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1 /* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
14 #ifndef VERSION
15 #define VERSION "tig-0.4.git"
16 #endif
18 #ifndef DEBUG
19 #define NDEBUG
20 #endif
22 #include <assert.h>
23 #include <errno.h>
24 #include <ctype.h>
25 #include <signal.h>
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <time.h>
33 #include <sys/types.h>
34 #include <regex.h>
36 #include <locale.h>
37 #include <langinfo.h>
38 #include <iconv.h>
40 #include <curses.h>
42 #if __GNUC__ >= 3
43 #define __NORETURN __attribute__((__noreturn__))
44 #else
45 #define __NORETURN
46 #endif
48 static void __NORETURN die(const char *err, ...);
49 static void report(const char *msg, ...);
50 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
51 static void set_nonblocking_input(bool loading);
52 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
54 #define ABS(x) ((x) >= 0 ? (x) : -(x))
55 #define MIN(x, y) ((x) < (y) ? (x) : (y))
57 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
58 #define STRING_SIZE(x) (sizeof(x) - 1)
60 #define SIZEOF_STR 1024 /* Default string size. */
61 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
62 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
63 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
65 /* Size of rev graph with no "padding" columns */
66 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
68 /* This color name can be used to refer to the default term colors. */
69 #define COLOR_DEFAULT (-1)
71 #define ICONV_NONE ((iconv_t) -1)
73 /* The format and size of the date column in the main view. */
74 #define DATE_FORMAT "%Y-%m-%d %H:%M"
75 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
77 #define AUTHOR_COLS 20
79 /* The default interval between line numbers. */
80 #define NUMBER_INTERVAL 1
82 #define TABSIZE 8
84 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
86 #define TIG_LS_REMOTE \
87 "git ls-remote . 2>/dev/null"
89 #define TIG_DIFF_CMD \
90 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
92 #define TIG_LOG_CMD \
93 "git log --cc --stat -n100 %s 2>/dev/null"
95 #define TIG_MAIN_CMD \
96 "git log --topo-order --pretty=raw %s 2>/dev/null"
98 #define TIG_TREE_CMD \
99 "git ls-tree %s %s"
101 #define TIG_BLOB_CMD \
102 "git cat-file blob %s"
104 /* XXX: Needs to be defined to the empty string. */
105 #define TIG_HELP_CMD ""
106 #define TIG_PAGER_CMD ""
108 /* Some ascii-shorthands fitted into the ncurses namespace. */
109 #define KEY_TAB '\t'
110 #define KEY_RETURN '\r'
111 #define KEY_ESC 27
114 struct ref {
115 char *name; /* Ref name; tag or head names are shortened. */
116 char id[SIZEOF_REV]; /* Commit SHA1 ID */
117 unsigned int tag:1; /* Is it a tag? */
118 unsigned int next:1; /* For ref lists: are there more refs? */
119 };
121 static struct ref **get_refs(char *id);
123 struct int_map {
124 const char *name;
125 int namelen;
126 int value;
127 };
129 static int
130 set_from_int_map(struct int_map *map, size_t map_size,
131 int *value, const char *name, int namelen)
132 {
134 int i;
136 for (i = 0; i < map_size; i++)
137 if (namelen == map[i].namelen &&
138 !strncasecmp(name, map[i].name, namelen)) {
139 *value = map[i].value;
140 return OK;
141 }
143 return ERR;
144 }
147 /*
148 * String helpers
149 */
151 static inline void
152 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
153 {
154 if (srclen > dstlen - 1)
155 srclen = dstlen - 1;
157 strncpy(dst, src, srclen);
158 dst[srclen] = 0;
159 }
161 /* Shorthands for safely copying into a fixed buffer. */
163 #define string_copy(dst, src) \
164 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
166 #define string_ncopy(dst, src, srclen) \
167 string_ncopy_do(dst, sizeof(dst), src, srclen)
169 static char *
170 chomp_string(char *name)
171 {
172 int namelen;
174 while (isspace(*name))
175 name++;
177 namelen = strlen(name) - 1;
178 while (namelen > 0 && isspace(name[namelen]))
179 name[namelen--] = 0;
181 return name;
182 }
184 static bool
185 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
186 {
187 va_list args;
188 size_t pos = bufpos ? *bufpos : 0;
190 va_start(args, fmt);
191 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
192 va_end(args);
194 if (bufpos)
195 *bufpos = pos;
197 return pos >= bufsize ? FALSE : TRUE;
198 }
200 #define string_format(buf, fmt, args...) \
201 string_nformat(buf, sizeof(buf), NULL, fmt, args)
203 #define string_format_from(buf, from, fmt, args...) \
204 string_nformat(buf, sizeof(buf), from, fmt, args)
206 static int
207 string_enum_compare(const char *str1, const char *str2, int len)
208 {
209 size_t i;
211 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
213 /* Diff-Header == DIFF_HEADER */
214 for (i = 0; i < len; i++) {
215 if (toupper(str1[i]) == toupper(str2[i]))
216 continue;
218 if (string_enum_sep(str1[i]) &&
219 string_enum_sep(str2[i]))
220 continue;
222 return str1[i] - str2[i];
223 }
225 return 0;
226 }
228 /* Shell quoting
229 *
230 * NOTE: The following is a slightly modified copy of the git project's shell
231 * quoting routines found in the quote.c file.
232 *
233 * Help to copy the thing properly quoted for the shell safety. any single
234 * quote is replaced with '\'', any exclamation point is replaced with '\!',
235 * and the whole thing is enclosed in a
236 *
237 * E.g.
238 * original sq_quote result
239 * name ==> name ==> 'name'
240 * a b ==> a b ==> 'a b'
241 * a'b ==> a'\''b ==> 'a'\''b'
242 * a!b ==> a'\!'b ==> 'a'\!'b'
243 */
245 static size_t
246 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
247 {
248 char c;
250 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
252 BUFPUT('\'');
253 while ((c = *src++)) {
254 if (c == '\'' || c == '!') {
255 BUFPUT('\'');
256 BUFPUT('\\');
257 BUFPUT(c);
258 BUFPUT('\'');
259 } else {
260 BUFPUT(c);
261 }
262 }
263 BUFPUT('\'');
265 return bufsize;
266 }
269 /*
270 * User requests
271 */
273 #define REQ_INFO \
274 /* XXX: Keep the view request first and in sync with views[]. */ \
275 REQ_GROUP("View switching") \
276 REQ_(VIEW_MAIN, "Show main view"), \
277 REQ_(VIEW_DIFF, "Show diff view"), \
278 REQ_(VIEW_LOG, "Show log view"), \
279 REQ_(VIEW_TREE, "Show tree view"), \
280 REQ_(VIEW_BLOB, "Show blob view"), \
281 REQ_(VIEW_HELP, "Show help page"), \
282 REQ_(VIEW_PAGER, "Show pager view"), \
283 \
284 REQ_GROUP("View manipulation") \
285 REQ_(ENTER, "Enter current line and scroll"), \
286 REQ_(NEXT, "Move to next"), \
287 REQ_(PREVIOUS, "Move to previous"), \
288 REQ_(VIEW_NEXT, "Move focus to next view"), \
289 REQ_(VIEW_CLOSE, "Close the current view"), \
290 REQ_(QUIT, "Close all views and quit"), \
291 \
292 REQ_GROUP("Cursor navigation") \
293 REQ_(MOVE_UP, "Move cursor one line up"), \
294 REQ_(MOVE_DOWN, "Move cursor one line down"), \
295 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
296 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
297 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
298 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
299 \
300 REQ_GROUP("Scrolling") \
301 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
302 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
303 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
304 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
305 \
306 REQ_GROUP("Searching") \
307 REQ_(SEARCH, "Search the view"), \
308 REQ_(SEARCH_BACK, "Search backwards in the view"), \
309 REQ_(FIND_NEXT, "Find next search match"), \
310 REQ_(FIND_PREV, "Find previous search match"), \
311 \
312 REQ_GROUP("Misc") \
313 REQ_(NONE, "Do nothing"), \
314 REQ_(PROMPT, "Bring up the prompt"), \
315 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
316 REQ_(SCREEN_RESIZE, "Resize the screen"), \
317 REQ_(SHOW_VERSION, "Show version information"), \
318 REQ_(STOP_LOADING, "Stop all loading views"), \
319 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
320 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
323 /* User action requests. */
324 enum request {
325 #define REQ_GROUP(help)
326 #define REQ_(req, help) REQ_##req
328 /* Offset all requests to avoid conflicts with ncurses getch values. */
329 REQ_OFFSET = KEY_MAX + 1,
330 REQ_INFO,
331 REQ_UNKNOWN,
333 #undef REQ_GROUP
334 #undef REQ_
335 };
337 struct request_info {
338 enum request request;
339 char *name;
340 int namelen;
341 char *help;
342 };
344 static struct request_info req_info[] = {
345 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
346 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
347 REQ_INFO
348 #undef REQ_GROUP
349 #undef REQ_
350 };
352 static enum request
353 get_request(const char *name)
354 {
355 int namelen = strlen(name);
356 int i;
358 for (i = 0; i < ARRAY_SIZE(req_info); i++)
359 if (req_info[i].namelen == namelen &&
360 !string_enum_compare(req_info[i].name, name, namelen))
361 return req_info[i].request;
363 return REQ_UNKNOWN;
364 }
367 /*
368 * Options
369 */
371 static const char usage[] =
372 VERSION " (" __DATE__ ")\n"
373 "\n"
374 "Usage: tig [options]\n"
375 " or: tig [options] [--] [git log options]\n"
376 " or: tig [options] log [git log options]\n"
377 " or: tig [options] diff [git diff options]\n"
378 " or: tig [options] show [git show options]\n"
379 " or: tig [options] < [git command output]\n"
380 "\n"
381 "Options:\n"
382 " -l Start up in log view\n"
383 " -d Start up in diff view\n"
384 " -n[I], --line-number[=I] Show line numbers with given interval\n"
385 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
386 " -- Mark end of tig options\n"
387 " -v, --version Show version and exit\n"
388 " -h, --help Show help message and exit\n";
390 /* Option and state variables. */
391 static bool opt_line_number = FALSE;
392 static bool opt_rev_graph = TRUE;
393 static int opt_num_interval = NUMBER_INTERVAL;
394 static int opt_tab_size = TABSIZE;
395 static enum request opt_request = REQ_VIEW_MAIN;
396 static char opt_cmd[SIZEOF_STR] = "";
397 static char opt_path[SIZEOF_STR] = "";
398 static FILE *opt_pipe = NULL;
399 static char opt_encoding[20] = "UTF-8";
400 static bool opt_utf8 = TRUE;
401 static char opt_codeset[20] = "UTF-8";
402 static iconv_t opt_iconv = ICONV_NONE;
403 static char opt_search[SIZEOF_STR] = "";
405 enum option_type {
406 OPT_NONE,
407 OPT_INT,
408 };
410 static bool
411 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
412 {
413 va_list args;
414 char *value = "";
415 int *number;
417 if (opt[0] != '-')
418 return FALSE;
420 if (opt[1] == '-') {
421 int namelen = strlen(name);
423 opt += 2;
425 if (strncmp(opt, name, namelen))
426 return FALSE;
428 if (opt[namelen] == '=')
429 value = opt + namelen + 1;
431 } else {
432 if (!short_name || opt[1] != short_name)
433 return FALSE;
434 value = opt + 2;
435 }
437 va_start(args, type);
438 if (type == OPT_INT) {
439 number = va_arg(args, int *);
440 if (isdigit(*value))
441 *number = atoi(value);
442 }
443 va_end(args);
445 return TRUE;
446 }
448 /* Returns the index of log or diff command or -1 to exit. */
449 static bool
450 parse_options(int argc, char *argv[])
451 {
452 int i;
454 for (i = 1; i < argc; i++) {
455 char *opt = argv[i];
457 if (!strcmp(opt, "-l")) {
458 opt_request = REQ_VIEW_LOG;
459 continue;
460 }
462 if (!strcmp(opt, "-d")) {
463 opt_request = REQ_VIEW_DIFF;
464 continue;
465 }
467 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
468 opt_line_number = TRUE;
469 continue;
470 }
472 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
473 opt_tab_size = MIN(opt_tab_size, TABSIZE);
474 continue;
475 }
477 if (check_option(opt, 'v', "version", OPT_NONE)) {
478 printf("tig version %s\n", VERSION);
479 return FALSE;
480 }
482 if (check_option(opt, 'h', "help", OPT_NONE)) {
483 printf(usage);
484 return FALSE;
485 }
487 if (!strcmp(opt, "--")) {
488 i++;
489 break;
490 }
492 if (!strcmp(opt, "log") ||
493 !strcmp(opt, "diff") ||
494 !strcmp(opt, "show")) {
495 opt_request = opt[0] == 'l'
496 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
497 break;
498 }
500 if (opt[0] && opt[0] != '-')
501 break;
503 die("unknown option '%s'\n\n%s", opt, usage);
504 }
506 if (!isatty(STDIN_FILENO)) {
507 opt_request = REQ_VIEW_PAGER;
508 opt_pipe = stdin;
510 } else if (i < argc) {
511 size_t buf_size;
513 if (opt_request == REQ_VIEW_MAIN)
514 /* XXX: This is vulnerable to the user overriding
515 * options required for the main view parser. */
516 string_copy(opt_cmd, "git log --stat --pretty=raw");
517 else
518 string_copy(opt_cmd, "git");
519 buf_size = strlen(opt_cmd);
521 while (buf_size < sizeof(opt_cmd) && i < argc) {
522 opt_cmd[buf_size++] = ' ';
523 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
524 }
526 if (buf_size >= sizeof(opt_cmd))
527 die("command too long");
529 opt_cmd[buf_size] = 0;
531 }
533 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
534 opt_utf8 = FALSE;
536 return TRUE;
537 }
540 /*
541 * Line-oriented content detection.
