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 <sys/queue.h>
18 #include <sys/stat.h>
19 #include <sys/ioctl.h>
20 
21 #include <ctype.h>
22 #include <errno.h>
23 #if defined(__FreeBSD__) || defined(__APPLE__)
24 #define _XOPEN_SOURCE_EXTENDED /* for ncurses wide-character functions */
25 #endif
26 #include <curses.h>
27 #include <panel.h>
28 #include <locale.h>
29 #include <signal.h>
30 #include <stdlib.h>
31 #include <stdarg.h>
32 #include <stdio.h>
33 #include <getopt.h>
34 #include <string.h>
35 #include <err.h>
36 #include <unistd.h>
37 #include <limits.h>
38 #include <wchar.h>
39 #include <time.h>
40 #include <pthread.h>
41 #include <libgen.h>
42 #include <regex.h>
43 #include <sched.h>
44 
45 #include "got_compat.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 };
112 
113 enum tog_view_mode {
114 	TOG_VIEW_SPLIT_NONE,
115 	TOG_VIEW_SPLIT_VERT,
116 	TOG_VIEW_SPLIT_HRZN
117 };
118 
119 #define HSPLIT_SCALE	0.3  /* default horizontal split scale */
120 
121 #define TOG_EOF_STRING	"(END)"
122 
123 struct commit_queue_entry {
124 	TAILQ_ENTRY(commit_queue_entry) entry;
125 	struct got_object_id *id;
126 	struct got_commit_object *commit;
127 	int idx;
128 };
129 TAILQ_HEAD(commit_queue_head, commit_queue_entry);
130 struct commit_queue {
131 	int ncommits;
132 	struct commit_queue_head head;
133 };
134 
135 struct tog_color {
136 	STAILQ_ENTRY(tog_color) entry;
137 	regex_t regex;
138 	short colorpair;
139 };
140 STAILQ_HEAD(tog_colors, tog_color);
141 
142 static struct got_reflist_head tog_refs = TAILQ_HEAD_INITIALIZER(tog_refs);
143 static struct got_reflist_object_id_map *tog_refs_idmap;
144 static enum got_diff_algorithm tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
145 
146 static const struct got_error *
147 tog_ref_cmp_by_name(void *arg, int *cmp, struct got_reference *re1,
148     struct got_reference* re2)
149 {
150 	const char *name1 = got_ref_get_name(re1);
151 	const char *name2 = got_ref_get_name(re2);
152 	int isbackup1, isbackup2;
153 
154 	/* Sort backup refs towards the bottom of the list. */
155 	isbackup1 = strncmp(name1, "refs/got/backup/", 16) == 0;
156 	isbackup2 = strncmp(name2, "refs/got/backup/", 16) == 0;
157 	if (!isbackup1 && isbackup2) {
158 		*cmp = -1;
159 		return NULL;
160 	} else if (isbackup1 && !isbackup2) {
161 		*cmp = 1;
162 		return NULL;
163 	}
164 
165 	*cmp = got_path_cmp(name1, name2, strlen(name1), strlen(name2));
166 	return NULL;
167 }
168 
169 static const struct got_error *
170 tog_load_refs(struct got_repository *repo, int sort_by_date)
171 {
172 	const struct got_error *err;
173 
174 	err = got_ref_list(&tog_refs, repo, NULL, sort_by_date ?
175 	    got_ref_cmp_by_commit_timestamp_descending : tog_ref_cmp_by_name,
176 	    repo);
177 	if (err)
178 		return err;
179 
180 	return got_reflist_object_id_map_create(&tog_refs_idmap, &tog_refs,
181 	    repo);
182 }
183 
184 static void
185 tog_free_refs(void)
186 {
187 	if (tog_refs_idmap) {
188 		got_reflist_object_id_map_free(tog_refs_idmap);
189 		tog_refs_idmap = NULL;
190 	}
191 	got_ref_list_free(&tog_refs);
192 }
193 
194 static const struct got_error *
195 add_color(struct tog_colors *colors, const char *pattern,
196     int idx, short color)
197 {
198 	const struct got_error *err = NULL;
199 	struct tog_color *tc;
200 	int regerr = 0;
201 
202 	if (idx < 1 || idx > COLOR_PAIRS - 1)
203 		return NULL;
204 
205 	init_pair(idx, color, -1);
206 
207 	tc = calloc(1, sizeof(*tc));
208 	if (tc == NULL)
209 		return got_error_from_errno("calloc");
210 	regerr = regcomp(&tc->regex, pattern,
211 	    REG_EXTENDED | REG_NOSUB | REG_NEWLINE);
212 	if (regerr) {
213 		static char regerr_msg[512];
214 		static char err_msg[512];
215 		regerror(regerr, &tc->regex, regerr_msg,
216 		    sizeof(regerr_msg));
217 		snprintf(err_msg, sizeof(err_msg), "regcomp: %s",
218 		    regerr_msg);
219 		err = got_error_msg(GOT_ERR_REGEX, err_msg);
220 		free(tc);
221 		return err;
222 	}
223 	tc->colorpair = idx;
224 	STAILQ_INSERT_HEAD(colors, tc, entry);
225 	return NULL;
226 }
227 
228 static void
229 free_colors(struct tog_colors *colors)
230 {
231 	struct tog_color *tc;
232 
233 	while (!STAILQ_EMPTY(colors)) {
234 		tc = STAILQ_FIRST(colors);
235 		STAILQ_REMOVE_HEAD(colors, entry);
236 		regfree(&tc->regex);
237 		free(tc);
238 	}
239 }
240 
241 static struct tog_color *
242 get_color(struct tog_colors *colors, int colorpair)
243 {
244 	struct tog_color *tc = NULL;
245 
246 	STAILQ_FOREACH(tc, colors, entry) {
247 		if (tc->colorpair == colorpair)
248 			return tc;
249 	}
250 
251 	return NULL;
252 }
253 
254 static int
255 default_color_value(const char *envvar)
256 {
257 	if (strcmp(envvar, "TOG_COLOR_DIFF_MINUS") == 0)
258 		return COLOR_MAGENTA;
259 	if (strcmp(envvar, "TOG_COLOR_DIFF_PLUS") == 0)
260 		return COLOR_CYAN;
261 	if (strcmp(envvar, "TOG_COLOR_DIFF_CHUNK_HEADER") == 0)
262 		return COLOR_YELLOW;
263 	if (strcmp(envvar, "TOG_COLOR_DIFF_META") == 0)
264 		return COLOR_GREEN;
265 	if (strcmp(envvar, "TOG_COLOR_TREE_SUBMODULE") == 0)
266 		return COLOR_MAGENTA;
267 	if (strcmp(envvar, "TOG_COLOR_TREE_SYMLINK") == 0)
268 		return COLOR_MAGENTA;
269 	if (strcmp(envvar, "TOG_COLOR_TREE_DIRECTORY") == 0)
270 		return COLOR_CYAN;
271 	if (strcmp(envvar, "TOG_COLOR_TREE_EXECUTABLE") == 0)
272 		return COLOR_GREEN;
273 	if (strcmp(envvar, "TOG_COLOR_COMMIT") == 0)
274 		return COLOR_GREEN;
275 	if (strcmp(envvar, "TOG_COLOR_AUTHOR") == 0)
276 		return COLOR_CYAN;
277 	if (strcmp(envvar, "TOG_COLOR_DATE") == 0)
278 		return COLOR_YELLOW;
279 	if (strcmp(envvar, "TOG_COLOR_REFS_HEADS") == 0)
280 		return COLOR_GREEN;
281 	if (strcmp(envvar, "TOG_COLOR_REFS_TAGS") == 0)
282 		return COLOR_MAGENTA;
283 	if (strcmp(envvar, "TOG_COLOR_REFS_REMOTES") == 0)
284 		return COLOR_YELLOW;
285 	if (strcmp(envvar, "TOG_COLOR_REFS_BACKUP") == 0)
286 		return COLOR_CYAN;
287 
288 	return -1;
289 }
290 
291 static int
292 get_color_value(const char *envvar)
293 {
294 	const char *val = getenv(envvar);
295 
296 	if (val == NULL)
297 		return default_color_value(envvar);
298 
299 	if (strcasecmp(val, "black") == 0)
300 		return COLOR_BLACK;
301 	if (strcasecmp(val, "red") == 0)
302 		return COLOR_RED;
303 	if (strcasecmp(val, "green") == 0)
304 		return COLOR_GREEN;
305 	if (strcasecmp(val, "yellow") == 0)
306 		return COLOR_YELLOW;
307 	if (strcasecmp(val, "blue") == 0)
308 		return COLOR_BLUE;
309 	if (strcasecmp(val, "magenta") == 0)
310 		return COLOR_MAGENTA;
311 	if (strcasecmp(val, "cyan") == 0)
312 		return COLOR_CYAN;
313 	if (strcasecmp(val, "white") == 0)
314 		return COLOR_WHITE;
315 	if (strcasecmp(val, "default") == 0)
316 		return -1;
317 
318 	return default_color_value(envvar);
319 }
320 
321 
322 struct tog_diff_view_state {
323 	struct got_object_id *id1, *id2;
324 	const char *label1, *label2;
325 	FILE *f, *f1, *f2;
326 	int fd1, fd2;
327 	int first_displayed_line;
328 	int last_displayed_line;
329 	int eof;
330 	int diff_context;
331 	int ignore_whitespace;
332 	int force_text_diff;
333 	struct got_repository *repo;
334 	struct tog_colors colors;
335 	size_t nlines;
336 	off_t *line_offsets;
337 	int matched_line;
338 	int selected_line;
339 
340 	/* passed from log or blame view; may be NULL */
341 	struct tog_view *parent_view;
342 };
343 
344 pthread_mutex_t tog_mutex = PTHREAD_MUTEX_INITIALIZER;
345 static volatile sig_atomic_t tog_thread_error;
346 
347 struct tog_log_thread_args {
348 	pthread_cond_t need_commits;
349 	pthread_cond_t commit_loaded;
350 	int commits_needed;
351 	int load_all;
352 	struct got_commit_graph *graph;
353 	struct commit_queue *commits;
354 	const char *in_repo_path;
355 	struct got_object_id *start_id;
356 	struct got_repository *repo;
357 	int *pack_fds;
358 	int log_complete;
359 	sig_atomic_t *quit;
360 	struct commit_queue_entry **first_displayed_entry;
361 	struct commit_queue_entry **selected_entry;
362 	int *searching;
363 	int *search_next_done;
364 	regex_t *regex;
365 };
366 
367 struct tog_log_view_state {
368 	struct commit_queue commits;
369 	struct commit_queue_entry *first_displayed_entry;
370 	struct commit_queue_entry *last_displayed_entry;
371 	struct commit_queue_entry *selected_entry;
372 	int selected;
373 	char *in_repo_path;
374 	char *head_ref_name;
375 	int log_branches;
376 	struct got_repository *repo;
377 	struct got_object_id *start_id;
378 	sig_atomic_t quit;
379 	pthread_t thread;
380 	struct tog_log_thread_args thread_args;
381 	struct commit_queue_entry *matched_entry;
382 	struct commit_queue_entry *search_entry;
383 	struct tog_colors colors;
384 	int use_committer;
385 };
386 
387 #define TOG_COLOR_DIFF_MINUS		1
388 #define TOG_COLOR_DIFF_PLUS		2
389 #define TOG_COLOR_DIFF_CHUNK_HEADER	3
390 #define TOG_COLOR_DIFF_META		4
391 #define TOG_COLOR_TREE_SUBMODULE	5
392 #define TOG_COLOR_TREE_SYMLINK		6
393 #define TOG_COLOR_TREE_DIRECTORY	7
394 #define TOG_COLOR_TREE_EXECUTABLE	8
395 #define TOG_COLOR_COMMIT		9
396 #define TOG_COLOR_AUTHOR		10
397 #define TOG_COLOR_DATE			11
398 #define TOG_COLOR_REFS_HEADS		12
399 #define TOG_COLOR_REFS_TAGS		13
400 #define TOG_COLOR_REFS_REMOTES		14
401 #define TOG_COLOR_REFS_BACKUP		15
402 
403 struct tog_blame_cb_args {
404 	struct tog_blame_line *lines; /* one per line */
405 	int nlines;
406 
407 	struct tog_view *view;
408 	struct got_object_id *commit_id;
409 	int *quit;
410 };
411 
412 struct tog_blame_thread_args {
413 	const char *path;
414 	struct got_repository *repo;
415 	struct tog_blame_cb_args *cb_args;
416 	int *complete;
417 	got_cancel_cb cancel_cb;
418 	void *cancel_arg;
419 };
420 
421 struct tog_blame {
422 	FILE *f;
423 	off_t filesize;
424 	struct tog_blame_line *lines;
425 	int nlines;
426 	off_t *line_offsets;
427 	pthread_t thread;
428 	struct tog_blame_thread_args thread_args;
429 	struct tog_blame_cb_args cb_args;
430 	const char *path;
431 	int *pack_fds;
432 };
433 
434 struct tog_blame_view_state {
435 	int first_displayed_line;
436 	int last_displayed_line;
437 	int selected_line;
438 	int last_diffed_line;
439 	int blame_complete;
440 	int eof;
441 	int done;
442 	struct got_object_id_queue blamed_commits;
443 	struct got_object_qid *blamed_commit;
444 	char *path;
445 	struct got_repository *repo;
446 	struct got_object_id *commit_id;
447 	struct tog_blame blame;
448 	int matched_line;
449 	struct tog_colors colors;
450 };
451 
452 struct tog_parent_tree {
453 	TAILQ_ENTRY(tog_parent_tree) entry;
454 	struct got_tree_object *tree;
455 	struct got_tree_entry *first_displayed_entry;
456 	struct got_tree_entry *selected_entry;
457 	int selected;
458 };
459 
460 TAILQ_HEAD(tog_parent_trees, tog_parent_tree);
461 
462 struct tog_tree_view_state {
463 	char *tree_label;
464 	struct got_object_id *commit_id;/* commit which this tree belongs to */
465 	struct got_tree_object *root;	/* the commit's root tree entry */
466 	struct got_tree_object *tree;	/* currently displayed (sub-)tree */
467 	struct got_tree_entry *first_displayed_entry;
468 	struct got_tree_entry *last_displayed_entry;
469 	struct got_tree_entry *selected_entry;
470 	int ndisplayed, selected, show_ids;
471 	struct tog_parent_trees parents; /* parent trees of current sub-tree */
472 	char *head_ref_name;
473 	struct got_repository *repo;
474 	struct got_tree_entry *matched_entry;
475 	struct tog_colors colors;
476 };
477 
478 struct tog_reflist_entry {
479 	TAILQ_ENTRY(tog_reflist_entry) entry;
480 	struct got_reference *ref;
481 	int idx;
482 };
483 
484 TAILQ_HEAD(tog_reflist_head, tog_reflist_entry);
485 
486 struct tog_ref_view_state {
487 	struct tog_reflist_head refs;
488 	struct tog_reflist_entry *first_displayed_entry;
489 	struct tog_reflist_entry *last_displayed_entry;
490 	struct tog_reflist_entry *selected_entry;
491 	int nrefs, ndisplayed, selected, show_date, show_ids, sort_by_date;
492 	struct got_repository *repo;
493 	struct tog_reflist_entry *matched_entry;
494 	struct tog_colors colors;
495 };
496 
497 /*
498  * We implement two types of views: parent views and child views.
499  *
500  * The 'Tab' key switches focus between a parent view and its child view.
501  * Child views are shown side-by-side to their parent view, provided
502  * there is enough screen estate.
503  *
504  * When a new view is opened from within a parent view, this new view
505  * becomes a child view of the parent view, replacing any existing child.
506  *
507  * When a new view is opened from within a child view, this new view
508  * becomes a parent view which will obscure the views below until the
509  * user quits the new parent view by typing 'q'.
510  *
511  * This list of views contains parent views only.
512  * Child views are only pointed to by their parent view.
513  */
514 TAILQ_HEAD(tog_view_list_head, tog_view);
515 
516 struct tog_view {
517 	TAILQ_ENTRY(tog_view) entry;
518 	WINDOW *window;
519 	PANEL *panel;
520 	int nlines, ncols, begin_y, begin_x; /* based on split height/width */
521 	int resized_y, resized_x; /* begin_y/x based on user resizing */
522 	int maxx, x; /* max column and current start column */
523 	int lines, cols; /* copies of LINES and COLS */
524 	int nscrolled, offset; /* lines scrolled and hsplit line offset */
525 	int ch, count; /* current keymap and count prefix */
526 	int resized; /* set when in a resize event */
527 	int focussed; /* Only set on one parent or child view at a time. */
528 	int dying;
529 	struct tog_view *parent;
530 	struct tog_view *child;
531 
532 	/*
533 	 * This flag is initially set on parent views when a new child view
534 	 * is created. It gets toggled when the 'Tab' key switches focus
535 	 * between parent and child.
536 	 * The flag indicates whether focus should be passed on to our child
537 	 * view if this parent view gets picked for focus after another parent
538 	 * view was closed. This prevents child views from losing focus in such
539 	 * situations.
540 	 */
541 	int focus_child;
542 
543 	enum tog_view_mode mode;
544 	/* type-specific state */
545 	enum tog_view_type type;
546 	union {
547 		struct tog_diff_view_state diff;
548 		struct tog_log_view_state log;
549 		struct tog_blame_view_state blame;
550 		struct tog_tree_view_state tree;
551 		struct tog_ref_view_state ref;
552 	} state;
553 
554 	const struct got_error *(*show)(struct tog_view *);
555 	const struct got_error *(*input)(struct tog_view **,
556 	    struct tog_view *, int);
557 	const struct got_error *(*reset)(struct tog_view *);
558 	const struct got_error *(*resize)(struct tog_view *, int);
559 	const struct got_error *(*close)(struct tog_view *);
560 
561 	const struct got_error *(*search_start)(struct tog_view *);
562 	const struct got_error *(*search_next)(struct tog_view *);
563 	int search_started;
564 	int searching;
565 #define TOG_SEARCH_FORWARD	1
566 #define TOG_SEARCH_BACKWARD	2
567 	int search_next_done;
568 #define TOG_SEARCH_HAVE_MORE	1
569 #define TOG_SEARCH_NO_MORE	2
570 #define TOG_SEARCH_HAVE_NONE	3
571 	regex_t regex;
572 	regmatch_t regmatch;
573 };
574 
575 static const struct got_error *open_diff_view(struct tog_view *,
576     struct got_object_id *, struct got_object_id *,
577     const char *, const char *, int, int, int, struct tog_view *,
578     struct got_repository *);
579 static const struct got_error *show_diff_view(struct tog_view *);
580 static const struct got_error *input_diff_view(struct tog_view **,
581     struct tog_view *, int);
582 static const struct got_error *reset_diff_view(struct tog_view *);
583 static const struct got_error* close_diff_view(struct tog_view *);
584 static const struct got_error *search_start_diff_view(struct tog_view *);
585 static const struct got_error *search_next_diff_view(struct tog_view *);
586 
587 static const struct got_error *open_log_view(struct tog_view *,
588     struct got_object_id *, struct got_repository *,
589     const char *, const char *, int);
590 static const struct got_error * show_log_view(struct tog_view *);
591 static const struct got_error *input_log_view(struct tog_view **,
592     struct tog_view *, int);
593 static const struct got_error *resize_log_view(struct tog_view *, int);
594 static const struct got_error *close_log_view(struct tog_view *);
595 static const struct got_error *search_start_log_view(struct tog_view *);
596 static const struct got_error *search_next_log_view(struct tog_view *);
597 
598 static const struct got_error *open_blame_view(struct tog_view *, char *,
599     struct got_object_id *, struct got_repository *);
600 static const struct got_error *show_blame_view(struct tog_view *);
601 static const struct got_error *input_blame_view(struct tog_view **,
602     struct tog_view *, int);
603 static const struct got_error *reset_blame_view(struct tog_view *);
604 static const struct got_error *close_blame_view(struct tog_view *);
605 static const struct got_error *search_start_blame_view(struct tog_view *);
606 static const struct got_error *search_next_blame_view(struct tog_view *);
607 
608 static const struct got_error *open_tree_view(struct tog_view *,
609     struct got_object_id *, const char *, struct got_repository *);
610 static const struct got_error *show_tree_view(struct tog_view *);
611 static const struct got_error *input_tree_view(struct tog_view **,
612     struct tog_view *, int);
613 static const struct got_error *close_tree_view(struct tog_view *);
614 static const struct got_error *search_start_tree_view(struct tog_view *);
615 static const struct got_error *search_next_tree_view(struct tog_view *);
616 
617 static const struct got_error *open_ref_view(struct tog_view *,
618     struct got_repository *);
619 static const struct got_error *show_ref_view(struct tog_view *);
620 static const struct got_error *input_ref_view(struct tog_view **,
621     struct tog_view *, int);
622 static const struct got_error *close_ref_view(struct tog_view *);
623 static const struct got_error *search_start_ref_view(struct tog_view *);
624 static const struct got_error *search_next_ref_view(struct tog_view *);
625 
626 static volatile sig_atomic_t tog_sigwinch_received;
627 static volatile sig_atomic_t tog_sigpipe_received;
628 static volatile sig_atomic_t tog_sigcont_received;
629 static volatile sig_atomic_t tog_sigint_received;
630 static volatile sig_atomic_t tog_sigterm_received;
631 
632 static void
633 tog_sigwinch(int signo)
634 {
635 	tog_sigwinch_received = 1;
636 }
637 
638 static void
639 tog_sigpipe(int signo)
640 {
641 	tog_sigpipe_received = 1;
642 }
643 
644 static void
645 tog_sigcont(int signo)
646 {
647 	tog_sigcont_received = 1;
648 }
649 
650 static void
651 tog_sigint(int signo)
652 {
653 	tog_sigint_received = 1;
654 }
655 
656 static void
657 tog_sigterm(int signo)
658 {
659 	tog_sigterm_received = 1;
660 }
661 
662 static int
663 tog_fatal_signal_received(void)
664 {
665 	return (tog_sigpipe_received ||
666 	    tog_sigint_received || tog_sigint_received);
667 }
668 
669 static const struct got_error *
670 view_close(struct tog_view *view)
671 {
672 	const struct got_error *err = NULL, *child_err = NULL;
673 
674 	if (view->child) {
675 		child_err = view_close(view->child);
676 		view->child = NULL;
677 	}
678 	if (view->close)
679 		err = view->close(view);
680 	if (view->panel)
681 		del_panel(view->panel);
682 	if (view->window)
683 		delwin(view->window);
684 	free(view);
685 	return err ? err : child_err;
686 }
687 
688 static struct tog_view *
689 view_open(int nlines, int ncols, int begin_y, int begin_x,
690     enum tog_view_type type)
691 {
692 	struct tog_view *view = calloc(1, sizeof(*view));
693 
694 	if (view == NULL)
695 		return NULL;
696 
697 	view->type = type;
698 	view->lines = LINES;
699 	view->cols = COLS;
700 	view->nlines = nlines ? nlines : LINES - begin_y;
701 	view->ncols = ncols ? ncols : COLS - begin_x;
702 	view->begin_y = begin_y;
703 	view->begin_x = begin_x;
704 	view->window = newwin(nlines, ncols, begin_y, begin_x);
705 	if (view->window == NULL) {
706 		view_close(view);
707 		return NULL;
708 	}
709 	view->panel = new_panel(view->window);
710 	if (view->panel == NULL ||
711 	    set_panel_userptr(view->panel, view) != OK) {
712 		view_close(view);
713 		return NULL;
714 	}
715 
716 	keypad(view->window, TRUE);
717 	return view;
718 }
719 
720 static int
721 view_split_begin_x(int begin_x)
722 {
723 	if (begin_x > 0 || COLS < 120)
724 		return 0;
725 	return (COLS - MAX(COLS / 2, 80));
726 }
727 
728 /* XXX Stub till we decide what to do. */
729 static int
730 view_split_begin_y(int lines)
731 {
732 	return lines * HSPLIT_SCALE;
733 }
734 
735 static const struct got_error *view_resize(struct tog_view *);
736 
737 static const struct got_error *
738 view_splitscreen(struct tog_view *view)
739 {
740 	const struct got_error *err = NULL;
741 
742 	if (!view->resized && view->mode == TOG_VIEW_SPLIT_HRZN) {
743 		if (view->resized_y && view->resized_y < view->lines)
744 			view->begin_y = view->resized_y;
745 		else
746 			view->begin_y = view_split_begin_y(view->nlines);
747 		view->begin_x = 0;
748 	} else if (!view->resized) {
749 		if (view->resized_x && view->resized_x < view->cols - 1 &&
750 		    view->cols > 119)
751 			view->begin_x = view->resized_x;
752 		else
753 			view->begin_x = view_split_begin_x(0);
754 		view->begin_y = 0;
755 	}
756 	view->nlines = LINES - view->begin_y;
757 	view->ncols = COLS - view->begin_x;
758 	view->lines = LINES;
759 	view->cols = COLS;
760 	err = view_resize(view);
761 	if (err)
762 		return err;
763 
764 	if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN)
765 		view->parent->nlines = view->begin_y;
766 
767 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
768 		return got_error_from_errno("mvwin");
769 
770 	return NULL;
771 }
772 
773 static const struct got_error *
774 view_fullscreen(struct tog_view *view)
775 {
776 	const struct got_error *err = NULL;
777 
778 	view->begin_x = 0;
779 	view->begin_y = view->resized ? view->begin_y : 0;
780 	view->nlines = view->resized ? view->nlines : LINES;
781 	view->ncols = COLS;
782 	view->lines = LINES;
783 	view->cols = COLS;
784 	err = view_resize(view);
785 	if (err)
786 		return err;
787 
788 	if (mvwin(view->window, view->begin_y, view->begin_x) == ERR)
789 		return got_error_from_errno("mvwin");
790 
791 	return NULL;
792 }
793 
794 static int
795 view_is_parent_view(struct tog_view *view)
796 {
797 	return view->parent == NULL;
798 }
799 
800 static int
801 view_is_splitscreen(struct tog_view *view)
802 {
803 	return view->begin_x > 0 || view->begin_y > 0;
804 }
805 
806 static int
807 view_is_fullscreen(struct tog_view *view)
808 {
809 	return view->nlines == LINES && view->ncols == COLS;
810 }
811 
812 static int
813 view_is_hsplit_top(struct tog_view *view)
814 {
815 	return view->mode == TOG_VIEW_SPLIT_HRZN && view->child &&
816 	    view_is_splitscreen(view->child);
817 }
818 
819 static void
820 view_border(struct tog_view *view)
821 {
822 	PANEL *panel;
823 	const struct tog_view *view_above;
824 
825 	if (view->parent)
826 		return view_border(view->parent);
827 
828 	panel = panel_above(view->panel);
829 	if (panel == NULL)
830 		return;
831 
832 	view_above = panel_userptr(panel);
833 	if (view->mode == TOG_VIEW_SPLIT_HRZN)
834 		mvwhline(view->window, view_above->begin_y - 1,
835 		    view->begin_x, got_locale_is_utf8() ?
836 		    ACS_HLINE : '-', view->ncols);
837 	else
838 		mvwvline(view->window, view->begin_y, view_above->begin_x - 1,
839 		    got_locale_is_utf8() ? ACS_VLINE : '|', view->nlines);
840 }
841 
842 static const struct got_error *view_init_hsplit(struct tog_view *, int);
843 static const struct got_error *request_log_commits(struct tog_view *);
844 static const struct got_error *offset_selection_down(struct tog_view *);
845 static void offset_selection_up(struct tog_view *);
846 static void view_get_split(struct tog_view *, int *, int *);
847 
848 static const struct got_error *
849 view_resize(struct tog_view *view)
850 {
851 	const struct got_error	*err = NULL;
852 	int			 dif, nlines, ncols;
853 
854 	dif = LINES - view->lines;  /* line difference */
855 
856 	if (view->lines > LINES)
857 		nlines = view->nlines - (view->lines - LINES);
858 	else
859 		nlines = view->nlines + (LINES - view->lines);
860 	if (view->cols > COLS)
861 		ncols = view->ncols - (view->cols - COLS);
862 	else
863 		ncols = view->ncols + (COLS - view->cols);
864 
865 	if (view->child) {
866 		int hs = view->child->begin_y;
867 
868 		if (!view_is_fullscreen(view))
869 			view->child->begin_x = view_split_begin_x(view->begin_x);
870 		if (view->mode == TOG_VIEW_SPLIT_HRZN ||
871 		    view->child->begin_x == 0) {
872 			ncols = COLS;
873 
874 			view_fullscreen(view->child);
875 			if (view->child->focussed)
876 				show_panel(view->child->panel);
877 			else
878 				show_panel(view->panel);
879 		} else {
880 			ncols = view->child->begin_x;
881 
882 			view_splitscreen(view->child);
883 			show_panel(view->child->panel);
884 		}
885 		/*
886 		 * XXX This is ugly and needs to be moved into the above
887 		 * logic but "works" for now and my attempts at moving it
888 		 * break either 'tab' or 'F' key maps in horizontal splits.
