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1 /* Copyright (c) 2006-2007 Jonas Fonseca <fonseca@diku.dk>
2 *
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.
7 *
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.
12 */
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
26 #include <assert.h>
27 #include <errno.h>
28 #include <ctype.h>
29 #include <signal.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <unistd.h>
37 #include <time.h>
39 #include <regex.h>
41 #include <locale.h>
42 #include <langinfo.h>
43 #include <iconv.h>
45 #include <curses.h>
47 #if __GNUC__ >= 3
48 #define __NORETURN __attribute__((__noreturn__))
49 #else
50 #define __NORETURN
51 #endif
53 static void __NORETURN die(const char *err, ...);
54 static void report(const char *msg, ...);
55 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, size_t, char *, size_t));
56 static void set_nonblocking_input(bool loading);
57 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
59 #define ABS(x) ((x) >= 0 ? (x) : -(x))
60 #define MIN(x, y) ((x) < (y) ? (x) : (y))
62 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
63 #define STRING_SIZE(x) (sizeof(x) - 1)
65 #define SIZEOF_STR 1024 /* Default string size. */
66 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
67 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
69 /* Revision graph */
71 #define REVGRAPH_INIT 'I'
72 #define REVGRAPH_MERGE 'M'
73 #define REVGRAPH_BRANCH '+'
74 #define REVGRAPH_COMMIT '*'
75 #define REVGRAPH_LINE '|'
77 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
79 /* This color name can be used to refer to the default term colors. */
80 #define COLOR_DEFAULT (-1)
82 #define ICONV_NONE ((iconv_t) -1)
83 #ifndef ICONV_CONST
84 #define ICONV_CONST /* nothing */
85 #endif
87 /* The format and size of the date column in the main view. */
88 #define DATE_FORMAT "%Y-%m-%d %H:%M"
89 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
91 #define AUTHOR_COLS 20
93 /* The default interval between line numbers. */
94 #define NUMBER_INTERVAL 1
96 #define TABSIZE 8
98 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
100 #ifndef GIT_CONFIG
101 #define GIT_CONFIG "git config"
102 #endif
104 #define TIG_LS_REMOTE \
105 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
107 #define TIG_DIFF_CMD \
108 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
110 #define TIG_LOG_CMD \
111 "git log --cc --stat -n100 %s 2>/dev/null"
113 #define TIG_MAIN_CMD \
114 "git log --topo-order --pretty=raw %s 2>/dev/null"
116 #define TIG_TREE_CMD \
117 "git ls-tree %s %s"
119 #define TIG_BLOB_CMD \
120 "git cat-file blob %s"
122 /* XXX: Needs to be defined to the empty string. */
123 #define TIG_HELP_CMD ""
124 #define TIG_PAGER_CMD ""
125 #define TIG_STATUS_CMD ""
126 #define TIG_STAGE_CMD ""
128 /* Some ascii-shorthands fitted into the ncurses namespace. */
129 #define KEY_TAB '\t'
130 #define KEY_RETURN '\r'
131 #define KEY_ESC 27
134 struct ref {
135 char *name; /* Ref name; tag or head names are shortened. */
136 char id[SIZEOF_REV]; /* Commit SHA1 ID */
137 unsigned int tag:1; /* Is it a tag? */
138 unsigned int remote:1; /* Is it a remote ref? */
139 unsigned int next:1; /* For ref lists: are there more refs? */
140 };
142 static struct ref **get_refs(char *id);
144 struct int_map {
145 const char *name;
146 int namelen;
147 int value;
148 };
150 static int
151 set_from_int_map(struct int_map *map, size_t map_size,
152 int *value, const char *name, int namelen)
153 {
155 int i;
157 for (i = 0; i < map_size; i++)
158 if (namelen == map[i].namelen &&
159 !strncasecmp(name, map[i].name, namelen)) {
160 *value = map[i].value;
161 return OK;
162 }
164 return ERR;
165 }
168 /*
169 * String helpers
170 */
172 static inline void
173 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
174 {
175 if (srclen > dstlen - 1)
176 srclen = dstlen - 1;
178 strncpy(dst, src, srclen);
179 dst[srclen] = 0;
180 }
182 /* Shorthands for safely copying into a fixed buffer. */
184 #define string_copy(dst, src) \
185 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
187 #define string_ncopy(dst, src, srclen) \
188 string_ncopy_do(dst, sizeof(dst), src, srclen)
190 #define string_copy_rev(dst, src) \
191 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
193 #define string_add(dst, from, src) \
194 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
196 static char *
197 chomp_string(char *name)
198 {
199 int namelen;
201 while (isspace(*name))
202 name++;
204 namelen = strlen(name) - 1;
205 while (namelen > 0 && isspace(name[namelen]))
206 name[namelen--] = 0;
208 return name;
209 }
211 static bool
212 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
213 {
214 va_list args;
215 size_t pos = bufpos ? *bufpos : 0;
217 va_start(args, fmt);
218 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
219 va_end(args);
221 if (bufpos)
222 *bufpos = pos;
224 return pos >= bufsize ? FALSE : TRUE;
225 }
227 #define string_format(buf, fmt, args...) \
228 string_nformat(buf, sizeof(buf), NULL, fmt, args)
230 #define string_format_from(buf, from, fmt, args...) \
231 string_nformat(buf, sizeof(buf), from, fmt, args)
233 static int
234 string_enum_compare(const char *str1, const char *str2, int len)
235 {
236 size_t i;
238 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
240 /* Diff-Header == DIFF_HEADER */
241 for (i = 0; i < len; i++) {
242 if (toupper(str1[i]) == toupper(str2[i]))
243 continue;
245 if (string_enum_sep(str1[i]) &&
246 string_enum_sep(str2[i]))
247 continue;
249 return str1[i] - str2[i];
250 }
252 return 0;
253 }
255 /* Shell quoting
256 *
257 * NOTE: The following is a slightly modified copy of the git project's shell
258 * quoting routines found in the quote.c file.
259 *
260 * Help to copy the thing properly quoted for the shell safety. any single
261 * quote is replaced with '\'', any exclamation point is replaced with '\!',
262 * and the whole thing is enclosed in a
263 *
264 * E.g.
265 * original sq_quote result
266 * name ==> name ==> 'name'
267 * a b ==> a b ==> 'a b'
268 * a'b ==> a'\''b ==> 'a'\''b'
269 * a!b ==> a'\!'b ==> 'a'\!'b'
270 */
272 static size_t
273 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
274 {
275 char c;
277 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
279 BUFPUT('\'');
280 while ((c = *src++)) {
281 if (c == '\'' || c == '!') {
282 BUFPUT('\'');
283 BUFPUT('\\');
284 BUFPUT(c);
285 BUFPUT('\'');
286 } else {
287 BUFPUT(c);
288 }
289 }
290 BUFPUT('\'');
292 if (bufsize < SIZEOF_STR)
293 buf[bufsize] = 0;
295 return bufsize;
296 }
299 /*
300 * User requests
301 */
303 #define REQ_INFO \
304 /* XXX: Keep the view request first and in sync with views[]. */ \
305 REQ_GROUP("View switching") \
306 REQ_(VIEW_MAIN, "Show main view"), \
307 REQ_(VIEW_DIFF, "Show diff view"), \
308 REQ_(VIEW_LOG, "Show log view"), \
309 REQ_(VIEW_TREE, "Show tree view"), \
310 REQ_(VIEW_BLOB, "Show blob view"), \
311 REQ_(VIEW_HELP, "Show help page"), \
312 REQ_(VIEW_PAGER, "Show pager view"), \
313 REQ_(VIEW_STATUS, "Show status view"), \
314 REQ_(VIEW_STAGE, "Show stage view"), \
315 \
316 REQ_GROUP("View manipulation") \
317 REQ_(ENTER, "Enter current line and scroll"), \
318 REQ_(NEXT, "Move to next"), \
319 REQ_(PREVIOUS, "Move to previous"), \
320 REQ_(VIEW_NEXT, "Move focus to next view"), \
321 REQ_(VIEW_CLOSE, "Close the current view"), \
322 REQ_(QUIT, "Close all views and quit"), \
323 \
324 REQ_GROUP("Cursor navigation") \
325 REQ_(MOVE_UP, "Move cursor one line up"), \
326 REQ_(MOVE_DOWN, "Move cursor one line down"), \
327 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
328 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
329 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
330 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
331 \
332 REQ_GROUP("Scrolling") \
333 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
334 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
335 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
336 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
337 \
338 REQ_GROUP("Searching") \
339 REQ_(SEARCH, "Search the view"), \
340 REQ_(SEARCH_BACK, "Search backwards in the view"), \
341 REQ_(FIND_NEXT, "Find next search match"), \
342 REQ_(FIND_PREV, "Find previous search match"), \
343 \
344 REQ_GROUP("Misc") \
345 REQ_(NONE, "Do nothing"), \
346 REQ_(PROMPT, "Bring up the prompt"), \
347 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
348 REQ_(SCREEN_RESIZE, "Resize the screen"), \
349 REQ_(SHOW_VERSION, "Show version information"), \
350 REQ_(STOP_LOADING, "Stop all loading views"), \
351 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
352 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
353 REQ_(STATUS_UPDATE, "Update file status"), \
354 REQ_(EDIT, "Open in editor"), \
355 REQ_(CHERRY_PICK, "Cherry-pick commit to current branch")
358 /* User action requests. */
359 enum request {
360 #define REQ_GROUP(help)
361 #define REQ_(req, help) REQ_##req
363 /* Offset all requests to avoid conflicts with ncurses getch values. */
364 REQ_OFFSET = KEY_MAX + 1,
365 REQ_INFO,
366 REQ_UNKNOWN,
368 #undef REQ_GROUP
369 #undef REQ_
370 };
372 struct request_info {
373 enum request request;
374 char *name;
375 int namelen;
376 char *help;
377 };
379 static struct request_info req_info[] = {
380 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
381 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
382 REQ_INFO
383 #undef REQ_GROUP
384 #undef REQ_
385 };
387 static enum request
388 get_request(const char *name)
389 {
390 int namelen = strlen(name);
391 int i;
393 for (i = 0; i < ARRAY_SIZE(req_info); i++)
394 if (req_info[i].namelen == namelen &&
395 !string_enum_compare(req_info[i].name, name, namelen))
396 return req_info[i].request;
398 return REQ_UNKNOWN;
399 }
402 /*
403 * Options
404 */
406 static const char usage[] =
407 "tig " TIG_VERSION " (" __DATE__ ")\n"
408 "\n"
409 "Usage: tig [options]\n"
410 " or: tig [options] [--] [git log options]\n"
411 " or: tig [options] log [git log options]\n"
412 " or: tig [options] diff [git diff options]\n"
413 " or: tig [options] show [git show options]\n"
414 " or: tig [options] < [git command output]\n"
415 "\n"
416 "Options:\n"
417 " -l Start up in log view\n"
418 " -d Start up in diff view\n"
419 " -S Start up in status view\n"
420 " -n[I], --line-number[=I] Show line numbers with given interval\n"
421 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
422 " -- Mark end of tig options\n"
423 " -v, --version Show version and exit\n"
424 " -h, --help Show help message and exit\n";
426 /* Option and state variables. */
427 static bool opt_line_number = FALSE;
428 static bool opt_rev_graph = FALSE;
429 static int opt_num_interval = NUMBER_INTERVAL;
430 static int opt_tab_size = TABSIZE;
431 static enum request opt_request = REQ_VIEW_MAIN;
432 static char opt_cmd[SIZEOF_STR] = "";
433 static char opt_path[SIZEOF_STR] = "";
434 static FILE *opt_pipe = NULL;
435 static char opt_encoding[20] = "UTF-8";
436 static bool opt_utf8 = TRUE;
437 static char opt_codeset[20] = "UTF-8";
438 static iconv_t opt_iconv = ICONV_NONE;
439 static char opt_search[SIZEOF_STR] = "";
440 static char opt_cdup[SIZEOF_STR] = "";
441 static char opt_git_dir[SIZEOF_STR] = "";
442 static char opt_editor[SIZEOF_STR] = "";
444 enum option_type {
445 OPT_NONE,
446 OPT_INT,
447 };
449 static bool
450 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
451 {
452 va_list args;
453 char *value = "";
454 int *number;
456 if (opt[0] != '-')
457 return FALSE;
459 if (opt[1] == '-') {
460 int namelen = strlen(name);
462 opt += 2;
464 if (strncmp(opt, name, namelen))
465 return FALSE;
467 if (opt[namelen] == '=')
468 value = opt + namelen + 1;
470 } else {
471 if (!short_name || opt[1] != short_name)
472 return FALSE;
473 value = opt + 2;
474 }
476 va_start(args, type);
477 if (type == OPT_INT) {
478 number = va_arg(args, int *);
479 if (isdigit(*value))
480 *number = atoi(value);
481 }
482 va_end(args);
484 return TRUE;
485 }
487 /* Returns the index of log or diff command or -1 to exit. */
488 static bool
489 parse_options(int argc, char *argv[])
490 {
491 int i;
493 for (i = 1; i < argc; i++) {
494 char *opt = argv[i];
496 if (!strcmp(opt, "log") ||
497 !strcmp(opt, "diff") ||
498 !strcmp(opt, "show")) {
499 opt_request = opt[0] == 'l'
500 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
501 break;
502 }
504 if (opt[0] && opt[0] != '-')
505 break;
507 if (!strcmp(opt, "-l")) {
508 opt_request = REQ_VIEW_LOG;
509 continue;
510 }
512 if (!strcmp(opt, "-d")) {
513 opt_request = REQ_VIEW_DIFF;
514 continue;
515 }
517 if (!strcmp(opt, "-S")) {
518 opt_request = REQ_VIEW_STATUS;
519 continue;
520 }
522 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
523 opt_line_number = TRUE;
524 continue;
525 }
527 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
528 opt_tab_size = MIN(opt_tab_size, TABSIZE);
529 continue;
530 }
532 if (check_option(opt, 'v', "version", OPT_NONE)) {
533 printf("tig version %s\n", TIG_VERSION);
534 return FALSE;
535 }
537 if (check_option(opt, 'h', "help", OPT_NONE)) {
538 printf(usage);
539 return FALSE;
540 }
542 if (!strcmp(opt, "--")) {
543 i++;
544 break;
545 }
547 die("unknown option '%s'\n\n%s", opt, usage);
548 }
550 if (!isatty(STDIN_FILENO)) {
551 opt_request = REQ_VIEW_PAGER;
552 opt_pipe = stdin;
554 } else if (i < argc) {
555 size_t buf_size;
557 if (opt_request == REQ_VIEW_MAIN)
558 /* XXX: This is vulnerable to the user overriding
559 * options required for the main view parser. */
560 string_copy(opt_cmd, "git log --pretty=raw");
561 else
562 string_copy(opt_cmd, "git");
563 buf_size = strlen(opt_cmd);
565 while (buf_size < sizeof(opt_cmd) && i < argc) {
566 opt_cmd[buf_size++] = ' ';
567 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
568 }
570 if (buf_size >= sizeof(opt_cmd))
571 die("command too long");
573 opt_cmd[buf_size] = 0;
574 }
576 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
577 opt_utf8 = FALSE;
579 return TRUE;
580 }
583 /*
584 * Line-oriented content detection.
