1 /*
2  * Copyright (c) 2018, 2019, 2020 Stefan Sperling <stsp@openbsd.org>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "got_compat.h"
18 
19 #include <sys/queue.h>
20 #include <sys/stat.h>
21 #include <sys/ioctl.h>
22 
23 #include <ctype.h>
24 #include <errno.h>
25 #if defined(__FreeBSD__) || defined(__APPLE__)
26 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
27 #endif
28 #include <curses.h>
29 #include <panel.h>
30 #include <locale.h>
31 #include <signal.h>
32 #include <stdlib.h>
33 #include <stdarg.h>
34 #include <stdio.h>
35 #include <getopt.h>
36 #include <string.h>
37 #include <err.h>
38 #include <unistd.h>
39 #include <limits.h>
40 #include <wchar.h>
41 #include <time.h>
42 #include <pthread.h>
43 #include <libgen.h>
44 #include <regex.h>
45 #include <sched.h>
46 
47 #include "got_version.h"
48 #include "got_error.h"
49 #include "got_object.h"
50 #include "got_reference.h"
51 #include "got_repository.h"
52 #include "got_diff.h"
53 #include "got_opentemp.h"
54 #include "got_utf8.h"
55 #include "got_cancel.h"
56 #include "got_commit_graph.h"
57 #include "got_blame.h"
58 #include "got_privsep.h"
59 #include "got_path.h"
60 #include "got_worktree.h"
61 
62 #ifndef MIN
63 #define	MIN(_a,_b) ((_a) < (_b) ? (_a) : (_b))
64 #endif
65 
66 #ifndef MAX
67 #define	MAX(_a,_b) ((_a) > (_b) ? (_a) : (_b))
68 #endif
69 
70 #ifndef CTRL
71 #define CTRL(x)		((x) & 0x1f)
72 #endif
73 
74 #ifndef nitems
75 #define nitems(_a)	(sizeof((_a)) / sizeof((_a)[0]))
76 #endif
77 
78 struct tog_cmd {
79 	const char *name;
80 	const struct got_error *(*cmd_main)(int, char *[]);
81 	void (*cmd_usage)(void);
82 };
83 
84 __dead static void	usage(int, int);
85 __dead static void	usage_log(void);
86 __dead static void	usage_diff(void);
87 __dead static void	usage_blame(void);
88 __dead static void	usage_tree(void);
89 __dead static void	usage_ref(void);
90 
91 static const struct got_error*	cmd_log(int, char *[]);
92 static const struct got_error*	cmd_diff(int, char *[]);
93 static const struct got_error*	cmd_blame(int, char *[]);
94 static const struct got_error*	cmd_tree(int, char *[]);
95 static const struct got_error*	cmd_ref(int, char *[]);
96 
97 static const struct tog_cmd tog_commands[] = {
98 	{ "log",	cmd_log,	usage_log },
99 	{ "diff",	cmd_diff,	usage_diff },
100 	{ "blame",	cmd_blame,	usage_blame },
101 	{ "tree",	cmd_tree,	usage_tree },
102 	{ "ref",	cmd_ref,	usage_ref },
103 };
104 
105 enum tog_view_type {
106 	TOG_VIEW_DIFF,
107 	TOG_VIEW_LOG,
108 	TOG_VIEW_BLAME,
109 	TOG_VIEW_TREE,
110 	TOG_VIEW_REF,
111 	TOG_VIEW_HELP
112 };
113 
114 /* Match _DIFF to _HELP with enum tog_view_type TOG_VIEW_* counterparts. */
115 enum tog_keymap_type {
116 	TOG_KEYMAP_KEYS = -2,
117 	TOG_KEYMAP_GLOBAL,
118 	TOG_KEYMAP_DIFF,
119 	TOG_KEYMAP_LOG,
120 	TOG_KEYMAP_BLAME,
121 	TOG_KEYMAP_TREE,
122 	TOG_KEYMAP_REF,
123 	TOG_KEYMAP_HELP
124 };
125 
126 enum tog_view_mode {
127 	TOG_VIEW_SPLIT_NONE,
128 	TOG_VIEW_SPLIT_VERT,
129 	TOG_VIEW_SPLIT_HRZN
130 };
131 
132 #define HSPLIT_SCALE	0.3  /* default horizontal split scale */
133 
134 #define TOG_EOF_STRING	"(END)"
135 
136 struct commit_queue_entry {
137 	TAILQ_ENTRY(commit_queue_entry) entry;
138 	struct got_object_id *id;
139 	struct got_commit_object *commit;
140 	int idx;
141 };
142 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
143 struct commit_queue {
144 	int ncommits;
145 	struct commit_queue_head head;
146 };
147 
148 struct tog_color {
149 	STAILQ_ENTRY(tog_color) entry;
150 	regex_t regex;
151 	short colorpair;
152 };
153 STAILQ_HEAD(tog_colors, tog_color);
154 
155 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
156 static struct got_reflist_object_id_map *tog_refs_idmap;
157 static enum got_diff_algorithm tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
158 
159 static const struct got_error *
160 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
161     struct got_reference* re2)
162 {
163 	const char *name1 = got_ref_get_name(re1);
164 	const char *name2 = got_ref_get_name(re2);
165 	int isbackup1, isbackup2;
166 
167 	/* Sort backup refs towards the bottom of the list. */
168 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
169 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
170 	if (!isbackup1 && isbackup2) {
171 		*cmp = -1;
172 		return NULL;
173 	} else if (isbackup1 && !isbackup2) {
174 		*cmp = 1;
175 		return NULL;
176 	}
177 
178 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
179 	return NULL;
180 }
181 
182 static const struct got_error *
183 tog_load_refs(struct got_repository *repo, int sort_by_date)
184 {
185 	const struct got_error *err;
186 
187 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
188 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
189 	    repo);
190 	if (err)
191 		return err;
192 
193 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
194 	    repo);
195 }
196 
197 static void
198 tog_free_refs(void)
199 {
200 	if (tog_refs_idmap) {
201 		got_reflist_object_id_map_free(tog_refs_idmap);
202 		tog_refs_idmap = NULL;
203 	}
204 	got_ref_list_free(&tog_refs);
205 }
206 
207 static const struct got_error *
208 add_color(struct tog_colors *colors, const char *pattern,
209     int idx, short color)
210 {
211 	const struct got_error *err = NULL;
212 	struct tog_color *tc;
213 	int regerr = 0;
214 
215 	if (idx < 1 || idx > COLOR_PAIRS - 1)
216 		return NULL;
217 
218 	init_pair(idx, color, -1);
219 
220 	tc = calloc(1, sizeof(*tc));
221 	if (tc == NULL)
222 		return got_error_from_errno("calloc");
223 	regerr = regcomp(&tc->regex, pattern,
224 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
225 	if (regerr) {
226 		static char regerr_msg[512];
227 		static char err_msg[512];
228 		regerror(regerr, &tc->regex, regerr_msg,
229 		    sizeof(regerr_msg));
230 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
231 		    regerr_msg);
232 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
233 		free(tc);
234 		return err;
235 	}
236 	tc->colorpair = idx;
237 	STAILQ_INSERT_HEAD(colors, tc, entry);
238 	return NULL;
239 }
240 
241 static void
242 free_colors(struct tog_colors *colors)
243 {
244 	struct tog_color *tc;
245 
246 	while (!STAILQ_EMPTY(colors)) {
247 		tc = STAILQ_FIRST(colors);
248 		STAILQ_REMOVE_HEAD(colors, entry);
249 		regfree(&tc->regex);
250 		free(tc);
251 	}
252 }
253 
254 static struct tog_color *
255 get_color(struct tog_colors *colors, int colorpair)
256 {
257 	struct tog_color *tc = NULL;
258 
259 	STAILQ_FOREACH(tc, colors, entry) {
260 		if (tc->colorpair == colorpair)
261 			return tc;
262 	}
263 
264 	return NULL;
265 }
266 
267 static int
268 default_color_value(const char *envvar)
269 {
270 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
271 		return COLOR_MAGENTA;
272 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
273 		return COLOR_CYAN;
274 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
275 		return COLOR_YELLOW;
276 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
277 		return COLOR_GREEN;
278 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
279 		return COLOR_MAGENTA;
280 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
281 		return COLOR_MAGENTA;
282 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
283 		return COLOR_CYAN;
284 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
285 		return COLOR_GREEN;
286 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
287 		return COLOR_GREEN;
288 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
289 		return COLOR_CYAN;
290 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
291 		return COLOR_YELLOW;
292 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
293 		return COLOR_GREEN;
294 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
295 		return COLOR_MAGENTA;
296 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
297 		return COLOR_YELLOW;
298 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
299 		return COLOR_CYAN;
300 
301 	return -1;
302 }
303 
304 static int
305 get_color_value(const char *envvar)
306 {
307 	const char *val = getenv(envvar);
308 
309 	if (val == NULL)
310 		return default_color_value(envvar);
311 
312 	if (strcasecmp(val, "black") == 0)
313 		return COLOR_BLACK;
314 	if (strcasecmp(val, "red") == 0)
315 		return COLOR_RED;
316 	if (strcasecmp(val, "green") == 0)
317 		return COLOR_GREEN;
318 	if (strcasecmp(val, "yellow") == 0)
319 		return COLOR_YELLOW;
320 	if (strcasecmp(val, "blue") == 0)
321 		return COLOR_BLUE;
322 	if (strcasecmp(val, "magenta") == 0)
323 		return COLOR_MAGENTA;
324 	if (strcasecmp(val, "cyan") == 0)
325 		return COLOR_CYAN;
326 	if (strcasecmp(val, "white") == 0)
327 		return COLOR_WHITE;
328 	if (strcasecmp(val, "default") == 0)
329 		return -1;
330 
331 	return default_color_value(envvar);
332 }
333 
334 struct tog_diff_view_state {
335 	struct got_object_id *id1, *id2;
336 	const char *label1, *label2;
337 	FILE *f, *f1, *f2;
338 	int fd1, fd2;
339 	int lineno;
340 	int first_displayed_line;
341 	int last_displayed_line;
342 	int eof;
343 	int diff_context;
344 	int ignore_whitespace;
345 	int force_text_diff;
346 	struct got_repository *repo;
347 	struct got_diff_line *lines;
348 	size_t nlines;
349 	int matched_line;
350 	int selected_line;
351 
352 	/* passed from log or blame view; may be NULL */
353 	struct tog_view *parent_view;
354 };
355 
356 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
357 static volatile sig_atomic_t tog_thread_error;
358 
359 struct tog_log_thread_args {
360 	pthread_cond_t need_commits;
361 	pthread_cond_t commit_loaded;
362 	int commits_needed;
363 	int load_all;
364 	struct got_commit_graph *graph;
365 	struct commit_queue *real_commits;
366 	const char *in_repo_path;
367 	struct got_object_id *start_id;
368 	struct got_repository *repo;
369 	int *pack_fds;
370 	int log_complete;
371 	sig_atomic_t *quit;
372 	struct commit_queue_entry **first_displayed_entry;
373 	struct commit_queue_entry **selected_entry;
374 	int *searching;
375 	int *search_next_done;
376 	regex_t *regex;
377 	int *limiting;
378 	int limit_match;
379 	regex_t *limit_regex;
380 	struct commit_queue *limit_commits;
381 };
382 
383 struct tog_log_view_state {
384 	struct commit_queue *commits;
385 	struct commit_queue_entry *first_displayed_entry;
386 	struct commit_queue_entry *last_displayed_entry;
387 	struct commit_queue_entry *selected_entry;
388 	struct commit_queue real_commits;
389 	int selected;
390 	char *in_repo_path;
391 	char *head_ref_name;
392 	int log_branches;
393 	struct got_repository *repo;
394 	struct got_object_id *start_id;
395 	sig_atomic_t quit;
396 	pthread_t thread;
397 	struct tog_log_thread_args thread_args;
398 	struct commit_queue_entry *matched_entry;
399 	struct commit_queue_entry *search_entry;
400 	struct tog_colors colors;
401 	int use_committer;
402 	int limit_view;
403 	regex_t limit_regex;
404 	struct commit_queue limit_commits;
405 };
406 
407 #define TOG_COLOR_DIFF_MINUS		1
408 #define TOG_COLOR_DIFF_PLUS		2
409 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
410 #define TOG_COLOR_DIFF_META		4
411 #define TOG_COLOR_TREE_SUBMODULE	5
412 #define TOG_COLOR_TREE_SYMLINK		6
413 #define TOG_COLOR_TREE_DIRECTORY	7
414 #define TOG_COLOR_TREE_EXECUTABLE	8
415 #define TOG_COLOR_COMMIT		9
416 #define TOG_COLOR_AUTHOR		10
417 #define TOG_COLOR_DATE			11
418 #define TOG_COLOR_REFS_HEADS		12
419 #define TOG_COLOR_REFS_TAGS		13
420 #define TOG_COLOR_REFS_REMOTES		14
421 #define TOG_COLOR_REFS_BACKUP		15
422 
423 struct tog_blame_cb_args {
424 	struct tog_blame_line *lines; /* one per line */
425 	int nlines;
426 
427 	struct tog_view *view;
428 	struct got_object_id *commit_id;
429 	int *quit;
430 };
431 
432 struct tog_blame_thread_args {
433 	const char *path;
434 	struct got_repository *repo;
435 	struct tog_blame_cb_args *cb_args;
436 	int *complete;
437 	got_cancel_cb cancel_cb;
438 	void *cancel_arg;
439 };
440 
441 struct tog_blame {
442 	FILE *f;
443 	off_t filesize;
444 	struct tog_blame_line *lines;
445 	int nlines;
446 	off_t *line_offsets;
447 	pthread_t thread;
448 	struct tog_blame_thread_args thread_args;
449 	struct tog_blame_cb_args cb_args;
450 	const char *path;
451 	int *pack_fds;
452 };
453 
454 struct tog_blame_view_state {
455 	int first_displayed_line;
456 	int last_displayed_line;
457 	int selected_line;
458 	int last_diffed_line;
459 	int blame_complete;
460 	int eof;
461 	int done;
462 	struct got_object_id_queue blamed_commits;
463 	struct got_object_qid *blamed_commit;
464 	char *path;
465 	struct got_repository *repo;
466 	struct got_object_id *commit_id;
467 	struct got_object_id *id_to_log;
468 	struct tog_blame blame;
469 	int matched_line;
470 	struct tog_colors colors;
471 };
472 
473 struct tog_parent_tree {
474 	TAILQ_ENTRY(tog_parent_tree) entry;
475 	struct got_tree_object *tree;
476 	struct got_tree_entry *first_displayed_entry;
477 	struct got_tree_entry *selected_entry;
478 	int selected;
479 };
480 
481 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
482 
483 struct tog_tree_view_state {
484 	char *tree_label;
485 	struct got_object_id *commit_id;/* commit which this tree belongs to */
486 	struct got_tree_object *root;	/* the commit's root tree entry */
487 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
488 	struct got_tree_entry *first_displayed_entry;
489 	struct got_tree_entry *last_displayed_entry;
490 	struct got_tree_entry *selected_entry;
491 	int ndisplayed, selected, show_ids;
492 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
493 	char *head_ref_name;
494 	struct got_repository *repo;
495 	struct got_tree_entry *matched_entry;
496 	struct tog_colors colors;
497 };
498 
499 struct tog_reflist_entry {
500 	TAILQ_ENTRY(tog_reflist_entry) entry;
501 	struct got_reference *ref;
502 	int idx;
503 };
504 
505 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
506 
507 struct tog_ref_view_state {
508 	struct tog_reflist_head refs;
509 	struct tog_reflist_entry *first_displayed_entry;
510 	struct tog_reflist_entry *last_displayed_entry;
511 	struct tog_reflist_entry *selected_entry;
512 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
513 	struct got_repository *repo;
514 	struct tog_reflist_entry *matched_entry;
515 	struct tog_colors colors;
516 };
517 
518 struct tog_help_view_state {
519 	FILE			*f;
520 	off_t			*line_offsets;
521 	size_t			 nlines;
522 	int			 lineno;
523 	int			 first_displayed_line;
524 	int			 last_displayed_line;
525 	int			 eof;
526 	int			 matched_line;
527 	int			 selected_line;
528 	int			 all;
529 	enum tog_keymap_type	 type;
530 };
531 
532 #define GENERATE_HELP \
533 	KEYMAP_("Global", TOG_KEYMAP_GLOBAL), \
534 	KEY_("H F1", "Open view-specific help (double tap for all help)"), \
535 	KEY_("k C-p Up", "Move cursor or page up one line"), \
536 	KEY_("j C-n Down", "Move cursor or page down one line"), \
537 	KEY_("C-b b PgUp", "Scroll the view up one page"), \
538 	KEY_("C-f f PgDn Space", "Scroll the view down one page"), \
539 	KEY_("C-u u", "Scroll the view up one half page"), \
540 	KEY_("C-d d", "Scroll the view down one half page"), \
541 	KEY_("g", "Go to line N (default: first line)"), \
542 	KEY_("Home =", "Go to the first line"), \
543 	KEY_("G", "Go to line N (default: last line)"), \
544 	KEY_("End *", "Go to the last line"), \
545 	KEY_("l Right", "Scroll the view right"), \
546 	KEY_("h Left", "Scroll the view left"), \
547 	KEY_("$", "Scroll view to the rightmost position"), \
548 	KEY_("0", "Scroll view to the leftmost position"), \
549 	KEY_("-", "Decrease size of the focussed split"), \
550 	KEY_("+", "Increase size of the focussed split"), \
551 	KEY_("Tab", "Switch focus between views"), \
552 	KEY_("F", "Toggle fullscreen mode"), \
553 	KEY_("S", "Switch split-screen layout"), \
554 	KEY_("/", "Open prompt to enter search term"), \
555 	KEY_("n", "Find next line/token matching the current search term"), \
556 	KEY_("N", "Find previous line/token matching the current search term"),\
557 	KEY_("q", "Quit the focussed view; Quit help screen"), \
558 	KEY_("Q", "Quit tog"), \
559 	\
560 	KEYMAP_("Log view", TOG_KEYMAP_LOG), \
561 	KEY_("< ,", "Move cursor up one commit"), \
562 	KEY_("> .", "Move cursor down one commit"), \
563 	KEY_("Enter", "Open diff view of the selected commit"), \
564 	KEY_("B", "Reload the log view and toggle display of merged commits"), \
565 	KEY_("R", "Open ref view of all repository references"), \
566 	KEY_("T", "Display tree view of the repository from the selected" \
567 	    " commit"), \
568 	KEY_("@", "Toggle between displaying author and committer name"), \
569 	KEY_("&", "Open prompt to enter term to limit commits displayed"), \
570 	KEY_("C-g Backspace", "Cancel current search or log operation"), \
571 	KEY_("C-l", "Reload the log view with new commits in the repository"), \
572 	\
573 	KEYMAP_("Diff view", TOG_KEYMAP_DIFF), \
574 	KEY_("K < ,", "Display diff of next line in the file/log entry"), \
575 	KEY_("J > .", "Display diff of previous line in the file/log entry"), \
576 	KEY_("A", "Toggle between Myers and Patience diff algorithm"), \
577 	KEY_("a", "Toggle treatment of file as ASCII irrespective of binary" \
578 	    " data"), \
579 	KEY_("(", "Go to the previous file in the diff"), \
580 	KEY_(")", "Go to the next file in the diff"), \
581 	KEY_("{", "Go to the previous hunk in the diff"), \
582 	KEY_("}", "Go to the next hunk in the diff"), \
583 	KEY_("[", "Decrease the number of context lines"), \
584 	KEY_("]", "Increase the number of context lines"), \
585 	KEY_("w", "Toggle ignore whitespace-only changes in the diff"), \
586 	\
587 	KEYMAP_("Blame view", TOG_KEYMAP_BLAME), \
588 	KEY_("Enter", "Display diff view of the selected line's commit"), \
589 	KEY_("A", "Toggle diff algorithm between Myers and Patience"), \
590 	KEY_("L", "Open log view for the currently selected annotated line"), \
591 	KEY_("C", "Reload view with the previously blamed commit"), \
592 	KEY_("c", "Reload view with the version of the file found in the" \
593 	    " selected line's commit"), \
594 	KEY_("p", "Reload view with the version of the file found in the" \
595 	    " selected line's parent commit"), \
596 	\
597 	KEYMAP_("Tree view", TOG_KEYMAP_TREE), \
598 	KEY_("Enter", "Enter selected directory or open blame view of the" \
599 	    " selected file"), \
600 	KEY_("L", "Open log view for the selected entry"), \
601 	KEY_("R", "Open ref view of all repository references"), \
602 	KEY_("i", "Show object IDs for all tree entries"), \
603 	KEY_("Backspace", "Return to the parent directory"), \
604 	\
605 	KEYMAP_("Ref view", TOG_KEYMAP_REF), \
606 	KEY_("Enter", "Display log view of the selected reference"), \
607 	KEY_("T", "Display tree view of the selected reference"), \
608 	KEY_("i", "Toggle display of IDs for all non-symbolic references"), \
609 	KEY_("m", "Toggle display of last modified date for each reference"), \
610 	KEY_("o", "Toggle reference sort order (name -> timestamp)"), \
611 	KEY_("C-l", "Reload view with all repository references")
612 
613 struct tog_key_map {
614 	const char		*keys;
615 	const char		*info;
616 	enum tog_keymap_type	 type;
617 };
618 
619 /* curses io for tog regress */
620 struct tog_io {
621 	FILE	*cin;
622 	FILE	*cout;
623 	FILE	*f;
624 } tog_io;
625 static int using_mock_io;
626 
627 #define TOG_SCREEN_DUMP		"SCREENDUMP"
628 #define TOG_SCREEN_DUMP_LEN	(sizeof(TOG_SCREEN_DUMP) - 1)
629 #define TOG_KEY_SCRDUMP		SHRT_MIN
630 
631 /*
632  * We implement two types of views: parent views and child views.
633  *
634  * The 'Tab' key switches focus between a parent view and its child view.
635  * Child views are shown side-by-side to their parent view, provided
636  * there is enough screen estate.
637  *
638  * When a new view is opened from within a parent view, this new view
639  * becomes a child view of the parent view, replacing any existing child.
640  *
641  * When a new view is opened from within a child view, this new view
642  * becomes a parent view which will obscure the views below until the
643  * user quits the new parent view by typing 'q'.
644  *
645  * This list of views contains parent views only.
646  * Child views are only pointed to by their parent view.
647  */
648 TAILQ_HEAD(tog_view_list_head, tog_view);
649 
650 struct tog_view {
651 	TAILQ_ENTRY(tog_view) entry;
652 	WINDOW *window;
653 	PANEL *panel;
654 	int nlines, ncols, begin_y, begin_x; /* based on split height/width */
655 	int resized_y, resized_x; /* begin_y/x based on user resizing */
656 	int maxx, x; /* max column and current start column */
657 	int lines, cols; /* copies of LINES and COLS */
658 	int nscrolled, offset; /* lines scrolled and hsplit line offset */
659 	int gline, hiline; /* navigate to and highlight this nG line */
660 	int ch, count; /* current keymap and count prefix */
661 	int resized; /* set when in a resize event */
662 	int focussed; /* Only set on one parent or child view at a time. */
663 	int dying;
664 	struct tog_view *parent;
665 	struct tog_view *child;
666 
667 	/*
668 	 * This flag is initially set on parent views when a new child view
669 	 * is created. It gets toggled when the 'Tab' key switches focus
670 	 * between parent and child.
671 	 * The flag indicates whether focus should be passed on to our child
672 	 * view if this parent view gets picked for focus after another parent
673 	 * view was closed. This prevents child views from losing focus in such
674 	 * situations.
675 	 */
676 	int focus_child;
677 
678 	enum tog_view_mode mode;
679 	/* type-specific state */
680 	enum tog_view_type type;
681 	union {
682 		struct tog_diff_view_state diff;
683 		struct tog_log_view_state log;
684 		struct tog_blame_view_state blame;
685 		struct tog_tree_view_state tree;
686 		struct tog_ref_view_state ref;
687 		struct tog_help_view_state help;
688 	} state;
689 
690 	const struct got_error *(*show)(struct tog_view *);
691 	const struct got_error *(*input)(struct tog_view **,
692 	    struct tog_view *, int);
693 	const struct got_error *(*reset)(struct tog_view *);
694 	const struct got_error *(*resize)(struct tog_view *, int);
695 	const struct got_error *(*close)(struct tog_view *);
696 
697 	const struct got_error *(*search_start)(struct tog_view *);
698 	const struct got_error *(*search_next)(struct tog_view *);
699 	void (*search_setup)(struct tog_view *, FILE **, off_t **, size_t *,
700 	    int **, int **, int **, int **);
701 	int search_started;
702 	int searching;
703 #define TOG_SEARCH_FORWARD	1
704 #define TOG_SEARCH_BACKWARD	2
705 	int search_next_done;
706 #define TOG_SEARCH_HAVE_MORE	1
707 #define TOG_SEARCH_NO_MORE	2
708 #define TOG_SEARCH_HAVE_NONE	3
709 	regex_t regex;
710 	regmatch_t regmatch;
711 	const char *action;
712 };
713 
714 static const struct got_error *open_diff_view(struct tog_view *,
715     struct got_object_id *, struct got_object_id *,
716     const char *, const char *, int, int, int, struct tog_view *,
717     struct got_repository *);
718 static const struct got_error *show_diff_view(struct tog_view *);
719 static const struct got_error *input_diff_view(struct tog_view **,
720     struct tog_view *, int);
721 static const struct got_error *reset_diff_view(struct tog_view *);
722 static const struct got_error* close_diff_view(struct tog_view *);
723 static const struct got_error *search_start_diff_view(struct tog_view *);
724 static void search_setup_diff_view(struct tog_view *, FILE **, off_t **,
725     size_t *, int **, int **, int **, int **);
726 static const struct got_error *search_next_view_match(struct tog_view *);
727 
728 static const struct got_error *open_log_view(struct tog_view *,
729     struct got_object_id *, struct got_repository *,
730     const char *, const char *, int);
731 static const struct got_error * show_log_view(struct tog_view *);
732 static const struct got_error *input_log_view(struct tog_view **,
733     struct tog_view *, int);
734 static const struct got_error *resize_log_view(struct tog_view *, int);
735 static const struct got_error *close_log_view(struct tog_view *);
736 static const struct got_error *search_start_log_view(struct tog_view *);
737 static const struct got_error *search_next_log_view(struct tog_view *);
738 
739 static const struct got_error *open_blame_view(struct tog_view *, char *,
740     struct got_object_id *, struct got_repository *);
741 static const struct got_error *show_blame_view(struct tog_view *);
742 static const struct got_error *input_blame_view(struct tog_view **,
743     struct tog_view *, int);
744 static const struct got_error *reset_blame_view(struct tog_view *);
745 static const struct got_error *close_blame_view(struct tog_view *);
746 static const struct got_error *search_start_blame_view(struct tog_view *);
747 static void search_setup_blame_view(struct tog_view *, FILE **, off_t **,
748     size_t *, int **, int **, int **, int **);
749 
750 static const struct got_error *open_tree_view(struct tog_view *,
751     struct got_object_id *, const char *, struct got_repository *);
752 static const struct got_error *show_tree_view(struct tog_view *);
753 static const struct got_error *input_tree_view(struct tog_view **,
754     struct tog_view *, int);
755 static const struct got_error *close_tree_view(struct tog_view *);
756 static const struct got_error *search_start_tree_view(struct tog_view *);
757 static const struct got_error *search_next_tree_view(struct tog_view *);
758 
759 static const struct got_error *open_ref_view(struct tog_view *,
760     struct got_repository *);
761 static const struct got_error *show_ref_view(struct tog_view *);
762 static const struct got_error *input_ref_view(struct tog_view **,
763     struct tog_view *, int);
764 static const struct got_error *close_ref_view(struct tog_view *);
765 static const struct got_error *search_start_ref_view(struct tog_view *);
766 static const struct got_error *search_next_ref_view(struct tog_view *);
767 
768 static const struct got_error *open_help_view(struct tog_view *,
769     struct tog_view *);
770 static const struct got_error *show_help_view(struct tog_view *);
771 static const struct got_error *input_help_view(struct tog_view **,
772     struct tog_view *, int);
773 static const struct got_error *reset_help_view(struct tog_view *);
774 static const struct got_error* close_help_view(struct tog_view *);
775 static const struct got_error *search_start_help_view(struct tog_view *);
776 static void search_setup_help_view(struct tog_view *, FILE **, off_t **,
777     size_t *, int **, int **, int **, int **);
778 
779 static volatile sig_atomic_t tog_sigwinch_received;
780 static volatile sig_atomic_t tog_sigpipe_received;
781 static volatile sig_atomic_t tog_sigcont_received;
782 static volatile sig_atomic_t tog_sigint_received;
783 static volatile sig_atomic_t tog_sigterm_received;
784 
785 static void
786 tog_sigwinch(int signo)
787 {
788 	tog_sigwinch_received = 1;
789 }
790 
791 static void
792 tog_sigpipe(int signo)
793 {
794 	tog_sigpipe_received = 1;
795 }
796 
797 static void
798 tog_sigcont(int signo)
799 {
800 	tog_sigcont_received = 1;
801 }
802 
803 static void
804 tog_sigint(int signo)
805 {
806 	tog_sigint_received = 1;
807 }
808 
809 static void
810 tog_sigterm(int signo)
811 {
812 	tog_sigterm_received = 1;
813 }
814 
815 static int
816 tog_fatal_signal_received(void)
817 {
818 	return (tog_sigpipe_received ||
819 	    tog_sigint_received || tog_sigterm_received);
820 }
821 
822 static const struct got_error *
823 view_close(struct tog_view *view)
824 {
825 	const struct got_error *err = NULL, *child_err = NULL;
826 
827 	if (view->child) {
828 		child_err = view_close(view->child);
829 		view->child = NULL;
830 	}
831 	if (view->close)
832 		err = view->close(view);
833 	if (view->panel)
834 		del_panel(view->panel);
835 	if (view->window)
836 		delwin(view->window);
837 	free(view);
838 	return err ? err : child_err;
839 }
840 
841 static struct tog_view *
842 view_open(int nlines, int ncols, int begin_y, int begin_x,
843     enum tog_view_type type)
844 {
845 	struct tog_view *view = calloc(1, sizeof(*view));
846 
847 	if (view == NULL)
848 		return NULL;
849 
850 	view->type = type;
851 	view->lines = LINES;
852 	view->cols = COLS;
853 	view->nlines = nlines ? nlines : LINES - begin_y;
854 	view->ncols = ncols ? ncols : COLS - begin_x;
855 	view->begin_y = begin_y;
856 	view->begin_x = begin_x;
857 	view->window = newwin(nlines, ncols, begin_y, begin_x);
858 	if (view->window == NULL) {
859 		view_close(view);
860 		return NULL;
861 	}
862 	view->panel = new_panel(view->window);
863 	if (view->panel == NULL ||
864 	    set_panel_userptr(view->panel, view) != OK) {
865 		view_close(view);
866 		return NULL;
867 	}
868 
869 	keypad(view->window, TRUE);
870 	return view;
871 }
872 
873 static int
874 view_split_begin_x(int begin_x)
875 {
876 	if (begin_x > 0 || COLS < 120)
877 		return 0;
878 	return (COLS - MAX(COLS / 2, 80));
879 }
880 
881 /* XXX Stub till we decide what to do. */
882 static int
883 view_split_begin_y(int lines)
884 {
885 	return lines * HSPLIT_SCALE;
886 }
887 
888 static const struct got_error *view_resize(struct tog_view *);
889 
890 static const struct got_error *
891 view_splitscreen(struct tog_view *view)
892 {
893 	const struct got_error *err = NULL;
894 
895 	if (!view->resized && view->mode == TOG_VIEW_SPLIT_HRZN) {
896 		if (view->resized_y && view->resized_y < view->lines)
897 			view->begin_y = view->resized_y;
898 		else
899 			view->begin_y = view_split_begin_y(view->nlines);
900 		view->begin_x = 0;
901 	} else if (!view->resized) {
902 		if (view->resized_x && view->resized_x < view->cols - 1 &&
903 		    view->cols > 119)
904 			view->begin_x = view->resized_x;
905 		else
906 			view->begin_x = view_split_begin_x(0);
907 		view->begin_y = 0;
908 	}
909 	view->nlines = LINES - view->begin_y;
910 	view->ncols = COLS - view->begin_x;
911 	view->lines = LINES;
912 	view->cols = COLS;
913 	err = view_resize(view);
914 	if (err)
915 		return err;
916 
917 	if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN)
918 		view->parent->nlines = view->begin_y;
919 
920 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
921 		return got_error_from_errno("mvwin");
922 
923 	return NULL;
924 }
925 
926 static const struct got_error *
927 view_fullscreen(struct tog_view *view)
928 {
929 	const struct got_error *err = NULL;
930 
931 	view->begin_x = 0;
932 	view->begin_y = view->resized ? view->begin_y : 0;
933 	view->nlines = view->resized ? view->nlines : LINES;
934 	view->ncols = COLS;
935 	view->lines = LINES;
936 	view->cols = COLS;
937 	err = view_resize(view);
938 	if (err)
939 		return err;
940 
941 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
942 		return got_error_from_errno("mvwin");
943 
944 	return NULL;
945 }
946 
947 static int
948 view_is_parent_view(struct tog_view *view)
949 {
950 	return view->parent == NULL;
951 }
952 
953 static int
954 view_is_splitscreen(struct tog_view *view)
955 {
956 	return view->begin_x > 0 || view->begin_y > 0;
957 }
958 
959 static int
960 view_is_fullscreen(struct tog_view *view)
961 {
962 	return view->nlines == LINES && view->ncols == COLS;
963 }
964 
965 static int
966 view_is_hsplit_top(struct tog_view *view)
967 {
968 	return view->mode == TOG_VIEW_SPLIT_HRZN && view->child &&
969 	    view_is_splitscreen(view->child);
970 }
971 
972 static void
973 view_border(struct tog_view *view)
974 {
975 	PANEL *panel;
976 	const struct tog_view *view_above;
977 
978 	if (view->parent)
979 		return view_border(view->parent);
980 
981 	panel = panel_above(view->panel);
982 	if (panel == NULL)
983 		return;
984 
985 	view_above = panel_userptr(panel);
986 	if (view->mode == TOG_VIEW_SPLIT_HRZN)
987 		mvwhline(view->window, view_above->begin_y - 1,
988 		    view->begin_x, got_locale_is_utf8() ?
989 		    ACS_HLINE : '-', view->ncols);
990 	else
991 		mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
992 		    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
993 }
994 
995 static const struct got_error *view_init_hsplit(struct tog_view *, int);
996 static const struct got_error *request_log_commits(struct tog_view *);
997 static const struct got_error *offset_selection_down(struct tog_view *);
998 static void offset_selection_up(struct tog_view *);
999 static void view_get_split(struct tog_view *, int *, int *);
1000 
1001 static const struct got_error *
1002 view_resize(struct tog_view *view)
1003 {
1004 	const struct got_error	*err = NULL;
1005 	int			 dif, nlines, ncols;
1006 
1007 	dif = LINES - view->lines;  /* line difference */
1008 
1009 	if (view->lines > LINES)
1010 		nlines = view->nlines - (view->lines - LINES);
1011 	else
1012 		nlines = view->nlines + (LINES - view->lines);
1013 	if (view->cols > COLS)
1014 		ncols = view->ncols - (view->cols - COLS);
1015 	else
1016 		ncols = view->ncols + (COLS - view->cols);
1017 
1018 	if (view->child) {
1019 		int hs = view->child->begin_y;
1020 
1021 		if (!view_is_fullscreen(view))
1022 			view->child->begin_x = view_split_begin_x(view->begin_x);
1023 		if (view->mode == TOG_VIEW_SPLIT_HRZN ||
1024 		    view->child->begin_x == 0) {
1025 			ncols = COLS;
1026 
1027 			view_fullscreen(view->child);
1028 			if (view->child->focussed)
1029 				show_panel(view->child->panel);
1030 			else
1031 				show_panel(view->panel);
1032 		} else {
1033 			ncols = view->child->begin_x;
1034 
1035 			view_splitscreen(view->child);
1036 			show_panel(view->child->panel);
1037 		}
1038 		/*
1039 		 * XXX This is ugly and needs to be moved into the above
1040 		 * logic but "works" for now and my attempts at moving it
1041 		 * break either 'tab' or 'F' key maps in horizontal splits.
1042 		 */
1043 		if (hs) {
1044 			err = view_splitscreen(view->child);
1045 			if (err)
1046 				return err;
1047 			if (dif < 0) { /* top split decreased */
1048 				err = offset_selection_down(view);
1049 				if (err)
1050 					return err;
1051 			}
1052 			view_border(view);
1053 			update_panels();
1054 			doupdate();
1055 			show_panel(view->child->panel);
1056 			nlines = view->nlines;
1057 		}
1058 	} else if (view->parent == NULL)
1059 		ncols = COLS;
1060 
1061 	if (view->resize && dif > 0) {
1062 		err = view->resize(view, dif);
1063 		if (err)
1064 			return err;
1065 	}
1066 
1067 	if (wresize(view->window, nlines, ncols) == ERR)
1068 		return got_error_from_errno("wresize");
1069 	if (replace_panel(view->panel, view->window) == ERR)
1070 		return got_error_from_errno("replace_panel");
1071 	wclear(view->window);
1072 
1073 	view->nlines = nlines;
1074 	view->ncols = ncols;
1075 	view->lines = LINES;
1076 	view->cols = COLS;
1077 
1078 	return NULL;
1079 }
1080 
1081 static const struct got_error *
1082 resize_log_view(struct tog_view *view, int increase)
1083 {
1084 	struct tog_log_view_state	*s = &view->state.log;
1085 	const struct got_error		*err = NULL;
1086 	int				 n = 0;
1087 
1088 	if (s->selected_entry)
1089 		n = s->selected_entry->idx + view->lines - s->selected;
1090 
1091 	/*
1092 	 * Request commits to account for the increased
1093 	 * height so we have enough to populate the view.
