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.
19 * tig - text-mode interface for git
25 * tig [options] [--] [git log options]
26 * tig [options] log [git log options]
27 * tig [options] diff [git diff options]
28 * tig [options] show [git show options]
29 * tig [options] < [git command output]
33 * Browse changes in a git repository. Additionally, tig(1) can also act
34 * as a pager for output of various git commands.
36 * When browsing repositories, tig(1) uses the underlying git commands
37 * to present the user with various views, such as summarized commit log
38 * and showing the commit with the log message, diffstat, and the diff.
40 * Using tig(1) as a pager, it will display input from stdin and try
45 #define VERSION "tig-0.3"
65 static void die(const char *err, ...);
66 static void report(const char *msg, ...);
67 static int read_properties(const char *cmd, int separator, int (*read)(char *, int, char *, int));
68 static void set_nonblocking_input(bool loading);
69 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
71 #define ABS(x) ((x) >= 0 ? (x) : -(x))
72 #define MIN(x, y) ((x) < (y) ? (x) : (y))
74 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
75 #define STRING_SIZE(x) (sizeof(x) - 1)
77 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
78 #define SIZEOF_CMD 1024 /* Size of command buffer. */
80 /* This color name can be used to refer to the default term colors. */
81 #define COLOR_DEFAULT (-1)
83 #define TIG_HELP "(d)iff, (l)og, (m)ain, (q)uit, (h)elp"
85 /* The format and size of the date column in the main view. */
86 #define DATE_FORMAT "%Y-%m-%d %H:%M"
87 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
89 #define AUTHOR_COLS 20
91 /* The default interval between line numbers. */
92 #define NUMBER_INTERVAL 1
96 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
98 /* Some ascii-shorthands fitted into the ncurses namespace. */
100 #define KEY_RETURN '\r'
104 /* User action requests. */
106 /* Offset all requests to avoid conflicts with ncurses getch values. */
107 REQ_OFFSET = KEY_MAX + 1,
109 /* XXX: Keep the view request first and in sync with views[]. */
124 REQ_TOGGLE_LINE_NUMBERS,
138 REQ_SCROLL_LINE_DOWN,
140 REQ_SCROLL_PAGE_DOWN,
144 char *name; /* Ref name; tag or head names are shortened. */
145 char id[41]; /* Commit SHA1 ID */
146 unsigned int tag:1; /* Is it a tag? */
147 unsigned int next:1; /* For ref lists: are there more refs? */
150 static struct ref **get_refs(char *id);
158 string_ncopy(char *dst, const char *src, int dstlen)
160 strncpy(dst, src, dstlen - 1);
165 /* Shorthand for safely copying into a fixed buffer. */
166 #define string_copy(dst, src) \
167 string_ncopy(dst, src, sizeof(dst))
172 * NOTE: The following is a slightly modified copy of the git project's shell
173 * quoting routines found in the quote.c file.
175 * Help to copy the thing properly quoted for the shell safety. any single
176 * quote is replaced with '\'', any exclamation point is replaced with '\!',
177 * and the whole thing is enclosed in a
180 * original sq_quote result
181 * name ==> name ==> 'name'
182 * a b ==> a b ==> 'a b'
183 * a'b ==> a'\''b ==> 'a'\''b'
184 * a!b ==> a'\!'b ==> 'a'\!'b'
188 sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
192 #define BUFPUT(x) do { if (bufsize < SIZEOF_CMD) buf[bufsize++] = (x); } while (0)
195 while ((c = *src++)) {
196 if (c == '\'' || c == '!') {
216 static const char usage[] =
217 VERSION " (" __DATE__ ")\n"
219 "Usage: tig [options]\n"
220 " or: tig [options] [--] [git log options]\n"
221 " or: tig [options] log [git log options]\n"
222 " or: tig [options] diff [git diff options]\n"
223 " or: tig [options] show [git show options]\n"
224 " or: tig [options] < [git command output]\n"
227 " -l Start up in log view\n"
228 " -d Start up in diff view\n"
229 " -n[I], --line-number[=I] Show line numbers with given interval\n"
230 " -t[N], --tab-size[=N] Set number of spaces for tab expansion\n"
231 " -- Mark end of tig options\n"
232 " -v, --version Show version and exit\n"
233 " -h, --help Show help message and exit\n";
235 /* Option and state variables. */
236 static bool opt_line_number = FALSE;
237 static int opt_num_interval = NUMBER_INTERVAL;
238 static int opt_tab_size = TABSIZE;
239 static enum request opt_request = REQ_VIEW_MAIN;
240 static char opt_cmd[SIZEOF_CMD] = "";
241 static char opt_encoding[20] = "";
242 static bool opt_utf8 = TRUE;
243 static FILE *opt_pipe = NULL;
245 /* Returns the index of log or diff command or -1 to exit. */
247 parse_options(int argc, char *argv[])
251 for (i = 1; i < argc; i++) {
256 * Start up in log view using the internal log command.
258 if (!strcmp(opt, "-l")) {
259 opt_request = REQ_VIEW_LOG;
265 * Start up in diff view using the internal diff command.
267 if (!strcmp(opt, "-d")) {
268 opt_request = REQ_VIEW_DIFF;
273 * -n[INTERVAL], --line-number[=INTERVAL]::
274 * Prefix line numbers in log and diff view.
275 * Optionally, with interval different than each line.
277 if (!strncmp(opt, "-n", 2) ||
278 !strncmp(opt, "--line-number", 13)) {
284 } else if (opt[STRING_SIZE("--line-number")] == '=') {
285 num = opt + STRING_SIZE("--line-number=");
289 opt_num_interval = atoi(num);
291 opt_line_number = TRUE;
296 * -t[NSPACES], --tab-size[=NSPACES]::
297 * Set the number of spaces tabs should be expanded to.
299 if (!strncmp(opt, "-t", 2) ||
300 !strncmp(opt, "--tab-size", 10)) {
306 } else if (opt[STRING_SIZE("--tab-size")] == '=') {
307 num = opt + STRING_SIZE("--tab-size=");
311 opt_tab_size = MIN(atoi(num), TABSIZE);
317 * Show version and exit.
319 if (!strcmp(opt, "-v") ||
320 !strcmp(opt, "--version")) {
321 printf("tig version %s\n", VERSION);
327 * Show help message and exit.
329 if (!strcmp(opt, "-h") ||
330 !strcmp(opt, "--help")) {
337 * End of tig(1) options. Useful when specifying command
338 * options for the main view. Example:
340 * $ tig -- --since=1.month
342 if (!strcmp(opt, "--")) {
348 * log [git log options]::
349 * Open log view using the given git log options.
351 * diff [git diff options]::
352 * Open diff view using the given git diff options.
354 * show [git show options]::
355 * Open diff view using the given git show options.
357 if (!strcmp(opt, "log") ||
358 !strcmp(opt, "diff") ||
359 !strcmp(opt, "show")) {
360 opt_request = opt[0] == 'l'
361 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
366 * [git log options]::
367 * tig(1) will stop the option parsing when the first
368 * command line parameter not starting with "-" is
369 * encountered. All options including this one will be
370 * passed to git log when loading the main view.
