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draw_text: remove unused col argument
[tig] / tig.c
1 /* Copyright (c) 2006-2007 Jonas Fonseca <fonseca@diku.dk>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
17
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
21
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
25
26 #include <assert.h>
27 #include <errno.h>
28 #include <ctype.h>
29 #include <signal.h>
30 #include <stdarg.h>
31 #include <stdio.h>
32 #include <stdlib.h>
33 #include <string.h>
34 #include <sys/types.h>
35 #include <sys/stat.h>
36 #include <unistd.h>
37 #include <time.h>
38
39 #include <regex.h>
40
41 #include <locale.h>
42 #include <langinfo.h>
43 #include <iconv.h>
44
45 /* ncurses(3): Must be defined to have extended wide-character functions. */
46 #define _XOPEN_SOURCE_EXTENDED
47
48 #include <curses.h>
49
50 #if __GNUC__ >= 3
51 #define __NORETURN __attribute__((__noreturn__))
52 #else
53 #define __NORETURN
54 #endif
55
56 static void __NORETURN die(const char *err, ...);
57 static void warn(const char *msg, ...);
58 static void report(const char *msg, ...);
59 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, size_t, char *, size_t));
60 static void set_nonblocking_input(bool loading);
61 static size_t utf8_length(const char *string, size_t max_width, int *trimmed, bool reserve);
62
63 #define ABS(x) ((x) >= 0 ? (x) : -(x))
64 #define MIN(x, y) ((x) < (y) ? (x) : (y))
65
66 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
67 #define STRING_SIZE(x) (sizeof(x) - 1)
68
69 #define SIZEOF_STR 1024 /* Default string size. */
70 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
71 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
72
73 /* Revision graph */
74
75 #define REVGRAPH_INIT 'I'
76 #define REVGRAPH_MERGE 'M'
77 #define REVGRAPH_BRANCH '+'
78 #define REVGRAPH_COMMIT '*'
79 #define REVGRAPH_BOUND '^'
80 #define REVGRAPH_LINE '|'
81
82 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
83
84 /* This color name can be used to refer to the default term colors. */
85 #define COLOR_DEFAULT (-1)
86
87 #define ICONV_NONE ((iconv_t) -1)
88 #ifndef ICONV_CONST
89 #define ICONV_CONST /* nothing */
90 #endif
91
92 /* The format and size of the date column in the main view. */
93 #define DATE_FORMAT "%Y-%m-%d %H:%M"
94 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
95
96 #define AUTHOR_COLS 20
97
98 /* The default interval between line numbers. */
99 #define NUMBER_INTERVAL 1
100
101 #define TABSIZE 8
102
103 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
104
105 #ifndef GIT_CONFIG
106 #define GIT_CONFIG "git config"
107 #endif
108
109 #define TIG_LS_REMOTE \
110 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
111
112 #define TIG_DIFF_CMD \
113 "git show --pretty=fuller --no-color --root --patch-with-stat --find-copies-harder -C %s 2>/dev/null"
114
115 #define TIG_LOG_CMD \
116 "git log --no-color --cc --stat -n100 %s 2>/dev/null"
117
118 #define TIG_MAIN_CMD \
119 "git log --no-color --topo-order --parents --boundary --pretty=raw %s 2>/dev/null"
120
121 #define TIG_TREE_CMD \
122 "git ls-tree %s %s"
123
124 #define TIG_BLOB_CMD \
125 "git cat-file blob %s"
126
127 /* XXX: Needs to be defined to the empty string. */
128 #define TIG_HELP_CMD ""
129 #define TIG_PAGER_CMD ""
130 #define TIG_STATUS_CMD ""
131 #define TIG_STAGE_CMD ""
132
133 /* Some ascii-shorthands fitted into the ncurses namespace. */
134 #define KEY_TAB '\t'
135 #define KEY_RETURN '\r'
136 #define KEY_ESC 27
137
138
139 struct ref {
140 char *name; /* Ref name; tag or head names are shortened. */
141 char id[SIZEOF_REV]; /* Commit SHA1 ID */
142 unsigned int tag:1; /* Is it a tag? */
143 unsigned int ltag:1; /* If so, is the tag local? */
144 unsigned int remote:1; /* Is it a remote ref? */
145 unsigned int next:1; /* For ref lists: are there more refs? */
146 };
147
148 static struct ref **get_refs(char *id);
149
150 struct int_map {
151 const char *name;
152 int namelen;
153 int value;
154 };
155
156 static int
157 set_from_int_map(struct int_map *map, size_t map_size,
158 int *value, const char *name, int namelen)
159 {
160
161 int i;
162
163 for (i = 0; i < map_size; i++)
164 if (namelen == map[i].namelen &&
165 !strncasecmp(name, map[i].name, namelen)) {
166 *value = map[i].value;
167 return OK;
168 }
169
170 return ERR;
171 }
172
173
174 /*
175 * String helpers
176 */
177
178 static inline void
179 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
180 {
181 if (srclen > dstlen - 1)
182 srclen = dstlen - 1;
183
184 strncpy(dst, src, srclen);
185 dst[srclen] = 0;
186 }
187
188 /* Shorthands for safely copying into a fixed buffer. */
189
190 #define string_copy(dst, src) \
191 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
192
193 #define string_ncopy(dst, src, srclen) \
194 string_ncopy_do(dst, sizeof(dst), src, srclen)
195
196 #define string_copy_rev(dst, src) \
197 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
198
199 #define string_add(dst, from, src) \
200 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
201
202 static char *
203 chomp_string(char *name)
204 {
205 int namelen;
206
207 while (isspace(*name))
208 name++;
209
210 namelen = strlen(name) - 1;
211 while (namelen > 0 && isspace(name[namelen]))
212 name[namelen--] = 0;
213
214 return name;
215 }
216
217 static bool
218 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
219 {
220 va_list args;
221 size_t pos = bufpos ? *bufpos : 0;
222
223 va_start(args, fmt);
224 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
225 va_end(args);
226
227 if (bufpos)
228 *bufpos = pos;
229
230 return pos >= bufsize ? FALSE : TRUE;
231 }
232
233 #define string_format(buf, fmt, args...) \
234 string_nformat(buf, sizeof(buf), NULL, fmt, args)
235
236 #define string_format_from(buf, from, fmt, args...) \
237 string_nformat(buf, sizeof(buf), from, fmt, args)
238
239 static int
240 string_enum_compare(const char *str1, const char *str2, int len)
241 {
242 size_t i;
243
244 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
245
246 /* Diff-Header == DIFF_HEADER */
247 for (i = 0; i < len; i++) {
248 if (toupper(str1[i]) == toupper(str2[i]))
249 continue;
250
251 if (string_enum_sep(str1[i]) &&
252 string_enum_sep(str2[i]))
253 continue;
254
255 return str1[i] - str2[i];
256 }
257
258 return 0;
259 }
260
261 /* Shell quoting
262 *
263 * NOTE: The following is a slightly modified copy of the git project's shell
264 * quoting routines found in the quote.c file.
265 *
266 * Help to copy the thing properly quoted for the shell safety. any single
267 * quote is replaced with '\'', any exclamation point is replaced with '\!',
268 * and the whole thing is enclosed in a
269 *
270 * E.g.
271 * original sq_quote result
272 * name ==> name ==> 'name'
273 * a b ==> a b ==> 'a b'
274 * a'b ==> a'\''b ==> 'a'\''b'
275 * a!b ==> a'\!'b ==> 'a'\!'b'
276 */
277
278 static size_t
279 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
280 {
281 char c;
282
283 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
284
285 BUFPUT('\'');
286 while ((c = *src++)) {
287 if (c == '\'' || c == '!') {
288 BUFPUT('\'');
289 BUFPUT('\\');
290 BUFPUT(c);
291 BUFPUT('\'');
292 } else {
293 BUFPUT(c);
294 }
295 }
296 BUFPUT('\'');
297
298 if (bufsize < SIZEOF_STR)
299 buf[bufsize] = 0;
300
301 return bufsize;
302 }
303
304
305 /*
306 * User requests
307 */
308
309 #define REQ_INFO \
310 /* XXX: Keep the view request first and in sync with views[]. */ \
311 REQ_GROUP("View switching") \
312 REQ_(VIEW_MAIN, "Show main view"), \
313 REQ_(VIEW_DIFF, "Show diff view"), \
314 REQ_(VIEW_LOG, "Show log view"), \
315 REQ_(VIEW_TREE, "Show tree view"), \
316 REQ_(VIEW_BLOB, "Show blob view"), \
317 REQ_(VIEW_HELP, "Show help page"), \
318 REQ_(VIEW_PAGER, "Show pager view"), \
319 REQ_(VIEW_STATUS, "Show status view"), \
320 REQ_(VIEW_STAGE, "Show stage view"), \
321 \
322 REQ_GROUP("View manipulation") \
323 REQ_(ENTER, "Enter current line and scroll"), \
324 REQ_(NEXT, "Move to next"), \
325 REQ_(PREVIOUS, "Move to previous"), \
326 REQ_(VIEW_NEXT, "Move focus to next view"), \
327 REQ_(REFRESH, "Reload and refresh"), \
328 REQ_(VIEW_CLOSE, "Close the current view"), \
329 REQ_(QUIT, "Close all views and quit"), \
330 \
331 REQ_GROUP("Cursor navigation") \
332 REQ_(MOVE_UP, "Move cursor one line up"), \
333 REQ_(MOVE_DOWN, "Move cursor one line down"), \
334 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
335 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
336 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
337 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
338 \
339 REQ_GROUP("Scrolling") \
340 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
341 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
342 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
343 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
344 \
345 REQ_GROUP("Searching") \
346 REQ_(SEARCH, "Search the view"), \
347 REQ_(SEARCH_BACK, "Search backwards in the view"), \
348 REQ_(FIND_NEXT, "Find next search match"), \
349 REQ_(FIND_PREV, "Find previous search match"), \
350 \
351 REQ_GROUP("Misc") \
352 REQ_(PROMPT, "Bring up the prompt"), \
353 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
354 REQ_(SCREEN_RESIZE, "Resize the screen"), \
355 REQ_(SHOW_VERSION, "Show version information"), \
356 REQ_(STOP_LOADING, "Stop all loading views"), \
357 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
358 REQ_(TOGGLE_DATE, "Toggle date display"), \
359 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
360 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
361 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
362 REQ_(STATUS_UPDATE, "Update file status"), \
363 REQ_(STATUS_MERGE, "Merge file using external tool"), \
364 REQ_(TREE_PARENT, "Switch to parent directory in tree view"), \
365 REQ_(EDIT, "Open in editor"), \
366 REQ_(NONE, "Do nothing")
367
368
369 /* User action requests. */
370 enum request {
371 #define REQ_GROUP(help)
372 #define REQ_(req, help) REQ_##req
373
374 /* Offset all requests to avoid conflicts with ncurses getch values. */
375 REQ_OFFSET = KEY_MAX + 1,
376 REQ_INFO
377
378 #undef REQ_GROUP
379 #undef REQ_
380 };
381
382 struct request_info {
383 enum request request;
384 char *name;
385 int namelen;
386 char *help;
387 };
388
389 static struct request_info req_info[] = {
390 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
391 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
392 REQ_INFO
393 #undef REQ_GROUP
394 #undef REQ_
395 };
396
397 static enum request
398 get_request(const char *name)
399 {
400 int namelen = strlen(name);
401 int i;
402
403 for (i = 0; i < ARRAY_SIZE(req_info); i++)
404 if (req_info[i].namelen == namelen &&
405 !string_enum_compare(req_info[i].name, name, namelen))
406 return req_info[i].request;
407
408 return REQ_NONE;
409 }
410
411
412 /*
413 * Options
414 */
415
416 static const char usage[] =
417 "tig " TIG_VERSION " (" __DATE__ ")\n"
418 "\n"
419 "Usage: tig [options] [revs] [--] [paths]\n"
420 " or: tig show [options] [revs] [--] [paths]\n"
421 " or: tig status\n"
422 " or: tig < [git command output]\n"
423 "\n"
424 "Options:\n"
425 " -v, --version Show version and exit\n"
426 " -h, --help Show help message and exit\n";
427
428 /* Option and state variables. */
429 static bool opt_date = TRUE;
430 static bool opt_author = TRUE;
431 static bool opt_line_number = FALSE;
432 static bool opt_rev_graph = FALSE;
433 static bool opt_show_refs = TRUE;
434 static int opt_num_interval = NUMBER_INTERVAL;
435 static int opt_tab_size = TABSIZE;
436 static enum request opt_request = REQ_VIEW_MAIN;
437 static char opt_cmd[SIZEOF_STR] = "";
438 static char opt_path[SIZEOF_STR] = "";
439 static FILE *opt_pipe = NULL;
440 static char opt_encoding[20] = "UTF-8";
441 static bool opt_utf8 = TRUE;
442 static char opt_codeset[20] = "UTF-8";
443 static iconv_t opt_iconv = ICONV_NONE;
444 static char opt_search[SIZEOF_STR] = "";
445 static char opt_cdup[SIZEOF_STR] = "";
446 static char opt_git_dir[SIZEOF_STR] = "";
447 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
448 static char opt_editor[SIZEOF_STR] = "";
449
450 enum option_type {
451 OPT_NONE,
452 OPT_INT,
453 };
454
455 static bool
456 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
457 {
458 va_list args;
459 char *value = "";
460 int *number;
461
462 if (opt[0] != '-')
463 return FALSE;
464
465 if (opt[1] == '-') {
466 int namelen = strlen(name);
467
468 opt += 2;
469
470 if (strncmp(opt, name, namelen))
471 return FALSE;
472
473 if (opt[namelen] == '=')
474 value = opt + namelen + 1;
475
476 } else {
477 if (!short_name || opt[1] != short_name)
478 return FALSE;
479 value = opt + 2;
480 }
481
482 va_start(args, type);
483 if (type == OPT_INT) {
484 number = va_arg(args, int *);
485 if (isdigit(*value))
486 *number = atoi(value);
487 }
488 va_end(args);
489
490 return TRUE;
491 }
492
493 /* Returns the index of log or diff command or -1 to exit. */
494 static bool
495 parse_options(int argc, char *argv[])
496 {
497 char *altargv[1024];
498 int altargc = 0;
499 char *subcommand = NULL;
500 int i;
501
502 for (i = 1; i < argc; i++) {
503 char *opt = argv[i];
504
505 if (!strcmp(opt, "log") ||
506 !strcmp(opt, "diff")) {
507 subcommand = opt;
508 opt_request = opt[0] == 'l'
509 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
510 warn("`tig %s' has been deprecated", opt);
511 break;
512 }
513
514 if (!strcmp(opt, "show")) {
515 subcommand = opt;
516 opt_request = REQ_VIEW_DIFF;
517 break;
518 }
519
520 if (!strcmp(opt, "status")) {
521 subcommand = opt;
522 opt_request = REQ_VIEW_STATUS;
523 break;
524 }
525
526 if (opt[0] && opt[0] != '-')
527 break;
528
529 if (!strcmp(opt, "--")) {
530 i++;
531 break;
532 }
533
534 if (check_option(opt, 'v', "version", OPT_NONE)) {
535 printf("tig version %s\n", TIG_VERSION);
536 return FALSE;
537 }
538
539 if (check_option(opt, 'h', "help", OPT_NONE)) {
540 printf(usage);
541 return FALSE;
542 }
543
544 if (!strcmp(opt, "-S")) {
545 warn("`%s' has been deprecated; use `tig status' instead", opt);
546 opt_request = REQ_VIEW_STATUS;
547 continue;
548 }
549
550 if (!strcmp(opt, "-l")) {
551 opt_request = REQ_VIEW_LOG;
552 } else if (!strcmp(opt, "-d")) {
553 opt_request = REQ_VIEW_DIFF;
554 } else if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
555 opt_line_number = TRUE;
556 } else if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
557 opt_tab_size = MIN(opt_tab_size, TABSIZE);
558 } else {
559 if (altargc >= ARRAY_SIZE(altargv))
560 die("maximum number of arguments exceeded");
561 altargv[altargc++] = opt;
562 continue;
563 }
564
565 warn("`%s' has been deprecated", opt);
566 }
567
568 /* Check that no 'alt' arguments occured before a subcommand. */
569 if (subcommand && i < argc && altargc > 0)
570 die("unknown arguments before `%s'", argv[i]);
571
572 if (!isatty(STDIN_FILENO)) {
573 opt_request = REQ_VIEW_PAGER;
574 opt_pipe = stdin;
575
576 } else if (opt_request == REQ_VIEW_STATUS) {
577 if (argc - i > 1)
578 warn("ignoring arguments after `%s'", argv[i]);
579
580 } else if (i < argc || altargc > 0) {
581 int alti = 0;
582 size_t buf_size;
583
584 if (opt_request == REQ_VIEW_MAIN)
585 /* XXX: This is vulnerable to the user overriding
586 * options required for the main view parser. */
587 string_copy(opt_cmd, "git log --no-color --pretty=raw --boundary --parents");
588 else
589 string_copy(opt_cmd, "git");
590 buf_size = strlen(opt_cmd);
591
592 while (buf_size < sizeof(opt_cmd) && alti < altargc) {
593 opt_cmd[buf_size++] = ' ';
594 buf_size = sq_quote(opt_cmd, buf_size, altargv[alti++]);
595 }
596
597 while (buf_size < sizeof(opt_cmd) && i < argc) {
598 opt_cmd[buf_size++] = ' ';
599 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
600 }
601
602 if (buf_size >= sizeof(opt_cmd))
603 die("command too long");
604
605 opt_cmd[buf_size] = 0;
606 }
607
608 return TRUE;
609 }
610
611
612 /*
613 * Line-oriented content detection.
