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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 "unknown-version"
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 <sys/types.h>
31 #include <sys/stat.h>
32 #include <unistd.h>
33 #include <time.h>
35 #include <regex.h>
37 #include <locale.h>
38 #include <langinfo.h>
39 #include <iconv.h>
41 #include <curses.h>
43 #if __GNUC__ >= 3
44 #define __NORETURN __attribute__((__noreturn__))
45 #else
46 #define __NORETURN
47 #endif
49 static void __NORETURN die(const char *err, ...);
50 static void report(const char *msg, ...);
51 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, size_t, char *, size_t));
52 static void set_nonblocking_input(bool loading);
53 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
55 #define ABS(x) ((x) >= 0 ? (x) : -(x))
56 #define MIN(x, y) ((x) < (y) ? (x) : (y))
58 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
59 #define STRING_SIZE(x) (sizeof(x) - 1)
61 #define SIZEOF_STR 1024 /* Default string size. */
62 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
63 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
65 /* Revision graph */
67 #define REVGRAPH_INIT 'I'
68 #define REVGRAPH_MERGE 'M'
69 #define REVGRAPH_BRANCH '+'
70 #define REVGRAPH_COMMIT '*'
71 #define REVGRAPH_LINE '|'
73 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
75 /* This color name can be used to refer to the default term colors. */
76 #define COLOR_DEFAULT (-1)
78 #define ICONV_NONE ((iconv_t) -1)
80 /* The format and size of the date column in the main view. */
81 #define DATE_FORMAT "%Y-%m-%d %H:%M"
82 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
84 #define AUTHOR_COLS 20
86 /* The default interval between line numbers. */
87 #define NUMBER_INTERVAL 1
89 #define TABSIZE 8
91 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
93 #define TIG_LS_REMOTE \
94 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
96 #define TIG_DIFF_CMD \
97 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
99 #define TIG_LOG_CMD \
100 "git log --cc --stat -n100 %s 2>/dev/null"
102 #define TIG_MAIN_CMD \
103 "git log --topo-order --pretty=raw %s 2>/dev/null"
105 #define TIG_TREE_CMD \
106 "git ls-tree %s %s"
108 #define TIG_BLOB_CMD \
109 "git cat-file blob %s"
111 /* XXX: Needs to be defined to the empty string. */
112 #define TIG_HELP_CMD ""
113 #define TIG_PAGER_CMD ""
114 #define TIG_STATUS_CMD ""
116 /* Some ascii-shorthands fitted into the ncurses namespace. */
117 #define KEY_TAB '\t'
118 #define KEY_RETURN '\r'
119 #define KEY_ESC 27
122 struct ref {
123 char *name; /* Ref name; tag or head names are shortened. */
124 char id[SIZEOF_REV]; /* Commit SHA1 ID */
125 unsigned int tag:1; /* Is it a tag? */
126 unsigned int remote:1; /* Is it a remote ref? */
127 unsigned int next:1; /* For ref lists: are there more refs? */
128 };
130 static struct ref **get_refs(char *id);
132 struct int_map {
133 const char *name;
134 int namelen;
135 int value;
136 };
138 static int
139 set_from_int_map(struct int_map *map, size_t map_size,
140 int *value, const char *name, int namelen)
141 {
143 int i;
145 for (i = 0; i < map_size; i++)
146 if (namelen == map[i].namelen &&
147 !strncasecmp(name, map[i].name, namelen)) {
148 *value = map[i].value;
149 return OK;
150 }
152 return ERR;
153 }
156 /*
157 * String helpers
158 */
160 static inline void
161 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
162 {
163 if (srclen > dstlen - 1)
164 srclen = dstlen - 1;
166 strncpy(dst, src, srclen);
167 dst[srclen] = 0;
168 }
170 /* Shorthands for safely copying into a fixed buffer. */
172 #define string_copy(dst, src) \
173 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
175 #define string_ncopy(dst, src, srclen) \
176 string_ncopy_do(dst, sizeof(dst), src, srclen)
178 #define string_copy_rev(dst, src) \
179 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
181 #define string_add(dst, from, src) \
182 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
184 static char *
185 chomp_string(char *name)
186 {
187 int namelen;
189 while (isspace(*name))
190 name++;
192 namelen = strlen(name) - 1;
193 while (namelen > 0 && isspace(name[namelen]))
194 name[namelen--] = 0;
196 return name;
197 }
199 static bool
200 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
201 {
202 va_list args;
203 size_t pos = bufpos ? *bufpos : 0;
205 va_start(args, fmt);
206 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
207 va_end(args);
209 if (bufpos)
210 *bufpos = pos;
212 return pos >= bufsize ? FALSE : TRUE;
213 }
215 #define string_format(buf, fmt, args...) \
216 string_nformat(buf, sizeof(buf), NULL, fmt, args)
218 #define string_format_from(buf, from, fmt, args...) \
219 string_nformat(buf, sizeof(buf), from, fmt, args)
221 static int
222 string_enum_compare(const char *str1, const char *str2, int len)
223 {
224 size_t i;
226 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
228 /* Diff-Header == DIFF_HEADER */
229 for (i = 0; i < len; i++) {
230 if (toupper(str1[i]) == toupper(str2[i]))
231 continue;
233 if (string_enum_sep(str1[i]) &&
234 string_enum_sep(str2[i]))
235 continue;
237 return str1[i] - str2[i];
238 }
240 return 0;
241 }
243 /* Shell quoting
244 *
245 * NOTE: The following is a slightly modified copy of the git project's shell
246 * quoting routines found in the quote.c file.
247 *
248 * Help to copy the thing properly quoted for the shell safety. any single
249 * quote is replaced with '\'', any exclamation point is replaced with '\!',
250 * and the whole thing is enclosed in a
251 *
252 * E.g.
253 * original sq_quote result
254 * name ==> name ==> 'name'
255 * a b ==> a b ==> 'a b'
256 * a'b ==> a'\''b ==> 'a'\''b'
257 * a!b ==> a'\!'b ==> 'a'\!'b'
258 */
260 static size_t
261 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
262 {
263 char c;
265 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
267 BUFPUT('\'');
268 while ((c = *src++)) {
269 if (c == '\'' || c == '!') {
270 BUFPUT('\'');
271 BUFPUT('\\');
272 BUFPUT(c);
273 BUFPUT('\'');
274 } else {
275 BUFPUT(c);
276 }
277 }
278 BUFPUT('\'');
280 if (bufsize < SIZEOF_STR)
281 buf[bufsize] = 0;
283 return bufsize;
284 }
287 /*
288 * User requests
289 */
291 #define REQ_INFO \
292 /* XXX: Keep the view request first and in sync with views[]. */ \
293 REQ_GROUP("View switching") \
294 REQ_(VIEW_MAIN, "Show main view"), \
295 REQ_(VIEW_DIFF, "Show diff view"), \
296 REQ_(VIEW_LOG, "Show log view"), \
297 REQ_(VIEW_TREE, "Show tree view"), \
298 REQ_(VIEW_BLOB, "Show blob view"), \
299 REQ_(VIEW_HELP, "Show help page"), \
300 REQ_(VIEW_PAGER, "Show pager view"), \
301 REQ_(VIEW_STATUS, "Show status view"), \
302 \
303 REQ_GROUP("View manipulation") \
304 REQ_(ENTER, "Enter current line and scroll"), \
305 REQ_(NEXT, "Move to next"), \
306 REQ_(PREVIOUS, "Move to previous"), \
307 REQ_(VIEW_NEXT, "Move focus to next view"), \
308 REQ_(VIEW_CLOSE, "Close the current view"), \
309 REQ_(QUIT, "Close all views and quit"), \
310 \
311 REQ_GROUP("Cursor navigation") \
312 REQ_(MOVE_UP, "Move cursor one line up"), \
313 REQ_(MOVE_DOWN, "Move cursor one line down"), \
314 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
315 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
316 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
317 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
318 \
319 REQ_GROUP("Scrolling") \
320 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
321 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
322 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
323 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
324 \
325 REQ_GROUP("Searching") \
326 REQ_(SEARCH, "Search the view"), \
327 REQ_(SEARCH_BACK, "Search backwards in the view"), \
328 REQ_(FIND_NEXT, "Find next search match"), \
329 REQ_(FIND_PREV, "Find previous search match"), \
330 \
331 REQ_GROUP("Misc") \
332 REQ_(NONE, "Do nothing"), \
333 REQ_(PROMPT, "Bring up the prompt"), \
334 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
335 REQ_(SCREEN_RESIZE, "Resize the screen"), \
336 REQ_(SHOW_VERSION, "Show version information"), \
337 REQ_(STOP_LOADING, "Stop all loading views"), \
338 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
339 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
340 REQ_(STATUS_UPDATE, "Update file status") \
343 /* User action requests. */
344 enum request {
345 #define REQ_GROUP(help)
346 #define REQ_(req, help) REQ_##req
348 /* Offset all requests to avoid conflicts with ncurses getch values. */
349 REQ_OFFSET = KEY_MAX + 1,
350 REQ_INFO,
351 REQ_UNKNOWN,
353 #undef REQ_GROUP
354 #undef REQ_
355 };
357 struct request_info {
358 enum request request;
359 char *name;
360 int namelen;
361 char *help;
362 };
364 static struct request_info req_info[] = {
365 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
366 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
367 REQ_INFO
368 #undef REQ_GROUP
369 #undef REQ_
370 };
372 static enum request
373 get_request(const char *name)
374 {
375 int namelen = strlen(name);
376 int i;
378 for (i = 0; i < ARRAY_SIZE(req_info); i++)
379 if (req_info[i].namelen == namelen &&
380 !string_enum_compare(req_info[i].name, name, namelen))
381 return req_info[i].request;
383 return REQ_UNKNOWN;
384 }
387 /*
388 * Options
389 */
391 static const char usage[] =
392 "tig " VERSION " (" __DATE__ ")\n"
393 "\n"
394 "Usage: tig [options]\n"
395 " or: tig [options] [--] [git log options]\n"
396 " or: tig [options] log [git log options]\n"
397 " or: tig [options] diff [git diff options]\n"
398 " or: tig [options] show [git show options]\n"
399 " or: tig [options] < [git command output]\n"
400 "\n"
401 "Options:\n"
402 " -l Start up in log view\n"
403 " -d Start up in diff view\n"
404 " -S Start up in status view\n"
405 " -n[I], --line-number[=I] Show line numbers with given interval\n"
406 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
407 " -- Mark end of tig options\n"
408 " -v, --version Show version and exit\n"
409 " -h, --help Show help message and exit\n";
411 /* Option and state variables. */
412 static bool opt_line_number = FALSE;
413 static bool opt_rev_graph = FALSE;
414 static int opt_num_interval = NUMBER_INTERVAL;
415 static int opt_tab_size = TABSIZE;
416 static enum request opt_request = REQ_VIEW_MAIN;
417 static char opt_cmd[SIZEOF_STR] = "";
418 static char opt_path[SIZEOF_STR] = "";
419 static FILE *opt_pipe = NULL;
420 static char opt_encoding[20] = "UTF-8";
421 static bool opt_utf8 = TRUE;
422 static char opt_codeset[20] = "UTF-8";
423 static iconv_t opt_iconv = ICONV_NONE;
424 static char opt_search[SIZEOF_STR] = "";
425 static char opt_cdup[SIZEOF_STR] = "";
426 static char opt_git_dir[SIZEOF_STR] = "";
428 enum option_type {
429 OPT_NONE,
430 OPT_INT,
431 };
433 static bool
434 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
435 {
436 va_list args;
437 char *value = "";
438 int *number;
440 if (opt[0] != '-')
441 return FALSE;
443 if (opt[1] == '-') {
444 int namelen = strlen(name);
446 opt += 2;
448 if (strncmp(opt, name, namelen))
449 return FALSE;
451 if (opt[namelen] == '=')
452 value = opt + namelen + 1;
454 } else {
455 if (!short_name || opt[1] != short_name)
456 return FALSE;
457 value = opt + 2;
458 }
460 va_start(args, type);
461 if (type == OPT_INT) {
462 number = va_arg(args, int *);
463 if (isdigit(*value))
464 *number = atoi(value);
465 }
466 va_end(args);
468 return TRUE;
469 }
471 /* Returns the index of log or diff command or -1 to exit. */
472 static bool
473 parse_options(int argc, char *argv[])
474 {
475 int i;
477 for (i = 1; i < argc; i++) {
478 char *opt = argv[i];
480 if (!strcmp(opt, "log") ||
481 !strcmp(opt, "diff") ||
482 !strcmp(opt, "show")) {
483 opt_request = opt[0] == 'l'
484 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
485 break;
486 }
488 if (opt[0] && opt[0] != '-')
489 break;
491 if (!strcmp(opt, "-l")) {
492 opt_request = REQ_VIEW_LOG;
493 continue;
494 }
496 if (!strcmp(opt, "-d")) {
497 opt_request = REQ_VIEW_DIFF;
498 continue;
499 }
501 if (!strcmp(opt, "-S")) {
502 opt_request = REQ_VIEW_STATUS;
503 break;
504 }
506 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
507 opt_line_number = TRUE;
508 continue;
509 }
511 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
512 opt_tab_size = MIN(opt_tab_size, TABSIZE);
513 continue;
514 }
516 if (check_option(opt, 'v', "version", OPT_NONE)) {
517 printf("tig version %s\n", VERSION);
518 return FALSE;
519 }
521 if (check_option(opt, 'h', "help", OPT_NONE)) {
522 printf(usage);
523 return FALSE;
524 }
526 if (!strcmp(opt, "--")) {
527 i++;
528 break;
529 }
531 die("unknown option '%s'\n\n%s", opt, usage);
532 }
534 if (!isatty(STDIN_FILENO)) {
535 opt_request = REQ_VIEW_PAGER;
536 opt_pipe = stdin;
538 } else if (i < argc) {
539 size_t buf_size;
541 if (opt_request == REQ_VIEW_MAIN)
542 /* XXX: This is vulnerable to the user overriding
543 * options required for the main view parser. */
544 string_copy(opt_cmd, "git log --pretty=raw");
545 else
546 string_copy(opt_cmd, "git");
547 buf_size = strlen(opt_cmd);
549 while (buf_size < sizeof(opt_cmd) && i < argc) {
550 opt_cmd[buf_size++] = ' ';
551 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
552 }
554 if (buf_size >= sizeof(opt_cmd))
555 die("command too long");
557 opt_cmd[buf_size] = 0;
558 }
560 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
561 opt_utf8 = FALSE;
563 return TRUE;
564 }
567 /*
568 * Line-oriented content detection.
