 {
2701 char buf[DATE_COLS + 1];
2702 struct commit *commit = line->data;
2703 enum line_type type;
2704 int col = 0;
2705 size_t timelen;
2706 size_t authorlen;
2707 int trimmed = 1;
2709 if (!*commit->author)
2710 return FALSE;
2712 wmove(view->win, lineno, col);
2714 if (selected) {
2715 type = LINE_CURSOR;
2716 wattrset(view->win, get_line_attr(type));
2717 wchgat(view->win, -1, 0, type, NULL);
2719 } else {
2720 type = LINE_MAIN_COMMIT;
2721 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2722 }
2724 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2725 waddnstr(view->win, buf, timelen);
2726 waddstr(view->win, " ");
2728 col += DATE_COLS;
2729 wmove(view->win, lineno, col);
2730 if (type != LINE_CURSOR)
2731 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2733 if (opt_utf8) {
2734 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2735 } else {
2736 authorlen = strlen(commit->author);
2737 if (authorlen > AUTHOR_COLS - 2) {
2738 authorlen = AUTHOR_COLS - 2;
2739 trimmed = 1;
2740 }
2741 }
2743 if (trimmed) {
2744 waddnstr(view->win, commit->author, authorlen);
2745 if (type != LINE_CURSOR)
2746 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2747 waddch(view->win, '~');
2748 } else {
2749 waddstr(view->win, commit->author);
2750 }
2752 col += AUTHOR_COLS;
2753 if (type != LINE_CURSOR)
2754 wattrset(view->win, A_NORMAL);
2756 if (opt_rev_graph && commit->graph_size) {
2757 size_t i;
2759 wmove(view->win, lineno, col);
2760 /* Using waddch() instead of waddnstr() ensures that
2761 * they'll be rendered correctly for the cursor line. */
2762 for (i = 0; i < commit->graph_size; i++)
2763 waddch(view->win, commit->graph[i]);
2765 col += commit->graph_size + 1;
2766 }
2768 wmove(view->win, lineno, col);
2770 if (commit->refs) {
2771 size_t i = 0;
2773 do {
2774 if (type == LINE_CURSOR)
2775 ;
2776 else if (commit->refs[i]->tag)
2777 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2778 else
2779 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2780 waddstr(view->win, "[");
2781 waddstr(view->win, commit->refs[i]->name);
2782 waddstr(view->win, "]");
2783 if (type != LINE_CURSOR)
2784 wattrset(view->win, A_NORMAL);
2785 waddstr(view->win, " ");
2786 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2787 } while (commit->refs[i++]->next);
2788 }
2790 if (type != LINE_CURSOR)
2791 wattrset(view->win, get_line_attr(type));
2793 {
2794 int titlelen = strlen(commit->title);
2796 if (col + titlelen > view->width)
2797 titlelen = view->width - col;
2799 waddnstr(view->win, commit->title, titlelen);
2800 }
2802 return TRUE;
2803 }
2805 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2806 static bool
2807 main_read(struct view *view, char *line)
2808 {
2809 enum line_type type = get_line_type(line);
2810 struct commit *commit = view->lines
2811 ? view->line[view->lines - 1].data : NULL;
2813 switch (type) {
2814 case LINE_COMMIT:
2815 commit = calloc(1, sizeof(struct commit));
2816 if (!commit)
2817 return FALSE;
2819 line += STRING_SIZE("commit ");
2821 view->line[view->lines++].data = commit;
2822 string_copy(commit->id, line);
2823 commit->refs = get_refs(commit->id);
2824 commit->graph[commit->graph_size++] = ACS_LTEE;
2825 break;
2827 case LINE_AUTHOR:
2828 {
