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Fix updating of the view title to show the current position in the view
[tig] / tig.c
1 /* Copyright (c) 2006 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 */
13
14 #ifndef VERSION
15 #define VERSION "unknown-version"
16 #endif
17
18 #ifndef DEBUG
19 #define NDEBUG
20 #endif
21
22 #include <assert.h>
23 #include <errno.h>
24 #include <ctype.h>
25 #include <signal.h>
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <unistd.h>
33 #include <time.h>
34
35 #include <regex.h>
36
37 #include <locale.h>
38 #include <langinfo.h>
39 #include <iconv.h>
40
41 #include <curses.h>
42
43 #if __GNUC__ >= 3
44 #define __NORETURN __attribute__((__noreturn__))
45 #else
46 #define __NORETURN
47 #endif
48
49 static void __NORETURN die(const char *err, ...);
50 static void report(const char *msg, ...);
51 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, size_t, char *, size_t));
52 static void set_nonblocking_input(bool loading);
53 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
54
55 #define ABS(x) ((x) >= 0 ? (x) : -(x))
56 #define MIN(x, y) ((x) < (y) ? (x) : (y))
57
58 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
59 #define STRING_SIZE(x) (sizeof(x) - 1)
60
61 #define SIZEOF_STR 1024 /* Default string size. */
62 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
63 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
64
65 /* Revision graph */
66
67 #define REVGRAPH_INIT 'I'
68 #define REVGRAPH_MERGE 'M'
69 #define REVGRAPH_BRANCH '+'
70 #define REVGRAPH_COMMIT '*'
71 #define REVGRAPH_LINE '|'
72
73 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
74
75 /* This color name can be used to refer to the default term colors. */
76 #define COLOR_DEFAULT (-1)
77
78 #define ICONV_NONE ((iconv_t) -1)
79
80 /* The format and size of the date column in the main view. */
81 #define DATE_FORMAT "%Y-%m-%d %H:%M"
82 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
83
84 #define AUTHOR_COLS 20
85
86 /* The default interval between line numbers. */
87 #define NUMBER_INTERVAL 1
88
89 #define TABSIZE 8
90
91 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
92
93 #define TIG_LS_REMOTE \
94 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
95
96 #define TIG_DIFF_CMD \
97 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
98
99 #define TIG_LOG_CMD \
100 "git log --cc --stat -n100 %s 2>/dev/null"
101
102 #define TIG_MAIN_CMD \
103 "git log --topo-order --pretty=raw %s 2>/dev/null"
104
105 #define TIG_TREE_CMD \
106 "git ls-tree %s %s"
107
108 #define TIG_BLOB_CMD \
109 "git cat-file blob %s"
110
111 /* XXX: Needs to be defined to the empty string. */
112 #define TIG_HELP_CMD ""
113 #define TIG_PAGER_CMD ""
114 #define TIG_STATUS_CMD ""
115
116 /* Some ascii-shorthands fitted into the ncurses namespace. */
117 #define KEY_TAB '\t'
118 #define KEY_RETURN '\r'
119 #define KEY_ESC 27
120
121
122 struct ref {
123 char *name; /* Ref name; tag or head names are shortened. */
124 char id[SIZEOF_REV]; /* Commit SHA1 ID */
125 unsigned int tag:1; /* Is it a tag? */
126 unsigned int remote:1; /* Is it a remote ref? */
127 unsigned int next:1; /* For ref lists: are there more refs? */
128 };
129
130 static struct ref **get_refs(char *id);
131
132 struct int_map {
133 const char *name;
134 int namelen;
135 int value;
136 };
137
138 static int
139 set_from_int_map(struct int_map *map, size_t map_size,
140 int *value, const char *name, int namelen)
141 {
142
143 int i;
144
145 for (i = 0; i < map_size; i++)
146 if (namelen == map[i].namelen &&
147 !strncasecmp(name, map[i].name, namelen)) {
148 *value = map[i].value;
149 return OK;
150 }
151
152 return ERR;
153 }
154
155
156 /*
157 * String helpers
158 */
159
160 static inline void
161 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
162 {
163 if (srclen > dstlen - 1)
164 srclen = dstlen - 1;
165
166 strncpy(dst, src, srclen);
167 dst[srclen] = 0;
168 }
169
170 /* Shorthands for safely copying into a fixed buffer. */
171
172 #define string_copy(dst, src) \
173 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
174
175 #define string_ncopy(dst, src, srclen) \
176 string_ncopy_do(dst, sizeof(dst), src, srclen)
177
178 #define string_copy_rev(dst, src) \
179 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
180
181 #define string_add(dst, from, src) \
182 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
183
184 static char *
185 chomp_string(char *name)
186 {
187 int namelen;
188
189 while (isspace(*name))
190 name++;
191
192 namelen = strlen(name) - 1;
193 while (namelen > 0 && isspace(name[namelen]))
194 name[namelen--] = 0;
195
196 return name;
197 }
198
199 static bool
200 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
201 {
202 va_list args;
203 size_t pos = bufpos ? *bufpos : 0;
204
205 va_start(args, fmt);
206 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
207 va_end(args);
208
209 if (bufpos)
210 *bufpos = pos;
211
212 return pos >= bufsize ? FALSE : TRUE;
213 }
214
215 #define string_format(buf, fmt, args...) \
216 string_nformat(buf, sizeof(buf), NULL, fmt, args)
217
218 #define string_format_from(buf, from, fmt, args...) \
219 string_nformat(buf, sizeof(buf), from, fmt, args)
220
221 static int
222 string_enum_compare(const char *str1, const char *str2, int len)
223 {
224 size_t i;
225
226 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
227
228 /* Diff-Header == DIFF_HEADER */
229 for (i = 0; i < len; i++) {
230 if (toupper(str1[i]) == toupper(str2[i]))
231 continue;
232
233 if (string_enum_sep(str1[i]) &&
234 string_enum_sep(str2[i]))
235 continue;
236
237 return str1[i] - str2[i];
238 }
239
240 return 0;
241 }
242
243 /* Shell quoting
244 *
245 * NOTE: The following is a slightly modified copy of the git project's shell
246 * quoting routines found in the quote.c file.
247 *
248 * Help to copy the thing properly quoted for the shell safety. any single
249 * quote is replaced with '\'', any exclamation point is replaced with '\!',
250 * and the whole thing is enclosed in a
251 *
252 * E.g.
253 * original sq_quote result
254 * name ==> name ==> 'name'
255 * a b ==> a b ==> 'a b'
256 * a'b ==> a'\''b ==> 'a'\''b'
257 * a!b ==> a'\!'b ==> 'a'\!'b'
258 */
259
260 static size_t
261 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
262 {
263 char c;
264
265 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
266
267 BUFPUT('\'');
268 while ((c = *src++)) {
269 if (c == '\'' || c == '!') {
270 BUFPUT('\'');
271 BUFPUT('\\');
272 BUFPUT(c);
273 BUFPUT('\'');
274 } else {
275 BUFPUT(c);
276 }
277 }
278 BUFPUT('\'');
279
280 if (bufsize < SIZEOF_STR)
281 buf[bufsize] = 0;
282
283 return bufsize;
284 }
285
286
287 /*
288 * User requests
289 */
290
291 #define REQ_INFO \
292 /* XXX: Keep the view request first and in sync with views[]. */ \
293 REQ_GROUP("View switching") \
294 REQ_(VIEW_MAIN, "Show main view"), \
295 REQ_(VIEW_DIFF, "Show diff view"), \
296 REQ_(VIEW_LOG, "Show log view"), \
297 REQ_(VIEW_TREE, "Show tree view"), \
298 REQ_(VIEW_BLOB, "Show blob view"), \
299 REQ_(VIEW_HELP, "Show help page"), \
300 REQ_(VIEW_PAGER, "Show pager view"), \
301 REQ_(VIEW_STATUS, "Show status view"), \
302 \
303 REQ_GROUP("View manipulation") \
304 REQ_(ENTER, "Enter current line and scroll"), \
305 REQ_(NEXT, "Move to next"), \
306 REQ_(PREVIOUS, "Move to previous"), \
307 REQ_(VIEW_NEXT, "Move focus to next view"), \
308 REQ_(VIEW_CLOSE, "Close the current view"), \
309 REQ_(QUIT, "Close all views and quit"), \
310 \
311 REQ_GROUP("Cursor navigation") \
312 REQ_(MOVE_UP, "Move cursor one line up"), \
313 REQ_(MOVE_DOWN, "Move cursor one line down"), \
314 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
315 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
316 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
317 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
318 \
319 REQ_GROUP("Scrolling") \
320 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
321 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
322 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
323 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
324 \
325 REQ_GROUP("Searching") \
326 REQ_(SEARCH, "Search the view"), \
327 REQ_(SEARCH_BACK, "Search backwards in the view"), \
328 REQ_(FIND_NEXT, "Find next search match"), \
329 REQ_(FIND_PREV, "Find previous search match"), \
330 \
331 REQ_GROUP("Misc") \
332 REQ_(NONE, "Do nothing"), \
333 REQ_(PROMPT, "Bring up the prompt"), \
334 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
335 REQ_(SCREEN_RESIZE, "Resize the screen"), \
336 REQ_(SHOW_VERSION, "Show version information"), \
337 REQ_(STOP_LOADING, "Stop all loading views"), \
338 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
339 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
340 REQ_(STATUS_UPDATE, "Update file status"), \
341 REQ_(EDIT, "Open in editor")
342
343
344 /* User action requests. */
345 enum request {
346 #define REQ_GROUP(help)
347 #define REQ_(req, help) REQ_##req
348
349 /* Offset all requests to avoid conflicts with ncurses getch values. */
350 REQ_OFFSET = KEY_MAX + 1,
351 REQ_INFO,
352 REQ_UNKNOWN,
353
354 #undef REQ_GROUP
355 #undef REQ_
356 };
357
358 struct request_info {
359 enum request request;
360 char *name;
361 int namelen;
362 char *help;
363 };
364
365 static struct request_info req_info[] = {
366 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
367 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
368 REQ_INFO
369 #undef REQ_GROUP
370 #undef REQ_
371 };
372
373 static enum request
374 get_request(const char *name)
375 {
376 int namelen = strlen(name);
377 int i;
378
379 for (i = 0; i < ARRAY_SIZE(req_info); i++)
380 if (req_info[i].namelen == namelen &&
381 !string_enum_compare(req_info[i].name, name, namelen))
382 return req_info[i].request;
383
384 return REQ_UNKNOWN;
385 }
386
387
388 /*
389 * Options
390 */
391
392 static const char usage[] =
393 "tig " VERSION " (" __DATE__ ")\n"
394 "\n"
395 "Usage: tig [options]\n"
396 " or: tig [options] [--] [git log options]\n"
397 " or: tig [options] log [git log options]\n"
398 " or: tig [options] diff [git diff options]\n"
399 " or: tig [options] show [git show options]\n"
400 " or: tig [options] < [git command output]\n"
401 "\n"
402 "Options:\n"
403 " -l Start up in log view\n"
404 " -d Start up in diff view\n"
405 " -S Start up in status view\n"
406 " -n[I], --line-number[=I] Show line numbers with given interval\n"
407 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
408 " -- Mark end of tig options\n"
409 " -v, --version Show version and exit\n"
410 " -h, --help Show help message and exit\n";
411
412 /* Option and state variables. */
413 static bool opt_line_number = FALSE;
414 static bool opt_rev_graph = FALSE;
415 static int opt_num_interval = NUMBER_INTERVAL;
416 static int opt_tab_size = TABSIZE;
417 static enum request opt_request = REQ_VIEW_MAIN;
418 static char opt_cmd[SIZEOF_STR] = "";
419 static char opt_path[SIZEOF_STR] = "";
420 static FILE *opt_pipe = NULL;
421 static char opt_encoding[20] = "UTF-8";
422 static bool opt_utf8 = TRUE;
423 static char opt_codeset[20] = "UTF-8";
424 static iconv_t opt_iconv = ICONV_NONE;
425 static char opt_search[SIZEOF_STR] = "";
426 static char opt_cdup[SIZEOF_STR] = "";
427 static char opt_git_dir[SIZEOF_STR] = "";
428 static char opt_editor[SIZEOF_STR] = "";
429
430 enum option_type {
431 OPT_NONE,
432 OPT_INT,
433 };
434
435 static bool
436 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
437 {
438 va_list args;
439 char *value = "";
440 int *number;
441
442 if (opt[0] != '-')
443 return FALSE;
444
445 if (opt[1] == '-') {
446 int namelen = strlen(name);
447
448 opt += 2;
449
450 if (strncmp(opt, name, namelen))
451 return FALSE;
452
453 if (opt[namelen] == '=')
454 value = opt + namelen + 1;
455
456 } else {
457 if (!short_name || opt[1] != short_name)
458 return FALSE;
459 value = opt + 2;
460 }
461
462 va_start(args, type);
463 if (type == OPT_INT) {
464 number = va_arg(args, int *);
465 if (isdigit(*value))
466 *number = atoi(value);
467 }
468 va_end(args);
469
470 return TRUE;
471 }
472
473 /* Returns the index of log or diff command or -1 to exit. */
474 static bool
475 parse_options(int argc, char *argv[])
476 {
477 int i;
478
479 for (i = 1; i < argc; i++) {
480 char *opt = argv[i];
481
482 if (!strcmp(opt, "log") ||
483 !strcmp(opt, "diff") ||
484 !strcmp(opt, "show")) {
485 opt_request = opt[0] == 'l'
486 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
487 break;
488 }
489
490 if (opt[0] && opt[0] != '-')
491 break;
492
493 if (!strcmp(opt, "-l")) {
494 opt_request = REQ_VIEW_LOG;
495 continue;
496 }
497
498 if (!strcmp(opt, "-d")) {
499 opt_request = REQ_VIEW_DIFF;
500 continue;
501 }
502
503 if (!strcmp(opt, "-S")) {
504 opt_request = REQ_VIEW_STATUS;
505 continue;
506 }
507
508 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
509 opt_line_number = TRUE;
510 continue;
511 }
512
513 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
514 opt_tab_size = MIN(opt_tab_size, TABSIZE);
515 continue;
516 }
517
518 if (check_option(opt, 'v', "version", OPT_NONE)) {
519 printf("tig version %s\n", VERSION);
520 return FALSE;
521 }
522
523 if (check_option(opt, 'h', "help", OPT_NONE)) {
524 printf(usage);
525 return FALSE;
526 }
527
528 if (!strcmp(opt, "--")) {
529 i++;
530 break;
531 }
532
533 die("unknown option '%s'\n\n%s", opt, usage);
534 }
535
536 if (!isatty(STDIN_FILENO)) {
537 opt_request = REQ_VIEW_PAGER;
538 opt_pipe = stdin;
539
540 } else if (i < argc) {
541 size_t buf_size;
542
543 if (opt_request == REQ_VIEW_MAIN)
544 /* XXX: This is vulnerable to the user overriding
545 * options required for the main view parser. */
546 string_copy(opt_cmd, "git log --pretty=raw");
547 else
548 string_copy(opt_cmd, "git");
549 buf_size = strlen(opt_cmd);
550
551 while (buf_size < sizeof(opt_cmd) && i < argc) {
552 opt_cmd[buf_size++] = ' ';
553 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
554 }
555
556 if (buf_size >= sizeof(opt_cmd))
557 die("command too long");
558
559 opt_cmd[buf_size] = 0;
560 }
561
562 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
563 opt_utf8 = FALSE;
564
565 return TRUE;
566 }
567
568
569 /*
570 * Line-oriented content detection.