569 */
571 #define LINE_INFO \
572 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
573 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
574 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
575 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
576 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
577 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
578 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
579 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
580 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
581 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
582 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
583 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
584 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
585 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
586 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
587 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
588 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
589 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
590 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
591 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
592 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
593 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
594 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
595 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
596 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
597 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
598 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
599 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
600 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
601 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
602 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
603 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
604 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
605 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
606 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
607 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
608 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
609 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
610 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
611 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
612 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
613 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
614 LINE(STAT_SECTION, "", COLOR_DEFAULT, COLOR_BLUE, A_BOLD), \
615 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
616 LINE(STAT_STAGED, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
617 LINE(STAT_UNSTAGED,"", COLOR_YELLOW, COLOR_DEFAULT, 0), \
618 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0)
620 enum line_type {
621 #define LINE(type, line, fg, bg, attr) \
622 LINE_##type
623 LINE_INFO
624 #undef LINE
625 };
627 struct line_info {
628 const char *name; /* Option name. */
629 int namelen; /* Size of option name. */
630 const char *line; /* The start of line to match. */
631 int linelen; /* Size of string to match. */
632 int fg, bg, attr; /* Color and text attributes for the lines. */
633 };
635 static struct line_info line_info[] = {
636 #define LINE(type, line, fg, bg, attr) \
637 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
638 LINE_INFO
639 #undef LINE
640 };
642 static enum line_type
643 get_line_type(char *line)
644 {
645 int linelen = strlen(line);
646 enum line_type type;
648 for (type = 0; type < ARRAY_SIZE(line_info); type++)
649 /* Case insensitive search matches Signed-off-by lines better. */
650 if (linelen >= line_info[type].linelen &&
651 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
652 return type;
654 return LINE_DEFAULT;
655 }
657 static inline int
658 get_line_attr(enum line_type type)
659 {
660 assert(type < ARRAY_SIZE(line_info));
661 return COLOR_PAIR(type) | line_info[type].attr;
662 }
664 static struct line_info *
665 get_line_info(char *name, int namelen)
666 {
667 enum line_type type;
669 for (type = 0; type < ARRAY_SIZE(line_info); type++)
670 if (namelen == line_info[type].namelen &&
671 !string_enum_compare(line_info[type].name, name, namelen))
672 return &line_info[type];
674 return NULL;
675 }
677 static void
678 init_colors(void)
679 {
680 int default_bg = COLOR_BLACK;
681 int default_fg = COLOR_WHITE;
682 enum line_type type;
684 start_color();
686 if (use_default_colors() != ERR) {
687 default_bg = -1;
688 default_fg = -1;
689 }
691 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
692 struct line_info *info = &line_info[type];
693 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
694 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
696 init_pair(type, fg, bg);
697 }
698 }
700 struct line {
701 enum line_type type;
703 /* State flags */
704 unsigned int selected:1;
706 void *data; /* User data */
707 };
710 /*
711 * Keys
712 */
714 struct keybinding {
715 int alias;
716 enum request request;
717 struct keybinding *next;
718 };
720 static struct keybinding default_keybindings[] = {
721 /* View switching */
722 { 'm', REQ_VIEW_MAIN },
723 { 'd', REQ_VIEW_DIFF },
724 { 'l', REQ_VIEW_LOG },
725 { 't', REQ_VIEW_TREE },
726 { 'f', REQ_VIEW_BLOB },
727 { 'p', REQ_VIEW_PAGER },
728 { 'h', REQ_VIEW_HELP },
729 { 'S', REQ_VIEW_STATUS },
731 /* View manipulation */
732 { 'q', REQ_VIEW_CLOSE },
733 { KEY_TAB, REQ_VIEW_NEXT },
734 { KEY_RETURN, REQ_ENTER },
735 { KEY_UP, REQ_PREVIOUS },
736 { KEY_DOWN, REQ_NEXT },
738 /* Cursor navigation */
739 { 'k', REQ_MOVE_UP },
740 { 'j', REQ_MOVE_DOWN },
741 { KEY_HOME, REQ_MOVE_FIRST_LINE },
742 { KEY_END, REQ_MOVE_LAST_LINE },
743 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
744 { ' ', REQ_MOVE_PAGE_DOWN },
745 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
746 { 'b', REQ_MOVE_PAGE_UP },
747 { '-', REQ_MOVE_PAGE_UP },
749 /* Scrolling */
750 { KEY_IC, REQ_SCROLL_LINE_UP },
751 { KEY_DC, REQ_SCROLL_LINE_DOWN },
752 { 'w', REQ_SCROLL_PAGE_UP },
753 { 's', REQ_SCROLL_PAGE_DOWN },
755 /* Searching */
756 { '/', REQ_SEARCH },
757 { '?', REQ_SEARCH_BACK },
758 { 'n', REQ_FIND_NEXT },
759 { 'N', REQ_FIND_PREV },
761 /* Misc */
762 { 'Q', REQ_QUIT },
763 { 'z', REQ_STOP_LOADING },
764 { 'v', REQ_SHOW_VERSION },
765 { 'r', REQ_SCREEN_REDRAW },
766 { '.', REQ_TOGGLE_LINENO },
767 { 'g', REQ_TOGGLE_REV_GRAPH },
768 { ':', REQ_PROMPT },
769 { 'u', REQ_STATUS_UPDATE },
771 /* Using the ncurses SIGWINCH handler. */
772 { KEY_RESIZE, REQ_SCREEN_RESIZE },
773 };
775 #define KEYMAP_INFO \
776 KEYMAP_(GENERIC), \
777 KEYMAP_(MAIN), \
778 KEYMAP_(DIFF), \
779 KEYMAP_(LOG), \
780 KEYMAP_(TREE), \
781 KEYMAP_(BLOB), \
782 KEYMAP_(PAGER), \
783 KEYMAP_(HELP), \
784 KEYMAP_(STATUS)
786 enum keymap {
787 #define KEYMAP_(name) KEYMAP_##name
788 KEYMAP_INFO
789 #undef KEYMAP_
790 };
792 static struct int_map keymap_table[] = {
793 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
794 KEYMAP_INFO
795 #undef KEYMAP_
796 };
798 #define set_keymap(map, name) \
799 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
801 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
803 static void
804 add_keybinding(enum keymap keymap, enum request request, int key)
805 {
806 struct keybinding *keybinding;
808 keybinding = calloc(1, sizeof(*keybinding));
809 if (!keybinding)
810 die("Failed to allocate keybinding");
812 keybinding->alias = key;
813 keybinding->request = request;
814 keybinding->next = keybindings[keymap];
815 keybindings[keymap] = keybinding;
816 }
818 /* Looks for a key binding first in the given map, then in the generic map, and
819 * lastly in the default keybindings. */
820 static enum request
821 get_keybinding(enum keymap keymap, int key)
822 {
823 struct keybinding *kbd;
824 int i;
826 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
827 if (kbd->alias == key)
828 return kbd->request;
830 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
831 if (kbd->alias == key)
832 return kbd->request;
834 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
835 if (default_keybindings[i].alias == key)
836 return default_keybindings[i].request;
838 return (enum request) key;
839 }
842 struct key {
843 char *name;
844 int value;
845 };
847 static struct key key_table[] = {
848 { "Enter", KEY_RETURN },
849 { "Space", ' ' },
850 { "Backspace", KEY_BACKSPACE },
851 { "Tab", KEY_TAB },
852 { "Escape", KEY_ESC },
853 { "Left", KEY_LEFT },
854 { "Right", KEY_RIGHT },
855 { "Up", KEY_UP },
856 { "Down", KEY_DOWN },
857 { "Insert", KEY_IC },
858 { "Delete", KEY_DC },
859 { "Hash", '#' },
860 { "Home", KEY_HOME },
861 { "End", KEY_END },
862 { "PageUp", KEY_PPAGE },
863 { "PageDown", KEY_NPAGE },
864 { "F1", KEY_F(1) },
865 { "F2", KEY_F(2) },
866 { "F3", KEY_F(3) },
867 { "F4", KEY_F(4) },
868 { "F5", KEY_F(5) },
869 { "F6", KEY_F(6) },
870 { "F7", KEY_F(7) },
871 { "F8", KEY_F(8) },
872 { "F9", KEY_F(9) },
873 { "F10", KEY_F(10) },
874 { "F11", KEY_F(11) },
875 { "F12", KEY_F(12) },
876 };
878 static int
879 get_key_value(const char *name)
880 {
881 int i;
883 for (i = 0; i < ARRAY_SIZE(key_table); i++)
884 if (!strcasecmp(key_table[i].name, name))
885 return key_table[i].value;
887 if (strlen(name) == 1 && isprint(*name))
888 return (int) *name;
890 return ERR;
891 }
893 static char *
894 get_key(enum request request)
895 {
896 static char buf[BUFSIZ];
897 static char key_char[] = "'X'";
898 size_t pos = 0;
899 char *sep = "";
900 int i;
902 buf[pos] = 0;
904 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
905 struct keybinding *keybinding = &default_keybindings[i];
906 char *seq = NULL;
907 int key;
909 if (keybinding->request != request)
910 continue;
912 for (key = 0; key < ARRAY_SIZE(key_table); key++)
913 if (key_table[key].value == keybinding->alias)
914 seq = key_table[key].name;
916 if (seq == NULL &&
917 keybinding->alias < 127 &&
918 isprint(keybinding->alias)) {
919 key_char[1] = (char) keybinding->alias;
920 seq = key_char;
921 }
923 if (!seq)
924 seq = "'?'";
926 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
927 return "Too many keybindings!";
928 sep = ", ";
929 }
931 return buf;
932 }
935 /*
936 * User config file handling.
937 */
939 static struct int_map color_map[] = {
940 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
941 COLOR_MAP(DEFAULT),
942 COLOR_MAP(BLACK),
943 COLOR_MAP(BLUE),
944 COLOR_MAP(CYAN),
945 COLOR_MAP(GREEN),
946 COLOR_MAP(MAGENTA),
947 COLOR_MAP(RED),
948 COLOR_MAP(WHITE),
949 COLOR_MAP(YELLOW),
950 };
952 #define set_color(color, name) \
953 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
955 static struct int_map attr_map[] = {
956 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
957 ATTR_MAP(NORMAL),
958 ATTR_MAP(BLINK),
959 ATTR_MAP(BOLD),
960 ATTR_MAP(DIM),
961 ATTR_MAP(REVERSE),
962 ATTR_MAP(STANDOUT),
963 ATTR_MAP(UNDERLINE),
964 };
966 #define set_attribute(attr, name) \
967 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
969 static int config_lineno;
970 static bool config_errors;
971 static char *config_msg;
973 /* Wants: object fgcolor bgcolor [attr] */
974 static int
975 option_color_command(int argc, char *argv[])
976 {
977 struct line_info *info;
979 if (argc != 3 && argc != 4) {
980 config_msg = "Wrong number of arguments given to color command";
981 return ERR;
982 }
984 info = get_line_info(argv[0], strlen(argv[0]));
985 if (!info) {
986 config_msg = "Unknown color name";
987 return ERR;
988 }
990 if (set_color(&info->fg, argv[1]) == ERR ||
991 set_color(&info->bg, argv[2]) == ERR) {
992 config_msg = "Unknown color";
993 return ERR;
994 }
996 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
997 config_msg = "Unknown attribute";
998 return ERR;
999 }
1001 return OK;
1002 }
1004 /* Wants: name = value */
1005 static int
1006 option_set_command(int argc, char *argv[])
1007 {
1008 if (argc != 3) {
1009 config_msg = "Wrong number of arguments given to set command";
1010 return ERR;
1011 }
1013 if (strcmp(argv[1], "=")) {
1014 config_msg = "No value assigned";
1015 return ERR;
1016 }
1018 if (!strcmp(argv[0], "show-rev-graph")) {
1019 opt_rev_graph = (!strcmp(argv[2], "1") ||
1020 !strcmp(argv[2], "true") ||
1021 !strcmp(argv[2], "yes"));
1022 return OK;
1023 }
1025 if (!strcmp(argv[0], "line-number-interval")) {
1026 opt_num_interval = atoi(argv[2]);
1027 return OK;
1028 }
1030 if (!strcmp(argv[0], "tab-size")) {
1031 opt_tab_size = atoi(argv[2]);
1032 return OK;
1033 }
1035 if (!strcmp(argv[0], "commit-encoding")) {
1036 char *arg = argv[2];
1037 int delimiter = *arg;
