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[tig] / tig.c
1 /* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
2 * See license info at the bottom. */
3 /**
4 * TIG(1)
5 * ======
6 *
7 * NAME
8 * ----
9 * tig - text-mode interface for git
10 *
11 * SYNOPSIS
12 * --------
13 * [verse]
14 * tig [options]
15 * tig [options] [--] [git log options]
16 * tig [options] log [git log options]
17 * tig [options] diff [git diff options]
18 * tig [options] show [git show options]
19 * tig [options] < [git command output]
20 *
21 * DESCRIPTION
22 * -----------
23 * Browse changes in a git repository.
24 **/
25
26 #ifndef VERSION
27 #define VERSION "tig-0.1"
28 #endif
29
30 #ifndef DEBUG
31 #define NDEBUG
32 #endif
33
34 #include <assert.h>
35 #include <errno.h>
36 #include <ctype.h>
37 #include <signal.h>
38 #include <stdarg.h>
39 #include <stdio.h>
40 #include <stdlib.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <time.h>
44
45 #include <curses.h>
46
47 static void die(const char *err, ...);
48 static void report(const char *msg, ...);
49 static void set_nonblocking_input(int boolean);
50
51 #define ABS(x) ((x) >= 0 ? (x) : -(x))
52 #define MIN(x, y) ((x) < (y) ? (x) : (y))
53
54 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
55 #define STRING_SIZE(x) (sizeof(x) - 1)
56
57 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
58 #define SIZEOF_CMD 1024 /* Size of command buffer. */
59
60 /* This color name can be used to refer to the default term colors. */
61 #define COLOR_DEFAULT (-1)
62
63 /* The format and size of the date column in the main view. */
64 #define DATE_FORMAT "%Y-%m-%d %H:%M"
65 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
66
67 /* The default interval between line numbers. */
68 #define NUMBER_INTERVAL 1
69
70 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
71
72 /* Some ascii-shorthands fitted into the ncurses namespace. */
73 #define KEY_TAB '\t'
74 #define KEY_RETURN '\r'
75 #define KEY_ESC 27
76
77 /* User action requests. */
78 enum request {
79 /* Offset all requests to avoid conflicts with ncurses getch values. */
80 REQ_OFFSET = KEY_MAX + 1,
81
82 /* XXX: Keep the view request first and in sync with views[]. */
83 REQ_VIEW_MAIN,
84 REQ_VIEW_DIFF,
85 REQ_VIEW_LOG,
86 REQ_VIEW_HELP,
87 REQ_VIEW_PAGER,
88
89 REQ_ENTER,
90 REQ_QUIT,
91 REQ_PROMPT,
92 REQ_SCREEN_REDRAW,
93 REQ_SCREEN_UPDATE,
94 REQ_SHOW_VERSION,
95 REQ_STOP_LOADING,
96 REQ_TOGGLE_LINE_NUMBERS,
97 REQ_VIEW_NEXT,
98
99 REQ_MOVE_UP,
100 REQ_MOVE_DOWN,
101 REQ_MOVE_PAGE_UP,
102 REQ_MOVE_PAGE_DOWN,
103 REQ_MOVE_FIRST_LINE,
104 REQ_MOVE_LAST_LINE,
105
106 REQ_SCROLL_LINE_UP,
107 REQ_SCROLL_LINE_DOWN,
108 REQ_SCROLL_PAGE_UP,
109 REQ_SCROLL_PAGE_DOWN,
110 };
111
112 struct commit {
113 char id[41]; /* SHA1 ID. */
114 char title[75]; /* The first line of the commit message. */
115 char author[75]; /* The author of the commit. */
116 struct tm time; /* Date from the author ident. */
117 };
118
119 /*
120 * String helpers
121 */
122
123 static inline void
124 string_ncopy(char *dst, char *src, int dstlen)
125 {
126 strncpy(dst, src, dstlen - 1);
127 dst[dstlen - 1] = 0;
128
129 }
130
131 /* Shorthand for safely copying into a fixed buffer. */
132 #define string_copy(dst, src) \
133 string_ncopy(dst, src, sizeof(dst))
134
135 /* Shell quoting
136 *
137 * NOTE: The following is a slightly modified copy of the git project's shell
138 * quoting routines found in the quote.c file.
139 *
140 * Help to copy the thing properly quoted for the shell safety. any single
141 * quote is replaced with '\'', any exclamation point is replaced with '\!',
142 * and the whole thing is enclosed in a
143 *
144 * E.g.
145 * original sq_quote result
146 * name ==> name ==> 'name'
147 * a b ==> a b ==> 'a b'
148 * a'b ==> a'\''b ==> 'a'\''b'
149 * a!b ==> a'\!'b ==> 'a'\!'b'
150 */
151
152 static size_t
153 sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
154 {
155 char c;
156
157 #define BUFPUT(x) ( (bufsize < SIZEOF_CMD) && (buf[bufsize++] = (x)) )
158
159 BUFPUT('\'');
160 while ((c = *src++)) {
161 if (c == '\'' || c == '!') {
162 BUFPUT('\'');
163 BUFPUT('\\');
164 BUFPUT(c);
165 BUFPUT('\'');
166 } else {
167 BUFPUT(c);
168 }
169 }
170 BUFPUT('\'');
171
172 return bufsize;
173 }
174
175
176 /**
177 * OPTIONS
178 * -------
179 **/
180
181 static int opt_line_number = FALSE;
182 static int opt_num_interval = NUMBER_INTERVAL;
183 static enum request opt_request = REQ_VIEW_MAIN;
184 static char opt_cmd[SIZEOF_CMD] = "";
185 static FILE *opt_pipe = NULL;
186
187 /* Returns the index of log or diff command or -1 to exit. */
188 static bool
189 parse_options(int argc, char *argv[])
190 {
191 int i;
192
193 for (i = 1; i < argc; i++) {
194 char *opt = argv[i];
195
196 /**
197 * -l::
198 * Start up in log view.
199 **/
200 if (!strcmp(opt, "-l")) {
201 opt_request = REQ_VIEW_LOG;
202 continue;
203 }
204
205 /**
206 * -d::
207 * Start up in diff view.