585 */
587 #define LINE_INFO \
588 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
589 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
590 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
591 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
592 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
593 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
594 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
595 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
596 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
597 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
598 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
599 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
600 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
601 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
602 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
603 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
604 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
605 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
606 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
607 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
608 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
609 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
610 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
611 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
612 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
613 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
614 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
615 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
616 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
617 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
618 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
619 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
620 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
621 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
622 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
623 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
624 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
625 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
626 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
627 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
628 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
629 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
630 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
631 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
632 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
633 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
634 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0)
636 enum line_type {
637 #define LINE(type, line, fg, bg, attr) \
638 LINE_##type
639 LINE_INFO
640 #undef LINE
641 };
643 struct line_info {
644 const char *name; /* Option name. */
645 int namelen; /* Size of option name. */
646 const char *line; /* The start of line to match. */
647 int linelen; /* Size of string to match. */
648 int fg, bg, attr; /* Color and text attributes for the lines. */
649 };
651 static struct line_info line_info[] = {
652 #define LINE(type, line, fg, bg, attr) \
653 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
654 LINE_INFO
655 #undef LINE
656 };
658 static enum line_type
659 get_line_type(char *line)
660 {
661 int linelen = strlen(line);
662 enum line_type type;
664 for (type = 0; type < ARRAY_SIZE(line_info); type++)
665 /* Case insensitive search matches Signed-off-by lines better. */
666 if (linelen >= line_info[type].linelen &&
667 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
668 return type;
670 return LINE_DEFAULT;
671 }
673 static inline int
674 get_line_attr(enum line_type type)
675 {
676 assert(type < ARRAY_SIZE(line_info));
677 return COLOR_PAIR(type) | line_info[type].attr;
678 }
680 static struct line_info *
681 get_line_info(char *name, int namelen)
682 {
683 enum line_type type;
685 for (type = 0; type < ARRAY_SIZE(line_info); type++)
686 if (namelen == line_info[type].namelen &&
687 !string_enum_compare(line_info[type].name, name, namelen))
688 return &line_info[type];
690 return NULL;
691 }
693 static void
694 init_colors(void)
695 {
696 int default_bg = COLOR_BLACK;
697 int default_fg = COLOR_WHITE;
698 enum line_type type;
700 start_color();
702 if (use_default_colors() != ERR) {
703 default_bg = -1;
704 default_fg = -1;
705 }
707 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
708 struct line_info *info = &line_info[type];
709 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
710 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
712 init_pair(type, fg, bg);
713 }
714 }
716 struct line {
717 enum line_type type;
719 /* State flags */
720 unsigned int selected:1;
722 void *data; /* User data */
723 };
726 /*
727 * Keys
728 */
730 struct keybinding {
731 int alias;
732 enum request request;
733 struct keybinding *next;
734 };
736 static struct keybinding default_keybindings[] = {
737 /* View switching */
738 { 'm', REQ_VIEW_MAIN },
739 { 'd', REQ_VIEW_DIFF },
740 { 'l', REQ_VIEW_LOG },
741 { 't', REQ_VIEW_TREE },
742 { 'f', REQ_VIEW_BLOB },
743 { 'p', REQ_VIEW_PAGER },
744 { 'h', REQ_VIEW_HELP },
745 { 'S', REQ_VIEW_STATUS },
746 { 'c', REQ_VIEW_STAGE },
748 /* View manipulation */
749 { 'q', REQ_VIEW_CLOSE },
750 { KEY_TAB, REQ_VIEW_NEXT },
751 { KEY_RETURN, REQ_ENTER },
752 { KEY_UP, REQ_PREVIOUS },
753 { KEY_DOWN, REQ_NEXT },
755 /* Cursor navigation */
756 { 'k', REQ_MOVE_UP },
757 { 'j', REQ_MOVE_DOWN },
758 { KEY_HOME, REQ_MOVE_FIRST_LINE },
759 { KEY_END, REQ_MOVE_LAST_LINE },
760 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
761 { ' ', REQ_MOVE_PAGE_DOWN },
762 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
763 { 'b', REQ_MOVE_PAGE_UP },
764 { '-', REQ_MOVE_PAGE_UP },
766 /* Scrolling */
767 { KEY_IC, REQ_SCROLL_LINE_UP },
768 { KEY_DC, REQ_SCROLL_LINE_DOWN },
769 { 'w', REQ_SCROLL_PAGE_UP },
770 { 's', REQ_SCROLL_PAGE_DOWN },
772 /* Searching */
773 { '/', REQ_SEARCH },
774 { '?', REQ_SEARCH_BACK },
775 { 'n', REQ_FIND_NEXT },
776 { 'N', REQ_FIND_PREV },
778 /* Misc */
779 { 'Q', REQ_QUIT },
780 { 'z', REQ_STOP_LOADING },
781 { 'v', REQ_SHOW_VERSION },
782 { 'r', REQ_SCREEN_REDRAW },
783 { '.', REQ_TOGGLE_LINENO },
784 { 'g', REQ_TOGGLE_REV_GRAPH },
785 { ':', REQ_PROMPT },
786 { 'u', REQ_STATUS_UPDATE },
787 { 'e', REQ_EDIT },
788 { 'C', REQ_CHERRY_PICK },
790 /* Using the ncurses SIGWINCH handler. */
791 { KEY_RESIZE, REQ_SCREEN_RESIZE },
792 };
794 #define KEYMAP_INFO \
795 KEYMAP_(GENERIC), \
796 KEYMAP_(MAIN), \
797 KEYMAP_(DIFF), \
798 KEYMAP_(LOG), \
799 KEYMAP_(TREE), \
800 KEYMAP_(BLOB), \
801 KEYMAP_(PAGER), \
802 KEYMAP_(HELP), \
803 KEYMAP_(STATUS), \
804 KEYMAP_(STAGE)
806 enum keymap {
807 #define KEYMAP_(name) KEYMAP_##name
808 KEYMAP_INFO
809 #undef KEYMAP_
810 };
812 static struct int_map keymap_table[] = {
813 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
814 KEYMAP_INFO
815 #undef KEYMAP_
816 };
818 #define set_keymap(map, name) \
819 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
821 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
823 static void
824 add_keybinding(enum keymap keymap, enum request request, int key)
825 {
826 struct keybinding *keybinding;
828 keybinding = calloc(1, sizeof(*keybinding));
829 if (!keybinding)
830 die("Failed to allocate keybinding");
832 keybinding->alias = key;
833 keybinding->request = request;
834 keybinding->next = keybindings[keymap];
835 keybindings[keymap] = keybinding;
836 }
838 /* Looks for a key binding first in the given map, then in the generic map, and
839 * lastly in the default keybindings. */
840 static enum request
841 get_keybinding(enum keymap keymap, int key)
842 {
843 struct keybinding *kbd;
844 int i;
846 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
847 if (kbd->alias == key)
848 return kbd->request;
850 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
851 if (kbd->alias == key)
852 return kbd->request;
854 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
855 if (default_keybindings[i].alias == key)
856 return default_keybindings[i].request;
858 return (enum request) key;
859 }
862 struct key {
863 char *name;
864 int value;
865 };
867 static struct key key_table[] = {
868 { "Enter", KEY_RETURN },
869 { "Space", ' ' },
870 { "Backspace", KEY_BACKSPACE },
871 { "Tab", KEY_TAB },
872 { "Escape", KEY_ESC },
873 { "Left", KEY_LEFT },
874 { "Right", KEY_RIGHT },
875 { "Up", KEY_UP },
876 { "Down", KEY_DOWN },
877 { "Insert", KEY_IC },
878 { "Delete", KEY_DC },
879 { "Hash", '#' },
880 { "Home", KEY_HOME },
881 { "End", KEY_END },
882 { "PageUp", KEY_PPAGE },
883 { "PageDown", KEY_NPAGE },
884 { "F1", KEY_F(1) },
885 { "F2", KEY_F(2) },
886 { "F3", KEY_F(3) },
887 { "F4", KEY_F(4) },
888 { "F5", KEY_F(5) },
889 { "F6", KEY_F(6) },
890 { "F7", KEY_F(7) },
891 { "F8", KEY_F(8) },
892 { "F9", KEY_F(9) },
893 { "F10", KEY_F(10) },
894 { "F11", KEY_F(11) },
895 { "F12", KEY_F(12) },
896 };
898 static int
899 get_key_value(const char *name)
900 {
901 int i;
903 for (i = 0; i < ARRAY_SIZE(key_table); i++)
904 if (!strcasecmp(key_table[i].name, name))
905 return key_table[i].value;
907 if (strlen(name) == 1 && isprint(*name))
908 return (int) *name;
910 return ERR;
911 }
913 static char *
914 get_key(enum request request)
915 {
916 static char buf[BUFSIZ];
917 static char key_char[] = "'X'";
918 size_t pos = 0;
919 char *sep = "";
920 int i;
922 buf[pos] = 0;
924 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
925 struct keybinding *keybinding = &default_keybindings[i];
926 char *seq = NULL;
927 int key;
929 if (keybinding->request != request)
930 continue;
932 for (key = 0; key < ARRAY_SIZE(key_table); key++)
933 if (key_table[key].value == keybinding->alias)
934 seq = key_table[key].name;
936 if (seq == NULL &&
937 keybinding->alias < 127 &&
938 isprint(keybinding->alias)) {
939 key_char[1] = (char) keybinding->alias;
940 seq = key_char;
941 }
943 if (!seq)
944 seq = "'?'";
946 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
947 return "Too many keybindings!";
948 sep = ", ";
949 }
951 return buf;
952 }
955 /*
956 * User config file handling.
957 */
959 static struct int_map color_map[] = {
960 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
961 COLOR_MAP(DEFAULT),
962 COLOR_MAP(BLACK),
963 COLOR_MAP(BLUE),
964 COLOR_MAP(CYAN),
965 COLOR_MAP(GREEN),
966 COLOR_MAP(MAGENTA),
967 COLOR_MAP(RED),
968 COLOR_MAP(WHITE),
969 COLOR_MAP(YELLOW),
970 };
972 #define set_color(color, name) \
973 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
975 static struct int_map attr_map[] = {
976 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
977 ATTR_MAP(NORMAL),
978 ATTR_MAP(BLINK),
979 ATTR_MAP(BOLD),
980 ATTR_MAP(DIM),
981 ATTR_MAP(REVERSE),
982 ATTR_MAP(STANDOUT),
983 ATTR_MAP(UNDERLINE),
984 };
986 #define set_attribute(attr, name) \
987 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
989 static int config_lineno;
990 static bool config_errors;
991 static char *config_msg;
993 /* Wants: object fgcolor bgcolor [attr] */
994 static int
995 option_color_command(int argc, char *argv[])
996 {
997 struct line_info *info;
999 if (argc != 3 && argc != 4) {
1000 config_msg = "Wrong number of arguments given to color command";
1001 return ERR;
1002 }
1004 info = get_line_info(argv[0], strlen(argv[0]));
1005 if (!info) {
1006 config_msg = "Unknown color name";
1007 return ERR;
1008 }
1010 if (set_color(&info->fg, argv[1]) == ERR ||
1011 set_color(&info->bg, argv[2]) == ERR) {
1012 config_msg = "Unknown color";
1013 return ERR;
1014 }
1016 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1017 config_msg = "Unknown attribute";
1018 return ERR;
1019 }
1021 return OK;
1022 }
1024 /* Wants: name = value */
1025 static int
1026 option_set_command(int argc, char *argv[])
1027 {
1028 if (argc != 3) {
1029 config_msg = "Wrong number of arguments given to set command";
1030 return ERR;
1031 }
1033 if (strcmp(argv[1], "=")) {
1034 config_msg = "No value assigned";
1035 return ERR;
1036 }
1038 if (!strcmp(argv[0], "show-rev-graph")) {
1039 opt_rev_graph = (!strcmp(argv[2], "1") ||
1040 !strcmp(argv[2], "true") ||
1041 !strcmp(argv[2], "yes"));
1042 return OK;
1043 }
1045 if (!strcmp(argv[0], "line-number-interval")) {
1046 opt_num_interval = atoi(argv[2]);
1047 return OK;
1048 }
1050 if (!strcmp(argv[0], "tab-size")) {
1051 opt_tab_size = atoi(argv[2]);
1052 return OK;
1053 }
1055 if (!strcmp(argv[0], "commit-encoding")) {
1056 char *arg = argv[2];
1057 int delimiter = *arg;
1058 int i;
1060 switch (delimiter) {
1061 case '"':
1062 case '\'':
1063 for (arg++, i = 0; arg[i]; i++)
1064 if (arg[i] == delimiter) {
1065 arg[i] = 0;
1066 break;
1067 }
1068 default:
1069 string_ncopy(opt_encoding, arg, strlen(arg));
1070 return OK;
1071 }
1072 }
1074 config_msg = "Unknown variable name";
1075 return ERR;
1076 }
1078 /* Wants: mode request key */
1079 static int
1080 option_bind_command(int argc, char *argv[])
1081 {
1082 enum request request;
1083 int keymap;
1084 int key;
1086 if (argc != 3) {
1087 config_msg = "Wrong number of arguments given to bind command";
1088 return ERR;
1089 }
1091 if (set_keymap(&keymap, argv[0]) == ERR) {
1092 config_msg = "Unknown key map";
1093 return ERR;
1094 }
1096 key = get_key_value(argv[1]);
1097 if (key == ERR) {
1098 config_msg = "Unknown key";
1099 return ERR;
1100 }
1102 request = get_request(argv[2]);
1103 if (request == REQ_UNKNOWN) {
1104 config_msg = "Unknown request name";
1105 return ERR;
1106 }
1108 add_keybinding(keymap, request, key);
1110 return OK;
1111 }
1113 static int
1114 set_option(char *opt, char *value)
1115 {
1116 char *argv[16];
1117 int valuelen;
1118 int argc = 0;
1120 /* Tokenize */
1121 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1122 argv[argc++] = value;
1124 value += valuelen;
1125 if (!*value)
1126 break;
1128 *value++ = 0;
1129 while (isspace(*value))
1130 value++;
1131 }
1133 if (!strcmp(opt, "color"))
1134 return option_color_command(argc, argv);
1136 if (!strcmp(opt, "set"))
1137 return option_set_command(argc, argv);
1139 if (!strcmp(opt, "bind"))
1140 return option_bind_command(argc, argv);
1142 config_msg = "Unknown option command";
1143 return ERR;
1144 }
1146 static int
1147 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1148 {
1149 int status = OK;
1151 config_lineno++;
1152 config_msg = "Internal error";
1154 /* Check for comment markers, since read_properties() will
1155 * only ensure opt and value are split at first " \t". */
1156 optlen = strcspn(opt, "#");
1157 if (optlen == 0)
1158 return OK;
1160 if (opt[optlen] != 0) {
1161 config_msg = "No option value";
1162 status = ERR;
1164 } else {
1165 /* Look for comment endings in the value. */
