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Fix redrawing of old current line
[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{
dfaa6c81 1526 int scroll_steps = 0;
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) {
dfaa6c81 1576 scroll_steps = steps;
fd85fef1 1577 if (steps < 0 && -steps > view->offset) {
dfaa6c81 1578 scroll_steps = -view->offset;
b76c2afc
JF		 1579
1580 } else if (steps > 0) {
1581 if (view->lineno == view->lines - 1 &&
1582 view->lines > view->height) {
dfaa6c81
JF		 1583 scroll_steps = view->lines - view->offset - 1;
1584 if (scroll_steps >= view->height)
1585 scroll_steps -= view->height - 1;
b76c2afc 1586 }
b801d8b2 1587 }
8522ecc7
JF		 1588 }
1589
1590 if (!view_is_displayed(view)) {
1591 view->offset += steps;
1592 view->ops->select(view, &view->line[view->lineno]);
1593 return;
1594 }
1595
1596 /* Repaint the old "current" line if we be scrolling */
1597 if (ABS(steps) < view->height)
1598 draw_view_line(view, view->lineno - steps - view->offset);
1599
dfaa6c81
JF		 1600 if (scroll_steps) {
1601 do_scroll_view(view, scroll_steps);
fd85fef1 1602 return;
b801d8b2
JF		 1603 }
1604
4c6fabc2 1605 /* Draw the current line */
fe7233c3 1606 draw_view_line(view, view->lineno - view->offset);
fd85fef1 1607
b801d8b2
JF		 1608 redrawwin(view->win);
1609 wrefresh(view->win);
9d3f5834 1610 report("");
b801d8b2
JF		 1611}
1612
b801d8b2 1613
2e8488b4 1614/*
4af34daa
JF		 1615 * Searching
1616 */
1617
c02d8fce 1618static void search_view(struct view *view, enum request request);
4af34daa
JF		 1619
1620static bool
1621find_next_line(struct view *view, unsigned long lineno, struct line *line)
1622{
699ae55b
JF		 1623 assert(view_is_displayed(view));
1624
4af34daa
JF		 1625 if (!view->ops->grep(view, line))
1626 return FALSE;
1627
1628 if (lineno - view->offset >= view->height) {
1629 view->offset = lineno;
1630 view->lineno = lineno;
1631 redraw_view(view);
1632
1633 } else {
1634 unsigned long old_lineno = view->lineno - view->offset;
1635
1636 view->lineno = lineno;
4af34daa
JF		 1637 draw_view_line(view, old_lineno);
1638
1639 draw_view_line(view, view->lineno - view->offset);
1640 redrawwin(view->win);
1641 wrefresh(view->win);
1642 }
1643
1644 report("Line %ld matches '%s'", lineno + 1, view->grep);
1645 return TRUE;
1646}
1647
1648static void
1649find_next(struct view *view, enum request request)
1650{
1651 unsigned long lineno = view->lineno;
1652 int direction;
1653
1654 if (!*view->grep) {
1655 if (!*opt_search)
1656 report("No previous search");
1657 else
c02d8fce 1658 search_view(view, request);
4af34daa
JF		 1659 return;
1660 }
1661
1662 switch (request) {
1663 case REQ_SEARCH:
1664 case REQ_FIND_NEXT:
1665 direction = 1;
1666 break;
1667
1668 case REQ_SEARCH_BACK:
1669 case REQ_FIND_PREV:
1670 direction = -1;
1671 break;
1672
1673 default:
1674 return;
1675 }
1676
1677 if (request == REQ_FIND_NEXT || request == REQ_FIND_PREV)
1678 lineno += direction;
1679
1680 /* Note, lineno is unsigned long so will wrap around in which case it
1681 * will become bigger than view->lines. */
1682 for (; lineno < view->lines; lineno += direction) {
1683 struct line *line = &view->line[lineno];
1684
1685 if (find_next_line(view, lineno, line))
1686 return;
1687 }
1688
1689 report("No match found for '%s'", view->grep);
1690}
1691
1692static void
c02d8fce 1693search_view(struct view *view, enum request request)
4af34daa
JF		 1694{
1695 int regex_err;
1696
b77b2cb8
JF		 1697 if (view->regex) {
1698 regfree(view->regex);
4af34daa 1699 *view->grep = 0;
b77b2cb8
JF		 1700 } else {
1701 view->regex = calloc(1, sizeof(*view->regex));
1702 if (!view->regex)
1703 return;
4af34daa
JF		 1704 }
1705
c02d8fce 1706 regex_err = regcomp(view->regex, opt_search, REG_EXTENDED);
4af34daa
JF		 1707 if (regex_err != 0) {
1708 char buf[SIZEOF_STR] = "unknown error";
1709
b77b2cb8 1710 regerror(regex_err, view->regex, buf, sizeof(buf));
e9cacd58 1711 report("Search failed: %s", buf);
4af34daa
JF		 1712 return;
1713 }
1714
c02d8fce 1715 string_copy(view->grep, opt_search);
4af34daa
JF		 1716
1717 find_next(view, request);
1718}
1719
1720/*
2e8488b4
JF		 1721 * Incremental updating
1722 */
b801d8b2 1723
199d1288
JF		 1724static void
1725end_update(struct view *view)
1726{
1727 if (!view->pipe)
1728 return;
1729 set_nonblocking_input(FALSE);
1730 if (view->pipe == stdin)
1731 fclose(view->pipe);
1732 else
1733 pclose(view->pipe);
1734 view->pipe = NULL;
1735}
1736
03a93dbb 1737static bool
b801d8b2
JF		 1738begin_update(struct view *view)
1739{
4685845e 1740 const char *id = view->id;
fd85fef1 1741
199d1288
JF		 1742 if (view->pipe)
1743 end_update(view);
1744
03a93dbb
JF		 1745 if (opt_cmd[0]) {
1746 string_copy(view->cmd, opt_cmd);
1747 opt_cmd[0] = 0;
8855ada4
JF		 1748 /* When running random commands, the view ref could have become
1749 * invalid so clear it. */
1750 view->ref[0] = 0;
e733ee54
JF		 1751
1752 } else if (view == VIEW(REQ_VIEW_TREE)) {
1753 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1754
1755 if (strcmp(view->vid, view->id))
1756 opt_path[0] = 0;
1757
4ea4ce91 1758 if (!string_format(view->cmd, format, id, opt_path))
e733ee54
JF		 1759 return FALSE;
1760
03a93dbb 1761 } else {
4685845e 1762 const char *format = view->cmd_env ? view->cmd_env : view->cmd_fmt;
1ba2ae4b 1763
cc2d1364 1764 if (!string_format(view->cmd, format, id, id, id, id, id))
03a93dbb
JF		 1765 return FALSE;
1766 }
b801d8b2 1767
6908bdbd
JF		 1768 /* Special case for the pager view. */
1769 if (opt_pipe) {
1770 view->pipe = opt_pipe;
1771 opt_pipe = NULL;
1772 } else {
1773 view->pipe = popen(view->cmd, "r");
1774 }
1775
2e8488b4
JF		 1776 if (!view->pipe)
1777 return FALSE;
b801d8b2 1778
6b161b31 1779 set_nonblocking_input(TRUE);
b801d8b2
JF		 1780
1781 view->offset = 0;
1782 view->lines = 0;
1783 view->lineno = 0;
49f2b43f 1784 string_copy(view->vid, id);
b801d8b2 1785
2e8488b4
JF		 1786 if (view->line) {
1787 int i;
1788
1789 for (i = 0; i < view->lines; i++)
fe7233c3
JF		 1790 if (view->line[i].data)
1791 free(view->line[i].data);
2e8488b4
JF		 1792
1793 free(view->line);
1794 view->line = NULL;
1795 }
1796
1797 view->start_time = time(NULL);
1798
b801d8b2
JF		 1799 return TRUE;
1800}
1801
e2c01617
JF		 1802static struct line *
1803realloc_lines(struct view *view, size_t line_size)
1804{
1805 struct line *tmp = realloc(view->line, sizeof(*view->line) * line_size);
1806
1807 if (!tmp)
1808 return NULL;
1809
1810 view->line = tmp;
1811 view->line_size = line_size;
1812 return view->line;
1813}
1814
03a93dbb 1815static bool
b801d8b2
JF		 1816update_view(struct view *view)
1817{
6b68fd24
JF		 1818 char in_buffer[BUFSIZ];
1819 char out_buffer[BUFSIZ * 2];
b801d8b2 1820 char *line;
82e78006
JF		 1821 /* The number of lines to read. If too low it will cause too much
1822 * redrawing (and possible flickering), if too high responsiveness
1823 * will suffer. */
8855ada4 1824 unsigned long lines = view->height;
82e78006 1825 int redraw_from = -1;
b801d8b2
JF		 1826
1827 if (!view->pipe)
1828 return TRUE;
1829
82e78006
JF		 1830 /* Only redraw if lines are visible. */
1831 if (view->offset + view->height >= view->lines)
