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-0.3"
36 #define __NORETURN __attribute__((__noreturn__))
41 static void __NORETURN die(const char *err, ...);
42 static void report(const char *msg, ...);
43 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
44 static void set_nonblocking_input(bool loading);
45 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
46 static void load_help_page(void);
48 #define ABS(x) ((x) >= 0 ? (x) : -(x))
49 #define MIN(x, y) ((x) < (y) ? (x) : (y))
51 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
52 #define STRING_SIZE(x) (sizeof(x) - 1)
54 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
55 #define SIZEOF_CMD 1024 /* Size of command buffer. */
56 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
58 /* This color name can be used to refer to the default term colors. */
59 #define COLOR_DEFAULT (-1)
61 /* The format and size of the date column in the main view. */
62 #define DATE_FORMAT "%Y-%m-%d %H:%M"
63 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
65 #define AUTHOR_COLS 20
67 /* The default interval between line numbers. */
68 #define NUMBER_INTERVAL 1
72 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
74 #define TIG_LS_REMOTE \
75 "git ls-remote . 2>/dev/null"
77 #define TIG_DIFF_CMD \
78 "git show --patch-with-stat --find-copies-harder -B -C %s"
81 "git log --cc --stat -n100 %s"
83 #define TIG_MAIN_CMD \
84 "git log --topo-order --stat --pretty=raw %s"
86 /* XXX: Needs to be defined to the empty string. */
87 #define TIG_HELP_CMD ""
88 #define TIG_PAGER_CMD ""
90 /* Some ascii-shorthands fitted into the ncurses namespace. */
92 #define KEY_RETURN '\r'
97 char *name; /* Ref name; tag or head names are shortened. */
98 char id[41]; /* Commit SHA1 ID */
99 unsigned int tag:1; /* Is it a tag? */
100 unsigned int next:1; /* For ref lists: are there more refs? */
103 static struct ref **get_refs(char *id);
112 set_from_int_map(struct int_map *map, size_t map_size,
113 int *value, const char *name, int namelen)
118 for (i = 0; i < map_size; i++)
119 if (namelen == map[i].namelen &&
120 !strncasecmp(name, map[i].name, namelen)) {
121 *value = map[i].value;
134 string_ncopy(char *dst, const char *src, int dstlen)
136 strncpy(dst, src, dstlen - 1);
141 /* Shorthand for safely copying into a fixed buffer. */
142 #define string_copy(dst, src) \
143 string_ncopy(dst, src, sizeof(dst))
146 chomp_string(char *name)
150 while (isspace(*name))
153 namelen = strlen(name) - 1;
154 while (namelen > 0 && isspace(name[namelen]))
161 string_nformat(char *buf, size_t bufsize, int *bufpos, const char *fmt, ...)
164 int pos = bufpos ? *bufpos : 0;
167 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
173 return pos >= bufsize ? FALSE : TRUE;
176 #define string_format(buf, fmt, args...) \
177 string_nformat(buf, sizeof(buf), NULL, fmt, args)
179 #define string_format_from(buf, from, fmt, args...) \
180 string_nformat(buf, sizeof(buf), from, fmt, args)
184 * NOTE: The following is a slightly modified copy of the git project's shell
185 * quoting routines found in the quote.c file.
187 * Help to copy the thing properly quoted for the shell safety. any single
188 * quote is replaced with '\'', any exclamation point is replaced with '\!',
189 * and the whole thing is enclosed in a
192 * original sq_quote result
193 * name ==> name ==> 'name'
194 * a b ==> a b ==> 'a b'
195 * a'b ==> a'\''b ==> 'a'\''b'
196 * a!b ==> a'\!'b ==> 'a'\!'b'
200 sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
204 #define BUFPUT(x) do { if (bufsize < SIZEOF_CMD) buf[bufsize++] = (x); } while (0)
207 while ((c = *src++)) {
208 if (c == '\'' || c == '!') {
228 /* XXX: Keep the view request first and in sync with views[]. */ \
229 REQ_GROUP("View switching") \
230 REQ_(VIEW_MAIN, "Show main view"), \
231 REQ_(VIEW_DIFF, "Show diff view"), \
232 REQ_(VIEW_LOG, "Show log view"), \
233 REQ_(VIEW_HELP, "Show help page"), \
234 REQ_(VIEW_PAGER, "Show pager view"), \
236 REQ_GROUP("View manipulation") \
237 REQ_(ENTER, "Enter current line and scroll"), \
238 REQ_(NEXT, "Move to next"), \
239 REQ_(PREVIOUS, "Move to previous"), \
240 REQ_(VIEW_NEXT, "Move focus to next view"), \
241 REQ_(VIEW_CLOSE, "Close the current view"), \
242 REQ_(QUIT, "Close all views and quit"), \
244 REQ_GROUP("Cursor navigation") \
245 REQ_(MOVE_UP, "Move cursor one line up"), \
246 REQ_(MOVE_DOWN, "Move cursor one line down"), \
247 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
248 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
249 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
250 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
252 REQ_GROUP("Scrolling") \
253 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
254 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
255 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
256 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
259 REQ_(PROMPT, "Bring up the prompt"), \
260 REQ_(SCREEN_UPDATE, "Update the screen"), \
261 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
262 REQ_(SCREEN_RESIZE, "Resize the screen"), \
263 REQ_(SHOW_VERSION, "Show version information"), \
264 REQ_(STOP_LOADING, "Stop all loading views"), \
265 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
266 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"),
269 /* User action requests. */
271 #define REQ_GROUP(help)
272 #define REQ_(req, help) REQ_##req
274 /* Offset all requests to avoid conflicts with ncurses getch values. */
275 REQ_OFFSET = KEY_MAX + 1,
282 struct request_info {
283 enum request request;
287 static struct request_info req_info[] = {
288 #define REQ_GROUP(help) { 0, (help) },
289 #define REQ_(req, help) { REQ_##req, (help) }
299 static const char usage[] =
300 VERSION " (" __DATE__ ")\n"
302 "Usage: tig [options]\n"
303 " or: tig [options] [--] [git log options]\n"
304 " or: tig [options] log [git log options]\n"
305 " or: tig [options] diff [git diff options]\n"
306 " or: tig [options] show [git show options]\n"
307 " or: tig [options] < [git command output]\n"
310 " -l Start up in log view\n"
311 " -d Start up in diff view\n"
312 " -n[I], --line-number[=I] Show line numbers with given interval\n"
313 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
314 " -- Mark end of tig options\n"
315 " -v, --version Show version and exit\n"
316 " -h, --help Show help message and exit\n";
318 /* Option and state variables. */
319 static bool opt_line_number = FALSE;
320 static bool opt_rev_graph = TRUE;
321 static int opt_num_interval = NUMBER_INTERVAL;
322 static int opt_tab_size = TABSIZE;
323 static enum request opt_request = REQ_VIEW_MAIN;
324 static char opt_cmd[SIZEOF_CMD] = "";
325 static char opt_encoding[20] = "";
326 static bool opt_utf8 = TRUE;
327 static FILE *opt_pipe = NULL;