2829 char *ident = line + STRING_SIZE("author ");
2830 char *end = strchr(ident, '<');
2832 if (!commit)
2833 break;
2835 if (end) {
2836 char *email = end + 1;
2838 for (; end > ident && isspace(end[-1]); end--) ;
2840 if (end == ident && *email) {
2841 ident = email;
2842 end = strchr(ident, '>');
2843 for (; end > ident && isspace(end[-1]); end--) ;
2844 }
2845 *end = 0;
2846 }
2848 /* End is NULL or ident meaning there's no author. */
2849 if (end <= ident)
2850 ident = "Unknown";
2852 string_copy(commit->author, ident);
2854 /* Parse epoch and timezone */
2855 if (end) {
2856 char *secs = strchr(end + 1, '>');
2857 char *zone;
2858 time_t time;
2860 if (!secs || secs[1] != ' ')
2861 break;
2863 secs += 2;
2864 time = (time_t) atol(secs);
2865 zone = strchr(secs, ' ');
2866 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2867 long tz;
2869 zone++;
2870 tz = ('0' - zone[1]) * 60 * 60 * 10;
2871 tz += ('0' - zone[2]) * 60 * 60;
2872 tz += ('0' - zone[3]) * 60;
2873 tz += ('0' - zone[4]) * 60;
2875 if (zone[0] == '-')
2876 tz = -tz;
2878 time -= tz;
2879 }
2880 gmtime_r(&time, &commit->time);
2881 }
2882 break;
2883 }
2884 default:
2885 if (!commit)
2886 break;
2888 /* Fill in the commit title if it has not already been set. */
2889 if (commit->title[0])
2890 break;
2892 /* Require titles to start with a non-space character at the
2893 * offset used by git log. */
2894 /* FIXME: More gracefull handling of titles; append "..." to
2895 * shortened titles, etc. */
2896 if (strncmp(line, " ", 4) ||
2897 isspace(line[4]))
2898 break;
2900 string_copy(commit->title, line + 4);
2901 }
2903 return TRUE;
2904 }
2906 static bool
2907 main_enter(struct view *view, struct line *line)
2908 {
2909 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2911 open_view(view, REQ_VIEW_DIFF, flags);
2912 return TRUE;
2913 }
2915 static bool
2916 main_grep(struct view *view, struct line *line)
2917 {
2918 struct commit *commit = line->data;
2919 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2920 char buf[DATE_COLS + 1];
2921 regmatch_t pmatch;
2923 for (state = S_TITLE; state < S_END; state++) {
2924 char *text;
2926 switch (state) {
2927 case S_TITLE: text = commit->title; break;
2928 case S_AUTHOR: text = commit->author; break;
2929 case S_DATE:
2930 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2931 continue;
2932 text = buf;
2933 break;
2935 default:
2936 return FALSE;
2937 }
2939 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
2940 return TRUE;
2941 }
2943 return FALSE;
2944 }
2946 static void
2947 main_select(struct view *view, struct line *line)
2948 {
2949 struct commit *commit = line->data;
2951 string_copy(view->ref, commit->id);
2952 string_copy(ref_commit, view->ref);
2953 }
2955 static struct view_ops main_ops = {
2956 "commit",
2957 main_draw,
2958 main_read,
2959 main_enter,
2960 main_grep,
2961 main_select,
2962 };
2965 /*
2966 * Unicode / UTF-8 handling
2967 *
2968 * NOTE: Much of the following code for dealing with unicode is derived from
2969 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2970 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2971 */
2973 /* I've (over)annotated a lot of code snippets because I am not entirely
2974 * confident that the approach taken by this small UTF-8 interface is correct.