1166 size_t len = strcspn(value, "#");
1168 if (len < valuelen) {
1169 valuelen = len;
1170 value[valuelen] = 0;
1171 }
1173 status = set_option(opt, value);
1174 }
1176 if (status == ERR) {
1177 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1178 config_lineno, (int) optlen, opt, config_msg);
1179 config_errors = TRUE;
1180 }
1182 /* Always keep going if errors are encountered. */
1183 return OK;
1184 }
1186 static int
1187 load_options(void)
1188 {
1189 char *home = getenv("HOME");
1190 char buf[SIZEOF_STR];
1191 FILE *file;
1193 config_lineno = 0;
1194 config_errors = FALSE;
1196 if (!home || !string_format(buf, "%s/.tigrc", home))
1197 return ERR;
1199 /* It's ok that the file doesn't exist. */
1200 file = fopen(buf, "r");
1201 if (!file)
1202 return OK;
1204 if (read_properties(file, " \t", read_option) == ERR ||
1205 config_errors == TRUE)
1206 fprintf(stderr, "Errors while loading %s.\n", buf);
1208 return OK;
1209 }
1212 /*
1213 * The viewer
1214 */
1216 struct view;
1217 struct view_ops;
1219 /* The display array of active views and the index of the current view. */
1220 static struct view *display[2];
1221 static unsigned int current_view;
1223 /* Reading from the prompt? */
1224 static bool input_mode = FALSE;
1226 #define foreach_displayed_view(view, i) \
1227 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1229 #define displayed_views() (display[1] != NULL ? 2 : 1)
1231 /* Current head and commit ID */
1232 static char ref_blob[SIZEOF_REF] = "";
1233 static char ref_commit[SIZEOF_REF] = "HEAD";
1234 static char ref_head[SIZEOF_REF] = "HEAD";
1236 struct view {
1237 const char *name; /* View name */
1238 const char *cmd_fmt; /* Default command line format */
1239 const char *cmd_env; /* Command line set via environment */
1240 const char *id; /* Points to either of ref_{head,commit,blob} */
1242 struct view_ops *ops; /* View operations */
1244 enum keymap keymap; /* What keymap does this view have */
1246 char cmd[SIZEOF_STR]; /* Command buffer */
1247 char ref[SIZEOF_REF]; /* Hovered commit reference */
1248 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1250 int height, width; /* The width and height of the main window */
1251 WINDOW *win; /* The main window */
1252 WINDOW *title; /* The title window living below the main window */
1254 /* Navigation */
1255 unsigned long offset; /* Offset of the window top */
1256 unsigned long lineno; /* Current line number */
1258 /* Searching */
1259 char grep[SIZEOF_STR]; /* Search string */
1260 regex_t *regex; /* Pre-compiled regex */
1262 /* If non-NULL, points to the view that opened this view. If this view
1263 * is closed tig will switch back to the parent view. */
1264 struct view *parent;
1266 /* Buffering */
1267 unsigned long lines; /* Total number of lines */
1268 struct line *line; /* Line index */
1269 unsigned long line_size;/* Total number of allocated lines */
1270 unsigned int digits; /* Number of digits in the lines member. */
1272 /* Loading */
1273 FILE *pipe;
1274 time_t start_time;
1275 };
1277 struct view_ops {
1278 /* What type of content being displayed. Used in the title bar. */
1279 const char *type;
1280 /* Open and reads in all view content. */
1281 bool (*open)(struct view *view);
1282 /* Read one line; updates view->line. */
1283 bool (*read)(struct view *view, char *data);
1284 /* Draw one line; @lineno must be < view->height. */
1285 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1286 /* Depending on view handle a special requests. */
1287 enum request (*request)(struct view *view, enum request request, struct line *line);
1288 /* Search for regex in a line. */
1289 bool (*grep)(struct view *view, struct line *line);
1290 /* Select line */
1291 void (*select)(struct view *view, struct line *line);
1292 };
1294 static struct view_ops pager_ops;
1295 static struct view_ops main_ops;
1296 static struct view_ops tree_ops;
1297 static struct view_ops blob_ops;
1298 static struct view_ops help_ops;
1299 static struct view_ops status_ops;
1300 static struct view_ops stage_ops;
1302 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1303 { name, cmd, #env, ref, ops, map}
1305 #define VIEW_(id, name, ops, ref) \
1306 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1309 static struct view views[] = {
1310 VIEW_(MAIN, "main", &main_ops, ref_head),
1311 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1312 VIEW_(LOG, "log", &pager_ops, ref_head),
1313 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1314 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1315 VIEW_(HELP, "help", &help_ops, ""),
1316 VIEW_(PAGER, "pager", &pager_ops, "stdin"),
1317 VIEW_(STATUS, "status", &status_ops, ""),
1318 VIEW_(STAGE, "stage", &stage_ops, ""),
1319 };
1321 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1323 #define foreach_view(view, i) \
1324 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1326 #define view_is_displayed(view) \
1327 (view == display[0] || view == display[1])
1329 static bool
1330 draw_view_line(struct view *view, unsigned int lineno)
1331 {
1332 struct line *line;
1333 bool selected = (view->offset + lineno == view->lineno);
1334 bool draw_ok;
1336 assert(view_is_displayed(view));
1338 if (view->offset + lineno >= view->lines)
1339 return FALSE;
1341 line = &view->line[view->offset + lineno];
1343 if (selected) {
1344 line->selected = TRUE;
1345 view->ops->select(view, line);
1346 } else if (line->selected) {
1347 line->selected = FALSE;
1348 wmove(view->win, lineno, 0);
1349 wclrtoeol(view->win);
1350 }
1352 scrollok(view->win, FALSE);
1353 draw_ok = view->ops->draw(view, line, lineno, selected);
1354 scrollok(view->win, TRUE);
1356 return draw_ok;
1357 }
1359 static void
1360 redraw_view_from(struct view *view, int lineno)
1361 {
1362 assert(0 <= lineno && lineno < view->height);
1364 for (; lineno < view->height; lineno++) {
1365 if (!draw_view_line(view, lineno))
1366 break;
1367 }
1369 redrawwin(view->win);
1370 if (input_mode)
1371 wnoutrefresh(view->win);
1372 else
1373 wrefresh(view->win);
1374 }
1376 static void
1377 redraw_view(struct view *view)
1378 {
1379 wclear(view->win);
1380 redraw_view_from(view, 0);
1381 }
1384 static void
1385 update_view_title(struct view *view)
1386 {
1387 char buf[SIZEOF_STR];
1388 char state[SIZEOF_STR];
1389 size_t bufpos = 0, statelen = 0;
1391 assert(view_is_displayed(view));
1393 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1394 unsigned int view_lines = view->offset + view->height;
1395 unsigned int lines = view->lines
1396 ? MIN(view_lines, view->lines) * 100 / view->lines
1397 : 0;
1399 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1400 view->ops->type,
1401 view->lineno + 1,
1402 view->lines,
1403 lines);
1405 if (view->pipe) {
1406 time_t secs = time(NULL) - view->start_time;
1408 /* Three git seconds are a long time ... */
1409 if (secs > 2)
1410 string_format_from(state, &statelen, " %lds", secs);
1411 }
1412 }
1414 string_format_from(buf, &bufpos, "[%s]", view->name);
1415 if (*view->ref && bufpos < view->width) {
1416 size_t refsize = strlen(view->ref);
1417 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1419 if (minsize < view->width)
1420 refsize = view->width - minsize + 7;
1421 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1422 }
1424 if (statelen && bufpos < view->width) {
1425 string_format_from(buf, &bufpos, " %s", state);
1426 }
1428 if (view == display[current_view])
1429 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1430 else
1431 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1433 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1434 wclrtoeol(view->title);
1435 wmove(view->title, 0, view->width - 1);
1437 if (input_mode)
1438 wnoutrefresh(view->title);
1439 else
1440 wrefresh(view->title);
1441 }
1443 static void
1444 resize_display(void)
1445 {
1446 int offset, i;
1447 struct view *base = display[0];
1448 struct view *view = display[1] ? display[1] : display[0];
1450 /* Setup window dimensions */
1452 getmaxyx(stdscr, base->height, base->width);
1454 /* Make room for the status window. */
1455 base->height -= 1;
1457 if (view != base) {
1458 /* Horizontal split. */
1459 view->width = base->width;
1460 view->height = SCALE_SPLIT_VIEW(base->height);
1461 base->height -= view->height;
1463 /* Make room for the title bar. */
1464 view->height -= 1;
1465 }
1467 /* Make room for the title bar. */
1468 base->height -= 1;
1470 offset = 0;
1472 foreach_displayed_view (view, i) {
1473 if (!view->win) {
1474 view->win = newwin(view->height, 0, offset, 0);
1475 if (!view->win)
1476 die("Failed to create %s view", view->name);
1478 scrollok(view->win, TRUE);
1480 view->title = newwin(1, 0, offset + view->height, 0);
1481 if (!view->title)
1482 die("Failed to create title window");
1484 } else {
1485 wresize(view->win, view->height, view->width);
1486 mvwin(view->win, offset, 0);
1487 mvwin(view->title, offset + view->height, 0);
1488 }
1490 offset += view->height + 1;
1491 }
1492 }
1494 static void
1495 redraw_display(void)
1496 {
1497 struct view *view;
1498 int i;
1500 foreach_displayed_view (view, i) {
1501 redraw_view(view);
1502 update_view_title(view);
1503 }
1504 }
1506 static void
1507 update_display_cursor(struct view *view)
1508 {
1509 /* Move the cursor to the right-most column of the cursor line.
1510 *
1511 * XXX: This could turn out to be a bit expensive, but it ensures that
1512 * the cursor does not jump around. */
1513 if (view->lines) {
1514 wmove(view->win, view->lineno - view->offset, view->width - 1);
1515 wrefresh(view->win);
1516 }
1517 }
1519 /*
1520 * Navigation
1521 */
1523 /* Scrolling backend */
1524 static void
1525 do_scroll_view(struct view *view, int lines)
1526 {
1527 bool redraw_current_line = FALSE;
1529 /* The rendering expects the new offset. */
1530 view->offset += lines;
1532 assert(0 <= view->offset && view->offset < view->lines);
1533 assert(lines);
1535 /* Move current line into the view. */
1536 if (view->lineno < view->offset) {
1537 view->lineno = view->offset;
1538 redraw_current_line = TRUE;
1539 } else if (view->lineno >= view->offset + view->height) {
1540 view->lineno = view->offset + view->height - 1;
1541 redraw_current_line = TRUE;
1542 }
1544 assert(view->offset <= view->lineno && view->lineno < view->lines);
1546 /* Redraw the whole screen if scrolling is pointless. */
1547 if (view->height < ABS(lines)) {
1548 redraw_view(view);
1550 } else {
1551 int line = lines > 0 ? view->height - lines : 0;
1552 int end = line + ABS(lines);
1554 wscrl(view->win, lines);
1556 for (; line < end; line++) {
1557 if (!draw_view_line(view, line))
1558 break;
1559 }
1561 if (redraw_current_line)
1562 draw_view_line(view, view->lineno - view->offset);
1563 }
1565 redrawwin(view->win);
1566 wrefresh(view->win);
1567 report("");
1568 }
1570 /* Scroll frontend */
1571 static void
1572 scroll_view(struct view *view, enum request request)
1573 {
1574 int lines = 1;
1576 assert(view_is_displayed(view));
1578 switch (request) {
1579 case REQ_SCROLL_PAGE_DOWN:
1580 lines = view->height;
1581 case REQ_SCROLL_LINE_DOWN:
1582 if (view->offset + lines > view->lines)
1583 lines = view->lines - view->offset;
1585 if (lines == 0 || view->offset + view->height >= view->lines) {
1586 report("Cannot scroll beyond the last line");
1587 return;
1588 }
1589 break;
1591 case REQ_SCROLL_PAGE_UP:
1592 lines = view->height;
1593 case REQ_SCROLL_LINE_UP:
1594 if (lines > view->offset)
1595 lines = view->offset;
1597 if (lines == 0) {
1598 report("Cannot scroll beyond the first line");
1599 return;
1600 }
1602 lines = -lines;
1603 break;
1605 default:
1606 die("request %d not handled in switch", request);
1607 }
1609 do_scroll_view(view, lines);
1610 }
1612 /* Cursor moving */
1613 static void
1614 move_view(struct view *view, enum request request)
1615 {
1616 int scroll_steps = 0;
1617 int steps;
1619 switch (request) {
1620 case REQ_MOVE_FIRST_LINE:
1621 steps = -view->lineno;
1622 break;
1624 case REQ_MOVE_LAST_LINE:
1625 steps = view->lines - view->lineno - 1;
1626 break;
1628 case REQ_MOVE_PAGE_UP:
1629 steps = view->height > view->lineno
1630 ? -view->lineno : -view->height;
1631 break;
1633 case REQ_MOVE_PAGE_DOWN:
1634 steps = view->lineno + view->height >= view->lines
1635 ? view->lines - view->lineno - 1 : view->height;
1636 break;
1638 case REQ_MOVE_UP:
1639 steps = -1;
1640 break;
1642 case REQ_MOVE_DOWN:
1643 steps = 1;
1644 break;
1646 default:
1647 die("request %d not handled in switch", request);
1648 }
1650 if (steps <= 0 && view->lineno == 0) {
1651 report("Cannot move beyond the first line");
1652 return;
1654 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1655 report("Cannot move beyond the last line");
1656 return;
1657 }
1659 /* Move the current line */
1660 view->lineno += steps;
1661 assert(0 <= view->lineno && view->lineno < view->lines);
1663 /* Check whether the view needs to be scrolled */
1664 if (view->lineno < view->offset ||
1665 view->lineno >= view->offset + view->height) {
1666 scroll_steps = steps;
1667 if (steps < 0 && -steps > view->offset) {
1668 scroll_steps = -view->offset;
1670 } else if (steps > 0) {
1671 if (view->lineno == view->lines - 1 &&
1672 view->lines > view->height) {
1673 scroll_steps = view->lines - view->offset - 1;
1674 if (scroll_steps >= view->height)
1675 scroll_steps -= view->height - 1;
1676 }
1677 }
1678 }
1680 if (!view_is_displayed(view)) {
1681 view->offset += scroll_steps;
1682 assert(0 <= view->offset && view->offset < view->lines);
1683 view->ops->select(view, &view->line[view->lineno]);
1684 return;
1685 }
1687 /* Repaint the old "current" line if we be scrolling */
1688 if (ABS(steps) < view->height)
1689 draw_view_line(view, view->lineno - steps - view->offset);
1691 if (scroll_steps) {
1692 do_scroll_view(view, scroll_steps);
1693 return;
1694 }
1696 /* Draw the current line */
1697 draw_view_line(view, view->lineno - view->offset);
1699 redrawwin(view->win);
1700 wrefresh(view->win);
1701 report("");
1702 }
1705 /*
1706 * Searching
1707 */
1709 static void search_view(struct view *view, enum request request);
1711 static bool
1712 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1713 {
1714 assert(view_is_displayed(view));
1716 if (!view->ops->grep(view, line))
1717 return FALSE;
1719 if (lineno - view->offset >= view->height) {
1720 view->offset = lineno;
1721 view->lineno = lineno;
1722 redraw_view(view);
1724 } else {
1725 unsigned long old_lineno = view->lineno - view->offset;
1727 view->lineno = lineno;
1728 draw_view_line(view, old_lineno);
1730 draw_view_line(view, view->lineno - view->offset);
1731 redrawwin(view->win);
1732 wrefresh(view->win);
1733 }
1735 report("Line %ld matches '%s'", lineno + 1, view->grep);
1736 return TRUE;
1737 }
1739 static void
1740 find_next(struct view *view, enum request request)
1741 {
