b864e0b6e8d1953046637169509aaf736f32a209
1 /* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
14 #ifndef VERSION
15 #define VERSION "tig-0.5.git"
16 #endif
18 #ifndef DEBUG
19 #define NDEBUG
20 #endif
22 #include <assert.h>
23 #include <errno.h>
24 #include <ctype.h>
25 #include <signal.h>
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <unistd.h>
31 #include <time.h>
33 #include <sys/types.h>
34 #include <regex.h>
36 #include <locale.h>
37 #include <langinfo.h>
38 #include <iconv.h>
40 #include <curses.h>
42 #if __GNUC__ >= 3
43 #define __NORETURN __attribute__((__noreturn__))
44 #else
45 #define __NORETURN
46 #endif
48 static void __NORETURN die(const char *err, ...);
49 static void report(const char *msg, ...);
50 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
51 static void set_nonblocking_input(bool loading);
52 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
54 #define ABS(x) ((x) >= 0 ? (x) : -(x))
55 #define MIN(x, y) ((x) < (y) ? (x) : (y))
57 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
58 #define STRING_SIZE(x) (sizeof(x) - 1)
60 #define SIZEOF_STR 1024 /* Default string size. */
61 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
62 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
63 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
65 /* This color name can be used to refer to the default term colors. */
66 #define COLOR_DEFAULT (-1)
68 #define ICONV_NONE ((iconv_t) -1)
70 /* The format and size of the date column in the main view. */
71 #define DATE_FORMAT "%Y-%m-%d %H:%M"
72 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
74 #define AUTHOR_COLS 20
76 /* The default interval between line numbers. */
77 #define NUMBER_INTERVAL 1
79 #define TABSIZE 8
81 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
83 #define TIG_LS_REMOTE \
84 "git ls-remote . 2>/dev/null"
86 #define TIG_DIFF_CMD \
87 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
89 #define TIG_LOG_CMD \
90 "git log --cc --stat -n100 %s 2>/dev/null"
92 #define TIG_MAIN_CMD \
93 "git log --topo-order --pretty=raw %s 2>/dev/null"
95 #define TIG_TREE_CMD \
96 "git ls-tree %s %s"
98 #define TIG_BLOB_CMD \
99 "git cat-file blob %s"
101 /* XXX: Needs to be defined to the empty string. */
102 #define TIG_HELP_CMD ""
103 #define TIG_PAGER_CMD ""
105 /* Some ascii-shorthands fitted into the ncurses namespace. */
106 #define KEY_TAB '\t'
107 #define KEY_RETURN '\r'
108 #define KEY_ESC 27
111 struct ref {
112 char *name; /* Ref name; tag or head names are shortened. */
113 char id[SIZEOF_REV]; /* Commit SHA1 ID */
114 unsigned int tag:1; /* Is it a tag? */
115 unsigned int next:1; /* For ref lists: are there more refs? */
116 };
118 static struct ref **get_refs(char *id);
120 struct int_map {
121 const char *name;
122 int namelen;
123 int value;
124 };
126 static int
127 set_from_int_map(struct int_map *map, size_t map_size,
128 int *value, const char *name, int namelen)
129 {
131 int i;
133 for (i = 0; i < map_size; i++)
134 if (namelen == map[i].namelen &&
135 !strncasecmp(name, map[i].name, namelen)) {
136 *value = map[i].value;
137 return OK;
138 }
140 return ERR;
141 }
144 /*
145 * String helpers
146 */
148 static inline void
149 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
150 {
151 if (srclen > dstlen - 1)
152 srclen = dstlen - 1;
154 strncpy(dst, src, srclen);
155 dst[srclen] = 0;
156 }
158 /* Shorthands for safely copying into a fixed buffer. */
160 #define string_copy(dst, src) \
161 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
163 #define string_ncopy(dst, src, srclen) \
164 string_ncopy_do(dst, sizeof(dst), src, srclen)
166 static char *
167 chomp_string(char *name)
168 {
169 int namelen;
171 while (isspace(*name))
172 name++;
174 namelen = strlen(name) - 1;
175 while (namelen > 0 && isspace(name[namelen]))
176 name[namelen--] = 0;
178 return name;
179 }
181 static bool
182 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
183 {
184 va_list args;
185 size_t pos = bufpos ? *bufpos : 0;
187 va_start(args, fmt);
188 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
189 va_end(args);
191 if (bufpos)
192 *bufpos = pos;
194 return pos >= bufsize ? FALSE : TRUE;
195 }
197 #define string_format(buf, fmt, args...) \
198 string_nformat(buf, sizeof(buf), NULL, fmt, args)
200 #define string_format_from(buf, from, fmt, args...) \
201 string_nformat(buf, sizeof(buf), from, fmt, args)
203 static int
204 string_enum_compare(const char *str1, const char *str2, int len)
205 {
206 size_t i;
208 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
210 /* Diff-Header == DIFF_HEADER */
211 for (i = 0; i < len; i++) {
212 if (toupper(str1[i]) == toupper(str2[i]))
213 continue;
215 if (string_enum_sep(str1[i]) &&
216 string_enum_sep(str2[i]))
217 continue;
219 return str1[i] - str2[i];
220 }
222 return 0;
223 }
225 /* Shell quoting
226 *
227 * NOTE: The following is a slightly modified copy of the git project's shell
228 * quoting routines found in the quote.c file.
229 *
230 * Help to copy the thing properly quoted for the shell safety. any single
231 * quote is replaced with '\'', any exclamation point is replaced with '\!',
232 * and the whole thing is enclosed in a
233 *
234 * E.g.
235 * original sq_quote result
236 * name ==> name ==> 'name'
237 * a b ==> a b ==> 'a b'
238 * a'b ==> a'\''b ==> 'a'\''b'
239 * a!b ==> a'\!'b ==> 'a'\!'b'
240 */
242 static size_t
243 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
244 {
245 char c;
247 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
249 BUFPUT('\'');
250 while ((c = *src++)) {
251 if (c == '\'' || c == '!') {
252 BUFPUT('\'');
253 BUFPUT('\\');
254 BUFPUT(c);
255 BUFPUT('\'');
256 } else {
257 BUFPUT(c);
258 }
259 }
260 BUFPUT('\'');
262 return bufsize;
263 }
266 /*
267 * User requests
268 */
270 #define REQ_INFO \
271 /* XXX: Keep the view request first and in sync with views[]. */ \
272 REQ_GROUP("View switching") \
273 REQ_(VIEW_MAIN, "Show main view"), \
274 REQ_(VIEW_DIFF, "Show diff view"), \
275 REQ_(VIEW_LOG, "Show log view"), \
276 REQ_(VIEW_TREE, "Show tree view"), \
277 REQ_(VIEW_BLOB, "Show blob view"), \
278 REQ_(VIEW_HELP, "Show help page"), \
279 REQ_(VIEW_PAGER, "Show pager view"), \
280 \
281 REQ_GROUP("View manipulation") \
282 REQ_(ENTER, "Enter current line and scroll"), \
283 REQ_(NEXT, "Move to next"), \
284 REQ_(PREVIOUS, "Move to previous"), \
285 REQ_(VIEW_NEXT, "Move focus to next view"), \
286 REQ_(VIEW_CLOSE, "Close the current view"), \
287 REQ_(QUIT, "Close all views and quit"), \
288 \
289 REQ_GROUP("Cursor navigation") \
290 REQ_(MOVE_UP, "Move cursor one line up"), \
291 REQ_(MOVE_DOWN, "Move cursor one line down"), \
292 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
293 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
294 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
295 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
296 \
297 REQ_GROUP("Scrolling") \
298 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
299 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
300 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
301 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
302 \
303 REQ_GROUP("Searching") \
304 REQ_(SEARCH, "Search the view"), \
305 REQ_(SEARCH_BACK, "Search backwards in the view"), \
306 REQ_(FIND_NEXT, "Find next search match"), \
307 REQ_(FIND_PREV, "Find previous search match"), \
308 \
309 REQ_GROUP("Misc") \
310 REQ_(NONE, "Do nothing"), \
311 REQ_(PROMPT, "Bring up the prompt"), \
312 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
313 REQ_(SCREEN_RESIZE, "Resize the screen"), \
314 REQ_(SHOW_VERSION, "Show version information"), \
315 REQ_(STOP_LOADING, "Stop all loading views"), \
316 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
317 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
320 /* User action requests. */
321 enum request {
322 #define REQ_GROUP(help)
323 #define REQ_(req, help) REQ_##req
325 /* Offset all requests to avoid conflicts with ncurses getch values. */
326 REQ_OFFSET = KEY_MAX + 1,
327 REQ_INFO,
328 REQ_UNKNOWN,
330 #undef REQ_GROUP
331 #undef REQ_
332 };
334 struct request_info {
335 enum request request;
336 char *name;
337 int namelen;
338 char *help;
339 };
341 static struct request_info req_info[] = {
342 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
343 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
344 REQ_INFO
345 #undef REQ_GROUP
346 #undef REQ_
347 };
349 static enum request
350 get_request(const char *name)
351 {
352 int namelen = strlen(name);
353 int i;
355 for (i = 0; i < ARRAY_SIZE(req_info); i++)
356 if (req_info[i].namelen == namelen &&
357 !string_enum_compare(req_info[i].name, name, namelen))
358 return req_info[i].request;
360 return REQ_UNKNOWN;
361 }
364 /*
365 * Options
366 */
368 static const char usage[] =
369 VERSION " (" __DATE__ ")\n"
370 "\n"
371 "Usage: tig [options]\n"
372 " or: tig [options] [--] [git log options]\n"
373 " or: tig [options] log [git log options]\n"
374 " or: tig [options] diff [git diff options]\n"
375 " or: tig [options] show [git show options]\n"
376 " or: tig [options] < [git command output]\n"
377 "\n"
378 "Options:\n"
379 " -l Start up in log view\n"
380 " -d Start up in diff view\n"
381 " -n[I], --line-number[=I] Show line numbers with given interval\n"
382 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
383 " -- Mark end of tig options\n"
384 " -v, --version Show version and exit\n"
385 " -h, --help Show help message and exit\n";
387 /* Option and state variables. */
388 static bool opt_line_number = FALSE;
389 static bool opt_rev_graph = TRUE;
390 static int opt_num_interval = NUMBER_INTERVAL;
391 static int opt_tab_size = TABSIZE;
392 static enum request opt_request = REQ_VIEW_MAIN;
393 static char opt_cmd[SIZEOF_STR] = "";
394 static char opt_path[SIZEOF_STR] = "";
395 static FILE *opt_pipe = NULL;
396 static char opt_encoding[20] = "UTF-8";
397 static bool opt_utf8 = TRUE;
398 static char opt_codeset[20] = "UTF-8";
399 static iconv_t opt_iconv = ICONV_NONE;
400 static char opt_search[SIZEOF_STR] = "";
402 enum option_type {
403 OPT_NONE,
404 OPT_INT,
405 };
407 static bool
408 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
409 {
410 va_list args;
411 char *value = "";
412 int *number;
414 if (opt[0] != '-')
415 return FALSE;
417 if (opt[1] == '-') {
418 int namelen = strlen(name);
420 opt += 2;
422 if (strncmp(opt, name, namelen))
423 return FALSE;
425 if (opt[namelen] == '=')
426 value = opt + namelen + 1;
428 } else {
429 if (!short_name || opt[1] != short_name)
430 return FALSE;
431 value = opt + 2;
432 }
434 va_start(args, type);
435 if (type == OPT_INT) {
436 number = va_arg(args, int *);
437 if (isdigit(*value))
438 *number = atoi(value);
439 }
440 va_end(args);
442 return TRUE;
443 }
445 /* Returns the index of log or diff command or -1 to exit. */
446 static bool
447 parse_options(int argc, char *argv[])
448 {
449 int i;
451 for (i = 1; i < argc; i++) {
452 char *opt = argv[i];
454 if (!strcmp(opt, "log") ||
455 !strcmp(opt, "diff") ||
456 !strcmp(opt, "show")) {
457 opt_request = opt[0] == 'l'
458 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
459 break;
460 }
462 if (opt[0] && opt[0] != '-')
463 break;
465 if (!strcmp(opt, "-l")) {
466 opt_request = REQ_VIEW_LOG;
467 continue;
468 }
470 if (!strcmp(opt, "-d")) {
471 opt_request = REQ_VIEW_DIFF;
472 continue;
473 }
475 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
476 opt_line_number = TRUE;
477 continue;
478 }
480 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
481 opt_tab_size = MIN(opt_tab_size, TABSIZE);
482 continue;
483 }
485 if (check_option(opt, 'v', "version", OPT_NONE)) {
486 printf("tig version %s\n", VERSION);
487 return FALSE;
488 }
490 if (check_option(opt, 'h', "help", OPT_NONE)) {
491 printf(usage);
492 return FALSE;
493 }
495 if (!strcmp(opt, "--")) {
496 i++;
497 break;
498 }
500 die("unknown option '%s'\n\n%s", opt, usage);
501 }
503 if (!isatty(STDIN_FILENO)) {
504 opt_request = REQ_VIEW_PAGER;
505 opt_pipe = stdin;
507 } else if (i < argc) {
508 size_t buf_size;
510 if (opt_request == REQ_VIEW_MAIN)
511 /* XXX: This is vulnerable to the user overriding
512 * options required for the main view parser. */
513 string_copy(opt_cmd, "git log --stat --pretty=raw");
514 else
515 string_copy(opt_cmd, "git");
516 buf_size = strlen(opt_cmd);
518 while (buf_size < sizeof(opt_cmd) && i < argc) {
519 opt_cmd[buf_size++] = ' ';
520 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
521 }
523 if (buf_size >= sizeof(opt_cmd))
524 die("command too long");
526 opt_cmd[buf_size] = 0;
528 }
530 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
531 opt_utf8 = FALSE;
533 return TRUE;
534 }
537 /*
538 * Line-oriented content detection.
