~mdw / tig / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
update_view_title: use string_format_from instead of wprintw
[tig] / tig.c
CommitLineData
4a2909a7 1/* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
192d9a60 2 *
5cfbde75
JF		 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.
192d9a60
JF		 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 */
b801d8b2 13
b76c2afc 14#ifndef VERSION
0f11e3a9 15#define VERSION "tig-0.4.git"
b76c2afc
JF		 16#endif
17
8855ada4
JF		 18#ifndef DEBUG
19#define NDEBUG
20#endif
21
22f66b0a 22#include <assert.h>
4c6fabc2 23#include <errno.h>
22f66b0a
JF		 24#include <ctype.h>
25#include <signal.h>
b801d8b2 26#include <stdarg.h>
b801d8b2 27#include <stdio.h>
22f66b0a 28#include <stdlib.h>
b801d8b2 29#include <string.h>
6908bdbd 30#include <unistd.h>
b76c2afc 31#include <time.h>
b801d8b2 32
4af34daa
JF		 33#include <sys/types.h>
34#include <regex.h>
35
6b68fd24
JF		 36#include <locale.h>
37#include <langinfo.h>
38#include <iconv.h>
39
b801d8b2 40#include <curses.h>
b801d8b2 41
e2da526d
JF		 42#if __GNUC__ >= 3
43#define __NORETURN __attribute__((__noreturn__))
44#else
45#define __NORETURN
46#endif
47
48static void __NORETURN die(const char *err, ...);
b801d8b2 49static void report(const char *msg, ...);
4a63c884 50static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
1ba2ae4b 51static void set_nonblocking_input(bool loading);
10e290ee 52static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
6b161b31
JF		 53
54#define ABS(x) ((x) >= 0 ? (x) : -(x))
55#define MIN(x, y) ((x) < (y) ? (x) : (y))
56
57#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
58#define STRING_SIZE(x) (sizeof(x) - 1)
b76c2afc 59
17482b11 60#define SIZEOF_STR 1024 /* Default string size. */
2e8488b4 61#define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
10446330 62#define SIZEOF_REV 41 /* Holds a SHA-1 and an ending NUL */
54efb62b 63#define SIZEOF_REVGRAPH 19 /* Size of revision ancestry graphics. */
b801d8b2 64
82e78006
JF		 65/* This color name can be used to refer to the default term colors. */
66#define COLOR_DEFAULT (-1)
78c70acd 67
6b68fd24
JF		 68#define ICONV_NONE ((iconv_t) -1)
69
82e78006 70/* The format and size of the date column in the main view. */
4c6fabc2 71#define DATE_FORMAT "%Y-%m-%d %H:%M"
6b161b31 72#define DATE_COLS STRING_SIZE("2006-04-29 14:21 ")
4c6fabc2 73
10e290ee
JF		 74#define AUTHOR_COLS 20
75
a28bcc22 76/* The default interval between line numbers. */
4a2909a7 77#define NUMBER_INTERVAL 1
82e78006 78
6706b2ba
JF		 79#define TABSIZE 8
80
a28bcc22
JF		 81#define SCALE_SPLIT_VIEW(height) ((height) * 2 / 3)
82
8eb62770
JF		 83#define TIG_LS_REMOTE \
84 "git ls-remote . 2>/dev/null"
85
86#define TIG_DIFF_CMD \
73fb51d5 87 "git show --root --patch-with-stat --find-copies-harder -B -C %s 2>/dev/null"
8eb62770
JF		 88
89#define TIG_LOG_CMD \
8fee6614 90 "git log --cc --stat -n100 %s 2>/dev/null"
8eb62770
JF		 91
92#define TIG_MAIN_CMD \
8fee6614 93 "git log --topo-order --pretty=raw %s 2>/dev/null"
8eb62770 94
e733ee54
JF		 95#define TIG_TREE_CMD \
96 "git ls-tree %s %s"
97
98#define TIG_BLOB_CMD \
99 "git cat-file blob %s"
100
8eb62770
JF		 101/* XXX: Needs to be defined to the empty string. */
102#define TIG_HELP_CMD ""
103#define TIG_PAGER_CMD ""
104
8855ada4 105/* Some ascii-shorthands fitted into the ncurses namespace. */
a28bcc22
JF		 106#define KEY_TAB '\t'
107#define KEY_RETURN '\r'
4a2909a7
JF		 108#define KEY_ESC 27
109
6706b2ba 110
c34d9c9f 111struct ref {
468876c9 112 char *name; /* Ref name; tag or head names are shortened. */
10446330 113 char id[SIZEOF_REV]; /* Commit SHA1 ID */
468876c9
JF		 114 unsigned int tag:1; /* Is it a tag? */
115 unsigned int next:1; /* For ref lists: are there more refs? */
c34d9c9f
JF		 116};
117
ff26aa29 118static struct ref **get_refs(char *id);
4c6fabc2 119
660e09ad
JF		 120struct int_map {
121 const char *name;
122 int namelen;
123 int value;
124};
125
126static int
127set_from_int_map(struct int_map *map, size_t map_size,
128 int *value, const char *name, int namelen)
129{
130
131 int i;
132
133 for (i = 0; i < map_size; i++)
134 if (namelen == map[i].namelen &&
135 !strncasecmp(name, map[i].name, namelen)) {
136 *value = map[i].value;
137 return OK;
138 }
139
140 return ERR;
141}
142
6706b2ba 143
03a93dbb
JF		 144/*
145 * String helpers
146 */
78c70acd 147
82e78006 148static inline void
9a48919b 149string_ncopy_do(char *dst, size_t dstlen, const char *src, size_t srclen)
82e78006 150{
9a48919b
JF		 151 if (srclen > dstlen - 1)
152 srclen = dstlen - 1;
03a93dbb 153
9a48919b
JF		 154 strncpy(dst, src, srclen);
155 dst[srclen] = 0;
82e78006
JF		 156}
157
9a48919b
JF		 158/* Shorthands for safely copying into a fixed buffer. */
159
82e78006 160#define string_copy(dst, src) \
9a48919b
JF		 161 string_ncopy_do(dst, sizeof(dst), src, sizeof(dst))
162
163#define string_ncopy(dst, src, srclen) \
164 string_ncopy_do(dst, sizeof(dst), src, srclen)
82e78006 165
4a63c884
JF		 166static char *
167chomp_string(char *name)
168{
169 int namelen;
170
171 while (isspace(*name))
172 name++;
173
174 namelen = strlen(name) - 1;
175 while (namelen > 0 && isspace(name[namelen]))
176 name[namelen--] = 0;
177
178 return name;
179}
180
cc2d1364 181static bool
d65ced0d 182string_nformat(char *buf, size_t bufsize, size_t *bufpos, const char *fmt, ...)
cc2d1364
JF		 183{
184 va_list args;
d65ced0d 185 size_t pos = bufpos ? *bufpos : 0;
cc2d1364
JF		 186
187 va_start(args, fmt);
188 pos += vsnprintf(buf + pos, bufsize - pos, fmt, args);
189 va_end(args);
190
191 if (bufpos)
192 *bufpos = pos;
193
194 return pos >= bufsize ? FALSE : TRUE;
195}
196
197#define string_format(buf, fmt, args...) \
198 string_nformat(buf, sizeof(buf), NULL, fmt, args)
199
200#define string_format_from(buf, from, fmt, args...) \
201 string_nformat(buf, sizeof(buf), from, fmt, args)
6706b2ba 202
201f5a18
JF		 203static int
204string_enum_compare(const char *str1, const char *str2, int len)
205{
206 size_t i;
207
208#define string_enum_sep(x) ((x) == '-' || (x) == '_' || (x) == '.')
209
210 /* Diff-Header == DIFF_HEADER */
211 for (i = 0; i < len; i++) {
212 if (toupper(str1[i]) == toupper(str2[i]))
213 continue;
214
215 if (string_enum_sep(str1[i]) &&
216 string_enum_sep(str2[i]))
217 continue;
218
219 return str1[i] - str2[i];
220 }
221
222 return 0;
223}
224
03a93dbb
JF		 225/* Shell quoting
226 *
227 * NOTE: The following is a slightly modified copy of the git project's shell
228 * quoting routines found in the quote.c file.
229 *
230 * Help to copy the thing properly quoted for the shell safety. any single
231 * quote is replaced with '\'', any exclamation point is replaced with '\!',
232 * and the whole thing is enclosed in a
233 *
234 * E.g.
235 * original sq_quote result
236 * name ==> name ==> 'name'
237 * a b ==> a b ==> 'a b'
238 * a'b ==> a'\''b ==> 'a'\''b'
239 * a!b ==> a'\!'b ==> 'a'\!'b'
240 */
241
242static size_t
17482b11 243sq_quote(char buf[SIZEOF_STR], size_t bufsize, const char *src)
03a93dbb
JF		 244{
245 char c;
246
17482b11 247#define BUFPUT(x) do { if (bufsize < SIZEOF_STR) buf[bufsize++] = (x); } while (0)
03a93dbb
JF		 248
249 BUFPUT('\'');
250 while ((c = *src++)) {
251 if (c == '\'' || c == '!') {
252 BUFPUT('\'');
253 BUFPUT('\\');
254 BUFPUT(c);
255 BUFPUT('\'');
256 } else {
257 BUFPUT(c);
258 }
259 }
260 BUFPUT('\'');
261
262 return bufsize;
263}
264
82e78006 265
24b5b3e0
JF		 266/*
267 * User requests
268 */
269
270#define REQ_INFO \
271 /* XXX: Keep the view request first and in sync with views[]. */ \
272 REQ_GROUP("View switching") \
273 REQ_(VIEW_MAIN, "Show main view"), \
274 REQ_(VIEW_DIFF, "Show diff view"), \
275 REQ_(VIEW_LOG, "Show log view"), \
e733ee54
JF		 276 REQ_(VIEW_TREE, "Show tree view"), \
277 REQ_(VIEW_BLOB, "Show blob view"), \
24b5b3e0
JF		 278 REQ_(VIEW_HELP, "Show help page"), \
279 REQ_(VIEW_PAGER, "Show pager view"), \
280 \
281 REQ_GROUP("View manipulation") \
282 REQ_(ENTER, "Enter current line and scroll"), \
283 REQ_(NEXT, "Move to next"), \
284 REQ_(PREVIOUS, "Move to previous"), \
285 REQ_(VIEW_NEXT, "Move focus to next view"), \
286 REQ_(VIEW_CLOSE, "Close the current view"), \
287 REQ_(QUIT, "Close all views and quit"), \
288 \
289 REQ_GROUP("Cursor navigation") \
290 REQ_(MOVE_UP, "Move cursor one line up"), \
291 REQ_(MOVE_DOWN, "Move cursor one line down"), \
292 REQ_(MOVE_PAGE_DOWN, "Move cursor one page down"), \
293 REQ_(MOVE_PAGE_UP, "Move cursor one page up"), \
294 REQ_(MOVE_FIRST_LINE, "Move cursor to first line"), \
295 REQ_(MOVE_LAST_LINE, "Move cursor to last line"), \
296 \
297 REQ_GROUP("Scrolling") \
298 REQ_(SCROLL_LINE_UP, "Scroll one line up"), \
299 REQ_(SCROLL_LINE_DOWN, "Scroll one line down"), \
300 REQ_(SCROLL_PAGE_UP, "Scroll one page up"), \
301 REQ_(SCROLL_PAGE_DOWN, "Scroll one page down"), \
302 \
4af34daa
JF		 303 REQ_GROUP("Searching") \
304 REQ_(SEARCH, "Search the view"), \
305 REQ_(SEARCH_BACK, "Search backwards in the view"), \
306 REQ_(FIND_NEXT, "Find next search match"), \
307 REQ_(FIND_PREV, "Find previous search match"), \
308 \
24b5b3e0 309 REQ_GROUP("Misc") \
1d754561 310 REQ_(NONE, "Do nothing"), \
24b5b3e0 311 REQ_(PROMPT, "Bring up the prompt"), \
24b5b3e0
JF		 312 REQ_(SCREEN_REDRAW, "Redraw the screen"), \
313 REQ_(SCREEN_RESIZE, "Resize the screen"), \
314 REQ_(SHOW_VERSION, "Show version information"), \
315 REQ_(STOP_LOADING, "Stop all loading views"), \
54efb62b 316 REQ_(TOGGLE_LINENO, "Toggle line numbers"), \
04e2b7b2 317 REQ_(TOGGLE_REV_GRAPH, "Toggle revision graph visualization")
24b5b3e0
JF		 318
319
320/* User action requests. */
321enum request {
322#define REQ_GROUP(help)
323#define REQ_(req, help) REQ_##req
324
325 /* Offset all requests to avoid conflicts with ncurses getch values. */
326 REQ_OFFSET = KEY_MAX + 1,
04e2b7b2
JF		 327 REQ_INFO,
328 REQ_UNKNOWN,
24b5b3e0
JF		 329
330#undef REQ_GROUP
331#undef REQ_
332};
333
334struct request_info {
335 enum request request;
04e2b7b2
JF		 336 char *name;
337 int namelen;
24b5b3e0
JF		 338 char *help;
339};
340
341static struct request_info req_info[] = {
04e2b7b2
JF		 342#define REQ_GROUP(help) { 0, NULL, 0, (help) },
343#define REQ_(req, help) { REQ_##req, (#req), STRING_SIZE(#req), (help) }
24b5b3e0
JF		 344 REQ_INFO
345#undef REQ_GROUP
346#undef REQ_
347};
348
04e2b7b2
JF		 349static enum request
350get_request(const char *name)
351{
352 int namelen = strlen(name);
353 int i;
354
355 for (i = 0; i < ARRAY_SIZE(req_info); i++)
356 if (req_info[i].namelen == namelen &&
357 !string_enum_compare(req_info[i].name, name, namelen))
358 return req_info[i].request;
359
360 return REQ_UNKNOWN;
361}
362
363
8eb62770
JF		 364/*
365 * Options
366 */
b76c2afc 367
4b8c01a3
JF		 368static const char usage[] =
369VERSION " (" __DATE__ ")\n"
370"\n"
371"Usage: tig [options]\n"
372" or: tig [options] [--] [git log options]\n"
373" or: tig [options] log [git log options]\n"
374" or: tig [options] diff [git diff options]\n"
375" or: tig [options] show [git show options]\n"
376" or: tig [options] < [git command output]\n"
377"\n"
378"Options:\n"
379" -l Start up in log view\n"
380" -d Start up in diff view\n"
381" -n[I], --line-number[=I] Show line numbers with given interval\n"
b3c965c9 382" -b[N], --tab-size[=N] Set number of spaces for tab expansion\n"
4b8c01a3
JF		 383" -- Mark end of tig options\n"
384" -v, --version Show version and exit\n"
385" -h, --help Show help message and exit\n";
386
6706b2ba 387/* Option and state variables. */
92d30f5c
JF		 388static bool opt_line_number = FALSE;
389static bool opt_rev_graph = TRUE;
390static int opt_num_interval = NUMBER_INTERVAL;
391static int opt_tab_size = TABSIZE;
392static enum request opt_request = REQ_VIEW_MAIN;
393static char opt_cmd[SIZEOF_STR] = "";
e733ee54 394static char opt_path[SIZEOF_STR] = "";
92d30f5c
JF		 395static FILE *opt_pipe = NULL;
396static char opt_encoding[20] = "UTF-8";
397static bool opt_utf8 = TRUE;
398static char opt_codeset[20] = "UTF-8";
399static iconv_t opt_iconv = ICONV_NONE;
400static char opt_search[SIZEOF_STR] = "";
b76c2afc 401
6dbf6c19
JF		 402enum option_type {
403 OPT_NONE,
404 OPT_INT,
405};
406
407static bool
408check_option(char *opt, char short_name, char *name, enum option_type type, ...)
