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0360e173457a455d4d266b46ee338ac19e4fefba
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);
72 #define ABS(x) ((x) >= 0 ? (x) : -(x))
73 #define MIN(x, y) ((x) < (y) ? (x) : (y))
75 #define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
76 #define STRING_SIZE(x) (sizeof(x) - 1)
78 #define SIZEOF_STR 1024 /* Default string size. */
79 #define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
80 #define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
82 /* Revision graph */
84 #define REVGRAPH_INIT 'I'
85 #define REVGRAPH_MERGE 'M'
86 #define REVGRAPH_BRANCH '+'
87 #define REVGRAPH_COMMIT '*'
88 #define REVGRAPH_BOUND '^'
90 #define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
92 /* This color name can be used to refer to the default term colors. */
93 #define COLOR_DEFAULT (-1)
95 #define ICONV_NONE ((iconv_t) -1)
96 #ifndef ICONV_CONST
97 #define ICONV_CONST /* nothing */
98 #endif
100 /* The format and size of the date column in the main view. */
101 #define DATE_FORMAT "%Y-%m-%d %H:%M"
102 #define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
104 #define AUTHOR_COLS 20
105 #define ID_COLS 8
107 /* The default interval between line numbers. */
108 #define NUMBER_INTERVAL 5
110 #define TAB_SIZE 8
112 #define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
114 #define NULL_ID "0000000000000000000000000000000000000000"
116 #ifndef GIT_CONFIG
117 #define GIT_CONFIG "git config"
118 #endif
120 #define TIG_LS_REMOTE \
121 "git ls-remote . 2>/dev/null"
123 #define TIG_DIFF_CMD \
124 "git show --pretty=fuller --no-color --root --patch-with-stat --find-copies-harder -C %s 2>/dev/null"
126 #define TIG_LOG_CMD \
127 "git log --no-color --cc --stat -n100 %s 2>/dev/null"
129 #define TIG_MAIN_BASE \
130 "git log --no-color --pretty=raw --parents --topo-order"
132 #define TIG_MAIN_CMD \
133 TIG_MAIN_BASE " %s 2>/dev/null"
135 #define TIG_TREE_CMD \
136 "git ls-tree %s %s"
138 #define TIG_BLOB_CMD \
139 "git cat-file blob %s"
141 /* XXX: Needs to be defined to the empty string. */
142 #define TIG_HELP_CMD ""
143 #define TIG_PAGER_CMD ""
144 #define TIG_STATUS_CMD ""
145 #define TIG_STAGE_CMD ""
146 #define TIG_BLAME_CMD ""
148 /* Some ascii-shorthands fitted into the ncurses namespace. */
149 #define KEY_TAB '\t'
150 #define KEY_RETURN '\r'
151 #define KEY_ESC 27
154 struct ref {
155 char *name; /* Ref name; tag or head names are shortened. */
156 char id[SIZEOF_REV]; /* Commit SHA1 ID */
157 unsigned int head:1; /* Is it the current HEAD? */
158 unsigned int tag:1; /* Is it a tag? */
159 unsigned int ltag:1; /* If so, is the tag local? */
160 unsigned int remote:1; /* Is it a remote ref? */
161 unsigned int tracked:1; /* Is it the remote for the current HEAD? */
162 unsigned int next:1; /* For ref lists: are there more refs? */
163 };
165 static struct ref **get_refs(char *id);
167 struct int_map {
168 const char *name;
169 int namelen;
170 int value;
171 };
173 static int
174 set_from_int_map(struct int_map *map, size_t map_size,
175 int *value, const char *name, int namelen)
176 {
178 int i;
180 for (i = 0; i < map_size; i++)
181 if (namelen == map[i].namelen &&
182 !strncasecmp(name, map[i].name, namelen)) {
183 *value = map[i].value;
184 return OK;
185 }
187 return ERR;
188 }
191 /*
192 * String helpers
193 */
195 static inline void
196 string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
197 {
198 if (srclen > dstlen - 1)
199 srclen = dstlen - 1;
201 strncpy(dst, src, srclen);
202 dst[srclen] = 0;
203 }
205 /* Shorthands for safely copying into a fixed buffer. */
207 #define string_copy(dst, src) \
208 string_ncopy_do(dst, sizeof(dst), src, sizeof(src))
210 #define string_ncopy(dst, src, srclen) \
211 string_ncopy_do(dst, sizeof(dst), src, srclen)
213 #define string_copy_rev(dst, src) \
214 string_ncopy_do(dst, SIZEOF_REV, src, SIZEOF_REV - 1)
216 #define string_add(dst, from, src) \
217 string_ncopy_do(dst + (from), sizeof(dst) - (from), src, sizeof(src))
219 static char *
220 chomp_string(char *name)
221 {
222 int namelen;
224 while (isspace(*name))
225 name++;
227 namelen = strlen(name) - 1;
228 while (namelen > 0 && isspace(name[namelen]))
229 name[namelen--] = 0;
231 return name;
232 }
234 static bool
235 string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
236 {
237 va_list args;
238 size_t pos = bufpos ? *bufpos : 0;
240 va_start(args, fmt);
241 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
242 va_end(args);
244 if (bufpos)
245 *bufpos = pos;
247 return pos >= bufsize ? FALSE : TRUE;
248 }
250 #define string_format(buf, fmt, args...) \
251 string_nformat(buf, sizeof(buf), NULL, fmt, args)
253 #define string_format_from(buf, from, fmt, args...) \
254 string_nformat(buf, sizeof(buf), from, fmt, args)
256 static int
257 string_enum_compare(const char *str1, const char *str2, int len)
258 {
259 size_t i;
261 #define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
263 /* Diff-Header == DIFF_HEADER */
264 for (i = 0; i < len; i++) {
265 if (toupper(str1[i]) == toupper(str2[i]))
266 continue;
268 if (string_enum_sep(str1[i]) &&
269 string_enum_sep(str2[i]))
270 continue;
272 return str1[i] - str2[i];
273 }
275 return 0;
276 }
278 /* Shell quoting
279 *
280 * NOTE: The following is a slightly modified copy of the git project's shell
281 * quoting routines found in the quote.c file.
282 *
283 * Help to copy the thing properly quoted for the shell safety. any single
284 * quote is replaced with '\'', any exclamation point is replaced with '\!',
285 * and the whole thing is enclosed in a
286 *
287 * E.g.
288 * original sq_quote result
289 * name ==> name ==> 'name'
290 * a b ==> a b ==> 'a b'
291 * a'b ==> a'\''b ==> 'a'\''b'
292 * a!b ==> a'\!'b ==> 'a'\!'b'
293 */
295 static size_t
296 sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
297 {
298 char c;
300 #define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
302 BUFPUT('\'');
303 while ((c = *src++)) {
304 if (c == '\'' || c == '!') {
305 BUFPUT('\'');
306 BUFPUT('\\');
307 BUFPUT(c);
308 BUFPUT('\'');
309 } else {
310 BUFPUT(c);
311 }
312 }
313 BUFPUT('\'');
315 if (bufsize < SIZEOF_STR)
316 buf[bufsize] = 0;
318 return bufsize;
319 }
322 /*
323 * User requests
324 */
326 #define REQ_INFO \
327 /* XXX: Keep the view request first and in sync with views[]. */ \
328 REQ_GROUP("View switching") \
329 REQ_(VIEW_MAIN, "Show main view"), \
330 REQ_(VIEW_DIFF, "Show diff view"), \
331 REQ_(VIEW_LOG, "Show log view"), \
332 REQ_(VIEW_TREE, "Show tree view"), \
333 REQ_(VIEW_BLOB, "Show blob view"), \
334 REQ_(VIEW_BLAME, "Show blame view"), \
335 REQ_(VIEW_HELP, "Show help page"), \
336 REQ_(VIEW_PAGER, "Show pager view"), \
337 REQ_(VIEW_STATUS, "Show status view"), \
338 REQ_(VIEW_STAGE, "Show stage view"), \
339 \
340 REQ_GROUP("View manipulation") \
341 REQ_(ENTER, "Enter current line and scroll"), \
342 REQ_(NEXT, "Move to next"), \
343 REQ_(PREVIOUS, "Move to previous"), \
344 REQ_(VIEW_NEXT, "Move focus to next view"), \
345 REQ_(REFRESH, "Reload and refresh"), \
346 REQ_(MAXIMIZE, "Maximize the current view"), \
347 REQ_(VIEW_CLOSE, "Close the current view"), \
348 REQ_(QUIT, "Close all views and quit"), \
349 \
350 REQ_GROUP("Cursor navigation") \
351 REQ_(MOVE_UP, "Move cursor one line up"), \
352 REQ_(MOVE_DOWN, "Move cursor one line down"), \
353 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
354 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
355 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
356 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
357 \
358 REQ_GROUP("Scrolling") \
359 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
360 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
361 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
362 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
363 \
364 REQ_GROUP("Searching") \
365 REQ_(SEARCH, "Search the view"), \
366 REQ_(SEARCH_BACK, "Search backwards in the view"), \
367 REQ_(FIND_NEXT, "Find next search match"), \
368 REQ_(FIND_PREV, "Find previous search match"), \
369 \
370 REQ_GROUP("Misc") \
371 REQ_(PROMPT, "Bring up the prompt"), \
372 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
373 REQ_(SCREEN_RESIZE, "Resize the screen"), \
374 REQ_(SHOW_VERSION, "Show version information"), \
375 REQ_(STOP_LOADING, "Stop all loading views"), \
376 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
377 REQ_(TOGGLE_DATE, "Toggle date display"), \
378 REQ_(TOGGLE_AUTHOR, "Toggle author display"), \
379 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization"), \
380 REQ_(TOGGLE_REFS, "Toggle reference display (tags/branches)"), \
381 REQ_(STATUS_UPDATE, "Update file status"), \
382 REQ_(STATUS_CHECKOUT, "Checkout file"), \
383 REQ_(STATUS_MERGE, "Merge file using external tool"), \
384 REQ_(STAGE_NEXT, "Find next chunk to stage"), \
385 REQ_(TREE_PARENT, "Switch to parent directory in tree view"), \
386 REQ_(EDIT, "Open in editor"), \
387 REQ_(NONE, "Do nothing")
390 /* User action requests. */
391 enum request {
392 #define REQ_GROUP(help)
393 #define REQ_(req, help) REQ_##req
395 /* Offset all requests to avoid conflicts with ncurses getch values. */
396 REQ_OFFSET = KEY_MAX + 1,
397 REQ_INFO
399 #undef REQ_GROUP
400 #undef REQ_
401 };
403 struct request_info {
404 enum request request;
405 char *name;
406 int namelen;
407 char *help;
408 };
410 static struct request_info req_info[] = {
411 #define REQ_GROUP(help) { 0, NULL, 0, (help) },
412 #define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
413 REQ_INFO
414 #undef REQ_GROUP
415 #undef REQ_
416 };
418 static enum request
419 get_request(const char *name)
420 {
421 int namelen = strlen(name);
422 int i;
424 for (i = 0; i < ARRAY_SIZE(req_info); i++)
425 if (req_info[i].namelen == namelen &&
426 !string_enum_compare(req_info[i].name, name, namelen))
427 return req_info[i].request;
429 return REQ_NONE;
430 }
433 /*
434 * Options
435 */
437 static const char usage[] =
438 "tig " TIG_VERSION " (" __DATE__ ")\n"
439 "\n"
440 "Usage: tig [options] [revs] [--] [paths]\n"
441 " or: tig show [options] [revs] [--] [paths]\n"
442 " or: tig blame [rev] path\n"
443 " or: tig status\n"
444 " or: tig < [git command output]\n"
445 "\n"
446 "Options:\n"
447 " -v, --version Show version and exit\n"
448 " -h, --help Show help message and exit";
450 /* Option and state variables. */
451 static bool opt_date = TRUE;
452 static bool opt_author = TRUE;
453 static bool opt_line_number = FALSE;
454 static bool opt_line_graphics = TRUE;
455 static bool opt_rev_graph = FALSE;
456 static bool opt_show_refs = TRUE;
457 static int opt_num_interval = NUMBER_INTERVAL;
458 static int opt_tab_size = TAB_SIZE;
459 static int opt_author_cols = AUTHOR_COLS-1;
460 static char opt_cmd[SIZEOF_STR] = "";
461 static char opt_path[SIZEOF_STR] = "";
462 static char opt_file[SIZEOF_STR] = "";
463 static char opt_ref[SIZEOF_REF] = "";
464 static char opt_head[SIZEOF_REF] = "";
465 static char opt_remote[SIZEOF_REF] = "";
466 static bool opt_no_head = TRUE;
467 static FILE *opt_pipe = NULL;
468 static char opt_encoding[20] = "UTF-8";
469 static bool opt_utf8 = TRUE;
470 static char opt_codeset[20] = "UTF-8";
471 static iconv_t opt_iconv = ICONV_NONE;
472 static char opt_search[SIZEOF_STR] = "";
473 static char opt_cdup[SIZEOF_STR] = "";
474 static char opt_git_dir[SIZEOF_STR] = "";
475 static signed char opt_is_inside_work_tree = -1; /* set to TRUE or FALSE */
476 static char opt_editor[SIZEOF_STR] = "";
478 static enum request
479 parse_options(int argc, char *argv[])
480 {
481 enum request request = REQ_VIEW_MAIN;
482 size_t buf_size;
483 char *subcommand;
484 bool seen_dashdash = FALSE;
485 int i;
487 if (!isatty(STDIN_FILENO)) {
488 opt_pipe = stdin;
489 return REQ_VIEW_PAGER;
490 }
492 if (argc <= 1)
493 return REQ_VIEW_MAIN;
495 subcommand = argv[1];
496 if (!strcmp(subcommand, "status") || !strcmp(subcommand, "-S")) {
497 if (!strcmp(subcommand, "-S"))
498 warn("`-S' has been deprecated; use `tig status' instead");
499 if (argc > 2)
500 warn("ignoring arguments after `%s'", subcommand);
501 return REQ_VIEW_STATUS;
503 } else if (!strcmp(subcommand, "blame")) {
504 if (argc <= 2 || argc > 4)
505 die("invalid number of options to blame\n\n%s", usage);
507 i = 2;
508 if (argc == 4) {
509 string_ncopy(opt_ref, argv[i], strlen(argv[i]));
510 i++;
511 }
513 string_ncopy(opt_file, argv[i], strlen(argv[i]));
514 return REQ_VIEW_BLAME;
516 } else if (!strcmp(subcommand, "show")) {
517 request = REQ_VIEW_DIFF;
519 } else if (!strcmp(subcommand, "log") || !strcmp(subcommand, "diff")) {
520 request = subcommand[0] == 'l' ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
521 warn("`tig %s' has been deprecated", subcommand);
523 } else {
524 subcommand = NULL;
525 }
527 if (!subcommand)
528 /* XXX: This is vulnerable to the user overriding
529 * options required for the main view parser. */
530 string_copy(opt_cmd, TIG_MAIN_BASE);
531 else
532 string_format(opt_cmd, "git %s", subcommand);
534 buf_size = strlen(opt_cmd);
536 for (i = 1 + !!subcommand; i < argc; i++) {
537 char *opt = argv[i];
539 if (seen_dashdash || !strcmp(opt, "--")) {
540 seen_dashdash = TRUE;
542 } else if (!strcmp(opt, "-v") || !strcmp(opt, "--version")) {
543 printf("tig version %s\n", TIG_VERSION);
544 return REQ_NONE;
546 } else if (!strcmp(opt, "-h") || !strcmp(opt, "--help")) {
547 printf("%s\n", usage);
548 return REQ_NONE;
549 }
551 opt_cmd[buf_size++] = ' ';
552 buf_size = sq_quote(opt_cmd, buf_size, opt);
553 if (buf_size >= sizeof(opt_cmd))
554 die("command too long");
555 }
557 opt_cmd[buf_size] = 0;
559 return request;
560 }
563 /*
564 * Line-oriented content detection.
