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SIZEOF_REV introduced: 41 bytes of pure madness!
[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);
d720de4b 1268
699ae55b
JF		 1269 assert(view_is_displayed(view));
1270
fe7233c3
JF		 1271 if (view->offset + lineno >= view->lines)
1272 return FALSE;
1273
d720de4b
JF		 1274 line = &view->line[view->offset + lineno];
1275
3c571d67
JF		 1276 if (selected) {
1277 line->selected = TRUE;
d720de4b 1278 view->ops->select(view, line);
3c571d67
JF		 1279 } else if (line->selected) {
1280 line->selected = FALSE;
1281 wmove(view->win, lineno, 0);
1282 wclrtoeol(view->win);
1283 }
d720de4b 1284
5dcf8064 1285 return view->ops->draw(view, line, lineno, selected);
fe7233c3
JF		 1286}
1287
b801d8b2 1288static void
82e78006 1289redraw_view_from(struct view *view, int lineno)
b801d8b2 1290{
82e78006 1291 assert(0 <= lineno && lineno < view->height);
b801d8b2 1292
82e78006 1293 for (; lineno < view->height; lineno++) {
fe7233c3 1294 if (!draw_view_line(view, lineno))
fd85fef1 1295 break;
b801d8b2
JF		 1296 }
1297
1298 redrawwin(view->win);
1299 wrefresh(view->win);
1300}
1301
b76c2afc 1302static void
82e78006
JF		 1303redraw_view(struct view *view)
1304{
1305 wclear(view->win);
1306 redraw_view_from(view, 0);
1307}
1308
c2124ccd 1309
6b161b31 1310static void
81030ec8
JF		 1311update_view_title(struct view *view)
1312{
699ae55b
JF		 1313 assert(view_is_displayed(view));
1314
81030ec8
JF		 1315 if (view == display[current_view])
1316 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1317 else
1318 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1319
1320 werase(view->title);
1321 wmove(view->title, 0, 0);
1322
81030ec8
JF		 1323 if (*view->ref)
1324 wprintw(view->title, "[%s] %s", view->name, view->ref);
1325 else
1326 wprintw(view->title, "[%s]", view->name);
1327
c19f8017 1328 if (view->lines || view->pipe) {
6d9c07af 1329 unsigned int view_lines = view->offset + view->height;
c19f8017 1330 unsigned int lines = view->lines
6d9c07af 1331 ? MIN(view_lines, view->lines) * 100 / view->lines
c19f8017
JF		 1332 : 0;
1333
81030ec8
JF		 1334 wprintw(view->title, " - %s %d of %d (%d%%)",
1335 view->ops->type,
1336 view->lineno + 1,
1337 view->lines,
c19f8017 1338 lines);
81030ec8
JF		 1339 }
1340
f97f4012
JF		 1341 if (view->pipe) {
1342 time_t secs = time(NULL) - view->start_time;
1343
1344 /* Three git seconds are a long time ... */
1345 if (secs > 2)
1346 wprintw(view->title, " %lds", secs);
1347 }
1348
976447f8 1349 wmove(view->title, 0, view->width - 1);
81030ec8
JF		 1350 wrefresh(view->title);
1351}
1352
1353static void
6b161b31 1354resize_display(void)
b76c2afc 1355{
03a93dbb 1356 int offset, i;
6b161b31
JF		 1357 struct view *base = display[0];
1358 struct view *view = display[1] ? display[1] : display[0];
b76c2afc 1359
6b161b31 1360 /* Setup window dimensions */
b76c2afc 1361
03a93dbb 1362 getmaxyx(stdscr, base->height, base->width);
b76c2afc 1363
6b161b31 1364 /* Make room for the status window. */
03a93dbb 1365 base->height -= 1;
6b161b31
JF		 1366
1367 if (view != base) {
03a93dbb
JF		 1368 /* Horizontal split. */
1369 view->width = base->width;
6b161b31
JF		 1370 view->height = SCALE_SPLIT_VIEW(base->height);
1371 base->height -= view->height;
1372
1373 /* Make room for the title bar. */
1374 view->height -= 1;
1375 }
1376
1377 /* Make room for the title bar. */
1378 base->height -= 1;
1379
1380 offset = 0;
1381
33c4f9ea 1382 foreach_displayed_view (view, i) {
b76c2afc 1383 if (!view->win) {
c19f8017 1384 view->win = newwin(view->height, 0, offset, 0);
6b161b31
JF		 1385 if (!view->win)
1386 die("Failed to create %s view", view->name);
1387
1388 scrollok(view->win, TRUE);
1389
1390 view->title = newwin(1, 0, offset + view->height, 0);
1391 if (!view->title)
1392 die("Failed to create title window");
1393
1394 } else {
c19f8017 1395 wresize(view->win, view->height, view->width);
6b161b31
JF		 1396 mvwin(view->win, offset, 0);
1397 mvwin(view->title, offset + view->height, 0);
a28bcc22 1398 }
a28bcc22 1399
6b161b31 1400 offset += view->height + 1;
b76c2afc 1401 }
6b161b31 1402}
b76c2afc 1403
6b161b31 1404static void
20bb5e18
JF		 1405redraw_display(void)
1406{
1407 struct view *view;
1408 int i;
1409
33c4f9ea 1410 foreach_displayed_view (view, i) {
20bb5e18
JF		 1411 redraw_view(view);
1412 update_view_title(view);
1413 }
1414}
1415
85af6284
JF		 1416static void
1417update_display_cursor(void)
1418{
1419 struct view *view = display[current_view];
1420
1421 /* Move the cursor to the right-most column of the cursor line.
1422 *
1423 * XXX: This could turn out to be a bit expensive, but it ensures that
1424 * the cursor does not jump around. */
1425 if (view->lines) {
1426 wmove(view->win, view->lineno - view->offset, view->width - 1);
1427 wrefresh(view->win);
1428 }
1429}
20bb5e18 1430
2e8488b4
JF		 1431/*
1432 * Navigation
1433 */
1434
4a2909a7 1435/* Scrolling backend */
b801d8b2 1436static void
8c317212 1437do_scroll_view(struct view *view, int lines)
b801d8b2 1438{
a0087dd5
JF		 1439 bool redraw_current_line = FALSE;
1440
fd85fef1
JF		 1441 /* The rendering expects the new offset. */
1442 view->offset += lines;
1443
1444 assert(0 <= view->offset && view->offset < view->lines);
1445 assert(lines);
b801d8b2 1446
a0087dd5
JF		 1447 /* Move current line into the view. */
1448 if (view->lineno < view->offset) {
1449 view->lineno = view->offset;
1450 redraw_current_line = TRUE;
1451 } else if (view->lineno >= view->offset + view->height) {
1452 view->lineno = view->offset + view->height - 1;
1453 redraw_current_line = TRUE;
1454 }
1455
1456 assert(view->offset <= view->lineno && view->lineno < view->lines);
1457
82e78006 1458 /* Redraw the whole screen if scrolling is pointless. */
4c6fabc2 1459 if (view->height < ABS(lines)) {
b76c2afc
JF		 1460 redraw_view(view);
1461
1462 } else {
22f66b0a 1463 int line = lines > 0 ? view->height - lines : 0;
82e78006 1464 int end = line + ABS(lines);
fd85fef1
JF		 1465
1466 wscrl(view->win, lines);
1467
22f66b0a 1468 for (; line < end; line++) {
fe7233c3 1469 if (!draw_view_line(view, line))
fd85fef1
JF		 1470 break;
1471 }
fd85fef1 1472
a0087dd5
JF		 1473 if (redraw_current_line)
1474 draw_view_line(view, view->lineno - view->offset);
fd85fef1
JF		 1475 }
1476
fd85fef1
JF		 1477 redrawwin(view->win);
1478 wrefresh(view->win);
9d3f5834 1479 report("");
fd85fef1 1480}
78c70acd 1481
4a2909a7 1482/* Scroll frontend */
fd85fef1 1483static void
6b161b31 1484scroll_view(struct view *view, enum request request)
fd85fef1
JF		 1485{
1486 int lines = 1;
b801d8b2 1487
8c317212
JF		 1488 assert(view_is_displayed(view));
1489
b801d8b2 1490 switch (request) {
4a2909a7 1491 case REQ_SCROLL_PAGE_DOWN:
fd85fef1 1492 lines = view->height;
4a2909a7 1493 case REQ_SCROLL_LINE_DOWN:
b801d8b2 1494 if (view->offset + lines > view->lines)
bde3653a 1495 lines = view->lines - view->offset;
b801d8b2 1496
fd85fef1 1497 if (lines == 0 || view->offset + view->height >= view->lines) {
eb98559e 1498 report("Cannot scroll beyond the last line");
b801d8b2
JF		 1499 return;
1500 }
1501 break;
1502
4a2909a7 1503 case REQ_SCROLL_PAGE_UP:
fd85fef1 1504 lines = view->height;
4a2909a7 1505 case REQ_SCROLL_LINE_UP:
b801d8b2
JF		 1506 if (lines > view->offset)
1507 lines = view->offset;
1508
1509 if (lines == 0) {
eb98559e 1510 report("Cannot scroll beyond the first line");
b801d8b2
JF		 1511 return;
1512 }
1513
fd85fef1 1514 lines = -lines;
b801d8b2 1515 break;
03a93dbb 1516
6b161b31
JF		 1517 default:
1518 die("request %d not handled in switch", request);
b801d8b2
JF		 1519 }
1520
8c317212 1521 do_scroll_view(view, lines);
fd85fef1 1522}
b801d8b2 1523
4a2909a7 1524/* Cursor moving */
fd85fef1 1525static void
8522ecc7 1526move_view(struct view *view, enum request request)
fd85fef1 1527{
dfaa6c81 1528 int scroll_steps = 0;
fd85fef1 1529 int steps;
b801d8b2 1530
fd85fef1 1531 switch (request) {
4a2909a7 1532 case REQ_MOVE_FIRST_LINE:
78c70acd
JF		 1533 steps = -view->lineno;
1534 break;
1535
4a2909a7 1536 case REQ_MOVE_LAST_LINE:
78c70acd
JF		 1537 steps = view->lines - view->lineno - 1;