1832 redraw_from = view->lines - view->offset;
b801d8b2 1833
699ae55b 1834 /* FIXME: This is probably not perfect for backgrounded views. */
e2c01617 1835 if (!realloc_lines(view, view->lines + lines))
b801d8b2
JF		 1836 goto alloc_error;
1837
6b68fd24
JF		 1838 while ((line = fgets(in_buffer, sizeof(in_buffer), view->pipe))) {
1839 size_t linelen = strlen(line);
b801d8b2 1840
b801d8b2
JF		 1841 if (linelen)
1842 line[linelen - 1] = 0;
1843
6b68fd24
JF		 1844 if (opt_iconv != ICONV_NONE) {
1845 char *inbuf = line;
1846 size_t inlen = linelen;
1847
1848 char *outbuf = out_buffer;
1849 size_t outlen = sizeof(out_buffer);
1850
1851 size_t ret;
1852
1853 ret = iconv(opt_iconv, &inbuf, &inlen, &outbuf, &outlen);
1854 if (ret != (size_t) -1) {
1855 line = out_buffer;
1856 linelen = strlen(out_buffer);
1857 }
1858 }
1859
701e4f5d 1860 if (!view->ops->read(view, line))
b801d8b2 1861 goto alloc_error;
fd85fef1
JF		 1862
1863 if (lines-- == 1)
1864 break;
b801d8b2
JF		 1865 }
1866
8855ada4
JF		 1867 {
1868 int digits;
1869
1870 lines = view->lines;
1871 for (digits = 0; lines; digits++)
1872 lines /= 10;
1873
1874 /* Keep the displayed view in sync with line number scaling. */
1875 if (digits != view->digits) {
1876 view->digits = digits;
1877 redraw_from = 0;
1878 }
1879 }
1880
699ae55b
JF		 1881 if (!view_is_displayed(view))
1882 goto check_pipe;
1883
e733ee54
JF		 1884 if (view == VIEW(REQ_VIEW_TREE)) {
1885 /* Clear the view and redraw everything since the tree sorting
1886 * might have rearranged things. */
1887 redraw_view(view);
1888
1889 } else if (redraw_from >= 0) {
82e78006 1890 /* If this is an incremental update, redraw the previous line
a28bcc22
JF		 1891 * since for commits some members could have changed when
1892 * loading the main view. */
82e78006
JF		 1893 if (redraw_from > 0)
1894 redraw_from--;
1895
1896 /* Incrementally draw avoids flickering. */
1897 redraw_view_from(view, redraw_from);
4c6fabc2 1898 }
b801d8b2 1899
eb98559e
JF		 1900 /* Update the title _after_ the redraw so that if the redraw picks up a
1901 * commit reference in view->ref it'll be available here. */
1902 update_view_title(view);
1903
699ae55b 1904check_pipe:
b801d8b2 1905 if (ferror(view->pipe)) {
03a93dbb 1906 report("Failed to read: %s", strerror(errno));
b801d8b2
JF		 1907 goto end;
1908
1909 } else if (feof(view->pipe)) {
f97f4012 1910 report("");
b801d8b2
JF		 1911 goto end;
1912 }
1913
1914 return TRUE;
1915
1916alloc_error:
2e8488b4 1917 report("Allocation failure");
b801d8b2
JF		 1918
1919end:
1920 end_update(view);
1921 return FALSE;
1922}
1923
79d445ca 1924
e10154d5
JF		 1925/*
1926 * View opening
1927 */
1928
79d445ca
JF		 1929static void open_help_view(struct view *view)
1930{
1931 char buf[BUFSIZ];
1932 int lines = ARRAY_SIZE(req_info) + 2;
1933 int i;
1934
1935 if (view->lines > 0)
1936 return;
1937
1938 for (i = 0; i < ARRAY_SIZE(req_info); i++)
1939 if (!req_info[i].request)
1940 lines++;
1941
1942 view->line = calloc(lines, sizeof(*view->line));
1943 if (!view->line) {
1944 report("Allocation failure");
1945 return;
1946 }
1947
1948 view->ops->read(view, "Quick reference for tig keybindings:");
1949
1950 for (i = 0; i < ARRAY_SIZE(req_info); i++) {
1951 char *key;
1952
1953 if (!req_info[i].request) {
1954 view->ops->read(view, "");
1955 view->ops->read(view, req_info[i].help);
1956 continue;
1957 }
1958
1959 key = get_key(req_info[i].request);
1960 if (!string_format(buf, "%-25s %s", key, req_info[i].help))
1961 continue;
1962
1963 view->ops->read(view, buf);
1964 }
1965}
1966
49f2b43f
JF		 1967enum open_flags {
1968 OPEN_DEFAULT = 0, /* Use default view switching. */
1969 OPEN_SPLIT = 1, /* Split current view. */
1970 OPEN_BACKGROUNDED = 2, /* Backgrounded. */
1971 OPEN_RELOAD = 4, /* Reload view even if it is the current. */
1972};
1973
6b161b31 1974static void
49f2b43f 1975open_view(struct view *prev, enum request request, enum open_flags flags)
b801d8b2 1976{
49f2b43f
JF		 1977 bool backgrounded = !!(flags & OPEN_BACKGROUNDED);
1978 bool split = !!(flags & OPEN_SPLIT);
1979 bool reload = !!(flags & OPEN_RELOAD);
a28bcc22 1980 struct view *view = VIEW(request);
9f41488f 1981 int nviews = displayed_views();
6e950a52 1982 struct view *base_view = display[0];
b801d8b2 1983
49f2b43f 1984 if (view == prev && nviews == 1 && !reload) {
6b161b31
JF		 1985 report("Already in %s view", view->name);
1986 return;
1987 }
b801d8b2 1988
2509b112 1989 if (view == VIEW(REQ_VIEW_HELP)) {
79d445ca 1990 open_help_view(view);
2509b112
JF		 1991
1992 } else if ((reload || strcmp(view->vid, view->id)) &&
1993 !begin_update(view)) {
6b161b31
JF		 1994 report("Failed to load %s view", view->name);
1995 return;
1996 }
a28bcc22 1997
6b161b31 1998 if (split) {
8d741c06 1999 display[1] = view;
6b161b31 2000 if (!backgrounded)
8d741c06 2001 current_view = 1;
6b161b31
JF		 2002 } else {
2003 /* Maximize the current view. */
2004 memset(display, 0, sizeof(display));
2005 current_view = 0;
2006 display[current_view] = view;
a28bcc22 2007 }
b801d8b2 2008
6e950a52
JF		 2009 /* Resize the view when switching between split- and full-screen,
2010 * or when switching between two different full-screen views. */
2011 if (nviews != displayed_views() ||
2012 (nviews == 1 && base_view != display[0]))
a006db63 2013 resize_display();
b801d8b2 2014
a8891802 2015 if (split && prev->lineno - prev->offset >= prev->height) {
03a93dbb 2016 /* Take the title line into account. */
eb98559e 2017 int lines = prev->lineno - prev->offset - prev->height + 1;
03a93dbb
JF		 2018
2019 /* Scroll the view that was split if the current line is
2020 * outside the new limited view. */
8c317212 2021 do_scroll_view(prev, lines);
03a93dbb
JF		 2022 }
2023
6b161b31 2024 if (prev && view != prev) {
9b995f0c 2025 if (split && !backgrounded) {
f0b3ab80
JF		 2026 /* "Blur" the previous view. */
2027 update_view_title(prev);
9f396969 2028 }
f0b3ab80 2029
f6da0b66 2030 view->parent = prev;
b801d8b2
JF		 2031 }
2032
9f396969 2033 if (view->pipe && view->lines == 0) {
03a93dbb
JF		 2034 /* Clear the old view and let the incremental updating refill
2035 * the screen. */
2036 wclear(view->win);
f97f4012 2037 report("");
03a93dbb
JF		 2038 } else {
2039 redraw_view(view);
24b5b3e0 2040 report("");
03a93dbb 2041 }
6706b2ba
JF		 2042
2043 /* If the view is backgrounded the above calls to report()
2044 * won't redraw the view title. */
2045 if (backgrounded)
2046 update_view_title(view);
b801d8b2
JF		 2047}
2048
2049
6b161b31
JF		 2050/*
2051 * User request switch noodle
2052 */
2053
b801d8b2 2054static int
6b161b31 2055view_driver(struct view *view, enum request request)
b801d8b2 2056{
b801d8b2
JF		 2057 int i;
2058
2059 switch (request) {
4a2909a7
JF		 2060 case REQ_MOVE_UP:
2061 case REQ_MOVE_DOWN:
2062 case REQ_MOVE_PAGE_UP:
2063 case REQ_MOVE_PAGE_DOWN:
2064 case REQ_MOVE_FIRST_LINE:
2065 case REQ_MOVE_LAST_LINE:
8522ecc7 2066 move_view(view, request);
fd85fef1
JF		 2067 break;
2068
4a2909a7
JF		 2069 case REQ_SCROLL_LINE_DOWN:
2070 case REQ_SCROLL_LINE_UP:
2071 case REQ_SCROLL_PAGE_DOWN:
2072 case REQ_SCROLL_PAGE_UP:
a28bcc22 2073 scroll_view(view, request);
b801d8b2
