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Add support for preparing the initial commit in the status view
[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(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 void
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;
4212 }
4213
4214 } else if (!status_update_file(view, line->data, line->type)) {
4215 report("Failed to update file status");
4216 }
4217 }
4218
4219 static enum request
4220 status_request(struct view *view, enum request request, struct line *line)
4221 {
4222 struct status *status = line->data;
4223
4224 switch (request) {
4225 case REQ_STATUS_UPDATE:
4226 status_update(view);
4227 break;
4228
4229 case REQ_STATUS_MERGE:
4230 if (!status || status->status != 'U') {
4231 report("Merging only possible for files with unmerged status ('U').");
4232 return REQ_NONE;
4233 }
4234 open_mergetool(status->new.name);
4235 break;
4236
4237 case REQ_EDIT:
4238 if (!status)
4239 return request;
4240
4241 open_editor(status->status != '?', status->new.name);
4242 break;
4243
4244 case REQ_VIEW_BLAME:
4245 if (status) {
4246 string_copy(opt_file, status->new.name);
4247 opt_ref[0] = 0;
4248 }
4249 return request;
4250
4251 case REQ_ENTER:
4252 /* After returning the status view has been split to
4253 * show the stage view. No further reloading is
4254 * necessary. */
4255 status_enter(view, line);
4256 return REQ_NONE;
4257
4258 case REQ_REFRESH:
4259 /* Simply reload the view. */
4260 break;
4261
4262 default:
4263 return request;
4264 }
4265
4266 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
4267
4268 return REQ_NONE;
4269 }
4270
4271 static void
4272 status_select(struct view *view, struct line *line)
4273 {
4274 struct status *status = line->data;
4275 char file[SIZEOF_STR] = "all files";
4276 char *text;
4277 char *key;
4278
4279 if (status && !string_format(file, "'%s'", status->new.name))
4280 return;
4281
4282 if (!status && line[1].type == LINE_STAT_NONE)
4283 line++;
4284
4285 switch (line->type) {
4286 case LINE_STAT_STAGED:
4287 text = "Press %s to unstage %s for commit";
4288 break;
4289
4290 case LINE_STAT_UNSTAGED:
4291 text = "Press %s to stage %s for commit";
4292 break;
4293
4294 case LINE_STAT_UNTRACKED:
4295 text = "Press %s to stage %s for addition";
4296 break;
4297
4298 case LINE_STAT_HEAD:
4299 case LINE_STAT_NONE:
4300 text = "Nothing to update";
4301 break;
4302
4303 default:
4304 die("line type %d not handled in switch", line->type);
4305 }
4306
4307 if (status && status->status == 'U') {
4308 text = "Press %s to resolve conflict in %s";
4309 key = get_key(REQ_STATUS_MERGE);
4310
4311 } else {
4312 key = get_key(REQ_STATUS_UPDATE);
4313 }
4314
4315 string_format(view->ref, text, key, file);
4316 }
4317
4318 static bool
4319 status_grep(struct view *view, struct line *line)
4320 {
4321 struct status *status = line->data;
4322 enum { S_STATUS, S_NAME, S_END } state;
4323 char buf[2] = "?";
4324 regmatch_t pmatch;
4325
4326 if (!status)
4327 return FALSE;
4328
4329 for (state = S_STATUS; state < S_END; state++) {
4330 char *text;
4331
4332 switch (state) {
4333 case S_NAME: text = status->new.name; break;
4334 case S_STATUS:
4335 buf[0] = status->status;
4336 text = buf;
4337 break;
4338
4339 default:
4340 return FALSE;
4341 }
4342
4343 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4344 return TRUE;
4345 }
4346
4347 return FALSE;
4348 }
4349
4350 static struct view_ops status_ops = {
4351 "file",
4352 status_open,
4353 NULL,
4354 status_draw,
4355 status_request,
4356 status_grep,
4357 status_select,
4358 };
4359
4360
4361 static bool
4362 stage_diff_line(FILE *pipe, struct line *line)
4363 {
4364 char *buf = line->data;
4365 size_t bufsize = strlen(buf);
4366 size_t written = 0;
4367
4368 while (!ferror(pipe) && written < bufsize) {
4369 written += fwrite(buf + written, 1, bufsize - written, pipe);
4370 }
4371
4372 fputc('\n', pipe);
4373
4374 return written == bufsize;
4375 }
4376
4377 static struct line *
4378 stage_diff_hdr(struct view *view, struct line *line)
4379 {
4380 int diff_hdr_dir = line->type == LINE_DIFF_CHUNK ? -1 : 1;
4381 struct line *diff_hdr;
4382
4383 if (line->type == LINE_DIFF_CHUNK)
4384 diff_hdr = line - 1;
4385 else
4386 diff_hdr = view->line + 1;
4387
4388 while (diff_hdr > view->line && diff_hdr < view->line + view->lines) {
4389 if (diff_hdr->type == LINE_DIFF_HEADER)
4390 return diff_hdr;
4391
4392 diff_hdr += diff_hdr_dir;
4393 }
4394
4395 return NULL;
4396 }
4397
4398 static bool
4399 stage_update_chunk(struct view *view, struct line *line)
4400 {
4401 char cmd[SIZEOF_STR];
4402 size_t cmdsize = 0;
4403 struct line *diff_hdr, *diff_chunk, *diff_end;
4404 FILE *pipe;
4405
4406 diff_hdr = stage_diff_hdr(view, line);
4407 if (!diff_hdr)
4408 return FALSE;
4409
4410 if (opt_cdup[0] &&
4411 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
4412 return FALSE;
4413
4414 if (!string_format_from(cmd, &cmdsize,
4415 "git apply --cached %s - && "
4416 "git update-index -q --unmerged --refresh 2>/dev/null",
