1 /* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
2 * See license info at the bottom. */
9 * tig - text-mode interface for git
15 * tig [options] [--] [git log options]
16 * tig [options] log [git log options]
17 * tig [options] diff [git diff options]
18 * tig [options] show [git show options]
19 * tig [options] < [git command output]
23 * Browse changes in a git repository. Additionally, tig(1) can also act
24 * as a pager for output of various git commands.
26 * When browsing repositories, tig(1) uses the underlying git commands
27 * to present the user with various views, such as summarized commit log
28 * and showing the commit with the log message, diffstat, and the diff.
30 * Using tig(1) as a pager, it will display input from stdin and try
35 #define VERSION "tig-0.3"
55 static void die(const char *err, ...);
56 static void report(const char *msg, ...);
57 static void set_nonblocking_input(bool loading);
58 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
60 #define ABS(x) ((x) >= 0 ? (x) : -(x))
61 #define MIN(x, y) ((x) < (y) ? (x) : (y))
63 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
64 #define STRING_SIZE(x) (sizeof(x) - 1)
66 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
67 #define SIZEOF_CMD 1024 /* Size of command buffer. */
69 /* This color name can be used to refer to the default term colors. */
70 #define COLOR_DEFAULT (-1)
72 #define TIG_HELP "(d)iff, (l)og, (m)ain, (q)uit, (h)elp"
74 /* The format and size of the date column in the main view. */
75 #define DATE_FORMAT "%Y-%m-%d %H:%M"
76 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
78 #define AUTHOR_COLS 20
80 /* The default interval between line numbers. */
81 #define NUMBER_INTERVAL 1
85 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
87 /* Some ascii-shorthands fitted into the ncurses namespace. */
89 #define KEY_RETURN '\r'
93 /* User action requests. */
95 /* Offset all requests to avoid conflicts with ncurses getch values. */
96 REQ_OFFSET = KEY_MAX + 1,
98 /* XXX: Keep the view request first and in sync with views[]. */
113 REQ_TOGGLE_LINE_NUMBERS,
127 REQ_SCROLL_LINE_DOWN,
129 REQ_SCROLL_PAGE_DOWN,
133 char *name; /* Ref name; tag or head names are shortened. */
134 char id[41]; /* Commit SHA1 ID */
135 unsigned int tag:1; /* Is it a tag? */
136 unsigned int next:1; /* For ref lists: are there more refs? */
139 static struct ref **get_refs(char *id);
147 string_ncopy(char *dst, const char *src, int dstlen)
149 strncpy(dst, src, dstlen - 1);
154 /* Shorthand for safely copying into a fixed buffer. */
155 #define string_copy(dst, src) \
156 string_ncopy(dst, src, sizeof(dst))
161 * NOTE: The following is a slightly modified copy of the git project's shell
162 * quoting routines found in the quote.c file.
164 * Help to copy the thing properly quoted for the shell safety. any single
165 * quote is replaced with '\'', any exclamation point is replaced with '\!',
166 * and the whole thing is enclosed in a
169 * original sq_quote result
170 * name ==> name ==> 'name'
171 * a b ==> a b ==> 'a b'
172 * a'b ==> a'\''b ==> 'a'\''b'
173 * a!b ==> a'\!'b ==> 'a'\!'b'
177 sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
181 #define BUFPUT(x) do { if (bufsize < SIZEOF_CMD) buf[bufsize++] = (x); } while (0)
184 while ((c = *src++)) {
185 if (c == '\'' || c == '!') {
205 static const char usage[] =
206 VERSION " (" __DATE__ ")\n"
208 "Usage: tig [options]\n"
209 " or: tig [options] [--] [git log options]\n"
210 " or: tig [options] log [git log options]\n"
211 " or: tig [options] diff [git diff options]\n"
212 " or: tig [options] show [git show options]\n"
213 " or: tig [options] < [git command output]\n"
216 " -l Start up in log view\n"
217 " -d Start up in diff view\n"
218 " -n[I], --line-number[=I] Show line numbers with given interval\n"
219 " -t[N], --tab-size[=N] Set number of spaces for tab expansion\n"
220 " -- Mark end of tig options\n"
221 " -v, --version Show version and exit\n"
222 " -h, --help Show help message and exit\n";
224 /* Option and state variables. */
225 static bool opt_line_number = FALSE;
226 static int opt_num_interval = NUMBER_INTERVAL;
227 static int opt_tab_size = TABSIZE;
228 static enum request opt_request = REQ_VIEW_MAIN;
229 static char opt_cmd[SIZEOF_CMD] = "";
230 static FILE *opt_pipe = NULL;
232 /* Returns the index of log or diff command or -1 to exit. */
234 parse_options(int argc, char *argv[])
238 for (i = 1; i < argc; i++) {
243 * Start up in log view using the internal log command.
245 if (!strcmp(opt, "-l")) {
246 opt_request = REQ_VIEW_LOG;
252 * Start up in diff view using the internal diff command.
254 if (!strcmp(opt, "-d")) {
255 opt_request = REQ_VIEW_DIFF;
260 * -n[INTERVAL], --line-number[=INTERVAL]::
261 * Prefix line numbers in log and diff view.
262 * Optionally, with interval different than each line.
264 if (!strncmp(opt, "-n", 2) ||
265 !strncmp(opt, "--line-number", 13)) {
271 } else if (opt[STRING_SIZE("--line-number")] == '=') {
272 num = opt + STRING_SIZE("--line-number=");
276 opt_num_interval = atoi(num);
278 opt_line_number = TRUE;
283 * -t[NSPACES], --tab-size[=NSPACES]::
284 * Set the number of spaces tabs should be expanded to.
286 if (!strncmp(opt, "-t", 2) ||
287 !strncmp(opt, "--tab-size", 10)) {
293 } else if (opt[STRING_SIZE("--tab-size")] == '=') {
294 num = opt + STRING_SIZE("--tab-size=");
298 opt_tab_size = MIN(atoi(num), TABSIZE);
304 * Show version and exit.
306 if (!strcmp(opt, "-v") ||
307 !strcmp(opt, "--version")) {
308 printf("tig version %s\n", VERSION);
314 * Show help message and exit.
316 if (!strcmp(opt, "-h") ||
317 !strcmp(opt, "--help")) {
324 * End of tig(1) options. Useful when specifying command
325 * options for the main view. Example:
327 * $ tig -- --since=1.month
329 if (!strcmp(opt, "--")) {
335 * log [git log options]::
336 * Open log view using the given git log options.
338 * diff [git diff options]::
339 * Open diff view using the given git diff options.
341 * show [git show options]::
342 * Open diff view using the given git show options.