335 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
345 int namelen = strlen(name);
349 if (strncmp(opt, name, namelen))
352 if (opt[namelen] == '=')
353 value = opt + namelen + 1;
356 if (!short_name || opt[1] != short_name)
361 va_start(args, type);
362 if (type == OPT_INT) {
363 number = va_arg(args, int *);
365 *number = atoi(value);
372 /* Returns the index of log or diff command or -1 to exit. */
374 parse_options(int argc, char *argv[])
378 for (i = 1; i < argc; i++) {
381 if (!strcmp(opt, "-l")) {
382 opt_request = REQ_VIEW_LOG;
386 if (!strcmp(opt, "-d")) {
387 opt_request = REQ_VIEW_DIFF;
391 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
392 opt_line_number = TRUE;
396 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
397 opt_tab_size = MIN(opt_tab_size, TABSIZE);
401 if (check_option(opt, 'v', "version", OPT_NONE)) {
402 printf("tig version %s\n", VERSION);
406 if (check_option(opt, 'h', "help", OPT_NONE)) {
411 if (!strcmp(opt, "--")) {
416 if (!strcmp(opt, "log") ||
417 !strcmp(opt, "diff") ||
418 !strcmp(opt, "show")) {
419 opt_request = opt[0] == 'l'
420 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
424 if (opt[0] && opt[0] != '-')
427 die("unknown option '%s'\n\n%s", opt, usage);
430 if (!isatty(STDIN_FILENO)) {
431 opt_request = REQ_VIEW_PAGER;
434 } else if (i < argc) {
437 if (opt_request == REQ_VIEW_MAIN)
438 /* XXX: This is vulnerable to the user overriding
439 * options required for the main view parser. */
440 string_copy(opt_cmd, "git log --stat --pretty=raw");
442 string_copy(opt_cmd, "git");
443 buf_size = strlen(opt_cmd);
445 while (buf_size < sizeof(opt_cmd) && i < argc) {
446 opt_cmd[buf_size++] = ' ';
447 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
450 if (buf_size >= sizeof(opt_cmd))
451 die("command too long");
453 opt_cmd[buf_size] = 0;
457 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
465 * Line-oriented content detection.
469 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
470 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
471 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
472 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
473 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
474 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
475 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
476 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
477 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
478 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
479 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
480 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
481 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
482 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
483 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
484 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
485 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
486 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
487 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
488 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
489 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
490 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
491 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
492 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
493 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
494 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
495 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
496 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
497 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
498 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
499 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
500 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
501 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
502 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
503 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
504 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
505 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
506 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
509 #define LINE(type, line, fg, bg, attr) \
516 const char *name; /* Option name. */
517 int namelen; /* Size of option name. */
518 const char *line; /* The start of line to match. */
519 int linelen; /* Size of string to match. */
520 int fg, bg, attr; /* Color and text attributes for the lines. */
523 static struct line_info line_info[] = {
524 #define LINE(type, line, fg, bg, attr) \
525 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
530 static enum line_type
531 get_line_type(char *line)
533 int linelen = strlen(line);
536 for (type = 0; type < ARRAY_SIZE(line_info); type++)
537 /* Case insensitive search matches Signed-off-by lines better. */
538 if (linelen >= line_info[type].linelen &&
539 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
546 get_line_attr(enum line_type type)
548 assert(type < ARRAY_SIZE(line_info));
549 return COLOR_PAIR(type) | line_info[type].attr;
552 static struct line_info *
553 get_line_info(char *name, int namelen)
558 /* Diff-Header -> DIFF_HEADER */
559 for (i = 0; i < namelen; i++) {
562 else if (name[i] == '.')
566 for (type = 0; type < ARRAY_SIZE(line_info); type++)
567 if (namelen == line_info[type].namelen &&
568 !strncasecmp(line_info[type].name, name, namelen))
569 return &line_info[type];
577 int default_bg = COLOR_BLACK;
578 int default_fg = COLOR_WHITE;
583 if (use_default_colors() != ERR) {
588 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
589 struct line_info *info = &line_info[type];
590 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
591 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
593 init_pair(type, fg, bg);
599 void *data; /* User data */
604 * User config file handling.
607 static struct int_map color_map[] = {
608 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
620 #define set_color(color, name) \
621 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
623 static struct int_map attr_map[] = {
624 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
634 #define set_attribute(attr, name) \
635 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
637 static int config_lineno;
638 static bool config_errors;
639 static char *config_msg;
641 /* Wants: object fgcolor bgcolor [attr] */
643 option_color_command(int argc, char *argv[])
645 struct line_info *info;
647 if (argc != 3 && argc != 4) {
648 config_msg = "Wrong number of arguments given to color command";
652 info = get_line_info(argv[0], strlen(argv[0]));
654 config_msg = "Unknown color name";
658 if (set_color(&info->fg, argv[1]) == ERR) {
659 config_msg = "Unknown color";
663 if (set_color(&info->bg, argv[2]) == ERR) {
664 config_msg = "Unknown color";
668 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