JF		 2074 break;
2075
e733ee54
JF		 2076 case REQ_VIEW_BLOB:
2077 if (!ref_blob[0]) {
2078 report("No file chosen, press 't' to open tree view");
2079 break;
2080 }
2081 /* Fall-through */
4a2909a7 2082 case REQ_VIEW_MAIN:
4a2909a7 2083 case REQ_VIEW_DIFF:
2e8488b4 2084 case REQ_VIEW_LOG:
e733ee54 2085 case REQ_VIEW_TREE:
2e8488b4 2086 case REQ_VIEW_HELP:
6908bdbd 2087 case REQ_VIEW_PAGER:
49f2b43f 2088 open_view(view, request, OPEN_DEFAULT);
b801d8b2
JF		 2089 break;
2090
b3a54cba
JF		 2091 case REQ_NEXT:
2092 case REQ_PREVIOUS:
2093 request = request == REQ_NEXT ? REQ_MOVE_DOWN : REQ_MOVE_UP;
2094
e733ee54
JF		 2095 if ((view == VIEW(REQ_VIEW_DIFF) &&
2096 view->parent == VIEW(REQ_VIEW_MAIN)) ||
2097 (view == VIEW(REQ_VIEW_BLOB) &&
2098 view->parent == VIEW(REQ_VIEW_TREE))) {
b3a54cba 2099 view = view->parent;
8522ecc7
JF		 2100 move_view(view, request);
2101 if (view_is_displayed(view))
f0b3ab80 2102 update_view_title(view);
b3a54cba 2103 } else {
8522ecc7 2104 move_view(view, request);
b3a54cba
JF		 2105 break;
2106 }
6706b2ba
JF		 2107 /* Fall-through */
2108
6b161b31 2109 case REQ_ENTER:
6908bdbd
JF		 2110 if (!view->lines) {
2111 report("Nothing to enter");
2112 break;
2113 }
fe7233c3 2114 return view->ops->enter(view, &view->line[view->lineno]);
6b161b31 2115
03a93dbb
JF		 2116 case REQ_VIEW_NEXT:
2117 {
9f41488f 2118 int nviews = displayed_views();
03a93dbb
JF		 2119 int next_view = (current_view + 1) % nviews;
2120
2121 if (next_view == current_view) {
2122 report("Only one view is displayed");
2123 break;
2124 }
2125
2126 current_view = next_view;
2127 /* Blur out the title of the previous view. */
2128 update_view_title(view);
6734f6b9 2129 report("");
03a93dbb
JF		 2130 break;
2131 }
24b5b3e0 2132 case REQ_TOGGLE_LINENO:
b76c2afc 2133 opt_line_number = !opt_line_number;
20bb5e18 2134 redraw_display();
b801d8b2
JF		 2135 break;
2136
54efb62b
JF		 2137 case REQ_TOGGLE_REV_GRAPH:
2138 opt_rev_graph = !opt_rev_graph;
2139 redraw_display();
2140 break;
2141
03a93dbb 2142 case REQ_PROMPT:
8855ada4 2143 /* Always reload^Wrerun commands from the prompt. */
49f2b43f 2144 open_view(view, opt_request, OPEN_RELOAD);
03a93dbb
JF		 2145 break;
2146
4af34daa
JF		 2147 case REQ_SEARCH:
2148 case REQ_SEARCH_BACK:
c02d8fce 2149 search_view(view, request);
4af34daa
JF		 2150 break;
2151
2152 case REQ_FIND_NEXT:
2153 case REQ_FIND_PREV:
2154 find_next(view, request);
2155 break;
2156
4a2909a7 2157 case REQ_STOP_LOADING:
59a45d3a
JF		 2158 for (i = 0; i < ARRAY_SIZE(views); i++) {
2159 view = &views[i];
2e8488b4 2160 if (view->pipe)
6a7bb912 2161 report("Stopped loading the %s view", view->name),
03a93dbb
JF		 2162 end_update(view);
2163 }
b801d8b2
JF		 2164 break;
2165
4a2909a7 2166 case REQ_SHOW_VERSION:
6cb291b7 2167 report("%s (built %s)", VERSION, __DATE__);
b801d8b2
JF		 2168 return TRUE;
2169
fac7db6c
JF		 2170 case REQ_SCREEN_RESIZE:
2171 resize_display();
2172 /* Fall-through */
4a2909a7 2173 case REQ_SCREEN_REDRAW:
20bb5e18 2174 redraw_display();
4a2909a7
JF		 2175 break;
2176
1d754561 2177 case REQ_NONE:
b801d8b2
JF		 2178 doupdate();
2179 return TRUE;
2180
4f9b667a 2181 case REQ_VIEW_CLOSE:
2fcf5401
JF		 2182 /* XXX: Mark closed views by letting view->parent point to the
2183 * view itself. Parents to closed view should never be
2184 * followed. */
2185 if (view->parent &&
2186 view->parent->parent != view->parent) {
4f9b667a
JF		 2187 memset(display, 0, sizeof(display));
2188 current_view = 0;
f6da0b66 2189 display[current_view] = view->parent;
2fcf5401 2190 view->parent = view;
4f9b667a
JF		 2191 resize_display();
2192 redraw_display();
2193 break;
2194 }
2195 /* Fall-through */
b801d8b2
JF		 2196 case REQ_QUIT:
2197 return FALSE;
2198
2199 default:
2e8488b4 2200 /* An unknown key will show most commonly used commands. */
468876c9 2201 report("Unknown key, press 'h' for help");
b801d8b2
JF		 2202 return TRUE;
2203 }
2204
2205 return TRUE;
2206}
2207
2208
2209/*
ff26aa29 2210 * Pager backend
b801d8b2
JF		 2211 */
2212
6b161b31 2213static bool
5dcf8064 2214pager_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
b801d8b2 2215{
fe7233c3
JF		 2216 char *text = line->data;
2217 enum line_type type = line->type;
2218 int textlen = strlen(text);
78c70acd 2219 int attr;
b801d8b2 2220
6706b2ba
JF		 2221 wmove(view->win, lineno, 0);
2222
5dcf8064 2223 if (selected) {
78c70acd 2224 type = LINE_CURSOR;
6706b2ba 2225 wchgat(view->win, -1, 0, type, NULL);
fd85fef1
JF		 2226 }
2227
78c70acd 2228 attr = get_line_attr(type);
b801d8b2 2229 wattrset(view->win, attr);
b76c2afc 2230
6706b2ba
JF		 2231 if (opt_line_number || opt_tab_size < TABSIZE) {
2232 static char spaces[] = " ";
2233 int col_offset = 0, col = 0;
2234
2235 if (opt_line_number) {
2236 unsigned long real_lineno = view->offset + lineno + 1;
82e78006 2237
6706b2ba
JF		 2238 if (real_lineno == 1 ||
2239 (real_lineno % opt_num_interval) == 0) {
2240 wprintw(view->win, "%.*d", view->digits, real_lineno);
8855ada4 2241
6706b2ba
JF		 2242 } else {
2243 waddnstr(view->win, spaces,
2244 MIN(view->digits, STRING_SIZE(spaces)));
2245 }
2246 waddstr(view->win, ": ");
2247 col_offset = view->digits + 2;
2248 }
8855ada4 2249
fe7233c3 2250 while (text && col_offset + col < view->width) {
6706b2ba 2251 int cols_max = view->width - col_offset - col;
fe7233c3 2252 char *pos = text;
6706b2ba 2253 int cols;
4c6fabc2 2254
fe7233c3
JF		 2255 if (*text == '\t') {
2256 text++;
6706b2ba 2257 assert(sizeof(spaces) > TABSIZE);
fe7233c3 2258 pos = spaces;
6706b2ba 2259 cols = opt_tab_size - (col % opt_tab_size);
82e78006 2260
b76c2afc 2261 } else {
fe7233c3
JF		 2262 text = strchr(text, '\t');
2263 cols = line ? text - pos : strlen(pos);
b76c2afc 2264 }
6706b2ba 2265
fe7233c3 2266 waddnstr(view->win, pos, MIN(cols, cols_max));
6706b2ba 2267 col += cols;
b76c2afc 2268 }
b76c2afc
JF		 2269
2270 } else {
6706b2ba 2271 int col = 0, pos = 0;
b801d8b2 2272
fe7233c3
JF		 2273 for (; pos < textlen && col < view->width; pos++, col++)
2274 if (text[pos] == '\t')
6706b2ba
JF		 2275 col += TABSIZE - (col % TABSIZE) - 1;
2276
fe7233c3 2277 waddnstr(view->win, text, pos);
6706b2ba 2278 }
2e8488b4 2279
b801d8b2
JF		 2280 return TRUE;
2281}
2282
dc23c0e3 2283static bool
d65ced0d 2284add_describe_ref(char *buf, size_t *bufpos, char *commit_id, const char *sep)
dc23c0e3 2285{
17482b11 2286 char refbuf[SIZEOF_STR];
dc23c0e3
JF		 2287 char *ref = NULL;
2288 FILE *pipe;
2289
2290 if (!string_format(refbuf, "git describe %s", commit_id))
2291 return TRUE;
2292
2293 pipe = popen(refbuf, "r");
2294 if (!pipe)
2295 return TRUE;
2296
2297 if ((ref = fgets(refbuf, sizeof(refbuf), pipe)))
2298 ref = chomp_string(ref);
2299 pclose(pipe);
2300
2301 if (!ref || !*ref)
2302 return TRUE;
2303
2304 /* This is the only fatal call, since it can "corrupt" the buffer. */
17482b11 2305 if (!string_nformat(buf, SIZEOF_STR, bufpos, "%s%s", sep, ref))
dc23c0e3
JF		 2306 return FALSE;
2307
2308 return TRUE;
2309}
2310
7b99a34c
JF		 2311static void
2312add_pager_refs(struct view *view, struct line *line)
2313{
17482b11 2314 char buf[SIZEOF_STR];
c9ca1ec3 2315 char *commit_id = line->data + STRING_SIZE("commit ");