344 if (!strcmp(opt, "log") ||
345 !strcmp(opt, "diff") ||
346 !strcmp(opt, "show")) {
347 opt_request = opt[0] == 'l'
348 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
353 * [git log options]::
354 * tig(1) will stop the option parsing when the first
355 * command line parameter not starting with "-" is
356 * encountered. All options including this one will be
357 * passed to git log when loading the main view.
358 * This makes it possible to say:
360 * $ tig tag-1.0..HEAD
362 if (opt[0] && opt[0] != '-')
365 die("unknown command '%s'", opt);
368 if (!isatty(STDIN_FILENO)) {
372 * If stdin is a pipe, any log or diff options will be ignored and the
373 * pager view will be opened loading data from stdin. The pager mode
374 * can be used for colorizing output from various git commands.
376 * Example on how to colorize the output of git-show(1):
380 opt_request = REQ_VIEW_PAGER;
383 } else if (i < argc) {
387 * Git command options
388 * ~~~~~~~~~~~~~~~~~~~
389 * All git command options specified on the command line will
390 * be passed to the given command and all will be shell quoted
391 * before they are passed to the shell.
393 * NOTE: If you specify options for the main view, you should
394 * not use the `--pretty` option as this option will be set
395 * automatically to the format expected by the main view.
397 * Example on how to open the log view and show both author and
398 * committer information:
400 * $ tig log --pretty=fuller
402 * See the <<refspec, "Specifying revisions">> section below
403 * for an introduction to revision options supported by the git
404 * commands. For details on specific git command options, refer
405 * to the man page of the command in question.
408 if (opt_request == REQ_VIEW_MAIN)
409 /* XXX: This is vulnerable to the user overriding
410 * options required for the main view parser. */
411 string_copy(opt_cmd, "git log --stat --pretty=raw");
413 string_copy(opt_cmd, "git");
414 buf_size = strlen(opt_cmd);
416 while (buf_size < sizeof(opt_cmd) && i < argc) {
417 opt_cmd[buf_size++] = ' ';
418 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
421 if (buf_size >= sizeof(opt_cmd))
422 die("command too long");
424 opt_cmd[buf_size] = 0;
433 * Line-oriented content detection.
437 /* Line type String to match Foreground Background Attributes
438 * --------- --------------- ---------- ---------- ---------- */ \
440 LINE(DIFF, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
441 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
442 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
443 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
444 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
445 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
446 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
447 LINE(DIFF_COPY, "copy ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
448 LINE(DIFF_RENAME, "rename ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
449 LINE(DIFF_SIM, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
450 LINE(DIFF_DISSIM, "dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
451 /* Pretty print commit header */ \
452 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
453 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
454 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
455 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
456 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
457 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
458 /* Raw commit header */ \
459 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
460 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
461 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
462 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
463 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
465 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
466 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
468 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
469 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
470 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
471 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
472 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
473 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
474 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
475 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
476 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
477 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
478 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD),
481 #define LINE(type, line, fg, bg, attr) \
488 const char *line; /* The start of line to match. */
489 int linelen; /* Size of string to match. */
490 int fg, bg, attr; /* Color and text attributes for the lines. */
493 static struct line_info line_info[] = {
494 #define LINE(type, line, fg, bg, attr) \
495 { (line), STRING_SIZE(line), (fg), (bg), (attr) }
500 static enum line_type
501 get_line_type(char *line)
503 int linelen = strlen(line);
506 for (type = 0; type < ARRAY_SIZE(line_info); type++)
507 /* Case insensitive search matches Signed-off-by lines better. */
508 if (linelen >= line_info[type].linelen &&
509 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
516 get_line_attr(enum line_type type)
518 assert(type < ARRAY_SIZE(line_info));
519 return COLOR_PAIR(type) | line_info[type].attr;
525 int default_bg = COLOR_BLACK;
526 int default_fg = COLOR_WHITE;
531 if (use_default_colors() != ERR) {
536 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
537 struct line_info *info = &line_info[type];
538 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
539 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
541 init_pair(type, fg, bg);
547 * ENVIRONMENT VARIABLES
548 * ---------------------
549 * Several options related to the interface with git can be configured
550 * via environment options.
552 * Repository references
553 * ~~~~~~~~~~~~~~~~~~~~~
554 * Commits that are referenced by tags and branch heads will be marked
555 * by the reference name surrounded by '[' and ']':
557 * 2006-03-26 19:42 Petr Baudis | [cogito-0.17.1] Cogito 0.17.1
559 * If you want to filter out certain directories under `.git/refs/`, say
560 * `tmp` you can do it by setting the following variable:
562 * $ TIG_LS_REMOTE="git ls-remote . | sed /\/tmp\//d" tig
564 * Or set the variable permanently in your environment.
567 * Set command for retrieving all repository references. The command
568 * should output data in the same format as git-ls-remote(1).
571 #define TIG_LS_REMOTE \
572 "git ls-remote . 2>/dev/null"
578 * It is possible to alter which commands are used for the different views.
579 * If for example you prefer commits in the main view to be sorted by date
580 * and only show 500 commits, use:
582 * $ TIG_MAIN_CMD="git log --date-order -n500 --pretty=raw %s" tig
584 * Or set the variable permanently in your environment.
586 * Notice, how `%s` is used to specify the commit reference. There can
587 * be a maximum of 5 `%s` ref specifications.
590 * The command used for the diff view. By default, git show is used
594 * The command used for the log view. If you prefer to have both
595 * author and committer shown in the log view be sure to pass
596 * `--pretty=fuller` to git log.
599 * The command used for the main view. Note, you must always specify
600 * the option: `--pretty=raw` since the main view parser expects to
604 #define TIG_DIFF_CMD \
605 "git show --patch-with-stat --find-copies-harder -B -C %s"
607 #define TIG_LOG_CMD \
608 "git log --cc --stat -n100 %s"
610 #define TIG_MAIN_CMD \
611 "git log --topo-order --stat --pretty=raw %s"
613 /* ... silently ignore that the following are also exported. */
615 #define TIG_HELP_CMD \
616 "man tig 2>/dev/null"
618 #define TIG_PAGER_CMD \
625 * The display consists of a status window on the last line of the screen and
626 * one or more views. The default is to only show one view at the time but it
627 * is possible to split both the main and log view to also show the commit
630 * If you are in the log view and press 'Enter' when the current line is a
631 * commit line, such as:
633 * commit 4d55caff4cc89335192f3e566004b4ceef572521
635 * You will split the view so that the log view is displayed in the top window
636 * and the diff view in the bottom window. You can switch between the two
637 * views by pressing 'Tab'. To maximize the log view again, simply press 'l'.
642 /* The display array of active views and the index of the current view. */
643 static struct view *display[2];
644 static unsigned int current_view;
646 #define foreach_view(view, i) \
647 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
651 * Current head and commit ID
652 * ~~~~~~~~~~~~~~~~~~~~~~~~~~
653 * The viewer keeps track of both what head and commit ID you are currently
654 * viewing. The commit ID will follow the cursor line and change everytime time
655 * you highlight a different commit. Whenever you reopen the diff view it
656 * will be reloaded, if the commit ID changed.