208 **/
209 if (!strcmp(opt, "-d")) {
210 opt_request = REQ_VIEW_DIFF;
211 continue;
212 }
213
214 /**
215 * -n[INTERVAL], --line-number[=INTERVAL]::
216 * Prefix line numbers in log and diff view.
217 * Optionally, with interval different than each line.
218 **/
219 if (!strncmp(opt, "-n", 2) ||
220 !strncmp(opt, "--line-number", 13)) {
221 char *num = opt;
222
223 if (opt[1] == 'n') {
224 num = opt + 2;
225
226 } else if (opt[STRING_SIZE("--line-number")] == '=') {
227 num = opt + STRING_SIZE("--line-number=");
228 }
229
230 if (isdigit(*num))
231 opt_num_interval = atoi(num);
232
233 opt_line_number = TRUE;
234 continue;
235 }
236
237 /**
238 * -v, --version::
239 * Show version and exit.
240 **/
241 if (!strcmp(opt, "-v") ||
242 !strcmp(opt, "--version")) {
243 printf("tig version %s\n", VERSION);
244 return FALSE;
245 }
246
247 /**
248 * \--::
249 * End of tig(1) options. Useful when specifying commands
250 * for the main view. Example:
251 *
252 * $ tig -- --since=1.month
253 **/
254 if (!strcmp(opt, "--")) {
255 i++;
256 break;
257 }
258
259 /**
260 * log [options]::
261 * Open log view using the given git log options.
262 *
263 * diff [options]::
264 * Open diff view using the given git diff options.
265 *
266 * show [options]::
267 * Open diff view using the given git show options.
268 **/
269 if (!strcmp(opt, "log") ||
270 !strcmp(opt, "diff") ||
271 !strcmp(opt, "show")) {
272 opt_request = opt[0] == 'l'
273 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
274 break;
275 }
276
277 /* Make stuff like:
278 *
279 * $ tig tag-1.0..HEAD
280 *
281 * work. */
282 if (opt[0] && opt[0] != '-')
283 break;
284
285 die("unknown command '%s'", opt);
286 }
287
288 if (!isatty(STDIN_FILENO)) {
289 /**
290 * Pager mode
291 * ~~~~~~~~~~
292 * If stdin is a pipe, any log or diff options will be ignored and the
293 * pager view will be opened loading data from stdin. The pager mode
294 * can be used for colorizing output from various git commands.
295 *
296 * Example on how to colorize the output of git-show(1):
297 *
298 * $ git show | tig
299 **/
300 opt_request = REQ_VIEW_PAGER;
301 opt_pipe = stdin;
302
303 } else if (i < argc) {
304 size_t buf_size;
305
306 /**
307 * Git command options
308 * ~~~~~~~~~~~~~~~~~~~
309 *
310 * All git command options specified on the command line will
311 * be passed to the given command and all will be shell quoted
312 * before used.
313 *
314 * NOTE: It is possible to specify options even for the main
315 * view. If doing this you should not touch the --pretty
316 * option.
317 *
318 * Example on how to open the log view and show both author and
319 * committer information:
320 *
321 * $ tig log --pretty=fuller
322 **/
323
324 if (opt_request == REQ_VIEW_MAIN)
325 /* XXX: This is vulnerable to the user overriding
326 * options required for the main view parser. */
327 string_copy(opt_cmd, "git log --stat --pretty=raw");
328 else
329 string_copy(opt_cmd, "git");
330 buf_size = strlen(opt_cmd);
331
332 while (buf_size < sizeof(opt_cmd) && i < argc) {
333 opt_cmd[buf_size++] = ' ';
334 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
335 }
336
337 if (buf_size >= sizeof(opt_cmd))
338 die("command too long");
339
340 opt_cmd[buf_size] = 0;
341
342 }
343
344 return TRUE;
345 }
346
347
348 /**
349 * KEYS
350 * ----
351 **/
352
353 #define HELP "(d)iff, (l)og, (m)ain, (q)uit, (v)ersion, (h)elp"
354
355 struct keymap {
356 int alias;
357 int request;
358 };
359
360 struct keymap keymap[] = {
361 /**
362 * View switching
363 * ~~~~~~~~~~~~~~
364 * d::
365 * Switch to diff view.
366 * l::
367 * Switch to log view.
368 * m::
369 * Switch to main view.
370 * p::
371 * Switch to pager view.
372 * h::
373 * Show man page.
374 * Return::
375 * If in main view split the view
376 * and show the diff in the bottom view.
377 * Tab::
378 * Switch to next view.
379 **/
380 { 'm', REQ_VIEW_MAIN },
381 { 'd', REQ_VIEW_DIFF },
382 { 'l', REQ_VIEW_LOG },
383 { 'p', REQ_VIEW_PAGER },
384 { 'h', REQ_VIEW_HELP },
385
386 { KEY_TAB, REQ_VIEW_NEXT },
387 { KEY_RETURN, REQ_ENTER },
388
389 /**
390 * Cursor navigation
391 * ~~~~~~~~~~~~~~~~~
392 * Up, k::
393 * Move curser one line up.
394 * Down, j::
395 * Move cursor one line down.
396 * Page Up::
397 * Move curser one page up.
398 * Page Down::
399 * Move cursor one page down.
400 * Home::
401 * Jump to first line.
402 * End::
403 * Jump to last line.
404 **/
405 { KEY_UP, REQ_MOVE_UP },
406 { 'k', REQ_MOVE_UP },
407 { KEY_DOWN, REQ_MOVE_DOWN },
408 { 'j', REQ_MOVE_DOWN },
409 { KEY_HOME, REQ_MOVE_FIRST_LINE },
410 { KEY_END, REQ_MOVE_LAST_LINE },
411 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
412 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
413
414 /**
415 * Scrolling
416 * ~~~~~~~~~
417 * Insert::
418 * Scroll view one line up.
419 * Delete::
420 * Scroll view one line down.
421 * w::
422 * Scroll view one page up.
423 * s::
424 * Scroll view one page down.