4417 stage_line_type == LINE_STAT_STAGED ? "-R" : ""))
4418 return FALSE;
4419
4420 pipe = popen(cmd, "w");
4421 if (!pipe)
4422 return FALSE;
4423
4424 diff_end = view->line + view->lines;
4425 if (line->type != LINE_DIFF_CHUNK) {
4426 diff_chunk = diff_hdr;
4427
4428 } else {
4429 for (diff_chunk = line + 1; diff_chunk < diff_end; diff_chunk++)
4430 if (diff_chunk->type == LINE_DIFF_CHUNK ||
4431 diff_chunk->type == LINE_DIFF_HEADER)
4432 diff_end = diff_chunk;
4433
4434 diff_chunk = line;
4435
4436 while (diff_hdr->type != LINE_DIFF_CHUNK) {
4437 switch (diff_hdr->type) {
4438 case LINE_DIFF_HEADER:
4439 case LINE_DIFF_INDEX:
4440 case LINE_DIFF_ADD:
4441 case LINE_DIFF_DEL:
4442 break;
4443
4444 default:
4445 diff_hdr++;
4446 continue;
4447 }
4448
4449 if (!stage_diff_line(pipe, diff_hdr++)) {
4450 pclose(pipe);
4451 return FALSE;
4452 }
4453 }
4454 }
4455
4456 while (diff_chunk < diff_end && stage_diff_line(pipe, diff_chunk))
4457 diff_chunk++;
4458
4459 pclose(pipe);
4460
4461 if (diff_chunk != diff_end)
4462 return FALSE;
4463
4464 return TRUE;
4465 }
4466
4467 static void
4468 stage_update(struct view *view, struct line *line)
4469 {
4470 if (!opt_no_head && stage_line_type != LINE_STAT_UNTRACKED &&
4471 (line->type == LINE_DIFF_CHUNK || !stage_status.status)) {
4472 if (!stage_update_chunk(view, line)) {
4473 report("Failed to apply chunk");
4474 return;
4475 }
4476
4477 } else if (!status_update_file(view, &stage_status, stage_line_type)) {
4478 report("Failed to update file");
4479 return;
4480 }
4481
4482 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
4483
4484 view = VIEW(REQ_VIEW_STATUS);
4485 if (view_is_displayed(view))
4486 status_enter(view, &view->line[view->lineno]);
4487 }
4488
4489 static enum request
4490 stage_request(struct view *view, enum request request, struct line *line)
4491 {
4492 switch (request) {
4493 case REQ_STATUS_UPDATE:
4494 stage_update(view, line);
4495 break;
4496
4497 case REQ_EDIT:
4498 if (!stage_status.new.name[0])
4499 return request;
4500
4501 open_editor(stage_status.status != '?', stage_status.new.name);
4502 break;
4503
4504 case REQ_VIEW_BLAME:
4505 if (stage_status.new.name[0]) {
4506 string_copy(opt_file, stage_status.new.name);
4507 opt_ref[0] = 0;
4508 }
4509 return request;
4510
4511 case REQ_ENTER:
4512 pager_request(view, request, line);
4513 break;
4514
4515 default:
4516 return request;
4517 }
4518
4519 return REQ_NONE;
4520 }
4521
4522 static struct view_ops stage_ops = {
4523 "line",
4524 NULL,
4525 pager_read,
4526 pager_draw,
4527 stage_request,
4528 pager_grep,
4529 pager_select,
4530 };
4531
4532
4533 /*
4534 * Revision graph
4535 */
4536
4537 struct commit {
4538 char id[SIZEOF_REV]; /* SHA1 ID. */
4539 char title[128]; /* First line of the commit message. */
4540 char author[75]; /* Author of the commit. */
4541 struct tm time; /* Date from the author ident. */
4542 struct ref **refs; /* Repository references. */
4543 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
4544 size_t graph_size; /* The width of the graph array. */
4545 bool has_parents; /* Rewritten --parents seen. */
4546 };
4547
4548 /* Size of rev graph with no "padding" columns */
4549 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
4550
4551 struct rev_graph {
4552 struct rev_graph *prev, *next, *parents;
4553 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
4554 size_t size;
4555 struct commit *commit;
4556 size_t pos;
4557 unsigned int boundary:1;
4558 };
4559
4560 /* Parents of the commit being visualized. */
4561 static struct rev_graph graph_parents[4];
4562
4563 /* The current stack of revisions on the graph. */
4564 static struct rev_graph graph_stacks[4] = {
4565 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
4566 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
4567 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
4568 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
4569 };
4570
4571 static inline bool
4572 graph_parent_is_merge(struct rev_graph *graph)
4573 {
4574 return graph->parents->size > 1;
4575 }
4576
4577 static inline void
4578 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
4579 {
4580 struct commit *commit = graph->commit;
4581
4582 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
4583 commit->graph[commit->graph_size++] = symbol;
4584 }
4585
4586 static void
4587 done_rev_graph(struct rev_graph *graph)
4588 {
4589 if (graph_parent_is_merge(graph) &&
4590 graph->pos < graph->size - 1 &&
4591 graph->next->size == graph->size + graph->parents->size - 1) {
4592 size_t i = graph->pos + graph->parents->size - 1;
4593
4594 graph->commit->graph_size = i * 2;
4595 while (i < graph->next->size - 1) {
4596 append_to_rev_graph(graph, ' ');
4597 append_to_rev_graph(graph, '\\');
4598 i++;
4599 }
4600 }
4601
4602 graph->size = graph->pos = 0;
4603 graph->commit = NULL;
4604 memset(graph->parents, 0, sizeof(*graph->parents));
4605 }
4606
4607 static void
4608 push_rev_graph(struct rev_graph *graph, char *parent)
4609 {
4610 int i;
4611
4612 /* "Collapse" duplicate parents lines.