889 		 */
890 		if (hs) {
891 			err = view_splitscreen(view->child);
892 			if (err)
893 				return err;
894 			if (dif < 0) { /* top split decreased */
895 				err = offset_selection_down(view);
896 				if (err)
897 					return err;
898 			}
899 			view_border(view);
900 			update_panels();
901 			doupdate();
902 			show_panel(view->child->panel);
903 			nlines = view->nlines;
904 		}
905 	} else if (view->parent == NULL)
906 		ncols = COLS;
907 
908 	if (view->resize && dif > 0) {
909 		err = view->resize(view, dif);
910 		if (err)
911 			return err;
912 	}
913 
914 	if (wresize(view->window, nlines, ncols) == ERR)
915 		return got_error_from_errno("wresize");
916 	if (replace_panel(view->panel, view->window) == ERR)
917 		return got_error_from_errno("replace_panel");
918 	wclear(view->window);
919 
920 	view->nlines = nlines;
921 	view->ncols = ncols;
922 	view->lines = LINES;
923 	view->cols = COLS;
924 
925 	return NULL;
926 }
927 
928 static const struct got_error *
929 resize_log_view(struct tog_view *view, int increase)
930 {
931 	struct tog_log_view_state	*s = &view->state.log;
932 	const struct got_error		*err = NULL;
933 	int				 n = 0;
934 
935 	if (s->selected_entry)
936 		n = s->selected_entry->idx + view->lines - s->selected;
937 
938 	/*
939 	 * Request commits to account for the increased
940 	 * height so we have enough to populate the view.
941 	 */
942 	if (s->commits.ncommits < n) {
943 		view->nscrolled = n - s->commits.ncommits + increase + 1;
944 		err = request_log_commits(view);
945 	}
946 
947 	return err;
948 }
949 
950 static void
951 view_adjust_offset(struct tog_view *view, int n)
952 {
953 	if (n == 0)
954 		return;
955 
956 	if (view->parent && view->parent->offset) {
957 		if (view->parent->offset + n >= 0)
958 			view->parent->offset += n;
959 		else
960 			view->parent->offset = 0;
961 	} else if (view->offset) {
962 		if (view->offset - n >= 0)
963 			view->offset -= n;
964 		else
965 			view->offset = 0;
966 	}
967 }
968 
969 static const struct got_error *
970 view_resize_split(struct tog_view *view, int resize)
971 {
972 	const struct got_error	*err = NULL;
973 	struct tog_view		*v = NULL;
974 
975 	if (view->parent)
976 		v = view->parent;
977 	else
978 		v = view;
979 
980 	if (!v->child || !view_is_splitscreen(v->child))
981 		return NULL;
982 
983 	v->resized = v->child->resized = resize;  /* lock for resize event */
984 
985 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
986 		if (v->child->resized_y)
987 			v->child->begin_y = v->child->resized_y;
988 		if (view->parent)
989 			v->child->begin_y -= resize;
990 		else
991 			v->child->begin_y += resize;
992 		if (v->child->begin_y < 3) {
993 			view->count = 0;
994 			v->child->begin_y = 3;
995 		} else if (v->child->begin_y > LINES - 1) {
996 			view->count = 0;
997 			v->child->begin_y = LINES - 1;
998 		}
999 		v->ncols = COLS;
1000 		v->child->ncols = COLS;
1001 		view_adjust_offset(view, resize);
1002 		err = view_init_hsplit(v, v->child->begin_y);
1003 		if (err)
1004 			return err;
1005 		v->child->resized_y = v->child->begin_y;
1006 	} else {
1007 		if (v->child->resized_x)
1008 			v->child->begin_x = v->child->resized_x;
1009 		if (view->parent)
1010 			v->child->begin_x -= resize;
1011 		else
1012 			v->child->begin_x += resize;
1013 		if (v->child->begin_x < 11) {
1014 			view->count = 0;
1015 			v->child->begin_x = 11;
1016 		} else if (v->child->begin_x > COLS - 1) {
1017 			view->count = 0;
1018 			v->child->begin_x = COLS - 1;
1019 		}
1020 		v->child->resized_x = v->child->begin_x;
1021 	}
1022 
1023 	v->child->mode = v->mode;
1024 	v->child->nlines = v->lines - v->child->begin_y;
1025 	v->child->ncols = v->cols - v->child->begin_x;
1026 	v->focus_child = 1;
1027 
1028 	err = view_fullscreen(v);
1029 	if (err)
1030 		return err;
1031 	err = view_splitscreen(v->child);
1032 	if (err)
1033 		return err;
1034 
1035 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1036 		err = offset_selection_down(v->child);
1037 		if (err)
1038 			return err;
1039 	}
1040 
1041 	if (v->resize)
1042 		err = v->resize(v, 0);
1043 	else if (v->child->resize)
1044 		err = v->child->resize(v->child, 0);
1045 
1046 	v->resized = v->child->resized = 0;
1047 
1048 	return err;
1049 }
1050 
1051 static void
1052 view_transfer_size(struct tog_view *dst, struct tog_view *src)
1053 {
1054 	struct tog_view *v = src->child ? src->child : src;
1055 
1056 	dst->resized_x = v->resized_x;
1057 	dst->resized_y = v->resized_y;
1058 }
1059 
1060 static const struct got_error *
1061 view_close_child(struct tog_view *view)
1062 {
1063 	const struct got_error *err = NULL;
1064 
1065 	if (view->child == NULL)
1066 		return NULL;
1067 
1068 	err = view_close(view->child);
1069 	view->child = NULL;
1070 	return err;
1071 }
1072 
1073 static const struct got_error *
1074 view_set_child(struct tog_view *view, struct tog_view *child)
1075 {
1076 	const struct got_error *err = NULL;
1077 
1078 	view->child = child;
1079 	child->parent = view;
1080 
1081 	err = view_resize(view);
1082 	if (err)
1083 		return err;
1084 
1085 	if (view->child->resized_x || view->child->resized_y)
1086 		err = view_resize_split(view, 0);
1087 
1088 	return err;
1089 }
1090 
1091 static void
1092 tog_resizeterm(void)
1093 {
1094 	int cols, lines;
1095 	struct winsize size;
1096 
1097 	if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &size) < 0) {
1098 		cols = 80;     /* Default */
1099 		lines = 24;
1100 	} else {
1101 		cols = size.ws_col;
1102 		lines = size.ws_row;
1103 	}
1104 	resize_term(lines, cols);
1105 }
1106 
1107 static const struct got_error *
1108 view_search_start(struct tog_view *view)
1109 {
1110 	const struct got_error *err = NULL;
1111 	struct tog_view *v = view;
1112 	char pattern[1024];
1113 	int ret;
1114 
1115 	if (view->search_started) {
1116 		regfree(&view->regex);
1117 		view->searching = 0;
1118 		memset(&view->regmatch, 0, sizeof(view->regmatch));
1119 	}
1120 	view->search_started = 0;
1121 
1122 	if (view->nlines < 1)
1123 		return NULL;
1124 
1125 	if (view_is_hsplit_top(view))
1126 		v = view->child;
1127 
1128 	mvwaddstr(v->window, v->nlines - 1, 0, "/");
1129 	wclrtoeol(v->window);
1130 
1131 	nodelay(view->window, FALSE);  /* block for search term input */
1132 	nocbreak();
1133 	echo();
1134 	ret = wgetnstr(v->window, pattern, sizeof(pattern));
1135 	wrefresh(v->window);
1136 	cbreak();
1137 	noecho();
1138 	nodelay(view->window, TRUE);
1139 	if (ret == ERR)
1140 		return NULL;
1141 
1142 	if (regcomp(&view->regex, pattern, REG_EXTENDED | REG_NEWLINE) == 0) {
1143 		err = view->search_start(view);
1144 		if (err) {
1145 			regfree(&view->regex);
1146 			return err;
1147 		}
1148 		view->search_started = 1;
1149 		view->searching = TOG_SEARCH_FORWARD;
1150 		view->search_next_done = 0;
1151 		view->search_next(view);
1152 	}
1153 
1154 	return NULL;
1155 }
1156 
1157 /* Switch split mode. If view is a parent or child, draw the new splitscreen. */
1158 static const struct got_error *
1159 switch_split(struct tog_view *view)
1160 {
1161 	const struct got_error	*err = NULL;
1162 	struct tog_view		*v = NULL;
1163 
1164 	if (view->parent)
1165 		v = view->parent;
1166 	else
1167 		v = view;
1168 
1169 	if (v->mode == TOG_VIEW_SPLIT_HRZN)
1170 		v->mode = TOG_VIEW_SPLIT_VERT;
1171 	else
1172 		v->mode = TOG_VIEW_SPLIT_HRZN;
1173 
1174 	if (!v->child)
1175 		return NULL;
1176 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->cols < 120)
1177 		v->mode = TOG_VIEW_SPLIT_NONE;
1178 
1179 	view_get_split(v, &v->child->begin_y, &v->child->begin_x);
1180 	if (v->mode == TOG_VIEW_SPLIT_HRZN && v->child->resized_y)
1181 		v->child->begin_y = v->child->resized_y;
1182 	else if (v->mode == TOG_VIEW_SPLIT_VERT && v->child->resized_x)
1183 		v->child->begin_x = v->child->resized_x;
1184 
1185 
1186 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1187 		v->ncols = COLS;
1188 		v->child->ncols = COLS;
1189 		v->child->nscrolled = LINES - v->child->nlines;
1190 
1191 		err = view_init_hsplit(v, v->child->begin_y);
1192 		if (err)
1193 			return err;
1194 	}
1195 	v->child->mode = v->mode;
1196 	v->child->nlines = v->lines - v->child->begin_y;
1197 	v->focus_child = 1;
1198 
1199 	err = view_fullscreen(v);
1200 	if (err)
1201 		return err;
1202 	err = view_splitscreen(v->child);
1203 	if (err)
1204 		return err;
1205 
1206 	if (v->mode == TOG_VIEW_SPLIT_NONE)
1207 		v->mode = TOG_VIEW_SPLIT_VERT;
1208 	if (v->mode == TOG_VIEW_SPLIT_HRZN) {
1209 		err = offset_selection_down(v);
1210 		err = offset_selection_down(v->child);
1211 	} else {
1212 		offset_selection_up(v);
1213 		offset_selection_up(v->child);
1214 	}
1215 	if (v->resize)
1216 		err = v->resize(v, 0);
1217 	else if (v->child->resize)
1218 		err = v->child->resize(v->child, 0);
1219 
1220 	return err;
1221 }
1222 
1223 /*
1224  * Compute view->count from numeric input. Assign total to view->count and
1225  * return first non-numeric key entered.
1226  */
1227 static int
1228 get_compound_key(struct tog_view *view, int c)
1229 {
1230 	struct tog_view	*v = view;
1231 	int		 x, n = 0;
1232 
1233 	if (view_is_hsplit_top(view))
1234 		v = view->child;
1235 	else if (view->mode == TOG_VIEW_SPLIT_VERT && view->parent)
1236 		v = view->parent;
1237 
1238 	view->count = 0;
1239 	cbreak();  /* block for input */
1240 	wmove(v->window, v->nlines - 1, 0);
1241 	wclrtoeol(v->window);
1242 	waddch(v->window, ':');
1243 
1244 	do {
1245 		x = getcurx(v->window);
1246 		if (x != ERR && x < view->ncols) {
1247 			waddch(v->window, c);
1248 			wrefresh(v->window);
1249 		}
1250 
1251 		/*
1252 		 * Don't overflow. Max valid request should be the greatest
1253 		 * between the longest and total lines; cap at 10 million.
1254 		 */
1255 		if (n >= 9999999)
1256 			n = 9999999;
1257 		else
1258 			n = n * 10 + (c - '0');
1259 	} while (((c = wgetch(view->window))) >= '0' && c <= '9' && c != ERR);
1260 
1261 	/* Massage excessive or inapplicable values at the input handler. */
1262 	view->count = n;
1263 
1264 	return c;
1265 }
1266 
1267 static const struct got_error *
1268 view_input(struct tog_view **new, int *done, struct tog_view *view,
1269     struct tog_view_list_head *views)
1270 {
1271 	const struct got_error *err = NULL;
1272 	struct tog_view *v;
1273 	int ch, errcode;
1274 
1275 	*new = NULL;
1276 
1277 	/* Clear "no matches" indicator. */
1278 	if (view->search_next_done == TOG_SEARCH_NO_MORE ||
1279 	    view->search_next_done == TOG_SEARCH_HAVE_NONE) {
1280 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
1281 		view->count = 0;
1282 	}
1283 
1284 	if (view->searching && !view->search_next_done) {
1285 		errcode = pthread_mutex_unlock(&tog_mutex);
1286 		if (errcode)
1287 			return got_error_set_errno(errcode,
1288 			    "pthread_mutex_unlock");
1289 		sched_yield();
1290 		errcode = pthread_mutex_lock(&tog_mutex);
1291 		if (errcode)
1292 			return got_error_set_errno(errcode,
1293 			    "pthread_mutex_lock");
1294 		view->search_next(view);
1295 		return NULL;
1296 	}
1297 
1298 	nodelay(view->window, FALSE);
1299 	/* Allow threads to make progress while we are waiting for input. */
1300 	errcode = pthread_mutex_unlock(&tog_mutex);
1301 	if (errcode)
1302 		return got_error_set_errno(errcode, "pthread_mutex_unlock");
1303 	/* If we have an unfinished count, let C-g or backspace abort. */
1304 	if (view->count && --view->count) {
1305 		cbreak();
1306 		nodelay(view->window, TRUE);
1307 		ch = wgetch(view->window);
1308 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
1309 			view->count = 0;
1310 		else
1311 			ch = view->ch;
1312 	} else {
1313 		ch = wgetch(view->window);
1314 		if (ch >= '1' && ch  <= '9')
1315 			view->ch = ch = get_compound_key(view, ch);
1316 	}
1317 	errcode = pthread_mutex_lock(&tog_mutex);
1318 	if (errcode)
1319 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1320 	nodelay(view->window, TRUE);
1321 
1322 	if (tog_sigwinch_received || tog_sigcont_received) {
1323 		tog_resizeterm();
1324 		tog_sigwinch_received = 0;
1325 		tog_sigcont_received = 0;
1326 		TAILQ_FOREACH(v, views, entry) {
1327 			err = view_resize(v);
1328 			if (err)
1329 				return err;
1330 			err = v->input(new, v, KEY_RESIZE);
1331 			if (err)
1332 				return err;
1333 			if (v->child) {
1334 				err = view_resize(v->child);
1335 				if (err)
1336 					return err;
1337 				err = v->child->input(new, v->child,
1338 				    KEY_RESIZE);
1339 				if (err)
1340 					return err;
1341 				if (v->child->resized_x || v->child->resized_y) {
1342 					err = view_resize_split(v, 0);
1343 					if (err)
1344 						return err;
1345 				}
1346 			}
1347 		}
1348 	}
1349 
1350 	switch (ch) {
1351 	case '\t':
1352 		view->count = 0;
1353 		if (view->child) {
1354 			view->focussed = 0;
1355 			view->child->focussed = 1;
1356 			view->focus_child = 1;
1357 		} else if (view->parent) {
1358 			view->focussed = 0;
1359 			view->parent->focussed = 1;
1360 			view->parent->focus_child = 0;
1361 			if (!view_is_splitscreen(view)) {
1362 				if (view->parent->resize) {
1363 					err = view->parent->resize(view->parent,
1364 					    0);
1365 					if (err)
1366 						return err;
1367 				}
1368 				offset_selection_up(view->parent);
1369 				err = view_fullscreen(view->parent);
1370 				if (err)
1371 					return err;
1372 			}
1373 		}
1374 		break;
1375 	case 'q':
1376 		if (view->parent && view->mode == TOG_VIEW_SPLIT_HRZN) {
1377 			if (view->parent->resize) {
1378 				/* might need more commits to fill fullscreen */
1379 				err = view->parent->resize(view->parent, 0);
1380 				if (err)
1381 					break;
1382 			}
1383 			offset_selection_up(view->parent);
1384 		}
1385 		err = view->input(new, view, ch);
1386 		view->dying = 1;
1387 		break;
1388 	case 'Q':
1389 		*done = 1;
1390 		break;
1391 	case 'F':
1392 		view->count = 0;
1393 		if (view_is_parent_view(view)) {
1394 			if (view->child == NULL)
1395 				break;
1396 			if (view_is_splitscreen(view->child)) {
1397 				view->focussed = 0;
1398 				view->child->focussed = 1;
1399 				err = view_fullscreen(view->child);
1400 			} else {
1401 				err = view_splitscreen(view->child);
1402 				if (!err)
1403 					err = view_resize_split(view, 0);
1404 			}
1405 			if (err)
1406 				break;
1407 			err = view->child->input(new, view->child,
1408 			    KEY_RESIZE);
1409 		} else {
1410 			if (view_is_splitscreen(view)) {
1411 				view->parent->focussed = 0;
1412 				view->focussed = 1;
1413 				err = view_fullscreen(view);
1414 			} else {
1415 				err = view_splitscreen(view);
1416 				if (!err && view->mode != TOG_VIEW_SPLIT_HRZN)
1417 					err = view_resize(view->parent);
1418 				if (!err)
1419 					err = view_resize_split(view, 0);
1420 			}
1421 			if (err)
1422 				break;
1423 			err = view->input(new, view, KEY_RESIZE);
1424 		}
1425 		if (err)
1426 			break;
1427 		if (view->resize) {
1428 			err = view->resize(view, 0);
1429 			if (err)
1430 				break;
1431 		}
1432 		if (view->parent)
1433 			err = offset_selection_down(view->parent);
1434 		if (!err)
1435 			err = offset_selection_down(view);
1436 		break;
1437 	case 'S':
1438 		view->count = 0;
1439 		err = switch_split(view);
1440 		break;
1441 	case '-':
1442 		err = view_resize_split(view, -1);
1443 		break;
1444 	case '+':
1445 		err = view_resize_split(view, 1);
1446 		break;
1447 	case KEY_RESIZE:
1448 		break;
1449 	case '/':
1450 		view->count = 0;
1451 		if (view->search_start)
1452 			view_search_start(view);
1453 		else
1454 			err = view->input(new, view, ch);
1455 		break;
1456 	case 'N':
1457 	case 'n':
1458 		if (view->search_started && view->search_next) {
1459 			view->searching = (ch == 'n' ?
1460 			    TOG_SEARCH_FORWARD : TOG_SEARCH_BACKWARD);
1461 			view->search_next_done = 0;
1462 			view->search_next(view);
1463 		} else
1464 			err = view->input(new, view, ch);
1465 		break;
1466 	case 'A':
1467 		if (tog_diff_algo == GOT_DIFF_ALGORITHM_MYERS)
1468 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
1469 		else
1470 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
1471 		TAILQ_FOREACH(v, views, entry) {
1472 			if (v->reset) {
1473 				err = v->reset(v);
1474 				if (err)
1475 					return err;
1476 			}
1477 			if (v->child && v->child->reset) {
1478 				err = v->child->reset(v->child);
1479 				if (err)
1480 					return err;
1481 			}
1482 		}
1483 		break;
1484 	default:
1485 		err = view->input(new, view, ch);
1486 		break;
1487 	}
1488 
1489 	return err;
1490 }
1491 
1492 static int
1493 view_needs_focus_indication(struct tog_view *view)
1494 {
1495 	if (view_is_parent_view(view)) {
1496 		if (view->child == NULL || view->child->focussed)
1497 			return 0;
1498 		if (!view_is_splitscreen(view->child))
1499 			return 0;
1500 	} else if (!view_is_splitscreen(view))
1501 		return 0;
1502 
1503 	return view->focussed;
1504 }
1505 
1506 static const struct got_error *
1507 view_loop(struct tog_view *view)
1508 {
1509 	const struct got_error *err = NULL;
1510 	struct tog_view_list_head views;
1511 	struct tog_view *new_view;
1512 	char *mode;
1513 	int fast_refresh = 10;
1514 	int done = 0, errcode;
1515 
1516 	mode = getenv("TOG_VIEW_SPLIT_MODE");
1517 	if (!mode || !(*mode == 'h' || *mode == 'H'))
1518 		view->mode = TOG_VIEW_SPLIT_VERT;
1519 	else
1520 		view->mode = TOG_VIEW_SPLIT_HRZN;
1521 
1522 	errcode = pthread_mutex_lock(&tog_mutex);
1523 	if (errcode)
1524 		return got_error_set_errno(errcode, "pthread_mutex_lock");
1525 
1526 	TAILQ_INIT(&views);
1527 	TAILQ_INSERT_HEAD(&views, view, entry);
1528 
1529 	view->focussed = 1;
1530 	err = view->show(view);
1531 	if (err)
1532 		return err;
1533 	update_panels();
1534 	doupdate();
1535 	while (!TAILQ_EMPTY(&views) && !done && !tog_thread_error &&
1536 	    !tog_fatal_signal_received()) {
1537 		/* Refresh fast during initialization, then become slower. */
1538 		if (fast_refresh && fast_refresh-- == 0)
1539 			halfdelay(10); /* switch to once per second */
1540 
1541 		err = view_input(&new_view, &done, view, &views);
1542 		if (err)
1543 			break;
1544 		if (view->dying) {
1545 			struct tog_view *v, *prev = NULL;
1546 
1547 			if (view_is_parent_view(view))
1548 				prev = TAILQ_PREV(view, tog_view_list_head,
1549 				    entry);
1550 			else if (view->parent)
1551 				prev = view->parent;
1552 
1553 			if (view->parent) {
1554 				view->parent->child = NULL;
1555 				view->parent->focus_child = 0;
1556 				/* Restore fullscreen line height. */
1557 				view->parent->nlines = view->parent->lines;
1558 				err = view_resize(view->parent);
1559 				if (err)
1560 					break;
1561 				/* Make resized splits persist. */
1562 				view_transfer_size(view->parent, view);
1563 			} else
1564 				TAILQ_REMOVE(&views, view, entry);
1565 
1566 			err = view_close(view);
1567 			if (err)
1568 				goto done;
1569 
1570 			view = NULL;
1571 			TAILQ_FOREACH(v, &views, entry) {
1572 				if (v->focussed)
1573 					break;
1574 			}
1575 			if (view == NULL && new_view == NULL) {
1576 				/* No view has focus. Try to pick one. */
1577 				if (prev)
1578 					view = prev;
1579 				else if (!TAILQ_EMPTY(&views)) {
1580 					view = TAILQ_LAST(&views,
1581 					    tog_view_list_head);
1582 				}
1583 				if (view) {
1584 					if (view->focus_child) {
1585 						view->child->focussed = 1;
1586 						view = view->child;
1587 					} else
1588 						view->focussed = 1;
1589 				}
1590 			}
1591 		}
1592 		if (new_view) {
1593 			struct tog_view *v, *t;
1594 			/* Only allow one parent view per type. */
1595 			TAILQ_FOREACH_SAFE(v, &views, entry, t) {
1596 				if (v->type != new_view->type)
1597 					continue;
1598 				TAILQ_REMOVE(&views, v, entry);
1599 				err = view_close(v);
1600 				if (err)
1601 					goto done;
1602 				break;
1603 			}
1604 			TAILQ_INSERT_TAIL(&views, new_view, entry);
1605 			view = new_view;
1606 		}
1607 		if (view) {
1608 			if (view_is_parent_view(view)) {
1609 				if (view->child && view->child->focussed)
1610 					view = view->child;
1611 			} else {
1612 				if (view->parent && view->parent->focussed)
1613 					view = view->parent;
1614 			}
1615 			show_panel(view->panel);
1616 			if (view->child && view_is_splitscreen(view->child))
1617 				show_panel(view->child->panel);
1618 			if (view->parent && view_is_splitscreen(view)) {
1619 				err = view->parent->show(view->parent);
1620 				if (err)
1621 					goto done;
1622 			}
1623 			err = view->show(view);
1624 			if (err)
1625 				goto done;
1626 			if (view->child) {
1627 				err = view->child->show(view->child);
1628 				if (err)
1629 					goto done;
1630 			}
1631 			update_panels();
1632 			doupdate();
1633 		}
1634 	}
1635 done:
1636 	while (!TAILQ_EMPTY(&views)) {
1637 		const struct got_error *close_err;
1638 		view = TAILQ_FIRST(&views);
1639 		TAILQ_REMOVE(&views, view, entry);
1640 		close_err = view_close(view);
1641 		if (close_err && err == NULL)
1642 			err = close_err;
1643 	}
1644 
1645 	errcode = pthread_mutex_unlock(&tog_mutex);
1646 	if (errcode && err == NULL)
1647 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
1648 
1649 	return err;
1650 }
1651 
1652 __dead static void
1653 usage_log(void)
1654 {
1655 	endwin();
1656 	fprintf(stderr,
1657 	    "usage: %s log [-b] [-c commit] [-r repository-path] [path]\n",
1658 	    getprogname());
1659 	exit(1);
1660 }
1661 
1662 /* Create newly allocated wide-character string equivalent to a byte string. */
1663 static const struct got_error *
1664 mbs2ws(wchar_t **ws, size_t *wlen, const char *s)
1665 {
1666 	char *vis = NULL;
1667 	const struct got_error *err = NULL;
1668 
1669 	*ws = NULL;
1670 	*wlen = mbstowcs(NULL, s, 0);
1671 	if (*wlen == (size_t)-1) {
1672 		int vislen;
1673 		if (errno != EILSEQ)
1674 			return got_error_from_errno("mbstowcs");
1675 
1676 		/* byte string invalid in current encoding; try to "fix" it */
1677 		err = got_mbsavis(&vis, &vislen, s);
1678 		if (err)
1679 			return err;
1680 		*wlen = mbstowcs(NULL, vis, 0);
1681 		if (*wlen == (size_t)-1) {
1682 			err = got_error_from_errno("mbstowcs"); /* give up */
1683 			goto done;
1684 		}
1685 	}
1686 
1687 	*ws = calloc(*wlen + 1, sizeof(**ws));
1688 	if (*ws == NULL) {
1689 		err = got_error_from_errno("calloc");
1690 		goto done;
1691 	}
1692 
1693 	if (mbstowcs(*ws, vis ? vis : s, *wlen) != *wlen)
1694 		err = got_error_from_errno("mbstowcs");
1695 done:
1696 	free(vis);
1697 	if (err) {
1698 		free(*ws);
1699 		*ws = NULL;
1700 		*wlen = 0;
1701 	}
1702 	return err;
1703 }
1704 
1705 static const struct got_error *
1706 expand_tab(char **ptr, const char *src)
1707 {
1708 	char	*dst;
1709 	size_t	 len, n, idx = 0, sz = 0;
1710 
1711 	*ptr = NULL;
1712 	n = len = strlen(src);
1713 	dst = malloc(n + 1);
1714 	if (dst == NULL)
1715 		return got_error_from_errno("malloc");
1716 
1717 	while (idx < len && src[idx]) {
1718 		const char c = src[idx];
1719 
1720 		if (c == '\t') {
1721 			size_t nb = TABSIZE - sz % TABSIZE;
1722 			char *p;
1723 
1724 			p = realloc(dst, n + nb);
1725 			if (p == NULL) {
1726 				free(dst);
1727 				return got_error_from_errno("realloc");
1728 
1729 			}
1730 			dst = p;
1731 			n += nb;
1732 			memset(dst + sz, ' ', nb);
1733 			sz += nb;
1734 		} else
1735 			dst[sz++] = src[idx];
1736 		++idx;
1737 	}
1738 
1739 	dst[sz] = '\0';
1740 	*ptr = dst;
1741 	return NULL;
1742 }
1743 
1744 /*
1745  * Advance at most n columns from wline starting at offset off.
1746  * Return the index to the first character after the span operation.
1747  * Return the combined column width of all spanned wide character in
1748  * *rcol.
1749  */
1750 static int
1751 span_wline(int *rcol, int off, wchar_t *wline, int n, int col_tab_align)
1752 {
1753 	int width, i, cols = 0;
1754 
1755 	if (n == 0) {
1756 		*rcol = cols;
1757 		return off;
1758 	}
1759 
1760 	for (i = off; wline[i] != L'\0'; ++i) {
1761 		if (wline[i] == L'\t')
1762 			width = TABSIZE - ((cols + col_tab_align) % TABSIZE);
1763 		else
1764 			width = wcwidth(wline[i]);
1765 
1766 		if (width == -1) {
1767 			width = 1;
1768 			wline[i] = L'.';
1769 		}
1770 
1771 		if (cols + width > n)
1772 			break;
1773 		cols += width;
1774 	}
1775 
1776 	*rcol = cols;
1777 	return i;
1778 }
1779 
1780 /*
1781  * Format a line for display, ensuring that it won't overflow a width limit.
1782  * With scrolling, the width returned refers to the scrolled version of the
1783  * line, which starts at (*wlinep)[*scrollxp]. The caller must free *wlinep.