2975 * --jonas */
2977 static inline int
2978 unicode_width(unsigned long c)
2979 {
2980 if (c >= 0x1100 &&
2981 (c <= 0x115f /* Hangul Jamo */
2982 || c == 0x2329
2983 || c == 0x232a
2984 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2985 /* CJK ... Yi */
2986 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2987 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2988 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2989 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2990 || (c >= 0xffe0 && c <= 0xffe6)
2991 || (c >= 0x20000 && c <= 0x2fffd)
2992 || (c >= 0x30000 && c <= 0x3fffd)))
2993 return 2;
2995 return 1;
2996 }
2998 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2999 * Illegal bytes are set one. */
3000 static const unsigned char utf8_bytes[256] = {
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 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,
3007 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,
3008 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,
3009 };
3011 /* Decode UTF-8 multi-byte representation into a unicode character. */
3012 static inline unsigned long
3013 utf8_to_unicode(const char *string, size_t length)
3014 {
3015 unsigned long unicode;
3017 switch (length) {
3018 case 1:
3019 unicode = string[0];
3020 break;
3021 case 2:
3022 unicode = (string[0] & 0x1f) << 6;
3023 unicode += (string[1] & 0x3f);
3024 break;
3025 case 3:
3026 unicode = (string[0] & 0x0f) << 12;
3027 unicode += ((string[1] & 0x3f) << 6);
3028 unicode += (string[2] & 0x3f);
3029 break;
3030 case 4:
3031 unicode = (string[0] & 0x0f) << 18;
3032 unicode += ((string[1] & 0x3f) << 12);
3033 unicode += ((string[2] & 0x3f) << 6);
3034 unicode += (string[3] & 0x3f);
3035 break;
3036 case 5:
3037 unicode = (string[0] & 0x0f) << 24;
3038 unicode += ((string[1] & 0x3f) << 18);
3039 unicode += ((string[2] & 0x3f) << 12);
3040 unicode += ((string[3] & 0x3f) << 6);
3041 unicode += (string[4] & 0x3f);
3042 break;
3043 case 6:
3044 unicode = (string[0] & 0x01) << 30;
3045 unicode += ((string[1] & 0x3f) << 24);
3046 unicode += ((string[2] & 0x3f) << 18);
3047 unicode += ((string[3] & 0x3f) << 12);
3048 unicode += ((string[4] & 0x3f) << 6);
3049 unicode += (string[5] & 0x3f);
3050 break;
3051 default:
3052 die("Invalid unicode length");
3053 }
3055 /* Invalid characters could return the special 0xfffd value but NUL
3056 * should be just as good. */
3057 return unicode > 0xffff ? 0 : unicode;
3058 }
3060 /* Calculates how much of string can be shown within the given maximum width
3061 * and sets trimmed parameter to non-zero value if all of string could not be
3062 * shown.
3063 *
3064 * Additionally, adds to coloffset how many many columns to move to align with
3065 * the expected position. Takes into account how multi-byte and double-width
3066 * characters will effect the cursor position.
3067 *
3068 * Returns the number of bytes to output from string to satisfy max_width. */
3069 static size_t
3070 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3071 {
3072 const char *start = string;
3073 const char *end = strchr(string, '\0');
3074 size_t mbwidth = 0;
3075 size_t width = 0;
3077 *trimmed = 0;
3079 while (string < end) {
3080 int c = *(unsigned char *) string;
3081 unsigned char bytes = utf8_bytes[c];
3082 size_t ucwidth;
3083 unsigned long unicode;
3085 if (string + bytes > end)
3086 break;
3088 /* Change representation to figure out whether
3089 * it is a single- or double-width character. */
3091 unicode = utf8_to_unicode(string, bytes);
3092 /* FIXME: Graceful handling of invalid unicode character. */
3093 if (!unicode)
3094 break;
3096 ucwidth = unicode_width(unicode);
3097 width += ucwidth;
3098 if (width > max_width) {
3099 *trimmed = 1;
3100 break;
3101 }
3103 /* The column offset collects the differences between the
3104 * number of bytes encoding a character and the number of
3105 * columns will be used for rendering said character.
3106 *
3107 * So if some character A is encoded in 2 bytes, but will be
3108 * represented on the screen using only 1 byte this will and up
3109 * adding 1 to the multi-byte column offset.
3110 *
3111 * Assumes that no double-width character can be encoding in
3112 * less than two bytes. */
3113 if (bytes > ucwidth)
3114 mbwidth += bytes - ucwidth;
3116 string += bytes;
3117 }
3119 *coloffset += mbwidth;
3121 return string - start;
3122 }
3125 /*
3126 * Status management
3127 */
3129 /* Whether or not the curses interface has been initialized. */
3130 static bool cursed = FALSE;
3132 /* The status window is used for polling keystrokes. */
3133 static WINDOW *status_win;
3135 /* Update status and title window. */
3136 static void
3137 report(const char *msg, ...)