565 */
567 #define LINE_INFO \
568 LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
569 LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
570 LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
571 LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
572 LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
573 LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
574 LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
575 LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
576 LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
577 LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
578 LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
579 LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
580 LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
581 LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
582 LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
583 LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
584 LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
585 LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
586 LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
587 LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
588 LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
589 LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
590 LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
591 LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
592 LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
593 LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
594 LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
595 LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
596 LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
597 LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
598 LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
599 LINE(DELIMITER, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
600 LINE(DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
601 LINE(LINE_NUMBER, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
602 LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
603 LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
604 LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
605 LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
606 LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
607 LINE(MAIN_LOCAL_TAG,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
608 LINE(MAIN_REMOTE, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
609 LINE(MAIN_TRACKED, "", COLOR_YELLOW, COLOR_DEFAULT, A_BOLD), \
610 LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
611 LINE(MAIN_HEAD, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
612 LINE(MAIN_REVGRAPH,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
613 LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
614 LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
615 LINE(STAT_HEAD, "", COLOR_YELLOW, COLOR_DEFAULT, 0), \
616 LINE(STAT_SECTION, "", COLOR_CYAN, COLOR_DEFAULT, 0), \
617 LINE(STAT_NONE, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
618 LINE(STAT_STAGED, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
619 LINE(STAT_UNSTAGED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
620 LINE(STAT_UNTRACKED,"", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
621 LINE(BLAME_ID, "", COLOR_MAGENTA, COLOR_DEFAULT, 0)
623 enum line_type {
624 #define LINE(type, line, fg, bg, attr) \
625 LINE_##type
626 LINE_INFO,
627 LINE_NONE
628 #undef LINE
629 };
631 struct line_info {
632 const char *name; /* Option name. */
633 int namelen; /* Size of option name. */
634 const char *line; /* The start of line to match. */
635 int linelen; /* Size of string to match. */
636 int fg, bg, attr; /* Color and text attributes for the lines. */
637 };
639 static struct line_info line_info[] = {
640 #define LINE(type, line, fg, bg, attr) \
641 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
642 LINE_INFO
643 #undef LINE
644 };
646 static enum line_type
647 get_line_type(char *line)
648 {
649 int linelen = strlen(line);
650 enum line_type type;
652 for (type = 0; type < ARRAY_SIZE(line_info); type++)
653 /* Case insensitive search matches Signed-off-by lines better. */
654 if (linelen >= line_info[type].linelen &&
655 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
656 return type;
658 return LINE_DEFAULT;
659 }
661 static inline int
662 get_line_attr(enum line_type type)
663 {
664 assert(type < ARRAY_SIZE(line_info));
665 return COLOR_PAIR(type) | line_info[type].attr;
666 }
668 static struct line_info *
669 get_line_info(char *name)
670 {
671 size_t namelen = strlen(name);
672 enum line_type type;
674 for (type = 0; type < ARRAY_SIZE(line_info); type++)
675 if (namelen == line_info[type].namelen &&
676 !string_enum_compare(line_info[type].name, name, namelen))
677 return &line_info[type];
679 return NULL;
680 }
682 static void
683 init_colors(void)
684 {
685 int default_bg = line_info[LINE_DEFAULT].bg;
686 int default_fg = line_info[LINE_DEFAULT].fg;
687 enum line_type type;
689 start_color();
691 if (assume_default_colors(default_fg, default_bg) == ERR) {
692 default_bg = COLOR_BLACK;
693 default_fg = COLOR_WHITE;
694 }
696 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
697 struct line_info *info = &line_info[type];
698 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
699 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
701 init_pair(type, fg, bg);
702 }
703 }
705 struct line {
706 enum line_type type;
708 /* State flags */
709 unsigned int selected:1;
710 unsigned int dirty:1;
712 void *data; /* User data */
713 };
716 /*
717 * Keys
718 */
720 struct keybinding {
721 int alias;
722 enum request request;
723 struct keybinding *next;
724 };
726 static struct keybinding default_keybindings[] = {
727 /* View switching */
728 { 'm', REQ_VIEW_MAIN },
729 { 'd', REQ_VIEW_DIFF },
730 { 'l', REQ_VIEW_LOG },
731 { 't', REQ_VIEW_TREE },
732 { 'f', REQ_VIEW_BLOB },
733 { 'B', REQ_VIEW_BLAME },
734 { 'p', REQ_VIEW_PAGER },
735 { 'h', REQ_VIEW_HELP },
736 { 'S', REQ_VIEW_STATUS },
737 { 'c', REQ_VIEW_STAGE },
739 /* View manipulation */
740 { 'q', REQ_VIEW_CLOSE },
741 { KEY_TAB, REQ_VIEW_NEXT },
742 { KEY_RETURN, REQ_ENTER },
743 { KEY_UP, REQ_PREVIOUS },
744 { KEY_DOWN, REQ_NEXT },
745 { 'R', REQ_REFRESH },
746 { KEY_F(5), REQ_REFRESH },
747 { 'O', REQ_MAXIMIZE },
749 /* Cursor navigation */
750 { 'k', REQ_MOVE_UP },
751 { 'j', REQ_MOVE_DOWN },
752 { KEY_HOME, REQ_MOVE_FIRST_LINE },
753 { KEY_END, REQ_MOVE_LAST_LINE },
754 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
755 { ' ', REQ_MOVE_PAGE_DOWN },
756 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
757 { 'b', REQ_MOVE_PAGE_UP },
758 { '-', REQ_MOVE_PAGE_UP },
760 /* Scrolling */
761 { KEY_IC, REQ_SCROLL_LINE_UP },
762 { KEY_DC, REQ_SCROLL_LINE_DOWN },
763 { 'w', REQ_SCROLL_PAGE_UP },
764 { 's', REQ_SCROLL_PAGE_DOWN },
766 /* Searching */
767 { '/', REQ_SEARCH },
768 { '?', REQ_SEARCH_BACK },
769 { 'n', REQ_FIND_NEXT },
770 { 'N', REQ_FIND_PREV },
772 /* Misc */
773 { 'Q', REQ_QUIT },
774 { 'z', REQ_STOP_LOADING },
775 { 'v', REQ_SHOW_VERSION },
776 { 'r', REQ_SCREEN_REDRAW },
777 { '.', REQ_TOGGLE_LINENO },
778 { 'D', REQ_TOGGLE_DATE },
779 { 'A', REQ_TOGGLE_AUTHOR },
780 { 'g', REQ_TOGGLE_REV_GRAPH },
781 { 'F', REQ_TOGGLE_REFS },
782 { ':', REQ_PROMPT },
783 { 'u', REQ_STATUS_UPDATE },
784 { '!', REQ_STATUS_CHECKOUT },
785 { 'M', REQ_STATUS_MERGE },
786 { '@', REQ_STAGE_NEXT },
787 { ',', REQ_TREE_PARENT },
788 { 'e', REQ_EDIT },
790 /* Using the ncurses SIGWINCH handler. */
791 { KEY_RESIZE, REQ_SCREEN_RESIZE },
792 };
794 #define KEYMAP_INFO \
795 KEYMAP_(GENERIC), \
796 KEYMAP_(MAIN), \
797 KEYMAP_(DIFF), \
798 KEYMAP_(LOG), \
799 KEYMAP_(TREE), \
800 KEYMAP_(BLOB), \
801 KEYMAP_(BLAME), \
802 KEYMAP_(PAGER), \
803 KEYMAP_(HELP), \
804 KEYMAP_(STATUS), \
805 KEYMAP_(STAGE)
807 enum keymap {
808 #define KEYMAP_(name) KEYMAP_##name
809 KEYMAP_INFO
810 #undef KEYMAP_
811 };
813 static struct int_map keymap_table[] = {
814 #define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
815 KEYMAP_INFO
816 #undef KEYMAP_
817 };
819 #define set_keymap(map, name) \
820 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
822 static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
824 static void
825 add_keybinding(enum keymap keymap, enum request request, int key)
826 {
827 struct keybinding *keybinding;
829 keybinding = calloc(1, sizeof(*keybinding));
830 if (!keybinding)
831 die("Failed to allocate keybinding");
833 keybinding->alias = key;
834 keybinding->request = request;
835 keybinding->next = keybindings[keymap];
836 keybindings[keymap] = keybinding;
837 }
839 /* Looks for a key binding first in the given map, then in the generic map, and
840 * lastly in the default keybindings. */
841 static enum request
842 get_keybinding(enum keymap keymap, int key)
843 {
844 struct keybinding *kbd;
845 int i;
847 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
848 if (kbd->alias == key)
849 return kbd->request;
851 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
852 if (kbd->alias == key)
853 return kbd->request;
855 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
856 if (default_keybindings[i].alias == key)
857 return default_keybindings[i].request;
859 return (enum request) key;
860 }
863 struct key {
864 char *name;
865 int value;
866 };
868 static struct key key_table[] = {
869 { "Enter", KEY_RETURN },
870 { "Space", ' ' },
871 { "Backspace", KEY_BACKSPACE },
872 { "Tab", KEY_TAB },
873 { "Escape", KEY_ESC },
874 { "Left", KEY_LEFT },
875 { "Right", KEY_RIGHT },
876 { "Up", KEY_UP },
877 { "Down", KEY_DOWN },
878 { "Insert", KEY_IC },
879 { "Delete", KEY_DC },
880 { "Hash", '#' },
881 { "Home", KEY_HOME },
882 { "End", KEY_END },
883 { "PageUp", KEY_PPAGE },
884 { "PageDown", KEY_NPAGE },
885 { "F1", KEY_F(1) },
886 { "F2", KEY_F(2) },
887 { "F3", KEY_F(3) },
888 { "F4", KEY_F(4) },
889 { "F5", KEY_F(5) },
890 { "F6", KEY_F(6) },
891 { "F7", KEY_F(7) },
892 { "F8", KEY_F(8) },
893 { "F9", KEY_F(9) },
894 { "F10", KEY_F(10) },
895 { "F11", KEY_F(11) },
896 { "F12", KEY_F(12) },
897 };
899 static int
900 get_key_value(const char *name)
901 {
902 int i;
904 for (i = 0; i < ARRAY_SIZE(key_table); i++)
905 if (!strcasecmp(key_table[i].name, name))
906 return key_table[i].value;
908 if (strlen(name) == 1 && isprint(*name))
909 return (int) *name;
911 return ERR;
912 }
914 static char *
915 get_key_name(int key_value)
916 {
917 static char key_char[] = "'X'";
918 char *seq = NULL;
919 int key;
921 for (key = 0; key < ARRAY_SIZE(key_table); key++)
922 if (key_table[key].value == key_value)
923 seq = key_table[key].name;
925 if (seq == NULL &&
926 key_value < 127 &&
927 isprint(key_value)) {
928 key_char[1] = (char) key_value;
929 seq = key_char;
930 }
932 return seq ? seq : "'?'";
933 }
935 static char *
936 get_key(enum request request)
937 {
938 static char buf[BUFSIZ];
939 size_t pos = 0;
940 char *sep = "";
941 int i;
943 buf[pos] = 0;
945 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
946 struct keybinding *keybinding = &default_keybindings[i];
948 if (keybinding->request != request)
949 continue;
951 if (!string_format_from(buf, &pos, "%s%s", sep,
952 get_key_name(keybinding->alias)))
953 return "Too many keybindings!";
954 sep = ", ";
955 }
957 return buf;
958 }
960 struct run_request {
961 enum keymap keymap;
962 int key;
963 char cmd[SIZEOF_STR];
964 };
966 static struct run_request *run_request;
967 static size_t run_requests;
969 static enum request
970 add_run_request(enum keymap keymap, int key, int argc, char **argv)
971 {
972 struct run_request *req;
973 char cmd[SIZEOF_STR];
974 size_t bufpos;
976 for (bufpos = 0; argc > 0; argc--, argv++)
977 if (!string_format_from(cmd, &bufpos, "%s ", *argv))
978 return REQ_NONE;
980 req = realloc(run_request, (run_requests + 1) * sizeof(*run_request));
981 if (!req)
982 return REQ_NONE;
984 run_request = req;
985 req = &run_request[run_requests++];
986 string_copy(req->cmd, cmd);
987 req->keymap = keymap;
988 req->key = key;
990 return REQ_NONE + run_requests;
991 }
993 static struct run_request *
994 get_run_request(enum request request)
995 {
996 if (request <= REQ_NONE)
997 return NULL;
998 return &run_request[request - REQ_NONE - 1];
999 }
1001 static void
1002 add_builtin_run_requests(void)
1003 {
1004 struct {
1005 enum keymap keymap;
1006 int key;
1007 char *argv[1];
1008 } reqs[] = {
1009 { KEYMAP_MAIN, 'C', { "git cherry-pick %(commit)" } },
1010 { KEYMAP_GENERIC, 'G', { "git gc" } },
1011 };
1012 int i;
1014 for (i = 0; i < ARRAY_SIZE(reqs); i++) {
1015 enum request req;
1017 req = add_run_request(reqs[i].keymap, reqs[i].key, 1, reqs[i].argv);
1018 if (req != REQ_NONE)
1019 add_keybinding(reqs[i].keymap, req, reqs[i].key);
1020 }
1021 }
1023 /*
1024 * User config file handling.
1025 */
1027 static struct int_map color_map[] = {
1028 #define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
1029 COLOR_MAP(DEFAULT),
1030 COLOR_MAP(BLACK),
1031 COLOR_MAP(BLUE),
1032 COLOR_MAP(CYAN),
1033 COLOR_MAP(GREEN),
1034 COLOR_MAP(MAGENTA),
1035 COLOR_MAP(RED),
1036 COLOR_MAP(WHITE),
1037 COLOR_MAP(YELLOW),
1038 };
1040 #define set_color(color, name) \
1041 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
1043 static struct int_map attr_map[] = {
1044 #define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
1045 ATTR_MAP(NORMAL),
1046 ATTR_MAP(BLINK),
1047 ATTR_MAP(BOLD),
1048 ATTR_MAP(DIM),
1049 ATTR_MAP(REVERSE),
1050 ATTR_MAP(STANDOUT),
1051 ATTR_MAP(UNDERLINE),
1052 };
1054 #define set_attribute(attr, name) \
1055 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
1057 static int config_lineno;
1058 static bool config_errors;
1059 static char *config_msg;
1061 /* Wants: object fgcolor bgcolor [attr] */
1062 static int
1063 option_color_command(int argc, char *argv[])
1064 {
1065 struct line_info *info;
1067 if (argc != 3 && argc != 4) {
1068 config_msg = "Wrong number of arguments given to color command";
1069 return ERR;
1070 }
1072 info = get_line_info(argv[0]);
1073 if (!info) {
1074 if (!string_enum_compare(argv[0], "main-delim", strlen("main-delim"))) {
1075 info = get_line_info("delimiter");
1077 } else if (!string_enum_compare(argv[0], "main-date", strlen("main-date"))) {
1078 info = get_line_info("date");
1080 } else {
1081 config_msg = "Unknown color name";
1082 return ERR;
1083 }
1084 }
1086 if (set_color(&info->fg, argv[1]) == ERR ||
1087 set_color(&info->bg, argv[2]) == ERR) {
1088 config_msg = "Unknown color";
1089 return ERR;
1090 }
1092 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
1093 config_msg = "Unknown attribute";
1094 return ERR;
1095 }
1097 return OK;
1098 }
1100 static bool parse_bool(const char *s)
1101 {
1102 return (!strcmp(s, "1") || !strcmp(s, "true") ||
1103 !strcmp(s, "yes")) ? TRUE : FALSE;
1104 }
1106 static int
1107 parse_int(const char *s, int default_value, int min, int max)
1108 {
1109 int value = atoi(s);
1111 return (value < min || value > max) ? default_value : value;
1112 }
1114 /* Wants: name = value */
1115 static int
1116 option_set_command(int argc, char *argv[])
1117 {
1118 if (argc != 3) {
1119 config_msg = "Wrong number of arguments given to set command";
1120 return ERR;
1121 }
1123 if (strcmp(argv[1], "=")) {
1124 config_msg = "No value assigned";
1125 return ERR;
1126 }
1128 if (!strcmp(argv[0], "show-author")) {
1129 opt_author = parse_bool(argv[2]);
1130 return OK;
1131 }
1133 if (!strcmp(argv[0], "show-date")) {
1134 opt_date = parse_bool(argv[2]);
1135 return OK;
1136 }
1138 if (!strcmp(argv[0], "show-rev-graph")) {
1139 opt_rev_graph = parse_bool(argv[2]);
1140 return OK;
1141 }
1143 if (!strcmp(argv[0], "show-refs")) {
1144 opt_show_refs = parse_bool(argv[2]);
1145 return OK;
1146 }
1148 if (!strcmp(argv[0], "show-line-numbers")) {
1149 opt_line_number = parse_bool(argv[2]);
1150 return OK;
1151 }
1153 if (!strcmp(argv[0], "line-graphics")) {
1154 opt_line_graphics = parse_bool(argv[2]);
1155 return OK;
1156 }
1158 if (!strcmp(argv[0], "line-number-interval")) {
1159 opt_num_interval = parse_int(argv[2], opt_num_interval, 1, 1024);
1160 return OK;
1161 }
1163 if (!strcmp(argv[0], "author-width")) {
1164 opt_author_cols = parse_int(argv[2], opt_author_cols, 0, 1024);
1165 return OK;
1166 }
1168 if (!strcmp(argv[0], "tab-size")) {
1169 opt_tab_size = parse_int(argv[2], opt_tab_size, 1, 1024);
1170 return OK;
1171 }
1173 if (!strcmp(argv[0], "commit-encoding")) {
1174 char *arg = argv[2];
1175 int delimiter = *arg;
1176 int i;
1178 switch (delimiter) {
1179 case '"':
1180 case '\'':
1181 for (arg++, i = 0; arg[i]; i++)
1182 if (arg[i] == delimiter) {
1183 arg[i] = 0;
1184 break;
1185 }
1186 default:
1187 string_ncopy(opt_encoding, arg, strlen(arg));
1188 return OK;
1189 }
1190 }
1192 config_msg = "Unknown variable name";
1193 return ERR;
1194 }
1196 /* Wants: mode request key */
1197 static int
1198 option_bind_command(int argc, char *argv[])
1199 {
1200 enum request request;
1201 int keymap;
1202 int key;
1204 if (argc < 3) {
1205 config_msg = "Wrong number of arguments given to bind command";
1206 return ERR;
1207 }
1209 if (set_keymap(&keymap, argv[0]) == ERR) {
1210 config_msg = "Unknown key map";
1211 return ERR;
1212 }
1214 key = get_key_value(argv[1]);
1215 if (key == ERR) {
1216 config_msg = "Unknown key";
1217 return ERR;
1218 }
1220 request = get_request(argv[2]);
1221 if (request == REQ_NONE) {
1222 const char *obsolete[] = { "cherry-pick" };
1223 size_t namelen = strlen(argv[2]);
1224 int i;
1226 for (i = 0; i < ARRAY_SIZE(obsolete); i++) {
1227 if (namelen == strlen(obsolete[i]) &&
1228 !string_enum_compare(obsolete[i], argv[2], namelen)) {
1229 config_msg = "Obsolete request name";
1230 return ERR;
1231 }
1232 }
1233 }
1234 if (request == REQ_NONE && *argv[2]++ == '!')
1235 request = add_run_request(keymap, key, argc - 2, argv + 2);
1236 if (request == REQ_NONE) {
1237 config_msg = "Unknown request name";
1238 return ERR;
1239 }
1241 add_keybinding(keymap, request, key);
1243 return OK;
1244 }
1246 static int
1247 set_option(char *opt, char *value)
1248 {
1249 char *argv[16];
1250 int valuelen;
1251 int argc = 0;
1253 /* Tokenize */
1254 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1255 argv[argc++] = value;
1256 value += valuelen;
1258 /* Nothing more to tokenize or last available token. */
1259 if (!*value || argc >= ARRAY_SIZE(argv))
1260 break;
1262 *value++ = 0;
1263 while (isspace(*value))
1264 value++;
1265 }
1267 if (!strcmp(opt, "color"))
1268 return option_color_command(argc, argv);
1270 if (!strcmp(opt, "set"))
1271 return option_set_command(argc, argv);
1273 if (!strcmp(opt, "bind"))
1274 return option_bind_command(argc, argv);
1276 config_msg = "Unknown option command";
1277 return ERR;
1278 }
1280 static int
1281 read_option(char *opt, size_t optlen, char *value, size_t valuelen)
1282 {
1283 int status = OK;
1285 config_lineno++;
1286 config_msg = "Internal error";
1288 /* Check for comment markers, since read_properties() will
1289 * only ensure opt and value are split at first " \t". */
1290 optlen = strcspn(opt, "#");
1291 if (optlen == 0)
1292 return OK;
1294 if (opt[optlen] != 0) {
1295 config_msg = "No option value";
1296 status = ERR;
1298 } else {
1299 /* Look for comment endings in the value. */
1300 size_t len = strcspn(value, "#");
1302 if (len < valuelen) {
1303 valuelen = len;
1304 value[valuelen] = 0;
1305 }
1307 status = set_option(opt, value);
1308 }
1310 if (status == ERR) {
1311 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
1312 config_lineno, (int) optlen, opt, config_msg);
1313 config_errors = TRUE;
1314 }
1316 /* Always keep going if errors are encountered. */
1317 return OK;
1318 }
1320 static void
1321 load_option_file(const char *path)
1322 {
1323 FILE *file;
1325 /* It's ok that the file doesn't exist. */
1326 file = fopen(path, "r");
1327 if (!file)
1328 return;
1330 config_lineno = 0;
1331 config_errors = FALSE;
1333 if (read_properties(file, " \t", read_option) == ERR ||
1334 config_errors == TRUE)
1335 fprintf(stderr, "Errors while loading %s.\n", path);
1336 }
1338 static int
1339 load_options(void)
1340 {
1341 char *home = getenv("HOME");
1342 char *tigrc_user = getenv("TIGRC_USER");
1343 char *tigrc_system = getenv("TIGRC_SYSTEM");
1344 char buf[SIZEOF_STR];
1346 add_builtin_run_requests();
1348 if (!tigrc_system) {
1349 if (!string_format(buf, "%s/tigrc", SYSCONFDIR))
1350 return ERR;
1351 tigrc_system = buf;
1352 }
1353 load_option_file(tigrc_system);
1355 if (!tigrc_user) {
1356 if (!home || !string_format(buf, "%s/.tigrc", home))
1357 return ERR;
1358 tigrc_user = buf;
1359 }
1360 load_option_file(tigrc_user);
1362 return OK;
1363 }
1366 /*
1367 * The viewer
1368 */
1370 struct view;
1371 struct view_ops;
1373 /* The display array of active views and the index of the current view. */
1374 static struct view *display[2];
1375 static unsigned int current_view;
1377 /* Reading from the prompt? */
1378 static bool input_mode = FALSE;
1380 #define foreach_displayed_view(view, i) \
1381 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1383 #define displayed_views() (display[1] != NULL ? 2 : 1)
1385 /* Current head and commit ID */
1386 static char ref_blob[SIZEOF_REF] = "";
1387 static char ref_commit[SIZEOF_REF] = "HEAD";
1388 static char ref_head[SIZEOF_REF] = "HEAD";
1390 struct view {
1391 const char *name; /* View name */
1392 const char *cmd_fmt; /* Default command line format */
1393 const char *cmd_env; /* Command line set via environment */
1394 const char *id; /* Points to either of ref_{head,commit,blob} */
1396 struct view_ops *ops; /* View operations */
1398 enum keymap keymap; /* What keymap does this view have */
1399 bool git_dir; /* Whether the view requires a git directory. */
1401 char cmd[SIZEOF_STR]; /* Command buffer */
1402 char ref[SIZEOF_REF]; /* Hovered commit reference */
1403 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
1405 int height, width; /* The width and height of the main window */