1784  */
1785 static const struct got_error *
1786 format_line(wchar_t **wlinep, int *widthp, int *scrollxp,
1787     const char *line, int nscroll, int wlimit, int col_tab_align, int expand)
1788 {
1789 	const struct got_error *err = NULL;
1790 	int cols;
1791 	wchar_t *wline = NULL;
1792 	char *exstr = NULL;
1793 	size_t wlen;
1794 	int i, scrollx;
1795 
1796 	*wlinep = NULL;
1797 	*widthp = 0;
1798 
1799 	if (expand) {
1800 		err = expand_tab(&exstr, line);
1801 		if (err)
1802 			return err;
1803 	}
1804 
1805 	err = mbs2ws(&wline, &wlen, expand ? exstr : line);
1806 	free(exstr);
1807 	if (err)
1808 		return err;
1809 
1810 	scrollx = span_wline(&cols, 0, wline, nscroll, col_tab_align);
1811 
1812 	if (wlen > 0 && wline[wlen - 1] == L'\n') {
1813 		wline[wlen - 1] = L'\0';
1814 		wlen--;
1815 	}
1816 	if (wlen > 0 && wline[wlen - 1] == L'\r') {
1817 		wline[wlen - 1] = L'\0';
1818 		wlen--;
1819 	}
1820 
1821 	i = span_wline(&cols, scrollx, wline, wlimit, col_tab_align);
1822 	wline[i] = L'\0';
1823 
1824 	if (widthp)
1825 		*widthp = cols;
1826 	if (scrollxp)
1827 		*scrollxp = scrollx;
1828 	if (err)
1829 		free(wline);
1830 	else
1831 		*wlinep = wline;
1832 	return err;
1833 }
1834 
1835 static const struct got_error*
1836 build_refs_str(char **refs_str, struct got_reflist_head *refs,
1837     struct got_object_id *id, struct got_repository *repo)
1838 {
1839 	static const struct got_error *err = NULL;
1840 	struct got_reflist_entry *re;
1841 	char *s;
1842 	const char *name;
1843 
1844 	*refs_str = NULL;
1845 
1846 	TAILQ_FOREACH(re, refs, entry) {
1847 		struct got_tag_object *tag = NULL;
1848 		struct got_object_id *ref_id;
1849 		int cmp;
1850 
1851 		name = got_ref_get_name(re->ref);
1852 		if (strcmp(name, GOT_REF_HEAD) == 0)
1853 			continue;
1854 		if (strncmp(name, "refs/", 5) == 0)
1855 			name += 5;
1856 		if (strncmp(name, "got/", 4) == 0 &&
1857 		    strncmp(name, "got/backup/", 11) != 0)
1858 			continue;
1859 		if (strncmp(name, "heads/", 6) == 0)
1860 			name += 6;
1861 		if (strncmp(name, "remotes/", 8) == 0) {
1862 			name += 8;
1863 			s = strstr(name, "/" GOT_REF_HEAD);
1864 			if (s != NULL && s[strlen(s)] == '\0')
1865 				continue;
1866 		}
1867 		err = got_ref_resolve(&ref_id, repo, re->ref);
1868 		if (err)
1869 			break;
1870 		if (strncmp(name, "tags/", 5) == 0) {
1871 			err = got_object_open_as_tag(&tag, repo, ref_id);
1872 			if (err) {
1873 				if (err->code != GOT_ERR_OBJ_TYPE) {
1874 					free(ref_id);
1875 					break;
1876 				}
1877 				/* Ref points at something other than a tag. */
1878 				err = NULL;
1879 				tag = NULL;
1880 			}
1881 		}
1882 		cmp = got_object_id_cmp(tag ?
1883 		    got_object_tag_get_object_id(tag) : ref_id, id);
1884 		free(ref_id);
1885 		if (tag)
1886 			got_object_tag_close(tag);
1887 		if (cmp != 0)
1888 			continue;
1889 		s = *refs_str;
1890 		if (asprintf(refs_str, "%s%s%s", s ? s : "",
1891 		    s ? ", " : "", name) == -1) {
1892 			err = got_error_from_errno("asprintf");
1893 			free(s);
1894 			*refs_str = NULL;
1895 			break;
1896 		}
1897 		free(s);
1898 	}
1899 
1900 	return err;
1901 }
1902 
1903 static const struct got_error *
1904 format_author(wchar_t **wauthor, int *author_width, char *author, int limit,
1905     int col_tab_align)
1906 {
1907 	char *smallerthan;
1908 
1909 	smallerthan = strchr(author, '<');
1910 	if (smallerthan && smallerthan[1] != '\0')
1911 		author = smallerthan + 1;
1912 	author[strcspn(author, "@>")] = '\0';
1913 	return format_line(wauthor, author_width, NULL, author, 0, limit,
1914 	    col_tab_align, 0);
1915 }
1916 
1917 static const struct got_error *
1918 draw_commit(struct tog_view *view, struct got_commit_object *commit,
1919     struct got_object_id *id, const size_t date_display_cols,
1920     int author_display_cols)
1921 {
1922 	struct tog_log_view_state *s = &view->state.log;
1923 	const struct got_error *err = NULL;
1924 	char datebuf[12]; /* YYYY-MM-DD + SPACE + NUL */
1925 	char *logmsg0 = NULL, *logmsg = NULL;
1926 	char *author = NULL;
1927 	wchar_t *wlogmsg = NULL, *wauthor = NULL;
1928 	int author_width, logmsg_width;
1929 	char *newline, *line = NULL;
1930 	int col, limit, scrollx;
1931 	const int avail = view->ncols;
1932 	struct tm tm;
1933 	time_t committer_time;
1934 	struct tog_color *tc;
1935 
1936 	committer_time = got_object_commit_get_committer_time(commit);
1937 	if (gmtime_r(&committer_time, &tm) == NULL)
1938 		return got_error_from_errno("gmtime_r");
1939 	if (strftime(datebuf, sizeof(datebuf), "%G-%m-%d ", &tm) == 0)
1940 		return got_error(GOT_ERR_NO_SPACE);
1941 
1942 	if (avail <= date_display_cols)
1943 		limit = MIN(sizeof(datebuf) - 1, avail);
1944 	else
1945 		limit = MIN(date_display_cols, sizeof(datebuf) - 1);
1946 	tc = get_color(&s->colors, TOG_COLOR_DATE);
1947 	if (tc)
1948 		wattr_on(view->window,
1949 		    COLOR_PAIR(tc->colorpair), NULL);
1950 	waddnstr(view->window, datebuf, limit);
1951 	if (tc)
1952 		wattr_off(view->window,
1953 		    COLOR_PAIR(tc->colorpair), NULL);
1954 	col = limit;
1955 	if (col > avail)
1956 		goto done;
1957 
1958 	if (avail >= 120) {
1959 		char *id_str;
1960 		err = got_object_id_str(&id_str, id);
1961 		if (err)
1962 			goto done;
1963 		tc = get_color(&s->colors, TOG_COLOR_COMMIT);
1964 		if (tc)
1965 			wattr_on(view->window,
1966 			    COLOR_PAIR(tc->colorpair), NULL);
1967 		wprintw(view->window, "%.8s ", id_str);
1968 		if (tc)
1969 			wattr_off(view->window,
1970 			    COLOR_PAIR(tc->colorpair), NULL);
1971 		free(id_str);
1972 		col += 9;
1973 		if (col > avail)
1974 			goto done;
1975 	}
1976 
1977 	if (s->use_committer)
1978 		author = strdup(got_object_commit_get_committer(commit));
1979 	else
1980 		author = strdup(got_object_commit_get_author(commit));
1981 	if (author == NULL) {
1982 		err = got_error_from_errno("strdup");
1983 		goto done;
1984 	}
1985 	err = format_author(&wauthor, &author_width, author, avail - col, col);
1986 	if (err)
1987 		goto done;
1988 	tc = get_color(&s->colors, TOG_COLOR_AUTHOR);
1989 	if (tc)
1990 		wattr_on(view->window,
1991 		    COLOR_PAIR(tc->colorpair), NULL);
1992 	waddwstr(view->window, wauthor);
1993 	if (tc)
1994 		wattr_off(view->window,
1995 		    COLOR_PAIR(tc->colorpair), NULL);
1996 	col += author_width;
1997 	while (col < avail && author_width < author_display_cols + 2) {
1998 		waddch(view->window, ' ');
1999 		col++;
2000 		author_width++;
2001 	}
2002 	if (col > avail)
2003 		goto done;
2004 
2005 	err = got_object_commit_get_logmsg(&logmsg0, commit);
2006 	if (err)
2007 		goto done;
2008 	logmsg = logmsg0;
2009 	while (*logmsg == '\n')
2010 		logmsg++;
2011 	newline = strchr(logmsg, '\n');
2012 	if (newline)
2013 		*newline = '\0';
2014 	limit = avail - col;
2015 	if (view->child && !view_is_hsplit_top(view) && limit > 0)
2016 		limit--;	/* for the border */
2017 	err = format_line(&wlogmsg, &logmsg_width, &scrollx, logmsg, view->x,
2018 	    limit, col, 1);
2019 	if (err)
2020 		goto done;
2021 	waddwstr(view->window, &wlogmsg[scrollx]);
2022 	col += MAX(logmsg_width, 0);
2023 	while (col < avail) {
2024 		waddch(view->window, ' ');
2025 		col++;
2026 	}
2027 done:
2028 	free(logmsg0);
2029 	free(wlogmsg);
2030 	free(author);
2031 	free(wauthor);
2032 	free(line);
2033 	return err;
2034 }
2035 
2036 static struct commit_queue_entry *
2037 alloc_commit_queue_entry(struct got_commit_object *commit,
2038     struct got_object_id *id)
2039 {
2040 	struct commit_queue_entry *entry;
2041 
2042 	entry = calloc(1, sizeof(*entry));
2043 	if (entry == NULL)
2044 		return NULL;
2045 
2046 	entry->id = id;
2047 	entry->commit = commit;
2048 	return entry;
2049 }
2050 
2051 static void
2052 pop_commit(struct commit_queue *commits)
2053 {
2054 	struct commit_queue_entry *entry;
2055 
2056 	entry = TAILQ_FIRST(&commits->head);
2057 	TAILQ_REMOVE(&commits->head, entry, entry);
2058 	got_object_commit_close(entry->commit);
2059 	commits->ncommits--;
2060 	/* Don't free entry->id! It is owned by the commit graph. */
2061 	free(entry);
2062 }
2063 
2064 static void
2065 free_commits(struct commit_queue *commits)
2066 {
2067 	while (!TAILQ_EMPTY(&commits->head))
2068 		pop_commit(commits);
2069 }
2070 
2071 static const struct got_error *
2072 match_commit(int *have_match, struct got_object_id *id,
2073     struct got_commit_object *commit, regex_t *regex)
2074 {
2075 	const struct got_error *err = NULL;
2076 	regmatch_t regmatch;
2077 	char *id_str = NULL, *logmsg = NULL;
2078 
2079 	*have_match = 0;
2080 
2081 	err = got_object_id_str(&id_str, id);
2082 	if (err)
2083 		return err;
2084 
2085 	err = got_object_commit_get_logmsg(&logmsg, commit);
2086 	if (err)
2087 		goto done;
2088 
2089 	if (regexec(regex, got_object_commit_get_author(commit), 1,
2090 	    &regmatch, 0) == 0 ||
2091 	    regexec(regex, got_object_commit_get_committer(commit), 1,
2092 	    &regmatch, 0) == 0 ||
2093 	    regexec(regex, id_str, 1, &regmatch, 0) == 0 ||
2094 	    regexec(regex, logmsg, 1, &regmatch, 0) == 0)
2095 		*have_match = 1;
2096 done:
2097 	free(id_str);
2098 	free(logmsg);
2099 	return err;
2100 }
2101 
2102 static const struct got_error *
2103 queue_commits(struct tog_log_thread_args *a)
2104 {
2105 	const struct got_error *err = NULL;
2106 
2107 	/*
2108 	 * We keep all commits open throughout the lifetime of the log
2109 	 * view in order to avoid having to re-fetch commits from disk
2110 	 * while updating the display.
2111 	 */
2112 	do {
2113 		struct got_object_id *id;
2114 		struct got_commit_object *commit;
2115 		struct commit_queue_entry *entry;
2116 		int errcode;
2117 
2118 		err = got_commit_graph_iter_next(&id, a->graph, a->repo,
2119 		    NULL, NULL);
2120 		if (err || id == NULL)
2121 			break;
2122 
2123 		err = got_object_open_as_commit(&commit, a->repo, id);
2124 		if (err)
2125 			break;
2126 		entry = alloc_commit_queue_entry(commit, id);
2127 		if (entry == NULL) {
2128 			err = got_error_from_errno("alloc_commit_queue_entry");
2129 			break;
2130 		}
2131 
2132 		errcode = pthread_mutex_lock(&tog_mutex);
2133 		if (errcode) {
2134 			err = got_error_set_errno(errcode,
2135 			    "pthread_mutex_lock");
2136 			break;
2137 		}
2138 
2139 		entry->idx = a->commits->ncommits;
2140 		TAILQ_INSERT_TAIL(&a->commits->head, entry, entry);
2141 		a->commits->ncommits++;
2142 
2143 		if (*a->searching == TOG_SEARCH_FORWARD &&
2144 		    !*a->search_next_done) {
2145 			int have_match;
2146 			err = match_commit(&have_match, id, commit, a->regex);
2147 			if (err)
2148 				break;
2149 			if (have_match)
2150 				*a->search_next_done = TOG_SEARCH_HAVE_MORE;
2151 		}
2152 
2153 		errcode = pthread_mutex_unlock(&tog_mutex);
2154 		if (errcode && err == NULL)
2155 			err = got_error_set_errno(errcode,
2156 			    "pthread_mutex_unlock");
2157 		if (err)
2158 			break;
2159 	} while (*a->searching == TOG_SEARCH_FORWARD && !*a->search_next_done);
2160 
2161 	return err;
2162 }
2163 
2164 static void
2165 select_commit(struct tog_log_view_state *s)
2166 {
2167 	struct commit_queue_entry *entry;
2168 	int ncommits = 0;
2169 
2170 	entry = s->first_displayed_entry;
2171 	while (entry) {
2172 		if (ncommits == s->selected) {
2173 			s->selected_entry = entry;
2174 			break;
2175 		}
2176 		entry = TAILQ_NEXT(entry, entry);
2177 		ncommits++;
2178 	}
2179 }
2180 
2181 static const struct got_error *
2182 draw_commits(struct tog_view *view)
2183 {
2184 	const struct got_error *err = NULL;
2185 	struct tog_log_view_state *s = &view->state.log;
2186 	struct commit_queue_entry *entry = s->selected_entry;
2187 	const int limit = view->nlines;
2188 	int width;
2189 	int ncommits, author_cols = 4;
2190 	char *id_str = NULL, *header = NULL, *ncommits_str = NULL;
2191 	char *refs_str = NULL;
2192 	wchar_t *wline;
2193 	struct tog_color *tc;
2194 	static const size_t date_display_cols = 12;
2195 
2196 	if (s->selected_entry &&
2197 	    !(view->searching && view->search_next_done == 0)) {
2198 		struct got_reflist_head *refs;
2199 		err = got_object_id_str(&id_str, s->selected_entry->id);
2200 		if (err)
2201 			return err;
2202 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap,
2203 		    s->selected_entry->id);
2204 		if (refs) {
2205 			err = build_refs_str(&refs_str, refs,
2206 			    s->selected_entry->id, s->repo);
2207 			if (err)
2208 				goto done;
2209 		}
2210 	}
2211 
2212 	if (s->thread_args.commits_needed == 0)
2213 		halfdelay(10); /* disable fast refresh */
2214 
2215 	if (s->thread_args.commits_needed > 0 || s->thread_args.load_all) {
2216 		if (asprintf(&ncommits_str, " [%d/%d] %s",
2217 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
2218 		    (view->searching && !view->search_next_done) ?
2219 		    "searching..." : "loading...") == -1) {
2220 			err = got_error_from_errno("asprintf");
2221 			goto done;
2222 		}
2223 	} else {
2224 		const char *search_str = NULL;
2225 
2226 		if (view->searching) {
2227 			if (view->search_next_done == TOG_SEARCH_NO_MORE)
2228 				search_str = "no more matches";
2229 			else if (view->search_next_done == TOG_SEARCH_HAVE_NONE)
2230 				search_str = "no matches found";
2231 			else if (!view->search_next_done)
2232 				search_str = "searching...";
2233 		}
2234 
2235 		if (asprintf(&ncommits_str, " [%d/%d] %s",
2236 		    entry ? entry->idx + 1 : 0, s->commits.ncommits,
2237 		    search_str ? search_str :
2238 		    (refs_str ? refs_str : "")) == -1) {
2239 			err = got_error_from_errno("asprintf");
2240 			goto done;
2241 		}
2242 	}
2243 
2244 	if (s->in_repo_path && strcmp(s->in_repo_path, "/") != 0) {
2245 		if (asprintf(&header, "commit %s %s%s", id_str ? id_str :
2246 		    "........................................",
2247 		    s->in_repo_path, ncommits_str) == -1) {
2248 			err = got_error_from_errno("asprintf");
2249 			header = NULL;
2250 			goto done;
2251 		}
2252 	} else if (asprintf(&header, "commit %s%s",
2253 	    id_str ? id_str : "........................................",
2254 	    ncommits_str) == -1) {
2255 		err = got_error_from_errno("asprintf");
2256 		header = NULL;
2257 		goto done;
2258 	}
2259 	err = format_line(&wline, &width, NULL, header, 0, view->ncols, 0, 0);
2260 	if (err)
2261 		goto done;
2262 
2263 	werase(view->window);
2264 
2265 	if (view_needs_focus_indication(view))
2266 		wstandout(view->window);
2267 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
2268 	if (tc)
2269 		wattr_on(view->window,
2270 		    COLOR_PAIR(tc->colorpair), NULL);
2271 	waddwstr(view->window, wline);
2272 	if (tc)
2273 		wattr_off(view->window,
2274 		    COLOR_PAIR(tc->colorpair), NULL);
2275 	while (width < view->ncols) {
2276 		waddch(view->window, ' ');
2277 		width++;
2278 	}
2279 	if (view_needs_focus_indication(view))
2280 		wstandend(view->window);
2281 	free(wline);
2282 	if (limit <= 1)
2283 		goto done;
2284 
2285 	/* Grow author column size if necessary, and set view->maxx. */
2286 	entry = s->first_displayed_entry;
2287 	ncommits = 0;
2288 	view->maxx = 0;
2289 	while (entry) {
2290 		struct got_commit_object *c = entry->commit;
2291 		char *author, *eol, *msg, *msg0;
2292 		wchar_t *wauthor, *wmsg;
2293 		int width;
2294 		if (ncommits >= limit - 1)
2295 			break;
2296 		if (s->use_committer)
2297 			author = strdup(got_object_commit_get_committer(c));
2298 		else
2299 			author = strdup(got_object_commit_get_author(c));
2300 		if (author == NULL) {
2301 			err = got_error_from_errno("strdup");
2302 			goto done;
2303 		}
2304 		err = format_author(&wauthor, &width, author, COLS,
2305 		    date_display_cols);
2306 		if (author_cols < width)
2307 			author_cols = width;
2308 		free(wauthor);
2309 		free(author);
2310 		if (err)
2311 			goto done;
2312 		err = got_object_commit_get_logmsg(&msg0, c);
2313 		if (err)
2314 			goto done;
2315 		msg = msg0;
2316 		while (*msg == '\n')
2317 			++msg;
2318 		if ((eol = strchr(msg, '\n')))
2319 			*eol = '\0';
2320 		err = format_line(&wmsg, &width, NULL, msg, 0, INT_MAX,
2321 		    date_display_cols + author_cols, 0);
2322 		if (err)
2323 			goto done;
2324 		view->maxx = MAX(view->maxx, width);
2325 		free(msg0);
2326 		free(wmsg);
2327 		ncommits++;
2328 		entry = TAILQ_NEXT(entry, entry);
2329 	}
2330 
2331 	entry = s->first_displayed_entry;
2332 	s->last_displayed_entry = s->first_displayed_entry;
2333 	ncommits = 0;
2334 	while (entry) {
2335 		if (ncommits >= limit - 1)
2336 			break;
2337 		if (ncommits == s->selected)
2338 			wstandout(view->window);
2339 		err = draw_commit(view, entry->commit, entry->id,
2340 		    date_display_cols, author_cols);
2341 		if (ncommits == s->selected)
2342 			wstandend(view->window);
2343 		if (err)
2344 			goto done;
2345 		ncommits++;
2346 		s->last_displayed_entry = entry;
2347 		entry = TAILQ_NEXT(entry, entry);
2348 	}
2349 
2350 	view_border(view);
2351 done:
2352 	free(id_str);
2353 	free(refs_str);
2354 	free(ncommits_str);
2355 	free(header);
2356 	return err;
2357 }
2358 
2359 static void
2360 log_scroll_up(struct tog_log_view_state *s, int maxscroll)
2361 {
2362 	struct commit_queue_entry *entry;
2363 	int nscrolled = 0;
2364 
2365 	entry = TAILQ_FIRST(&s->commits.head);
2366 	if (s->first_displayed_entry == entry)
2367 		return;
2368 
2369 	entry = s->first_displayed_entry;
2370 	while (entry && nscrolled < maxscroll) {
2371 		entry = TAILQ_PREV(entry, commit_queue_head, entry);
2372 		if (entry) {
2373 			s->first_displayed_entry = entry;
2374 			nscrolled++;
2375 		}
2376 	}
2377 }
2378 
2379 static const struct got_error *
2380 trigger_log_thread(struct tog_view *view, int wait)
2381 {
2382 	struct tog_log_thread_args *ta = &view->state.log.thread_args;
2383 	int errcode;
2384 
2385 	halfdelay(1); /* fast refresh while loading commits */
2386 
2387 	while (!ta->log_complete && !tog_thread_error &&
2388 	    (ta->commits_needed > 0 || ta->load_all)) {
2389 		/* Wake the log thread. */
2390 		errcode = pthread_cond_signal(&ta->need_commits);
2391 		if (errcode)
2392 			return got_error_set_errno(errcode,
2393 			    "pthread_cond_signal");
2394 
2395 		/*
2396 		 * The mutex will be released while the view loop waits
2397 		 * in wgetch(), at which time the log thread will run.
2398 		 */
2399 		if (!wait)
2400 			break;
2401 
2402 		/* Display progress update in log view. */
2403 		show_log_view(view);
2404 		update_panels();
2405 		doupdate();
2406 
2407 		/* Wait right here while next commit is being loaded. */
2408 		errcode = pthread_cond_wait(&ta->commit_loaded, &tog_mutex);
2409 		if (errcode)
2410 			return got_error_set_errno(errcode,
2411 			    "pthread_cond_wait");
2412 
2413 		/* Display progress update in log view. */
2414 		show_log_view(view);
2415 		update_panels();
2416 		doupdate();
2417 	}
2418 
2419 	return NULL;
2420 }
2421 
2422 static const struct got_error *
2423 request_log_commits(struct tog_view *view)
2424 {
2425 	struct tog_log_view_state	*state = &view->state.log;
2426 	const struct got_error		*err = NULL;
2427 
2428 	if (state->thread_args.log_complete)
2429 		return NULL;
2430 
2431 	state->thread_args.commits_needed += view->nscrolled;
2432 	err = trigger_log_thread(view, 1);
2433 	view->nscrolled = 0;
2434 
2435 	return err;
2436 }
2437 
2438 static const struct got_error *
2439 log_scroll_down(struct tog_view *view, int maxscroll)
2440 {
2441 	struct tog_log_view_state *s = &view->state.log;
2442 	const struct got_error *err = NULL;
2443 	struct commit_queue_entry *pentry;
2444 	int nscrolled = 0, ncommits_needed;
2445 
2446 	if (s->last_displayed_entry == NULL)
2447 		return NULL;
2448 
2449 	ncommits_needed = s->last_displayed_entry->idx + 1 + maxscroll;
2450 	if (s->commits.ncommits < ncommits_needed &&
2451 	    !s->thread_args.log_complete) {
2452 		/*
2453 		 * Ask the log thread for required amount of commits.
2454 		 */
2455 		s->thread_args.commits_needed += maxscroll;
2456 		err = trigger_log_thread(view, 1);
2457 		if (err)
2458 			return err;
2459 	}
2460 
2461 	do {
2462 		pentry = TAILQ_NEXT(s->last_displayed_entry, entry);
2463 		if (pentry == NULL && view->mode != TOG_VIEW_SPLIT_HRZN)
2464 			break;
2465 
2466 		s->last_displayed_entry = pentry ?
2467 		    pentry : s->last_displayed_entry;;
2468 
2469 		pentry = TAILQ_NEXT(s->first_displayed_entry, entry);
2470 		if (pentry == NULL)
2471 			break;
2472 		s->first_displayed_entry = pentry;
2473 	} while (++nscrolled < maxscroll);
2474 
2475 	if (view->mode == TOG_VIEW_SPLIT_HRZN && !s->thread_args.log_complete)
2476 		view->nscrolled += nscrolled;
2477 	else
2478 		view->nscrolled = 0;
2479 
2480 	return err;
2481 }
2482 
2483 static const struct got_error *
2484 open_diff_view_for_commit(struct tog_view **new_view, int begin_y, int begin_x,
2485     struct got_commit_object *commit, struct got_object_id *commit_id,
2486     struct tog_view *log_view, struct got_repository *repo)
2487 {
2488 	const struct got_error *err;
2489 	struct got_object_qid *parent_id;
2490 	struct tog_view *diff_view;
2491 
2492 	diff_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_DIFF);
2493 	if (diff_view == NULL)
2494 		return got_error_from_errno("view_open");
2495 
2496 	parent_id = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
2497 	err = open_diff_view(diff_view, parent_id ? &parent_id->id : NULL,
2498 	    commit_id, NULL, NULL, 3, 0, 0, log_view, repo);
2499 	if (err == NULL)
2500 		*new_view = diff_view;
2501 	return err;
2502 }
2503 
2504 static const struct got_error *
2505 tree_view_visit_subtree(struct tog_tree_view_state *s,
2506     struct got_tree_object *subtree)
2507 {
2508 	struct tog_parent_tree *parent;
2509 
2510 	parent = calloc(1, sizeof(*parent));
2511 	if (parent == NULL)
2512 		return got_error_from_errno("calloc");
2513 
2514 	parent->tree = s->tree;
2515 	parent->first_displayed_entry = s->first_displayed_entry;
2516 	parent->selected_entry = s->selected_entry;
2517 	parent->selected = s->selected;
2518 	TAILQ_INSERT_HEAD(&s->parents, parent, entry);
2519 	s->tree = subtree;
2520 	s->selected = 0;
2521 	s->first_displayed_entry = NULL;
2522 	return NULL;
2523 }
2524 
2525 static const struct got_error *
2526 tree_view_walk_path(struct tog_tree_view_state *s,
2527     struct got_commit_object *commit, const char *path)
2528 {
2529 	const struct got_error *err = NULL;
2530 	struct got_tree_object *tree = NULL;
2531 	const char *p;
2532 	char *slash, *subpath = NULL;
2533 
2534 	/* Walk the path and open corresponding tree objects. */
2535 	p = path;
2536 	while (*p) {
2537 		struct got_tree_entry *te;
2538 		struct got_object_id *tree_id;
2539 		char *te_name;
2540 
2541 		while (p[0] == '/')
2542 			p++;
2543 
2544 		/* Ensure the correct subtree entry is selected. */
2545 		slash = strchr(p, '/');
2546 		if (slash == NULL)
2547 			te_name = strdup(p);
2548 		else
2549 			te_name = strndup(p, slash - p);
2550 		if (te_name == NULL) {
2551 			err = got_error_from_errno("strndup");
2552 			break;
2553 		}
2554 		te = got_object_tree_find_entry(s->tree, te_name);
2555 		if (te == NULL) {
2556 			err = got_error_path(te_name, GOT_ERR_NO_TREE_ENTRY);
2557 			free(te_name);
2558 			break;
2559 		}
2560 		free(te_name);
2561 		s->first_displayed_entry = s->selected_entry = te;
2562 
2563 		if (!S_ISDIR(got_tree_entry_get_mode(s->selected_entry)))
2564 			break; /* jump to this file's entry */
2565 
2566 		slash = strchr(p, '/');
2567 		if (slash)
2568 			subpath = strndup(path, slash - path);
2569 		else
2570 			subpath = strdup(path);
2571 		if (subpath == NULL) {
2572 			err = got_error_from_errno("strdup");
2573 			break;
2574 		}
2575 
2576 		err = got_object_id_by_path(&tree_id, s->repo, commit,
2577 		    subpath);
2578 		if (err)
2579 			break;
2580 
2581 		err = got_object_open_as_tree(&tree, s->repo, tree_id);
2582 		free(tree_id);
2583 		if (err)
2584 			break;
2585 
2586 		err = tree_view_visit_subtree(s, tree);
2587 		if (err) {
2588 			got_object_tree_close(tree);
2589 			break;
2590 		}
2591 		if (slash == NULL)
2592 			break;
2593 		free(subpath);
2594 		subpath = NULL;
2595 		p = slash;
2596 	}
2597 
2598 	free(subpath);
2599 	return err;
2600 }
2601 
2602 static const struct got_error *
2603 browse_commit_tree(struct tog_view **new_view, int begin_y, int begin_x,
2604     struct commit_queue_entry *entry, const char *path,
2605     const char *head_ref_name, struct got_repository *repo)
2606 {
2607 	const struct got_error *err = NULL;
2608 	struct tog_tree_view_state *s;
2609 	struct tog_view *tree_view;
2610 
2611 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
2612 	if (tree_view == NULL)
2613 		return got_error_from_errno("view_open");
2614 
2615 	err = open_tree_view(tree_view, entry->id, head_ref_name, repo);
2616 	if (err)
2617 		return err;
2618 	s = &tree_view->state.tree;
2619 
2620 	*new_view = tree_view;
2621 
2622 	if (got_path_is_root_dir(path))
2623 		return NULL;
2624 
2625 	return tree_view_walk_path(s, entry->commit, path);
2626 }
2627 
2628 static const struct got_error *
2629 block_signals_used_by_main_thread(void)
2630 {
2631 	sigset_t sigset;
2632 	int errcode;
2633 
2634 	if (sigemptyset(&sigset) == -1)
2635 		return got_error_from_errno("sigemptyset");
2636 
2637 	/* tog handles SIGWINCH, SIGCONT, SIGINT, SIGTERM */
2638 	if (sigaddset(&sigset, SIGWINCH) == -1)
2639 		return got_error_from_errno("sigaddset");
2640 	if (sigaddset(&sigset, SIGCONT) == -1)
2641 		return got_error_from_errno("sigaddset");
2642 	if (sigaddset(&sigset, SIGINT) == -1)
2643 		return got_error_from_errno("sigaddset");
2644 	if (sigaddset(&sigset, SIGTERM) == -1)
2645 		return got_error_from_errno("sigaddset");
2646 
2647 	/* ncurses handles SIGTSTP */
2648 	if (sigaddset(&sigset, SIGTSTP) == -1)
2649 		return got_error_from_errno("sigaddset");
2650 
2651 	errcode = pthread_sigmask(SIG_BLOCK, &sigset, NULL);
2652 	if (errcode)
2653 		return got_error_set_errno(errcode, "pthread_sigmask");
2654 
2655 	return NULL;
2656 }
2657 
2658 static void *
2659 log_thread(void *arg)
2660 {
2661 	const struct got_error *err = NULL;
2662 	int errcode = 0;
2663 	struct tog_log_thread_args *a = arg;
2664 	int done = 0;
2665 
2666 	/*
2667 	 * Sync startup with main thread such that we begin our
2668 	 * work once view_input() has released the mutex.