539 */
541 #define LINE_INFO \
542 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
543 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
544 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
545 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
546 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
547 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
548 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
549 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
550 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
551 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
552 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
553 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
554 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
555 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
556 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
557 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
558 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
559 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
560 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
561 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
562 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
563 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
564 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
565 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
566 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
567 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
568 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
569 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
570 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
571 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
572 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
573 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
574 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
575 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
576 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
577 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
578 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
579 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
580 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
581 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
582 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
584 enum line_type {
585 #define LINE(type, line, fg, bg, attr) \
586 LINE_##type
587 LINE_INFO
588 #undef LINE
589 };
591 struct line_info {
592 const char *name; /* Option name. */
593 int namelen; /* Size of option name. */
594 const char *line; /* The start of line to match. */
595 int linelen; /* Size of string to match. */
596 int fg, bg, attr; /* Color and text attributes for the lines. */
597 };
599 static struct line_info line_info[] = {
600 #define LINE(type, line, fg, bg, attr) \
601 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
602 LINE_INFO
603 #undef LINE
604 };
606 static enum line_type
607 get_line_type(char *line)
608 {
609 int linelen = strlen(line);
610 enum line_type type;
612 for (type = 0; type < ARRAY_SIZE(line_info); type++)
613 /* Case insensitive search matches Signed-off-by lines better. */
614 if (linelen >= line_info[type].linelen &&
615 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
616 return type;
618 return LINE_DEFAULT;
619 }
621 static inline int
622 get_line_attr(enum line_type type)
623 {
624 assert(type < ARRAY_SIZE(line_info));
625 return COLOR_PAIR(type) | line_info[type].attr;
626 }
628 static struct line_info *
629 get_line_info(char *name, int namelen)
630 {
631 enum line_type type;
633 for (type = 0; type < ARRAY_SIZE(line_info); type++)
634 if (namelen == line_info[type].namelen &&
635 !string_enum_compare(line_info[type].name, name, namelen))
636 return &line_info[type];
638 return NULL;
639 }
641 static void
642 init_colors(void)
643 {
644 int default_bg = COLOR_BLACK;
645 int default_fg = COLOR_WHITE;
646 enum line_type type;
648 start_color();
650 if (use_default_colors() != ERR) {
651 default_bg = -1;
652 default_fg = -1;
653 }
655 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
656 struct line_info *info = &line_info[type];
657 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
658 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
660 init_pair(type, fg, bg);
661 }
662 }
664 struct line {
665 enum line_type type;
667 /* State flags */
668 unsigned int selected:1;
670 void *data; /* User data */
671 };
674 /*
675 * Keys
676 */
678 struct keybinding {
679 int alias;
680 enum request request;
681 struct keybinding *next;
682 };
684 static struct keybinding default_keybindings[] = {
685 /* View switching */
686 { 'm', REQ_VIEW_MAIN },
687 { 'd', REQ_VIEW_DIFF },
688 { 'l', REQ_VIEW_LOG },
689 { 't', REQ_VIEW_TREE },
690 { 'f', REQ_VIEW_BLOB },
691 { 'p', REQ_VIEW_PAGER },
692 { 'h', REQ_VIEW_HELP },
694 /* View manipulation */
695 { 'q', REQ_VIEW_CLOSE },
696 { KEY_TAB, REQ_VIEW_NEXT },
697 { KEY_RETURN, REQ_ENTER },
698 { KEY_UP, REQ_PREVIOUS },
699 { KEY_DOWN, REQ_NEXT },
701 /* Cursor navigation */
702 { 'k', REQ_MOVE_UP },
703 { 'j', REQ_MOVE_DOWN },
704 { KEY_HOME, REQ_MOVE_FIRST_LINE },
705 { KEY_END, REQ_MOVE_LAST_LINE },
706 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
707 { ' ', REQ_MOVE_PAGE_DOWN },
708 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
709 { 'b', REQ_MOVE_PAGE_UP },
710 { '-', REQ_MOVE_PAGE_UP },
712 /* Scrolling */
713 { KEY_IC, REQ_SCROLL_LINE_UP },
714 { KEY_DC, REQ_SCROLL_LINE_DOWN },
715 { 'w', REQ_SCROLL_PAGE_UP },
716 { 's', REQ_SCROLL_PAGE_DOWN },
718 /* Searching */
719 { '/', REQ_SEARCH },
720 { '?', REQ_SEARCH_BACK },
721 { 'n', REQ_FIND_NEXT },
722 { 'N', REQ_FIND_PREV },
724 /* Misc */
725 { 'Q', REQ_QUIT },
726 { 'z', REQ_STOP_LOADING },
727 { 'v', REQ_SHOW_VERSION },
728 { 'r', REQ_SCREEN_REDRAW },
729 { '.', REQ_TOGGLE_LINENO },
730 { 'g', REQ_TOGGLE_REV_GRAPH },
731 { ':', REQ_PROMPT },
733 /* Using the ncurses SIGWINCH handler. */
734 { KEY_RESIZE, REQ_SCREEN_RESIZE },
735 };
737 #define KEYMAP_INFO \
738 KEYMAP_(GENERIC), \
739 KEYMAP_(MAIN), \
740 KEYMAP_(DIFF), \
741 KEYMAP_(LOG), \
742 KEYMAP_(TREE), \
743 KEYMAP_(BLOB), \
744 KEYMAP_(PAGER), \
745 KEYMAP_(HELP) \
747 enum keymap {
748 #define KEYMAP_(name) KEYMAP_##name
749 KEYMAP_INFO
750 #undef KEYMAP_
751 };
753 static struct int_map keymap_table[] = {
754 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
755 KEYMAP_INFO
756 #undef KEYMAP_
757 };
759 #define set_keymap(map, name) \
760 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
762 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
764 static void
765 add_keybinding(enum keymap keymap, enum request request, int key)
766 {
767 struct keybinding *keybinding;
769 keybinding = calloc(1, sizeof(*keybinding));
770 if (!keybinding)
771 die("Failed to allocate keybinding");
773 keybinding->alias = key;
774 keybinding->request = request;
775 keybinding->next = keybindings[keymap];
776 keybindings[keymap] = keybinding;
777 }
779 /* Looks for a key binding first in the given map, then in the generic map, and
780 * lastly in the default keybindings. */
781 static enum request
782 get_keybinding(enum keymap keymap, int key)
783 {
784 struct keybinding *kbd;
785 int i;
787 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
788 if (kbd->alias == key)
789 return kbd->request;
791 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
792 if (kbd->alias == key)
793 return kbd->request;
795 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
796 if (default_keybindings[i].alias == key)
797 return default_keybindings[i].request;
799 return (enum request) key;
800 }
803 struct key {
804 char *name;
805 int value;
806 };
808 static struct key key_table[] = {
809 { "Enter", KEY_RETURN },
810 { "Space", ' ' },
811 { "Backspace", KEY_BACKSPACE },
812 { "Tab", KEY_TAB },
813 { "Escape", KEY_ESC },
814 { "Left", KEY_LEFT },
815 { "Right", KEY_RIGHT },
816 { "Up", KEY_UP },
817 { "Down", KEY_DOWN },
818 { "Insert", KEY_IC },
819 { "Delete", KEY_DC },
820 { "Hash", '#' },
821 { "Home", KEY_HOME },
822 { "End", KEY_END },
823 { "PageUp", KEY_PPAGE },
824 { "PageDown", KEY_NPAGE },
825 { "F1", KEY_F(1) },
826 { "F2", KEY_F(2) },
827 { "F3", KEY_F(3) },
828 { "F4", KEY_F(4) },
829 { "F5", KEY_F(5) },
830 { "F6", KEY_F(6) },
831 { "F7", KEY_F(7) },
832 { "F8", KEY_F(8) },
833 { "F9", KEY_F(9) },
834 { "F10", KEY_F(10) },
835 { "F11", KEY_F(11) },
836 { "F12", KEY_F(12) },
837 };
839 static int
840 get_key_value(const char *name)
841 {
842 int i;
844 for (i = 0; i < ARRAY_SIZE(key_table); i++)
845 if (!strcasecmp(key_table[i].name, name))
846 return key_table[i].value;
848 if (strlen(name) == 1 && isprint(*name))
849 return (int) *name;
851 return ERR;
852 }
854 static char *
855 get_key(enum request request)
856 {
857 static char buf[BUFSIZ];
858 static char key_char[] = "'X'";
859 size_t pos = 0;
860 char *sep = " ";
861 int i;
863 buf[pos] = 0;
865 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
866 struct keybinding *keybinding = &default_keybindings[i];
867 char *seq = NULL;
868 int key;
870 if (keybinding->request != request)
871 continue;
873 for (key = 0; key < ARRAY_SIZE(key_table); key++)
874 if (key_table[key].value == keybinding->alias)
875 seq = key_table[key].name;
877 if (seq == NULL &&
878 keybinding->alias < 127 &&
879 isprint(keybinding->alias)) {
880 key_char[1] = (char) keybinding->alias;
881 seq = key_char;
882 }
884 if (!seq)
885 seq = "'?'";
887 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
888 return "Too many keybindings!";
889 sep = ", ";
890 }
892 return buf;
893 }
896 /*
897 * User config file handling.