425 **/
426 { KEY_IC, REQ_SCROLL_LINE_UP },
427 { KEY_DC, REQ_SCROLL_LINE_DOWN },
428 { 'w', REQ_SCROLL_PAGE_UP },
429 { 's', REQ_SCROLL_PAGE_DOWN },
430
431 /**
432 * Misc
433 * ~~~~
434 * q, Escape::
435 * Quit
436 * r::
437 * Redraw screen.
438 * z::
439 * Stop all background loading.
440 * v::
441 * Show version.
442 * n::
443 * Toggle line numbers on/off.
444 * ':'::
445 * Open prompt. This allows you to specify what git command to run.
446 * Example:
447 *
448 * :log -p
449 *
450 **/
451 { KEY_ESC, REQ_QUIT },
452 { 'q', REQ_QUIT },
453 { 'z', REQ_STOP_LOADING },
454 { 'v', REQ_SHOW_VERSION },
455 { 'r', REQ_SCREEN_REDRAW },
456 { 'n', REQ_TOGGLE_LINE_NUMBERS },
457 { ':', REQ_PROMPT },
458
459 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
460 { ERR, REQ_SCREEN_UPDATE },
461 };
462
463 static enum request
464 get_request(int key)
465 {
466 int i;
467
468 for (i = 0; i < ARRAY_SIZE(keymap); i++)
469 if (keymap[i].alias == key)
470 return keymap[i].request;
471
472 return (enum request) key;
473 }
474
475
476 /*
477 * Line-oriented content detection.
478 */
479
480 #define LINE_INFO \
481 /* Line type String to match Foreground Background Attributes
482 * --------- --------------- ---------- ---------- ---------- */ \
483 /* Diff markup */ \
484 LINE(DIFF, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
485 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
486 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
487 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
488 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
489 LINE(DIFF_OLDMODE, "old mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
490 LINE(DIFF_NEWMODE, "new mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
491 LINE(DIFF_COPY, "copy ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
492 LINE(DIFF_RENAME, "rename ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
493 LINE(DIFF_SIM, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
494 LINE(DIFF_DISSIM, "dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
495 /* Pretty print commit header */ \
496 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
497 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
498 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
499 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
500 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
501 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
502 /* Raw commit header */ \
503 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
504 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
505 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
506 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
507 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
508 /* Misc */ \
509 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
510 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
511 /* UI colors */ \
512 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
513 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
514 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
515 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
516 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
517 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
518 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
519 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
520 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0),
521
522 enum line_type {
523 #define LINE(type, line, fg, bg, attr) \
524 LINE_##type
525 LINE_INFO
526 #undef LINE
527 };
528
529 struct line_info {
530 char *line; /* The start of line to match. */
531 int linelen; /* Size of string to match. */
532 int fg, bg, attr; /* Color and text attributes for the lines. */
533 };
534
535 static struct line_info line_info[] = {
536 #define LINE(type, line, fg, bg, attr) \
537 { (line), STRING_SIZE(line), (fg), (bg), (attr) }
538 LINE_INFO
539 #undef LINE
540 };
541
542 static enum line_type
543 get_line_type(char *line)
544 {
545 int linelen = strlen(line);
546 enum line_type type;
547
548 for (type = 0; type < ARRAY_SIZE(line_info); type++)
549 /* Case insensitive search matches Signed-off-by lines better. */
550 if (linelen >= line_info[type].linelen &&
551 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
552 return type;
553
554 return LINE_DEFAULT;
555 }
556
557 static inline int
558 get_line_attr(enum line_type type)
559 {
560 assert(type < ARRAY_SIZE(line_info));
561 return COLOR_PAIR(type) | line_info[type].attr;
562 }
563
564 static void
565 init_colors(void)
566 {
567 int default_bg = COLOR_BLACK;
568 int default_fg = COLOR_WHITE;
569 enum line_type type;
570
571 start_color();
572
573 if (use_default_colors() != ERR) {
574 default_bg = -1;
575 default_fg = -1;
576 }
577
578 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
579 struct line_info *info = &line_info[type];
580 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
581 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
582
583 init_pair(type, fg, bg);
584 }
585 }
586
587
588 /*
589 * Viewer
590 */
591
592 struct view {
593 const char *name; /* View name */
594 const char *cmdfmt; /* Default command line format */
595 char *id; /* Points to either of ref_{head,commit} */
596 size_t objsize; /* Size of objects in the line index */
597
598 struct view_ops {
599 /* Draw one line; @lineno must be < view->height. */
600 bool (*draw)(struct view *view, unsigned int lineno);
601 /* Read one line; updates view->line. */
602 bool (*read)(struct view *view, char *line);
603 /* Depending on view, change display based on current line. */
604 bool (*enter)(struct view *view);
605 } *ops;
606
607 char cmd[SIZEOF_CMD]; /* Command buffer */
608 char ref[SIZEOF_REF]; /* Hovered commit reference */
609 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
610
611 int height, width; /* The width and height of the main window */
