![[tokkee]](http://tokkee.org/images/avatar.png){kind=avatar}
f3dc7b78785338aef17c2a8ba05a117f812332d4
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 */
64 /* Revision graph */
66 #define REVGRAPH_INIT 'I'
67 #define REVGRAPH_MERGE 'M'
68 #define REVGRAPH_BRANCH '+'
69 #define REVGRAPH_COMMIT '*'
70 #define REVGRAPH_LINE '|'
72 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
74 /* This color name can be used to refer to the default term colors. */
75 #define COLOR_DEFAULT (-1)
77 #define ICONV_NONE ((iconv_t) -1)
79 /* The format and size of the date column in the main view. */
80 #define DATE_FORMAT "%Y-%m-%d %H:%M"
81 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
83 #define AUTHOR_COLS 20
85 /* The default interval between line numbers. */
86 #define NUMBER_INTERVAL 1
88 #define TABSIZE 8
90 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
92 #define TIG_LS_REMOTE \
93 "git ls-remote . 2>/dev/null"
95 #define TIG_DIFF_CMD \
96 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
98 #define TIG_LOG_CMD \
99 "git log --cc --stat -n100 %s 2>/dev/null"
101 #define TIG_MAIN_CMD \
102 "git log --topo-order --pretty=raw %s 2>/dev/null"
104 #define TIG_TREE_CMD \
105 "git ls-tree %s %s"
107 #define TIG_BLOB_CMD \
108 "git cat-file blob %s"
110 /* XXX: Needs to be defined to the empty string. */
111 #define TIG_HELP_CMD ""
112 #define TIG_PAGER_CMD ""
114 /* Some ascii-shorthands fitted into the ncurses namespace. */
115 #define KEY_TAB '\t'
116 #define KEY_RETURN '\r'
117 #define KEY_ESC 27
120 struct ref {
121 char *name; /* Ref name; tag or head names are shortened. */
122 char id[SIZEOF_REV]; /* Commit SHA1 ID */
123 unsigned int tag:1; /* Is it a tag? */
124 unsigned int next:1; /* For ref lists: are there more refs? */
125 };
127 static struct ref **get_refs(char *id);
129 struct int_map {
130 const char *name;
131 int namelen;
132 int value;
133 };
135 static int
136 set_from_int_map(struct int_map *map, size_t map_size,
137 int *value, const char *name, int namelen)
138 {
140 int i;
142 for (i = 0; i < map_size; i++)
143 if (namelen == map[i].namelen &&
144 !strncasecmp(name, map[i].name, namelen)) {
145 *value = map[i].value;
146 return OK;
147 }
149 return ERR;
150 }
153 /*
154 * String helpers
155 */
157 static inline void
158 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
159 {
160 if (srclen > dstlen - 1)
161 srclen = dstlen - 1;
163 strncpy(dst, src, srclen);
164 dst[srclen] = 0;
165 }
167 /* Shorthands for safely copying into a fixed buffer. */
169 #define string_copy(dst, src) \
170 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
172 #define string_ncopy(dst, src, srclen) \
173 string_ncopy_do(dst, sizeof(dst), src, srclen)
175 static char *
176 chomp_string(char *name)
177 {
178 int namelen;
180 while (isspace(*name))
181 name++;
183 namelen = strlen(name) - 1;
184 while (namelen > 0 && isspace(name[namelen]))
185 name[namelen--] = 0;
187 return name;
188 }
190 static bool
191 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
192 {
193 va_list args;
194 size_t pos = bufpos ? *bufpos : 0;
196 va_start(args, fmt);
197 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
198 va_end(args);
200 if (bufpos)
201 *bufpos = pos;
203 return pos >= bufsize ? FALSE : TRUE;
204 }
206 #define string_format(buf, fmt, args...) \
207 string_nformat(buf, sizeof(buf), NULL, fmt, args)
209 #define string_format_from(buf, from, fmt, args...) \
210 string_nformat(buf, sizeof(buf), from, fmt, args)
212 static int
213 string_enum_compare(const char *str1, const char *str2, int len)
214 {
215 size_t i;
217 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
219 /* Diff-Header == DIFF_HEADER */
220 for (i = 0; i < len; i++) {
221 if (toupper(str1[i]) == toupper(str2[i]))
222 continue;
224 if (string_enum_sep(str1[i]) &&
225 string_enum_sep(str2[i]))
226 continue;
228 return str1[i] - str2[i];
229 }
231 return 0;
232 }
234 /* Shell quoting
235 *
236 * NOTE: The following is a slightly modified copy of the git project's shell
237 * quoting routines found in the quote.c file.
238 *
239 * Help to copy the thing properly quoted for the shell safety. any single
240 * quote is replaced with '\'', any exclamation point is replaced with '\!',
241 * and the whole thing is enclosed in a
242 *
243 * E.g.
244 * original sq_quote result
245 * name ==> name ==> 'name'
246 * a b ==> a b ==> 'a b'
247 * a'b ==> a'\''b ==> 'a'\''b'
248 * a!b ==> a'\!'b ==> 'a'\!'b'
249 */
251 static size_t
252 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
253 {
254 char c;
256 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
258 BUFPUT('\'');
259 while ((c = *src++)) {
260 if (c == '\'' || c == '!') {
261 BUFPUT('\'');
262 BUFPUT('\\');
263 BUFPUT(c);
264 BUFPUT('\'');
265 } else {
266 BUFPUT(c);
267 }
268 }
269 BUFPUT('\'');
271 return bufsize;
272 }
275 /*
276 * User requests
277 */
279 #define REQ_INFO \
280 /* XXX: Keep the view request first and in sync with views[]. */ \
281 REQ_GROUP("View switching") \
282 REQ_(VIEW_MAIN, "Show main view"), \
283 REQ_(VIEW_DIFF, "Show diff view"), \
284 REQ_(VIEW_LOG, "Show log view"), \
285 REQ_(VIEW_TREE, "Show tree view"), \
286 REQ_(VIEW_BLOB, "Show blob view"), \
287 REQ_(VIEW_HELP, "Show help page"), \
288 REQ_(VIEW_PAGER, "Show pager view"), \
289 \
290 REQ_GROUP("View manipulation") \
291 REQ_(ENTER, "Enter current line and scroll"), \
292 REQ_(NEXT, "Move to next"), \
293 REQ_(PREVIOUS, "Move to previous"), \
294 REQ_(VIEW_NEXT, "Move focus to next view"), \
295 REQ_(VIEW_CLOSE, "Close the current view"), \
296 REQ_(QUIT, "Close all views and quit"), \
297 \
298 REQ_GROUP("Cursor navigation") \
299 REQ_(MOVE_UP, "Move cursor one line up"), \
300 REQ_(MOVE_DOWN, "Move cursor one line down"), \
301 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
302 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
303 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
304 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
305 \
306 REQ_GROUP("Scrolling") \
307 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
308 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
309 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
310 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
311 \
312 REQ_GROUP("Searching") \
313 REQ_(SEARCH, "Search the view"), \
314 REQ_(SEARCH_BACK, "Search backwards in the view"), \
315 REQ_(FIND_NEXT, "Find next search match"), \
316 REQ_(FIND_PREV, "Find previous search match"), \
317 \
318 REQ_GROUP("Misc") \
319 REQ_(NONE, "Do nothing"), \
320 REQ_(PROMPT, "Bring up the prompt"), \
321 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
322 REQ_(SCREEN_RESIZE, "Resize the screen"), \
323 REQ_(SHOW_VERSION, "Show version information"), \
324 REQ_(STOP_LOADING, "Stop all loading views"), \
325 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
326 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
329 /* User action requests. */
330 enum request {
331 #define REQ_GROUP(help)
332 #define REQ_(req, help) REQ_##req
334 /* Offset all requests to avoid conflicts with ncurses getch values. */
335 REQ_OFFSET = KEY_MAX + 1,
336 REQ_INFO,
337 REQ_UNKNOWN,
339 #undef REQ_GROUP
340 #undef REQ_
341 };
343 struct request_info {
344 enum request request;
345 char *name;
346 int namelen;
347 char *help;
348 };
350 static struct request_info req_info[] = {
351 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
352 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
353 REQ_INFO
354 #undef REQ_GROUP
355 #undef REQ_
356 };
358 static enum request
359 get_request(const char *name)
360 {
361 int namelen = strlen(name);
362 int i;
364 for (i = 0; i < ARRAY_SIZE(req_info); i++)
365 if (req_info[i].namelen == namelen &&
366 !string_enum_compare(req_info[i].name, name, namelen))
367 return req_info[i].request;
369 return REQ_UNKNOWN;
370 }
373 /*
374 * Options
375 */
377 static const char usage[] =
378 VERSION " (" __DATE__ ")\n"
379 "\n"
380 "Usage: tig [options]\n"
381 " or: tig [options] [--] [git log options]\n"
382 " or: tig [options] log [git log options]\n"
383 " or: tig [options] diff [git diff options]\n"
384 " or: tig [options] show [git show options]\n"
385 " or: tig [options] < [git command output]\n"
386 "\n"
387 "Options:\n"
388 " -l Start up in log view\n"
389 " -d Start up in diff view\n"
390 " -n[I], --line-number[=I] Show line numbers with given interval\n"
391 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
392 " -- Mark end of tig options\n"
393 " -v, --version Show version and exit\n"
394 " -h, --help Show help message and exit\n";
396 /* Option and state variables. */
397 static bool opt_line_number = FALSE;
398 static bool opt_rev_graph = TRUE;
399 static int opt_num_interval = NUMBER_INTERVAL;
400 static int opt_tab_size = TABSIZE;
401 static enum request opt_request = REQ_VIEW_MAIN;
402 static char opt_cmd[SIZEOF_STR] = "";
403 static char opt_path[SIZEOF_STR] = "";
404 static FILE *opt_pipe = NULL;
405 static char opt_encoding[20] = "UTF-8";
406 static bool opt_utf8 = TRUE;
407 static char opt_codeset[20] = "UTF-8";
408 static iconv_t opt_iconv = ICONV_NONE;
409 static char opt_search[SIZEOF_STR] = "";
411 enum option_type {
412 OPT_NONE,
413 OPT_INT,
414 };
416 static bool
417 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
418 {
419 va_list args;
420 char *value = "";
421 int *number;
423 if (opt[0] != '-')
424 return FALSE;
426 if (opt[1] == '-') {
427 int namelen = strlen(name);
429 opt += 2;
431 if (strncmp(opt, name, namelen))
432 return FALSE;
434 if (opt[namelen] == '=')
435 value = opt + namelen + 1;
437 } else {
438 if (!short_name || opt[1] != short_name)
439 return FALSE;
440 value = opt + 2;
441 }
443 va_start(args, type);
444 if (type == OPT_INT) {
445 number = va_arg(args, int *);
446 if (isdigit(*value))
447 *number = atoi(value);
448 }
449 va_end(args);
451 return TRUE;
452 }
454 /* Returns the index of log or diff command or -1 to exit. */
455 static bool
456 parse_options(int argc, char *argv[])
457 {
458 int i;
460 for (i = 1; i < argc; i++) {
461 char *opt = argv[i];
463 if (!strcmp(opt, "-l")) {
464 opt_request = REQ_VIEW_LOG;
465 continue;
466 }
468 if (!strcmp(opt, "-d")) {
469 opt_request = REQ_VIEW_DIFF;
470 continue;
471 }
473 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
474 opt_line_number = TRUE;
475 continue;
476 }
478 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
479 opt_tab_size = MIN(opt_tab_size, TABSIZE);
480 continue;
481 }
483 if (check_option(opt, 'v', "version", OPT_NONE)) {
484 printf("tig version %s\n", VERSION);
485 return FALSE;
486 }
488 if (check_option(opt, 'h', "help", OPT_NONE)) {
489 printf(usage);
490 return FALSE;
491 }
493 if (!strcmp(opt, "--")) {
494 i++;
495 break;
496 }
498 if (!strcmp(opt, "log") ||
499 !strcmp(opt, "diff") ||
500 !strcmp(opt, "show")) {
501 opt_request = opt[0] == 'l'
502 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
503 break;
504 }
506 if (opt[0] && opt[0] != '-')
507 break;
509 die("unknown option '%s'\n\n%s", opt, usage);
510 }
512 if (!isatty(STDIN_FILENO)) {
513 opt_request = REQ_VIEW_PAGER;
514 opt_pipe = stdin;
516 } else if (i < argc) {
517 size_t buf_size;
519 if (opt_request == REQ_VIEW_MAIN)
520 /* XXX: This is vulnerable to the user overriding
521 * options required for the main view parser. */
522 string_copy(opt_cmd, "git log --stat --pretty=raw");
523 else
524 string_copy(opt_cmd, "git");
525 buf_size = strlen(opt_cmd);
527 while (buf_size < sizeof(opt_cmd) && i < argc) {
528 opt_cmd[buf_size++] = ' ';
529 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
530 }
532 if (buf_size >= sizeof(opt_cmd))
533 die("command too long");
535 opt_cmd[buf_size] = 0;
537 }
539 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
540 opt_utf8 = FALSE;
542 return TRUE;
543 }
546 /*
547 * Line-oriented content detection.
