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1 /* Copyright (c) 2006 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 #ifndef TIG_VERSION
15 #define TIG_VERSION "unknown-version"
16 #endif
18 #ifndef DEBUG
19 #define NDEBUG
20 #endif
22 #include <assert.h>
23 #include <errno.h>
24 #include <ctype.h>
25 #include <signal.h>
26 #include <stdarg.h>
27 #include <stdio.h>
28 #include <stdlib.h>
29 #include <string.h>
30 #include <sys/types.h>
31 #include <sys/stat.h>
32 #include <unistd.h>
33 #include <time.h>
35 #include <regex.h>
37 #include <locale.h>
38 #include <langinfo.h>
39 #include <iconv.h>
41 #include <curses.h>
43 #include "config.h"
45 #if __GNUC__ >= 3
46 #define __NORETURN __attribute__((__noreturn__))
47 #else
48 #define __NORETURN
49 #endif
51 static void __NORETURN die(const char *err, ...);
52 static void report(const char *msg, ...);
53 static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, size_t, char *, size_t));
54 static void set_nonblocking_input(bool loading);
55 static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
57 #define ABS(x) ((x) >= 0 ? (x) : -(x))
58 #define MIN(x, y) ((x) < (y) ? (x) : (y))
60 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
61 #define STRING_SIZE(x) (sizeof(x) - 1)
63 #define SIZEOF_STR 1024 /* Default string size. */
64 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
65 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
67 /* Revision graph */
69 #define REVGRAPH_INIT 'I'
70 #define REVGRAPH_MERGE 'M'
71 #define REVGRAPH_BRANCH '+'
72 #define REVGRAPH_COMMIT '*'
73 #define REVGRAPH_LINE '|'
75 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
77 /* This color name can be used to refer to the default term colors. */
78 #define COLOR_DEFAULT (-1)
80 #define ICONV_NONE ((iconv_t) -1)
82 /* The format and size of the date column in the main view. */
83 #define DATE_FORMAT "%Y-%m-%d %H:%M"
84 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
86 #define AUTHOR_COLS 20
88 /* The default interval between line numbers. */
89 #define NUMBER_INTERVAL 1
91 #define TABSIZE 8
93 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
95 #ifndef GIT_CONFIG
96 #define "git config"
97 #endif
99 #define TIG_LS_REMOTE \
100 "git ls-remote $(git rev-parse --git-dir) 2>/dev/null"
102 #define TIG_DIFF_CMD \
103 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
105 #define TIG_LOG_CMD \
106 "git log --cc --stat -n100 %s 2>/dev/null"
108 #define TIG_MAIN_CMD \
109 "git log --topo-order --pretty=raw %s 2>/dev/null"
111 #define TIG_TREE_CMD \
112 "git ls-tree %s %s"
114 #define TIG_BLOB_CMD \
115 "git cat-file blob %s"
117 /* XXX: Needs to be defined to the empty string. */
118 #define TIG_HELP_CMD ""
119 #define TIG_PAGER_CMD ""
120 #define TIG_STATUS_CMD ""
122 /* Some ascii-shorthands fitted into the ncurses namespace. */
123 #define KEY_TAB '\t'
124 #define KEY_RETURN '\r'
125 #define KEY_ESC 27
128 struct ref {
129 char *name; /* Ref name; tag or head names are shortened. */
130 char id[SIZEOF_REV]; /* Commit SHA1 ID */
131 unsigned int tag:1; /* Is it a tag? */
132 unsigned int remote:1; /* Is it a remote ref? */
133 unsigned int next:1; /* For ref lists: are there more refs? */
134 };
136 static struct ref **get_refs(char *id);
138 struct int_map {
139 const char *name;
140 int namelen;
141 int value;
142 };
144 static int
145 set_from_int_map(struct int_map *map, size_t map_size,
146 int *value, const char *name, int namelen)
147 {
149 int i;
151 for (i = 0; i < map_size; i++)
152 if (namelen == map[i].namelen &&
153 !strncasecmp(name, map[i].name, namelen)) {
154 *value = map[i].value;
155 return OK;
156 }
158 return ERR;
159 }
162 /*
163 * String helpers
164 */
166 static inline void
167 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
168 {
169 if (srclen > dstlen - 1)
170 srclen = dstlen - 1;
172 strncpy(dst, src, srclen);
173 dst[srclen] = 0;
174 }
176 /* Shorthands for safely copying into a fixed buffer. */
178 #define string_copy(dst, src) \
179 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
181 #define string_ncopy(dst, src, srclen) \
182 string_ncopy_do(dst, sizeof(dst), src, srclen)
184 #define string_copy_rev(dst, src) \
185 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
187 #define string_add(dst, from, src) \
188 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
190 static char *
191 chomp_string(char *name)
192 {
193 int namelen;
195 while (isspace(*name))
196 name++;
198 namelen = strlen(name) - 1;
199 while (namelen > 0 && isspace(name[namelen]))
200 name[namelen--] = 0;
202 return name;
203 }
205 static bool
206 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
207 {
208 va_list args;
209 size_t pos = bufpos ? *bufpos : 0;
211 va_start(args, fmt);
212 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
213 va_end(args);
215 if (bufpos)
216 *bufpos = pos;
218 return pos >= bufsize ? FALSE : TRUE;
219 }
221 #define string_format(buf, fmt, args...) \
222 string_nformat(buf, sizeof(buf), NULL, fmt, args)
224 #define string_format_from(buf, from, fmt, args...) \
225 string_nformat(buf, sizeof(buf), from, fmt, args)
227 static int
228 string_enum_compare(const char *str1, const char *str2, int len)
229 {
230 size_t i;
232 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
234 /* Diff-Header == DIFF_HEADER */
235 for (i = 0; i < len; i++) {
236 if (toupper(str1[i]) == toupper(str2[i]))
237 continue;
239 if (string_enum_sep(str1[i]) &&
240 string_enum_sep(str2[i]))
241 continue;
243 return str1[i] - str2[i];
244 }
246 return 0;
247 }
249 /* Shell quoting
250 *
251 * NOTE: The following is a slightly modified copy of the git project's shell
252 * quoting routines found in the quote.c file.
253 *
254 * Help to copy the thing properly quoted for the shell safety. any single
255 * quote is replaced with '\'', any exclamation point is replaced with '\!',
256 * and the whole thing is enclosed in a
257 *
258 * E.g.
259 * original sq_quote result
260 * name ==> name ==> 'name'
261 * a b ==> a b ==> 'a b'
262 * a'b ==> a'\''b ==> 'a'\''b'
263 * a!b ==> a'\!'b ==> 'a'\!'b'
264 */
266 static size_t
267 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
268 {
269 char c;
271 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
273 BUFPUT('\'');
274 while ((c = *src++)) {
275 if (c == '\'' || c == '!') {
276 BUFPUT('\'');
277 BUFPUT('\\');
278 BUFPUT(c);
279 BUFPUT('\'');
280 } else {
281 BUFPUT(c);
282 }
283 }
284 BUFPUT('\'');
286 if (bufsize < SIZEOF_STR)
287 buf[bufsize] = 0;
289 return bufsize;
290 }
293 /*
294 * User requests
295 */
297 #define REQ_INFO \
298 /* XXX: Keep the view request first and in sync with views[]. */ \
299 REQ_GROUP("View switching") \
300 REQ_(VIEW_MAIN, "Show main view"), \
301 REQ_(VIEW_DIFF, "Show diff view"), \
302 REQ_(VIEW_LOG, "Show log view"), \
303 REQ_(VIEW_TREE, "Show tree view"), \
304 REQ_(VIEW_BLOB, "Show blob view"), \
305 REQ_(VIEW_HELP, "Show help page"), \
306 REQ_(VIEW_PAGER, "Show pager view"), \
307 REQ_(VIEW_STATUS, "Show status view"), \
308 \
309 REQ_GROUP("View manipulation") \
310 REQ_(ENTER, "Enter current line and scroll"), \
311 REQ_(NEXT, "Move to next"), \
312 REQ_(PREVIOUS, "Move to previous"), \
313 REQ_(VIEW_NEXT, "Move focus to next view"), \
314 REQ_(VIEW_CLOSE, "Close the current view"), \
315 REQ_(QUIT, "Close all views and quit"), \
316 \
317 REQ_GROUP("Cursor navigation") \
318 REQ_(MOVE_UP, "Move cursor one line up"), \
319 REQ_(MOVE_DOWN, "Move cursor one line down"), \
320 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
321 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
322 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
323 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
324 \
325 REQ_GROUP("Scrolling") \
326 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
327 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
328 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
329 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
330 \
331 REQ_GROUP("Searching") \
332 REQ_(SEARCH, "Search the view"), \
333 REQ_(SEARCH_BACK, "Search backwards in the view"), \
334 REQ_(FIND_NEXT, "Find next search match"), \
335 REQ_(FIND_PREV, "Find previous search match"), \
336 \
337 REQ_GROUP("Misc") \
338 REQ_(NONE, "Do nothing"), \
339 REQ_(PROMPT, "Bring up the prompt"), \
340 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
341 REQ_(SCREEN_RESIZE, "Resize the screen"), \
342 REQ_(SHOW_VERSION, "Show version information"), \
343 REQ_(STOP_LOADING, "Stop all loading views"), \
344 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
345 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
346 REQ_(STATUS_UPDATE, "Update file status"), \
347 REQ_(EDIT, "Open in editor")
350 /* User action requests. */
351 enum request {
352 #define REQ_GROUP(help)
353 #define REQ_(req, help) REQ_##req
355 /* Offset all requests to avoid conflicts with ncurses getch values. */
356 REQ_OFFSET = KEY_MAX + 1,
357 REQ_INFO,
358 REQ_UNKNOWN,
360 #undef REQ_GROUP
361 #undef REQ_
362 };
364 struct request_info {
365 enum request request;
366 char *name;
367 int namelen;
368 char *help;
369 };
371 static struct request_info req_info[] = {
372 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
373 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
374 REQ_INFO
375 #undef REQ_GROUP
376 #undef REQ_
377 };
379 static enum request
380 get_request(const char *name)
381 {
382 int namelen = strlen(name);
383 int i;
385 for (i = 0; i < ARRAY_SIZE(req_info); i++)
386 if (req_info[i].namelen == namelen &&
387 !string_enum_compare(req_info[i].name, name, namelen))
388 return req_info[i].request;
390 return REQ_UNKNOWN;
391 }
394 /*
395 * Options
396 */
398 static const char usage[] =
399 "tig " TIG_VERSION " (" __DATE__ ")\n"
400 "\n"
401 "Usage: tig [options]\n"
402 " or: tig [options] [--] [git log options]\n"
403 " or: tig [options] log [git log options]\n"
404 " or: tig [options] diff [git diff options]\n"
405 " or: tig [options] show [git show options]\n"
406 " or: tig [options] < [git command output]\n"
407 "\n"
408 "Options:\n"
409 " -l Start up in log view\n"
410 " -d Start up in diff view\n"
411 " -S Start up in status view\n"
412 " -n[I], --line-number[=I] Show line numbers with given interval\n"
413 " -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
414 " -- Mark end of tig options\n"
415 " -v, --version Show version and exit\n"
416 " -h, --help Show help message and exit\n";
418 /* Option and state variables. */
419 static bool opt_line_number = FALSE;
420 static bool opt_rev_graph = FALSE;
421 static int opt_num_interval = NUMBER_INTERVAL;
422 static int opt_tab_size = TABSIZE;
423 static enum request opt_request = REQ_VIEW_MAIN;
424 static char opt_cmd[SIZEOF_STR] = "";
425 static char opt_path[SIZEOF_STR] = "";
426 static FILE *opt_pipe = NULL;
427 static char opt_encoding[20] = "UTF-8";
428 static bool opt_utf8 = TRUE;
429 static char opt_codeset[20] = "UTF-8";
430 static iconv_t opt_iconv = ICONV_NONE;
431 static char opt_search[SIZEOF_STR] = "";
432 static char opt_cdup[SIZEOF_STR] = "";
433 static char opt_git_dir[SIZEOF_STR] = "";
434 static char opt_editor[SIZEOF_STR] = "";
436 enum option_type {
437 OPT_NONE,
438 OPT_INT,
439 };
441 static bool
442 check_option(char *opt, char short_name, char *name, enum option_type type, ...)
443 {
444 va_list args;
445 char *value = "";
446 int *number;
448 if (opt[0] != '-')
449 return FALSE;
451 if (opt[1] == '-') {
452 int namelen = strlen(name);
454 opt += 2;
456 if (strncmp(opt, name, namelen))
457 return FALSE;
459 if (opt[namelen] == '=')
460 value = opt + namelen + 1;
462 } else {
463 if (!short_name || opt[1] != short_name)
464 return FALSE;
465 value = opt + 2;
466 }
468 va_start(args, type);
469 if (type == OPT_INT) {
470 number = va_arg(args, int *);
471 if (isdigit(*value))
472 *number = atoi(value);
473 }
474 va_end(args);
476 return TRUE;
477 }
479 /* Returns the index of log or diff command or -1 to exit. */
480 static bool
481 parse_options(int argc, char *argv[])
482 {
483 int i;
485 for (i = 1; i < argc; i++) {
486 char *opt = argv[i];
488 if (!strcmp(opt, "log") ||
489 !strcmp(opt, "diff") ||
490 !strcmp(opt, "show")) {
491 opt_request = opt[0] == 'l'
492 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
493 break;
494 }
496 if (opt[0] && opt[0] != '-')
497 break;
499 if (!strcmp(opt, "-l")) {
500 opt_request = REQ_VIEW_LOG;
501 continue;
502 }
504 if (!strcmp(opt, "-d")) {
505 opt_request = REQ_VIEW_DIFF;
506 continue;
507 }
509 if (!strcmp(opt, "-S")) {
510 opt_request = REQ_VIEW_STATUS;
511 continue;
512 }
514 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
515 opt_line_number = TRUE;
516 continue;
517 }
519 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
520 opt_tab_size = MIN(opt_tab_size, TABSIZE);
521 continue;
522 }
524 if (check_option(opt, 'v', "version", OPT_NONE)) {
525 printf("tig version %s\n", TIG_VERSION);
526 return FALSE;
527 }
529 if (check_option(opt, 'h', "help", OPT_NONE)) {
530 printf(usage);
531 return FALSE;
532 }
534 if (!strcmp(opt, "--")) {
535 i++;
536 break;
537 }
539 die("unknown option '%s'\n\n%s", opt, usage);
540 }
542 if (!isatty(STDIN_FILENO)) {
543 opt_request = REQ_VIEW_PAGER;
544 opt_pipe = stdin;
546 } else if (i < argc) {
547 size_t buf_size;
549 if (opt_request == REQ_VIEW_MAIN)
550 /* XXX: This is vulnerable to the user overriding
551 * options required for the main view parser. */
552 string_copy(opt_cmd, "git log --pretty=raw");
553 else
554 string_copy(opt_cmd, "git");
555 buf_size = strlen(opt_cmd);
557 while (buf_size < sizeof(opt_cmd) && i < argc) {
558 opt_cmd[buf_size++] = ' ';
559 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
560 }
562 if (buf_size >= sizeof(opt_cmd))
563 die("command too long");
565 opt_cmd[buf_size] = 0;
566 }
568 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
569 opt_utf8 = FALSE;
571 return TRUE;
572 }
575 /*
576 * Line-oriented content detection.
