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Oops, no need to #include <readline/readline>
[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(bool loading);
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_RESIZE,
94 REQ_SCREEN_UPDATE,
95 REQ_SHOW_VERSION,
96 REQ_STOP_LOADING,
97 REQ_TOGGLE_LINE_NUMBERS,
98 REQ_VIEW_NEXT,
99
100 REQ_MOVE_UP,
101 REQ_MOVE_DOWN,
102 REQ_MOVE_PAGE_UP,
103 REQ_MOVE_PAGE_DOWN,
104 REQ_MOVE_FIRST_LINE,
105 REQ_MOVE_LAST_LINE,
106
107 REQ_SCROLL_LINE_UP,
108 REQ_SCROLL_LINE_DOWN,
109 REQ_SCROLL_PAGE_UP,
110 REQ_SCROLL_PAGE_DOWN,
111 };
112
113 struct commit {
114 char id[41]; /* SHA1 ID. */
115 char title[75]; /* The first line of the commit message. */
116 char author[75]; /* The author of the commit. */
117 struct tm time; /* Date from the author ident. */
118 };
119
120 /*
121 * String helpers
122 */
123
124 static inline void
125 string_ncopy(char *dst, char *src, int dstlen)
126 {
127 strncpy(dst, src, dstlen - 1);
128 dst[dstlen - 1] = 0;
129
130 }
131
132 /* Shorthand for safely copying into a fixed buffer. */
133 #define string_copy(dst, src) \
134 string_ncopy(dst, src, sizeof(dst))
135
136 /* Shell quoting
137 *
138 * NOTE: The following is a slightly modified copy of the git project's shell
139 * quoting routines found in the quote.c file.
140 *
141 * Help to copy the thing properly quoted for the shell safety. any single
142 * quote is replaced with '\'', any exclamation point is replaced with '\!',
143 * and the whole thing is enclosed in a
144 *
145 * E.g.
146 * original sq_quote result
147 * name ==> name ==> 'name'
148 * a b ==> a b ==> 'a b'
149 * a'b ==> a'\''b ==> 'a'\''b'
150 * a!b ==> a'\!'b ==> 'a'\!'b'
151 */
152
153 static size_t
154 sq_quote(char buf[SIZEOF_CMD], size_t bufsize, const char *src)
155 {
156 char c;
157
158 #define BUFPUT(x) ( (bufsize < SIZEOF_CMD) && (buf[bufsize++] = (x)) )
159
160 BUFPUT('\'');
161 while ((c = *src++)) {
162 if (c == '\'' || c == '!') {
163 BUFPUT('\'');
164 BUFPUT('\\');
165 BUFPUT(c);
166 BUFPUT('\'');
167 } else {
168 BUFPUT(c);
169 }
170 }
171 BUFPUT('\'');
172
173 return bufsize;
174 }
175
176
177 /**
178 * OPTIONS
179 * -------
180 **/
181
182 static int opt_line_number = FALSE;
183 static int opt_num_interval = NUMBER_INTERVAL;
184 static enum request opt_request = REQ_VIEW_MAIN;
185 static char opt_cmd[SIZEOF_CMD] = "";
186 static FILE *opt_pipe = NULL;
187
188 /* Returns the index of log or diff command or -1 to exit. */
189 static bool
190 parse_options(int argc, char *argv[])
191 {
192 int i;
193
194 for (i = 1; i < argc; i++) {
195 char *opt = argv[i];
196
197 /**
198 * -l::
199 * Start up in log view using the internal log command.
200 **/
201 if (!strcmp(opt, "-l")) {
202 opt_request = REQ_VIEW_LOG;
203 continue;
204 }
205
206 /**
207 * -d::
208 * Start up in diff view using the internal diff command.
209 **/
210 if (!strcmp(opt, "-d")) {
211 opt_request = REQ_VIEW_DIFF;
212 continue;
213 }
214
215 /**
216 * -n[INTERVAL], --line-number[=INTERVAL]::
217 * Prefix line numbers in log and diff view.
218 * Optionally, with interval different than each line.
219 **/
220 if (!strncmp(opt, "-n", 2) ||
221 !strncmp(opt, "--line-number", 13)) {
222 char *num = opt;
223
224 if (opt[1] == 'n') {
225 num = opt + 2;
226
227 } else if (opt[STRING_SIZE("--line-number")] == '=') {
228 num = opt + STRING_SIZE("--line-number=");
229 }
230
231 if (isdigit(*num))
232 opt_num_interval = atoi(num);
233
234 opt_line_number = TRUE;
235 continue;
236 }
237
238 /**
239 * -v, --version::
240 * Show version and exit.
241 **/
242 if (!strcmp(opt, "-v") ||
243 !strcmp(opt, "--version")) {
244 printf("tig version %s\n", VERSION);
245 return FALSE;
246 }
247
248 /**
249 * \--::
250 * End of tig(1) options. Useful when specifying commands
251 * for the main view. Example:
252 *
253 * $ tig -- --since=1.month
254 **/
255 if (!strcmp(opt, "--")) {
256 i++;
257 break;
258 }
259
260 /**
261 * log [options]::
262 * Open log view using the given git log options.
263 *
264 * diff [options]::
265 * Open diff view using the given git diff options.
266 *
267 * show [options]::
268 * Open diff view using the given git show options.
