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Blame: remove unused member of struct blame
[tig.git] / tig.c
blobf52c8a4505d1c894f83b736b2384961d73f663df
1 /* Copyright (c) 2006-2008 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 #ifdef HAVE_NCURSESW_NCURSES_H
49 #include <ncursesw/ncurses.h>
50 #else
51 #ifdef HAVE_NCURSES_NCURSES_H
52 #include <ncurses/ncurses.h>
53 #else
54 #include <ncurses.h>
55 #endif
56 #endif
57
58 #if __GNUC__ >= 3
59 #define __NORETURN __attribute__((__noreturn__))
60 #else
61 #define __NORETURN
62 #endif
63
64 static void __NORETURN die(const char *err, ...);
65 static void warn(const char *msg, ...);
66 static void report(const char *msg, ...);
67 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, size_t, char *, size_t));
68 static void set_nonblocking_input(bool loading);
69 static size_t utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve);
70 static bool prompt_yesno(const char *prompt);
71 static int load_refs(void);
72
73 #define ABS(x) ((x) >= 0 ? (x) : -(x))
74 #define MIN(x, y) ((x) < (y) ? (x) : (y))
75
76 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
77 #define STRING_SIZE(x) (sizeof(x) - 1)
78
79 #define SIZEOF_STR 1024 /* Default string size. */
80 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
81 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL. */
82 #define SIZEOF_ARG 32 /* Default argument array size. */
83
84 /* Revision graph */
85
86 #define REVGRAPH_INIT 'I'
87 #define REVGRAPH_MERGE 'M'
88 #define REVGRAPH_BRANCH '+'
89 #define REVGRAPH_COMMIT '*'
90 #define REVGRAPH_BOUND '^'
91
92 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
93
94 /* This color name can be used to refer to the default term colors. */
95 #define COLOR_DEFAULT (-1)
96
97 #define ICONV_NONE ((iconv_t) -1)
98 #ifndef ICONV_CONST
99 #define ICONV_CONST /* nothing */
100 #endif
101
102 /* The format and size of the date column in the main view. */
103 #define DATE_FORMAT "%Y-%m-%d %H:%M"
104 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
105
106 #define AUTHOR_COLS 20
107 #define ID_COLS 8
108
109 /* The default interval between line numbers. */
110 #define NUMBER_INTERVAL 5
111
112 #define TAB_SIZE 8
113
114 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
115
116 #define NULL_ID "0000000000000000000000000000000000000000"
117
118 #ifndef GIT_CONFIG
119 #define GIT_CONFIG "config"
120 #endif
121
122 #define TIG_LS_REMOTE \
123 "git ls-remote . 2>/dev/null"
124
125 #define TIG_DIFF_CMD \
126 "git show --pretty=fuller --no-color --root --patch-with-stat --find-copies-harder -C %s 2>/dev/null"
127
128 #define TIG_LOG_CMD \
129 "git log --no-color --cc --stat -n100 %s 2>/dev/null"
130
131 #define TIG_MAIN_BASE \
132 "git log --no-color --pretty=raw --parents --topo-order"
133
134 #define TIG_MAIN_CMD \
135 TIG_MAIN_BASE " %s 2>/dev/null"
136
137 #define TIG_TREE_CMD \
138 "git ls-tree %s %s"
139
140 #define TIG_BLOB_CMD \
141 "git cat-file blob %s"
142
143 /* XXX: Needs to be defined to the empty string. */
144 #define TIG_HELP_CMD ""
145 #define TIG_PAGER_CMD ""
146 #define TIG_STATUS_CMD ""
147 #define TIG_STAGE_CMD ""
148 #define TIG_BLAME_CMD ""
149
150 /* Some ascii-shorthands fitted into the ncurses namespace. */
151 #define KEY_TAB '\t'
152 #define KEY_RETURN '\r'
153 #define KEY_ESC 27
154
155
156 struct ref {
157 char *name; /* Ref name; tag or head names are shortened. */
158 char id[SIZEOF_REV]; /* Commit SHA1 ID */
159 unsigned int head:1; /* Is it the current HEAD? */
160 unsigned int tag:1; /* Is it a tag? */
161 unsigned int ltag:1; /* If so, is the tag local? */
162 unsigned int remote:1; /* Is it a remote ref? */
163 unsigned int tracked:1; /* Is it the remote for the current HEAD? */
164 unsigned int next:1; /* For ref lists: are there more refs? */
165 };
166
167 static struct ref **get_refs(const char *id);
168
169 struct int_map {
170 const char *name;
171 int namelen;
172 int value;
173 };
174
175 static int
176 set_from_int_map(struct int_map *map, size_t map_size,
177 int *value, const char *name, int namelen)
178 {
179
180 int i;
181
182 for (i = 0; i < map_size; i++)
183 if (namelen == map[i].namelen &&
184 !strncasecmp(name, map[i].name, namelen)) {
185 *value = map[i].value;
186 return OK;
187 }
188
189 return ERR;
190 }
191
192
193 /*
194 * String helpers
195 */
196
197 static inline void
198 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
199 {
200 if (srclen > dstlen - 1)
201 srclen = dstlen - 1;
202
203 strncpy(dst, src, srclen);
204 dst[srclen] = 0;
205 }
206
207 /* Shorthands for safely copying into a fixed buffer. */
208
209 #define string_copy(dst, src) \
210 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
211
212 #define string_ncopy(dst, src, srclen) \
213 string_ncopy_do(dst, sizeof(dst), src, srclen)
214
215 #define string_copy_rev(dst, src) \
216 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
217
218 #define string_add(dst, from, src) \
219 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
220
221 static char *
222 chomp_string(char *name)
223 {
224 int namelen;
225
226 while (isspace(*name))
227 name++;
228
229 namelen = strlen(name) - 1;
230 while (namelen > 0 && isspace(name[namelen]))
231 name[namelen--] = 0;
232
233 return name;
234 }
235
236 static bool
237 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
238 {
239 va_list args;
240 size_t pos = bufpos ? *bufpos : 0;
241
242 va_start(args, fmt);
243 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
244 va_end(args);
245
246 if (bufpos)
247 *bufpos = pos;
248
249 return pos >= bufsize ? FALSE : TRUE;
250 }
251
252 #define string_format(buf, fmt, args...) \
253 string_nformat(buf, sizeof(buf), NULL, fmt, args)
254
255 #define string_format_from(buf, from, fmt, args...) \
256 string_nformat(buf, sizeof(buf), from, fmt, args)
257
258 static int
259 string_enum_compare(const char *str1, const char *str2, int len)
260 {
261 size_t i;
262
263 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
264
265 /* Diff-Header == DIFF_HEADER */
266 for (i = 0; i < len; i++) {
267 if (toupper(str1[i]) == toupper(str2[i]))
268 continue;
269
270 if (string_enum_sep(str1[i]) &&
271 string_enum_sep(str2[i]))
272 continue;
273
274 return str1[i] - str2[i];
275 }
276
277 return 0;
278 }
279
280 #define prefixcmp(str1, str2) \
281 strncmp(str1, str2, STRING_SIZE(str2))
282
283 static inline int
284 suffixcmp(const char *str, int slen, const char *suffix)
285 {
286 size_t len = slen >= 0 ? slen : strlen(str);
287 size_t suffixlen = strlen(suffix);
288
289 return suffixlen < len ? strcmp(str + len - suffixlen, suffix) : -1;
290 }
291
292 /* Shell quoting
293 *
294 * NOTE: The following is a slightly modified copy of the git project's shell
295 * quoting routines found in the quote.c file.
296 *
297 * Help to copy the thing properly quoted for the shell safety. any single
298 * quote is replaced with '\'', any exclamation point is replaced with '\!',
299 * and the whole thing is enclosed in a
300 *
301 * E.g.
302 * original sq_quote result
303 * name ==> name ==> 'name'
304 * a b ==> a b ==> 'a b'
305 * a'b ==> a'\''b ==> 'a'\''b'
306 * a!b ==> a'\!'b ==> 'a'\!'b'
307 */
308
309 static size_t
310 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
311 {
312 char c;
313
314 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
315
316 BUFPUT('\'');
317 while ((c = *src++)) {
318 if (c == '\'' || c == '!') {
319 BUFPUT('\'');
320 BUFPUT('\\');
321 BUFPUT(c);
322 BUFPUT('\'');
323 } else {
324 BUFPUT(c);
325 }
326 }
327 BUFPUT('\'');
328
329 if (bufsize < SIZEOF_STR)
330 buf[bufsize] = 0;
331
332 return bufsize;
333 }
334
335
336 /*
337 * User requests
338 */
339
340 #define REQ_INFO \
341 /* XXX: Keep the view request first and in sync with views[]. */ \
342 REQ_GROUP("View switching") \
343 REQ_(VIEW_MAIN, "Show main view"), \
344 REQ_(VIEW_DIFF, "Show diff view"), \
345 REQ_(VIEW_LOG, "Show log view"), \
346 REQ_(VIEW_TREE, "Show tree view"), \
347 REQ_(VIEW_BLOB, "Show blob view"), \
348 REQ_(VIEW_BLAME, "Show blame view"), \
349 REQ_(VIEW_HELP, "Show help page"), \
350 REQ_(VIEW_PAGER, "Show pager view"), \
351 REQ_(VIEW_STATUS, "Show status view"), \
352 REQ_(VIEW_STAGE, "Show stage view"), \
353 \
354 REQ_GROUP("View manipulation") \
355 REQ_(ENTER, "Enter current line and scroll"), \
356 REQ_(NEXT, "Move to next"), \
357 REQ_(PREVIOUS, "Move to previous"), \
358 REQ_(VIEW_NEXT, "Move focus to next view"), \
359 REQ_(REFRESH, "Reload and refresh"), \
360 REQ_(MAXIMIZE, "Maximize the current view"), \
361 REQ_(VIEW_CLOSE, "Close the current view"), \
362 REQ_(QUIT, "Close all views and quit"), \
363 \
364 REQ_GROUP("View specific requests") \
365 REQ_(STATUS_UPDATE, "Update file status"), \
366 REQ_(STATUS_REVERT, "Revert file changes"), \
367 REQ_(STATUS_MERGE, "Merge file using external tool"), \
368 REQ_(STAGE_NEXT, "Find next chunk to stage"), \
369 REQ_(TREE_PARENT, "Switch to parent directory in tree view"), \
370 \
371 REQ_GROUP("Cursor navigation") \
372 REQ_(MOVE_UP, "Move cursor one line up"), \
373 REQ_(MOVE_DOWN, "Move cursor one line down"), \
374 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
375 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
376 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
377 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
378 \
379 REQ_GROUP("Scrolling") \
380 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
381 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
382 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
383 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
384 \
385 REQ_GROUP("Searching") \
386 REQ_(SEARCH, "Search the view"), \
387 REQ_(SEARCH_BACK, "Search backwards in the view"), \
388 REQ_(FIND_NEXT, "Find next search match"), \
389 REQ_(FIND_PREV, "Find previous search match"), \
390 \
391 REQ_GROUP("Option manipulation") \
392 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
393 REQ_(TOGGLE_DATE, "Toggle date display"), \
394 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
395 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
396 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
397 \
398 REQ_GROUP("Misc") \
399 REQ_(PROMPT, "Bring up the prompt"), \
400 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
401 REQ_(SCREEN_RESIZE, "Resize the screen"), \
402 REQ_(SHOW_VERSION, "Show version information"), \
403 REQ_(STOP_LOADING, "Stop all loading views"), \
404 REQ_(EDIT, "Open in editor"), \
405 REQ_(NONE, "Do nothing")
406
407
408 /* User action requests. */
409 enum request {
410 #define REQ_GROUP(help)
411 #define REQ_(req, help) REQ_##req
412
413 /* Offset all requests to avoid conflicts with ncurses getch values. */
414 REQ_OFFSET = KEY_MAX + 1,
415 REQ_INFO
416
417 #undef REQ_GROUP
418 #undef REQ_
419 };
420
421 struct request_info {
422 enum request request;
423 const char *name;
424 int namelen;
425 const char *help;
426 };
427
428 static struct request_info req_info[] = {
429 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
430 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
431 REQ_INFO
432 #undef REQ_GROUP
433 #undef REQ_
434 };
435
436 static enum request
437 get_request(const char *name)
438 {
439 int namelen = strlen(name);
440 int i;
441
442 for (i = 0; i < ARRAY_SIZE(req_info); i++)
443 if (req_info[i].namelen == namelen &&
444 !string_enum_compare(req_info[i].name, name, namelen))
445 return req_info[i].request;
446
447 return REQ_NONE;
448 }
449
450
451 /*
452 * Options
453 */
454
455 static const char usage[] =
456 "tig " TIG_VERSION " (" __DATE__ ")\n"
457 "\n"
458 "Usage: tig [options] [revs] [--] [paths]\n"
459 " or: tig show [options] [revs] [--] [paths]\n"
460 " or: tig blame [rev] path\n"
461 " or: tig status\n"
462 " or: tig < [git command output]\n"
463 "\n"
464 "Options:\n"
465 " -v, --version Show version and exit\n"
466 " -h, --help Show help message and exit";
467
468 /* Option and state variables. */
469 static bool opt_date = TRUE;
470 static bool opt_author = TRUE;
471 static bool opt_line_number = FALSE;
472 static bool opt_line_graphics = TRUE;
473 static bool opt_rev_graph = FALSE;
474 static bool opt_show_refs = TRUE;
475 static int opt_num_interval = NUMBER_INTERVAL;
476 static int opt_tab_size = TAB_SIZE;
477 static int opt_author_cols = AUTHOR_COLS-1;
478 static char opt_cmd[SIZEOF_STR] = "";
479 static char opt_path[SIZEOF_STR] = "";
480 static char opt_file[SIZEOF_STR] = "";
481 static char opt_ref[SIZEOF_REF] = "";
482 static char opt_head[SIZEOF_REF] = "";
483 static char opt_head_rev[SIZEOF_REV] = "";
484 static char opt_remote[SIZEOF_REF] = "";
485 static FILE *opt_pipe = NULL;
486 static char opt_encoding[20] = "UTF-8";
487 static bool opt_utf8 = TRUE;
488 static char opt_codeset[20] = "UTF-8";
489 static iconv_t opt_iconv = ICONV_NONE;
490 static char opt_search[SIZEOF_STR] = "";
491 static char opt_cdup[SIZEOF_STR] = "";
492 static char opt_git_dir[SIZEOF_STR] = "";
493 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
494 static char opt_editor[SIZEOF_STR] = "";
495 static FILE *opt_tty = NULL;
496
497 #define is_initial_commit() (!*opt_head_rev)
498 #define is_head_commit(rev) (!strcmp((rev), "HEAD") || !strcmp(opt_head_rev, (rev)))
499
500 static enum request
501 parse_options(int argc, const char *argv[])
502 {
503 enum request request = REQ_VIEW_MAIN;
504 size_t buf_size;
505 const char *subcommand;
506 bool seen_dashdash = FALSE;
507 int i;
508
509 if (!isatty(STDIN_FILENO)) {
510 opt_pipe = stdin;
511 return REQ_VIEW_PAGER;
512 }
513
514 if (argc <= 1)
515 return REQ_VIEW_MAIN;
516
517 subcommand = argv[1];
518 if (!strcmp(subcommand, "status") || !strcmp(subcommand, "-S")) {
519 if (!strcmp(subcommand, "-S"))
520 warn("`-S' has been deprecated; use `tig status' instead");
521 if (argc > 2)
522 warn("ignoring arguments after `%s'", subcommand);
523 return REQ_VIEW_STATUS;
524
525 } else if (!strcmp(subcommand, "blame")) {
526 if (argc <= 2 || argc > 4)
527 die("invalid number of options to blame\n\n%s", usage);
528
529 i = 2;
530 if (argc == 4) {
531 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
532 i++;
533 }
534
535 string_ncopy(opt_file, argv[i], strlen(argv[i]));
536 return REQ_VIEW_BLAME;
537
538 } else if (!strcmp(subcommand, "show")) {
539 request = REQ_VIEW_DIFF;
540
541 } else if (!strcmp(subcommand, "log") || !strcmp(subcommand, "diff")) {
542 request = subcommand[0] == 'l' ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
543 warn("`tig %s' has been deprecated", subcommand);
544
545 } else {
546 subcommand = NULL;
547 }
548
549 if (!subcommand)
550 /* XXX: This is vulnerable to the user overriding
551 * options required for the main view parser. */
552 string_copy(opt_cmd, TIG_MAIN_BASE);
553 else
554 string_format(opt_cmd, "git %s", subcommand);
555
556 buf_size = strlen(opt_cmd);
557
558 for (i = 1 + !!subcommand; i < argc; i++) {
559 const char *opt = argv[i];
560
561 if (seen_dashdash || !strcmp(opt, "--")) {
562 seen_dashdash = TRUE;
563
564 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
565 printf("tig version %s\n", TIG_VERSION);
566 return REQ_NONE;
567
568 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
569 printf("%s\n", usage);
570 return REQ_NONE;
571 }
572
573 opt_cmd[buf_size++] = ' ';
574 buf_size = sq_quote(opt_cmd, buf_size, opt);
575 if (buf_size >= sizeof(opt_cmd))
576 die("command too long");
577 }
578
579 opt_cmd[buf_size] = 0;
580
581 return request;
582 }
583
584
585 /*
586 * Line-oriented content detection.