577 */
579 #define LINE_INFO \
580 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
581 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
582 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
583 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
584 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
585 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
586 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
587 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
588 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
589 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
590 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
591 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
592 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
593 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
594 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
595 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
596 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
597 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
598 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
599 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
600 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
601 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
602 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
603 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
604 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
605 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
606 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
607 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
608 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
609 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
610 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
611 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
612 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
613 LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
614 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
615 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
616 LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
617 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
618 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
619 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
620 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
621 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
622 LINE(STAT_SECTION, "", COLOR_DEFAULT, COLOR_BLUE, A_BOLD), \
623 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
624 LINE(STAT_STAGED, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
625 LINE(STAT_UNSTAGED,"", COLOR_YELLOW, COLOR_DEFAULT, 0), \
626 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0)
628 enum line_type {
629 #define LINE(type, line, fg, bg, attr) \
630 LINE_##type
631 LINE_INFO
632 #undef LINE
633 };
635 struct line_info {
636 const char *name; /* Option name. */
637 int namelen; /* Size of option name. */
638 const char *line; /* The start of line to match. */
639 int linelen; /* Size of string to match. */
640 int fg, bg, attr; /* Color and text attributes for the lines. */
641 };
643 static struct line_info line_info[] = {
644 #define LINE(type, line, fg, bg, attr) \
645 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
646 LINE_INFO
647 #undef LINE
648 };
650 static enum line_type
651 get_line_type(char *line)
652 {
653 int linelen = strlen(line);
654 enum line_type type;
656 for (type = 0; type < ARRAY_SIZE(line_info); type++)
657 /* Case insensitive search matches Signed-off-by lines better. */
658 if (linelen >= line_info[type].linelen &&
659 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
660 return type;
662 return LINE_DEFAULT;
663 }
665 static inline int
666 get_line_attr(enum line_type type)
667 {
668 assert(type < ARRAY_SIZE(line_info));
669 return COLOR_PAIR(type) | line_info[type].attr;
670 }
672 static struct line_info *
673 get_line_info(char *name, int namelen)
674 {
675 enum line_type type;
677 for (type = 0; type < ARRAY_SIZE(line_info); type++)
678 if (namelen == line_info[type].namelen &&
679 !string_enum_compare(line_info[type].name, name, namelen))
680 return &line_info[type];
682 return NULL;
683 }
685 static void
686 init_colors(void)
687 {
688 int default_bg = COLOR_BLACK;
689 int default_fg = COLOR_WHITE;
690 enum line_type type;
692 start_color();
694 if (use_default_colors() != ERR) {
695 default_bg = -1;
696 default_fg = -1;
697 }
699 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
700 struct line_info *info = &line_info[type];
701 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
702 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
704 init_pair(type, fg, bg);
705 }
706 }
708 struct line {
709 enum line_type type;
711 /* State flags */
712 unsigned int selected:1;
714 void *data; /* User data */
715 };
718 /*
719 * Keys
720 */
722 struct keybinding {
723 int alias;
724 enum request request;
725 struct keybinding *next;
726 };
728 static struct keybinding default_keybindings[] = {
729 /* View switching */
730 { 'm', REQ_VIEW_MAIN },
731 { 'd', REQ_VIEW_DIFF },
732 { 'l', REQ_VIEW_LOG },
733 { 't', REQ_VIEW_TREE },
734 { 'f', REQ_VIEW_BLOB },
735 { 'p', REQ_VIEW_PAGER },
736 { 'h', REQ_VIEW_HELP },
737 { 'S', REQ_VIEW_STATUS },
739 /* View manipulation */
740 { 'q', REQ_VIEW_CLOSE },
741 { KEY_TAB, REQ_VIEW_NEXT },
742 { KEY_RETURN, REQ_ENTER },
743 { KEY_UP, REQ_PREVIOUS },
744 { KEY_DOWN, REQ_NEXT },
746 /* Cursor navigation */
747 { 'k', REQ_MOVE_UP },
748 { 'j', REQ_MOVE_DOWN },
749 { KEY_HOME, REQ_MOVE_FIRST_LINE },
750 { KEY_END, REQ_MOVE_LAST_LINE },
751 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
752 { ' ', REQ_MOVE_PAGE_DOWN },
753 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
754 { 'b', REQ_MOVE_PAGE_UP },
755 { '-', REQ_MOVE_PAGE_UP },
757 /* Scrolling */
758 { KEY_IC, REQ_SCROLL_LINE_UP },
759 { KEY_DC, REQ_SCROLL_LINE_DOWN },
760 { 'w', REQ_SCROLL_PAGE_UP },
761 { 's', REQ_SCROLL_PAGE_DOWN },
763 /* Searching */
764 { '/', REQ_SEARCH },
765 { '?', REQ_SEARCH_BACK },
766 { 'n', REQ_FIND_NEXT },
767 { 'N', REQ_FIND_PREV },
769 /* Misc */
770 { 'Q', REQ_QUIT },
771 { 'z', REQ_STOP_LOADING },
772 { 'v', REQ_SHOW_VERSION },
773 { 'r', REQ_SCREEN_REDRAW },
774 { '.', REQ_TOGGLE_LINENO },
775 { 'g', REQ_TOGGLE_REV_GRAPH },
776 { ':', REQ_PROMPT },
777 { 'u', REQ_STATUS_UPDATE },
778 { 'e', REQ_EDIT },
780 /* Using the ncurses SIGWINCH handler. */
781 { KEY_RESIZE, REQ_SCREEN_RESIZE },
782 };
784 #define KEYMAP_INFO \
785 KEYMAP_(GENERIC), \
786 KEYMAP_(MAIN), \
787 KEYMAP_(DIFF), \
788 KEYMAP_(LOG), \
789 KEYMAP_(TREE), \
790 KEYMAP_(BLOB), \
791 KEYMAP_(PAGER), \
792 KEYMAP_(HELP), \
793 KEYMAP_(STATUS)
795 enum keymap {
796 #define KEYMAP_(name) KEYMAP_##name
797 KEYMAP_INFO
798 #undef KEYMAP_
799 };
801 static struct int_map keymap_table[] = {
802 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
803 KEYMAP_INFO
804 #undef KEYMAP_
805 };
807 #define set_keymap(map, name) \
808 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
810 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
812 static void
813 add_keybinding(enum keymap keymap, enum request request, int key)
814 {
815 struct keybinding *keybinding;
817 keybinding = calloc(1, sizeof(*keybinding));
818 if (!keybinding)
819 die("Failed to allocate keybinding");
821 keybinding->alias = key;
822 keybinding->request = request;
823 keybinding->next = keybindings[keymap];
824 keybindings[keymap] = keybinding;
825 }
827 /* Looks for a key binding first in the given map, then in the generic map, and
828 * lastly in the default keybindings. */
829 static enum request
830 get_keybinding(enum keymap keymap, int key)
831 {
832 struct keybinding *kbd;
833 int i;
835 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
836 if (kbd->alias == key)
837 return kbd->request;
839 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
840 if (kbd->alias == key)
841 return kbd->request;
843 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
844 if (default_keybindings[i].alias == key)
845 return default_keybindings[i].request;
847 return (enum request) key;
848 }
851 struct key {
852 char *name;
853 int value;
854 };
856 static struct key key_table[] = {
857 { "Enter", KEY_RETURN },
858 { "Space", ' ' },
859 { "Backspace", KEY_BACKSPACE },
860 { "Tab", KEY_TAB },
861 { "Escape", KEY_ESC },
862 { "Left", KEY_LEFT },
863 { "Right", KEY_RIGHT },
864 { "Up", KEY_UP },
865 { "Down", KEY_DOWN },
866 { "Insert", KEY_IC },
867 { "Delete", KEY_DC },
868 { "Hash", '#' },
869 { "Home", KEY_HOME },
870 { "End", KEY_END },
871 { "PageUp", KEY_PPAGE },
872 { "PageDown", KEY_NPAGE },
873 { "F1", KEY_F(1) },
874 { "F2", KEY_F(2) },
875 { "F3", KEY_F(3) },
876 { "F4", KEY_F(4) },
877 { "F5", KEY_F(5) },
878 { "F6", KEY_F(6) },
879 { "F7", KEY_F(7) },
880 { "F8", KEY_F(8) },
881 { "F9", KEY_F(9) },
882 { "F10", KEY_F(10) },
883 { "F11", KEY_F(11) },
884 { "F12", KEY_F(12) },
885 };
887 static int
888 get_key_value(const char *name)
889 {
890 int i;
892 for (i = 0; i < ARRAY_SIZE(key_table); i++)
893 if (!strcasecmp(key_table[i].name, name))
894 return key_table[i].value;
896 if (strlen(name) == 1 && isprint(*name))
897 return (int) *name;
899 return ERR;
900 }
902 static char *
903 get_key(enum request request)
904 {
905 static char buf[BUFSIZ];
906 static char key_char[] = "'X'";
907 size_t pos = 0;
908 char *sep = "";
909 int i;
911 buf[pos] = 0;
913 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
914 struct keybinding *keybinding = &default_keybindings[i];
915 char *seq = NULL;
916 int key;
918 if (keybinding->request != request)
919 continue;
921 for (key = 0; key < ARRAY_SIZE(key_table); key++)
922 if (key_table[key].value == keybinding->alias)
923 seq = key_table[key].name;
925 if (seq == NULL &&
926 keybinding->alias < 127 &&
927 isprint(keybinding->alias)) {
928 key_char[1] = (char) keybinding->alias;
929 seq = key_char;
930 }
932 if (!seq)
933 seq = "'?'";
935 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
936 return "Too many keybindings!";
937 sep = ", ";
938 }
940 return buf;
941 }
944 /*
945 * User config file handling.
946 */
948 static struct int_map color_map[] = {
949 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
950 COLOR_MAP(DEFAULT),
951 COLOR_MAP(BLACK),
952 COLOR_MAP(BLUE),
953 COLOR_MAP(CYAN),
954 COLOR_MAP(GREEN),
955 COLOR_MAP(MAGENTA),
956 COLOR_MAP(RED),
957 COLOR_MAP(WHITE),
958 COLOR_MAP(YELLOW),
959 };
961 #define set_color(color, name) \
962 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
964 static struct int_map attr_map[] = {
965 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
966 ATTR_MAP(NORMAL),
967 ATTR_MAP(BLINK),
968 ATTR_MAP(BOLD),
969 ATTR_MAP(DIM),
970 ATTR_MAP(REVERSE),
971 ATTR_MAP(STANDOUT),
972 ATTR_MAP(UNDERLINE),
973 };
975 #define set_attribute(attr, name) \
976 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
978 static int config_lineno;
979 static bool config_errors;
980 static char *config_msg;
982 /* Wants: object fgcolor bgcolor [attr] */
983 static int
984 option_color_command(int argc, char *argv[])
985 {
986 struct line_info *info;
988 if (argc != 3 && argc != 4) {
989 config_msg = "Wrong number of arguments given to color command";
990 return ERR;
991 }
993 info = get_line_info(argv[0], strlen(argv[0]));
994 if (!info) {
995 config_msg = "Unknown color name";
996 return ERR;
997 }
999 if (set_color(&info->fg, argv[1]) == ERR ||
1000 set_color(&info->bg, argv[2]) == ERR) {
1001 config_msg = "Unknown color";
1002 return ERR;
1003 }
1005 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1006 config_msg = "Unknown attribute";
1007 return ERR;
1008 }
1010 return OK;
1011 }
1013 /* Wants: name = value */
1014 static int
1015 option_set_command(int argc, char *argv[])
1016 {
1017 if (argc != 3) {
1018 config_msg = "Wrong number of arguments given to set command";
1019 return ERR;
1020 }
1022 if (strcmp(argv[1], "=")) {
1023 config_msg = "No value assigned";
1024 return ERR;
1025 }
1027 if (!strcmp(argv[0], "show-rev-graph")) {
1028 opt_rev_graph = (!strcmp(argv[2], "1") ||
1029 !strcmp(argv[2], "true") ||
1030 !strcmp(argv[2], "yes"));
1031 return OK;
1032 }
1034 if (!strcmp(argv[0], "line-number-interval")) {
1035 opt_num_interval = atoi(argv[2]);
1036 return OK;
1037 }
1039 if (!strcmp(argv[0], "tab-size")) {
1040 opt_tab_size = atoi(argv[2]);
1041 return OK;
1042 }
1044 if (!strcmp(argv[0], "commit-encoding")) {
1045 char *arg = argv[2];
1046 int delimiter = *arg;
1047 int i;
1049 switch (delimiter) {
1050 case '"':
1051 case '\'':
1052 for (arg++, i = 0; arg[i]; i++)
1053 if (arg[i] == delimiter) {
1054 arg[i] = 0;
1055 break;
1056 }
1057 default:
1058 string_ncopy(opt_encoding, arg, strlen(arg));
1059 return OK;
1060 }
1061 }
1063 config_msg = "Unknown variable name";
1064 return ERR;
1065 }
1067 /* Wants: mode request key */
1068 static int
1069 option_bind_command(int argc, char *argv[])
1070 {
1071 enum request request;
1072 int keymap;
1073 int key;