898 */
900 static struct int_map color_map[] = {
901 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
902 COLOR_MAP(DEFAULT),
903 COLOR_MAP(BLACK),
904 COLOR_MAP(BLUE),
905 COLOR_MAP(CYAN),
906 COLOR_MAP(GREEN),
907 COLOR_MAP(MAGENTA),
908 COLOR_MAP(RED),
909 COLOR_MAP(WHITE),
910 COLOR_MAP(YELLOW),
911 };
913 #define set_color(color, name) \
914 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
916 static struct int_map attr_map[] = {
917 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
918 ATTR_MAP(NORMAL),
919 ATTR_MAP(BLINK),
920 ATTR_MAP(BOLD),
921 ATTR_MAP(DIM),
922 ATTR_MAP(REVERSE),
923 ATTR_MAP(STANDOUT),
924 ATTR_MAP(UNDERLINE),
925 };
927 #define set_attribute(attr, name) \
928 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
930 static int config_lineno;
931 static bool config_errors;
932 static char *config_msg;
934 /* Wants: object fgcolor bgcolor [attr] */
935 static int
936 option_color_command(int argc, char *argv[])
937 {
938 struct line_info *info;
940 if (argc != 3 && argc != 4) {
941 config_msg = "Wrong number of arguments given to color command";
942 return ERR;
943 }
945 info = get_line_info(argv[0], strlen(argv[0]));
946 if (!info) {
947 config_msg = "Unknown color name";
948 return ERR;
949 }
951 if (set_color(&info->fg, argv[1]) == ERR ||
952 set_color(&info->bg, argv[2]) == ERR) {
953 config_msg = "Unknown color";
954 return ERR;
955 }
957 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
958 config_msg = "Unknown attribute";
959 return ERR;
960 }
962 return OK;
963 }
965 /* Wants: name = value */
966 static int
967 option_set_command(int argc, char *argv[])
968 {
969 if (argc != 3) {
970 config_msg = "Wrong number of arguments given to set command";
971 return ERR;
972 }
974 if (strcmp(argv[1], "=")) {
975 config_msg = "No value assigned";
976 return ERR;
977 }
979 if (!strcmp(argv[0], "show-rev-graph")) {
980 opt_rev_graph = (!strcmp(argv[2], "1") ||
981 !strcmp(argv[2], "true") ||
982 !strcmp(argv[2], "yes"));
983 return OK;
984 }
986 if (!strcmp(argv[0], "line-number-interval")) {
987 opt_num_interval = atoi(argv[2]);
988 return OK;
989 }
991 if (!strcmp(argv[0], "tab-size")) {
992 opt_tab_size = atoi(argv[2]);
993 return OK;
994 }
996 if (!strcmp(argv[0], "commit-encoding")) {
997 char *arg = argv[2];
998 int delimiter = *arg;
999 int i;
1001 switch (delimiter) {
1002 case '"':
1003 case '\'':
1004 for (arg++, i = 0; arg[i]; i++)
1005 if (arg[i] == delimiter) {
1006 arg[i] = 0;
1007 break;
1008 }
1009 default:
1010 string_copy(opt_encoding, arg);
1011 return OK;
1012 }
1013 }
1015 config_msg = "Unknown variable name";
1016 return ERR;
1017 }
1019 /* Wants: mode request key */
1020 static int
1021 option_bind_command(int argc, char *argv[])
1022 {
1023 enum request request;
1024 int keymap;
1025 int key;
1027 if (argc != 3) {
1028 config_msg = "Wrong number of arguments given to bind command";
1029 return ERR;
1030 }
1032 if (set_keymap(&keymap, argv[0]) == ERR) {
1033 config_msg = "Unknown key map";
1034 return ERR;
1035 }
1037 key = get_key_value(argv[1]);
1038 if (key == ERR) {
1039 config_msg = "Unknown key";
1040 return ERR;
1041 }
1043 request = get_request(argv[2]);
1044 if (request == REQ_UNKNOWN) {
1045 config_msg = "Unknown request name";
1046 return ERR;
1047 }
1049 add_keybinding(keymap, request, key);
1051 return OK;
1052 }
1054 static int
1055 set_option(char *opt, char *value)
1056 {
1057 char *argv[16];
1058 int valuelen;
1059 int argc = 0;
1061 /* Tokenize */
1062 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1063 argv[argc++] = value;
1065 value += valuelen;
1066 if (!*value)
1067 break;
1069 *value++ = 0;
1070 while (isspace(*value))
1071 value++;
1072 }
1074 if (!strcmp(opt, "color"))
1075 return option_color_command(argc, argv);
1077 if (!strcmp(opt, "set"))
1078 return option_set_command(argc, argv);
1080 if (!strcmp(opt, "bind"))
1081 return option_bind_command(argc, argv);
1083 config_msg = "Unknown option command";
1084 return ERR;
1085 }
1087 static int
1088 read_option(char *opt, int optlen, char *value, int valuelen)
1089 {
1090 int status = OK;
1092 config_lineno++;
1093 config_msg = "Internal error";
1095 /* Check for comment markers, since read_properties() will
1096 * only ensure opt and value are split at first " \t". */
1097 optlen = strcspn(opt, "#");
1098 if (optlen == 0)
1099 return OK;
1101 if (opt[optlen] != 0) {
1102 config_msg = "No option value";
1103 status = ERR;
1105 } else {
1106 /* Look for comment endings in the value. */
1107 int len = strcspn(value, "#");
1109 if (len < valuelen) {
1110 valuelen = len;
1111 value[valuelen] = 0;
1112 }
1114 status = set_option(opt, value);
1115 }
1117 if (status == ERR) {
1118 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1119 config_lineno, optlen, opt, config_msg);
1120 config_errors = TRUE;
1121 }
1123 /* Always keep going if errors are encountered. */
1124 return OK;
1125 }
1127 static int
1128 load_options(void)
1129 {
1130 char *home = getenv("HOME");
1131 char buf[SIZEOF_STR];
1132 FILE *file;
1134 config_lineno = 0;
1135 config_errors = FALSE;
1137 if (!home || !string_format(buf, "%s/.tigrc", home))
1138 return ERR;
1140 /* It's ok that the file doesn't exist. */
1141 file = fopen(buf, "r");
1142 if (!file)
1143 return OK;
1145 if (read_properties(file, " \t", read_option) == ERR ||
1146 config_errors == TRUE)
1147 fprintf(stderr, "Errors while loading %s.\n", buf);
1149 return OK;
1150 }
1153 /*
1154 * The viewer
1155 */
1157 struct view;
1158 struct view_ops;
1160 /* The display array of active views and the index of the current view. */
1161 static struct view *display[2];
1162 static unsigned int current_view;
1164 /* Reading from the prompt? */
1165 static bool input_mode = FALSE;
1167 #define foreach_displayed_view(view, i) \
1168 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1170 #define displayed_views() (display[1] != NULL ? 2 : 1)
1172 /* Current head and commit ID */
1173 static char ref_blob[SIZEOF_REF] = "";
1174 static char ref_commit[SIZEOF_REF] = "HEAD";
1175 static char ref_head[SIZEOF_REF] = "HEAD";
1177 struct view {
1178 const char *name; /* View name */
1179 const char *cmd_fmt; /* Default command line format */
1180 const char *cmd_env; /* Command line set via environment */
1181 const char *id; /* Points to either of ref_{head,commit,blob} */
1183 struct view_ops *ops; /* View operations */
1185 enum keymap keymap; /* What keymap does this view have */
1187 char cmd[SIZEOF_STR]; /* Command buffer */
1188 char ref[SIZEOF_REF]; /* Hovered commit reference */
1189 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1191 int height, width; /* The width and height of the main window */
1192 WINDOW *win; /* The main window */
1193 WINDOW *title; /* The title window living below the main window */
1195 /* Navigation */
1196 unsigned long offset; /* Offset of the window top */
1197 unsigned long lineno; /* Current line number */
1199 /* Searching */
1200 char grep[SIZEOF_STR]; /* Search string */
1201 regex_t *regex; /* Pre-compiled regex */
1203 /* If non-NULL, points to the view that opened this view. If this view
1204 * is closed tig will switch back to the parent view. */
1205 struct view *parent;
1207 /* Buffering */
1208 unsigned long lines; /* Total number of lines */
1209 struct line *line; /* Line index */
1210 unsigned long line_size;/* Total number of allocated lines */
1211 unsigned int digits; /* Number of digits in the lines member. */
1213 /* Loading */
1214 FILE *pipe;
1215 time_t start_time;
1216 };
1218 struct view_ops {
1219 /* What type of content being displayed. Used in the title bar. */
1220 const char *type;
1221 /* Draw one line; @lineno must be < view->height. */
1222 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1223 /* Read one line; updates view->line. */
1224 bool (*read)(struct view *view, char *data);
1225 /* Depending on view, change display based on current line. */
1226 bool (*enter)(struct view *view, struct line *line);
1227 /* Search for regex in a line. */
1228 bool (*grep)(struct view *view, struct line *line);
1229 /* Select line */
1230 void (*select)(struct view *view, struct line *line);
1231 };
1233 static struct view_ops pager_ops;
1234 static struct view_ops main_ops;
1235 static struct view_ops tree_ops;
1236 static struct view_ops blob_ops;
1238 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1239 { name, cmd, #env, ref, ops, map}
1241 #define VIEW_(id, name, ops, ref) \
1242 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1245 static struct view views[] = {
1246 VIEW_(MAIN, "main", &main_ops, ref_head),
1247 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1248 VIEW_(LOG, "log", &pager_ops, ref_head),
1249 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1250 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1251 VIEW_(HELP, "help", &pager_ops, "static"),
1252 VIEW_(PAGER, "pager", &pager_ops, "static"),
1253 };
1255 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1257 #define foreach_view(view, i) \
1258 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1260 #define view_is_displayed(view) \
1261 (view == display[0] || view == display[1])
1263 static bool
1264 draw_view_line(struct view *view, unsigned int lineno)
1265 {
1266 struct line *line;
1267 bool selected = (view->offset + lineno == view->lineno);
1268 bool draw_ok;
1270 assert(view_is_displayed(view));
1272 if (view->offset + lineno >= view->lines)
1273 return FALSE;
1275 line = &view->line[view->offset + lineno];
1277 if (selected) {
1278 line->selected = TRUE;
1279 view->ops->select(view, line);
1280 } else if (line->selected) {
1281 line->selected = FALSE;
1282 wmove(view->win, lineno, 0);
1283 wclrtoeol(view->win);
1284 }
1286 scrollok(view->win, FALSE);
1287 draw_ok = view->ops->draw(view, line, lineno, selected);
1288 scrollok(view->win, TRUE);
1290 return draw_ok;
1291 }
1293 static void
1294 redraw_view_from(struct view *view, int lineno)
1295 {
1296 assert(0 <= lineno && lineno < view->height);
1298 for (; lineno < view->height; lineno++) {
1299 if (!draw_view_line(view, lineno))
1300 break;
1301 }
1303 redrawwin(view->win);
1304 if (input_mode)
1305 wnoutrefresh(view->win);
1306 else
1307 wrefresh(view->win);
1308 }
1310 static void
1311 redraw_view(struct view *view)
1312 {
1313 wclear(view->win);
1314 redraw_view_from(view, 0);
1315 }
1318 static void
1319 update_view_title(struct view *view)
1320 {
1321 char buf[SIZEOF_STR];
1322 char state[SIZEOF_STR];
1323 size_t bufpos = 0, statelen = 0;
1325 assert(view_is_displayed(view));
1327 if (view->lines || view->pipe) {
1328 unsigned int view_lines = view->offset + view->height;
1329 unsigned int lines = view->lines
1330 ? MIN(view_lines, view->lines) * 100 / view->lines
1331 : 0;
1333 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1334 view->ops->type,
1335 view->lineno + 1,
1336 view->lines,
1337 lines);
1339 if (view->pipe) {
1340 time_t secs = time(NULL) - view->start_time;
1342 /* Three git seconds are a long time ... */
1343 if (secs > 2)
1344 string_format_from(state, &statelen, " %lds", secs);
1345 }
1346 }
1348 string_format_from(buf, &bufpos, "[%s]", view->name);
1349 if (*view->ref && bufpos < view->width) {
1350 size_t refsize = strlen(view->ref);
1351 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1353 if (minsize < view->width)
1354 refsize = view->width - minsize + 7;
1355 string_format_from(buf, &bufpos, " %.*s", refsize, view->ref);
1356 }
1358 if (statelen && bufpos < view->width) {
1359 string_format_from(buf, &bufpos, " %s", state);
1360 }
1362 if (view == display[current_view])
1363 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1364 else
1365 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1367 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1368 wclrtoeol(view->title);
1369 wmove(view->title, 0, view->width - 1);
1371 if (input_mode)
1372 wnoutrefresh(view->title);
1373 else
1374 wrefresh(view->title);
1375 }
1377 static void
1378 resize_display(void)
1379 {
1380 int offset, i;
1381 struct view *base = display[0];
1382 struct view *view = display[1] ? display[1] : display[0];
1384 /* Setup window dimensions */
1386 getmaxyx(stdscr, base->height, base->width);
1388 /* Make room for the status window. */
1389 base->height -= 1;
1391 if (view != base) {
1392 /* Horizontal split. */
1393 view->width = base->width;
1394 view->height = SCALE_SPLIT_VIEW(base->height);
1395 base->height -= view->height;
1397 /* Make room for the title bar. */
1398 view->height -= 1;
1399 }
1401 /* Make room for the title bar. */
1402 base->height -= 1;
1404 offset = 0;
1406 foreach_displayed_view (view, i) {
1407 if (!view->win) {
1408 view->win = newwin(view->height, 0, offset, 0);
1409 if (!view->win)
1410 die("Failed to create %s view", view->name);
1412 scrollok(view->win, TRUE);
1414 view->title = newwin(1, 0, offset + view->height, 0);
1415 if (!view->title)
1416 die("Failed to create title window");
1418 } else {
1419 wresize(view->win, view->height, view->width);
1420 mvwin(view->win, offset, 0);
1421 mvwin(view->title, offset + view->height, 0);
1422 }
1424 offset += view->height + 1;
1425 }
1426 }
1428 static void
1429 redraw_display(void)
1430 {
1431 struct view *view;
1432 int i;
1434 foreach_displayed_view (view, i) {
1435 redraw_view(view);
1436 update_view_title(view);
1437 }
1438 }
1440 static void
1441 update_display_cursor(struct view *view)
1442 {
1443 /* Move the cursor to the right-most column of the cursor line.