371 * This makes it possible to say:
373 * $ tig tag-1.0..HEAD
375 if (opt[0] && opt[0] != '-')
378 die("unknown command '%s'", opt);
381 if (!isatty(STDIN_FILENO)) {
385 * If stdin is a pipe, any log or diff options will be ignored and the
386 * pager view will be opened loading data from stdin. The pager mode
387 * can be used for colorizing output from various git commands.
389 * Example on how to colorize the output of git-show(1):
393 opt_request = REQ_VIEW_PAGER;
396 } else if (i < argc) {
400 * Git command options
401 * ~~~~~~~~~~~~~~~~~~~
402 * All git command options specified on the command line will
403 * be passed to the given command and all will be shell quoted
404 * before they are passed to the shell.
406 * NOTE: If you specify options for the main view, you should
407 * not use the `--pretty` option as this option will be set
408 * automatically to the format expected by the main view.
410 * Example on how to open the log view and show both author and
411 * committer information:
413 * $ tig log --pretty=fuller
415 * See the <<refspec, "Specifying revisions">> section below
416 * for an introduction to revision options supported by the git
417 * commands. For details on specific git command options, refer
418 * to the man page of the command in question.
421 if (opt_request == REQ_VIEW_MAIN)
422 /* XXX: This is vulnerable to the user overriding
423 * options required for the main view parser. */
424 string_copy(opt_cmd, "git log --stat --pretty=raw");
426 string_copy(opt_cmd, "git");
427 buf_size = strlen(opt_cmd);
429 while (buf_size < sizeof(opt_cmd) && i < argc) {
430 opt_cmd[buf_size++] = ' ';
431 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
434 if (buf_size >= sizeof(opt_cmd))
435 die("command too long");
437 opt_cmd[buf_size] = 0;
441 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
449 * ENVIRONMENT VARIABLES
450 * ---------------------
451 * Several options related to the interface with git can be configured
452 * via environment options.
454 * Repository references
455 * ~~~~~~~~~~~~~~~~~~~~~
456 * Commits that are referenced by tags and branch heads will be marked
457 * by the reference name surrounded by '[' and ']':
459 * 2006-03-26 19:42 Petr Baudis | [cogito-0.17.1] Cogito 0.17.1
461 * If you want to filter out certain directories under `.git/refs/`, say
462 * `tmp` you can do it by setting the following variable:
464 * $ TIG_LS_REMOTE="git ls-remote . | sed /\/tmp\//d" tig
466 * Or set the variable permanently in your environment.
469 * Set command for retrieving all repository references. The command
470 * should output data in the same format as git-ls-remote(1).
473 #define TIG_LS_REMOTE \
474 "git ls-remote . 2>/dev/null"
477 * [[history-commands]]
480 * It is possible to alter which commands are used for the different views.
481 * If for example you prefer commits in the main view to be sorted by date
482 * and only show 500 commits, use:
484 * $ TIG_MAIN_CMD="git log --date-order -n500 --pretty=raw %s" tig
486 * Or set the variable permanently in your environment.
488 * Notice, how `%s` is used to specify the commit reference. There can
489 * be a maximum of 5 `%s` ref specifications.
492 * The command used for the diff view. By default, git show is used
496 * The command used for the log view. If you prefer to have both
497 * author and committer shown in the log view be sure to pass
498 * `--pretty=fuller` to git log.
501 * The command used for the main view. Note, you must always specify
502 * the option: `--pretty=raw` since the main view parser expects to
506 #define TIG_DIFF_CMD \
507 "git show --patch-with-stat --find-copies-harder -B -C %s"
509 #define TIG_LOG_CMD \
510 "git log --cc --stat -n100 %s"
512 #define TIG_MAIN_CMD \
513 "git log --topo-order --stat --pretty=raw %s"
515 /* ... silently ignore that the following are also exported. */
517 #define TIG_HELP_CMD \
518 "man tig 2>/dev/null"
520 #define TIG_PAGER_CMD \
525 * Line-oriented content detection.
529 /* Line type String to match Foreground Background Attributes
530 * --------- --------------- ---------- ---------- ---------- */ \
532 LINE(DIFF, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
533 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
534 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
535 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
536 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
537 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
538 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
539 LINE(DIFF_COPY, "copy ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
540 LINE(DIFF_RENAME, "rename ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
541 LINE(DIFF_SIM, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
542 LINE(DIFF_DISSIM, "dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
543 /* Pretty print commit header */ \
544 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
545 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
546 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
547 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
548 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
549 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
550 /* Raw commit header */ \
551 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
552 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
553 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
554 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
555 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
557 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
558 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
560 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
561 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
562 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
563 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
564 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
565 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
566 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
567 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
568 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
569 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
570 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD),
573 #define LINE(type, line, fg, bg, attr) \
580 const char *line; /* The start of line to match. */
581 int linelen; /* Size of string to match. */
582 int fg, bg, attr; /* Color and text attributes for the lines. */
585 static struct line_info line_info[] = {
586 #define LINE(type, line, fg, bg, attr) \
587 { (line), STRING_SIZE(line), (fg), (bg), (attr) }
592 static enum line_type
593 get_line_type(char *line)
595 int linelen = strlen(line);
598 for (type = 0; type < ARRAY_SIZE(line_info); type++)
599 /* Case insensitive search matches Signed-off-by lines better. */
600 if (linelen >= line_info[type].linelen &&
601 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
608 get_line_attr(enum line_type type)
610 assert(type < ARRAY_SIZE(line_info));
611 return COLOR_PAIR(type) | line_info[type].attr;
617 int default_bg = COLOR_BLACK;
618 int default_fg = COLOR_WHITE;
623 if (use_default_colors() != ERR) {
628 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
629 struct line_info *info = &line_info[type];
630 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
631 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
633 init_pair(type, fg, bg);
639 void *data; /* User data */
646 * The display consists of a status window on the last line of the screen and
647 * one or more views. The default is to only show one view at the time but it
648 * is possible to split both the main and log view to also show the commit
651 * If you are in the log view and press 'Enter' when the current line is a
652 * commit line, such as:
654 * commit 4d55caff4cc89335192f3e566004b4ceef572521
656 * You will split the view so that the log view is displayed in the top window
657 * and the diff view in the bottom window. You can switch between the two
658 * views by pressing 'Tab'. To maximize the log view again, simply press 'l'.
664 /* The display array of active views and the index of the current view. */
665 static struct view *display[2];
666 static unsigned int current_view;
668 #define foreach_view(view, i) \
669 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
671 #define displayed_views() (display[1] != NULL ? 2 : 1)
674 * Current head and commit ID
675 * ~~~~~~~~~~~~~~~~~~~~~~~~~~
676 * The viewer keeps track of both what head and commit ID you are currently
677 * viewing. The commit ID will follow the cursor line and change everytime time
678 * you highlight a different commit. Whenever you reopen the diff view it
679 * will be reloaded, if the commit ID changed.