2669 	 */
2670 	errcode = pthread_mutex_lock(&tog_mutex);
2671 	if (errcode) {
2672 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
2673 		return (void *)err;
2674 	}
2675 
2676 	err = block_signals_used_by_main_thread();
2677 	if (err) {
2678 		pthread_mutex_unlock(&tog_mutex);
2679 		goto done;
2680 	}
2681 
2682 	while (!done && !err && !tog_fatal_signal_received()) {
2683 		errcode = pthread_mutex_unlock(&tog_mutex);
2684 		if (errcode) {
2685 			err = got_error_set_errno(errcode,
2686 			    "pthread_mutex_unlock");
2687 			goto done;
2688 		}
2689 		err = queue_commits(a);
2690 		if (err) {
2691 			if (err->code != GOT_ERR_ITER_COMPLETED)
2692 				goto done;
2693 			err = NULL;
2694 			done = 1;
2695 		} else if (a->commits_needed > 0 && !a->load_all)
2696 			a->commits_needed--;
2697 
2698 		errcode = pthread_mutex_lock(&tog_mutex);
2699 		if (errcode) {
2700 			err = got_error_set_errno(errcode,
2701 			    "pthread_mutex_lock");
2702 			goto done;
2703 		} else if (*a->quit)
2704 			done = 1;
2705 		else if (*a->first_displayed_entry == NULL) {
2706 			*a->first_displayed_entry =
2707 			    TAILQ_FIRST(&a->commits->head);
2708 			*a->selected_entry = *a->first_displayed_entry;
2709 		}
2710 
2711 		errcode = pthread_cond_signal(&a->commit_loaded);
2712 		if (errcode) {
2713 			err = got_error_set_errno(errcode,
2714 			    "pthread_cond_signal");
2715 			pthread_mutex_unlock(&tog_mutex);
2716 			goto done;
2717 		}
2718 
2719 		if (done)
2720 			a->commits_needed = 0;
2721 		else {
2722 			if (a->commits_needed == 0 && !a->load_all) {
2723 				errcode = pthread_cond_wait(&a->need_commits,
2724 				    &tog_mutex);
2725 				if (errcode) {
2726 					err = got_error_set_errno(errcode,
2727 					    "pthread_cond_wait");
2728 					pthread_mutex_unlock(&tog_mutex);
2729 					goto done;
2730 				}
2731 				if (*a->quit)
2732 					done = 1;
2733 			}
2734 		}
2735 	}
2736 	a->log_complete = 1;
2737 	errcode = pthread_mutex_unlock(&tog_mutex);
2738 	if (errcode)
2739 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
2740 done:
2741 	if (err) {
2742 		tog_thread_error = 1;
2743 		pthread_cond_signal(&a->commit_loaded);
2744 	}
2745 	return (void *)err;
2746 }
2747 
2748 static const struct got_error *
2749 stop_log_thread(struct tog_log_view_state *s)
2750 {
2751 	const struct got_error *err = NULL, *thread_err = NULL;
2752 	int errcode;
2753 
2754 	if (s->thread) {
2755 		s->quit = 1;
2756 		errcode = pthread_cond_signal(&s->thread_args.need_commits);
2757 		if (errcode)
2758 			return got_error_set_errno(errcode,
2759 			    "pthread_cond_signal");
2760 		errcode = pthread_mutex_unlock(&tog_mutex);
2761 		if (errcode)
2762 			return got_error_set_errno(errcode,
2763 			    "pthread_mutex_unlock");
2764 		errcode = pthread_join(s->thread, (void **)&thread_err);
2765 		if (errcode)
2766 			return got_error_set_errno(errcode, "pthread_join");
2767 		errcode = pthread_mutex_lock(&tog_mutex);
2768 		if (errcode)
2769 			return got_error_set_errno(errcode,
2770 			    "pthread_mutex_lock");
2771 		s->thread = 0; //NULL;
2772 	}
2773 
2774 	if (s->thread_args.repo) {
2775 		err = got_repo_close(s->thread_args.repo);
2776 		s->thread_args.repo = NULL;
2777 	}
2778 
2779 	if (s->thread_args.pack_fds) {
2780 		const struct got_error *pack_err =
2781 		    got_repo_pack_fds_close(s->thread_args.pack_fds);
2782 		if (err == NULL)
2783 			err = pack_err;
2784 		s->thread_args.pack_fds = NULL;
2785 	}
2786 
2787 	if (s->thread_args.graph) {
2788 		got_commit_graph_close(s->thread_args.graph);
2789 		s->thread_args.graph = NULL;
2790 	}
2791 
2792 	return err ? err : thread_err;
2793 }
2794 
2795 static const struct got_error *
2796 close_log_view(struct tog_view *view)
2797 {
2798 	const struct got_error *err = NULL;
2799 	struct tog_log_view_state *s = &view->state.log;
2800 	int errcode;
2801 
2802 	err = stop_log_thread(s);
2803 
2804 	errcode = pthread_cond_destroy(&s->thread_args.need_commits);
2805 	if (errcode && err == NULL)
2806 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2807 
2808 	errcode = pthread_cond_destroy(&s->thread_args.commit_loaded);
2809 	if (errcode && err == NULL)
2810 		err = got_error_set_errno(errcode, "pthread_cond_destroy");
2811 
2812 	free_commits(&s->commits);
2813 	free(s->in_repo_path);
2814 	s->in_repo_path = NULL;
2815 	free(s->start_id);
2816 	s->start_id = NULL;
2817 	free(s->head_ref_name);
2818 	s->head_ref_name = NULL;
2819 	return err;
2820 }
2821 
2822 static const struct got_error *
2823 search_start_log_view(struct tog_view *view)
2824 {
2825 	struct tog_log_view_state *s = &view->state.log;
2826 
2827 	s->matched_entry = NULL;
2828 	s->search_entry = NULL;
2829 	return NULL;
2830 }
2831 
2832 static const struct got_error *
2833 search_next_log_view(struct tog_view *view)
2834 {
2835 	const struct got_error *err = NULL;
2836 	struct tog_log_view_state *s = &view->state.log;
2837 	struct commit_queue_entry *entry;
2838 
2839 	/* Display progress update in log view. */
2840 	show_log_view(view);
2841 	update_panels();
2842 	doupdate();
2843 
2844 	if (s->search_entry) {
2845 		int errcode, ch;
2846 		errcode = pthread_mutex_unlock(&tog_mutex);
2847 		if (errcode)
2848 			return got_error_set_errno(errcode,
2849 			    "pthread_mutex_unlock");
2850 		ch = wgetch(view->window);
2851 		errcode = pthread_mutex_lock(&tog_mutex);
2852 		if (errcode)
2853 			return got_error_set_errno(errcode,
2854 			    "pthread_mutex_lock");
2855 		if (ch == CTRL('g') || ch == KEY_BACKSPACE) {
2856 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2857 			return NULL;
2858 		}
2859 		if (view->searching == TOG_SEARCH_FORWARD)
2860 			entry = TAILQ_NEXT(s->search_entry, entry);
2861 		else
2862 			entry = TAILQ_PREV(s->search_entry,
2863 			    commit_queue_head, entry);
2864 	} else if (s->matched_entry) {
2865 		int matched_idx = s->matched_entry->idx;
2866 		int selected_idx = s->selected_entry->idx;
2867 
2868 		/*
2869 		 * If the user has moved the cursor after we hit a match,
2870 		 * the position from where we should continue searching
2871 		 * might have changed.
2872 		 */
2873 		if (view->searching == TOG_SEARCH_FORWARD) {
2874 			if (matched_idx > selected_idx)
2875 				entry = TAILQ_NEXT(s->selected_entry, entry);
2876 			else
2877 				entry = TAILQ_NEXT(s->matched_entry, entry);
2878 		} else {
2879 			if (matched_idx < selected_idx)
2880 				entry = TAILQ_PREV(s->selected_entry,
2881 						commit_queue_head, entry);
2882 			else
2883 				entry = TAILQ_PREV(s->matched_entry,
2884 						commit_queue_head, entry);
2885 		}
2886 	} else {
2887 		entry = s->selected_entry;
2888 	}
2889 
2890 	while (1) {
2891 		int have_match = 0;
2892 
2893 		if (entry == NULL) {
2894 			if (s->thread_args.log_complete ||
2895 			    view->searching == TOG_SEARCH_BACKWARD) {
2896 				view->search_next_done =
2897 				    (s->matched_entry == NULL ?
2898 				    TOG_SEARCH_HAVE_NONE : TOG_SEARCH_NO_MORE);
2899 				s->search_entry = NULL;
2900 				return NULL;
2901 			}
2902 			/*
2903 			 * Poke the log thread for more commits and return,
2904 			 * allowing the main loop to make progress. Search
2905 			 * will resume at s->search_entry once we come back.
2906 			 */
2907 			s->thread_args.commits_needed++;
2908 			return trigger_log_thread(view, 0);
2909 		}
2910 
2911 		err = match_commit(&have_match, entry->id, entry->commit,
2912 		    &view->regex);
2913 		if (err)
2914 			break;
2915 		if (have_match) {
2916 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
2917 			s->matched_entry = entry;
2918 			break;
2919 		}
2920 
2921 		s->search_entry = entry;
2922 		if (view->searching == TOG_SEARCH_FORWARD)
2923 			entry = TAILQ_NEXT(entry, entry);
2924 		else
2925 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
2926 	}
2927 
2928 	if (s->matched_entry) {
2929 		int cur = s->selected_entry->idx;
2930 		while (cur < s->matched_entry->idx) {
2931 			err = input_log_view(NULL, view, KEY_DOWN);
2932 			if (err)
2933 				return err;
2934 			cur++;
2935 		}
2936 		while (cur > s->matched_entry->idx) {
2937 			err = input_log_view(NULL, view, KEY_UP);
2938 			if (err)
2939 				return err;
2940 			cur--;
2941 		}
2942 	}
2943 
2944 	s->search_entry = NULL;
2945 
2946 	return NULL;
2947 }
2948 
2949 static const struct got_error *
2950 open_log_view(struct tog_view *view, struct got_object_id *start_id,
2951     struct got_repository *repo, const char *head_ref_name,
2952     const char *in_repo_path, int log_branches)
2953 {
2954 	const struct got_error *err = NULL;
2955 	struct tog_log_view_state *s = &view->state.log;
2956 	struct got_repository *thread_repo = NULL;
2957 	struct got_commit_graph *thread_graph = NULL;
2958 	int errcode;
2959 
2960 	if (in_repo_path != s->in_repo_path) {
2961 		free(s->in_repo_path);
2962 		s->in_repo_path = strdup(in_repo_path);
2963 		if (s->in_repo_path == NULL)
2964 			return got_error_from_errno("strdup");
2965 	}
2966 
2967 	/* The commit queue only contains commits being displayed. */
2968 	TAILQ_INIT(&s->commits.head);
2969 	s->commits.ncommits = 0;
2970 
2971 	s->repo = repo;
2972 	if (head_ref_name) {
2973 		s->head_ref_name = strdup(head_ref_name);
2974 		if (s->head_ref_name == NULL) {
2975 			err = got_error_from_errno("strdup");
2976 			goto done;
2977 		}
2978 	}
2979 	s->start_id = got_object_id_dup(start_id);
2980 	if (s->start_id == NULL) {
2981 		err = got_error_from_errno("got_object_id_dup");
2982 		goto done;
2983 	}
2984 	s->log_branches = log_branches;
2985 
2986 	STAILQ_INIT(&s->colors);
2987 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
2988 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
2989 		    get_color_value("TOG_COLOR_COMMIT"));
2990 		if (err)
2991 			goto done;
2992 		err = add_color(&s->colors, "^$", TOG_COLOR_AUTHOR,
2993 		    get_color_value("TOG_COLOR_AUTHOR"));
2994 		if (err) {
2995 			free_colors(&s->colors);
2996 			goto done;
2997 		}
2998 		err = add_color(&s->colors, "^$", TOG_COLOR_DATE,
2999 		    get_color_value("TOG_COLOR_DATE"));
3000 		if (err) {
3001 			free_colors(&s->colors);
3002 			goto done;
3003 		}
3004 	}
3005 
3006 	view->show = show_log_view;
3007 	view->input = input_log_view;
3008 	view->resize = resize_log_view;
3009 	view->close = close_log_view;
3010 	view->search_start = search_start_log_view;
3011 	view->search_next = search_next_log_view;
3012 
3013 	if (s->thread_args.pack_fds == NULL) {
3014 		err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3015 		if (err)
3016 			goto done;
3017 	}
3018 	err = got_repo_open(&thread_repo, got_repo_get_path(repo), NULL,
3019 	    s->thread_args.pack_fds);
3020 	if (err)
3021 		goto done;
3022 	err = got_commit_graph_open(&thread_graph, s->in_repo_path,
3023 	    !s->log_branches);
3024 	if (err)
3025 		goto done;
3026 	err = got_commit_graph_iter_start(thread_graph, s->start_id,
3027 	    s->repo, NULL, NULL);
3028 	if (err)
3029 		goto done;
3030 
3031 	errcode = pthread_cond_init(&s->thread_args.need_commits, NULL);
3032 	if (errcode) {
3033 		err = got_error_set_errno(errcode, "pthread_cond_init");
3034 		goto done;
3035 	}
3036 	errcode = pthread_cond_init(&s->thread_args.commit_loaded, NULL);
3037 	if (errcode) {
3038 		err = got_error_set_errno(errcode, "pthread_cond_init");
3039 		goto done;
3040 	}
3041 
3042 	s->thread_args.commits_needed = view->nlines;
3043 	s->thread_args.graph = thread_graph;
3044 	s->thread_args.commits = &s->commits;
3045 	s->thread_args.in_repo_path = s->in_repo_path;
3046 	s->thread_args.start_id = s->start_id;
3047 	s->thread_args.repo = thread_repo;
3048 	s->thread_args.log_complete = 0;
3049 	s->thread_args.quit = &s->quit;
3050 	s->thread_args.first_displayed_entry = &s->first_displayed_entry;
3051 	s->thread_args.selected_entry = &s->selected_entry;
3052 	s->thread_args.searching = &view->searching;
3053 	s->thread_args.search_next_done = &view->search_next_done;
3054 	s->thread_args.regex = &view->regex;
3055 done:
3056 	if (err)
3057 		close_log_view(view);
3058 	return err;
3059 }
3060 
3061 static const struct got_error *
3062 show_log_view(struct tog_view *view)
3063 {
3064 	const struct got_error *err;
3065 	struct tog_log_view_state *s = &view->state.log;
3066 
3067 	if (s->thread == 0) { //NULL) {
3068 		int errcode = pthread_create(&s->thread, NULL, log_thread,
3069 		    &s->thread_args);
3070 		if (errcode)
3071 			return got_error_set_errno(errcode, "pthread_create");
3072 		if (s->thread_args.commits_needed > 0) {
3073 			err = trigger_log_thread(view, 1);
3074 			if (err)
3075 				return err;
3076 		}
3077 	}
3078 
3079 	return draw_commits(view);
3080 }
3081 
3082 static void
3083 log_move_cursor_up(struct tog_view *view, int page, int home)
3084 {
3085 	struct tog_log_view_state *s = &view->state.log;
3086 
3087 	if (s->selected_entry->idx == 0)
3088 		view->count = 0;
3089 	if (s->first_displayed_entry == NULL)
3090 		return;
3091 
3092 	if ((page && TAILQ_FIRST(&s->commits.head) == s->first_displayed_entry)
3093 	    || home)
3094 		s->selected = home ? 0 : MAX(0, s->selected - page - 1);
3095 
3096 	if (!page && !home && s->selected > 0)
3097 		--s->selected;
3098 	else
3099 		log_scroll_up(s, home ? s->commits.ncommits : MAX(page, 1));
3100 
3101 	select_commit(s);
3102 	return;
3103 }
3104 
3105 static const struct got_error *
3106 log_move_cursor_down(struct tog_view *view, int page)
3107 {
3108 	struct tog_log_view_state	*s = &view->state.log;
3109 	struct commit_queue_entry	*first;
3110 	const struct got_error		*err = NULL;
3111 
3112 	first = s->first_displayed_entry;
3113 	if (first == NULL) {
3114 		view->count = 0;
3115 		return NULL;
3116 	}
3117 
3118 	if (s->thread_args.log_complete &&
3119 	    s->selected_entry->idx >= s->commits.ncommits - 1)
3120 		return NULL;
3121 
3122 	if (!page) {
3123 		int eos = view->nlines - 2;
3124 
3125 		if (view_is_hsplit_top(view))
3126 			--eos;  /* border consumes the last line */
3127 		if (s->selected < MIN(eos, s->commits.ncommits - 1))
3128 			++s->selected;
3129 		else
3130 			err = log_scroll_down(view, 1);
3131 	} else if (s->thread_args.load_all) {
3132 		if (s->last_displayed_entry->idx == s->commits.ncommits - 1)
3133 			s->selected += MIN(s->last_displayed_entry->idx -
3134 			    s->selected_entry->idx, page + 1);
3135 		else
3136 			err = log_scroll_down(view, MIN(page,
3137 			    s->commits.ncommits - s->selected_entry->idx - 1));
3138 		s->selected = MIN(view->nlines - 2, s->commits.ncommits - 1);
3139 	} else {
3140 		err = log_scroll_down(view, page);
3141 		if (err)
3142 			return err;
3143 		if (first == s->first_displayed_entry && s->selected <
3144 		    MIN(view->nlines - 2, s->commits.ncommits - 1)) {
3145 			s->selected = MIN(s->commits.ncommits - 1, page);
3146 		}
3147 	}
3148 	if (err)
3149 		return err;
3150 
3151 	/*
3152 	 * We might necessarily overshoot in horizontal
3153 	 * splits; if so, select the last displayed commit.
3154 	 */
3155 	s->selected = MIN(s->selected,
3156 	    s->last_displayed_entry->idx - s->first_displayed_entry->idx);
3157 
3158 	select_commit(s);
3159 
3160 	if (s->thread_args.log_complete &&
3161 	    s->selected_entry->idx == s->commits.ncommits - 1)
3162 		view->count = 0;
3163 
3164 	return NULL;
3165 }
3166 
3167 static void
3168 view_get_split(struct tog_view *view, int *y, int *x)
3169 {
3170 	*x = 0;
3171 	*y = 0;
3172 
3173 	if (view->mode == TOG_VIEW_SPLIT_HRZN) {
3174 		if (view->child && view->child->resized_y)
3175 			*y = view->child->resized_y;
3176 		else if (view->resized_y)
3177 			*y = view->resized_y;
3178 		else
3179 			*y = view_split_begin_y(view->lines);
3180 	} else if (view->mode == TOG_VIEW_SPLIT_VERT) {
3181 		if (view->child && view->child->resized_x)
3182 			*x = view->child->resized_x;
3183 		else if (view->resized_x)
3184 			*x = view->resized_x;
3185 		else
3186 			*x = view_split_begin_x(view->begin_x);
3187 	}
3188 }
3189 
3190 /* Split view horizontally at y and offset view->state->selected line. */
3191 static const struct got_error *
3192 view_init_hsplit(struct tog_view *view, int y)
3193 {
3194 	const struct got_error *err = NULL;
3195 
3196 	view->nlines = y;
3197 	view->ncols = COLS;
3198 	err = view_resize(view);
3199 	if (err)
3200 		return err;
3201 
3202 	err = offset_selection_down(view);
3203 
3204 	return err;
3205 }
3206 
3207 static const struct got_error *
3208 input_log_view(struct tog_view **new_view, struct tog_view *view, int ch)
3209 {
3210 	const struct got_error *err = NULL;
3211 	struct tog_log_view_state *s = &view->state.log;
3212 	struct tog_view *diff_view = NULL, *tree_view = NULL;
3213 	struct tog_view *ref_view = NULL;
3214 	struct commit_queue_entry *entry;
3215 	int begin_x = 0, begin_y = 0, eos, n, nscroll;
3216 
3217 	if (s->thread_args.load_all) {
3218 		if (ch == CTRL('g') || ch == KEY_BACKSPACE)
3219 			s->thread_args.load_all = 0;
3220 		else if (s->thread_args.log_complete) {
3221 			err = log_move_cursor_down(view, s->commits.ncommits);
3222 			s->thread_args.load_all = 0;
3223 		}
3224 		return err;
3225 	}
3226 
3227 	eos = nscroll = view->nlines - 1;
3228 	if (view_is_hsplit_top(view))
3229 		--eos;  /* border */
3230 
3231 	switch (ch) {
3232 	case 'q':
3233 		s->quit = 1;
3234 		break;
3235 	case '0':
3236 		view->x = 0;
3237 		break;
3238 	case '$':
3239 		view->x = MAX(view->maxx - view->ncols / 2, 0);
3240 		view->count = 0;
3241 		break;
3242 	case KEY_RIGHT:
3243 	case 'l':
3244 		if (view->x + view->ncols / 2 < view->maxx)
3245 			view->x += 2;  /* move two columns right */
3246 		else
3247 			view->count = 0;
3248 		break;
3249 	case KEY_LEFT:
3250 	case 'h':
3251 		view->x -= MIN(view->x, 2);  /* move two columns back */
3252 		if (view->x <= 0)
3253 			view->count = 0;
3254 		break;
3255 	case 'k':
3256 	case KEY_UP:
3257 	case '<':
3258 	case ',':
3259 	case CTRL('p'):
3260 		log_move_cursor_up(view, 0, 0);
3261 		break;
3262 	case 'g':
3263 	case KEY_HOME:
3264 		log_move_cursor_up(view, 0, 1);
3265 		view->count = 0;
3266 		break;
3267 	case CTRL('u'):
3268 	case 'u':
3269 		nscroll /= 2;
3270 		/* FALL THROUGH */
3271 	case KEY_PPAGE:
3272 	case CTRL('b'):
3273 	case 'b':
3274 		log_move_cursor_up(view, nscroll, 0);
3275 		break;
3276 	case 'j':
3277 	case KEY_DOWN:
3278 	case '>':
3279 	case '.':
3280 	case CTRL('n'):
3281 		err = log_move_cursor_down(view, 0);
3282 		break;
3283 	case '@':
3284 		s->use_committer = !s->use_committer;
3285 		break;
3286 	case 'G':
3287 	case KEY_END: {
3288 		/* We don't know yet how many commits, so we're forced to
3289 		 * traverse them all. */
3290 		view->count = 0;
3291 		if (!s->thread_args.log_complete) {
3292 			s->thread_args.load_all = 1;
3293 			return trigger_log_thread(view, 0);
3294 		}
3295 
3296 		s->selected = 0;
3297 		entry = TAILQ_LAST(&s->commits.head, commit_queue_head);
3298 		for (n = 0; n < eos; n++) {
3299 			if (entry == NULL)
3300 				break;
3301 			s->first_displayed_entry = entry;
3302 			entry = TAILQ_PREV(entry, commit_queue_head, entry);
3303 		}
3304 		if (n > 0)
3305 			s->selected = n - 1;
3306 		select_commit(s);
3307 		break;
3308 	}
3309 	case CTRL('d'):
3310 	case 'd':
3311 		nscroll /= 2;
3312 		/* FALL THROUGH */
3313 	case KEY_NPAGE:
3314 	case CTRL('f'):
3315 	case 'f':
3316 	case ' ':
3317 		err = log_move_cursor_down(view, nscroll);
3318 		break;
3319 	case KEY_RESIZE:
3320 		if (s->selected > view->nlines - 2)
3321 			s->selected = view->nlines - 2;
3322 		if (s->selected > s->commits.ncommits - 1)
3323 			s->selected = s->commits.ncommits - 1;
3324 		select_commit(s);
3325 		if (s->commits.ncommits < view->nlines - 1 &&
3326 		    !s->thread_args.log_complete) {
3327 			s->thread_args.commits_needed += (view->nlines - 1) -
3328 			    s->commits.ncommits;
3329 			err = trigger_log_thread(view, 1);
3330 		}
3331 		break;
3332 	case KEY_ENTER:
3333 	case '\r':
3334 		view->count = 0;
3335 		if (s->selected_entry == NULL)
3336 			break;
3337 
3338 		/* get dimensions--don't split till initialisation succeeds */
3339 		if (view_is_parent_view(view))
3340 			view_get_split(view, &begin_y, &begin_x);
3341 
3342 		err = open_diff_view_for_commit(&diff_view, begin_y, begin_x,
3343 		    s->selected_entry->commit, s->selected_entry->id,
3344 		    view, s->repo);
3345 		if (err)
3346 			break;
3347 
3348 		if (view_is_parent_view(view) &&
3349 		    view->mode == TOG_VIEW_SPLIT_HRZN) {  /* safe to split */
3350 			err = view_init_hsplit(view, begin_y);
3351 			if (err)
3352 				break;
3353 		}
3354 
3355 		view->focussed = 0;
3356 		diff_view->focussed = 1;
3357 		diff_view->mode = view->mode;
3358 		diff_view->nlines = view->lines - begin_y;
3359 
3360 		if (view_is_parent_view(view)) {
3361 			view_transfer_size(diff_view, view);
3362 			err = view_close_child(view);
3363 			if (err)
3364 				return err;
3365 			err = view_set_child(view, diff_view);
3366 			if (err)
3367 				return err;
3368 			view->focus_child = 1;
3369 		} else
3370 			*new_view = diff_view;
3371 		break;
3372 	case 't':
3373 		view->count = 0;
3374 		if (s->selected_entry == NULL)
3375 			break;
3376 		if (view_is_parent_view(view))
3377 			view_get_split(view, &begin_y, &begin_x);
3378 		err = browse_commit_tree(&tree_view, begin_y, begin_x,
3379 		    s->selected_entry, s->in_repo_path, s->head_ref_name,
3380 		    s->repo);
3381 		if (err)
3382 			break;
3383 		if (view_is_parent_view(view) &&
3384 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
3385 			err = view_init_hsplit(view, begin_y);
3386 			if (err)
3387 				break;
3388 		}
3389 		view->focussed = 0;
3390 		tree_view->focussed = 1;
3391 		tree_view->mode = view->mode;
3392 		tree_view->nlines = view->lines - begin_y;
3393 		if (view_is_parent_view(view)) {
3394 			view_transfer_size(tree_view, view);
3395 			err = view_close_child(view);
3396 			if (err)
3397 				return err;
3398 			err = view_set_child(view, tree_view);
3399 			if (err)
3400 				return err;
3401 			view->focus_child = 1;
3402 		} else
3403 			*new_view = tree_view;
3404 		break;
3405 	case KEY_BACKSPACE:
3406 	case CTRL('l'):
3407 	case 'B':
3408 		view->count = 0;
3409 		if (ch == KEY_BACKSPACE &&
3410 		    got_path_is_root_dir(s->in_repo_path))
3411 			break;
3412 		err = stop_log_thread(s);
3413 		if (err)
3414 			return err;
3415 		if (ch == KEY_BACKSPACE) {
3416 			char *parent_path;
3417 			err = got_path_dirname(&parent_path, s->in_repo_path);
3418 			if (err)
3419 				return err;
3420 			free(s->in_repo_path);
3421 			s->in_repo_path = parent_path;
3422 			s->thread_args.in_repo_path = s->in_repo_path;
3423 		} else if (ch == CTRL('l')) {
3424 			struct got_object_id *start_id;
3425 			err = got_repo_match_object_id(&start_id, NULL,
3426 			    s->head_ref_name ? s->head_ref_name : GOT_REF_HEAD,
3427 			    GOT_OBJ_TYPE_COMMIT, &tog_refs, s->repo);
3428 			if (err)
3429 				return err;
3430 			free(s->start_id);
3431 			s->start_id = start_id;
3432 			s->thread_args.start_id = s->start_id;
3433 		} else /* 'B' */
3434 			s->log_branches = !s->log_branches;
3435 
3436 		if (s->thread_args.pack_fds == NULL) {
3437 			err = got_repo_pack_fds_open(&s->thread_args.pack_fds);
3438 			if (err)
3439 				return err;
3440 		}
3441 		err = got_repo_open(&s->thread_args.repo,
3442 		    got_repo_get_path(s->repo), NULL,
3443 		    s->thread_args.pack_fds);
3444 		if (err)
3445 			return err;
3446 		tog_free_refs();
3447 		err = tog_load_refs(s->repo, 0);
3448 		if (err)
3449 			return err;
3450 		err = got_commit_graph_open(&s->thread_args.graph,
3451 		    s->in_repo_path, !s->log_branches);
3452 		if (err)
3453 			return err;
3454 		err = got_commit_graph_iter_start(s->thread_args.graph,
3455 		    s->start_id, s->repo, NULL, NULL);
3456 		if (err)
3457 			return err;
3458 		free_commits(&s->commits);
3459 		s->first_displayed_entry = NULL;
3460 		s->last_displayed_entry = NULL;
3461 		s->selected_entry = NULL;
3462 		s->selected = 0;
3463 		s->thread_args.log_complete = 0;
3464 		s->quit = 0;
3465 		s->thread_args.commits_needed = view->lines;
3466 		s->matched_entry = NULL;
3467 		s->search_entry = NULL;
3468 		break;
3469 	case 'r':
3470 		view->count = 0;
3471 		if (view_is_parent_view(view))
3472 			view_get_split(view, &begin_y, &begin_x);
3473 		ref_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_REF);
3474 		if (ref_view == NULL)
3475 			return got_error_from_errno("view_open");
3476 		err = open_ref_view(ref_view, s->repo);
3477 		if (err) {
3478 			view_close(ref_view);
3479 			return err;
3480 		}
3481 		if (view_is_parent_view(view) &&
3482 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
3483 			err = view_init_hsplit(view, begin_y);
3484 			if (err)
3485 				break;
3486 		}
3487 		view->focussed = 0;
3488 		ref_view->focussed = 1;
3489 		ref_view->mode = view->mode;
3490 		ref_view->nlines = view->lines - begin_y;
3491 		if (view_is_parent_view(view)) {
3492 			view_transfer_size(ref_view, view);
3493 			err = view_close_child(view);
3494 			if (err)
3495 				return err;
3496 			err = view_set_child(view, ref_view);
3497 			if (err)
3498 				return err;
3499 			view->focus_child = 1;
3500 		} else
3501 			*new_view = ref_view;
3502 		break;
3503 	default:
3504 		view->count = 0;
3505 		break;
3506 	}
3507 
3508 	return err;
3509 }
3510 
3511 static const struct got_error *
3512 apply_unveil(const char *repo_path, const char *worktree_path)
3513 {
3514 	const struct got_error *error;
3515 
3516 #ifdef PROFILE
3517 	if (unveil("gmon.out", "rwc") != 0)
3518 		return got_error_from_errno2("unveil", "gmon.out");
3519 #endif
3520 	if (repo_path && unveil(repo_path, "r") != 0)
3521 		return got_error_from_errno2("unveil", repo_path);
3522 
3523 	if (worktree_path && unveil(worktree_path, "rwc") != 0)
3524 		return got_error_from_errno2("unveil", worktree_path);
3525 
3526 	if (unveil(GOT_TMPDIR_STR, "rwc") != 0)
3527 		return got_error_from_errno2("unveil", GOT_TMPDIR_STR);
3528 
3529 	error = got_privsep_unveil_exec_helpers();
3530 	if (error != NULL)
3531 		return error;
3532 
3533 	if (unveil(NULL, NULL) != 0)
3534 		return got_error_from_errno("unveil");
3535 
3536 	return NULL;
3537 }
3538 
3539 static void
3540 init_curses(void)
3541 {
3542 	/*
3543 	 * Override default signal handlers before starting ncurses.