1038 int i;
1040 switch (delimiter) {
1041 case '"':
1042 case '\'':
1043 for (arg++, i = 0; arg[i]; i++)
1044 if (arg[i] == delimiter) {
1045 arg[i] = 0;
1046 break;
1047 }
1048 default:
1049 string_ncopy(opt_encoding, arg, strlen(arg));
1050 return OK;
1051 }
1052 }
1054 config_msg = "Unknown variable name";
1055 return ERR;
1056 }
1058 /* Wants: mode request key */
1059 static int
1060 option_bind_command(int argc, char *argv[])
1061 {
1062 enum request request;
1063 int keymap;
1064 int key;
1066 if (argc != 3) {
1067 config_msg = "Wrong number of arguments given to bind command";
1068 return ERR;
1069 }
1071 if (set_keymap(&keymap, argv[0]) == ERR) {
1072 config_msg = "Unknown key map";
1073 return ERR;
1074 }
1076 key = get_key_value(argv[1]);
1077 if (key == ERR) {
1078 config_msg = "Unknown key";
1079 return ERR;
1080 }
1082 request = get_request(argv[2]);
1083 if (request == REQ_UNKNOWN) {
1084 config_msg = "Unknown request name";
1085 return ERR;
1086 }
1088 add_keybinding(keymap, request, key);
1090 return OK;
1091 }
1093 static int
1094 set_option(char *opt, char *value)
1095 {
1096 char *argv[16];
1097 int valuelen;
1098 int argc = 0;
1100 /* Tokenize */
1101 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1102 argv[argc++] = value;
1104 value += valuelen;
1105 if (!*value)
1106 break;
1108 *value++ = 0;
1109 while (isspace(*value))
1110 value++;
1111 }
1113 if (!strcmp(opt, "color"))
1114 return option_color_command(argc, argv);
1116 if (!strcmp(opt, "set"))
1117 return option_set_command(argc, argv);
1119 if (!strcmp(opt, "bind"))
1120 return option_bind_command(argc, argv);
1122 config_msg = "Unknown option command";
1123 return ERR;
1124 }
1126 static int
1127 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1128 {
1129 int status = OK;
1131 config_lineno++;
1132 config_msg = "Internal error";
1134 /* Check for comment markers, since read_properties() will
1135 * only ensure opt and value are split at first " \t". */
1136 optlen = strcspn(opt, "#");
1137 if (optlen == 0)
1138 return OK;
1140 if (opt[optlen] != 0) {
1141 config_msg = "No option value";
1142 status = ERR;
1144 } else {
1145 /* Look for comment endings in the value. */
1146 size_t len = strcspn(value, "#");
1148 if (len < valuelen) {
1149 valuelen = len;
1150 value[valuelen] = 0;
1151 }
1153 status = set_option(opt, value);
1154 }
1156 if (status == ERR) {
1157 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1158 config_lineno, (int) optlen, opt, config_msg);
1159 config_errors = TRUE;
1160 }
1162 /* Always keep going if errors are encountered. */
1163 return OK;
1164 }
1166 static int
1167 load_options(void)
1168 {
1169 char *home = getenv("HOME");
1170 char buf[SIZEOF_STR];
1171 FILE *file;
1173 config_lineno = 0;
1174 config_errors = FALSE;
1176 if (!home || !string_format(buf, "%s/.tigrc", home))
1177 return ERR;
1179 /* It's ok that the file doesn't exist. */
1180 file = fopen(buf, "r");
1181 if (!file)
1182 return OK;
1184 if (read_properties(file, " \t", read_option) == ERR ||
1185 config_errors == TRUE)
1186 fprintf(stderr, "Errors while loading %s.\n", buf);
1188 return OK;
1189 }
1192 /*
1193 * The viewer
1194 */
1196 struct view;
1197 struct view_ops;
1199 /* The display array of active views and the index of the current view. */
1200 static struct view *display[2];
1201 static unsigned int current_view;
1203 /* Reading from the prompt? */
1204 static bool input_mode = FALSE;
1206 #define foreach_displayed_view(view, i) \
1207 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1209 #define displayed_views() (display[1] != NULL ? 2 : 1)
1211 /* Current head and commit ID */
1212 static char ref_blob[SIZEOF_REF] = "";
1213 static char ref_commit[SIZEOF_REF] = "HEAD";
1214 static char ref_head[SIZEOF_REF] = "HEAD";
1216 struct view {
1217 const char *name; /* View name */
1218 const char *cmd_fmt; /* Default command line format */
1219 const char *cmd_env; /* Command line set via environment */
1220 const char *id; /* Points to either of ref_{head,commit,blob} */
1222 struct view_ops *ops; /* View operations */
1224 enum keymap keymap; /* What keymap does this view have */
1226 char cmd[SIZEOF_STR]; /* Command buffer */
1227 char ref[SIZEOF_REF]; /* Hovered commit reference */
1228 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1230 int height, width; /* The width and height of the main window */
1231 WINDOW *win; /* The main window */
1232 WINDOW *title; /* The title window living below the main window */
1234 /* Navigation */
1235 unsigned long offset; /* Offset of the window top */
1236 unsigned long lineno; /* Current line number */
1238 /* Searching */
1239 char grep[SIZEOF_STR]; /* Search string */
1240 regex_t *regex; /* Pre-compiled regex */
1242 /* If non-NULL, points to the view that opened this view. If this view
1243 * is closed tig will switch back to the parent view. */
1244 struct view *parent;
1246 /* Buffering */
1247 unsigned long lines; /* Total number of lines */
1248 struct line *line; /* Line index */
1249 unsigned long line_size;/* Total number of allocated lines */
1250 unsigned int digits; /* Number of digits in the lines member. */
1252 /* Loading */
1253 FILE *pipe;
1254 time_t start_time;
1255 };
1257 struct view_ops {
1258 /* What type of content being displayed. Used in the title bar. */
1259 const char *type;
1260 /* Open and reads in all view content. */
1261 bool (*open)(struct view *view);
1262 /* Read one line; updates view->line. */
1263 bool (*read)(struct view *view, char *data);
1264 /* Draw one line; @lineno must be < view->height. */
1265 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1266 /* Depending on view, change display based on current line. */
1267 bool (*enter)(struct view *view, struct line *line);
1268 /* Search for regex in a line. */
1269 bool (*grep)(struct view *view, struct line *line);
1270 /* Select line */
1271 void (*select)(struct view *view, struct line *line);
1272 };
1274 static struct view_ops pager_ops;
1275 static struct view_ops main_ops;
1276 static struct view_ops tree_ops;
1277 static struct view_ops blob_ops;
1278 static struct view_ops help_ops;
1279 static struct view_ops status_ops;
1281 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1282 { name, cmd, #env, ref, ops, map}
1284 #define VIEW_(id, name, ops, ref) \
1285 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1288 static struct view views[] = {
1289 VIEW_(MAIN, "main", &main_ops, ref_head),
1290 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1291 VIEW_(LOG, "log", &pager_ops, ref_head),
1292 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1293 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1294 VIEW_(HELP, "help", &help_ops, ""),
1295 VIEW_(PAGER, "pager", &pager_ops, "stdin"),
1296 VIEW_(STATUS, "status", &status_ops, ""),
1297 };
1299 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1301 #define foreach_view(view, i) \
1302 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1304 #define view_is_displayed(view) \
1305 (view == display[0] || view == display[1])
1307 static bool
1308 draw_view_line(struct view *view, unsigned int lineno)
1309 {
1310 struct line *line;
1311 bool selected = (view->offset + lineno == view->lineno);
1312 bool draw_ok;
1314 assert(view_is_displayed(view));
1316 if (view->offset + lineno >= view->lines)
1317 return FALSE;
1319 line = &view->line[view->offset + lineno];
1321 if (selected) {
1322 line->selected = TRUE;
1323 view->ops->select(view, line);
1324 } else if (line->selected) {
1325 line->selected = FALSE;
1326 wmove(view->win, lineno, 0);
1327 wclrtoeol(view->win);
1328 }
1330 scrollok(view->win, FALSE);
1331 draw_ok = view->ops->draw(view, line, lineno, selected);
1332 scrollok(view->win, TRUE);
1334 return draw_ok;
1335 }
1337 static void
1338 redraw_view_from(struct view *view, int lineno)
1339 {
1340 assert(0 <= lineno && lineno < view->height);
1342 for (; lineno < view->height; lineno++) {
1343 if (!draw_view_line(view, lineno))
1344 break;
1345 }
1347 redrawwin(view->win);
1348 if (input_mode)
1349 wnoutrefresh(view->win);
1350 else
1351 wrefresh(view->win);
1352 }
1354 static void
1355 redraw_view(struct view *view)
1356 {
1357 wclear(view->win);
1358 redraw_view_from(view, 0);
1359 }
1362 static void
1363 update_view_title(struct view *view)
1364 {
1365 char buf[SIZEOF_STR];
1366 char state[SIZEOF_STR];
1367 size_t bufpos = 0, statelen = 0;
1369 assert(view_is_displayed(view));
1371 if (view->lines || view->pipe) {
1372 unsigned int view_lines = view->offset + view->height;
1373 unsigned int lines = view->lines
1374 ? MIN(view_lines, view->lines) * 100 / view->lines
1375 : 0;
1377 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1378 view->ops->type,
1379 view->lineno + 1,
1380 view->lines,
1381 lines);
1383 if (view->pipe) {
1384 time_t secs = time(NULL) - view->start_time;
1386 /* Three git seconds are a long time ... */
1387 if (secs > 2)
1388 string_format_from(state, &statelen, " %lds", secs);
1389 }
1390 }
1392 string_format_from(buf, &bufpos, "[%s]", view->name);
1393 if (*view->ref && bufpos < view->width) {
1394 size_t refsize = strlen(view->ref);
1395 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1397 if (minsize < view->width)
1398 refsize = view->width - minsize + 7;
1399 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1400 }
1402 if (statelen && bufpos < view->width) {
1403 string_format_from(buf, &bufpos, " %s", state);
1404 }
1406 if (view == display[current_view])
1407 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1408 else
1409 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1411 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1412 wclrtoeol(view->title);
1413 wmove(view->title, 0, view->width - 1);
1415 if (input_mode)
1416 wnoutrefresh(view->title);
1417 else
1418 wrefresh(view->title);
1419 }
1421 static void
1422 resize_display(void)
1423 {
1424 int offset, i;
1425 struct view *base = display[0];
1426 struct view *view = display[1] ? display[1] : display[0];
1428 /* Setup window dimensions */
1430 getmaxyx(stdscr, base->height, base->width);
1432 /* Make room for the status window. */
1433 base->height -= 1;
1435 if (view != base) {
1436 /* Horizontal split. */
1437 view->width = base->width;
1438 view->height = SCALE_SPLIT_VIEW(base->height);
1439 base->height -= view->height;
1441 /* Make room for the title bar. */
1442 view->height -= 1;
1443 }
1445 /* Make room for the title bar. */
1446 base->height -= 1;
1448 offset = 0;
1450 foreach_displayed_view (view, i) {
1451 if (!view->win) {
1452 view->win = newwin(view->height, 0, offset, 0);
1453 if (!view->win)
1454 die("Failed to create %s view", view->name);
1456 scrollok(view->win, TRUE);
1458 view->title = newwin(1, 0, offset + view->height, 0);
1459 if (!view->title)
1460 die("Failed to create title window");
1462 } else {
1463 wresize(view->win, view->height, view->width);
1464 mvwin(view->win, offset, 0);
1465 mvwin(view->title, offset + view->height, 0);
1466 }
1468 offset += view->height + 1;
1469 }
1470 }
1472 static void
1473 redraw_display(void)
1474 {
1475 struct view *view;
1476 int i;
1478 foreach_displayed_view (view, i) {
1479 redraw_view(view);
1480 update_view_title(view);
1481 }
1482 }
1484 static void
1485 update_display_cursor(struct view *view)
1486 {
1487 /* Move the cursor to the right-most column of the cursor line.
1488 *
1489 * XXX: This could turn out to be a bit expensive, but it ensures that
1490 * the cursor does not jump around. */
1491 if (view->lines) {
1492 wmove(view->win, view->lineno - view->offset, view->width - 1);
1493 wrefresh(view->win);
1494 }
1495 }
1497 /*
1498 * Navigation
1499 */
1501 /* Scrolling backend */
1502 static void
1503 do_scroll_view(struct view *view, int lines)
1504 {
1505 bool redraw_current_line = FALSE;
1507 /* The rendering expects the new offset. */
1508 view->offset += lines;
1510 assert(0 <= view->offset && view->offset < view->lines);
1511 assert(lines);
1513 /* Move current line into the view. */
1514 if (view->lineno < view->offset) {
1515 view->lineno = view->offset;
1516 redraw_current_line = TRUE;
1517 } else if (view->lineno >= view->offset + view->height) {
1518 view->lineno = view->offset + view->height - 1;
1519 redraw_current_line = TRUE;
1520 }
1522 assert(view->offset <= view->lineno && view->lineno < view->lines);
1524 /* Redraw the whole screen if scrolling is pointless. */
1525 if (view->height < ABS(lines)) {
1526 redraw_view(view);
1528 } else {