669 config_msg = "Unknown attribute";
676 /* Wants: name = value */
678 option_set_command(int argc, char *argv[])
681 config_msg = "Wrong number of arguments given to set command";
685 if (strcmp(argv[1], "=")) {
686 config_msg = "No value assigned";
690 if (!strcmp(argv[0], "show-rev-graph")) {
691 opt_rev_graph = (!strcmp(argv[2], "1") ||
692 !strcmp(argv[2], "true") ||
693 !strcmp(argv[2], "yes"));
697 if (!strcmp(argv[0], "line-number-interval")) {
698 opt_num_interval = atoi(argv[2]);
702 if (!strcmp(argv[0], "tab-size")) {
703 opt_tab_size = atoi(argv[2]);
707 if (!strcmp(argv[0], "encoding")) {
708 string_copy(opt_encoding, argv[2]);
716 set_option(char *opt, char *value)
723 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
724 argv[argc++] = value;
731 while (isspace(*value))
735 if (!strcmp(opt, "color"))
736 return option_color_command(argc, argv);
738 if (!strcmp(opt, "set"))
739 return option_set_command(argc, argv);
745 read_option(char *opt, int optlen, char *value, int valuelen)
748 config_msg = "Internal error";
750 optlen = strcspn(opt, "#;");
752 /* The whole line is a commend or empty. */
755 } else if (opt[optlen] != 0) {
756 /* Part of the option name is a comment, so the value part
757 * should be ignored. */
759 opt[optlen] = value[valuelen] = 0;
761 /* Else look for comment endings in the value. */
762 valuelen = strcspn(value, "#;");
766 if (set_option(opt, value) == ERR) {
767 fprintf(stderr, "Error on line %d, near '%.*s' option: %s\n",
768 config_lineno, optlen, opt, config_msg);
769 config_errors = TRUE;
772 /* Always keep going if errors are encountered. */
779 char *home = getenv("HOME");
784 config_errors = FALSE;
786 if (!home || !string_format(buf, "%s/.tigrc", home))
789 /* It's ok that the file doesn't exist. */
790 file = fopen(buf, "r");
794 if (read_properties(file, " \t", read_option) == ERR ||
795 config_errors == TRUE)
796 fprintf(stderr, "Errors while loading %s.\n", buf);
809 /* The display array of active views and the index of the current view. */
810 static struct view *display[2];
811 static unsigned int current_view;
813 #define foreach_view(view, i) \
814 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
816 #define displayed_views() (display[1] != NULL ? 2 : 1)
818 /* Current head and commit ID */
819 static char ref_commit[SIZEOF_REF] = "HEAD";
820 static char ref_head[SIZEOF_REF] = "HEAD";
823 const char *name; /* View name */
824 const char *cmd_fmt; /* Default command line format */
825 const char *cmd_env; /* Command line set via environment */
826 const char *id; /* Points to either of ref_{head,commit} */
828 struct view_ops *ops; /* View operations */
830 char cmd[SIZEOF_CMD]; /* Command buffer */
831 char ref[SIZEOF_REF]; /* Hovered commit reference */
832 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
834 int height, width; /* The width and height of the main window */
835 WINDOW *win; /* The main window */
836 WINDOW *title; /* The title window living below the main window */
839 unsigned long offset; /* Offset of the window top */
840 unsigned long lineno; /* Current line number */
842 /* If non-NULL, points to the view that opened this view. If this view
843 * is closed tig will switch back to the parent view. */
847 unsigned long lines; /* Total number of lines */
848 struct line *line; /* Line index */
849 unsigned long line_size;/* Total number of allocated lines */
850 unsigned int digits; /* Number of digits in the lines member. */
858 /* What type of content being displayed. Used in the title bar. */
860 /* Draw one line; @lineno must be < view->height. */
861 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
862 /* Read one line; updates view->line. */
863 bool (*read)(struct view *view, char *data);
864 /* Depending on view, change display based on current line. */
865 bool (*enter)(struct view *view, struct line *line);
868 static struct view_ops pager_ops;
869 static struct view_ops main_ops;
871 #define VIEW_STR(name, cmd, env, ref, ops) \
872 { name, cmd, #env, ref, ops }
874 #define VIEW_(id, name, ops, ref) \
875 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops)
878 static struct view views[] = {
879 VIEW_(MAIN, "main", &main_ops, ref_head),
880 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
881 VIEW_(LOG, "log", &pager_ops, ref_head),
882 VIEW_(HELP, "help", &pager_ops, "static"),
883 VIEW_(PAGER, "pager", &pager_ops, "static"),
886 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
890 draw_view_line(struct view *view, unsigned int lineno)
892 if (view->offset + lineno >= view->lines)
895 return view->ops->draw(view, &view->line[view->offset + lineno], lineno);
899 redraw_view_from(struct view *view, int lineno)
901 assert(0 <= lineno && lineno < view->height);
903 for (; lineno < view->height; lineno++) {
904 if (!draw_view_line(view, lineno))
908 redrawwin(view->win);
913 redraw_view(struct view *view)
916 redraw_view_from(view, 0);
921 update_view_title(struct view *view)
923 if (view == display[current_view])
924 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
926 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
929 wmove(view->title, 0, 0);
932 wprintw(view->title, "[%s] %s", view->name, view->ref);
934 wprintw(view->title, "[%s]", view->name);
936 if (view->lines || view->pipe) {
937 unsigned int view_lines = view->offset + view->height;
938 unsigned int lines = view->lines
939 ? MIN(view_lines, view->lines) * 100 / view->lines
942 wprintw(view->title, " - %s %d of %d (%d%%)",
950 time_t secs = time(NULL) - view->start_time;
952 /* Three git seconds are a long time ... */
954 wprintw(view->title, " %lds", secs);
957 wmove(view->title, 0, view->width - 1);
958 wrefresh(view->title);
965 struct view *base = display[0];
966 struct view *view = display[1] ? display[1] : display[0];
968 /* Setup window dimensions */
970 getmaxyx(stdscr, base->height, base->width);
972 /* Make room for the status window. */
976 /* Horizontal split. */
977 view->width = base->width;
978 view->height = SCALE_SPLIT_VIEW(base->height);
979 base->height -= view->height;
981 /* Make room for the title bar. */
985 /* Make room for the title bar. */
990 foreach_view (view, i) {
992 view->win = newwin(view->height, 0, offset, 0);
994 die("Failed to create %s view", view->name);
996 scrollok(view->win, TRUE);
998 view->title = newwin(1, 0, offset + view->height, 0);
1000 die("Failed to create title window");
1003 wresize(view->win, view->height, view->width);
1004 mvwin(view->win, offset, 0);
1005 mvwin(view->title, offset + view->height, 0);
1008 offset += view->height + 1;
1013 redraw_display(void)
1018 foreach_view (view, i) {
1020 update_view_title(view);
1025 update_display_cursor(void)
1027 struct view *view = display[current_view];
1029 /* Move the cursor to the right-most column of the cursor line.