1094 	 */
1095 	if (s->commits->ncommits < n) {
1096 		view->nscrolled = n - s->commits->ncommits + increase + 1;
1097 		err = request_log_commits(view);
1098 	}
1099 
1100 	return err;
1101 }
1102 
1103 static void
1104 view_adjust_offset(struct tog_view *view, int n)
1105 {
1106 	if (n == 0)
1107 		return;
1108 
1109 	if (view->parent && view->parent->offset) {
1110 		if (view->parent->offset + n >= 0)
1111 			view->parent->offset += n;
1112 		else
1113 			view->parent->offset = 0;
1114 	} else if (view->offset) {
1115 		if (view->offset - n >= 0)
1116 			view->offset -= n;
1117 		else
1118 			view->offset = 0;
1119 	}
1120 }
1121 
1122 static const struct got_error *
1123 view_resize_split(struct tog_view *view, int resize)
1124 {
1125 	const struct got_error	*err = NULL;
1126 	struct tog_view		*v = NULL;
1127 
1128 	if (view->parent)
1129 		v = view->parent;
1130 	else
1131 		v = view;
1132 
1133 	if (!v->child || !view_is_splitscreen(v->child))
1134 		return NULL;
1135 
1136 	v->resized = v->child->resized = resize;  /* lock for resize event */
1137 
1138 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
1139 		if (v->child->resized_y)
1140 			v->child->begin_y = v->child->resized_y;
1141 		if (view->parent)
1142 			v->child->begin_y -= resize;
1143 		else
1144 			v->child->begin_y += resize;
1145 		if (v->child->begin_y < 3) {
1146 			view->count = 0;
1147 			v->child->begin_y = 3;
1148 		} else if (v->child->begin_y > LINES - 1) {
1149 			view->count = 0;
1150 			v->child->begin_y = LINES - 1;
1151 		}
1152 		v->ncols = COLS;
1153 		v->child->ncols = COLS;
1154 		view_adjust_offset(view, resize);
1155 		err = view_init_hsplit(v, v->child->begin_y);
1156 		if (err)
1157 			return err;
1158 		v->child->resized_y = v->child->begin_y;
1159 	} else {
1160 		if (v->child->resized_x)
1161 			v->child->begin_x = v->child->resized_x;
1162 		if (view->parent)
1163 			v->child->begin_x -= resize;
1164 		else
1165 			v->child->begin_x += resize;
1166 		if (v->child->begin_x < 11) {
1167 			view->count = 0;
1168 			v->child->begin_x = 11;
1169 		} else if (v->child->begin_x > COLS - 1) {
1170 			view->count = 0;
1171 			v->child->begin_x = COLS - 1;
1172 		}
1173 		v->child->resized_x = v->child->begin_x;
1174 	}
1175 
1176 	v->child->mode = v->mode;
1177 	v->child->nlines = v->lines - v->child->begin_y;
1178 	v->child->ncols = v->cols - v->child->begin_x;
1179 	v->focus_child = 1;
1180 
1181 	err = view_fullscreen(v);
1182 	if (err)
1183 		return err;
1184 	err = view_splitscreen(v->child);
1185 	if (err)
1186 		return err;
1187 
1188 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1189 		err = offset_selection_down(v->child);
1190 		if (err)
1191 			return err;
1192 	}
1193 
1194 	if (v->resize)
1195 		err = v->resize(v, 0);
1196 	else if (v->child->resize)
1197 		err = v->child->resize(v->child, 0);
1198 
1199 	v->resized = v->child->resized = 0;
1200 
1201 	return err;
1202 }
1203 
1204 static void
1205 view_transfer_size(struct tog_view *dst, struct tog_view *src)
1206 {
1207 	struct tog_view *v = src->child ? src->child : src;
1208 
1209 	dst->resized_x = v->resized_x;
1210 	dst->resized_y = v->resized_y;
1211 }
1212 
1213 static const struct got_error *
1214 view_close_child(struct tog_view *view)
1215 {
1216 	const struct got_error *err = NULL;
1217 
1218 	if (view->child == NULL)
1219 		return NULL;
1220 
1221 	err = view_close(view->child);
1222 	view->child = NULL;
1223 	return err;
1224 }
1225 
1226 static const struct got_error *
1227 view_set_child(struct tog_view *view, struct tog_view *child)
1228 {
1229 	const struct got_error *err = NULL;
1230 
1231 	view->child = child;
1232 	child->parent = view;
1233 
1234 	err = view_resize(view);
1235 	if (err)
1236 		return err;
1237 
1238 	if (view->child->resized_x || view->child->resized_y)
1239 		err = view_resize_split(view, 0);
1240 
1241 	return err;
1242 }
1243 
1244 static const struct got_error *view_dispatch_request(struct tog_view **,
1245     struct tog_view *, enum tog_view_type, int, int);
1246 
1247 static const struct got_error *
1248 view_request_new(struct tog_view **requested, struct tog_view *view,
1249     enum tog_view_type request)
1250 {
1251 	struct tog_view		*new_view = NULL;
1252 	const struct got_error	*err;
1253 	int			 y = 0, x = 0;
1254 
1255 	*requested = NULL;
1256 
1257 	if (view_is_parent_view(view) && request != TOG_VIEW_HELP)
1258 		view_get_split(view, &y, &x);
1259 
1260 	err = view_dispatch_request(&new_view, view, request, y, x);
1261 	if (err)
1262 		return err;
1263 
1264 	if (view_is_parent_view(view) && view->mode == TOG_VIEW_SPLIT_HRZN &&
1265 	    request != TOG_VIEW_HELP) {
1266 		err = view_init_hsplit(view, y);
1267 		if (err)
1268 			return err;
1269 	}
1270 
1271 	view->focussed = 0;
1272 	new_view->focussed = 1;
1273 	new_view->mode = view->mode;
1274 	new_view->nlines = request == TOG_VIEW_HELP ?
1275 	    view->lines : view->lines - y;
1276 
1277 	if (view_is_parent_view(view) && request != TOG_VIEW_HELP) {
1278 		view_transfer_size(new_view, view);
1279 		err = view_close_child(view);
1280 		if (err)
1281 			return err;
1282 		err = view_set_child(view, new_view);
1283 		if (err)
1284 			return err;
1285 		view->focus_child = 1;
1286 	} else
1287 		*requested = new_view;
1288 
1289 	return NULL;
1290 }
1291 
1292 static void
1293 tog_resizeterm(void)
1294 {
1295 	int cols, lines;
1296 	struct winsize size;
1297 
1298 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
1299 		cols = 80;     /* Default */
1300 		lines = 24;
1301 	} else {
1302 		cols = size.ws_col;
1303 		lines = size.ws_row;
1304 	}
1305 	resize_term(lines, cols);
1306 }
1307 
1308 static const struct got_error *
1309 view_search_start(struct tog_view *view, int fast_refresh)
1310 {
1311 	const struct got_error *err = NULL;
1312 	struct tog_view *v = view;
1313 	char pattern[1024];
1314 	int ret;
1315 
1316 	if (view->search_started) {
1317 		regfree(&view->regex);
1318 		view->searching = 0;
1319 		memset(&view->regmatch, 0, sizeof(view->regmatch));
1320 	}
1321 	view->search_started = 0;
1322 
1323 	if (view->nlines < 1)
1324 		return NULL;
1325 
1326 	if (view_is_hsplit_top(view))
1327 		v = view->child;
1328 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1329 		v = view->parent;
1330 
1331 	mvwaddstr(v->window, v->nlines - 1, 0, "/");
1332 	wclrtoeol(v->window);
1333 
1334 	nodelay(v->window, FALSE);  /* block for search term input */
1335 	nocbreak();
1336 	echo();
1337 	ret = wgetnstr(v->window, pattern, sizeof(pattern));
1338 	wrefresh(v->window);
1339 	cbreak();
1340 	noecho();
1341 	nodelay(v->window, TRUE);
1342 	if (!fast_refresh && !using_mock_io)
1343 		halfdelay(10);
1344 	if (ret == ERR)
1345 		return NULL;
1346 
1347 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
1348 		err = view->search_start(view);
1349 		if (err) {
1350 			regfree(&view->regex);
1351 			return err;
1352 		}
1353 		view->search_started = 1;
1354 		view->searching = TOG_SEARCH_FORWARD;
1355 		view->search_next_done = 0;
1356 		view->search_next(view);
1357 	}
1358 
1359 	return NULL;
1360 }
1361 
1362 /* Switch split mode. If view is a parent or child, draw the new splitscreen. */
1363 static const struct got_error *
1364 switch_split(struct tog_view *view)
1365 {
1366 	const struct got_error	*err = NULL;
1367 	struct tog_view		*v = NULL;
1368 
1369 	if (view->parent)
1370 		v = view->parent;
1371 	else
1372 		v = view;
1373 
1374 	if (v->mode == TOG_VIEW_SPLIT_HRZN)
1375 		v->mode = TOG_VIEW_SPLIT_VERT;
1376 	else
1377 		v->mode = TOG_VIEW_SPLIT_HRZN;
1378 
1379 	if (!v->child)
1380 		return NULL;
1381 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->cols < 120)
1382 		v->mode = TOG_VIEW_SPLIT_NONE;
1383 
1384 	view_get_split(v, &v->child->begin_y, &v->child->begin_x);
1385 	if (v->mode == TOG_VIEW_SPLIT_HRZN && v->child->resized_y)
1386 		v->child->begin_y = v->child->resized_y;
1387 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->child->resized_x)
1388 		v->child->begin_x = v->child->resized_x;
1389 
1390 
1391 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1392 		v->ncols = COLS;
1393 		v->child->ncols = COLS;
1394 		v->child->nscrolled = LINES - v->child->nlines;
1395 
1396 		err = view_init_hsplit(v, v->child->begin_y);
1397 		if (err)
1398 			return err;
1399 	}
1400 	v->child->mode = v->mode;
1401 	v->child->nlines = v->lines - v->child->begin_y;
1402 	v->focus_child = 1;
1403 
1404 	err = view_fullscreen(v);
1405 	if (err)
1406 		return err;
1407 	err = view_splitscreen(v->child);
1408 	if (err)
1409 		return err;
1410 
1411 	if (v->mode == TOG_VIEW_SPLIT_NONE)
1412 		v->mode = TOG_VIEW_SPLIT_VERT;
1413 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1414 		err = offset_selection_down(v);
1415 		if (err)
1416 			return err;
1417 		err = offset_selection_down(v->child);
1418 		if (err)
1419 			return err;
1420 	} else {
1421 		offset_selection_up(v);
1422 		offset_selection_up(v->child);
1423 	}
1424 	if (v->resize)
1425 		err = v->resize(v, 0);
1426 	else if (v->child->resize)
1427 		err = v->child->resize(v->child, 0);
1428 
1429 	return err;
1430 }
1431 
1432 /*
1433  * Strip trailing whitespace from str starting at byte *n;
1434  * if *n < 0, use strlen(str). Return new str length in *n.
1435  */
1436 static void
1437 strip_trailing_ws(char *str, int *n)
1438 {
1439 	size_t x = *n;
1440 
1441 	if (str == NULL || *str == '\0')
1442 		return;
1443 
1444 	if (x < 0)
1445 		x = strlen(str);
1446 
1447 	while (x-- > 0 && isspace((unsigned char)str[x]))
1448 		str[x] = '\0';
1449 
1450 	*n = x + 1;
1451 }
1452 
1453 /*
1454  * Extract visible substring of line y from the curses screen
1455  * and strip trailing whitespace. If vline is set and locale is
1456  * UTF-8, overwrite line[vline] with '|' because the ACS_VLINE
1457  * character is written out as 'x'. Write the line to file f.
1458  */
1459 static const struct got_error *
1460 view_write_line(FILE *f, int y, int vline)
1461 {
1462 	char	line[COLS * MB_LEN_MAX];  /* allow for multibyte chars */
1463 	int	r, w;
1464 
1465 	r = mvwinnstr(curscr, y, 0, line, sizeof(line));
1466 	if (r == ERR)
1467 		return got_error_fmt(GOT_ERR_RANGE,
1468 		    "failed to extract line %d", y);
1469 
1470 	/*
1471 	 * In some views, lines are padded with blanks to COLS width.
1472 	 * Strip them so we can diff without the -b flag when testing.
1473 	 */
1474 	strip_trailing_ws(line, &r);
1475 
1476 	if (vline > 0 && got_locale_is_utf8())
1477 		line[vline] = '|';
1478 
1479 	w = fprintf(f, "%s\n", line);
1480 	if (w != r + 1)		/* \n */
1481 		return got_ferror(f, GOT_ERR_IO);
1482 
1483 	return NULL;
1484 }
1485 
1486 /*
1487  * Capture the visible curses screen by writing each line to the
1488  * file at the path set via the TOG_SCR_DUMP environment variable.
1489  */
1490 static const struct got_error *
1491 screendump(struct tog_view *view)
1492 {
1493 	const struct got_error	*err;
1494 	FILE			*f = NULL;
1495 	const char		*path;
1496 	int			 i;
1497 
1498 	path = getenv("TOG_SCR_DUMP");
1499 	if (path == NULL || *path == '\0')
1500 		return got_error_msg(GOT_ERR_BAD_PATH,
1501 		    "TOG_SCR_DUMP path not set to capture screen dump");
1502 	f = fopen(path, "wex");
1503 	if (f == NULL)
1504 		return got_error_from_errno_fmt("fopen: %s", path);
1505 
1506 	if ((view->child && view->child->begin_x) ||
1507 	    (view->parent && view->begin_x)) {
1508 		int ncols = view->child ? view->ncols : view->parent->ncols;
1509 
1510 		/* vertical splitscreen */
1511 		for (i = 0; i < view->nlines; ++i) {
1512 			err = view_write_line(f, i, ncols - 1);
1513 			if (err)
1514 				goto done;
1515 		}
1516 	} else {
1517 		int hline = 0;
1518 
1519 		/* fullscreen or horizontal splitscreen */
1520 		if ((view->child && view->child->begin_y) ||
1521 		    (view->parent && view->begin_y))	/* hsplit */
1522 			hline = view->child ?
1523 			    view->child->begin_y : view->begin_y;
1524 
1525 		for (i = 0; i < view->lines; i++) {
1526 			if (hline && got_locale_is_utf8() && i == hline - 1) {
1527 				int c;
1528 
1529 				/* ACS_HLINE writes out as 'q', overwrite it */
1530 				for (c = 0; c < view->cols; ++c)
1531 					fputc('-', f);
1532 				fputc('\n', f);
1533 				continue;
1534 			}
1535 
1536 			err = view_write_line(f, i, 0);
1537 			if (err)
1538 				goto done;
1539 		}
1540 	}
1541 
1542 done:
1543 	if (f && fclose(f) == EOF && err == NULL)
1544 		err = got_ferror(f, GOT_ERR_IO);
1545 	return err;
1546 }
1547 
1548 /*
1549  * Compute view->count from numeric input. Assign total to view->count and
1550  * return first non-numeric key entered.
1551  */
1552 static int
1553 get_compound_key(struct tog_view *view, int c)
1554 {
1555 	struct tog_view	*v = view;
1556 	int		 x, n = 0;
1557 
1558 	if (view_is_hsplit_top(view))
1559 		v = view->child;
1560 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1561 		v = view->parent;
1562 
1563 	view->count = 0;
1564 	cbreak();  /* block for input */
1565 	nodelay(view->window, FALSE);
1566 	wmove(v->window, v->nlines - 1, 0);
1567 	wclrtoeol(v->window);
1568 	waddch(v->window, ':');
1569 
1570 	do {
1571 		x = getcurx(v->window);
1572 		if (x != ERR && x < view->ncols) {
1573 			waddch(v->window, c);
1574 			wrefresh(v->window);
1575 		}
1576 
1577 		/*
1578 		 * Don't overflow. Max valid request should be the greatest
1579 		 * between the longest and total lines; cap at 10 million.
1580 		 */
1581 		if (n >= 9999999)
1582 			n = 9999999;
1583 		else
1584 			n = n * 10 + (c - '0');
1585 	} while (((c = wgetch(view->window))) >= '0' && c <= '9' && c != ERR);
1586 
1587 	if (c == 'G' || c == 'g') {	/* nG key map */
1588 		view->gline = view->hiline = n;
1589 		n = 0;
1590 		c = 0;
1591 	}
1592 
1593 	/* Massage excessive or inapplicable values at the input handler. */
1594 	view->count = n;
1595 
1596 	return c;
1597 }
1598 
1599 static void
1600 action_report(struct tog_view *view)
1601 {
1602 	struct tog_view *v = view;
1603 
1604 	if (view_is_hsplit_top(view))
1605 		v = view->child;
1606 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1607 		v = view->parent;
1608 
1609 	wmove(v->window, v->nlines - 1, 0);
1610 	wclrtoeol(v->window);
1611 	wprintw(v->window, ":%s", view->action);
1612 	wrefresh(v->window);
1613 
1614 	/*
1615 	 * Clear action status report. Only clear in blame view
1616 	 * once annotating is complete, otherwise it's too fast.
1617 	 */
1618 	if (view->type == TOG_VIEW_BLAME) {
1619 		if (view->state.blame.blame_complete)
1620 			view->action = NULL;
1621 	} else
1622 		view->action = NULL;
1623 }
1624 
1625 /*
1626  * Read the next line from the test script and assign
1627  * key instruction to *ch. If at EOF, set the *done flag.
1628  */
1629 static const struct got_error *
1630 tog_read_script_key(FILE *script, int *ch, int *done)
1631 {
1632 	const struct got_error	*err = NULL;
1633 	char			*line = NULL;
1634 	size_t			 linesz = 0;
1635 
1636 	if (getline(&line, &linesz, script) == -1) {
1637 		if (feof(script)) {
1638 			*done = 1;
1639 			goto done;
1640 		} else {
1641 			err = got_ferror(script, GOT_ERR_IO);
1642 			goto done;
1643 		}
1644 	} else if (strncasecmp(line, "KEY_ENTER", 9) == 0)
1645 		*ch = KEY_ENTER;
1646 	else if (strncasecmp(line, "KEY_RIGHT", 9) == 0)
1647 		*ch = KEY_RIGHT;
1648 	else if (strncasecmp(line, "KEY_LEFT", 8) == 0)
1649 		*ch = KEY_LEFT;
1650 	else if (strncasecmp(line, "KEY_DOWN", 8) == 0)
1651 		*ch = KEY_DOWN;
1652 	else if (strncasecmp(line, "KEY_UP", 6) == 0)
1653 		*ch = KEY_UP;
1654 	else if (strncasecmp(line, TOG_SCREEN_DUMP, TOG_SCREEN_DUMP_LEN) == 0)
1655 		*ch = TOG_KEY_SCRDUMP;
1656 	else
1657 		*ch = *line;
1658 
1659 done:
1660 	free(line);
1661 	return err;
1662 }
1663 
1664 static const struct got_error *
1665 view_input(struct tog_view **new, int *done, struct tog_view *view,
1666     struct tog_view_list_head *views, int fast_refresh)
1667 {
1668 	const struct got_error *err = NULL;
1669 	struct tog_view *v;
1670 	int ch, errcode;
1671 
1672 	*new = NULL;
1673 
1674 	if (view->action)
1675 		action_report(view);
1676 
1677 	/* Clear "no matches" indicator. */
1678 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
1679 	    view->search_next_done == TOG_SEARCH_HAVE_NONE) {
1680 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
1681 		view->count = 0;
1682 	}
1683 
1684 	if (view->searching && !view->search_next_done) {
1685 		errcode = pthread_mutex_unlock(&tog_mutex);
1686 		if (errcode)
1687 			return got_error_set_errno(errcode,
1688 			    "pthread_mutex_unlock");
1689 		sched_yield();
1690 		errcode = pthread_mutex_lock(&tog_mutex);
1691 		if (errcode)
1692 			return got_error_set_errno(errcode,
1693 			    "pthread_mutex_lock");
1694 		view->search_next(view);
1695 		return NULL;
1696 	}
1697 
1698 	/* Allow threads to make progress while we are waiting for input. */
1699 	errcode = pthread_mutex_unlock(&tog_mutex);
1700 	if (errcode)
1701 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
1702 
1703 	if (using_mock_io) {
1704 		err = tog_read_script_key(tog_io.f, &ch, done);
1705 		if (err)
1706 			return err;
1707 	} else if (view->count && --view->count) {
1708 		cbreak();
1709 		nodelay(view->window, TRUE);
1710 		ch = wgetch(view->window);
1711 		/* let C-g or backspace abort unfinished count */
1712 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
1713 			view->count = 0;
1714 		else
1715 			ch = view->ch;
1716 	} else {
1717 		ch = wgetch(view->window);
1718 		if (ch >= '1' && ch  <= '9')
1719 			view->ch = ch = get_compound_key(view, ch);
1720 	}
1721 	if (view->hiline && ch != ERR && ch != 0)
1722 		view->hiline = 0;  /* key pressed, clear line highlight */
1723 	nodelay(view->window, TRUE);
1724 	errcode = pthread_mutex_lock(&tog_mutex);
1725 	if (errcode)
1726 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1727 
1728 	if (tog_sigwinch_received || tog_sigcont_received) {
1729 		tog_resizeterm();
1730 		tog_sigwinch_received = 0;
1731 		tog_sigcont_received = 0;
1732 		TAILQ_FOREACH(v, views, entry) {
1733 			err = view_resize(v);
1734 			if (err)
1735 				return err;
1736 			err = v->input(new, v, KEY_RESIZE);
1737 			if (err)
1738 				return err;
1739 			if (v->child) {
1740 				err = view_resize(v->child);
1741 				if (err)
1742 					return err;
1743 				err = v->child->input(new, v->child,
1744 				    KEY_RESIZE);
1745 				if (err)
1746 					return err;
1747 				if (v->child->resized_x || v->child->resized_y) {
1748 					err = view_resize_split(v, 0);
1749 					if (err)
1750 						return err;
1751 				}
1752 			}
1753 		}
1754 	}
1755 
1756 	switch (ch) {
1757 	case '?':
1758 	case 'H':
1759 	case KEY_F(1):
1760 		if (view->type == TOG_VIEW_HELP)
1761 			err = view->reset(view);
1762 		else
1763 			err = view_request_new(new, view, TOG_VIEW_HELP);
1764 		break;
1765 	case '\t':
1766 		view->count = 0;
1767 		if (view->child) {
1768 			view->focussed = 0;
1769 			view->child->focussed = 1;
1770 			view->focus_child = 1;
1771 		} else if (view->parent) {
1772 			view->focussed = 0;
1773 			view->parent->focussed = 1;
1774 			view->parent->focus_child = 0;
1775 			if (!view_is_splitscreen(view)) {
1776 				if (view->parent->resize) {
1777 					err = view->parent->resize(view->parent,
1778 					    0);
1779 					if (err)
1780 						return err;
1781 				}
1782 				offset_selection_up(view->parent);
1783 				err = view_fullscreen(view->parent);
1784 				if (err)
1785 					return err;
1786 			}
1787 		}
1788 		break;
1789 	case 'q':
1790 		if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN) {
1791 			if (view->parent->resize) {
1792 				/* might need more commits to fill fullscreen */
1793 				err = view->parent->resize(view->parent, 0);
1794 				if (err)
1795 					break;
1796 			}
1797 			offset_selection_up(view->parent);
1798 		}
1799 		err = view->input(new, view, ch);
1800 		view->dying = 1;
1801 		break;
1802 	case 'Q':
1803 		*done = 1;
1804 		break;
1805 	case 'F':
1806 		view->count = 0;
1807 		if (view_is_parent_view(view)) {
1808 			if (view->child == NULL)
1809 				break;
1810 			if (view_is_splitscreen(view->child)) {
1811 				view->focussed = 0;
1812 				view->child->focussed = 1;
1813 				err = view_fullscreen(view->child);
1814 			} else {
1815 				err = view_splitscreen(view->child);
1816 				if (!err)
1817 					err = view_resize_split(view, 0);
1818 			}
1819 			if (err)
1820 				break;
1821 			err = view->child->input(new, view->child,
1822 			    KEY_RESIZE);
1823 		} else {
1824 			if (view_is_splitscreen(view)) {
1825 				view->parent->focussed = 0;
1826 				view->focussed = 1;
1827 				err = view_fullscreen(view);
1828 			} else {
1829 				err = view_splitscreen(view);
1830 				if (!err && view->mode != TOG_VIEW_SPLIT_HRZN)
1831 					err = view_resize(view->parent);
1832 				if (!err)
1833 					err = view_resize_split(view, 0);
1834 			}
1835 			if (err)
1836 				break;
1837 			err = view->input(new, view, KEY_RESIZE);
1838 		}
1839 		if (err)
1840 			break;
1841 		if (view->resize) {
1842 			err = view->resize(view, 0);
1843 			if (err)
1844 				break;
1845 		}
1846 		if (view->parent)
1847 			err = offset_selection_down(view->parent);
1848 		if (!err)
1849 			err = offset_selection_down(view);
1850 		break;
1851 	case 'S':
1852 		view->count = 0;
1853 		err = switch_split(view);
1854 		break;
1855 	case '-':
1856 		err = view_resize_split(view, -1);
1857 		break;
1858 	case '+':
1859 		err = view_resize_split(view, 1);
1860 		break;
1861 	case KEY_RESIZE:
1862 		break;
1863 	case '/':
1864 		view->count = 0;
1865 		if (view->search_start)
1866 			view_search_start(view, fast_refresh);
1867 		else
1868 			err = view->input(new, view, ch);
1869 		break;
1870 	case 'N':
1871 	case 'n':
1872 		if (view->search_started && view->search_next) {
1873 			view->searching = (ch == 'n' ?
1874 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1875 			view->search_next_done = 0;
1876 			view->search_next(view);
1877 		} else
1878 			err = view->input(new, view, ch);
1879 		break;
1880 	case 'A':
1881 		if (tog_diff_algo == GOT_DIFF_ALGORITHM_MYERS) {
1882 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
1883 			view->action = "Patience diff algorithm";
1884 		} else {
1885 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
1886 			view->action = "Myers diff algorithm";
1887 		}
1888 		TAILQ_FOREACH(v, views, entry) {
1889 			if (v->reset) {
1890 				err = v->reset(v);
1891 				if (err)
1892 					return err;
1893 			}
1894 			if (v->child && v->child->reset) {
1895 				err = v->child->reset(v->child);
1896 				if (err)
1897 					return err;
1898 			}
1899 		}
1900 		break;
1901 	case TOG_KEY_SCRDUMP:
1902 		err = screendump(view);
1903 		break;
1904 	default:
1905 		err = view->input(new, view, ch);
1906 		break;
1907 	}
1908 
1909 	return err;
1910 }
1911 
1912 static int
1913 view_needs_focus_indication(struct tog_view *view)
1914 {
1915 	if (view_is_parent_view(view)) {
1916 		if (view->child == NULL || view->child->focussed)
1917 			return 0;
1918 		if (!view_is_splitscreen(view->child))
1919 			return 0;
1920 	} else if (!view_is_splitscreen(view))
1921 		return 0;
1922 
1923 	return view->focussed;
1924 }
1925 
1926 static const struct got_error *
1927 tog_io_close(void)
1928 {
1929 	const struct got_error *err = NULL;
1930 
1931 	if (tog_io.cin && fclose(tog_io.cin) == EOF)
1932 		err = got_ferror(tog_io.cin, GOT_ERR_IO);
1933 	if (tog_io.cout && fclose(tog_io.cout) == EOF && err == NULL)
1934 		err = got_ferror(tog_io.cout, GOT_ERR_IO);
1935 	if (tog_io.f && fclose(tog_io.f) == EOF && err == NULL)
1936 		err = got_ferror(tog_io.f, GOT_ERR_IO);
1937 
1938 	return err;
1939 }
1940 
1941 static const struct got_error *
1942 view_loop(struct tog_view *view)
1943 {
1944 	const struct got_error *err = NULL;
1945 	struct tog_view_list_head views;
1946 	struct tog_view *new_view;
1947 	char *mode;
1948 	int fast_refresh = 10;
1949 	int done = 0, errcode;
1950 
1951 	mode = getenv("TOG_VIEW_SPLIT_MODE");
1952 	if (!mode || !(*mode == 'h' || *mode == 'H'))
1953 		view->mode = TOG_VIEW_SPLIT_VERT;
1954 	else
1955 		view->mode = TOG_VIEW_SPLIT_HRZN;
1956 
1957 	errcode = pthread_mutex_lock(&tog_mutex);
1958 	if (errcode)
1959 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1960 
1961 	TAILQ_INIT(&views);
1962 	TAILQ_INSERT_HEAD(&views, view, entry);
1963 
1964 	view->focussed = 1;
1965 	err = view->show(view);
1966 	if (err)
1967 		return err;
1968 	update_panels();
1969 	doupdate();
1970 	while (!TAILQ_EMPTY(&views) && !done && !tog_thread_error &&
1971 	    !tog_fatal_signal_received()) {
1972 		/* Refresh fast during initialization, then become slower. */
1973 		if (fast_refresh && --fast_refresh == 0 && !using_mock_io)
1974 			halfdelay(10); /* switch to once per second */
1975 
1976 		err = view_input(&new_view, &done, view, &views, fast_refresh);
1977 		if (err)
1978 			break;
1979 
1980 		if (view->dying && view == TAILQ_FIRST(&views) &&
1981 		    TAILQ_NEXT(view, entry) == NULL)
1982 			done = 1;
1983 		if (done) {
1984 			struct tog_view *v;
1985 
1986 			/*
1987 			 * When we quit, scroll the screen up a single line
1988 			 * so we don't lose any information.
1989 			 */
1990 			TAILQ_FOREACH(v, &views, entry) {
1991 				wmove(v->window, 0, 0);
1992 				wdeleteln(v->window);
1993 				wnoutrefresh(v->window);
1994 				if (v->child && !view_is_fullscreen(v)) {
1995 					wmove(v->child->window, 0, 0);
1996 					wdeleteln(v->child->window);
1997 					wnoutrefresh(v->child->window);
1998 				}
1999 			}
2000 			doupdate();
2001 		}
2002 
2003 		if (view->dying) {
2004 			struct tog_view *v, *prev = NULL;
2005 
2006 			if (view_is_parent_view(view))
2007 				prev = TAILQ_PREV(view, tog_view_list_head,
2008 				    entry);
2009 			else if (view->parent)
2010 				prev = view->parent;
2011 
2012 			if (view->parent) {
2013 				view->parent->child = NULL;
2014 				view->parent->focus_child = 0;
2015 				/* Restore fullscreen line height. */
2016 				view->parent->nlines = view->parent->lines;
2017 				err = view_resize(view->parent);
2018 				if (err)
2019 					break;
2020 				/* Make resized splits persist. */
2021 				view_transfer_size(view->parent, view);
2022 			} else
2023 				TAILQ_REMOVE(&views, view, entry);
2024 
2025 			err = view_close(view);
2026 			if (err)
2027 				goto done;
2028 
2029 			view = NULL;
2030 			TAILQ_FOREACH(v, &views, entry) {
2031 				if (v->focussed)
2032 					break;
2033 			}
2034 			if (view == NULL && new_view == NULL) {
2035 				/* No view has focus. Try to pick one. */
2036 				if (prev)
2037 					view = prev;
2038 				else if (!TAILQ_EMPTY(&views)) {
2039 					view = TAILQ_LAST(&views,
2040 					    tog_view_list_head);
2041 				}
2042 				if (view) {
2043 					if (view->focus_child) {
2044 						view->child->focussed = 1;
2045 						view = view->child;
2046 					} else
2047 						view->focussed = 1;
2048 				}
2049 			}
2050 		}
2051 		if (new_view) {
2052 			struct tog_view *v, *t;
2053 			/* Only allow one parent view per type. */
2054 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
2055 				if (v->type != new_view->type)
2056 					continue;
2057 				TAILQ_REMOVE(&views, v, entry);
2058 				err = view_close(v);
2059 				if (err)
2060 					goto done;
2061 				break;
2062 			}
2063 			TAILQ_INSERT_TAIL(&views, new_view, entry);
2064 			view = new_view;
2065 		}
2066 		if (view && !done) {
2067 			if (view_is_parent_view(view)) {
2068 				if (view->child && view->child->focussed)
2069 					view = view->child;
2070 			} else {
2071 				if (view->parent && view->parent->focussed)
2072 					view = view->parent;
2073 			}
2074 			show_panel(view->panel);
2075 			if (view->child && view_is_splitscreen(view->child))
2076 				show_panel(view->child->panel);
2077 			if (view->parent && view_is_splitscreen(view)) {
2078 				err = view->parent->show(view->parent);
2079 				if (err)
2080 					goto done;
2081 			}
2082 			err = view->show(view);
2083 			if (err)
2084 				goto done;
2085 			if (view->child) {
2086 				err = view->child->show(view->child);
2087 				if (err)
2088 					goto done;
2089 			}
2090 			update_panels();
2091 			doupdate();
2092 		}
2093 	}
2094 done:
2095 	while (!TAILQ_EMPTY(&views)) {
2096 		const struct got_error *close_err;
2097 		view = TAILQ_FIRST(&views);
2098 		TAILQ_REMOVE(&views, view, entry);
2099 		close_err = view_close(view);
2100 		if (close_err && err == NULL)
2101 			err = close_err;
2102 	}
2103 
2104 	errcode = pthread_mutex_unlock(&tog_mutex);
2105 	if (errcode && err == NULL)
2106 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
2107 
2108 	return err;
2109 }
2110 
2111 __dead static void
2112 usage_log(void)
2113 {
2114 	endwin();
2115 	fprintf(stderr,
2116 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
2117 	    getprogname());
2118 	exit(1);
2119 }
2120 
2121 /* Create newly allocated wide-character string equivalent to a byte string. */
2122 static const struct got_error *
2123 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
2124 {
2125 	char *vis = NULL;
2126 	const struct got_error *err = NULL;
2127 
2128 	*ws = NULL;
2129 	*wlen = mbstowcs(NULL, s, 0);
2130 	if (*wlen == (size_t)-1) {
2131 		int vislen;
2132 		if (errno != EILSEQ)
2133 			return got_error_from_errno("mbstowcs");
2134 
2135 		/* byte string invalid in current encoding; try to "fix" it */
2136 		err = got_mbsavis(&vis, &vislen, s);
2137 		if (err)
2138 			return err;
2139 		*wlen = mbstowcs(NULL, vis, 0);
2140 		if (*wlen == (size_t)-1) {
2141 			err = got_error_from_errno("mbstowcs"); /* give up */
2142 			goto done;
2143 		}
2144 	}
2145 
2146 	*ws = calloc(*wlen + 1, sizeof(**ws));
2147 	if (*ws == NULL) {
2148 		err = got_error_from_errno("calloc");
2149 		goto done;
2150 	}
2151 
2152 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
2153 		err = got_error_from_errno("mbstowcs");
2154 done:
2155 	free(vis);
2156 	if (err) {
2157 		free(*ws);
2158 		*ws = NULL;
2159 		*wlen = 0;
2160 	}
2161 	return err;
2162 }
2163 
2164 static const struct got_error *
2165 expand_tab(char **ptr, const char *src)
2166 {
2167 	char	*dst;
2168 	size_t	 len, n, idx = 0, sz = 0;
2169 
2170 	*ptr = NULL;
2171 	n = len = strlen(src);
2172 	dst = malloc(n + 1);
2173 	if (dst == NULL)
2174 		return got_error_from_errno("malloc");
2175 
2176 	while (idx < len && src[idx]) {
2177 		const char c = src[idx];
2178 
2179 		if (c == '\t') {
2180 			size_t nb = TABSIZE - sz % TABSIZE;
2181 			char *p;
2182 
2183 			p = realloc(dst, n + nb);
2184 			if (p == NULL) {
2185 				free(dst);
2186 				return got_error_from_errno("realloc");
2187 
2188 			}
2189 			dst = p;
2190 			n += nb;
2191 			memset(dst + sz, ' ', nb);
2192 			sz += nb;
2193 		} else
2194 			dst[sz++] = src[idx];
2195 		++idx;
2196 	}
2197 
2198 	dst[sz] = '\0';
2199 	*ptr = dst;
2200 	return NULL;
2201 }
2202 
2203 /*
2204  * Advance at most n columns from wline starting at offset off.
2205  * Return the index to the first character after the span operation.
2206  * Return the combined column width of all spanned wide character in
2207  * *rcol.
2208  */
2209 static int
2210 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
2211 {
2212 	int width, i, cols = 0;
2213 
2214 	if (n == 0) {
2215 		*rcol = cols;
2216 		return off;
2217 	}
2218 
2219 	for (i = off; wline[i] != L'\0'; ++i) {
2220 		if (wline[i] == L'\t')
2221 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
2222 		else
2223 			width = wcwidth(wline[i]);
2224 
2225 		if (width == -1) {
2226 			width = 1;
2227 			wline[i] = L'.';
2228 		}
2229 
2230 		if (cols + width > n)
2231 			break;
2232 		cols += width;
2233 	}
2234 
2235 	*rcol = cols;
2236 	return i;
2237 }
2238 
2239 /*
2240  * Format a line for display, ensuring that it won't overflow a width limit.
2241  * With scrolling, the width returned refers to the scrolled version of the
2242  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
2243  */
2244 static const struct got_error *
2245 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
2246     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
2247 {
2248 	const struct got_error *err = NULL;
2249 	int cols;
2250 	wchar_t *wline = NULL;
2251 	char *exstr = NULL;
2252 	size_t wlen;
2253 	int i, scrollx;
2254 
2255 	*wlinep = NULL;
2256 	*widthp = 0;
2257 
2258 	if (expand) {
2259 		err = expand_tab(&exstr, line);
2260 		if (err)
2261 			return err;
2262 	}
2263 
2264 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
2265 	free(exstr);
2266 	if (err)
2267 		return err;
2268 
2269 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
2270 
2271 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
2272 		wline[wlen - 1] = L'\0';
2273 		wlen--;
2274 	}
2275 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
2276 		wline[wlen - 1] = L'\0';
2277 		wlen--;
2278 	}
2279 
2280 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
2281 	wline[i] = L'\0';
2282 
2283 	if (widthp)
2284 		*widthp = cols;
2285 	if (scrollxp)
2286 		*scrollxp = scrollx;
2287 	if (err)
2288 		free(wline);
2289 	else
2290 		*wlinep = wline;
2291 	return err;
2292 }
2293 
2294 static const struct got_error*
2295 build_refs_str(char **refs_str, struct got_reflist_head *refs,
2296     struct got_object_id *id, struct got_repository *repo)
2297 {
2298 	static const struct got_error *err = NULL;
2299 	struct got_reflist_entry *re;
2300 	char *s;
2301 	const char *name;
2302 
2303 	*refs_str = NULL;
2304 
2305 	TAILQ_FOREACH(re, refs, entry) {
2306 		struct got_tag_object *tag = NULL;
2307 		struct got_object_id *ref_id;
2308 		int cmp;
2309 
2310 		name = got_ref_get_name(re->ref);
2311 		if (strcmp(name, GOT_REF_HEAD) == 0)
2312 			continue;
2313 		if (strncmp(name, "refs/", 5) == 0)
2314 			name += 5;
2315 		if (strncmp(name, "got/", 4) == 0 &&
2316 		    strncmp(name, "got/backup/", 11) != 0)
2317 			continue;
2318 		if (strncmp(name, "heads/", 6) == 0)
2319 			name += 6;
2320 		if (strncmp(name, "remotes/", 8) == 0) {
2321 			name += 8;
2322 			s = strstr(name, "/" GOT_REF_HEAD);
2323 			if (s != NULL && s[strlen(s)] == '\0')
2324 				continue;
2325 		}
2326 		err = got_ref_resolve(&ref_id, repo, re->ref);
2327 		if (err)
2328 			break;
2329 		if (strncmp(name, "tags/", 5) == 0) {
2330 			err = got_object_open_as_tag(&tag, repo, ref_id);
2331 			if (err) {
2332 				if (err->code != GOT_ERR_OBJ_TYPE) {
2333 					free(ref_id);
2334 					break;
2335 				}
2336 				/* Ref points at something other than a tag. */
2337 				err = NULL;
2338 				tag = NULL;
2339 			}
2340 		}
2341 		cmp = got_object_id_cmp(tag ?