3138 {
3139 static bool empty = TRUE;
3140 struct view *view = display[current_view];
3142 if (input_mode)
3143 return;
3145 if (!empty || *msg) {
3146 va_list args;
3148 va_start(args, msg);
3150 werase(status_win);
3151 wmove(status_win, 0, 0);
3152 if (*msg) {
3153 vwprintw(status_win, msg, args);
3154 empty = FALSE;
3155 } else {
3156 empty = TRUE;
3157 }
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 if (status == CANCEL) {
3272 /* Clear the status window */
3273 report("");
3274 return NULL;
3275 }
3277 buf[pos++] = 0;
3279 return buf;
3280 }
3282 /*
3283 * Repository references
3284 */
3286 static struct ref *refs;
3287 static size_t refs_size;
3289 /* Id <-> ref store */
3290 static struct ref ***id_refs;
3291 static size_t id_refs_size;
3293 static struct ref **
3294 get_refs(char *id)
3295 {
3296 struct ref ***tmp_id_refs;
3297 struct ref **ref_list = NULL;
3298 size_t ref_list_size = 0;
3299 size_t i;
3301 for (i = 0; i < id_refs_size; i++)
3302 if (!strcmp(id, id_refs[i][0]->id))
3303 return id_refs[i];
3305 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3306 if (!tmp_id_refs)
3307 return NULL;
3309 id_refs = tmp_id_refs;
3311 for (i = 0; i < refs_size; i++) {
3312 struct ref **tmp;
3314 if (strcmp(id, refs[i].id))
3315 continue;
3317 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3318 if (!tmp) {
3319 if (ref_list)
3320 free(ref_list);
3321 return NULL;
3322 }
3324 ref_list = tmp;
3325 if (ref_list_size > 0)
3326 ref_list[ref_list_size - 1]->next = 1;
3327 ref_list[ref_list_size] = &refs[i];
3329 /* XXX: The properties of the commit chains ensures that we can
3330 * safely modify the shared ref. The repo references will
3331 * always be similar for the same id. */
3332 ref_list[ref_list_size]->next = 0;
3333 ref_list_size++;
3334 }
3336 if (ref_list)
3337 id_refs[id_refs_size++] = ref_list;
3339 return ref_list;
3340 }
3342 static int
3343 read_ref(char *id, int idlen, char *name, int namelen)
3344 {
3345 struct ref *ref;
3346 bool tag = FALSE;
3348 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3349 /* Commits referenced by tags has "^{}" appended. */
3350 if (name[namelen - 1] != '}')
3351 return OK;
3353 while (namelen > 0 && name[namelen] != '^')
3354 namelen--;
3356 tag = TRUE;
3357 namelen -= STRING_SIZE("refs/tags/");
3358 name += STRING_SIZE("refs/tags/");
3360 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3361 namelen -= STRING_SIZE("refs/heads/");
3362 name += STRING_SIZE("refs/heads/");
3364 } else if (!strcmp(name, "HEAD")) {
3365 return OK;
3366 }
3368 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3369 if (!refs)
3370 return ERR;
3372 ref = &refs[refs_size++];
3373 ref->name = malloc(namelen + 1);
3374 if (!ref->name)
3375 return ERR;
3377 strncpy(ref->name, name, namelen);
3378 ref->name[namelen] = 0;
3379 ref->tag = tag;
3380 string_copy(ref->id, id);
3382 return OK;
3383 }
3385 static int
3386 load_refs(void)
3387 {
3388 const char *cmd_env = getenv("TIG_LS_REMOTE");
3389 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3391 return read_properties(popen(cmd, "r"), "\t", read_ref);
3392 }
3394 static int
3395 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3396 {
3397 if (!strcmp(name, "i18n.commitencoding"))
3398 string_copy(opt_encoding, value);
3400 return OK;
3401 }
3403 static int
3404 load_repo_config(void)
3405 {
3406 return read_properties(popen("git repo-config --list", "r"),
3407 "=", read_repo_config_option);
3408 }
3410 static int
3411 read_properties(FILE *pipe, const char *separators,
3412 int (*read_property)(char *, int, char *, int))
3413 {
3414 char buffer[BUFSIZ];
3415 char *name;
3416 int state = OK;
3418 if (!pipe)
3419 return ERR;
3421 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3422 char *value;
3423 size_t namelen;
3424 size_t valuelen;
3426 name = chomp_string(name);
3427 namelen = strcspn(name, separators);
3429 if (name[namelen]) {
3430 name[namelen] = 0;
3431 value = chomp_string(name + namelen + 1);
3432 valuelen = strlen(value);
3434 } else {
3435 value = "";
3436 valuelen = 0;
3437 }
3439 state = read_property(name, namelen, value, valuelen);
3440 }
3442 if (state != ERR && ferror(pipe))
3443 state = ERR;
3445 pclose(pipe);
3447 return state;
3448 }
3451 /*
3452 * Main
3453 */
3455 static void __NORETURN
3456 quit(int sig)
3457 {
3458 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3459 if (cursed)
3460 endwin();
3461 exit(0);
3462 }
3464 static void __NORETURN
3465 die(const char *err, ...)