681 * The head ID is used when opening the main and log view to indicate from
682 * what revision to show history.
685 static char ref_commit[SIZEOF_REF] = "HEAD";
686 static char ref_head[SIZEOF_REF] = "HEAD";
689 const char *name; /* View name */
690 const char *cmd_fmt; /* Default command line format */
691 const char *cmd_env; /* Command line set via environment */
692 const char *id; /* Points to either of ref_{head,commit} */
694 struct view_ops *ops; /* View operations */
696 char cmd[SIZEOF_CMD]; /* Command buffer */
697 char ref[SIZEOF_REF]; /* Hovered commit reference */
698 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
700 int height, width; /* The width and height of the main window */
701 WINDOW *win; /* The main window */
702 WINDOW *title; /* The title window living below the main window */
705 unsigned long offset; /* Offset of the window top */
706 unsigned long lineno; /* Current line number */
708 /* If non-NULL, points to the view that opened this view. If this view
709 * is closed tig will switch back to the parent view. */
713 unsigned long lines; /* Total number of lines */
714 struct line *line; /* Line index */
715 unsigned int digits; /* Number of digits in the lines member. */
723 /* What type of content being displayed. Used in the title bar. */
725 /* Draw one line; @lineno must be < view->height. */
726 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
727 /* Read one line; updates view->line. */
728 bool (*read)(struct view *view, struct line *prev, char *data);
729 /* Depending on view, change display based on current line. */
730 bool (*enter)(struct view *view, struct line *line);
733 static struct view_ops pager_ops;
734 static struct view_ops main_ops;
736 #define VIEW_STR(name, cmd, env, ref, ops) \
737 { name, cmd, #env, ref, ops }
739 #define VIEW_(id, name, ops, ref) \
740 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops)
745 * tig(1) presents various 'views' of a repository. Each view is based on output
746 * from an external command, most often 'git log', 'git diff', or 'git show'.
749 * Is the default view, and it shows a one line summary of each commit
750 * in the chosen list of revisions. The summary includes commit date,
751 * author, and the first line of the log message. Additionally, any
752 * repository references, such as tags, will be shown.
755 * Presents a more rich view of the revision log showing the whole log
756 * message and the diffstat.
759 * Shows either the diff of the current working tree, that is, what
760 * has changed since the last commit, or the commit diff complete
761 * with log message, diffstat and diff.
764 * Is used for displaying both input from stdin and output from git
765 * commands entered in the internal prompt.
768 * Displays the information from the tig(1) man page. For the help view
769 * to work you need to have the tig(1) man page installed.
772 static struct view views[] = {
773 VIEW_(MAIN, "main", &main_ops, ref_head),
774 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
775 VIEW_(LOG, "log", &pager_ops, ref_head),
776 VIEW_(HELP, "help", &pager_ops, "static"),
777 VIEW_(PAGER, "pager", &pager_ops, "static"),
780 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
784 draw_view_line(struct view *view, unsigned int lineno)
786 if (view->offset + lineno >= view->lines)
789 return view->ops->draw(view, &view->line[view->offset + lineno], lineno);
793 redraw_view_from(struct view *view, int lineno)
795 assert(0 <= lineno && lineno < view->height);
797 for (; lineno < view->height; lineno++) {
798 if (!draw_view_line(view, lineno))
802 redrawwin(view->win);
807 redraw_view(struct view *view)
810 redraw_view_from(view, 0);
817 * Each view has a title window which shows the name of the view, current
818 * commit ID if available, and where the view is positioned:
820 * [main] c622eefaa485995320bc743431bae0d497b1d875 - commit 1 of 61 (1%)
822 * By default, the title of the current view is highlighted using bold font.
826 update_view_title(struct view *view)
828 if (view == display[current_view])
829 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
831 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
834 wmove(view->title, 0, 0);
837 wprintw(view->title, "[%s] %s", view->name, view->ref);
839 wprintw(view->title, "[%s]", view->name);
841 if (view->lines || view->pipe) {
842 unsigned int lines = view->lines
843 ? (view->lineno + 1) * 100 / view->lines
846 wprintw(view->title, " - %s %d of %d (%d%%)",
854 time_t secs = time(NULL) - view->start_time;
856 /* Three git seconds are a long time ... */
858 wprintw(view->title, " %lds", secs);
861 wmove(view->title, 0, view->width - 1);
862 wrefresh(view->title);
869 struct view *base = display[0];
870 struct view *view = display[1] ? display[1] : display[0];
872 /* Setup window dimensions */
874 getmaxyx(stdscr, base->height, base->width);
876 /* Make room for the status window. */
880 /* Horizontal split. */
881 view->width = base->width;
882 view->height = SCALE_SPLIT_VIEW(base->height);
883 base->height -= view->height;
885 /* Make room for the title bar. */
889 /* Make room for the title bar. */
894 foreach_view (view, i) {
896 view->win = newwin(view->height, 0, offset, 0);
898 die("Failed to create %s view", view->name);
900 scrollok(view->win, TRUE);
902 view->title = newwin(1, 0, offset + view->height, 0);
904 die("Failed to create title window");
907 wresize(view->win, view->height, view->width);
908 mvwin(view->win, offset, 0);
909 mvwin(view->title, offset + view->height, 0);
912 offset += view->height + 1;
922 foreach_view (view, i) {
924 update_view_title(view);
929 update_display_cursor(void)
931 struct view *view = display[current_view];
933 /* Move the cursor to the right-most column of the cursor line.