2342 		    got_object_tag_get_object_id(tag) : ref_id, id);
2343 		free(ref_id);
2344 		if (tag)
2345 			got_object_tag_close(tag);
2346 		if (cmp != 0)
2347 			continue;
2348 		s = *refs_str;
2349 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
2350 		    s ? ", " : "", name) == -1) {
2351 			err = got_error_from_errno("asprintf");
2352 			free(s);
2353 			*refs_str = NULL;
2354 			break;
2355 		}
2356 		free(s);
2357 	}
2358 
2359 	return err;
2360 }
2361 
2362 static const struct got_error *
2363 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
2364     int col_tab_align)
2365 {
2366 	char *smallerthan;
2367 
2368 	smallerthan = strchr(author, '<');
2369 	if (smallerthan && smallerthan[1] != '\0')
2370 		author = smallerthan + 1;
2371 	author[strcspn(author, "@>")] = '\0';
2372 	return format_line(wauthor, author_width, NULL, author, 0, limit,
2373 	    col_tab_align, 0);
2374 }
2375 
2376 static const struct got_error *
2377 draw_commit(struct tog_view *view, struct got_commit_object *commit,
2378     struct got_object_id *id, const size_t date_display_cols,
2379     int author_display_cols)
2380 {
2381 	struct tog_log_view_state *s = &view->state.log;
2382 	const struct got_error *err = NULL;
2383 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
2384 	char *logmsg0 = NULL, *logmsg = NULL;
2385 	char *author = NULL;
2386 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
2387 	int author_width, logmsg_width;
2388 	char *newline, *line = NULL;
2389 	int col, limit, scrollx;
2390 	const int avail = view->ncols;
2391 	struct tm tm;
2392 	time_t committer_time;
2393 	struct tog_color *tc;
2394 
2395 	committer_time = got_object_commit_get_committer_time(commit);
2396 	if (gmtime_r(&committer_time, &tm) == NULL)
2397 		return got_error_from_errno("gmtime_r");
2398 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
2399 		return got_error(GOT_ERR_NO_SPACE);
2400 
2401 	if (avail <= date_display_cols)
2402 		limit = MIN(sizeof(datebuf) - 1, avail);
2403 	else
2404 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
2405 	tc = get_color(&s->colors, TOG_COLOR_DATE);
2406 	if (tc)
2407 		wattr_on(view->window,
2408 		    COLOR_PAIR(tc->colorpair), NULL);
2409 	waddnstr(view->window, datebuf, limit);
2410 	if (tc)
2411 		wattr_off(view->window,
2412 		    COLOR_PAIR(tc->colorpair), NULL);
2413 	col = limit;
2414 	if (col > avail)
2415 		goto done;
2416 
2417 	if (avail >= 120) {
2418 		char *id_str;
2419 		err = got_object_id_str(&id_str, id);
2420 		if (err)
2421 			goto done;
2422 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2423 		if (tc)
2424 			wattr_on(view->window,
2425 			    COLOR_PAIR(tc->colorpair), NULL);
2426 		wprintw(view->window, "%.8s ", id_str);
2427 		if (tc)
2428 			wattr_off(view->window,
2429 			    COLOR_PAIR(tc->colorpair), NULL);
2430 		free(id_str);
2431 		col += 9;
2432 		if (col > avail)
2433 			goto done;
2434 	}
2435 
2436 	if (s->use_committer)
2437 		author = strdup(got_object_commit_get_committer(commit));
2438 	else
2439 		author = strdup(got_object_commit_get_author(commit));
2440 	if (author == NULL) {
2441 		err = got_error_from_errno("strdup");
2442 		goto done;
2443 	}
2444 	err = format_author(&wauthor, &author_width, author, avail - col, col);
2445 	if (err)
2446 		goto done;
2447 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
2448 	if (tc)
2449 		wattr_on(view->window,
2450 		    COLOR_PAIR(tc->colorpair), NULL);
2451 	waddwstr(view->window, wauthor);
2452 	col += author_width;
2453 	while (col < avail && author_width < author_display_cols + 2) {
2454 		waddch(view->window, ' ');
2455 		col++;
2456 		author_width++;
2457 	}
2458 	if (tc)
2459 		wattr_off(view->window,
2460 		    COLOR_PAIR(tc->colorpair), NULL);
2461 	if (col > avail)
2462 		goto done;
2463 
2464 	err = got_object_commit_get_logmsg(&logmsg0, commit);
2465 	if (err)
2466 		goto done;
2467 	logmsg = logmsg0;
2468 	while (*logmsg == '\n')
2469 		logmsg++;
2470 	newline = strchr(logmsg, '\n');
2471 	if (newline)
2472 		*newline = '\0';
2473 	limit = avail - col;
2474 	if (view->child && !view_is_hsplit_top(view) && limit > 0)
2475 		limit--;	/* for the border */
2476 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
2477 	    limit, col, 1);
2478 	if (err)
2479 		goto done;
2480 	waddwstr(view->window, &wlogmsg[scrollx]);
2481 	col += MAX(logmsg_width, 0);
2482 	while (col < avail) {
2483 		waddch(view->window, ' ');
2484 		col++;
2485 	}
2486 done:
2487 	free(logmsg0);
2488 	free(wlogmsg);
2489 	free(author);
2490 	free(wauthor);
2491 	free(line);
2492 	return err;
2493 }
2494 
2495 static struct commit_queue_entry *
2496 alloc_commit_queue_entry(struct got_commit_object *commit,
2497     struct got_object_id *id)
2498 {
2499 	struct commit_queue_entry *entry;
2500 	struct got_object_id *dup;
2501 
2502 	entry = calloc(1, sizeof(*entry));
2503 	if (entry == NULL)
2504 		return NULL;
2505 
2506 	dup = got_object_id_dup(id);
2507 	if (dup == NULL) {
2508 		free(entry);
2509 		return NULL;
2510 	}
2511 
2512 	entry->id = dup;
2513 	entry->commit = commit;
2514 	return entry;
2515 }
2516 
2517 static void
2518 pop_commit(struct commit_queue *commits)
2519 {
2520 	struct commit_queue_entry *entry;
2521 
2522 	entry = TAILQ_FIRST(&commits->head);
2523 	TAILQ_REMOVE(&commits->head, entry, entry);
2524 	got_object_commit_close(entry->commit);
2525 	commits->ncommits--;
2526 	free(entry->id);
2527 	free(entry);
2528 }
2529 
2530 static void
2531 free_commits(struct commit_queue *commits)
2532 {
2533 	while (!TAILQ_EMPTY(&commits->head))
2534 		pop_commit(commits);
2535 }
2536 
2537 static const struct got_error *
2538 match_commit(int *have_match, struct got_object_id *id,
2539     struct got_commit_object *commit, regex_t *regex)
2540 {
2541 	const struct got_error *err = NULL;
2542 	regmatch_t regmatch;
2543 	char *id_str = NULL, *logmsg = NULL;
2544 
2545 	*have_match = 0;
2546 
2547 	err = got_object_id_str(&id_str, id);
2548 	if (err)
2549 		return err;
2550 
2551 	err = got_object_commit_get_logmsg(&logmsg, commit);
2552 	if (err)
2553 		goto done;
2554 
2555 	if (regexec(regex, got_object_commit_get_author(commit), 1,
2556 	    &regmatch, 0) == 0 ||
2557 	    regexec(regex, got_object_commit_get_committer(commit), 1,
2558 	    &regmatch, 0) == 0 ||
2559 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
2560 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
2561 		*have_match = 1;
2562 done:
2563 	free(id_str);
2564 	free(logmsg);
2565 	return err;
2566 }
2567 
2568 static const struct got_error *
2569 queue_commits(struct tog_log_thread_args *a)
2570 {
2571 	const struct got_error *err = NULL;
2572 
2573 	/*
2574 	 * We keep all commits open throughout the lifetime of the log
2575 	 * view in order to avoid having to re-fetch commits from disk
2576 	 * while updating the display.
2577 	 */
2578 	do {
2579 		struct got_object_id id;
2580 		struct got_commit_object *commit;
2581 		struct commit_queue_entry *entry;
2582 		int limit_match = 0;
2583 		int errcode;
2584 
2585 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
2586 		    NULL, NULL);
2587 		if (err)
2588 			break;
2589 
2590 		err = got_object_open_as_commit(&commit, a->repo, &id);
2591 		if (err)
2592 			break;
2593 		entry = alloc_commit_queue_entry(commit, &id);
2594 		if (entry == NULL) {
2595 			err = got_error_from_errno("alloc_commit_queue_entry");
2596 			break;
2597 		}
2598 
2599 		errcode = pthread_mutex_lock(&tog_mutex);
2600 		if (errcode) {
2601 			err = got_error_set_errno(errcode,
2602 			    "pthread_mutex_lock");
2603 			break;
2604 		}
2605 
2606 		entry->idx = a->real_commits->ncommits;
2607 		TAILQ_INSERT_TAIL(&a->real_commits->head, entry, entry);
2608 		a->real_commits->ncommits++;
2609 
2610 		if (*a->limiting) {
2611 			err = match_commit(&limit_match, &id, commit,
2612 			    a->limit_regex);
2613 			if (err)
2614 				break;
2615 
2616 			if (limit_match) {
2617 				struct commit_queue_entry *matched;
2618 
2619 				matched = alloc_commit_queue_entry(
2620 				    entry->commit, entry->id);
2621 				if (matched == NULL) {
2622 					err = got_error_from_errno(
2623 					    "alloc_commit_queue_entry");
2624 					break;
2625 				}
2626 				matched->commit = entry->commit;
2627 				got_object_commit_retain(entry->commit);
2628 
2629 				matched->idx = a->limit_commits->ncommits;
2630 				TAILQ_INSERT_TAIL(&a->limit_commits->head,
2631 				    matched, entry);
2632 				a->limit_commits->ncommits++;
2633 			}
2634 
2635 			/*
2636 			 * This is how we signal log_thread() that we
2637 			 * have found a match, and that it should be
2638 			 * counted as a new entry for the view.
2639 			 */
2640 			a->limit_match = limit_match;
2641 		}
2642 
2643 		if (*a->searching == TOG_SEARCH_FORWARD &&
2644 		    !*a->search_next_done) {
2645 			int have_match;
2646 			err = match_commit(&have_match, &id, commit, a->regex);
2647 			if (err)
2648 				break;
2649 
2650 			if (*a->limiting) {
2651 				if (limit_match && have_match)
2652 					*a->search_next_done =
2653 					    TOG_SEARCH_HAVE_MORE;
2654 			} else if (have_match)
2655 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
2656 		}
2657 
2658 		errcode = pthread_mutex_unlock(&tog_mutex);
2659 		if (errcode && err == NULL)
2660 			err = got_error_set_errno(errcode,
2661 			    "pthread_mutex_unlock");
2662 		if (err)
2663 			break;
2664 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
2665 
2666 	return err;
2667 }
2668 
2669 static void
2670 select_commit(struct tog_log_view_state *s)
2671 {
2672 	struct commit_queue_entry *entry;
2673 	int ncommits = 0;
2674 
2675 	entry = s->first_displayed_entry;
2676 	while (entry) {
2677 		if (ncommits == s->selected) {
2678 			s->selected_entry = entry;
2679 			break;
2680 		}
2681 		entry = TAILQ_NEXT(entry, entry);
2682 		ncommits++;
2683 	}
2684 }
2685 
2686 static const struct got_error *
2687 draw_commits(struct tog_view *view)
2688 {
2689 	const struct got_error *err = NULL;
2690 	struct tog_log_view_state *s = &view->state.log;
2691 	struct commit_queue_entry *entry = s->selected_entry;
2692 	int limit = view->nlines;
2693 	int width;
2694 	int ncommits, author_cols = 4;
2695 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
2696 	char *refs_str = NULL;
2697 	wchar_t *wline;
2698 	struct tog_color *tc;
2699 	static const size_t date_display_cols = 12;
2700 
2701 	if (view_is_hsplit_top(view))
2702 		--limit;  /* account for border */
2703 
2704 	if (s->selected_entry &&
2705 	    !(view->searching && view->search_next_done == 0)) {
2706 		struct got_reflist_head *refs;
2707 		err = got_object_id_str(&id_str, s->selected_entry->id);
2708 		if (err)
2709 			return err;
2710 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
2711 		    s->selected_entry->id);
2712 		if (refs) {
2713 			err = build_refs_str(&refs_str, refs,
2714 			    s->selected_entry->id, s->repo);
2715 			if (err)
2716 				goto done;
2717 		}
2718 	}
2719 
2720 	if (s->thread_args.commits_needed == 0 && !using_mock_io)
2721 		halfdelay(10); /* disable fast refresh */
2722 
2723 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
2724 		if (asprintf(&ncommits_str, " [%d/%d] %s",
2725 		    entry ? entry->idx + 1 : 0, s->commits->ncommits,
2726 		    (view->searching && !view->search_next_done) ?
2727 		    "searching..." : "loading...") == -1) {
2728 			err = got_error_from_errno("asprintf");
2729 			goto done;
2730 		}
2731 	} else {
2732 		const char *search_str = NULL;
2733 		const char *limit_str = NULL;
2734 
2735 		if (view->searching) {
2736 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
2737 				search_str = "no more matches";
2738 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
2739 				search_str = "no matches found";
2740 			else if (!view->search_next_done)
2741 				search_str = "searching...";
2742 		}
2743 
2744 		if (s->limit_view && s->commits->ncommits == 0)
2745 			limit_str = "no matches found";
2746 
2747 		if (asprintf(&ncommits_str, " [%d/%d] %s %s",
2748 		    entry ? entry->idx + 1 : 0, s->commits->ncommits,
2749 		    search_str ? search_str : (refs_str ? refs_str : ""),
2750 		    limit_str ? limit_str : "") == -1) {
2751 			err = got_error_from_errno("asprintf");
2752 			goto done;
2753 		}
2754 	}
2755 
2756 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
2757 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
2758 		    "........................................",
2759 		    s->in_repo_path, ncommits_str) == -1) {
2760 			err = got_error_from_errno("asprintf");
2761 			header = NULL;
2762 			goto done;
2763 		}
2764 	} else if (asprintf(&header, "commit %s%s",
2765 	    id_str ? id_str : "........................................",
2766 	    ncommits_str) == -1) {
2767 		err = got_error_from_errno("asprintf");
2768 		header = NULL;
2769 		goto done;
2770 	}
2771 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
2772 	if (err)
2773 		goto done;
2774 
2775 	werase(view->window);
2776 
2777 	if (view_needs_focus_indication(view))
2778 		wstandout(view->window);
2779 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2780 	if (tc)
2781 		wattr_on(view->window, COLOR_PAIR(tc->colorpair), NULL);
2782 	waddwstr(view->window, wline);
2783 	while (width < view->ncols) {
2784 		waddch(view->window, ' ');
2785 		width++;
2786 	}
2787 	if (tc)
2788 		wattr_off(view->window, COLOR_PAIR(tc->colorpair), NULL);
2789 	if (view_needs_focus_indication(view))
2790 		wstandend(view->window);
2791 	free(wline);
2792 	if (limit <= 1)
2793 		goto done;
2794 
2795 	/* Grow author column size if necessary, and set view->maxx. */
2796 	entry = s->first_displayed_entry;
2797 	ncommits = 0;
2798 	view->maxx = 0;
2799 	while (entry) {
2800 		struct got_commit_object *c = entry->commit;
2801 		char *author, *eol, *msg, *msg0;
2802 		wchar_t *wauthor, *wmsg;
2803 		int width;
2804 		if (ncommits >= limit - 1)
2805 			break;
2806 		if (s->use_committer)
2807 			author = strdup(got_object_commit_get_committer(c));
2808 		else
2809 			author = strdup(got_object_commit_get_author(c));
2810 		if (author == NULL) {
2811 			err = got_error_from_errno("strdup");
2812 			goto done;
2813 		}
2814 		err = format_author(&wauthor, &width, author, COLS,
2815 		    date_display_cols);
2816 		if (author_cols < width)
2817 			author_cols = width;
2818 		free(wauthor);
2819 		free(author);
2820 		if (err)
2821 			goto done;
2822 		err = got_object_commit_get_logmsg(&msg0, c);
2823 		if (err)
2824 			goto done;
2825 		msg = msg0;
2826 		while (*msg == '\n')
2827 			++msg;
2828 		if ((eol = strchr(msg, '\n')))
2829 			*eol = '\0';
2830 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
2831 		    date_display_cols + author_cols, 0);
2832 		if (err)
2833 			goto done;
2834 		view->maxx = MAX(view->maxx, width);
2835 		free(msg0);
2836 		free(wmsg);
2837 		ncommits++;
2838 		entry = TAILQ_NEXT(entry, entry);
2839 	}
2840 
2841 	entry = s->first_displayed_entry;
2842 	s->last_displayed_entry = s->first_displayed_entry;
2843 	ncommits = 0;
2844 	while (entry) {
2845 		if (ncommits >= limit - 1)
2846 			break;
2847 		if (ncommits == s->selected)
2848 			wstandout(view->window);
2849 		err = draw_commit(view, entry->commit, entry->id,
2850 		    date_display_cols, author_cols);
2851 		if (ncommits == s->selected)
2852 			wstandend(view->window);
2853 		if (err)
2854 			goto done;
2855 		ncommits++;
2856 		s->last_displayed_entry = entry;
2857 		entry = TAILQ_NEXT(entry, entry);
2858 	}
2859 
2860 	view_border(view);
2861 done:
2862 	free(id_str);
2863 	free(refs_str);
2864 	free(ncommits_str);
2865 	free(header);
2866 	return err;
2867 }
2868 
2869 static void
2870 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
2871 {
2872 	struct commit_queue_entry *entry;
2873 	int nscrolled = 0;
2874 
2875 	entry = TAILQ_FIRST(&s->commits->head);
2876 	if (s->first_displayed_entry == entry)
2877 		return;
2878 
2879 	entry = s->first_displayed_entry;
2880 	while (entry && nscrolled < maxscroll) {
2881 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
2882 		if (entry) {
2883 			s->first_displayed_entry = entry;
2884 			nscrolled++;
2885 		}
2886 	}
2887 }
2888 
2889 static const struct got_error *
2890 trigger_log_thread(struct tog_view *view, int wait)
2891 {
2892 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
2893 	int errcode;
2894 
2895 	if (!using_mock_io)
2896 		halfdelay(1); /* fast refresh while loading commits */
2897 
2898 	while (!ta->log_complete && !tog_thread_error &&
2899 	    (ta->commits_needed > 0 || ta->load_all)) {
2900 		/* Wake the log thread. */
2901 		errcode = pthread_cond_signal(&ta->need_commits);
2902 		if (errcode)
2903 			return got_error_set_errno(errcode,
2904 			    "pthread_cond_signal");
2905 
2906 		/*
2907 		 * The mutex will be released while the view loop waits
2908 		 * in wgetch(), at which time the log thread will run.
2909 		 */
2910 		if (!wait)
2911 			break;
2912 
2913 		/* Display progress update in log view. */
2914 		show_log_view(view);
2915 		update_panels();
2916 		doupdate();
2917 
2918 		/* Wait right here while next commit is being loaded. */
2919 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
2920 		if (errcode)
2921 			return got_error_set_errno(errcode,
2922 			    "pthread_cond_wait");
2923 
2924 		/* Display progress update in log view. */
2925 		show_log_view(view);
2926 		update_panels();
2927 		doupdate();
2928 	}
2929 
2930 	return NULL;
2931 }
2932 
2933 static const struct got_error *
2934 request_log_commits(struct tog_view *view)
2935 {
2936 	struct tog_log_view_state	*state = &view->state.log;
2937 	const struct got_error		*err = NULL;
2938 
2939 	if (state->thread_args.log_complete)
2940 		return NULL;
2941 
2942 	state->thread_args.commits_needed += view->nscrolled;
2943 	err = trigger_log_thread(view, 1);
2944 	view->nscrolled = 0;
2945 
2946 	return err;
2947 }
2948 
2949 static const struct got_error *
2950 log_scroll_down(struct tog_view *view, int maxscroll)
2951 {
2952 	struct tog_log_view_state *s = &view->state.log;
2953 	const struct got_error *err = NULL;
2954 	struct commit_queue_entry *pentry;
2955 	int nscrolled = 0, ncommits_needed;
2956 
2957 	if (s->last_displayed_entry == NULL)
2958 		return NULL;
2959 
2960 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
2961 	if (s->commits->ncommits < ncommits_needed &&
2962 	    !s->thread_args.log_complete) {
2963 		/*
2964 		 * Ask the log thread for required amount of commits.
2965 		 */
2966 		s->thread_args.commits_needed +=
2967 		    ncommits_needed - s->commits->ncommits;
2968 		err = trigger_log_thread(view, 1);
2969 		if (err)
2970 			return err;
2971 	}
2972 
2973 	do {
2974 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
2975 		if (pentry == NULL && view->mode != TOG_VIEW_SPLIT_HRZN)
2976 			break;
2977 
2978 		s->last_displayed_entry = pentry ?
2979 		    pentry : s->last_displayed_entry;
2980 
2981 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
2982 		if (pentry == NULL)
2983 			break;
2984 		s->first_displayed_entry = pentry;
2985 	} while (++nscrolled < maxscroll);
2986 
2987 	if (view->mode == TOG_VIEW_SPLIT_HRZN && !s->thread_args.log_complete)
2988 		view->nscrolled += nscrolled;
2989 	else
2990 		view->nscrolled = 0;
2991 
2992 	return err;
2993 }
2994 
2995 static const struct got_error *
2996 open_diff_view_for_commit(struct tog_view **new_view, int begin_y, int begin_x,
2997     struct got_commit_object *commit, struct got_object_id *commit_id,
2998     struct tog_view *log_view, struct got_repository *repo)
2999 {
3000 	const struct got_error *err;
3001 	struct got_object_qid *parent_id;
3002 	struct tog_view *diff_view;
3003 
3004 	diff_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_DIFF);
3005 	if (diff_view == NULL)
3006 		return got_error_from_errno("view_open");
3007 
3008 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
3009 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
3010 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
3011 	if (err == NULL)
3012 		*new_view = diff_view;
3013 	return err;
3014 }
3015 
3016 static const struct got_error *
3017 tree_view_visit_subtree(struct tog_tree_view_state *s,
3018     struct got_tree_object *subtree)
3019 {
3020 	struct tog_parent_tree *parent;
3021 
3022 	parent = calloc(1, sizeof(*parent));
3023 	if (parent == NULL)
3024 		return got_error_from_errno("calloc");
3025 
3026 	parent->tree = s->tree;
3027 	parent->first_displayed_entry = s->first_displayed_entry;
3028 	parent->selected_entry = s->selected_entry;
3029 	parent->selected = s->selected;
3030 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
3031 	s->tree = subtree;
3032 	s->selected = 0;
3033 	s->first_displayed_entry = NULL;
3034 	return NULL;
3035 }
3036 
3037 static const struct got_error *
3038 tree_view_walk_path(struct tog_tree_view_state *s,
3039     struct got_commit_object *commit, const char *path)
3040 {
3041 	const struct got_error *err = NULL;
3042 	struct got_tree_object *tree = NULL;
3043 	const char *p;
3044 	char *slash, *subpath = NULL;
3045 
3046 	/* Walk the path and open corresponding tree objects. */
3047 	p = path;
3048 	while (*p) {
3049 		struct got_tree_entry *te;
3050 		struct got_object_id *tree_id;
3051 		char *te_name;
3052 
3053 		while (p[0] == '/')
3054 			p++;
3055 
3056 		/* Ensure the correct subtree entry is selected. */
3057 		slash = strchr(p, '/');
3058 		if (slash == NULL)
3059 			te_name = strdup(p);
3060 		else
3061 			te_name = strndup(p, slash - p);
3062 		if (te_name == NULL) {
3063 			err = got_error_from_errno("strndup");
3064 			break;
3065 		}
3066 		te = got_object_tree_find_entry(s->tree, te_name);
3067 		if (te == NULL) {
3068 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
3069 			free(te_name);
3070 			break;
3071 		}
3072 		free(te_name);
3073 		s->first_displayed_entry = s->selected_entry = te;
3074 
3075 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
3076 			break; /* jump to this file's entry */
3077 
3078 		slash = strchr(p, '/');
3079 		if (slash)
3080 			subpath = strndup(path, slash - path);
3081 		else
3082 			subpath = strdup(path);
3083 		if (subpath == NULL) {
3084 			err = got_error_from_errno("strdup");
3085 			break;
3086 		}
3087 
3088 		err = got_object_id_by_path(&tree_id, s->repo, commit,
3089 		    subpath);
3090 		if (err)
3091 			break;
3092 
3093 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
3094 		free(tree_id);
3095 		if (err)
3096 			break;
3097 
3098 		err = tree_view_visit_subtree(s, tree);
3099 		if (err) {
3100 			got_object_tree_close(tree);
3101 			break;
3102 		}
3103 		if (slash == NULL)
3104 			break;
3105 		free(subpath);
3106 		subpath = NULL;
3107 		p = slash;
3108 	}
3109 
3110 	free(subpath);
3111 	return err;
3112 }
3113 
3114 static const struct got_error *
3115 browse_commit_tree(struct tog_view **new_view, int begin_y, int begin_x,
3116     struct commit_queue_entry *entry, const char *path,
3117     const char *head_ref_name, struct got_repository *repo)
3118 {
3119 	const struct got_error *err = NULL;
3120 	struct tog_tree_view_state *s;
3121 	struct tog_view *tree_view;
3122 
3123 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
3124 	if (tree_view == NULL)
3125 		return got_error_from_errno("view_open");
3126 
3127 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
3128 	if (err)
3129 		return err;
3130 	s = &tree_view->state.tree;
3131 
3132 	*new_view = tree_view;
3133 
3134 	if (got_path_is_root_dir(path))
3135 		return NULL;
3136 
3137 	return tree_view_walk_path(s, entry->commit, path);
3138 }
3139 
3140 static const struct got_error *
3141 block_signals_used_by_main_thread(void)
3142 {
3143 	sigset_t sigset;
3144 	int errcode;
3145 
3146 	if (sigemptyset(&sigset) == -1)
3147 		return got_error_from_errno("sigemptyset");
3148 
3149 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
3150 	if (sigaddset(&sigset, SIGWINCH) == -1)
3151 		return got_error_from_errno("sigaddset");
3152 	if (sigaddset(&sigset, SIGCONT) == -1)
3153 		return got_error_from_errno("sigaddset");
3154 	if (sigaddset(&sigset, SIGINT) == -1)
3155 		return got_error_from_errno("sigaddset");
3156 	if (sigaddset(&sigset, SIGTERM) == -1)
3157 		return got_error_from_errno("sigaddset");
3158 
3159 	/* ncurses handles SIGTSTP */
3160 	if (sigaddset(&sigset, SIGTSTP) == -1)
3161 		return got_error_from_errno("sigaddset");
3162 
3163 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
3164 	if (errcode)
3165 		return got_error_set_errno(errcode, "pthread_sigmask");
3166 
3167 	return NULL;
3168 }
3169 
3170 static void *
3171 log_thread(void *arg)
3172 {
3173 	const struct got_error *err = NULL;
3174 	int errcode = 0;
3175 	struct tog_log_thread_args *a = arg;
3176 	int done = 0;
3177 
3178 	/*
3179 	 * Sync startup with main thread such that we begin our
3180 	 * work once view_input() has released the mutex.
3181 	 */
3182 	errcode = pthread_mutex_lock(&tog_mutex);
3183 	if (errcode) {
3184 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
3185 		return (void *)err;
3186 	}
3187 
3188 	err = block_signals_used_by_main_thread();
3189 	if (err) {
3190 		pthread_mutex_unlock(&tog_mutex);
3191 		goto done;
3192 	}
3193 
3194 	while (!done && !err && !tog_fatal_signal_received()) {
3195 		errcode = pthread_mutex_unlock(&tog_mutex);
3196 		if (errcode) {
3197 			err = got_error_set_errno(errcode,
3198 			    "pthread_mutex_unlock");
3199 			goto done;
3200 		}
3201 		err = queue_commits(a);
3202 		if (err) {
3203 			if (err->code != GOT_ERR_ITER_COMPLETED)
3204 				goto done;
3205 			err = NULL;
3206 			done = 1;
3207 		} else if (a->commits_needed > 0 && !a->load_all) {
3208 			if (*a->limiting) {
3209 				if (a->limit_match)
3210 					a->commits_needed--;
3211 			} else
3212 				a->commits_needed--;
3213 		}
3214 
3215 		errcode = pthread_mutex_lock(&tog_mutex);
3216 		if (errcode) {
3217 			err = got_error_set_errno(errcode,
3218 			    "pthread_mutex_lock");
3219 			goto done;
3220 		} else if (*a->quit)
3221 			done = 1;
3222 		else if (*a->limiting && *a->first_displayed_entry == NULL) {
3223 			*a->first_displayed_entry =
3224 			    TAILQ_FIRST(&a->limit_commits->head);
3225 			*a->selected_entry = *a->first_displayed_entry;
3226 		} else if (*a->first_displayed_entry == NULL) {
3227 			*a->first_displayed_entry =
3228 			    TAILQ_FIRST(&a->real_commits->head);
3229 			*a->selected_entry = *a->first_displayed_entry;
3230 		}
3231 
3232 		errcode = pthread_cond_signal(&a->commit_loaded);
3233 		if (errcode) {
3234 			err = got_error_set_errno(errcode,
3235 			    "pthread_cond_signal");
3236 			pthread_mutex_unlock(&tog_mutex);
3237 			goto done;
3238 		}
3239 
3240 		if (done)
3241 			a->commits_needed = 0;
3242 		else {
3243 			if (a->commits_needed == 0 && !a->load_all) {
3244 				errcode = pthread_cond_wait(&a->need_commits,
3245 				    &tog_mutex);
3246 				if (errcode) {
3247 					err = got_error_set_errno(errcode,
3248 					    "pthread_cond_wait");
3249 					pthread_mutex_unlock(&tog_mutex);
3250 					goto done;
3251 				}
3252 				if (*a->quit)
3253 					done = 1;
3254 			}
3255 		}
3256 	}
3257 	a->log_complete = 1;
3258 	errcode = pthread_mutex_unlock(&tog_mutex);
3259 	if (errcode)
3260 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
3261 done:
3262 	if (err) {
3263 		tog_thread_error = 1;
3264 		pthread_cond_signal(&a->commit_loaded);
3265 	}
3266 	return (void *)err;
3267 }
3268 
3269 static const struct got_error *
3270 stop_log_thread(struct tog_log_view_state *s)
3271 {
3272 	const struct got_error *err = NULL, *thread_err = NULL;
3273 	int errcode;
3274 
3275 	if (s->thread) {
3276 		s->quit = 1;
3277 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
3278 		if (errcode)
3279 			return got_error_set_errno(errcode,
3280 			    "pthread_cond_signal");
3281 		errcode = pthread_mutex_unlock(&tog_mutex);
3282 		if (errcode)
3283 			return got_error_set_errno(errcode,
3284 			    "pthread_mutex_unlock");
3285 		errcode = pthread_join(s->thread, (void **)&thread_err);
3286 		if (errcode)
3287 			return got_error_set_errno(errcode, "pthread_join");
3288 		errcode = pthread_mutex_lock(&tog_mutex);
3289 		if (errcode)
3290 			return got_error_set_errno(errcode,
3291 			    "pthread_mutex_lock");
3292 		s->thread = 0; //NULL;
3293 	}
3294 
3295 	if (s->thread_args.repo) {
3296 		err = got_repo_close(s->thread_args.repo);
3297 		s->thread_args.repo = NULL;
3298 	}
3299 
3300 	if (s->thread_args.pack_fds) {
3301 		const struct got_error *pack_err =
3302 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
3303 		if (err == NULL)
3304 			err = pack_err;
3305 		s->thread_args.pack_fds = NULL;
3306 	}
3307 
3308 	if (s->thread_args.graph) {
3309 		got_commit_graph_close(s->thread_args.graph);
3310 		s->thread_args.graph = NULL;
3311 	}
3312 
3313 	return err ? err : thread_err;
3314 }
3315 
3316 static const struct got_error *
3317 close_log_view(struct tog_view *view)
3318 {
3319 	const struct got_error *err = NULL;
3320 	struct tog_log_view_state *s = &view->state.log;
3321 	int errcode;
3322 
3323 	err = stop_log_thread(s);
3324 
3325 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
3326 	if (errcode && err == NULL)
3327 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
3328 
3329 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
3330 	if (errcode && err == NULL)
3331 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
3332 
3333 	free_commits(&s->limit_commits);
3334 	free_commits(&s->real_commits);
3335 	free(s->in_repo_path);
3336 	s->in_repo_path = NULL;
3337 	free(s->start_id);
3338 	s->start_id = NULL;
3339 	free(s->head_ref_name);
3340 	s->head_ref_name = NULL;
3341 	return err;
3342 }
3343 
3344 /*
3345  * We use two queues to implement the limit feature: first consists of
3346  * commits matching the current limit_regex; second is the real queue
3347  * of all known commits (real_commits). When the user starts limiting,
3348  * we swap queues such that all movement and displaying functionality
3349  * works with very slight change.
3350  */
3351 static const struct got_error *
3352 limit_log_view(struct tog_view *view)
3353 {
3354 	struct tog_log_view_state *s = &view->state.log;
3355 	struct commit_queue_entry *entry;
3356 	struct tog_view	*v = view;
3357 	const struct got_error *err = NULL;
3358 	char pattern[1024];
3359 	int ret;
3360 
3361 	if (view_is_hsplit_top(view))
3362 		v = view->child;
3363 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
3364 		v = view->parent;
3365 
3366 	/* Get the pattern */
3367 	wmove(v->window, v->nlines - 1, 0);
3368 	wclrtoeol(v->window);
3369 	mvwaddstr(v->window, v->nlines - 1, 0, "&/");
3370 	nodelay(v->window, FALSE);
3371 	nocbreak();
3372 	echo();
3373 	ret = wgetnstr(v->window, pattern, sizeof(pattern));
3374 	cbreak();
3375 	noecho();
3376 	nodelay(v->window, TRUE);
3377 	if (ret == ERR)
3378 		return NULL;
3379 
3380 	if (*pattern == '\0') {
3381 		/*
3382 		 * Safety measure for the situation where the user
3383 		 * resets limit without previously limiting anything.
3384 		 */
3385 		if (!s->limit_view)
3386 			return NULL;
3387 
3388 		/*
3389 		 * User could have pressed Ctrl+L, which refreshed the
3390 		 * commit queues, it means we can't save previously
3391 		 * (before limit took place) displayed entries,
3392 		 * because they would point to already free'ed memory,
3393 		 * so we are forced to always select first entry of
3394 		 * the queue.
3395 		 */
3396 		s->commits = &s->real_commits;
3397 		s->first_displayed_entry = TAILQ_FIRST(&s->real_commits.head);
3398 		s->selected_entry = s->first_displayed_entry;
3399 		s->selected = 0;
3400 		s->limit_view = 0;
3401 
3402 		return NULL;
3403 	}
3404 
3405 	if (regcomp(&s->limit_regex, pattern, REG_EXTENDED | REG_NEWLINE))
3406 		return NULL;
3407 
3408 	s->limit_view = 1;
3409 
3410 	/* Clear the screen while loading limit view */
3411 	s->first_displayed_entry = NULL;
3412 	s->last_displayed_entry = NULL;
3413 	s->selected_entry = NULL;
3414 	s->commits = &s->limit_commits;
3415 
3416 	/* Prepare limit queue for new search */
3417 	free_commits(&s->limit_commits);
3418 	s->limit_commits.ncommits = 0;
3419 
3420 	/* First process commits, which are in queue already */
3421 	TAILQ_FOREACH(entry, &s->real_commits.head, entry) {
3422 		int have_match = 0;
3423 
3424 		err = match_commit(&have_match, entry->id,
3425 		    entry->commit, &s->limit_regex);
3426 		if (err)
3427 			return err;
3428 
3429 		if (have_match) {
3430 			struct commit_queue_entry *matched;
3431 
3432 			matched = alloc_commit_queue_entry(entry->commit,
3433 			    entry->id);
3434 			if (matched == NULL) {
3435 				err = got_error_from_errno(
3436 				    "alloc_commit_queue_entry");
3437 				break;
3438 			}
3439 			matched->commit = entry->commit;
3440 			got_object_commit_retain(entry->commit);
3441 
3442 			matched->idx = s->limit_commits.ncommits;
3443 			TAILQ_INSERT_TAIL(&s->limit_commits.head,
3444 			    matched, entry);
3445 			s->limit_commits.ncommits++;
3446 		}
3447 	}
3448 
3449 	/* Second process all the commits, until we fill the screen */
3450 	if (s->limit_commits.ncommits < view->nlines - 1 &&
3451 	    !s->thread_args.log_complete) {
3452 		s->thread_args.commits_needed +=
3453 		    view->nlines - s->limit_commits.ncommits - 1;
3454 		err = trigger_log_thread(view, 1);
3455 		if (err)
3456 			return err;
3457 	}
3458 
3459 	s->first_displayed_entry = TAILQ_FIRST(&s->commits->head);
3460 	s->selected_entry = TAILQ_FIRST(&s->commits->head);
3461 	s->selected = 0;
3462 
3463 	return NULL;
3464 }
3465 
3466 static const struct got_error *
3467 search_start_log_view(struct tog_view *view)
3468 {
3469 	struct tog_log_view_state *s = &view->state.log;
3470 
3471 	s->matched_entry = NULL;
3472 	s->search_entry = NULL;
3473 	return NULL;
3474 }
3475 
3476 static const struct got_error *
3477 search_next_log_view(struct tog_view *view)
3478 {
3479 	const struct got_error *err = NULL;
3480 	struct tog_log_view_state *s = &view->state.log;
3481 	struct commit_queue_entry *entry;
3482 
3483 	/* Display progress update in log view. */
3484 	show_log_view(view);
3485 	update_panels();
3486 	doupdate();
3487 
3488 	if (s->search_entry) {
3489 		int errcode, ch;
3490 		errcode = pthread_mutex_unlock(&tog_mutex);
3491 		if (errcode)
3492 			return got_error_set_errno(errcode,
3493 			    "pthread_mutex_unlock");
3494 		ch = wgetch(view->window);
3495 		errcode = pthread_mutex_lock(&tog_mutex);
3496 		if (errcode)
3497 			return got_error_set_errno(errcode,
3498 			    "pthread_mutex_lock");
3499 		if (ch == CTRL('g') || ch == KEY_BACKSPACE) {
3500 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3501 			return NULL;
3502 		}
3503 		if (view->searching == TOG_SEARCH_FORWARD)
3504 			entry = TAILQ_NEXT(s->search_entry, entry);
3505 		else
3506 			entry = TAILQ_PREV(s->search_entry,
3507 			    commit_queue_head, entry);
3508 	} else if (s->matched_entry) {
3509 		/*
3510 		 * If the user has moved the cursor after we hit a match,
3511 		 * the position from where we should continue searching
3512 		 * might have changed.
3513 		 */
3514 		if (view->searching == TOG_SEARCH_FORWARD)
3515 			entry = TAILQ_NEXT(s->selected_entry, entry);
3516 		else
3517 			entry = TAILQ_PREV(s->selected_entry, commit_queue_head,
3518 			    entry);
3519 	} else {
3520 		entry = s->selected_entry;
3521 	}
3522 
3523 	while (1) {
3524 		int have_match = 0;
3525 
3526 		if (entry == NULL) {
3527 			if (s->thread_args.log_complete ||
3528 			    view->searching == TOG_SEARCH_BACKWARD) {
3529 				view->search_next_done =
3530 				    (s->matched_entry == NULL ?
3531 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
3532 				s->search_entry = NULL;
3533 				return NULL;
3534 			}
3535 			/*
3536 			 * Poke the log thread for more commits and return,
3537 			 * allowing the main loop to make progress. Search
3538 			 * will resume at s->search_entry once we come back.
