1 /* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
15 #define VERSION "tig-0.3"
36 #define __NORETURN __attribute__((__noreturn__))
41 static void __NORETURN die(const char *err, ...);
42 static void report(const char *msg, ...);
43 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
44 static void set_nonblocking_input(bool loading);
45 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
46 static void load_help_page(void);
48 #define ABS(x) ((x) >= 0 ? (x) : -(x))
49 #define MIN(x, y) ((x) < (y) ? (x) : (y))
51 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
52 #define STRING_SIZE(x) (sizeof(x) - 1)
54 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
55 #define SIZEOF_CMD 1024 /* Size of command buffer. */
56 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
58 /* This color name can be used to refer to the default term colors. */
59 #define COLOR_DEFAULT (-1)
61 /* The format and size of the date column in the main view. */
62 #define DATE_FORMAT "%Y-%m-%d %H:%M"
63 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
65 #define AUTHOR_COLS 20
67 /* The default interval between line numbers. */
68 #define NUMBER_INTERVAL 1
72 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
74 #define TIG_LS_REMOTE \
75 "git ls-remote . 2>/dev/null"
77 #define TIG_DIFF_CMD \
78 "git show --patch-with-stat --find-copies-harder -B -C %s"
81 "git log --cc --stat -n100 %s"
83 #define TIG_MAIN_CMD \
84 "git log --topo-order --stat --pretty=raw %s"
86 /* XXX: Needs to be defined to the empty string. */
87 #define TIG_HELP_CMD ""
88 #define TIG_PAGER_CMD ""
90 /* Some ascii-shorthands fitted into the ncurses namespace. */
92 #define KEY_RETURN '\r'
97 char *name; /* Ref name; tag or head names are shortened. */
98 char id[41]; /* Commit SHA1 ID */
99 unsigned int tag:1; /* Is it a tag? */
100 unsigned int next:1; /* For ref lists: are there more refs? */
103 static struct ref **get_refs(char *id);
112 set_from_int_map(struct int_map *map, size_t map_size,
113 int *value, const char *name, int namelen)
118 for (i = 0; i < map_size; i++)
119 if (namelen == map[i].namelen &&
120 !strncasecmp(name, map[i].name, namelen)) {
121 *value = map[i].value;
134 string_ncopy(char *dst, const char *src, int dstlen)
136 strncpy(dst, src, dstlen - 1);
141 /* Shorthand for safely copying into a fixed buffer. */
142 #define string_copy(dst, src) \
143 string_ncopy(dst, src, sizeof(dst))
146 chomp_string(char *name)
150 while (isspace(*name))
153 namelen = strlen(name) - 1;
154 while (namelen > 0 && isspace(name[namelen]))
161 string_nformat(char *buf, size_t bufsize, int *bufpos, const char *fmt, ...)
164 int pos = bufpos ? *bufpos : 0;
167 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
173 return pos >= bufsize ? FALSE : TRUE;
176 #define string_format(buf, fmt, args...) \
177 string_nformat(buf, sizeof(buf), NULL, fmt, args)
179 #define string_format_from(buf, from, fmt, args...) \
180 string_nformat(buf, sizeof(buf), from, fmt, args)
184 * NOTE: The following is a slightly modified copy of the git project's shell
185 * quoting routines found in the quote.c file.
187 * Help to copy the thing properly quoted for the shell safety. any single
188 * quote is replaced with '\'', any exclamation point is replaced with '\!',
189 * and the whole thing is enclosed in a
192 * original sq_quote result
193 * name ==> name ==> 'name'
194 * a b ==> a b ==> 'a b'
195 * a'b ==> a'\''b ==> 'a'\''b'
196 * a!b ==> a'\!'b ==> 'a'\!'b'
200 sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
204 #define BUFPUT(x) do { if (bufsize < SIZEOF_CMD) buf[bufsize++] = (x); } while (0)
207 while ((c = *src++)) {
208 if (c == '\'' || c == '!') {
228 /* XXX: Keep the view request first and in sync with views[]. */ \
229 REQ_GROUP("View switching") \
230 REQ_(VIEW_MAIN, "Show main view"), \
231 REQ_(VIEW_DIFF, "Show diff view"), \
232 REQ_(VIEW_LOG, "Show log view"), \
233 REQ_(VIEW_HELP, "Show help page"), \
234 REQ_(VIEW_PAGER, "Show pager view"), \
236 REQ_GROUP("View manipulation") \
237 REQ_(ENTER, "Enter current line and scroll"), \
238 REQ_(NEXT, "Move to next"), \
239 REQ_(PREVIOUS, "Move to previous"), \
240 REQ_(VIEW_NEXT, "Move focus to next view"), \
241 REQ_(VIEW_CLOSE, "Close the current view"), \
242 REQ_(QUIT, "Close all views and quit"), \
244 REQ_GROUP("Cursor navigation") \
245 REQ_(MOVE_UP, "Move cursor one line up"), \
246 REQ_(MOVE_DOWN, "Move cursor one line down"), \
247 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
248 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
249 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
250 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
252 REQ_GROUP("Scrolling") \
253 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
254 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
255 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
256 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
259 REQ_(PROMPT, "Bring up the prompt"), \
260 REQ_(SCREEN_UPDATE, "Update the screen"), \
261 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
262 REQ_(SCREEN_RESIZE, "Resize the screen"), \
263 REQ_(SHOW_VERSION, "Show version information"), \
264 REQ_(STOP_LOADING, "Stop all loading views"), \
265 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
266 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"),
269 /* User action requests. */
271 #define REQ_GROUP(help)
272 #define REQ_(req, help) REQ_##req
274 /* Offset all requests to avoid conflicts with ncurses getch values. */
275 REQ_OFFSET = KEY_MAX + 1,
282 struct request_info {
283 enum request request;
287 static struct request_info req_info[] = {
288 #define REQ_GROUP(help) { 0, (help) },
289 #define REQ_(req, help) { REQ_##req, (help) }
299 static const char usage[] =
300 VERSION " (" __DATE__ ")\n"
302 "Usage: tig [options]\n"
303 " or: tig [options] [--] [git log options]\n"
304 " or: tig [options] log [git log options]\n"
305 " or: tig [options] diff [git diff options]\n"
306 " or: tig [options] show [git show options]\n"
307 " or: tig [options] < [git command output]\n"
310 " -l Start up in log view\n"
311 " -d Start up in diff view\n"
312 " -n[I], --line-number[=I] Show line numbers with given interval\n"
313 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
314 " -- Mark end of tig options\n"