7b99a34c 2316 struct ref **refs;
d65ced0d 2317 size_t bufpos = 0, refpos = 0;
7b99a34c 2318 const char *sep = "Refs: ";
dc23c0e3 2319 bool is_tag = FALSE;
7b99a34c
JF		 2320
2321 assert(line->type == LINE_COMMIT);
2322
c9ca1ec3 2323 refs = get_refs(commit_id);
dc23c0e3
JF		 2324 if (!refs) {
2325 if (view == VIEW(REQ_VIEW_DIFF))
2326 goto try_add_describe_ref;
7b99a34c 2327 return;
dc23c0e3 2328 }
7b99a34c
JF		 2329
2330 do {
cc2d1364
JF		 2331 struct ref *ref = refs[refpos];
2332 char *fmt = ref->tag ? "%s[%s]" : "%s%s";
7b99a34c 2333
cc2d1364
JF		 2334 if (!string_format_from(buf, &bufpos, fmt, sep, ref->name))
2335 return;
7b99a34c 2336 sep = ", ";
dc23c0e3
JF		 2337 if (ref->tag)
2338 is_tag = TRUE;
7b99a34c
JF		 2339 } while (refs[refpos++]->next);
2340
dc23c0e3
JF		 2341 if (!is_tag && view == VIEW(REQ_VIEW_DIFF)) {
2342try_add_describe_ref:
d42c8a35 2343 /* Add <tag>-g<commit_id> "fake" reference. */
dc23c0e3
JF		 2344 if (!add_describe_ref(buf, &bufpos, commit_id, sep))
2345 return;
2346 }
2347
d42c8a35
JF		 2348 if (bufpos == 0)
2349 return;
2350
cc2d1364 2351 if (!realloc_lines(view, view->line_size + 1))
7b99a34c
JF		 2352 return;
2353
2354 line = &view->line[view->lines];
2355 line->data = strdup(buf);
2356 if (!line->data)
2357 return;
2358
2359 line->type = LINE_PP_REFS;
2360 view->lines++;
2361}
2362
6b161b31 2363static bool
701e4f5d 2364pager_read(struct view *view, char *data)
22f66b0a 2365{
7b99a34c 2366 struct line *line = &view->line[view->lines];
22f66b0a 2367
7b99a34c
JF		 2368 line->data = strdup(data);
2369 if (!line->data)
2370 return FALSE;
fe7233c3 2371
7b99a34c 2372 line->type = get_line_type(line->data);
22f66b0a 2373 view->lines++;
7b99a34c
JF		 2374
2375 if (line->type == LINE_COMMIT &&
2376 (view == VIEW(REQ_VIEW_DIFF) ||
2377 view == VIEW(REQ_VIEW_LOG)))
2378 add_pager_refs(view, line);
2379
22f66b0a
JF		 2380 return TRUE;
2381}
2382
6b161b31 2383static bool
fe7233c3 2384pager_enter(struct view *view, struct line *line)
6b161b31 2385{
91e8e277 2386 int split = 0;
6b161b31 2387
9fbbd28f
JF		 2388 if (line->type == LINE_COMMIT &&
2389 (view == VIEW(REQ_VIEW_LOG) ||
2390 view == VIEW(REQ_VIEW_PAGER))) {
91e8e277
JF		 2391 open_view(view, REQ_VIEW_DIFF, OPEN_SPLIT);
2392 split = 1;
67e48ac5
JF		 2393 }
2394
91e8e277
JF		 2395 /* Always scroll the view even if it was split. That way
2396 * you can use Enter to scroll through the log view and
2397 * split open each commit diff. */
2398 scroll_view(view, REQ_SCROLL_LINE_DOWN);
2399
2400 /* FIXME: A minor workaround. Scrolling the view will call report("")
9d82d824
JF		 2401 * but if we are scrolling a non-current view this won't properly
2402 * update the view title. */
91e8e277
JF		 2403 if (split)
2404 update_view_title(view);
6b161b31
JF		 2405
2406 return TRUE;
2407}
2408
4af34daa
JF		 2409static bool
2410pager_grep(struct view *view, struct line *line)
2411{
2412 regmatch_t pmatch;
2413 char *text = line->data;
2414
2415 if (!*text)
2416 return FALSE;
2417
b77b2cb8 2418 if (regexec(view->regex, text, 1, &pmatch, 0) == REG_NOMATCH)
4af34daa
JF		 2419 return FALSE;
2420
2421 return TRUE;
2422}
2423
d720de4b
JF		 2424static void
2425pager_select(struct view *view, struct line *line)
2426{
2427 if (line->type == LINE_COMMIT) {
2428 char *text = line->data;
2429
5dcf8064 2430 string_copy(view->ref, text + STRING_SIZE("commit "));
d720de4b
JF		 2431 string_copy(ref_commit, view->ref);
2432 }
2433}
2434
6b161b31 2435static struct view_ops pager_ops = {
6734f6b9 2436 "line",
6b161b31
JF		 2437 pager_draw,
2438 pager_read,
2439 pager_enter,
4af34daa 2440 pager_grep,
d720de4b 2441 pager_select,
6b161b31
JF		 2442};
2443
80ce96ea 2444
ff26aa29 2445/*
e733ee54
JF		 2446 * Tree backend
2447 */
2448
2449/* Parse output from git ls-tree:
2450 *
2451 * 100644 blob fb0e31ea6cc679b7379631188190e975f5789c26 Makefile
2452 * 100644 blob 5304ca4260aaddaee6498f9630e7d471b8591ea6 README
2453 * 100644 blob f931e1d229c3e185caad4449bf5b66ed72462657 tig.c
2454 * 100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38 web.conf
2455 */
2456
2457#define SIZEOF_TREE_ATTR \
2458 STRING_SIZE("100644 blob ed09fe897f3c7c9af90bcf80cae92558ea88ae38\t")
2459
2460#define TREE_UP_FORMAT "040000 tree %s\t.."
2461
2462static int
2463tree_compare_entry(enum line_type type1, char *name1,
2464 enum line_type type2, char *name2)
2465{
2466 if (type1 != type2) {
2467 if (type1 == LINE_TREE_DIR)
2468 return -1;
2469 return 1;
2470 }
2471
2472 return strcmp(name1, name2);
2473}
2474
2475static bool
2476tree_read(struct view *view, char *text)
2477{
2478 size_t textlen = strlen(text);
2479 char buf[SIZEOF_STR];
2480 unsigned long pos;
2481 enum line_type type;
f88a5319 2482 bool first_read = view->lines == 0;
e733ee54
JF		 2483
2484 if (textlen <= SIZEOF_TREE_ATTR)
2485 return FALSE;
2486
2487 type = text[STRING_SIZE("100644 ")] == 't'
2488 ? LINE_TREE_DIR : LINE_TREE_FILE;
2489
f88a5319 2490 if (first_read) {
e733ee54 2491 /* Add path info line */
4ea4ce91 2492 if (string_format(buf, "Directory path /%s", opt_path) &&
e733ee54
JF		 2493 realloc_lines(view, view->line_size + 1) &&
2494 pager_read(view, buf))
2495 view->line[view->lines - 1].type = LINE_DEFAULT;
2496 else
2497 return FALSE;
2498
2499 /* Insert "link" to parent directory. */
2500 if (*opt_path &&
4ea4ce91 2501 string_format(buf, TREE_UP_FORMAT, view->ref) &&
e733ee54
JF		 2502 realloc_lines(view, view->line_size + 1) &&
2503 pager_read(view, buf))
2504 view->line[view->lines - 1].type = LINE_TREE_DIR;
2505 else if (*opt_path)
2506 return FALSE;
2507 }
2508
2509 /* Strip the path part ... */
2510 if (*opt_path) {
2511 size_t pathlen = textlen - SIZEOF_TREE_ATTR;
2512 size_t striplen = strlen(opt_path);
2513 char *path = text + SIZEOF_TREE_ATTR;
2514
2515 if (pathlen > striplen)
2516 memmove(path, path + striplen,
2517 pathlen - striplen + 1);
2518 }
2519
2520 /* Skip "Directory ..." and ".." line. */
2521 for (pos = 1 + !!*opt_path; pos < view->lines; pos++) {
2522 struct line *line = &view->line[pos];
2523 char *path1 = ((char *) line->data) + SIZEOF_TREE_ATTR;
2524 char *path2 = text + SIZEOF_TREE_ATTR;
2525 int cmp = tree_compare_entry(line->type, path1, type, path2);
2526
2527 if (cmp <= 0)
2528 continue;
2529
2530 text = strdup(text);
2531 if (!text)
2532 return FALSE;
2533
2534 if (view->lines > pos)
2535 memmove(&view->line[pos + 1], &view->line[pos],
2536 (view->lines - pos) * sizeof(*line));
2537
2538 line = &view->line[pos];
2539 line->data = text;
2540 line->type = type;
2541 view->lines++;
2542 return TRUE;
2543 }
2544
2545 if (!pager_read(view, text))
2546 return FALSE;
2547
f88a5319
JF		 2548 /* Move the current line to the first tree entry. */
2549 if (first_read)
2550 view->lineno++;
2551
e733ee54
JF		 2552 view->line[view->lines - 1].type = type;
2553 return TRUE;
2554}
2555
2556static bool
2557tree_enter(struct view *view, struct line *line)
2558{
2b42e5d6 2559 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
e733ee54
JF		 2560 char *data = line->data;
2561 enum request request;
2562
2563 switch (line->type) {
2564 case LINE_TREE_DIR:
2565 /* Depending on whether it is a subdir or parent (updir?) link
