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move_view: drop redraw arg and handle backgrounded moves
[tig] / tig.c
CommitLineData
4a2909a7 1/* Copyright (c) 2006 Jonas Fonseca <fonseca@diku.dk>
192d9a60 2 *
5cfbde75
JF		 3 * This program is free software; you can redistribute it and/or
4 * modify it under the terms of the GNU General Public License as
5 * published by the Free Software Foundation; either version 2 of
6 * the License, or (at your option) any later version.
192d9a60
JF		 7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
b801d8b2 13
b76c2afc 14#ifndef VERSION
0f11e3a9 15#define VERSION "tig-0.4.git"
b76c2afc
JF		 16#endif
17
8855ada4
JF		 18#ifndef DEBUG
19#define NDEBUG
20#endif
21
22f66b0a 22#include <assert.h>
4c6fabc2 23#include <errno.h>
22f66b0a
JF		 24#include <ctype.h>
25#include <signal.h>
b801d8b2 26#include <stdarg.h>
b801d8b2 27#include <stdio.h>
22f66b0a 28#include <stdlib.h>
b801d8b2 29#include <string.h>
6908bdbd 30#include <unistd.h>
b76c2afc 31#include <time.h>
b801d8b2 32
4af34daa
JF		 33#include <sys/types.h>
34#include <regex.h>
35
6b68fd24
JF		 36#include <locale.h>
37#include <langinfo.h>
38#include <iconv.h>
39
b801d8b2 40#include <curses.h>
b801d8b2 41
e2da526d
JF		 42#if __GNUC__ >= 3
43#define __NORETURN __attribute__((__noreturn__))
44#else
45#define __NORETURN
46#endif
47
48static void __NORETURN die(const char *err, ...);
b801d8b2 49static void report(const char *msg, ...);
4a63c884 50static int read_properties(FILE *pipe, const char *separators, int (*read)(char *, int, char *, int));
1ba2ae4b 51static void set_nonblocking_input(bool loading);
10e290ee 52static size_t utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed);
6b161b31
JF		 53
54#define ABS(x) ((x) >= 0 ? (x) : -(x))
55#define MIN(x, y) ((x) < (y) ? (x) : (y))
56
57#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
58#define STRING_SIZE(x) (sizeof(x) - 1)
b76c2afc 59
17482b11 60#define SIZEOF_STR 1024 /* Default string size. */
2e8488b4 61#define SIZEOF_REF 256 /* Size of symbolic or SHA1 ID. */
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), \
a28bcc22
JF		 568LINE(DEFAULT, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
569LINE(CURSOR, "", COLOR_WHITE, COLOR_GREEN, A_BOLD), \
570LINE(STATUS, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
6b161b31
JF		 571LINE(TITLE_BLUR, "", COLOR_WHITE, COLOR_BLUE, 0), \
572LINE(TITLE_FOCUS, "", COLOR_WHITE, COLOR_BLUE, A_BOLD), \
a28bcc22
JF		 573LINE(MAIN_DATE, "", COLOR_BLUE, COLOR_DEFAULT, 0), \
574LINE(MAIN_AUTHOR, "", COLOR_GREEN, COLOR_DEFAULT, 0), \
575LINE(MAIN_COMMIT, "", COLOR_DEFAULT, COLOR_DEFAULT, 0), \
c34d9c9f
JF		 576LINE(MAIN_DELIM, "", COLOR_MAGENTA, COLOR_DEFAULT, 0), \
577LINE(MAIN_TAG, "", COLOR_MAGENTA, COLOR_DEFAULT, A_BOLD), \
660e09ad 578LINE(MAIN_REF, "", COLOR_CYAN, COLOR_DEFAULT, A_BOLD), \
e733ee54
JF		 579LINE(TREE_DIR, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL), \
580LINE(TREE_FILE, "", COLOR_DEFAULT, COLOR_DEFAULT, A_NORMAL)
660e09ad 581
78c70acd 582enum line_type {
2e8488b4
JF		 583#define LINE(type, line, fg, bg, attr) \
584 LINE_##type
585 LINE_INFO
586#undef LINE
78c70acd
JF		 587};
588
589struct line_info {
660e09ad
JF		 590 const char *name; /* Option name. */
591 int namelen; /* Size of option name. */
4685845e 592 const char *line; /* The start of line to match. */
2e8488b4
JF		 593 int linelen; /* Size of string to match. */
594 int fg, bg, attr; /* Color and text attributes for the lines. */
78c70acd
JF		 595};
596
2e8488b4 597static struct line_info line_info[] = {
78c70acd 598#define LINE(type, line, fg, bg, attr) \
660e09ad 599 { #type, STRING_SIZE(#type), (line), STRING_SIZE(line), (fg), (bg), (attr) }
2e8488b4
JF		 600 LINE_INFO
601#undef LINE
78c70acd
JF		 602};
603
2e8488b4
JF		 604static enum line_type
605get_line_type(char *line)
78c70acd
JF		 606{
607 int linelen = strlen(line);
a28bcc22 608 enum line_type type;
78c70acd 609
a28bcc22 610 for (type = 0; type < ARRAY_SIZE(line_info); type++)
2e8488b4 611 /* Case insensitive search matches Signed-off-by lines better. */
a28bcc22
JF		 612 if (linelen >= line_info[type].linelen &&
613 !strncasecmp(line_info[type].line, line, line_info[type].linelen))
614 return type;
78c70acd 615
2e8488b4 616 return LINE_DEFAULT;
78c70acd
JF		 617}
618
2e8488b4 619static inline int
78c70acd
JF		 620get_line_attr(enum line_type type)
621{
2e8488b4
JF		 622 assert(type < ARRAY_SIZE(line_info));
623 return COLOR_PAIR(type) | line_info[type].attr;
78c70acd
JF		 624}
625
660e09ad
JF		 626static struct line_info *
627get_line_info(char *name, int namelen)
628{
629 enum line_type type;
660e09ad
JF		 630
631 for (type = 0; type < ARRAY_SIZE(line_info); type++)
632 if (namelen == line_info[type].namelen &&
201f5a18 633 !string_enum_compare(line_info[type].name, name, namelen))
660e09ad
JF		 634 return &line_info[type];
635
636 return NULL;
637}
638
78c70acd
JF		 639static void
640init_colors(void)
641{
82e78006
JF		 642 int default_bg = COLOR_BLACK;
643 int default_fg = COLOR_WHITE;
a28bcc22 644 enum line_type type;
78c70acd
JF		 645
646 start_color();
647
648 if (use_default_colors() != ERR) {
82e78006
JF		 649 default_bg = -1;
650 default_fg = -1;
78c70acd
JF		 651 }
652
a28bcc22
JF		 653 for (type = 0; type < ARRAY_SIZE(line_info); type++) {
654 struct line_info *info = &line_info[type];
82e78006
JF		 655 int bg = info->bg == COLOR_DEFAULT ? default_bg : info->bg;
656 int fg = info->fg == COLOR_DEFAULT ? default_fg : info->fg;
78c70acd 657
a28bcc22 658 init_pair(type, fg, bg);
78c70acd
JF		 659 }
660}
661
fe7233c3
JF		 662struct line {
663 enum line_type type;
3c571d67
JF		 664
665 /* State flags */
666 unsigned int selected:1;
667
fe7233c3
JF		 668 void *data; /* User data */
669};
670
78c70acd 671
1899507c 672/*
37157fa0
JF		 673 * Keys
674 */
675
93a97d86 676struct keybinding {
37157fa0 677 int alias;
93a97d86 678 enum request request;
04e2b7b2 679 struct keybinding *next;
37157fa0
JF		 680};
681
93a97d86 682static struct keybinding default_keybindings[] = {
37157fa0
JF		 683 /* View switching */
684 { 'm', REQ_VIEW_MAIN },
685 { 'd', REQ_VIEW_DIFF },
686 { 'l', REQ_VIEW_LOG },
e733ee54 687 { 't', REQ_VIEW_TREE },
0001fc34 688 { 'f', REQ_VIEW_BLOB },
37157fa0
JF		 689 { 'p', REQ_VIEW_PAGER },
690 { 'h', REQ_VIEW_HELP },
37157fa0
JF		 691
692 /* View manipulation */
693 { 'q', REQ_VIEW_CLOSE },
694 { KEY_TAB, REQ_VIEW_NEXT },
695 { KEY_RETURN, REQ_ENTER },
696 { KEY_UP, REQ_PREVIOUS },
697 { KEY_DOWN, REQ_NEXT },
698
699 /* Cursor navigation */
700 { 'k', REQ_MOVE_UP },
701 { 'j', REQ_MOVE_DOWN },
702 { KEY_HOME, REQ_MOVE_FIRST_LINE },
703 { KEY_END, REQ_MOVE_LAST_LINE },
704 { KEY_NPAGE, REQ_MOVE_PAGE_DOWN },
705 { ' ', REQ_MOVE_PAGE_DOWN },
706 { KEY_PPAGE, REQ_MOVE_PAGE_UP },
707 { 'b', REQ_MOVE_PAGE_UP },
708 { '-', REQ_MOVE_PAGE_UP },
709
