1 /* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
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.
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.
15 #define VERSION "tig-0.5.git"
33 #include <sys/types.h>
43 #define __NORETURN __attribute__((__noreturn__))
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
81 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
83 #define TIG_LS_REMOTE \
84 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
86 #define TIG_DIFF_CMD \
87 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
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 \
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. */
107 #define KEY_RETURN '\r'
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 remote:1; /* Is it a remote ref? */
116 unsigned int next:1; /* For ref lists: are there more refs? */
119 static struct ref **get_refs(char *id);
128 set_from_int_map(struct int_map *map, size_t map_size,
129 int *value, const char *name, int namelen)
134 for (i = 0; i < map_size; i++)
135 if (namelen == map[i].namelen &&
136 !strncasecmp(name, map[i].name, namelen)) {
137 *value = map[i].value;
150 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
152 if (srclen > dstlen - 1)
155 strncpy(dst, src, srclen);
159 /* Shorthands for safely copying into a fixed buffer. */
161 #define string_copy(dst, src) \
162 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
164 #define string_ncopy(dst, src, srclen) \
165 string_ncopy_do(dst, sizeof(dst), src, srclen)
168 chomp_string(char *name)
172 while (isspace(*name))
175 namelen = strlen(name) - 1;
176 while (namelen > 0 && isspace(name[namelen]))
183 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
186 size_t pos = bufpos ? *bufpos : 0;
189 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
195 return pos >= bufsize ? FALSE : TRUE;
198 #define string_format(buf, fmt, args...) \
199 string_nformat(buf, sizeof(buf), NULL, fmt, args)
201 #define string_format_from(buf, from, fmt, args...) \
202 string_nformat(buf, sizeof(buf), from, fmt, args)
205 string_enum_compare(const char *str1, const char *str2, int len)
209 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
211 /* Diff-Header == DIFF_HEADER */
212 for (i = 0; i < len; i++) {
213 if (toupper(str1[i]) == toupper(str2[i]))
216 if (string_enum_sep(str1[i]) &&
217 string_enum_sep(str2[i]))
220 return str1[i] - str2[i];
228 * NOTE: The following is a slightly modified copy of the git project's shell
229 * quoting routines found in the quote.c file.
231 * Help to copy the thing properly quoted for the shell safety. any single
232 * quote is replaced with '\'', any exclamation point is replaced with '\!',
233 * and the whole thing is enclosed in a
236 * original sq_quote result
237 * name ==> name ==> 'name'
238 * a b ==> a b ==> 'a b'
239 * a'b ==> a'\''b ==> 'a'\''b'
240 * a!b ==> a'\!'b ==> 'a'\!'b'
244 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
248 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
251 while ((c = *src++)) {
252 if (c == '\'' || c == '!') {
272 /* XXX: Keep the view request first and in sync with views[]. */ \
273 REQ_GROUP("View switching") \
274 REQ_(VIEW_MAIN, "Show main view"), \
275 REQ_(VIEW_DIFF, "Show diff view"), \
276 REQ_(VIEW_LOG, "Show log view"), \
277 REQ_(VIEW_TREE, "Show tree view"), \
278 REQ_(VIEW_BLOB, "Show blob view"), \
279 REQ_(VIEW_HELP, "Show help page"), \
280 REQ_(VIEW_PAGER, "Show pager view"), \
282 REQ_GROUP("View manipulation") \
283 REQ_(ENTER, "Enter current line and scroll"), \
284 REQ_(NEXT, "Move to next"), \
285 REQ_(PREVIOUS, "Move to previous"), \
286 REQ_(VIEW_NEXT, "Move focus to next view"), \
287 REQ_(VIEW_CLOSE, "Close the current view"), \
288 REQ_(QUIT, "Close all views and quit"), \
290 REQ_GROUP("Cursor navigation") \
291 REQ_(MOVE_UP, "Move cursor one line up"), \
292 REQ_(MOVE_DOWN, "Move cursor one line down"), \
293 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
294 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
295 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
296 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
298 REQ_GROUP("Scrolling") \
299 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
300 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
301 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
302 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
304 REQ_GROUP("Searching") \
305 REQ_(SEARCH, "Search the view"), \
306 REQ_(SEARCH_BACK, "Search backwards in the view"), \
307 REQ_(FIND_NEXT, "Find next search match"), \
308 REQ_(FIND_PREV, "Find previous search match"), \
311 REQ_(NONE, "Do nothing"), \
312 REQ_(PROMPT, "Bring up the prompt"), \
313 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
314 REQ_(SCREEN_RESIZE, "Resize the screen"), \
315 REQ_(SHOW_VERSION, "Show version information"), \
316 REQ_(STOP_LOADING, "Stop all loading views"), \
317 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
318 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
321 /* User action requests. */
323 #define REQ_GROUP(help)
324 #define REQ_(req, help) REQ_##req
326 /* Offset all requests to avoid conflicts with ncurses getch values. */
327 REQ_OFFSET = KEY_MAX + 1,
335 struct request_info {
336 enum request request;
342 static struct request_info req_info[] = {
343 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
344 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
351 get_request(const char *name)
353 int namelen = strlen(name);
356 for (i = 0; i < ARRAY_SIZE(req_info); i++)
357 if (req_info[i].namelen == namelen &&
358 !string_enum_compare(req_info[i].name, name, namelen))
359 return req_info[i].request;
369 static const char usage[] =
370 VERSION " (" __DATE__ ")\n"
372 "Usage: tig [options]\n"
373 " or: tig [options] [--] [git log options]\n"
374 " or: tig [options] log [git log options]\n"
375 " or: tig [options] diff [git diff options]\n"
376 " or: tig [options] show [git show options]\n"
377 " or: tig [options] < [git command output]\n"
380 " -l Start up in log view\n"
381 " -d Start up in diff view\n"
382 " -n[I], --line-number[=I] Show line numbers with given interval\n"
383 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
384 " -- Mark end of tig options\n"
385 " -v, --version Show version and exit\n"
386 " -h, --help Show help message and exit\n";
388 /* Option and state variables. */
389 static bool opt_line_number = FALSE;
390 static bool opt_rev_graph = TRUE;
391 static int opt_num_interval = NUMBER_INTERVAL;
392 static int opt_tab_size = TABSIZE;
393 static enum request opt_request = REQ_VIEW_MAIN;
394 static char opt_cmd[SIZEOF_STR] = "";
395 static char opt_path[SIZEOF_STR] = "";
396 static FILE *opt_pipe = NULL;
397 static char opt_encoding[20] = "UTF-8";
398 static bool opt_utf8 = TRUE;
399 static char opt_codeset[20] = "UTF-8";
400 static iconv_t opt_iconv = ICONV_NONE;
401 static char opt_search[SIZEOF_STR] = "";
409 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
419 int namelen = strlen(name);
423 if (strncmp(opt, name, namelen))
426 if (opt[namelen] == '=')
427 value = opt + namelen + 1;
430 if (!short_name || opt[1] != short_name)
435 va_start(args, type);
436 if (type == OPT_INT) {
437 number = va_arg(args, int *);
439 *number = atoi(value);
446 /* Returns the index of log or diff command or -1 to exit. */
448 parse_options(int argc, char *argv[])
452 for (i = 1; i < argc; i++) {
455 if (!strcmp(opt, "log") ||
456 !strcmp(opt, "diff") ||
457 !strcmp(opt, "show")) {
458 opt_request = opt[0] == 'l'
459 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
463 if (opt[0] && opt[0] != '-')
466 if (!strcmp(opt, "-l")) {
467 opt_request = REQ_VIEW_LOG;
471 if (!strcmp(opt, "-d")) {
472 opt_request = REQ_VIEW_DIFF;
476 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
477 opt_line_number = TRUE;
481 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
482 opt_tab_size = MIN(opt_tab_size, TABSIZE);
486 if (check_option(opt, 'v', "version", OPT_NONE)) {
487 printf("tig version %s\n", VERSION);
491 if (check_option(opt, 'h', "help", OPT_NONE)) {
496 if (!strcmp(opt, "--")) {
501 die("unknown option '%s'\n\n%s", opt, usage);
504 if (!isatty(STDIN_FILENO)) {
505 opt_request = REQ_VIEW_PAGER;
508 } else if (i < argc) {
511 if (opt_request == REQ_VIEW_MAIN)
512 /* XXX: This is vulnerable to the user overriding
513 * options required for the main view parser. */
514 string_copy(opt_cmd, "git log --pretty=raw");
516 string_copy(opt_cmd, "git");
517 buf_size = strlen(opt_cmd);
519 while (buf_size < sizeof(opt_cmd) && i < argc) {
520 opt_cmd[buf_size++] = ' ';
521 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
524 if (buf_size >= sizeof(opt_cmd))
525 die("command too long");
527 opt_cmd[buf_size] = 0;
530 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
538 * Line-oriented content detection.