1538 break;
1539
4a2909a7 1540 case REQ_MOVE_PAGE_UP:
78c70acd
JF		 1541 steps = view->height > view->lineno
1542 ? -view->lineno : -view->height;
1543 break;
1544
4a2909a7 1545 case REQ_MOVE_PAGE_DOWN:
78c70acd
JF		 1546 steps = view->lineno + view->height >= view->lines
1547 ? view->lines - view->lineno - 1 : view->height;
1548 break;
1549
4a2909a7 1550 case REQ_MOVE_UP:
fd85fef1
JF		 1551 steps = -1;
1552 break;
b801d8b2 1553
4a2909a7 1554 case REQ_MOVE_DOWN:
fd85fef1
JF		 1555 steps = 1;
1556 break;
6b161b31
JF		 1557
1558 default:
1559 die("request %d not handled in switch", request);
78c70acd 1560 }
b801d8b2 1561
4c6fabc2 1562 if (steps <= 0 && view->lineno == 0) {
eb98559e 1563 report("Cannot move beyond the first line");
78c70acd 1564 return;
b801d8b2 1565
6908bdbd 1566 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
eb98559e 1567 report("Cannot move beyond the last line");
78c70acd 1568 return;
fd85fef1
JF		 1569 }
1570
4c6fabc2 1571 /* Move the current line */
fd85fef1 1572 view->lineno += steps;
4c6fabc2
JF		 1573 assert(0 <= view->lineno && view->lineno < view->lines);
1574
4c6fabc2 1575 /* Check whether the view needs to be scrolled */
fd85fef1
JF		 1576 if (view->lineno < view->offset ||
1577 view->lineno >= view->offset + view->height) {
dfaa6c81 1578 scroll_steps = steps;
fd85fef1 1579 if (steps < 0 && -steps > view->offset) {
dfaa6c81 1580 scroll_steps = -view->offset;
b76c2afc
JF		 1581
1582 } else if (steps > 0) {
1583 if (view->lineno == view->lines - 1 &&
1584 view->lines > view->height) {
dfaa6c81
JF		 1585 scroll_steps = view->lines - view->offset - 1;
1586 if (scroll_steps >= view->height)
1587 scroll_steps -= view->height - 1;
b76c2afc 1588 }
b801d8b2 1589 }
8522ecc7
JF		 1590 }
1591
1592 if (!view_is_displayed(view)) {
1593 view->offset += steps;
1594 view->ops->select(view, &view->line[view->lineno]);
1595 return;
1596 }
1597
1598 /* Repaint the old "current" line if we be scrolling */
1599 if (ABS(steps) < view->height)
1600 draw_view_line(view, view->lineno - steps - view->offset);
1601
dfaa6c81
JF		 1602 if (scroll_steps) {
1603 do_scroll_view(view, scroll_steps);
fd85fef1 1604 return;
b801d8b2
JF		 1605 }
1606
4c6fabc2 1607 /* Draw the current line */
fe7233c3 1608 draw_view_line(view, view->lineno - view->offset);
fd85fef1 1609
b801d8b2
JF		 1610 redrawwin(view->win);
1611 wrefresh(view->win);
9d3f5834 1612 report("");
b801d8b2
JF		 1613}
1614
b801d8b2 1615
2e8488b4 1616/*
4af34daa
JF		 1617 * Searching
1618 */
1619
c02d8fce 1620static void search_view(struct view *view, enum request request);
4af34daa
JF		 1621
1622static bool
1623find_next_line(struct view *view, unsigned long lineno, struct line *line)
1624{
699ae55b
JF		 1625 assert(view_is_displayed(view));
1626
4af34daa
JF		 1627 if (!view->ops->grep(view, line))
1628 return FALSE;
1629
1630 if (lineno - view->offset >= view->height) {
1631 view->offset = lineno;
1632 view->lineno = lineno;
1633 redraw_view(view);
1634
1635 } else {
1636 unsigned long old_lineno = view->lineno - view->offset;
1637
1638 view->lineno = lineno;
4af34daa
JF		 1639 draw_view_line(view, old_lineno);
1640
1641 draw_view_line(view, view->lineno - view->offset);
1642 redrawwin(view->win);
1643 wrefresh(view->win);
1644 }
1645
1646 report("Line %ld matches '%s'", lineno + 1, view->grep);
1647 return TRUE;
1648}
1649
1650static void
1651find_next(struct view *view, enum request request)
1652{
1653 unsigned long lineno = view->lineno;
1654 int direction;
1655
1656 if (!*view->grep) {
1657 if (!*opt_search)
1658 report("No previous search");
1659 else
c02d8fce 1660 search_view(view, request);
4af34daa
JF		 1661 return;
1662 }
1663
1664 switch (request) {
1665 case REQ_SEARCH:
1666 case REQ_FIND_NEXT:
1667 direction = 1;
1668 break;
1669
1670 case REQ_SEARCH_BACK:
1671 case REQ_FIND_PREV:
1672 direction = -1;
1673 break;
1674
1675 default:
1676 return;
1677 }
1678
1679 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1680 lineno += direction;
1681
1682 /* Note, lineno is unsigned long so will wrap around in which case it
1683 * will become bigger than view->lines. */
1684 for (; lineno < view->lines; lineno += direction) {
1685 struct line *line = &view->line[lineno];
1686
1687 if (find_next_line(view, lineno, line))
1688 return;
1689 }
1690
1691 report("No match found for '%s'", view->grep);
1692}
1693
1694static void
c02d8fce 1695search_view(struct view *view, enum request request)
4af34daa
JF		 1696{
1697 int regex_err;
1698
b77b2cb8
JF		 1699 if (view->regex) {
1700 regfree(view->regex);
4af34daa 1701 *view->grep = 0;
b77b2cb8
JF		 1702 } else {
1703 view->regex = calloc(1, sizeof(*view->regex));
1704 if (!view->regex)
1705 return;
4af34daa
JF		 1706 }
1707
c02d8fce 1708 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
4af34daa
JF		 1709 if (regex_err != 0) {
1710 char buf[SIZEOF_STR] = "unknown error";
1711
b77b2cb8 1712 regerror(regex_err, view->regex, buf, sizeof(buf));
e9cacd58 1713 report("Search failed: %s", buf);
4af34daa
JF		 1714 return;
1715 }
1716
c02d8fce 1717 string_copy(view->grep, opt_search);
4af34daa
JF		 1718
1719 find_next(view, request);
1720}
1721
1722/*
2e8488b4
JF		 1723 * Incremental updating
1724 */
b801d8b2 1725
199d1288
JF		 1726static void
1727end_update(struct view *view)
1728{
1729 if (!view->pipe)
1730 return;
1731 set_nonblocking_input(FALSE);
1732 if (view->pipe == stdin)
1733 fclose(view->pipe);
1734 else
1735 pclose(view->pipe);
1736 view->pipe = NULL;
1737}
1738
03a93dbb 1739static bool
b801d8b2
JF		 1740begin_update(struct view *view)
1741{
4685845e 1742 const char *id = view->id;
fd85fef1 1743
199d1288
JF		 1744 if (view->pipe)
1745 end_update(view);
1746
03a93dbb
JF		 1747 if (opt_cmd[0]) {
1748 string_copy(view->cmd, opt_cmd);
1749 opt_cmd[0] = 0;
8855ada4
JF		 1750 /* When running random commands, the view ref could have become
1751 * invalid so clear it. */
1752 view->ref[0] = 0;
e733ee54
JF		 1753
1754 } else if (view == VIEW(REQ_VIEW_TREE)) {
1755 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1756
1757 if (strcmp(view->vid, view->id))
1758 opt_path[0] = 0;
1759
4ea4ce91 1760 if (!string_format(view->cmd, format, id, opt_path))
e733ee54
JF		 1761 return FALSE;
1762
03a93dbb 1763 } else {
4685845e 1764 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1ba2ae4b 1765
cc2d1364 1766 if (!string_format(view->cmd, format, id, id, id, id, id))
03a93dbb
JF		 1767 return FALSE;
1768 }
b801d8b2 1769
6908bdbd
JF		 1770 /* Special case for the pager view. */
1771 if (opt_pipe) {
1772 view->pipe = opt_pipe;
1773 opt_pipe = NULL;
1774 } else {
1775 view->pipe = popen(view->cmd, "r");
1776 }
1777
2e8488b4
JF		 1778 if (!view->pipe)
1779 return FALSE;
b801d8b2 1780
6b161b31 1781 set_nonblocking_input(TRUE);
b801d8b2
JF		 1782
1783 view->offset = 0;
1784 view->lines = 0;
1785 view->lineno = 0;
49f2b43f 1786 string_copy(view->vid, id);
b801d8b2 1787
2e8488b4
JF		 1788 if (view->line) {
1789 int i;
1790
1791 for (i = 0; i < view->lines; i++)
fe7233c3
JF		 1792 if (view->line[i].data)
1793 free(view->line[i].data);
2e8488b4
JF		 1794
1795 free(view->line);
1796 view->line = NULL;
1797 }
1798
1799 view->start_time = time(NULL);
1800
b801d8b2
JF		 1801 return TRUE;
1802}
1803
e2c01617
JF		 1804static struct line *
1805realloc_lines(struct view *view, size_t line_size)
1806{
1807 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1808
1809 if (!tmp)
1810 return NULL;
1811
1812 view->line = tmp;
1813 view->line_size = line_size;
1814 return view->line;
1815}
1816
03a93dbb 1817static bool
b801d8b2
JF		 1818update_view(struct view *view)
1819{
6b68fd24
JF		 1820 char in_buffer[BUFSIZ];
1821 char out_buffer[BUFSIZ * 2];
b801d8b2 1822 char *line;
82e78006
JF		 1823 /* The number of lines to read. If too low it will cause too much
1824 * redrawing (and possible flickering), if too high responsiveness
1825 * will suffer. */
8855ada4 1826 unsigned long lines = view->height;
82e78006 1827 int redraw_from = -1;
b801d8b2
JF		 1828
1829 if (!view->pipe)
1830 return TRUE;
1831
82e78006