1529 int line = lines > 0 ? view->height - lines : 0;
1530 int end = line + ABS(lines);
1532 wscrl(view->win, lines);
1534 for (; line < end; line++) {
1535 if (!draw_view_line(view, line))
1536 break;
1537 }
1539 if (redraw_current_line)
1540 draw_view_line(view, view->lineno - view->offset);
1541 }
1543 redrawwin(view->win);
1544 wrefresh(view->win);
1545 report("");
1546 }
1548 /* Scroll frontend */
1549 static void
1550 scroll_view(struct view *view, enum request request)
1551 {
1552 int lines = 1;
1554 assert(view_is_displayed(view));
1556 switch (request) {
1557 case REQ_SCROLL_PAGE_DOWN:
1558 lines = view->height;
1559 case REQ_SCROLL_LINE_DOWN:
1560 if (view->offset + lines > view->lines)
1561 lines = view->lines - view->offset;
1563 if (lines == 0 || view->offset + view->height >= view->lines) {
1564 report("Cannot scroll beyond the last line");
1565 return;
1566 }
1567 break;
1569 case REQ_SCROLL_PAGE_UP:
1570 lines = view->height;
1571 case REQ_SCROLL_LINE_UP:
1572 if (lines > view->offset)
1573 lines = view->offset;
1575 if (lines == 0) {
1576 report("Cannot scroll beyond the first line");
1577 return;
1578 }
1580 lines = -lines;
1581 break;
1583 default:
1584 die("request %d not handled in switch", request);
1585 }
1587 do_scroll_view(view, lines);
1588 }
1590 /* Cursor moving */
1591 static void
1592 move_view(struct view *view, enum request request)
1593 {
1594 int scroll_steps = 0;
1595 int steps;
1597 switch (request) {
1598 case REQ_MOVE_FIRST_LINE:
1599 steps = -view->lineno;
1600 break;
1602 case REQ_MOVE_LAST_LINE:
1603 steps = view->lines - view->lineno - 1;
1604 break;
1606 case REQ_MOVE_PAGE_UP:
1607 steps = view->height > view->lineno
1608 ? -view->lineno : -view->height;
1609 break;
1611 case REQ_MOVE_PAGE_DOWN:
1612 steps = view->lineno + view->height >= view->lines
1613 ? view->lines - view->lineno - 1 : view->height;
1614 break;
1616 case REQ_MOVE_UP:
1617 steps = -1;
1618 break;
1620 case REQ_MOVE_DOWN:
1621 steps = 1;
1622 break;
1624 default:
1625 die("request %d not handled in switch", request);
1626 }
1628 if (steps <= 0 && view->lineno == 0) {
1629 report("Cannot move beyond the first line");
1630 return;
1632 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1633 report("Cannot move beyond the last line");
1634 return;
1635 }
1637 /* Move the current line */
1638 view->lineno += steps;
1639 assert(0 <= view->lineno && view->lineno < view->lines);
1641 /* Check whether the view needs to be scrolled */
1642 if (view->lineno < view->offset ||
1643 view->lineno >= view->offset + view->height) {
1644 scroll_steps = steps;
1645 if (steps < 0 && -steps > view->offset) {
1646 scroll_steps = -view->offset;
1648 } else if (steps > 0) {
1649 if (view->lineno == view->lines - 1 &&
1650 view->lines > view->height) {
1651 scroll_steps = view->lines - view->offset - 1;
1652 if (scroll_steps >= view->height)
1653 scroll_steps -= view->height - 1;
1654 }
1655 }
1656 }
1658 if (!view_is_displayed(view)) {
1659 view->offset += scroll_steps;
1660 assert(0 <= view->offset && view->offset < view->lines);
1661 view->ops->select(view, &view->line[view->lineno]);
1662 return;
1663 }
1665 /* Repaint the old "current" line if we be scrolling */
1666 if (ABS(steps) < view->height)
1667 draw_view_line(view, view->lineno - steps - view->offset);
1669 if (scroll_steps) {
1670 do_scroll_view(view, scroll_steps);
1671 return;
1672 }
1674 /* Draw the current line */
1675 draw_view_line(view, view->lineno - view->offset);
1677 redrawwin(view->win);
1678 wrefresh(view->win);
1679 report("");
1680 }
1683 /*
1684 * Searching
1685 */
1687 static void search_view(struct view *view, enum request request);
1689 static bool
1690 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1691 {
1692 assert(view_is_displayed(view));
1694 if (!view->ops->grep(view, line))
1695 return FALSE;
1697 if (lineno - view->offset >= view->height) {
1698 view->offset = lineno;
1699 view->lineno = lineno;
1700 redraw_view(view);
1702 } else {
1703 unsigned long old_lineno = view->lineno - view->offset;
1705 view->lineno = lineno;
1706 draw_view_line(view, old_lineno);
1708 draw_view_line(view, view->lineno - view->offset);
1709 redrawwin(view->win);
1710 wrefresh(view->win);
1711 }
1713 report("Line %ld matches '%s'", lineno + 1, view->grep);
1714 return TRUE;
1715 }
1717 static void
1718 find_next(struct view *view, enum request request)
1719 {
1720 unsigned long lineno = view->lineno;
1721 int direction;
1723 if (!*view->grep) {
1724 if (!*opt_search)
1725 report("No previous search");
1726 else
1727 search_view(view, request);
1728 return;
1729 }
1731 switch (request) {
1732 case REQ_SEARCH:
1733 case REQ_FIND_NEXT:
1734 direction = 1;
1735 break;
1737 case REQ_SEARCH_BACK:
1738 case REQ_FIND_PREV:
1739 direction = -1;
1740 break;
1742 default:
1743 return;
1744 }
1746 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1747 lineno += direction;
1749 /* Note, lineno is unsigned long so will wrap around in which case it
1750 * will become bigger than view->lines. */
1751 for (; lineno < view->lines; lineno += direction) {
1752 struct line *line = &view->line[lineno];
1754 if (find_next_line(view, lineno, line))
1755 return;
1756 }
1758 report("No match found for '%s'", view->grep);
1759 }
1761 static void
1762 search_view(struct view *view, enum request request)
1763 {
1764 int regex_err;
1766 if (view->regex) {
1767 regfree(view->regex);
1768 *view->grep = 0;
1769 } else {
1770 view->regex = calloc(1, sizeof(*view->regex));
1771 if (!view->regex)
1772 return;
1773 }
1775 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1776 if (regex_err != 0) {
1777 char buf[SIZEOF_STR] = "unknown error";
1779 regerror(regex_err, view->regex, buf, sizeof(buf));
1780 report("Search failed: %s", buf);
1781 return;
1782 }
1784 string_copy(view->grep, opt_search);
1786 find_next(view, request);
1787 }
1789 /*
1790 * Incremental updating
1791 */
1793 static void
1794 end_update(struct view *view)
1795 {
1796 if (!view->pipe)
1797 return;
1798 set_nonblocking_input(FALSE);
1799 if (view->pipe == stdin)
1800 fclose(view->pipe);
1801 else
1802 pclose(view->pipe);
1803 view->pipe = NULL;
1804 }
1806 static bool
1807 begin_update(struct view *view)
1808 {
1809 if (view->pipe)
1810 end_update(view);
1812 if (opt_cmd[0]) {
1813 string_copy(view->cmd, opt_cmd);
1814 opt_cmd[0] = 0;
1815 /* When running random commands, initially show the
1816 * command in the title. However, it maybe later be
1817 * overwritten if a commit line is selected. */
1818 string_copy(view->ref, view->cmd);
1820 } else if (view == VIEW(REQ_VIEW_TREE)) {
1821 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1822 char path[SIZEOF_STR];
1824 if (strcmp(view->vid, view->id))
1825 opt_path[0] = path[0] = 0;
1826 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
1827 return FALSE;
1829 if (!string_format(view->cmd, format, view->id, path))
1830 return FALSE;
1832 } else {
1833 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1834 const char *id = view->id;
1836 if (!string_format(view->cmd, format, id, id, id, id, id))
1837 return FALSE;
1839 /* Put the current ref_* value to the view title ref
1840 * member. This is needed by the blob view. Most other
1841 * views sets it automatically after loading because the
1842 * first line is a commit line. */
1843 string_copy_rev(view->ref, view->id);
1844 }
1846 /* Special case for the pager view. */
1847 if (opt_pipe) {
1848 view->pipe = opt_pipe;
1849 opt_pipe = NULL;
1850 } else {
1851 view->pipe = popen(view->cmd, "r");
1852 }
1854 if (!view->pipe)
1855 return FALSE;
1857 set_nonblocking_input(TRUE);
1859 view->offset = 0;
1860 view->lines = 0;
1861 view->lineno = 0;
1862 string_copy_rev(view->vid, view->id);
1864 if (view->line) {
1865 int i;
1867 for (i = 0; i < view->lines; i++)
1868 if (view->line[i].data)
1869 free(view->line[i].data);
1871 free(view->line);
1872 view->line = NULL;
1873 }
1875 view->start_time = time(NULL);
1877 return TRUE;
1878 }
1880 static struct line *
1881 realloc_lines(struct view *view, size_t line_size)
1882 {
1883 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1885 if (!tmp)
1886 return NULL;
1888 view->line = tmp;
1889 view->line_size = line_size;
1890 return view->line;
1891 }
1893 static bool
1894 update_view(struct view *view)
1895 {
1896 char in_buffer[BUFSIZ];
1897 char out_buffer[BUFSIZ * 2];
1898 char *line;
1899 /* The number of lines to read. If too low it will cause too much
1900 * redrawing (and possible flickering), if too high responsiveness
1901 * will suffer. */
1902 unsigned long lines = view->height;
1903 int redraw_from = -1;
1905 if (!view->pipe)
1906 return TRUE;
1908 /* Only redraw if lines are visible. */
1909 if (view->offset + view->height >= view->lines)
1910 redraw_from = view->lines - view->offset;
1912 /* FIXME: This is probably not perfect for backgrounded views. */
1913 if (!realloc_lines(view, view->lines + lines))
1914 goto alloc_error;
1916 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1917 size_t linelen = strlen(line);
1919 if (linelen)
1920 line[linelen - 1] = 0;
1922 if (opt_iconv != ICONV_NONE) {
1923 char *inbuf = line;
1924 size_t inlen = linelen;
1926 char *outbuf = out_buffer;
1927 size_t outlen = sizeof(out_buffer);
1929 size_t ret;
1931 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1932 if (ret != (size_t) -1) {
1933 line = out_buffer;
1934 linelen = strlen(out_buffer);
1935 }
1936 }
1938 if (!view->ops->read(view, line))
1939 goto alloc_error;
1941 if (lines-- == 1)
1942 break;
1943 }
1945 {
1946 int digits;
1948 lines = view->lines;
1949 for (digits = 0; lines; digits++)
1950 lines /= 10;
1952 /* Keep the displayed view in sync with line number scaling. */
1953 if (digits != view->digits) {
1954 view->digits = digits;
1955 redraw_from = 0;
1956 }
1957 }
1959 if (!view_is_displayed(view))
1960 goto check_pipe;
1962 if (view == VIEW(REQ_VIEW_TREE)) {
1963 /* Clear the view and redraw everything since the tree sorting
1964 * might have rearranged things. */
1965 redraw_view(view);
1967 } else if (redraw_from >= 0) {
1968 /* If this is an incremental update, redraw the previous line
1969 * since for commits some members could have changed when
1970 * loading the main view. */
1971 if (redraw_from > 0)
1972 redraw_from--;
1974 /* Since revision graph visualization requires knowledge
1975 * about the parent commit, it causes a further one-off
1976 * needed to be redrawn for incremental updates. */
1977 if (redraw_from > 0 && opt_rev_graph)
1978 redraw_from--;
1980 /* Incrementally draw avoids flickering. */
1981 redraw_view_from(view, redraw_from);
1982 }
1984 /* Update the title _after_ the redraw so that if the redraw picks up a
1985 * commit reference in view->ref it'll be available here. */
1986 update_view_title(view);
1988 check_pipe:
1989 if (ferror(view->pipe)) {
1990 report("Failed to read: %s", strerror(errno));
1991 goto end;
1993 } else if (feof(view->pipe)) {
1994 report("");
1995 goto end;
1996 }
1998 return TRUE;
2000 alloc_error:
2001 report("Allocation failure");
2003 end:
2004 view->ops->read(view, NULL);
2005 end_update(view);
2006 return FALSE;
2007 }
2009 static struct line *
2010 add_line_data(struct view *view, void *data, enum line_type type)
2011 {
2012 struct line *line = &view->line[view->lines++];
2014 memset(line, 0, sizeof(*line));
2015 line->type = type;
2016 line->data = data;
2018 return line;
2019 }
2021 static struct line *
2022 add_line_text(struct view *view, char *data, enum line_type type)
2023 {
2024 if (data)
2025 data = strdup(data);
2027 return data ? add_line_data(view, data, type) : NULL;
2028 }
2031 /*
2032 * View opening
2033 */
2035 enum open_flags {
2036 OPEN_DEFAULT = 0, /* Use default view switching. */
2037 OPEN_SPLIT = 1, /* Split current view. */
2038 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2039 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2040 };
2042 static void
2043 open_view(struct view *prev, enum request request, enum open_flags flags)
2044 {
2045 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2046 bool split = !!(flags & OPEN_SPLIT);
2047 bool reload = !!(flags & OPEN_RELOAD);
2048 struct view *view = VIEW(request);
2049 int nviews = displayed_views();
2050 struct view *base_view = display[0];
2052 if (view == prev && nviews == 1 && !reload) {
2053 report("Already in %s view", view->name);
2054 return;
2055 }
2057 if (view->ops->open) {
2058 if (!view->ops->open(view)) {
2059 report("Failed to load %s view", view->name);
2060 return;
2061 }