409{
410 va_list args;
411 char *value = "";
412 int *number;
413
414 if (opt[0] != '-')
415 return FALSE;
416
417 if (opt[1] == '-') {
418 int namelen = strlen(name);
419
420 opt += 2;
421
422 if (strncmp(opt, name, namelen))
423 return FALSE;
424
425 if (opt[namelen] == '=')
426 value = opt + namelen + 1;
427
428 } else {
429 if (!short_name || opt[1] != short_name)
430 return FALSE;
431 value = opt + 2;
432 }
433
434 va_start(args, type);
435 if (type == OPT_INT) {
436 number = va_arg(args, int *);
437 if (isdigit(*value))
438 *number = atoi(value);
439 }
440 va_end(args);
441
442 return TRUE;
443}
444
b76c2afc 445/* Returns the index of log or diff command or -1 to exit. */
8855ada4 446static bool
b76c2afc
JF		 447parse_options(int argc, char *argv[])
448{
449 int i;
450
451 for (i = 1; i < argc; i++) {
452 char *opt = argv[i];
453
6b161b31 454 if (!strcmp(opt, "-l")) {
4a2909a7 455 opt_request = REQ_VIEW_LOG;
6b161b31
JF		 456 continue;
457 }
b76c2afc 458
6b161b31 459 if (!strcmp(opt, "-d")) {
4a2909a7 460 opt_request = REQ_VIEW_DIFF;
6b161b31
JF		 461 continue;
462 }
b76c2afc 463
6dbf6c19 464 if (check_option(opt, 'n', "line-number", OPT_INT, &opt_num_interval)) {
6b161b31
JF		 465 opt_line_number = TRUE;
466 continue;
467 }
b76c2afc 468
6dbf6c19
JF		 469 if (check_option(opt, 'b', "tab-size", OPT_INT, &opt_tab_size)) {
470 opt_tab_size = MIN(opt_tab_size, TABSIZE);
6706b2ba
JF		 471 continue;
472 }
473
6dbf6c19 474 if (check_option(opt, 'v', "version", OPT_NONE)) {
b76c2afc 475 printf("tig version %s\n", VERSION);
8855ada4 476 return FALSE;
6b161b31 477 }
b76c2afc 478
6dbf6c19 479 if (check_option(opt, 'h', "help", OPT_NONE)) {
4b8c01a3
JF		 480 printf(usage);
481 return FALSE;
482 }
483
6908bdbd
JF		 484 if (!strcmp(opt, "--")) {
485 i++;
486 break;
487 }
03a93dbb 488
8855ada4
JF		 489 if (!strcmp(opt, "log") ||
490 !strcmp(opt, "diff") ||
491 !strcmp(opt, "show")) {
492 opt_request = opt[0] == 'l'
493 ? REQ_VIEW_LOG : REQ_VIEW_DIFF;
494 break;
495 }
496
03a93dbb 497 if (opt[0] && opt[0] != '-')
6908bdbd 498 break;
6b161b31 499
bf174187 500 die("unknown option '%s'\n\n%s", opt, usage);
b76c2afc
JF		 501 }
502
6908bdbd 503 if (!isatty(STDIN_FILENO)) {
6908bdbd
JF		 504 opt_request = REQ_VIEW_PAGER;
505 opt_pipe = stdin;
506
507 } else if (i < argc) {
508 size_t buf_size;
509
6908bdbd 510 if (opt_request == REQ_VIEW_MAIN)
8855ada4
JF		 511 /* XXX: This is vulnerable to the user overriding
512 * options required for the main view parser. */
6908bdbd
JF		 513 string_copy(opt_cmd, "git log --stat --pretty=raw");
514 else
515 string_copy(opt_cmd, "git");
516 buf_size = strlen(opt_cmd);
517
518 while (buf_size < sizeof(opt_cmd) && i < argc) {
519 opt_cmd[buf_size++] = ' ';
520 buf_size = sq_quote(opt_cmd, buf_size, argv[i++]);
521 }
522
523 if (buf_size >= sizeof(opt_cmd))
524 die("command too long");
525
526 opt_cmd[buf_size] = 0;
527
528 }
529
afdc35b3
JF		 530 if (*opt_encoding && strcasecmp(opt_encoding, "UTF-8"))
531 opt_utf8 = FALSE;
532
8855ada4 533 return TRUE;
b76c2afc
JF		 534}
535
536
54efb62b
JF		 537/*
538 * Line-oriented content detection.
539 */
540
2e8488b4 541#define LINE_INFO \
660e09ad 542LINE(DIFF_HEADER, "diff --git ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
a28bcc22
JF		 543LINE(DIFF_CHUNK, "@@", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
544LINE(DIFF_ADD, "+", COLOR_GREEN, COLOR_DEFAULT, 0), \
545LINE(DIFF_DEL, "-", COLOR_RED, COLOR_DEFAULT, 0), \
660e09ad
JF		 546LINE(DIFF_INDEX, "index ", COLOR_BLUE, COLOR_DEFAULT, 0), \
547LINE(DIFF_OLDMODE, "old file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
548LINE(DIFF_NEWMODE, "new file mode ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
549LINE(DIFF_COPY_FROM, "copy from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
550LINE(DIFF_COPY_TO, "copy to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
551LINE(DIFF_RENAME_FROM, "rename from", COLOR_YELLOW, COLOR_DEFAULT, 0), \
552LINE(DIFF_RENAME_TO, "rename to", COLOR_YELLOW, COLOR_DEFAULT, 0), \
553LINE(DIFF_SIMILARITY, "similarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
554LINE(DIFF_DISSIMILARITY,"dissimilarity ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
555LINE(DIFF_TREE, "diff-tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
6908bdbd 556LINE(PP_AUTHOR, "Author: ", COLOR_CYAN, COLOR_DEFAULT, 0), \
8855ada4 557LINE(PP_COMMIT, "Commit: ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
6908bdbd
JF		 558LINE(PP_MERGE, "Merge: ", COLOR_BLUE, COLOR_DEFAULT, 0), \
559LINE(PP_DATE, "Date: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
8855ada4
JF		 560LINE(PP_ADATE, "AuthorDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
561LINE(PP_CDATE, "CommitDate: ", COLOR_YELLOW, COLOR_DEFAULT, 0), \
7b99a34c 562LINE(PP_REFS, "Refs: ", COLOR_RED, COLOR_DEFAULT, 0), \
a28bcc22
JF		 563LINE(COMMIT, "commit ", COLOR_GREEN, COLOR_DEFAULT, 0), \
564LINE(PARENT, "parent ", COLOR_BLUE, COLOR_DEFAULT, 0), \
565LINE(TREE, "tree ", COLOR_BLUE, COLOR_DEFAULT, 0), \
8855ada4 566LINE(AUTHOR, "author ", COLOR_CYAN, COLOR_DEFAULT, 0), \
a28bcc22 567LINE(COMMITTER, "committer ", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
a28bcc22 568LINE(SIGNOFF, " Signed-off-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
d4d8de8f 569LINE(ACKED, " Acked-by", COLOR_YELLOW, COLOR_DEFAULT, 0), \
a28bcc22
JF		 570LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
571LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
572LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
6b161b31
JF		 573LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
574LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
a28bcc22
JF		 575LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
576LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
577LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
c34d9c9f
JF		 578LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
579LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
660e09ad 580LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
e733ee54
JF		 581LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
582LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
660e09ad 583
78c70acd 584enum line_type {
2e8488b4
JF		 585#define LINE(type, line, fg, bg, attr) \
586 LINE_##type
587 LINE_INFO
588#undef LINE
78c70acd
JF		 589};
590
591struct line_info {
660e09ad
JF		 592 const char *name; /* Option name. */
593 int namelen; /* Size of option name. */
4685845e 594 const char *line; /* The start of line to match. */
2e8488b4
JF		 595 int linelen; /* Size of string to match. */
596 int fg, bg, attr; /* Color and text attributes for the lines. */
78c70acd
JF		 597};
598
2e8488b4 599static struct line_info line_info[] = {
78c70acd 600#define LINE(type, line, fg, bg, attr) \
660e09ad 601 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
2e8488b4
JF		 602 LINE_INFO
603#undef LINE
78c70acd
JF		 604};
605
2e8488b4
JF		 606static enum line_type
607get_line_type(char *line)
78c70acd
JF		 608{
609 int linelen = strlen(line);
a28bcc22 610 enum line_type type;
78c70acd 611
a28bcc22 612 for (type = 0; type < ARRAY_SIZE(line_info); type++)
2e8488b4 613 /* Case insensitive search matches Signed-off-by lines better. */
a28bcc22
JF		 614 if (linelen >= line_info[type].linelen &&
615 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
616 return type;
78c70acd 617
2e8488b4 618 return LINE_DEFAULT;
78c70acd
JF		 619}
620
2e8488b4 621static inline int
78c70acd
JF		 622get_line_attr(enum line_type type)
623{
2e8488b4
JF		 624 assert(type < ARRAY_SIZE(line_info));
625 return COLOR_PAIR(type) | line_info[type].attr;
78c70acd
JF		 626}
627
660e09ad
JF		 628static struct line_info *
629get_line_info(char *name, int namelen)
630{
631 enum line_type type;
660e09ad
JF		 632
633 for (type = 0; type < ARRAY_SIZE(line_info); type++)
634 if (namelen == line_info[type].namelen &&
201f5a18 635 !string_enum_compare(line_info[type].name, name, namelen))
660e09ad
JF		 636 return &line_info[type];
637
638 return NULL;
639}
640
78c70acd
JF		 641static void
642init_colors(void)
643{
82e78006
JF		 644 int default_bg = COLOR_BLACK;
645 int default_fg = COLOR_WHITE;
a28bcc22 646 enum line_type type;
78c70acd
JF		 647
648 start_color();
649
650 if (use_default_colors() != ERR) {
82e78006
JF		 651 default_bg = -1;
652 default_fg = -1;
78c70acd
JF		 653 }
654
a28bcc22
JF		 655 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
656 struct line_info *info = &line_info[type];
82e78006
JF		 657 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
658 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
78c70acd 659
a28bcc22 660 init_pair(type, fg, bg);
78c70acd
JF		 661 }
662}
663
fe7233c3
JF		 664struct line {
665 enum line_type type;
3c571d67
JF		 666
667 /* State flags */
668 unsigned int selected:1;
669
fe7233c3
JF		 670 void *data; /* User data */
671};
672
78c70acd 673
1899507c 674/*
37157fa0
JF		 675 * Keys
676 */
677
93a97d86 678struct keybinding {
37157fa0 679 int alias;
93a97d86 680 enum request request;
04e2b7b2 681 struct keybinding *next;
37157fa0
JF		 682};
683
93a97d86 684static struct keybinding default_keybindings[] = {
37157fa0
JF		 685 /* View switching */
686 { 'm', REQ_VIEW_MAIN },
687 { 'd', REQ_VIEW_DIFF },
688 { 'l', REQ_VIEW_LOG },
e733ee54 689 { 't', REQ_VIEW_TREE },
0001fc34 690 { 'f', REQ_VIEW_BLOB },
37157fa0
JF		 691 { 'p', REQ_VIEW_PAGER },
692 { 'h', REQ_VIEW_HELP },
37157fa0
JF		 693
694 /* View manipulation */
695 { 'q', REQ_VIEW_CLOSE },
696 { KEY_TAB, REQ_VIEW_NEXT },
697 { KEY_RETURN, REQ_ENTER },
698 { KEY_UP, REQ_PREVIOUS },
699 { KEY_DOWN, REQ_NEXT },
700
701 /* Cursor navigation */
702 { 'k', REQ_MOVE_UP },
703 { 'j', REQ_MOVE_DOWN },
704 { KEY_HOME, REQ_MOVE_FIRST_LINE },
705 { KEY_END, REQ_MOVE_LAST_LINE },
706 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
707 { ' ', REQ_MOVE_PAGE_DOWN },
708 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
709 { 'b', REQ_MOVE_PAGE_UP },
710 { '-', REQ_MOVE_PAGE_UP },
711
712 /* Scrolling */
713 { KEY_IC, REQ_SCROLL_LINE_UP },
714 { KEY_DC, REQ_SCROLL_LINE_DOWN },
715 { 'w', REQ_SCROLL_PAGE_UP },
716 { 's', REQ_SCROLL_PAGE_DOWN },
717
4af34daa
JF		 718 /* Searching */
719 { '/', REQ_SEARCH },
720 { '?', REQ_SEARCH_BACK },
721 { 'n', REQ_FIND_NEXT },
722 { 'N', REQ_FIND_PREV },
723
37157fa0
JF		 724 /* Misc */
725 { 'Q', REQ_QUIT },
726 { 'z', REQ_STOP_LOADING },
727 { 'v', REQ_SHOW_VERSION },
728 { 'r', REQ_SCREEN_REDRAW },
904e68d8 729 { '.', REQ_TOGGLE_LINENO },
73fb51d5 730 { 'g', REQ_TOGGLE_REV_GRAPH },
37157fa0
JF		 731 { ':', REQ_PROMPT },
732
733 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
1d754561 734 { ERR, REQ_NONE },
37157fa0 735
1d754561 736 /* Using the ncurses SIGWINCH handler. */
37157fa0
JF		 737 { KEY_RESIZE, REQ_SCREEN_RESIZE },
738};
739
04e2b7b2
JF		 740#define KEYMAP_INFO \
741 KEYMAP_(GENERIC), \
742 KEYMAP_(MAIN), \
743 KEYMAP_(DIFF), \
744 KEYMAP_(LOG), \
e733ee54
JF		 745 KEYMAP_(TREE), \
746 KEYMAP_(BLOB), \
04e2b7b2
JF		 747 KEYMAP_(PAGER), \
748 KEYMAP_(HELP) \
749
750enum keymap {
751#define KEYMAP_(name) KEYMAP_##name
752 KEYMAP_INFO
753#undef KEYMAP_
754};
755
756static struct int_map keymap_table[] = {
757#define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
758 KEYMAP_INFO
759#undef KEYMAP_
760};
761
762#define set_keymap(map, name) \
763 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
764
765static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
766
767static void
768add_keybinding(enum keymap keymap, enum request request, int key)
769{
770 struct keybinding *keybinding;
771
772 keybinding = calloc(1, sizeof(*keybinding));
773 if (!keybinding)
774 die("Failed to allocate keybinding");
775
776 keybinding->alias = key;
777 keybinding->request = request;
778 keybinding->next = keybindings[keymap];
779 keybindings[keymap] = keybinding;
780}
781
782/* Looks for a key binding first in the given map, then in the generic map, and
783 * lastly in the default keybindings. */
37157fa0 784static enum request
04e2b7b2 785get_keybinding(enum keymap keymap, int key)
37157fa0 786{
04e2b7b2 787 struct keybinding *kbd;
37157fa0
JF		 788 int i;
789
04e2b7b2
JF		 790 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
791 if (kbd->alias == key)
792 return kbd->request;
793
794 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
795 if (kbd->alias == key)
796 return kbd->request;
797
93a97d86
JF		 798 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
799 if (default_keybindings[i].alias == key)
800 return default_keybindings[i].request;
37157fa0
JF		 801
802 return (enum request) key;
803}
804
93a97d86 805
37157fa0
JF		 806struct key {
807 char *name;
808 int value;
809};
810
811static struct key key_table[] = {
812 { "Enter", KEY_RETURN },
813 { "Space", ' ' },
814 { "Backspace", KEY_BACKSPACE },
815 { "Tab", KEY_TAB },
816 { "Escape", KEY_ESC },
817 { "Left", KEY_LEFT },
818 { "Right", KEY_RIGHT },
819 { "Up", KEY_UP },
820 { "Down", KEY_DOWN },
821 { "Insert", KEY_IC },
822 { "Delete", KEY_DC },
74f83ee6 823 { "Hash", '#' },
37157fa0
JF		 824 { "Home", KEY_HOME },
825 { "End", KEY_END },
826 { "PageUp", KEY_PPAGE },
827 { "PageDown", KEY_NPAGE },
828 { "F1", KEY_F(1) },
829 { "F2", KEY_F(2) },
830 { "F3", KEY_F(3) },
831 { "F4", KEY_F(4) },
832 { "F5", KEY_F(5) },
833 { "F6", KEY_F(6) },
834 { "F7", KEY_F(7) },
835 { "F8", KEY_F(8) },
836 { "F9", KEY_F(9) },
837 { "F10", KEY_F(10) },
838 { "F11", KEY_F(11) },
839 { "F12", KEY_F(12) },
840};
841
04e2b7b2
JF		 842static int
843get_key_value(const char *name)
844{
845 int i;
846
847 for (i = 0; i < ARRAY_SIZE(key_table); i++)
848 if (!strcasecmp(key_table[i].name, name))
849 return key_table[i].value;
850
851 if (strlen(name) == 1 && isprint(*name))
852 return (int) *name;
853
854 return ERR;
855}
856
37157fa0
JF		 857static char *
858get_key(enum request request)
859{
860 static char buf[BUFSIZ];
861 static char key_char[] = "'X'";
d65ced0d 862 size_t pos = 0;
37157fa0
JF		 863 char *sep = " ";
864 int i;
865
866 buf[pos] = 0;
867
93a97d86
JF		 868 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
869 struct keybinding *keybinding = &default_keybindings[i];
37157fa0
JF		 870 char *seq = NULL;
871 int key;
872
93a97d86 873 if (keybinding->request != request)
37157fa0
JF		 874 continue;
875
876 for (key = 0; key < ARRAY_SIZE(key_table); key++)
93a97d86 877 if (key_table[key].value == keybinding->alias)
37157fa0
JF		 878 seq = key_table[key].name;
879
880 if (seq == NULL &&
93a97d86
JF		 881 keybinding->alias < 127 &&
882 isprint(keybinding->alias)) {
883 key_char[1] = (char) keybinding->alias;
37157fa0
JF		 884 seq = key_char;
885 }
886
887 if (!seq)
888 seq = "'?'";
889
890 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
891 return "Too many keybindings!";
892 sep = ", ";
893 }
894
895 return buf;
896}
897
898
899/*
1899507c
JF		 900 * User config file handling.