614 */
615
616 #define LINE_INFO \
617 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
618 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
619 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
620 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
621 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
622 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
623 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
624 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
625 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
626 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
627 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
628 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
629 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
630 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
631 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
632 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
633 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
634 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
635 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
636 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
637 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
638 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
639 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
640 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
641 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
642 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
643 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
644 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
645 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
646 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
647 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
648 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
649 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
650 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
651 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
652 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
653 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
654 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
655 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
656 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
657 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
658 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
659 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
660 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
661 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
662 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
663 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
664 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
665 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0)
666
667 enum line_type {
668 #define LINE(type, line, fg, bg, attr) \
669 LINE_##type
670 LINE_INFO
671 #undef LINE
672 };
673
674 struct line_info {
675 const char *name; /* Option name. */
676 int namelen; /* Size of option name. */
677 const char *line; /* The start of line to match. */
678 int linelen; /* Size of string to match. */
679 int fg, bg, attr; /* Color and text attributes for the lines. */
680 };
681
682 static struct line_info line_info[] = {
683 #define LINE(type, line, fg, bg, attr) \
684 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
685 LINE_INFO
686 #undef LINE
687 };
688
689 static enum line_type
690 get_line_type(char *line)
691 {
692 int linelen = strlen(line);
693 enum line_type type;
694
695 for (type = 0; type < ARRAY_SIZE(line_info); type++)
696 /* Case insensitive search matches Signed-off-by lines better. */
697 if (linelen >= line_info[type].linelen &&
698 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
699 return type;
700
701 return LINE_DEFAULT;
702 }
703
704 static inline int
705 get_line_attr(enum line_type type)
706 {
707 assert(type < ARRAY_SIZE(line_info));
708 return COLOR_PAIR(type) | line_info[type].attr;
709 }
710
711 static struct line_info *
712 get_line_info(char *name, int namelen)
713 {
714 enum line_type type;
715
716 for (type = 0; type < ARRAY_SIZE(line_info); type++)
717 if (namelen == line_info[type].namelen &&
718 !string_enum_compare(line_info[type].name, name, namelen))
719 return &line_info[type];
720
721 return NULL;
722 }
723
724 static void
725 init_colors(void)
726 {
727 int default_bg = line_info[LINE_DEFAULT].bg;
728 int default_fg = line_info[LINE_DEFAULT].fg;
729 enum line_type type;
730
731 start_color();
732
733 if (assume_default_colors(default_fg, default_bg) == ERR) {
734 default_bg = COLOR_BLACK;
735 default_fg = COLOR_WHITE;
736 }
737
738 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
739 struct line_info *info = &line_info[type];
740 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
741 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
742
743 init_pair(type, fg, bg);
744 }
745 }
746
747 struct line {
748 enum line_type type;
749
750 /* State flags */
751 unsigned int selected:1;
752
753 void *data; /* User data */
754 };
755
756
757 /*
758 * Keys
759 */
760
761 struct keybinding {
762 int alias;
763 enum request request;
764 struct keybinding *next;
765 };
766
767 static struct keybinding default_keybindings[] = {
768 /* View switching */
769 { 'm', REQ_VIEW_MAIN },
770 { 'd', REQ_VIEW_DIFF },
771 { 'l', REQ_VIEW_LOG },
772 { 't', REQ_VIEW_TREE },
773 { 'f', REQ_VIEW_BLOB },
774 { 'p', REQ_VIEW_PAGER },
775 { 'h', REQ_VIEW_HELP },
776 { 'S', REQ_VIEW_STATUS },
777 { 'c', REQ_VIEW_STAGE },
778
779 /* View manipulation */
780 { 'q', REQ_VIEW_CLOSE },
781 { KEY_TAB, REQ_VIEW_NEXT },
782 { KEY_RETURN, REQ_ENTER },
783 { KEY_UP, REQ_PREVIOUS },
784 { KEY_DOWN, REQ_NEXT },
785 { 'R', REQ_REFRESH },
786
787 /* Cursor navigation */
788 { 'k', REQ_MOVE_UP },
789 { 'j', REQ_MOVE_DOWN },
790 { KEY_HOME, REQ_MOVE_FIRST_LINE },
791 { KEY_END, REQ_MOVE_LAST_LINE },
792 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
793 { ' ', REQ_MOVE_PAGE_DOWN },
794 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
795 { 'b', REQ_MOVE_PAGE_UP },
796 { '-', REQ_MOVE_PAGE_UP },
797
798 /* Scrolling */
799 { KEY_IC, REQ_SCROLL_LINE_UP },
800 { KEY_DC, REQ_SCROLL_LINE_DOWN },
801 { 'w', REQ_SCROLL_PAGE_UP },
802 { 's', REQ_SCROLL_PAGE_DOWN },
803
804 /* Searching */
805 { '/', REQ_SEARCH },
806 { '?', REQ_SEARCH_BACK },
807 { 'n', REQ_FIND_NEXT },
808 { 'N', REQ_FIND_PREV },
809
810 /* Misc */
811 { 'Q', REQ_QUIT },
812 { 'z', REQ_STOP_LOADING },
813 { 'v', REQ_SHOW_VERSION },
814 { 'r', REQ_SCREEN_REDRAW },
815 { '.', REQ_TOGGLE_LINENO },
816 { 'D', REQ_TOGGLE_DATE },
817 { 'A', REQ_TOGGLE_AUTHOR },
818 { 'g', REQ_TOGGLE_REV_GRAPH },
819 { 'F', REQ_TOGGLE_REFS },
820 { ':', REQ_PROMPT },
821 { 'u', REQ_STATUS_UPDATE },
822 { 'M', REQ_STATUS_MERGE },
823 { ',', REQ_TREE_PARENT },
824 { 'e', REQ_EDIT },
825
826 /* Using the ncurses SIGWINCH handler. */
827 { KEY_RESIZE, REQ_SCREEN_RESIZE },
828 };
829
830 #define KEYMAP_INFO \
831 KEYMAP_(GENERIC), \
832 KEYMAP_(MAIN), \
833 KEYMAP_(DIFF), \
834 KEYMAP_(LOG), \
835 KEYMAP_(TREE), \
836 KEYMAP_(BLOB), \
837 KEYMAP_(PAGER), \
838 KEYMAP_(HELP), \
839 KEYMAP_(STATUS), \
840 KEYMAP_(STAGE)
841
842 enum keymap {
843 #define KEYMAP_(name) KEYMAP_##name
844 KEYMAP_INFO
845 #undef KEYMAP_
846 };
847
848 static struct int_map keymap_table[] = {
849 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
850 KEYMAP_INFO
851 #undef KEYMAP_
852 };
853
854 #define set_keymap(map, name) \
855 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
856
857 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
858
859 static void
860 add_keybinding(enum keymap keymap, enum request request, int key)
861 {
862 struct keybinding *keybinding;
863
864 keybinding = calloc(1, sizeof(*keybinding));
865 if (!keybinding)
866 die("Failed to allocate keybinding");
867
868 keybinding->alias = key;
869 keybinding->request = request;
870 keybinding->next = keybindings[keymap];
871 keybindings[keymap] = keybinding;
872 }
873
874 /* Looks for a key binding first in the given map, then in the generic map, and
875 * lastly in the default keybindings. */
876 static enum request
877 get_keybinding(enum keymap keymap, int key)
878 {
879 struct keybinding *kbd;
880 int i;
881
882 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
883 if (kbd->alias == key)
884 return kbd->request;
885
886 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
887 if (kbd->alias == key)
888 return kbd->request;
889
890 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
891 if (default_keybindings[i].alias == key)
892 return default_keybindings[i].request;
893
894 return (enum request) key;
895 }
896
897
898 struct key {
899 char *name;
900 int value;
901 };
902
903 static struct key key_table[] = {
904 { "Enter", KEY_RETURN },
905 { "Space", ' ' },
906 { "Backspace", KEY_BACKSPACE },
907 { "Tab", KEY_TAB },
908 { "Escape", KEY_ESC },
909 { "Left", KEY_LEFT },
910 { "Right", KEY_RIGHT },
911 { "Up", KEY_UP },
912 { "Down", KEY_DOWN },
913 { "Insert", KEY_IC },
914 { "Delete", KEY_DC },
915 { "Hash", '#' },
916 { "Home", KEY_HOME },
917 { "End", KEY_END },
918 { "PageUp", KEY_PPAGE },
919 { "PageDown", KEY_NPAGE },
920 { "F1", KEY_F(1) },
921 { "F2", KEY_F(2) },
922 { "F3", KEY_F(3) },
923 { "F4", KEY_F(4) },
924 { "F5", KEY_F(5) },
925 { "F6", KEY_F(6) },
926 { "F7", KEY_F(7) },
927 { "F8", KEY_F(8) },
928 { "F9", KEY_F(9) },
929 { "F10", KEY_F(10) },
930 { "F11", KEY_F(11) },
931 { "F12", KEY_F(12) },
932 };
933
934 static int
935 get_key_value(const char *name)
936 {
937 int i;
938
939 for (i = 0; i < ARRAY_SIZE(key_table); i++)
940 if (!strcasecmp(key_table[i].name, name))
941 return key_table[i].value;
942
943 if (strlen(name) == 1 && isprint(*name))
944 return (int) *name;
945
946 return ERR;
947 }
948
949 static char *
950 get_key_name(int key_value)
951 {
952 static char key_char[] = "'X'";
953 char *seq = NULL;
954 int key;
955
956 for (key = 0; key < ARRAY_SIZE(key_table); key++)
957 if (key_table[key].value == key_value)
958 seq = key_table[key].name;
959
960 if (seq == NULL &&
961 key_value < 127 &&
962 isprint(key_value)) {
963 key_char[1] = (char) key_value;
964 seq = key_char;
965 }
966
967 return seq ? seq : "'?'";
968 }
969
970 static char *
971 get_key(enum request request)
972 {
973 static char buf[BUFSIZ];
974 size_t pos = 0;
975 char *sep = "";
976 int i;
977
978 buf[pos] = 0;
979
980 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
981 struct keybinding *keybinding = &default_keybindings[i];
982
983 if (keybinding->request != request)
984 continue;
985
986 if (!string_format_from(buf, &pos, "%s%s", sep,
987 get_key_name(keybinding->alias)))
988 return "Too many keybindings!";
989 sep = ", ";
990 }
991
992 return buf;
993 }
994
995 struct run_request {
996 enum keymap keymap;
997 int key;
998 char cmd[SIZEOF_STR];
999 };
1000
1001 static struct run_request *run_request;
1002 static size_t run_requests;
1003
1004 static enum request
1005 add_run_request(enum keymap keymap, int key, int argc, char **argv)
1006 {
1007 struct run_request *tmp;
1008 struct run_request req = { keymap, key };
1009 size_t bufpos;
1010
1011 for (bufpos = 0; argc > 0; argc--, argv++)
1012 if (!string_format_from(req.cmd, &bufpos, "%s ", *argv))
1013 return REQ_NONE;
1014
1015 req.cmd[bufpos - 1] = 0;
1016
1017 tmp = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1018 if (!tmp)
1019 return REQ_NONE;
1020
1021 run_request = tmp;
1022 run_request[run_requests++] = req;
1023
1024 return REQ_NONE + run_requests;
1025 }
1026
1027 static struct run_request *
1028 get_run_request(enum request request)
1029 {
1030 if (request <= REQ_NONE)
1031 return NULL;
1032 return &run_request[request - REQ_NONE - 1];
1033 }
1034
1035 static void
1036 add_builtin_run_requests(void)
1037 {
1038 struct {
1039 enum keymap keymap;
1040 int key;
1041 char *argv[1];
1042 } reqs[] = {
1043 { KEYMAP_MAIN, 'C', { "git cherry-pick %(commit)" } },
1044 { KEYMAP_GENERIC, 'G', { "git gc" } },
1045 };
1046 int i;
1047
1048 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1049 enum request req;
1050
1051 req = add_run_request(reqs[i].keymap, reqs[i].key, 1, reqs[i].argv);
1052 if (req != REQ_NONE)
1053 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1054 }
1055 }
1056
1057 /*
1058 * User config file handling.
1059 */
1060
1061 static struct int_map color_map[] = {
1062 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
1063 COLOR_MAP(DEFAULT),
1064 COLOR_MAP(BLACK),
1065 COLOR_MAP(BLUE),
1066 COLOR_MAP(CYAN),
1067 COLOR_MAP(GREEN),
1068 COLOR_MAP(MAGENTA),
1069 COLOR_MAP(RED),
1070 COLOR_MAP(WHITE),
1071 COLOR_MAP(YELLOW),
1072 };
1073
1074 #define set_color(color, name) \
1075 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
1076
1077 static struct int_map attr_map[] = {
1078 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
1079 ATTR_MAP(NORMAL),
1080 ATTR_MAP(BLINK),
1081 ATTR_MAP(BOLD),
1082 ATTR_MAP(DIM),
1083 ATTR_MAP(REVERSE),
1084 ATTR_MAP(STANDOUT),
1085 ATTR_MAP(UNDERLINE),
1086 };
1087
1088 #define set_attribute(attr, name) \
1089 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
1090
1091 static int config_lineno;
1092 static bool config_errors;
1093 static char *config_msg;
1094
1095 /* Wants: object fgcolor bgcolor [attr] */
1096 static int
1097 option_color_command(int argc, char *argv[])
1098 {
1099 struct line_info *info;
1100
1101 if (argc != 3 && argc != 4) {
1102 config_msg = "Wrong number of arguments given to color command";
1103 return ERR;
1104 }
1105
1106 info = get_line_info(argv[0], strlen(argv[0]));
1107 if (!info) {
1108 config_msg = "Unknown color name";
1109 return ERR;
1110 }
1111
1112 if (set_color(&info->fg, argv[1]) == ERR ||
1113 set_color(&info->bg, argv[2]) == ERR) {
1114 config_msg = "Unknown color";
1115 return ERR;
1116 }
1117
1118 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1119 config_msg = "Unknown attribute";
1120 return ERR;
1121 }
1122
1123 return OK;
1124 }
1125
1126 static bool parse_bool(const char *s)
1127 {
1128 return (!strcmp(s, "1") || !strcmp(s, "true") ||
1129 !strcmp(s, "yes")) ? TRUE : FALSE;
1130 }
1131
1132 /* Wants: name = value */
1133 static int
1134 option_set_command(int argc, char *argv[])
1135 {
1136 if (argc != 3) {
1137 config_msg = "Wrong number of arguments given to set command";
1138 return ERR;
1139 }
1140
1141 if (strcmp(argv[1], "=")) {
1142 config_msg = "No value assigned";
1143 return ERR;
1144 }
1145
1146 if (!strcmp(argv[0], "show-author")) {
1147 opt_author = parse_bool(argv[2]);
1148 return OK;
1149 }
1150
1151 if (!strcmp(argv[0], "show-date")) {
1152 opt_date = parse_bool(argv[2]);
1153 return OK;
1154 }
1155
1156 if (!strcmp(argv[0], "show-rev-graph")) {
1157 opt_rev_graph = parse_bool(argv[2]);
1158 return OK;
1159 }
1160
1161 if (!strcmp(argv[0], "show-refs")) {
1162 opt_show_refs = parse_bool(argv[2]);
1163 return OK;
1164 }
1165
1166 if (!strcmp(argv[0], "show-line-numbers")) {
1167 opt_line_number = parse_bool(argv[2]);
1168 return OK;
1169 }
1170
1171 if (!strcmp(argv[0], "line-number-interval")) {
1172 opt_num_interval = atoi(argv[2]);
1173 return OK;
1174 }
1175
1176 if (!strcmp(argv[0], "tab-size")) {
1177 opt_tab_size = atoi(argv[2]);
1178 return OK;
1179 }
1180
1181 if (!strcmp(argv[0], "commit-encoding")) {
1182 char *arg = argv[2];
1183 int delimiter = *arg;
1184 int i;
1185
1186 switch (delimiter) {
1187 case '"':
1188 case '\'':
1189 for (arg++, i = 0; arg[i]; i++)
1190 if (arg[i] == delimiter) {
1191 arg[i] = 0;
1192 break;
1193 }
1194 default:
1195 string_ncopy(opt_encoding, arg, strlen(arg));
1196 return OK;
1197 }
1198 }
1199
1200 config_msg = "Unknown variable name";
1201 return ERR;
1202 }
1203
1204 /* Wants: mode request key */
1205 static int
1206 option_bind_command(int argc, char *argv[])
1207 {
1208 enum request request;
1209 int keymap;
1210 int key;
1211
1212 if (argc < 3) {
1213 config_msg = "Wrong number of arguments given to bind command";
1214 return ERR;
1215 }
1216
1217 if (set_keymap(&keymap, argv[0]) == ERR) {
1218 config_msg = "Unknown key map";
1219 return ERR;
1220 }
1221
1222 key = get_key_value(argv[1]);
1223 if (key == ERR) {
1224 config_msg = "Unknown key";
1225 return ERR;
1226 }
1227
1228 request = get_request(argv[2]);
1229 if (request == REQ_NONE) {
1230 const char *obsolete[] = { "cherry-pick" };
1231 size_t namelen = strlen(argv[2]);
1232 int i;
1233
1234 for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
1235 if (namelen == strlen(obsolete[i]) &&
1236 !string_enum_compare(obsolete[i], argv[2], namelen)) {
1237 config_msg = "Obsolete request name";
1238 return ERR;
1239 }
1240 }
1241 }
1242 if (request == REQ_NONE && *argv[2]++ == '!')