710 /* Scrolling */
711 { KEY_IC, REQ_SCROLL_LINE_UP },
712 { KEY_DC, REQ_SCROLL_LINE_DOWN },
713 { 'w', REQ_SCROLL_PAGE_UP },
714 { 's', REQ_SCROLL_PAGE_DOWN },
715
4af34daa
JF		 716 /* Searching */
717 { '/', REQ_SEARCH },
718 { '?', REQ_SEARCH_BACK },
719 { 'n', REQ_FIND_NEXT },
720 { 'N', REQ_FIND_PREV },
721
37157fa0
JF		 722 /* Misc */
723 { 'Q', REQ_QUIT },
724 { 'z', REQ_STOP_LOADING },
725 { 'v', REQ_SHOW_VERSION },
726 { 'r', REQ_SCREEN_REDRAW },
904e68d8 727 { '.', REQ_TOGGLE_LINENO },
73fb51d5 728 { 'g', REQ_TOGGLE_REV_GRAPH },
37157fa0
JF		 729 { ':', REQ_PROMPT },
730
731 /* wgetch() with nodelay() enabled returns ERR when there's no input. */
1d754561 732 { ERR, REQ_NONE },
37157fa0 733
1d754561 734 /* Using the ncurses SIGWINCH handler. */
37157fa0
JF		 735 { KEY_RESIZE, REQ_SCREEN_RESIZE },
736};
737
04e2b7b2
JF		 738#define KEYMAP_INFO \
739 KEYMAP_(GENERIC), \
740 KEYMAP_(MAIN), \
741 KEYMAP_(DIFF), \
742 KEYMAP_(LOG), \
e733ee54
JF		 743 KEYMAP_(TREE), \
744 KEYMAP_(BLOB), \
04e2b7b2
JF		 745 KEYMAP_(PAGER), \
746 KEYMAP_(HELP) \
747
748enum keymap {
749#define KEYMAP_(name) KEYMAP_##name
750 KEYMAP_INFO
751#undef KEYMAP_
752};
753
754static struct int_map keymap_table[] = {
755#define KEYMAP_(name) { #name, STRING_SIZE(#name), KEYMAP_##name }
756 KEYMAP_INFO
757#undef KEYMAP_
758};
759
760#define set_keymap(map, name) \
761 set_from_int_map(keymap_table, ARRAY_SIZE(keymap_table), map, name, strlen(name))
762
763static struct keybinding *keybindings[ARRAY_SIZE(keymap_table)];
764
765static void
766add_keybinding(enum keymap keymap, enum request request, int key)
767{
768 struct keybinding *keybinding;
769
770 keybinding = calloc(1, sizeof(*keybinding));
771 if (!keybinding)
772 die("Failed to allocate keybinding");
773
774 keybinding->alias = key;
775 keybinding->request = request;
776 keybinding->next = keybindings[keymap];
777 keybindings[keymap] = keybinding;
778}
779
780/* Looks for a key binding first in the given map, then in the generic map, and
781 * lastly in the default keybindings. */
37157fa0 782static enum request
04e2b7b2 783get_keybinding(enum keymap keymap, int key)
37157fa0 784{
04e2b7b2 785 struct keybinding *kbd;
37157fa0
JF		 786 int i;
787
04e2b7b2
JF		 788 for (kbd = keybindings[keymap]; kbd; kbd = kbd->next)
789 if (kbd->alias == key)
790 return kbd->request;
791
792 for (kbd = keybindings[KEYMAP_GENERIC]; kbd; kbd = kbd->next)
793 if (kbd->alias == key)
794 return kbd->request;
795
93a97d86
JF		 796 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++)
797 if (default_keybindings[i].alias == key)
798 return default_keybindings[i].request;
37157fa0
JF		 799
800 return (enum request) key;
801}
802
93a97d86 803
37157fa0
JF		 804struct key {
805 char *name;
806 int value;
807};
808
809static struct key key_table[] = {
810 { "Enter", KEY_RETURN },
811 { "Space", ' ' },
812 { "Backspace", KEY_BACKSPACE },
813 { "Tab", KEY_TAB },
814 { "Escape", KEY_ESC },
815 { "Left", KEY_LEFT },
816 { "Right", KEY_RIGHT },
817 { "Up", KEY_UP },
818 { "Down", KEY_DOWN },
819 { "Insert", KEY_IC },
820 { "Delete", KEY_DC },
74f83ee6 821 { "Hash", '#' },
37157fa0
JF		 822 { "Home", KEY_HOME },
823 { "End", KEY_END },
824 { "PageUp", KEY_PPAGE },
825 { "PageDown", KEY_NPAGE },
826 { "F1", KEY_F(1) },
827 { "F2", KEY_F(2) },
828 { "F3", KEY_F(3) },
829 { "F4", KEY_F(4) },
830 { "F5", KEY_F(5) },
831 { "F6", KEY_F(6) },
832 { "F7", KEY_F(7) },
833 { "F8", KEY_F(8) },
834 { "F9", KEY_F(9) },
835 { "F10", KEY_F(10) },
836 { "F11", KEY_F(11) },
837 { "F12", KEY_F(12) },
838};
839
04e2b7b2
JF		 840static int
841get_key_value(const char *name)
842{
843 int i;
844
845 for (i = 0; i < ARRAY_SIZE(key_table); i++)
846 if (!strcasecmp(key_table[i].name, name))
847 return key_table[i].value;
848
849 if (strlen(name) == 1 && isprint(*name))
850 return (int) *name;
851
852 return ERR;
853}
854
37157fa0
JF		 855static char *
856get_key(enum request request)
857{
858 static char buf[BUFSIZ];
859 static char key_char[] = "'X'";
d65ced0d 860 size_t pos = 0;
37157fa0
JF		 861 char *sep = " ";
862 int i;
863
864 buf[pos] = 0;
865
93a97d86
JF		 866 for (i = 0; i < ARRAY_SIZE(default_keybindings); i++) {
867 struct keybinding *keybinding = &default_keybindings[i];
37157fa0
JF		 868 char *seq = NULL;
869 int key;
870
93a97d86 871 if (keybinding->request != request)
37157fa0
JF		 872 continue;
873
874 for (key = 0; key < ARRAY_SIZE(key_table); key++)
93a97d86 875 if (key_table[key].value == keybinding->alias)
37157fa0
JF		 876 seq = key_table[key].name;
877
878 if (seq == NULL &&
93a97d86
JF		 879 keybinding->alias < 127 &&
880 isprint(keybinding->alias)) {
881 key_char[1] = (char) keybinding->alias;
37157fa0
JF		 882 seq = key_char;
883 }
884
885 if (!seq)
886 seq = "'?'";
887
888 if (!string_format_from(buf, &pos, "%s%s", sep, seq))
889 return "Too many keybindings!";
890 sep = ", ";
891 }
892
893 return buf;
894}
895
896
897/*
1899507c
JF		 898 * User config file handling.
899 */
900
5dc795f2
JF		 901static struct int_map color_map[] = {
902#define COLOR_MAP(name) { #name, STRING_SIZE(#name), COLOR_##name }
903 COLOR_MAP(DEFAULT),
904 COLOR_MAP(BLACK),
905 COLOR_MAP(BLUE),
906 COLOR_MAP(CYAN),
907 COLOR_MAP(GREEN),
908 COLOR_MAP(MAGENTA),
909 COLOR_MAP(RED),
910 COLOR_MAP(WHITE),
911 COLOR_MAP(YELLOW),
912};
913
9256ab05
JF		 914#define set_color(color, name) \
915 set_from_int_map(color_map, ARRAY_SIZE(color_map), color, name, strlen(name))
660e09ad 916
5dc795f2
JF		 917static struct int_map attr_map[] = {
918#define ATTR_MAP(name) { #name, STRING_SIZE(#name), A_##name }
919 ATTR_MAP(NORMAL),
920 ATTR_MAP(BLINK),
921 ATTR_MAP(BOLD),
922 ATTR_MAP(DIM),
923 ATTR_MAP(REVERSE),
924 ATTR_MAP(STANDOUT),
925 ATTR_MAP(UNDERLINE),
926};
927
9256ab05
JF		 928#define set_attribute(attr, name) \
929 set_from_int_map(attr_map, ARRAY_SIZE(attr_map), attr, name, strlen(name))
660e09ad 930
3c3801c2
JF		 931static int config_lineno;
932static bool config_errors;
933static char *config_msg;
934
5bfd96c7 935/* Wants: object fgcolor bgcolor [attr] */
660e09ad 936static int
5bfd96c7 937option_color_command(int argc, char *argv[])
660e09ad 938{
bca8fcaa
JF		 939 struct line_info *info;
940
9256ab05
JF		 941 if (argc != 3 && argc != 4) {
942 config_msg = "Wrong number of arguments given to color command";
943 return ERR;
944 }
945
946 info = get_line_info(argv[0], strlen(argv[0]));
bca8fcaa
JF		 947 if (!info) {
948 config_msg = "Unknown color name";
949 return ERR;
950 }
660e09ad 951
a3653368
JF		 952 if (set_color(&info->fg, argv[1]) == ERR ||
953 set_color(&info->bg, argv[2]) == ERR) {
bca8fcaa
JF		 954 config_msg = "Unknown color";
955 return ERR;
956 }
660e09ad 957
9256ab05 958 if (argc == 4 && set_attribute(&info->attr, argv[3]) == ERR) {
bca8fcaa
JF		 959 config_msg = "Unknown attribute";
960 return ERR;
660e09ad
JF		 961 }
962