1075 if (argc != 3) {
1076 config_msg = "Wrong number of arguments given to bind command";
1077 return ERR;
1078 }
1080 if (set_keymap(&keymap, argv[0]) == ERR) {
1081 config_msg = "Unknown key map";
1082 return ERR;
1083 }
1085 key = get_key_value(argv[1]);
1086 if (key == ERR) {
1087 config_msg = "Unknown key";
1088 return ERR;
1089 }
1091 request = get_request(argv[2]);
1092 if (request == REQ_UNKNOWN) {
1093 config_msg = "Unknown request name";
1094 return ERR;
1095 }
1097 add_keybinding(keymap, request, key);
1099 return OK;
1100 }
1102 static int
1103 set_option(char *opt, char *value)
1104 {
1105 char *argv[16];
1106 int valuelen;
1107 int argc = 0;
1109 /* Tokenize */
1110 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1111 argv[argc++] = value;
1113 value += valuelen;
1114 if (!*value)
1115 break;
1117 *value++ = 0;
1118 while (isspace(*value))
1119 value++;
1120 }
1122 if (!strcmp(opt, "color"))
1123 return option_color_command(argc, argv);
1125 if (!strcmp(opt, "set"))
1126 return option_set_command(argc, argv);
1128 if (!strcmp(opt, "bind"))
1129 return option_bind_command(argc, argv);
1131 config_msg = "Unknown option command";
1132 return ERR;
1133 }
1135 static int
1136 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1137 {
1138 int status = OK;
1140 config_lineno++;
1141 config_msg = "Internal error";
1143 /* Check for comment markers, since read_properties() will
1144 * only ensure opt and value are split at first " \t". */
1145 optlen = strcspn(opt, "#");
1146 if (optlen == 0)
1147 return OK;
1149 if (opt[optlen] != 0) {
1150 config_msg = "No option value";
1151 status = ERR;
1153 } else {
1154 /* Look for comment endings in the value. */
1155 size_t len = strcspn(value, "#");
1157 if (len < valuelen) {
1158 valuelen = len;
1159 value[valuelen] = 0;
1160 }
1162 status = set_option(opt, value);
1163 }
1165 if (status == ERR) {
1166 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1167 config_lineno, (int) optlen, opt, config_msg);
1168 config_errors = TRUE;
1169 }
1171 /* Always keep going if errors are encountered. */
1172 return OK;
1173 }
1175 static int
1176 load_options(void)
1177 {
1178 char *home = getenv("HOME");
1179 char buf[SIZEOF_STR];
1180 FILE *file;
1182 config_lineno = 0;
1183 config_errors = FALSE;
1185 if (!home || !string_format(buf, "%s/.tigrc", home))
1186 return ERR;
1188 /* It's ok that the file doesn't exist. */
1189 file = fopen(buf, "r");
1190 if (!file)
1191 return OK;
1193 if (read_properties(file, " \t", read_option) == ERR ||
1194 config_errors == TRUE)
1195 fprintf(stderr, "Errors while loading %s.\n", buf);
1197 return OK;
1198 }
1201 /*
1202 * The viewer
1203 */
1205 struct view;
1206 struct view_ops;
1208 /* The display array of active views and the index of the current view. */
1209 static struct view *display[2];
1210 static unsigned int current_view;
1212 /* Reading from the prompt? */
1213 static bool input_mode = FALSE;
1215 #define foreach_displayed_view(view, i) \
1216 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1218 #define displayed_views() (display[1] != NULL ? 2 : 1)
1220 /* Current head and commit ID */
1221 static char ref_blob[SIZEOF_REF] = "";
1222 static char ref_commit[SIZEOF_REF] = "HEAD";
1223 static char ref_head[SIZEOF_REF] = "HEAD";
1225 struct view {
1226 const char *name; /* View name */
1227 const char *cmd_fmt; /* Default command line format */
1228 const char *cmd_env; /* Command line set via environment */
1229 const char *id; /* Points to either of ref_{head,commit,blob} */
1231 struct view_ops *ops; /* View operations */
1233 enum keymap keymap; /* What keymap does this view have */
1235 char cmd[SIZEOF_STR]; /* Command buffer */
1236 char ref[SIZEOF_REF]; /* Hovered commit reference */
1237 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1239 int height, width; /* The width and height of the main window */
1240 WINDOW *win; /* The main window */
1241 WINDOW *title; /* The title window living below the main window */
1243 /* Navigation */
1244 unsigned long offset; /* Offset of the window top */
1245 unsigned long lineno; /* Current line number */
1247 /* Searching */
1248 char grep[SIZEOF_STR]; /* Search string */
1249 regex_t *regex; /* Pre-compiled regex */
1251 /* If non-NULL, points to the view that opened this view. If this view
1252 * is closed tig will switch back to the parent view. */
1253 struct view *parent;
1255 /* Buffering */
1256 unsigned long lines; /* Total number of lines */
1257 struct line *line; /* Line index */
1258 unsigned long line_size;/* Total number of allocated lines */
1259 unsigned int digits; /* Number of digits in the lines member. */
1261 /* Loading */
1262 FILE *pipe;
1263 time_t start_time;
1264 };
1266 struct view_ops {
1267 /* What type of content being displayed. Used in the title bar. */
1268 const char *type;
1269 /* Open and reads in all view content. */
1270 bool (*open)(struct view *view);
1271 /* Read one line; updates view->line. */
1272 bool (*read)(struct view *view, char *data);
1273 /* Draw one line; @lineno must be < view->height. */
1274 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
1275 /* Depending on view handle a special requests. */
1276 enum request (*request)(struct view *view, enum request request, struct line *line);
1277 /* Search for regex in a line. */
1278 bool (*grep)(struct view *view, struct line *line);
1279 /* Select line */
1280 void (*select)(struct view *view, struct line *line);
1281 };
1283 static struct view_ops pager_ops;
1284 static struct view_ops main_ops;
1285 static struct view_ops tree_ops;
1286 static struct view_ops blob_ops;
1287 static struct view_ops help_ops;
1288 static struct view_ops status_ops;
1290 #define VIEW_STR(name, cmd, env, ref, ops, map) \
1291 { name, cmd, #env, ref, ops, map}
1293 #define VIEW_(id, name, ops, ref) \
1294 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1297 static struct view views[] = {
1298 VIEW_(MAIN, "main", &main_ops, ref_head),
1299 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1300 VIEW_(LOG, "log", &pager_ops, ref_head),
1301 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1302 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
1303 VIEW_(HELP, "help", &help_ops, ""),
1304 VIEW_(PAGER, "pager", &pager_ops, "stdin"),
1305 VIEW_(STATUS, "status", &status_ops, ""),
1306 };
1308 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1310 #define foreach_view(view, i) \
1311 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1313 #define view_is_displayed(view) \
1314 (view == display[0] || view == display[1])
1316 static bool
1317 draw_view_line(struct view *view, unsigned int lineno)
1318 {
1319 struct line *line;
1320 bool selected = (view->offset + lineno == view->lineno);
1321 bool draw_ok;
1323 assert(view_is_displayed(view));
1325 if (view->offset + lineno >= view->lines)
1326 return FALSE;
1328 line = &view->line[view->offset + lineno];
1330 if (selected) {
1331 line->selected = TRUE;
1332 view->ops->select(view, line);
1333 } else if (line->selected) {
1334 line->selected = FALSE;
1335 wmove(view->win, lineno, 0);
1336 wclrtoeol(view->win);
1337 }
1339 scrollok(view->win, FALSE);
1340 draw_ok = view->ops->draw(view, line, lineno, selected);
1341 scrollok(view->win, TRUE);
1343 return draw_ok;
1344 }
1346 static void
1347 redraw_view_from(struct view *view, int lineno)
1348 {
1349 assert(0 <= lineno && lineno < view->height);
1351 for (; lineno < view->height; lineno++) {
1352 if (!draw_view_line(view, lineno))
1353 break;
1354 }
1356 redrawwin(view->win);
1357 if (input_mode)
1358 wnoutrefresh(view->win);
1359 else
1360 wrefresh(view->win);
1361 }
1363 static void
1364 redraw_view(struct view *view)
1365 {
1366 wclear(view->win);
1367 redraw_view_from(view, 0);
1368 }
1371 static void
1372 update_view_title(struct view *view)
1373 {
1374 char buf[SIZEOF_STR];
1375 char state[SIZEOF_STR];
1376 size_t bufpos = 0, statelen = 0;
1378 assert(view_is_displayed(view));
1380 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1381 unsigned int view_lines = view->offset + view->height;
1382 unsigned int lines = view->lines
1383 ? MIN(view_lines, view->lines) * 100 / view->lines
1384 : 0;
1386 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1387 view->ops->type,
1388 view->lineno + 1,
1389 view->lines,
1390 lines);
1392 if (view->pipe) {
1393 time_t secs = time(NULL) - view->start_time;
1395 /* Three git seconds are a long time ... */
1396 if (secs > 2)
1397 string_format_from(state, &statelen, " %lds", secs);
1398 }
1399 }
1401 string_format_from(buf, &bufpos, "[%s]", view->name);
1402 if (*view->ref && bufpos < view->width) {
1403 size_t refsize = strlen(view->ref);
1404 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1406 if (minsize < view->width)
1407 refsize = view->width - minsize + 7;
1408 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1409 }
1411 if (statelen && bufpos < view->width) {
1412 string_format_from(buf, &bufpos, " %s", state);
1413 }
1415 if (view == display[current_view])
1416 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1417 else
1418 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1420 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1421 wclrtoeol(view->title);
1422 wmove(view->title, 0, view->width - 1);
1424 if (input_mode)
1425 wnoutrefresh(view->title);
1426 else
1427 wrefresh(view->title);
1428 }
1430 static void
1431 resize_display(void)
1432 {
1433 int offset, i;
1434 struct view *base = display[0];
1435 struct view *view = display[1] ? display[1] : display[0];
1437 /* Setup window dimensions */
1439 getmaxyx(stdscr, base->height, base->width);
1441 /* Make room for the status window. */
1442 base->height -= 1;
1444 if (view != base) {
1445 /* Horizontal split. */
1446 view->width = base->width;
1447 view->height = SCALE_SPLIT_VIEW(base->height);
1448 base->height -= view->height;
1450 /* Make room for the title bar. */
1451 view->height -= 1;
1452 }
1454 /* Make room for the title bar. */
1455 base->height -= 1;
1457 offset = 0;
1459 foreach_displayed_view (view, i) {
1460 if (!view->win) {
1461 view->win = newwin(view->height, 0, offset, 0);
1462 if (!view->win)
1463 die("Failed to create %s view", view->name);
1465 scrollok(view->win, TRUE);
1467 view->title = newwin(1, 0, offset + view->height, 0);
1468 if (!view->title)
1469 die("Failed to create title window");
1471 } else {
1472 wresize(view->win, view->height, view->width);
1473 mvwin(view->win, offset, 0);
1474 mvwin(view->title, offset + view->height, 0);
1475 }
1477 offset += view->height + 1;
1478 }
1479 }
1481 static void
1482 redraw_display(void)
1483 {
1484 struct view *view;
1485 int i;
1487 foreach_displayed_view (view, i) {
1488 redraw_view(view);
1489 update_view_title(view);
1490 }
1491 }
1493 static void
1494 update_display_cursor(struct view *view)
1495 {
1496 /* Move the cursor to the right-most column of the cursor line.
1497 *
1498 * XXX: This could turn out to be a bit expensive, but it ensures that
1499 * the cursor does not jump around. */
1500 if (view->lines) {
1501 wmove(view->win, view->lineno - view->offset, view->width - 1);
1502 wrefresh(view->win);
1503 }
1504 }
1506 /*
1507 * Navigation
1508 */
1510 /* Scrolling backend */
1511 static void
1512 do_scroll_view(struct view *view, int lines)
1513 {
1514 bool redraw_current_line = FALSE;
1516 /* The rendering expects the new offset. */
1517 view->offset += lines;
1519 assert(0 <= view->offset && view->offset < view->lines);
1520 assert(lines);
1522 /* Move current line into the view. */
1523 if (view->lineno < view->offset) {
1524 view->lineno = view->offset;
1525 redraw_current_line = TRUE;
1526 } else if (view->lineno >= view->offset + view->height) {
1527 view->lineno = view->offset + view->height - 1;
1528 redraw_current_line = TRUE;
1529 }
1531 assert(view->offset <= view->lineno && view->lineno < view->lines);
1533 /* Redraw the whole screen if scrolling is pointless. */
1534 if (view->height < ABS(lines)) {
1535 redraw_view(view);
1537 } else {
1538 int line = lines > 0 ? view->height - lines : 0;
1539 int end = line + ABS(lines);
1541 wscrl(view->win, lines);
1543 for (; line < end; line++) {
1544 if (!draw_view_line(view, line))
1545 break;
1546 }
1548 if (redraw_current_line)
1549 draw_view_line(view, view->lineno - view->offset);
1550 }
1552 redrawwin(view->win);
1553 wrefresh(view->win);
1554 report("");
1555 }
1557 /* Scroll frontend */
1558 static void
1559 scroll_view(struct view *view, enum request request)
1560 {
1561 int lines = 1;
1563 assert(view_is_displayed(view));
1565 switch (request) {
1566 case REQ_SCROLL_PAGE_DOWN:
1567 lines = view->height;
1568 case REQ_SCROLL_LINE_DOWN:
1569 if (view->offset + lines > view->lines)
1570 lines = view->lines - view->offset;
1572 if (lines == 0 || view->offset + view->height >= view->lines) {
1573 report("Cannot scroll beyond the last line");
1574 return;
1575 }
1576 break;
1578 case REQ_SCROLL_PAGE_UP:
1579 lines = view->height;
1580 case REQ_SCROLL_LINE_UP:
1581 if (lines > view->offset)
1582 lines = view->offset;
