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