612 WINDOW *win; /* The main window */
613 WINDOW *title; /* The title window living below the main window */
614
615 /* Navigation */
616 unsigned long offset; /* Offset of the window top */
617 unsigned long lineno; /* Current line number */
618
619 /* Buffering */
620 unsigned long lines; /* Total number of lines */
621 void **line; /* Line index; each line contains user data */
622 unsigned int digits; /* Number of digits in the lines member. */
623
624 /* Loading */
625 FILE *pipe;
626 time_t start_time;
627 };
628
629 static struct view_ops pager_ops;
630 static struct view_ops main_ops;
631
632 #define DIFF_CMD \
633 "git show --patch-with-stat --find-copies-harder -B -C %s"
634
635 #define LOG_CMD \
636 "git log --cc --stat -n100 %s"
637
638 #define MAIN_CMD \
639 "git log --stat --pretty=raw %s"
640
641 #define HELP_CMD \
642 "man tig 2> /dev/null"
643
644 char ref_head[SIZEOF_REF] = "HEAD";
645 char ref_commit[SIZEOF_REF] = "HEAD";
646
647 static struct view views[] = {
648 { "main", MAIN_CMD, ref_head, sizeof(struct commit), &main_ops },
649 { "diff", DIFF_CMD, ref_commit, sizeof(char), &pager_ops },
650 { "log", LOG_CMD, ref_head, sizeof(char), &pager_ops },
651 { "help", HELP_CMD, ref_head, sizeof(char), &pager_ops },
652 { "pager", "", "static", sizeof(char), &pager_ops },
653 };
654
655 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
656
657 /* The display array of active views and the index of the current view. */
658 static struct view *display[2];
659 static unsigned int current_view;
660
661 #define foreach_view(view, i) \
662 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
663
664
665 static void
666 redraw_view_from(struct view *view, int lineno)
667 {
668 assert(0 <= lineno && lineno < view->height);
669
670 for (; lineno < view->height; lineno++) {
671 if (!view->ops->draw(view, lineno))
672 break;
673 }
674
675 redrawwin(view->win);
676 wrefresh(view->win);
677 }
678
679 static void
680 redraw_view(struct view *view)
681 {
682 wclear(view->win);
683 redraw_view_from(view, 0);
684 }
685
686 static void
687 resize_display(void)
688 {
689 int offset, i;
690 struct view *base = display[0];
691 struct view *view = display[1] ? display[1] : display[0];
692
693 /* Setup window dimensions */
694
695 getmaxyx(stdscr, base->height, base->width);
696
697 /* Make room for the status window. */
698 base->height -= 1;
699
700 if (view != base) {
701 /* Horizontal split. */
702 view->width = base->width;
703 view->height = SCALE_SPLIT_VIEW(base->height);
704 base->height -= view->height;
705
706 /* Make room for the title bar. */
707 view->height -= 1;
708 }
709
710 /* Make room for the title bar. */
711 base->height -= 1;
712
713 offset = 0;
714
715 foreach_view (view, i) {
716 if (!view->win) {
717 view->win = newwin(view->height, 0, offset, 0);
718 if (!view->win)
719 die("Failed to create %s view", view->name);
720
721 scrollok(view->win, TRUE);
722
723 view->title = newwin(1, 0, offset + view->height, 0);
724 if (!view->title)
725 die("Failed to create title window");
726
727 } else {
728 wresize(view->win, view->height, view->width);
729 mvwin(view->win, offset, 0);
730 mvwin(view->title, offset + view->height, 0);
731 wrefresh(view->win);
732 }
733
734 offset += view->height + 1;
735 }
736 }
737
738 static void
739 update_view_title(struct view *view)
740 {
741 if (view == display[current_view])
742 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
743 else
744 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
745
746 werase(view->title);
747 wmove(view->title, 0, 0);
748
749 /* [main] ref: 334b506... - commit 6 of 4383 (0%) */
750
751 if (*view->ref)
752 wprintw(view->title, "[%s] ref: %s", view->name, view->ref);
753 else
754 wprintw(view->title, "[%s]", view->name);
755
756 if (view->lines) {
757 char *type = view == VIEW(REQ_VIEW_MAIN) ? "commit" : "line";
758
759 wprintw(view->title, " - %s %d of %d (%d%%)",
760 type,
761 view->lineno + 1,
762 view->lines,
763 (view->lineno + 1) * 100 / view->lines);
764 }
765
766 wrefresh(view->title);
767 }
768
769 /*
770 * Navigation
771 */
772
773 /* Scrolling backend */
774 static void
775 do_scroll_view(struct view *view, int lines)
776 {
777 /* The rendering expects the new offset. */
778 view->offset += lines;
779
780 assert(0 <= view->offset && view->offset < view->lines);
781 assert(lines);
782
783 /* Redraw the whole screen if scrolling is pointless. */
784 if (view->height < ABS(lines)) {
785 redraw_view(view);
786
787 } else {
788 int line = lines > 0 ? view->height - lines : 0;
789 int end = line + ABS(lines);
790
791 wscrl(view->win, lines);
792
793 for (; line < end; line++) {
794 if (!view->ops->draw(view, line))
795 break;
796 }
797 }
798
799 /* Move current line into the view. */
800 if (view->lineno < view->offset) {
801 view->lineno = view->offset;
802 view->ops->draw(view, 0);
803
804 } else if (view->lineno >= view->offset + view->height) {
805 view->lineno = view->offset + view->height - 1;
806 view->ops->draw(view, view->lineno - view->offset);
807 }
808
809 assert(view->offset <= view->lineno && view->lineno < view->lines);
810
811 redrawwin(view->win);
812 wrefresh(view->win);
813 report("");
814 }
815
816 /* Scroll frontend */
817 static void
818 scroll_view(struct view *view, enum request request)
819 {
820 int lines = 1;
821
822 switch (request) {
823 case REQ_SCROLL_PAGE_DOWN:
824 lines = view->height;
825 case REQ_SCROLL_LINE_DOWN:
826 if (view->offset + lines > view->lines)
827 lines = view->lines - view->offset;
828
829 if (lines == 0 || view->offset + view->height >= view->lines) {
830 report("Already on last line");
831 return;
832 }
833 break;
834
835 case REQ_SCROLL_PAGE_UP:
836 lines = view->height;
837 case REQ_SCROLL_LINE_UP:
838 if (lines > view->offset)
839 lines = view->offset;
840
841 if (lines == 0) {
842 report("Already on first line");
843 return;
844 }
845
846 lines = -lines;