571 */
572
573 #define LINE_INFO \
574 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
575 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
576 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
577 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
578 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
579 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
580 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
581 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
582 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
583 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
584 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
585 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
586 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
587 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
588 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
589 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
590 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
591 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
592 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
593 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
594 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
595 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
596 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
597 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
598 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
599 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
600 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
601 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
602 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
603 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
604 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
605 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
606 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
607 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
608 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
609 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
610 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
611 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
612 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
613 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
614 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
615 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
616 LINE(STAT_SECTION, "", COLOR_DEFAULT, COLOR_BLUE, A_BOLD), \
617 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
618 LINE(STAT_STAGED, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
619 LINE(STAT_UNSTAGED,"", COLOR_YELLOW, COLOR_DEFAULT, 0), \
620 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0)
621
622 enum line_type {
623 #define LINE(type, line, fg, bg, attr) \
624 LINE_##type
625 LINE_INFO
626 #undef LINE
627 };
628
629 struct line_info {
630 const char *name; /* Option name. */
631 int namelen; /* Size of option name. */
632 const char *line; /* The start of line to match. */
633 int linelen; /* Size of string to match. */
634 int fg, bg, attr; /* Color and text attributes for the lines. */
635 };
636
637 static struct line_info line_info[] = {
638 #define LINE(type, line, fg, bg, attr) \
639 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
640 LINE_INFO
641 #undef LINE
642 };
643
644 static enum line_type
645 get_line_type(char *line)
646 {
647 int linelen = strlen(line);
648 enum line_type type;
649
650 for (type = 0; type < ARRAY_SIZE(line_info); type++)
651 /* Case insensitive search matches Signed-off-by lines better. */
652 if (linelen >= line_info[type].linelen &&
653 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
654 return type;
655
656 return LINE_DEFAULT;
657 }
658
659 static inline int
660 get_line_attr(enum line_type type)
661 {
662 assert(type < ARRAY_SIZE(line_info));
663 return COLOR_PAIR(type) | line_info[type].attr;
664 }
665
666 static struct line_info *
667 get_line_info(char *name, int namelen)
668 {
669 enum line_type type;
670
671 for (type = 0; type < ARRAY_SIZE(line_info); type++)
672 if (namelen == line_info[type].namelen &&
673 !string_enum_compare(line_info[type].name, name, namelen))
674 return &line_info[type];
675
676 return NULL;
677 }
678
679 static void
680 init_colors(void)
681 {
682 int default_bg = COLOR_BLACK;
683 int default_fg = COLOR_WHITE;
684 enum line_type type;
685
686 start_color();
687
688 if (use_default_colors() != ERR) {
689 default_bg = -1;
690 default_fg = -1;
691 }
692
693 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
694 struct line_info *info = &line_info[type];
695 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
696 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
697
698 init_pair(type, fg, bg);
699 }
700 }
701
702 struct line {
703 enum line_type type;
704
705 /* State flags */
706 unsigned int selected:1;
707
708 void *data; /* User data */
709 };
710
711
712 /*
713 * Keys
714 */
715
716 struct keybinding {
717 int alias;
718 enum request request;
719 struct keybinding *next;
720 };
721
722 static struct keybinding default_keybindings[] = {
723 /* View switching */
724 { 'm', REQ_VIEW_MAIN },
725 { 'd', REQ_VIEW_DIFF },
726 { 'l', REQ_VIEW_LOG },
727 { 't', REQ_VIEW_TREE },
728 { 'f', REQ_VIEW_BLOB },
729 { 'p', REQ_VIEW_PAGER },
730 { 'h', REQ_VIEW_HELP },
731 { 'S', REQ_VIEW_STATUS },
732
733 /* View manipulation */
734 { 'q', REQ_VIEW_CLOSE },
735 { KEY_TAB, REQ_VIEW_NEXT },
736 { KEY_RETURN, REQ_ENTER },
737 { KEY_UP, REQ_PREVIOUS },
738 { KEY_DOWN, REQ_NEXT },
739
740 /* Cursor navigation */
741 { 'k', REQ_MOVE_UP },
742 { 'j', REQ_MOVE_DOWN },
743 { KEY_HOME, REQ_MOVE_FIRST_LINE },
744 { KEY_END, REQ_MOVE_LAST_LINE },
745 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
746 { ' ', REQ_MOVE_PAGE_DOWN },
747 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
748 { 'b', REQ_MOVE_PAGE_UP },
749 { '-', REQ_MOVE_PAGE_UP },
750
751 /* Scrolling */
752 { KEY_IC, REQ_SCROLL_LINE_UP },
753 { KEY_DC, REQ_SCROLL_LINE_DOWN },
754 { 'w', REQ_SCROLL_PAGE_UP },
755 { 's', REQ_SCROLL_PAGE_DOWN },
756
757 /* Searching */
758 { '/', REQ_SEARCH },
759 { '?', REQ_SEARCH_BACK },
760 { 'n', REQ_FIND_NEXT },
761 { 'N', REQ_FIND_PREV },
762
763 /* Misc */
764 { 'Q', REQ_QUIT },
765 { 'z', REQ_STOP_LOADING },
766 { 'v', REQ_SHOW_VERSION },
767 { 'r', REQ_SCREEN_REDRAW },
768 { '.', REQ_TOGGLE_LINENO },
769 { 'g', REQ_TOGGLE_REV_GRAPH },
770 { ':', REQ_PROMPT },
771 { 'u', REQ_STATUS_UPDATE },
772 { 'e', REQ_EDIT },
773
774 /* Using the ncurses SIGWINCH handler. */
775 { KEY_RESIZE, REQ_SCREEN_RESIZE },
776 };
777
778 #define KEYMAP_INFO \
779 KEYMAP_(GENERIC), \
780 KEYMAP_(MAIN), \
781 KEYMAP_(DIFF), \
782 KEYMAP_(LOG), \
783 KEYMAP_(TREE), \
784 KEYMAP_(BLOB), \
785 KEYMAP_(PAGER), \
786 KEYMAP_(HELP), \
787 KEYMAP_(STATUS)
788
789 enum keymap {
790 #define KEYMAP_(name) KEYMAP_##name
791 KEYMAP_INFO
792 #undef KEYMAP_
793 };
794
795 static struct int_map keymap_table[] = {
796 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
797 KEYMAP_INFO
798 #undef KEYMAP_
799 };
800
801 #define set_keymap(map, name) \
802 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
803
804 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
805
806 static void
807 add_keybinding(enum keymap keymap, enum request request, int key)
808 {
809 struct keybinding *keybinding;
810
811 keybinding = calloc(1, sizeof(*keybinding));
812 if (!keybinding)
813 die("Failed to allocate keybinding");
814
815 keybinding->alias = key;
816 keybinding->request = request;
817 keybinding->next = keybindings[keymap];
818 keybindings[keymap] = keybinding;
819 }
820
821 /* Looks for a key binding first in the given map, then in the generic map, and
822 * lastly in the default keybindings. */
823 static enum request
824 get_keybinding(enum keymap keymap, int key)
825 {
826 struct keybinding *kbd;
827 int i;
828
829 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
830 if (kbd->alias == key)
831 return kbd->request;
832
833 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
834 if (kbd->alias == key)
835 return kbd->request;
836
837 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
838 if (default_keybindings[i].alias == key)
839 return default_keybindings[i].request;
840
841 return (enum request) key;
842 }
843
844
845 struct key {
846 char *name;
847 int value;
848 };
849
850 static struct key key_table[] = {
851 { "Enter", KEY_RETURN },
852 { "Space", ' ' },
853 { "Backspace", KEY_BACKSPACE },
854 { "Tab", KEY_TAB },
855 { "Escape", KEY_ESC },
856 { "Left", KEY_LEFT },
857 { "Right", KEY_RIGHT },
858 { "Up", KEY_UP },
859 { "Down", KEY_DOWN },
860 { "Insert", KEY_IC },
861 { "Delete", KEY_DC },
862 { "Hash", '#' },
863 { "Home", KEY_HOME },
864 { "End", KEY_END },
865 { "PageUp", KEY_PPAGE },
866 { "PageDown", KEY_NPAGE },
867 { "F1", KEY_F(1) },
868 { "F2", KEY_F(2) },
869 { "F3", KEY_F(3) },
870 { "F4", KEY_F(4) },
871 { "F5", KEY_F(5) },
872 { "F6", KEY_F(6) },
873 { "F7", KEY_F(7) },
874 { "F8", KEY_F(8) },
875 { "F9", KEY_F(9) },
876 { "F10", KEY_F(10) },
877 { "F11", KEY_F(11) },
878 { "F12", KEY_F(12) },
879 };
880
881 static int
882 get_key_value(const char *name)
883 {
884 int i;
885
886 for (i = 0; i < ARRAY_SIZE(key_table); i++)
887 if (!strcasecmp(key_table[i].name, name))
888 return key_table[i].value;
889
890 if (strlen(name) == 1 && isprint(*name))
891 return (int) *name;
892
893 return ERR;
894 }
895
896 static char *
897 get_key(enum request request)
898 {
899 static char buf[BUFSIZ];
900 static char key_char[] = "'X'";
901 size_t pos = 0;
902 char *sep = "";
903 int i;
904
905 buf[pos] = 0;
906
907 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
908 struct keybinding *keybinding = &default_keybindings[i];
909 char *seq = NULL;
910 int key;
911
912 if (keybinding->request != request)
913 continue;
914
915 for (key = 0; key < ARRAY_SIZE(key_table); key++)
916 if (key_table[key].value == keybinding->alias)
917 seq = key_table[key].name;
918
919 if (seq == NULL &&
920 keybinding->alias < 127 &&
921 isprint(keybinding->alias)) {
922 key_char[1] = (char) keybinding->alias;
923 seq = key_char;
924 }
925
926 if (!seq)
927 seq = "'?'";
928
929 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
930 return "Too many keybindings!";
931 sep = ", ";
932 }
933
934 return buf;
935 }
936
937
938 /*
939 * User config file handling.
940 */
941
942 static struct int_map color_map[] = {
943 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
944 COLOR_MAP(DEFAULT),
945 COLOR_MAP(BLACK),
946 COLOR_MAP(BLUE),
947 COLOR_MAP(CYAN),
948 COLOR_MAP(GREEN),
949 COLOR_MAP(MAGENTA),
950 COLOR_MAP(RED),
951 COLOR_MAP(WHITE),
952 COLOR_MAP(YELLOW),
953 };
954
955 #define set_color(color, name) \
956 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
957
958 static struct int_map attr_map[] = {
959 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
960 ATTR_MAP(NORMAL),
961 ATTR_MAP(BLINK),
962 ATTR_MAP(BOLD),
963 ATTR_MAP(DIM),
964 ATTR_MAP(REVERSE),
965 ATTR_MAP(STANDOUT),
966 ATTR_MAP(UNDERLINE),
967 };
968
969 #define set_attribute(attr, name) \
970 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
971
972 static int config_lineno;
973 static bool config_errors;
974 static char *config_msg;
975
976 /* Wants: object fgcolor bgcolor [attr] */
977 static int
978 option_color_command(int argc, char *argv[])
979 {
980 struct line_info *info;
981
982 if (argc != 3 && argc != 4) {
983 config_msg = "Wrong number of arguments given to color command";
984 return ERR;
985 }
986
987 info = get_line_info(argv[0], strlen(argv[0]));
988 if (!info) {
989 config_msg = "Unknown color name";
990 return ERR;
991 }
992
993 if (set_color(&info->fg, argv[1]) == ERR ||
994 set_color(&info->bg, argv[2]) == ERR) {
995 config_msg = "Unknown color";
996 return ERR;
997 }
998
999 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1000 config_msg = "Unknown attribute";
1001 return ERR;
1002 }
1003
1004 return OK;
1005 }
1006
1007 /* Wants: name = value */
1008 static int
1009 option_set_command(int argc, char *argv[])
1010 {
1011 if (argc != 3) {
1012 config_msg = "Wrong number of arguments given to set command";
1013 return ERR;
1014 }
1015
1016 if (strcmp(argv[1], "=")) {
1017 config_msg = "No value assigned";
1018 return ERR;
1019 }
1020
1021 if (!strcmp(argv[0], "show-rev-graph")) {
1022 opt_rev_graph = (!strcmp(argv[2], "1") ||
1023 !strcmp(argv[2], "true") ||
1024 !strcmp(argv[2], "yes"));
1025 return OK;
1026 }
1027
1028 if (!strcmp(argv[0], "line-number-interval")) {
1029 opt_num_interval = atoi(argv[2]);
1030 return OK;
1031 }
1032
1033 if (!strcmp(argv[0], "tab-size")) {
1034 opt_tab_size = atoi(argv[2]);
1035 return OK;
1036 }
1037
1038 if (!strcmp(argv[0], "commit-encoding")) {
1039 char *arg = argv[2];
1040 int delimiter = *arg;
1041 int i;
1042
1043 switch (delimiter) {
1044 case '"':
1045 case '\'':
1046 for (arg++, i = 0; arg[i]; i++)
1047 if (arg[i] == delimiter) {
1048 arg[i] = 0;
1049 break;
1050 }
1051 default:
1052 string_ncopy(opt_encoding, arg, strlen(arg));
1053 return OK;
1054 }
1055 }
1056
1057 config_msg = "Unknown variable name";
1058 return ERR;
1059 }
1060
1061 /* Wants: mode request key */
1062 static int
1063 option_bind_command(int argc, char *argv[])
1064 {
1065 enum request request;
1066 int keymap;
1067 int key;
1068
1069 if (argc != 3) {
1070 config_msg = "Wrong number of arguments given to bind command";
1071 return ERR;
1072 }
1073
1074 if (set_keymap(&keymap, argv[0]) == ERR) {
1075 config_msg = "Unknown key map";
1076 return ERR;
1077 }
1078
1079 key = get_key_value(argv[1]);
1080 if (key == ERR) {
1081 config_msg = "Unknown key";
1082 return ERR;
1083 }
1084
1085 request = get_request(argv[2]);
1086 if (request == REQ_UNKNOWN) {
1087 config_msg = "Unknown request name";
1088 return ERR;
1089 }
1090
1091 add_keybinding(keymap, request, key);
1092
1093 return OK;
1094 }
1095
1096 static int
1097 set_option(char *opt, char *value)
1098 {
1099 char *argv[16];
1100 int valuelen;
1101 int argc = 0;
1102
1103 /* Tokenize */
1104 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1105 argv[argc++] = value;
1106
1107 value += valuelen;
1108 if (!*value)
1109 break;