901 */
902
5dc795f2
JF		 903static struct int_map color_map[] = {
904#define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
905 COLOR_MAP(DEFAULT),
906 COLOR_MAP(BLACK),
907 COLOR_MAP(BLUE),
908 COLOR_MAP(CYAN),
909 COLOR_MAP(GREEN),
910 COLOR_MAP(MAGENTA),
911 COLOR_MAP(RED),
912 COLOR_MAP(WHITE),
913 COLOR_MAP(YELLOW),
914};
915
9256ab05
JF		 916#define set_color(color, name) \
917 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
660e09ad 918
5dc795f2
JF		 919static struct int_map attr_map[] = {
920#define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
921 ATTR_MAP(NORMAL),
922 ATTR_MAP(BLINK),
923 ATTR_MAP(BOLD),
924 ATTR_MAP(DIM),
925 ATTR_MAP(REVERSE),
926 ATTR_MAP(STANDOUT),
927 ATTR_MAP(UNDERLINE),
928};
929
9256ab05
JF		 930#define set_attribute(attr, name) \
931 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
660e09ad 932
3c3801c2
JF		 933static int config_lineno;
934static bool config_errors;
935static char *config_msg;
936
5bfd96c7 937/* Wants: object fgcolor bgcolor [attr] */
660e09ad 938static int
5bfd96c7 939option_color_command(int argc, char *argv[])
660e09ad 940{
bca8fcaa
JF		 941 struct line_info *info;
942
9256ab05
JF		 943 if (argc != 3 && argc != 4) {
944 config_msg = "Wrong number of arguments given to color command";
945 return ERR;
946 }
947
948 info = get_line_info(argv[0], strlen(argv[0]));
bca8fcaa
JF		 949 if (!info) {
950 config_msg = "Unknown color name";
951 return ERR;
952 }
660e09ad 953
a3653368
JF		 954 if (set_color(&info->fg, argv[1]) == ERR ||
955 set_color(&info->bg, argv[2]) == ERR) {
bca8fcaa
JF		 956 config_msg = "Unknown color";
957 return ERR;
958 }
660e09ad 959
9256ab05 960 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
bca8fcaa
JF		 961 config_msg = "Unknown attribute";
962 return ERR;
660e09ad
JF		 963 }
964
bca8fcaa
JF		 965 return OK;
966}
967
5bfd96c7
JF		 968/* Wants: name = value */
969static int
970option_set_command(int argc, char *argv[])
971{
972 if (argc != 3) {
973 config_msg = "Wrong number of arguments given to set command";
974 return ERR;
975 }
976
977 if (strcmp(argv[1], "=")) {
978 config_msg = "No value assigned";
979 return ERR;
980 }
981
982 if (!strcmp(argv[0], "show-rev-graph")) {
983 opt_rev_graph = (!strcmp(argv[2], "1") ||
984 !strcmp(argv[2], "true") ||
985 !strcmp(argv[2], "yes"));
986 return OK;
987 }
988
989 if (!strcmp(argv[0], "line-number-interval")) {
990 opt_num_interval = atoi(argv[2]);
991 return OK;
992 }
993
994 if (!strcmp(argv[0], "tab-size")) {
995 opt_tab_size = atoi(argv[2]);
996 return OK;
997 }
998
cb7267ee 999 if (!strcmp(argv[0], "commit-encoding")) {
3cc9a4d4
JF		 1000 char *arg = argv[2];
1001 int delimiter = *arg;
1002 int i;
1003
1004 switch (delimiter) {
1005 case '"':
1006 case '\'':
1007 for (arg++, i = 0; arg[i]; i++)
1008 if (arg[i] == delimiter) {
1009 arg[i] = 0;
1010 break;
1011 }
1012 default:
1013 string_copy(opt_encoding, arg);
1014 return OK;
1015 }
5bfd96c7
JF		 1016 }
1017
a3653368 1018 config_msg = "Unknown variable name";
5bfd96c7
JF		 1019 return ERR;
1020}
1021
04e2b7b2
JF		 1022/* Wants: mode request key */
1023static int
1024option_bind_command(int argc, char *argv[])
1025{
1026 enum request request;
1027 int keymap;
1028 int key;
1029
1030 if (argc != 3) {
1031 config_msg = "Wrong number of arguments given to bind command";
1032 return ERR;
1033 }
1034
1035 if (set_keymap(&keymap, argv[0]) == ERR) {
1036 config_msg = "Unknown key map";
1037 return ERR;
1038 }
1039
1040 key = get_key_value(argv[1]);
1041 if (key == ERR) {
1042 config_msg = "Unknown key";
1043 return ERR;
1044 }
1045
1046 request = get_request(argv[2]);
1047 if (request == REQ_UNKNOWN) {
1048 config_msg = "Unknown request name";
1049 return ERR;
1050 }
1051
1052 add_keybinding(keymap, request, key);
1053
1054 return OK;
1055}
1056
bca8fcaa 1057static int
9256ab05 1058set_option(char *opt, char *value)
bca8fcaa 1059{
9256ab05
JF		 1060 char *argv[16];
1061 int valuelen;
1062 int argc = 0;
1063
1064 /* Tokenize */
1065 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1066 argv[argc++] = value;
1067
1068 value += valuelen;
1069 if (!*value)
1070 break;
1071
1072 *value++ = 0;
1073 while (isspace(*value))
1074 value++;
1075 }
1076
1077 if (!strcmp(opt, "color"))
5bfd96c7
JF		 1078 return option_color_command(argc, argv);
1079
1080 if (!strcmp(opt, "set"))
1081 return option_set_command(argc, argv);
bca8fcaa 1082
04e2b7b2
JF		 1083 if (!strcmp(opt, "bind"))
1084 return option_bind_command(argc, argv);
1085
a3653368 1086 config_msg = "Unknown option command";
660e09ad
JF		 1087 return ERR;
1088}
1089
1090static int
3c3801c2
JF		 1091read_option(char *opt, int optlen, char *value, int valuelen)
1092{
a3653368
JF		 1093 int status = OK;
1094
3c3801c2
JF		 1095 config_lineno++;
1096 config_msg = "Internal error";
1097
a3653368
JF		 1098 /* Check for comment markers, since read_properties() will
1099 * only ensure opt and value are split at first " \t". */
74f83ee6 1100 optlen = strcspn(opt, "#");
a3653368 1101 if (optlen == 0)
3c3801c2
JF		 1102 return OK;
1103
a3653368
JF		 1104 if (opt[optlen] != 0) {
1105 config_msg = "No option value";
1106 status = ERR;
1107
1108 } else {
1109 /* Look for comment endings in the value. */
74f83ee6 1110 int len = strcspn(value, "#");
a3653368
JF		 1111
1112 if (len < valuelen) {
1113 valuelen = len;
1114 value[valuelen] = 0;
1115 }
1116
1117 status = set_option(opt, value);
3c3801c2
JF		 1118 }
1119
a3653368
JF		 1120 if (status == ERR) {
1121 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
3c3801c2
JF		 1122 config_lineno, optlen, opt, config_msg);
1123 config_errors = TRUE;
1124 }
1125
1126 /* Always keep going if errors are encountered. */
1127 return OK;
1128}
1129
1130static int
660e09ad
JF		 1131load_options(void)
1132{
1133 char *home = getenv("HOME");
17482b11 1134 char buf[SIZEOF_STR];
660e09ad
JF		 1135 FILE *file;
1136
3c3801c2
JF		 1137 config_lineno = 0;
1138 config_errors = FALSE;
1139
cc2d1364 1140 if (!home || !string_format(buf, "%s/.tigrc", home))
660e09ad
JF		 1141 return ERR;
1142
1143 /* It's ok that the file doesn't exist. */
1144 file = fopen(buf, "r");
1145 if (!file)
1146 return OK;
1147
3c3801c2
JF		 1148 if (read_properties(file, " \t", read_option) == ERR ||
1149 config_errors == TRUE)
1150 fprintf(stderr, "Errors while loading %s.\n", buf);
1151
1152 return OK;
660e09ad
JF		 1153}
1154
1155
d839253b 1156/*
468876c9 1157 * The viewer
d839253b 1158 */
c2124ccd
JF		 1159
1160struct view;
fe7233c3 1161struct view_ops;
c2124ccd
JF		 1162
1163/* The display array of active views and the index of the current view. */
1164static struct view *display[2];
1165static unsigned int current_view;
1166
33c4f9ea 1167#define foreach_displayed_view(view, i) \
c2124ccd
JF		 1168 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1169
9f41488f 1170#define displayed_views() (display[1] != NULL ? 2 : 1)
c2124ccd 1171
d839253b 1172/* Current head and commit ID */
e733ee54 1173static char ref_blob[SIZEOF_REF] = "";
c2124ccd
JF		 1174static char ref_commit[SIZEOF_REF] = "HEAD";
1175static char ref_head[SIZEOF_REF] = "HEAD";
1176
b801d8b2 1177struct view {
03a93dbb 1178 const char *name; /* View name */
4685845e
TH		 1179 const char *cmd_fmt; /* Default command line format */
1180 const char *cmd_env; /* Command line set via environment */
e733ee54 1181 const char *id; /* Points to either of ref_{head,commit,blob} */
6b161b31 1182
fe7233c3 1183 struct view_ops *ops; /* View operations */
22f66b0a 1184
04e2b7b2
JF		 1185 enum keymap keymap; /* What keymap does this view have */
1186
17482b11 1187 char cmd[SIZEOF_STR]; /* Command buffer */
49f2b43f
JF		 1188 char ref[SIZEOF_REF]; /* Hovered commit reference */
1189 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
2e8488b4 1190
8855ada4
JF		 1191 int height, width; /* The width and height of the main window */
1192 WINDOW *win; /* The main window */
1193 WINDOW *title; /* The title window living below the main window */
b801d8b2
JF		 1194
1195 /* Navigation */
1196 unsigned long offset; /* Offset of the window top */
1197 unsigned long lineno; /* Current line number */
1198
4af34daa
JF		 1199 /* Searching */
1200 char grep[SIZEOF_STR]; /* Search string */
b77b2cb8 1201 regex_t *regex; /* Pre-compiled regex */
4af34daa 1202
f6da0b66
JF		 1203 /* If non-NULL, points to the view that opened this view. If this view
1204 * is closed tig will switch back to the parent view. */
1205 struct view *parent;
1206
b801d8b2
JF		 1207 /* Buffering */
1208 unsigned long lines; /* Total number of lines */
fe7233c3 1209 struct line *line; /* Line index */
e2c01617 1210 unsigned long line_size;/* Total number of allocated lines */
8855ada4 1211 unsigned int digits; /* Number of digits in the lines member. */
b801d8b2
JF		 1212
1213 /* Loading */
1214 FILE *pipe;
2e8488b4 1215 time_t start_time;
b801d8b2
JF		 1216};
1217
fe7233c3
JF		 1218struct view_ops {
1219 /* What type of content being displayed. Used in the title bar. */
1220 const char *type;
1221 /* Draw one line; @lineno must be < view->height. */
5dcf8064 1222 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
fe7233c3 1223 /* Read one line; updates view->line. */
701e4f5d 1224 bool (*read)(struct view *view, char *data);
fe7233c3
JF		 1225 /* Depending on view, change display based on current line. */
1226 bool (*enter)(struct view *view, struct line *line);
4af34daa
JF		 1227 /* Search for regex in a line. */
1228 bool (*grep)(struct view *view, struct line *line);
d720de4b
JF		 1229 /* Select line */
1230 void (*select)(struct view *view, struct line *line);
fe7233c3
JF		 1231};
1232
6b161b31
JF		 1233static struct view_ops pager_ops;
1234static struct view_ops main_ops;
e733ee54
JF		 1235static struct view_ops tree_ops;
1236static struct view_ops blob_ops;
a28bcc22 1237
04e2b7b2
JF		 1238#define VIEW_STR(name, cmd, env, ref, ops, map) \
1239 { name, cmd, #env, ref, ops, map}
1ba2ae4b 1240
95d7ddcd 1241#define VIEW_(id, name, ops, ref) \
04e2b7b2 1242 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1ba2ae4b 1243
c2124ccd 1244
b801d8b2 1245static struct view views[] = {
95d7ddcd
JF		 1246 VIEW_(MAIN, "main", &main_ops, ref_head),
1247 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1248 VIEW_(LOG, "log", &pager_ops, ref_head),
e733ee54
JF		 1249 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1250 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
95d7ddcd
JF		 1251 VIEW_(HELP, "help", &pager_ops, "static"),
1252 VIEW_(PAGER, "pager", &pager_ops, "static"),
b801d8b2
JF		 1253};
1254
a28bcc22
JF		 1255#define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1256
699ae55b
JF		 1257#define foreach_view(view, i) \
1258 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1259
1260#define view_is_displayed(view) \
1261 (view == display[0] || view == display[1])
4c6fabc2 1262
fe7233c3
JF		 1263static bool
1264draw_view_line(struct view *view, unsigned int lineno)
1265{
d720de4b 1266 struct line *line;
5dcf8064 1267 bool selected = (view->offset + lineno == view->lineno);
4887d44e 1268 bool draw_ok;
d720de4b 1269
699ae55b
JF		 1270 assert(view_is_displayed(view));
1271
fe7233c3
JF		 1272 if (view->offset + lineno >= view->lines)
1273 return FALSE;
1274
d720de4b
JF		 1275 line = &view->line[view->offset + lineno];
1276
3c571d67
JF		 1277 if (selected) {
1278 line->selected = TRUE;
d720de4b 1279 view->ops->select(view, line);
3c571d67
JF		 1280 } else if (line->selected) {
1281 line->selected = FALSE;
1282 wmove(view->win, lineno, 0);
1283 wclrtoeol(view->win);
1284 }
d720de4b 1285
4887d44e
JF		 1286 scrollok(view->win, FALSE);
1287 draw_ok = view->ops->draw(view, line, lineno, selected);
1288 scrollok(view->win, TRUE);
1289
1290 return draw_ok;
fe7233c3
JF		 1291}
1292
b801d8b2 1293static void
82e78006 1294redraw_view_from(struct view *view, int lineno)
b801d8b2 1295{
82e78006 1296 assert(0 <= lineno && lineno < view->height);
b801d8b2 1297
82e78006 1298 for (; lineno < view->height; lineno++) {
fe7233c3 1299 if (!draw_view_line(view, lineno))
fd85fef1 1300 break;
b801d8b2
JF		 1301 }
1302
1303 redrawwin(view->win);
1304 wrefresh(view->win);
1305}
1306
b76c2afc 1307static void
82e78006
JF		 1308redraw_view(struct view *view)
1309{
1310 wclear(view->win);
1311 redraw_view_from(view, 0);
1312}
1313
c2124ccd 1314
6b161b31 1315static void
81030ec8
JF		 1316update_view_title(struct view *view)
1317{
3c112a88
JF		 1318 char buf[SIZEOF_STR];
1319 size_t bufpos = 0;
81030ec8 1320
3c112a88 1321 assert(view_is_displayed(view));
81030ec8 1322
3c112a88 1323 string_format_from(buf, &bufpos, "[%s]", view->name);
81030ec8 1324 if (*view->ref)
3c112a88 1325 string_format_from(buf, &bufpos, " %s", view->ref);
81030ec8 1326
c19f8017 1327 if (view->lines || view->pipe) {
6d9c07af 1328 unsigned int view_lines = view->offset + view->height;