542 */
544 #define LINE_INFO \
545 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
546 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
547 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
548 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
549 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
550 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
551 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
552 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
553 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
554 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
555 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
556 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
557 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
558 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
559 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
560 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
561 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
562 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
563 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
564 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
565 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
566 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
567 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
568 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
569 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
570 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
571 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
572 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
573 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
574 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
575 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
576 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
577 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
578 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
579 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
580 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
581 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
582 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
583 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
584 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
585 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
587 enum line_type {
588 #define LINE(type, line, fg, bg, attr) \
589 LINE_##type
590 LINE_INFO
591 #undef LINE
592 };
594 struct line_info {
595 const char *name; /* Option name. */
596 int namelen; /* Size of option name. */
597 const char *line; /* The start of line to match. */
598 int linelen; /* Size of string to match. */
599 int fg, bg, attr; /* Color and text attributes for the lines. */
600 };
602 static struct line_info line_info[] = {
603 #define LINE(type, line, fg, bg, attr) \
604 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
605 LINE_INFO
606 #undef LINE
607 };
609 static enum line_type
610 get_line_type(char *line)
611 {
612 int linelen = strlen(line);
613 enum line_type type;
615 for (type = 0; type < ARRAY_SIZE(line_info); type++)
616 /* Case insensitive search matches Signed-off-by lines better. */
617 if (linelen >= line_info[type].linelen &&
618 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
619 return type;
621 return LINE_DEFAULT;
622 }
624 static inline int
625 get_line_attr(enum line_type type)
626 {
627 assert(type < ARRAY_SIZE(line_info));
628 return COLOR_PAIR(type) | line_info[type].attr;
629 }
631 static struct line_info *
632 get_line_info(char *name, int namelen)
633 {
634 enum line_type type;
636 for (type = 0; type < ARRAY_SIZE(line_info); type++)
637 if (namelen == line_info[type].namelen &&
638 !string_enum_compare(line_info[type].name, name, namelen))
639 return &line_info[type];
641 return NULL;
642 }
644 static void
645 init_colors(void)
646 {
647 int default_bg = COLOR_BLACK;
648 int default_fg = COLOR_WHITE;
649 enum line_type type;
651 start_color();
653 if (use_default_colors() != ERR) {
654 default_bg = -1;
655 default_fg = -1;
656 }
658 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
659 struct line_info *info = &line_info[type];
660 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
661 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
663 init_pair(type, fg, bg);
664 }
665 }
667 struct line {
668 enum line_type type;
670 /* State flags */
671 unsigned int selected:1;
673 void *data; /* User data */
674 };
677 /*
678 * Keys
679 */
681 struct keybinding {
682 int alias;
683 enum request request;
684 struct keybinding *next;
685 };
687 static struct keybinding default_keybindings[] = {
688 /* View switching */
689 { 'm', REQ_VIEW_MAIN },
690 { 'd', REQ_VIEW_DIFF },
691 { 'l', REQ_VIEW_LOG },
692 { 't', REQ_VIEW_TREE },
693 { 'f', REQ_VIEW_BLOB },
694 { 'p', REQ_VIEW_PAGER },
695 { 'h', REQ_VIEW_HELP },
697 /* View manipulation */
698 { 'q', REQ_VIEW_CLOSE },
699 { KEY_TAB, REQ_VIEW_NEXT },
700 { KEY_RETURN, REQ_ENTER },
701 { KEY_UP, REQ_PREVIOUS },
702 { KEY_DOWN, REQ_NEXT },
704 /* Cursor navigation */
705 { 'k', REQ_MOVE_UP },
706 { 'j', REQ_MOVE_DOWN },
707 { KEY_HOME, REQ_MOVE_FIRST_LINE },
708 { KEY_END, REQ_MOVE_LAST_LINE },
709 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
710 { ' ', REQ_MOVE_PAGE_DOWN },
711 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
712 { 'b', REQ_MOVE_PAGE_UP },
713 { '-', REQ_MOVE_PAGE_UP },
715 /* Scrolling */
716 { KEY_IC, REQ_SCROLL_LINE_UP },
717 { KEY_DC, REQ_SCROLL_LINE_DOWN },
718 { 'w', REQ_SCROLL_PAGE_UP },
719 { 's', REQ_SCROLL_PAGE_DOWN },
721 /* Searching */
722 { '/', REQ_SEARCH },
723 { '?', REQ_SEARCH_BACK },
724 { 'n', REQ_FIND_NEXT },
725 { 'N', REQ_FIND_PREV },
727 /* Misc */
728 { 'Q', REQ_QUIT },
729 { 'z', REQ_STOP_LOADING },
730 { 'v', REQ_SHOW_VERSION },
731 { 'r', REQ_SCREEN_REDRAW },
732 { '.', REQ_TOGGLE_LINENO },
733 { 'g', REQ_TOGGLE_REV_GRAPH },
734 { ':', REQ_PROMPT },
736 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
737 { ERR, REQ_NONE },
739 /* Using the ncurses SIGWINCH handler. */
740 { KEY_RESIZE, REQ_SCREEN_RESIZE },
741 };
743 #define KEYMAP_INFO \
744 KEYMAP_(GENERIC), \
745 KEYMAP_(MAIN), \
746 KEYMAP_(DIFF), \
747 KEYMAP_(LOG), \
748 KEYMAP_(TREE), \
749 KEYMAP_(BLOB), \
750 KEYMAP_(PAGER), \
751 KEYMAP_(HELP) \
753 enum keymap {
754 #define KEYMAP_(name) KEYMAP_##name
755 KEYMAP_INFO
756 #undef KEYMAP_
757 };
759 static struct int_map keymap_table[] = {
760 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
761 KEYMAP_INFO
762 #undef KEYMAP_
763 };
765 #define set_keymap(map, name) \
766 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
768 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
770 static void
771 add_keybinding(enum keymap keymap, enum request request, int key)
772 {
773 struct keybinding *keybinding;
775 keybinding = calloc(1, sizeof(*keybinding));
776 if (!keybinding)
777 die("Failed to allocate keybinding");
779 keybinding->alias = key;
780 keybinding->request = request;
781 keybinding->next = keybindings[keymap];
782 keybindings[keymap] = keybinding;
783 }
785 /* Looks for a key binding first in the given map, then in the generic map, and
786 * lastly in the default keybindings. */
787 static enum request
788 get_keybinding(enum keymap keymap, int key)
789 {
790 struct keybinding *kbd;
791 int i;
793 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
794 if (kbd->alias == key)
795 return kbd->request;
797 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
798 if (kbd->alias == key)
799 return kbd->request;
801 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
802 if (default_keybindings[i].alias == key)
803 return default_keybindings[i].request;
805 return (enum request) key;
806 }
809 struct key {
810 char *name;
811 int value;
812 };
814 static struct key key_table[] = {
815 { "Enter", KEY_RETURN },
816 { "Space", ' ' },
817 { "Backspace", KEY_BACKSPACE },
818 { "Tab", KEY_TAB },
819 { "Escape", KEY_ESC },
820 { "Left", KEY_LEFT },
821 { "Right", KEY_RIGHT },
822 { "Up", KEY_UP },
823 { "Down", KEY_DOWN },
824 { "Insert", KEY_IC },
825 { "Delete", KEY_DC },
826 { "Hash", '#' },
827 { "Home", KEY_HOME },
828 { "End", KEY_END },
829 { "PageUp", KEY_PPAGE },
830 { "PageDown", KEY_NPAGE },
831 { "F1", KEY_F(1) },
832 { "F2", KEY_F(2) },
833 { "F3", KEY_F(3) },
834 { "F4", KEY_F(4) },
835 { "F5", KEY_F(5) },
836 { "F6", KEY_F(6) },
837 { "F7", KEY_F(7) },
838 { "F8", KEY_F(8) },
839 { "F9", KEY_F(9) },
840 { "F10", KEY_F(10) },
841 { "F11", KEY_F(11) },
842 { "F12", KEY_F(12) },
843 };
845 static int
846 get_key_value(const char *name)
847 {
848 int i;
850 for (i = 0; i < ARRAY_SIZE(key_table); i++)
851 if (!strcasecmp(key_table[i].name, name))
852 return key_table[i].value;
854 if (strlen(name) == 1 && isprint(*name))
855 return (int) *name;
857 return ERR;
858 }
860 static char *
861 get_key(enum request request)
862 {
863 static char buf[BUFSIZ];
864 static char key_char[] = "'X'";
865 size_t pos = 0;
866 char *sep = " ";
867 int i;
869 buf[pos] = 0;
871 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
872 struct keybinding *keybinding = &default_keybindings[i];
873 char *seq = NULL;
874 int key;
876 if (keybinding->request != request)
877 continue;
879 for (key = 0; key < ARRAY_SIZE(key_table); key++)
880 if (key_table[key].value == keybinding->alias)
881 seq = key_table[key].name;
883 if (seq == NULL &&
884 keybinding->alias < 127 &&
885 isprint(keybinding->alias)) {
886 key_char[1] = (char) keybinding->alias;
887 seq = key_char;
888 }
890 if (!seq)
891 seq = "'?'";
893 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
894 return "Too many keybindings!";
895 sep = ", ";
896 }
898 return buf;
899 }
902 /*
903 * User config file handling.