658 * The head ID is used when opening the main and log view to indicate from
659 * what revision to show history.
662 static char ref_commit[SIZEOF_REF] = "HEAD";
663 static char ref_head[SIZEOF_REF] = "HEAD";
667 const char *name; /* View name */
668 const char *cmd_fmt; /* Default command line format */
669 const char *cmd_env; /* Command line set via environment */
670 const char *id; /* Points to either of ref_{head,commit} */
673 /* What type of content being displayed. Used in the
676 /* Draw one line; @lineno must be < view->height. */
677 bool (*draw)(struct view *view, unsigned int lineno);
678 /* Read one line; updates view->line. */
679 bool (*read)(struct view *view, char *line);
680 /* Depending on view, change display based on current line. */
681 bool (*enter)(struct view *view);
684 char cmd[SIZEOF_CMD]; /* Command buffer */
685 char ref[SIZEOF_REF]; /* Hovered commit reference */
686 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
688 int height, width; /* The width and height of the main window */
689 WINDOW *win; /* The main window */
690 WINDOW *title; /* The title window living below the main window */
693 unsigned long offset; /* Offset of the window top */
694 unsigned long lineno; /* Current line number */
696 /* If non-NULL, points to the view that opened this view. If this view
697 * is closed tig will switch back to the parent view. */
701 unsigned long lines; /* Total number of lines */
702 void **line; /* Line index; each line contains user data */
703 unsigned int digits; /* Number of digits in the lines member. */
710 static struct view_ops pager_ops;
711 static struct view_ops main_ops;
713 #define VIEW_STR(name, cmd, env, ref, ops) \
714 { name, cmd, #env, ref, ops }
716 #define VIEW_(id, name, ops, ref) \
717 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops)
722 * tig(1) presents various 'views' of a repository. Each view is based on output
723 * from an external command, most often 'git log', 'git diff', or 'git show'.
726 * Is the default view, and it shows a one line summary of each commit
727 * in the chosen list of revisions. The summary includes commit date,
728 * author, and the first line of the log message. Additionally, any
729 * repository references, such as tags, will be shown.
732 * Presents a more rich view of the revision log showing the whole log
733 * message and the diffstat.
736 * Shows either the diff of the current working tree, that is, what
737 * has changed since the last commit, or the commit diff complete
738 * with log message, diffstat and diff.
741 * Is used for displaying both input from stdin and output from git
742 * commands entered in the internal prompt.
745 * Displays the information from the tig(1) man page. For the help view
746 * to work you need to have the tig(1) man page installed.
749 static struct view views[] = {
750 VIEW_(MAIN, "main", &main_ops, ref_head),
751 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
752 VIEW_(LOG, "log", &pager_ops, ref_head),
753 VIEW_(HELP, "help", &pager_ops, "static"),
754 VIEW_(PAGER, "pager", &pager_ops, "static"),
757 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
761 redraw_view_from(struct view *view, int lineno)
763 assert(0 <= lineno && lineno < view->height);
765 for (; lineno < view->height; lineno++) {
766 if (!view->ops->draw(view, lineno))
770 redrawwin(view->win);
775 redraw_view(struct view *view)
778 redraw_view_from(view, 0);
785 * Each view has a title window which shows the name of the view, current
786 * commit ID if available, and where the view is positioned:
788 * [main] c622eefaa485995320bc743431bae0d497b1d875 - commit 1 of 61 (1%)
790 * By default, the title of the current view is highlighted using bold font.
794 update_view_title(struct view *view)
796 if (view == display[current_view])
797 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
799 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
802 wmove(view->title, 0, 0);
805 wprintw(view->title, "[%s] %s", view->name, view->ref);
807 wprintw(view->title, "[%s]", view->name);
810 wprintw(view->title, " - %s %d of %d (%d%%)",
814 (view->lineno + 1) * 100 / view->lines);
817 wrefresh(view->title);
824 struct view *base = display[0];
825 struct view *view = display[1] ? display[1] : display[0];
827 /* Setup window dimensions */
829 getmaxyx(stdscr, base->height, base->width);
831 /* Make room for the status window. */
835 /* Horizontal split. */
836 view->width = base->width;
837 view->height = SCALE_SPLIT_VIEW(base->height);
838 base->height -= view->height;
840 /* Make room for the title bar. */
844 /* Make room for the title bar. */
849 foreach_view (view, i) {
850 /* Keep the height of all view->win windows one larger than is
851 * required so that the cursor can wrap-around on the last line
852 * without scrolling the window. */
854 view->win = newwin(view->height + 1, 0, offset, 0);
856 die("Failed to create %s view", view->name);
858 scrollok(view->win, TRUE);
860 view->title = newwin(1, 0, offset + view->height, 0);
862 die("Failed to create title window");
865 wresize(view->win, view->height + 1, view->width);
866 mvwin(view->win, offset, 0);
867 mvwin(view->title, offset + view->height, 0);
871 offset += view->height + 1;
881 foreach_view (view, i) {
883 update_view_title(view);
892 /* Scrolling backend */
894 do_scroll_view(struct view *view, int lines, bool redraw)
896 /* The rendering expects the new offset. */
897 view->offset += lines;
899 assert(0 <= view->offset && view->offset < view->lines);
902 /* Redraw the whole screen if scrolling is pointless. */
903 if (view->height < ABS(lines)) {
907 int line = lines > 0 ? view->height - lines : 0;
908 int end = line + ABS(lines);
910 wscrl(view->win, lines);
912 for (; line < end; line++) {
913 if (!view->ops->draw(view, line))
918 /* Move current line into the view. */
919 if (view->lineno < view->offset) {
920 view->lineno = view->offset;
921 view->ops->draw(view, 0);
923 } else if (view->lineno >= view->offset + view->height) {
924 if (view->lineno == view->offset + view->height) {
925 /* Clear the hidden line so it doesn't show if the view
927 wmove(view->win, view->height, 0);
928 wclrtoeol(view->win);
930 view->lineno = view->offset + view->height - 1;