1031 * XXX: This could turn out to be a bit expensive, but it ensures that
1032 * the cursor does not jump around. */
1034 wmove(view->win, view->lineno - view->offset, view->width - 1);
1035 wrefresh(view->win);
1043 /* Scrolling backend */
1045 do_scroll_view(struct view *view, int lines, bool redraw)
1047 /* The rendering expects the new offset. */
1048 view->offset += lines;
1050 assert(0 <= view->offset && view->offset < view->lines);
1053 /* Redraw the whole screen if scrolling is pointless. */
1054 if (view->height < ABS(lines)) {
1058 int line = lines > 0 ? view->height - lines : 0;
1059 int end = line + ABS(lines);
1061 wscrl(view->win, lines);
1063 for (; line < end; line++) {
1064 if (!draw_view_line(view, line))
1069 /* Move current line into the view. */
1070 if (view->lineno < view->offset) {
1071 view->lineno = view->offset;
1072 draw_view_line(view, 0);
1074 } else if (view->lineno >= view->offset + view->height) {
1075 if (view->lineno == view->offset + view->height) {
1076 /* Clear the hidden line so it doesn't show if the view
1077 * is scrolled up. */
1078 wmove(view->win, view->height, 0);
1079 wclrtoeol(view->win);
1081 view->lineno = view->offset + view->height - 1;
1082 draw_view_line(view, view->lineno - view->offset);
1085 assert(view->offset <= view->lineno && view->lineno < view->lines);
1090 redrawwin(view->win);
1091 wrefresh(view->win);
1095 /* Scroll frontend */
1097 scroll_view(struct view *view, enum request request)
1102 case REQ_SCROLL_PAGE_DOWN:
1103 lines = view->height;
1104 case REQ_SCROLL_LINE_DOWN:
1105 if (view->offset + lines > view->lines)
1106 lines = view->lines - view->offset;
1108 if (lines == 0 || view->offset + view->height >= view->lines) {
1109 report("Cannot scroll beyond the last line");
1114 case REQ_SCROLL_PAGE_UP:
1115 lines = view->height;
1116 case REQ_SCROLL_LINE_UP:
1117 if (lines > view->offset)
1118 lines = view->offset;
1121 report("Cannot scroll beyond the first line");
1129 die("request %d not handled in switch", request);
1132 do_scroll_view(view, lines, TRUE);
1137 move_view(struct view *view, enum request request, bool redraw)
1142 case REQ_MOVE_FIRST_LINE:
1143 steps = -view->lineno;
1146 case REQ_MOVE_LAST_LINE:
1147 steps = view->lines - view->lineno - 1;
1150 case REQ_MOVE_PAGE_UP:
1151 steps = view->height > view->lineno
1152 ? -view->lineno : -view->height;
1155 case REQ_MOVE_PAGE_DOWN:
1156 steps = view->lineno + view->height >= view->lines
1157 ? view->lines - view->lineno - 1 : view->height;
1169 die("request %d not handled in switch", request);
1172 if (steps <= 0 && view->lineno == 0) {
1173 report("Cannot move beyond the first line");
1176 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1177 report("Cannot move beyond the last line");
1181 /* Move the current line */
1182 view->lineno += steps;
1183 assert(0 <= view->lineno && view->lineno < view->lines);
1185 /* Repaint the old "current" line if we be scrolling */
1186 if (ABS(steps) < view->height) {
1187 int prev_lineno = view->lineno - steps - view->offset;
1189 wmove(view->win, prev_lineno, 0);
1190 wclrtoeol(view->win);
1191 draw_view_line(view, prev_lineno);
1194 /* Check whether the view needs to be scrolled */
1195 if (view->lineno < view->offset ||
1196 view->lineno >= view->offset + view->height) {
1197 if (steps < 0 && -steps > view->offset) {
1198 steps = -view->offset;
1200 } else if (steps > 0) {
1201 if (view->lineno == view->lines - 1 &&
1202 view->lines > view->height) {
1203 steps = view->lines - view->offset - 1;
1204 if (steps >= view->height)
1205 steps -= view->height - 1;
1209 do_scroll_view(view, steps, redraw);
1213 /* Draw the current line */
1214 draw_view_line(view, view->lineno - view->offset);
1219 redrawwin(view->win);
1220 wrefresh(view->win);
1226 * Incremental updating
1230 end_update(struct view *view)
1234 set_nonblocking_input(FALSE);
1235 if (view->pipe == stdin)
1243 begin_update(struct view *view)
1245 const char *id = view->id;
1251 string_copy(view->cmd, opt_cmd);
1253 /* When running random commands, the view ref could have become
1254 * invalid so clear it. */
1257 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1259 if (!string_format(view->cmd, format, id, id, id, id, id))
1263 /* Special case for the pager view. */
1265 view->pipe = opt_pipe;
1268 view->pipe = popen(view->cmd, "r");
1274 set_nonblocking_input(TRUE);
1279 string_copy(view->vid, id);
1284 for (i = 0; i < view->lines; i++)
1285 if (view->line[i].data)
1286 free(view->line[i].data);
1292 view->start_time = time(NULL);
1297 static struct line *
1298 realloc_lines(struct view *view, size_t line_size)
1300 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1306 view->line_size = line_size;
1311 update_view(struct view *view)
1313 char buffer[BUFSIZ];
1315 /* The number of lines to read. If too low it will cause too much
1316 * redrawing (and possible flickering), if too high responsiveness
1318 unsigned long lines = view->height;
1319 int redraw_from = -1;
1324 /* Only redraw if lines are visible. */
1325 if (view->offset + view->height >= view->lines)
1326 redraw_from = view->lines - view->offset;
1328 if (!realloc_lines(view, view->lines + lines))
1331 while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
1332 int linelen = strlen(line);
1335 line[linelen - 1] = 0;
1337 if (!view->ops->read(view, line))
1347 lines = view->lines;
1348 for (digits = 0; lines; digits++)
1351 /* Keep the displayed view in sync with line number scaling. */
1352 if (digits != view->digits) {
1353 view->digits = digits;
1358 if (redraw_from >= 0) {
1359 /* If this is an incremental update, redraw the previous line
1360 * since for commits some members could have changed when
1361 * loading the main view. */
1362 if (redraw_from > 0)
1365 /* Incrementally draw avoids flickering. */
1366 redraw_view_from(view, redraw_from);
1369 /* Update the title _after_ the redraw so that if the redraw picks up a
1370 * commit reference in view->ref it'll be available here. */
1371 update_view_title(view);
1373 if (ferror(view->pipe)) {
1374 report("Failed to read: %s", strerror(errno));
1377 } else if (feof(view->pipe)) {
1385 report("Allocation failure");
1393 OPEN_DEFAULT = 0, /* Use default view switching. */