1742 unsigned long lineno = view->lineno;
1743 int direction;
1745 if (!*view->grep) {
1746 if (!*opt_search)
1747 report("No previous search");
1748 else
1749 search_view(view, request);
1750 return;
1751 }
1753 switch (request) {
1754 case REQ_SEARCH:
1755 case REQ_FIND_NEXT:
1756 direction = 1;
1757 break;
1759 case REQ_SEARCH_BACK:
1760 case REQ_FIND_PREV:
1761 direction = -1;
1762 break;
1764 default:
1765 return;
1766 }
1768 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1769 lineno += direction;
1771 /* Note, lineno is unsigned long so will wrap around in which case it
1772 * will become bigger than view->lines. */
1773 for (; lineno < view->lines; lineno += direction) {
1774 struct line *line = &view->line[lineno];
1776 if (find_next_line(view, lineno, line))
1777 return;
1778 }
1780 report("No match found for '%s'", view->grep);
1781 }
1783 static void
1784 search_view(struct view *view, enum request request)
1785 {
1786 int regex_err;
1788 if (view->regex) {
1789 regfree(view->regex);
1790 *view->grep = 0;
1791 } else {
1792 view->regex = calloc(1, sizeof(*view->regex));
1793 if (!view->regex)
1794 return;
1795 }
1797 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1798 if (regex_err != 0) {
1799 char buf[SIZEOF_STR] = "unknown error";
1801 regerror(regex_err, view->regex, buf, sizeof(buf));
1802 report("Search failed: %s", buf);
1803 return;
1804 }
1806 string_copy(view->grep, opt_search);
1808 find_next(view, request);
1809 }
1811 /*
1812 * Incremental updating
1813 */
1815 static void
1816 end_update(struct view *view)
1817 {
1818 if (!view->pipe)
1819 return;
1820 set_nonblocking_input(FALSE);
1821 if (view->pipe == stdin)
1822 fclose(view->pipe);
1823 else
1824 pclose(view->pipe);
1825 view->pipe = NULL;
1826 }
1828 static bool
1829 begin_update(struct view *view)
1830 {
1831 if (view->pipe)
1832 end_update(view);
1834 if (opt_cmd[0]) {
1835 string_copy(view->cmd, opt_cmd);
1836 opt_cmd[0] = 0;
1837 /* When running random commands, initially show the
1838 * command in the title. However, it maybe later be
1839 * overwritten if a commit line is selected. */
1840 if (view == VIEW(REQ_VIEW_PAGER))
1841 string_copy(view->ref, view->cmd);
1842 else
1843 view->ref[0] = 0;
1845 } else if (view == VIEW(REQ_VIEW_TREE)) {
1846 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1847 char path[SIZEOF_STR];
1849 if (strcmp(view->vid, view->id))
1850 opt_path[0] = path[0] = 0;
1851 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
1852 return FALSE;
1854 if (!string_format(view->cmd, format, view->id, path))
1855 return FALSE;
1857 } else {
1858 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1859 const char *id = view->id;
1861 if (!string_format(view->cmd, format, id, id, id, id, id))
1862 return FALSE;
1864 /* Put the current ref_* value to the view title ref
1865 * member. This is needed by the blob view. Most other
1866 * views sets it automatically after loading because the
1867 * first line is a commit line. */
1868 string_copy_rev(view->ref, view->id);
1869 }
1871 /* Special case for the pager view. */
1872 if (opt_pipe) {
1873 view->pipe = opt_pipe;
1874 opt_pipe = NULL;
1875 } else {
1876 view->pipe = popen(view->cmd, "r");
1877 }
1879 if (!view->pipe)
1880 return FALSE;
1882 set_nonblocking_input(TRUE);
1884 view->offset = 0;
1885 view->lines = 0;
1886 view->lineno = 0;
1887 string_copy_rev(view->vid, view->id);
1889 if (view->line) {
1890 int i;
1892 for (i = 0; i < view->lines; i++)
1893 if (view->line[i].data)
1894 free(view->line[i].data);
1896 free(view->line);
1897 view->line = NULL;
1898 }
1900 view->start_time = time(NULL);
1902 return TRUE;
1903 }
1905 static struct line *
1906 realloc_lines(struct view *view, size_t line_size)
1907 {
1908 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1910 if (!tmp)
1911 return NULL;
1913 view->line = tmp;
1914 view->line_size = line_size;
1915 return view->line;
1916 }
1918 static bool
1919 update_view(struct view *view)
1920 {
1921 char in_buffer[BUFSIZ];
1922 char out_buffer[BUFSIZ * 2];
1923 char *line;
1924 /* The number of lines to read. If too low it will cause too much
1925 * redrawing (and possible flickering), if too high responsiveness
1926 * will suffer. */
1927 unsigned long lines = view->height;
1928 int redraw_from = -1;
1930 if (!view->pipe)
1931 return TRUE;
1933 /* Only redraw if lines are visible. */
1934 if (view->offset + view->height >= view->lines)
1935 redraw_from = view->lines - view->offset;
1937 /* FIXME: This is probably not perfect for backgrounded views. */
1938 if (!realloc_lines(view, view->lines + lines))
1939 goto alloc_error;
1941 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1942 size_t linelen = strlen(line);
1944 if (linelen)
1945 line[linelen - 1] = 0;
1947 if (opt_iconv != ICONV_NONE) {
1948 ICONV_CONST char *inbuf = line;
1949 size_t inlen = linelen;
1951 char *outbuf = out_buffer;
1952 size_t outlen = sizeof(out_buffer);
1954 size_t ret;
1956 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1957 if (ret != (size_t) -1) {
1958 line = out_buffer;
1959 linelen = strlen(out_buffer);
1960 }
1961 }
1963 if (!view->ops->read(view, line))
1964 goto alloc_error;
1966 if (lines-- == 1)
1967 break;
1968 }
1970 {
1971 int digits;
1973 lines = view->lines;
1974 for (digits = 0; lines; digits++)
1975 lines /= 10;
1977 /* Keep the displayed view in sync with line number scaling. */
1978 if (digits != view->digits) {
1979 view->digits = digits;
1980 redraw_from = 0;
1981 }
1982 }
1984 if (!view_is_displayed(view))
1985 goto check_pipe;
1987 if (view == VIEW(REQ_VIEW_TREE)) {
1988 /* Clear the view and redraw everything since the tree sorting
1989 * might have rearranged things. */
1990 redraw_view(view);
1992 } else if (redraw_from >= 0) {
1993 /* If this is an incremental update, redraw the previous line
1994 * since for commits some members could have changed when
1995 * loading the main view. */
1996 if (redraw_from > 0)
1997 redraw_from--;
1999 /* Since revision graph visualization requires knowledge
2000 * about the parent commit, it causes a further one-off
2001 * needed to be redrawn for incremental updates. */
2002 if (redraw_from > 0 && opt_rev_graph)
2003 redraw_from--;
2005 /* Incrementally draw avoids flickering. */
2006 redraw_view_from(view, redraw_from);
2007 }
2009 /* Update the title _after_ the redraw so that if the redraw picks up a
2010 * commit reference in view->ref it'll be available here. */
2011 update_view_title(view);
2013 check_pipe:
2014 if (ferror(view->pipe)) {
2015 report("Failed to read: %s", strerror(errno));
2016 goto end;
2018 } else if (feof(view->pipe)) {
2019 report("");
2020 goto end;
2021 }
2023 return TRUE;
2025 alloc_error:
2026 report("Allocation failure");
2028 end:
2029 view->ops->read(view, NULL);
2030 end_update(view);
2031 return FALSE;
2032 }
2034 static struct line *
2035 add_line_data(struct view *view, void *data, enum line_type type)
2036 {
2037 struct line *line = &view->line[view->lines++];
2039 memset(line, 0, sizeof(*line));
2040 line->type = type;
2041 line->data = data;
2043 return line;
2044 }
2046 static struct line *
2047 add_line_text(struct view *view, char *data, enum line_type type)
2048 {
2049 if (data)
2050 data = strdup(data);
2052 return data ? add_line_data(view, data, type) : NULL;
2053 }
2056 /*
2057 * View opening
2058 */
2060 enum open_flags {
2061 OPEN_DEFAULT = 0, /* Use default view switching. */
2062 OPEN_SPLIT = 1, /* Split current view. */
2063 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2064 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2065 };
2067 static void
2068 open_view(struct view *prev, enum request request, enum open_flags flags)
2069 {
2070 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2071 bool split = !!(flags & OPEN_SPLIT);
2072 bool reload = !!(flags & OPEN_RELOAD);
2073 struct view *view = VIEW(request);
2074 int nviews = displayed_views();
2075 struct view *base_view = display[0];
2077 if (view == prev && nviews == 1 && !reload) {
2078 report("Already in %s view", view->name);
2079 return;
2080 }
2082 if (view->ops->open) {
2083 if (!view->ops->open(view)) {
2084 report("Failed to load %s view", view->name);
2085 return;
2086 }
2088 } else if ((reload || strcmp(view->vid, view->id)) &&
2089 !begin_update(view)) {
2090 report("Failed to load %s view", view->name);
2091 return;
2092 }
2094 if (split) {
2095 display[1] = view;
2096 if (!backgrounded)
2097 current_view = 1;
2098 } else {
2099 /* Maximize the current view. */
2100 memset(display, 0, sizeof(display));
2101 current_view = 0;
2102 display[current_view] = view;
2103 }
2105 /* Resize the view when switching between split- and full-screen,
2106 * or when switching between two different full-screen views. */
2107 if (nviews != displayed_views() ||
2108 (nviews == 1 && base_view != display[0]))
2109 resize_display();
2111 if (split && prev->lineno - prev->offset >= prev->height) {
2112 /* Take the title line into account. */
2113 int lines = prev->lineno - prev->offset - prev->height + 1;
2115 /* Scroll the view that was split if the current line is
2116 * outside the new limited view. */
2117 do_scroll_view(prev, lines);
2118 }
2120 if (prev && view != prev) {
2121 if (split && !backgrounded) {
2122 /* "Blur" the previous view. */
2123 update_view_title(prev);
2124 }
2126 view->parent = prev;
2127 }
2129 if (view->pipe && view->lines == 0) {
2130 /* Clear the old view and let the incremental updating refill
2131 * the screen. */
2132 wclear(view->win);
2133 report("");
2134 } else {
2135 redraw_view(view);
2136 report("");
2137 }
2139 /* If the view is backgrounded the above calls to report()
2140 * won't redraw the view title. */
2141 if (backgrounded)
2142 update_view_title(view);
2143 }
2145 static void
2146 open_editor(struct view *view, char *file)
2147 {
2148 char cmd[SIZEOF_STR];
2149 char file_sq[SIZEOF_STR];
2150 char *editor;
2152 editor = getenv("GIT_EDITOR");
2153 if (!editor && *opt_editor)
2154 editor = opt_editor;
2155 if (!editor)
2156 editor = getenv("VISUAL");
2157 if (!editor)
2158 editor = getenv("EDITOR");
2159 if (!editor)
2160 editor = "vi";
2162 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2163 string_format(cmd, "%s %s", editor, file_sq)) {
2164 def_prog_mode(); /* save current tty modes */
2165 endwin(); /* restore original tty modes */
2166 system(cmd);
2167 reset_prog_mode();
2168 redraw_display();
2169 }
2170 }
2172 /*
2173 * User request switch noodle
2174 */
2176 static int
2177 view_driver(struct view *view, enum request request)
2178 {
2179 int i;
2181 if (view && view->lines) {
2182 request = view->ops->request(view, request, &view->line[view->lineno]);
2183 if (request == REQ_NONE)
2184 return TRUE;
2185 }
2187 switch (request) {
2188 case REQ_MOVE_UP:
2189 case REQ_MOVE_DOWN:
2190 case REQ_MOVE_PAGE_UP:
2191 case REQ_MOVE_PAGE_DOWN:
2192 case REQ_MOVE_FIRST_LINE:
2193 case REQ_MOVE_LAST_LINE:
2194 move_view(view, request);
2195 break;
2197 case REQ_SCROLL_LINE_DOWN:
2198 case REQ_SCROLL_LINE_UP:
2199 case REQ_SCROLL_PAGE_DOWN:
2200 case REQ_SCROLL_PAGE_UP:
2201 scroll_view(view, request);
2202 break;
2204 case REQ_VIEW_BLOB:
2205 if (!ref_blob[0]) {
2206 report("No file chosen, press %s to open tree view",
2207 get_key(REQ_VIEW_TREE));
2208 break;
2209 }
2210 open_view(view, request, OPEN_DEFAULT);
2211 break;
2213 case REQ_VIEW_PAGER:
2214 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2215 report("No pager content, press %s to run command from prompt",
2216 get_key(REQ_PROMPT));
2217 break;
2218 }
2219 open_view(view, request, OPEN_DEFAULT);
2220 break;
2222 case REQ_VIEW_STAGE:
2223 if (!VIEW(REQ_VIEW_STAGE)->lines) {
2224 report("No stage content, press %s to open the status view and choose file",
2225 get_key(REQ_VIEW_STATUS));
2226 break;
2227 }
2228 open_view(view, request, OPEN_DEFAULT);
2229 break;
2231 case REQ_VIEW_MAIN:
2232 case REQ_VIEW_DIFF:
2233 case REQ_VIEW_LOG:
2234 case REQ_VIEW_TREE:
2235 case REQ_VIEW_HELP:
2236 case REQ_VIEW_STATUS:
2237 open_view(view, request, OPEN_DEFAULT);
2238 break;
2240 case REQ_NEXT:
2241 case REQ_PREVIOUS:
2242 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2244 if ((view == VIEW(REQ_VIEW_DIFF) &&
2245 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2246 (view == VIEW(REQ_VIEW_STAGE) &&
2247 view->parent == VIEW(REQ_VIEW_STATUS)) ||
2248 (view == VIEW(REQ_VIEW_BLOB) &&
2249 view->parent == VIEW(REQ_VIEW_TREE))) {
2250 int line;
2252 view = view->parent;
2253 line = view->lineno;
2254 move_view(view, request);
2255 if (view_is_displayed(view))
2256 update_view_title(view);
2257 if (line != view->lineno)
2258 view->ops->request(view, REQ_ENTER,
2259 &view->line[view->lineno]);
2261 } else {
2262 move_view(view, request);
2263 }
2264 break;
2266 case REQ_VIEW_NEXT:
2267 {
2268 int nviews = displayed_views();
2269 int next_view = (current_view + 1) % nviews;
2271 if (next_view == current_view) {
2272 report("Only one view is displayed");
2273 break;
2274 }
2276 current_view = next_view;
2277 /* Blur out the title of the previous view. */
2278 update_view_title(view);
2279 report("");
2280 break;
2281 }
2282 case REQ_TOGGLE_LINENO:
2283 opt_line_number = !opt_line_number;
2284 redraw_display();
2285 break;
2287 case REQ_TOGGLE_REV_GRAPH:
2288 opt_rev_graph = !opt_rev_graph;
2289 redraw_display();
2290 break;
2292 case REQ_PROMPT:
2293 /* Always reload^Wrerun commands from the prompt. */
2294 open_view(view, opt_request, OPEN_RELOAD);
2295 break;
2297 case REQ_SEARCH:
2298 case REQ_SEARCH_BACK:
2299 search_view(view, request);
2300 break;
2302 case REQ_FIND_NEXT:
2303 case REQ_FIND_PREV:
2304 find_next(view, request);
2305 break;
2307 case REQ_STOP_LOADING:
2308 for (i = 0; i < ARRAY_SIZE(views); i++) {
2309 view = &views[i];
2310 if (view->pipe)
2311 report("Stopped loading the %s view", view->name),
2312 end_update(view);
2313 }
2314 break;
2316 case REQ_SHOW_VERSION:
2317 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
2318 return TRUE;
2320 case REQ_SCREEN_RESIZE:
2321 resize_display();
2322 /* Fall-through */
2323 case REQ_SCREEN_REDRAW:
2324 redraw_display();
2325 break;
2327 case REQ_EDIT:
2328 report("Nothing to edit");
2329 break;
2331 case REQ_CHERRY_PICK:
2332 report("Nothing to cherry-pick");
2333 break;
2335 case REQ_ENTER:
2336 report("Nothing to enter");
2337 break;
2340 case REQ_VIEW_CLOSE:
2341 /* XXX: Mark closed views by letting view->parent point to the
2342 * view itself. Parents to closed view should never be
2343 * followed. */
2344 if (view->parent &&
2345 view->parent->parent != view->parent) {
2346 memset(display, 0, sizeof(display));
2347 current_view = 0;
2348 display[current_view] = view->parent;
2349 view->parent = view;
2350 resize_display();
2351 redraw_display();
2352 break;
2353 }
2354 /* Fall-through */