931 view->ops->draw(view, view->lineno - view->offset);
934 assert(view->offset <= view->lineno && view->lineno < view->lines);
939 redrawwin(view->win);
944 /* Scroll frontend */
946 scroll_view(struct view *view, enum request request)
951 case REQ_SCROLL_PAGE_DOWN:
952 lines = view->height;
953 case REQ_SCROLL_LINE_DOWN:
954 if (view->offset + lines > view->lines)
955 lines = view->lines - view->offset;
957 if (lines == 0 || view->offset + view->height >= view->lines) {
958 report("Cannot scroll beyond the last line");
963 case REQ_SCROLL_PAGE_UP:
964 lines = view->height;
965 case REQ_SCROLL_LINE_UP:
966 if (lines > view->offset)
967 lines = view->offset;
970 report("Cannot scroll beyond the first line");
978 die("request %d not handled in switch", request);
981 do_scroll_view(view, lines, TRUE);
986 move_view(struct view *view, enum request request, bool redraw)
991 case REQ_MOVE_FIRST_LINE:
992 steps = -view->lineno;
995 case REQ_MOVE_LAST_LINE:
996 steps = view->lines - view->lineno - 1;
999 case REQ_MOVE_PAGE_UP:
1000 steps = view->height > view->lineno
1001 ? -view->lineno : -view->height;
1004 case REQ_MOVE_PAGE_DOWN:
1005 steps = view->lineno + view->height >= view->lines
1006 ? view->lines - view->lineno - 1 : view->height;
1018 die("request %d not handled in switch", request);
1021 if (steps <= 0 && view->lineno == 0) {
1022 report("Cannot move beyond the first line");
1025 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1026 report("Cannot move beyond the last line");
1030 /* Move the current line */
1031 view->lineno += steps;
1032 assert(0 <= view->lineno && view->lineno < view->lines);
1034 /* Repaint the old "current" line if we be scrolling */
1035 if (ABS(steps) < view->height) {
1036 int prev_lineno = view->lineno - steps - view->offset;
1038 wmove(view->win, prev_lineno, 0);
1039 wclrtoeol(view->win);
1040 view->ops->draw(view, prev_lineno);
1043 /* Check whether the view needs to be scrolled */
1044 if (view->lineno < view->offset ||
1045 view->lineno >= view->offset + view->height) {
1046 if (steps < 0 && -steps > view->offset) {
1047 steps = -view->offset;
1049 } else if (steps > 0) {
1050 if (view->lineno == view->lines - 1 &&
1051 view->lines > view->height) {
1052 steps = view->lines - view->offset - 1;
1053 if (steps >= view->height)
1054 steps -= view->height - 1;
1058 do_scroll_view(view, steps, redraw);
1062 /* Draw the current line */
1063 view->ops->draw(view, view->lineno - view->offset);
1068 redrawwin(view->win);
1069 wrefresh(view->win);
1075 * Incremental updating
1079 end_update(struct view *view)
1083 set_nonblocking_input(FALSE);
1084 if (view->pipe == stdin)
1092 begin_update(struct view *view)
1094 const char *id = view->id;
1100 string_copy(view->cmd, opt_cmd);
1102 /* When running random commands, the view ref could have become
1103 * invalid so clear it. */
1106 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1108 if (snprintf(view->cmd, sizeof(view->cmd), format,
1109 id, id, id, id, id) >= sizeof(view->cmd))
1113 /* Special case for the pager view. */
1115 view->pipe = opt_pipe;
1118 view->pipe = popen(view->cmd, "r");
1124 set_nonblocking_input(TRUE);
1129 string_copy(view->vid, id);
1134 for (i = 0; i < view->lines; i++)
1136 free(view->line[i]);
1142 view->start_time = time(NULL);
1148 update_view(struct view *view)
1150 char buffer[BUFSIZ];
1153 /* The number of lines to read. If too low it will cause too much
1154 * redrawing (and possible flickering), if too high responsiveness
1156 unsigned long lines = view->height;
1157 int redraw_from = -1;
1162 /* Only redraw if lines are visible. */
1163 if (view->offset + view->height >= view->lines)
1164 redraw_from = view->lines - view->offset;
1166 tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines));
1172 while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
1173 int linelen = strlen(line);
1176 line[linelen - 1] = 0;
1178 if (!view->ops->read(view, line))
1188 lines = view->lines;
1189 for (digits = 0; lines; digits++)
1192 /* Keep the displayed view in sync with line number scaling. */
1193 if (digits != view->digits) {
1194 view->digits = digits;
1199 if (redraw_from >= 0) {
1200 /* If this is an incremental update, redraw the previous line
1201 * since for commits some members could have changed when
1202 * loading the main view. */
1203 if (redraw_from > 0)
1206 /* Incrementally draw avoids flickering. */
1207 redraw_view_from(view, redraw_from);
1210 /* Update the title _after_ the redraw so that if the redraw picks up a
1211 * commit reference in view->ref it'll be available here. */
1212 update_view_title(view);
1214 if (ferror(view->pipe)) {
1215 report("Failed to read: %s", strerror(errno));
1218 } else if (feof(view->pipe)) {
1219 time_t secs = time(NULL) - view->start_time;
1221 if (view == VIEW(REQ_VIEW_HELP)) {
1222 const char *msg = TIG_HELP;
1224 if (view->lines == 0) {
1225 /* Slightly ugly, but abusing view->ref keeps
1226 * the error message. */
1227 string_copy(view->ref, "No help available");
1228 msg = "The tig(1) manpage is not installed";
1235 report("Loaded %d lines in %ld second%s", view->lines, secs,
1236 secs == 1 ? "" : "s");
1243 report("Allocation failure");
1251 OPEN_DEFAULT = 0, /* Use default view switching. */
1252 OPEN_SPLIT = 1, /* Split current view. */
1253 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1254 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1258 open_view(struct view *prev, enum request request, enum open_flags flags)
1260 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1261 bool split = !!(flags & OPEN_SPLIT);
1262 bool reload = !!(flags & OPEN_RELOAD);
1263 struct view *view = VIEW(request);
1264 int nviews = display[1] ? 2 : 1;
1266 if (view == prev && nviews == 1 && !reload) {
1267 report("Already in %s view", view->name);
1271 if ((reload || strcmp(view->vid, view->id)) &&
1272 !begin_update(view)) {
1273 report("Failed to load %s view", view->name);
1278 display[current_view + 1] = view;
1282 /* Maximize the current view. */
1283 memset(display, 0, sizeof(display));
1285 display[current_view] = view;
1290 if (split && prev->lineno - prev->offset >= prev->height) {
1291 /* Take the title line into account. */
1292 int lines = prev->lineno - prev->offset - prev->height + 1;