904 */
906 static struct int_map color_map[] = {
907 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
908 COLOR_MAP(DEFAULT),
909 COLOR_MAP(BLACK),
910 COLOR_MAP(BLUE),
911 COLOR_MAP(CYAN),
912 COLOR_MAP(GREEN),
913 COLOR_MAP(MAGENTA),
914 COLOR_MAP(RED),
915 COLOR_MAP(WHITE),
916 COLOR_MAP(YELLOW),
917 };
919 #define set_color(color, name) \
920 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
922 static struct int_map attr_map[] = {
923 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
924 ATTR_MAP(NORMAL),
925 ATTR_MAP(BLINK),
926 ATTR_MAP(BOLD),
927 ATTR_MAP(DIM),
928 ATTR_MAP(REVERSE),
929 ATTR_MAP(STANDOUT),
930 ATTR_MAP(UNDERLINE),
931 };
933 #define set_attribute(attr, name) \
934 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
936 static int config_lineno;
937 static bool config_errors;
938 static char *config_msg;
940 /* Wants: object fgcolor bgcolor [attr] */
941 static int
942 option_color_command(int argc, char *argv[])
943 {
944 struct line_info *info;
946 if (argc != 3 && argc != 4) {
947 config_msg = "Wrong number of arguments given to color command";
948 return ERR;
949 }
951 info = get_line_info(argv[0], strlen(argv[0]));
952 if (!info) {
953 config_msg = "Unknown color name";
954 return ERR;
955 }
957 if (set_color(&info->fg, argv[1]) == ERR ||
958 set_color(&info->bg, argv[2]) == ERR) {
959 config_msg = "Unknown color";
960 return ERR;
961 }
963 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
964 config_msg = "Unknown attribute";
965 return ERR;
966 }
968 return OK;
969 }
971 /* Wants: name = value */
972 static int
973 option_set_command(int argc, char *argv[])
974 {
975 if (argc != 3) {
976 config_msg = "Wrong number of arguments given to set command";
977 return ERR;
978 }
980 if (strcmp(argv[1], "=")) {
981 config_msg = "No value assigned";
982 return ERR;
983 }
985 if (!strcmp(argv[0], "show-rev-graph")) {
986 opt_rev_graph = (!strcmp(argv[2], "1") ||
987 !strcmp(argv[2], "true") ||
988 !strcmp(argv[2], "yes"));
989 return OK;
990 }
992 if (!strcmp(argv[0], "line-number-interval")) {
993 opt_num_interval = atoi(argv[2]);
994 return OK;
995 }
997 if (!strcmp(argv[0], "tab-size")) {
998 opt_tab_size = atoi(argv[2]);
999 return OK;
1000 }
1002 if (!strcmp(argv[0], "commit-encoding")) {
1003 char *arg = argv[2];
1004 int delimiter = *arg;
1005 int i;
1007 switch (delimiter) {
1008 case '"':
1009 case '\'':
1010 for (arg++, i = 0; arg[i]; i++)
1011 if (arg[i] == delimiter) {
1012 arg[i] = 0;
1013 break;
1014 }
1015 default:
1016 string_copy(opt_encoding, arg);
1017 return OK;
1018 }
1019 }
1021 config_msg = "Unknown variable name";
1022 return ERR;
1023 }
1025 /* Wants: mode request key */
1026 static int
1027 option_bind_command(int argc, char *argv[])
1028 {
1029 enum request request;
1030 int keymap;
1031 int key;
1033 if (argc != 3) {
1034 config_msg = "Wrong number of arguments given to bind command";
1035 return ERR;
1036 }
1038 if (set_keymap(&keymap, argv[0]) == ERR) {
1039 config_msg = "Unknown key map";
1040 return ERR;
1041 }
1043 key = get_key_value(argv[1]);
1044 if (key == ERR) {
1045 config_msg = "Unknown key";
1046 return ERR;
1047 }
1049 request = get_request(argv[2]);
1050 if (request == REQ_UNKNOWN) {
1051 config_msg = "Unknown request name";
1052 return ERR;
1053 }
1055 add_keybinding(keymap, request, key);
1057 return OK;
1058 }
1060 static int
1061 set_option(char *opt, char *value)
1062 {
1063 char *argv[16];
1064 int valuelen;
1065 int argc = 0;
1067 /* Tokenize */
1068 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1069 argv[argc++] = value;
1071 value += valuelen;
1072 if (!*value)
1073 break;
1075 *value++ = 0;
1076 while (isspace(*value))
1077 value++;
1078 }
1080 if (!strcmp(opt, "color"))
1081 return option_color_command(argc, argv);
1083 if (!strcmp(opt, "set"))
1084 return option_set_command(argc, argv);
1086 if (!strcmp(opt, "bind"))
1087 return option_bind_command(argc, argv);
1089 config_msg = "Unknown option command";
1090 return ERR;
1091 }
1093 static int
1094 read_option(char *opt, int optlen, char *value, int valuelen)
1095 {
1096 int status = OK;
1098 config_lineno++;
1099 config_msg = "Internal error";
1101 /* Check for comment markers, since read_properties() will
1102 * only ensure opt and value are split at first " \t". */
1103 optlen = strcspn(opt, "#");
1104 if (optlen == 0)
1105 return OK;
1107 if (opt[optlen] != 0) {
1108 config_msg = "No option value";
1109 status = ERR;
1111 } else {
1112 /* Look for comment endings in the value. */
1113 int len = strcspn(value, "#");
1115 if (len < valuelen) {
1116 valuelen = len;
1117 value[valuelen] = 0;
1118 }
1120 status = set_option(opt, value);
1121 }
1123 if (status == ERR) {
1124 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1125 config_lineno, optlen, opt, config_msg);
1126 config_errors = TRUE;
1127 }
1129 /* Always keep going if errors are encountered. */
1130 return OK;
1131 }
1133 static int
1134 load_options(void)
1135 {
1136 char *home = getenv("HOME");
1137 char buf[SIZEOF_STR];
1138 FILE *file;
1140 config_lineno = 0;
1141 config_errors = FALSE;
1143 if (!home || !string_format(buf, "%s/.tigrc", home))
1144 return ERR;
1146 /* It's ok that the file doesn't exist. */
1147 file = fopen(buf, "r");
1148 if (!file)
1149 return OK;
1151 if (read_properties(file, " \t", read_option) == ERR ||
1152 config_errors == TRUE)
1153 fprintf(stderr, "Errors while loading %s.\n", buf);
1155 return OK;
1156 }
1159 /*
1160 * The viewer
1161 */
1163 struct view;
1164 struct view_ops;
1166 /* The display array of active views and the index of the current view. */
1167 static struct view *display[2];
1168 static unsigned int current_view;
1170 #define foreach_displayed_view(view, i) \
1171 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1173 #define displayed_views() (display[1] != NULL ? 2 : 1)
1175 /* Current head and commit ID */
1176 static char ref_blob[SIZEOF_REF] = "";
1177 static char ref_commit[SIZEOF_REF] = "HEAD";
1178 static char ref_head[SIZEOF_REF] = "HEAD";
1180 struct view {
1181 const char *name; /* View name */
1182 const char *cmd_fmt; /* Default command line format */
1183 const char *cmd_env; /* Command line set via environment */
1184 const char *id; /* Points to either of ref_{head,commit,blob} */
1186 struct view_ops *ops; /* View operations */
1188 enum keymap keymap; /* What keymap does this view have */
1190 char cmd[SIZEOF_STR]; /* Command buffer */
1191 char ref[SIZEOF_REF]; /* Hovered commit reference */
1192 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1194 int height, width; /* The width and height of the main window */
1195 WINDOW *win; /* The main window */
1196 WINDOW *title; /* The title window living below the main window */
1198 /* Navigation */
1199 unsigned long offset; /* Offset of the window top */
1200 unsigned long lineno; /* Current line number */
1202 /* Searching */
1203 char grep[SIZEOF_STR]; /* Search string */
1204 regex_t *regex; /* Pre-compiled regex */
1206 /* If non-NULL, points to the view that opened this view. If this view
1207 * is closed tig will switch back to the parent view. */
1208 struct view *parent;
1210 /* Buffering */
1211 unsigned long lines; /* Total number of lines */
1212 struct line *line; /* Line index */
1213 unsigned long line_size;/* Total number of allocated lines */
1214 unsigned int digits; /* Number of digits in the lines member. */
1216 /* Loading */
1217 FILE *pipe;
1218 time_t start_time;
1219 };
1221 struct view_ops {
1222 /* What type of content being displayed. Used in the title bar. */
1223 const char *type;
1224 /* Draw one line; @lineno must be < view->height. */
1225 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1226 /* Read one line; updates view->line. */
1227 bool (*read)(struct view *view, char *data);
1228 /* Depending on view, change display based on current line. */
1229 bool (*enter)(struct view *view, struct line *line);
1230 /* Search for regex in a line. */
1231 bool (*grep)(struct view *view, struct line *line);
1232 /* Select line */
1233 void (*select)(struct view *view, struct line *line);
1234 };
1236 static struct view_ops pager_ops;
1237 static struct view_ops main_ops;
1238 static struct view_ops tree_ops;
1239 static struct view_ops blob_ops;
1241 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1242 { name, cmd, #env, ref, ops, map}
1244 #define VIEW_(id, name, ops, ref) \
1245 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1248 static struct view views[] = {
1249 VIEW_(MAIN, "main", &main_ops, ref_head),
1250 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1251 VIEW_(LOG, "log", &pager_ops, ref_head),
1252 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1253 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1254 VIEW_(HELP, "help", &pager_ops, "static"),
1255 VIEW_(PAGER, "pager", &pager_ops, "static"),
1256 };
1258 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1260 #define foreach_view(view, i) \
1261 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1263 #define view_is_displayed(view) \
1264 (view == display[0] || view == display[1])
1266 static bool
1267 draw_view_line(struct view *view, unsigned int lineno)
1268 {
1269 struct line *line;
1270 bool selected = (view->offset + lineno == view->lineno);
1272 assert(view_is_displayed(view));
1274 if (view->offset + lineno >= view->lines)
1275 return FALSE;
1277 line = &view->line[view->offset + lineno];
1279 if (selected) {
1280 line->selected = TRUE;
1281 view->ops->select(view, line);
1282 } else if (line->selected) {
1283 line->selected = FALSE;
1284 wmove(view->win, lineno, 0);
1285 wclrtoeol(view->win);
1286 }
1288 return view->ops->draw(view, line, lineno, selected);
1289 }
1291 static void
1292 redraw_view_from(struct view *view, int lineno)
1293 {
1294 assert(0 <= lineno && lineno < view->height);
1296 for (; lineno < view->height; lineno++) {
1297 if (!draw_view_line(view, lineno))
1298 break;
1299 }
1301 redrawwin(view->win);
1302 wrefresh(view->win);
1303 }
1305 static void
1306 redraw_view(struct view *view)
1307 {
1308 wclear(view->win);
1309 redraw_view_from(view, 0);
1310 }
1313 static void
1314 update_view_title(struct view *view)
1315 {
1316 assert(view_is_displayed(view));
1318 if (view == display[current_view])
1319 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1320 else
1321 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1323 werase(view->title);
1324 wmove(view->title, 0, 0);
1326 if (*view->ref)
1327 wprintw(view->title, "[%s] %s", view->name, view->ref);
1328 else
1329 wprintw(view->title, "[%s]", view->name);
1331 if (view->lines || view->pipe) {
1332 unsigned int view_lines = view->offset + view->height;
1333 unsigned int lines = view->lines
1334 ? MIN(view_lines, view->lines) * 100 / view->lines
1335 : 0;
1337 wprintw(view->title, " - %s %d of %d (%d%%)",
1338 view->ops->type,
1339 view->lineno + 1,
1340 view->lines,
1341 lines);
1342 }
1344 if (view->pipe) {
1345 time_t secs = time(NULL) - view->start_time;
1347 /* Three git seconds are a long time ... */
1348 if (secs > 2)
1349 wprintw(view->title, " %lds", secs);
1350 }
1352 wmove(view->title, 0, view->width - 1);
1353 wrefresh(view->title);
1354 }
1356 static void
1357 resize_display(void)
1358 {
1359 int offset, i;
1360 struct view *base = display[0];
1361 struct view *view = display[1] ? display[1] : display[0];
1363 /* Setup window dimensions */
1365 getmaxyx(stdscr, base->height, base->width);
1367 /* Make room for the status window. */
1368 base->height -= 1;
1370 if (view != base) {
1371 /* Horizontal split. */
1372 view->width = base->width;
1373 view->height = SCALE_SPLIT_VIEW(base->height);
1374 base->height -= view->height;
1376 /* Make room for the title bar. */
1377 view->height -= 1;
1378 }
1380 /* Make room for the title bar. */
1381 base->height -= 1;
1383 offset = 0;
1385 foreach_displayed_view (view, i) {
1386 if (!view->win) {
1387 view->win = newwin(view->height, 0, offset, 0);
1388 if (!view->win)
1389 die("Failed to create %s view", view->name);
1391 scrollok(view->win, TRUE);
1393 view->title = newwin(1, 0, offset + view->height, 0);
1394 if (!view->title)
1395 die("Failed to create title window");
1397 } else {
1398 wresize(view->win, view->height, view->width);
1399 mvwin(view->win, offset, 0);
1400 mvwin(view->title, offset + view->height, 0);
1401 }
1403 offset += view->height + 1;
1404 }
1405 }
1407 static void
1408 redraw_display(void)
1409 {
1410 struct view *view;
1411 int i;
1413 foreach_displayed_view (view, i) {
1414 redraw_view(view);
1415 update_view_title(view);
1416 }
1417 }
1419 static void
1420 update_display_cursor(void)
1421 {
1422 struct view *view = display[current_view];
1424 /* Move the cursor to the right-most column of the cursor line.