847 break;
848
849 default:
850 die("request %d not handled in switch", request);
851 }
852
853 do_scroll_view(view, lines);
854 }
855
856 /* Cursor moving */
857 static void
858 move_view(struct view *view, enum request request)
859 {
860 int steps;
861
862 switch (request) {
863 case REQ_MOVE_FIRST_LINE:
864 steps = -view->lineno;
865 break;
866
867 case REQ_MOVE_LAST_LINE:
868 steps = view->lines - view->lineno - 1;
869 break;
870
871 case REQ_MOVE_PAGE_UP:
872 steps = view->height > view->lineno
873 ? -view->lineno : -view->height;
874 break;
875
876 case REQ_MOVE_PAGE_DOWN:
877 steps = view->lineno + view->height >= view->lines
878 ? view->lines - view->lineno - 1 : view->height;
879 break;
880
881 case REQ_MOVE_UP:
882 steps = -1;
883 break;
884
885 case REQ_MOVE_DOWN:
886 steps = 1;
887 break;
888
889 default:
890 die("request %d not handled in switch", request);
891 }
892
893 if (steps <= 0 && view->lineno == 0) {
894 report("Already on first line");
895 return;
896
897 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
898 report("Already on last line");
899 return;
900 }
901
902 /* Move the current line */
903 view->lineno += steps;
904 assert(0 <= view->lineno && view->lineno < view->lines);
905
906 /* Repaint the old "current" line if we be scrolling */
907 if (ABS(steps) < view->height) {
908 int prev_lineno = view->lineno - steps - view->offset;
909
910 wmove(view->win, prev_lineno, 0);
911 wclrtoeol(view->win);
912 view->ops->draw(view, prev_lineno);
913 }
914
915 /* Check whether the view needs to be scrolled */
916 if (view->lineno < view->offset ||
917 view->lineno >= view->offset + view->height) {
918 if (steps < 0 && -steps > view->offset) {
919 steps = -view->offset;
920
921 } else if (steps > 0) {
922 if (view->lineno == view->lines - 1 &&
923 view->lines > view->height) {
924 steps = view->lines - view->offset - 1;
925 if (steps >= view->height)
926 steps -= view->height - 1;
927 }
928 }
929
930 do_scroll_view(view, steps);
931 return;
932 }
933
934 /* Draw the current line */
935 view->ops->draw(view, view->lineno - view->offset);
936
937 redrawwin(view->win);
938 wrefresh(view->win);
939 report("");
940 }
941
942
943 /*
944 * Incremental updating
945 */
946
947 static bool
948 begin_update(struct view *view)
949 {
950 char *id = view->id;
951
952 if (opt_cmd[0]) {
953 string_copy(view->cmd, opt_cmd);
954 opt_cmd[0] = 0;
955 /* When running random commands, the view ref could have become
956 * invalid so clear it. */
957 view->ref[0] = 0;
958 } else {
959 if (snprintf(view->cmd, sizeof(view->cmd), view->cmdfmt,
960 id, id, id) >= sizeof(view->cmd))
961 return FALSE;
962 }
963
964 /* Special case for the pager view. */
965 if (opt_pipe) {
966 view->pipe = opt_pipe;
967 opt_pipe = NULL;
968 } else {
969 view->pipe = popen(view->cmd, "r");
970 }
971
972 if (!view->pipe)
973 return FALSE;
974
975 set_nonblocking_input(TRUE);
976
977 view->offset = 0;
978 view->lines = 0;
979 view->lineno = 0;
980 string_copy(view->vid, id);
981
982 if (view->line) {
983 int i;
984
985 for (i = 0; i < view->lines; i++)
986 if (view->line[i])
987 free(view->line[i]);
988
989 free(view->line);
990 view->line = NULL;
991 }
992
993 view->start_time = time(NULL);
994
995 return TRUE;
996 }
997
998 static void
999 end_update(struct view *view)
1000 {
1001 if (!view->pipe)
1002 return;
1003 set_nonblocking_input(FALSE);
1004 pclose(view->pipe);
1005 view->pipe = NULL;
1006 }
1007
1008 static bool
1009 update_view(struct view *view)
1010 {
1011 char buffer[BUFSIZ];
1012 char *line;
1013 void **tmp;
1014 /* The number of lines to read. If too low it will cause too much
1015 * redrawing (and possible flickering), if too high responsiveness
1016 * will suffer. */
1017 unsigned long lines = view->height;
1018 int redraw_from = -1;
1019
1020 if (!view->pipe)
1021 return TRUE;
1022
1023 /* Only redraw if lines are visible. */
1024 if (view->offset + view->height >= view->lines)
1025 redraw_from = view->lines - view->offset;
1026
1027 tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines));
1028 if (!tmp)
1029 goto alloc_error;
1030
1031 view->line = tmp;
1032
1033 while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
1034 int linelen;
1035
1036 linelen = strlen(line);
1037 if (linelen)
1038 line[linelen - 1] = 0;
1039
1040 if (!view->ops->read(view, line))
1041 goto alloc_error;
1042
1043 if (lines-- == 1)
1044 break;
1045 }
1046
1047 {
1048 int digits;
1049
1050 lines = view->lines;
1051 for (digits = 0; lines; digits++)
1052 lines /= 10;
1053
1054 /* Keep the displayed view in sync with line number scaling. */
1055 if (digits != view->digits) {
1056 view->digits = digits;
1057 redraw_from = 0;
1058 }
1059 }
1060
1061 /* CPU hogilicious! */
1062 update_view_title(view);
1063
1064 if (redraw_from >= 0) {
1065 /* If this is an incremental update, redraw the previous line
1066 * since for commits some members could have changed when
1067 * loading the main view. */
1068 if (redraw_from > 0)
1069 redraw_from--;
1070
1071 /* Incrementally draw avoids flickering. */
1072 redraw_view_from(view, redraw_from);
1073 }
1074
1075 if (ferror(view->pipe)) {
1076 report("Failed to read: %s", strerror(errno));
1077 goto end;
1078
1079 } else if (feof(view->pipe)) {
1080 time_t secs = time(NULL) - view->start_time;
1081
1082 if (view == VIEW(REQ_VIEW_HELP)) {
1083 report("%s", HELP);
1084 goto end;
1085 }
1086
1087 report("Loaded %d lines in %ld second%s", view->lines, secs,
1088 secs == 1 ? "" : "s");
1089 goto end;
1090 }
1091
1092 return TRUE;
1093
1094 alloc_error:
1095 report("Allocation failure");
1096
1097 end:
1098 end_update(view);
1099 return FALSE;
1100 }
1101
1102 enum open_flags {
1103 OPEN_DEFAULT = 0, /* Use default view switching. */
1104 OPEN_SPLIT = 1, /* Split current view. */
1105 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1106 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1107 };