2355 case REQ_QUIT:
2356 return FALSE;
2358 default:
2359 /* An unknown key will show most commonly used commands. */
2360 report("Unknown key, press 'h' for help");
2361 return TRUE;
2362 }
2364 return TRUE;
2365 }
2368 /*
2369 * Pager backend
2370 */
2372 static bool
2373 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2374 {
2375 char *text = line->data;
2376 enum line_type type = line->type;
2377 int textlen = strlen(text);
2378 int attr;
2380 wmove(view->win, lineno, 0);
2382 if (selected) {
2383 type = LINE_CURSOR;
2384 wchgat(view->win, -1, 0, type, NULL);
2385 }
2387 attr = get_line_attr(type);
2388 wattrset(view->win, attr);
2390 if (opt_line_number || opt_tab_size < TABSIZE) {
2391 static char spaces[] = " ";
2392 int col_offset = 0, col = 0;
2394 if (opt_line_number) {
2395 unsigned long real_lineno = view->offset + lineno + 1;
2397 if (real_lineno == 1 ||
2398 (real_lineno % opt_num_interval) == 0) {
2399 wprintw(view->win, "%.*d", view->digits, real_lineno);
2401 } else {
2402 waddnstr(view->win, spaces,
2403 MIN(view->digits, STRING_SIZE(spaces)));
2404 }
2405 waddstr(view->win, ": ");
2406 col_offset = view->digits + 2;
2407 }
2409 while (text && col_offset + col < view->width) {
2410 int cols_max = view->width - col_offset - col;
2411 char *pos = text;
2412 int cols;
2414 if (*text == '\t') {
2415 text++;
2416 assert(sizeof(spaces) > TABSIZE);
2417 pos = spaces;
2418 cols = opt_tab_size - (col % opt_tab_size);
2420 } else {
2421 text = strchr(text, '\t');
2422 cols = line ? text - pos : strlen(pos);
2423 }
2425 waddnstr(view->win, pos, MIN(cols, cols_max));
2426 col += cols;
2427 }
2429 } else {
2430 int col = 0, pos = 0;
2432 for (; pos < textlen && col < view->width; pos++, col++)
2433 if (text[pos] == '\t')
2434 col += TABSIZE - (col % TABSIZE) - 1;
2436 waddnstr(view->win, text, pos);
2437 }
2439 return TRUE;
2440 }
2442 static bool
2443 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2444 {
2445 char refbuf[SIZEOF_STR];
2446 char *ref = NULL;
2447 FILE *pipe;
2449 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2450 return TRUE;
2452 pipe = popen(refbuf, "r");
2453 if (!pipe)
2454 return TRUE;
2456 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2457 ref = chomp_string(ref);
2458 pclose(pipe);
2460 if (!ref || !*ref)
2461 return TRUE;
2463 /* This is the only fatal call, since it can "corrupt" the buffer. */
2464 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2465 return FALSE;
2467 return TRUE;
2468 }
2470 static void
2471 add_pager_refs(struct view *view, struct line *line)
2472 {
2473 char buf[SIZEOF_STR];
2474 char *commit_id = line->data + STRING_SIZE("commit ");
2475 struct ref **refs;
2476 size_t bufpos = 0, refpos = 0;
2477 const char *sep = "Refs: ";
2478 bool is_tag = FALSE;
2480 assert(line->type == LINE_COMMIT);
2482 refs = get_refs(commit_id);
2483 if (!refs) {
2484 if (view == VIEW(REQ_VIEW_DIFF))
2485 goto try_add_describe_ref;
2486 return;
2487 }
2489 do {
2490 struct ref *ref = refs[refpos];
2491 char *fmt = ref->tag ? "%s[%s]" :
2492 ref->remote ? "%s<%s>" : "%s%s";
2494 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2495 return;
2496 sep = ", ";
2497 if (ref->tag)
2498 is_tag = TRUE;
2499 } while (refs[refpos++]->next);
2501 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2502 try_add_describe_ref:
2503 /* Add <tag>-g<commit_id> "fake" reference. */
2504 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2505 return;
2506 }
2508 if (bufpos == 0)
2509 return;
2511 if (!realloc_lines(view, view->line_size + 1))
2512 return;
2514 add_line_text(view, buf, LINE_PP_REFS);
2515 }
2517 static bool
2518 pager_read(struct view *view, char *data)
2519 {
2520 struct line *line;
2522 if (!data)
2523 return TRUE;
2525 line = add_line_text(view, data, get_line_type(data));
2526 if (!line)
2527 return FALSE;
2529 if (line->type == LINE_COMMIT &&
2530 (view == VIEW(REQ_VIEW_DIFF) ||
2531 view == VIEW(REQ_VIEW_LOG)))
2532 add_pager_refs(view, line);
2534 return TRUE;
2535 }
2537 static enum request
2538 pager_request(struct view *view, enum request request, struct line *line)
2539 {
2540 int split = 0;
2542 if (request != REQ_ENTER)
2543 return request;
2545 if (line->type == LINE_COMMIT &&
2546 (view == VIEW(REQ_VIEW_LOG) ||
2547 view == VIEW(REQ_VIEW_PAGER))) {
2548 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2549 split = 1;
2550 }
2552 /* Always scroll the view even if it was split. That way
2553 * you can use Enter to scroll through the log view and
2554 * split open each commit diff. */
2555 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2557 /* FIXME: A minor workaround. Scrolling the view will call report("")
2558 * but if we are scrolling a non-current view this won't properly
2559 * update the view title. */
2560 if (split)
2561 update_view_title(view);
2563 return REQ_NONE;
2564 }
2566 static bool
2567 pager_grep(struct view *view, struct line *line)
2568 {
2569 regmatch_t pmatch;
2570 char *text = line->data;
2572 if (!*text)
2573 return FALSE;
2575 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2576 return FALSE;
2578 return TRUE;
2579 }
2581 static void
2582 pager_select(struct view *view, struct line *line)
2583 {
2584 if (line->type == LINE_COMMIT) {
2585 char *text = line->data + STRING_SIZE("commit ");
2587 if (view != VIEW(REQ_VIEW_PAGER))
2588 string_copy_rev(view->ref, text);
2589 string_copy_rev(ref_commit, text);
2590 }
2591 }
2593 static struct view_ops pager_ops = {
2594 "line",
2595 NULL,
2596 pager_read,
2597 pager_draw,
2598 pager_request,
2599 pager_grep,
2600 pager_select,
2601 };
2604 /*
2605 * Help backend
2606 */
2608 static bool
2609 help_open(struct view *view)
2610 {
2611 char buf[BUFSIZ];
2612 int lines = ARRAY_SIZE(req_info) + 2;
2613 int i;
2615 if (view->lines > 0)
2616 return TRUE;
2618 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2619 if (!req_info[i].request)
2620 lines++;
2622 view->line = calloc(lines, sizeof(*view->line));
2623 if (!view->line)
2624 return FALSE;
2626 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2628 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2629 char *key;
2631 if (!req_info[i].request) {
2632 add_line_text(view, "", LINE_DEFAULT);
2633 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2634 continue;
2635 }
2637 key = get_key(req_info[i].request);
2638 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2639 continue;
2641 add_line_text(view, buf, LINE_DEFAULT);
2642 }
2644 return TRUE;
2645 }
2647 static struct view_ops help_ops = {
2648 "line",
2649 help_open,
2650 NULL,
2651 pager_draw,
2652 pager_request,
2653 pager_grep,
2654 pager_select,
2655 };
2658 /*
2659 * Tree backend
2660 */
2662 struct tree_stack_entry {
2663 struct tree_stack_entry *prev; /* Entry below this in the stack */
2664 unsigned long lineno; /* Line number to restore */
2665 char *name; /* Position of name in opt_path */
2666 };
2668 /* The top of the path stack. */
2669 static struct tree_stack_entry *tree_stack = NULL;
2670 unsigned long tree_lineno = 0;
2672 static void
2673 pop_tree_stack_entry(void)
2674 {
2675 struct tree_stack_entry *entry = tree_stack;
2677 tree_lineno = entry->lineno;
2678 entry->name[0] = 0;
2679 tree_stack = entry->prev;
2680 free(entry);
2681 }
2683 static void
2684 push_tree_stack_entry(char *name, unsigned long lineno)
2685 {
2686 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
2687 size_t pathlen = strlen(opt_path);
2689 if (!entry)
2690 return;
2692 entry->prev = tree_stack;
2693 entry->name = opt_path + pathlen;
2694 tree_stack = entry;
2696 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
2697 pop_tree_stack_entry();
2698 return;
2699 }
2701 /* Move the current line to the first tree entry. */
2702 tree_lineno = 1;
2703 entry->lineno = lineno;
2704 }
2706 /* Parse output from git-ls-tree(1):
2707 *
2708 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2709 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2710 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2711 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2712 */
2714 #define SIZEOF_TREE_ATTR \
2715 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2717 #define TREE_UP_FORMAT "040000 tree %s\t.."
2719 static int
2720 tree_compare_entry(enum line_type type1, char *name1,
2721 enum line_type type2, char *name2)
2722 {
2723 if (type1 != type2) {
2724 if (type1 == LINE_TREE_DIR)
2725 return -1;
2726 return 1;
2727 }
2729 return strcmp(name1, name2);
2730 }
2732 static bool
2733 tree_read(struct view *view, char *text)
2734 {
2735 size_t textlen = text ? strlen(text) : 0;
2736 char buf[SIZEOF_STR];
2737 unsigned long pos;
2738 enum line_type type;
2739 bool first_read = view->lines == 0;
2741 if (textlen <= SIZEOF_TREE_ATTR)
2742 return FALSE;
2744 type = text[STRING_SIZE("100644 ")] == 't'
2745 ? LINE_TREE_DIR : LINE_TREE_FILE;
2747 if (first_read) {
2748 /* Add path info line */
2749 if (!string_format(buf, "Directory path /%s", opt_path) ||
2750 !realloc_lines(view, view->line_size + 1) ||
2751 !add_line_text(view, buf, LINE_DEFAULT))
2752 return FALSE;
2754 /* Insert "link" to parent directory. */
2755 if (*opt_path) {
2756 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
2757 !realloc_lines(view, view->line_size + 1) ||
2758 !add_line_text(view, buf, LINE_TREE_DIR))
2759 return FALSE;
2760 }
2761 }
2763 /* Strip the path part ... */
2764 if (*opt_path) {
2765 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2766 size_t striplen = strlen(opt_path);
2767 char *path = text + SIZEOF_TREE_ATTR;
2769 if (pathlen > striplen)
2770 memmove(path, path + striplen,
2771 pathlen - striplen + 1);
2772 }
2774 /* Skip "Directory ..." and ".." line. */
2775 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2776 struct line *line = &view->line[pos];
2777 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2778 char *path2 = text + SIZEOF_TREE_ATTR;
2779 int cmp = tree_compare_entry(line->type, path1, type, path2);
2781 if (cmp <= 0)
2782 continue;
2784 text = strdup(text);
2785 if (!text)
2786 return FALSE;
2788 if (view->lines > pos)
2789 memmove(&view->line[pos + 1], &view->line[pos],
2790 (view->lines - pos) * sizeof(*line));
2792 line = &view->line[pos];
2793 line->data = text;
2794 line->type = type;
2795 view->lines++;
2796 return TRUE;
2797 }
2799 if (!add_line_text(view, text, type))
2800 return FALSE;
2802 if (tree_lineno > view->lineno) {
2803 view->lineno = tree_lineno;
2804 tree_lineno = 0;
2805 }
2807 return TRUE;
2808 }
2810 static enum request
2811 tree_request(struct view *view, enum request request, struct line *line)
2812 {
2813 enum open_flags flags;
2815 if (request != REQ_ENTER)
2816 return request;
2818 /* Cleanup the stack if the tree view is at a different tree. */
2819 while (!*opt_path && tree_stack)
2820 pop_tree_stack_entry();
2822 switch (line->type) {
2823 case LINE_TREE_DIR:
2824 /* Depending on whether it is a subdir or parent (updir?) link
2825 * mangle the path buffer. */
2826 if (line == &view->line[1] && *opt_path) {
2827 pop_tree_stack_entry();
2829 } else {
2830 char *data = line->data;
2831 char *basename = data + SIZEOF_TREE_ATTR;
2833 push_tree_stack_entry(basename, view->lineno);
2834 }
2836 /* Trees and subtrees share the same ID, so they are not not
2837 * unique like blobs. */
2838 flags = OPEN_RELOAD;
2839 request = REQ_VIEW_TREE;
2840 break;
2842 case LINE_TREE_FILE:
2843 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2844 request = REQ_VIEW_BLOB;
2845 break;
2847 default:
2848 return TRUE;
2849 }
2851 open_view(view, request, flags);
2852 if (request == REQ_VIEW_TREE) {
2853 view->lineno = tree_lineno;
2854 }
2856 return REQ_NONE;
2857 }
2859 static void
2860 tree_select(struct view *view, struct line *line)
2861 {
2862 char *text = line->data + STRING_SIZE("100644 blob ");
2864 if (line->type == LINE_TREE_FILE) {
2865 string_copy_rev(ref_blob, text);
2867 } else if (line->type != LINE_TREE_DIR) {
2868 return;
2869 }
2871 string_copy_rev(view->ref, text);
2872 }
2874 static struct view_ops tree_ops = {
2875 "file",
2876 NULL,
2877 tree_read,
2878 pager_draw,
2879 tree_request,
2880 pager_grep,
2881 tree_select,
2882 };
2884 static bool
2885 blob_read(struct view *view, char *line)
2886 {
2887 return add_line_text(view, line, LINE_DEFAULT) != NULL;
2888 }
2890 static struct view_ops blob_ops = {
2891 "line",
2892 NULL,
2893 blob_read,
2894 pager_draw,
2895 pager_request,
2896 pager_grep,
2897 pager_select,
2898 };
2901 /*
2902 * Status backend
2903 */
2905 struct status {
2906 char status;
2907 struct {
2908 mode_t mode;
2909 char rev[SIZEOF_REV];
2910 } old;
2911 struct {
2912 mode_t mode;
2913 char rev[SIZEOF_REV];
2914 } new;
2915 char name[SIZEOF_STR];
2916 };
2918 static struct status stage_status;
2919 static enum line_type stage_line_type;
2921 /* Get fields from the diff line:
2922 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
2923 */
2924 static inline bool
2925 status_get_diff(struct status *file, char *buf, size_t bufsize)
2926 {
2927 char *old_mode = buf + 1;
2928 char *new_mode = buf + 8;
2929 char *old_rev = buf + 15;
2930 char *new_rev = buf + 56;
2931 char *status = buf + 97;
2933 if (bufsize != 99 ||
2934 old_mode[-1] != ':' ||
2935 new_mode[-1] != ' ' ||
2936 old_rev[-1] != ' ' ||
2937 new_rev[-1] != ' ' ||
2938 status[-1] != ' ')
2939 return FALSE;
2941 file->status = *status;
2943 string_copy_rev(file->old.rev, old_rev);
2944 string_copy_rev(file->new.rev, new_rev);
2946 file->old.mode = strtoul(old_mode, NULL, 8);
2947 file->new.mode = strtoul(new_mode, NULL, 8);
2949 file->name[0] = 0;
2951 return TRUE;
2952 }
2954 static bool
2955 status_run(struct view *view, const char cmd[], bool diff, enum line_type type)
2956 {
2957 struct status *file = NULL;
2958 char buf[SIZEOF_STR * 4];
2959 size_t bufsize = 0;
2960 FILE *pipe;
2962 pipe = popen(cmd, "r");
2963 if (!pipe)
2964 return FALSE;
2966 add_line_data(view, NULL, type);
2968 while (!feof(pipe) && !ferror(pipe)) {
2969 char *sep;
2970 size_t readsize;
2972 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
2973 if (!readsize)
2974 break;
2975 bufsize += readsize;
2977 /* Process while we have NUL chars. */
2978 while ((sep = memchr(buf, 0, bufsize))) {
2979 size_t sepsize = sep - buf + 1;
2981 if (!file) {
2982 if (!realloc_lines(view, view->line_size + 1))
2983 goto error_out;
2985 file = calloc(1, sizeof(*file));
2986 if (!file)
2987 goto error_out;
2989 add_line_data(view, file, type);
2990 }
2992 /* Parse diff info part. */
2993 if (!diff) {
2994 file->status = '?';
2996 } else if (!file->status) {
2997 if (!status_get_diff(file, buf, sepsize))
2998 goto error_out;
3000 bufsize -= sepsize;
3001 memmove(buf, sep + 1, bufsize);
3003 sep = memchr(buf, 0, bufsize);
3004 if (!sep)
3005 break;
3006 sepsize = sep - buf + 1;
3007 }