c19f8017 1329 unsigned int lines = view->lines
6d9c07af 1330 ? MIN(view_lines, view->lines) * 100 / view->lines
c19f8017
JF		 1331 : 0;
1332
3c112a88
JF		 1333 string_format_from(buf, &bufpos, " - %s %d of %d (%d%%)",
1334 view->ops->type,
1335 view->lineno + 1,
1336 view->lines,
1337 lines);
81030ec8
JF		 1338 }
1339
f97f4012
JF		 1340 if (view->pipe) {
1341 time_t secs = time(NULL) - view->start_time;
1342
1343 /* Three git seconds are a long time ... */
1344 if (secs > 2)
3c112a88 1345 string_format_from(buf, &bufpos, " %lds", secs);
f97f4012
JF		 1346 }
1347
3c112a88
JF		 1348 if (view == display[current_view])
1349 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1350 else
1351 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1352
1353 werase(view->title);
1354 mvwaddnstr(view->title, 0, 0, buf, bufpos);
976447f8 1355 wmove(view->title, 0, view->width - 1);
81030ec8
JF		 1356 wrefresh(view->title);
1357}
1358
1359static void
6b161b31 1360resize_display(void)
b76c2afc 1361{
03a93dbb 1362 int offset, i;
6b161b31
JF		 1363 struct view *base = display[0];
1364 struct view *view = display[1] ? display[1] : display[0];
b76c2afc 1365
6b161b31 1366 /* Setup window dimensions */
b76c2afc 1367
03a93dbb 1368 getmaxyx(stdscr, base->height, base->width);
b76c2afc 1369
6b161b31 1370 /* Make room for the status window. */
03a93dbb 1371 base->height -= 1;
6b161b31
JF		 1372
1373 if (view != base) {
03a93dbb
JF		 1374 /* Horizontal split. */
1375 view->width = base->width;
6b161b31
JF		 1376 view->height = SCALE_SPLIT_VIEW(base->height);
1377 base->height -= view->height;
1378
1379 /* Make room for the title bar. */
1380 view->height -= 1;
1381 }
1382
1383 /* Make room for the title bar. */
1384 base->height -= 1;
1385
1386 offset = 0;
1387
33c4f9ea 1388 foreach_displayed_view (view, i) {
b76c2afc 1389 if (!view->win) {
c19f8017 1390 view->win = newwin(view->height, 0, offset, 0);
6b161b31
JF		 1391 if (!view->win)
1392 die("Failed to create %s view", view->name);
1393
1394 scrollok(view->win, TRUE);
1395
1396 view->title = newwin(1, 0, offset + view->height, 0);
1397 if (!view->title)
1398 die("Failed to create title window");
1399
1400 } else {
c19f8017 1401 wresize(view->win, view->height, view->width);
6b161b31
JF		 1402 mvwin(view->win, offset, 0);
1403 mvwin(view->title, offset + view->height, 0);
a28bcc22 1404 }
a28bcc22 1405
6b161b31 1406 offset += view->height + 1;
b76c2afc 1407 }
6b161b31 1408}
b76c2afc 1409
6b161b31 1410static void
20bb5e18
JF		 1411redraw_display(void)
1412{
1413 struct view *view;
1414 int i;
1415
33c4f9ea 1416 foreach_displayed_view (view, i) {
20bb5e18
JF		 1417 redraw_view(view);
1418 update_view_title(view);
1419 }
1420}
1421
85af6284 1422static void
2bee3bde 1423update_display_cursor(struct view *view)
85af6284 1424{
85af6284
JF		 1425 /* Move the cursor to the right-most column of the cursor line.
1426 *
1427 * XXX: This could turn out to be a bit expensive, but it ensures that
1428 * the cursor does not jump around. */
1429 if (view->lines) {
1430 wmove(view->win, view->lineno - view->offset, view->width - 1);
1431 wrefresh(view->win);
1432 }
1433}
20bb5e18 1434
2e8488b4
JF		 1435/*
1436 * Navigation
1437 */
1438
4a2909a7 1439/* Scrolling backend */
b801d8b2 1440static void
8c317212 1441do_scroll_view(struct view *view, int lines)
b801d8b2 1442{
a0087dd5
JF		 1443 bool redraw_current_line = FALSE;
1444
fd85fef1
JF		 1445 /* The rendering expects the new offset. */
1446 view->offset += lines;
1447
1448 assert(0 <= view->offset && view->offset < view->lines);
1449 assert(lines);
b801d8b2 1450
a0087dd5
JF		 1451 /* Move current line into the view. */
1452 if (view->lineno < view->offset) {
1453 view->lineno = view->offset;
1454 redraw_current_line = TRUE;
1455 } else if (view->lineno >= view->offset + view->height) {
1456 view->lineno = view->offset + view->height - 1;
1457 redraw_current_line = TRUE;
1458 }
1459
1460 assert(view->offset <= view->lineno && view->lineno < view->lines);
1461
82e78006 1462 /* Redraw the whole screen if scrolling is pointless. */
4c6fabc2 1463 if (view->height < ABS(lines)) {
b76c2afc
JF		 1464 redraw_view(view);
1465
1466 } else {
22f66b0a 1467 int line = lines > 0 ? view->height - lines : 0;
82e78006 1468 int end = line + ABS(lines);
fd85fef1
JF		 1469
1470 wscrl(view->win, lines);
1471
22f66b0a 1472 for (; line < end; line++) {
fe7233c3 1473 if (!draw_view_line(view, line))
fd85fef1
JF		 1474 break;
1475 }
fd85fef1 1476
a0087dd5
JF		 1477 if (redraw_current_line)
1478 draw_view_line(view, view->lineno - view->offset);
fd85fef1
JF		 1479 }
1480
fd85fef1
JF		 1481 redrawwin(view->win);
1482 wrefresh(view->win);
9d3f5834 1483 report("");
fd85fef1 1484}
78c70acd 1485
4a2909a7 1486/* Scroll frontend */
fd85fef1 1487static void
6b161b31 1488scroll_view(struct view *view, enum request request)
fd85fef1
JF		 1489{
1490 int lines = 1;
b801d8b2 1491
8c317212
JF		 1492 assert(view_is_displayed(view));
1493
b801d8b2 1494 switch (request) {
4a2909a7 1495 case REQ_SCROLL_PAGE_DOWN:
fd85fef1 1496 lines = view->height;
4a2909a7 1497 case REQ_SCROLL_LINE_DOWN:
b801d8b2 1498 if (view->offset + lines > view->lines)
bde3653a 1499 lines = view->lines - view->offset;
b801d8b2 1500
fd85fef1 1501 if (lines == 0 || view->offset + view->height >= view->lines) {
eb98559e 1502 report("Cannot scroll beyond the last line");
b801d8b2
JF		 1503 return;
1504 }
1505 break;
1506
4a2909a7 1507 case REQ_SCROLL_PAGE_UP:
fd85fef1 1508 lines = view->height;
4a2909a7 1509 case REQ_SCROLL_LINE_UP:
b801d8b2
JF		 1510 if (lines > view->offset)
1511 lines = view->offset;
1512
1513 if (lines == 0) {
eb98559e 1514 report("Cannot scroll beyond the first line");
b801d8b2
JF		 1515 return;
1516 }
1517
fd85fef1 1518 lines = -lines;
b801d8b2 1519 break;
03a93dbb 1520
6b161b31
JF		 1521 default:
1522 die("request %d not handled in switch", request);
b801d8b2
JF		 1523 }
1524
8c317212 1525 do_scroll_view(view, lines);
fd85fef1 1526}
b801d8b2 1527
4a2909a7 1528/* Cursor moving */
fd85fef1 1529static void
8522ecc7 1530move_view(struct view *view, enum request request)
fd85fef1 1531{
dfaa6c81 1532 int scroll_steps = 0;
fd85fef1 1533 int steps;
b801d8b2 1534
fd85fef1 1535 switch (request) {
4a2909a7 1536 case REQ_MOVE_FIRST_LINE:
78c70acd
JF		 1537 steps = -view->lineno;
1538 break;
1539
4a2909a7 1540 case REQ_MOVE_LAST_LINE:
78c70acd
JF		 1541 steps = view->lines - view->lineno - 1;
1542 break;
1543
4a2909a7 1544 case REQ_MOVE_PAGE_UP:
78c70acd
JF		 1545 steps = view->height > view->lineno
1546 ? -view->lineno : -view->height;
1547 break;
1548
4a2909a7 1549 case REQ_MOVE_PAGE_DOWN:
78c70acd
JF		 1550 steps = view->lineno + view->height >= view->lines
1551 ? view->lines - view->lineno - 1 : view->height;
1552 break;
1553
4a2909a7 1554 case REQ_MOVE_UP:
fd85fef1
JF		 1555 steps = -1;
1556 break;
b801d8b2 1557
4a2909a7 1558 case REQ_MOVE_DOWN:
fd85fef1
JF		 1559 steps = 1;
1560 break;
6b161b31
JF		 1561
1562 default:
1563 die("request %d not handled in switch", request);
78c70acd 1564 }
b801d8b2 1565
4c6fabc2 1566 if (steps <= 0 && view->lineno == 0) {
eb98559e 1567 report("Cannot move beyond the first line");
78c70acd 1568 return;
b801d8b2 1569
6908bdbd 1570 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
eb98559e 1571 report("Cannot move beyond the last line");
78c70acd 1572 return;
fd85fef1
JF		 1573 }
1574
4c6fabc2 1575 /* Move the current line */
fd85fef1 1576 view->lineno += steps;
4c6fabc2
JF		 1577 assert(0 <= view->lineno && view->lineno < view->lines);
1578
4c6fabc2 1579 /* Check whether the view needs to be scrolled */
fd85fef1
JF		 1580 if (view->lineno < view->offset ||
1581 view->lineno >= view->offset + view->height) {
dfaa6c81 1582 scroll_steps = steps;
fd85fef1 1583 if (steps < 0 && -steps > view->offset) {
dfaa6c81 1584 scroll_steps = -view->offset;
b76c2afc
JF		 1585
1586 } else if (steps > 0) {
1587 if (view->lineno == view->lines - 1 &&
1588 view->lines > view->height) {
dfaa6c81
JF		 1589 scroll_steps = view->lines - view->offset - 1;
1590 if (scroll_steps >= view->height)
1591 scroll_steps -= view->height - 1;
b76c2afc 1592 }
b801d8b2 1593 }
8522ecc7
JF		 1594 }
1595
1596 if (!view_is_displayed(view)) {
1597 view->offset += steps;
1598 view->ops->select(view, &view->line[view->lineno]);
1599 return;
1600 }
1601
1602 /* Repaint the old "current" line if we be scrolling */
1603 if (ABS(steps) < view->height)
1604 draw_view_line(view, view->lineno - steps - view->offset);
1605
dfaa6c81
JF		 1606 if (scroll_steps) {
1607 do_scroll_view(view, scroll_steps);
fd85fef1 1608 return;
b801d8b2
JF		 1609 }
1610
4c6fabc2 1611 /* Draw the current line */
fe7233c3 1612 draw_view_line(view, view->lineno - view->offset);
fd85fef1 1613
b801d8b2
JF		 1614 redrawwin(view->win);
1615 wrefresh(view->win);
9d3f5834 1616 report("");
b801d8b2
JF		 1617}
1618
b801d8b2 1619
2e8488b4 1620/*
4af34daa
JF		 1621 * Searching
1622 */
1623
c02d8fce 1624static void search_view(struct view *view, enum request request);
4af34daa
JF		 1625
1626static bool
1627find_next_line(struct view *view, unsigned long lineno, struct line *line)
1628{
699ae55b
JF		 1629 assert(view_is_displayed(view));
1630
4af34daa
JF		 1631 if (!view->ops->grep(view, line))
1632 return FALSE;
1633
1634 if (lineno - view->offset >= view->height) {
1635 view->offset = lineno;
1636 view->lineno = lineno;
1637 redraw_view(view);
1638
1639 } else {
1640 unsigned long old_lineno = view->lineno - view->offset;
1641
1642 view->lineno = lineno;
4af34daa
JF		 1643 draw_view_line(view, old_lineno);
1644
1645 draw_view_line(view, view->lineno - view->offset);
1646 redrawwin(view->win);
1647 wrefresh(view->win);
1648 }
1649
1650 report("Line %ld matches '%s'", lineno + 1, view->grep);
1651 return TRUE;
1652}
1653
1654static void
1655find_next(struct view *view, enum request request)
1656{
1657 unsigned long lineno = view->lineno;
1658 int direction;
1659
1660 if (!*view->grep) {
1661 if (!*opt_search)
1662 report("No previous search");
1663 else
c02d8fce 1664 search_view(view, request);
4af34daa
JF		 1665 return;
1666 }
1667
1668 switch (request) {
1669 case REQ_SEARCH:
1670 case REQ_FIND_NEXT:
1671 direction = 1;
1672 break;
1673
1674 case REQ_SEARCH_BACK:
1675 case REQ_FIND_PREV:
1676 direction = -1;
1677 break;
1678
1679 default:
1680 return;
1681 }
1682
1683 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1684 lineno += direction;
1685
1686 /* Note, lineno is unsigned long so will wrap around in which case it
1687 * will become bigger than view->lines. */
1688 for (; lineno < view->lines; lineno += direction) {
1689 struct line *line = &view->line[lineno];
1690
1691 if (find_next_line(view, lineno, line))
1692 return;
1693 }
1694
1695 report("No match found for '%s'", view->grep);
1696}
1697
1698static void
c02d8fce 1699search_view(struct view *view, enum request request)
4af34daa
JF		 1700{
1701 int regex_err;
1702
b77b2cb8
JF		 1703 if (view->regex) {
1704 regfree(view->regex);
4af34daa 1705 *view->grep = 0;
b77b2cb8
JF		 1706 } else {
1707 view->regex = calloc(1, sizeof(*view->regex));
1708 if (!view->regex)
1709 return;
4af34daa
JF		 1710 }
1711
c02d8fce 1712 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
4af34daa
JF		 1713 if (regex_err != 0) {
1714 char buf[SIZEOF_STR] = "unknown error";
1715
b77b2cb8 1716 regerror(regex_err, view->regex, buf, sizeof(buf));
e9cacd58 1717 report("Search failed: %s", buf);
4af34daa
JF		 1718 return;
1719 }
1720
c02d8fce 1721 string_copy(view->grep, opt_search);
4af34daa
JF		 1722
1723 find_next(view, request);
1724}
1725
1726/*
2e8488b4
JF		 1727 * Incremental updating
1728 */
b801d8b2 1729
199d1288
JF		 1730static void
1731end_update(struct view *view)
1732{
1733 if (!view->pipe)
1734 return;
1735 set_nonblocking_input(FALSE);
1736 if (view->pipe == stdin)
1737 fclose(view->pipe);
1738 else
1739 pclose(view->pipe);
1740 view->pipe = NULL;
1741}
1742
03a93dbb 1743static bool
b801d8b2
JF		 1744begin_update(struct view *view)
1745{
4685845e 1746 const char *id = view->id;
fd85fef1 1747
199d1288
JF		 1748 if (view->pipe)
1749 end_update(view);
1750
03a93dbb
JF		 1751 if (opt_cmd[0]) {
1752 string_copy(view->cmd, opt_cmd);
1753 opt_cmd[0] = 0;
8855ada4
JF		 1754 /* When running random commands, the view ref could have become
1755 * invalid so clear it. */
1756 view->ref[0] = 0;
e733ee54
JF		 1757
1758 } else if (view == VIEW(REQ_VIEW_TREE)) {
1759 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1760
1761 if (strcmp(view->vid, view->id))
1762 opt_path[0] = 0;
1763
4ea4ce91 1764 if (!string_format(view->cmd, format, id, opt_path))
e733ee54
JF		 1765 return FALSE;
1766
03a93dbb 1767 } else {
4685845e 1768 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1ba2ae4b 1769
cc2d1364 1770 if (!string_format(view->cmd, format, id, id, id, id, id))