1108
1109 static void
1110 open_view(struct view *prev, enum request request, enum open_flags flags)
1111 {
1112 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1113 bool split = !!(flags & OPEN_SPLIT);
1114 bool reload = !!(flags & OPEN_RELOAD);
1115 struct view *view = VIEW(request);
1116 struct view *displayed;
1117 int nviews;
1118
1119 /* Cycle between displayed views and count the views. */
1120 foreach_view (displayed, nviews) {
1121 if (prev != view &&
1122 view == displayed &&
1123 !strcmp(view->vid, prev->vid)) {
1124 current_view = nviews;
1125 /* Blur out the title of the previous view. */
1126 update_view_title(prev);
1127 report("Switching to %s view", view->name);
1128 return;
1129 }
1130 }
1131
1132 if (view == prev && nviews == 1 && !reload) {
1133 report("Already in %s view", view->name);
1134 return;
1135 }
1136
1137 if ((reload || strcmp(view->vid, view->id)) &&
1138 !begin_update(view)) {
1139 report("Failed to load %s view", view->name);
1140 return;
1141 }
1142
1143 if (split) {
1144 display[current_view + 1] = view;
1145 if (!backgrounded)
1146 current_view++;
1147 } else {
1148 /* Maximize the current view. */
1149 memset(display, 0, sizeof(display));
1150 current_view = 0;
1151 display[current_view] = view;
1152 }
1153
1154 resize_display();
1155
1156 if (split && prev->lineno - prev->offset > prev->height) {
1157 /* Take the title line into account. */
1158 int lines = prev->lineno - prev->height + 1;
1159
1160 /* Scroll the view that was split if the current line is
1161 * outside the new limited view. */
1162 do_scroll_view(prev, lines);
1163 }
1164
1165 if (prev && view != prev) {
1166 /* "Blur" the previous view. */
1167 update_view_title(prev);
1168
1169 /* Continue loading split views in the background. */
1170 if (!split)
1171 end_update(prev);
1172 }
1173
1174 if (view->pipe) {
1175 /* Clear the old view and let the incremental updating refill
1176 * the screen. */
1177 wclear(view->win);
1178 report("Loading...");
1179 } else {
1180 redraw_view(view);
1181 report("");
1182 }
1183 }
1184
1185
1186 /*
1187 * User request switch noodle
1188 */
1189
1190 static int
1191 view_driver(struct view *view, enum request request)
1192 {
1193 int i;
1194
1195 switch (request) {
1196 case REQ_MOVE_UP:
1197 case REQ_MOVE_DOWN:
1198 case REQ_MOVE_PAGE_UP:
1199 case REQ_MOVE_PAGE_DOWN:
1200 case REQ_MOVE_FIRST_LINE:
1201 case REQ_MOVE_LAST_LINE:
1202 move_view(view, request);
1203 break;
1204
1205 case REQ_SCROLL_LINE_DOWN:
1206 case REQ_SCROLL_LINE_UP:
1207 case REQ_SCROLL_PAGE_DOWN:
1208 case REQ_SCROLL_PAGE_UP:
1209 scroll_view(view, request);
1210 break;
1211
1212 case REQ_VIEW_MAIN:
1213 case REQ_VIEW_DIFF:
1214 case REQ_VIEW_LOG:
1215 case REQ_VIEW_HELP:
1216 case REQ_VIEW_PAGER:
1217 open_view(view, request, OPEN_DEFAULT);
1218 break;
1219
1220 case REQ_ENTER:
1221 if (!view->lines) {
1222 report("Nothing to enter");
1223 break;
1224 }
1225 return view->ops->enter(view);
1226
1227 case REQ_VIEW_NEXT:
1228 {
1229 int nviews = display[1] ? 2 : 1;
1230 int next_view = (current_view + 1) % nviews;
1231
1232 if (next_view == current_view) {
1233 report("Only one view is displayed");
1234 break;
1235 }
1236
1237 current_view = next_view;
1238 /* Blur out the title of the previous view. */
1239 update_view_title(view);
1240 report("Switching to %s view", display[current_view]->name);
1241 break;
1242 }
1243 case REQ_TOGGLE_LINE_NUMBERS:
1244 opt_line_number = !opt_line_number;
1245 redraw_view(view);
1246 break;
1247
1248 case REQ_PROMPT:
1249 /* Always reload^Wrerun commands from the prompt. */
1250 open_view(view, opt_request, OPEN_RELOAD);
1251 break;
1252
1253 case REQ_STOP_LOADING:
1254 foreach_view (view, i) {
1255 if (view->pipe)
1256 report("Stopped loaded of %s view", view->name),
1257 end_update(view);
1258 }
1259 break;
1260
1261 case REQ_SHOW_VERSION:
1262 report("Version: %s", VERSION);
1263 return TRUE;
1264
1265 case REQ_SCREEN_REDRAW:
1266 redraw_view(view);
1267 break;
1268
1269 case REQ_SCREEN_UPDATE:
1270 doupdate();
1271 return TRUE;
1272
1273 case REQ_QUIT:
1274 return FALSE;
1275
1276 default:
1277 /* An unknown key will show most commonly used commands. */
1278 report("%s", HELP);
1279 return TRUE;
1280 }
1281
1282 return TRUE;
1283 }
1284
1285
1286 /*
1287 * View backend handlers
1288 */
1289
1290 static bool
1291 pager_draw(struct view *view, unsigned int lineno)
1292 {
1293 enum line_type type;
1294 char *line;
1295 int linelen;
1296 int attr;
1297
1298 if (view->offset + lineno >= view->lines)
1299 return FALSE;
1300
1301 line = view->line[view->offset + lineno];
1302 type = get_line_type(line);
1303
1304 if (view->offset + lineno == view->lineno) {
1305 if (type == LINE_COMMIT) {
1306 string_copy(view->ref, line + 7);
1307 string_copy(ref_commit, view->ref);
1308 }
1309
1310 type = LINE_CURSOR;
1311 }
1312
1313 attr = get_line_attr(type);
1314 wattrset(view->win, attr);
1315
1316 linelen = strlen(line);
1317 linelen = MIN(linelen, view->width);
1318
1319 if (opt_line_number) {
1320 static char indent[] = " ";
1321 unsigned long real_lineno = view->offset + lineno + 1;
1322 int col = 0;
1323
1324 if (real_lineno == 1 || (real_lineno % opt_num_interval) == 0)
1325 mvwprintw(view->win, lineno, 0, "%.*d", view->digits, real_lineno);
1326
1327 else if (view->digits < sizeof(indent))
1328 mvwaddnstr(view->win, lineno, 0, indent, view->digits);
1329
1330 waddstr(view->win, ": ");
1331
1332 while (line) {
1333 if (*line == '\t') {
1334 waddnstr(view->win, " ", 8 - (col % 8));
1335 col += 8 - (col % 8);
1336 line++;
1337
1338 } else {
1339 char *tab = strchr(line, '\t');
1340
1341 if (tab)
1342 waddnstr(view->win, line, tab - line);
1343 else
1344 waddstr(view->win, line);
1345 col += tab - line;
1346 line = tab;
1347 }
1348 }
1349 waddstr(view->win, line);
1350
1351 } else {
1352 #if 0
1353 /* NOTE: Code for only highlighting the text on the cursor line.