JF		 1832 /* Only redraw if lines are visible. */
1833 if (view->offset + view->height >= view->lines)
1834 redraw_from = view->lines - view->offset;
b801d8b2 1835
699ae55b 1836 /* FIXME: This is probably not perfect for backgrounded views. */
e2c01617 1837 if (!realloc_lines(view, view->lines + lines))
b801d8b2
JF		 1838 goto alloc_error;
1839
6b68fd24
JF		 1840 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1841 size_t linelen = strlen(line);
b801d8b2 1842
b801d8b2
JF		 1843 if (linelen)
1844 line[linelen - 1] = 0;
1845
6b68fd24
JF		 1846 if (opt_iconv != ICONV_NONE) {
1847 char *inbuf = line;
1848 size_t inlen = linelen;
1849
1850 char *outbuf = out_buffer;
1851 size_t outlen = sizeof(out_buffer);
1852
1853 size_t ret;
1854
1855 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1856 if (ret != (size_t) -1) {
1857 line = out_buffer;
1858 linelen = strlen(out_buffer);
1859 }
1860 }
1861
701e4f5d 1862 if (!view->ops->read(view, line))
b801d8b2 1863 goto alloc_error;
fd85fef1
JF		 1864
1865 if (lines-- == 1)
1866 break;
b801d8b2
JF		 1867 }
1868
8855ada4
JF		 1869 {
1870 int digits;
1871
1872 lines = view->lines;
1873 for (digits = 0; lines; digits++)
1874 lines /= 10;
1875
1876 /* Keep the displayed view in sync with line number scaling. */
1877 if (digits != view->digits) {
1878 view->digits = digits;
1879 redraw_from = 0;
1880 }
1881 }
1882
699ae55b
JF		 1883 if (!view_is_displayed(view))
1884 goto check_pipe;
1885
e733ee54
JF		 1886 if (view == VIEW(REQ_VIEW_TREE)) {
1887 /* Clear the view and redraw everything since the tree sorting
1888 * might have rearranged things. */
1889 redraw_view(view);
1890
1891 } else if (redraw_from >= 0) {
82e78006 1892 /* If this is an incremental update, redraw the previous line
a28bcc22
JF		 1893 * since for commits some members could have changed when
1894 * loading the main view. */
82e78006
JF		 1895 if (redraw_from > 0)
1896 redraw_from--;
1897
1898 /* Incrementally draw avoids flickering. */
1899 redraw_view_from(view, redraw_from);
4c6fabc2 1900 }
b801d8b2 1901
eb98559e
JF		 1902 /* Update the title _after_ the redraw so that if the redraw picks up a
1903 * commit reference in view->ref it'll be available here. */
1904 update_view_title(view);
1905
699ae55b 1906check_pipe:
b801d8b2 1907 if (ferror(view->pipe)) {
03a93dbb 1908 report("Failed to read: %s", strerror(errno));
b801d8b2
JF		 1909 goto end;
1910
1911 } else if (feof(view->pipe)) {
f97f4012 1912 report("");
b801d8b2
JF		 1913 goto end;
1914 }
1915
1916 return TRUE;
1917
1918alloc_error:
2e8488b4 1919 report("Allocation failure");
b801d8b2
JF		 1920
1921end:
1922 end_update(view);
1923 return FALSE;
1924}
1925
79d445ca 1926
e10154d5
JF		 1927/*
1928 * View opening
1929 */
1930
79d445ca
JF		 1931static void open_help_view(struct view *view)
1932{
1933 char buf[BUFSIZ];
1934 int lines = ARRAY_SIZE(req_info) + 2;
1935 int i;
1936
1937 if (view->lines > 0)
1938 return;
1939
1940 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1941 if (!req_info[i].request)
1942 lines++;
1943
1944 view->line = calloc(lines, sizeof(*view->line));
1945 if (!view->line) {
1946 report("Allocation failure");
1947 return;
1948 }
1949
1950 view->ops->read(view, "Quick reference for tig keybindings:");
1951
1952 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1953 char *key;
1954
1955 if (!req_info[i].request) {
1956 view->ops->read(view, "");
1957 view->ops->read(view, req_info[i].help);
1958 continue;
1959 }
1960
1961 key = get_key(req_info[i].request);
1962 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1963 continue;
1964
1965 view->ops->read(view, buf);
1966 }
1967}
1968
49f2b43f
JF		 1969enum open_flags {
1970 OPEN_DEFAULT = 0, /* Use default view switching. */
1971 OPEN_SPLIT = 1, /* Split current view. */
1972 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1973 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1974};
1975
6b161b31 1976static void
49f2b43f 1977open_view(struct view *prev, enum request request, enum open_flags flags)
b801d8b2 1978{
49f2b43f
JF		 1979 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1980 bool split = !!(flags & OPEN_SPLIT);
1981 bool reload = !!(flags & OPEN_RELOAD);
a28bcc22 1982 struct view *view = VIEW(request);
9f41488f 1983 int nviews = displayed_views();
6e950a52 1984 struct view *base_view = display[0];
b801d8b2 1985
49f2b43f 1986 if (view == prev && nviews == 1 && !reload) {
6b161b31
JF		 1987 report("Already in %s view", view->name);
1988 return;
1989 }
b801d8b2 1990
2509b112 1991 if (view == VIEW(REQ_VIEW_HELP)) {
79d445ca 1992 open_help_view(view);
2509b112
JF		 1993
1994 } else if ((reload || strcmp(view->vid, view->id)) &&
1995 !begin_update(view)) {
6b161b31
JF		 1996 report("Failed to load %s view", view->name);
1997 return;
1998 }
a28bcc22 1999
6b161b31 2000 if (split) {
8d741c06 2001 display[1] = view;
6b161b31 2002 if (!backgrounded)
8d741c06 2003 current_view = 1;
6b161b31
JF		 2004 } else {
2005 /* Maximize the current view. */
2006 memset(display, 0, sizeof(display));
2007 current_view = 0;
2008 display[current_view] = view;
a28bcc22 2009 }
b801d8b2 2010
6e950a52
JF		 2011 /* Resize the view when switching between split- and full-screen,
2012 * or when switching between two different full-screen views. */
2013 if (nviews != displayed_views() ||
2014 (nviews == 1 && base_view != display[0]))
a006db63 2015 resize_display();
b801d8b2 2016
a8891802 2017 if (split && prev->lineno - prev->offset >= prev->height) {
03a93dbb 2018 /* Take the title line into account. */
eb98559e 2019 int lines = prev->lineno - prev->offset - prev->height + 1;
03a93dbb
JF		 2020
2021 /* Scroll the view that was split if the current line is
2022 * outside the new limited view. */
8c317212 2023 do_scroll_view(prev, lines);
03a93dbb
JF		 2024 }
2025
6b161b31 2026 if (prev && view != prev) {
9b995f0c 2027 if (split && !backgrounded) {
f0b3ab80
JF		 2028 /* "Blur" the previous view. */
2029 update_view_title(prev);
9f396969 2030 }
f0b3ab80 2031
f6da0b66 2032 view->parent = prev;
b801d8b2
JF		 2033 }
2034
9f396969 2035 if (view->pipe && view->lines == 0) {
03a93dbb
JF		 2036 /* Clear the old view and let the incremental updating refill
2037 * the screen. */
2038 wclear(view->win);
f97f4012 2039 report("");
03a93dbb
JF		 2040 } else {
2041 redraw_view(view);
24b5b3e0 2042 report("");
03a93dbb 2043 }
6706b2ba
JF		 2044
2045 /* If the view is backgrounded the above calls to report()
2046 * won't redraw the view title. */
2047 if (backgrounded)
2048 update_view_title(view);
b801d8b2
JF		 2049}
2050
2051
6b161b31
JF		 2052/*
2053 * User request switch noodle
2054 */
2055
b801d8b2 2056static int
6b161b31 2057view_driver(struct view *view, enum request request)
b801d8b2 2058{
b801d8b2
JF		 2059 int i;
2060
2061 switch (request) {
4a2909a7
JF		 2062 case REQ_MOVE_UP:
2063 case REQ_MOVE_DOWN:
2064 case REQ_MOVE_PAGE_UP:
2065 case REQ_MOVE_PAGE_DOWN:
2066 case REQ_MOVE_FIRST_LINE:
2067 case REQ_MOVE_LAST_LINE:
8522ecc7 2068 move_view(view, request);
fd85fef1
JF		 2069 break;
2070
4a2909a7
JF		 2071 case REQ_SCROLL_LINE_DOWN:
2072 case REQ_SCROLL_LINE_UP:
2073 case REQ_SCROLL_PAGE_DOWN:
2074 case REQ_SCROLL_PAGE_UP:
a28bcc22 2075 scroll_view(view, request);
b801d8b2
JF		 2076 break;
2077
e733ee54
JF		 2078 case REQ_VIEW_BLOB:
2079 if (!ref_blob[0]) {
2080 report("No file chosen, press 't' to open tree view");
2081 break;
2082 }
2083 /* Fall-through */
4a2909a7 2084 case REQ_VIEW_MAIN:
4a2909a7 2085 case REQ_VIEW_DIFF:
2e8488b4 2086 case REQ_VIEW_LOG:
e733ee54 2087 case REQ_VIEW_TREE:
2e8488b4 2088 case REQ_VIEW_HELP:
6908bdbd 2089 case REQ_VIEW_PAGER:
49f2b43f 2090 open_view(view, request, OPEN_DEFAULT);
b801d8b2
JF		 2091 break;
2092
b3a54cba
JF		 2093 case REQ_NEXT:
2094 case REQ_PREVIOUS:
2095 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2096
e733ee54
JF		 2097 if ((view == VIEW(REQ_VIEW_DIFF) &&
2098 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2099 (view == VIEW(REQ_VIEW_BLOB) &&
2100 view->parent == VIEW(REQ_VIEW_TREE))) {
b3a54cba 2101 view = view->parent;
8522ecc7