315 " -v, --version Show version and exit\n"
316 " -h, --help Show help message and exit\n";
318 /* Option and state variables. */
319 static bool opt_line_number = FALSE;
320 static bool opt_rev_graph = TRUE;
321 static int opt_num_interval = NUMBER_INTERVAL;
322 static int opt_tab_size = TABSIZE;
323 static enum request opt_request = REQ_VIEW_MAIN;
324 static char opt_cmd[SIZEOF_CMD] = "";
325 static char opt_encoding[20] = "";
326 static bool opt_utf8 = TRUE;
327 static FILE *opt_pipe = NULL;
335 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
345 int namelen = strlen(name);
349 if (strncmp(opt, name, namelen))
352 if (opt[namelen] == '=')
353 value = opt + namelen + 1;
356 if (!short_name || opt[1] != short_name)
361 va_start(args, type);
362 if (type == OPT_INT) {
363 number = va_arg(args, int *);
365 *number = atoi(value);
372 /* Returns the index of log or diff command or -1 to exit. */
374 parse_options(int argc, char *argv[])
378 for (i = 1; i < argc; i++) {
381 if (!strcmp(opt, "-l")) {
382 opt_request = REQ_VIEW_LOG;
386 if (!strcmp(opt, "-d")) {
387 opt_request = REQ_VIEW_DIFF;
391 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
392 opt_line_number = TRUE;
396 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
397 opt_tab_size = MIN(opt_tab_size, TABSIZE);
401 if (check_option(opt, 'v', "version", OPT_NONE)) {
402 printf("tig version %s\n", VERSION);
406 if (check_option(opt, 'h', "help", OPT_NONE)) {
411 if (!strcmp(opt, "--")) {
416 if (!strcmp(opt, "log") ||
417 !strcmp(opt, "diff") ||
418 !strcmp(opt, "show")) {
419 opt_request = opt[0] == 'l'
420 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
424 if (opt[0] && opt[0] != '-')
427 die("unknown option '%s'\n\n%s", opt, usage);
430 if (!isatty(STDIN_FILENO)) {
431 opt_request = REQ_VIEW_PAGER;
434 } else if (i < argc) {
437 if (opt_request == REQ_VIEW_MAIN)
438 /* XXX: This is vulnerable to the user overriding
439 * options required for the main view parser. */
440 string_copy(opt_cmd, "git log --stat --pretty=raw");
442 string_copy(opt_cmd, "git");
443 buf_size = strlen(opt_cmd);
445 while (buf_size < sizeof(opt_cmd) && i < argc) {
446 opt_cmd[buf_size++] = ' ';
447 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
450 if (buf_size >= sizeof(opt_cmd))
451 die("command too long");
453 opt_cmd[buf_size] = 0;
457 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
465 * Line-oriented content detection.
469 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
470 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
471 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
472 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
473 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
474 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
475 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
476 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
477 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
478 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
479 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
480 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
481 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
482 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
483 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
484 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
485 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
486 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
487 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
488 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
489 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
490 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
491 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
492 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
493 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
494 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
495 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
496 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
497 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
498 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
499 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
500 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
501 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
502 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
503 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
504 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
505 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
506 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
509 #define LINE(type, line, fg, bg, attr) \
516 const char *name; /* Option name. */
517 int namelen; /* Size of option name. */
518 const char *line; /* The start of line to match. */
519 int linelen; /* Size of string to match. */
520 int fg, bg, attr; /* Color and text attributes for the lines. */
523 static struct line_info line_info[] = {
524 #define LINE(type, line, fg, bg, attr) \
525 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
530 static enum line_type
531 get_line_type(char *line)
533 int linelen = strlen(line);
536 for (type = 0; type < ARRAY_SIZE(line_info); type++)
537 /* Case insensitive search matches Signed-off-by lines better. */
538 if (linelen >= line_info[type].linelen &&
539 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
546 get_line_attr(enum line_type type)
548 assert(type < ARRAY_SIZE(line_info));
549 return COLOR_PAIR(type) | line_info[type].attr;
552 static struct line_info *
553 get_line_info(char *name, int namelen)
558 /* Diff-Header -> DIFF_HEADER */
559 for (i = 0; i < namelen; i++) {
562 else if (name[i] == '.')
566 for (type = 0; type < ARRAY_SIZE(line_info); type++)
567 if (namelen == line_info[type].namelen &&
568 !strncasecmp(line_info[type].name, name, namelen))
569 return &line_info[type];
577 int default_bg = COLOR_BLACK;
578 int default_fg = COLOR_WHITE;
583 if (use_default_colors() != ERR) {
588 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
589 struct line_info *info = &line_info[type];
590 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
591 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
593 init_pair(type, fg, bg);
599 void *data; /* User data */
604 * User config file handling.