03a93dbb
JF		 1771 return FALSE;
1772 }
b801d8b2 1773
6908bdbd
JF		 1774 /* Special case for the pager view. */
1775 if (opt_pipe) {
1776 view->pipe = opt_pipe;
1777 opt_pipe = NULL;
1778 } else {
1779 view->pipe = popen(view->cmd, "r");
1780 }
1781
2e8488b4
JF		 1782 if (!view->pipe)
1783 return FALSE;
b801d8b2 1784
6b161b31 1785 set_nonblocking_input(TRUE);
b801d8b2
JF		 1786
1787 view->offset = 0;
1788 view->lines = 0;
1789 view->lineno = 0;
49f2b43f 1790 string_copy(view->vid, id);
b801d8b2 1791
2e8488b4
JF		 1792 if (view->line) {
1793 int i;
1794
1795 for (i = 0; i < view->lines; i++)
fe7233c3
JF		 1796 if (view->line[i].data)
1797 free(view->line[i].data);
2e8488b4
JF		 1798
1799 free(view->line);
1800 view->line = NULL;
1801 }
1802
1803 view->start_time = time(NULL);
1804
b801d8b2
JF		 1805 return TRUE;
1806}
1807
e2c01617
JF		 1808static struct line *
1809realloc_lines(struct view *view, size_t line_size)
1810{
1811 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1812
1813 if (!tmp)
1814 return NULL;
1815
1816 view->line = tmp;
1817 view->line_size = line_size;
1818 return view->line;
1819}
1820
03a93dbb 1821static bool
b801d8b2
JF		 1822update_view(struct view *view)
1823{
6b68fd24
JF		 1824 char in_buffer[BUFSIZ];
1825 char out_buffer[BUFSIZ * 2];
b801d8b2 1826 char *line;
82e78006
JF		 1827 /* The number of lines to read. If too low it will cause too much
1828 * redrawing (and possible flickering), if too high responsiveness
1829 * will suffer. */
8855ada4 1830 unsigned long lines = view->height;
82e78006 1831 int redraw_from = -1;
b801d8b2
JF		 1832
1833 if (!view->pipe)
1834 return TRUE;
1835
82e78006
JF		 1836 /* Only redraw if lines are visible. */
1837 if (view->offset + view->height >= view->lines)
1838 redraw_from = view->lines - view->offset;
b801d8b2 1839
699ae55b 1840 /* FIXME: This is probably not perfect for backgrounded views. */
e2c01617 1841 if (!realloc_lines(view, view->lines + lines))
b801d8b2
JF		 1842 goto alloc_error;
1843
6b68fd24
JF		 1844 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1845 size_t linelen = strlen(line);
b801d8b2 1846
b801d8b2
JF		 1847 if (linelen)
1848 line[linelen - 1] = 0;
1849
6b68fd24
JF		 1850 if (opt_iconv != ICONV_NONE) {
1851 char *inbuf = line;
1852 size_t inlen = linelen;
1853
1854 char *outbuf = out_buffer;
1855 size_t outlen = sizeof(out_buffer);
1856
1857 size_t ret;
1858
1859 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1860 if (ret != (size_t) -1) {
1861 line = out_buffer;
1862 linelen = strlen(out_buffer);
1863 }
1864 }
1865
701e4f5d 1866 if (!view->ops->read(view, line))
b801d8b2 1867 goto alloc_error;
fd85fef1
JF		 1868
1869 if (lines-- == 1)
1870 break;
b801d8b2
JF		 1871 }
1872
8855ada4
JF		 1873 {
1874 int digits;
1875
1876 lines = view->lines;
1877 for (digits = 0; lines; digits++)
1878 lines /= 10;
1879
1880 /* Keep the displayed view in sync with line number scaling. */
1881 if (digits != view->digits) {
1882 view->digits = digits;
1883 redraw_from = 0;
1884 }
1885 }
1886
699ae55b
JF		 1887 if (!view_is_displayed(view))
1888 goto check_pipe;
1889
e733ee54
JF		 1890 if (view == VIEW(REQ_VIEW_TREE)) {
1891 /* Clear the view and redraw everything since the tree sorting
1892 * might have rearranged things. */
1893 redraw_view(view);
1894
1895 } else if (redraw_from >= 0) {
82e78006 1896 /* If this is an incremental update, redraw the previous line
a28bcc22
JF		 1897 * since for commits some members could have changed when
1898 * loading the main view. */
82e78006
JF		 1899 if (redraw_from > 0)
1900 redraw_from--;
1901
1902 /* Incrementally draw avoids flickering. */
1903 redraw_view_from(view, redraw_from);
4c6fabc2 1904 }
b801d8b2 1905
eb98559e
JF		 1906 /* Update the title _after_ the redraw so that if the redraw picks up a
1907 * commit reference in view->ref it'll be available here. */
1908 update_view_title(view);
1909
699ae55b 1910check_pipe:
b801d8b2 1911 if (ferror(view->pipe)) {
03a93dbb 1912 report("Failed to read: %s", strerror(errno));
b801d8b2
JF		 1913 goto end;
1914
1915 } else if (feof(view->pipe)) {
f97f4012 1916 report("");
b801d8b2
JF		 1917 goto end;
1918 }
1919
1920 return TRUE;
1921
1922alloc_error:
2e8488b4 1923 report("Allocation failure");
b801d8b2
JF		 1924
1925end:
1926 end_update(view);
1927 return FALSE;
1928}
1929
79d445ca 1930
e10154d5
JF		 1931/*
1932 * View opening
1933 */
1934
79d445ca
JF		 1935static void open_help_view(struct view *view)
1936{
1937 char buf[BUFSIZ];
1938 int lines = ARRAY_SIZE(req_info) + 2;
1939 int i;
1940
1941 if (view->lines > 0)
1942 return;
1943
1944 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1945 if (!req_info[i].request)
1946 lines++;
1947
1948 view->line = calloc(lines, sizeof(*view->line));
1949 if (!view->line) {
1950 report("Allocation failure");
1951 return;
1952 }
1953
1954 view->ops->read(view, "Quick reference for tig keybindings:");
1955
1956 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1957 char *key;
1958
1959 if (!req_info[i].request) {
1960 view->ops->read(view, "");
1961 view->ops->read(view, req_info[i].help);
1962 continue;
1963 }
1964
1965 key = get_key(req_info[i].request);
1966 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1967 continue;
1968
1969 view->ops->read(view, buf);
1970 }
1971}
1972
49f2b43f
JF		 1973enum open_flags {
1974 OPEN_DEFAULT = 0, /* Use default view switching. */
1975 OPEN_SPLIT = 1, /* Split current view. */
1976 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1977 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1978};
1979
6b161b31 1980static void
49f2b43f 1981open_view(struct view *prev, enum request request, enum open_flags flags)
b801d8b2 1982{
49f2b43f
JF		 1983 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1984 bool split = !!(flags & OPEN_SPLIT);
1985 bool reload = !!(flags & OPEN_RELOAD);
a28bcc22 1986 struct view *view = VIEW(request);
9f41488f 1987 int nviews = displayed_views();
6e950a52 1988 struct view *base_view = display[0];
b801d8b2 1989
49f2b43f 1990 if (view == prev && nviews == 1 && !reload) {
6b161b31
JF		 1991 report("Already in %s view", view->name);
1992 return;
1993 }
b801d8b2 1994
2509b112 1995 if (view == VIEW(REQ_VIEW_HELP)) {
79d445ca 1996 open_help_view(view);
2509b112
JF		 1997
1998 } else if ((reload || strcmp(view->vid, view->id)) &&
1999 !begin_update(view)) {
6b161b31
JF		 2000 report("Failed to load %s view", view->name);
2001 return;
2002 }
a28bcc22 2003
6b161b31 2004 if (split) {
8d741c06 2005 display[1] = view;
6b161b31 2006 if (!backgrounded)
8d741c06 2007 current_view = 1;
6b161b31
JF		 2008 } else {
2009 /* Maximize the current view. */
2010 memset(display, 0, sizeof(display));
2011 current_view = 0;
2012 display[current_view] = view;
a28bcc22 2013 }
b801d8b2 2014
6e950a52
JF		 2015 /* Resize the view when switching between split- and full-screen,
2016 * or when switching between two different full-screen views. */
2017 if (nviews != displayed_views() ||
2018 (nviews == 1 && base_view != display[0]))
a006db63 2019 resize_display();
b801d8b2 2020
a8891802 2021 if (split && prev->lineno - prev->offset >= prev->height) {
03a93dbb 2022 /* Take the title line into account. */
eb98559e 2023 int lines = prev->lineno - prev->offset - prev->height + 1;
03a93dbb
JF		 2024
2025 /* Scroll the view that was split if the current line is
2026 * outside the new limited view. */
8c317212 2027 do_scroll_view(prev, lines);
03a93dbb
JF		 2028 }
2029
6b161b31 2030 if (prev && view != prev) {
9b995f0c 2031 if (split && !backgrounded) {
f0b3ab80
JF		 2032 /* "Blur" the previous view. */
2033 update_view_title(prev);
9f396969 2034 }
f0b3ab80 2035
f6da0b66 2036 view->parent = prev;
b801d8b2
JF		 2037 }
2038
9f396969 2039 if (view->pipe && view->lines == 0) {
03a93dbb
JF		 2040 /* Clear the old view and let the incremental updating refill
2041 * the screen. */
2042 wclear(view->win);
f97f4012 2043 report("");
03a93dbb
JF		 2044 } else {
2045 redraw_view(view);
24b5b3e0 2046 report("");
03a93dbb 2047 }
6706b2ba
JF		 2048
2049 /* If the view is backgrounded the above calls to report()
2050 * won't redraw the view title. */
2051 if (backgrounded)
2052 update_view_title(view);
b801d8b2
JF		 2053}
2054
2055
6b161b31
JF		 2056/*
2057 * User request switch noodle
2058 */
2059
b801d8b2 2060static int
6b161b31 2061view_driver(struct view *view, enum request request)
b801d8b2 2062{
b801d8b2
JF		 2063 int i;
2064
2065 switch (request) {
4a2909a7
JF		 2066 case REQ_MOVE_UP:
2067 case REQ_MOVE_DOWN:
2068 case REQ_MOVE_PAGE_UP:
2069 case REQ_MOVE_PAGE_DOWN:
2070 case REQ_MOVE_FIRST_LINE:
2071 case REQ_MOVE_LAST_LINE:
8522ecc7 2072 move_view(view, request);
fd85fef1
JF		 2073 break;
2074
4a2909a7
JF		 2075 case REQ_SCROLL_LINE_DOWN:
2076 case REQ_SCROLL_LINE_UP:
2077 case REQ_SCROLL_PAGE_DOWN:
2078 case REQ_SCROLL_PAGE_UP:
a28bcc22 2079 scroll_view(view, request);
b801d8b2
JF		 2080 break;
2081
e733ee54
JF		 2082 case REQ_VIEW_BLOB:
2083 if (!ref_blob[0]) {
2084 report("No file chosen, press 't' to open tree view");
2085 break;
2086 }
2087 /* Fall-through */
4a2909a7 2088 case REQ_VIEW_MAIN:
4a2909a7 2089 case REQ_VIEW_DIFF:
2e8488b4 2090 case REQ_VIEW_LOG:
e733ee54 2091 case REQ_VIEW_TREE:
2e8488b4 2092 case REQ_VIEW_HELP:
6908bdbd 2093 case REQ_VIEW_PAGER:
49f2b43f 2094 open_view(view, request, OPEN_DEFAULT);
b801d8b2
JF		 2095 break;
2096
b3a54cba
JF		 2097 case REQ_NEXT:
2098 case REQ_PREVIOUS:
2099 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2100
e733ee54
JF		 2101 if ((view == VIEW(REQ_VIEW_DIFF) &&
2102 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2103 (view == VIEW(REQ_VIEW_BLOB) &&
2104 view->parent == VIEW(REQ_VIEW_TREE))) {
b3a54cba 2105 view = view->parent;
8522ecc7
JF		 2106 move_view(view, request);
2107 if (view_is_displayed(view))
f0b3ab80 2108 update_view_title(view);
b3a54cba 2109 } else {
8522ecc7 2110 move_view(view, request);
b3a54cba
JF		 2111 break;
2112 }
6706b2ba
JF		 2113 /* Fall-through */
2114
6b161b31 2115 case REQ_ENTER:
6908bdbd
JF		 2116 if (!view->lines) {
2117 report("Nothing to enter");
2118 break;
2119 }
fe7233c3 2120 return view->ops->enter(view, &view->line[view->lineno]);
6b161b31 2121
03a93dbb
JF		 2122 case REQ_VIEW_NEXT:
2123 {
9f41488f 2124 int nviews = displayed_views();
03a93dbb
JF		 2125 int next_view = (current_view + 1) % nviews;
2126
2127 if (next_view == current_view) {
2128 report("Only one view is displayed");
2129 break;
2130 }
2131
2132 current_view = next_view;
2133 /* Blur out the title of the previous view. */
2134 update_view_title(view);
6734f6b9 2135 report("");
03a93dbb
JF		 2136 break;
2137 }
24b5b3e0 2138 case REQ_TOGGLE_LINENO:
b76c2afc 2139 opt_line_number = !opt_line_number;
20bb5e18 2140 redraw_display();
b801d8b2
JF		 2141 break;
2142
54efb62b
JF		 2143 case REQ_TOGGLE_REV_GRAPH:
2144 opt_rev_graph = !opt_rev_graph;
2145 redraw_display();
2146 break;
2147
03a93dbb 2148 case REQ_PROMPT:
8855ada4 2149 /* Always reload^Wrerun commands from the prompt. */
49f2b43f 2150 open_view(view, opt_request, OPEN_RELOAD);
03a93dbb
JF		 2151 break;
2152
4af34daa
JF		 2153 case REQ_SEARCH:
2154 case REQ_SEARCH_BACK:
c02d8fce 2155 search_view(view, request);
4af34daa
JF		 2156 break;
2157
2158 case REQ_FIND_NEXT:
2159 case REQ_FIND_PREV:
2160 find_next(view, request);
2161 break;
2162
4a2909a7 2163 case REQ_STOP_LOADING:
59a45d3a
JF		 2164 for (i = 0; i < ARRAY_SIZE(views); i++) {
2165 view = &views[i];
2e8488b4 2166 if (view->pipe)
6a7bb912 2167 report("Stopped loading the %s view", view->name),
03a93dbb
JF		 2168 end_update(view);
2169 }
b801d8b2
JF		 2170 break;
2171
4a2909a7 2172 case REQ_SHOW_VERSION:
6cb291b7 2173 report("%s (built %s)", VERSION, __DATE__);
b801d8b2
JF		 2174 return TRUE;
2175
fac7db6c
JF		 2176 case REQ_SCREEN_RESIZE:
2177 resize_display();
2178 /* Fall-through */
4a2909a7 2179 case REQ_SCREEN_REDRAW:
20bb5e18 2180 redraw_display();
4a2909a7
JF		 2181 break;
2182
1d754561 2183 case REQ_NONE:
b801d8b2
JF		 2184 doupdate();
2185 return TRUE;
2186
4f9b667a 2187 case REQ_VIEW_CLOSE:
2fcf5401
JF		 2188 /* XXX: Mark closed views by letting view->parent point to the
2189 * view itself. Parents to closed view should never be
2190 * followed. */
2191 if (view->parent &&
2192 view->parent->parent != view->parent) {
4f9b667a
JF		 2193 memset(display, 0, sizeof(display));
2194 current_view = 0;
f6da0b66 2195 display[current_view] = view->parent;
2fcf5401 2196 view->parent = view;
4f9b667a
JF		 2197 resize_display();
2198 redraw_display();
2199 break;
2200 }
2201 /* Fall-through */
b801d8b2
JF		 2202 case REQ_QUIT:
2203 return FALSE;
2204
2205 default:
2e8488b4 2206 /* An unknown key will show most commonly used commands. */
468876c9 2207 report("Unknown key, press 'h' for help");
b801d8b2
JF		 2208 return TRUE;
2209 }
2210
2211 return TRUE;
2212}