3544 	 * This should prevent ncurses from installing its own
3545 	 * broken cleanup() signal handler.
3546 	 */
3547 	signal(SIGWINCH, tog_sigwinch);
3548 	signal(SIGPIPE, tog_sigpipe);
3549 	signal(SIGCONT, tog_sigcont);
3550 	signal(SIGINT, tog_sigint);
3551 	signal(SIGTERM, tog_sigterm);
3552 
3553 	initscr();
3554 	cbreak();
3555 	halfdelay(1); /* Do fast refresh while initial view is loading. */
3556 	noecho();
3557 	nonl();
3558 	intrflush(stdscr, FALSE);
3559 	keypad(stdscr, TRUE);
3560 	curs_set(0);
3561 	if (getenv("TOG_COLORS") != NULL) {
3562 		start_color();
3563 		use_default_colors();
3564 	}
3565 }
3566 
3567 static const struct got_error *
3568 get_in_repo_path_from_argv0(char **in_repo_path, int argc, char *argv[],
3569     struct got_repository *repo, struct got_worktree *worktree)
3570 {
3571 	const struct got_error *err = NULL;
3572 
3573 	if (argc == 0) {
3574 		*in_repo_path = strdup("/");
3575 		if (*in_repo_path == NULL)
3576 			return got_error_from_errno("strdup");
3577 		return NULL;
3578 	}
3579 
3580 	if (worktree) {
3581 		const char *prefix = got_worktree_get_path_prefix(worktree);
3582 		char *p;
3583 
3584 		err = got_worktree_resolve_path(&p, worktree, argv[0]);
3585 		if (err)
3586 			return err;
3587 		if (asprintf(in_repo_path, "%s%s%s", prefix,
3588 		    (p[0] != '\0' && !got_path_is_root_dir(prefix)) ? "/" : "",
3589 		    p) == -1) {
3590 			err = got_error_from_errno("asprintf");
3591 			*in_repo_path = NULL;
3592 		}
3593 		free(p);
3594 	} else
3595 		err = got_repo_map_path(in_repo_path, repo, argv[0]);
3596 
3597 	return err;
3598 }
3599 
3600 static const struct got_error *
3601 cmd_log(int argc, char *argv[])
3602 {
3603 	const struct got_error *error;
3604 	struct got_repository *repo = NULL;
3605 	struct got_worktree *worktree = NULL;
3606 	struct got_object_id *start_id = NULL;
3607 	char *in_repo_path = NULL, *repo_path = NULL, *cwd = NULL;
3608 	char *start_commit = NULL, *label = NULL;
3609 	struct got_reference *ref = NULL;
3610 	const char *head_ref_name = NULL;
3611 	int ch, log_branches = 0;
3612 	struct tog_view *view;
3613 	int *pack_fds = NULL;
3614 
3615 	while ((ch = getopt(argc, argv, "bc:r:")) != -1) {
3616 		switch (ch) {
3617 		case 'b':
3618 			log_branches = 1;
3619 			break;
3620 		case 'c':
3621 			start_commit = optarg;
3622 			break;
3623 		case 'r':
3624 			repo_path = realpath(optarg, NULL);
3625 			if (repo_path == NULL)
3626 				return got_error_from_errno2("realpath",
3627 				    optarg);
3628 			break;
3629 		default:
3630 			usage_log();
3631 			/* NOTREACHED */
3632 		}
3633 	}
3634 
3635 	argc -= optind;
3636 	argv += optind;
3637 
3638 	if (argc > 1)
3639 		usage_log();
3640 
3641 	error = got_repo_pack_fds_open(&pack_fds);
3642 	if (error != NULL)
3643 		goto done;
3644 
3645 	if (repo_path == NULL) {
3646 		cwd = getcwd(NULL, 0);
3647 		if (cwd == NULL)
3648 			return got_error_from_errno("getcwd");
3649 		error = got_worktree_open(&worktree, cwd);
3650 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
3651 			goto done;
3652 		if (worktree)
3653 			repo_path =
3654 			    strdup(got_worktree_get_repo_path(worktree));
3655 		else
3656 			repo_path = strdup(cwd);
3657 		if (repo_path == NULL) {
3658 			error = got_error_from_errno("strdup");
3659 			goto done;
3660 		}
3661 	}
3662 
3663 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
3664 	if (error != NULL)
3665 		goto done;
3666 
3667 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
3668 	    repo, worktree);
3669 	if (error)
3670 		goto done;
3671 
3672 	init_curses();
3673 
3674 	error = apply_unveil(got_repo_get_path(repo),
3675 	    worktree ? got_worktree_get_root_path(worktree) : NULL);
3676 	if (error)
3677 		goto done;
3678 
3679 	/* already loaded by tog_log_with_path()? */
3680 	if (TAILQ_EMPTY(&tog_refs)) {
3681 		error = tog_load_refs(repo, 0);
3682 		if (error)
3683 			goto done;
3684 	}
3685 
3686 	if (start_commit == NULL) {
3687 		error = got_repo_match_object_id(&start_id, &label,
3688 		    worktree ? got_worktree_get_head_ref_name(worktree) :
3689 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3690 		if (error)
3691 			goto done;
3692 		head_ref_name = label;
3693 	} else {
3694 		error = got_ref_open(&ref, repo, start_commit, 0);
3695 		if (error == NULL)
3696 			head_ref_name = got_ref_get_name(ref);
3697 		else if (error->code != GOT_ERR_NOT_REF)
3698 			goto done;
3699 		error = got_repo_match_object_id(&start_id, NULL,
3700 		    start_commit, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
3701 		if (error)
3702 			goto done;
3703 	}
3704 
3705 	view = view_open(0, 0, 0, 0, TOG_VIEW_LOG);
3706 	if (view == NULL) {
3707 		error = got_error_from_errno("view_open");
3708 		goto done;
3709 	}
3710 	error = open_log_view(view, start_id, repo, head_ref_name,
3711 	    in_repo_path, log_branches);
3712 	if (error)
3713 		goto done;
3714 	if (worktree) {
3715 		/* Release work tree lock. */
3716 		got_worktree_close(worktree);
3717 		worktree = NULL;
3718 	}
3719 	error = view_loop(view);
3720 done:
3721 	free(in_repo_path);
3722 	free(repo_path);
3723 	free(cwd);
3724 	free(start_id);
3725 	free(label);
3726 	if (ref)
3727 		got_ref_close(ref);
3728 	if (repo) {
3729 		const struct got_error *close_err = got_repo_close(repo);
3730 		if (error == NULL)
3731 			error = close_err;
3732 	}
3733 	if (worktree)
3734 		got_worktree_close(worktree);
3735 	if (pack_fds) {
3736 		const struct got_error *pack_err =
3737 		    got_repo_pack_fds_close(pack_fds);
3738 		if (error == NULL)
3739 			error = pack_err;
3740 	}
3741 	tog_free_refs();
3742 	return error;
3743 }
3744 
3745 __dead static void
3746 usage_diff(void)
3747 {
3748 	endwin();
3749 	fprintf(stderr, "usage: %s diff [-a] [-C number] [-r repository-path] "
3750 	    "[-w] object1 object2\n", getprogname());
3751 	exit(1);
3752 }
3753 
3754 static int
3755 match_line(const char *line, regex_t *regex, size_t nmatch,
3756     regmatch_t *regmatch)
3757 {
3758 	return regexec(regex, line, nmatch, regmatch, 0) == 0;
3759 }
3760 
3761 static struct tog_color *
3762 match_color(struct tog_colors *colors, const char *line)
3763 {
3764 	struct tog_color *tc = NULL;
3765 
3766 	STAILQ_FOREACH(tc, colors, entry) {
3767 		if (match_line(line, &tc->regex, 0, NULL))
3768 			return tc;
3769 	}
3770 
3771 	return NULL;
3772 }
3773 
3774 static const struct got_error *
3775 add_matched_line(int *wtotal, const char *line, int wlimit, int col_tab_align,
3776     WINDOW *window, int skipcol, regmatch_t *regmatch)
3777 {
3778 	const struct got_error *err = NULL;
3779 	char *exstr = NULL;
3780 	wchar_t *wline = NULL;
3781 	int rme, rms, n, width, scrollx;
3782 	int width0 = 0, width1 = 0, width2 = 0;
3783 	char *seg0 = NULL, *seg1 = NULL, *seg2 = NULL;
3784 
3785 	*wtotal = 0;
3786 
3787 	rms = regmatch->rm_so;
3788 	rme = regmatch->rm_eo;
3789 
3790 	err = expand_tab(&exstr, line);
3791 	if (err)
3792 		return err;
3793 
3794 	/* Split the line into 3 segments, according to match offsets. */
3795 	seg0 = strndup(exstr, rms);
3796 	if (seg0 == NULL) {
3797 		err = got_error_from_errno("strndup");
3798 		goto done;
3799 	}
3800 	seg1 = strndup(exstr + rms, rme - rms);
3801 	if (seg1 == NULL) {
3802 		err = got_error_from_errno("strndup");
3803 		goto done;
3804 	}
3805 	seg2 = strdup(exstr + rme);
3806 	if (seg2 == NULL) {
3807 		err = got_error_from_errno("strndup");
3808 		goto done;
3809 	}
3810 
3811 	/* draw up to matched token if we haven't scrolled past it */
3812 	err = format_line(&wline, &width0, NULL, seg0, 0, wlimit,
3813 	    col_tab_align, 1);
3814 	if (err)
3815 		goto done;
3816 	n = MAX(width0 - skipcol, 0);
3817 	if (n) {
3818 		free(wline);
3819 		err = format_line(&wline, &width, &scrollx, seg0, skipcol,
3820 		    wlimit, col_tab_align, 1);
3821 		if (err)
3822 			goto done;
3823 		waddwstr(window, &wline[scrollx]);
3824 		wlimit -= width;
3825 		*wtotal += width;
3826 	}
3827 
3828 	if (wlimit > 0) {
3829 		int i = 0, w = 0;
3830 		size_t wlen;
3831 
3832 		free(wline);
3833 		err = format_line(&wline, &width1, NULL, seg1, 0, wlimit,
3834 		    col_tab_align, 1);
3835 		if (err)
3836 			goto done;
3837 		wlen = wcslen(wline);
3838 		while (i < wlen) {
3839 			width = wcwidth(wline[i]);
3840 			if (width == -1) {
3841 				/* should not happen, tabs are expanded */
3842 				err = got_error(GOT_ERR_RANGE);
3843 				goto done;
3844 			}
3845 			if (width0 + w + width > skipcol)
3846 				break;
3847 			w += width;
3848 			i++;
3849 		}
3850 		/* draw (visible part of) matched token (if scrolled into it) */
3851 		if (width1 - w > 0) {
3852 			wattron(window, A_STANDOUT);
3853 			waddwstr(window, &wline[i]);
3854 			wattroff(window, A_STANDOUT);
3855 			wlimit -= (width1 - w);
3856 			*wtotal += (width1 - w);
3857 		}
3858 	}
3859 
3860 	if (wlimit > 0) {  /* draw rest of line */
3861 		free(wline);
3862 		if (skipcol > width0 + width1) {
3863 			err = format_line(&wline, &width2, &scrollx, seg2,
3864 			    skipcol - (width0 + width1), wlimit,
3865 			    col_tab_align, 1);
3866 			if (err)
3867 				goto done;
3868 			waddwstr(window, &wline[scrollx]);
3869 		} else {
3870 			err = format_line(&wline, &width2, NULL, seg2, 0,
3871 			    wlimit, col_tab_align, 1);
3872 			if (err)
3873 				goto done;
3874 			waddwstr(window, wline);
3875 		}
3876 		*wtotal += width2;
3877 	}
3878 done:
3879 	free(wline);
3880 	free(exstr);
3881 	free(seg0);
3882 	free(seg1);
3883 	free(seg2);
3884 	return err;
3885 }
3886 
3887 static const struct got_error *
3888 draw_file(struct tog_view *view, const char *header)
3889 {
3890 	struct tog_diff_view_state *s = &view->state.diff;
3891 	regmatch_t *regmatch = &view->regmatch;
3892 	const struct got_error *err;
3893 	int nprinted = 0;
3894 	char *line;
3895 	size_t linesize = 0;
3896 	ssize_t linelen;
3897 	struct tog_color *tc;
3898 	wchar_t *wline;
3899 	int width;
3900 	int max_lines = view->nlines;
3901 	int nlines = s->nlines;
3902 	off_t line_offset;
3903 
3904 	line_offset = s->line_offsets[s->first_displayed_line - 1];
3905 	if (fseeko(s->f, line_offset, SEEK_SET) == -1)
3906 		return got_error_from_errno("fseek");
3907 
3908 	werase(view->window);
3909 
3910 	if (header) {
3911 		if (asprintf(&line, "[%d/%d] %s",
3912 		    s->first_displayed_line - 1 + s->selected_line, nlines,
3913 		    header) == -1)
3914 			return got_error_from_errno("asprintf");
3915 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
3916 		    0, 0);
3917 		free(line);
3918 		if (err)
3919 			return err;
3920 
3921 		if (view_needs_focus_indication(view))
3922 			wstandout(view->window);
3923 		waddwstr(view->window, wline);
3924 		free(wline);
3925 		wline = NULL;
3926 		if (view_needs_focus_indication(view))
3927 			wstandend(view->window);
3928 		if (width <= view->ncols - 1)
3929 			waddch(view->window, '\n');
3930 
3931 		if (max_lines <= 1)
3932 			return NULL;
3933 		max_lines--;
3934 	}
3935 
3936 	s->eof = 0;
3937 	view->maxx = 0;
3938 	line = NULL;
3939 	while (max_lines > 0 && nprinted < max_lines) {
3940 		linelen = getline(&line, &linesize, s->f);
3941 		if (linelen == -1) {
3942 			if (feof(s->f)) {
3943 				s->eof = 1;
3944 				break;
3945 			}
3946 			free(line);
3947 			return got_ferror(s->f, GOT_ERR_IO);
3948 		}
3949 
3950 		/* Set view->maxx based on full line length. */
3951 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 0,
3952 		    view->x ? 1 : 0);
3953 		if (err) {
3954 			free(line);
3955 			return err;
3956 		}
3957 		view->maxx = MAX(view->maxx, width);
3958 		free(wline);
3959 		wline = NULL;
3960 
3961 		tc = match_color(&s->colors, line);
3962 		if (tc)
3963 			wattr_on(view->window,
3964 			    COLOR_PAIR(tc->colorpair), NULL);
3965 		if (s->first_displayed_line + nprinted == s->matched_line &&
3966 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
3967 			err = add_matched_line(&width, line, view->ncols, 0,
3968 			    view->window, view->x, regmatch);
3969 			if (err) {
3970 				free(line);
3971 				return err;
3972 			}
3973 		} else {
3974 			int skip;
3975 			err = format_line(&wline, &width, &skip, line,
3976 			    view->x, view->ncols, 0, view->x ? 1 : 0);
3977 			if (err) {
3978 				free(line);
3979 				return err;
3980 			}
3981 			waddwstr(view->window, &wline[skip]);
3982 			free(wline);
3983 			wline = NULL;
3984 		}
3985 		if (tc)
3986 			wattr_off(view->window,
3987 			    COLOR_PAIR(tc->colorpair), NULL);
3988 		if (width <= view->ncols - 1)
3989 			waddch(view->window, '\n');
3990 		nprinted++;
3991 	}
3992 	free(line);
3993 	if (nprinted >= 1)
3994 		s->last_displayed_line = s->first_displayed_line +
3995 		    (nprinted - 1);
3996 	else
3997 		s->last_displayed_line = s->first_displayed_line;
3998 
3999 	view_border(view);
4000 
4001 	if (s->eof) {
4002 		while (nprinted < view->nlines) {
4003 			waddch(view->window, '\n');
4004 			nprinted++;
4005 		}
4006 
4007 		err = format_line(&wline, &width, NULL, TOG_EOF_STRING, 0,
4008 		    view->ncols, 0, 0);
4009 		if (err) {
4010 			return err;
4011 		}
4012 
4013 		wstandout(view->window);
4014 		waddwstr(view->window, wline);
4015 		free(wline);
4016 		wline = NULL;
4017 		wstandend(view->window);
4018 	}
4019 
4020 	return NULL;
4021 }
4022 
4023 static char *
4024 get_datestr(time_t *time, char *datebuf)
4025 {
4026 	struct tm mytm, *tm;
4027 	char *p, *s;
4028 
4029 	tm = gmtime_r(time, &mytm);
4030 	if (tm == NULL)
4031 		return NULL;
4032 	s = asctime_r(tm, datebuf);
4033 	if (s == NULL)
4034 		return NULL;
4035 	p = strchr(s, '\n');
4036 	if (p)
4037 		*p = '\0';
4038 	return s;
4039 }
4040 
4041 static const struct got_error *
4042 get_changed_paths(struct got_pathlist_head *paths,
4043     struct got_commit_object *commit, struct got_repository *repo)
4044 {
4045 	const struct got_error *err = NULL;
4046 	struct got_object_id *tree_id1 = NULL, *tree_id2 = NULL;
4047 	struct got_tree_object *tree1 = NULL, *tree2 = NULL;
4048 	struct got_object_qid *qid;
4049 
4050 	qid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
4051 	if (qid != NULL) {
4052 		struct got_commit_object *pcommit;
4053 		err = got_object_open_as_commit(&pcommit, repo,
4054 		    &qid->id);
4055 		if (err)
4056 			return err;
4057 
4058 		tree_id1 = got_object_id_dup(
4059 		    got_object_commit_get_tree_id(pcommit));
4060 		if (tree_id1 == NULL) {
4061 			got_object_commit_close(pcommit);
4062 			return got_error_from_errno("got_object_id_dup");
4063 		}
4064 		got_object_commit_close(pcommit);
4065 
4066 	}
4067 
4068 	if (tree_id1) {
4069 		err = got_object_open_as_tree(&tree1, repo, tree_id1);
4070 		if (err)
4071 			goto done;
4072 	}
4073 
4074 	tree_id2 = got_object_commit_get_tree_id(commit);
4075 	err = got_object_open_as_tree(&tree2, repo, tree_id2);
4076 	if (err)
4077 		goto done;
4078 
4079 	err = got_diff_tree(tree1, tree2, NULL, NULL, -1, -1, "", "", repo,
4080 	    got_diff_tree_collect_changed_paths, paths, 0);
4081 done:
4082 	if (tree1)
4083 		got_object_tree_close(tree1);
4084 	if (tree2)
4085 		got_object_tree_close(tree2);
4086 	free(tree_id1);
4087 	return err;
4088 }
4089 
4090 static const struct got_error *
4091 add_line_offset(off_t **line_offsets, size_t *nlines, off_t off)
4092 {
4093 	off_t *p;
4094 
4095 	p = reallocarray(*line_offsets, *nlines + 1, sizeof(off_t));
4096 	if (p == NULL)
4097 		return got_error_from_errno("reallocarray");
4098 	*line_offsets = p;
4099 	(*line_offsets)[*nlines] = off;
4100 	(*nlines)++;
4101 	return NULL;
4102 }
4103 
4104 static const struct got_error *
4105 write_commit_info(off_t **line_offsets, size_t *nlines,
4106     struct got_object_id *commit_id, struct got_reflist_head *refs,
4107     struct got_repository *repo, FILE *outfile)
4108 {
4109 	const struct got_error *err = NULL;
4110 	char datebuf[26], *datestr;
4111 	struct got_commit_object *commit;
4112 	char *id_str = NULL, *logmsg = NULL, *s = NULL, *line;
4113 	time_t committer_time;
4114 	const char *author, *committer;
4115 	char *refs_str = NULL;
4116 	struct got_pathlist_head changed_paths;
4117 	struct got_pathlist_entry *pe;
4118 	off_t outoff = 0;
4119 	int n;
4120 
4121 	TAILQ_INIT(&changed_paths);
4122 
4123 	if (refs) {
4124 		err = build_refs_str(&refs_str, refs, commit_id, repo);
4125 		if (err)
4126 			return err;
4127 	}
4128 
4129 	err = got_object_open_as_commit(&commit, repo, commit_id);
4130 	if (err)
4131 		return err;
4132 
4133 	err = got_object_id_str(&id_str, commit_id);
4134 	if (err) {
4135 		err = got_error_from_errno("got_object_id_str");
4136 		goto done;
4137 	}
4138 
4139 	err = add_line_offset(line_offsets, nlines, 0);
4140 	if (err)
4141 		goto done;
4142 
4143 	n = fprintf(outfile, "commit %s%s%s%s\n", id_str, refs_str ? " (" : "",
4144 	    refs_str ? refs_str : "", refs_str ? ")" : "");
4145 	if (n < 0) {
4146 		err = got_error_from_errno("fprintf");
4147 		goto done;
4148 	}
4149 	outoff += n;
4150 	err = add_line_offset(line_offsets, nlines, outoff);
4151 	if (err)
4152 		goto done;
4153 
4154 	n = fprintf(outfile, "from: %s\n",
4155 	    got_object_commit_get_author(commit));
4156 	if (n < 0) {
4157 		err = got_error_from_errno("fprintf");
4158 		goto done;
4159 	}
4160 	outoff += n;
4161 	err = add_line_offset(line_offsets, nlines, outoff);
4162 	if (err)
4163 		goto done;
4164 
4165 	committer_time = got_object_commit_get_committer_time(commit);
4166 	datestr = get_datestr(&committer_time, datebuf);
4167 	if (datestr) {
4168 		n = fprintf(outfile, "date: %s UTC\n", datestr);
4169 		if (n < 0) {
4170 			err = got_error_from_errno("fprintf");
4171 			goto done;
4172 		}
4173 		outoff += n;
4174 		err = add_line_offset(line_offsets, nlines, outoff);
4175 		if (err)
4176 			goto done;
4177 	}
4178 	author = got_object_commit_get_author(commit);
4179 	committer = got_object_commit_get_committer(commit);
4180 	if (strcmp(author, committer) != 0) {
4181 		n = fprintf(outfile, "via: %s\n", committer);
4182 		if (n < 0) {
4183 			err = got_error_from_errno("fprintf");
4184 			goto done;
4185 		}
4186 		outoff += n;
4187 		err = add_line_offset(line_offsets, nlines, outoff);
4188 		if (err)
4189 			goto done;
4190 	}
4191 	if (got_object_commit_get_nparents(commit) > 1) {
4192 		const struct got_object_id_queue *parent_ids;
4193 		struct got_object_qid *qid;
4194 		int pn = 1;
4195 		parent_ids = got_object_commit_get_parent_ids(commit);
4196 		STAILQ_FOREACH(qid, parent_ids, entry) {
4197 			err = got_object_id_str(&id_str, &qid->id);
4198 			if (err)
4199 				goto done;
4200 			n = fprintf(outfile, "parent %d: %s\n", pn++, id_str);
4201 			if (n < 0) {
4202 				err = got_error_from_errno("fprintf");
4203 				goto done;
4204 			}
4205 			outoff += n;
4206 			err = add_line_offset(line_offsets, nlines, outoff);
4207 			if (err)
4208 				goto done;
4209 			free(id_str);
4210 			id_str = NULL;
4211 		}
4212 	}
4213 
4214 	err = got_object_commit_get_logmsg(&logmsg, commit);
4215 	if (err)
4216 		goto done;
4217 	s = logmsg;
4218 	while ((line = strsep(&s, "\n")) != NULL) {
4219 		n = fprintf(outfile, "%s\n", line);
4220 		if (n < 0) {
4221 			err = got_error_from_errno("fprintf");
4222 			goto done;
4223 		}
4224 		outoff += n;
4225 		err = add_line_offset(line_offsets, nlines, outoff);
4226 		if (err)
4227 			goto done;
4228 	}
4229 
4230 	err = get_changed_paths(&changed_paths, commit, repo);
4231 	if (err)
4232 		goto done;
4233 	TAILQ_FOREACH(pe, &changed_paths, entry) {
4234 		struct got_diff_changed_path *cp = pe->data;
4235 		n = fprintf(outfile, "%c  %s\n", cp->status, pe->path);
4236 		if (n < 0) {
4237 			err = got_error_from_errno("fprintf");
4238 			goto done;
4239 		}
4240 		outoff += n;
4241 		err = add_line_offset(line_offsets, nlines, outoff);
4242 		if (err)
4243 			goto done;
4244 		free((char *)pe->path);
4245 		free(pe->data);
4246 	}
4247 
4248 	fputc('\n', outfile);
4249 	outoff++;
4250 	err = add_line_offset(line_offsets, nlines, outoff);
4251 done:
4252 	got_pathlist_free(&changed_paths);
4253 	free(id_str);
4254 	free(logmsg);
4255 	free(refs_str);
4256 	got_object_commit_close(commit);
4257 	if (err) {
4258 		free(*line_offsets);
4259 		*line_offsets = NULL;
4260 		*nlines = 0;
4261 	}
4262 	return err;
4263 }
4264 
4265 static const struct got_error *
4266 create_diff(struct tog_diff_view_state *s)
4267 {
4268 	const struct got_error *err = NULL;
4269 	FILE *f = NULL;
4270 	int obj_type;
4271 
4272 	free(s->line_offsets);
4273 	s->line_offsets = malloc(sizeof(off_t));
4274 	if (s->line_offsets == NULL)
4275 		return got_error_from_errno("malloc");
4276 	s->nlines = 0;
4277 
4278 	f = got_opentemp();
4279 	if (f == NULL) {
4280 		err = got_error_from_errno("got_opentemp");
4281 		goto done;
4282 	}
4283 	if (s->f && fclose(s->f) == EOF) {
4284 		err = got_error_from_errno("fclose");
4285 		goto done;
4286 	}
4287 	s->f = f;
4288 
4289 	if (s->id1)
4290 		err = got_object_get_type(&obj_type, s->repo, s->id1);
4291 	else
4292 		err = got_object_get_type(&obj_type, s->repo, s->id2);
4293 	if (err)
4294 		goto done;
4295 
4296 	switch (obj_type) {
4297 	case GOT_OBJ_TYPE_BLOB:
4298 		err = got_diff_objects_as_blobs(&s->line_offsets, &s->nlines,
4299 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2,
4300 		    s->label1, s->label2, tog_diff_algo, s->diff_context,
4301 		    s->ignore_whitespace, s->force_text_diff, s->repo, s->f);
4302 		break;
4303 	case GOT_OBJ_TYPE_TREE:
4304 		err = got_diff_objects_as_trees(&s->line_offsets, &s->nlines,
4305 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL, "", "",
4306 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4307 		    s->force_text_diff, s->repo, s->f);
4308 		break;
4309 	case GOT_OBJ_TYPE_COMMIT: {
4310 		const struct got_object_id_queue *parent_ids;
4311 		struct got_object_qid *pid;
4312 		struct got_commit_object *commit2;
4313 		struct got_reflist_head *refs;
4314 
4315 		err = got_object_open_as_commit(&commit2, s->repo, s->id2);
4316 		if (err)
4317 			goto done;
4318 		refs = got_reflist_object_id_map_lookup(tog_refs_idmap, s->id2);
4319 		/* Show commit info if we're diffing to a parent/root commit. */
4320 		if (s->id1 == NULL) {
4321 			err = write_commit_info(&s->line_offsets, &s->nlines,
4322 			    s->id2, refs, s->repo, s->f);
4323 			if (err)
4324 				goto done;
4325 		} else {
4326 			parent_ids = got_object_commit_get_parent_ids(commit2);
4327 			STAILQ_FOREACH(pid, parent_ids, entry) {
4328 				if (got_object_id_cmp(s->id1, &pid->id) == 0) {
4329 					err = write_commit_info(
4330 					    &s->line_offsets, &s->nlines,
4331 					    s->id2, refs, s->repo, s->f);
4332 					if (err)
4333 						goto done;
4334 					break;
4335 				}
4336 			}
4337 		}
4338 		got_object_commit_close(commit2);
4339 
4340 		err = got_diff_objects_as_commits(&s->line_offsets, &s->nlines,
4341 		    s->f1, s->f2, s->fd1, s->fd2, s->id1, s->id2, NULL,
4342 		    tog_diff_algo, s->diff_context, s->ignore_whitespace,
4343 		    s->force_text_diff, s->repo, s->f);
4344 		break;
4345 	}
4346 	default:
4347 		err = got_error(GOT_ERR_OBJ_TYPE);
4348 		break;
4349 	}
4350 	if (err)
4351 		goto done;
4352 done:
4353 	if (s->f && fflush(s->f) != 0 && err == NULL)
4354 		err = got_error_from_errno("fflush");
4355 	return err;
4356 }
4357 
4358 static void
4359 diff_view_indicate_progress(struct tog_view *view)
4360 {
4361 	mvwaddstr(view->window, 0, 0, "diffing...");
4362 	update_panels();
4363 	doupdate();
4364 }
4365 
4366 static const struct got_error *
4367 search_start_diff_view(struct tog_view *view)
4368 {
4369 	struct tog_diff_view_state *s = &view->state.diff;
4370 
4371 	s->matched_line = 0;
4372 	return NULL;
4373 }
4374 
4375 static const struct got_error *
4376 search_next_diff_view(struct tog_view *view)
4377 {
4378 	struct tog_diff_view_state *s = &view->state.diff;
4379 	const struct got_error *err = NULL;
4380 	int lineno;
4381 	char *line = NULL;
4382 	size_t linesize = 0;
4383 	ssize_t linelen;
4384 
4385 	if (!view->searching) {
4386 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
4387 		return NULL;
4388 	}
4389 
4390 	if (s->matched_line) {
4391 		if (view->searching == TOG_SEARCH_FORWARD)
4392 			lineno = s->matched_line + 1;
4393 		else
4394 			lineno = s->matched_line - 1;
4395 	} else
4396 		lineno = s->first_displayed_line;
4397 
4398 	while (1) {
4399 		off_t offset;
4400 
4401 		if (lineno <= 0 || lineno > s->nlines) {
4402 			if (s->matched_line == 0) {
4403 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4404 				break;
4405 			}
4406 
4407 			if (view->searching == TOG_SEARCH_FORWARD)
4408 				lineno = 1;
4409 			else
4410 				lineno = s->nlines;
4411 		}
4412 
4413 		offset = s->line_offsets[lineno - 1];
4414 		if (fseeko(s->f, offset, SEEK_SET) != 0) {
4415 			free(line);
4416 			return got_error_from_errno("fseeko");
4417 		}
4418 		linelen = getline(&line, &linesize, s->f);
4419 		if (linelen != -1) {
4420 			char *exstr;
4421 			err = expand_tab(&exstr, line);