607 static struct int_map color_map[] = {
608 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
620 #define set_color(color, name, namelen) \
621 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, namelen)
623 static struct int_map attr_map[] = {
624 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
634 #define set_attribute(attr, name, namelen) \
635 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, namelen)
637 static int config_lineno;
638 static bool config_errors;
639 static char *config_msg;
642 set_option(char *opt, int optlen, char *value, int valuelen)
644 /* Reads: "color" object fgcolor bgcolor [attr] */
645 if (!strcmp(opt, "color")) {
646 struct line_info *info;
648 value = chomp_string(value);
649 valuelen = strcspn(value, " \t");
650 info = get_line_info(value, valuelen);
652 config_msg = "Unknown color name";
656 value = chomp_string(value + valuelen);
657 valuelen = strcspn(value, " \t");
658 if (set_color(&info->fg, value, valuelen) == ERR) {
659 config_msg = "Unknown color";
663 value = chomp_string(value + valuelen);
664 valuelen = strcspn(value, " \t");
665 if (set_color(&info->bg, value, valuelen) == ERR) {
666 config_msg = "Unknown color";
670 value = chomp_string(value + valuelen);
672 set_attribute(&info->attr, value, strlen(value)) == ERR) {
673 config_msg = "Unknown attribute";
684 read_option(char *opt, int optlen, char *value, int valuelen)
687 config_msg = "Internal error";
689 optlen = strcspn(opt, "#;");
691 /* The whole line is a commend or empty. */
694 } else if (opt[optlen] != 0) {
695 /* Part of the option name is a comment, so the value part
696 * should be ignored. */
698 opt[optlen] = value[valuelen] = 0;
700 /* Else look for comment endings in the value. */
701 valuelen = strcspn(value, "#;");
705 if (set_option(opt, optlen, value, valuelen) == ERR) {
706 fprintf(stderr, "Error on line %d, near '%.*s' option: %s\n",
707 config_lineno, optlen, opt, config_msg);
708 config_errors = TRUE;
711 /* Always keep going if errors are encountered. */
718 char *home = getenv("HOME");
723 config_errors = FALSE;
725 if (!home || !string_format(buf, "%s/.tigrc", home))
728 /* It's ok that the file doesn't exist. */
729 file = fopen(buf, "r");
733 if (read_properties(file, " \t", read_option) == ERR ||
734 config_errors == TRUE)
735 fprintf(stderr, "Errors while loading %s.\n", buf);
748 /* The display array of active views and the index of the current view. */
749 static struct view *display[2];
750 static unsigned int current_view;
752 #define foreach_view(view, i) \
753 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
755 #define displayed_views() (display[1] != NULL ? 2 : 1)
757 /* Current head and commit ID */
758 static char ref_commit[SIZEOF_REF] = "HEAD";
759 static char ref_head[SIZEOF_REF] = "HEAD";
762 const char *name; /* View name */
763 const char *cmd_fmt; /* Default command line format */
764 const char *cmd_env; /* Command line set via environment */
765 const char *id; /* Points to either of ref_{head,commit} */
767 struct view_ops *ops; /* View operations */
769 char cmd[SIZEOF_CMD]; /* Command buffer */
770 char ref[SIZEOF_REF]; /* Hovered commit reference */
771 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
773 int height, width; /* The width and height of the main window */
774 WINDOW *win; /* The main window */
775 WINDOW *title; /* The title window living below the main window */
778 unsigned long offset; /* Offset of the window top */
779 unsigned long lineno; /* Current line number */
781 /* If non-NULL, points to the view that opened this view. If this view
782 * is closed tig will switch back to the parent view. */
786 unsigned long lines; /* Total number of lines */
787 struct line *line; /* Line index */
788 unsigned long line_size;/* Total number of allocated lines */
789 unsigned int digits; /* Number of digits in the lines member. */
797 /* What type of content being displayed. Used in the title bar. */
799 /* Draw one line; @lineno must be < view->height. */
800 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
801 /* Read one line; updates view->line. */
802 bool (*read)(struct view *view, char *data);
803 /* Depending on view, change display based on current line. */
804 bool (*enter)(struct view *view, struct line *line);
807 static struct view_ops pager_ops;
808 static struct view_ops main_ops;
810 #define VIEW_STR(name, cmd, env, ref, ops) \
811 { name, cmd, #env, ref, ops }
813 #define VIEW_(id, name, ops, ref) \
814 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops)
817 static struct view views[] = {
818 VIEW_(MAIN, "main", &main_ops, ref_head),
819 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
820 VIEW_(LOG, "log", &pager_ops, ref_head),
821 VIEW_(HELP, "help", &pager_ops, "static"),
822 VIEW_(PAGER, "pager", &pager_ops, "static"),
825 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
829 draw_view_line(struct view *view, unsigned int lineno)
831 if (view->offset + lineno >= view->lines)
834 return view->ops->draw(view, &view->line[view->offset + lineno], lineno);
838 redraw_view_from(struct view *view, int lineno)
840 assert(0 <= lineno && lineno < view->height);
842 for (; lineno < view->height; lineno++) {
843 if (!draw_view_line(view, lineno))
847 redrawwin(view->win);
852 redraw_view(struct view *view)
855 redraw_view_from(view, 0);
860 update_view_title(struct view *view)
862 if (view == display[current_view])
863 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
865 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
868 wmove(view->title, 0, 0);
871 wprintw(view->title, "[%s] %s", view->name, view->ref);
873 wprintw(view->title, "[%s]", view->name);
875 if (view->lines || view->pipe) {
876 unsigned int view_lines = view->offset + view->height;
877 unsigned int lines = view->lines
878 ? MIN(view_lines, view->lines) * 100 / view->lines
881 wprintw(view->title, " - %s %d of %d (%d%%)",
889 time_t secs = time(NULL) - view->start_time;
891 /* Three git seconds are a long time ... */
893 wprintw(view->title, " %lds", secs);
896 wmove(view->title, 0, view->width - 1);
897 wrefresh(view->title);
904 struct view *base = display[0];
905 struct view *view = display[1] ? display[1] : display[0];
907 /* Setup window dimensions */
909 getmaxyx(stdscr, base->height, base->width);
911 /* Make room for the status window. */
915 /* Horizontal split. */
916 view->width = base->width;
917 view->height = SCALE_SPLIT_VIEW(base->height);
918 base->height -= view->height;
920 /* Make room for the title bar. */
924 /* Make room for the title bar. */
929 foreach_view (view, i) {
931 view->win = newwin(view->height, 0, offset, 0);
933 die("Failed to create %s view", view->name);
935 scrollok(view->win, TRUE);
937 view->title = newwin(1, 0, offset + view->height, 0);
939 die("Failed to create title window");
942 wresize(view->win, view->height, view->width);
943 mvwin(view->win, offset, 0);
944 mvwin(view->title, offset + view->height, 0);
947 offset += view->height + 1;
957 foreach_view (view, i) {
959 update_view_title(view);
964 update_display_cursor(void)
966 struct view *view = display[current_view];
968 /* Move the cursor to the right-most column of the cursor line.