1354 * Kept since I've not yet decided whether to highlight the
1355 * entire line or not. --fonseca */
1356 /* No empty lines makes cursor drawing and clearing implicit. */
1357 if (!*line)
1358 line = " ", linelen = 1;
1359 #endif
1360 mvwaddnstr(view->win, lineno, 0, line, linelen);
1361 }
1362
1363 /* Paint the rest of the line if it's the cursor line. */
1364 if (type == LINE_CURSOR)
1365 wchgat(view->win, -1, 0, type, NULL);
1366
1367 return TRUE;
1368 }
1369
1370 static bool
1371 pager_read(struct view *view, char *line)
1372 {
1373 /* For some reason the piped man page has many empty lines
1374 * so skip successive emptys lines to work around it. */
1375 if (view == VIEW(REQ_VIEW_HELP) &&
1376 !*line &&
1377 view->lines &&
1378 !*((char *) view->line[view->lines - 1]))
1379 return TRUE;
1380
1381 view->line[view->lines] = strdup(line);
1382 if (!view->line[view->lines])
1383 return FALSE;
1384
1385 view->lines++;
1386 return TRUE;
1387 }
1388
1389 static bool
1390 pager_enter(struct view *view)
1391 {
1392 char *line = view->line[view->lineno];
1393
1394 if (get_line_type(line) == LINE_COMMIT) {
1395 open_view(view, REQ_VIEW_DIFF, OPEN_DEFAULT);
1396 }
1397
1398 return TRUE;
1399 }
1400
1401
1402 static struct view_ops pager_ops = {
1403 pager_draw,
1404 pager_read,
1405 pager_enter,
1406 };
1407
1408 static bool
1409 main_draw(struct view *view, unsigned int lineno)
1410 {
1411 char buf[DATE_COLS + 1];
1412 struct commit *commit;
1413 enum line_type type;
1414 int cols = 0;
1415 size_t timelen;
1416
1417 if (view->offset + lineno >= view->lines)
1418 return FALSE;
1419
1420 commit = view->line[view->offset + lineno];
1421 if (!*commit->author)
1422 return FALSE;
1423
1424 if (view->offset + lineno == view->lineno) {
1425 string_copy(view->ref, commit->id);
1426 string_copy(ref_commit, view->ref);
1427 type = LINE_CURSOR;
1428 } else {
1429 type = LINE_MAIN_COMMIT;
1430 }
1431
1432 wmove(view->win, lineno, cols);
1433 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
1434
1435 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
1436 waddnstr(view->win, buf, timelen);
1437 waddstr(view->win, " ");
1438
1439 cols += DATE_COLS;
1440 wmove(view->win, lineno, cols);
1441 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
1442
1443 if (strlen(commit->author) > 19) {
1444 waddnstr(view->win, commit->author, 18);
1445 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
1446 waddch(view->win, '~');
1447 } else {
1448 waddstr(view->win, commit->author);
1449 }
1450
1451 cols += 20;
1452 wattrset(view->win, A_NORMAL);
1453 mvwaddch(view->win, lineno, cols, ACS_LTEE);
1454 wattrset(view->win, get_line_attr(type));
1455 mvwaddstr(view->win, lineno, cols + 2, commit->title);
1456 wattrset(view->win, A_NORMAL);
1457
1458 return TRUE;
1459 }
1460
1461 /* Reads git log --pretty=raw output and parses it into the commit struct. */
1462 static bool
1463 main_read(struct view *view, char *line)
1464 {
1465 enum line_type type = get_line_type(line);
1466 struct commit *commit;
1467
1468 switch (type) {
1469 case LINE_COMMIT:
1470 commit = calloc(1, sizeof(struct commit));
1471 if (!commit)
1472 return FALSE;
1473
1474 line += STRING_SIZE("commit ");
1475
1476 view->line[view->lines++] = commit;
1477 string_copy(commit->id, line);
1478 break;
1479
1480 case LINE_AUTHOR:
1481 {
1482 char *ident = line + STRING_SIZE("author ");
1483 char *end = strchr(ident, '<');
1484
1485 if (end) {
1486 for (; end > ident && isspace(end[-1]); end--) ;
1487 *end = 0;
1488 }
1489
1490 commit = view->line[view->lines - 1];
1491 string_copy(commit->author, ident);
1492
1493 /* Parse epoch and timezone */
1494 if (end) {
1495 char *secs = strchr(end + 1, '>');
1496 char *zone;
1497 time_t time;
1498
1499 if (!secs || secs[1] != ' ')
1500 break;
1501
1502 secs += 2;
1503 time = (time_t) atol(secs);
1504 zone = strchr(secs, ' ');
1505 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
1506 long tz;
1507
1508 zone++;
1509 tz = ('0' - zone[1]) * 60 * 60 * 10;
1510 tz += ('0' - zone[2]) * 60 * 60;
1511 tz += ('0' - zone[3]) * 60;
1512 tz += ('0' - zone[4]) * 60;
1513
1514 if (zone[0] == '-')
1515 tz = -tz;
1516
1517 time -= tz;
1518 }
1519 gmtime_r(&time, &commit->time);
1520 }
1521 break;
1522 }
1523 default:
1524 /* We should only ever end up here if there has already been a
1525 * commit line, however, be safe. */
1526 if (view->lines == 0)
1527 break;
1528
1529 /* Fill in the commit title if it has not already been set. */
1530 commit = view->line[view->lines - 1];
1531 if (commit->title[0])
1532 break;
1533
1534 /* Require titles to start with a non-space character at the
1535 * offset used by git log. */
1536 if (strncmp(line, " ", 4) ||
1537 isspace(line[5]))
1538 break;
1539
1540 string_copy(commit->title, line + 4);
1541 }
1542
1543 return TRUE;
1544 }
1545
1546 static bool
1547 main_enter(struct view *view)
1548 {
1549 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
1550 return TRUE;
1551 }
1552
1553 static struct view_ops main_ops = {
1554 main_draw,
1555 main_read,
1556 main_enter,
1557 };
1558
1559 /*
1560 * Status management
1561 */
1562
1563 /* Whether or not the curses interface has been initialized. */
1564 bool cursed = FALSE;
1565
1566 /* The status window is used for polling keystrokes. */
1567 static WINDOW *status_win;
1568
1569 /* Update status and title window. */
1570 static void
1571 report(const char *msg, ...)