1425 *
1426 * XXX: This could turn out to be a bit expensive, but it ensures that
1427 * the cursor does not jump around. */
1428 if (view->lines) {
1429 wmove(view->win, view->lineno - view->offset, view->width - 1);
1430 wrefresh(view->win);
1431 }
1432 }
1434 /*
1435 * Navigation
1436 */
1438 /* Scrolling backend */
1439 static void
1440 do_scroll_view(struct view *view, int lines)
1441 {
1442 bool redraw_current_line = FALSE;
1444 /* The rendering expects the new offset. */
1445 view->offset += lines;
1447 assert(0 <= view->offset && view->offset < view->lines);
1448 assert(lines);
1450 /* Move current line into the view. */
1451 if (view->lineno < view->offset) {
1452 view->lineno = view->offset;
1453 redraw_current_line = TRUE;
1454 } else if (view->lineno >= view->offset + view->height) {
1455 view->lineno = view->offset + view->height - 1;
1456 redraw_current_line = TRUE;
1457 }
1459 assert(view->offset <= view->lineno && view->lineno < view->lines);
1461 /* Redraw the whole screen if scrolling is pointless. */
1462 if (view->height < ABS(lines)) {
1463 redraw_view(view);
1465 } else {
1466 int line = lines > 0 ? view->height - lines : 0;
1467 int end = line + ABS(lines);
1469 wscrl(view->win, lines);
1471 for (; line < end; line++) {
1472 if (!draw_view_line(view, line))
1473 break;
1474 }
1476 if (redraw_current_line)
1477 draw_view_line(view, view->lineno - view->offset);
1478 }
1480 redrawwin(view->win);
1481 wrefresh(view->win);
1482 report("");
1483 }
1485 /* Scroll frontend */
1486 static void
1487 scroll_view(struct view *view, enum request request)
1488 {
1489 int lines = 1;
1491 assert(view_is_displayed(view));
1493 switch (request) {
1494 case REQ_SCROLL_PAGE_DOWN:
1495 lines = view->height;
1496 case REQ_SCROLL_LINE_DOWN:
1497 if (view->offset + lines > view->lines)
1498 lines = view->lines - view->offset;
1500 if (lines == 0 || view->offset + view->height >= view->lines) {
1501 report("Cannot scroll beyond the last line");
1502 return;
1503 }
1504 break;
1506 case REQ_SCROLL_PAGE_UP:
1507 lines = view->height;
1508 case REQ_SCROLL_LINE_UP:
1509 if (lines > view->offset)
1510 lines = view->offset;
1512 if (lines == 0) {
1513 report("Cannot scroll beyond the first line");
1514 return;
1515 }
1517 lines = -lines;
1518 break;
1520 default:
1521 die("request %d not handled in switch", request);
1522 }
1524 do_scroll_view(view, lines);
1525 }
1527 /* Cursor moving */
1528 static void
1529 move_view(struct view *view, enum request request)
1530 {
1531 int scroll_steps = 0;
1532 int steps;
1534 switch (request) {
1535 case REQ_MOVE_FIRST_LINE:
1536 steps = -view->lineno;
1537 break;
1539 case REQ_MOVE_LAST_LINE:
1540 steps = view->lines - view->lineno - 1;
1541 break;
1543 case REQ_MOVE_PAGE_UP:
1544 steps = view->height > view->lineno
1545 ? -view->lineno : -view->height;
1546 break;
1548 case REQ_MOVE_PAGE_DOWN:
1549 steps = view->lineno + view->height >= view->lines
1550 ? view->lines - view->lineno - 1 : view->height;
1551 break;
1553 case REQ_MOVE_UP:
1554 steps = -1;
1555 break;
1557 case REQ_MOVE_DOWN:
1558 steps = 1;
1559 break;
1561 default:
1562 die("request %d not handled in switch", request);
1563 }
1565 if (steps <= 0 && view->lineno == 0) {
1566 report("Cannot move beyond the first line");
1567 return;
1569 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1570 report("Cannot move beyond the last line");
1571 return;
1572 }
1574 /* Move the current line */
1575 view->lineno += steps;
1576 assert(0 <= view->lineno && view->lineno < view->lines);
1578 /* Check whether the view needs to be scrolled */
1579 if (view->lineno < view->offset ||
1580 view->lineno >= view->offset + view->height) {
1581 scroll_steps = steps;
1582 if (steps < 0 && -steps > view->offset) {
1583 scroll_steps = -view->offset;
1585 } else if (steps > 0) {
1586 if (view->lineno == view->lines - 1 &&
1587 view->lines > view->height) {
1588 scroll_steps = view->lines - view->offset - 1;
1589 if (scroll_steps >= view->height)
1590 scroll_steps -= view->height - 1;
1591 }
1592 }
1593 }
1595 if (!view_is_displayed(view)) {
1596 view->offset += steps;
1597 view->ops->select(view, &view->line[view->lineno]);
1598 return;
1599 }
1601 /* Repaint the old "current" line if we be scrolling */
1602 if (ABS(steps) < view->height)
1603 draw_view_line(view, view->lineno - steps - view->offset);
1605 if (scroll_steps) {
1606 do_scroll_view(view, scroll_steps);
1607 return;
1608 }
1610 /* Draw the current line */
1611 draw_view_line(view, view->lineno - view->offset);
1613 redrawwin(view->win);
1614 wrefresh(view->win);
1615 report("");
1616 }
1619 /*
1620 * Searching
1621 */
1623 static void search_view(struct view *view, enum request request);
1625 static bool
1626 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1627 {
1628 assert(view_is_displayed(view));
1630 if (!view->ops->grep(view, line))
1631 return FALSE;
1633 if (lineno - view->offset >= view->height) {
1634 view->offset = lineno;
1635 view->lineno = lineno;
1636 redraw_view(view);
1638 } else {
1639 unsigned long old_lineno = view->lineno - view->offset;
1641 view->lineno = lineno;
1642 draw_view_line(view, old_lineno);
1644 draw_view_line(view, view->lineno - view->offset);
1645 redrawwin(view->win);
1646 wrefresh(view->win);
1647 }
1649 report("Line %ld matches '%s'", lineno + 1, view->grep);
1650 return TRUE;
1651 }
1653 static void
1654 find_next(struct view *view, enum request request)
1655 {
1656 unsigned long lineno = view->lineno;
1657 int direction;
1659 if (!*view->grep) {
1660 if (!*opt_search)
1661 report("No previous search");
1662 else
1663 search_view(view, request);
1664 return;
1665 }
1667 switch (request) {
1668 case REQ_SEARCH:
1669 case REQ_FIND_NEXT:
1670 direction = 1;
1671 break;
1673 case REQ_SEARCH_BACK:
1674 case REQ_FIND_PREV:
1675 direction = -1;
1676 break;
1678 default:
1679 return;
1680 }
1682 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1683 lineno += direction;
1685 /* Note, lineno is unsigned long so will wrap around in which case it
1686 * will become bigger than view->lines. */
1687 for (; lineno < view->lines; lineno += direction) {
1688 struct line *line = &view->line[lineno];
1690 if (find_next_line(view, lineno, line))
1691 return;
1692 }
1694 report("No match found for '%s'", view->grep);
1695 }
1697 static void
1698 search_view(struct view *view, enum request request)
1699 {
1700 int regex_err;
1702 if (view->regex) {
1703 regfree(view->regex);
1704 *view->grep = 0;
1705 } else {
1706 view->regex = calloc(1, sizeof(*view->regex));
1707 if (!view->regex)
1708 return;
1709 }
1711 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1712 if (regex_err != 0) {
1713 char buf[SIZEOF_STR] = "unknown error";
1715 regerror(regex_err, view->regex, buf, sizeof(buf));
1716 report("Search failed: %s", buf);
1717 return;
1718 }
1720 string_copy(view->grep, opt_search);
1722 find_next(view, request);
1723 }
1725 /*
1726 * Incremental updating
1727 */
1729 static void
1730 end_update(struct view *view)
1731 {
1732 if (!view->pipe)
1733 return;
1734 set_nonblocking_input(FALSE);
1735 if (view->pipe == stdin)
1736 fclose(view->pipe);
1737 else
1738 pclose(view->pipe);
1739 view->pipe = NULL;
1740 }
1742 static bool
1743 begin_update(struct view *view)
1744 {
1745 const char *id = view->id;
1747 if (view->pipe)
1748 end_update(view);
1750 if (opt_cmd[0]) {
1751 string_copy(view->cmd, opt_cmd);
1752 opt_cmd[0] = 0;
1753 /* When running random commands, the view ref could have become
1754 * invalid so clear it. */
1755 view->ref[0] = 0;
1757 } else if (view == VIEW(REQ_VIEW_TREE)) {
1758 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1760 if (strcmp(view->vid, view->id))
1761 opt_path[0] = 0;
1763 if (!string_format(view->cmd, format, id, opt_path))
1764 return FALSE;
1766 } else {
1767 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1769 if (!string_format(view->cmd, format, id, id, id, id, id))
1770 return FALSE;
1771 }
1773 /* Special case for the pager view. */
1774 if (opt_pipe) {
1775 view->pipe = opt_pipe;
1776 opt_pipe = NULL;
1777 } else {
1778 view->pipe = popen(view->cmd, "r");
1779 }
1781 if (!view->pipe)
1782 return FALSE;
1784 set_nonblocking_input(TRUE);
1786 view->offset = 0;
1787 view->lines = 0;
1788 view->lineno = 0;
1789 string_copy(view->vid, id);
1791 if (view->line) {
1792 int i;
1794 for (i = 0; i < view->lines; i++)
1795 if (view->line[i].data)
1796 free(view->line[i].data);
1798 free(view->line);
1799 view->line = NULL;
1800 }
1802 view->start_time = time(NULL);
1804 return TRUE;
1805 }
1807 static struct line *
1808 realloc_lines(struct view *view, size_t line_size)
1809 {
1810 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1812 if (!tmp)
1813 return NULL;
1815 view->line = tmp;
1816 view->line_size = line_size;
1817 return view->line;
1818 }
1820 static bool
1821 update_view(struct view *view)
1822 {
1823 char in_buffer[BUFSIZ];
1824 char out_buffer[BUFSIZ * 2];
1825 char *line;
1826 /* The number of lines to read. If too low it will cause too much
1827 * redrawing (and possible flickering), if too high responsiveness
1828 * will suffer. */
1829 unsigned long lines = view->height;
1830 int redraw_from = -1;
1832 if (!view->pipe)
1833 return TRUE;
1835 /* Only redraw if lines are visible. */
1836 if (view->offset + view->height >= view->lines)
1837 redraw_from = view->lines - view->offset;
1839 /* FIXME: This is probably not perfect for backgrounded views. */
1840 if (!realloc_lines(view, view->lines + lines))
1841 goto alloc_error;
1843 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1844 size_t linelen = strlen(line);
1846 if (linelen)
1847 line[linelen - 1] = 0;
1849 if (opt_iconv != ICONV_NONE) {
1850 char *inbuf = line;
1851 size_t inlen = linelen;
1853 char *outbuf = out_buffer;
1854 size_t outlen = sizeof(out_buffer);
1856 size_t ret;
1858 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1859 if (ret != (size_t) -1) {
1860 line = out_buffer;
1861 linelen = strlen(out_buffer);
1862 }
1863 }
1865 if (!view->ops->read(view, line))
1866 goto alloc_error;
1868 if (lines-- == 1)
1869 break;
1870 }
1872 {
1873 int digits;
1875 lines = view->lines;
1876 for (digits = 0; lines; digits++)
1877 lines /= 10;
1879 /* Keep the displayed view in sync with line number scaling. */
1880 if (digits != view->digits) {
1881 view->digits = digits;
1882 redraw_from = 0;
1883 }
1884 }
1886 if (!view_is_displayed(view))
1887 goto check_pipe;