970 * XXX: This could turn out to be a bit expensive, but it ensures that
971 * the cursor does not jump around. */
973 wmove(view->win, view->lineno - view->offset, view->width - 1);
982 /* Scrolling backend */
984 do_scroll_view(struct view *view, int lines, bool redraw)
986 /* The rendering expects the new offset. */
987 view->offset += lines;
989 assert(0 <= view->offset && view->offset < view->lines);
992 /* Redraw the whole screen if scrolling is pointless. */
993 if (view->height < ABS(lines)) {
997 int line = lines > 0 ? view->height - lines : 0;
998 int end = line + ABS(lines);
1000 wscrl(view->win, lines);
1002 for (; line < end; line++) {
1003 if (!draw_view_line(view, line))
1008 /* Move current line into the view. */
1009 if (view->lineno < view->offset) {
1010 view->lineno = view->offset;
1011 draw_view_line(view, 0);
1013 } else if (view->lineno >= view->offset + view->height) {
1014 if (view->lineno == view->offset + view->height) {
1015 /* Clear the hidden line so it doesn't show if the view
1016 * is scrolled up. */
1017 wmove(view->win, view->height, 0);
1018 wclrtoeol(view->win);
1020 view->lineno = view->offset + view->height - 1;
1021 draw_view_line(view, view->lineno - view->offset);
1024 assert(view->offset <= view->lineno && view->lineno < view->lines);
1029 redrawwin(view->win);
1030 wrefresh(view->win);
1034 /* Scroll frontend */
1036 scroll_view(struct view *view, enum request request)
1041 case REQ_SCROLL_PAGE_DOWN:
1042 lines = view->height;
1043 case REQ_SCROLL_LINE_DOWN:
1044 if (view->offset + lines > view->lines)
1045 lines = view->lines - view->offset;
1047 if (lines == 0 || view->offset + view->height >= view->lines) {
1048 report("Cannot scroll beyond the last line");
1053 case REQ_SCROLL_PAGE_UP:
1054 lines = view->height;
1055 case REQ_SCROLL_LINE_UP:
1056 if (lines > view->offset)
1057 lines = view->offset;
1060 report("Cannot scroll beyond the first line");
1068 die("request %d not handled in switch", request);
1071 do_scroll_view(view, lines, TRUE);
1076 move_view(struct view *view, enum request request, bool redraw)
1081 case REQ_MOVE_FIRST_LINE:
1082 steps = -view->lineno;
1085 case REQ_MOVE_LAST_LINE:
1086 steps = view->lines - view->lineno - 1;
1089 case REQ_MOVE_PAGE_UP:
1090 steps = view->height > view->lineno
1091 ? -view->lineno : -view->height;
1094 case REQ_MOVE_PAGE_DOWN:
1095 steps = view->lineno + view->height >= view->lines
1096 ? view->lines - view->lineno - 1 : view->height;
1108 die("request %d not handled in switch", request);
1111 if (steps <= 0 && view->lineno == 0) {
1112 report("Cannot move beyond the first line");
1115 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1116 report("Cannot move beyond the last line");
1120 /* Move the current line */
1121 view->lineno += steps;
1122 assert(0 <= view->lineno && view->lineno < view->lines);
1124 /* Repaint the old "current" line if we be scrolling */
1125 if (ABS(steps) < view->height) {
1126 int prev_lineno = view->lineno - steps - view->offset;
1128 wmove(view->win, prev_lineno, 0);
1129 wclrtoeol(view->win);
1130 draw_view_line(view, prev_lineno);
1133 /* Check whether the view needs to be scrolled */
1134 if (view->lineno < view->offset ||
1135 view->lineno >= view->offset + view->height) {
1136 if (steps < 0 && -steps > view->offset) {
1137 steps = -view->offset;
1139 } else if (steps > 0) {
1140 if (view->lineno == view->lines - 1 &&
1141 view->lines > view->height) {
1142 steps = view->lines - view->offset - 1;
1143 if (steps >= view->height)
1144 steps -= view->height - 1;
1148 do_scroll_view(view, steps, redraw);
1152 /* Draw the current line */
1153 draw_view_line(view, view->lineno - view->offset);
1158 redrawwin(view->win);
1159 wrefresh(view->win);
1165 * Incremental updating
1169 end_update(struct view *view)
1173 set_nonblocking_input(FALSE);
1174 if (view->pipe == stdin)
1182 begin_update(struct view *view)
1184 const char *id = view->id;
1190 string_copy(view->cmd, opt_cmd);
1192 /* When running random commands, the view ref could have become
1193 * invalid so clear it. */
1196 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1198 if (!string_format(view->cmd, format, id, id, id, id, id))
1202 /* Special case for the pager view. */
1204 view->pipe = opt_pipe;
1207 view->pipe = popen(view->cmd, "r");
1213 set_nonblocking_input(TRUE);
1218 string_copy(view->vid, id);
1223 for (i = 0; i < view->lines; i++)
1224 if (view->line[i].data)
1225 free(view->line[i].data);
1231 view->start_time = time(NULL);
1236 static struct line *
1237 realloc_lines(struct view *view, size_t line_size)
1239 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1245 view->line_size = line_size;
1250 update_view(struct view *view)
1252 char buffer[BUFSIZ];
1254 /* The number of lines to read. If too low it will cause too much
1255 * redrawing (and possible flickering), if too high responsiveness
1257 unsigned long lines = view->height;
1258 int redraw_from = -1;
1263 /* Only redraw if lines are visible. */
1264 if (view->offset + view->height >= view->lines)
1265 redraw_from = view->lines - view->offset;
1267 if (!realloc_lines(view, view->lines + lines))
1270 while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
1271 int linelen = strlen(line);
1274 line[linelen - 1] = 0;
1276 if (!view->ops->read(view, line))
1286 lines = view->lines;
1287 for (digits = 0; lines; digits++)
1290 /* Keep the displayed view in sync with line number scaling. */
1291 if (digits != view->digits) {
1292 view->digits = digits;
1297 if (redraw_from >= 0) {
1298 /* If this is an incremental update, redraw the previous line
1299 * since for commits some members could have changed when
1300 * loading the main view. */
1301 if (redraw_from > 0)
1304 /* Incrementally draw avoids flickering. */
1305 redraw_view_from(view, redraw_from);
1308 /* Update the title _after_ the redraw so that if the redraw picks up a
1309 * commit reference in view->ref it'll be available here. */
1310 update_view_title(view);
1312 if (ferror(view->pipe)) {
1313 report("Failed to read: %s", strerror(errno));
1316 } else if (feof(view->pipe)) {
1324 report("Allocation failure");
1332 OPEN_DEFAULT = 0, /* Use default view switching. */
1333 OPEN_SPLIT = 1, /* Split current view. */
1334 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1335 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1339 open_view(struct view *prev, enum request request, enum open_flags flags)