JF		 2102 move_view(view, request);
2103 if (view_is_displayed(view))
f0b3ab80 2104 update_view_title(view);
b3a54cba 2105 } else {
8522ecc7 2106 move_view(view, request);
b3a54cba
JF		 2107 break;
2108 }
6706b2ba
JF		 2109 /* Fall-through */
2110
6b161b31 2111 case REQ_ENTER:
6908bdbd
JF		 2112 if (!view->lines) {
2113 report("Nothing to enter");
2114 break;
2115 }
fe7233c3 2116 return view->ops->enter(view, &view->line[view->lineno]);
6b161b31 2117
03a93dbb
JF		 2118 case REQ_VIEW_NEXT:
2119 {
9f41488f 2120 int nviews = displayed_views();
03a93dbb
JF		 2121 int next_view = (current_view + 1) % nviews;
2122
2123 if (next_view == current_view) {
2124 report("Only one view is displayed");
2125 break;
2126 }
2127
2128 current_view = next_view;
2129 /* Blur out the title of the previous view. */
2130 update_view_title(view);
6734f6b9 2131 report("");
03a93dbb
JF		 2132 break;
2133 }
24b5b3e0 2134 case REQ_TOGGLE_LINENO:
b76c2afc 2135 opt_line_number = !opt_line_number;
20bb5e18 2136 redraw_display();
b801d8b2
JF		 2137 break;
2138
54efb62b
JF		 2139 case REQ_TOGGLE_REV_GRAPH:
2140 opt_rev_graph = !opt_rev_graph;
2141 redraw_display();
2142 break;
2143
03a93dbb 2144 case REQ_PROMPT:
8855ada4 2145 /* Always reload^Wrerun commands from the prompt. */
49f2b43f 2146 open_view(view, opt_request, OPEN_RELOAD);
03a93dbb
JF		 2147 break;
2148
4af34daa
JF		 2149 case REQ_SEARCH:
2150 case REQ_SEARCH_BACK:
c02d8fce 2151 search_view(view, request);
4af34daa
JF		 2152 break;
2153
2154 case REQ_FIND_NEXT:
2155 case REQ_FIND_PREV:
2156 find_next(view, request);
2157 break;
2158
4a2909a7 2159 case REQ_STOP_LOADING:
59a45d3a
JF		 2160 for (i = 0; i < ARRAY_SIZE(views); i++) {
2161 view = &views[i];
2e8488b4 2162 if (view->pipe)
6a7bb912 2163 report("Stopped loading the %s view", view->name),
03a93dbb
JF		 2164 end_update(view);
2165 }
b801d8b2
JF		 2166 break;
2167
4a2909a7 2168 case REQ_SHOW_VERSION:
6cb291b7 2169 report("%s (built %s)", VERSION, __DATE__);
b801d8b2
JF		 2170 return TRUE;
2171
fac7db6c
JF		 2172 case REQ_SCREEN_RESIZE:
2173 resize_display();
2174 /* Fall-through */
4a2909a7 2175 case REQ_SCREEN_REDRAW:
20bb5e18 2176 redraw_display();
4a2909a7
JF		 2177 break;
2178
1d754561 2179 case REQ_NONE:
b801d8b2
JF		 2180 doupdate();
2181 return TRUE;
2182
4f9b667a 2183 case REQ_VIEW_CLOSE:
2fcf5401
JF		 2184 /* XXX: Mark closed views by letting view->parent point to the
2185 * view itself. Parents to closed view should never be
2186 * followed. */
2187 if (view->parent &&
2188 view->parent->parent != view->parent) {
4f9b667a
JF		 2189 memset(display, 0, sizeof(display));
2190 current_view = 0;
f6da0b66 2191 display[current_view] = view->parent;
2fcf5401 2192 view->parent = view;
4f9b667a
JF		 2193 resize_display();
2194 redraw_display();
2195 break;
2196 }
2197 /* Fall-through */
b801d8b2
JF		 2198 case REQ_QUIT:
2199 return FALSE;
2200
2201 default:
2e8488b4 2202 /* An unknown key will show most commonly used commands. */
468876c9 2203 report("Unknown key, press 'h' for help");
b801d8b2
JF		 2204 return TRUE;
2205 }
2206
2207 return TRUE;
2208}
2209
2210
2211/*
ff26aa29 2212 * Pager backend
b801d8b2
JF		 2213 */
2214
6b161b31 2215static bool
5dcf8064 2216pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
b801d8b2 2217{
fe7233c3
JF		 2218 char *text = line->data;
2219 enum line_type type = line->type;
2220 int textlen = strlen(text);
78c70acd 2221 int attr;
b801d8b2 2222
6706b2ba
JF		 2223 wmove(view->win, lineno, 0);
2224
5dcf8064 2225 if (selected) {
78c70acd 2226 type = LINE_CURSOR;
6706b2ba 2227 wchgat(view->win, -1, 0, type, NULL);
fd85fef1
JF		 2228 }
2229
78c70acd 2230 attr = get_line_attr(type);
b801d8b2 2231 wattrset(view->win, attr);
b76c2afc 2232
6706b2ba
JF		 2233 if (opt_line_number || opt_tab_size < TABSIZE) {
2234 static char spaces[] = " ";
2235 int col_offset = 0, col = 0;
2236
2237 if (opt_line_number) {
2238 unsigned long real_lineno = view->offset + lineno + 1;
82e78006 2239
6706b2ba
JF		 2240 if (real_lineno == 1 ||
2241 (real_lineno % opt_num_interval) == 0) {
2242 wprintw(view->win, "%.*d", view->digits, real_lineno);
8855ada4 2243
6706b2ba
JF		 2244 } else {
2245 waddnstr(view->win, spaces,
2246 MIN(view->digits, STRING_SIZE(spaces)));
2247 }
2248 waddstr(view->win, ": ");
2249 col_offset = view->digits + 2;
2250 }
8855ada4 2251
fe7233c3 2252 while (text && col_offset + col < view->width) {
6706b2ba 2253 int cols_max = view->width - col_offset - col;
fe7233c3 2254 char *pos = text;
6706b2ba 2255 int cols;
4c6fabc2 2256
fe7233c3
JF		 2257 if (*text == '\t') {
2258 text++;
6706b2ba 2259 assert(sizeof(spaces) > TABSIZE);
fe7233c3 2260 pos = spaces;
6706b2ba 2261 cols = opt_tab_size - (col % opt_tab_size);
82e78006 2262
b76c2afc 2263 } else {
fe7233c3
JF		 2264 text = strchr(text, '\t');
2265 cols = line ? text - pos : strlen(pos);
b76c2afc 2266 }
6706b2ba 2267
fe7233c3 2268 waddnstr(view->win, pos, MIN(cols, cols_max));
6706b2ba 2269 col += cols;
b76c2afc 2270 }
b76c2afc
JF		 2271
2272 } else {
6706b2ba 2273 int col = 0, pos = 0;
b801d8b2 2274
fe7233c3
JF		 2275 for (; pos < textlen && col < view->width; pos++, col++)
2276 if (text[pos] == '\t')
6706b2ba
JF		 2277 col += TABSIZE - (col % TABSIZE) - 1;
2278
fe7233c3 2279 waddnstr(view->win, text, pos);
6706b2ba 2280 }
2e8488b4 2281
b801d8b2
JF		 2282 return TRUE;
2283}
2284
dc23c0e3 2285static bool
d65ced0d 2286add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
dc23c0e3 2287{
17482b11 2288 char refbuf[SIZEOF_STR];
dc23c0e3
JF		 2289 char *ref = NULL;
2290 FILE *pipe;
2291
2292 if (!string_format(refbuf, "git describe %s", commit_id))
2293 return TRUE;
2294
2295 pipe = popen(refbuf, "r");
2296 if (!pipe)
2297 return TRUE;
2298
2299 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2300 ref = chomp_string(ref);
2301 pclose(pipe);
2302
2303 if (!ref || !*ref)
2304 return TRUE;
2305
2306 /* This is the only fatal call, since it can "corrupt" the buffer. */
17482b11 2307 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
dc23c0e3
JF		 2308 return FALSE;
2309
2310 return TRUE;
2311}
2312
7b99a34c
JF		 2313static void
2314add_pager_refs(struct view *view, struct line *line)
2315{
17482b11 2316 char buf[SIZEOF_STR];
c9ca1ec3 2317 char *commit_id = line->data + STRING_SIZE("commit ");
7b99a34c 2318 struct ref **refs;
d65ced0d 2319 size_t bufpos = 0, refpos = 0;
7b99a34c 2320 const char *sep = "Refs: ";
dc23c0e3 2321 bool is_tag = FALSE;
7b99a34c
JF		 2322
2323 assert(line->type == LINE_COMMIT);
2324
c9ca1ec3 2325 refs = get_refs(commit_id);
dc23c0e3
JF		 2326 if (!refs) {
2327 if (view == VIEW(REQ_VIEW_DIFF))
2328 goto try_add_describe_ref;
7b99a34c 2329 return;
dc23c0e3 2330 }
7b99a34c
JF		 2331
2332 do {
cc2d1364
JF		 2333 struct ref *ref = refs[refpos];
2334 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
7b99a34c 2335
cc2d1364
JF		 2336 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2337 return;
7b99a34c 2338 sep = ", ";
dc23c0e3
JF		 2339 if (ref->tag)
2340 is_tag = TRUE;
7b99a34c
JF		 2341 } while (refs[refpos++]->next);
2342
dc23c0e3
JF		 2343 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2344try_add_describe_ref:
d42c8a35 2345 /* Add <tag>-g<commit_id> "fake" reference. */
dc23c0e3
JF		 2346 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2347 return;
2348 }
2349
d42c8a35
JF		 2350 if (bufpos == 0)
2351 return;
2352
cc2d1364 2353 if (!realloc_lines(view, view->line_size + 1))
7b99a34c
JF		 2354 return;
2355
2356 line = &view->line[view->lines];
2357 line->data = strdup(buf);
2358 if (!line->data)
2359 return;
2360
2361 line->type = LINE_PP_REFS;
2362 view->lines++;
2363}
2364
6b161b31 2365static bool
701e4f5d 2366pager_read(struct view *view, char *data)
22f66b0a 2367{
7b99a34c 2368 struct line *line = &view->line[view->lines];
22f66b0a 2369
7b99a34c
JF		 2370 line->data = strdup(data);
2371 if (!line->data)
2372 return FALSE;
fe7233c3 2373
7b99a34c 2374 line->type = get_line_type(line->data);
22f66b0a 2375 view->lines++;
7b99a34c
JF		 2376
2377 if (line->type == LINE_COMMIT &&
2378 (view == VIEW(REQ_VIEW_DIFF) ||
2379 view == VIEW(REQ_VIEW_LOG)))
