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