2213
2214
2215/*
ff26aa29 2216 * Pager backend
b801d8b2
JF		 2217 */
2218
6b161b31 2219static bool
5dcf8064 2220pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
b801d8b2 2221{
fe7233c3
JF		 2222 char *text = line->data;
2223 enum line_type type = line->type;
2224 int textlen = strlen(text);
78c70acd 2225 int attr;
b801d8b2 2226
6706b2ba
JF		 2227 wmove(view->win, lineno, 0);
2228
5dcf8064 2229 if (selected) {
78c70acd 2230 type = LINE_CURSOR;
6706b2ba 2231 wchgat(view->win, -1, 0, type, NULL);
fd85fef1
JF		 2232 }
2233
78c70acd 2234 attr = get_line_attr(type);
b801d8b2 2235 wattrset(view->win, attr);
b76c2afc 2236
6706b2ba
JF		 2237 if (opt_line_number || opt_tab_size < TABSIZE) {
2238 static char spaces[] = " ";
2239 int col_offset = 0, col = 0;
2240
2241 if (opt_line_number) {
2242 unsigned long real_lineno = view->offset + lineno + 1;
82e78006 2243
6706b2ba
JF		 2244 if (real_lineno == 1 ||
2245 (real_lineno % opt_num_interval) == 0) {
2246 wprintw(view->win, "%.*d", view->digits, real_lineno);
8855ada4 2247
6706b2ba
JF		 2248 } else {
2249 waddnstr(view->win, spaces,
2250 MIN(view->digits, STRING_SIZE(spaces)));
2251 }
2252 waddstr(view->win, ": ");
2253 col_offset = view->digits + 2;
2254 }
8855ada4 2255
fe7233c3 2256 while (text && col_offset + col < view->width) {
6706b2ba 2257 int cols_max = view->width - col_offset - col;
fe7233c3 2258 char *pos = text;
6706b2ba 2259 int cols;
4c6fabc2 2260
fe7233c3
JF		 2261 if (*text == '\t') {
2262 text++;
6706b2ba 2263 assert(sizeof(spaces) > TABSIZE);
fe7233c3 2264 pos = spaces;
6706b2ba 2265 cols = opt_tab_size - (col % opt_tab_size);
82e78006 2266
b76c2afc 2267 } else {
fe7233c3
JF		 2268 text = strchr(text, '\t');
2269 cols = line ? text - pos : strlen(pos);
b76c2afc 2270 }
6706b2ba 2271
fe7233c3 2272 waddnstr(view->win, pos, MIN(cols, cols_max));
6706b2ba 2273 col += cols;
b76c2afc 2274 }
b76c2afc
JF		 2275
2276 } else {
6706b2ba 2277 int col = 0, pos = 0;
b801d8b2 2278
fe7233c3
JF		 2279 for (; pos < textlen && col < view->width; pos++, col++)
2280 if (text[pos] == '\t')
6706b2ba
JF		 2281 col += TABSIZE - (col % TABSIZE) - 1;
2282
fe7233c3 2283 waddnstr(view->win, text, pos);
6706b2ba 2284 }
2e8488b4 2285
b801d8b2
JF		 2286 return TRUE;
2287}
2288
dc23c0e3 2289static bool
d65ced0d 2290add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
dc23c0e3 2291{
17482b11 2292 char refbuf[SIZEOF_STR];
dc23c0e3
JF		 2293 char *ref = NULL;
2294 FILE *pipe;
2295
2296 if (!string_format(refbuf, "git describe %s", commit_id))
2297 return TRUE;
2298
2299 pipe = popen(refbuf, "r");
2300 if (!pipe)
2301 return TRUE;
2302
2303 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2304 ref = chomp_string(ref);
2305 pclose(pipe);
2306
2307 if (!ref || !*ref)
2308 return TRUE;
2309
2310 /* This is the only fatal call, since it can "corrupt" the buffer. */
17482b11 2311 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
dc23c0e3
JF		 2312 return FALSE;
2313
2314 return TRUE;
2315}
2316
7b99a34c
JF		 2317static void
2318add_pager_refs(struct view *view, struct line *line)
2319{
17482b11 2320 char buf[SIZEOF_STR];
c9ca1ec3 2321 char *commit_id = line->data + STRING_SIZE("commit ");
7b99a34c 2322 struct ref **refs;
d65ced0d 2323 size_t bufpos = 0, refpos = 0;
7b99a34c 2324 const char *sep = "Refs: ";
dc23c0e3 2325 bool is_tag = FALSE;
7b99a34c
JF		 2326
2327 assert(line->type == LINE_COMMIT);
2328
c9ca1ec3 2329 refs = get_refs(commit_id);
dc23c0e3
JF		 2330 if (!refs) {
2331 if (view == VIEW(REQ_VIEW_DIFF))
2332 goto try_add_describe_ref;
7b99a34c 2333 return;
dc23c0e3 2334 }
7b99a34c
JF		 2335
2336 do {
cc2d1364
JF		 2337 struct ref *ref = refs[refpos];
2338 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
7b99a34c 2339
cc2d1364
JF		 2340 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2341 return;
7b99a34c 2342 sep = ", ";
dc23c0e3
JF		 2343 if (ref->tag)
2344 is_tag = TRUE;
7b99a34c
JF		 2345 } while (refs[refpos++]->next);
2346
dc23c0e3
JF		 2347 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2348try_add_describe_ref:
d42c8a35 2349 /* Add <tag>-g<commit_id> "fake" reference. */
dc23c0e3
JF		 2350 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2351 return;
2352 }
2353
d42c8a35
JF		 2354 if (bufpos == 0)
2355 return;
2356
cc2d1364 2357 if (!realloc_lines(view, view->line_size + 1))
7b99a34c
JF		 2358 return;
2359
2360 line = &view->line[view->lines];
2361 line->data = strdup(buf);
2362 if (!line->data)
2363 return;
2364
2365 line->type = LINE_PP_REFS;
2366 view->lines++;
2367}
2368
6b161b31 2369static bool
701e4f5d 2370pager_read(struct view *view, char *data)
22f66b0a 2371{
7b99a34c 2372 struct line *line = &view->line[view->lines];
22f66b0a 2373
7b99a34c
JF		 2374 line->data = strdup(data);
2375 if (!line->data)
2376 return FALSE;
fe7233c3 2377
7b99a34c 2378 line->type = get_line_type(line->data);
22f66b0a 2379 view->lines++;
7b99a34c
JF		 2380
2381 if (line->type == LINE_COMMIT &&
2382 (view == VIEW(REQ_VIEW_DIFF) ||
2383 view == VIEW(REQ_VIEW_LOG)))
2384 add_pager_refs(view, line);
2385
22f66b0a
JF		 2386 return TRUE;
2387}
2388
6b161b31 2389static bool
fe7233c3 2390pager_enter(struct view *view, struct line *line)
6b161b31 2391{
91e8e277 2392 int split = 0;
6b161b31 2393
9fbbd28f
JF		 2394 if (line->type == LINE_COMMIT &&
2395 (view == VIEW(REQ_VIEW_LOG) ||
2396 view == VIEW(REQ_VIEW_PAGER))) {
91e8e277
JF		 2397 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2398 split = 1;
67e48ac5
JF		 2399 }
2400
91e8e277
JF		 2401 /* Always scroll the view even if it was split. That way
2402 * you can use Enter to scroll through the log view and
2403 * split open each commit diff. */
2404 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2405
2406 /* FIXME: A minor workaround. Scrolling the view will call report("")
9d82d824
JF		 2407 * but if we are scrolling a non-current view this won't properly
2408 * update the view title. */
91e8e277
JF		 2409 if (split)
2410 update_view_title(view);
6b161b31
JF		 2411
2412 return TRUE;
2413}
2414
4af34daa
JF		 2415static bool
2416pager_grep(struct view *view, struct line *line)
2417{
2418 regmatch_t pmatch;
2419 char *text = line->data;
2420
2421 if (!*text)
2422 return FALSE;
2423
b77b2cb8 2424 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
4af34daa
JF		 2425 return FALSE;
2426
2427 return TRUE;
2428}
2429
d720de4b
JF		 2430static void
2431pager_select(struct view *view, struct line *line)
2432{
2433 if (line->type == LINE_COMMIT) {
2434 char *text = line->data;
2435
5dcf8064 2436 string_copy(view->ref, text + STRING_SIZE("commit "));
d720de4b
JF		 2437 string_copy(ref_commit, view->ref);
2438 }
2439}
2440
6b161b31 2441static struct view_ops pager_ops = {
6734f6b9 2442 "line",
6b161b31
JF		 2443 pager_draw,
2444 pager_read,
2445 pager_enter,
4af34daa 2446 pager_grep,
d720de4b 2447 pager_select,
6b161b31
JF		 2448};
2449
80ce96ea 2450
ff26aa29 2451/*
e733ee54
JF		 2452 * Tree backend
2453 */
2454
4795d620 2455/* Parse output from git-ls-tree(1):
e733ee54
JF		 2456 *
2457 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2458 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2459 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2460 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2461 */
2462
2463#define SIZEOF_TREE_ATTR \
2464 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2465
2466#define TREE_UP_FORMAT "040000 tree %s\t.."
2467
2468static int
2469tree_compare_entry(enum line_type type1, char *name1,
2470 enum line_type type2, char *name2)
2471{
2472 if (type1 != type2) {
2473 if (type1 == LINE_TREE_DIR)
2474 return -1;
2475 return 1;
2476 }
2477
2478 return strcmp(name1, name2);
2479}
2480
2481static bool
2482tree_read(struct view *view, char *text)
2483{
2484 size_t textlen = strlen(text);
2485 char buf[SIZEOF_STR];
2486 unsigned long pos;
2487 enum line_type type;
f88a5319 2488 bool first_read = view->lines == 0;
e733ee54
JF		 2489
2490 if (textlen <= SIZEOF_TREE_ATTR)
2491 return FALSE;
2492
2493 type = text[STRING_SIZE("100644 ")] == 't'
2494 ? LINE_TREE_DIR : LINE_TREE_FILE;
2495
f88a5319 2496 if (first_read) {
e733ee54 2497 /* Add path info line */
4ea4ce91 2498 if (string_format(buf, "Directory path /%s", opt_path) &&
e733ee54
JF		 2499 realloc_lines(view, view->line_size + 1) &&
2500 pager_read(view, buf))
2501 view->line[view->lines - 1].type = LINE_DEFAULT;
2502 else
2503 return FALSE;
2504
2505 /* Insert "link" to parent directory. */
2506 if (*opt_path &&
4ea4ce91 2507 string_format(buf, TREE_UP_FORMAT, view->ref) &&
e733ee54
JF		 2508 realloc_lines(view, view->line_size + 1) &&
2509 pager_read(view, buf))
2510 view->line[view->lines - 1].type = LINE_TREE_DIR;
2511 else if (*opt_path)
2512 return FALSE;
2513 }
2514
2515 /* Strip the path part ... */
2516 if (*opt_path) {
2517 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2518 size_t striplen = strlen(opt_path);
2519 char *path = text + SIZEOF_TREE_ATTR;
2520
2521 if (pathlen > striplen)
2522 memmove(path, path + striplen,
2523 pathlen - striplen + 1);
2524 }
2525
2526 /* Skip "Directory ..." and ".." line. */
2527 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2528 struct line *line = &view->line[pos];
2529 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2530 char *path2 = text + SIZEOF_TREE_ATTR;
2531 int cmp = tree_compare_entry(line->type, path1, type, path2);
2532
2533 if (cmp <= 0)
2534 continue;
2535
2536 text = strdup(text);
2537 if (!text)
2538 return FALSE;
2539
2540 if (view->lines > pos)
2541 memmove(&view->line[pos + 1], &view->line[pos],
2542 (view->lines - pos) * sizeof(*line));
2543
2544 line = &view->line[pos];
2545 line->data = text;
2546 line->type = type;
2547 view->lines++;
2548 return TRUE;
2549 }
2550
2551 if (!pager_read(view, text))
2552 return FALSE;
2553
f88a5319
JF		 2554 /* Move the current line to the first tree entry. */
2555 if (first_read)
2556 view->lineno++;
2557
e733ee54
JF		 2558 view->line[view->lines - 1].type = type;
2559 return TRUE;
2560}
2561
2562static bool
2563tree_enter(struct view *view, struct line *line)
2564{
2b42e5d6 2565 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
e733ee54
JF		 2566 enum request request;
2567
2568 switch (line->type) {
2569 case LINE_TREE_DIR:
2570 /* Depending on whether it is a subdir or parent (updir?) link
2571 * mangle the path buffer. */
2572 if (line == &view->line[1] && *opt_path) {
2573 size_t path_len = strlen(opt_path);
2574 char *dirsep = opt_path + path_len - 1;
2575
2576 while (dirsep > opt_path && dirsep[-1] != '/')
2577 dirsep--;
2578
2579 dirsep[0] = 0;
2580
2581 } else {
d65ced0d 2582 size_t pathlen = strlen(opt_path);
4ea4ce91 2583 size_t origlen = pathlen;
4795d620 2584 char *data = line->data;
e733ee54
JF		 2585 char *basename = data + SIZEOF_TREE_ATTR;
2586
4038038f 2587 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
4ea4ce91
JF		 2588 opt_path[origlen] = 0;
2589 return TRUE;
2590 }
e733ee54
JF		 2591 }
2592
2593 /* Trees and subtrees share the same ID, so they are not not
2594 * unique like blobs. */
2595 flags |= OPEN_RELOAD;
2596 request = REQ_VIEW_TREE;
2597 break;
2598
2599 case LINE_TREE_FILE:
e733ee54
JF		 2600 request = REQ_VIEW_BLOB;
2601 break;
2602
2603 default:
2604 return TRUE;
2605 }
2606
2607 open_view(view, request, flags);
2608
e733ee54
JF		 2609 return TRUE;
2610}
2611
d720de4b
JF		 2612static void
2613tree_select(struct view *view, struct line *line)
2614{
73c76ef5
JF		 2615 char *text = line->data;
2616
2617 text += STRING_SIZE("100644 blob ");
2618
2619 if (line->type == LINE_TREE_FILE) {
2620 string_ncopy(ref_blob, text, 40);
2621 /* Also update the blob view's ref, since all there must always
2622 * be in sync. */
2623 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
d720de4b 2624
ebbaf4fe
JF		 2625 } else if (line->type != LINE_TREE_DIR) {
2626 return;
d720de4b 2627 }
ebbaf4fe
JF		 2628
2629 string_ncopy(view->ref, text, 40);
d720de4b
JF		 2630}
2631
e733ee54
JF		 2632static struct view_ops tree_ops = {
2633 "file",
2634 pager_draw,
2635 tree_read,
2636 tree_enter,
2637 pager_grep,
d720de4b 2638 tree_select,
e733ee54
JF		 2639};
2640
2641static bool
2642blob_read(struct view *view, char *line)
2643{
2644 bool state = pager_read(view, line);
2645
2646 if (state == TRUE)
2647 view->line[view->lines - 1].type = LINE_DEFAULT;
2648
2649 return state;
2650}
2651
2652static struct view_ops blob_ops = {
2653 "line",
2654 pager_draw,
2655 blob_read,
2656 pager_enter,
2657 pager_grep,
d720de4b 2658 pager_select,
e733ee54
JF		 2659};
2660
2661
2662/*
ff26aa29
JF		 2663 * Main view backend
2664 */
2665
2666struct commit {
10446330 2667 char id[SIZEOF_REV]; /* SHA1 ID. */
54efb62b
JF		 2668 char title[75]; /* First line of the commit message. */
2669 char author[75]; /* Author of the commit. */
2670 struct tm time; /* Date from the author ident. */