1394 OPEN_SPLIT = 1, /* Split current view. */
1395 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1396 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1400 open_view(struct view *prev, enum request request, enum open_flags flags)
1402 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1403 bool split = !!(flags & OPEN_SPLIT);
1404 bool reload = !!(flags & OPEN_RELOAD);
1405 struct view *view = VIEW(request);
1406 int nviews = displayed_views();
1407 struct view *base_view = display[0];
1409 if (view == prev && nviews == 1 && !reload) {
1410 report("Already in %s view", view->name);
1414 if (view == VIEW(REQ_VIEW_HELP)) {
1417 } else if ((reload || strcmp(view->vid, view->id)) &&
1418 !begin_update(view)) {
1419 report("Failed to load %s view", view->name);
1428 /* Maximize the current view. */
1429 memset(display, 0, sizeof(display));
1431 display[current_view] = view;
1434 /* Resize the view when switching between split- and full-screen,
1435 * or when switching between two different full-screen views. */
1436 if (nviews != displayed_views() ||
1437 (nviews == 1 && base_view != display[0]))
1440 if (split && prev->lineno - prev->offset >= prev->height) {
1441 /* Take the title line into account. */
1442 int lines = prev->lineno - prev->offset - prev->height + 1;
1444 /* Scroll the view that was split if the current line is
1445 * outside the new limited view. */
1446 do_scroll_view(prev, lines, TRUE);
1449 if (prev && view != prev) {
1450 if (split && !backgrounded) {
1451 /* "Blur" the previous view. */
1452 update_view_title(prev);
1455 view->parent = prev;
1458 if (view->pipe && view->lines == 0) {
1459 /* Clear the old view and let the incremental updating refill
1468 /* If the view is backgrounded the above calls to report()
1469 * won't redraw the view title. */
1471 update_view_title(view);
1476 * User request switch noodle
1480 view_driver(struct view *view, enum request request)
1487 case REQ_MOVE_PAGE_UP:
1488 case REQ_MOVE_PAGE_DOWN:
1489 case REQ_MOVE_FIRST_LINE:
1490 case REQ_MOVE_LAST_LINE:
1491 move_view(view, request, TRUE);
1494 case REQ_SCROLL_LINE_DOWN:
1495 case REQ_SCROLL_LINE_UP:
1496 case REQ_SCROLL_PAGE_DOWN:
1497 case REQ_SCROLL_PAGE_UP:
1498 scroll_view(view, request);
1505 case REQ_VIEW_PAGER:
1506 open_view(view, request, OPEN_DEFAULT);
1511 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
1513 if (view == VIEW(REQ_VIEW_DIFF) &&
1514 view->parent == VIEW(REQ_VIEW_MAIN)) {
1515 bool redraw = display[1] == view;
1517 view = view->parent;
1518 move_view(view, request, redraw);
1520 update_view_title(view);
1522 move_view(view, request, TRUE);
1529 report("Nothing to enter");
1532 return view->ops->enter(view, &view->line[view->lineno]);
1536 int nviews = displayed_views();
1537 int next_view = (current_view + 1) % nviews;
1539 if (next_view == current_view) {
1540 report("Only one view is displayed");
1544 current_view = next_view;
1545 /* Blur out the title of the previous view. */
1546 update_view_title(view);
1550 case REQ_TOGGLE_LINENO:
1551 opt_line_number = !opt_line_number;
1555 case REQ_TOGGLE_REV_GRAPH:
1556 opt_rev_graph = !opt_rev_graph;
1561 /* Always reload^Wrerun commands from the prompt. */
1562 open_view(view, opt_request, OPEN_RELOAD);
1565 case REQ_STOP_LOADING:
1566 for (i = 0; i < ARRAY_SIZE(views); i++) {
1569 report("Stopped loading the %s view", view->name),
1574 case REQ_SHOW_VERSION:
1575 report("%s (built %s)", VERSION, __DATE__);
1578 case REQ_SCREEN_RESIZE:
1581 case REQ_SCREEN_REDRAW:
1585 case REQ_SCREEN_UPDATE:
1589 case REQ_VIEW_CLOSE:
1590 /* XXX: Mark closed views by letting view->parent point to the
1591 * view itself. Parents to closed view should never be
1594 view->parent->parent != view->parent) {
1595 memset(display, 0, sizeof(display));
1597 display[current_view] = view->parent;
1598 view->parent = view;
1608 /* An unknown key will show most commonly used commands. */
1609 report("Unknown key, press 'h' for help");
1622 pager_draw(struct view *view, struct line *line, unsigned int lineno)
1624 char *text = line->data;
1625 enum line_type type = line->type;
1626 int textlen = strlen(text);
1629 wmove(view->win, lineno, 0);
1631 if (view->offset + lineno == view->lineno) {
1632 if (type == LINE_COMMIT) {
1633 string_copy(view->ref, text + 7);
1634 string_copy(ref_commit, view->ref);
1638 wchgat(view->win, -1, 0, type, NULL);
1641 attr = get_line_attr(type);
1642 wattrset(view->win, attr);
1644 if (opt_line_number || opt_tab_size < TABSIZE) {
1645 static char spaces[] = " ";
1646 int col_offset = 0, col = 0;
1648 if (opt_line_number) {
1649 unsigned long real_lineno = view->offset + lineno + 1;
1651 if (real_lineno == 1 ||
1652 (real_lineno % opt_num_interval) == 0) {
1653 wprintw(view->win, "%.*d", view->digits, real_lineno);
1656 waddnstr(view->win, spaces,
1657 MIN(view->digits, STRING_SIZE(spaces)));
1659 waddstr(view->win, ": ");
1660 col_offset = view->digits + 2;
1663 while (text && col_offset + col < view->width) {
1664 int cols_max = view->width - col_offset - col;
1668 if (*text == '\t') {
1670 assert(sizeof(spaces) > TABSIZE);
1672 cols = opt_tab_size - (col % opt_tab_size);
1675 text = strchr(text, '\t');
1676 cols = line ? text - pos : strlen(pos);
1679 waddnstr(view->win, pos, MIN(cols, cols_max));
1684 int col = 0, pos = 0;
1686 for (; pos < textlen && col < view->width; pos++, col++)
1687 if (text[pos] == '\t')
1688 col += TABSIZE - (col % TABSIZE) - 1;
1690 waddnstr(view->win, text, pos);
1697 add_pager_refs(struct view *view, struct line *line)
1700 char *data = line->data;
1702 int bufpos = 0, refpos = 0;
1703 const char *sep = "Refs: ";
1705 assert(line->type == LINE_COMMIT);
1707 refs = get_refs(data + STRING_SIZE("commit "));
1712 struct ref *ref = refs[refpos];
1713 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
1715 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
1718 } while (refs[refpos++]->next);
1720 if (!realloc_lines(view, view->line_size + 1))
1723 line = &view->line[view->lines];
1724 line->data = strdup(buf);
1728 line->type = LINE_PP_REFS;
1733 pager_read(struct view *view, char *data)
1735 struct line *line = &view->line[view->lines];
1737 line->data = strdup(data);
1741 line->type = get_line_type(line->data);