bca8fcaa
JF		 963 return OK;
964}
965
5bfd96c7
JF		 966/* Wants: name = value */
967static int
968option_set_command(int argc, char *argv[])
969{
970 if (argc != 3) {
971 config_msg = "Wrong number of arguments given to set command";
972 return ERR;
973 }
974
975 if (strcmp(argv[1], "=")) {
976 config_msg = "No value assigned";
977 return ERR;
978 }
979
980 if (!strcmp(argv[0], "show-rev-graph")) {
981 opt_rev_graph = (!strcmp(argv[2], "1") ||
982 !strcmp(argv[2], "true") ||
983 !strcmp(argv[2], "yes"));
984 return OK;
985 }
986
987 if (!strcmp(argv[0], "line-number-interval")) {
988 opt_num_interval = atoi(argv[2]);
989 return OK;
990 }
991
992 if (!strcmp(argv[0], "tab-size")) {
993 opt_tab_size = atoi(argv[2]);
994 return OK;
995 }
996
cb7267ee 997 if (!strcmp(argv[0], "commit-encoding")) {
3cc9a4d4
JF		 998 char *arg = argv[2];
999 int delimiter = *arg;
1000 int i;
1001
1002 switch (delimiter) {
1003 case '"':
1004 case '\'':
1005 for (arg++, i = 0; arg[i]; i++)
1006 if (arg[i] == delimiter) {
1007 arg[i] = 0;
1008 break;
1009 }
1010 default:
1011 string_copy(opt_encoding, arg);
1012 return OK;
1013 }
5bfd96c7
JF		 1014 }
1015
a3653368 1016 config_msg = "Unknown variable name";
5bfd96c7
JF		 1017 return ERR;
1018}
1019
04e2b7b2
JF		 1020/* Wants: mode request key */
1021static int
1022option_bind_command(int argc, char *argv[])
1023{
1024 enum request request;
1025 int keymap;
1026 int key;
1027
1028 if (argc != 3) {
1029 config_msg = "Wrong number of arguments given to bind command";
1030 return ERR;
1031 }
1032
1033 if (set_keymap(&keymap, argv[0]) == ERR) {
1034 config_msg = "Unknown key map";
1035 return ERR;
1036 }
1037
1038 key = get_key_value(argv[1]);
1039 if (key == ERR) {
1040 config_msg = "Unknown key";
1041 return ERR;
1042 }
1043
1044 request = get_request(argv[2]);
1045 if (request == REQ_UNKNOWN) {
1046 config_msg = "Unknown request name";
1047 return ERR;
1048 }
1049
1050 add_keybinding(keymap, request, key);
1051
1052 return OK;
1053}
1054
bca8fcaa 1055static int
9256ab05 1056set_option(char *opt, char *value)
bca8fcaa 1057{
9256ab05
JF		 1058 char *argv[16];
1059 int valuelen;
1060 int argc = 0;
1061
1062 /* Tokenize */
1063 while (argc < ARRAY_SIZE(argv) && (valuelen = strcspn(value, " \t"))) {
1064 argv[argc++] = value;
1065
1066 value += valuelen;
1067 if (!*value)
1068 break;
1069
1070 *value++ = 0;
1071 while (isspace(*value))
1072 value++;
1073 }
1074
1075 if (!strcmp(opt, "color"))
5bfd96c7
JF		 1076 return option_color_command(argc, argv);
1077
1078 if (!strcmp(opt, "set"))
1079 return option_set_command(argc, argv);
bca8fcaa 1080
04e2b7b2
JF		 1081 if (!strcmp(opt, "bind"))
1082 return option_bind_command(argc, argv);
1083
a3653368 1084 config_msg = "Unknown option command";
660e09ad
JF		 1085 return ERR;
1086}
1087
1088static int
3c3801c2
JF		 1089read_option(char *opt, int optlen, char *value, int valuelen)
1090{
a3653368
JF		 1091 int status = OK;
1092
3c3801c2
JF		 1093 config_lineno++;
1094 config_msg = "Internal error";
1095
a3653368
JF		 1096 /* Check for comment markers, since read_properties() will
1097 * only ensure opt and value are split at first " \t". */
74f83ee6 1098 optlen = strcspn(opt, "#");
a3653368 1099 if (optlen == 0)
3c3801c2
JF		 1100 return OK;
1101
a3653368
JF		 1102 if (opt[optlen] != 0) {
1103 config_msg = "No option value";
1104 status = ERR;
1105
1106 } else {
1107 /* Look for comment endings in the value. */
74f83ee6 1108 int len = strcspn(value, "#");
a3653368
JF		 1109
1110 if (len < valuelen) {
1111 valuelen = len;
1112 value[valuelen] = 0;
1113 }
1114
1115 status = set_option(opt, value);
3c3801c2
JF		 1116 }
1117
a3653368
JF		 1118 if (status == ERR) {
1119 fprintf(stderr, "Error on line %d, near '%.*s': %s\n",
3c3801c2
JF		 1120 config_lineno, optlen, opt, config_msg);
1121 config_errors = TRUE;
1122 }
1123
1124 /* Always keep going if errors are encountered. */
1125 return OK;
1126}
1127
1128static int
660e09ad
JF		 1129load_options(void)
1130{
1131 char *home = getenv("HOME");
17482b11 1132 char buf[SIZEOF_STR];
660e09ad
JF		 1133 FILE *file;
1134
3c3801c2
JF		 1135 config_lineno = 0;
1136 config_errors = FALSE;
1137
cc2d1364 1138 if (!home || !string_format(buf, "%s/.tigrc", home))
660e09ad
JF		 1139 return ERR;
1140
1141 /* It's ok that the file doesn't exist. */
1142 file = fopen(buf, "r");
1143 if (!file)
1144 return OK;
1145
3c3801c2
JF		 1146 if (read_properties(file, " \t", read_option) == ERR ||
1147 config_errors == TRUE)
1148 fprintf(stderr, "Errors while loading %s.\n", buf);
1149
1150 return OK;
660e09ad
JF		 1151}
1152
1153
d839253b 1154/*
468876c9 1155 * The viewer
d839253b 1156 */
c2124ccd
JF		 1157
1158struct view;
fe7233c3 1159struct view_ops;
c2124ccd
JF		 1160
1161/* The display array of active views and the index of the current view. */
1162static struct view *display[2];
1163static unsigned int current_view;
1164
33c4f9ea 1165#define foreach_displayed_view(view, i) \
c2124ccd
JF		 1166 for (i = 0; i < ARRAY_SIZE(display) && (view = display[i]); i++)
1167
9f41488f 1168#define displayed_views() (display[1] != NULL ? 2 : 1)
c2124ccd 1169
d839253b 1170/* Current head and commit ID */
e733ee54 1171static char ref_blob[SIZEOF_REF] = "";
c2124ccd
JF		 1172static char ref_commit[SIZEOF_REF] = "HEAD";
1173static char ref_head[SIZEOF_REF] = "HEAD";
1174
b801d8b2 1175struct view {
03a93dbb 1176 const char *name; /* View name */
4685845e
TH		 1177 const char *cmd_fmt; /* Default command line format */
1178 const char *cmd_env; /* Command line set via environment */
e733ee54 1179 const char *id; /* Points to either of ref_{head,commit,blob} */
6b161b31 1180
fe7233c3 1181 struct view_ops *ops; /* View operations */
22f66b0a 1182
04e2b7b2
JF		 1183 enum keymap keymap; /* What keymap does this view have */
1184
17482b11 1185 char cmd[SIZEOF_STR]; /* Command buffer */
49f2b43f
JF		 1186 char ref[SIZEOF_REF]; /* Hovered commit reference */
1187 char vid[SIZEOF_REF]; /* View ID. Set to id member when updating. */
2e8488b4 1188
8855ada4
JF		 1189 int height, width; /* The width and height of the main window */
1190 WINDOW *win; /* The main window */
1191 WINDOW *title; /* The title window living below the main window */
b801d8b2
JF		 1192
1193 /* Navigation */
1194 unsigned long offset; /* Offset of the window top */
1195 unsigned long lineno; /* Current line number */
1196
4af34daa
JF		 1197 /* Searching */
1198 char grep[SIZEOF_STR]; /* Search string */
b77b2cb8 1199 regex_t *regex; /* Pre-compiled regex */
4af34daa 1200
f6da0b66
JF		 1201 /* If non-NULL, points to the view that opened this view. If this view
1202 * is closed tig will switch back to the parent view. */
1203 struct view *parent;
1204
b801d8b2
JF		 1205 /* Buffering */
1206 unsigned long lines; /* Total number of lines */
fe7233c3 1207 struct line *line; /* Line index */