2380 add_pager_refs(view, line);
2381
22f66b0a
JF		 2382 return TRUE;
2383}
2384
6b161b31 2385static bool
fe7233c3 2386pager_enter(struct view *view, struct line *line)
6b161b31 2387{
91e8e277 2388 int split = 0;
6b161b31 2389
9fbbd28f
JF		 2390 if (line->type == LINE_COMMIT &&
2391 (view == VIEW(REQ_VIEW_LOG) ||
2392 view == VIEW(REQ_VIEW_PAGER))) {
91e8e277
JF		 2393 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2394 split = 1;
67e48ac5
JF		 2395 }
2396
91e8e277
JF		 2397 /* Always scroll the view even if it was split. That way
2398 * you can use Enter to scroll through the log view and
2399 * split open each commit diff. */
2400 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2401
2402 /* FIXME: A minor workaround. Scrolling the view will call report("")
9d82d824
JF		 2403 * but if we are scrolling a non-current view this won't properly
2404 * update the view title. */
91e8e277
JF		 2405 if (split)
2406 update_view_title(view);
6b161b31
JF		 2407
2408 return TRUE;
2409}
2410
4af34daa
JF		 2411static bool
2412pager_grep(struct view *view, struct line *line)
2413{
2414 regmatch_t pmatch;
2415 char *text = line->data;
2416
2417 if (!*text)
2418 return FALSE;
2419
b77b2cb8 2420 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
4af34daa
JF		 2421 return FALSE;
2422
2423 return TRUE;
2424}
2425
d720de4b
JF		 2426static void
2427pager_select(struct view *view, struct line *line)
2428{
2429 if (line->type == LINE_COMMIT) {
2430 char *text = line->data;
2431
5dcf8064 2432 string_copy(view->ref, text + STRING_SIZE("commit "));
d720de4b
JF		 2433 string_copy(ref_commit, view->ref);
2434 }
2435}
2436
6b161b31 2437static struct view_ops pager_ops = {
6734f6b9 2438 "line",
6b161b31
JF		 2439 pager_draw,
2440 pager_read,
2441 pager_enter,
4af34daa 2442 pager_grep,
d720de4b 2443 pager_select,
6b161b31
JF		 2444};
2445
80ce96ea 2446
ff26aa29 2447/*
e733ee54
JF		 2448 * Tree backend
2449 */
2450
4795d620 2451/* Parse output from git-ls-tree(1):
e733ee54
JF		 2452 *
2453 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2454 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2455 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2456 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2457 */
2458
2459#define SIZEOF_TREE_ATTR \
2460 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2461
2462#define TREE_UP_FORMAT "040000 tree %s\t.."
2463
2464static int
2465tree_compare_entry(enum line_type type1, char *name1,
2466 enum line_type type2, char *name2)
2467{
2468 if (type1 != type2) {
2469 if (type1 == LINE_TREE_DIR)
2470 return -1;
2471 return 1;
2472 }
2473
2474 return strcmp(name1, name2);
2475}
2476
2477static bool
2478tree_read(struct view *view, char *text)
2479{
2480 size_t textlen = strlen(text);
2481 char buf[SIZEOF_STR];
2482 unsigned long pos;
2483 enum line_type type;
f88a5319 2484 bool first_read = view->lines == 0;
e733ee54
JF		 2485
2486 if (textlen <= SIZEOF_TREE_ATTR)
2487 return FALSE;
2488
2489 type = text[STRING_SIZE("100644 ")] == 't'
2490 ? LINE_TREE_DIR : LINE_TREE_FILE;
2491
f88a5319 2492 if (first_read) {
e733ee54 2493 /* Add path info line */
4ea4ce91 2494 if (string_format(buf, "Directory path /%s", opt_path) &&
e733ee54
JF		 2495 realloc_lines(view, view->line_size + 1) &&
2496 pager_read(view, buf))
2497 view->line[view->lines - 1].type = LINE_DEFAULT;
2498 else
2499 return FALSE;
2500
2501 /* Insert "link" to parent directory. */
2502 if (*opt_path &&
4ea4ce91 2503 string_format(buf, TREE_UP_FORMAT, view->ref) &&
e733ee54
JF		 2504 realloc_lines(view, view->line_size + 1) &&
2505 pager_read(view, buf))
2506 view->line[view->lines - 1].type = LINE_TREE_DIR;
2507 else if (*opt_path)
2508 return FALSE;
2509 }
2510
2511 /* Strip the path part ... */
2512 if (*opt_path) {
2513 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2514 size_t striplen = strlen(opt_path);
2515 char *path = text + SIZEOF_TREE_ATTR;
2516
2517 if (pathlen > striplen)
2518 memmove(path, path + striplen,
2519 pathlen - striplen + 1);
2520 }
2521
2522 /* Skip "Directory ..." and ".." line. */
2523 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2524 struct line *line = &view->line[pos];
2525 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2526 char *path2 = text + SIZEOF_TREE_ATTR;
2527 int cmp = tree_compare_entry(line->type, path1, type, path2);
2528
2529 if (cmp <= 0)
2530 continue;
2531
2532 text = strdup(text);
2533 if (!text)
2534 return FALSE;
2535
2536 if (view->lines > pos)
2537 memmove(&view->line[pos + 1], &view->line[pos],
2538 (view->lines - pos) * sizeof(*line));
2539
2540 line = &view->line[pos];
2541 line->data = text;
2542 line->type = type;
2543 view->lines++;
2544 return TRUE;
2545 }
2546
2547 if (!pager_read(view, text))
2548 return FALSE;
2549
f88a5319
JF		 2550 /* Move the current line to the first tree entry. */
2551 if (first_read)
2552 view->lineno++;
2553
e733ee54
JF		 2554 view->line[view->lines - 1].type = type;
2555 return TRUE;
2556}
2557
2558static bool
2559tree_enter(struct view *view, struct line *line)
2560{
2b42e5d6 2561 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
e733ee54
JF		 2562 enum request request;
2563
2564 switch (line->type) {
2565 case LINE_TREE_DIR:
2566 /* Depending on whether it is a subdir or parent (updir?) link
2567 * mangle the path buffer. */
2568 if (line == &view->line[1] && *opt_path) {
2569 size_t path_len = strlen(opt_path);
2570 char *dirsep = opt_path + path_len - 1;
2571
2572 while (dirsep > opt_path && dirsep[-1] != '/')
2573 dirsep--;
2574
2575 dirsep[0] = 0;
2576
2577 } else {
d65ced0d 2578 size_t pathlen = strlen(opt_path);
4ea4ce91 2579 size_t origlen = pathlen;
4795d620 2580 char *data = line->data;
e733ee54
JF		 2581 char *basename = data + SIZEOF_TREE_ATTR;
2582
4038038f 2583 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
4ea4ce91
JF		 2584 opt_path[origlen] = 0;
2585 return TRUE;
2586 }
e733ee54
JF		 2587 }
2588
2589 /* Trees and subtrees share the same ID, so they are not not
2590 * unique like blobs. */
2591 flags |= OPEN_RELOAD;
2592 request = REQ_VIEW_TREE;
2593 break;
2594
2595 case LINE_TREE_FILE:
e733ee54
JF		 2596 request = REQ_VIEW_BLOB;
2597 break;
2598
2599 default:
2600 return TRUE;
2601 }
2602
2603 open_view(view, request, flags);
2604
e733ee54
JF		 2605 return TRUE;
2606}
2607
d720de4b
JF		 2608static void
2609tree_select(struct view *view, struct line *line)
2610{
73c76ef5
JF		 2611 char *text = line->data;
2612
2613 text += STRING_SIZE("100644 blob ");
2614
2615 if (line->type == LINE_TREE_FILE) {
2616 string_ncopy(ref_blob, text, 40);
2617 /* Also update the blob view's ref, since all there must always
2618 * be in sync. */
2619 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
d720de4b 2620
ebbaf4fe
JF		 2621 } else if (line->type != LINE_TREE_DIR) {
2622 return;
d720de4b 2623 }
ebbaf4fe
JF		 2624
2625 string_ncopy(view->ref, text, 40);
d720de4b
JF		 2626}
2627
e733ee54
JF		 2628static struct view_ops tree_ops = {
2629 "file",
2630 pager_draw,
2631 tree_read,
2632 tree_enter,
2633 pager_grep,
d720de4b 2634 tree_select,
e733ee54
JF		 2635};
2636
2637static bool
2638blob_read(struct view *view, char *line)
2639{
2640 bool state = pager_read(view, line);
2641
2642 if (state == TRUE)
2643 view->line[view->lines - 1].type = LINE_DEFAULT;
2644
2645 return state;
2646}
2647
2648static struct view_ops blob_ops = {
2649 "line",
2650 pager_draw,
2651 blob_read,
2652 pager_enter,
2653 pager_grep,
d720de4b 2654 pager_select,
e733ee54
JF		 2655};
2656
2657
2658/*
ff26aa29
JF		 2659 * Main view backend
2660 */
2661
2662struct commit {
10446330 2663 char id[SIZEOF_REV]; /* SHA1 ID. */
54efb62b
JF		 2664 char title[75]; /* First line of the commit message. */
2665 char author[75]; /* Author of the commit. */
2666 struct tm time; /* Date from the author ident. */
2667 struct ref **refs; /* Repository references. */
2668 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2669 size_t graph_size; /* The width of the graph array. */
ff26aa29 2670};
c34d9c9f 2671
6b161b31 2672static bool