587 */
588
589 #define LINE_INFO \
590 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
591 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
592 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
593 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
594 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
595 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
596 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
597 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
598 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
599 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
600 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
601 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
602 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
603 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
604 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
605 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
606 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
607 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
608 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
609 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
610 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
611 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
612 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
613 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
614 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
615 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
616 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
617 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
618 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
619 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
620 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
621 LINE(DELIMITER, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
622 LINE(DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
623 LINE(LINE_NUMBER, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
624 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
625 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
626 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
627 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
628 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
629 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
630 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
631 LINE(MAIN_TRACKED, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
632 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
633 LINE(MAIN_HEAD, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
634 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
635 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
636 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
637 LINE(STAT_HEAD, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
638 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
639 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
640 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
641 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
642 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
643 LINE(BLAME_ID, "", COLOR_MAGENTA, COLOR_DEFAULT, 0)
644
645 enum line_type {
646 #define LINE(type, line, fg, bg, attr) \
647 LINE_##type
648 LINE_INFO,
649 LINE_NONE
650 #undef LINE
651 };
652
653 struct line_info {
654 const char *name; /* Option name. */
655 int namelen; /* Size of option name. */
656 const char *line; /* The start of line to match. */
657 int linelen; /* Size of string to match. */
658 int fg, bg, attr; /* Color and text attributes for the lines. */
659 };
660
661 static struct line_info line_info[] = {
662 #define LINE(type, line, fg, bg, attr) \
663 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
664 LINE_INFO
665 #undef LINE
666 };
667
668 static enum line_type
669 get_line_type(const char *line)
670 {
671 int linelen = strlen(line);
672 enum line_type type;
673
674 for (type = 0; type < ARRAY_SIZE(line_info); type++)
675 /* Case insensitive search matches Signed-off-by lines better. */
676 if (linelen >= line_info[type].linelen &&
677 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
678 return type;
679
680 return LINE_DEFAULT;
681 }
682
683 static inline int
684 get_line_attr(enum line_type type)
685 {
686 assert(type < ARRAY_SIZE(line_info));
687 return COLOR_PAIR(type) | line_info[type].attr;
688 }
689
690 static struct line_info *
691 get_line_info(const char *name)
692 {
693 size_t namelen = strlen(name);
694 enum line_type type;
695
696 for (type = 0; type < ARRAY_SIZE(line_info); type++)
697 if (namelen == line_info[type].namelen &&
698 !string_enum_compare(line_info[type].name, name, namelen))
699 return &line_info[type];
700
701 return NULL;
702 }
703
704 static void
705 init_colors(void)
706 {
707 int default_bg = line_info[LINE_DEFAULT].bg;
708 int default_fg = line_info[LINE_DEFAULT].fg;
709 enum line_type type;
710
711 start_color();
712
713 if (assume_default_colors(default_fg, default_bg) == ERR) {
714 default_bg = COLOR_BLACK;
715 default_fg = COLOR_WHITE;
716 }
717
718 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
719 struct line_info *info = &line_info[type];
720 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
721 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
722
723 init_pair(type, fg, bg);
724 }
725 }
726
727 struct line {
728 enum line_type type;
729
730 /* State flags */
731 unsigned int selected:1;
732 unsigned int dirty:1;
733
734 void *data; /* User data */
735 };
736
737
738 /*
739 * Keys
740 */
741
742 struct keybinding {
743 int alias;
744 enum request request;
745 };
746
747 static struct keybinding default_keybindings[] = {
748 /* View switching */
749 { 'm', REQ_VIEW_MAIN },
750 { 'd', REQ_VIEW_DIFF },
751 { 'l', REQ_VIEW_LOG },
752 { 't', REQ_VIEW_TREE },
753 { 'f', REQ_VIEW_BLOB },
754 { 'B', REQ_VIEW_BLAME },
755 { 'p', REQ_VIEW_PAGER },
756 { 'h', REQ_VIEW_HELP },
757 { 'S', REQ_VIEW_STATUS },
758 { 'c', REQ_VIEW_STAGE },
759
760 /* View manipulation */
761 { 'q', REQ_VIEW_CLOSE },
762 { KEY_TAB, REQ_VIEW_NEXT },
763 { KEY_RETURN, REQ_ENTER },
764 { KEY_UP, REQ_PREVIOUS },
765 { KEY_DOWN, REQ_NEXT },
766 { 'R', REQ_REFRESH },
767 { KEY_F(5), REQ_REFRESH },
768 { 'O', REQ_MAXIMIZE },
769
770 /* Cursor navigation */
771 { 'k', REQ_MOVE_UP },
772 { 'j', REQ_MOVE_DOWN },
773 { KEY_HOME, REQ_MOVE_FIRST_LINE },
774 { KEY_END, REQ_MOVE_LAST_LINE },
775 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
776 { ' ', REQ_MOVE_PAGE_DOWN },
777 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
778 { 'b', REQ_MOVE_PAGE_UP },
779 { '-', REQ_MOVE_PAGE_UP },
780
781 /* Scrolling */
782 { KEY_IC, REQ_SCROLL_LINE_UP },
783 { KEY_DC, REQ_SCROLL_LINE_DOWN },
784 { 'w', REQ_SCROLL_PAGE_UP },
785 { 's', REQ_SCROLL_PAGE_DOWN },
786
787 /* Searching */
788 { '/', REQ_SEARCH },
789 { '?', REQ_SEARCH_BACK },
790 { 'n', REQ_FIND_NEXT },
791 { 'N', REQ_FIND_PREV },
792
793 /* Misc */
794 { 'Q', REQ_QUIT },
795 { 'z', REQ_STOP_LOADING },
796 { 'v', REQ_SHOW_VERSION },
797 { 'r', REQ_SCREEN_REDRAW },
798 { '.', REQ_TOGGLE_LINENO },
799 { 'D', REQ_TOGGLE_DATE },
800 { 'A', REQ_TOGGLE_AUTHOR },
801 { 'g', REQ_TOGGLE_REV_GRAPH },
802 { 'F', REQ_TOGGLE_REFS },
803 { ':', REQ_PROMPT },
804 { 'u', REQ_STATUS_UPDATE },
805 { '!', REQ_STATUS_REVERT },
806 { 'M', REQ_STATUS_MERGE },
807 { '@', REQ_STAGE_NEXT },
808 { ',', REQ_TREE_PARENT },
809 { 'e', REQ_EDIT },
810
811 /* Using the ncurses SIGWINCH handler. */
812 { KEY_RESIZE, REQ_SCREEN_RESIZE },
813 };
814
815 #define KEYMAP_INFO \
816 KEYMAP_(GENERIC), \
817 KEYMAP_(MAIN), \
818 KEYMAP_(DIFF), \
819 KEYMAP_(LOG), \
820 KEYMAP_(TREE), \
821 KEYMAP_(BLOB), \
822 KEYMAP_(BLAME), \
823 KEYMAP_(PAGER), \
824 KEYMAP_(HELP), \
825 KEYMAP_(STATUS), \
826 KEYMAP_(STAGE)
827
828 enum keymap {
829 #define KEYMAP_(name) KEYMAP_##name
830 KEYMAP_INFO
831 #undef KEYMAP_
832 };
833
834 static struct int_map keymap_table[] = {
835 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
836 KEYMAP_INFO
837 #undef KEYMAP_
838 };
839
840 #define set_keymap(map, name) \
841 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
842
843 struct keybinding_table {
844 struct keybinding *data;
845 size_t size;
846 };
847
848 static struct keybinding_table keybindings[ARRAY_SIZE(keymap_table)];
849
850 static void
851 add_keybinding(enum keymap keymap, enum request request, int key)
852 {
853 struct keybinding_table *table = &keybindings[keymap];
854
855 table->data = realloc(table->data, (table->size + 1) * sizeof(*table->data));
856 if (!table->data)
857 die("Failed to allocate keybinding");
858 table->data[table->size].alias = key;
859 table->data[table->size++].request = request;
860 }
861
862 /* Looks for a key binding first in the given map, then in the generic map, and
863 * lastly in the default keybindings. */
864 static enum request
865 get_keybinding(enum keymap keymap, int key)
866 {
867 size_t i;
868
869 for (i = 0; i < keybindings[keymap].size; i++)
870 if (keybindings[keymap].data[i].alias == key)
871 return keybindings[keymap].data[i].request;
872
873 for (i = 0; i < keybindings[KEYMAP_GENERIC].size; i++)
874 if (keybindings[KEYMAP_GENERIC].data[i].alias == key)
875 return keybindings[KEYMAP_GENERIC].data[i].request;
876
877 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
878 if (default_keybindings[i].alias == key)
879 return default_keybindings[i].request;
880
881 return (enum request) key;
882 }
883
884
885 struct key {
886 const char *name;
887 int value;
888 };
889
890 static struct key key_table[] = {
891 { "Enter", KEY_RETURN },
892 { "Space", ' ' },
893 { "Backspace", KEY_BACKSPACE },
894 { "Tab", KEY_TAB },
895 { "Escape", KEY_ESC },
896 { "Left", KEY_LEFT },
897 { "Right", KEY_RIGHT },
898 { "Up", KEY_UP },
899 { "Down", KEY_DOWN },
900 { "Insert", KEY_IC },
901 { "Delete", KEY_DC },
902 { "Hash", '#' },
903 { "Home", KEY_HOME },
904 { "End", KEY_END },
905 { "PageUp", KEY_PPAGE },
906 { "PageDown", KEY_NPAGE },
907 { "F1", KEY_F(1) },
908 { "F2", KEY_F(2) },
909 { "F3", KEY_F(3) },
910 { "F4", KEY_F(4) },
911 { "F5", KEY_F(5) },
912 { "F6", KEY_F(6) },
913 { "F7", KEY_F(7) },
914 { "F8", KEY_F(8) },
915 { "F9", KEY_F(9) },
916 { "F10", KEY_F(10) },
917 { "F11", KEY_F(11) },
918 { "F12", KEY_F(12) },
919 };
920
921 static int
922 get_key_value(const char *name)
923 {
924 int i;
925
926 for (i = 0; i < ARRAY_SIZE(key_table); i++)
927 if (!strcasecmp(key_table[i].name, name))
928 return key_table[i].value;
929
930 if (strlen(name) == 1 && isprint(*name))
931 return (int) *name;
932
933 return ERR;
934 }
935
936 static const char *
937 get_key_name(int key_value)
938 {
939 static char key_char[] = "'X'";
940 const char *seq = NULL;
941 int key;
942
943 for (key = 0; key < ARRAY_SIZE(key_table); key++)
944 if (key_table[key].value == key_value)
945 seq = key_table[key].name;
946
947 if (seq == NULL &&
948 key_value < 127 &&
949 isprint(key_value)) {
950 key_char[1] = (char) key_value;
951 seq = key_char;
952 }
953
954 return seq ? seq : "(no key)";
955 }
956
957 static const char *
958 get_key(enum request request)
959 {
960 static char buf[BUFSIZ];
961 size_t pos = 0;
962 char *sep = "";
963 int i;
964
965 buf[pos] = 0;
966
967 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
968 struct keybinding *keybinding = &default_keybindings[i];
969
970 if (keybinding->request != request)
971 continue;
972
973 if (!string_format_from(buf, &pos, "%s%s", sep,
974 get_key_name(keybinding->alias)))
975 return "Too many keybindings!";
976 sep = ", ";
977 }
978
979 return buf;
980 }
981
982 struct run_request {
983 enum keymap keymap;
984 int key;
985 char cmd[SIZEOF_STR];
986 };
987
988 static struct run_request *run_request;
989 static size_t run_requests;
990
991 static enum request
992 add_run_request(enum keymap keymap, int key, int argc, const char **argv)
993 {
994 struct run_request *req;
995 char cmd[SIZEOF_STR];
996 size_t bufpos;
997
998 for (bufpos = 0; argc > 0; argc--, argv++)
999 if (!string_format_from(cmd, &bufpos, "%s ", *argv))
1000 return REQ_NONE;
1001
1002 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1003 if (!req)
1004 return REQ_NONE;
1005
1006 run_request = req;
1007 req = &run_request[run_requests++];
1008 string_copy(req->cmd, cmd);
1009 req->keymap = keymap;
1010 req->key = key;
1011
1012 return REQ_NONE + run_requests;
1013 }
1014
1015 static struct run_request *
1016 get_run_request(enum request request)
1017 {
1018 if (request <= REQ_NONE)
1019 return NULL;
1020 return &run_request[request - REQ_NONE - 1];
1021 }
1022
1023 static void
1024 add_builtin_run_requests(void)
1025 {
1026 struct {
1027 enum keymap keymap;
1028 int key;
1029 const char *argv[1];
1030 } reqs[] = {
1031 { KEYMAP_MAIN, 'C', { "git cherry-pick %(commit)" } },
1032 { KEYMAP_GENERIC, 'G', { "git gc" } },
1033 };
1034 int i;
1035
1036 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1037 enum request req;
1038
1039 req = add_run_request(reqs[i].keymap, reqs[i].key, 1, reqs[i].argv);
1040 if (req != REQ_NONE)
1041 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1042 }
1043 }
1044
1045 /*
1046 * User config file handling.
1047 */
1048
1049 static struct int_map color_map[] = {
1050 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
1051 COLOR_MAP(DEFAULT),
1052 COLOR_MAP(BLACK),
1053 COLOR_MAP(BLUE),
1054 COLOR_MAP(CYAN),
1055 COLOR_MAP(GREEN),
1056 COLOR_MAP(MAGENTA),
1057 COLOR_MAP(RED),
1058 COLOR_MAP(WHITE),
1059 COLOR_MAP(YELLOW),
1060 };
1061
1062 #define set_color(color, name) \
1063 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
1064
1065 static struct int_map attr_map[] = {
1066 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
1067 ATTR_MAP(NORMAL),
1068 ATTR_MAP(BLINK),
1069 ATTR_MAP(BOLD),
1070 ATTR_MAP(DIM),
1071 ATTR_MAP(REVERSE),
1072 ATTR_MAP(STANDOUT),
1073 ATTR_MAP(UNDERLINE),
1074 };
1075
1076 #define set_attribute(attr, name) \
1077 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
1078
1079 static int config_lineno;
1080 static bool config_errors;
1081 static const char *config_msg;
1082
1083 /* Wants: object fgcolor bgcolor [attr] */
1084 static int
1085 option_color_command(int argc, const char *argv[])
1086 {
1087 struct line_info *info;
1088
1089 if (argc != 3 && argc != 4) {
1090 config_msg = "Wrong number of arguments given to color command";
1091 return ERR;
1092 }
1093
1094 info = get_line_info(argv[0]);
1095 if (!info) {
1096 if (!string_enum_compare(argv[0], "main-delim", strlen("main-delim"))) {
1097 info = get_line_info("delimiter");
1098
1099 } else if (!string_enum_compare(argv[0], "main-date", strlen("main-date"))) {
1100 info = get_line_info("date");
1101
1102 } else {
1103 config_msg = "Unknown color name";
1104 return ERR;
1105 }
1106 }
1107
1108 if (set_color(&info->fg, argv[1]) == ERR ||
1109 set_color(&info->bg, argv[2]) == ERR) {
1110 config_msg = "Unknown color";
1111 return ERR;
1112 }
1113
1114 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1115 config_msg = "Unknown attribute";
1116 return ERR;
1117 }
1118
1119 return OK;
1120 }
1121
1122 static bool parse_bool(const char *s)
1123 {
1124 return (!strcmp(s, "1") || !strcmp(s, "true") ||
1125 !strcmp(s, "yes")) ? TRUE : FALSE;
1126 }
1127
1128 static int
1129 parse_int(const char *s, int default_value, int min, int max)
1130 {
1131 int value = atoi(s);
1132
1133 return (value < min || value > max) ? default_value : value;
1134 }
1135
1136 /* Wants: name = value */
1137 static int
1138 option_set_command(int argc, const char *argv[])
1139 {
1140 if (argc != 3) {
1141 config_msg = "Wrong number of arguments given to set command";
1142 return ERR;
1143 }
1144
1145 if (strcmp(argv[1], "=")) {
1146 config_msg = "No value assigned";
1147 return ERR;
1148 }
1149
1150 if (!strcmp(argv[0], "show-author")) {
1151 opt_author = parse_bool(argv[2]);
1152 return OK;
1153 }
1154
1155 if (!strcmp(argv[0], "show-date")) {
1156 opt_date = parse_bool(argv[2]);
1157 return OK;
1158 }
1159
1160 if (!strcmp(argv[0], "show-rev-graph")) {
1161 opt_rev_graph = parse_bool(argv[2]);
1162 return OK;
1163 }
1164
1165 if (!strcmp(argv[0], "show-refs")) {
1166 opt_show_refs = parse_bool(argv[2]);
1167 return OK;
1168 }
1169
1170 if (!strcmp(argv[0], "show-line-numbers")) {
1171 opt_line_number = parse_bool(argv[2]);
1172 return OK;
1173 }
1174
1175 if (!strcmp(argv[0], "line-graphics")) {
1176 opt_line_graphics = parse_bool(argv[2]);
1177 return OK;
1178 }
1179
1180 if (!strcmp(argv[0], "line-number-interval")) {
1181 opt_num_interval = parse_int(argv[2], opt_num_interval, 1, 1024);
1182 return OK;
1183 }
1184
1185 if (!strcmp(argv[0], "author-width")) {
1186 opt_author_cols = parse_int(argv[2], opt_author_cols, 0, 1024);
1187 return OK;
1188 }
1189
1190 if (!strcmp(argv[0], "tab-size")) {
1191 opt_tab_size = parse_int(argv[2], opt_tab_size, 1, 1024);
1192 return OK;
1193 }
1194
1195 if (!strcmp(argv[0], "commit-encoding")) {
1196 const char *arg = argv[2];
1197 int arglen = strlen(arg);
1198
1199 switch (arg[0]) {
1200 case '"':
1201 case '\'':
1202 if (arglen == 1 || arg[arglen - 1] != arg[0]) {
1203 config_msg = "Unmatched quotation";
1204 return ERR;
1205 }
1206 arg += 1; arglen -= 2;
1207 default:
1208 string_ncopy(opt_encoding, arg, strlen(arg));
1209 return OK;
1210 }
1211 }
1212
1213 config_msg = "Unknown variable name";
1214 return ERR;
1215 }
1216
1217 /* Wants: mode request key */
1218 static int
1219 option_bind_command(int argc, const char *argv[])
1220 {
1221 enum request request;
1222 int keymap;
1223 int key;
1224
1225 if (argc < 3) {
1226 config_msg = "Wrong number of arguments given to bind command";
1227 return ERR;
1228 }
1229
1230 if (set_keymap(&keymap, argv[0]) == ERR) {
1231 config_msg = "Unknown key map";
1232 return ERR;
1233 }
1234
1235 key = get_key_value(argv[1]);
1236 if (key == ERR) {
1237 config_msg = "Unknown key";
1238 return ERR;
1239 }
1240
1241 request = get_request(argv[2]);
1242 if (request == REQ_NONE) {
1243 const char *obsolete[] = { "cherry-pick" };
1244 size_t namelen = strlen(argv[2]);
1245 int i;
1246
1247 for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
1248 if (namelen == strlen(obsolete[i]) &&
1249 !string_enum_compare(obsolete[i], argv[2], namelen)) {
1250 config_msg = "Obsolete request name";
1251 return ERR;
1252 }
1253 }
1254 }
1255 if (request == REQ_NONE && *argv[2]++ == '!')
1256 request = add_run_request(keymap, key, argc - 2, argv + 2);
1257 if (request == REQ_NONE) {
1258 config_msg = "Unknown request name";
1259 return ERR;
1260 }
1261
1262 add_keybinding(keymap, request, key);
1263
1264 return OK;
1265 }
1266
1267 static int
1268 set_option(const char *opt, char *value)
1269 {
1270 const char *argv[SIZEOF_ARG];
1271 int valuelen;
1272 int argc = 0;
1273
1274 /* Tokenize */
1275 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1276 argv[argc++] = value;
1277 value += valuelen;
1278
1279 /* Nothing more to tokenize or last available token. */
1280 if (!*value || argc >= ARRAY_SIZE(argv))
1281 break;
1282
1283 *value++ = 0;
1284 while (isspace(*value))
1285 value++;
1286 }
1287
1288 if (!strcmp(opt, "color"))
1289 return option_color_command(argc, argv);
1290
1291 if (!strcmp(opt, "set"))
1292 return option_set_command(argc, argv);
1293
1294 if (!strcmp(opt, "bind"))
1295 return option_bind_command(argc, argv);
1296
1297 config_msg = "Unknown option command";
1298 return ERR;
1299 }
1300
1301 static int
1302 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1303 {
1304 int status = OK;
1305
1306 config_lineno++;
1307 config_msg = "Internal error";
1308
1309 /* Check for comment markers, since read_properties() will
1310 * only ensure opt and value are split at first " \t". */
1311 optlen = strcspn(opt, "#");
1312 if (optlen == 0)
1313 return OK;
1314
1315 if (opt[optlen] != 0) {
1316 config_msg = "No option value";
1317 status = ERR;
1318
1319 } else {
1320 /* Look for comment endings in the value. */
1321 size_t len = strcspn(value, "#");
1322
1323 if (len < valuelen) {
1324 valuelen = len;
1325 value[valuelen] = 0;
1326 }
1327
1328 status = set_option(opt, value);
1329 }
1330
1331 if (status == ERR) {
1332 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1333 config_lineno, (int) optlen, opt, config_msg);
1334 config_errors = TRUE;
1335 }
1336
1337 /* Always keep going if errors are encountered. */
1338 return OK;
1339 }
1340
1341 static void
1342 load_option_file(const char *path)
1343 {
1344 FILE *file;
1345
1346 /* It's ok that the file doesn't exist. */
1347 file = fopen(path, "r");
1348 if (!file)
1349 return;
1350
1351 config_lineno = 0;
1352 config_errors = FALSE;
1353
1354 if (read_properties(file, " \t", read_option) == ERR ||
1355 config_errors == TRUE)
1356 fprintf(stderr, "Errors while loading %s.\n", path);
1357 }
1358
1359 static int
1360 load_options(void)
1361 {
1362 const char *home = getenv("HOME");
1363 const char *tigrc_user = getenv("TIGRC_USER");
1364 const char *tigrc_system = getenv("TIGRC_SYSTEM");
1365 char buf[SIZEOF_STR];
1366
1367 add_builtin_run_requests();
1368
1369 if (!tigrc_system) {
1370 if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
1371 return ERR;
1372 tigrc_system = buf;
1373 }
1374 load_option_file(tigrc_system);
1375
1376 if (!tigrc_user) {
1377 if (!home || !string_format(buf, "%s/.tigrc", home))
1378 return ERR;
1379 tigrc_user = buf;
1380 }
1381 load_option_file(tigrc_user);
1382
1383 return OK;
1384 }
1385
1386
1387 /*
1388 * The viewer
1389 */
1390
1391 struct view;
1392 struct view_ops;
1393
1394 /* The display array of active views and the index of the current view. */
1395 static struct view *display[2];
1396 static unsigned int current_view;
1397
1398 /* Reading from the prompt? */
1399 static bool input_mode = FALSE;
1400
1401 #define foreach_displayed_view(view, i) \
1402 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1403
1404 #define displayed_views() (display[1] != NULL ? 2 : 1)
1405
1406 /* Current head and commit ID */
1407 static char ref_blob[SIZEOF_REF] = "";
1408 static char ref_commit[SIZEOF_REF] = "HEAD";
1409 static char ref_head[SIZEOF_REF] = "HEAD";
1410
1411 struct view {
1412 const char *name; /* View name */
1413 const char *cmd_fmt; /* Default command line format */
1414 const char *cmd_env; /* Command line set via environment */
1415 const char *id; /* Points to either of ref_{head,commit,blob} */
1416
1417 struct view_ops *ops; /* View operations */
1418
1419 enum keymap keymap; /* What keymap does this view have */
1420 bool git_dir; /* Whether the view requires a git directory. */
1421
1422 char cmd[SIZEOF_STR]; /* Command buffer */
1423 char ref[SIZEOF_REF]; /* Hovered commit reference */
1424 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1425
1426 int height, width; /* The width and height of the main window */
1427 WINDOW *win; /* The main window */
1428 WINDOW *title; /* The title window living below the main window */
1429
1430 /* Navigation */
1431 unsigned long offset; /* Offset of the window top */
1432 unsigned long lineno; /* Current line number */
1433
1434 /* Searching */
1435 char grep[SIZEOF_STR]; /* Search string */