2063 } else if ((reload || strcmp(view->vid, view->id)) &&
2064 !begin_update(view)) {
2065 report("Failed to load %s view", view->name);
2066 return;
2067 }
2069 if (split) {
2070 display[1] = view;
2071 if (!backgrounded)
2072 current_view = 1;
2073 } else {
2074 /* Maximize the current view. */
2075 memset(display, 0, sizeof(display));
2076 current_view = 0;
2077 display[current_view] = view;
2078 }
2080 /* Resize the view when switching between split- and full-screen,
2081 * or when switching between two different full-screen views. */
2082 if (nviews != displayed_views() ||
2083 (nviews == 1 && base_view != display[0]))
2084 resize_display();
2086 if (split && prev->lineno - prev->offset >= prev->height) {
2087 /* Take the title line into account. */
2088 int lines = prev->lineno - prev->offset - prev->height + 1;
2090 /* Scroll the view that was split if the current line is
2091 * outside the new limited view. */
2092 do_scroll_view(prev, lines);
2093 }
2095 if (prev && view != prev) {
2096 if (split && !backgrounded) {
2097 /* "Blur" the previous view. */
2098 update_view_title(prev);
2099 }
2101 view->parent = prev;
2102 }
2104 if (view->pipe && view->lines == 0) {
2105 /* Clear the old view and let the incremental updating refill
2106 * the screen. */
2107 wclear(view->win);
2108 report("");
2109 } else {
2110 redraw_view(view);
2111 report("");
2112 }
2114 /* If the view is backgrounded the above calls to report()
2115 * won't redraw the view title. */
2116 if (backgrounded)
2117 update_view_title(view);
2118 }
2121 /*
2122 * User request switch noodle
2123 */
2125 static void status_update(struct view *view);
2127 static int
2128 view_driver(struct view *view, enum request request)
2129 {
2130 int i;
2132 switch (request) {
2133 case REQ_MOVE_UP:
2134 case REQ_MOVE_DOWN:
2135 case REQ_MOVE_PAGE_UP:
2136 case REQ_MOVE_PAGE_DOWN:
2137 case REQ_MOVE_FIRST_LINE:
2138 case REQ_MOVE_LAST_LINE:
2139 move_view(view, request);
2140 break;
2142 case REQ_SCROLL_LINE_DOWN:
2143 case REQ_SCROLL_LINE_UP:
2144 case REQ_SCROLL_PAGE_DOWN:
2145 case REQ_SCROLL_PAGE_UP:
2146 scroll_view(view, request);
2147 break;
2149 case REQ_VIEW_BLOB:
2150 if (!ref_blob[0]) {
2151 report("No file chosen, press %s to open tree view",
2152 get_key(REQ_VIEW_TREE));
2153 break;
2154 }
2155 open_view(view, request, OPEN_DEFAULT);
2156 break;
2158 case REQ_VIEW_PAGER:
2159 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2160 report("No pager content, press %s to run command from prompt",
2161 get_key(REQ_PROMPT));
2162 break;
2163 }
2164 open_view(view, request, OPEN_DEFAULT);
2165 break;
2167 case REQ_VIEW_MAIN:
2168 case REQ_VIEW_DIFF:
2169 case REQ_VIEW_LOG:
2170 case REQ_VIEW_TREE:
2171 case REQ_VIEW_HELP:
2172 case REQ_VIEW_STATUS:
2173 open_view(view, request, OPEN_DEFAULT);
2174 break;
2176 case REQ_NEXT:
2177 case REQ_PREVIOUS:
2178 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2180 if ((view == VIEW(REQ_VIEW_DIFF) &&
2181 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2182 (view == VIEW(REQ_VIEW_BLOB) &&
2183 view->parent == VIEW(REQ_VIEW_TREE))) {
2184 int line;
2186 view = view->parent;
2187 line = view->lineno;
2188 move_view(view, request);
2189 if (view_is_displayed(view))
2190 update_view_title(view);
2191 if (line == view->lineno)
2192 break;
2193 } else {
2194 move_view(view, request);
2195 break;
2196 }
2197 /* Fall-through */
2199 case REQ_ENTER:
2200 if (!view->lines) {
2201 report("Nothing to enter");
2202 break;
2203 }
2204 return view->ops->enter(view, &view->line[view->lineno]);
2206 case REQ_VIEW_NEXT:
2207 {
2208 int nviews = displayed_views();
2209 int next_view = (current_view + 1) % nviews;
2211 if (next_view == current_view) {
2212 report("Only one view is displayed");
2213 break;
2214 }
2216 current_view = next_view;
2217 /* Blur out the title of the previous view. */
2218 update_view_title(view);
2219 report("");
2220 break;
2221 }
2222 case REQ_TOGGLE_LINENO:
2223 opt_line_number = !opt_line_number;
2224 redraw_display();
2225 break;
2227 case REQ_TOGGLE_REV_GRAPH:
2228 opt_rev_graph = !opt_rev_graph;
2229 redraw_display();
2230 break;
2232 case REQ_PROMPT:
2233 /* Always reload^Wrerun commands from the prompt. */
2234 open_view(view, opt_request, OPEN_RELOAD);
2235 break;
2237 case REQ_SEARCH:
2238 case REQ_SEARCH_BACK:
2239 search_view(view, request);
2240 break;
2242 case REQ_FIND_NEXT:
2243 case REQ_FIND_PREV:
2244 find_next(view, request);
2245 break;
2247 case REQ_STOP_LOADING:
2248 for (i = 0; i < ARRAY_SIZE(views); i++) {
2249 view = &views[i];
2250 if (view->pipe)
2251 report("Stopped loading the %s view", view->name),
2252 end_update(view);
2253 }
2254 break;
2256 case REQ_SHOW_VERSION:
2257 report("tig-%s (built %s)", VERSION, __DATE__);
2258 return TRUE;
2260 case REQ_SCREEN_RESIZE:
2261 resize_display();
2262 /* Fall-through */
2263 case REQ_SCREEN_REDRAW:
2264 redraw_display();
2265 break;
2267 case REQ_STATUS_UPDATE:
2268 status_update(view);
2269 break;
2271 case REQ_NONE:
2272 doupdate();
2273 return TRUE;
2275 case REQ_VIEW_CLOSE:
2276 /* XXX: Mark closed views by letting view->parent point to the
2277 * view itself. Parents to closed view should never be
2278 * followed. */
2279 if (view->parent &&
2280 view->parent->parent != view->parent) {
2281 memset(display, 0, sizeof(display));
2282 current_view = 0;
2283 display[current_view] = view->parent;
2284 view->parent = view;
2285 resize_display();
2286 redraw_display();
2287 break;
2288 }
2289 /* Fall-through */
2290 case REQ_QUIT:
2291 return FALSE;
2293 default:
2294 /* An unknown key will show most commonly used commands. */
2295 report("Unknown key, press 'h' for help");
2296 return TRUE;
2297 }
2299 return TRUE;
2300 }
2303 /*
2304 * Pager backend
2305 */
2307 static bool
2308 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2309 {
2310 char *text = line->data;
2311 enum line_type type = line->type;
2312 int textlen = strlen(text);
2313 int attr;
2315 wmove(view->win, lineno, 0);
2317 if (selected) {
2318 type = LINE_CURSOR;
2319 wchgat(view->win, -1, 0, type, NULL);
2320 }
2322 attr = get_line_attr(type);
2323 wattrset(view->win, attr);
2325 if (opt_line_number || opt_tab_size < TABSIZE) {
2326 static char spaces[] = " ";
2327 int col_offset = 0, col = 0;
2329 if (opt_line_number) {
2330 unsigned long real_lineno = view->offset + lineno + 1;
2332 if (real_lineno == 1 ||
2333 (real_lineno % opt_num_interval) == 0) {
2334 wprintw(view->win, "%.*d", view->digits, real_lineno);
2336 } else {
2337 waddnstr(view->win, spaces,
2338 MIN(view->digits, STRING_SIZE(spaces)));
2339 }
2340 waddstr(view->win, ": ");
2341 col_offset = view->digits + 2;
2342 }
2344 while (text && col_offset + col < view->width) {
2345 int cols_max = view->width - col_offset - col;
2346 char *pos = text;
2347 int cols;
2349 if (*text == '\t') {
2350 text++;
2351 assert(sizeof(spaces) > TABSIZE);
2352 pos = spaces;
2353 cols = opt_tab_size - (col % opt_tab_size);
2355 } else {
2356 text = strchr(text, '\t');
2357 cols = line ? text - pos : strlen(pos);
2358 }
2360 waddnstr(view->win, pos, MIN(cols, cols_max));
2361 col += cols;
2362 }
2364 } else {
2365 int col = 0, pos = 0;
2367 for (; pos < textlen && col < view->width; pos++, col++)
2368 if (text[pos] == '\t')
2369 col += TABSIZE - (col % TABSIZE) - 1;
2371 waddnstr(view->win, text, pos);
2372 }
2374 return TRUE;
2375 }
2377 static bool
2378 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2379 {
2380 char refbuf[SIZEOF_STR];
2381 char *ref = NULL;
2382 FILE *pipe;
2384 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2385 return TRUE;
2387 pipe = popen(refbuf, "r");
2388 if (!pipe)
2389 return TRUE;
2391 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2392 ref = chomp_string(ref);
2393 pclose(pipe);
2395 if (!ref || !*ref)
2396 return TRUE;
2398 /* This is the only fatal call, since it can "corrupt" the buffer. */
2399 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2400 return FALSE;
2402 return TRUE;
2403 }
2405 static void
2406 add_pager_refs(struct view *view, struct line *line)
2407 {
2408 char buf[SIZEOF_STR];
2409 char *commit_id = line->data + STRING_SIZE("commit ");
2410 struct ref **refs;
2411 size_t bufpos = 0, refpos = 0;
2412 const char *sep = "Refs: ";
2413 bool is_tag = FALSE;
2415 assert(line->type == LINE_COMMIT);
2417 refs = get_refs(commit_id);
2418 if (!refs) {
2419 if (view == VIEW(REQ_VIEW_DIFF))
2420 goto try_add_describe_ref;
2421 return;
2422 }
2424 do {
2425 struct ref *ref = refs[refpos];
2426 char *fmt = ref->tag ? "%s[%s]" :
2427 ref->remote ? "%s<%s>" : "%s%s";
2429 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2430 return;
2431 sep = ", ";
2432 if (ref->tag)
2433 is_tag = TRUE;
2434 } while (refs[refpos++]->next);
2436 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2437 try_add_describe_ref:
2438 /* Add <tag>-g<commit_id> "fake" reference. */
2439 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2440 return;
2441 }
2443 if (bufpos == 0)
2444 return;
2446 if (!realloc_lines(view, view->line_size + 1))
2447 return;
2449 add_line_text(view, buf, LINE_PP_REFS);
2450 }
2452 static bool
2453 pager_read(struct view *view, char *data)
2454 {
2455 struct line *line;
2457 if (!data)
2458 return TRUE;
2460 line = add_line_text(view, data, get_line_type(data));
2461 if (!line)
2462 return FALSE;
2464 if (line->type == LINE_COMMIT &&
2465 (view == VIEW(REQ_VIEW_DIFF) ||
2466 view == VIEW(REQ_VIEW_LOG)))
2467 add_pager_refs(view, line);
2469 return TRUE;
2470 }
2472 static bool
2473 pager_enter(struct view *view, struct line *line)
2474 {
2475 int split = 0;
2477 if (line->type == LINE_COMMIT &&
2478 (view == VIEW(REQ_VIEW_LOG) ||
2479 view == VIEW(REQ_VIEW_PAGER))) {
2480 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2481 split = 1;
2482 }
2484 /* Always scroll the view even if it was split. That way
2485 * you can use Enter to scroll through the log view and
2486 * split open each commit diff. */
2487 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2489 /* FIXME: A minor workaround. Scrolling the view will call report("")
2490 * but if we are scrolling a non-current view this won't properly
2491 * update the view title. */
2492 if (split)
2493 update_view_title(view);
2495 return TRUE;
2496 }
2498 static bool
2499 pager_grep(struct view *view, struct line *line)
2500 {
2501 regmatch_t pmatch;
2502 char *text = line->data;
2504 if (!*text)
2505 return FALSE;
2507 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2508 return FALSE;
2510 return TRUE;
2511 }
2513 static void
2514 pager_select(struct view *view, struct line *line)
2515 {
2516 if (line->type == LINE_COMMIT) {
2517 char *text = line->data + STRING_SIZE("commit ");
2519 if (view != VIEW(REQ_VIEW_PAGER))
2520 string_copy_rev(view->ref, text);
2521 string_copy_rev(ref_commit, text);
2522 }
2523 }
2525 static struct view_ops pager_ops = {
2526 "line",
2527 NULL,
2528 pager_read,
2529 pager_draw,
2530 pager_enter,
2531 pager_grep,
2532 pager_select,
2533 };
2536 /*
2537 * Help backend
2538 */
2540 static bool
2541 help_open(struct view *view)
2542 {
2543 char buf[BUFSIZ];
2544 int lines = ARRAY_SIZE(req_info) + 2;
2545 int i;
2547 if (view->lines > 0)
2548 return TRUE;
2550 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2551 if (!req_info[i].request)
2552 lines++;
2554 view->line = calloc(lines, sizeof(*view->line));
2555 if (!view->line)
2556 return FALSE;
2558 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2560 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2561 char *key;
2563 if (!req_info[i].request) {
2564 add_line_text(view, "", LINE_DEFAULT);
2565 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2566 continue;
2567 }
2569 key = get_key(req_info[i].request);
2570 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2571 continue;
2573 add_line_text(view, buf, LINE_DEFAULT);
2574 }
2576 return TRUE;
2577 }
2579 static struct view_ops help_ops = {
2580 "line",
2581 help_open,
2582 NULL,
2583 pager_draw,
2584 pager_enter,
2585 pager_grep,
2586 pager_select,
2587 };
2590 /*
2591 * Tree backend
2592 */
2594 /* Parse output from git-ls-tree(1):
2595 *
2596 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2597 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2598 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2599 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2600 */
2602 #define SIZEOF_TREE_ATTR \
2603 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2605 #define TREE_UP_FORMAT "040000 tree %s\t.."