2566 * mangle the path buffer. */
2567 if (line == &view->line[1] && *opt_path) {
2568 size_t path_len = strlen(opt_path);
2569 char *dirsep = opt_path + path_len - 1;
2570
2571 while (dirsep > opt_path && dirsep[-1] != '/')
2572 dirsep--;
2573
2574 dirsep[0] = 0;
2575
2576 } else {
d65ced0d 2577 size_t pathlen = strlen(opt_path);
4ea4ce91 2578 size_t origlen = pathlen;
e733ee54
JF		 2579 char *basename = data + SIZEOF_TREE_ATTR;
2580
4038038f 2581 if (!string_format_from(opt_path, &pathlen, "%s/", basename)) {
4ea4ce91
JF		 2582 opt_path[origlen] = 0;
2583 return TRUE;
2584 }
e733ee54
JF		 2585 }
2586
2587 /* Trees and subtrees share the same ID, so they are not not
2588 * unique like blobs. */
2589 flags |= OPEN_RELOAD;
2590 request = REQ_VIEW_TREE;
2591 break;
2592
2593 case LINE_TREE_FILE:
e733ee54
JF		 2594 request = REQ_VIEW_BLOB;
2595 break;
2596
2597 default:
2598 return TRUE;
2599 }
2600
2601 open_view(view, request, flags);
2602
2603 if (!VIEW(request)->pipe)
2604 return TRUE;
2605
2606 /* For tree views insert the path to the parent as the first line. */
2607 if (request == REQ_VIEW_BLOB) {
2608 /* Mirror what is showed in the title bar. */
2609 string_ncopy(ref_blob, data + STRING_SIZE("100644 blob "), 40);
2610 string_copy(VIEW(REQ_VIEW_BLOB)->ref, ref_blob);
2611 return TRUE;
2612 }
2613
2614 return TRUE;
2615}
2616
d720de4b
JF		 2617static void
2618tree_select(struct view *view, struct line *line)
2619{
2620 if (line->type == LINE_TREE_DIR || line->type == LINE_TREE_FILE) {
2621 char *text = line->data;
2622
2623 string_ncopy(view->ref, text + STRING_SIZE("100644 blob "), 40);
2624 string_copy(ref_blob, view->ref);
2625 }
2626}
2627
e733ee54
JF		 2628static struct view_ops tree_ops = {
2629 "file",
2630 pager_draw,
2631 tree_read,
2632 tree_enter,
2633 pager_grep,
d720de4b 2634 tree_select,
e733ee54
JF		 2635};
2636
2637static bool
2638blob_read(struct view *view, char *line)
2639{
2640 bool state = pager_read(view, line);
2641
2642 if (state == TRUE)
2643 view->line[view->lines - 1].type = LINE_DEFAULT;
2644
2645 return state;
2646}
2647
2648static struct view_ops blob_ops = {
2649 "line",
2650 pager_draw,
2651 blob_read,
2652 pager_enter,
2653 pager_grep,
d720de4b 2654 pager_select,
e733ee54
JF		 2655};
2656
2657
2658/*
ff26aa29
JF		 2659 * Main view backend
2660 */
2661
2662struct commit {
54efb62b
JF		 2663 char id[41]; /* SHA1 ID. */
2664 char title[75]; /* First line of the commit message. */
2665 char author[75]; /* Author of the commit. */
2666 struct tm time; /* Date from the author ident. */
2667 struct ref **refs; /* Repository references. */
2668 chtype graph[SIZEOF_REVGRAPH]; /* Ancestry chain graphics. */
2669 size_t graph_size; /* The width of the graph array. */
ff26aa29 2670};
c34d9c9f 2671
6b161b31 2672static bool
5dcf8064 2673main_draw(struct view *view, struct line *line, unsigned int lineno, bool selected)
22f66b0a 2674{
2e8488b4 2675 char buf[DATE_COLS + 1];
fe7233c3 2676 struct commit *commit = line->data;
78c70acd 2677 enum line_type type;
6706b2ba 2678 int col = 0;
b76c2afc 2679 size_t timelen;
10e290ee 2680 size_t authorlen;
9989bf60 2681 int trimmed = 1;
22f66b0a 2682
4c6fabc2
JF		 2683 if (!*commit->author)
2684 return FALSE;
22f66b0a 2685
6706b2ba
JF		 2686 wmove(view->win, lineno, col);
2687
5dcf8064 2688 if (selected) {
78c70acd 2689 type = LINE_CURSOR;
6706b2ba
JF		 2690 wattrset(view->win, get_line_attr(type));
2691 wchgat(view->win, -1, 0, type, NULL);
2692
78c70acd 2693 } else {
b76c2afc 2694 type = LINE_MAIN_COMMIT;
6706b2ba 2695 wattrset(view->win, get_line_attr(LINE_MAIN_DATE));
b76c2afc
JF		 2696 }
2697
4c6fabc2 2698 timelen = strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time);
b76c2afc 2699 waddnstr(view->win, buf, timelen);
4c6fabc2 2700 waddstr(view->win, " ");
b76c2afc 2701
6706b2ba
JF		 2702 col += DATE_COLS;
2703 wmove(view->win, lineno, col);
2704 if (type != LINE_CURSOR)
2705 wattrset(view->win, get_line_attr(LINE_MAIN_AUTHOR));
b76c2afc 2706
9989bf60
JF		 2707 if (opt_utf8) {
2708 authorlen = utf8_length(commit->author, AUTHOR_COLS - 2, &col, &trimmed);
2709 } else {
2710 authorlen = strlen(commit->author);
2711 if (authorlen > AUTHOR_COLS - 2) {
2712 authorlen = AUTHOR_COLS - 2;
2713 trimmed = 1;
2714 }
2715 }
10e290ee
JF		 2716
2717 if (trimmed) {
2718 waddnstr(view->win, commit->author, authorlen);
6706b2ba
JF		 2719 if (type != LINE_CURSOR)
2720 wattrset(view->win, get_line_attr(LINE_MAIN_DELIM));
b76c2afc
JF		 2721 waddch(view->win, '~');
2722 } else {
2723 waddstr(view->win, commit->author);
22f66b0a
JF		 2724 }
2725
10e290ee 2726 col += AUTHOR_COLS;
6706b2ba
JF		 2727 if (type != LINE_CURSOR)
2728 wattrset(view->win, A_NORMAL);
2729
54efb62b
JF		 2730 if (opt_rev_graph && commit->graph_size) {
2731 size_t i;
2732
2733 wmove(view->win, lineno, col);
2734 /* Using waddch() instead of waddnstr() ensures that
2735 * they'll be rendered correctly for the cursor line. */
2736 for (i = 0; i < commit->graph_size; i++)
2737 waddch(view->win, commit->graph[i]);
2738
2739 col += commit->graph_size + 1;
2740 }
2741
2742 wmove(view->win, lineno, col);
c34d9c9f
JF		 2743
2744 if (commit->refs) {
2745 size_t i = 0;
2746
2747 do {
6706b2ba
JF		 2748 if (type == LINE_CURSOR)
2749 ;
2750 else if (commit->refs[i]->tag)
c34d9c9f
JF		 2751 wattrset(view->win, get_line_attr(LINE_MAIN_TAG));
2752 else
2753 wattrset(view->win, get_line_attr(LINE_MAIN_REF));
2754 waddstr(view->win, "[");
2755 waddstr(view->win, commit->refs[i]->name);
2756 waddstr(view->win, "]");
6706b2ba
JF		 2757 if (type != LINE_CURSOR)
2758 wattrset(view->win, A_NORMAL);
c34d9c9f 2759 waddstr(view->win, " ");
6706b2ba 2760 col += strlen(commit->refs[i]->name) + STRING_SIZE("[] ");
c34d9c9f
JF		 2761 } while (commit->refs[i++]->next);
2762 }
2763
6706b2ba
JF		 2764 if (type != LINE_CURSOR)
2765 wattrset(view->win, get_line_attr(type));
2766
2767 {
2768 int titlelen = strlen(commit->title);
2769
2770 if (col + titlelen > view->width)
2771 titlelen = view->width - col;
2772
2773 waddnstr(view->win, commit->title, titlelen);
2774 }
22f66b0a
JF		 2775
2776 return TRUE;
2777}
2778
4c6fabc2 2779/* Reads git log --pretty=raw output and parses it into the commit struct. */
6b161b31 2780static bool
701e4f5d 2781main_read(struct view *view, char *line)
22f66b0a 2782{
78c70acd 2783 enum line_type type = get_line_type(line);
701e4f5d
JF		 2784 struct commit *commit = view->lines
2785 ? view->line[view->lines - 1].data : NULL;
22f66b0a 2786
78c70acd
JF		 2787 switch (type) {
2788 case LINE_COMMIT:
22f66b0a
JF		 2789 commit = calloc(1, sizeof(struct commit));
2790 if (!commit)
2791 return FALSE;
2792
4c6fabc2 2793 line += STRING_SIZE("commit ");
b76c2afc 2794
fe7233c3 2795 view->line[view->lines++].data = commit;
82e78006 2796 string_copy(commit->id, line);
c34d9c9f 2797 commit->refs = get_refs(commit->id);
54efb62b 2798 commit->graph[commit->graph_size++] = ACS_LTEE;
78c70acd 2799 break;
22f66b0a 2800
8855ada4 2801 case LINE_AUTHOR:
b76c2afc 2802 {
4c6fabc2 2803 char *ident = line + STRING_SIZE("author ");
b76c2afc
JF		 2804 char *end = strchr(ident, '<');
2805