1341 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1342 bool split = !!(flags & OPEN_SPLIT);
1343 bool reload = !!(flags & OPEN_RELOAD);
1344 struct view *view = VIEW(request);
1345 int nviews = displayed_views();
1346 struct view *base_view = display[0];
1348 if (view == prev && nviews == 1 && !reload) {
1349 report("Already in %s view", view->name);
1353 if (view == VIEW(REQ_VIEW_HELP)) {
1356 } else if ((reload || strcmp(view->vid, view->id)) &&
1357 !begin_update(view)) {
1358 report("Failed to load %s view", view->name);
1367 /* Maximize the current view. */
1368 memset(display, 0, sizeof(display));
1370 display[current_view] = view;
1373 /* Resize the view when switching between split- and full-screen,
1374 * or when switching between two different full-screen views. */
1375 if (nviews != displayed_views() ||
1376 (nviews == 1 && base_view != display[0]))
1379 if (split && prev->lineno - prev->offset >= prev->height) {
1380 /* Take the title line into account. */
1381 int lines = prev->lineno - prev->offset - prev->height + 1;
1383 /* Scroll the view that was split if the current line is
1384 * outside the new limited view. */
1385 do_scroll_view(prev, lines, TRUE);
1388 if (prev && view != prev) {
1389 if (split && !backgrounded) {
1390 /* "Blur" the previous view. */
1391 update_view_title(prev);
1394 view->parent = prev;
1397 if (view->pipe && view->lines == 0) {
1398 /* Clear the old view and let the incremental updating refill
1407 /* If the view is backgrounded the above calls to report()
1408 * won't redraw the view title. */
1410 update_view_title(view);
1415 * User request switch noodle
1419 view_driver(struct view *view, enum request request)
1426 case REQ_MOVE_PAGE_UP:
1427 case REQ_MOVE_PAGE_DOWN:
1428 case REQ_MOVE_FIRST_LINE:
1429 case REQ_MOVE_LAST_LINE:
1430 move_view(view, request, TRUE);
1433 case REQ_SCROLL_LINE_DOWN:
1434 case REQ_SCROLL_LINE_UP:
1435 case REQ_SCROLL_PAGE_DOWN:
1436 case REQ_SCROLL_PAGE_UP:
1437 scroll_view(view, request);
1444 case REQ_VIEW_PAGER:
1445 open_view(view, request, OPEN_DEFAULT);
1450 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
1452 if (view == VIEW(REQ_VIEW_DIFF) &&
1453 view->parent == VIEW(REQ_VIEW_MAIN)) {
1454 bool redraw = display[1] == view;
1456 view = view->parent;
1457 move_view(view, request, redraw);
1459 update_view_title(view);
1461 move_view(view, request, TRUE);
1468 report("Nothing to enter");
1471 return view->ops->enter(view, &view->line[view->lineno]);
1475 int nviews = displayed_views();
1476 int next_view = (current_view + 1) % nviews;
1478 if (next_view == current_view) {
1479 report("Only one view is displayed");
1483 current_view = next_view;
1484 /* Blur out the title of the previous view. */
1485 update_view_title(view);
1489 case REQ_TOGGLE_LINENO:
1490 opt_line_number = !opt_line_number;
1494 case REQ_TOGGLE_REV_GRAPH:
1495 opt_rev_graph = !opt_rev_graph;
1500 /* Always reload^Wrerun commands from the prompt. */
1501 open_view(view, opt_request, OPEN_RELOAD);
1504 case REQ_STOP_LOADING:
1505 for (i = 0; i < ARRAY_SIZE(views); i++) {
1508 report("Stopped loading the %s view", view->name),
1513 case REQ_SHOW_VERSION:
1514 report("%s (built %s)", VERSION, __DATE__);
1517 case REQ_SCREEN_RESIZE:
1520 case REQ_SCREEN_REDRAW:
1524 case REQ_SCREEN_UPDATE:
1528 case REQ_VIEW_CLOSE:
1529 /* XXX: Mark closed views by letting view->parent point to the
1530 * view itself. Parents to closed view should never be
1533 view->parent->parent != view->parent) {
1534 memset(display, 0, sizeof(display));
1536 display[current_view] = view->parent;
1537 view->parent = view;
1547 /* An unknown key will show most commonly used commands. */
1548 report("Unknown key, press 'h' for help");
1561 pager_draw(struct view *view, struct line *line, unsigned int lineno)
1563 char *text = line->data;
1564 enum line_type type = line->type;
1565 int textlen = strlen(text);
1568 wmove(view->win, lineno, 0);
1570 if (view->offset + lineno == view->lineno) {
1571 if (type == LINE_COMMIT) {
1572 string_copy(view->ref, text + 7);
1573 string_copy(ref_commit, view->ref);
1577 wchgat(view->win, -1, 0, type, NULL);
1580 attr = get_line_attr(type);
1581 wattrset(view->win, attr);
1583 if (opt_line_number || opt_tab_size < TABSIZE) {
1584 static char spaces[] = " ";
1585 int col_offset = 0, col = 0;
1587 if (opt_line_number) {
1588 unsigned long real_lineno = view->offset + lineno + 1;
1590 if (real_lineno == 1 ||
1591 (real_lineno % opt_num_interval) == 0) {
1592 wprintw(view->win, "%.*d", view->digits, real_lineno);
1595 waddnstr(view->win, spaces,
1596 MIN(view->digits, STRING_SIZE(spaces)));
1598 waddstr(view->win, ": ");
1599 col_offset = view->digits + 2;
1602 while (text && col_offset + col < view->width) {
1603 int cols_max = view->width - col_offset - col;
1607 if (*text == '\t') {
1609 assert(sizeof(spaces) > TABSIZE);
1611 cols = opt_tab_size - (col % opt_tab_size);
1614 text = strchr(text, '\t');
1615 cols = line ? text - pos : strlen(pos);
1618 waddnstr(view->win, pos, MIN(cols, cols_max));
1623 int col = 0, pos = 0;
1625 for (; pos < textlen && col < view->width; pos++, col++)
1626 if (text[pos] == '\t')
1627 col += TABSIZE - (col % TABSIZE) - 1;
1629 waddnstr(view->win, text, pos);
1636 add_pager_refs(struct view *view, struct line *line)
1639 char *data = line->data;
1641 int bufpos = 0, refpos = 0;
1642 const char *sep = "Refs: ";
1644 assert(line->type == LINE_COMMIT);
1646 refs = get_refs(data + STRING_SIZE("commit "));
1651 struct ref *ref = refs[refpos];
1652 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
1654 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
1657 } while (refs[refpos++]->next);
1659 if (!realloc_lines(view, view->line_size + 1))
1662 line = &view->line[view->lines];
1663 line->data = strdup(buf);
1667 line->type = LINE_PP_REFS;
1672 pager_read(struct view *view, char *data)
1674 struct line *line = &view->line[view->lines];
1676 line->data = strdup(data);
1680 line->type = get_line_type(line->data);
1683 if (line->type == LINE_COMMIT &&
1684 (view == VIEW(REQ_VIEW_DIFF) ||
1685 view == VIEW(REQ_VIEW_LOG)))
1686 add_pager_refs(view, line);
1692 pager_enter(struct view *view, struct line *line)
1696 if (line->type == LINE_COMMIT &&
1697 (view == VIEW(REQ_VIEW_LOG) ||