e2c01617 1208 unsigned long line_size;/* Total number of allocated lines */
8855ada4 1209 unsigned int digits; /* Number of digits in the lines member. */
b801d8b2
JF		 1210
1211 /* Loading */
1212 FILE *pipe;
2e8488b4 1213 time_t start_time;
b801d8b2
JF		 1214};
1215
fe7233c3
JF		 1216struct view_ops {
1217 /* What type of content being displayed. Used in the title bar. */
1218 const char *type;
1219 /* Draw one line; @lineno must be < view->height. */
5dcf8064 1220 bool (*draw)(struct view *view, struct line *line, unsigned int lineno, bool selected);
fe7233c3 1221 /* Read one line; updates view->line. */
701e4f5d 1222 bool (*read)(struct view *view, char *data);
fe7233c3
JF		 1223 /* Depending on view, change display based on current line. */
1224 bool (*enter)(struct view *view, struct line *line);
4af34daa
JF		 1225 /* Search for regex in a line. */
1226 bool (*grep)(struct view *view, struct line *line);
d720de4b
JF		 1227 /* Select line */
1228 void (*select)(struct view *view, struct line *line);
fe7233c3
JF		 1229};
1230
6b161b31
JF		 1231static struct view_ops pager_ops;
1232static struct view_ops main_ops;
e733ee54
JF		 1233static struct view_ops tree_ops;
1234static struct view_ops blob_ops;
a28bcc22 1235
04e2b7b2
JF		 1236#define VIEW_STR(name, cmd, env, ref, ops, map) \
1237 { name, cmd, #env, ref, ops, map}
1ba2ae4b 1238
95d7ddcd 1239#define VIEW_(id, name, ops, ref) \
04e2b7b2 1240 VIEW_STR(name, TIG_##id##_CMD, TIG_##id##_CMD, ref, ops, KEYMAP_##id)
1ba2ae4b 1241
c2124ccd 1242
b801d8b2 1243static struct view views[] = {
95d7ddcd
JF		 1244 VIEW_(MAIN, "main", &main_ops, ref_head),
1245 VIEW_(DIFF, "diff", &pager_ops, ref_commit),
1246 VIEW_(LOG, "log", &pager_ops, ref_head),
e733ee54
JF		 1247 VIEW_(TREE, "tree", &tree_ops, ref_commit),
1248 VIEW_(BLOB, "blob", &blob_ops, ref_blob),
95d7ddcd
JF		 1249 VIEW_(HELP, "help", &pager_ops, "static"),
1250 VIEW_(PAGER, "pager", &pager_ops, "static"),
b801d8b2
JF		 1251};
1252
a28bcc22
JF		 1253#define VIEW(req) (&views[(req) - REQ_OFFSET - 1])
1254
699ae55b
JF		 1255#define foreach_view(view, i) \
1256 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
1257
1258#define view_is_displayed(view) \
1259 (view == display[0] || view == display[1])
4c6fabc2 1260
fe7233c3
JF		 1261static bool
1262draw_view_line(struct view *view, unsigned int lineno)
1263{
d720de4b 1264 struct line *line;
5dcf8064 1265 bool selected = (view->offset + lineno == view->lineno);
d720de4b 1266
699ae55b
JF		 1267 assert(view_is_displayed(view));
1268
fe7233c3
JF		 1269 if (view->offset + lineno >= view->lines)
1270 return FALSE;
1271
d720de4b
JF		 1272 line = &view->line[view->offset + lineno];
1273
3c571d67
JF		 1274 if (selected) {
1275 line->selected = TRUE;
d720de4b 1276 view->ops->select(view, line);
3c571d67
JF		 1277 } else if (line->selected) {
1278 line->selected = FALSE;
1279 wmove(view->win, lineno, 0);
1280 wclrtoeol(view->win);
1281 }
d720de4b 1282
5dcf8064 1283 return view->ops->draw(view, line, lineno, selected);
fe7233c3
JF		 1284}
1285
b801d8b2 1286static void
82e78006 1287redraw_view_from(struct view *view, int lineno)
b801d8b2 1288{
82e78006 1289 assert(0 <= lineno && lineno < view->height);
b801d8b2 1290
82e78006 1291 for (; lineno < view->height; lineno++) {
fe7233c3 1292 if (!draw_view_line(view, lineno))
fd85fef1 1293 break;
b801d8b2
JF		 1294 }
1295
1296 redrawwin(view->win);
1297 wrefresh(view->win);
1298}
1299
b76c2afc 1300static void
82e78006
JF		 1301redraw_view(struct view *view)
1302{
1303 wclear(view->win);
1304 redraw_view_from(view, 0);
1305}
1306
c2124ccd 1307
6b161b31 1308static void
81030ec8
JF		 1309update_view_title(struct view *view)
1310{
699ae55b
JF		 1311 assert(view_is_displayed(view));
1312
81030ec8
JF		 1313 if (view == display[current_view])
1314 wbkgdset(view->title, get_line_attr(LINE_TITLE_FOCUS));
1315 else
1316 wbkgdset(view->title, get_line_attr(LINE_TITLE_BLUR));
1317
1318 werase(view->title);
1319 wmove(view->title, 0, 0);
1320
81030ec8
JF		 1321 if (*view->ref)
1322 wprintw(view->title, "[%s] %s", view->name, view->ref);
1323 else
1324 wprintw(view->title, "[%s]", view->name);
1325
c19f8017 1326 if (view->lines || view->pipe) {
6d9c07af 1327 unsigned int view_lines = view->offset + view->height;
c19f8017 1328 unsigned int lines = view->lines
6d9c07af 1329 ? MIN(view_lines, view->lines) * 100 / view->lines
c19f8017
JF		 1330 : 0;
1331
81030ec8
JF		 1332 wprintw(view->title, " - %s %d of %d (%d%%)",
1333 view->ops->type,
1334 view->lineno + 1,
1335 view->lines,
c19f8017 1336 lines);
81030ec8
JF		 1337 }
1338
f97f4012
JF		 1339 if (view->pipe) {
1340 time_t secs = time(NULL) - view->start_time;
1341
1342 /* Three git seconds are a long time ... */
1343 if (secs > 2)
1344 wprintw(view->title, " %lds", secs);
1345 }
1346
976447f8 1347 wmove(view->title, 0, view->width - 1);
81030ec8
JF		 1348 wrefresh(view->title);
1349}
1350
1351static void
6b161b31 1352resize_display(void)
b76c2afc 1353{
03a93dbb 1354 int offset, i;
6b161b31
JF		 1355 struct view *base = display[0];
1356 struct view *view = display[1] ? display[1] : display[0];
b76c2afc 1357
6b161b31 1358 /* Setup window dimensions */
b76c2afc 1359
03a93dbb 1360 getmaxyx(stdscr, base->height, base->width);
b76c2afc 1361
6b161b31 1362 /* Make room for the status window. */
03a93dbb 1363 base->height -= 1;
6b161b31
JF		 1364
1365 if (view != base) {
03a93dbb
JF		 1366 /* Horizontal split. */
1367 view->width = base->width;
6b161b31
JF		 1368 view->height = SCALE_SPLIT_VIEW(base->height);
1369 base->height -= view->height;
1370
1371 /* Make room for the title bar. */
1372 view->height -= 1;
1373 }
1374
1375 /* Make room for the title bar. */
1376 base->height -= 1;
1377
1378 offset = 0;
1379
33c4f9ea 1380 foreach_displayed_view (view, i) {
b76c2afc 1381 if (!view->win) {
c19f8017 1382 view->win = newwin(view->height, 0, offset, 0);
6b161b31
JF		 1383 if (!view->win)
1384 die("Failed to create %s view", view->name);
1385
1386 scrollok(view->win, TRUE);
1387
1388 view->title = newwin(1, 0, offset + view->height, 0);
1389 if (!view->title)
1390 die("Failed to create title window");
1391
1392 } else {
c19f8017 1393 wresize(view->win, view->height, view->width);
6b161b31
JF		 1394 mvwin(view->win, offset, 0);
1395 mvwin(view->title, offset + view->height, 0);
a28bcc22 1396 }
a28bcc22 1397
6b161b31 1398 offset += view->height + 1;
b76c2afc 1399 }
6b161b31 1400}
b76c2afc 1401
6b161b31 1402static void
20bb5e18
JF		 1403redraw_display(void)
1404{
1405 struct view *view;
1406 int i;
1407
33c4f9ea 1408 foreach_displayed_view (view, i) {
20bb5e18
JF		 1409 redraw_view(view);
1410 update_view_title(view);
1411 }
1412}
1413
85af6284
JF		 1414static void
1415update_display_cursor(void)
1416{
1417 struct view *view = display[current_view];
1418
1419 /* Move the cursor to the right-most column of the cursor line.