269 **/
270 if (!strcmp(opt, "log") ||
271 !strcmp(opt, "diff") ||
272 !strcmp(opt, "show")) {
273 opt_request = opt[0] == 'l'
274 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
275 break;
276 }
277
278 /* Make stuff like:
279 *
280 * $ tig tag-1.0..HEAD
281 *
282 * work. */
283 if (opt[0] && opt[0] != '-')
284 break;
285
286 die("unknown command '%s'", opt);
287 }
288
289 if (!isatty(STDIN_FILENO)) {
290 /**
291 * Pager mode
292 * ~~~~~~~~~~
293 * If stdin is a pipe, any log or diff options will be ignored and the
294 * pager view will be opened loading data from stdin. The pager mode
295 * can be used for colorizing output from various git commands.
296 *
297 * Example on how to colorize the output of git-show(1):
298 *
299 * $ git show | tig
300 **/
301 opt_request = REQ_VIEW_PAGER;
302 opt_pipe = stdin;
303
304 } else if (i < argc) {
305 size_t buf_size;
306
307 /**
308 * Git command options
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 /* Use the ncurses SIGWINCH handler. */
463 { KEY_RESIZE, REQ_SCREEN_RESIZE },
464 };
465
466 static enum request
467 get_request(int key)
468 {
469 int i;
470
471 for (i = 0; i < ARRAY_SIZE(keymap); i++)
472 if (keymap[i].alias == key)
473 return keymap[i].request;
474
475 return (enum request) key;
476 }
477
478
479 /*
480 * Line-oriented content detection.
481 */
482
483 #define LINE_INFO \
484 /* Line type String to match Foreground Background Attributes
485 * --------- --------------- ---------- ---------- ---------- */ \
486 /* Diff markup */ \
487 LINE(DIFF, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
488 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
489 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
490 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
491 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
492 LINE(DIFF_OLDMODE, "old mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
493 LINE(DIFF_NEWMODE, "new mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
494 LINE(DIFF_COPY, "copy ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
495 LINE(DIFF_RENAME, "rename ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
496 LINE(DIFF_SIM, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
497 LINE(DIFF_DISSIM, "dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
498 /* Pretty print commit header */ \
499 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
500 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
501 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
502 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
503 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
504 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
505 /* Raw commit header */ \
506 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
507 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
508 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
509 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
510 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
511 /* Misc */ \
512 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
513 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
514 /* UI colors */ \
515 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
516 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
517 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
518 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
519 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
520 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
521 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
522 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
523 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0),
524
525 enum line_type {
526 #define LINE(type, line, fg, bg, attr) \
527 LINE_##type
528 LINE_INFO
529 #undef LINE
530 };
531
532 struct line_info {
533 char *line; /* The start of line to match. */
534 int linelen; /* Size of string to match. */
535 int fg, bg, attr; /* Color and text attributes for the lines. */
536 };
537
538 static struct line_info line_info[] = {
539 #define LINE(type, line, fg, bg, attr) \
540 { (line), STRING_SIZE(line), (fg), (bg), (attr) }
541 LINE_INFO
542 #undef LINE
543 };
544
545 static enum line_type
546 get_line_type(char *line)
547 {
548 int linelen = strlen(line);
549 enum line_type type;
550
551 for (type = 0; type < ARRAY_SIZE(line_info); type++)
552 /* Case insensitive search matches Signed-off-by lines better. */
553 if (linelen >= line_info[type].linelen &&
554 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
555 return type;
556
557 return LINE_DEFAULT;
558 }
559
560 static inline int
561 get_line_attr(enum line_type type)
562 {
563 assert(type < ARRAY_SIZE(line_info));
564 return COLOR_PAIR(type) | line_info[type].attr;
565 }
566
567 static void
568 init_colors(void)
569 {
570 int default_bg = COLOR_BLACK;
571 int default_fg = COLOR_WHITE;
572 enum line_type type;
573
574 start_color();
575
576 if (use_default_colors() != ERR) {
577 default_bg = -1;
578 default_fg = -1;
579 }
580
581 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
582 struct line_info *info = &line_info[type];
583 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
584 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
585
586 init_pair(type, fg, bg);
587 }
588 }
589
590
591 /**
592 * ENVIRONMENT VARIABLES
593 * ---------------------
594 * It is possible to alter which commands are used for the different views.
595 * If for example you prefer commits in the main to be sorted by date and
596 * only show 500 commits, use:
597 *
598 * $ TIG_MAIN_CMD="git log --date-order -n500 --pretty=raw %s" tig
599 *
600 * Or set the variable permanently in your environment.
601 *
602 * Notice, how `%s` is used to specify the commit reference. There can
603 * be a maximum of 5 `%s` ref specifications.
604 *
605 * TIG_DIFF_CMD::
606 * The command used for the diff view. By default, git show is used
607 * as a backend.
608 *
609 * TIG_LOG_CMD::
610 * The command used for the log view.
611 *
612 * TIG_MAIN_CMD::
613 * The command used for the main view. Note, you must always specify
614 * the option: `--pretty=raw` since the main view parser expects to
615 * read that format.