548 */
550 #define LINE_INFO \
551 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
552 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
553 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
554 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
555 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
556 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
557 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
558 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
559 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
560 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
561 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
562 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
563 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
564 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
565 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
566 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
567 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
568 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
569 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
570 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
571 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
572 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
573 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
574 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
575 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
576 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
577 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
578 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
579 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
580 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
581 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
582 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
583 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
584 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
585 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
586 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
587 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
588 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
589 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
590 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
591 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
593 enum line_type {
594 #define LINE(type, line, fg, bg, attr) \
595 LINE_##type
596 LINE_INFO
597 #undef LINE
598 };
600 struct line_info {
601 const char *name; /* Option name. */
602 int namelen; /* Size of option name. */
603 const char *line; /* The start of line to match. */
604 int linelen; /* Size of string to match. */
605 int fg, bg, attr; /* Color and text attributes for the lines. */
606 };
608 static struct line_info line_info[] = {
609 #define LINE(type, line, fg, bg, attr) \
610 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
611 LINE_INFO
612 #undef LINE
613 };
615 static enum line_type
616 get_line_type(char *line)
617 {
618 int linelen = strlen(line);
619 enum line_type type;
621 for (type = 0; type < ARRAY_SIZE(line_info); type++)
622 /* Case insensitive search matches Signed-off-by lines better. */
623 if (linelen >= line_info[type].linelen &&
624 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
625 return type;
627 return LINE_DEFAULT;
628 }
630 static inline int
631 get_line_attr(enum line_type type)
632 {
633 assert(type < ARRAY_SIZE(line_info));
634 return COLOR_PAIR(type) | line_info[type].attr;
635 }
637 static struct line_info *
638 get_line_info(char *name, int namelen)
639 {
640 enum line_type type;
642 for (type = 0; type < ARRAY_SIZE(line_info); type++)
643 if (namelen == line_info[type].namelen &&
644 !string_enum_compare(line_info[type].name, name, namelen))
645 return &line_info[type];
647 return NULL;
648 }
650 static void
651 init_colors(void)
652 {
653 int default_bg = COLOR_BLACK;
654 int default_fg = COLOR_WHITE;
655 enum line_type type;
657 start_color();
659 if (use_default_colors() != ERR) {
660 default_bg = -1;
661 default_fg = -1;
662 }
664 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
665 struct line_info *info = &line_info[type];
666 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
667 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
669 init_pair(type, fg, bg);
670 }
671 }
673 struct line {
674 enum line_type type;
676 /* State flags */
677 unsigned int selected:1;
679 void *data; /* User data */
680 };
683 /*
684 * Keys
685 */
687 struct keybinding {
688 int alias;
689 enum request request;
690 struct keybinding *next;
691 };
693 static struct keybinding default_keybindings[] = {
694 /* View switching */
695 { 'm', REQ_VIEW_MAIN },
696 { 'd', REQ_VIEW_DIFF },
697 { 'l', REQ_VIEW_LOG },
698 { 't', REQ_VIEW_TREE },
699 { 'f', REQ_VIEW_BLOB },
700 { 'p', REQ_VIEW_PAGER },
701 { 'h', REQ_VIEW_HELP },
703 /* View manipulation */
704 { 'q', REQ_VIEW_CLOSE },
705 { KEY_TAB, REQ_VIEW_NEXT },
706 { KEY_RETURN, REQ_ENTER },
707 { KEY_UP, REQ_PREVIOUS },
708 { KEY_DOWN, REQ_NEXT },
710 /* Cursor navigation */
711 { 'k', REQ_MOVE_UP },
712 { 'j', REQ_MOVE_DOWN },
713 { KEY_HOME, REQ_MOVE_FIRST_LINE },
714 { KEY_END, REQ_MOVE_LAST_LINE },
715 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
716 { ' ', REQ_MOVE_PAGE_DOWN },
717 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
718 { 'b', REQ_MOVE_PAGE_UP },
719 { '-', REQ_MOVE_PAGE_UP },
721 /* Scrolling */
722 { KEY_IC, REQ_SCROLL_LINE_UP },
723 { KEY_DC, REQ_SCROLL_LINE_DOWN },
724 { 'w', REQ_SCROLL_PAGE_UP },
725 { 's', REQ_SCROLL_PAGE_DOWN },
727 /* Searching */
728 { '/', REQ_SEARCH },
729 { '?', REQ_SEARCH_BACK },
730 { 'n', REQ_FIND_NEXT },
731 { 'N', REQ_FIND_PREV },
733 /* Misc */
734 { 'Q', REQ_QUIT },
735 { 'z', REQ_STOP_LOADING },
736 { 'v', REQ_SHOW_VERSION },
737 { 'r', REQ_SCREEN_REDRAW },
738 { '.', REQ_TOGGLE_LINENO },
739 { 'g', REQ_TOGGLE_REV_GRAPH },
740 { ':', REQ_PROMPT },
742 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
743 { ERR, REQ_NONE },
745 /* Using the ncurses SIGWINCH handler. */
746 { KEY_RESIZE, REQ_SCREEN_RESIZE },
747 };
749 #define KEYMAP_INFO \
750 KEYMAP_(GENERIC), \
751 KEYMAP_(MAIN), \
752 KEYMAP_(DIFF), \
753 KEYMAP_(LOG), \
754 KEYMAP_(TREE), \
755 KEYMAP_(BLOB), \
756 KEYMAP_(PAGER), \
757 KEYMAP_(HELP) \
759 enum keymap {
760 #define KEYMAP_(name) KEYMAP_##name
761 KEYMAP_INFO
762 #undef KEYMAP_
763 };
765 static struct int_map keymap_table[] = {
766 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
767 KEYMAP_INFO
768 #undef KEYMAP_
769 };
771 #define set_keymap(map, name) \
772 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
774 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
776 static void
777 add_keybinding(enum keymap keymap, enum request request, int key)
778 {
779 struct keybinding *keybinding;
781 keybinding = calloc(1, sizeof(*keybinding));
782 if (!keybinding)
783 die("Failed to allocate keybinding");
785 keybinding->alias = key;
786 keybinding->request = request;
787 keybinding->next = keybindings[keymap];
788 keybindings[keymap] = keybinding;
789 }
791 /* Looks for a key binding first in the given map, then in the generic map, and
792 * lastly in the default keybindings. */
793 static enum request
794 get_keybinding(enum keymap keymap, int key)
795 {
796 struct keybinding *kbd;
797 int i;
799 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
800 if (kbd->alias == key)
801 return kbd->request;
803 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
804 if (kbd->alias == key)
805 return kbd->request;
807 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
808 if (default_keybindings[i].alias == key)
809 return default_keybindings[i].request;
811 return (enum request) key;
812 }
815 struct key {
816 char *name;
817 int value;
818 };
820 static struct key key_table[] = {
821 { "Enter", KEY_RETURN },
822 { "Space", ' ' },
823 { "Backspace", KEY_BACKSPACE },
824 { "Tab", KEY_TAB },
825 { "Escape", KEY_ESC },
826 { "Left", KEY_LEFT },
827 { "Right", KEY_RIGHT },
828 { "Up", KEY_UP },
829 { "Down", KEY_DOWN },
830 { "Insert", KEY_IC },
831 { "Delete", KEY_DC },
832 { "Hash", '#' },
833 { "Home", KEY_HOME },
834 { "End", KEY_END },
835 { "PageUp", KEY_PPAGE },
836 { "PageDown", KEY_NPAGE },
837 { "F1", KEY_F(1) },
838 { "F2", KEY_F(2) },
839 { "F3", KEY_F(3) },
840 { "F4", KEY_F(4) },
841 { "F5", KEY_F(5) },
842 { "F6", KEY_F(6) },
843 { "F7", KEY_F(7) },
844 { "F8", KEY_F(8) },
845 { "F9", KEY_F(9) },
846 { "F10", KEY_F(10) },
847 { "F11", KEY_F(11) },
848 { "F12", KEY_F(12) },
849 };
851 static int
852 get_key_value(const char *name)
853 {
854 int i;
856 for (i = 0; i < ARRAY_SIZE(key_table); i++)
857 if (!strcasecmp(key_table[i].name, name))
858 return key_table[i].value;
860 if (strlen(name) == 1 && isprint(*name))
861 return (int) *name;
863 return ERR;
864 }
866 static char *
867 get_key(enum request request)
868 {
869 static char buf[BUFSIZ];
870 static char key_char[] = "'X'";
871 size_t pos = 0;
872 char *sep = " ";
873 int i;
875 buf[pos] = 0;
877 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
878 struct keybinding *keybinding = &default_keybindings[i];
879 char *seq = NULL;
880 int key;
882 if (keybinding->request != request)
883 continue;
885 for (key = 0; key < ARRAY_SIZE(key_table); key++)
886 if (key_table[key].value == keybinding->alias)
887 seq = key_table[key].name;
889 if (seq == NULL &&
890 keybinding->alias < 127 &&
891 isprint(keybinding->alias)) {
892 key_char[1] = (char) keybinding->alias;
893 seq = key_char;
894 }
896 if (!seq)
897 seq = "'?'";
899 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
900 return "Too many keybindings!";
901 sep = ", ";
902 }
904 return buf;
905 }
908 /*
909 * User config file handling.