1436 regex_t *regex; /* Pre-compiled regex */
1437
1438 /* If non-NULL, points to the view that opened this view. If this view
1439 * is closed tig will switch back to the parent view. */
1440 struct view *parent;
1441
1442 /* Buffering */
1443 size_t lines; /* Total number of lines */
1444 struct line *line; /* Line index */
1445 size_t line_alloc; /* Total number of allocated lines */
1446 size_t line_size; /* Total number of used lines */
1447 unsigned int digits; /* Number of digits in the lines member. */
1448
1449 /* Drawing */
1450 struct line *curline; /* Line currently being drawn. */
1451 enum line_type curtype; /* Attribute currently used for drawing. */
1452 unsigned long col; /* Column when drawing. */
1453
1454 /* Loading */
1455 FILE *pipe;
1456 time_t start_time;
1457 };
1458
1459 struct view_ops {
1460 /* What type of content being displayed. Used in the title bar. */
1461 const char *type;
1462 /* Open and reads in all view content. */
1463 bool (*open)(struct view *view);
1464 /* Read one line; updates view->line. */
1465 bool (*read)(struct view *view, char *data);
1466 /* Draw one line; @lineno must be < view->height. */
1467 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1468 /* Depending on view handle a special requests. */
1469 enum request (*request)(struct view *view, enum request request, struct line *line);
1470 /* Search for regex in a line. */
1471 bool (*grep)(struct view *view, struct line *line);
1472 /* Select line */
1473 void (*select)(struct view *view, struct line *line);
1474 };
1475
1476 static struct view_ops blame_ops;
1477 static struct view_ops blob_ops;
1478 static struct view_ops help_ops;
1479 static struct view_ops log_ops;
1480 static struct view_ops main_ops;
1481 static struct view_ops pager_ops;
1482 static struct view_ops stage_ops;
1483 static struct view_ops status_ops;
1484 static struct view_ops tree_ops;
1485
1486 #define VIEW_STR(name, cmd, env, ref, ops, map, git) \
1487 { name, cmd, #env, ref, ops, map, git }
1488
1489 #define VIEW_(id, name, ops, git, ref) \
1490 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1491
1492
1493 static struct view views[] = {
1494 VIEW_(MAIN, "main", &main_ops, TRUE, ref_head),
1495 VIEW_(DIFF, "diff", &pager_ops, TRUE, ref_commit),
1496 VIEW_(LOG, "log", &log_ops, TRUE, ref_head),
1497 VIEW_(TREE, "tree", &tree_ops, TRUE, ref_commit),
1498 VIEW_(BLOB, "blob", &blob_ops, TRUE, ref_blob),
1499 VIEW_(BLAME, "blame", &blame_ops, TRUE, ref_commit),
1500 VIEW_(HELP, "help", &help_ops, FALSE, ""),
1501 VIEW_(PAGER, "pager", &pager_ops, FALSE, "stdin"),
1502 VIEW_(STATUS, "status", &status_ops, TRUE, ""),
1503 VIEW_(STAGE, "stage", &stage_ops, TRUE, ""),
1504 };
1505
1506 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1507 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1508
1509 #define foreach_view(view, i) \
1510 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1511
1512 #define view_is_displayed(view) \
1513 (view == display[0] || view == display[1])
1514
1515
1516 enum line_graphic {
1517 LINE_GRAPHIC_VLINE
1518 };
1519
1520 static int line_graphics[] = {
1521 /* LINE_GRAPHIC_VLINE: */ '|'
1522 };
1523
1524 static inline void
1525 set_view_attr(struct view *view, enum line_type type)
1526 {
1527 if (!view->curline->selected && view->curtype != type) {
1528 wattrset(view->win, get_line_attr(type));
1529 wchgat(view->win, -1, 0, type, NULL);
1530 view->curtype = type;
1531 }
1532 }
1533
1534 static int
1535 draw_chars(struct view *view, enum line_type type, const char *string,
1536 int max_len, bool use_tilde)
1537 {
1538 int len = 0;
1539 int col = 0;
1540 int trimmed = FALSE;
1541
1542 if (max_len <= 0)
1543 return 0;
1544
1545 if (opt_utf8) {
1546 len = utf8_length(string, &col, max_len, &trimmed, use_tilde);
1547 } else {
1548 col = len = strlen(string);
1549 if (len > max_len) {
1550 if (use_tilde) {
1551 max_len -= 1;
1552 }
1553 col = len = max_len;
1554 trimmed = TRUE;
1555 }
1556 }
1557
1558 set_view_attr(view, type);
1559 waddnstr(view->win, string, len);
1560 if (trimmed && use_tilde) {
1561 set_view_attr(view, LINE_DELIMITER);
1562 waddch(view->win, '~');
1563 col++;
1564 }
1565
1566 return col;
1567 }
1568
1569 static int
1570 draw_space(struct view *view, enum line_type type, int max, int spaces)
1571 {
1572 static char space[] = " ";
1573 int col = 0;
1574
1575 spaces = MIN(max, spaces);
1576
1577 while (spaces > 0) {
1578 int len = MIN(spaces, sizeof(space) - 1);
1579
1580 col += draw_chars(view, type, space, spaces, FALSE);
1581 spaces -= len;
1582 }
1583
1584 return col;
1585 }
1586
1587 static bool
1588 draw_lineno(struct view *view, unsigned int lineno)
1589 {
1590 char number[10];
1591 int digits3 = view->digits < 3 ? 3 : view->digits;
1592 int max_number = MIN(digits3, STRING_SIZE(number));
1593 int max = view->width - view->col;
1594 int col;
1595
1596 if (max < max_number)
1597 max_number = max;
1598
1599 lineno += view->offset + 1;
1600 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1601 static char fmt[] = "%1ld";
1602
1603 if (view->digits <= 9)
1604 fmt[1] = '0' + digits3;
1605
1606 if (!string_format(number, fmt, lineno))
1607 number[0] = 0;
1608 col = draw_chars(view, LINE_LINE_NUMBER, number, max_number, TRUE);
1609 } else {
1610 col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
1611 }
1612
1613 if (col < max) {
1614 set_view_attr(view, LINE_DEFAULT);
1615 waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
1616 col++;
1617 }
1618
1619 if (col < max)
1620 col += draw_space(view, LINE_DEFAULT, max - col, 1);
1621 view->col += col;
1622
1623 return view->width - view->col <= 0;
1624 }
1625
1626 static bool
1627 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1628 {
1629 view->col += draw_chars(view, type, string, view->width - view->col, trim);
1630 return view->width - view->col <= 0;
1631 }
1632
1633 static bool
1634 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1635 {
1636 int max = view->width - view->col;
1637 int i;
1638
1639 if (max < size)
1640 size = max;
1641
1642 set_view_attr(view, type);
1643 /* Using waddch() instead of waddnstr() ensures that
1644 * they'll be rendered correctly for the cursor line. */
1645 for (i = 0; i < size; i++)
1646 waddch(view->win, graphic[i]);
1647
1648 view->col += size;
1649 if (size < max) {
1650 waddch(view->win, ' ');
1651 view->col++;
1652 }
1653
1654 return view->width - view->col <= 0;
1655 }
1656
1657 static bool
1658 draw_field(struct view *view, enum line_type type, const char *text, int len, bool trim)
1659 {
1660 int max = MIN(view->width - view->col, len);
1661 int col;
1662
1663 if (text)
1664 col = draw_chars(view, type, text, max - 1, trim);
1665 else
1666 col = draw_space(view, type, max - 1, max - 1);
1667
1668 view->col += col + draw_space(view, LINE_DEFAULT, max - col, max - col);
1669 return view->width - view->col <= 0;
1670 }
1671
1672 static bool
1673 draw_date(struct view *view, struct tm *time)
1674 {
1675 char buf[DATE_COLS];
1676 char *date;
1677 int timelen = 0;
1678
1679 if (time)
1680 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
1681 date = timelen ? buf : NULL;
1682
1683 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
1684 }
1685
1686 static bool
1687 draw_view_line(struct view *view, unsigned int lineno)
1688 {
1689 struct line *line;
1690 bool selected = (view->offset + lineno == view->lineno);
1691 bool draw_ok;
1692
1693 assert(view_is_displayed(view));
1694
1695 if (view->offset + lineno >= view->lines)
1696 return FALSE;
1697
1698 line = &view->line[view->offset + lineno];
1699
1700 wmove(view->win, lineno, 0);
1701 view->col = 0;
1702 view->curline = line;
1703 view->curtype = LINE_NONE;
1704 line->selected = FALSE;
1705
1706 if (selected) {
1707 set_view_attr(view, LINE_CURSOR);
1708 line->selected = TRUE;
1709 view->ops->select(view, line);
1710 } else if (line->selected) {
1711 wclrtoeol(view->win);
1712 }
1713
1714 scrollok(view->win, FALSE);
1715 draw_ok = view->ops->draw(view, line, lineno);
1716 scrollok(view->win, TRUE);
1717
1718 return draw_ok;
1719 }
1720
1721 static void
1722 redraw_view_dirty(struct view *view)
1723 {
1724 bool dirty = FALSE;
1725 int lineno;
1726
1727 for (lineno = 0; lineno < view->height; lineno++) {
1728 struct line *line = &view->line[view->offset + lineno];
1729
1730 if (!line->dirty)
1731 continue;
1732 line->dirty = 0;
1733 dirty = TRUE;
1734 if (!draw_view_line(view, lineno))
1735 break;
1736 }
1737
1738 if (!dirty)
1739 return;
1740 redrawwin(view->win);
1741 if (input_mode)
1742 wnoutrefresh(view->win);
1743 else
1744 wrefresh(view->win);
1745 }
1746
1747 static void
1748 redraw_view_from(struct view *view, int lineno)
1749 {
1750 assert(0 <= lineno && lineno < view->height);
1751
1752 for (; lineno < view->height; lineno++) {
1753 if (!draw_view_line(view, lineno))
1754 break;
1755 }
1756
1757 redrawwin(view->win);
1758 if (input_mode)
1759 wnoutrefresh(view->win);
1760 else
1761 wrefresh(view->win);
1762 }
1763
1764 static void
1765 redraw_view(struct view *view)
1766 {
1767 wclear(view->win);
1768 redraw_view_from(view, 0);
1769 }
1770
1771
1772 static void
1773 update_view_title(struct view *view)
1774 {
1775 char buf[SIZEOF_STR];
1776 char state[SIZEOF_STR];
1777 size_t bufpos = 0, statelen = 0;
1778
1779 assert(view_is_displayed(view));
1780
1781 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1782 unsigned int view_lines = view->offset + view->height;
1783 unsigned int lines = view->lines
1784 ? MIN(view_lines, view->lines) * 100 / view->lines
1785 : 0;
1786
1787 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1788 view->ops->type,
1789 view->lineno + 1,
1790 view->lines,
1791 lines);
1792
1793 if (view->pipe) {
1794 time_t secs = time(NULL) - view->start_time;
1795
1796 /* Three git seconds are a long time ... */
1797 if (secs > 2)
1798 string_format_from(state, &statelen, " %lds", secs);
1799 }
1800 }
1801
1802 string_format_from(buf, &bufpos, "[%s]", view->name);
1803 if (*view->ref && bufpos < view->width) {
1804 size_t refsize = strlen(view->ref);
1805 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1806
1807 if (minsize < view->width)
1808 refsize = view->width - minsize + 7;
1809 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1810 }
1811
1812 if (statelen && bufpos < view->width) {
1813 string_format_from(buf, &bufpos, " %s", state);
1814 }
1815
1816 if (view == display[current_view])
1817 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1818 else
1819 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1820
1821 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1822 wclrtoeol(view->title);
1823 wmove(view->title, 0, view->width - 1);
1824
1825 if (input_mode)
1826 wnoutrefresh(view->title);
1827 else
1828 wrefresh(view->title);
1829 }
1830
1831 static void
1832 resize_display(void)
1833 {
1834 int offset, i;
1835 struct view *base = display[0];
1836 struct view *view = display[1] ? display[1] : display[0];
1837
1838 /* Setup window dimensions */
1839
1840 getmaxyx(stdscr, base->height, base->width);
1841
1842 /* Make room for the status window. */
1843 base->height -= 1;
1844
1845 if (view != base) {
1846 /* Horizontal split. */
1847 view->width = base->width;
1848 view->height = SCALE_SPLIT_VIEW(base->height);
1849 base->height -= view->height;
1850
1851 /* Make room for the title bar. */
1852 view->height -= 1;
1853 }
1854
1855 /* Make room for the title bar. */
1856 base->height -= 1;
1857
1858 offset = 0;
1859
1860 foreach_displayed_view (view, i) {
1861 if (!view->win) {
1862 view->win = newwin(view->height, 0, offset, 0);
1863 if (!view->win)
1864 die("Failed to create %s view", view->name);
1865
1866 scrollok(view->win, TRUE);
1867
1868 view->title = newwin(1, 0, offset + view->height, 0);
1869 if (!view->title)
1870 die("Failed to create title window");
1871
1872 } else {
1873 wresize(view->win, view->height, view->width);
1874 mvwin(view->win, offset, 0);
1875 mvwin(view->title, offset + view->height, 0);
1876 }
1877
1878 offset += view->height + 1;
1879 }
1880 }
1881
1882 static void
1883 redraw_display(void)
1884 {
1885 struct view *view;
1886 int i;
1887
1888 foreach_displayed_view (view, i) {
1889 redraw_view(view);
1890 update_view_title(view);
1891 }
1892 }
1893
1894 static void
1895 update_display_cursor(struct view *view)
1896 {
1897 /* Move the cursor to the right-most column of the cursor line.
1898 *
1899 * XXX: This could turn out to be a bit expensive, but it ensures that
1900 * the cursor does not jump around. */
1901 if (view->lines) {
1902 wmove(view->win, view->lineno - view->offset, view->width - 1);
1903 wrefresh(view->win);
1904 }
1905 }
1906
1907 /*
1908 * Navigation
1909 */
1910
1911 /* Scrolling backend */
1912 static void
1913 do_scroll_view(struct view *view, int lines)
1914 {
1915 bool redraw_current_line = FALSE;
1916
1917 /* The rendering expects the new offset. */
1918 view->offset += lines;
1919
1920 assert(0 <= view->offset && view->offset < view->lines);
1921 assert(lines);
1922
1923 /* Move current line into the view. */
1924 if (view->lineno < view->offset) {
1925 view->lineno = view->offset;
1926 redraw_current_line = TRUE;
1927 } else if (view->lineno >= view->offset + view->height) {
1928 view->lineno = view->offset + view->height - 1;
1929 redraw_current_line = TRUE;
1930 }
1931
1932 assert(view->offset <= view->lineno && view->lineno < view->lines);
1933
1934 /* Redraw the whole screen if scrolling is pointless. */
1935 if (view->height < ABS(lines)) {
1936 redraw_view(view);
1937
1938 } else {
1939 int line = lines > 0 ? view->height - lines : 0;
1940 int end = line + ABS(lines);
1941
1942 wscrl(view->win, lines);
1943
1944 for (; line < end; line++) {
1945 if (!draw_view_line(view, line))
1946 break;
1947 }
1948
1949 if (redraw_current_line)
1950 draw_view_line(view, view->lineno - view->offset);
1951 }
1952
1953 redrawwin(view->win);
1954 wrefresh(view->win);
1955 report("");
1956 }
1957
1958 /* Scroll frontend */
1959 static void
1960 scroll_view(struct view *view, enum request request)
1961 {
1962 int lines = 1;
1963
1964 assert(view_is_displayed(view));
1965
1966 switch (request) {
1967 case REQ_SCROLL_PAGE_DOWN:
1968 lines = view->height;
1969 case REQ_SCROLL_LINE_DOWN:
1970 if (view->offset + lines > view->lines)
1971 lines = view->lines - view->offset;
1972
1973 if (lines == 0 || view->offset + view->height >= view->lines) {
1974 report("Cannot scroll beyond the last line");
1975 return;
1976 }
1977 break;
1978
1979 case REQ_SCROLL_PAGE_UP:
1980 lines = view->height;
1981 case REQ_SCROLL_LINE_UP:
1982 if (lines > view->offset)
1983 lines = view->offset;
1984
1985 if (lines == 0) {
1986 report("Cannot scroll beyond the first line");
1987 return;
1988 }
1989
1990 lines = -lines;
1991 break;
1992
1993 default:
1994 die("request %d not handled in switch", request);
1995 }
1996
1997 do_scroll_view(view, lines);
1998 }
1999
2000 /* Cursor moving */
2001 static void
2002 move_view(struct view *view, enum request request)
2003 {
2004 int scroll_steps = 0;
2005 int steps;
2006
2007 switch (request) {
2008 case REQ_MOVE_FIRST_LINE:
2009 steps = -view->lineno;
2010 break;
2011
2012 case REQ_MOVE_LAST_LINE:
2013 steps = view->lines - view->lineno - 1;
2014 break;
2015
2016 case REQ_MOVE_PAGE_UP:
2017 steps = view->height > view->lineno
2018 ? -view->lineno : -view->height;
2019 break;
2020
2021 case REQ_MOVE_PAGE_DOWN:
2022 steps = view->lineno + view->height >= view->lines
2023 ? view->lines - view->lineno - 1 : view->height;
2024 break;
2025
2026 case REQ_MOVE_UP:
2027 steps = -1;
2028 break;
2029
2030 case REQ_MOVE_DOWN:
2031 steps = 1;
2032 break;
2033
2034 default:
2035 die("request %d not handled in switch", request);
2036 }
2037
2038 if (steps <= 0 && view->lineno == 0) {
2039 report("Cannot move beyond the first line");
2040 return;
2041
2042 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2043 report("Cannot move beyond the last line");
2044 return;
2045 }
2046
2047 /* Move the current line */
2048 view->lineno += steps;
2049 assert(0 <= view->lineno && view->lineno < view->lines);
2050
2051 /* Check whether the view needs to be scrolled */
2052 if (view->lineno < view->offset ||
2053 view->lineno >= view->offset + view->height) {
2054 scroll_steps = steps;
2055 if (steps < 0 && -steps > view->offset) {
2056 scroll_steps = -view->offset;
2057
2058 } else if (steps > 0) {
2059 if (view->lineno == view->lines - 1 &&
2060 view->lines > view->height) {
2061 scroll_steps = view->lines - view->offset - 1;
2062 if (scroll_steps >= view->height)
2063 scroll_steps -= view->height - 1;
2064 }
2065 }
2066 }
2067
2068 if (!view_is_displayed(view)) {
2069 view->offset += scroll_steps;
2070 assert(0 <= view->offset && view->offset < view->lines);
2071 view->ops->select(view, &view->line[view->lineno]);
2072 return;
2073 }
2074
2075 /* Repaint the old "current" line if we be scrolling */
2076 if (ABS(steps) < view->height)
2077 draw_view_line(view, view->lineno - steps - view->offset);
2078
2079 if (scroll_steps) {
2080 do_scroll_view(view, scroll_steps);
2081 return;
2082 }
2083
2084 /* Draw the current line */
2085 draw_view_line(view, view->lineno - view->offset);
2086
2087 redrawwin(view->win);
2088 wrefresh(view->win);
2089 report("");
2090 }
2091
2092
2093 /*
2094 * Searching
2095 */
2096
2097 static void search_view(struct view *view, enum request request);
2098
2099 static bool
2100 find_next_line(struct view *view, unsigned long lineno, struct line *line)
2101 {
2102 assert(view_is_displayed(view));
2103
2104 if (!view->ops->grep(view, line))
2105 return FALSE;
2106
2107 if (lineno - view->offset >= view->height) {
2108 view->offset = lineno;
2109 view->lineno = lineno;
2110 redraw_view(view);
2111
2112 } else {
2113 unsigned long old_lineno = view->lineno - view->offset;
2114
2115 view->lineno = lineno;
2116 draw_view_line(view, old_lineno);
2117
2118 draw_view_line(view, view->lineno - view->offset);
2119 redrawwin(view->win);
2120 wrefresh(view->win);
2121 }
2122
2123 report("Line %ld matches '%s'", lineno + 1, view->grep);
2124 return TRUE;
2125 }
2126
2127 static void
2128 find_next(struct view *view, enum request request)
2129 {
2130 unsigned long lineno = view->lineno;
2131 int direction;
2132
2133 if (!*view->grep) {
2134 if (!*opt_search)
2135 report("No previous search");
2136 else
2137 search_view(view, request);
2138 return;
2139 }
2140
2141 switch (request) {
2142 case REQ_SEARCH:
2143 case REQ_FIND_NEXT:
2144 direction = 1;
2145 break;
2146
2147 case REQ_SEARCH_BACK:
2148 case REQ_FIND_PREV:
2149 direction = -1;
2150 break;
2151
2152 default:
2153 return;
2154 }
2155
2156 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2157 lineno += direction;
2158
2159 /* Note, lineno is unsigned long so will wrap around in which case it
2160 * will become bigger than view->lines. */
2161 for (; lineno < view->lines; lineno += direction) {
2162 struct line *line = &view->line[lineno];
2163
2164 if (find_next_line(view, lineno, line))
2165 return;
2166 }
2167
2168 report("No match found for '%s'", view->grep);
2169 }
2170
2171 static void
2172 search_view(struct view *view, enum request request)
2173 {
2174 int regex_err;
2175
2176 if (view->regex) {
2177 regfree(view->regex);
2178 *view->grep = 0;
2179 } else {
2180 view->regex = calloc(1, sizeof(*view->regex));
2181 if (!view->regex)
2182 return;
2183 }
2184
2185 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2186 if (regex_err != 0) {
2187 char buf[SIZEOF_STR] = "unknown error";
2188
2189 regerror(regex_err, view->regex, buf, sizeof(buf));
2190 report("Search failed: %s", buf);
2191 return;
2192 }
2193
2194 string_copy(view->grep, opt_search);
2195
2196 find_next(view, request);
2197 }
2198
2199 /*
2200 * Incremental updating
2201 */
2202
2203 static void
2204 reset_view(struct view *view)
2205 {
2206 int i;
2207
2208 for (i = 0; i < view->lines; i++)
2209 free(view->line[i].data);
2210 free(view->line);
2211
2212 view->line = NULL;
2213 view->offset = 0;
2214 view->lines = 0;
2215 view->lineno = 0;
2216 view->line_size = 0;
2217 view->line_alloc = 0;
2218 view->vid[0] = 0;
2219 }
2220
2221 static void
2222 end_update(struct view *view, bool force)
2223 {
2224 if (!view->pipe)
2225 return;
2226 while (!view->ops->read(view, NULL))
2227 if (!force)
2228 return;
2229 set_nonblocking_input(FALSE);
2230 if (view->pipe == stdin)
2231 fclose(view->pipe);
2232 else
2233 pclose(view->pipe);
2234 view->pipe = NULL;
2235 }
2236
2237 static void
2238 setup_update(struct view *view, const char *vid)
2239 {
2240 set_nonblocking_input(TRUE);
2241 reset_view(view);
2242 string_copy_rev(view->vid, vid);
2243 view->start_time = time(NULL);
2244 }
2245
2246 static bool
2247 begin_update(struct view *view, bool refresh)
2248 {
2249 if (opt_cmd[0]) {
2250 string_copy(view->cmd, opt_cmd);
2251 opt_cmd[0] = 0;
2252 /* When running random commands, initially show the
2253 * command in the title. However, it maybe later be
2254 * overwritten if a commit line is selected. */
2255 if (view == VIEW(REQ_VIEW_PAGER))
2256 string_copy(view->ref, view->cmd);
2257 else
2258 view->ref[0] = 0;
2259
2260 } else if (view == VIEW(REQ_VIEW_TREE)) {
2261 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2262 char path[SIZEOF_STR];
2263
2264 if (strcmp(view->vid, view->id))
2265 opt_path[0] = path[0] = 0;
2266 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
2267 return FALSE;
2268
2269 if (!string_format(view->cmd, format, view->id, path))
2270 return FALSE;
2271
2272 } else if (!refresh) {
2273 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2274 const char *id = view->id;
2275
2276 if (!string_format(view->cmd, format, id, id, id, id, id))
2277 return FALSE;
2278
2279 /* Put the current ref_* value to the view title ref
2280 * member. This is needed by the blob view. Most other
2281 * views sets it automatically after loading because the
2282 * first line is a commit line. */
2283 string_copy_rev(view->ref, view->id);
2284 }
2285
2286 /* Special case for the pager view. */
2287 if (opt_pipe) {
2288 view->pipe = opt_pipe;
2289 opt_pipe = NULL;
2290 } else {
2291 view->pipe = popen(view->cmd, "r");
2292 }
2293
2294 if (!view->pipe)
2295 return FALSE;
2296
2297 setup_update(view, view->id);
2298
2299 return TRUE;
2300 }
2301
2302 #define ITEM_CHUNK_SIZE 256
2303 static void *
2304 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2305 {
2306 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2307 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2308
2309 if (mem == NULL || num_chunks != num_chunks_new) {
2310 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2311 mem = realloc(mem, *size * item_size);
2312 }
2313
2314 return mem;
2315 }
2316
2317 static struct line *
2318 realloc_lines(struct view *view, size_t line_size)
2319 {
2320 size_t alloc = view->line_alloc;
2321 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2322 sizeof(*view->line));
2323
2324 if (!tmp)
2325 return NULL;
2326
2327 view->line = tmp;
2328 view->line_alloc = alloc;
2329 view->line_size = line_size;
2330 return view->line;
2331 }
2332
2333 static bool
2334 update_view(struct view *view)
2335 {