1744 if (line->type == LINE_COMMIT &&
1745 (view == VIEW(REQ_VIEW_DIFF) ||
1746 view == VIEW(REQ_VIEW_LOG)))
1747 add_pager_refs(view, line);
1753 pager_enter(struct view *view, struct line *line)
1757 if (line->type == LINE_COMMIT &&
1758 (view == VIEW(REQ_VIEW_LOG) ||
1759 view == VIEW(REQ_VIEW_PAGER))) {
1760 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
1764 /* Always scroll the view even if it was split. That way
1765 * you can use Enter to scroll through the log view and
1766 * split open each commit diff. */
1767 scroll_view(view, REQ_SCROLL_LINE_DOWN);
1769 /* FIXME: A minor workaround. Scrolling the view will call report("")
1770 * but if we are scrolling a non-current view this won't properly
1771 * update the view title. */
1773 update_view_title(view);
1778 static struct view_ops pager_ops = {
1791 char id[41]; /* SHA1 ID. */
1792 char title[75]; /* First line of the commit message. */
1793 char author[75]; /* Author of the commit. */
1794 struct tm time; /* Date from the author ident. */
1795 struct ref **refs; /* Repository references. */
1796 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
1797 size_t graph_size; /* The width of the graph array. */
1801 main_draw(struct view *view, struct line *line, unsigned int lineno)
1803 char buf[DATE_COLS + 1];
1804 struct commit *commit = line->data;
1805 enum line_type type;
1811 if (!*commit->author)
1814 wmove(view->win, lineno, col);
1816 if (view->offset + lineno == view->lineno) {
1817 string_copy(view->ref, commit->id);
1818 string_copy(ref_commit, view->ref);
1820 wattrset(view->win, get_line_attr(type));
1821 wchgat(view->win, -1, 0, type, NULL);
1824 type = LINE_MAIN_COMMIT;
1825 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
1828 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
1829 waddnstr(view->win, buf, timelen);
1830 waddstr(view->win, " ");
1833 wmove(view->win, lineno, col);
1834 if (type != LINE_CURSOR)
1835 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
1838 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
1840 authorlen = strlen(commit->author);
1841 if (authorlen > AUTHOR_COLS - 2) {
1842 authorlen = AUTHOR_COLS - 2;
1848 waddnstr(view->win, commit->author, authorlen);
1849 if (type != LINE_CURSOR)
1850 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
1851 waddch(view->win, '~');
1853 waddstr(view->win, commit->author);
1857 if (type != LINE_CURSOR)
1858 wattrset(view->win, A_NORMAL);
1860 if (opt_rev_graph && commit->graph_size) {
1863 wmove(view->win, lineno, col);
1864 /* Using waddch() instead of waddnstr() ensures that
1865 * they'll be rendered correctly for the cursor line. */
1866 for (i = 0; i < commit->graph_size; i++)
1867 waddch(view->win, commit->graph[i]);
1869 col += commit->graph_size + 1;
1872 wmove(view->win, lineno, col);
1878 if (type == LINE_CURSOR)
1880 else if (commit->refs[i]->tag)
1881 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
1883 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
1884 waddstr(view->win, "[");
1885 waddstr(view->win, commit->refs[i]->name);
1886 waddstr(view->win, "]");
1887 if (type != LINE_CURSOR)
1888 wattrset(view->win, A_NORMAL);
1889 waddstr(view->win, " ");
1890 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
1891 } while (commit->refs[i++]->next);
1894 if (type != LINE_CURSOR)
1895 wattrset(view->win, get_line_attr(type));
1898 int titlelen = strlen(commit->title);
1900 if (col + titlelen > view->width)
1901 titlelen = view->width - col;
1903 waddnstr(view->win, commit->title, titlelen);
1909 /* Reads git log --pretty=raw output and parses it into the commit struct. */
1911 main_read(struct view *view, char *line)
1913 enum line_type type = get_line_type(line);
1914 struct commit *commit = view->lines
1915 ? view->line[view->lines - 1].data : NULL;
1919 commit = calloc(1, sizeof(struct commit));
1923 line += STRING_SIZE("commit ");
1925 view->line[view->lines++].data = commit;
1926 string_copy(commit->id, line);
1927 commit->refs = get_refs(commit->id);
1928 commit->graph[commit->graph_size++] = ACS_LTEE;
1933 char *ident = line + STRING_SIZE("author ");
1934 char *end = strchr(ident, '<');
1940 for (; end > ident && isspace(end[-1]); end--) ;
1944 string_copy(commit->author, ident);
1946 /* Parse epoch and timezone */
1948 char *secs = strchr(end + 1, '>');
1952 if (!secs || secs[1] != ' ')
1956 time = (time_t) atol(secs);
1957 zone = strchr(secs, ' ');
1958 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
1962 tz = ('0' - zone[1]) * 60 * 60 * 10;
1963 tz += ('0' - zone[2]) * 60 * 60;
1964 tz += ('0' - zone[3]) * 60;
1965 tz += ('0' - zone[4]) * 60;
1972 gmtime_r(&time, &commit->time);
1980 /* Fill in the commit title if it has not already been set. */
1981 if (commit->title[0])
1984 /* Require titles to start with a non-space character at the
1985 * offset used by git log. */
1986 /* FIXME: More gracefull handling of titles; append "..." to
1987 * shortened titles, etc. */
1988 if (strncmp(line, " ", 4) ||
1992 string_copy(commit->title, line + 4);
1999 main_enter(struct view *view, struct line *line)
2001 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2003 open_view(view, REQ_VIEW_DIFF, flags);
2007 static struct view_ops main_ops = {
2024 static struct keymap keymap[] = {
2025 /* View switching */
2026 { 'm', REQ_VIEW_MAIN },
2027 { 'd', REQ_VIEW_DIFF },
2028 { 'l', REQ_VIEW_LOG },
2029 { 'p', REQ_VIEW_PAGER },
2030 { 'h', REQ_VIEW_HELP },
2031 { '?', REQ_VIEW_HELP },
2033 /* View manipulation */
2034 { 'q', REQ_VIEW_CLOSE },
2035 { KEY_TAB, REQ_VIEW_NEXT },
2036 { KEY_RETURN, REQ_ENTER },
2037 { KEY_UP, REQ_PREVIOUS },
2038 { KEY_DOWN, REQ_NEXT },
2040 /* Cursor navigation */
2041 { 'k', REQ_MOVE_UP },
2042 { 'j', REQ_MOVE_DOWN },
2043 { KEY_HOME, REQ_MOVE_FIRST_LINE },
2044 { KEY_END, REQ_MOVE_LAST_LINE },
2045 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
2046 { ' ', REQ_MOVE_PAGE_DOWN },
2047 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
2048 { 'b', REQ_MOVE_PAGE_UP },
2049 { '-', REQ_MOVE_PAGE_UP },
2052 { KEY_IC, REQ_SCROLL_LINE_UP },
2053 { KEY_DC, REQ_SCROLL_LINE_DOWN },
2054 { 'w', REQ_SCROLL_PAGE_UP },
2055 { 's', REQ_SCROLL_PAGE_DOWN },
2059 { 'z', REQ_STOP_LOADING },
2060 { 'v', REQ_SHOW_VERSION },