935 * XXX: This could turn out to be a bit expensive, but it ensures that
936 * the cursor does not jump around. */
938 wmove(view->win, view->lineno - view->offset, view->width - 1);
947 /* Scrolling backend */
949 do_scroll_view(struct view *view, int lines, bool redraw)
951 /* The rendering expects the new offset. */
952 view->offset += lines;
954 assert(0 <= view->offset && view->offset < view->lines);
957 /* Redraw the whole screen if scrolling is pointless. */
958 if (view->height < ABS(lines)) {
962 int line = lines > 0 ? view->height - lines : 0;
963 int end = line + ABS(lines);
965 wscrl(view->win, lines);
967 for (; line < end; line++) {
968 if (!draw_view_line(view, line))
973 /* Move current line into the view. */
974 if (view->lineno < view->offset) {
975 view->lineno = view->offset;
976 draw_view_line(view, 0);
978 } else if (view->lineno >= view->offset + view->height) {
979 if (view->lineno == view->offset + view->height) {
980 /* Clear the hidden line so it doesn't show if the view
982 wmove(view->win, view->height, 0);
983 wclrtoeol(view->win);
985 view->lineno = view->offset + view->height - 1;
986 draw_view_line(view, view->lineno - view->offset);
989 assert(view->offset <= view->lineno && view->lineno < view->lines);
994 redrawwin(view->win);
999 /* Scroll frontend */
1001 scroll_view(struct view *view, enum request request)
1006 case REQ_SCROLL_PAGE_DOWN:
1007 lines = view->height;
1008 case REQ_SCROLL_LINE_DOWN:
1009 if (view->offset + lines > view->lines)
1010 lines = view->lines - view->offset;
1012 if (lines == 0 || view->offset + view->height >= view->lines) {
1013 report("Cannot scroll beyond the last line");
1018 case REQ_SCROLL_PAGE_UP:
1019 lines = view->height;
1020 case REQ_SCROLL_LINE_UP:
1021 if (lines > view->offset)
1022 lines = view->offset;
1025 report("Cannot scroll beyond the first line");
1033 die("request %d not handled in switch", request);
1036 do_scroll_view(view, lines, TRUE);
1041 move_view(struct view *view, enum request request, bool redraw)
1046 case REQ_MOVE_FIRST_LINE:
1047 steps = -view->lineno;
1050 case REQ_MOVE_LAST_LINE:
1051 steps = view->lines - view->lineno - 1;
1054 case REQ_MOVE_PAGE_UP:
1055 steps = view->height > view->lineno
1056 ? -view->lineno : -view->height;
1059 case REQ_MOVE_PAGE_DOWN:
1060 steps = view->lineno + view->height >= view->lines
1061 ? view->lines - view->lineno - 1 : view->height;
1073 die("request %d not handled in switch", request);
1076 if (steps <= 0 && view->lineno == 0) {
1077 report("Cannot move beyond the first line");
1080 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1081 report("Cannot move beyond the last line");
1085 /* Move the current line */
1086 view->lineno += steps;
1087 assert(0 <= view->lineno && view->lineno < view->lines);
1089 /* Repaint the old "current" line if we be scrolling */
1090 if (ABS(steps) < view->height) {
1091 int prev_lineno = view->lineno - steps - view->offset;
1093 wmove(view->win, prev_lineno, 0);
1094 wclrtoeol(view->win);
1095 draw_view_line(view, prev_lineno);
1098 /* Check whether the view needs to be scrolled */
1099 if (view->lineno < view->offset ||
1100 view->lineno >= view->offset + view->height) {
1101 if (steps < 0 && -steps > view->offset) {
1102 steps = -view->offset;
1104 } else if (steps > 0) {
1105 if (view->lineno == view->lines - 1 &&
1106 view->lines > view->height) {
1107 steps = view->lines - view->offset - 1;
1108 if (steps >= view->height)
1109 steps -= view->height - 1;
1113 do_scroll_view(view, steps, redraw);
1117 /* Draw the current line */
1118 draw_view_line(view, view->lineno - view->offset);
1123 redrawwin(view->win);
1124 wrefresh(view->win);
1130 * Incremental updating
1134 end_update(struct view *view)
1138 set_nonblocking_input(FALSE);
1139 if (view->pipe == stdin)
1147 begin_update(struct view *view)
1149 const char *id = view->id;
1155 string_copy(view->cmd, opt_cmd);
1157 /* When running random commands, the view ref could have become
1158 * invalid so clear it. */
1161 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1163 if (snprintf(view->cmd, sizeof(view->cmd), format,
1164 id, id, id, id, id) >= sizeof(view->cmd))
1168 /* Special case for the pager view. */
1170 view->pipe = opt_pipe;
1173 view->pipe = popen(view->cmd, "r");
1179 set_nonblocking_input(TRUE);
1184 string_copy(view->vid, id);
1189 for (i = 0; i < view->lines; i++)
1190 if (view->line[i].data)
1191 free(view->line[i].data);
1197 view->start_time = time(NULL);
1203 update_view(struct view *view)
1205 char buffer[BUFSIZ];
1208 /* The number of lines to read. If too low it will cause too much
1209 * redrawing (and possible flickering), if too high responsiveness
1211 unsigned long lines = view->height;
1212 int redraw_from = -1;
1217 /* Only redraw if lines are visible. */
1218 if (view->offset + view->height >= view->lines)
1219 redraw_from = view->lines - view->offset;
1221 tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines));
1227 while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
1228 int linelen = strlen(line);
1230 struct line *prev = view->lines
1231 ? &view->line[view->lines - 1]
1235 line[linelen - 1] = 0;
1237 if (!view->ops->read(view, prev, line))
1247 lines = view->lines;
1248 for (digits = 0; lines; digits++)
1251 /* Keep the displayed view in sync with line number scaling. */
1252 if (digits != view->digits) {
1253 view->digits = digits;
1258 if (redraw_from >= 0) {
1259 /* If this is an incremental update, redraw the previous line
1260 * since for commits some members could have changed when
1261 * loading the main view. */
1262 if (redraw_from > 0)
1265 /* Incrementally draw avoids flickering. */
1266 redraw_view_from(view, redraw_from);
1269 /* Update the title _after_ the redraw so that if the redraw picks up a
1270 * commit reference in view->ref it'll be available here. */
1271 update_view_title(view);
1273 if (ferror(view->pipe)) {
1274 report("Failed to read: %s", strerror(errno));
1277 } else if (feof(view->pipe)) {
1278 if (view == VIEW(REQ_VIEW_HELP)) {
1279 const char *msg = TIG_HELP;
1281 if (view->lines == 0) {
1282 /* Slightly ugly, but abusing view->ref keeps
1283 * the error message. */
1284 string_copy(view->ref, "No help available");
1285 msg = "The tig(1) manpage is not installed";
1299 report("Allocation failure");
1307 OPEN_DEFAULT = 0, /* Use default view switching. */
1308 OPEN_SPLIT = 1, /* Split current view. */
1309 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1310 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1314 open_view(struct view *prev, enum request request, enum open_flags flags)
1316 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1317 bool split = !!(flags & OPEN_SPLIT);