701e4f5d 2806 if (!commit)
fe7233c3
JF		 2807 break;
2808
b76c2afc 2809 if (end) {
cbbf2d1b
JF		 2810 char *email = end + 1;
2811
b76c2afc 2812 for (; end > ident && isspace(end[-1]); end--) ;
cbbf2d1b
JF		 2813
2814 if (end == ident && *email) {
2815 ident = email;
2816 end = strchr(ident, '>');
2817 for (; end > ident && isspace(end[-1]); end--) ;
2818 }
b76c2afc
JF		 2819 *end = 0;
2820 }
2821
cbbf2d1b
JF		 2822 /* End is NULL or ident meaning there's no author. */
2823 if (end <= ident)
2824 ident = "Unknown";
2825
82e78006 2826 string_copy(commit->author, ident);
b76c2afc 2827
4c6fabc2 2828 /* Parse epoch and timezone */
b76c2afc
JF		 2829 if (end) {
2830 char *secs = strchr(end + 1, '>');
2831 char *zone;
2832 time_t time;
2833
2834 if (!secs || secs[1] != ' ')
2835 break;
2836
2837 secs += 2;
2838 time = (time_t) atol(secs);
2839 zone = strchr(secs, ' ');
4c6fabc2 2840 if (zone && strlen(zone) == STRING_SIZE(" +0700")) {
b76c2afc
JF		 2841 long tz;
2842
2843 zone++;
2844 tz = ('0' - zone[1]) * 60 * 60 * 10;
2845 tz += ('0' - zone[2]) * 60 * 60;
2846 tz += ('0' - zone[3]) * 60;
2847 tz += ('0' - zone[4]) * 60;
2848
2849 if (zone[0] == '-')
2850 tz = -tz;
2851
2852 time -= tz;
2853 }
2854 gmtime_r(&time, &commit->time);
2855 }
2856 break;
2857 }
78c70acd 2858 default:
701e4f5d 2859 if (!commit)
2e8488b4
JF		 2860 break;
2861
2862 /* Fill in the commit title if it has not already been set. */
2e8488b4
JF		 2863 if (commit->title[0])
2864 break;
2865
2866 /* Require titles to start with a non-space character at the
2867 * offset used by git log. */
eb98559e
JF		 2868 /* FIXME: More gracefull handling of titles; append "..." to
2869 * shortened titles, etc. */
2e8488b4 2870 if (strncmp(line, " ", 4) ||
eb98559e 2871 isspace(line[4]))
82e78006
JF		 2872 break;
2873
2874 string_copy(commit->title, line + 4);
22f66b0a
JF		 2875 }
2876
2877 return TRUE;
2878}
2879
6b161b31 2880static bool
fe7233c3 2881main_enter(struct view *view, struct line *line)
b801d8b2 2882{
b3a54cba
JF		 2883 enum open_flags flags = display[0] == view ? OPEN_SPLIT : OPEN_DEFAULT;
2884
2885 open_view(view, REQ_VIEW_DIFF, flags);
6b161b31 2886 return TRUE;
b801d8b2
JF		 2887}
2888
4af34daa
JF		 2889static bool
2890main_grep(struct view *view, struct line *line)
2891{
2892 struct commit *commit = line->data;
2893 enum { S_TITLE, S_AUTHOR, S_DATE, S_END } state;
2894 char buf[DATE_COLS + 1];
2895 regmatch_t pmatch;
2896
2897 for (state = S_TITLE; state < S_END; state++) {
2898 char *text;
2899
2900 switch (state) {
2901 case S_TITLE: text = commit->title; break;
2902 case S_AUTHOR: text = commit->author; break;
2903 case S_DATE:
2904 if (!strftime(buf, sizeof(buf), DATE_FORMAT, &commit->time))
2905 continue;
2906 text = buf;
2907 break;
2908
2909 default:
2910 return FALSE;
2911 }
2912
b77b2cb8 2913 if (regexec(view->regex, text, 1, &pmatch, 0) != REG_NOMATCH)
4af34daa
JF		 2914 return TRUE;
2915 }
2916
2917 return FALSE;
2918}
2919
d720de4b
JF		 2920static void
2921main_select(struct view *view, struct line *line)
2922{
2923 struct commit *commit = line->data;
2924
2925 string_copy(view->ref, commit->id);
2926 string_copy(ref_commit, view->ref);
2927}
2928
6b161b31 2929static struct view_ops main_ops = {
6734f6b9 2930 "commit",
6b161b31
JF		 2931 main_draw,
2932 main_read,
2933 main_enter,
4af34daa 2934 main_grep,
d720de4b 2935 main_select,
6b161b31 2936};
2e8488b4 2937
c34d9c9f 2938
6b161b31 2939/*
10e290ee
JF		 2940 * Unicode / UTF-8 handling
2941 *
2942 * NOTE: Much of the following code for dealing with unicode is derived from
2943 * ELinks' UTF-8 code developed by Scrool <scroolik@gmail.com>. Origin file is
2944 * src/intl/charset.c from the utf8 branch commit elinks-0.11.0-g31f2c28.
2945 */
2946
2947/* I've (over)annotated a lot of code snippets because I am not entirely
2948 * confident that the approach taken by this small UTF-8 interface is correct.
2949 * --jonas */
2950
2951static inline int
2952unicode_width(unsigned long c)
2953{
2954 if (c >= 0x1100 &&
2955 (c <= 0x115f /* Hangul Jamo */
2956 || c == 0x2329
2957 || c == 0x232a
2958 || (c >= 0x2e80 && c <= 0xa4cf && c != 0x303f)
f97f4012 2959 /* CJK ... Yi */
10e290ee
JF		 2960 || (c >= 0xac00 && c <= 0xd7a3) /* Hangul Syllables */
2961 || (c >= 0xf900 && c <= 0xfaff) /* CJK Compatibility Ideographs */
2962 || (c >= 0xfe30 && c <= 0xfe6f) /* CJK Compatibility Forms */
2963 || (c >= 0xff00 && c <= 0xff60) /* Fullwidth Forms */
2964 || (c >= 0xffe0 && c <= 0xffe6)
2965 || (c >= 0x20000 && c <= 0x2fffd)
2966 || (c >= 0x30000 && c <= 0x3fffd)))
2967 return 2;
2968
2969 return 1;
2970}
2971
2972/* Number of bytes used for encoding a UTF-8 character indexed by first byte.
2973 * Illegal bytes are set one. */
2974static const unsigned char utf8_bytes[256] = {
2975 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2976 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2977 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2978 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2979 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2980 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
2981 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2,
2982 3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4, 5,5,5,5,6,6,1,1,
2983};
2984
2985/* Decode UTF-8 multi-byte representation into a unicode character. */
2986static inline unsigned long
2987utf8_to_unicode(const char *string, size_t length)
2988{
2989 unsigned long unicode;
2990
2991 switch (length) {
2992 case 1:
2993 unicode = string[0];
2994 break;
2995 case 2:
2996 unicode = (string[0] & 0x1f) << 6;
2997 unicode += (string[1] & 0x3f);
2998 break;
2999 case 3:
3000 unicode = (string[0] & 0x0f) << 12;
3001 unicode += ((string[1] & 0x3f) << 6);
3002 unicode += (string[2] & 0x3f);
3003 break;
3004 case 4:
3005 unicode = (string[0] & 0x0f) << 18;
3006 unicode += ((string[1] & 0x3f) << 12);
3007 unicode += ((string[2] & 0x3f) << 6);
3008 unicode += (string[3] & 0x3f);
3009 break;
3010 case 5:
3011 unicode = (string[0] & 0x0f) << 24;
3012 unicode += ((string[1] & 0x3f) << 18);
3013 unicode += ((string[2] & 0x3f) << 12);
3014 unicode += ((string[3] & 0x3f) << 6);
3015 unicode += (string[4] & 0x3f);
3016 break;
68b6e0eb 3017 case 6:
10e290ee
JF		 3018 unicode = (string[0] & 0x01) << 30;
3019 unicode += ((string[1] & 0x3f) << 24);
3020 unicode += ((string[2] & 0x3f) << 18);
3021 unicode += ((string[3] & 0x3f) << 12);
3022 unicode += ((string[4] & 0x3f) << 6);
3023 unicode += (string[5] & 0x3f);
3024 break;
3025 default:
3026 die("Invalid unicode length");
3027 }
3028
3029 /* Invalid characters could return the special 0xfffd value but NUL
3030 * should be just as good. */
3031 return unicode > 0xffff ? 0 : unicode;
3032}
3033
3034/* Calculates how much of string can be shown within the given maximum width
3035 * and sets trimmed parameter to non-zero value if all of string could not be
3036 * shown.
3037 *
3038 * Additionally, adds to coloffset how many many columns to move to align with
3039 * the expected position. Takes into account how multi-byte and double-width
3040 * characters will effect the cursor position.