1406 WINDOW *win; /* The main window */
1407 WINDOW *title; /* The title window living below the main window */
1409 /* Navigation */
1410 unsigned long offset; /* Offset of the window top */
1411 unsigned long lineno; /* Current line number */
1413 /* Searching */
1414 char grep[SIZEOF_STR]; /* Search string */
1415 regex_t *regex; /* Pre-compiled regex */
1417 /* If non-NULL, points to the view that opened this view. If this view
1418 * is closed tig will switch back to the parent view. */
1419 struct view *parent;
1421 /* Buffering */
1422 size_t lines; /* Total number of lines */
1423 struct line *line; /* Line index */
1424 size_t line_alloc; /* Total number of allocated lines */
1425 size_t line_size; /* Total number of used lines */
1426 unsigned int digits; /* Number of digits in the lines member. */
1428 /* Drawing */
1429 struct line *curline; /* Line currently being drawn. */
1430 enum line_type curtype; /* Attribute currently used for drawing. */
1431 unsigned long col; /* Column when drawing. */
1433 /* Loading */
1434 FILE *pipe;
1435 time_t start_time;
1436 };
1438 struct view_ops {
1439 /* What type of content being displayed. Used in the title bar. */
1440 const char *type;
1441 /* Open and reads in all view content. */
1442 bool (*open)(struct view *view);
1443 /* Read one line; updates view->line. */
1444 bool (*read)(struct view *view, char *data);
1445 /* Draw one line; @lineno must be < view->height. */
1446 bool (*draw)(struct view *view, struct line *line, unsigned int lineno);
1447 /* Depending on view handle a special requests. */
1448 enum request (*request)(struct view *view, enum request request, struct line *line);
1449 /* Search for regex in a line. */
1450 bool (*grep)(struct view *view, struct line *line);
1451 /* Select line */
1452 void (*select)(struct view *view, struct line *line);
1453 };
1455 static struct view_ops pager_ops;
1456 static struct view_ops main_ops;
1457 static struct view_ops tree_ops;
1458 static struct view_ops blob_ops;
1459 static struct view_ops blame_ops;
1460 static struct view_ops help_ops;
1461 static struct view_ops status_ops;
1462 static struct view_ops stage_ops;
1464 #define VIEW_STR(name, cmd, env, ref, ops, map, git) \
1465 { name, cmd, #env, ref, ops, map, git }
1467 #define VIEW_(id, name, ops, git, ref) \
1468 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id, git)
1471 static struct view views[] = {
1472 VIEW_(MAIN, "main", &main_ops, TRUE, ref_head),
1473 VIEW_(DIFF, "diff", &pager_ops, TRUE, ref_commit),
1474 VIEW_(LOG, "log", &pager_ops, TRUE, ref_head),
1475 VIEW_(TREE, "tree", &tree_ops, TRUE, ref_commit),
1476 VIEW_(BLOB, "blob", &blob_ops, TRUE, ref_blob),
1477 VIEW_(BLAME, "blame", &blame_ops, TRUE, ref_commit),
1478 VIEW_(HELP, "help", &help_ops, FALSE, ""),
1479 VIEW_(PAGER, "pager", &pager_ops, FALSE, "stdin"),
1480 VIEW_(STATUS, "status", &status_ops, TRUE, ""),
1481 VIEW_(STAGE, "stage", &stage_ops, TRUE, ""),
1482 };
1484 #define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1485 #define VIEW_REQ(view) ((view) - views + REQ_OFFSET + 1)
1487 #define foreach_view(view, i) \
1488 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1490 #define view_is_displayed(view) \
1491 (view == display[0] || view == display[1])
1494 enum line_graphic {
1495 LINE_GRAPHIC_VLINE
1496 };
1498 static int line_graphics[] = {
1499 /* LINE_GRAPHIC_VLINE: */ '|'
1500 };
1502 static inline void
1503 set_view_attr(struct view *view, enum line_type type)
1504 {
1505 if (!view->curline->selected && view->curtype != type) {
1506 wattrset(view->win, get_line_attr(type));
1507 wchgat(view->win, -1, 0, type, NULL);
1508 view->curtype = type;
1509 }
1510 }
1512 static int
1513 draw_chars(struct view *view, enum line_type type, const char *string,
1514 int max_len, bool use_tilde)
1515 {
1516 int len = 0;
1517 int col = 0;
1518 int trimmed = FALSE;
1520 if (max_len <= 0)
1521 return 0;
1523 if (opt_utf8) {
1524 len = utf8_length(string, &col, max_len, &trimmed, use_tilde);
1525 } else {
1526 col = len = strlen(string);
1527 if (len > max_len) {
1528 if (use_tilde) {
1529 max_len -= 1;
1530 }
1531 col = len = max_len;
1532 trimmed = TRUE;
1533 }
1534 }
1536 set_view_attr(view, type);
1537 waddnstr(view->win, string, len);
1538 if (trimmed && use_tilde) {
1539 set_view_attr(view, LINE_DELIMITER);
1540 waddch(view->win, '~');
1541 col++;
1542 }
1544 return col;
1545 }
1547 static int
1548 draw_space(struct view *view, enum line_type type, int max, int spaces)
1549 {
1550 static char space[] = " ";
1551 int col = 0;
1553 spaces = MIN(max, spaces);
1555 while (spaces > 0) {
1556 int len = MIN(spaces, sizeof(space) - 1);
1558 col += draw_chars(view, type, space, spaces, FALSE);
1559 spaces -= len;
1560 }
1562 return col;
1563 }
1565 static bool
1566 draw_lineno(struct view *view, unsigned int lineno)
1567 {
1568 char number[10];
1569 int digits3 = view->digits < 3 ? 3 : view->digits;
1570 int max_number = MIN(digits3, STRING_SIZE(number));
1571 int max = view->width - view->col;
1572 int col;
1574 if (max < max_number)
1575 max_number = max;
1577 lineno += view->offset + 1;
1578 if (lineno == 1 || (lineno % opt_num_interval) == 0) {
1579 static char fmt[] = "%1ld";
1581 if (view->digits <= 9)
1582 fmt[1] = '0' + digits3;
1584 if (!string_format(number, fmt, lineno))
1585 number[0] = 0;
1586 col = draw_chars(view, LINE_LINE_NUMBER, number, max_number, TRUE);
1587 } else {
1588 col = draw_space(view, LINE_LINE_NUMBER, max_number, max_number);
1589 }
1591 if (col < max) {
1592 set_view_attr(view, LINE_DEFAULT);
1593 waddch(view->win, line_graphics[LINE_GRAPHIC_VLINE]);
1594 col++;
1595 }
1597 if (col < max)
1598 col += draw_space(view, LINE_DEFAULT, max - col, 1);
1599 view->col += col;
1601 return view->width - view->col <= 0;
1602 }
1604 static bool
1605 draw_text(struct view *view, enum line_type type, const char *string, bool trim)
1606 {
1607 view->col += draw_chars(view, type, string, view->width - view->col, trim);
1608 return view->width - view->col <= 0;
1609 }
1611 static bool
1612 draw_graphic(struct view *view, enum line_type type, chtype graphic[], size_t size)
1613 {
1614 int max = view->width - view->col;
1615 int i;
1617 if (max < size)
1618 size = max;
1620 set_view_attr(view, type);
1621 /* Using waddch() instead of waddnstr() ensures that
1622 * they'll be rendered correctly for the cursor line. */
1623 for (i = 0; i < size; i++)
1624 waddch(view->win, graphic[i]);
1626 view->col += size;
1627 if (size < max) {
1628 waddch(view->win, ' ');
1629 view->col++;
1630 }
1632 return view->width - view->col <= 0;
1633 }
1635 static bool
1636 draw_field(struct view *view, enum line_type type, char *text, int len, bool trim)
1637 {
1638 int max = MIN(view->width - view->col, len);
1639 int col;
1641 if (text)
1642 col = draw_chars(view, type, text, max - 1, trim);
1643 else
1644 col = draw_space(view, type, max - 1, max - 1);
1646 view->col += col + draw_space(view, LINE_DEFAULT, max - col, max - col);
1647 return view->width - view->col <= 0;
1648 }
1650 static bool
1651 draw_date(struct view *view, struct tm *time)
1652 {
1653 char buf[DATE_COLS];
1654 char *date;
1655 int timelen = 0;
1657 if (time)
1658 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, time);
1659 date = timelen ? buf : NULL;
1661 return draw_field(view, LINE_DATE, date, DATE_COLS, FALSE);
1662 }
1664 static bool
1665 draw_view_line(struct view *view, unsigned int lineno)
1666 {
1667 struct line *line;
1668 bool selected = (view->offset + lineno == view->lineno);
1669 bool draw_ok;
1671 assert(view_is_displayed(view));
1673 if (view->offset + lineno >= view->lines)
1674 return FALSE;
1676 line = &view->line[view->offset + lineno];
1678 wmove(view->win, lineno, 0);
1679 view->col = 0;
1680 view->curline = line;
1681 view->curtype = LINE_NONE;
1682 line->selected = FALSE;
1684 if (selected) {
1685 set_view_attr(view, LINE_CURSOR);
1686 line->selected = TRUE;
1687 view->ops->select(view, line);
1688 } else if (line->selected) {
1689 wclrtoeol(view->win);
1690 }
1692 scrollok(view->win, FALSE);
1693 draw_ok = view->ops->draw(view, line, lineno);
1694 scrollok(view->win, TRUE);
1696 return draw_ok;
1697 }
1699 static void
1700 redraw_view_dirty(struct view *view)
1701 {
1702 bool dirty = FALSE;
1703 int lineno;
1705 for (lineno = 0; lineno < view->height; lineno++) {
1706 struct line *line = &view->line[view->offset + lineno];
1708 if (!line->dirty)
1709 continue;
1710 line->dirty = 0;
1711 dirty = TRUE;
1712 if (!draw_view_line(view, lineno))
1713 break;
1714 }
1716 if (!dirty)
1717 return;
1718 redrawwin(view->win);
1719 if (input_mode)
1720 wnoutrefresh(view->win);
1721 else
1722 wrefresh(view->win);
1723 }
1725 static void
1726 redraw_view_from(struct view *view, int lineno)
1727 {
1728 assert(0 <= lineno && lineno < view->height);
1730 for (; lineno < view->height; lineno++) {
1731 if (!draw_view_line(view, lineno))
1732 break;
1733 }
1735 redrawwin(view->win);
1736 if (input_mode)
1737 wnoutrefresh(view->win);
1738 else
1739 wrefresh(view->win);
1740 }
1742 static void
1743 redraw_view(struct view *view)
1744 {
1745 wclear(view->win);
1746 redraw_view_from(view, 0);
1747 }
1750 static void
1751 update_view_title(struct view *view)
1752 {
1753 char buf[SIZEOF_STR];
1754 char state[SIZEOF_STR];
1755 size_t bufpos = 0, statelen = 0;
1757 assert(view_is_displayed(view));
1759 if (view != VIEW(REQ_VIEW_STATUS) && (view->lines || view->pipe)) {
1760 unsigned int view_lines = view->offset + view->height;
1761 unsigned int lines = view->lines
1762 ? MIN(view_lines, view->lines) * 100 / view->lines
1763 : 0;
1765 string_format_from(state, &statelen, "- %s %d of %d (%d%%)",
1766 view->ops->type,
1767 view->lineno + 1,
1768 view->lines,
1769 lines);
1771 if (view->pipe) {
1772 time_t secs = time(NULL) - view->start_time;
1774 /* Three git seconds are a long time ... */
1775 if (secs > 2)
1776 string_format_from(state, &statelen, " %lds", secs);
1777 }
1778 }
1780 string_format_from(buf, &bufpos, "[%s]", view->name);
1781 if (*view->ref && bufpos < view->width) {
1782 size_t refsize = strlen(view->ref);
1783 size_t minsize = bufpos + 1 + /* abbrev= */ 7 + 1 + statelen;
1785 if (minsize < view->width)
1786 refsize = view->width - minsize + 7;
1787 string_format_from(buf, &bufpos, " %.*s", (int) refsize, view->ref);
1788 }
1790 if (statelen && bufpos < view->width) {
1791 string_format_from(buf, &bufpos, " %s", state);
1792 }
1794 if (view == display[current_view])
1795 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1796 else
1797 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1799 mvwaddnstr(view->title, 0, 0, buf, bufpos);
1800 wclrtoeol(view->title);
1801 wmove(view->title, 0, view->width - 1);
1803 if (input_mode)
1804 wnoutrefresh(view->title);
1805 else
1806 wrefresh(view->title);
1807 }
1809 static void
1810 resize_display(void)
1811 {
1812 int offset, i;
1813 struct view *base = display[0];
1814 struct view *view = display[1] ? display[1] : display[0];
1816 /* Setup window dimensions */
1818 getmaxyx(stdscr, base->height, base->width);
1820 /* Make room for the status window. */
1821 base->height -= 1;
1823 if (view != base) {
1824 /* Horizontal split. */
1825 view->width = base->width;
1826 view->height = SCALE_SPLIT_VIEW(base->height);
1827 base->height -= view->height;
1829 /* Make room for the title bar. */
1830 view->height -= 1;
1831 }
1833 /* Make room for the title bar. */
1834 base->height -= 1;
1836 offset = 0;
1838 foreach_displayed_view (view, i) {
1839 if (!view->win) {
1840 view->win = newwin(view->height, 0, offset, 0);
1841 if (!view->win)
1842 die("Failed to create %s view", view->name);
1844 scrollok(view->win, TRUE);
1846 view->title = newwin(1, 0, offset + view->height, 0);
1847 if (!view->title)
1848 die("Failed to create title window");
1850 } else {
1851 wresize(view->win, view->height, view->width);
1852 mvwin(view->win, offset, 0);
1853 mvwin(view->title, offset + view->height, 0);
1854 }
1856 offset += view->height + 1;
1857 }
1858 }
1860 static void
1861 redraw_display(void)
1862 {
1863 struct view *view;
1864 int i;
1866 foreach_displayed_view (view, i) {
1867 redraw_view(view);
1868 update_view_title(view);
1869 }
1870 }
1872 static void
1873 update_display_cursor(struct view *view)
1874 {
1875 /* Move the cursor to the right-most column of the cursor line.
1876 *
1877 * XXX: This could turn out to be a bit expensive, but it ensures that
1878 * the cursor does not jump around. */
1879 if (view->lines) {
1880 wmove(view->win, view->lineno - view->offset, view->width - 1);
1881 wrefresh(view->win);
1882 }
1883 }
1885 /*
1886 * Navigation
1887 */
1889 /* Scrolling backend */
1890 static void
1891 do_scroll_view(struct view *view, int lines)
1892 {
1893 bool redraw_current_line = FALSE;
1895 /* The rendering expects the new offset. */
1896 view->offset += lines;
1898 assert(0 <= view->offset && view->offset < view->lines);
1899 assert(lines);
1901 /* Move current line into the view. */
1902 if (view->lineno < view->offset) {
1903 view->lineno = view->offset;
1904 redraw_current_line = TRUE;
1905 } else if (view->lineno >= view->offset + view->height) {
1906 view->lineno = view->offset + view->height - 1;
1907 redraw_current_line = TRUE;
1908 }
1910 assert(view->offset <= view->lineno && view->lineno < view->lines);
1912 /* Redraw the whole screen if scrolling is pointless. */
1913 if (view->height < ABS(lines)) {
1914 redraw_view(view);
1916 } else {
1917 int line = lines > 0 ? view->height - lines : 0;
1918 int end = line + ABS(lines);
1920 wscrl(view->win, lines);
1922 for (; line < end; line++) {
1923 if (!draw_view_line(view, line))
1924 break;
1925 }
1927 if (redraw_current_line)
1928 draw_view_line(view, view->lineno - view->offset);
1929 }
1931 redrawwin(view->win);
1932 wrefresh(view->win);
1933 report("");
1934 }
1936 /* Scroll frontend */
1937 static void
1938 scroll_view(struct view *view, enum request request)
1939 {
1940 int lines = 1;
1942 assert(view_is_displayed(view));
1944 switch (request) {
1945 case REQ_SCROLL_PAGE_DOWN:
1946 lines = view->height;
1947 case REQ_SCROLL_LINE_DOWN:
1948 if (view->offset + lines > view->lines)
1949 lines = view->lines - view->offset;
1951 if (lines == 0 || view->offset + view->height >= view->lines) {
1952 report("Cannot scroll beyond the last line");
1953 return;
1954 }
1955 break;
1957 case REQ_SCROLL_PAGE_UP:
1958 lines = view->height;
1959 case REQ_SCROLL_LINE_UP:
1960 if (lines > view->offset)
1961 lines = view->offset;
1963 if (lines == 0) {
1964 report("Cannot scroll beyond the first line");
1965 return;
1966 }
1968 lines = -lines;
1969 break;
1971 default:
1972 die("request %d not handled in switch", request);
1973 }
1975 do_scroll_view(view, lines);
1976 }
1978 /* Cursor moving */
1979 static void
1980 move_view(struct view *view, enum request request)
1981 {
1982 int scroll_steps = 0;
1983 int steps;
1985 switch (request) {
1986 case REQ_MOVE_FIRST_LINE:
1987 steps = -view->lineno;
1988 break;
1990 case REQ_MOVE_LAST_LINE:
1991 steps = view->lines - view->lineno - 1;
1992 break;
1994 case REQ_MOVE_PAGE_UP:
1995 steps = view->height > view->lineno
1996 ? -view->lineno : -view->height;
1997 break;
1999 case REQ_MOVE_PAGE_DOWN:
2000 steps = view->lineno + view->height >= view->lines
2001 ? view->lines - view->lineno - 1 : view->height;
2002 break;
2004 case REQ_MOVE_UP:
2005 steps = -1;
2006 break;
2008 case REQ_MOVE_DOWN:
2009 steps = 1;
2010 break;
2012 default:
2013 die("request %d not handled in switch", request);
2014 }
2016 if (steps <= 0 && view->lineno == 0) {
2017 report("Cannot move beyond the first line");
2018 return;
2020 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
2021 report("Cannot move beyond the last line");
2022 return;
2023 }
2025 /* Move the current line */
2026 view->lineno += steps;
2027 assert(0 <= view->lineno && view->lineno < view->lines);
2029 /* Check whether the view needs to be scrolled */
2030 if (view->lineno < view->offset ||
2031 view->lineno >= view->offset + view->height) {
2032 scroll_steps = steps;
2033 if (steps < 0 && -steps > view->offset) {
2034 scroll_steps = -view->offset;
2036 } else if (steps > 0) {
2037 if (view->lineno == view->lines - 1 &&
2038 view->lines > view->height) {
2039 scroll_steps = view->lines - view->offset - 1;
2040 if (scroll_steps >= view->height)
2041 scroll_steps -= view->height - 1;
2042 }
2043 }
2044 }
2046 if (!view_is_displayed(view)) {
2047 view->offset += scroll_steps;
2048 assert(0 <= view->offset && view->offset < view->lines);
2049 view->ops->select(view, &view->line[view->lineno]);
2050 return;
2051 }
2053 /* Repaint the old "current" line if we be scrolling */
2054 if (ABS(steps) < view->height)
2055 draw_view_line(view, view->lineno - steps - view->offset);
2057 if (scroll_steps) {
2058 do_scroll_view(view, scroll_steps);
2059 return;
2060 }
2062 /* Draw the current line */
2063 draw_view_line(view, view->lineno - view->offset);
2065 redrawwin(view->win);
2066 wrefresh(view->win);
2067 report("");
2068 }
2071 /*
2072 * Searching
2073 */
2075 static void search_view(struct view *view, enum request request);
2077 static bool
2078 find_next_line(struct view *view, unsigned long lineno, struct line *line)
2079 {
2080 assert(view_is_displayed(view));
2082 if (!view->ops->grep(view, line))
2083 return FALSE;
2085 if (lineno - view->offset >= view->height) {
2086 view->offset = lineno;
2087 view->lineno = lineno;
2088 redraw_view(view);
2090 } else {
2091 unsigned long old_lineno = view->lineno - view->offset;
2093 view->lineno = lineno;
2094 draw_view_line(view, old_lineno);
2096 draw_view_line(view, view->lineno - view->offset);
2097 redrawwin(view->win);
2098 wrefresh(view->win);
2099 }
2101 report("Line %ld matches '%s'", lineno + 1, view->grep);
2102 return TRUE;
2103 }
2105 static void
2106 find_next(struct view *view, enum request request)
2107 {
2108 unsigned long lineno = view->lineno;
2109 int direction;
2111 if (!*view->grep) {
2112 if (!*opt_search)
2113 report("No previous search");
2114 else
2115 search_view(view, request);
2116 return;
2117 }
2119 switch (request) {
2120 case REQ_SEARCH:
2121 case REQ_FIND_NEXT:
2122 direction = 1;
2123 break;
2125 case REQ_SEARCH_BACK:
2126 case REQ_FIND_PREV:
2127 direction = -1;
2128 break;
2130 default:
2131 return;
2132 }
2134 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
2135 lineno += direction;
2137 /* Note, lineno is unsigned long so will wrap around in which case it
2138 * will become bigger than view->lines. */
2139 for (; lineno < view->lines; lineno += direction) {
2140 struct line *line = &view->line[lineno];
2142 if (find_next_line(view, lineno, line))
2143 return;
2144 }
2146 report("No match found for '%s'", view->grep);
2147 }
2149 static void
2150 search_view(struct view *view, enum request request)
2151 {
2152 int regex_err;
2154 if (view->regex) {
2155 regfree(view->regex);
2156 *view->grep = 0;
2157 } else {
2158 view->regex = calloc(1, sizeof(*view->regex));
2159 if (!view->regex)
2160 return;
2161 }
2163 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
2164 if (regex_err != 0) {
2165 char buf[SIZEOF_STR] = "unknown error";
2167 regerror(regex_err, view->regex, buf, sizeof(buf));
2168 report("Search failed: %s", buf);
2169 return;
2170 }
2172 string_copy(view->grep, opt_search);
2174 find_next(view, request);
2175 }
2177 /*
2178 * Incremental updating
2179 */
2181 static void
2182 end_update(struct view *view, bool force)
2183 {
2184 if (!view->pipe)
2185 return;
2186 while (!view->ops->read(view, NULL))
2187 if (!force)
2188 return;
2189 set_nonblocking_input(FALSE);
2190 if (view->pipe == stdin)
2191 fclose(view->pipe);
2192 else
2193 pclose(view->pipe);
2194 view->pipe = NULL;
2195 }
2197 static bool
2198 begin_update(struct view *view)
2199 {
2200 if (opt_cmd[0]) {
2201 string_copy(view->cmd, opt_cmd);
2202 opt_cmd[0] = 0;
2203 /* When running random commands, initially show the
2204 * command in the title. However, it maybe later be
2205 * overwritten if a commit line is selected. */
2206 if (view == VIEW(REQ_VIEW_PAGER))
2207 string_copy(view->ref, view->cmd);
2208 else
2209 view->ref[0] = 0;
2211 } else if (view == VIEW(REQ_VIEW_TREE)) {
2212 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2213 char path[SIZEOF_STR];
2215 if (strcmp(view->vid, view->id))
2216 opt_path[0] = path[0] = 0;
2217 else if (sq_quote(path, 0, opt_path) >= sizeof(path))
2218 return FALSE;
2220 if (!string_format(view->cmd, format, view->id, path))
2221 return FALSE;
2223 } else {
2224 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
2225 const char *id = view->id;
2227 if (!string_format(view->cmd, format, id, id, id, id, id))
2228 return FALSE;
2230 /* Put the current ref_* value to the view title ref
2231 * member. This is needed by the blob view. Most other
2232 * views sets it automatically after loading because the
2233 * first line is a commit line. */
2234 string_copy_rev(view->ref, view->id);
2235 }
2237 /* Special case for the pager view. */
2238 if (opt_pipe) {
2239 view->pipe = opt_pipe;
2240 opt_pipe = NULL;
2241 } else {
2242 view->pipe = popen(view->cmd, "r");
2243 }
2245 if (!view->pipe)
2246 return FALSE;
2248 set_nonblocking_input(TRUE);
2250 view->offset = 0;
2251 view->lines = 0;
2252 view->lineno = 0;
2253 string_copy_rev(view->vid, view->id);
2255 if (view->line) {
2256 int i;
2258 for (i = 0; i < view->lines; i++)
2259 if (view->line[i].data)
2260 free(view->line[i].data);
2262 free(view->line);
2263 view->line = NULL;
2264 }
2266 view->start_time = time(NULL);
2268 return TRUE;
2269 }
2271 #define ITEM_CHUNK_SIZE 256
2272 static void *
2273 realloc_items(void *mem, size_t *size, size_t new_size, size_t item_size)
2274 {
2275 size_t num_chunks = *size / ITEM_CHUNK_SIZE;
2276 size_t num_chunks_new = (new_size + ITEM_CHUNK_SIZE - 1) / ITEM_CHUNK_SIZE;
2278 if (mem == NULL || num_chunks != num_chunks_new) {
2279 *size = num_chunks_new * ITEM_CHUNK_SIZE;
2280 mem = realloc(mem, *size * item_size);
2281 }
2283 return mem;
2284 }