1420 *
1421 * XXX: This could turn out to be a bit expensive, but it ensures that
1422 * the cursor does not jump around. */
1423 if (view->lines) {
1424 wmove(view->win, view->lineno - view->offset, view->width - 1);
1425 wrefresh(view->win);
1426 }
1427}
20bb5e18 1428
2e8488b4
JF		 1429/*
1430 * Navigation
1431 */
1432
4a2909a7 1433/* Scrolling backend */
b801d8b2 1434static void
8c317212 1435do_scroll_view(struct view *view, int lines)
b801d8b2 1436{
a0087dd5
JF		 1437 bool redraw_current_line = FALSE;
1438
fd85fef1
JF		 1439 /* The rendering expects the new offset. */
1440 view->offset += lines;
1441
1442 assert(0 <= view->offset && view->offset < view->lines);
1443 assert(lines);
b801d8b2 1444
a0087dd5
JF		 1445 /* Move current line into the view. */
1446 if (view->lineno < view->offset) {
1447 view->lineno = view->offset;
1448 redraw_current_line = TRUE;
1449 } else if (view->lineno >= view->offset + view->height) {
1450 view->lineno = view->offset + view->height - 1;
1451 redraw_current_line = TRUE;
1452 }
1453
1454 assert(view->offset <= view->lineno && view->lineno < view->lines);
1455
82e78006 1456 /* Redraw the whole screen if scrolling is pointless. */
4c6fabc2 1457 if (view->height < ABS(lines)) {
b76c2afc
JF		 1458 redraw_view(view);
1459
1460 } else {
22f66b0a 1461 int line = lines > 0 ? view->height - lines : 0;
82e78006 1462 int end = line + ABS(lines);
fd85fef1
JF		 1463
1464 wscrl(view->win, lines);
1465
22f66b0a 1466 for (; line < end; line++) {
fe7233c3 1467 if (!draw_view_line(view, line))
fd85fef1
JF		 1468 break;
1469 }
fd85fef1 1470
a0087dd5
JF		 1471 if (redraw_current_line)
1472 draw_view_line(view, view->lineno - view->offset);
fd85fef1
JF		 1473 }
1474
fd85fef1
JF		 1475 redrawwin(view->win);
1476 wrefresh(view->win);
9d3f5834 1477 report("");
fd85fef1 1478}
78c70acd 1479
4a2909a7 1480/* Scroll frontend */
fd85fef1 1481static void
6b161b31 1482scroll_view(struct view *view, enum request request)
fd85fef1
JF		 1483{
1484 int lines = 1;
b801d8b2 1485
8c317212
JF		 1486 assert(view_is_displayed(view));
1487
b801d8b2 1488 switch (request) {
4a2909a7 1489 case REQ_SCROLL_PAGE_DOWN:
fd85fef1 1490 lines = view->height;
4a2909a7 1491 case REQ_SCROLL_LINE_DOWN:
b801d8b2 1492 if (view->offset + lines > view->lines)
bde3653a 1493 lines = view->lines - view->offset;
b801d8b2 1494
fd85fef1 1495 if (lines == 0 || view->offset + view->height >= view->lines) {
eb98559e 1496 report("Cannot scroll beyond the last line");
b801d8b2
JF		 1497 return;
1498 }
1499 break;
1500
4a2909a7 1501 case REQ_SCROLL_PAGE_UP:
fd85fef1 1502 lines = view->height;
4a2909a7 1503 case REQ_SCROLL_LINE_UP:
b801d8b2
JF		 1504 if (lines > view->offset)
1505 lines = view->offset;
1506
1507 if (lines == 0) {
eb98559e 1508 report("Cannot scroll beyond the first line");
b801d8b2
JF		 1509 return;
1510 }
1511
fd85fef1 1512 lines = -lines;
b801d8b2 1513 break;
03a93dbb 1514
6b161b31
JF		 1515 default:
1516 die("request %d not handled in switch", request);
b801d8b2
JF		 1517 }
1518
8c317212 1519 do_scroll_view(view, lines);
fd85fef1 1520}
b801d8b2 1521
4a2909a7 1522/* Cursor moving */
fd85fef1 1523static void
8522ecc7 1524move_view(struct view *view, enum request request)
fd85fef1 1525{
8522ecc7 1526 bool scroll = FALSE;
fd85fef1 1527 int steps;
b801d8b2 1528
fd85fef1 1529 switch (request) {
4a2909a7 1530 case REQ_MOVE_FIRST_LINE:
78c70acd
JF		 1531 steps = -view->lineno;
1532 break;
1533
4a2909a7 1534 case REQ_MOVE_LAST_LINE:
78c70acd
JF		 1535 steps = view->lines - view->lineno - 1;
1536 break;
1537
4a2909a7 1538 case REQ_MOVE_PAGE_UP:
78c70acd
JF		 1539 steps = view->height > view->lineno
1540 ? -view->lineno : -view->height;
1541 break;
1542
4a2909a7 1543 case REQ_MOVE_PAGE_DOWN:
78c70acd
JF		 1544 steps = view->lineno + view->height >= view->lines
1545 ? view->lines - view->lineno - 1 : view->height;
1546 break;
1547
4a2909a7 1548 case REQ_MOVE_UP:
fd85fef1
JF		 1549 steps = -1;
1550 break;
b801d8b2 1551
4a2909a7 1552 case REQ_MOVE_DOWN:
fd85fef1
JF		 1553 steps = 1;
1554 break;
6b161b31
JF		 1555
1556 default:
1557 die("request %d not handled in switch", request);
78c70acd 1558 }
b801d8b2 1559
4c6fabc2 1560 if (steps <= 0 && view->lineno == 0) {
eb98559e 1561 report("Cannot move beyond the first line");
78c70acd 1562 return;
b801d8b2 1563
6908bdbd 1564 } else if (steps >= 0 && view->lineno + 1 >= view->lines) {
eb98559e 1565 report("Cannot move beyond the last line");
78c70acd 1566 return;
fd85fef1
JF		 1567 }
1568
4c6fabc2 1569 /* Move the current line */
fd85fef1 1570 view->lineno += steps;
4c6fabc2
JF		 1571 assert(0 <= view->lineno && view->lineno < view->lines);
1572
4c6fabc2 1573 /* Check whether the view needs to be scrolled */
fd85fef1
JF		 1574 if (view->lineno < view->offset ||
1575 view->lineno >= view->offset + view->height) {
1576 if (steps < 0 && -steps > view->offset) {
1577 steps = -view->offset;
b76c2afc
JF		 1578
1579 } else if (steps > 0) {
1580 if (view->lineno == view->lines - 1 &&
1581 view->lines > view->height) {
1582 steps = view->lines - view->offset - 1;
1583 if (steps >= view->height)
1584 steps -= view->height - 1;
1585 }
b801d8b2 1586 }
78c70acd 1587
8522ecc7
JF		 1588 scroll = TRUE;
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
1601 if (scroll) {
8c317212 1602 do_scroll_view(view, 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{
2560 enum open_flags flags = OPEN_DEFAULT;
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:
2595 /* This causes the blob view to become split, and not having it
2596 * in the tree dir case will make the blob view automatically
2597 * disappear when moving to a different directory. */
2598 flags |= OPEN_SPLIT;
2599 request = REQ_VIEW_BLOB;
2600 break;
2601
2602 default:
2603 return TRUE;
2604 }
2605
2606 open_view(view, request, flags);
2607
2608 if (!VIEW(request)->pipe)
2609 return TRUE;
2610
2611 /* For tree views insert the path to the parent as the first line. */
2612 if (request == REQ_VIEW_BLOB) {
2613 /* Mirror what is showed in the title bar. */
2614 string_ncopy(ref_blob, data + STRING_SIZE("100644 blob "), 40);
2615 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2616 return TRUE;
2617 }
2618
2619 return TRUE;
2620}
2621
d720de4b
JF		 2622static void
2623tree_select(struct view *view, struct line *line)
2624{
2625 if (line->type == LINE_TREE_DIR || line->type == LINE_TREE_FILE) {
2626 char *text = line->data;
2627
2628 string_ncopy(view->ref, text + STRING_SIZE("100644 blob "), 40);
2629 string_copy(ref_blob, view->ref);
2630 }
2631}
2632
e733ee54
JF		 2633static struct view_ops tree_ops = {
2634 "file",
2635 pager_draw,
2636 tree_read,
2637 tree_enter,
2638 pager_grep,
d720de4b 2639 tree_select,
e733ee54
JF		 2640};
2641
2642static bool
2643blob_read(struct view *view, char *line)
2644{
2645 bool state = pager_read(view, line);
2646
2647 if (state == TRUE)
2648 view->line[view->lines - 1].type = LINE_DEFAULT;
2649
2650 return state;
2651}
2652
2653static struct view_ops blob_ops = {
2654 "line",
2655 pager_draw,
2656 blob_read,
2657 pager_enter,
2658 pager_grep,
d720de4b 2659 pager_select,
e733ee54
JF		 2660};
2661
2662
2663/*
ff26aa29
JF		 2664 * Main view backend
2665 */
2666
2667struct commit {
54efb62b
JF		 2668 char id[41]; /* SHA1 ID. */
2669 char title[75]; /* First line of the commit message. */
2670 char author[75]; /* Author of the commit. */
2671 struct tm time; /* Date from the author ident. */
2672 struct ref **refs; /* Repository references. */
2673 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2674 size_t graph_size; /* The width of the graph array. */
ff26aa29 2675};
c34d9c9f 2676
6b161b31 2677static bool
5dcf8064 2678main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
22f66b0a 2679{
2e8488b4 2680 char buf[DATE_COLS + 1];
fe7233c3 2681 struct commit *commit = line->data;
78c70acd 2682 enum line_type type;
6706b2ba 2683 int col = 0;
b76c2afc 2684 size_t timelen;
10e290ee 2685 size_t authorlen;
9989bf60 2686 int trimmed = 1;
22f66b0a 2687
4c6fabc2
JF		 2688 if (!*commit->author)
2689 return FALSE;
22f66b0a 2690
6706b2ba
JF		 2691 wmove(view->win, lineno, col);
2692
5dcf8064 2693 if (selected) {
78c70acd 2694 type = LINE_CURSOR;
6706b2ba
JF		 2695 wattrset(view->win, get_line_attr(type));
2696 wchgat(view->win, -1, 0, type, NULL);
2697
78c70acd 2698 } else {
b76c2afc 2699 type = LINE_MAIN_COMMIT;
6706b2ba 2700 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
b76c2afc
JF		 2701 }
2702
4c6fabc2 2703 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
b76c2afc 2704 waddnstr(view->win, buf, timelen);
4c6fabc2 2705 waddstr(view->win, " ");
b76c2afc 2706
6706b2ba
JF		 2707 col += DATE_COLS;
2708 wmove(view->win, lineno, col);
2709 if (type != LINE_CURSOR)
2710 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
b76c2afc 2711
9989bf60
JF		 2712 if (opt_utf8) {
2713 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2714 } else {
2715 authorlen = strlen(commit->author);
2716 if (authorlen > AUTHOR_COLS - 2) {
2717 authorlen = AUTHOR_COLS - 2;
2718 trimmed = 1;
2719 }
2720 }
10e290ee
JF		 2721
2722 if (trimmed) {
2723 waddnstr(view->win, commit->author, authorlen);
6706b2ba
JF		 2724 if (type != LINE_CURSOR)
2725 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
b76c2afc
JF		 2726 waddch(view->win, '~');
2727 } else {
2728 waddstr(view->win, commit->author);