5dcf8064 2673main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
22f66b0a 2674{
2e8488b4 2675 char buf[DATE_COLS + 1];
fe7233c3 2676 struct commit *commit = line->data;
78c70acd 2677 enum line_type type;
6706b2ba 2678 int col = 0;
b76c2afc 2679 size_t timelen;
10e290ee 2680 size_t authorlen;
9989bf60 2681 int trimmed = 1;
22f66b0a 2682
4c6fabc2
JF		 2683 if (!*commit->author)
2684 return FALSE;
22f66b0a 2685
6706b2ba
JF		 2686 wmove(view->win, lineno, col);
2687
5dcf8064 2688 if (selected) {
78c70acd 2689 type = LINE_CURSOR;
6706b2ba
JF		 2690 wattrset(view->win, get_line_attr(type));
2691 wchgat(view->win, -1, 0, type, NULL);
2692
78c70acd 2693 } else {
b76c2afc 2694 type = LINE_MAIN_COMMIT;
6706b2ba 2695 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
b76c2afc
JF		 2696 }
2697
4c6fabc2 2698 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
b76c2afc 2699 waddnstr(view->win, buf, timelen);
4c6fabc2 2700 waddstr(view->win, " ");
b76c2afc 2701
6706b2ba
JF		 2702 col += DATE_COLS;
2703 wmove(view->win, lineno, col);
2704 if (type != LINE_CURSOR)
2705 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
b76c2afc 2706
9989bf60
JF		 2707 if (opt_utf8) {
2708 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2709 } else {
2710 authorlen = strlen(commit->author);
2711 if (authorlen > AUTHOR_COLS - 2) {
2712 authorlen = AUTHOR_COLS - 2;
2713 trimmed = 1;
2714 }
2715 }
10e290ee
JF		 2716
2717 if (trimmed) {
2718 waddnstr(view->win, commit->author, authorlen);
6706b2ba
JF		 2719 if (type != LINE_CURSOR)
2720 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
b76c2afc
JF		 2721 waddch(view->win, '~');
2722 } else {
2723 waddstr(view->win, commit->author);
22f66b0a
JF		 2724 }
2725
10e290ee 2726 col += AUTHOR_COLS;
6706b2ba
JF		 2727 if (type != LINE_CURSOR)
2728 wattrset(view->win, A_NORMAL);
2729
54efb62b
JF		 2730 if (opt_rev_graph && commit->graph_size) {
2731 size_t i;
2732
2733 wmove(view->win, lineno, col);
2734 /* Using waddch() instead of waddnstr() ensures that
2735 * they'll be rendered correctly for the cursor line. */
2736 for (i = 0; i < commit->graph_size; i++)
2737 waddch(view->win, commit->graph[i]);
2738
2739 col += commit->graph_size + 1;
2740 }
2741
2742 wmove(view->win, lineno, col);
c34d9c9f
JF		 2743
2744 if (commit->refs) {
2745 size_t i = 0;
2746
2747 do {
6706b2ba
JF		 2748 if (type == LINE_CURSOR)
2749 ;
2750 else if (commit->refs[i]->tag)
c34d9c9f
JF		 2751 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2752 else
2753 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2754 waddstr(view->win, "[");
2755 waddstr(view->win, commit->refs[i]->name);
2756 waddstr(view->win, "]");
6706b2ba
JF		 2757 if (type != LINE_CURSOR)
2758 wattrset(view->win, A_NORMAL);
c34d9c9f 2759 waddstr(view->win, " ");
6706b2ba 2760 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
c34d9c9f
JF		 2761 } while (commit->refs[i++]->next);
2762 }
2763
6706b2ba
JF		 2764 if (type != LINE_CURSOR)
2765 wattrset(view->win, get_line_attr(type));
2766
2767 {
2768 int titlelen = strlen(commit->title);
2769
2770 if (col + titlelen > view->width)
2771 titlelen = view->width - col;
2772
2773 waddnstr(view->win, commit->title, titlelen);
2774 }
22f66b0a
JF		 2775
2776 return TRUE;
2777}
2778
4c6fabc2 2779/* Reads git log --pretty=raw output and parses it into the commit struct. */
6b161b31 2780static bool
701e4f5d 2781main_read(struct view *view, char *line)
22f66b0a 2782{
78c70acd 2783 enum line_type type = get_line_type(line);
701e4f5d
JF		 2784 struct commit *commit = view->lines
2785 ? view->line[view->lines - 1].data : NULL;
22f66b0a 2786
78c70acd
JF		 2787 switch (type) {
2788 case LINE_COMMIT:
22f66b0a
JF		 2789 commit = calloc(1, sizeof(struct commit));
2790 if (!commit)
2791 return FALSE;
2792
4c6fabc2 2793 line += STRING_SIZE("commit ");
b76c2afc 2794
fe7233c3 2795 view->line[view->lines++].data = commit;
82e78006 2796 string_copy(commit->id, line);
c34d9c9f 2797 commit->refs = get_refs(commit->id);
54efb62b 2798 commit->graph[commit->graph_size++] = ACS_LTEE;
78c70acd 2799 break;
22f66b0a 2800
8855ada4 2801 case LINE_AUTHOR:
b76c2afc 2802 {
4c6fabc2 2803 char *ident = line + STRING_SIZE("author ");
b76c2afc
JF		 2804 char *end = strchr(ident, '<');
2805
701e4f5d 2806 if (!commit)
fe7233c3
JF		 2807 break;
2808
b76c2afc 2809 if (end) {
cbbf2d1b
JF		 2810 char *email = end + 1;
2811
b76c2afc 2812 for (; end > ident && isspace(end[-1]); end--) ;
cbbf2d1b
JF		 2813
2814 if (end == ident && *email) {
2815 ident = email;
2816 end = strchr(ident, '>');
2817 for (; end > ident && isspace(end[-1]); end--) ;
2818 }
b76c2afc
JF		 2819 *end = 0;
2820 }
2821
cbbf2d1b
JF		 2822 /* End is NULL or ident meaning there's no author. */
2823 if (end <= ident)
2824 ident = "Unknown";
2825
82e78006 2826 string_copy(commit->author, ident);
b76c2afc 2827
4c6fabc2 2828 /* Parse epoch and timezone */
b76c2afc
JF		 2829 if (end) {
2830 char *secs = strchr(end + 1, '>');
2831 char *zone;
2832 time_t time;
2833
2834 if (!secs || secs[1] != ' ')
2835 break;
2836
2837 secs += 2;
2838 time = (time_t) atol(secs);
2839 zone = strchr(secs, ' ');
4c6fabc2 2840 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
b76c2afc
JF		 2841 long tz;
2842
2843 zone++;
2844 tz = ('0' - zone[1]) * 60 * 60 * 10;
2845 tz += ('0' - zone[2]) * 60 * 60;
2846 tz += ('0' - zone[3]) * 60;
2847 tz += ('0' - zone[4]) * 60;
2848
2849 if (zone[0] == '-')
2850 tz = -tz;
2851
2852 time -= tz;
2853 }
2854 gmtime_r(&time, &commit->time);
2855 }
2856 break;
2857 }
78c70acd 2858 default:
701e4f5d 2859 if (!commit)
2e8488b4
JF		 2860 break;
2861
2862 /* Fill in the commit title if it has not already been set. */
2e8488b4
JF		 2863 if (commit->title[0])
2864 break;
2865
2866 /* Require titles to start with a non-space character at the
2867 * offset used by git log. */
eb98559e
JF		 2868 /* FIXME: More gracefull handling of titles; append "..." to
2869 * shortened titles, etc. */
2e8488b4 2870 if (strncmp(line, " ", 4) ||
eb98559e 2871 isspace(line[4]))
82e78006
JF		 2872 break;
2873
2874 string_copy(commit->title, line + 4);
22f66b0a
JF		 2875 }
2876
2877 return TRUE;
2878}
2879
6b161b31 2880static bool
fe7233c3 2881main_enter(struct view *view, struct line *line)
b801d8b2 2882{
b3a54cba
JF		 2883 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2884
2885 open_view(view, REQ_VIEW_DIFF, flags);
6b161b31 2886 return TRUE;
b801d8b2
JF		 2887}
2888
4af34daa
JF		 2889static bool
2890main_grep(struct view *view, struct line *line)
2891{
2892 struct commit *commit = line->data;
2893 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2894 char buf[DATE_COLS + 1];
2895 regmatch_t pmatch;
2896
2897 for (state = S_TITLE; state < S_END; state++) {
2898 char *text;
2899
2900 switch (state) {
2901 case S_TITLE: text = commit->title; break;
2902 case S_AUTHOR: text = commit->author; break;
2903 case S_DATE:
2904 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2905 continue;
2906 text = buf;
2907 break;
2908
2909 default:
2910 return FALSE;
2911 }
2912
b77b2cb8 2913 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4af34daa
JF		 2914 return TRUE;
2915 }
2916
2917 return FALSE;
2918}
2919
d720de4b
JF		 2920static void
2921main_select(struct view *view, struct line *line)
2922{
2923 struct commit *commit = line->data;
2924
2925 string_copy(view->ref, commit->id);
2926 string_copy(ref_commit, view->ref);
2927}
2928
6b161b31 2929static struct view_ops main_ops = {
6734f6b9 2930 "commit",
6b161b31
JF		 2931 main_draw,
2932 main_read,
2933 main_enter,
4af34daa 2934 main_grep,
d720de4b 2935 main_select,
6b161b31 2936};
2e8488b4 2937
c34d9c9f 2938
6b161b31 2939/*
10e290ee
JF		 2940 * Unicode / UTF-8 handling
2941 *
2942 * NOTE: Much of the following code for dealing with unicode is derived from
2943 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2944 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2945 */
2946
2947/* I've (over)annotated a lot of code snippets because I am not entirely
2948 * confident that the approach taken by this small UTF-8 interface is correct.