1584 if (lines == 0) {
1585 report("Cannot scroll beyond the first line");
1586 return;
1587 }
1589 lines = -lines;
1590 break;
1592 default:
1593 die("request %d not handled in switch", request);
1594 }
1596 do_scroll_view(view, lines);
1597 }
1599 /* Cursor moving */
1600 static void
1601 move_view(struct view *view, enum request request)
1602 {
1603 int scroll_steps = 0;
1604 int steps;
1606 switch (request) {
1607 case REQ_MOVE_FIRST_LINE:
1608 steps = -view->lineno;
1609 break;
1611 case REQ_MOVE_LAST_LINE:
1612 steps = view->lines - view->lineno - 1;
1613 break;
1615 case REQ_MOVE_PAGE_UP:
1616 steps = view->height > view->lineno
1617 ? -view->lineno : -view->height;
1618 break;
1620 case REQ_MOVE_PAGE_DOWN:
1621 steps = view->lineno + view->height >= view->lines
1622 ? view->lines - view->lineno - 1 : view->height;
1623 break;
1625 case REQ_MOVE_UP:
1626 steps = -1;
1627 break;
1629 case REQ_MOVE_DOWN:
1630 steps = 1;
1631 break;
1633 default:
1634 die("request %d not handled in switch", request);
1635 }
1637 if (steps <= 0 && view->lineno == 0) {
1638 report("Cannot move beyond the first line");
1639 return;
1641 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
1642 report("Cannot move beyond the last line");
1643 return;
1644 }
1646 /* Move the current line */
1647 view->lineno += steps;
1648 assert(0 <= view->lineno && view->lineno < view->lines);
1650 /* Check whether the view needs to be scrolled */
1651 if (view->lineno < view->offset ||
1652 view->lineno >= view->offset + view->height) {
1653 scroll_steps = steps;
1654 if (steps < 0 && -steps > view->offset) {
1655 scroll_steps = -view->offset;
1657 } else if (steps > 0) {
1658 if (view->lineno == view->lines - 1 &&
1659 view->lines > view->height) {
1660 scroll_steps = view->lines - view->offset - 1;
1661 if (scroll_steps >= view->height)
1662 scroll_steps -= view->height - 1;
1663 }
1664 }
1665 }
1667 if (!view_is_displayed(view)) {
1668 view->offset += scroll_steps;
1669 assert(0 <= view->offset && view->offset < view->lines);
1670 view->ops->select(view, &view->line[view->lineno]);
1671 return;
1672 }
1674 /* Repaint the old "current" line if we be scrolling */
1675 if (ABS(steps) < view->height)
1676 draw_view_line(view, view->lineno - steps - view->offset);
1678 if (scroll_steps) {
1679 do_scroll_view(view, scroll_steps);
1680 return;
1681 }
1683 /* Draw the current line */
1684 draw_view_line(view, view->lineno - view->offset);
1686 redrawwin(view->win);
1687 wrefresh(view->win);
1688 report("");
1689 }
1692 /*
1693 * Searching
1694 */
1696 static void search_view(struct view *view, enum request request);
1698 static bool
1699 find_next_line(struct view *view, unsigned long lineno, struct line *line)
1700 {
1701 assert(view_is_displayed(view));
1703 if (!view->ops->grep(view, line))
1704 return FALSE;
1706 if (lineno - view->offset >= view->height) {
1707 view->offset = lineno;
1708 view->lineno = lineno;
1709 redraw_view(view);
1711 } else {
1712 unsigned long old_lineno = view->lineno - view->offset;
1714 view->lineno = lineno;
1715 draw_view_line(view, old_lineno);
1717 draw_view_line(view, view->lineno - view->offset);
1718 redrawwin(view->win);
1719 wrefresh(view->win);
1720 }
1722 report("Line %ld matches '%s'", lineno + 1, view->grep);
1723 return TRUE;
1724 }
1726 static void
1727 find_next(struct view *view, enum request request)
1728 {
1729 unsigned long lineno = view->lineno;
1730 int direction;
1732 if (!*view->grep) {
1733 if (!*opt_search)
1734 report("No previous search");
1735 else
1736 search_view(view, request);
1737 return;
1738 }
1740 switch (request) {
1741 case REQ_SEARCH:
1742 case REQ_FIND_NEXT:
1743 direction = 1;
1744 break;
1746 case REQ_SEARCH_BACK:
1747 case REQ_FIND_PREV:
1748 direction = -1;
1749 break;
1751 default:
1752 return;
1753 }
1755 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1756 lineno += direction;
1758 /* Note, lineno is unsigned long so will wrap around in which case it
1759 * will become bigger than view->lines. */
1760 for (; lineno < view->lines; lineno += direction) {
1761 struct line *line = &view->line[lineno];
1763 if (find_next_line(view, lineno, line))
1764 return;
1765 }
1767 report("No match found for '%s'", view->grep);
1768 }
1770 static void
1771 search_view(struct view *view, enum request request)
1772 {
1773 int regex_err;
1775 if (view->regex) {
1776 regfree(view->regex);
1777 *view->grep = 0;
1778 } else {
1779 view->regex = calloc(1, sizeof(*view->regex));
1780 if (!view->regex)
1781 return;
1782 }
1784 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
1785 if (regex_err != 0) {
1786 char buf[SIZEOF_STR] = "unknown error";
1788 regerror(regex_err, view->regex, buf, sizeof(buf));
1789 report("Search failed: %s", buf);
1790 return;
1791 }
1793 string_copy(view->grep, opt_search);
1795 find_next(view, request);
1796 }
1798 /*
1799 * Incremental updating
1800 */
1802 static void
1803 end_update(struct view *view)
1804 {
1805 if (!view->pipe)
1806 return;
1807 set_nonblocking_input(FALSE);
1808 if (view->pipe == stdin)
1809 fclose(view->pipe);
1810 else
1811 pclose(view->pipe);
1812 view->pipe = NULL;
1813 }
1815 static bool
1816 begin_update(struct view *view)
1817 {
1818 if (view->pipe)
1819 end_update(view);
1821 if (opt_cmd[0]) {
1822 string_copy(view->cmd, opt_cmd);
1823 opt_cmd[0] = 0;
1824 /* When running random commands, initially show the
1825 * command in the title. However, it maybe later be
1826 * overwritten if a commit line is selected. */
1827 if (view == VIEW(REQ_VIEW_PAGER))
1828 string_copy(view->ref, view->cmd);
1829 else
1830 view->ref[0] = 0;
1832 } else if (view == VIEW(REQ_VIEW_TREE)) {
1833 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1834 char path[SIZEOF_STR];
1836 if (strcmp(view->vid, view->id))
1837 opt_path[0] = path[0] = 0;
1838 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
1839 return FALSE;
1841 if (!string_format(view->cmd, format, view->id, path))
1842 return FALSE;
1844 } else {
1845 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1846 const char *id = view->id;
1848 if (!string_format(view->cmd, format, id, id, id, id, id))
1849 return FALSE;
1851 /* Put the current ref_* value to the view title ref
1852 * member. This is needed by the blob view. Most other
1853 * views sets it automatically after loading because the
1854 * first line is a commit line. */
1855 string_copy_rev(view->ref, view->id);
1856 }
1858 /* Special case for the pager view. */
1859 if (opt_pipe) {
1860 view->pipe = opt_pipe;
1861 opt_pipe = NULL;
1862 } else {
1863 view->pipe = popen(view->cmd, "r");
1864 }
1866 if (!view->pipe)
1867 return FALSE;
1869 set_nonblocking_input(TRUE);
1871 view->offset = 0;
1872 view->lines = 0;
1873 view->lineno = 0;
1874 string_copy_rev(view->vid, view->id);
1876 if (view->line) {
1877 int i;
1879 for (i = 0; i < view->lines; i++)
1880 if (view->line[i].data)
1881 free(view->line[i].data);
1883 free(view->line);
1884 view->line = NULL;
1885 }
1887 view->start_time = time(NULL);
1889 return TRUE;
1890 }
1892 static struct line *
1893 realloc_lines(struct view *view, size_t line_size)
1894 {
1895 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1897 if (!tmp)
1898 return NULL;
1900 view->line = tmp;
1901 view->line_size = line_size;
1902 return view->line;
1903 }
1905 static bool
1906 update_view(struct view *view)
1907 {
1908 char in_buffer[BUFSIZ];
1909 char out_buffer[BUFSIZ * 2];
1910 char *line;
1911 /* The number of lines to read. If too low it will cause too much
1912 * redrawing (and possible flickering), if too high responsiveness
1913 * will suffer. */
1914 unsigned long lines = view->height;
1915 int redraw_from = -1;
1917 if (!view->pipe)
1918 return TRUE;
1920 /* Only redraw if lines are visible. */
1921 if (view->offset + view->height >= view->lines)
1922 redraw_from = view->lines - view->offset;
1924 /* FIXME: This is probably not perfect for backgrounded views. */
1925 if (!realloc_lines(view, view->lines + lines))
1926 goto alloc_error;
1928 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1929 size_t linelen = strlen(line);
1931 if (linelen)
1932 line[linelen - 1] = 0;
1934 if (opt_iconv != ICONV_NONE) {
1935 ICONV_INBUF_TYPE inbuf = line;
1936 size_t inlen = linelen;
1938 char *outbuf = out_buffer;
1939 size_t outlen = sizeof(out_buffer);
1941 size_t ret;
1943 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1944 if (ret != (size_t) -1) {
1945 line = out_buffer;
1946 linelen = strlen(out_buffer);
1947 }
1948 }
1950 if (!view->ops->read(view, line))
1951 goto alloc_error;
1953 if (lines-- == 1)
1954 break;
1955 }
1957 {
1958 int digits;
1960 lines = view->lines;
1961 for (digits = 0; lines; digits++)
1962 lines /= 10;
1964 /* Keep the displayed view in sync with line number scaling. */
1965 if (digits != view->digits) {
1966 view->digits = digits;
1967 redraw_from = 0;
1968 }
1969 }
1971 if (!view_is_displayed(view))
1972 goto check_pipe;
1974 if (view == VIEW(REQ_VIEW_TREE)) {
1975 /* Clear the view and redraw everything since the tree sorting
1976 * might have rearranged things. */
1977 redraw_view(view);
1979 } else if (redraw_from >= 0) {
1980 /* If this is an incremental update, redraw the previous line
1981 * since for commits some members could have changed when
1982 * loading the main view. */
1983 if (redraw_from > 0)
1984 redraw_from--;
1986 /* Since revision graph visualization requires knowledge
1987 * about the parent commit, it causes a further one-off
1988 * needed to be redrawn for incremental updates. */
1989 if (redraw_from > 0 && opt_rev_graph)
1990 redraw_from--;
1992 /* Incrementally draw avoids flickering. */
1993 redraw_view_from(view, redraw_from);
1994 }
1996 /* Update the title _after_ the redraw so that if the redraw picks up a
1997 * commit reference in view->ref it'll be available here. */
1998 update_view_title(view);
2000 check_pipe:
2001 if (ferror(view->pipe)) {
2002 report("Failed to read: %s", strerror(errno));
2003 goto end;
2005 } else if (feof(view->pipe)) {
2006 report("");
2007 goto end;
2008 }
2010 return TRUE;
2012 alloc_error:
2013 report("Allocation failure");
2015 end:
2016 view->ops->read(view, NULL);
2017 end_update(view);
2018 return FALSE;
2019 }
2021 static struct line *
2022 add_line_data(struct view *view, void *data, enum line_type type)
2023 {
2024 struct line *line = &view->line[view->lines++];
2026 memset(line, 0, sizeof(*line));
2027 line->type = type;
2028 line->data = data;
2030 return line;
2031 }
2033 static struct line *
2034 add_line_text(struct view *view, char *data, enum line_type type)
2035 {
2036 if (data)
2037 data = strdup(data);
2039 return data ? add_line_data(view, data, type) : NULL;
2040 }
2043 /*
2044 * View opening
2045 */
2047 enum open_flags {
2048 OPEN_DEFAULT = 0, /* Use default view switching. */
2049 OPEN_SPLIT = 1, /* Split current view. */
2050 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2051 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2052 };
2054 static void
2055 open_view(struct view *prev, enum request request, enum open_flags flags)
2056 {
2057 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2058 bool split = !!(flags & OPEN_SPLIT);
2059 bool reload = !!(flags & OPEN_RELOAD);
2060 struct view *view = VIEW(request);
2061 int nviews = displayed_views();
2062 struct view *base_view = display[0];
2064 if (view == prev && nviews == 1 && !reload) {
2065 report("Already in %s view", view->name);
2066 return;
2067 }
2069 if (view->ops->open) {
2070 if (!view->ops->open(view)) {
2071 report("Failed to load %s view", view->name);
2072 return;
2073 }
2075 } else if ((reload || strcmp(view->vid, view->id)) &&
2076 !begin_update(view)) {
2077 report("Failed to load %s view", view->name);
2078 return;
2079 }
2081 if (split) {
2082 display[1] = view;
2083 if (!backgrounded)
2084 current_view = 1;
2085 } else {
2086 /* Maximize the current view. */
2087 memset(display, 0, sizeof(display));
2088 current_view = 0;
2089 display[current_view] = view;
2090 }
2092 /* Resize the view when switching between split- and full-screen,
2093 * or when switching between two different full-screen views. */
2094 if (nviews != displayed_views() ||
2095 (nviews == 1 && base_view != display[0]))
2096 resize_display();
2098 if (split && prev->lineno - prev->offset >= prev->height) {
2099 /* Take the title line into account. */
2100 int lines = prev->lineno - prev->offset - prev->height + 1;
2102 /* Scroll the view that was split if the current line is
2103 * outside the new limited view. */
2104 do_scroll_view(prev, lines);
2105 }
2107 if (prev && view != prev) {
2108 if (split && !backgrounded) {
2109 /* "Blur" the previous view. */
2110 update_view_title(prev);
2111 }
2113 view->parent = prev;
2114 }
2116 if (view->pipe && view->lines == 0) {
2117 /* Clear the old view and let the incremental updating refill
2118 * the screen. */
2119 wclear(view->win);
2120 report("");
2121 } else {
2122 redraw_view(view);
2123 report("");
2124 }
2126 /* If the view is backgrounded the above calls to report()