1294 /* Scroll the view that was split if the current line is
1295 * outside the new limited view. */
1296 do_scroll_view(prev, lines, TRUE);
1299 if (prev && view != prev) {
1300 /* "Blur" the previous view. */
1302 update_view_title(prev);
1304 /* Continue loading split views in the background. */
1307 view->parent = prev;
1311 /* Clear the old view and let the incremental updating refill
1314 report("Loading...");
1317 if (view == VIEW(REQ_VIEW_HELP))
1318 report("%s", TIG_HELP);
1323 /* If the view is backgrounded the above calls to report()
1324 * won't redraw the view title. */
1326 update_view_title(view);
1331 * User request switch noodle
1335 view_driver(struct view *view, enum request request)
1342 case REQ_MOVE_PAGE_UP:
1343 case REQ_MOVE_PAGE_DOWN:
1344 case REQ_MOVE_FIRST_LINE:
1345 case REQ_MOVE_LAST_LINE:
1346 move_view(view, request, TRUE);
1349 case REQ_SCROLL_LINE_DOWN:
1350 case REQ_SCROLL_LINE_UP:
1351 case REQ_SCROLL_PAGE_DOWN:
1352 case REQ_SCROLL_PAGE_UP:
1353 scroll_view(view, request);
1360 case REQ_VIEW_PAGER:
1361 open_view(view, request, OPEN_DEFAULT);
1366 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
1368 if (view == VIEW(REQ_VIEW_DIFF) &&
1369 view->parent == VIEW(REQ_VIEW_MAIN)) {
1370 bool redraw = display[0] == VIEW(REQ_VIEW_MAIN);
1372 view = view->parent;
1373 move_view(view, request, redraw);
1374 update_view_title(view);
1376 move_view(view, request, TRUE);
1383 report("Nothing to enter");
1386 return view->ops->enter(view);
1390 int nviews = display[1] ? 2 : 1;
1391 int next_view = (current_view + 1) % nviews;
1393 if (next_view == current_view) {
1394 report("Only one view is displayed");
1398 current_view = next_view;
1399 /* Blur out the title of the previous view. */
1400 update_view_title(view);
1404 case REQ_TOGGLE_LINE_NUMBERS:
1405 opt_line_number = !opt_line_number;
1410 /* Always reload^Wrerun commands from the prompt. */
1411 open_view(view, opt_request, OPEN_RELOAD);
1414 case REQ_STOP_LOADING:
1415 foreach_view (view, i) {
1417 report("Stopped loaded the %s view", view->name),
1422 case REQ_SHOW_VERSION:
1423 report("%s (built %s)", VERSION, __DATE__);
1426 case REQ_SCREEN_RESIZE:
1429 case REQ_SCREEN_REDRAW:
1433 case REQ_SCREEN_UPDATE:
1437 case REQ_VIEW_CLOSE:
1439 memset(display, 0, sizeof(display));
1441 display[current_view] = view->parent;
1442 view->parent = NULL;
1452 /* An unknown key will show most commonly used commands. */
1453 report("Unknown key, press 'h' for help");
1466 pager_draw(struct view *view, unsigned int lineno)
1468 enum line_type type;
1473 if (view->offset + lineno >= view->lines)
1476 line = view->line[view->offset + lineno];
1477 type = get_line_type(line);
1479 wmove(view->win, lineno, 0);
1481 if (view->offset + lineno == view->lineno) {
1482 if (type == LINE_COMMIT) {
1483 string_copy(view->ref, line + 7);
1484 string_copy(ref_commit, view->ref);
1488 wchgat(view->win, -1, 0, type, NULL);
1491 attr = get_line_attr(type);
1492 wattrset(view->win, attr);
1494 linelen = strlen(line);
1496 if (opt_line_number || opt_tab_size < TABSIZE) {
1497 static char spaces[] = " ";
1498 int col_offset = 0, col = 0;
1500 if (opt_line_number) {
1501 unsigned long real_lineno = view->offset + lineno + 1;
1503 if (real_lineno == 1 ||
1504 (real_lineno % opt_num_interval) == 0) {
1505 wprintw(view->win, "%.*d", view->digits, real_lineno);
1508 waddnstr(view->win, spaces,
1509 MIN(view->digits, STRING_SIZE(spaces)));
1511 waddstr(view->win, ": ");
1512 col_offset = view->digits + 2;
1515 while (line && col_offset + col < view->width) {
1516 int cols_max = view->width - col_offset - col;
1520 if (*line == '\t') {
1521 assert(sizeof(spaces) > TABSIZE);
1524 cols = opt_tab_size - (col % opt_tab_size);
1527 line = strchr(line, '\t');
1528 cols = line ? line - text : strlen(text);
1531 waddnstr(view->win, text, MIN(cols, cols_max));
1536 int col = 0, pos = 0;
1538 for (; pos < linelen && col < view->width; pos++, col++)
1539 if (line[pos] == '\t')
1540 col += TABSIZE - (col % TABSIZE) - 1;
1542 waddnstr(view->win, line, pos);
1549 pager_read(struct view *view, char *line)
1551 /* Compress empty lines in the help view. */
1552 if (view == VIEW(REQ_VIEW_HELP) &&
1555 !*((char *) view->line[view->lines - 1]))
1558 view->line[view->lines] = strdup(line);
1559 if (!view->line[view->lines])
1567 pager_enter(struct view *view)
1569 char *line = view->line[view->lineno];
1572 if ((view == VIEW(REQ_VIEW_LOG) ||
1573 view == VIEW(REQ_VIEW_PAGER)) &&
1574 get_line_type(line) == LINE_COMMIT) {
1575 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
1579 /* Always scroll the view even if it was split. That way
1580 * you can use Enter to scroll through the log view and
1581 * split open each commit diff. */
1582 scroll_view(view, REQ_SCROLL_LINE_DOWN);
1584 /* FIXME: A minor workaround. Scrolling the view will call report("")
1585 * but if we are scolling a non-current view this won't properly update
1586 * the view title. */
1588 update_view_title(view);
1593 static struct view_ops pager_ops = {
1606 char id[41]; /* SHA1 ID. */
1607 char title[75]; /* The first line of the commit message. */
1608 char author[75]; /* The author of the commit. */
1609 struct tm time; /* Date from the author ident. */
1610 struct ref **refs; /* Repository references; tags & branch heads. */
1614 main_draw(struct view *view, unsigned int lineno)
1616 char buf[DATE_COLS + 1];
1617 struct commit *commit;
1618 enum line_type type;
1624 if (view->offset + lineno >= view->lines)
1627 commit = view->line[view->offset + lineno];
1628 if (!*commit->author)
1631 wmove(view->win, lineno, col);
1633 if (view->offset + lineno == view->lineno) {
1634 string_copy(view->ref, commit->id);
1635 string_copy(ref_commit, view->ref);
1637 wattrset(view->win, get_line_attr(type));
1638 wchgat(view->win, -1, 0, type, NULL);
1641 type = LINE_MAIN_COMMIT;
1642 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
1645 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
1646 waddnstr(view->win, buf, timelen);
1647 waddstr(view->win, " ");
1650 wmove(view->win, lineno, col);
1651 if (type != LINE_CURSOR)
1652 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
1654 /* FIXME: Make this optional, and add i18n.commitEncoding support. */
