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