2949 * --jonas */
2950
2951static inline int
2952unicode_width(unsigned long c)
2953{
2954 if (c >= 0x1100 &&
2955 (c <= 0x115f /* Hangul Jamo */
2956 || c == 0x2329
2957 || c == 0x232a
2958 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
f97f4012 2959 /* CJK ... Yi */
10e290ee
JF		 2960 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2961 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2962 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2963 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2964 || (c >= 0xffe0 && c <= 0xffe6)
2965 || (c >= 0x20000 && c <= 0x2fffd)
2966 || (c >= 0x30000 && c <= 0x3fffd)))
2967 return 2;
2968
2969 return 1;
2970}
2971
2972/* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2973 * Illegal bytes are set one. */
2974static const unsigned char utf8_bytes[256] = {
2975 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,
2976 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,
2977 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,
2978 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,
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 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,
2982 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,
2983};
2984
2985/* Decode UTF-8 multi-byte representation into a unicode character. */
2986static inline unsigned long
2987utf8_to_unicode(const char *string, size_t length)
2988{
2989 unsigned long unicode;
2990
2991 switch (length) {
2992 case 1:
2993 unicode = string[0];
2994 break;
2995 case 2:
2996 unicode = (string[0] & 0x1f) << 6;
2997 unicode += (string[1] & 0x3f);
2998 break;
2999 case 3:
3000 unicode = (string[0] & 0x0f) << 12;
3001 unicode += ((string[1] & 0x3f) << 6);
3002 unicode += (string[2] & 0x3f);
3003 break;
3004 case 4:
3005 unicode = (string[0] & 0x0f) << 18;
3006 unicode += ((string[1] & 0x3f) << 12);
3007 unicode += ((string[2] & 0x3f) << 6);
3008 unicode += (string[3] & 0x3f);
3009 break;
3010 case 5:
3011 unicode = (string[0] & 0x0f) << 24;
3012 unicode += ((string[1] & 0x3f) << 18);
3013 unicode += ((string[2] & 0x3f) << 12);
3014 unicode += ((string[3] & 0x3f) << 6);
3015 unicode += (string[4] & 0x3f);
3016 break;
68b6e0eb 3017 case 6:
10e290ee
JF		 3018 unicode = (string[0] & 0x01) << 30;
3019 unicode += ((string[1] & 0x3f) << 24);
3020 unicode += ((string[2] & 0x3f) << 18);
3021 unicode += ((string[3] & 0x3f) << 12);
3022 unicode += ((string[4] & 0x3f) << 6);
3023 unicode += (string[5] & 0x3f);
3024 break;
3025 default:
3026 die("Invalid unicode length");
3027 }
3028
3029 /* Invalid characters could return the special 0xfffd value but NUL
3030 * should be just as good. */
3031 return unicode > 0xffff ? 0 : unicode;
3032}
3033
3034/* Calculates how much of string can be shown within the given maximum width
3035 * and sets trimmed parameter to non-zero value if all of string could not be
3036 * shown.
3037 *
3038 * Additionally, adds to coloffset how many many columns to move to align with
3039 * the expected position. Takes into account how multi-byte and double-width
3040 * characters will effect the cursor position.
3041 *
3042 * Returns the number of bytes to output from string to satisfy max_width. */
3043static size_t
3044utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3045{
3046 const char *start = string;
3047 const char *end = strchr(string, '\0');
3048 size_t mbwidth = 0;
3049 size_t width = 0;
3050
3051 *trimmed = 0;
3052
3053 while (string < end) {
3054 int c = *(unsigned char *) string;
3055 unsigned char bytes = utf8_bytes[c];
3056 size_t ucwidth;
3057 unsigned long unicode;
3058
3059 if (string + bytes > end)
3060 break;
3061
3062 /* Change representation to figure out whether
3063 * it is a single- or double-width character. */
3064
3065 unicode = utf8_to_unicode(string, bytes);
3066 /* FIXME: Graceful handling of invalid unicode character. */
3067 if (!unicode)
3068 break;
3069
3070 ucwidth = unicode_width(unicode);
3071 width += ucwidth;
3072 if (width > max_width) {
3073 *trimmed = 1;
3074 break;
3075 }
3076
3077 /* The column offset collects the differences between the
3078 * number of bytes encoding a character and the number of
3079 * columns will be used for rendering said character.
3080 *
3081 * So if some character A is encoded in 2 bytes, but will be
3082 * represented on the screen using only 1 byte this will and up
3083 * adding 1 to the multi-byte column offset.
3084 *
3085 * Assumes that no double-width character can be encoding in
3086 * less than two bytes. */
3087 if (bytes > ucwidth)
3088 mbwidth += bytes - ucwidth;
3089
3090 string += bytes;
3091 }
3092
3093 *coloffset += mbwidth;
3094
3095 return string - start;
3096}
3097
3098
3099/*
6b161b31
JF		 3100 * Status management
3101 */
2e8488b4 3102
8855ada4 3103/* Whether or not the curses interface has been initialized. */
68b6e0eb 3104static bool cursed = FALSE;
8855ada4 3105
6b161b31
JF		 3106/* The status window is used for polling keystrokes. */
3107static WINDOW *status_win;
4a2909a7 3108
2e8488b4 3109/* Update status and title window. */
4a2909a7
JF		 3110static void
3111report(const char *msg, ...)
3112{
6706b2ba
JF		 3113 static bool empty = TRUE;
3114 struct view *view = display[current_view];
b76c2afc 3115
6706b2ba
JF		 3116 if (!empty || *msg) {
3117 va_list args;
4a2909a7 3118
6706b2ba 3119 va_start(args, msg);
4b76734f 3120
6706b2ba
JF		 3121 werase(status_win);
3122 wmove(status_win, 0, 0);
3123 if (*msg) {
3124 vwprintw(status_win, msg, args);
3125 empty = FALSE;
3126 } else {
3127 empty = TRUE;
3128 }
3129 wrefresh(status_win);
b801d8b2 3130
6706b2ba
JF		 3131 va_end(args);
3132 }
3133
3134 update_view_title(view);
85af6284 3135 update_display_cursor();
b801d8b2
JF		 3136}
3137
6b161b31
JF		 3138/* Controls when nodelay should be in effect when polling user input. */
3139static void
1ba2ae4b 3140set_nonblocking_input(bool loading)
b801d8b2 3141{
6706b2ba 3142 static unsigned int loading_views;
b801d8b2 3143
6706b2ba
JF		 3144 if ((loading == FALSE && loading_views-- == 1) ||
3145 (loading == TRUE && loading_views++ == 0))
1ba2ae4b 3146 nodelay(status_win, loading);
6b161b31
JF		 3147}
3148
3149static void
3150init_display(void)
3151{
3152 int x, y;
b76c2afc 3153
6908bdbd
JF		 3154 /* Initialize the curses library */
3155 if (isatty(STDIN_FILENO)) {
8855ada4 3156 cursed = !!initscr();
6908bdbd
JF		 3157 } else {
3158 /* Leave stdin and stdout alone when acting as a pager. */
3159 FILE *io = fopen("/dev/tty", "r+");
3160
e6f60674
JF		 3161 if (!io)
3162 die("Failed to open /dev/tty");
8855ada4 3163 cursed = !!newterm(NULL, io, io);
6908bdbd
JF		 3164 }
3165
8855ada4
JF		 3166 if (!cursed)
3167 die("Failed to initialize curses");
3168
2e8488b4
JF		 3169 nonl(); /* Tell curses not to do NL->CR/NL on output */
3170 cbreak(); /* Take input chars one at a time, no wait for \n */
3171 noecho(); /* Don't echo input */
b801d8b2 3172 leaveok(stdscr, TRUE);
b801d8b2
JF		 3173
3174 if (has_colors())
3175 init_colors();
3176
3177 getmaxyx(stdscr, y, x);
3178 status_win = newwin(1, 0, y - 1, 0);
3179 if (!status_win)
3180 die("Failed to create status window");
3181
3182 /* Enable keyboard mapping */
3183 keypad(status_win, TRUE);
78c70acd 3184 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6b161b31
JF		 3185}
3186
4af34daa 3187static char *
cb9e48c1 3188read_prompt(const char *prompt)
ef5404a4
JF		 3189{
3190 enum { READING, STOP, CANCEL } status = READING;
9e21ce5c 3191 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
ef5404a4
JF		 3192 int pos = 0;
3193
3194 while (status == READING) {
3195 struct view *view;
3196 int i, key;
3197
699ae55b 3198 foreach_view (view, i)
ef5404a4
JF		 3199 update_view(view);
3200
cb9e48c1 3201 report("%s%.*s", prompt, pos, buf);
ef5404a4
JF		 3202 /* Refresh, accept single keystroke of input */
3203 key = wgetch(status_win);
3204 switch (key) {
3205 case KEY_RETURN:
3206 case KEY_ENTER:
3207 case '\n':
3208 status = pos ? STOP : CANCEL;
3209 break;
3210
3211 case KEY_BACKSPACE:
3212 if (pos > 0)
3213 pos--;
3214 else
3215 status = CANCEL;
3216 break;
3217
3218 case KEY_ESC:
3219 status = CANCEL;
3220 break;
3221
3222 case ERR:
3223 break;
3224
3225 default:
3226 if (pos >= sizeof(buf)) {
3227 report("Input string too long");
9e21ce5c 3228 return NULL;
ef5404a4
JF		 3229 }
3230
3231 if (isprint(key))
3232 buf[pos++] = (char) key;
3233 }
3234 }
3235
3236 if (status == CANCEL) {
3237 /* Clear the status window */
3238 report("");
9e21ce5c 3239 return NULL;
ef5404a4
JF		 3240 }
3241
3242 buf[pos++] = 0;
ef5404a4 3243