1243 request = add_run_request(keymap, key, argc - 2, argv + 2);
1244 if (request == REQ_NONE) {
1245 config_msg = "Unknown request name";
1246 return ERR;
1247 }
1248
1249 add_keybinding(keymap, request, key);
1250
1251 return OK;
1252 }
1253
1254 static int
1255 set_option(char *opt, char *value)
1256 {
1257 char *argv[16];
1258 int valuelen;
1259 int argc = 0;
1260
1261 /* Tokenize */
1262 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1263 argv[argc++] = value;
1264 value += valuelen;
1265
1266 /* Nothing more to tokenize or last available token. */
1267 if (!*value || argc >= ARRAY_SIZE(argv))
1268 break;
1269
1270 *value++ = 0;
1271 while (isspace(*value))
1272 value++;
1273 }
1274
1275 if (!strcmp(opt, "color"))
1276 return option_color_command(argc, argv);
1277
1278 if (!strcmp(opt, "set"))
1279 return option_set_command(argc, argv);
1280
1281 if (!strcmp(opt, "bind"))
1282 return option_bind_command(argc, argv);
1283
1284 config_msg = "Unknown option command";
1285 return ERR;
1286 }
1287
1288 static int
1289 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1290 {
1291 int status = OK;
1292
1293 config_lineno++;
1294 config_msg = "Internal error";
1295
1296 /* Check for comment markers, since read_properties() will
1297 * only ensure opt and value are split at first " \t". */
1298 optlen = strcspn(opt, "#");
1299 if (optlen == 0)
1300 return OK;
1301
1302 if (opt[optlen] != 0) {
1303 config_msg = "No option value";
1304 status = ERR;
1305
1306 } else {
1307 /* Look for comment endings in the value. */
1308 size_t len = strcspn(value, "#");
1309
1310 if (len < valuelen) {
1311 valuelen = len;
1312 value[valuelen] = 0;
1313 }
1314
1315 status = set_option(opt, value);
1316 }
1317
1318 if (status == ERR) {
1319 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1320 config_lineno, (int) optlen, opt, config_msg);
1321 config_errors = TRUE;
1322 }
1323
1324 /* Always keep going if errors are encountered. */
1325 return OK;
1326 }
1327
1328 static void
1329 load_option_file(const char *path)
1330 {
1331 FILE *file;
1332
1333 /* It's ok that the file doesn't exist. */
1334 file = fopen(path, "r");
1335 if (!file)
1336 return;
1337
1338 config_lineno = 0;
1339 config_errors = FALSE;
1340
1341 if (read_properties(file, " \t", read_option) == ERR ||
1342 config_errors == TRUE)
1343 fprintf(stderr, "Errors while loading %s.\n", path);
1344 }
1345
1346 static int
1347 load_options(void)
1348 {
1349 char *home = getenv("HOME");
1350 char *tigrc_user = getenv("TIGRC_USER");
1351 char *tigrc_system = getenv("TIGRC_SYSTEM");
1352 char buf[SIZEOF_STR];
1353
1354 add_builtin_run_requests();
1355
1356 if (!tigrc_system) {
1357 if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
1358 return ERR;
1359 tigrc_system = buf;
1360 }
1361 load_option_file(tigrc_system);
1362
1363 if (!tigrc_user) {
1364 if (!home || !string_format(buf, "%s/.tigrc", home))
1365 return ERR;
1366 tigrc_user = buf;
1367 }
1368 load_option_file(tigrc_user);
1369
1370 return OK;
1371 }
1372
1373
1374 /*
1375 * The viewer
1376 */
1377
1378 struct view;
1379 struct view_ops;
1380
1381 /* The display array of active views and the index of the current view. */
1382 static struct view *display[2];
1383 static unsigned int current_view;
1384
1385 /* Reading from the prompt? */
1386 static bool input_mode = FALSE;
1387
1388 #define foreach_displayed_view(view, i) \
1389 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1390
1391 #define displayed_views() (display[1] != NULL ? 2 : 1)
1392
1393 /* Current head and commit ID */
1394 static char ref_blob[SIZEOF_REF] = "";
1395 static char ref_commit[SIZEOF_REF] = "HEAD";
1396 static char ref_head[SIZEOF_REF] = "HEAD";
1397
1398 struct view {
1399 const char *name; /* View name */
1400 const char *cmd_fmt; /* Default command line format */
1401 const char *cmd_env; /* Command line set via environment */
1402 const char *id; /* Points to either of ref_{head,commit,blob} */
1403
1404 struct view_ops *ops; /* View operations */
1405
1406 enum keymap keymap; /* What keymap does this view have */
1407
1408 char cmd[SIZEOF_STR]; /* Command buffer */
1409 char ref[SIZEOF_REF]; /* Hovered commit reference */
1410 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1411
1412 int height, width; /* The width and height of the main window */
1413 WINDOW *win; /* The main window */
1414 WINDOW *title; /* The title window living below the main window */
1415
1416 /* Navigation */
1417 unsigned long offset; /* Offset of the window top */
1418 unsigned long lineno; /* Current line number */
1419
1420 /* Searching */
1421 char grep[SIZEOF_STR]; /* Search string */
1422 regex_t *regex; /* Pre-compiled regex */
1423
1424 /* If non-NULL, points to the view that opened this view. If this view
1425 * is closed tig will switch back to the parent view. */
1426 struct view *parent;
1427
1428 /* Buffering */
1429 size_t lines; /* Total number of lines */
1430 struct line *line; /* Line index */
1431 size_t line_alloc; /* Total number of allocated lines */
1432 size_t line_size; /* Total number of used lines */
1433 unsigned int digits; /* Number of digits in the lines member. */
1434
1435 /* Loading */
1436 FILE *pipe;
1437 time_t start_time;
1438 };
1439
1440 struct view_ops {
1441 /* What type of content being displayed. Used in the title bar. */
1442 const char *type;
1443 /* Open and reads in all view content. */
1444 bool (*open)(struct view *view);
1445 /* Read one line; updates view->line. */
1446 bool (*read)(struct view *view, char *data);
1447 /* Draw one line; @lineno must be < view->height. */
1448 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1449 /* Depending on view handle a special requests. */
1450 enum request (*request)(struct view *view, enum request request, struct line *line);
1451 /* Search for regex in a line. */
1452 bool (*grep)(struct view *view, struct line *line);
1453 /* Select line */
1454 void (*select)(struct view *view, struct line *line);
1455 };
1456
1457 static struct view_ops pager_ops;
1458 static struct view_ops main_ops;
1459 static struct view_ops tree_ops;
1460 static struct view_ops blob_ops;
1461 static struct view_ops help_ops;
1462 static struct view_ops status_ops;
1463 static struct view_ops stage_ops;
1464
1465 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1466 { name, cmd, #env, ref, ops, map}
1467
1468 #define VIEW_(id, name, ops, ref) \
1469 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1470
1471
1472 static struct view views[] = {
1473 VIEW_(MAIN, "main", &main_ops, ref_head),
1474 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1475 VIEW_(LOG, "log", &pager_ops, ref_head),
1476 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1477 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1478 VIEW_(HELP, "help", &help_ops, ""),
1479 VIEW_(PAGER, "pager", &pager_ops, "stdin"),
1480 VIEW_(STATUS, "status", &status_ops, ""),
1481 VIEW_(STAGE, "stage", &stage_ops, ""),
1482 };
1483
1484 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1485
1486 #define foreach_view(view, i) \
1487 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1488
1489 #define view_is_displayed(view) \
1490 (view == display[0] || view == display[1])
1491
1492 static int
1493 draw_text(struct view *view, const char *string, int max_len,
1494 bool use_tilde, int tilde_attr)
1495 {
1496 int len = 0;
1497 int trimmed = FALSE;
1498
1499 if (max_len <= 0)
1500 return 0;
1501
1502 if (opt_utf8) {
1503 len = utf8_length(string, max_len, &trimmed, use_tilde);
1504 } else {
1505 len = strlen(string);
1506 if (len > max_len) {
1507 if (use_tilde) {
1508 max_len -= 1;
1509 }
1510 len = max_len;
1511 trimmed = TRUE;
1512 }
1513 }
1514
1515 waddnstr(view->win, string, len);
1516 if (trimmed && use_tilde) {
1517 if (tilde_attr != -1)
1518 wattrset(view->win, tilde_attr);
1519 waddch(view->win, '~');
1520 len++;
1521 }
1522
1523 return len;
1524 }
1525
1526 static bool
1527 draw_view_line(struct view *view, unsigned int lineno)
1528 {
1529 struct line *line;
1530 bool selected = (view->offset + lineno == view->lineno);
1531 bool draw_ok;
1532
1533 assert(view_is_displayed(view));
1534
1535 if (view->offset + lineno >= view->lines)
1536 return FALSE;
1537
1538 line = &view->line[view->offset + lineno];
1539
1540 if (selected) {
1541 line->selected = TRUE;
1542 view->ops->select(view, line);
1543 } else if (line->selected) {
1544 line->selected = FALSE;
1545 wmove(view->win, lineno, 0);
1546 wclrtoeol(view->win);
1547 }
1548
1549 scrollok(view->win, FALSE);
1550 draw_ok = view->ops->draw(view, line, lineno, selected);
1551 scrollok(view->win, TRUE);
1552
1553 return draw_ok;
1554 }
1555
1556 static void
1557 redraw_view_from(struct view *view, int lineno)
1558 {
1559 assert(0 <= lineno && lineno < view->height);
1560
1561 for (; lineno < view->height; lineno++) {
1562 if (!draw_view_line(view, lineno))
1563 break;
1564 }
1565
1566 redrawwin(view->win);
1567 if (input_mode)
1568 wnoutrefresh(view->win);
1569 else
1570 wrefresh(view->win);
1571 }
1572
1573 static void
1574 redraw_view(struct view *view)
1575 {
1576 wclear(view->win);
1577 redraw_view_from(view, 0);
1578 }
1579
1580
1581 static void
1582 update_view_title(struct view *view)
1583 {
1584 char buf[SIZEOF_STR];
1585 char state[SIZEOF_STR];
1586 size_t bufpos = 0, statelen = 0;
1587
1588 assert(view_is_displayed(view));
1589
1590 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1591 unsigned int view_lines = view->offset + view->height;
1592 unsigned int lines = view->lines
1593 ? MIN(view_lines, view->lines) * 100 / view->lines
1594 : 0;
1595
1596 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1597 view->ops->type,
1598 view->lineno + 1,
1599 view->lines,
1600 lines);
1601
1602 if (view->pipe) {
1603 time_t secs = time(NULL) - view->start_time;
1604
1605 /* Three git seconds are a long time ... */
1606 if (secs > 2)
1607 string_format_from(state, &statelen, " %lds", secs);
1608 }
1609 }
1610
1611 string_format_from(buf, &bufpos, "[%s]", view->name);
1612 if (*view->ref && bufpos < view->width) {
1613 size_t refsize = strlen(view->ref);
1614 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1615
1616 if (minsize < view->width)
1617 refsize = view->width - minsize + 7;
1618 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1619 }
1620
1621 if (statelen && bufpos < view->width) {
1622 string_format_from(buf, &bufpos, " %s", state);
1623 }
1624
1625 if (view == display[current_view])
1626 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1627 else
1628 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1629
1630 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1631 wclrtoeol(view->title);
1632 wmove(view->title, 0, view->width - 1);
1633
1634 if (input_mode)
1635 wnoutrefresh(view->title);
1636 else
1637 wrefresh(view->title);
1638 }
1639
1640 static void
1641 resize_display(void)
1642 {
1643 int offset, i;
1644 struct view *base = display[0];
1645 struct view *view = display[1] ? display[1] : display[0];
1646
1647 /* Setup window dimensions */
1648
1649 getmaxyx(stdscr, base->height, base->width);
1650
1651 /* Make room for the status window. */
1652 base->height -= 1;
1653
1654 if (view != base) {
1655 /* Horizontal split. */
1656 view->width = base->width;
1657 view->height = SCALE_SPLIT_VIEW(base->height);
1658 base->height -= view->height;
1659
1660 /* Make room for the title bar. */
1661 view->height -= 1;
1662 }
1663
1664 /* Make room for the title bar. */
1665 base->height -= 1;
1666
1667 offset = 0;
1668
1669 foreach_displayed_view (view, i) {
1670 if (!view->win) {
1671 view->win = newwin(view->height, 0, offset, 0);
1672 if (!view->win)
1673 die("Failed to create %s view", view->name);
1674
1675 scrollok(view->win, TRUE);
1676
1677 view->title = newwin(1, 0, offset + view->height, 0);
1678 if (!view->title)
1679 die("Failed to create title window");
1680
1681 } else {
1682 wresize(view->win, view->height, view->width);
1683 mvwin(view->win, offset, 0);
1684 mvwin(view->title, offset + view->height, 0);
1685 }
1686
1687 offset += view->height + 1;
1688 }
1689 }
1690
1691 static void
1692 redraw_display(void)
1693 {
1694 struct view *view;
1695 int i;
1696
1697 foreach_displayed_view (view, i) {
1698 redraw_view(view);
1699 update_view_title(view);
1700 }
1701 }
1702
1703 static void
1704 update_display_cursor(struct view *view)
1705 {
1706 /* Move the cursor to the right-most column of the cursor line.
1707 *
1708 * XXX: This could turn out to be a bit expensive, but it ensures that
1709 * the cursor does not jump around. */
1710 if (view->lines) {
1711 wmove(view->win, view->lineno - view->offset, view->width - 1);
1712 wrefresh(view->win);
1713 }
1714 }
1715
1716 /*
1717 * Navigation
1718 */
1719
1720 /* Scrolling backend */
1721 static void
1722 do_scroll_view(struct view *view, int lines)
1723 {
1724 bool redraw_current_line = FALSE;
1725
1726 /* The rendering expects the new offset. */
1727 view->offset += lines;
1728
1729 assert(0 <= view->offset && view->offset < view->lines);
1730 assert(lines);
1731
1732 /* Move current line into the view. */
1733 if (view->lineno < view->offset) {
1734 view->lineno = view->offset;
1735 redraw_current_line = TRUE;
1736 } else if (view->lineno >= view->offset + view->height) {
1737 view->lineno = view->offset + view->height - 1;
1738 redraw_current_line = TRUE;
1739 }
1740
1741 assert(view->offset <= view->lineno && view->lineno < view->lines);
1742
1743 /* Redraw the whole screen if scrolling is pointless. */
1744 if (view->height < ABS(lines)) {
1745 redraw_view(view);
1746
1747 } else {
1748 int line = lines > 0 ? view->height - lines : 0;
1749 int end = line + ABS(lines);
1750
1751 wscrl(view->win, lines);
1752
1753 for (; line < end; line++) {
1754 if (!draw_view_line(view, line))
1755 break;
1756 }
1757
1758 if (redraw_current_line)
1759 draw_view_line(view, view->lineno - view->offset);
1760 }
1761
1762 redrawwin(view->win);
1763 wrefresh(view->win);
1764 report("");
1765 }
1766
1767 /* Scroll frontend */
1768 static void
1769 scroll_view(struct view *view, enum request request)
1770 {
1771 int lines = 1;
1772
1773 assert(view_is_displayed(view));
1774
1775 switch (request) {
1776 case REQ_SCROLL_PAGE_DOWN:
1777 lines = view->height;
1778 case REQ_SCROLL_LINE_DOWN:
1779 if (view->offset + lines > view->lines)
1780 lines = view->lines - view->offset;
1781
1782 if (lines == 0 || view->offset + view->height >= view->lines) {
1783 report("Cannot scroll beyond the last line");
1784 return;
1785 }
1786 break;
1787
1788 case REQ_SCROLL_PAGE_UP:
1789 lines = view->height;
1790 case REQ_SCROLL_LINE_UP:
1791 if (lines > view->offset)
1792 lines = view->offset;
1793
1794 if (lines == 0) {
1795 report("Cannot scroll beyond the first line");
1796 return;
1797 }
1798
1799 lines = -lines;
1800 break;
1801
1802 default:
1803 die("request %d not handled in switch", request);
1804 }
1805
1806 do_scroll_view(view, lines);
1807 }
1808
1809 /* Cursor moving */
1810 static void
1811 move_view(struct view *view, enum request request)
1812 {
1813 int scroll_steps = 0;
1814 int steps;
1815
1816 switch (request) {
1817 case REQ_MOVE_FIRST_LINE:
1818 steps = -view->lineno;
1819 break;
1820
1821 case REQ_MOVE_LAST_LINE:
1822 steps = view->lines - view->lineno - 1;
1823 break;
1824
1825 case REQ_MOVE_PAGE_UP:
1826 steps = view->height > view->lineno
1827 ? -view->lineno : -view->height;
1828 break;
1829
1830 case REQ_MOVE_PAGE_DOWN:
1831 steps = view->lineno + view->height >= view->lines
1832 ? view->lines - view->lineno - 1 : view->height;
1833 break;
1834
1835 case REQ_MOVE_UP:
1836 steps = -1;
1837 break;
1838
1839 case REQ_MOVE_DOWN:
1840 steps = 1;
1841 break;
1842
1843 default:
1844 die("request %d not handled in switch", request);
1845 }
1846
1847 if (steps <= 0 && view->lineno == 0) {
1848 report("Cannot move beyond the first line");
1849 return;
1850
1851 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1852 report("Cannot move beyond the last line");
1853 return;
1854 }
1855
1856 /* Move the current line */
1857 view->lineno += steps;
1858 assert(0 <= view->lineno && view->lineno < view->lines);
1859
1860 /* Check whether the view needs to be scrolled */
1861 if (view->lineno < view->offset ||
1862 view->lineno >= view->offset + view->height) {
1863 scroll_steps = steps;
1864 if (steps < 0 && -steps > view->offset) {
1865 scroll_steps = -view->offset;
1866
1867 } else if (steps > 0) {
1868 if (view->lineno == view->lines - 1 &&
1869 view->lines > view->height) {
1870 scroll_steps = view->lines - view->offset - 1;
1871 if (scroll_steps >= view->height)
1872 scroll_steps -= view->height - 1;
1873 }
1874 }
1875 }
1876
1877 if (!view_is_displayed(view)) {
1878 view->offset += scroll_steps;
1879 assert(0 <= view->offset && view->offset < view->lines);
1880 view->ops->select(view, &view->line[view->lineno]);
1881 return;
1882 }
1883
1884 /* Repaint the old "current" line if we be scrolling */
1885 if (ABS(steps) < view->height)
1886 draw_view_line(view, view->lineno - steps - view->offset);
1887
1888 if (scroll_steps) {
1889 do_scroll_view(view, scroll_steps);
1890 return;
1891 }
1892
1893 /* Draw the current line */
1894 draw_view_line(view, view->lineno - view->offset);
1895
1896 redrawwin(view->win);
1897 wrefresh(view->win);
1898 report("");
1899 }
1900
1901
1902 /*
1903 * Searching
1904 */
1905
1906 static void search_view(struct view *view, enum request request);
1907
1908 static bool
1909 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1910 {
1911 assert(view_is_displayed(view));
1912
1913 if (!view->ops->grep(view, line))
1914 return FALSE;
1915