3539 			 */
3540 			s->thread_args.commits_needed++;
3541 			return trigger_log_thread(view, 0);
3542 		}
3543 
3544 		err = match_commit(&have_match, entry->id, entry->commit,
3545 		    &view->regex);
3546 		if (err)
3547 			break;
3548 		if (have_match) {
3549 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
3550 			s->matched_entry = entry;
3551 			break;
3552 		}
3553 
3554 		s->search_entry = entry;
3555 		if (view->searching == TOG_SEARCH_FORWARD)
3556 			entry = TAILQ_NEXT(entry, entry);
3557 		else
3558 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
3559 	}
3560 
3561 	if (s->matched_entry) {
3562 		int cur = s->selected_entry->idx;
3563 		while (cur < s->matched_entry->idx) {
3564 			err = input_log_view(NULL, view, KEY_DOWN);
3565 			if (err)
3566 				return err;
3567 			cur++;
3568 		}
3569 		while (cur > s->matched_entry->idx) {
3570 			err = input_log_view(NULL, view, KEY_UP);
3571 			if (err)
3572 				return err;
3573 			cur--;
3574 		}
3575 	}
3576 
3577 	s->search_entry = NULL;
3578 
3579 	return NULL;
3580 }
3581 
3582 static const struct got_error *
3583 open_log_view(struct tog_view *view, struct got_object_id *start_id,
3584     struct got_repository *repo, const char *head_ref_name,
3585     const char *in_repo_path, int log_branches)
3586 {
3587 	const struct got_error *err = NULL;
3588 	struct tog_log_view_state *s = &view->state.log;
3589 	struct got_repository *thread_repo = NULL;
3590 	struct got_commit_graph *thread_graph = NULL;
3591 	int errcode;
3592 
3593 	if (in_repo_path != s->in_repo_path) {
3594 		free(s->in_repo_path);
3595 		s->in_repo_path = strdup(in_repo_path);
3596 		if (s->in_repo_path == NULL) {
3597 			err = got_error_from_errno("strdup");
3598 			goto done;
3599 		}
3600 	}
3601 
3602 	/* The commit queue only contains commits being displayed. */
3603 	TAILQ_INIT(&s->real_commits.head);
3604 	s->real_commits.ncommits = 0;
3605 	s->commits = &s->real_commits;
3606 
3607 	TAILQ_INIT(&s->limit_commits.head);
3608 	s->limit_view = 0;
3609 	s->limit_commits.ncommits = 0;
3610 
3611 	s->repo = repo;
3612 	if (head_ref_name) {
3613 		s->head_ref_name = strdup(head_ref_name);
3614 		if (s->head_ref_name == NULL) {
3615 			err = got_error_from_errno("strdup");
3616 			goto done;
3617 		}
3618 	}
3619 	s->start_id = got_object_id_dup(start_id);
3620 	if (s->start_id == NULL) {
3621 		err = got_error_from_errno("got_object_id_dup");
3622 		goto done;
3623 	}
3624 	s->log_branches = log_branches;
3625 	s->use_committer = 1;
3626 
3627 	STAILQ_INIT(&s->colors);
3628 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
3629 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
3630 		    get_color_value("TOG_COLOR_COMMIT"));
3631 		if (err)
3632 			goto done;
3633 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
3634 		    get_color_value("TOG_COLOR_AUTHOR"));
3635 		if (err) {
3636 			free_colors(&s->colors);
3637 			goto done;
3638 		}
3639 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
3640 		    get_color_value("TOG_COLOR_DATE"));
3641 		if (err) {
3642 			free_colors(&s->colors);
3643 			goto done;
3644 		}
3645 	}
3646 
3647 	view->show = show_log_view;
3648 	view->input = input_log_view;
3649 	view->resize = resize_log_view;
3650 	view->close = close_log_view;
3651 	view->search_start = search_start_log_view;
3652 	view->search_next = search_next_log_view;
3653 
3654 	if (s->thread_args.pack_fds == NULL) {
3655 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3656 		if (err)
3657 			goto done;
3658 	}
3659 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
3660 	    s->thread_args.pack_fds);
3661 	if (err)
3662 		goto done;
3663 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
3664 	    !s->log_branches);
3665 	if (err)
3666 		goto done;
3667 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
3668 	    s->repo, NULL, NULL);
3669 	if (err)
3670 		goto done;
3671 
3672 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
3673 	if (errcode) {
3674 		err = got_error_set_errno(errcode, "pthread_cond_init");
3675 		goto done;
3676 	}
3677 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
3678 	if (errcode) {
3679 		err = got_error_set_errno(errcode, "pthread_cond_init");
3680 		goto done;
3681 	}
3682 
3683 	s->thread_args.commits_needed = view->nlines;
3684 	s->thread_args.graph = thread_graph;
3685 	s->thread_args.real_commits = &s->real_commits;
3686 	s->thread_args.limit_commits = &s->limit_commits;
3687 	s->thread_args.in_repo_path = s->in_repo_path;
3688 	s->thread_args.start_id = s->start_id;
3689 	s->thread_args.repo = thread_repo;
3690 	s->thread_args.log_complete = 0;
3691 	s->thread_args.quit = &s->quit;
3692 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
3693 	s->thread_args.selected_entry = &s->selected_entry;
3694 	s->thread_args.searching = &view->searching;
3695 	s->thread_args.search_next_done = &view->search_next_done;
3696 	s->thread_args.regex = &view->regex;
3697 	s->thread_args.limiting = &s->limit_view;
3698 	s->thread_args.limit_regex = &s->limit_regex;
3699 	s->thread_args.limit_commits = &s->limit_commits;
3700 done:
3701 	if (err) {
3702 		if (view->close == NULL)
3703 			close_log_view(view);
3704 		view_close(view);
3705 	}
3706 	return err;
3707 }
3708 
3709 static const struct got_error *
3710 show_log_view(struct tog_view *view)
3711 {
3712 	const struct got_error *err;
3713 	struct tog_log_view_state *s = &view->state.log;
3714 
3715 	if (s->thread == 0) { //NULL) {
3716 		int errcode = pthread_create(&s->thread, NULL, log_thread,
3717 		    &s->thread_args);
3718 		if (errcode)
3719 			return got_error_set_errno(errcode, "pthread_create");
3720 		if (s->thread_args.commits_needed > 0) {
3721 			err = trigger_log_thread(view, 1);
3722 			if (err)
3723 				return err;
3724 		}
3725 	}
3726 
3727 	return draw_commits(view);
3728 }
3729 
3730 static void
3731 log_move_cursor_up(struct tog_view *view, int page, int home)
3732 {
3733 	struct tog_log_view_state *s = &view->state.log;
3734 
3735 	if (s->first_displayed_entry == NULL)
3736 		return;
3737 	if (s->selected_entry->idx == 0)
3738 		view->count = 0;
3739 
3740 	if ((page && TAILQ_FIRST(&s->commits->head) == s->first_displayed_entry)
3741 	    || home)
3742 		s->selected = home ? 0 : MAX(0, s->selected - page - 1);
3743 
3744 	if (!page && !home && s->selected > 0)
3745 		--s->selected;
3746 	else
3747 		log_scroll_up(s, home ? s->commits->ncommits : MAX(page, 1));
3748 
3749 	select_commit(s);
3750 	return;
3751 }
3752 
3753 static const struct got_error *
3754 log_move_cursor_down(struct tog_view *view, int page)
3755 {
3756 	struct tog_log_view_state	*s = &view->state.log;
3757 	const struct got_error		*err = NULL;
3758 	int				 eos = view->nlines - 2;
3759 
3760 	if (s->first_displayed_entry == NULL)
3761 		return NULL;
3762 
3763 	if (s->thread_args.log_complete &&
3764 	    s->selected_entry->idx >= s->commits->ncommits - 1)
3765 		return NULL;
3766 
3767 	if (view_is_hsplit_top(view))
3768 		--eos;  /* border consumes the last line */
3769 
3770 	if (!page) {
3771 		if (s->selected < MIN(eos, s->commits->ncommits - 1))
3772 			++s->selected;
3773 		else
3774 			err = log_scroll_down(view, 1);
3775 	} else if (s->thread_args.load_all && s->thread_args.log_complete) {
3776 		struct commit_queue_entry *entry;
3777 		int n;
3778 
3779 		s->selected = 0;
3780 		entry = TAILQ_LAST(&s->commits->head, commit_queue_head);
3781 		s->last_displayed_entry = entry;
3782 		for (n = 0; n <= eos; n++) {
3783 			if (entry == NULL)
3784 				break;
3785 			s->first_displayed_entry = entry;
3786 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
3787 		}
3788 		if (n > 0)
3789 			s->selected = n - 1;
3790 	} else {
3791 		if (s->last_displayed_entry->idx == s->commits->ncommits - 1 &&
3792 		    s->thread_args.log_complete)
3793 			s->selected += MIN(page,
3794 			    s->commits->ncommits - s->selected_entry->idx - 1);
3795 		else
3796 			err = log_scroll_down(view, page);
3797 	}
3798 	if (err)
3799 		return err;
3800 
3801 	/*
3802 	 * We might necessarily overshoot in horizontal
3803 	 * splits; if so, select the last displayed commit.
3804 	 */
3805 	if (s->first_displayed_entry && s->last_displayed_entry) {
3806 		s->selected = MIN(s->selected,
3807 		    s->last_displayed_entry->idx -
3808 		    s->first_displayed_entry->idx);
3809 	}
3810 
3811 	select_commit(s);
3812 
3813 	if (s->thread_args.log_complete &&
3814 	    s->selected_entry->idx == s->commits->ncommits - 1)
3815 		view->count = 0;
3816 
3817 	return NULL;
3818 }
3819 
3820 static void
3821 view_get_split(struct tog_view *view, int *y, int *x)
3822 {
3823 	*x = 0;
3824 	*y = 0;
3825 
3826 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
3827 		if (view->child && view->child->resized_y)
3828 			*y = view->child->resized_y;
3829 		else if (view->resized_y)
3830 			*y = view->resized_y;
3831 		else
3832 			*y = view_split_begin_y(view->lines);
3833 	} else if (view->mode == TOG_VIEW_SPLIT_VERT) {
3834 		if (view->child && view->child->resized_x)
3835 			*x = view->child->resized_x;
3836 		else if (view->resized_x)
3837 			*x = view->resized_x;
3838 		else
3839 			*x = view_split_begin_x(view->begin_x);
3840 	}
3841 }
3842 
3843 /* Split view horizontally at y and offset view->state->selected line. */
3844 static const struct got_error *
3845 view_init_hsplit(struct tog_view *view, int y)
3846 {
3847 	const struct got_error *err = NULL;
3848 
3849 	view->nlines = y;
3850 	view->ncols = COLS;
3851 	err = view_resize(view);
3852 	if (err)
3853 		return err;
3854 
3855 	err = offset_selection_down(view);
3856 
3857 	return err;
3858 }
3859 
3860 static const struct got_error *
3861 log_goto_line(struct tog_view *view, int nlines)
3862 {
3863 	const struct got_error		*err = NULL;
3864 	struct tog_log_view_state	*s = &view->state.log;
3865 	int				 g, idx = s->selected_entry->idx;
3866 
3867 	if (s->first_displayed_entry == NULL || s->last_displayed_entry == NULL)
3868 		return NULL;
3869 
3870 	g = view->gline;
3871 	view->gline = 0;
3872 
3873 	if (g >= s->first_displayed_entry->idx + 1 &&
3874 	    g <= s->last_displayed_entry->idx + 1 &&
3875 	    g - s->first_displayed_entry->idx - 1 < nlines) {
3876 		s->selected = g - s->first_displayed_entry->idx - 1;
3877 		select_commit(s);
3878 		return NULL;
3879 	}
3880 
3881 	if (idx + 1 < g) {
3882 		err = log_move_cursor_down(view, g - idx - 1);
3883 		if (!err && g > s->selected_entry->idx + 1)
3884 			err = log_move_cursor_down(view,
3885 			    g - s->first_displayed_entry->idx - 1);
3886 		if (err)
3887 			return err;
3888 	} else if (idx + 1 > g)
3889 		log_move_cursor_up(view, idx - g + 1, 0);
3890 
3891 	if (g < nlines && s->first_displayed_entry->idx == 0)
3892 		s->selected = g - 1;
3893 
3894 	select_commit(s);
3895 	return NULL;
3896 
3897 }
3898 
3899 static void
3900 horizontal_scroll_input(struct tog_view *view, int ch)
3901 {
3902 
3903 	switch (ch) {
3904 	case KEY_LEFT:
3905 	case 'h':
3906 		view->x -= MIN(view->x, 2);
3907 		if (view->x <= 0)
3908 			view->count = 0;
3909 		break;
3910 	case KEY_RIGHT:
3911 	case 'l':
3912 		if (view->x + view->ncols / 2 < view->maxx)
3913 			view->x += 2;
3914 		else
3915 			view->count = 0;
3916 		break;
3917 	case '0':
3918 		view->x = 0;
3919 		break;
3920 	case '$':
3921 		view->x = MAX(view->maxx - view->ncols / 2, 0);
3922 		view->count = 0;
3923 		break;
3924 	default:
3925 		break;
3926 	}
3927 }
3928 
3929 static const struct got_error *
3930 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
3931 {
3932 	const struct got_error *err = NULL;
3933 	struct tog_log_view_state *s = &view->state.log;
3934 	int eos, nscroll;
3935 
3936 	if (s->thread_args.load_all) {
3937 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
3938 			s->thread_args.load_all = 0;
3939 		else if (s->thread_args.log_complete) {
3940 			err = log_move_cursor_down(view, s->commits->ncommits);
3941 			s->thread_args.load_all = 0;
3942 		}
3943 		if (err)
3944 			return err;
3945 	}
3946 
3947 	eos = nscroll = view->nlines - 1;
3948 	if (view_is_hsplit_top(view))
3949 		--eos;  /* border */
3950 
3951 	if (view->gline)
3952 		return log_goto_line(view, eos);
3953 
3954 	switch (ch) {
3955 	case '&':
3956 		err = limit_log_view(view);
3957 		break;
3958 	case 'q':
3959 		s->quit = 1;
3960 		break;
3961 	case '0':
3962 	case '$':
3963 	case KEY_RIGHT:
3964 	case 'l':
3965 	case KEY_LEFT:
3966 	case 'h':
3967 		horizontal_scroll_input(view, ch);
3968 		break;
3969 	case 'k':
3970 	case KEY_UP:
3971 	case '<':
3972 	case ',':
3973 	case CTRL('p'):
3974 		log_move_cursor_up(view, 0, 0);
3975 		break;
3976 	case 'g':
3977 	case '=':
3978 	case KEY_HOME:
3979 		log_move_cursor_up(view, 0, 1);
3980 		view->count = 0;
3981 		break;
3982 	case CTRL('u'):
3983 	case 'u':
3984 		nscroll /= 2;
3985 		/* FALL THROUGH */
3986 	case KEY_PPAGE:
3987 	case CTRL('b'):
3988 	case 'b':
3989 		log_move_cursor_up(view, nscroll, 0);
3990 		break;
3991 	case 'j':
3992 	case KEY_DOWN:
3993 	case '>':
3994 	case '.':
3995 	case CTRL('n'):
3996 		err = log_move_cursor_down(view, 0);
3997 		break;
3998 	case '@':
3999 		s->use_committer = !s->use_committer;
4000 		view->action = s->use_committer ?
4001 		    "show committer" : "show commit author";
4002 		break;
4003 	case 'G':
4004 	case '*':
4005 	case KEY_END: {
4006 		/* We don't know yet how many commits, so we're forced to
4007 		 * traverse them all. */
4008 		view->count = 0;
4009 		s->thread_args.load_all = 1;
4010 		if (!s->thread_args.log_complete)
4011 			return trigger_log_thread(view, 0);
4012 		err = log_move_cursor_down(view, s->commits->ncommits);
4013 		s->thread_args.load_all = 0;
4014 		break;
4015 	}
4016 	case CTRL('d'):
4017 	case 'd':
4018 		nscroll /= 2;
4019 		/* FALL THROUGH */
4020 	case KEY_NPAGE:
4021 	case CTRL('f'):
4022 	case 'f':
4023 	case ' ':
4024 		err = log_move_cursor_down(view, nscroll);
4025 		break;
4026 	case KEY_RESIZE:
4027 		if (s->selected > view->nlines - 2)
4028 			s->selected = view->nlines - 2;
4029 		if (s->selected > s->commits->ncommits - 1)
4030 			s->selected = s->commits->ncommits - 1;
4031 		select_commit(s);
4032 		if (s->commits->ncommits < view->nlines - 1 &&
4033 		    !s->thread_args.log_complete) {
4034 			s->thread_args.commits_needed += (view->nlines - 1) -
4035 			    s->commits->ncommits;
4036 			err = trigger_log_thread(view, 1);
4037 		}
4038 		break;
4039 	case KEY_ENTER:
4040 	case '\r':
4041 		view->count = 0;
4042 		if (s->selected_entry == NULL)
4043 			break;
4044 		err = view_request_new(new_view, view, TOG_VIEW_DIFF);
4045 		break;
4046 	case 'T':
4047 		view->count = 0;
4048 		if (s->selected_entry == NULL)
4049 			break;
4050 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
4051 		break;
4052 	case KEY_BACKSPACE:
4053 	case CTRL('l'):
4054 	case 'B':
4055 		view->count = 0;
4056 		if (ch == KEY_BACKSPACE &&
4057 		    got_path_is_root_dir(s->in_repo_path))
4058 			break;
4059 		err = stop_log_thread(s);
4060 		if (err)
4061 			return err;
4062 		if (ch == KEY_BACKSPACE) {
4063 			char *parent_path;
4064 			err = got_path_dirname(&parent_path, s->in_repo_path);
4065 			if (err)
4066 				return err;
4067 			free(s->in_repo_path);
4068 			s->in_repo_path = parent_path;
4069 			s->thread_args.in_repo_path = s->in_repo_path;
4070 		} else if (ch == CTRL('l')) {
4071 			struct got_object_id *start_id;
4072 			err = got_repo_match_object_id(&start_id, NULL,
4073 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
4074 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
4075 			if (err) {
4076 				if (s->head_ref_name == NULL ||
4077 				    err->code != GOT_ERR_NOT_REF)
4078 					return err;
4079 				/* Try to cope with deleted references. */
4080 				free(s->head_ref_name);
4081 				s->head_ref_name = NULL;
4082 				err = got_repo_match_object_id(&start_id,
4083 				    NULL, GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT,
4084 				    &tog_refs, s->repo);
4085 				if (err)
4086 					return err;
4087 			}
4088 			free(s->start_id);
4089 			s->start_id = start_id;
4090 			s->thread_args.start_id = s->start_id;
4091 		} else /* 'B' */
4092 			s->log_branches = !s->log_branches;
4093 
4094 		if (s->thread_args.pack_fds == NULL) {
4095 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
4096 			if (err)
4097 				return err;
4098 		}
4099 		err = got_repo_open(&s->thread_args.repo,
4100 		    got_repo_get_path(s->repo), NULL,
4101 		    s->thread_args.pack_fds);
4102 		if (err)
4103 			return err;
4104 		tog_free_refs();
4105 		err = tog_load_refs(s->repo, 0);
4106 		if (err)
4107 			return err;
4108 		err = got_commit_graph_open(&s->thread_args.graph,
4109 		    s->in_repo_path, !s->log_branches);
4110 		if (err)
4111 			return err;
4112 		err = got_commit_graph_iter_start(s->thread_args.graph,
4113 		    s->start_id, s->repo, NULL, NULL);
4114 		if (err)
4115 			return err;
4116 		free_commits(&s->real_commits);
4117 		free_commits(&s->limit_commits);
4118 		s->first_displayed_entry = NULL;
4119 		s->last_displayed_entry = NULL;
4120 		s->selected_entry = NULL;
4121 		s->selected = 0;
4122 		s->thread_args.log_complete = 0;
4123 		s->quit = 0;
4124 		s->thread_args.commits_needed = view->lines;
4125 		s->matched_entry = NULL;
4126 		s->search_entry = NULL;
4127 		view->offset = 0;
4128 		break;
4129 	case 'R':
4130 		view->count = 0;
4131 		err = view_request_new(new_view, view, TOG_VIEW_REF);
4132 		break;
4133 	default:
4134 		view->count = 0;
4135 		break;
4136 	}
4137 
4138 	return err;
4139 }
4140 
4141 static const struct got_error *
4142 apply_unveil(const char *repo_path, const char *worktree_path)
4143 {
4144 	const struct got_error *error;
4145 
4146 #ifdef PROFILE
4147 	if (unveil("gmon.out", "rwc") != 0)
4148 		return got_error_from_errno2("unveil", "gmon.out");
4149 #endif
4150 	if (repo_path && unveil(repo_path, "r") != 0)
4151 		return got_error_from_errno2("unveil", repo_path);
4152 
4153 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
4154 		return got_error_from_errno2("unveil", worktree_path);
4155 
4156 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
4157 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
4158 
4159 	error = got_privsep_unveil_exec_helpers();
4160 	if (error != NULL)
4161 		return error;
4162 
4163 	if (unveil(NULL, NULL) != 0)
4164 		return got_error_from_errno("unveil");
4165 
4166 	return NULL;
4167 }
4168 
4169 static const struct got_error *
4170 init_mock_term(const char *test_script_path)
4171 {
4172 	const struct got_error	*err = NULL;
4173 
4174 	if (test_script_path == NULL || *test_script_path == '\0')
4175 		return got_error_msg(GOT_ERR_IO, "GOT_TOG_TEST not defined");
4176 
4177 	tog_io.f = fopen(test_script_path, "re");
4178 	if (tog_io.f == NULL) {
4179 		err = got_error_from_errno_fmt("fopen: %s",
4180 		    test_script_path);
4181 		goto done;
4182 	}
4183 
4184 	/* test mode, we don't want any output */
4185 	tog_io.cout = fopen("/dev/null", "w+");
4186 	if (tog_io.cout == NULL) {
4187 		err = got_error_from_errno("fopen: /dev/null");
4188 		goto done;
4189 	}
4190 
4191 	tog_io.cin = fopen("/dev/tty", "r+");
4192 	if (tog_io.cin == NULL) {
4193 		err = got_error_from_errno("fopen: /dev/tty");
4194 		goto done;
4195 	}
4196 
4197 	if (fseeko(tog_io.f, 0L, SEEK_SET) == -1) {
4198 		err = got_error_from_errno("fseeko");
4199 		goto done;
4200 	}
4201 
4202 	/* use local TERM so we test in different environments */
4203 	if (newterm(NULL, tog_io.cout, tog_io.cin) == NULL)
4204 		err = got_error_msg(GOT_ERR_IO,
4205 		    "newterm: failed to initialise curses");
4206 
4207 	using_mock_io = 1;
4208 done:
4209 	if (err)
4210 		tog_io_close();
4211 	return err;
4212 }
4213 
4214 static void
4215 init_curses(void)
4216 {
4217 	/*
4218 	 * Override default signal handlers before starting ncurses.
4219 	 * This should prevent ncurses from installing its own
4220 	 * broken cleanup() signal handler.
4221 	 */
4222 	signal(SIGWINCH, tog_sigwinch);
4223 	signal(SIGPIPE, tog_sigpipe);
4224 	signal(SIGCONT, tog_sigcont);
4225 	signal(SIGINT, tog_sigint);
4226 	signal(SIGTERM, tog_sigterm);
4227 
4228 	if (using_mock_io) /* In test mode we use a fake terminal */
4229 		return;
4230 
4231 	initscr();
4232 
4233 	cbreak();
4234 	halfdelay(1); /* Fast refresh while initial view is loading. */
4235 	noecho();
4236 	nonl();
4237 	intrflush(stdscr, FALSE);
4238 	keypad(stdscr, TRUE);
4239 	curs_set(0);
4240 	if (getenv("TOG_COLORS") != NULL) {
4241 		start_color();
4242 		use_default_colors();
4243 	}
4244 
4245 	return;
4246 }
4247 
4248 static const struct got_error *
4249 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
4250     struct got_repository *repo, struct got_worktree *worktree)
4251 {
4252 	const struct got_error *err = NULL;
4253 
4254 	if (argc == 0) {
4255 		*in_repo_path = strdup("/");
4256 		if (*in_repo_path == NULL)
4257 			return got_error_from_errno("strdup");
4258 		return NULL;
4259 	}
4260 
4261 	if (worktree) {
4262 		const char *prefix = got_worktree_get_path_prefix(worktree);
4263 		char *p;
4264 
4265 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
4266 		if (err)
4267 			return err;
4268 		if (asprintf(in_repo_path, "%s%s%s", prefix,
4269 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
4270 		    p) == -1) {
4271 			err = got_error_from_errno("asprintf");
4272 			*in_repo_path = NULL;
4273 		}
4274 		free(p);
4275 	} else
4276 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
4277 
4278 	return err;
4279 }
4280 
4281 static const struct got_error *
4282 cmd_log(int argc, char *argv[])
4283 {
4284 	const struct got_error *error;
4285 	struct got_repository *repo = NULL;
4286 	struct got_worktree *worktree = NULL;
4287 	struct got_object_id *start_id = NULL;
4288 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
4289 	char *start_commit = NULL, *label = NULL;
4290 	struct got_reference *ref = NULL;
4291 	const char *head_ref_name = NULL;
4292 	int ch, log_branches = 0;
4293 	struct tog_view *view;
4294 	int *pack_fds = NULL;
4295 
4296 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
4297 		switch (ch) {
4298 		case 'b':
4299 			log_branches = 1;
4300 			break;
4301 		case 'c':
4302 			start_commit = optarg;
4303 			break;
4304 		case 'r':
4305 			repo_path = realpath(optarg, NULL);
4306 			if (repo_path == NULL)
4307 				return got_error_from_errno2("realpath",
4308 				    optarg);
4309 			break;
4310 		default:
4311 			usage_log();
4312 			/* NOTREACHED */
4313 		}
4314 	}
4315 
4316 	argc -= optind;
4317 	argv += optind;
4318 
4319 	if (argc > 1)
4320 		usage_log();
4321 
4322 	error = got_repo_pack_fds_open(&pack_fds);
4323 	if (error != NULL)
4324 		goto done;
4325 
4326 	if (repo_path == NULL) {
4327 		cwd = getcwd(NULL, 0);
4328 		if (cwd == NULL)
4329 			return got_error_from_errno("getcwd");
4330 		error = got_worktree_open(&worktree, cwd);
4331 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4332 			goto done;
4333 		if (worktree)
4334 			repo_path =
4335 			    strdup(got_worktree_get_repo_path(worktree));
4336 		else
4337 			repo_path = strdup(cwd);
4338 		if (repo_path == NULL) {
4339 			error = got_error_from_errno("strdup");
4340 			goto done;
4341 		}
4342 	}
4343 
4344 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4345 	if (error != NULL)
4346 		goto done;
4347 
4348 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
4349 	    repo, worktree);
4350 	if (error)
4351 		goto done;
4352 
4353 	init_curses();
4354 
4355 	error = apply_unveil(got_repo_get_path(repo),
4356 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
4357 	if (error)
4358 		goto done;
4359 
4360 	/* already loaded by tog_log_with_path()? */
4361 	if (TAILQ_EMPTY(&tog_refs)) {
4362 		error = tog_load_refs(repo, 0);
4363 		if (error)
4364 			goto done;
4365 	}
4366 
4367 	if (start_commit == NULL) {
4368 		error = got_repo_match_object_id(&start_id, &label,
4369 		    worktree ? got_worktree_get_head_ref_name(worktree) :
4370 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
4371 		if (error)
4372 			goto done;
4373 		head_ref_name = label;
4374 	} else {
4375 		error = got_ref_open(&ref, repo, start_commit, 0);
4376 		if (error == NULL)
4377 			head_ref_name = got_ref_get_name(ref);
4378 		else if (error->code != GOT_ERR_NOT_REF)
4379 			goto done;
4380 		error = got_repo_match_object_id(&start_id, NULL,
4381 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
4382 		if (error)
4383 			goto done;
4384 	}
4385 
4386 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
4387 	if (view == NULL) {
4388 		error = got_error_from_errno("view_open");
4389 		goto done;
4390 	}
4391 	error = open_log_view(view, start_id, repo, head_ref_name,
4392 	    in_repo_path, log_branches);
4393 	if (error)
4394 		goto done;
4395 	if (worktree) {
4396 		/* Release work tree lock. */
4397 		got_worktree_close(worktree);
4398 		worktree = NULL;
4399 	}
4400 	error = view_loop(view);
4401 done:
4402 	free(in_repo_path);
4403 	free(repo_path);
4404 	free(cwd);
4405 	free(start_id);
4406 	free(label);
4407 	if (ref)
4408 		got_ref_close(ref);
4409 	if (repo) {
4410 		const struct got_error *close_err = got_repo_close(repo);
4411 		if (error == NULL)
4412 			error = close_err;
4413 	}
4414 	if (worktree)
4415 		got_worktree_close(worktree);
4416 	if (pack_fds) {
4417 		const struct got_error *pack_err =
4418 		    got_repo_pack_fds_close(pack_fds);
4419 		if (error == NULL)
4420 			error = pack_err;
4421 	}
4422 	tog_free_refs();
4423 	return error;
4424 }
4425 
4426 __dead static void
4427 usage_diff(void)
4428 {
4429 	endwin();
4430 	fprintf(stderr, "usage: %s diff [-aw] [-C number] [-r repository-path] "
4431 	    "object1 object2\n", getprogname());
4432 	exit(1);
4433 }
4434 
4435 static int
4436 match_line(const char *line, regex_t *regex, size_t nmatch,
4437     regmatch_t *regmatch)
4438 {
4439 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
4440 }
4441 
4442 static struct tog_color *
4443 match_color(struct tog_colors *colors, const char *line)
4444 {
4445 	struct tog_color *tc = NULL;
4446 
4447 	STAILQ_FOREACH(tc, colors, entry) {
4448 		if (match_line(line, &tc->regex, 0, NULL))
4449 			return tc;
4450 	}
4451 
4452 	return NULL;
4453 }
4454 
4455 static const struct got_error *
4456 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
4457     WINDOW *window, int skipcol, regmatch_t *regmatch)
4458 {
4459 	const struct got_error *err = NULL;
4460 	char *exstr = NULL;
4461 	wchar_t *wline = NULL;
4462 	int rme, rms, n, width, scrollx;
4463 	int width0 = 0, width1 = 0, width2 = 0;
4464 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
4465 
4466 	*wtotal = 0;
4467 
4468 	rms = regmatch->rm_so;
4469 	rme = regmatch->rm_eo;
4470 
4471 	err = expand_tab(&exstr, line);
4472 	if (err)
4473 		return err;
4474 
4475 	/* Split the line into 3 segments, according to match offsets. */
4476 	seg0 = strndup(exstr, rms);
4477 	if (seg0 == NULL) {
4478 		err = got_error_from_errno("strndup");
4479 		goto done;
4480 	}
4481 	seg1 = strndup(exstr + rms, rme - rms);
4482 	if (seg1 == NULL) {
4483 		err = got_error_from_errno("strndup");
4484 		goto done;
4485 	}
4486 	seg2 = strdup(exstr + rme);
4487 	if (seg2 == NULL) {
4488 		err = got_error_from_errno("strndup");
4489 		goto done;
4490 	}
4491 
4492 	/* draw up to matched token if we haven't scrolled past it */
4493 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
4494 	    col_tab_align, 1);
4495 	if (err)
4496 		goto done;
4497 	n = MAX(width0 - skipcol, 0);
4498 	if (n) {
4499 		free(wline);
4500 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
4501 		    wlimit, col_tab_align, 1);
4502 		if (err)
4503 			goto done;
4504 		waddwstr(window, &wline[scrollx]);
4505 		wlimit -= width;
4506 		*wtotal += width;
4507 	}
4508 
4509 	if (wlimit > 0) {
4510 		int i = 0, w = 0;
4511 		size_t wlen;
4512 
4513 		free(wline);
4514 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
4515 		    col_tab_align, 1);
4516 		if (err)
4517 			goto done;
4518 		wlen = wcslen(wline);
4519 		while (i < wlen) {
4520 			width = wcwidth(wline[i]);
4521 			if (width == -1) {
4522 				/* should not happen, tabs are expanded */
4523 				err = got_error(GOT_ERR_RANGE);
4524 				goto done;
4525 			}
4526 			if (width0 + w + width > skipcol)
4527 				break;
4528 			w += width;
4529 			i++;
4530 		}
4531 		/* draw (visible part of) matched token (if scrolled into it) */
4532 		if (width1 - w > 0) {
4533 			wattron(window, A_STANDOUT);
4534 			waddwstr(window, &wline[i]);
4535 			wattroff(window, A_STANDOUT);
4536 			wlimit -= (width1 - w);
4537 			*wtotal += (width1 - w);
4538 		}
4539 	}
4540 
4541 	if (wlimit > 0) {  /* draw rest of line */
4542 		free(wline);
4543 		if (skipcol > width0 + width1) {
4544 			err = format_line(&wline, &width2, &scrollx, seg2,
4545 			    skipcol - (width0 + width1), wlimit,
4546 			    col_tab_align, 1);
4547 			if (err)
4548 				goto done;
4549 			waddwstr(window, &wline[scrollx]);
4550 		} else {
4551 			err = format_line(&wline, &width2, NULL, seg2, 0,
4552 			    wlimit, col_tab_align, 1);
4553 			if (err)
4554 				goto done;
4555 			waddwstr(window, wline);
4556 		}
4557 		*wtotal += width2;
4558 	}
4559 done:
4560 	free(wline);
4561 	free(exstr);
4562 	free(seg0);
4563 	free(seg1);
4564 	free(seg2);
4565 	return err;
4566 }
4567 
4568 static int
4569 gotoline(struct tog_view *view, int *lineno, int *nprinted)
4570 {
4571 	FILE	*f = NULL;
4572 	int	*eof, *first, *selected;
4573 
4574 	if (view->type == TOG_VIEW_DIFF) {
4575 		struct tog_diff_view_state *s = &view->state.diff;
4576 
4577 		first = &s->first_displayed_line;
4578 		selected = first;
4579 		eof = &s->eof;
4580 		f = s->f;
4581 	} else if (view->type == TOG_VIEW_HELP) {
4582 		struct tog_help_view_state *s = &view->state.help;
4583 
4584 		first = &s->first_displayed_line;
4585 		selected = first;
4586 		eof = &s->eof;
4587 		f = s->f;
4588 	} else if (view->type == TOG_VIEW_BLAME) {
4589 		struct tog_blame_view_state *s = &view->state.blame;
4590 
4591 		first = &s->first_displayed_line;
4592 		selected = &s->selected_line;
4593 		eof = &s->eof;
4594 		f = s->blame.f;
4595 	} else
4596 		return 0;
4597 
4598 	/* Center gline in the middle of the page like vi(1). */
4599 	if (*lineno < view->gline - (view->nlines - 3) / 2)
4600 		return 0;
4601 	if (*first != 1 && (*lineno > view->gline - (view->nlines - 3) / 2)) {
4602 		rewind(f);
4603 		*eof = 0;
4604 		*first = 1;
4605 		*lineno = 0;
4606 		*nprinted = 0;
4607 		return 0;
4608 	}
4609 
4610 	*selected = view->gline <= (view->nlines - 3) / 2 ?
4611 		view->gline : (view->nlines - 3) / 2 + 1;
4612 	view->gline = 0;
4613 
4614 	return 1;
4615 }
4616 
4617 static const struct got_error *
4618 draw_file(struct tog_view *view, const char *header)
4619 {
4620 	struct tog_diff_view_state *s = &view->state.diff;
4621 	regmatch_t *regmatch = &view->regmatch;
4622 	const struct got_error *err;
4623 	int nprinted = 0;
4624 	char *line;
4625 	size_t linesize = 0;
4626 	ssize_t linelen;
4627 	wchar_t *wline;
4628 	int width;
4629 	int max_lines = view->nlines;
4630 	int nlines = s->nlines;
4631 	off_t line_offset;
4632 
4633 	s->lineno = s->first_displayed_line - 1;
4634 	line_offset = s->lines[s->first_displayed_line - 1].offset;
4635 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
4636 		return got_error_from_errno("fseek");
4637 
4638 	werase(view->window);
4639 
4640 	if (view->gline > s->nlines - 1)
4641 		view->gline = s->nlines - 1;
4642 
4643 	if (header) {
4644 		int ln = view->gline ? view->gline <= (view->nlines - 3) / 2 ?
4645 		    1 : view->gline - (view->nlines - 3) / 2 :
4646 		    s->lineno + s->selected_line;
4647 
4648 		if (asprintf(&line, "[%d/%d] %s", ln, nlines, header) == -1)
4649 			return got_error_from_errno("asprintf");
4650 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
4651 		    0, 0);
4652 		free(line);
4653 		if (err)
4654 			return err;
4655 
4656 		if (view_needs_focus_indication(view))
4657 			wstandout(view->window);
4658 		waddwstr(view->window, wline);
4659 		free(wline);
4660 		wline = NULL;
4661 		while (width++ < view->ncols)
4662 			waddch(view->window, ' ');
4663 		if (view_needs_focus_indication(view))
4664 			wstandend(view->window);
4665 
4666 		if (max_lines <= 1)
4667 			return NULL;
4668 		max_lines--;
4669 	}
4670 
4671 	s->eof = 0;
4672 	view->maxx = 0;
4673 	line = NULL;
4674 	while (max_lines > 0 && nprinted < max_lines) {
4675 		enum got_diff_line_type linetype;
4676 		attr_t attr = 0;
4677 
4678 		linelen = getline(&line, &linesize, s->f);
4679 		if (linelen == -1) {
4680 			if (feof(s->f)) {
4681 				s->eof = 1;
4682 				break;
4683 			}
4684 			free(line);
4685 			return got_ferror(s->f, GOT_ERR_IO);
4686 		}
4687 
4688 		if (++s->lineno < s->first_displayed_line)
4689 			continue;
4690 		if (view->gline && !gotoline(view, &s->lineno, &nprinted))
4691 			continue;
4692 		if (s->lineno == view->hiline)
4693 			attr = A_STANDOUT;
4694 
4695 		/* Set view->maxx based on full line length. */
4696 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
4697 		    view->x ? 1 : 0);
4698 		if (err) {
4699 			free(line);
4700 			return err;
4701 		}
4702 		view->maxx = MAX(view->maxx, width);
4703 		free(wline);
4704 		wline = NULL;
4705 
4706 		linetype = s->lines[s->lineno].type;
4707 		if (linetype > GOT_DIFF_LINE_LOGMSG &&
4708 		    linetype < GOT_DIFF_LINE_CONTEXT)
4709 			attr |= COLOR_PAIR(linetype);
4710 		if (attr)
4711 			wattron(view->window, attr);
4712 		if (s->first_displayed_line + nprinted == s->matched_line &&
4713 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
4714 			err = add_matched_line(&width, line, view->ncols, 0,
4715 			    view->window, view->x, regmatch);
4716 			if (err) {
4717 				free(line);
4718 				return err;
4719 			}
4720 		} else {
4721 			int skip;
4722 			err = format_line(&wline, &width, &skip, line,
4723 			    view->x, view->ncols, 0, view->x ? 1 : 0);
4724 			if (err) {
4725 				free(line);
4726 				return err;
4727 			}
4728 			waddwstr(view->window, &wline[skip]);
4729 			free(wline);
4730 			wline = NULL;
4731 		}
4732 		if (s->lineno == view->hiline) {
4733 			/* highlight full gline length */
4734 			while (width++ < view->ncols)
4735 				waddch(view->window, ' ');
4736 		} else {
4737 			if (width <= view->ncols - 1)
4738 				waddch(view->window, '\n');
4739 		}
4740 		if (attr)
4741 			wattroff(view->window, attr);
4742 		if (++nprinted == 1)
4743 			s->first_displayed_line = s->lineno;
4744 	}
4745 	free(line);
4746 	if (nprinted >= 1)
4747 		s->last_displayed_line = s->first_displayed_line +
4748 		    (nprinted - 1);
4749 	else
4750 		s->last_displayed_line = s->first_displayed_line;
4751 
4752 	view_border(view);
4753 
4754 	if (s->eof) {
4755 		while (nprinted < view->nlines) {
4756 			waddch(view->window, '\n');
4757 			nprinted++;
4758 		}
4759 
4760 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
4761 		    view->ncols, 0, 0);
4762 		if (err) {
4763 			return err;
4764 		}
4765 
4766 		wstandout(view->window);
4767 		waddwstr(view->window, wline);
4768 		free(wline);
4769 		wline = NULL;
4770 		wstandend(view->window);
4771 	}
4772 
4773 	return NULL;
4774 }
4775 
4776 static char *
4777 get_datestr(time_t *time, char *datebuf)
4778 {
4779 	struct tm mytm, *tm;
4780 	char *p, *s;
4781 
4782 	tm = gmtime_r(time, &mytm);
4783 	if (tm == NULL)
4784 		return NULL;
4785 	s = asctime_r(tm, datebuf);
4786 	if (s == NULL)
4787 		return NULL;
4788 	p = strchr(s, '\n');
4789 	if (p)
4790 		*p = '\0';
4791 	return s;
4792 }
4793 
4794 static const struct got_error *
4795 add_line_metadata(struct got_diff_line **lines, size_t *nlines,
4796     off_t off, uint8_t type)
4797 {
4798 	struct got_diff_line *p;
4799 
4800 	p = reallocarray(*lines, *nlines + 1, sizeof(**lines));
4801 	if (p == NULL)
4802 		return got_error_from_errno("reallocarray");
4803 	*lines = p;
4804 	(*lines)[*nlines].offset = off;
4805 	(*lines)[*nlines].type = type;
4806 	(*nlines)++;
4807 
4808 	return NULL;
4809 }
4810 
4811 static const struct got_error *
4812 cat_diff(FILE *dst, FILE *src, struct got_diff_line **d_lines, size_t *d_nlines,
4813     struct got_diff_line *s_lines, size_t s_nlines)
4814 {
4815 	struct got_diff_line	*p;
4816 	char			 buf[BUFSIZ];
4817 	size_t			 i, r;
4818 
4819 	if (fseeko(src, 0L, SEEK_SET) == -1)
4820 		return got_error_from_errno("fseeko");
4821 
4822 	for (;;) {
4823 		r = fread(buf, 1, sizeof(buf), src);
4824 		if (r == 0) {
4825 			if (ferror(src))
4826 				return got_error_from_errno("fread");
4827 			if (feof(src))
4828 				break;
4829 		}
4830 		if (fwrite(buf, 1, r, dst) != r)
4831 			return got_ferror(dst, GOT_ERR_IO);
4832 	}
4833 
4834 	if (s_nlines == 0 && *d_nlines == 0)
4835 		return NULL;
4836 
4837 	/*
4838 	 * If commit info was in dst, increment line offsets
4839 	 * of the appended diff content, but skip s_lines[0]
4840 	 * because offset zero is already in *d_lines.