2286 static struct line *
2287 realloc_lines(struct view *view, size_t line_size)
2288 {
2289 size_t alloc = view->line_alloc;
2290 struct line *tmp = realloc_items(view->line, &alloc, line_size,
2291 sizeof(*view->line));
2293 if (!tmp)
2294 return NULL;
2296 view->line = tmp;
2297 view->line_alloc = alloc;
2298 view->line_size = line_size;
2299 return view->line;
2300 }
2302 static bool
2303 update_view(struct view *view)
2304 {
2305 char in_buffer[BUFSIZ];
2306 char out_buffer[BUFSIZ * 2];
2307 char *line;
2308 /* The number of lines to read. If too low it will cause too much
2309 * redrawing (and possible flickering), if too high responsiveness
2310 * will suffer. */
2311 unsigned long lines = view->height;
2312 int redraw_from = -1;
2314 if (!view->pipe)
2315 return TRUE;
2317 /* Only redraw if lines are visible. */
2318 if (view->offset + view->height >= view->lines)
2319 redraw_from = view->lines - view->offset;
2321 /* FIXME: This is probably not perfect for backgrounded views. */
2322 if (!realloc_lines(view, view->lines + lines))
2323 goto alloc_error;
2325 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
2326 size_t linelen = strlen(line);
2328 if (linelen)
2329 line[linelen - 1] = 0;
2331 if (opt_iconv != ICONV_NONE) {
2332 ICONV_CONST char *inbuf = line;
2333 size_t inlen = linelen;
2335 char *outbuf = out_buffer;
2336 size_t outlen = sizeof(out_buffer);
2338 size_t ret;
2340 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
2341 if (ret != (size_t) -1) {
2342 line = out_buffer;
2343 linelen = strlen(out_buffer);
2344 }
2345 }
2347 if (!view->ops->read(view, line))
2348 goto alloc_error;
2350 if (lines-- == 1)
2351 break;
2352 }
2354 {
2355 int digits;
2357 lines = view->lines;
2358 for (digits = 0; lines; digits++)
2359 lines /= 10;
2361 /* Keep the displayed view in sync with line number scaling. */
2362 if (digits != view->digits) {
2363 view->digits = digits;
2364 redraw_from = 0;
2365 }
2366 }
2368 if (!view_is_displayed(view))
2369 goto check_pipe;
2371 if (view == VIEW(REQ_VIEW_TREE)) {
2372 /* Clear the view and redraw everything since the tree sorting
2373 * might have rearranged things. */
2374 redraw_view(view);
2376 } else if (redraw_from >= 0) {
2377 /* If this is an incremental update, redraw the previous line
2378 * since for commits some members could have changed when
2379 * loading the main view. */
2380 if (redraw_from > 0)
2381 redraw_from--;
2383 /* Since revision graph visualization requires knowledge
2384 * about the parent commit, it causes a further one-off
2385 * needed to be redrawn for incremental updates. */
2386 if (redraw_from > 0 && opt_rev_graph)
2387 redraw_from--;
2389 /* Incrementally draw avoids flickering. */
2390 redraw_view_from(view, redraw_from);
2391 }
2393 if (view == VIEW(REQ_VIEW_BLAME))
2394 redraw_view_dirty(view);
2396 /* Update the title _after_ the redraw so that if the redraw picks up a
2397 * commit reference in view->ref it'll be available here. */
2398 update_view_title(view);
2400 check_pipe:
2401 if (ferror(view->pipe) && errno != 0) {
2402 report("Failed to read: %s", strerror(errno));
2403 end_update(view, TRUE);
2405 } else if (feof(view->pipe)) {
2406 report("");
2407 end_update(view, FALSE);
2408 }
2410 return TRUE;
2412 alloc_error:
2413 report("Allocation failure");
2414 end_update(view, TRUE);
2415 return FALSE;
2416 }
2418 static struct line *
2419 add_line_data(struct view *view, void *data, enum line_type type)
2420 {
2421 struct line *line = &view->line[view->lines++];
2423 memset(line, 0, sizeof(*line));
2424 line->type = type;
2425 line->data = data;
2427 return line;
2428 }
2430 static struct line *
2431 add_line_text(struct view *view, char *data, enum line_type type)
2432 {
2433 if (data)
2434 data = strdup(data);
2436 return data ? add_line_data(view, data, type) : NULL;
2437 }
2440 /*
2441 * View opening
2442 */
2444 enum open_flags {
2445 OPEN_DEFAULT = 0, /* Use default view switching. */
2446 OPEN_SPLIT = 1, /* Split current view. */
2447 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
2448 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
2449 OPEN_NOMAXIMIZE = 8 /* Do not maximize the current view. */
2450 };
2452 static void
2453 open_view(struct view *prev, enum request request, enum open_flags flags)
2454 {
2455 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
2456 bool split = !!(flags & OPEN_SPLIT);
2457 bool reload = !!(flags & OPEN_RELOAD);
2458 bool nomaximize = !!(flags & OPEN_NOMAXIMIZE);
2459 struct view *view = VIEW(request);
2460 int nviews = displayed_views();
2461 struct view *base_view = display[0];
2463 if (view == prev && nviews == 1 && !reload) {
2464 report("Already in %s view", view->name);
2465 return;
2466 }
2468 if (view->git_dir && !opt_git_dir[0]) {
2469 report("The %s view is disabled in pager view", view->name);
2470 return;
2471 }
2473 if (split) {
2474 display[1] = view;
2475 if (!backgrounded)
2476 current_view = 1;
2477 } else if (!nomaximize) {
2478 /* Maximize the current view. */
2479 memset(display, 0, sizeof(display));
2480 current_view = 0;
2481 display[current_view] = view;
2482 }
2484 /* Resize the view when switching between split- and full-screen,
2485 * or when switching between two different full-screen views. */
2486 if (nviews != displayed_views() ||
2487 (nviews == 1 && base_view != display[0]))
2488 resize_display();
2490 if (view->pipe)
2491 end_update(view, TRUE);
2493 if (view->ops->open) {
2494 if (!view->ops->open(view)) {
2495 report("Failed to load %s view", view->name);
2496 return;
2497 }
2499 } else if ((reload || strcmp(view->vid, view->id)) &&
2500 !begin_update(view)) {
2501 report("Failed to load %s view", view->name);
2502 return;
2503 }
2505 if (split && prev->lineno - prev->offset >= prev->height) {
2506 /* Take the title line into account. */
2507 int lines = prev->lineno - prev->offset - prev->height + 1;
2509 /* Scroll the view that was split if the current line is
2510 * outside the new limited view. */
2511 do_scroll_view(prev, lines);
2512 }
2514 if (prev && view != prev) {
2515 if (split && !backgrounded) {
2516 /* "Blur" the previous view. */
2517 update_view_title(prev);
2518 }
2520 view->parent = prev;
2521 }
2523 if (view->pipe && view->lines == 0) {
2524 /* Clear the old view and let the incremental updating refill
2525 * the screen. */
2526 werase(view->win);
2527 report("");
2528 } else {
2529 redraw_view(view);
2530 report("");
2531 }
2533 /* If the view is backgrounded the above calls to report()
2534 * won't redraw the view title. */
2535 if (backgrounded)
2536 update_view_title(view);
2537 }
2539 static void
2540 run_confirm(const char *cmd, const char *prompt)
2541 {
2542 if (prompt_yesno(prompt)) {
2543 system(cmd);
2544 }
2545 }
2547 static void
2548 open_external_viewer(const char *cmd)
2549 {
2550 def_prog_mode(); /* save current tty modes */
2551 endwin(); /* restore original tty modes */
2552 system(cmd);
2553 fprintf(stderr, "Press Enter to continue");
2554 getc(stdin);
2555 reset_prog_mode();
2556 redraw_display();
2557 }
2559 static void
2560 open_mergetool(const char *file)
2561 {
2562 char cmd[SIZEOF_STR];
2563 char file_sq[SIZEOF_STR];
2565 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2566 string_format(cmd, "git mergetool %s", file_sq)) {
2567 open_external_viewer(cmd);
2568 }
2569 }
2571 static void
2572 open_editor(bool from_root, const char *file)
2573 {
2574 char cmd[SIZEOF_STR];
2575 char file_sq[SIZEOF_STR];
2576 char *editor;
2577 char *prefix = from_root ? opt_cdup : "";
2579 editor = getenv("GIT_EDITOR");
2580 if (!editor && *opt_editor)
2581 editor = opt_editor;
2582 if (!editor)
2583 editor = getenv("VISUAL");
2584 if (!editor)
2585 editor = getenv("EDITOR");
2586 if (!editor)
2587 editor = "vi";
2589 if (sq_quote(file_sq, 0, file) < sizeof(file_sq) &&
2590 string_format(cmd, "%s %s%s", editor, prefix, file_sq)) {
2591 open_external_viewer(cmd);
2592 }
2593 }
2595 static void
2596 open_run_request(enum request request)
2597 {
2598 struct run_request *req = get_run_request(request);
2599 char buf[SIZEOF_STR * 2];
2600 size_t bufpos;
2601 char *cmd;
2603 if (!req) {
2604 report("Unknown run request");
2605 return;
2606 }
2608 bufpos = 0;
2609 cmd = req->cmd;
2611 while (cmd) {
2612 char *next = strstr(cmd, "%(");
2613 int len = next - cmd;
2614 char *value;
2616 if (!next) {
2617 len = strlen(cmd);
2618 value = "";
2620 } else if (!strncmp(next, "%(head)", 7)) {
2621 value = ref_head;
2623 } else if (!strncmp(next, "%(commit)", 9)) {
2624 value = ref_commit;
2626 } else if (!strncmp(next, "%(blob)", 7)) {
2627 value = ref_blob;
2629 } else {
2630 report("Unknown replacement in run request: `%s`", req->cmd);
2631 return;
2632 }
2634 if (!string_format_from(buf, &bufpos, "%.*s%s", len, cmd, value))
2635 return;
2637 if (next)
2638 next = strchr(next, ')') + 1;
2639 cmd = next;
2640 }
2642 open_external_viewer(buf);
2643 }
2645 /*
2646 * User request switch noodle
2647 */
2649 static int
2650 view_driver(struct view *view, enum request request)
2651 {
2652 int i;
2654 if (request == REQ_NONE) {
2655 doupdate();
2656 return TRUE;
2657 }
2659 if (request > REQ_NONE) {
2660 open_run_request(request);
2661 /* FIXME: When all views can refresh always do this. */
2662 if (view == VIEW(REQ_VIEW_STATUS) ||
2663 view == VIEW(REQ_VIEW_MAIN) ||
2664 view == VIEW(REQ_VIEW_STAGE))
2665 request = REQ_REFRESH;
2666 else
2667 return TRUE;
2668 }
2670 if (view && view->lines) {
2671 request = view->ops->request(view, request, &view->line[view->lineno]);
2672 if (request == REQ_NONE)
2673 return TRUE;
2674 }
2676 switch (request) {
2677 case REQ_MOVE_UP:
2678 case REQ_MOVE_DOWN:
2679 case REQ_MOVE_PAGE_UP:
2680 case REQ_MOVE_PAGE_DOWN:
2681 case REQ_MOVE_FIRST_LINE:
2682 case REQ_MOVE_LAST_LINE:
2683 move_view(view, request);
2684 break;
2686 case REQ_SCROLL_LINE_DOWN:
2687 case REQ_SCROLL_LINE_UP:
2688 case REQ_SCROLL_PAGE_DOWN:
2689 case REQ_SCROLL_PAGE_UP:
2690 scroll_view(view, request);
2691 break;
2693 case REQ_VIEW_BLAME:
2694 if (!opt_file[0]) {
2695 report("No file chosen, press %s to open tree view",
2696 get_key(REQ_VIEW_TREE));
2697 break;
2698 }
2699 open_view(view, request, OPEN_DEFAULT);
2700 break;
2702 case REQ_VIEW_BLOB:
2703 if (!ref_blob[0]) {
2704 report("No file chosen, press %s to open tree view",
2705 get_key(REQ_VIEW_TREE));
2706 break;
2707 }
2708 open_view(view, request, OPEN_DEFAULT);
2709 break;
2711 case REQ_VIEW_PAGER:
2712 if (!opt_pipe && !VIEW(REQ_VIEW_PAGER)->lines) {
2713 report("No pager content, press %s to run command from prompt",
2714 get_key(REQ_PROMPT));
2715 break;
2716 }
2717 open_view(view, request, OPEN_DEFAULT);
2718 break;
2720 case REQ_VIEW_STAGE:
2721 if (!VIEW(REQ_VIEW_STAGE)->lines) {
2722 report("No stage content, press %s to open the status view and choose file",
2723 get_key(REQ_VIEW_STATUS));
2724 break;
2725 }
2726 open_view(view, request, OPEN_DEFAULT);
2727 break;
2729 case REQ_VIEW_STATUS:
2730 if (opt_is_inside_work_tree == FALSE) {
2731 report("The status view requires a working tree");
2732 break;
2733 }
2734 open_view(view, request, OPEN_DEFAULT);
2735 break;
2737 case REQ_VIEW_MAIN:
2738 case REQ_VIEW_DIFF:
2739 case REQ_VIEW_LOG:
2740 case REQ_VIEW_TREE:
2741 case REQ_VIEW_HELP:
2742 open_view(view, request, OPEN_DEFAULT);
2743 break;
2745 case REQ_NEXT:
2746 case REQ_PREVIOUS:
2747 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2749 if ((view == VIEW(REQ_VIEW_DIFF) &&
2750 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2751 (view == VIEW(REQ_VIEW_DIFF) &&
2752 view->parent == VIEW(REQ_VIEW_BLAME)) ||
2753 (view == VIEW(REQ_VIEW_STAGE) &&
2754 view->parent == VIEW(REQ_VIEW_STATUS)) ||
2755 (view == VIEW(REQ_VIEW_BLOB) &&
2756 view->parent == VIEW(REQ_VIEW_TREE))) {
2757 int line;
2759 view = view->parent;
2760 line = view->lineno;
2761 move_view(view, request);
2762 if (view_is_displayed(view))
2763 update_view_title(view);
2764 if (line != view->lineno)
2765 view->ops->request(view, REQ_ENTER,
2766 &view->line[view->lineno]);
2768 } else {
2769 move_view(view, request);
2770 }
2771 break;
2773 case REQ_VIEW_NEXT:
2774 {
2775 int nviews = displayed_views();
2776 int next_view = (current_view + 1) % nviews;
2778 if (next_view == current_view) {
2779 report("Only one view is displayed");
2780 break;
2781 }
2783 current_view = next_view;
2784 /* Blur out the title of the previous view. */
2785 update_view_title(view);
2786 report("");
2787 break;
2788 }
2789 case REQ_REFRESH:
2790 report("Refreshing is not yet supported for the %s view", view->name);
2791 break;
2793 case REQ_MAXIMIZE:
2794 if (displayed_views() == 2)
2795 open_view(view, VIEW_REQ(view), OPEN_DEFAULT);
2796 break;
2798 case REQ_TOGGLE_LINENO:
2799 opt_line_number = !opt_line_number;
2800 redraw_display();
2801 break;
2803 case REQ_TOGGLE_DATE:
2804 opt_date = !opt_date;
2805 redraw_display();
2806 break;
2808 case REQ_TOGGLE_AUTHOR:
2809 opt_author = !opt_author;
2810 redraw_display();
2811 break;
2813 case REQ_TOGGLE_REV_GRAPH:
2814 opt_rev_graph = !opt_rev_graph;
2815 redraw_display();
2816 break;
2818 case REQ_TOGGLE_REFS:
2819 opt_show_refs = !opt_show_refs;
2820 redraw_display();
2821 break;
2823 case REQ_SEARCH:
2824 case REQ_SEARCH_BACK:
2825 search_view(view, request);
2826 break;
2828 case REQ_FIND_NEXT:
2829 case REQ_FIND_PREV:
2830 find_next(view, request);
2831 break;
2833 case REQ_STOP_LOADING:
2834 for (i = 0; i < ARRAY_SIZE(views); i++) {
2835 view = &views[i];
2836 if (view->pipe)
2837 report("Stopped loading the %s view", view->name),
2838 end_update(view, TRUE);
2839 }
2840 break;
2842 case REQ_SHOW_VERSION:
2843 report("tig-%s (built %s)", TIG_VERSION, __DATE__);
2844 return TRUE;
2846 case REQ_SCREEN_RESIZE:
2847 resize_display();
2848 /* Fall-through */
2849 case REQ_SCREEN_REDRAW:
2850 redraw_display();
2851 break;
2853 case REQ_EDIT:
2854 report("Nothing to edit");
2855 break;
2857 case REQ_ENTER:
2858 report("Nothing to enter");
2859 break;
2861 case REQ_VIEW_CLOSE:
2862 /* XXX: Mark closed views by letting view->parent point to the
2863 * view itself. Parents to closed view should never be
2864 * followed. */
2865 if (view->parent &&
2866 view->parent->parent != view->parent) {
2867 memset(display, 0, sizeof(display));
2868 current_view = 0;
2869 display[current_view] = view->parent;
2870 view->parent = view;
2871 resize_display();
2872 redraw_display();
2873 break;
2874 }
2875 /* Fall-through */
2876 case REQ_QUIT:
2877 return FALSE;
2879 default:
2880 /* An unknown key will show most commonly used commands. */
2881 report("Unknown key, press 'h' for help");
2882 return TRUE;
2883 }
2885 return TRUE;
2886 }
2889 /*
2890 * Pager backend
2891 */
2893 static bool
2894 pager_draw(struct view *view, struct line *line, unsigned int lineno)
2895 {
2896 char *text = line->data;
2898 if (opt_line_number && draw_lineno(view, lineno))
2899 return TRUE;
2901 draw_text(view, line->type, text, TRUE);
2902 return TRUE;
2903 }
2905 static bool
2906 add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
2907 {
2908 char refbuf[SIZEOF_STR];
2909 char *ref = NULL;
2910 FILE *pipe;
2912 if (!string_format(refbuf, "git describe %s 2>/dev/null", commit_id))
2913 return TRUE;
2915 pipe = popen(refbuf, "r");
2916 if (!pipe)
2917 return TRUE;
2919 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2920 ref = chomp_string(ref);
2921 pclose(pipe);
2923 if (!ref || !*ref)
2924 return TRUE;
2926 /* This is the only fatal call, since it can "corrupt" the buffer. */
2927 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
2928 return FALSE;
2930 return TRUE;
2931 }
2933 static void
2934 add_pager_refs(struct view *view, struct line *line)
2935 {
2936 char buf[SIZEOF_STR];
2937 char *commit_id = (char *)line->data + STRING_SIZE("commit ");
2938 struct ref **refs;
2939 size_t bufpos = 0, refpos = 0;
2940 const char *sep = "Refs: ";
2941 bool is_tag = FALSE;
2943 assert(line->type == LINE_COMMIT);
2945 refs = get_refs(commit_id);
2946 if (!refs) {
2947 if (view == VIEW(REQ_VIEW_DIFF))
2948 goto try_add_describe_ref;
2949 return;
2950 }
2952 do {
2953 struct ref *ref = refs[refpos];
2954 char *fmt = ref->tag ? "%s[%s]" :
2955 ref->remote ? "%s<%s>" : "%s%s";
2957 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2958 return;
2959 sep = ", ";
2960 if (ref->tag)
2961 is_tag = TRUE;
2962 } while (refs[refpos++]->next);
2964 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2965 try_add_describe_ref:
2966 /* Add <tag>-g<commit_id> "fake" reference. */
2967 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2968 return;
2969 }
2971 if (bufpos == 0)
2972 return;
2974 if (!realloc_lines(view, view->line_size + 1))
2975 return;
2977 add_line_text(view, buf, LINE_PP_REFS);
2978 }
2980 static bool
2981 pager_read(struct view *view, char *data)
2982 {
2983 struct line *line;
2985 if (!data)
2986 return TRUE;
2988 line = add_line_text(view, data, get_line_type(data));
2989 if (!line)
2990 return FALSE;
2992 if (line->type == LINE_COMMIT &&
2993 (view == VIEW(REQ_VIEW_DIFF) ||
2994 view == VIEW(REQ_VIEW_LOG)))
2995 add_pager_refs(view, line);
2997 return TRUE;
2998 }
3000 static enum request
3001 pager_request(struct view *view, enum request request, struct line *line)
3002 {
3003 int split = 0;
3005 if (request != REQ_ENTER)
3006 return request;
3008 if (line->type == LINE_COMMIT &&
3009 (view == VIEW(REQ_VIEW_LOG) ||
3010 view == VIEW(REQ_VIEW_PAGER))) {
3011 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
3012 split = 1;
3013 }
3015 /* Always scroll the view even if it was split. That way
3016 * you can use Enter to scroll through the log view and
3017 * split open each commit diff. */
3018 scroll_view(view, REQ_SCROLL_LINE_DOWN);
3020 /* FIXME: A minor workaround. Scrolling the view will call report("")
3021 * but if we are scrolling a non-current view this won't properly
3022 * update the view title. */
3023 if (split)
3024 update_view_title(view);
3026 return REQ_NONE;
3027 }
3029 static bool
3030 pager_grep(struct view *view, struct line *line)
3031 {
3032 regmatch_t pmatch;
3033 char *text = line->data;
3035 if (!*text)
3036 return FALSE;
3038 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
3039 return FALSE;
3041 return TRUE;
3042 }
3044 static void
3045 pager_select(struct view *view, struct line *line)
3046 {
3047 if (line->type == LINE_COMMIT) {
3048 char *text = (char *)line->data + STRING_SIZE("commit ");
3050 if (view != VIEW(REQ_VIEW_PAGER))
3051 string_copy_rev(view->ref, text);
3052 string_copy_rev(ref_commit, text);
3053 }
3054 }
3056 static struct view_ops pager_ops = {
3057 "line",
3058 NULL,
3059 pager_read,
3060 pager_draw,
3061 pager_request,
3062 pager_grep,
3063 pager_select,
3064 };
3067 /*
3068 * Help backend
3069 */
3071 static bool
3072 help_open(struct view *view)
3073 {
3074 char buf[BUFSIZ];
3075 int lines = ARRAY_SIZE(req_info) + 2;
3076 int i;
3078 if (view->lines > 0)
3079 return TRUE;
3081 for (i = 0; i < ARRAY_SIZE(req_info); i++)
3082 if (!req_info[i].request)
3083 lines++;
3085 lines += run_requests + 1;
3087 view->line = calloc(lines, sizeof(*view->line));
3088 if (!view->line)
3089 return FALSE;
3091 add_line_text(view, "Quick reference for tig keybindings:", LINE_DEFAULT);
3093 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
3094 char *key;
3096 if (req_info[i].request == REQ_NONE)
3097 continue;
3099 if (!req_info[i].request) {
3100 add_line_text(view, "", LINE_DEFAULT);
3101 add_line_text(view, req_info[i].help, LINE_DEFAULT);
3102 continue;
3103 }
3105 key = get_key(req_info[i].request);
3106 if (!*key)
3107 key = "(no key defined)";
3109 if (!string_format(buf, " %-25s %s", key, req_info[i].help))
3110 continue;
3112 add_line_text(view, buf, LINE_DEFAULT);
3113 }
3115 if (run_requests) {
3116 add_line_text(view, "", LINE_DEFAULT);
3117 add_line_text(view, "External commands:", LINE_DEFAULT);
3118 }
3120 for (i = 0; i < run_requests; i++) {
3121 struct run_request *req = get_run_request(REQ_NONE + i + 1);
3122 char *key;
3124 if (!req)
3125 continue;
3127 key = get_key_name(req->key);
3128 if (!*key)
3129 key = "(no key defined)";
3131 if (!string_format(buf, " %-10s %-14s `%s`",
3132 keymap_table[req->keymap].name,
3133 key, req->cmd))
3134 continue;
3136 add_line_text(view, buf, LINE_DEFAULT);
3137 }
3139 return TRUE;
3140 }
3142 static struct view_ops help_ops = {
3143 "line",
3144 help_open,
3145 NULL,
3146 pager_draw,
3147 pager_request,
3148 pager_grep,
3149 pager_select,
3150 };
3153 /*
3154 * Tree backend
3155 */
3157 struct tree_stack_entry {
3158 struct tree_stack_entry *prev; /* Entry below this in the stack */
3159 unsigned long lineno; /* Line number to restore */
3160 char *name; /* Position of name in opt_path */
3161 };
3163 /* The top of the path stack. */
3164 static struct tree_stack_entry *tree_stack = NULL;
3165 unsigned long tree_lineno = 0;
3167 static void
3168 pop_tree_stack_entry(void)
3169 {
3170 struct tree_stack_entry *entry = tree_stack;
3172 tree_lineno = entry->lineno;
3173 entry->name[0] = 0;
3174 tree_stack = entry->prev;
3175 free(entry);
3176 }
3178 static void
3179 push_tree_stack_entry(char *name, unsigned long lineno)
3180 {
3181 struct tree_stack_entry *entry = calloc(1, sizeof(*entry));
3182 size_t pathlen = strlen(opt_path);
3184 if (!entry)
3185 return;
3187 entry->prev = tree_stack;
3188 entry->name = opt_path + pathlen;
3189 tree_stack = entry;
3191 if (!string_format_from(opt_path, &pathlen, "%s/", name)) {
3192 pop_tree_stack_entry();
3193 return;
3194 }
3196 /* Move the current line to the first tree entry. */
3197 tree_lineno = 1;
3198 entry->lineno = lineno;
3199 }
3201 /* Parse output from git-ls-tree(1):
3202 *
3203 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
3204 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
3205 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
3206 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
3207 */
3209 #define SIZEOF_TREE_ATTR \
3210 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
3212 #define TREE_UP_FORMAT "040000 tree %s\t.."