910 */
912 static struct int_map color_map[] = {
913 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
914 COLOR_MAP(DEFAULT),
915 COLOR_MAP(BLACK),
916 COLOR_MAP(BLUE),
917 COLOR_MAP(CYAN),
918 COLOR_MAP(GREEN),
919 COLOR_MAP(MAGENTA),
920 COLOR_MAP(RED),
921 COLOR_MAP(WHITE),
922 COLOR_MAP(YELLOW),
923 };
925 #define set_color(color, name) \
926 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
928 static struct int_map attr_map[] = {
929 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
930 ATTR_MAP(NORMAL),
931 ATTR_MAP(BLINK),
932 ATTR_MAP(BOLD),
933 ATTR_MAP(DIM),
934 ATTR_MAP(REVERSE),
935 ATTR_MAP(STANDOUT),
936 ATTR_MAP(UNDERLINE),
937 };
939 #define set_attribute(attr, name) \
940 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
942 static int config_lineno;
943 static bool config_errors;
944 static char *config_msg;
946 /* Wants: object fgcolor bgcolor [attr] */
947 static int
948 option_color_command(int argc, char *argv[])
949 {
950 struct line_info *info;
952 if (argc != 3 && argc != 4) {
953 config_msg = "Wrong number of arguments given to color command";
954 return ERR;
955 }
957 info = get_line_info(argv[0], strlen(argv[0]));
958 if (!info) {
959 config_msg = "Unknown color name";
960 return ERR;
961 }
963 if (set_color(&info->fg, argv[1]) == ERR ||
964 set_color(&info->bg, argv[2]) == ERR) {
965 config_msg = "Unknown color";
966 return ERR;
967 }
969 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
970 config_msg = "Unknown attribute";
971 return ERR;
972 }
974 return OK;
975 }
977 /* Wants: name = value */
978 static int
979 option_set_command(int argc, char *argv[])
980 {
981 if (argc != 3) {
982 config_msg = "Wrong number of arguments given to set command";
983 return ERR;
984 }
986 if (strcmp(argv[1], "=")) {
987 config_msg = "No value assigned";
988 return ERR;
989 }
991 if (!strcmp(argv[0], "show-rev-graph")) {
992 opt_rev_graph = (!strcmp(argv[2], "1") ||
993 !strcmp(argv[2], "true") ||
994 !strcmp(argv[2], "yes"));
995 return OK;
996 }
998 if (!strcmp(argv[0], "line-number-interval")) {
999 opt_num_interval = atoi(argv[2]);
1000 return OK;
1001 }
1003 if (!strcmp(argv[0], "tab-size")) {
1004 opt_tab_size = atoi(argv[2]);
1005 return OK;
1006 }
1008 if (!strcmp(argv[0], "commit-encoding")) {
1009 char *arg = argv[2];
1010 int delimiter = *arg;
1011 int i;
1013 switch (delimiter) {
1014 case '"':
1015 case '\'':
1016 for (arg++, i = 0; arg[i]; i++)
1017 if (arg[i] == delimiter) {
1018 arg[i] = 0;
1019 break;
1020 }
1021 default:
1022 string_copy(opt_encoding, arg);
1023 return OK;
1024 }
1025 }
1027 config_msg = "Unknown variable name";
1028 return ERR;
1029 }
1031 /* Wants: mode request key */
1032 static int
1033 option_bind_command(int argc, char *argv[])
1034 {
1035 enum request request;
1036 int keymap;
1037 int key;
1039 if (argc != 3) {
1040 config_msg = "Wrong number of arguments given to bind command";
1041 return ERR;
1042 }
1044 if (set_keymap(&keymap, argv[0]) == ERR) {
1045 config_msg = "Unknown key map";
1046 return ERR;
1047 }
1049 key = get_key_value(argv[1]);
1050 if (key == ERR) {
1051 config_msg = "Unknown key";
1052 return ERR;
1053 }
1055 request = get_request(argv[2]);
1056 if (request == REQ_UNKNOWN) {
1057 config_msg = "Unknown request name";
1058 return ERR;
1059 }
1061 add_keybinding(keymap, request, key);
1063 return OK;
1064 }
1066 static int
1067 set_option(char *opt, char *value)
1068 {
1069 char *argv[16];
1070 int valuelen;
1071 int argc = 0;
1073 /* Tokenize */
1074 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1075 argv[argc++] = value;
1077 value += valuelen;
1078 if (!*value)
1079 break;
1081 *value++ = 0;
1082 while (isspace(*value))
1083 value++;
1084 }
1086 if (!strcmp(opt, "color"))
1087 return option_color_command(argc, argv);
1089 if (!strcmp(opt, "set"))
1090 return option_set_command(argc, argv);
1092 if (!strcmp(opt, "bind"))
1093 return option_bind_command(argc, argv);
1095 config_msg = "Unknown option command";
1096 return ERR;
1097 }
1099 static int
1100 read_option(char *opt, int optlen, char *value, int valuelen)
1101 {
1102 int status = OK;
1104 config_lineno++;
1105 config_msg = "Internal error";
1107 /* Check for comment markers, since read_properties() will
1108 * only ensure opt and value are split at first " \t". */
1109 optlen = strcspn(opt, "#");
1110 if (optlen == 0)
1111 return OK;
1113 if (opt[optlen] != 0) {
1114 config_msg = "No option value";
1115 status = ERR;
1117 } else {
1118 /* Look for comment endings in the value. */
1119 int len = strcspn(value, "#");
1121 if (len < valuelen) {
1122 valuelen = len;
1123 value[valuelen] = 0;
1124 }
1126 status = set_option(opt, value);
1127 }
1129 if (status == ERR) {
1130 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1131 config_lineno, optlen, opt, config_msg);
1132 config_errors = TRUE;
1133 }
1135 /* Always keep going if errors are encountered. */
1136 return OK;
1137 }
1139 static int
1140 load_options(void)
1141 {
1142 char *home = getenv("HOME");
1143 char buf[SIZEOF_STR];
1144 FILE *file;
1146 config_lineno = 0;
1147 config_errors = FALSE;
1149 if (!home || !string_format(buf, "%s/.tigrc", home))
1150 return ERR;
1152 /* It's ok that the file doesn't exist. */
1153 file = fopen(buf, "r");
1154 if (!file)
1155 return OK;
1157 if (read_properties(file, " \t", read_option) == ERR ||
1158 config_errors == TRUE)
1159 fprintf(stderr, "Errors while loading %s.\n", buf);
1161 return OK;
1162 }
1165 /*
1166 * The viewer
1167 */
1169 struct view;
1170 struct view_ops;
1172 /* The display array of active views and the index of the current view. */
1173 static struct view *display[2];
1174 static unsigned int current_view;
1176 #define foreach_displayed_view(view, i) \
1177 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1179 #define displayed_views() (display[1] != NULL ? 2 : 1)
1181 /* Current head and commit ID */
1182 static char ref_blob[SIZEOF_REF] = "";
1183 static char ref_commit[SIZEOF_REF] = "HEAD";
1184 static char ref_head[SIZEOF_REF] = "HEAD";
1186 struct view {
1187 const char *name; /* View name */
1188 const char *cmd_fmt; /* Default command line format */
1189 const char *cmd_env; /* Command line set via environment */
1190 const char *id; /* Points to either of ref_{head,commit,blob} */
1192 struct view_ops *ops; /* View operations */
1194 enum keymap keymap; /* What keymap does this view have */
1196 char cmd[SIZEOF_STR]; /* Command buffer */
1197 char ref[SIZEOF_REF]; /* Hovered commit reference */
1198 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1200 int height, width; /* The width and height of the main window */
1201 WINDOW *win; /* The main window */
1202 WINDOW *title; /* The title window living below the main window */
1204 /* Navigation */
1205 unsigned long offset; /* Offset of the window top */
1206 unsigned long lineno; /* Current line number */
1208 /* Searching */
1209 char grep[SIZEOF_STR]; /* Search string */
1210 regex_t *regex; /* Pre-compiled regex */
1212 /* If non-NULL, points to the view that opened this view. If this view
1213 * is closed tig will switch back to the parent view. */
1214 struct view *parent;
1216 /* Buffering */
1217 unsigned long lines; /* Total number of lines */
1218 struct line *line; /* Line index */
1219 unsigned long line_size;/* Total number of allocated lines */
1220 unsigned int digits; /* Number of digits in the lines member. */
1222 /* Loading */
1223 FILE *pipe;
1224 time_t start_time;
1225 };
1227 struct view_ops {
1228 /* What type of content being displayed. Used in the title bar. */
1229 const char *type;
1230 /* Draw one line; @lineno must be < view->height. */
1231 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1232 /* Read one line; updates view->line. */
1233 bool (*read)(struct view *view, char *data);
1234 /* Depending on view, change display based on current line. */
1235 bool (*enter)(struct view *view, struct line *line);
1236 /* Search for regex in a line. */
1237 bool (*grep)(struct view *view, struct line *line);
1238 /* Select line */
1239 void (*select)(struct view *view, struct line *line);
1240 };
1242 static struct view_ops pager_ops;
1243 static struct view_ops main_ops;
1244 static struct view_ops tree_ops;
1245 static struct view_ops blob_ops;
1247 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1248 { name, cmd, #env, ref, ops, map}
1250 #define VIEW_(id, name, ops, ref) \
1251 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1254 static struct view views[] = {
1255 VIEW_(MAIN, "main", &main_ops, ref_head),
1256 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1257 VIEW_(LOG, "log", &pager_ops, ref_head),
1258 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1259 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1260 VIEW_(HELP, "help", &pager_ops, "static"),
1261 VIEW_(PAGER, "pager", &pager_ops, "static"),
1262 };
1264 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1266 #define foreach_view(view, i) \
1267 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1269 #define view_is_displayed(view) \
1270 (view == display[0] || view == display[1])
1272 static bool
1273 draw_view_line(struct view *view, unsigned int lineno)
1274 {
1275 struct line *line;
1276 bool selected = (view->offset + lineno == view->lineno);
1278 assert(view_is_displayed(view));
1280 if (view->offset + lineno >= view->lines)
1281 return FALSE;
1283 line = &view->line[view->offset + lineno];
1285 if (selected) {
1286 line->selected = TRUE;
1287 view->ops->select(view, line);
1288 } else if (line->selected) {
1289 line->selected = FALSE;
1290 wmove(view->win, lineno, 0);
1291 wclrtoeol(view->win);
1292 }
1294 return view->ops->draw(view, line, lineno, selected);
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 wrefresh(view->win);
1309 }
1311 static void
1312 redraw_view(struct view *view)
1313 {
1314 wclear(view->win);
1315 redraw_view_from(view, 0);
1316 }
1319 static void
1320 update_view_title(struct view *view)
1321 {
1322 assert(view_is_displayed(view));
1324 if (view == display[current_view])
1325 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1326 else
1327 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1329 werase(view->title);
1330 wmove(view->title, 0, 0);
1332 if (*view->ref)
1333 wprintw(view->title, "[%s] %s", view->name, view->ref);
1334 else
1335 wprintw(view->title, "[%s]", view->name);
1337 if (view->lines || view->pipe) {
1338 unsigned int view_lines = view->offset + view->height;
1339 unsigned int lines = view->lines
1340 ? MIN(view_lines, view->lines) * 100 / view->lines
1341 : 0;
1343 wprintw(view->title, " - %s %d of %d (%d%%)",
1344 view->ops->type,
1345 view->lineno + 1,
1346 view->lines,
1347 lines);
1348 }
1350 if (view->pipe) {
1351 time_t secs = time(NULL) - view->start_time;
1353 /* Three git seconds are a long time ... */
1354 if (secs > 2)
1355 wprintw(view->title, " %lds", secs);
1356 }
1358 wmove(view->title, 0, view->width - 1);
1359 wrefresh(view->title);
1360 }
1362 static void
1363 resize_display(void)
1364 {
1365 int offset, i;
1366 struct view *base = display[0];
1367 struct view *view = display[1] ? display[1] : display[0];
1369 /* Setup window dimensions */
1371 getmaxyx(stdscr, base->height, base->width);
1373 /* Make room for the status window. */
1374 base->height -= 1;
1376 if (view != base) {
1377 /* Horizontal split. */
1378 view->width = base->width;
1379 view->height = SCALE_SPLIT_VIEW(base->height);
1380 base->height -= view->height;
1382 /* Make room for the title bar. */
1383 view->height -= 1;
1384 }
1386 /* Make room for the title bar. */
1387 base->height -= 1;
1389 offset = 0;
1391 foreach_displayed_view (view, i) {
1392 if (!view->win) {
1393 view->win = newwin(view->height, 0, offset, 0);
1394 if (!view->win)
1395 die("Failed to create %s view", view->name);
1397 scrollok(view->win, TRUE);
1399 view->title = newwin(1, 0, offset + view->height, 0);
1400 if (!view->title)
1401 die("Failed to create title window");
1403 } else {
1404 wresize(view->win, view->height, view->width);
1405 mvwin(view->win, offset, 0);
1406 mvwin(view->title, offset + view->height, 0);
1407 }
1409 offset += view->height + 1;
1410 }
1411 }
1413 static void
1414 redraw_display(void)
1415 {
1416 struct view *view;
1417 int i;
1419 foreach_displayed_view (view, i) {
1420 redraw_view(view);
1421 update_view_title(view);
1422 }
1423 }
1425 static void
1426 update_display_cursor(void)
1427 {
1428 struct view *view = display[current_view];
1430 /* Move the cursor to the right-most column of the cursor line.