1655 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
1658 waddnstr(view->win, commit->author, authorlen);
1659 if (type != LINE_CURSOR)
1660 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
1661 waddch(view->win, '~');
1663 waddstr(view->win, commit->author);
1667 if (type != LINE_CURSOR)
1668 wattrset(view->win, A_NORMAL);
1670 mvwaddch(view->win, lineno, col, ACS_LTEE);
1671 wmove(view->win, lineno, col + 2);
1678 if (type == LINE_CURSOR)
1680 else if (commit->refs[i]->tag)
1681 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
1683 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
1684 waddstr(view->win, "[");
1685 waddstr(view->win, commit->refs[i]->name);
1686 waddstr(view->win, "]");
1687 if (type != LINE_CURSOR)
1688 wattrset(view->win, A_NORMAL);
1689 waddstr(view->win, " ");
1690 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
1691 } while (commit->refs[i++]->next);
1694 if (type != LINE_CURSOR)
1695 wattrset(view->win, get_line_attr(type));
1698 int titlelen = strlen(commit->title);
1700 if (col + titlelen > view->width)
1701 titlelen = view->width - col;
1703 waddnstr(view->win, commit->title, titlelen);
1709 /* Reads git log --pretty=raw output and parses it into the commit struct. */
1711 main_read(struct view *view, char *line)
1713 enum line_type type = get_line_type(line);
1714 struct commit *commit;
1718 commit = calloc(1, sizeof(struct commit));
1722 line += STRING_SIZE("commit ");
1724 view->line[view->lines++] = commit;
1725 string_copy(commit->id, line);
1726 commit->refs = get_refs(commit->id);
1731 char *ident = line + STRING_SIZE("author ");
1732 char *end = strchr(ident, '<');
1735 for (; end > ident && isspace(end[-1]); end--) ;
1739 commit = view->line[view->lines - 1];
1740 string_copy(commit->author, ident);
1742 /* Parse epoch and timezone */
1744 char *secs = strchr(end + 1, '>');
1748 if (!secs || secs[1] != ' ')
1752 time = (time_t) atol(secs);
1753 zone = strchr(secs, ' ');
1754 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
1758 tz = ('0' - zone[1]) * 60 * 60 * 10;
1759 tz += ('0' - zone[2]) * 60 * 60;
1760 tz += ('0' - zone[3]) * 60;
1761 tz += ('0' - zone[4]) * 60;
1768 gmtime_r(&time, &commit->time);
1773 /* We should only ever end up here if there has already been a
1774 * commit line, however, be safe. */
1775 if (view->lines == 0)
1778 /* Fill in the commit title if it has not already been set. */
1779 commit = view->line[view->lines - 1];
1780 if (commit->title[0])
1783 /* Require titles to start with a non-space character at the
1784 * offset used by git log. */
1785 /* FIXME: More gracefull handling of titles; append "..." to
1786 * shortened titles, etc. */
1787 if (strncmp(line, " ", 4) ||
1791 string_copy(commit->title, line + 4);
1798 main_enter(struct view *view)
1800 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
1802 open_view(view, REQ_VIEW_DIFF, flags);
1806 static struct view_ops main_ops = {
1817 * Below the default key bindings are shown.
1825 static struct keymap keymap[] = {
1830 * Switch to main view.
1832 * Switch to diff view.
1834 * Switch to log view.
1836 * Switch to pager view.
1840 { 'm', REQ_VIEW_MAIN },
1841 { 'd', REQ_VIEW_DIFF },
1842 { 'l', REQ_VIEW_LOG },
1843 { 'p', REQ_VIEW_PAGER },
1844 { 'h', REQ_VIEW_HELP },
1850 * Close view, if multiple views are open it will jump back to the
1851 * previous view in the view stack. If it is the last open view it
1852 * will quit. Use 'Q' to quit all views at once.
1854 * This key is "context sensitive" depending on what view you are
1855 * currently in. When in log view on a commit line or in the main
1856 * view, split the view and show the commit diff. In the diff view
1857 * pressing Enter will simply scroll the view one line down.
1859 * Switch to next view.
1861 * This key is "context sensitive" and will move the cursor one
1862 * line up. However, uf you opened a diff view from the main view
1863 * (split- or full-screen) it will change the cursor to point to
1864 * the previous commit in the main view and update the diff view
1867 * Similar to 'Up' but will move down.
1869 { 'q', REQ_VIEW_CLOSE },
1870 { KEY_TAB, REQ_VIEW_NEXT },
1871 { KEY_RETURN, REQ_ENTER },
1872 { KEY_UP, REQ_PREVIOUS },
1873 { KEY_DOWN, REQ_NEXT },
1879 * Move cursor one line up.
1881 * Move cursor one line down.
1885 * Move cursor one page up.
1888 * Move cursor one page down.
1890 * Jump to first line.
1892 * Jump to last line.
1894 { 'k', REQ_MOVE_UP },
1895 { 'j', REQ_MOVE_DOWN },
1896 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1897 { KEY_END, REQ_MOVE_LAST_LINE },
1898 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1899 { ' ', REQ_MOVE_PAGE_DOWN },
1900 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1901 { 'b', REQ_MOVE_PAGE_UP },
1902 { '-', REQ_MOVE_PAGE_UP },
1908 * Scroll view one line up.
1910 * Scroll view one line down.
1912 * Scroll view one page up.
1914 * Scroll view one page down.
1916 { KEY_IC, REQ_SCROLL_LINE_UP },
1917 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1918 { 'w', REQ_SCROLL_PAGE_UP },
1919 { 's', REQ_SCROLL_PAGE_DOWN },
1929 * Stop all background loading. This can be useful if you use
1930 * tig(1) in a repository with a long history without limiting
1935 * Toggle line numbers on/off.
1937 * Open prompt. This allows you to specify what git command
1943 { 'z', REQ_STOP_LOADING },
1944 { 'v', REQ_SHOW_VERSION },
1945 { 'r', REQ_SCREEN_REDRAW },
1946 { 'n', REQ_TOGGLE_LINE_NUMBERS },
1947 { ':', REQ_PROMPT },
1949 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
1950 { ERR, REQ_SCREEN_UPDATE },
1952 /* Use the ncurses SIGWINCH handler. */
1953 { KEY_RESIZE, REQ_SCREEN_RESIZE },
1957 get_request(int key)
1961 for (i = 0; i < ARRAY_SIZE(keymap); i++)
1962 if (keymap[i].alias == key)
1963 return keymap[i].request;
1965 return (enum request) key;
1970 * Unicode / UTF-8 handling
1972 * NOTE: Much of the following code for dealing with unicode is derived from
1973 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
1974 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
1977 /* I've (over)annotated a lot of code snippets because I am not entirely
1978 * confident that the approach taken by this small UTF-8 interface is correct.