1698 view == VIEW(REQ_VIEW_PAGER))) {
1699 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
1703 /* Always scroll the view even if it was split. That way
1704 * you can use Enter to scroll through the log view and
1705 * split open each commit diff. */
1706 scroll_view(view, REQ_SCROLL_LINE_DOWN);
1708 /* FIXME: A minor workaround. Scrolling the view will call report("")
1709 * but if we are scrolling a non-current view this won't properly
1710 * update the view title. */
1712 update_view_title(view);
1717 static struct view_ops pager_ops = {
1730 char id[41]; /* SHA1 ID. */
1731 char title[75]; /* First line of the commit message. */
1732 char author[75]; /* Author of the commit. */
1733 struct tm time; /* Date from the author ident. */
1734 struct ref **refs; /* Repository references. */
1735 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
1736 size_t graph_size; /* The width of the graph array. */
1740 main_draw(struct view *view, struct line *line, unsigned int lineno)
1742 char buf[DATE_COLS + 1];
1743 struct commit *commit = line->data;
1744 enum line_type type;
1750 if (!*commit->author)
1753 wmove(view->win, lineno, col);
1755 if (view->offset + lineno == view->lineno) {
1756 string_copy(view->ref, commit->id);
1757 string_copy(ref_commit, view->ref);
1759 wattrset(view->win, get_line_attr(type));
1760 wchgat(view->win, -1, 0, type, NULL);
1763 type = LINE_MAIN_COMMIT;
1764 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
1767 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
1768 waddnstr(view->win, buf, timelen);
1769 waddstr(view->win, " ");
1772 wmove(view->win, lineno, col);
1773 if (type != LINE_CURSOR)
1774 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
1777 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
1779 authorlen = strlen(commit->author);
1780 if (authorlen > AUTHOR_COLS - 2) {
1781 authorlen = AUTHOR_COLS - 2;
1787 waddnstr(view->win, commit->author, authorlen);
1788 if (type != LINE_CURSOR)
1789 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
1790 waddch(view->win, '~');
1792 waddstr(view->win, commit->author);
1796 if (type != LINE_CURSOR)
1797 wattrset(view->win, A_NORMAL);
1799 if (opt_rev_graph && commit->graph_size) {
1802 wmove(view->win, lineno, col);
1803 /* Using waddch() instead of waddnstr() ensures that
1804 * they'll be rendered correctly for the cursor line. */
1805 for (i = 0; i < commit->graph_size; i++)
1806 waddch(view->win, commit->graph[i]);
1808 col += commit->graph_size + 1;
1811 wmove(view->win, lineno, col);
1817 if (type == LINE_CURSOR)
1819 else if (commit->refs[i]->tag)
1820 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
1822 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
1823 waddstr(view->win, "[");
1824 waddstr(view->win, commit->refs[i]->name);
1825 waddstr(view->win, "]");
1826 if (type != LINE_CURSOR)
1827 wattrset(view->win, A_NORMAL);
1828 waddstr(view->win, " ");
1829 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
1830 } while (commit->refs[i++]->next);
1833 if (type != LINE_CURSOR)
1834 wattrset(view->win, get_line_attr(type));
1837 int titlelen = strlen(commit->title);
1839 if (col + titlelen > view->width)
1840 titlelen = view->width - col;
1842 waddnstr(view->win, commit->title, titlelen);
1848 /* Reads git log --pretty=raw output and parses it into the commit struct. */
1850 main_read(struct view *view, char *line)
1852 enum line_type type = get_line_type(line);
1853 struct commit *commit = view->lines
1854 ? view->line[view->lines - 1].data : NULL;
1858 commit = calloc(1, sizeof(struct commit));
1862 line += STRING_SIZE("commit ");
1864 view->line[view->lines++].data = commit;
1865 string_copy(commit->id, line);
1866 commit->refs = get_refs(commit->id);
1867 commit->graph[commit->graph_size++] = ACS_LTEE;
1872 char *ident = line + STRING_SIZE("author ");
1873 char *end = strchr(ident, '<');
1879 for (; end > ident && isspace(end[-1]); end--) ;
1883 string_copy(commit->author, ident);
1885 /* Parse epoch and timezone */
1887 char *secs = strchr(end + 1, '>');
1891 if (!secs || secs[1] != ' ')
1895 time = (time_t) atol(secs);
1896 zone = strchr(secs, ' ');
1897 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
1901 tz = ('0' - zone[1]) * 60 * 60 * 10;
1902 tz += ('0' - zone[2]) * 60 * 60;
1903 tz += ('0' - zone[3]) * 60;
1904 tz += ('0' - zone[4]) * 60;
1911 gmtime_r(&time, &commit->time);
1919 /* Fill in the commit title if it has not already been set. */
1920 if (commit->title[0])
1923 /* Require titles to start with a non-space character at the
1924 * offset used by git log. */
1925 /* FIXME: More gracefull handling of titles; append "..." to
1926 * shortened titles, etc. */
1927 if (strncmp(line, " ", 4) ||
1931 string_copy(commit->title, line + 4);
1938 main_enter(struct view *view, struct line *line)
1940 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
1942 open_view(view, REQ_VIEW_DIFF, flags);
1946 static struct view_ops main_ops = {
1963 static struct keymap keymap[] = {
1964 /* View switching */
1965 { 'm', REQ_VIEW_MAIN },
1966 { 'd', REQ_VIEW_DIFF },
1967 { 'l', REQ_VIEW_LOG },
1968 { 'p', REQ_VIEW_PAGER },
1969 { 'h', REQ_VIEW_HELP },
1970 { '?', REQ_VIEW_HELP },
1972 /* View manipulation */
1973 { 'q', REQ_VIEW_CLOSE },
1974 { KEY_TAB, REQ_VIEW_NEXT },
1975 { KEY_RETURN, REQ_ENTER },
1976 { KEY_UP, REQ_PREVIOUS },
1977 { KEY_DOWN, REQ_NEXT },
1979 /* Cursor navigation */
1980 { 'k', REQ_MOVE_UP },
1981 { 'j', REQ_MOVE_DOWN },
1982 { KEY_HOME, REQ_MOVE_FIRST_LINE },
1983 { KEY_END, REQ_MOVE_LAST_LINE },
1984 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
1985 { ' ', REQ_MOVE_PAGE_DOWN },
1986 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
1987 { 'b', REQ_MOVE_PAGE_UP },
1988 { '-', REQ_MOVE_PAGE_UP },
1991 { KEY_IC, REQ_SCROLL_LINE_UP },
1992 { KEY_DC, REQ_SCROLL_LINE_DOWN },
1993 { 'w', REQ_SCROLL_PAGE_UP },
1994 { 's', REQ_SCROLL_PAGE_DOWN },
1998 { 'z', REQ_STOP_LOADING },
1999 { 'v', REQ_SHOW_VERSION },
2000 { 'r', REQ_SCREEN_REDRAW },
2001 { 'n', REQ_TOGGLE_LINENO },
2002 { 'g', REQ_TOGGLE_REV_GRAPH},
2003 { ':', REQ_PROMPT },
2005 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
2006 { ERR, REQ_SCREEN_UPDATE },
2008 /* Use the ncurses SIGWINCH handler. */
2009 { KEY_RESIZE, REQ_SCREEN_RESIZE },
2013 get_request(int key)
2017 for (i = 0; i < ARRAY_SIZE(keymap); i++)