4841 	 */
4842 	if (*d_nlines > 0) {
4843 		for (i = 1; i < s_nlines; ++i)
4844 			s_lines[i].offset += (*d_lines)[*d_nlines - 1].offset;
4845 
4846 		if (s_nlines > 0) {
4847 			--s_nlines;
4848 			++s_lines;
4849 		}
4850 	}
4851 
4852 	p = reallocarray(*d_lines, *d_nlines + s_nlines, sizeof(*p));
4853 	if (p == NULL) {
4854 		/* d_lines is freed in close_diff_view() */
4855 		return got_error_from_errno("reallocarray");
4856 	}
4857 
4858 	*d_lines = p;
4859 
4860 	memcpy(*d_lines + *d_nlines, s_lines, s_nlines * sizeof(*s_lines));
4861 	*d_nlines += s_nlines;
4862 
4863 	return NULL;
4864 }
4865 
4866 static const struct got_error *
4867 write_commit_info(struct got_diff_line **lines, size_t *nlines,
4868     struct got_object_id *commit_id, struct got_reflist_head *refs,
4869     struct got_repository *repo, int ignore_ws, int force_text_diff,
4870     struct got_diffstat_cb_arg *dsa, FILE *outfile)
4871 {
4872 	const struct got_error *err = NULL;
4873 	char datebuf[26], *datestr;
4874 	struct got_commit_object *commit;
4875 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
4876 	time_t committer_time;
4877 	const char *author, *committer;
4878 	char *refs_str = NULL;
4879 	struct got_pathlist_entry *pe;
4880 	off_t outoff = 0;
4881 	int n;
4882 
4883 	if (refs) {
4884 		err = build_refs_str(&refs_str, refs, commit_id, repo);
4885 		if (err)
4886 			return err;
4887 	}
4888 
4889 	err = got_object_open_as_commit(&commit, repo, commit_id);
4890 	if (err)
4891 		return err;
4892 
4893 	err = got_object_id_str(&id_str, commit_id);
4894 	if (err) {
4895 		err = got_error_from_errno("got_object_id_str");
4896 		goto done;
4897 	}
4898 
4899 	err = add_line_metadata(lines, nlines, 0, GOT_DIFF_LINE_NONE);
4900 	if (err)
4901 		goto done;
4902 
4903 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
4904 	    refs_str ? refs_str : "", refs_str ? ")" : "");
4905 	if (n < 0) {
4906 		err = got_error_from_errno("fprintf");
4907 		goto done;
4908 	}
4909 	outoff += n;
4910 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_META);
4911 	if (err)
4912 		goto done;
4913 
4914 	n = fprintf(outfile, "from: %s\n",
4915 	    got_object_commit_get_author(commit));
4916 	if (n < 0) {
4917 		err = got_error_from_errno("fprintf");
4918 		goto done;
4919 	}
4920 	outoff += n;
4921 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_AUTHOR);
4922 	if (err)
4923 		goto done;
4924 
4925 	author = got_object_commit_get_author(commit);
4926 	committer = got_object_commit_get_committer(commit);
4927 	if (strcmp(author, committer) != 0) {
4928 		n = fprintf(outfile, "via: %s\n", committer);
4929 		if (n < 0) {
4930 			err = got_error_from_errno("fprintf");
4931 			goto done;
4932 		}
4933 		outoff += n;
4934 		err = add_line_metadata(lines, nlines, outoff,
4935 		    GOT_DIFF_LINE_AUTHOR);
4936 		if (err)
4937 			goto done;
4938 	}
4939 	committer_time = got_object_commit_get_committer_time(commit);
4940 	datestr = get_datestr(&committer_time, datebuf);
4941 	if (datestr) {
4942 		n = fprintf(outfile, "date: %s UTC\n", datestr);
4943 		if (n < 0) {
4944 			err = got_error_from_errno("fprintf");
4945 			goto done;
4946 		}
4947 		outoff += n;
4948 		err = add_line_metadata(lines, nlines, outoff,
4949 		    GOT_DIFF_LINE_DATE);
4950 		if (err)
4951 			goto done;
4952 	}
4953 	if (got_object_commit_get_nparents(commit) > 1) {
4954 		const struct got_object_id_queue *parent_ids;
4955 		struct got_object_qid *qid;
4956 		int pn = 1;
4957 		parent_ids = got_object_commit_get_parent_ids(commit);
4958 		STAILQ_FOREACH(qid, parent_ids, entry) {
4959 			err = got_object_id_str(&id_str, &qid->id);
4960 			if (err)
4961 				goto done;
4962 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
4963 			if (n < 0) {
4964 				err = got_error_from_errno("fprintf");
4965 				goto done;
4966 			}
4967 			outoff += n;
4968 			err = add_line_metadata(lines, nlines, outoff,
4969 			    GOT_DIFF_LINE_META);
4970 			if (err)
4971 				goto done;
4972 			free(id_str);
4973 			id_str = NULL;
4974 		}
4975 	}
4976 
4977 	err = got_object_commit_get_logmsg(&logmsg, commit);
4978 	if (err)
4979 		goto done;
4980 	s = logmsg;
4981 	while ((line = strsep(&s, "\n")) != NULL) {
4982 		n = fprintf(outfile, "%s\n", line);
4983 		if (n < 0) {
4984 			err = got_error_from_errno("fprintf");
4985 			goto done;
4986 		}
4987 		outoff += n;
4988 		err = add_line_metadata(lines, nlines, outoff,
4989 		    GOT_DIFF_LINE_LOGMSG);
4990 		if (err)
4991 			goto done;
4992 	}
4993 
4994 	TAILQ_FOREACH(pe, dsa->paths, entry) {
4995 		struct got_diff_changed_path *cp = pe->data;
4996 		int pad = dsa->max_path_len - pe->path_len + 1;
4997 
4998 		n = fprintf(outfile, "%c  %s%*c | %*d+ %*d-\n", cp->status,
4999 		    pe->path, pad, ' ', dsa->add_cols + 1, cp->add,
5000 		    dsa->rm_cols + 1, cp->rm);
5001 		if (n < 0) {
5002 			err = got_error_from_errno("fprintf");
5003 			goto done;
5004 		}
5005 		outoff += n;
5006 		err = add_line_metadata(lines, nlines, outoff,
5007 		    GOT_DIFF_LINE_CHANGES);
5008 		if (err)
5009 			goto done;
5010 	}
5011 
5012 	fputc('\n', outfile);
5013 	outoff++;
5014 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
5015 	if (err)
5016 		goto done;
5017 
5018 	n = fprintf(outfile,
5019 	    "%d file%s changed, %d insertion%s(+), %d deletion%s(-)\n",
5020 	    dsa->nfiles, dsa->nfiles > 1 ? "s" : "", dsa->ins,
5021 	    dsa->ins != 1 ? "s" : "", dsa->del, dsa->del != 1 ? "s" : "");
5022 	if (n < 0) {
5023 		err = got_error_from_errno("fprintf");
5024 		goto done;
5025 	}
5026 	outoff += n;
5027 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
5028 	if (err)
5029 		goto done;
5030 
5031 	fputc('\n', outfile);
5032 	outoff++;
5033 	err = add_line_metadata(lines, nlines, outoff, GOT_DIFF_LINE_NONE);
5034 done:
5035 	free(id_str);
5036 	free(logmsg);
5037 	free(refs_str);
5038 	got_object_commit_close(commit);
5039 	if (err) {
5040 		free(*lines);
5041 		*lines = NULL;
5042 		*nlines = 0;
5043 	}
5044 	return err;
5045 }
5046 
5047 static const struct got_error *
5048 create_diff(struct tog_diff_view_state *s)
5049 {
5050 	const struct got_error *err = NULL;
5051 	FILE *f = NULL, *tmp_diff_file = NULL;
5052 	int obj_type;
5053 	struct got_diff_line *lines = NULL;
5054 	struct got_pathlist_head changed_paths;
5055 
5056 	TAILQ_INIT(&changed_paths);
5057 
5058 	free(s->lines);
5059 	s->lines = malloc(sizeof(*s->lines));
5060 	if (s->lines == NULL)
5061 		return got_error_from_errno("malloc");
5062 	s->nlines = 0;
5063 
5064 	f = got_opentemp();
5065 	if (f == NULL) {
5066 		err = got_error_from_errno("got_opentemp");
5067 		goto done;
5068 	}
5069 	tmp_diff_file = got_opentemp();
5070 	if (tmp_diff_file == NULL) {
5071 		err = got_error_from_errno("got_opentemp");
5072 		goto done;
5073 	}
5074 	if (s->f && fclose(s->f) == EOF) {
5075 		err = got_error_from_errno("fclose");
5076 		goto done;
5077 	}
5078 	s->f = f;
5079 
5080 	if (s->id1)
5081 		err = got_object_get_type(&obj_type, s->repo, s->id1);
5082 	else
5083 		err = got_object_get_type(&obj_type, s->repo, s->id2);
5084 	if (err)
5085 		goto done;
5086 
5087 	switch (obj_type) {
5088 	case GOT_OBJ_TYPE_BLOB:
5089 		err = got_diff_objects_as_blobs(&s->lines, &s->nlines,
5090 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
5091 		    s->label1, s->label2, tog_diff_algo, s->diff_context,
5092 		    s->ignore_whitespace, s->force_text_diff, NULL, s->repo,
5093 		    s->f);
5094 		break;
5095 	case GOT_OBJ_TYPE_TREE:
5096 		err = got_diff_objects_as_trees(&s->lines, &s->nlines,
5097 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
5098 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
5099 		    s->force_text_diff, NULL, s->repo, s->f);
5100 		break;
5101 	case GOT_OBJ_TYPE_COMMIT: {
5102 		const struct got_object_id_queue *parent_ids;
5103 		struct got_object_qid *pid;
5104 		struct got_commit_object *commit2;
5105 		struct got_reflist_head *refs;
5106 		size_t nlines = 0;
5107 		struct got_diffstat_cb_arg dsa = {
5108 			0, 0, 0, 0, 0, 0,
5109 			&changed_paths,
5110 			s->ignore_whitespace,
5111 			s->force_text_diff,
5112 			tog_diff_algo
5113 		};
5114 
5115 		lines = malloc(sizeof(*lines));
5116 		if (lines == NULL) {
5117 			err = got_error_from_errno("malloc");
5118 			goto done;
5119 		}
5120 
5121 		/* build diff first in tmp file then append to commit info */
5122 		err = got_diff_objects_as_commits(&lines, &nlines,
5123 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
5124 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
5125 		    s->force_text_diff, &dsa, s->repo, tmp_diff_file);
5126 		if (err)
5127 			break;
5128 
5129 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
5130 		if (err)
5131 			goto done;
5132 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
5133 		/* Show commit info if we're diffing to a parent/root commit. */
5134 		if (s->id1 == NULL) {
5135 			err = write_commit_info(&s->lines, &s->nlines, s->id2,
5136 			    refs, s->repo, s->ignore_whitespace,
5137 			    s->force_text_diff, &dsa, s->f);
5138 			if (err)
5139 				goto done;
5140 		} else {
5141 			parent_ids = got_object_commit_get_parent_ids(commit2);
5142 			STAILQ_FOREACH(pid, parent_ids, entry) {
5143 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
5144 					err = write_commit_info(&s->lines,
5145 					    &s->nlines, s->id2, refs, s->repo,
5146 					    s->ignore_whitespace,
5147 					    s->force_text_diff, &dsa, s->f);
5148 					if (err)
5149 						goto done;
5150 					break;
5151 				}
5152 			}
5153 		}
5154 		got_object_commit_close(commit2);
5155 
5156 		err = cat_diff(s->f, tmp_diff_file, &s->lines, &s->nlines,
5157 		    lines, nlines);
5158 		break;
5159 	}
5160 	default:
5161 		err = got_error(GOT_ERR_OBJ_TYPE);
5162 		break;
5163 	}
5164 done:
5165 	free(lines);
5166 	got_pathlist_free(&changed_paths, GOT_PATHLIST_FREE_ALL);
5167 	if (s->f && fflush(s->f) != 0 && err == NULL)
5168 		err = got_error_from_errno("fflush");
5169 	if (tmp_diff_file && fclose(tmp_diff_file) == EOF && err == NULL)
5170 		err = got_error_from_errno("fclose");
5171 	return err;
5172 }
5173 
5174 static void
5175 diff_view_indicate_progress(struct tog_view *view)
5176 {
5177 	mvwaddstr(view->window, 0, 0, "diffing...");
5178 	update_panels();
5179 	doupdate();
5180 }
5181 
5182 static const struct got_error *
5183 search_start_diff_view(struct tog_view *view)
5184 {
5185 	struct tog_diff_view_state *s = &view->state.diff;
5186 
5187 	s->matched_line = 0;
5188 	return NULL;
5189 }
5190 
5191 static void
5192 search_setup_diff_view(struct tog_view *view, FILE **f, off_t **line_offsets,
5193     size_t *nlines, int **first, int **last, int **match, int **selected)
5194 {
5195 	struct tog_diff_view_state *s = &view->state.diff;
5196 
5197 	*f = s->f;
5198 	*nlines = s->nlines;
5199 	*line_offsets = NULL;
5200 	*match = &s->matched_line;
5201 	*first = &s->first_displayed_line;
5202 	*last = &s->last_displayed_line;
5203 	*selected = &s->selected_line;
5204 }
5205 
5206 static const struct got_error *
5207 search_next_view_match(struct tog_view *view)
5208 {
5209 	const struct got_error *err = NULL;
5210 	FILE *f;
5211 	int lineno;
5212 	char *line = NULL;
5213 	size_t linesize = 0;
5214 	ssize_t linelen;
5215 	off_t *line_offsets;
5216 	size_t nlines = 0;
5217 	int *first, *last, *match, *selected;
5218 
5219 	if (!view->search_setup)
5220 		return got_error_msg(GOT_ERR_NOT_IMPL,
5221 		    "view search not supported");
5222 	view->search_setup(view, &f, &line_offsets, &nlines, &first, &last,
5223 	    &match, &selected);
5224 
5225 	if (!view->searching) {
5226 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5227 		return NULL;
5228 	}
5229 
5230 	if (*match) {
5231 		if (view->searching == TOG_SEARCH_FORWARD)
5232 			lineno = *first + 1;
5233 		else
5234 			lineno = *first - 1;
5235 	} else
5236 		lineno = *first - 1 + *selected;
5237 
5238 	while (1) {
5239 		off_t offset;
5240 
5241 		if (lineno <= 0 || lineno > nlines) {
5242 			if (*match == 0) {
5243 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5244 				break;
5245 			}
5246 
5247 			if (view->searching == TOG_SEARCH_FORWARD)
5248 				lineno = 1;
5249 			else
5250 				lineno = nlines;
5251 		}
5252 
5253 		offset = view->type == TOG_VIEW_DIFF ?
5254 		    view->state.diff.lines[lineno - 1].offset :
5255 		    line_offsets[lineno - 1];
5256 		if (fseeko(f, offset, SEEK_SET) != 0) {
5257 			free(line);
5258 			return got_error_from_errno("fseeko");
5259 		}
5260 		linelen = getline(&line, &linesize, f);
5261 		if (linelen != -1) {
5262 			char *exstr;
5263 			err = expand_tab(&exstr, line);
5264 			if (err)
5265 				break;
5266 			if (match_line(exstr, &view->regex, 1,
5267 			    &view->regmatch)) {
5268 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5269 				*match = lineno;
5270 				free(exstr);
5271 				break;
5272 			}
5273 			free(exstr);
5274 		}
5275 		if (view->searching == TOG_SEARCH_FORWARD)
5276 			lineno++;
5277 		else
5278 			lineno--;
5279 	}
5280 	free(line);
5281 
5282 	if (*match) {
5283 		*first = *match;
5284 		*selected = 1;
5285 	}
5286 
5287 	return err;
5288 }
5289 
5290 static const struct got_error *
5291 close_diff_view(struct tog_view *view)
5292 {
5293 	const struct got_error *err = NULL;
5294 	struct tog_diff_view_state *s = &view->state.diff;
5295 
5296 	free(s->id1);
5297 	s->id1 = NULL;
5298 	free(s->id2);
5299 	s->id2 = NULL;
5300 	if (s->f && fclose(s->f) == EOF)
5301 		err = got_error_from_errno("fclose");
5302 	s->f = NULL;
5303 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
5304 		err = got_error_from_errno("fclose");
5305 	s->f1 = NULL;
5306 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
5307 		err = got_error_from_errno("fclose");
5308 	s->f2 = NULL;
5309 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
5310 		err = got_error_from_errno("close");
5311 	s->fd1 = -1;
5312 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
5313 		err = got_error_from_errno("close");
5314 	s->fd2 = -1;
5315 	free(s->lines);
5316 	s->lines = NULL;
5317 	s->nlines = 0;
5318 	return err;
5319 }
5320 
5321 static const struct got_error *
5322 open_diff_view(struct tog_view *view, struct got_object_id *id1,
5323     struct got_object_id *id2, const char *label1, const char *label2,
5324     int diff_context, int ignore_whitespace, int force_text_diff,
5325     struct tog_view *parent_view, struct got_repository *repo)
5326 {
5327 	const struct got_error *err;
5328 	struct tog_diff_view_state *s = &view->state.diff;
5329 
5330 	memset(s, 0, sizeof(*s));
5331 	s->fd1 = -1;
5332 	s->fd2 = -1;
5333 
5334 	if (id1 != NULL && id2 != NULL) {
5335 		int type1, type2;
5336 
5337 		err = got_object_get_type(&type1, repo, id1);
5338 		if (err)
5339 			goto done;
5340 		err = got_object_get_type(&type2, repo, id2);
5341 		if (err)
5342 			goto done;
5343 
5344 		if (type1 != type2) {
5345 			err = got_error(GOT_ERR_OBJ_TYPE);
5346 			goto done;
5347 		}
5348 	}
5349 	s->first_displayed_line = 1;
5350 	s->last_displayed_line = view->nlines;
5351 	s->selected_line = 1;
5352 	s->repo = repo;
5353 	s->id1 = id1;
5354 	s->id2 = id2;
5355 	s->label1 = label1;
5356 	s->label2 = label2;
5357 
5358 	if (id1) {
5359 		s->id1 = got_object_id_dup(id1);
5360 		if (s->id1 == NULL) {
5361 			err = got_error_from_errno("got_object_id_dup");
5362 			goto done;
5363 		}
5364 	} else
5365 		s->id1 = NULL;
5366 
5367 	s->id2 = got_object_id_dup(id2);
5368 	if (s->id2 == NULL) {
5369 		err = got_error_from_errno("got_object_id_dup");
5370 		goto done;
5371 	}
5372 
5373 	s->f1 = got_opentemp();
5374 	if (s->f1 == NULL) {
5375 		err = got_error_from_errno("got_opentemp");
5376 		goto done;
5377 	}
5378 
5379 	s->f2 = got_opentemp();
5380 	if (s->f2 == NULL) {
5381 		err = got_error_from_errno("got_opentemp");
5382 		goto done;
5383 	}
5384 
5385 	s->fd1 = got_opentempfd();
5386 	if (s->fd1 == -1) {
5387 		err = got_error_from_errno("got_opentempfd");
5388 		goto done;
5389 	}
5390 
5391 	s->fd2 = got_opentempfd();
5392 	if (s->fd2 == -1) {
5393 		err = got_error_from_errno("got_opentempfd");
5394 		goto done;
5395 	}
5396 
5397 	s->diff_context = diff_context;
5398 	s->ignore_whitespace = ignore_whitespace;
5399 	s->force_text_diff = force_text_diff;
5400 	s->parent_view = parent_view;
5401 	s->repo = repo;
5402 
5403 	if (has_colors() && getenv("TOG_COLORS") != NULL && !using_mock_io) {
5404 		int rc;
5405 
5406 		rc = init_pair(GOT_DIFF_LINE_MINUS,
5407 		    get_color_value("TOG_COLOR_DIFF_MINUS"), -1);
5408 		if (rc != ERR)
5409 			rc = init_pair(GOT_DIFF_LINE_PLUS,
5410 			    get_color_value("TOG_COLOR_DIFF_PLUS"), -1);
5411 		if (rc != ERR)
5412 			rc = init_pair(GOT_DIFF_LINE_HUNK,
5413 			    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"), -1);
5414 		if (rc != ERR)
5415 			rc = init_pair(GOT_DIFF_LINE_META,
5416 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5417 		if (rc != ERR)
5418 			rc = init_pair(GOT_DIFF_LINE_CHANGES,
5419 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5420 		if (rc != ERR)
5421 			rc = init_pair(GOT_DIFF_LINE_BLOB_MIN,
5422 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5423 		if (rc != ERR)
5424 			rc = init_pair(GOT_DIFF_LINE_BLOB_PLUS,
5425 			    get_color_value("TOG_COLOR_DIFF_META"), -1);
5426 		if (rc != ERR)
5427 			rc = init_pair(GOT_DIFF_LINE_AUTHOR,
5428 			    get_color_value("TOG_COLOR_AUTHOR"), -1);
5429 		if (rc != ERR)
5430 			rc = init_pair(GOT_DIFF_LINE_DATE,
5431 			    get_color_value("TOG_COLOR_DATE"), -1);
5432 		if (rc == ERR) {
5433 			err = got_error(GOT_ERR_RANGE);
5434 			goto done;
5435 		}
5436 	}
5437 
5438 	if (parent_view && parent_view->type == TOG_VIEW_LOG &&
5439 	    view_is_splitscreen(view))
5440 		show_log_view(parent_view); /* draw border */
5441 	diff_view_indicate_progress(view);
5442 
5443 	err = create_diff(s);
5444 
5445 	view->show = show_diff_view;
5446 	view->input = input_diff_view;
5447 	view->reset = reset_diff_view;
5448 	view->close = close_diff_view;
5449 	view->search_start = search_start_diff_view;
5450 	view->search_setup = search_setup_diff_view;
5451 	view->search_next = search_next_view_match;
5452 done:
5453 	if (err) {
5454 		if (view->close == NULL)
5455 			close_diff_view(view);
5456 		view_close(view);
5457 	}
5458 	return err;
5459 }
5460 
5461 static const struct got_error *
5462 show_diff_view(struct tog_view *view)
5463 {
5464 	const struct got_error *err;
5465 	struct tog_diff_view_state *s = &view->state.diff;
5466 	char *id_str1 = NULL, *id_str2, *header;
5467 	const char *label1, *label2;
5468 
5469 	if (s->id1) {
5470 		err = got_object_id_str(&id_str1, s->id1);
5471 		if (err)
5472 			return err;
5473 		label1 = s->label1 ? s->label1 : id_str1;
5474 	} else
5475 		label1 = "/dev/null";
5476 
5477 	err = got_object_id_str(&id_str2, s->id2);
5478 	if (err)
5479 		return err;
5480 	label2 = s->label2 ? s->label2 : id_str2;
5481 
5482 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
5483 		err = got_error_from_errno("asprintf");
5484 		free(id_str1);
5485 		free(id_str2);
5486 		return err;
5487 	}
5488 	free(id_str1);
5489 	free(id_str2);
5490 
5491 	err = draw_file(view, header);
5492 	free(header);
5493 	return err;
5494 }
5495 
5496 static const struct got_error *
5497 set_selected_commit(struct tog_diff_view_state *s,
5498     struct commit_queue_entry *entry)
5499 {
5500 	const struct got_error *err;
5501 	const struct got_object_id_queue *parent_ids;
5502 	struct got_commit_object *selected_commit;
5503 	struct got_object_qid *pid;
5504 
5505 	free(s->id2);
5506 	s->id2 = got_object_id_dup(entry->id);
5507 	if (s->id2 == NULL)
5508 		return got_error_from_errno("got_object_id_dup");
5509 
5510 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
5511 	if (err)
5512 		return err;
5513 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
5514 	free(s->id1);
5515 	pid = STAILQ_FIRST(parent_ids);
5516 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
5517 	got_object_commit_close(selected_commit);
5518 	return NULL;
5519 }
5520 
5521 static const struct got_error *
5522 reset_diff_view(struct tog_view *view)
5523 {
5524 	struct tog_diff_view_state *s = &view->state.diff;
5525 
5526 	view->count = 0;
5527 	wclear(view->window);
5528 	s->first_displayed_line = 1;
5529 	s->last_displayed_line = view->nlines;
5530 	s->matched_line = 0;
5531 	diff_view_indicate_progress(view);
5532 	return create_diff(s);
5533 }
5534 
5535 static void
5536 diff_prev_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
5537 {
5538 	int start, i;
5539 
5540 	i = start = s->first_displayed_line - 1;
5541 
5542 	while (s->lines[i].type != type) {
5543 		if (i == 0)
5544 			i = s->nlines - 1;
5545 		if (--i == start)
5546 			return; /* do nothing, requested type not in file */
5547 	}
5548 
5549 	s->selected_line = 1;
5550 	s->first_displayed_line = i;
5551 }
5552 
5553 static void
5554 diff_next_index(struct tog_diff_view_state *s, enum got_diff_line_type type)
5555 {
5556 	int start, i;
5557 
5558 	i = start = s->first_displayed_line + 1;
5559 
5560 	while (s->lines[i].type != type) {
5561 		if (i == s->nlines - 1)
5562 			i = 0;
5563 		if (++i == start)
5564 			return; /* do nothing, requested type not in file */
5565 	}
5566 
5567 	s->selected_line = 1;
5568 	s->first_displayed_line = i;
5569 }
5570 
5571 static struct got_object_id *get_selected_commit_id(struct tog_blame_line *,
5572     int, int, int);
5573 static struct got_object_id *get_annotation_for_line(struct tog_blame_line *,
5574     int, int);
5575 
5576 static const struct got_error *
5577 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
5578 {
5579 	const struct got_error *err = NULL;
5580 	struct tog_diff_view_state *s = &view->state.diff;
5581 	struct tog_log_view_state *ls;
5582 	struct commit_queue_entry *old_selected_entry;
5583 	char *line = NULL;
5584 	size_t linesize = 0;
5585 	ssize_t linelen;
5586 	int i, nscroll = view->nlines - 1, up = 0;
5587 
5588 	s->lineno = s->first_displayed_line - 1 + s->selected_line;
5589 
5590 	switch (ch) {
5591 	case '0':
5592 	case '$':
5593 	case KEY_RIGHT:
5594 	case 'l':
5595 	case KEY_LEFT:
5596 	case 'h':
5597 		horizontal_scroll_input(view, ch);
5598 		break;
5599 	case 'a':
5600 	case 'w':
5601 		if (ch == 'a') {
5602 			s->force_text_diff = !s->force_text_diff;
5603 			view->action = s->force_text_diff ?
5604 			    "force ASCII text enabled" :
5605 			    "force ASCII text disabled";
5606 		}
5607 		else if (ch == 'w') {
5608 			s->ignore_whitespace = !s->ignore_whitespace;
5609 			view->action = s->ignore_whitespace ?
5610 			    "ignore whitespace enabled" :
5611 			    "ignore whitespace disabled";
5612 		}
5613 		err = reset_diff_view(view);
5614 		break;
5615 	case 'g':
5616 	case KEY_HOME:
5617 		s->first_displayed_line = 1;
5618 		view->count = 0;
5619 		break;
5620 	case 'G':
5621 	case KEY_END:
5622 		view->count = 0;
5623 		if (s->eof)
5624 			break;
5625 
5626 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
5627 		s->eof = 1;
5628 		break;
5629 	case 'k':
5630 	case KEY_UP:
5631 	case CTRL('p'):
5632 		if (s->first_displayed_line > 1)
5633 			s->first_displayed_line--;
5634 		else
5635 			view->count = 0;
5636 		break;
5637 	case CTRL('u'):
5638 	case 'u':
5639 		nscroll /= 2;
5640 		/* FALL THROUGH */
5641 	case KEY_PPAGE:
5642 	case CTRL('b'):
5643 	case 'b':
5644 		if (s->first_displayed_line == 1) {
5645 			view->count = 0;
5646 			break;
5647 		}
5648 		i = 0;
5649 		while (i++ < nscroll && s->first_displayed_line > 1)
5650 			s->first_displayed_line--;
5651 		break;
5652 	case 'j':
5653 	case KEY_DOWN:
5654 	case CTRL('n'):
5655 		if (!s->eof)
5656 			s->first_displayed_line++;
5657 		else
5658 			view->count = 0;
5659 		break;
5660 	case CTRL('d'):
5661 	case 'd':
5662 		nscroll /= 2;
5663 		/* FALL THROUGH */
5664 	case KEY_NPAGE:
5665 	case CTRL('f'):
5666 	case 'f':
5667 	case ' ':
5668 		if (s->eof) {
5669 			view->count = 0;
5670 			break;
5671 		}
5672 		i = 0;
5673 		while (!s->eof && i++ < nscroll) {
5674 			linelen = getline(&line, &linesize, s->f);
5675 			s->first_displayed_line++;
5676 			if (linelen == -1) {
5677 				if (feof(s->f)) {
5678 					s->eof = 1;
5679 				} else
5680 					err = got_ferror(s->f, GOT_ERR_IO);
5681 				break;
5682 			}
5683 		}
5684 		free(line);
5685 		break;
5686 	case '(':
5687 		diff_prev_index(s, GOT_DIFF_LINE_BLOB_MIN);
5688 		break;
5689 	case ')':
5690 		diff_next_index(s, GOT_DIFF_LINE_BLOB_MIN);
5691 		break;
5692 	case '{':
5693 		diff_prev_index(s, GOT_DIFF_LINE_HUNK);
5694 		break;
5695 	case '}':
5696 		diff_next_index(s, GOT_DIFF_LINE_HUNK);
5697 		break;
5698 	case '[':
5699 		if (s->diff_context > 0) {
5700 			s->diff_context--;
5701 			s->matched_line = 0;
5702 			diff_view_indicate_progress(view);
5703 			err = create_diff(s);
5704 			if (s->first_displayed_line + view->nlines - 1 >
5705 			    s->nlines) {
5706 				s->first_displayed_line = 1;
5707 				s->last_displayed_line = view->nlines;
5708 			}
5709 		} else
5710 			view->count = 0;
5711 		break;
5712 	case ']':
5713 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
5714 			s->diff_context++;
5715 			s->matched_line = 0;
5716 			diff_view_indicate_progress(view);
5717 			err = create_diff(s);
5718 		} else
5719 			view->count = 0;
5720 		break;
5721 	case '<':
5722 	case ',':
5723 	case 'K':
5724 		up = 1;
5725 		/* FALL THROUGH */
5726 	case '>':
5727 	case '.':
5728 	case 'J':
5729 		if (s->parent_view == NULL) {
5730 			view->count = 0;
5731 			break;
5732 		}
5733 		s->parent_view->count = view->count;
5734 
5735 		if (s->parent_view->type == TOG_VIEW_LOG) {
5736 			ls = &s->parent_view->state.log;
5737 			old_selected_entry = ls->selected_entry;
5738 
5739 			err = input_log_view(NULL, s->parent_view,
5740 			    up ? KEY_UP : KEY_DOWN);
5741 			if (err)
5742 				break;
5743 			view->count = s->parent_view->count;
5744 
5745 			if (old_selected_entry == ls->selected_entry)
5746 				break;
5747 
5748 			err = set_selected_commit(s, ls->selected_entry);
5749 			if (err)
5750 				break;
5751 		} else if (s->parent_view->type == TOG_VIEW_BLAME) {
5752 			struct tog_blame_view_state *bs;
5753 			struct got_object_id *id, *prev_id;
5754 
5755 			bs = &s->parent_view->state.blame;
5756 			prev_id = get_annotation_for_line(bs->blame.lines,
5757 			    bs->blame.nlines, bs->last_diffed_line);
5758 
5759 			err = input_blame_view(&view, s->parent_view,
5760 			    up ? KEY_UP : KEY_DOWN);
5761 			if (err)
5762 				break;
5763 			view->count = s->parent_view->count;
5764 
5765 			if (prev_id == NULL)
5766 				break;
5767 			id = get_selected_commit_id(bs->blame.lines,
5768 			    bs->blame.nlines, bs->first_displayed_line,
5769 			    bs->selected_line);
5770 			if (id == NULL)
5771 				break;
5772 
5773 			if (!got_object_id_cmp(prev_id, id))
5774 				break;
5775 
5776 			err = input_blame_view(&view, s->parent_view, KEY_ENTER);
5777 			if (err)
5778 				break;
5779 		}
5780 		s->first_displayed_line = 1;
5781 		s->last_displayed_line = view->nlines;
5782 		s->matched_line = 0;
5783 		view->x = 0;
5784 
5785 		diff_view_indicate_progress(view);
5786 		err = create_diff(s);
5787 		break;
5788 	default:
5789 		view->count = 0;
5790 		break;
5791 	}
5792 
5793 	return err;
5794 }
5795 
5796 static const struct got_error *
5797 cmd_diff(int argc, char *argv[])
5798 {
5799 	const struct got_error *error;
5800 	struct got_repository *repo = NULL;
5801 	struct got_worktree *worktree = NULL;
5802 	struct got_object_id *id1 = NULL, *id2 = NULL;
5803 	char *repo_path = NULL, *cwd = NULL;
5804 	char *id_str1 = NULL, *id_str2 = NULL;
5805 	char *label1 = NULL, *label2 = NULL;
5806 	int diff_context = 3, ignore_whitespace = 0;
5807 	int ch, force_text_diff = 0;
5808 	const char *errstr;
5809 	struct tog_view *view;
5810 	int *pack_fds = NULL;
5811 
5812 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
5813 		switch (ch) {
5814 		case 'a':
5815 			force_text_diff = 1;
5816 			break;
5817 		case 'C':
5818 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
5819 			    &errstr);
5820 			if (errstr != NULL)
5821 				errx(1, "number of context lines is %s: %s",
5822 				    errstr, errstr);
5823 			break;
5824 		case 'r':
5825 			repo_path = realpath(optarg, NULL);
5826 			if (repo_path == NULL)
5827 				return got_error_from_errno2("realpath",
5828 				    optarg);
5829 			got_path_strip_trailing_slashes(repo_path);
5830 			break;
5831 		case 'w':
5832 			ignore_whitespace = 1;
5833 			break;
5834 		default:
5835 			usage_diff();
5836 			/* NOTREACHED */
5837 		}
5838 	}
5839 
5840 	argc -= optind;
5841 	argv += optind;
5842 
5843 	if (argc == 0) {
5844 		usage_diff(); /* TODO show local worktree changes */
5845 	} else if (argc == 2) {
5846 		id_str1 = argv[0];
5847 		id_str2 = argv[1];
5848 	} else
5849 		usage_diff();
5850 
5851 	error = got_repo_pack_fds_open(&pack_fds);
5852 	if (error)
5853 		goto done;
5854 
5855 	if (repo_path == NULL) {
5856 		cwd = getcwd(NULL, 0);
5857 		if (cwd == NULL)
5858 			return got_error_from_errno("getcwd");
5859 		error = got_worktree_open(&worktree, cwd);
5860 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
5861 			goto done;
5862 		if (worktree)
5863 			repo_path =
5864 			    strdup(got_worktree_get_repo_path(worktree));
5865 		else
5866 			repo_path = strdup(cwd);
5867 		if (repo_path == NULL) {
5868 			error = got_error_from_errno("strdup");
5869 			goto done;
5870 		}
5871 	}
5872 
5873 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
5874 	if (error)
5875 		goto done;
5876 
5877 	init_curses();
5878 
5879 	error = apply_unveil(got_repo_get_path(repo), NULL);
5880 	if (error)
5881 		goto done;
5882 
5883 	error = tog_load_refs(repo, 0);
5884 	if (error)
5885 		goto done;
5886 
5887 	error = got_repo_match_object_id(&id1, &label1, id_str1,
5888 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5889 	if (error)
5890 		goto done;
5891 
5892 	error = got_repo_match_object_id(&id2, &label2, id_str2,
5893 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5894 	if (error)
5895 		goto done;
5896 
5897 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
5898 	if (view == NULL) {
5899 		error = got_error_from_errno("view_open");
5900 		goto done;
5901 	}
5902 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
5903 	    ignore_whitespace, force_text_diff, NULL,  repo);
5904 	if (error)
5905 		goto done;
5906 	error = view_loop(view);
5907 done:
5908 	free(label1);
5909 	free(label2);
5910 	free(repo_path);
5911 	free(cwd);
5912 	if (repo) {
5913 		const struct got_error *close_err = got_repo_close(repo);
5914 		if (error == NULL)
5915 			error = close_err;
5916 	}
5917 	if (worktree)
5918 		got_worktree_close(worktree);
5919 	if (pack_fds) {
5920 		const struct got_error *pack_err =
5921 		    got_repo_pack_fds_close(pack_fds);
5922 		if (error == NULL)
5923 			error = pack_err;
5924 	}
5925 	tog_free_refs();
5926 	return error;
5927 }
5928 
5929 __dead static void
5930 usage_blame(void)
5931 {
5932 	endwin();
5933 	fprintf(stderr,
5934 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
5935 	    getprogname());
5936 	exit(1);
5937 }
5938 
5939 struct tog_blame_line {
5940 	int annotated;
5941 	struct got_object_id *id;
5942 };
5943 
5944 static const struct got_error *
5945 draw_blame(struct tog_view *view)
5946 {
5947 	struct tog_blame_view_state *s = &view->state.blame;
5948 	struct tog_blame *blame = &s->blame;
5949 	regmatch_t *regmatch = &view->regmatch;
5950 	const struct got_error *err;
5951 	int lineno = 0, nprinted = 0;
5952 	char *line = NULL;
5953 	size_t linesize = 0;
5954 	ssize_t linelen;
5955 	wchar_t *wline;
5956 	int width;
5957 	struct tog_blame_line *blame_line;
5958 	struct got_object_id *prev_id = NULL;
5959 	char *id_str;
5960 	struct tog_color *tc;
5961 
5962 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
5963 	if (err)
5964 		return err;
5965 
5966 	rewind(blame->f);
5967 	werase(view->window);
5968 
5969 	if (asprintf(&line, "commit %s", id_str) == -1) {
5970 		err = got_error_from_errno("asprintf");
5971 		free(id_str);
5972 		return err;
5973 	}
5974 
5975 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5976 	free(line);
5977 	line = NULL;
5978 	if (err)
5979 		return err;
5980 	if (view_needs_focus_indication(view))
5981 		wstandout(view->window);
5982 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5983 	if (tc)
5984 		wattr_on(view->window, COLOR_PAIR(tc->colorpair), NULL);
5985 	waddwstr(view->window, wline);
5986 	while (width++ < view->ncols)
5987 		waddch(view->window, ' ');
5988 	if (tc)
5989 		wattr_off(view->window, COLOR_PAIR(tc->colorpair), NULL);
5990 	if (view_needs_focus_indication(view))
5991 		wstandend(view->window);
5992 	free(wline);
5993 	wline = NULL;
5994 
5995 	if (view->gline > blame->nlines)
5996 		view->gline = blame->nlines;
5997 
5998 	if (asprintf(&line, "[%d/%d] %s%s", view->gline ? view->gline :
5999 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
6000 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
6001 		free(id_str);
6002 		return got_error_from_errno("asprintf");
6003 	}
6004 	free(id_str);
6005 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
6006 	free(line);
6007 	line = NULL;
6008 	if (err)
6009 		return err;
6010 	waddwstr(view->window, wline);
6011 	free(wline);
6012 	wline = NULL;
6013 	if (width < view->ncols - 1)
6014 		waddch(view->window, '\n');
6015 
6016 	s->eof = 0;
6017 	view->maxx = 0;
6018 	while (nprinted < view->nlines - 2) {
6019 		linelen = getline(&line, &linesize, blame->f);
6020 		if (linelen == -1) {
6021 			if (feof(blame->f)) {
6022 				s->eof = 1;
6023 				break;
6024 			}
6025 			free(line);
6026 			return got_ferror(blame->f, GOT_ERR_IO);
6027 		}
6028 		if (++lineno < s->first_displayed_line)
6029 			continue;
6030 		if (view->gline && !gotoline(view, &lineno, &nprinted))
6031 			continue;
6032 
6033 		/* Set view->maxx based on full line length. */
6034 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
6035 		if (err) {
6036 			free(line);
6037 			return err;
6038 		}
6039 		free(wline);
6040 		wline = NULL;
6041 		view->maxx = MAX(view->maxx, width);
6042 
6043 		if (nprinted == s->selected_line - 1)
6044 			wstandout(view->window);
6045 
6046 		if (blame->nlines > 0) {
6047 			blame_line = &blame->lines[lineno - 1];
6048 			if (blame_line->annotated && prev_id &&
6049 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
6050 			    !(nprinted == s->selected_line - 1)) {
6051 				waddstr(view->window, "        ");
6052 			} else if (blame_line->annotated) {
6053 				char *id_str;
6054 				err = got_object_id_str(&id_str,
6055 				    blame_line->id);
6056 				if (err) {
6057 					free(line);
6058 					return err;
6059 				}
6060 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6061 				if (tc)
6062 					wattr_on(view->window,
6063 					    COLOR_PAIR(tc->colorpair), NULL);
6064 				wprintw(view->window, "%.8s", id_str);
6065 				if (tc)
6066 					wattr_off(view->window,
6067 					    COLOR_PAIR(tc->colorpair), NULL);
6068 				free(id_str);
6069 				prev_id = blame_line->id;
6070 			} else {
6071 				waddstr(view->window, "........");
6072 				prev_id = NULL;
6073 			}
6074 		} else {
6075 			waddstr(view->window, "........");
6076 			prev_id = NULL;
6077 		}
6078 
6079 		if (nprinted == s->selected_line - 1)
6080 			wstandend(view->window);
6081 		waddstr(view->window, " ");
6082 
6083 		if (view->ncols <= 9) {
6084 			width = 9;
6085 		} else if (s->first_displayed_line + nprinted ==
6086 		    s->matched_line &&
6087 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
6088 			err = add_matched_line(&width, line, view->ncols - 9, 9,
6089 			    view->window, view->x, regmatch);
6090 			if (err) {
6091 				free(line);
6092 				return err;
6093 			}
6094 			width += 9;
6095 		} else {
6096 			int skip;
6097 			err = format_line(&wline, &width, &skip, line,
6098 			    view->x, view->ncols - 9, 9, 1);
6099 			if (err) {
6100 				free(line);
6101 				return err;
6102 			}
6103 			waddwstr(view->window, &wline[skip]);
6104 			width += 9;
6105 			free(wline);
6106 			wline = NULL;
6107 		}
6108 
6109 		if (width <= view->ncols - 1)
6110 			waddch(view->window, '\n');
6111 		if (++nprinted == 1)
6112 			s->first_displayed_line = lineno;
6113 	}
6114 	free(line);
6115 	s->last_displayed_line = lineno;
6116 
6117 	view_border(view);
6118 
6119 	return NULL;
6120 }
6121 
6122 static const struct got_error *
6123 blame_cb(void *arg, int nlines, int lineno,
6124     struct got_commit_object *commit, struct got_object_id *id)
6125 {
6126 	const struct got_error *err = NULL;
6127 	struct tog_blame_cb_args *a = arg;
6128 	struct tog_blame_line *line;
6129 	int errcode;