1110
1111 *value++ = 0;
1112 while (isspace(*value))
1113 value++;
1114 }
1115
1116 if (!strcmp(opt, "color"))
1117 return option_color_command(argc, argv);
1118
1119 if (!strcmp(opt, "set"))
1120 return option_set_command(argc, argv);
1121
1122 if (!strcmp(opt, "bind"))
1123 return option_bind_command(argc, argv);
1124
1125 config_msg = "Unknown option command";
1126 return ERR;
1127 }
1128
1129 static int
1130 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1131 {
1132 int status = OK;
1133
1134 config_lineno++;
1135 config_msg = "Internal error";
1136
1137 /* Check for comment markers, since read_properties() will
1138 * only ensure opt and value are split at first " \t". */
1139 optlen = strcspn(opt, "#");
1140 if (optlen == 0)
1141 return OK;
1142
1143 if (opt[optlen] != 0) {
1144 config_msg = "No option value";
1145 status = ERR;
1146
1147 } else {
1148 /* Look for comment endings in the value. */
1149 size_t len = strcspn(value, "#");
1150
1151 if (len < valuelen) {
1152 valuelen = len;
1153 value[valuelen] = 0;
1154 }
1155
1156 status = set_option(opt, value);
1157 }
1158
1159 if (status == ERR) {
1160 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1161 config_lineno, (int) optlen, opt, config_msg);
1162 config_errors = TRUE;
1163 }
1164
1165 /* Always keep going if errors are encountered. */
1166 return OK;
1167 }
1168
1169 static int
1170 load_options(void)
1171 {
1172 char *home = getenv("HOME");
1173 char buf[SIZEOF_STR];
1174 FILE *file;
1175
1176 config_lineno = 0;
1177 config_errors = FALSE;
1178
1179 if (!home || !string_format(buf, "%s/.tigrc", home))
1180 return ERR;
1181
1182 /* It's ok that the file doesn't exist. */
1183 file = fopen(buf, "r");
1184 if (!file)
1185 return OK;
1186
1187 if (read_properties(file, " \t", read_option) == ERR ||
1188 config_errors == TRUE)
1189 fprintf(stderr, "Errors while loading %s.\n", buf);
1190
1191 return OK;
1192 }
1193
1194
1195 /*
1196 * The viewer
1197 */
1198
1199 struct view;
1200 struct view_ops;
1201
1202 /* The display array of active views and the index of the current view. */
1203 static struct view *display[2];
1204 static unsigned int current_view;
1205
1206 /* Reading from the prompt? */
1207 static bool input_mode = FALSE;
1208
1209 #define foreach_displayed_view(view, i) \
1210 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1211
1212 #define displayed_views() (display[1] != NULL ? 2 : 1)
1213
1214 /* Current head and commit ID */
1215 static char ref_blob[SIZEOF_REF] = "";
1216 static char ref_commit[SIZEOF_REF] = "HEAD";
1217 static char ref_head[SIZEOF_REF] = "HEAD";
1218
1219 struct view {
1220 const char *name; /* View name */
1221 const char *cmd_fmt; /* Default command line format */
1222 const char *cmd_env; /* Command line set via environment */
1223 const char *id; /* Points to either of ref_{head,commit,blob} */
1224
1225 struct view_ops *ops; /* View operations */
1226
1227 enum keymap keymap; /* What keymap does this view have */
1228
1229 char cmd[SIZEOF_STR]; /* Command buffer */
1230 char ref[SIZEOF_REF]; /* Hovered commit reference */
1231 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1232
1233 int height, width; /* The width and height of the main window */
1234 WINDOW *win; /* The main window */
1235 WINDOW *title; /* The title window living below the main window */
1236
1237 /* Navigation */
1238 unsigned long offset; /* Offset of the window top */
1239 unsigned long lineno; /* Current line number */
1240
1241 /* Searching */
1242 char grep[SIZEOF_STR]; /* Search string */
1243 regex_t *regex; /* Pre-compiled regex */
1244
1245 /* If non-NULL, points to the view that opened this view. If this view
1246 * is closed tig will switch back to the parent view. */
1247 struct view *parent;
1248
1249 /* Buffering */
1250 unsigned long lines; /* Total number of lines */
1251 struct line *line; /* Line index */
1252 unsigned long line_size;/* Total number of allocated lines */
1253 unsigned int digits; /* Number of digits in the lines member. */
1254
1255 /* Loading */
1256 FILE *pipe;
1257 time_t start_time;
1258 };
1259
1260 struct view_ops {
1261 /* What type of content being displayed. Used in the title bar. */
1262 const char *type;
1263 /* Open and reads in all view content. */
1264 bool (*open)(struct view *view);
1265 /* Read one line; updates view->line. */
1266 bool (*read)(struct view *view, char *data);
1267 /* Draw one line; @lineno must be < view->height. */
1268 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1269 /* Depending on view handle a special requests. */
1270 enum request (*request)(struct view *view, enum request request, struct line *line);
1271 /* Search for regex in a line. */
1272 bool (*grep)(struct view *view, struct line *line);
1273 /* Select line */
1274 void (*select)(struct view *view, struct line *line);
1275 };
1276
1277 static struct view_ops pager_ops;
1278 static struct view_ops main_ops;
1279 static struct view_ops tree_ops;
1280 static struct view_ops blob_ops;
1281 static struct view_ops help_ops;
1282 static struct view_ops status_ops;
1283
1284 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1285 { name, cmd, #env, ref, ops, map}
1286
1287 #define VIEW_(id, name, ops, ref) \
1288 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1289
1290
1291 static struct view views[] = {
1292 VIEW_(MAIN, "main", &main_ops, ref_head),
1293 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1294 VIEW_(LOG, "log", &pager_ops, ref_head),
1295 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1296 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1297 VIEW_(HELP, "help", &help_ops, ""),
1298 VIEW_(PAGER, "pager", &pager_ops, "stdin"),
1299 VIEW_(STATUS, "status", &status_ops, ""),
1300 };
1301
1302 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1303
1304 #define foreach_view(view, i) \
1305 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1306
1307 #define view_is_displayed(view) \
1308 (view == display[0] || view == display[1])
1309
1310 static bool
1311 draw_view_line(struct view *view, unsigned int lineno)
1312 {
1313 struct line *line;
1314 bool selected = (view->offset + lineno == view->lineno);
1315 bool draw_ok;
1316
1317 assert(view_is_displayed(view));
1318
1319 if (view->offset + lineno >= view->lines)
1320 return FALSE;
1321
1322 line = &view->line[view->offset + lineno];
1323
1324 if (selected) {
1325 line->selected = TRUE;
1326 view->ops->select(view, line);
1327 } else if (line->selected) {
1328 line->selected = FALSE;
1329 wmove(view->win, lineno, 0);
1330 wclrtoeol(view->win);
1331 }
1332
1333 scrollok(view->win, FALSE);
1334 draw_ok = view->ops->draw(view, line, lineno, selected);
1335 scrollok(view->win, TRUE);
1336
1337 return draw_ok;
1338 }
1339
1340 static void
1341 redraw_view_from(struct view *view, int lineno)
1342 {
1343 assert(0 <= lineno && lineno < view->height);
1344
1345 for (; lineno < view->height; lineno++) {
1346 if (!draw_view_line(view, lineno))
1347 break;
1348 }
1349
1350 redrawwin(view->win);
1351 if (input_mode)
1352 wnoutrefresh(view->win);
1353 else
1354 wrefresh(view->win);
1355 }
1356
1357 static void
1358 redraw_view(struct view *view)
1359 {
1360 wclear(view->win);
1361 redraw_view_from(view, 0);
1362 }
1363
1364
1365 static void
1366 update_view_title(struct view *view)
1367 {
1368 char buf[SIZEOF_STR];
1369 char state[SIZEOF_STR];
1370 size_t bufpos = 0, statelen = 0;
1371
1372 assert(view_is_displayed(view));
1373
1374 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1375 unsigned int view_lines = view->offset + view->height;
1376 unsigned int lines = view->lines
1377 ? MIN(view_lines, view->lines) * 100 / view->lines
1378 : 0;
1379
1380 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1381 view->ops->type,
1382 view->lineno + 1,
1383 view->lines,
1384 lines);
1385
1386 if (view->pipe) {
1387 time_t secs = time(NULL) - view->start_time;
1388
1389 /* Three git seconds are a long time ... */
1390 if (secs > 2)
1391 string_format_from(state, &statelen, " %lds", secs);
1392 }
1393 }
1394
1395 string_format_from(buf, &bufpos, "[%s]", view->name);
1396 if (*view->ref && bufpos < view->width) {
1397 size_t refsize = strlen(view->ref);
1398 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1399
1400 if (minsize < view->width)
1401 refsize = view->width - minsize + 7;
1402 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1403 }
1404
1405 if (statelen && bufpos < view->width) {
1406 string_format_from(buf, &bufpos, " %s", state);
1407 }
1408
1409 if (view == display[current_view])
1410 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1411 else
1412 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1413
1414 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1415 wclrtoeol(view->title);
1416 wmove(view->title, 0, view->width - 1);
1417
1418 if (input_mode)
1419 wnoutrefresh(view->title);
1420 else
1421 wrefresh(view->title);
1422 }
1423
1424 static void
1425 resize_display(void)
1426 {
1427 int offset, i;
1428 struct view *base = display[0];
1429 struct view *view = display[1] ? display[1] : display[0];
1430
1431 /* Setup window dimensions */
1432
1433 getmaxyx(stdscr, base->height, base->width);
1434
1435 /* Make room for the status window. */
1436 base->height -= 1;
1437
1438 if (view != base) {
1439 /* Horizontal split. */
1440 view->width = base->width;
1441 view->height = SCALE_SPLIT_VIEW(base->height);
1442 base->height -= view->height;
1443
1444 /* Make room for the title bar. */
1445 view->height -= 1;
1446 }
1447
1448 /* Make room for the title bar. */
1449 base->height -= 1;
1450
1451 offset = 0;
1452
1453 foreach_displayed_view (view, i) {
1454 if (!view->win) {
1455 view->win = newwin(view->height, 0, offset, 0);
1456 if (!view->win)
1457 die("Failed to create %s view", view->name);
1458
1459 scrollok(view->win, TRUE);
1460
1461 view->title = newwin(1, 0, offset + view->height, 0);
1462 if (!view->title)
1463 die("Failed to create title window");
1464
1465 } else {
1466 wresize(view->win, view->height, view->width);
1467 mvwin(view->win, offset, 0);
1468 mvwin(view->title, offset + view->height, 0);
1469 }
1470
1471 offset += view->height + 1;
1472 }
1473 }
1474
1475 static void
1476 redraw_display(void)
1477 {
1478 struct view *view;
1479 int i;
1480
1481 foreach_displayed_view (view, i) {
1482 redraw_view(view);
1483 update_view_title(view);
1484 }
1485 }
1486
1487 static void
1488 update_display_cursor(struct view *view)
1489 {
1490 /* Move the cursor to the right-most column of the cursor line.
1491 *
1492 * XXX: This could turn out to be a bit expensive, but it ensures that
1493 * the cursor does not jump around. */
1494 if (view->lines) {
1495 wmove(view->win, view->lineno - view->offset, view->width - 1);
1496 wrefresh(view->win);
1497 }
1498 }
1499
1500 /*
1501 * Navigation
1502 */
1503
1504 /* Scrolling backend */
1505 static void
1506 do_scroll_view(struct view *view, int lines)
1507 {
1508 bool redraw_current_line = FALSE;
1509
1510 /* The rendering expects the new offset. */
1511 view->offset += lines;
1512
1513 assert(0 <= view->offset && view->offset < view->lines);
1514 assert(lines);
1515
1516 /* Move current line into the view. */
1517 if (view->lineno < view->offset) {
1518 view->lineno = view->offset;
1519 redraw_current_line = TRUE;
1520 } else if (view->lineno >= view->offset + view->height) {
1521 view->lineno = view->offset + view->height - 1;
1522 redraw_current_line = TRUE;
1523 }
1524
1525 assert(view->offset <= view->lineno && view->lineno < view->lines);
1526
1527 /* Redraw the whole screen if scrolling is pointless. */
1528 if (view->height < ABS(lines)) {
1529 redraw_view(view);
1530
1531 } else {
1532 int line = lines > 0 ? view->height - lines : 0;
1533 int end = line + ABS(lines);
1534
1535 wscrl(view->win, lines);
1536
1537 for (; line < end; line++) {
1538 if (!draw_view_line(view, line))
1539 break;
1540 }
1541
1542 if (redraw_current_line)
1543 draw_view_line(view, view->lineno - view->offset);
1544 }
1545
1546 redrawwin(view->win);
1547 wrefresh(view->win);
1548 report("");
1549 }
1550
1551 /* Scroll frontend */
1552 static void
1553 scroll_view(struct view *view, enum request request)
1554 {
1555 int lines = 1;
1556
1557 assert(view_is_displayed(view));
1558
1559 switch (request) {
1560 case REQ_SCROLL_PAGE_DOWN:
1561 lines = view->height;
1562 case REQ_SCROLL_LINE_DOWN:
1563 if (view->offset + lines > view->lines)
1564 lines = view->lines - view->offset;
1565
1566 if (lines == 0 || view->offset + view->height >= view->lines) {
1567 report("Cannot scroll beyond the last line");
1568 return;
1569 }
1570 break;
1571
1572 case REQ_SCROLL_PAGE_UP:
1573 lines = view->height;
1574 case REQ_SCROLL_LINE_UP:
1575 if (lines > view->offset)
1576 lines = view->offset;
1577
1578 if (lines == 0) {
1579 report("Cannot scroll beyond the first line");
1580 return;
1581 }
1582
1583 lines = -lines;
1584 break;
1585
1586 default:
1587 die("request %d not handled in switch", request);
1588 }
1589
1590 do_scroll_view(view, lines);
1591 }
1592
1593 /* Cursor moving */
1594 static void
1595 move_view(struct view *view, enum request request)
1596 {
1597 int scroll_steps = 0;
1598 int steps;
1599
1600 switch (request) {
1601 case REQ_MOVE_FIRST_LINE:
1602 steps = -view->lineno;
1603 break;
1604
1605 case REQ_MOVE_LAST_LINE:
1606 steps = view->lines - view->lineno - 1;
1607 break;
1608
1609 case REQ_MOVE_PAGE_UP:
1610 steps = view->height > view->lineno
1611 ? -view->lineno : -view->height;
1612 break;
1613
1614 case REQ_MOVE_PAGE_DOWN:
1615 steps = view->lineno + view->height >= view->lines
1616 ? view->lines - view->lineno - 1 : view->height;
1617 break;
1618
1619 case REQ_MOVE_UP:
1620 steps = -1;
1621 break;
1622
1623 case REQ_MOVE_DOWN:
1624 steps = 1;
1625 break;
1626
1627 default:
1628 die("request %d not handled in switch", request);
1629 }
1630
1631 if (steps <= 0 && view->lineno == 0) {
1632 report("Cannot move beyond the first line");
1633 return;
1634
1635 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1636 report("Cannot move beyond the last line");
1637 return;
1638 }
1639
1640 /* Move the current line */
1641 view->lineno += steps;
1642 assert(0 <= view->lineno && view->lineno < view->lines);
1643