616 **/
617
618 #define TIG_DIFF_CMD \
619 "git show --patch-with-stat --find-copies-harder -B -C %s"
620
621 #define TIG_LOG_CMD \
622 "git log --cc --stat -n100 %s"
623
624 #define TIG_MAIN_CMD \
625 "git log --topo-order --stat --pretty=raw %s"
626
627 /* We silently ignore that the following are also exported. */
628
629 #define TIG_HELP_CMD \
630 "man tig 2> /dev/null"
631
632 #define TIG_PAGER_CMD \
633 ""
634
635
636 /*
637 * Viewer
638 */
639
640 struct view {
641 const char *name; /* View name */
642 char *cmd_fmt; /* Default command line format */
643 char *cmd_env; /* Command line set via environment */
644 char *id; /* Points to either of ref_{head,commit} */
645 size_t objsize; /* Size of objects in the line index */
646
647 struct view_ops {
648 /* Draw one line; @lineno must be < view->height. */
649 bool (*draw)(struct view *view, unsigned int lineno);
650 /* Read one line; updates view->line. */
651 bool (*read)(struct view *view, char *line);
652 /* Depending on view, change display based on current line. */
653 bool (*enter)(struct view *view);
654 } *ops;
655
656 char cmd[SIZEOF_CMD]; /* Command buffer */
657 char ref[SIZEOF_REF]; /* Hovered commit reference */
658 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
659
660 int height, width; /* The width and height of the main window */
661 WINDOW *win; /* The main window */
662 WINDOW *title; /* The title window living below the main window */
663
664 /* Navigation */
665 unsigned long offset; /* Offset of the window top */
666 unsigned long lineno; /* Current line number */
667
668 /* Buffering */
669 unsigned long lines; /* Total number of lines */
670 void **line; /* Line index; each line contains user data */
671 unsigned int digits; /* Number of digits in the lines member. */
672
673 /* Loading */
674 FILE *pipe;
675 time_t start_time;
676 };
677
678 static struct view_ops pager_ops;
679 static struct view_ops main_ops;
680
681 char ref_head[SIZEOF_REF] = "HEAD";
682 char ref_commit[SIZEOF_REF] = "HEAD";
683
684 #define VIEW_STR(name, cmd, env, ref, objsize, ops) \
685 { name, cmd, #env, ref, objsize, ops }
686
687 #define VIEW_(id, name, ops, ref, objsize) \
688 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, objsize, ops)
689
690 static struct view views[] = {
691 VIEW_(MAIN, "main", &main_ops, ref_head, sizeof(struct commit)),
692 VIEW_(DIFF, "diff", &pager_ops, ref_commit, sizeof(char)),
693 VIEW_(LOG, "log", &pager_ops, ref_head, sizeof(char)),
694 VIEW_(HELP, "help", &pager_ops, ref_head, sizeof(char)),
695 VIEW_(PAGER, "pager", &pager_ops, "static", sizeof(char)),
696 };
697
698 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
699
700 /* The display array of active views and the index of the current view. */
701 static struct view *display[2];
702 static unsigned int current_view;
703
704 #define foreach_view(view, i) \
705 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
706
707
708 static void
709 redraw_view_from(struct view *view, int lineno)
710 {
711 assert(0 <= lineno && lineno < view->height);
712
713 for (; lineno < view->height; lineno++) {
714 if (!view->ops->draw(view, lineno))
715 break;
716 }
717
718 redrawwin(view->win);
719 wrefresh(view->win);
720 }
721
722 static void
723 redraw_view(struct view *view)
724 {
725 wclear(view->win);
726 redraw_view_from(view, 0);
727 }
728
729 static void
730 resize_display(void)
731 {
732 int offset, i;
733 struct view *base = display[0];
734 struct view *view = display[1] ? display[1] : display[0];
735
736 /* Setup window dimensions */
737
738 getmaxyx(stdscr, base->height, base->width);
739
740 /* Make room for the status window. */
741 base->height -= 1;
742
743 if (view != base) {
744 /* Horizontal split. */
745 view->width = base->width;
746 view->height = SCALE_SPLIT_VIEW(base->height);
747 base->height -= view->height;
748
749 /* Make room for the title bar. */
750 view->height -= 1;
751 }
752
753 /* Make room for the title bar. */
754 base->height -= 1;
755
756 offset = 0;
757
758 foreach_view (view, i) {
759 if (!view->win) {
760 view->win = newwin(view->height, 0, offset, 0);
761 if (!view->win)
762 die("Failed to create %s view", view->name);
763
764 scrollok(view->win, TRUE);
765
766 view->title = newwin(1, 0, offset + view->height, 0);
767 if (!view->title)
768 die("Failed to create title window");
769
770 } else {
771 wresize(view->win, view->height, view->width);
772 mvwin(view->win, offset, 0);
773 mvwin(view->title, offset + view->height, 0);
774 wrefresh(view->win);
775 }
776
777 offset += view->height + 1;
778 }
779 }
780
781 static void
782 update_view_title(struct view *view)
783 {
784 if (view == display[current_view])
785 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
786 else
787 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
788
789 werase(view->title);
790 wmove(view->title, 0, 0);
791