1916 if (lineno - view->offset >= view->height) {
1917 view->offset = lineno;
1918 view->lineno = lineno;
1919 redraw_view(view);
1920
1921 } else {
1922 unsigned long old_lineno = view->lineno - view->offset;
1923
1924 view->lineno = lineno;
1925 draw_view_line(view, old_lineno);
1926
1927 draw_view_line(view, view->lineno - view->offset);
1928 redrawwin(view->win);
1929 wrefresh(view->win);
1930 }
1931
1932 report("Line %ld matches '%s'", lineno + 1, view->grep);
1933 return TRUE;
1934 }
1935
1936 static void
1937 find_next(struct view *view, enum request request)
1938 {
1939 unsigned long lineno = view->lineno;
1940 int direction;
1941
1942 if (!*view->grep) {
1943 if (!*opt_search)
1944 report("No previous search");
1945 else
1946 search_view(view, request);
1947 return;
1948 }
1949
1950 switch (request) {
1951 case REQ_SEARCH:
1952 case REQ_FIND_NEXT:
1953 direction = 1;
1954 break;
1955
1956 case REQ_SEARCH_BACK:
1957 case REQ_FIND_PREV:
1958 direction = -1;
1959 break;
1960
1961 default:
1962 return;
1963 }
1964
1965 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1966 lineno += direction;
1967
1968 /* Note, lineno is unsigned long so will wrap around in which case it
1969 * will become bigger than view->lines. */
1970 for (; lineno < view->lines; lineno += direction) {
1971 struct line *line = &view->line[lineno];
1972
1973 if (find_next_line(view, lineno, line))
1974 return;
1975 }
1976
1977 report("No match found for '%s'", view->grep);
1978 }
1979
1980 static void
1981 search_view(struct view *view, enum request request)
1982 {
1983 int regex_err;
1984
1985 if (view->regex) {
1986 regfree(view->regex);
1987 *view->grep = 0;
1988 } else {
1989 view->regex = calloc(1, sizeof(*view->regex));
1990 if (!view->regex)
1991 return;
1992 }
1993
1994 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1995 if (regex_err != 0) {
1996 char buf[SIZEOF_STR] = "unknown error";
1997
1998 regerror(regex_err, view->regex, buf, sizeof(buf));
1999 report("Search failed: %s", buf);
2000 return;
2001 }
2002
2003 string_copy(view->grep, opt_search);
2004
2005 find_next(view, request);
2006 }
2007
2008 /*
2009 * Incremental updating
2010 */
2011
2012 static void
2013 end_update(struct view *view)
2014 {
2015 if (!view->pipe)
2016 return;
2017 set_nonblocking_input(FALSE);
2018 if (view->pipe == stdin)
2019 fclose(view->pipe);
2020 else
2021 pclose(view->pipe);
2022 view->pipe = NULL;
2023 }
2024
2025 static bool
2026 begin_update(struct view *view)
2027 {
2028 if (view->pipe)
2029 end_update(view);
2030
2031 if (opt_cmd[0]) {
2032 string_copy(view->cmd, opt_cmd);
2033 opt_cmd[0] = 0;
2034 /* When running random commands, initially show the
2035 * command in the title. However, it maybe later be
2036 * overwritten if a commit line is selected. */
2037 if (view == VIEW(REQ_VIEW_PAGER))
2038 string_copy(view->ref, view->cmd);
2039 else
2040 view->ref[0] = 0;
2041
2042 } else if (view == VIEW(REQ_VIEW_TREE)) {
2043 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2044 char path[SIZEOF_STR];
2045
2046 if (strcmp(view->vid, view->id))
2047 opt_path[0] = path[0] = 0;
2048 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
2049 return FALSE;
2050
2051 if (!string_format(view->cmd, format, view->id, path))
2052 return FALSE;
2053
2054 } else {
2055 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2056 const char *id = view->id;
2057
2058 if (!string_format(view->cmd, format, id, id, id, id, id))
2059 return FALSE;
2060
2061 /* Put the current ref_* value to the view title ref
2062 * member. This is needed by the blob view. Most other
2063 * views sets it automatically after loading because the
2064 * first line is a commit line. */
2065 string_copy_rev(view->ref, view->id);
2066 }
2067
2068 /* Special case for the pager view. */
2069 if (opt_pipe) {
2070 view->pipe = opt_pipe;
2071 opt_pipe = NULL;
2072 } else {
2073 view->pipe = popen(view->cmd, "r");
2074 }
2075
2076 if (!view->pipe)
2077 return FALSE;
2078
2079 set_nonblocking_input(TRUE);
2080
2081 view->offset = 0;
2082 view->lines = 0;
2083 view->lineno = 0;
2084 string_copy_rev(view->vid, view->id);
2085
2086 if (view->line) {
2087 int i;
2088
2089 for (i = 0; i < view->lines; i++)
2090 if (view->line[i].data)
2091 free(view->line[i].data);
2092
2093 free(view->line);
2094 view->line = NULL;
2095 }
2096
2097 view->start_time = time(NULL);
2098
2099 return TRUE;
2100 }
2101
2102 #define ITEM_CHUNK_SIZE 256
2103 static void *
2104 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2105 {
2106 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2107 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2108
2109 if (mem == NULL || num_chunks != num_chunks_new) {
2110 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2111 mem = realloc(mem, *size * item_size);
2112 }
2113
2114 return mem;
2115 }
2116
2117 static struct line *
2118 realloc_lines(struct view *view, size_t line_size)
2119 {
2120 size_t alloc = view->line_alloc;
2121 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2122 sizeof(*view->line));
2123
2124 if (!tmp)
2125 return NULL;
2126
2127 view->line = tmp;
2128 view->line_alloc = alloc;
2129 view->line_size = line_size;
2130 return view->line;
2131 }
2132
2133 static bool
2134 update_view(struct view *view)
2135 {
2136 char in_buffer[BUFSIZ];
2137 char out_buffer[BUFSIZ * 2];
2138 char *line;
2139 /* The number of lines to read. If too low it will cause too much
2140 * redrawing (and possible flickering), if too high responsiveness
2141 * will suffer. */
2142 unsigned long lines = view->height;
2143 int redraw_from = -1;
2144
2145 if (!view->pipe)
2146 return TRUE;
2147
2148 /* Only redraw if lines are visible. */
2149 if (view->offset + view->height >= view->lines)
2150 redraw_from = view->lines - view->offset;
2151
2152 /* FIXME: This is probably not perfect for backgrounded views. */
2153 if (!realloc_lines(view, view->lines + lines))
2154 goto alloc_error;
2155
2156 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
2157 size_t linelen = strlen(line);
2158
2159 if (linelen)
2160 line[linelen - 1] = 0;
2161
2162 if (opt_iconv != ICONV_NONE) {
2163 ICONV_CONST char *inbuf = line;
2164 size_t inlen = linelen;
2165
2166 char *outbuf = out_buffer;
2167 size_t outlen = sizeof(out_buffer);
2168
2169 size_t ret;
2170
2171 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2172 if (ret != (size_t) -1) {
2173 line = out_buffer;
2174 linelen = strlen(out_buffer);
2175 }
2176 }
2177
2178 if (!view->ops->read(view, line))
2179 goto alloc_error;
2180
2181 if (lines-- == 1)
2182 break;
2183 }
2184
2185 {
2186 int digits;
2187
2188 lines = view->lines;
2189 for (digits = 0; lines; digits++)
2190 lines /= 10;
2191
2192 /* Keep the displayed view in sync with line number scaling. */
2193 if (digits != view->digits) {
2194 view->digits = digits;
2195 redraw_from = 0;
2196 }
2197 }
2198
2199 if (!view_is_displayed(view))
2200 goto check_pipe;
2201
2202 if (view == VIEW(REQ_VIEW_TREE)) {
2203 /* Clear the view and redraw everything since the tree sorting
2204 * might have rearranged things. */
2205 redraw_view(view);
2206
2207 } else if (redraw_from >= 0) {
2208 /* If this is an incremental update, redraw the previous line
2209 * since for commits some members could have changed when
2210 * loading the main view. */
2211 if (redraw_from > 0)
2212 redraw_from--;
2213
2214 /* Since revision graph visualization requires knowledge
2215 * about the parent commit, it causes a further one-off
2216 * needed to be redrawn for incremental updates. */
2217 if (redraw_from > 0 && opt_rev_graph)
2218 redraw_from--;
2219
2220 /* Incrementally draw avoids flickering. */
2221 redraw_view_from(view, redraw_from);
2222 }
2223
2224 /* Update the title _after_ the redraw so that if the redraw picks up a
2225 * commit reference in view->ref it'll be available here. */
2226 update_view_title(view);
2227
2228 check_pipe:
2229 if (ferror(view->pipe)) {
2230 report("Failed to read: %s", strerror(errno));
2231 goto end;
2232
2233 } else if (feof(view->pipe)) {
2234 report("");
2235 goto end;
2236 }
2237
2238 return TRUE;
2239
2240 alloc_error:
2241 report("Allocation failure");
2242
2243 end:
2244 view->ops->read(view, NULL);
2245 end_update(view);
2246 return FALSE;
2247 }
2248
2249 static struct line *
2250 add_line_data(struct view *view, void *data, enum line_type type)
2251 {
2252 struct line *line = &view->line[view->lines++];
2253
2254 memset(line, 0, sizeof(*line));
2255 line->type = type;
2256 line->data = data;
2257
2258 return line;
2259 }
2260
2261 static struct line *
2262 add_line_text(struct view *view, char *data, enum line_type type)
2263 {
2264 if (data)
2265 data = strdup(data);
2266
2267 return data ? add_line_data(view, data, type) : NULL;
2268 }
2269
2270
2271 /*
2272 * View opening
2273 */
2274
2275 enum open_flags {
2276 OPEN_DEFAULT = 0, /* Use default view switching. */
2277 OPEN_SPLIT = 1, /* Split current view. */
2278 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2279 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2280 };
2281
2282 static void
2283 open_view(struct view *prev, enum request request, enum open_flags flags)
2284 {
2285 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2286 bool split = !!(flags & OPEN_SPLIT);
2287 bool reload = !!(flags & OPEN_RELOAD);
2288 struct view *view = VIEW(request);
2289 int nviews = displayed_views();
2290 struct view *base_view = display[0];
2291
2292 if (view == prev && nviews == 1 && !reload) {
2293 report("Already in %s view", view->name);
2294 return;
2295 }
2296
2297 if (view->ops->open) {
2298 if (!view->ops->open(view)) {
2299 report("Failed to load %s view", view->name);
2300 return;
2301 }
2302
2303 } else if ((reload || strcmp(view->vid, view->id)) &&
2304 !begin_update(view)) {
2305 report("Failed to load %s view", view->name);
2306 return;
2307 }
2308
2309 if (split) {
2310 display[1] = view;
2311 if (!backgrounded)
2312 current_view = 1;
2313 } else {
2314 /* Maximize the current view. */
2315 memset(display, 0, sizeof(display));
2316 current_view = 0;
2317 display[current_view] = view;
2318 }
2319
2320 /* Resize the view when switching between split- and full-screen,
2321 * or when switching between two different full-screen views. */
2322 if (nviews != displayed_views() ||
2323 (nviews == 1 && base_view != display[0]))
2324 resize_display();
2325
2326 if (split && prev->lineno - prev->offset >= prev->height) {
2327 /* Take the title line into account. */
2328 int lines = prev->lineno - prev->offset - prev->height + 1;
2329
2330 /* Scroll the view that was split if the current line is
2331 * outside the new limited view. */
2332 do_scroll_view(prev, lines);
2333 }
2334
2335 if (prev && view != prev) {
2336 if (split && !backgrounded) {
2337 /* "Blur" the previous view. */
2338 update_view_title(prev);
2339 }
2340
2341 view->parent = prev;
2342 }
2343
2344 if (view->pipe && view->lines == 0) {
2345 /* Clear the old view and let the incremental updating refill
2346 * the screen. */
2347 wclear(view->win);
2348 report("");
2349 } else {
2350 redraw_view(view);
2351 report("");
2352 }
2353
2354 /* If the view is backgrounded the above calls to report()
2355 * won't redraw the view title. */
2356 if (backgrounded)
2357 update_view_title(view);
2358 }
2359
2360 static void
2361 open_external_viewer(const char *cmd)
2362 {
2363 def_prog_mode(); /* save current tty modes */
2364 endwin(); /* restore original tty modes */
2365 system(cmd);
2366 fprintf(stderr, "Press Enter to continue");
2367 getc(stdin);
2368 reset_prog_mode();
2369 redraw_display();
2370 }
2371
2372 static void
2373 open_mergetool(const char *file)
2374 {
2375 char cmd[SIZEOF_STR];
2376 char file_sq[SIZEOF_STR];
2377
2378 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2379 string_format(cmd, "git mergetool %s", file_sq)) {
2380 open_external_viewer(cmd);
2381 }
2382 }
2383
2384 static void
2385 open_editor(bool from_root, const char *file)
2386 {
2387 char cmd[SIZEOF_STR];
2388 char file_sq[SIZEOF_STR];
2389 char *editor;
2390 char *prefix = from_root ? opt_cdup : "";
2391
2392 editor = getenv("GIT_EDITOR");
2393 if (!editor && *opt_editor)
2394 editor = opt_editor;
2395 if (!editor)
2396 editor = getenv("VISUAL");
2397 if (!editor)
2398 editor = getenv("EDITOR");
2399 if (!editor)
2400 editor = "vi";
2401
2402 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2403 string_format(cmd, "%s %s%s", editor, prefix, file_sq)) {
2404 open_external_viewer(cmd);
2405 }
2406 }
2407
2408 static void
2409 open_run_request(enum request request)
2410 {
2411 struct run_request *req = get_run_request(request);
2412 char buf[SIZEOF_STR * 2];
2413 size_t bufpos;
2414 char *cmd;
2415
2416 if (!req) {
2417 report("Unknown run request");
2418 return;
2419 }
2420
2421 bufpos = 0;
2422 cmd = req->cmd;
2423
2424 while (cmd) {
2425 char *next = strstr(cmd, "%(");
2426 int len = next - cmd;
2427 char *value;
2428
2429 if (!next) {
2430 len = strlen(cmd);
2431 value = "";
2432
2433 } else if (!strncmp(next, "%(head)", 7)) {
2434 value = ref_head;
2435
2436 } else if (!strncmp(next, "%(commit)", 9)) {
2437 value = ref_commit;
2438
2439 } else if (!strncmp(next, "%(blob)", 7)) {
2440 value = ref_blob;
2441
2442 } else {
2443 report("Unknown replacement in run request: `%s`", req->cmd);
2444 return;
2445 }
2446
2447 if (!string_format_from(buf, &bufpos, "%.*s%s", len, cmd, value))
2448 return;
2449
2450 if (next)
2451 next = strchr(next, ')') + 1;
2452 cmd = next;
2453 }
2454
2455 open_external_viewer(buf);
2456 }
2457
2458 /*
2459 * User request switch noodle
2460 */
2461
2462 static int
2463 view_driver(struct view *view, enum request request)
2464 {
2465 int i;
2466
2467 if (request == REQ_NONE) {
2468 doupdate();
2469 return TRUE;
2470 }
2471
2472 if (request > REQ_NONE) {
2473 open_run_request(request);
2474 return TRUE;
2475 }
2476
2477 if (view && view->lines) {
2478 request = view->ops->request(view, request, &view->line[view->lineno]);
2479 if (request == REQ_NONE)
2480 return TRUE;
2481 }
2482
2483 switch (request) {
2484 case REQ_MOVE_UP:
2485 case REQ_MOVE_DOWN:
2486 case REQ_MOVE_PAGE_UP:
2487 case REQ_MOVE_PAGE_DOWN:
2488 case REQ_MOVE_FIRST_LINE:
2489 case REQ_MOVE_LAST_LINE:
2490 move_view(view, request);
2491 break;
2492
2493 case REQ_SCROLL_LINE_DOWN:
2494 case REQ_SCROLL_LINE_UP:
2495 case REQ_SCROLL_PAGE_DOWN:
2496 case REQ_SCROLL_PAGE_UP:
2497 scroll_view(view, request);
2498 break;
2499
2500 case REQ_VIEW_BLOB:
2501 if (!ref_blob[0]) {
2502 report("No file chosen, press %s to open tree view",
2503 get_key(REQ_VIEW_TREE));
2504 break;
2505 }
2506 open_view(view, request, OPEN_DEFAULT);
2507 break;
2508
2509 case REQ_VIEW_PAGER:
2510 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2511 report("No pager content, press %s to run command from prompt",
2512 get_key(REQ_PROMPT));
2513 break;
2514 }
2515 open_view(view, request, OPEN_DEFAULT);
2516 break;
2517
2518 case REQ_VIEW_STAGE:
2519 if (!VIEW(REQ_VIEW_STAGE)->lines) {
2520 report("No stage content, press %s to open the status view and choose file",
2521 get_key(REQ_VIEW_STATUS));
2522 break;
2523 }
2524 open_view(view, request, OPEN_DEFAULT);
2525 break;
2526
2527 case REQ_VIEW_STATUS:
2528 if (opt_is_inside_work_tree == FALSE) {
2529 report("The status view requires a working tree");
2530 break;
2531 }
2532 open_view(view, request, OPEN_DEFAULT);
2533 break;
2534
2535 case REQ_VIEW_MAIN:
2536 case REQ_VIEW_DIFF:
2537 case REQ_VIEW_LOG:
2538 case REQ_VIEW_TREE:
2539 case REQ_VIEW_HELP:
2540 open_view(view, request, OPEN_DEFAULT);
2541 break;
2542
2543 case REQ_NEXT:
2544 case REQ_PREVIOUS:
2545 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2546
2547 if ((view == VIEW(REQ_VIEW_DIFF) &&
2548 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2549 (view == VIEW(REQ_VIEW_STAGE) &&
2550 view->parent == VIEW(REQ_VIEW_STATUS)) ||
2551 (view == VIEW(REQ_VIEW_BLOB) &&
2552 view->parent == VIEW(REQ_VIEW_TREE))) {
2553 int line;
2554
2555 view = view->parent;
2556 line = view->lineno;
2557 move_view(view, request);
2558 if (view_is_displayed(view))
2559 update_view_title(view);
2560 if (line != view->lineno)
2561 view->ops->request(view, REQ_ENTER,
2562 &view->line[view->lineno]);
2563
2564 } else {
2565 move_view(view, request);
2566 }
2567 break;
2568
2569 case REQ_VIEW_NEXT:
2570 {
2571 int nviews = displayed_views();
2572 int next_view = (current_view + 1) % nviews;
2573
2574 if (next_view == current_view) {
2575 report("Only one view is displayed");
2576 break;
2577 }
2578
2579 current_view = next_view;
2580 /* Blur out the title of the previous view. */
2581 update_view_title(view);
2582 report("");
2583 break;
2584 }
2585 case REQ_REFRESH:
2586 report("Refreshing is not yet supported for the %s view", view->name);
2587 break;
2588
2589 case REQ_TOGGLE_LINENO:
2590 opt_line_number = !opt_line_number;
2591 redraw_display();
2592 break;
2593
2594 case REQ_TOGGLE_DATE:
2595 opt_date = !opt_date;
2596 redraw_display();
2597 break;
2598
2599 case REQ_TOGGLE_AUTHOR:
2600 opt_author = !opt_author;
2601 redraw_display();
2602 break;
2603
2604 case REQ_TOGGLE_REV_GRAPH:
2605 opt_rev_graph = !opt_rev_graph;
2606 redraw_display();
2607 break;
2608
2609 case REQ_TOGGLE_REFS:
2610 opt_show_refs = !opt_show_refs;
2611 redraw_display();
2612 break;
2613
2614 case REQ_PROMPT:
2615 /* Always reload^Wrerun commands from the prompt. */
2616 open_view(view, opt_request, OPEN_RELOAD);
2617 break;
2618
2619 case REQ_SEARCH:
2620 case REQ_SEARCH_BACK:
2621 search_view(view, request);
2622 break;
2623
2624 case REQ_FIND_NEXT:
2625 case REQ_FIND_PREV:
2626 find_next(view, request);