1644 /* Check whether the view needs to be scrolled */
1645 if (view->lineno < view->offset ||
1646 view->lineno >= view->offset + view->height) {
1647 scroll_steps = steps;
1648 if (steps < 0 && -steps > view->offset) {
1649 scroll_steps = -view->offset;
1650
1651 } else if (steps > 0) {
1652 if (view->lineno == view->lines - 1 &&
1653 view->lines > view->height) {
1654 scroll_steps = view->lines - view->offset - 1;
1655 if (scroll_steps >= view->height)
1656 scroll_steps -= view->height - 1;
1657 }
1658 }
1659 }
1660
1661 if (!view_is_displayed(view)) {
1662 view->offset += scroll_steps;
1663 assert(0 <= view->offset && view->offset < view->lines);
1664 view->ops->select(view, &view->line[view->lineno]);
1665 return;
1666 }
1667
1668 /* Repaint the old "current" line if we be scrolling */
1669 if (ABS(steps) < view->height)
1670 draw_view_line(view, view->lineno - steps - view->offset);
1671
1672 if (scroll_steps) {
1673 do_scroll_view(view, scroll_steps);
1674 return;
1675 }
1676
1677 /* Draw the current line */
1678 draw_view_line(view, view->lineno - view->offset);
1679
1680 redrawwin(view->win);
1681 wrefresh(view->win);
1682 report("");
1683 }
1684
1685
1686 /*
1687 * Searching
1688 */
1689
1690 static void search_view(struct view *view, enum request request);
1691
1692 static bool
1693 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1694 {
1695 assert(view_is_displayed(view));
1696
1697 if (!view->ops->grep(view, line))
1698 return FALSE;
1699
1700 if (lineno - view->offset >= view->height) {
1701 view->offset = lineno;
1702 view->lineno = lineno;
1703 redraw_view(view);
1704
1705 } else {
1706 unsigned long old_lineno = view->lineno - view->offset;
1707
1708 view->lineno = lineno;
1709 draw_view_line(view, old_lineno);
1710
1711 draw_view_line(view, view->lineno - view->offset);
1712 redrawwin(view->win);
1713 wrefresh(view->win);
1714 }
1715
1716 report("Line %ld matches '%s'", lineno + 1, view->grep);
1717 return TRUE;
1718 }
1719
1720 static void
1721 find_next(struct view *view, enum request request)
1722 {
1723 unsigned long lineno = view->lineno;
1724 int direction;
1725
1726 if (!*view->grep) {
1727 if (!*opt_search)
1728 report("No previous search");
1729 else
1730 search_view(view, request);
1731 return;
1732 }
1733
1734 switch (request) {
1735 case REQ_SEARCH:
1736 case REQ_FIND_NEXT:
1737 direction = 1;
1738 break;
1739
1740 case REQ_SEARCH_BACK:
1741 case REQ_FIND_PREV:
1742 direction = -1;
1743 break;
1744
1745 default:
1746 return;
1747 }
1748
1749 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1750 lineno += direction;
1751
1752 /* Note, lineno is unsigned long so will wrap around in which case it
1753 * will become bigger than view->lines. */
1754 for (; lineno < view->lines; lineno += direction) {
1755 struct line *line = &view->line[lineno];
1756
1757 if (find_next_line(view, lineno, line))
1758 return;
1759 }
1760
1761 report("No match found for '%s'", view->grep);
1762 }
1763
1764 static void
1765 search_view(struct view *view, enum request request)
1766 {
1767 int regex_err;
1768
1769 if (view->regex) {
1770 regfree(view->regex);
1771 *view->grep = 0;
1772 } else {
1773 view->regex = calloc(1, sizeof(*view->regex));
1774 if (!view->regex)
1775 return;
1776 }
1777
1778 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1779 if (regex_err != 0) {
1780 char buf[SIZEOF_STR] = "unknown error";
1781
1782 regerror(regex_err, view->regex, buf, sizeof(buf));
1783 report("Search failed: %s", buf);
1784 return;
1785 }
1786
1787 string_copy(view->grep, opt_search);
1788
1789 find_next(view, request);
1790 }
1791
1792 /*
1793 * Incremental updating
1794 */
1795
1796 static void
1797 end_update(struct view *view)
1798 {
1799 if (!view->pipe)
1800 return;
1801 set_nonblocking_input(FALSE);
1802 if (view->pipe == stdin)
1803 fclose(view->pipe);
1804 else
1805 pclose(view->pipe);
1806 view->pipe = NULL;
1807 }
1808
1809 static bool
1810 begin_update(struct view *view)
1811 {
1812 if (view->pipe)
1813 end_update(view);
1814
1815 if (opt_cmd[0]) {
1816 string_copy(view->cmd, opt_cmd);
1817 opt_cmd[0] = 0;
1818 /* When running random commands, initially show the
1819 * command in the title. However, it maybe later be
1820 * overwritten if a commit line is selected. */
1821 string_copy(view->ref, view->cmd);
1822
1823 } else if (view == VIEW(REQ_VIEW_TREE)) {
1824 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1825 char path[SIZEOF_STR];
1826
1827 if (strcmp(view->vid, view->id))
1828 opt_path[0] = path[0] = 0;
1829 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
1830 return FALSE;
1831
1832 if (!string_format(view->cmd, format, view->id, path))
1833 return FALSE;
1834
1835 } else {
1836 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1837 const char *id = view->id;
1838
1839 if (!string_format(view->cmd, format, id, id, id, id, id))
1840 return FALSE;
1841
1842 /* Put the current ref_* value to the view title ref
1843 * member. This is needed by the blob view. Most other
1844 * views sets it automatically after loading because the
1845 * first line is a commit line. */
1846 string_copy_rev(view->ref, view->id);
1847 }
1848
1849 /* Special case for the pager view. */
1850 if (opt_pipe) {
1851 view->pipe = opt_pipe;
1852 opt_pipe = NULL;
1853 } else {
1854 view->pipe = popen(view->cmd, "r");
1855 }
1856
1857 if (!view->pipe)
1858 return FALSE;
1859
1860 set_nonblocking_input(TRUE);
1861
1862 view->offset = 0;
1863 view->lines = 0;
1864 view->lineno = 0;
1865 string_copy_rev(view->vid, view->id);
1866
1867 if (view->line) {
1868 int i;
1869
1870 for (i = 0; i < view->lines; i++)
1871 if (view->line[i].data)
1872 free(view->line[i].data);
1873
1874 free(view->line);
1875 view->line = NULL;
1876 }
1877
1878 view->start_time = time(NULL);
1879
1880 return TRUE;
1881 }
1882
1883 static struct line *
1884 realloc_lines(struct view *view, size_t line_size)
1885 {
1886 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1887
1888 if (!tmp)
1889 return NULL;
1890
1891 view->line = tmp;
1892 view->line_size = line_size;
1893 return view->line;
1894 }
1895
1896 static bool
1897 update_view(struct view *view)
1898 {
1899 char in_buffer[BUFSIZ];
1900 char out_buffer[BUFSIZ * 2];
1901 char *line;
1902 /* The number of lines to read. If too low it will cause too much
1903 * redrawing (and possible flickering), if too high responsiveness
1904 * will suffer. */
1905 unsigned long lines = view->height;
1906 int redraw_from = -1;
1907
1908 if (!view->pipe)
1909 return TRUE;
1910
1911 /* Only redraw if lines are visible. */
1912 if (view->offset + view->height >= view->lines)
1913 redraw_from = view->lines - view->offset;
1914
1915 /* FIXME: This is probably not perfect for backgrounded views. */
1916 if (!realloc_lines(view, view->lines + lines))
1917 goto alloc_error;
1918
1919 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1920 size_t linelen = strlen(line);
1921
1922 if (linelen)
1923 line[linelen - 1] = 0;
1924
1925 if (opt_iconv != ICONV_NONE) {
1926 char *inbuf = line;
1927 size_t inlen = linelen;
1928
1929 char *outbuf = out_buffer;
1930 size_t outlen = sizeof(out_buffer);
1931
1932 size_t ret;
1933
1934 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1935 if (ret != (size_t) -1) {
1936 line = out_buffer;
1937 linelen = strlen(out_buffer);
1938 }
1939 }
1940
1941 if (!view->ops->read(view, line))
1942 goto alloc_error;
1943
1944 if (lines-- == 1)
1945 break;
1946 }
1947
1948 {
1949 int digits;
1950
1951 lines = view->lines;
1952 for (digits = 0; lines; digits++)
1953 lines /= 10;
1954
1955 /* Keep the displayed view in sync with line number scaling. */
1956 if (digits != view->digits) {
1957 view->digits = digits;
1958 redraw_from = 0;
1959 }
1960 }
1961
1962 if (!view_is_displayed(view))
1963 goto check_pipe;
1964
1965 if (view == VIEW(REQ_VIEW_TREE)) {
1966 /* Clear the view and redraw everything since the tree sorting
1967 * might have rearranged things. */
1968 redraw_view(view);
1969
1970 } else if (redraw_from >= 0) {
1971 /* If this is an incremental update, redraw the previous line
1972 * since for commits some members could have changed when
1973 * loading the main view. */
1974 if (redraw_from > 0)
1975 redraw_from--;
1976
1977 /* Since revision graph visualization requires knowledge
1978 * about the parent commit, it causes a further one-off
1979 * needed to be redrawn for incremental updates. */
1980 if (redraw_from > 0 && opt_rev_graph)
1981 redraw_from--;
1982
1983 /* Incrementally draw avoids flickering. */
1984 redraw_view_from(view, redraw_from);
1985 }
1986
1987 /* Update the title _after_ the redraw so that if the redraw picks up a
1988 * commit reference in view->ref it'll be available here. */
1989 update_view_title(view);
1990
1991 check_pipe:
1992 if (ferror(view->pipe)) {
1993 report("Failed to read: %s", strerror(errno));
1994 goto end;
1995
1996 } else if (feof(view->pipe)) {
1997 report("");
1998 goto end;
1999 }
2000
2001 return TRUE;
2002
2003 alloc_error:
2004 report("Allocation failure");
2005
2006 end:
2007 view->ops->read(view, NULL);
2008 end_update(view);
2009 return FALSE;
2010 }
2011
2012 static struct line *
2013 add_line_data(struct view *view, void *data, enum line_type type)
2014 {
2015 struct line *line = &view->line[view->lines++];
2016
2017 memset(line, 0, sizeof(*line));
2018 line->type = type;
2019 line->data = data;
2020
2021 return line;
2022 }
2023
2024 static struct line *
2025 add_line_text(struct view *view, char *data, enum line_type type)
2026 {
2027 if (data)
2028 data = strdup(data);
2029
2030 return data ? add_line_data(view, data, type) : NULL;
2031 }
2032
2033
2034 /*
2035 * View opening
2036 */
2037
2038 enum open_flags {
2039 OPEN_DEFAULT = 0, /* Use default view switching. */
2040 OPEN_SPLIT = 1, /* Split current view. */
2041 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2042 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2043 };
2044
2045 static void
2046 open_view(struct view *prev, enum request request, enum open_flags flags)
2047 {
2048 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2049 bool split = !!(flags & OPEN_SPLIT);
2050 bool reload = !!(flags & OPEN_RELOAD);
2051 struct view *view = VIEW(request);
2052 int nviews = displayed_views();
2053 struct view *base_view = display[0];
2054
2055 if (view == prev && nviews == 1 && !reload) {
2056 report("Already in %s view", view->name);
2057 return;
2058 }
2059
2060 if (view->ops->open) {
2061 if (!view->ops->open(view)) {
2062 report("Failed to load %s view", view->name);
2063 return;
2064 }
2065
2066 } else if ((reload || strcmp(view->vid, view->id)) &&
2067 !begin_update(view)) {
2068 report("Failed to load %s view", view->name);
2069 return;
2070 }
2071
2072 if (split) {
2073 display[1] = view;
2074 if (!backgrounded)
2075 current_view = 1;
2076 } else {
2077 /* Maximize the current view. */
2078 memset(display, 0, sizeof(display));
2079 current_view = 0;
2080 display[current_view] = view;
2081 }
2082
2083 /* Resize the view when switching between split- and full-screen,
2084 * or when switching between two different full-screen views. */
2085 if (nviews != displayed_views() ||
2086 (nviews == 1 && base_view != display[0]))
2087 resize_display();
2088
2089 if (split && prev->lineno - prev->offset >= prev->height) {
2090 /* Take the title line into account. */
2091 int lines = prev->lineno - prev->offset - prev->height + 1;
2092
2093 /* Scroll the view that was split if the current line is
2094 * outside the new limited view. */
2095 do_scroll_view(prev, lines);
2096 }
2097
2098 if (prev && view != prev) {
2099 if (split && !backgrounded) {
2100 /* "Blur" the previous view. */
2101 update_view_title(prev);
2102 }
2103
2104 view->parent = prev;
2105 }
2106
2107 if (view->pipe && view->lines == 0) {
2108 /* Clear the old view and let the incremental updating refill
2109 * the screen. */
2110 wclear(view->win);
2111 report("");
2112 } else {
2113 redraw_view(view);
2114 report("");
2115 }
2116
2117 /* If the view is backgrounded the above calls to report()
2118 * won't redraw the view title. */
2119 if (backgrounded)
2120 update_view_title(view);
2121 }
2122
2123 static void
2124 open_editor(struct view *view, char *file)
2125 {
2126 char cmd[SIZEOF_STR];
2127 char file_sq[SIZEOF_STR];
2128 char *editor;
2129
2130 editor = getenv("GIT_EDITOR");
2131 if (!editor && *opt_editor)
2132 editor = opt_editor;
2133 if (!editor)
2134 editor = getenv("VISUAL");
2135 if (!editor)
2136 editor = getenv("EDITOR");
2137 if (!editor)
2138 editor = "vi";
2139
2140 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2141 string_format(cmd, "%s %s", editor, file_sq)) {
2142 def_prog_mode(); /* save current tty modes */
2143 endwin(); /* restore original tty modes */
2144 system(cmd);
2145 reset_prog_mode();
2146 redraw_display();
2147 }
2148 }
2149
2150 /*
2151 * User request switch noodle
2152 */
2153
2154 static int
2155 view_driver(struct view *view, enum request request)
2156 {
2157 int i;
2158
2159 if (view && view->lines) {
2160 request = view->ops->request(view, request, &view->line[view->lineno]);
2161 if (request == REQ_NONE)
2162 return TRUE;
2163 }
2164
2165 switch (request) {
2166 case REQ_MOVE_UP:
2167 case REQ_MOVE_DOWN:
2168 case REQ_MOVE_PAGE_UP:
2169 case REQ_MOVE_PAGE_DOWN:
2170 case REQ_MOVE_FIRST_LINE:
2171 case REQ_MOVE_LAST_LINE:
2172 move_view(view, request);
2173 break;
2174
2175 case REQ_SCROLL_LINE_DOWN:
2176 case REQ_SCROLL_LINE_UP:
2177 case REQ_SCROLL_PAGE_DOWN:
2178 case REQ_SCROLL_PAGE_UP:
2179 scroll_view(view, request);
2180 break;
2181
2182 case REQ_VIEW_BLOB:
2183 if (!ref_blob[0]) {
2184 report("No file chosen, press %s to open tree view",
2185 get_key(REQ_VIEW_TREE));
2186 break;
2187 }
2188 open_view(view, request, OPEN_DEFAULT);
2189 break;
2190
2191 case REQ_VIEW_PAGER:
2192 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2193 report("No pager content, press %s to run command from prompt",
2194 get_key(REQ_PROMPT));
2195 break;
2196 }
2197 open_view(view, request, OPEN_DEFAULT);
2198 break;
2199
2200 case REQ_VIEW_MAIN:
2201 case REQ_VIEW_DIFF:
2202 case REQ_VIEW_LOG:
2203 case REQ_VIEW_TREE:
2204 case REQ_VIEW_HELP:
2205 case REQ_VIEW_STATUS:
2206 open_view(view, request, OPEN_DEFAULT);
2207 break;
2208