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_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
581 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
582 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
583 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
586 #define LINE(type, line, fg, bg, attr) \
593 const char *name; /* Option name. */
594 int namelen; /* Size of option name. */
595 const char *line; /* The start of line to match. */
596 int linelen; /* Size of string to match. */
597 int fg, bg, attr; /* Color and text attributes for the lines. */
600 static struct line_info line_info[] = {
601 #define LINE(type, line, fg, bg, attr) \
602 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
607 static enum line_type
608 get_line_type(char *line)
610 int linelen = strlen(line);
613 for (type = 0; type < ARRAY_SIZE(line_info); type++)
614 /* Case insensitive search matches Signed-off-by lines better. */
615 if (linelen >= line_info[type].linelen &&
616 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
623 get_line_attr(enum line_type type)
625 assert(type < ARRAY_SIZE(line_info));
626 return COLOR_PAIR(type) | line_info[type].attr;
629 static struct line_info *
630 get_line_info(char *name, int namelen)
634 for (type = 0; type < ARRAY_SIZE(line_info); type++)
635 if (namelen == line_info[type].namelen &&
636 !string_enum_compare(line_info[type].name, name, namelen))
637 return &line_info[type];
645 int default_bg = COLOR_BLACK;
646 int default_fg = COLOR_WHITE;
651 if (use_default_colors() != ERR) {
656 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
657 struct line_info *info = &line_info[type];
658 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
659 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
661 init_pair(type, fg, bg);
669 unsigned int selected:1;
671 void *data; /* User data */
681 enum request request;
682 struct keybinding *next;
685 static struct keybinding default_keybindings[] = {
687 { 'm', REQ_VIEW_MAIN },
688 { 'd', REQ_VIEW_DIFF },
689 { 'l', REQ_VIEW_LOG },
690 { 't', REQ_VIEW_TREE },
691 { 'f', REQ_VIEW_BLOB },
692 { 'p', REQ_VIEW_PAGER },
693 { 'h', REQ_VIEW_HELP },
695 /* View manipulation */
696 { 'q', REQ_VIEW_CLOSE },
697 { KEY_TAB, REQ_VIEW_NEXT },
698 { KEY_RETURN, REQ_ENTER },
699 { KEY_UP, REQ_PREVIOUS },
700 { KEY_DOWN, REQ_NEXT },
702 /* Cursor navigation */
703 { 'k', REQ_MOVE_UP },
704 { 'j', REQ_MOVE_DOWN },
705 { KEY_HOME, REQ_MOVE_FIRST_LINE },
706 { KEY_END, REQ_MOVE_LAST_LINE },
707 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
708 { ' ', REQ_MOVE_PAGE_DOWN },
709 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
710 { 'b', REQ_MOVE_PAGE_UP },
711 { '-', REQ_MOVE_PAGE_UP },
714 { KEY_IC, REQ_SCROLL_LINE_UP },
715 { KEY_DC, REQ_SCROLL_LINE_DOWN },
716 { 'w', REQ_SCROLL_PAGE_UP },
717 { 's', REQ_SCROLL_PAGE_DOWN },
721 { '?', REQ_SEARCH_BACK },
722 { 'n', REQ_FIND_NEXT },
723 { 'N', REQ_FIND_PREV },
727 { 'z', REQ_STOP_LOADING },
728 { 'v', REQ_SHOW_VERSION },
729 { 'r', REQ_SCREEN_REDRAW },
730 { '.', REQ_TOGGLE_LINENO },
731 { 'g', REQ_TOGGLE_REV_GRAPH },
734 /* Using the ncurses SIGWINCH handler. */
735 { KEY_RESIZE, REQ_SCREEN_RESIZE },
738 #define KEYMAP_INFO \
749 #define KEYMAP_(name) KEYMAP_##name
754 static struct int_map keymap_table[] = {
755 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
760 #define set_keymap(map, name) \
761 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
763 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
766 add_keybinding(enum keymap keymap, enum request request, int key)
768 struct keybinding *keybinding;
770 keybinding = calloc(1, sizeof(*keybinding));
772 die("Failed to allocate keybinding");
774 keybinding->alias = key;
775 keybinding->request = request;
776 keybinding->next = keybindings[keymap];
777 keybindings[keymap] = keybinding;
780 /* Looks for a key binding first in the given map, then in the generic map, and
781 * lastly in the default keybindings. */
783 get_keybinding(enum keymap keymap, int key)
785 struct keybinding *kbd;
788 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
789 if (kbd->alias == key)
792 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
793 if (kbd->alias == key)
796 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
797 if (default_keybindings[i].alias == key)
798 return default_keybindings[i].request;
800 return (enum request) key;
809 static struct key key_table[] = {
810 { "Enter", KEY_RETURN },
812 { "Backspace", KEY_BACKSPACE },
814 { "Escape", KEY_ESC },
815 { "Left", KEY_LEFT },
816 { "Right", KEY_RIGHT },
818 { "Down", KEY_DOWN },
819 { "Insert", KEY_IC },
820 { "Delete", KEY_DC },
822 { "Home", KEY_HOME },
824 { "PageUp", KEY_PPAGE },
825 { "PageDown", KEY_NPAGE },
835 { "F10", KEY_F(10) },
836 { "F11", KEY_F(11) },
837 { "F12", KEY_F(12) },
841 get_key_value(const char *name)
845 for (i = 0; i < ARRAY_SIZE(key_table); i++)
846 if (!strcasecmp(key_table[i].name, name))
847 return key_table[i].value;
849 if (strlen(name) == 1 && isprint(*name))
856 get_key(enum request request)
858 static char buf[BUFSIZ];
859 static char key_char[] = "'X'";
866 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
867 struct keybinding *keybinding = &default_keybindings[i];
871 if (keybinding->request != request)
874 for (key = 0; key < ARRAY_SIZE(key_table); key++)
875 if (key_table[key].value == keybinding->alias)
876 seq = key_table[key].name;
879 keybinding->alias < 127 &&
880 isprint(keybinding->alias)) {
881 key_char[1] = (char) keybinding->alias;
888 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
889 return "Too many keybindings!";
898 * User config file handling.