2671 struct ref **refs; /* Repository references. */
2672 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2673 size_t graph_size; /* The width of the graph array. */
ff26aa29 2674};
c34d9c9f 2675
6b161b31 2676static bool
5dcf8064 2677main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
22f66b0a 2678{
2e8488b4 2679 char buf[DATE_COLS + 1];
fe7233c3 2680 struct commit *commit = line->data;
78c70acd 2681 enum line_type type;
6706b2ba 2682 int col = 0;
b76c2afc 2683 size_t timelen;
10e290ee 2684 size_t authorlen;
9989bf60 2685 int trimmed = 1;
22f66b0a 2686
4c6fabc2
JF		 2687 if (!*commit->author)
2688 return FALSE;
22f66b0a 2689
6706b2ba
JF		 2690 wmove(view->win, lineno, col);
2691
5dcf8064 2692 if (selected) {
78c70acd 2693 type = LINE_CURSOR;
6706b2ba
JF		 2694 wattrset(view->win, get_line_attr(type));
2695 wchgat(view->win, -1, 0, type, NULL);
2696
78c70acd 2697 } else {
b76c2afc 2698 type = LINE_MAIN_COMMIT;
6706b2ba 2699 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
b76c2afc
JF		 2700 }
2701
4c6fabc2 2702 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
b76c2afc 2703 waddnstr(view->win, buf, timelen);
4c6fabc2 2704 waddstr(view->win, " ");
b76c2afc 2705
6706b2ba
JF		 2706 col += DATE_COLS;
2707 wmove(view->win, lineno, col);
2708 if (type != LINE_CURSOR)
2709 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
b76c2afc 2710
9989bf60
JF		 2711 if (opt_utf8) {
2712 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2713 } else {
2714 authorlen = strlen(commit->author);
2715 if (authorlen > AUTHOR_COLS - 2) {
2716 authorlen = AUTHOR_COLS - 2;
2717 trimmed = 1;
2718 }
2719 }
10e290ee
JF		 2720
2721 if (trimmed) {
2722 waddnstr(view->win, commit->author, authorlen);
6706b2ba
JF		 2723 if (type != LINE_CURSOR)
2724 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
b76c2afc
JF		 2725 waddch(view->win, '~');
2726 } else {
2727 waddstr(view->win, commit->author);
22f66b0a
JF		 2728 }
2729
10e290ee 2730 col += AUTHOR_COLS;
6706b2ba
JF		 2731 if (type != LINE_CURSOR)
2732 wattrset(view->win, A_NORMAL);
2733
54efb62b
JF		 2734 if (opt_rev_graph && commit->graph_size) {
2735 size_t i;
2736
2737 wmove(view->win, lineno, col);
2738 /* Using waddch() instead of waddnstr() ensures that
2739 * they'll be rendered correctly for the cursor line. */
2740 for (i = 0; i < commit->graph_size; i++)
2741 waddch(view->win, commit->graph[i]);
2742
2743 col += commit->graph_size + 1;
2744 }
2745
2746 wmove(view->win, lineno, col);
c34d9c9f
JF		 2747
2748 if (commit->refs) {
2749 size_t i = 0;
2750
2751 do {
6706b2ba
JF		 2752 if (type == LINE_CURSOR)
2753 ;
2754 else if (commit->refs[i]->tag)
c34d9c9f
JF		 2755 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2756 else
2757 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2758 waddstr(view->win, "[");
2759 waddstr(view->win, commit->refs[i]->name);
2760 waddstr(view->win, "]");
6706b2ba
JF		 2761 if (type != LINE_CURSOR)
2762 wattrset(view->win, A_NORMAL);
c34d9c9f 2763 waddstr(view->win, " ");
6706b2ba 2764 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
c34d9c9f
JF		 2765 } while (commit->refs[i++]->next);
2766 }
2767
6706b2ba
JF		 2768 if (type != LINE_CURSOR)
2769 wattrset(view->win, get_line_attr(type));
2770
2771 {
2772 int titlelen = strlen(commit->title);
2773
2774 if (col + titlelen > view->width)
2775 titlelen = view->width - col;
2776
2777 waddnstr(view->win, commit->title, titlelen);
2778 }
22f66b0a
JF		 2779
2780 return TRUE;
2781}
2782
4c6fabc2 2783/* Reads git log --pretty=raw output and parses it into the commit struct. */
6b161b31 2784static bool
701e4f5d 2785main_read(struct view *view, char *line)
22f66b0a 2786{
78c70acd 2787 enum line_type type = get_line_type(line);
701e4f5d
JF		 2788 struct commit *commit = view->lines
2789 ? view->line[view->lines - 1].data : NULL;
22f66b0a 2790
78c70acd
JF		 2791 switch (type) {
2792 case LINE_COMMIT:
22f66b0a
JF		 2793 commit = calloc(1, sizeof(struct commit));
2794 if (!commit)
2795 return FALSE;
2796
4c6fabc2 2797 line += STRING_SIZE("commit ");
b76c2afc 2798
fe7233c3 2799 view->line[view->lines++].data = commit;
82e78006 2800 string_copy(commit->id, line);
c34d9c9f 2801 commit->refs = get_refs(commit->id);
54efb62b 2802 commit->graph[commit->graph_size++] = ACS_LTEE;
78c70acd 2803 break;
22f66b0a 2804
8855ada4 2805 case LINE_AUTHOR:
b76c2afc 2806 {
4c6fabc2 2807 char *ident = line + STRING_SIZE("author ");
b76c2afc
JF		 2808 char *end = strchr(ident, '<');
2809
701e4f5d 2810 if (!commit)
fe7233c3
JF		 2811 break;
2812
b76c2afc 2813 if (end) {
cbbf2d1b
JF		 2814 char *email = end + 1;
2815
b76c2afc 2816 for (; end > ident && isspace(end[-1]); end--) ;
cbbf2d1b
JF		 2817
2818 if (end == ident && *email) {
2819 ident = email;
2820 end = strchr(ident, '>');
2821 for (; end > ident && isspace(end[-1]); end--) ;
2822 }
b76c2afc
JF		 2823 *end = 0;
2824 }
2825
cbbf2d1b
JF		 2826 /* End is NULL or ident meaning there's no author. */
2827 if (end <= ident)
2828 ident = "Unknown";
2829
82e78006 2830 string_copy(commit->author, ident);
b76c2afc 2831
4c6fabc2 2832 /* Parse epoch and timezone */
b76c2afc
JF		 2833 if (end) {
2834 char *secs = strchr(end + 1, '>');
2835 char *zone;
2836 time_t time;
2837
2838 if (!secs || secs[1] != ' ')
2839 break;
2840
2841 secs += 2;
2842 time = (time_t) atol(secs);
2843 zone = strchr(secs, ' ');
4c6fabc2 2844 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
b76c2afc
JF		 2845 long tz;
2846
2847 zone++;
2848 tz = ('0' - zone[1]) * 60 * 60 * 10;
2849 tz += ('0' - zone[2]) * 60 * 60;
2850 tz += ('0' - zone[3]) * 60;
2851 tz += ('0' - zone[4]) * 60;
2852
2853 if (zone[0] == '-')
2854 tz = -tz;
2855
2856 time -= tz;
2857 }
2858 gmtime_r(&time, &commit->time);
2859 }
2860 break;
2861 }
78c70acd 2862 default:
701e4f5d 2863 if (!commit)
2e8488b4
JF		 2864 break;
2865
2866 /* Fill in the commit title if it has not already been set. */
2e8488b4
JF		 2867 if (commit->title[0])
2868 break;
2869
2870 /* Require titles to start with a non-space character at the
2871 * offset used by git log. */
eb98559e
JF		 2872 /* FIXME: More gracefull handling of titles; append "..." to
2873 * shortened titles, etc. */
2e8488b4 2874 if (strncmp(line, " ", 4) ||
eb98559e 2875 isspace(line[4]))
82e78006
JF		 2876 break;
2877
2878 string_copy(commit->title, line + 4);
22f66b0a
JF		 2879 }
2880
2881 return TRUE;
2882}
2883
6b161b31 2884static bool
fe7233c3 2885main_enter(struct view *view, struct line *line)
b801d8b2 2886{
b3a54cba
JF		 2887 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2888
2889 open_view(view, REQ_VIEW_DIFF, flags);
6b161b31 2890 return TRUE;
b801d8b2
JF		 2891}
2892
4af34daa
JF		 2893static bool
2894main_grep(struct view *view, struct line *line)
2895{
2896 struct commit *commit = line->data;
2897 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2898 char buf[DATE_COLS + 1];
2899 regmatch_t pmatch;
2900
2901 for (state = S_TITLE; state < S_END; state++) {
2902 char *text;
2903
2904 switch (state) {
2905 case S_TITLE: text = commit->title; break;
2906 case S_AUTHOR: text = commit->author; break;
2907 case S_DATE:
2908 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2909 continue;
2910 text = buf;
2911 break;
2912
2913 default:
2914 return FALSE;
2915 }
2916
b77b2cb8 2917 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4af34daa
JF		 2918 return TRUE;
2919 }
2920
2921 return FALSE;
2922}
2923
d720de4b
JF		 2924static void
2925main_select(struct view *view, struct line *line)
2926{
2927 struct commit *commit = line->data;
2928
2929 string_copy(view->ref, commit->id);
2930 string_copy(ref_commit, view->ref);
2931}
2932
6b161b31 2933static struct view_ops main_ops = {
6734f6b9 2934 "commit",
6b161b31
JF		 2935 main_draw,
2936 main_read,
2937 main_enter,
4af34daa 2938 main_grep,
d720de4b 2939 main_select,
6b161b31 2940};
2e8488b4 2941
c34d9c9f 2942
6b161b31 2943/*
10e290ee
JF		 2944 * Unicode / UTF-8 handling
2945 *
2946 * NOTE: Much of the following code for dealing with unicode is derived from
2947 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2948 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2949 */
2950
2951/* I've (over)annotated a lot of code snippets because I am not entirely
2952 * confident that the approach taken by this small UTF-8 interface is correct.
2953 * --jonas */
2954
2955static inline int
2956unicode_width(unsigned long c)
2957{
2958 if (c >= 0x1100 &&
2959 (c <= 0x115f /* Hangul Jamo */
2960 || c == 0x2329
2961 || c == 0x232a
2962 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
f97f4012 2963 /* CJK ... Yi */
10e290ee
JF		 2964 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2965 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2966 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2967 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2968 || (c >= 0xffe0 && c <= 0xffe6)
2969 || (c >= 0x20000 && c <= 0x2fffd)
2970 || (c >= 0x30000 && c <= 0x3fffd)))
2971 return 2;
2972
2973 return 1;
2974}
2975
2976/* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2977 * Illegal bytes are set one. */
2978static const unsigned char utf8_bytes[256] = {
2979 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,
2980 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,
2981 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,
2982 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,
2983 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,
2984 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,
2985 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,
2986 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,
2987};
2988
2989/* Decode UTF-8 multi-byte representation into a unicode character. */
2990static inline unsigned long
2991utf8_to_unicode(const char *string, size_t length)
2992{
2993 unsigned long unicode;
2994
2995 switch (length) {
2996 case 1:
2997 unicode = string[0];
2998 break;
2999 case 2:
3000 unicode = (string[0] & 0x1f) << 6;
3001 unicode += (string[1] & 0x3f);
3002 break;
3003 case 3:
3004 unicode = (string[0] & 0x0f) << 12;
3005 unicode += ((string[1] & 0x3f) << 6);
3006 unicode += (string[2] & 0x3f);
3007 break;
3008 case 4:
3009 unicode = (string[0] & 0x0f) << 18;
3010 unicode += ((string[1] & 0x3f) << 12);
3011 unicode += ((string[2] & 0x3f) << 6);
3012 unicode += (string[3] & 0x3f);
3013 break;
3014 case 5:
3015 unicode = (string[0] & 0x0f) << 24;
3016 unicode += ((string[1] & 0x3f) << 18);
3017 unicode += ((string[2] & 0x3f) << 12);
3018 unicode += ((string[3] & 0x3f) << 6);
3019 unicode += (string[4] & 0x3f);
3020 break;
68b6e0eb 3021 case 6:
10e290ee
JF		 3022 unicode = (string[0] & 0x01) << 30;
3023 unicode += ((string[1] & 0x3f) << 24);
3024 unicode += ((string[2] & 0x3f) << 18);
3025 unicode += ((string[3] & 0x3f) << 12);
3026 unicode += ((string[4] & 0x3f) << 6);
3027 unicode += (string[5] & 0x3f);
3028 break;
3029 default:
3030 die("Invalid unicode length");
3031 }
3032
3033 /* Invalid characters could return the special 0xfffd value but NUL
3034 * should be just as good. */
3035 return unicode > 0xffff ? 0 : unicode;
3036}
3037
3038/* Calculates how much of string can be shown within the given maximum width
3039 * and sets trimmed parameter to non-zero value if all of string could not be
3040 * shown.
3041 *
3042 * Additionally, adds to coloffset how many many columns to move to align with
3043 * the expected position. Takes into account how multi-byte and double-width
3044 * characters will effect the cursor position.
3045 *
3046 * Returns the number of bytes to output from string to satisfy max_width. */
3047static size_t
3048utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3049{
3050 const char *start = string;
3051 const char *end = strchr(string, '\0');
3052 size_t mbwidth = 0;
3053 size_t width = 0;
3054
3055 *trimmed = 0;
3056
3057 while (string < end) {
3058 int c = *(unsigned char *) string;
3059 unsigned char bytes = utf8_bytes[c];
3060 size_t ucwidth;
3061 unsigned long unicode;
3062
3063 if (string + bytes > end)
3064 break;
3065
3066 /* Change representation to figure out whether
3067 * it is a single- or double-width character. */
3068
3069 unicode = utf8_to_unicode(string, bytes);
3070 /* FIXME: Graceful handling of invalid unicode character. */
3071 if (!unicode)
3072 break;
3073
3074 ucwidth = unicode_width(unicode);
3075 width += ucwidth;
3076 if (width > max_width) {
3077 *trimmed = 1;
3078 break;
3079 }
3080
3081 /* The column offset collects the differences between the
3082 * number of bytes encoding a character and the number of
3083 * columns will be used for rendering said character.
3084 *
3085 * So if some character A is encoded in 2 bytes, but will be
3086 * represented on the screen using only 1 byte this will and up
3087 * adding 1 to the multi-byte column offset.