1431 *
1432 * XXX: This could turn out to be a bit expensive, but it ensures that
1433 * the cursor does not jump around. */
1434 if (view->lines) {
1435 wmove(view->win, view->lineno - view->offset, view->width - 1);
1436 wrefresh(view->win);
1437 }
1438 }
1440 /*
1441 * Navigation
1442 */
1444 /* Scrolling backend */
1445 static void
1446 do_scroll_view(struct view *view, int lines)
1447 {
1448 bool redraw_current_line = FALSE;
1450 /* The rendering expects the new offset. */
1451 view->offset += lines;
1453 assert(0 <= view->offset && view->offset < view->lines);
1454 assert(lines);
1456 /* Move current line into the view. */
1457 if (view->lineno < view->offset) {
1458 view->lineno = view->offset;
1459 redraw_current_line = TRUE;
1460 } else if (view->lineno >= view->offset + view->height) {
1461 view->lineno = view->offset + view->height - 1;
1462 redraw_current_line = TRUE;
1463 }
1465 assert(view->offset <= view->lineno && view->lineno < view->lines);
1467 /* Redraw the whole screen if scrolling is pointless. */
1468 if (view->height < ABS(lines)) {
1469 redraw_view(view);
1471 } else {
1472 int line = lines > 0 ? view->height - lines : 0;
1473 int end = line + ABS(lines);
1475 wscrl(view->win, lines);
1477 for (; line < end; line++) {
1478 if (!draw_view_line(view, line))
1479 break;
1480 }
1482 if (redraw_current_line)
1483 draw_view_line(view, view->lineno - view->offset);
1484 }
1486 redrawwin(view->win);
1487 wrefresh(view->win);
1488 report("");
1489 }
1491 /* Scroll frontend */
1492 static void
1493 scroll_view(struct view *view, enum request request)
1494 {
1495 int lines = 1;
1497 assert(view_is_displayed(view));
1499 switch (request) {
1500 case REQ_SCROLL_PAGE_DOWN:
1501 lines = view->height;
1502 case REQ_SCROLL_LINE_DOWN:
1503 if (view->offset + lines > view->lines)
1504 lines = view->lines - view->offset;
1506 if (lines == 0 || view->offset + view->height >= view->lines) {
1507 report("Cannot scroll beyond the last line");
1508 return;
1509 }
1510 break;
1512 case REQ_SCROLL_PAGE_UP:
1513 lines = view->height;
1514 case REQ_SCROLL_LINE_UP:
1515 if (lines > view->offset)
1516 lines = view->offset;
1518 if (lines == 0) {
1519 report("Cannot scroll beyond the first line");
1520 return;
1521 }
1523 lines = -lines;
1524 break;
1526 default:
1527 die("request %d not handled in switch", request);
1528 }
1530 do_scroll_view(view, lines);
1531 }
1533 /* Cursor moving */
1534 static void
1535 move_view(struct view *view, enum request request)
1536 {
1537 int scroll_steps = 0;
1538 int steps;
1540 switch (request) {
1541 case REQ_MOVE_FIRST_LINE:
1542 steps = -view->lineno;
1543 break;
1545 case REQ_MOVE_LAST_LINE:
1546 steps = view->lines - view->lineno - 1;
1547 break;
1549 case REQ_MOVE_PAGE_UP:
1550 steps = view->height > view->lineno
1551 ? -view->lineno : -view->height;
1552 break;
1554 case REQ_MOVE_PAGE_DOWN:
1555 steps = view->lineno + view->height >= view->lines
1556 ? view->lines - view->lineno - 1 : view->height;
1557 break;
1559 case REQ_MOVE_UP:
1560 steps = -1;
1561 break;
1563 case REQ_MOVE_DOWN:
1564 steps = 1;
1565 break;
1567 default:
1568 die("request %d not handled in switch", request);
1569 }
1571 if (steps <= 0 && view->lineno == 0) {
1572 report("Cannot move beyond the first line");
1573 return;
1575 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1576 report("Cannot move beyond the last line");
1577 return;
1578 }
1580 /* Move the current line */
1581 view->lineno += steps;
1582 assert(0 <= view->lineno && view->lineno < view->lines);
1584 /* Check whether the view needs to be scrolled */
1585 if (view->lineno < view->offset ||
1586 view->lineno >= view->offset + view->height) {
1587 scroll_steps = steps;
1588 if (steps < 0 && -steps > view->offset) {
1589 scroll_steps = -view->offset;
1591 } else if (steps > 0) {
1592 if (view->lineno == view->lines - 1 &&
1593 view->lines > view->height) {
1594 scroll_steps = view->lines - view->offset - 1;
1595 if (scroll_steps >= view->height)
1596 scroll_steps -= view->height - 1;
1597 }
1598 }
1599 }
1601 if (!view_is_displayed(view)) {
1602 view->offset += steps;
1603 view->ops->select(view, &view->line[view->lineno]);
1604 return;
1605 }
1607 /* Repaint the old "current" line if we be scrolling */
1608 if (ABS(steps) < view->height)
1609 draw_view_line(view, view->lineno - steps - view->offset);
1611 if (scroll_steps) {
1612 do_scroll_view(view, scroll_steps);
1613 return;
1614 }
1616 /* Draw the current line */
1617 draw_view_line(view, view->lineno - view->offset);
1619 redrawwin(view->win);
1620 wrefresh(view->win);
1621 report("");
1622 }
1625 /*
1626 * Searching
1627 */
1629 static void search_view(struct view *view, enum request request);
1631 static bool
1632 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1633 {
1634 assert(view_is_displayed(view));
1636 if (!view->ops->grep(view, line))
1637 return FALSE;
1639 if (lineno - view->offset >= view->height) {
1640 view->offset = lineno;
1641 view->lineno = lineno;
1642 redraw_view(view);
1644 } else {
1645 unsigned long old_lineno = view->lineno - view->offset;
1647 view->lineno = lineno;
1648 draw_view_line(view, old_lineno);
1650 draw_view_line(view, view->lineno - view->offset);
1651 redrawwin(view->win);
1652 wrefresh(view->win);
1653 }
1655 report("Line %ld matches '%s'", lineno + 1, view->grep);
1656 return TRUE;
1657 }
1659 static void
1660 find_next(struct view *view, enum request request)
1661 {
1662 unsigned long lineno = view->lineno;
1663 int direction;
1665 if (!*view->grep) {
1666 if (!*opt_search)
1667 report("No previous search");
1668 else
1669 search_view(view, request);
1670 return;
1671 }
1673 switch (request) {
1674 case REQ_SEARCH:
1675 case REQ_FIND_NEXT:
1676 direction = 1;
1677 break;
1679 case REQ_SEARCH_BACK:
1680 case REQ_FIND_PREV:
1681 direction = -1;
1682 break;
1684 default:
1685 return;
1686 }
1688 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1689 lineno += direction;
1691 /* Note, lineno is unsigned long so will wrap around in which case it
1692 * will become bigger than view->lines. */
1693 for (; lineno < view->lines; lineno += direction) {
1694 struct line *line = &view->line[lineno];
1696 if (find_next_line(view, lineno, line))
1697 return;
1698 }
1700 report("No match found for '%s'", view->grep);
1701 }
1703 static void
1704 search_view(struct view *view, enum request request)
1705 {
1706 int regex_err;
1708 if (view->regex) {
1709 regfree(view->regex);
1710 *view->grep = 0;
1711 } else {
1712 view->regex = calloc(1, sizeof(*view->regex));
1713 if (!view->regex)
1714 return;
1715 }
1717 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1718 if (regex_err != 0) {
1719 char buf[SIZEOF_STR] = "unknown error";
1721 regerror(regex_err, view->regex, buf, sizeof(buf));
1722 report("Search failed: %s", buf);
1723 return;
1724 }
1726 string_copy(view->grep, opt_search);
1728 find_next(view, request);
1729 }
1731 /*
1732 * Incremental updating
1733 */
1735 static void
1736 end_update(struct view *view)
1737 {
1738 if (!view->pipe)
1739 return;
1740 set_nonblocking_input(FALSE);
1741 if (view->pipe == stdin)
1742 fclose(view->pipe);
1743 else
1744 pclose(view->pipe);
1745 view->pipe = NULL;
1746 }
1748 static bool
1749 begin_update(struct view *view)
1750 {
1751 const char *id = view->id;
1753 if (view->pipe)
1754 end_update(view);
1756 if (opt_cmd[0]) {
1757 string_copy(view->cmd, opt_cmd);
1758 opt_cmd[0] = 0;
1759 /* When running random commands, the view ref could have become
1760 * invalid so clear it. */
1761 view->ref[0] = 0;
1763 } else if (view == VIEW(REQ_VIEW_TREE)) {
1764 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1766 if (strcmp(view->vid, view->id))
1767 opt_path[0] = 0;
1769 if (!string_format(view->cmd, format, id, opt_path))
1770 return FALSE;
1772 } else {
1773 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1775 if (!string_format(view->cmd, format, id, id, id, id, id))
1776 return FALSE;
1777 }
1779 /* Special case for the pager view. */
1780 if (opt_pipe) {
1781 view->pipe = opt_pipe;
1782 opt_pipe = NULL;
1783 } else {
1784 view->pipe = popen(view->cmd, "r");
1785 }
1787 if (!view->pipe)
1788 return FALSE;
1790 set_nonblocking_input(TRUE);
1792 view->offset = 0;
1793 view->lines = 0;
1794 view->lineno = 0;
1795 string_copy(view->vid, id);
1797 if (view->line) {
1798 int i;
1800 for (i = 0; i < view->lines; i++)
1801 if (view->line[i].data)
1802 free(view->line[i].data);
1804 free(view->line);
1805 view->line = NULL;
1806 }
1808 view->start_time = time(NULL);
1810 return TRUE;
1811 }
1813 static struct line *
1814 realloc_lines(struct view *view, size_t line_size)
1815 {
1816 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1818 if (!tmp)
1819 return NULL;
1821 view->line = tmp;
1822 view->line_size = line_size;
1823 return view->line;
1824 }
1826 static bool
1827 update_view(struct view *view)
1828 {
1829 char in_buffer[BUFSIZ];
1830 char out_buffer[BUFSIZ * 2];
1831 char *line;
1832 /* The number of lines to read. If too low it will cause too much
1833 * redrawing (and possible flickering), if too high responsiveness
1834 * will suffer. */
1835 unsigned long lines = view->height;
1836 int redraw_from = -1;
1838 if (!view->pipe)
1839 return TRUE;
1841 /* Only redraw if lines are visible. */
1842 if (view->offset + view->height >= view->lines)
1843 redraw_from = view->lines - view->offset;
1845 /* FIXME: This is probably not perfect for backgrounded views. */
1846 if (!realloc_lines(view, view->lines + lines))
1847 goto alloc_error;
1849 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1850 size_t linelen = strlen(line);
1852 if (linelen)
1853 line[linelen - 1] = 0;
1855 if (opt_iconv != ICONV_NONE) {
1856 char *inbuf = line;
1857 size_t inlen = linelen;
1859 char *outbuf = out_buffer;
1860 size_t outlen = sizeof(out_buffer);
1862 size_t ret;
1864 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1865 if (ret != (size_t) -1) {
1866 line = out_buffer;
1867 linelen = strlen(out_buffer);
1868 }
1869 }
1871 if (!view->ops->read(view, line))
1872 goto alloc_error;
1874 if (lines-- == 1)
1875 break;
1876 }
1878 {
1879 int digits;
1881 lines = view->lines;
1882 for (digits = 0; lines; digits++)
1883 lines /= 10;
1885 /* Keep the displayed view in sync with line number scaling. */
1886 if (digits != view->digits) {
1887 view->digits = digits;
1888 redraw_from = 0;
1889 }
1890 }
1892 if (!view_is_displayed(view))
1893 goto check_pipe;
1895 if (view == VIEW(REQ_VIEW_TREE)) {
1896 /* Clear the view and redraw everything since the tree sorting
1897 * might have rearranged things. */
1898 redraw_view(view);
1900 } else if (redraw_from >= 0) {
1901 /* If this is an incremental update, redraw the previous line
1902 * since for commits some members could have changed when
1903 * loading the main view. */
1904 if (redraw_from > 0)
1905 redraw_from--;
1907 /* Incrementally draw avoids flickering. */
1908 redraw_view_from(view, redraw_from);
1909 }
1911 /* Update the title _after_ the redraw so that if the redraw picks up a
1912 * commit reference in view->ref it'll be available here. */
1913 update_view_title(view);
1915 check_pipe:
1916 if (ferror(view->pipe)) {
1917 report("Failed to read: %s", strerror(errno));
1918 goto end;
1920 } else if (feof(view->pipe)) {
1921 report("");
1922 goto end;
1923 }
1925 return TRUE;
1927 alloc_error:
1928 report("Allocation failure");
1930 end:
1931 end_update(view);
1932 return FALSE;
1933 }
1936 /*
1937 * View opening
1938 */
1940 static void open_help_view(struct view *view)
1941 {
1942 char buf[BUFSIZ];
1943 int lines = ARRAY_SIZE(req_info) + 2;
1944 int i;
1946 if (view->lines > 0)
1947 return;
1949 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1950 if (!req_info[i].request)
1951 lines++;
1953 view->line = calloc(lines, sizeof(*view->line));
1954 if (!view->line) {
1955 report("Allocation failure");
1956 return;
1957 }
1959 view->ops->read(view, "Quick reference for tig keybindings:");
1961 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1962 char *key;
1964 if (!req_info[i].request) {