2127 * won't redraw the view title. */
2128 if (backgrounded)
2129 update_view_title(view);
2130 }
2132 static void
2133 open_editor(struct view *view, char *file)
2134 {
2135 char cmd[SIZEOF_STR];
2136 char file_sq[SIZEOF_STR];
2137 char *editor;
2139 editor = getenv("GIT_EDITOR");
2140 if (!editor && *opt_editor)
2141 editor = opt_editor;
2142 if (!editor)
2143 editor = getenv("VISUAL");
2144 if (!editor)
2145 editor = getenv("EDITOR");
2146 if (!editor)
2147 editor = "vi";
2149 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2150 string_format(cmd, "%s %s", editor, file_sq)) {
2151 def_prog_mode(); /* save current tty modes */
2152 endwin(); /* restore original tty modes */
2153 system(cmd);
2154 reset_prog_mode();
2155 redraw_display();
2156 }
2157 }
2159 /*
2160 * User request switch noodle
2161 */
2163 static int
2164 view_driver(struct view *view, enum request request)
2165 {
2166 int i;
2168 if (view && view->lines) {
2169 request = view->ops->request(view, request, &view->line[view->lineno]);
2170 if (request == REQ_NONE)
2171 return TRUE;
2172 }
2174 switch (request) {
2175 case REQ_MOVE_UP:
2176 case REQ_MOVE_DOWN:
2177 case REQ_MOVE_PAGE_UP:
2178 case REQ_MOVE_PAGE_DOWN:
2179 case REQ_MOVE_FIRST_LINE:
2180 case REQ_MOVE_LAST_LINE:
2181 move_view(view, request);
2182 break;
2184 case REQ_SCROLL_LINE_DOWN:
2185 case REQ_SCROLL_LINE_UP:
2186 case REQ_SCROLL_PAGE_DOWN:
2187 case REQ_SCROLL_PAGE_UP:
2188 scroll_view(view, request);
2189 break;
2191 case REQ_VIEW_BLOB:
2192 if (!ref_blob[0]) {
2193 report("No file chosen, press %s to open tree view",
2194 get_key(REQ_VIEW_TREE));
2195 break;
2196 }
2197 open_view(view, request, OPEN_DEFAULT);
2198 break;
2200 case REQ_VIEW_PAGER:
2201 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2202 report("No pager content, press %s to run command from prompt",
2203 get_key(REQ_PROMPT));
2204 break;
2205 }
2206 open_view(view, request, OPEN_DEFAULT);
2207 break;
2209 case REQ_VIEW_MAIN:
2210 case REQ_VIEW_DIFF:
2211 case REQ_VIEW_LOG:
2212 case REQ_VIEW_TREE:
2213 case REQ_VIEW_HELP:
2214 case REQ_VIEW_STATUS:
2215 open_view(view, request, OPEN_DEFAULT);
2216 break;
2218 case REQ_NEXT:
2219 case REQ_PREVIOUS:
2220 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2222 if ((view == VIEW(REQ_VIEW_DIFF) &&
2223 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2224 (view == VIEW(REQ_VIEW_DIFF) &&
2225 view->parent == VIEW(REQ_VIEW_STATUS)) ||
2226 (view == VIEW(REQ_VIEW_BLOB) &&
2227 view->parent == VIEW(REQ_VIEW_TREE))) {
2228 int line;
2230 view = view->parent;
2231 line = view->lineno;
2232 move_view(view, request);
2233 if (view_is_displayed(view))
2234 update_view_title(view);
2235 if (line != view->lineno)
2236 view->ops->request(view, REQ_ENTER,
2237 &view->line[view->lineno]);
2239 } else {
2240 move_view(view, request);
2241 }
2242 break;
2244 case REQ_VIEW_NEXT:
2245 {
2246 int nviews = displayed_views();
2247 int next_view = (current_view + 1) % nviews;
2249 if (next_view == current_view) {
2250 report("Only one view is displayed");
2251 break;
2252 }
2254 current_view = next_view;
2255 /* Blur out the title of the previous view. */
2256 update_view_title(view);
2257 report("");
2258 break;
2259 }
2260 case REQ_TOGGLE_LINENO:
2261 opt_line_number = !opt_line_number;
2262 redraw_display();
2263 break;
2265 case REQ_TOGGLE_REV_GRAPH:
2266 opt_rev_graph = !opt_rev_graph;
2267 redraw_display();
2268 break;
2270 case REQ_PROMPT:
2271 /* Always reload^Wrerun commands from the prompt. */
2272 open_view(view, opt_request, OPEN_RELOAD);
2273 break;
2275 case REQ_SEARCH:
2276 case REQ_SEARCH_BACK:
2277 search_view(view, request);
2278 break;
2280 case REQ_FIND_NEXT:
2281 case REQ_FIND_PREV:
2282 find_next(view, request);
2283 break;
2285 case REQ_STOP_LOADING:
2286 for (i = 0; i < ARRAY_SIZE(views); i++) {
2287 view = &views[i];
2288 if (view->pipe)
2289 report("Stopped loading the %s view", view->name),
2290 end_update(view);
2291 }
2292 break;
2294 case REQ_SHOW_VERSION:
2295 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
2296 return TRUE;
2298 case REQ_SCREEN_RESIZE:
2299 resize_display();
2300 /* Fall-through */
2301 case REQ_SCREEN_REDRAW:
2302 redraw_display();
2303 break;
2305 case REQ_EDIT:
2306 report("Nothing to edit");
2307 break;
2309 case REQ_ENTER:
2310 report("Nothing to enter");
2311 break;
2313 case REQ_NONE:
2314 doupdate();
2315 return TRUE;
2317 case REQ_VIEW_CLOSE:
2318 /* XXX: Mark closed views by letting view->parent point to the
2319 * view itself. Parents to closed view should never be
2320 * followed. */
2321 if (view->parent &&
2322 view->parent->parent != view->parent) {
2323 memset(display, 0, sizeof(display));
2324 current_view = 0;
2325 display[current_view] = view->parent;
2326 view->parent = view;
2327 resize_display();
2328 redraw_display();
2329 break;
2330 }
2331 /* Fall-through */
2332 case REQ_QUIT:
2333 return FALSE;
2335 default:
2336 /* An unknown key will show most commonly used commands. */
2337 report("Unknown key, press 'h' for help");
2338 return TRUE;
2339 }
2341 return TRUE;
2342 }
2345 /*
2346 * Pager backend
2347 */
2349 static bool
2350 pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
2351 {
2352 char *text = line->data;
2353 enum line_type type = line->type;
2354 int textlen = strlen(text);
2355 int attr;
2357 wmove(view->win, lineno, 0);
2359 if (selected) {
2360 type = LINE_CURSOR;
2361 wchgat(view->win, -1, 0, type, NULL);
2362 }
2364 attr = get_line_attr(type);
2365 wattrset(view->win, attr);
2367 if (opt_line_number || opt_tab_size < TABSIZE) {
2368 static char spaces[] = " ";
2369 int col_offset = 0, col = 0;
2371 if (opt_line_number) {
2372 unsigned long real_lineno = view->offset + lineno + 1;
2374 if (real_lineno == 1 ||
2375 (real_lineno % opt_num_interval) == 0) {
2376 wprintw(view->win, "%.*d", view->digits, real_lineno);
2378 } else {
2379 waddnstr(view->win, spaces,
2380 MIN(view->digits, STRING_SIZE(spaces)));
2381 }
2382 waddstr(view->win, ": ");
2383 col_offset = view->digits + 2;
2384 }
2386 while (text && col_offset + col < view->width) {
2387 int cols_max = view->width - col_offset - col;
2388 char *pos = text;
2389 int cols;
2391 if (*text == '\t') {
2392 text++;
2393 assert(sizeof(spaces) > TABSIZE);
2394 pos = spaces;
2395 cols = opt_tab_size - (col % opt_tab_size);
2397 } else {
2398 text = strchr(text, '\t');
2399 cols = line ? text - pos : strlen(pos);
2400 }
2402 waddnstr(view->win, pos, MIN(cols, cols_max));
2403 col += cols;
2404 }
2406 } else {
2407 int col = 0, pos = 0;
2409 for (; pos < textlen && col < view->width; pos++, col++)
2410 if (text[pos] == '\t')
2411 col += TABSIZE - (col % TABSIZE) - 1;
2413 waddnstr(view->win, text, pos);
2414 }
2416 return TRUE;
2417 }
2419 static bool
2420 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2421 {
2422 char refbuf[SIZEOF_STR];
2423 char *ref = NULL;
2424 FILE *pipe;
2426 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2427 return TRUE;
2429 pipe = popen(refbuf, "r");
2430 if (!pipe)
2431 return TRUE;
2433 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2434 ref = chomp_string(ref);
2435 pclose(pipe);
2437 if (!ref || !*ref)
2438 return TRUE;
2440 /* This is the only fatal call, since it can "corrupt" the buffer. */
2441 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2442 return FALSE;
2444 return TRUE;
2445 }
2447 static void
2448 add_pager_refs(struct view *view, struct line *line)
2449 {
2450 char buf[SIZEOF_STR];
2451 char *commit_id = line->data + STRING_SIZE("commit ");
2452 struct ref **refs;
2453 size_t bufpos = 0, refpos = 0;
2454 const char *sep = "Refs: ";
2455 bool is_tag = FALSE;
2457 assert(line->type == LINE_COMMIT);
2459 refs = get_refs(commit_id);
2460 if (!refs) {
2461 if (view == VIEW(REQ_VIEW_DIFF))
2462 goto try_add_describe_ref;
2463 return;
2464 }
2466 do {
2467 struct ref *ref = refs[refpos];
2468 char *fmt = ref->tag ? "%s[%s]" :
2469 ref->remote ? "%s<%s>" : "%s%s";
2471 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2472 return;
2473 sep = ", ";
2474 if (ref->tag)
2475 is_tag = TRUE;
2476 } while (refs[refpos++]->next);
2478 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2479 try_add_describe_ref:
2480 /* Add <tag>-g<commit_id> "fake" reference. */
2481 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2482 return;
2483 }
2485 if (bufpos == 0)
2486 return;
2488 if (!realloc_lines(view, view->line_size + 1))
2489 return;
2491 add_line_text(view, buf, LINE_PP_REFS);
2492 }
2494 static bool
2495 pager_read(struct view *view, char *data)
2496 {
2497 struct line *line;
2499 if (!data)
2500 return TRUE;
2502 line = add_line_text(view, data, get_line_type(data));
2503 if (!line)
2504 return FALSE;
2506 if (line->type == LINE_COMMIT &&
2507 (view == VIEW(REQ_VIEW_DIFF) ||
2508 view == VIEW(REQ_VIEW_LOG)))
2509 add_pager_refs(view, line);
2511 return TRUE;
2512 }
2514 static enum request
2515 pager_request(struct view *view, enum request request, struct line *line)
2516 {
2517 int split = 0;
2519 if (request != REQ_ENTER)
2520 return request;
2522 if (line->type == LINE_COMMIT &&
2523 (view == VIEW(REQ_VIEW_LOG) ||
2524 view == VIEW(REQ_VIEW_PAGER))) {
2525 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2526 split = 1;
2527 }
2529 /* Always scroll the view even if it was split. That way
2530 * you can use Enter to scroll through the log view and
2531 * split open each commit diff. */
2532 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2534 /* FIXME: A minor workaround. Scrolling the view will call report("")
2535 * but if we are scrolling a non-current view this won't properly
2536 * update the view title. */
2537 if (split)
2538 update_view_title(view);
2540 return REQ_NONE;
2541 }
2543 static bool
2544 pager_grep(struct view *view, struct line *line)
2545 {
2546 regmatch_t pmatch;
2547 char *text = line->data;
2549 if (!*text)
2550 return FALSE;
2552 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
2553 return FALSE;
2555 return TRUE;
2556 }
2558 static void
2559 pager_select(struct view *view, struct line *line)
2560 {
2561 if (line->type == LINE_COMMIT) {
2562 char *text = line->data + STRING_SIZE("commit ");
2564 if (view != VIEW(REQ_VIEW_PAGER))
2565 string_copy_rev(view->ref, text);
2566 string_copy_rev(ref_commit, text);
2567 }
2568 }
2570 static struct view_ops pager_ops = {
2571 "line",
2572 NULL,
2573 pager_read,
2574 pager_draw,
2575 pager_request,
2576 pager_grep,
2577 pager_select,
2578 };
2581 /*
2582 * Help backend
2583 */
2585 static bool
2586 help_open(struct view *view)
2587 {
2588 char buf[BUFSIZ];
2589 int lines = ARRAY_SIZE(req_info) + 2;
2590 int i;
2592 if (view->lines > 0)
2593 return TRUE;
2595 for (i = 0; i < ARRAY_SIZE(req_info); i++)
2596 if (!req_info[i].request)
2597 lines++;
2599 view->line = calloc(lines, sizeof(*view->line));
2600 if (!view->line)
2601 return FALSE;
2603 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
2605 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
2606 char *key;
2608 if (!req_info[i].request) {
2609 add_line_text(view, "", LINE_DEFAULT);
2610 add_line_text(view, req_info[i].help, LINE_DEFAULT);
2611 continue;
2612 }
2614 key = get_key(req_info[i].request);
2615 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
2616 continue;
2618 add_line_text(view, buf, LINE_DEFAULT);
2619 }
2621 return TRUE;
2622 }
2624 static struct view_ops help_ops = {
2625 "line",
2626 help_open,
2627 NULL,
2628 pager_draw,
2629 pager_request,
2630 pager_grep,
2631 pager_select,
2632 };
2635 /*
2636 * Tree backend
2637 */
2639 struct tree_stack_entry {
2640 struct tree_stack_entry *prev; /* Entry below this in the stack */
2641 unsigned long lineno; /* Line number to restore */
2642 char *name; /* Position of name in opt_path */
2643 };
2645 /* The top of the path stack. */
2646 static struct tree_stack_entry *tree_stack = NULL;
2647 unsigned long tree_lineno = 0;
2649 static void
2650 pop_tree_stack_entry(void)
2651 {
2652 struct tree_stack_entry *entry = tree_stack;
2654 tree_lineno = entry->lineno;
2655 entry->name[0] = 0;
2656 tree_stack = entry->prev;
2657 free(entry);
2658 }
2660 static void
2661 push_tree_stack_entry(char *name, unsigned long lineno)
2662 {
2663 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
2664 size_t pathlen = strlen(opt_path);
2666 if (!entry)
2667 return;
2669 entry->prev = tree_stack;
2670 entry->name = opt_path + pathlen;
2671 tree_stack = entry;
2673 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
2674 pop_tree_stack_entry();
2675 return;
2676 }
2678 /* Move the current line to the first tree entry. */
2679 tree_lineno = 1;
2680 entry->lineno = lineno;
2681 }
2683 /* Parse output from git-ls-tree(1):
2684 *
2685 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2686 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2687 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2688 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2689 */
2691 #define SIZEOF_TREE_ATTR \
2692 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2694 #define TREE_UP_FORMAT "040000 tree %s\t.."