792 /* [main] ref: 334b506... - commit 6 of 4383 (0%) */
793
794 if (*view->ref)
795 wprintw(view->title, "[%s] ref: %s", view->name, view->ref);
796 else
797 wprintw(view->title, "[%s]", view->name);
798
799 if (view->lines) {
800 char *type = view == VIEW(REQ_VIEW_MAIN) ? "commit" : "line";
801
802 wprintw(view->title, " - %s %d of %d (%d%%)",
803 type,
804 view->lineno + 1,
805 view->lines,
806 (view->lineno + 1) * 100 / view->lines);
807 }
808
809 wrefresh(view->title);
810 }
811
812 /*
813 * Navigation
814 */
815
816 /* Scrolling backend */
817 static void
818 do_scroll_view(struct view *view, int lines)
819 {
820 /* The rendering expects the new offset. */
821 view->offset += lines;
822
823 assert(0 <= view->offset && view->offset < view->lines);
824 assert(lines);
825
826 /* Redraw the whole screen if scrolling is pointless. */
827 if (view->height < ABS(lines)) {
828 redraw_view(view);
829
830 } else {
831 int line = lines > 0 ? view->height - lines : 0;
832 int end = line + ABS(lines);
833
834 wscrl(view->win, lines);
835
836 for (; line < end; line++) {
837 if (!view->ops->draw(view, line))
838 break;
839 }
840 }
841
842 /* Move current line into the view. */
843 if (view->lineno < view->offset) {
844 view->lineno = view->offset;
845 view->ops->draw(view, 0);
846
847 } else if (view->lineno >= view->offset + view->height) {
848 view->lineno = view->offset + view->height - 1;
849 view->ops->draw(view, view->lineno - view->offset);
850 }
851
852 assert(view->offset <= view->lineno && view->lineno < view->lines);
853
854 redrawwin(view->win);
855 wrefresh(view->win);
856 report("");
857 }
858
859 /* Scroll frontend */
860 static void
861 scroll_view(struct view *view, enum request request)
862 {
863 int lines = 1;
864
865 switch (request) {
866 case REQ_SCROLL_PAGE_DOWN:
867 lines = view->height;
868 case REQ_SCROLL_LINE_DOWN:
869 if (view->offset + lines > view->lines)
870 lines = view->lines - view->offset;
871
872 if (lines == 0 || view->offset + view->height >= view->lines) {
873 report("Cannot scroll beyond the last line");
874 return;
875 }
876 break;
877
878 case REQ_SCROLL_PAGE_UP:
879 lines = view->height;
880 case REQ_SCROLL_LINE_UP:
881 if (lines > view->offset)
882 lines = view->offset;
883
884 if (lines == 0) {
885 report("Cannot scroll beyond the first line");
886 return;
887 }
888
889 lines = -lines;
890 break;
891
892 default:
893 die("request %d not handled in switch", request);
894 }
895
896 do_scroll_view(view, lines);
897 }
898
899 /* Cursor moving */
900 static void
901 move_view(struct view *view, enum request request)
902 {
903 int steps;
904
905 switch (request) {
906 case REQ_MOVE_FIRST_LINE:
907 steps = -view->lineno;
908 break;
909
910 case REQ_MOVE_LAST_LINE:
911 steps = view->lines - view->lineno - 1;
912 break;
913
914 case REQ_MOVE_PAGE_UP:
915 steps = view->height > view->lineno
916 ? -view->lineno : -view->height;
917 break;
918
919 case REQ_MOVE_PAGE_DOWN:
920 steps = view->lineno + view->height >= view->lines
921 ? view->lines - view->lineno - 1 : view->height;
922 break;
923
924 case REQ_MOVE_UP:
925 steps = -1;
926 break;
927
928 case REQ_MOVE_DOWN:
929 steps = 1;
930 break;
931
932 default:
933 die("request %d not handled in switch", request);
934 }
935
936 if (steps <= 0 && view->lineno == 0) {
937 report("Cannot move beyond the first line");
938 return;
939
940 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
941 report("Cannot move beyond the last line");
942 return;
943 }
944
945 /* Move the current line */
946 view->lineno += steps;
947 assert(0 <= view->lineno && view->lineno < view->lines);
948
949 /* Repaint the old "current" line if we be scrolling */
950 if (ABS(steps) < view->height) {
951 int prev_lineno = view->lineno - steps - view->offset;
952
953 wmove(view->win, prev_lineno, 0);
954 wclrtoeol(view->win);
955 view->ops->draw(view, prev_lineno);
956 }
957
958 /* Check whether the view needs to be scrolled */
959 if (view->lineno < view->offset ||
960 view->lineno >= view->offset + view->height) {
961 if (steps < 0 && -steps > view->offset) {
962 steps = -view->offset;
963
964 } else if (steps > 0) {
965 if (view->lineno == view->lines - 1 &&
966 view->lines > view->height) {
967 steps = view->lines - view->offset - 1;
968 if (steps >= view->height)
969 steps -= view->height - 1;
970 }
971 }
972
973 do_scroll_view(view, steps);
974 return;
975 }
976
977 /* Draw the current line */
978 view->ops->draw(view, view->lineno - view->offset);
979
980 redrawwin(view->win);
981 wrefresh(view->win);
982 report("");
983 }
984
985
986 /*
987 * Incremental updating
988 */
989
990 static bool
991 begin_update(struct view *view)
992 {
993 char *id = view->id;
994
995 if (opt_cmd[0]) {
996 string_copy(view->cmd, opt_cmd);
997 opt_cmd[0] = 0;
998 /* When running random commands, the view ref could have become
999 * invalid so clear it. */
1000 view->ref[0] = 0;