2209 case REQ_NEXT:
2210 case REQ_PREVIOUS:
2211 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2212
2213 if ((view == VIEW(REQ_VIEW_DIFF) &&
2214 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2215 (view == VIEW(REQ_VIEW_BLOB) &&
2216 view->parent == VIEW(REQ_VIEW_TREE))) {
2217 int line;
2218
2219 view = view->parent;
2220 line = view->lineno;
2221 move_view(view, request);
2222 if (view_is_displayed(view))
2223 update_view_title(view);
2224 if (line == view->lineno)
2225 break;
2226 } else {
2227 move_view(view, request);
2228 break;
2229 }
2230 /* Fall-through */
2231
2232
2233 case REQ_VIEW_NEXT:
2234 {
2235 int nviews = displayed_views();
2236 int next_view = (current_view + 1) % nviews;
2237
2238 if (next_view == current_view) {
2239 report("Only one view is displayed");
2240 break;
2241 }
2242
2243 current_view = next_view;
2244 /* Blur out the title of the previous view. */
2245 update_view_title(view);
2246 report("");
2247 break;
2248 }
2249 case REQ_TOGGLE_LINENO:
2250 opt_line_number = !opt_line_number;
2251 redraw_display();
2252 break;
2253
2254 case REQ_TOGGLE_REV_GRAPH:
2255 opt_rev_graph = !opt_rev_graph;
2256 redraw_display();
2257 break;
2258
2259 case REQ_PROMPT:
2260 /* Always reload^Wrerun commands from the prompt. */
2261 open_view(view, opt_request, OPEN_RELOAD);
2262 break;
2263
2264 case REQ_SEARCH:
2265 case REQ_SEARCH_BACK:
2266 search_view(view, request);
2267 break;
2268
2269 case REQ_FIND_NEXT:
2270 case REQ_FIND_PREV:
2271 find_next(view, request);
2272 break;
2273
2274 case REQ_STOP_LOADING:
2275 for (i = 0; i < ARRAY_SIZE(views); i++) {
2276 view = &views[i];
2277 if (view->pipe)
2278 report("Stopped loading the %s view", view->name),
2279 end_update(view);
2280 }
2281 break;
2282
2283 case REQ_SHOW_VERSION:
2284 report("tig-%s (built %s)", VERSION, __DATE__);
2285 return TRUE;
2286
2287 case REQ_SCREEN_RESIZE:
2288 resize_display();
2289 /* Fall-through */
2290 case REQ_SCREEN_REDRAW:
2291 redraw_display();
2292 break;
2293
2294 case REQ_EDIT:
2295 report("Nothing to edit");
2296 break;
2297
2298 case REQ_ENTER:
2299 report("Nothing to enter");
2300 break;
2301
2302 case REQ_NONE:
2303 doupdate();
2304 return TRUE;
2305
2306 case REQ_VIEW_CLOSE:
2307 /* XXX: Mark closed views by letting view->parent point to the
2308 * view itself. Parents to closed view should never be
2309 * followed. */
2310 if (view->parent &&
2311 view->parent->parent != view->parent) {
2312 memset(display, 0, sizeof(display));
2313 current_view = 0;
2314 display[current_view] = view->parent;
2315 view->parent = view;
2316 resize_display();
2317 redraw_display();
2318 break;
2319 }
2320 /* Fall-through */
2321 case REQ_QUIT:
2322 return FALSE;
2323
2324 default:
2325 /* An unknown key will show most commonly used commands. */
2326 report("Unknown key, press 'h' for help");
2327 return TRUE;
2328 }
2329
2330 return TRUE;
2331 }
2332
2333
2334 /*
2335 * Pager backend
2336 */
2337
2338 static bool
2339 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2340 {
2341 char *text = line->data;
2342 enum line_type type = line->type;
2343 int textlen = strlen(text);
2344 int attr;
2345
2346 wmove(view->win, lineno, 0);
2347
2348 if (selected) {
2349 type = LINE_CURSOR;
2350 wchgat(view->win, -1, 0, type, NULL);
2351 }
2352
2353 attr = get_line_attr(type);
2354 wattrset(view->win, attr);
2355
2356 if (opt_line_number || opt_tab_size < TABSIZE) {
2357 static char spaces[] = " ";
2358 int col_offset = 0, col = 0;
2359
2360 if (opt_line_number) {
2361 unsigned long real_lineno = view->offset + lineno + 1;
2362
2363 if (real_lineno == 1 ||
2364 (real_lineno % opt_num_interval) == 0) {
2365 wprintw(view->win, "%.*d", view->digits, real_lineno);
2366
2367 } else {
2368 waddnstr(view->win, spaces,
2369 MIN(view->digits, STRING_SIZE(spaces)));
2370 }
2371 waddstr(view->win, ": ");
2372 col_offset = view->digits + 2;
2373 }
2374
2375 while (text && col_offset + col < view->width) {
2376 int cols_max = view->width - col_offset - col;
2377 char *pos = text;
2378 int cols;
2379
2380 if (*text == '\t') {
2381 text++;
2382 assert(sizeof(spaces) > TABSIZE);
2383 pos = spaces;
2384 cols = opt_tab_size - (col % opt_tab_size);
2385
2386 } else {
2387 text = strchr(text, '\t');
2388 cols = line ? text - pos : strlen(pos);
2389 }
2390
2391 waddnstr(view->win, pos, MIN(cols, cols_max));
2392 col += cols;
2393 }
2394
2395 } else {
2396 int col = 0, pos = 0;
2397
2398 for (; pos < textlen && col < view->width; pos++, col++)
2399 if (text[pos] == '\t')
2400 col += TABSIZE - (col % TABSIZE) - 1;
2401
2402 waddnstr(view->win, text, pos);
2403 }
2404
2405 return TRUE;
2406 }
2407
2408 static bool
2409 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2410 {
2411 char refbuf[SIZEOF_STR];
2412 char *ref = NULL;
2413 FILE *pipe;
2414
2415 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2416 return TRUE;
2417
2418 pipe = popen(refbuf, "r");
2419 if (!pipe)
2420 return TRUE;
2421
2422 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2423 ref = chomp_string(ref);
2424 pclose(pipe);
2425
2426 if (!ref || !*ref)
2427 return TRUE;
2428
2429 /* This is the only fatal call, since it can "corrupt" the buffer. */
2430 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2431 return FALSE;
2432
2433 return TRUE;
2434 }
2435
2436 static void
2437 add_pager_refs(struct view *view, struct line *line)
2438 {
2439 char buf[SIZEOF_STR];
2440 char *commit_id = line->data + STRING_SIZE("commit ");
2441 struct ref **refs;
2442 size_t bufpos = 0, refpos = 0;
2443 const char *sep = "Refs: ";
2444 bool is_tag = FALSE;
2445
2446 assert(line->type == LINE_COMMIT);
2447
2448 refs = get_refs(commit_id);
2449 if (!refs) {
2450 if (view == VIEW(REQ_VIEW_DIFF))
2451 goto try_add_describe_ref;
2452 return;
2453 }
2454
2455 do {
2456 struct ref *ref = refs[refpos];
2457 char *fmt = ref->tag ? "%s[%s]" :
2458 ref->remote ? "%s<%s>" : "%s%s";
2459
2460 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2461 return;
2462 sep = ", ";
2463 if (ref->tag)
2464 is_tag = TRUE;
2465 } while (refs[refpos++]->next);
2466
2467 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2468 try_add_describe_ref:
2469 /* Add <tag>-g<commit_id> "fake" reference. */
2470 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2471 return;
2472 }
2473
2474 if (bufpos == 0)
2475 return;
2476
2477 if (!realloc_lines(view, view->line_size + 1))
2478 return;
2479
2480 add_line_text(view, buf, LINE_PP_REFS);
2481 }
2482
2483 static bool
2484 pager_read(struct view *view, char *data)
2485 {
2486 struct line *line;
2487
2488 if (!data)
2489 return TRUE;
2490
2491 line = add_line_text(view, data, get_line_type(data));
2492 if (!line)
2493 return FALSE;
2494
2495 if (line->type == LINE_COMMIT &&
2496 (view == VIEW(REQ_VIEW_DIFF) ||
2497 view == VIEW(REQ_VIEW_LOG)))
2498 add_pager_refs(view, line);
2499
2500 return TRUE;
2501 }
2502
2503 static enum request
2504 pager_request(struct view *view, enum request request, struct line *line)
2505 {
2506 int split = 0;
2507
2508 if (request != REQ_ENTER)
2509 return request;
2510
2511 if (line->type == LINE_COMMIT &&
2512 (view == VIEW(REQ_VIEW_LOG) ||
2513 view == VIEW(REQ_VIEW_PAGER))) {
2514 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2515 split = 1;
2516 }
2517
2518 /* Always scroll the view even if it was split. That way
2519 * you can use Enter to scroll through the log view and
2520 * split open each commit diff. */
2521 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2522
2523 /* FIXME: A minor workaround. Scrolling the view will call report("")
2524 * but if we are scrolling a non-current view this won't properly
2525 * update the view title. */
2526 if (split)
2527 update_view_title(view);
2528
2529 return REQ_NONE;
2530 }
2531
2532 static bool
2533 pager_grep(struct view *view, struct line *line)
2534 {
2535 regmatch_t pmatch;
2536 char *text = line->data;
2537
2538 if (!*text)
2539 return FALSE;
2540
2541 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2542 return FALSE;
2543
2544 return TRUE;
2545 }
2546
2547 static void
2548 pager_select(struct view *view, struct line *line)
2549 {
2550 if (line->type == LINE_COMMIT) {
2551 char *text = line->data + STRING_SIZE("commit ");
2552
2553 if (view != VIEW(REQ_VIEW_PAGER))
2554 string_copy_rev(view->ref, text);
2555 string_copy_rev(ref_commit, text);
2556 }
2557 }
2558
2559 static struct view_ops pager_ops = {
2560 "line",
2561 NULL,
2562 pager_read,
2563 pager_draw,
2564 pager_request,
2565 pager_grep,
2566 pager_select,
2567 };
2568
2569
2570 /*
2571 * Help backend
2572 */
2573
2574 static bool
2575 help_open(struct view *view)
2576 {
2577 char buf[BUFSIZ];
2578 int lines = ARRAY_SIZE(req_info) + 2;
2579 int i;
2580
2581 if (view->lines > 0)
2582 return TRUE;
2583
2584 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2585 if (!req_info[i].request)
2586 lines++;
2587
2588 view->line = calloc(lines, sizeof(*view->line));
2589 if (!view->line)
2590 return FALSE;
2591
2592 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2593
2594 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2595 char *key;
2596
2597 if (!req_info[i].request) {
2598 add_line_text(view, "", LINE_DEFAULT);
2599 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2600 continue;
2601 }
2602
2603 key = get_key(req_info[i].request);
2604 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2605 continue;
2606
2607 add_line_text(view, buf, LINE_DEFAULT);
2608 }
2609
2610 return TRUE;
2611 }
2612
2613 static struct view_ops help_ops = {
2614 "line",
2615 help_open,
2616 NULL,
2617 pager_draw,
2618 pager_request,
2619 pager_grep,
2620 pager_select,
2621 };
2622
2623
2624 /*
2625 * Tree backend
2626 */
2627
2628 /* Parse output from git-ls-tree(1):
2629 *
2630 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2631 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2632 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2633 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2634 */
2635
2636 #define SIZEOF_TREE_ATTR \
2637 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2638
2639 #define TREE_UP_FORMAT "040000 tree %s\t.."
2640
2641 static int
2642 tree_compare_entry(enum line_type type1, char *name1,
2643 enum line_type type2, char *name2)
2644 {
2645 if (type1 != type2) {
2646 if (type1 == LINE_TREE_DIR)
2647 return -1;
2648 return 1;
2649 }
2650
2651 return strcmp(name1, name2);
2652 }
2653
2654 static bool
2655 tree_read(struct view *view, char *text)
2656 {
2657 size_t textlen = text ? strlen(text) : 0;
2658 char buf[SIZEOF_STR];
2659 unsigned long pos;
2660 enum line_type type;
2661 bool first_read = view->lines == 0;
2662
2663 if (textlen <= SIZEOF_TREE_ATTR)
2664 return FALSE;
2665
2666 type = text[STRING_SIZE("100644 ")] == 't'
2667 ? LINE_TREE_DIR : LINE_TREE_FILE;
2668
2669 if (first_read) {
2670 /* Add path info line */
2671 if (!string_format(buf, "Directory path /%s", opt_path) ||
2672 !realloc_lines(view, view->line_size + 1) ||
2673 !add_line_text(view, buf, LINE_DEFAULT))
2674 return FALSE;
2675
2676 /* Insert "link" to parent directory. */
2677 if (*opt_path) {
2678 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
2679 !realloc_lines(view, view->line_size + 1) ||
2680 !add_line_text(view, buf, LINE_TREE_DIR))
2681 return FALSE;
2682 }
2683 }
2684
2685 /* Strip the path part ... */
2686 if (*opt_path) {
2687 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2688 size_t striplen = strlen(opt_path);
2689 char *path = text + SIZEOF_TREE_ATTR;
2690
2691 if (pathlen > striplen)
2692 memmove(path, path + striplen,
2693 pathlen - striplen + 1);
2694 }
2695
2696 /* Skip "Directory ..." and ".." line. */
2697 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2698 struct line *line = &view->line[pos];
2699 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2700 char *path2 = text + SIZEOF_TREE_ATTR;
2701 int cmp = tree_compare_entry(line->type, path1, type, path2);
2702
2703 if (cmp <= 0)
2704 continue;
2705
2706 text = strdup(text);
2707 if (!text)
2708 return FALSE;
2709
2710 if (view->lines > pos)
2711 memmove(&view->line[pos + 1], &view->line[pos],
2712 (view->lines - pos) * sizeof(*line));
2713
2714 line = &view->line[pos];
2715 line->data = text;
2716 line->type = type;
2717 view->lines++;
2718 return TRUE;
2719 }
2720
2721 if (!add_line_text(view, text, type))
2722 return FALSE;
2723
2724 /* Move the current line to the first tree entry. */
2725 if (first_read)
2726 view->lineno++;
2727
2728 return TRUE;
2729 }
2730
2731 static enum request
2732 tree_request(struct view *view, enum request request, struct line *line)
2733 {
2734 enum open_flags flags;
2735
2736 if (request != REQ_ENTER)
2737 return request;
2738
2739 switch (line->type) {
2740 case LINE_TREE_DIR:
2741 /* Depending on whether it is a subdir or parent (updir?) link
2742 * mangle the path buffer. */
2743 if (line == &view->line[1] && *opt_path) {
2744 size_t path_len = strlen(opt_path);
2745 char *dirsep = opt_path + path_len - 1;
2746
2747 while (dirsep > opt_path && dirsep[-1] != '/')
2748 dirsep--;
2749
2750 dirsep[0] = 0;
2751
2752 } else {
2753 size_t pathlen = strlen(opt_path);
2754 size_t origlen = pathlen;
2755 char *data = line->data;
2756 char *basename = data + SIZEOF_TREE_ATTR;
2757
2758 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
2759 opt_path[origlen] = 0;
2760 return TRUE;
2761 }
2762 }
2763
2764 /* Trees and subtrees share the same ID, so they are not not
2765 * unique like blobs. */
2766 flags = OPEN_RELOAD;
2767 request = REQ_VIEW_TREE;
2768 break;
2769
2770 case LINE_TREE_FILE:
2771 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2772 request = REQ_VIEW_BLOB;
2773 break;
2774
2775 default:
2776 return TRUE;
2777 }
2778
2779 open_view(view, request, flags);
2780
2781 return REQ_NONE;
2782 }
2783
2784 static void
2785 tree_select(struct view *view, struct line *line)
2786 {
2787 char *text = line->data + STRING_SIZE("100644 blob ");
2788
2789 if (line->type == LINE_TREE_FILE) {
2790 string_copy_rev(ref_blob, text);
2791
2792 } else if (line->type != LINE_TREE_DIR) {
2793 return;
2794 }
2795
2796 string_copy_rev(view->ref, text);
2797 }
2798
2799 static struct view_ops tree_ops = {
2800 "file",
2801 NULL,
2802 tree_read,
2803 pager_draw,