2061 { 'r', REQ_SCREEN_REDRAW },
2062 { 'n', REQ_TOGGLE_LINENO },
2063 { 'g', REQ_TOGGLE_REV_GRAPH},
2064 { ':', REQ_PROMPT },
2066 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
2067 { ERR, REQ_SCREEN_UPDATE },
2069 /* Use the ncurses SIGWINCH handler. */
2070 { KEY_RESIZE, REQ_SCREEN_RESIZE },
2074 get_request(int key)
2078 for (i = 0; i < ARRAY_SIZE(keymap); i++)
2079 if (keymap[i].alias == key)
2080 return keymap[i].request;
2082 return (enum request) key;
2090 static struct key key_table[] = {
2091 { "Enter", KEY_RETURN },
2093 { "Backspace", KEY_BACKSPACE },
2095 { "Escape", KEY_ESC },
2096 { "Left", KEY_LEFT },
2097 { "Right", KEY_RIGHT },
2099 { "Down", KEY_DOWN },
2100 { "Insert", KEY_IC },
2101 { "Delete", KEY_DC },
2102 { "Home", KEY_HOME },
2104 { "PageUp", KEY_PPAGE },
2105 { "PageDown", KEY_NPAGE },
2115 { "F10", KEY_F(10) },
2116 { "F11", KEY_F(11) },
2117 { "F12", KEY_F(12) },
2121 get_key(enum request request)
2123 static char buf[BUFSIZ];
2124 static char key_char[] = "'X'";
2131 for (i = 0; i < ARRAY_SIZE(keymap); i++) {
2135 if (keymap[i].request != request)
2138 for (key = 0; key < ARRAY_SIZE(key_table); key++)
2139 if (key_table[key].value == keymap[i].alias)
2140 seq = key_table[key].name;
2143 keymap[i].alias < 127 &&
2144 isprint(keymap[i].alias)) {
2145 key_char[1] = (char) keymap[i].alias;
2152 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
2153 return "Too many keybindings!";
2160 static void load_help_page(void)
2163 struct view *view = VIEW(REQ_VIEW_HELP);
2164 int lines = ARRAY_SIZE(req_info) + 2;
2167 if (view->lines > 0)
2170 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2171 if (!req_info[i].request)
2174 view->line = calloc(lines, sizeof(*view->line));
2176 report("Allocation failure");
2180 pager_read(view, "Quick reference for tig keybindings:");
2182 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2185 if (!req_info[i].request) {
2186 pager_read(view, "");
2187 pager_read(view, req_info[i].help);
2191 key = get_key(req_info[i].request);
2192 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
2195 pager_read(view, buf);
2201 * Unicode / UTF-8 handling
2203 * NOTE: Much of the following code for dealing with unicode is derived from
2204 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2205 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2208 /* I've (over)annotated a lot of code snippets because I am not entirely
2209 * confident that the approach taken by this small UTF-8 interface is correct.
2213 unicode_width(unsigned long c)
2216 (c <= 0x115f /* Hangul Jamo */
2219 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2221 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2222 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2223 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2224 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2225 || (c >= 0xffe0 && c <= 0xffe6)
2226 || (c >= 0x20000 && c <= 0x2fffd)
2227 || (c >= 0x30000 && c <= 0x3fffd)))
2233 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2234 * Illegal bytes are set one. */
2235 static const unsigned char utf8_bytes[256] = {
2236 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,
2237 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,
2238 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,
2239 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,
2240 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,
2241 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,
2242 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,
2243 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,
2246 /* Decode UTF-8 multi-byte representation into a unicode character. */
2247 static inline unsigned long
2248 utf8_to_unicode(const char *string, size_t length)
2250 unsigned long unicode;
2254 unicode = string[0];
2257 unicode = (string[0] & 0x1f) << 6;
2258 unicode += (string[1] & 0x3f);
2261 unicode = (string[0] & 0x0f) << 12;
2262 unicode += ((string[1] & 0x3f) << 6);
2263 unicode += (string[2] & 0x3f);
2266 unicode = (string[0] & 0x0f) << 18;
2267 unicode += ((string[1] & 0x3f) << 12);
2268 unicode += ((string[2] & 0x3f) << 6);
2269 unicode += (string[3] & 0x3f);
2272 unicode = (string[0] & 0x0f) << 24;
2273 unicode += ((string[1] & 0x3f) << 18);
2274 unicode += ((string[2] & 0x3f) << 12);
2275 unicode += ((string[3] & 0x3f) << 6);
2276 unicode += (string[4] & 0x3f);
2279 unicode = (string[0] & 0x01) << 30;
2280 unicode += ((string[1] & 0x3f) << 24);
2281 unicode += ((string[2] & 0x3f) << 18);
2282 unicode += ((string[3] & 0x3f) << 12);
2283 unicode += ((string[4] & 0x3f) << 6);
2284 unicode += (string[5] & 0x3f);
2287 die("Invalid unicode length");
2290 /* Invalid characters could return the special 0xfffd value but NUL
2291 * should be just as good. */
2292 return unicode > 0xffff ? 0 : unicode;
2295 /* Calculates how much of string can be shown within the given maximum width
2296 * and sets trimmed parameter to non-zero value if all of string could not be
2299 * Additionally, adds to coloffset how many many columns to move to align with
2300 * the expected position. Takes into account how multi-byte and double-width
2301 * characters will effect the cursor position.
2303 * Returns the number of bytes to output from string to satisfy max_width. */
2305 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
2307 const char *start = string;
2308 const char *end = strchr(string, '\0');
2314 while (string < end) {
2315 int c = *(unsigned char *) string;
2316 unsigned char bytes = utf8_bytes[c];
2318 unsigned long unicode;
2320 if (string + bytes > end)
2323 /* Change representation to figure out whether
2324 * it is a single- or double-width character. */
2326 unicode = utf8_to_unicode(string, bytes);
2327 /* FIXME: Graceful handling of invalid unicode character. */
2331 ucwidth = unicode_width(unicode);
2333 if (width > max_width) {
2338 /* The column offset collects the differences between the
2339 * number of bytes encoding a character and the number of
2340 * columns will be used for rendering said character.
2342 * So if some character A is encoded in 2 bytes, but will be
2343 * represented on the screen using only 1 byte this will and up
2344 * adding 1 to the multi-byte column offset.