3214 static int
3215 tree_compare_entry(enum line_type type1, char *name1,
3216 enum line_type type2, char *name2)
3217 {
3218 if (type1 != type2) {
3219 if (type1 == LINE_TREE_DIR)
3220 return -1;
3221 return 1;
3222 }
3224 return strcmp(name1, name2);
3225 }
3227 static char *
3228 tree_path(struct line *line)
3229 {
3230 char *path = line->data;
3232 return path + SIZEOF_TREE_ATTR;
3233 }
3235 static bool
3236 tree_read(struct view *view, char *text)
3237 {
3238 size_t textlen = text ? strlen(text) : 0;
3239 char buf[SIZEOF_STR];
3240 unsigned long pos;
3241 enum line_type type;
3242 bool first_read = view->lines == 0;
3244 if (!text)
3245 return TRUE;
3246 if (textlen <= SIZEOF_TREE_ATTR)
3247 return FALSE;
3249 type = text[STRING_SIZE("100644 ")] == 't'
3250 ? LINE_TREE_DIR : LINE_TREE_FILE;
3252 if (first_read) {
3253 /* Add path info line */
3254 if (!string_format(buf, "Directory path /%s", opt_path) ||
3255 !realloc_lines(view, view->line_size + 1) ||
3256 !add_line_text(view, buf, LINE_DEFAULT))
3257 return FALSE;
3259 /* Insert "link" to parent directory. */
3260 if (*opt_path) {
3261 if (!string_format(buf, TREE_UP_FORMAT, view->ref) ||
3262 !realloc_lines(view, view->line_size + 1) ||
3263 !add_line_text(view, buf, LINE_TREE_DIR))
3264 return FALSE;
3265 }
3266 }
3268 /* Strip the path part ... */
3269 if (*opt_path) {
3270 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
3271 size_t striplen = strlen(opt_path);
3272 char *path = text + SIZEOF_TREE_ATTR;
3274 if (pathlen > striplen)
3275 memmove(path, path + striplen,
3276 pathlen - striplen + 1);
3277 }
3279 /* Skip "Directory ..." and ".." line. */
3280 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
3281 struct line *line = &view->line[pos];
3282 char *path1 = tree_path(line);
3283 char *path2 = text + SIZEOF_TREE_ATTR;
3284 int cmp = tree_compare_entry(line->type, path1, type, path2);
3286 if (cmp <= 0)
3287 continue;
3289 text = strdup(text);
3290 if (!text)
3291 return FALSE;
3293 if (view->lines > pos)
3294 memmove(&view->line[pos + 1], &view->line[pos],
3295 (view->lines - pos) * sizeof(*line));
3297 line = &view->line[pos];
3298 line->data = text;
3299 line->type = type;
3300 view->lines++;
3301 return TRUE;
3302 }
3304 if (!add_line_text(view, text, type))
3305 return FALSE;
3307 if (tree_lineno > view->lineno) {
3308 view->lineno = tree_lineno;
3309 tree_lineno = 0;
3310 }
3312 return TRUE;
3313 }
3315 static enum request
3316 tree_request(struct view *view, enum request request, struct line *line)
3317 {
3318 enum open_flags flags;
3320 if (request == REQ_VIEW_BLAME) {
3321 char *filename = tree_path(line);
3323 if (line->type == LINE_TREE_DIR) {
3324 report("Cannot show blame for directory %s", opt_path);
3325 return REQ_NONE;
3326 }
3328 string_copy(opt_ref, view->vid);
3329 string_format(opt_file, "%s%s", opt_path, filename);
3330 return request;
3331 }
3332 if (request == REQ_TREE_PARENT) {
3333 if (*opt_path) {
3334 /* fake 'cd ..' */
3335 request = REQ_ENTER;
3336 line = &view->line[1];
3337 } else {
3338 /* quit view if at top of tree */
3339 return REQ_VIEW_CLOSE;
3340 }
3341 }
3342 if (request != REQ_ENTER)
3343 return request;
3345 /* Cleanup the stack if the tree view is at a different tree. */
3346 while (!*opt_path && tree_stack)
3347 pop_tree_stack_entry();
3349 switch (line->type) {
3350 case LINE_TREE_DIR:
3351 /* Depending on whether it is a subdir or parent (updir?) link
3352 * mangle the path buffer. */
3353 if (line == &view->line[1] && *opt_path) {
3354 pop_tree_stack_entry();
3356 } else {
3357 char *basename = tree_path(line);
3359 push_tree_stack_entry(basename, view->lineno);
3360 }
3362 /* Trees and subtrees share the same ID, so they are not not
3363 * unique like blobs. */
3364 flags = OPEN_RELOAD;
3365 request = REQ_VIEW_TREE;
3366 break;
3368 case LINE_TREE_FILE:
3369 flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3370 request = REQ_VIEW_BLOB;
3371 break;
3373 default:
3374 return TRUE;
3375 }
3377 open_view(view, request, flags);
3378 if (request == REQ_VIEW_TREE) {
3379 view->lineno = tree_lineno;
3380 }
3382 return REQ_NONE;
3383 }
3385 static void
3386 tree_select(struct view *view, struct line *line)
3387 {
3388 char *text = (char *)line->data + STRING_SIZE("100644 blob ");
3390 if (line->type == LINE_TREE_FILE) {
3391 string_copy_rev(ref_blob, text);
3393 } else if (line->type != LINE_TREE_DIR) {
3394 return;
3395 }
3397 string_copy_rev(view->ref, text);
3398 }
3400 static struct view_ops tree_ops = {
3401 "file",
3402 NULL,
3403 tree_read,
3404 pager_draw,
3405 tree_request,
3406 pager_grep,
3407 tree_select,
3408 };
3410 static bool
3411 blob_read(struct view *view, char *line)
3412 {
3413 if (!line)
3414 return TRUE;
3415 return add_line_text(view, line, LINE_DEFAULT) != NULL;
3416 }
3418 static struct view_ops blob_ops = {
3419 "line",
3420 NULL,
3421 blob_read,
3422 pager_draw,
3423 pager_request,
3424 pager_grep,
3425 pager_select,
3426 };
3428 /*
3429 * Blame backend
3430 *
3431 * Loading the blame view is a two phase job:
3432 *
3433 * 1. File content is read either using opt_file from the
3434 * filesystem or using git-cat-file.
3435 * 2. Then blame information is incrementally added by
3436 * reading output from git-blame.
3437 */
3439 struct blame_commit {
3440 char id[SIZEOF_REV]; /* SHA1 ID. */
3441 char title[128]; /* First line of the commit message. */
3442 char author[75]; /* Author of the commit. */
3443 struct tm time; /* Date from the author ident. */
3444 char filename[128]; /* Name of file. */
3445 };
3447 struct blame {
3448 struct blame_commit *commit;
3449 unsigned int header:1;
3450 char text[1];
3451 };
3453 #define BLAME_CAT_FILE_CMD "git cat-file blob %s:%s"
3454 #define BLAME_INCREMENTAL_CMD "git blame --incremental %s %s"
3456 static bool
3457 blame_open(struct view *view)
3458 {
3459 char path[SIZEOF_STR];
3460 char ref[SIZEOF_STR] = "";
3462 if (sq_quote(path, 0, opt_file) >= sizeof(path))
3463 return FALSE;
3465 if (*opt_ref && sq_quote(ref, 0, opt_ref) >= sizeof(ref))
3466 return FALSE;
3468 if (*opt_ref) {
3469 if (!string_format(view->cmd, BLAME_CAT_FILE_CMD, ref, path))
3470 return FALSE;
3471 } else {
3472 view->pipe = fopen(opt_file, "r");
3473 if (!view->pipe &&
3474 !string_format(view->cmd, BLAME_CAT_FILE_CMD, "HEAD", path))
3475 return FALSE;
3476 }
3478 if (!view->pipe)
3479 view->pipe = popen(view->cmd, "r");
3480 if (!view->pipe)
3481 return FALSE;
3483 if (!string_format(view->cmd, BLAME_INCREMENTAL_CMD, ref, path))
3484 return FALSE;
3486 string_format(view->ref, "%s ...", opt_file);
3487 string_copy_rev(view->vid, opt_file);
3488 set_nonblocking_input(TRUE);
3490 if (view->line) {
3491 int i;
3493 for (i = 0; i < view->lines; i++)
3494 free(view->line[i].data);
3495 free(view->line);
3496 }
3498 view->lines = view->line_alloc = view->line_size = view->lineno = 0;
3499 view->offset = view->lines = view->lineno = 0;
3500 view->line = NULL;
3501 view->start_time = time(NULL);
3503 return TRUE;
3504 }
3506 static struct blame_commit *
3507 get_blame_commit(struct view *view, const char *id)
3508 {
3509 size_t i;
3511 for (i = 0; i < view->lines; i++) {
3512 struct blame *blame = view->line[i].data;
3514 if (!blame->commit)
3515 continue;
3517 if (!strncmp(blame->commit->id, id, SIZEOF_REV - 1))
3518 return blame->commit;
3519 }
3521 {
3522 struct blame_commit *commit = calloc(1, sizeof(*commit));
3524 if (commit)
3525 string_ncopy(commit->id, id, SIZEOF_REV);
3526 return commit;
3527 }
3528 }
3530 static bool
3531 parse_number(char **posref, size_t *number, size_t min, size_t max)
3532 {
3533 char *pos = *posref;
3535 *posref = NULL;
3536 pos = strchr(pos + 1, ' ');
3537 if (!pos || !isdigit(pos[1]))
3538 return FALSE;
3539 *number = atoi(pos + 1);
3540 if (*number < min || *number > max)
3541 return FALSE;
3543 *posref = pos;
3544 return TRUE;
3545 }
3547 static struct blame_commit *
3548 parse_blame_commit(struct view *view, char *text, int *blamed)
3549 {
3550 struct blame_commit *commit;
3551 struct blame *blame;
3552 char *pos = text + SIZEOF_REV - 1;
3553 size_t lineno;
3554 size_t group;
3556 if (strlen(text) <= SIZEOF_REV || *pos != ' ')
3557 return NULL;
3559 if (!parse_number(&pos, &lineno, 1, view->lines) ||
3560 !parse_number(&pos, &group, 1, view->lines - lineno + 1))
3561 return NULL;
3563 commit = get_blame_commit(view, text);
3564 if (!commit)
3565 return NULL;
3567 *blamed += group;
3568 while (group--) {
3569 struct line *line = &view->line[lineno + group - 1];
3571 blame = line->data;
3572 blame->commit = commit;
3573 blame->header = !group;
3574 line->dirty = 1;
3575 }
3577 return commit;
3578 }
3580 static bool
3581 blame_read_file(struct view *view, char *line)
3582 {
3583 if (!line) {
3584 FILE *pipe = NULL;
3586 if (view->lines > 0)
3587 pipe = popen(view->cmd, "r");
3588 else if (!view->parent)
3589 die("No blame exist for %s", view->vid);
3590 view->cmd[0] = 0;
3591 if (!pipe) {
3592 report("Failed to load blame data");
3593 return TRUE;
3594 }
3596 fclose(view->pipe);
3597 view->pipe = pipe;
3598 return FALSE;
3600 } else {
3601 size_t linelen = strlen(line);
3602 struct blame *blame = malloc(sizeof(*blame) + linelen);
3604 blame->commit = NULL;
3605 strncpy(blame->text, line, linelen);
3606 blame->text[linelen] = 0;
3607 return add_line_data(view, blame, LINE_BLAME_ID) != NULL;
3608 }
3609 }
3611 static bool
3612 match_blame_header(const char *name, char **line)
3613 {
3614 size_t namelen = strlen(name);
3615 bool matched = !strncmp(name, *line, namelen);
3617 if (matched)
3618 *line += namelen;
3620 return matched;
3621 }
3623 static bool
3624 blame_read(struct view *view, char *line)
3625 {
3626 static struct blame_commit *commit = NULL;
3627 static int blamed = 0;
3628 static time_t author_time;
3630 if (*view->cmd)
3631 return blame_read_file(view, line);
3633 if (!line) {
3634 /* Reset all! */
3635 commit = NULL;
3636 blamed = 0;
3637 string_format(view->ref, "%s", view->vid);
3638 if (view_is_displayed(view)) {
3639 update_view_title(view);
3640 redraw_view_from(view, 0);
3641 }
3642 return TRUE;
3643 }
3645 if (!commit) {
3646 commit = parse_blame_commit(view, line, &blamed);
3647 string_format(view->ref, "%s %2d%%", view->vid,
3648 blamed * 100 / view->lines);
3650 } else if (match_blame_header("author ", &line)) {
3651 string_ncopy(commit->author, line, strlen(line));
3653 } else if (match_blame_header("author-time ", &line)) {
3654 author_time = (time_t) atol(line);
3656 } else if (match_blame_header("author-tz ", &line)) {
3657 long tz;
3659 tz = ('0' - line[1]) * 60 * 60 * 10;
3660 tz += ('0' - line[2]) * 60 * 60;
3661 tz += ('0' - line[3]) * 60;
3662 tz += ('0' - line[4]) * 60;
3664 if (line[0] == '-')
3665 tz = -tz;
3667 author_time -= tz;
3668 gmtime_r(&author_time, &commit->time);
3670 } else if (match_blame_header("summary ", &line)) {
3671 string_ncopy(commit->title, line, strlen(line));
3673 } else if (match_blame_header("filename ", &line)) {
3674 string_ncopy(commit->filename, line, strlen(line));
3675 commit = NULL;
3676 }
3678 return TRUE;
3679 }
3681 static bool
3682 blame_draw(struct view *view, struct line *line, unsigned int lineno)
3683 {
3684 struct blame *blame = line->data;
3685 struct tm *time = NULL;
3686 char *id = NULL, *author = NULL;
3688 if (blame->commit && *blame->commit->filename) {
3689 id = blame->commit->id;
3690 author = blame->commit->author;
3691 time = &blame->commit->time;
3692 }
3694 if (opt_date && draw_date(view, time))
3695 return TRUE;
3697 if (opt_author &&
3698 draw_field(view, LINE_MAIN_AUTHOR, author, opt_author_cols, TRUE))
3699 return TRUE;
3701 if (draw_field(view, LINE_BLAME_ID, id, ID_COLS, FALSE))
3702 return TRUE;
3704 if (draw_lineno(view, lineno))
3705 return TRUE;
3707 draw_text(view, LINE_DEFAULT, blame->text, TRUE);
3708 return TRUE;
3709 }
3711 static enum request
3712 blame_request(struct view *view, enum request request, struct line *line)
3713 {
3714 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
3715 struct blame *blame = line->data;
3717 switch (request) {
3718 case REQ_ENTER:
3719 if (!blame->commit) {
3720 report("No commit loaded yet");
3721 break;
3722 }
3724 if (!strcmp(blame->commit->id, NULL_ID)) {
3725 char path[SIZEOF_STR];
3727 if (sq_quote(path, 0, view->vid) >= sizeof(path))
3728 break;
3729 string_format(opt_cmd, "git diff-index --root --patch-with-stat -C -M --cached HEAD -- %s 2>/dev/null", path);
3730 }
3732 open_view(view, REQ_VIEW_DIFF, flags);
3733 break;
3735 default:
3736 return request;
3737 }
3739 return REQ_NONE;
3740 }
3742 static bool
3743 blame_grep(struct view *view, struct line *line)
3744 {
3745 struct blame *blame = line->data;
3746 struct blame_commit *commit = blame->commit;
3747 regmatch_t pmatch;
3749 #define MATCH(text, on) \
3750 (on && *text && regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
3752 if (commit) {
3753 char buf[DATE_COLS + 1];
3755 if (MATCH(commit->title, 1) ||
3756 MATCH(commit->author, opt_author) ||
3757 MATCH(commit->id, opt_date))
3758 return TRUE;
3760 if (strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time) &&
3761 MATCH(buf, 1))
3762 return TRUE;
3763 }
3765 return MATCH(blame->text, 1);
3767 #undef MATCH
3768 }
3770 static void
3771 blame_select(struct view *view, struct line *line)
3772 {
3773 struct blame *blame = line->data;
3774 struct blame_commit *commit = blame->commit;
3776 if (!commit)
3777 return;
3779 if (!strcmp(commit->id, NULL_ID))
3780 string_ncopy(ref_commit, "HEAD", 4);
3781 else
3782 string_copy_rev(ref_commit, commit->id);
3783 }
3785 static struct view_ops blame_ops = {
3786 "line",
3787 blame_open,
3788 blame_read,
3789 blame_draw,
3790 blame_request,
3791 blame_grep,
3792 blame_select,
3793 };
3795 /*
3796 * Status backend
3797 */
3799 struct status {
3800 char status;
3801 struct {
3802 mode_t mode;
3803 char rev[SIZEOF_REV];
3804 char name[SIZEOF_STR];
3805 } old;
3806 struct {
3807 mode_t mode;
3808 char rev[SIZEOF_REV];
3809 char name[SIZEOF_STR];
3810 } new;
3811 };
3813 static char status_onbranch[SIZEOF_STR];
3814 static struct status stage_status;
3815 static enum line_type stage_line_type;
3816 static size_t stage_chunks;
3817 static int *stage_chunk;
3819 /* This should work even for the "On branch" line. */
3820 static inline bool
3821 status_has_none(struct view *view, struct line *line)
3822 {
3823 return line < view->line + view->lines && !line[1].data;
3824 }
3826 /* Get fields from the diff line:
3827 * :100644 100644 06a5d6ae9eca55be2e0e585a152e6b1336f2b20e 0000000000000000000000000000000000000000 M
3828 */
3829 static inline bool
3830 status_get_diff(struct status *file, char *buf, size_t bufsize)
3831 {
3832 char *old_mode = buf + 1;
3833 char *new_mode = buf + 8;
3834 char *old_rev = buf + 15;
3835 char *new_rev = buf + 56;
3836 char *status = buf + 97;
3838 if (bufsize < 99 ||
3839 old_mode[-1] != ':' ||
3840 new_mode[-1] != ' ' ||
3841 old_rev[-1] != ' ' ||
3842 new_rev[-1] != ' ' ||
3843 status[-1] != ' ')
3844 return FALSE;
3846 file->status = *status;
3848 string_copy_rev(file->old.rev, old_rev);
3849 string_copy_rev(file->new.rev, new_rev);
3851 file->old.mode = strtoul(old_mode, NULL, 8);
3852 file->new.mode = strtoul(new_mode, NULL, 8);
3854 file->old.name[0] = file->new.name[0] = 0;
3856 return TRUE;
3857 }
3859 static bool
3860 status_run(struct view *view, const char cmd[], char status, enum line_type type)
3861 {
3862 struct status *file = NULL;
3863 struct status *unmerged = NULL;
3864 char buf[SIZEOF_STR * 4];
3865 size_t bufsize = 0;
3866 FILE *pipe;
3868 pipe = popen(cmd, "r");
3869 if (!pipe)
3870 return FALSE;
3872 add_line_data(view, NULL, type);
3874 while (!feof(pipe) && !ferror(pipe)) {
3875 char *sep;
3876 size_t readsize;
3878 readsize = fread(buf + bufsize, 1, sizeof(buf) - bufsize, pipe);
3879 if (!readsize)
3880 break;
3881 bufsize += readsize;
3883 /* Process while we have NUL chars. */
3884 while ((sep = memchr(buf, 0, bufsize))) {
3885 size_t sepsize = sep - buf + 1;
3887 if (!file) {
3888 if (!realloc_lines(view, view->line_size + 1))
3889 goto error_out;
3891 file = calloc(1, sizeof(*file));
3892 if (!file)
3893 goto error_out;
3895 add_line_data(view, file, type);
3896 }
3898 /* Parse diff info part. */
3899 if (status) {
3900 file->status = status;
3901 if (status == 'A')
3902 string_copy(file->old.rev, NULL_ID);
3904 } else if (!file->status) {
3905 if (!status_get_diff(file, buf, sepsize))
3906 goto error_out;
3908 bufsize -= sepsize;
3909 memmove(buf, sep + 1, bufsize);
3911 sep = memchr(buf, 0, bufsize);
3912 if (!sep)
3913 break;
3914 sepsize = sep - buf + 1;
3916 /* Collapse all 'M'odified entries that
3917 * follow a associated 'U'nmerged entry.