6130 
6131 	if (nlines != a->nlines ||
6132 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
6133 		return got_error(GOT_ERR_RANGE);
6134 
6135 	errcode = pthread_mutex_lock(&tog_mutex);
6136 	if (errcode)
6137 		return got_error_set_errno(errcode, "pthread_mutex_lock");
6138 
6139 	if (*a->quit) {	/* user has quit the blame view */
6140 		err = got_error(GOT_ERR_ITER_COMPLETED);
6141 		goto done;
6142 	}
6143 
6144 	if (lineno == -1)
6145 		goto done; /* no change in this commit */
6146 
6147 	line = &a->lines[lineno - 1];
6148 	if (line->annotated)
6149 		goto done;
6150 
6151 	line->id = got_object_id_dup(id);
6152 	if (line->id == NULL) {
6153 		err = got_error_from_errno("got_object_id_dup");
6154 		goto done;
6155 	}
6156 	line->annotated = 1;
6157 done:
6158 	errcode = pthread_mutex_unlock(&tog_mutex);
6159 	if (errcode)
6160 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
6161 	return err;
6162 }
6163 
6164 static void *
6165 blame_thread(void *arg)
6166 {
6167 	const struct got_error *err, *close_err;
6168 	struct tog_blame_thread_args *ta = arg;
6169 	struct tog_blame_cb_args *a = ta->cb_args;
6170 	int errcode, fd1 = -1, fd2 = -1;
6171 	FILE *f1 = NULL, *f2 = NULL;
6172 
6173 	fd1 = got_opentempfd();
6174 	if (fd1 == -1)
6175 		return (void *)got_error_from_errno("got_opentempfd");
6176 
6177 	fd2 = got_opentempfd();
6178 	if (fd2 == -1) {
6179 		err = got_error_from_errno("got_opentempfd");
6180 		goto done;
6181 	}
6182 
6183 	f1 = got_opentemp();
6184 	if (f1 == NULL) {
6185 		err = (void *)got_error_from_errno("got_opentemp");
6186 		goto done;
6187 	}
6188 	f2 = got_opentemp();
6189 	if (f2 == NULL) {
6190 		err = (void *)got_error_from_errno("got_opentemp");
6191 		goto done;
6192 	}
6193 
6194 	err = block_signals_used_by_main_thread();
6195 	if (err)
6196 		goto done;
6197 
6198 	err = got_blame(ta->path, a->commit_id, ta->repo,
6199 	    tog_diff_algo, blame_cb, ta->cb_args,
6200 	    ta->cancel_cb, ta->cancel_arg, fd1, fd2, f1, f2);
6201 	if (err && err->code == GOT_ERR_CANCELLED)
6202 		err = NULL;
6203 
6204 	errcode = pthread_mutex_lock(&tog_mutex);
6205 	if (errcode) {
6206 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
6207 		goto done;
6208 	}
6209 
6210 	close_err = got_repo_close(ta->repo);
6211 	if (err == NULL)
6212 		err = close_err;
6213 	ta->repo = NULL;
6214 	*ta->complete = 1;
6215 
6216 	errcode = pthread_mutex_unlock(&tog_mutex);
6217 	if (errcode && err == NULL)
6218 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
6219 
6220 done:
6221 	if (fd1 != -1 && close(fd1) == -1 && err == NULL)
6222 		err = got_error_from_errno("close");
6223 	if (fd2 != -1 && close(fd2) == -1 && err == NULL)
6224 		err = got_error_from_errno("close");
6225 	if (f1 && fclose(f1) == EOF && err == NULL)
6226 		err = got_error_from_errno("fclose");
6227 	if (f2 && fclose(f2) == EOF && err == NULL)
6228 		err = got_error_from_errno("fclose");
6229 
6230 	return (void *)err;
6231 }
6232 
6233 static struct got_object_id *
6234 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
6235     int first_displayed_line, int selected_line)
6236 {
6237 	struct tog_blame_line *line;
6238 
6239 	if (nlines <= 0)
6240 		return NULL;
6241 
6242 	line = &lines[first_displayed_line - 1 + selected_line - 1];
6243 	if (!line->annotated)
6244 		return NULL;
6245 
6246 	return line->id;
6247 }
6248 
6249 static struct got_object_id *
6250 get_annotation_for_line(struct tog_blame_line *lines, int nlines,
6251     int lineno)
6252 {
6253 	struct tog_blame_line *line;
6254 
6255 	if (nlines <= 0 || lineno >= nlines)
6256 		return NULL;
6257 
6258 	line = &lines[lineno - 1];
6259 	if (!line->annotated)
6260 		return NULL;
6261 
6262 	return line->id;
6263 }
6264 
6265 static const struct got_error *
6266 stop_blame(struct tog_blame *blame)
6267 {
6268 	const struct got_error *err = NULL;
6269 	int i;
6270 
6271 	if (blame->thread) {
6272 		int errcode;
6273 		errcode = pthread_mutex_unlock(&tog_mutex);
6274 		if (errcode)
6275 			return got_error_set_errno(errcode,
6276 			    "pthread_mutex_unlock");
6277 		errcode = pthread_join(blame->thread, (void **)&err);
6278 		if (errcode)
6279 			return got_error_set_errno(errcode, "pthread_join");
6280 		errcode = pthread_mutex_lock(&tog_mutex);
6281 		if (errcode)
6282 			return got_error_set_errno(errcode,
6283 			    "pthread_mutex_lock");
6284 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
6285 			err = NULL;
6286 		blame->thread = 0; //NULL;
6287 	}
6288 	if (blame->thread_args.repo) {
6289 		const struct got_error *close_err;
6290 		close_err = got_repo_close(blame->thread_args.repo);
6291 		if (err == NULL)
6292 			err = close_err;
6293 		blame->thread_args.repo = NULL;
6294 	}
6295 	if (blame->f) {
6296 		if (fclose(blame->f) == EOF && err == NULL)
6297 			err = got_error_from_errno("fclose");
6298 		blame->f = NULL;
6299 	}
6300 	if (blame->lines) {
6301 		for (i = 0; i < blame->nlines; i++)
6302 			free(blame->lines[i].id);
6303 		free(blame->lines);
6304 		blame->lines = NULL;
6305 	}
6306 	free(blame->cb_args.commit_id);
6307 	blame->cb_args.commit_id = NULL;
6308 	if (blame->pack_fds) {
6309 		const struct got_error *pack_err =
6310 		    got_repo_pack_fds_close(blame->pack_fds);
6311 		if (err == NULL)
6312 			err = pack_err;
6313 		blame->pack_fds = NULL;
6314 	}
6315 	return err;
6316 }
6317 
6318 static const struct got_error *
6319 cancel_blame_view(void *arg)
6320 {
6321 	const struct got_error *err = NULL;
6322 	int *done = arg;
6323 	int errcode;
6324 
6325 	errcode = pthread_mutex_lock(&tog_mutex);
6326 	if (errcode)
6327 		return got_error_set_errno(errcode,
6328 		    "pthread_mutex_unlock");
6329 
6330 	if (*done)
6331 		err = got_error(GOT_ERR_CANCELLED);
6332 
6333 	errcode = pthread_mutex_unlock(&tog_mutex);
6334 	if (errcode)
6335 		return got_error_set_errno(errcode,
6336 		    "pthread_mutex_lock");
6337 
6338 	return err;
6339 }
6340 
6341 static const struct got_error *
6342 run_blame(struct tog_view *view)
6343 {
6344 	struct tog_blame_view_state *s = &view->state.blame;
6345 	struct tog_blame *blame = &s->blame;
6346 	const struct got_error *err = NULL;
6347 	struct got_commit_object *commit = NULL;
6348 	struct got_blob_object *blob = NULL;
6349 	struct got_repository *thread_repo = NULL;
6350 	struct got_object_id *obj_id = NULL;
6351 	int obj_type, fd = -1;
6352 	int *pack_fds = NULL;
6353 
6354 	err = got_object_open_as_commit(&commit, s->repo,
6355 	    &s->blamed_commit->id);
6356 	if (err)
6357 		return err;
6358 
6359 	fd = got_opentempfd();
6360 	if (fd == -1) {
6361 		err = got_error_from_errno("got_opentempfd");
6362 		goto done;
6363 	}
6364 
6365 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
6366 	if (err)
6367 		goto done;
6368 
6369 	err = got_object_get_type(&obj_type, s->repo, obj_id);
6370 	if (err)
6371 		goto done;
6372 
6373 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
6374 		err = got_error(GOT_ERR_OBJ_TYPE);
6375 		goto done;
6376 	}
6377 
6378 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
6379 	if (err)
6380 		goto done;
6381 	blame->f = got_opentemp();
6382 	if (blame->f == NULL) {
6383 		err = got_error_from_errno("got_opentemp");
6384 		goto done;
6385 	}
6386 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
6387 	    &blame->line_offsets, blame->f, blob);
6388 	if (err)
6389 		goto done;
6390 	if (blame->nlines == 0) {
6391 		s->blame_complete = 1;
6392 		goto done;
6393 	}
6394 
6395 	/* Don't include \n at EOF in the blame line count. */
6396 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
6397 		blame->nlines--;
6398 
6399 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
6400 	if (blame->lines == NULL) {
6401 		err = got_error_from_errno("calloc");
6402 		goto done;
6403 	}
6404 
6405 	err = got_repo_pack_fds_open(&pack_fds);
6406 	if (err)
6407 		goto done;
6408 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
6409 	    pack_fds);
6410 	if (err)
6411 		goto done;
6412 
6413 	blame->pack_fds = pack_fds;
6414 	blame->cb_args.view = view;
6415 	blame->cb_args.lines = blame->lines;
6416 	blame->cb_args.nlines = blame->nlines;
6417 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
6418 	if (blame->cb_args.commit_id == NULL) {
6419 		err = got_error_from_errno("got_object_id_dup");
6420 		goto done;
6421 	}
6422 	blame->cb_args.quit = &s->done;
6423 
6424 	blame->thread_args.path = s->path;
6425 	blame->thread_args.repo = thread_repo;
6426 	blame->thread_args.cb_args = &blame->cb_args;
6427 	blame->thread_args.complete = &s->blame_complete;
6428 	blame->thread_args.cancel_cb = cancel_blame_view;
6429 	blame->thread_args.cancel_arg = &s->done;
6430 	s->blame_complete = 0;
6431 
6432 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
6433 		s->first_displayed_line = 1;
6434 		s->last_displayed_line = view->nlines;
6435 		s->selected_line = 1;
6436 	}
6437 	s->matched_line = 0;
6438 
6439 done:
6440 	if (commit)
6441 		got_object_commit_close(commit);
6442 	if (fd != -1 && close(fd) == -1 && err == NULL)
6443 		err = got_error_from_errno("close");
6444 	if (blob)
6445 		got_object_blob_close(blob);
6446 	free(obj_id);
6447 	if (err)
6448 		stop_blame(blame);
6449 	return err;
6450 }
6451 
6452 static const struct got_error *
6453 open_blame_view(struct tog_view *view, char *path,
6454     struct got_object_id *commit_id, struct got_repository *repo)
6455 {
6456 	const struct got_error *err = NULL;
6457 	struct tog_blame_view_state *s = &view->state.blame;
6458 
6459 	STAILQ_INIT(&s->blamed_commits);
6460 
6461 	s->path = strdup(path);
6462 	if (s->path == NULL)
6463 		return got_error_from_errno("strdup");
6464 
6465 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
6466 	if (err) {
6467 		free(s->path);
6468 		return err;
6469 	}
6470 
6471 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
6472 	s->first_displayed_line = 1;
6473 	s->last_displayed_line = view->nlines;
6474 	s->selected_line = 1;
6475 	s->blame_complete = 0;
6476 	s->repo = repo;
6477 	s->commit_id = commit_id;
6478 	memset(&s->blame, 0, sizeof(s->blame));
6479 
6480 	STAILQ_INIT(&s->colors);
6481 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6482 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
6483 		    get_color_value("TOG_COLOR_COMMIT"));
6484 		if (err)
6485 			return err;
6486 	}
6487 
6488 	view->show = show_blame_view;
6489 	view->input = input_blame_view;
6490 	view->reset = reset_blame_view;
6491 	view->close = close_blame_view;
6492 	view->search_start = search_start_blame_view;
6493 	view->search_setup = search_setup_blame_view;
6494 	view->search_next = search_next_view_match;
6495 
6496 	return run_blame(view);
6497 }
6498 
6499 static const struct got_error *
6500 close_blame_view(struct tog_view *view)
6501 {
6502 	const struct got_error *err = NULL;
6503 	struct tog_blame_view_state *s = &view->state.blame;
6504 
6505 	if (s->blame.thread)
6506 		err = stop_blame(&s->blame);
6507 
6508 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
6509 		struct got_object_qid *blamed_commit;
6510 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
6511 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
6512 		got_object_qid_free(blamed_commit);
6513 	}
6514 
6515 	free(s->path);
6516 	free_colors(&s->colors);
6517 	return err;
6518 }
6519 
6520 static const struct got_error *
6521 search_start_blame_view(struct tog_view *view)
6522 {
6523 	struct tog_blame_view_state *s = &view->state.blame;
6524 
6525 	s->matched_line = 0;
6526 	return NULL;
6527 }
6528 
6529 static void
6530 search_setup_blame_view(struct tog_view *view, FILE **f, off_t **line_offsets,
6531     size_t *nlines, int **first, int **last, int **match, int **selected)
6532 {
6533 	struct tog_blame_view_state *s = &view->state.blame;
6534 
6535 	*f = s->blame.f;
6536 	*nlines = s->blame.nlines;
6537 	*line_offsets = s->blame.line_offsets;
6538 	*match = &s->matched_line;
6539 	*first = &s->first_displayed_line;
6540 	*last = &s->last_displayed_line;
6541 	*selected = &s->selected_line;
6542 }
6543 
6544 static const struct got_error *
6545 show_blame_view(struct tog_view *view)
6546 {
6547 	const struct got_error *err = NULL;
6548 	struct tog_blame_view_state *s = &view->state.blame;
6549 	int errcode;
6550 
6551 	if (s->blame.thread == 0 && !s->blame_complete) {
6552 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
6553 		    &s->blame.thread_args);
6554 		if (errcode)
6555 			return got_error_set_errno(errcode, "pthread_create");
6556 
6557 		if (!using_mock_io)
6558 			halfdelay(1); /* fast refresh while annotating  */
6559 	}
6560 
6561 	if (s->blame_complete && !using_mock_io)
6562 		halfdelay(10); /* disable fast refresh */
6563 
6564 	err = draw_blame(view);
6565 
6566 	view_border(view);
6567 	return err;
6568 }
6569 
6570 static const struct got_error *
6571 log_annotated_line(struct tog_view **new_view, int begin_y, int begin_x,
6572     struct got_repository *repo, struct got_object_id *id)
6573 {
6574 	struct tog_view		*log_view;
6575 	const struct got_error	*err = NULL;
6576 
6577 	*new_view = NULL;
6578 
6579 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
6580 	if (log_view == NULL)
6581 		return got_error_from_errno("view_open");
6582 
6583 	err = open_log_view(log_view, id, repo, GOT_REF_HEAD, "", 0);
6584 	if (err)
6585 		view_close(log_view);
6586 	else
6587 		*new_view = log_view;
6588 
6589 	return err;
6590 }
6591 
6592 static const struct got_error *
6593 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
6594 {
6595 	const struct got_error *err = NULL, *thread_err = NULL;
6596 	struct tog_view *diff_view;
6597 	struct tog_blame_view_state *s = &view->state.blame;
6598 	int eos, nscroll, begin_y = 0, begin_x = 0;
6599 
6600 	eos = nscroll = view->nlines - 2;
6601 	if (view_is_hsplit_top(view))
6602 		--eos;  /* border */
6603 
6604 	switch (ch) {
6605 	case '0':
6606 	case '$':
6607 	case KEY_RIGHT:
6608 	case 'l':
6609 	case KEY_LEFT:
6610 	case 'h':
6611 		horizontal_scroll_input(view, ch);
6612 		break;
6613 	case 'q':
6614 		s->done = 1;
6615 		break;
6616 	case 'g':
6617 	case KEY_HOME:
6618 		s->selected_line = 1;
6619 		s->first_displayed_line = 1;
6620 		view->count = 0;
6621 		break;
6622 	case 'G':
6623 	case KEY_END:
6624 		if (s->blame.nlines < eos) {
6625 			s->selected_line = s->blame.nlines;
6626 			s->first_displayed_line = 1;
6627 		} else {
6628 			s->selected_line = eos;
6629 			s->first_displayed_line = s->blame.nlines - (eos - 1);
6630 		}
6631 		view->count = 0;
6632 		break;
6633 	case 'k':
6634 	case KEY_UP:
6635 	case CTRL('p'):
6636 		if (s->selected_line > 1)
6637 			s->selected_line--;
6638 		else if (s->selected_line == 1 &&
6639 		    s->first_displayed_line > 1)
6640 			s->first_displayed_line--;
6641 		else
6642 			view->count = 0;
6643 		break;
6644 	case CTRL('u'):
6645 	case 'u':
6646 		nscroll /= 2;
6647 		/* FALL THROUGH */
6648 	case KEY_PPAGE:
6649 	case CTRL('b'):
6650 	case 'b':
6651 		if (s->first_displayed_line == 1) {
6652 			if (view->count > 1)
6653 				nscroll += nscroll;
6654 			s->selected_line = MAX(1, s->selected_line - nscroll);
6655 			view->count = 0;
6656 			break;
6657 		}
6658 		if (s->first_displayed_line > nscroll)
6659 			s->first_displayed_line -= nscroll;
6660 		else
6661 			s->first_displayed_line = 1;
6662 		break;
6663 	case 'j':
6664 	case KEY_DOWN:
6665 	case CTRL('n'):
6666 		if (s->selected_line < eos && s->first_displayed_line +
6667 		    s->selected_line <= s->blame.nlines)
6668 			s->selected_line++;
6669 		else if (s->first_displayed_line < s->blame.nlines - (eos - 1))
6670 			s->first_displayed_line++;
6671 		else
6672 			view->count = 0;
6673 		break;
6674 	case 'c':
6675 	case 'p': {
6676 		struct got_object_id *id = NULL;
6677 
6678 		view->count = 0;
6679 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
6680 		    s->first_displayed_line, s->selected_line);
6681 		if (id == NULL)
6682 			break;
6683 		if (ch == 'p') {
6684 			struct got_commit_object *commit, *pcommit;
6685 			struct got_object_qid *pid;
6686 			struct got_object_id *blob_id = NULL;
6687 			int obj_type;
6688 			err = got_object_open_as_commit(&commit,
6689 			    s->repo, id);
6690 			if (err)
6691 				break;
6692 			pid = STAILQ_FIRST(
6693 			    got_object_commit_get_parent_ids(commit));
6694 			if (pid == NULL) {
6695 				got_object_commit_close(commit);
6696 				break;
6697 			}
6698 			/* Check if path history ends here. */
6699 			err = got_object_open_as_commit(&pcommit,
6700 			    s->repo, &pid->id);
6701 			if (err)
6702 				break;
6703 			err = got_object_id_by_path(&blob_id, s->repo,
6704 			    pcommit, s->path);
6705 			got_object_commit_close(pcommit);
6706 			if (err) {
6707 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
6708 					err = NULL;
6709 				got_object_commit_close(commit);
6710 				break;
6711 			}
6712 			err = got_object_get_type(&obj_type, s->repo,
6713 			    blob_id);
6714 			free(blob_id);
6715 			/* Can't blame non-blob type objects. */
6716 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
6717 				got_object_commit_close(commit);
6718 				break;
6719 			}
6720 			err = got_object_qid_alloc(&s->blamed_commit,
6721 			    &pid->id);
6722 			got_object_commit_close(commit);
6723 		} else {
6724 			if (got_object_id_cmp(id,
6725 			    &s->blamed_commit->id) == 0)
6726 				break;
6727 			err = got_object_qid_alloc(&s->blamed_commit,
6728 			    id);
6729 		}
6730 		if (err)
6731 			break;
6732 		s->done = 1;
6733 		thread_err = stop_blame(&s->blame);
6734 		s->done = 0;
6735 		if (thread_err)
6736 			break;
6737 		STAILQ_INSERT_HEAD(&s->blamed_commits,
6738 		    s->blamed_commit, entry);
6739 		err = run_blame(view);
6740 		if (err)
6741 			break;
6742 		break;
6743 	}
6744 	case 'C': {
6745 		struct got_object_qid *first;
6746 
6747 		view->count = 0;
6748 		first = STAILQ_FIRST(&s->blamed_commits);
6749 		if (!got_object_id_cmp(&first->id, s->commit_id))
6750 			break;
6751 		s->done = 1;
6752 		thread_err = stop_blame(&s->blame);
6753 		s->done = 0;
6754 		if (thread_err)
6755 			break;
6756 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
6757 		got_object_qid_free(s->blamed_commit);
6758 		s->blamed_commit =
6759 		    STAILQ_FIRST(&s->blamed_commits);
6760 		err = run_blame(view);
6761 		if (err)
6762 			break;
6763 		break;
6764 	}
6765 	case 'L':
6766 		view->count = 0;
6767 		s->id_to_log = get_selected_commit_id(s->blame.lines,
6768 		    s->blame.nlines, s->first_displayed_line, s->selected_line);
6769 		if (s->id_to_log)
6770 			err = view_request_new(new_view, view, TOG_VIEW_LOG);
6771 		break;
6772 	case KEY_ENTER:
6773 	case '\r': {
6774 		struct got_object_id *id = NULL;
6775 		struct got_object_qid *pid;
6776 		struct got_commit_object *commit = NULL;
6777 
6778 		view->count = 0;
6779 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
6780 		    s->first_displayed_line, s->selected_line);
6781 		if (id == NULL)
6782 			break;
6783 		err = got_object_open_as_commit(&commit, s->repo, id);
6784 		if (err)
6785 			break;
6786 		pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
6787 		if (*new_view) {
6788 			/* traversed from diff view, release diff resources  */
6789 			err = close_diff_view(*new_view);
6790 			if (err)
6791 				break;
6792 			diff_view = *new_view;
6793 		} else {
6794 			if (view_is_parent_view(view))
6795 				view_get_split(view, &begin_y, &begin_x);
6796 
6797 			diff_view = view_open(0, 0, begin_y, begin_x,
6798 			    TOG_VIEW_DIFF);
6799 			if (diff_view == NULL) {
6800 				got_object_commit_close(commit);
6801 				err = got_error_from_errno("view_open");
6802 				break;
6803 			}
6804 		}
6805 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
6806 		    id, NULL, NULL, 3, 0, 0, view, s->repo);
6807 		got_object_commit_close(commit);
6808 		if (err) {
6809 			view_close(diff_view);
6810 			break;
6811 		}
6812 		s->last_diffed_line = s->first_displayed_line - 1 +
6813 		    s->selected_line;
6814 		if (*new_view)
6815 			break;	/* still open from active diff view */
6816 		if (view_is_parent_view(view) &&
6817 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6818 			err = view_init_hsplit(view, begin_y);
6819 			if (err)
6820 				break;
6821 		}
6822 
6823 		view->focussed = 0;
6824 		diff_view->focussed = 1;
6825 		diff_view->mode = view->mode;
6826 		diff_view->nlines = view->lines - begin_y;
6827 		if (view_is_parent_view(view)) {
6828 			view_transfer_size(diff_view, view);
6829 			err = view_close_child(view);
6830 			if (err)
6831 				break;
6832 			err = view_set_child(view, diff_view);
6833 			if (err)
6834 				break;
6835 			view->focus_child = 1;
6836 		} else
6837 			*new_view = diff_view;
6838 		if (err)
6839 			break;
6840 		break;
6841 	}
6842 	case CTRL('d'):
6843 	case 'd':
6844 		nscroll /= 2;
6845 		/* FALL THROUGH */
6846 	case KEY_NPAGE:
6847 	case CTRL('f'):
6848 	case 'f':
6849 	case ' ':
6850 		if (s->last_displayed_line >= s->blame.nlines &&
6851 		    s->selected_line >= MIN(s->blame.nlines,
6852 		    view->nlines - 2)) {
6853 			view->count = 0;
6854 			break;
6855 		}
6856 		if (s->last_displayed_line >= s->blame.nlines &&
6857 		    s->selected_line < view->nlines - 2) {
6858 			s->selected_line +=
6859 			    MIN(nscroll, s->last_displayed_line -
6860 			    s->first_displayed_line - s->selected_line + 1);
6861 		}
6862 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
6863 			s->first_displayed_line += nscroll;
6864 		else
6865 			s->first_displayed_line =
6866 			    s->blame.nlines - (view->nlines - 3);
6867 		break;
6868 	case KEY_RESIZE:
6869 		if (s->selected_line > view->nlines - 2) {
6870 			s->selected_line = MIN(s->blame.nlines,
6871 			    view->nlines - 2);
6872 		}
6873 		break;
6874 	default:
6875 		view->count = 0;
6876 		break;
6877 	}
6878 	return thread_err ? thread_err : err;
6879 }
6880 
6881 static const struct got_error *
6882 reset_blame_view(struct tog_view *view)
6883 {
6884 	const struct got_error *err;
6885 	struct tog_blame_view_state *s = &view->state.blame;
6886 
6887 	view->count = 0;
6888 	s->done = 1;
6889 	err = stop_blame(&s->blame);
6890 	s->done = 0;
6891 	if (err)
6892 		return err;
6893 	return run_blame(view);
6894 }
6895 
6896 static const struct got_error *
6897 cmd_blame(int argc, char *argv[])
6898 {
6899 	const struct got_error *error;
6900 	struct got_repository *repo = NULL;
6901 	struct got_worktree *worktree = NULL;
6902 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6903 	char *link_target = NULL;
6904 	struct got_object_id *commit_id = NULL;
6905 	struct got_commit_object *commit = NULL;
6906 	char *commit_id_str = NULL;
6907 	int ch;
6908 	struct tog_view *view = NULL;
6909 	int *pack_fds = NULL;
6910 
6911 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6912 		switch (ch) {
6913 		case 'c':
6914 			commit_id_str = optarg;
6915 			break;
6916 		case 'r':
6917 			repo_path = realpath(optarg, NULL);
6918 			if (repo_path == NULL)
6919 				return got_error_from_errno2("realpath",
6920 				    optarg);
6921 			break;
6922 		default:
6923 			usage_blame();
6924 			/* NOTREACHED */
6925 		}
6926 	}
6927 
6928 	argc -= optind;
6929 	argv += optind;
6930 
6931 	if (argc != 1)
6932 		usage_blame();
6933 
6934 	error = got_repo_pack_fds_open(&pack_fds);
6935 	if (error != NULL)
6936 		goto done;
6937 
6938 	if (repo_path == NULL) {
6939 		cwd = getcwd(NULL, 0);
6940 		if (cwd == NULL)
6941 			return got_error_from_errno("getcwd");
6942 		error = got_worktree_open(&worktree, cwd);
6943 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6944 			goto done;
6945 		if (worktree)
6946 			repo_path =
6947 			    strdup(got_worktree_get_repo_path(worktree));
6948 		else
6949 			repo_path = strdup(cwd);
6950 		if (repo_path == NULL) {
6951 			error = got_error_from_errno("strdup");
6952 			goto done;
6953 		}
6954 	}
6955 
6956 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6957 	if (error != NULL)
6958 		goto done;
6959 
6960 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
6961 	    worktree);
6962 	if (error)
6963 		goto done;
6964 
6965 	init_curses();
6966 
6967 	error = apply_unveil(got_repo_get_path(repo), NULL);
6968 	if (error)
6969 		goto done;
6970 
6971 	error = tog_load_refs(repo, 0);
6972 	if (error)
6973 		goto done;
6974 
6975 	if (commit_id_str == NULL) {
6976 		struct got_reference *head_ref;
6977 		error = got_ref_open(&head_ref, repo, worktree ?
6978 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
6979 		if (error != NULL)
6980 			goto done;
6981 		error = got_ref_resolve(&commit_id, repo, head_ref);
6982 		got_ref_close(head_ref);
6983 	} else {
6984 		error = got_repo_match_object_id(&commit_id, NULL,
6985 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6986 	}
6987 	if (error != NULL)
6988 		goto done;
6989 
6990 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
6991 	if (view == NULL) {
6992 		error = got_error_from_errno("view_open");
6993 		goto done;
6994 	}
6995 
6996 	error = got_object_open_as_commit(&commit, repo, commit_id);
6997 	if (error)
6998 		goto done;
6999 
7000 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
7001 	    commit, repo);
7002 	if (error)
7003 		goto done;
7004 
7005 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
7006 	    commit_id, repo);
7007 	if (error)
7008 		goto done;
7009 	if (worktree) {
7010 		/* Release work tree lock. */
7011 		got_worktree_close(worktree);
7012 		worktree = NULL;
7013 	}
7014 	error = view_loop(view);
7015 done:
7016 	free(repo_path);
7017 	free(in_repo_path);
7018 	free(link_target);
7019 	free(cwd);
7020 	free(commit_id);
7021 	if (error != NULL && view != NULL) {
7022 		if (view->close == NULL)
7023 			close_blame_view(view);
7024 		view_close(view);
7025 	}
7026 	if (commit)
7027 		got_object_commit_close(commit);
7028 	if (worktree)
7029 		got_worktree_close(worktree);
7030 	if (repo) {
7031 		const struct got_error *close_err = got_repo_close(repo);
7032 		if (error == NULL)
7033 			error = close_err;
7034 	}
7035 	if (pack_fds) {
7036 		const struct got_error *pack_err =
7037 		    got_repo_pack_fds_close(pack_fds);
7038 		if (error == NULL)
7039 			error = pack_err;
7040 	}
7041 	tog_free_refs();
7042 	return error;
7043 }
7044 
7045 static const struct got_error *
7046 draw_tree_entries(struct tog_view *view, const char *parent_path)
7047 {
7048 	struct tog_tree_view_state *s = &view->state.tree;
7049 	const struct got_error *err = NULL;
7050 	struct got_tree_entry *te;
7051 	wchar_t *wline;
7052 	char *index = NULL;
7053 	struct tog_color *tc;
7054 	int width, n, nentries, scrollx, i = 1;
7055 	int limit = view->nlines;
7056 
7057 	s->ndisplayed = 0;
7058 	if (view_is_hsplit_top(view))
7059 		--limit;  /* border */
7060 
7061 	werase(view->window);
7062 
7063 	if (limit == 0)
7064 		return NULL;
7065 
7066 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
7067 	    0, 0);
7068 	if (err)
7069 		return err;
7070 	if (view_needs_focus_indication(view))
7071 		wstandout(view->window);
7072 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
7073 	if (tc)
7074 		wattr_on(view->window, COLOR_PAIR(tc->colorpair), NULL);
7075 	waddwstr(view->window, wline);
7076 	free(wline);
7077 	wline = NULL;
7078 	while (width++ < view->ncols)
7079 		waddch(view->window, ' ');
7080 	if (tc)
7081 		wattr_off(view->window, COLOR_PAIR(tc->colorpair), NULL);
7082 	if (view_needs_focus_indication(view))
7083 		wstandend(view->window);
7084 	if (--limit <= 0)
7085 		return NULL;
7086 
7087 	i += s->selected;
7088 	if (s->first_displayed_entry) {
7089 		i += got_tree_entry_get_index(s->first_displayed_entry);
7090 		if (s->tree != s->root)
7091 			++i;  /* account for ".." entry */
7092 	}
7093 	nentries = got_object_tree_get_nentries(s->tree);
7094 	if (asprintf(&index, "[%d/%d] %s",
7095 	    i, nentries + (s->tree == s->root ? 0 : 1), parent_path) == -1)
7096 		return got_error_from_errno("asprintf");
7097 	err = format_line(&wline, &width, NULL, index, 0, view->ncols, 0, 0);
7098 	free(index);
7099 	if (err)
7100 		return err;
7101 	waddwstr(view->window, wline);
7102 	free(wline);
7103 	wline = NULL;
7104 	if (width < view->ncols - 1)
7105 		waddch(view->window, '\n');
7106 	if (--limit <= 0)
7107 		return NULL;
7108 	waddch(view->window, '\n');
7109 	if (--limit <= 0)
7110 		return NULL;
7111 
7112 	if (s->first_displayed_entry == NULL) {
7113 		te = got_object_tree_get_first_entry(s->tree);
7114 		if (s->selected == 0) {
7115 			if (view->focussed)
7116 				wstandout(view->window);
7117 			s->selected_entry = NULL;
7118 		}
7119 		waddstr(view->window, "  ..\n");	/* parent directory */
7120 		if (s->selected == 0 && view->focussed)
7121 			wstandend(view->window);
7122 		s->ndisplayed++;
7123 		if (--limit <= 0)
7124 			return NULL;
7125 		n = 1;
7126 	} else {
7127 		n = 0;
7128 		te = s->first_displayed_entry;
7129 	}
7130 
7131 	view->maxx = 0;
7132 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
7133 		char *line = NULL, *id_str = NULL, *link_target = NULL;
7134 		const char *modestr = "";
7135 		mode_t mode;
7136 
7137 		te = got_object_tree_get_entry(s->tree, i);
7138 		mode = got_tree_entry_get_mode(te);
7139 
7140 		if (s->show_ids) {
7141 			err = got_object_id_str(&id_str,
7142 			    got_tree_entry_get_id(te));
7143 			if (err)
7144 				return got_error_from_errno(
7145 				    "got_object_id_str");
7146 		}
7147 		if (got_object_tree_entry_is_submodule(te))
7148 			modestr = "$";
7149 		else if (S_ISLNK(mode)) {
7150 			int i;
7151 
7152 			err = got_tree_entry_get_symlink_target(&link_target,
7153 			    te, s->repo);
7154 			if (err) {
7155 				free(id_str);
7156 				return err;
7157 			}
7158 			for (i = 0; i < strlen(link_target); i++) {
7159 				if (!isprint((unsigned char)link_target[i]))
7160 					link_target[i] = '?';
7161 			}
7162 			modestr = "@";
7163 		}
7164 		else if (S_ISDIR(mode))
7165 			modestr = "/";
7166 		else if (mode & S_IXUSR)
7167 			modestr = "*";
7168 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
7169 		    got_tree_entry_get_name(te), modestr,
7170 		    link_target ? " -> ": "",
7171 		    link_target ? link_target : "") == -1) {
7172 			free(id_str);
7173 			free(link_target);
7174 			return got_error_from_errno("asprintf");
7175 		}
7176 		free(id_str);
7177 		free(link_target);
7178 
7179 		/* use full line width to determine view->maxx */
7180 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0, 0);
7181 		if (err) {
7182 			free(line);
7183 			break;
7184 		}
7185 		view->maxx = MAX(view->maxx, width);
7186 		free(wline);
7187 		wline = NULL;
7188 
7189 		err = format_line(&wline, &width, &scrollx, line, view->x,
7190 		    view->ncols, 0, 0);
7191 		if (err) {
7192 			free(line);
7193 			break;
7194 		}
7195 		if (n == s->selected) {
7196 			if (view->focussed)
7197 				wstandout(view->window);
7198 			s->selected_entry = te;
7199 		}
7200 		tc = match_color(&s->colors, line);
7201 		if (tc)
7202 			wattr_on(view->window,
7203 			    COLOR_PAIR(tc->colorpair), NULL);
7204 		waddwstr(view->window, &wline[scrollx]);
7205 		if (tc)
7206 			wattr_off(view->window,
7207 			    COLOR_PAIR(tc->colorpair), NULL);
7208 		if (width < view->ncols)
7209 			waddch(view->window, '\n');
7210 		if (n == s->selected && view->focussed)
7211 			wstandend(view->window);
7212 		free(line);
7213 		free(wline);
7214 		wline = NULL;
7215 		n++;
7216 		s->ndisplayed++;
7217 		s->last_displayed_entry = te;
7218 		if (--limit <= 0)
7219 			break;
7220 	}
7221 
7222 	return err;
7223 }
7224 
7225 static void
7226 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
7227 {
7228 	struct got_tree_entry *te;
7229 	int isroot = s->tree == s->root;
7230 	int i = 0;
7231 
7232 	if (s->first_displayed_entry == NULL)
7233 		return;
7234 
7235 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
7236 	while (i++ < maxscroll) {
7237 		if (te == NULL) {
7238 			if (!isroot)
7239 				s->first_displayed_entry = NULL;
7240 			break;
7241 		}
7242 		s->first_displayed_entry = te;
7243 		te = got_tree_entry_get_prev(s->tree, te);
7244 	}
7245 }
7246 
7247 static const struct got_error *
7248 tree_scroll_down(struct tog_view *view, int maxscroll)
7249 {
7250 	struct tog_tree_view_state *s = &view->state.tree;
7251 	struct got_tree_entry *next, *last;
7252 	int n = 0;
7253 
7254 	if (s->first_displayed_entry)
7255 		next = got_tree_entry_get_next(s->tree,
7256 		    s->first_displayed_entry);
7257 	else
7258 		next = got_object_tree_get_first_entry(s->tree);
7259 
7260 	last = s->last_displayed_entry;
7261 	while (next && n++ < maxscroll) {
7262 		if (last) {
7263 			s->last_displayed_entry = last;
7264 			last = got_tree_entry_get_next(s->tree, last);
7265 		}
7266 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN && next)) {
7267 			s->first_displayed_entry = next;
7268 			next = got_tree_entry_get_next(s->tree, next);
7269 		}
7270 	}
7271 
7272 	return NULL;
7273 }
7274 
7275 static const struct got_error *
7276 tree_entry_path(char **path, struct tog_parent_trees *parents,
7277     struct got_tree_entry *te)
7278 {
7279 	const struct got_error *err = NULL;
7280 	struct tog_parent_tree *pt;
7281 	size_t len = 2; /* for leading slash and NUL */
7282 
7283 	TAILQ_FOREACH(pt, parents, entry)
7284 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
7285 		    + 1 /* slash */;
7286 	if (te)
7287 		len += strlen(got_tree_entry_get_name(te));
7288 
7289 	*path = calloc(1, len);
7290 	if (path == NULL)
7291 		return got_error_from_errno("calloc");
7292 
7293 	(*path)[0] = '/';
7294 	pt = TAILQ_LAST(parents, tog_parent_trees);
7295 	while (pt) {
7296 		const char *name = got_tree_entry_get_name(pt->selected_entry);
7297 		if (strlcat(*path, name, len) >= len) {
7298 			err = got_error(GOT_ERR_NO_SPACE);
7299 			goto done;
7300 		}
7301 		if (strlcat(*path, "/", len) >= len) {
7302 			err = got_error(GOT_ERR_NO_SPACE);
7303 			goto done;
7304 		}
7305 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
7306 	}
7307 	if (te) {
7308 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
7309 			err = got_error(GOT_ERR_NO_SPACE);
7310 			goto done;
7311 		}
7312 	}
7313 done:
7314 	if (err) {
7315 		free(*path);
7316 		*path = NULL;
7317 	}
7318 	return err;
7319 }
7320 
7321 static const struct got_error *
7322 blame_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
7323     struct got_tree_entry *te, struct tog_parent_trees *parents,
7324     struct got_object_id *commit_id, struct got_repository *repo)
7325 {
7326 	const struct got_error *err = NULL;
7327 	char *path;
7328 	struct tog_view *blame_view;
7329 
7330 	*new_view = NULL;
7331 
7332 	err = tree_entry_path(&path, parents, te);
7333 	if (err)
7334 		return err;
7335 
7336 	blame_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_BLAME);
7337 	if (blame_view == NULL) {
7338 		err = got_error_from_errno("view_open");
7339 		goto done;
7340 	}
7341 
7342 	err = open_blame_view(blame_view, path, commit_id, repo);
7343 	if (err) {
7344 		if (err->code == GOT_ERR_CANCELLED)
7345 			err = NULL;
7346 		view_close(blame_view);
7347 	} else
7348 		*new_view = blame_view;
7349 done:
7350 	free(path);
7351 	return err;
7352 }
7353 
7354 static const struct got_error *
7355 log_selected_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
7356     struct tog_tree_view_state *s)
7357 {
7358 	struct tog_view *log_view;
7359 	const struct got_error *err = NULL;
7360 	char *path;
7361 
7362 	*new_view = NULL;
7363 
7364 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
7365 	if (log_view == NULL)
7366 		return got_error_from_errno("view_open");
7367 
7368 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
7369 	if (err)
7370 		return err;
7371 
7372 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
7373 	    path, 0);
7374 	if (err)
7375 		view_close(log_view);
7376 	else
7377 		*new_view = log_view;
7378 	free(path);
7379 	return err;
7380 }
7381 
7382 static const struct got_error *
7383 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
7384     const char *head_ref_name, struct got_repository *repo)
7385 {
7386 	const struct got_error *err = NULL;
7387 	char *commit_id_str = NULL;
7388 	struct tog_tree_view_state *s = &view->state.tree;
7389 	struct got_commit_object *commit = NULL;
7390 
7391 	TAILQ_INIT(&s->parents);
7392 	STAILQ_INIT(&s->colors);
7393 
7394 	s->commit_id = got_object_id_dup(commit_id);
7395 	if (s->commit_id == NULL) {
7396 		err = got_error_from_errno("got_object_id_dup");
7397 		goto done;
7398 	}
7399 
7400 	err = got_object_open_as_commit(&commit, repo, commit_id);
7401 	if (err)
7402 		goto done;
7403 
7404 	/*
7405 	 * The root is opened here and will be closed when the view is closed.