2627 break;
2628
2629 case REQ_STOP_LOADING:
2630 for (i = 0; i < ARRAY_SIZE(views); i++) {
2631 view = &views[i];
2632 if (view->pipe)
2633 report("Stopped loading the %s view", view->name),
2634 end_update(view);
2635 }
2636 break;
2637
2638 case REQ_SHOW_VERSION:
2639 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
2640 return TRUE;
2641
2642 case REQ_SCREEN_RESIZE:
2643 resize_display();
2644 /* Fall-through */
2645 case REQ_SCREEN_REDRAW:
2646 redraw_display();
2647 break;
2648
2649 case REQ_EDIT:
2650 report("Nothing to edit");
2651 break;
2652
2653
2654 case REQ_ENTER:
2655 report("Nothing to enter");
2656 break;
2657
2658
2659 case REQ_VIEW_CLOSE:
2660 /* XXX: Mark closed views by letting view->parent point to the
2661 * view itself. Parents to closed view should never be
2662 * followed. */
2663 if (view->parent &&
2664 view->parent->parent != view->parent) {
2665 memset(display, 0, sizeof(display));
2666 current_view = 0;
2667 display[current_view] = view->parent;
2668 view->parent = view;
2669 resize_display();
2670 redraw_display();
2671 break;
2672 }
2673 /* Fall-through */
2674 case REQ_QUIT:
2675 return FALSE;
2676
2677 default:
2678 /* An unknown key will show most commonly used commands. */
2679 report("Unknown key, press 'h' for help");
2680 return TRUE;
2681 }
2682
2683 return TRUE;
2684 }
2685
2686
2687 /*
2688 * Pager backend
2689 */
2690
2691 static bool
2692 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2693 {
2694 char *text = line->data;
2695 enum line_type type = line->type;
2696 int attr;
2697
2698 wmove(view->win, lineno, 0);
2699
2700 if (selected) {
2701 type = LINE_CURSOR;
2702 wchgat(view->win, -1, 0, type, NULL);
2703 }
2704
2705 attr = get_line_attr(type);
2706 wattrset(view->win, attr);
2707
2708 if (opt_line_number || opt_tab_size < TABSIZE) {
2709 static char spaces[] = " ";
2710 int col_offset = 0, col = 0;
2711
2712 if (opt_line_number) {
2713 unsigned long real_lineno = view->offset + lineno + 1;
2714
2715 if (real_lineno == 1 ||
2716 (real_lineno % opt_num_interval) == 0) {
2717 wprintw(view->win, "%.*d", view->digits, real_lineno);
2718
2719 } else {
2720 waddnstr(view->win, spaces,
2721 MIN(view->digits, STRING_SIZE(spaces)));
2722 }
2723 waddstr(view->win, ": ");
2724 col_offset = view->digits + 2;
2725 }
2726
2727 while (text && col_offset + col < view->width) {
2728 int cols_max = view->width - col_offset - col;
2729 char *pos = text;
2730 int cols;
2731
2732 if (*text == '\t') {
2733 text++;
2734 assert(sizeof(spaces) > TABSIZE);
2735 pos = spaces;
2736 cols = opt_tab_size - (col % opt_tab_size);
2737
2738 } else {
2739 text = strchr(text, '\t');
2740 cols = line ? text - pos : strlen(pos);
2741 }
2742
2743 waddnstr(view->win, pos, MIN(cols, cols_max));
2744 col += cols;
2745 }
2746
2747 } else {
2748 int tilde_attr = get_line_attr(LINE_MAIN_DELIM);
2749
2750 draw_text(view, text, view->width, TRUE, tilde_attr);
2751 }
2752
2753 return TRUE;
2754 }
2755
2756 static bool
2757 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2758 {
2759 char refbuf[SIZEOF_STR];
2760 char *ref = NULL;
2761 FILE *pipe;
2762
2763 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2764 return TRUE;
2765
2766 pipe = popen(refbuf, "r");
2767 if (!pipe)
2768 return TRUE;
2769
2770 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2771 ref = chomp_string(ref);
2772 pclose(pipe);
2773
2774 if (!ref || !*ref)
2775 return TRUE;
2776
2777 /* This is the only fatal call, since it can "corrupt" the buffer. */
2778 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2779 return FALSE;
2780
2781 return TRUE;
2782 }
2783
2784 static void
2785 add_pager_refs(struct view *view, struct line *line)
2786 {
2787 char buf[SIZEOF_STR];
2788 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
2789 struct ref **refs;
2790 size_t bufpos = 0, refpos = 0;
2791 const char *sep = "Refs: ";
2792 bool is_tag = FALSE;
2793
2794 assert(line->type == LINE_COMMIT);
2795
2796 refs = get_refs(commit_id);
2797 if (!refs) {
2798 if (view == VIEW(REQ_VIEW_DIFF))
2799 goto try_add_describe_ref;
2800 return;
2801 }
2802
2803 do {
2804 struct ref *ref = refs[refpos];
2805 char *fmt = ref->tag ? "%s[%s]" :
2806 ref->remote ? "%s<%s>" : "%s%s";
2807
2808 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2809 return;
2810 sep = ", ";
2811 if (ref->tag)
2812 is_tag = TRUE;
2813 } while (refs[refpos++]->next);
2814
2815 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2816 try_add_describe_ref:
2817 /* Add <tag>-g<commit_id> "fake" reference. */
2818 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2819 return;
2820 }
2821
2822 if (bufpos == 0)
2823 return;
2824
2825 if (!realloc_lines(view, view->line_size + 1))
2826 return;
2827
2828 add_line_text(view, buf, LINE_PP_REFS);
2829 }
2830
2831 static bool
2832 pager_read(struct view *view, char *data)
2833 {
2834 struct line *line;
2835
2836 if (!data)
2837 return TRUE;
2838
2839 line = add_line_text(view, data, get_line_type(data));
2840 if (!line)
2841 return FALSE;
2842
2843 if (line->type == LINE_COMMIT &&
2844 (view == VIEW(REQ_VIEW_DIFF) ||
2845 view == VIEW(REQ_VIEW_LOG)))
2846 add_pager_refs(view, line);
2847
2848 return TRUE;
2849 }
2850
2851 static enum request
2852 pager_request(struct view *view, enum request request, struct line *line)
2853 {
2854 int split = 0;
2855
2856 if (request != REQ_ENTER)
2857 return request;
2858
2859 if (line->type == LINE_COMMIT &&
2860 (view == VIEW(REQ_VIEW_LOG) ||
2861 view == VIEW(REQ_VIEW_PAGER))) {
2862 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2863 split = 1;
2864 }
2865
2866 /* Always scroll the view even if it was split. That way
2867 * you can use Enter to scroll through the log view and
2868 * split open each commit diff. */
2869 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2870
2871 /* FIXME: A minor workaround. Scrolling the view will call report("")
2872 * but if we are scrolling a non-current view this won't properly
2873 * update the view title. */
2874 if (split)
2875 update_view_title(view);
2876
2877 return REQ_NONE;
2878 }
2879
2880 static bool
2881 pager_grep(struct view *view, struct line *line)
2882 {
2883 regmatch_t pmatch;
2884 char *text = line->data;
2885
2886 if (!*text)
2887 return FALSE;
2888
2889 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2890 return FALSE;
2891
2892 return TRUE;
2893 }
2894
2895 static void
2896 pager_select(struct view *view, struct line *line)
2897 {
2898 if (line->type == LINE_COMMIT) {
2899 char *text = (char *)line->data + STRING_SIZE("commit ");
2900
2901 if (view != VIEW(REQ_VIEW_PAGER))
2902 string_copy_rev(view->ref, text);
2903 string_copy_rev(ref_commit, text);
2904 }
2905 }
2906
2907 static struct view_ops pager_ops = {
2908 "line",
2909 NULL,
2910 pager_read,
2911 pager_draw,
2912 pager_request,
2913 pager_grep,
2914 pager_select,
2915 };
2916
2917
2918 /*
2919 * Help backend
2920 */
2921
2922 static bool
2923 help_open(struct view *view)
2924 {
2925 char buf[BUFSIZ];
2926 int lines = ARRAY_SIZE(req_info) + 2;
2927 int i;
2928
2929 if (view->lines > 0)
2930 return TRUE;
2931
2932 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2933 if (!req_info[i].request)
2934 lines++;
2935
2936 lines += run_requests + 1;
2937
2938 view->line = calloc(lines, sizeof(*view->line));
2939 if (!view->line)
2940 return FALSE;
2941
2942 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2943
2944 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2945 char *key;
2946
2947 if (req_info[i].request == REQ_NONE)
2948 continue;
2949
2950 if (!req_info[i].request) {
2951 add_line_text(view, "", LINE_DEFAULT);
2952 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2953 continue;
2954 }
2955
2956 key = get_key(req_info[i].request);
2957 if (!*key)
2958 key = "(no key defined)";
2959
2960 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2961 continue;
2962
2963 add_line_text(view, buf, LINE_DEFAULT);
2964 }
2965
2966 if (run_requests) {
2967 add_line_text(view, "", LINE_DEFAULT);
2968 add_line_text(view, "External commands:", LINE_DEFAULT);
2969 }
2970
2971 for (i = 0; i < run_requests; i++) {
2972 struct run_request *req = get_run_request(REQ_NONE + i + 1);
2973 char *key;
2974
2975 if (!req)
2976 continue;
2977
2978 key = get_key_name(req->key);
2979 if (!*key)
2980 key = "(no key defined)";
2981
2982 if (!string_format(buf, " %-10s %-14s `%s`",
2983 keymap_table[req->keymap].name,
2984 key, req->cmd))
2985 continue;
2986
2987 add_line_text(view, buf, LINE_DEFAULT);
2988 }
2989
2990 return TRUE;
2991 }
2992
2993 static struct view_ops help_ops = {
2994 "line",
2995 help_open,
2996 NULL,
2997 pager_draw,
2998 pager_request,
2999 pager_grep,
3000 pager_select,
3001 };
3002
3003
3004 /*
3005 * Tree backend
3006 */
3007
3008 struct tree_stack_entry {
3009 struct tree_stack_entry *prev; /* Entry below this in the stack */
3010 unsigned long lineno; /* Line number to restore */
3011 char *name; /* Position of name in opt_path */
3012 };
3013
3014 /* The top of the path stack. */
3015 static struct tree_stack_entry *tree_stack = NULL;
3016 unsigned long tree_lineno = 0;
3017
3018 static void
3019 pop_tree_stack_entry(void)
3020 {
3021 struct tree_stack_entry *entry = tree_stack;
3022
3023 tree_lineno = entry->lineno;
3024 entry->name[0] = 0;
3025 tree_stack = entry->prev;
3026 free(entry);
3027 }
3028
3029 static void
3030 push_tree_stack_entry(char *name, unsigned long lineno)
3031 {
3032 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3033 size_t pathlen = strlen(opt_path);
3034
3035 if (!entry)
3036 return;
3037
3038 entry->prev = tree_stack;
3039 entry->name = opt_path + pathlen;
3040 tree_stack = entry;
3041
3042 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3043 pop_tree_stack_entry();
3044 return;
3045 }
3046
3047 /* Move the current line to the first tree entry. */
3048 tree_lineno = 1;
3049 entry->lineno = lineno;
3050 }
3051
3052 /* Parse output from git-ls-tree(1):
3053 *
3054 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
3055 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
3056 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3057 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
3058 */
3059
3060 #define SIZEOF_TREE_ATTR \
3061 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
3062
3063 #define TREE_UP_FORMAT "040000 tree %s\t.."
3064
3065 static int
3066 tree_compare_entry(enum line_type type1, char *name1,
3067 enum line_type type2, char *name2)
3068 {
3069 if (type1 != type2) {
3070 if (type1 == LINE_TREE_DIR)
3071 return -1;
3072 return 1;
3073 }
3074
3075 return strcmp(name1, name2);
3076 }
3077
3078 static bool
3079 tree_read(struct view *view, char *text)
3080 {
3081 size_t textlen = text ? strlen(text) : 0;
3082 char buf[SIZEOF_STR];
3083 unsigned long pos;
3084 enum line_type type;
3085 bool first_read = view->lines == 0;
3086
3087 if (textlen <= SIZEOF_TREE_ATTR)
3088 return FALSE;
3089
3090 type = text[STRING_SIZE("100644 ")] == 't'
3091 ? LINE_TREE_DIR : LINE_TREE_FILE;
3092
3093 if (first_read) {
3094 /* Add path info line */
3095 if (!string_format(buf, "Directory path /%s", opt_path) ||
3096 !realloc_lines(view, view->line_size + 1) ||
3097 !add_line_text(view, buf, LINE_DEFAULT))
3098 return FALSE;
3099
3100 /* Insert "link" to parent directory. */
3101 if (*opt_path) {
3102 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
3103 !realloc_lines(view, view->line_size + 1) ||
3104 !add_line_text(view, buf, LINE_TREE_DIR))
3105 return FALSE;
3106 }
3107 }
3108
3109 /* Strip the path part ... */
3110 if (*opt_path) {
3111 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3112 size_t striplen = strlen(opt_path);
3113 char *path = text + SIZEOF_TREE_ATTR;
3114
3115 if (pathlen > striplen)
3116 memmove(path, path + striplen,
3117 pathlen - striplen + 1);
3118 }
3119
3120 /* Skip "Directory ..." and ".." line. */
3121 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
3122 struct line *line = &view->line[pos];
3123 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
3124 char *path2 = text + SIZEOF_TREE_ATTR;
3125 int cmp = tree_compare_entry(line->type, path1, type, path2);
3126
3127 if (cmp <= 0)
3128 continue;
3129
3130 text = strdup(text);
3131 if (!text)
3132 return FALSE;
3133
3134 if (view->lines > pos)
3135 memmove(&view->line[pos + 1], &view->line[pos],
3136 (view->lines - pos) * sizeof(*line));
3137
3138 line = &view->line[pos];
3139 line->data = text;
3140 line->type = type;
3141 view->lines++;
3142 return TRUE;
3143 }
3144
3145 if (!add_line_text(view, text, type))
3146 return FALSE;
3147
3148 if (tree_lineno > view->lineno) {
3149 view->lineno = tree_lineno;
3150 tree_lineno = 0;
3151 }
3152
3153 return TRUE;
3154 }
3155
3156 static enum request
3157 tree_request(struct view *view, enum request request, struct line *line)
3158 {
3159 enum open_flags flags;
3160
3161 if (request == REQ_TREE_PARENT) {
3162 if (*opt_path) {
3163 /* fake 'cd ..' */
3164 request = REQ_ENTER;
3165 line = &view->line[1];
3166 } else {
3167 /* quit view if at top of tree */
3168 return REQ_VIEW_CLOSE;
3169 }
3170 }
3171 if (request != REQ_ENTER)
3172 return request;
3173
3174 /* Cleanup the stack if the tree view is at a different tree. */
3175 while (!*opt_path && tree_stack)
3176 pop_tree_stack_entry();
3177
3178 switch (line->type) {
3179 case LINE_TREE_DIR:
3180 /* Depending on whether it is a subdir or parent (updir?) link
3181 * mangle the path buffer. */
3182 if (line == &view->line[1] && *opt_path) {
3183 pop_tree_stack_entry();
3184
3185 } else {
3186 char *data = line->data;
3187 char *basename = data + SIZEOF_TREE_ATTR;
3188
3189 push_tree_stack_entry(basename, view->lineno);
3190 }
3191
3192 /* Trees and subtrees share the same ID, so they are not not
3193 * unique like blobs. */
3194 flags = OPEN_RELOAD;
3195 request = REQ_VIEW_TREE;
3196 break;
3197
3198 case LINE_TREE_FILE:
3199 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3200 request = REQ_VIEW_BLOB;
3201 break;
3202
3203 default:
3204 return TRUE;
3205 }
3206
3207 open_view(view, request, flags);
3208 if (request == REQ_VIEW_TREE) {
3209 view->lineno = tree_lineno;
3210 }
3211
3212 return REQ_NONE;
3213 }
3214
3215 static void
3216 tree_select(struct view *view, struct line *line)
3217 {
3218 char *text = (char *)line->data + STRING_SIZE("100644 blob ");
3219
3220 if (line->type == LINE_TREE_FILE) {
3221 string_copy_rev(ref_blob, text);
3222
3223 } else if (line->type != LINE_TREE_DIR) {
3224 return;
3225 }
3226
3227 string_copy_rev(view->ref, text);
3228 }
3229
3230 static struct view_ops tree_ops = {
3231 "file",
3232 NULL,
3233 tree_read,
3234 pager_draw,
3235 tree_request,
3236 pager_grep,
3237 tree_select,
3238 };
3239
3240 static bool
3241 blob_read(struct view *view, char *line)
3242 {
3243 return add_line_text(view, line, LINE_DEFAULT) != NULL;
3244 }
3245
3246 static struct view_ops blob_ops = {
3247 "line",
3248 NULL,
3249 blob_read,
3250 pager_draw,
3251 pager_request,
3252 pager_grep,
3253 pager_select,
3254 };
3255
3256
3257 /*
3258 * Status backend
3259 */
3260
3261 struct status {
3262 char status;
3263 struct {
3264 mode_t mode;
3265 char rev[SIZEOF_REV];
3266 char name[SIZEOF_STR];
3267 } old;
3268 struct {
3269 mode_t mode;
3270 char rev[SIZEOF_REV];
3271 char name[SIZEOF_STR];
3272 } new;
3273 };
3274
3275 static struct status stage_status;
3276 static enum line_type stage_line_type;
3277
3278 /* Get fields from the diff line:
3279 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
3280 */
3281 static inline bool
3282 status_get_diff(struct status *file, char *buf, size_t bufsize)
3283 {
3284 char *old_mode = buf + 1;
3285 char *new_mode = buf + 8;
3286 char *old_rev = buf + 15;
3287 char *new_rev = buf + 56;
3288 char *status = buf + 97;
3289
3290 if (bufsize < 99 ||
3291 old_mode[-1] != ':' ||
3292 new_mode[-1] != ' ' ||
3293 old_rev[-1] != ' ' ||
3294 new_rev[-1] != ' ' ||
3295 status[-1] != ' ')
3296 return FALSE;
3297
3298 file->status = *status;
3299
3300 string_copy_rev(file->old.rev, old_rev);
3301 string_copy_rev(file->new.rev, new_rev);
3302
3303 file->old.mode = strtoul(old_mode, NULL, 8);
3304 file->new.mode = strtoul(new_mode, NULL, 8);
3305
3306 file->old.name[0] = file->new.name[0] = 0;
3307
3308 return TRUE;
3309 }
3310
3311 static bool
3312 status_run(struct view *view, const char cmd[], bool diff, enum line_type type)
3313 {
3314 struct status *file = NULL;
3315 struct status *unmerged = NULL;
3316 char buf[SIZEOF_STR * 4];
3317 size_t bufsize = 0;
3318 FILE *pipe;
3319
3320 pipe = popen(cmd, "r");
3321 if (!pipe)
3322 return FALSE;
3323
3324 add_line_data(view, NULL, type);
3325
3326 while (!feof(pipe) && !ferror(pipe)) {
3327 char *sep;
3328 size_t readsize;
3329
3330 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
3331 if (!readsize)
3332 break;
3333 bufsize += readsize;
3334
3335 /* Process while we have NUL chars. */
3336 while ((sep = memchr(buf, 0, bufsize))) {
3337 size_t sepsize = sep - buf + 1;
3338
3339 if (!file) {
3340 if (!realloc_lines(view, view->line_size + 1))
3341 goto error_out;
3342
3343 file = calloc(1, sizeof(*file));
3344 if (!file)
3345 goto error_out;
3346
3347 add_line_data(view, file, type);
3348 }
3349
3350 /* Parse diff info part. */
3351 if (!diff) {
3352 file->status = '?';
3353
3354 } else if (!file->status) {
3355 if (!status_get_diff(file, buf, sepsize))
3356 goto error_out;
3357
3358 bufsize -= sepsize;
3359 memmove(buf, sep + 1, bufsize);
3360
3361 sep = memchr(buf, 0, bufsize);
3362 if (!sep)
3363 break;
3364 sepsize = sep - buf + 1;
3365
3366 /* Collapse all 'M'odified entries that
3367 * follow a associated 'U'nmerged entry.