1965 view->ops->read(view, "");
1966 view->ops->read(view, req_info[i].help);
1967 continue;
1968 }
1970 key = get_key(req_info[i].request);
1971 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1972 continue;
1974 view->ops->read(view, buf);
1975 }
1976 }
1978 enum open_flags {
1979 OPEN_DEFAULT = 0, /* Use default view switching. */
1980 OPEN_SPLIT = 1, /* Split current view. */
1981 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1982 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1983 };
1985 static void
1986 open_view(struct view *prev, enum request request, enum open_flags flags)
1987 {
1988 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1989 bool split = !!(flags & OPEN_SPLIT);
1990 bool reload = !!(flags & OPEN_RELOAD);
1991 struct view *view = VIEW(request);
1992 int nviews = displayed_views();
1993 struct view *base_view = display[0];
1995 if (view == prev && nviews == 1 && !reload) {
1996 report("Already in %s view", view->name);
1997 return;
1998 }
2000 if (view == VIEW(REQ_VIEW_HELP)) {
2001 open_help_view(view);
2003 } else if ((reload || strcmp(view->vid, view->id)) &&
2004 !begin_update(view)) {
2005 report("Failed to load %s view", view->name);
2006 return;
2007 }
2009 if (split) {
2010 display[1] = view;
2011 if (!backgrounded)
2012 current_view = 1;
2013 } else {
2014 /* Maximize the current view. */
2015 memset(display, 0, sizeof(display));
2016 current_view = 0;
2017 display[current_view] = view;
2018 }
2020 /* Resize the view when switching between split- and full-screen,
2021 * or when switching between two different full-screen views. */
2022 if (nviews != displayed_views() ||
2023 (nviews == 1 && base_view != display[0]))
2024 resize_display();
2026 if (split && prev->lineno - prev->offset >= prev->height) {
2027 /* Take the title line into account. */
2028 int lines = prev->lineno - prev->offset - prev->height + 1;
2030 /* Scroll the view that was split if the current line is
2031 * outside the new limited view. */
2032 do_scroll_view(prev, lines);
2033 }
2035 if (prev && view != prev) {
2036 if (split && !backgrounded) {
2037 /* "Blur" the previous view. */
2038 update_view_title(prev);
2039 }
2041 view->parent = prev;
2042 }
2044 if (view->pipe && view->lines == 0) {
2045 /* Clear the old view and let the incremental updating refill
2046 * the screen. */
2047 wclear(view->win);
2048 report("");
2049 } else {
2050 redraw_view(view);
2051 report("");
2052 }
2054 /* If the view is backgrounded the above calls to report()
2055 * won't redraw the view title. */
2056 if (backgrounded)
2057 update_view_title(view);
2058 }
2061 /*
2062 * User request switch noodle
2063 */
2065 static int
2066 view_driver(struct view *view, enum request request)
2067 {
2068 int i;
2070 switch (request) {
2071 case REQ_MOVE_UP:
2072 case REQ_MOVE_DOWN:
2073 case REQ_MOVE_PAGE_UP:
2074 case REQ_MOVE_PAGE_DOWN:
2075 case REQ_MOVE_FIRST_LINE:
2076 case REQ_MOVE_LAST_LINE:
2077 move_view(view, request);
2078 break;
2080 case REQ_SCROLL_LINE_DOWN:
2081 case REQ_SCROLL_LINE_UP:
2082 case REQ_SCROLL_PAGE_DOWN:
2083 case REQ_SCROLL_PAGE_UP:
2084 scroll_view(view, request);
2085 break;
2087 case REQ_VIEW_BLOB:
2088 if (!ref_blob[0]) {
2089 report("No file chosen, press 't' to open tree view");
2090 break;
2091 }
2092 /* Fall-through */
2093 case REQ_VIEW_MAIN:
2094 case REQ_VIEW_DIFF:
2095 case REQ_VIEW_LOG:
2096 case REQ_VIEW_TREE:
2097 case REQ_VIEW_HELP:
2098 case REQ_VIEW_PAGER:
2099 open_view(view, request, OPEN_DEFAULT);
2100 break;
2102 case REQ_NEXT:
2103 case REQ_PREVIOUS:
2104 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2106 if ((view == VIEW(REQ_VIEW_DIFF) &&
2107 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2108 (view == VIEW(REQ_VIEW_BLOB) &&
2109 view->parent == VIEW(REQ_VIEW_TREE))) {
2110 view = view->parent;
2111 move_view(view, request);
2112 if (view_is_displayed(view))
2113 update_view_title(view);
2114 } else {
2115 move_view(view, request);
2116 break;
2117 }
2118 /* Fall-through */
2120 case REQ_ENTER:
2121 if (!view->lines) {
2122 report("Nothing to enter");
2123 break;
2124 }
2125 return view->ops->enter(view, &view->line[view->lineno]);
2127 case REQ_VIEW_NEXT:
2128 {
2129 int nviews = displayed_views();
2130 int next_view = (current_view + 1) % nviews;
2132 if (next_view == current_view) {
2133 report("Only one view is displayed");
2134 break;
2135 }
2137 current_view = next_view;
2138 /* Blur out the title of the previous view. */
2139 update_view_title(view);
2140 report("");
2141 break;
2142 }
2143 case REQ_TOGGLE_LINENO:
2144 opt_line_number = !opt_line_number;
2145 redraw_display();
2146 break;
2148 case REQ_TOGGLE_REV_GRAPH:
2149 opt_rev_graph = !opt_rev_graph;
2150 redraw_display();
2151 break;
2153 case REQ_PROMPT:
2154 /* Always reload^Wrerun commands from the prompt. */
2155 open_view(view, opt_request, OPEN_RELOAD);
2156 break;
2158 case REQ_SEARCH:
2159 case REQ_SEARCH_BACK:
2160 search_view(view, request);
2161 break;
2163 case REQ_FIND_NEXT:
2164 case REQ_FIND_PREV:
2165 find_next(view, request);
2166 break;
2168 case REQ_STOP_LOADING:
2169 for (i = 0; i < ARRAY_SIZE(views); i++) {
2170 view = &views[i];
2171 if (view->pipe)
2172 report("Stopped loading the %s view", view->name),
2173 end_update(view);
2174 }
2175 break;
2177 case REQ_SHOW_VERSION:
2178 report("%s (built %s)", VERSION, __DATE__);
2179 return TRUE;
2181 case REQ_SCREEN_RESIZE:
2182 resize_display();
2183 /* Fall-through */
2184 case REQ_SCREEN_REDRAW:
2185 redraw_display();
2186 break;
2188 case REQ_NONE:
2189 doupdate();
2190 return TRUE;
2192 case REQ_VIEW_CLOSE:
2193 /* XXX: Mark closed views by letting view->parent point to the
2194 * view itself. Parents to closed view should never be
2195 * followed. */
2196 if (view->parent &&
2197 view->parent->parent != view->parent) {
2198 memset(display, 0, sizeof(display));
2199 current_view = 0;
2200 display[current_view] = view->parent;
2201 view->parent = view;
2202 resize_display();
2203 redraw_display();
2204 break;
2205 }
2206 /* Fall-through */
2207 case REQ_QUIT:
2208 return FALSE;
2210 default:
2211 /* An unknown key will show most commonly used commands. */
2212 report("Unknown key, press 'h' for help");
2213 return TRUE;
2214 }
2216 return TRUE;
2217 }
2220 /*
2221 * Pager backend
2222 */
2224 static bool
2225 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2226 {
2227 char *text = line->data;
2228 enum line_type type = line->type;
2229 int textlen = strlen(text);
2230 int attr;
2232 wmove(view->win, lineno, 0);
2234 if (selected) {
2235 type = LINE_CURSOR;
2236 wchgat(view->win, -1, 0, type, NULL);
2237 }
2239 attr = get_line_attr(type);
2240 wattrset(view->win, attr);
2242 if (opt_line_number || opt_tab_size < TABSIZE) {
2243 static char spaces[] = " ";
2244 int col_offset = 0, col = 0;
2246 if (opt_line_number) {
2247 unsigned long real_lineno = view->offset + lineno + 1;
2249 if (real_lineno == 1 ||
2250 (real_lineno % opt_num_interval) == 0) {
2251 wprintw(view->win, "%.*d", view->digits, real_lineno);
2253 } else {
2254 waddnstr(view->win, spaces,
2255 MIN(view->digits, STRING_SIZE(spaces)));
2256 }
2257 waddstr(view->win, ": ");
2258 col_offset = view->digits + 2;
2259 }
2261 while (text && col_offset + col < view->width) {
2262 int cols_max = view->width - col_offset - col;
2263 char *pos = text;
2264 int cols;
2266 if (*text == '\t') {
2267 text++;
2268 assert(sizeof(spaces) > TABSIZE);
2269 pos = spaces;
2270 cols = opt_tab_size - (col % opt_tab_size);
2272 } else {
2273 text = strchr(text, '\t');
2274 cols = line ? text - pos : strlen(pos);
2275 }
2277 waddnstr(view->win, pos, MIN(cols, cols_max));
2278 col += cols;
2279 }
2281 } else {
2282 int col = 0, pos = 0;
2284 for (; pos < textlen && col < view->width; pos++, col++)
2285 if (text[pos] == '\t')
2286 col += TABSIZE - (col % TABSIZE) - 1;
2288 waddnstr(view->win, text, pos);
2289 }
2291 return TRUE;
2292 }
2294 static bool
2295 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2296 {
2297 char refbuf[SIZEOF_STR];
2298 char *ref = NULL;
2299 FILE *pipe;
2301 if (!string_format(refbuf, "git describe %s", commit_id))
2302 return TRUE;
2304 pipe = popen(refbuf, "r");
2305 if (!pipe)
2306 return TRUE;
2308 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2309 ref = chomp_string(ref);
2310 pclose(pipe);
2312 if (!ref || !*ref)
2313 return TRUE;
2315 /* This is the only fatal call, since it can "corrupt" the buffer. */
2316 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2317 return FALSE;
2319 return TRUE;
2320 }
2322 static void
2323 add_pager_refs(struct view *view, struct line *line)
2324 {
2325 char buf[SIZEOF_STR];
2326 char *commit_id = line->data + STRING_SIZE("commit ");
2327 struct ref **refs;
2328 size_t bufpos = 0, refpos = 0;
2329 const char *sep = "Refs: ";
2330 bool is_tag = FALSE;
2332 assert(line->type == LINE_COMMIT);
2334 refs = get_refs(commit_id);
2335 if (!refs) {
2336 if (view == VIEW(REQ_VIEW_DIFF))
2337 goto try_add_describe_ref;
2338 return;
2339 }
2341 do {
2342 struct ref *ref = refs[refpos];
2343 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2345 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2346 return;
2347 sep = ", ";
2348 if (ref->tag)
2349 is_tag = TRUE;
2350 } while (refs[refpos++]->next);
2352 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2353 try_add_describe_ref:
2354 /* Add <tag>-g<commit_id> "fake" reference. */
2355 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2356 return;
2357 }
2359 if (bufpos == 0)
2360 return;
2362 if (!realloc_lines(view, view->line_size + 1))
2363 return;
2365 line = &view->line[view->lines];
2366 line->data = strdup(buf);
2367 if (!line->data)
2368 return;
2370 line->type = LINE_PP_REFS;
2371 view->lines++;
2372 }
2374 static bool
2375 pager_read(struct view *view, char *data)
2376 {
2377 struct line *line = &view->line[view->lines];
2379 line->data = strdup(data);
2380 if (!line->data)
2381 return FALSE;
2383 line->type = get_line_type(line->data);
2384 view->lines++;
2386 if (line->type == LINE_COMMIT &&
2387 (view == VIEW(REQ_VIEW_DIFF) ||
2388 view == VIEW(REQ_VIEW_LOG)))
2389 add_pager_refs(view, line);
2391 return TRUE;
2392 }
2394 static bool
2395 pager_enter(struct view *view, struct line *line)
2396 {
2397 int split = 0;
2399 if (line->type == LINE_COMMIT &&
2400 (view == VIEW(REQ_VIEW_LOG) ||
2401 view == VIEW(REQ_VIEW_PAGER))) {
2402 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2403 split = 1;
2404 }
2406 /* Always scroll the view even if it was split. That way
2407 * you can use Enter to scroll through the log view and
2408 * split open each commit diff. */
2409 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2411 /* FIXME: A minor workaround. Scrolling the view will call report("")
2412 * but if we are scrolling a non-current view this won't properly
2413 * update the view title. */
2414 if (split)
2415 update_view_title(view);
2417 return TRUE;
2418 }
2420 static bool
2421 pager_grep(struct view *view, struct line *line)
2422 {
2423 regmatch_t pmatch;
2424 char *text = line->data;
2426 if (!*text)
2427 return FALSE;
2429 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2430 return FALSE;
2432 return TRUE;
2433 }
2435 static void
2436 pager_select(struct view *view, struct line *line)
2437 {
2438 if (line->type == LINE_COMMIT) {
2439 char *text = line->data;
2441 string_copy(view->ref, text + STRING_SIZE("commit "));
2442 string_copy(ref_commit, view->ref);
2443 }
2444 }
2446 static struct view_ops pager_ops = {
2447 "line",
2448 pager_draw,
2449 pager_read,
2450 pager_enter,
2451 pager_grep,
2452 pager_select,
2453 };
2456 /*
2457 * Tree backend
2458 */
2460 /* Parse output from git-ls-tree(1):
2461 *
2462 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2463 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2464 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2465 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2466 */
2468 #define SIZEOF_TREE_ATTR \
2469 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2471 #define TREE_UP_FORMAT "040000 tree %s\t.."