1318 bool reload = !!(flags & OPEN_RELOAD);
1319 struct view *view = VIEW(request);
1320 int nviews = displayed_views();
1321 struct view *base_view = display[0];
1323 if (view == prev && nviews == 1 && !reload) {
1324 report("Already in %s view", view->name);
1328 if ((reload || strcmp(view->vid, view->id)) &&
1329 !begin_update(view)) {
1330 report("Failed to load %s view", view->name);
1335 display[current_view + 1] = view;
1339 /* Maximize the current view. */
1340 memset(display, 0, sizeof(display));
1342 display[current_view] = view;
1345 /* Resize the view when switching between split- and full-screen,
1346 * or when switching between two different full-screen views. */
1347 if (nviews != displayed_views() ||
1348 (nviews == 1 && base_view != display[0]))
1351 if (split && prev->lineno - prev->offset >= prev->height) {
1352 /* Take the title line into account. */
1353 int lines = prev->lineno - prev->offset - prev->height + 1;
1355 /* Scroll the view that was split if the current line is
1356 * outside the new limited view. */
1357 do_scroll_view(prev, lines, TRUE);
1360 if (prev && view != prev) {
1361 if (split && !backgrounded) {
1362 /* "Blur" the previous view. */
1363 update_view_title(prev);
1366 view->parent = prev;
1369 if (view->pipe && view->lines == 0) {
1370 /* Clear the old view and let the incremental updating refill
1376 if (view == VIEW(REQ_VIEW_HELP))
1377 report("%s", TIG_HELP);
1382 /* If the view is backgrounded the above calls to report()
1383 * won't redraw the view title. */
1385 update_view_title(view);
1390 * User request switch noodle
1394 view_driver(struct view *view, enum request request)
1401 case REQ_MOVE_PAGE_UP:
1402 case REQ_MOVE_PAGE_DOWN:
1403 case REQ_MOVE_FIRST_LINE:
1404 case REQ_MOVE_LAST_LINE:
1405 move_view(view, request, TRUE);
1408 case REQ_SCROLL_LINE_DOWN:
1409 case REQ_SCROLL_LINE_UP:
1410 case REQ_SCROLL_PAGE_DOWN:
1411 case REQ_SCROLL_PAGE_UP:
1412 scroll_view(view, request);
1419 case REQ_VIEW_PAGER:
1420 open_view(view, request, OPEN_DEFAULT);
1425 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
1427 if (view == VIEW(REQ_VIEW_DIFF) &&
1428 view->parent == VIEW(REQ_VIEW_MAIN)) {
1429 bool redraw = display[1] == view;
1431 view = view->parent;
1432 move_view(view, request, redraw);
1434 update_view_title(view);
1436 move_view(view, request, TRUE);
1443 report("Nothing to enter");
1446 return view->ops->enter(view, &view->line[view->lineno]);
1450 int nviews = displayed_views();
1451 int next_view = (current_view + 1) % nviews;
1453 if (next_view == current_view) {
1454 report("Only one view is displayed");
1458 current_view = next_view;
1459 /* Blur out the title of the previous view. */
1460 update_view_title(view);
1464 case REQ_TOGGLE_LINE_NUMBERS:
1465 opt_line_number = !opt_line_number;
1470 /* Always reload^Wrerun commands from the prompt. */
1471 open_view(view, opt_request, OPEN_RELOAD);
1474 case REQ_STOP_LOADING:
1475 foreach_view (view, i) {
1477 report("Stopped loaded the %s view", view->name),
1482 case REQ_SHOW_VERSION:
1483 report("%s (built %s)", VERSION, __DATE__);
1486 case REQ_SCREEN_RESIZE:
1489 case REQ_SCREEN_REDRAW:
1493 case REQ_SCREEN_UPDATE:
1497 case REQ_VIEW_CLOSE:
1498 /* XXX: Mark closed views by letting view->parent point to the
1499 * view itself. Parents to closed view should never be
1502 view->parent->parent != view->parent) {
1503 memset(display, 0, sizeof(display));
1505 display[current_view] = view->parent;
1506 view->parent = view;
1516 /* An unknown key will show most commonly used commands. */
1517 report("Unknown key, press 'h' for help");
1530 pager_draw(struct view *view, struct line *line, unsigned int lineno)
1532 char *text = line->data;
1533 enum line_type type = line->type;
1534 int textlen = strlen(text);
1537 wmove(view->win, lineno, 0);
1539 if (view->offset + lineno == view->lineno) {
1540 if (type == LINE_COMMIT) {
1541 string_copy(view->ref, text + 7);
1542 string_copy(ref_commit, view->ref);
1546 wchgat(view->win, -1, 0, type, NULL);
1549 attr = get_line_attr(type);
1550 wattrset(view->win, attr);
1552 if (opt_line_number || opt_tab_size < TABSIZE) {
1553 static char spaces[] = " ";
1554 int col_offset = 0, col = 0;
1556 if (opt_line_number) {
1557 unsigned long real_lineno = view->offset + lineno + 1;
1559 if (real_lineno == 1 ||
1560 (real_lineno % opt_num_interval) == 0) {
1561 wprintw(view->win, "%.*d", view->digits, real_lineno);
1564 waddnstr(view->win, spaces,
1565 MIN(view->digits, STRING_SIZE(spaces)));
1567 waddstr(view->win, ": ");
1568 col_offset = view->digits + 2;
1571 while (text && col_offset + col < view->width) {
1572 int cols_max = view->width - col_offset - col;
1576 if (*text == '\t') {
1578 assert(sizeof(spaces) > TABSIZE);
1580 cols = opt_tab_size - (col % opt_tab_size);
1583 text = strchr(text, '\t');
1584 cols = line ? text - pos : strlen(pos);
1587 waddnstr(view->win, pos, MIN(cols, cols_max));
1592 int col = 0, pos = 0;
1594 for (; pos < textlen && col < view->width; pos++, col++)
1595 if (text[pos] == '\t')
1596 col += TABSIZE - (col % TABSIZE) - 1;
1598 waddnstr(view->win, text, pos);
1605 pager_read(struct view *view, struct line *prev, char *line)
1607 /* Compress empty lines in the help view. */
1608 if (view == VIEW(REQ_VIEW_HELP) &&
1609 !*line && prev && !*((char *) prev->data))
1612 view->line[view->lines].data = strdup(line);
1613 if (!view->line[view->lines].data)
1616 view->line[view->lines].type = get_line_type(line);
1623 pager_enter(struct view *view, struct line *line)
1627 if (line->type == LINE_COMMIT &&
1628 (view == VIEW(REQ_VIEW_LOG) ||
1629 view == VIEW(REQ_VIEW_PAGER))) {
1630 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
1634 /* Always scroll the view even if it was split. That way
1635 * you can use Enter to scroll through the log view and
1636 * split open each commit diff. */
1637 scroll_view(view, REQ_SCROLL_LINE_DOWN);
1639 /* FIXME: A minor workaround. Scrolling the view will call report("")
1640 * but if we are scrolling a non-current view this won't properly
1641 * update the view title. */
1643 update_view_title(view);
1648 static struct view_ops pager_ops = {
1661 char id[41]; /* SHA1 ID. */
1662 char title[75]; /* The first line of the commit message. */
1663 char author[75]; /* The author of the commit. */
1664 struct tm time; /* Date from the author ident. */
1665 struct ref **refs; /* Repository references; tags & branch heads. */
1669 main_draw(struct view *view, struct line *line, unsigned int lineno)
1671 char buf[DATE_COLS + 1];
1672 struct commit *commit = line->data;
1673 enum line_type type;
1679 if (!*commit->author)
1682 wmove(view->win, lineno, col);
1684 if (view->offset + lineno == view->lineno) {