2018 if (keymap[i].alias == key)
2019 return keymap[i].request;
2021 return (enum request) key;
2029 static struct key key_table[] = {
2030 { "Enter", KEY_RETURN },
2032 { "Backspace", KEY_BACKSPACE },
2034 { "Escape", KEY_ESC },
2035 { "Left", KEY_LEFT },
2036 { "Right", KEY_RIGHT },
2038 { "Down", KEY_DOWN },
2039 { "Insert", KEY_IC },
2040 { "Delete", KEY_DC },
2041 { "Home", KEY_HOME },
2043 { "PageUp", KEY_PPAGE },
2044 { "PageDown", KEY_NPAGE },
2054 { "F10", KEY_F(10) },
2055 { "F11", KEY_F(11) },
2056 { "F12", KEY_F(12) },
2060 get_key(enum request request)
2062 static char buf[BUFSIZ];
2063 static char key_char[] = "'X'";
2070 for (i = 0; i < ARRAY_SIZE(keymap); i++) {
2074 if (keymap[i].request != request)
2077 for (key = 0; key < ARRAY_SIZE(key_table); key++)
2078 if (key_table[key].value == keymap[i].alias)
2079 seq = key_table[key].name;
2082 keymap[i].alias < 127 &&
2083 isprint(keymap[i].alias)) {
2084 key_char[1] = (char) keymap[i].alias;
2091 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
2092 return "Too many keybindings!";
2099 static void load_help_page(void)
2102 struct view *view = VIEW(REQ_VIEW_HELP);
2103 int lines = ARRAY_SIZE(req_info) + 2;
2106 if (view->lines > 0)
2109 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2110 if (!req_info[i].request)
2113 view->line = calloc(lines, sizeof(*view->line));
2115 report("Allocation failure");
2119 pager_read(view, "Quick reference for tig keybindings:");
2121 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2124 if (!req_info[i].request) {
2125 pager_read(view, "");
2126 pager_read(view, req_info[i].help);
2130 key = get_key(req_info[i].request);
2131 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
2134 pager_read(view, buf);
2140 * Unicode / UTF-8 handling
2142 * NOTE: Much of the following code for dealing with unicode is derived from
2143 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2144 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2147 /* I've (over)annotated a lot of code snippets because I am not entirely
2148 * confident that the approach taken by this small UTF-8 interface is correct.
2152 unicode_width(unsigned long c)
2155 (c <= 0x115f /* Hangul Jamo */
2158 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
2160 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2161 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2162 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2163 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2164 || (c >= 0xffe0 && c <= 0xffe6)
2165 || (c >= 0x20000 && c <= 0x2fffd)
2166 || (c >= 0x30000 && c <= 0x3fffd)))
2172 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2173 * Illegal bytes are set one. */
2174 static const unsigned char utf8_bytes[256] = {
2175 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,
2176 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,
2177 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,
2178 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,
2179 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,
2180 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,
2181 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,
2182 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,
2185 /* Decode UTF-8 multi-byte representation into a unicode character. */
2186 static inline unsigned long
2187 utf8_to_unicode(const char *string, size_t length)
2189 unsigned long unicode;
2193 unicode = string[0];
2196 unicode = (string[0] & 0x1f) << 6;
2197 unicode += (string[1] & 0x3f);
2200 unicode = (string[0] & 0x0f) << 12;
2201 unicode += ((string[1] & 0x3f) << 6);
2202 unicode += (string[2] & 0x3f);
2205 unicode = (string[0] & 0x0f) << 18;
2206 unicode += ((string[1] & 0x3f) << 12);
2207 unicode += ((string[2] & 0x3f) << 6);
2208 unicode += (string[3] & 0x3f);
2211 unicode = (string[0] & 0x0f) << 24;
2212 unicode += ((string[1] & 0x3f) << 18);
2213 unicode += ((string[2] & 0x3f) << 12);
2214 unicode += ((string[3] & 0x3f) << 6);
2215 unicode += (string[4] & 0x3f);
2218 unicode = (string[0] & 0x01) << 30;
2219 unicode += ((string[1] & 0x3f) << 24);
2220 unicode += ((string[2] & 0x3f) << 18);
2221 unicode += ((string[3] & 0x3f) << 12);
2222 unicode += ((string[4] & 0x3f) << 6);
2223 unicode += (string[5] & 0x3f);
2226 die("Invalid unicode length");
2229 /* Invalid characters could return the special 0xfffd value but NUL
2230 * should be just as good. */
2231 return unicode > 0xffff ? 0 : unicode;
2234 /* Calculates how much of string can be shown within the given maximum width
2235 * and sets trimmed parameter to non-zero value if all of string could not be
2238 * Additionally, adds to coloffset how many many columns to move to align with
2239 * the expected position. Takes into account how multi-byte and double-width
2240 * characters will effect the cursor position.
2242 * Returns the number of bytes to output from string to satisfy max_width. */
2244 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
2246 const char *start = string;
2247 const char *end = strchr(string, '\0');
2253 while (string < end) {
2254 int c = *(unsigned char *) string;
2255 unsigned char bytes = utf8_bytes[c];
2257 unsigned long unicode;
2259 if (string + bytes > end)
2262 /* Change representation to figure out whether
2263 * it is a single- or double-width character. */
2265 unicode = utf8_to_unicode(string, bytes);
2266 /* FIXME: Graceful handling of invalid unicode character. */
2270 ucwidth = unicode_width(unicode);
2272 if (width > max_width) {
2277 /* The column offset collects the differences between the
2278 * number of bytes encoding a character and the number of
2279 * columns will be used for rendering said character.
2281 * So if some character A is encoded in 2 bytes, but will be
2282 * represented on the screen using only 1 byte this will and up
2283 * adding 1 to the multi-byte column offset.
2285 * Assumes that no double-width character can be encoding in
2286 * less than two bytes. */
2287 if (bytes > ucwidth)
2288 mbwidth += bytes - ucwidth;
2293 *coloffset += mbwidth;
2295 return string - start;
2303 /* Whether or not the curses interface has been initialized. */
2304 static bool cursed = FALSE;
2306 /* The status window is used for polling keystrokes. */
2307 static WINDOW *status_win;
2309 /* Update status and title window. */
2311 report(const char *msg, ...)