1444 *
1445 * XXX: This could turn out to be a bit expensive, but it ensures that
1446 * the cursor does not jump around. */
1447 if (view->lines) {
1448 wmove(view->win, view->lineno - view->offset, view->width - 1);
1449 wrefresh(view->win);
1450 }
1451 }
1453 /*
1454 * Navigation
1455 */
1457 /* Scrolling backend */
1458 static void
1459 do_scroll_view(struct view *view, int lines)
1460 {
1461 bool redraw_current_line = FALSE;
1463 /* The rendering expects the new offset. */
1464 view->offset += lines;
1466 assert(0 <= view->offset && view->offset < view->lines);
1467 assert(lines);
1469 /* Move current line into the view. */
1470 if (view->lineno < view->offset) {
1471 view->lineno = view->offset;
1472 redraw_current_line = TRUE;
1473 } else if (view->lineno >= view->offset + view->height) {
1474 view->lineno = view->offset + view->height - 1;
1475 redraw_current_line = TRUE;
1476 }
1478 assert(view->offset <= view->lineno && view->lineno < view->lines);
1480 /* Redraw the whole screen if scrolling is pointless. */
1481 if (view->height < ABS(lines)) {
1482 redraw_view(view);
1484 } else {
1485 int line = lines > 0 ? view->height - lines : 0;
1486 int end = line + ABS(lines);
1488 wscrl(view->win, lines);
1490 for (; line < end; line++) {
1491 if (!draw_view_line(view, line))
1492 break;
1493 }
1495 if (redraw_current_line)
1496 draw_view_line(view, view->lineno - view->offset);
1497 }
1499 redrawwin(view->win);
1500 wrefresh(view->win);
1501 report("");
1502 }
1504 /* Scroll frontend */
1505 static void
1506 scroll_view(struct view *view, enum request request)
1507 {
1508 int lines = 1;
1510 assert(view_is_displayed(view));
1512 switch (request) {
1513 case REQ_SCROLL_PAGE_DOWN:
1514 lines = view->height;
1515 case REQ_SCROLL_LINE_DOWN:
1516 if (view->offset + lines > view->lines)
1517 lines = view->lines - view->offset;
1519 if (lines == 0 || view->offset + view->height >= view->lines) {
1520 report("Cannot scroll beyond the last line");
1521 return;
1522 }
1523 break;
1525 case REQ_SCROLL_PAGE_UP:
1526 lines = view->height;
1527 case REQ_SCROLL_LINE_UP:
1528 if (lines > view->offset)
1529 lines = view->offset;
1531 if (lines == 0) {
1532 report("Cannot scroll beyond the first line");
1533 return;
1534 }
1536 lines = -lines;
1537 break;
1539 default:
1540 die("request %d not handled in switch", request);
1541 }
1543 do_scroll_view(view, lines);
1544 }
1546 /* Cursor moving */
1547 static void
1548 move_view(struct view *view, enum request request)
1549 {
1550 int scroll_steps = 0;
1551 int steps;
1553 switch (request) {
1554 case REQ_MOVE_FIRST_LINE:
1555 steps = -view->lineno;
1556 break;
1558 case REQ_MOVE_LAST_LINE:
1559 steps = view->lines - view->lineno - 1;
1560 break;
1562 case REQ_MOVE_PAGE_UP:
1563 steps = view->height > view->lineno
1564 ? -view->lineno : -view->height;
1565 break;
1567 case REQ_MOVE_PAGE_DOWN:
1568 steps = view->lineno + view->height >= view->lines
1569 ? view->lines - view->lineno - 1 : view->height;
1570 break;
1572 case REQ_MOVE_UP:
1573 steps = -1;
1574 break;
1576 case REQ_MOVE_DOWN:
1577 steps = 1;
1578 break;
1580 default:
1581 die("request %d not handled in switch", request);
1582 }
1584 if (steps <= 0 && view->lineno == 0) {
1585 report("Cannot move beyond the first line");
1586 return;
1588 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1589 report("Cannot move beyond the last line");
1590 return;
1591 }
1593 /* Move the current line */
1594 view->lineno += steps;
1595 assert(0 <= view->lineno && view->lineno < view->lines);
1597 /* Check whether the view needs to be scrolled */
1598 if (view->lineno < view->offset ||
1599 view->lineno >= view->offset + view->height) {
1600 scroll_steps = steps;
1601 if (steps < 0 && -steps > view->offset) {
1602 scroll_steps = -view->offset;
1604 } else if (steps > 0) {
1605 if (view->lineno == view->lines - 1 &&
1606 view->lines > view->height) {
1607 scroll_steps = view->lines - view->offset - 1;
1608 if (scroll_steps >= view->height)
1609 scroll_steps -= view->height - 1;
1610 }
1611 }
1612 }
1614 if (!view_is_displayed(view)) {
1615 view->offset += steps;
1616 view->ops->select(view, &view->line[view->lineno]);
1617 return;
1618 }
1620 /* Repaint the old "current" line if we be scrolling */
1621 if (ABS(steps) < view->height)
1622 draw_view_line(view, view->lineno - steps - view->offset);
1624 if (scroll_steps) {
1625 do_scroll_view(view, scroll_steps);
1626 return;
1627 }
1629 /* Draw the current line */
1630 draw_view_line(view, view->lineno - view->offset);
1632 redrawwin(view->win);
1633 wrefresh(view->win);
1634 report("");
1635 }
1638 /*
1639 * Searching
1640 */
1642 static void search_view(struct view *view, enum request request);
1644 static bool
1645 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1646 {
1647 assert(view_is_displayed(view));
1649 if (!view->ops->grep(view, line))
1650 return FALSE;
1652 if (lineno - view->offset >= view->height) {
1653 view->offset = lineno;
1654 view->lineno = lineno;
1655 redraw_view(view);
1657 } else {
1658 unsigned long old_lineno = view->lineno - view->offset;
1660 view->lineno = lineno;
1661 draw_view_line(view, old_lineno);
1663 draw_view_line(view, view->lineno - view->offset);
1664 redrawwin(view->win);
1665 wrefresh(view->win);
1666 }
1668 report("Line %ld matches '%s'", lineno + 1, view->grep);
1669 return TRUE;
1670 }
1672 static void
1673 find_next(struct view *view, enum request request)
1674 {
1675 unsigned long lineno = view->lineno;
1676 int direction;
1678 if (!*view->grep) {
1679 if (!*opt_search)
1680 report("No previous search");
1681 else
1682 search_view(view, request);
1683 return;
1684 }
1686 switch (request) {
1687 case REQ_SEARCH:
1688 case REQ_FIND_NEXT:
1689 direction = 1;
1690 break;
1692 case REQ_SEARCH_BACK:
1693 case REQ_FIND_PREV:
1694 direction = -1;
1695 break;
1697 default:
1698 return;
1699 }
1701 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1702 lineno += direction;
1704 /* Note, lineno is unsigned long so will wrap around in which case it
1705 * will become bigger than view->lines. */
1706 for (; lineno < view->lines; lineno += direction) {
1707 struct line *line = &view->line[lineno];
1709 if (find_next_line(view, lineno, line))
1710 return;
1711 }
1713 report("No match found for '%s'", view->grep);
1714 }
1716 static void
1717 search_view(struct view *view, enum request request)
1718 {
1719 int regex_err;
1721 if (view->regex) {
1722 regfree(view->regex);
1723 *view->grep = 0;
1724 } else {
1725 view->regex = calloc(1, sizeof(*view->regex));
1726 if (!view->regex)
1727 return;
1728 }
1730 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1731 if (regex_err != 0) {
1732 char buf[SIZEOF_STR] = "unknown error";
1734 regerror(regex_err, view->regex, buf, sizeof(buf));
1735 report("Search failed: %s", buf);
1736 return;
1737 }
1739 string_copy(view->grep, opt_search);
1741 find_next(view, request);
1742 }
1744 /*
1745 * Incremental updating
1746 */
1748 static void
1749 end_update(struct view *view)
1750 {
1751 if (!view->pipe)
1752 return;
1753 set_nonblocking_input(FALSE);
1754 if (view->pipe == stdin)
1755 fclose(view->pipe);
1756 else
1757 pclose(view->pipe);
1758 view->pipe = NULL;
1759 }
1761 static bool
1762 begin_update(struct view *view)
1763 {
1764 const char *id = view->id;
1766 if (view->pipe)
1767 end_update(view);
1769 if (opt_cmd[0]) {
1770 string_copy(view->cmd, opt_cmd);
1771 opt_cmd[0] = 0;
1772 /* When running random commands, the view ref could have become
1773 * invalid so clear it. */
1774 view->ref[0] = 0;
1776 } else if (view == VIEW(REQ_VIEW_TREE)) {
1777 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1779 if (strcmp(view->vid, view->id))
1780 opt_path[0] = 0;
1782 if (!string_format(view->cmd, format, id, opt_path))
1783 return FALSE;
1785 } else {
1786 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1788 if (!string_format(view->cmd, format, id, id, id, id, id))
1789 return FALSE;
1790 }
1792 /* Special case for the pager view. */
1793 if (opt_pipe) {
1794 view->pipe = opt_pipe;
1795 opt_pipe = NULL;
1796 } else {
1797 view->pipe = popen(view->cmd, "r");
1798 }
1800 if (!view->pipe)
1801 return FALSE;
1803 set_nonblocking_input(TRUE);
1805 view->offset = 0;
1806 view->lines = 0;
1807 view->lineno = 0;
1808 string_copy(view->vid, id);
1810 if (view->line) {
1811 int i;
1813 for (i = 0; i < view->lines; i++)
1814 if (view->line[i].data)
1815 free(view->line[i].data);
1817 free(view->line);
1818 view->line = NULL;
1819 }
1821 view->start_time = time(NULL);
1823 return TRUE;
1824 }
1826 static struct line *
1827 realloc_lines(struct view *view, size_t line_size)
1828 {
1829 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1831 if (!tmp)
1832 return NULL;
1834 view->line = tmp;
1835 view->line_size = line_size;
1836 return view->line;
1837 }
1839 static bool
1840 update_view(struct view *view)
1841 {
1842 char in_buffer[BUFSIZ];
1843 char out_buffer[BUFSIZ * 2];
1844 char *line;
1845 /* The number of lines to read. If too low it will cause too much
1846 * redrawing (and possible flickering), if too high responsiveness
1847 * will suffer. */
1848 unsigned long lines = view->height;
1849 int redraw_from = -1;
1851 if (!view->pipe)
1852 return TRUE;
1854 /* Only redraw if lines are visible. */
1855 if (view->offset + view->height >= view->lines)
1856 redraw_from = view->lines - view->offset;
1858 /* FIXME: This is probably not perfect for backgrounded views. */
1859 if (!realloc_lines(view, view->lines + lines))
1860 goto alloc_error;
1862 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1863 size_t linelen = strlen(line);
1865 if (linelen)
1866 line[linelen - 1] = 0;
1868 if (opt_iconv != ICONV_NONE) {
1869 char *inbuf = line;
1870 size_t inlen = linelen;
1872 char *outbuf = out_buffer;
1873 size_t outlen = sizeof(out_buffer);
1875 size_t ret;
1877 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1878 if (ret != (size_t) -1) {
1879 line = out_buffer;
1880 linelen = strlen(out_buffer);
1881 }
1882 }
1884 if (!view->ops->read(view, line))