2336 char in_buffer[BUFSIZ];
2337 char out_buffer[BUFSIZ * 2];
2338 char *line;
2339 /* The number of lines to read. If too low it will cause too much
2340 * redrawing (and possible flickering), if too high responsiveness
2341 * will suffer. */
2342 unsigned long lines = view->height;
2343 int redraw_from = -1;
2344
2345 if (!view->pipe)
2346 return TRUE;
2347
2348 /* Only redraw if lines are visible. */
2349 if (view->offset + view->height >= view->lines)
2350 redraw_from = view->lines - view->offset;
2351
2352 /* FIXME: This is probably not perfect for backgrounded views. */
2353 if (!realloc_lines(view, view->lines + lines))
2354 goto alloc_error;
2355
2356 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
2357 size_t linelen = strlen(line);
2358
2359 if (linelen)
2360 line[linelen - 1] = 0;
2361
2362 if (opt_iconv != ICONV_NONE) {
2363 ICONV_CONST char *inbuf = line;
2364 size_t inlen = linelen;
2365
2366 char *outbuf = out_buffer;
2367 size_t outlen = sizeof(out_buffer);
2368
2369 size_t ret;
2370
2371 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2372 if (ret != (size_t) -1) {
2373 line = out_buffer;
2374 linelen = strlen(out_buffer);
2375 }
2376 }
2377
2378 if (!view->ops->read(view, line))
2379 goto alloc_error;
2380
2381 if (lines-- == 1)
2382 break;
2383 }
2384
2385 {
2386 int digits;
2387
2388 lines = view->lines;
2389 for (digits = 0; lines; digits++)
2390 lines /= 10;
2391
2392 /* Keep the displayed view in sync with line number scaling. */
2393 if (digits != view->digits) {
2394 view->digits = digits;
2395 redraw_from = 0;
2396 }
2397 }
2398
2399 if (ferror(view->pipe) && errno != 0) {
2400 report("Failed to read: %s", strerror(errno));
2401 end_update(view, TRUE);
2402
2403 } else if (feof(view->pipe)) {
2404 report("");
2405 end_update(view, FALSE);
2406 }
2407
2408 if (!view_is_displayed(view))
2409 return TRUE;
2410
2411 if (view == VIEW(REQ_VIEW_TREE)) {
2412 /* Clear the view and redraw everything since the tree sorting
2413 * might have rearranged things. */
2414 redraw_view(view);
2415
2416 } else if (redraw_from >= 0) {
2417 /* If this is an incremental update, redraw the previous line
2418 * since for commits some members could have changed when
2419 * loading the main view. */
2420 if (redraw_from > 0)
2421 redraw_from--;
2422
2423 /* Since revision graph visualization requires knowledge
2424 * about the parent commit, it causes a further one-off
2425 * needed to be redrawn for incremental updates. */
2426 if (redraw_from > 0 && opt_rev_graph)
2427 redraw_from--;
2428
2429 /* Incrementally draw avoids flickering. */
2430 redraw_view_from(view, redraw_from);
2431 }
2432
2433 if (view == VIEW(REQ_VIEW_BLAME))
2434 redraw_view_dirty(view);
2435
2436 /* Update the title _after_ the redraw so that if the redraw picks up a
2437 * commit reference in view->ref it'll be available here. */
2438 update_view_title(view);
2439 return TRUE;
2440
2441 alloc_error:
2442 report("Allocation failure");
2443 end_update(view, TRUE);
2444 return FALSE;
2445 }
2446
2447 static struct line *
2448 add_line_data(struct view *view, void *data, enum line_type type)
2449 {
2450 struct line *line = &view->line[view->lines++];
2451
2452 memset(line, 0, sizeof(*line));
2453 line->type = type;
2454 line->data = data;
2455
2456 return line;
2457 }
2458
2459 static struct line *
2460 add_line_text(struct view *view, const char *text, enum line_type type)
2461 {
2462 char *data = text ? strdup(text) : NULL;
2463
2464 return data ? add_line_data(view, data, type) : NULL;
2465 }
2466
2467
2468 /*
2469 * View opening
2470 */
2471
2472 enum open_flags {
2473 OPEN_DEFAULT = 0, /* Use default view switching. */
2474 OPEN_SPLIT = 1, /* Split current view. */
2475 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2476 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2477 OPEN_NOMAXIMIZE = 8, /* Do not maximize the current view. */
2478 OPEN_REFRESH = 16, /* Refresh view using previous command. */
2479 };
2480
2481 static void
2482 open_view(struct view *prev, enum request request, enum open_flags flags)
2483 {
2484 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2485 bool split = !!(flags & OPEN_SPLIT);
2486 bool reload = !!(flags & (OPEN_RELOAD | OPEN_REFRESH));
2487 bool nomaximize = !!(flags & (OPEN_NOMAXIMIZE | OPEN_REFRESH));
2488 struct view *view = VIEW(request);
2489 int nviews = displayed_views();
2490 struct view *base_view = display[0];
2491
2492 if (view == prev && nviews == 1 && !reload) {
2493 report("Already in %s view", view->name);
2494 return;
2495 }
2496
2497 if (view->git_dir && !opt_git_dir[0]) {
2498 report("The %s view is disabled in pager view", view->name);
2499 return;
2500 }
2501
2502 if (split) {
2503 display[1] = view;
2504 if (!backgrounded)
2505 current_view = 1;
2506 } else if (!nomaximize) {
2507 /* Maximize the current view. */
2508 memset(display, 0, sizeof(display));
2509 current_view = 0;
2510 display[current_view] = view;
2511 }
2512
2513 /* Resize the view when switching between split- and full-screen,
2514 * or when switching between two different full-screen views. */
2515 if (nviews != displayed_views() ||
2516 (nviews == 1 && base_view != display[0]))
2517 resize_display();
2518
2519 if (view->pipe)
2520 end_update(view, TRUE);
2521
2522 if (view->ops->open) {
2523 if (!view->ops->open(view)) {
2524 report("Failed to load %s view", view->name);
2525 return;
2526 }
2527
2528 } else if ((reload || strcmp(view->vid, view->id)) &&
2529 !begin_update(view, flags & OPEN_REFRESH)) {
2530 report("Failed to load %s view", view->name);
2531 return;
2532 }
2533
2534 if (split && prev->lineno - prev->offset >= prev->height) {
2535 /* Take the title line into account. */
2536 int lines = prev->lineno - prev->offset - prev->height + 1;
2537
2538 /* Scroll the view that was split if the current line is
2539 * outside the new limited view. */
2540 do_scroll_view(prev, lines);
2541 }
2542
2543 if (prev && view != prev) {
2544 if (split && !backgrounded) {
2545 /* "Blur" the previous view. */
2546 update_view_title(prev);
2547 }
2548
2549 view->parent = prev;
2550 }
2551
2552 if (view->pipe && view->lines == 0) {
2553 /* Clear the old view and let the incremental updating refill
2554 * the screen. */
2555 werase(view->win);
2556 report("");
2557 } else if (view_is_displayed(view)) {
2558 redraw_view(view);
2559 report("");
2560 }
2561
2562 /* If the view is backgrounded the above calls to report()
2563 * won't redraw the view title. */
2564 if (backgrounded)
2565 update_view_title(view);
2566 }
2567
2568 static bool
2569 run_confirm(const char *cmd, const char *prompt)
2570 {
2571 bool confirmation = prompt_yesno(prompt);
2572
2573 if (confirmation)
2574 system(cmd);
2575
2576 return confirmation;
2577 }
2578
2579 static void
2580 open_external_viewer(const char *cmd)
2581 {
2582 def_prog_mode(); /* save current tty modes */
2583 endwin(); /* restore original tty modes */
2584 system(cmd);
2585 fprintf(stderr, "Press Enter to continue");
2586 getc(opt_tty);
2587 reset_prog_mode();
2588 redraw_display();
2589 }
2590
2591 static void
2592 open_mergetool(const char *file)
2593 {
2594 char cmd[SIZEOF_STR];
2595 char file_sq[SIZEOF_STR];
2596
2597 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2598 string_format(cmd, "git mergetool %s", file_sq)) {
2599 open_external_viewer(cmd);
2600 }
2601 }
2602
2603 static void
2604 open_editor(bool from_root, const char *file)
2605 {
2606 char cmd[SIZEOF_STR];
2607 char file_sq[SIZEOF_STR];
2608 const char *editor;
2609 char *prefix = from_root ? opt_cdup : "";
2610
2611 editor = getenv("GIT_EDITOR");
2612 if (!editor && *opt_editor)
2613 editor = opt_editor;
2614 if (!editor)
2615 editor = getenv("VISUAL");
2616 if (!editor)
2617 editor = getenv("EDITOR");
2618 if (!editor)
2619 editor = "vi";
2620
2621 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2622 string_format(cmd, "%s %s%s", editor, prefix, file_sq)) {
2623 open_external_viewer(cmd);
2624 }
2625 }
2626
2627 static void
2628 open_run_request(enum request request)
2629 {
2630 struct run_request *req = get_run_request(request);
2631 char buf[SIZEOF_STR * 2];
2632 size_t bufpos;
2633 char *cmd;
2634
2635 if (!req) {
2636 report("Unknown run request");
2637 return;
2638 }
2639
2640 bufpos = 0;
2641 cmd = req->cmd;
2642
2643 while (cmd) {
2644 char *next = strstr(cmd, "%(");
2645 int len = next - cmd;
2646 char *value;
2647
2648 if (!next) {
2649 len = strlen(cmd);
2650 value = "";
2651
2652 } else if (!strncmp(next, "%(head)", 7)) {
2653 value = ref_head;
2654
2655 } else if (!strncmp(next, "%(commit)", 9)) {
2656 value = ref_commit;
2657
2658 } else if (!strncmp(next, "%(blob)", 7)) {
2659 value = ref_blob;
2660
2661 } else {
2662 report("Unknown replacement in run request: `%s`", req->cmd);
2663 return;
2664 }
2665
2666 if (!string_format_from(buf, &bufpos, "%.*s%s", len, cmd, value))
2667 return;
2668
2669 if (next)
2670 next = strchr(next, ')') + 1;
2671 cmd = next;
2672 }
2673
2674 open_external_viewer(buf);
2675 }
2676
2677 /*
2678 * User request switch noodle
2679 */
2680
2681 static int
2682 view_driver(struct view *view, enum request request)
2683 {
2684 int i;
2685
2686 if (request == REQ_NONE) {
2687 doupdate();
2688 return TRUE;
2689 }
2690
2691 if (request > REQ_NONE) {
2692 open_run_request(request);
2693 /* FIXME: When all views can refresh always do this. */
2694 if (view == VIEW(REQ_VIEW_STATUS) ||
2695 view == VIEW(REQ_VIEW_MAIN) ||
2696 view == VIEW(REQ_VIEW_LOG) ||
2697 view == VIEW(REQ_VIEW_STAGE))
2698 request = REQ_REFRESH;
2699 else
2700 return TRUE;
2701 }
2702
2703 if (view && view->lines) {
2704 request = view->ops->request(view, request, &view->line[view->lineno]);
2705 if (request == REQ_NONE)
2706 return TRUE;
2707 }
2708
2709 switch (request) {
2710 case REQ_MOVE_UP:
2711 case REQ_MOVE_DOWN:
2712 case REQ_MOVE_PAGE_UP:
2713 case REQ_MOVE_PAGE_DOWN:
2714 case REQ_MOVE_FIRST_LINE:
2715 case REQ_MOVE_LAST_LINE:
2716 move_view(view, request);
2717 break;
2718
2719 case REQ_SCROLL_LINE_DOWN:
2720 case REQ_SCROLL_LINE_UP:
2721 case REQ_SCROLL_PAGE_DOWN:
2722 case REQ_SCROLL_PAGE_UP:
2723 scroll_view(view, request);
2724 break;
2725
2726 case REQ_VIEW_BLAME:
2727 if (!opt_file[0]) {
2728 report("No file chosen, press %s to open tree view",
2729 get_key(REQ_VIEW_TREE));
2730 break;
2731 }
2732 open_view(view, request, OPEN_DEFAULT);
2733 break;
2734
2735 case REQ_VIEW_BLOB:
2736 if (!ref_blob[0]) {
2737 report("No file chosen, press %s to open tree view",
2738 get_key(REQ_VIEW_TREE));
2739 break;
2740 }
2741 open_view(view, request, OPEN_DEFAULT);
2742 break;
2743
2744 case REQ_VIEW_PAGER:
2745 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2746 report("No pager content, press %s to run command from prompt",
2747 get_key(REQ_PROMPT));
2748 break;
2749 }
2750 open_view(view, request, OPEN_DEFAULT);
2751 break;
2752
2753 case REQ_VIEW_STAGE:
2754 if (!VIEW(REQ_VIEW_STAGE)->lines) {
2755 report("No stage content, press %s to open the status view and choose file",
2756 get_key(REQ_VIEW_STATUS));
2757 break;
2758 }
2759 open_view(view, request, OPEN_DEFAULT);
2760 break;
2761
2762 case REQ_VIEW_STATUS:
2763 if (opt_is_inside_work_tree == FALSE) {
2764 report("The status view requires a working tree");
2765 break;
2766 }
2767 open_view(view, request, OPEN_DEFAULT);
2768 break;
2769
2770 case REQ_VIEW_MAIN:
2771 case REQ_VIEW_DIFF:
2772 case REQ_VIEW_LOG:
2773 case REQ_VIEW_TREE:
2774 case REQ_VIEW_HELP:
2775 open_view(view, request, OPEN_DEFAULT);
2776 break;
2777
2778 case REQ_NEXT:
2779 case REQ_PREVIOUS:
2780 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2781
2782 if ((view == VIEW(REQ_VIEW_DIFF) &&
2783 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2784 (view == VIEW(REQ_VIEW_DIFF) &&
2785 view->parent == VIEW(REQ_VIEW_BLAME)) ||
2786 (view == VIEW(REQ_VIEW_STAGE) &&
2787 view->parent == VIEW(REQ_VIEW_STATUS)) ||
2788 (view == VIEW(REQ_VIEW_BLOB) &&
2789 view->parent == VIEW(REQ_VIEW_TREE))) {
2790 int line;
2791
2792 view = view->parent;
2793 line = view->lineno;
2794 move_view(view, request);
2795 if (view_is_displayed(view))
2796 update_view_title(view);
2797 if (line != view->lineno)
2798 view->ops->request(view, REQ_ENTER,
2799 &view->line[view->lineno]);
2800
2801 } else {
2802 move_view(view, request);
2803 }
2804 break;
2805
2806 case REQ_VIEW_NEXT:
2807 {
2808 int nviews = displayed_views();
2809 int next_view = (current_view + 1) % nviews;
2810
2811 if (next_view == current_view) {
2812 report("Only one view is displayed");
2813 break;
2814 }
2815
2816 current_view = next_view;
2817 /* Blur out the title of the previous view. */
2818 update_view_title(view);
2819 report("");
2820 break;
2821 }
2822 case REQ_REFRESH:
2823 report("Refreshing is not yet supported for the %s view", view->name);
2824 break;
2825
2826 case REQ_MAXIMIZE:
2827 if (displayed_views() == 2)
2828 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
2829 break;
2830
2831 case REQ_TOGGLE_LINENO:
2832 opt_line_number = !opt_line_number;
2833 redraw_display();
2834 break;
2835
2836 case REQ_TOGGLE_DATE:
2837 opt_date = !opt_date;
2838 redraw_display();
2839 break;
2840
2841 case REQ_TOGGLE_AUTHOR:
2842 opt_author = !opt_author;
2843 redraw_display();
2844 break;
2845
2846 case REQ_TOGGLE_REV_GRAPH:
2847 opt_rev_graph = !opt_rev_graph;
2848 redraw_display();
2849 break;
2850
2851 case REQ_TOGGLE_REFS:
2852 opt_show_refs = !opt_show_refs;
2853 redraw_display();
2854 break;
2855
2856 case REQ_SEARCH:
2857 case REQ_SEARCH_BACK:
2858 search_view(view, request);
2859 break;
2860
2861 case REQ_FIND_NEXT:
2862 case REQ_FIND_PREV:
2863 find_next(view, request);
2864 break;
2865
2866 case REQ_STOP_LOADING:
2867 for (i = 0; i < ARRAY_SIZE(views); i++) {
2868 view = &views[i];
2869 if (view->pipe)
2870 report("Stopped loading the %s view", view->name),
2871 end_update(view, TRUE);
2872 }
2873 break;
2874
2875 case REQ_SHOW_VERSION:
2876 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
2877 return TRUE;
2878
2879 case REQ_SCREEN_RESIZE:
2880 resize_display();
2881 /* Fall-through */
2882 case REQ_SCREEN_REDRAW:
2883 redraw_display();
2884 break;
2885
2886 case REQ_EDIT:
2887 report("Nothing to edit");
2888 break;
2889
2890 case REQ_ENTER:
2891 report("Nothing to enter");
2892 break;
2893
2894 case REQ_VIEW_CLOSE:
2895 /* XXX: Mark closed views by letting view->parent point to the
2896 * view itself. Parents to closed view should never be
2897 * followed. */
2898 if (view->parent &&
2899 view->parent->parent != view->parent) {
2900 memset(display, 0, sizeof(display));
2901 current_view = 0;
2902 display[current_view] = view->parent;
2903 view->parent = view;
2904 resize_display();
2905 redraw_display();
2906 report("");
2907 break;
2908 }
2909 /* Fall-through */
2910 case REQ_QUIT:
2911 return FALSE;
2912
2913 default:
2914 report("Unknown key, press 'h' for help");
2915 return TRUE;
2916 }
2917
2918 return TRUE;
2919 }
2920
2921
2922 /*
2923 * Pager backend
2924 */
2925
2926 static bool
2927 pager_draw(struct view *view, struct line *line, unsigned int lineno)
2928 {
2929 char *text = line->data;
2930
2931 if (opt_line_number && draw_lineno(view, lineno))
2932 return TRUE;
2933
2934 draw_text(view, line->type, text, TRUE);
2935 return TRUE;
2936 }
2937
2938 static bool
2939 add_describe_ref(char *buf, size_t *bufpos, const char *commit_id, const char *sep)
2940 {
2941 char refbuf[SIZEOF_STR];
2942 char *ref = NULL;
2943 FILE *pipe;
2944
2945 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2946 return TRUE;
2947
2948 pipe = popen(refbuf, "r");
2949 if (!pipe)
2950 return TRUE;
2951
2952 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2953 ref = chomp_string(ref);
2954 pclose(pipe);
2955
2956 if (!ref || !*ref)
2957 return TRUE;
2958
2959 /* This is the only fatal call, since it can "corrupt" the buffer. */
2960 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2961 return FALSE;
2962
2963 return TRUE;
2964 }
2965
2966 static void
2967 add_pager_refs(struct view *view, struct line *line)
2968 {
2969 char buf[SIZEOF_STR];
2970 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
2971 struct ref **refs;
2972 size_t bufpos = 0, refpos = 0;
2973 const char *sep = "Refs: ";
2974 bool is_tag = FALSE;
2975
2976 assert(line->type == LINE_COMMIT);
2977
2978 refs = get_refs(commit_id);
2979 if (!refs) {
2980 if (view == VIEW(REQ_VIEW_DIFF))
2981 goto try_add_describe_ref;
2982 return;
2983 }
2984
2985 do {
2986 struct ref *ref = refs[refpos];
2987 const char *fmt = ref->tag ? "%s[%s]" :
2988 ref->remote ? "%s<%s>" : "%s%s";
2989
2990 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2991 return;
2992 sep = ", ";
2993 if (ref->tag)
2994 is_tag = TRUE;
2995 } while (refs[refpos++]->next);
2996
2997 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2998 try_add_describe_ref:
2999 /* Add <tag>-g<commit_id> "fake" reference. */
3000 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
3001 return;
3002 }
3003
3004 if (bufpos == 0)
3005 return;
3006
3007 if (!realloc_lines(view, view->line_size + 1))
3008 return;
3009
3010 add_line_text(view, buf, LINE_PP_REFS);
3011 }
3012
3013 static bool
3014 pager_read(struct view *view, char *data)
3015 {
3016 struct line *line;
3017
3018 if (!data)
3019 return TRUE;
3020
3021 line = add_line_text(view, data, get_line_type(data));
3022 if (!line)
3023 return FALSE;
3024
3025 if (line->type == LINE_COMMIT &&
3026 (view == VIEW(REQ_VIEW_DIFF) ||
3027 view == VIEW(REQ_VIEW_LOG)))
3028 add_pager_refs(view, line);
3029
3030 return TRUE;
3031 }
3032
3033 static enum request
3034 pager_request(struct view *view, enum request request, struct line *line)
3035 {
3036 int split = 0;
3037
3038 if (request != REQ_ENTER)
3039 return request;
3040
3041 if (line->type == LINE_COMMIT &&
3042 (view == VIEW(REQ_VIEW_LOG) ||
3043 view == VIEW(REQ_VIEW_PAGER))) {
3044 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3045 split = 1;
3046 }
3047
3048 /* Always scroll the view even if it was split. That way
3049 * you can use Enter to scroll through the log view and
3050 * split open each commit diff. */
3051 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3052
3053 /* FIXME: A minor workaround. Scrolling the view will call report("")
3054 * but if we are scrolling a non-current view this won't properly
3055 * update the view title. */
3056 if (split)
3057 update_view_title(view);
3058
3059 return REQ_NONE;
3060 }
3061
3062 static bool
3063 pager_grep(struct view *view, struct line *line)
3064 {
3065 regmatch_t pmatch;
3066 char *text = line->data;
3067
3068 if (!*text)
3069 return FALSE;
3070
3071 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3072 return FALSE;
3073
3074 return TRUE;
3075 }
3076
3077 static void
3078 pager_select(struct view *view, struct line *line)
3079 {
3080 if (line->type == LINE_COMMIT) {
3081 char *text = (char *)line->data + STRING_SIZE("commit ");
3082
3083 if (view != VIEW(REQ_VIEW_PAGER))
3084 string_copy_rev(view->ref, text);
3085 string_copy_rev(ref_commit, text);
3086 }
3087 }
3088
3089 static struct view_ops pager_ops = {
3090 "line",
3091 NULL,
3092 pager_read,
3093 pager_draw,
3094 pager_request,
3095 pager_grep,
3096 pager_select,
3097 };
3098
3099 static enum request
3100 log_request(struct view *view, enum request request, struct line *line)
3101 {
3102 switch (request) {
3103 case REQ_REFRESH:
3104 load_refs();
3105 open_view(view, REQ_VIEW_LOG, OPEN_REFRESH);
3106 return REQ_NONE;
3107 default:
3108 return pager_request(view, request, line);
3109 }
3110 }
3111
3112 static struct view_ops log_ops = {
3113 "line",
3114 NULL,
3115 pager_read,
3116 pager_draw,
3117 log_request,
3118 pager_grep,
3119 pager_select,
3120 };
3121
3122
3123 /*
3124 * Help backend
3125 */
3126
3127 static bool
3128 help_open(struct view *view)
3129 {
3130 char buf[BUFSIZ];
3131 int lines = ARRAY_SIZE(req_info) + 2;
3132 int i;
3133
3134 if (view->lines > 0)
3135 return TRUE;
3136
3137 for (i = 0; i < ARRAY_SIZE(req_info); i++)
3138 if (!req_info[i].request)
3139 lines++;
3140
3141 lines += run_requests + 1;
3142
3143 view->line = calloc(lines, sizeof(*view->line));
3144 if (!view->line)
3145 return FALSE;
3146
3147 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3148
3149 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3150 const char *key;
3151
3152 if (req_info[i].request == REQ_NONE)
3153 continue;
3154
3155 if (!req_info[i].request) {
3156 add_line_text(view, "", LINE_DEFAULT);
3157 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3158 continue;
3159 }
3160
3161 key = get_key(req_info[i].request);
3162 if (!*key)
3163 key = "(no key defined)";
3164
3165 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
3166 continue;
3167
3168 add_line_text(view, buf, LINE_DEFAULT);
3169 }
3170
3171 if (run_requests) {
3172 add_line_text(view, "", LINE_DEFAULT);
3173 add_line_text(view, "External commands:", LINE_DEFAULT);
3174 }
3175
3176 for (i = 0; i < run_requests; i++) {
3177 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3178 const char *key;
3179
3180 if (!req)
3181 continue;
3182
3183 key = get_key_name(req->key);
3184 if (!*key)
3185 key = "(no key defined)";
3186
3187 if (!string_format(buf, " %-10s %-14s `%s`",
3188 keymap_table[req->keymap].name,
3189 key, req->cmd))
3190 continue;
3191
3192 add_line_text(view, buf, LINE_DEFAULT);
3193 }
3194
3195 return TRUE;
3196 }
3197
3198 static struct view_ops help_ops = {
3199 "line",
3200 help_open,
3201 NULL,
3202 pager_draw,
3203 pager_request,
3204 pager_grep,
3205 pager_select,
3206 };
3207
3208
3209 /*
3210 * Tree backend
3211 */
3212
3213 struct tree_stack_entry {
3214 struct tree_stack_entry *prev; /* Entry below this in the stack */
3215 unsigned long lineno; /* Line number to restore */
3216 char *name; /* Position of name in opt_path */
3217 };
3218
3219 /* The top of the path stack. */
3220 static struct tree_stack_entry *tree_stack = NULL;
3221 unsigned long tree_lineno = 0;
3222
3223 static void
3224 pop_tree_stack_entry(void)
3225 {
3226 struct tree_stack_entry *entry = tree_stack;
3227
3228 tree_lineno = entry->lineno;
3229 entry->name[0] = 0;
3230 tree_stack = entry->prev;
3231 free(entry);
3232 }
3233
3234 static void
3235 push_tree_stack_entry(const char *name, unsigned long lineno)
3236 {
3237 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3238 size_t pathlen = strlen(opt_path);
3239
3240 if (!entry)
3241 return;
3242
3243 entry->prev = tree_stack;
3244 entry->name = opt_path + pathlen;
3245 tree_stack = entry;
3246
3247 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3248 pop_tree_stack_entry();
3249 return;
3250 }
3251
3252 /* Move the current line to the first tree entry. */
3253 tree_lineno = 1;
3254 entry->lineno = lineno;
3255 }
3256
3257 /* Parse output from git-ls-tree(1):
3258 *
3259 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
3260 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
3261 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3262 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
3263 */
3264
3265 #define SIZEOF_TREE_ATTR \
3266 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
3267
3268 #define TREE_UP_FORMAT "040000 tree %s\t.."