1001 } else {
1002 char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1003
1004 if (snprintf(view->cmd, sizeof(view->cmd), format,
1005 id, id, id, id, id) >= sizeof(view->cmd))
1006 return FALSE;
1007 }
1008
1009 /* Special case for the pager view. */
1010 if (opt_pipe) {
1011 view->pipe = opt_pipe;
1012 opt_pipe = NULL;
1013 } else {
1014 view->pipe = popen(view->cmd, "r");
1015 }
1016
1017 if (!view->pipe)
1018 return FALSE;
1019
1020 set_nonblocking_input(TRUE);
1021
1022 view->offset = 0;
1023 view->lines = 0;
1024 view->lineno = 0;
1025 string_copy(view->vid, id);
1026
1027 if (view->line) {
1028 int i;
1029
1030 for (i = 0; i < view->lines; i++)
1031 if (view->line[i])
1032 free(view->line[i]);
1033
1034 free(view->line);
1035 view->line = NULL;
1036 }
1037
1038 view->start_time = time(NULL);
1039
1040 return TRUE;
1041 }
1042
1043 static void
1044 end_update(struct view *view)
1045 {
1046 if (!view->pipe)
1047 return;
1048 set_nonblocking_input(FALSE);
1049 if (view->pipe == stdin)
1050 fclose(view->pipe);
1051 else
1052 pclose(view->pipe);
1053 view->pipe = NULL;
1054 }
1055
1056 static bool
1057 update_view(struct view *view)
1058 {
1059 char buffer[BUFSIZ];
1060 char *line;
1061 void **tmp;
1062 /* The number of lines to read. If too low it will cause too much
1063 * redrawing (and possible flickering), if too high responsiveness
1064 * will suffer. */
1065 unsigned long lines = view->height;
1066 int redraw_from = -1;
1067
1068 if (!view->pipe)
1069 return TRUE;
1070
1071 /* Only redraw if lines are visible. */
1072 if (view->offset + view->height >= view->lines)
1073 redraw_from = view->lines - view->offset;
1074
1075 tmp = realloc(view->line, sizeof(*view->line) * (view->lines + lines));
1076 if (!tmp)
1077 goto alloc_error;
1078
1079 view->line = tmp;
1080
1081 while ((line = fgets(buffer, sizeof(buffer), view->pipe))) {
1082 int linelen;
1083
1084 linelen = strlen(line);
1085 if (linelen)
1086 line[linelen - 1] = 0;
1087
1088 if (!view->ops->read(view, line))
1089 goto alloc_error;
1090
1091 if (lines-- == 1)
1092 break;
1093 }
1094
1095 {
1096 int digits;
1097
1098 lines = view->lines;
1099 for (digits = 0; lines; digits++)
1100 lines /= 10;
1101
1102 /* Keep the displayed view in sync with line number scaling. */
1103 if (digits != view->digits) {
1104 view->digits = digits;
1105 redraw_from = 0;
1106 }
1107 }
1108
1109 if (redraw_from >= 0) {
1110 /* If this is an incremental update, redraw the previous line
1111 * since for commits some members could have changed when
1112 * loading the main view. */
1113 if (redraw_from > 0)
1114 redraw_from--;
1115
1116 /* Incrementally draw avoids flickering. */
1117 redraw_view_from(view, redraw_from);
1118 }
1119
1120 /* Update the title _after_ the redraw so that if the redraw picks up a
1121 * commit reference in view->ref it'll be available here. */
1122 update_view_title(view);
1123
1124 if (ferror(view->pipe)) {
1125 report("Failed to read: %s", strerror(errno));
1126 goto end;
1127
1128 } else if (feof(view->pipe)) {
1129 time_t secs = time(NULL) - view->start_time;
1130
1131 if (view == VIEW(REQ_VIEW_HELP)) {
1132 report("%s", HELP);
1133 goto end;
1134 }
1135
1136 report("Loaded %d lines in %ld second%s", view->lines, secs,
1137 secs == 1 ? "" : "s");
1138 goto end;
1139 }
1140
1141 return TRUE;
1142
1143 alloc_error:
1144 report("Allocation failure");
1145
1146 end:
1147 end_update(view);
1148 return FALSE;
1149 }
1150
1151 enum open_flags {
1152 OPEN_DEFAULT = 0, /* Use default view switching. */
1153 OPEN_SPLIT = 1, /* Split current view. */
1154 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1155 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1156 };
1157
1158 static void
1159 open_view(struct view *prev, enum request request, enum open_flags flags)
1160 {
1161 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1162 bool split = !!(flags & OPEN_SPLIT);
1163 bool reload = !!(flags & OPEN_RELOAD);
1164 struct view *view = VIEW(request);
1165 struct view *displayed;
1166 int nviews;
1167
1168 /* Cycle between displayed views and count the views. */
1169 foreach_view (displayed, nviews) {
1170 if (prev != view &&
1171 view == displayed &&
1172 !strcmp(view->vid, prev->vid)) {
1173 current_view = nviews;
1174 /* Blur out the title of the previous view. */
1175 update_view_title(prev);
1176 report("Switching to %s view", view->name);
1177 return;
1178 }
1179 }
1180
1181 if (view == prev && nviews == 1 && !reload) {
1182 report("Already in %s view", view->name);
1183 return;
1184 }
1185
1186 if ((reload || strcmp(view->vid, view->id)) &&
1187 !begin_update(view)) {
1188 report("Failed to load %s view", view->name);
1189 return;
1190 }
1191
1192 if (split) {
1193 display[current_view + 1] = view;
1194 if (!backgrounded)
1195 current_view++;
1196 } else {
1197 /* Maximize the current view. */
1198 memset(display, 0, sizeof(display));