2804 tree_request,
2805 pager_grep,
2806 tree_select,
2807 };
2808
2809 static bool
2810 blob_read(struct view *view, char *line)
2811 {
2812 return add_line_text(view, line, LINE_DEFAULT);
2813 }
2814
2815 static struct view_ops blob_ops = {
2816 "line",
2817 NULL,
2818 blob_read,
2819 pager_draw,
2820 pager_request,
2821 pager_grep,
2822 pager_select,
2823 };
2824
2825
2826 /*
2827 * Status backend
2828 */
2829
2830 struct status {
2831 char status;
2832 struct {
2833 mode_t mode;
2834 char rev[SIZEOF_REV];
2835 } old;
2836 struct {
2837 mode_t mode;
2838 char rev[SIZEOF_REV];
2839 } new;
2840 char name[SIZEOF_STR];
2841 };
2842
2843 /* Get fields from the diff line:
2844 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
2845 */
2846 static inline bool
2847 status_get_diff(struct status *file, char *buf, size_t bufsize)
2848 {
2849 char *old_mode = buf + 1;
2850 char *new_mode = buf + 8;
2851 char *old_rev = buf + 15;
2852 char *new_rev = buf + 56;
2853 char *status = buf + 97;
2854
2855 if (bufsize != 99 ||
2856 old_mode[-1] != ':' ||
2857 new_mode[-1] != ' ' ||
2858 old_rev[-1] != ' ' ||
2859 new_rev[-1] != ' ' ||
2860 status[-1] != ' ')
2861 return FALSE;
2862
2863 file->status = *status;
2864
2865 string_copy_rev(file->old.rev, old_rev);
2866 string_copy_rev(file->new.rev, new_rev);
2867
2868 file->old.mode = strtoul(old_mode, NULL, 8);
2869 file->new.mode = strtoul(new_mode, NULL, 8);
2870
2871 file->name[0] = 0;
2872
2873 return TRUE;
2874 }
2875
2876 static bool
2877 status_run(struct view *view, const char cmd[], bool diff, enum line_type type)
2878 {
2879 struct status *file = NULL;
2880 char buf[SIZEOF_STR * 4];
2881 size_t bufsize = 0;
2882 FILE *pipe;
2883
2884 pipe = popen(cmd, "r");
2885 if (!pipe)
2886 return FALSE;
2887
2888 add_line_data(view, NULL, type);
2889
2890 while (!feof(pipe) && !ferror(pipe)) {
2891 char *sep;
2892 size_t readsize;
2893
2894 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
2895 if (!readsize)
2896 break;
2897 bufsize += readsize;
2898
2899 /* Process while we have NUL chars. */
2900 while ((sep = memchr(buf, 0, bufsize))) {
2901 size_t sepsize = sep - buf + 1;
2902
2903 if (!file) {
2904 if (!realloc_lines(view, view->line_size + 1))
2905 goto error_out;
2906
2907 file = calloc(1, sizeof(*file));
2908 if (!file)
2909 goto error_out;
2910
2911 add_line_data(view, file, type);
2912 }
2913
2914 /* Parse diff info part. */
2915 if (!diff) {
2916 file->status = '?';
2917
2918 } else if (!file->status) {
2919 if (!status_get_diff(file, buf, sepsize))
2920 goto error_out;
2921
2922 bufsize -= sepsize;
2923 memmove(buf, sep + 1, bufsize);
2924
2925 sep = memchr(buf, 0, bufsize);
2926 if (!sep)
2927 break;
2928 sepsize = sep - buf + 1;
2929 }
2930
2931 /* git-ls-files just delivers a NUL separated
2932 * list of file names similar to the second half
2933 * of the git-diff-* output. */
2934 string_ncopy(file->name, buf, sepsize);
2935 bufsize -= sepsize;
2936 memmove(buf, sep + 1, bufsize);
2937 file = NULL;
2938 }
2939 }
2940
2941 if (ferror(pipe)) {
2942 error_out:
2943 pclose(pipe);
2944 return FALSE;
2945 }
2946
2947 if (!view->line[view->lines - 1].data)
2948 add_line_data(view, NULL, LINE_STAT_NONE);
2949
2950 pclose(pipe);
2951 return TRUE;
2952 }
2953
2954 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --cached HEAD"
2955 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
2956 #define STATUS_LIST_OTHER_CMD \
2957 "git ls-files -z --others --exclude-per-directory=.gitignore"
2958
2959 #define STATUS_DIFF_SHOW_CMD \
2960 "git diff --root --patch-with-stat --find-copies-harder -B -C %s -- %s 2>/dev/null"
2961
2962 /* First parse staged info using git-diff-index(1), then parse unstaged
2963 * info using git-diff-files(1), and finally untracked files using
2964 * git-ls-files(1). */
2965 static bool
2966 status_open(struct view *view)
2967 {
2968 struct stat statbuf;
2969 char exclude[SIZEOF_STR];
2970 char cmd[SIZEOF_STR];
2971 size_t i;
2972
2973 for (i = 0; i < view->lines; i++)
2974 free(view->line[i].data);
2975 free(view->line);
2976 view->lines = view->line_size = 0;
2977 view->line = NULL;
2978
2979 if (!realloc_lines(view, view->line_size + 6))
2980 return FALSE;
2981
2982 if (!string_format(exclude, "%s/info/exclude", opt_git_dir))
2983 return FALSE;
2984
2985 string_copy(cmd, STATUS_LIST_OTHER_CMD);
2986
2987 if (stat(exclude, &statbuf) >= 0) {
2988 size_t cmdsize = strlen(cmd);
2989
2990 if (!string_format_from(cmd, &cmdsize, " %s", "--exclude-from=") ||
2991 sq_quote(cmd, cmdsize, exclude) >= sizeof(cmd))
2992 return FALSE;
2993 }
2994
2995 if (!status_run(view, STATUS_DIFF_INDEX_CMD, TRUE, LINE_STAT_STAGED) ||
2996 !status_run(view, STATUS_DIFF_FILES_CMD, TRUE, LINE_STAT_UNSTAGED) ||
2997 !status_run(view, cmd, FALSE, LINE_STAT_UNTRACKED))
2998 return FALSE;
2999
3000 return TRUE;
3001 }
3002
3003 static bool
3004 status_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3005 {
3006 struct status *status = line->data;
3007
3008 wmove(view->win, lineno, 0);
3009
3010 if (selected) {
3011 wattrset(view->win, get_line_attr(LINE_CURSOR));
3012 wchgat(view->win, -1, 0, LINE_CURSOR, NULL);
3013
3014 } else if (!status && line->type != LINE_STAT_NONE) {
3015 wattrset(view->win, get_line_attr(LINE_STAT_SECTION));
3016 wchgat(view->win, -1, 0, LINE_STAT_SECTION, NULL);
3017
3018 } else {
3019 wattrset(view->win, get_line_attr(line->type));
3020 }
3021
3022 if (!status) {
3023 char *text;
3024
3025 switch (line->type) {
3026 case LINE_STAT_STAGED:
3027 text = "Changes to be committed:";
3028 break;
3029
3030 case LINE_STAT_UNSTAGED:
3031 text = "Changed but not updated:";
3032 break;
3033
3034 case LINE_STAT_UNTRACKED:
3035 text = "Untracked files:";
3036 break;
3037
3038 case LINE_STAT_NONE:
3039 text = " (no files)";
3040 break;
3041
3042 default:
3043 return FALSE;
3044 }
3045
3046 waddstr(view->win, text);
3047 return TRUE;
3048 }
3049
3050 waddch(view->win, status->status);
3051 if (!selected)
3052 wattrset(view->win, A_NORMAL);
3053 wmove(view->win, lineno, 4);
3054 waddstr(view->win, status->name);
3055
3056 return TRUE;
3057 }
3058
3059 static enum request
3060 status_enter(struct view *view, struct line *line)
3061 {
3062 struct status *status = line->data;
3063 char path[SIZEOF_STR] = "";
3064 char *info;
3065 size_t cmdsize = 0;
3066
3067 if (line->type == LINE_STAT_NONE ||
3068 (!status && line[1].type == LINE_STAT_NONE)) {
3069 report("No file to diff");
3070 return REQ_NONE;
3071 }
3072
3073 if (status && sq_quote(path, 0, status->name) >= sizeof(path))
3074 return REQ_QUIT;
3075
3076 if (opt_cdup[0] &&
3077 line->type != LINE_STAT_UNTRACKED &&
3078 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
3079 return REQ_QUIT;
3080
3081 switch (line->type) {
3082 case LINE_STAT_STAGED:
3083 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3084 "--cached", path))
3085 return REQ_QUIT;
3086 if (status)
3087 info = "Staged changes to %s";
3088 else
3089 info = "Staged changes";
3090 break;
3091
3092 case LINE_STAT_UNSTAGED:
3093 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3094 "", path))
3095 return REQ_QUIT;
3096 if (status)
3097 info = "Unstaged changes to %s";
3098 else
3099 info = "Unstaged changes";
3100 break;
3101
3102 case LINE_STAT_UNTRACKED:
3103 if (opt_pipe)
3104 return REQ_QUIT;
3105
3106
3107 if (!status) {
3108 report("No file to show");
3109 return REQ_NONE;
3110 }
3111
3112 opt_pipe = fopen(status->name, "r");
3113 info = "Untracked file %s";
3114 break;
3115
3116 default:
3117 die("w00t");
3118 }
3119
3120 open_view(view, REQ_VIEW_DIFF, OPEN_RELOAD | OPEN_SPLIT);
3121 if (view_is_displayed(VIEW(REQ_VIEW_DIFF))) {
3122 string_format(VIEW(REQ_VIEW_DIFF)->ref, info, status->name);
3123 }
3124
3125 return REQ_NONE;
3126 }
3127
3128
3129 static bool
3130 status_update_file(struct view *view, struct status *status, enum line_type type)
3131 {
3132 char cmd[SIZEOF_STR];
3133 char buf[SIZEOF_STR];
3134 size_t cmdsize = 0;
3135 size_t bufsize = 0;
3136 size_t written = 0;
3137 FILE *pipe;
3138
3139 if (opt_cdup[0] &&
3140 type != LINE_STAT_UNTRACKED &&
3141 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3142 return FALSE;
3143
3144 switch (type) {
3145 case LINE_STAT_STAGED:
3146 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
3147 status->old.mode,
3148 status->old.rev,
3149 status->name, 0))
3150 return FALSE;
3151
3152 string_add(cmd, cmdsize, "git update-index -z --index-info");
3153 break;
3154
3155 case LINE_STAT_UNSTAGED:
3156 case LINE_STAT_UNTRACKED:
3157 if (!string_format_from(buf, &bufsize, "%s%c", status->name, 0))
3158 return FALSE;
3159
3160 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
3161 break;
3162
3163 default:
3164 die("w00t");
3165 }
3166
3167 pipe = popen(cmd, "w");
3168 if (!pipe)
3169 return FALSE;
3170
3171 while (!ferror(pipe) && written < bufsize) {
3172 written += fwrite(buf + written, 1, bufsize - written, pipe);
3173 }
3174
3175 pclose(pipe);
3176
3177 if (written != bufsize)
3178 return FALSE;
3179
3180 return TRUE;
3181 }
3182
3183 static void
3184 status_update(struct view *view)
3185 {
3186 struct line *line = &view->line[view->lineno];
3187
3188 assert(view->lines);
3189
3190 if (!line->data) {
3191 while (++line < view->line + view->lines && line->data) {
3192 if (!status_update_file(view, line->data, line->type))
3193 report("Failed to update file status");
3194 }
3195
3196 if (!line[-1].data) {
3197 report("Nothing to update");
3198 return;
3199 }
3200
3201 } else if (!status_update_file(view, line->data, line->type)) {
3202 report("Failed to update file status");
3203 }
3204
3205 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3206 }
3207
3208 static enum request
3209 status_request(struct view *view, enum request request, struct line *line)
3210 {
3211 struct status *status = line->data;
3212
3213 switch (request) {
3214 case REQ_STATUS_UPDATE:
3215 status_update(view);
3216 break;
3217
3218 case REQ_EDIT:
3219 if (!status)
3220 return request;
3221
3222 open_editor(view, status->name);
3223 break;
3224
3225 case REQ_ENTER:
3226 status_enter(view, line);
3227 break;
3228
3229 default:
3230 return request;
3231 }
3232
3233 return REQ_NONE;
3234 }
3235
3236 static void
3237 status_select(struct view *view, struct line *line)
3238 {
3239 struct status *status = line->data;
3240 char file[SIZEOF_STR] = "all files";
3241 char *text;
3242
3243 if (status && !string_format(file, "'%s'", status->name))
3244 return;
3245
3246 if (!status && line[1].type == LINE_STAT_NONE)
3247 line++;
3248
3249 switch (line->type) {
3250 case LINE_STAT_STAGED:
3251 text = "Press %s to unstage %s for commit";
3252 break;
3253
3254 case LINE_STAT_UNSTAGED:
3255 text = "Press %s to stage %s for commit";
3256 break;
3257
3258 case LINE_STAT_UNTRACKED:
3259 text = "Press %s to stage %s for addition";
3260 break;
3261
3262 case LINE_STAT_NONE:
3263 text = "Nothing to update";
3264 break;
3265
3266 default:
3267 die("w00t");
3268 }
3269
3270 string_format(view->ref, text, get_key(REQ_STATUS_UPDATE), file);
3271 }
3272
3273 static bool
3274 status_grep(struct view *view, struct line *line)
3275 {
3276 struct status *status = line->data;
3277 enum { S_STATUS, S_NAME, S_END } state;
3278 char buf[2] = "?";
3279 regmatch_t pmatch;
3280
3281 if (!status)
3282 return FALSE;
3283
3284 for (state = S_STATUS; state < S_END; state++) {
3285 char *text;
3286
3287 switch (state) {
3288 case S_NAME: text = status->name; break;
3289 case S_STATUS:
3290 buf[0] = status->status;
3291 text = buf;
3292 break;
3293
3294 default:
3295 return FALSE;
3296 }
3297
3298 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3299 return TRUE;
3300 }
3301
3302 return FALSE;
3303 }
3304
3305 static struct view_ops status_ops = {
3306 "file",
3307 status_open,
3308 NULL,
3309 status_draw,
3310 status_request,
3311 status_grep,
3312 status_select,
3313 };
3314
3315
3316 /*
3317 * Revision graph
3318 */
3319
3320 struct commit {
3321 char id[SIZEOF_REV]; /* SHA1 ID. */
3322 char title[128]; /* First line of the commit message. */
3323 char author[75]; /* Author of the commit. */
3324 struct tm time; /* Date from the author ident. */
3325 struct ref **refs; /* Repository references. */
3326 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
3327 size_t graph_size; /* The width of the graph array. */
3328 };
3329
3330 /* Size of rev graph with no "padding" columns */
3331 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
3332
3333 struct rev_graph {
3334 struct rev_graph *prev, *next, *parents;
3335 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
3336 size_t size;
3337 struct commit *commit;
3338 size_t pos;
3339 };
3340
3341 /* Parents of the commit being visualized. */
3342 static struct rev_graph graph_parents[4];
3343
3344 /* The current stack of revisions on the graph. */
3345 static struct rev_graph graph_stacks[4] = {
3346 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
3347 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
3348 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
3349 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
3350 };
3351
3352 static inline bool
3353 graph_parent_is_merge(struct rev_graph *graph)
3354 {
3355 return graph->parents->size > 1;
3356 }
3357
3358 static inline void
3359 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
3360 {
3361 struct commit *commit = graph->commit;
3362
3363 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
3364 commit->graph[commit->graph_size++] = symbol;
3365 }
3366
3367 static void
3368 done_rev_graph(struct rev_graph *graph)
3369 {
3370 if (graph_parent_is_merge(graph) &&
3371 graph->pos < graph->size - 1 &&
3372 graph->next->size == graph->size + graph->parents->size - 1) {
3373 size_t i = graph->pos + graph->parents->size - 1;
3374
3375 graph->commit->graph_size = i * 2;
3376 while (i < graph->next->size - 1) {
3377 append_to_rev_graph(graph, ' ');
3378 append_to_rev_graph(graph, '\\');
3379 i++;
3380 }
3381 }
3382
3383 graph->size = graph->pos = 0;
3384 graph->commit = NULL;
3385 memset(graph->parents, 0, sizeof(*graph->parents));
3386 }
3387
3388 static void
3389 push_rev_graph(struct rev_graph *graph, char *parent)
3390 {
3391 int i;
3392
3393 /* "Collapse" duplicate parents lines.