2696 static int
2697 tree_compare_entry(enum line_type type1, char *name1,
2698 enum line_type type2, char *name2)
2699 {
2700 if (type1 != type2) {
2701 if (type1 == LINE_TREE_DIR)
2702 return -1;
2703 return 1;
2704 }
2706 return strcmp(name1, name2);
2707 }
2709 static bool
2710 tree_read(struct view *view, char *text)
2711 {
2712 size_t textlen = text ? strlen(text) : 0;
2713 char buf[SIZEOF_STR];
2714 unsigned long pos;
2715 enum line_type type;
2716 bool first_read = view->lines == 0;
2718 if (textlen <= SIZEOF_TREE_ATTR)
2719 return FALSE;
2721 type = text[STRING_SIZE("100644 ")] == 't'
2722 ? LINE_TREE_DIR : LINE_TREE_FILE;
2724 if (first_read) {
2725 /* Add path info line */
2726 if (!string_format(buf, "Directory path /%s", opt_path) ||
2727 !realloc_lines(view, view->line_size + 1) ||
2728 !add_line_text(view, buf, LINE_DEFAULT))
2729 return FALSE;
2731 /* Insert "link" to parent directory. */
2732 if (*opt_path) {
2733 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
2734 !realloc_lines(view, view->line_size + 1) ||
2735 !add_line_text(view, buf, LINE_TREE_DIR))
2736 return FALSE;
2737 }
2738 }
2740 /* Strip the path part ... */
2741 if (*opt_path) {
2742 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2743 size_t striplen = strlen(opt_path);
2744 char *path = text + SIZEOF_TREE_ATTR;
2746 if (pathlen > striplen)
2747 memmove(path, path + striplen,
2748 pathlen - striplen + 1);
2749 }
2751 /* Skip "Directory ..." and ".." line. */
2752 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2753 struct line *line = &view->line[pos];
2754 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2755 char *path2 = text + SIZEOF_TREE_ATTR;
2756 int cmp = tree_compare_entry(line->type, path1, type, path2);
2758 if (cmp <= 0)
2759 continue;
2761 text = strdup(text);
2762 if (!text)
2763 return FALSE;
2765 if (view->lines > pos)
2766 memmove(&view->line[pos + 1], &view->line[pos],
2767 (view->lines - pos) * sizeof(*line));
2769 line = &view->line[pos];
2770 line->data = text;
2771 line->type = type;
2772 view->lines++;
2773 return TRUE;
2774 }
2776 if (!add_line_text(view, text, type))
2777 return FALSE;
2779 if (tree_lineno > view->lineno) {
2780 view->lineno = tree_lineno;
2781 tree_lineno = 0;
2782 }
2784 return TRUE;
2785 }
2787 static enum request
2788 tree_request(struct view *view, enum request request, struct line *line)
2789 {
2790 enum open_flags flags;
2792 if (request != REQ_ENTER)
2793 return request;
2795 /* Cleanup the stack if the tree view is at a different tree. */
2796 while (!*opt_path && tree_stack)
2797 pop_tree_stack_entry();
2799 switch (line->type) {
2800 case LINE_TREE_DIR:
2801 /* Depending on whether it is a subdir or parent (updir?) link
2802 * mangle the path buffer. */
2803 if (line == &view->line[1] && *opt_path) {
2804 pop_tree_stack_entry();
2806 } else {
2807 char *data = line->data;
2808 char *basename = data + SIZEOF_TREE_ATTR;
2810 push_tree_stack_entry(basename, view->lineno);
2811 }
2813 /* Trees and subtrees share the same ID, so they are not not
2814 * unique like blobs. */
2815 flags = OPEN_RELOAD;
2816 request = REQ_VIEW_TREE;
2817 break;
2819 case LINE_TREE_FILE:
2820 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2821 request = REQ_VIEW_BLOB;
2822 break;
2824 default:
2825 return TRUE;
2826 }
2828 open_view(view, request, flags);
2829 if (request == REQ_VIEW_TREE) {
2830 view->lineno = tree_lineno;
2831 }
2833 return REQ_NONE;
2834 }
2836 static void
2837 tree_select(struct view *view, struct line *line)
2838 {
2839 char *text = line->data + STRING_SIZE("100644 blob ");
2841 if (line->type == LINE_TREE_FILE) {
2842 string_copy_rev(ref_blob, text);
2844 } else if (line->type != LINE_TREE_DIR) {
2845 return;
2846 }
2848 string_copy_rev(view->ref, text);
2849 }
2851 static struct view_ops tree_ops = {
2852 "file",
2853 NULL,
2854 tree_read,
2855 pager_draw,
2856 tree_request,
2857 pager_grep,
2858 tree_select,
2859 };
2861 static bool
2862 blob_read(struct view *view, char *line)
2863 {
2864 return add_line_text(view, line, LINE_DEFAULT);
2865 }
2867 static struct view_ops blob_ops = {
2868 "line",
2869 NULL,
2870 blob_read,
2871 pager_draw,
2872 pager_request,
2873 pager_grep,
2874 pager_select,
2875 };
2878 /*
2879 * Status backend
2880 */
2882 struct status {
2883 char status;
2884 struct {
2885 mode_t mode;
2886 char rev[SIZEOF_REV];
2887 } old;
2888 struct {
2889 mode_t mode;
2890 char rev[SIZEOF_REV];
2891 } new;
2892 char name[SIZEOF_STR];
2893 };
2895 /* Get fields from the diff line:
2896 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
2897 */
2898 static inline bool
2899 status_get_diff(struct status *file, char *buf, size_t bufsize)
2900 {
2901 char *old_mode = buf + 1;
2902 char *new_mode = buf + 8;
2903 char *old_rev = buf + 15;
2904 char *new_rev = buf + 56;
2905 char *status = buf + 97;
2907 if (bufsize != 99 ||
2908 old_mode[-1] != ':' ||
2909 new_mode[-1] != ' ' ||
2910 old_rev[-1] != ' ' ||
2911 new_rev[-1] != ' ' ||
2912 status[-1] != ' ')
2913 return FALSE;
2915 file->status = *status;
2917 string_copy_rev(file->old.rev, old_rev);
2918 string_copy_rev(file->new.rev, new_rev);
2920 file->old.mode = strtoul(old_mode, NULL, 8);
2921 file->new.mode = strtoul(new_mode, NULL, 8);
2923 file->name[0] = 0;
2925 return TRUE;
2926 }
2928 static bool
2929 status_run(struct view *view, const char cmd[], bool diff, enum line_type type)
2930 {
2931 struct status *file = NULL;
2932 char buf[SIZEOF_STR * 4];
2933 size_t bufsize = 0;
2934 FILE *pipe;
2936 pipe = popen(cmd, "r");
2937 if (!pipe)
2938 return FALSE;
2940 add_line_data(view, NULL, type);
2942 while (!feof(pipe) && !ferror(pipe)) {
2943 char *sep;
2944 size_t readsize;
2946 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
2947 if (!readsize)
2948 break;
2949 bufsize += readsize;
2951 /* Process while we have NUL chars. */
2952 while ((sep = memchr(buf, 0, bufsize))) {
2953 size_t sepsize = sep - buf + 1;
2955 if (!file) {
2956 if (!realloc_lines(view, view->line_size + 1))
2957 goto error_out;
2959 file = calloc(1, sizeof(*file));
2960 if (!file)
2961 goto error_out;
2963 add_line_data(view, file, type);
2964 }
2966 /* Parse diff info part. */
2967 if (!diff) {
2968 file->status = '?';
2970 } else if (!file->status) {
2971 if (!status_get_diff(file, buf, sepsize))
2972 goto error_out;
2974 bufsize -= sepsize;
2975 memmove(buf, sep + 1, bufsize);
2977 sep = memchr(buf, 0, bufsize);
2978 if (!sep)
2979 break;
2980 sepsize = sep - buf + 1;
2981 }
2983 /* git-ls-files just delivers a NUL separated
2984 * list of file names similar to the second half
2985 * of the git-diff-* output. */
2986 string_ncopy(file->name, buf, sepsize);
2987 bufsize -= sepsize;
2988 memmove(buf, sep + 1, bufsize);
2989 file = NULL;
2990 }
2991 }
2993 if (ferror(pipe)) {
2994 error_out:
2995 pclose(pipe);
2996 return FALSE;
2997 }
2999 if (!view->line[view->lines - 1].data)
3000 add_line_data(view, NULL, LINE_STAT_NONE);
3002 pclose(pipe);
3003 return TRUE;
3004 }
3006 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --cached HEAD"
3007 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
3008 #define STATUS_LIST_OTHER_CMD \
3009 "git ls-files -z --others --exclude-per-directory=.gitignore"
3011 #define STATUS_DIFF_SHOW_CMD \
3012 "git diff --root --patch-with-stat --find-copies-harder -B -C %s -- %s 2>/dev/null"
3014 /* First parse staged info using git-diff-index(1), then parse unstaged
3015 * info using git-diff-files(1), and finally untracked files using
3016 * git-ls-files(1). */
3017 static bool
3018 status_open(struct view *view)
3019 {
3020 struct stat statbuf;
3021 char exclude[SIZEOF_STR];
3022 char cmd[SIZEOF_STR];
3023 size_t i;
3025 for (i = 0; i < view->lines; i++)
3026 free(view->line[i].data);
3027 free(view->line);
3028 view->lines = view->line_size = 0;
3029 view->line = NULL;
3031 if (!realloc_lines(view, view->line_size + 6))
3032 return FALSE;
3034 if (!string_format(exclude, "%s/info/exclude", opt_git_dir))
3035 return FALSE;
3037 string_copy(cmd, STATUS_LIST_OTHER_CMD);
3039 if (stat(exclude, &statbuf) >= 0) {
3040 size_t cmdsize = strlen(cmd);
3042 if (!string_format_from(cmd, &cmdsize, " %s", "--exclude-from=") ||
3043 sq_quote(cmd, cmdsize, exclude) >= sizeof(cmd))
3044 return FALSE;
3045 }
3047 if (!status_run(view, STATUS_DIFF_INDEX_CMD, TRUE, LINE_STAT_STAGED) ||
3048 !status_run(view, STATUS_DIFF_FILES_CMD, TRUE, LINE_STAT_UNSTAGED) ||
3049 !status_run(view, cmd, FALSE, LINE_STAT_UNTRACKED))
3050 return FALSE;
3052 return TRUE;
3053 }
3055 static bool
3056 status_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3057 {
3058 struct status *status = line->data;
3060 wmove(view->win, lineno, 0);
3062 if (selected) {
3063 wattrset(view->win, get_line_attr(LINE_CURSOR));
3064 wchgat(view->win, -1, 0, LINE_CURSOR, NULL);
3066 } else if (!status && line->type != LINE_STAT_NONE) {
3067 wattrset(view->win, get_line_attr(LINE_STAT_SECTION));
3068 wchgat(view->win, -1, 0, LINE_STAT_SECTION, NULL);
3070 } else {
3071 wattrset(view->win, get_line_attr(line->type));
3072 }
3074 if (!status) {
3075 char *text;
3077 switch (line->type) {
3078 case LINE_STAT_STAGED:
3079 text = "Changes to be committed:";
3080 break;
3082 case LINE_STAT_UNSTAGED:
3083 text = "Changed but not updated:";
3084 break;
3086 case LINE_STAT_UNTRACKED:
3087 text = "Untracked files:";
3088 break;
3090 case LINE_STAT_NONE:
3091 text = " (no files)";
3092 break;
3094 default:
3095 return FALSE;
3096 }
3098 waddstr(view->win, text);
3099 return TRUE;
3100 }
3102 waddch(view->win, status->status);
3103 if (!selected)
3104 wattrset(view->win, A_NORMAL);
3105 wmove(view->win, lineno, 4);
3106 waddstr(view->win, status->name);
3108 return TRUE;
3109 }
3111 static enum request
3112 status_enter(struct view *view, struct line *line)
3113 {
3114 struct status *status = line->data;
3115 char path[SIZEOF_STR] = "";
3116 char *info;
3117 size_t cmdsize = 0;
3119 if (line->type == LINE_STAT_NONE ||
3120 (!status && line[1].type == LINE_STAT_NONE)) {
3121 report("No file to diff");
3122 return REQ_NONE;
3123 }
3125 if (status && sq_quote(path, 0, status->name) >= sizeof(path))
3126 return REQ_QUIT;
3128 if (opt_cdup[0] &&
3129 line->type != LINE_STAT_UNTRACKED &&
3130 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
3131 return REQ_QUIT;
3133 switch (line->type) {
3134 case LINE_STAT_STAGED:
3135 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3136 "--cached", path))
3137 return REQ_QUIT;
3138 if (status)
3139 info = "Staged changes to %s";
3140 else
3141 info = "Staged changes";
3142 break;
3144 case LINE_STAT_UNSTAGED:
3145 if (!string_format_from(opt_cmd, &cmdsize, STATUS_DIFF_SHOW_CMD,
3146 "", path))
3147 return REQ_QUIT;
3148 if (status)
3149 info = "Unstaged changes to %s";
3150 else
3151 info = "Unstaged changes";
3152 break;
3154 case LINE_STAT_UNTRACKED:
3155 if (opt_pipe)
3156 return REQ_QUIT;
3159 if (!status) {
3160 report("No file to show");
3161 return REQ_NONE;
3162 }
3164 opt_pipe = fopen(status->name, "r");
3165 info = "Untracked file %s";
3166 break;
3168 default:
3169 die("w00t");
3170 }
3172 open_view(view, REQ_VIEW_DIFF, OPEN_RELOAD | OPEN_SPLIT);
3173 if (view_is_displayed(VIEW(REQ_VIEW_DIFF))) {
3174 string_format(VIEW(REQ_VIEW_DIFF)->ref, info, status->name);
3175 }
3177 return REQ_NONE;
3178 }
3181 static bool
3182 status_update_file(struct view *view, struct status *status, enum line_type type)
3183 {
3184 char cmd[SIZEOF_STR];
3185 char buf[SIZEOF_STR];
3186 size_t cmdsize = 0;
3187 size_t bufsize = 0;
3188 size_t written = 0;
3189 FILE *pipe;
3191 if (opt_cdup[0] &&
3192 type != LINE_STAT_UNTRACKED &&
3193 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
3194 return FALSE;
3196 switch (type) {
3197 case LINE_STAT_STAGED:
3198 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
3199 status->old.mode,
3200 status->old.rev,
3201 status->name, 0))
3202 return FALSE;
3204 string_add(cmd, cmdsize, "git update-index -z --index-info");
3205 break;
3207 case LINE_STAT_UNSTAGED:
3208 case LINE_STAT_UNTRACKED:
3209 if (!string_format_from(buf, &bufsize, "%s%c", status->name, 0))
3210 return FALSE;
3212 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
3213 break;
3215 default:
3216 die("w00t");
3217 }
3219 pipe = popen(cmd, "w");
3220 if (!pipe)
3221 return FALSE;
3223 while (!ferror(pipe) && written < bufsize) {
3224 written += fwrite(buf + written, 1, bufsize - written, pipe);
3225 }
3227 pclose(pipe);
3229 if (written != bufsize)
3230 return FALSE;
3232 return TRUE;
3233 }
3235 static void
3236 status_update(struct view *view)
3237 {
3238 struct line *line = &view->line[view->lineno];
3240 assert(view->lines);
3242 if (!line->data) {
3243 while (++line < view->line + view->lines && line->data) {
3244 if (!status_update_file(view, line->data, line->type))
3245 report("Failed to update file status");
3246 }
3248 if (!line[-1].data) {
3249 report("Nothing to update");
3250 return;
3251 }
3253 } else if (!status_update_file(view, line->data, line->type)) {
3254 report("Failed to update file status");
3255 }
3257 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
3258 }
3260 static enum request
3261 status_request(struct view *view, enum request request, struct line *line)
3262 {
3263 struct status *status = line->data;
3265 switch (request) {
3266 case REQ_STATUS_UPDATE:
3267 status_update(view);
3268 break;
3270 case REQ_EDIT:
3271 if (!status)
3272 return request;
3274 open_editor(view, status->name);
3275 break;
3277 case REQ_ENTER:
3278 status_enter(view, line);
3279 break;
3281 default:
3282 return request;
3283 }
3285 return REQ_NONE;
3286 }
3288 static void
3289 status_select(struct view *view, struct line *line)
3290 {
3291 struct status *status = line->data;
3292 char file[SIZEOF_STR] = "all files";
3293 char *text;
3295 if (status && !string_format(file, "'%s'", status->name))
3296 return;
3298 if (!status && line[1].type == LINE_STAT_NONE)
3299 line++;
3301 switch (line->type) {
3302 case LINE_STAT_STAGED:
3303 text = "Press %s to unstage %s for commit";
3304 break;
3306 case LINE_STAT_UNSTAGED:
3307 text = "Press %s to stage %s for commit";
3308 break;
3310 case LINE_STAT_UNTRACKED:
3311 text = "Press %s to stage %s for addition";
3312 break;
3314 case LINE_STAT_NONE:
3315 text = "Nothing to update";
3316 break;
3318 default:
3319 die("w00t");
3320 }
3322 string_format(view->ref, text, get_key(REQ_STATUS_UPDATE), file);
3323 }
3325 static bool
3326 status_grep(struct view *view, struct line *line)
3327 {
3328 struct status *status = line->data;
3329 enum { S_STATUS, S_NAME, S_END } state;
3330 char buf[2] = "?";
3331 regmatch_t pmatch;
3333 if (!status)
3334 return FALSE;
3336 for (state = S_STATUS; state < S_END; state++) {
3337 char *text;
3339 switch (state) {
3340 case S_NAME: text = status->name; break;
3341 case S_STATUS:
3342 buf[0] = status->status;
3343 text = buf;
3344 break;
3346 default:
3347 return FALSE;
3348 }
3350 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3351 return TRUE;
3352 }
3354 return FALSE;
3355 }
3357 static struct view_ops status_ops = {
3358 "file",
3359 status_open,
3360 NULL,
3361 status_draw,
3362 status_request,
3363 status_grep,
3364 status_select,
3365 };
3368 /*
3369 * Revision graph
3370 */
3372 struct commit {
3373 char id[SIZEOF_REV]; /* SHA1 ID. */
3374 char title[128]; /* First line of the commit message. */
3375 char author[75]; /* Author of the commit. */
3376 struct tm time; /* Date from the author ident. */
3377 struct ref **refs; /* Repository references. */
3378 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
3379 size_t graph_size; /* The width of the graph array. */
3380 };
3382 /* Size of rev graph with no "padding" columns */
3383 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
3385 struct rev_graph {
3386 struct rev_graph *prev, *next, *parents;
3387 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
3388 size_t size;
3389 struct commit *commit;
3390 size_t pos;
3391 };
3393 /* Parents of the commit being visualized. */
3394 static struct rev_graph graph_parents[4];
3396 /* The current stack of revisions on the graph. */
3397 static struct rev_graph graph_stacks[4] = {
3398 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
3399 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
3400 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
3401 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
3402 };
3404 static inline bool
3405 graph_parent_is_merge(struct rev_graph *graph)
3406 {
3407 return graph->parents->size > 1;
3408 }
3410 static inline void
3411 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
3412 {
3413 struct commit *commit = graph->commit;
3415 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
3416 commit->graph[commit->graph_size++] = symbol;
3417 }
3419 static void
3420 done_rev_graph(struct rev_graph *graph)
3421 {
3422 if (graph_parent_is_merge(graph) &&
3423 graph->pos < graph->size - 1 &&
3424 graph->next->size == graph->size + graph->parents->size - 1) {
3425 size_t i = graph->pos + graph->parents->size - 1;
3427 graph->commit->graph_size = i * 2;
3428 while (i < graph->next->size - 1) {
3429 append_to_rev_graph(graph, ' ');
3430 append_to_rev_graph(graph, '\\');
3431 i++;
3432 }
3433 }
3435 graph->size = graph->pos = 0;
3436 graph->commit = NULL;
3437 memset(graph->parents, 0, sizeof(*graph->parents));
3438 }
3440 static void
3441 push_rev_graph(struct rev_graph *graph, char *parent)
3442 {
3443 int i;
3445 /* "Collapse" duplicate parents lines.