3009 /* git-ls-files just delivers a NUL separated
3010 * list of file names similar to the second half
3011 * of the git-diff-* output. */
3012 string_ncopy(file->name, buf, sepsize);
3013 bufsize -= sepsize;
3014 memmove(buf, sep + 1, bufsize);
3015 file = NULL;
3016 }
3017 }
3019 if (ferror(pipe)) {
3020 error_out:
3021 pclose(pipe);
3022 return FALSE;
3023 }
3025 if (!view->line[view->lines - 1].data)
3026 add_line_data(view, NULL, LINE_STAT_NONE);
3028 pclose(pipe);
3029 return TRUE;
3030 }
3032 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --cached HEAD"
3033 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
3034 #define STATUS_LIST_OTHER_CMD \
3035 "git ls-files -z --others --exclude-per-directory=.gitignore"
3037 #define STATUS_DIFF_SHOW_CMD \
3038 "git diff --root --patch-with-stat --find-copies-harder -B -C %s -- %s 2>/dev/null"
3040 /* First parse staged info using git-diff-index(1), then parse unstaged
3041 * info using git-diff-files(1), and finally untracked files using
3042 * git-ls-files(1). */
3043 static bool
3044 status_open(struct view *view)
3045 {
3046 struct stat statbuf;
3047 char exclude[SIZEOF_STR];
3048 char cmd[SIZEOF_STR];
3049 size_t i;
3051 for (i = 0; i < view->lines; i++)
3052 free(view->line[i].data);
3053 free(view->line);
3054 view->lines = view->line_size = 0;
3055 view->line = NULL;
3057 if (!realloc_lines(view, view->line_size + 6))
3058 return FALSE;
3060 if (!string_format(exclude, "%s/info/exclude", opt_git_dir))
3061 return FALSE;
3063 string_copy(cmd, STATUS_LIST_OTHER_CMD);
3065 if (stat(exclude, &statbuf) >= 0) {
3066 size_t cmdsize = strlen(cmd);
3068 if (!string_format_from(cmd, &cmdsize, " %s", "--exclude-from=") ||
3069 sq_quote(cmd, cmdsize, exclude) >= sizeof(cmd))
3070 return FALSE;
3071 }
3073 if (!status_run(view, STATUS_DIFF_INDEX_CMD, TRUE, LINE_STAT_STAGED) ||
3074 !status_run(view, STATUS_DIFF_FILES_CMD, TRUE, LINE_STAT_UNSTAGED) ||
3075 !status_run(view, cmd, FALSE, LINE_STAT_UNTRACKED))
3076 return FALSE;
3078 return TRUE;
3079 }
3081 static bool
3082 status_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3083 {
3084 struct status *status = line->data;
3086 wmove(view->win, lineno, 0);
3088 if (selected) {
3089 wattrset(view->win, get_line_attr(LINE_CURSOR));
3090 wchgat(view->win, -1, 0, LINE_CURSOR, NULL);
3092 } else if (!status && line->type != LINE_STAT_NONE) {
3093 wattrset(view->win, get_line_attr(LINE_STAT_SECTION));
3094 wchgat(view->win, -1, 0, LINE_STAT_SECTION, NULL);
3096 } else {
3097 wattrset(view->win, get_line_attr(line->type));
3098 }
3100 if (!status) {
3101 char *text;
3103 switch (line->type) {
3104 case LINE_STAT_STAGED:
3105 text = "Changes to be committed:";
3106 break;
3108 case LINE_STAT_UNSTAGED:
3109 text = "Changed but not updated:";
3110 break;
3112 case LINE_STAT_UNTRACKED:
3113 text = "Untracked files:";
3114 break;
3116 case LINE_STAT_NONE:
3117 text = " (no files)";
3118 break;
3120 default:
3121 return FALSE;
3122 }
3124 waddstr(view->win, text);
3125 return TRUE;
3126 }
3128 waddch(view->win, status->status);
3129 if (!selected)
3130 wattrset(view->win, A_NORMAL);
3131 wmove(view->win, lineno, 4);
3132 waddstr(view->win, status->name);
3134 return TRUE;
3135 }
3137 static enum request
3138 status_enter(struct view *view, struct line *line)
3139 {
3140 struct status *status = line->data;
3141 char path[SIZEOF_STR] = "";
3142 char *info;
3143 size_t cmdsize = 0;
3145 if (line->type == LINE_STAT_NONE ||
3146 (!status && line[1].type == LINE_STAT_NONE)) {
3147 report("No file to diff");
3148 return REQ_NONE;
3149 }
3151 if (status && sq_quote(path, 0, status->name) >= sizeof(path))
3152 return REQ_QUIT;
3154 if (opt_cdup[0] &&
3155 line->type != LINE_STAT_UNTRACKED &&
3156 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
3157 return REQ_QUIT;
3159 switch (line->type) {
3160 case LINE_STAT_STAGED:
3161 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3162 "--cached", path))
3163 return REQ_QUIT;
3164 if (status)
3165 info = "Staged changes to %s";
3166 else
3167 info = "Staged changes";
3168 break;
3170 case LINE_STAT_UNSTAGED:
3171 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3172 "", path))
3173 return REQ_QUIT;
3174 if (status)
3175 info = "Unstaged changes to %s";
3176 else
3177 info = "Unstaged changes";
3178 break;
3180 case LINE_STAT_UNTRACKED:
3181 if (opt_pipe)
3182 return REQ_QUIT;
3185 if (!status) {
3186 report("No file to show");
3187 return REQ_NONE;
3188 }
3190 opt_pipe = fopen(status->name, "r");
3191 info = "Untracked file %s";
3192 break;
3194 default:
3195 die("w00t");
3196 }
3198 open_view(view, REQ_VIEW_STAGE, OPEN_RELOAD | OPEN_SPLIT);
3199 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
3200 if (status) {
3201 stage_status = *status;
3202 } else {
3203 memset(&stage_status, 0, sizeof(stage_status));
3204 }
3206 stage_line_type = line->type;
3207 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.name);
3208 }
3210 return REQ_NONE;
3211 }
3214 static bool
3215 status_update_file(struct view *view, struct status *status, enum line_type type)
3216 {
3217 char cmd[SIZEOF_STR];
3218 char buf[SIZEOF_STR];
3219 size_t cmdsize = 0;
3220 size_t bufsize = 0;
3221 size_t written = 0;
3222 FILE *pipe;
3224 if (opt_cdup[0] &&
3225 type != LINE_STAT_UNTRACKED &&
3226 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3227 return FALSE;
3229 switch (type) {
3230 case LINE_STAT_STAGED:
3231 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
3232 status->old.mode,
3233 status->old.rev,
3234 status->name, 0))
3235 return FALSE;
3237 string_add(cmd, cmdsize, "git update-index -z --index-info");
3238 break;
3240 case LINE_STAT_UNSTAGED:
3241 case LINE_STAT_UNTRACKED:
3242 if (!string_format_from(buf, &bufsize, "%s%c", status->name, 0))
3243 return FALSE;
3245 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
3246 break;
3248 default:
3249 die("w00t");
3250 }
3252 pipe = popen(cmd, "w");
3253 if (!pipe)
3254 return FALSE;
3256 while (!ferror(pipe) && written < bufsize) {
3257 written += fwrite(buf + written, 1, bufsize - written, pipe);
3258 }
3260 pclose(pipe);
3262 if (written != bufsize)
3263 return FALSE;
3265 return TRUE;
3266 }
3268 static void
3269 status_update(struct view *view)
3270 {
3271 struct line *line = &view->line[view->lineno];
3273 assert(view->lines);
3275 if (!line->data) {
3276 while (++line < view->line + view->lines && line->data) {
3277 if (!status_update_file(view, line->data, line->type))
3278 report("Failed to update file status");
3279 }
3281 if (!line[-1].data) {
3282 report("Nothing to update");
3283 return;
3284 }
3286 } else if (!status_update_file(view, line->data, line->type)) {
3287 report("Failed to update file status");
3288 }
3290 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3291 }
3293 static enum request
3294 status_request(struct view *view, enum request request, struct line *line)
3295 {
3296 struct status *status = line->data;
3298 switch (request) {
3299 case REQ_STATUS_UPDATE:
3300 status_update(view);
3301 break;
3303 case REQ_EDIT:
3304 if (!status)
3305 return request;
3307 open_editor(view, status->name);
3308 break;
3310 case REQ_ENTER:
3311 status_enter(view, line);
3312 break;
3314 default:
3315 return request;
3316 }
3318 return REQ_NONE;
3319 }
3321 static void
3322 status_select(struct view *view, struct line *line)
3323 {
3324 struct status *status = line->data;
3325 char file[SIZEOF_STR] = "all files";
3326 char *text;
3328 if (status && !string_format(file, "'%s'", status->name))
3329 return;
3331 if (!status && line[1].type == LINE_STAT_NONE)
3332 line++;
3334 switch (line->type) {
3335 case LINE_STAT_STAGED:
3336 text = "Press %s to unstage %s for commit";
3337 break;
3339 case LINE_STAT_UNSTAGED:
3340 text = "Press %s to stage %s for commit";
3341 break;
3343 case LINE_STAT_UNTRACKED:
3344 text = "Press %s to stage %s for addition";
3345 break;
3347 case LINE_STAT_NONE:
3348 text = "Nothing to update";
3349 break;
3351 default:
3352 die("w00t");
3353 }
3355 string_format(view->ref, text, get_key(REQ_STATUS_UPDATE), file);
3356 }
3358 static bool
3359 status_grep(struct view *view, struct line *line)
3360 {
3361 struct status *status = line->data;
3362 enum { S_STATUS, S_NAME, S_END } state;
3363 char buf[2] = "?";
3364 regmatch_t pmatch;
3366 if (!status)
3367 return FALSE;
3369 for (state = S_STATUS; state < S_END; state++) {
3370 char *text;
3372 switch (state) {
3373 case S_NAME: text = status->name; break;
3374 case S_STATUS:
3375 buf[0] = status->status;
3376 text = buf;
3377 break;
3379 default:
3380 return FALSE;
3381 }
3383 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3384 return TRUE;
3385 }
3387 return FALSE;
3388 }
3390 static struct view_ops status_ops = {
3391 "file",
3392 status_open,
3393 NULL,
3394 status_draw,
3395 status_request,
3396 status_grep,
3397 status_select,
3398 };
3401 static bool
3402 stage_diff_line(FILE *pipe, struct line *line)
3403 {
3404 char *buf = line->data;
3405 size_t bufsize = strlen(buf);
3406 size_t written = 0;
3408 while (!ferror(pipe) && written < bufsize) {
3409 written += fwrite(buf + written, 1, bufsize - written, pipe);
3410 }
3412 fputc('\n', pipe);
3414 return written == bufsize;
3415 }
3417 static struct line *
3418 stage_diff_hdr(struct view *view, struct line *line)
3419 {
3420 int diff_hdr_dir = line->type == LINE_DIFF_CHUNK ? -1 : 1;
3421 struct line *diff_hdr;
3423 if (line->type == LINE_DIFF_CHUNK)
3424 diff_hdr = line - 1;
3425 else
3426 diff_hdr = view->line + 1;
3428 while (diff_hdr > view->line && diff_hdr < view->line + view->lines) {
3429 if (diff_hdr->type == LINE_DIFF_HEADER)
3430 return diff_hdr;
3432 diff_hdr += diff_hdr_dir;
3433 }
3435 return NULL;
3436 }
3438 static bool
3439 stage_update_chunk(struct view *view, struct line *line)
3440 {
3441 char cmd[SIZEOF_STR];
3442 size_t cmdsize = 0;
3443 struct line *diff_hdr, *diff_chunk, *diff_end;
3444 FILE *pipe;
3446 diff_hdr = stage_diff_hdr(view, line);
3447 if (!diff_hdr)
3448 return FALSE;
3450 if (opt_cdup[0] &&
3451 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3452 return FALSE;
3454 if (!string_format_from(cmd, &cmdsize,
3455 "git apply --cached %s - && "
3456 "git update-index -q --unmerged --refresh 2>/dev/null",
3457 stage_line_type == LINE_STAT_STAGED ? "-R" : ""))
3458 return FALSE;
3460 pipe = popen(cmd, "w");
3461 if (!pipe)
3462 return FALSE;
3464 diff_end = view->line + view->lines;
3465 if (line->type != LINE_DIFF_CHUNK) {
3466 diff_chunk = diff_hdr;
3468 } else {
3469 for (diff_chunk = line + 1; diff_chunk < diff_end; diff_chunk++)
3470 if (diff_chunk->type == LINE_DIFF_CHUNK ||
3471 diff_chunk->type == LINE_DIFF_HEADER)
3472 diff_end = diff_chunk;
3474 diff_chunk = line;
3476 while (diff_hdr->type != LINE_DIFF_CHUNK) {
3477 switch (diff_hdr->type) {
3478 case LINE_DIFF_HEADER:
3479 case LINE_DIFF_INDEX:
3480 case LINE_DIFF_ADD:
3481 case LINE_DIFF_DEL:
3482 break;
3484 default:
3485 diff_hdr++;
3486 continue;
3487 }
3489 if (!stage_diff_line(pipe, diff_hdr++)) {
3490 pclose(pipe);
3491 return FALSE;
3492 }
3493 }
3494 }
3496 while (diff_chunk < diff_end && stage_diff_line(pipe, diff_chunk))
3497 diff_chunk++;
3499 pclose(pipe);
3501 if (diff_chunk != diff_end)
3502 return FALSE;
3504 return TRUE;
3505 }
3507 static void
3508 stage_update(struct view *view, struct line *line)
3509 {
3510 if (stage_line_type != LINE_STAT_UNTRACKED &&
3511 (line->type == LINE_DIFF_CHUNK || !stage_status.status)) {
3512 if (!stage_update_chunk(view, line)) {
3513 report("Failed to apply chunk");
3514 return;
3515 }
3517 } else if (!status_update_file(view, &stage_status, stage_line_type)) {
3518 report("Failed to update file");
3519 return;
3520 }
3522 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3524 view = VIEW(REQ_VIEW_STATUS);
3525 if (view_is_displayed(view))
3526 status_enter(view, &view->line[view->lineno]);
3527 }
3529 static enum request
3530 stage_request(struct view *view, enum request request, struct line *line)
3531 {
3532 switch (request) {
3533 case REQ_STATUS_UPDATE:
3534 stage_update(view, line);
3535 break;
3537 case REQ_EDIT:
3538 if (!stage_status.name[0])
3539 return request;
3541 open_editor(view, stage_status.name);
3542 break;
3544 case REQ_ENTER:
3545 pager_request(view, request, line);
3546 break;
3548 default:
3549 return request;
3550 }
3552 return REQ_NONE;
3553 }
3555 static struct view_ops stage_ops = {
3556 "line",
3557 NULL,
3558 pager_read,
3559 pager_draw,
3560 stage_request,
3561 pager_grep,
3562 pager_select,
3563 };
3566 /*
3567 * Revision graph
3568 */
3570 struct commit {
3571 char id[SIZEOF_REV]; /* SHA1 ID. */
3572 char title[128]; /* First line of the commit message. */
3573 char author[75]; /* Author of the commit. */
3574 struct tm time; /* Date from the author ident. */
3575 struct ref **refs; /* Repository references. */
3576 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
3577 size_t graph_size; /* The width of the graph array. */
3578 };
3580 /* Size of rev graph with no "padding" columns */
3581 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
3583 struct rev_graph {
3584 struct rev_graph *prev, *next, *parents;
3585 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
3586 size_t size;
3587 struct commit *commit;
3588 size_t pos;
3589 };
3591 /* Parents of the commit being visualized. */
3592 static struct rev_graph graph_parents[4];
3594 /* The current stack of revisions on the graph. */
3595 static struct rev_graph graph_stacks[4] = {
3596 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
3597 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
3598 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
3599 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
3600 };
3602 static inline bool
3603 graph_parent_is_merge(struct rev_graph *graph)
3604 {
3605 return graph->parents->size > 1;
3606 }
3608 static inline void
3609 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
3610 {
3611 struct commit *commit = graph->commit;
3613 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
3614 commit->graph[commit->graph_size++] = symbol;
3615 }
3617 static void
3618 done_rev_graph(struct rev_graph *graph)
3619 {
3620 if (graph_parent_is_merge(graph) &&
3621 graph->pos < graph->size - 1 &&
3622 graph->next->size == graph->size + graph->parents->size - 1) {
3623 size_t i = graph->pos + graph->parents->size - 1;
3625 graph->commit->graph_size = i * 2;
3626 while (i < graph->next->size - 1) {
3627 append_to_rev_graph(graph, ' ');
3628 append_to_rev_graph(graph, '\\');
3629 i++;
3630 }
3631 }
3633 graph->size = graph->pos = 0;
3634 graph->commit = NULL;
3635 memset(graph->parents, 0, sizeof(*graph->parents));
3636 }
3638 static void
3639 push_rev_graph(struct rev_graph *graph, char *parent)
3640 {
3641 int i;
3643 /* "Collapse" duplicate parents lines.