1889 if (view == VIEW(REQ_VIEW_TREE)) {
1890 /* Clear the view and redraw everything since the tree sorting
1891 * might have rearranged things. */
1892 redraw_view(view);
1894 } else if (redraw_from >= 0) {
1895 /* If this is an incremental update, redraw the previous line
1896 * since for commits some members could have changed when
1897 * loading the main view. */
1898 if (redraw_from > 0)
1899 redraw_from--;
1901 /* Incrementally draw avoids flickering. */
1902 redraw_view_from(view, redraw_from);
1903 }
1905 /* Update the title _after_ the redraw so that if the redraw picks up a
1906 * commit reference in view->ref it'll be available here. */
1907 update_view_title(view);
1909 check_pipe:
1910 if (ferror(view->pipe)) {
1911 report("Failed to read: %s", strerror(errno));
1912 goto end;
1914 } else if (feof(view->pipe)) {
1915 report("");
1916 goto end;
1917 }
1919 return TRUE;
1921 alloc_error:
1922 report("Allocation failure");
1924 end:
1925 end_update(view);
1926 return FALSE;
1927 }
1930 /*
1931 * View opening
1932 */
1934 static void open_help_view(struct view *view)
1935 {
1936 char buf[BUFSIZ];
1937 int lines = ARRAY_SIZE(req_info) + 2;
1938 int i;
1940 if (view->lines > 0)
1941 return;
1943 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1944 if (!req_info[i].request)
1945 lines++;
1947 view->line = calloc(lines, sizeof(*view->line));
1948 if (!view->line) {
1949 report("Allocation failure");
1950 return;
1951 }
1953 view->ops->read(view, "Quick reference for tig keybindings:");
1955 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1956 char *key;
1958 if (!req_info[i].request) {
1959 view->ops->read(view, "");
1960 view->ops->read(view, req_info[i].help);
1961 continue;
1962 }
1964 key = get_key(req_info[i].request);
1965 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1966 continue;
1968 view->ops->read(view, buf);
1969 }
1970 }
1972 enum open_flags {
1973 OPEN_DEFAULT = 0, /* Use default view switching. */
1974 OPEN_SPLIT = 1, /* Split current view. */
1975 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1976 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1977 };
1979 static void
1980 open_view(struct view *prev, enum request request, enum open_flags flags)
1981 {
1982 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1983 bool split = !!(flags & OPEN_SPLIT);
1984 bool reload = !!(flags & OPEN_RELOAD);
1985 struct view *view = VIEW(request);
1986 int nviews = displayed_views();
1987 struct view *base_view = display[0];
1989 if (view == prev && nviews == 1 && !reload) {
1990 report("Already in %s view", view->name);
1991 return;
1992 }
1994 if (view == VIEW(REQ_VIEW_HELP)) {
1995 open_help_view(view);
1997 } else if ((reload || strcmp(view->vid, view->id)) &&
1998 !begin_update(view)) {
1999 report("Failed to load %s view", view->name);
2000 return;
2001 }
2003 if (split) {
2004 display[1] = view;
2005 if (!backgrounded)
2006 current_view = 1;
2007 } else {
2008 /* Maximize the current view. */
2009 memset(display, 0, sizeof(display));
2010 current_view = 0;
2011 display[current_view] = view;
2012 }
2014 /* Resize the view when switching between split- and full-screen,
2015 * or when switching between two different full-screen views. */
2016 if (nviews != displayed_views() ||
2017 (nviews == 1 && base_view != display[0]))
2018 resize_display();
2020 if (split && prev->lineno - prev->offset >= prev->height) {
2021 /* Take the title line into account. */
2022 int lines = prev->lineno - prev->offset - prev->height + 1;
2024 /* Scroll the view that was split if the current line is
2025 * outside the new limited view. */
2026 do_scroll_view(prev, lines);
2027 }
2029 if (prev && view != prev) {
2030 if (split && !backgrounded) {
2031 /* "Blur" the previous view. */
2032 update_view_title(prev);
2033 }
2035 view->parent = prev;
2036 }
2038 if (view->pipe && view->lines == 0) {
2039 /* Clear the old view and let the incremental updating refill
2040 * the screen. */
2041 wclear(view->win);
2042 report("");
2043 } else {
2044 redraw_view(view);
2045 report("");
2046 }
2048 /* If the view is backgrounded the above calls to report()
2049 * won't redraw the view title. */
2050 if (backgrounded)
2051 update_view_title(view);
2052 }
2055 /*
2056 * User request switch noodle
2057 */
2059 static int
2060 view_driver(struct view *view, enum request request)
2061 {
2062 int i;
2064 switch (request) {
2065 case REQ_MOVE_UP:
2066 case REQ_MOVE_DOWN:
2067 case REQ_MOVE_PAGE_UP:
2068 case REQ_MOVE_PAGE_DOWN:
2069 case REQ_MOVE_FIRST_LINE:
2070 case REQ_MOVE_LAST_LINE:
2071 move_view(view, request);
2072 break;
2074 case REQ_SCROLL_LINE_DOWN:
2075 case REQ_SCROLL_LINE_UP:
2076 case REQ_SCROLL_PAGE_DOWN:
2077 case REQ_SCROLL_PAGE_UP:
2078 scroll_view(view, request);
2079 break;
2081 case REQ_VIEW_BLOB:
2082 if (!ref_blob[0]) {
2083 report("No file chosen, press 't' to open tree view");
2084 break;
2085 }
2086 /* Fall-through */
2087 case REQ_VIEW_MAIN:
2088 case REQ_VIEW_DIFF:
2089 case REQ_VIEW_LOG:
2090 case REQ_VIEW_TREE:
2091 case REQ_VIEW_HELP:
2092 case REQ_VIEW_PAGER:
2093 open_view(view, request, OPEN_DEFAULT);
2094 break;
2096 case REQ_NEXT:
2097 case REQ_PREVIOUS:
2098 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2100 if ((view == VIEW(REQ_VIEW_DIFF) &&
2101 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2102 (view == VIEW(REQ_VIEW_BLOB) &&
2103 view->parent == VIEW(REQ_VIEW_TREE))) {
2104 view = view->parent;
2105 move_view(view, request);
2106 if (view_is_displayed(view))
2107 update_view_title(view);
2108 } else {
2109 move_view(view, request);
2110 break;
2111 }
2112 /* Fall-through */
2114 case REQ_ENTER:
2115 if (!view->lines) {
2116 report("Nothing to enter");
2117 break;
2118 }
2119 return view->ops->enter(view, &view->line[view->lineno]);
2121 case REQ_VIEW_NEXT:
2122 {
2123 int nviews = displayed_views();
2124 int next_view = (current_view + 1) % nviews;
2126 if (next_view == current_view) {
2127 report("Only one view is displayed");
2128 break;
2129 }
2131 current_view = next_view;
2132 /* Blur out the title of the previous view. */
2133 update_view_title(view);
2134 report("");
2135 break;
2136 }
2137 case REQ_TOGGLE_LINENO:
2138 opt_line_number = !opt_line_number;
2139 redraw_display();
2140 break;
2142 case REQ_TOGGLE_REV_GRAPH:
2143 opt_rev_graph = !opt_rev_graph;
2144 redraw_display();
2145 break;
2147 case REQ_PROMPT:
2148 /* Always reload^Wrerun commands from the prompt. */
2149 open_view(view, opt_request, OPEN_RELOAD);
2150 break;
2152 case REQ_SEARCH:
2153 case REQ_SEARCH_BACK:
2154 search_view(view, request);
2155 break;
2157 case REQ_FIND_NEXT:
2158 case REQ_FIND_PREV:
2159 find_next(view, request);
2160 break;
2162 case REQ_STOP_LOADING:
2163 for (i = 0; i < ARRAY_SIZE(views); i++) {
2164 view = &views[i];
2165 if (view->pipe)
2166 report("Stopped loading the %s view", view->name),
2167 end_update(view);
2168 }
2169 break;
2171 case REQ_SHOW_VERSION:
2172 report("%s (built %s)", VERSION, __DATE__);
2173 return TRUE;
2175 case REQ_SCREEN_RESIZE:
2176 resize_display();
2177 /* Fall-through */
2178 case REQ_SCREEN_REDRAW:
2179 redraw_display();
2180 break;
2182 case REQ_NONE:
2183 doupdate();
2184 return TRUE;
2186 case REQ_VIEW_CLOSE:
2187 /* XXX: Mark closed views by letting view->parent point to the
2188 * view itself. Parents to closed view should never be
2189 * followed. */
2190 if (view->parent &&
2191 view->parent->parent != view->parent) {
2192 memset(display, 0, sizeof(display));
2193 current_view = 0;
2194 display[current_view] = view->parent;
2195 view->parent = view;
2196 resize_display();
2197 redraw_display();
2198 break;
2199 }
2200 /* Fall-through */
2201 case REQ_QUIT:
2202 return FALSE;
2204 default:
2205 /* An unknown key will show most commonly used commands. */
2206 report("Unknown key, press 'h' for help");
2207 return TRUE;
2208 }
2210 return TRUE;
2211 }
2214 /*
2215 * Pager backend
2216 */
2218 static bool
2219 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2220 {
2221 char *text = line->data;
2222 enum line_type type = line->type;
2223 int textlen = strlen(text);
2224 int attr;
2226 wmove(view->win, lineno, 0);
2228 if (selected) {
2229 type = LINE_CURSOR;
2230 wchgat(view->win, -1, 0, type, NULL);
2231 }
2233 attr = get_line_attr(type);
2234 wattrset(view->win, attr);
2236 if (opt_line_number || opt_tab_size < TABSIZE) {
2237 static char spaces[] = " ";
2238 int col_offset = 0, col = 0;
2240 if (opt_line_number) {
2241 unsigned long real_lineno = view->offset + lineno + 1;
2243 if (real_lineno == 1 ||
2244 (real_lineno % opt_num_interval) == 0) {
2245 wprintw(view->win, "%.*d", view->digits, real_lineno);
2247 } else {
2248 waddnstr(view->win, spaces,
2249 MIN(view->digits, STRING_SIZE(spaces)));
2250 }
2251 waddstr(view->win, ": ");
2252 col_offset = view->digits + 2;
2253 }
2255 while (text && col_offset + col < view->width) {
2256 int cols_max = view->width - col_offset - col;
2257 char *pos = text;
2258 int cols;
2260 if (*text == '\t') {
2261 text++;
2262 assert(sizeof(spaces) > TABSIZE);
2263 pos = spaces;
2264 cols = opt_tab_size - (col % opt_tab_size);
2266 } else {
2267 text = strchr(text, '\t');
2268 cols = line ? text - pos : strlen(pos);
2269 }
2271 waddnstr(view->win, pos, MIN(cols, cols_max));
2272 col += cols;
2273 }
2275 } else {
2276 int col = 0, pos = 0;
2278 for (; pos < textlen && col < view->width; pos++, col++)
2279 if (text[pos] == '\t')
2280 col += TABSIZE - (col % TABSIZE) - 1;
2282 waddnstr(view->win, text, pos);
2283 }
2285 return TRUE;
2286 }
2288 static bool
2289 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2290 {
2291 char refbuf[SIZEOF_STR];
2292 char *ref = NULL;
2293 FILE *pipe;
2295 if (!string_format(refbuf, "git describe %s", commit_id))
2296 return TRUE;
2298 pipe = popen(refbuf, "r");
2299 if (!pipe)
2300 return TRUE;
2302 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2303 ref = chomp_string(ref);
2304 pclose(pipe);
2306 if (!ref || !*ref)
2307 return TRUE;
2309 /* This is the only fatal call, since it can "corrupt" the buffer. */
2310 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2311 return FALSE;
2313 return TRUE;
2314 }
2316 static void
2317 add_pager_refs(struct view *view, struct line *line)
2318 {
2319 char buf[SIZEOF_STR];
2320 char *commit_id = line->data + STRING_SIZE("commit ");
2321 struct ref **refs;
2322 size_t bufpos = 0, refpos = 0;
2323 const char *sep = "Refs: ";
2324 bool is_tag = FALSE;
2326 assert(line->type == LINE_COMMIT);