3446 *
3447 * FIXME: This needs to also update update the drawn graph but
3448 * for now it just serves as a method for pruning graph lines. */
3449 for (i = 0; i < graph->size; i++)
3450 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
3451 return;
3453 if (graph->size < SIZEOF_REVITEMS) {
3454 string_copy_rev(graph->rev[graph->size++], parent);
3455 }
3456 }
3458 static chtype
3459 get_rev_graph_symbol(struct rev_graph *graph)
3460 {
3461 chtype symbol;
3463 if (graph->parents->size == 0)
3464 symbol = REVGRAPH_INIT;
3465 else if (graph_parent_is_merge(graph))
3466 symbol = REVGRAPH_MERGE;
3467 else if (graph->pos >= graph->size)
3468 symbol = REVGRAPH_BRANCH;
3469 else
3470 symbol = REVGRAPH_COMMIT;
3472 return symbol;
3473 }
3475 static void
3476 draw_rev_graph(struct rev_graph *graph)
3477 {
3478 struct rev_filler {
3479 chtype separator, line;
3480 };
3481 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
3482 static struct rev_filler fillers[] = {
3483 { ' ', REVGRAPH_LINE },
3484 { '`', '.' },
3485 { '\'', ' ' },
3486 { '/', ' ' },
3487 };
3488 chtype symbol = get_rev_graph_symbol(graph);
3489 struct rev_filler *filler;
3490 size_t i;
3492 filler = &fillers[DEFAULT];
3494 for (i = 0; i < graph->pos; i++) {
3495 append_to_rev_graph(graph, filler->line);
3496 if (graph_parent_is_merge(graph->prev) &&
3497 graph->prev->pos == i)
3498 filler = &fillers[RSHARP];
3500 append_to_rev_graph(graph, filler->separator);
3501 }
3503 /* Place the symbol for this revision. */
3504 append_to_rev_graph(graph, symbol);
3506 if (graph->prev->size > graph->size)
3507 filler = &fillers[RDIAG];
3508 else
3509 filler = &fillers[DEFAULT];
3511 i++;
3513 for (; i < graph->size; i++) {
3514 append_to_rev_graph(graph, filler->separator);
3515 append_to_rev_graph(graph, filler->line);
3516 if (graph_parent_is_merge(graph->prev) &&
3517 i < graph->prev->pos + graph->parents->size)
3518 filler = &fillers[RSHARP];
3519 if (graph->prev->size > graph->size)
3520 filler = &fillers[LDIAG];
3521 }
3523 if (graph->prev->size > graph->size) {
3524 append_to_rev_graph(graph, filler->separator);
3525 if (filler->line != ' ')
3526 append_to_rev_graph(graph, filler->line);
3527 }
3528 }
3530 /* Prepare the next rev graph */
3531 static void
3532 prepare_rev_graph(struct rev_graph *graph)
3533 {
3534 size_t i;
3536 /* First, traverse all lines of revisions up to the active one. */
3537 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
3538 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
3539 break;
3541 push_rev_graph(graph->next, graph->rev[graph->pos]);
3542 }
3544 /* Interleave the new revision parent(s). */
3545 for (i = 0; i < graph->parents->size; i++)
3546 push_rev_graph(graph->next, graph->parents->rev[i]);
3548 /* Lastly, put any remaining revisions. */
3549 for (i = graph->pos + 1; i < graph->size; i++)
3550 push_rev_graph(graph->next, graph->rev[i]);
3551 }
3553 static void
3554 update_rev_graph(struct rev_graph *graph)
3555 {
3556 /* If this is the finalizing update ... */
3557 if (graph->commit)
3558 prepare_rev_graph(graph);
3560 /* Graph visualization needs a one rev look-ahead,
3561 * so the first update doesn't visualize anything. */
3562 if (!graph->prev->commit)
3563 return;
3565 draw_rev_graph(graph->prev);
3566 done_rev_graph(graph->prev->prev);
3567 }
3570 /*
3571 * Main view backend
3572 */
3574 static bool
3575 main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
3576 {
3577 char buf[DATE_COLS + 1];
3578 struct commit *commit = line->data;
3579 enum line_type type;
3580 int col = 0;
3581 size_t timelen;
3582 size_t authorlen;
3583 int trimmed = 1;
3585 if (!*commit->author)
3586 return FALSE;
3588 wmove(view->win, lineno, col);
3590 if (selected) {
3591 type = LINE_CURSOR;
3592 wattrset(view->win, get_line_attr(type));
3593 wchgat(view->win, -1, 0, type, NULL);
3595 } else {
3596 type = LINE_MAIN_COMMIT;
3597 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
3598 }
3600 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
3601 waddnstr(view->win, buf, timelen);
3602 waddstr(view->win, " ");
3604 col += DATE_COLS;
3605 wmove(view->win, lineno, col);
3606 if (type != LINE_CURSOR)
3607 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
3609 if (opt_utf8) {
3610 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
3611 } else {
3612 authorlen = strlen(commit->author);
3613 if (authorlen > AUTHOR_COLS - 2) {
3614 authorlen = AUTHOR_COLS - 2;
3615 trimmed = 1;
3616 }
3617 }
3619 if (trimmed) {
3620 waddnstr(view->win, commit->author, authorlen);
3621 if (type != LINE_CURSOR)
3622 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
3623 waddch(view->win, '~');
3624 } else {
3625 waddstr(view->win, commit->author);
3626 }
3628 col += AUTHOR_COLS;
3629 if (type != LINE_CURSOR)
3630 wattrset(view->win, A_NORMAL);
3632 if (opt_rev_graph && commit->graph_size) {
3633 size_t i;
3635 wmove(view->win, lineno, col);
3636 /* Using waddch() instead of waddnstr() ensures that
3637 * they'll be rendered correctly for the cursor line. */
3638 for (i = 0; i < commit->graph_size; i++)
3639 waddch(view->win, commit->graph[i]);
3641 waddch(view->win, ' ');
3642 col += commit->graph_size + 1;
3643 }
3645 wmove(view->win, lineno, col);
3647 if (commit->refs) {
3648 size_t i = 0;
3650 do {
3651 if (type == LINE_CURSOR)
3652 ;
3653 else if (commit->refs[i]->tag)
3654 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
3655 else if (commit->refs[i]->remote)
3656 wattrset(view->win, get_line_attr(LINE_MAIN_REMOTE));
3657 else
3658 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
3659 waddstr(view->win, "[");
3660 waddstr(view->win, commit->refs[i]->name);
3661 waddstr(view->win, "]");
3662 if (type != LINE_CURSOR)
3663 wattrset(view->win, A_NORMAL);
3664 waddstr(view->win, " ");
3665 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
3666 } while (commit->refs[i++]->next);
3667 }
3669 if (type != LINE_CURSOR)
3670 wattrset(view->win, get_line_attr(type));
3672 {
3673 int titlelen = strlen(commit->title);
3675 if (col + titlelen > view->width)
3676 titlelen = view->width - col;
3678 waddnstr(view->win, commit->title, titlelen);
3679 }
3681 return TRUE;
3682 }
3684 /* Reads git log --pretty=raw output and parses it into the commit struct. */
3685 static bool
3686 main_read(struct view *view, char *line)
3687 {
3688 static struct rev_graph *graph = graph_stacks;
3689 enum line_type type;
3690 struct commit *commit;
3692 if (!line) {
3693 update_rev_graph(graph);
3694 return TRUE;
3695 }
3697 type = get_line_type(line);
3698 if (type == LINE_COMMIT) {
3699 commit = calloc(1, sizeof(struct commit));
3700 if (!commit)
3701 return FALSE;
3703 string_copy_rev(commit->id, line + STRING_SIZE("commit "));
3704 commit->refs = get_refs(commit->id);
3705 graph->commit = commit;
3706 add_line_data(view, commit, LINE_MAIN_COMMIT);
3707 return TRUE;
3708 }
3710 if (!view->lines)
3711 return TRUE;
3712 commit = view->line[view->lines - 1].data;
3714 switch (type) {
3715 case LINE_PARENT:
3716 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
3717 break;
3719 case LINE_AUTHOR:
3720 {
3721 /* Parse author lines where the name may be empty:
3722 * author <email@address.tld> 1138474660 +0100
3723 */
3724 char *ident = line + STRING_SIZE("author ");
3725 char *nameend = strchr(ident, '<');
3726 char *emailend = strchr(ident, '>');
3728 if (!nameend || !emailend)
3729 break;
3731 update_rev_graph(graph);
3732 graph = graph->next;
3734 *nameend = *emailend = 0;
3735 ident = chomp_string(ident);
3736 if (!*ident) {
3737 ident = chomp_string(nameend + 1);
3738 if (!*ident)
3739 ident = "Unknown";
3740 }
3742 string_ncopy(commit->author, ident, strlen(ident));
3744 /* Parse epoch and timezone */
3745 if (emailend[1] == ' ') {
3746 char *secs = emailend + 2;
3747 char *zone = strchr(secs, ' ');
3748 time_t time = (time_t) atol(secs);
3750 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
3751 long tz;
3753 zone++;
3754 tz = ('0' - zone[1]) * 60 * 60 * 10;
3755 tz += ('0' - zone[2]) * 60 * 60;
3756 tz += ('0' - zone[3]) * 60;
3757 tz += ('0' - zone[4]) * 60;
3759 if (zone[0] == '-')
3760 tz = -tz;
3762 time -= tz;
3763 }
3765 gmtime_r(&time, &commit->time);
3766 }
3767 break;
3768 }
3769 default:
3770 /* Fill in the commit title if it has not already been set. */
3771 if (commit->title[0])
3772 break;
3774 /* Require titles to start with a non-space character at the
3775 * offset used by git log. */
3776 if (strncmp(line, " ", 4))
3777 break;
3778 line += 4;
3779 /* Well, if the title starts with a whitespace character,
3780 * try to be forgiving. Otherwise we end up with no title. */
3781 while (isspace(*line))
3782 line++;
3783 if (*line == '\0')
3784 break;
3785 /* FIXME: More graceful handling of titles; append "..." to
3786 * shortened titles, etc. */
3788 string_ncopy(commit->title, line, strlen(line));
3789 }
3791 return TRUE;
3792 }
3794 static enum request
3795 main_request(struct view *view, enum request request, struct line *line)
3796 {
3797 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3799 if (request == REQ_ENTER)
3800 open_view(view, REQ_VIEW_DIFF, flags);
3801 else
3802 return request;
3804 return REQ_NONE;
3805 }
3807 static bool
3808 main_grep(struct view *view, struct line *line)
3809 {
3810 struct commit *commit = line->data;
3811 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
3812 char buf[DATE_COLS + 1];
3813 regmatch_t pmatch;
3815 for (state = S_TITLE; state < S_END; state++) {
3816 char *text;
3818 switch (state) {
3819 case S_TITLE: text = commit->title; break;
3820 case S_AUTHOR: text = commit->author; break;
3821 case S_DATE:
3822 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
3823 continue;
3824 text = buf;
3825 break;
3827 default:
3828 return FALSE;
3829 }
3831 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3832 return TRUE;
3833 }
3835 return FALSE;
3836 }
3838 static void
3839 main_select(struct view *view, struct line *line)
3840 {
3841 struct commit *commit = line->data;
3843 string_copy_rev(view->ref, commit->id);
3844 string_copy_rev(ref_commit, view->ref);
3845 }
3847 static struct view_ops main_ops = {
3848 "commit",
3849 NULL,
3850 main_read,
3851 main_draw,
3852 main_request,
3853 main_grep,
3854 main_select,
3855 };
3858 /*
3859 * Unicode / UTF-8 handling
3860 *
3861 * NOTE: Much of the following code for dealing with unicode is derived from
3862 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
3863 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
3864 */
3866 /* I've (over)annotated a lot of code snippets because I am not entirely
3867 * confident that the approach taken by this small UTF-8 interface is correct.
3868 * --jonas */
3870 static inline int
3871 unicode_width(unsigned long c)
3872 {
3873 if (c >= 0x1100 &&
3874 (c <= 0x115f /* Hangul Jamo */
3875 || c == 0x2329
3876 || c == 0x232a
3877 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
3878 /* CJK ... Yi */
3879 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
3880 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
3881 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
3882 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
3883 || (c >= 0xffe0 && c <= 0xffe6)
3884 || (c >= 0x20000 && c <= 0x2fffd)
3885 || (c >= 0x30000 && c <= 0x3fffd)))
3886 return 2;
3888 return 1;
3889 }
3891 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
3892 * Illegal bytes are set one. */
3893 static const unsigned char utf8_bytes[256] = {
3894 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,
3895 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,
3896 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,
3897 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,
3898 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,
3899 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,
3900 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,
3901 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,
3902 };
3904 /* Decode UTF-8 multi-byte representation into a unicode character. */
3905 static inline unsigned long
3906 utf8_to_unicode(const char *string, size_t length)
3907 {
3908 unsigned long unicode;
3910 switch (length) {
3911 case 1:
3912 unicode = string[0];
3913 break;
3914 case 2:
3915 unicode = (string[0] & 0x1f) << 6;
3916 unicode += (string[1] & 0x3f);
3917 break;
3918 case 3:
3919 unicode = (string[0] & 0x0f) << 12;
3920 unicode += ((string[1] & 0x3f) << 6);
3921 unicode += (string[2] & 0x3f);
3922 break;
3923 case 4:
3924 unicode = (string[0] & 0x0f) << 18;
3925 unicode += ((string[1] & 0x3f) << 12);
3926 unicode += ((string[2] & 0x3f) << 6);
3927 unicode += (string[3] & 0x3f);
3928 break;
3929 case 5:
3930 unicode = (string[0] & 0x0f) << 24;
3931 unicode += ((string[1] & 0x3f) << 18);
3932 unicode += ((string[2] & 0x3f) << 12);
3933 unicode += ((string[3] & 0x3f) << 6);
3934 unicode += (string[4] & 0x3f);
3935 break;
3936 case 6:
3937 unicode = (string[0] & 0x01) << 30;
3938 unicode += ((string[1] & 0x3f) << 24);
3939 unicode += ((string[2] & 0x3f) << 18);
3940 unicode += ((string[3] & 0x3f) << 12);
3941 unicode += ((string[4] & 0x3f) << 6);
3942 unicode += (string[5] & 0x3f);
3943 break;
3944 default:
3945 die("Invalid unicode length");
3946 }
3948 /* Invalid characters could return the special 0xfffd value but NUL
3949 * should be just as good. */
3950 return unicode > 0xffff ? 0 : unicode;
3951 }
3953 /* Calculates how much of string can be shown within the given maximum width
3954 * and sets trimmed parameter to non-zero value if all of string could not be
3955 * shown.