1885 goto alloc_error;
1887 if (lines-- == 1)
1888 break;
1889 }
1891 {
1892 int digits;
1894 lines = view->lines;
1895 for (digits = 0; lines; digits++)
1896 lines /= 10;
1898 /* Keep the displayed view in sync with line number scaling. */
1899 if (digits != view->digits) {
1900 view->digits = digits;
1901 redraw_from = 0;
1902 }
1903 }
1905 if (!view_is_displayed(view))
1906 goto check_pipe;
1908 if (view == VIEW(REQ_VIEW_TREE)) {
1909 /* Clear the view and redraw everything since the tree sorting
1910 * might have rearranged things. */
1911 redraw_view(view);
1913 } else if (redraw_from >= 0) {
1914 /* If this is an incremental update, redraw the previous line
1915 * since for commits some members could have changed when
1916 * loading the main view. */
1917 if (redraw_from > 0)
1918 redraw_from--;
1920 /* Incrementally draw avoids flickering. */
1921 redraw_view_from(view, redraw_from);
1922 }
1924 /* Update the title _after_ the redraw so that if the redraw picks up a
1925 * commit reference in view->ref it'll be available here. */
1926 update_view_title(view);
1928 check_pipe:
1929 if (ferror(view->pipe)) {
1930 report("Failed to read: %s", strerror(errno));
1931 goto end;
1933 } else if (feof(view->pipe)) {
1934 report("");
1935 goto end;
1936 }
1938 return TRUE;
1940 alloc_error:
1941 report("Allocation failure");
1943 end:
1944 end_update(view);
1945 return FALSE;
1946 }
1949 /*
1950 * View opening
1951 */
1953 static void open_help_view(struct view *view)
1954 {
1955 char buf[BUFSIZ];
1956 int lines = ARRAY_SIZE(req_info) + 2;
1957 int i;
1959 if (view->lines > 0)
1960 return;
1962 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1963 if (!req_info[i].request)
1964 lines++;
1966 view->line = calloc(lines, sizeof(*view->line));
1967 if (!view->line) {
1968 report("Allocation failure");
1969 return;
1970 }
1972 view->ops->read(view, "Quick reference for tig keybindings:");
1974 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1975 char *key;
1977 if (!req_info[i].request) {
1978 view->ops->read(view, "");
1979 view->ops->read(view, req_info[i].help);
1980 continue;
1981 }
1983 key = get_key(req_info[i].request);
1984 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1985 continue;
1987 view->ops->read(view, buf);
1988 }
1989 }
1991 enum open_flags {
1992 OPEN_DEFAULT = 0, /* Use default view switching. */
1993 OPEN_SPLIT = 1, /* Split current view. */
1994 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1995 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1996 };
1998 static void
1999 open_view(struct view *prev, enum request request, enum open_flags flags)
2000 {
2001 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2002 bool split = !!(flags & OPEN_SPLIT);
2003 bool reload = !!(flags & OPEN_RELOAD);
2004 struct view *view = VIEW(request);
2005 int nviews = displayed_views();
2006 struct view *base_view = display[0];
2008 if (view == prev && nviews == 1 && !reload) {
2009 report("Already in %s view", view->name);
2010 return;
2011 }
2013 if (view == VIEW(REQ_VIEW_HELP)) {
2014 open_help_view(view);
2016 } else if ((reload || strcmp(view->vid, view->id)) &&
2017 !begin_update(view)) {
2018 report("Failed to load %s view", view->name);
2019 return;
2020 }
2022 if (split) {
2023 display[1] = view;
2024 if (!backgrounded)
2025 current_view = 1;
2026 } else {
2027 /* Maximize the current view. */
2028 memset(display, 0, sizeof(display));
2029 current_view = 0;
2030 display[current_view] = view;
2031 }
2033 /* Resize the view when switching between split- and full-screen,
2034 * or when switching between two different full-screen views. */
2035 if (nviews != displayed_views() ||
2036 (nviews == 1 && base_view != display[0]))
2037 resize_display();
2039 if (split && prev->lineno - prev->offset >= prev->height) {
2040 /* Take the title line into account. */
2041 int lines = prev->lineno - prev->offset - prev->height + 1;
2043 /* Scroll the view that was split if the current line is
2044 * outside the new limited view. */
2045 do_scroll_view(prev, lines);
2046 }
2048 if (prev && view != prev) {
2049 if (split && !backgrounded) {
2050 /* "Blur" the previous view. */
2051 update_view_title(prev);
2052 }
2054 view->parent = prev;
2055 }
2057 if (view->pipe && view->lines == 0) {
2058 /* Clear the old view and let the incremental updating refill
2059 * the screen. */
2060 wclear(view->win);
2061 report("");
2062 } else {
2063 redraw_view(view);
2064 report("");
2065 }
2067 /* If the view is backgrounded the above calls to report()
2068 * won't redraw the view title. */
2069 if (backgrounded)
2070 update_view_title(view);
2071 }
2074 /*
2075 * User request switch noodle
2076 */
2078 static int
2079 view_driver(struct view *view, enum request request)
2080 {
2081 int i;
2083 switch (request) {
2084 case REQ_MOVE_UP:
2085 case REQ_MOVE_DOWN:
2086 case REQ_MOVE_PAGE_UP:
2087 case REQ_MOVE_PAGE_DOWN:
2088 case REQ_MOVE_FIRST_LINE:
2089 case REQ_MOVE_LAST_LINE:
2090 move_view(view, request);
2091 break;
2093 case REQ_SCROLL_LINE_DOWN:
2094 case REQ_SCROLL_LINE_UP:
2095 case REQ_SCROLL_PAGE_DOWN:
2096 case REQ_SCROLL_PAGE_UP:
2097 scroll_view(view, request);
2098 break;
2100 case REQ_VIEW_BLOB:
2101 if (!ref_blob[0]) {
2102 report("No file chosen, press 't' to open tree view");
2103 break;
2104 }
2105 /* Fall-through */
2106 case REQ_VIEW_MAIN:
2107 case REQ_VIEW_DIFF:
2108 case REQ_VIEW_LOG:
2109 case REQ_VIEW_TREE:
2110 case REQ_VIEW_HELP:
2111 case REQ_VIEW_PAGER:
2112 open_view(view, request, OPEN_DEFAULT);
2113 break;
2115 case REQ_NEXT:
2116 case REQ_PREVIOUS:
2117 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2119 if ((view == VIEW(REQ_VIEW_DIFF) &&
2120 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2121 (view == VIEW(REQ_VIEW_BLOB) &&
2122 view->parent == VIEW(REQ_VIEW_TREE))) {
2123 view = view->parent;
2124 move_view(view, request);
2125 if (view_is_displayed(view))
2126 update_view_title(view);
2127 } else {
2128 move_view(view, request);
2129 break;
2130 }
2131 /* Fall-through */
2133 case REQ_ENTER:
2134 if (!view->lines) {
2135 report("Nothing to enter");
2136 break;
2137 }
2138 return view->ops->enter(view, &view->line[view->lineno]);
2140 case REQ_VIEW_NEXT:
2141 {
2142 int nviews = displayed_views();
2143 int next_view = (current_view + 1) % nviews;
2145 if (next_view == current_view) {
2146 report("Only one view is displayed");
2147 break;
2148 }
2150 current_view = next_view;
2151 /* Blur out the title of the previous view. */
2152 update_view_title(view);
2153 report("");
2154 break;
2155 }
2156 case REQ_TOGGLE_LINENO:
2157 opt_line_number = !opt_line_number;
2158 redraw_display();
2159 break;
2161 case REQ_TOGGLE_REV_GRAPH:
2162 opt_rev_graph = !opt_rev_graph;
2163 redraw_display();
2164 break;
2166 case REQ_PROMPT:
2167 /* Always reload^Wrerun commands from the prompt. */
2168 open_view(view, opt_request, OPEN_RELOAD);
2169 break;
2171 case REQ_SEARCH:
2172 case REQ_SEARCH_BACK:
2173 search_view(view, request);
2174 break;
2176 case REQ_FIND_NEXT:
2177 case REQ_FIND_PREV:
2178 find_next(view, request);
2179 break;
2181 case REQ_STOP_LOADING:
2182 for (i = 0; i < ARRAY_SIZE(views); i++) {
2183 view = &views[i];
2184 if (view->pipe)
2185 report("Stopped loading the %s view", view->name),
2186 end_update(view);
2187 }
2188 break;
2190 case REQ_SHOW_VERSION:
2191 report("%s (built %s)", VERSION, __DATE__);
2192 return TRUE;
2194 case REQ_SCREEN_RESIZE:
2195 resize_display();
2196 /* Fall-through */
2197 case REQ_SCREEN_REDRAW:
2198 redraw_display();
2199 break;
2201 case REQ_NONE:
2202 doupdate();
2203 return TRUE;
2205 case REQ_VIEW_CLOSE:
2206 /* XXX: Mark closed views by letting view->parent point to the
2207 * view itself. Parents to closed view should never be
2208 * followed. */
2209 if (view->parent &&
2210 view->parent->parent != view->parent) {
2211 memset(display, 0, sizeof(display));
2212 current_view = 0;
2213 display[current_view] = view->parent;
2214 view->parent = view;
2215 resize_display();
2216 redraw_display();
2217 break;
2218 }
2219 /* Fall-through */
2220 case REQ_QUIT:
2221 return FALSE;
2223 default:
2224 /* An unknown key will show most commonly used commands. */
2225 report("Unknown key, press 'h' for help");
2226 return TRUE;
2227 }
2229 return TRUE;
2230 }
2233 /*
2234 * Pager backend
2235 */
2237 static bool
2238 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2239 {
2240 char *text = line->data;
2241 enum line_type type = line->type;
2242 int textlen = strlen(text);
2243 int attr;
2245 wmove(view->win, lineno, 0);
2247 if (selected) {
2248 type = LINE_CURSOR;
2249 wchgat(view->win, -1, 0, type, NULL);
2250 }
2252 attr = get_line_attr(type);
2253 wattrset(view->win, attr);
2255 if (opt_line_number || opt_tab_size < TABSIZE) {
2256 static char spaces[] = " ";
2257 int col_offset = 0, col = 0;
2259 if (opt_line_number) {
2260 unsigned long real_lineno = view->offset + lineno + 1;
2262 if (real_lineno == 1 ||
2263 (real_lineno % opt_num_interval) == 0) {
2264 wprintw(view->win, "%.*d", view->digits, real_lineno);
2266 } else {
2267 waddnstr(view->win, spaces,
2268 MIN(view->digits, STRING_SIZE(spaces)));
2269 }
2270 waddstr(view->win, ": ");
2271 col_offset = view->digits + 2;
2272 }
2274 while (text && col_offset + col < view->width) {
2275 int cols_max = view->width - col_offset - col;
2276 char *pos = text;
2277 int cols;
2279 if (*text == '\t') {
2280 text++;
2281 assert(sizeof(spaces) > TABSIZE);
2282 pos = spaces;
2283 cols = opt_tab_size - (col % opt_tab_size);
2285 } else {
2286 text = strchr(text, '\t');
2287 cols = line ? text - pos : strlen(pos);
2288 }
2290 waddnstr(view->win, pos, MIN(cols, cols_max));
2291 col += cols;
2292 }
2294 } else {
2295 int col = 0, pos = 0;
2297 for (; pos < textlen && col < view->width; pos++, col++)
2298 if (text[pos] == '\t')
2299 col += TABSIZE - (col % TABSIZE) - 1;
2301 waddnstr(view->win, text, pos);
2302 }
2304 return TRUE;
2305 }
2307 static bool
2308 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2309 {
2310 char refbuf[SIZEOF_STR];