901 static struct int_map color_map[] = {
902 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
914 #define set_color(color, name) \
915 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
917 static struct int_map attr_map[] = {
918 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
928 #define set_attribute(attr, name) \
929 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
931 static int config_lineno;
932 static bool config_errors;
933 static char *config_msg;
935 /* Wants: object fgcolor bgcolor [attr] */
937 option_color_command(int argc, char *argv[])
939 struct line_info *info;
941 if (argc != 3 && argc != 4) {
942 config_msg = "Wrong number of arguments given to color command";
946 info = get_line_info(argv[0], strlen(argv[0]));
948 config_msg = "Unknown color name";
952 if (set_color(&info->fg, argv[1]) == ERR ||
953 set_color(&info->bg, argv[2]) == ERR) {
954 config_msg = "Unknown color";
958 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
959 config_msg = "Unknown attribute";
966 /* Wants: name = value */
968 option_set_command(int argc, char *argv[])
971 config_msg = "Wrong number of arguments given to set command";
975 if (strcmp(argv[1], "=")) {
976 config_msg = "No value assigned";
980 if (!strcmp(argv[0], "show-rev-graph")) {
981 opt_rev_graph = (!strcmp(argv[2], "1") ||
982 !strcmp(argv[2], "true") ||
983 !strcmp(argv[2], "yes"));
987 if (!strcmp(argv[0], "line-number-interval")) {
988 opt_num_interval = atoi(argv[2]);
992 if (!strcmp(argv[0], "tab-size")) {
993 opt_tab_size = atoi(argv[2]);
997 if (!strcmp(argv[0], "commit-encoding")) {
999 int delimiter = *arg;
1002 switch (delimiter) {
1005 for (arg++, i = 0; arg[i]; i++)
1006 if (arg[i] == delimiter) {
1011 string_copy(opt_encoding, arg);
1016 config_msg = "Unknown variable name";
1020 /* Wants: mode request key */
1022 option_bind_command(int argc, char *argv[])
1024 enum request request;
1029 config_msg = "Wrong number of arguments given to bind command";
1033 if (set_keymap(&keymap, argv[0]) == ERR) {
1034 config_msg = "Unknown key map";
1038 key = get_key_value(argv[1]);
1040 config_msg = "Unknown key";
1044 request = get_request(argv[2]);
1045 if (request == REQ_UNKNOWN) {
1046 config_msg = "Unknown request name";
1050 add_keybinding(keymap, request, key);
1056 set_option(char *opt, char *value)
1063 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1064 argv[argc++] = value;
1071 while (isspace(*value))
1075 if (!strcmp(opt, "color"))
1076 return option_color_command(argc, argv);
1078 if (!strcmp(opt, "set"))
1079 return option_set_command(argc, argv);
1081 if (!strcmp(opt, "bind"))
1082 return option_bind_command(argc, argv);
1084 config_msg = "Unknown option command";
1089 read_option(char *opt, int optlen, char *value, int valuelen)
1094 config_msg = "Internal error";
1096 /* Check for comment markers, since read_properties() will
1097 * only ensure opt and value are split at first " \t". */
1098 optlen = strcspn(opt, "#");
1102 if (opt[optlen] != 0) {
1103 config_msg = "No option value";
1107 /* Look for comment endings in the value. */
1108 int len = strcspn(value, "#");
1110 if (len < valuelen) {
1112 value[valuelen] = 0;
1115 status = set_option(opt, value);
1118 if (status == ERR) {
1119 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1120 config_lineno, optlen, opt, config_msg);
1121 config_errors = TRUE;
1124 /* Always keep going if errors are encountered. */
1131 char *home = getenv("HOME");
1132 char buf[SIZEOF_STR];
1136 config_errors = FALSE;
1138 if (!home || !string_format(buf, "%s/.tigrc", home))
1141 /* It's ok that the file doesn't exist. */
1142 file = fopen(buf, "r");
1146 if (read_properties(file, " \t", read_option) == ERR ||
1147 config_errors == TRUE)
1148 fprintf(stderr, "Errors while loading %s.\n", buf);
1161 /* The display array of active views and the index of the current view. */
1162 static struct view *display[2];
1163 static unsigned int current_view;
1165 /* Reading from the prompt? */
1166 static bool input_mode = FALSE;
1168 #define foreach_displayed_view(view, i) \
1169 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1171 #define displayed_views() (display[1] != NULL ? 2 : 1)
1173 /* Current head and commit ID */
1174 static char ref_blob[SIZEOF_REF] = "";
1175 static char ref_commit[SIZEOF_REF] = "HEAD";
1176 static char ref_head[SIZEOF_REF] = "HEAD";
1179 const char *name; /* View name */
1180 const char *cmd_fmt; /* Default command line format */
1181 const char *cmd_env; /* Command line set via environment */
1182 const char *id; /* Points to either of ref_{head,commit,blob} */
1184 struct view_ops *ops; /* View operations */
1186 enum keymap keymap; /* What keymap does this view have */
1188 char cmd[SIZEOF_STR]; /* Command buffer */
1189 char ref[SIZEOF_REF]; /* Hovered commit reference */
1190 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1192 int height, width; /* The width and height of the main window */
1193 WINDOW *win; /* The main window */
1194 WINDOW *title; /* The title window living below the main window */
1197 unsigned long offset; /* Offset of the window top */
1198 unsigned long lineno; /* Current line number */
1201 char grep[SIZEOF_STR]; /* Search string */
1202 regex_t *regex; /* Pre-compiled regex */
1204 /* If non-NULL, points to the view that opened this view. If this view
1205 * is closed tig will switch back to the parent view. */
1206 struct view *parent;
1209 unsigned long lines; /* Total number of lines */
1210 struct line *line; /* Line index */
1211 unsigned long line_size;/* Total number of allocated lines */
1212 unsigned int digits; /* Number of digits in the lines member. */
1220 /* What type of content being displayed. Used in the title bar. */
1222 /* Draw one line; @lineno must be < view->height. */
1223 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1224 /* Read one line; updates view->line. */
1225 bool (*read)(struct view *view, char *data);
1226 /* Depending on view, change display based on current line. */
1227 bool (*enter)(struct view *view, struct line *line);
1228 /* Search for regex in a line. */
1229 bool (*grep)(struct view *view, struct line *line);
1231 void (*select)(struct view *view, struct line *line);
1234 static struct view_ops pager_ops;
1235 static struct view_ops main_ops;
1236 static struct view_ops tree_ops;
1237 static struct view_ops blob_ops;
1239 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1240 { name, cmd, #env, ref, ops, map}
1242 #define VIEW_(id, name, ops, ref) \
1243 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1246 static struct view views[] = {
1247 VIEW_(MAIN, "main", &main_ops, ref_head),
1248 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1249 VIEW_(LOG, "log", &pager_ops, ref_head),
1250 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1251 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1252 VIEW_(HELP, "help", &pager_ops, "static"),
1253 VIEW_(PAGER, "pager", &pager_ops, "static"),
1256 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1258 #define foreach_view(view, i) \
1259 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1261 #define view_is_displayed(view) \
1262 (view == display[0] || view == display[1])
1265 draw_view_line(struct view *view, unsigned int lineno)
1268 bool selected = (view->offset + lineno == view->lineno);
1271 assert(view_is_displayed(view));
1273 if (view->offset + lineno >= view->lines)
1276 line = &view->line[view->offset + lineno];
1279 line->selected = TRUE;
1280 view->ops->select(view, line);
1281 } else if (line->selected) {
1282 line->selected = FALSE;
1283 wmove(view->win, lineno, 0);
1284 wclrtoeol(view->win);
1287 scrollok(view->win, FALSE);
1288 draw_ok = view->ops->draw(view, line, lineno, selected);
1289 scrollok(view->win, TRUE);
1295 redraw_view_from(struct view *view, int lineno)
1297 assert(0 <= lineno && lineno < view->height);
1299 for (; lineno < view->height; lineno++) {
1300 if (!draw_view_line(view, lineno))
1304 redrawwin(view->win);
1306 wnoutrefresh(view->win);
1308 wrefresh(view->win);
1312 redraw_view(struct view *view)
1315 redraw_view_from(view, 0);
1320 update_view_title(struct view *view)
1322 char buf[SIZEOF_STR];
1323 char state[SIZEOF_STR];
1324 size_t bufpos = 0, statelen = 0;
1326 assert(view_is_displayed(view));
1328 if (view->lines || view->pipe) {
1329 unsigned int view_lines = view->offset + view->height;
1330 unsigned int lines = view->lines
1331 ? MIN(view_lines, view->lines) * 100 / view->lines
1334 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1341 time_t secs = time(NULL) - view->start_time;
1343 /* Three git seconds are a long time ... */
1345 string_format_from(state, &statelen, " %lds", secs);
1349 string_format_from(buf, &bufpos, "[%s]", view->name);
1350 if (*view->ref && bufpos < view->width) {
1351 size_t refsize = strlen(view->ref);
1352 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1354 if (minsize < view->width)
1355 refsize = view->width - minsize + 7;
1356 string_format_from(buf, &bufpos, " %.*s", refsize, view->ref);
1359 if (statelen && bufpos < view->width) {
1360 string_format_from(buf, &bufpos, " %s", state);
1363 if (view == display[current_view])
1364 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1366 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1368 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1369 wclrtoeol(view->title);
1370 wmove(view->title, 0, view->width - 1);
1373 wnoutrefresh(view->title);
1375 wrefresh(view->title);
1379 resize_display(void)
1382 struct view *base = display[0];
1383 struct view *view = display[1] ? display[1] : display[0];
1385 /* Setup window dimensions */
1387 getmaxyx(stdscr, base->height, base->width);
1389 /* Make room for the status window. */
1393 /* Horizontal split. */
1394 view->width = base->width;
1395 view->height = SCALE_SPLIT_VIEW(base->height);
1396 base->height -= view->height;
1398 /* Make room for the title bar. */
1402 /* Make room for the title bar. */
1407 foreach_displayed_view (view, i) {
1409 view->win = newwin(view->height, 0, offset, 0);
1411 die("Failed to create %s view", view->name);
1413 scrollok(view->win, TRUE);
1415 view->title = newwin(1, 0, offset + view->height, 0);
1417 die("Failed to create title window");
1420 wresize(view->win, view->height, view->width);
1421 mvwin(view->win, offset, 0);
1422 mvwin(view->title, offset + view->height, 0);
1425 offset += view->height + 1;
1430 redraw_display(void)
1435 foreach_displayed_view (view, i) {
1437 update_view_title(view);
1442 update_display_cursor(struct view *view)
1444 /* Move the cursor to the right-most column of the cursor line.