1199 current_view = 0;
1200 display[current_view] = view;
1201 }
1202
1203 resize_display();
1204
1205 if (split && prev->lineno - prev->offset >= prev->height) {
1206 /* Take the title line into account. */
1207 int lines = prev->lineno - prev->offset - prev->height + 1;
1208
1209 /* Scroll the view that was split if the current line is
1210 * outside the new limited view. */
1211 do_scroll_view(prev, lines);
1212 }
1213
1214 if (prev && view != prev) {
1215 /* "Blur" the previous view. */
1216 update_view_title(prev);
1217
1218 /* Continue loading split views in the background. */
1219 if (!split)
1220 end_update(prev);
1221 }
1222
1223 if (view->pipe) {
1224 /* Clear the old view and let the incremental updating refill
1225 * the screen. */
1226 wclear(view->win);
1227 report("Loading...");
1228 } else {
1229 redraw_view(view);
1230 report("");
1231 }
1232 }
1233
1234
1235 /*
1236 * User request switch noodle
1237 */
1238
1239 static int
1240 view_driver(struct view *view, enum request request)
1241 {
1242 int i;
1243
1244 switch (request) {
1245 case REQ_MOVE_UP:
1246 case REQ_MOVE_DOWN:
1247 case REQ_MOVE_PAGE_UP:
1248 case REQ_MOVE_PAGE_DOWN:
1249 case REQ_MOVE_FIRST_LINE:
1250 case REQ_MOVE_LAST_LINE:
1251 move_view(view, request);
1252 break;
1253
1254 case REQ_SCROLL_LINE_DOWN:
1255 case REQ_SCROLL_LINE_UP:
1256 case REQ_SCROLL_PAGE_DOWN:
1257 case REQ_SCROLL_PAGE_UP:
1258 scroll_view(view, request);
1259 break;
1260
1261 case REQ_VIEW_MAIN:
1262 case REQ_VIEW_DIFF:
1263 case REQ_VIEW_LOG:
1264 case REQ_VIEW_HELP:
1265 case REQ_VIEW_PAGER:
1266 open_view(view, request, OPEN_DEFAULT);
1267 break;
1268
1269 case REQ_ENTER:
1270 if (!view->lines) {
1271 report("Nothing to enter");
1272 break;
1273 }
1274 return view->ops->enter(view);
1275
1276 case REQ_VIEW_NEXT:
1277 {
1278 int nviews = display[1] ? 2 : 1;
1279 int next_view = (current_view + 1) % nviews;
1280
1281 if (next_view == current_view) {
1282 report("Only one view is displayed");
1283 break;
1284 }
1285
1286 current_view = next_view;
1287 /* Blur out the title of the previous view. */
1288 update_view_title(view);
1289 report("Switching to %s view", display[current_view]->name);
1290 break;
1291 }
1292 case REQ_TOGGLE_LINE_NUMBERS:
1293 opt_line_number = !opt_line_number;
1294 redraw_view(view);
1295 break;
1296
1297 case REQ_PROMPT:
1298 /* Always reload^Wrerun commands from the prompt. */
1299 open_view(view, opt_request, OPEN_RELOAD);
1300 break;
1301
1302 case REQ_STOP_LOADING:
1303 foreach_view (view, i) {
1304 if (view->pipe)
1305 report("Stopped loaded of %s view", view->name),
1306 end_update(view);
1307 }
1308 break;
1309
1310 case REQ_SHOW_VERSION:
1311 report("Version: %s", VERSION);
1312 return TRUE;
1313
1314 case REQ_SCREEN_RESIZE:
1315 resize_display();
1316 /* Fall-through */
1317 case REQ_SCREEN_REDRAW:
1318 foreach_view (view, i) {
1319 redraw_view(view);
1320 update_view_title(view);
1321 }
1322 break;
1323
1324 case REQ_SCREEN_UPDATE:
1325 doupdate();
1326 return TRUE;
1327
1328 case REQ_QUIT:
1329 return FALSE;
1330
1331 default:
1332 /* An unknown key will show most commonly used commands. */
1333 report("%s", HELP);
1334 return TRUE;
1335 }
1336
1337 return TRUE;
1338 }
1339
1340
1341 /*
1342 * View backend handlers
1343 */
1344
1345 static bool
1346 pager_draw(struct view *view, unsigned int lineno)
1347 {
1348 enum line_type type;
1349 char *line;
1350 int linelen;
1351 int attr;
1352
1353 if (view->offset + lineno >= view->lines)
1354 return FALSE;
1355
1356 line = view->line[view->offset + lineno];
1357 type = get_line_type(line);
1358
1359 if (view->offset + lineno == view->lineno) {
1360 if (type == LINE_COMMIT) {
1361 string_copy(view->ref, line + 7);
1362 string_copy(ref_commit, view->ref);
1363 }
1364
1365 type = LINE_CURSOR;
1366 }
1367
1368 attr = get_line_attr(type);
1369 wattrset(view->win, attr);
1370
1371 linelen = strlen(line);
1372 linelen = MIN(linelen, view->width);
1373
1374 if (opt_line_number) {
1375 static char indent[] = " ";
1376 unsigned long real_lineno = view->offset + lineno + 1;
1377 int col = 0;
1378
1379 if (real_lineno == 1 || (real_lineno % opt_num_interval) == 0)
1380 mvwprintw(view->win, lineno, 0, "%.*d", view->digits, real_lineno);
1381
1382 else if (view->digits < sizeof(indent))
1383 mvwaddnstr(view->win, lineno, 0, indent, view->digits);
1384
1385 waddstr(view->win, ": ");
1386
1387 while (line) {
1388 if (*line == '\t') {
1389 waddnstr(view->win, " ", 8 - (col % 8));
1390 col += 8 - (col % 8);
1391 line++;
1392
1393 } else {
1394 char *tab = strchr(line, '\t');
1395
1396 if (tab)
1397 waddnstr(view->win, line, tab - line);
1398 else
1399 waddstr(view->win, line);
1400 col += tab - line;
1401 line = tab;
1402 }
1403 }
1404 waddstr(view->win, line);
1405
1406 } else {
1407 #if 0
1408 /* NOTE: Code for only highlighting the text on the cursor line.