3368 */
3369 if (file->status == 'U') {
3370 unmerged = file;
3371
3372 } else if (unmerged) {
3373 int collapse = !strcmp(buf, unmerged->new.name);
3374
3375 unmerged = NULL;
3376 if (collapse) {
3377 free(file);
3378 view->lines--;
3379 continue;
3380 }
3381 }
3382 }
3383
3384 /* Grab the old name for rename/copy. */
3385 if (!*file->old.name &&
3386 (file->status == 'R' || file->status == 'C')) {
3387 sepsize = sep - buf + 1;
3388 string_ncopy(file->old.name, buf, sepsize);
3389 bufsize -= sepsize;
3390 memmove(buf, sep + 1, bufsize);
3391
3392 sep = memchr(buf, 0, bufsize);
3393 if (!sep)
3394 break;
3395 sepsize = sep - buf + 1;
3396 }
3397
3398 /* git-ls-files just delivers a NUL separated
3399 * list of file names similar to the second half
3400 * of the git-diff-* output. */
3401 string_ncopy(file->new.name, buf, sepsize);
3402 if (!*file->old.name)
3403 string_copy(file->old.name, file->new.name);
3404 bufsize -= sepsize;
3405 memmove(buf, sep + 1, bufsize);
3406 file = NULL;
3407 }
3408 }
3409
3410 if (ferror(pipe)) {
3411 error_out:
3412 pclose(pipe);
3413 return FALSE;
3414 }
3415
3416 if (!view->line[view->lines - 1].data)
3417 add_line_data(view, NULL, LINE_STAT_NONE);
3418
3419 pclose(pipe);
3420 return TRUE;
3421 }
3422
3423 /* Don't show unmerged entries in the staged section. */
3424 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --diff-filter=ACDMRTXB --cached -M HEAD"
3425 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
3426 #define STATUS_LIST_OTHER_CMD \
3427 "git ls-files -z --others --exclude-per-directory=.gitignore"
3428
3429 #define STATUS_DIFF_INDEX_SHOW_CMD \
3430 "git diff-index --root --patch-with-stat -C -M --cached HEAD -- %s %s 2>/dev/null"
3431
3432 #define STATUS_DIFF_FILES_SHOW_CMD \
3433 "git diff-files --root --patch-with-stat -C -M -- %s %s 2>/dev/null"
3434
3435 /* First parse staged info using git-diff-index(1), then parse unstaged
3436 * info using git-diff-files(1), and finally untracked files using
3437 * git-ls-files(1). */
3438 static bool
3439 status_open(struct view *view)
3440 {
3441 struct stat statbuf;
3442 char exclude[SIZEOF_STR];
3443 char cmd[SIZEOF_STR];
3444 unsigned long prev_lineno = view->lineno;
3445 size_t i;
3446
3447 for (i = 0; i < view->lines; i++)
3448 free(view->line[i].data);
3449 free(view->line);
3450 view->lines = view->line_alloc = view->line_size = view->lineno = 0;
3451 view->line = NULL;
3452
3453 if (!realloc_lines(view, view->line_size + 6))
3454 return FALSE;
3455
3456 if (!string_format(exclude, "%s/info/exclude", opt_git_dir))
3457 return FALSE;
3458
3459 string_copy(cmd, STATUS_LIST_OTHER_CMD);
3460
3461 if (stat(exclude, &statbuf) >= 0) {
3462 size_t cmdsize = strlen(cmd);
3463
3464 if (!string_format_from(cmd, &cmdsize, " %s", "--exclude-from=") ||
3465 sq_quote(cmd, cmdsize, exclude) >= sizeof(cmd))
3466 return FALSE;
3467 }
3468
3469 system("git update-index -q --refresh");
3470
3471 if (!status_run(view, STATUS_DIFF_INDEX_CMD, TRUE, LINE_STAT_STAGED) ||
3472 !status_run(view, STATUS_DIFF_FILES_CMD, TRUE, LINE_STAT_UNSTAGED) ||
3473 !status_run(view, cmd, FALSE, LINE_STAT_UNTRACKED))
3474 return FALSE;
3475
3476 /* If all went well restore the previous line number to stay in
3477 * the context. */
3478 if (prev_lineno < view->lines)
3479 view->lineno = prev_lineno;
3480 else
3481 view->lineno = view->lines - 1;
3482
3483 return TRUE;
3484 }
3485
3486 static bool
3487 status_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3488 {
3489 struct status *status = line->data;
3490 int tilde_attr = get_line_attr(LINE_MAIN_DELIM);
3491
3492 wmove(view->win, lineno, 0);
3493
3494 if (selected) {
3495 wattrset(view->win, get_line_attr(LINE_CURSOR));
3496 wchgat(view->win, -1, 0, LINE_CURSOR, NULL);
3497 tilde_attr = -1;
3498
3499 } else if (!status && line->type != LINE_STAT_NONE) {
3500 wattrset(view->win, get_line_attr(LINE_STAT_SECTION));
3501 wchgat(view->win, -1, 0, LINE_STAT_SECTION, NULL);
3502
3503 } else {
3504 wattrset(view->win, get_line_attr(line->type));
3505 }
3506
3507 if (!status) {
3508 char *text;
3509
3510 switch (line->type) {
3511 case LINE_STAT_STAGED:
3512 text = "Changes to be committed:";
3513 break;
3514
3515 case LINE_STAT_UNSTAGED:
3516 text = "Changed but not updated:";
3517 break;
3518
3519 case LINE_STAT_UNTRACKED:
3520 text = "Untracked files:";
3521 break;
3522
3523 case LINE_STAT_NONE:
3524 text = " (no files)";
3525 break;
3526
3527 default:
3528 return FALSE;
3529 }
3530
3531 draw_text(view, text, view->width, TRUE, tilde_attr);
3532 return TRUE;
3533 }
3534
3535 waddch(view->win, status->status);
3536 if (!selected)
3537 wattrset(view->win, A_NORMAL);
3538 wmove(view->win, lineno, 4);
3539 if (view->width < 5)
3540 return TRUE;
3541
3542 draw_text(view, status->new.name, view->width - 5, TRUE, tilde_attr);
3543 return TRUE;
3544 }
3545
3546 static enum request
3547 status_enter(struct view *view, struct line *line)
3548 {
3549 struct status *status = line->data;
3550 char oldpath[SIZEOF_STR] = "";
3551 char newpath[SIZEOF_STR] = "";
3552 char *info;
3553 size_t cmdsize = 0;
3554
3555 if (line->type == LINE_STAT_NONE ||
3556 (!status && line[1].type == LINE_STAT_NONE)) {
3557 report("No file to diff");
3558 return REQ_NONE;
3559 }
3560
3561 if (status) {
3562 if (sq_quote(oldpath, 0, status->old.name) >= sizeof(oldpath))
3563 return REQ_QUIT;
3564 /* Diffs for unmerged entries are empty when pasing the
3565 * new path, so leave it empty. */
3566 if (status->status != 'U' &&
3567 sq_quote(newpath, 0, status->new.name) >= sizeof(newpath))
3568 return REQ_QUIT;
3569 }
3570
3571 if (opt_cdup[0] &&
3572 line->type != LINE_STAT_UNTRACKED &&
3573 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
3574 return REQ_QUIT;
3575
3576 switch (line->type) {
3577 case LINE_STAT_STAGED:
3578 if (!string_format_from(opt_cmd, &cmdsize,
3579 STATUS_DIFF_INDEX_SHOW_CMD, oldpath, newpath))
3580 return REQ_QUIT;
3581 if (status)
3582 info = "Staged changes to %s";
3583 else
3584 info = "Staged changes";
3585 break;
3586
3587 case LINE_STAT_UNSTAGED:
3588 if (!string_format_from(opt_cmd, &cmdsize,
3589 STATUS_DIFF_FILES_SHOW_CMD, oldpath, newpath))
3590 return REQ_QUIT;
3591 if (status)
3592 info = "Unstaged changes to %s";
3593 else
3594 info = "Unstaged changes";
3595 break;
3596
3597 case LINE_STAT_UNTRACKED:
3598 if (opt_pipe)
3599 return REQ_QUIT;
3600
3601
3602 if (!status) {
3603 report("No file to show");
3604 return REQ_NONE;
3605 }
3606
3607 opt_pipe = fopen(status->new.name, "r");
3608 info = "Untracked file %s";
3609 break;
3610
3611 default:
3612 die("line type %d not handled in switch", line->type);
3613 }
3614
3615 open_view(view, REQ_VIEW_STAGE, OPEN_RELOAD | OPEN_SPLIT);
3616 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
3617 if (status) {
3618 stage_status = *status;
3619 } else {
3620 memset(&stage_status, 0, sizeof(stage_status));
3621 }
3622
3623 stage_line_type = line->type;
3624 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
3625 }
3626
3627 return REQ_NONE;
3628 }
3629
3630
3631 static bool
3632 status_update_file(struct view *view, struct status *status, enum line_type type)
3633 {
3634 char cmd[SIZEOF_STR];
3635 char buf[SIZEOF_STR];
3636 size_t cmdsize = 0;
3637 size_t bufsize = 0;
3638 size_t written = 0;
3639 FILE *pipe;
3640
3641 if (opt_cdup[0] &&
3642 type != LINE_STAT_UNTRACKED &&
3643 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3644 return FALSE;
3645
3646 switch (type) {
3647 case LINE_STAT_STAGED:
3648 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
3649 status->old.mode,
3650 status->old.rev,
3651 status->old.name, 0))
3652 return FALSE;
3653
3654 string_add(cmd, cmdsize, "git update-index -z --index-info");
3655 break;
3656
3657 case LINE_STAT_UNSTAGED:
3658 case LINE_STAT_UNTRACKED:
3659 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
3660 return FALSE;
3661
3662 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
3663 break;
3664
3665 default:
3666 die("line type %d not handled in switch", type);
3667 }
3668
3669 pipe = popen(cmd, "w");
3670 if (!pipe)
3671 return FALSE;
3672
3673 while (!ferror(pipe) && written < bufsize) {
3674 written += fwrite(buf + written, 1, bufsize - written, pipe);
3675 }
3676
3677 pclose(pipe);
3678
3679 if (written != bufsize)
3680 return FALSE;
3681
3682 return TRUE;
3683 }
3684
3685 static void
3686 status_update(struct view *view)
3687 {
3688 struct line *line = &view->line[view->lineno];
3689
3690 assert(view->lines);
3691
3692 if (!line->data) {
3693 while (++line < view->line + view->lines && line->data) {
3694 if (!status_update_file(view, line->data, line->type))
3695 report("Failed to update file status");
3696 }
3697
3698 if (!line[-1].data) {
3699 report("Nothing to update");
3700 return;
3701 }
3702
3703 } else if (!status_update_file(view, line->data, line->type)) {
3704 report("Failed to update file status");
3705 }
3706 }
3707
3708 static enum request
3709 status_request(struct view *view, enum request request, struct line *line)
3710 {
3711 struct status *status = line->data;
3712
3713 switch (request) {
3714 case REQ_STATUS_UPDATE:
3715 status_update(view);
3716 break;
3717
3718 case REQ_STATUS_MERGE:
3719 if (!status || status->status != 'U') {
3720 report("Merging only possible for files with unmerged status ('U').");
3721 return REQ_NONE;
3722 }
3723 open_mergetool(status->new.name);
3724 break;
3725
3726 case REQ_EDIT:
3727 if (!status)
3728 return request;
3729
3730 open_editor(status->status != '?', status->new.name);
3731 break;
3732
3733 case REQ_ENTER:
3734 /* After returning the status view has been split to
3735 * show the stage view. No further reloading is
3736 * necessary. */
3737 status_enter(view, line);
3738 return REQ_NONE;
3739
3740 case REQ_REFRESH:
3741 /* Simply reload the view. */
3742 break;
3743
3744 default:
3745 return request;
3746 }
3747
3748 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3749
3750 return REQ_NONE;
3751 }
3752
3753 static void
3754 status_select(struct view *view, struct line *line)
3755 {
3756 struct status *status = line->data;
3757 char file[SIZEOF_STR] = "all files";
3758 char *text;
3759 char *key;
3760
3761 if (status && !string_format(file, "'%s'", status->new.name))
3762 return;
3763
3764 if (!status && line[1].type == LINE_STAT_NONE)
3765 line++;
3766
3767 switch (line->type) {
3768 case LINE_STAT_STAGED:
3769 text = "Press %s to unstage %s for commit";
3770 break;
3771
3772 case LINE_STAT_UNSTAGED:
3773 text = "Press %s to stage %s for commit";
3774 break;
3775
3776 case LINE_STAT_UNTRACKED:
3777 text = "Press %s to stage %s for addition";
3778 break;
3779
3780 case LINE_STAT_NONE:
3781 text = "Nothing to update";
3782 break;
3783
3784 default:
3785 die("line type %d not handled in switch", line->type);
3786 }
3787
3788 if (status && status->status == 'U') {
3789 text = "Press %s to resolve conflict in %s";
3790 key = get_key(REQ_STATUS_MERGE);
3791
3792 } else {
3793 key = get_key(REQ_STATUS_UPDATE);
3794 }
3795
3796 string_format(view->ref, text, key, file);
3797 }
3798
3799 static bool
3800 status_grep(struct view *view, struct line *line)
3801 {
3802 struct status *status = line->data;
3803 enum { S_STATUS, S_NAME, S_END } state;
3804 char buf[2] = "?";
3805 regmatch_t pmatch;
3806
3807 if (!status)
3808 return FALSE;
3809
3810 for (state = S_STATUS; state < S_END; state++) {
3811 char *text;
3812
3813 switch (state) {
3814 case S_NAME: text = status->new.name; break;
3815 case S_STATUS:
3816 buf[0] = status->status;
3817 text = buf;
3818 break;
3819
3820 default:
3821 return FALSE;
3822 }
3823
3824 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3825 return TRUE;
3826 }
3827
3828 return FALSE;
3829 }
3830
3831 static struct view_ops status_ops = {
3832 "file",
3833 status_open,
3834 NULL,
3835 status_draw,
3836 status_request,
3837 status_grep,
3838 status_select,
3839 };
3840
3841
3842 static bool
3843 stage_diff_line(FILE *pipe, struct line *line)
3844 {
3845 char *buf = line->data;
3846 size_t bufsize = strlen(buf);
3847 size_t written = 0;
3848
3849 while (!ferror(pipe) && written < bufsize) {
3850 written += fwrite(buf + written, 1, bufsize - written, pipe);
3851 }
3852
3853 fputc('\n', pipe);
3854
3855 return written == bufsize;
3856 }
3857
3858 static struct line *
3859 stage_diff_hdr(struct view *view, struct line *line)
3860 {
3861 int diff_hdr_dir = line->type == LINE_DIFF_CHUNK ? -1 : 1;
3862 struct line *diff_hdr;
3863
3864 if (line->type == LINE_DIFF_CHUNK)
3865 diff_hdr = line - 1;
3866 else
3867 diff_hdr = view->line + 1;
3868
3869 while (diff_hdr > view->line && diff_hdr < view->line + view->lines) {
3870 if (diff_hdr->type == LINE_DIFF_HEADER)
3871 return diff_hdr;
3872
3873 diff_hdr += diff_hdr_dir;
3874 }
3875
3876 return NULL;
3877 }
3878
3879 static bool
3880 stage_update_chunk(struct view *view, struct line *line)
3881 {
3882 char cmd[SIZEOF_STR];
3883 size_t cmdsize = 0;
3884 struct line *diff_hdr, *diff_chunk, *diff_end;
3885 FILE *pipe;
3886
3887 diff_hdr = stage_diff_hdr(view, line);
3888 if (!diff_hdr)
3889 return FALSE;
3890
3891 if (opt_cdup[0] &&
3892 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3893 return FALSE;
3894
3895 if (!string_format_from(cmd, &cmdsize,
3896 "git apply --cached %s - && "
3897 "git update-index -q --unmerged --refresh 2>/dev/null",
3898 stage_line_type == LINE_STAT_STAGED ? "-R" : ""))
3899 return FALSE;
3900
3901 pipe = popen(cmd, "w");
3902 if (!pipe)
3903 return FALSE;
3904
3905 diff_end = view->line + view->lines;
3906 if (line->type != LINE_DIFF_CHUNK) {
3907 diff_chunk = diff_hdr;
3908
3909 } else {
3910 for (diff_chunk = line + 1; diff_chunk < diff_end; diff_chunk++)
3911 if (diff_chunk->type == LINE_DIFF_CHUNK ||
3912 diff_chunk->type == LINE_DIFF_HEADER)
3913 diff_end = diff_chunk;
3914
3915 diff_chunk = line;
3916
3917 while (diff_hdr->type != LINE_DIFF_CHUNK) {
3918 switch (diff_hdr->type) {
3919 case LINE_DIFF_HEADER:
3920 case LINE_DIFF_INDEX:
3921 case LINE_DIFF_ADD:
3922 case LINE_DIFF_DEL:
3923 break;
3924
3925 default:
3926 diff_hdr++;
3927 continue;
3928 }
3929
3930 if (!stage_diff_line(pipe, diff_hdr++)) {
3931 pclose(pipe);
3932 return FALSE;
3933 }
3934 }
3935 }
3936
3937 while (diff_chunk < diff_end && stage_diff_line(pipe, diff_chunk))
3938 diff_chunk++;
3939
3940 pclose(pipe);
3941
3942 if (diff_chunk != diff_end)
3943 return FALSE;
3944
3945 return TRUE;
3946 }
3947
3948 static void
3949 stage_update(struct view *view, struct line *line)
3950 {
3951 if (stage_line_type != LINE_STAT_UNTRACKED &&
3952 (line->type == LINE_DIFF_CHUNK || !stage_status.status)) {
3953 if (!stage_update_chunk(view, line)) {
3954 report("Failed to apply chunk");
3955 return;
3956 }
3957
3958 } else if (!status_update_file(view, &stage_status, stage_line_type)) {
3959 report("Failed to update file");
3960 return;
3961 }
3962
3963 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3964
3965 view = VIEW(REQ_VIEW_STATUS);
3966 if (view_is_displayed(view))
3967 status_enter(view, &view->line[view->lineno]);
3968 }
3969
3970 static enum request
3971 stage_request(struct view *view, enum request request, struct line *line)
3972 {
3973 switch (request) {
3974 case REQ_STATUS_UPDATE:
3975 stage_update(view, line);
3976 break;
3977
3978 case REQ_EDIT:
3979 if (!stage_status.new.name[0])
3980 return request;
3981
3982 open_editor(stage_status.status != '?', stage_status.new.name);
3983 break;
3984
3985 case REQ_ENTER:
3986 pager_request(view, request, line);
3987 break;
3988
3989 default:
3990 return request;
3991 }
3992
3993 return REQ_NONE;
3994 }
3995
3996 static struct view_ops stage_ops = {
3997 "line",
3998 NULL,
3999 pager_read,
4000 pager_draw,
4001 stage_request,
4002 pager_grep,
4003 pager_select,
4004 };
4005
4006
4007 /*
4008 * Revision graph
4009 */
4010
4011 struct commit {
4012 char id[SIZEOF_REV]; /* SHA1 ID. */
4013 char title[128]; /* First line of the commit message. */
4014 char author[75]; /* Author of the commit. */
4015 struct tm time; /* Date from the author ident. */
4016 struct ref **refs; /* Repository references. */
4017 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
4018 size_t graph_size; /* The width of the graph array. */
4019 bool has_parents; /* Rewritten --parents seen. */
4020 };
4021
4022 /* Size of rev graph with no "padding" columns */
4023 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
4024
4025 struct rev_graph {
4026 struct rev_graph *prev, *next, *parents;
4027 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
4028 size_t size;
4029 struct commit *commit;
4030 size_t pos;
4031 unsigned int boundary:1;
4032 };
4033
4034 /* Parents of the commit being visualized. */
4035 static struct rev_graph graph_parents[4];
4036
4037 /* The current stack of revisions on the graph. */
4038 static struct rev_graph graph_stacks[4] = {
4039 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
4040 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
4041 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
4042 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
4043 };
4044
4045 static inline bool
4046 graph_parent_is_merge(struct rev_graph *graph)
4047 {
4048 return graph->parents->size > 1;
4049 }
4050
4051 static inline void
4052 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
4053 {
4054 struct commit *commit = graph->commit;
4055
4056 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
4057 commit->graph[commit->graph_size++] = symbol;
4058 }
4059
4060 static void
4061 done_rev_graph(struct rev_graph *graph)
4062 {
4063 if (graph_parent_is_merge(graph) &&
4064 graph->pos < graph->size - 1 &&
4065 graph->next->size == graph->size + graph->parents->size - 1) {
4066 size_t i = graph->pos + graph->parents->size - 1;
4067
4068 graph->commit->graph_size = i * 2;
4069 while (i < graph->next->size - 1) {
4070 append_to_rev_graph(graph, ' ');
4071 append_to_rev_graph(graph, '\\');
4072 i++;
4073 }
4074 }
4075
4076 graph->size = graph->pos = 0;
4077 graph->commit = NULL;
4078 memset(graph->parents, 0, sizeof(*graph->parents));
4079 }
4080
4081 static void
4082 push_rev_graph(struct rev_graph *graph, char *parent)
4083 {
4084 int i;
4085
4086 /* "Collapse" duplicate parents lines.