3918 */
3919 if (file->status == 'U') {
3920 unmerged = file;
3922 } else if (unmerged) {
3923 int collapse = !strcmp(buf, unmerged->new.name);
3925 unmerged = NULL;
3926 if (collapse) {
3927 free(file);
3928 view->lines--;
3929 continue;
3930 }
3931 }
3932 }
3934 /* Grab the old name for rename/copy. */
3935 if (!*file->old.name &&
3936 (file->status == 'R' || file->status == 'C')) {
3937 sepsize = sep - buf + 1;
3938 string_ncopy(file->old.name, buf, sepsize);
3939 bufsize -= sepsize;
3940 memmove(buf, sep + 1, bufsize);
3942 sep = memchr(buf, 0, bufsize);
3943 if (!sep)
3944 break;
3945 sepsize = sep - buf + 1;
3946 }
3948 /* git-ls-files just delivers a NUL separated
3949 * list of file names similar to the second half
3950 * of the git-diff-* output. */
3951 string_ncopy(file->new.name, buf, sepsize);
3952 if (!*file->old.name)
3953 string_copy(file->old.name, file->new.name);
3954 bufsize -= sepsize;
3955 memmove(buf, sep + 1, bufsize);
3956 file = NULL;
3957 }
3958 }
3960 if (ferror(pipe)) {
3961 error_out:
3962 pclose(pipe);
3963 return FALSE;
3964 }
3966 if (!view->line[view->lines - 1].data)
3967 add_line_data(view, NULL, LINE_STAT_NONE);
3969 pclose(pipe);
3970 return TRUE;
3971 }
3973 /* Don't show unmerged entries in the staged section. */
3974 #define STATUS_DIFF_INDEX_CMD "git diff-index -z --diff-filter=ACDMRTXB --cached -M HEAD"
3975 #define STATUS_DIFF_FILES_CMD "git diff-files -z"
3976 #define STATUS_LIST_OTHER_CMD \
3977 "git ls-files -z --others --exclude-standard"
3978 #define STATUS_LIST_NO_HEAD_CMD \
3979 "git ls-files -z --cached --exclude-standard"
3981 #define STATUS_DIFF_INDEX_SHOW_CMD \
3982 "git diff-index --root --patch-with-stat -C -M --cached HEAD -- %s %s 2>/dev/null"
3984 #define STATUS_DIFF_FILES_SHOW_CMD \
3985 "git diff-files --root --patch-with-stat -C -M -- %s %s 2>/dev/null"
3987 #define STATUS_DIFF_NO_HEAD_SHOW_CMD \
3988 "git diff --no-color --patch-with-stat /dev/null %s 2>/dev/null"
3990 /* First parse staged info using git-diff-index(1), then parse unstaged
3991 * info using git-diff-files(1), and finally untracked files using
3992 * git-ls-files(1). */
3993 static bool
3994 status_open(struct view *view)
3995 {
3996 unsigned long prev_lineno = view->lineno;
3997 size_t i;
3999 for (i = 0; i < view->lines; i++)
4000 free(view->line[i].data);
4001 free(view->line);
4002 view->lines = view->line_alloc = view->line_size = view->lineno = 0;
4003 view->line = NULL;
4005 if (!realloc_lines(view, view->line_size + 7))
4006 return FALSE;
4008 add_line_data(view, NULL, LINE_STAT_HEAD);
4009 if (opt_no_head)
4010 string_copy(status_onbranch, "Initial commit");
4011 else if (!*opt_head)
4012 string_copy(status_onbranch, "Not currently on any branch");
4013 else if (!string_format(status_onbranch, "On branch %s", opt_head))
4014 return FALSE;
4016 system("git update-index -q --refresh >/dev/null 2>/dev/null");
4018 if (opt_no_head &&
4019 !status_run(view, STATUS_LIST_NO_HEAD_CMD, 'A', LINE_STAT_STAGED))
4020 return FALSE;
4021 else if (!status_run(view, STATUS_DIFF_INDEX_CMD, 0, LINE_STAT_STAGED))
4022 return FALSE;
4024 if (!status_run(view, STATUS_DIFF_FILES_CMD, 0, LINE_STAT_UNSTAGED) ||
4025 !status_run(view, STATUS_LIST_OTHER_CMD, '?', LINE_STAT_UNTRACKED))
4026 return FALSE;
4028 /* If all went well restore the previous line number to stay in
4029 * the context or select a line with something that can be
4030 * updated. */
4031 if (prev_lineno >= view->lines)
4032 prev_lineno = view->lines - 1;
4033 while (prev_lineno < view->lines && !view->line[prev_lineno].data)
4034 prev_lineno++;
4035 while (prev_lineno > 0 && !view->line[prev_lineno].data)
4036 prev_lineno--;
4038 /* If the above fails, always skip the "On branch" line. */
4039 if (prev_lineno < view->lines)
4040 view->lineno = prev_lineno;
4041 else
4042 view->lineno = 1;
4044 if (view->lineno < view->offset)
4045 view->offset = view->lineno;
4046 else if (view->offset + view->height <= view->lineno)
4047 view->offset = view->lineno - view->height + 1;
4049 return TRUE;
4050 }
4052 static bool
4053 status_draw(struct view *view, struct line *line, unsigned int lineno)
4054 {
4055 struct status *status = line->data;
4056 enum line_type type;
4057 char *text;
4059 if (!status) {
4060 switch (line->type) {
4061 case LINE_STAT_STAGED:
4062 type = LINE_STAT_SECTION;
4063 text = "Changes to be committed:";
4064 break;
4066 case LINE_STAT_UNSTAGED:
4067 type = LINE_STAT_SECTION;
4068 text = "Changed but not updated:";
4069 break;
4071 case LINE_STAT_UNTRACKED:
4072 type = LINE_STAT_SECTION;
4073 text = "Untracked files:";
4074 break;
4076 case LINE_STAT_NONE:
4077 type = LINE_DEFAULT;
4078 text = " (no files)";
4079 break;
4081 case LINE_STAT_HEAD:
4082 type = LINE_STAT_HEAD;
4083 text = status_onbranch;
4084 break;
4086 default:
4087 return FALSE;
4088 }
4089 } else {
4090 static char buf[] = { '?', ' ', ' ', ' ', 0 };
4092 buf[0] = status->status;
4093 if (draw_text(view, line->type, buf, TRUE))
4094 return TRUE;
4095 type = LINE_DEFAULT;
4096 text = status->new.name;
4097 }
4099 draw_text(view, type, text, TRUE);
4100 return TRUE;
4101 }
4103 static enum request
4104 status_enter(struct view *view, struct line *line)
4105 {
4106 struct status *status = line->data;
4107 char oldpath[SIZEOF_STR] = "";
4108 char newpath[SIZEOF_STR] = "";
4109 char *info;
4110 size_t cmdsize = 0;
4111 enum open_flags split;
4113 if (line->type == LINE_STAT_NONE ||
4114 (!status && line[1].type == LINE_STAT_NONE)) {
4115 report("No file to diff");
4116 return REQ_NONE;
4117 }
4119 if (status) {
4120 if (sq_quote(oldpath, 0, status->old.name) >= sizeof(oldpath))
4121 return REQ_QUIT;
4122 /* Diffs for unmerged entries are empty when pasing the
4123 * new path, so leave it empty. */
4124 if (status->status != 'U' &&
4125 sq_quote(newpath, 0, status->new.name) >= sizeof(newpath))
4126 return REQ_QUIT;
4127 }
4129 if (opt_cdup[0] &&
4130 line->type != LINE_STAT_UNTRACKED &&
4131 !string_format_from(opt_cmd, &cmdsize, "cd %s;", opt_cdup))
4132 return REQ_QUIT;
4134 switch (line->type) {
4135 case LINE_STAT_STAGED:
4136 if (opt_no_head) {
4137 if (!string_format_from(opt_cmd, &cmdsize,
4138 STATUS_DIFF_NO_HEAD_SHOW_CMD,
4139 newpath))
4140 return REQ_QUIT;
4141 } else {
4142 if (!string_format_from(opt_cmd, &cmdsize,
4143 STATUS_DIFF_INDEX_SHOW_CMD,
4144 oldpath, newpath))
4145 return REQ_QUIT;
4146 }
4148 if (status)
4149 info = "Staged changes to %s";
4150 else
4151 info = "Staged changes";
4152 break;
4154 case LINE_STAT_UNSTAGED:
4155 if (!string_format_from(opt_cmd, &cmdsize,
4156 STATUS_DIFF_FILES_SHOW_CMD, oldpath, newpath))
4157 return REQ_QUIT;
4158 if (status)
4159 info = "Unstaged changes to %s";
4160 else
4161 info = "Unstaged changes";
4162 break;
4164 case LINE_STAT_UNTRACKED:
4165 if (opt_pipe)
4166 return REQ_QUIT;
4168 if (!status) {
4169 report("No file to show");
4170 return REQ_NONE;
4171 }
4173 opt_pipe = fopen(status->new.name, "r");
4174 info = "Untracked file %s";
4175 break;
4177 case LINE_STAT_HEAD:
4178 return REQ_NONE;
4180 default:
4181 die("line type %d not handled in switch", line->type);
4182 }
4184 split = view_is_displayed(view) ? OPEN_SPLIT : 0;
4185 open_view(view, REQ_VIEW_STAGE, OPEN_RELOAD | split);
4186 if (view_is_displayed(VIEW(REQ_VIEW_STAGE))) {
4187 if (status) {
4188 stage_status = *status;
4189 } else {
4190 memset(&stage_status, 0, sizeof(stage_status));
4191 }
4193 stage_line_type = line->type;
4194 stage_chunks = 0;
4195 string_format(VIEW(REQ_VIEW_STAGE)->ref, info, stage_status.new.name);
4196 }
4198 return REQ_NONE;
4199 }
4201 static bool
4202 status_exists(struct status *status, enum line_type type)
4203 {
4204 struct view *view = VIEW(REQ_VIEW_STATUS);
4205 struct line *line;
4207 for (line = view->line; line < view->line + view->lines; line++) {
4208 struct status *pos = line->data;
4210 if (line->type == type && pos &&
4211 !strcmp(status->new.name, pos->new.name))
4212 return TRUE;
4213 }
4215 return FALSE;
4216 }
4219 static FILE *
4220 status_update_prepare(enum line_type type)
4221 {
4222 char cmd[SIZEOF_STR];
4223 size_t cmdsize = 0;
4225 if (opt_cdup[0] &&
4226 type != LINE_STAT_UNTRACKED &&
4227 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
4228 return NULL;
4230 switch (type) {
4231 case LINE_STAT_STAGED:
4232 string_add(cmd, cmdsize, "git update-index -z --index-info");
4233 break;
4235 case LINE_STAT_UNSTAGED:
4236 case LINE_STAT_UNTRACKED:
4237 string_add(cmd, cmdsize, "git update-index -z --add --remove --stdin");
4238 break;
4240 default:
4241 die("line type %d not handled in switch", type);
4242 }
4244 return popen(cmd, "w");
4245 }
4247 static bool
4248 status_update_write(FILE *pipe, struct status *status, enum line_type type)
4249 {
4250 char buf[SIZEOF_STR];
4251 size_t bufsize = 0;
4252 size_t written = 0;
4254 switch (type) {
4255 case LINE_STAT_STAGED:
4256 if (!string_format_from(buf, &bufsize, "%06o %s\t%s%c",
4257 status->old.mode,
4258 status->old.rev,
4259 status->old.name, 0))
4260 return FALSE;
4261 break;
4263 case LINE_STAT_UNSTAGED:
4264 case LINE_STAT_UNTRACKED:
4265 if (!string_format_from(buf, &bufsize, "%s%c", status->new.name, 0))
4266 return FALSE;
4267 break;
4269 default:
4270 die("line type %d not handled in switch", type);
4271 }
4273 while (!ferror(pipe) && written < bufsize) {
4274 written += fwrite(buf + written, 1, bufsize - written, pipe);
4275 }
4277 return written == bufsize;
4278 }
4280 static bool
4281 status_update_file(struct status *status, enum line_type type)
4282 {
4283 FILE *pipe = status_update_prepare(type);
4284 bool result;
4286 if (!pipe)
4287 return FALSE;
4289 result = status_update_write(pipe, status, type);
4290 pclose(pipe);
4291 return result;
4292 }
4294 static bool
4295 status_update_files(struct view *view, struct line *line)
4296 {
4297 FILE *pipe = status_update_prepare(line->type);
4298 bool result = TRUE;
4299 struct line *pos = view->line + view->lines;
4300 int files = 0;
4301 int file, done;
4303 if (!pipe)
4304 return FALSE;
4306 for (pos = line; pos < view->line + view->lines && pos->data; pos++)
4307 files++;
4309 for (file = 0, done = 0; result && file < files; line++, file++) {
4310 int almost_done = file * 100 / files;
4312 if (almost_done > done) {
4313 done = almost_done;
4314 string_format(view->ref, "updating file %u of %u (%d%% done)",
4315 file, files, done);
4316 update_view_title(view);
4317 }
4318 result = status_update_write(pipe, line->data, line->type);
4319 }
4321 pclose(pipe);
4322 return result;
4323 }
4325 static bool
4326 status_update(struct view *view)
4327 {
4328 struct line *line = &view->line[view->lineno];
4330 assert(view->lines);
4332 if (!line->data) {
4333 /* This should work even for the "On branch" line. */
4334 if (line < view->line + view->lines && !line[1].data) {
4335 report("Nothing to update");
4336 return FALSE;
4337 }
4339 if (!status_update_files(view, line + 1)) {
4340 report("Failed to update file status");
4341 return FALSE;
4342 }
4344 } else if (!status_update_file(line->data, line->type)) {
4345 report("Failed to update file status");
4346 return FALSE;
4347 }
4349 return TRUE;
4350 }
4352 static bool
4353 status_checkout(struct status *status, enum line_type type, bool has_next)
4354 {
4355 if (!status || type != LINE_STAT_UNSTAGED) {
4356 if (has_next) {
4357 report("Nothing to checkout");
4358 } else if (type == LINE_STAT_UNTRACKED) {
4359 report("Cannot checkout untracked files");
4360 } else if (type == LINE_STAT_STAGED) {
4361 report("Cannot checkout staged files");
4362 } else {
4363 report("Cannot checkout multiple files");
4364 }
4365 return FALSE;
4367 } else {
4368 char cmd[SIZEOF_STR];
4369 char file_sq[SIZEOF_STR];
4371 if (sq_quote(file_sq, 0, status->old.name) < sizeof(file_sq) &&
4372 string_format(cmd, "git checkout %s%s", opt_cdup, file_sq)) {
4373 run_confirm(cmd, "Are you sure you want to overwrite any changes?");
4374 }
4376 return TRUE;
4377 }
4378 }
4380 static enum request
4381 status_request(struct view *view, enum request request, struct line *line)
4382 {
4383 struct status *status = line->data;
4385 switch (request) {
4386 case REQ_STATUS_UPDATE:
4387 if (!status_update(view))
4388 return REQ_NONE;
4389 break;
4391 case REQ_STATUS_CHECKOUT:
4392 if (!status_checkout(status, line->type, status_has_none(view, line)))
4393 return REQ_NONE;
4394 break;
4396 case REQ_STATUS_MERGE:
4397 if (!status || status->status != 'U') {
4398 report("Merging only possible for files with unmerged status ('U').");
4399 return REQ_NONE;
4400 }
4401 open_mergetool(status->new.name);
4402 break;
4404 case REQ_EDIT:
4405 if (!status)
4406 return request;
4408 open_editor(status->status != '?', status->new.name);
4409 break;
4411 case REQ_VIEW_BLAME:
4412 if (status) {
4413 string_copy(opt_file, status->new.name);
4414 opt_ref[0] = 0;
4415 }
4416 return request;
4418 case REQ_ENTER:
4419 /* After returning the status view has been split to
4420 * show the stage view. No further reloading is
4421 * necessary. */
4422 status_enter(view, line);
4423 return REQ_NONE;
4425 case REQ_REFRESH:
4426 /* Simply reload the view. */
4427 break;
4429 default:
4430 return request;
4431 }
4433 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD);
4435 return REQ_NONE;
4436 }
4438 static void
4439 status_select(struct view *view, struct line *line)
4440 {
4441 struct status *status = line->data;
4442 char file[SIZEOF_STR] = "all files";
4443 char *text;
4444 char *key;
4446 if (status && !string_format(file, "'%s'", status->new.name))
4447 return;
4449 if (!status && line[1].type == LINE_STAT_NONE)
4450 line++;
4452 switch (line->type) {
4453 case LINE_STAT_STAGED:
4454 text = "Press %s to unstage %s for commit";
4455 break;
4457 case LINE_STAT_UNSTAGED:
4458 text = "Press %s to stage %s for commit";
4459 break;
4461 case LINE_STAT_UNTRACKED:
4462 text = "Press %s to stage %s for addition";
4463 break;
4465 case LINE_STAT_HEAD:
4466 case LINE_STAT_NONE:
4467 text = "Nothing to update";
4468 break;
4470 default:
4471 die("line type %d not handled in switch", line->type);
4472 }
4474 if (status && status->status == 'U') {
4475 text = "Press %s to resolve conflict in %s";
4476 key = get_key(REQ_STATUS_MERGE);
4478 } else {
4479 key = get_key(REQ_STATUS_UPDATE);
4480 }
4482 string_format(view->ref, text, key, file);
4483 }
4485 static bool
4486 status_grep(struct view *view, struct line *line)
4487 {
4488 struct status *status = line->data;
4489 enum { S_STATUS, S_NAME, S_END } state;
4490 char buf[2] = "?";
4491 regmatch_t pmatch;
4493 if (!status)
4494 return FALSE;
4496 for (state = S_STATUS; state < S_END; state++) {
4497 char *text;
4499 switch (state) {
4500 case S_NAME: text = status->new.name; break;
4501 case S_STATUS:
4502 buf[0] = status->status;
4503 text = buf;
4504 break;
4506 default:
4507 return FALSE;
4508 }
4510 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4511 return TRUE;
4512 }
4514 return FALSE;
4515 }
4517 static struct view_ops status_ops = {
4518 "file",
4519 status_open,
4520 NULL,
4521 status_draw,
4522 status_request,
4523 status_grep,
4524 status_select,
4525 };
4528 static bool
4529 stage_diff_line(FILE *pipe, struct line *line)
4530 {
4531 char *buf = line->data;
4532 size_t bufsize = strlen(buf);
4533 size_t written = 0;
4535 while (!ferror(pipe) && written < bufsize) {
4536 written += fwrite(buf + written, 1, bufsize - written, pipe);
4537 }
4539 fputc('\n', pipe);
4541 return written == bufsize;
4542 }
4544 static bool
4545 stage_diff_write(FILE *pipe, struct line *line, struct line *end)
4546 {
4547 while (line < end) {
4548 if (!stage_diff_line(pipe, line++))
4549 return FALSE;
4550 if (line->type == LINE_DIFF_CHUNK ||
4551 line->type == LINE_DIFF_HEADER)
4552 break;
4553 }
4555 return TRUE;
4556 }
4558 static struct line *
4559 stage_diff_find(struct view *view, struct line *line, enum line_type type)
4560 {
4561 for (; view->line < line; line--)
4562 if (line->type == type)
4563 return line;
4565 return NULL;
4566 }
4568 static bool
4569 stage_update_chunk(struct view *view, struct line *chunk)
4570 {
4571 char cmd[SIZEOF_STR];
4572 size_t cmdsize = 0;
4573 struct line *diff_hdr;
4574 FILE *pipe;
4576 diff_hdr = stage_diff_find(view, chunk, LINE_DIFF_HEADER);
4577 if (!diff_hdr)
4578 return FALSE;
4580 if (opt_cdup[0] &&
4581 !string_format_from(cmd, &cmdsize, "cd %s;", opt_cdup))
4582 return FALSE;
4584 if (!string_format_from(cmd, &cmdsize,
4585 "git apply --whitespace=nowarn --cached %s - && "
4586 "git update-index -q --unmerged --refresh 2>/dev/null",
4587 stage_line_type == LINE_STAT_STAGED ? "-R" : ""))
4588 return FALSE;
4590 pipe = popen(cmd, "w");
4591 if (!pipe)
4592 return FALSE;
4594 if (!stage_diff_write(pipe, diff_hdr, chunk) ||
4595 !stage_diff_write(pipe, chunk, view->line + view->lines))
4596 chunk = NULL;
4598 pclose(pipe);
4600 return chunk ? TRUE : FALSE;
4601 }
4603 static bool
4604 stage_update(struct view *view, struct line *line)
4605 {
4606 struct line *chunk = NULL;
4608 if (!opt_no_head && stage_line_type != LINE_STAT_UNTRACKED)
4609 chunk = stage_diff_find(view, line, LINE_DIFF_CHUNK);
4611 if (chunk) {
4612 if (!stage_update_chunk(view, chunk)) {