1446 * XXX: This could turn out to be a bit expensive, but it ensures that
1447 * the cursor does not jump around. */
1449 wmove(view->win, view->lineno - view->offset, view->width - 1);
1450 wrefresh(view->win);
1458 /* Scrolling backend */
1460 do_scroll_view(struct view *view, int lines)
1462 bool redraw_current_line = FALSE;
1464 /* The rendering expects the new offset. */
1465 view->offset += lines;
1467 assert(0 <= view->offset && view->offset < view->lines);
1470 /* Move current line into the view. */
1471 if (view->lineno < view->offset) {
1472 view->lineno = view->offset;
1473 redraw_current_line = TRUE;
1474 } else if (view->lineno >= view->offset + view->height) {
1475 view->lineno = view->offset + view->height - 1;
1476 redraw_current_line = TRUE;
1479 assert(view->offset <= view->lineno && view->lineno < view->lines);
1481 /* Redraw the whole screen if scrolling is pointless. */
1482 if (view->height < ABS(lines)) {
1486 int line = lines > 0 ? view->height - lines : 0;
1487 int end = line + ABS(lines);
1489 wscrl(view->win, lines);
1491 for (; line < end; line++) {
1492 if (!draw_view_line(view, line))
1496 if (redraw_current_line)
1497 draw_view_line(view, view->lineno - view->offset);
1500 redrawwin(view->win);
1501 wrefresh(view->win);
1505 /* Scroll frontend */
1507 scroll_view(struct view *view, enum request request)
1511 assert(view_is_displayed(view));
1514 case REQ_SCROLL_PAGE_DOWN:
1515 lines = view->height;
1516 case REQ_SCROLL_LINE_DOWN:
1517 if (view->offset + lines > view->lines)
1518 lines = view->lines - view->offset;
1520 if (lines == 0 || view->offset + view->height >= view->lines) {
1521 report("Cannot scroll beyond the last line");
1526 case REQ_SCROLL_PAGE_UP:
1527 lines = view->height;
1528 case REQ_SCROLL_LINE_UP:
1529 if (lines > view->offset)
1530 lines = view->offset;
1533 report("Cannot scroll beyond the first line");
1541 die("request %d not handled in switch", request);
1544 do_scroll_view(view, lines);
1549 move_view(struct view *view, enum request request)
1551 int scroll_steps = 0;
1555 case REQ_MOVE_FIRST_LINE:
1556 steps = -view->lineno;
1559 case REQ_MOVE_LAST_LINE:
1560 steps = view->lines - view->lineno - 1;
1563 case REQ_MOVE_PAGE_UP:
1564 steps = view->height > view->lineno
1565 ? -view->lineno : -view->height;
1568 case REQ_MOVE_PAGE_DOWN:
1569 steps = view->lineno + view->height >= view->lines
1570 ? view->lines - view->lineno - 1 : view->height;
1582 die("request %d not handled in switch", request);
1585 if (steps <= 0 && view->lineno == 0) {
1586 report("Cannot move beyond the first line");
1589 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1590 report("Cannot move beyond the last line");
1594 /* Move the current line */
1595 view->lineno += steps;
1596 assert(0 <= view->lineno && view->lineno < view->lines);
1598 /* Check whether the view needs to be scrolled */
1599 if (view->lineno < view->offset ||
1600 view->lineno >= view->offset + view->height) {
1601 scroll_steps = steps;
1602 if (steps < 0 && -steps > view->offset) {
1603 scroll_steps = -view->offset;
1605 } else if (steps > 0) {
1606 if (view->lineno == view->lines - 1 &&
1607 view->lines > view->height) {
1608 scroll_steps = view->lines - view->offset - 1;
1609 if (scroll_steps >= view->height)
1610 scroll_steps -= view->height - 1;
1615 if (!view_is_displayed(view)) {
1616 view->offset += steps;
1617 view->ops->select(view, &view->line[view->lineno]);
1621 /* Repaint the old "current" line if we be scrolling */
1622 if (ABS(steps) < view->height)
1623 draw_view_line(view, view->lineno - steps - view->offset);
1626 do_scroll_view(view, scroll_steps);
1630 /* Draw the current line */
1631 draw_view_line(view, view->lineno - view->offset);
1633 redrawwin(view->win);
1634 wrefresh(view->win);
1643 static void search_view(struct view *view, enum request request);
1646 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1648 assert(view_is_displayed(view));
1650 if (!view->ops->grep(view, line))
1653 if (lineno - view->offset >= view->height) {
1654 view->offset = lineno;
1655 view->lineno = lineno;
1659 unsigned long old_lineno = view->lineno - view->offset;
1661 view->lineno = lineno;
1662 draw_view_line(view, old_lineno);
1664 draw_view_line(view, view->lineno - view->offset);
1665 redrawwin(view->win);
1666 wrefresh(view->win);
1669 report("Line %ld matches '%s'", lineno + 1, view->grep);
1674 find_next(struct view *view, enum request request)
1676 unsigned long lineno = view->lineno;
1681 report("No previous search");
1683 search_view(view, request);
1693 case REQ_SEARCH_BACK:
1702 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1703 lineno += direction;
1705 /* Note, lineno is unsigned long so will wrap around in which case it
1706 * will become bigger than view->lines. */
1707 for (; lineno < view->lines; lineno += direction) {
1708 struct line *line = &view->line[lineno];
1710 if (find_next_line(view, lineno, line))
1714 report("No match found for '%s'", view->grep);
1718 search_view(struct view *view, enum request request)
1723 regfree(view->regex);
1726 view->regex = calloc(1, sizeof(*view->regex));
1731 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1732 if (regex_err != 0) {
1733 char buf[SIZEOF_STR] = "unknown error";
1735 regerror(regex_err, view->regex, buf, sizeof(buf));
1736 report("Search failed: %s", buf);
1740 string_copy(view->grep, opt_search);
1742 find_next(view, request);
1746 * Incremental updating
1750 end_update(struct view *view)
1754 set_nonblocking_input(FALSE);
1755 if (view->pipe == stdin)
1763 begin_update(struct view *view)
1765 const char *id = view->id;
1771 string_copy(view->cmd, opt_cmd);
1773 /* When running random commands, the view ref could have become
1774 * invalid so clear it. */
1777 } else if (view == VIEW(REQ_VIEW_TREE)) {
1778 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1780 if (strcmp(view->vid, view->id))
1783 if (!string_format(view->cmd, format, id, opt_path))
1787 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1789 if (!string_format(view->cmd, format, id, id, id, id, id))
1793 /* Special case for the pager view. */
1795 view->pipe = opt_pipe;
1798 view->pipe = popen(view->cmd, "r");
1804 set_nonblocking_input(TRUE);
1809 string_copy(view->vid, id);
1814 for (i = 0; i < view->lines; i++)
1815 if (view->line[i].data)
1816 free(view->line[i].data);
1822 view->start_time = time(NULL);
1827 static struct line *
1828 realloc_lines(struct view *view, size_t line_size)
1830 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1836 view->line_size = line_size;
1841 update_view(struct view *view)
1843 char in_buffer[BUFSIZ];
1844 char out_buffer[BUFSIZ * 2];
1846 /* The number of lines to read. If too low it will cause too much
1847 * redrawing (and possible flickering), if too high responsiveness
1849 unsigned long lines = view->height;
1850 int redraw_from = -1;
1855 /* Only redraw if lines are visible. */
1856 if (view->offset + view->height >= view->lines)
1857 redraw_from = view->lines - view->offset;
1859 /* FIXME: This is probably not perfect for backgrounded views. */
1860 if (!realloc_lines(view, view->lines + lines))
1863 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1864 size_t linelen = strlen(line);
1867 line[linelen - 1] = 0;
1869 if (opt_iconv != ICONV_NONE) {
1871 size_t inlen = linelen;
1873 char *outbuf = out_buffer;
1874 size_t outlen = sizeof(out_buffer);
1878 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1879 if (ret != (size_t) -1) {
1881 linelen = strlen(out_buffer);
1885 if (!view->ops->read(view, line))
1895 lines = view->lines;
1896 for (digits = 0; lines; digits++)
1899 /* Keep the displayed view in sync with line number scaling. */