2313 static bool empty = TRUE;
2314 struct view *view = display[current_view];
2316 if (!empty || *msg) {
2319 va_start(args, msg);
2322 wmove(status_win, 0, 0);
2324 vwprintw(status_win, msg, args);
2329 wrefresh(status_win);
2334 update_view_title(view);
2335 update_display_cursor();
2338 /* Controls when nodelay should be in effect when polling user input. */
2340 set_nonblocking_input(bool loading)
2342 static unsigned int loading_views;
2344 if ((loading == FALSE && loading_views-- == 1) ||
2345 (loading == TRUE && loading_views++ == 0))
2346 nodelay(status_win, loading);
2354 /* Initialize the curses library */
2355 if (isatty(STDIN_FILENO)) {
2356 cursed = !!initscr();
2358 /* Leave stdin and stdout alone when acting as a pager. */
2359 FILE *io = fopen("/dev/tty", "r+");
2361 cursed = !!newterm(NULL, io, io);
2365 die("Failed to initialize curses");
2367 nonl(); /* Tell curses not to do NL->CR/NL on output */
2368 cbreak(); /* Take input chars one at a time, no wait for \n */
2369 noecho(); /* Don't echo input */
2370 leaveok(stdscr, TRUE);
2375 getmaxyx(stdscr, y, x);
2376 status_win = newwin(1, 0, y - 1, 0);
2378 die("Failed to create status window");
2380 /* Enable keyboard mapping */
2381 keypad(status_win, TRUE);
2382 wbkgdset(status_win, get_line_attr(LINE_STATUS));
2387 * Repository references
2390 static struct ref *refs;
2391 static size_t refs_size;
2393 /* Id <-> ref store */
2394 static struct ref ***id_refs;
2395 static size_t id_refs_size;
2397 static struct ref **
2400 struct ref ***tmp_id_refs;
2401 struct ref **ref_list = NULL;
2402 size_t ref_list_size = 0;
2405 for (i = 0; i < id_refs_size; i++)
2406 if (!strcmp(id, id_refs[i][0]->id))
2409 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
2413 id_refs = tmp_id_refs;
2415 for (i = 0; i < refs_size; i++) {
2418 if (strcmp(id, refs[i].id))
2421 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
2429 if (ref_list_size > 0)
2430 ref_list[ref_list_size - 1]->next = 1;
2431 ref_list[ref_list_size] = &refs[i];
2433 /* XXX: The properties of the commit chains ensures that we can
2434 * safely modify the shared ref. The repo references will
2435 * always be similar for the same id. */
2436 ref_list[ref_list_size]->next = 0;
2441 id_refs[id_refs_size++] = ref_list;
2447 read_ref(char *id, int idlen, char *name, int namelen)
2452 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
2453 /* Commits referenced by tags has "^{}" appended. */
2454 if (name[namelen - 1] != '}')
2457 while (namelen > 0 && name[namelen] != '^')
2461 namelen -= STRING_SIZE("refs/tags/");
2462 name += STRING_SIZE("refs/tags/");
2464 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
2465 namelen -= STRING_SIZE("refs/heads/");
2466 name += STRING_SIZE("refs/heads/");
2468 } else if (!strcmp(name, "HEAD")) {
2472 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
2476 ref = &refs[refs_size++];
2477 ref->name = malloc(namelen + 1);
2481 strncpy(ref->name, name, namelen);
2482 ref->name[namelen] = 0;
2484 string_copy(ref->id, id);
2492 const char *cmd_env = getenv("TIG_LS_REMOTE");
2493 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
2495 return read_properties(popen(cmd, "r"), "\t", read_ref);
2499 read_repo_config_option(char *name, int namelen, char *value, int valuelen)
2501 if (!strcmp(name, "i18n.commitencoding"))
2502 string_copy(opt_encoding, value);
2508 load_repo_config(void)
2510 return read_properties(popen("git repo-config --list", "r"),
2511 "=", read_repo_config_option);
2515 read_properties(FILE *pipe, const char *separators,
2516 int (*read_property)(char *, int, char *, int))
2518 char buffer[BUFSIZ];
2525 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
2530 name = chomp_string(name);
2531 namelen = strcspn(name, separators);
2533 if (name[namelen]) {
2535 value = chomp_string(name + namelen + 1);
2536 valuelen = strlen(value);
2543 state = read_property(name, namelen, value, valuelen);
2546 if (state != ERR && ferror(pipe))
2559 static void __NORETURN
2562 /* XXX: Restore tty modes and let the OS cleanup the rest! */
2568 static void __NORETURN
2569 die(const char *err, ...)
2575 va_start(args, err);
2576 fputs("tig: ", stderr);
2577 vfprintf(stderr, err, args);
2578 fputs("\n", stderr);
2585 main(int argc, char *argv[])
2588 enum request request;
2591 signal(SIGINT, quit);
2593 if (load_options() == ERR)
2594 die("Failed to load user config.");
2596 /* Load the repo config file so options can be overwritten from
2597 * the command line. */
2598 if (load_repo_config() == ERR)
2599 die("Failed to load repo config.");
2601 if (!parse_options(argc, argv))
2604 if (load_refs() == ERR)
2605 die("Failed to load refs.");
2607 /* Require a git repository unless when running in pager mode. */
2608 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
2609 die("Not a git repository");
2611 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
2612 view->cmd_env = getenv(view->cmd_env);
2614 request = opt_request;
2618 while (view_driver(display[current_view], request)) {
2622 foreach_view (view, i)
2625 /* Refresh, accept single keystroke of input */
2626 key = wgetch(status_win);
2627 request = get_request(key);
2629 /* Some low-level request handling. This keeps access to
2630 * status_win restricted. */
2634 /* Temporarily switch to line-oriented and echoed
2639 if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
2640 memcpy(opt_cmd, "git ", 4);
2641 opt_request = REQ_VIEW_PAGER;
2643 report("Prompt interrupted by loading view, "
2644 "press 'z' to stop loading views");
2645 request = REQ_SCREEN_UPDATE;
2652 case REQ_SCREEN_RESIZE:
2656 getmaxyx(stdscr, height, width);
2658 /* Resize the status view and let the view driver take
2659 * care of resizing the displayed views. */
2660 wresize(status_win, 1, width);
2661 mvwin(status_win, height - 1, 0);
2662 wrefresh(status_win);