3394 *
3395 * FIXME: This needs to also update update the drawn graph but
3396 * for now it just serves as a method for pruning graph lines. */
3397 for (i = 0; i < graph->size; i++)
3398 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
3399 return;
3400
3401 if (graph->size < SIZEOF_REVITEMS) {
3402 string_copy_rev(graph->rev[graph->size++], parent);
3403 }
3404 }
3405
3406 static chtype
3407 get_rev_graph_symbol(struct rev_graph *graph)
3408 {
3409 chtype symbol;
3410
3411 if (graph->parents->size == 0)
3412 symbol = REVGRAPH_INIT;
3413 else if (graph_parent_is_merge(graph))
3414 symbol = REVGRAPH_MERGE;
3415 else if (graph->pos >= graph->size)
3416 symbol = REVGRAPH_BRANCH;
3417 else
3418 symbol = REVGRAPH_COMMIT;
3419
3420 return symbol;
3421 }
3422
3423 static void
3424 draw_rev_graph(struct rev_graph *graph)
3425 {
3426 struct rev_filler {
3427 chtype separator, line;
3428 };
3429 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
3430 static struct rev_filler fillers[] = {
3431 { ' ', REVGRAPH_LINE },
3432 { '`', '.' },
3433 { '\'', ' ' },
3434 { '/', ' ' },
3435 };
3436 chtype symbol = get_rev_graph_symbol(graph);
3437 struct rev_filler *filler;
3438 size_t i;
3439
3440 filler = &fillers[DEFAULT];
3441
3442 for (i = 0; i < graph->pos; i++) {
3443 append_to_rev_graph(graph, filler->line);
3444 if (graph_parent_is_merge(graph->prev) &&
3445 graph->prev->pos == i)
3446 filler = &fillers[RSHARP];
3447
3448 append_to_rev_graph(graph, filler->separator);
3449 }
3450
3451 /* Place the symbol for this revision. */
3452 append_to_rev_graph(graph, symbol);
3453
3454 if (graph->prev->size > graph->size)
3455 filler = &fillers[RDIAG];
3456 else
3457 filler = &fillers[DEFAULT];
3458
3459 i++;
3460
3461 for (; i < graph->size; i++) {
3462 append_to_rev_graph(graph, filler->separator);
3463 append_to_rev_graph(graph, filler->line);
3464 if (graph_parent_is_merge(graph->prev) &&
3465 i < graph->prev->pos + graph->parents->size)
3466 filler = &fillers[RSHARP];
3467 if (graph->prev->size > graph->size)
3468 filler = &fillers[LDIAG];
3469 }
3470
3471 if (graph->prev->size > graph->size) {
3472 append_to_rev_graph(graph, filler->separator);
3473 if (filler->line != ' ')
3474 append_to_rev_graph(graph, filler->line);
3475 }
3476 }
3477
3478 /* Prepare the next rev graph */
3479 static void
3480 prepare_rev_graph(struct rev_graph *graph)
3481 {
3482 size_t i;
3483
3484 /* First, traverse all lines of revisions up to the active one. */
3485 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
3486 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
3487 break;
3488
3489 push_rev_graph(graph->next, graph->rev[graph->pos]);
3490 }
3491
3492 /* Interleave the new revision parent(s). */
3493 for (i = 0; i < graph->parents->size; i++)
3494 push_rev_graph(graph->next, graph->parents->rev[i]);
3495
3496 /* Lastly, put any remaining revisions. */
3497 for (i = graph->pos + 1; i < graph->size; i++)
3498 push_rev_graph(graph->next, graph->rev[i]);
3499 }
3500
3501 static void
3502 update_rev_graph(struct rev_graph *graph)
3503 {
3504 /* If this is the finalizing update ... */
3505 if (graph->commit)
3506 prepare_rev_graph(graph);
3507
3508 /* Graph visualization needs a one rev look-ahead,
3509 * so the first update doesn't visualize anything. */
3510 if (!graph->prev->commit)
3511 return;
3512
3513 draw_rev_graph(graph->prev);
3514 done_rev_graph(graph->prev->prev);
3515 }
3516
3517
3518 /*
3519 * Main view backend
3520 */
3521
3522 static bool
3523 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3524 {
3525 char buf[DATE_COLS + 1];
3526 struct commit *commit = line->data;
3527 enum line_type type;
3528 int col = 0;
3529 size_t timelen;
3530 size_t authorlen;
3531 int trimmed = 1;
3532
3533 if (!*commit->author)
3534 return FALSE;
3535
3536 wmove(view->win, lineno, col);
3537
3538 if (selected) {
3539 type = LINE_CURSOR;
3540 wattrset(view->win, get_line_attr(type));
3541 wchgat(view->win, -1, 0, type, NULL);
3542
3543 } else {
3544 type = LINE_MAIN_COMMIT;
3545 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
3546 }
3547
3548 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
3549 waddnstr(view->win, buf, timelen);
3550 waddstr(view->win, " ");
3551
3552 col += DATE_COLS;
3553 wmove(view->win, lineno, col);
3554 if (type != LINE_CURSOR)
3555 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
3556
3557 if (opt_utf8) {
3558 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
3559 } else {
3560 authorlen = strlen(commit->author);
3561 if (authorlen > AUTHOR_COLS - 2) {
3562 authorlen = AUTHOR_COLS - 2;
3563 trimmed = 1;
3564 }
3565 }
3566
3567 if (trimmed) {
3568 waddnstr(view->win, commit->author, authorlen);
3569 if (type != LINE_CURSOR)
3570 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
3571 waddch(view->win, '~');
3572 } else {
3573 waddstr(view->win, commit->author);
3574 }
3575
3576 col += AUTHOR_COLS;
3577 if (type != LINE_CURSOR)
3578 wattrset(view->win, A_NORMAL);
3579
3580 if (opt_rev_graph && commit->graph_size) {
3581 size_t i;
3582
3583 wmove(view->win, lineno, col);
3584 /* Using waddch() instead of waddnstr() ensures that
3585 * they'll be rendered correctly for the cursor line. */
3586 for (i = 0; i < commit->graph_size; i++)
3587 waddch(view->win, commit->graph[i]);
3588
3589 waddch(view->win, ' ');
3590 col += commit->graph_size + 1;
3591 }
3592
3593 wmove(view->win, lineno, col);
3594
3595 if (commit->refs) {
3596 size_t i = 0;
3597
3598 do {
3599 if (type == LINE_CURSOR)
3600 ;
3601 else if (commit->refs[i]->tag)
3602 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
3603 else if (commit->refs[i]->remote)
3604 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
3605 else
3606 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
3607 waddstr(view->win, "[");
3608 waddstr(view->win, commit->refs[i]->name);
3609 waddstr(view->win, "]");
3610 if (type != LINE_CURSOR)
3611 wattrset(view->win, A_NORMAL);
3612 waddstr(view->win, " ");
3613 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
3614 } while (commit->refs[i++]->next);
3615 }
3616
3617 if (type != LINE_CURSOR)
3618 wattrset(view->win, get_line_attr(type));
3619
3620 {
3621 int titlelen = strlen(commit->title);
3622
3623 if (col + titlelen > view->width)
3624 titlelen = view->width - col;
3625
3626 waddnstr(view->win, commit->title, titlelen);
3627 }
3628
3629 return TRUE;
3630 }
3631
3632 /* Reads git log --pretty=raw output and parses it into the commit struct. */
3633 static bool
3634 main_read(struct view *view, char *line)
3635 {
3636 static struct rev_graph *graph = graph_stacks;
3637 enum line_type type;
3638 struct commit *commit;
3639
3640 if (!line) {
3641 update_rev_graph(graph);
3642 return TRUE;
3643 }
3644
3645 type = get_line_type(line);
3646 if (type == LINE_COMMIT) {
3647 commit = calloc(1, sizeof(struct commit));
3648 if (!commit)
3649 return FALSE;
3650
3651 string_copy_rev(commit->id, line + STRING_SIZE("commit "));
3652 commit->refs = get_refs(commit->id);
3653 graph->commit = commit;
3654 add_line_data(view, commit, LINE_MAIN_COMMIT);
3655 return TRUE;
3656 }
3657
3658 if (!view->lines)
3659 return TRUE;
3660 commit = view->line[view->lines - 1].data;
3661
3662 switch (type) {
3663 case LINE_PARENT:
3664 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
3665 break;
3666
3667 case LINE_AUTHOR:
3668 {
3669 /* Parse author lines where the name may be empty:
3670 * author <email@address.tld> 1138474660 +0100
3671 */
3672 char *ident = line + STRING_SIZE("author ");
3673 char *nameend = strchr(ident, '<');
3674 char *emailend = strchr(ident, '>');
3675
3676 if (!nameend || !emailend)
3677 break;
3678
3679 update_rev_graph(graph);
3680 graph = graph->next;
3681
3682 *nameend = *emailend = 0;
3683 ident = chomp_string(ident);
3684 if (!*ident) {
3685 ident = chomp_string(nameend + 1);
3686 if (!*ident)
3687 ident = "Unknown";
3688 }
3689
3690 string_ncopy(commit->author, ident, strlen(ident));
3691
3692 /* Parse epoch and timezone */
3693 if (emailend[1] == ' ') {
3694 char *secs = emailend + 2;
3695 char *zone = strchr(secs, ' ');
3696 time_t time = (time_t) atol(secs);
3697
3698 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3699 long tz;
3700
3701 zone++;
3702 tz = ('0' - zone[1]) * 60 * 60 * 10;
3703 tz += ('0' - zone[2]) * 60 * 60;
3704 tz += ('0' - zone[3]) * 60;
3705 tz += ('0' - zone[4]) * 60;
3706
3707 if (zone[0] == '-')
3708 tz = -tz;
3709
3710 time -= tz;
3711 }
3712
3713 gmtime_r(&time, &commit->time);
3714 }
3715 break;
3716 }
3717 default:
3718 /* Fill in the commit title if it has not already been set. */
3719 if (commit->title[0])
3720 break;
3721
3722 /* Require titles to start with a non-space character at the
3723 * offset used by git log. */
3724 if (strncmp(line, " ", 4))
3725 break;
3726 line += 4;
3727 /* Well, if the title starts with a whitespace character,
3728 * try to be forgiving. Otherwise we end up with no title. */
3729 while (isspace(*line))
3730 line++;
3731 if (*line == '\0')
3732 break;
3733 /* FIXME: More graceful handling of titles; append "..." to
3734 * shortened titles, etc. */
3735
3736 string_ncopy(commit->title, line, strlen(line));
3737 }
3738
3739 return TRUE;
3740 }
3741
3742 static enum request
3743 main_request(struct view *view, enum request request, struct line *line)
3744 {
3745 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3746
3747 if (request == REQ_ENTER)
3748 open_view(view, REQ_VIEW_DIFF, flags);
3749 else
3750 return request;
3751
3752 return REQ_NONE;
3753 }
3754
3755 static bool
3756 main_grep(struct view *view, struct line *line)
3757 {
3758 struct commit *commit = line->data;
3759 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
3760 char buf[DATE_COLS + 1];
3761 regmatch_t pmatch;
3762
3763 for (state = S_TITLE; state < S_END; state++) {
3764 char *text;
3765
3766 switch (state) {
3767 case S_TITLE: text = commit->title; break;
3768 case S_AUTHOR: text = commit->author; break;
3769 case S_DATE:
3770 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
3771 continue;
3772 text = buf;
3773 break;
3774
3775 default:
3776 return FALSE;
3777 }
3778
3779 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3780 return TRUE;
3781 }
3782
3783 return FALSE;
3784 }
3785
3786 static void
3787 main_select(struct view *view, struct line *line)
3788 {
3789 struct commit *commit = line->data;
3790
3791 string_copy_rev(view->ref, commit->id);
3792 string_copy_rev(ref_commit, view->ref);
3793 }
3794
3795 static struct view_ops main_ops = {
3796 "commit",
3797 NULL,
3798 main_read,
3799 main_draw,
3800 main_request,
3801 main_grep,
3802 main_select,
3803 };
3804
3805
3806 /*
3807 * Unicode / UTF-8 handling
3808 *
3809 * NOTE: Much of the following code for dealing with unicode is derived from
3810 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
3811 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
3812 */
3813
3814 /* I've (over)annotated a lot of code snippets because I am not entirely
3815 * confident that the approach taken by this small UTF-8 interface is correct.
3816 * --jonas */
3817
3818 static inline int
3819 unicode_width(unsigned long c)
3820 {
3821 if (c >= 0x1100 &&
3822 (c <= 0x115f /* Hangul Jamo */
3823 || c == 0x2329
3824 || c == 0x232a
3825 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
3826 /* CJK ... Yi */
3827 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
3828 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
3829 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
3830 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
3831 || (c >= 0xffe0 && c <= 0xffe6)
3832 || (c >= 0x20000 && c <= 0x2fffd)
3833 || (c >= 0x30000 && c <= 0x3fffd)))
3834 return 2;
3835
3836 return 1;
3837 }
3838
3839 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3840 * Illegal bytes are set one. */
3841 static const unsigned char utf8_bytes[256] = {
3842 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,
3843 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,
3844 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,
3845 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,
3846 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,
3847 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,
3848 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,
3849 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,
3850 };
3851
3852 /* Decode UTF-8 multi-byte representation into a unicode character. */
3853 static inline unsigned long
3854 utf8_to_unicode(const char *string, size_t length)
3855 {
3856 unsigned long unicode;
3857
3858 switch (length) {
3859 case 1:
3860 unicode = string[0];
3861 break;
3862 case 2:
3863 unicode = (string[0] & 0x1f) << 6;
3864 unicode += (string[1] & 0x3f);
3865 break;
3866 case 3:
3867 unicode = (string[0] & 0x0f) << 12;
3868 unicode += ((string[1] & 0x3f) << 6);
3869 unicode += (string[2] & 0x3f);
3870 break;
3871 case 4:
3872 unicode = (string[0] & 0x0f) << 18;
3873 unicode += ((string[1] & 0x3f) << 12);
3874 unicode += ((string[2] & 0x3f) << 6);
3875 unicode += (string[3] & 0x3f);
3876 break;
3877 case 5:
3878 unicode = (string[0] & 0x0f) << 24;
3879 unicode += ((string[1] & 0x3f) << 18);
3880 unicode += ((string[2] & 0x3f) << 12);
3881 unicode += ((string[3] & 0x3f) << 6);
3882 unicode += (string[4] & 0x3f);
3883 break;
3884 case 6:
3885 unicode = (string[0] & 0x01) << 30;
3886 unicode += ((string[1] & 0x3f) << 24);
3887 unicode += ((string[2] & 0x3f) << 18);
3888 unicode += ((string[3] & 0x3f) << 12);
3889 unicode += ((string[4] & 0x3f) << 6);
3890 unicode += (string[5] & 0x3f);
3891 break;
3892 default:
3893 die("Invalid unicode length");
3894 }
3895
3896 /* Invalid characters could return the special 0xfffd value but NUL
3897 * should be just as good. */
3898 return unicode > 0xffff ? 0 : unicode;
3899 }
3900
3901 /* Calculates how much of string can be shown within the given maximum width
3902 * and sets trimmed parameter to non-zero value if all of string could not be
3903 * shown.