4613 report("Failed to apply chunk");
4614 return FALSE;
4615 }
4617 } else if (!stage_status.status) {
4618 view = VIEW(REQ_VIEW_STATUS);
4620 for (line = view->line; line < view->line + view->lines; line++)
4621 if (line->type == stage_line_type)
4622 break;
4624 if (!status_update_files(view, line + 1)) {
4625 report("Failed to update files");
4626 return FALSE;
4627 }
4629 } else if (!status_update_file(&stage_status, stage_line_type)) {
4630 report("Failed to update file");
4631 return FALSE;
4632 }
4634 return TRUE;
4635 }
4637 static void
4638 stage_next(struct view *view, struct line *line)
4639 {
4640 int i;
4642 if (!stage_chunks) {
4643 static size_t alloc = 0;
4644 int *tmp;
4646 for (line = view->line; line < view->line + view->lines; line++) {
4647 if (line->type != LINE_DIFF_CHUNK)
4648 continue;
4650 tmp = realloc_items(stage_chunk, &alloc,
4651 stage_chunks, sizeof(*tmp));
4652 if (!tmp) {
4653 report("Allocation failure");
4654 return;
4655 }
4657 stage_chunk = tmp;
4658 stage_chunk[stage_chunks++] = line - view->line;
4659 }
4660 }
4662 for (i = 0; i < stage_chunks; i++) {
4663 if (stage_chunk[i] > view->lineno) {
4664 do_scroll_view(view, stage_chunk[i] - view->lineno);
4665 report("Chunk %d of %d", i + 1, stage_chunks);
4666 return;
4667 }
4668 }
4670 report("No next chunk found");
4671 }
4673 static enum request
4674 stage_request(struct view *view, enum request request, struct line *line)
4675 {
4676 switch (request) {
4677 case REQ_STATUS_UPDATE:
4678 if (!stage_update(view, line))
4679 return REQ_NONE;
4680 break;
4682 case REQ_STATUS_CHECKOUT:
4683 if (!status_checkout(&stage_status, stage_line_type, FALSE))
4684 return REQ_NONE;
4685 break;
4687 case REQ_STAGE_NEXT:
4688 if (stage_line_type == LINE_STAT_UNTRACKED) {
4689 report("File is untracked; press %s to add",
4690 get_key(REQ_STATUS_UPDATE));
4691 return REQ_NONE;
4692 }
4693 stage_next(view, line);
4694 return REQ_NONE;
4696 case REQ_EDIT:
4697 if (!stage_status.new.name[0])
4698 return request;
4700 open_editor(stage_status.status != '?', stage_status.new.name);
4701 break;
4703 case REQ_REFRESH:
4704 /* Reload everything ... */
4705 break;
4707 case REQ_VIEW_BLAME:
4708 if (stage_status.new.name[0]) {
4709 string_copy(opt_file, stage_status.new.name);
4710 opt_ref[0] = 0;
4711 }
4712 return request;
4714 case REQ_ENTER:
4715 return pager_request(view, request, line);
4717 default:
4718 return request;
4719 }
4721 open_view(view, REQ_VIEW_STATUS, OPEN_RELOAD | OPEN_NOMAXIMIZE);
4723 /* Check whether the staged entry still exists, and close the
4724 * stage view if it doesn't. */
4725 if (!status_exists(&stage_status, stage_line_type))
4726 return REQ_VIEW_CLOSE;
4728 if (stage_line_type == LINE_STAT_UNTRACKED)
4729 opt_pipe = fopen(stage_status.new.name, "r");
4730 else
4731 string_copy(opt_cmd, view->cmd);
4732 open_view(view, REQ_VIEW_STAGE, OPEN_RELOAD | OPEN_NOMAXIMIZE);
4734 return REQ_NONE;
4735 }
4737 static struct view_ops stage_ops = {
4738 "line",
4739 NULL,
4740 pager_read,
4741 pager_draw,
4742 stage_request,
4743 pager_grep,
4744 pager_select,
4745 };
4748 /*
4749 * Revision graph
4750 */
4752 struct commit {
4753 char id[SIZEOF_REV]; /* SHA1 ID. */
4754 char title[128]; /* First line of the commit message. */
4755 char author[75]; /* Author of the commit. */
4756 struct tm time; /* Date from the author ident. */
4757 struct ref **refs; /* Repository references. */
4758 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
4759 size_t graph_size; /* The width of the graph array. */
4760 bool has_parents; /* Rewritten --parents seen. */
4761 };
4763 /* Size of rev graph with no "padding" columns */
4764 #define SIZEOF_REVITEMS (SIZEOF_REVGRAPH - (SIZEOF_REVGRAPH / 2))
4766 struct rev_graph {
4767 struct rev_graph *prev, *next, *parents;
4768 char rev[SIZEOF_REVITEMS][SIZEOF_REV];
4769 size_t size;
4770 struct commit *commit;
4771 size_t pos;
4772 unsigned int boundary:1;
4773 };
4775 /* Parents of the commit being visualized. */
4776 static struct rev_graph graph_parents[4];
4778 /* The current stack of revisions on the graph. */
4779 static struct rev_graph graph_stacks[4] = {
4780 { &graph_stacks[3], &graph_stacks[1], &graph_parents[0] },
4781 { &graph_stacks[0], &graph_stacks[2], &graph_parents[1] },
4782 { &graph_stacks[1], &graph_stacks[3], &graph_parents[2] },
4783 { &graph_stacks[2], &graph_stacks[0], &graph_parents[3] },
4784 };
4786 static inline bool
4787 graph_parent_is_merge(struct rev_graph *graph)
4788 {
4789 return graph->parents->size > 1;
4790 }
4792 static inline void
4793 append_to_rev_graph(struct rev_graph *graph, chtype symbol)
4794 {
4795 struct commit *commit = graph->commit;
4797 if (commit->graph_size < ARRAY_SIZE(commit->graph) - 1)
4798 commit->graph[commit->graph_size++] = symbol;
4799 }
4801 static void
4802 clear_rev_graph(struct rev_graph *graph)
4803 {
4804 graph->boundary = 0;
4805 graph->size = graph->pos = 0;
4806 graph->commit = NULL;
4807 memset(graph->parents, 0, sizeof(*graph->parents));
4808 }
4810 static void
4811 done_rev_graph(struct rev_graph *graph)
4812 {
4813 if (graph_parent_is_merge(graph) &&
4814 graph->pos < graph->size - 1 &&
4815 graph->next->size == graph->size + graph->parents->size - 1) {
4816 size_t i = graph->pos + graph->parents->size - 1;
4818 graph->commit->graph_size = i * 2;
4819 while (i < graph->next->size - 1) {
4820 append_to_rev_graph(graph, ' ');
4821 append_to_rev_graph(graph, '\\');
4822 i++;
4823 }
4824 }
4826 clear_rev_graph(graph);
4827 }
4829 static void
4830 push_rev_graph(struct rev_graph *graph, char *parent)
4831 {
4832 int i;
4834 /* "Collapse" duplicate parents lines.
4835 *
4836 * FIXME: This needs to also update update the drawn graph but
4837 * for now it just serves as a method for pruning graph lines. */
4838 for (i = 0; i < graph->size; i++)
4839 if (!strncmp(graph->rev[i], parent, SIZEOF_REV))
4840 return;
4842 if (graph->size < SIZEOF_REVITEMS) {
4843 string_copy_rev(graph->rev[graph->size++], parent);
4844 }
4845 }
4847 static chtype
4848 get_rev_graph_symbol(struct rev_graph *graph)
4849 {
4850 chtype symbol;
4852 if (graph->boundary)
4853 symbol = REVGRAPH_BOUND;
4854 else if (graph->parents->size == 0)
4855 symbol = REVGRAPH_INIT;
4856 else if (graph_parent_is_merge(graph))
4857 symbol = REVGRAPH_MERGE;
4858 else if (graph->pos >= graph->size)
4859 symbol = REVGRAPH_BRANCH;
4860 else
4861 symbol = REVGRAPH_COMMIT;
4863 return symbol;
4864 }
4866 static void
4867 draw_rev_graph(struct rev_graph *graph)
4868 {
4869 struct rev_filler {
4870 chtype separator, line;
4871 };
4872 enum { DEFAULT, RSHARP, RDIAG, LDIAG };
4873 static struct rev_filler fillers[] = {
4874 { ' ', '|' },
4875 { '`', '.' },
4876 { '\'', ' ' },
4877 { '/', ' ' },
4878 };
4879 chtype symbol = get_rev_graph_symbol(graph);
4880 struct rev_filler *filler;
4881 size_t i;
4883 if (opt_line_graphics)
4884 fillers[DEFAULT].line = line_graphics[LINE_GRAPHIC_VLINE];
4886 filler = &fillers[DEFAULT];
4888 for (i = 0; i < graph->pos; i++) {
4889 append_to_rev_graph(graph, filler->line);
4890 if (graph_parent_is_merge(graph->prev) &&
4891 graph->prev->pos == i)
4892 filler = &fillers[RSHARP];
4894 append_to_rev_graph(graph, filler->separator);
4895 }
4897 /* Place the symbol for this revision. */
4898 append_to_rev_graph(graph, symbol);
4900 if (graph->prev->size > graph->size)
4901 filler = &fillers[RDIAG];
4902 else
4903 filler = &fillers[DEFAULT];
4905 i++;
4907 for (; i < graph->size; i++) {
4908 append_to_rev_graph(graph, filler->separator);
4909 append_to_rev_graph(graph, filler->line);
4910 if (graph_parent_is_merge(graph->prev) &&
4911 i < graph->prev->pos + graph->parents->size)
4912 filler = &fillers[RSHARP];
4913 if (graph->prev->size > graph->size)
4914 filler = &fillers[LDIAG];
4915 }
4917 if (graph->prev->size > graph->size) {
4918 append_to_rev_graph(graph, filler->separator);
4919 if (filler->line != ' ')
4920 append_to_rev_graph(graph, filler->line);
4921 }
4922 }
4924 /* Prepare the next rev graph */
4925 static void
4926 prepare_rev_graph(struct rev_graph *graph)
4927 {
4928 size_t i;
4930 /* First, traverse all lines of revisions up to the active one. */
4931 for (graph->pos = 0; graph->pos < graph->size; graph->pos++) {
4932 if (!strcmp(graph->rev[graph->pos], graph->commit->id))
4933 break;
4935 push_rev_graph(graph->next, graph->rev[graph->pos]);
4936 }
4938 /* Interleave the new revision parent(s). */
4939 for (i = 0; !graph->boundary && i < graph->parents->size; i++)
4940 push_rev_graph(graph->next, graph->parents->rev[i]);
4942 /* Lastly, put any remaining revisions. */
4943 for (i = graph->pos + 1; i < graph->size; i++)
4944 push_rev_graph(graph->next, graph->rev[i]);
4945 }
4947 static void
4948 update_rev_graph(struct rev_graph *graph)
4949 {
4950 /* If this is the finalizing update ... */
4951 if (graph->commit)
4952 prepare_rev_graph(graph);
4954 /* Graph visualization needs a one rev look-ahead,
4955 * so the first update doesn't visualize anything. */
4956 if (!graph->prev->commit)
4957 return;
4959 draw_rev_graph(graph->prev);
4960 done_rev_graph(graph->prev->prev);
4961 }
4964 /*
4965 * Main view backend
4966 */
4968 static bool
4969 main_draw(struct view *view, struct line *line, unsigned int lineno)
4970 {
4971 struct commit *commit = line->data;
4973 if (!*commit->author)
4974 return FALSE;
4976 if (opt_date && draw_date(view, &commit->time))
4977 return TRUE;
4979 if (opt_author &&
4980 draw_field(view, LINE_MAIN_AUTHOR, commit->author, opt_author_cols, TRUE))
4981 return TRUE;
4983 if (opt_rev_graph && commit->graph_size &&
4984 draw_graphic(view, LINE_MAIN_REVGRAPH, commit->graph, commit->graph_size))
4985 return TRUE;
4987 if (opt_show_refs && commit->refs) {
4988 size_t i = 0;
4990 do {
4991 enum line_type type;
4993 if (commit->refs[i]->head)
4994 type = LINE_MAIN_HEAD;
4995 else if (commit->refs[i]->ltag)
4996 type = LINE_MAIN_LOCAL_TAG;
4997 else if (commit->refs[i]->tag)
4998 type = LINE_MAIN_TAG;
4999 else if (commit->refs[i]->tracked)
5000 type = LINE_MAIN_TRACKED;
5001 else if (commit->refs[i]->remote)
5002 type = LINE_MAIN_REMOTE;
5003 else
5004 type = LINE_MAIN_REF;
5006 if (draw_text(view, type, "[", TRUE) ||
5007 draw_text(view, type, commit->refs[i]->name, TRUE) ||
5008 draw_text(view, type, "]", TRUE))
5009 return TRUE;
5011 if (draw_text(view, LINE_DEFAULT, " ", TRUE))
5012 return TRUE;
5013 } while (commit->refs[i++]->next);
5014 }
5016 draw_text(view, LINE_DEFAULT, commit->title, TRUE);
5017 return TRUE;
5018 }
5020 /* Reads git log --pretty=raw output and parses it into the commit struct. */
5021 static bool
5022 main_read(struct view *view, char *line)
5023 {
5024 static struct rev_graph *graph = graph_stacks;
5025 enum line_type type;
5026 struct commit *commit;
5028 if (!line) {
5029 int i;
5031 if (!view->lines && !view->parent)
5032 die("No revisions match the given arguments.");
5033 if (view->lines > 0) {
5034 commit = view->line[view->lines - 1].data;
5035 if (!*commit->author) {
5036 view->lines--;
5037 free(commit);
5038 graph->commit = NULL;
5039 }
5040 }
5041 update_rev_graph(graph);
5043 for (i = 0; i < ARRAY_SIZE(graph_stacks); i++)
5044 clear_rev_graph(&graph_stacks[i]);
5045 return TRUE;
5046 }
5048 type = get_line_type(line);
5049 if (type == LINE_COMMIT) {
5050 commit = calloc(1, sizeof(struct commit));
5051 if (!commit)
5052 return FALSE;
5054 line += STRING_SIZE("commit ");
5055 if (*line == '-') {
5056 graph->boundary = 1;
5057 line++;
5058 }
5060 string_copy_rev(commit->id, line);
5061 commit->refs = get_refs(commit->id);
5062 graph->commit = commit;
5063 add_line_data(view, commit, LINE_MAIN_COMMIT);
5065 while ((line = strchr(line, ' '))) {
5066 line++;
5067 push_rev_graph(graph->parents, line);
5068 commit->has_parents = TRUE;
5069 }
5070 return TRUE;
5071 }
5073 if (!view->lines)
5074 return TRUE;
5075 commit = view->line[view->lines - 1].data;
5077 switch (type) {
5078 case LINE_PARENT:
5079 if (commit->has_parents)
5080 break;
5081 push_rev_graph(graph->parents, line + STRING_SIZE("parent "));
5082 break;
5084 case LINE_AUTHOR:
5085 {
5086 /* Parse author lines where the name may be empty:
5087 * author <email@address.tld> 1138474660 +0100
5088 */
5089 char *ident = line + STRING_SIZE("author ");
5090 char *nameend = strchr(ident, '<');
5091 char *emailend = strchr(ident, '>');
5093 if (!nameend || !emailend)
5094 break;
5096 update_rev_graph(graph);
5097 graph = graph->next;
5099 *nameend = *emailend = 0;
5100 ident = chomp_string(ident);
5101 if (!*ident) {
5102 ident = chomp_string(nameend + 1);
5103 if (!*ident)
5104 ident = "Unknown";
5105 }
5107 string_ncopy(commit->author, ident, strlen(ident));
5109 /* Parse epoch and timezone */
5110 if (emailend[1] == ' ') {
5111 char *secs = emailend + 2;
5112 char *zone = strchr(secs, ' ');
5113 time_t time = (time_t) atol(secs);
5115 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
5116 long tz;
5118 zone++;
5119 tz = ('0' - zone[1]) * 60 * 60 * 10;
5120 tz += ('0' - zone[2]) * 60 * 60;
5121 tz += ('0' - zone[3]) * 60;
5122 tz += ('0' - zone[4]) * 60;
5124 if (zone[0] == '-')
5125 tz = -tz;
5127 time -= tz;
5128 }
5130 gmtime_r(&time, &commit->time);
5131 }
5132 break;
5133 }
5134 default:
5135 /* Fill in the commit title if it has not already been set. */
5136 if (commit->title[0])
5137 break;
5139 /* Require titles to start with a non-space character at the
5140 * offset used by git log. */
5141 if (strncmp(line, " ", 4))
5142 break;
5143 line += 4;
5144 /* Well, if the title starts with a whitespace character,
5145 * try to be forgiving. Otherwise we end up with no title. */
5146 while (isspace(*line))
5147 line++;
5148 if (*line == '\0')
5149 break;
5150 /* FIXME: More graceful handling of titles; append "..." to
5151 * shortened titles, etc. */
5153 string_ncopy(commit->title, line, strlen(line));
5154 }
5156 return TRUE;
5157 }
5159 static enum request
5160 main_request(struct view *view, enum request request, struct line *line)
5161 {
5162 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
5164 switch (request) {
5165 case REQ_ENTER:
5166 open_view(view, REQ_VIEW_DIFF, flags);
5167 break;
5168 case REQ_REFRESH:
5169 string_copy(opt_cmd, view->cmd);
5170 open_view(view, REQ_VIEW_MAIN, OPEN_RELOAD);
5171 break;
5172 default:
5173 return request;
5174 }
5176 return REQ_NONE;
5177 }
5179 static bool
5180 grep_refs(struct ref **refs, regex_t *regex)
5181 {
5182 regmatch_t pmatch;
5183 size_t i = 0;
5185 if (!refs)
5186 return FALSE;
5187 do {
5188 if (regexec(regex, refs[i]->name, 1, &pmatch, 0) != REG_NOMATCH)
5189 return TRUE;
5190 } while (refs[i++]->next);
5192 return FALSE;
5193 }
5195 static bool
5196 main_grep(struct view *view, struct line *line)
5197 {
5198 struct commit *commit = line->data;
5199 enum { S_TITLE, S_AUTHOR, S_DATE, S_REFS, S_END } state;
5200 char buf[DATE_COLS + 1];
5201 regmatch_t pmatch;
5203 for (state = S_TITLE; state < S_END; state++) {
5204 char *text;
5206 switch (state) {
5207 case S_TITLE: text = commit->title; break;
5208 case S_AUTHOR:
5209 if (!opt_author)
5210 continue;
5211 text = commit->author;
5212 break;
5213 case S_DATE:
5214 if (!opt_date)
5215 continue;
5216 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
5217 continue;
5218 text = buf;
5219 break;
5220 case S_REFS:
5221 if (!opt_show_refs)
5222 continue;
5223 if (grep_refs(commit->refs, view->regex) == TRUE)
5224 return TRUE;
5225 continue;
5226 default:
5227 return FALSE;
5228 }
5230 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
5231 return TRUE;
5232 }
5234 return FALSE;
5235 }
5237 static void
5238 main_select(struct view *view, struct line *line)
5239 {
5240 struct commit *commit = line->data;
5242 string_copy_rev(view->ref, commit->id);
5243 string_copy_rev(ref_commit, view->ref);
5244 }
5246 static struct view_ops main_ops = {
5247 "commit",
5248 NULL,
5249 main_read,
5250 main_draw,
5251 main_request,
5252 main_grep,
5253 main_select,
5254 };
5257 /*
5258 * Unicode / UTF-8 handling
5259 *
5260 * NOTE: Much of the following code for dealing with unicode is derived from
5261 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
5262 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
5263 */
5265 /* I've (over)annotated a lot of code snippets because I am not entirely
5266 * confident that the approach taken by this small UTF-8 interface is correct.
5267 * --jonas */
5269 static inline int
5270 unicode_width(unsigned long c)
5271 {
5272 if (c >= 0x1100 &&
5273 (c <= 0x115f /* Hangul Jamo */
5274 || c == 0x2329
5275 || c == 0x232a
5276 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
5277 /* CJK ... Yi */
5278 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
5279 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
5280 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
5281 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
5282 || (c >= 0xffe0 && c <= 0xffe6)
5283 || (c >= 0x20000 && c <= 0x2fffd)
5284 || (c >= 0x30000 && c <= 0x3fffd)))
5285 return 2;
5287 if (c == '\t')
5288 return opt_tab_size;
5290 return 1;
5291 }
5293 /* Number of bytes used for encoding a UTF-8 character indexed by first byte.