2328 refs = get_refs(commit_id);
2329 if (!refs) {
2330 if (view == VIEW(REQ_VIEW_DIFF))
2331 goto try_add_describe_ref;
2332 return;
2333 }
2335 do {
2336 struct ref *ref = refs[refpos];
2337 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2339 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2340 return;
2341 sep = ", ";
2342 if (ref->tag)
2343 is_tag = TRUE;
2344 } while (refs[refpos++]->next);
2346 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2347 try_add_describe_ref:
2348 /* Add <tag>-g<commit_id> "fake" reference. */
2349 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2350 return;
2351 }
2353 if (bufpos == 0)
2354 return;
2356 if (!realloc_lines(view, view->line_size + 1))
2357 return;
2359 line = &view->line[view->lines];
2360 line->data = strdup(buf);
2361 if (!line->data)
2362 return;
2364 line->type = LINE_PP_REFS;
2365 view->lines++;
2366 }
2368 static bool
2369 pager_read(struct view *view, char *data)
2370 {
2371 struct line *line = &view->line[view->lines];
2373 line->data = strdup(data);
2374 if (!line->data)
2375 return FALSE;
2377 line->type = get_line_type(line->data);
2378 view->lines++;
2380 if (line->type == LINE_COMMIT &&
2381 (view == VIEW(REQ_VIEW_DIFF) ||
2382 view == VIEW(REQ_VIEW_LOG)))
2383 add_pager_refs(view, line);
2385 return TRUE;
2386 }
2388 static bool
2389 pager_enter(struct view *view, struct line *line)
2390 {
2391 int split = 0;
2393 if (line->type == LINE_COMMIT &&
2394 (view == VIEW(REQ_VIEW_LOG) ||
2395 view == VIEW(REQ_VIEW_PAGER))) {
2396 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2397 split = 1;
2398 }
2400 /* Always scroll the view even if it was split. That way
2401 * you can use Enter to scroll through the log view and
2402 * split open each commit diff. */
2403 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2405 /* FIXME: A minor workaround. Scrolling the view will call report("")
2406 * but if we are scrolling a non-current view this won't properly
2407 * update the view title. */
2408 if (split)
2409 update_view_title(view);
2411 return TRUE;
2412 }
2414 static bool
2415 pager_grep(struct view *view, struct line *line)
2416 {
2417 regmatch_t pmatch;
2418 char *text = line->data;
2420 if (!*text)
2421 return FALSE;
2423 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2424 return FALSE;
2426 return TRUE;
2427 }
2429 static void
2430 pager_select(struct view *view, struct line *line)
2431 {
2432 if (line->type == LINE_COMMIT) {
2433 char *text = line->data;
2435 string_copy(view->ref, text + STRING_SIZE("commit "));
2436 string_copy(ref_commit, view->ref);
2437 }
2438 }
2440 static struct view_ops pager_ops = {
2441 "line",
2442 pager_draw,
2443 pager_read,
2444 pager_enter,
2445 pager_grep,
2446 pager_select,
2447 };
2450 /*
2451 * Tree backend
2452 */
2454 /* Parse output from git-ls-tree(1):
2455 *
2456 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2457 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2458 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2459 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2460 */
2462 #define SIZEOF_TREE_ATTR \
2463 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2465 #define TREE_UP_FORMAT "040000 tree %s\t.."
2467 static int
2468 tree_compare_entry(enum line_type type1, char *name1,
2469 enum line_type type2, char *name2)
2470 {
2471 if (type1 != type2) {
2472 if (type1 == LINE_TREE_DIR)
2473 return -1;
2474 return 1;
2475 }
2477 return strcmp(name1, name2);
2478 }
2480 static bool
2481 tree_read(struct view *view, char *text)
2482 {
2483 size_t textlen = strlen(text);
2484 char buf[SIZEOF_STR];
2485 unsigned long pos;
2486 enum line_type type;
2487 bool first_read = view->lines == 0;
2489 if (textlen <= SIZEOF_TREE_ATTR)
2490 return FALSE;
2492 type = text[STRING_SIZE("100644 ")] == 't'
2493 ? LINE_TREE_DIR : LINE_TREE_FILE;
2495 if (first_read) {
2496 /* Add path info line */
2497 if (string_format(buf, "Directory path /%s", opt_path) &&
2498 realloc_lines(view, view->line_size + 1) &&
2499 pager_read(view, buf))
2500 view->line[view->lines - 1].type = LINE_DEFAULT;
2501 else
2502 return FALSE;
2504 /* Insert "link" to parent directory. */
2505 if (*opt_path &&
2506 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2507 realloc_lines(view, view->line_size + 1) &&
2508 pager_read(view, buf))
2509 view->line[view->lines - 1].type = LINE_TREE_DIR;
2510 else if (*opt_path)
2511 return FALSE;
2512 }
2514 /* Strip the path part ... */
2515 if (*opt_path) {
2516 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2517 size_t striplen = strlen(opt_path);
2518 char *path = text + SIZEOF_TREE_ATTR;
2520 if (pathlen > striplen)
2521 memmove(path, path + striplen,
2522 pathlen - striplen + 1);
2523 }
2525 /* Skip "Directory ..." and ".." line. */
2526 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2527 struct line *line = &view->line[pos];
2528 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2529 char *path2 = text + SIZEOF_TREE_ATTR;
2530 int cmp = tree_compare_entry(line->type, path1, type, path2);
2532 if (cmp <= 0)
2533 continue;
2535 text = strdup(text);
2536 if (!text)
2537 return FALSE;
2539 if (view->lines > pos)
2540 memmove(&view->line[pos + 1], &view->line[pos],
2541 (view->lines - pos) * sizeof(*line));
2543 line = &view->line[pos];
2544 line->data = text;
2545 line->type = type;
2546 view->lines++;
2547 return TRUE;
2548 }
2550 if (!pager_read(view, text))
2551 return FALSE;
2553 /* Move the current line to the first tree entry. */
2554 if (first_read)
2555 view->lineno++;
2557 view->line[view->lines - 1].type = type;
2558 return TRUE;
2559 }
2561 static bool
2562 tree_enter(struct view *view, struct line *line)
2563 {
2564 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2565 enum request request;
2567 switch (line->type) {
2568 case LINE_TREE_DIR:
2569 /* Depending on whether it is a subdir or parent (updir?) link
2570 * mangle the path buffer. */
2571 if (line == &view->line[1] && *opt_path) {
2572 size_t path_len = strlen(opt_path);
2573 char *dirsep = opt_path + path_len - 1;
2575 while (dirsep > opt_path && dirsep[-1] != '/')
2576 dirsep--;
2578 dirsep[0] = 0;
2580 } else {
2581 size_t pathlen = strlen(opt_path);
2582 size_t origlen = pathlen;
2583 char *data = line->data;
2584 char *basename = data + SIZEOF_TREE_ATTR;
2586 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2587 opt_path[origlen] = 0;
2588 return TRUE;
2589 }
2590 }
2592 /* Trees and subtrees share the same ID, so they are not not
2593 * unique like blobs. */
2594 flags |= OPEN_RELOAD;
2595 request = REQ_VIEW_TREE;
2596 break;
2598 case LINE_TREE_FILE:
2599 request = REQ_VIEW_BLOB;
2600 break;
2602 default:
2603 return TRUE;
2604 }
2606 open_view(view, request, flags);
2608 return TRUE;
2609 }
2611 static void
2612 tree_select(struct view *view, struct line *line)
2613 {
2614 char *text = line->data;
2616 text += STRING_SIZE("100644 blob ");
2618 if (line->type == LINE_TREE_FILE) {
2619 string_ncopy(ref_blob, text, 40);
2620 /* Also update the blob view's ref, since all there must always
2621 * be in sync. */
2622 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2624 } else if (line->type != LINE_TREE_DIR) {
2625 return;
2626 }
2628 string_ncopy(view->ref, text, 40);
2629 }
2631 static struct view_ops tree_ops = {
2632 "file",
2633 pager_draw,
2634 tree_read,
2635 tree_enter,
2636 pager_grep,
2637 tree_select,
2638 };
2640 static bool
2641 blob_read(struct view *view, char *line)
2642 {
2643 bool state = pager_read(view, line);
2645 if (state == TRUE)
2646 view->line[view->lines - 1].type = LINE_DEFAULT;
2648 return state;
2649 }
2651 static struct view_ops blob_ops = {
2652 "line",
2653 pager_draw,
2654 blob_read,
2655 pager_enter,
2656 pager_grep,
2657 pager_select,
2658 };
2661 /*
2662 * Main view backend
2663 */
2665 struct commit {
2666 char id[SIZEOF_REV]; /* SHA1 ID. */
2667 char title[75]; /* First line of the commit message. */
2668 char author[75]; /* Author of the commit. */
2669 struct tm time; /* Date from the author ident. */
2670 struct ref **refs; /* Repository references. */
2671 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2672 size_t graph_size; /* The width of the graph array. */
2673 };
2675 static bool
2676 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2677 {
2678 char buf[DATE_COLS + 1];
2679 struct commit *commit = line->data;
2680 enum line_type type;
2681 int col = 0;
2682 size_t timelen;
2683 size_t authorlen;
2684 int trimmed = 1;
2686 if (!*commit->author)
2687 return FALSE;
2689 wmove(view->win, lineno, col);
2691 if (selected) {
2692 type = LINE_CURSOR;
2693 wattrset(view->win, get_line_attr(type));
2694 wchgat(view->win, -1, 0, type, NULL);
2696 } else {
2697 type = LINE_MAIN_COMMIT;
2698 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2699 }
2701 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2702 waddnstr(view->win, buf, timelen);
2703 waddstr(view->win, " ");
2705 col += DATE_COLS;
2706 wmove(view->win, lineno, col);
2707 if (type != LINE_CURSOR)
2708 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2710 if (opt_utf8) {
2711 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2712 } else {
2713 authorlen = strlen(commit->author);
2714 if (authorlen > AUTHOR_COLS - 2) {
2715 authorlen = AUTHOR_COLS - 2;
2716 trimmed = 1;
2717 }
2718 }
2720 if (trimmed) {
2721 waddnstr(view->win, commit->author, authorlen);
2722 if (type != LINE_CURSOR)
2723 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2724 waddch(view->win, '~');
2725 } else {
2726 waddstr(view->win, commit->author);
2727 }
2729 col += AUTHOR_COLS;
2730 if (type != LINE_CURSOR)
2731 wattrset(view->win, A_NORMAL);
2733 if (opt_rev_graph && commit->graph_size) {
2734 size_t i;
2736 wmove(view->win, lineno, col);
2737 /* Using waddch() instead of waddnstr() ensures that
2738 * they'll be rendered correctly for the cursor line. */
2739 for (i = 0; i < commit->graph_size; i++)
2740 waddch(view->win, commit->graph[i]);
2742 col += commit->graph_size + 1;
2743 }
2745 wmove(view->win, lineno, col);
2747 if (commit->refs) {
2748 size_t i = 0;
2750 do {
2751 if (type == LINE_CURSOR)
2752 ;
2753 else if (commit->refs[i]->tag)
2754 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2755 else
2756 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2757 waddstr(view->win, "[");
2758 waddstr(view->win, commit->refs[i]->name);
2759 waddstr(view->win, "]");
2760 if (type != LINE_CURSOR)