1982 unicode_width(unsigned long c)
1985 (c <= 0x115f /* Hangul Jamo */
1988 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
1990 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
1991 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
1992 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
1993 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
1994 || (c >= 0xffe0 && c <= 0xffe6)
1995 || (c >= 0x20000 && c <= 0x2fffd)
1996 || (c >= 0x30000 && c <= 0x3fffd)))
2002 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2003 * Illegal bytes are set one. */
2004 static const unsigned char utf8_bytes[256] = {
2005 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,
2006 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,
2007 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,
2008 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,
2009 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,
2010 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,
2011 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,
2012 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,
2015 /* Decode UTF-8 multi-byte representation into a unicode character. */
2016 static inline unsigned long
2017 utf8_to_unicode(const char *string, size_t length)
2019 unsigned long unicode;
2023 unicode = string[0];
2026 unicode = (string[0] & 0x1f) << 6;
2027 unicode += (string[1] & 0x3f);
2030 unicode = (string[0] & 0x0f) << 12;
2031 unicode += ((string[1] & 0x3f) << 6);
2032 unicode += (string[2] & 0x3f);
2035 unicode = (string[0] & 0x0f) << 18;
2036 unicode += ((string[1] & 0x3f) << 12);
2037 unicode += ((string[2] & 0x3f) << 6);
2038 unicode += (string[3] & 0x3f);
2041 unicode = (string[0] & 0x0f) << 24;
2042 unicode += ((string[1] & 0x3f) << 18);
2043 unicode += ((string[2] & 0x3f) << 12);
2044 unicode += ((string[3] & 0x3f) << 6);
2045 unicode += (string[4] & 0x3f);
2048 unicode = (string[0] & 0x01) << 30;
2049 unicode += ((string[1] & 0x3f) << 24);
2050 unicode += ((string[2] & 0x3f) << 18);
2051 unicode += ((string[3] & 0x3f) << 12);
2052 unicode += ((string[4] & 0x3f) << 6);
2053 unicode += (string[5] & 0x3f);
2056 die("Invalid unicode length");
2059 /* Invalid characters could return the special 0xfffd value but NUL
2060 * should be just as good. */
2061 return unicode > 0xffff ? 0 : unicode;
2064 /* Calculates how much of string can be shown within the given maximum width
2065 * and sets trimmed parameter to non-zero value if all of string could not be
2068 * Additionally, adds to coloffset how many many columns to move to align with
2069 * the expected position. Takes into account how multi-byte and double-width
2070 * characters will effect the cursor position.
2072 * Returns the number of bytes to output from string to satisfy max_width. */
2074 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
2076 const char *start = string;
2077 const char *end = strchr(string, '\0');
2083 while (string < end) {
2084 int c = *(unsigned char *) string;
2085 unsigned char bytes = utf8_bytes[c];
2087 unsigned long unicode;
2089 if (string + bytes > end)
2092 /* Change representation to figure out whether
2093 * it is a single- or double-width character. */
2095 unicode = utf8_to_unicode(string, bytes);
2096 /* FIXME: Graceful handling of invalid unicode character. */
2100 ucwidth = unicode_width(unicode);
2102 if (width > max_width) {
2107 /* The column offset collects the differences between the
2108 * number of bytes encoding a character and the number of
2109 * columns will be used for rendering said character.
2111 * So if some character A is encoded in 2 bytes, but will be
2112 * represented on the screen using only 1 byte this will and up
2113 * adding 1 to the multi-byte column offset.
2115 * Assumes that no double-width character can be encoding in
2116 * less than two bytes. */
2117 if (bytes > ucwidth)
2118 mbwidth += bytes - ucwidth;
2123 *coloffset += mbwidth;
2125 return string - start;
2133 /* Whether or not the curses interface has been initialized. */
2134 static bool cursed = FALSE;
2136 /* The status window is used for polling keystrokes. */
2137 static WINDOW *status_win;
2139 /* Update status and title window. */
2141 report(const char *msg, ...)
2143 static bool empty = TRUE;
2144 struct view *view = display[current_view];
2146 if (!empty || *msg) {
2149 va_start(args, msg);
2152 wmove(status_win, 0, 0);
2154 vwprintw(status_win, msg, args);
2159 wrefresh(status_win);
2164 update_view_title(view);
2166 /* Move the cursor to the right-most column of the cursor line.
2168 * XXX: This could turn out to be a bit expensive, but it ensures that
2169 * the cursor does not jump around. */
2171 wmove(view->win, view->lineno - view->offset, view->width - 1);
2172 wrefresh(view->win);
2176 /* Controls when nodelay should be in effect when polling user input. */
2178 set_nonblocking_input(bool loading)
2180 static unsigned int loading_views;
2182 if ((loading == FALSE && loading_views-- == 1) ||
2183 (loading == TRUE && loading_views++ == 0))
2184 nodelay(status_win, loading);
2192 /* Initialize the curses library */
2193 if (isatty(STDIN_FILENO)) {
2194 cursed = !!initscr();
2196 /* Leave stdin and stdout alone when acting as a pager. */
2197 FILE *io = fopen("/dev/tty", "r+");
2199 cursed = !!newterm(NULL, io, io);
2203 die("Failed to initialize curses");
2205 nonl(); /* Tell curses not to do NL->CR/NL on output */
2206 cbreak(); /* Take input chars one at a time, no wait for \n */
2207 noecho(); /* Don't echo input */
2208 leaveok(stdscr, TRUE);
2213 getmaxyx(stdscr, y, x);
2214 status_win = newwin(1, 0, y - 1, 0);
2216 die("Failed to create status window");
2218 /* Enable keyboard mapping */
2219 keypad(status_win, TRUE);
2220 wbkgdset(status_win, get_line_attr(LINE_STATUS));
2225 * Repository references
2228 static struct ref *refs;
2229 static size_t refs_size;
2231 /* Id <-> ref store */
2232 static struct ref ***id_refs;
2233 static size_t id_refs_size;
2235 static struct ref **
2238 struct ref ***tmp_id_refs;
2239 struct ref **ref_list = NULL;
2240 size_t ref_list_size = 0;
2243 for (i = 0; i < id_refs_size; i++)
2244 if (!strcmp(id, id_refs[i][0]->id))
2247 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
2251 id_refs = tmp_id_refs;
2253 for (i = 0; i < refs_size; i++) {
2256 if (strcmp(id, refs[i].id))
2259 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
2267 if (ref_list_size > 0)
2268 ref_list[ref_list_size - 1]->next = 1;
2269 ref_list[ref_list_size] = &refs[i];
2271 /* XXX: The properties of the commit chains ensures that we can
2272 * safely modify the shared ref. The repo references will
2273 * always be similar for the same id. */
2274 ref_list[ref_list_size]->next = 0;
2279 id_refs[id_refs_size++] = ref_list;
2287 const char *cmd_env = getenv("TIG_LS_REMOTE");
2288 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
2289 FILE *pipe = popen(cmd, "r");
2290 char buffer[BUFSIZ];
2296 while ((line = fgets(buffer, sizeof(buffer), pipe))) {
2297 char *name = strchr(line, '\t');
2301 bool tag_commit = FALSE;
2307 namelen = strlen(name) - 1;
2309 /* Commits referenced by tags has "^{}" appended. */
2310 if (name[namelen - 1] == '}') {
2311 while (namelen > 0 && name[namelen] != '^')
2318 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
2321 name += STRING_SIZE("refs/tags/");
2324 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
2325 name += STRING_SIZE("refs/heads/");
2327 } else if (!strcmp(name, "HEAD")) {
2331 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
2335 ref = &refs[refs_size++];
2337 ref->name = strdup(name);
2341 string_copy(ref->id, line);
2357 #define __NORETURN __attribute__((__noreturn__))
2362 static void __NORETURN
2365 /* XXX: Restore tty modes and let the OS cleanup the rest! */
2371 static void __NORETURN
2372 die(const char *err, ...)