4087 *
4088 * FIXME: This needs to also update update the drawn graph but
4089 * for now it just serves as a method for pruning graph lines. */
4090 for (i = 0; i < graph->size; i++)
4091 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
4092 return;
4093
4094 if (graph->size < SIZEOF_REVITEMS) {
4095 string_copy_rev(graph->rev[graph->size++], parent);
4096 }
4097 }
4098
4099 static chtype
4100 get_rev_graph_symbol(struct rev_graph *graph)
4101 {
4102 chtype symbol;
4103
4104 if (graph->boundary)
4105 symbol = REVGRAPH_BOUND;
4106 else if (graph->parents->size == 0)
4107 symbol = REVGRAPH_INIT;
4108 else if (graph_parent_is_merge(graph))
4109 symbol = REVGRAPH_MERGE;
4110 else if (graph->pos >= graph->size)
4111 symbol = REVGRAPH_BRANCH;
4112 else
4113 symbol = REVGRAPH_COMMIT;
4114
4115 return symbol;
4116 }
4117
4118 static void
4119 draw_rev_graph(struct rev_graph *graph)
4120 {
4121 struct rev_filler {
4122 chtype separator, line;
4123 };
4124 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
4125 static struct rev_filler fillers[] = {
4126 { ' ', REVGRAPH_LINE },
4127 { '`', '.' },
4128 { '\'', ' ' },
4129 { '/', ' ' },
4130 };
4131 chtype symbol = get_rev_graph_symbol(graph);
4132 struct rev_filler *filler;
4133 size_t i;
4134
4135 filler = &fillers[DEFAULT];
4136
4137 for (i = 0; i < graph->pos; i++) {
4138 append_to_rev_graph(graph, filler->line);
4139 if (graph_parent_is_merge(graph->prev) &&
4140 graph->prev->pos == i)
4141 filler = &fillers[RSHARP];
4142
4143 append_to_rev_graph(graph, filler->separator);
4144 }
4145
4146 /* Place the symbol for this revision. */
4147 append_to_rev_graph(graph, symbol);
4148
4149 if (graph->prev->size > graph->size)
4150 filler = &fillers[RDIAG];
4151 else
4152 filler = &fillers[DEFAULT];
4153
4154 i++;
4155
4156 for (; i < graph->size; i++) {
4157 append_to_rev_graph(graph, filler->separator);
4158 append_to_rev_graph(graph, filler->line);
4159 if (graph_parent_is_merge(graph->prev) &&
4160 i < graph->prev->pos + graph->parents->size)
4161 filler = &fillers[RSHARP];
4162 if (graph->prev->size > graph->size)
4163 filler = &fillers[LDIAG];
4164 }
4165
4166 if (graph->prev->size > graph->size) {
4167 append_to_rev_graph(graph, filler->separator);
4168 if (filler->line != ' ')
4169 append_to_rev_graph(graph, filler->line);
4170 }
4171 }
4172
4173 /* Prepare the next rev graph */
4174 static void
4175 prepare_rev_graph(struct rev_graph *graph)
4176 {
4177 size_t i;
4178
4179 /* First, traverse all lines of revisions up to the active one. */
4180 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
4181 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
4182 break;
4183
4184 push_rev_graph(graph->next, graph->rev[graph->pos]);
4185 }
4186
4187 /* Interleave the new revision parent(s). */
4188 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
4189 push_rev_graph(graph->next, graph->parents->rev[i]);
4190
4191 /* Lastly, put any remaining revisions. */
4192 for (i = graph->pos + 1; i < graph->size; i++)
4193 push_rev_graph(graph->next, graph->rev[i]);
4194 }
4195
4196 static void
4197 update_rev_graph(struct rev_graph *graph)
4198 {
4199 /* If this is the finalizing update ... */
4200 if (graph->commit)
4201 prepare_rev_graph(graph);
4202
4203 /* Graph visualization needs a one rev look-ahead,
4204 * so the first update doesn't visualize anything. */
4205 if (!graph->prev->commit)
4206 return;
4207
4208 draw_rev_graph(graph->prev);
4209 done_rev_graph(graph->prev->prev);
4210 }
4211
4212
4213 /*
4214 * Main view backend
4215 */
4216
4217 static bool
4218 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
4219 {
4220 char buf[DATE_COLS + 1];
4221 struct commit *commit = line->data;
4222 enum line_type type;
4223 int col = 0;
4224 size_t timelen;
4225 int tilde_attr;
4226 int space;
4227
4228 if (!*commit->author)
4229 return FALSE;
4230
4231 space = view->width;
4232 wmove(view->win, lineno, col);
4233
4234 if (selected) {
4235 type = LINE_CURSOR;
4236 wattrset(view->win, get_line_attr(type));
4237 wchgat(view->win, -1, 0, type, NULL);
4238 tilde_attr = -1;
4239 } else {
4240 type = LINE_MAIN_COMMIT;
4241 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
4242 tilde_attr = get_line_attr(LINE_MAIN_DELIM);
4243 }
4244
4245 if (opt_date) {
4246 int n;
4247
4248 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
4249 n = draw_text(view, buf, view->width - col, FALSE, tilde_attr);
4250 draw_text(view, " ", view->width - col - n, FALSE, tilde_attr);
4251
4252 col += DATE_COLS;
4253 wmove(view->win, lineno, col);
4254 if (col >= view->width)
4255 return TRUE;
4256 }
4257 if (type != LINE_CURSOR)
4258 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
4259
4260 if (opt_author) {
4261 int max_len;
4262
4263 max_len = view->width - col;
4264 if (max_len > AUTHOR_COLS - 1)
4265 max_len = AUTHOR_COLS - 1;
4266 draw_text(view, commit->author, max_len, TRUE, tilde_attr);
4267 col += AUTHOR_COLS;
4268 if (col >= view->width)
4269 return TRUE;
4270 }
4271
4272 if (opt_rev_graph && commit->graph_size) {
4273 size_t graph_size = view->width - col;
4274 size_t i;
4275
4276 if (type != LINE_CURSOR)
4277 wattrset(view->win, get_line_attr(LINE_MAIN_REVGRAPH));
4278 wmove(view->win, lineno, col);
4279 if (graph_size > commit->graph_size)
4280 graph_size = commit->graph_size;
4281 /* Using waddch() instead of waddnstr() ensures that
4282 * they'll be rendered correctly for the cursor line. */
4283 for (i = 0; i < graph_size; i++)
4284 waddch(view->win, commit->graph[i]);
4285
4286 col += commit->graph_size + 1;
4287 if (col >= view->width)
4288 return TRUE;
4289 waddch(view->win, ' ');
4290 }
4291 if (type != LINE_CURSOR)
4292 wattrset(view->win, A_NORMAL);
4293
4294 wmove(view->win, lineno, col);
4295
4296 if (opt_show_refs && commit->refs) {
4297 size_t i = 0;
4298
4299 do {
4300 if (type == LINE_CURSOR)
4301 ;
4302 else if (commit->refs[i]->ltag)
4303 wattrset(view->win, get_line_attr(LINE_MAIN_LOCAL_TAG));
4304 else if (commit->refs[i]->tag)
4305 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
4306 else if (commit->refs[i]->remote)
4307 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
4308 else
4309 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
4310
4311 col += draw_text(view, "[", view->width - col, TRUE, tilde_attr);
4312 col += draw_text(view, commit->refs[i]->name, view->width - col,
4313 TRUE, tilde_attr);
4314 col += draw_text(view, "]", view->width - col, TRUE, tilde_attr);
4315 if (type != LINE_CURSOR)
4316 wattrset(view->win, A_NORMAL);
4317 col += draw_text(view, " ", view->width - col, TRUE, tilde_attr);
4318 if (col >= view->width)
4319 return TRUE;
4320 } while (commit->refs[i++]->next);
4321 }
4322
4323 if (type != LINE_CURSOR)
4324 wattrset(view->win, get_line_attr(type));
4325
4326 draw_text(view, commit->title, view->width - col, TRUE, tilde_attr);
4327 return TRUE;
4328 }
4329
4330 /* Reads git log --pretty=raw output and parses it into the commit struct. */
4331 static bool
4332 main_read(struct view *view, char *line)
4333 {
4334 static struct rev_graph *graph = graph_stacks;
4335 enum line_type type;
4336 struct commit *commit;
4337
4338 if (!line) {
4339 update_rev_graph(graph);
4340 return TRUE;
4341 }
4342
4343 type = get_line_type(line);
4344 if (type == LINE_COMMIT) {
4345 commit = calloc(1, sizeof(struct commit));
4346 if (!commit)
4347 return FALSE;
4348
4349 line += STRING_SIZE("commit ");
4350 if (*line == '-') {
4351 graph->boundary = 1;
4352 line++;
4353 }
4354
4355 string_copy_rev(commit->id, line);
4356 commit->refs = get_refs(commit->id);
4357 graph->commit = commit;
4358 add_line_data(view, commit, LINE_MAIN_COMMIT);
4359
4360 while ((line = strchr(line, ' '))) {
4361 line++;
4362 push_rev_graph(graph->parents, line);
4363 commit->has_parents = TRUE;
4364 }
4365 return TRUE;
4366 }
4367
4368 if (!view->lines)
4369 return TRUE;
4370 commit = view->line[view->lines - 1].data;
4371
4372 switch (type) {
4373 case LINE_PARENT:
4374 if (commit->has_parents)
4375 break;
4376 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
4377 break;
4378
4379 case LINE_AUTHOR:
4380 {
4381 /* Parse author lines where the name may be empty:
4382 * author <email@address.tld> 1138474660 +0100
4383 */
4384 char *ident = line + STRING_SIZE("author ");
4385 char *nameend = strchr(ident, '<');
4386 char *emailend = strchr(ident, '>');
4387
4388 if (!nameend || !emailend)
4389 break;
4390
4391 update_rev_graph(graph);
4392 graph = graph->next;
4393
4394 *nameend = *emailend = 0;
4395 ident = chomp_string(ident);
4396 if (!*ident) {
4397 ident = chomp_string(nameend + 1);
4398 if (!*ident)
4399 ident = "Unknown";
4400 }
4401
4402 string_ncopy(commit->author, ident, strlen(ident));
4403
4404 /* Parse epoch and timezone */
4405 if (emailend[1] == ' ') {
4406 char *secs = emailend + 2;
4407 char *zone = strchr(secs, ' ');
4408 time_t time = (time_t) atol(secs);
4409
4410 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
4411 long tz;
4412
4413 zone++;
4414 tz = ('0' - zone[1]) * 60 * 60 * 10;
4415 tz += ('0' - zone[2]) * 60 * 60;
4416 tz += ('0' - zone[3]) * 60;
4417 tz += ('0' - zone[4]) * 60;
4418
4419 if (zone[0] == '-')
4420 tz = -tz;
4421
4422 time -= tz;
4423 }
4424
4425 gmtime_r(&time, &commit->time);
4426 }
4427 break;
4428 }
4429 default:
4430 /* Fill in the commit title if it has not already been set. */
4431 if (commit->title[0])
4432 break;
4433
4434 /* Require titles to start with a non-space character at the
4435 * offset used by git log. */
4436 if (strncmp(line, " ", 4))
4437 break;
4438 line += 4;
4439 /* Well, if the title starts with a whitespace character,
4440 * try to be forgiving. Otherwise we end up with no title. */
4441 while (isspace(*line))
4442 line++;
4443 if (*line == '\0')
4444 break;
4445 /* FIXME: More graceful handling of titles; append "..." to
4446 * shortened titles, etc. */
4447
4448 string_ncopy(commit->title, line, strlen(line));
4449 }
4450
4451 return TRUE;
4452 }
4453
4454 static enum request
4455 main_request(struct view *view, enum request request, struct line *line)
4456 {
4457 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4458
4459 if (request == REQ_ENTER)
4460 open_view(view, REQ_VIEW_DIFF, flags);
4461 else
4462 return request;
4463
4464 return REQ_NONE;
4465 }
4466
4467 static bool
4468 main_grep(struct view *view, struct line *line)
4469 {
4470 struct commit *commit = line->data;
4471 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
4472 char buf[DATE_COLS + 1];
4473 regmatch_t pmatch;
4474
4475 for (state = S_TITLE; state < S_END; state++) {
4476 char *text;
4477
4478 switch (state) {
4479 case S_TITLE: text = commit->title; break;
4480 case S_AUTHOR: text = commit->author; break;
4481 case S_DATE:
4482 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
4483 continue;
4484 text = buf;
4485 break;
4486
4487 default:
4488 return FALSE;
4489 }
4490
4491 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4492 return TRUE;
4493 }
4494
4495 return FALSE;
4496 }
4497
4498 static void
4499 main_select(struct view *view, struct line *line)
4500 {
4501 struct commit *commit = line->data;
4502
4503 string_copy_rev(view->ref, commit->id);
4504 string_copy_rev(ref_commit, view->ref);
4505 }
4506
4507 static struct view_ops main_ops = {
4508 "commit",
4509 NULL,
4510 main_read,
4511 main_draw,
4512 main_request,
4513 main_grep,
4514 main_select,
4515 };
4516
4517
4518 /*
4519 * Unicode / UTF-8 handling
4520 *
4521 * NOTE: Much of the following code for dealing with unicode is derived from
4522 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
4523 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
4524 */
4525
4526 /* I've (over)annotated a lot of code snippets because I am not entirely
4527 * confident that the approach taken by this small UTF-8 interface is correct.