2607 static int
2608 tree_compare_entry(enum line_type type1, char *name1,
2609 enum line_type type2, char *name2)
2610 {
2611 if (type1 != type2) {
2612 if (type1 == LINE_TREE_DIR)
2613 return -1;
2614 return 1;
2615 }
2617 return strcmp(name1, name2);
2618 }
2620 static bool
2621 tree_read(struct view *view, char *text)
2622 {
2623 size_t textlen = text ? strlen(text) : 0;
2624 char buf[SIZEOF_STR];
2625 unsigned long pos;
2626 enum line_type type;
2627 bool first_read = view->lines == 0;
2629 if (textlen <= SIZEOF_TREE_ATTR)
2630 return FALSE;
2632 type = text[STRING_SIZE("100644 ")] == 't'
2633 ? LINE_TREE_DIR : LINE_TREE_FILE;
2635 if (first_read) {
2636 /* Add path info line */
2637 if (!string_format(buf, "Directory path /%s", opt_path) ||
2638 !realloc_lines(view, view->line_size + 1) ||
2639 !add_line_text(view, buf, LINE_DEFAULT))
2640 return FALSE;
2642 /* Insert "link" to parent directory. */
2643 if (*opt_path) {
2644 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
2645 !realloc_lines(view, view->line_size + 1) ||
2646 !add_line_text(view, buf, LINE_TREE_DIR))
2647 return FALSE;
2648 }
2649 }
2651 /* Strip the path part ... */
2652 if (*opt_path) {
2653 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2654 size_t striplen = strlen(opt_path);
2655 char *path = text + SIZEOF_TREE_ATTR;
2657 if (pathlen > striplen)
2658 memmove(path, path + striplen,
2659 pathlen - striplen + 1);
2660 }
2662 /* Skip "Directory ..." and ".." line. */
2663 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2664 struct line *line = &view->line[pos];
2665 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2666 char *path2 = text + SIZEOF_TREE_ATTR;
2667 int cmp = tree_compare_entry(line->type, path1, type, path2);
2669 if (cmp <= 0)
2670 continue;
2672 text = strdup(text);
2673 if (!text)
2674 return FALSE;
2676 if (view->lines > pos)
2677 memmove(&view->line[pos + 1], &view->line[pos],
2678 (view->lines - pos) * sizeof(*line));
2680 line = &view->line[pos];
2681 line->data = text;
2682 line->type = type;
2683 view->lines++;
2684 return TRUE;
2685 }
2687 if (!add_line_text(view, text, type))
2688 return FALSE;
2690 /* Move the current line to the first tree entry. */
2691 if (first_read)
2692 view->lineno++;
2694 return TRUE;
2695 }
2697 static bool
2698 tree_enter(struct view *view, struct line *line)
2699 {
2700 enum open_flags flags;
2701 enum request request;
2703 switch (line->type) {
2704 case LINE_TREE_DIR:
2705 /* Depending on whether it is a subdir or parent (updir?) link
2706 * mangle the path buffer. */
2707 if (line == &view->line[1] && *opt_path) {
2708 size_t path_len = strlen(opt_path);
2709 char *dirsep = opt_path + path_len - 1;
2711 while (dirsep > opt_path && dirsep[-1] != '/')
2712 dirsep--;
2714 dirsep[0] = 0;
2716 } else {
2717 size_t pathlen = strlen(opt_path);
2718 size_t origlen = pathlen;
2719 char *data = line->data;
2720 char *basename = data + SIZEOF_TREE_ATTR;
2722 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2723 opt_path[origlen] = 0;
2724 return TRUE;
2725 }
2726 }
2728 /* Trees and subtrees share the same ID, so they are not not
2729 * unique like blobs. */
2730 flags = OPEN_RELOAD;
2731 request = REQ_VIEW_TREE;
2732 break;
2734 case LINE_TREE_FILE:
2735 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2736 request = REQ_VIEW_BLOB;
2737 break;
2739 default:
2740 return TRUE;
2741 }
2743 open_view(view, request, flags);
2745 return TRUE;
2746 }
2748 static void
2749 tree_select(struct view *view, struct line *line)
2750 {
2751 char *text = line->data + STRING_SIZE("100644 blob ");
2753 if (line->type == LINE_TREE_FILE) {
2754 string_copy_rev(ref_blob, text);
2756 } else if (line->type != LINE_TREE_DIR) {
2757 return;
2758 }
2760 string_copy_rev(view->ref, text);
2761 }
2763 static struct view_ops tree_ops = {
2764 "file",
2765 NULL,
2766 tree_read,
2767 pager_draw,
2768 tree_enter,
2769 pager_grep,
2770 tree_select,
2771 };
2773 static bool
2774 blob_read(struct view *view, char *line)
2775 {
2776 return add_line_text(view, line, LINE_DEFAULT);
2777 }
2779 static struct view_ops blob_ops = {
2780 "line",
2781 NULL,
2782 blob_read,
2783 pager_draw,
2784 pager_enter,
2785 pager_grep,
2786 pager_select,
2787 };
2790 /*
2791 * Status backend
2792 */
2794 struct status {
2795 char status;
2796 struct {
2797 mode_t mode;
2798 char rev[SIZEOF_REV];
2799 } old;
2800 struct {
2801 mode_t mode;
2802 char rev[SIZEOF_REV];
2803 } new;
2804 char name[SIZEOF_STR];
2805 };
2807 /* Get fields from the diff line:
2808 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
2809 */
2810 static inline bool
2811 status_get_diff(struct status *file, char *buf, size_t bufsize)
2812 {
2813 char *old_mode = buf + 1;
2814 char *new_mode = buf + 8;
2815 char *old_rev = buf + 15;
2816 char *new_rev = buf + 56;
2817 char *status = buf + 97;
2819 if (bufsize != 99 ||
2820 old_mode[-1] != ':' ||
2821 new_mode[-1] != ' ' ||
2822 old_rev[-1] != ' ' ||
2823 new_rev[-1] != ' ' ||
2824 status[-1] != ' ')
2825 return FALSE;
2827 file->status = *status;
2829 string_copy_rev(file->old.rev, old_rev);
2830 string_copy_rev(file->new.rev, new_rev);
2832 file->old.mode = strtoul(old_mode, NULL, 8);
2833 file->new.mode = strtoul(new_mode, NULL, 8);
2835 file->name[0] = 0;
2837 return TRUE;
2838 }
2840 static bool
2841 status_run(struct view *view, const char cmd[], bool diff, enum line_type type)
2842 {
2843 struct status *file = NULL;
2844 char buf[SIZEOF_STR * 4];
2845 size_t bufsize = 0;
2846 FILE *pipe;
2848 pipe = popen(cmd, "r");
2849 if (!pipe)
2850 return FALSE;
2852 add_line_data(view, NULL, type);
2854 while (!feof(pipe) && !ferror(pipe)) {
2855 char *sep;
2856 size_t readsize;
2858 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
2859 if (!readsize)
2860 break;
2861 bufsize += readsize;
2863 /* Process while we have NUL chars. */
2864 while ((sep = memchr(buf, 0, bufsize))) {
2865 size_t sepsize = sep - buf + 1;
2867 if (!file) {
2868 if (!realloc_lines(view, view->line_size + 1))
2869 goto error_out;
2871 file = calloc(1, sizeof(*file));
2872 if (!file)
2873 goto error_out;
2875 add_line_data(view, file, type);
2876 }
2878 /* Parse diff info part. */
2879 if (!diff) {
2880 file->status = '?';
2882 } else if (!file->status) {
2883 if (!status_get_diff(file, buf, sepsize))
2884 goto error_out;
2886 bufsize -= sepsize;
2887 memmove(buf, sep + 1, bufsize);
2889 sep = memchr(buf, 0, bufsize);
2890 if (!sep)
2891 break;
2892 sepsize = sep - buf + 1;
2893 }
2895 /* git-ls-files just delivers a NUL separated
2896 * list of file names similar to the second half
2897 * of the git-diff-* output. */
2898 string_ncopy(file->name, buf, sepsize);
2899 bufsize -= sepsize;
2900 memmove(buf, sep + 1, bufsize);
2901 file = NULL;
2902 }
2903 }
2905 if (ferror(pipe)) {
2906 error_out:
2907 pclose(pipe);
2908 return FALSE;
2909 }
2911 if (!view->line[view->lines - 1].data)
2912 add_line_data(view, NULL, LINE_STAT_NONE);
2914 pclose(pipe);
2915 return TRUE;
2916 }
2918 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --cached HEAD"
2919 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
2920 #define STATUS_LIST_OTHER_CMD \
2921 "git ls-files -z --others --exclude-per-directory=.gitignore"
2923 #define STATUS_DIFF_SHOW_CMD \
2924 "git diff --root --patch-with-stat --find-copies-harder -B -C %s -- %s 2>/dev/null"
2926 /* First parse staged info using git-diff-index(1), then parse unstaged
2927 * info using git-diff-files(1), and finally untracked files using
2928 * git-ls-files(1). */
2929 static bool
2930 status_open(struct view *view)
2931 {
2932 struct stat statbuf;
2933 char exclude[SIZEOF_STR];
2934 char cmd[SIZEOF_STR];
2935 size_t i;
2937 for (i = 0; i < view->lines; i++)
2938 free(view->line[i].data);
2939 free(view->line);
2940 view->lines = view->line_size = 0;
2941 view->line = NULL;
2943 if (!realloc_lines(view, view->line_size + 6))
2944 return FALSE;
2946 if (!string_format(exclude, "%s/info/exclude", opt_git_dir))
2947 return FALSE;
2949 string_copy(cmd, STATUS_LIST_OTHER_CMD);
2951 if (stat(exclude, &statbuf) >= 0) {
2952 size_t cmdsize = strlen(cmd);
2954 if (!string_format_from(cmd, &cmdsize, " %s", "--exclude-from=") ||
2955 sq_quote(cmd, cmdsize, exclude) >= sizeof(cmd))
2956 return FALSE;
2957 }
2959 if (!status_run(view, STATUS_DIFF_INDEX_CMD, TRUE, LINE_STAT_STAGED) ||
2960 !status_run(view, STATUS_DIFF_FILES_CMD, TRUE, LINE_STAT_UNSTAGED) ||
2961 !status_run(view, cmd, FALSE, LINE_STAT_UNTRACKED))
2962 return FALSE;
2964 return TRUE;
2965 }
2967 static bool
2968 status_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2969 {
2970 struct status *status = line->data;
2972 wmove(view->win, lineno, 0);
2974 if (selected) {
2975 wattrset(view->win, get_line_attr(LINE_CURSOR));
2976 wchgat(view->win, -1, 0, LINE_CURSOR, NULL);
2978 } else if (!status && line->type != LINE_STAT_NONE) {
2979 wattrset(view->win, get_line_attr(LINE_STAT_SECTION));
2980 wchgat(view->win, -1, 0, LINE_STAT_SECTION, NULL);
2982 } else {
2983 wattrset(view->win, get_line_attr(line->type));
2984 }
2986 if (!status) {
2987 char *text;
2989 switch (line->type) {
2990 case LINE_STAT_STAGED:
2991 text = "Changes to be committed:";
2992 break;
2994 case LINE_STAT_UNSTAGED:
2995 text = "Changed but not updated:";
2996 break;
2998 case LINE_STAT_UNTRACKED:
2999 text = "Untracked files:";
3000 break;
3002 case LINE_STAT_NONE:
3003 text = " (no files)";
3004 break;
3006 default:
3007 return FALSE;
3008 }
3010 waddstr(view->win, text);
3011 return TRUE;
3012 }
3014 waddch(view->win, status->status);
3015 if (!selected)
3016 wattrset(view->win, A_NORMAL);
3017 wmove(view->win, lineno, 4);
3018 waddstr(view->win, status->name);
3020 return TRUE;
3021 }
3023 static bool
3024 status_enter(struct view *view, struct line *line)
3025 {
3026 struct status *status = line->data;
3027 char path[SIZEOF_STR];
3028 char *info;
3029 size_t cmdsize = 0;
3031 if (!status || line->type == LINE_STAT_NONE) {
3032 report("No file has been chosen");
3033 return TRUE;
3034 }
3036 if (sq_quote(path, 0, status->name) >= sizeof(path))
3037 return FALSE;
3039 if (opt_cdup[0] &&
3040 line->type != LINE_STAT_UNTRACKED &&
3041 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
3042 return FALSE;
3044 switch (line->type) {
3045 case LINE_STAT_STAGED:
3046 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3047 "--cached", path))
3048 return FALSE;
3049 info = "Staged changes to %s";
3050 break;
3052 case LINE_STAT_UNSTAGED:
3053 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3054 "", path))
3055 return FALSE;
3056 info = "Unstaged changes to %s";
3057 break;
3059 case LINE_STAT_UNTRACKED:
3060 if (opt_pipe)
3061 return FALSE;
3062 opt_pipe = fopen(status->name, "r");
3063 info = "Untracked file %s";
3064 break;
3066 default:
3067 die("w00t");
3068 }
3070 open_view(view, REQ_VIEW_DIFF, OPEN_RELOAD | OPEN_SPLIT);
3071 if (view_is_displayed(VIEW(REQ_VIEW_DIFF))) {
3072 string_format(VIEW(REQ_VIEW_DIFF)->ref, info, status->name);
3073 }
3075 return TRUE;
3076 }
3078 static bool
3079 status_update_file(struct view *view, struct status *status, enum line_type type)
3080 {
3081 char cmd[SIZEOF_STR];
3082 char buf[SIZEOF_STR];
3083 size_t cmdsize = 0;
3084 size_t bufsize = 0;
3085 size_t written = 0;
3086 FILE *pipe;
3088 if (opt_cdup[0] &&
3089 type != LINE_STAT_UNTRACKED &&
3090 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3091 return FALSE;
3093 switch (type) {
3094 case LINE_STAT_STAGED:
3095 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
3096 status->old.mode,
3097 status->old.rev,
3098 status->name, 0))
3099 return FALSE;
3101 string_add(cmd, cmdsize, "git update-index -z --index-info");
3102 break;
3104 case LINE_STAT_UNSTAGED:
3105 case LINE_STAT_UNTRACKED:
3106 if (!string_format_from(buf, &bufsize, "%s%c", status->name, 0))
3107 return FALSE;
3109 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
3110 break;
3112 default:
3113 die("w00t");
3114 }
3116 pipe = popen(cmd, "w");
3117 if (!pipe)
3118 return FALSE;
3120 while (!ferror(pipe) && written < bufsize) {
3121 written += fwrite(buf + written, 1, bufsize - written, pipe);
3122 }
3124 pclose(pipe);
3126 if (written != bufsize)
3127 return FALSE;
3129 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3130 return TRUE;
3131 }
3133 static void
3134 status_update(struct view *view)
3135 {
3136 if (view == VIEW(REQ_VIEW_STATUS)) {
3137 struct line *line = view->lines
3138 ? &view->line[view->lineno] : NULL;
3140 if (!line || !line->data) {
3141 report("No file has been chosen");
3142 return;
3143 }
3145 if (!status_update_file(view, line->data, line->type))
3146 report("Failed to update file status");
3147 } else {
3148 report("This action is only valid for the status view");
3149 }
3150 }
3152 static void
3153 status_select(struct view *view, struct line *line)
3154 {
3155 char *text;
3157 switch (line->type) {
3158 case LINE_STAT_STAGED:
3159 text = "Press Enter to unstage file for commit";
3160 break;
3162 case LINE_STAT_UNSTAGED:
3163 text = "Press Enter to stage file for commit ";
3164 break;
3166 case LINE_STAT_UNTRACKED:
3167 text = "Press Enter to stage file for addition";
3168 break;
3170 case LINE_STAT_NONE:
3171 return;
3173 default:
3174 die("w00t");
3175 }
3177 string_ncopy(view->ref, text, strlen(text));
3178 }
3180 static bool
3181 status_grep(struct view *view, struct line *line)
3182 {
3183 struct status *status = line->data;
3184 enum { S_STATUS, S_NAME, S_END } state;
3185 char buf[2] = "?";
3186 regmatch_t pmatch;
3188 if (!status)
3189 return FALSE;
3191 for (state = S_STATUS; state < S_END; state++) {
3192 char *text;
3194 switch (state) {
3195 case S_NAME: text = status->name; break;
3196 case S_STATUS:
3197 buf[0] = status->status;
3198 text = buf;
3199 break;
3201 default:
3202 return FALSE;
3203 }
3205 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3206 return TRUE;
3207 }
3209 return FALSE;
3210 }
3212 static struct view_ops status_ops = {
3213 "file",
3214 status_open,
3215 NULL,
3216 status_draw,
3217 status_enter,
3218 status_grep,
3219 status_select,
3220 };
3223 /*
3224 * Revision graph
3225 */
3227 struct commit {
3228 char id[SIZEOF_REV]; /* SHA1 ID. */
3229 char title[128]; /* First line of the commit message. */
3230 char author[75]; /* Author of the commit. */
3231 struct tm time; /* Date from the author ident. */
3232 struct ref **refs; /* Repository references. */
3233 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
3234 size_t graph_size; /* The width of the graph array. */
3235 };
3237 /* Size of rev graph with no "padding" columns */
3238 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
3240 struct rev_graph {
3241 struct rev_graph *prev, *next, *parents;
3242 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
3243 size_t size;
3244 struct commit *commit;
3245 size_t pos;
3246 };
3248 /* Parents of the commit being visualized. */
3249 static struct rev_graph graph_parents[4];
3251 /* The current stack of revisions on the graph. */
3252 static struct rev_graph graph_stacks[4] = {
3253 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
3254 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
3255 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
3256 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
3257 };
3259 static inline bool
3260 graph_parent_is_merge(struct rev_graph *graph)
3261 {
3262 return graph->parents->size > 1;
3263 }
3265 static inline void
3266 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
3267 {
3268 struct commit *commit = graph->commit;
3270 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
3271 commit->graph[commit->graph_size++] = symbol;
3272 }
3274 static void
3275 done_rev_graph(struct rev_graph *graph)
3276 {
3277 if (graph_parent_is_merge(graph) &&
3278 graph->pos < graph->size - 1 &&
3279 graph->next->size == graph->size + graph->parents->size - 1) {
3280 size_t i = graph->pos + graph->parents->size - 1;
3282 graph->commit->graph_size = i * 2;
3283 while (i < graph->next->size - 1) {
3284 append_to_rev_graph(graph, ' ');
3285 append_to_rev_graph(graph, '\\');
3286 i++;
3287 }
3288 }
3290 graph->size = graph->pos = 0;
3291 graph->commit = NULL;
3292 memset(graph->parents, 0, sizeof(*graph->parents));
3293 }
3295 static void
3296 push_rev_graph(struct rev_graph *graph, char *parent)
3297 {
3298 int i;
3300 /* "Collapse" duplicate parents lines.