2473 static int
2474 tree_compare_entry(enum line_type type1, char *name1,
2475 enum line_type type2, char *name2)
2476 {
2477 if (type1 != type2) {
2478 if (type1 == LINE_TREE_DIR)
2479 return -1;
2480 return 1;
2481 }
2483 return strcmp(name1, name2);
2484 }
2486 static bool
2487 tree_read(struct view *view, char *text)
2488 {
2489 size_t textlen = strlen(text);
2490 char buf[SIZEOF_STR];
2491 unsigned long pos;
2492 enum line_type type;
2493 bool first_read = view->lines == 0;
2495 if (textlen <= SIZEOF_TREE_ATTR)
2496 return FALSE;
2498 type = text[STRING_SIZE("100644 ")] == 't'
2499 ? LINE_TREE_DIR : LINE_TREE_FILE;
2501 if (first_read) {
2502 /* Add path info line */
2503 if (string_format(buf, "Directory path /%s", opt_path) &&
2504 realloc_lines(view, view->line_size + 1) &&
2505 pager_read(view, buf))
2506 view->line[view->lines - 1].type = LINE_DEFAULT;
2507 else
2508 return FALSE;
2510 /* Insert "link" to parent directory. */
2511 if (*opt_path &&
2512 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2513 realloc_lines(view, view->line_size + 1) &&
2514 pager_read(view, buf))
2515 view->line[view->lines - 1].type = LINE_TREE_DIR;
2516 else if (*opt_path)
2517 return FALSE;
2518 }
2520 /* Strip the path part ... */
2521 if (*opt_path) {
2522 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2523 size_t striplen = strlen(opt_path);
2524 char *path = text + SIZEOF_TREE_ATTR;
2526 if (pathlen > striplen)
2527 memmove(path, path + striplen,
2528 pathlen - striplen + 1);
2529 }
2531 /* Skip "Directory ..." and ".." line. */
2532 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2533 struct line *line = &view->line[pos];
2534 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2535 char *path2 = text + SIZEOF_TREE_ATTR;
2536 int cmp = tree_compare_entry(line->type, path1, type, path2);
2538 if (cmp <= 0)
2539 continue;
2541 text = strdup(text);
2542 if (!text)
2543 return FALSE;
2545 if (view->lines > pos)
2546 memmove(&view->line[pos + 1], &view->line[pos],
2547 (view->lines - pos) * sizeof(*line));
2549 line = &view->line[pos];
2550 line->data = text;
2551 line->type = type;
2552 view->lines++;
2553 return TRUE;
2554 }
2556 if (!pager_read(view, text))
2557 return FALSE;
2559 /* Move the current line to the first tree entry. */
2560 if (first_read)
2561 view->lineno++;
2563 view->line[view->lines - 1].type = type;
2564 return TRUE;
2565 }
2567 static bool
2568 tree_enter(struct view *view, struct line *line)
2569 {
2570 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2571 enum request request;
2573 switch (line->type) {
2574 case LINE_TREE_DIR:
2575 /* Depending on whether it is a subdir or parent (updir?) link
2576 * mangle the path buffer. */
2577 if (line == &view->line[1] && *opt_path) {
2578 size_t path_len = strlen(opt_path);
2579 char *dirsep = opt_path + path_len - 1;
2581 while (dirsep > opt_path && dirsep[-1] != '/')
2582 dirsep--;
2584 dirsep[0] = 0;
2586 } else {
2587 size_t pathlen = strlen(opt_path);
2588 size_t origlen = pathlen;
2589 char *data = line->data;
2590 char *basename = data + SIZEOF_TREE_ATTR;
2592 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2593 opt_path[origlen] = 0;
2594 return TRUE;
2595 }
2596 }
2598 /* Trees and subtrees share the same ID, so they are not not
2599 * unique like blobs. */
2600 flags |= OPEN_RELOAD;
2601 request = REQ_VIEW_TREE;
2602 break;
2604 case LINE_TREE_FILE:
2605 request = REQ_VIEW_BLOB;
2606 break;
2608 default:
2609 return TRUE;
2610 }
2612 open_view(view, request, flags);
2614 return TRUE;
2615 }
2617 static void
2618 tree_select(struct view *view, struct line *line)
2619 {
2620 char *text = line->data;
2622 text += STRING_SIZE("100644 blob ");
2624 if (line->type == LINE_TREE_FILE) {
2625 string_ncopy(ref_blob, text, 40);
2626 /* Also update the blob view's ref, since all there must always
2627 * be in sync. */
2628 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2630 } else if (line->type != LINE_TREE_DIR) {
2631 return;
2632 }
2634 string_ncopy(view->ref, text, 40);
2635 }
2637 static struct view_ops tree_ops = {
2638 "file",
2639 pager_draw,
2640 tree_read,
2641 tree_enter,
2642 pager_grep,
2643 tree_select,
2644 };
2646 static bool
2647 blob_read(struct view *view, char *line)
2648 {
2649 bool state = pager_read(view, line);
2651 if (state == TRUE)
2652 view->line[view->lines - 1].type = LINE_DEFAULT;
2654 return state;
2655 }
2657 static struct view_ops blob_ops = {
2658 "line",
2659 pager_draw,
2660 blob_read,
2661 pager_enter,
2662 pager_grep,
2663 pager_select,
2664 };
2667 /*
2668 * Revision graph
2669 */
2671 struct commit {
2672 char id[SIZEOF_REV]; /* SHA1 ID. */
2673 char title[75]; /* First line of the commit message. */
2674 char author[75]; /* Author of the commit. */
2675 struct tm time; /* Date from the author ident. */
2676 struct ref **refs; /* Repository references. */
2677 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2678 size_t graph_size; /* The width of the graph array. */
2679 };
2681 /* Size of rev graph with no "padding" columns */
2682 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
2684 struct rev_graph {
2685 struct rev_graph *prev, *next, *parents;
2686 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
2687 size_t size;
2688 struct commit *commit;
2689 size_t pos;
2690 };
2692 /* Parents of the commit being visualized. */
2693 static struct rev_graph graph_parents[3];
2695 /* The current stack of revisions on the graph. */
2696 static struct rev_graph graph_stacks[3] = {
2697 { &graph_stacks[2], &graph_stacks[1], &graph_parents[0] },
2698 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
2699 { &graph_stacks[1], &graph_stacks[0], &graph_parents[2] },
2700 };
2702 static inline bool
2703 graph_parent_is_merge(struct rev_graph *graph)
2704 {
2705 return graph->parents->size > 1;
2706 }
2708 static inline void
2709 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
2710 {
2711 if (graph->commit->graph_size < ARRAY_SIZE(graph->commit->graph) - 1)
2712 graph->commit->graph[graph->commit->graph_size++] = symbol;
2713 }
2715 static void
2716 done_rev_graph(struct rev_graph *graph)
2717 {
2718 if (graph_parent_is_merge(graph) &&
2719 graph->pos < graph->size - 1 &&
2720 graph->next->size == graph->size + graph->parents->size - 1) {
2721 size_t i = graph->pos + graph->parents->size - 1;
2723 graph->commit->graph_size = i * 2;
2724 while (i < graph->next->size - 1) {
2725 append_to_rev_graph(graph, ' ');
2726 append_to_rev_graph(graph, '\\');
2727 i++;
2728 }
2729 }
2731 graph->size = graph->pos = 0;
2732 graph->commit = NULL;
2733 memset(graph->parents, 0, sizeof(*graph->parents));
2734 }
2736 static void
2737 push_rev_graph(struct rev_graph *graph, char *parent)
2738 {
2739 /* Combine duplicate parents lines. */
2740 if (graph->size > 0 &&
2741 !strncmp(graph->rev[graph->size - 1], parent, SIZEOF_REV))
2742 return;
2744 if (graph->size < SIZEOF_REVITEMS) {
2745 string_ncopy(graph->rev[graph->size++], parent, SIZEOF_REV);
2746 }
2747 }
2749 static void
2750 draw_rev_graph(struct rev_graph *graph)
2751 {
2752 chtype symbol, separator, line;
2753 size_t i;
2755 /* Place the symbol for this commit. */
2756 if (graph->parents->size == 0)
2757 symbol = REVGRAPH_INIT;
2758 else if (graph->parents->size > 1)
2759 symbol = REVGRAPH_MERGE;
2760 else if (graph->pos >= graph->size)
2761 symbol = REVGRAPH_BRANCH;
2762 else
2763 symbol = REVGRAPH_COMMIT;
2765 separator = ' ';
2766 line = REVGRAPH_LINE;
2768 for (i = 0; i < graph->pos; i++) {
2769 append_to_rev_graph(graph, line);
2770 if (graph_parent_is_merge(graph->prev) &&
2771 graph->prev->pos == i) {
2772 separator = '`';
2773 line = '.';
2774 }
2775 append_to_rev_graph(graph, separator);
2776 }
2778 append_to_rev_graph(graph, symbol);
2780 if (graph->prev->size > graph->size) {
2781 separator = '\'';
2782 line = ' ';
2783 } else {
2784 separator = ' ';
2785 line = REVGRAPH_LINE;
2786 }
2787 i++;
2789 for (; i < graph->size; i++) {
2790 append_to_rev_graph(graph, separator);
2791 append_to_rev_graph(graph, line);
2792 if (graph_parent_is_merge(graph->prev)) {
2793 if (i < graph->prev->pos + graph->parents->size) {
2794 separator = '`';
2795 line = '.';
2796 }
2797 }
2798 if (graph->prev->size > graph->size) {
2799 separator = '/';
2800 line = ' ';
2801 }
2802 }
2804 if (graph->prev->size > graph->size) {
2805 append_to_rev_graph(graph, separator);
2806 if (line != ' ')
2807 append_to_rev_graph(graph, line);
2808 }
2809 }
2811 void
2812 update_rev_graph(struct rev_graph *graph)
2813 {
2814 size_t i;
2816 /* First, traverse all lines of revisions up to the active one. */
2817 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
2818 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
2819 break;
2821 push_rev_graph(graph->next, graph->rev[graph->pos]);
2822 }
2824 /* Interleave the new revision parent(s). */
2825 for (i = 0; i < graph->parents->size; i++)
2826 push_rev_graph(graph->next, graph->parents->rev[i]);
2828 /* Lastly, put any remaining revisions. */
2829 for (i = graph->pos + 1; i < graph->size; i++)
2830 push_rev_graph(graph->next, graph->rev[i]);
2832 draw_rev_graph(graph);
2833 done_rev_graph(graph->prev);
2834 }
2837 /*
2838 * Main view backend
2839 */
2841 static bool
2842 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2843 {
2844 char buf[DATE_COLS + 1];
2845 struct commit *commit = line->data;
2846 enum line_type type;
2847 int col = 0;
2848 size_t timelen;
2849 size_t authorlen;
2850 int trimmed = 1;
2852 if (!*commit->author)
2853 return FALSE;
2855 wmove(view->win, lineno, col);
2857 if (selected) {