4613 *
4614 * FIXME: This needs to also update update the drawn graph but
4615 * for now it just serves as a method for pruning graph lines. */
4616 for (i = 0; i < graph->size; i++)
4617 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
4618 return;
4619
4620 if (graph->size < SIZEOF_REVITEMS) {
4621 string_copy_rev(graph->rev[graph->size++], parent);
4622 }
4623 }
4624
4625 static chtype
4626 get_rev_graph_symbol(struct rev_graph *graph)
4627 {
4628 chtype symbol;
4629
4630 if (graph->boundary)
4631 symbol = REVGRAPH_BOUND;
4632 else if (graph->parents->size == 0)
4633 symbol = REVGRAPH_INIT;
4634 else if (graph_parent_is_merge(graph))
4635 symbol = REVGRAPH_MERGE;
4636 else if (graph->pos >= graph->size)
4637 symbol = REVGRAPH_BRANCH;
4638 else
4639 symbol = REVGRAPH_COMMIT;
4640
4641 return symbol;
4642 }
4643
4644 static void
4645 draw_rev_graph(struct rev_graph *graph)
4646 {
4647 struct rev_filler {
4648 chtype separator, line;
4649 };
4650 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
4651 static struct rev_filler fillers[] = {
4652 { ' ', REVGRAPH_LINE },
4653 { '`', '.' },
4654 { '\'', ' ' },
4655 { '/', ' ' },
4656 };
4657 chtype symbol = get_rev_graph_symbol(graph);
4658 struct rev_filler *filler;
4659 size_t i;
4660
4661 filler = &fillers[DEFAULT];
4662
4663 for (i = 0; i < graph->pos; i++) {
4664 append_to_rev_graph(graph, filler->line);
4665 if (graph_parent_is_merge(graph->prev) &&
4666 graph->prev->pos == i)
4667 filler = &fillers[RSHARP];
4668
4669 append_to_rev_graph(graph, filler->separator);
4670 }
4671
4672 /* Place the symbol for this revision. */
4673 append_to_rev_graph(graph, symbol);
4674
4675 if (graph->prev->size > graph->size)
4676 filler = &fillers[RDIAG];
4677 else
4678 filler = &fillers[DEFAULT];
4679
4680 i++;
4681
4682 for (; i < graph->size; i++) {
4683 append_to_rev_graph(graph, filler->separator);
4684 append_to_rev_graph(graph, filler->line);
4685 if (graph_parent_is_merge(graph->prev) &&
4686 i < graph->prev->pos + graph->parents->size)
4687 filler = &fillers[RSHARP];
4688 if (graph->prev->size > graph->size)
4689 filler = &fillers[LDIAG];
4690 }
4691
4692 if (graph->prev->size > graph->size) {
4693 append_to_rev_graph(graph, filler->separator);
4694 if (filler->line != ' ')
4695 append_to_rev_graph(graph, filler->line);
4696 }
4697 }
4698
4699 /* Prepare the next rev graph */
4700 static void
4701 prepare_rev_graph(struct rev_graph *graph)
4702 {
4703 size_t i;
4704
4705 /* First, traverse all lines of revisions up to the active one. */
4706 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
4707 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
4708 break;
4709
4710 push_rev_graph(graph->next, graph->rev[graph->pos]);
4711 }
4712
4713 /* Interleave the new revision parent(s). */
4714 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
4715 push_rev_graph(graph->next, graph->parents->rev[i]);
4716
4717 /* Lastly, put any remaining revisions. */
4718 for (i = graph->pos + 1; i < graph->size; i++)
4719 push_rev_graph(graph->next, graph->rev[i]);
4720 }
4721
4722 static void
4723 update_rev_graph(struct rev_graph *graph)
4724 {
4725 /* If this is the finalizing update ... */
4726 if (graph->commit)
4727 prepare_rev_graph(graph);
4728
4729 /* Graph visualization needs a one rev look-ahead,
4730 * so the first update doesn't visualize anything. */
4731 if (!graph->prev->commit)
4732 return;
4733
4734 draw_rev_graph(graph->prev);
4735 done_rev_graph(graph->prev->prev);
4736 }
4737
4738
4739 /*
4740 * Main view backend
4741 */
4742
4743 static bool
4744 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
4745 {
4746 char buf[DATE_COLS + 1];
4747 struct commit *commit = line->data;
4748 enum line_type type;
4749 int col = 0;
4750 size_t timelen;
4751 int space;
4752
4753 if (!*commit->author)
4754 return FALSE;
4755
4756 space = view->width;
4757 wmove(view->win, lineno, col);
4758
4759 if (selected) {
4760 type = LINE_CURSOR;
4761 wattrset(view->win, get_line_attr(type));
4762 wchgat(view->win, -1, 0, type, NULL);
4763 } else {
4764 type = LINE_MAIN_COMMIT;
4765 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
4766 }
4767
4768 if (opt_date) {
4769 int n;
4770
4771 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
4772 n = draw_text(view, buf, view->width - col, FALSE, selected);
4773 draw_text(view, " ", view->width - col - n, FALSE, selected);
4774
4775 col += DATE_COLS;
4776 wmove(view->win, lineno, col);
4777 if (col >= view->width)
4778 return TRUE;
4779 }
4780 if (type != LINE_CURSOR)
4781 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
4782
4783 if (opt_author) {
4784 int max_len;
4785
4786 max_len = view->width - col;
4787 if (max_len > AUTHOR_COLS - 1)
4788 max_len = AUTHOR_COLS - 1;
4789 draw_text(view, commit->author, max_len, TRUE, selected);
4790 col += AUTHOR_COLS;
4791 if (col >= view->width)
4792 return TRUE;
4793 }
4794
4795 if (opt_rev_graph && commit->graph_size) {
4796 size_t graph_size = view->width - col;
4797 size_t i;
4798
4799 if (type != LINE_CURSOR)
4800 wattrset(view->win, get_line_attr(LINE_MAIN_REVGRAPH));
4801 wmove(view->win, lineno, col);
4802 if (graph_size > commit->graph_size)
4803 graph_size = commit->graph_size;
4804 /* Using waddch() instead of waddnstr() ensures that
4805 * they'll be rendered correctly for the cursor line. */
4806 for (i = 0; i < graph_size; i++)
4807 waddch(view->win, commit->graph[i]);
4808
4809 col += commit->graph_size + 1;
4810 if (col >= view->width)
4811 return TRUE;
4812 waddch(view->win, ' ');
4813 }
4814 if (type != LINE_CURSOR)
4815 wattrset(view->win, A_NORMAL);
4816
4817 wmove(view->win, lineno, col);
4818
4819 if (opt_show_refs && commit->refs) {
4820 size_t i = 0;
4821
4822 do {
4823 if (type == LINE_CURSOR)
4824 ;
4825 else if (commit->refs[i]->head)
4826 wattrset(view->win, get_line_attr(LINE_MAIN_HEAD));
4827 else if (commit->refs[i]->ltag)
4828 wattrset(view->win, get_line_attr(LINE_MAIN_LOCAL_TAG));
4829 else if (commit->refs[i]->tag)
4830 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
4831 else if (commit->refs[i]->remote)
4832 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
4833 else
4834 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
4835
4836 col += draw_text(view, "[", view->width - col, TRUE, selected);
4837 col += draw_text(view, commit->refs[i]->name, view->width - col,
4838 TRUE, selected);
4839 col += draw_text(view, "]", view->width - col, TRUE, selected);
4840 if (type != LINE_CURSOR)
4841 wattrset(view->win, A_NORMAL);
4842 col += draw_text(view, " ", view->width - col, TRUE, selected);
4843 if (col >= view->width)
4844 return TRUE;
4845 } while (commit->refs[i++]->next);
4846 }
4847
4848 if (type != LINE_CURSOR)
4849 wattrset(view->win, get_line_attr(type));
4850
4851 draw_text(view, commit->title, view->width - col, TRUE, selected);
4852 return TRUE;
4853 }
4854
4855 /* Reads git log --pretty=raw output and parses it into the commit struct. */
4856 static bool
4857 main_read(struct view *view, char *line)
4858 {
4859 static struct rev_graph *graph = graph_stacks;
4860 enum line_type type;
4861 struct commit *commit;
4862
4863 if (!line) {
4864 update_rev_graph(graph);
4865 return TRUE;
4866 }
4867
4868 type = get_line_type(line);
4869 if (type == LINE_COMMIT) {
4870 commit = calloc(1, sizeof(struct commit));
4871 if (!commit)
4872 return FALSE;
4873
4874 line += STRING_SIZE("commit ");
4875 if (*line == '-') {
4876 graph->boundary = 1;
4877 line++;
4878 }
4879
4880 string_copy_rev(commit->id, line);
4881 commit->refs = get_refs(commit->id);
4882 graph->commit = commit;
4883 add_line_data(view, commit, LINE_MAIN_COMMIT);
4884
4885 while ((line = strchr(line, ' '))) {
4886 line++;
4887 push_rev_graph(graph->parents, line);
4888 commit->has_parents = TRUE;
4889 }
4890 return TRUE;
4891 }
4892
4893 if (!view->lines)
4894 return TRUE;
4895 commit = view->line[view->lines - 1].data;
4896
4897 switch (type) {
4898 case LINE_PARENT:
4899 if (commit->has_parents)
4900 break;
4901 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
4902 break;
4903
4904 case LINE_AUTHOR:
4905 {
4906 /* Parse author lines where the name may be empty:
4907 * author <email@address.tld> 1138474660 +0100
4908 */
4909 char *ident = line + STRING_SIZE("author ");
4910 char *nameend = strchr(ident, '<');
4911 char *emailend = strchr(ident, '>');
4912
4913 if (!nameend || !emailend)
4914 break;
4915
4916 update_rev_graph(graph);
4917 graph = graph->next;
4918
4919 *nameend = *emailend = 0;
4920 ident = chomp_string(ident);
4921 if (!*ident) {
4922 ident = chomp_string(nameend + 1);
4923 if (!*ident)
4924 ident = "Unknown";
4925 }
4926
4927 string_ncopy(commit->author, ident, strlen(ident));
4928
4929 /* Parse epoch and timezone */
4930 if (emailend[1] == ' ') {
4931 char *secs = emailend + 2;
4932 char *zone = strchr(secs, ' ');
4933 time_t time = (time_t) atol(secs);
4934
4935 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
4936 long tz;
4937
4938 zone++;
4939 tz = ('0' - zone[1]) * 60 * 60 * 10;
4940 tz += ('0' - zone[2]) * 60 * 60;
4941 tz += ('0' - zone[3]) * 60;
4942 tz += ('0' - zone[4]) * 60;
4943
4944 if (zone[0] == '-')
4945 tz = -tz;
4946
4947 time -= tz;
4948 }
4949
4950 gmtime_r(&time, &commit->time);
4951 }
4952 break;
4953 }
4954 default:
4955 /* Fill in the commit title if it has not already been set. */
4956 if (commit->title[0])
4957 break;
4958
4959 /* Require titles to start with a non-space character at the
4960 * offset used by git log. */
4961 if (strncmp(line, " ", 4))
4962 break;
4963 line += 4;
4964 /* Well, if the title starts with a whitespace character,
4965 * try to be forgiving. Otherwise we end up with no title. */
4966 while (isspace(*line))
4967 line++;
4968 if (*line == '\0')
4969 break;
4970 /* FIXME: More graceful handling of titles; append "..." to
4971 * shortened titles, etc. */
4972
4973 string_ncopy(commit->title, line, strlen(line));
4974 }
4975
4976 return TRUE;
4977 }
4978
4979 static enum request
4980 main_request(struct view *view, enum request request, struct line *line)
4981 {
4982 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4983
4984 if (request == REQ_ENTER)
4985 open_view(view, REQ_VIEW_DIFF, flags);
4986 else
4987 return request;
4988
4989 return REQ_NONE;
4990 }
4991
4992 static bool
4993 main_grep(struct view *view, struct line *line)
4994 {
4995 struct commit *commit = line->data;
4996 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
4997 char buf[DATE_COLS + 1];
4998 regmatch_t pmatch;
4999
5000 for (state = S_TITLE; state < S_END; state++) {
5001 char *text;
5002
5003 switch (state) {
5004 case S_TITLE: text = commit->title; break;
5005 case S_AUTHOR: text = commit->author; break;
5006 case S_DATE:
5007 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5008 continue;
5009 text = buf;
5010 break;
5011
5012 default:
5013 return FALSE;
5014 }
5015
5016 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5017 return TRUE;
5018 }
5019
5020 return FALSE;
5021 }
5022
5023 static void
5024 main_select(struct view *view, struct line *line)
5025 {
5026 struct commit *commit = line->data;
5027
5028 string_copy_rev(view->ref, commit->id);
5029 string_copy_rev(ref_commit, view->ref);
5030 }
5031
5032 static struct view_ops main_ops = {
5033 "commit",
5034 NULL,
5035 main_read,
5036 main_draw,
5037 main_request,
5038 main_grep,
5039 main_select,
5040 };
5041
5042
5043 /*
5044 * Unicode / UTF-8 handling
5045 *
5046 * NOTE: Much of the following code for dealing with unicode is derived from
5047 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
5048 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
5049 */
5050
5051 /* I've (over)annotated a lot of code snippets because I am not entirely
5052 * confident that the approach taken by this small UTF-8 interface is correct.
5053 * --jonas */
5054
5055 static inline int
5056 unicode_width(unsigned long c)
5057 {
5058 if (c >= 0x1100 &&
5059 (c <= 0x115f /* Hangul Jamo */
5060 || c == 0x2329
5061 || c == 0x232a
5062 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
5063 /* CJK ... Yi */
5064 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
5065 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
5066 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
5067 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
5068 || (c >= 0xffe0 && c <= 0xffe6)
5069 || (c >= 0x20000 && c <= 0x2fffd)
5070 || (c >= 0x30000 && c <= 0x3fffd)))
5071 return 2;
5072
5073 if (c == '\t')
5074 return opt_tab_size;
5075
5076 return 1;
5077 }
5078
5079 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
5080 * Illegal bytes are set one. */
5081 static const unsigned char utf8_bytes[256] = {
5082 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,
5083 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,
5084 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,
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 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,
5089 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,
5090 };
5091
5092 /* Decode UTF-8 multi-byte representation into a unicode character. */
5093 static inline unsigned long
5094 utf8_to_unicode(const char *string, size_t length)
5095 {
5096 unsigned long unicode;
5097
5098 switch (length) {
5099 case 1:
5100 unicode = string[0];
5101 break;
5102 case 2:
5103 unicode = (string[0] & 0x1f) << 6;
5104 unicode += (string[1] & 0x3f);
5105 break;
5106 case 3:
5107 unicode = (string[0] & 0x0f) << 12;
5108 unicode += ((string[1] & 0x3f) << 6);
5109 unicode += (string[2] & 0x3f);
5110 break;
5111 case 4:
5112 unicode = (string[0] & 0x0f) << 18;
5113 unicode += ((string[1] & 0x3f) << 12);
5114 unicode += ((string[2] & 0x3f) << 6);
5115 unicode += (string[3] & 0x3f);
5116 break;
5117 case 5:
5118 unicode = (string[0] & 0x0f) << 24;
5119 unicode += ((string[1] & 0x3f) << 18);
5120 unicode += ((string[2] & 0x3f) << 12);
5121 unicode += ((string[3] & 0x3f) << 6);
5122 unicode += (string[4] & 0x3f);
5123 break;
5124 case 6:
5125 unicode = (string[0] & 0x01) << 30;
5126 unicode += ((string[1] & 0x3f) << 24);
5127 unicode += ((string[2] & 0x3f) << 18);
5128 unicode += ((string[3] & 0x3f) << 12);
5129 unicode += ((string[4] & 0x3f) << 6);
5130 unicode += (string[5] & 0x3f);
5131 break;
5132 default:
5133 die("Invalid unicode length");
5134 }
5135
5136 /* Invalid characters could return the special 0xfffd value but NUL
5137 * should be just as good. */
5138 return unicode > 0xffff ? 0 : unicode;
5139 }
5140
5141 /* Calculates how much of string can be shown within the given maximum width
5142 * and sets trimmed parameter to non-zero value if all of string could not be
5143 * shown. If the reserve flag is TRUE, it will reserve at least one
5144 * trailing character, which can be useful when drawing a delimiter.
5145 *
5146 * Returns the number of bytes to output from string to satisfy max_width. */
5147 static size_t
5148 utf8_length(const char *string, size_t max_width, int *trimmed, bool reserve)
5149 {
5150 const char *start = string;
5151 const char *end = strchr(string, '\0');
5152 unsigned char last_bytes = 0;
5153 size_t width = 0;
5154
5155 *trimmed = 0;
5156
5157 while (string < end) {
5158 int c = *(unsigned char *) string;
5159 unsigned char bytes = utf8_bytes[c];
5160 size_t ucwidth;
5161 unsigned long unicode;
5162
5163 if (string + bytes > end)
5164 break;
5165
5166 /* Change representation to figure out whether
5167 * it is a single- or double-width character. */
5168
5169 unicode = utf8_to_unicode(string, bytes);
5170 /* FIXME: Graceful handling of invalid unicode character. */
5171 if (!unicode)
5172 break;
5173
5174 ucwidth = unicode_width(unicode);
5175 width += ucwidth;
5176 if (width > max_width) {
5177 *trimmed = 1;
5178 if (reserve && width - ucwidth == max_width) {
5179 string -= last_bytes;
5180 }
5181 break;
5182 }
5183
5184 string += bytes;
5185 last_bytes = bytes;
5186 }
5187
5188 return string - start;
5189 }
5190
5191
5192 /*
5193 * Status management
5194 */
5195
5196 /* Whether or not the curses interface has been initialized. */
5197 static bool cursed = FALSE;
5198
5199 /* The status window is used for polling keystrokes. */
5200 static WINDOW *status_win;
5201
5202 static bool status_empty = TRUE;
5203
5204 /* Update status and title window. */
5205 static void
5206 report(const char *msg, ...)
5207 {
5208 struct view *view = display[current_view];
5209
5210 if (input_mode)
5211 return;
5212
5213 if (!view) {
5214 char buf[SIZEOF_STR];
5215 va_list args;
5216
5217 va_start(args, msg);
5218 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
5219 buf[sizeof(buf) - 1] = 0;
5220 buf[sizeof(buf) - 2] = '.';
5221 buf[sizeof(buf) - 3] = '.';
5222 buf[sizeof(buf) - 4] = '.';
5223 }
5224 va_end(args);
5225 die("%s", buf);
5226 }
5227
5228 if (!status_empty || *msg) {
5229 va_list args;
5230
5231 va_start(args, msg);
5232
5233 wmove(status_win, 0, 0);
5234 if (*msg) {
5235 vwprintw(status_win, msg, args);
5236 status_empty = FALSE;
5237 } else {
5238 status_empty = TRUE;
5239 }
5240 wclrtoeol(status_win);
5241 wrefresh(status_win);
5242
5243 va_end(args);
5244 }
5245
5246 update_view_title(view);
5247 update_display_cursor(view);
5248 }
5249
5250 /* Controls when nodelay should be in effect when polling user input. */
5251 static void
5252 set_nonblocking_input(bool loading)
5253 {
5254 static unsigned int loading_views;
5255
5256 if ((loading == FALSE && loading_views-- == 1) ||
5257 (loading == TRUE && loading_views++ == 0))
5258 nodelay(status_win, loading);
5259 }
5260
5261 static void
5262 init_display(void)
5263 {
5264 int x, y;
5265
5266 /* Initialize the curses library */
5267 if (isatty(STDIN_FILENO)) {
5268 cursed = !!initscr();
5269 } else {
5270 /* Leave stdin and stdout alone when acting as a pager. */
5271 FILE *io = fopen("/dev/tty", "r+");
5272
5273 if (!io)
5274 die("Failed to open /dev/tty");
5275 cursed = !!newterm(NULL, io, io);
5276 }
5277
5278 if (!cursed)
5279 die("Failed to initialize curses");
5280
5281 nonl(); /* Tell curses not to do NL->CR/NL on output */
5282 cbreak(); /* Take input chars one at a time, no wait for \n */
5283 noecho(); /* Don't echo input */
5284 leaveok(stdscr, TRUE);
5285
5286 if (has_colors())
5287 init_colors();
5288
5289 getmaxyx(stdscr, y, x);
5290 status_win = newwin(1, 0, y - 1, 0);
5291 if (!status_win)
5292 die("Failed to create status window");
5293
5294 /* Enable keyboard mapping */
5295 keypad(status_win, TRUE);
5296 wbkgdset(status_win, get_line_attr(LINE_STATUS));
5297 }
5298
5299 static char *
5300 read_prompt(const char *prompt)
5301 {
5302 enum { READING, STOP, CANCEL } status = READING;
5303 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
5304 int pos = 0;
5305
5306 while (status == READING) {
5307 struct view *view;
5308 int i, key;
5309
5310 input_mode = TRUE;
5311
5312 foreach_view (view, i)
5313 update_view(view);
5314
5315 input_mode = FALSE;
5316
5317 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
5318 wclrtoeol(status_win);
5319
5320 /* Refresh, accept single keystroke of input */
5321 key = wgetch(status_win);
5322 switch (key) {
5323 case KEY_RETURN:
5324 case KEY_ENTER:
5325 case '\n':
5326 status = pos ? STOP : CANCEL;
5327 break;
5328
5329 case KEY_BACKSPACE:
5330 if (pos > 0)
5331 pos--;
5332 else
5333 status = CANCEL;
5334 break;
5335
5336 case KEY_ESC:
5337 status = CANCEL;
5338 break;
5339
5340 case ERR:
5341 break;
5342
5343 default:
5344 if (pos >= sizeof(buf)) {
5345 report("Input string too long");
5346 return NULL;
5347 }
5348
5349 if (isprint(key))
5350 buf[pos++] = (char) key;
5351 }
5352 }
5353
5354 /* Clear the status window */
5355 status_empty = FALSE;
5356 report("");
5357
5358 if (status == CANCEL)
5359 return NULL;
5360
5361 buf[pos++] = 0;
5362
5363 return buf;
5364 }
5365
5366 /*
5367 * Repository references
5368 */
5369
5370 static struct ref *refs = NULL;
5371 static size_t refs_alloc = 0;
5372 static size_t refs_size = 0;
5373
5374 /* Id <-> ref store */
5375 static struct ref ***id_refs = NULL;
5376 static size_t id_refs_alloc = 0;
5377 static size_t id_refs_size = 0;
5378
5379 static struct ref **
5380 get_refs(char *id)
5381 {
5382 struct ref ***tmp_id_refs;
5383 struct ref **ref_list = NULL;
5384 size_t ref_list_alloc = 0;
5385 size_t ref_list_size = 0;
5386 size_t i;
5387
5388 for (i = 0; i < id_refs_size; i++)
5389 if (!strcmp(id, id_refs[i][0]->id))
5390 return id_refs[i];
5391
5392 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
5393 sizeof(*id_refs));
5394 if (!tmp_id_refs)
5395 return NULL;
5396
5397 id_refs = tmp_id_refs;
5398
5399 for (i = 0; i < refs_size; i++) {
5400 struct ref **tmp;
5401
5402 if (strcmp(id, refs[i].id))
5403 continue;
5404
5405 tmp = realloc_items(ref_list, &ref_list_alloc,
5406 ref_list_size + 1, sizeof(*ref_list));
5407 if (!tmp) {
5408 if (ref_list)
5409 free(ref_list);
5410 return NULL;
5411 }
5412
5413 ref_list = tmp;
5414 if (ref_list_size > 0)
5415 ref_list[ref_list_size - 1]->next = 1;
5416 ref_list[ref_list_size] = &refs[i];
5417
5418 /* XXX: The properties of the commit chains ensures that we can
5419 * safely modify the shared ref. The repo references will
5420 * always be similar for the same id. */
5421 ref_list[ref_list_size]->next = 0;
5422 ref_list_size++;
5423 }
5424
5425 if (ref_list)
5426 id_refs[id_refs_size++] = ref_list;
5427
5428 return ref_list;
5429 }
5430
5431 static int
5432 read_ref(char *id, size_t idlen, char *name, size_t namelen)
5433 {
5434 struct ref *ref;
5435 bool tag = FALSE;
5436 bool ltag = FALSE;
5437 bool remote = FALSE;
5438 bool check_replace = FALSE;
5439 bool head = FALSE;
5440
5441 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
5442 if (!strcmp(name + namelen - 3, "^{}")) {
5443 namelen -= 3;
5444 name[namelen] = 0;
5445 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
5446 check_replace = TRUE;
5447 } else {
5448 ltag = TRUE;
5449 }
5450
5451 tag = TRUE;
5452 namelen -= STRING_SIZE("refs/tags/");
5453 name += STRING_SIZE("refs/tags/");
5454
5455 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
5456 remote = TRUE;
5457 namelen -= STRING_SIZE("refs/remotes/");
5458 name += STRING_SIZE("refs/remotes/");
5459
5460 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
5461 namelen -= STRING_SIZE("refs/heads/");
5462 name += STRING_SIZE("refs/heads/");
5463 head = !strncmp(opt_head, name, namelen);
5464
5465 } else if (!strcmp(name, "HEAD")) {
5466 opt_no_head = FALSE;
5467 return OK;
5468 }
5469
5470 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
5471 /* it's an annotated tag, replace the previous sha1 with the
5472 * resolved commit id; relies on the fact git-ls-remote lists
5473 * the commit id of an annotated tag right beofre the commit id
5474 * it points to. */
5475 refs[refs_size - 1].ltag = ltag;
5476 string_copy_rev(refs[refs_size - 1].id, id);
5477
5478 return OK;
5479 }
5480 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
5481 if (!refs)
5482 return ERR;
5483
5484 ref = &refs[refs_size++];
5485 ref->name = malloc(namelen + 1);
5486 if (!ref->name)
5487 return ERR;
5488
5489 strncpy(ref->name, name, namelen);
5490 ref->name[namelen] = 0;
5491 ref->tag = tag;
5492 ref->ltag = ltag;
5493 ref->remote = remote;
5494 ref->head = head;
5495 string_copy_rev(ref->id, id);
5496
5497 return OK;
5498 }
5499
5500 static int
5501 load_refs(void)
5502 {
5503 const char *cmd_env = getenv("TIG_LS_REMOTE");
5504 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
5505
5506 return read_properties(popen(cmd, "r"), "\t", read_ref);
5507 }
5508
5509 static int
5510 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
5511 {
5512 if (!strcmp(name, "i18n.commitencoding"))
5513 string_ncopy(opt_encoding, value, valuelen);
5514
5515 if (!strcmp(name, "core.editor"))
5516 string_ncopy(opt_editor, value, valuelen);
5517
5518 return OK;
5519 }
5520
5521 static int
5522 load_repo_config(void)
5523 {
5524 return read_properties(popen(GIT_CONFIG " --list", "r"),
5525 "=", read_repo_config_option);
5526 }
5527
5528 static int
5529 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
5530 {
5531 if (!opt_git_dir[0]) {
5532 string_ncopy(opt_git_dir, name, namelen);
5533
5534 } else if (opt_is_inside_work_tree == -1) {
5535 /* This can be 3 different values depending on the
5536 * version of git being used. If git-rev-parse does not
5537 * understand --is-inside-work-tree it will simply echo
5538 * the option else either "true" or "false" is printed.
5539 * Default to true for the unknown case. */
5540 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
5541
5542 } else if (opt_cdup[0] == ' ') {
5543 string_ncopy(opt_cdup, name, namelen);
5544 } else {
5545 if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
5546 namelen -= STRING_SIZE("refs/heads/");
5547 name += STRING_SIZE("refs/heads/");
5548 string_ncopy(opt_head, name, namelen);
5549 }
5550 }
5551
5552 return OK;
5553 }
5554
5555 static int
5556 load_repo_info(void)
5557 {
5558 int result;
5559 FILE *pipe = popen("git rev-parse --git-dir --is-inside-work-tree "
5560 " --show-cdup --symbolic-full-name HEAD 2>/dev/null", "r");
5561
5562 /* XXX: The line outputted by "--show-cdup" can be empty so
5563 * initialize it to something invalid to make it possible to
5564 * detect whether it has been set or not. */
5565 opt_cdup[0] = ' ';
5566
5567 result = read_properties(pipe, "=", read_repo_info);
5568 if (opt_cdup[0] == ' ')
5569 opt_cdup[0] = 0;
5570
5571 return result;
5572 }
5573
5574 static int
5575 read_properties(FILE *pipe, const char *separators,
5576 int (*read_property)(char *, size_t, char *, size_t))
5577 {
5578 char buffer[BUFSIZ];
5579 char *name;
5580 int state = OK;
5581
5582 if (!pipe)
5583 return ERR;
5584
5585 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
5586 char *value;
5587 size_t namelen;
5588 size_t valuelen;
5589
5590 name = chomp_string(name);
5591 namelen = strcspn(name, separators);
5592
5593 if (name[namelen]) {
5594 name[namelen] = 0;
5595 value = chomp_string(name + namelen + 1);
5596 valuelen = strlen(value);
5597
5598 } else {
5599 value = "";
5600 valuelen = 0;
5601 }
5602
5603 state = read_property(name, namelen, value, valuelen);
5604 }
5605
5606 if (state != ERR && ferror(pipe))
5607 state = ERR;
5608
5609 pclose(pipe);
5610
5611 return state;
5612 }
5613
5614
5615 /*
5616 * Main
5617 */
5618
5619 static void __NORETURN
5620 quit(int sig)
5621 {
5622 /* XXX: Restore tty modes and let the OS cleanup the rest! */
5623 if (cursed)
5624 endwin();
5625 exit(0);
5626 }
5627
5628 static void __NORETURN
5629 die(const char *err, ...)
5630 {
5631 va_list args;
5632
5633 endwin();
5634
5635 va_start(args, err);
5636 fputs("tig: ", stderr);
5637 vfprintf(stderr, err, args);
5638 fputs("\n", stderr);
5639 va_end(args);
5640
5641 exit(1);
5642 }
5643
5644 static void
5645 warn(const char *msg, ...)
5646 {
5647 va_list args;
5648
5649 va_start(args, msg);
5650 fputs("tig warning: ", stderr);
5651 vfprintf(stderr, msg, args);
5652 fputs("\n", stderr);
5653 va_end(args);
5654 }
5655
5656 int
5657 main(int argc, char *argv[])
5658 {
5659 struct view *view;
5660 enum request request;
5661 size_t i;
5662
5663 signal(SIGINT, quit);
5664
5665 if (setlocale(LC_ALL, "")) {
5666 char *codeset = nl_langinfo(CODESET);
5667
5668 string_ncopy(opt_codeset, codeset, strlen(codeset));
5669 }
5670
5671 if (load_repo_info() == ERR)
5672 die("Failed to load repo info.");
5673
5674 if (load_options() == ERR)
5675 die("Failed to load user config.");
5676
5677 /* Load the repo config file so options can be overwritten from
5678 * the command line. */
5679 if (load_repo_config() == ERR)
5680 die("Failed to load repo config.");
5681
5682 if (!parse_options(argc, argv))
5683 return 0;
5684
5685 /* Require a git repository unless when running in pager mode. */
5686 if (!opt_git_dir[0])
5687 die("Not a git repository");
5688
5689 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
5690 opt_utf8 = FALSE;
5691
5692 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
5693 opt_iconv = iconv_open(opt_codeset, opt_encoding);
5694 if (opt_iconv == ICONV_NONE)
5695 die("Failed to initialize character set conversion");
5696 }
5697
5698 if (load_refs() == ERR)
5699 die("Failed to load refs.");
5700
5701 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
5702 view->cmd_env = getenv(view->cmd_env);
5703
5704 request = opt_request;
5705
5706 init_display();
5707
5708 while (view_driver(display[current_view], request)) {
5709 int key;
5710 int i;
5711
5712 foreach_view (view, i)
5713 update_view(view);
5714
5715 /* Refresh, accept single keystroke of input */
5716 key = wgetch(status_win);
5717
5718 /* wgetch() with nodelay() enabled returns ERR when there's no
5719 * input. */
5720 if (key == ERR) {
5721 request = REQ_NONE;
5722 continue;
5723 }
5724
5725 request = get_keybinding(display[current_view]->keymap, key);
5726
5727 /* Some low-level request handling. This keeps access to
5728 * status_win restricted. */
5729 switch (request) {
5730 case REQ_PROMPT:
5731 {
5732 char *cmd = read_prompt(":");
5733
5734 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
5735 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
5736 opt_request = REQ_VIEW_DIFF;
5737 } else {
5738 opt_request = REQ_VIEW_PAGER;
5739 }
5740 break;
5741 }
5742
5743 request = REQ_NONE;
5744 break;
5745 }
5746 case REQ_SEARCH:
5747 case REQ_SEARCH_BACK:
5748 {
5749 const char *prompt = request == REQ_SEARCH
5750 ? "/" : "?";
5751 char *search = read_prompt(prompt);
5752
5753 if (search)
5754 string_ncopy(opt_search, search, strlen(search));
5755 else
5756 request = REQ_NONE;
5757 break;
5758 }
5759 case REQ_SCREEN_RESIZE:
5760 {
5761 int height, width;
5762
5763 getmaxyx(stdscr, height, width);
5764
5765 /* Resize the status view and let the view driver take
5766 * care of resizing the displayed views. */
5767 wresize(status_win, 1, width);
5768 mvwin(status_win, height - 1, 0);
5769 wrefresh(status_win);
5770 break;
5771 }
5772 default:
5773 break;
5774 }
5775 }
5776
5777 quit(0);
5778
5779 return 0;
5780 }
Full-screen terminal Git browser.