1900 if (digits != view->digits) {
1901 view->digits = digits;
1906 if (!view_is_displayed(view))
1909 if (view == VIEW(REQ_VIEW_TREE)) {
1910 /* Clear the view and redraw everything since the tree sorting
1911 * might have rearranged things. */
1914 } else if (redraw_from >= 0) {
1915 /* If this is an incremental update, redraw the previous line
1916 * since for commits some members could have changed when
1917 * loading the main view. */
1918 if (redraw_from > 0)
1921 /* Incrementally draw avoids flickering. */
1922 redraw_view_from(view, redraw_from);
1925 /* Update the title _after_ the redraw so that if the redraw picks up a
1926 * commit reference in view->ref it'll be available here. */
1927 update_view_title(view);
1930 if (ferror(view->pipe)) {
1931 report("Failed to read: %s", strerror(errno));
1934 } else if (feof(view->pipe)) {
1942 report("Allocation failure");
1954 static void open_help_view(struct view *view)
1957 int lines = ARRAY_SIZE(req_info) + 2;
1960 if (view->lines > 0)
1963 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1964 if (!req_info[i].request)
1967 view->line = calloc(lines, sizeof(*view->line));
1969 report("Allocation failure");
1973 view->ops->read(view, "Quick reference for tig keybindings:");
1975 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1978 if (!req_info[i].request) {
1979 view->ops->read(view, "");
1980 view->ops->read(view, req_info[i].help);
1984 key = get_key(req_info[i].request);
1985 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1988 view->ops->read(view, buf);
1993 OPEN_DEFAULT = 0, /* Use default view switching. */
1994 OPEN_SPLIT = 1, /* Split current view. */
1995 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1996 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2000 open_view(struct view *prev, enum request request, enum open_flags flags)
2002 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2003 bool split = !!(flags & OPEN_SPLIT);
2004 bool reload = !!(flags & OPEN_RELOAD);
2005 struct view *view = VIEW(request);
2006 int nviews = displayed_views();
2007 struct view *base_view = display[0];
2009 if (view == prev && nviews == 1 && !reload) {
2010 report("Already in %s view", view->name);
2014 if (view == VIEW(REQ_VIEW_HELP)) {
2015 open_help_view(view);
2017 } else if ((reload || strcmp(view->vid, view->id)) &&
2018 !begin_update(view)) {
2019 report("Failed to load %s view", view->name);
2028 /* Maximize the current view. */
2029 memset(display, 0, sizeof(display));
2031 display[current_view] = view;
2034 /* Resize the view when switching between split- and full-screen,
2035 * or when switching between two different full-screen views. */
2036 if (nviews != displayed_views() ||
2037 (nviews == 1 && base_view != display[0]))
2040 if (split && prev->lineno - prev->offset >= prev->height) {
2041 /* Take the title line into account. */
2042 int lines = prev->lineno - prev->offset - prev->height + 1;
2044 /* Scroll the view that was split if the current line is
2045 * outside the new limited view. */
2046 do_scroll_view(prev, lines);
2049 if (prev && view != prev) {
2050 if (split && !backgrounded) {
2051 /* "Blur" the previous view. */
2052 update_view_title(prev);
2055 view->parent = prev;
2058 if (view->pipe && view->lines == 0) {
2059 /* Clear the old view and let the incremental updating refill
2068 /* If the view is backgrounded the above calls to report()
2069 * won't redraw the view title. */
2071 update_view_title(view);
2076 * User request switch noodle
2080 view_driver(struct view *view, enum request request)
2087 case REQ_MOVE_PAGE_UP:
2088 case REQ_MOVE_PAGE_DOWN:
2089 case REQ_MOVE_FIRST_LINE:
2090 case REQ_MOVE_LAST_LINE:
2091 move_view(view, request);
2094 case REQ_SCROLL_LINE_DOWN:
2095 case REQ_SCROLL_LINE_UP:
2096 case REQ_SCROLL_PAGE_DOWN:
2097 case REQ_SCROLL_PAGE_UP:
2098 scroll_view(view, request);
2103 report("No file chosen, press 't' to open tree view");
2112 case REQ_VIEW_PAGER:
2113 open_view(view, request, OPEN_DEFAULT);
2118 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2120 if ((view == VIEW(REQ_VIEW_DIFF) &&
2121 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2122 (view == VIEW(REQ_VIEW_BLOB) &&
2123 view->parent == VIEW(REQ_VIEW_TREE))) {
2124 view = view->parent;
2125 move_view(view, request);
2126 if (view_is_displayed(view))
2127 update_view_title(view);
2129 move_view(view, request);
2136 report("Nothing to enter");
2139 return view->ops->enter(view, &view->line[view->lineno]);
2143 int nviews = displayed_views();
2144 int next_view = (current_view + 1) % nviews;
2146 if (next_view == current_view) {
2147 report("Only one view is displayed");
2151 current_view = next_view;
2152 /* Blur out the title of the previous view. */
2153 update_view_title(view);
2157 case REQ_TOGGLE_LINENO:
2158 opt_line_number = !opt_line_number;
2162 case REQ_TOGGLE_REV_GRAPH:
2163 opt_rev_graph = !opt_rev_graph;
2168 /* Always reload^Wrerun commands from the prompt. */
2169 open_view(view, opt_request, OPEN_RELOAD);
2173 case REQ_SEARCH_BACK:
2174 search_view(view, request);
2179 find_next(view, request);
2182 case REQ_STOP_LOADING:
2183 for (i = 0; i < ARRAY_SIZE(views); i++) {
2186 report("Stopped loading the %s view", view->name),
2191 case REQ_SHOW_VERSION:
2192 report("%s (built %s)", VERSION, __DATE__);
2195 case REQ_SCREEN_RESIZE:
2198 case REQ_SCREEN_REDRAW:
2206 case REQ_VIEW_CLOSE:
2207 /* XXX: Mark closed views by letting view->parent point to the
2208 * view itself. Parents to closed view should never be
2211 view->parent->parent != view->parent) {
2212 memset(display, 0, sizeof(display));
2214 display[current_view] = view->parent;
2215 view->parent = view;
2225 /* An unknown key will show most commonly used commands. */
2226 report("Unknown key, press 'h' for help");
2239 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2241 char *text = line->data;
2242 enum line_type type = line->type;
2243 int textlen = strlen(text);
2246 wmove(view->win, lineno, 0);
2250 wchgat(view->win, -1, 0, type, NULL);
2253 attr = get_line_attr(type);
2254 wattrset(view->win, attr);
2256 if (opt_line_number || opt_tab_size < TABSIZE) {
2257 static char spaces[] = " ";
2258 int col_offset = 0, col = 0;
2260 if (opt_line_number) {
2261 unsigned long real_lineno = view->offset + lineno + 1;
2263 if (real_lineno == 1 ||
2264 (real_lineno % opt_num_interval) == 0) {
2265 wprintw(view->win, "%.*d", view->digits, real_lineno);
2268 waddnstr(view->win, spaces,
2269 MIN(view->digits, STRING_SIZE(spaces)));
2271 waddstr(view->win, ": ");
2272 col_offset = view->digits + 2;
2275 while (text && col_offset + col < view->width) {
2276 int cols_max = view->width - col_offset - col;
2280 if (*text == '\t') {
2282 assert(sizeof(spaces) > TABSIZE);
2284 cols = opt_tab_size - (col % opt_tab_size);
2287 text = strchr(text, '\t');
2288 cols = line ? text - pos : strlen(pos);
2291 waddnstr(view->win, pos, MIN(cols, cols_max));
2296 int col = 0, pos = 0;
2298 for (; pos < textlen && col < view->width; pos++, col++)
2299 if (text[pos] == '\t')
2300 col += TABSIZE - (col % TABSIZE) - 1;
2302 waddnstr(view->win, text, pos);
2309 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2311 char refbuf[SIZEOF_STR];
2315 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2318 pipe = popen(refbuf, "r");
2322 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2323 ref = chomp_string(ref);
2329 /* This is the only fatal call, since it can "corrupt" the buffer. */
2330 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2337 add_pager_refs(struct view *view, struct line *line)
2339 char buf[SIZEOF_STR];
2340 char *commit_id = line->data + STRING_SIZE("commit ");