2858 type = LINE_CURSOR;
2859 wattrset(view->win, get_line_attr(type));
2860 wchgat(view->win, -1, 0, type, NULL);
2862 } else {
2863 type = LINE_MAIN_COMMIT;
2864 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2865 }
2867 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2868 waddnstr(view->win, buf, timelen);
2869 waddstr(view->win, " ");
2871 col += DATE_COLS;
2872 wmove(view->win, lineno, col);
2873 if (type != LINE_CURSOR)
2874 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2876 if (opt_utf8) {
2877 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2878 } else {
2879 authorlen = strlen(commit->author);
2880 if (authorlen > AUTHOR_COLS - 2) {
2881 authorlen = AUTHOR_COLS - 2;
2882 trimmed = 1;
2883 }
2884 }
2886 if (trimmed) {
2887 waddnstr(view->win, commit->author, authorlen);
2888 if (type != LINE_CURSOR)
2889 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2890 waddch(view->win, '~');
2891 } else {
2892 waddstr(view->win, commit->author);
2893 }
2895 col += AUTHOR_COLS;
2896 if (type != LINE_CURSOR)
2897 wattrset(view->win, A_NORMAL);
2899 if (opt_rev_graph && commit->graph_size) {
2900 size_t i;
2902 wmove(view->win, lineno, col);
2903 /* Using waddch() instead of waddnstr() ensures that
2904 * they'll be rendered correctly for the cursor line. */
2905 for (i = 0; i < commit->graph_size; i++)
2906 waddch(view->win, commit->graph[i]);
2908 col += commit->graph_size + 1;
2909 }
2911 wmove(view->win, lineno, col);
2913 if (commit->refs) {
2914 size_t i = 0;
2916 do {
2917 if (type == LINE_CURSOR)
2918 ;
2919 else if (commit->refs[i]->tag)
2920 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2921 else
2922 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2923 waddstr(view->win, "[");
2924 waddstr(view->win, commit->refs[i]->name);
2925 waddstr(view->win, "]");
2926 if (type != LINE_CURSOR)
2927 wattrset(view->win, A_NORMAL);
2928 waddstr(view->win, " ");
2929 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2930 } while (commit->refs[i++]->next);
2931 }
2933 if (type != LINE_CURSOR)
2934 wattrset(view->win, get_line_attr(type));
2936 {
2937 int titlelen = strlen(commit->title);
2939 if (col + titlelen > view->width)
2940 titlelen = view->width - col;
2942 waddnstr(view->win, commit->title, titlelen);
2943 }
2945 return TRUE;
2946 }
2948 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2949 static bool
2950 main_read(struct view *view, char *line)
2951 {
2952 static struct rev_graph *graph = graph_stacks;
2953 enum line_type type = get_line_type(line);
2954 struct commit *commit = view->lines
2955 ? view->line[view->lines - 1].data : NULL;
2957 switch (type) {
2958 case LINE_COMMIT:
2959 commit = calloc(1, sizeof(struct commit));
2960 if (!commit)
2961 return FALSE;
2963 line += STRING_SIZE("commit ");
2965 view->line[view->lines++].data = commit;
2966 string_copy(commit->id, line);
2967 commit->refs = get_refs(commit->id);
2968 graph->commit = commit;
2969 break;
2971 case LINE_PARENT:
2972 if (commit) {
2973 line += STRING_SIZE("parent ");
2974 push_rev_graph(graph->parents, line);
2975 }
2976 break;
2978 case LINE_AUTHOR:
2979 {
2980 char *ident = line + STRING_SIZE("author ");
2981 char *end = strchr(ident, '<');
2983 if (!commit)
2984 break;
2986 update_rev_graph(graph);
2987 graph = graph->next;
2989 if (end) {
2990 char *email = end + 1;
2992 for (; end > ident && isspace(end[-1]); end--) ;
2994 if (end == ident && *email) {
2995 ident = email;
2996 end = strchr(ident, '>');
2997 for (; end > ident && isspace(end[-1]); end--) ;
2998 }
2999 *end = 0;
3000 }
3002 /* End is NULL or ident meaning there's no author. */
3003 if (end <= ident)
3004 ident = "Unknown";
3006 string_copy(commit->author, ident);
3008 /* Parse epoch and timezone */
3009 if (end) {
3010 char *secs = strchr(end + 1, '>');
3011 char *zone;
3012 time_t time;
3014 if (!secs || secs[1] != ' ')
3015 break;
3017 secs += 2;
3018 time = (time_t) atol(secs);
3019 zone = strchr(secs, ' ');
3020 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3021 long tz;
3023 zone++;
3024 tz = ('0' - zone[1]) * 60 * 60 * 10;
3025 tz += ('0' - zone[2]) * 60 * 60;
3026 tz += ('0' - zone[3]) * 60;
3027 tz += ('0' - zone[4]) * 60;
3029 if (zone[0] == '-')
3030 tz = -tz;
3032 time -= tz;
3033 }
3034 gmtime_r(&time, &commit->time);
3035 }
3036 break;
3037 }
3038 default:
3039 if (!commit)
3040 break;
3042 /* Fill in the commit title if it has not already been set. */
3043 if (commit->title[0])
3044 break;
3046 /* Require titles to start with a non-space character at the
3047 * offset used by git log. */
3048 /* FIXME: More gracefull handling of titles; append "..." to
3049 * shortened titles, etc. */
3050 if (strncmp(line, " ", 4) ||
3051 isspace(line[4]))
3052 break;
3054 string_copy(commit->title, line + 4);
3055 }
3057 return TRUE;
3058 }
3060 static bool
3061 main_enter(struct view *view, struct line *line)
3062 {
3063 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3065 open_view(view, REQ_VIEW_DIFF, flags);
3066 return TRUE;
3067 }
3069 static bool
3070 main_grep(struct view *view, struct line *line)
3071 {
3072 struct commit *commit = line->data;
3073 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
3074 char buf[DATE_COLS + 1];
3075 regmatch_t pmatch;
3077 for (state = S_TITLE; state < S_END; state++) {
3078 char *text;
3080 switch (state) {
3081 case S_TITLE: text = commit->title; break;
3082 case S_AUTHOR: text = commit->author; break;
3083 case S_DATE:
3084 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
3085 continue;
3086 text = buf;
3087 break;
3089 default:
3090 return FALSE;
3091 }
3093 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3094 return TRUE;
3095 }
3097 return FALSE;
3098 }
3100 static void
3101 main_select(struct view *view, struct line *line)
3102 {
3103 struct commit *commit = line->data;
3105 string_copy(view->ref, commit->id);
3106 string_copy(ref_commit, view->ref);
3107 }
3109 static struct view_ops main_ops = {
3110 "commit",
3111 main_draw,
3112 main_read,
3113 main_enter,
3114 main_grep,
3115 main_select,
3116 };
3119 /*
3120 * Unicode / UTF-8 handling
3121 *
3122 * NOTE: Much of the following code for dealing with unicode is derived from
3123 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
3124 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
3125 */
3127 /* I've (over)annotated a lot of code snippets because I am not entirely
3128 * confident that the approach taken by this small UTF-8 interface is correct.
3129 * --jonas */
3131 static inline int
3132 unicode_width(unsigned long c)
3133 {
3134 if (c >= 0x1100 &&
3135 (c <= 0x115f /* Hangul Jamo */
3136 || c == 0x2329
3137 || c == 0x232a
3138 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
3139 /* CJK ... Yi */
3140 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
3141 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
3142 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
3143 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
3144 || (c >= 0xffe0 && c <= 0xffe6)
3145 || (c >= 0x20000 && c <= 0x2fffd)
3146 || (c >= 0x30000 && c <= 0x3fffd)))
3147 return 2;
3149 return 1;
3150 }
3152 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3153 * Illegal bytes are set one. */
3154 static const unsigned char utf8_bytes[256] = {
3155 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,
3156 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,
3157 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,
3158 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,
3159 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,
3160 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,
3161 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,
3162 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,
3163 };
3165 /* Decode UTF-8 multi-byte representation into a unicode character. */
3166 static inline unsigned long
3167 utf8_to_unicode(const char *string, size_t length)
3168 {
3169 unsigned long unicode;
3171 switch (length) {
3172 case 1:
3173 unicode = string[0];
3174 break;
3175 case 2:
3176 unicode = (string[0] & 0x1f) << 6;
3177 unicode += (string[1] & 0x3f);
3178 break;
3179 case 3:
3180 unicode = (string[0] & 0x0f) << 12;
3181 unicode += ((string[1] & 0x3f) << 6);
3182 unicode += (string[2] & 0x3f);
3183 break;
3184 case 4:
3185 unicode = (string[0] & 0x0f) << 18;
3186 unicode += ((string[1] & 0x3f) << 12);
3187 unicode += ((string[2] & 0x3f) << 6);
3188 unicode += (string[3] & 0x3f);
3189 break;
3190 case 5:
3191 unicode = (string[0] & 0x0f) << 24;
3192 unicode += ((string[1] & 0x3f) << 18);
3193 unicode += ((string[2] & 0x3f) << 12);
3194 unicode += ((string[3] & 0x3f) << 6);
3195 unicode += (string[4] & 0x3f);
3196 break;
3197 case 6:
3198 unicode = (string[0] & 0x01) << 30;
3199 unicode += ((string[1] & 0x3f) << 24);
3200 unicode += ((string[2] & 0x3f) << 18);
3201 unicode += ((string[3] & 0x3f) << 12);
3202 unicode += ((string[4] & 0x3f) << 6);
3203 unicode += (string[5] & 0x3f);
3204 break;
3205 default:
3206 die("Invalid unicode length");
3207 }
3209 /* Invalid characters could return the special 0xfffd value but NUL
3210 * should be just as good. */
3211 return unicode > 0xffff ? 0 : unicode;
3212 }
3214 /* Calculates how much of string can be shown within the given maximum width
3215 * and sets trimmed parameter to non-zero value if all of string could not be
3216 * shown.
3217 *
3218 * Additionally, adds to coloffset how many many columns to move to align with
3219 * the expected position. Takes into account how multi-byte and double-width
3220 * characters will effect the cursor position.