7406 	 * Any visited subtrees and their path-wise parents are opened and
7407 	 * closed on demand.
7408 	 */
7409 	err = got_object_open_as_tree(&s->root, repo,
7410 	    got_object_commit_get_tree_id(commit));
7411 	if (err)
7412 		goto done;
7413 	s->tree = s->root;
7414 
7415 	err = got_object_id_str(&commit_id_str, commit_id);
7416 	if (err != NULL)
7417 		goto done;
7418 
7419 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
7420 		err = got_error_from_errno("asprintf");
7421 		goto done;
7422 	}
7423 
7424 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
7425 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
7426 	if (head_ref_name) {
7427 		s->head_ref_name = strdup(head_ref_name);
7428 		if (s->head_ref_name == NULL) {
7429 			err = got_error_from_errno("strdup");
7430 			goto done;
7431 		}
7432 	}
7433 	s->repo = repo;
7434 
7435 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
7436 		err = add_color(&s->colors, "\\$$",
7437 		    TOG_COLOR_TREE_SUBMODULE,
7438 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
7439 		if (err)
7440 			goto done;
7441 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
7442 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
7443 		if (err)
7444 			goto done;
7445 		err = add_color(&s->colors, "/$",
7446 		    TOG_COLOR_TREE_DIRECTORY,
7447 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
7448 		if (err)
7449 			goto done;
7450 
7451 		err = add_color(&s->colors, "\\*$",
7452 		    TOG_COLOR_TREE_EXECUTABLE,
7453 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
7454 		if (err)
7455 			goto done;
7456 
7457 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
7458 		    get_color_value("TOG_COLOR_COMMIT"));
7459 		if (err)
7460 			goto done;
7461 	}
7462 
7463 	view->show = show_tree_view;
7464 	view->input = input_tree_view;
7465 	view->close = close_tree_view;
7466 	view->search_start = search_start_tree_view;
7467 	view->search_next = search_next_tree_view;
7468 done:
7469 	free(commit_id_str);
7470 	if (commit)
7471 		got_object_commit_close(commit);
7472 	if (err) {
7473 		if (view->close == NULL)
7474 			close_tree_view(view);
7475 		view_close(view);
7476 	}
7477 	return err;
7478 }
7479 
7480 static const struct got_error *
7481 close_tree_view(struct tog_view *view)
7482 {
7483 	struct tog_tree_view_state *s = &view->state.tree;
7484 
7485 	free_colors(&s->colors);
7486 	free(s->tree_label);
7487 	s->tree_label = NULL;
7488 	free(s->commit_id);
7489 	s->commit_id = NULL;
7490 	free(s->head_ref_name);
7491 	s->head_ref_name = NULL;
7492 	while (!TAILQ_EMPTY(&s->parents)) {
7493 		struct tog_parent_tree *parent;
7494 		parent = TAILQ_FIRST(&s->parents);
7495 		TAILQ_REMOVE(&s->parents, parent, entry);
7496 		if (parent->tree != s->root)
7497 			got_object_tree_close(parent->tree);
7498 		free(parent);
7499 
7500 	}
7501 	if (s->tree != NULL && s->tree != s->root)
7502 		got_object_tree_close(s->tree);
7503 	if (s->root)
7504 		got_object_tree_close(s->root);
7505 	return NULL;
7506 }
7507 
7508 static const struct got_error *
7509 search_start_tree_view(struct tog_view *view)
7510 {
7511 	struct tog_tree_view_state *s = &view->state.tree;
7512 
7513 	s->matched_entry = NULL;
7514 	return NULL;
7515 }
7516 
7517 static int
7518 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
7519 {
7520 	regmatch_t regmatch;
7521 
7522 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
7523 	    0) == 0;
7524 }
7525 
7526 static const struct got_error *
7527 search_next_tree_view(struct tog_view *view)
7528 {
7529 	struct tog_tree_view_state *s = &view->state.tree;
7530 	struct got_tree_entry *te = NULL;
7531 
7532 	if (!view->searching) {
7533 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
7534 		return NULL;
7535 	}
7536 
7537 	if (s->matched_entry) {
7538 		if (view->searching == TOG_SEARCH_FORWARD) {
7539 			if (s->selected_entry)
7540 				te = got_tree_entry_get_next(s->tree,
7541 				    s->selected_entry);
7542 			else
7543 				te = got_object_tree_get_first_entry(s->tree);
7544 		} else {
7545 			if (s->selected_entry == NULL)
7546 				te = got_object_tree_get_last_entry(s->tree);
7547 			else
7548 				te = got_tree_entry_get_prev(s->tree,
7549 				    s->selected_entry);
7550 		}
7551 	} else {
7552 		if (s->selected_entry)
7553 			te = s->selected_entry;
7554 		else if (view->searching == TOG_SEARCH_FORWARD)
7555 			te = got_object_tree_get_first_entry(s->tree);
7556 		else
7557 			te = got_object_tree_get_last_entry(s->tree);
7558 	}
7559 
7560 	while (1) {
7561 		if (te == NULL) {
7562 			if (s->matched_entry == NULL) {
7563 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
7564 				return NULL;
7565 			}
7566 			if (view->searching == TOG_SEARCH_FORWARD)
7567 				te = got_object_tree_get_first_entry(s->tree);
7568 			else
7569 				te = got_object_tree_get_last_entry(s->tree);
7570 		}
7571 
7572 		if (match_tree_entry(te, &view->regex)) {
7573 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
7574 			s->matched_entry = te;
7575 			break;
7576 		}
7577 
7578 		if (view->searching == TOG_SEARCH_FORWARD)
7579 			te = got_tree_entry_get_next(s->tree, te);
7580 		else
7581 			te = got_tree_entry_get_prev(s->tree, te);
7582 	}
7583 
7584 	if (s->matched_entry) {
7585 		s->first_displayed_entry = s->matched_entry;
7586 		s->selected = 0;
7587 	}
7588 
7589 	return NULL;
7590 }
7591 
7592 static const struct got_error *
7593 show_tree_view(struct tog_view *view)
7594 {
7595 	const struct got_error *err = NULL;
7596 	struct tog_tree_view_state *s = &view->state.tree;
7597 	char *parent_path;
7598 
7599 	err = tree_entry_path(&parent_path, &s->parents, NULL);
7600 	if (err)
7601 		return err;
7602 
7603 	err = draw_tree_entries(view, parent_path);
7604 	free(parent_path);
7605 
7606 	view_border(view);
7607 	return err;
7608 }
7609 
7610 static const struct got_error *
7611 tree_goto_line(struct tog_view *view, int nlines)
7612 {
7613 	const struct got_error		 *err = NULL;
7614 	struct tog_tree_view_state	 *s = &view->state.tree;
7615 	struct got_tree_entry		**fte, **lte, **ste;
7616 	int				  g, last, first = 1, i = 1;
7617 	int				  root = s->tree == s->root;
7618 	int				  off = root ? 1 : 2;
7619 
7620 	g = view->gline;
7621 	view->gline = 0;
7622 
7623 	if (g == 0)
7624 		g = 1;
7625 	else if (g > got_object_tree_get_nentries(s->tree))
7626 		g = got_object_tree_get_nentries(s->tree) + (root ? 0 : 1);
7627 
7628 	fte = &s->first_displayed_entry;
7629 	lte = &s->last_displayed_entry;
7630 	ste = &s->selected_entry;
7631 
7632 	if (*fte != NULL) {
7633 		first = got_tree_entry_get_index(*fte);
7634 		first += off;  /* account for ".." */
7635 	}
7636 	last = got_tree_entry_get_index(*lte);
7637 	last += off;
7638 
7639 	if (g >= first && g <= last && g - first < nlines) {
7640 		s->selected = g - first;
7641 		return NULL;	/* gline is on the current page */
7642 	}
7643 
7644 	if (*ste != NULL) {
7645 		i = got_tree_entry_get_index(*ste);
7646 		i += off;
7647 	}
7648 
7649 	if (i < g) {
7650 		err = tree_scroll_down(view, g - i);
7651 		if (err)
7652 			return err;
7653 		if (got_tree_entry_get_index(*lte) >=
7654 		    got_object_tree_get_nentries(s->tree) - 1 &&
7655 		    first + s->selected < g &&
7656 		    s->selected < s->ndisplayed - 1) {
7657 			first = got_tree_entry_get_index(*fte);
7658 			first += off;
7659 			s->selected = g - first;
7660 		}
7661 	} else if (i > g)
7662 		tree_scroll_up(s, i - g);
7663 
7664 	if (g < nlines &&
7665 	    (*fte == NULL || (root && !got_tree_entry_get_index(*fte))))
7666 		s->selected = g - 1;
7667 
7668 	return NULL;
7669 }
7670 
7671 static const struct got_error *
7672 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
7673 {
7674 	const struct got_error *err = NULL;
7675 	struct tog_tree_view_state *s = &view->state.tree;
7676 	struct got_tree_entry *te;
7677 	int n, nscroll = view->nlines - 3;
7678 
7679 	if (view->gline)
7680 		return tree_goto_line(view, nscroll);
7681 
7682 	switch (ch) {
7683 	case '0':
7684 	case '$':
7685 	case KEY_RIGHT:
7686 	case 'l':
7687 	case KEY_LEFT:
7688 	case 'h':
7689 		horizontal_scroll_input(view, ch);
7690 		break;
7691 	case 'i':
7692 		s->show_ids = !s->show_ids;
7693 		view->count = 0;
7694 		break;
7695 	case 'L':
7696 		view->count = 0;
7697 		if (!s->selected_entry)
7698 			break;
7699 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
7700 		break;
7701 	case 'R':
7702 		view->count = 0;
7703 		err = view_request_new(new_view, view, TOG_VIEW_REF);
7704 		break;
7705 	case 'g':
7706 	case '=':
7707 	case KEY_HOME:
7708 		s->selected = 0;
7709 		view->count = 0;
7710 		if (s->tree == s->root)
7711 			s->first_displayed_entry =
7712 			    got_object_tree_get_first_entry(s->tree);
7713 		else
7714 			s->first_displayed_entry = NULL;
7715 		break;
7716 	case 'G':
7717 	case '*':
7718 	case KEY_END: {
7719 		int eos = view->nlines - 3;
7720 
7721 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
7722 			--eos;  /* border */
7723 		s->selected = 0;
7724 		view->count = 0;
7725 		te = got_object_tree_get_last_entry(s->tree);
7726 		for (n = 0; n < eos; n++) {
7727 			if (te == NULL) {
7728 				if (s->tree != s->root) {
7729 					s->first_displayed_entry = NULL;
7730 					n++;
7731 				}
7732 				break;
7733 			}
7734 			s->first_displayed_entry = te;
7735 			te = got_tree_entry_get_prev(s->tree, te);
7736 		}
7737 		if (n > 0)
7738 			s->selected = n - 1;
7739 		break;
7740 	}
7741 	case 'k':
7742 	case KEY_UP:
7743 	case CTRL('p'):
7744 		if (s->selected > 0) {
7745 			s->selected--;
7746 			break;
7747 		}
7748 		tree_scroll_up(s, 1);
7749 		if (s->selected_entry == NULL ||
7750 		    (s->tree == s->root && s->selected_entry ==
7751 		     got_object_tree_get_first_entry(s->tree)))
7752 			view->count = 0;
7753 		break;
7754 	case CTRL('u'):
7755 	case 'u':
7756 		nscroll /= 2;
7757 		/* FALL THROUGH */
7758 	case KEY_PPAGE:
7759 	case CTRL('b'):
7760 	case 'b':
7761 		if (s->tree == s->root) {
7762 			if (got_object_tree_get_first_entry(s->tree) ==
7763 			    s->first_displayed_entry)
7764 				s->selected -= MIN(s->selected, nscroll);
7765 		} else {
7766 			if (s->first_displayed_entry == NULL)
7767 				s->selected -= MIN(s->selected, nscroll);
7768 		}
7769 		tree_scroll_up(s, MAX(0, nscroll));
7770 		if (s->selected_entry == NULL ||
7771 		    (s->tree == s->root && s->selected_entry ==
7772 		     got_object_tree_get_first_entry(s->tree)))
7773 			view->count = 0;
7774 		break;
7775 	case 'j':
7776 	case KEY_DOWN:
7777 	case CTRL('n'):
7778 		if (s->selected < s->ndisplayed - 1) {
7779 			s->selected++;
7780 			break;
7781 		}
7782 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7783 		    == NULL) {
7784 			/* can't scroll any further */
7785 			view->count = 0;
7786 			break;
7787 		}
7788 		tree_scroll_down(view, 1);
7789 		break;
7790 	case CTRL('d'):
7791 	case 'd':
7792 		nscroll /= 2;
7793 		/* FALL THROUGH */
7794 	case KEY_NPAGE:
7795 	case CTRL('f'):
7796 	case 'f':
7797 	case ' ':
7798 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
7799 		    == NULL) {
7800 			/* can't scroll any further; move cursor down */
7801 			if (s->selected < s->ndisplayed - 1)
7802 				s->selected += MIN(nscroll,
7803 				    s->ndisplayed - s->selected - 1);
7804 			else
7805 				view->count = 0;
7806 			break;
7807 		}
7808 		tree_scroll_down(view, nscroll);
7809 		break;
7810 	case KEY_ENTER:
7811 	case '\r':
7812 	case KEY_BACKSPACE:
7813 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
7814 			struct tog_parent_tree *parent;
7815 			/* user selected '..' */
7816 			if (s->tree == s->root) {
7817 				view->count = 0;
7818 				break;
7819 			}
7820 			parent = TAILQ_FIRST(&s->parents);
7821 			TAILQ_REMOVE(&s->parents, parent,
7822 			    entry);
7823 			got_object_tree_close(s->tree);
7824 			s->tree = parent->tree;
7825 			s->first_displayed_entry =
7826 			    parent->first_displayed_entry;
7827 			s->selected_entry =
7828 			    parent->selected_entry;
7829 			s->selected = parent->selected;
7830 			if (s->selected > view->nlines - 3) {
7831 				err = offset_selection_down(view);
7832 				if (err)
7833 					break;
7834 			}
7835 			free(parent);
7836 		} else if (S_ISDIR(got_tree_entry_get_mode(
7837 		    s->selected_entry))) {
7838 			struct got_tree_object *subtree;
7839 			view->count = 0;
7840 			err = got_object_open_as_tree(&subtree, s->repo,
7841 			    got_tree_entry_get_id(s->selected_entry));
7842 			if (err)
7843 				break;
7844 			err = tree_view_visit_subtree(s, subtree);
7845 			if (err) {
7846 				got_object_tree_close(subtree);
7847 				break;
7848 			}
7849 		} else if (S_ISREG(got_tree_entry_get_mode(s->selected_entry)))
7850 			err = view_request_new(new_view, view, TOG_VIEW_BLAME);
7851 		break;
7852 	case KEY_RESIZE:
7853 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
7854 			s->selected = view->nlines - 4;
7855 		view->count = 0;
7856 		break;
7857 	default:
7858 		view->count = 0;
7859 		break;
7860 	}
7861 
7862 	return err;
7863 }
7864 
7865 __dead static void
7866 usage_tree(void)
7867 {
7868 	endwin();
7869 	fprintf(stderr,
7870 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
7871 	    getprogname());
7872 	exit(1);
7873 }
7874 
7875 static const struct got_error *
7876 cmd_tree(int argc, char *argv[])
7877 {
7878 	const struct got_error *error;
7879 	struct got_repository *repo = NULL;
7880 	struct got_worktree *worktree = NULL;
7881 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7882 	struct got_object_id *commit_id = NULL;
7883 	struct got_commit_object *commit = NULL;
7884 	const char *commit_id_arg = NULL;
7885 	char *label = NULL;
7886 	struct got_reference *ref = NULL;
7887 	const char *head_ref_name = NULL;
7888 	int ch;
7889 	struct tog_view *view;
7890 	int *pack_fds = NULL;
7891 
7892 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
7893 		switch (ch) {
7894 		case 'c':
7895 			commit_id_arg = optarg;
7896 			break;
7897 		case 'r':
7898 			repo_path = realpath(optarg, NULL);
7899 			if (repo_path == NULL)
7900 				return got_error_from_errno2("realpath",
7901 				    optarg);
7902 			break;
7903 		default:
7904 			usage_tree();
7905 			/* NOTREACHED */
7906 		}
7907 	}
7908 
7909 	argc -= optind;
7910 	argv += optind;
7911 
7912 	if (argc > 1)
7913 		usage_tree();
7914 
7915 	error = got_repo_pack_fds_open(&pack_fds);
7916 	if (error != NULL)
7917 		goto done;
7918 
7919 	if (repo_path == NULL) {
7920 		cwd = getcwd(NULL, 0);
7921 		if (cwd == NULL)
7922 			return got_error_from_errno("getcwd");
7923 		error = got_worktree_open(&worktree, cwd);
7924 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7925 			goto done;
7926 		if (worktree)
7927 			repo_path =
7928 			    strdup(got_worktree_get_repo_path(worktree));
7929 		else
7930 			repo_path = strdup(cwd);
7931 		if (repo_path == NULL) {
7932 			error = got_error_from_errno("strdup");
7933 			goto done;
7934 		}
7935 	}
7936 
7937 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7938 	if (error != NULL)
7939 		goto done;
7940 
7941 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7942 	    repo, worktree);
7943 	if (error)
7944 		goto done;
7945 
7946 	init_curses();
7947 
7948 	error = apply_unveil(got_repo_get_path(repo), NULL);
7949 	if (error)
7950 		goto done;
7951 
7952 	error = tog_load_refs(repo, 0);
7953 	if (error)
7954 		goto done;
7955 
7956 	if (commit_id_arg == NULL) {
7957 		error = got_repo_match_object_id(&commit_id, &label,
7958 		    worktree ? got_worktree_get_head_ref_name(worktree) :
7959 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7960 		if (error)
7961 			goto done;
7962 		head_ref_name = label;
7963 	} else {
7964 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
7965 		if (error == NULL)
7966 			head_ref_name = got_ref_get_name(ref);
7967 		else if (error->code != GOT_ERR_NOT_REF)
7968 			goto done;
7969 		error = got_repo_match_object_id(&commit_id, NULL,
7970 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7971 		if (error)
7972 			goto done;
7973 	}
7974 
7975 	error = got_object_open_as_commit(&commit, repo, commit_id);
7976 	if (error)
7977 		goto done;
7978 
7979 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
7980 	if (view == NULL) {
7981 		error = got_error_from_errno("view_open");
7982 		goto done;
7983 	}
7984 	error = open_tree_view(view, commit_id, head_ref_name, repo);
7985 	if (error)
7986 		goto done;
7987 	if (!got_path_is_root_dir(in_repo_path)) {
7988 		error = tree_view_walk_path(&view->state.tree, commit,
7989 		    in_repo_path);
7990 		if (error)
7991 			goto done;
7992 	}
7993 
7994 	if (worktree) {
7995 		/* Release work tree lock. */
7996 		got_worktree_close(worktree);
7997 		worktree = NULL;
7998 	}
7999 	error = view_loop(view);
8000 done:
8001 	free(repo_path);
8002 	free(cwd);
8003 	free(commit_id);
8004 	free(label);
8005 	if (ref)
8006 		got_ref_close(ref);
8007 	if (repo) {
8008 		const struct got_error *close_err = got_repo_close(repo);
8009 		if (error == NULL)
8010 			error = close_err;
8011 	}
8012 	if (pack_fds) {
8013 		const struct got_error *pack_err =
8014 		    got_repo_pack_fds_close(pack_fds);
8015 		if (error == NULL)
8016 			error = pack_err;
8017 	}
8018 	tog_free_refs();
8019 	return error;
8020 }
8021 
8022 static const struct got_error *
8023 ref_view_load_refs(struct tog_ref_view_state *s)
8024 {
8025 	struct got_reflist_entry *sre;
8026 	struct tog_reflist_entry *re;
8027 
8028 	s->nrefs = 0;
8029 	TAILQ_FOREACH(sre, &tog_refs, entry) {
8030 		if (strncmp(got_ref_get_name(sre->ref),
8031 		    "refs/got/", 9) == 0 &&
8032 		    strncmp(got_ref_get_name(sre->ref),
8033 		    "refs/got/backup/", 16) != 0)
8034 			continue;
8035 
8036 		re = malloc(sizeof(*re));
8037 		if (re == NULL)
8038 			return got_error_from_errno("malloc");
8039 
8040 		re->ref = got_ref_dup(sre->ref);
8041 		if (re->ref == NULL)
8042 			return got_error_from_errno("got_ref_dup");
8043 		re->idx = s->nrefs++;
8044 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
8045 	}
8046 
8047 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
8048 	return NULL;
8049 }
8050 
8051 static void
8052 ref_view_free_refs(struct tog_ref_view_state *s)
8053 {
8054 	struct tog_reflist_entry *re;
8055 
8056 	while (!TAILQ_EMPTY(&s->refs)) {
8057 		re = TAILQ_FIRST(&s->refs);
8058 		TAILQ_REMOVE(&s->refs, re, entry);
8059 		got_ref_close(re->ref);
8060 		free(re);
8061 	}
8062 }
8063 
8064 static const struct got_error *
8065 open_ref_view(struct tog_view *view, struct got_repository *repo)
8066 {
8067 	const struct got_error *err = NULL;
8068 	struct tog_ref_view_state *s = &view->state.ref;
8069 
8070 	s->selected_entry = 0;
8071 	s->repo = repo;
8072 
8073 	TAILQ_INIT(&s->refs);
8074 	STAILQ_INIT(&s->colors);
8075 
8076 	err = ref_view_load_refs(s);
8077 	if (err)
8078 		goto done;
8079 
8080 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
8081 		err = add_color(&s->colors, "^refs/heads/",
8082 		    TOG_COLOR_REFS_HEADS,
8083 		    get_color_value("TOG_COLOR_REFS_HEADS"));
8084 		if (err)
8085 			goto done;
8086 
8087 		err = add_color(&s->colors, "^refs/tags/",
8088 		    TOG_COLOR_REFS_TAGS,
8089 		    get_color_value("TOG_COLOR_REFS_TAGS"));
8090 		if (err)
8091 			goto done;
8092 
8093 		err = add_color(&s->colors, "^refs/remotes/",
8094 		    TOG_COLOR_REFS_REMOTES,
8095 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
8096 		if (err)
8097 			goto done;
8098 
8099 		err = add_color(&s->colors, "^refs/got/backup/",
8100 		    TOG_COLOR_REFS_BACKUP,
8101 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
8102 		if (err)
8103 			goto done;
8104 	}
8105 
8106 	view->show = show_ref_view;
8107 	view->input = input_ref_view;
8108 	view->close = close_ref_view;
8109 	view->search_start = search_start_ref_view;
8110 	view->search_next = search_next_ref_view;
8111 done:
8112 	if (err) {
8113 		if (view->close == NULL)
8114 			close_ref_view(view);
8115 		view_close(view);
8116 	}
8117 	return err;
8118 }
8119 
8120 static const struct got_error *
8121 close_ref_view(struct tog_view *view)
8122 {
8123 	struct tog_ref_view_state *s = &view->state.ref;
8124 
8125 	ref_view_free_refs(s);
8126 	free_colors(&s->colors);
8127 
8128 	return NULL;
8129 }
8130 
8131 static const struct got_error *
8132 resolve_reflist_entry(struct got_object_id **commit_id,
8133     struct tog_reflist_entry *re, struct got_repository *repo)
8134 {
8135 	const struct got_error *err = NULL;
8136 	struct got_object_id *obj_id;
8137 	struct got_tag_object *tag = NULL;
8138 	int obj_type;
8139 
8140 	*commit_id = NULL;
8141 
8142 	err = got_ref_resolve(&obj_id, repo, re->ref);
8143 	if (err)
8144 		return err;
8145 
8146 	err = got_object_get_type(&obj_type, repo, obj_id);
8147 	if (err)
8148 		goto done;
8149 
8150 	switch (obj_type) {
8151 	case GOT_OBJ_TYPE_COMMIT:
8152 		*commit_id = obj_id;
8153 		break;
8154 	case GOT_OBJ_TYPE_TAG:
8155 		err = got_object_open_as_tag(&tag, repo, obj_id);
8156 		if (err)
8157 			goto done;
8158 		free(obj_id);
8159 		err = got_object_get_type(&obj_type, repo,
8160 		    got_object_tag_get_object_id(tag));
8161 		if (err)
8162 			goto done;
8163 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
8164 			err = got_error(GOT_ERR_OBJ_TYPE);
8165 			goto done;
8166 		}
8167 		*commit_id = got_object_id_dup(
8168 		    got_object_tag_get_object_id(tag));
8169 		if (*commit_id == NULL) {
8170 			err = got_error_from_errno("got_object_id_dup");
8171 			goto done;
8172 		}
8173 		break;
8174 	default:
8175 		err = got_error(GOT_ERR_OBJ_TYPE);
8176 		break;
8177 	}
8178 
8179 done:
8180 	if (tag)
8181 		got_object_tag_close(tag);
8182 	if (err) {
8183 		free(*commit_id);
8184 		*commit_id = NULL;
8185 	}
8186 	return err;
8187 }
8188 
8189 static const struct got_error *
8190 log_ref_entry(struct tog_view **new_view, int begin_y, int begin_x,
8191     struct tog_reflist_entry *re, struct got_repository *repo)
8192 {
8193 	struct tog_view *log_view;
8194 	const struct got_error *err = NULL;
8195 	struct got_object_id *commit_id = NULL;
8196 
8197 	*new_view = NULL;
8198 
8199 	err = resolve_reflist_entry(&commit_id, re, repo);
8200 	if (err) {
8201 		if (err->code != GOT_ERR_OBJ_TYPE)
8202 			return err;
8203 		else
8204 			return NULL;
8205 	}
8206 
8207 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
8208 	if (log_view == NULL) {
8209 		err = got_error_from_errno("view_open");
8210 		goto done;
8211 	}
8212 
8213 	err = open_log_view(log_view, commit_id, repo,
8214 	    got_ref_get_name(re->ref), "", 0);
8215 done:
8216 	if (err)
8217 		view_close(log_view);
8218 	else
8219 		*new_view = log_view;
8220 	free(commit_id);
8221 	return err;
8222 }
8223 
8224 static void
8225 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
8226 {
8227 	struct tog_reflist_entry *re;
8228 	int i = 0;
8229 
8230 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
8231 		return;
8232 
8233 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
8234 	while (i++ < maxscroll) {
8235 		if (re == NULL)
8236 			break;
8237 		s->first_displayed_entry = re;
8238 		re = TAILQ_PREV(re, tog_reflist_head, entry);
8239 	}
8240 }
8241 
8242 static const struct got_error *
8243 ref_scroll_down(struct tog_view *view, int maxscroll)
8244 {
8245 	struct tog_ref_view_state *s = &view->state.ref;
8246 	struct tog_reflist_entry *next, *last;
8247 	int n = 0;
8248 
8249 	if (s->first_displayed_entry)
8250 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
8251 	else
8252 		next = TAILQ_FIRST(&s->refs);
8253 
8254 	last = s->last_displayed_entry;
8255 	while (next && n++ < maxscroll) {
8256 		if (last) {
8257 			s->last_displayed_entry = last;
8258 			last = TAILQ_NEXT(last, entry);
8259 		}
8260 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN)) {
8261 			s->first_displayed_entry = next;
8262 			next = TAILQ_NEXT(next, entry);
8263 		}
8264 	}
8265 
8266 	return NULL;
8267 }
8268 
8269 static const struct got_error *
8270 search_start_ref_view(struct tog_view *view)
8271 {
8272 	struct tog_ref_view_state *s = &view->state.ref;
8273 
8274 	s->matched_entry = NULL;
8275 	return NULL;
8276 }
8277 
8278 static int
8279 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
8280 {
8281 	regmatch_t regmatch;
8282 
8283 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
8284 	    0) == 0;
8285 }
8286 
8287 static const struct got_error *
8288 search_next_ref_view(struct tog_view *view)
8289 {
8290 	struct tog_ref_view_state *s = &view->state.ref;
8291 	struct tog_reflist_entry *re = NULL;
8292 
8293 	if (!view->searching) {
8294 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
8295 		return NULL;
8296 	}
8297 
8298 	if (s->matched_entry) {
8299 		if (view->searching == TOG_SEARCH_FORWARD) {
8300 			if (s->selected_entry)
8301 				re = TAILQ_NEXT(s->selected_entry, entry);
8302 			else
8303 				re = TAILQ_PREV(s->selected_entry,
8304 				    tog_reflist_head, entry);
8305 		} else {
8306 			if (s->selected_entry == NULL)
8307 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
8308 			else
8309 				re = TAILQ_PREV(s->selected_entry,
8310 				    tog_reflist_head, entry);
8311 		}
8312 	} else {
8313 		if (s->selected_entry)
8314 			re = s->selected_entry;
8315 		else if (view->searching == TOG_SEARCH_FORWARD)
8316 			re = TAILQ_FIRST(&s->refs);
8317 		else
8318 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
8319 	}
8320 
8321 	while (1) {
8322 		if (re == NULL) {
8323 			if (s->matched_entry == NULL) {
8324 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
8325 				return NULL;
8326 			}
8327 			if (view->searching == TOG_SEARCH_FORWARD)
8328 				re = TAILQ_FIRST(&s->refs);
8329 			else
8330 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
8331 		}
8332 
8333 		if (match_reflist_entry(re, &view->regex)) {
8334 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
8335 			s->matched_entry = re;
8336 			break;
8337 		}
8338 
8339 		if (view->searching == TOG_SEARCH_FORWARD)
8340 			re = TAILQ_NEXT(re, entry);
8341 		else
8342 			re = TAILQ_PREV(re, tog_reflist_head, entry);
8343 	}
8344 
8345 	if (s->matched_entry) {
8346 		s->first_displayed_entry = s->matched_entry;
8347 		s->selected = 0;
8348 	}
8349 
8350 	return NULL;
8351 }
8352 
8353 static const struct got_error *
8354 show_ref_view(struct tog_view *view)
8355 {
8356 	const struct got_error *err = NULL;
8357 	struct tog_ref_view_state *s = &view->state.ref;
8358 	struct tog_reflist_entry *re;
8359 	char *line = NULL;
8360 	wchar_t *wline;
8361 	struct tog_color *tc;
8362 	int width, n, scrollx;
8363 	int limit = view->nlines;
8364 
8365 	werase(view->window);
8366 
8367 	s->ndisplayed = 0;
8368 	if (view_is_hsplit_top(view))
8369 		--limit;  /* border */
8370 
8371 	if (limit == 0)
8372 		return NULL;
8373 
8374 	re = s->first_displayed_entry;
8375 
8376 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
8377 	    s->nrefs) == -1)
8378 		return got_error_from_errno("asprintf");
8379 
8380 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
8381 	if (err) {
8382 		free(line);
8383 		return err;
8384 	}
8385 	if (view_needs_focus_indication(view))
8386 		wstandout(view->window);
8387 	waddwstr(view->window, wline);
8388 	while (width++ < view->ncols)
8389 		waddch(view->window, ' ');
8390 	if (view_needs_focus_indication(view))
8391 		wstandend(view->window);
8392 	free(wline);
8393 	wline = NULL;
8394 	free(line);
8395 	line = NULL;
8396 	if (--limit <= 0)
8397 		return NULL;
8398 
8399 	n = 0;
8400 	view->maxx = 0;
8401 	while (re && limit > 0) {
8402 		char *line = NULL;
8403 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
8404 
8405 		if (s->show_date) {
8406 			struct got_commit_object *ci;
8407 			struct got_tag_object *tag;
8408 			struct got_object_id *id;
8409 			struct tm tm;
8410 			time_t t;
8411 
8412 			err = got_ref_resolve(&id, s->repo, re->ref);
8413 			if (err)
8414 				return err;
8415 			err = got_object_open_as_tag(&tag, s->repo, id);
8416 			if (err) {
8417 				if (err->code != GOT_ERR_OBJ_TYPE) {
8418 					free(id);
8419 					return err;
8420 				}
8421 				err = got_object_open_as_commit(&ci, s->repo,
8422 				    id);
8423 				if (err) {
8424 					free(id);
8425 					return err;
8426 				}
8427 				t = got_object_commit_get_committer_time(ci);
8428 				got_object_commit_close(ci);
8429 			} else {
8430 				t = got_object_tag_get_tagger_time(tag);
8431 				got_object_tag_close(tag);
8432 			}
8433 			free(id);
8434 			if (gmtime_r(&t, &tm) == NULL)
8435 				return got_error_from_errno("gmtime_r");
8436 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
8437 				return got_error(GOT_ERR_NO_SPACE);
8438 		}
8439 		if (got_ref_is_symbolic(re->ref)) {
8440 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
8441 			    ymd : "", got_ref_get_name(re->ref),
8442 			    got_ref_get_symref_target(re->ref)) == -1)
8443 				return got_error_from_errno("asprintf");
8444 		} else if (s->show_ids) {
8445 			struct got_object_id *id;
8446 			char *id_str;
8447 			err = got_ref_resolve(&id, s->repo, re->ref);
8448 			if (err)
8449 				return err;
8450 			err = got_object_id_str(&id_str, id);
8451 			if (err) {
8452 				free(id);
8453 				return err;
8454 			}
8455 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
8456 			    got_ref_get_name(re->ref), id_str) == -1) {
8457 				err = got_error_from_errno("asprintf");
8458 				free(id);
8459 				free(id_str);
8460 				return err;
8461 			}
8462 			free(id);
8463 			free(id_str);
8464 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
8465 		    got_ref_get_name(re->ref)) == -1)
8466 			return got_error_from_errno("asprintf");
8467 
8468 		/* use full line width to determine view->maxx */
8469 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0, 0);
8470 		if (err) {
8471 			free(line);
8472 			return err;
8473 		}
8474 		view->maxx = MAX(view->maxx, width);
8475 		free(wline);
8476 		wline = NULL;
8477 
8478 		err = format_line(&wline, &width, &scrollx, line, view->x,
8479 		    view->ncols, 0, 0);
8480 		if (err) {
8481 			free(line);
8482 			return err;
8483 		}
8484 		if (n == s->selected) {
8485 			if (view->focussed)
8486 				wstandout(view->window);
8487 			s->selected_entry = re;
8488 		}
8489 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
8490 		if (tc)
8491 			wattr_on(view->window,
8492 			    COLOR_PAIR(tc->colorpair), NULL);
8493 		waddwstr(view->window, &wline[scrollx]);
8494 		if (tc)
8495 			wattr_off(view->window,
8496 			    COLOR_PAIR(tc->colorpair), NULL);
8497 		if (width < view->ncols)
8498 			waddch(view->window, '\n');
8499 		if (n == s->selected && view->focussed)
8500 			wstandend(view->window);
8501 		free(line);
8502 		free(wline);
8503 		wline = NULL;
8504 		n++;
8505 		s->ndisplayed++;
8506 		s->last_displayed_entry = re;
8507 
8508 		limit--;
8509 		re = TAILQ_NEXT(re, entry);
8510 	}
8511 
8512 	view_border(view);
8513 	return err;
8514 }
8515 
8516 static const struct got_error *
8517 browse_ref_tree(struct tog_view **new_view, int begin_y, int begin_x,
8518     struct tog_reflist_entry *re, struct got_repository *repo)
8519 {
8520 	const struct got_error *err = NULL;
8521 	struct got_object_id *commit_id = NULL;
8522 	struct tog_view *tree_view;
8523 
8524 	*new_view = NULL;
8525 
8526 	err = resolve_reflist_entry(&commit_id, re, repo);
8527 	if (err) {
8528 		if (err->code != GOT_ERR_OBJ_TYPE)
8529 			return err;
8530 		else
8531 			return NULL;
8532 	}
8533 
8534 
8535 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
8536 	if (tree_view == NULL) {
8537 		err = got_error_from_errno("view_open");
8538 		goto done;
8539 	}
8540 
8541 	err = open_tree_view(tree_view, commit_id,
8542 	    got_ref_get_name(re->ref), repo);
8543 	if (err)
8544 		goto done;
8545 
8546 	*new_view = tree_view;
8547 done:
8548 	free(commit_id);
8549 	return err;
8550 }
8551 
8552 static const struct got_error *
8553 ref_goto_line(struct tog_view *view, int nlines)
8554 {
8555 	const struct got_error		*err = NULL;
8556 	struct tog_ref_view_state	*s = &view->state.ref;
8557 	int				 g, idx = s->selected_entry->idx;
8558 
8559 	g = view->gline;
8560 	view->gline = 0;
8561 
8562 	if (g == 0)
8563 		g = 1;
8564 	else if (g > s->nrefs)
8565 		g = s->nrefs;
8566 
8567 	if (g >= s->first_displayed_entry->idx + 1 &&
8568 	    g <= s->last_displayed_entry->idx + 1 &&
8569 	    g - s->first_displayed_entry->idx - 1 < nlines) {
8570 		s->selected = g - s->first_displayed_entry->idx - 1;
8571 		return NULL;
8572 	}
8573 
8574 	if (idx + 1 < g) {
8575 		err = ref_scroll_down(view, g - idx - 1);
8576 		if (err)
8577 			return err;
8578 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL &&
8579 		    s->first_displayed_entry->idx + s->selected < g &&
8580 		    s->selected < s->ndisplayed - 1)
8581 			s->selected = g - s->first_displayed_entry->idx - 1;
8582 	} else if (idx + 1 > g)
8583 		ref_scroll_up(s, idx - g + 1);
8584 
8585 	if (g < nlines && s->first_displayed_entry->idx == 0)
8586 		s->selected = g - 1;
8587 
8588 	return NULL;
8589 
8590 }
8591 
8592 static const struct got_error *
8593 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
8594 {
8595 	const struct got_error *err = NULL;
8596 	struct tog_ref_view_state *s = &view->state.ref;
8597 	struct tog_reflist_entry *re;
8598 	int n, nscroll = view->nlines - 1;
8599 
8600 	if (view->gline)
8601 		return ref_goto_line(view, nscroll);
8602 
8603 	switch (ch) {
8604 	case '0':
8605 	case '$':
8606 	case KEY_RIGHT:
8607 	case 'l':
8608 	case KEY_LEFT:
8609 	case 'h':
8610 		horizontal_scroll_input(view, ch);
8611 		break;
8612 	case 'i':
8613 		s->show_ids = !s->show_ids;
8614 		view->count = 0;
8615 		break;
8616 	case 'm':
8617 		s->show_date = !s->show_date;
8618 		view->count = 0;
8619 		break;
8620 	case 'o':
8621 		s->sort_by_date = !s->sort_by_date;
8622 		view->action = s->sort_by_date ? "sort by date" : "sort by name";
8623 		view->count = 0;
8624 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
8625 		    got_ref_cmp_by_commit_timestamp_descending :
8626 		    tog_ref_cmp_by_name, s->repo);
8627 		if (err)
8628 			break;
8629 		got_reflist_object_id_map_free(tog_refs_idmap);
8630 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
8631 		    &tog_refs, s->repo);
8632 		if (err)
8633 			break;
8634 		ref_view_free_refs(s);
8635 		err = ref_view_load_refs(s);
8636 		break;
8637 	case KEY_ENTER:
8638 	case '\r':
8639 		view->count = 0;
8640 		if (!s->selected_entry)
8641 			break;
8642 		err = view_request_new(new_view, view, TOG_VIEW_LOG);
8643 		break;
8644 	case 'T':
8645 		view->count = 0;
8646 		if (!s->selected_entry)
8647 			break;
8648 		err = view_request_new(new_view, view, TOG_VIEW_TREE);
8649 		break;
8650 	case 'g':
8651 	case '=':
8652 	case KEY_HOME:
8653 		s->selected = 0;
8654 		view->count = 0;
8655 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
8656 		break;
8657 	case 'G':
8658 	case '*':
8659 	case KEY_END: {
8660 		int eos = view->nlines - 1;
8661 
8662 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
8663 			--eos;  /* border */
8664 		s->selected = 0;
8665 		view->count = 0;
8666 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
8667 		for (n = 0; n < eos; n++) {
8668 			if (re == NULL)
8669 				break;
8670 			s->first_displayed_entry = re;
8671 			re = TAILQ_PREV(re, tog_reflist_head, entry);
8672 		}
8673 		if (n > 0)
8674 			s->selected = n - 1;
8675 		break;
8676 	}
8677 	case 'k':
8678 	case KEY_UP:
8679 	case CTRL('p'):
8680 		if (s->selected > 0) {
8681 			s->selected--;
8682 			break;
8683 		}
8684 		ref_scroll_up(s, 1);
8685 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
8686 			view->count = 0;
8687 		break;
8688 	case CTRL('u'):
8689 	case 'u':
8690 		nscroll /= 2;
8691 		/* FALL THROUGH */
8692 	case KEY_PPAGE:
8693 	case CTRL('b'):
8694 	case 'b':
8695 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
8696 			s->selected -= MIN(nscroll, s->selected);
8697 		ref_scroll_up(s, MAX(0, nscroll));
8698 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
8699 			view->count = 0;
8700 		break;
8701 	case 'j':
8702 	case KEY_DOWN:
8703 	case CTRL('n'):
8704 		if (s->selected < s->ndisplayed - 1) {
8705 			s->selected++;
8706 			break;
8707 		}
8708 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
8709 			/* can't scroll any further */
8710 			view->count = 0;
8711 			break;
8712 		}
8713 		ref_scroll_down(view, 1);
8714 		break;
8715 	case CTRL('d'):
8716 	case 'd':
8717 		nscroll /= 2;
8718 		/* FALL THROUGH */
8719 	case KEY_NPAGE:
8720 	case CTRL('f'):
8721 	case 'f':
8722 	case ' ':
8723 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
8724 			/* can't scroll any further; move cursor down */
8725 			if (s->selected < s->ndisplayed - 1)
8726 				s->selected += MIN(nscroll,
8727 				    s->ndisplayed - s->selected - 1);
8728 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
8729 				s->selected += s->ndisplayed - s->selected - 1;
8730 			view->count = 0;
8731 			break;
8732 		}
8733 		ref_scroll_down(view, nscroll);
8734 		break;
8735 	case CTRL('l'):
8736 		view->count = 0;
8737 		tog_free_refs();
8738 		err = tog_load_refs(s->repo, s->sort_by_date);
8739 		if (err)
8740 			break;
8741 		ref_view_free_refs(s);
8742 		err = ref_view_load_refs(s);
8743 		break;
8744 	case KEY_RESIZE:
8745 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
8746 			s->selected = view->nlines - 2;
8747 		break;
8748 	default:
8749 		view->count = 0;
8750 		break;
8751 	}
8752 
8753 	return err;
8754 }
8755 
8756 __dead static void
8757 usage_ref(void)
8758 {
8759 	endwin();
8760 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
8761 	    getprogname());
8762 	exit(1);
8763 }
8764 
8765 static const struct got_error *
8766 cmd_ref(int argc, char *argv[])
8767 {
8768 	const struct got_error *error;
8769 	struct got_repository *repo = NULL;
8770 	struct got_worktree *worktree = NULL;
8771 	char *cwd = NULL, *repo_path = NULL;
8772 	int ch;
8773 	struct tog_view *view;
8774 	int *pack_fds = NULL;
8775 
8776 	while ((ch = getopt(argc, argv, "r:")) != -1) {
8777 		switch (ch) {
8778 		case 'r':
8779 			repo_path = realpath(optarg, NULL);
8780 			if (repo_path == NULL)
8781 				return got_error_from_errno2("realpath",
8782 				    optarg);
8783 			break;
8784 		default:
8785 			usage_ref();
8786 			/* NOTREACHED */
8787 		}
8788 	}
8789 
8790 	argc -= optind;
8791 	argv += optind;
8792 
8793 	if (argc > 1)
8794 		usage_ref();
8795 
8796 	error = got_repo_pack_fds_open(&pack_fds);
8797 	if (error != NULL)
8798 		goto done;
8799 
8800 	if (repo_path == NULL) {
8801 		cwd = getcwd(NULL, 0);
8802 		if (cwd == NULL)
8803 			return got_error_from_errno("getcwd");
8804 		error = got_worktree_open(&worktree, cwd);
8805 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
8806 			goto done;
8807 		if (worktree)
8808 			repo_path =
8809 			    strdup(got_worktree_get_repo_path(worktree));
8810 		else
8811 			repo_path = strdup(cwd);
8812 		if (repo_path == NULL) {
8813 			error = got_error_from_errno("strdup");
8814 			goto done;
8815 		}
8816 	}
8817 
8818 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8819 	if (error != NULL)
8820 		goto done;
8821 
8822 	init_curses();
8823 
8824 	error = apply_unveil(got_repo_get_path(repo), NULL);
8825 	if (error)
8826 		goto done;
8827 
8828 	error = tog_load_refs(repo, 0);
8829 	if (error)
8830 		goto done;
8831 
8832 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
8833 	if (view == NULL) {
8834 		error = got_error_from_errno("view_open");
8835 		goto done;
8836 	}
8837 
8838 	error = open_ref_view(view, repo);
8839 	if (error)
8840 		goto done;
8841 
8842 	if (worktree) {
8843 		/* Release work tree lock. */
8844 		got_worktree_close(worktree);
8845 		worktree = NULL;
8846 	}
8847 	error = view_loop(view);
8848 done:
8849 	free(repo_path);
8850 	free(cwd);
8851 	if (repo) {
8852 		const struct got_error *close_err = got_repo_close(repo);
8853 		if (close_err)
8854 			error = close_err;
8855 	}
8856 	if (pack_fds) {
8857 		const struct got_error *pack_err =
8858 		    got_repo_pack_fds_close(pack_fds);
8859 		if (error == NULL)
8860 			error = pack_err;
8861 	}
8862 	tog_free_refs();
8863 	return error;
8864 }
8865 
8866 static const struct got_error*
8867 win_draw_center(WINDOW *win, size_t y, size_t x, size_t maxx, int focus,
8868     const char *str)
8869 {
8870 	size_t len;
8871 
8872 	if (win == NULL)
8873 		win = stdscr;
8874 
8875 	len = strlen(str);
8876 	x = x ? x : maxx > len ? (maxx - len) / 2 : 0;
8877 
8878 	if (focus)
8879 		wstandout(win);
8880 	if (mvwprintw(win, y, x, "%s", str) == ERR)
8881 		return got_error_msg(GOT_ERR_RANGE, "mvwprintw");
8882 	if (focus)
8883 		wstandend(win);
8884 
8885 	return NULL;
8886 }
8887 
8888 static const struct got_error *
8889 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
8890 {
8891 	off_t *p;
8892 
8893 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
8894 	if (p == NULL) {
8895 		free(*line_offsets);
8896 		*line_offsets = NULL;
8897 		return got_error_from_errno("reallocarray");
8898 	}
8899 
8900 	*line_offsets = p;
8901 	(*line_offsets)[*nlines] = off;
8902 	++(*nlines);
8903 	return NULL;
8904 }
8905 
8906 static const struct got_error *
8907 max_key_str(int *ret, const struct tog_key_map *km, size_t n)
8908 {
8909 	*ret = 0;
8910 
8911 	for (;n > 0; --n, ++km) {
8912 		char	*t0, *t, *k;
8913 		size_t	 len = 1;
8914 
8915 		if (km->keys == NULL)
8916 			continue;
8917 
8918 		t = t0 = strdup(km->keys);
8919 		if (t0 == NULL)
8920 			return got_error_from_errno("strdup");
8921 
8922 		len += strlen(t);
8923 		while ((k = strsep(&t, " ")) != NULL)
8924 			len += strlen(k) > 1 ? 2 : 0;
8925 		free(t0);
8926 		*ret = MAX(*ret, len);
8927 	}
8928 
8929 	return NULL;
8930 }
8931 
8932 /*
8933  * Write keymap section headers, keys, and key info in km to f.