3088 *
3089 * Assumes that no double-width character can be encoding in
3090 * less than two bytes. */
3091 if (bytes > ucwidth)
3092 mbwidth += bytes - ucwidth;
3093
3094 string += bytes;
3095 }
3096
3097 *coloffset += mbwidth;
3098
3099 return string - start;
3100}
3101
3102
3103/*
6b161b31
JF		 3104 * Status management
3105 */
2e8488b4 3106
8855ada4 3107/* Whether or not the curses interface has been initialized. */
68b6e0eb 3108static bool cursed = FALSE;
8855ada4 3109
6b161b31
JF		 3110/* The status window is used for polling keystrokes. */
3111static WINDOW *status_win;
4a2909a7 3112
2e8488b4 3113/* Update status and title window. */
4a2909a7
JF		 3114static void
3115report(const char *msg, ...)
3116{
6706b2ba
JF		 3117 static bool empty = TRUE;
3118 struct view *view = display[current_view];
b76c2afc 3119
6706b2ba
JF		 3120 if (!empty || *msg) {
3121 va_list args;
4a2909a7 3122
6706b2ba 3123 va_start(args, msg);
4b76734f 3124
6706b2ba
JF		 3125 werase(status_win);
3126 wmove(status_win, 0, 0);
3127 if (*msg) {
3128 vwprintw(status_win, msg, args);
3129 empty = FALSE;
3130 } else {
3131 empty = TRUE;
3132 }
3133 wrefresh(status_win);
b801d8b2 3134
6706b2ba
JF		 3135 va_end(args);
3136 }
3137
3138 update_view_title(view);
2bee3bde 3139 update_display_cursor(view);
b801d8b2
JF		 3140}
3141
6b161b31
JF		 3142/* Controls when nodelay should be in effect when polling user input. */
3143static void
1ba2ae4b 3144set_nonblocking_input(bool loading)
b801d8b2 3145{
6706b2ba 3146 static unsigned int loading_views;
b801d8b2 3147
6706b2ba
JF		 3148 if ((loading == FALSE && loading_views-- == 1) ||
3149 (loading == TRUE && loading_views++ == 0))
1ba2ae4b 3150 nodelay(status_win, loading);
6b161b31
JF		 3151}
3152
3153static void
3154init_display(void)
3155{
3156 int x, y;
b76c2afc 3157
6908bdbd
JF		 3158 /* Initialize the curses library */
3159 if (isatty(STDIN_FILENO)) {
8855ada4 3160 cursed = !!initscr();
6908bdbd
JF		 3161 } else {
3162 /* Leave stdin and stdout alone when acting as a pager. */
3163 FILE *io = fopen("/dev/tty", "r+");
3164
e6f60674
JF		 3165 if (!io)
3166 die("Failed to open /dev/tty");
8855ada4 3167 cursed = !!newterm(NULL, io, io);
6908bdbd
JF		 3168 }
3169
8855ada4
JF		 3170 if (!cursed)
3171 die("Failed to initialize curses");
3172
2e8488b4
JF		 3173 nonl(); /* Tell curses not to do NL->CR/NL on output */
3174 cbreak(); /* Take input chars one at a time, no wait for \n */
3175 noecho(); /* Don't echo input */
b801d8b2 3176 leaveok(stdscr, TRUE);
b801d8b2
JF		 3177
3178 if (has_colors())
3179 init_colors();
3180
3181 getmaxyx(stdscr, y, x);
3182 status_win = newwin(1, 0, y - 1, 0);
3183 if (!status_win)
3184 die("Failed to create status window");
3185
3186 /* Enable keyboard mapping */
3187 keypad(status_win, TRUE);
78c70acd 3188 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6b161b31
JF		 3189}
3190
4af34daa 3191static char *
cb9e48c1 3192read_prompt(const char *prompt)
ef5404a4
JF		 3193{
3194 enum { READING, STOP, CANCEL } status = READING;
9e21ce5c 3195 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
ef5404a4
JF		 3196 int pos = 0;
3197
3198 while (status == READING) {
3199 struct view *view;
3200 int i, key;
3201
699ae55b 3202 foreach_view (view, i)
ef5404a4
JF		 3203 update_view(view);
3204
cb9e48c1 3205 report("%s%.*s", prompt, pos, buf);
ef5404a4
JF		 3206 /* Refresh, accept single keystroke of input */
3207 key = wgetch(status_win);
3208 switch (key) {
3209 case KEY_RETURN:
3210 case KEY_ENTER:
3211 case '\n':
3212 status = pos ? STOP : CANCEL;
3213 break;
3214
3215 case KEY_BACKSPACE:
3216 if (pos > 0)
3217 pos--;
3218 else
3219 status = CANCEL;
3220 break;
3221
3222 case KEY_ESC:
3223 status = CANCEL;
3224 break;
3225
3226 case ERR:
3227 break;
3228
3229 default:
3230 if (pos >= sizeof(buf)) {
3231 report("Input string too long");
9e21ce5c 3232 return NULL;
ef5404a4
JF		 3233 }
3234
3235 if (isprint(key))
3236 buf[pos++] = (char) key;
3237 }
3238 }
3239
3240 if (status == CANCEL) {
3241 /* Clear the status window */
3242 report("");
9e21ce5c 3243 return NULL;
ef5404a4
JF		 3244 }
3245
3246 buf[pos++] = 0;
ef5404a4 3247
9e21ce5c 3248 return buf;
ef5404a4 3249}
c34d9c9f
JF		 3250
3251/*
3252 * Repository references
3253 */
3254
3255static struct ref *refs;
3a91b75e 3256static size_t refs_size;
c34d9c9f 3257
1307df1a
JF		 3258/* Id <-> ref store */
3259static struct ref ***id_refs;
3260static size_t id_refs_size;
3261
c34d9c9f
JF		 3262static struct ref **
3263get_refs(char *id)
3264{
1307df1a
JF		 3265 struct ref ***tmp_id_refs;
3266 struct ref **ref_list = NULL;
3267 size_t ref_list_size = 0;
c34d9c9f
JF		 3268 size_t i;
3269
1307df1a
JF		 3270 for (i = 0; i < id_refs_size; i++)
3271 if (!strcmp(id, id_refs[i][0]->id))
3272 return id_refs[i];
3273
3274 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3275 if (!tmp_id_refs)
3276 return NULL;
3277
3278 id_refs = tmp_id_refs;
3279
c34d9c9f
JF		 3280 for (i = 0; i < refs_size; i++) {
3281 struct ref **tmp;
3282
3283 if (strcmp(id, refs[i].id))
3284 continue;
3285
1307df1a 3286 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
c34d9c9f 3287 if (!tmp) {
1307df1a
JF		 3288 if (ref_list)
3289 free(ref_list);
c34d9c9f
JF		 3290 return NULL;
3291 }
3292
1307df1a
JF		 3293 ref_list = tmp;
3294 if (ref_list_size > 0)
3295 ref_list[ref_list_size - 1]->next = 1;
3296 ref_list[ref_list_size] = &refs[i];
3af8774e
JF		 3297
3298 /* XXX: The properties of the commit chains ensures that we can
3299 * safely modify the shared ref. The repo references will
3300 * always be similar for the same id. */
1307df1a
JF		 3301 ref_list[ref_list_size]->next = 0;
3302 ref_list_size++;
c34d9c9f
JF		 3303 }
3304
1307df1a
JF		 3305 if (ref_list)
3306 id_refs[id_refs_size++] = ref_list;
3307
3308 return ref_list;
c34d9c9f
JF		 3309}
3310
3311static int
d0cea5f9 3312read_ref(char *id, int idlen, char *name, int namelen)
c34d9c9f 3313{
d0cea5f9
JF		 3314 struct ref *ref;
3315 bool tag = FALSE;
d0cea5f9 3316
8b0297ae
JF		 3317 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3318 /* Commits referenced by tags has "^{}" appended. */
3319 if (name[namelen - 1] != '}')
3320 return OK;
3321
d0cea5f9
JF		 3322 while (namelen > 0 && name[namelen] != '^')
3323 namelen--;
c34d9c9f 3324
d0cea5f9 3325 tag = TRUE;
8b0297ae
JF		 3326 namelen -= STRING_SIZE("refs/tags/");
3327 name += STRING_SIZE("refs/tags/");
c34d9c9f 3328
d0cea5f9 3329 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
8b0297ae
JF		 3330 namelen -= STRING_SIZE("refs/heads/");
3331 name += STRING_SIZE("refs/heads/");
c34d9c9f 3332
d0cea5f9
JF		 3333 } else if (!strcmp(name, "HEAD")) {
3334 return OK;
3335 }
6706b2ba 3336
d0cea5f9
JF		 3337 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3338 if (!refs)
3339 return ERR;
c34d9c9f 3340
d0cea5f9 3341 ref = &refs[refs_size++];
8b0297ae 3342 ref->name = malloc(namelen + 1);
d0cea5f9
JF		 3343 if (!ref->name)
3344 return ERR;
3af8774e 3345
8b0297ae
JF		 3346 strncpy(ref->name, name, namelen);
3347 ref->name[namelen] = 0;
d0cea5f9
JF		 3348 ref->tag = tag;
3349 string_copy(ref->id, id);
3af8774e 3350
d0cea5f9
JF		 3351 return OK;
3352}
c34d9c9f 3353
d0cea5f9
JF		 3354static int
3355load_refs(void)
3356{
3357 const char *cmd_env = getenv("TIG_LS_REMOTE");
3358 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
c34d9c9f 3359
4a63c884 3360 return read_properties(popen(cmd, "r"), "\t", read_ref);
d0cea5f9 3361}
c34d9c9f 3362
d0cea5f9 3363static int
14c778a6 3364read_repo_config_option(char *name, int namelen, char *value, int valuelen)
d0cea5f9 3365{
22913179 3366 if (!strcmp(name, "i18n.commitencoding"))
d0cea5f9 3367 string_copy(opt_encoding, value);
c34d9c9f 3368
c34d9c9f
JF		 3369 return OK;
3370}
3371
4670cf89 3372static int
14c778a6 3373load_repo_config(void)
4670cf89 3374{
66749723 3375 return read_properties(popen("git repo-config --list", "r"),
14c778a6 3376 "=", read_repo_config_option);
d0cea5f9
JF		 3377}
3378
3379static int
4a63c884 3380read_properties(FILE *pipe, const char *separators,
d0cea5f9
JF		 3381 int (*read_property)(char *, int, char *, int))
3382{
4670cf89
JF		 3383 char buffer[BUFSIZ];
3384 char *name;
d0cea5f9 3385 int state = OK;
4670cf89
JF		 3386
3387 if (!pipe)
3388 return ERR;
3389
d0cea5f9 3390 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4a63c884
JF		 3391 char *value;
3392 size_t namelen;
3393 size_t valuelen;
4670cf89 3394
4a63c884
JF		 3395 name = chomp_string(name);
3396 namelen = strcspn(name, separators);
3397
3398 if (name[namelen]) {
3399 name[namelen] = 0;
3400 value = chomp_string(name + namelen + 1);
d0cea5f9 3401 valuelen = strlen(value);
4670cf89 3402
d0cea5f9 3403 } else {
d0cea5f9
JF		 3404 value = "";
3405 valuelen = 0;
4670cf89 3406 }
d0cea5f9 3407
3c3801c2 3408 state = read_property(name, namelen, value, valuelen);
4670cf89
JF		 3409 }
3410
d0cea5f9
JF		 3411 if (state != ERR && ferror(pipe))
3412 state = ERR;
4670cf89
JF		 3413
3414 pclose(pipe);
3415
d0cea5f9 3416 return state;
4670cf89
JF		 3417}
3418
d0cea5f9 3419
6b161b31
JF		 3420/*
3421 * Main
3422 */
3423
b5c9e67f 3424static void __NORETURN
6b161b31
JF		 3425quit(int sig)
3426{
8855ada4
JF		 3427 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3428 if (cursed)
3429 endwin();
6b161b31
JF		 3430 exit(0);
3431}
3432
c6704a4e
JF		 3433static void __NORETURN
3434die(const char *err, ...)
6b161b31
JF		 3435{
3436 va_list args;
3437
3438 endwin();
3439
3440 va_start(args, err);
3441 fputs("tig: ", stderr);
3442 vfprintf(stderr, err, args);
3443 fputs("\n", stderr);
3444 va_end(args);
3445
3446 exit(1);
3447}
3448
3449int
3450main(int argc, char *argv[])
3451{
1ba2ae4b 3452 struct view *view;
6b161b31 3453 enum request request;
1ba2ae4b 3454 size_t i;
6b161b31
JF		 3455
3456 signal(SIGINT, quit);
3457
6b68fd24
JF		 3458 if (setlocale(LC_ALL, "")) {
3459 string_copy(opt_codeset, nl_langinfo(CODESET));
3460 }
3461
660e09ad
JF		 3462 if (load_options() == ERR)
3463 die("Failed to load user config.");
3464
3465 /* Load the repo config file so options can be overwritten from
afdc35b3 3466 * the command line. */
14c778a6 3467 if (load_repo_config() == ERR)
afdc35b3
JF		 3468 die("Failed to load repo config.");
3469
8855ada4 3470 if (!parse_options(argc, argv))
6b161b31
JF		 3471 return 0;
3472
6b68fd24
JF		 3473 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3474 opt_iconv = iconv_open(opt_codeset, opt_encoding);
20f4b4a3 3475 if (opt_iconv == ICONV_NONE)
6b68fd24
JF		 3476 die("Failed to initialize character set conversion");
3477 }
3478
c34d9c9f
JF		 3479 if (load_refs() == ERR)
3480 die("Failed to load refs.");
3481
7bb55251
JF		 3482 /* Require a git repository unless when running in pager mode. */
3483 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3484 die("Not a git repository");
3485
1ba2ae4b
JF		 3486 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3487 view->cmd_env = getenv(view->cmd_env);
3488
6b161b31
JF		 3489 request = opt_request;
3490
3491 init_display();
b801d8b2
JF		 3492
3493 while (view_driver(display[current_view], request)) {
6b161b31 3494 int key;
b801d8b2
JF		 3495 int i;
3496
699ae55b 3497 foreach_view (view, i)
6b161b31 3498 update_view(view);
b801d8b2
JF		 3499
3500 /* Refresh, accept single keystroke of input */
6b161b31 3501 key = wgetch(status_win);
04e2b7b2
JF		 3502
3503 request = get_keybinding(display[current_view]->keymap, key);
03a93dbb 3504
6706b2ba 3505 /* Some low-level request handling. This keeps access to
fac7db6c
JF		 3506 * status_win restricted. */
3507 switch (request) {
3508 case REQ_PROMPT:
9e21ce5c
JF		 3509 {
3510 char *cmd = read_prompt(":");
3511
3512 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3513 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3514 opt_request = REQ_VIEW_DIFF;
3515 } else {
3516 opt_request = REQ_VIEW_PAGER;
3517 }
3518 break;
3519 }
fac7db6c 3520
1d754561 3521 request = REQ_NONE;
9e21ce5c
JF		 3522 break;
3523 }
4af34daa
JF		 3524 case REQ_SEARCH:
3525 case REQ_SEARCH_BACK:
3526 {
3527 const char *prompt = request == REQ_SEARCH
3528 ? "/" : "?";
3529 char *search = read_prompt(prompt);
3530
3531 if (search)
3532 string_copy(opt_search, search);
3533 else
3534 request = REQ_NONE;
3535 break;
3536 }
fac7db6c
JF		 3537 case REQ_SCREEN_RESIZE:
3538 {
3539 int height, width;
3540
3541 getmaxyx(stdscr, height, width);
3542
3543 /* Resize the status view and let the view driver take
3544 * care of resizing the displayed views. */
3545 wresize(status_win, 1, width);
3546 mvwin(status_win, height - 1, 0);
3547 wrefresh(status_win);
3548 break;
3549 }
3550 default:
3551 break;
03a93dbb 3552 }
b801d8b2
JF		 3553 }
3554
3555 quit(0);
3556
3557 return 0;
3558}
Full-screen terminal Git browser.