2311 char *ref = NULL;
2312 FILE *pipe;
2314 if (!string_format(refbuf, "git describe %s", commit_id))
2315 return TRUE;
2317 pipe = popen(refbuf, "r");
2318 if (!pipe)
2319 return TRUE;
2321 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2322 ref = chomp_string(ref);
2323 pclose(pipe);
2325 if (!ref || !*ref)
2326 return TRUE;
2328 /* This is the only fatal call, since it can "corrupt" the buffer. */
2329 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2330 return FALSE;
2332 return TRUE;
2333 }
2335 static void
2336 add_pager_refs(struct view *view, struct line *line)
2337 {
2338 char buf[SIZEOF_STR];
2339 char *commit_id = line->data + STRING_SIZE("commit ");
2340 struct ref **refs;
2341 size_t bufpos = 0, refpos = 0;
2342 const char *sep = "Refs: ";
2343 bool is_tag = FALSE;
2345 assert(line->type == LINE_COMMIT);
2347 refs = get_refs(commit_id);
2348 if (!refs) {
2349 if (view == VIEW(REQ_VIEW_DIFF))
2350 goto try_add_describe_ref;
2351 return;
2352 }
2354 do {
2355 struct ref *ref = refs[refpos];
2356 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
2358 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2359 return;
2360 sep = ", ";
2361 if (ref->tag)
2362 is_tag = TRUE;
2363 } while (refs[refpos++]->next);
2365 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2366 try_add_describe_ref:
2367 /* Add <tag>-g<commit_id> "fake" reference. */
2368 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2369 return;
2370 }
2372 if (bufpos == 0)
2373 return;
2375 if (!realloc_lines(view, view->line_size + 1))
2376 return;
2378 line = &view->line[view->lines];
2379 line->data = strdup(buf);
2380 if (!line->data)
2381 return;
2383 line->type = LINE_PP_REFS;
2384 view->lines++;
2385 }
2387 static bool
2388 pager_read(struct view *view, char *data)
2389 {
2390 struct line *line = &view->line[view->lines];
2392 line->data = strdup(data);
2393 if (!line->data)
2394 return FALSE;
2396 line->type = get_line_type(line->data);
2397 view->lines++;
2399 if (line->type == LINE_COMMIT &&
2400 (view == VIEW(REQ_VIEW_DIFF) ||
2401 view == VIEW(REQ_VIEW_LOG)))
2402 add_pager_refs(view, line);
2404 return TRUE;
2405 }
2407 static bool
2408 pager_enter(struct view *view, struct line *line)
2409 {
2410 int split = 0;
2412 if (line->type == LINE_COMMIT &&
2413 (view == VIEW(REQ_VIEW_LOG) ||
2414 view == VIEW(REQ_VIEW_PAGER))) {
2415 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2416 split = 1;
2417 }
2419 /* Always scroll the view even if it was split. That way
2420 * you can use Enter to scroll through the log view and
2421 * split open each commit diff. */
2422 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2424 /* FIXME: A minor workaround. Scrolling the view will call report("")
2425 * but if we are scrolling a non-current view this won't properly
2426 * update the view title. */
2427 if (split)
2428 update_view_title(view);
2430 return TRUE;
2431 }
2433 static bool
2434 pager_grep(struct view *view, struct line *line)
2435 {
2436 regmatch_t pmatch;
2437 char *text = line->data;
2439 if (!*text)
2440 return FALSE;
2442 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2443 return FALSE;
2445 return TRUE;
2446 }
2448 static void
2449 pager_select(struct view *view, struct line *line)
2450 {
2451 if (line->type == LINE_COMMIT) {
2452 char *text = line->data;
2454 string_copy(view->ref, text + STRING_SIZE("commit "));
2455 string_copy(ref_commit, view->ref);
2456 }
2457 }
2459 static struct view_ops pager_ops = {
2460 "line",
2461 pager_draw,
2462 pager_read,
2463 pager_enter,
2464 pager_grep,
2465 pager_select,
2466 };
2469 /*
2470 * Tree backend
2471 */
2473 /* Parse output from git-ls-tree(1):
2474 *
2475 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2476 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2477 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2478 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2479 */
2481 #define SIZEOF_TREE_ATTR \
2482 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2484 #define TREE_UP_FORMAT "040000 tree %s\t.."
2486 static int
2487 tree_compare_entry(enum line_type type1, char *name1,
2488 enum line_type type2, char *name2)
2489 {
2490 if (type1 != type2) {
2491 if (type1 == LINE_TREE_DIR)
2492 return -1;
2493 return 1;
2494 }
2496 return strcmp(name1, name2);
2497 }
2499 static bool
2500 tree_read(struct view *view, char *text)
2501 {
2502 size_t textlen = strlen(text);
2503 char buf[SIZEOF_STR];
2504 unsigned long pos;
2505 enum line_type type;
2506 bool first_read = view->lines == 0;
2508 if (textlen <= SIZEOF_TREE_ATTR)
2509 return FALSE;
2511 type = text[STRING_SIZE("100644 ")] == 't'
2512 ? LINE_TREE_DIR : LINE_TREE_FILE;
2514 if (first_read) {
2515 /* Add path info line */
2516 if (string_format(buf, "Directory path /%s", opt_path) &&
2517 realloc_lines(view, view->line_size + 1) &&
2518 pager_read(view, buf))
2519 view->line[view->lines - 1].type = LINE_DEFAULT;
2520 else
2521 return FALSE;
2523 /* Insert "link" to parent directory. */
2524 if (*opt_path &&
2525 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2526 realloc_lines(view, view->line_size + 1) &&
2527 pager_read(view, buf))
2528 view->line[view->lines - 1].type = LINE_TREE_DIR;
2529 else if (*opt_path)
2530 return FALSE;
2531 }
2533 /* Strip the path part ... */
2534 if (*opt_path) {
2535 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2536 size_t striplen = strlen(opt_path);
2537 char *path = text + SIZEOF_TREE_ATTR;
2539 if (pathlen > striplen)
2540 memmove(path, path + striplen,
2541 pathlen - striplen + 1);
2542 }
2544 /* Skip "Directory ..." and ".." line. */
2545 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2546 struct line *line = &view->line[pos];
2547 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2548 char *path2 = text + SIZEOF_TREE_ATTR;
2549 int cmp = tree_compare_entry(line->type, path1, type, path2);
2551 if (cmp <= 0)
2552 continue;
2554 text = strdup(text);
2555 if (!text)
2556 return FALSE;
2558 if (view->lines > pos)
2559 memmove(&view->line[pos + 1], &view->line[pos],
2560 (view->lines - pos) * sizeof(*line));
2562 line = &view->line[pos];
2563 line->data = text;
2564 line->type = type;
2565 view->lines++;
2566 return TRUE;
2567 }
2569 if (!pager_read(view, text))
2570 return FALSE;
2572 /* Move the current line to the first tree entry. */
2573 if (first_read)
2574 view->lineno++;
2576 view->line[view->lines - 1].type = type;
2577 return TRUE;
2578 }
2580 static bool
2581 tree_enter(struct view *view, struct line *line)
2582 {
2583 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2584 enum request request;
2586 switch (line->type) {
2587 case LINE_TREE_DIR:
2588 /* Depending on whether it is a subdir or parent (updir?) link
2589 * mangle the path buffer. */
2590 if (line == &view->line[1] && *opt_path) {
2591 size_t path_len = strlen(opt_path);
2592 char *dirsep = opt_path + path_len - 1;
2594 while (dirsep > opt_path && dirsep[-1] != '/')
2595 dirsep--;
2597 dirsep[0] = 0;
2599 } else {
2600 size_t pathlen = strlen(opt_path);
2601 size_t origlen = pathlen;
2602 char *data = line->data;
2603 char *basename = data + SIZEOF_TREE_ATTR;
2605 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2606 opt_path[origlen] = 0;
2607 return TRUE;
2608 }
2609 }
2611 /* Trees and subtrees share the same ID, so they are not not
2612 * unique like blobs. */
2613 flags |= OPEN_RELOAD;
2614 request = REQ_VIEW_TREE;
2615 break;
2617 case LINE_TREE_FILE:
2618 request = REQ_VIEW_BLOB;
2619 break;
2621 default:
2622 return TRUE;
2623 }
2625 open_view(view, request, flags);
2627 return TRUE;
2628 }
2630 static void
2631 tree_select(struct view *view, struct line *line)
2632 {
2633 char *text = line->data;
2635 text += STRING_SIZE("100644 blob ");
2637 if (line->type == LINE_TREE_FILE) {
2638 string_ncopy(ref_blob, text, 40);
2639 /* Also update the blob view's ref, since all there must always
2640 * be in sync. */
2641 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2643 } else if (line->type != LINE_TREE_DIR) {
2644 return;
2645 }
2647 string_ncopy(view->ref, text, 40);
2648 }
2650 static struct view_ops tree_ops = {
2651 "file",
2652 pager_draw,
2653 tree_read,
2654 tree_enter,
2655 pager_grep,
2656 tree_select,
2657 };
2659 static bool
2660 blob_read(struct view *view, char *line)
2661 {
2662 bool state = pager_read(view, line);
2664 if (state == TRUE)
2665 view->line[view->lines - 1].type = LINE_DEFAULT;
2667 return state;
2668 }
2670 static struct view_ops blob_ops = {
2671 "line",
2672 pager_draw,
2673 blob_read,
2674 pager_enter,
2675 pager_grep,
2676 pager_select,
2677 };
2680 /*
2681 * Main view backend
2682 */
2684 struct commit {
2685 char id[SIZEOF_REV]; /* SHA1 ID. */
2686 char title[128]; /* First line of the commit message. */
2687 char author[75]; /* Author of the commit. */
2688 struct tm time; /* Date from the author ident. */
2689 struct ref **refs; /* Repository references. */
2690 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2691 size_t graph_size; /* The width of the graph array. */
2692 };
2694 static bool
2695 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2696 {
2697 char buf[DATE_COLS + 1];
2698 struct commit *commit = line->data;
2699 enum line_type type;
2700 int col = 0;
2701 size_t timelen;
2702 size_t authorlen;
2703 int trimmed = 1;
2705 if (!*commit->author)
2706 return FALSE;
2708 wmove(view->win, lineno, col);
2710 if (selected) {
2711 type = LINE_CURSOR;
2712 wattrset(view->win, get_line_attr(type));
2713 wchgat(view->win, -1, 0, type, NULL);
2715 } else {
2716 type = LINE_MAIN_COMMIT;
2717 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2718 }
2720 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2721 waddnstr(view->win, buf, timelen);
2722 waddstr(view->win, " ");
2724 col += DATE_COLS;
2725 wmove(view->win, lineno, col);
2726 if (type != LINE_CURSOR)
2727 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2729 if (opt_utf8) {
2730 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2731 } else {