22f66b0a
JF		 2729 }
2730
10e290ee 2731 col += AUTHOR_COLS;
6706b2ba
JF		 2732 if (type != LINE_CURSOR)
2733 wattrset(view->win, A_NORMAL);
2734
54efb62b
JF		 2735 if (opt_rev_graph && commit->graph_size) {
2736 size_t i;
2737
2738 wmove(view->win, lineno, col);
2739 /* Using waddch() instead of waddnstr() ensures that
2740 * they'll be rendered correctly for the cursor line. */
2741 for (i = 0; i < commit->graph_size; i++)
2742 waddch(view->win, commit->graph[i]);
2743
2744 col += commit->graph_size + 1;
2745 }
2746
2747 wmove(view->win, lineno, col);
c34d9c9f
JF		 2748
2749 if (commit->refs) {
2750 size_t i = 0;
2751
2752 do {
6706b2ba
JF		 2753 if (type == LINE_CURSOR)
2754 ;
2755 else if (commit->refs[i]->tag)
c34d9c9f
JF		 2756 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2757 else
2758 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2759 waddstr(view->win, "[");
2760 waddstr(view->win, commit->refs[i]->name);
2761 waddstr(view->win, "]");
6706b2ba
JF		 2762 if (type != LINE_CURSOR)
2763 wattrset(view->win, A_NORMAL);
c34d9c9f 2764 waddstr(view->win, " ");
6706b2ba 2765 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
c34d9c9f
JF		 2766 } while (commit->refs[i++]->next);
2767 }
2768
6706b2ba
JF		 2769 if (type != LINE_CURSOR)
2770 wattrset(view->win, get_line_attr(type));
2771
2772 {
2773 int titlelen = strlen(commit->title);
2774
2775 if (col + titlelen > view->width)
2776 titlelen = view->width - col;
2777
2778 waddnstr(view->win, commit->title, titlelen);
2779 }
22f66b0a
JF		 2780
2781 return TRUE;
2782}
2783
4c6fabc2 2784/* Reads git log --pretty=raw output and parses it into the commit struct. */
6b161b31 2785static bool
701e4f5d 2786main_read(struct view *view, char *line)
22f66b0a 2787{
78c70acd 2788 enum line_type type = get_line_type(line);
701e4f5d
JF		 2789 struct commit *commit = view->lines
2790 ? view->line[view->lines - 1].data : NULL;
22f66b0a 2791
78c70acd
JF		 2792 switch (type) {
2793 case LINE_COMMIT:
22f66b0a
JF		 2794 commit = calloc(1, sizeof(struct commit));
2795 if (!commit)
2796 return FALSE;
2797
4c6fabc2 2798 line += STRING_SIZE("commit ");
b76c2afc 2799
fe7233c3 2800 view->line[view->lines++].data = commit;
82e78006 2801 string_copy(commit->id, line);
c34d9c9f 2802 commit->refs = get_refs(commit->id);
54efb62b 2803 commit->graph[commit->graph_size++] = ACS_LTEE;
78c70acd 2804 break;
22f66b0a 2805
8855ada4 2806 case LINE_AUTHOR:
b76c2afc 2807 {
4c6fabc2 2808 char *ident = line + STRING_SIZE("author ");
b76c2afc
JF		 2809 char *end = strchr(ident, '<');
2810
701e4f5d 2811 if (!commit)
fe7233c3
JF		 2812 break;
2813
b76c2afc 2814 if (end) {
cbbf2d1b
JF		 2815 char *email = end + 1;
2816
b76c2afc 2817 for (; end > ident && isspace(end[-1]); end--) ;
cbbf2d1b
JF		 2818
2819 if (end == ident && *email) {
2820 ident = email;
2821 end = strchr(ident, '>');
2822 for (; end > ident && isspace(end[-1]); end--) ;
2823 }
b76c2afc
JF		 2824 *end = 0;
2825 }
2826
cbbf2d1b
JF		 2827 /* End is NULL or ident meaning there's no author. */
2828 if (end <= ident)
2829 ident = "Unknown";
2830
82e78006 2831 string_copy(commit->author, ident);
b76c2afc 2832
4c6fabc2 2833 /* Parse epoch and timezone */
b76c2afc
JF		 2834 if (end) {
2835 char *secs = strchr(end + 1, '>');
2836 char *zone;
2837 time_t time;
2838
2839 if (!secs || secs[1] != ' ')
2840 break;
2841
2842 secs += 2;
2843 time = (time_t) atol(secs);
2844 zone = strchr(secs, ' ');
4c6fabc2 2845 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
b76c2afc
JF		 2846 long tz;
2847
2848 zone++;
2849 tz = ('0' - zone[1]) * 60 * 60 * 10;
2850 tz += ('0' - zone[2]) * 60 * 60;
2851 tz += ('0' - zone[3]) * 60;
2852 tz += ('0' - zone[4]) * 60;
2853
2854 if (zone[0] == '-')
2855 tz = -tz;
2856
2857 time -= tz;
2858 }
2859 gmtime_r(&time, &commit->time);
2860 }
2861 break;
2862 }
78c70acd 2863 default:
701e4f5d 2864 if (!commit)
2e8488b4
JF		 2865 break;
2866
2867 /* Fill in the commit title if it has not already been set. */
2e8488b4
JF		 2868 if (commit->title[0])
2869 break;
2870
2871 /* Require titles to start with a non-space character at the
2872 * offset used by git log. */
eb98559e
JF		 2873 /* FIXME: More gracefull handling of titles; append "..." to
2874 * shortened titles, etc. */
2e8488b4 2875 if (strncmp(line, " ", 4) ||
eb98559e 2876 isspace(line[4]))
82e78006
JF		 2877 break;
2878
2879 string_copy(commit->title, line + 4);
22f66b0a
JF		 2880 }
2881
2882 return TRUE;
2883}
2884
6b161b31 2885static bool
fe7233c3 2886main_enter(struct view *view, struct line *line)
b801d8b2 2887{
b3a54cba
JF		 2888 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2889
2890 open_view(view, REQ_VIEW_DIFF, flags);
6b161b31 2891 return TRUE;
b801d8b2
JF		 2892}
2893
4af34daa
JF		 2894static bool
2895main_grep(struct view *view, struct line *line)
2896{
2897 struct commit *commit = line->data;
2898 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2899 char buf[DATE_COLS + 1];
2900 regmatch_t pmatch;
2901
2902 for (state = S_TITLE; state < S_END; state++) {
2903 char *text;
2904
2905 switch (state) {
2906 case S_TITLE: text = commit->title; break;
2907 case S_AUTHOR: text = commit->author; break;
2908 case S_DATE:
2909 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2910 continue;
2911 text = buf;
2912 break;
2913
2914 default:
2915 return FALSE;
2916 }
2917
b77b2cb8 2918 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4af34daa
JF		 2919 return TRUE;
2920 }
2921
2922 return FALSE;
2923}
2924
d720de4b
JF		 2925static void
2926main_select(struct view *view, struct line *line)
2927{
2928 struct commit *commit = line->data;
2929
2930 string_copy(view->ref, commit->id);
2931 string_copy(ref_commit, view->ref);
2932}
2933
6b161b31 2934static struct view_ops main_ops = {
6734f6b9 2935 "commit",
6b161b31
JF		 2936 main_draw,
2937 main_read,
2938 main_enter,
4af34daa 2939 main_grep,
d720de4b 2940 main_select,
6b161b31 2941};
2e8488b4 2942
c34d9c9f 2943
6b161b31 2944/*
10e290ee
JF		 2945 * Unicode / UTF-8 handling
2946 *
2947 * NOTE: Much of the following code for dealing with unicode is derived from
2948 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2949 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2950 */
2951
2952/* I've (over)annotated a lot of code snippets because I am not entirely
2953 * confident that the approach taken by this small UTF-8 interface is correct.
2954 * --jonas */
2955
2956static inline int
2957unicode_width(unsigned long c)
2958{
2959 if (c >= 0x1100 &&
2960 (c <= 0x115f /* Hangul Jamo */
2961 || c == 0x2329
2962 || c == 0x232a
2963 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
f97f4012 2964 /* CJK ... Yi */
10e290ee
JF		 2965 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2966 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2967 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2968 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2969 || (c >= 0xffe0 && c <= 0xffe6)
2970 || (c >= 0x20000 && c <= 0x2fffd)
2971 || (c >= 0x30000 && c <= 0x3fffd)))
2972 return 2;
2973
2974 return 1;
2975}
2976
2977/* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2978 * Illegal bytes are set one. */
2979static const unsigned char utf8_bytes[256] = {
2980 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2981 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2982 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2983 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2984 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2985 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,
2986 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,
2987 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,
2988};
2989
2990/* Decode UTF-8 multi-byte representation into a unicode character. */
2991static inline unsigned long
2992utf8_to_unicode(const char *string, size_t length)
2993{
2994 unsigned long unicode;
2995
2996 switch (length) {
2997 case 1:
2998 unicode = string[0];
2999 break;
3000 case 2:
3001 unicode = (string[0] & 0x1f) << 6;
3002 unicode += (string[1] & 0x3f);
3003 break;
3004 case 3:
3005 unicode = (string[0] & 0x0f) << 12;
3006 unicode += ((string[1] & 0x3f) << 6);
3007 unicode += (string[2] & 0x3f);
3008 break;
3009 case 4:
3010 unicode = (string[0] & 0x0f) << 18;
3011 unicode += ((string[1] & 0x3f) << 12);
3012 unicode += ((string[2] & 0x3f) << 6);
3013 unicode += (string[3] & 0x3f);
3014 break;
3015 case 5:
3016 unicode = (string[0] & 0x0f) << 24;
3017 unicode += ((string[1] & 0x3f) << 18);
3018 unicode += ((string[2] & 0x3f) << 12);
3019 unicode += ((string[3] & 0x3f) << 6);
3020 unicode += (string[4] & 0x3f);
3021 break;
68b6e0eb 3022 case 6:
10e290ee
JF		 3023 unicode = (string[0] & 0x01) << 30;
3024 unicode += ((string[1] & 0x3f) << 24);
3025 unicode += ((string[2] & 0x3f) << 18);
3026 unicode += ((string[3] & 0x3f) << 12);
3027 unicode += ((string[4] & 0x3f) << 6);
3028 unicode += (string[5] & 0x3f);
3029 break;
3030 default:
3031 die("Invalid unicode length");
3032 }
3033
3034 /* Invalid characters could return the special 0xfffd value but NUL
3035 * should be just as good. */
3036 return unicode > 0xffff ? 0 : unicode;
3037}
3038
3039/* Calculates how much of string can be shown within the given maximum width
3040 * and sets trimmed parameter to non-zero value if all of string could not be
3041 * shown.