2342 size_t bufpos = 0, refpos = 0;
2343 const char *sep = "Refs: ";
2344 bool is_tag = FALSE;
2346 assert(line->type == LINE_COMMIT);
2348 refs = get_refs(commit_id);
2350 if (view == VIEW(REQ_VIEW_DIFF))
2351 goto try_add_describe_ref;
2356 struct ref *ref = refs[refpos];
2357 char *fmt = ref->tag ? "%s[%s]" :
2358 ref->remote ? "%s<%s>" : "%s%s";
2360 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2365 } while (refs[refpos++]->next);
2367 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2368 try_add_describe_ref:
2369 /* Add <tag>-g<commit_id> "fake" reference. */
2370 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2377 if (!realloc_lines(view, view->line_size + 1))
2380 line = &view->line[view->lines];
2381 line->data = strdup(buf);
2385 line->type = LINE_PP_REFS;
2390 pager_read(struct view *view, char *data)
2392 struct line *line = &view->line[view->lines];
2394 line->data = strdup(data);
2398 line->type = get_line_type(line->data);
2401 if (line->type == LINE_COMMIT &&
2402 (view == VIEW(REQ_VIEW_DIFF) ||
2403 view == VIEW(REQ_VIEW_LOG)))
2404 add_pager_refs(view, line);
2410 pager_enter(struct view *view, struct line *line)
2414 if (line->type == LINE_COMMIT &&
2415 (view == VIEW(REQ_VIEW_LOG) ||
2416 view == VIEW(REQ_VIEW_PAGER))) {
2417 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2421 /* Always scroll the view even if it was split. That way
2422 * you can use Enter to scroll through the log view and
2423 * split open each commit diff. */
2424 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2426 /* FIXME: A minor workaround. Scrolling the view will call report("")
2427 * but if we are scrolling a non-current view this won't properly
2428 * update the view title. */
2430 update_view_title(view);
2436 pager_grep(struct view *view, struct line *line)
2439 char *text = line->data;
2444 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2451 pager_select(struct view *view, struct line *line)
2453 if (line->type == LINE_COMMIT) {
2454 char *text = line->data;
2456 string_copy(view->ref, text + STRING_SIZE("commit "));
2457 string_copy(ref_commit, view->ref);
2461 static struct view_ops pager_ops = {
2475 /* Parse output from git-ls-tree(1):
2477 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2478 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2479 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2480 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2483 #define SIZEOF_TREE_ATTR \
2484 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2486 #define TREE_UP_FORMAT "040000 tree %s\t.."
2489 tree_compare_entry(enum line_type type1, char *name1,
2490 enum line_type type2, char *name2)
2492 if (type1 != type2) {
2493 if (type1 == LINE_TREE_DIR)
2498 return strcmp(name1, name2);
2502 tree_read(struct view *view, char *text)
2504 size_t textlen = strlen(text);
2505 char buf[SIZEOF_STR];
2507 enum line_type type;
2508 bool first_read = view->lines == 0;
2510 if (textlen <= SIZEOF_TREE_ATTR)
2513 type = text[STRING_SIZE("100644 ")] == 't'
2514 ? LINE_TREE_DIR : LINE_TREE_FILE;
2517 /* Add path info line */
2518 if (string_format(buf, "Directory path /%s", opt_path) &&
2519 realloc_lines(view, view->line_size + 1) &&
2520 pager_read(view, buf))
2521 view->line[view->lines - 1].type = LINE_DEFAULT;
2525 /* Insert "link" to parent directory. */
2527 string_format(buf, TREE_UP_FORMAT, view->ref) &&
2528 realloc_lines(view, view->line_size + 1) &&
2529 pager_read(view, buf))
2530 view->line[view->lines - 1].type = LINE_TREE_DIR;
2535 /* Strip the path part ... */
2537 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2538 size_t striplen = strlen(opt_path);
2539 char *path = text + SIZEOF_TREE_ATTR;
2541 if (pathlen > striplen)
2542 memmove(path, path + striplen,
2543 pathlen - striplen + 1);
2546 /* Skip "Directory ..." and ".." line. */
2547 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2548 struct line *line = &view->line[pos];
2549 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2550 char *path2 = text + SIZEOF_TREE_ATTR;
2551 int cmp = tree_compare_entry(line->type, path1, type, path2);
2556 text = strdup(text);
2560 if (view->lines > pos)
2561 memmove(&view->line[pos + 1], &view->line[pos],
2562 (view->lines - pos) * sizeof(*line));
2564 line = &view->line[pos];
2571 if (!pager_read(view, text))
2574 /* Move the current line to the first tree entry. */
2578 view->line[view->lines - 1].type = type;
2583 tree_enter(struct view *view, struct line *line)
2585 enum open_flags flags;
2586 enum request request;
2588 switch (line->type) {
2590 /* Depending on whether it is a subdir or parent (updir?) link
2591 * mangle the path buffer. */
2592 if (line == &view->line[1] && *opt_path) {
2593 size_t path_len = strlen(opt_path);
2594 char *dirsep = opt_path + path_len - 1;
2596 while (dirsep > opt_path && dirsep[-1] != '/')
2602 size_t pathlen = strlen(opt_path);
2603 size_t origlen = pathlen;
2604 char *data = line->data;
2605 char *basename = data + SIZEOF_TREE_ATTR;
2607 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2608 opt_path[origlen] = 0;
2613 /* Trees and subtrees share the same ID, so they are not not
2614 * unique like blobs. */
2615 flags = OPEN_RELOAD;
2616 request = REQ_VIEW_TREE;
2619 case LINE_TREE_FILE:
2620 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2621 request = REQ_VIEW_BLOB;
2628 open_view(view, request, flags);
2634 tree_select(struct view *view, struct line *line)
2636 char *text = line->data;
2638 text += STRING_SIZE("100644 blob ");
2640 if (line->type == LINE_TREE_FILE) {
2641 string_ncopy(ref_blob, text, 40);
2642 /* Also update the blob view's ref, since all there must always
2644 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2646 } else if (line->type != LINE_TREE_DIR) {
2650 string_ncopy(view->ref, text, 40);
2653 static struct view_ops tree_ops = {
2663 blob_read(struct view *view, char *line)
2665 bool state = pager_read(view, line);
2668 view->line[view->lines - 1].type = LINE_DEFAULT;
2673 static struct view_ops blob_ops = {
2688 char id[SIZEOF_REV]; /* SHA1 ID. */
2689 char title[128]; /* First line of the commit message. */
2690 char author[75]; /* Author of the commit. */
2691 struct tm time; /* Date from the author ident. */
2692 struct ref **refs; /* Repository references. */
2693 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2694 size_t graph_size; /* The width of the graph array. */
2698 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2700 char buf[DATE_COLS + 1];
2701 struct commit *commit = line->data;
2702 enum line_type type;
2708 if (!*commit->author)
2711 wmove(view->win, lineno, col);
2715 wattrset(view->win, get_line_attr(type));
2716 wchgat(view->win, -1, 0, type, NULL);
2719 type = LINE_MAIN_COMMIT;
2720 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
2723 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
2724 waddnstr(view->win, buf, timelen);
2725 waddstr(view->win, " ");
2728 wmove(view->win, lineno, col);
2729 if (type != LINE_CURSOR)
2730 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
2733 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2735 authorlen = strlen(commit->author);
2736 if (authorlen > AUTHOR_COLS - 2) {
2737 authorlen = AUTHOR_COLS - 2;
2743 waddnstr(view->win, commit->author, authorlen);
2744 if (type != LINE_CURSOR)
2745 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
2746 waddch(view->win, '~');
2748 waddstr(view->win, commit->author);
2752 if (type != LINE_CURSOR)
2753 wattrset(view->win, A_NORMAL);
2755 if (opt_rev_graph && commit->graph_size) {
2758 wmove(view->win, lineno, col);
2759 /* Using waddch() instead of waddnstr() ensures that