3644 *
3645 * FIXME: This needs to also update update the drawn graph but
3646 * for now it just serves as a method for pruning graph lines. */
3647 for (i = 0; i < graph->size; i++)
3648 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
3649 return;
3651 if (graph->size < SIZEOF_REVITEMS) {
3652 string_copy_rev(graph->rev[graph->size++], parent);
3653 }
3654 }
3656 static chtype
3657 get_rev_graph_symbol(struct rev_graph *graph)
3658 {
3659 chtype symbol;
3661 if (graph->parents->size == 0)
3662 symbol = REVGRAPH_INIT;
3663 else if (graph_parent_is_merge(graph))
3664 symbol = REVGRAPH_MERGE;
3665 else if (graph->pos >= graph->size)
3666 symbol = REVGRAPH_BRANCH;
3667 else
3668 symbol = REVGRAPH_COMMIT;
3670 return symbol;
3671 }
3673 static void
3674 draw_rev_graph(struct rev_graph *graph)
3675 {
3676 struct rev_filler {
3677 chtype separator, line;
3678 };
3679 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
3680 static struct rev_filler fillers[] = {
3681 { ' ', REVGRAPH_LINE },
3682 { '`', '.' },
3683 { '\'', ' ' },
3684 { '/', ' ' },
3685 };
3686 chtype symbol = get_rev_graph_symbol(graph);
3687 struct rev_filler *filler;
3688 size_t i;
3690 filler = &fillers[DEFAULT];
3692 for (i = 0; i < graph->pos; i++) {
3693 append_to_rev_graph(graph, filler->line);
3694 if (graph_parent_is_merge(graph->prev) &&
3695 graph->prev->pos == i)
3696 filler = &fillers[RSHARP];
3698 append_to_rev_graph(graph, filler->separator);
3699 }
3701 /* Place the symbol for this revision. */
3702 append_to_rev_graph(graph, symbol);
3704 if (graph->prev->size > graph->size)
3705 filler = &fillers[RDIAG];
3706 else
3707 filler = &fillers[DEFAULT];
3709 i++;
3711 for (; i < graph->size; i++) {
3712 append_to_rev_graph(graph, filler->separator);
3713 append_to_rev_graph(graph, filler->line);
3714 if (graph_parent_is_merge(graph->prev) &&
3715 i < graph->prev->pos + graph->parents->size)
3716 filler = &fillers[RSHARP];
3717 if (graph->prev->size > graph->size)
3718 filler = &fillers[LDIAG];
3719 }
3721 if (graph->prev->size > graph->size) {
3722 append_to_rev_graph(graph, filler->separator);
3723 if (filler->line != ' ')
3724 append_to_rev_graph(graph, filler->line);
3725 }
3726 }
3728 /* Prepare the next rev graph */
3729 static void
3730 prepare_rev_graph(struct rev_graph *graph)
3731 {
3732 size_t i;
3734 /* First, traverse all lines of revisions up to the active one. */
3735 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
3736 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
3737 break;
3739 push_rev_graph(graph->next, graph->rev[graph->pos]);
3740 }
3742 /* Interleave the new revision parent(s). */
3743 for (i = 0; i < graph->parents->size; i++)
3744 push_rev_graph(graph->next, graph->parents->rev[i]);
3746 /* Lastly, put any remaining revisions. */
3747 for (i = graph->pos + 1; i < graph->size; i++)
3748 push_rev_graph(graph->next, graph->rev[i]);
3749 }
3751 static void
3752 update_rev_graph(struct rev_graph *graph)
3753 {
3754 /* If this is the finalizing update ... */
3755 if (graph->commit)
3756 prepare_rev_graph(graph);
3758 /* Graph visualization needs a one rev look-ahead,
3759 * so the first update doesn't visualize anything. */
3760 if (!graph->prev->commit)
3761 return;
3763 draw_rev_graph(graph->prev);
3764 done_rev_graph(graph->prev->prev);
3765 }
3768 /*
3769 * Main view backend
3770 */
3772 static bool
3773 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3774 {
3775 char buf[DATE_COLS + 1];
3776 struct commit *commit = line->data;
3777 enum line_type type;
3778 int col = 0;
3779 size_t timelen;
3780 size_t authorlen;
3781 int trimmed = 1;
3783 if (!*commit->author)
3784 return FALSE;
3786 wmove(view->win, lineno, col);
3788 if (selected) {
3789 type = LINE_CURSOR;
3790 wattrset(view->win, get_line_attr(type));
3791 wchgat(view->win, -1, 0, type, NULL);
3793 } else {
3794 type = LINE_MAIN_COMMIT;
3795 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
3796 }
3798 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
3799 waddnstr(view->win, buf, timelen);
3800 waddstr(view->win, " ");
3802 col += DATE_COLS;
3803 wmove(view->win, lineno, col);
3804 if (type != LINE_CURSOR)
3805 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
3807 if (opt_utf8) {
3808 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
3809 } else {
3810 authorlen = strlen(commit->author);
3811 if (authorlen > AUTHOR_COLS - 2) {
3812 authorlen = AUTHOR_COLS - 2;
3813 trimmed = 1;
3814 }
3815 }
3817 if (trimmed) {
3818 waddnstr(view->win, commit->author, authorlen);
3819 if (type != LINE_CURSOR)
3820 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
3821 waddch(view->win, '~');
3822 } else {
3823 waddstr(view->win, commit->author);
3824 }
3826 col += AUTHOR_COLS;
3827 if (type != LINE_CURSOR)
3828 wattrset(view->win, A_NORMAL);
3830 if (opt_rev_graph && commit->graph_size) {
3831 size_t i;
3833 wmove(view->win, lineno, col);
3834 /* Using waddch() instead of waddnstr() ensures that
3835 * they'll be rendered correctly for the cursor line. */
3836 for (i = 0; i < commit->graph_size; i++)
3837 waddch(view->win, commit->graph[i]);
3839 waddch(view->win, ' ');
3840 col += commit->graph_size + 1;
3841 }
3843 wmove(view->win, lineno, col);
3845 if (commit->refs) {
3846 size_t i = 0;
3848 do {
3849 if (type == LINE_CURSOR)
3850 ;
3851 else if (commit->refs[i]->tag)
3852 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
3853 else if (commit->refs[i]->remote)
3854 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
3855 else
3856 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
3857 waddstr(view->win, "[");
3858 waddstr(view->win, commit->refs[i]->name);
3859 waddstr(view->win, "]");
3860 if (type != LINE_CURSOR)
3861 wattrset(view->win, A_NORMAL);
3862 waddstr(view->win, " ");
3863 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
3864 } while (commit->refs[i++]->next);
3865 }
3867 if (type != LINE_CURSOR)
3868 wattrset(view->win, get_line_attr(type));
3870 {
3871 int titlelen = strlen(commit->title);
3873 if (col + titlelen > view->width)
3874 titlelen = view->width - col;
3876 waddnstr(view->win, commit->title, titlelen);
3877 }
3879 return TRUE;
3880 }
3882 /* Reads git log --pretty=raw output and parses it into the commit struct. */
3883 static bool
3884 main_read(struct view *view, char *line)
3885 {
3886 static struct rev_graph *graph = graph_stacks;
3887 enum line_type type;
3888 struct commit *commit;
3890 if (!line) {
3891 update_rev_graph(graph);
3892 return TRUE;
3893 }
3895 type = get_line_type(line);
3896 if (type == LINE_COMMIT) {
3897 commit = calloc(1, sizeof(struct commit));
3898 if (!commit)
3899 return FALSE;
3901 string_copy_rev(commit->id, line + STRING_SIZE("commit "));
3902 commit->refs = get_refs(commit->id);
3903 graph->commit = commit;
3904 add_line_data(view, commit, LINE_MAIN_COMMIT);
3905 return TRUE;
3906 }
3908 if (!view->lines)
3909 return TRUE;
3910 commit = view->line[view->lines - 1].data;
3912 switch (type) {
3913 case LINE_PARENT:
3914 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
3915 break;
3917 case LINE_AUTHOR:
3918 {
3919 /* Parse author lines where the name may be empty:
3920 * author <email@address.tld> 1138474660 +0100
3921 */
3922 char *ident = line + STRING_SIZE("author ");
3923 char *nameend = strchr(ident, '<');
3924 char *emailend = strchr(ident, '>');
3926 if (!nameend || !emailend)
3927 break;
3929 update_rev_graph(graph);
3930 graph = graph->next;
3932 *nameend = *emailend = 0;
3933 ident = chomp_string(ident);
3934 if (!*ident) {
3935 ident = chomp_string(nameend + 1);
3936 if (!*ident)
3937 ident = "Unknown";
3938 }
3940 string_ncopy(commit->author, ident, strlen(ident));
3942 /* Parse epoch and timezone */
3943 if (emailend[1] == ' ') {
3944 char *secs = emailend + 2;
3945 char *zone = strchr(secs, ' ');
3946 time_t time = (time_t) atol(secs);
3948 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3949 long tz;
3951 zone++;
3952 tz = ('0' - zone[1]) * 60 * 60 * 10;
3953 tz += ('0' - zone[2]) * 60 * 60;
3954 tz += ('0' - zone[3]) * 60;
3955 tz += ('0' - zone[4]) * 60;
3957 if (zone[0] == '-')
3958 tz = -tz;
3960 time -= tz;
3961 }
3963 gmtime_r(&time, &commit->time);
3964 }
3965 break;
3966 }
3967 default:
3968 /* Fill in the commit title if it has not already been set. */
3969 if (commit->title[0])
3970 break;
3972 /* Require titles to start with a non-space character at the
3973 * offset used by git log. */
3974 if (strncmp(line, " ", 4))
3975 break;
3976 line += 4;
3977 /* Well, if the title starts with a whitespace character,
3978 * try to be forgiving. Otherwise we end up with no title. */
3979 while (isspace(*line))
3980 line++;
3981 if (*line == '\0')
3982 break;
3983 /* FIXME: More graceful handling of titles; append "..." to
3984 * shortened titles, etc. */
3986 string_ncopy(commit->title, line, strlen(line));
3987 }
3989 return TRUE;
3990 }
3992 static void
3993 cherry_pick_commit(struct commit *commit)
3994 {
3995 char cmd[SIZEOF_STR];
3996 char *cherry_pick = getenv("TIG_CHERRY_PICK");
3998 if (!cherry_pick)
3999 cherry_pick = "git cherry-pick";
4001 if (string_format(cmd, "%s %s", cherry_pick, commit->id)) {
4002 def_prog_mode(); /* save current tty modes */
4003 endwin(); /* restore original tty modes */
4004 system(cmd);
4005 fprintf(stderr, "Press Enter to continue");
4006 getc(stdin);
4007 reset_prog_mode();
4008 redraw_display();
4009 }
4010 }
4012 static enum request
4013 main_request(struct view *view, enum request request, struct line *line)
4014 {
4015 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4017 if (request == REQ_ENTER)
4018 open_view(view, REQ_VIEW_DIFF, flags);
4019 else if (request == REQ_CHERRY_PICK)
4020 cherry_pick_commit(line->data);
4021 else
4022 return request;
4024 return REQ_NONE;
4025 }
4027 static bool
4028 main_grep(struct view *view, struct line *line)
4029 {
4030 struct commit *commit = line->data;
4031 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
4032 char buf[DATE_COLS + 1];
4033 regmatch_t pmatch;
4035 for (state = S_TITLE; state < S_END; state++) {
4036 char *text;
4038 switch (state) {
4039 case S_TITLE: text = commit->title; break;
4040 case S_AUTHOR: text = commit->author; break;
4041 case S_DATE:
4042 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
4043 continue;
4044 text = buf;
4045 break;
4047 default:
4048 return FALSE;
4049 }
4051 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4052 return TRUE;
4053 }
4055 return FALSE;
4056 }
4058 static void
4059 main_select(struct view *view, struct line *line)
4060 {
4061 struct commit *commit = line->data;
4063 string_copy_rev(view->ref, commit->id);
4064 string_copy_rev(ref_commit, view->ref);
4065 }
4067 static struct view_ops main_ops = {
4068 "commit",
4069 NULL,
4070 main_read,
4071 main_draw,
4072 main_request,
4073 main_grep,
4074 main_select,
4075 };
4078 /*
4079 * Unicode / UTF-8 handling
4080 *
4081 * NOTE: Much of the following code for dealing with unicode is derived from
4082 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
4083 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
4084 */
4086 /* I've (over)annotated a lot of code snippets because I am not entirely
4087 * confident that the approach taken by this small UTF-8 interface is correct.
4088 * --jonas */
4090 static inline int
4091 unicode_width(unsigned long c)
4092 {
4093 if (c >= 0x1100 &&
4094 (c <= 0x115f /* Hangul Jamo */
4095 || c == 0x2329
4096 || c == 0x232a
4097 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
4098 /* CJK ... Yi */
4099 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
4100 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
4101 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
4102 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
4103 || (c >= 0xffe0 && c <= 0xffe6)
4104 || (c >= 0x20000 && c <= 0x2fffd)
4105 || (c >= 0x30000 && c <= 0x3fffd)))
4106 return 2;
4108 return 1;
4109 }
4111 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
4112 * Illegal bytes are set one. */
4113 static const unsigned char utf8_bytes[256] = {
4114 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,
4115 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,
4116 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,
4117 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,
4118 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,
4119 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,
4120 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,
4121 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,
4122 };
4124 /* Decode UTF-8 multi-byte representation into a unicode character. */
4125 static inline unsigned long
4126 utf8_to_unicode(const char *string, size_t length)
4127 {
4128 unsigned long unicode;
4130 switch (length) {
4131 case 1:
4132 unicode = string[0];
4133 break;
4134 case 2:
4135 unicode = (string[0] & 0x1f) << 6;
4136 unicode += (string[1] & 0x3f);
4137 break;
4138 case 3:
4139 unicode = (string[0] & 0x0f) << 12;
4140 unicode += ((string[1] & 0x3f) << 6);
4141 unicode += (string[2] & 0x3f);
4142 break;
4143 case 4:
4144 unicode = (string[0] & 0x0f) << 18;
4145 unicode += ((string[1] & 0x3f) << 12);
4146 unicode += ((string[2] & 0x3f) << 6);
4147 unicode += (string[3] & 0x3f);
4148 break;
4149 case 5:
4150 unicode = (string[0] & 0x0f) << 24;
4151 unicode += ((string[1] & 0x3f) << 18);
4152 unicode += ((string[2] & 0x3f) << 12);
4153 unicode += ((string[3] & 0x3f) << 6);
4154 unicode += (string[4] & 0x3f);
4155 break;
4156 case 6:
4157 unicode = (string[0] & 0x01) << 30;
4158 unicode += ((string[1] & 0x3f) << 24);
4159 unicode += ((string[2] & 0x3f) << 18);
4160 unicode += ((string[3] & 0x3f) << 12);
4161 unicode += ((string[4] & 0x3f) << 6);
4162 unicode += (string[5] & 0x3f);
4163 break;
4164 default:
4165 die("Invalid unicode length");
4166 }
4168 /* Invalid characters could return the special 0xfffd value but NUL
4169 * should be just as good. */
4170 return unicode > 0xffff ? 0 : unicode;
4171 }
4173 /* Calculates how much of string can be shown within the given maximum width
4174 * and sets trimmed parameter to non-zero value if all of string could not be
4175 * shown.