3042 *
3043 * Additionally, adds to coloffset how many many columns to move to align with
3044 * the expected position. Takes into account how multi-byte and double-width
3045 * characters will effect the cursor position.
3046 *
3047 * Returns the number of bytes to output from string to satisfy max_width. */
3048static size_t
3049utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3050{
3051 const char *start = string;
3052 const char *end = strchr(string, '\0');
3053 size_t mbwidth = 0;
3054 size_t width = 0;
3055
3056 *trimmed = 0;
3057
3058 while (string < end) {
3059 int c = *(unsigned char *) string;
3060 unsigned char bytes = utf8_bytes[c];
3061 size_t ucwidth;
3062 unsigned long unicode;
3063
3064 if (string + bytes > end)
3065 break;
3066
3067 /* Change representation to figure out whether
3068 * it is a single- or double-width character. */
3069
3070 unicode = utf8_to_unicode(string, bytes);
3071 /* FIXME: Graceful handling of invalid unicode character. */
3072 if (!unicode)
3073 break;
3074
3075 ucwidth = unicode_width(unicode);
3076 width += ucwidth;
3077 if (width > max_width) {
3078 *trimmed = 1;
3079 break;
3080 }
3081
3082 /* The column offset collects the differences between the
3083 * number of bytes encoding a character and the number of
3084 * columns will be used for rendering said character.
3085 *
3086 * So if some character A is encoded in 2 bytes, but will be
3087 * represented on the screen using only 1 byte this will and up
3088 * adding 1 to the multi-byte column offset.
3089 *
3090 * Assumes that no double-width character can be encoding in
3091 * less than two bytes. */
3092 if (bytes > ucwidth)
3093 mbwidth += bytes - ucwidth;
3094
3095 string += bytes;
3096 }
3097
3098 *coloffset += mbwidth;
3099
3100 return string - start;
3101}
3102
3103
3104/*
6b161b31
JF		 3105 * Status management
3106 */
2e8488b4 3107
8855ada4 3108/* Whether or not the curses interface has been initialized. */
68b6e0eb 3109static bool cursed = FALSE;
8855ada4 3110
6b161b31
JF		 3111/* The status window is used for polling keystrokes. */
3112static WINDOW *status_win;
4a2909a7 3113
2e8488b4 3114/* Update status and title window. */
4a2909a7
JF		 3115static void
3116report(const char *msg, ...)
3117{
6706b2ba
JF		 3118 static bool empty = TRUE;
3119 struct view *view = display[current_view];
b76c2afc 3120
6706b2ba
JF		 3121 if (!empty || *msg) {
3122 va_list args;
4a2909a7 3123
6706b2ba 3124 va_start(args, msg);
4b76734f 3125
6706b2ba
JF		 3126 werase(status_win);
3127 wmove(status_win, 0, 0);
3128 if (*msg) {
3129 vwprintw(status_win, msg, args);
3130 empty = FALSE;
3131 } else {
3132 empty = TRUE;
3133 }
3134 wrefresh(status_win);
b801d8b2 3135
6706b2ba
JF		 3136 va_end(args);
3137 }
3138
3139 update_view_title(view);
85af6284 3140 update_display_cursor();
b801d8b2
JF		 3141}
3142
6b161b31
JF		 3143/* Controls when nodelay should be in effect when polling user input. */
3144static void
1ba2ae4b 3145set_nonblocking_input(bool loading)
b801d8b2 3146{
6706b2ba 3147 static unsigned int loading_views;
b801d8b2 3148
6706b2ba
JF		 3149 if ((loading == FALSE && loading_views-- == 1) ||
3150 (loading == TRUE && loading_views++ == 0))
1ba2ae4b 3151 nodelay(status_win, loading);
6b161b31
JF		 3152}
3153
3154static void
3155init_display(void)
3156{
3157 int x, y;
b76c2afc 3158
6908bdbd
JF		 3159 /* Initialize the curses library */
3160 if (isatty(STDIN_FILENO)) {
8855ada4 3161 cursed = !!initscr();
6908bdbd
JF		 3162 } else {
3163 /* Leave stdin and stdout alone when acting as a pager. */
3164 FILE *io = fopen("/dev/tty", "r+");
3165
e6f60674
JF		 3166 if (!io)
3167 die("Failed to open /dev/tty");
8855ada4 3168 cursed = !!newterm(NULL, io, io);
6908bdbd
JF		 3169 }
3170
8855ada4
JF		 3171 if (!cursed)
3172 die("Failed to initialize curses");
3173
2e8488b4
JF		 3174 nonl(); /* Tell curses not to do NL->CR/NL on output */
3175 cbreak(); /* Take input chars one at a time, no wait for \n */
3176 noecho(); /* Don't echo input */
b801d8b2 3177 leaveok(stdscr, TRUE);
b801d8b2
JF		 3178
3179 if (has_colors())
3180 init_colors();
3181
3182 getmaxyx(stdscr, y, x);
3183 status_win = newwin(1, 0, y - 1, 0);
3184 if (!status_win)
3185 die("Failed to create status window");
3186
3187 /* Enable keyboard mapping */
3188 keypad(status_win, TRUE);
78c70acd 3189 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6b161b31
JF		 3190}
3191
4af34daa 3192static char *
cb9e48c1 3193read_prompt(const char *prompt)
ef5404a4
JF		 3194{
3195 enum { READING, STOP, CANCEL } status = READING;
9e21ce5c 3196 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
ef5404a4
JF		 3197 int pos = 0;
3198
3199 while (status == READING) {
3200 struct view *view;
3201 int i, key;
3202
699ae55b 3203 foreach_view (view, i)
ef5404a4
JF		 3204 update_view(view);
3205
cb9e48c1 3206 report("%s%.*s", prompt, pos, buf);
ef5404a4
JF		 3207 /* Refresh, accept single keystroke of input */
3208 key = wgetch(status_win);
3209 switch (key) {
3210 case KEY_RETURN:
3211 case KEY_ENTER:
3212 case '\n':
3213 status = pos ? STOP : CANCEL;
3214 break;
3215
3216 case KEY_BACKSPACE:
3217 if (pos > 0)
3218 pos--;
3219 else
3220 status = CANCEL;
3221 break;
3222
3223 case KEY_ESC:
3224 status = CANCEL;
3225 break;
3226
3227 case ERR:
3228 break;
3229
3230 default:
3231 if (pos >= sizeof(buf)) {
3232 report("Input string too long");
9e21ce5c 3233 return NULL;
ef5404a4
JF		 3234 }
3235
3236 if (isprint(key))
3237 buf[pos++] = (char) key;
3238 }
3239 }
3240
3241 if (status == CANCEL) {
3242 /* Clear the status window */
3243 report("");
9e21ce5c 3244 return NULL;
ef5404a4
JF		 3245 }
3246
3247 buf[pos++] = 0;
ef5404a4 3248
9e21ce5c 3249 return buf;
ef5404a4 3250}
c34d9c9f
JF		 3251
3252/*
3253 * Repository references
3254 */
3255
3256static struct ref *refs;
3a91b75e 3257static size_t refs_size;
c34d9c9f 3258
1307df1a
JF		 3259/* Id <-> ref store */
3260static struct ref ***id_refs;
3261static size_t id_refs_size;
3262
c34d9c9f
JF		 3263static struct ref **
3264get_refs(char *id)
3265{
1307df1a
JF		 3266 struct ref ***tmp_id_refs;
3267 struct ref **ref_list = NULL;
3268 size_t ref_list_size = 0;
c34d9c9f
JF		 3269 size_t i;
3270
1307df1a
JF		 3271 for (i = 0; i < id_refs_size; i++)
3272 if (!strcmp(id, id_refs[i][0]->id))
3273 return id_refs[i];
3274
3275 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3276 if (!tmp_id_refs)
3277 return NULL;
3278
3279 id_refs = tmp_id_refs;
3280
c34d9c9f
JF		 3281 for (i = 0; i < refs_size; i++) {
3282 struct ref **tmp;
3283
3284 if (strcmp(id, refs[i].id))
3285 continue;
3286
1307df1a 3287 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
c34d9c9f 3288 if (!tmp) {
1307df1a
JF		 3289 if (ref_list)
3290 free(ref_list);
c34d9c9f
JF		 3291 return NULL;
3292 }
3293
1307df1a
JF		 3294 ref_list = tmp;
3295 if (ref_list_size > 0)
3296 ref_list[ref_list_size - 1]->next = 1;
3297 ref_list[ref_list_size] = &refs[i];
3af8774e
JF		 3298
3299 /* XXX: The properties of the commit chains ensures that we can
3300 * safely modify the shared ref. The repo references will
3301 * always be similar for the same id. */
1307df1a