9e21ce5c 3244 return buf;
ef5404a4 3245}
c34d9c9f
JF		 3246
3247/*
3248 * Repository references
3249 */
3250
3251static struct ref *refs;
3a91b75e 3252static size_t refs_size;
c34d9c9f 3253
1307df1a
JF		 3254/* Id <-> ref store */
3255static struct ref ***id_refs;
3256static size_t id_refs_size;
3257
c34d9c9f
JF		 3258static struct ref **
3259get_refs(char *id)
3260{
1307df1a
JF		 3261 struct ref ***tmp_id_refs;
3262 struct ref **ref_list = NULL;
3263 size_t ref_list_size = 0;
c34d9c9f
JF		 3264 size_t i;
3265
1307df1a
JF		 3266 for (i = 0; i < id_refs_size; i++)
3267 if (!strcmp(id, id_refs[i][0]->id))
3268 return id_refs[i];
3269
3270 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3271 if (!tmp_id_refs)
3272 return NULL;
3273
3274 id_refs = tmp_id_refs;
3275
c34d9c9f
JF		 3276 for (i = 0; i < refs_size; i++) {
3277 struct ref **tmp;
3278
3279 if (strcmp(id, refs[i].id))
3280 continue;
3281
1307df1a 3282 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
c34d9c9f 3283 if (!tmp) {
1307df1a
JF		 3284 if (ref_list)
3285 free(ref_list);
c34d9c9f
JF		 3286 return NULL;
3287 }
3288
1307df1a
JF		 3289 ref_list = tmp;
3290 if (ref_list_size > 0)
3291 ref_list[ref_list_size - 1]->next = 1;
3292 ref_list[ref_list_size] = &refs[i];
3af8774e
JF		 3293
3294 /* XXX: The properties of the commit chains ensures that we can
3295 * safely modify the shared ref. The repo references will
3296 * always be similar for the same id. */
1307df1a
JF		 3297 ref_list[ref_list_size]->next = 0;
3298 ref_list_size++;
c34d9c9f
JF		 3299 }
3300
1307df1a
JF		 3301 if (ref_list)
3302 id_refs[id_refs_size++] = ref_list;
3303
3304 return ref_list;
c34d9c9f
JF		 3305}
3306
3307static int
d0cea5f9 3308read_ref(char *id, int idlen, char *name, int namelen)
c34d9c9f 3309{
d0cea5f9
JF		 3310 struct ref *ref;
3311 bool tag = FALSE;
d0cea5f9 3312
8b0297ae
JF		 3313 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3314 /* Commits referenced by tags has "^{}" appended. */
3315 if (name[namelen - 1] != '}')
3316 return OK;
3317
d0cea5f9
JF		 3318 while (namelen > 0 && name[namelen] != '^')
3319 namelen--;
c34d9c9f 3320
d0cea5f9 3321 tag = TRUE;
8b0297ae
JF		 3322 namelen -= STRING_SIZE("refs/tags/");
3323 name += STRING_SIZE("refs/tags/");
c34d9c9f 3324
d0cea5f9 3325 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
8b0297ae
JF		 3326 namelen -= STRING_SIZE("refs/heads/");
3327 name += STRING_SIZE("refs/heads/");
c34d9c9f 3328
d0cea5f9
JF		 3329 } else if (!strcmp(name, "HEAD")) {
3330 return OK;
3331 }
6706b2ba 3332
d0cea5f9
JF		 3333 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3334 if (!refs)
3335 return ERR;
c34d9c9f 3336
d0cea5f9 3337 ref = &refs[refs_size++];
8b0297ae 3338 ref->name = malloc(namelen + 1);
d0cea5f9
JF		 3339 if (!ref->name)
3340 return ERR;
3af8774e 3341
8b0297ae
JF		 3342 strncpy(ref->name, name, namelen);
3343 ref->name[namelen] = 0;
d0cea5f9
JF		 3344 ref->tag = tag;
3345 string_copy(ref->id, id);
3af8774e 3346
d0cea5f9
JF		 3347 return OK;
3348}
c34d9c9f 3349
d0cea5f9
JF		 3350static int
3351load_refs(void)
3352{
3353 const char *cmd_env = getenv("TIG_LS_REMOTE");
3354 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
c34d9c9f 3355
4a63c884 3356 return read_properties(popen(cmd, "r"), "\t", read_ref);
d0cea5f9 3357}
c34d9c9f 3358
d0cea5f9 3359static int
14c778a6 3360read_repo_config_option(char *name, int namelen, char *value, int valuelen)
d0cea5f9 3361{
22913179 3362 if (!strcmp(name, "i18n.commitencoding"))
d0cea5f9 3363 string_copy(opt_encoding, value);
c34d9c9f 3364
c34d9c9f
JF		 3365 return OK;
3366}
3367
4670cf89 3368static int
14c778a6 3369load_repo_config(void)
4670cf89 3370{
66749723 3371 return read_properties(popen("git repo-config --list", "r"),
14c778a6 3372 "=", read_repo_config_option);
d0cea5f9
JF		 3373}
3374
3375static int
4a63c884 3376read_properties(FILE *pipe, const char *separators,
d0cea5f9
JF		 3377 int (*read_property)(char *, int, char *, int))
3378{
4670cf89
JF		 3379 char buffer[BUFSIZ];
3380 char *name;
d0cea5f9 3381 int state = OK;
4670cf89
JF		 3382
3383 if (!pipe)
3384 return ERR;
3385
d0cea5f9 3386 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4a63c884
JF		 3387 char *value;
3388 size_t namelen;
3389 size_t valuelen;
4670cf89 3390
4a63c884
JF		 3391 name = chomp_string(name);
3392 namelen = strcspn(name, separators);
3393
3394 if (name[namelen]) {
3395 name[namelen] = 0;
3396 value = chomp_string(name + namelen + 1);
d0cea5f9 3397 valuelen = strlen(value);
4670cf89 3398
d0cea5f9 3399 } else {
d0cea5f9
JF		 3400 value = "";
3401 valuelen = 0;
4670cf89 3402 }
d0cea5f9 3403
3c3801c2 3404 state = read_property(name, namelen, value, valuelen);
4670cf89
JF		 3405 }
3406
d0cea5f9
JF		 3407 if (state != ERR && ferror(pipe))
3408 state = ERR;
4670cf89
JF		 3409
3410 pclose(pipe);
3411
d0cea5f9 3412 return state;
4670cf89
JF		 3413}
3414
d0cea5f9 3415
6b161b31
JF		 3416/*
3417 * Main
3418 */
3419
b5c9e67f 3420static void __NORETURN
6b161b31
JF		 3421quit(int sig)
3422{
8855ada4
JF		 3423 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3424 if (cursed)
3425 endwin();
6b161b31
JF		 3426 exit(0);
3427}
3428
c6704a4e
JF		 3429static void __NORETURN
3430die(const char *err, ...)
6b161b31
JF		 3431{
3432 va_list args;
3433
3434 endwin();
3435
3436 va_start(args, err);
3437 fputs("tig: ", stderr);
3438 vfprintf(stderr, err, args);
3439 fputs("\n", stderr);
3440 va_end(args);
3441
3442 exit(1);
3443}
3444
3445int
3446main(int argc, char *argv[])
3447{
1ba2ae4b 3448 struct view *view;
6b161b31 3449 enum request request;
1ba2ae4b 3450 size_t i;
6b161b31
JF		 3451
3452 signal(SIGINT, quit);
3453
6b68fd24
JF		 3454 if (setlocale(LC_ALL, "")) {
3455 string_copy(opt_codeset, nl_langinfo(CODESET));
3456 }
3457
660e09ad
JF		 3458 if (load_options() == ERR)
3459 die("Failed to load user config.");
3460
3461 /* Load the repo config file so options can be overwritten from
afdc35b3 3462 * the command line. */
14c778a6 3463 if (load_repo_config() == ERR)
afdc35b3
JF		 3464 die("Failed to load repo config.");
3465
8855ada4 3466 if (!parse_options(argc, argv))
6b161b31
JF		 3467 return 0;
3468
6b68fd24
JF		 3469 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3470 opt_iconv = iconv_open(opt_codeset, opt_encoding);
20f4b4a3 3471 if (opt_iconv == ICONV_NONE)
6b68fd24
JF		 3472 die("Failed to initialize character set conversion");
3473 }
3474
c34d9c9f
JF		 3475 if (load_refs() == ERR)
3476 die("Failed to load refs.");
3477
7bb55251
JF		 3478 /* Require a git repository unless when running in pager mode. */
3479 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3480 die("Not a git repository");
3481
1ba2ae4b
JF		 3482 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3483 view->cmd_env = getenv(view->cmd_env);
3484
6b161b31
JF		 3485 request = opt_request;
3486
3487 init_display();
b801d8b2
JF		 3488
3489 while (view_driver(display[current_view], request)) {
6b161b31 3490 int key;
b801d8b2
JF		 3491 int i;
3492
699ae55b 3493 foreach_view (view, i)
6b161b31 3494 update_view(view);
b801d8b2
JF		 3495
3496 /* Refresh, accept single keystroke of input */
6b161b31 3497 key = wgetch(status_win);
04e2b7b2
JF		 3498
3499 request = get_keybinding(display[current_view]->keymap, key);
03a93dbb 3500
6706b2ba 3501 /* Some low-level request handling. This keeps access to
fac7db6c
JF		 3502 * status_win restricted. */
3503 switch (request) {
3504 case REQ_PROMPT:
9e21ce5c
JF		 3505 {
3506 char *cmd = read_prompt(":");
3507
3508 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3509 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3510 opt_request = REQ_VIEW_DIFF;
3511 } else {
3512 opt_request = REQ_VIEW_PAGER;
3513 }
3514 break;
3515 }
fac7db6c 3516
1d754561 3517 request = REQ_NONE;
9e21ce5c
JF		 3518 break;
3519 }
4af34daa
JF		 3520 case REQ_SEARCH:
3521 case REQ_SEARCH_BACK:
3522 {
3523 const char *prompt = request == REQ_SEARCH
3524 ? "/" : "?";
3525 char *search = read_prompt(prompt);
3526
3527 if (search)
3528 string_copy(opt_search, search);
3529 else
3530 request = REQ_NONE;
3531 break;
3532 }
fac7db6c
JF		 3533 case REQ_SCREEN_RESIZE:
3534 {
3535 int height, width;
3536
3537 getmaxyx(stdscr, height, width);
3538
3539 /* Resize the status view and let the view driver take
3540 * care of resizing the displayed views. */
3541 wresize(status_win, 1, width);
3542 mvwin(status_win, height - 1, 0);
3543 wrefresh(status_win);
3544 break;
3545 }
3546 default:
3547 break;
03a93dbb 3548 }
b801d8b2
JF		 3549 }
3550
3551 quit(0);
3552
3553 return 0;
3554}
Full-screen terminal Git browser.