2346 * Assumes that no double-width character can be encoding in
2347 * less than two bytes. */
2348 if (bytes > ucwidth)
2349 mbwidth += bytes - ucwidth;
2354 *coloffset += mbwidth;
2356 return string - start;
2364 /* Whether or not the curses interface has been initialized. */
2365 static bool cursed = FALSE;
2367 /* The status window is used for polling keystrokes. */
2368 static WINDOW *status_win;
2370 /* Update status and title window. */
2372 report(const char *msg, ...)
2374 static bool empty = TRUE;
2375 struct view *view = display[current_view];
2377 if (!empty || *msg) {
2380 va_start(args, msg);
2383 wmove(status_win, 0, 0);
2385 vwprintw(status_win, msg, args);
2390 wrefresh(status_win);
2395 update_view_title(view);
2396 update_display_cursor();
2399 /* Controls when nodelay should be in effect when polling user input. */
2401 set_nonblocking_input(bool loading)
2403 static unsigned int loading_views;
2405 if ((loading == FALSE && loading_views-- == 1) ||
2406 (loading == TRUE && loading_views++ == 0))
2407 nodelay(status_win, loading);
2415 /* Initialize the curses library */
2416 if (isatty(STDIN_FILENO)) {
2417 cursed = !!initscr();
2419 /* Leave stdin and stdout alone when acting as a pager. */
2420 FILE *io = fopen("/dev/tty", "r+");
2422 cursed = !!newterm(NULL, io, io);
2426 die("Failed to initialize curses");
2428 nonl(); /* Tell curses not to do NL->CR/NL on output */
2429 cbreak(); /* Take input chars one at a time, no wait for \n */
2430 noecho(); /* Don't echo input */
2431 leaveok(stdscr, TRUE);
2436 getmaxyx(stdscr, y, x);
2437 status_win = newwin(1, 0, y - 1, 0);
2439 die("Failed to create status window");
2441 /* Enable keyboard mapping */
2442 keypad(status_win, TRUE);
2443 wbkgdset(status_win, get_line_attr(LINE_STATUS));
2448 * Repository references
2451 static struct ref *refs;
2452 static size_t refs_size;
2454 /* Id <-> ref store */
2455 static struct ref ***id_refs;
2456 static size_t id_refs_size;
2458 static struct ref **
2461 struct ref ***tmp_id_refs;
2462 struct ref **ref_list = NULL;
2463 size_t ref_list_size = 0;
2466 for (i = 0; i < id_refs_size; i++)
2467 if (!strcmp(id, id_refs[i][0]->id))
2470 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
2474 id_refs = tmp_id_refs;
2476 for (i = 0; i < refs_size; i++) {
2479 if (strcmp(id, refs[i].id))
2482 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
2490 if (ref_list_size > 0)
2491 ref_list[ref_list_size - 1]->next = 1;
2492 ref_list[ref_list_size] = &refs[i];
2494 /* XXX: The properties of the commit chains ensures that we can
2495 * safely modify the shared ref. The repo references will
2496 * always be similar for the same id. */
2497 ref_list[ref_list_size]->next = 0;
2502 id_refs[id_refs_size++] = ref_list;
2508 read_ref(char *id, int idlen, char *name, int namelen)
2513 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
2514 /* Commits referenced by tags has "^{}" appended. */
2515 if (name[namelen - 1] != '}')
2518 while (namelen > 0 && name[namelen] != '^')
2522 namelen -= STRING_SIZE("refs/tags/");
2523 name += STRING_SIZE("refs/tags/");
2525 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
2526 namelen -= STRING_SIZE("refs/heads/");
2527 name += STRING_SIZE("refs/heads/");
2529 } else if (!strcmp(name, "HEAD")) {
2533 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
2537 ref = &refs[refs_size++];
2538 ref->name = malloc(namelen + 1);
2542 strncpy(ref->name, name, namelen);
2543 ref->name[namelen] = 0;
2545 string_copy(ref->id, id);
2553 const char *cmd_env = getenv("TIG_LS_REMOTE");
2554 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
2556 return read_properties(popen(cmd, "r"), "\t", read_ref);
2560 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
2562 if (!strcmp(name, "i18n.commitencoding"))
2563 string_copy(opt_encoding, value);
2569 load_repo_config(void)
2571 return read_properties(popen("git repo-config --list", "r"),
2572 "=", read_repo_config_option);
2576 read_properties(FILE *pipe, const char *separators,
2577 int (*read_property)(char *, int, char *, int))
2579 char buffer[BUFSIZ];
2586 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
2591 name = chomp_string(name);
2592 namelen = strcspn(name, separators);
2594 if (name[namelen]) {
2596 value = chomp_string(name + namelen + 1);
2597 valuelen = strlen(value);
2604 state = read_property(name, namelen, value, valuelen);
2607 if (state != ERR && ferror(pipe))
2620 static void __NORETURN
2623 /* XXX: Restore tty modes and let the OS cleanup the rest! */
2629 static void __NORETURN
2630 die(const char *err, ...)
2636 va_start(args, err);
2637 fputs("tig: ", stderr);
2638 vfprintf(stderr, err, args);
2639 fputs("\n", stderr);
2646 main(int argc, char *argv[])
2649 enum request request;
2652 signal(SIGINT, quit);
2654 if (load_options() == ERR)
2655 die("Failed to load user config.");
2657 /* Load the repo config file so options can be overwritten from
2658 * the command line. */
2659 if (load_repo_config() == ERR)
2660 die("Failed to load repo config.");
2662 if (!parse_options(argc, argv))
2665 if (load_refs() == ERR)
2666 die("Failed to load refs.");
2668 /* Require a git repository unless when running in pager mode. */
2669 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
2670 die("Not a git repository");
2672 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
2673 view->cmd_env = getenv(view->cmd_env);
2675 request = opt_request;
2679 while (view_driver(display[current_view], request)) {
2683 foreach_view (view, i)
2686 /* Refresh, accept single keystroke of input */
2687 key = wgetch(status_win);
2688 request = get_request(key);
2690 /* Some low-level request handling. This keeps access to
2691 * status_win restricted. */
2695 /* Temporarily switch to line-oriented and echoed
2700 if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
2701 memcpy(opt_cmd, "git ", 4);
2702 opt_request = REQ_VIEW_PAGER;
2704 report("Prompt interrupted by loading view, "
2705 "press 'z' to stop loading views");
2706 request = REQ_SCREEN_UPDATE;
2713 case REQ_SCREEN_RESIZE:
2717 getmaxyx(stdscr, height, width);
2719 /* Resize the status view and let the view driver take
2720 * care of resizing the displayed views. */
2721 wresize(status_win, 1, width);
2722 mvwin(status_win, height - 1, 0);
2723 wrefresh(status_win);