JF		 3302 ref_list[ref_list_size]->next = 0;
3303 ref_list_size++;
c34d9c9f
JF		 3304 }
3305
1307df1a
JF		 3306 if (ref_list)
3307 id_refs[id_refs_size++] = ref_list;
3308
3309 return ref_list;
c34d9c9f
JF		 3310}
3311
3312static int
d0cea5f9 3313read_ref(char *id, int idlen, char *name, int namelen)
c34d9c9f 3314{
d0cea5f9
JF		 3315 struct ref *ref;
3316 bool tag = FALSE;
d0cea5f9 3317
8b0297ae
JF		 3318 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3319 /* Commits referenced by tags has "^{}" appended. */
3320 if (name[namelen - 1] != '}')
3321 return OK;
3322
d0cea5f9
JF		 3323 while (namelen > 0 && name[namelen] != '^')
3324 namelen--;
c34d9c9f 3325
d0cea5f9 3326 tag = TRUE;
8b0297ae
JF		 3327 namelen -= STRING_SIZE("refs/tags/");
3328 name += STRING_SIZE("refs/tags/");
c34d9c9f 3329
d0cea5f9 3330 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
8b0297ae
JF		 3331 namelen -= STRING_SIZE("refs/heads/");
3332 name += STRING_SIZE("refs/heads/");
c34d9c9f 3333
d0cea5f9
JF		 3334 } else if (!strcmp(name, "HEAD")) {
3335 return OK;
3336 }
6706b2ba 3337
d0cea5f9
JF		 3338 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3339 if (!refs)
3340 return ERR;
c34d9c9f 3341
d0cea5f9 3342 ref = &refs[refs_size++];
8b0297ae 3343 ref->name = malloc(namelen + 1);
d0cea5f9
JF		 3344 if (!ref->name)
3345 return ERR;
3af8774e 3346
8b0297ae
JF		 3347 strncpy(ref->name, name, namelen);
3348 ref->name[namelen] = 0;
d0cea5f9
JF		 3349 ref->tag = tag;
3350 string_copy(ref->id, id);
3af8774e 3351
d0cea5f9
JF		 3352 return OK;
3353}
c34d9c9f 3354
d0cea5f9
JF		 3355static int
3356load_refs(void)
3357{
3358 const char *cmd_env = getenv("TIG_LS_REMOTE");
3359 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
c34d9c9f 3360
4a63c884 3361 return read_properties(popen(cmd, "r"), "\t", read_ref);
d0cea5f9 3362}
c34d9c9f 3363
d0cea5f9 3364static int
14c778a6 3365read_repo_config_option(char *name, int namelen, char *value, int valuelen)
d0cea5f9 3366{
22913179 3367 if (!strcmp(name, "i18n.commitencoding"))
d0cea5f9 3368 string_copy(opt_encoding, value);
c34d9c9f 3369
c34d9c9f
JF		 3370 return OK;
3371}
3372
4670cf89 3373static int
14c778a6 3374load_repo_config(void)
4670cf89 3375{
66749723 3376 return read_properties(popen("git repo-config --list", "r"),
14c778a6 3377 "=", read_repo_config_option);
d0cea5f9
JF		 3378}
3379
3380static int
4a63c884 3381read_properties(FILE *pipe, const char *separators,
d0cea5f9
JF		 3382 int (*read_property)(char *, int, char *, int))
3383{
4670cf89
JF		 3384 char buffer[BUFSIZ];
3385 char *name;
d0cea5f9 3386 int state = OK;
4670cf89
JF		 3387
3388 if (!pipe)
3389 return ERR;
3390
d0cea5f9 3391 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4a63c884
JF		 3392 char *value;
3393 size_t namelen;
3394 size_t valuelen;
4670cf89 3395
4a63c884
JF		 3396 name = chomp_string(name);
3397 namelen = strcspn(name, separators);
3398
3399 if (name[namelen]) {
3400 name[namelen] = 0;
3401 value = chomp_string(name + namelen + 1);
d0cea5f9 3402 valuelen = strlen(value);
4670cf89 3403
d0cea5f9 3404 } else {
d0cea5f9
JF		 3405 value = "";
3406 valuelen = 0;
4670cf89 3407 }
d0cea5f9 3408
3c3801c2 3409 state = read_property(name, namelen, value, valuelen);
4670cf89
JF		 3410 }
3411
d0cea5f9
JF		 3412 if (state != ERR && ferror(pipe))
3413 state = ERR;
4670cf89
JF		 3414
3415 pclose(pipe);
3416
d0cea5f9 3417 return state;
4670cf89
JF		 3418}
3419
d0cea5f9 3420
6b161b31
JF		 3421/*
3422 * Main
3423 */
3424
b5c9e67f 3425static void __NORETURN
6b161b31
JF		 3426quit(int sig)
3427{
8855ada4
JF		 3428 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3429 if (cursed)
3430 endwin();
6b161b31
JF		 3431 exit(0);
3432}
3433
c6704a4e
JF		 3434static void __NORETURN
3435die(const char *err, ...)
6b161b31
JF		 3436{
3437 va_list args;
3438
3439 endwin();
3440
3441 va_start(args, err);
3442 fputs("tig: ", stderr);
3443 vfprintf(stderr, err, args);
3444 fputs("\n", stderr);
3445 va_end(args);
3446
3447 exit(1);
3448}
3449
3450int
3451main(int argc, char *argv[])
3452{
1ba2ae4b 3453 struct view *view;
6b161b31 3454 enum request request;
1ba2ae4b 3455 size_t i;
6b161b31
JF		 3456
3457 signal(SIGINT, quit);
3458
6b68fd24
JF		 3459 if (setlocale(LC_ALL, "")) {
3460 string_copy(opt_codeset, nl_langinfo(CODESET));
3461 }
3462
660e09ad
JF		 3463 if (load_options() == ERR)
3464 die("Failed to load user config.");
3465
3466 /* Load the repo config file so options can be overwritten from
afdc35b3 3467 * the command line. */
14c778a6 3468 if (load_repo_config() == ERR)
afdc35b3
JF		 3469 die("Failed to load repo config.");
3470
8855ada4 3471 if (!parse_options(argc, argv))
6b161b31
JF		 3472 return 0;
3473
6b68fd24
JF		 3474 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3475 opt_iconv = iconv_open(opt_codeset, opt_encoding);
20f4b4a3 3476 if (opt_iconv == ICONV_NONE)
6b68fd24
JF		 3477 die("Failed to initialize character set conversion");
3478 }
3479
c34d9c9f
JF		 3480 if (load_refs() == ERR)
3481 die("Failed to load refs.");
3482
7bb55251
JF		 3483 /* Require a git repository unless when running in pager mode. */
3484 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3485 die("Not a git repository");
3486
1ba2ae4b
JF		 3487 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3488 view->cmd_env = getenv(view->cmd_env);
3489
6b161b31
JF		 3490 request = opt_request;
3491
3492 init_display();
b801d8b2
JF		 3493
3494 while (view_driver(display[current_view], request)) {
6b161b31 3495 int key;
b801d8b2
JF		 3496 int i;
3497
699ae55b 3498 foreach_view (view, i)
6b161b31 3499 update_view(view);
b801d8b2
JF		 3500
3501 /* Refresh, accept single keystroke of input */
6b161b31 3502 key = wgetch(status_win);
04e2b7b2
JF		 3503
3504 request = get_keybinding(display[current_view]->keymap, key);
03a93dbb 3505
6706b2ba 3506 /* Some low-level request handling. This keeps access to
fac7db6c
JF		 3507 * status_win restricted. */
3508 switch (request) {
3509 case REQ_PROMPT:
9e21ce5c
JF		 3510 {
3511 char *cmd = read_prompt(":");
3512
3513 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3514 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3515 opt_request = REQ_VIEW_DIFF;
3516 } else {
3517 opt_request = REQ_VIEW_PAGER;
3518 }
3519 break;
3520 }
fac7db6c 3521
1d754561 3522 request = REQ_NONE;
9e21ce5c
JF		 3523 break;
3524 }
4af34daa
JF		 3525 case REQ_SEARCH:
3526 case REQ_SEARCH_BACK:
3527 {
3528 const char *prompt = request == REQ_SEARCH
3529 ? "/" : "?";
3530 char *search = read_prompt(prompt);
3531
3532 if (search)
3533 string_copy(opt_search, search);
3534 else
3535 request = REQ_NONE;
3536 break;
3537 }
fac7db6c
JF		 3538 case REQ_SCREEN_RESIZE:
3539 {
3540 int height, width;
3541
3542 getmaxyx(stdscr, height, width);
3543
3544 /* Resize the status view and let the view driver take
3545 * care of resizing the displayed views. */
3546 wresize(status_win, 1, width);
3547 mvwin(status_win, height - 1, 0);
3548 wrefresh(status_win);
3549 break;
3550 }
3551 default:
3552 break;
03a93dbb 3553 }
b801d8b2
JF		 3554 }
3555
3556 quit(0);
3557
3558 return 0;
3559}
Full-screen terminal Git browser.