3041 *
3042 * Returns the number of bytes to output from string to satisfy max_width. */
3043static size_t
3044utf8_length(const char *string, size_t max_width, int *coloffset, int *trimmed)
3045{
3046 const char *start = string;
3047 const char *end = strchr(string, '\0');
3048 size_t mbwidth = 0;
3049 size_t width = 0;
3050
3051 *trimmed = 0;
3052
3053 while (string < end) {
3054 int c = *(unsigned char *) string;
3055 unsigned char bytes = utf8_bytes[c];
3056 size_t ucwidth;
3057 unsigned long unicode;
3058
3059 if (string + bytes > end)
3060 break;
3061
3062 /* Change representation to figure out whether
3063 * it is a single- or double-width character. */
3064
3065 unicode = utf8_to_unicode(string, bytes);
3066 /* FIXME: Graceful handling of invalid unicode character. */
3067 if (!unicode)
3068 break;
3069
3070 ucwidth = unicode_width(unicode);
3071 width += ucwidth;
3072 if (width > max_width) {
3073 *trimmed = 1;
3074 break;
3075 }
3076
3077 /* The column offset collects the differences between the
3078 * number of bytes encoding a character and the number of
3079 * columns will be used for rendering said character.
3080 *
3081 * So if some character A is encoded in 2 bytes, but will be
3082 * represented on the screen using only 1 byte this will and up
3083 * adding 1 to the multi-byte column offset.
3084 *
3085 * Assumes that no double-width character can be encoding in
3086 * less than two bytes. */
3087 if (bytes > ucwidth)
3088 mbwidth += bytes - ucwidth;
3089
3090 string += bytes;
3091 }
3092
3093 *coloffset += mbwidth;
3094
3095 return string - start;
3096}
3097
3098
3099/*
6b161b31
JF		 3100 * Status management
3101 */
2e8488b4 3102
8855ada4 3103/* Whether or not the curses interface has been initialized. */
68b6e0eb 3104static bool cursed = FALSE;
8855ada4 3105
6b161b31
JF		 3106/* The status window is used for polling keystrokes. */
3107static WINDOW *status_win;
4a2909a7 3108
2e8488b4 3109/* Update status and title window. */
4a2909a7
JF		 3110static void
3111report(const char *msg, ...)
3112{
6706b2ba
JF		 3113 static bool empty = TRUE;
3114 struct view *view = display[current_view];
b76c2afc 3115
6706b2ba
JF		 3116 if (!empty || *msg) {
3117 va_list args;
4a2909a7 3118
6706b2ba 3119 va_start(args, msg);
4b76734f 3120
6706b2ba
JF		 3121 werase(status_win);
3122 wmove(status_win, 0, 0);
3123 if (*msg) {
3124 vwprintw(status_win, msg, args);
3125 empty = FALSE;
3126 } else {
3127 empty = TRUE;
3128 }
3129 wrefresh(status_win);
b801d8b2 3130
6706b2ba
JF		 3131 va_end(args);
3132 }
3133
3134 update_view_title(view);
85af6284 3135 update_display_cursor();
b801d8b2
JF		 3136}
3137
6b161b31
JF		 3138/* Controls when nodelay should be in effect when polling user input. */
3139static void
1ba2ae4b 3140set_nonblocking_input(bool loading)
b801d8b2 3141{
6706b2ba 3142 static unsigned int loading_views;
b801d8b2 3143
6706b2ba
JF		 3144 if ((loading == FALSE && loading_views-- == 1) ||
3145 (loading == TRUE && loading_views++ == 0))
1ba2ae4b 3146 nodelay(status_win, loading);
6b161b31
JF		 3147}
3148
3149static void
3150init_display(void)
3151{
3152 int x, y;
b76c2afc 3153
6908bdbd
JF		 3154 /* Initialize the curses library */
3155 if (isatty(STDIN_FILENO)) {
8855ada4 3156 cursed = !!initscr();
6908bdbd
JF		 3157 } else {
3158 /* Leave stdin and stdout alone when acting as a pager. */
3159 FILE *io = fopen("/dev/tty", "r+");
3160
e6f60674
JF		 3161 if (!io)
3162 die("Failed to open /dev/tty");
8855ada4 3163 cursed = !!newterm(NULL, io, io);
6908bdbd
JF		 3164 }
3165
8855ada4
JF		 3166 if (!cursed)
3167 die("Failed to initialize curses");
3168
2e8488b4
JF		 3169 nonl(); /* Tell curses not to do NL->CR/NL on output */
3170 cbreak(); /* Take input chars one at a time, no wait for \n */
3171 noecho(); /* Don't echo input */
b801d8b2 3172 leaveok(stdscr, TRUE);
b801d8b2
JF		 3173
3174 if (has_colors())
3175 init_colors();
3176
3177 getmaxyx(stdscr, y, x);
3178 status_win = newwin(1, 0, y - 1, 0);
3179 if (!status_win)
3180 die("Failed to create status window");
3181
3182 /* Enable keyboard mapping */
3183 keypad(status_win, TRUE);
78c70acd 3184 wbkgdset(status_win, get_line_attr(LINE_STATUS));
6b161b31
JF		 3185}
3186
4af34daa 3187static char *
cb9e48c1 3188read_prompt(const char *prompt)
ef5404a4
JF		 3189{
3190 enum { READING, STOP, CANCEL } status = READING;
9e21ce5c 3191 static char buf[sizeof(opt_cmd) - STRING_SIZE("git \0")];
ef5404a4
JF		 3192 int pos = 0;
3193
3194 while (status == READING) {
3195 struct view *view;
3196 int i, key;
3197
699ae55b 3198 foreach_view (view, i)
ef5404a4
JF		 3199 update_view(view);
3200
cb9e48c1 3201 report("%s%.*s", prompt, pos, buf);
ef5404a4
JF		 3202 /* Refresh, accept single keystroke of input */
3203 key = wgetch(status_win);
3204 switch (key) {
3205 case KEY_RETURN:
3206 case KEY_ENTER:
3207 case '\n':
3208 status = pos ? STOP : CANCEL;
3209 break;
3210
3211 case KEY_BACKSPACE:
3212 if (pos > 0)
3213 pos--;
3214 else
3215 status = CANCEL;
3216 break;
3217
3218 case KEY_ESC:
3219 status = CANCEL;
3220 break;
3221
3222 case ERR:
3223 break;
3224
3225 default:
3226 if (pos >= sizeof(buf)) {
3227 report("Input string too long");
9e21ce5c 3228 return NULL;
ef5404a4
JF		 3229 }
3230
3231 if (isprint(key))
3232 buf[pos++] = (char) key;
3233 }
3234 }
3235
3236 if (status == CANCEL) {
3237 /* Clear the status window */
3238 report("");
9e21ce5c 3239 return NULL;
ef5404a4
JF		 3240 }
3241
3242 buf[pos++] = 0;
ef5404a4 3243
9e21ce5c 3244 return buf;
ef5404a4 3245}
c34d9c9f
JF		 3246
3247/*
3248 * Repository references
3249 */
3250
3251static struct ref *refs;
3a91b75e 3252static size_t refs_size;
c34d9c9f 3253
1307df1a
JF		 3254/* Id <-> ref store */
3255static struct ref ***id_refs;
3256static size_t id_refs_size;
3257
c34d9c9f
JF		 3258static struct ref **
3259get_refs(char *id)
3260{
1307df1a
JF		 3261 struct ref ***tmp_id_refs;
3262 struct ref **ref_list = NULL;
3263 size_t ref_list_size = 0;
c34d9c9f
JF		 3264 size_t i;
3265
1307df1a
JF		 3266 for (i = 0; i < id_refs_size; i++)
3267 if (!strcmp(id, id_refs[i][0]->id))
3268 return id_refs[i];
3269
3270 tmp_id_refs = realloc(id_refs, (id_refs_size + 1) * sizeof(*id_refs));
3271 if (!tmp_id_refs)
3272 return NULL;
3273
3274 id_refs = tmp_id_refs;
3275
c34d9c9f
JF		 3276 for (i = 0; i < refs_size; i++) {
3277 struct ref **tmp;
3278
3279 if (strcmp(id, refs[i].id))
3280 continue;
3281
1307df1a 3282 tmp = realloc(ref_list, (ref_list_size + 1) * sizeof(*ref_list));
c34d9c9f 3283 if (!tmp) {
1307df1a
JF		 3284 if (ref_list)
3285 free(ref_list);
c34d9c9f
JF		 3286 return NULL;
3287 }
3288
1307df1a
JF		 3289 ref_list = tmp;
3290 if (ref_list_size > 0)
3291 ref_list[ref_list_size - 1]->next = 1;
3292 ref_list[ref_list_size] = &refs[i];
3af8774e
JF		 3293
3294 /* XXX: The properties of the commit chains ensures that we can
3295 * safely modify the shared ref. The repo references will
3296 * always be similar for the same id. */
1307df1a
JF		 3297 ref_list[ref_list_size]->next = 0;
3298 ref_list_size++;
c34d9c9f
JF		 3299 }
3300
1307df1a
JF		 3301 if (ref_list)
