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