2760 * they'll be rendered correctly for the cursor line. */
2761 for (i = 0; i < commit->graph_size; i++)
2762 waddch(view->win, commit->graph[i]);
2764 col += commit->graph_size + 1;
2767 wmove(view->win, lineno, col);
2773 if (type == LINE_CURSOR)
2775 else if (commit->refs[i]->tag)
2776 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2777 else if (commit->refs[i]->remote)
2778 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
2780 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2781 waddstr(view->win, "[");
2782 waddstr(view->win, commit->refs[i]->name);
2783 waddstr(view->win, "]");
2784 if (type != LINE_CURSOR)
2785 wattrset(view->win, A_NORMAL);
2786 waddstr(view->win, " ");
2787 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
2788 } while (commit->refs[i++]->next);
2791 if (type != LINE_CURSOR)
2792 wattrset(view->win, get_line_attr(type));
2795 int titlelen = strlen(commit->title);
2797 if (col + titlelen > view->width)
2798 titlelen = view->width - col;
2800 waddnstr(view->win, commit->title, titlelen);
2806 /* Reads git log --pretty=raw output and parses it into the commit struct. */
2808 main_read(struct view *view, char *line)
2810 enum line_type type = get_line_type(line);
2811 struct commit *commit = view->lines
2812 ? view->line[view->lines - 1].data : NULL;
2816 commit = calloc(1, sizeof(struct commit));
2820 line += STRING_SIZE("commit ");
2822 view->line[view->lines++].data = commit;
2823 string_copy(commit->id, line);
2824 commit->refs = get_refs(commit->id);
2825 commit->graph[commit->graph_size++] = ACS_LTEE;
2830 /* Parse author lines where the name may be empty:
2831 * author <email@address.tld> 1138474660 +0100
2833 char *ident = line + STRING_SIZE("author ");
2834 char *nameend = strchr(ident, '<');
2835 char *emailend = strchr(ident, '>');
2837 if (!commit || !nameend || !emailend)
2840 *nameend = *emailend = 0;
2841 ident = chomp_string(ident);
2843 ident = chomp_string(nameend + 1);
2848 string_copy(commit->author, ident);
2850 /* Parse epoch and timezone */
2851 if (emailend[1] == ' ') {
2852 char *secs = emailend + 2;
2853 char *zone = strchr(secs, ' ');
2854 time_t time = (time_t) atol(secs);
2856 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
2860 tz = ('0' - zone[1]) * 60 * 60 * 10;
2861 tz += ('0' - zone[2]) * 60 * 60;
2862 tz += ('0' - zone[3]) * 60;
2863 tz += ('0' - zone[4]) * 60;
2871 gmtime_r(&time, &commit->time);
2879 /* Fill in the commit title if it has not already been set. */
2880 if (commit->title[0])
2883 /* Require titles to start with a non-space character at the
2884 * offset used by git log. */
2885 if (strncmp(line, " ", 4))
2888 /* Well, if the title starts with a whitespace character,
2889 * try to be forgiving. Otherwise we end up with no title. */
2890 while (isspace(*line))
2894 /* FIXME: More graceful handling of titles; append "..." to
2895 * shortened titles, etc. */
2897 string_copy(commit->title, line);
2904 main_enter(struct view *view, struct line *line)
2906 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2908 open_view(view, REQ_VIEW_DIFF, flags);
2913 main_grep(struct view *view, struct line *line)
2915 struct commit *commit = line->data;
2916 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2917 char buf[DATE_COLS + 1];
2920 for (state = S_TITLE; state < S_END; state++) {
2924 case S_TITLE: text = commit->title; break;
2925 case S_AUTHOR: text = commit->author; break;
2927 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2936 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
2944 main_select(struct view *view, struct line *line)
2946 struct commit *commit = line->data;
2948 string_copy(view->ref, commit->id);
2949 string_copy(ref_commit, view->ref);
2952 static struct view_ops main_ops = {
2963 * Unicode / UTF-8 handling
2965 * NOTE: Much of the following code for dealing with unicode is derived from
2966 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2967 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2970 /* I've (over)annotated a lot of code snippets because I am not entirely
2971 * confident that the approach taken by this small UTF-8 interface is correct.
2975 unicode_width(unsigned long c)
2978 (c <= 0x115f /* Hangul Jamo */
2981 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2983 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2984 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2985 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2986 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2987 || (c >= 0xffe0 && c <= 0xffe6)
2988 || (c >= 0x20000 && c <= 0x2fffd)
2989 || (c >= 0x30000 && c <= 0x3fffd)))
2995 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2996 * Illegal bytes are set one. */
2997 static const unsigned char utf8_bytes[256] = {
2998 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,
2999 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,
3000 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,
3001 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
3002 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
3003 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
3004 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,
3005 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,
3008 /* Decode UTF-8 multi-byte representation into a unicode character. */
3009 static inline unsigned long
3010 utf8_to_unicode(const char *string, size_t length)
3012 unsigned long unicode;
3016 unicode = string[0];
3019 unicode = (string[0] & 0x1f) << 6;
3020 unicode += (string[1] & 0x3f);
3023 unicode = (string[0] & 0x0f) << 12;
3024 unicode += ((string[1] & 0x3f) << 6);
3025 unicode += (string[2] & 0x3f);
3028 unicode = (string[0] & 0x0f) << 18;
3029 unicode += ((string[1] & 0x3f) << 12);
3030 unicode += ((string[2] & 0x3f) << 6);
3031 unicode += (string[3] & 0x3f);
3034 unicode = (string[0] & 0x0f) << 24;
3035 unicode += ((string[1] & 0x3f) << 18);
3036 unicode += ((string[2] & 0x3f) << 12);
3037 unicode += ((string[3] & 0x3f) << 6);
3038 unicode += (string[4] & 0x3f);
3041 unicode = (string[0] & 0x01) << 30;
3042 unicode += ((string[1] & 0x3f) << 24);
3043 unicode += ((string[2] & 0x3f) << 18);
3044 unicode += ((string[3] & 0x3f) << 12);
3045 unicode += ((string[4] & 0x3f) << 6);
3046 unicode += (string[5] & 0x3f);
3049 die("Invalid unicode length");
3052 /* Invalid characters could return the special 0xfffd value but NUL
3053 * should be just as good. */
3054 return unicode > 0xffff ? 0 : unicode;
3057 /* Calculates how much of string can be shown within the given maximum width
3058 * and sets trimmed parameter to non-zero value if all of string could not be
3061 * Additionally, adds to coloffset how many many columns to move to align with
3062 * the expected position. Takes into account how multi-byte and double-width
3063 * characters will effect the cursor position.
3065 * Returns the number of bytes to output from string to satisfy max_width. */
3067 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3069 const char *start = string;
3070 const char *end = strchr(string, '\0');
3076 while (string < end) {
3077 int c = *(unsigned char *) string;
3078 unsigned char bytes = utf8_bytes[c];
3080 unsigned long unicode;
3082 if (string + bytes > end)
3085 /* Change representation to figure out whether
3086 * it is a single- or double-width character. */
3088 unicode = utf8_to_unicode(string, bytes);
3089 /* FIXME: Graceful handling of invalid unicode character. */
3093 ucwidth = unicode_width(unicode);
3095 if (width > max_width) {
3100 /* The column offset collects the differences between the
3101 * number of bytes encoding a character and the number of
3102 * columns will be used for rendering said character.