2761 wattrset(view->win, A_NORMAL);
2762 waddstr(view->win, " ");
2763 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2764 } while (commit->refs[i++]->next);
2765 }
2767 if (type != LINE_CURSOR)
2768 wattrset(view->win, get_line_attr(type));
2770 {
2771 int titlelen = strlen(commit->title);
2773 if (col + titlelen > view->width)
2774 titlelen = view->width - col;
2776 waddnstr(view->win, commit->title, titlelen);
2777 }
2779 return TRUE;
2780 }
2783 struct rev_stack {
2784 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
2785 size_t size;
2786 };
2788 /* The current stack of revisions on the graph. */
2789 static struct rev_stack graph_stacks[2];
2790 static unsigned int graph_stack_no;
2792 /* Parents of the commit being visualized. */
2793 static struct rev_stack graph_parents;
2795 static void
2796 push_rev_stack(struct rev_stack *stack, char *parent)
2797 {
2798 fprintf(stderr, " (%s)", parent);
2800 /* Combine duplicate parents lines. */
2801 if (stack->size > 0 &&
2802 !strncmp(stack->rev[stack->size - 1], parent, SIZEOF_REV))
2803 return;
2805 if (stack->size < SIZEOF_REVITEMS) {
2806 string_ncopy(stack->rev[stack->size++], parent, SIZEOF_REV);
2807 }
2808 }
2810 void
2811 update_rev_graph(struct commit *commit)
2812 {
2813 struct rev_stack *stack = &graph_stacks[graph_stack_no++ & 1];
2814 struct rev_stack *graph = &graph_stacks[graph_stack_no & 1];
2815 static chtype last_symbol;
2816 chtype symbol, separator, line;
2817 size_t stackpos = 0;
2818 size_t i;
2820 // FIXME: Initial commit ... assert(rev_graph_commit == commit);
2821 fprintf(stderr, "\n%p <%s> ", graph, commit->id);
2823 /* First traverse all lines of revisions up to the active one. */
2824 for (stackpos = 0; stackpos < stack->size; stackpos++) {
2825 if (!strcmp(stack->rev[stackpos], commit->id)) {
2826 break;
2827 }
2829 push_rev_stack(graph, stack->rev[stackpos]);
2830 }
2832 assert(commit->graph_size < ARRAY_SIZE(commit->graph));
2834 for (i = 0; i < graph_parents.size; i++)
2835 push_rev_stack(graph, graph_parents.rev[i]);
2837 /* Place the symbol for this commit. */
2838 if (graph_parents.size == 0)
2839 symbol = 'I';
2840 else if (graph_parents.size > 1)
2841 symbol = 'M';
2842 else if (stackpos >= stack->size)
2843 symbol = '+';
2844 else
2845 symbol = '*';
2847 i = stackpos + 1;
2849 /* FIXME: Moving branches left and right when collapsing a branch. */
2850 while (i < stack->size)
2851 push_rev_stack(graph, stack->rev[i++]);
2853 separator = ' ';
2854 line = ACS_VLINE;
2856 for (i = 0; i < stackpos; i++) {
2857 commit->graph[commit->graph_size++] = line;
2858 if (last_symbol == 'M') {
2859 separator = '`';
2860 line = '.';
2861 }
2862 commit->graph[commit->graph_size++] = separator;
2863 }
2865 commit->graph[commit->graph_size++] = symbol;
2867 separator = ' ';
2868 line = ACS_VLINE;
2869 if (last_symbol == 'M') {
2870 line = ' ';
2871 }
2873 for (i += 1; i < stack->size; i++) {
2874 commit->graph[commit->graph_size++] = separator;
2875 commit->graph[commit->graph_size++] = line;
2876 if (last_symbol == 'M') {
2877 separator = '`';
2878 line = '.';
2879 }
2880 }
2882 last_symbol = symbol;
2883 stack->size = graph_parents.size = 0;
2884 }
2886 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2887 static bool
2888 main_read(struct view *view, char *line)
2889 {
2890 enum line_type type = get_line_type(line);
2891 struct commit *commit = view->lines
2892 ? view->line[view->lines - 1].data : NULL;
2894 switch (type) {
2895 case LINE_COMMIT:
2896 commit = calloc(1, sizeof(struct commit));
2897 if (!commit)
2898 return FALSE;
2900 line += STRING_SIZE("commit ");
2902 view->line[view->lines++].data = commit;
2903 string_copy(commit->id, line);
2904 commit->refs = get_refs(commit->id);
2905 fprintf(stderr, "\n%p [%s]", &graph_stacks[graph_stack_no], commit->id);
2906 break;
2908 case LINE_PARENT:
2909 if (commit) {
2910 line += STRING_SIZE("parent ");
2911 push_rev_stack(&graph_parents, line);
2912 }
2913 break;
2915 case LINE_AUTHOR:
2916 {
2917 char *ident = line + STRING_SIZE("author ");
2918 char *end = strchr(ident, '<');
2920 if (!commit)
2921 break;
2923 update_rev_graph(commit);
2925 if (end) {
2926 char *email = end + 1;
2928 for (; end > ident && isspace(end[-1]); end--) ;
2930 if (end == ident && *email) {
2931 ident = email;
2932 end = strchr(ident, '>');
2933 for (; end > ident && isspace(end[-1]); end--) ;
2934 }
2935 *end = 0;
2936 }
2938 /* End is NULL or ident meaning there's no author. */
2939 if (end <= ident)
2940 ident = "Unknown";
2942 string_copy(commit->author, ident);
2944 /* Parse epoch and timezone */
2945 if (end) {
2946 char *secs = strchr(end + 1, '>');
2947 char *zone;
2948 time_t time;
2950 if (!secs || secs[1] != ' ')
2951 break;
2953 secs += 2;
2954 time = (time_t) atol(secs);
2955 zone = strchr(secs, ' ');
2956 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2957 long tz;
2959 zone++;
2960 tz = ('0' - zone[1]) * 60 * 60 * 10;
2961 tz += ('0' - zone[2]) * 60 * 60;
2962 tz += ('0' - zone[3]) * 60;
2963 tz += ('0' - zone[4]) * 60;
2965 if (zone[0] == '-')
2966 tz = -tz;
2968 time -= tz;
2969 }
2970 gmtime_r(&time, &commit->time);
2971 }
2972 break;
2973 }
2974 default:
2975 if (!commit)
2976 break;
2978 /* Fill in the commit title if it has not already been set. */
2979 if (commit->title[0])
2980 break;
2982 /* Require titles to start with a non-space character at the
2983 * offset used by git log. */
2984 /* FIXME: More gracefull handling of titles; append "..." to
2985 * shortened titles, etc. */
2986 if (strncmp(line, " ", 4) ||
2987 isspace(line[4]))
2988 break;
2990 string_copy(commit->title, line + 4);
2991 }
2993 return TRUE;
2994 }
2996 static bool
2997 main_enter(struct view *view, struct line *line)
2998 {
2999 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3001 open_view(view, REQ_VIEW_DIFF, flags);
3002 return TRUE;
3003 }
3005 static bool
3006 main_grep(struct view *view, struct line *line)
3007 {
3008 struct commit *commit = line->data;
3009 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
3010 char buf[DATE_COLS + 1];
3011 regmatch_t pmatch;
3013 for (state = S_TITLE; state < S_END; state++) {
3014 char *text;
3016 switch (state) {
3017 case S_TITLE: text = commit->title; break;
3018 case S_AUTHOR: text = commit->author; break;
3019 case S_DATE:
3020 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
3021 continue;
3022 text = buf;
3023 break;
3025 default:
3026 return FALSE;
3027 }
3029 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3030 return TRUE;
3031 }
3033 return FALSE;
3034 }
3036 static void
3037 main_select(struct view *view, struct line *line)
3038 {
3039 struct commit *commit = line->data;
3041 string_copy(view->ref, commit->id);
3042 string_copy(ref_commit, view->ref);
3043 }
3045 static struct view_ops main_ops = {
3046 "commit",
3047 main_draw,
3048 main_read,
3049 main_enter,
3050 main_grep,
3051 main_select,
3052 };
3055 /*
3056 * Unicode / UTF-8 handling
3057 *
3058 * NOTE: Much of the following code for dealing with unicode is derived from
3059 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
3060 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
3061 */
3063 /* I've (over)annotated a lot of code snippets because I am not entirely
3064 * confident that the approach taken by this small UTF-8 interface is correct.
3065 * --jonas */
3067 static inline int
3068 unicode_width(unsigned long c)
3069 {
3070 if (c >= 0x1100 &&
3071 (c <= 0x115f /* Hangul Jamo */
3072 || c == 0x2329
3073 || c == 0x232a
3074 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
3075 /* CJK ... Yi */
3076 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
3077 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
3078 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
3079 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
3080 || (c >= 0xffe0 && c <= 0xffe6)
3081 || (c >= 0x20000 && c <= 0x2fffd)
3082 || (c >= 0x30000 && c <= 0x3fffd)))
3083 return 2;
3085 return 1;
3086 }
3088 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3089 * Illegal bytes are set one. */
3090 static const unsigned char utf8_bytes[256] = {
3091 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,
3092 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,
3093 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,
3094 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,
3095 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,
3096 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,
3097 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,
3098 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,
3099 };
3101 /* Decode UTF-8 multi-byte representation into a unicode character. */
3102 static inline unsigned long
3103 utf8_to_unicode(const char *string, size_t length)
3104 {
3105 unsigned long unicode;
3107 switch (length) {
3108 case 1:
3109 unicode = string[0];
3110 break;
3111 case 2:
3112 unicode = (string[0] & 0x1f) << 6;
3113 unicode += (string[1] & 0x3f);
3114 break;
3115 case 3:
3116 unicode = (string[0] & 0x0f) << 12;
3117 unicode += ((string[1] & 0x3f) << 6);
3118 unicode += (string[2] & 0x3f);
3119 break;
3120 case 4:
3121 unicode = (string[0] & 0x0f) << 18;
3122 unicode += ((string[1] & 0x3f) << 12);
3123 unicode += ((string[2] & 0x3f) << 6);
3124 unicode += (string[3] & 0x3f);
3125 break;
3126 case 5:
3127 unicode = (string[0] & 0x0f) << 24;
3128 unicode += ((string[1] & 0x3f) << 18);
3129 unicode += ((string[2] & 0x3f) << 12);
3130 unicode += ((string[3] & 0x3f) << 6);
3131 unicode += (string[4] & 0x3f);
3132 break;
3133 case 6:
3134 unicode = (string[0] & 0x01) << 30;
3135 unicode += ((string[1] & 0x3f) << 24);
3136 unicode += ((string[2] & 0x3f) << 18);
3137 unicode += ((string[3] & 0x3f) << 12);
3138 unicode += ((string[4] & 0x3f) << 6);
3139 unicode += (string[5] & 0x3f);
3140 break;
3141 default:
3142 die("Invalid unicode length");
3143 }
3145 /* Invalid characters could return the special 0xfffd value but NUL
3146 * should be just as good. */
3147 return unicode > 0xffff ? 0 : unicode;
3148 }
3150 /* Calculates how much of string can be shown within the given maximum width
3151 * and sets trimmed parameter to non-zero value if all of string could not be
3152 * shown.
3153 *
3154 * Additionally, adds to coloffset how many many columns to move to align with
3155 * the expected position. Takes into account how multi-byte and double-width
3156 * characters will effect the cursor position.