3301 *
3302 * FIXME: This needs to also update update the drawn graph but
3303 * for now it just serves as a method for pruning graph lines. */
3304 for (i = 0; i < graph->size; i++)
3305 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
3306 return;
3308 if (graph->size < SIZEOF_REVITEMS) {
3309 string_copy_rev(graph->rev[graph->size++], parent);
3310 }
3311 }
3313 static chtype
3314 get_rev_graph_symbol(struct rev_graph *graph)
3315 {
3316 chtype symbol;
3318 if (graph->parents->size == 0)
3319 symbol = REVGRAPH_INIT;
3320 else if (graph_parent_is_merge(graph))
3321 symbol = REVGRAPH_MERGE;
3322 else if (graph->pos >= graph->size)
3323 symbol = REVGRAPH_BRANCH;
3324 else
3325 symbol = REVGRAPH_COMMIT;
3327 return symbol;
3328 }
3330 static void
3331 draw_rev_graph(struct rev_graph *graph)
3332 {
3333 struct rev_filler {
3334 chtype separator, line;
3335 };
3336 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
3337 static struct rev_filler fillers[] = {
3338 { ' ', REVGRAPH_LINE },
3339 { '`', '.' },
3340 { '\'', ' ' },
3341 { '/', ' ' },
3342 };
3343 chtype symbol = get_rev_graph_symbol(graph);
3344 struct rev_filler *filler;
3345 size_t i;
3347 filler = &fillers[DEFAULT];
3349 for (i = 0; i < graph->pos; i++) {
3350 append_to_rev_graph(graph, filler->line);
3351 if (graph_parent_is_merge(graph->prev) &&
3352 graph->prev->pos == i)
3353 filler = &fillers[RSHARP];
3355 append_to_rev_graph(graph, filler->separator);
3356 }
3358 /* Place the symbol for this revision. */
3359 append_to_rev_graph(graph, symbol);
3361 if (graph->prev->size > graph->size)
3362 filler = &fillers[RDIAG];
3363 else
3364 filler = &fillers[DEFAULT];
3366 i++;
3368 for (; i < graph->size; i++) {
3369 append_to_rev_graph(graph, filler->separator);
3370 append_to_rev_graph(graph, filler->line);
3371 if (graph_parent_is_merge(graph->prev) &&
3372 i < graph->prev->pos + graph->parents->size)
3373 filler = &fillers[RSHARP];
3374 if (graph->prev->size > graph->size)
3375 filler = &fillers[LDIAG];
3376 }
3378 if (graph->prev->size > graph->size) {
3379 append_to_rev_graph(graph, filler->separator);
3380 if (filler->line != ' ')
3381 append_to_rev_graph(graph, filler->line);
3382 }
3383 }
3385 /* Prepare the next rev graph */
3386 static void
3387 prepare_rev_graph(struct rev_graph *graph)
3388 {
3389 size_t i;
3391 /* First, traverse all lines of revisions up to the active one. */
3392 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
3393 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
3394 break;
3396 push_rev_graph(graph->next, graph->rev[graph->pos]);
3397 }
3399 /* Interleave the new revision parent(s). */
3400 for (i = 0; i < graph->parents->size; i++)
3401 push_rev_graph(graph->next, graph->parents->rev[i]);
3403 /* Lastly, put any remaining revisions. */
3404 for (i = graph->pos + 1; i < graph->size; i++)
3405 push_rev_graph(graph->next, graph->rev[i]);
3406 }
3408 static void
3409 update_rev_graph(struct rev_graph *graph)
3410 {
3411 /* If this is the finalizing update ... */
3412 if (graph->commit)
3413 prepare_rev_graph(graph);
3415 /* Graph visualization needs a one rev look-ahead,
3416 * so the first update doesn't visualize anything. */
3417 if (!graph->prev->commit)
3418 return;
3420 draw_rev_graph(graph->prev);
3421 done_rev_graph(graph->prev->prev);
3422 }
3425 /*
3426 * Main view backend
3427 */
3429 static bool
3430 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3431 {
3432 char buf[DATE_COLS + 1];
3433 struct commit *commit = line->data;
3434 enum line_type type;
3435 int col = 0;
3436 size_t timelen;
3437 size_t authorlen;
3438 int trimmed = 1;
3440 if (!*commit->author)
3441 return FALSE;
3443 wmove(view->win, lineno, col);
3445 if (selected) {
3446 type = LINE_CURSOR;
3447 wattrset(view->win, get_line_attr(type));
3448 wchgat(view->win, -1, 0, type, NULL);
3450 } else {
3451 type = LINE_MAIN_COMMIT;
3452 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
3453 }
3455 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
3456 waddnstr(view->win, buf, timelen);
3457 waddstr(view->win, " ");
3459 col += DATE_COLS;
3460 wmove(view->win, lineno, col);
3461 if (type != LINE_CURSOR)
3462 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
3464 if (opt_utf8) {
3465 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
3466 } else {
3467 authorlen = strlen(commit->author);
3468 if (authorlen > AUTHOR_COLS - 2) {
3469 authorlen = AUTHOR_COLS - 2;
3470 trimmed = 1;
3471 }
3472 }
3474 if (trimmed) {
3475 waddnstr(view->win, commit->author, authorlen);
3476 if (type != LINE_CURSOR)
3477 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
3478 waddch(view->win, '~');
3479 } else {
3480 waddstr(view->win, commit->author);
3481 }
3483 col += AUTHOR_COLS;
3484 if (type != LINE_CURSOR)
3485 wattrset(view->win, A_NORMAL);
3487 if (opt_rev_graph && commit->graph_size) {
3488 size_t i;
3490 wmove(view->win, lineno, col);
3491 /* Using waddch() instead of waddnstr() ensures that
3492 * they'll be rendered correctly for the cursor line. */
3493 for (i = 0; i < commit->graph_size; i++)
3494 waddch(view->win, commit->graph[i]);
3496 waddch(view->win, ' ');
3497 col += commit->graph_size + 1;
3498 }
3500 wmove(view->win, lineno, col);
3502 if (commit->refs) {
3503 size_t i = 0;
3505 do {
3506 if (type == LINE_CURSOR)
3507 ;
3508 else if (commit->refs[i]->tag)
3509 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
3510 else if (commit->refs[i]->remote)
3511 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
3512 else
3513 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
3514 waddstr(view->win, "[");
3515 waddstr(view->win, commit->refs[i]->name);
3516 waddstr(view->win, "]");
3517 if (type != LINE_CURSOR)
3518 wattrset(view->win, A_NORMAL);
3519 waddstr(view->win, " ");
3520 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
3521 } while (commit->refs[i++]->next);
3522 }
3524 if (type != LINE_CURSOR)
3525 wattrset(view->win, get_line_attr(type));
3527 {
3528 int titlelen = strlen(commit->title);
3530 if (col + titlelen > view->width)
3531 titlelen = view->width - col;
3533 waddnstr(view->win, commit->title, titlelen);
3534 }
3536 return TRUE;
3537 }
3539 /* Reads git log --pretty=raw output and parses it into the commit struct. */
3540 static bool
3541 main_read(struct view *view, char *line)
3542 {
3543 static struct rev_graph *graph = graph_stacks;
3544 enum line_type type;
3545 struct commit *commit;
3547 if (!line) {
3548 update_rev_graph(graph);
3549 return TRUE;
3550 }
3552 type = get_line_type(line);
3553 if (type == LINE_COMMIT) {
3554 commit = calloc(1, sizeof(struct commit));
3555 if (!commit)
3556 return FALSE;
3558 string_copy_rev(commit->id, line + STRING_SIZE("commit "));
3559 commit->refs = get_refs(commit->id);
3560 graph->commit = commit;
3561 add_line_data(view, commit, LINE_MAIN_COMMIT);
3562 return TRUE;
3563 }
3565 if (!view->lines)
3566 return TRUE;
3567 commit = view->line[view->lines - 1].data;
3569 switch (type) {
3570 case LINE_PARENT:
3571 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
3572 break;
3574 case LINE_AUTHOR:
3575 {
3576 /* Parse author lines where the name may be empty:
3577 * author <email@address.tld> 1138474660 +0100
3578 */
3579 char *ident = line + STRING_SIZE("author ");
3580 char *nameend = strchr(ident, '<');
3581 char *emailend = strchr(ident, '>');
3583 if (!nameend || !emailend)
3584 break;
3586 update_rev_graph(graph);
3587 graph = graph->next;
3589 *nameend = *emailend = 0;
3590 ident = chomp_string(ident);
3591 if (!*ident) {
3592 ident = chomp_string(nameend + 1);
3593 if (!*ident)
3594 ident = "Unknown";
3595 }
3597 string_ncopy(commit->author, ident, strlen(ident));
3599 /* Parse epoch and timezone */
3600 if (emailend[1] == ' ') {
3601 char *secs = emailend + 2;
3602 char *zone = strchr(secs, ' ');
3603 time_t time = (time_t) atol(secs);
3605 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3606 long tz;
3608 zone++;
3609 tz = ('0' - zone[1]) * 60 * 60 * 10;
3610 tz += ('0' - zone[2]) * 60 * 60;
3611 tz += ('0' - zone[3]) * 60;
3612 tz += ('0' - zone[4]) * 60;
3614 if (zone[0] == '-')
3615 tz = -tz;
3617 time -= tz;
3618 }
3620 gmtime_r(&time, &commit->time);
3621 }
3622 break;
3623 }
3624 default:
3625 /* Fill in the commit title if it has not already been set. */
3626 if (commit->title[0])
3627 break;
3629 /* Require titles to start with a non-space character at the
3630 * offset used by git log. */
3631 if (strncmp(line, " ", 4))
3632 break;
3633 line += 4;
3634 /* Well, if the title starts with a whitespace character,
3635 * try to be forgiving. Otherwise we end up with no title. */
3636 while (isspace(*line))
3637 line++;
3638 if (*line == '\0')
3639 break;
3640 /* FIXME: More graceful handling of titles; append "..." to
3641 * shortened titles, etc. */
3643 string_ncopy(commit->title, line, strlen(line));
3644 }
3646 return TRUE;
3647 }
3649 static bool
3650 main_enter(struct view *view, struct line *line)
3651 {
3652 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3654 open_view(view, REQ_VIEW_DIFF, flags);
3655 return TRUE;
3656 }
3658 static bool
3659 main_grep(struct view *view, struct line *line)
3660 {
3661 struct commit *commit = line->data;
3662 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
3663 char buf[DATE_COLS + 1];
3664 regmatch_t pmatch;
3666 for (state = S_TITLE; state < S_END; state++) {
3667 char *text;
3669 switch (state) {
3670 case S_TITLE: text = commit->title; break;
3671 case S_AUTHOR: text = commit->author; break;
3672 case S_DATE:
3673 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
3674 continue;
3675 text = buf;
3676 break;
3678 default:
3679 return FALSE;
3680 }
3682 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3683 return TRUE;
3684 }
3686 return FALSE;
3687 }
3689 static void
3690 main_select(struct view *view, struct line *line)
3691 {
3692 struct commit *commit = line->data;
3694 string_copy_rev(view->ref, commit->id);
3695 string_copy_rev(ref_commit, view->ref);
3696 }
3698 static struct view_ops main_ops = {
3699 "commit",
3700 NULL,
3701 main_read,
3702 main_draw,
3703 main_enter,
3704 main_grep,
3705 main_select,
3706 };
3709 /*
3710 * Unicode / UTF-8 handling
3711 *
3712 * NOTE: Much of the following code for dealing with unicode is derived from
3713 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
3714 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
3715 */
3717 /* I've (over)annotated a lot of code snippets because I am not entirely
3718 * confident that the approach taken by this small UTF-8 interface is correct.
3719 * --jonas */
3721 static inline int
3722 unicode_width(unsigned long c)
3723 {
3724 if (c >= 0x1100 &&
3725 (c <= 0x115f /* Hangul Jamo */
3726 || c == 0x2329
3727 || c == 0x232a
3728 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
3729 /* CJK ... Yi */
3730 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
3731 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
3732 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
3733 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
3734 || (c >= 0xffe0 && c <= 0xffe6)
3735 || (c >= 0x20000 && c <= 0x2fffd)
3736 || (c >= 0x30000 && c <= 0x3fffd)))
3737 return 2;
3739 return 1;
3740 }
3742 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3743 * Illegal bytes are set one. */
3744 static const unsigned char utf8_bytes[256] = {
3745 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,
3746 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,
3747 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,
3748 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,
3749 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,
3750 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,
3751 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,
3752 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,
3753 };
3755 /* Decode UTF-8 multi-byte representation into a unicode character. */
3756 static inline unsigned long
3757 utf8_to_unicode(const char *string, size_t length)
3758 {
3759 unsigned long unicode;
3761 switch (length) {
3762 case 1:
3763 unicode = string[0];
3764 break;
3765 case 2:
3766 unicode = (string[0] & 0x1f) << 6;
3767 unicode += (string[1] & 0x3f);
3768 break;
3769 case 3:
3770 unicode = (string[0] & 0x0f) << 12;
3771 unicode += ((string[1] & 0x3f) << 6);
3772 unicode += (string[2] & 0x3f);
3773 break;
3774 case 4:
3775 unicode = (string[0] & 0x0f) << 18;
3776 unicode += ((string[1] & 0x3f) << 12);
3777 unicode += ((string[2] & 0x3f) << 6);
3778 unicode += (string[3] & 0x3f);
3779 break;
3780 case 5:
3781 unicode = (string[0] & 0x0f) << 24;
3782 unicode += ((string[1] & 0x3f) << 18);
3783 unicode += ((string[2] & 0x3f) << 12);
3784 unicode += ((string[3] & 0x3f) << 6);
3785 unicode += (string[4] & 0x3f);
3786 break;
3787 case 6:
3788 unicode = (string[0] & 0x01) << 30;
3789 unicode += ((string[1] & 0x3f) << 24);
3790 unicode += ((string[2] & 0x3f) << 18);
3791 unicode += ((string[3] & 0x3f) << 12);
3792 unicode += ((string[4] & 0x3f) << 6);
3793 unicode += (string[5] & 0x3f);
3794 break;
3795 default:
3796 die("Invalid unicode length");
3797 }
3799 /* Invalid characters could return the special 0xfffd value but NUL
3800 * should be just as good. */
3801 return unicode > 0xffff ? 0 : unicode;
3802 }
3804 /* Calculates how much of string can be shown within the given maximum width
3805 * and sets trimmed parameter to non-zero value if all of string could not be
3806 * shown.