4422 			if (err)
4423 				break;
4424 			if (match_line(exstr, &view->regex, 1,
4425 			    &view->regmatch)) {
4426 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
4427 				s->matched_line = lineno;
4428 				free(exstr);
4429 				break;
4430 			}
4431 			free(exstr);
4432 		}
4433 		if (view->searching == TOG_SEARCH_FORWARD)
4434 			lineno++;
4435 		else
4436 			lineno--;
4437 	}
4438 	free(line);
4439 
4440 	if (s->matched_line) {
4441 		s->first_displayed_line = s->matched_line;
4442 		s->selected_line = 1;
4443 	}
4444 
4445 	return err;
4446 }
4447 
4448 static const struct got_error *
4449 close_diff_view(struct tog_view *view)
4450 {
4451 	const struct got_error *err = NULL;
4452 	struct tog_diff_view_state *s = &view->state.diff;
4453 
4454 	free(s->id1);
4455 	s->id1 = NULL;
4456 	free(s->id2);
4457 	s->id2 = NULL;
4458 	if (s->f && fclose(s->f) == EOF)
4459 		err = got_error_from_errno("fclose");
4460 	s->f = NULL;
4461 	if (s->f1 && fclose(s->f1) == EOF && err == NULL)
4462 		err = got_error_from_errno("fclose");
4463 	s->f1 = NULL;
4464 	if (s->f2 && fclose(s->f2) == EOF && err == NULL)
4465 		err = got_error_from_errno("fclose");
4466 	s->f2 = NULL;
4467 	if (s->fd1 != -1 && close(s->fd1) == -1 && err == NULL)
4468 		err = got_error_from_errno("close");
4469 	s->fd1 = -1;
4470 	if (s->fd2 != -1 && close(s->fd2) == -1 && err == NULL)
4471 		err = got_error_from_errno("close");
4472 	s->fd2 = -1;
4473 	free_colors(&s->colors);
4474 	free(s->line_offsets);
4475 	s->line_offsets = NULL;
4476 	s->nlines = 0;
4477 	return err;
4478 }
4479 
4480 static const struct got_error *
4481 open_diff_view(struct tog_view *view, struct got_object_id *id1,
4482     struct got_object_id *id2, const char *label1, const char *label2,
4483     int diff_context, int ignore_whitespace, int force_text_diff,
4484     struct tog_view *parent_view, struct got_repository *repo)
4485 {
4486 	const struct got_error *err;
4487 	struct tog_diff_view_state *s = &view->state.diff;
4488 
4489 	memset(s, 0, sizeof(*s));
4490 	s->fd1 = -1;
4491 	s->fd2 = -1;
4492 
4493 	if (id1 != NULL && id2 != NULL) {
4494 	    int type1, type2;
4495 	    err = got_object_get_type(&type1, repo, id1);
4496 	    if (err)
4497 		return err;
4498 	    err = got_object_get_type(&type2, repo, id2);
4499 	    if (err)
4500 		return err;
4501 
4502 	    if (type1 != type2)
4503 		return got_error(GOT_ERR_OBJ_TYPE);
4504 	}
4505 	s->first_displayed_line = 1;
4506 	s->last_displayed_line = view->nlines;
4507 	s->selected_line = 1;
4508 	s->repo = repo;
4509 	s->id1 = id1;
4510 	s->id2 = id2;
4511 	s->label1 = label1;
4512 	s->label2 = label2;
4513 
4514 	if (id1) {
4515 		s->id1 = got_object_id_dup(id1);
4516 		if (s->id1 == NULL)
4517 			return got_error_from_errno("got_object_id_dup");
4518 	} else
4519 		s->id1 = NULL;
4520 
4521 	s->id2 = got_object_id_dup(id2);
4522 	if (s->id2 == NULL) {
4523 		err = got_error_from_errno("got_object_id_dup");
4524 		goto done;
4525 	}
4526 
4527 	s->f1 = got_opentemp();
4528 	if (s->f1 == NULL) {
4529 		err = got_error_from_errno("got_opentemp");
4530 		goto done;
4531 	}
4532 
4533 	s->f2 = got_opentemp();
4534 	if (s->f2 == NULL) {
4535 		err = got_error_from_errno("got_opentemp");
4536 		goto done;
4537 	}
4538 
4539 	s->fd1 = got_opentempfd();
4540 	if (s->fd1 == -1) {
4541 		err = got_error_from_errno("got_opentempfd");
4542 		goto done;
4543 	}
4544 
4545 	s->fd2 = got_opentempfd();
4546 	if (s->fd2 == -1) {
4547 		err = got_error_from_errno("got_opentempfd");
4548 		goto done;
4549 	}
4550 
4551 	s->first_displayed_line = 1;
4552 	s->last_displayed_line = view->nlines;
4553 	s->diff_context = diff_context;
4554 	s->ignore_whitespace = ignore_whitespace;
4555 	s->force_text_diff = force_text_diff;
4556 	s->parent_view = parent_view;
4557 	s->repo = repo;
4558 
4559 	STAILQ_INIT(&s->colors);
4560 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
4561 		err = add_color(&s->colors,
4562 		    "^-", TOG_COLOR_DIFF_MINUS,
4563 		    get_color_value("TOG_COLOR_DIFF_MINUS"));
4564 		if (err)
4565 			goto done;
4566 		err = add_color(&s->colors, "^\\+",
4567 		    TOG_COLOR_DIFF_PLUS,
4568 		    get_color_value("TOG_COLOR_DIFF_PLUS"));
4569 		if (err)
4570 			goto done;
4571 		err = add_color(&s->colors,
4572 		    "^@@", TOG_COLOR_DIFF_CHUNK_HEADER,
4573 		    get_color_value("TOG_COLOR_DIFF_CHUNK_HEADER"));
4574 		if (err)
4575 			goto done;
4576 
4577 		err = add_color(&s->colors,
4578 		    "^(commit [0-9a-f]|parent [0-9]|"
4579 		    "(blob|file|tree|commit) [-+] |"
4580 		    "[MDmA]  [^ ])", TOG_COLOR_DIFF_META,
4581 		    get_color_value("TOG_COLOR_DIFF_META"));
4582 		if (err)
4583 			goto done;
4584 
4585 		err = add_color(&s->colors,
4586 		    "^(from|via): ", TOG_COLOR_AUTHOR,
4587 		    get_color_value("TOG_COLOR_AUTHOR"));
4588 		if (err)
4589 			goto done;
4590 
4591 		err = add_color(&s->colors,
4592 		    "^date: ", TOG_COLOR_DATE,
4593 		    get_color_value("TOG_COLOR_DATE"));
4594 		if (err)
4595 			goto done;
4596 	}
4597 
4598 	if (parent_view && parent_view->type == TOG_VIEW_LOG &&
4599 	    view_is_splitscreen(view))
4600 		show_log_view(parent_view); /* draw border */
4601 	diff_view_indicate_progress(view);
4602 
4603 	err = create_diff(s);
4604 
4605 	view->show = show_diff_view;
4606 	view->input = input_diff_view;
4607 	view->reset = reset_diff_view;
4608 	view->close = close_diff_view;
4609 	view->search_start = search_start_diff_view;
4610 	view->search_next = search_next_diff_view;
4611 done:
4612 	if (err)
4613 		close_diff_view(view);
4614 	return err;
4615 }
4616 
4617 static const struct got_error *
4618 show_diff_view(struct tog_view *view)
4619 {
4620 	const struct got_error *err;
4621 	struct tog_diff_view_state *s = &view->state.diff;
4622 	char *id_str1 = NULL, *id_str2, *header;
4623 	const char *label1, *label2;
4624 
4625 	if (s->id1) {
4626 		err = got_object_id_str(&id_str1, s->id1);
4627 		if (err)
4628 			return err;
4629 		label1 = s->label1 ? : id_str1;
4630 	} else
4631 		label1 = "/dev/null";
4632 
4633 	err = got_object_id_str(&id_str2, s->id2);
4634 	if (err)
4635 		return err;
4636 	label2 = s->label2 ? : id_str2;
4637 
4638 	if (asprintf(&header, "diff %s %s", label1, label2) == -1) {
4639 		err = got_error_from_errno("asprintf");
4640 		free(id_str1);
4641 		free(id_str2);
4642 		return err;
4643 	}
4644 	free(id_str1);
4645 	free(id_str2);
4646 
4647 	err = draw_file(view, header);
4648 	free(header);
4649 	return err;
4650 }
4651 
4652 static const struct got_error *
4653 set_selected_commit(struct tog_diff_view_state *s,
4654     struct commit_queue_entry *entry)
4655 {
4656 	const struct got_error *err;
4657 	const struct got_object_id_queue *parent_ids;
4658 	struct got_commit_object *selected_commit;
4659 	struct got_object_qid *pid;
4660 
4661 	free(s->id2);
4662 	s->id2 = got_object_id_dup(entry->id);
4663 	if (s->id2 == NULL)
4664 		return got_error_from_errno("got_object_id_dup");
4665 
4666 	err = got_object_open_as_commit(&selected_commit, s->repo, entry->id);
4667 	if (err)
4668 		return err;
4669 	parent_ids = got_object_commit_get_parent_ids(selected_commit);
4670 	free(s->id1);
4671 	pid = STAILQ_FIRST(parent_ids);
4672 	s->id1 = pid ? got_object_id_dup(&pid->id) : NULL;
4673 	got_object_commit_close(selected_commit);
4674 	return NULL;
4675 }
4676 
4677 static const struct got_error *
4678 reset_diff_view(struct tog_view *view)
4679 {
4680 	struct tog_diff_view_state *s = &view->state.diff;
4681 
4682 	view->count = 0;
4683 	wclear(view->window);
4684 	s->first_displayed_line = 1;
4685 	s->last_displayed_line = view->nlines;
4686 	s->matched_line = 0;
4687 	diff_view_indicate_progress(view);
4688 	return create_diff(s);
4689 }
4690 
4691 static struct got_object_id *get_selected_commit_id(struct tog_blame_line *,
4692     int, int, int);
4693 static struct got_object_id *get_annotation_for_line(struct tog_blame_line *,
4694     int, int);
4695 
4696 static const struct got_error *
4697 input_diff_view(struct tog_view **new_view, struct tog_view *view, int ch)
4698 {
4699 	const struct got_error *err = NULL;
4700 	struct tog_diff_view_state *s = &view->state.diff;
4701 	struct tog_log_view_state *ls;
4702 	struct commit_queue_entry *old_selected_entry;
4703 	char *line = NULL;
4704 	size_t linesize = 0;
4705 	ssize_t linelen;
4706 	int i, nscroll = view->nlines - 1, up = 0;
4707 
4708 	switch (ch) {
4709 	case '0':
4710 		view->x = 0;
4711 		break;
4712 	case '$':
4713 		view->x = MAX(view->maxx - view->ncols / 3, 0);
4714 		view->count = 0;
4715 		break;
4716 	case KEY_RIGHT:
4717 	case 'l':
4718 		if (view->x + view->ncols / 3 < view->maxx)
4719 			view->x += 2;  /* move two columns right */
4720 		else
4721 			view->count = 0;
4722 		break;
4723 	case KEY_LEFT:
4724 	case 'h':
4725 		view->x -= MIN(view->x, 2);  /* move two columns back */
4726 		if (view->x <= 0)
4727 			view->count = 0;
4728 		break;
4729 	case 'a':
4730 	case 'w':
4731 		if (ch == 'a')
4732 			s->force_text_diff = !s->force_text_diff;
4733 		if (ch == 'w')
4734 			s->ignore_whitespace = !s->ignore_whitespace;
4735 		err = reset_diff_view(view);
4736 		break;
4737 	case 'g':
4738 	case KEY_HOME:
4739 		s->first_displayed_line = 1;
4740 		view->count = 0;
4741 		break;
4742 	case 'G':
4743 	case KEY_END:
4744 		view->count = 0;
4745 		if (s->eof)
4746 			break;
4747 
4748 		s->first_displayed_line = (s->nlines - view->nlines) + 2;
4749 		s->eof = 1;
4750 		break;
4751 	case 'k':
4752 	case KEY_UP:
4753 	case CTRL('p'):
4754 		if (s->first_displayed_line > 1)
4755 			s->first_displayed_line--;
4756 		else
4757 			view->count = 0;
4758 		break;
4759 	case CTRL('u'):
4760 	case 'u':
4761 		nscroll /= 2;
4762 		/* FALL THROUGH */
4763 	case KEY_PPAGE:
4764 	case CTRL('b'):
4765 	case 'b':
4766 		if (s->first_displayed_line == 1) {
4767 			view->count = 0;
4768 			break;
4769 		}
4770 		i = 0;
4771 		while (i++ < nscroll && s->first_displayed_line > 1)
4772 			s->first_displayed_line--;
4773 		break;
4774 	case 'j':
4775 	case KEY_DOWN:
4776 	case CTRL('n'):
4777 		if (!s->eof)
4778 			s->first_displayed_line++;
4779 		else
4780 			view->count = 0;
4781 		break;
4782 	case CTRL('d'):
4783 	case 'd':
4784 		nscroll /= 2;
4785 		/* FALL THROUGH */
4786 	case KEY_NPAGE:
4787 	case CTRL('f'):
4788 	case 'f':
4789 	case ' ':
4790 		if (s->eof) {
4791 			view->count = 0;
4792 			break;
4793 		}
4794 		i = 0;
4795 		while (!s->eof && i++ < nscroll) {
4796 			linelen = getline(&line, &linesize, s->f);
4797 			s->first_displayed_line++;
4798 			if (linelen == -1) {
4799 				if (feof(s->f)) {
4800 					s->eof = 1;
4801 				} else
4802 					err = got_ferror(s->f, GOT_ERR_IO);
4803 				break;
4804 			}
4805 		}
4806 		free(line);
4807 		break;
4808 	case '[':
4809 		if (s->diff_context > 0) {
4810 			s->diff_context--;
4811 			s->matched_line = 0;
4812 			diff_view_indicate_progress(view);
4813 			err = create_diff(s);
4814 			if (s->first_displayed_line + view->nlines - 1 >
4815 			    s->nlines) {
4816 				s->first_displayed_line = 1;
4817 				s->last_displayed_line = view->nlines;
4818 			}
4819 		} else
4820 			view->count = 0;
4821 		break;
4822 	case ']':
4823 		if (s->diff_context < GOT_DIFF_MAX_CONTEXT) {
4824 			s->diff_context++;
4825 			s->matched_line = 0;
4826 			diff_view_indicate_progress(view);
4827 			err = create_diff(s);
4828 		} else
4829 			view->count = 0;
4830 		break;
4831 	case '<':
4832 	case ',':
4833 	case 'K':
4834 		up = 1;
4835 		/* FALL THROUGH */
4836 	case '>':
4837 	case '.':
4838 	case 'J':
4839 		if (s->parent_view == NULL) {
4840 			view->count = 0;
4841 			break;
4842 		}
4843 		s->parent_view->count = view->count;
4844 
4845 		if (s->parent_view->type == TOG_VIEW_LOG) {
4846 			ls = &s->parent_view->state.log;
4847 			old_selected_entry = ls->selected_entry;
4848 
4849 			err = input_log_view(NULL, s->parent_view,
4850 			    up ? KEY_UP : KEY_DOWN);
4851 			if (err)
4852 				break;
4853 			view->count = s->parent_view->count;
4854 
4855 			if (old_selected_entry == ls->selected_entry)
4856 				break;
4857 
4858 			err = set_selected_commit(s, ls->selected_entry);
4859 			if (err)
4860 				break;
4861 		} else if (s->parent_view->type == TOG_VIEW_BLAME) {
4862 			struct tog_blame_view_state *bs;
4863 			struct got_object_id *id, *prev_id;
4864 
4865 			bs = &s->parent_view->state.blame;
4866 			prev_id = get_annotation_for_line(bs->blame.lines,
4867 			    bs->blame.nlines, bs->last_diffed_line);
4868 
4869 			err = input_blame_view(&view, s->parent_view,
4870 			    up ? KEY_UP : KEY_DOWN);
4871 			if (err)
4872 				break;
4873 			view->count = s->parent_view->count;
4874 
4875 			if (prev_id == NULL)
4876 				break;
4877 			id = get_selected_commit_id(bs->blame.lines,
4878 			    bs->blame.nlines, bs->first_displayed_line,
4879 			    bs->selected_line);
4880 			if (id == NULL)
4881 				break;
4882 
4883 			if (!got_object_id_cmp(prev_id, id))
4884 				break;
4885 
4886 			err = input_blame_view(&view, s->parent_view, KEY_ENTER);
4887 			if (err)
4888 				break;
4889 		}
4890 		s->first_displayed_line = 1;
4891 		s->last_displayed_line = view->nlines;
4892 		s->matched_line = 0;
4893 		view->x = 0;
4894 
4895 		diff_view_indicate_progress(view);
4896 		err = create_diff(s);
4897 		break;
4898 	default:
4899 		view->count = 0;
4900 		break;
4901 	}
4902 
4903 	return err;
4904 }
4905 
4906 static const struct got_error *
4907 cmd_diff(int argc, char *argv[])
4908 {
4909 	const struct got_error *error = NULL;
4910 	struct got_repository *repo = NULL;
4911 	struct got_worktree *worktree = NULL;
4912 	struct got_object_id *id1 = NULL, *id2 = NULL;
4913 	char *repo_path = NULL, *cwd = NULL;
4914 	char *id_str1 = NULL, *id_str2 = NULL;
4915 	char *label1 = NULL, *label2 = NULL;
4916 	int diff_context = 3, ignore_whitespace = 0;
4917 	int ch, force_text_diff = 0;
4918 	const char *errstr;
4919 	struct tog_view *view;
4920 	int *pack_fds = NULL;
4921 
4922 	while ((ch = getopt(argc, argv, "aC:r:w")) != -1) {
4923 		switch (ch) {
4924 		case 'a':
4925 			force_text_diff = 1;
4926 			break;
4927 		case 'C':
4928 			diff_context = strtonum(optarg, 0, GOT_DIFF_MAX_CONTEXT,
4929 			    &errstr);
4930 			if (errstr != NULL)
4931 				errx(1, "number of context lines is %s: %s",
4932 				    errstr, errstr);
4933 			break;
4934 		case 'r':
4935 			repo_path = realpath(optarg, NULL);
4936 			if (repo_path == NULL)
4937 				return got_error_from_errno2("realpath",
4938 				    optarg);
4939 			got_path_strip_trailing_slashes(repo_path);
4940 			break;
4941 		case 'w':
4942 			ignore_whitespace = 1;
4943 			break;
4944 		default:
4945 			usage_diff();
4946 			/* NOTREACHED */
4947 		}
4948 	}
4949 
4950 	argc -= optind;
4951 	argv += optind;
4952 
4953 	if (argc == 0) {
4954 		usage_diff(); /* TODO show local worktree changes */
4955 	} else if (argc == 2) {
4956 		id_str1 = argv[0];
4957 		id_str2 = argv[1];
4958 	} else
4959 		usage_diff();
4960 
4961 	error = got_repo_pack_fds_open(&pack_fds);
4962 	if (error)
4963 		goto done;
4964 
4965 	if (repo_path == NULL) {
4966 		cwd = getcwd(NULL, 0);
4967 		if (cwd == NULL)
4968 			return got_error_from_errno("getcwd");
4969 		error = got_worktree_open(&worktree, cwd);
4970 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
4971 			goto done;
4972 		if (worktree)
4973 			repo_path =
4974 			    strdup(got_worktree_get_repo_path(worktree));
4975 		else
4976 			repo_path = strdup(cwd);
4977 		if (repo_path == NULL) {
4978 			error = got_error_from_errno("strdup");
4979 			goto done;
4980 		}
4981 	}
4982 
4983 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
4984 	if (error)
4985 		goto done;
4986 
4987 	init_curses();
4988 
4989 	error = apply_unveil(got_repo_get_path(repo), NULL);
4990 	if (error)
4991 		goto done;
4992 
4993 	error = tog_load_refs(repo, 0);
4994 	if (error)
4995 		goto done;
4996 
4997 	error = got_repo_match_object_id(&id1, &label1, id_str1,
4998 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
4999 	if (error)
5000 		goto done;
5001 
5002 	error = got_repo_match_object_id(&id2, &label2, id_str2,
5003 	    GOT_OBJ_TYPE_ANY, &tog_refs, repo);
5004 	if (error)
5005 		goto done;
5006 
5007 	view = view_open(0, 0, 0, 0, TOG_VIEW_DIFF);
5008 	if (view == NULL) {
5009 		error = got_error_from_errno("view_open");
5010 		goto done;
5011 	}
5012 	error = open_diff_view(view, id1, id2, label1, label2, diff_context,
5013 	    ignore_whitespace, force_text_diff, NULL,  repo);
5014 	if (error)
5015 		goto done;
5016 	error = view_loop(view);
5017 done:
5018 	free(label1);
5019 	free(label2);
5020 	free(repo_path);
5021 	free(cwd);
5022 	if (repo) {
5023 		const struct got_error *close_err = got_repo_close(repo);
5024 		if (error == NULL)
5025 			error = close_err;
5026 	}
5027 	if (worktree)
5028 		got_worktree_close(worktree);
5029 	if (pack_fds) {
5030 		const struct got_error *pack_err =
5031 		    got_repo_pack_fds_close(pack_fds);
5032 		if (error == NULL)
5033 			error = pack_err;
5034 	}
5035 	tog_free_refs();
5036 	return error;
5037 }
5038 
5039 __dead static void
5040 usage_blame(void)
5041 {
5042 	endwin();
5043 	fprintf(stderr,
5044 	    "usage: %s blame [-c commit] [-r repository-path] path\n",
5045 	    getprogname());
5046 	exit(1);
5047 }
5048 
5049 struct tog_blame_line {
5050 	int annotated;
5051 	struct got_object_id *id;
5052 };
5053 
5054 static const struct got_error *
5055 draw_blame(struct tog_view *view)
5056 {
5057 	struct tog_blame_view_state *s = &view->state.blame;
5058 	struct tog_blame *blame = &s->blame;
5059 	regmatch_t *regmatch = &view->regmatch;
5060 	const struct got_error *err;
5061 	int lineno = 0, nprinted = 0;
5062 	char *line = NULL;
5063 	size_t linesize = 0;
5064 	ssize_t linelen;
5065 	wchar_t *wline;
5066 	int width;
5067 	struct tog_blame_line *blame_line;
5068 	struct got_object_id *prev_id = NULL;
5069 	char *id_str;
5070 	struct tog_color *tc;
5071 
5072 	err = got_object_id_str(&id_str, &s->blamed_commit->id);
5073 	if (err)
5074 		return err;
5075 
5076 	rewind(blame->f);
5077 	werase(view->window);
5078 
5079 	if (asprintf(&line, "commit %s", id_str) == -1) {
5080 		err = got_error_from_errno("asprintf");
5081 		free(id_str);
5082 		return err;
5083 	}
5084 
5085 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5086 	free(line);
5087 	line = NULL;
5088 	if (err)
5089 		return err;
5090 	if (view_needs_focus_indication(view))
5091 		wstandout(view->window);
5092 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5093 	if (tc)
5094 		wattr_on(view->window,
5095 		    COLOR_PAIR(tc->colorpair), NULL);
5096 	waddwstr(view->window, wline);
5097 	if (tc)
5098 		wattr_off(view->window,
5099 		    COLOR_PAIR(tc->colorpair), NULL);
5100 	if (view_needs_focus_indication(view))
5101 		wstandend(view->window);
5102 	free(wline);
5103 	wline = NULL;
5104 	if (width < view->ncols - 1)
5105 		waddch(view->window, '\n');
5106 
5107 	if (asprintf(&line, "[%d/%d] %s%s",
5108 	    s->first_displayed_line - 1 + s->selected_line, blame->nlines,
5109 	    s->blame_complete ? "" : "annotating... ", s->path) == -1) {
5110 		free(id_str);
5111 		return got_error_from_errno("asprintf");
5112 	}
5113 	free(id_str);
5114 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
5115 	free(line);
5116 	line = NULL;
5117 	if (err)
5118 		return err;
5119 	waddwstr(view->window, wline);
5120 	free(wline);
5121 	wline = NULL;
5122 	if (width < view->ncols - 1)
5123 		waddch(view->window, '\n');
5124 
5125 	s->eof = 0;
5126 	view->maxx = 0;
5127 	while (nprinted < view->nlines - 2) {
5128 		linelen = getline(&line, &linesize, blame->f);
5129 		if (linelen == -1) {
5130 			if (feof(blame->f)) {
5131 				s->eof = 1;
5132 				break;
5133 			}
5134 			free(line);
5135 			return got_ferror(blame->f, GOT_ERR_IO);
5136 		}
5137 		if (++lineno < s->first_displayed_line)
5138 			continue;
5139 
5140 		/* Set view->maxx based on full line length. */
5141 		err = format_line(&wline, &width, NULL, line, 0, INT_MAX, 9, 1);
5142 		if (err) {
5143 			free(line);
5144 			return err;
5145 		}
5146 		free(wline);
5147 		wline = NULL;
5148 		view->maxx = MAX(view->maxx, width);
5149 
5150 		if (nprinted == s->selected_line - 1)
5151 			wstandout(view->window);
5152 
5153 		if (blame->nlines > 0) {
5154 			blame_line = &blame->lines[lineno - 1];
5155 			if (blame_line->annotated && prev_id &&
5156 			    got_object_id_cmp(prev_id, blame_line->id) == 0 &&
5157 			    !(nprinted == s->selected_line - 1)) {
5158 				waddstr(view->window, "        ");
5159 			} else if (blame_line->annotated) {
5160 				char *id_str;
5161 				err = got_object_id_str(&id_str,
5162 				    blame_line->id);
5163 				if (err) {
5164 					free(line);
5165 					return err;
5166 				}
5167 				tc = get_color(&s->colors, TOG_COLOR_COMMIT);
5168 				if (tc)
5169 					wattr_on(view->window,
5170 					    COLOR_PAIR(tc->colorpair), NULL);
5171 				wprintw(view->window, "%.8s", id_str);
5172 				if (tc)
5173 					wattr_off(view->window,
5174 					    COLOR_PAIR(tc->colorpair), NULL);
5175 				free(id_str);
5176 				prev_id = blame_line->id;
5177 			} else {
5178 				waddstr(view->window, "........");
5179 				prev_id = NULL;
5180 			}
5181 		} else {
5182 			waddstr(view->window, "........");
5183 			prev_id = NULL;
5184 		}
5185 
5186 		if (nprinted == s->selected_line - 1)
5187 			wstandend(view->window);
5188 		waddstr(view->window, " ");
5189 
5190 		if (view->ncols <= 9) {
5191 			width = 9;
5192 		} else if (s->first_displayed_line + nprinted ==
5193 		    s->matched_line &&
5194 		    regmatch->rm_so >= 0 && regmatch->rm_so < regmatch->rm_eo) {
5195 			err = add_matched_line(&width, line, view->ncols - 9, 9,
5196 			    view->window, view->x, regmatch);
5197 			if (err) {
5198 				free(line);
5199 				return err;
5200 			}
5201 			width += 9;
5202 		} else {
5203 			int skip;
5204 			err = format_line(&wline, &width, &skip, line,
5205 			    view->x, view->ncols - 9, 9, 1);
5206 			if (err) {
5207 				free(line);
5208 				return err;
5209 			}
5210 			waddwstr(view->window, &wline[skip]);
5211 			width += 9;
5212 			free(wline);
5213 			wline = NULL;
5214 		}
5215 
5216 		if (width <= view->ncols - 1)
5217 			waddch(view->window, '\n');
5218 		if (++nprinted == 1)
5219 			s->first_displayed_line = lineno;
5220 	}
5221 	free(line);
5222 	s->last_displayed_line = lineno;
5223 
5224 	view_border(view);
5225 
5226 	return NULL;
5227 }
5228 
5229 static const struct got_error *
5230 blame_cb(void *arg, int nlines, int lineno,
5231     struct got_commit_object *commit, struct got_object_id *id)
5232 {
5233 	const struct got_error *err = NULL;
5234 	struct tog_blame_cb_args *a = arg;
5235 	struct tog_blame_line *line;
5236 	int errcode;
5237 
5238 	if (nlines != a->nlines ||
5239 	    (lineno != -1 && lineno < 1) || lineno > a->nlines)
5240 		return got_error(GOT_ERR_RANGE);
5241 
5242 	errcode = pthread_mutex_lock(&tog_mutex);
5243 	if (errcode)
5244 		return got_error_set_errno(errcode, "pthread_mutex_lock");
5245 
5246 	if (*a->quit) {	/* user has quit the blame view */
5247 		err = got_error(GOT_ERR_ITER_COMPLETED);
5248 		goto done;
5249 	}
5250 
5251 	if (lineno == -1)
5252 		goto done; /* no change in this commit */
5253 
5254 	line = &a->lines[lineno - 1];
5255 	if (line->annotated)
5256 		goto done;
5257 
5258 	line->id = got_object_id_dup(id);
5259 	if (line->id == NULL) {
5260 		err = got_error_from_errno("got_object_id_dup");
5261 		goto done;
5262 	}
5263 	line->annotated = 1;
5264 done:
5265 	errcode = pthread_mutex_unlock(&tog_mutex);
5266 	if (errcode)
5267 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5268 	return err;
5269 }
5270 
5271 static void *
5272 blame_thread(void *arg)
5273 {
5274 	const struct got_error *err, *close_err;
5275 	struct tog_blame_thread_args *ta = arg;
5276 	struct tog_blame_cb_args *a = ta->cb_args;
5277 	int errcode, fd1 = -1, fd2 = -1;
5278 	FILE *f1 = NULL, *f2 = NULL;
5279 
5280 	fd1 = got_opentempfd();
5281 	if (fd1 == -1)
5282 		return (void *)got_error_from_errno("got_opentempfd");
5283 
5284 	fd2 = got_opentempfd();
5285 	if (fd2 == -1) {
5286 		err = got_error_from_errno("got_opentempfd");
5287 		goto done;
5288 	}
5289 
5290 	f1 = got_opentemp();
5291 	if (f1 == NULL) {
5292 		err = (void *)got_error_from_errno("got_opentemp");
5293 		goto done;
5294 	}
5295 	f2 = got_opentemp();
5296 	if (f2 == NULL) {
5297 		err = (void *)got_error_from_errno("got_opentemp");
5298 		goto done;
5299 	}
5300 
5301 	err = block_signals_used_by_main_thread();
5302 	if (err)
5303 		goto done;
5304 
5305 	err = got_blame(ta->path, a->commit_id, ta->repo,
5306 	    tog_diff_algo, blame_cb, ta->cb_args,
5307 	    ta->cancel_cb, ta->cancel_arg, fd1, fd2, f1, f2);
5308 	if (err && err->code == GOT_ERR_CANCELLED)
5309 		err = NULL;
5310 
5311 	errcode = pthread_mutex_lock(&tog_mutex);
5312 	if (errcode) {
5313 		err = got_error_set_errno(errcode, "pthread_mutex_lock");