2732 authorlen = strlen(commit->author);
2733 if (authorlen > AUTHOR_COLS - 2) {
2734 authorlen = AUTHOR_COLS - 2;
2735 trimmed = 1;
2736 }
2737 }
2739 if (trimmed) {
2740 waddnstr(view->win, commit->author, authorlen);
2741 if (type != LINE_CURSOR)
2742 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2743 waddch(view->win, '~');
2744 } else {
2745 waddstr(view->win, commit->author);
2746 }
2748 col += AUTHOR_COLS;
2749 if (type != LINE_CURSOR)
2750 wattrset(view->win, A_NORMAL);
2752 if (opt_rev_graph && commit->graph_size) {
2753 size_t i;
2755 wmove(view->win, lineno, col);
2756 /* Using waddch() instead of waddnstr() ensures that
2757 * they'll be rendered correctly for the cursor line. */
2758 for (i = 0; i < commit->graph_size; i++)
2759 waddch(view->win, commit->graph[i]);
2761 col += commit->graph_size + 1;
2762 }
2764 wmove(view->win, lineno, col);
2766 if (commit->refs) {
2767 size_t i = 0;
2769 do {
2770 if (type == LINE_CURSOR)
2771 ;
2772 else if (commit->refs[i]->tag)
2773 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2774 else
2775 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2776 waddstr(view->win, "[");
2777 waddstr(view->win, commit->refs[i]->name);
2778 waddstr(view->win, "]");
2779 if (type != LINE_CURSOR)
2780 wattrset(view->win, A_NORMAL);
2781 waddstr(view->win, " ");
2782 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2783 } while (commit->refs[i++]->next);
2784 }
2786 if (type != LINE_CURSOR)
2787 wattrset(view->win, get_line_attr(type));
2789 {
2790 int titlelen = strlen(commit->title);
2792 if (col + titlelen > view->width)
2793 titlelen = view->width - col;
2795 waddnstr(view->win, commit->title, titlelen);
2796 }
2798 return TRUE;
2799 }
2801 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2802 static bool
2803 main_read(struct view *view, char *line)
2804 {
2805 enum line_type type = get_line_type(line);
2806 struct commit *commit = view->lines
2807 ? view->line[view->lines - 1].data : NULL;
2809 switch (type) {
2810 case LINE_COMMIT:
2811 commit = calloc(1, sizeof(struct commit));
2812 if (!commit)
2813 return FALSE;
2815 line += STRING_SIZE("commit ");
2817 view->line[view->lines++].data = commit;
2818 string_copy(commit->id, line);
2819 commit->refs = get_refs(commit->id);
2820 commit->graph[commit->graph_size++] = ACS_LTEE;
2821 break;
2823 case LINE_AUTHOR:
2824 {
2825 char *ident = line + STRING_SIZE("author ");
2826 char *end = strchr(ident, '<');
2828 if (!commit)
2829 break;
2831 if (end) {
2832 char *email = end + 1;
2834 for (; end > ident && isspace(end[-1]); end--) ;
2836 if (end == ident && *email) {
2837 ident = email;
2838 end = strchr(ident, '>');
2839 for (; end > ident && isspace(end[-1]); end--) ;
2840 }
2841 *end = 0;
2842 }
2844 /* End is NULL or ident meaning there's no author. */
2845 if (end <= ident)
2846 ident = "Unknown";
2848 string_copy(commit->author, ident);
2850 /* Parse epoch and timezone */
2851 if (end) {
2852 char *secs = strchr(end + 1, '>');
2853 char *zone;
2854 time_t time;
2856 if (!secs || secs[1] != ' ')
2857 break;
2859 secs += 2;
2860 time = (time_t) atol(secs);
2861 zone = strchr(secs, ' ');
2862 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2863 long tz;
2865 zone++;
2866 tz = ('0' - zone[1]) * 60 * 60 * 10;
2867 tz += ('0' - zone[2]) * 60 * 60;
2868 tz += ('0' - zone[3]) * 60;
2869 tz += ('0' - zone[4]) * 60;
2871 if (zone[0] == '-')
2872 tz = -tz;
2874 time -= tz;
2875 }
2876 gmtime_r(&time, &commit->time);
2877 }
2878 break;
2879 }
2880 default:
2881 if (!commit)
2882 break;
2884 /* Fill in the commit title if it has not already been set. */
2885 if (commit->title[0])
2886 break;
2888 /* Require titles to start with a non-space character at the
2889 * offset used by git log. */
2890 if (strncmp(line, " ", 4))
2891 break;
2892 line += 4;
2893 /* Well, if the title starts with a whitespace character,
2894 * try to be forgiving. Otherwise we end up with no title. */
2895 while (isspace(*line))
2896 line++;
2897 if (*line == '\0')
2898 break;
2899 /* FIXME: More graceful handling of titles; append "..." to
2900 * shortened titles, etc. */
2902 string_copy(commit->title, line);
2903 }
2905 return TRUE;
2906 }
2908 static bool
2909 main_enter(struct view *view, struct line *line)
2910 {
2911 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2913 open_view(view, REQ_VIEW_DIFF, flags);
2914 return TRUE;
2915 }
2917 static bool
2918 main_grep(struct view *view, struct line *line)
2919 {
2920 struct commit *commit = line->data;
2921 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2922 char buf[DATE_COLS + 1];
2923 regmatch_t pmatch;
2925 for (state = S_TITLE; state < S_END; state++) {
2926 char *text;
2928 switch (state) {
2929 case S_TITLE: text = commit->title; break;
2930 case S_AUTHOR: text = commit->author; break;
2931 case S_DATE:
2932 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2933 continue;
2934 text = buf;
2935 break;
2937 default:
2938 return FALSE;
2939 }
2941 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
2942 return TRUE;
2943 }
2945 return FALSE;
2946 }
2948 static void
2949 main_select(struct view *view, struct line *line)
2950 {
2951 struct commit *commit = line->data;
2953 string_copy(view->ref, commit->id);
2954 string_copy(ref_commit, view->ref);
2955 }
2957 static struct view_ops main_ops = {
2958 "commit",
2959 main_draw,
2960 main_read,
2961 main_enter,
2962 main_grep,
2963 main_select,
2964 };
2967 /*
2968 * Unicode / UTF-8 handling
2969 *
2970 * NOTE: Much of the following code for dealing with unicode is derived from
2971 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2972 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2973 */
2975 /* I've (over)annotated a lot of code snippets because I am not entirely
2976 * confident that the approach taken by this small UTF-8 interface is correct.
2977 * --jonas */
2979 static inline int
2980 unicode_width(unsigned long c)
2981 {
2982 if (c >= 0x1100 &&
2983 (c <= 0x115f /* Hangul Jamo */
2984 || c == 0x2329
2985 || c == 0x232a
2986 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2987 /* CJK ... Yi */
2988 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2989 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2990 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2991 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2992 || (c >= 0xffe0 && c <= 0xffe6)
2993 || (c >= 0x20000 && c <= 0x2fffd)
2994 || (c >= 0x30000 && c <= 0x3fffd)))
2995 return 2;
2997 return 1;
2998 }
3000 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3001 * Illegal bytes are set one. */
3002 static const unsigned char utf8_bytes[256] = {
3003 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
3004 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
3005 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
3006 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
3007 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,
3008 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,
3009 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,
3010 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,
3011 };
3013 /* Decode UTF-8 multi-byte representation into a unicode character. */
3014 static inline unsigned long
3015 utf8_to_unicode(const char *string, size_t length)
3016 {
3017 unsigned long unicode;
3019 switch (length) {
3020 case 1:
3021 unicode = string[0];
3022 break;
3023 case 2:
3024 unicode = (string[0] & 0x1f) << 6;
3025 unicode += (string[1] & 0x3f);
3026 break;
3027 case 3:
3028 unicode = (string[0] & 0x0f) << 12;
3029 unicode += ((string[1] & 0x3f) << 6);
3030 unicode += (string[2] & 0x3f);
3031 break;
3032 case 4:
3033 unicode = (string[0] & 0x0f) << 18;
3034 unicode += ((string[1] & 0x3f) << 12);
3035 unicode += ((string[2] & 0x3f) << 6);
3036 unicode += (string[3] & 0x3f);
3037 break;
3038 case 5:
3039 unicode = (string[0] & 0x0f) << 24;
3040 unicode += ((string[1] & 0x3f) << 18);
3041 unicode += ((string[2] & 0x3f) << 12);
3042 unicode += ((string[3] & 0x3f) << 6);
3043 unicode += (string[4] & 0x3f);
3044 break;
3045 case 6:
3046 unicode = (string[0] & 0x01) << 30;
3047 unicode += ((string[1] & 0x3f) << 24);
3048 unicode += ((string[2] & 0x3f) << 18);
3049 unicode += ((string[3] & 0x3f) << 12);
3050 unicode += ((string[4] & 0x3f) << 6);
3051 unicode += (string[5] & 0x3f);
3052 break;
3053 default:
3054 die("Invalid unicode length");
3055 }
3057 /* Invalid characters could return the special 0xfffd value but NUL
3058 * should be just as good. */
3059 return unicode > 0xffff ? 0 : unicode;
3060 }
3062 /* Calculates how much of string can be shown within the given maximum width
3063 * and sets trimmed parameter to non-zero value if all of string could not be
3064 * shown.
3065 *
3066 * Additionally, adds to coloffset how many many columns to move to align with
3067 * the expected position. Takes into account how multi-byte and double-width
3068 * characters will effect the cursor position.
3069 *
3070 * Returns the number of bytes to output from string to satisfy max_width. */
3071 static size_t
3072 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3073 {
3074 const char *start = string;
3075 const char *end = strchr(string, '\0');
3076 size_t mbwidth = 0;
3077 size_t width = 0;
3079 *trimmed = 0;
3081 while (string < end) {
3082 int c = *(unsigned char *) string;
3083 unsigned char bytes = utf8_bytes[c];
3084 size_t ucwidth;
3085 unsigned long unicode;
3087 if (string + bytes > end)
3088 break;
3090 /* Change representation to figure out whether
3091 * it is a single- or double-width character. */
3093 unicode = utf8_to_unicode(string, bytes);
3094 /* FIXME: Graceful handling of invalid unicode character. */
3095 if (!unicode)
3096 break;
3098 ucwidth = unicode_width(unicode);
3099 width += ucwidth;
3100 if (width > max_width) {
3101 *trimmed = 1;
3102 break;
3103 }
3105 /* The column offset collects the differences between the
3106 * number of bytes encoding a character and the number of
3107 * columns will be used for rendering said character.