1685 string_copy(view->ref, commit->id);
1686 string_copy(ref_commit, view->ref);
1688 wattrset(view->win, get_line_attr(type));
1689 wchgat(view->win, -1, 0, type, NULL);
1692 type = LINE_MAIN_COMMIT;
1693 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
1696 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
1697 waddnstr(view->win, buf, timelen);
1698 waddstr(view->win, " ");
1701 wmove(view->win, lineno, col);
1702 if (type != LINE_CURSOR)
1703 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
1706 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
1708 authorlen = strlen(commit->author);
1709 if (authorlen > AUTHOR_COLS - 2) {
1710 authorlen = AUTHOR_COLS - 2;
1716 waddnstr(view->win, commit->author, authorlen);
1717 if (type != LINE_CURSOR)
1718 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
1719 waddch(view->win, '~');
1721 waddstr(view->win, commit->author);
1725 if (type != LINE_CURSOR)
1726 wattrset(view->win, A_NORMAL);
1728 mvwaddch(view->win, lineno, col, ACS_LTEE);
1729 wmove(view->win, lineno, col + 2);
1736 if (type == LINE_CURSOR)
1738 else if (commit->refs[i]->tag)
1739 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
1741 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
1742 waddstr(view->win, "[");
1743 waddstr(view->win, commit->refs[i]->name);
1744 waddstr(view->win, "]");
1745 if (type != LINE_CURSOR)
1746 wattrset(view->win, A_NORMAL);
1747 waddstr(view->win, " ");
1748 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
1749 } while (commit->refs[i++]->next);
1752 if (type != LINE_CURSOR)
1753 wattrset(view->win, get_line_attr(type));
1756 int titlelen = strlen(commit->title);
1758 if (col + titlelen > view->width)
1759 titlelen = view->width - col;
1761 waddnstr(view->win, commit->title, titlelen);
1767 /* Reads git log --pretty=raw output and parses it into the commit struct. */
1769 main_read(struct view *view, struct line *prev, char *line)
1771 enum line_type type = get_line_type(line);
1772 struct commit *commit;
1776 commit = calloc(1, sizeof(struct commit));
1780 line += STRING_SIZE("commit ");
1782 view->line[view->lines++].data = commit;
1783 string_copy(commit->id, line);
1784 commit->refs = get_refs(commit->id);
1789 char *ident = line + STRING_SIZE("author ");
1790 char *end = strchr(ident, '<');
1795 commit = prev->data;
1798 for (; end > ident && isspace(end[-1]); end--) ;
1802 string_copy(commit->author, ident);
1804 /* Parse epoch and timezone */
1806 char *secs = strchr(end + 1, '>');
1810 if (!secs || secs[1] != ' ')
1814 time = (time_t) atol(secs);
1815 zone = strchr(secs, ' ');
1816 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
1820 tz = ('0' - zone[1]) * 60 * 60 * 10;
1821 tz += ('0' - zone[2]) * 60 * 60;
1822 tz += ('0' - zone[3]) * 60;
1823 tz += ('0' - zone[4]) * 60;
1830 gmtime_r(&time, &commit->time);
1838 commit = prev->data;
1840 /* Fill in the commit title if it has not already been set. */
1841 if (commit->title[0])
1844 /* Require titles to start with a non-space character at the
1845 * offset used by git log. */
1846 /* FIXME: More gracefull handling of titles; append "..." to
1847 * shortened titles, etc. */
1848 if (strncmp(line, " ", 4) ||
1852 string_copy(commit->title, line + 4);
1859 main_enter(struct view *view, struct line *line)
1861 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
1863 open_view(view, REQ_VIEW_DIFF, flags);
1867 static struct view_ops main_ops = {
1878 * Below the default key bindings are shown.
1886 static struct keymap keymap[] = {
1891 * Switch to main view.
1893 * Switch to diff view.
1895 * Switch to log view.
1897 * Switch to pager view.
1901 { 'm', REQ_VIEW_MAIN },
1902 { 'd', REQ_VIEW_DIFF },
1903 { 'l', REQ_VIEW_LOG },
1904 { 'p', REQ_VIEW_PAGER },
1905 { 'h', REQ_VIEW_HELP },
1911 * Close view, if multiple views are open it will jump back to the
1912 * previous view in the view stack. If it is the last open view it
1913 * will quit. Use 'Q' to quit all views at once.
1915 * This key is "context sensitive" depending on what view you are
1916 * currently in. When in log view on a commit line or in the main
1917 * view, split the view and show the commit diff. In the diff view
1918 * pressing Enter will simply scroll the view one line down.
1920 * Switch to next view.
1922 * This key is "context sensitive" and will move the cursor one
1923 * line up. However, uf you opened a diff view from the main view
1924 * (split- or full-screen) it will change the cursor to point to
1925 * the previous commit in the main view and update the diff view
1928 * Similar to 'Up' but will move down.
1930 { 'q', REQ_VIEW_CLOSE },
1931 { KEY_TAB, REQ_VIEW_NEXT },
1932 { KEY_RETURN, REQ_ENTER },
1933 { KEY_UP, REQ_PREVIOUS },
1934 { KEY_DOWN, REQ_NEXT },
1940 * Move cursor one line up.
1942 * Move cursor one line down.
1946 * Move cursor one page up.
1949 * Move cursor one page down.
1951 * Jump to first line.
1953 * Jump to last line.
1955 { 'k', REQ_MOVE_UP },
1956 { 'j', REQ_MOVE_DOWN },
1957 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1958 { KEY_END, REQ_MOVE_LAST_LINE },
1959 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1960 { ' ', REQ_MOVE_PAGE_DOWN },
1961 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1962 { 'b', REQ_MOVE_PAGE_UP },
1963 { '-', REQ_MOVE_PAGE_UP },
1969 * Scroll view one line up.
1971 * Scroll view one line down.
1973 * Scroll view one page up.
1975 * Scroll view one page down.
1977 { KEY_IC, REQ_SCROLL_LINE_UP },
1978 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1979 { 'w', REQ_SCROLL_PAGE_UP },
1980 { 's', REQ_SCROLL_PAGE_DOWN },
1990 * Stop all background loading. This can be useful if you use
1991 * tig(1) in a repository with a long history without limiting
1996 * Toggle line numbers on/off.
1998 * Open prompt. This allows you to specify what git command
2004 { 'z', REQ_STOP_LOADING },
2005 { 'v', REQ_SHOW_VERSION },
2006 { 'r', REQ_SCREEN_REDRAW },
2007 { 'n', REQ_TOGGLE_LINE_NUMBERS },
2008 { ':', REQ_PROMPT },
2010 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
2011 { ERR, REQ_SCREEN_UPDATE },
2013 /* Use the ncurses SIGWINCH handler. */
2014 { KEY_RESIZE, REQ_SCREEN_RESIZE },
2018 get_request(int key)
2022 for (i = 0; i < ARRAY_SIZE(keymap); i++)
2023 if (keymap[i].alias == key)
2024 return keymap[i].request;
2026 return (enum request) key;
2031 * Unicode / UTF-8 handling
2033 * NOTE: Much of the following code for dealing with unicode is derived from
2034 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2035 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2038 /* I've (over)annotated a lot of code snippets because I am not entirely
2039 * confident that the approach taken by this small UTF-8 interface is correct.
