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