3904 *
3905 * Additionally, adds to coloffset how many many columns to move to align with
3906 * the expected position. Takes into account how multi-byte and double-width
3907 * characters will effect the cursor position.
3908 *
3909 * Returns the number of bytes to output from string to satisfy max_width. */
3910 static size_t
3911 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3912 {
3913 const char *start = string;
3914 const char *end = strchr(string, '\0');
3915 size_t mbwidth = 0;
3916 size_t width = 0;
3917
3918 *trimmed = 0;
3919
3920 while (string < end) {
3921 int c = *(unsigned char *) string;
3922 unsigned char bytes = utf8_bytes[c];
3923 size_t ucwidth;
3924 unsigned long unicode;
3925
3926 if (string + bytes > end)
3927 break;
3928
3929 /* Change representation to figure out whether
3930 * it is a single- or double-width character. */
3931
3932 unicode = utf8_to_unicode(string, bytes);
3933 /* FIXME: Graceful handling of invalid unicode character. */
3934 if (!unicode)
3935 break;
3936
3937 ucwidth = unicode_width(unicode);
3938 width += ucwidth;
3939 if (width > max_width) {
3940 *trimmed = 1;
3941 break;
3942 }
3943
3944 /* The column offset collects the differences between the
3945 * number of bytes encoding a character and the number of
3946 * columns will be used for rendering said character.
3947 *
3948 * So if some character A is encoded in 2 bytes, but will be
3949 * represented on the screen using only 1 byte this will and up
3950 * adding 1 to the multi-byte column offset.
3951 *
3952 * Assumes that no double-width character can be encoding in
3953 * less than two bytes. */
3954 if (bytes > ucwidth)
3955 mbwidth += bytes - ucwidth;
3956
3957 string += bytes;
3958 }
3959
3960 *coloffset += mbwidth;
3961
3962 return string - start;
3963 }
3964
3965
3966 /*
3967 * Status management
3968 */
3969
3970 /* Whether or not the curses interface has been initialized. */
3971 static bool cursed = FALSE;
3972
3973 /* The status window is used for polling keystrokes. */
3974 static WINDOW *status_win;
3975
3976 static bool status_empty = TRUE;
3977
3978 /* Update status and title window. */
3979 static void
3980 report(const char *msg, ...)
3981 {
3982 struct view *view = display[current_view];
3983
3984 if (input_mode)
3985 return;
3986
3987 if (!status_empty || *msg) {
3988 va_list args;
3989
3990 va_start(args, msg);
3991
3992 wmove(status_win, 0, 0);
3993 if (*msg) {
3994 vwprintw(status_win, msg, args);
3995 status_empty = FALSE;
3996 } else {
3997 status_empty = TRUE;
3998 }
3999 wclrtoeol(status_win);
4000 wrefresh(status_win);
4001
4002 va_end(args);
4003 }
4004
4005 update_view_title(view);
4006 update_display_cursor(view);
4007 }
4008
4009 /* Controls when nodelay should be in effect when polling user input. */
4010 static void
4011 set_nonblocking_input(bool loading)
4012 {
4013 static unsigned int loading_views;
4014
4015 if ((loading == FALSE && loading_views-- == 1) ||
4016 (loading == TRUE && loading_views++ == 0))
4017 nodelay(status_win, loading);
4018 }
4019
4020 static void
4021 init_display(void)
4022 {
4023 int x, y;
4024
4025 /* Initialize the curses library */
4026 if (isatty(STDIN_FILENO)) {
4027 cursed = !!initscr();
4028 } else {
4029 /* Leave stdin and stdout alone when acting as a pager. */
4030 FILE *io = fopen("/dev/tty", "r+");
4031
4032 if (!io)
4033 die("Failed to open /dev/tty");
4034 cursed = !!newterm(NULL, io, io);
4035 }
4036
4037 if (!cursed)
4038 die("Failed to initialize curses");
4039
4040 nonl(); /* Tell curses not to do NL->CR/NL on output */
4041 cbreak(); /* Take input chars one at a time, no wait for \n */
4042 noecho(); /* Don't echo input */
4043 leaveok(stdscr, TRUE);
4044
4045 if (has_colors())
4046 init_colors();
4047
4048 getmaxyx(stdscr, y, x);
4049 status_win = newwin(1, 0, y - 1, 0);
4050 if (!status_win)
4051 die("Failed to create status window");
4052
4053 /* Enable keyboard mapping */
4054 keypad(status_win, TRUE);
4055 wbkgdset(status_win, get_line_attr(LINE_STATUS));
4056 }
4057
4058 static char *
4059 read_prompt(const char *prompt)
4060 {
4061 enum { READING, STOP, CANCEL } status = READING;
4062 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
4063 int pos = 0;
4064
4065 while (status == READING) {
4066 struct view *view;
4067 int i, key;
4068
4069 input_mode = TRUE;
4070
4071 foreach_view (view, i)
4072 update_view(view);
4073
4074 input_mode = FALSE;
4075
4076 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
4077 wclrtoeol(status_win);
4078
4079 /* Refresh, accept single keystroke of input */
4080 key = wgetch(status_win);
4081 switch (key) {
4082 case KEY_RETURN:
4083 case KEY_ENTER:
4084 case '\n':
4085 status = pos ? STOP : CANCEL;
4086 break;
4087
4088 case KEY_BACKSPACE:
4089 if (pos > 0)
4090 pos--;
4091 else
4092 status = CANCEL;
4093 break;
4094
4095 case KEY_ESC:
4096 status = CANCEL;
4097 break;
4098
4099 case ERR:
4100 break;
4101
4102 default:
4103 if (pos >= sizeof(buf)) {
4104 report("Input string too long");
4105 return NULL;
4106 }
4107
4108 if (isprint(key))
4109 buf[pos++] = (char) key;
4110 }
4111 }
4112
4113 /* Clear the status window */
4114 status_empty = FALSE;
4115 report("");
4116
4117 if (status == CANCEL)
4118 return NULL;
4119
4120 buf[pos++] = 0;
4121
4122 return buf;
4123 }
4124
4125 /*
4126 * Repository references
4127 */
4128
4129 static struct ref *refs;
4130 static size_t refs_size;
4131
4132 /* Id <-> ref store */
4133 static struct ref ***id_refs;
4134 static size_t id_refs_size;
4135
4136 static struct ref **
4137 get_refs(char *id)
4138 {
4139 struct ref ***tmp_id_refs;
4140 struct ref **ref_list = NULL;
4141 size_t ref_list_size = 0;
4142 size_t i;
4143
4144 for (i = 0; i < id_refs_size; i++)
4145 if (!strcmp(id, id_refs[i][0]->id))
4146 return id_refs[i];
4147
4148 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
4149 if (!tmp_id_refs)
4150 return NULL;
4151
4152 id_refs = tmp_id_refs;
4153
4154 for (i = 0; i < refs_size; i++) {
4155 struct ref **tmp;
4156
4157 if (strcmp(id, refs[i].id))
4158 continue;
4159
4160 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
4161 if (!tmp) {
4162 if (ref_list)
4163 free(ref_list);
4164 return NULL;
4165 }
4166
4167 ref_list = tmp;
4168 if (ref_list_size > 0)
4169 ref_list[ref_list_size - 1]->next = 1;
4170 ref_list[ref_list_size] = &refs[i];
4171
4172 /* XXX: The properties of the commit chains ensures that we can
4173 * safely modify the shared ref. The repo references will
4174 * always be similar for the same id. */
4175 ref_list[ref_list_size]->next = 0;
4176 ref_list_size++;
4177 }
4178
4179 if (ref_list)
4180 id_refs[id_refs_size++] = ref_list;
4181
4182 return ref_list;
4183 }
4184
4185 static int
4186 read_ref(char *id, size_t idlen, char *name, size_t namelen)
4187 {
4188 struct ref *ref;
4189 bool tag = FALSE;
4190 bool remote = FALSE;
4191
4192 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
4193 /* Commits referenced by tags has "^{}" appended. */
4194 if (name[namelen - 1] != '}')
4195 return OK;
4196
4197 while (namelen > 0 && name[namelen] != '^')
4198 namelen--;
4199
4200 tag = TRUE;
4201 namelen -= STRING_SIZE("refs/tags/");
4202 name += STRING_SIZE("refs/tags/");
4203
4204 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
4205 remote = TRUE;
4206 namelen -= STRING_SIZE("refs/remotes/");
4207 name += STRING_SIZE("refs/remotes/");
4208
4209 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
4210 namelen -= STRING_SIZE("refs/heads/");
4211 name += STRING_SIZE("refs/heads/");
4212
4213 } else if (!strcmp(name, "HEAD")) {
4214 return OK;
4215 }
4216
4217 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
4218 if (!refs)
4219 return ERR;
4220
4221 ref = &refs[refs_size++];
4222 ref->name = malloc(namelen + 1);
4223 if (!ref->name)
4224 return ERR;
4225
4226 strncpy(ref->name, name, namelen);
4227 ref->name[namelen] = 0;
4228 ref->tag = tag;
4229 ref->remote = remote;
4230 string_copy_rev(ref->id, id);
4231
4232 return OK;
4233 }
4234
4235 static int
4236 load_refs(void)
4237 {
4238 const char *cmd_env = getenv("TIG_LS_REMOTE");
4239 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
4240
4241 return read_properties(popen(cmd, "r"), "\t", read_ref);
4242 }
4243
4244 static int
4245 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
4246 {
4247 if (!strcmp(name, "i18n.commitencoding"))
4248 string_ncopy(opt_encoding, value, valuelen);
4249
4250 if (!strcmp(name, "core.editor"))
4251 string_ncopy(opt_editor, value, valuelen);
4252
4253 return OK;
4254 }
4255
4256 static int
4257 load_repo_config(void)
4258 {
4259 return read_properties(popen("git repo-config --list", "r"),
4260 "=", read_repo_config_option);
4261 }
4262
4263 static int
4264 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
4265 {
4266 if (!opt_git_dir[0])
4267 string_ncopy(opt_git_dir, name, namelen);
4268 else
4269 string_ncopy(opt_cdup, name, namelen);
4270 return OK;
4271 }
4272
4273 /* XXX: The line outputted by "--show-cdup" can be empty so the option
4274 * must be the last one! */
4275 static int
4276 load_repo_info(void)
4277 {
4278 return read_properties(popen("git rev-parse --git-dir --show-cdup 2>/dev/null", "r"),
4279 "=", read_repo_info);
4280 }
4281
4282 static int
4283 read_properties(FILE *pipe, const char *separators,
4284 int (*read_property)(char *, size_t, char *, size_t))
4285 {
4286 char buffer[BUFSIZ];
4287 char *name;
4288 int state = OK;
4289
4290 if (!pipe)
4291 return ERR;
4292
4293 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4294 char *value;
4295 size_t namelen;
4296 size_t valuelen;
4297
4298 name = chomp_string(name);
4299 namelen = strcspn(name, separators);
4300
4301 if (name[namelen]) {
4302 name[namelen] = 0;
4303 value = chomp_string(name + namelen + 1);
4304 valuelen = strlen(value);
4305
4306 } else {
4307 value = "";
4308 valuelen = 0;
4309 }
4310
4311 state = read_property(name, namelen, value, valuelen);
4312 }
4313
4314 if (state != ERR && ferror(pipe))
4315 state = ERR;
4316
4317 pclose(pipe);
4318
4319 return state;
4320 }
4321
4322
4323 /*
4324 * Main
4325 */
4326
4327 static void __NORETURN
4328 quit(int sig)
4329 {
4330 /* XXX: Restore tty modes and let the OS cleanup the rest! */
4331 if (cursed)
4332 endwin();
4333 exit(0);
4334 }
4335
4336 static void __NORETURN
4337 die(const char *err, ...)
4338 {
4339 va_list args;
4340
4341 endwin();
4342
4343 va_start(args, err);
4344 fputs("tig: ", stderr);
4345 vfprintf(stderr, err, args);
4346 fputs("\n", stderr);
4347 va_end(args);
4348
4349 exit(1);
4350 }
4351
4352 int
4353 main(int argc, char *argv[])
4354 {
4355 struct view *view;
4356 enum request request;
4357 size_t i;
4358
4359 signal(SIGINT, quit);
4360
4361 if (setlocale(LC_ALL, "")) {
4362 char *codeset = nl_langinfo(CODESET);
4363
4364 string_ncopy(opt_codeset, codeset, strlen(codeset));
4365 }
4366
4367 if (load_repo_info() == ERR)
4368 die("Failed to load repo info.");
4369
4370 /* Require a git repository unless when running in pager mode. */
4371 if (!opt_git_dir[0])
4372 die("Not a git repository");
4373
4374 if (load_options() == ERR)
4375 die("Failed to load user config.");
4376
4377 /* Load the repo config file so options can be overwritten from
4378 * the command line. */
4379 if (load_repo_config() == ERR)
4380 die("Failed to load repo config.");
4381
4382 if (!parse_options(argc, argv))
4383 return 0;
4384
4385 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
4386 opt_iconv = iconv_open(opt_codeset, opt_encoding);
4387 if (opt_iconv == ICONV_NONE)
4388 die("Failed to initialize character set conversion");
4389 }
4390
4391 if (load_refs() == ERR)
4392 die("Failed to load refs.");
4393
4394 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
4395 view->cmd_env = getenv(view->cmd_env);
4396
4397 request = opt_request;
4398
4399 init_display();
4400
4401 while (view_driver(display[current_view], request)) {
4402 int key;
4403 int i;
4404
4405 foreach_view (view, i)
4406 update_view(view);
4407
4408 /* Refresh, accept single keystroke of input */
4409 key = wgetch(status_win);
4410
4411 /* wgetch() with nodelay() enabled returns ERR when there's no
4412 * input. */
4413 if (key == ERR) {
4414 request = REQ_NONE;
4415 continue;
4416 }
4417
4418 request = get_keybinding(display[current_view]->keymap, key);
4419
4420 /* Some low-level request handling. This keeps access to
4421 * status_win restricted. */
4422 switch (request) {
4423 case REQ_PROMPT:
4424 {
4425 char *cmd = read_prompt(":");
4426
4427 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
4428 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
4429 opt_request = REQ_VIEW_DIFF;
4430 } else {
4431 opt_request = REQ_VIEW_PAGER;
4432 }
4433 break;
4434 }
4435
4436 request = REQ_NONE;
4437 break;
4438 }
4439 case REQ_SEARCH:
4440 case REQ_SEARCH_BACK:
4441 {
4442 const char *prompt = request == REQ_SEARCH
4443 ? "/" : "?";
4444 char *search = read_prompt(prompt);
4445
4446 if (search)
4447 string_ncopy(opt_search, search, strlen(search));
4448 else
4449 request = REQ_NONE;
4450 break;
4451 }
4452 case REQ_SCREEN_RESIZE:
4453 {
4454 int height, width;
4455
4456 getmaxyx(stdscr, height, width);
4457
4458 /* Resize the status view and let the view driver take
4459 * care of resizing the displayed views. */
4460 wresize(status_win, 1, width);
4461 mvwin(status_win, height - 1, 0);
4462 wrefresh(status_win);
4463 break;
4464 }
4465 default:
4466 break;
4467 }
4468 }
4469
4470 quit(0);
4471
4472 return 0;
4473 }
Full-screen terminal Git browser.