5294 * Illegal bytes are set one. */
5295 static const unsigned char utf8_bytes[256] = {
5296 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,
5297 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,
5298 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,
5299 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,
5300 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,
5301 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,
5302 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,
5303 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,
5304 };
5306 /* Decode UTF-8 multi-byte representation into a unicode character. */
5307 static inline unsigned long
5308 utf8_to_unicode(const char *string, size_t length)
5309 {
5310 unsigned long unicode;
5312 switch (length) {
5313 case 1:
5314 unicode = string[0];
5315 break;
5316 case 2:
5317 unicode = (string[0] & 0x1f) << 6;
5318 unicode += (string[1] & 0x3f);
5319 break;
5320 case 3:
5321 unicode = (string[0] & 0x0f) << 12;
5322 unicode += ((string[1] & 0x3f) << 6);
5323 unicode += (string[2] & 0x3f);
5324 break;
5325 case 4:
5326 unicode = (string[0] & 0x0f) << 18;
5327 unicode += ((string[1] & 0x3f) << 12);
5328 unicode += ((string[2] & 0x3f) << 6);
5329 unicode += (string[3] & 0x3f);
5330 break;
5331 case 5:
5332 unicode = (string[0] & 0x0f) << 24;
5333 unicode += ((string[1] & 0x3f) << 18);
5334 unicode += ((string[2] & 0x3f) << 12);
5335 unicode += ((string[3] & 0x3f) << 6);
5336 unicode += (string[4] & 0x3f);
5337 break;
5338 case 6:
5339 unicode = (string[0] & 0x01) << 30;
5340 unicode += ((string[1] & 0x3f) << 24);
5341 unicode += ((string[2] & 0x3f) << 18);
5342 unicode += ((string[3] & 0x3f) << 12);
5343 unicode += ((string[4] & 0x3f) << 6);
5344 unicode += (string[5] & 0x3f);
5345 break;
5346 default:
5347 die("Invalid unicode length");
5348 }
5350 /* Invalid characters could return the special 0xfffd value but NUL
5351 * should be just as good. */
5352 return unicode > 0xffff ? 0 : unicode;
5353 }
5355 /* Calculates how much of string can be shown within the given maximum width
5356 * and sets trimmed parameter to non-zero value if all of string could not be
5357 * shown. If the reserve flag is TRUE, it will reserve at least one
5358 * trailing character, which can be useful when drawing a delimiter.
5359 *
5360 * Returns the number of bytes to output from string to satisfy max_width. */
5361 static size_t
5362 utf8_length(const char *string, int *width, size_t max_width, int *trimmed, bool reserve)
5363 {
5364 const char *start = string;
5365 const char *end = strchr(string, '\0');
5366 unsigned char last_bytes = 0;
5367 size_t last_ucwidth = 0;
5369 *width = 0;
5370 *trimmed = 0;
5372 while (string < end) {
5373 int c = *(unsigned char *) string;
5374 unsigned char bytes = utf8_bytes[c];
5375 size_t ucwidth;
5376 unsigned long unicode;
5378 if (string + bytes > end)
5379 break;
5381 /* Change representation to figure out whether
5382 * it is a single- or double-width character. */
5384 unicode = utf8_to_unicode(string, bytes);
5385 /* FIXME: Graceful handling of invalid unicode character. */
5386 if (!unicode)
5387 break;
5389 ucwidth = unicode_width(unicode);
5390 *width += ucwidth;
5391 if (*width > max_width) {
5392 *trimmed = 1;
5393 *width -= ucwidth;
5394 if (reserve && *width == max_width) {
5395 string -= last_bytes;
5396 *width -= last_ucwidth;
5397 }
5398 break;
5399 }
5401 string += bytes;
5402 last_bytes = bytes;
5403 last_ucwidth = ucwidth;
5404 }
5406 return string - start;
5407 }
5410 /*
5411 * Status management
5412 */
5414 /* Whether or not the curses interface has been initialized. */
5415 static bool cursed = FALSE;
5417 /* The status window is used for polling keystrokes. */
5418 static WINDOW *status_win;
5420 static bool status_empty = TRUE;
5422 /* Update status and title window. */
5423 static void
5424 report(const char *msg, ...)
5425 {
5426 struct view *view = display[current_view];
5428 if (input_mode)
5429 return;
5431 if (!view) {
5432 char buf[SIZEOF_STR];
5433 va_list args;
5435 va_start(args, msg);
5436 if (vsnprintf(buf, sizeof(buf), msg, args) >= sizeof(buf)) {
5437 buf[sizeof(buf) - 1] = 0;
5438 buf[sizeof(buf) - 2] = '.';
5439 buf[sizeof(buf) - 3] = '.';
5440 buf[sizeof(buf) - 4] = '.';
5441 }
5442 va_end(args);
5443 die("%s", buf);
5444 }
5446 if (!status_empty || *msg) {
5447 va_list args;
5449 va_start(args, msg);
5451 wmove(status_win, 0, 0);
5452 if (*msg) {
5453 vwprintw(status_win, msg, args);
5454 status_empty = FALSE;
5455 } else {
5456 status_empty = TRUE;
5457 }
5458 wclrtoeol(status_win);
5459 wrefresh(status_win);
5461 va_end(args);
5462 }
5464 update_view_title(view);
5465 update_display_cursor(view);
5466 }
5468 /* Controls when nodelay should be in effect when polling user input. */
5469 static void
5470 set_nonblocking_input(bool loading)
5471 {
5472 static unsigned int loading_views;
5474 if ((loading == FALSE && loading_views-- == 1) ||
5475 (loading == TRUE && loading_views++ == 0))
5476 nodelay(status_win, loading);
5477 }
5479 static void
5480 init_display(void)
5481 {
5482 int x, y;
5484 /* Initialize the curses library */
5485 if (isatty(STDIN_FILENO)) {
5486 cursed = !!initscr();
5487 } else {
5488 /* Leave stdin and stdout alone when acting as a pager. */
5489 FILE *io = fopen("/dev/tty", "r+");
5491 if (!io)
5492 die("Failed to open /dev/tty");
5493 cursed = !!newterm(NULL, io, io);
5494 }
5496 if (!cursed)
5497 die("Failed to initialize curses");
5499 nonl(); /* Tell curses not to do NL->CR/NL on output */
5500 cbreak(); /* Take input chars one at a time, no wait for \n */
5501 noecho(); /* Don't echo input */
5502 leaveok(stdscr, TRUE);
5504 if (has_colors())
5505 init_colors();
5507 getmaxyx(stdscr, y, x);
5508 status_win = newwin(1, 0, y - 1, 0);
5509 if (!status_win)
5510 die("Failed to create status window");
5512 /* Enable keyboard mapping */
5513 keypad(status_win, TRUE);
5514 wbkgdset(status_win, get_line_attr(LINE_STATUS));
5516 TABSIZE = opt_tab_size;
5517 if (opt_line_graphics) {
5518 line_graphics[LINE_GRAPHIC_VLINE] = ACS_VLINE;
5519 }
5520 }
5522 static bool
5523 prompt_yesno(const char *prompt)
5524 {
5525 enum { WAIT, STOP, CANCEL } status = WAIT;
5526 bool answer = FALSE;
5528 while (status == WAIT) {
5529 struct view *view;
5530 int i, key;
5532 input_mode = TRUE;
5534 foreach_view (view, i)
5535 update_view(view);
5537 input_mode = FALSE;
5539 mvwprintw(status_win, 0, 0, "%s [Yy]/[Nn]", prompt);
5540 wclrtoeol(status_win);
5542 /* Refresh, accept single keystroke of input */
5543 key = wgetch(status_win);
5544 switch (key) {
5545 case ERR:
5546 break;
5548 case 'y':
5549 case 'Y':
5550 answer = TRUE;
5551 status = STOP;
5552 break;
5554 case KEY_ESC:
5555 case KEY_RETURN:
5556 case KEY_ENTER:
5557 case KEY_BACKSPACE:
5558 case 'n':
5559 case 'N':
5560 case '\n':
5561 default:
5562 answer = FALSE;
5563 status = CANCEL;
5564 }
5565 }
5567 /* Clear the status window */
5568 status_empty = FALSE;
5569 report("");
5571 return answer;
5572 }
5574 static char *
5575 read_prompt(const char *prompt)
5576 {
5577 enum { READING, STOP, CANCEL } status = READING;
5578 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
5579 int pos = 0;
5581 while (status == READING) {
5582 struct view *view;
5583 int i, key;
5585 input_mode = TRUE;
5587 foreach_view (view, i)
5588 update_view(view);
5590 input_mode = FALSE;
5592 mvwprintw(status_win, 0, 0, "%s%.*s", prompt, pos, buf);
5593 wclrtoeol(status_win);
5595 /* Refresh, accept single keystroke of input */
5596 key = wgetch(status_win);
5597 switch (key) {
5598 case KEY_RETURN:
5599 case KEY_ENTER:
5600 case '\n':
5601 status = pos ? STOP : CANCEL;
5602 break;
5604 case KEY_BACKSPACE:
5605 if (pos > 0)
5606 pos--;
5607 else
5608 status = CANCEL;
5609 break;
5611 case KEY_ESC:
5612 status = CANCEL;
5613 break;
5615 case ERR:
5616 break;
5618 default:
5619 if (pos >= sizeof(buf)) {
5620 report("Input string too long");
5621 return NULL;
5622 }
5624 if (isprint(key))
5625 buf[pos++] = (char) key;
5626 }
5627 }
5629 /* Clear the status window */
5630 status_empty = FALSE;
5631 report("");
5633 if (status == CANCEL)
5634 return NULL;
5636 buf[pos++] = 0;
5638 return buf;
5639 }
5641 /*
5642 * Repository references
5643 */
5645 static struct ref *refs = NULL;
5646 static size_t refs_alloc = 0;
5647 static size_t refs_size = 0;
5649 /* Id <-> ref store */
5650 static struct ref ***id_refs = NULL;
5651 static size_t id_refs_alloc = 0;
5652 static size_t id_refs_size = 0;
5654 static struct ref **
5655 get_refs(char *id)
5656 {
5657 struct ref ***tmp_id_refs;
5658 struct ref **ref_list = NULL;
5659 size_t ref_list_alloc = 0;
5660 size_t ref_list_size = 0;
5661 size_t i;
5663 for (i = 0; i < id_refs_size; i++)
5664 if (!strcmp(id, id_refs[i][0]->id))
5665 return id_refs[i];
5667 tmp_id_refs = realloc_items(id_refs, &id_refs_alloc, id_refs_size + 1,
5668 sizeof(*id_refs));
5669 if (!tmp_id_refs)
5670 return NULL;
5672 id_refs = tmp_id_refs;
5674 for (i = 0; i < refs_size; i++) {
5675 struct ref **tmp;
5677 if (strcmp(id, refs[i].id))
5678 continue;
5680 tmp = realloc_items(ref_list, &ref_list_alloc,
5681 ref_list_size + 1, sizeof(*ref_list));
5682 if (!tmp) {
5683 if (ref_list)
5684 free(ref_list);
5685 return NULL;
5686 }
5688 ref_list = tmp;
5689 if (ref_list_size > 0)
5690 ref_list[ref_list_size - 1]->next = 1;
5691 ref_list[ref_list_size] = &refs[i];
5693 /* XXX: The properties of the commit chains ensures that we can
5694 * safely modify the shared ref. The repo references will
5695 * always be similar for the same id. */
5696 ref_list[ref_list_size]->next = 0;
5697 ref_list_size++;
5698 }
5700 if (ref_list)
5701 id_refs[id_refs_size++] = ref_list;
5703 return ref_list;
5704 }
5706 static int
5707 read_ref(char *id, size_t idlen, char *name, size_t namelen)
5708 {
5709 struct ref *ref;
5710 bool tag = FALSE;
5711 bool ltag = FALSE;
5712 bool remote = FALSE;
5713 bool tracked = FALSE;
5714 bool check_replace = FALSE;
5715 bool head = FALSE;
5717 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
5718 if (!strcmp(name + namelen - 3, "^{}")) {
5719 namelen -= 3;
5720 name[namelen] = 0;
5721 if (refs_size > 0 && refs[refs_size - 1].ltag == TRUE)
5722 check_replace = TRUE;
5723 } else {
5724 ltag = TRUE;
5725 }
5727 tag = TRUE;
5728 namelen -= STRING_SIZE("refs/tags/");
5729 name += STRING_SIZE("refs/tags/");
5731 } else if (!strncmp(name, "refs/remotes/", STRING_SIZE("refs/remotes/"))) {
5732 remote = TRUE;
5733 namelen -= STRING_SIZE("refs/remotes/");
5734 name += STRING_SIZE("refs/remotes/");
5735 tracked = !strcmp(opt_remote, name);
5737 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
5738 namelen -= STRING_SIZE("refs/heads/");
5739 name += STRING_SIZE("refs/heads/");
5740 head = !strncmp(opt_head, name, namelen);
5742 } else if (!strcmp(name, "HEAD")) {
5743 opt_no_head = FALSE;
5744 return OK;
5745 }
5747 if (check_replace && !strcmp(name, refs[refs_size - 1].name)) {
5748 /* it's an annotated tag, replace the previous sha1 with the
5749 * resolved commit id; relies on the fact git-ls-remote lists
5750 * the commit id of an annotated tag right beofre the commit id
5751 * it points to. */
5752 refs[refs_size - 1].ltag = ltag;
5753 string_copy_rev(refs[refs_size - 1].id, id);
5755 return OK;
5756 }
5757 refs = realloc_items(refs, &refs_alloc, refs_size + 1, sizeof(*refs));
5758 if (!refs)
5759 return ERR;
5761 ref = &refs[refs_size++];
5762 ref->name = malloc(namelen + 1);
5763 if (!ref->name)
5764 return ERR;
5766 strncpy(ref->name, name, namelen);
5767 ref->name[namelen] = 0;
5768 ref->head = head;
5769 ref->tag = tag;
5770 ref->ltag = ltag;
5771 ref->remote = remote;
5772 ref->tracked = tracked;
5773 string_copy_rev(ref->id, id);
5775 return OK;
5776 }
5778 static int
5779 load_refs(void)
5780 {
5781 const char *cmd_env = getenv("TIG_LS_REMOTE");
5782 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
5784 return read_properties(popen(cmd, "r"), "\t", read_ref);
5785 }
5787 static int
5788 read_repo_config_option(char *name, size_t namelen, char *value, size_t valuelen)
5789 {
5790 if (!strcmp(name, "i18n.commitencoding"))
5791 string_ncopy(opt_encoding, value, valuelen);
5793 if (!strcmp(name, "core.editor"))
5794 string_ncopy(opt_editor, value, valuelen);
5796 /* branch.<head>.remote */
5797 if (*opt_head &&
5798 !strncmp(name, "branch.", 7) &&
5799 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
5800 !strcmp(name + 7 + strlen(opt_head), ".remote"))
5801 string_ncopy(opt_remote, value, valuelen);
5803 if (*opt_head && *opt_remote &&
5804 !strncmp(name, "branch.", 7) &&
5805 !strncmp(name + 7, opt_head, strlen(opt_head)) &&
5806 !strcmp(name + 7 + strlen(opt_head), ".merge")) {
5807 size_t from = strlen(opt_remote);
5809 if (!strncmp(value, "refs/heads/", STRING_SIZE("refs/heads/"))) {
5810 value += STRING_SIZE("refs/heads/");
5811 valuelen -= STRING_SIZE("refs/heads/");
5812 }
5814 if (!string_format_from(opt_remote, &from, "/%s", value))
5815 opt_remote[0] = 0;
5816 }
5818 return OK;
5819 }
5821 static int
5822 load_git_config(void)
5823 {
5824 return read_properties(popen(GIT_CONFIG " --list", "r"),
5825 "=", read_repo_config_option);
5826 }
5828 static int
5829 read_repo_info(char *name, size_t namelen, char *value, size_t valuelen)
5830 {
5831 if (!opt_git_dir[0]) {
5832 string_ncopy(opt_git_dir, name, namelen);
5834 } else if (opt_is_inside_work_tree == -1) {
5835 /* This can be 3 different values depending on the
5836 * version of git being used. If git-rev-parse does not
5837 * understand --is-inside-work-tree it will simply echo
5838 * the option else either "true" or "false" is printed.
5839 * Default to true for the unknown case. */
5840 opt_is_inside_work_tree = strcmp(name, "false") ? TRUE : FALSE;
5842 } else if (opt_cdup[0] == ' ') {
5843 string_ncopy(opt_cdup, name, namelen);
5844 } else {
5845 if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
5846 namelen -= STRING_SIZE("refs/heads/");
5847 name += STRING_SIZE("refs/heads/");
5848 string_ncopy(opt_head, name, namelen);
5849 }
5850 }
5852 return OK;
5853 }
5855 static int
5856 load_repo_info(void)
5857 {
5858 int result;
5859 FILE *pipe = popen("(git rev-parse --git-dir --is-inside-work-tree "
5860 " --show-cdup; git symbolic-ref HEAD) 2>/dev/null", "r");
5862 /* XXX: The line outputted by "--show-cdup" can be empty so
5863 * initialize it to something invalid to make it possible to
5864 * detect whether it has been set or not. */
5865 opt_cdup[0] = ' ';
5867 result = read_properties(pipe, "=", read_repo_info);
5868 if (opt_cdup[0] == ' ')
5869 opt_cdup[0] = 0;
5871 return result;
5872 }
5874 static int
5875 read_properties(FILE *pipe, const char *separators,
5876 int (*read_property)(char *, size_t, char *, size_t))
5877 {
5878 char buffer[BUFSIZ];
5879 char *name;
5880 int state = OK;
5882 if (!pipe)
5883 return ERR;
5885 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
5886 char *value;
5887 size_t namelen;
5888 size_t valuelen;
5890 name = chomp_string(name);
5891 namelen = strcspn(name, separators);
5893 if (name[namelen]) {
5894 name[namelen] = 0;
5895 value = chomp_string(name + namelen + 1);
5896 valuelen = strlen(value);
5898 } else {
5899 value = "";
5900 valuelen = 0;
5901 }
5903 state = read_property(name, namelen, value, valuelen);
5904 }
5906 if (state != ERR && ferror(pipe))
5907 state = ERR;
5909 pclose(pipe);
5911 return state;
5912 }
5915 /*
5916 * Main
5917 */
5919 static void __NORETURN
5920 quit(int sig)
5921 {
5922 /* XXX: Restore tty modes and let the OS cleanup the rest! */
5923 if (cursed)
5924 endwin();
5925 exit(0);
5926 }
5928 static void __NORETURN
5929 die(const char *err, ...)
5930 {
5931 va_list args;
5933 endwin();
5935 va_start(args, err);
5936 fputs("tig: ", stderr);
5937 vfprintf(stderr, err, args);
5938 fputs("\n", stderr);
5939 va_end(args);
5941 exit(1);
5942 }
5944 static void
5945 warn(const char *msg, ...)
5946 {
5947 va_list args;
5949 va_start(args, msg);
5950 fputs("tig warning: ", stderr);
5951 vfprintf(stderr, msg, args);
5952 fputs("\n", stderr);
5953 va_end(args);
5954 }
5956 int
5957 main(int argc, char *argv[])
5958 {
5959 struct view *view;
5960 enum request request;
5961 size_t i;
5963 signal(SIGINT, quit);
5965 if (setlocale(LC_ALL, "")) {
5966 char *codeset = nl_langinfo(CODESET);
5968 string_ncopy(opt_codeset, codeset, strlen(codeset));
5969 }
5971 if (load_repo_info() == ERR)
5972 die("Failed to load repo info.");
5974 if (load_options() == ERR)
5975 die("Failed to load user config.");
5977 if (load_git_config() == ERR)
5978 die("Failed to load repo config.");
5980 request = parse_options(argc, argv);
5981 if (request == REQ_NONE)
5982 return 0;
5984 /* Require a git repository unless when running in pager mode. */
5985 if (!opt_git_dir[0] && request != REQ_VIEW_PAGER)
5986 die("Not a git repository");
5988 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
5989 opt_utf8 = FALSE;
5991 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
5992 opt_iconv = iconv_open(opt_codeset, opt_encoding);
5993 if (opt_iconv == ICONV_NONE)
5994 die("Failed to initialize character set conversion");
5995 }
5997 if (*opt_git_dir && load_refs() == ERR)
5998 die("Failed to load refs.");
6000 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
6001 view->cmd_env = getenv(view->cmd_env);
6003 init_display();
6005 while (view_driver(display[current_view], request)) {
6006 int key;
6007 int i;
6009 foreach_view (view, i)
6010 update_view(view);
6012 /* Refresh, accept single keystroke of input */
6013 key = wgetch(status_win);
6015 /* wgetch() with nodelay() enabled returns ERR when there's no
6016 * input. */
6017 if (key == ERR) {
6018 request = REQ_NONE;
6019 continue;
6020 }
6022 request = get_keybinding(display[current_view]->keymap, key);
6024 /* Some low-level request handling. This keeps access to
6025 * status_win restricted. */
6026 switch (request) {
6027 case REQ_PROMPT:
6028 {
6029 char *cmd = read_prompt(":");
6031 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
6032 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
6033 request = REQ_VIEW_DIFF;
6034 } else {
6035 request = REQ_VIEW_PAGER;
6036 }
6038 /* Always reload^Wrerun commands from the prompt. */
6039 open_view(view, request, OPEN_RELOAD);
6040 }
6042 request = REQ_NONE;
6043 break;
6044 }
6045 case REQ_SEARCH:
6046 case REQ_SEARCH_BACK:
6047 {
6048 const char *prompt = request == REQ_SEARCH
6049 ? "/" : "?";
6050 char *search = read_prompt(prompt);
6052 if (search)
6053 string_ncopy(opt_search, search, strlen(search));
6054 else
6055 request = REQ_NONE;
6056 break;
6057 }
6058 case REQ_SCREEN_RESIZE:
6059 {
6060 int height, width;
6062 getmaxyx(stdscr, height, width);
6064 /* Resize the status view and let the view driver take
6065 * care of resizing the displayed views. */
6066 wresize(status_win, 1, width);
6067 mvwin(status_win, height - 1, 0);
6068 wrefresh(status_win);
6069 break;
6070 }
6071 default:
6072 break;
6073 }
6074 }
6076 quit(0);
6078 return 0;
6079 }