2378 va_start(args, err);
2379 fputs("tig: ", stderr);
2380 vfprintf(stderr, err, args);
2381 fputs("\n", stderr);
2388 main(int argc, char *argv[])
2391 enum request request;
2394 signal(SIGINT, quit);
2396 if (!parse_options(argc, argv))
2399 if (load_refs() == ERR)
2400 die("Failed to load refs.");
2402 /* Require a git repository unless when running in pager mode. */
2403 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
2404 die("Not a git repository");
2406 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
2407 view->cmd_env = getenv(view->cmd_env);
2409 request = opt_request;
2413 while (view_driver(display[current_view], request)) {
2417 foreach_view (view, i)
2420 /* Refresh, accept single keystroke of input */
2421 key = wgetch(status_win);
2422 request = get_request(key);
2424 /* Some low-level request handling. This keeps access to
2425 * status_win restricted. */
2429 /* Temporarily switch to line-oriented and echoed
2434 if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
2435 memcpy(opt_cmd, "git ", 4);
2436 opt_request = REQ_VIEW_PAGER;
2445 case REQ_SCREEN_RESIZE:
2449 getmaxyx(stdscr, height, width);
2451 /* Resize the status view and let the view driver take
2452 * care of resizing the displayed views. */
2453 wresize(status_win, 1, width);
2454 mvwin(status_win, height - 1, 0);
2455 wrefresh(status_win);
2470 * Revision specification
2471 * ----------------------
2472 * This section describes various ways to specify what revisions to display
2473 * or otherwise limit the view to. tig(1) does not itself parse the described
2474 * revision options so refer to the relevant git man pages for futher
2475 * information. Relevant man pages besides git-log(1) are git-diff(1) and
2478 * You can tune the interaction with git by making use of the options
2479 * explained in this section. For example, by configuring the environment
2480 * variables described in the <<view-commands, "View commands">> section.
2482 * Limit by path name
2483 * ~~~~~~~~~~~~~~~~~~
2484 * If you are interested only in those revisions that made changes to a
2485 * specific file (or even several files) list the files like this:
2487 * $ tig log Makefile README
2489 * To avoid ambiguity with repository references such as tag name, be sure
2490 * to separate file names from other git options using "\--". So if you
2491 * have a file named 'master' it will clash with the reference named
2492 * 'master', and thus you will have to use:
2494 * $ tig log -- master
2496 * NOTE: For the main view, avoiding ambiguity will in some cases require
2497 * you to specify two "\--" options. The first will make tig(1) stop
2498 * option processing and the latter will be passed to git log.
2500 * Limit by date or number
2501 * ~~~~~~~~~~~~~~~~~~~~~~~
2502 * To speed up interaction with git, you can limit the amount of commits
2503 * to show both for the log and main view. Either limit by date using
2504 * e.g. `--since=1.month` or limit by the number of commits using `-n400`.
2506 * If you are only interested in changed that happened between two dates
2509 * $ tig -- --after="May 5th" --before="2006-05-16 15:44"
2511 * NOTE: If you want to avoid having to quote dates containing spaces you
2512 * can use "." instead, e.g. `--after=May.5th`.
2514 * Limiting by commit ranges
2515 * ~~~~~~~~~~~~~~~~~~~~~~~~~
2516 * Alternatively, commits can be limited to a specific range, such as
2517 * "all commits between 'tag-1.0' and 'tag-2.0'". For example:
2519 * $ tig log tag-1.0..tag-2.0
2521 * This way of commit limiting makes it trivial to only browse the commits
2522 * which haven't been pushed to a remote branch. Assuming 'origin' is your
2523 * upstream remote branch, using:
2525 * $ tig log origin..HEAD
2527 * will list what will be pushed to the remote branch. Optionally, the ending
2528 * 'HEAD' can be left out since it is implied.
2530 * Limiting by reachability
2531 * ~~~~~~~~~~~~~~~~~~~~~~~~
2532 * Git interprets the range specifier "tag-1.0..tag-2.0" as
2533 * "all commits reachable from 'tag-2.0' but not from 'tag-1.0'".
2534 * Where reachability refers to what commits are ancestors (or part of the
2535 * history) of the branch or tagged revision in question.
2537 * If you prefer to specify which commit to preview in this way use the
2540 * $ tig log tag-2.0 ^tag-1.0
2542 * You can think of '^' as a negation operator. Using this alternate syntax,
2543 * it is possible to further prune commits by specifying multiple branch
2546 * Combining revisions specification
2547 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2548 * Revisions options can to some degree be combined, which makes it possible
2549 * to say "show at most 20 commits from within the last month that changed
2550 * files under the Documentation/ directory."
2552 * $ tig -- --since=1.month -n20 -- Documentation/
2554 * Examining all repository references
2555 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2556 * In some cases, it can be useful to query changes across all references
2557 * in a repository. An example is to ask "did any line of development in
2558 * this repository change a particular file within the last week". This
2559 * can be accomplished using:
2561 * $ tig -- --all --since=1.week -- Makefile
2565 * Known bugs and problems:
2567 * - In it's current state tig is pretty much UTF-8 only.
2569 * - If the screen width is very small the main view can draw
2570 * outside the current view causing bad wrapping. Same goes
2571 * for title and status windows.
2575 * Features that should be explored.
2583 * Copyright (c) Jonas Fonseca <fonseca@diku.dk>, 2006
2585 * This program is free software; you can redistribute it and/or modify
2586 * it under the terms of the GNU General Public License as published by
2587 * the Free Software Foundation; either version 2 of the License, or
2588 * (at your option) any later version.
2593 * link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)],
2594 * link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)]
2595 * gitk(1): git repository browser written using tcl/tk,
2596 * qgit(1): git repository browser written using c++/Qt,
2597 * gitview(1): git repository browser written using python/gtk.