1572 {
1573 va_list args;
1574
1575 va_start(args, msg);
1576
1577 /* Update the title window first, so the cursor ends up in the status
1578 * window. */
1579 update_view_title(display[current_view]);
1580
1581 werase(status_win);
1582 wmove(status_win, 0, 0);
1583 vwprintw(status_win, msg, args);
1584 wrefresh(status_win);
1585
1586 va_end(args);
1587 }
1588
1589 /* Controls when nodelay should be in effect when polling user input. */
1590 static void
1591 set_nonblocking_input(int loading)
1592 {
1593 /* The number of loading views. */
1594 static unsigned int nloading;
1595
1596 if (loading == TRUE) {
1597 if (nloading++ == 0)
1598 nodelay(status_win, TRUE);
1599 return;
1600 }
1601
1602 if (nloading-- == 1)
1603 nodelay(status_win, FALSE);
1604 }
1605
1606 static void
1607 init_display(void)
1608 {
1609 int x, y;
1610
1611 /* Initialize the curses library */
1612 if (isatty(STDIN_FILENO)) {
1613 cursed = !!initscr();
1614 } else {
1615 /* Leave stdin and stdout alone when acting as a pager. */
1616 FILE *io = fopen("/dev/tty", "r+");
1617
1618 cursed = !!newterm(NULL, io, io);
1619 }
1620
1621 if (!cursed)
1622 die("Failed to initialize curses");
1623
1624 nonl(); /* Tell curses not to do NL->CR/NL on output */
1625 cbreak(); /* Take input chars one at a time, no wait for \n */
1626 noecho(); /* Don't echo input */
1627 leaveok(stdscr, TRUE);
1628
1629 if (has_colors())
1630 init_colors();
1631
1632 getmaxyx(stdscr, y, x);
1633 status_win = newwin(1, 0, y - 1, 0);
1634 if (!status_win)
1635 die("Failed to create status window");
1636
1637 /* Enable keyboard mapping */
1638 keypad(status_win, TRUE);
1639 wbkgdset(status_win, get_line_attr(LINE_STATUS));
1640 }
1641
1642 /*
1643 * Main
1644 */
1645
1646 static void
1647 quit(int sig)
1648 {
1649 /* XXX: Restore tty modes and let the OS cleanup the rest! */
1650 if (cursed)
1651 endwin();
1652 exit(0);
1653 }
1654
1655 static void die(const char *err, ...)
1656 {
1657 va_list args;
1658
1659 endwin();
1660
1661 va_start(args, err);
1662 fputs("tig: ", stderr);
1663 vfprintf(stderr, err, args);
1664 fputs("\n", stderr);
1665 va_end(args);
1666
1667 exit(1);
1668 }
1669
1670 int
1671 main(int argc, char *argv[])
1672 {
1673 enum request request;
1674
1675 signal(SIGINT, quit);
1676
1677 if (!parse_options(argc, argv))
1678 return 0;
1679
1680 request = opt_request;
1681
1682 init_display();
1683
1684 while (view_driver(display[current_view], request)) {
1685 struct view *view;
1686 int key;
1687 int i;
1688
1689 foreach_view (view, i)
1690 update_view(view);
1691
1692 /* Refresh, accept single keystroke of input */
1693 key = wgetch(status_win);
1694 request = get_request(key);
1695
1696 if (request == REQ_PROMPT) {
1697 report(":");
1698 /* Temporarily switch to line-oriented and echoed
1699 * input. */
1700 nocbreak();
1701 echo();
1702
1703 if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
1704 memcpy(opt_cmd, "git ", 4);
1705 opt_request = REQ_VIEW_PAGER;
1706 } else {
1707 request = ERR;
1708 }
1709
1710 noecho();
1711 cbreak();
1712 }
1713 }
1714
1715 quit(0);
1716
1717 return 0;
1718 }
1719
1720 /**
1721 * TODO
1722 * ----
1723 * Features that should be explored.
1724 *
1725 * - Terminal resizing support. I am yet to figure out whether catching
1726 * SIGWINCH is preferred over using ncurses' built-in support for resizing.
1727 *
1728 * - Locale support.
1729 *
1730 * COPYRIGHT
1731 * ---------
1732 * Copyright (c) Jonas Fonseca <fonseca@diku.dk>, 2006
1733 *
1734 * This program is free software; you can redistribute it and/or modify
1735 * it under the terms of the GNU General Public License as published by
1736 * the Free Software Foundation; either version 2 of the License, or
1737 * (at your option) any later version.
1738 *
1739 * SEE ALSO
1740 * --------
1741 * [verse]
1742 * link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)],
1743 * link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)]
1744 * gitk(1): git repository browser written using tcl/tk,
1745 * gitview(1): git repository browser written using python/gtk.
1746 **/
Full-screen terminal Git browser.