2043 unicode_width(unsigned long c)
2046 (c <= 0x115f /* Hangul Jamo */
2049 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2051 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2052 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2053 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2054 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2055 || (c >= 0xffe0 && c <= 0xffe6)
2056 || (c >= 0x20000 && c <= 0x2fffd)
2057 || (c >= 0x30000 && c <= 0x3fffd)))
2063 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2064 * Illegal bytes are set one. */
2065 static const unsigned char utf8_bytes[256] = {
2066 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,
2067 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,
2068 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,
2069 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,
2070 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,
2071 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,
2072 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,
2073 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,
2076 /* Decode UTF-8 multi-byte representation into a unicode character. */
2077 static inline unsigned long
2078 utf8_to_unicode(const char *string, size_t length)
2080 unsigned long unicode;
2084 unicode = string[0];
2087 unicode = (string[0] & 0x1f) << 6;
2088 unicode += (string[1] & 0x3f);
2091 unicode = (string[0] & 0x0f) << 12;
2092 unicode += ((string[1] & 0x3f) << 6);
2093 unicode += (string[2] & 0x3f);
2096 unicode = (string[0] & 0x0f) << 18;
2097 unicode += ((string[1] & 0x3f) << 12);
2098 unicode += ((string[2] & 0x3f) << 6);
2099 unicode += (string[3] & 0x3f);
2102 unicode = (string[0] & 0x0f) << 24;
2103 unicode += ((string[1] & 0x3f) << 18);
2104 unicode += ((string[2] & 0x3f) << 12);
2105 unicode += ((string[3] & 0x3f) << 6);
2106 unicode += (string[4] & 0x3f);
2109 unicode = (string[0] & 0x01) << 30;
2110 unicode += ((string[1] & 0x3f) << 24);
2111 unicode += ((string[2] & 0x3f) << 18);
2112 unicode += ((string[3] & 0x3f) << 12);
2113 unicode += ((string[4] & 0x3f) << 6);
2114 unicode += (string[5] & 0x3f);
2117 die("Invalid unicode length");
2120 /* Invalid characters could return the special 0xfffd value but NUL
2121 * should be just as good. */
2122 return unicode > 0xffff ? 0 : unicode;
2125 /* Calculates how much of string can be shown within the given maximum width
2126 * and sets trimmed parameter to non-zero value if all of string could not be
2129 * Additionally, adds to coloffset how many many columns to move to align with
2130 * the expected position. Takes into account how multi-byte and double-width
2131 * characters will effect the cursor position.
2133 * Returns the number of bytes to output from string to satisfy max_width. */
2135 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
2137 const char *start = string;
2138 const char *end = strchr(string, '\0');
2144 while (string < end) {
2145 int c = *(unsigned char *) string;
2146 unsigned char bytes = utf8_bytes[c];
2148 unsigned long unicode;
2150 if (string + bytes > end)
2153 /* Change representation to figure out whether
2154 * it is a single- or double-width character. */
2156 unicode = utf8_to_unicode(string, bytes);
2157 /* FIXME: Graceful handling of invalid unicode character. */
2161 ucwidth = unicode_width(unicode);
2163 if (width > max_width) {
2168 /* The column offset collects the differences between the
2169 * number of bytes encoding a character and the number of
2170 * columns will be used for rendering said character.
2172 * So if some character A is encoded in 2 bytes, but will be
2173 * represented on the screen using only 1 byte this will and up
2174 * adding 1 to the multi-byte column offset.
2176 * Assumes that no double-width character can be encoding in
2177 * less than two bytes. */
2178 if (bytes > ucwidth)
2179 mbwidth += bytes - ucwidth;
2184 *coloffset += mbwidth;
2186 return string - start;
2194 /* Whether or not the curses interface has been initialized. */
2195 static bool cursed = FALSE;
2197 /* The status window is used for polling keystrokes. */
2198 static WINDOW *status_win;
2200 /* Update status and title window. */
2202 report(const char *msg, ...)
2204 static bool empty = TRUE;
2205 struct view *view = display[current_view];
2207 if (!empty || *msg) {
2210 va_start(args, msg);
2213 wmove(status_win, 0, 0);
2215 vwprintw(status_win, msg, args);
2220 wrefresh(status_win);
2225 update_view_title(view);
2226 update_display_cursor();
2229 /* Controls when nodelay should be in effect when polling user input. */
2231 set_nonblocking_input(bool loading)
2233 static unsigned int loading_views;
2235 if ((loading == FALSE && loading_views-- == 1) ||
2236 (loading == TRUE && loading_views++ == 0))
2237 nodelay(status_win, loading);
2245 /* Initialize the curses library */
2246 if (isatty(STDIN_FILENO)) {
2247 cursed = !!initscr();
2249 /* Leave stdin and stdout alone when acting as a pager. */
2250 FILE *io = fopen("/dev/tty", "r+");
2252 cursed = !!newterm(NULL, io, io);
2256 die("Failed to initialize curses");
2258 nonl(); /* Tell curses not to do NL->CR/NL on output */
2259 cbreak(); /* Take input chars one at a time, no wait for \n */
2260 noecho(); /* Don't echo input */
2261 leaveok(stdscr, TRUE);
2266 getmaxyx(stdscr, y, x);
2267 status_win = newwin(1, 0, y - 1, 0);
2269 die("Failed to create status window");
2271 /* Enable keyboard mapping */
2272 keypad(status_win, TRUE);
2273 wbkgdset(status_win, get_line_attr(LINE_STATUS));
2278 * Repository references
2281 static struct ref *refs;
2282 static size_t refs_size;
2284 /* Id <-> ref store */
2285 static struct ref ***id_refs;
2286 static size_t id_refs_size;
2288 static struct ref **
2291 struct ref ***tmp_id_refs;
2292 struct ref **ref_list = NULL;
2293 size_t ref_list_size = 0;
2296 for (i = 0; i < id_refs_size; i++)
2297 if (!strcmp(id, id_refs[i][0]->id))
2300 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
2304 id_refs = tmp_id_refs;
2306 for (i = 0; i < refs_size; i++) {
2309 if (strcmp(id, refs[i].id))
2312 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
2320 if (ref_list_size > 0)
2321 ref_list[ref_list_size - 1]->next = 1;
2322 ref_list[ref_list_size] = &refs[i];
2324 /* XXX: The properties of the commit chains ensures that we can
2325 * safely modify the shared ref. The repo references will
2326 * always be similar for the same id. */
2327 ref_list[ref_list_size]->next = 0;
2332 id_refs[id_refs_size++] = ref_list;
2338 read_ref(char *id, int idlen, char *name, int namelen)
2342 bool tag_commit = FALSE;
2344 /* Commits referenced by tags has "^{}" appended. */
2345 if (name[namelen - 1] == '}') {
2346 while (namelen > 0 && name[namelen] != '^')
2353 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
2356 name += STRING_SIZE("refs/tags/");
2359 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
2360 name += STRING_SIZE("refs/heads/");
2362 } else if (!strcmp(name, "HEAD")) {
2366 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
2370 ref = &refs[refs_size++];
2371 ref->name = strdup(name);
2376 string_copy(ref->id, id);
2384 const char *cmd_env = getenv("TIG_LS_REMOTE");
2385 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
2387 return read_properties(cmd, '\t', read_ref);
2391 read_config_option(char *name, int namelen, char *value, int valuelen)
2393 if (!strcmp(name, "i18n.commitencoding")) {
2394 string_copy(opt_encoding, value);
2403 return read_properties("git repo-config --list", '=',
2404 read_config_option);
2408 read_properties(const char *cmd, int separator,
2409 int (*read_property)(char *, int, char *, int))
2411 FILE *pipe = popen(cmd, "r");
2412 char buffer[BUFSIZ];
2419 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
2420 char *value = strchr(name, separator);
2425 namelen = value - name;
2427 valuelen = strlen(value);
2430 value[valuelen] = 0;
2434 namelen = strlen(name);
2440 state = read_property(name, namelen, value, valuelen);
2443 if (state != ERR && ferror(pipe))
2457 #define __NORETURN __attribute__((__noreturn__))
2462 static void __NORETURN
2465 /* XXX: Restore tty modes and let the OS cleanup the rest! */
2471 static void __NORETURN
2472 die(const char *err, ...)