3104 * So if some character A is encoded in 2 bytes, but will be
3105 * represented on the screen using only 1 byte this will and up
3106 * adding 1 to the multi-byte column offset.
3108 * Assumes that no double-width character can be encoding in
3109 * less than two bytes. */
3110 if (bytes > ucwidth)
3111 mbwidth += bytes - ucwidth;
3116 *coloffset += mbwidth;
3118 return string - start;
3126 /* Whether or not the curses interface has been initialized. */
3127 static bool cursed = FALSE;
3129 /* The status window is used for polling keystrokes. */
3130 static WINDOW *status_win;
3132 static bool status_empty = TRUE;
3134 /* Update status and title window. */
3136 report(const char *msg, ...)
3138 struct view *view = display[current_view];
3143 if (!status_empty || *msg) {
3146 va_start(args, msg);
3148 wmove(status_win, 0, 0);
3150 vwprintw(status_win, msg, args);
3151 status_empty = FALSE;
3153 status_empty = TRUE;
3155 wclrtoeol(status_win);
3156 wrefresh(status_win);
3161 update_view_title(view);
3162 update_display_cursor(view);
3165 /* Controls when nodelay should be in effect when polling user input. */
3167 set_nonblocking_input(bool loading)
3169 static unsigned int loading_views;
3171 if ((loading == FALSE && loading_views-- == 1) ||
3172 (loading == TRUE && loading_views++ == 0))
3173 nodelay(status_win, loading);
3181 /* Initialize the curses library */
3182 if (isatty(STDIN_FILENO)) {
3183 cursed = !!initscr();
3185 /* Leave stdin and stdout alone when acting as a pager. */
3186 FILE *io = fopen("/dev/tty", "r+");
3189 die("Failed to open /dev/tty");
3190 cursed = !!newterm(NULL, io, io);
3194 die("Failed to initialize curses");
3196 nonl(); /* Tell curses not to do NL->CR/NL on output */
3197 cbreak(); /* Take input chars one at a time, no wait for \n */
3198 noecho(); /* Don't echo input */
3199 leaveok(stdscr, TRUE);
3204 getmaxyx(stdscr, y, x);
3205 status_win = newwin(1, 0, y - 1, 0);
3207 die("Failed to create status window");
3209 /* Enable keyboard mapping */
3210 keypad(status_win, TRUE);
3211 wbkgdset(status_win, get_line_attr(LINE_STATUS));
3215 read_prompt(const char *prompt)
3217 enum { READING, STOP, CANCEL } status = READING;
3218 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
3221 while (status == READING) {
3227 foreach_view (view, i)
3232 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
3233 wclrtoeol(status_win);
3235 /* Refresh, accept single keystroke of input */
3236 key = wgetch(status_win);
3241 status = pos ? STOP : CANCEL;
3259 if (pos >= sizeof(buf)) {
3260 report("Input string too long");
3265 buf[pos++] = (char) key;
3269 /* Clear the status window */
3270 status_empty = FALSE;
3273 if (status == CANCEL)
3282 * Repository references
3285 static struct ref *refs;
3286 static size_t refs_size;
3288 /* Id <-> ref store */
3289 static struct ref ***id_refs;
3290 static size_t id_refs_size;
3292 static struct ref **
3295 struct ref ***tmp_id_refs;
3296 struct ref **ref_list = NULL;
3297 size_t ref_list_size = 0;
3300 for (i = 0; i < id_refs_size; i++)
3301 if (!strcmp(id, id_refs[i][0]->id))
3304 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3308 id_refs = tmp_id_refs;
3310 for (i = 0; i < refs_size; i++) {
3313 if (strcmp(id, refs[i].id))
3316 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
3324 if (ref_list_size > 0)
3325 ref_list[ref_list_size - 1]->next = 1;
3326 ref_list[ref_list_size] = &refs[i];
3328 /* XXX: The properties of the commit chains ensures that we can
3329 * safely modify the shared ref. The repo references will
3330 * always be similar for the same id. */
3331 ref_list[ref_list_size]->next = 0;
3336 id_refs[id_refs_size++] = ref_list;
3342 read_ref(char *id, int idlen, char *name, int namelen)
3346 bool remote = FALSE;
3348 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3349 /* Commits referenced by tags has "^{}" appended. */
3350 if (name[namelen - 1] != '}')
3353 while (namelen > 0 && name[namelen] != '^')
3357 namelen -= STRING_SIZE("refs/tags/");
3358 name += STRING_SIZE("refs/tags/");
3360 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
3362 namelen -= STRING_SIZE("refs/remotes/");
3363 name += STRING_SIZE("refs/remotes/");
3365 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
3366 namelen -= STRING_SIZE("refs/heads/");
3367 name += STRING_SIZE("refs/heads/");
3369 } else if (!strcmp(name, "HEAD")) {
3373 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3377 ref = &refs[refs_size++];
3378 ref->name = malloc(namelen + 1);
3382 strncpy(ref->name, name, namelen);
3383 ref->name[namelen] = 0;
3385 ref->remote = remote;
3386 string_copy(ref->id, id);
3394 const char *cmd_env = getenv("TIG_LS_REMOTE");
3395 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
3397 return read_properties(popen(cmd, "r"), "\t", read_ref);
3401 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
3403 if (!strcmp(name, "i18n.commitencoding"))
3404 string_copy(opt_encoding, value);
3410 load_repo_config(void)
3412 return read_properties(popen("git repo-config --list", "r"),
3413 "=", read_repo_config_option);
3417 read_properties(FILE *pipe, const char *separators,
3418 int (*read_property)(char *, int, char *, int))
3420 char buffer[BUFSIZ];
3427 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
3432 name = chomp_string(name);
3433 namelen = strcspn(name, separators);
3435 if (name[namelen]) {
3437 value = chomp_string(name + namelen + 1);
3438 valuelen = strlen(value);
3445 state = read_property(name, namelen, value, valuelen);
3448 if (state != ERR && ferror(pipe))
3461 static void __NORETURN
3464 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3470 static void __NORETURN
3471 die(const char *err, ...)
3477 va_start(args, err);
3478 fputs("tig: ", stderr);
3479 vfprintf(stderr, err, args);
3480 fputs("\n", stderr);
3487 main(int argc, char *argv[])
3490 enum request request;
3493 signal(SIGINT, quit);
3495 if (setlocale(LC_ALL, "")) {
3496 string_copy(opt_codeset, nl_langinfo(CODESET));
3499 if (load_options() == ERR)
3500 die("Failed to load user config.");
3502 /* Load the repo config file so options can be overwritten from
3503 * the command line. */
3504 if (load_repo_config() == ERR)
3505 die("Failed to load repo config.");
3507 if (!parse_options(argc, argv))
3510 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3511 opt_iconv = iconv_open(opt_codeset, opt_encoding);
3512 if (opt_iconv == ICONV_NONE)
3513 die("Failed to initialize character set conversion");
3516 if (load_refs() == ERR)
3517 die("Failed to load refs.");
3519 /* Require a git repository unless when running in pager mode. */
3520 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3521 die("Not a git repository");
3523 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3524 view->cmd_env = getenv(view->cmd_env);
3526 request = opt_request;
3530 while (view_driver(display[current_view], request)) {
3534 foreach_view (view, i)
3537 /* Refresh, accept single keystroke of input */
3538 key = wgetch(status_win);
3540 /* wgetch() with nodelay() enabled returns ERR when there's no
3547 request = get_keybinding(display[current_view]->keymap, key);
3549 /* Some low-level request handling. This keeps access to
3550 * status_win restricted. */
3554 char *cmd = read_prompt(":");
3556 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3557 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3558 opt_request = REQ_VIEW_DIFF;
3560 opt_request = REQ_VIEW_PAGER;
3569 case REQ_SEARCH_BACK:
3571 const char *prompt = request == REQ_SEARCH
3573 char *search = read_prompt(prompt);
3576 string_copy(opt_search, search);
3581 case REQ_SCREEN_RESIZE:
3585 getmaxyx(stdscr, height, width);
3587 /* Resize the status view and let the view driver take
3588 * care of resizing the displayed views. */
3589 wresize(status_win, 1, width);
3590 mvwin(status_win, height - 1, 0);
3591 wrefresh(status_win);