1409 * Kept since I've not yet decided whether to highlight the
1410 * entire line or not. --fonseca */
1411 /* No empty lines makes cursor drawing and clearing implicit. */
1412 if (!*line)
1413 line = " ", linelen = 1;
1414 #endif
1415 mvwaddnstr(view->win, lineno, 0, line, linelen);
1416 }
1417
1418 /* Paint the rest of the line if it's the cursor line. */
1419 if (type == LINE_CURSOR)
1420 wchgat(view->win, -1, 0, type, NULL);
1421
1422 return TRUE;
1423 }
1424
1425 static bool
1426 pager_read(struct view *view, char *line)
1427 {
1428 view->line[view->lines] = strdup(line);
1429 if (!view->line[view->lines])
1430 return FALSE;
1431
1432 view->lines++;
1433 return TRUE;
1434 }
1435
1436 static bool
1437 pager_enter(struct view *view)
1438 {
1439 char *line = view->line[view->lineno];
1440
1441 if (get_line_type(line) == LINE_COMMIT) {
1442 open_view(view, REQ_VIEW_DIFF, OPEN_DEFAULT);
1443 }
1444
1445 return TRUE;
1446 }
1447
1448 static struct view_ops pager_ops = {
1449 pager_draw,
1450 pager_read,
1451 pager_enter,
1452 };
1453
1454
1455 static bool
1456 main_draw(struct view *view, unsigned int lineno)
1457 {
1458 char buf[DATE_COLS + 1];
1459 struct commit *commit;
1460 enum line_type type;
1461 int cols = 0;
1462 size_t timelen;
1463
1464 if (view->offset + lineno >= view->lines)
1465 return FALSE;
1466
1467 commit = view->line[view->offset + lineno];
1468 if (!*commit->author)
1469 return FALSE;
1470
1471 if (view->offset + lineno == view->lineno) {
1472 string_copy(view->ref, commit->id);
1473 string_copy(ref_commit, view->ref);
1474 type = LINE_CURSOR;
1475 } else {
1476 type = LINE_MAIN_COMMIT;
1477 }
1478
1479 wmove(view->win, lineno, cols);
1480 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
1481
1482 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
1483 waddnstr(view->win, buf, timelen);
1484 waddstr(view->win, " ");
1485
1486 cols += DATE_COLS;
1487 wmove(view->win, lineno, cols);
1488 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
1489
1490 if (strlen(commit->author) > 19) {
1491 waddnstr(view->win, commit->author, 18);
1492 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
1493 waddch(view->win, '~');
1494 } else {
1495 waddstr(view->win, commit->author);
1496 }
1497
1498 cols += 20;
1499 wattrset(view->win, A_NORMAL);
1500 mvwaddch(view->win, lineno, cols, ACS_LTEE);
1501 wattrset(view->win, get_line_attr(type));
1502 mvwaddstr(view->win, lineno, cols + 2, commit->title);
1503 wattrset(view->win, A_NORMAL);
1504
1505 return TRUE;
1506 }
1507
1508 /* Reads git log --pretty=raw output and parses it into the commit struct. */
1509 static bool
1510 main_read(struct view *view, char *line)
1511 {
1512 enum line_type type = get_line_type(line);
1513 struct commit *commit;
1514
1515 switch (type) {
1516 case LINE_COMMIT:
1517 commit = calloc(1, sizeof(struct commit));
1518 if (!commit)
1519 return FALSE;
1520
1521 line += STRING_SIZE("commit ");
1522
1523 view->line[view->lines++] = commit;
1524 string_copy(commit->id, line);
1525 break;
1526
1527 case LINE_AUTHOR:
1528 {
1529 char *ident = line + STRING_SIZE("author ");
1530 char *end = strchr(ident, '<');
1531
1532 if (end) {
1533 for (; end > ident && isspace(end[-1]); end--) ;
1534 *end = 0;
1535 }
1536
1537 commit = view->line[view->lines - 1];
1538 string_copy(commit->author, ident);
1539
1540 /* Parse epoch and timezone */
1541 if (end) {
1542 char *secs = strchr(end + 1, '>');
1543 char *zone;
1544 time_t time;
1545
1546 if (!secs || secs[1] != ' ')
1547 break;
1548
1549 secs += 2;
1550 time = (time_t) atol(secs);
1551 zone = strchr(secs, ' ');
1552 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
1553 long tz;
1554
1555 zone++;
1556 tz = ('0' - zone[1]) * 60 * 60 * 10;
1557 tz += ('0' - zone[2]) * 60 * 60;
1558 tz += ('0' - zone[3]) * 60;
1559 tz += ('0' - zone[4]) * 60;
1560
1561 if (zone[0] == '-')
1562 tz = -tz;
1563
1564 time -= tz;
1565 }
1566 gmtime_r(&time, &commit->time);
1567 }
1568 break;
1569 }
1570 default:
1571 /* We should only ever end up here if there has already been a
1572 * commit line, however, be safe. */
1573 if (view->lines == 0)
1574 break;
1575
1576 /* Fill in the commit title if it has not already been set. */
1577 commit = view->line[view->lines - 1];
1578 if (commit->title[0])
1579 break;
1580
1581 /* Require titles to start with a non-space character at the
1582 * offset used by git log. */
1583 /* FIXME: More gracefull handling of titles; append "..." to
1584 * shortened titles, etc. */
1585 if (strncmp(line, " ", 4) ||
1586 isspace(line[4]))
1587 break;
1588
1589 string_copy(commit->title, line + 4);
1590 }
1591
1592 return TRUE;
1593 }
1594
1595 static bool
1596 main_enter(struct view *view)
1597 {
1598 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT | OPEN_BACKGROUNDED);
1599 return TRUE;
1600 }
1601
1602 static struct view_ops main_ops = {
1603 main_draw,
1604 main_read,
1605 main_enter,
1606 };
1607
1608 /*
1609 * Status management
1610 */
1611
1612 /* Whether or not the curses interface has been initialized. */
1613 bool cursed = FALSE;
1614
1615 /* The status window is used for polling keystrokes. */
1616 static WINDOW *status_win;
1617
1618 /* Update status and title window. */
1619 static void
1620 report(const char *msg, ...)