3269
3270 static int
3271 tree_compare_entry(enum line_type type1, const char *name1,
3272 enum line_type type2, const char *name2)
3273 {
3274 if (type1 != type2) {
3275 if (type1 == LINE_TREE_DIR)
3276 return -1;
3277 return 1;
3278 }
3279
3280 return strcmp(name1, name2);
3281 }
3282
3283 static const char *
3284 tree_path(struct line *line)
3285 {
3286 const char *path = line->data;
3287
3288 return path + SIZEOF_TREE_ATTR;
3289 }
3290
3291 static bool
3292 tree_read(struct view *view, char *text)
3293 {
3294 size_t textlen = text ? strlen(text) : 0;
3295 char buf[SIZEOF_STR];
3296 unsigned long pos;
3297 enum line_type type;
3298 bool first_read = view->lines == 0;
3299
3300 if (!text)
3301 return TRUE;
3302 if (textlen <= SIZEOF_TREE_ATTR)
3303 return FALSE;
3304
3305 type = text[STRING_SIZE("100644 ")] == 't'
3306 ? LINE_TREE_DIR : LINE_TREE_FILE;
3307
3308 if (first_read) {
3309 /* Add path info line */
3310 if (!string_format(buf, "Directory path /%s", opt_path) ||
3311 !realloc_lines(view, view->line_size + 1) ||
3312 !add_line_text(view, buf, LINE_DEFAULT))
3313 return FALSE;
3314
3315 /* Insert "link" to parent directory. */
3316 if (*opt_path) {
3317 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
3318 !realloc_lines(view, view->line_size + 1) ||
3319 !add_line_text(view, buf, LINE_TREE_DIR))
3320 return FALSE;
3321 }
3322 }
3323
3324 /* Strip the path part ... */
3325 if (*opt_path) {
3326 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3327 size_t striplen = strlen(opt_path);
3328 char *path = text + SIZEOF_TREE_ATTR;
3329
3330 if (pathlen > striplen)
3331 memmove(path, path + striplen,
3332 pathlen - striplen + 1);
3333 }
3334
3335 /* Skip "Directory ..." and ".." line. */
3336 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
3337 struct line *line = &view->line[pos];
3338 const char *path1 = tree_path(line);
3339 char *path2 = text + SIZEOF_TREE_ATTR;
3340 int cmp = tree_compare_entry(line->type, path1, type, path2);
3341
3342 if (cmp <= 0)
3343 continue;
3344
3345 text = strdup(text);
3346 if (!text)
3347 return FALSE;
3348
3349 if (view->lines > pos)
3350 memmove(&view->line[pos + 1], &view->line[pos],
3351 (view->lines - pos) * sizeof(*line));
3352
3353 line = &view->line[pos];
3354 line->data = text;
3355 line->type = type;
3356 view->lines++;
3357 return TRUE;
3358 }
3359
3360 if (!add_line_text(view, text, type))
3361 return FALSE;
3362
3363 if (tree_lineno > view->lineno) {
3364 view->lineno = tree_lineno;
3365 tree_lineno = 0;
3366 }
3367
3368 return TRUE;
3369 }
3370
3371 static enum request
3372 tree_request(struct view *view, enum request request, struct line *line)
3373 {
3374 enum open_flags flags;
3375
3376 switch (request) {
3377 case REQ_VIEW_BLAME:
3378 if (line->type != LINE_TREE_FILE) {
3379 report("Blame only supported for files");
3380 return REQ_NONE;
3381 }
3382
3383 string_copy(opt_ref, view->vid);
3384 return request;
3385
3386 case REQ_EDIT:
3387 if (line->type != LINE_TREE_FILE) {
3388 report("Edit only supported for files");
3389 } else if (!is_head_commit(view->vid)) {
3390 report("Edit only supported for files in the current work tree");
3391 } else {
3392 open_editor(TRUE, opt_file);
3393 }
3394 return REQ_NONE;
3395
3396 case REQ_TREE_PARENT:
3397 if (!*opt_path) {
3398 /* quit view if at top of tree */
3399 return REQ_VIEW_CLOSE;
3400 }
3401 /* fake 'cd ..' */
3402 line = &view->line[1];
3403 break;
3404
3405 case REQ_ENTER:
3406 break;
3407
3408 default:
3409 return request;
3410 }
3411
3412 /* Cleanup the stack if the tree view is at a different tree. */
3413 while (!*opt_path && tree_stack)
3414 pop_tree_stack_entry();
3415
3416 switch (line->type) {
3417 case LINE_TREE_DIR:
3418 /* Depending on whether it is a subdir or parent (updir?) link
3419 * mangle the path buffer. */
3420 if (line == &view->line[1] && *opt_path) {
3421 pop_tree_stack_entry();
3422
3423 } else {
3424 const char *basename = tree_path(line);
3425
3426 push_tree_stack_entry(basename, view->lineno);
3427 }
3428
3429 /* Trees and subtrees share the same ID, so they are not not
3430 * unique like blobs. */
3431 flags = OPEN_RELOAD;
3432 request = REQ_VIEW_TREE;
3433 break;
3434
3435 case LINE_TREE_FILE:
3436 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3437 request = REQ_VIEW_BLOB;
3438 break;
3439
3440 default:
3441 return TRUE;
3442 }
3443
3444 open_view(view, request, flags);
3445 if (request == REQ_VIEW_TREE) {
3446 view->lineno = tree_lineno;
3447 }
3448
3449 return REQ_NONE;
3450 }
3451
3452 static void
3453 tree_select(struct view *view, struct line *line)
3454 {
3455 char *text = (char *)line->data + STRING_SIZE("100644 blob ");
3456
3457 if (line->type == LINE_TREE_FILE) {
3458 string_copy_rev(ref_blob, text);
3459 string_format(opt_file, "%s%s", opt_path, tree_path(line));
3460
3461 } else if (line->type != LINE_TREE_DIR) {
3462 return;
3463 }
3464
3465 string_copy_rev(view->ref, text);
3466 }
3467
3468 static struct view_ops tree_ops = {
3469 "file",
3470 NULL,
3471 tree_read,
3472 pager_draw,
3473 tree_request,
3474 pager_grep,
3475 tree_select,
3476 };
3477
3478 static bool
3479 blob_read(struct view *view, char *line)
3480 {
3481 if (!line)
3482 return TRUE;
3483 return add_line_text(view, line, LINE_DEFAULT) != NULL;
3484 }
3485
3486 static struct view_ops blob_ops = {
3487 "line",
3488 NULL,
3489 blob_read,
3490 pager_draw,
3491 pager_request,
3492 pager_grep,
3493 pager_select,
3494 };
3495
3496 /*
3497 * Blame backend
3498 *
3499 * Loading the blame view is a two phase job:
3500 *
3501 * 1. File content is read either using opt_file from the
3502 * filesystem or using git-cat-file.
3503 * 2. Then blame information is incrementally added by
3504 * reading output from git-blame.
3505 */
3506
3507 struct blame_commit {
3508 char id[SIZEOF_REV]; /* SHA1 ID. */
3509 char title[128]; /* First line of the commit message. */
3510 char author[75]; /* Author of the commit. */
3511 struct tm time; /* Date from the author ident. */
3512 char filename[128]; /* Name of file. */
3513 };
3514
3515 struct blame {
3516 struct blame_commit *commit;
3517 char text[1];
3518 };
3519
3520 #define BLAME_CAT_FILE_CMD "git cat-file blob %s:%s"
3521 #define BLAME_INCREMENTAL_CMD "git blame --incremental %s -- %s"
3522
3523 static bool
3524 blame_open(struct view *view)
3525 {
3526 char path[SIZEOF_STR];
3527 char ref[SIZEOF_STR] = "";
3528
3529 if (sq_quote(path, 0, opt_file) >= sizeof(path))
3530 return FALSE;
3531
3532 if (*opt_ref && sq_quote(ref, 0, opt_ref) >= sizeof(ref))
3533 return FALSE;
3534
3535 if (*opt_ref || !(view->pipe = fopen(opt_file, "r"))) {
3536 const char *id = *opt_ref ? ref : "HEAD";
3537
3538 if (!string_format(view->cmd, BLAME_CAT_FILE_CMD, id, path) ||
3539 !(view->pipe = popen(view->cmd, "r")))
3540 return FALSE;
3541 }
3542
3543 setup_update(view, opt_file);
3544 string_format(view->ref, "%s ...", opt_file);
3545
3546 return TRUE;
3547 }
3548
3549 static struct blame_commit *
3550 get_blame_commit(struct view *view, const char *id)
3551 {
3552 size_t i;
3553
3554 for (i = 0; i < view->lines; i++) {
3555 struct blame *blame = view->line[i].data;
3556
3557 if (!blame->commit)
3558 continue;
3559
3560 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
3561 return blame->commit;
3562 }
3563
3564 {
3565 struct blame_commit *commit = calloc(1, sizeof(*commit));
3566
3567 if (commit)
3568 string_ncopy(commit->id, id, SIZEOF_REV);
3569 return commit;
3570 }
3571 }
3572
3573 static bool
3574 parse_number(const char **posref, size_t *number, size_t min, size_t max)
3575 {
3576 const char *pos = *posref;
3577
3578 *posref = NULL;
3579 pos = strchr(pos + 1, ' ');
3580 if (!pos || !isdigit(pos[1]))
3581 return FALSE;
3582 *number = atoi(pos + 1);
3583 if (*number < min || *number > max)
3584 return FALSE;
3585
3586 *posref = pos;
3587 return TRUE;
3588 }
3589
3590 static struct blame_commit *
3591 parse_blame_commit(struct view *view, const char *text, int *blamed)
3592 {
3593 struct blame_commit *commit;
3594 struct blame *blame;
3595 const char *pos = text + SIZEOF_REV - 1;
3596 size_t lineno;
3597 size_t group;
3598
3599 if (strlen(text) <= SIZEOF_REV || *pos != ' ')
3600 return NULL;
3601
3602 if (!parse_number(&pos, &lineno, 1, view->lines) ||
3603 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
3604 return NULL;
3605
3606 commit = get_blame_commit(view, text);
3607 if (!commit)
3608 return NULL;
3609
3610 *blamed += group;
3611 while (group--) {
3612 struct line *line = &view->line[lineno + group - 1];
3613
3614 blame = line->data;
3615 blame->commit = commit;
3616 line->dirty = 1;
3617 }
3618
3619 return commit;
3620 }
3621
3622 static bool
3623 blame_read_file(struct view *view, const char *line, bool *read_file)
3624 {
3625 if (!line) {
3626 char ref[SIZEOF_STR] = "";
3627 char path[SIZEOF_STR];
3628 FILE *pipe = NULL;
3629
3630 if (view->lines == 0 && !view->parent)
3631 die("No blame exist for %s", view->vid);
3632
3633 if (view->lines == 0 ||
3634 sq_quote(path, 0, opt_file) >= sizeof(path) ||
3635 (*opt_ref && sq_quote(ref, 0, opt_ref) >= sizeof(ref)) ||
3636 !string_format(view->cmd, BLAME_INCREMENTAL_CMD, ref, path) ||
3637 !(pipe = popen(view->cmd, "r"))) {
3638 report("Failed to load blame data");
3639 return TRUE;
3640 }
3641
3642 fclose(view->pipe);
3643 view->pipe = pipe;
3644 *read_file = FALSE;
3645 return FALSE;
3646
3647 } else {
3648 size_t linelen = strlen(line);
3649 struct blame *blame = malloc(sizeof(*blame) + linelen);
3650
3651 blame->commit = NULL;
3652 strncpy(blame->text, line, linelen);
3653 blame->text[linelen] = 0;
3654 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
3655 }
3656 }
3657
3658 static bool
3659 match_blame_header(const char *name, char **line)
3660 {
3661 size_t namelen = strlen(name);
3662 bool matched = !strncmp(name, *line, namelen);
3663
3664 if (matched)
3665 *line += namelen;
3666
3667 return matched;
3668 }
3669
3670 static bool
3671 blame_read(struct view *view, char *line)
3672 {
3673 static struct blame_commit *commit = NULL;
3674 static int blamed = 0;
3675 static time_t author_time;
3676 static bool read_file = TRUE;
3677
3678 if (read_file)
3679 return blame_read_file(view, line, &read_file);
3680
3681 if (!line) {
3682 /* Reset all! */
3683 commit = NULL;
3684 blamed = 0;
3685 read_file = TRUE;
3686 string_format(view->ref, "%s", view->vid);
3687 if (view_is_displayed(view)) {
3688 update_view_title(view);
3689 redraw_view_from(view, 0);
3690 }
3691 return TRUE;
3692 }
3693
3694 if (!commit) {
3695 commit = parse_blame_commit(view, line, &blamed);
3696 string_format(view->ref, "%s %2d%%", view->vid,
3697 blamed * 100 / view->lines);
3698
3699 } else if (match_blame_header("author ", &line)) {
3700 string_ncopy(commit->author, line, strlen(line));
3701
3702 } else if (match_blame_header("author-time ", &line)) {
3703 author_time = (time_t) atol(line);
3704
3705 } else if (match_blame_header("author-tz ", &line)) {
3706 long tz;
3707
3708 tz = ('0' - line[1]) * 60 * 60 * 10;
3709 tz += ('0' - line[2]) * 60 * 60;
3710 tz += ('0' - line[3]) * 60;
3711 tz += ('0' - line[4]) * 60;
3712
3713 if (line[0] == '-')
3714 tz = -tz;
3715
3716 author_time -= tz;
3717 gmtime_r(&author_time, &commit->time);
3718
3719 } else if (match_blame_header("summary ", &line)) {
3720 string_ncopy(commit->title, line, strlen(line));
3721
3722 } else if (match_blame_header("filename ", &line)) {
3723 string_ncopy(commit->filename, line, strlen(line));
3724 commit = NULL;
3725 }
3726
3727 return TRUE;
3728 }
3729
3730 static bool
3731 blame_draw(struct view *view, struct line *line, unsigned int lineno)
3732 {
3733 struct blame *blame = line->data;
3734 struct tm *time = NULL;
3735 const char *id = NULL, *author = NULL;
3736
3737 if (blame->commit && *blame->commit->filename) {
3738 id = blame->commit->id;
3739 author = blame->commit->author;
3740 time = &blame->commit->time;
3741 }
3742
3743 if (opt_date && draw_date(view, time))
3744 return TRUE;
3745
3746 if (opt_author &&
3747 draw_field(view, LINE_MAIN_AUTHOR, author, opt_author_cols, TRUE))
3748 return TRUE;
3749
3750 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
3751 return TRUE;
3752
3753 if (draw_lineno(view, lineno))
3754 return TRUE;
3755
3756 draw_text(view, LINE_DEFAULT, blame->text, TRUE);
3757 return TRUE;
3758 }
3759
3760 static enum request
3761 blame_request(struct view *view, enum request request, struct line *line)
3762 {
3763 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3764 struct blame *blame = line->data;
3765
3766 switch (request) {
3767 case REQ_ENTER:
3768 if (!blame->commit) {
3769 report("No commit loaded yet");
3770 break;
3771 }
3772
3773 if (!strcmp(blame->commit->id, NULL_ID)) {
3774 char path[SIZEOF_STR];
3775
3776 if (sq_quote(path, 0, view->vid) >= sizeof(path))
3777 break;
3778 string_format(opt_cmd, "git diff-index --root --patch-with-stat -C -M --cached HEAD -- %s 2>/dev/null", path);
3779 }
3780
3781 open_view(view, REQ_VIEW_DIFF, flags);
3782 break;
3783
3784 default:
3785 return request;
3786 }
3787
3788 return REQ_NONE;
3789 }
3790
3791 static bool
3792 blame_grep(struct view *view, struct line *line)
3793 {
3794 struct blame *blame = line->data;
3795 struct blame_commit *commit = blame->commit;
3796 regmatch_t pmatch;
3797
3798 #define MATCH(text, on) \
3799 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3800
3801 if (commit) {
3802 char buf[DATE_COLS + 1];
3803
3804 if (MATCH(commit->title, 1) ||
3805 MATCH(commit->author, opt_author) ||
3806 MATCH(commit->id, opt_date))
3807 return TRUE;
3808
3809 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
3810 MATCH(buf, 1))
3811 return TRUE;
3812 }
3813
3814 return MATCH(blame->text, 1);
3815
3816 #undef MATCH
3817 }
3818
3819 static void
3820 blame_select(struct view *view, struct line *line)
3821 {
3822 struct blame *blame = line->data;
3823 struct blame_commit *commit = blame->commit;
3824
3825 if (!commit)
3826 return;
3827
3828 if (!strcmp(commit->id, NULL_ID))
3829 string_ncopy(ref_commit, "HEAD", 4);
3830 else
3831 string_copy_rev(ref_commit, commit->id);
3832 }
3833
3834 static struct view_ops blame_ops = {
3835 "line",
3836 blame_open,
3837 blame_read,
3838 blame_draw,
3839 blame_request,
3840 blame_grep,
3841 blame_select,
3842 };
3843
3844 /*
3845 * Status backend
3846 */
3847
3848 struct status {
3849 char status;
3850 struct {
3851 mode_t mode;
3852 char rev[SIZEOF_REV];
3853 char name[SIZEOF_STR];
3854 } old;
3855 struct {
3856 mode_t mode;
3857 char rev[SIZEOF_REV];
3858 char name[SIZEOF_STR];
3859 } new;
3860 };
3861
3862 static char status_onbranch[SIZEOF_STR];
3863 static struct status stage_status;
3864 static enum line_type stage_line_type;
3865 static size_t stage_chunks;
3866 static int *stage_chunk;
3867
3868 /* This should work even for the "On branch" line. */
3869 static inline bool
3870 status_has_none(struct view *view, struct line *line)
3871 {
3872 return line < view->line + view->lines && !line[1].data;
3873 }
3874
3875 /* Get fields from the diff line:
3876 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
3877 */
3878 static inline bool
3879 status_get_diff(struct status *file, const char *buf, size_t bufsize)
3880 {
3881 const char *old_mode = buf + 1;
3882 const char *new_mode = buf + 8;
3883 const char *old_rev = buf + 15;
3884 const char *new_rev = buf + 56;
3885 const char *status = buf + 97;
3886
3887 if (bufsize < 99 ||
3888 old_mode[-1] != ':' ||
3889 new_mode[-1] != ' ' ||
3890 old_rev[-1] != ' ' ||
3891 new_rev[-1] != ' ' ||
3892 status[-1] != ' ')
3893 return FALSE;
3894
3895 file->status = *status;
3896
3897 string_copy_rev(file->old.rev, old_rev);
3898 string_copy_rev(file->new.rev, new_rev);
3899
3900 file->old.mode = strtoul(old_mode, NULL, 8);
3901 file->new.mode = strtoul(new_mode, NULL, 8);
3902
3903 file->old.name[0] = file->new.name[0] = 0;
3904
3905 return TRUE;
3906 }
3907
3908 static bool
3909 status_run(struct view *view, const char cmd[], char status, enum line_type type)
3910 {
3911 struct status *file = NULL;
3912 struct status *unmerged = NULL;
3913 char buf[SIZEOF_STR * 4];
3914 size_t bufsize = 0;
3915 FILE *pipe;
3916
3917 pipe = popen(cmd, "r");
3918 if (!pipe)
3919 return FALSE;
3920
3921 add_line_data(view, NULL, type);
3922
3923 while (!feof(pipe) && !ferror(pipe)) {
3924 char *sep;
3925 size_t readsize;
3926
3927 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
3928 if (!readsize)
3929 break;
3930 bufsize += readsize;
3931
3932 /* Process while we have NUL chars. */
3933 while ((sep = memchr(buf, 0, bufsize))) {
3934 size_t sepsize = sep - buf + 1;
3935
3936 if (!file) {
3937 if (!realloc_lines(view, view->line_size + 1))
3938 goto error_out;
3939
3940 file = calloc(1, sizeof(*file));
3941 if (!file)
3942 goto error_out;
3943
3944 add_line_data(view, file, type);
3945 }
3946
3947 /* Parse diff info part. */
3948 if (status) {
3949 file->status = status;
3950 if (status == 'A')
3951 string_copy(file->old.rev, NULL_ID);
3952
3953 } else if (!file->status) {
3954 if (!status_get_diff(file, buf, sepsize))
3955 goto error_out;
3956
3957 bufsize -= sepsize;
3958 memmove(buf, sep + 1, bufsize);
3959
3960 sep = memchr(buf, 0, bufsize);
3961 if (!sep)
3962 break;
3963 sepsize = sep - buf + 1;
3964
3965 /* Collapse all 'M'odified entries that
3966 * follow a associated 'U'nmerged entry.