5314 		goto done;
5315 	}
5316 
5317 	close_err = got_repo_close(ta->repo);
5318 	if (err == NULL)
5319 		err = close_err;
5320 	ta->repo = NULL;
5321 	*ta->complete = 1;
5322 
5323 	errcode = pthread_mutex_unlock(&tog_mutex);
5324 	if (errcode && err == NULL)
5325 		err = got_error_set_errno(errcode, "pthread_mutex_unlock");
5326 
5327 done:
5328 	if (fd1 != -1 && close(fd1) == -1 && err == NULL)
5329 		err = got_error_from_errno("close");
5330 	if (fd2 != -1 && close(fd2) == -1 && err == NULL)
5331 		err = got_error_from_errno("close");
5332 	if (f1 && fclose(f1) == EOF && err == NULL)
5333 		err = got_error_from_errno("fclose");
5334 	if (f2 && fclose(f2) == EOF && err == NULL)
5335 		err = got_error_from_errno("fclose");
5336 
5337 	return (void *)err;
5338 }
5339 
5340 static struct got_object_id *
5341 get_selected_commit_id(struct tog_blame_line *lines, int nlines,
5342     int first_displayed_line, int selected_line)
5343 {
5344 	struct tog_blame_line *line;
5345 
5346 	if (nlines <= 0)
5347 		return NULL;
5348 
5349 	line = &lines[first_displayed_line - 1 + selected_line - 1];
5350 	if (!line->annotated)
5351 		return NULL;
5352 
5353 	return line->id;
5354 }
5355 
5356 static struct got_object_id *
5357 get_annotation_for_line(struct tog_blame_line *lines, int nlines,
5358     int lineno)
5359 {
5360 	struct tog_blame_line *line;
5361 
5362 	if (nlines <= 0 || lineno >= nlines)
5363 		return NULL;
5364 
5365 	line = &lines[lineno - 1];
5366 	if (!line->annotated)
5367 		return NULL;
5368 
5369 	return line->id;
5370 }
5371 
5372 static const struct got_error *
5373 stop_blame(struct tog_blame *blame)
5374 {
5375 	const struct got_error *err = NULL;
5376 	int i;
5377 
5378 	if (blame->thread) {
5379 		int errcode;
5380 		errcode = pthread_mutex_unlock(&tog_mutex);
5381 		if (errcode)
5382 			return got_error_set_errno(errcode,
5383 			    "pthread_mutex_unlock");
5384 		errcode = pthread_join(blame->thread, (void **)&err);
5385 		if (errcode)
5386 			return got_error_set_errno(errcode, "pthread_join");
5387 		errcode = pthread_mutex_lock(&tog_mutex);
5388 		if (errcode)
5389 			return got_error_set_errno(errcode,
5390 			    "pthread_mutex_lock");
5391 		if (err && err->code == GOT_ERR_ITER_COMPLETED)
5392 			err = NULL;
5393 		blame->thread = 0; //NULL;
5394 	}
5395 	if (blame->thread_args.repo) {
5396 		const struct got_error *close_err;
5397 		close_err = got_repo_close(blame->thread_args.repo);
5398 		if (err == NULL)
5399 			err = close_err;
5400 		blame->thread_args.repo = NULL;
5401 	}
5402 	if (blame->f) {
5403 		if (fclose(blame->f) == EOF && err == NULL)
5404 			err = got_error_from_errno("fclose");
5405 		blame->f = NULL;
5406 	}
5407 	if (blame->lines) {
5408 		for (i = 0; i < blame->nlines; i++)
5409 			free(blame->lines[i].id);
5410 		free(blame->lines);
5411 		blame->lines = NULL;
5412 	}
5413 	free(blame->cb_args.commit_id);
5414 	blame->cb_args.commit_id = NULL;
5415 	if (blame->pack_fds) {
5416 		const struct got_error *pack_err =
5417 		    got_repo_pack_fds_close(blame->pack_fds);
5418 		if (err == NULL)
5419 			err = pack_err;
5420 		blame->pack_fds = NULL;
5421 	}
5422 	return err;
5423 }
5424 
5425 static const struct got_error *
5426 cancel_blame_view(void *arg)
5427 {
5428 	const struct got_error *err = NULL;
5429 	int *done = arg;
5430 	int errcode;
5431 
5432 	errcode = pthread_mutex_lock(&tog_mutex);
5433 	if (errcode)
5434 		return got_error_set_errno(errcode,
5435 		    "pthread_mutex_unlock");
5436 
5437 	if (*done)
5438 		err = got_error(GOT_ERR_CANCELLED);
5439 
5440 	errcode = pthread_mutex_unlock(&tog_mutex);
5441 	if (errcode)
5442 		return got_error_set_errno(errcode,
5443 		    "pthread_mutex_lock");
5444 
5445 	return err;
5446 }
5447 
5448 static const struct got_error *
5449 run_blame(struct tog_view *view)
5450 {
5451 	struct tog_blame_view_state *s = &view->state.blame;
5452 	struct tog_blame *blame = &s->blame;
5453 	const struct got_error *err = NULL;
5454 	struct got_commit_object *commit = NULL;
5455 	struct got_blob_object *blob = NULL;
5456 	struct got_repository *thread_repo = NULL;
5457 	struct got_object_id *obj_id = NULL;
5458 	int obj_type, fd = -1;
5459 	int *pack_fds = NULL;
5460 
5461 	err = got_object_open_as_commit(&commit, s->repo,
5462 	    &s->blamed_commit->id);
5463 	if (err)
5464 		return err;
5465 
5466 	fd = got_opentempfd();
5467 	if (fd == -1) {
5468 		err = got_error_from_errno("got_opentempfd");
5469 		goto done;
5470 	}
5471 
5472 	err = got_object_id_by_path(&obj_id, s->repo, commit, s->path);
5473 	if (err)
5474 		goto done;
5475 
5476 	err = got_object_get_type(&obj_type, s->repo, obj_id);
5477 	if (err)
5478 		goto done;
5479 
5480 	if (obj_type != GOT_OBJ_TYPE_BLOB) {
5481 		err = got_error(GOT_ERR_OBJ_TYPE);
5482 		goto done;
5483 	}
5484 
5485 	err = got_object_open_as_blob(&blob, s->repo, obj_id, 8192, fd);
5486 	if (err)
5487 		goto done;
5488 	blame->f = got_opentemp();
5489 	if (blame->f == NULL) {
5490 		err = got_error_from_errno("got_opentemp");
5491 		goto done;
5492 	}
5493 	err = got_object_blob_dump_to_file(&blame->filesize, &blame->nlines,
5494 	    &blame->line_offsets, blame->f, blob);
5495 	if (err)
5496 		goto done;
5497 	if (blame->nlines == 0) {
5498 		s->blame_complete = 1;
5499 		goto done;
5500 	}
5501 
5502 	/* Don't include \n at EOF in the blame line count. */
5503 	if (blame->line_offsets[blame->nlines - 1] == blame->filesize)
5504 		blame->nlines--;
5505 
5506 	blame->lines = calloc(blame->nlines, sizeof(*blame->lines));
5507 	if (blame->lines == NULL) {
5508 		err = got_error_from_errno("calloc");
5509 		goto done;
5510 	}
5511 
5512 	err = got_repo_pack_fds_open(&pack_fds);
5513 	if (err)
5514 		goto done;
5515 	err = got_repo_open(&thread_repo, got_repo_get_path(s->repo), NULL,
5516 	    pack_fds);
5517 	if (err)
5518 		goto done;
5519 
5520 	blame->pack_fds = pack_fds;
5521 	blame->cb_args.view = view;
5522 	blame->cb_args.lines = blame->lines;
5523 	blame->cb_args.nlines = blame->nlines;
5524 	blame->cb_args.commit_id = got_object_id_dup(&s->blamed_commit->id);
5525 	if (blame->cb_args.commit_id == NULL) {
5526 		err = got_error_from_errno("got_object_id_dup");
5527 		goto done;
5528 	}
5529 	blame->cb_args.quit = &s->done;
5530 
5531 	blame->thread_args.path = s->path;
5532 	blame->thread_args.repo = thread_repo;
5533 	blame->thread_args.cb_args = &blame->cb_args;
5534 	blame->thread_args.complete = &s->blame_complete;
5535 	blame->thread_args.cancel_cb = cancel_blame_view;
5536 	blame->thread_args.cancel_arg = &s->done;
5537 	s->blame_complete = 0;
5538 
5539 	if (s->first_displayed_line + view->nlines - 1 > blame->nlines) {
5540 		s->first_displayed_line = 1;
5541 		s->last_displayed_line = view->nlines;
5542 		s->selected_line = 1;
5543 	}
5544 	s->matched_line = 0;
5545 
5546 done:
5547 	if (commit)
5548 		got_object_commit_close(commit);
5549 	if (fd != -1 && close(fd) == -1 && err == NULL)
5550 		err = got_error_from_errno("close");
5551 	if (blob)
5552 		got_object_blob_close(blob);
5553 	free(obj_id);
5554 	if (err)
5555 		stop_blame(blame);
5556 	return err;
5557 }
5558 
5559 static const struct got_error *
5560 open_blame_view(struct tog_view *view, char *path,
5561     struct got_object_id *commit_id, struct got_repository *repo)
5562 {
5563 	const struct got_error *err = NULL;
5564 	struct tog_blame_view_state *s = &view->state.blame;
5565 
5566 	STAILQ_INIT(&s->blamed_commits);
5567 
5568 	s->path = strdup(path);
5569 	if (s->path == NULL)
5570 		return got_error_from_errno("strdup");
5571 
5572 	err = got_object_qid_alloc(&s->blamed_commit, commit_id);
5573 	if (err) {
5574 		free(s->path);
5575 		return err;
5576 	}
5577 
5578 	STAILQ_INSERT_HEAD(&s->blamed_commits, s->blamed_commit, entry);
5579 	s->first_displayed_line = 1;
5580 	s->last_displayed_line = view->nlines;
5581 	s->selected_line = 1;
5582 	s->blame_complete = 0;
5583 	s->repo = repo;
5584 	s->commit_id = commit_id;
5585 	memset(&s->blame, 0, sizeof(s->blame));
5586 
5587 	STAILQ_INIT(&s->colors);
5588 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
5589 		err = add_color(&s->colors, "^", TOG_COLOR_COMMIT,
5590 		    get_color_value("TOG_COLOR_COMMIT"));
5591 		if (err)
5592 			return err;
5593 	}
5594 
5595 	view->show = show_blame_view;
5596 	view->input = input_blame_view;
5597 	view->reset = reset_blame_view;
5598 	view->close = close_blame_view;
5599 	view->search_start = search_start_blame_view;
5600 	view->search_next = search_next_blame_view;
5601 
5602 	return run_blame(view);
5603 }
5604 
5605 static const struct got_error *
5606 close_blame_view(struct tog_view *view)
5607 {
5608 	const struct got_error *err = NULL;
5609 	struct tog_blame_view_state *s = &view->state.blame;
5610 
5611 	if (s->blame.thread)
5612 		err = stop_blame(&s->blame);
5613 
5614 	while (!STAILQ_EMPTY(&s->blamed_commits)) {
5615 		struct got_object_qid *blamed_commit;
5616 		blamed_commit = STAILQ_FIRST(&s->blamed_commits);
5617 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5618 		got_object_qid_free(blamed_commit);
5619 	}
5620 
5621 	free(s->path);
5622 	free_colors(&s->colors);
5623 	return err;
5624 }
5625 
5626 static const struct got_error *
5627 search_start_blame_view(struct tog_view *view)
5628 {
5629 	struct tog_blame_view_state *s = &view->state.blame;
5630 
5631 	s->matched_line = 0;
5632 	return NULL;
5633 }
5634 
5635 static const struct got_error *
5636 search_next_blame_view(struct tog_view *view)
5637 {
5638 	struct tog_blame_view_state *s = &view->state.blame;
5639 	const struct got_error *err = NULL;
5640 	int lineno;
5641 	char *line = NULL;
5642 	size_t linesize = 0;
5643 	ssize_t linelen;
5644 
5645 	if (!view->searching) {
5646 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
5647 		return NULL;
5648 	}
5649 
5650 	if (s->matched_line) {
5651 		if (view->searching == TOG_SEARCH_FORWARD)
5652 			lineno = s->matched_line + 1;
5653 		else
5654 			lineno = s->matched_line - 1;
5655 	} else
5656 		lineno = s->first_displayed_line - 1 + s->selected_line;
5657 
5658 	while (1) {
5659 		off_t offset;
5660 
5661 		if (lineno <= 0 || lineno > s->blame.nlines) {
5662 			if (s->matched_line == 0) {
5663 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5664 				break;
5665 			}
5666 
5667 			if (view->searching == TOG_SEARCH_FORWARD)
5668 				lineno = 1;
5669 			else
5670 				lineno = s->blame.nlines;
5671 		}
5672 
5673 		offset = s->blame.line_offsets[lineno - 1];
5674 		if (fseeko(s->blame.f, offset, SEEK_SET) != 0) {
5675 			free(line);
5676 			return got_error_from_errno("fseeko");
5677 		}
5678 		linelen = getline(&line, &linesize, s->blame.f);
5679 		if (linelen != -1) {
5680 			char *exstr;
5681 			err = expand_tab(&exstr, line);
5682 			if (err)
5683 				break;
5684 			if (match_line(exstr, &view->regex, 1,
5685 			    &view->regmatch)) {
5686 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
5687 				s->matched_line = lineno;
5688 				free(exstr);
5689 				break;
5690 			}
5691 			free(exstr);
5692 		}
5693 		if (view->searching == TOG_SEARCH_FORWARD)
5694 			lineno++;
5695 		else
5696 			lineno--;
5697 	}
5698 	free(line);
5699 
5700 	if (s->matched_line) {
5701 		s->first_displayed_line = s->matched_line;
5702 		s->selected_line = 1;
5703 	}
5704 
5705 	return err;
5706 }
5707 
5708 static const struct got_error *
5709 show_blame_view(struct tog_view *view)
5710 {
5711 	const struct got_error *err = NULL;
5712 	struct tog_blame_view_state *s = &view->state.blame;
5713 	int errcode;
5714 
5715 	if (s->blame.thread == 0 && !s->blame_complete) {
5716 		errcode = pthread_create(&s->blame.thread, NULL, blame_thread,
5717 		    &s->blame.thread_args);
5718 		if (errcode)
5719 			return got_error_set_errno(errcode, "pthread_create");
5720 
5721 		halfdelay(1); /* fast refresh while annotating  */
5722 	}
5723 
5724 	if (s->blame_complete)
5725 		halfdelay(10); /* disable fast refresh */
5726 
5727 	err = draw_blame(view);
5728 
5729 	view_border(view);
5730 	return err;
5731 }
5732 
5733 static const struct got_error *
5734 log_annotated_line(struct tog_view **new_view, int begin_y, int begin_x,
5735     struct got_repository *repo, struct got_object_id *id)
5736 {
5737 	struct tog_view		*log_view;
5738 	const struct got_error	*err = NULL;
5739 
5740 	*new_view = NULL;
5741 
5742 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
5743 	if (log_view == NULL)
5744 		return got_error_from_errno("view_open");
5745 
5746 	err = open_log_view(log_view, id, repo, GOT_REF_HEAD, "", 0);
5747 	if (err)
5748 		view_close(log_view);
5749 	else
5750 		*new_view = log_view;
5751 
5752 	return err;
5753 }
5754 
5755 static const struct got_error *
5756 input_blame_view(struct tog_view **new_view, struct tog_view *view, int ch)
5757 {
5758 	const struct got_error *err = NULL, *thread_err = NULL;
5759 	struct tog_view *diff_view, *log_view;
5760 	struct tog_blame_view_state *s = &view->state.blame;
5761 	int eos, nscroll, begin_y = 0, begin_x = 0;
5762 
5763 	eos = nscroll = view->nlines - 2;
5764 	if (view_is_hsplit_top(view))
5765 		--eos;  /* border */
5766 
5767 	switch (ch) {
5768 	case '0':
5769 		view->x = 0;
5770 		break;
5771 	case '$':
5772 		view->x = MAX(view->maxx - view->ncols / 3, 0);
5773 		view->count = 0;
5774 		break;
5775 	case KEY_RIGHT:
5776 	case 'l':
5777 		if (view->x + view->ncols / 3 < view->maxx)
5778 			view->x += 2;  /* move two columns right */
5779 		else
5780 			view->count = 0;
5781 		break;
5782 	case KEY_LEFT:
5783 	case 'h':
5784 		view->x -= MIN(view->x, 2);  /* move two columns back */
5785 		if (view->x <= 0)
5786 			view->count = 0;
5787 		break;
5788 	case 'q':
5789 		s->done = 1;
5790 		break;
5791 	case 'g':
5792 	case KEY_HOME:
5793 		s->selected_line = 1;
5794 		s->first_displayed_line = 1;
5795 		view->count = 0;
5796 		break;
5797 	case 'G':
5798 	case KEY_END:
5799 		if (s->blame.nlines < eos) {
5800 			s->selected_line = s->blame.nlines;
5801 			s->first_displayed_line = 1;
5802 		} else {
5803 			s->selected_line = eos;
5804 			s->first_displayed_line = s->blame.nlines - (eos - 1);
5805 		}
5806 		view->count = 0;
5807 		break;
5808 	case 'k':
5809 	case KEY_UP:
5810 	case CTRL('p'):
5811 		if (s->selected_line > 1)
5812 			s->selected_line--;
5813 		else if (s->selected_line == 1 &&
5814 		    s->first_displayed_line > 1)
5815 			s->first_displayed_line--;
5816 		else
5817 			view->count = 0;
5818 		break;
5819 	case CTRL('u'):
5820 	case 'u':
5821 		nscroll /= 2;
5822 		/* FALL THROUGH */
5823 	case KEY_PPAGE:
5824 	case CTRL('b'):
5825 	case 'b':
5826 		if (s->first_displayed_line == 1) {
5827 			if (view->count > 1)
5828 				nscroll += nscroll;
5829 			s->selected_line = MAX(1, s->selected_line - nscroll);
5830 			view->count = 0;
5831 			break;
5832 		}
5833 		if (s->first_displayed_line > nscroll)
5834 			s->first_displayed_line -= nscroll;
5835 		else
5836 			s->first_displayed_line = 1;
5837 		break;
5838 	case 'j':
5839 	case KEY_DOWN:
5840 	case CTRL('n'):
5841 		if (s->selected_line < eos && s->first_displayed_line +
5842 		    s->selected_line <= s->blame.nlines)
5843 			s->selected_line++;
5844 		else if (s->first_displayed_line < s->blame.nlines - (eos - 1))
5845 			s->first_displayed_line++;
5846 		else
5847 			view->count = 0;
5848 		break;
5849 	case 'c':
5850 	case 'p': {
5851 		struct got_object_id *id = NULL;
5852 
5853 		view->count = 0;
5854 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5855 		    s->first_displayed_line, s->selected_line);
5856 		if (id == NULL)
5857 			break;
5858 		if (ch == 'p') {
5859 			struct got_commit_object *commit, *pcommit;
5860 			struct got_object_qid *pid;
5861 			struct got_object_id *blob_id = NULL;
5862 			int obj_type;
5863 			err = got_object_open_as_commit(&commit,
5864 			    s->repo, id);
5865 			if (err)
5866 				break;
5867 			pid = STAILQ_FIRST(
5868 			    got_object_commit_get_parent_ids(commit));
5869 			if (pid == NULL) {
5870 				got_object_commit_close(commit);
5871 				break;
5872 			}
5873 			/* Check if path history ends here. */
5874 			err = got_object_open_as_commit(&pcommit,
5875 			    s->repo, &pid->id);
5876 			if (err)
5877 				break;
5878 			err = got_object_id_by_path(&blob_id, s->repo,
5879 			    pcommit, s->path);
5880 			got_object_commit_close(pcommit);
5881 			if (err) {
5882 				if (err->code == GOT_ERR_NO_TREE_ENTRY)
5883 					err = NULL;
5884 				got_object_commit_close(commit);
5885 				break;
5886 			}
5887 			err = got_object_get_type(&obj_type, s->repo,
5888 			    blob_id);
5889 			free(blob_id);
5890 			/* Can't blame non-blob type objects. */
5891 			if (obj_type != GOT_OBJ_TYPE_BLOB) {
5892 				got_object_commit_close(commit);
5893 				break;
5894 			}
5895 			err = got_object_qid_alloc(&s->blamed_commit,
5896 			    &pid->id);
5897 			got_object_commit_close(commit);
5898 		} else {
5899 			if (got_object_id_cmp(id,
5900 			    &s->blamed_commit->id) == 0)
5901 				break;
5902 			err = got_object_qid_alloc(&s->blamed_commit,
5903 			    id);
5904 		}
5905 		if (err)
5906 			break;
5907 		s->done = 1;
5908 		thread_err = stop_blame(&s->blame);
5909 		s->done = 0;
5910 		if (thread_err)
5911 			break;
5912 		STAILQ_INSERT_HEAD(&s->blamed_commits,
5913 		    s->blamed_commit, entry);
5914 		err = run_blame(view);
5915 		if (err)
5916 			break;
5917 		break;
5918 	}
5919 	case 'C': {
5920 		struct got_object_qid *first;
5921 
5922 		view->count = 0;
5923 		first = STAILQ_FIRST(&s->blamed_commits);
5924 		if (!got_object_id_cmp(&first->id, s->commit_id))
5925 			break;
5926 		s->done = 1;
5927 		thread_err = stop_blame(&s->blame);
5928 		s->done = 0;
5929 		if (thread_err)
5930 			break;
5931 		STAILQ_REMOVE_HEAD(&s->blamed_commits, entry);
5932 		got_object_qid_free(s->blamed_commit);
5933 		s->blamed_commit =
5934 		    STAILQ_FIRST(&s->blamed_commits);
5935 		err = run_blame(view);
5936 		if (err)
5937 			break;
5938 		break;
5939 	}
5940 	case 'L': {
5941 		struct got_object_id *id = NULL;
5942 
5943 		view->count = 0;
5944 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5945 		    s->first_displayed_line, s->selected_line);
5946 		if (id == NULL)
5947 			break;
5948 
5949 		if (view_is_parent_view(view))
5950 			view_get_split(view, &begin_y, &begin_x);
5951 		err = log_annotated_line(&log_view, begin_y, begin_x,
5952 		    s->repo, id);
5953 		if (err)
5954 			break;
5955 		if (view_is_parent_view(view) &&
5956 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
5957 			err = view_init_hsplit(view, begin_y);
5958 			if (err)
5959 				break;
5960 		}
5961 
5962 		view->focussed = 0;
5963 		log_view->focussed = 1;
5964 		log_view->mode = view->mode;
5965 		log_view->nlines = view->lines - begin_y;
5966 		if (view_is_parent_view(view)) {
5967 			view_transfer_size(log_view, view);
5968 			err = view_close_child(view);
5969 			if (err)
5970 				return err;
5971 			err = view_set_child(view, log_view);
5972 			if (err)
5973 				return err;
5974 			view->focus_child = 1;
5975 		} else
5976 			*new_view = log_view;
5977 		break;
5978 	}
5979 	case KEY_ENTER:
5980 	case '\r': {
5981 		struct got_object_id *id = NULL;
5982 		struct got_object_qid *pid;
5983 		struct got_commit_object *commit = NULL;
5984 
5985 		view->count = 0;
5986 		id = get_selected_commit_id(s->blame.lines, s->blame.nlines,
5987 		    s->first_displayed_line, s->selected_line);
5988 		if (id == NULL)
5989 			break;
5990 		err = got_object_open_as_commit(&commit, s->repo, id);
5991 		if (err)
5992 			break;
5993 		pid = STAILQ_FIRST(got_object_commit_get_parent_ids(commit));
5994 		if (*new_view) {
5995 			/* traversed from diff view, release diff resources  */
5996 			err = close_diff_view(*new_view);
5997 			if (err)
5998 				break;
5999 			diff_view = *new_view;
6000 		} else {
6001 			if (view_is_parent_view(view))
6002 				view_get_split(view, &begin_y, &begin_x);
6003 
6004 			diff_view = view_open(0, 0, begin_y, begin_x,
6005 			    TOG_VIEW_DIFF);
6006 			if (diff_view == NULL) {
6007 				got_object_commit_close(commit);
6008 				err = got_error_from_errno("view_open");
6009 				break;
6010 			}
6011 		}
6012 		err = open_diff_view(diff_view, pid ? &pid->id : NULL,
6013 		    id, NULL, NULL, 3, 0, 0, view, s->repo);
6014 		got_object_commit_close(commit);
6015 		if (err) {
6016 			view_close(diff_view);
6017 			break;
6018 		}
6019 		s->last_diffed_line = s->first_displayed_line - 1 +
6020 		    s->selected_line;
6021 		if (*new_view)
6022 			break;	/* still open from active diff view */
6023 		if (view_is_parent_view(view) &&
6024 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6025 			err = view_init_hsplit(view, begin_y);
6026 			if (err)
6027 				break;
6028 		}
6029 
6030 		view->focussed = 0;
6031 		diff_view->focussed = 1;
6032 		diff_view->mode = view->mode;
6033 		diff_view->nlines = view->lines - begin_y;
6034 		if (view_is_parent_view(view)) {
6035 			view_transfer_size(diff_view, view);
6036 			err = view_close_child(view);
6037 			if (err)
6038 				break;
6039 			err = view_set_child(view, diff_view);
6040 			if (err)
6041 				break;
6042 			view->focus_child = 1;
6043 		} else
6044 			*new_view = diff_view;
6045 		if (err)
6046 			break;
6047 		break;
6048 	}
6049 	case CTRL('d'):
6050 	case 'd':
6051 		nscroll /= 2;
6052 		/* FALL THROUGH */
6053 	case KEY_NPAGE:
6054 	case CTRL('f'):
6055 	case 'f':
6056 	case ' ':
6057 		if (s->last_displayed_line >= s->blame.nlines &&
6058 		    s->selected_line >= MIN(s->blame.nlines,
6059 		    view->nlines - 2)) {
6060 			view->count = 0;
6061 			break;
6062 		}
6063 		if (s->last_displayed_line >= s->blame.nlines &&
6064 		    s->selected_line < view->nlines - 2) {
6065 			s->selected_line +=
6066 			    MIN(nscroll, s->last_displayed_line -
6067 			    s->first_displayed_line - s->selected_line + 1);
6068 		}
6069 		if (s->last_displayed_line + nscroll <= s->blame.nlines)
6070 			s->first_displayed_line += nscroll;
6071 		else
6072 			s->first_displayed_line =
6073 			    s->blame.nlines - (view->nlines - 3);
6074 		break;
6075 	case KEY_RESIZE:
6076 		if (s->selected_line > view->nlines - 2) {
6077 			s->selected_line = MIN(s->blame.nlines,
6078 			    view->nlines - 2);
6079 		}
6080 		break;
6081 	default:
6082 		view->count = 0;
6083 		break;
6084 	}
6085 	return thread_err ? thread_err : err;
6086 }
6087 
6088 static const struct got_error *
6089 reset_blame_view(struct tog_view *view)
6090 {
6091 	const struct got_error *err;
6092 	struct tog_blame_view_state *s = &view->state.blame;
6093 
6094 	view->count = 0;
6095 	s->done = 1;
6096 	err = stop_blame(&s->blame);
6097 	s->done = 0;
6098 	if (err)
6099 		return err;
6100 	return run_blame(view);
6101 }
6102 
6103 static const struct got_error *
6104 cmd_blame(int argc, char *argv[])
6105 {
6106 	const struct got_error *error;
6107 	struct got_repository *repo = NULL;
6108 	struct got_worktree *worktree = NULL;
6109 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
6110 	char *link_target = NULL;
6111 	struct got_object_id *commit_id = NULL;
6112 	struct got_commit_object *commit = NULL;
6113 	char *commit_id_str = NULL;
6114 	int ch;
6115 	struct tog_view *view;
6116 	int *pack_fds = NULL;
6117 
6118 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
6119 		switch (ch) {
6120 		case 'c':
6121 			commit_id_str = optarg;
6122 			break;
6123 		case 'r':
6124 			repo_path = realpath(optarg, NULL);
6125 			if (repo_path == NULL)
6126 				return got_error_from_errno2("realpath",
6127 				    optarg);
6128 			break;
6129 		default:
6130 			usage_blame();
6131 			/* NOTREACHED */
6132 		}
6133 	}
6134 
6135 	argc -= optind;
6136 	argv += optind;
6137 
6138 	if (argc != 1)
6139 		usage_blame();
6140 
6141 	error = got_repo_pack_fds_open(&pack_fds);
6142 	if (error != NULL)
6143 		goto done;
6144 
6145 	if (repo_path == NULL) {
6146 		cwd = getcwd(NULL, 0);
6147 		if (cwd == NULL)
6148 			return got_error_from_errno("getcwd");
6149 		error = got_worktree_open(&worktree, cwd);
6150 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
6151 			goto done;
6152 		if (worktree)
6153 			repo_path =
6154 			    strdup(got_worktree_get_repo_path(worktree));
6155 		else
6156 			repo_path = strdup(cwd);
6157 		if (repo_path == NULL) {
6158 			error = got_error_from_errno("strdup");
6159 			goto done;
6160 		}
6161 	}
6162 
6163 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
6164 	if (error != NULL)
6165 		goto done;
6166 
6167 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv, repo,
6168 	    worktree);
6169 	if (error)
6170 		goto done;
6171 
6172 	init_curses();
6173 
6174 	error = apply_unveil(got_repo_get_path(repo), NULL);
6175 	if (error)
6176 		goto done;
6177 
6178 	error = tog_load_refs(repo, 0);
6179 	if (error)
6180 		goto done;
6181 
6182 	if (commit_id_str == NULL) {
6183 		struct got_reference *head_ref;
6184 		error = got_ref_open(&head_ref, repo, worktree ?