3466 {
3467 va_list args;
3469 endwin();
3471 va_start(args, err);
3472 fputs("tig: ", stderr);
3473 vfprintf(stderr, err, args);
3474 fputs("\n", stderr);
3475 va_end(args);
3477 exit(1);
3478 }
3480 int
3481 main(int argc, char *argv[])
3482 {
3483 struct view *view;
3484 enum request request;
3485 size_t i;
3487 signal(SIGINT, quit);
3489 if (setlocale(LC_ALL, "")) {
3490 string_copy(opt_codeset, nl_langinfo(CODESET));
3491 }
3493 if (load_options() == ERR)
3494 die("Failed to load user config.");
3496 /* Load the repo config file so options can be overwritten from
3497 * the command line. */
3498 if (load_repo_config() == ERR)
3499 die("Failed to load repo config.");
3501 if (!parse_options(argc, argv))
3502 return 0;
3504 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3505 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3506 if (opt_iconv == ICONV_NONE)
3507 die("Failed to initialize character set conversion");
3508 }
3510 if (load_refs() == ERR)
3511 die("Failed to load refs.");
3513 /* Require a git repository unless when running in pager mode. */
3514 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3515 die("Not a git repository");
3517 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3518 view->cmd_env = getenv(view->cmd_env);
3520 request = opt_request;
3522 init_display();
3524 while (view_driver(display[current_view], request)) {
3525 int key;
3526 int i;
3528 foreach_view (view, i)
3529 update_view(view);
3531 /* Refresh, accept single keystroke of input */
3532 key = wgetch(status_win);
3534 request = get_keybinding(display[current_view]->keymap, key);
3536 /* Some low-level request handling. This keeps access to
3537 * status_win restricted. */
3538 switch (request) {
3539 case REQ_PROMPT:
3540 {
3541 char *cmd = read_prompt(":");
3543 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3544 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3545 opt_request = REQ_VIEW_DIFF;
3546 } else {
3547 opt_request = REQ_VIEW_PAGER;
3548 }
3549 break;
3550 }
3552 request = REQ_NONE;
3553 break;
3554 }
3555 case REQ_SEARCH:
3556 case REQ_SEARCH_BACK:
3557 {
3558 const char *prompt = request == REQ_SEARCH
3559 ? "/" : "?";
3560 char *search = read_prompt(prompt);
3562 if (search)
3563 string_copy(opt_search, search);
3564 else
3565 request = REQ_NONE;
3566 break;
3567 }
3568 case REQ_SCREEN_RESIZE:
3569 {
3570 int height, width;
3572 getmaxyx(stdscr, height, width);
3574 /* Resize the status view and let the view driver take
3575 * care of resizing the displayed views. */
3576 wresize(status_win, 1, width);
3577 mvwin(status_win, height - 1, 0);
3578 wrefresh(status_win);
3579 break;
3580 }
3581 default:
3582 break;
3583 }
3584 }
3586 quit(0);
3588 return 0;
3589 }