4528 * --jonas */
4529
4530 static inline int
4531 unicode_width(unsigned long c)
4532 {
4533 if (c >= 0x1100 &&
4534 (c <= 0x115f /* Hangul Jamo */
4535 || c == 0x2329
4536 || c == 0x232a
4537 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
4538 /* CJK ... Yi */
4539 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
4540 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
4541 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
4542 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
4543 || (c >= 0xffe0 && c <= 0xffe6)
4544 || (c >= 0x20000 && c <= 0x2fffd)
4545 || (c >= 0x30000 && c <= 0x3fffd)))
4546 return 2;
4547
4548 if (c == '\t')
4549 return opt_tab_size;
4550
4551 return 1;
4552 }
4553
4554 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
4555 * Illegal bytes are set one. */
4556 static const unsigned char utf8_bytes[256] = {
4557 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,
4558 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,
4559 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,
4560 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,
4561 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,
4562 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,
4563 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,
4564 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,
4565 };
4566
4567 /* Decode UTF-8 multi-byte representation into a unicode character. */
4568 static inline unsigned long
4569 utf8_to_unicode(const char *string, size_t length)
4570 {
4571 unsigned long unicode;
4572
4573 switch (length) {
4574 case 1:
4575 unicode = string[0];
4576 break;
4577 case 2:
4578 unicode = (string[0] & 0x1f) << 6;
4579 unicode += (string[1] & 0x3f);
4580 break;
4581 case 3:
4582 unicode = (string[0] & 0x0f) << 12;
4583 unicode += ((string[1] & 0x3f) << 6);
4584 unicode += (string[2] & 0x3f);
4585 break;
4586 case 4:
4587 unicode = (string[0] & 0x0f) << 18;
4588 unicode += ((string[1] & 0x3f) << 12);
4589 unicode += ((string[2] & 0x3f) << 6);
4590 unicode += (string[3] & 0x3f);
4591 break;
4592 case 5:
4593 unicode = (string[0] & 0x0f) << 24;
4594 unicode += ((string[1] & 0x3f) << 18);
4595 unicode += ((string[2] & 0x3f) << 12);
4596 unicode += ((string[3] & 0x3f) << 6);
4597 unicode += (string[4] & 0x3f);
4598 break;
4599 case 6:
4600 unicode = (string[0] & 0x01) << 30;
4601 unicode += ((string[1] & 0x3f) << 24);
4602 unicode += ((string[2] & 0x3f) << 18);
4603 unicode += ((string[3] & 0x3f) << 12);
4604 unicode += ((string[4] & 0x3f) << 6);
4605 unicode += (string[5] & 0x3f);
4606 break;
4607 default:
4608 die("Invalid unicode length");
4609 }
4610
4611 /* Invalid characters could return the special 0xfffd value but NUL
4612 * should be just as good. */
4613 return unicode > 0xffff ? 0 : unicode;
4614 }
4615
4616 /* Calculates how much of string can be shown within the given maximum width
4617 * and sets trimmed parameter to non-zero value if all of string could not be
4618 * shown. If the reserve flag is TRUE, it will reserve at least one
4619 * trailing character, which can be useful when drawing a delimiter.
4620 *
4621 * Returns the number of bytes to output from string to satisfy max_width. */
4622 static size_t
4623 utf8_length(const char *string, size_t max_width, int *trimmed, bool reserve)
4624 {
4625 const char *start = string;
4626 const char *end = strchr(string, '\0');
4627 unsigned char last_bytes = 0;
4628 size_t width = 0;
4629
4630 *trimmed = 0;
4631
4632 while (string < end) {
4633 int c = *(unsigned char *) string;
4634 unsigned char bytes = utf8_bytes[c];
4635 size_t ucwidth;
4636 unsigned long unicode;
4637
4638 if (string + bytes > end)
4639 break;
4640
4641 /* Change representation to figure out whether
4642 * it is a single- or double-width character. */
4643
4644 unicode = utf8_to_unicode(string, bytes);
4645 /* FIXME: Graceful handling of invalid unicode character. */
4646 if (!unicode)
4647 break;
4648
4649 ucwidth = unicode_width(unicode);
4650 width += ucwidth;
4651 if (width > max_width) {
4652 *trimmed = 1;
4653 if (reserve && width - ucwidth == max_width) {
4654 string -= last_bytes;
4655 }
4656 break;
4657 }
4658
4659 string += bytes;
4660 last_bytes = bytes;
4661 }
4662
4663 return string - start;
4664 }
4665
4666
4667 /*
4668 * Status management
4669 */
4670
4671 /* Whether or not the curses interface has been initialized. */
4672 static bool cursed = FALSE;
4673
4674 /* The status window is used for polling keystrokes. */
4675 static WINDOW *status_win;
4676
4677 static bool status_empty = TRUE;
4678
4679 /* Update status and title window. */
4680 static void
4681 report(const char *msg, ...)
4682 {
4683 struct view *view = display[current_view];
4684
4685 if (input_mode)
4686 return;
4687
4688 if (!view) {
4689 char buf[SIZEOF_STR];
4690 va_list args;
4691
4692 va_start(args, msg);
4693 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
4694 buf[sizeof(buf) - 1] = 0;
4695 buf[sizeof(buf) - 2] = '.';
4696 buf[sizeof(buf) - 3] = '.';
4697 buf[sizeof(buf) - 4] = '.';
4698 }
4699 va_end(args);
4700 die("%s", buf);
4701 }
4702
4703 if (!status_empty || *msg) {
4704 va_list args;
4705
4706 va_start(args, msg);
4707
4708 wmove(status_win, 0, 0);
4709 if (*msg) {
4710 vwprintw(status_win, msg, args);
4711 status_empty = FALSE;
4712 } else {
4713 status_empty = TRUE;
4714 }
4715 wclrtoeol(status_win);
4716 wrefresh(status_win);
4717
4718 va_end(args);
4719 }
4720
4721 update_view_title(view);
4722 update_display_cursor(view);
4723 }
4724
4725 /* Controls when nodelay should be in effect when polling user input. */
4726 static void
4727 set_nonblocking_input(bool loading)
4728 {
4729 static unsigned int loading_views;
4730
4731 if ((loading == FALSE && loading_views-- == 1) ||
4732 (loading == TRUE && loading_views++ == 0))
4733 nodelay(status_win, loading);
4734 }
4735
4736 static void
4737 init_display(void)
4738 {
4739 int x, y;
4740
4741 /* Initialize the curses library */
4742 if (isatty(STDIN_FILENO)) {
4743 cursed = !!initscr();
4744 } else {
4745 /* Leave stdin and stdout alone when acting as a pager. */
4746 FILE *io = fopen("/dev/tty", "r+");
4747
4748 if (!io)
4749 die("Failed to open /dev/tty");
4750 cursed = !!newterm(NULL, io, io);
4751 }
4752
4753 if (!cursed)
4754 die("Failed to initialize curses");
4755
4756 nonl(); /* Tell curses not to do NL->CR/NL on output */
4757 cbreak(); /* Take input chars one at a time, no wait for \n */
4758 noecho(); /* Don't echo input */
4759 leaveok(stdscr, TRUE);
4760
4761 if (has_colors())
4762 init_colors();
4763
4764 getmaxyx(stdscr, y, x);
4765 status_win = newwin(1, 0, y - 1, 0);
4766 if (!status_win)
4767 die("Failed to create status window");
4768
4769 /* Enable keyboard mapping */
4770 keypad(status_win, TRUE);
4771 wbkgdset(status_win, get_line_attr(LINE_STATUS));
4772 }
4773
4774 static char *
4775 read_prompt(const char *prompt)
4776 {
4777 enum { READING, STOP, CANCEL } status = READING;
4778 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
4779 int pos = 0;
4780
4781 while (status == READING) {
4782 struct view *view;
4783 int i, key;
4784
4785 input_mode = TRUE;
4786
4787 foreach_view (view, i)
4788 update_view(view);
4789
4790 input_mode = FALSE;
4791
4792 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
4793 wclrtoeol(status_win);
4794
4795 /* Refresh, accept single keystroke of input */
4796 key = wgetch(status_win);
4797 switch (key) {
4798 case KEY_RETURN:
4799 case KEY_ENTER:
4800 case '\n':
4801 status = pos ? STOP : CANCEL;
4802 break;
4803
4804 case KEY_BACKSPACE:
4805 if (pos > 0)
4806 pos--;
4807 else
4808 status = CANCEL;
4809 break;
4810
4811 case KEY_ESC:
4812 status = CANCEL;
4813 break;
4814
4815 case ERR:
4816 break;
4817
4818 default:
4819 if (pos >= sizeof(buf)) {
4820 report("Input string too long");
4821 return NULL;
4822 }
4823
4824 if (isprint(key))
4825 buf[pos++] = (char) key;
4826 }
4827 }
4828
4829 /* Clear the status window */
4830 status_empty = FALSE;
4831 report("");
4832
4833 if (status == CANCEL)
4834 return NULL;
4835
4836 buf[pos++] = 0;
4837
4838 return buf;
4839 }
4840
4841 /*
4842 * Repository references
4843 */
4844
4845 static struct ref *refs = NULL;
4846 static size_t refs_alloc = 0;
4847 static size_t refs_size = 0;
4848
4849 /* Id <-> ref store */
4850 static struct ref ***id_refs = NULL;
4851 static size_t id_refs_alloc = 0;
4852 static size_t id_refs_size = 0;
4853
4854 static struct ref **
4855 get_refs(char *id)
4856 {
4857 struct ref ***tmp_id_refs;
4858 struct ref **ref_list = NULL;
4859 size_t ref_list_alloc = 0;
4860 size_t ref_list_size = 0;
4861 size_t i;
4862
4863 for (i = 0; i < id_refs_size; i++)
4864 if (!strcmp(id, id_refs[i][0]->id))
4865 return id_refs[i];
4866
4867 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
4868 sizeof(*id_refs));
4869 if (!tmp_id_refs)
4870 return NULL;
4871
4872 id_refs = tmp_id_refs;
4873
4874 for (i = 0; i < refs_size; i++) {
4875 struct ref **tmp;
4876
4877 if (strcmp(id, refs[i].id))
4878 continue;
4879
4880 tmp = realloc_items(ref_list, &ref_list_alloc,
4881 ref_list_size + 1, sizeof(*ref_list));
4882 if (!tmp) {
4883 if (ref_list)
4884 free(ref_list);
4885 return NULL;
4886 }
4887
4888 ref_list = tmp;
4889 if (ref_list_size > 0)
4890 ref_list[ref_list_size - 1]->next = 1;
4891 ref_list[ref_list_size] = &refs[i];
4892
4893 /* XXX: The properties of the commit chains ensures that we can
4894 * safely modify the shared ref. The repo references will
4895 * always be similar for the same id. */
4896 ref_list[ref_list_size]->next = 0;
4897 ref_list_size++;
4898 }
4899
4900 if (ref_list)
4901 id_refs[id_refs_size++] = ref_list;
4902
4903 return ref_list;
4904 }
4905
4906 static int
4907 read_ref(char *id, size_t idlen, char *name, size_t namelen)
4908 {
4909 struct ref *ref;
4910 bool tag = FALSE;
4911 bool ltag = FALSE;
4912 bool remote = FALSE;
4913 bool check_replace = FALSE;
4914
4915 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
4916 if (!strcmp(name + namelen - 3, "^{}")) {
4917 namelen -= 3;
4918 name[namelen] = 0;
4919 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
4920 check_replace = TRUE;
4921 } else {
4922 ltag = TRUE;
4923 }
4924
4925 tag = TRUE;
4926 namelen -= STRING_SIZE("refs/tags/");
4927 name += STRING_SIZE("refs/tags/");
4928
4929 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
4930 remote = TRUE;
4931 namelen -= STRING_SIZE("refs/remotes/");
4932 name += STRING_SIZE("refs/remotes/");
4933
4934 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
4935 namelen -= STRING_SIZE("refs/heads/");
4936 name += STRING_SIZE("refs/heads/");
4937
4938 } else if (!strcmp(name, "HEAD")) {
4939 return OK;
4940 }
4941
4942 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
4943 /* it's an annotated tag, replace the previous sha1 with the
4944 * resolved commit id; relies on the fact git-ls-remote lists
4945 * the commit id of an annotated tag right beofre the commit id
4946 * it points to. */
4947 refs[refs_size - 1].ltag = ltag;
4948 string_copy_rev(refs[refs_size - 1].id, id);
4949
4950 return OK;
4951 }
4952 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
4953 if (!refs)
4954 return ERR;
4955
4956 ref = &refs[refs_size++];
4957 ref->name = malloc(namelen + 1);
4958 if (!ref->name)
4959 return ERR;
4960
4961 strncpy(ref->name, name, namelen);
4962 ref->name[namelen] = 0;
4963 ref->tag = tag;
4964 ref->ltag = ltag;
4965 ref->remote = remote;
4966 string_copy_rev(ref->id, id);
4967
4968 return OK;
4969 }
4970
4971 static int
4972 load_refs(void)
4973 {
4974 const char *cmd_env = getenv("TIG_LS_REMOTE");
4975 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
4976
4977 return read_properties(popen(cmd, "r"), "\t", read_ref);
4978 }
4979
4980 static int
4981 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
4982 {
4983 if (!strcmp(name, "i18n.commitencoding"))
4984 string_ncopy(opt_encoding, value, valuelen);
4985
4986 if (!strcmp(name, "core.editor"))
4987 string_ncopy(opt_editor, value, valuelen);
4988
4989 return OK;
4990 }
4991
4992 static int
4993 load_repo_config(void)
4994 {
4995 return read_properties(popen(GIT_CONFIG " --list", "r"),
4996 "=", read_repo_config_option);
4997 }
4998
4999 static int
5000 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
5001 {
5002 if (!opt_git_dir[0]) {
5003 string_ncopy(opt_git_dir, name, namelen);
5004
5005 } else if (opt_is_inside_work_tree == -1) {
5006 /* This can be 3 different values depending on the
5007 * version of git being used. If git-rev-parse does not
5008 * understand --is-inside-work-tree it will simply echo
5009 * the option else either "true" or "false" is printed.
5010 * Default to true for the unknown case. */
5011 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
5012
5013 } else {
5014 string_ncopy(opt_cdup, name, namelen);
5015 }
5016
5017 return OK;
5018 }
5019
5020 /* XXX: The line outputted by "--show-cdup" can be empty so the option
5021 * must be the last one! */
5022 static int
5023 load_repo_info(void)
5024 {
5025 return read_properties(popen("git rev-parse --git-dir --is-inside-work-tree --show-cdup 2>/dev/null", "r"),
5026 "=", read_repo_info);
5027 }
5028
5029 static int
5030 read_properties(FILE *pipe, const char *separators,
5031 int (*read_property)(char *, size_t, char *, size_t))
5032 {
5033 char buffer[BUFSIZ];
5034 char *name;
5035 int state = OK;
5036
5037 if (!pipe)
5038 return ERR;
5039
5040 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
5041 char *value;
5042 size_t namelen;
5043 size_t valuelen;
5044
5045 name = chomp_string(name);
5046 namelen = strcspn(name, separators);
5047
5048 if (name[namelen]) {
5049 name[namelen] = 0;
5050 value = chomp_string(name + namelen + 1);
5051 valuelen = strlen(value);
5052
5053 } else {
5054 value = "";
5055 valuelen = 0;
5056 }
5057
5058 state = read_property(name, namelen, value, valuelen);
5059 }
5060
5061 if (state != ERR && ferror(pipe))
5062 state = ERR;
5063
5064 pclose(pipe);
5065
5066 return state;
5067 }
5068
5069
5070 /*
5071 * Main
5072 */
5073
5074 static void __NORETURN
5075 quit(int sig)
5076 {
5077 /* XXX: Restore tty modes and let the OS cleanup the rest! */
5078 if (cursed)
5079 endwin();
5080 exit(0);
5081 }
5082
5083 static void __NORETURN
5084 die(const char *err, ...)
5085 {
5086 va_list args;
5087
5088 endwin();
5089
5090 va_start(args, err);
5091 fputs("tig: ", stderr);
5092 vfprintf(stderr, err, args);
5093 fputs("\n", stderr);
5094 va_end(args);
5095
5096 exit(1);
5097 }
5098
5099 static void
5100 warn(const char *msg, ...)
5101 {
5102 va_list args;
5103
5104 va_start(args, msg);
5105 fputs("tig warning: ", stderr);
5106 vfprintf(stderr, msg, args);
5107 fputs("\n", stderr);
5108 va_end(args);
5109 }
5110
5111 int
5112 main(int argc, char *argv[])
5113 {
5114 struct view *view;
5115 enum request request;
5116 size_t i;
5117
5118 signal(SIGINT, quit);
5119
5120 if (setlocale(LC_ALL, "")) {
5121 char *codeset = nl_langinfo(CODESET);
5122
5123 string_ncopy(opt_codeset, codeset, strlen(codeset));
5124 }
5125
5126 if (load_repo_info() == ERR)
5127 die("Failed to load repo info.");
5128
5129 if (load_options() == ERR)
5130 die("Failed to load user config.");
5131
5132 /* Load the repo config file so options can be overwritten from
5133 * the command line. */
5134 if (load_repo_config() == ERR)
5135 die("Failed to load repo config.");
5136
5137 if (!parse_options(argc, argv))
5138 return 0;
5139
5140 /* Require a git repository unless when running in pager mode. */
5141 if (!opt_git_dir[0])
5142 die("Not a git repository");
5143
5144 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
5145 opt_utf8 = FALSE;
5146
5147 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
5148 opt_iconv = iconv_open(opt_codeset, opt_encoding);
5149 if (opt_iconv == ICONV_NONE)
5150 die("Failed to initialize character set conversion");
5151 }
5152
5153 if (load_refs() == ERR)
5154 die("Failed to load refs.");
5155
5156 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
5157 view->cmd_env = getenv(view->cmd_env);
5158
5159 request = opt_request;
5160
5161 init_display();
5162
5163 while (view_driver(display[current_view], request)) {
5164 int key;
5165 int i;
5166
5167 foreach_view (view, i)
5168 update_view(view);
5169
5170 /* Refresh, accept single keystroke of input */
5171 key = wgetch(status_win);
5172
5173 /* wgetch() with nodelay() enabled returns ERR when there's no
5174 * input. */
5175 if (key == ERR) {
5176 request = REQ_NONE;
5177 continue;
5178 }
5179
5180 request = get_keybinding(display[current_view]->keymap, key);
5181
5182 /* Some low-level request handling. This keeps access to
5183 * status_win restricted. */
5184 switch (request) {
5185 case REQ_PROMPT:
5186 {
5187 char *cmd = read_prompt(":");
5188
5189 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
5190 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
5191 opt_request = REQ_VIEW_DIFF;
5192 } else {
5193 opt_request = REQ_VIEW_PAGER;
5194 }
5195 break;
5196 }
5197
5198 request = REQ_NONE;
5199 break;
5200 }
5201 case REQ_SEARCH:
5202 case REQ_SEARCH_BACK:
5203 {
5204 const char *prompt = request == REQ_SEARCH
5205 ? "/" : "?";
5206 char *search = read_prompt(prompt);
5207
5208 if (search)
5209 string_ncopy(opt_search, search, strlen(search));
5210 else
5211 request = REQ_NONE;
5212 break;
5213 }
5214 case REQ_SCREEN_RESIZE:
5215 {
5216 int height, width;
5217
5218 getmaxyx(stdscr, height, width);
5219
5220 /* Resize the status view and let the view driver take
5221 * care of resizing the displayed views. */
5222 wresize(status_win, 1, width);
5223 mvwin(status_win, height - 1, 0);
5224 wrefresh(status_win);
5225 break;
5226 }
5227 default:
5228 break;
5229 }
5230 }
5231
5232 quit(0);
5233
5234 return 0;
5235 }
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