3108 *
3109 * So if some character A is encoded in 2 bytes, but will be
3110 * represented on the screen using only 1 byte this will and up
3111 * adding 1 to the multi-byte column offset.
3112 *
3113 * Assumes that no double-width character can be encoding in
3114 * less than two bytes. */
3115 if (bytes > ucwidth)
3116 mbwidth += bytes - ucwidth;
3118 string += bytes;
3119 }
3121 *coloffset += mbwidth;
3123 return string - start;
3124 }
3127 /*
3128 * Status management
3129 */
3131 /* Whether or not the curses interface has been initialized. */
3132 static bool cursed = FALSE;
3134 /* The status window is used for polling keystrokes. */
3135 static WINDOW *status_win;
3137 static bool status_empty = TRUE;
3139 /* Update status and title window. */
3140 static void
3141 report(const char *msg, ...)
3142 {
3143 struct view *view = display[current_view];
3145 if (input_mode)
3146 return;
3148 if (!status_empty || *msg) {
3149 va_list args;
3151 va_start(args, msg);
3153 wmove(status_win, 0, 0);
3154 if (*msg) {
3155 vwprintw(status_win, msg, args);
3156 status_empty = FALSE;
3157 } else {
3158 status_empty = TRUE;
3159 }
3160 wclrtoeol(status_win);
3161 wrefresh(status_win);
3163 va_end(args);
3164 }
3166 update_view_title(view);
3167 update_display_cursor(view);
3168 }
3170 /* Controls when nodelay should be in effect when polling user input. */
3171 static void
3172 set_nonblocking_input(bool loading)
3173 {
3174 static unsigned int loading_views;
3176 if ((loading == FALSE && loading_views-- == 1) ||
3177 (loading == TRUE && loading_views++ == 0))
3178 nodelay(status_win, loading);
3179 }
3181 static void
3182 init_display(void)
3183 {
3184 int x, y;
3186 /* Initialize the curses library */
3187 if (isatty(STDIN_FILENO)) {
3188 cursed = !!initscr();
3189 } else {
3190 /* Leave stdin and stdout alone when acting as a pager. */
3191 FILE *io = fopen("/dev/tty", "r+");
3193 if (!io)
3194 die("Failed to open /dev/tty");
3195 cursed = !!newterm(NULL, io, io);
3196 }
3198 if (!cursed)
3199 die("Failed to initialize curses");
3201 nonl(); /* Tell curses not to do NL->CR/NL on output */
3202 cbreak(); /* Take input chars one at a time, no wait for \n */
3203 noecho(); /* Don't echo input */
3204 leaveok(stdscr, TRUE);
3206 if (has_colors())
3207 init_colors();
3209 getmaxyx(stdscr, y, x);
3210 status_win = newwin(1, 0, y - 1, 0);
3211 if (!status_win)
3212 die("Failed to create status window");
3214 /* Enable keyboard mapping */
3215 keypad(status_win, TRUE);
3216 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3217 }
3219 static char *
3220 read_prompt(const char *prompt)
3221 {
3222 enum { READING, STOP, CANCEL } status = READING;
3223 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3224 int pos = 0;
3226 while (status == READING) {
3227 struct view *view;
3228 int i, key;
3230 input_mode = TRUE;
3232 foreach_view (view, i)
3233 update_view(view);
3235 input_mode = FALSE;
3237 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
3238 wclrtoeol(status_win);
3240 /* Refresh, accept single keystroke of input */
3241 key = wgetch(status_win);
3242 switch (key) {
3243 case KEY_RETURN:
3244 case KEY_ENTER:
3245 case '\n':
3246 status = pos ? STOP : CANCEL;
3247 break;
3249 case KEY_BACKSPACE:
3250 if (pos > 0)
3251 pos--;
3252 else
3253 status = CANCEL;
3254 break;
3256 case KEY_ESC:
3257 status = CANCEL;
3258 break;
3260 case ERR:
3261 break;
3263 default:
3264 if (pos >= sizeof(buf)) {
3265 report("Input string too long");
3266 return NULL;
3267 }
3269 if (isprint(key))
3270 buf[pos++] = (char) key;
3271 }
3272 }
3274 /* Clear the status window */
3275 status_empty = FALSE;
3276 report("");
3278 if (status == CANCEL)
3279 return NULL;
3281 buf[pos++] = 0;
3283 return buf;
3284 }
3286 /*
3287 * Repository references
3288 */
3290 static struct ref *refs;
3291 static size_t refs_size;
3293 /* Id <-> ref store */
3294 static struct ref ***id_refs;
3295 static size_t id_refs_size;
3297 static struct ref **
3298 get_refs(char *id)
3299 {
3300 struct ref ***tmp_id_refs;
3301 struct ref **ref_list = NULL;
3302 size_t ref_list_size = 0;
3303 size_t i;
3305 for (i = 0; i < id_refs_size; i++)
3306 if (!strcmp(id, id_refs[i][0]->id))
3307 return id_refs[i];
3309 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3310 if (!tmp_id_refs)
3311 return NULL;
3313 id_refs = tmp_id_refs;
3315 for (i = 0; i < refs_size; i++) {
3316 struct ref **tmp;
3318 if (strcmp(id, refs[i].id))
3319 continue;
3321 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3322 if (!tmp) {
3323 if (ref_list)
3324 free(ref_list);
3325 return NULL;
3326 }
3328 ref_list = tmp;
3329 if (ref_list_size > 0)
3330 ref_list[ref_list_size - 1]->next = 1;
3331 ref_list[ref_list_size] = &refs[i];
3333 /* XXX: The properties of the commit chains ensures that we can
3334 * safely modify the shared ref. The repo references will
3335 * always be similar for the same id. */
3336 ref_list[ref_list_size]->next = 0;
3337 ref_list_size++;
3338 }
3340 if (ref_list)
3341 id_refs[id_refs_size++] = ref_list;
3343 return ref_list;
3344 }
3346 static int
3347 read_ref(char *id, int idlen, char *name, int namelen)
3348 {
3349 struct ref *ref;
3350 bool tag = FALSE;
3352 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3353 /* Commits referenced by tags has "^{}" appended. */
3354 if (name[namelen - 1] != '}')
3355 return OK;
3357 while (namelen > 0 && name[namelen] != '^')
3358 namelen--;
3360 tag = TRUE;
3361 namelen -= STRING_SIZE("refs/tags/");
3362 name += STRING_SIZE("refs/tags/");
3364 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3365 namelen -= STRING_SIZE("refs/heads/");
3366 name += STRING_SIZE("refs/heads/");
3368 } else if (!strcmp(name, "HEAD")) {
3369 return OK;
3370 }
3372 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3373 if (!refs)
3374 return ERR;
3376 ref = &refs[refs_size++];
3377 ref->name = malloc(namelen + 1);
3378 if (!ref->name)
3379 return ERR;
3381 strncpy(ref->name, name, namelen);
3382 ref->name[namelen] = 0;
3383 ref->tag = tag;
3384 string_copy(ref->id, id);
3386 return OK;
3387 }
3389 static int
3390 load_refs(void)
3391 {
3392 const char *cmd_env = getenv("TIG_LS_REMOTE");
3393 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3395 return read_properties(popen(cmd, "r"), "\t", read_ref);
3396 }
3398 static int
3399 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3400 {
3401 if (!strcmp(name, "i18n.commitencoding"))
3402 string_copy(opt_encoding, value);
3404 return OK;
3405 }
3407 static int
3408 load_repo_config(void)
3409 {
3410 return read_properties(popen("git repo-config --list", "r"),
3411 "=", read_repo_config_option);
3412 }
3414 static int
3415 read_properties(FILE *pipe, const char *separators,
3416 int (*read_property)(char *, int, char *, int))
3417 {
3418 char buffer[BUFSIZ];
3419 char *name;
3420 int state = OK;
3422 if (!pipe)
3423 return ERR;
3425 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3426 char *value;
3427 size_t namelen;
3428 size_t valuelen;
3430 name = chomp_string(name);
3431 namelen = strcspn(name, separators);
3433 if (name[namelen]) {
3434 name[namelen] = 0;
3435 value = chomp_string(name + namelen + 1);
3436 valuelen = strlen(value);
3438 } else {
3439 value = "";
3440 valuelen = 0;
3441 }
3443 state = read_property(name, namelen, value, valuelen);
3444 }
3446 if (state != ERR && ferror(pipe))
3447 state = ERR;
3449 pclose(pipe);
3451 return state;
3452 }
3455 /*
3456 * Main
3457 */
3459 static void __NORETURN
3460 quit(int sig)
3461 {
3462 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3463 if (cursed)
3464 endwin();
3465 exit(0);
3466 }
3468 static void __NORETURN
3469 die(const char *err, ...)
3470 {
3471 va_list args;
3473 endwin();
3475 va_start(args, err);
3476 fputs("tig: ", stderr);
3477 vfprintf(stderr, err, args);
3478 fputs("\n", stderr);
3479 va_end(args);
3481 exit(1);
3482 }
3484 int
3485 main(int argc, char *argv[])
3486 {
3487 struct view *view;
3488 enum request request;
3489 size_t i;
3491 signal(SIGINT, quit);
3493 if (setlocale(LC_ALL, "")) {
3494 string_copy(opt_codeset, nl_langinfo(CODESET));
3495 }
3497 if (load_options() == ERR)
3498 die("Failed to load user config.");
3500 /* Load the repo config file so options can be overwritten from
3501 * the command line. */
3502 if (load_repo_config() == ERR)
3503 die("Failed to load repo config.");
3505 if (!parse_options(argc, argv))
3506 return 0;
3508 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3509 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3510 if (opt_iconv == ICONV_NONE)
3511 die("Failed to initialize character set conversion");
3512 }
3514 if (load_refs() == ERR)
3515 die("Failed to load refs.");
3517 /* Require a git repository unless when running in pager mode. */
3518 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3519 die("Not a git repository");
3521 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3522 view->cmd_env = getenv(view->cmd_env);
3524 request = opt_request;
3526 init_display();
3528 while (view_driver(display[current_view], request)) {
3529 int key;
3530 int i;
3532 foreach_view (view, i)
3533 update_view(view);
3535 /* Refresh, accept single keystroke of input */
3536 key = wgetch(status_win);
3538 /* wgetch() with nodelay() enabled returns ERR when there's no
3539 * input. */
3540 if (key == ERR) {
3541 request = REQ_NONE;
3542 continue;
3543 }
3545 request = get_keybinding(display[current_view]->keymap, key);
3547 /* Some low-level request handling. This keeps access to
3548 * status_win restricted. */
3549 switch (request) {
3550 case REQ_PROMPT:
3551 {
3552 char *cmd = read_prompt(":");
3554 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3555 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3556 opt_request = REQ_VIEW_DIFF;
3557 } else {
3558 opt_request = REQ_VIEW_PAGER;
3559 }
3560 break;
3561 }
3563 request = REQ_NONE;
3564 break;
3565 }
3566 case REQ_SEARCH:
3567 case REQ_SEARCH_BACK:
3568 {
3569 const char *prompt = request == REQ_SEARCH
3570 ? "/" : "?";
3571 char *search = read_prompt(prompt);
3573 if (search)
3574 string_copy(opt_search, search);
3575 else
3576 request = REQ_NONE;
3577 break;
3578 }
3579 case REQ_SCREEN_RESIZE:
3580 {
3581 int height, width;
3583 getmaxyx(stdscr, height, width);
3585 /* Resize the status view and let the view driver take
3586 * care of resizing the displayed views. */
3587 wresize(status_win, 1, width);
3588 mvwin(status_win, height - 1, 0);
3589 wrefresh(status_win);
3590 break;
3591 }
3592 default:
3593 break;
3594 }
3595 }
3597 quit(0);
3599 return 0;
3600 }