8934  * Save line offset to *off. If terminal has UTF8 encoding enabled,
8935  * wrap control and symbolic keys in guillemets, else use <>.
8936  */
8937 static const struct got_error *
8938 format_help_line(off_t *off, FILE *f, const struct tog_key_map *km, int width)
8939 {
8940 	int n, len = width;
8941 
8942 	if (km->keys) {
8943 		static const char *u8_glyph[] = {
8944 			"\xe2\x80\xb9", /* U+2039  (utf8 <) */
8945 			"\xe2\x80\xba"  /* U+203A  (utf8 >) */
8946 		};
8947 		char	*t0, *t, *k;
8948 		int	 cs, s, first = 1;
8949 
8950 		cs = got_locale_is_utf8();
8951 
8952 		t = t0 = strdup(km->keys);
8953 		if (t0 == NULL)
8954 			return got_error_from_errno("strdup");
8955 
8956 		len = strlen(km->keys);
8957 		while ((k = strsep(&t, " ")) != NULL) {
8958 			s = strlen(k) > 1;  /* control or symbolic key */
8959 			n = fprintf(f, "%s%s%s%s%s", first ? "  " : "",
8960 			    cs && s ? u8_glyph[0] : s ? "<" : "", k,
8961 			    cs && s ? u8_glyph[1] : s ? ">" : "", t ? " " : "");
8962 			if (n < 0) {
8963 				free(t0);
8964 				return got_error_from_errno("fprintf");
8965 			}
8966 			first = 0;
8967 			len += s ? 2 : 0;
8968 			*off += n;
8969 		}
8970 		free(t0);
8971 	}
8972 	n = fprintf(f, "%*s%s\n", width - len, width - len ? " " : "", km->info);
8973 	if (n < 0)
8974 		return got_error_from_errno("fprintf");
8975 	*off += n;
8976 
8977 	return NULL;
8978 }
8979 
8980 static const struct got_error *
8981 format_help(struct tog_help_view_state *s)
8982 {
8983 	const struct got_error		*err = NULL;
8984 	off_t				 off = 0;
8985 	int				 i, max, n, show = s->all;
8986 	static const struct tog_key_map	 km[] = {
8987 #define KEYMAP_(info, type)	{ NULL, (info), type }
8988 #define KEY_(keys, info)	{ (keys), (info), TOG_KEYMAP_KEYS }
8989 		GENERATE_HELP
8990 #undef KEYMAP_
8991 #undef KEY_
8992 	};
8993 
8994 	err = add_line_offset(&s->line_offsets, &s->nlines, 0);
8995 	if (err)
8996 		return err;
8997 
8998 	n = nitems(km);
8999 	err = max_key_str(&max, km, n);
9000 	if (err)
9001 		return err;
9002 
9003 	for (i = 0; i < n; ++i) {
9004 		if (km[i].keys == NULL) {
9005 			show = s->all;
9006 			if (km[i].type == TOG_KEYMAP_GLOBAL ||
9007 			    km[i].type == s->type || s->all)
9008 				show = 1;
9009 		}
9010 		if (show) {
9011 			err = format_help_line(&off, s->f, &km[i], max);
9012 			if (err)
9013 				return err;
9014 			err = add_line_offset(&s->line_offsets, &s->nlines, off);
9015 			if (err)
9016 				return err;
9017 		}
9018 	}
9019 	fputc('\n', s->f);
9020 	++off;
9021 	err = add_line_offset(&s->line_offsets, &s->nlines, off);
9022 	return err;
9023 }
9024 
9025 static const struct got_error *
9026 create_help(struct tog_help_view_state *s)
9027 {
9028 	FILE			*f;
9029 	const struct got_error	*err;
9030 
9031 	free(s->line_offsets);
9032 	s->line_offsets = NULL;
9033 	s->nlines = 0;
9034 
9035 	f = got_opentemp();
9036 	if (f == NULL)
9037 		return got_error_from_errno("got_opentemp");
9038 	s->f = f;
9039 
9040 	err = format_help(s);
9041 	if (err)
9042 		return err;
9043 
9044 	if (s->f && fflush(s->f) != 0)
9045 		return got_error_from_errno("fflush");
9046 
9047 	return NULL;
9048 }
9049 
9050 static const struct got_error *
9051 search_start_help_view(struct tog_view *view)
9052 {
9053 	view->state.help.matched_line = 0;
9054 	return NULL;
9055 }
9056 
9057 static void
9058 search_setup_help_view(struct tog_view *view, FILE **f, off_t **line_offsets,
9059     size_t *nlines, int **first, int **last, int **match, int **selected)
9060 {
9061 	struct tog_help_view_state *s = &view->state.help;
9062 
9063 	*f = s->f;
9064 	*nlines = s->nlines;
9065 	*line_offsets = s->line_offsets;
9066 	*match = &s->matched_line;
9067 	*first = &s->first_displayed_line;
9068 	*last = &s->last_displayed_line;
9069 	*selected = &s->selected_line;
9070 }
9071 
9072 static const struct got_error *
9073 show_help_view(struct tog_view *view)
9074 {
9075 	struct tog_help_view_state	*s = &view->state.help;
9076 	const struct got_error		*err;
9077 	regmatch_t			*regmatch = &view->regmatch;
9078 	wchar_t				*wline;
9079 	char				*line;
9080 	ssize_t				 linelen;
9081 	size_t				 linesz = 0;
9082 	int				 width, nprinted = 0, rc = 0;
9083 	int				 eos = view->nlines;
9084 
9085 	if (view_is_hsplit_top(view))
9086 		--eos;  /* account for border */
9087 
9088 	s->lineno = 0;
9089 	rewind(s->f);
9090 	werase(view->window);
9091 
9092 	if (view->gline > s->nlines - 1)
9093 		view->gline = s->nlines - 1;
9094 
9095 	err = win_draw_center(view->window, 0, 0, view->ncols,
9096 	    view_needs_focus_indication(view),
9097 	    "tog help (press q to return to tog)");
9098 	if (err)
9099 		return err;
9100 	if (eos <= 1)
9101 		return NULL;
9102 	waddstr(view->window, "\n\n");
9103 	eos -= 2;
9104 
9105 	s->eof = 0;
9106 	view->maxx = 0;
9107 	line = NULL;
9108 	while (eos > 0 && nprinted < eos) {
9109 		attr_t attr = 0;
9110 
9111 		linelen = getline(&line, &linesz, s->f);
9112 		if (linelen == -1) {
9113 			if (!feof(s->f)) {
9114 				free(line);
9115 				return got_ferror(s->f, GOT_ERR_IO);
9116 			}
9117 			s->eof = 1;
9118 			break;
9119 		}
9120 		if (++s->lineno < s->first_displayed_line)
9121 			continue;
9122 		if (view->gline && !gotoline(view, &s->lineno, &nprinted))
9123 			continue;
9124 		if (s->lineno == view->hiline)
9125 			attr = A_STANDOUT;
9126 
9127 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
9128 		    view->x ? 1 : 0);
9129 		if (err) {
9130 			free(line);
9131 			return err;
9132 		}
9133 		view->maxx = MAX(view->maxx, width);
9134 		free(wline);
9135 		wline = NULL;
9136 
9137 		if (attr)
9138 			wattron(view->window, attr);
9139 		if (s->first_displayed_line + nprinted == s->matched_line &&
9140 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
9141 			err = add_matched_line(&width, line, view->ncols - 1, 0,
9142 			    view->window, view->x, regmatch);
9143 			if (err) {
9144 				free(line);
9145 				return err;
9146 			}
9147 		} else {
9148 			int skip;
9149 
9150 			err = format_line(&wline, &width, &skip, line,
9151 			    view->x, view->ncols, 0, view->x ? 1 : 0);
9152 			if (err) {
9153 				free(line);
9154 				return err;
9155 			}
9156 			waddwstr(view->window, &wline[skip]);
9157 			free(wline);
9158 			wline = NULL;
9159 		}
9160 		if (s->lineno == view->hiline) {
9161 			while (width++ < view->ncols)
9162 				waddch(view->window, ' ');
9163 		} else {
9164 			if (width < view->ncols)
9165 				waddch(view->window, '\n');
9166 		}
9167 		if (attr)
9168 			wattroff(view->window, attr);
9169 		if (++nprinted == 1)
9170 			s->first_displayed_line = s->lineno;
9171 	}
9172 	free(line);
9173 	if (nprinted > 0)
9174 		s->last_displayed_line = s->first_displayed_line + nprinted - 1;
9175 	else
9176 		s->last_displayed_line = s->first_displayed_line;
9177 
9178 	view_border(view);
9179 
9180 	if (s->eof) {
9181 		rc = waddnstr(view->window,
9182 		    "See the tog(1) manual page for full documentation",
9183 		    view->ncols - 1);
9184 		if (rc == ERR)
9185 			return got_error_msg(GOT_ERR_RANGE, "waddnstr");
9186 	} else {
9187 		wmove(view->window, view->nlines - 1, 0);
9188 		wclrtoeol(view->window);
9189 		wstandout(view->window);
9190 		rc = waddnstr(view->window, "scroll down for more...",
9191 		    view->ncols - 1);
9192 		if (rc == ERR)
9193 			return got_error_msg(GOT_ERR_RANGE, "waddnstr");
9194 		if (getcurx(view->window) < view->ncols - 6) {
9195 			rc = wprintw(view->window, "[%.0f%%]",
9196 			    100.00 * s->last_displayed_line / s->nlines);
9197 			if (rc == ERR)
9198 				return got_error_msg(GOT_ERR_IO, "wprintw");
9199 		}
9200 		wstandend(view->window);
9201 	}
9202 
9203 	return NULL;
9204 }
9205 
9206 static const struct got_error *
9207 input_help_view(struct tog_view **new_view, struct tog_view *view, int ch)
9208 {
9209 	struct tog_help_view_state	*s = &view->state.help;
9210 	const struct got_error		*err = NULL;
9211 	char				*line = NULL;
9212 	ssize_t				 linelen;
9213 	size_t				 linesz = 0;
9214 	int				 eos, nscroll;
9215 
9216 	eos = nscroll = view->nlines;
9217 	if (view_is_hsplit_top(view))
9218 		--eos;  /* border */
9219 
9220 	s->lineno = s->first_displayed_line - 1 + s->selected_line;
9221 
9222 	switch (ch) {
9223 	case '0':
9224 	case '$':
9225 	case KEY_RIGHT:
9226 	case 'l':
9227 	case KEY_LEFT:
9228 	case 'h':
9229 		horizontal_scroll_input(view, ch);
9230 		break;
9231 	case 'g':
9232 	case KEY_HOME:
9233 		s->first_displayed_line = 1;
9234 		view->count = 0;
9235 		break;
9236 	case 'G':
9237 	case KEY_END:
9238 		view->count = 0;
9239 		if (s->eof)
9240 			break;
9241 		s->first_displayed_line = (s->nlines - eos) + 3;
9242 		s->eof = 1;
9243 		break;
9244 	case 'k':
9245 	case KEY_UP:
9246 		if (s->first_displayed_line > 1)
9247 			--s->first_displayed_line;
9248 		else
9249 			view->count = 0;
9250 		break;
9251 	case CTRL('u'):
9252 	case 'u':
9253 		nscroll /= 2;
9254 		/* FALL THROUGH */
9255 	case KEY_PPAGE:
9256 	case CTRL('b'):
9257 	case 'b':
9258 		if (s->first_displayed_line == 1) {
9259 			view->count = 0;
9260 			break;
9261 		}
9262 		while (--nscroll > 0 && s->first_displayed_line > 1)
9263 			s->first_displayed_line--;
9264 		break;
9265 	case 'j':
9266 	case KEY_DOWN:
9267 	case CTRL('n'):
9268 		if (!s->eof)
9269 			++s->first_displayed_line;
9270 		else
9271 			view->count = 0;
9272 		break;
9273 	case CTRL('d'):
9274 	case 'd':
9275 		nscroll /= 2;
9276 		/* FALL THROUGH */
9277 	case KEY_NPAGE:
9278 	case CTRL('f'):
9279 	case 'f':
9280 	case ' ':
9281 		if (s->eof) {
9282 			view->count = 0;
9283 			break;
9284 		}
9285 		while (!s->eof && --nscroll > 0) {
9286 			linelen = getline(&line, &linesz, s->f);
9287 			s->first_displayed_line++;
9288 			if (linelen == -1) {
9289 				if (feof(s->f))
9290 					s->eof = 1;
9291 				else
9292 					err = got_ferror(s->f, GOT_ERR_IO);
9293 				break;
9294 			}
9295 		}
9296 		free(line);
9297 		break;
9298 	default:
9299 		view->count = 0;
9300 		break;
9301 	}
9302 
9303 	return err;
9304 }
9305 
9306 static const struct got_error *
9307 close_help_view(struct tog_view *view)
9308 {
9309 	struct tog_help_view_state *s = &view->state.help;
9310 
9311 	free(s->line_offsets);
9312 	s->line_offsets = NULL;
9313 	if (fclose(s->f) == EOF)
9314 		return got_error_from_errno("fclose");
9315 
9316 	return NULL;
9317 }
9318 
9319 static const struct got_error *
9320 reset_help_view(struct tog_view *view)
9321 {
9322 	struct tog_help_view_state *s = &view->state.help;
9323 
9324 
9325 	if (s->f && fclose(s->f) == EOF)
9326 		return got_error_from_errno("fclose");
9327 
9328 	wclear(view->window);
9329 	view->count = 0;
9330 	view->x = 0;
9331 	s->all = !s->all;
9332 	s->first_displayed_line = 1;
9333 	s->last_displayed_line = view->nlines;
9334 	s->matched_line = 0;
9335 
9336 	return create_help(s);
9337 }
9338 
9339 static const struct got_error *
9340 open_help_view(struct tog_view *view, struct tog_view *parent)
9341 {
9342 	const struct got_error		*err = NULL;
9343 	struct tog_help_view_state	*s = &view->state.help;
9344 
9345 	s->type = (enum tog_keymap_type)parent->type;
9346 	s->first_displayed_line = 1;
9347 	s->last_displayed_line = view->nlines;
9348 	s->selected_line = 1;
9349 
9350 	view->show = show_help_view;
9351 	view->input = input_help_view;
9352 	view->reset = reset_help_view;
9353 	view->close = close_help_view;
9354 	view->search_start = search_start_help_view;
9355 	view->search_setup = search_setup_help_view;
9356 	view->search_next = search_next_view_match;
9357 
9358 	err = create_help(s);
9359 	return err;
9360 }
9361 
9362 static const struct got_error *
9363 view_dispatch_request(struct tog_view **new_view, struct tog_view *view,
9364     enum tog_view_type request, int y, int x)
9365 {
9366 	const struct got_error *err = NULL;
9367 
9368 	*new_view = NULL;
9369 
9370 	switch (request) {
9371 	case TOG_VIEW_DIFF:
9372 		if (view->type == TOG_VIEW_LOG) {
9373 			struct tog_log_view_state *s = &view->state.log;
9374 
9375 			err = open_diff_view_for_commit(new_view, y, x,
9376 			    s->selected_entry->commit, s->selected_entry->id,
9377 			    view, s->repo);
9378 		} else
9379 			return got_error_msg(GOT_ERR_NOT_IMPL,
9380 			    "parent/child view pair not supported");
9381 		break;
9382 	case TOG_VIEW_BLAME:
9383 		if (view->type == TOG_VIEW_TREE) {
9384 			struct tog_tree_view_state *s = &view->state.tree;
9385 
9386 			err = blame_tree_entry(new_view, y, x,
9387 			    s->selected_entry, &s->parents, s->commit_id,
9388 			    s->repo);
9389 		} else
9390 			return got_error_msg(GOT_ERR_NOT_IMPL,
9391 			    "parent/child view pair not supported");
9392 		break;
9393 	case TOG_VIEW_LOG:
9394 		if (view->type == TOG_VIEW_BLAME)
9395 			err = log_annotated_line(new_view, y, x,
9396 			    view->state.blame.repo, view->state.blame.id_to_log);
9397 		else if (view->type == TOG_VIEW_TREE)
9398 			err = log_selected_tree_entry(new_view, y, x,
9399 			    &view->state.tree);
9400 		else if (view->type == TOG_VIEW_REF)
9401 			err = log_ref_entry(new_view, y, x,
9402 			    view->state.ref.selected_entry,
9403 			    view->state.ref.repo);
9404 		else
9405 			return got_error_msg(GOT_ERR_NOT_IMPL,
9406 			    "parent/child view pair not supported");
9407 		break;
9408 	case TOG_VIEW_TREE:
9409 		if (view->type == TOG_VIEW_LOG)
9410 			err = browse_commit_tree(new_view, y, x,
9411 			    view->state.log.selected_entry,
9412 			    view->state.log.in_repo_path,
9413 			    view->state.log.head_ref_name,
9414 			    view->state.log.repo);
9415 		else if (view->type == TOG_VIEW_REF)
9416 			err = browse_ref_tree(new_view, y, x,
9417 			    view->state.ref.selected_entry,
9418 			    view->state.ref.repo);
9419 		else
9420 			return got_error_msg(GOT_ERR_NOT_IMPL,
9421 			    "parent/child view pair not supported");
9422 		break;
9423 	case TOG_VIEW_REF:
9424 		*new_view = view_open(0, 0, y, x, TOG_VIEW_REF);
9425 		if (*new_view == NULL)
9426 			return got_error_from_errno("view_open");
9427 		if (view->type == TOG_VIEW_LOG)
9428 			err = open_ref_view(*new_view, view->state.log.repo);
9429 		else if (view->type == TOG_VIEW_TREE)
9430 			err = open_ref_view(*new_view, view->state.tree.repo);
9431 		else
9432 			err = got_error_msg(GOT_ERR_NOT_IMPL,
9433 			    "parent/child view pair not supported");
9434 		if (err)
9435 			view_close(*new_view);
9436 		break;
9437 	case TOG_VIEW_HELP:
9438 		*new_view = view_open(0, 0, 0, 0, TOG_VIEW_HELP);
9439 		if (*new_view == NULL)
9440 			return got_error_from_errno("view_open");
9441 		err = open_help_view(*new_view, view);
9442 		if (err)
9443 			view_close(*new_view);
9444 		break;
9445 	default:
9446 		return got_error_msg(GOT_ERR_NOT_IMPL, "invalid view");
9447 	}
9448 
9449 	return err;
9450 }
9451 
9452 /*
9453  * If view was scrolled down to move the selected line into view when opening a
9454  * horizontal split, scroll back up when closing the split/toggling fullscreen.
9455  */
9456 static void
9457 offset_selection_up(struct tog_view *view)
9458 {
9459 	switch (view->type) {
9460 	case TOG_VIEW_BLAME: {
9461 		struct tog_blame_view_state *s = &view->state.blame;
9462 		if (s->first_displayed_line == 1) {
9463 			s->selected_line = MAX(s->selected_line - view->offset,
9464 			    1);
9465 			break;
9466 		}
9467 		if (s->first_displayed_line > view->offset)
9468 			s->first_displayed_line -= view->offset;
9469 		else
9470 			s->first_displayed_line = 1;
9471 		s->selected_line += view->offset;
9472 		break;
9473 	}
9474 	case TOG_VIEW_LOG:
9475 		log_scroll_up(&view->state.log, view->offset);
9476 		view->state.log.selected += view->offset;
9477 		break;
9478 	case TOG_VIEW_REF:
9479 		ref_scroll_up(&view->state.ref, view->offset);
9480 		view->state.ref.selected += view->offset;
9481 		break;
9482 	case TOG_VIEW_TREE:
9483 		tree_scroll_up(&view->state.tree, view->offset);
9484 		view->state.tree.selected += view->offset;
9485 		break;
9486 	default:
9487 		break;
9488 	}
9489 
9490 	view->offset = 0;
9491 }
9492 
9493 /*
9494  * If the selected line is in the section of screen covered by the bottom split,
9495  * scroll down offset lines to move it into view and index its new position.
9496  */
9497 static const struct got_error *
9498 offset_selection_down(struct tog_view *view)
9499 {
9500 	const struct got_error	*err = NULL;
9501 	const struct got_error	*(*scrolld)(struct tog_view *, int);
9502 	int			*selected = NULL;
9503 	int			 header, offset;
9504 
9505 	switch (view->type) {
9506 	case TOG_VIEW_BLAME: {
9507 		struct tog_blame_view_state *s = &view->state.blame;
9508 		header = 3;
9509 		scrolld = NULL;
9510 		if (s->selected_line > view->nlines - header) {
9511 			offset = abs(view->nlines - s->selected_line - header);
9512 			s->first_displayed_line += offset;
9513 			s->selected_line -= offset;
9514 			view->offset = offset;
9515 		}
9516 		break;
9517 	}
9518 	case TOG_VIEW_LOG: {
9519 		struct tog_log_view_state *s = &view->state.log;
9520 		scrolld = &log_scroll_down;
9521 		header = view_is_parent_view(view) ? 3 : 2;
9522 		selected = &s->selected;
9523 		break;
9524 	}
9525 	case TOG_VIEW_REF: {
9526 		struct tog_ref_view_state *s = &view->state.ref;
9527 		scrolld = &ref_scroll_down;
9528 		header = 3;
9529 		selected = &s->selected;
9530 		break;
9531 	}
9532 	case TOG_VIEW_TREE: {
9533 		struct tog_tree_view_state *s = &view->state.tree;
9534 		scrolld = &tree_scroll_down;
9535 		header = 5;
9536 		selected = &s->selected;
9537 		break;
9538 	}
9539 	default:
9540 		selected = NULL;
9541 		scrolld = NULL;
9542 		header = 0;
9543 		break;
9544 	}
9545 
9546 	if (selected && *selected > view->nlines - header) {
9547 		offset = abs(view->nlines - *selected - header);
9548 		view->offset = offset;
9549 		if (scrolld && offset) {
9550 			err = scrolld(view, offset);
9551 			*selected -= offset;
9552 		}
9553 	}
9554 
9555 	return err;
9556 }
9557 
9558 static void
9559 list_commands(FILE *fp)
9560 {
9561 	size_t i;
9562 
9563 	fprintf(fp, "commands:");
9564 	for (i = 0; i < nitems(tog_commands); i++) {
9565 		const struct tog_cmd *cmd = &tog_commands[i];
9566 		fprintf(fp, " %s", cmd->name);
9567 	}
9568 	fputc('\n', fp);
9569 }
9570 
9571 __dead static void
9572 usage(int hflag, int status)
9573 {
9574 	FILE *fp = (status == 0) ? stdout : stderr;
9575 
9576 	fprintf(fp, "usage: %s [-hV] command [arg ...]\n",
9577 	    getprogname());
9578 	if (hflag) {
9579 		fprintf(fp, "lazy usage: %s path\n", getprogname());
9580 		list_commands(fp);
9581 	}
9582 	exit(status);
9583 }
9584 
9585 static char **
9586 make_argv(int argc, ...)
9587 {
9588 	va_list ap;
9589 	char **argv;
9590 	int i;
9591 
9592 	va_start(ap, argc);
9593 
9594 	argv = calloc(argc, sizeof(char *));
9595 	if (argv == NULL)
9596 		err(1, "calloc");
9597 	for (i = 0; i < argc; i++) {
9598 		argv[i] = strdup(va_arg(ap, char *));
9599 		if (argv[i] == NULL)
9600 			err(1, "strdup");
9601 	}
9602 
9603 	va_end(ap);
9604 	return argv;
9605 }
9606 
9607 /*
9608  * Try to convert 'tog path' into a 'tog log path' command.
9609  * The user could simply have mistyped the command rather than knowingly
9610  * provided a path. So check whether argv[0] can in fact be resolved
9611  * to a path in the HEAD commit and print a special error if not.
9612  * This hack is for mpi@ <3
9613  */
9614 static const struct got_error *
9615 tog_log_with_path(int argc, char *argv[])
9616 {
9617 	const struct got_error *error = NULL, *close_err;
9618 	const struct tog_cmd *cmd = NULL;
9619 	struct got_repository *repo = NULL;
9620 	struct got_worktree *worktree = NULL;
9621 	struct got_object_id *commit_id = NULL, *id = NULL;
9622 	struct got_commit_object *commit = NULL;
9623 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
9624 	char *commit_id_str = NULL, **cmd_argv = NULL;
9625 	int *pack_fds = NULL;
9626 
9627 	cwd = getcwd(NULL, 0);
9628 	if (cwd == NULL)
9629 		return got_error_from_errno("getcwd");
9630 
9631 	error = got_repo_pack_fds_open(&pack_fds);
9632 	if (error != NULL)
9633 		goto done;
9634 
9635 	error = got_worktree_open(&worktree, cwd);
9636 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
9637 		goto done;
9638 
9639 	if (worktree)
9640 		repo_path = strdup(got_worktree_get_repo_path(worktree));
9641 	else
9642 		repo_path = strdup(cwd);
9643 	if (repo_path == NULL) {
9644 		error = got_error_from_errno("strdup");
9645 		goto done;
9646 	}
9647 
9648 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
9649 	if (error != NULL)
9650 		goto done;
9651 
9652 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
9653 	    repo, worktree);
9654 	if (error)
9655 		goto done;
9656 
9657 	error = tog_load_refs(repo, 0);
9658 	if (error)
9659 		goto done;
9660 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
9661 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
9662 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
9663 	if (error)
9664 		goto done;
9665 
9666 	if (worktree) {
9667 		got_worktree_close(worktree);
9668 		worktree = NULL;
9669 	}
9670 
9671 	error = got_object_open_as_commit(&commit, repo, commit_id);
9672 	if (error)
9673 		goto done;
9674 
9675 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
9676 	if (error) {
9677 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
9678 			goto done;
9679 		fprintf(stderr, "%s: '%s' is no known command or path\n",
9680 		    getprogname(), argv[0]);
9681 		usage(1, 1);
9682 		/* not reached */
9683 	}
9684 
9685 	error = got_object_id_str(&commit_id_str, commit_id);
9686 	if (error)
9687 		goto done;
9688 
9689 	cmd = &tog_commands[0]; /* log */
9690 	argc = 4;
9691 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
9692 	error = cmd->cmd_main(argc, cmd_argv);
9693 done:
9694 	if (repo) {
9695 		close_err = got_repo_close(repo);
9696 		if (error == NULL)
9697 			error = close_err;
9698 	}
9699 	if (commit)
9700 		got_object_commit_close(commit);
9701 	if (worktree)
9702 		got_worktree_close(worktree);
9703 	if (pack_fds) {
9704 		const struct got_error *pack_err =
9705 		    got_repo_pack_fds_close(pack_fds);
9706 		if (error == NULL)
9707 			error = pack_err;
9708 	}
9709 	free(id);
9710 	free(commit_id_str);
9711 	free(commit_id);
9712 	free(cwd);
9713 	free(repo_path);
9714 	free(in_repo_path);
9715 	if (cmd_argv) {
9716 		int i;
9717 		for (i = 0; i < argc; i++)
9718 			free(cmd_argv[i]);
9719 		free(cmd_argv);
9720 	}
9721 	tog_free_refs();
9722 	return error;
9723 }
9724 
9725 int
9726 main(int argc, char *argv[])
9727 {
9728 	const struct got_error *io_err, *error = NULL;
9729 	const struct tog_cmd *cmd = NULL;
9730 	int ch, hflag = 0, Vflag = 0;
9731 	char **cmd_argv = NULL;
9732 	static const struct option longopts[] = {
9733 	    { "version", no_argument, NULL, 'V' },
9734 	    { NULL, 0, NULL, 0}
9735 	};
9736 	char *diff_algo_str = NULL;
9737 	const char *test_script_path;
9738 
9739 	setlocale(LC_CTYPE, "");
9740 
9741 	/*
9742 	 * Test mode init must happen before pledge() because "tty" will
9743 	 * not allow TTY-related ioctls to occur via regular files.
9744 	 */
9745 	test_script_path = getenv("GOT_TOG_TEST");
9746 	if (test_script_path != NULL) {
9747 		error = init_mock_term(test_script_path);
9748 		if (error) {
9749 			fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
9750 			return 1;
9751 		}
9752 	}
9753 
9754 #if !defined(PROFILE)
9755 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
9756 	    NULL) == -1)
9757 		err(1, "pledge");
9758 #endif
9759 
9760 	if (!isatty(STDIN_FILENO))
9761 		errx(1, "standard input is not a tty");
9762 
9763 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
9764 		switch (ch) {
9765 		case 'h':
9766 			hflag = 1;
9767 			break;
9768 		case 'V':
9769 			Vflag = 1;
9770 			break;
9771 		default:
9772 			usage(hflag, 1);
9773 			/* NOTREACHED */
9774 		}
9775 	}
9776 
9777 	argc -= optind;
9778 	argv += optind;
9779 	optind = 1;
9780 	optreset = 1;
9781 
9782 	if (Vflag) {
9783 		got_version_print_str();
9784 		return 0;
9785 	}
9786 
9787 	if (argc == 0) {
9788 		if (hflag)
9789 			usage(hflag, 0);
9790 		/* Build an argument vector which runs a default command. */
9791 		cmd = &tog_commands[0];
9792 		argc = 1;
9793 		cmd_argv = make_argv(argc, cmd->name);
9794 	} else {
9795 		size_t i;
9796 
9797 		/* Did the user specify a command? */
9798 		for (i = 0; i < nitems(tog_commands); i++) {
9799 			if (strncmp(tog_commands[i].name, argv[0],
9800 			    strlen(argv[0])) == 0) {
9801 				cmd = &tog_commands[i];
9802 				break;
9803 			}
9804 		}
9805 	}
9806 
9807 	diff_algo_str = getenv("TOG_DIFF_ALGORITHM");
9808 	if (diff_algo_str) {
9809 		if (strcasecmp(diff_algo_str, "patience") == 0)
9810 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
9811 		if (strcasecmp(diff_algo_str, "myers") == 0)
9812 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
9813 	}
9814 
9815 	if (cmd == NULL) {
9816 		if (argc != 1)
9817 			usage(0, 1);
9818 		/* No command specified; try log with a path */
9819 		error = tog_log_with_path(argc, argv);
9820 	} else {
9821 		if (hflag)
9822 			cmd->cmd_usage();
9823 		else
9824 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
9825 	}
9826 
9827 	if (using_mock_io) {
9828 		io_err = tog_io_close();
9829 		if (error == NULL)
9830 			error = io_err;
9831 	}
9832 	endwin();
9833 	if (cmd_argv) {
9834 		int i;
9835 		for (i = 0; i < argc; i++)
9836 			free(cmd_argv[i]);
9837 		free(cmd_argv);
9838 	}
9839 
9840 	if (error && error->code != GOT_ERR_CANCELLED &&
9841 	    error->code != GOT_ERR_EOF &&
9842 	    error->code != GOT_ERR_PRIVSEP_EXIT &&
9843 	    error->code != GOT_ERR_PRIVSEP_PIPE &&
9844 	    !(error->code == GOT_ERR_ERRNO && errno == EINTR))
9845 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
9846 	return 0;
9847 }