3157 *
3158 * Returns the number of bytes to output from string to satisfy max_width. */
3159 static size_t
3160 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3161 {
3162 const char *start = string;
3163 const char *end = strchr(string, '\0');
3164 size_t mbwidth = 0;
3165 size_t width = 0;
3167 *trimmed = 0;
3169 while (string < end) {
3170 int c = *(unsigned char *) string;
3171 unsigned char bytes = utf8_bytes[c];
3172 size_t ucwidth;
3173 unsigned long unicode;
3175 if (string + bytes > end)
3176 break;
3178 /* Change representation to figure out whether
3179 * it is a single- or double-width character. */
3181 unicode = utf8_to_unicode(string, bytes);
3182 /* FIXME: Graceful handling of invalid unicode character. */
3183 if (!unicode)
3184 break;
3186 ucwidth = unicode_width(unicode);
3187 width += ucwidth;
3188 if (width > max_width) {
3189 *trimmed = 1;
3190 break;
3191 }
3193 /* The column offset collects the differences between the
3194 * number of bytes encoding a character and the number of
3195 * columns will be used for rendering said character.
3196 *
3197 * So if some character A is encoded in 2 bytes, but will be
3198 * represented on the screen using only 1 byte this will and up
3199 * adding 1 to the multi-byte column offset.
3200 *
3201 * Assumes that no double-width character can be encoding in
3202 * less than two bytes. */
3203 if (bytes > ucwidth)
3204 mbwidth += bytes - ucwidth;
3206 string += bytes;
3207 }
3209 *coloffset += mbwidth;
3211 return string - start;
3212 }
3215 /*
3216 * Status management
3217 */
3219 /* Whether or not the curses interface has been initialized. */
3220 static bool cursed = FALSE;
3222 /* The status window is used for polling keystrokes. */
3223 static WINDOW *status_win;
3225 /* Update status and title window. */
3226 static void
3227 report(const char *msg, ...)
3228 {
3229 static bool empty = TRUE;
3230 struct view *view = display[current_view];
3232 if (!empty || *msg) {
3233 va_list args;
3235 va_start(args, msg);
3237 werase(status_win);
3238 wmove(status_win, 0, 0);
3239 if (*msg) {
3240 vwprintw(status_win, msg, args);
3241 empty = FALSE;
3242 } else {
3243 empty = TRUE;
3244 }
3245 wrefresh(status_win);
3247 va_end(args);
3248 }
3250 update_view_title(view);
3251 update_display_cursor();
3252 }
3254 /* Controls when nodelay should be in effect when polling user input. */
3255 static void
3256 set_nonblocking_input(bool loading)
3257 {
3258 static unsigned int loading_views;
3260 if ((loading == FALSE && loading_views-- == 1) ||
3261 (loading == TRUE && loading_views++ == 0))
3262 nodelay(status_win, loading);
3263 }
3265 static void
3266 init_display(void)
3267 {
3268 int x, y;
3270 /* Initialize the curses library */
3271 if (isatty(STDIN_FILENO)) {
3272 cursed = !!initscr();
3273 } else {
3274 /* Leave stdin and stdout alone when acting as a pager. */
3275 FILE *io = fopen("/dev/tty", "r+");
3277 if (!io)
3278 die("Failed to open /dev/tty");
3279 cursed = !!newterm(NULL, io, io);
3280 }
3282 if (!cursed)
3283 die("Failed to initialize curses");
3285 nonl(); /* Tell curses not to do NL->CR/NL on output */
3286 cbreak(); /* Take input chars one at a time, no wait for \n */
3287 noecho(); /* Don't echo input */
3288 leaveok(stdscr, TRUE);
3290 if (has_colors())
3291 init_colors();
3293 getmaxyx(stdscr, y, x);
3294 status_win = newwin(1, 0, y - 1, 0);
3295 if (!status_win)
3296 die("Failed to create status window");
3298 /* Enable keyboard mapping */
3299 keypad(status_win, TRUE);
3300 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3301 }
3303 static char *
3304 read_prompt(const char *prompt)
3305 {
3306 enum { READING, STOP, CANCEL } status = READING;
3307 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3308 int pos = 0;
3310 while (status == READING) {
3311 struct view *view;
3312 int i, key;
3314 foreach_view (view, i)
3315 update_view(view);
3317 report("%s%.*s", prompt, pos, buf);
3318 /* Refresh, accept single keystroke of input */
3319 key = wgetch(status_win);
3320 switch (key) {
3321 case KEY_RETURN:
3322 case KEY_ENTER:
3323 case '\n':
3324 status = pos ? STOP : CANCEL;
3325 break;
3327 case KEY_BACKSPACE:
3328 if (pos > 0)
3329 pos--;
3330 else
3331 status = CANCEL;
3332 break;
3334 case KEY_ESC:
3335 status = CANCEL;
3336 break;
3338 case ERR:
3339 break;
3341 default:
3342 if (pos >= sizeof(buf)) {
3343 report("Input string too long");
3344 return NULL;
3345 }
3347 if (isprint(key))
3348 buf[pos++] = (char) key;
3349 }
3350 }
3352 if (status == CANCEL) {
3353 /* Clear the status window */
3354 report("");
3355 return NULL;
3356 }
3358 buf[pos++] = 0;
3360 return buf;
3361 }
3363 /*
3364 * Repository references
3365 */
3367 static struct ref *refs;
3368 static size_t refs_size;
3370 /* Id <-> ref store */
3371 static struct ref ***id_refs;
3372 static size_t id_refs_size;
3374 static struct ref **
3375 get_refs(char *id)
3376 {
3377 struct ref ***tmp_id_refs;
3378 struct ref **ref_list = NULL;
3379 size_t ref_list_size = 0;
3380 size_t i;
3382 for (i = 0; i < id_refs_size; i++)
3383 if (!strcmp(id, id_refs[i][0]->id))
3384 return id_refs[i];
3386 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3387 if (!tmp_id_refs)
3388 return NULL;
3390 id_refs = tmp_id_refs;
3392 for (i = 0; i < refs_size; i++) {
3393 struct ref **tmp;
3395 if (strcmp(id, refs[i].id))
3396 continue;
3398 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3399 if (!tmp) {
3400 if (ref_list)
3401 free(ref_list);
3402 return NULL;
3403 }
3405 ref_list = tmp;
3406 if (ref_list_size > 0)
3407 ref_list[ref_list_size - 1]->next = 1;
3408 ref_list[ref_list_size] = &refs[i];
3410 /* XXX: The properties of the commit chains ensures that we can
3411 * safely modify the shared ref. The repo references will
3412 * always be similar for the same id. */
3413 ref_list[ref_list_size]->next = 0;
3414 ref_list_size++;
3415 }
3417 if (ref_list)
3418 id_refs[id_refs_size++] = ref_list;
3420 return ref_list;
3421 }
3423 static int
3424 read_ref(char *id, int idlen, char *name, int namelen)
3425 {
3426 struct ref *ref;
3427 bool tag = FALSE;
3429 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3430 /* Commits referenced by tags has "^{}" appended. */
3431 if (name[namelen - 1] != '}')
3432 return OK;
3434 while (namelen > 0 && name[namelen] != '^')
3435 namelen--;
3437 tag = TRUE;
3438 namelen -= STRING_SIZE("refs/tags/");
3439 name += STRING_SIZE("refs/tags/");
3441 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3442 namelen -= STRING_SIZE("refs/heads/");
3443 name += STRING_SIZE("refs/heads/");
3445 } else if (!strcmp(name, "HEAD")) {
3446 return OK;
3447 }
3449 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3450 if (!refs)
3451 return ERR;
3453 ref = &refs[refs_size++];
3454 ref->name = malloc(namelen + 1);
3455 if (!ref->name)
3456 return ERR;
3458 strncpy(ref->name, name, namelen);
3459 ref->name[namelen] = 0;
3460 ref->tag = tag;
3461 string_copy(ref->id, id);
3463 return OK;
3464 }
3466 static int
3467 load_refs(void)
3468 {
3469 const char *cmd_env = getenv("TIG_LS_REMOTE");
3470 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3472 return read_properties(popen(cmd, "r"), "\t", read_ref);
3473 }
3475 static int
3476 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3477 {
3478 if (!strcmp(name, "i18n.commitencoding"))
3479 string_copy(opt_encoding, value);
3481 return OK;
3482 }
3484 static int
3485 load_repo_config(void)
3486 {
3487 return read_properties(popen("git repo-config --list", "r"),
3488 "=", read_repo_config_option);
3489 }
3491 static int
3492 read_properties(FILE *pipe, const char *separators,
3493 int (*read_property)(char *, int, char *, int))
3494 {
3495 char buffer[BUFSIZ];
3496 char *name;
3497 int state = OK;
3499 if (!pipe)
3500 return ERR;
3502 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3503 char *value;
3504 size_t namelen;
3505 size_t valuelen;
3507 name = chomp_string(name);
3508 namelen = strcspn(name, separators);
3510 if (name[namelen]) {
3511 name[namelen] = 0;
3512 value = chomp_string(name + namelen + 1);
3513 valuelen = strlen(value);
3515 } else {
3516 value = "";
3517 valuelen = 0;
3518 }
3520 state = read_property(name, namelen, value, valuelen);
3521 }
3523 if (state != ERR && ferror(pipe))
3524 state = ERR;
3526 pclose(pipe);
3528 return state;
3529 }
3532 /*
3533 * Main
3534 */
3536 static void __NORETURN
3537 quit(int sig)
3538 {
3539 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3540 if (cursed)
3541 endwin();
3542 exit(0);
3543 }
3545 static void __NORETURN
3546 die(const char *err, ...)
3547 {
3548 va_list args;
3550 endwin();
3552 va_start(args, err);
3553 fputs("tig: ", stderr);
3554 vfprintf(stderr, err, args);
3555 fputs("\n", stderr);
3556 va_end(args);
3558 exit(1);
3559 }
3561 int
3562 main(int argc, char *argv[])
3563 {
3564 struct view *view;
3565 enum request request;
3566 size_t i;
3568 signal(SIGINT, quit);
3570 if (setlocale(LC_ALL, "")) {
3571 string_copy(opt_codeset, nl_langinfo(CODESET));
3572 }
3574 if (load_options() == ERR)
3575 die("Failed to load user config.");
3577 /* Load the repo config file so options can be overwritten from
3578 * the command line. */
3579 if (load_repo_config() == ERR)
3580 die("Failed to load repo config.");
3582 if (!parse_options(argc, argv))
3583 return 0;
3585 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3586 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3587 if (opt_iconv == ICONV_NONE)
3588 die("Failed to initialize character set conversion");
3589 }
3591 if (load_refs() == ERR)
3592 die("Failed to load refs.");
3594 /* Require a git repository unless when running in pager mode. */
3595 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3596 die("Not a git repository");
3598 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3599 view->cmd_env = getenv(view->cmd_env);
3601 request = opt_request;
3603 init_display();
3605 while (view_driver(display[current_view], request)) {
3606 int key;
3607 int i;
3609 foreach_view (view, i)
3610 update_view(view);
3612 /* Refresh, accept single keystroke of input */
3613 key = wgetch(status_win);
3615 request = get_keybinding(display[current_view]->keymap, key);
3617 /* Some low-level request handling. This keeps access to
3618 * status_win restricted. */
3619 switch (request) {
3620 case REQ_PROMPT:
3621 {
3622 char *cmd = read_prompt(":");
3624 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3625 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3626 opt_request = REQ_VIEW_DIFF;
3627 } else {
3628 opt_request = REQ_VIEW_PAGER;
3629 }
3630 break;
3631 }
3633 request = REQ_NONE;
3634 break;
3635 }
3636 case REQ_SEARCH:
3637 case REQ_SEARCH_BACK:
3638 {
3639 const char *prompt = request == REQ_SEARCH
3640 ? "/" : "?";
3641 char *search = read_prompt(prompt);
3643 if (search)
3644 string_copy(opt_search, search);
3645 else
3646 request = REQ_NONE;
3647 break;
3648 }
3649 case REQ_SCREEN_RESIZE:
3650 {
3651 int height, width;
3653 getmaxyx(stdscr, height, width);
3655 /* Resize the status view and let the view driver take
3656 * care of resizing the displayed views. */
3657 wresize(status_win, 1, width);
3658 mvwin(status_win, height - 1, 0);
3659 wrefresh(status_win);
3660 break;
3661 }
3662 default:
3663 break;
3664 }
3665 }
3667 quit(0);
3669 return 0;
3670 }