3956 *
3957 * Additionally, adds to coloffset how many many columns to move to align with
3958 * the expected position. Takes into account how multi-byte and double-width
3959 * characters will effect the cursor position.
3960 *
3961 * Returns the number of bytes to output from string to satisfy max_width. */
3962 static size_t
3963 utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3964 {
3965 const char *start = string;
3966 const char *end = strchr(string, '\0');
3967 size_t mbwidth = 0;
3968 size_t width = 0;
3970 *trimmed = 0;
3972 while (string < end) {
3973 int c = *(unsigned char *) string;
3974 unsigned char bytes = utf8_bytes[c];
3975 size_t ucwidth;
3976 unsigned long unicode;
3978 if (string + bytes > end)
3979 break;
3981 /* Change representation to figure out whether
3982 * it is a single- or double-width character. */
3984 unicode = utf8_to_unicode(string, bytes);
3985 /* FIXME: Graceful handling of invalid unicode character. */
3986 if (!unicode)
3987 break;
3989 ucwidth = unicode_width(unicode);
3990 width += ucwidth;
3991 if (width > max_width) {
3992 *trimmed = 1;
3993 break;
3994 }
3996 /* The column offset collects the differences between the
3997 * number of bytes encoding a character and the number of
3998 * columns will be used for rendering said character.
3999 *
4000 * So if some character A is encoded in 2 bytes, but will be
4001 * represented on the screen using only 1 byte this will and up
4002 * adding 1 to the multi-byte column offset.
4003 *
4004 * Assumes that no double-width character can be encoding in
4005 * less than two bytes. */
4006 if (bytes > ucwidth)
4007 mbwidth += bytes - ucwidth;
4009 string += bytes;
4010 }
4012 *coloffset += mbwidth;
4014 return string - start;
4015 }
4018 /*
4019 * Status management
4020 */
4022 /* Whether or not the curses interface has been initialized. */
4023 static bool cursed = FALSE;
4025 /* The status window is used for polling keystrokes. */
4026 static WINDOW *status_win;
4028 static bool status_empty = TRUE;
4030 /* Update status and title window. */
4031 static void
4032 report(const char *msg, ...)
4033 {
4034 struct view *view = display[current_view];
4036 if (input_mode)
4037 return;
4039 if (!status_empty || *msg) {
4040 va_list args;
4042 va_start(args, msg);
4044 wmove(status_win, 0, 0);
4045 if (*msg) {
4046 vwprintw(status_win, msg, args);
4047 status_empty = FALSE;
4048 } else {
4049 status_empty = TRUE;
4050 }
4051 wclrtoeol(status_win);
4052 wrefresh(status_win);
4054 va_end(args);
4055 }
4057 update_view_title(view);
4058 update_display_cursor(view);
4059 }
4061 /* Controls when nodelay should be in effect when polling user input. */
4062 static void
4063 set_nonblocking_input(bool loading)
4064 {
4065 static unsigned int loading_views;
4067 if ((loading == FALSE && loading_views-- == 1) ||
4068 (loading == TRUE && loading_views++ == 0))
4069 nodelay(status_win, loading);
4070 }
4072 static void
4073 init_display(void)
4074 {
4075 int x, y;
4077 /* Initialize the curses library */
4078 if (isatty(STDIN_FILENO)) {
4079 cursed = !!initscr();
4080 } else {
4081 /* Leave stdin and stdout alone when acting as a pager. */
4082 FILE *io = fopen("/dev/tty", "r+");
4084 if (!io)
4085 die("Failed to open /dev/tty");
4086 cursed = !!newterm(NULL, io, io);
4087 }
4089 if (!cursed)
4090 die("Failed to initialize curses");
4092 nonl(); /* Tell curses not to do NL->CR/NL on output */
4093 cbreak(); /* Take input chars one at a time, no wait for \n */
4094 noecho(); /* Don't echo input */
4095 leaveok(stdscr, TRUE);
4097 if (has_colors())
4098 init_colors();
4100 getmaxyx(stdscr, y, x);
4101 status_win = newwin(1, 0, y - 1, 0);
4102 if (!status_win)
4103 die("Failed to create status window");
4105 /* Enable keyboard mapping */
4106 keypad(status_win, TRUE);
4107 wbkgdset(status_win, get_line_attr(LINE_STATUS));
4108 }
4110 static char *
4111 read_prompt(const char *prompt)
4112 {
4113 enum { READING, STOP, CANCEL } status = READING;
4114 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
4115 int pos = 0;
4117 while (status == READING) {
4118 struct view *view;
4119 int i, key;
4121 input_mode = TRUE;
4123 foreach_view (view, i)
4124 update_view(view);
4126 input_mode = FALSE;
4128 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
4129 wclrtoeol(status_win);
4131 /* Refresh, accept single keystroke of input */
4132 key = wgetch(status_win);
4133 switch (key) {
4134 case KEY_RETURN:
4135 case KEY_ENTER:
4136 case '\n':
4137 status = pos ? STOP : CANCEL;
4138 break;
4140 case KEY_BACKSPACE:
4141 if (pos > 0)
4142 pos--;
4143 else
4144 status = CANCEL;
4145 break;
4147 case KEY_ESC:
4148 status = CANCEL;
4149 break;
4151 case ERR:
4152 break;
4154 default:
4155 if (pos >= sizeof(buf)) {
4156 report("Input string too long");
4157 return NULL;
4158 }
4160 if (isprint(key))
4161 buf[pos++] = (char) key;
4162 }
4163 }
4165 /* Clear the status window */
4166 status_empty = FALSE;
4167 report("");
4169 if (status == CANCEL)
4170 return NULL;
4172 buf[pos++] = 0;
4174 return buf;
4175 }
4177 /*
4178 * Repository references
4179 */
4181 static struct ref *refs;
4182 static size_t refs_size;
4184 /* Id <-> ref store */
4185 static struct ref ***id_refs;
4186 static size_t id_refs_size;
4188 static struct ref **
4189 get_refs(char *id)
4190 {
4191 struct ref ***tmp_id_refs;
4192 struct ref **ref_list = NULL;
4193 size_t ref_list_size = 0;
4194 size_t i;
4196 for (i = 0; i < id_refs_size; i++)
4197 if (!strcmp(id, id_refs[i][0]->id))
4198 return id_refs[i];
4200 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
4201 if (!tmp_id_refs)
4202 return NULL;
4204 id_refs = tmp_id_refs;
4206 for (i = 0; i < refs_size; i++) {
4207 struct ref **tmp;
4209 if (strcmp(id, refs[i].id))
4210 continue;
4212 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
4213 if (!tmp) {
4214 if (ref_list)
4215 free(ref_list);
4216 return NULL;
4217 }
4219 ref_list = tmp;
4220 if (ref_list_size > 0)
4221 ref_list[ref_list_size - 1]->next = 1;
4222 ref_list[ref_list_size] = &refs[i];
4224 /* XXX: The properties of the commit chains ensures that we can
4225 * safely modify the shared ref. The repo references will
4226 * always be similar for the same id. */
4227 ref_list[ref_list_size]->next = 0;
4228 ref_list_size++;
4229 }
4231 if (ref_list)
4232 id_refs[id_refs_size++] = ref_list;
4234 return ref_list;
4235 }
4237 static int
4238 read_ref(char *id, size_t idlen, char *name, size_t namelen)
4239 {
4240 struct ref *ref;
4241 bool tag = FALSE;
4242 bool remote = FALSE;
4244 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
4245 /* Commits referenced by tags has "^{}" appended. */
4246 if (name[namelen - 1] != '}')
4247 return OK;
4249 while (namelen > 0 && name[namelen] != '^')
4250 namelen--;
4252 tag = TRUE;
4253 namelen -= STRING_SIZE("refs/tags/");
4254 name += STRING_SIZE("refs/tags/");
4256 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
4257 remote = TRUE;
4258 namelen -= STRING_SIZE("refs/remotes/");
4259 name += STRING_SIZE("refs/remotes/");
4261 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
4262 namelen -= STRING_SIZE("refs/heads/");
4263 name += STRING_SIZE("refs/heads/");
4265 } else if (!strcmp(name, "HEAD")) {
4266 return OK;
4267 }
4269 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
4270 if (!refs)
4271 return ERR;
4273 ref = &refs[refs_size++];
4274 ref->name = malloc(namelen + 1);
4275 if (!ref->name)
4276 return ERR;
4278 strncpy(ref->name, name, namelen);
4279 ref->name[namelen] = 0;
4280 ref->tag = tag;
4281 ref->remote = remote;
4282 string_copy_rev(ref->id, id);
4284 return OK;
4285 }
4287 static int
4288 load_refs(void)
4289 {
4290 const char *cmd_env = getenv("TIG_LS_REMOTE");
4291 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
4293 return read_properties(popen(cmd, "r"), "\t", read_ref);
4294 }
4296 static int
4297 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
4298 {
4299 if (!strcmp(name, "i18n.commitencoding"))
4300 string_ncopy(opt_encoding, value, valuelen);
4302 if (!strcmp(name, "core.editor"))
4303 string_ncopy(opt_editor, value, valuelen);
4305 return OK;
4306 }
4308 static int
4309 load_repo_config(void)
4310 {
4311 return read_properties(popen(GIT_CONFIG " --list", "r"),
4312 "=", read_repo_config_option);
4313 }
4315 static int
4316 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
4317 {
4318 if (!opt_git_dir[0])
4319 string_ncopy(opt_git_dir, name, namelen);
4320 else
4321 string_ncopy(opt_cdup, name, namelen);
4322 return OK;
4323 }
4325 /* XXX: The line outputted by "--show-cdup" can be empty so the option
4326 * must be the last one! */
4327 static int
4328 load_repo_info(void)
4329 {
4330 return read_properties(popen("git rev-parse --git-dir --show-cdup 2>/dev/null", "r"),
4331 "=", read_repo_info);
4332 }
4334 static int
4335 read_properties(FILE *pipe, const char *separators,
4336 int (*read_property)(char *, size_t, char *, size_t))
4337 {
4338 char buffer[BUFSIZ];
4339 char *name;
4340 int state = OK;
4342 if (!pipe)
4343 return ERR;
4345 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4346 char *value;
4347 size_t namelen;
4348 size_t valuelen;
4350 name = chomp_string(name);
4351 namelen = strcspn(name, separators);
4353 if (name[namelen]) {
4354 name[namelen] = 0;
4355 value = chomp_string(name + namelen + 1);
4356 valuelen = strlen(value);
4358 } else {
4359 value = "";
4360 valuelen = 0;
4361 }
4363 state = read_property(name, namelen, value, valuelen);
4364 }
4366 if (state != ERR && ferror(pipe))
4367 state = ERR;
4369 pclose(pipe);
4371 return state;
4372 }
4375 /*
4376 * Main
4377 */
4379 static void __NORETURN
4380 quit(int sig)
4381 {
4382 /* XXX: Restore tty modes and let the OS cleanup the rest! */
4383 if (cursed)
4384 endwin();
4385 exit(0);
4386 }
4388 static void __NORETURN
4389 die(const char *err, ...)
4390 {
4391 va_list args;
4393 endwin();
4395 va_start(args, err);
4396 fputs("tig: ", stderr);
4397 vfprintf(stderr, err, args);
4398 fputs("\n", stderr);
4399 va_end(args);
4401 exit(1);
4402 }
4404 int
4405 main(int argc, char *argv[])
4406 {
4407 struct view *view;
4408 enum request request;
4409 size_t i;
4411 signal(SIGINT, quit);
4413 if (setlocale(LC_ALL, "")) {
4414 char *codeset = nl_langinfo(CODESET);
4416 string_ncopy(opt_codeset, codeset, strlen(codeset));
4417 }
4419 if (load_repo_info() == ERR)
4420 die("Failed to load repo info.");
4422 /* Require a git repository unless when running in pager mode. */
4423 if (!opt_git_dir[0])
4424 die("Not a git repository");
4426 if (load_options() == ERR)
4427 die("Failed to load user config.");
4429 /* Load the repo config file so options can be overwritten from
4430 * the command line. */
4431 if (load_repo_config() == ERR)
4432 die("Failed to load repo config.");
4434 if (!parse_options(argc, argv))
4435 return 0;
4437 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
4438 opt_iconv = iconv_open(opt_codeset, opt_encoding);
4439 if (opt_iconv == ICONV_NONE)
4440 die("Failed to initialize character set conversion");
4441 }
4443 if (load_refs() == ERR)
4444 die("Failed to load refs.");
4446 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
4447 view->cmd_env = getenv(view->cmd_env);
4449 request = opt_request;
4451 init_display();
4453 while (view_driver(display[current_view], request)) {
4454 int key;
4455 int i;
4457 foreach_view (view, i)
4458 update_view(view);
4460 /* Refresh, accept single keystroke of input */
4461 key = wgetch(status_win);
4463 /* wgetch() with nodelay() enabled returns ERR when there's no
4464 * input. */
4465 if (key == ERR) {
4466 request = REQ_NONE;
4467 continue;
4468 }
4470 request = get_keybinding(display[current_view]->keymap, key);
4472 /* Some low-level request handling. This keeps access to
4473 * status_win restricted. */
4474 switch (request) {
4475 case REQ_PROMPT:
4476 {
4477 char *cmd = read_prompt(":");
4479 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
4480 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
4481 opt_request = REQ_VIEW_DIFF;
4482 } else {
4483 opt_request = REQ_VIEW_PAGER;
4484 }
4485 break;
4486 }
4488 request = REQ_NONE;
4489 break;
4490 }
4491 case REQ_SEARCH:
4492 case REQ_SEARCH_BACK:
4493 {
4494 const char *prompt = request == REQ_SEARCH
4495 ? "/" : "?";
4496 char *search = read_prompt(prompt);
4498 if (search)
4499 string_ncopy(opt_search, search, strlen(search));
4500 else
4501 request = REQ_NONE;
4502 break;
4503 }
4504 case REQ_SCREEN_RESIZE:
4505 {
4506 int height, width;
4508 getmaxyx(stdscr, height, width);
4510 /* Resize the status view and let the view driver take
4511 * care of resizing the displayed views. */
4512 wresize(status_win, 1, width);
4513 mvwin(status_win, height - 1, 0);
4514 wrefresh(status_win);
4515 break;
4516 }
4517 default:
4518 break;
4519 }
4520 }
4522 quit(0);
4524 return 0;
4525 }