3302 id_refs[id_refs_size++] = ref_list;
3303
3304 return ref_list;
c34d9c9f
JF		 3305}
3306
3307static int
d0cea5f9 3308read_ref(char *id, int idlen, char *name, int namelen)
c34d9c9f 3309{
d0cea5f9
JF		 3310 struct ref *ref;
3311 bool tag = FALSE;
d0cea5f9 3312
8b0297ae
JF		 3313 if (!strncmp(name, "refs/tags/", STRING_SIZE("refs/tags/"))) {
3314 /* Commits referenced by tags has "^{}" appended. */
3315 if (name[namelen - 1] != '}')
3316 return OK;
3317
d0cea5f9
JF		 3318 while (namelen > 0 && name[namelen] != '^')
3319 namelen--;
c34d9c9f 3320
d0cea5f9 3321 tag = TRUE;
8b0297ae
JF		 3322 namelen -= STRING_SIZE("refs/tags/");
3323 name += STRING_SIZE("refs/tags/");
c34d9c9f 3324
d0cea5f9 3325 } else if (!strncmp(name, "refs/heads/", STRING_SIZE("refs/heads/"))) {
8b0297ae
JF		 3326 namelen -= STRING_SIZE("refs/heads/");
3327 name += STRING_SIZE("refs/heads/");
c34d9c9f 3328
d0cea5f9
JF		 3329 } else if (!strcmp(name, "HEAD")) {
3330 return OK;
3331 }
6706b2ba 3332
d0cea5f9
JF		 3333 refs = realloc(refs, sizeof(*refs) * (refs_size + 1));
3334 if (!refs)
3335 return ERR;
c34d9c9f 3336
d0cea5f9 3337 ref = &refs[refs_size++];
8b0297ae 3338 ref->name = malloc(namelen + 1);
d0cea5f9
JF		 3339 if (!ref->name)
3340 return ERR;
3af8774e 3341
8b0297ae
JF		 3342 strncpy(ref->name, name, namelen);
3343 ref->name[namelen] = 0;
d0cea5f9
JF		 3344 ref->tag = tag;
3345 string_copy(ref->id, id);
3af8774e 3346
d0cea5f9
JF		 3347 return OK;
3348}
c34d9c9f 3349
d0cea5f9
JF		 3350static int
3351load_refs(void)
3352{
3353 const char *cmd_env = getenv("TIG_LS_REMOTE");
3354 const char *cmd = cmd_env && *cmd_env ? cmd_env : TIG_LS_REMOTE;
c34d9c9f 3355
4a63c884 3356 return read_properties(popen(cmd, "r"), "\t", read_ref);
d0cea5f9 3357}
c34d9c9f 3358
d0cea5f9 3359static int
14c778a6 3360read_repo_config_option(char *name, int namelen, char *value, int valuelen)
d0cea5f9 3361{
22913179 3362 if (!strcmp(name, "i18n.commitencoding"))
d0cea5f9 3363 string_copy(opt_encoding, value);
c34d9c9f 3364
c34d9c9f
JF		 3365 return OK;
3366}
3367
4670cf89 3368static int
14c778a6 3369load_repo_config(void)
4670cf89 3370{
66749723 3371 return read_properties(popen("git repo-config --list", "r"),
14c778a6 3372 "=", read_repo_config_option);
d0cea5f9
JF		 3373}
3374
3375static int
4a63c884 3376read_properties(FILE *pipe, const char *separators,
d0cea5f9
JF		 3377 int (*read_property)(char *, int, char *, int))
3378{
4670cf89
JF		 3379 char buffer[BUFSIZ];
3380 char *name;
d0cea5f9 3381 int state = OK;
4670cf89
JF		 3382
3383 if (!pipe)
3384 return ERR;
3385
d0cea5f9 3386 while (state == OK && (name = fgets(buffer, sizeof(buffer), pipe))) {
4a63c884
JF		 3387 char *value;
3388 size_t namelen;
3389 size_t valuelen;
4670cf89 3390
4a63c884
JF		 3391 name = chomp_string(name);
3392 namelen = strcspn(name, separators);
3393
3394 if (name[namelen]) {
3395 name[namelen] = 0;
3396 value = chomp_string(name + namelen + 1);
d0cea5f9 3397 valuelen = strlen(value);
4670cf89 3398
d0cea5f9 3399 } else {
d0cea5f9
JF		 3400 value = "";
3401 valuelen = 0;
4670cf89 3402 }
d0cea5f9 3403
3c3801c2 3404 state = read_property(name, namelen, value, valuelen);
4670cf89
JF		 3405 }
3406
d0cea5f9
JF		 3407 if (state != ERR && ferror(pipe))
3408 state = ERR;
4670cf89
JF		 3409
3410 pclose(pipe);
3411
d0cea5f9 3412 return state;
4670cf89
JF		 3413}
3414
d0cea5f9 3415
6b161b31
JF		 3416/*
3417 * Main
3418 */
3419
b5c9e67f 3420static void __NORETURN
6b161b31
JF		 3421quit(int sig)
3422{
8855ada4
JF		 3423 /* XXX: Restore tty modes and let the OS cleanup the rest! */
3424 if (cursed)
3425 endwin();
6b161b31
JF		 3426 exit(0);
3427}
3428
c6704a4e
JF		 3429static void __NORETURN
3430die(const char *err, ...)
6b161b31
JF		 3431{
3432 va_list args;
3433
3434 endwin();
3435
3436 va_start(args, err);
3437 fputs("tig: ", stderr);
3438 vfprintf(stderr, err, args);
3439 fputs("\n", stderr);
3440 va_end(args);
3441
3442 exit(1);
3443}
3444
3445int
3446main(int argc, char *argv[])
3447{
1ba2ae4b 3448 struct view *view;
6b161b31 3449 enum request request;
1ba2ae4b 3450 size_t i;
6b161b31
JF		 3451
3452 signal(SIGINT, quit);
3453
6b68fd24
JF		 3454 if (setlocale(LC_ALL, "")) {
3455 string_copy(opt_codeset, nl_langinfo(CODESET));
3456 }
3457
660e09ad
JF		 3458 if (load_options() == ERR)
3459 die("Failed to load user config.");
3460
3461 /* Load the repo config file so options can be overwritten from
afdc35b3 3462 * the command line. */
14c778a6 3463 if (load_repo_config() == ERR)
afdc35b3
JF		 3464 die("Failed to load repo config.");
3465
8855ada4 3466 if (!parse_options(argc, argv))
6b161b31
JF		 3467 return 0;
3468
6b68fd24
JF		 3469 if (*opt_codeset && strcmp(opt_codeset, opt_encoding)) {
3470 opt_iconv = iconv_open(opt_codeset, opt_encoding);
20f4b4a3 3471 if (opt_iconv == ICONV_NONE)
6b68fd24
JF		 3472 die("Failed to initialize character set conversion");
3473 }
3474
c34d9c9f
JF		 3475 if (load_refs() == ERR)
3476 die("Failed to load refs.");
3477
7bb55251
JF		 3478 /* Require a git repository unless when running in pager mode. */
3479 if (refs_size == 0 && opt_request != REQ_VIEW_PAGER)
3480 die("Not a git repository");
3481
1ba2ae4b
JF		 3482 for (i = 0; i < ARRAY_SIZE(views) && (view = &views[i]); i++)
3483 view->cmd_env = getenv(view->cmd_env);
3484
6b161b31
JF		 3485 request = opt_request;
3486
3487 init_display();
b801d8b2
JF		 3488
3489 while (view_driver(display[current_view], request)) {
6b161b31 3490 int key;
b801d8b2
JF		 3491 int i;
3492
699ae55b 3493 foreach_view (view, i)
6b161b31 3494 update_view(view);
b801d8b2
JF		 3495
3496 /* Refresh, accept single keystroke of input */
6b161b31 3497 key = wgetch(status_win);
04e2b7b2
JF		 3498
3499 request = get_keybinding(display[current_view]->keymap, key);
03a93dbb 3500
6706b2ba 3501 /* Some low-level request handling. This keeps access to
fac7db6c
JF		 3502 * status_win restricted. */
3503 switch (request) {
3504 case REQ_PROMPT:
9e21ce5c
JF		 3505 {
3506 char *cmd = read_prompt(":");
3507
3508 if (cmd && string_format(opt_cmd, "git %s", cmd)) {
3509 if (strncmp(cmd, "show", 4) && isspace(cmd[4])) {
3510 opt_request = REQ_VIEW_DIFF;
3511 } else {
3512 opt_request = REQ_VIEW_PAGER;
3513 }
3514 break;
3515 }
fac7db6c 3516
1d754561 3517 request = REQ_NONE;
9e21ce5c
JF		 3518 break;
3519 }
4af34daa
JF		 3520 case REQ_SEARCH:
3521 case REQ_SEARCH_BACK:
3522 {
3523 const char *prompt = request == REQ_SEARCH
3524 ? "/" : "?";
3525 char *search = read_prompt(prompt);
3526
3527 if (search)
3528 string_copy(opt_search, search);
3529 else
3530 request = REQ_NONE;
3531 break;
3532 }
fac7db6c
JF		 3533 case REQ_SCREEN_RESIZE:
3534 {
3535 int height, width;
3536
3537 getmaxyx(stdscr, height, width);
3538
3539 /* Resize the status view and let the view driver take
3540 * care of resizing the displayed views. */
3541 wresize(status_win, 1, width);
3542 mvwin(status_win, height - 1, 0);
3543 wrefresh(status_win);
3544 break;
3545 }
3546 default:
3547 break;
03a93dbb 3548 }
b801d8b2
JF		 3549 }
3550
3551 quit(0);
3552
3553 return 0;
3554}
Full-screen terminal Git browser.