3967 */
3968 if (file->status == 'U') {
3969 unmerged = file;
3970
3971 } else if (unmerged) {
3972 int collapse = !strcmp(buf, unmerged->new.name);
3973
3974 unmerged = NULL;
3975 if (collapse) {
3976 free(file);
3977 view->lines--;
3978 continue;
3979 }
3980 }
3981 }
3982
3983 /* Grab the old name for rename/copy. */
3984 if (!*file->old.name &&
3985 (file->status == 'R' || file->status == 'C')) {
3986 sepsize = sep - buf + 1;
3987 string_ncopy(file->old.name, buf, sepsize);
3988 bufsize -= sepsize;
3989 memmove(buf, sep + 1, bufsize);
3990
3991 sep = memchr(buf, 0, bufsize);
3992 if (!sep)
3993 break;
3994 sepsize = sep - buf + 1;
3995 }
3996
3997 /* git-ls-files just delivers a NUL separated
3998 * list of file names similar to the second half
3999 * of the git-diff-* output. */
4000 string_ncopy(file->new.name, buf, sepsize);
4001 if (!*file->old.name)
4002 string_copy(file->old.name, file->new.name);
4003 bufsize -= sepsize;
4004 memmove(buf, sep + 1, bufsize);
4005 file = NULL;
4006 }
4007 }
4008
4009 if (ferror(pipe)) {
4010 error_out:
4011 pclose(pipe);
4012 return FALSE;
4013 }
4014
4015 if (!view->line[view->lines - 1].data)
4016 add_line_data(view, NULL, LINE_STAT_NONE);
4017
4018 pclose(pipe);
4019 return TRUE;
4020 }
4021
4022 /* Don't show unmerged entries in the staged section. */
4023 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --diff-filter=ACDMRTXB --cached -M HEAD"
4024 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
4025 #define STATUS_LIST_OTHER_CMD \
4026 "git ls-files -z --others --exclude-standard"
4027 #define STATUS_LIST_NO_HEAD_CMD \
4028 "git ls-files -z --cached --exclude-standard"
4029
4030 #define STATUS_DIFF_INDEX_SHOW_CMD \
4031 "git diff-index --root --patch-with-stat -C -M --cached HEAD -- %s %s 2>/dev/null"
4032
4033 #define STATUS_DIFF_FILES_SHOW_CMD \
4034 "git diff-files --root --patch-with-stat -C -M -- %s %s 2>/dev/null"
4035
4036 #define STATUS_DIFF_NO_HEAD_SHOW_CMD \
4037 "git diff --no-color --patch-with-stat /dev/null %s 2>/dev/null"
4038
4039 /* First parse staged info using git-diff-index(1), then parse unstaged
4040 * info using git-diff-files(1), and finally untracked files using
4041 * git-ls-files(1). */
4042 static bool
4043 status_open(struct view *view)
4044 {
4045 unsigned long prev_lineno = view->lineno;
4046
4047 reset_view(view);
4048
4049 if (!realloc_lines(view, view->line_size + 7))
4050 return FALSE;
4051
4052 add_line_data(view, NULL, LINE_STAT_HEAD);
4053 if (is_initial_commit())
4054 string_copy(status_onbranch, "Initial commit");
4055 else if (!*opt_head)
4056 string_copy(status_onbranch, "Not currently on any branch");
4057 else if (!string_format(status_onbranch, "On branch %s", opt_head))
4058 return FALSE;
4059
4060 system("git update-index -q --refresh >/dev/null 2>/dev/null");
4061
4062 if (is_initial_commit()) {
4063 if (!status_run(view, STATUS_LIST_NO_HEAD_CMD, 'A', LINE_STAT_STAGED))
4064 return FALSE;
4065 } else if (!status_run(view, STATUS_DIFF_INDEX_CMD, 0, LINE_STAT_STAGED)) {
4066 return FALSE;
4067 }
4068
4069 if (!status_run(view, STATUS_DIFF_FILES_CMD, 0, LINE_STAT_UNSTAGED) ||
4070 !status_run(view, STATUS_LIST_OTHER_CMD, '?', LINE_STAT_UNTRACKED))
4071 return FALSE;
4072
4073 /* If all went well restore the previous line number to stay in
4074 * the context or select a line with something that can be
4075 * updated. */
4076 if (prev_lineno >= view->lines)
4077 prev_lineno = view->lines - 1;
4078 while (prev_lineno < view->lines && !view->line[prev_lineno].data)
4079 prev_lineno++;
4080 while (prev_lineno > 0 && !view->line[prev_lineno].data)
4081 prev_lineno--;
4082
4083 /* If the above fails, always skip the "On branch" line. */
4084 if (prev_lineno < view->lines)
4085 view->lineno = prev_lineno;
4086 else
4087 view->lineno = 1;
4088
4089 if (view->lineno < view->offset)
4090 view->offset = view->lineno;
4091 else if (view->offset + view->height <= view->lineno)
4092 view->offset = view->lineno - view->height + 1;
4093
4094 return TRUE;
4095 }
4096
4097 static bool
4098 status_draw(struct view *view, struct line *line, unsigned int lineno)
4099 {
4100 struct status *status = line->data;
4101 enum line_type type;
4102 const char *text;
4103
4104 if (!status) {
4105 switch (line->type) {
4106 case LINE_STAT_STAGED:
4107 type = LINE_STAT_SECTION;
4108 text = "Changes to be committed:";
4109 break;
4110
4111 case LINE_STAT_UNSTAGED:
4112 type = LINE_STAT_SECTION;
4113 text = "Changed but not updated:";
4114 break;
4115
4116 case LINE_STAT_UNTRACKED:
4117 type = LINE_STAT_SECTION;
4118 text = "Untracked files:";
4119 break;
4120
4121 case LINE_STAT_NONE:
4122 type = LINE_DEFAULT;
4123 text = " (no files)";
4124 break;
4125
4126 case LINE_STAT_HEAD:
4127 type = LINE_STAT_HEAD;
4128 text = status_onbranch;
4129 break;
4130
4131 default:
4132 return FALSE;
4133 }
4134 } else {
4135 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4136
4137 buf[0] = status->status;
4138 if (draw_text(view, line->type, buf, TRUE))
4139 return TRUE;
4140 type = LINE_DEFAULT;
4141 text = status->new.name;
4142 }
4143
4144 draw_text(view, type, text, TRUE);
4145 return TRUE;
4146 }
4147
4148 static enum request
4149 status_enter(struct view *view, struct line *line)
4150 {
4151 struct status *status = line->data;
4152 char oldpath[SIZEOF_STR] = "";
4153 char newpath[SIZEOF_STR] = "";
4154 const char *info;
4155 size_t cmdsize = 0;
4156 enum open_flags split;
4157
4158 if (line->type == LINE_STAT_NONE ||
4159 (!status && line[1].type == LINE_STAT_NONE)) {
4160 report("No file to diff");
4161 return REQ_NONE;
4162 }
4163
4164 if (status) {
4165 if (sq_quote(oldpath, 0, status->old.name) >= sizeof(oldpath))
4166 return REQ_QUIT;
4167 /* Diffs for unmerged entries are empty when pasing the
4168 * new path, so leave it empty. */
4169 if (status->status != 'U' &&
4170 sq_quote(newpath, 0, status->new.name) >= sizeof(newpath))
4171 return REQ_QUIT;
4172 }
4173
4174 if (opt_cdup[0] &&
4175 line->type != LINE_STAT_UNTRACKED &&
4176 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
4177 return REQ_QUIT;
4178
4179 switch (line->type) {
4180 case LINE_STAT_STAGED:
4181 if (is_initial_commit()) {
4182 if (!string_format_from(opt_cmd, &cmdsize,
4183 STATUS_DIFF_NO_HEAD_SHOW_CMD,
4184 newpath))
4185 return REQ_QUIT;
4186 } else {
4187 if (!string_format_from(opt_cmd, &cmdsize,
4188 STATUS_DIFF_INDEX_SHOW_CMD,
4189 oldpath, newpath))
4190 return REQ_QUIT;
4191 }
4192
4193 if (status)
4194 info = "Staged changes to %s";
4195 else
4196 info = "Staged changes";
4197 break;
4198
4199 case LINE_STAT_UNSTAGED:
4200 if (!string_format_from(opt_cmd, &cmdsize,
4201 STATUS_DIFF_FILES_SHOW_CMD, oldpath, newpath))
4202 return REQ_QUIT;
4203 if (status)
4204 info = "Unstaged changes to %s";
4205 else
4206 info = "Unstaged changes";
4207 break;
4208
4209 case LINE_STAT_UNTRACKED:
4210 if (opt_pipe)
4211 return REQ_QUIT;
4212
4213 if (!status) {
4214 report("No file to show");
4215 return REQ_NONE;
4216 }
4217
4218 if (!suffixcmp(status->new.name, -1, "/")) {
4219 report("Cannot display a directory");
4220 return REQ_NONE;
4221 }
4222
4223 opt_pipe = fopen(status->new.name, "r");
4224 info = "Untracked file %s";
4225 break;
4226
4227 case LINE_STAT_HEAD:
4228 return REQ_NONE;
4229
4230 default:
4231 die("line type %d not handled in switch", line->type);
4232 }
4233
4234 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4235 open_view(view, REQ_VIEW_STAGE, OPEN_RELOAD | split);
4236 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4237 if (status) {
4238 stage_status = *status;
4239 } else {
4240 memset(&stage_status, 0, sizeof(stage_status));
4241 }
4242
4243 stage_line_type = line->type;
4244 stage_chunks = 0;
4245 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4246 }
4247
4248 return REQ_NONE;
4249 }
4250
4251 static bool
4252 status_exists(struct status *status, enum line_type type)
4253 {
4254 struct view *view = VIEW(REQ_VIEW_STATUS);
4255 struct line *line;
4256
4257 for (line = view->line; line < view->line + view->lines; line++) {
4258 struct status *pos = line->data;
4259
4260 if (line->type == type && pos &&
4261 !strcmp(status->new.name, pos->new.name))
4262 return TRUE;
4263 }
4264
4265 return FALSE;
4266 }
4267
4268
4269 static FILE *
4270 status_update_prepare(enum line_type type)
4271 {
4272 char cmd[SIZEOF_STR];
4273 size_t cmdsize = 0;
4274
4275 if (opt_cdup[0] &&
4276 type != LINE_STAT_UNTRACKED &&
4277 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
4278 return NULL;
4279
4280 switch (type) {
4281 case LINE_STAT_STAGED:
4282 string_add(cmd, cmdsize, "git update-index -z --index-info");
4283 break;
4284
4285 case LINE_STAT_UNSTAGED:
4286 case LINE_STAT_UNTRACKED:
4287 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
4288 break;
4289
4290 default:
4291 die("line type %d not handled in switch", type);
4292 }
4293
4294 return popen(cmd, "w");
4295 }
4296
4297 static bool
4298 status_update_write(FILE *pipe, struct status *status, enum line_type type)
4299 {
4300 char buf[SIZEOF_STR];
4301 size_t bufsize = 0;
4302 size_t written = 0;
4303
4304 switch (type) {
4305 case LINE_STAT_STAGED:
4306 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
4307 status->old.mode,
4308 status->old.rev,
4309 status->old.name, 0))
4310 return FALSE;
4311 break;
4312
4313 case LINE_STAT_UNSTAGED:
4314 case LINE_STAT_UNTRACKED:
4315 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
4316 return FALSE;
4317 break;
4318
4319 default:
4320 die("line type %d not handled in switch", type);
4321 }
4322
4323 while (!ferror(pipe) && written < bufsize) {
4324 written += fwrite(buf + written, 1, bufsize - written, pipe);
4325 }
4326
4327 return written == bufsize;
4328 }
4329
4330 static bool
4331 status_update_file(struct status *status, enum line_type type)
4332 {
4333 FILE *pipe = status_update_prepare(type);
4334 bool result;
4335
4336 if (!pipe)
4337 return FALSE;
4338
4339 result = status_update_write(pipe, status, type);
4340 pclose(pipe);
4341 return result;
4342 }
4343
4344 static bool
4345 status_update_files(struct view *view, struct line *line)
4346 {
4347 FILE *pipe = status_update_prepare(line->type);
4348 bool result = TRUE;
4349 struct line *pos = view->line + view->lines;
4350 int files = 0;
4351 int file, done;
4352
4353 if (!pipe)
4354 return FALSE;
4355
4356 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
4357 files++;
4358
4359 for (file = 0, done = 0; result && file < files; line++, file++) {
4360 int almost_done = file * 100 / files;
4361
4362 if (almost_done > done) {
4363 done = almost_done;
4364 string_format(view->ref, "updating file %u of %u (%d%% done)",
4365 file, files, done);
4366 update_view_title(view);
4367 }
4368 result = status_update_write(pipe, line->data, line->type);
4369 }
4370
4371 pclose(pipe);
4372 return result;
4373 }
4374
4375 static bool
4376 status_update(struct view *view)
4377 {
4378 struct line *line = &view->line[view->lineno];
4379
4380 assert(view->lines);
4381
4382 if (!line->data) {
4383 /* This should work even for the "On branch" line. */
4384 if (line < view->line + view->lines && !line[1].data) {
4385 report("Nothing to update");
4386 return FALSE;
4387 }
4388
4389 if (!status_update_files(view, line + 1)) {
4390 report("Failed to update file status");
4391 return FALSE;
4392 }
4393
4394 } else if (!status_update_file(line->data, line->type)) {
4395 report("Failed to update file status");
4396 return FALSE;
4397 }
4398
4399 return TRUE;
4400 }
4401
4402 static bool
4403 status_revert(struct status *status, enum line_type type, bool has_none)
4404 {
4405 if (!status || type != LINE_STAT_UNSTAGED) {
4406 if (type == LINE_STAT_STAGED) {
4407 report("Cannot revert changes to staged files");
4408 } else if (type == LINE_STAT_UNTRACKED) {
4409 report("Cannot revert changes to untracked files");
4410 } else if (has_none) {
4411 report("Nothing to revert");
4412 } else {
4413 report("Cannot revert changes to multiple files");
4414 }
4415 return FALSE;
4416
4417 } else {
4418 char cmd[SIZEOF_STR];
4419 char file_sq[SIZEOF_STR];
4420
4421 if (sq_quote(file_sq, 0, status->old.name) >= sizeof(file_sq) ||
4422 !string_format(cmd, "git checkout -- %s%s", opt_cdup, file_sq))
4423 return FALSE;
4424
4425 return run_confirm(cmd, "Are you sure you want to overwrite any changes?");
4426 }
4427 }
4428
4429 static enum request
4430 status_request(struct view *view, enum request request, struct line *line)
4431 {
4432 struct status *status = line->data;
4433
4434 switch (request) {
4435 case REQ_STATUS_UPDATE:
4436 if (!status_update(view))
4437 return REQ_NONE;
4438 break;
4439
4440 case REQ_STATUS_REVERT:
4441 if (!status_revert(status, line->type, status_has_none(view, line)))
4442 return REQ_NONE;
4443 break;
4444
4445 case REQ_STATUS_MERGE:
4446 if (!status || status->status != 'U') {
4447 report("Merging only possible for files with unmerged status ('U').");
4448 return REQ_NONE;
4449 }
4450 open_mergetool(status->new.name);
4451 break;
4452
4453 case REQ_EDIT:
4454 if (!status)
4455 return request;
4456 if (status->status == 'D') {
4457 report("File has been deleted.");
4458 return REQ_NONE;
4459 }
4460
4461 open_editor(status->status != '?', status->new.name);
4462 break;
4463
4464 case REQ_VIEW_BLAME:
4465 if (status) {
4466 string_copy(opt_file, status->new.name);
4467 opt_ref[0] = 0;
4468 }
4469 return request;
4470
4471 case REQ_ENTER:
4472 /* After returning the status view has been split to
4473 * show the stage view. No further reloading is
4474 * necessary. */
4475 status_enter(view, line);
4476 return REQ_NONE;
4477
4478 case REQ_REFRESH:
4479 /* Simply reload the view. */
4480 break;
4481
4482 default:
4483 return request;
4484 }
4485
4486 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
4487
4488 return REQ_NONE;
4489 }
4490
4491 static void
4492 status_select(struct view *view, struct line *line)
4493 {
4494 struct status *status = line->data;
4495 char file[SIZEOF_STR] = "all files";
4496 const char *text;
4497 const char *key;
4498
4499 if (status && !string_format(file, "'%s'", status->new.name))
4500 return;
4501
4502 if (!status && line[1].type == LINE_STAT_NONE)
4503 line++;
4504
4505 switch (line->type) {
4506 case LINE_STAT_STAGED:
4507 text = "Press %s to unstage %s for commit";
4508 break;
4509
4510 case LINE_STAT_UNSTAGED:
4511 text = "Press %s to stage %s for commit";
4512 break;
4513
4514 case LINE_STAT_UNTRACKED:
4515 text = "Press %s to stage %s for addition";
4516 break;
4517
4518 case LINE_STAT_HEAD:
4519 case LINE_STAT_NONE:
4520 text = "Nothing to update";
4521 break;
4522
4523 default:
4524 die("line type %d not handled in switch", line->type);
4525 }
4526
4527 if (status && status->status == 'U') {
4528 text = "Press %s to resolve conflict in %s";
4529 key = get_key(REQ_STATUS_MERGE);
4530
4531 } else {
4532 key = get_key(REQ_STATUS_UPDATE);
4533 }
4534
4535 string_format(view->ref, text, key, file);
4536 }
4537
4538 static bool
4539 status_grep(struct view *view, struct line *line)
4540 {
4541 struct status *status = line->data;
4542 enum { S_STATUS, S_NAME, S_END } state;
4543 char buf[2] = "?";
4544 regmatch_t pmatch;
4545
4546 if (!status)
4547 return FALSE;
4548
4549 for (state = S_STATUS; state < S_END; state++) {
4550 const char *text;
4551
4552 switch (state) {
4553 case S_NAME: text = status->new.name; break;
4554 case S_STATUS:
4555 buf[0] = status->status;
4556 text = buf;
4557 break;
4558
4559 default:
4560 return FALSE;
4561 }
4562
4563 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4564 return TRUE;
4565 }
4566
4567 return FALSE;
4568 }
4569
4570 static struct view_ops status_ops = {
4571 "file",
4572 status_open,
4573 NULL,
4574 status_draw,
4575 status_request,
4576 status_grep,
4577 status_select,
4578 };
4579
4580
4581 static bool
4582 stage_diff_line(FILE *pipe, struct line *line)
4583 {
4584 const char *buf = line->data;
4585 size_t bufsize = strlen(buf);
4586 size_t written = 0;
4587
4588 while (!ferror(pipe) && written < bufsize) {
4589 written += fwrite(buf + written, 1, bufsize - written, pipe);
4590 }
4591
4592 fputc('\n', pipe);
4593
4594 return written == bufsize;
4595 }
4596
4597 static bool
4598 stage_diff_write(FILE *pipe, struct line *line, struct line *end)
4599 {
4600 while (line < end) {
4601 if (!stage_diff_line(pipe, line++))
4602 return FALSE;
4603 if (line->type == LINE_DIFF_CHUNK ||
4604 line->type == LINE_DIFF_HEADER)
4605 break;
4606 }
4607
4608 return TRUE;
4609 }
4610
4611 static struct line *
4612 stage_diff_find(struct view *view, struct line *line, enum line_type type)
4613 {
4614 for (; view->line < line; line--)
4615 if (line->type == type)
4616 return line;
4617
4618 return NULL;
4619 }
4620
4621 static bool
4622 stage_apply_chunk(struct view *view, struct line *chunk, bool revert)
4623 {
4624 char cmd[SIZEOF_STR];
4625 size_t cmdsize = 0;
4626 struct line *diff_hdr;
4627 FILE *pipe;
4628
4629 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
4630 if (!diff_hdr)
4631 return FALSE;
4632
4633 if (opt_cdup[0] &&
4634 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
4635 return FALSE;
4636
4637 if (!string_format_from(cmd, &cmdsize,
4638 "git apply --whitespace=nowarn %s %s - && "
4639 "git update-index -q --unmerged --refresh 2>/dev/null",
4640 revert ? "" : "--cached",
4641 revert || stage_line_type == LINE_STAT_STAGED ? "-R" : ""))
4642 return FALSE;
4643
4644 pipe = popen(cmd, "w");
4645 if (!pipe)
4646 return FALSE;
4647
4648 if (!stage_diff_write(pipe, diff_hdr, chunk) ||
4649 !stage_diff_write(pipe, chunk, view->line + view->lines))
4650 chunk = NULL;
4651
4652 pclose(pipe);
4653
4654 return chunk ? TRUE : FALSE;
4655 }
4656
4657 static bool
4658 stage_update(struct view *view, struct line *line)
4659 {
4660 struct line *chunk = NULL;
4661
4662 if (!is_initial_commit() && stage_line_type != LINE_STAT_UNTRACKED)
4663 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
4664
4665 if (chunk) {
4666 if (!stage_apply_chunk(view, chunk, FALSE)) {
4667 report("Failed to apply chunk");
4668 return FALSE;
4669 }
4670
4671 } else if (!stage_status.status) {
4672 view = VIEW(REQ_VIEW_STATUS);
4673
4674 for (line = view->line; line < view->line + view->lines; line++)
4675 if (line->type == stage_line_type)
4676 break;
4677
4678 if (!status_update_files(view, line + 1)) {
4679 report("Failed to update files");
4680 return FALSE;
4681 }
4682
4683 } else if (!status_update_file(&stage_status, stage_line_type)) {
4684 report("Failed to update file");
4685 return FALSE;
4686 }
4687
4688 return TRUE;
4689 }
4690
4691 static bool
4692 stage_revert(struct view *view, struct line *line)
4693 {
4694 struct line *chunk = NULL;
4695
4696 if (!is_initial_commit() && stage_line_type == LINE_STAT_UNSTAGED)
4697 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
4698
4699 if (chunk) {
4700 if (!prompt_yesno("Are you sure you want to revert changes?"))