1621 {
1622 va_list args;
1623
1624 /* Update the title window first, so the cursor ends up in the status
1625 * window. */
1626 update_view_title(display[current_view]);
1627
1628 va_start(args, msg);
1629
1630 werase(status_win);
1631 wmove(status_win, 0, 0);
1632 if (*msg)
1633 vwprintw(status_win, msg, args);
1634 wrefresh(status_win);
1635
1636 va_end(args);
1637 }
1638
1639 /* Controls when nodelay should be in effect when polling user input. */
1640 static void
1641 set_nonblocking_input(bool loading)
1642 {
1643 /* The number of loading views. */
1644 static unsigned int nloading;
1645
1646 if ((loading == FALSE && nloading-- == 1) ||
1647 (loading == TRUE && nloading++ == 0))
1648 nodelay(status_win, loading);
1649 }
1650
1651 static void
1652 init_display(void)
1653 {
1654 int x, y;
1655
1656 /* Initialize the curses library */
1657 if (isatty(STDIN_FILENO)) {
1658 cursed = !!initscr();
1659 } else {
1660 /* Leave stdin and stdout alone when acting as a pager. */
1661 FILE *io = fopen("/dev/tty", "r+");
1662
1663 cursed = !!newterm(NULL, io, io);
1664 }
1665
1666 if (!cursed)
1667 die("Failed to initialize curses");
1668
1669 nonl(); /* Tell curses not to do NL->CR/NL on output */
1670 cbreak(); /* Take input chars one at a time, no wait for \n */
1671 noecho(); /* Don't echo input */
1672 leaveok(stdscr, TRUE);
1673
1674 if (has_colors())
1675 init_colors();
1676
1677 getmaxyx(stdscr, y, x);
1678 status_win = newwin(1, 0, y - 1, 0);
1679 if (!status_win)
1680 die("Failed to create status window");
1681
1682 /* Enable keyboard mapping */
1683 keypad(status_win, TRUE);
1684 wbkgdset(status_win, get_line_attr(LINE_STATUS));
1685 }
1686
1687 /*
1688 * Main
1689 */
1690
1691 static void
1692 quit(int sig)
1693 {
1694 /* XXX: Restore tty modes and let the OS cleanup the rest! */
1695 if (cursed)
1696 endwin();
1697 exit(0);
1698 }
1699
1700 static void die(const char *err, ...)
1701 {
1702 va_list args;
1703
1704 endwin();
1705
1706 va_start(args, err);
1707 fputs("tig: ", stderr);
1708 vfprintf(stderr, err, args);
1709 fputs("\n", stderr);
1710 va_end(args);
1711
1712 exit(1);
1713 }
1714
1715 int
1716 main(int argc, char *argv[])
1717 {
1718 struct view *view;
1719 enum request request;
1720 size_t i;
1721
1722 signal(SIGINT, quit);
1723
1724 if (!parse_options(argc, argv))
1725 return 0;
1726
1727 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1728 view->cmd_env = getenv(view->cmd_env);
1729
1730 request = opt_request;
1731
1732 init_display();
1733
1734 while (view_driver(display[current_view], request)) {
1735 int key;
1736 int i;
1737
1738 foreach_view (view, i)
1739 update_view(view);
1740
1741 /* Refresh, accept single keystroke of input */
1742 key = wgetch(status_win);
1743 request = get_request(key);
1744
1745 /* Some low-level request handling. This keeps handling of
1746 * status_win restricted. */
1747 switch (request) {
1748 case REQ_PROMPT:
1749 report(":");
1750 /* Temporarily switch to line-oriented and echoed
1751 * input. */
1752 nocbreak();
1753 echo();
1754
1755 if (wgetnstr(status_win, opt_cmd + 4, sizeof(opt_cmd) - 4) == OK) {
1756 memcpy(opt_cmd, "git ", 4);
1757 opt_request = REQ_VIEW_PAGER;
1758 } else {
1759 request = ERR;
1760 }
1761
1762 noecho();
1763 cbreak();
1764 break;
1765
1766 case REQ_SCREEN_RESIZE:
1767 {
1768 int height, width;
1769
1770 getmaxyx(stdscr, height, width);
1771
1772 /* Resize the status view and let the view driver take
1773 * care of resizing the displayed views. */
1774 wresize(status_win, 1, width);
1775 mvwin(status_win, height - 1, 0);
1776 wrefresh(status_win);
1777 break;
1778 }
1779 default:
1780 break;
1781 }
1782 }
1783
1784 quit(0);
1785
1786 return 0;
1787 }
1788
1789 /**
1790 * TODO
1791 * ----
1792 * Features that should be explored.
1793 *
1794 * - Searching.
1795 *
1796 * - Locale support.
1797 *
1798 * COPYRIGHT
1799 * ---------
1800 * Copyright (c) Jonas Fonseca <fonseca@diku.dk>, 2006
1801 *
1802 * This program is free software; you can redistribute it and/or modify
1803 * it under the terms of the GNU General Public License as published by
1804 * the Free Software Foundation; either version 2 of the License, or
1805 * (at your option) any later version.
1806 *
1807 * SEE ALSO
1808 * --------
1809 * [verse]
1810 * link:http://www.kernel.org/pub/software/scm/git/docs/[git(7)],
1811 * link:http://www.kernel.org/pub/software/scm/cogito/docs/[cogito(7)]
1812 * gitk(1): git repository browser written using tcl/tk,
1813 * gitview(1): git repository browser written using python/gtk.
1814 **/
Full-screen terminal Git browser.