3221 *
3222 * Returns the number of bytes to output from string to satisfy max_width. */
3223 static size_t
3224 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3225 {
3226 const char *start = string;
3227 const char *end = strchr(string, '\0');
3228 size_t mbwidth = 0;
3229 size_t width = 0;
3231 *trimmed = 0;
3233 while (string < end) {
3234 int c = *(unsigned char *) string;
3235 unsigned char bytes = utf8_bytes[c];
3236 size_t ucwidth;
3237 unsigned long unicode;
3239 if (string + bytes > end)
3240 break;
3242 /* Change representation to figure out whether
3243 * it is a single- or double-width character. */
3245 unicode = utf8_to_unicode(string, bytes);
3246 /* FIXME: Graceful handling of invalid unicode character. */
3247 if (!unicode)
3248 break;
3250 ucwidth = unicode_width(unicode);
3251 width += ucwidth;
3252 if (width > max_width) {
3253 *trimmed = 1;
3254 break;
3255 }
3257 /* The column offset collects the differences between the
3258 * number of bytes encoding a character and the number of
3259 * columns will be used for rendering said character.
3260 *
3261 * So if some character A is encoded in 2 bytes, but will be
3262 * represented on the screen using only 1 byte this will and up
3263 * adding 1 to the multi-byte column offset.
3264 *
3265 * Assumes that no double-width character can be encoding in
3266 * less than two bytes. */
3267 if (bytes > ucwidth)
3268 mbwidth += bytes - ucwidth;
3270 string += bytes;
3271 }
3273 *coloffset += mbwidth;
3275 return string - start;
3276 }
3279 /*
3280 * Status management
3281 */
3283 /* Whether or not the curses interface has been initialized. */
3284 static bool cursed = FALSE;
3286 /* The status window is used for polling keystrokes. */
3287 static WINDOW *status_win;
3289 /* Update status and title window. */
3290 static void
3291 report(const char *msg, ...)
3292 {
3293 static bool empty = TRUE;
3294 struct view *view = display[current_view];
3296 if (!empty || *msg) {
3297 va_list args;
3299 va_start(args, msg);
3301 werase(status_win);
3302 wmove(status_win, 0, 0);
3303 if (*msg) {
3304 vwprintw(status_win, msg, args);
3305 empty = FALSE;
3306 } else {
3307 empty = TRUE;
3308 }
3309 wrefresh(status_win);
3311 va_end(args);
3312 }
3314 update_view_title(view);
3315 update_display_cursor();
3316 }
3318 /* Controls when nodelay should be in effect when polling user input. */
3319 static void
3320 set_nonblocking_input(bool loading)
3321 {
3322 static unsigned int loading_views;
3324 if ((loading == FALSE && loading_views-- == 1) ||
3325 (loading == TRUE && loading_views++ == 0))
3326 nodelay(status_win, loading);
3327 }
3329 static void
3330 init_display(void)
3331 {
3332 int x, y;
3334 /* Initialize the curses library */
3335 if (isatty(STDIN_FILENO)) {
3336 cursed = !!initscr();
3337 } else {
3338 /* Leave stdin and stdout alone when acting as a pager. */
3339 FILE *io = fopen("/dev/tty", "r+");
3341 if (!io)
3342 die("Failed to open /dev/tty");
3343 cursed = !!newterm(NULL, io, io);
3344 }
3346 if (!cursed)
3347 die("Failed to initialize curses");
3349 nonl(); /* Tell curses not to do NL->CR/NL on output */
3350 cbreak(); /* Take input chars one at a time, no wait for \n */
3351 noecho(); /* Don't echo input */
3352 leaveok(stdscr, TRUE);
3354 if (has_colors())
3355 init_colors();
3357 getmaxyx(stdscr, y, x);
3358 status_win = newwin(1, 0, y - 1, 0);
3359 if (!status_win)
3360 die("Failed to create status window");
3362 /* Enable keyboard mapping */
3363 keypad(status_win, TRUE);
3364 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3365 }
3367 static char *
3368 read_prompt(const char *prompt)
3369 {
3370 enum { READING, STOP, CANCEL } status = READING;
3371 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3372 int pos = 0;
3374 while (status == READING) {
3375 struct view *view;
3376 int i, key;
3378 foreach_view (view, i)
3379 update_view(view);
3381 report("%s%.*s", prompt, pos, buf);
3382 /* Refresh, accept single keystroke of input */
3383 key = wgetch(status_win);
3384 switch (key) {
3385 case KEY_RETURN:
3386 case KEY_ENTER:
3387 case '\n':
3388 status = pos ? STOP : CANCEL;
3389 break;
3391 case KEY_BACKSPACE:
3392 if (pos > 0)
3393 pos--;
3394 else
3395 status = CANCEL;
3396 break;
3398 case KEY_ESC:
3399 status = CANCEL;
3400 break;
3402 case ERR:
3403 break;
3405 default:
3406 if (pos >= sizeof(buf)) {
3407 report("Input string too long");
3408 return NULL;
3409 }
3411 if (isprint(key))
3412 buf[pos++] = (char) key;
3413 }
3414 }
3416 if (status == CANCEL) {
3417 /* Clear the status window */
3418 report("");
3419 return NULL;
3420 }
3422 buf[pos++] = 0;
3424 return buf;
3425 }
3427 /*
3428 * Repository references
3429 */
3431 static struct ref *refs;
3432 static size_t refs_size;
3434 /* Id <-> ref store */
3435 static struct ref ***id_refs;
3436 static size_t id_refs_size;
3438 static struct ref **
3439 get_refs(char *id)
3440 {
3441 struct ref ***tmp_id_refs;
3442 struct ref **ref_list = NULL;
3443 size_t ref_list_size = 0;
3444 size_t i;
3446 for (i = 0; i < id_refs_size; i++)
3447 if (!strcmp(id, id_refs[i][0]->id))
3448 return id_refs[i];
3450 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3451 if (!tmp_id_refs)
3452 return NULL;
3454 id_refs = tmp_id_refs;
3456 for (i = 0; i < refs_size; i++) {
3457 struct ref **tmp;
3459 if (strcmp(id, refs[i].id))
3460 continue;
3462 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3463 if (!tmp) {
3464 if (ref_list)
3465 free(ref_list);
3466 return NULL;
3467 }
3469 ref_list = tmp;
3470 if (ref_list_size > 0)
3471 ref_list[ref_list_size - 1]->next = 1;
3472 ref_list[ref_list_size] = &refs[i];
3474 /* XXX: The properties of the commit chains ensures that we can
3475 * safely modify the shared ref. The repo references will
3476 * always be similar for the same id. */
3477 ref_list[ref_list_size]->next = 0;
3478 ref_list_size++;
3479 }
3481 if (ref_list)
3482 id_refs[id_refs_size++] = ref_list;
3484 return ref_list;
3485 }
3487 static int
3488 read_ref(char *id, int idlen, char *name, int namelen)
3489 {
3490 struct ref *ref;
3491 bool tag = FALSE;
3493 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3494 /* Commits referenced by tags has "^{}" appended. */
3495 if (name[namelen - 1] != '}')
3496 return OK;
3498 while (namelen > 0 && name[namelen] != '^')
3499 namelen--;
3501 tag = TRUE;
3502 namelen -= STRING_SIZE("refs/tags/");
3503 name += STRING_SIZE("refs/tags/");
3505 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3506 namelen -= STRING_SIZE("refs/heads/");
3507 name += STRING_SIZE("refs/heads/");
3509 } else if (!strcmp(name, "HEAD")) {
3510 return OK;
3511 }
3513 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3514 if (!refs)
3515 return ERR;
3517 ref = &refs[refs_size++];
3518 ref->name = malloc(namelen + 1);
3519 if (!ref->name)
3520 return ERR;
3522 strncpy(ref->name, name, namelen);
3523 ref->name[namelen] = 0;
3524 ref->tag = tag;
3525 string_copy(ref->id, id);
3527 return OK;
3528 }
3530 static int
3531 load_refs(void)
3532 {
3533 const char *cmd_env = getenv("TIG_LS_REMOTE");
3534 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3536 return read_properties(popen(cmd, "r"), "\t", read_ref);
3537 }
3539 static int
3540 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3541 {
3542 if (!strcmp(name, "i18n.commitencoding"))
3543 string_copy(opt_encoding, value);
3545 return OK;
3546 }
3548 static int
3549 load_repo_config(void)
3550 {
3551 return read_properties(popen("git repo-config --list", "r"),
3552 "=", read_repo_config_option);
3553 }
3555 static int
3556 read_properties(FILE *pipe, const char *separators,
3557 int (*read_property)(char *, int, char *, int))
3558 {
3559 char buffer[BUFSIZ];
3560 char *name;
3561 int state = OK;
3563 if (!pipe)
3564 return ERR;
3566 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3567 char *value;
3568 size_t namelen;
3569 size_t valuelen;
3571 name = chomp_string(name);
3572 namelen = strcspn(name, separators);
3574 if (name[namelen]) {
3575 name[namelen] = 0;
3576 value = chomp_string(name + namelen + 1);
3577 valuelen = strlen(value);
3579 } else {
3580 value = "";
3581 valuelen = 0;
3582 }
3584 state = read_property(name, namelen, value, valuelen);
3585 }
3587 if (state != ERR && ferror(pipe))
3588 state = ERR;
3590 pclose(pipe);
3592 return state;
3593 }
3596 /*
3597 * Main
3598 */
3600 static void __NORETURN
3601 quit(int sig)
3602 {
3603 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3604 if (cursed)
3605 endwin();
3606 exit(0);
3607 }
3609 static void __NORETURN
3610 die(const char *err, ...)
3611 {
3612 va_list args;
3614 endwin();
3616 va_start(args, err);
3617 fputs("tig: ", stderr);
3618 vfprintf(stderr, err, args);
3619 fputs("\n", stderr);
3620 va_end(args);
3622 exit(1);
3623 }
3625 int
3626 main(int argc, char *argv[])
3627 {
3628 struct view *view;
3629 enum request request;
3630 size_t i;
3632 signal(SIGINT, quit);
3634 if (setlocale(LC_ALL, "")) {
3635 string_copy(opt_codeset, nl_langinfo(CODESET));
3636 }
3638 if (load_options() == ERR)
3639 die("Failed to load user config.");
3641 /* Load the repo config file so options can be overwritten from
3642 * the command line. */
3643 if (load_repo_config() == ERR)
3644 die("Failed to load repo config.");
3646 if (!parse_options(argc, argv))
3647 return 0;
3649 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3650 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3651 if (opt_iconv == ICONV_NONE)
3652 die("Failed to initialize character set conversion");
3653 }
3655 if (load_refs() == ERR)
3656 die("Failed to load refs.");
3658 /* Require a git repository unless when running in pager mode. */
3659 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3660 die("Not a git repository");
3662 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3663 view->cmd_env = getenv(view->cmd_env);
3665 request = opt_request;
3667 init_display();
3669 while (view_driver(display[current_view], request)) {
3670 int key;
3671 int i;
3673 foreach_view (view, i)
3674 update_view(view);
3676 /* Refresh, accept single keystroke of input */
3677 key = wgetch(status_win);
3679 request = get_keybinding(display[current_view]->keymap, key);
3681 /* Some low-level request handling. This keeps access to
3682 * status_win restricted. */
3683 switch (request) {
3684 case REQ_PROMPT:
3685 {
3686 char *cmd = read_prompt(":");
3688 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3689 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3690 opt_request = REQ_VIEW_DIFF;
3691 } else {
3692 opt_request = REQ_VIEW_PAGER;
3693 }
3694 break;
3695 }
3697 request = REQ_NONE;
3698 break;
3699 }
3700 case REQ_SEARCH:
3701 case REQ_SEARCH_BACK:
3702 {
3703 const char *prompt = request == REQ_SEARCH
3704 ? "/" : "?";
3705 char *search = read_prompt(prompt);
3707 if (search)
3708 string_copy(opt_search, search);
3709 else
3710 request = REQ_NONE;
3711 break;
3712 }
3713 case REQ_SCREEN_RESIZE:
3714 {
3715 int height, width;
3717 getmaxyx(stdscr, height, width);
3719 /* Resize the status view and let the view driver take
3720 * care of resizing the displayed views. */
3721 wresize(status_win, 1, width);
3722 mvwin(status_win, height - 1, 0);
3723 wrefresh(status_win);
3724 break;
3725 }
3726 default:
3727 break;
3728 }
3729 }
3731 quit(0);
3733 return 0;
3734 }