3807 *
3808 * Additionally, adds to coloffset how many many columns to move to align with
3809 * the expected position. Takes into account how multi-byte and double-width
3810 * characters will effect the cursor position.
3811 *
3812 * Returns the number of bytes to output from string to satisfy max_width. */
3813 static size_t
3814 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3815 {
3816 const char *start = string;
3817 const char *end = strchr(string, '\0');
3818 size_t mbwidth = 0;
3819 size_t width = 0;
3821 *trimmed = 0;
3823 while (string < end) {
3824 int c = *(unsigned char *) string;
3825 unsigned char bytes = utf8_bytes[c];
3826 size_t ucwidth;
3827 unsigned long unicode;
3829 if (string + bytes > end)
3830 break;
3832 /* Change representation to figure out whether
3833 * it is a single- or double-width character. */
3835 unicode = utf8_to_unicode(string, bytes);
3836 /* FIXME: Graceful handling of invalid unicode character. */
3837 if (!unicode)
3838 break;
3840 ucwidth = unicode_width(unicode);
3841 width += ucwidth;
3842 if (width > max_width) {
3843 *trimmed = 1;
3844 break;
3845 }
3847 /* The column offset collects the differences between the
3848 * number of bytes encoding a character and the number of
3849 * columns will be used for rendering said character.
3850 *
3851 * So if some character A is encoded in 2 bytes, but will be
3852 * represented on the screen using only 1 byte this will and up
3853 * adding 1 to the multi-byte column offset.
3854 *
3855 * Assumes that no double-width character can be encoding in
3856 * less than two bytes. */
3857 if (bytes > ucwidth)
3858 mbwidth += bytes - ucwidth;
3860 string += bytes;
3861 }
3863 *coloffset += mbwidth;
3865 return string - start;
3866 }
3869 /*
3870 * Status management
3871 */
3873 /* Whether or not the curses interface has been initialized. */
3874 static bool cursed = FALSE;
3876 /* The status window is used for polling keystrokes. */
3877 static WINDOW *status_win;
3879 static bool status_empty = TRUE;
3881 /* Update status and title window. */
3882 static void
3883 report(const char *msg, ...)
3884 {
3885 struct view *view = display[current_view];
3887 if (input_mode)
3888 return;
3890 if (!status_empty || *msg) {
3891 va_list args;
3893 va_start(args, msg);
3895 wmove(status_win, 0, 0);
3896 if (*msg) {
3897 vwprintw(status_win, msg, args);
3898 status_empty = FALSE;
3899 } else {
3900 status_empty = TRUE;
3901 }
3902 wclrtoeol(status_win);
3903 wrefresh(status_win);
3905 va_end(args);
3906 }
3908 update_view_title(view);
3909 update_display_cursor(view);
3910 }
3912 /* Controls when nodelay should be in effect when polling user input. */
3913 static void
3914 set_nonblocking_input(bool loading)
3915 {
3916 static unsigned int loading_views;
3918 if ((loading == FALSE && loading_views-- == 1) ||
3919 (loading == TRUE && loading_views++ == 0))
3920 nodelay(status_win, loading);
3921 }
3923 static void
3924 init_display(void)
3925 {
3926 int x, y;
3928 /* Initialize the curses library */
3929 if (isatty(STDIN_FILENO)) {
3930 cursed = !!initscr();
3931 } else {
3932 /* Leave stdin and stdout alone when acting as a pager. */
3933 FILE *io = fopen("/dev/tty", "r+");
3935 if (!io)
3936 die("Failed to open /dev/tty");
3937 cursed = !!newterm(NULL, io, io);
3938 }
3940 if (!cursed)
3941 die("Failed to initialize curses");
3943 nonl(); /* Tell curses not to do NL->CR/NL on output */
3944 cbreak(); /* Take input chars one at a time, no wait for \n */
3945 noecho(); /* Don't echo input */
3946 leaveok(stdscr, TRUE);
3948 if (has_colors())
3949 init_colors();
3951 getmaxyx(stdscr, y, x);
3952 status_win = newwin(1, 0, y - 1, 0);
3953 if (!status_win)
3954 die("Failed to create status window");
3956 /* Enable keyboard mapping */
3957 keypad(status_win, TRUE);
3958 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3959 }
3961 static char *
3962 read_prompt(const char *prompt)
3963 {
3964 enum { READING, STOP, CANCEL } status = READING;
3965 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3966 int pos = 0;
3968 while (status == READING) {
3969 struct view *view;
3970 int i, key;
3972 input_mode = TRUE;
3974 foreach_view (view, i)
3975 update_view(view);
3977 input_mode = FALSE;
3979 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
3980 wclrtoeol(status_win);
3982 /* Refresh, accept single keystroke of input */
3983 key = wgetch(status_win);
3984 switch (key) {
3985 case KEY_RETURN:
3986 case KEY_ENTER:
3987 case '\n':
3988 status = pos ? STOP : CANCEL;
3989 break;
3991 case KEY_BACKSPACE:
3992 if (pos > 0)
3993 pos--;
3994 else
3995 status = CANCEL;
3996 break;
3998 case KEY_ESC:
3999 status = CANCEL;
4000 break;
4002 case ERR:
4003 break;
4005 default:
4006 if (pos >= sizeof(buf)) {
4007 report("Input string too long");
4008 return NULL;
4009 }
4011 if (isprint(key))
4012 buf[pos++] = (char) key;
4013 }
4014 }
4016 /* Clear the status window */
4017 status_empty = FALSE;
4018 report("");
4020 if (status == CANCEL)
4021 return NULL;
4023 buf[pos++] = 0;
4025 return buf;
4026 }
4028 /*
4029 * Repository references
4030 */
4032 static struct ref *refs;
4033 static size_t refs_size;
4035 /* Id <-> ref store */
4036 static struct ref ***id_refs;
4037 static size_t id_refs_size;
4039 static struct ref **
4040 get_refs(char *id)
4041 {
4042 struct ref ***tmp_id_refs;
4043 struct ref **ref_list = NULL;
4044 size_t ref_list_size = 0;
4045 size_t i;
4047 for (i = 0; i < id_refs_size; i++)
4048 if (!strcmp(id, id_refs[i][0]->id))
4049 return id_refs[i];
4051 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
4052 if (!tmp_id_refs)
4053 return NULL;
4055 id_refs = tmp_id_refs;
4057 for (i = 0; i < refs_size; i++) {
4058 struct ref **tmp;
4060 if (strcmp(id, refs[i].id))
4061 continue;
4063 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
4064 if (!tmp) {
4065 if (ref_list)
4066 free(ref_list);
4067 return NULL;
4068 }
4070 ref_list = tmp;
4071 if (ref_list_size > 0)
4072 ref_list[ref_list_size - 1]->next = 1;
4073 ref_list[ref_list_size] = &refs[i];
4075 /* XXX: The properties of the commit chains ensures that we can
4076 * safely modify the shared ref. The repo references will
4077 * always be similar for the same id. */
4078 ref_list[ref_list_size]->next = 0;
4079 ref_list_size++;
4080 }
4082 if (ref_list)
4083 id_refs[id_refs_size++] = ref_list;
4085 return ref_list;
4086 }
4088 static int
4089 read_ref(char *id, size_t idlen, char *name, size_t namelen)
4090 {
4091 struct ref *ref;
4092 bool tag = FALSE;
4093 bool remote = FALSE;
4095 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
4096 /* Commits referenced by tags has "^{}" appended. */
4097 if (name[namelen - 1] != '}')
4098 return OK;
4100 while (namelen > 0 && name[namelen] != '^')
4101 namelen--;
4103 tag = TRUE;
4104 namelen -= STRING_SIZE("refs/tags/");
4105 name += STRING_SIZE("refs/tags/");
4107 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
4108 remote = TRUE;
4109 namelen -= STRING_SIZE("refs/remotes/");
4110 name += STRING_SIZE("refs/remotes/");
4112 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
4113 namelen -= STRING_SIZE("refs/heads/");
4114 name += STRING_SIZE("refs/heads/");
4116 } else if (!strcmp(name, "HEAD")) {
4117 return OK;
4118 }
4120 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
4121 if (!refs)
4122 return ERR;
4124 ref = &refs[refs_size++];
4125 ref->name = malloc(namelen + 1);
4126 if (!ref->name)
4127 return ERR;
4129 strncpy(ref->name, name, namelen);
4130 ref->name[namelen] = 0;
4131 ref->tag = tag;
4132 ref->remote = remote;
4133 string_copy_rev(ref->id, id);
4135 return OK;
4136 }
4138 static int
4139 load_refs(void)
4140 {
4141 const char *cmd_env = getenv("TIG_LS_REMOTE");
4142 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
4144 return read_properties(popen(cmd, "r"), "\t", read_ref);
4145 }
4147 static int
4148 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
4149 {
4150 if (!strcmp(name, "i18n.commitencoding"))
4151 string_ncopy(opt_encoding, value, valuelen);
4153 return OK;
4154 }
4156 static int
4157 load_repo_config(void)
4158 {
4159 return read_properties(popen("git repo-config --list", "r"),
4160 "=", read_repo_config_option);
4161 }
4163 static int
4164 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
4165 {
4166 if (!opt_git_dir[0])
4167 string_ncopy(opt_git_dir, name, namelen);
4168 else
4169 string_ncopy(opt_cdup, name, namelen);
4170 return OK;
4171 }
4173 /* XXX: The line outputted by "--show-cdup" can be empty so the option
4174 * must be the last one! */
4175 static int
4176 load_repo_info(void)
4177 {
4178 return read_properties(popen("git rev-parse --git-dir --show-cdup 2>/dev/null", "r"),
4179 "=", read_repo_info);
4180 }
4182 static int
4183 read_properties(FILE *pipe, const char *separators,
4184 int (*read_property)(char *, size_t, char *, size_t))
4185 {
4186 char buffer[BUFSIZ];
4187 char *name;
4188 int state = OK;
4190 if (!pipe)
4191 return ERR;
4193 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4194 char *value;
4195 size_t namelen;
4196 size_t valuelen;
4198 name = chomp_string(name);
4199 namelen = strcspn(name, separators);
4201 if (name[namelen]) {
4202 name[namelen] = 0;
4203 value = chomp_string(name + namelen + 1);
4204 valuelen = strlen(value);
4206 } else {
4207 value = "";
4208 valuelen = 0;
4209 }
4211 state = read_property(name, namelen, value, valuelen);
4212 }
4214 if (state != ERR && ferror(pipe))
4215 state = ERR;
4217 pclose(pipe);
4219 return state;
4220 }
4223 /*
4224 * Main
4225 */
4227 static void __NORETURN
4228 quit(int sig)
4229 {
4230 /* XXX: Restore tty modes and let the OS cleanup the rest! */
4231 if (cursed)
4232 endwin();
4233 exit(0);
4234 }
4236 static void __NORETURN
4237 die(const char *err, ...)
4238 {
4239 va_list args;
4241 endwin();
4243 va_start(args, err);
4244 fputs("tig: ", stderr);
4245 vfprintf(stderr, err, args);
4246 fputs("\n", stderr);
4247 va_end(args);
4249 exit(1);
4250 }
4252 int
4253 main(int argc, char *argv[])
4254 {
4255 struct view *view;
4256 enum request request;
4257 size_t i;
4259 signal(SIGINT, quit);
4261 if (setlocale(LC_ALL, "")) {
4262 char *codeset = nl_langinfo(CODESET);
4264 string_ncopy(opt_codeset, codeset, strlen(codeset));
4265 }
4267 if (load_repo_info() == ERR)
4268 die("Failed to load repo info.");
4270 /* Require a git repository unless when running in pager mode. */
4271 if (!opt_git_dir[0])
4272 die("Not a git repository");
4274 if (load_options() == ERR)
4275 die("Failed to load user config.");
4277 /* Load the repo config file so options can be overwritten from
4278 * the command line. */
4279 if (load_repo_config() == ERR)
4280 die("Failed to load repo config.");
4282 if (!parse_options(argc, argv))
4283 return 0;
4285 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
4286 opt_iconv = iconv_open(opt_codeset, opt_encoding);
4287 if (opt_iconv == ICONV_NONE)
4288 die("Failed to initialize character set conversion");
4289 }
4291 if (load_refs() == ERR)
4292 die("Failed to load refs.");
4294 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
4295 view->cmd_env = getenv(view->cmd_env);
4297 request = opt_request;
4299 init_display();
4301 while (view_driver(display[current_view], request)) {
4302 int key;
4303 int i;
4305 foreach_view (view, i)
4306 update_view(view);
4308 /* Refresh, accept single keystroke of input */
4309 key = wgetch(status_win);
4311 /* wgetch() with nodelay() enabled returns ERR when there's no
4312 * input. */
4313 if (key == ERR) {
4314 request = REQ_NONE;
4315 continue;
4316 }
4318 request = get_keybinding(display[current_view]->keymap, key);
4320 /* Some low-level request handling. This keeps access to
4321 * status_win restricted. */
4322 switch (request) {
4323 case REQ_PROMPT:
4324 {
4325 char *cmd = read_prompt(":");
4327 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
4328 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
4329 opt_request = REQ_VIEW_DIFF;
4330 } else {
4331 opt_request = REQ_VIEW_PAGER;
4332 }
4333 break;
4334 }
4336 request = REQ_NONE;
4337 break;
4338 }
4339 case REQ_SEARCH:
4340 case REQ_SEARCH_BACK:
4341 {
4342 const char *prompt = request == REQ_SEARCH
4343 ? "/" : "?";
4344 char *search = read_prompt(prompt);
4346 if (search)
4347 string_ncopy(opt_search, search, strlen(search));
4348 else
4349 request = REQ_NONE;
4350 break;
4351 }
4352 case REQ_SCREEN_RESIZE:
4353 {
4354 int height, width;
4356 getmaxyx(stdscr, height, width);
4358 /* Resize the status view and let the view driver take
4359 * care of resizing the displayed views. */
4360 wresize(status_win, 1, width);
4361 mvwin(status_win, height - 1, 0);
4362 wrefresh(status_win);
4363 break;
4364 }
4365 default:
4366 break;
4367 }
4368 }
4370 quit(0);
4372 return 0;
4373 }