4176 *
4177 * Additionally, adds to coloffset how many many columns to move to align with
4178 * the expected position. Takes into account how multi-byte and double-width
4179 * characters will effect the cursor position.
4180 *
4181 * Returns the number of bytes to output from string to satisfy max_width. */
4182 static size_t
4183 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
4184 {
4185 const char *start = string;
4186 const char *end = strchr(string, '\0');
4187 size_t mbwidth = 0;
4188 size_t width = 0;
4190 *trimmed = 0;
4192 while (string < end) {
4193 int c = *(unsigned char *) string;
4194 unsigned char bytes = utf8_bytes[c];
4195 size_t ucwidth;
4196 unsigned long unicode;
4198 if (string + bytes > end)
4199 break;
4201 /* Change representation to figure out whether
4202 * it is a single- or double-width character. */
4204 unicode = utf8_to_unicode(string, bytes);
4205 /* FIXME: Graceful handling of invalid unicode character. */
4206 if (!unicode)
4207 break;
4209 ucwidth = unicode_width(unicode);
4210 width += ucwidth;
4211 if (width > max_width) {
4212 *trimmed = 1;
4213 break;
4214 }
4216 /* The column offset collects the differences between the
4217 * number of bytes encoding a character and the number of
4218 * columns will be used for rendering said character.
4219 *
4220 * So if some character A is encoded in 2 bytes, but will be
4221 * represented on the screen using only 1 byte this will and up
4222 * adding 1 to the multi-byte column offset.
4223 *
4224 * Assumes that no double-width character can be encoding in
4225 * less than two bytes. */
4226 if (bytes > ucwidth)
4227 mbwidth += bytes - ucwidth;
4229 string += bytes;
4230 }
4232 *coloffset += mbwidth;
4234 return string - start;
4235 }
4238 /*
4239 * Status management
4240 */
4242 /* Whether or not the curses interface has been initialized. */
4243 static bool cursed = FALSE;
4245 /* The status window is used for polling keystrokes. */
4246 static WINDOW *status_win;
4248 static bool status_empty = TRUE;
4250 /* Update status and title window. */
4251 static void
4252 report(const char *msg, ...)
4253 {
4254 struct view *view = display[current_view];
4256 if (input_mode)
4257 return;
4259 if (!status_empty || *msg) {
4260 va_list args;
4262 va_start(args, msg);
4264 wmove(status_win, 0, 0);
4265 if (*msg) {
4266 vwprintw(status_win, msg, args);
4267 status_empty = FALSE;
4268 } else {
4269 status_empty = TRUE;
4270 }
4271 wclrtoeol(status_win);
4272 wrefresh(status_win);
4274 va_end(args);
4275 }
4277 update_view_title(view);
4278 update_display_cursor(view);
4279 }
4281 /* Controls when nodelay should be in effect when polling user input. */
4282 static void
4283 set_nonblocking_input(bool loading)
4284 {
4285 static unsigned int loading_views;
4287 if ((loading == FALSE && loading_views-- == 1) ||
4288 (loading == TRUE && loading_views++ == 0))
4289 nodelay(status_win, loading);
4290 }
4292 static void
4293 init_display(void)
4294 {
4295 int x, y;
4297 /* Initialize the curses library */
4298 if (isatty(STDIN_FILENO)) {
4299 cursed = !!initscr();
4300 } else {
4301 /* Leave stdin and stdout alone when acting as a pager. */
4302 FILE *io = fopen("/dev/tty", "r+");
4304 if (!io)
4305 die("Failed to open /dev/tty");
4306 cursed = !!newterm(NULL, io, io);
4307 }
4309 if (!cursed)
4310 die("Failed to initialize curses");
4312 nonl(); /* Tell curses not to do NL->CR/NL on output */
4313 cbreak(); /* Take input chars one at a time, no wait for \n */
4314 noecho(); /* Don't echo input */
4315 leaveok(stdscr, TRUE);
4317 if (has_colors())
4318 init_colors();
4320 getmaxyx(stdscr, y, x);
4321 status_win = newwin(1, 0, y - 1, 0);
4322 if (!status_win)
4323 die("Failed to create status window");
4325 /* Enable keyboard mapping */
4326 keypad(status_win, TRUE);
4327 wbkgdset(status_win, get_line_attr(LINE_STATUS));
4328 }
4330 static char *
4331 read_prompt(const char *prompt)
4332 {
4333 enum { READING, STOP, CANCEL } status = READING;
4334 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
4335 int pos = 0;
4337 while (status == READING) {
4338 struct view *view;
4339 int i, key;
4341 input_mode = TRUE;
4343 foreach_view (view, i)
4344 update_view(view);
4346 input_mode = FALSE;
4348 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
4349 wclrtoeol(status_win);
4351 /* Refresh, accept single keystroke of input */
4352 key = wgetch(status_win);
4353 switch (key) {
4354 case KEY_RETURN:
4355 case KEY_ENTER:
4356 case '\n':
4357 status = pos ? STOP : CANCEL;
4358 break;
4360 case KEY_BACKSPACE:
4361 if (pos > 0)
4362 pos--;
4363 else
4364 status = CANCEL;
4365 break;
4367 case KEY_ESC:
4368 status = CANCEL;
4369 break;
4371 case ERR:
4372 break;
4374 default:
4375 if (pos >= sizeof(buf)) {
4376 report("Input string too long");
4377 return NULL;
4378 }
4380 if (isprint(key))
4381 buf[pos++] = (char) key;
4382 }
4383 }
4385 /* Clear the status window */
4386 status_empty = FALSE;
4387 report("");
4389 if (status == CANCEL)
4390 return NULL;
4392 buf[pos++] = 0;
4394 return buf;
4395 }
4397 /*
4398 * Repository references
4399 */
4401 static struct ref *refs;
4402 static size_t refs_size;
4404 /* Id <-> ref store */
4405 static struct ref ***id_refs;
4406 static size_t id_refs_size;
4408 static struct ref **
4409 get_refs(char *id)
4410 {
4411 struct ref ***tmp_id_refs;
4412 struct ref **ref_list = NULL;
4413 size_t ref_list_size = 0;
4414 size_t i;
4416 for (i = 0; i < id_refs_size; i++)
4417 if (!strcmp(id, id_refs[i][0]->id))
4418 return id_refs[i];
4420 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
4421 if (!tmp_id_refs)
4422 return NULL;
4424 id_refs = tmp_id_refs;
4426 for (i = 0; i < refs_size; i++) {
4427 struct ref **tmp;
4429 if (strcmp(id, refs[i].id))
4430 continue;
4432 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
4433 if (!tmp) {
4434 if (ref_list)
4435 free(ref_list);
4436 return NULL;
4437 }
4439 ref_list = tmp;
4440 if (ref_list_size > 0)
4441 ref_list[ref_list_size - 1]->next = 1;
4442 ref_list[ref_list_size] = &refs[i];
4444 /* XXX: The properties of the commit chains ensures that we can
4445 * safely modify the shared ref. The repo references will
4446 * always be similar for the same id. */
4447 ref_list[ref_list_size]->next = 0;
4448 ref_list_size++;
4449 }
4451 if (ref_list)
4452 id_refs[id_refs_size++] = ref_list;
4454 return ref_list;
4455 }
4457 static int
4458 read_ref(char *id, size_t idlen, char *name, size_t namelen)
4459 {
4460 struct ref *ref;
4461 bool tag = FALSE;
4462 bool remote = FALSE;
4464 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
4465 /* Commits referenced by tags has "^{}" appended. */
4466 if (name[namelen - 1] != '}')
4467 return OK;
4469 while (namelen > 0 && name[namelen] != '^')
4470 namelen--;
4472 tag = TRUE;
4473 namelen -= STRING_SIZE("refs/tags/");
4474 name += STRING_SIZE("refs/tags/");
4476 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
4477 remote = TRUE;
4478 namelen -= STRING_SIZE("refs/remotes/");
4479 name += STRING_SIZE("refs/remotes/");
4481 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
4482 namelen -= STRING_SIZE("refs/heads/");
4483 name += STRING_SIZE("refs/heads/");
4485 } else if (!strcmp(name, "HEAD")) {
4486 return OK;
4487 }
4489 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
4490 if (!refs)
4491 return ERR;
4493 ref = &refs[refs_size++];
4494 ref->name = malloc(namelen + 1);
4495 if (!ref->name)
4496 return ERR;
4498 strncpy(ref->name, name, namelen);
4499 ref->name[namelen] = 0;
4500 ref->tag = tag;
4501 ref->remote = remote;
4502 string_copy_rev(ref->id, id);
4504 return OK;
4505 }
4507 static int
4508 load_refs(void)
4509 {
4510 const char *cmd_env = getenv("TIG_LS_REMOTE");
4511 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
4513 return read_properties(popen(cmd, "r"), "\t", read_ref);
4514 }
4516 static int
4517 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
4518 {
4519 if (!strcmp(name, "i18n.commitencoding"))
4520 string_ncopy(opt_encoding, value, valuelen);
4522 if (!strcmp(name, "core.editor"))
4523 string_ncopy(opt_editor, value, valuelen);
4525 return OK;
4526 }
4528 static int
4529 load_repo_config(void)
4530 {
4531 return read_properties(popen(GIT_CONFIG " --list", "r"),
4532 "=", read_repo_config_option);
4533 }
4535 static int
4536 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
4537 {
4538 if (!opt_git_dir[0])
4539 string_ncopy(opt_git_dir, name, namelen);
4540 else
4541 string_ncopy(opt_cdup, name, namelen);
4542 return OK;
4543 }
4545 /* XXX: The line outputted by "--show-cdup" can be empty so the option
4546 * must be the last one! */
4547 static int
4548 load_repo_info(void)
4549 {
4550 return read_properties(popen("git rev-parse --git-dir --show-cdup 2>/dev/null", "r"),
4551 "=", read_repo_info);
4552 }
4554 static int
4555 read_properties(FILE *pipe, const char *separators,
4556 int (*read_property)(char *, size_t, char *, size_t))
4557 {
4558 char buffer[BUFSIZ];
4559 char *name;
4560 int state = OK;
4562 if (!pipe)
4563 return ERR;
4565 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4566 char *value;
4567 size_t namelen;
4568 size_t valuelen;
4570 name = chomp_string(name);
4571 namelen = strcspn(name, separators);
4573 if (name[namelen]) {
4574 name[namelen] = 0;
4575 value = chomp_string(name + namelen + 1);
4576 valuelen = strlen(value);
4578 } else {
4579 value = "";
4580 valuelen = 0;
4581 }
4583 state = read_property(name, namelen, value, valuelen);
4584 }
4586 if (state != ERR && ferror(pipe))
4587 state = ERR;
4589 pclose(pipe);
4591 return state;
4592 }
4595 /*
4596 * Main
4597 */
4599 static void __NORETURN
4600 quit(int sig)
4601 {
4602 /* XXX: Restore tty modes and let the OS cleanup the rest! */
4603 if (cursed)
4604 endwin();
4605 exit(0);
4606 }
4608 static void __NORETURN
4609 die(const char *err, ...)
4610 {
4611 va_list args;
4613 endwin();
4615 va_start(args, err);
4616 fputs("tig: ", stderr);
4617 vfprintf(stderr, err, args);
4618 fputs("\n", stderr);
4619 va_end(args);
4621 exit(1);
4622 }
4624 int
4625 main(int argc, char *argv[])
4626 {
4627 struct view *view;
4628 enum request request;
4629 size_t i;
4631 signal(SIGINT, quit);
4633 if (setlocale(LC_ALL, "")) {
4634 char *codeset = nl_langinfo(CODESET);
4636 string_ncopy(opt_codeset, codeset, strlen(codeset));
4637 }
4639 if (load_repo_info() == ERR)
4640 die("Failed to load repo info.");
4642 if (load_options() == ERR)
4643 die("Failed to load user config.");
4645 /* Load the repo config file so options can be overwritten from
4646 * the command line. */
4647 if (load_repo_config() == ERR)
4648 die("Failed to load repo config.");
4650 if (!parse_options(argc, argv))
4651 return 0;
4653 /* Require a git repository unless when running in pager mode. */
4654 if (!opt_git_dir[0])
4655 die("Not a git repository");
4657 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
4658 opt_iconv = iconv_open(opt_codeset, opt_encoding);
4659 if (opt_iconv == ICONV_NONE)
4660 die("Failed to initialize character set conversion");
4661 }
4663 if (load_refs() == ERR)
4664 die("Failed to load refs.");
4666 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
4667 view->cmd_env = getenv(view->cmd_env);
4669 request = opt_request;
4671 init_display();
4673 while (view_driver(display[current_view], request)) {
4674 int key;
4675 int i;
4677 foreach_view (view, i)
4678 update_view(view);
4680 /* Refresh, accept single keystroke of input */
4681 key = wgetch(status_win);
4683 /* wgetch() with nodelay() enabled returns ERR when there's no
4684 * input. */
4685 if (key == ERR) {
4686 request = REQ_NONE;
4687 continue;
4688 }
4690 request = get_keybinding(display[current_view]->keymap, key);
4692 /* Some low-level request handling. This keeps access to
4693 * status_win restricted. */
4694 switch (request) {
4695 case REQ_PROMPT:
4696 {
4697 char *cmd = read_prompt(":");
4699 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
4700 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
4701 opt_request = REQ_VIEW_DIFF;
4702 } else {
4703 opt_request = REQ_VIEW_PAGER;
4704 }
4705 break;
4706 }
4708 request = REQ_NONE;
4709 break;
4710 }
4711 case REQ_SEARCH:
4712 case REQ_SEARCH_BACK:
4713 {
4714 const char *prompt = request == REQ_SEARCH
4715 ? "/" : "?";
4716 char *search = read_prompt(prompt);
4718 if (search)
4719 string_ncopy(opt_search, search, strlen(search));
4720 else
4721 request = REQ_NONE;
4722 break;
4723 }
4724 case REQ_SCREEN_RESIZE:
4725 {
4726 int height, width;
4728 getmaxyx(stdscr, height, width);
4730 /* Resize the status view and let the view driver take
4731 * care of resizing the displayed views. */
4732 wresize(status_win, 1, width);
4733 mvwin(status_win, height - 1, 0);
4734 wrefresh(status_win);
4735 break;
4736 }
4737 default:
4738 break;
4739 }
4740 }
4742 quit(0);
4744 return 0;
4745 }