4701 return FALSE;
4702
4703 if (!stage_apply_chunk(view, chunk, TRUE)) {
4704 report("Failed to revert chunk");
4705 return FALSE;
4706 }
4707 return TRUE;
4708
4709 } else {
4710 return status_revert(stage_status.status ? &stage_status : NULL,
4711 stage_line_type, FALSE);
4712 }
4713 }
4714
4715
4716 static void
4717 stage_next(struct view *view, struct line *line)
4718 {
4719 int i;
4720
4721 if (!stage_chunks) {
4722 static size_t alloc = 0;
4723 int *tmp;
4724
4725 for (line = view->line; line < view->line + view->lines; line++) {
4726 if (line->type != LINE_DIFF_CHUNK)
4727 continue;
4728
4729 tmp = realloc_items(stage_chunk, &alloc,
4730 stage_chunks, sizeof(*tmp));
4731 if (!tmp) {
4732 report("Allocation failure");
4733 return;
4734 }
4735
4736 stage_chunk = tmp;
4737 stage_chunk[stage_chunks++] = line - view->line;
4738 }
4739 }
4740
4741 for (i = 0; i < stage_chunks; i++) {
4742 if (stage_chunk[i] > view->lineno) {
4743 do_scroll_view(view, stage_chunk[i] - view->lineno);
4744 report("Chunk %d of %d", i + 1, stage_chunks);
4745 return;
4746 }
4747 }
4748
4749 report("No next chunk found");
4750 }
4751
4752 static enum request
4753 stage_request(struct view *view, enum request request, struct line *line)
4754 {
4755 switch (request) {
4756 case REQ_STATUS_UPDATE:
4757 if (!stage_update(view, line))
4758 return REQ_NONE;
4759 break;
4760
4761 case REQ_STATUS_REVERT:
4762 if (!stage_revert(view, line))
4763 return REQ_NONE;
4764 break;
4765
4766 case REQ_STAGE_NEXT:
4767 if (stage_line_type == LINE_STAT_UNTRACKED) {
4768 report("File is untracked; press %s to add",
4769 get_key(REQ_STATUS_UPDATE));
4770 return REQ_NONE;
4771 }
4772 stage_next(view, line);
4773 return REQ_NONE;
4774
4775 case REQ_EDIT:
4776 if (!stage_status.new.name[0])
4777 return request;
4778 if (stage_status.status == 'D') {
4779 report("File has been deleted.");
4780 return REQ_NONE;
4781 }
4782
4783 open_editor(stage_status.status != '?', stage_status.new.name);
4784 break;
4785
4786 case REQ_REFRESH:
4787 /* Reload everything ... */
4788 break;
4789
4790 case REQ_VIEW_BLAME:
4791 if (stage_status.new.name[0]) {
4792 string_copy(opt_file, stage_status.new.name);
4793 opt_ref[0] = 0;
4794 }
4795 return request;
4796
4797 case REQ_ENTER:
4798 return pager_request(view, request, line);
4799
4800 default:
4801 return request;
4802 }
4803
4804 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD | OPEN_NOMAXIMIZE);
4805
4806 /* Check whether the staged entry still exists, and close the
4807 * stage view if it doesn't. */
4808 if (!status_exists(&stage_status, stage_line_type))
4809 return REQ_VIEW_CLOSE;
4810
4811 if (stage_line_type == LINE_STAT_UNTRACKED) {
4812 if (!suffixcmp(stage_status.new.name, -1, "/")) {
4813 report("Cannot display a directory");
4814 return REQ_NONE;
4815 }
4816
4817 opt_pipe = fopen(stage_status.new.name, "r");
4818 }
4819 open_view(view, REQ_VIEW_STAGE, OPEN_REFRESH);
4820
4821 return REQ_NONE;
4822 }
4823
4824 static struct view_ops stage_ops = {
4825 "line",
4826 NULL,
4827 pager_read,
4828 pager_draw,
4829 stage_request,
4830 pager_grep,
4831 pager_select,
4832 };
4833
4834
4835 /*
4836 * Revision graph
4837 */
4838
4839 struct commit {
4840 char id[SIZEOF_REV]; /* SHA1 ID. */
4841 char title[128]; /* First line of the commit message. */
4842 char author[75]; /* Author of the commit. */
4843 struct tm time; /* Date from the author ident. */
4844 struct ref **refs; /* Repository references. */
4845 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
4846 size_t graph_size; /* The width of the graph array. */
4847 bool has_parents; /* Rewritten --parents seen. */
4848 };
4849
4850 /* Size of rev graph with no "padding" columns */
4851 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
4852
4853 struct rev_graph {
4854 struct rev_graph *prev, *next, *parents;
4855 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
4856 size_t size;
4857 struct commit *commit;
4858 size_t pos;
4859 unsigned int boundary:1;
4860 };
4861
4862 /* Parents of the commit being visualized. */
4863 static struct rev_graph graph_parents[4];
4864
4865 /* The current stack of revisions on the graph. */
4866 static struct rev_graph graph_stacks[4] = {
4867 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
4868 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
4869 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
4870 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
4871 };
4872
4873 static inline bool
4874 graph_parent_is_merge(struct rev_graph *graph)
4875 {
4876 return graph->parents->size > 1;
4877 }
4878
4879 static inline void
4880 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
4881 {
4882 struct commit *commit = graph->commit;
4883
4884 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
4885 commit->graph[commit->graph_size++] = symbol;
4886 }
4887
4888 static void
4889 clear_rev_graph(struct rev_graph *graph)
4890 {
4891 graph->boundary = 0;
4892 graph->size = graph->pos = 0;
4893 graph->commit = NULL;
4894 memset(graph->parents, 0, sizeof(*graph->parents));
4895 }
4896
4897 static void
4898 done_rev_graph(struct rev_graph *graph)
4899 {
4900 if (graph_parent_is_merge(graph) &&
4901 graph->pos < graph->size - 1 &&
4902 graph->next->size == graph->size + graph->parents->size - 1) {
4903 size_t i = graph->pos + graph->parents->size - 1;
4904
4905 graph->commit->graph_size = i * 2;
4906 while (i < graph->next->size - 1) {
4907 append_to_rev_graph(graph, ' ');
4908 append_to_rev_graph(graph, '\\');
4909 i++;
4910 }
4911 }
4912
4913 clear_rev_graph(graph);
4914 }
4915
4916 static void
4917 push_rev_graph(struct rev_graph *graph, const char *parent)
4918 {
4919 int i;
4920
4921 /* "Collapse" duplicate parents lines.
4922 *
4923 * FIXME: This needs to also update update the drawn graph but
4924 * for now it just serves as a method for pruning graph lines. */
4925 for (i = 0; i < graph->size; i++)
4926 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
4927 return;
4928
4929 if (graph->size < SIZEOF_REVITEMS) {
4930 string_copy_rev(graph->rev[graph->size++], parent);
4931 }
4932 }
4933
4934 static chtype
4935 get_rev_graph_symbol(struct rev_graph *graph)
4936 {
4937 chtype symbol;
4938
4939 if (graph->boundary)
4940 symbol = REVGRAPH_BOUND;
4941 else if (graph->parents->size == 0)
4942 symbol = REVGRAPH_INIT;
4943 else if (graph_parent_is_merge(graph))
4944 symbol = REVGRAPH_MERGE;
4945 else if (graph->pos >= graph->size)
4946 symbol = REVGRAPH_BRANCH;
4947 else
4948 symbol = REVGRAPH_COMMIT;
4949
4950 return symbol;
4951 }
4952
4953 static void
4954 draw_rev_graph(struct rev_graph *graph)
4955 {
4956 struct rev_filler {
4957 chtype separator, line;
4958 };
4959 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
4960 static struct rev_filler fillers[] = {
4961 { ' ', '|' },
4962 { '`', '.' },
4963 { '\'', ' ' },
4964 { '/', ' ' },
4965 };
4966 chtype symbol = get_rev_graph_symbol(graph);
4967 struct rev_filler *filler;
4968 size_t i;
4969
4970 if (opt_line_graphics)
4971 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
4972
4973 filler = &fillers[DEFAULT];
4974
4975 for (i = 0; i < graph->pos; i++) {
4976 append_to_rev_graph(graph, filler->line);
4977 if (graph_parent_is_merge(graph->prev) &&
4978 graph->prev->pos == i)
4979 filler = &fillers[RSHARP];
4980
4981 append_to_rev_graph(graph, filler->separator);
4982 }
4983
4984 /* Place the symbol for this revision. */
4985 append_to_rev_graph(graph, symbol);
4986
4987 if (graph->prev->size > graph->size)
4988 filler = &fillers[RDIAG];
4989 else
4990 filler = &fillers[DEFAULT];
4991
4992 i++;
4993
4994 for (; i < graph->size; i++) {
4995 append_to_rev_graph(graph, filler->separator);
4996 append_to_rev_graph(graph, filler->line);
4997 if (graph_parent_is_merge(graph->prev) &&
4998 i < graph->prev->pos + graph->parents->size)
4999 filler = &fillers[RSHARP];
5000 if (graph->prev->size > graph->size)
5001 filler = &fillers[LDIAG];
5002 }
5003
5004 if (graph->prev->size > graph->size) {
5005 append_to_rev_graph(graph, filler->separator);
5006 if (filler->line != ' ')
5007 append_to_rev_graph(graph, filler->line);
5008 }
5009 }
5010
5011 /* Prepare the next rev graph */
5012 static void
5013 prepare_rev_graph(struct rev_graph *graph)
5014 {
5015 size_t i;
5016
5017 /* First, traverse all lines of revisions up to the active one. */
5018 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
5019 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
5020 break;
5021
5022 push_rev_graph(graph->next, graph->rev[graph->pos]);
5023 }
5024
5025 /* Interleave the new revision parent(s). */
5026 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
5027 push_rev_graph(graph->next, graph->parents->rev[i]);
5028
5029 /* Lastly, put any remaining revisions. */
5030 for (i = graph->pos + 1; i < graph->size; i++)
5031 push_rev_graph(graph->next, graph->rev[i]);
5032 }
5033
5034 static void
5035 update_rev_graph(struct rev_graph *graph)
5036 {
5037 /* If this is the finalizing update ... */
5038 if (graph->commit)
5039 prepare_rev_graph(graph);
5040
5041 /* Graph visualization needs a one rev look-ahead,
5042 * so the first update doesn't visualize anything. */
5043 if (!graph->prev->commit)
5044 return;
5045
5046 draw_rev_graph(graph->prev);
5047 done_rev_graph(graph->prev->prev);
5048 }
5049
5050
5051 /*
5052 * Main view backend
5053 */
5054
5055 static bool
5056 main_draw(struct view *view, struct line *line, unsigned int lineno)
5057 {
5058 struct commit *commit = line->data;
5059
5060 if (!*commit->author)
5061 return FALSE;
5062
5063 if (opt_date && draw_date(view, &commit->time))
5064 return TRUE;
5065
5066 if (opt_author &&
5067 draw_field(view, LINE_MAIN_AUTHOR, commit->author, opt_author_cols, TRUE))
5068 return TRUE;
5069
5070 if (opt_rev_graph && commit->graph_size &&
5071 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
5072 return TRUE;
5073
5074 if (opt_show_refs && commit->refs) {
5075 size_t i = 0;
5076
5077 do {
5078 enum line_type type;
5079
5080 if (commit->refs[i]->head)
5081 type = LINE_MAIN_HEAD;
5082 else if (commit->refs[i]->ltag)
5083 type = LINE_MAIN_LOCAL_TAG;
5084 else if (commit->refs[i]->tag)
5085 type = LINE_MAIN_TAG;
5086 else if (commit->refs[i]->tracked)
5087 type = LINE_MAIN_TRACKED;
5088 else if (commit->refs[i]->remote)
5089 type = LINE_MAIN_REMOTE;
5090 else
5091 type = LINE_MAIN_REF;
5092
5093 if (draw_text(view, type, "[", TRUE) ||
5094 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5095 draw_text(view, type, "]", TRUE))
5096 return TRUE;
5097
5098 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5099 return TRUE;
5100 } while (commit->refs[i++]->next);
5101 }
5102
5103 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5104 return TRUE;
5105 }
5106
5107 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5108 static bool
5109 main_read(struct view *view, char *line)
5110 {
5111 static struct rev_graph *graph = graph_stacks;
5112 enum line_type type;
5113 struct commit *commit;
5114
5115 if (!line) {
5116 int i;
5117
5118 if (!view->lines && !view->parent)
5119 die("No revisions match the given arguments.");
5120 if (view->lines > 0) {
5121 commit = view->line[view->lines - 1].data;
5122 if (!*commit->author) {
5123 view->lines--;
5124 free(commit);
5125 graph->commit = NULL;
5126 }
5127 }
5128 update_rev_graph(graph);
5129
5130 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5131 clear_rev_graph(&graph_stacks[i]);
5132 return TRUE;
5133 }
5134
5135 type = get_line_type(line);
5136 if (type == LINE_COMMIT) {
5137 commit = calloc(1, sizeof(struct commit));
5138 if (!commit)
5139 return FALSE;
5140
5141 line += STRING_SIZE("commit ");
5142 if (*line == '-') {
5143 graph->boundary = 1;
5144 line++;
5145 }
5146
5147 string_copy_rev(commit->id, line);
5148 commit->refs = get_refs(commit->id);
5149 graph->commit = commit;
5150 add_line_data(view, commit, LINE_MAIN_COMMIT);
5151
5152 while ((line = strchr(line, ' '))) {
5153 line++;
5154 push_rev_graph(graph->parents, line);
5155 commit->has_parents = TRUE;
5156 }
5157 return TRUE;
5158 }
5159
5160 if (!view->lines)
5161 return TRUE;
5162 commit = view->line[view->lines - 1].data;
5163
5164 switch (type) {
5165 case LINE_PARENT:
5166 if (commit->has_parents)
5167 break;
5168 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5169 break;
5170
5171 case LINE_AUTHOR:
5172 {
5173 /* Parse author lines where the name may be empty:
5174 * author <email@address.tld> 1138474660 +0100
5175 */
5176 char *ident = line + STRING_SIZE("author ");
5177 char *nameend = strchr(ident, '<');
5178 char *emailend = strchr(ident, '>');
5179
5180 if (!nameend || !emailend)
5181 break;
5182
5183 update_rev_graph(graph);
5184 graph = graph->next;
5185
5186 *nameend = *emailend = 0;
5187 ident = chomp_string(ident);
5188 if (!*ident) {
5189 ident = chomp_string(nameend + 1);
5190 if (!*ident)
5191 ident = "Unknown";
5192 }
5193
5194 string_ncopy(commit->author, ident, strlen(ident));
5195
5196 /* Parse epoch and timezone */
5197 if (emailend[1] == ' ') {
5198 char *secs = emailend + 2;
5199 char *zone = strchr(secs, ' ');
5200 time_t time = (time_t) atol(secs);
5201
5202 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
5203 long tz;
5204
5205 zone++;
5206 tz = ('0' - zone[1]) * 60 * 60 * 10;
5207 tz += ('0' - zone[2]) * 60 * 60;
5208 tz += ('0' - zone[3]) * 60;
5209 tz += ('0' - zone[4]) * 60;
5210
5211 if (zone[0] == '-')
5212 tz = -tz;
5213
5214 time -= tz;
5215 }
5216
5217 gmtime_r(&time, &commit->time);
5218 }
5219 break;
5220 }
5221 default:
5222 /* Fill in the commit title if it has not already been set. */
5223 if (commit->title[0])
5224 break;
5225
5226 /* Require titles to start with a non-space character at the
5227 * offset used by git log. */
5228 if (strncmp(line, " ", 4))
5229 break;
5230 line += 4;
5231 /* Well, if the title starts with a whitespace character,
5232 * try to be forgiving. Otherwise we end up with no title. */
5233 while (isspace(*line))
5234 line++;
5235 if (*line == '\0')
5236 break;
5237 /* FIXME: More graceful handling of titles; append "..." to
5238 * shortened titles, etc. */
5239
5240 string_ncopy(commit->title, line, strlen(line));
5241 }
5242
5243 return TRUE;
5244 }
5245
5246 static enum request
5247 main_request(struct view *view, enum request request, struct line *line)
5248 {
5249 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5250
5251 switch (request) {
5252 case REQ_ENTER:
5253 open_view(view, REQ_VIEW_DIFF, flags);
5254 break;
5255 case REQ_REFRESH:
5256 load_refs();
5257 open_view(view, REQ_VIEW_MAIN, OPEN_REFRESH);
5258 break;
5259 default:
5260 return request;
5261 }
5262
5263 return REQ_NONE;
5264 }
5265
5266 static bool
5267 grep_refs(struct ref **refs, regex_t *regex)
5268 {
5269 regmatch_t pmatch;
5270 size_t i = 0;
5271
5272 if (!refs)
5273 return FALSE;
5274 do {
5275 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5276 return TRUE;
5277 } while (refs[i++]->next);
5278
5279 return FALSE;
5280 }
5281
5282 static bool
5283 main_grep(struct view *view, struct line *line)
5284 {
5285 struct commit *commit = line->data;
5286 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5287 char buf[DATE_COLS + 1];
5288 regmatch_t pmatch;
5289
5290 for (state = S_TITLE; state < S_END; state++) {
5291 char *text;
5292
5293 switch (state) {
5294 case S_TITLE: text = commit->title; break;
5295 case S_AUTHOR:
5296 if (!opt_author)
5297 continue;
5298 text = commit->author;
5299 break;
5300 case S_DATE:
5301 if (!opt_date)
5302 continue;
5303 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5304 continue;
5305 text = buf;
5306 break;
5307 case S_REFS:
5308 if (!opt_show_refs)
5309 continue;
5310 if (grep_refs(commit->refs, view->regex) == TRUE)
5311 return TRUE;
5312 continue;
5313 default:
5314 return FALSE;
5315 }
5316
5317 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5318 return TRUE;
5319 }
5320
5321 return FALSE;
5322 }
5323
5324 static void
5325 main_select(struct view *view, struct line *line)
5326 {
5327 struct commit *commit = line->data;
5328
5329 string_copy_rev(view->ref, commit->id);
5330 string_copy_rev(ref_commit, view->ref);
5331 }
5332
5333 static struct view_ops main_ops = {
5334 "commit",
5335 NULL,
5336 main_read,
5337 main_draw,
5338 main_request,
5339 main_grep,
5340 main_select,
5341 };
5342
5343
5344 /*
5345 * Unicode / UTF-8 handling
5346 *
5347 * NOTE: Much of the following code for dealing with unicode is derived from
5348 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
5349 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
5350 */
5351
5352 /* I've (over)annotated a lot of code snippets because I am not entirely
5353 * confident that the approach taken by this small UTF-8 interface is correct.
5354 * --jonas */
5355
5356 static inline int
5357 unicode_width(unsigned long c)
5358 {
5359 if (c >= 0x1100 &&
5360 (c <= 0x115f /* Hangul Jamo */
5361 || c == 0x2329
5362 || c == 0x232a
5363 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
5364 /* CJK ... Yi */
5365 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
5366 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
5367 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
5368 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
5369 || (c >= 0xffe0 && c <= 0xffe6)
5370 || (c >= 0x20000 && c <= 0x2fffd)
5371 || (c >= 0x30000 && c <= 0x3fffd)))
5372 return 2;
5373
5374 if (c == '\t')
5375 return opt_tab_size;
5376
5377 return 1;
5378 }
5379
5380 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
5381 * Illegal bytes are set one. */
5382 static const unsigned char utf8_bytes[256] = {
5383 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,
5384 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,
5385 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,
5386 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,
5387 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,
5388 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,
5389 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,
5390 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,
5391 };
5392
5393 /* Decode UTF-8 multi-byte representation into a unicode character. */
5394 static inline unsigned long
5395 utf8_to_unicode(const char *string, size_t length)
5396 {
5397 unsigned long unicode;
5398
5399 switch (length) {
5400 case 1:
5401 unicode = string[0];
5402 break;
5403 case 2:
5404 unicode = (string[0] & 0x1f) << 6;
5405 unicode += (string[1] & 0x3f);
5406 break;
5407 case 3:
5408 unicode = (string[0] & 0x0f) << 12;
5409 unicode += ((string[1] & 0x3f) << 6);
5410 unicode += (string[2] & 0x3f);
5411 break;
5412 case 4:
5413 unicode = (string[0] & 0x0f) << 18;
5414 unicode += ((string[1] & 0x3f) << 12);
5415 unicode += ((string[2] & 0x3f) << 6);
5416 unicode += (string[3] & 0x3f);
5417 break;
5418 case 5:
5419 unicode = (string[0] & 0x0f) << 24;
5420 unicode += ((string[1] & 0x3f) << 18);
5421 unicode += ((string[2] & 0x3f) << 12);
5422 unicode += ((string[3] & 0x3f) << 6);
5423 unicode += (string[4] & 0x3f);
5424 break;
5425 case 6:
5426 unicode = (string[0] & 0x01) << 30;
5427 unicode += ((string[1] & 0x3f) << 24);
5428 unicode += ((string[2] & 0x3f) << 18);
5429 unicode += ((string[3] & 0x3f) << 12);
5430 unicode += ((string[4] & 0x3f) << 6);
5431 unicode += (string[5] & 0x3f);
5432 break;
5433 default:
5434 die("Invalid unicode length");
5435 }
5436
5437 /* Invalid characters could return the special 0xfffd value but NUL
5438 * should be just as good. */
5439 return unicode > 0xffff ? 0 : unicode;
5440 }
5441
5442 /* Calculates how much of string can be shown within the given maximum width
5443 * and sets trimmed parameter to non-zero value if all of string could not be
5444 * shown. If the reserve flag is TRUE, it will reserve at least one
5445 * trailing character, which can be useful when drawing a delimiter.