2478 va_start(args, err);
2479 fputs("tig: ", stderr);
2480 vfprintf(stderr, err, args);
2481 fputs("\n", stderr);
2488 main(int argc, char *argv[])
2491 enum request request;
2494 signal(SIGINT, quit);
2496 /* Load the repo config file first so options can be overwritten from
2497 * the command line. */
2498 if (load_config() == ERR)
2499 die("Failed to load repo config.");
2501 if (!parse_options(argc, argv))
2504 if (load_refs() == ERR)
2505 die("Failed to load refs.");
2507 /* Require a git repository unless when running in pager mode. */
2508 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
2509 die("Not a git repository");
2511 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
2512 view->cmd_env = getenv(view->cmd_env);
2514 request = opt_request;
2518 while (view_driver(display[current_view], request)) {
2522 foreach_view (view, i)
2525 /* Refresh, accept single keystroke of input */
2526 key = wgetch(status_win);
2527 request = get_request(key);
2529 /* Some low-level request handling. This keeps access to
2530 * status_win restricted. */
2534 /* Temporarily switch to line-oriented and echoed
2539 if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
2540 memcpy(opt_cmd, "git ", 4);
2541 opt_request = REQ_VIEW_PAGER;
2550 case REQ_SCREEN_RESIZE:
2554 getmaxyx(stdscr, height, width);
2556 /* Resize the status view and let the view driver take
2557 * care of resizing the displayed views. */
2558 wresize(status_win, 1, width);
2559 mvwin(status_win, height - 1, 0);
2560 wrefresh(status_win);
2575 * Revision specification
2576 * ----------------------
2577 * This section describes various ways to specify what revisions to display
2578 * or otherwise limit the view to. tig(1) does not itself parse the described
2579 * revision options so refer to the relevant git man pages for futher
2580 * information. Relevant man pages besides git-log(1) are git-diff(1) and
2583 * You can tune the interaction with git by making use of the options
2584 * explained in this section. For example, by configuring the environment
2585 * variables described in the <<history-commands, "History commands">>
2588 * Limit by path name
2589 * ~~~~~~~~~~~~~~~~~~
2590 * If you are interested only in those revisions that made changes to a
2591 * specific file (or even several files) list the files like this:
2593 * $ tig log Makefile README
2595 * To avoid ambiguity with repository references such as tag name, be sure
2596 * to separate file names from other git options using "\--". So if you
2597 * have a file named 'master' it will clash with the reference named
2598 * 'master', and thus you will have to use:
2600 * $ tig log -- master
2602 * NOTE: For the main view, avoiding ambiguity will in some cases require
2603 * you to specify two "\--" options. The first will make tig(1) stop
2604 * option processing and the latter will be passed to git log.
2606 * Limit by date or number
2607 * ~~~~~~~~~~~~~~~~~~~~~~~
2608 * To speed up interaction with git, you can limit the amount of commits
2609 * to show both for the log and main view. Either limit by date using
2610 * e.g. `--since=1.month` or limit by the number of commits using `-n400`.
2612 * If you are only interested in changed that happened between two dates
2615 * $ tig -- --after="May 5th" --before="2006-05-16 15:44"
2617 * NOTE: If you want to avoid having to quote dates containing spaces you
2618 * can use "." instead, e.g. `--after=May.5th`.
2620 * Limiting by commit ranges
2621 * ~~~~~~~~~~~~~~~~~~~~~~~~~
2622 * Alternatively, commits can be limited to a specific range, such as
2623 * "all commits between 'tag-1.0' and 'tag-2.0'". For example:
2625 * $ tig log tag-1.0..tag-2.0
2627 * This way of commit limiting makes it trivial to only browse the commits
2628 * which haven't been pushed to a remote branch. Assuming 'origin' is your
2629 * upstream remote branch, using:
2631 * $ tig log origin..HEAD
2633 * will list what will be pushed to the remote branch. Optionally, the ending
2634 * 'HEAD' can be left out since it is implied.
2636 * Limiting by reachability
2637 * ~~~~~~~~~~~~~~~~~~~~~~~~
2638 * Git interprets the range specifier "tag-1.0..tag-2.0" as
2639 * "all commits reachable from 'tag-2.0' but not from 'tag-1.0'".
2640 * Where reachability refers to what commits are ancestors (or part of the
2641 * history) of the branch or tagged revision in question.
2643 * If you prefer to specify which commit to preview in this way use the
2646 * $ tig log tag-2.0 ^tag-1.0
2648 * You can think of '^' as a negation operator. Using this alternate syntax,
2649 * it is possible to further prune commits by specifying multiple branch
2652 * Combining revisions specification
2653 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2654 * Revisions options can to some degree be combined, which makes it possible
2655 * to say "show at most 20 commits from within the last month that changed
2656 * files under the Documentation/ directory."
2658 * $ tig -- --since=1.month -n20 -- Documentation/
2660 * Examining all repository references
2661 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2662 * In some cases, it can be useful to query changes across all references
2663 * in a repository. An example is to ask "did any line of development in
2664 * this repository change a particular file within the last week". This
2665 * can be accomplished using:
2667 * $ tig -- --all --since=1.week -- Makefile
2671 * Known bugs and problems:
2673 * - In it's current state tig is pretty much UTF-8 only.
2675 * - If the screen width is very small the main view can draw
2676 * outside the current view causing bad wrapping. Same goes
2677 * for title and status windows.
2679 * - The cursor can wrap-around on the last line and cause the
2684 * Features that should be explored.
2692 * Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
2694 * This program is free software; you can redistribute it and/or modify
2695 * it under the terms of the GNU General Public License as published by
2696 * the Free Software Foundation; either version 2 of the License, or
2697 * (at your option) any later version.
2701 * - link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)],
2702 * - link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)]
2704 * Other git repository browsers: