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1 /* Copyright (c) 2006-2007 Jonas Fonseca <fonseca@diku.dk>
2 *
3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
14 #ifdef HAVE_CONFIG_H
15 #include "config.h"
16 #endif
18 #ifndef TIG_VERSION
19 #define TIG_VERSION "unknown-version"
20 #endif
22 #ifndef DEBUG
23 #define NDEBUG
24 #endif
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>
39 #include <regex.h>
41 #include <locale.h>
42 #include <langinfo.h>
43 #include <iconv.h>
45 /* ncurses(3): Must be defined to have extended wide-character functions. */
46 #define _XOPEN_SOURCE_EXTENDED
48 #include <curses.h>
50 #if __GNUC__ >= 3
51 #define __NORETURN __attribute__((__noreturn__))
52 #else
53 #define __NORETURN
54 #endif
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);
63 #define ABS(x) ((x) >= 0 ? (x) : -(x))
64 #define MIN(x, y) ((x) < (y) ? (x) : (y))
66 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
67 #define STRING_SIZE(x) (sizeof(x) - 1)
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 */
73 /* Revision graph */
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 '|'
82 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
84 /* This color name can be used to refer to the default term colors. */
85 #define COLOR_DEFAULT (-1)
87 #define ICONV_NONE ((iconv_t) -1)
88 #ifndef ICONV_CONST
89 #define ICONV_CONST /* nothing */
90 #endif
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 ")
96 #define AUTHOR_COLS 20
98 /* The default interval between line numbers. */
99 #define NUMBER_INTERVAL 1
101 #define TABSIZE 8
103 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
105 #ifndef GIT_CONFIG
106 #define GIT_CONFIG "git config"
107 #endif
109 #define TIG_LS_REMOTE \
110 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
112 #define TIG_DIFF_CMD \
113 "git show --pretty=fuller --no-color --root --patch-with-stat --find-copies-harder -C %s 2>/dev/null"
115 #define TIG_LOG_CMD \
116 "git log --no-color --cc --stat -n100 %s 2>/dev/null"
118 #define TIG_MAIN_CMD \
119 "git log --no-color --topo-order --parents --boundary --pretty=raw %s 2>/dev/null"
121 #define TIG_TREE_CMD \
122 "git ls-tree %s %s"
124 #define TIG_BLOB_CMD \
125 "git cat-file blob %s"
127 /* XXX: Needs to be defined to the empty string. */
128 #define TIG_HELP_CMD ""
129 #define TIG_PAGER_CMD ""
130 #define TIG_STATUS_CMD ""
131 #define TIG_STAGE_CMD ""
133 /* Some ascii-shorthands fitted into the ncurses namespace. */
134 #define KEY_TAB '\t'
135 #define KEY_RETURN '\r'
136 #define KEY_ESC 27
139 struct ref {
140 char *name; /* Ref name; tag or head names are shortened. */
141 char id[SIZEOF_REV]; /* Commit SHA1 ID */
142 unsigned int tag:1; /* Is it a tag? */
143 unsigned int ltag:1; /* If so, is the tag local? */
144 unsigned int remote:1; /* Is it a remote ref? */
145 unsigned int next:1; /* For ref lists: are there more refs? */
146 };
148 static struct ref **get_refs(char *id);
150 struct int_map {
151 const char *name;
152 int namelen;
153 int value;
154 };
156 static int
157 set_from_int_map(struct int_map *map, size_t map_size,
158 int *value, const char *name, int namelen)
159 {
161 int i;
163 for (i = 0; i < map_size; i++)
164 if (namelen == map[i].namelen &&
165 !strncasecmp(name, map[i].name, namelen)) {
166 *value = map[i].value;
167 return OK;
168 }
170 return ERR;
171 }
174 /*
175 * String helpers
176 */
178 static inline void
179 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
180 {
181 if (srclen > dstlen - 1)
182 srclen = dstlen - 1;
184 strncpy(dst, src, srclen);
185 dst[srclen] = 0;
186 }
188 /* Shorthands for safely copying into a fixed buffer. */
190 #define string_copy(dst, src) \
191 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
193 #define string_ncopy(dst, src, srclen) \
194 string_ncopy_do(dst, sizeof(dst), src, srclen)
196 #define string_copy_rev(dst, src) \
197 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
199 #define string_add(dst, from, src) \
200 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
202 static char *
203 chomp_string(char *name)
204 {
205 int namelen;
207 while (isspace(*name))
208 name++;
210 namelen = strlen(name) - 1;
211 while (namelen > 0 && isspace(name[namelen]))
212 name[namelen--] = 0;
214 return name;
215 }
217 static bool
218 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
219 {
220 va_list args;
221 size_t pos = bufpos ? *bufpos : 0;
223 va_start(args, fmt);
224 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
225 va_end(args);
227 if (bufpos)
228 *bufpos = pos;
230 return pos >= bufsize ? FALSE : TRUE;
231 }
233 #define string_format(buf, fmt, args...) \
234 string_nformat(buf, sizeof(buf), NULL, fmt, args)
236 #define string_format_from(buf, from, fmt, args...) \
237 string_nformat(buf, sizeof(buf), from, fmt, args)
239 static int
240 string_enum_compare(const char *str1, const char *str2, int len)
241 {
242 size_t i;
244 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
246 /* Diff-Header == DIFF_HEADER */
247 for (i = 0; i < len; i++) {
248 if (toupper(str1[i]) == toupper(str2[i]))
249 continue;
251 if (string_enum_sep(str1[i]) &&
252 string_enum_sep(str2[i]))
253 continue;
255 return str1[i] - str2[i];
256 }
258 return 0;
259 }
261 /* Shell quoting
262 *
263 * NOTE: The following is a slightly modified copy of the git project's shell
264 * quoting routines found in the quote.c file.
265 *
266 * Help to copy the thing properly quoted for the shell safety. any single
267 * quote is replaced with '\'', any exclamation point is replaced with '\!',
268 * and the whole thing is enclosed in a
269 *
270 * E.g.
271 * original sq_quote result
272 * name ==> name ==> 'name'
273 * a b ==> a b ==> 'a b'
274 * a'b ==> a'\''b ==> 'a'\''b'
275 * a!b ==> a'\!'b ==> 'a'\!'b'
276 */
278 static size_t
279 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
280 {
281 char c;
283 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
285 BUFPUT('\'');
286 while ((c = *src++)) {
287 if (c == '\'' || c == '!') {
288 BUFPUT('\'');
289 BUFPUT('\\');
290 BUFPUT(c);
291 BUFPUT('\'');
292 } else {
293 BUFPUT(c);
294 }
295 }
296 BUFPUT('\'');
298 if (bufsize < SIZEOF_STR)
299 buf[bufsize] = 0;
301 return bufsize;
302 }
305 /*
306 * User requests
307 */
309 #define REQ_INFO \
310 /* XXX: Keep the view request first and in sync with views[]. */ \
311 REQ_GROUP("View switching") \
312 REQ_(VIEW_MAIN, "Show main view"), \
313 REQ_(VIEW_DIFF, "Show diff view"), \
314 REQ_(VIEW_LOG, "Show log view"), \
315 REQ_(VIEW_TREE, "Show tree view"), \
316 REQ_(VIEW_BLOB, "Show blob view"), \
317 REQ_(VIEW_HELP, "Show help page"), \
318 REQ_(VIEW_PAGER, "Show pager view"), \
319 REQ_(VIEW_STATUS, "Show status view"), \
320 REQ_(VIEW_STAGE, "Show stage view"), \
321 \
322 REQ_GROUP("View manipulation") \
323 REQ_(ENTER, "Enter current line and scroll"), \
324 REQ_(NEXT, "Move to next"), \
325 REQ_(PREVIOUS, "Move to previous"), \
326 REQ_(VIEW_NEXT, "Move focus to next view"), \
327 REQ_(REFRESH, "Reload and refresh"), \
328 REQ_(VIEW_CLOSE, "Close the current view"), \
329 REQ_(QUIT, "Close all views and quit"), \
330 \
331 REQ_GROUP("Cursor navigation") \
332 REQ_(MOVE_UP, "Move cursor one line up"), \
333 REQ_(MOVE_DOWN, "Move cursor one line down"), \
334 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
335 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
336 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
337 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
338 \
339 REQ_GROUP("Scrolling") \
340 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
341 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
342 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
343 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
344 \
345 REQ_GROUP("Searching") \
346 REQ_(SEARCH, "Search the view"), \
347 REQ_(SEARCH_BACK, "Search backwards in the view"), \
348 REQ_(FIND_NEXT, "Find next search match"), \
349 REQ_(FIND_PREV, "Find previous search match"), \
350 \
351 REQ_GROUP("Misc") \
352 REQ_(PROMPT, "Bring up the prompt"), \
353 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
354 REQ_(SCREEN_RESIZE, "Resize the screen"), \
355 REQ_(SHOW_VERSION, "Show version information"), \
356 REQ_(STOP_LOADING, "Stop all loading views"), \
357 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
358 REQ_(TOGGLE_DATE, "Toggle date display"), \
359 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
360 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
361 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
362 REQ_(STATUS_UPDATE, "Update file status"), \
363 REQ_(STATUS_MERGE, "Merge file using external tool"), \
364 REQ_(TREE_PARENT, "Switch to parent directory in tree view"), \
365 REQ_(EDIT, "Open in editor"), \
366 REQ_(NONE, "Do nothing")
369 /* User action requests. */
370 enum request {
371 #define REQ_GROUP(help)
372 #define REQ_(req, help) REQ_##req
374 /* Offset all requests to avoid conflicts with ncurses getch values. */
375 REQ_OFFSET = KEY_MAX + 1,
376 REQ_INFO
378 #undef REQ_GROUP
379 #undef REQ_
380 };
382 struct request_info {
383 enum request request;
384 char *name;
385 int namelen;
386 char *help;
387 };
389 static struct request_info req_info[] = {
390 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
391 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
392 REQ_INFO
393 #undef REQ_GROUP
394 #undef REQ_
395 };
397 static enum request
398 get_request(const char *name)
399 {
400 int namelen = strlen(name);
401 int i;
403 for (i = 0; i < ARRAY_SIZE(req_info); i++)
404 if (req_info[i].namelen == namelen &&
405 !string_enum_compare(req_info[i].name, name, namelen))
406 return req_info[i].request;
408 return REQ_NONE;
409 }
412 /*
413 * Options
414 */
416 static const char usage[] =
417 "tig " TIG_VERSION " (" __DATE__ ")\n"
418 "\n"
419 "Usage: tig [options] [revs] [--] [paths]\n"
420 " or: tig show [options] [revs] [--] [paths]\n"
421 " or: tig status\n"
422 " or: tig < [git command output]\n"
423 "\n"
424 "Options:\n"
425 " -v, --version Show version and exit\n"
426 " -h, --help Show help message and exit\n";
428 /* Option and state variables. */
429 static bool opt_date = TRUE;
430 static bool opt_author = TRUE;
431 static bool opt_line_number = FALSE;
432 static bool opt_rev_graph = FALSE;
433 static bool opt_show_refs = TRUE;
434 static int opt_num_interval = NUMBER_INTERVAL;
435 static int opt_tab_size = TABSIZE;
436 static enum request opt_request = REQ_VIEW_MAIN;
437 static char opt_cmd[SIZEOF_STR] = "";
438 static char opt_path[SIZEOF_STR] = "";
439 static FILE *opt_pipe = NULL;
440 static char opt_encoding[20] = "UTF-8";
441 static bool opt_utf8 = TRUE;
442 static char opt_codeset[20] = "UTF-8";
443 static iconv_t opt_iconv = ICONV_NONE;
444 static char opt_search[SIZEOF_STR] = "";
445 static char opt_cdup[SIZEOF_STR] = "";
446 static char opt_git_dir[SIZEOF_STR] = "";
447 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
448 static char opt_editor[SIZEOF_STR] = "";
450 enum option_type {
451 OPT_NONE,
452 OPT_INT,
453 };
455 static bool
456 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
457 {
458 va_list args;
459 char *value = "";
460 int *number;
462 if (opt[0] != '-')
463 return FALSE;
465 if (opt[1] == '-') {
466 int namelen = strlen(name);
468 opt += 2;
470 if (strncmp(opt, name, namelen))
471 return FALSE;
473 if (opt[namelen] == '=')
474 value = opt + namelen + 1;
476 } else {
477 if (!short_name || opt[1] != short_name)
478 return FALSE;
479 value = opt + 2;
480 }
482 va_start(args, type);
483 if (type == OPT_INT) {
484 number = va_arg(args, int *);
485 if (isdigit(*value))
486 *number = atoi(value);
487 }
488 va_end(args);
490 return TRUE;
491 }
493 /* Returns the index of log or diff command or -1 to exit. */
494 static bool
495 parse_options(int argc, char *argv[])
496 {
497 char *altargv[1024];
498 int altargc = 0;
499 char *subcommand = NULL;
500 int i;
502 for (i = 1; i < argc; i++) {
503 char *opt = argv[i];
505 if (!strcmp(opt, "log") ||
506 !strcmp(opt, "diff")) {
507 subcommand = opt;
508 opt_request = opt[0] == 'l'
509 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
510 warn("`tig %s' has been deprecated", opt);
511 break;
512 }
514 if (!strcmp(opt, "show")) {
515 subcommand = opt;
516 opt_request = REQ_VIEW_DIFF;
517 break;
518 }
520 if (!strcmp(opt, "status")) {
521 subcommand = opt;
522 opt_request = REQ_VIEW_STATUS;
523 break;
524 }
526 if (opt[0] && opt[0] != '-')
527 break;
529 if (!strcmp(opt, "--")) {
530 i++;
531 break;
532 }
534 if (check_option(opt, 'v', "version", OPT_NONE)) {
535 printf("tig version %s\n", TIG_VERSION);
536 return FALSE;
537 }
539 if (check_option(opt, 'h', "help", OPT_NONE)) {
540 printf(usage);
541 return FALSE;
542 }
544 if (!strcmp(opt, "-S")) {
545 warn("`%s' has been deprecated; use `tig status' instead", opt);
546 opt_request = REQ_VIEW_STATUS;
547 continue;
548 }
550 if (!strcmp(opt, "-l")) {
551 opt_request = REQ_VIEW_LOG;
552 } else if (!strcmp(opt, "-d")) {
553 opt_request = REQ_VIEW_DIFF;
554 } else if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
555 opt_line_number = TRUE;
556 } else if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
557 opt_tab_size = MIN(opt_tab_size, TABSIZE);
558 } else {
559 if (altargc >= ARRAY_SIZE(altargv))
560 die("maximum number of arguments exceeded");
561 altargv[altargc++] = opt;
562 continue;
563 }
565 warn("`%s' has been deprecated", opt);
566 }
568 /* Check that no 'alt' arguments occured before a subcommand. */
569 if (subcommand && i < argc && altargc > 0)
570 die("unknown arguments before `%s'", argv[i]);
572 if (!isatty(STDIN_FILENO)) {
573 opt_request = REQ_VIEW_PAGER;
574 opt_pipe = stdin;
576 } else if (opt_request == REQ_VIEW_STATUS) {
577 if (argc - i > 1)
578 warn("ignoring arguments after `%s'", argv[i]);
580 } else if (i < argc || altargc > 0) {
581 int alti = 0;
582 size_t buf_size;
584 if (opt_request == REQ_VIEW_MAIN)
585 /* XXX: This is vulnerable to the user overriding
586 * options required for the main view parser. */
587 string_copy(opt_cmd, "git log --no-color --pretty=raw --boundary --parents");
588 else
589 string_copy(opt_cmd, "git");
590 buf_size = strlen(opt_cmd);
592 while (buf_size < sizeof(opt_cmd) && alti < altargc) {
593 opt_cmd[buf_size++] = ' ';
594 buf_size = sq_quote(opt_cmd, buf_size, altargv[alti++]);
595 }
597 while (buf_size < sizeof(opt_cmd) && i < argc) {
598 opt_cmd[buf_size++] = ' ';
599 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
600 }
602 if (buf_size >= sizeof(opt_cmd))
603 die("command too long");
605 opt_cmd[buf_size] = 0;
606 }
608 return TRUE;
609 }
612 /*
613 * Line-oriented content detection.
614 */
616 #define LINE_INFO \
617 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
618 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
619 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
620 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
621 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
622 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
623 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
624 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
625 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
626 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
627 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
628 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
629 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
630 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
631 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
632 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
633 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
634 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
635 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
636 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
637 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
638 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
639 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
640 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
641 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
642 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
643 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
644 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
645 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
646 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
647 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
648 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
649 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
650 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
651 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
652 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
653 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
654 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
655 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
656 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
657 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
658 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
659 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
660 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
661 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
662 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
663 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
664 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
665 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0)
667 enum line_type {
668 #define LINE(type, line, fg, bg, attr) \
669 LINE_##type
670 LINE_INFO
671 #undef LINE
672 };
674 struct line_info {
675 const char *name; /* Option name. */
676 int namelen; /* Size of option name. */
677 const char *line; /* The start of line to match. */
678 int linelen; /* Size of string to match. */
679 int fg, bg, attr; /* Color and text attributes for the lines. */
680 };
682 static struct line_info line_info[] = {
683 #define LINE(type, line, fg, bg, attr) \
684 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
685 LINE_INFO
686 #undef LINE
687 };
689 static enum line_type
690 get_line_type(char *line)
691 {
692 int linelen = strlen(line);
693 enum line_type type;
695 for (type = 0; type < ARRAY_SIZE(line_info); type++)
696 /* Case insensitive search matches Signed-off-by lines better. */
697 if (linelen >= line_info[type].linelen &&
698 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
699 return type;
701 return LINE_DEFAULT;
702 }
704 static inline int
705 get_line_attr(enum line_type type)
706 {
707 assert(type < ARRAY_SIZE(line_info));
708 return COLOR_PAIR(type) | line_info[type].attr;
709 }
711 static struct line_info *
712 get_line_info(char *name, int namelen)
713 {
714 enum line_type type;
716 for (type = 0; type < ARRAY_SIZE(line_info); type++)
717 if (namelen == line_info[type].namelen &&
718 !string_enum_compare(line_info[type].name, name, namelen))
719 return &line_info[type];
721 return NULL;
722 }
724 static void
725 init_colors(void)
726 {
727 int default_bg = line_info[LINE_DEFAULT].bg;
728 int default_fg = line_info[LINE_DEFAULT].fg;
729 enum line_type type;
731 start_color();
733 if (assume_default_colors(default_fg, default_bg) == ERR) {
734 default_bg = COLOR_BLACK;
735 default_fg = COLOR_WHITE;
736 }
738 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
739 struct line_info *info = &line_info[type];
740 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
741 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
743 init_pair(type, fg, bg);
744 }
745 }
747 struct line {
748 enum line_type type;
750 /* State flags */
751 unsigned int selected:1;
753 void *data; /* User data */
754 };
757 /*
758 * Keys
759 */
761 struct keybinding {
762 int alias;
763 enum request request;
764 struct keybinding *next;
765 };
767 static struct keybinding default_keybindings[] = {
768 /* View switching */
769 { 'm', REQ_VIEW_MAIN },
770 { 'd', REQ_VIEW_DIFF },
771 { 'l', REQ_VIEW_LOG },
772 { 't', REQ_VIEW_TREE },
773 { 'f', REQ_VIEW_BLOB },
774 { 'p', REQ_VIEW_PAGER },
775 { 'h', REQ_VIEW_HELP },
776 { 'S', REQ_VIEW_STATUS },
777 { 'c', REQ_VIEW_STAGE },
779 /* View manipulation */
780 { 'q', REQ_VIEW_CLOSE },
781 { KEY_TAB, REQ_VIEW_NEXT },
782 { KEY_RETURN, REQ_ENTER },
783 { KEY_UP, REQ_PREVIOUS },
784 { KEY_DOWN, REQ_NEXT },
785 { 'R', REQ_REFRESH },
787 /* Cursor navigation */
788 { 'k', REQ_MOVE_UP },
789 { 'j', REQ_MOVE_DOWN },
790 { KEY_HOME, REQ_MOVE_FIRST_LINE },
791 { KEY_END, REQ_MOVE_LAST_LINE },
792 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
793 { ' ', REQ_MOVE_PAGE_DOWN },
794 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
795 { 'b', REQ_MOVE_PAGE_UP },
796 { '-', REQ_MOVE_PAGE_UP },
798 /* Scrolling */
799 { KEY_IC, REQ_SCROLL_LINE_UP },
800 { KEY_DC, REQ_SCROLL_LINE_DOWN },
801 { 'w', REQ_SCROLL_PAGE_UP },
802 { 's', REQ_SCROLL_PAGE_DOWN },
804 /* Searching */
805 { '/', REQ_SEARCH },
806 { '?', REQ_SEARCH_BACK },
807 { 'n', REQ_FIND_NEXT },
808 { 'N', REQ_FIND_PREV },
810 /* Misc */
811 { 'Q', REQ_QUIT },
812 { 'z', REQ_STOP_LOADING },
813 { 'v', REQ_SHOW_VERSION },
814 { 'r', REQ_SCREEN_REDRAW },
815 { '.', REQ_TOGGLE_LINENO },
816 { 'D', REQ_TOGGLE_DATE },
817 { 'A', REQ_TOGGLE_AUTHOR },
818 { 'g', REQ_TOGGLE_REV_GRAPH },
819 { 'F', REQ_TOGGLE_REFS },
820 { ':', REQ_PROMPT },
821 { 'u', REQ_STATUS_UPDATE },
822 { 'M', REQ_STATUS_MERGE },
823 { ',', REQ_TREE_PARENT },
824 { 'e', REQ_EDIT },
826 /* Using the ncurses SIGWINCH handler. */
827 { KEY_RESIZE, REQ_SCREEN_RESIZE },
828 };
830 #define KEYMAP_INFO \
831 KEYMAP_(GENERIC), \
832 KEYMAP_(MAIN), \
833 KEYMAP_(DIFF), \
834 KEYMAP_(LOG), \
835 KEYMAP_(TREE), \
836 KEYMAP_(BLOB), \
837 KEYMAP_(PAGER), \
838 KEYMAP_(HELP), \
839 KEYMAP_(STATUS), \
840 KEYMAP_(STAGE)
842 enum keymap {
843 #define KEYMAP_(name) KEYMAP_##name
844 KEYMAP_INFO
845 #undef KEYMAP_
846 };
848 static struct int_map keymap_table[] = {
849 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
850 KEYMAP_INFO
851 #undef KEYMAP_
852 };
854 #define set_keymap(map, name) \
855 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
857 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
859 static void
860 add_keybinding(enum keymap keymap, enum request request, int key)
861 {
862 struct keybinding *keybinding;
864 keybinding = calloc(1, sizeof(*keybinding));
865 if (!keybinding)
866 die("Failed to allocate keybinding");
868 keybinding->alias = key;
869 keybinding->request = request;
870 keybinding->next = keybindings[keymap];
871 keybindings[keymap] = keybinding;
872 }
874 /* Looks for a key binding first in the given map, then in the generic map, and
875 * lastly in the default keybindings. */
876 static enum request
877 get_keybinding(enum keymap keymap, int key)
878 {
879 struct keybinding *kbd;
880 int i;
882 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
883 if (kbd->alias == key)
884 return kbd->request;
886 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
887 if (kbd->alias == key)
888 return kbd->request;
890 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
891 if (default_keybindings[i].alias == key)
892 return default_keybindings[i].request;
894 return (enum request) key;
895 }
898 struct key {
899 char *name;
900 int value;
901 };
903 static struct key key_table[] = {
904 { "Enter", KEY_RETURN },
905 { "Space", ' ' },
906 { "Backspace", KEY_BACKSPACE },
907 { "Tab", KEY_TAB },
908 { "Escape", KEY_ESC },
909 { "Left", KEY_LEFT },
910 { "Right", KEY_RIGHT },
911 { "Up", KEY_UP },
912 { "Down", KEY_DOWN },
913 { "Insert", KEY_IC },
914 { "Delete", KEY_DC },
915 { "Hash", '#' },
916 { "Home", KEY_HOME },
917 { "End", KEY_END },
918 { "PageUp", KEY_PPAGE },
919 { "PageDown", KEY_NPAGE },
920 { "F1", KEY_F(1) },
921 { "F2", KEY_F(2) },
922 { "F3", KEY_F(3) },
923 { "F4", KEY_F(4) },
924 { "F5", KEY_F(5) },
925 { "F6", KEY_F(6) },
926 { "F7", KEY_F(7) },
927 { "F8", KEY_F(8) },
928 { "F9", KEY_F(9) },
929 { "F10", KEY_F(10) },
930 { "F11", KEY_F(11) },
931 { "F12", KEY_F(12) },
932 };
934 static int
935 get_key_value(const char *name)
936 {
937 int i;
939 for (i = 0; i < ARRAY_SIZE(key_table); i++)
940 if (!strcasecmp(key_table[i].name, name))
941 return key_table[i].value;
943 if (strlen(name) == 1 && isprint(*name))
944 return (int) *name;
946 return ERR;
947 }
949 static char *
950 get_key_name(int key_value)
951 {
952 static char key_char[] = "'X'";
953 char *seq = NULL;
954 int key;
956 for (key = 0; key < ARRAY_SIZE(key_table); key++)
957 if (key_table[key].value == key_value)
958 seq = key_table[key].name;
960 if (seq == NULL &&
961 key_value < 127 &&
962 isprint(key_value)) {
963 key_char[1] = (char) key_value;
964 seq = key_char;
965 }
967 return seq ? seq : "'?'";
968 }
970 static char *
971 get_key(enum request request)
972 {
973 static char buf[BUFSIZ];
974 size_t pos = 0;
975 char *sep = "";
976 int i;
978 buf[pos] = 0;
980 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
981 struct keybinding *keybinding = &default_keybindings[i];
983 if (keybinding->request != request)
984 continue;
986 if (!string_format_from(buf, &pos, "%s%s", sep,
987 get_key_name(keybinding->alias)))
988 return "Too many keybindings!";
989 sep = ", ";
990 }
992 return buf;
993 }
995 struct run_request {
996 enum keymap keymap;
997 int key;
998 char cmd[SIZEOF_STR];
999 };
1001 static struct run_request *run_request;
1002 static size_t run_requests;
1004 static enum request
1005 add_run_request(enum keymap keymap, int key, int argc, char **argv)
1006 {
1007 struct run_request *tmp;
1008 struct run_request req = { keymap, key };
1009 size_t bufpos;
1011 for (bufpos = 0; argc > 0; argc--, argv++)
1012 if (!string_format_from(req.cmd, &bufpos, "%s ", *argv))
1013 return REQ_NONE;
1015 req.cmd[bufpos - 1] = 0;
1017 tmp = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
1018 if (!tmp)
1019 return REQ_NONE;
1021 run_request = tmp;
1022 run_request[run_requests++] = req;
1024 return REQ_NONE + run_requests;
1025 }
1027 static struct run_request *
1028 get_run_request(enum request request)
1029 {
1030 if (request <= REQ_NONE)
1031 return NULL;
1032 return &run_request[request - REQ_NONE - 1];
1033 }
1035 static void
1036 add_builtin_run_requests(void)
1037 {
1038 struct {
1039 enum keymap keymap;
1040 int key;
1041 char *argv[1];
1042 } reqs[] = {
1043 { KEYMAP_MAIN, 'C', { "git cherry-pick %(commit)" } },
1044 { KEYMAP_GENERIC, 'G', { "git gc" } },
1045 };
1046 int i;
1048 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1049 enum request req;
1051 req = add_run_request(reqs[i].keymap, reqs[i].key, 1, reqs[i].argv);
1052 if (req != REQ_NONE)
1053 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1054 }
1055 }
1057 /*
1058 * User config file handling.
1059 */
1061 static struct int_map color_map[] = {
1062 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
1063 COLOR_MAP(DEFAULT),
1064 COLOR_MAP(BLACK),
1065 COLOR_MAP(BLUE),
1066 COLOR_MAP(CYAN),
1067 COLOR_MAP(GREEN),
1068 COLOR_MAP(MAGENTA),
1069 COLOR_MAP(RED),
1070 COLOR_MAP(WHITE),
1071 COLOR_MAP(YELLOW),
1072 };
1074 #define set_color(color, name) \
1075 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
1077 static struct int_map attr_map[] = {
1078 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
1079 ATTR_MAP(NORMAL),
1080 ATTR_MAP(BLINK),
1081 ATTR_MAP(BOLD),
1082 ATTR_MAP(DIM),
1083 ATTR_MAP(REVERSE),
1084 ATTR_MAP(STANDOUT),
1085 ATTR_MAP(UNDERLINE),
1086 };
1088 #define set_attribute(attr, name) \
1089 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
1091 static int config_lineno;
1092 static bool config_errors;
1093 static char *config_msg;
1095 /* Wants: object fgcolor bgcolor [attr] */
1096 static int
1097 option_color_command(int argc, char *argv[])
1098 {
1099 struct line_info *info;
1101 if (argc != 3 && argc != 4) {
1102 config_msg = "Wrong number of arguments given to color command";
1103 return ERR;
1104 }
1106 info = get_line_info(argv[0], strlen(argv[0]));
1107 if (!info) {
1108 config_msg = "Unknown color name";
1109 return ERR;
1110 }
1112 if (set_color(&info->fg, argv[1]) == ERR ||
1113 set_color(&info->bg, argv[2]) == ERR) {
1114 config_msg = "Unknown color";
1115 return ERR;
1116 }
1118 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1119 config_msg = "Unknown attribute";
1120 return ERR;
1121 }
1123 return OK;
1124 }
1126 static bool parse_bool(const char *s)
1127 {
1128 return (!strcmp(s, "1") || !strcmp(s, "true") ||
1129 !strcmp(s, "yes")) ? TRUE : FALSE;
1130 }
1132 /* Wants: name = value */
1133 static int
1134 option_set_command(int argc, char *argv[])
1135 {
1136 if (argc != 3) {
1137 config_msg = "Wrong number of arguments given to set command";
1138 return ERR;
1139 }
1141 if (strcmp(argv[1], "=")) {
1142 config_msg = "No value assigned";
1143 return ERR;
1144 }
1146 if (!strcmp(argv[0], "show-author")) {
1147 opt_author = parse_bool(argv[2]);
1148 return OK;
1149 }
1151 if (!strcmp(argv[0], "show-date")) {
1152 opt_date = parse_bool(argv[2]);
1153 return OK;
1154 }
1156 if (!strcmp(argv[0], "show-rev-graph")) {
1157 opt_rev_graph = parse_bool(argv[2]);
1158 return OK;
1159 }
1161 if (!strcmp(argv[0], "show-refs")) {
1162 opt_show_refs = parse_bool(argv[2]);
1163 return OK;
1164 }
1166 if (!strcmp(argv[0], "show-line-numbers")) {
1167 opt_line_number = parse_bool(argv[2]);
1168 return OK;
1169 }
1171 if (!strcmp(argv[0], "line-number-interval")) {
1172 opt_num_interval = atoi(argv[2]);
1173 return OK;
1174 }
1176 if (!strcmp(argv[0], "tab-size")) {
1177 opt_tab_size = atoi(argv[2]);
1178 return OK;
1179 }
1181 if (!strcmp(argv[0], "commit-encoding")) {
1182 char *arg = argv[2];
1183 int delimiter = *arg;
1184 int i;
1186 switch (delimiter) {
1187 case '"':
1188 case '\'':
1189 for (arg++, i = 0; arg[i]; i++)
1190 if (arg[i] == delimiter) {
1191 arg[i] = 0;
1192 break;
1193 }
1194 default:
1195 string_ncopy(opt_encoding, arg, strlen(arg));
1196 return OK;
1197 }
1198 }
1200 config_msg = "Unknown variable name";
1201 return ERR;
1202 }
1204 /* Wants: mode request key */
1205 static int
1206 option_bind_command(int argc, char *argv[])
1207 {
1208 enum request request;
1209 int keymap;
1210 int key;
1212 if (argc < 3) {
1213 config_msg = "Wrong number of arguments given to bind command";
1214 return ERR;
1215 }
1217 if (set_keymap(&keymap, argv[0]) == ERR) {
1218 config_msg = "Unknown key map";
1219 return ERR;
1220 }
1222 key = get_key_value(argv[1]);
1223 if (key == ERR) {
1224 config_msg = "Unknown key";
1225 return ERR;
1226 }
1228 request = get_request(argv[2]);
1229 if (request == REQ_NONE) {
1230 const char *obsolete[] = { "cherry-pick" };
1231 size_t namelen = strlen(argv[2]);
1232 int i;
1234 for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
1235 if (namelen == strlen(obsolete[i]) &&
1236 !string_enum_compare(obsolete[i], argv[2], namelen)) {
1237 config_msg = "Obsolete request name";
1238 return ERR;
1239 }
1240 }
1241 }
1242 if (request == REQ_NONE && *argv[2]++ == '!')
1243 request = add_run_request(keymap, key, argc - 2, argv + 2);
1244 if (request == REQ_NONE) {
1245 config_msg = "Unknown request name";
1246 return ERR;
1247 }
1249 add_keybinding(keymap, request, key);
1251 return OK;
1252 }
1254 static int
1255 set_option(char *opt, char *value)
1256 {
1257 char *argv[16];
1258 int valuelen;
1259 int argc = 0;
1261 /* Tokenize */
1262 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1263 argv[argc++] = value;
1264 value += valuelen;
1266 /* Nothing more to tokenize or last available token. */
1267 if (!*value || argc >= ARRAY_SIZE(argv))
1268 break;
1270 *value++ = 0;
1271 while (isspace(*value))
1272 value++;
1273 }
1275 if (!strcmp(opt, "color"))
1276 return option_color_command(argc, argv);
1278 if (!strcmp(opt, "set"))
1279 return option_set_command(argc, argv);
1281 if (!strcmp(opt, "bind"))
1282 return option_bind_command(argc, argv);
1284 config_msg = "Unknown option command";
1285 return ERR;
1286 }
1288 static int
1289 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1290 {
1291 int status = OK;
1293 config_lineno++;
1294 config_msg = "Internal error";
1296 /* Check for comment markers, since read_properties() will
1297 * only ensure opt and value are split at first " \t". */
1298 optlen = strcspn(opt, "#");
1299 if (optlen == 0)
1300 return OK;
1302 if (opt[optlen] != 0) {
1303 config_msg = "No option value";
1304 status = ERR;
1306 } else {
1307 /* Look for comment endings in the value. */
1308 size_t len = strcspn(value, "#");
1310 if (len < valuelen) {
1311 valuelen = len;
1312 value[valuelen] = 0;
1313 }
1315 status = set_option(opt, value);
1316 }
1318 if (status == ERR) {
1319 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1320 config_lineno, (int) optlen, opt, config_msg);
1321 config_errors = TRUE;
1322 }
1324 /* Always keep going if errors are encountered. */
1325 return OK;
1326 }
1328 static void
1329 load_option_file(const char *path)
1330 {
1331 FILE *file;
1333 /* It's ok that the file doesn't exist. */
1334 file = fopen(path, "r");
1335 if (!file)
1336 return;
1338 config_lineno = 0;
1339 config_errors = FALSE;
1341 if (read_properties(file, " \t", read_option) == ERR ||
1342 config_errors == TRUE)
1343 fprintf(stderr, "Errors while loading %s.\n", path);
1344 }
1346 static int
1347 load_options(void)
1348 {
1349 char *home = getenv("HOME");
1350 char *tigrc_user = getenv("TIGRC_USER");
1351 char *tigrc_system = getenv("TIGRC_SYSTEM");
1352 char buf[SIZEOF_STR];
1354 add_builtin_run_requests();
1356 if (!tigrc_system) {
1357 if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
1358 return ERR;
1359 tigrc_system = buf;
1360 }
1361 load_option_file(tigrc_system);
1363 if (!tigrc_user) {
1364 if (!home || !string_format(buf, "%s/.tigrc", home))
1365 return ERR;
1366 tigrc_user = buf;
1367 }
1368 load_option_file(tigrc_user);
1370 return OK;
1371 }
1374 /*
1375 * The viewer
1376 */
1378 struct view;
1379 struct view_ops;
1381 /* The display array of active views and the index of the current view. */
1382 static struct view *display[2];
1383 static unsigned int current_view;
1385 /* Reading from the prompt? */
1386 static bool input_mode = FALSE;
1388 #define foreach_displayed_view(view, i) \
1389 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1391 #define displayed_views() (display[1] != NULL ? 2 : 1)
1393 /* Current head and commit ID */
1394 static char ref_blob[SIZEOF_REF] = "";
1395 static char ref_commit[SIZEOF_REF] = "HEAD";
1396 static char ref_head[SIZEOF_REF] = "HEAD";
1398 struct view {
1399 const char *name; /* View name */
1400 const char *cmd_fmt; /* Default command line format */
1401 const char *cmd_env; /* Command line set via environment */
1402 const char *id; /* Points to either of ref_{head,commit,blob} */
1404 struct view_ops *ops; /* View operations */
1406 enum keymap keymap; /* What keymap does this view have */
1408 char cmd[SIZEOF_STR]; /* Command buffer */
1409 char ref[SIZEOF_REF]; /* Hovered commit reference */
1410 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1412 int height, width; /* The width and height of the main window */
1413 WINDOW *win; /* The main window */
1414 WINDOW *title; /* The title window living below the main window */
1416 /* Navigation */
1417 unsigned long offset; /* Offset of the window top */
1418 unsigned long lineno; /* Current line number */
1420 /* Searching */
1421 char grep[SIZEOF_STR]; /* Search string */
1422 regex_t *regex; /* Pre-compiled regex */
1424 /* If non-NULL, points to the view that opened this view. If this view
1425 * is closed tig will switch back to the parent view. */
1426 struct view *parent;
1428 /* Buffering */
1429 size_t lines; /* Total number of lines */
1430 struct line *line; /* Line index */
1431 size_t line_alloc; /* Total number of allocated lines */
1432 size_t line_size; /* Total number of used lines */
1433 unsigned int digits; /* Number of digits in the lines member. */
1435 /* Loading */
1436 FILE *pipe;
1437 time_t start_time;
1438 };
1440 struct view_ops {
1441 /* What type of content being displayed. Used in the title bar. */
1442 const char *type;
1443 /* Open and reads in all view content. */
1444 bool (*open)(struct view *view);
1445 /* Read one line; updates view->line. */
1446 bool (*read)(struct view *view, char *data);
1447 /* Draw one line; @lineno must be < view->height. */
1448 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1449 /* Depending on view handle a special requests. */
1450 enum request (*request)(struct view *view, enum request request, struct line *line);
1451 /* Search for regex in a line. */
1452 bool (*grep)(struct view *view, struct line *line);
1453 /* Select line */
1454 void (*select)(struct view *view, struct line *line);
1455 };
1457 static struct view_ops pager_ops;
1458 static struct view_ops main_ops;
1459 static struct view_ops tree_ops;
1460 static struct view_ops blob_ops;
1461 static struct view_ops help_ops;
1462 static struct view_ops status_ops;
1463 static struct view_ops stage_ops;
1465 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1466 { name, cmd, #env, ref, ops, map}
1468 #define VIEW_(id, name, ops, ref) \
1469 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1472 static struct view views[] = {
1473 VIEW_(MAIN, "main", &main_ops, ref_head),
1474 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1475 VIEW_(LOG, "log", &pager_ops, ref_head),
1476 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1477 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1478 VIEW_(HELP, "help", &help_ops, ""),
1479 VIEW_(PAGER, "pager", &pager_ops, "stdin"),
1480 VIEW_(STATUS, "status", &status_ops, ""),
1481 VIEW_(STAGE, "stage", &stage_ops, ""),
1482 };
1484 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1486 #define foreach_view(view, i) \
1487 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1489 #define view_is_displayed(view) \
1490 (view == display[0] || view == display[1])
1492 static int
1493 draw_text(struct view *view, const char *string, int max_len, int col,
1494 bool use_tilde, int tilde_attr)
1495 {
1496 int len = 0;
1497 int trimmed = FALSE;
1499 if (max_len <= 0)
1500 return 0;
1502 if (opt_utf8) {
1503 len = utf8_length(string, max_len, &trimmed, use_tilde);
1504 } else {
1505 len = strlen(string);
1506 if (len > max_len) {
1507 if (use_tilde) {
1508 max_len -= 1;
1509 }
1510 len = max_len;
1511 trimmed = TRUE;
1512 }
1513 }
1515 waddnstr(view->win, string, len);
1516 if (trimmed && use_tilde) {
1517 if (tilde_attr != -1)
1518 wattrset(view->win, tilde_attr);
1519 waddch(view->win, '~');
1520 len++;
1521 }
1523 return len;
1524 }
1526 static bool
1527 draw_view_line(struct view *view, unsigned int lineno)
1528 {
1529 struct line *line;
1530 bool selected = (view->offset + lineno == view->lineno);
1531 bool draw_ok;
1533 assert(view_is_displayed(view));
1535 if (view->offset + lineno >= view->lines)
1536 return FALSE;
1538 line = &view->line[view->offset + lineno];
1540 if (selected) {
1541 line->selected = TRUE;
1542 view->ops->select(view, line);
1543 } else if (line->selected) {
1544 line->selected = FALSE;
1545 wmove(view->win, lineno, 0);
1546 wclrtoeol(view->win);
1547 }
1549 scrollok(view->win, FALSE);
1550 draw_ok = view->ops->draw(view, line, lineno, selected);
1551 scrollok(view->win, TRUE);
1553 return draw_ok;
1554 }
1556 static void
1557 redraw_view_from(struct view *view, int lineno)
1558 {
1559 assert(0 <= lineno && lineno < view->height);
1561 for (; lineno < view->height; lineno++) {
1562 if (!draw_view_line(view, lineno))
1563 break;
1564 }
1566 redrawwin(view->win);
1567 if (input_mode)
1568 wnoutrefresh(view->win);
1569 else
1570 wrefresh(view->win);
1571 }
1573 static void
1574 redraw_view(struct view *view)
1575 {
1576 wclear(view->win);
1577 redraw_view_from(view, 0);
1578 }
1581 static void
1582 update_view_title(struct view *view)
1583 {
1584 char buf[SIZEOF_STR];
1585 char state[SIZEOF_STR];
1586 size_t bufpos = 0, statelen = 0;
1588 assert(view_is_displayed(view));
1590 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1591 unsigned int view_lines = view->offset + view->height;
1592 unsigned int lines = view->lines
1593 ? MIN(view_lines, view->lines) * 100 / view->lines
1594 : 0;
1596 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1597 view->ops->type,
1598 view->lineno + 1,
1599 view->lines,
1600 lines);
1602 if (view->pipe) {
1603 time_t secs = time(NULL) - view->start_time;
1605 /* Three git seconds are a long time ... */
1606 if (secs > 2)
1607 string_format_from(state, &statelen, " %lds", secs);
1608 }
1609 }
1611 string_format_from(buf, &bufpos, "[%s]", view->name);
1612 if (*view->ref && bufpos < view->width) {
1613 size_t refsize = strlen(view->ref);
1614 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1616 if (minsize < view->width)
1617 refsize = view->width - minsize + 7;
1618 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1619 }
1621 if (statelen && bufpos < view->width) {
1622 string_format_from(buf, &bufpos, " %s", state);
1623 }
1625 if (view == display[current_view])
1626 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1627 else
1628 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1630 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1631 wclrtoeol(view->title);
1632 wmove(view->title, 0, view->width - 1);
1634 if (input_mode)
1635 wnoutrefresh(view->title);
1636 else
1637 wrefresh(view->title);
1638 }
1640 static void
1641 resize_display(void)
1642 {
1643 int offset, i;
1644 struct view *base = display[0];
1645 struct view *view = display[1] ? display[1] : display[0];
1647 /* Setup window dimensions */
1649 getmaxyx(stdscr, base->height, base->width);
1651 /* Make room for the status window. */
1652 base->height -= 1;
1654 if (view != base) {
1655 /* Horizontal split. */
1656 view->width = base->width;
1657 view->height = SCALE_SPLIT_VIEW(base->height);
1658 base->height -= view->height;
1660 /* Make room for the title bar. */
1661 view->height -= 1;
1662 }
1664 /* Make room for the title bar. */
1665 base->height -= 1;
1667 offset = 0;
1669 foreach_displayed_view (view, i) {
1670 if (!view->win) {
1671 view->win = newwin(view->height, 0, offset, 0);
1672 if (!view->win)
1673 die("Failed to create %s view", view->name);
1675 scrollok(view->win, TRUE);
1677 view->title = newwin(1, 0, offset + view->height, 0);
1678 if (!view->title)
1679 die("Failed to create title window");
1681 } else {
1682 wresize(view->win, view->height, view->width);
1683 mvwin(view->win, offset, 0);
1684 mvwin(view->title, offset + view->height, 0);
1685 }
1687 offset += view->height + 1;
1688 }
1689 }
1691 static void
1692 redraw_display(void)
1693 {
1694 struct view *view;
1695 int i;
1697 foreach_displayed_view (view, i) {
1698 redraw_view(view);
1699 update_view_title(view);
1700 }
1701 }
1703 static void
1704 update_display_cursor(struct view *view)
1705 {
1706 /* Move the cursor to the right-most column of the cursor line.
1707 *
1708 * XXX: This could turn out to be a bit expensive, but it ensures that
1709 * the cursor does not jump around. */
1710 if (view->lines) {
1711 wmove(view->win, view->lineno - view->offset, view->width - 1);
1712 wrefresh(view->win);
1713 }
1714 }
1716 /*
1717 * Navigation
1718 */
1720 /* Scrolling backend */
1721 static void
1722 do_scroll_view(struct view *view, int lines)
1723 {
1724 bool redraw_current_line = FALSE;
1726 /* The rendering expects the new offset. */
1727 view->offset += lines;
1729 assert(0 <= view->offset && view->offset < view->lines);
1730 assert(lines);
1732 /* Move current line into the view. */
1733 if (view->lineno < view->offset) {
1734 view->lineno = view->offset;
1735 redraw_current_line = TRUE;
1736 } else if (view->lineno >= view->offset + view->height) {
1737 view->lineno = view->offset + view->height - 1;
1738 redraw_current_line = TRUE;
1739 }
1741 assert(view->offset <= view->lineno && view->lineno < view->lines);
1743 /* Redraw the whole screen if scrolling is pointless. */
1744 if (view->height < ABS(lines)) {
1745 redraw_view(view);
1747 } else {
1748 int line = lines > 0 ? view->height - lines : 0;
1749 int end = line + ABS(lines);
1751 wscrl(view->win, lines);
1753 for (; line < end; line++) {
1754 if (!draw_view_line(view, line))
1755 break;
1756 }
1758 if (redraw_current_line)
1759 draw_view_line(view, view->lineno - view->offset);
1760 }
1762 redrawwin(view->win);
1763 wrefresh(view->win);
1764 report("");
1765 }
1767 /* Scroll frontend */
1768 static void
1769 scroll_view(struct view *view, enum request request)
1770 {
1771 int lines = 1;
1773 assert(view_is_displayed(view));
1775 switch (request) {
1776 case REQ_SCROLL_PAGE_DOWN:
1777 lines = view->height;
1778 case REQ_SCROLL_LINE_DOWN:
1779 if (view->offset + lines > view->lines)
1780 lines = view->lines - view->offset;
1782 if (lines == 0 || view->offset + view->height >= view->lines) {
1783 report("Cannot scroll beyond the last line");
1784 return;
1785 }
1786 break;
1788 case REQ_SCROLL_PAGE_UP:
1789 lines = view->height;
1790 case REQ_SCROLL_LINE_UP:
1791 if (lines > view->offset)
1792 lines = view->offset;
1794 if (lines == 0) {
1795 report("Cannot scroll beyond the first line");
1796 return;
1797 }
1799 lines = -lines;
1800 break;
1802 default:
1803 die("request %d not handled in switch", request);
1804 }
1806 do_scroll_view(view, lines);
1807 }
1809 /* Cursor moving */
1810 static void
1811 move_view(struct view *view, enum request request)
1812 {
1813 int scroll_steps = 0;
1814 int steps;
1816 switch (request) {
1817 case REQ_MOVE_FIRST_LINE:
1818 steps = -view->lineno;
1819 break;
1821 case REQ_MOVE_LAST_LINE:
1822 steps = view->lines - view->lineno - 1;
1823 break;
1825 case REQ_MOVE_PAGE_UP:
1826 steps = view->height > view->lineno
1827 ? -view->lineno : -view->height;
1828 break;
1830 case REQ_MOVE_PAGE_DOWN:
1831 steps = view->lineno + view->height >= view->lines
1832 ? view->lines - view->lineno - 1 : view->height;
1833 break;
1835 case REQ_MOVE_UP:
1836 steps = -1;
1837 break;
1839 case REQ_MOVE_DOWN:
1840 steps = 1;
1841 break;
1843 default:
1844 die("request %d not handled in switch", request);
1845 }
1847 if (steps <= 0 && view->lineno == 0) {
1848 report("Cannot move beyond the first line");
1849 return;
1851 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1852 report("Cannot move beyond the last line");
1853 return;
1854 }
1856 /* Move the current line */
1857 view->lineno += steps;
1858 assert(0 <= view->lineno && view->lineno < view->lines);
1860 /* Check whether the view needs to be scrolled */
1861 if (view->lineno < view->offset ||
1862 view->lineno >= view->offset + view->height) {
1863 scroll_steps = steps;
1864 if (steps < 0 && -steps > view->offset) {
1865 scroll_steps = -view->offset;
1867 } else if (steps > 0) {
1868 if (view->lineno == view->lines - 1 &&
1869 view->lines > view->height) {
1870 scroll_steps = view->lines - view->offset - 1;
1871 if (scroll_steps >= view->height)
1872 scroll_steps -= view->height - 1;
1873 }
1874 }
1875 }
1877 if (!view_is_displayed(view)) {
1878 view->offset += scroll_steps;
1879 assert(0 <= view->offset && view->offset < view->lines);
1880 view->ops->select(view, &view->line[view->lineno]);
1881 return;
1882 }
1884 /* Repaint the old "current" line if we be scrolling */
1885 if (ABS(steps) < view->height)
1886 draw_view_line(view, view->lineno - steps - view->offset);
1888 if (scroll_steps) {
1889 do_scroll_view(view, scroll_steps);
1890 return;
1891 }
1893 /* Draw the current line */
1894 draw_view_line(view, view->lineno - view->offset);
1896 redrawwin(view->win);
1897 wrefresh(view->win);
1898 report("");
1899 }
1902 /*
1903 * Searching
1904 */
1906 static void search_view(struct view *view, enum request request);
1908 static bool
1909 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1910 {
1911 assert(view_is_displayed(view));
1913 if (!view->ops->grep(view, line))
1914 return FALSE;
1916 if (lineno - view->offset >= view->height) {
1917 view->offset = lineno;
1918 view->lineno = lineno;
1919 redraw_view(view);
1921 } else {
1922 unsigned long old_lineno = view->lineno - view->offset;
1924 view->lineno = lineno;
1925 draw_view_line(view, old_lineno);
1927 draw_view_line(view, view->lineno - view->offset);
1928 redrawwin(view->win);
1929 wrefresh(view->win);
1930 }
1932 report("Line %ld matches '%s'", lineno + 1, view->grep);
1933 return TRUE;
1934 }
1936 static void
1937 find_next(struct view *view, enum request request)
1938 {
1939 unsigned long lineno = view->lineno;
1940 int direction;
1942 if (!*view->grep) {
1943 if (!*opt_search)
1944 report("No previous search");
1945 else
1946 search_view(view, request);
1947 return;
1948 }
1950 switch (request) {
1951 case REQ_SEARCH:
1952 case REQ_FIND_NEXT:
1953 direction = 1;
1954 break;
1956 case REQ_SEARCH_BACK:
1957 case REQ_FIND_PREV:
1958 direction = -1;
1959 break;
1961 default:
1962 return;
1963 }
1965 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1966 lineno += direction;
1968 /* Note, lineno is unsigned long so will wrap around in which case it
1969 * will become bigger than view->lines. */
1970 for (; lineno < view->lines; lineno += direction) {
1971 struct line *line = &view->line[lineno];
1973 if (find_next_line(view, lineno, line))
1974 return;
1975 }
1977 report("No match found for '%s'", view->grep);
1978 }
1980 static void
1981 search_view(struct view *view, enum request request)
1982 {
1983 int regex_err;
1985 if (view->regex) {
1986 regfree(view->regex);
1987 *view->grep = 0;
1988 } else {
1989 view->regex = calloc(1, sizeof(*view->regex));
1990 if (!view->regex)
1991 return;
1992 }
1994 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1995 if (regex_err != 0) {
1996 char buf[SIZEOF_STR] = "unknown error";
1998 regerror(regex_err, view->regex, buf, sizeof(buf));
1999 report("Search failed: %s", buf);
2000 return;
2001 }
2003 string_copy(view->grep, opt_search);
2005 find_next(view, request);
2006 }
2008 /*
2009 * Incremental updating
2010 */
2012 static void
2013 end_update(struct view *view)
2014 {
2015 if (!view->pipe)
2016 return;
2017 set_nonblocking_input(FALSE);
2018 if (view->pipe == stdin)
2019 fclose(view->pipe);
2020 else
2021 pclose(view->pipe);
2022 view->pipe = NULL;
2023 }
2025 static bool
2026 begin_update(struct view *view)
2027 {
2028 if (view->pipe)
2029 end_update(view);
2031 if (opt_cmd[0]) {
2032 string_copy(view->cmd, opt_cmd);
2033 opt_cmd[0] = 0;
2034 /* When running random commands, initially show the
2035 * command in the title. However, it maybe later be
2036 * overwritten if a commit line is selected. */
2037 if (view == VIEW(REQ_VIEW_PAGER))
2038 string_copy(view->ref, view->cmd);
2039 else
2040 view->ref[0] = 0;
2042 } else if (view == VIEW(REQ_VIEW_TREE)) {
2043 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2044 char path[SIZEOF_STR];
2046 if (strcmp(view->vid, view->id))
2047 opt_path[0] = path[0] = 0;
2048 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
2049 return FALSE;
2051 if (!string_format(view->cmd, format, view->id, path))
2052 return FALSE;
2054 } else {
2055 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2056 const char *id = view->id;
2058 if (!string_format(view->cmd, format, id, id, id, id, id))
2059 return FALSE;
2061 /* Put the current ref_* value to the view title ref
2062 * member. This is needed by the blob view. Most other
2063 * views sets it automatically after loading because the
2064 * first line is a commit line. */
2065 string_copy_rev(view->ref, view->id);
2066 }
2068 /* Special case for the pager view. */
2069 if (opt_pipe) {
2070 view->pipe = opt_pipe;
2071 opt_pipe = NULL;
2072 } else {
2073 view->pipe = popen(view->cmd, "r");
2074 }
2076 if (!view->pipe)
2077 return FALSE;
2079 set_nonblocking_input(TRUE);
2081 view->offset = 0;
2082 view->lines = 0;
2083 view->lineno = 0;
2084 string_copy_rev(view->vid, view->id);
2086 if (view->line) {
2087 int i;
2089 for (i = 0; i < view->lines; i++)
2090 if (view->line[i].data)
2091 free(view->line[i].data);
2093 free(view->line);
2094 view->line = NULL;
2095 }
2097 view->start_time = time(NULL);
2099 return TRUE;
2100 }
2102 #define ITEM_CHUNK_SIZE 256
2103 static void *
2104 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2105 {
2106 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2107 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2109 if (mem == NULL || num_chunks != num_chunks_new) {
2110 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2111 mem = realloc(mem, *size * item_size);
2112 }
2114 return mem;
2115 }
2117 static struct line *
2118 realloc_lines(struct view *view, size_t line_size)
2119 {
2120 size_t alloc = view->line_alloc;
2121 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2122 sizeof(*view->line));
2124 if (!tmp)
2125 return NULL;
2127 view->line = tmp;
2128 view->line_alloc = alloc;
2129 view->line_size = line_size;
2130 return view->line;
2131 }
2133 static bool
2134 update_view(struct view *view)
2135 {
2136 char in_buffer[BUFSIZ];
2137 char out_buffer[BUFSIZ * 2];
2138 char *line;
2139 /* The number of lines to read. If too low it will cause too much
2140 * redrawing (and possible flickering), if too high responsiveness
2141 * will suffer. */
2142 unsigned long lines = view->height;
2143 int redraw_from = -1;
2145 if (!view->pipe)
2146 return TRUE;
2148 /* Only redraw if lines are visible. */
2149 if (view->offset + view->height >= view->lines)
2150 redraw_from = view->lines - view->offset;
2152 /* FIXME: This is probably not perfect for backgrounded views. */
2153 if (!realloc_lines(view, view->lines + lines))
2154 goto alloc_error;
2156 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
2157 size_t linelen = strlen(line);
2159 if (linelen)
2160 line[linelen - 1] = 0;
2162 if (opt_iconv != ICONV_NONE) {
2163 ICONV_CONST char *inbuf = line;
2164 size_t inlen = linelen;
2166 char *outbuf = out_buffer;
2167 size_t outlen = sizeof(out_buffer);
2169 size_t ret;
2171 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2172 if (ret != (size_t) -1) {
2173 line = out_buffer;
2174 linelen = strlen(out_buffer);
2175 }
2176 }
2178 if (!view->ops->read(view, line))
2179 goto alloc_error;
2181 if (lines-- == 1)
2182 break;
2183 }
2185 {
2186 int digits;
2188 lines = view->lines;
2189 for (digits = 0; lines; digits++)
2190 lines /= 10;
2192 /* Keep the displayed view in sync with line number scaling. */
2193 if (digits != view->digits) {
2194 view->digits = digits;
2195 redraw_from = 0;
2196 }
2197 }
2199 if (!view_is_displayed(view))
2200 goto check_pipe;
2202 if (view == VIEW(REQ_VIEW_TREE)) {
2203 /* Clear the view and redraw everything since the tree sorting
2204 * might have rearranged things. */
2205 redraw_view(view);
2207 } else if (redraw_from >= 0) {
2208 /* If this is an incremental update, redraw the previous line
2209 * since for commits some members could have changed when
2210 * loading the main view. */
2211 if (redraw_from > 0)
2212 redraw_from--;
2214 /* Since revision graph visualization requires knowledge
2215 * about the parent commit, it causes a further one-off
2216 * needed to be redrawn for incremental updates. */
2217 if (redraw_from > 0 && opt_rev_graph)
2218 redraw_from--;
2220 /* Incrementally draw avoids flickering. */
2221 redraw_view_from(view, redraw_from);
2222 }
2224 /* Update the title _after_ the redraw so that if the redraw picks up a
2225 * commit reference in view->ref it'll be available here. */
2226 update_view_title(view);
2228 check_pipe:
2229 if (ferror(view->pipe)) {
2230 report("Failed to read: %s", strerror(errno));
2231 goto end;
2233 } else if (feof(view->pipe)) {
2234 report("");
2235 goto end;
2236 }
2238 return TRUE;
2240 alloc_error:
2241 report("Allocation failure");
2243 end:
2244 view->ops->read(view, NULL);
2245 end_update(view);
2246 return FALSE;
2247 }
2249 static struct line *
2250 add_line_data(struct view *view, void *data, enum line_type type)
2251 {
2252 struct line *line = &view->line[view->lines++];
2254 memset(line, 0, sizeof(*line));
2255 line->type = type;
2256 line->data = data;
2258 return line;
2259 }
2261 static struct line *
2262 add_line_text(struct view *view, char *data, enum line_type type)
2263 {
2264 if (data)
2265 data = strdup(data);
2267 return data ? add_line_data(view, data, type) : NULL;
2268 }
2271 /*
2272 * View opening
2273 */
2275 enum open_flags {
2276 OPEN_DEFAULT = 0, /* Use default view switching. */
2277 OPEN_SPLIT = 1, /* Split current view. */
2278 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2279 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2280 };
2282 static void
2283 open_view(struct view *prev, enum request request, enum open_flags flags)
2284 {
2285 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2286 bool split = !!(flags & OPEN_SPLIT);
2287 bool reload = !!(flags & OPEN_RELOAD);
2288 struct view *view = VIEW(request);
2289 int nviews = displayed_views();
2290 struct view *base_view = display[0];
2292 if (view == prev && nviews == 1 && !reload) {
2293 report("Already in %s view", view->name);
2294 return;
2295 }
2297 if (view->ops->open) {
2298 if (!view->ops->open(view)) {
2299 report("Failed to load %s view", view->name);
2300 return;
2301 }
2303 } else if ((reload || strcmp(view->vid, view->id)) &&
2304 !begin_update(view)) {
2305 report("Failed to load %s view", view->name);
2306 return;
2307 }
2309 if (split) {
2310 display[1] = view;
2311 if (!backgrounded)
2312 current_view = 1;
2313 } else {
2314 /* Maximize the current view. */
2315 memset(display, 0, sizeof(display));
2316 current_view = 0;
2317 display[current_view] = view;
2318 }
2320 /* Resize the view when switching between split- and full-screen,
2321 * or when switching between two different full-screen views. */
2322 if (nviews != displayed_views() ||
2323 (nviews == 1 && base_view != display[0]))
2324 resize_display();
2326 if (split && prev->lineno - prev->offset >= prev->height) {
2327 /* Take the title line into account. */
2328 int lines = prev->lineno - prev->offset - prev->height + 1;
2330 /* Scroll the view that was split if the current line is
2331 * outside the new limited view. */
2332 do_scroll_view(prev, lines);
2333 }
2335 if (prev && view != prev) {
2336 if (split && !backgrounded) {
2337 /* "Blur" the previous view. */
2338 update_view_title(prev);
2339 }
2341 view->parent = prev;
2342 }
2344 if (view->pipe && view->lines == 0) {
2345 /* Clear the old view and let the incremental updating refill
2346 * the screen. */
2347 wclear(view->win);
2348 report("");
2349 } else {
2350 redraw_view(view);
2351 report("");
2352 }
2354 /* If the view is backgrounded the above calls to report()
2355 * won't redraw the view title. */
2356 if (backgrounded)
2357 update_view_title(view);
2358 }
2360 static void
2361 open_external_viewer(const char *cmd)
2362 {
2363 def_prog_mode(); /* save current tty modes */
2364 endwin(); /* restore original tty modes */
2365 system(cmd);
2366 fprintf(stderr, "Press Enter to continue");
2367 getc(stdin);
2368 reset_prog_mode();
2369 redraw_display();
2370 }
2372 static void
2373 open_mergetool(const char *file)
2374 {
2375 char cmd[SIZEOF_STR];
2376 char file_sq[SIZEOF_STR];
2378 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2379 string_format(cmd, "git mergetool %s", file_sq)) {
2380 open_external_viewer(cmd);
2381 }
2382 }
2384 static void
2385 open_editor(bool from_root, const char *file)
2386 {
2387 char cmd[SIZEOF_STR];
2388 char file_sq[SIZEOF_STR];
2389 char *editor;
2390 char *prefix = from_root ? opt_cdup : "";
2392 editor = getenv("GIT_EDITOR");
2393 if (!editor && *opt_editor)
2394 editor = opt_editor;
2395 if (!editor)
2396 editor = getenv("VISUAL");
2397 if (!editor)
2398 editor = getenv("EDITOR");
2399 if (!editor)
2400 editor = "vi";
2402 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2403 string_format(cmd, "%s %s%s", editor, prefix, file_sq)) {
2404 open_external_viewer(cmd);
2405 }
2406 }
2408 static void
2409 open_run_request(enum request request)
2410 {
2411 struct run_request *req = get_run_request(request);
2412 char buf[SIZEOF_STR * 2];
2413 size_t bufpos;
2414 char *cmd;
2416 if (!req) {
2417 report("Unknown run request");
2418 return;
2419 }
2421 bufpos = 0;
2422 cmd = req->cmd;
2424 while (cmd) {
2425 char *next = strstr(cmd, "%(");
2426 int len = next - cmd;
2427 char *value;
2429 if (!next) {
2430 len = strlen(cmd);
2431 value = "";
2433 } else if (!strncmp(next, "%(head)", 7)) {
2434 value = ref_head;
2436 } else if (!strncmp(next, "%(commit)", 9)) {
2437 value = ref_commit;
2439 } else if (!strncmp(next, "%(blob)", 7)) {
2440 value = ref_blob;
2442 } else {
2443 report("Unknown replacement in run request: `%s`", req->cmd);
2444 return;
2445 }
2447 if (!string_format_from(buf, &bufpos, "%.*s%s", len, cmd, value))
2448 return;
2450 if (next)
2451 next = strchr(next, ')') + 1;
2452 cmd = next;
2453 }
2455 open_external_viewer(buf);
2456 }
2458 /*
2459 * User request switch noodle
2460 */
2462 static int
2463 view_driver(struct view *view, enum request request)
2464 {
2465 int i;
2467 if (request == REQ_NONE) {
2468 doupdate();
2469 return TRUE;
2470 }
2472 if (request > REQ_NONE) {
2473 open_run_request(request);
2474 return TRUE;
2475 }
2477 if (view && view->lines) {
2478 request = view->ops->request(view, request, &view->line[view->lineno]);
2479 if (request == REQ_NONE)
2480 return TRUE;
2481 }
2483 switch (request) {
2484 case REQ_MOVE_UP:
2485 case REQ_MOVE_DOWN:
2486 case REQ_MOVE_PAGE_UP:
2487 case REQ_MOVE_PAGE_DOWN:
2488 case REQ_MOVE_FIRST_LINE:
2489 case REQ_MOVE_LAST_LINE:
2490 move_view(view, request);
2491 break;
2493 case REQ_SCROLL_LINE_DOWN:
2494 case REQ_SCROLL_LINE_UP:
2495 case REQ_SCROLL_PAGE_DOWN:
2496 case REQ_SCROLL_PAGE_UP:
2497 scroll_view(view, request);
2498 break;
2500 case REQ_VIEW_BLOB:
2501 if (!ref_blob[0]) {
2502 report("No file chosen, press %s to open tree view",
2503 get_key(REQ_VIEW_TREE));
2504 break;
2505 }
2506 open_view(view, request, OPEN_DEFAULT);
2507 break;
2509 case REQ_VIEW_PAGER:
2510 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2511 report("No pager content, press %s to run command from prompt",
2512 get_key(REQ_PROMPT));
2513 break;
2514 }
2515 open_view(view, request, OPEN_DEFAULT);
2516 break;
2518 case REQ_VIEW_STAGE:
2519 if (!VIEW(REQ_VIEW_STAGE)->lines) {
2520 report("No stage content, press %s to open the status view and choose file",
2521 get_key(REQ_VIEW_STATUS));
2522 break;
2523 }
2524 open_view(view, request, OPEN_DEFAULT);
2525 break;
2527 case REQ_VIEW_STATUS:
2528 if (opt_is_inside_work_tree == FALSE) {
2529 report("The status view requires a working tree");
2530 break;
2531 }
2532 open_view(view, request, OPEN_DEFAULT);
2533 break;
2535 case REQ_VIEW_MAIN:
2536 case REQ_VIEW_DIFF:
2537 case REQ_VIEW_LOG:
2538 case REQ_VIEW_TREE:
2539 case REQ_VIEW_HELP:
2540 open_view(view, request, OPEN_DEFAULT);
2541 break;
2543 case REQ_NEXT:
2544 case REQ_PREVIOUS:
2545 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2547 if ((view == VIEW(REQ_VIEW_DIFF) &&
2548 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2549 (view == VIEW(REQ_VIEW_STAGE) &&
2550 view->parent == VIEW(REQ_VIEW_STATUS)) ||
2551 (view == VIEW(REQ_VIEW_BLOB) &&
2552 view->parent == VIEW(REQ_VIEW_TREE))) {
2553 int line;
2555 view = view->parent;
2556 line = view->lineno;
2557 move_view(view, request);
2558 if (view_is_displayed(view))
2559 update_view_title(view);
2560 if (line != view->lineno)
2561 view->ops->request(view, REQ_ENTER,
2562 &view->line[view->lineno]);
2564 } else {
2565 move_view(view, request);
2566 }
2567 break;
2569 case REQ_VIEW_NEXT:
2570 {
2571 int nviews = displayed_views();
2572 int next_view = (current_view + 1) % nviews;
2574 if (next_view == current_view) {
2575 report("Only one view is displayed");
2576 break;
2577 }
2579 current_view = next_view;
2580 /* Blur out the title of the previous view. */
2581 update_view_title(view);
2582 report("");
2583 break;
2584 }
2585 case REQ_REFRESH:
2586 report("Refreshing is not yet supported for the %s view", view->name);
2587 break;
2589 case REQ_TOGGLE_LINENO:
2590 opt_line_number = !opt_line_number;
2591 redraw_display();
2592 break;
2594 case REQ_TOGGLE_DATE:
2595 opt_date = !opt_date;
2596 redraw_display();
2597 break;
2599 case REQ_TOGGLE_AUTHOR:
2600 opt_author = !opt_author;
2601 redraw_display();
2602 break;
2604 case REQ_TOGGLE_REV_GRAPH:
2605 opt_rev_graph = !opt_rev_graph;
2606 redraw_display();
2607 break;
2609 case REQ_TOGGLE_REFS:
2610 opt_show_refs = !opt_show_refs;
2611 redraw_display();
2612 break;
2614 case REQ_PROMPT:
2615 /* Always reload^Wrerun commands from the prompt. */
2616 open_view(view, opt_request, OPEN_RELOAD);
2617 break;
2619 case REQ_SEARCH:
2620 case REQ_SEARCH_BACK:
2621 search_view(view, request);
2622 break;
2624 case REQ_FIND_NEXT:
2625 case REQ_FIND_PREV:
2626 find_next(view, request);
2627 break;
2629 case REQ_STOP_LOADING:
2630 for (i = 0; i < ARRAY_SIZE(views); i++) {
2631 view = &views[i];
2632 if (view->pipe)
2633 report("Stopped loading the %s view", view->name),
2634 end_update(view);
2635 }
2636 break;
2638 case REQ_SHOW_VERSION:
2639 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
2640 return TRUE;
2642 case REQ_SCREEN_RESIZE:
2643 resize_display();
2644 /* Fall-through */
2645 case REQ_SCREEN_REDRAW:
2646 redraw_display();
2647 break;
2649 case REQ_EDIT:
2650 report("Nothing to edit");
2651 break;
2654 case REQ_ENTER:
2655 report("Nothing to enter");
2656 break;
2659 case REQ_VIEW_CLOSE:
2660 /* XXX: Mark closed views by letting view->parent point to the
2661 * view itself. Parents to closed view should never be
2662 * followed. */
2663 if (view->parent &&
2664 view->parent->parent != view->parent) {
2665 memset(display, 0, sizeof(display));
2666 current_view = 0;
2667 display[current_view] = view->parent;
2668 view->parent = view;
2669 resize_display();
2670 redraw_display();
2671 break;
2672 }
2673 /* Fall-through */
2674 case REQ_QUIT:
2675 return FALSE;
2677 default:
2678 /* An unknown key will show most commonly used commands. */
2679 report("Unknown key, press 'h' for help");
2680 return TRUE;
2681 }
2683 return TRUE;
2684 }
2687 /*
2688 * Pager backend
2689 */
2691 static bool
2692 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2693 {
2694 char *text = line->data;
2695 enum line_type type = line->type;
2696 int attr;
2698 wmove(view->win, lineno, 0);
2700 if (selected) {
2701 type = LINE_CURSOR;
2702 wchgat(view->win, -1, 0, type, NULL);
2703 }
2705 attr = get_line_attr(type);
2706 wattrset(view->win, attr);
2708 if (opt_line_number || opt_tab_size < TABSIZE) {
2709 static char spaces[] = " ";
2710 int col_offset = 0, col = 0;
2712 if (opt_line_number) {
2713 unsigned long real_lineno = view->offset + lineno + 1;
2715 if (real_lineno == 1 ||
2716 (real_lineno % opt_num_interval) == 0) {
2717 wprintw(view->win, "%.*d", view->digits, real_lineno);
2719 } else {
2720 waddnstr(view->win, spaces,
2721 MIN(view->digits, STRING_SIZE(spaces)));
2722 }
2723 waddstr(view->win, ": ");
2724 col_offset = view->digits + 2;
2725 }
2727 while (text && col_offset + col < view->width) {
2728 int cols_max = view->width - col_offset - col;
2729 char *pos = text;
2730 int cols;
2732 if (*text == '\t') {
2733 text++;
2734 assert(sizeof(spaces) > TABSIZE);
2735 pos = spaces;
2736 cols = opt_tab_size - (col % opt_tab_size);
2738 } else {
2739 text = strchr(text, '\t');
2740 cols = line ? text - pos : strlen(pos);
2741 }
2743 waddnstr(view->win, pos, MIN(cols, cols_max));
2744 col += cols;
2745 }
2747 } else {
2748 int tilde_attr = get_line_attr(LINE_MAIN_DELIM);
2750 draw_text(view, text, view->width, 0, TRUE, tilde_attr);
2751 }
2753 return TRUE;
2754 }
2756 static bool
2757 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2758 {
2759 char refbuf[SIZEOF_STR];
2760 char *ref = NULL;
2761 FILE *pipe;
2763 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2764 return TRUE;
2766 pipe = popen(refbuf, "r");
2767 if (!pipe)
2768 return TRUE;
2770 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2771 ref = chomp_string(ref);
2772 pclose(pipe);
2774 if (!ref || !*ref)
2775 return TRUE;
2777 /* This is the only fatal call, since it can "corrupt" the buffer. */
2778 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2779 return FALSE;
2781 return TRUE;
2782 }
2784 static void
2785 add_pager_refs(struct view *view, struct line *line)
2786 {
2787 char buf[SIZEOF_STR];
2788 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
2789 struct ref **refs;
2790 size_t bufpos = 0, refpos = 0;
2791 const char *sep = "Refs: ";
2792 bool is_tag = FALSE;
2794 assert(line->type == LINE_COMMIT);
2796 refs = get_refs(commit_id);
2797 if (!refs) {
2798 if (view == VIEW(REQ_VIEW_DIFF))
2799 goto try_add_describe_ref;
2800 return;
2801 }
2803 do {
2804 struct ref *ref = refs[refpos];
2805 char *fmt = ref->tag ? "%s[%s]" :
2806 ref->remote ? "%s<%s>" : "%s%s";
2808 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2809 return;
2810 sep = ", ";
2811 if (ref->tag)
2812 is_tag = TRUE;
2813 } while (refs[refpos++]->next);
2815 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2816 try_add_describe_ref:
2817 /* Add <tag>-g<commit_id> "fake" reference. */
2818 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2819 return;
2820 }
2822 if (bufpos == 0)
2823 return;
2825 if (!realloc_lines(view, view->line_size + 1))
2826 return;
2828 add_line_text(view, buf, LINE_PP_REFS);
2829 }
2831 static bool
2832 pager_read(struct view *view, char *data)
2833 {
2834 struct line *line;
2836 if (!data)
2837 return TRUE;
2839 line = add_line_text(view, data, get_line_type(data));
2840 if (!line)
2841 return FALSE;
2843 if (line->type == LINE_COMMIT &&
2844 (view == VIEW(REQ_VIEW_DIFF) ||
2845 view == VIEW(REQ_VIEW_LOG)))
2846 add_pager_refs(view, line);
2848 return TRUE;
2849 }
2851 static enum request
2852 pager_request(struct view *view, enum request request, struct line *line)
2853 {
2854 int split = 0;
2856 if (request != REQ_ENTER)
2857 return request;
2859 if (line->type == LINE_COMMIT &&
2860 (view == VIEW(REQ_VIEW_LOG) ||
2861 view == VIEW(REQ_VIEW_PAGER))) {
2862 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2863 split = 1;
2864 }
2866 /* Always scroll the view even if it was split. That way
2867 * you can use Enter to scroll through the log view and
2868 * split open each commit diff. */
2869 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2871 /* FIXME: A minor workaround. Scrolling the view will call report("")
2872 * but if we are scrolling a non-current view this won't properly
2873 * update the view title. */
2874 if (split)
2875 update_view_title(view);
2877 return REQ_NONE;
2878 }
2880 static bool
2881 pager_grep(struct view *view, struct line *line)
2882 {
2883 regmatch_t pmatch;
2884 char *text = line->data;
2886 if (!*text)
2887 return FALSE;
2889 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2890 return FALSE;
2892 return TRUE;
2893 }
2895 static void
2896 pager_select(struct view *view, struct line *line)
2897 {
2898 if (line->type == LINE_COMMIT) {
2899 char *text = (char *)line->data + STRING_SIZE("commit ");
2901 if (view != VIEW(REQ_VIEW_PAGER))
2902 string_copy_rev(view->ref, text);
2903 string_copy_rev(ref_commit, text);
2904 }
2905 }
2907 static struct view_ops pager_ops = {
2908 "line",
2909 NULL,
2910 pager_read,
2911 pager_draw,
2912 pager_request,
2913 pager_grep,
2914 pager_select,
2915 };
2918 /*
2919 * Help backend
2920 */
2922 static bool
2923 help_open(struct view *view)
2924 {
2925 char buf[BUFSIZ];
2926 int lines = ARRAY_SIZE(req_info) + 2;
2927 int i;
2929 if (view->lines > 0)
2930 return TRUE;
2932 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2933 if (!req_info[i].request)
2934 lines++;
2936 lines += run_requests + 1;
2938 view->line = calloc(lines, sizeof(*view->line));
2939 if (!view->line)
2940 return FALSE;
2942 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2944 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2945 char *key;
2947 if (req_info[i].request == REQ_NONE)
2948 continue;
2950 if (!req_info[i].request) {
2951 add_line_text(view, "", LINE_DEFAULT);
2952 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2953 continue;
2954 }
2956 key = get_key(req_info[i].request);
2957 if (!*key)
2958 key = "(no key defined)";
2960 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2961 continue;
2963 add_line_text(view, buf, LINE_DEFAULT);
2964 }
2966 if (run_requests) {
2967 add_line_text(view, "", LINE_DEFAULT);
2968 add_line_text(view, "External commands:", LINE_DEFAULT);
2969 }
2971 for (i = 0; i < run_requests; i++) {
2972 struct run_request *req = get_run_request(REQ_NONE + i + 1);
2973 char *key;
2975 if (!req)
2976 continue;
2978 key = get_key_name(req->key);
2979 if (!*key)
2980 key = "(no key defined)";
2982 if (!string_format(buf, " %-10s %-14s `%s`",
2983 keymap_table[req->keymap].name,
2984 key, req->cmd))
2985 continue;
2987 add_line_text(view, buf, LINE_DEFAULT);
2988 }
2990 return TRUE;
2991 }
2993 static struct view_ops help_ops = {
2994 "line",
2995 help_open,
2996 NULL,
2997 pager_draw,
2998 pager_request,
2999 pager_grep,
3000 pager_select,
3001 };
3004 /*
3005 * Tree backend
3006 */
3008 struct tree_stack_entry {
3009 struct tree_stack_entry *prev; /* Entry below this in the stack */
3010 unsigned long lineno; /* Line number to restore */
3011 char *name; /* Position of name in opt_path */
3012 };
3014 /* The top of the path stack. */
3015 static struct tree_stack_entry *tree_stack = NULL;
3016 unsigned long tree_lineno = 0;
3018 static void
3019 pop_tree_stack_entry(void)
3020 {
3021 struct tree_stack_entry *entry = tree_stack;
3023 tree_lineno = entry->lineno;
3024 entry->name[0] = 0;
3025 tree_stack = entry->prev;
3026 free(entry);
3027 }
3029 static void
3030 push_tree_stack_entry(char *name, unsigned long lineno)
3031 {
3032 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3033 size_t pathlen = strlen(opt_path);
3035 if (!entry)
3036 return;
3038 entry->prev = tree_stack;
3039 entry->name = opt_path + pathlen;
3040 tree_stack = entry;
3042 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3043 pop_tree_stack_entry();
3044 return;
3045 }
3047 /* Move the current line to the first tree entry. */
3048 tree_lineno = 1;
3049 entry->lineno = lineno;
3050 }
3052 /* Parse output from git-ls-tree(1):
3053 *
3054 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
3055 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
3056 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3057 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
3058 */
3060 #define SIZEOF_TREE_ATTR \
3061 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
3063 #define TREE_UP_FORMAT "040000 tree %s\t.."
3065 static int
3066 tree_compare_entry(enum line_type type1, char *name1,
3067 enum line_type type2, char *name2)
3068 {
3069 if (type1 != type2) {
3070 if (type1 == LINE_TREE_DIR)
3071 return -1;
3072 return 1;
3073 }
3075 return strcmp(name1, name2);
3076 }
3078 static bool
3079 tree_read(struct view *view, char *text)
3080 {
3081 size_t textlen = text ? strlen(text) : 0;
3082 char buf[SIZEOF_STR];
3083 unsigned long pos;
3084 enum line_type type;
3085 bool first_read = view->lines == 0;
3087 if (textlen <= SIZEOF_TREE_ATTR)
3088 return FALSE;
3090 type = text[STRING_SIZE("100644 ")] == 't'
3091 ? LINE_TREE_DIR : LINE_TREE_FILE;
3093 if (first_read) {
3094 /* Add path info line */
3095 if (!string_format(buf, "Directory path /%s", opt_path) ||
3096 !realloc_lines(view, view->line_size + 1) ||
3097 !add_line_text(view, buf, LINE_DEFAULT))
3098 return FALSE;
3100 /* Insert "link" to parent directory. */
3101 if (*opt_path) {
3102 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
3103 !realloc_lines(view, view->line_size + 1) ||
3104 !add_line_text(view, buf, LINE_TREE_DIR))
3105 return FALSE;
3106 }
3107 }
3109 /* Strip the path part ... */
3110 if (*opt_path) {
3111 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3112 size_t striplen = strlen(opt_path);
3113 char *path = text + SIZEOF_TREE_ATTR;
3115 if (pathlen > striplen)
3116 memmove(path, path + striplen,
3117 pathlen - striplen + 1);
3118 }
3120 /* Skip "Directory ..." and ".." line. */
3121 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
3122 struct line *line = &view->line[pos];
3123 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
3124 char *path2 = text + SIZEOF_TREE_ATTR;
3125 int cmp = tree_compare_entry(line->type, path1, type, path2);
3127 if (cmp <= 0)
3128 continue;
3130 text = strdup(text);
3131 if (!text)
3132 return FALSE;
3134 if (view->lines > pos)
3135 memmove(&view->line[pos + 1], &view->line[pos],
3136 (view->lines - pos) * sizeof(*line));
3138 line = &view->line[pos];
3139 line->data = text;
3140 line->type = type;
3141 view->lines++;
3142 return TRUE;
3143 }
3145 if (!add_line_text(view, text, type))
3146 return FALSE;
3148 if (tree_lineno > view->lineno) {
3149 view->lineno = tree_lineno;
3150 tree_lineno = 0;
3151 }
3153 return TRUE;
3154 }
3156 static enum request
3157 tree_request(struct view *view, enum request request, struct line *line)
3158 {
3159 enum open_flags flags;
3161 if (request == REQ_TREE_PARENT) {
3162 if (*opt_path) {
3163 /* fake 'cd ..' */
3164 request = REQ_ENTER;
3165 line = &view->line[1];
3166 } else {
3167 /* quit view if at top of tree */
3168 return REQ_VIEW_CLOSE;
3169 }
3170 }
3171 if (request != REQ_ENTER)
3172 return request;
3174 /* Cleanup the stack if the tree view is at a different tree. */
3175 while (!*opt_path && tree_stack)
3176 pop_tree_stack_entry();
3178 switch (line->type) {
3179 case LINE_TREE_DIR:
3180 /* Depending on whether it is a subdir or parent (updir?) link
3181 * mangle the path buffer. */
3182 if (line == &view->line[1] && *opt_path) {
3183 pop_tree_stack_entry();
3185 } else {
3186 char *data = line->data;
3187 char *basename = data + SIZEOF_TREE_ATTR;
3189 push_tree_stack_entry(basename, view->lineno);
3190 }
3192 /* Trees and subtrees share the same ID, so they are not not
3193 * unique like blobs. */
3194 flags = OPEN_RELOAD;
3195 request = REQ_VIEW_TREE;
3196 break;
3198 case LINE_TREE_FILE:
3199 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3200 request = REQ_VIEW_BLOB;
3201 break;
3203 default:
3204 return TRUE;
3205 }
3207 open_view(view, request, flags);
3208 if (request == REQ_VIEW_TREE) {
3209 view->lineno = tree_lineno;
3210 }
3212 return REQ_NONE;
3213 }
3215 static void
3216 tree_select(struct view *view, struct line *line)
3217 {
3218 char *text = (char *)line->data + STRING_SIZE("100644 blob ");
3220 if (line->type == LINE_TREE_FILE) {
3221 string_copy_rev(ref_blob, text);
3223 } else if (line->type != LINE_TREE_DIR) {
3224 return;
3225 }
3227 string_copy_rev(view->ref, text);
3228 }
3230 static struct view_ops tree_ops = {
3231 "file",
3232 NULL,
3233 tree_read,
3234 pager_draw,
3235 tree_request,
3236 pager_grep,
3237 tree_select,
3238 };
3240 static bool
3241 blob_read(struct view *view, char *line)
3242 {
3243 return add_line_text(view, line, LINE_DEFAULT) != NULL;
3244 }
3246 static struct view_ops blob_ops = {
3247 "line",
3248 NULL,
3249 blob_read,
3250 pager_draw,
3251 pager_request,
3252 pager_grep,
3253 pager_select,
3254 };
3257 /*
3258 * Status backend
3259 */
3261 struct status {
3262 char status;
3263 struct {
3264 mode_t mode;
3265 char rev[SIZEOF_REV];
3266 char name[SIZEOF_STR];
3267 } old;
3268 struct {
3269 mode_t mode;
3270 char rev[SIZEOF_REV];
3271 char name[SIZEOF_STR];
3272 } new;
3273 };
3275 static struct status stage_status;
3276 static enum line_type stage_line_type;
3278 /* Get fields from the diff line:
3279 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
3280 */
3281 static inline bool
3282 status_get_diff(struct status *file, char *buf, size_t bufsize)
3283 {
3284 char *old_mode = buf + 1;
3285 char *new_mode = buf + 8;
3286 char *old_rev = buf + 15;
3287 char *new_rev = buf + 56;
3288 char *status = buf + 97;
3290 if (bufsize < 99 ||
3291 old_mode[-1] != ':' ||
3292 new_mode[-1] != ' ' ||
3293 old_rev[-1] != ' ' ||
3294 new_rev[-1] != ' ' ||
3295 status[-1] != ' ')
3296 return FALSE;
3298 file->status = *status;
3300 string_copy_rev(file->old.rev, old_rev);
3301 string_copy_rev(file->new.rev, new_rev);
3303 file->old.mode = strtoul(old_mode, NULL, 8);
3304 file->new.mode = strtoul(new_mode, NULL, 8);
3306 file->old.name[0] = file->new.name[0] = 0;
3308 return TRUE;
3309 }
3311 static bool
3312 status_run(struct view *view, const char cmd[], bool diff, enum line_type type)
3313 {
3314 struct status *file = NULL;
3315 struct status *unmerged = NULL;
3316 char buf[SIZEOF_STR * 4];
3317 size_t bufsize = 0;
3318 FILE *pipe;
3320 pipe = popen(cmd, "r");
3321 if (!pipe)
3322 return FALSE;
3324 add_line_data(view, NULL, type);
3326 while (!feof(pipe) && !ferror(pipe)) {
3327 char *sep;
3328 size_t readsize;
3330 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
3331 if (!readsize)
3332 break;
3333 bufsize += readsize;
3335 /* Process while we have NUL chars. */
3336 while ((sep = memchr(buf, 0, bufsize))) {
3337 size_t sepsize = sep - buf + 1;
3339 if (!file) {
3340 if (!realloc_lines(view, view->line_size + 1))
3341 goto error_out;
3343 file = calloc(1, sizeof(*file));
3344 if (!file)
3345 goto error_out;
3347 add_line_data(view, file, type);
3348 }
3350 /* Parse diff info part. */
3351 if (!diff) {
3352 file->status = '?';
3354 } else if (!file->status) {
3355 if (!status_get_diff(file, buf, sepsize))
3356 goto error_out;
3358 bufsize -= sepsize;
3359 memmove(buf, sep + 1, bufsize);
3361 sep = memchr(buf, 0, bufsize);
3362 if (!sep)
3363 break;
3364 sepsize = sep - buf + 1;
3366 /* Collapse all 'M'odified entries that
3367 * follow a associated 'U'nmerged entry.
3368 */
3369 if (file->status == 'U') {
3370 unmerged = file;
3372 } else if (unmerged) {
3373 int collapse = !strcmp(buf, unmerged->new.name);
3375 unmerged = NULL;
3376 if (collapse) {
3377 free(file);
3378 view->lines--;
3379 continue;
3380 }
3381 }
3382 }
3384 /* Grab the old name for rename/copy. */
3385 if (!*file->old.name &&
3386 (file->status == 'R' || file->status == 'C')) {
3387 sepsize = sep - buf + 1;
3388 string_ncopy(file->old.name, buf, sepsize);
3389 bufsize -= sepsize;
3390 memmove(buf, sep + 1, bufsize);
3392 sep = memchr(buf, 0, bufsize);
3393 if (!sep)
3394 break;
3395 sepsize = sep - buf + 1;
3396 }
3398 /* git-ls-files just delivers a NUL separated
3399 * list of file names similar to the second half
3400 * of the git-diff-* output. */
3401 string_ncopy(file->new.name, buf, sepsize);
3402 if (!*file->old.name)
3403 string_copy(file->old.name, file->new.name);
3404 bufsize -= sepsize;
3405 memmove(buf, sep + 1, bufsize);
3406 file = NULL;
3407 }
3408 }
3410 if (ferror(pipe)) {
3411 error_out:
3412 pclose(pipe);
3413 return FALSE;
3414 }
3416 if (!view->line[view->lines - 1].data)
3417 add_line_data(view, NULL, LINE_STAT_NONE);
3419 pclose(pipe);
3420 return TRUE;
3421 }
3423 /* Don't show unmerged entries in the staged section. */
3424 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --diff-filter=ACDMRTXB --cached -M HEAD"
3425 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
3426 #define STATUS_LIST_OTHER_CMD \
3427 "git ls-files -z --others --exclude-per-directory=.gitignore"
3429 #define STATUS_DIFF_INDEX_SHOW_CMD \
3430 "git diff-index --root --patch-with-stat -C -M --cached HEAD -- %s %s 2>/dev/null"
3432 #define STATUS_DIFF_FILES_SHOW_CMD \
3433 "git diff-files --root --patch-with-stat -C -M -- %s %s 2>/dev/null"
3435 /* First parse staged info using git-diff-index(1), then parse unstaged
3436 * info using git-diff-files(1), and finally untracked files using
3437 * git-ls-files(1). */
3438 static bool
3439 status_open(struct view *view)
3440 {
3441 struct stat statbuf;
3442 char exclude[SIZEOF_STR];
3443 char cmd[SIZEOF_STR];
3444 unsigned long prev_lineno = view->lineno;
3445 size_t i;
3447 for (i = 0; i < view->lines; i++)
3448 free(view->line[i].data);
3449 free(view->line);
3450 view->lines = view->line_alloc = view->line_size = view->lineno = 0;
3451 view->line = NULL;
3453 if (!realloc_lines(view, view->line_size + 6))
3454 return FALSE;
3456 if (!string_format(exclude, "%s/info/exclude", opt_git_dir))
3457 return FALSE;
3459 string_copy(cmd, STATUS_LIST_OTHER_CMD);
3461 if (stat(exclude, &statbuf) >= 0) {
3462 size_t cmdsize = strlen(cmd);
3464 if (!string_format_from(cmd, &cmdsize, " %s", "--exclude-from=") ||
3465 sq_quote(cmd, cmdsize, exclude) >= sizeof(cmd))
3466 return FALSE;
3467 }
3469 system("git update-index -q --refresh");
3471 if (!status_run(view, STATUS_DIFF_INDEX_CMD, TRUE, LINE_STAT_STAGED) ||
3472 !status_run(view, STATUS_DIFF_FILES_CMD, TRUE, LINE_STAT_UNSTAGED) ||
3473 !status_run(view, cmd, FALSE, LINE_STAT_UNTRACKED))
3474 return FALSE;
3476 /* If all went well restore the previous line number to stay in
3477 * the context. */
3478 if (prev_lineno < view->lines)
3479 view->lineno = prev_lineno;
3480 else
3481 view->lineno = view->lines - 1;
3483 return TRUE;
3484 }
3486 static bool
3487 status_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3488 {
3489 struct status *status = line->data;
3490 int tilde_attr = get_line_attr(LINE_MAIN_DELIM);
3492 wmove(view->win, lineno, 0);
3494 if (selected) {
3495 wattrset(view->win, get_line_attr(LINE_CURSOR));
3496 wchgat(view->win, -1, 0, LINE_CURSOR, NULL);
3497 tilde_attr = -1;
3499 } else if (!status && line->type != LINE_STAT_NONE) {
3500 wattrset(view->win, get_line_attr(LINE_STAT_SECTION));
3501 wchgat(view->win, -1, 0, LINE_STAT_SECTION, NULL);
3503 } else {
3504 wattrset(view->win, get_line_attr(line->type));
3505 }
3507 if (!status) {
3508 char *text;
3510 switch (line->type) {
3511 case LINE_STAT_STAGED:
3512 text = "Changes to be committed:";
3513 break;
3515 case LINE_STAT_UNSTAGED:
3516 text = "Changed but not updated:";
3517 break;
3519 case LINE_STAT_UNTRACKED:
3520 text = "Untracked files:";
3521 break;
3523 case LINE_STAT_NONE:
3524 text = " (no files)";
3525 break;
3527 default:
3528 return FALSE;
3529 }
3531 draw_text(view, text, view->width, 0, TRUE, tilde_attr);
3532 return TRUE;
3533 }
3535 waddch(view->win, status->status);
3536 if (!selected)
3537 wattrset(view->win, A_NORMAL);
3538 wmove(view->win, lineno, 4);
3539 if (view->width < 5)
3540 return TRUE;
3542 draw_text(view, status->new.name, view->width - 5, 5, TRUE, tilde_attr);
3543 return TRUE;
3544 }
3546 static enum request
3547 status_enter(struct view *view, struct line *line)
3548 {
3549 struct status *status = line->data;
3550 char oldpath[SIZEOF_STR] = "";
3551 char newpath[SIZEOF_STR] = "";
3552 char *info;
3553 size_t cmdsize = 0;
3555 if (line->type == LINE_STAT_NONE ||
3556 (!status && line[1].type == LINE_STAT_NONE)) {
3557 report("No file to diff");
3558 return REQ_NONE;
3559 }
3561 if (status) {
3562 if (sq_quote(oldpath, 0, status->old.name) >= sizeof(oldpath))
3563 return REQ_QUIT;
3564 /* Diffs for unmerged entries are empty when pasing the
3565 * new path, so leave it empty. */
3566 if (status->status != 'U' &&
3567 sq_quote(newpath, 0, status->new.name) >= sizeof(newpath))
3568 return REQ_QUIT;
3569 }
3571 if (opt_cdup[0] &&
3572 line->type != LINE_STAT_UNTRACKED &&
3573 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
3574 return REQ_QUIT;
3576 switch (line->type) {
3577 case LINE_STAT_STAGED:
3578 if (!string_format_from(opt_cmd, &cmdsize,
3579 STATUS_DIFF_INDEX_SHOW_CMD, oldpath, newpath))
3580 return REQ_QUIT;
3581 if (status)
3582 info = "Staged changes to %s";
3583 else
3584 info = "Staged changes";
3585 break;
3587 case LINE_STAT_UNSTAGED:
3588 if (!string_format_from(opt_cmd, &cmdsize,
3589 STATUS_DIFF_FILES_SHOW_CMD, oldpath, newpath))
3590 return REQ_QUIT;
3591 if (status)
3592 info = "Unstaged changes to %s";
3593 else
3594 info = "Unstaged changes";
3595 break;
3597 case LINE_STAT_UNTRACKED:
3598 if (opt_pipe)
3599 return REQ_QUIT;
3602 if (!status) {
3603 report("No file to show");
3604 return REQ_NONE;
3605 }
3607 opt_pipe = fopen(status->new.name, "r");
3608 info = "Untracked file %s";
3609 break;
3611 default:
3612 die("line type %d not handled in switch", line->type);
3613 }
3615 open_view(view, REQ_VIEW_STAGE, OPEN_RELOAD | OPEN_SPLIT);
3616 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
3617 if (status) {
3618 stage_status = *status;
3619 } else {
3620 memset(&stage_status, 0, sizeof(stage_status));
3621 }
3623 stage_line_type = line->type;
3624 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
3625 }
3627 return REQ_NONE;
3628 }
3631 static bool
3632 status_update_file(struct view *view, struct status *status, enum line_type type)
3633 {
3634 char cmd[SIZEOF_STR];
3635 char buf[SIZEOF_STR];
3636 size_t cmdsize = 0;
3637 size_t bufsize = 0;
3638 size_t written = 0;
3639 FILE *pipe;
3641 if (opt_cdup[0] &&
3642 type != LINE_STAT_UNTRACKED &&
3643 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3644 return FALSE;
3646 switch (type) {
3647 case LINE_STAT_STAGED:
3648 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
3649 status->old.mode,
3650 status->old.rev,
3651 status->old.name, 0))
3652 return FALSE;
3654 string_add(cmd, cmdsize, "git update-index -z --index-info");
3655 break;
3657 case LINE_STAT_UNSTAGED:
3658 case LINE_STAT_UNTRACKED:
3659 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
3660 return FALSE;
3662 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
3663 break;
3665 default:
3666 die("line type %d not handled in switch", type);
3667 }
3669 pipe = popen(cmd, "w");
3670 if (!pipe)
3671 return FALSE;
3673 while (!ferror(pipe) && written < bufsize) {
3674 written += fwrite(buf + written, 1, bufsize - written, pipe);
3675 }
3677 pclose(pipe);
3679 if (written != bufsize)
3680 return FALSE;
3682 return TRUE;
3683 }
3685 static void
3686 status_update(struct view *view)
3687 {
3688 struct line *line = &view->line[view->lineno];
3690 assert(view->lines);
3692 if (!line->data) {
3693 while (++line < view->line + view->lines && line->data) {
3694 if (!status_update_file(view, line->data, line->type))
3695 report("Failed to update file status");
3696 }
3698 if (!line[-1].data) {
3699 report("Nothing to update");
3700 return;
3701 }
3703 } else if (!status_update_file(view, line->data, line->type)) {
3704 report("Failed to update file status");
3705 }
3706 }
3708 static enum request
3709 status_request(struct view *view, enum request request, struct line *line)
3710 {
3711 struct status *status = line->data;
3713 switch (request) {
3714 case REQ_STATUS_UPDATE:
3715 status_update(view);
3716 break;
3718 case REQ_STATUS_MERGE:
3719 if (!status || status->status != 'U') {
3720 report("Merging only possible for files with unmerged status ('U').");
3721 return REQ_NONE;
3722 }
3723 open_mergetool(status->new.name);
3724 break;
3726 case REQ_EDIT:
3727 if (!status)
3728 return request;
3730 open_editor(status->status != '?', status->new.name);
3731 break;
3733 case REQ_ENTER:
3734 /* After returning the status view has been split to
3735 * show the stage view. No further reloading is
3736 * necessary. */
3737 status_enter(view, line);
3738 return REQ_NONE;
3740 case REQ_REFRESH:
3741 /* Simply reload the view. */
3742 break;
3744 default:
3745 return request;
3746 }
3748 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3750 return REQ_NONE;
3751 }
3753 static void
3754 status_select(struct view *view, struct line *line)
3755 {
3756 struct status *status = line->data;
3757 char file[SIZEOF_STR] = "all files";
3758 char *text;
3759 char *key;
3761 if (status && !string_format(file, "'%s'", status->new.name))
3762 return;
3764 if (!status && line[1].type == LINE_STAT_NONE)
3765 line++;
3767 switch (line->type) {
3768 case LINE_STAT_STAGED:
3769 text = "Press %s to unstage %s for commit";
3770 break;
3772 case LINE_STAT_UNSTAGED:
3773 text = "Press %s to stage %s for commit";
3774 break;
3776 case LINE_STAT_UNTRACKED:
3777 text = "Press %s to stage %s for addition";
3778 break;
3780 case LINE_STAT_NONE:
3781 text = "Nothing to update";
3782 break;
3784 default:
3785 die("line type %d not handled in switch", line->type);
3786 }
3788 if (status && status->status == 'U') {
3789 text = "Press %s to resolve conflict in %s";
3790 key = get_key(REQ_STATUS_MERGE);
3792 } else {
3793 key = get_key(REQ_STATUS_UPDATE);
3794 }
3796 string_format(view->ref, text, key, file);
3797 }
3799 static bool
3800 status_grep(struct view *view, struct line *line)
3801 {
3802 struct status *status = line->data;
3803 enum { S_STATUS, S_NAME, S_END } state;
3804 char buf[2] = "?";
3805 regmatch_t pmatch;
3807 if (!status)
3808 return FALSE;
3810 for (state = S_STATUS; state < S_END; state++) {
3811 char *text;
3813 switch (state) {
3814 case S_NAME: text = status->new.name; break;
3815 case S_STATUS:
3816 buf[0] = status->status;
3817 text = buf;
3818 break;
3820 default:
3821 return FALSE;
3822 }
3824 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3825 return TRUE;
3826 }
3828 return FALSE;
3829 }
3831 static struct view_ops status_ops = {
3832 "file",
3833 status_open,
3834 NULL,
3835 status_draw,
3836 status_request,
3837 status_grep,
3838 status_select,
3839 };
3842 static bool
3843 stage_diff_line(FILE *pipe, struct line *line)
3844 {
3845 char *buf = line->data;
3846 size_t bufsize = strlen(buf);
3847 size_t written = 0;
3849 while (!ferror(pipe) && written < bufsize) {
3850 written += fwrite(buf + written, 1, bufsize - written, pipe);
3851 }
3853 fputc('\n', pipe);
3855 return written == bufsize;
3856 }
3858 static struct line *
3859 stage_diff_hdr(struct view *view, struct line *line)
3860 {
3861 int diff_hdr_dir = line->type == LINE_DIFF_CHUNK ? -1 : 1;
3862 struct line *diff_hdr;
3864 if (line->type == LINE_DIFF_CHUNK)
3865 diff_hdr = line - 1;
3866 else
3867 diff_hdr = view->line + 1;
3869 while (diff_hdr > view->line && diff_hdr < view->line + view->lines) {
3870 if (diff_hdr->type == LINE_DIFF_HEADER)
3871 return diff_hdr;
3873 diff_hdr += diff_hdr_dir;
3874 }
3876 return NULL;
3877 }
3879 static bool
3880 stage_update_chunk(struct view *view, struct line *line)
3881 {
3882 char cmd[SIZEOF_STR];
3883 size_t cmdsize = 0;
3884 struct line *diff_hdr, *diff_chunk, *diff_end;
3885 FILE *pipe;
3887 diff_hdr = stage_diff_hdr(view, line);
3888 if (!diff_hdr)
3889 return FALSE;
3891 if (opt_cdup[0] &&
3892 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3893 return FALSE;
3895 if (!string_format_from(cmd, &cmdsize,
3896 "git apply --cached %s - && "
3897 "git update-index -q --unmerged --refresh 2>/dev/null",
3898 stage_line_type == LINE_STAT_STAGED ? "-R" : ""))
3899 return FALSE;
3901 pipe = popen(cmd, "w");
3902 if (!pipe)
3903 return FALSE;
3905 diff_end = view->line + view->lines;
3906 if (line->type != LINE_DIFF_CHUNK) {
3907 diff_chunk = diff_hdr;
3909 } else {
3910 for (diff_chunk = line + 1; diff_chunk < diff_end; diff_chunk++)
3911 if (diff_chunk->type == LINE_DIFF_CHUNK ||
3912 diff_chunk->type == LINE_DIFF_HEADER)
3913 diff_end = diff_chunk;
3915 diff_chunk = line;
3917 while (diff_hdr->type != LINE_DIFF_CHUNK) {
3918 switch (diff_hdr->type) {
3919 case LINE_DIFF_HEADER:
3920 case LINE_DIFF_INDEX:
3921 case LINE_DIFF_ADD:
3922 case LINE_DIFF_DEL:
3923 break;
3925 default:
3926 diff_hdr++;
3927 continue;
3928 }
3930 if (!stage_diff_line(pipe, diff_hdr++)) {
3931 pclose(pipe);
3932 return FALSE;
3933 }
3934 }
3935 }
3937 while (diff_chunk < diff_end && stage_diff_line(pipe, diff_chunk))
3938 diff_chunk++;
3940 pclose(pipe);
3942 if (diff_chunk != diff_end)
3943 return FALSE;
3945 return TRUE;
3946 }
3948 static void
3949 stage_update(struct view *view, struct line *line)
3950 {
3951 if (stage_line_type != LINE_STAT_UNTRACKED &&
3952 (line->type == LINE_DIFF_CHUNK || !stage_status.status)) {
3953 if (!stage_update_chunk(view, line)) {
3954 report("Failed to apply chunk");
3955 return;
3956 }
3958 } else if (!status_update_file(view, &stage_status, stage_line_type)) {
3959 report("Failed to update file");
3960 return;
3961 }
3963 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3965 view = VIEW(REQ_VIEW_STATUS);
3966 if (view_is_displayed(view))
3967 status_enter(view, &view->line[view->lineno]);
3968 }
3970 static enum request
3971 stage_request(struct view *view, enum request request, struct line *line)
3972 {
3973 switch (request) {
3974 case REQ_STATUS_UPDATE:
3975 stage_update(view, line);
3976 break;
3978 case REQ_EDIT:
3979 if (!stage_status.new.name[0])
3980 return request;
3982 open_editor(stage_status.status != '?', stage_status.new.name);
3983 break;
3985 case REQ_ENTER:
3986 pager_request(view, request, line);
3987 break;
3989 default:
3990 return request;
3991 }
3993 return REQ_NONE;
3994 }
3996 static struct view_ops stage_ops = {
3997 "line",
3998 NULL,
3999 pager_read,
4000 pager_draw,
4001 stage_request,
4002 pager_grep,
4003 pager_select,
4004 };
4007 /*
4008 * Revision graph
4009 */
4011 struct commit {
4012 char id[SIZEOF_REV]; /* SHA1 ID. */
4013 char title[128]; /* First line of the commit message. */
4014 char author[75]; /* Author of the commit. */
4015 struct tm time; /* Date from the author ident. */
4016 struct ref **refs; /* Repository references. */
4017 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
4018 size_t graph_size; /* The width of the graph array. */
4019 bool has_parents; /* Rewritten --parents seen. */
4020 };
4022 /* Size of rev graph with no "padding" columns */
4023 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
4025 struct rev_graph {
4026 struct rev_graph *prev, *next, *parents;
4027 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
4028 size_t size;
4029 struct commit *commit;
4030 size_t pos;
4031 unsigned int boundary:1;
4032 };
4034 /* Parents of the commit being visualized. */
4035 static struct rev_graph graph_parents[4];
4037 /* The current stack of revisions on the graph. */
4038 static struct rev_graph graph_stacks[4] = {
4039 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
4040 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
4041 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
4042 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
4043 };
4045 static inline bool
4046 graph_parent_is_merge(struct rev_graph *graph)
4047 {
4048 return graph->parents->size > 1;
4049 }
4051 static inline void
4052 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
4053 {
4054 struct commit *commit = graph->commit;
4056 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
4057 commit->graph[commit->graph_size++] = symbol;
4058 }
4060 static void
4061 done_rev_graph(struct rev_graph *graph)
4062 {
4063 if (graph_parent_is_merge(graph) &&
4064 graph->pos < graph->size - 1 &&
4065 graph->next->size == graph->size + graph->parents->size - 1) {
4066 size_t i = graph->pos + graph->parents->size - 1;
4068 graph->commit->graph_size = i * 2;
4069 while (i < graph->next->size - 1) {
4070 append_to_rev_graph(graph, ' ');
4071 append_to_rev_graph(graph, '\\');
4072 i++;
4073 }
4074 }
4076 graph->size = graph->pos = 0;
4077 graph->commit = NULL;
4078 memset(graph->parents, 0, sizeof(*graph->parents));
4079 }
4081 static void
4082 push_rev_graph(struct rev_graph *graph, char *parent)
4083 {
4084 int i;
4086 /* "Collapse" duplicate parents lines.
4087 *
4088 * FIXME: This needs to also update update the drawn graph but
4089 * for now it just serves as a method for pruning graph lines. */
4090 for (i = 0; i < graph->size; i++)
4091 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
4092 return;
4094 if (graph->size < SIZEOF_REVITEMS) {
4095 string_copy_rev(graph->rev[graph->size++], parent);
4096 }
4097 }
4099 static chtype
4100 get_rev_graph_symbol(struct rev_graph *graph)
4101 {
4102 chtype symbol;
4104 if (graph->boundary)
4105 symbol = REVGRAPH_BOUND;
4106 else if (graph->parents->size == 0)
4107 symbol = REVGRAPH_INIT;
4108 else if (graph_parent_is_merge(graph))
4109 symbol = REVGRAPH_MERGE;
4110 else if (graph->pos >= graph->size)
4111 symbol = REVGRAPH_BRANCH;
4112 else
4113 symbol = REVGRAPH_COMMIT;
4115 return symbol;
4116 }
4118 static void
4119 draw_rev_graph(struct rev_graph *graph)
4120 {
4121 struct rev_filler {
4122 chtype separator, line;
4123 };
4124 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
4125 static struct rev_filler fillers[] = {
4126 { ' ', REVGRAPH_LINE },
4127 { '`', '.' },
4128 { '\'', ' ' },
4129 { '/', ' ' },
4130 };
4131 chtype symbol = get_rev_graph_symbol(graph);
4132 struct rev_filler *filler;
4133 size_t i;
4135 filler = &fillers[DEFAULT];
4137 for (i = 0; i < graph->pos; i++) {
4138 append_to_rev_graph(graph, filler->line);
4139 if (graph_parent_is_merge(graph->prev) &&
4140 graph->prev->pos == i)
4141 filler = &fillers[RSHARP];
4143 append_to_rev_graph(graph, filler->separator);
4144 }
4146 /* Place the symbol for this revision. */
4147 append_to_rev_graph(graph, symbol);
4149 if (graph->prev->size > graph->size)
4150 filler = &fillers[RDIAG];
4151 else
4152 filler = &fillers[DEFAULT];
4154 i++;
4156 for (; i < graph->size; i++) {
4157 append_to_rev_graph(graph, filler->separator);
4158 append_to_rev_graph(graph, filler->line);
4159 if (graph_parent_is_merge(graph->prev) &&
4160 i < graph->prev->pos + graph->parents->size)
4161 filler = &fillers[RSHARP];
4162 if (graph->prev->size > graph->size)
4163 filler = &fillers[LDIAG];
4164 }
4166 if (graph->prev->size > graph->size) {
4167 append_to_rev_graph(graph, filler->separator);
4168 if (filler->line != ' ')
4169 append_to_rev_graph(graph, filler->line);
4170 }
4171 }
4173 /* Prepare the next rev graph */
4174 static void
4175 prepare_rev_graph(struct rev_graph *graph)
4176 {
4177 size_t i;
4179 /* First, traverse all lines of revisions up to the active one. */
4180 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
4181 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
4182 break;
4184 push_rev_graph(graph->next, graph->rev[graph->pos]);
4185 }
4187 /* Interleave the new revision parent(s). */
4188 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
4189 push_rev_graph(graph->next, graph->parents->rev[i]);
4191 /* Lastly, put any remaining revisions. */
4192 for (i = graph->pos + 1; i < graph->size; i++)
4193 push_rev_graph(graph->next, graph->rev[i]);
4194 }
4196 static void
4197 update_rev_graph(struct rev_graph *graph)
4198 {
4199 /* If this is the finalizing update ... */
4200 if (graph->commit)
4201 prepare_rev_graph(graph);
4203 /* Graph visualization needs a one rev look-ahead,
4204 * so the first update doesn't visualize anything. */
4205 if (!graph->prev->commit)
4206 return;
4208 draw_rev_graph(graph->prev);
4209 done_rev_graph(graph->prev->prev);
4210 }
4213 /*
4214 * Main view backend
4215 */
4217 static bool
4218 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
4219 {
4220 char buf[DATE_COLS + 1];
4221 struct commit *commit = line->data;
4222 enum line_type type;
4223 int col = 0;
4224 size_t timelen;
4225 int tilde_attr;
4226 int space;
4228 if (!*commit->author)
4229 return FALSE;
4231 space = view->width;
4232 wmove(view->win, lineno, col);
4234 if (selected) {
4235 type = LINE_CURSOR;
4236 wattrset(view->win, get_line_attr(type));
4237 wchgat(view->win, -1, 0, type, NULL);
4238 tilde_attr = -1;
4239 } else {
4240 type = LINE_MAIN_COMMIT;
4241 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
4242 tilde_attr = get_line_attr(LINE_MAIN_DELIM);
4243 }
4245 if (opt_date) {
4246 int n;
4248 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
4249 n = draw_text(
4250 view, buf, view->width - col, col, FALSE, tilde_attr);
4251 draw_text(
4252 view, " ", view->width - col - n, col + n, FALSE,
4253 tilde_attr);
4255 col += DATE_COLS;
4256 wmove(view->win, lineno, col);
4257 if (col >= view->width)
4258 return TRUE;
4259 }
4260 if (type != LINE_CURSOR)
4261 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
4263 if (opt_author) {
4264 int max_len;
4266 max_len = view->width - col;
4267 if (max_len > AUTHOR_COLS - 1)
4268 max_len = AUTHOR_COLS - 1;
4269 draw_text(
4270 view, commit->author, max_len, col, TRUE, tilde_attr);
4271 col += AUTHOR_COLS;
4272 if (col >= view->width)
4273 return TRUE;
4274 }
4276 if (opt_rev_graph && commit->graph_size) {
4277 size_t graph_size = view->width - col;
4278 size_t i;
4280 if (type != LINE_CURSOR)
4281 wattrset(view->win, get_line_attr(LINE_MAIN_REVGRAPH));
4282 wmove(view->win, lineno, col);
4283 if (graph_size > commit->graph_size)
4284 graph_size = commit->graph_size;
4285 /* Using waddch() instead of waddnstr() ensures that
4286 * they'll be rendered correctly for the cursor line. */
4287 for (i = 0; i < graph_size; i++)
4288 waddch(view->win, commit->graph[i]);
4290 col += commit->graph_size + 1;
4291 if (col >= view->width)
4292 return TRUE;
4293 waddch(view->win, ' ');
4294 }
4295 if (type != LINE_CURSOR)
4296 wattrset(view->win, A_NORMAL);
4298 wmove(view->win, lineno, col);
4300 if (opt_show_refs && commit->refs) {
4301 size_t i = 0;
4303 do {
4304 if (type == LINE_CURSOR)
4305 ;
4306 else if (commit->refs[i]->ltag)
4307 wattrset(view->win, get_line_attr(LINE_MAIN_LOCAL_TAG));
4308 else if (commit->refs[i]->tag)
4309 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
4310 else if (commit->refs[i]->remote)
4311 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
4312 else
4313 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
4315 col += draw_text(
4316 view, "[", view->width - col, col, TRUE,
4317 tilde_attr);
4318 col += draw_text(
4319 view, commit->refs[i]->name, view->width - col,
4320 col, TRUE, tilde_attr);
4321 col += draw_text(
4322 view, "]", view->width - col, col, TRUE,
4323 tilde_attr);
4324 if (type != LINE_CURSOR)
4325 wattrset(view->win, A_NORMAL);
4326 col += draw_text(
4327 view, " ", view->width - col, col, TRUE,
4328 tilde_attr);
4329 if (col >= view->width)
4330 return TRUE;
4331 } while (commit->refs[i++]->next);
4332 }
4334 if (type != LINE_CURSOR)
4335 wattrset(view->win, get_line_attr(type));
4337 col += draw_text(
4338 view, commit->title, view->width - col, col, TRUE, tilde_attr);
4340 return TRUE;
4341 }
4343 /* Reads git log --pretty=raw output and parses it into the commit struct. */
4344 static bool
4345 main_read(struct view *view, char *line)
4346 {
4347 static struct rev_graph *graph = graph_stacks;
4348 enum line_type type;
4349 struct commit *commit;
4351 if (!line) {
4352 update_rev_graph(graph);
4353 return TRUE;
4354 }
4356 type = get_line_type(line);
4357 if (type == LINE_COMMIT) {
4358 commit = calloc(1, sizeof(struct commit));
4359 if (!commit)
4360 return FALSE;
4362 line += STRING_SIZE("commit ");
4363 if (*line == '-') {
4364 graph->boundary = 1;
4365 line++;
4366 }
4368 string_copy_rev(commit->id, line);
4369 commit->refs = get_refs(commit->id);
4370 graph->commit = commit;
4371 add_line_data(view, commit, LINE_MAIN_COMMIT);
4373 while ((line = strchr(line, ' '))) {
4374 line++;
4375 push_rev_graph(graph->parents, line);
4376 commit->has_parents = TRUE;
4377 }
4378 return TRUE;
4379 }
4381 if (!view->lines)
4382 return TRUE;
4383 commit = view->line[view->lines - 1].data;
4385 switch (type) {
4386 case LINE_PARENT:
4387 if (commit->has_parents)
4388 break;
4389 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
4390 break;
4392 case LINE_AUTHOR:
4393 {
4394 /* Parse author lines where the name may be empty:
4395 * author <email@address.tld> 1138474660 +0100
4396 */
4397 char *ident = line + STRING_SIZE("author ");
4398 char *nameend = strchr(ident, '<');
4399 char *emailend = strchr(ident, '>');
4401 if (!nameend || !emailend)
4402 break;
4404 update_rev_graph(graph);
4405 graph = graph->next;
4407 *nameend = *emailend = 0;
4408 ident = chomp_string(ident);
4409 if (!*ident) {
4410 ident = chomp_string(nameend + 1);
4411 if (!*ident)
4412 ident = "Unknown";
4413 }
4415 string_ncopy(commit->author, ident, strlen(ident));
4417 /* Parse epoch and timezone */
4418 if (emailend[1] == ' ') {
4419 char *secs = emailend + 2;
4420 char *zone = strchr(secs, ' ');
4421 time_t time = (time_t) atol(secs);
4423 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
4424 long tz;
4426 zone++;
4427 tz = ('0' - zone[1]) * 60 * 60 * 10;
4428 tz += ('0' - zone[2]) * 60 * 60;
4429 tz += ('0' - zone[3]) * 60;
4430 tz += ('0' - zone[4]) * 60;
4432 if (zone[0] == '-')
4433 tz = -tz;
4435 time -= tz;
4436 }
4438 gmtime_r(&time, &commit->time);
4439 }
4440 break;
4441 }
4442 default:
4443 /* Fill in the commit title if it has not already been set. */
4444 if (commit->title[0])
4445 break;
4447 /* Require titles to start with a non-space character at the
4448 * offset used by git log. */
4449 if (strncmp(line, " ", 4))
4450 break;
4451 line += 4;
4452 /* Well, if the title starts with a whitespace character,
4453 * try to be forgiving. Otherwise we end up with no title. */
4454 while (isspace(*line))
4455 line++;
4456 if (*line == '\0')
4457 break;
4458 /* FIXME: More graceful handling of titles; append "..." to
4459 * shortened titles, etc. */
4461 string_ncopy(commit->title, line, strlen(line));
4462 }
4464 return TRUE;
4465 }
4467 static enum request
4468 main_request(struct view *view, enum request request, struct line *line)
4469 {
4470 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
4472 if (request == REQ_ENTER)
4473 open_view(view, REQ_VIEW_DIFF, flags);
4474 else
4475 return request;
4477 return REQ_NONE;
4478 }
4480 static bool
4481 main_grep(struct view *view, struct line *line)
4482 {
4483 struct commit *commit = line->data;
4484 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
4485 char buf[DATE_COLS + 1];
4486 regmatch_t pmatch;
4488 for (state = S_TITLE; state < S_END; state++) {
4489 char *text;
4491 switch (state) {
4492 case S_TITLE: text = commit->title; break;
4493 case S_AUTHOR: text = commit->author; break;
4494 case S_DATE:
4495 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
4496 continue;
4497 text = buf;
4498 break;
4500 default:
4501 return FALSE;
4502 }
4504 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4505 return TRUE;
4506 }
4508 return FALSE;
4509 }
4511 static void
4512 main_select(struct view *view, struct line *line)
4513 {
4514 struct commit *commit = line->data;
4516 string_copy_rev(view->ref, commit->id);
4517 string_copy_rev(ref_commit, view->ref);
4518 }
4520 static struct view_ops main_ops = {
4521 "commit",
4522 NULL,
4523 main_read,
4524 main_draw,
4525 main_request,
4526 main_grep,
4527 main_select,
4528 };
4531 /*
4532 * Unicode / UTF-8 handling
4533 *
4534 * NOTE: Much of the following code for dealing with unicode is derived from
4535 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
4536 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
4537 */
4539 /* I've (over)annotated a lot of code snippets because I am not entirely
4540 * confident that the approach taken by this small UTF-8 interface is correct.
4541 * --jonas */
4543 static inline int
4544 unicode_width(unsigned long c)
4545 {
4546 if (c >= 0x1100 &&
4547 (c <= 0x115f /* Hangul Jamo */
4548 || c == 0x2329
4549 || c == 0x232a
4550 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
4551 /* CJK ... Yi */
4552 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
4553 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
4554 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
4555 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
4556 || (c >= 0xffe0 && c <= 0xffe6)
4557 || (c >= 0x20000 && c <= 0x2fffd)
4558 || (c >= 0x30000 && c <= 0x3fffd)))
4559 return 2;
4561 if (c == '\t')
4562 return opt_tab_size;
4564 return 1;
4565 }
4567 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
4568 * Illegal bytes are set one. */
4569 static const unsigned char utf8_bytes[256] = {
4570 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,
4571 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,
4572 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,
4573 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,
4574 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,
4575 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,
4576 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,
4577 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,
4578 };
4580 /* Decode UTF-8 multi-byte representation into a unicode character. */
4581 static inline unsigned long
4582 utf8_to_unicode(const char *string, size_t length)
4583 {
4584 unsigned long unicode;
4586 switch (length) {
4587 case 1:
4588 unicode = string[0];
4589 break;
4590 case 2:
4591 unicode = (string[0] & 0x1f) << 6;
4592 unicode += (string[1] & 0x3f);
4593 break;
4594 case 3:
4595 unicode = (string[0] & 0x0f) << 12;
4596 unicode += ((string[1] & 0x3f) << 6);
4597 unicode += (string[2] & 0x3f);
4598 break;
4599 case 4:
4600 unicode = (string[0] & 0x0f) << 18;
4601 unicode += ((string[1] & 0x3f) << 12);
4602 unicode += ((string[2] & 0x3f) << 6);
4603 unicode += (string[3] & 0x3f);
4604 break;
4605 case 5:
4606 unicode = (string[0] & 0x0f) << 24;
4607 unicode += ((string[1] & 0x3f) << 18);
4608 unicode += ((string[2] & 0x3f) << 12);
4609 unicode += ((string[3] & 0x3f) << 6);
4610 unicode += (string[4] & 0x3f);
4611 break;
4612 case 6:
4613 unicode = (string[0] & 0x01) << 30;
4614 unicode += ((string[1] & 0x3f) << 24);
4615 unicode += ((string[2] & 0x3f) << 18);
4616 unicode += ((string[3] & 0x3f) << 12);
4617 unicode += ((string[4] & 0x3f) << 6);
4618 unicode += (string[5] & 0x3f);
4619 break;
4620 default:
4621 die("Invalid unicode length");
4622 }
4624 /* Invalid characters could return the special 0xfffd value but NUL
4625 * should be just as good. */
4626 return unicode > 0xffff ? 0 : unicode;
4627 }
4629 /* Calculates how much of string can be shown within the given maximum width
4630 * and sets trimmed parameter to non-zero value if all of string could not be
4631 * shown. If the reserve flag is TRUE, it will reserve at least one
4632 * trailing character, which can be useful when drawing a delimiter.
4633 *
4634 * Returns the number of bytes to output from string to satisfy max_width. */
4635 static size_t
4636 utf8_length(const char *string, size_t max_width, int *trimmed, bool reserve)
4637 {
4638 const char *start = string;
4639 const char *end = strchr(string, '\0');
4640 unsigned char last_bytes = 0;
4641 size_t width = 0;
4643 *trimmed = 0;
4645 while (string < end) {
4646 int c = *(unsigned char *) string;
4647 unsigned char bytes = utf8_bytes[c];
4648 size_t ucwidth;
4649 unsigned long unicode;
4651 if (string + bytes > end)
4652 break;
4654 /* Change representation to figure out whether
4655 * it is a single- or double-width character. */
4657 unicode = utf8_to_unicode(string, bytes);
4658 /* FIXME: Graceful handling of invalid unicode character. */
4659 if (!unicode)
4660 break;
4662 ucwidth = unicode_width(unicode);
4663 width += ucwidth;
4664 if (width > max_width) {
4665 *trimmed = 1;
4666 if (reserve && width - ucwidth == max_width) {
4667 string -= last_bytes;
4668 }
4669 break;
4670 }
4672 string += bytes;
4673 last_bytes = bytes;
4674 }
4676 return string - start;
4677 }
4680 /*
4681 * Status management
4682 */
4684 /* Whether or not the curses interface has been initialized. */
4685 static bool cursed = FALSE;
4687 /* The status window is used for polling keystrokes. */
4688 static WINDOW *status_win;
4690 static bool status_empty = TRUE;
4692 /* Update status and title window. */
4693 static void
4694 report(const char *msg, ...)
4695 {
4696 struct view *view = display[current_view];
4698 if (input_mode)
4699 return;
4701 if (!view) {
4702 char buf[SIZEOF_STR];
4703 va_list args;
4705 va_start(args, msg);
4706 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
4707 buf[sizeof(buf) - 1] = 0;
4708 buf[sizeof(buf) - 2] = '.';
4709 buf[sizeof(buf) - 3] = '.';
4710 buf[sizeof(buf) - 4] = '.';
4711 }
4712 va_end(args);
4713 die("%s", buf);
4714 }
4716 if (!status_empty || *msg) {
4717 va_list args;
4719 va_start(args, msg);
4721 wmove(status_win, 0, 0);
4722 if (*msg) {
4723 vwprintw(status_win, msg, args);
4724 status_empty = FALSE;
4725 } else {
4726 status_empty = TRUE;
4727 }
4728 wclrtoeol(status_win);
4729 wrefresh(status_win);
4731 va_end(args);
4732 }
4734 update_view_title(view);
4735 update_display_cursor(view);
4736 }
4738 /* Controls when nodelay should be in effect when polling user input. */
4739 static void
4740 set_nonblocking_input(bool loading)
4741 {
4742 static unsigned int loading_views;
4744 if ((loading == FALSE && loading_views-- == 1) ||
4745 (loading == TRUE && loading_views++ == 0))
4746 nodelay(status_win, loading);
4747 }
4749 static void
4750 init_display(void)
4751 {
4752 int x, y;
4754 /* Initialize the curses library */
4755 if (isatty(STDIN_FILENO)) {
4756 cursed = !!initscr();
4757 } else {
4758 /* Leave stdin and stdout alone when acting as a pager. */
4759 FILE *io = fopen("/dev/tty", "r+");
4761 if (!io)
4762 die("Failed to open /dev/tty");
4763 cursed = !!newterm(NULL, io, io);
4764 }
4766 if (!cursed)
4767 die("Failed to initialize curses");
4769 nonl(); /* Tell curses not to do NL->CR/NL on output */
4770 cbreak(); /* Take input chars one at a time, no wait for \n */
4771 noecho(); /* Don't echo input */
4772 leaveok(stdscr, TRUE);
4774 if (has_colors())
4775 init_colors();
4777 getmaxyx(stdscr, y, x);
4778 status_win = newwin(1, 0, y - 1, 0);
4779 if (!status_win)
4780 die("Failed to create status window");
4782 /* Enable keyboard mapping */
4783 keypad(status_win, TRUE);
4784 wbkgdset(status_win, get_line_attr(LINE_STATUS));
4785 }
4787 static char *
4788 read_prompt(const char *prompt)
4789 {
4790 enum { READING, STOP, CANCEL } status = READING;
4791 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
4792 int pos = 0;
4794 while (status == READING) {
4795 struct view *view;
4796 int i, key;
4798 input_mode = TRUE;
4800 foreach_view (view, i)
4801 update_view(view);
4803 input_mode = FALSE;
4805 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
4806 wclrtoeol(status_win);
4808 /* Refresh, accept single keystroke of input */
4809 key = wgetch(status_win);
4810 switch (key) {
4811 case KEY_RETURN:
4812 case KEY_ENTER:
4813 case '\n':
4814 status = pos ? STOP : CANCEL;
4815 break;
4817 case KEY_BACKSPACE:
4818 if (pos > 0)
4819 pos--;
4820 else
4821 status = CANCEL;
4822 break;
4824 case KEY_ESC:
4825 status = CANCEL;
4826 break;
4828 case ERR:
4829 break;
4831 default:
4832 if (pos >= sizeof(buf)) {
4833 report("Input string too long");
4834 return NULL;
4835 }
4837 if (isprint(key))
4838 buf[pos++] = (char) key;
4839 }
4840 }
4842 /* Clear the status window */
4843 status_empty = FALSE;
4844 report("");
4846 if (status == CANCEL)
4847 return NULL;
4849 buf[pos++] = 0;
4851 return buf;
4852 }
4854 /*
4855 * Repository references
4856 */
4858 static struct ref *refs = NULL;
4859 static size_t refs_alloc = 0;
4860 static size_t refs_size = 0;
4862 /* Id <-> ref store */
4863 static struct ref ***id_refs = NULL;
4864 static size_t id_refs_alloc = 0;
4865 static size_t id_refs_size = 0;
4867 static struct ref **
4868 get_refs(char *id)
4869 {
4870 struct ref ***tmp_id_refs;
4871 struct ref **ref_list = NULL;
4872 size_t ref_list_alloc = 0;
4873 size_t ref_list_size = 0;
4874 size_t i;
4876 for (i = 0; i < id_refs_size; i++)
4877 if (!strcmp(id, id_refs[i][0]->id))
4878 return id_refs[i];
4880 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
4881 sizeof(*id_refs));
4882 if (!tmp_id_refs)
4883 return NULL;
4885 id_refs = tmp_id_refs;
4887 for (i = 0; i < refs_size; i++) {
4888 struct ref **tmp;
4890 if (strcmp(id, refs[i].id))
4891 continue;
4893 tmp = realloc_items(ref_list, &ref_list_alloc,
4894 ref_list_size + 1, sizeof(*ref_list));
4895 if (!tmp) {
4896 if (ref_list)
4897 free(ref_list);
4898 return NULL;
4899 }
4901 ref_list = tmp;
4902 if (ref_list_size > 0)
4903 ref_list[ref_list_size - 1]->next = 1;
4904 ref_list[ref_list_size] = &refs[i];
4906 /* XXX: The properties of the commit chains ensures that we can
4907 * safely modify the shared ref. The repo references will
4908 * always be similar for the same id. */
4909 ref_list[ref_list_size]->next = 0;
4910 ref_list_size++;
4911 }
4913 if (ref_list)
4914 id_refs[id_refs_size++] = ref_list;
4916 return ref_list;
4917 }
4919 static int
4920 read_ref(char *id, size_t idlen, char *name, size_t namelen)
4921 {
4922 struct ref *ref;
4923 bool tag = FALSE;
4924 bool ltag = FALSE;
4925 bool remote = FALSE;
4926 bool check_replace = FALSE;
4928 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
4929 if (!strcmp(name + namelen - 3, "^{}")) {
4930 namelen -= 3;
4931 name[namelen] = 0;
4932 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
4933 check_replace = TRUE;
4934 } else {
4935 ltag = TRUE;
4936 }
4938 tag = TRUE;
4939 namelen -= STRING_SIZE("refs/tags/");
4940 name += STRING_SIZE("refs/tags/");
4942 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
4943 remote = TRUE;
4944 namelen -= STRING_SIZE("refs/remotes/");
4945 name += STRING_SIZE("refs/remotes/");
4947 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
4948 namelen -= STRING_SIZE("refs/heads/");
4949 name += STRING_SIZE("refs/heads/");
4951 } else if (!strcmp(name, "HEAD")) {
4952 return OK;
4953 }
4955 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
4956 /* it's an annotated tag, replace the previous sha1 with the
4957 * resolved commit id; relies on the fact git-ls-remote lists
4958 * the commit id of an annotated tag right beofre the commit id
4959 * it points to. */
4960 refs[refs_size - 1].ltag = ltag;
4961 string_copy_rev(refs[refs_size - 1].id, id);
4963 return OK;
4964 }
4965 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
4966 if (!refs)
4967 return ERR;
4969 ref = &refs[refs_size++];
4970 ref->name = malloc(namelen + 1);
4971 if (!ref->name)
4972 return ERR;
4974 strncpy(ref->name, name, namelen);
4975 ref->name[namelen] = 0;
4976 ref->tag = tag;
4977 ref->ltag = ltag;
4978 ref->remote = remote;
4979 string_copy_rev(ref->id, id);
4981 return OK;
4982 }
4984 static int
4985 load_refs(void)
4986 {
4987 const char *cmd_env = getenv("TIG_LS_REMOTE");
4988 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
4990 return read_properties(popen(cmd, "r"), "\t", read_ref);
4991 }
4993 static int
4994 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
4995 {
4996 if (!strcmp(name, "i18n.commitencoding"))
4997 string_ncopy(opt_encoding, value, valuelen);
4999 if (!strcmp(name, "core.editor"))
5000 string_ncopy(opt_editor, value, valuelen);
5002 return OK;
5003 }
5005 static int
5006 load_repo_config(void)
5007 {
5008 return read_properties(popen(GIT_CONFIG " --list", "r"),
5009 "=", read_repo_config_option);
5010 }
5012 static int
5013 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
5014 {
5015 if (!opt_git_dir[0]) {
5016 string_ncopy(opt_git_dir, name, namelen);
5018 } else if (opt_is_inside_work_tree == -1) {
5019 /* This can be 3 different values depending on the
5020 * version of git being used. If git-rev-parse does not
5021 * understand --is-inside-work-tree it will simply echo
5022 * the option else either "true" or "false" is printed.
5023 * Default to true for the unknown case. */
5024 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
5026 } else {
5027 string_ncopy(opt_cdup, name, namelen);
5028 }
5030 return OK;
5031 }
5033 /* XXX: The line outputted by "--show-cdup" can be empty so the option
5034 * must be the last one! */
5035 static int
5036 load_repo_info(void)
5037 {
5038 return read_properties(popen("git rev-parse --git-dir --is-inside-work-tree --show-cdup 2>/dev/null", "r"),
5039 "=", read_repo_info);
5040 }
5042 static int
5043 read_properties(FILE *pipe, const char *separators,
5044 int (*read_property)(char *, size_t, char *, size_t))
5045 {
5046 char buffer[BUFSIZ];
5047 char *name;
5048 int state = OK;
5050 if (!pipe)
5051 return ERR;
5053 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
5054 char *value;
5055 size_t namelen;
5056 size_t valuelen;
5058 name = chomp_string(name);
5059 namelen = strcspn(name, separators);
5061 if (name[namelen]) {
5062 name[namelen] = 0;
5063 value = chomp_string(name + namelen + 1);
5064 valuelen = strlen(value);
5066 } else {
5067 value = "";
5068 valuelen = 0;
5069 }
5071 state = read_property(name, namelen, value, valuelen);
5072 }
5074 if (state != ERR && ferror(pipe))
5075 state = ERR;
5077 pclose(pipe);
5079 return state;
5080 }
5083 /*
5084 * Main
5085 */
5087 static void __NORETURN
5088 quit(int sig)
5089 {
5090 /* XXX: Restore tty modes and let the OS cleanup the rest! */
5091 if (cursed)
5092 endwin();
5093 exit(0);
5094 }
5096 static void __NORETURN
5097 die(const char *err, ...)
5098 {
5099 va_list args;
5101 endwin();
5103 va_start(args, err);
5104 fputs("tig: ", stderr);
5105 vfprintf(stderr, err, args);
5106 fputs("\n", stderr);
5107 va_end(args);
5109 exit(1);
5110 }
5112 static void
5113 warn(const char *msg, ...)
5114 {
5115 va_list args;
5117 va_start(args, msg);
5118 fputs("tig warning: ", stderr);
5119 vfprintf(stderr, msg, args);
5120 fputs("\n", stderr);
5121 va_end(args);
5122 }
5124 int
5125 main(int argc, char *argv[])
5126 {
5127 struct view *view;
5128 enum request request;
5129 size_t i;
5131 signal(SIGINT, quit);
5133 if (setlocale(LC_ALL, "")) {
5134 char *codeset = nl_langinfo(CODESET);
5136 string_ncopy(opt_codeset, codeset, strlen(codeset));
5137 }
5139 if (load_repo_info() == ERR)
5140 die("Failed to load repo info.");
5142 if (load_options() == ERR)
5143 die("Failed to load user config.");
5145 /* Load the repo config file so options can be overwritten from
5146 * the command line. */
5147 if (load_repo_config() == ERR)
5148 die("Failed to load repo config.");
5150 if (!parse_options(argc, argv))
5151 return 0;
5153 /* Require a git repository unless when running in pager mode. */
5154 if (!opt_git_dir[0])
5155 die("Not a git repository");
5157 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
5158 opt_utf8 = FALSE;
5160 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
5161 opt_iconv = iconv_open(opt_codeset, opt_encoding);
5162 if (opt_iconv == ICONV_NONE)
5163 die("Failed to initialize character set conversion");
5164 }
5166 if (load_refs() == ERR)
5167 die("Failed to load refs.");
5169 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
5170 view->cmd_env = getenv(view->cmd_env);
5172 request = opt_request;
5174 init_display();
5176 while (view_driver(display[current_view], request)) {
5177 int key;
5178 int i;
5180 foreach_view (view, i)
5181 update_view(view);
5183 /* Refresh, accept single keystroke of input */
5184 key = wgetch(status_win);
5186 /* wgetch() with nodelay() enabled returns ERR when there's no
5187 * input. */
5188 if (key == ERR) {
5189 request = REQ_NONE;
5190 continue;
5191 }
5193 request = get_keybinding(display[current_view]->keymap, key);
5195 /* Some low-level request handling. This keeps access to
5196 * status_win restricted. */
5197 switch (request) {
5198 case REQ_PROMPT:
5199 {
5200 char *cmd = read_prompt(":");
5202 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
5203 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
5204 opt_request = REQ_VIEW_DIFF;
5205 } else {
5206 opt_request = REQ_VIEW_PAGER;
5207 }
5208 break;
5209 }
5211 request = REQ_NONE;
5212 break;
5213 }
5214 case REQ_SEARCH:
5215 case REQ_SEARCH_BACK:
5216 {
5217 const char *prompt = request == REQ_SEARCH
5218 ? "/" : "?";
5219 char *search = read_prompt(prompt);
5221 if (search)
5222 string_ncopy(opt_search, search, strlen(search));
5223 else
5224 request = REQ_NONE;
5225 break;
5226 }
5227 case REQ_SCREEN_RESIZE:
5228 {
5229 int height, width;
5231 getmaxyx(stdscr, height, width);
5233 /* Resize the status view and let the view driver take
5234 * care of resizing the displayed views. */
5235 wresize(status_win, 1, width);
5236 mvwin(status_win, height - 1, 0);
5237 wrefresh(status_win);
5238 break;
5239 }
5240 default:
5241 break;
5242 }
5243 }
5245 quit(0);
5247 return 0;
5248 }