5446 *
5447 * Returns the number of bytes to output from string to satisfy max_width. */
5448 static size_t
5449 utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve)
5450 {
5451 const char *start = string;
5452 const char *end = strchr(string, '\0');
5453 unsigned char last_bytes = 0;
5454 size_t last_ucwidth = 0;
5455
5456 *width = 0;
5457 *trimmed = 0;
5458
5459 while (string < end) {
5460 int c = *(unsigned char *) string;
5461 unsigned char bytes = utf8_bytes[c];
5462 size_t ucwidth;
5463 unsigned long unicode;
5464
5465 if (string + bytes > end)
5466 break;
5467
5468 /* Change representation to figure out whether
5469 * it is a single- or double-width character. */
5470
5471 unicode = utf8_to_unicode(string, bytes);
5472 /* FIXME: Graceful handling of invalid unicode character. */
5473 if (!unicode)
5474 break;
5475
5476 ucwidth = unicode_width(unicode);
5477 *width += ucwidth;
5478 if (*width > max_width) {
5479 *trimmed = 1;
5480 *width -= ucwidth;
5481 if (reserve && *width == max_width) {
5482 string -= last_bytes;
5483 *width -= last_ucwidth;
5484 }
5485 break;
5486 }
5487
5488 string += bytes;
5489 last_bytes = bytes;
5490 last_ucwidth = ucwidth;
5491 }
5492
5493 return string - start;
5494 }
5495
5496
5497 /*
5498 * Status management
5499 */
5500
5501 /* Whether or not the curses interface has been initialized. */
5502 static bool cursed = FALSE;
5503
5504 /* The status window is used for polling keystrokes. */
5505 static WINDOW *status_win;
5506
5507 static bool status_empty = TRUE;
5508
5509 /* Update status and title window. */
5510 static void
5511 report(const char *msg, ...)
5512 {
5513 struct view *view = display[current_view];
5514
5515 if (input_mode)
5516 return;
5517
5518 if (!view) {
5519 char buf[SIZEOF_STR];
5520 va_list args;
5521
5522 va_start(args, msg);
5523 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
5524 buf[sizeof(buf) - 1] = 0;
5525 buf[sizeof(buf) - 2] = '.';
5526 buf[sizeof(buf) - 3] = '.';
5527 buf[sizeof(buf) - 4] = '.';
5528 }
5529 va_end(args);
5530 die("%s", buf);
5531 }
5532
5533 if (!status_empty || *msg) {
5534 va_list args;
5535
5536 va_start(args, msg);
5537
5538 wmove(status_win, 0, 0);
5539 if (*msg) {
5540 vwprintw(status_win, msg, args);
5541 status_empty = FALSE;
5542 } else {
5543 status_empty = TRUE;
5544 }
5545 wclrtoeol(status_win);
5546 wrefresh(status_win);
5547
5548 va_end(args);
5549 }
5550
5551 update_view_title(view);
5552 update_display_cursor(view);
5553 }
5554
5555 /* Controls when nodelay should be in effect when polling user input. */
5556 static void
5557 set_nonblocking_input(bool loading)
5558 {
5559 static unsigned int loading_views;
5560
5561 if ((loading == FALSE && loading_views-- == 1) ||
5562 (loading == TRUE && loading_views++ == 0))
5563 nodelay(status_win, loading);
5564 }
5565
5566 static void
5567 init_display(void)
5568 {
5569 int x, y;
5570
5571 /* Initialize the curses library */
5572 if (isatty(STDIN_FILENO)) {
5573 cursed = !!initscr();
5574 opt_tty = stdin;
5575 } else {
5576 /* Leave stdin and stdout alone when acting as a pager. */
5577 opt_tty = fopen("/dev/tty", "r+");
5578 if (!opt_tty)
5579 die("Failed to open /dev/tty");
5580 cursed = !!newterm(NULL, opt_tty, opt_tty);
5581 }
5582
5583 if (!cursed)
5584 die("Failed to initialize curses");
5585
5586 nonl(); /* Tell curses not to do NL->CR/NL on output */
5587 cbreak(); /* Take input chars one at a time, no wait for \n */
5588 noecho(); /* Don't echo input */
5589 leaveok(stdscr, TRUE);
5590
5591 if (has_colors())
5592 init_colors();
5593
5594 getmaxyx(stdscr, y, x);
5595 status_win = newwin(1, 0, y - 1, 0);
5596 if (!status_win)
5597 die("Failed to create status window");
5598
5599 /* Enable keyboard mapping */
5600 keypad(status_win, TRUE);
5601 wbkgdset(status_win, get_line_attr(LINE_STATUS));
5602
5603 TABSIZE = opt_tab_size;
5604 if (opt_line_graphics) {
5605 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
5606 }
5607 }
5608
5609 static bool
5610 prompt_yesno(const char *prompt)
5611 {
5612 enum { WAIT, STOP, CANCEL } status = WAIT;
5613 bool answer = FALSE;
5614
5615 while (status == WAIT) {
5616 struct view *view;
5617 int i, key;
5618
5619 input_mode = TRUE;
5620
5621 foreach_view (view, i)
5622 update_view(view);
5623
5624 input_mode = FALSE;
5625
5626 mvwprintw(status_win, 0, 0, "%s [Yy]/[Nn]", prompt);
5627 wclrtoeol(status_win);
5628
5629 /* Refresh, accept single keystroke of input */
5630 key = wgetch(status_win);
5631 switch (key) {
5632 case ERR:
5633 break;
5634
5635 case 'y':
5636 case 'Y':
5637 answer = TRUE;
5638 status = STOP;
5639 break;
5640
5641 case KEY_ESC:
5642 case KEY_RETURN:
5643 case KEY_ENTER:
5644 case KEY_BACKSPACE:
5645 case 'n':
5646 case 'N':
5647 case '\n':
5648 default:
5649 answer = FALSE;
5650 status = CANCEL;
5651 }
5652 }
5653
5654 /* Clear the status window */
5655 status_empty = FALSE;
5656 report("");
5657
5658 return answer;
5659 }
5660
5661 static char *
5662 read_prompt(const char *prompt)
5663 {
5664 enum { READING, STOP, CANCEL } status = READING;
5665 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
5666 int pos = 0;
5667
5668 while (status == READING) {
5669 struct view *view;
5670 int i, key;
5671
5672 input_mode = TRUE;
5673
5674 foreach_view (view, i)
5675 update_view(view);
5676
5677 input_mode = FALSE;
5678
5679 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
5680 wclrtoeol(status_win);
5681
5682 /* Refresh, accept single keystroke of input */
5683 key = wgetch(status_win);
5684 switch (key) {
5685 case KEY_RETURN:
5686 case KEY_ENTER:
5687 case '\n':
5688 status = pos ? STOP : CANCEL;
5689 break;
5690
5691 case KEY_BACKSPACE:
5692 if (pos > 0)
5693 pos--;
5694 else
5695 status = CANCEL;
5696 break;
5697
5698 case KEY_ESC:
5699 status = CANCEL;
5700 break;
5701
5702 case ERR:
5703 break;
5704
5705 default:
5706 if (pos >= sizeof(buf)) {
5707 report("Input string too long");
5708 return NULL;
5709 }
5710
5711 if (isprint(key))
5712 buf[pos++] = (char) key;
5713 }
5714 }
5715
5716 /* Clear the status window */
5717 status_empty = FALSE;
5718 report("");
5719
5720 if (status == CANCEL)
5721 return NULL;
5722
5723 buf[pos++] = 0;
5724
5725 return buf;
5726 }
5727
5728 /*
5729 * Repository references
5730 */
5731
5732 static struct ref *refs = NULL;
5733 static size_t refs_alloc = 0;
5734 static size_t refs_size = 0;
5735
5736 /* Id <-> ref store */
5737 static struct ref ***id_refs = NULL;
5738 static size_t id_refs_alloc = 0;
5739 static size_t id_refs_size = 0;
5740
5741 static int
5742 compare_refs(const void *ref1_, const void *ref2_)
5743 {
5744 const struct ref *ref1 = *(const struct ref **)ref1_;
5745 const struct ref *ref2 = *(const struct ref **)ref2_;
5746
5747 if (ref1->tag != ref2->tag)
5748 return ref2->tag - ref1->tag;
5749 if (ref1->ltag != ref2->ltag)
5750 return ref2->ltag - ref2->ltag;
5751 if (ref1->head != ref2->head)
5752 return ref2->head - ref1->head;
5753 if (ref1->tracked != ref2->tracked)
5754 return ref2->tracked - ref1->tracked;
5755 if (ref1->remote != ref2->remote)
5756 return ref2->remote - ref1->remote;
5757 return strcmp(ref1->name, ref2->name);
5758 }
5759
5760 static struct ref **
5761 get_refs(const char *id)
5762 {
5763 struct ref ***tmp_id_refs;
5764 struct ref **ref_list = NULL;
5765 size_t ref_list_alloc = 0;
5766 size_t ref_list_size = 0;
5767 size_t i;
5768
5769 for (i = 0; i < id_refs_size; i++)
5770 if (!strcmp(id, id_refs[i][0]->id))
5771 return id_refs[i];
5772
5773 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
5774 sizeof(*id_refs));
5775 if (!tmp_id_refs)
5776 return NULL;
5777
5778 id_refs = tmp_id_refs;
5779
5780 for (i = 0; i < refs_size; i++) {
5781 struct ref **tmp;
5782
5783 if (strcmp(id, refs[i].id))
5784 continue;
5785
5786 tmp = realloc_items(ref_list, &ref_list_alloc,
5787 ref_list_size + 1, sizeof(*ref_list));
5788 if (!tmp) {
5789 if (ref_list)
5790 free(ref_list);
5791 return NULL;
5792 }
5793
5794 ref_list = tmp;
5795 ref_list[ref_list_size] = &refs[i];
5796 /* XXX: The properties of the commit chains ensures that we can
5797 * safely modify the shared ref. The repo references will
5798 * always be similar for the same id. */
5799 ref_list[ref_list_size]->next = 1;
5800
5801 ref_list_size++;
5802 }
5803
5804 if (ref_list) {
5805 qsort(ref_list, ref_list_size, sizeof(*ref_list), compare_refs);
5806 ref_list[ref_list_size - 1]->next = 0;
5807 id_refs[id_refs_size++] = ref_list;
5808 }
5809
5810 return ref_list;
5811 }
5812
5813 static int
5814 read_ref(char *id, size_t idlen, char *name, size_t namelen)
5815 {
5816 struct ref *ref;
5817 bool tag = FALSE;
5818 bool ltag = FALSE;
5819 bool remote = FALSE;
5820 bool tracked = FALSE;
5821 bool check_replace = FALSE;
5822 bool head = FALSE;
5823
5824 if (!prefixcmp(name, "refs/tags/")) {
5825 if (!suffixcmp(name, namelen, "^{}")) {
5826 namelen -= 3;
5827 name[namelen] = 0;
5828 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
5829 check_replace = TRUE;
5830 } else {
5831 ltag = TRUE;
5832 }
5833
5834 tag = TRUE;
5835 namelen -= STRING_SIZE("refs/tags/");
5836 name += STRING_SIZE("refs/tags/");
5837
5838 } else if (!prefixcmp(name, "refs/remotes/")) {
5839 remote = TRUE;
5840 namelen -= STRING_SIZE("refs/remotes/");
5841 name += STRING_SIZE("refs/remotes/");
5842 tracked = !strcmp(opt_remote, name);
5843
5844 } else if (!prefixcmp(name, "refs/heads/")) {
5845 namelen -= STRING_SIZE("refs/heads/");
5846 name += STRING_SIZE("refs/heads/");
5847 head = !strncmp(opt_head, name, namelen);
5848
5849 } else if (!strcmp(name, "HEAD")) {
5850 string_ncopy(opt_head_rev, id, idlen);
5851 return OK;
5852 }
5853
5854 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
5855 /* it's an annotated tag, replace the previous sha1 with the
5856 * resolved commit id; relies on the fact git-ls-remote lists
5857 * the commit id of an annotated tag right before the commit id
5858 * it points to. */
5859 refs[refs_size - 1].ltag = ltag;
5860 string_copy_rev(refs[refs_size - 1].id, id);
5861
5862 return OK;
5863 }
5864 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
5865 if (!refs)
5866 return ERR;
5867
5868 ref = &refs[refs_size++];
5869 ref->name = malloc(namelen + 1);
5870 if (!ref->name)
5871 return ERR;
5872
5873 strncpy(ref->name, name, namelen);
5874 ref->name[namelen] = 0;
5875 ref->head = head;
5876 ref->tag = tag;
5877 ref->ltag = ltag;
5878 ref->remote = remote;
5879 ref->tracked = tracked;
5880 string_copy_rev(ref->id, id);
5881
5882 return OK;
5883 }
5884
5885 static int
5886 load_refs(void)
5887 {
5888 const char *cmd_env = getenv("TIG_LS_REMOTE");
5889 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
5890
5891 if (!*opt_git_dir)
5892 return OK;
5893
5894 while (refs_size > 0)
5895 free(refs[--refs_size].name);
5896 while (id_refs_size > 0)
5897 free(id_refs[--id_refs_size]);
5898
5899 return read_properties(popen(cmd, "r"), "\t", read_ref);
5900 }
5901
5902 static int
5903 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
5904 {
5905 if (!strcmp(name, "i18n.commitencoding"))
5906 string_ncopy(opt_encoding, value, valuelen);
5907
5908 if (!strcmp(name, "core.editor"))
5909 string_ncopy(opt_editor, value, valuelen);
5910
5911 /* branch.<head>.remote */
5912 if (*opt_head &&
5913 !strncmp(name, "branch.", 7) &&
5914 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
5915 !strcmp(name + 7 + strlen(opt_head), ".remote"))
5916 string_ncopy(opt_remote, value, valuelen);
5917
5918 if (*opt_head && *opt_remote &&
5919 !strncmp(name, "branch.", 7) &&
5920 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
5921 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
5922 size_t from = strlen(opt_remote);
5923
5924 if (!prefixcmp(value, "refs/heads/")) {
5925 value += STRING_SIZE("refs/heads/");
5926 valuelen -= STRING_SIZE("refs/heads/");
5927 }
5928
5929 if (!string_format_from(opt_remote, &from, "/%s", value))
5930 opt_remote[0] = 0;
5931 }
5932
5933 return OK;
5934 }
5935
5936 static int
5937 load_git_config(void)
5938 {
5939 return read_properties(popen("git " GIT_CONFIG " --list", "r"),
5940 "=", read_repo_config_option);
5941 }
5942
5943 static int
5944 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
5945 {
5946 if (!opt_git_dir[0]) {
5947 string_ncopy(opt_git_dir, name, namelen);
5948
5949 } else if (opt_is_inside_work_tree == -1) {
5950 /* This can be 3 different values depending on the
5951 * version of git being used. If git-rev-parse does not
5952 * understand --is-inside-work-tree it will simply echo
5953 * the option else either "true" or "false" is printed.
5954 * Default to true for the unknown case. */
5955 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
5956
5957 } else if (opt_cdup[0] == ' ') {
5958 string_ncopy(opt_cdup, name, namelen);
5959 } else {
5960 if (!prefixcmp(name, "refs/heads/")) {
5961 namelen -= STRING_SIZE("refs/heads/");
5962 name += STRING_SIZE("refs/heads/");
5963 string_ncopy(opt_head, name, namelen);
5964 }
5965 }
5966
5967 return OK;
5968 }
5969
5970 static int
5971 load_repo_info(void)
5972 {
5973 int result;
5974 FILE *pipe = popen("(git rev-parse --git-dir --is-inside-work-tree "
5975 " --show-cdup; git symbolic-ref HEAD) 2>/dev/null", "r");
5976
5977 /* XXX: The line outputted by "--show-cdup" can be empty so
5978 * initialize it to something invalid to make it possible to
5979 * detect whether it has been set or not. */
5980 opt_cdup[0] = ' ';
5981
5982 result = read_properties(pipe, "=", read_repo_info);
5983 if (opt_cdup[0] == ' ')
5984 opt_cdup[0] = 0;
5985
5986 return result;
5987 }
5988
5989 static int
5990 read_properties(FILE *pipe, const char *separators,
5991 int (*read_property)(char *, size_t, char *, size_t))
5992 {
5993 char buffer[BUFSIZ];
5994 char *name;
5995 int state = OK;
5996
5997 if (!pipe)
5998 return ERR;
5999
6000 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
6001 char *value;
6002 size_t namelen;
6003 size_t valuelen;
6004
6005 name = chomp_string(name);
6006 namelen = strcspn(name, separators);
6007
6008 if (name[namelen]) {
6009 name[namelen] = 0;
6010 value = chomp_string(name + namelen + 1);
6011 valuelen = strlen(value);
6012
6013 } else {
6014 value = "";
6015 valuelen = 0;
6016 }
6017
6018 state = read_property(name, namelen, value, valuelen);
6019 }
6020
6021 if (state != ERR && ferror(pipe))
6022 state = ERR;
6023
6024 pclose(pipe);
6025
6026 return state;
6027 }
6028
6029
6030 /*
6031 * Main
6032 */
6033
6034 static void __NORETURN
6035 quit(int sig)
6036 {
6037 /* XXX: Restore tty modes and let the OS cleanup the rest! */
6038 if (cursed)
6039 endwin();
6040 exit(0);
6041 }
6042
6043 static void __NORETURN
6044 die(const char *err, ...)
6045 {
6046 va_list args;
6047
6048 endwin();
6049
6050 va_start(args, err);
6051 fputs("tig: ", stderr);
6052 vfprintf(stderr, err, args);
6053 fputs("\n", stderr);
6054 va_end(args);
6055
6056 exit(1);
6057 }
6058
6059 static void
6060 warn(const char *msg, ...)
6061 {
6062 va_list args;
6063
6064 va_start(args, msg);
6065 fputs("tig warning: ", stderr);
6066 vfprintf(stderr, msg, args);
6067 fputs("\n", stderr);
6068 va_end(args);
6069 }
6070
6071 int
6072 main(int argc, const char *argv[])
6073 {
6074 struct view *view;
6075 enum request request;
6076 size_t i;
6077
6078 signal(SIGINT, quit);
6079
6080 if (setlocale(LC_ALL, "")) {
6081 char *codeset = nl_langinfo(CODESET);
6082
6083 string_ncopy(opt_codeset, codeset, strlen(codeset));
6084 }
6085
6086 if (load_repo_info() == ERR)
6087 die("Failed to load repo info.");
6088
6089 if (load_options() == ERR)
6090 die("Failed to load user config.");
6091
6092 if (load_git_config() == ERR)
6093 die("Failed to load repo config.");
6094
6095 request = parse_options(argc, argv);
6096 if (request == REQ_NONE)
6097 return 0;
6098
6099 /* Require a git repository unless when running in pager mode. */
6100 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
6101 die("Not a git repository");
6102
6103 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
6104 opt_utf8 = FALSE;
6105
6106 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
6107 opt_iconv = iconv_open(opt_codeset, opt_encoding);
6108 if (opt_iconv == ICONV_NONE)
6109 die("Failed to initialize character set conversion");
6110 }
6111
6112 if (load_refs() == ERR)
6113 die("Failed to load refs.");
6114
6115 foreach_view (view, i)
6116 view->cmd_env = getenv(view->cmd_env);
6117
6118 init_display();
6119
6120 while (view_driver(display[current_view], request)) {
6121 int key;
6122 int i;
6123
6124 foreach_view (view, i)
6125 update_view(view);
6126 view = display[current_view];
6127
6128 /* Refresh, accept single keystroke of input */
6129 key = wgetch(status_win);
6130
6131 /* wgetch() with nodelay() enabled returns ERR when there's no
6132 * input. */
6133 if (key == ERR) {
6134 request = REQ_NONE;
6135 continue;
6136 }
6137
6138 request = get_keybinding(view->keymap, key);
6139
6140 /* Some low-level request handling. This keeps access to
6141 * status_win restricted. */
6142 switch (request) {
6143 case REQ_PROMPT:
6144 {
6145 char *cmd = read_prompt(":");
6146
6147 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
6148 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
6149 request = REQ_VIEW_DIFF;
6150 } else {
6151 request = REQ_VIEW_PAGER;
6152 }
6153
6154 /* Always reload^Wrerun commands from the prompt. */
6155 open_view(view, request, OPEN_RELOAD);
6156 }
6157
6158 request = REQ_NONE;
6159 break;
6160 }
6161 case REQ_SEARCH:
6162 case REQ_SEARCH_BACK:
6163 {
6164 const char *prompt = request == REQ_SEARCH ? "/" : "?";
6165 char *search = read_prompt(prompt);
6166
6167 if (search)
6168 string_ncopy(opt_search, search, strlen(search));
6169 else
6170 request = REQ_NONE;
6171 break;
6172 }
6173 case REQ_SCREEN_RESIZE:
6174 {
6175 int height, width;
6176
6177 getmaxyx(stdscr, height, width);
6178
6179 /* Resize the status view and let the view driver take
6180 * care of resizing the displayed views. */
6181 wresize(status_win, 1, width);
6182 mvwin(status_win, height - 1, 0);
6183 wrefresh(status_win);
6184 break;
6185 }
6186 default:
6187 break;
6188 }
6189 }
6190
6191 quit(0);
6192
6193 return 0;
6194 }
Text-mode interface for git