6185 		    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD, 0);
6186 		if (error != NULL)
6187 			goto done;
6188 		error = got_ref_resolve(&commit_id, repo, head_ref);
6189 		got_ref_close(head_ref);
6190 	} else {
6191 		error = got_repo_match_object_id(&commit_id, NULL,
6192 		    commit_id_str, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
6193 	}
6194 	if (error != NULL)
6195 		goto done;
6196 
6197 	view = view_open(0, 0, 0, 0, TOG_VIEW_BLAME);
6198 	if (view == NULL) {
6199 		error = got_error_from_errno("view_open");
6200 		goto done;
6201 	}
6202 
6203 	error = got_object_open_as_commit(&commit, repo, commit_id);
6204 	if (error)
6205 		goto done;
6206 
6207 	error = got_object_resolve_symlinks(&link_target, in_repo_path,
6208 	    commit, repo);
6209 	if (error)
6210 		goto done;
6211 
6212 	error = open_blame_view(view, link_target ? link_target : in_repo_path,
6213 	    commit_id, repo);
6214 	if (error)
6215 		goto done;
6216 	if (worktree) {
6217 		/* Release work tree lock. */
6218 		got_worktree_close(worktree);
6219 		worktree = NULL;
6220 	}
6221 	error = view_loop(view);
6222 done:
6223 	free(repo_path);
6224 	free(in_repo_path);
6225 	free(link_target);
6226 	free(cwd);
6227 	free(commit_id);
6228 	if (commit)
6229 		got_object_commit_close(commit);
6230 	if (worktree)
6231 		got_worktree_close(worktree);
6232 	if (repo) {
6233 		const struct got_error *close_err = got_repo_close(repo);
6234 		if (error == NULL)
6235 			error = close_err;
6236 	}
6237 	if (pack_fds) {
6238 		const struct got_error *pack_err =
6239 		    got_repo_pack_fds_close(pack_fds);
6240 		if (error == NULL)
6241 			error = pack_err;
6242 	}
6243 	tog_free_refs();
6244 	return error;
6245 }
6246 
6247 static const struct got_error *
6248 draw_tree_entries(struct tog_view *view, const char *parent_path)
6249 {
6250 	struct tog_tree_view_state *s = &view->state.tree;
6251 	const struct got_error *err = NULL;
6252 	struct got_tree_entry *te;
6253 	wchar_t *wline;
6254 	struct tog_color *tc;
6255 	int width, n, i, nentries;
6256 	int limit = view->nlines;
6257 
6258 	s->ndisplayed = 0;
6259 	if (view_is_hsplit_top(view))
6260 		--limit;  /* border */
6261 
6262 	werase(view->window);
6263 
6264 	if (limit == 0)
6265 		return NULL;
6266 
6267 	err = format_line(&wline, &width, NULL, s->tree_label, 0, view->ncols,
6268 	    0, 0);
6269 	if (err)
6270 		return err;
6271 	if (view_needs_focus_indication(view))
6272 		wstandout(view->window);
6273 	tc = get_color(&s->colors, TOG_COLOR_COMMIT);
6274 	if (tc)
6275 		wattr_on(view->window,
6276 		    COLOR_PAIR(tc->colorpair), NULL);
6277 	waddwstr(view->window, wline);
6278 	if (tc)
6279 		wattr_off(view->window,
6280 		    COLOR_PAIR(tc->colorpair), NULL);
6281 	if (view_needs_focus_indication(view))
6282 		wstandend(view->window);
6283 	free(wline);
6284 	wline = NULL;
6285 	if (width < view->ncols - 1)
6286 		waddch(view->window, '\n');
6287 	if (--limit <= 0)
6288 		return NULL;
6289 	err = format_line(&wline, &width, NULL, parent_path, 0, view->ncols,
6290 	    0, 0);
6291 	if (err)
6292 		return err;
6293 	waddwstr(view->window, wline);
6294 	free(wline);
6295 	wline = NULL;
6296 	if (width < view->ncols - 1)
6297 		waddch(view->window, '\n');
6298 	if (--limit <= 0)
6299 		return NULL;
6300 	waddch(view->window, '\n');
6301 	if (--limit <= 0)
6302 		return NULL;
6303 
6304 	if (s->first_displayed_entry == NULL) {
6305 		te = got_object_tree_get_first_entry(s->tree);
6306 		if (s->selected == 0) {
6307 			if (view->focussed)
6308 				wstandout(view->window);
6309 			s->selected_entry = NULL;
6310 		}
6311 		waddstr(view->window, "  ..\n");	/* parent directory */
6312 		if (s->selected == 0 && view->focussed)
6313 			wstandend(view->window);
6314 		s->ndisplayed++;
6315 		if (--limit <= 0)
6316 			return NULL;
6317 		n = 1;
6318 	} else {
6319 		n = 0;
6320 		te = s->first_displayed_entry;
6321 	}
6322 
6323 	nentries = got_object_tree_get_nentries(s->tree);
6324 	for (i = got_tree_entry_get_index(te); i < nentries; i++) {
6325 		char *line = NULL, *id_str = NULL, *link_target = NULL;
6326 		const char *modestr = "";
6327 		mode_t mode;
6328 
6329 		te = got_object_tree_get_entry(s->tree, i);
6330 		mode = got_tree_entry_get_mode(te);
6331 
6332 		if (s->show_ids) {
6333 			err = got_object_id_str(&id_str,
6334 			    got_tree_entry_get_id(te));
6335 			if (err)
6336 				return got_error_from_errno(
6337 				    "got_object_id_str");
6338 		}
6339 		if (got_object_tree_entry_is_submodule(te))
6340 			modestr = "$";
6341 		else if (S_ISLNK(mode)) {
6342 			int i;
6343 
6344 			err = got_tree_entry_get_symlink_target(&link_target,
6345 			    te, s->repo);
6346 			if (err) {
6347 				free(id_str);
6348 				return err;
6349 			}
6350 			for (i = 0; i < strlen(link_target); i++) {
6351 				if (!isprint((unsigned char)link_target[i]))
6352 					link_target[i] = '?';
6353 			}
6354 			modestr = "@";
6355 		}
6356 		else if (S_ISDIR(mode))
6357 			modestr = "/";
6358 		else if (mode & S_IXUSR)
6359 			modestr = "*";
6360 		if (asprintf(&line, "%s  %s%s%s%s", id_str ? id_str : "",
6361 		    got_tree_entry_get_name(te), modestr,
6362 		    link_target ? " -> ": "",
6363 		    link_target ? link_target : "") == -1) {
6364 			free(id_str);
6365 			free(link_target);
6366 			return got_error_from_errno("asprintf");
6367 		}
6368 		free(id_str);
6369 		free(link_target);
6370 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
6371 		    0, 0);
6372 		if (err) {
6373 			free(line);
6374 			break;
6375 		}
6376 		if (n == s->selected) {
6377 			if (view->focussed)
6378 				wstandout(view->window);
6379 			s->selected_entry = te;
6380 		}
6381 		tc = match_color(&s->colors, line);
6382 		if (tc)
6383 			wattr_on(view->window,
6384 			    COLOR_PAIR(tc->colorpair), NULL);
6385 		waddwstr(view->window, wline);
6386 		if (tc)
6387 			wattr_off(view->window,
6388 			    COLOR_PAIR(tc->colorpair), NULL);
6389 		if (width < view->ncols - 1)
6390 			waddch(view->window, '\n');
6391 		if (n == s->selected && view->focussed)
6392 			wstandend(view->window);
6393 		free(line);
6394 		free(wline);
6395 		wline = NULL;
6396 		n++;
6397 		s->ndisplayed++;
6398 		s->last_displayed_entry = te;
6399 		if (--limit <= 0)
6400 			break;
6401 	}
6402 
6403 	return err;
6404 }
6405 
6406 static void
6407 tree_scroll_up(struct tog_tree_view_state *s, int maxscroll)
6408 {
6409 	struct got_tree_entry *te;
6410 	int isroot = s->tree == s->root;
6411 	int i = 0;
6412 
6413 	if (s->first_displayed_entry == NULL)
6414 		return;
6415 
6416 	te = got_tree_entry_get_prev(s->tree, s->first_displayed_entry);
6417 	while (i++ < maxscroll) {
6418 		if (te == NULL) {
6419 			if (!isroot)
6420 				s->first_displayed_entry = NULL;
6421 			break;
6422 		}
6423 		s->first_displayed_entry = te;
6424 		te = got_tree_entry_get_prev(s->tree, te);
6425 	}
6426 }
6427 
6428 static const struct got_error *
6429 tree_scroll_down(struct tog_view *view, int maxscroll)
6430 {
6431 	struct tog_tree_view_state *s = &view->state.tree;
6432 	struct got_tree_entry *next, *last;
6433 	int n = 0;
6434 
6435 	if (s->first_displayed_entry)
6436 		next = got_tree_entry_get_next(s->tree,
6437 		    s->first_displayed_entry);
6438 	else
6439 		next = got_object_tree_get_first_entry(s->tree);
6440 
6441 	last = s->last_displayed_entry;
6442 	while (next && n++ < maxscroll) {
6443 		if (last)
6444 			last = got_tree_entry_get_next(s->tree, last);
6445 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN && next)) {
6446 			s->first_displayed_entry = next;
6447 			next = got_tree_entry_get_next(s->tree, next);
6448 		}
6449 	}
6450 
6451 	return NULL;
6452 }
6453 
6454 static const struct got_error *
6455 tree_entry_path(char **path, struct tog_parent_trees *parents,
6456     struct got_tree_entry *te)
6457 {
6458 	const struct got_error *err = NULL;
6459 	struct tog_parent_tree *pt;
6460 	size_t len = 2; /* for leading slash and NUL */
6461 
6462 	TAILQ_FOREACH(pt, parents, entry)
6463 		len += strlen(got_tree_entry_get_name(pt->selected_entry))
6464 		    + 1 /* slash */;
6465 	if (te)
6466 		len += strlen(got_tree_entry_get_name(te));
6467 
6468 	*path = calloc(1, len);
6469 	if (path == NULL)
6470 		return got_error_from_errno("calloc");
6471 
6472 	(*path)[0] = '/';
6473 	pt = TAILQ_LAST(parents, tog_parent_trees);
6474 	while (pt) {
6475 		const char *name = got_tree_entry_get_name(pt->selected_entry);
6476 		if (strlcat(*path, name, len) >= len) {
6477 			err = got_error(GOT_ERR_NO_SPACE);
6478 			goto done;
6479 		}
6480 		if (strlcat(*path, "/", len) >= len) {
6481 			err = got_error(GOT_ERR_NO_SPACE);
6482 			goto done;
6483 		}
6484 		pt = TAILQ_PREV(pt, tog_parent_trees, entry);
6485 	}
6486 	if (te) {
6487 		if (strlcat(*path, got_tree_entry_get_name(te), len) >= len) {
6488 			err = got_error(GOT_ERR_NO_SPACE);
6489 			goto done;
6490 		}
6491 	}
6492 done:
6493 	if (err) {
6494 		free(*path);
6495 		*path = NULL;
6496 	}
6497 	return err;
6498 }
6499 
6500 static const struct got_error *
6501 blame_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6502     struct got_tree_entry *te, struct tog_parent_trees *parents,
6503     struct got_object_id *commit_id, struct got_repository *repo)
6504 {
6505 	const struct got_error *err = NULL;
6506 	char *path;
6507 	struct tog_view *blame_view;
6508 
6509 	*new_view = NULL;
6510 
6511 	err = tree_entry_path(&path, parents, te);
6512 	if (err)
6513 		return err;
6514 
6515 	blame_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_BLAME);
6516 	if (blame_view == NULL) {
6517 		err = got_error_from_errno("view_open");
6518 		goto done;
6519 	}
6520 
6521 	err = open_blame_view(blame_view, path, commit_id, repo);
6522 	if (err) {
6523 		if (err->code == GOT_ERR_CANCELLED)
6524 			err = NULL;
6525 		view_close(blame_view);
6526 	} else
6527 		*new_view = blame_view;
6528 done:
6529 	free(path);
6530 	return err;
6531 }
6532 
6533 static const struct got_error *
6534 log_selected_tree_entry(struct tog_view **new_view, int begin_y, int begin_x,
6535     struct tog_tree_view_state *s)
6536 {
6537 	struct tog_view *log_view;
6538 	const struct got_error *err = NULL;
6539 	char *path;
6540 
6541 	*new_view = NULL;
6542 
6543 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
6544 	if (log_view == NULL)
6545 		return got_error_from_errno("view_open");
6546 
6547 	err = tree_entry_path(&path, &s->parents, s->selected_entry);
6548 	if (err)
6549 		return err;
6550 
6551 	err = open_log_view(log_view, s->commit_id, s->repo, s->head_ref_name,
6552 	    path, 0);
6553 	if (err)
6554 		view_close(log_view);
6555 	else
6556 		*new_view = log_view;
6557 	free(path);
6558 	return err;
6559 }
6560 
6561 static const struct got_error *
6562 open_tree_view(struct tog_view *view, struct got_object_id *commit_id,
6563     const char *head_ref_name, struct got_repository *repo)
6564 {
6565 	const struct got_error *err = NULL;
6566 	char *commit_id_str = NULL;
6567 	struct tog_tree_view_state *s = &view->state.tree;
6568 	struct got_commit_object *commit = NULL;
6569 
6570 	TAILQ_INIT(&s->parents);
6571 	STAILQ_INIT(&s->colors);
6572 
6573 	s->commit_id = got_object_id_dup(commit_id);
6574 	if (s->commit_id == NULL)
6575 		return got_error_from_errno("got_object_id_dup");
6576 
6577 	err = got_object_open_as_commit(&commit, repo, commit_id);
6578 	if (err)
6579 		goto done;
6580 
6581 	/*
6582 	 * The root is opened here and will be closed when the view is closed.
6583 	 * Any visited subtrees and their path-wise parents are opened and
6584 	 * closed on demand.
6585 	 */
6586 	err = got_object_open_as_tree(&s->root, repo,
6587 	    got_object_commit_get_tree_id(commit));
6588 	if (err)
6589 		goto done;
6590 	s->tree = s->root;
6591 
6592 	err = got_object_id_str(&commit_id_str, commit_id);
6593 	if (err != NULL)
6594 		goto done;
6595 
6596 	if (asprintf(&s->tree_label, "commit %s", commit_id_str) == -1) {
6597 		err = got_error_from_errno("asprintf");
6598 		goto done;
6599 	}
6600 
6601 	s->first_displayed_entry = got_object_tree_get_entry(s->tree, 0);
6602 	s->selected_entry = got_object_tree_get_entry(s->tree, 0);
6603 	if (head_ref_name) {
6604 		s->head_ref_name = strdup(head_ref_name);
6605 		if (s->head_ref_name == NULL) {
6606 			err = got_error_from_errno("strdup");
6607 			goto done;
6608 		}
6609 	}
6610 	s->repo = repo;
6611 
6612 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
6613 		err = add_color(&s->colors, "\\$$",
6614 		    TOG_COLOR_TREE_SUBMODULE,
6615 		    get_color_value("TOG_COLOR_TREE_SUBMODULE"));
6616 		if (err)
6617 			goto done;
6618 		err = add_color(&s->colors, "@$", TOG_COLOR_TREE_SYMLINK,
6619 		    get_color_value("TOG_COLOR_TREE_SYMLINK"));
6620 		if (err)
6621 			goto done;
6622 		err = add_color(&s->colors, "/$",
6623 		    TOG_COLOR_TREE_DIRECTORY,
6624 		    get_color_value("TOG_COLOR_TREE_DIRECTORY"));
6625 		if (err)
6626 			goto done;
6627 
6628 		err = add_color(&s->colors, "\\*$",
6629 		    TOG_COLOR_TREE_EXECUTABLE,
6630 		    get_color_value("TOG_COLOR_TREE_EXECUTABLE"));
6631 		if (err)
6632 			goto done;
6633 
6634 		err = add_color(&s->colors, "^$", TOG_COLOR_COMMIT,
6635 		    get_color_value("TOG_COLOR_COMMIT"));
6636 		if (err)
6637 			goto done;
6638 	}
6639 
6640 	view->show = show_tree_view;
6641 	view->input = input_tree_view;
6642 	view->close = close_tree_view;
6643 	view->search_start = search_start_tree_view;
6644 	view->search_next = search_next_tree_view;
6645 done:
6646 	free(commit_id_str);
6647 	if (commit)
6648 		got_object_commit_close(commit);
6649 	if (err)
6650 		close_tree_view(view);
6651 	return err;
6652 }
6653 
6654 static const struct got_error *
6655 close_tree_view(struct tog_view *view)
6656 {
6657 	struct tog_tree_view_state *s = &view->state.tree;
6658 
6659 	free_colors(&s->colors);
6660 	free(s->tree_label);
6661 	s->tree_label = NULL;
6662 	free(s->commit_id);
6663 	s->commit_id = NULL;
6664 	free(s->head_ref_name);
6665 	s->head_ref_name = NULL;
6666 	while (!TAILQ_EMPTY(&s->parents)) {
6667 		struct tog_parent_tree *parent;
6668 		parent = TAILQ_FIRST(&s->parents);
6669 		TAILQ_REMOVE(&s->parents, parent, entry);
6670 		if (parent->tree != s->root)
6671 			got_object_tree_close(parent->tree);
6672 		free(parent);
6673 
6674 	}
6675 	if (s->tree != NULL && s->tree != s->root)
6676 		got_object_tree_close(s->tree);
6677 	if (s->root)
6678 		got_object_tree_close(s->root);
6679 	return NULL;
6680 }
6681 
6682 static const struct got_error *
6683 search_start_tree_view(struct tog_view *view)
6684 {
6685 	struct tog_tree_view_state *s = &view->state.tree;
6686 
6687 	s->matched_entry = NULL;
6688 	return NULL;
6689 }
6690 
6691 static int
6692 match_tree_entry(struct got_tree_entry *te, regex_t *regex)
6693 {
6694 	regmatch_t regmatch;
6695 
6696 	return regexec(regex, got_tree_entry_get_name(te), 1, &regmatch,
6697 	    0) == 0;
6698 }
6699 
6700 static const struct got_error *
6701 search_next_tree_view(struct tog_view *view)
6702 {
6703 	struct tog_tree_view_state *s = &view->state.tree;
6704 	struct got_tree_entry *te = NULL;
6705 
6706 	if (!view->searching) {
6707 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
6708 		return NULL;
6709 	}
6710 
6711 	if (s->matched_entry) {
6712 		if (view->searching == TOG_SEARCH_FORWARD) {
6713 			if (s->selected_entry)
6714 				te = got_tree_entry_get_next(s->tree,
6715 				    s->selected_entry);
6716 			else
6717 				te = got_object_tree_get_first_entry(s->tree);
6718 		} else {
6719 			if (s->selected_entry == NULL)
6720 				te = got_object_tree_get_last_entry(s->tree);
6721 			else
6722 				te = got_tree_entry_get_prev(s->tree,
6723 				    s->selected_entry);
6724 		}
6725 	} else {
6726 		if (s->selected_entry)
6727 			te = s->selected_entry;
6728 		else if (view->searching == TOG_SEARCH_FORWARD)
6729 			te = got_object_tree_get_first_entry(s->tree);
6730 		else
6731 			te = got_object_tree_get_last_entry(s->tree);
6732 	}
6733 
6734 	while (1) {
6735 		if (te == NULL) {
6736 			if (s->matched_entry == NULL) {
6737 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
6738 				return NULL;
6739 			}
6740 			if (view->searching == TOG_SEARCH_FORWARD)
6741 				te = got_object_tree_get_first_entry(s->tree);
6742 			else
6743 				te = got_object_tree_get_last_entry(s->tree);
6744 		}
6745 
6746 		if (match_tree_entry(te, &view->regex)) {
6747 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
6748 			s->matched_entry = te;
6749 			break;
6750 		}
6751 
6752 		if (view->searching == TOG_SEARCH_FORWARD)
6753 			te = got_tree_entry_get_next(s->tree, te);
6754 		else
6755 			te = got_tree_entry_get_prev(s->tree, te);
6756 	}
6757 
6758 	if (s->matched_entry) {
6759 		s->first_displayed_entry = s->matched_entry;
6760 		s->selected = 0;
6761 	}
6762 
6763 	return NULL;
6764 }
6765 
6766 static const struct got_error *
6767 show_tree_view(struct tog_view *view)
6768 {
6769 	const struct got_error *err = NULL;
6770 	struct tog_tree_view_state *s = &view->state.tree;
6771 	char *parent_path;
6772 
6773 	err = tree_entry_path(&parent_path, &s->parents, NULL);
6774 	if (err)
6775 		return err;
6776 
6777 	err = draw_tree_entries(view, parent_path);
6778 	free(parent_path);
6779 
6780 	view_border(view);
6781 	return err;
6782 }
6783 
6784 static const struct got_error *
6785 input_tree_view(struct tog_view **new_view, struct tog_view *view, int ch)
6786 {
6787 	const struct got_error *err = NULL;
6788 	struct tog_tree_view_state *s = &view->state.tree;
6789 	struct tog_view *log_view, *ref_view;
6790 	struct got_tree_entry *te;
6791 	int begin_y = 0, begin_x = 0, n, nscroll = view->nlines - 3;
6792 
6793 	switch (ch) {
6794 	case 'i':
6795 		s->show_ids = !s->show_ids;
6796 		view->count = 0;
6797 		break;
6798 	case 'l':
6799 		view->count = 0;
6800 		if (!s->selected_entry)
6801 			break;
6802 		if (view_is_parent_view(view))
6803 			view_get_split(view, &begin_y, &begin_x);
6804 		err = log_selected_tree_entry(&log_view, begin_y, begin_x, s);
6805 		if (view_is_parent_view(view) &&
6806 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6807 			err = view_init_hsplit(view, begin_y);
6808 			if (err)
6809 				break;
6810 		}
6811 		view->focussed = 0;
6812 		log_view->focussed = 1;
6813 		log_view->mode = view->mode;
6814 		log_view->nlines = view->lines - begin_y;
6815 		if (view_is_parent_view(view)) {
6816 			view_transfer_size(log_view, view);
6817 			err = view_close_child(view);
6818 			if (err)
6819 				return err;
6820 			err = view_set_child(view, log_view);
6821 			if (err)
6822 				return err;
6823 			view->focus_child = 1;
6824 		} else
6825 			*new_view = log_view;
6826 		break;
6827 	case 'r':
6828 		view->count = 0;
6829 		if (view_is_parent_view(view))
6830 			view_get_split(view, &begin_y, &begin_x);
6831 		ref_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_REF);
6832 		if (ref_view == NULL)
6833 			return got_error_from_errno("view_open");
6834 		err = open_ref_view(ref_view, s->repo);
6835 		if (err) {
6836 			view_close(ref_view);
6837 			return err;
6838 		}
6839 		if (view_is_parent_view(view) &&
6840 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
6841 			err = view_init_hsplit(view, begin_y);
6842 			if (err)
6843 				break;
6844 		}
6845 		view->focussed = 0;
6846 		ref_view->focussed = 1;
6847 		ref_view->mode = view->mode;
6848 		ref_view->nlines = view->lines - begin_y;
6849 		if (view_is_parent_view(view)) {
6850 			view_transfer_size(ref_view, view);
6851 			err = view_close_child(view);
6852 			if (err)
6853 				return err;
6854 			err = view_set_child(view, ref_view);
6855 			if (err)
6856 				return err;
6857 			view->focus_child = 1;
6858 		} else
6859 			*new_view = ref_view;
6860 		break;
6861 	case 'g':
6862 	case KEY_HOME:
6863 		s->selected = 0;
6864 		view->count = 0;
6865 		if (s->tree == s->root)
6866 			s->first_displayed_entry =
6867 			    got_object_tree_get_first_entry(s->tree);
6868 		else
6869 			s->first_displayed_entry = NULL;
6870 		break;
6871 	case 'G':
6872 	case KEY_END: {
6873 		int eos = view->nlines - 3;
6874 
6875 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
6876 			--eos;  /* border */
6877 		s->selected = 0;
6878 		view->count = 0;
6879 		te = got_object_tree_get_last_entry(s->tree);
6880 		for (n = 0; n < eos; n++) {
6881 			if (te == NULL) {
6882 				if (s->tree != s->root) {
6883 					s->first_displayed_entry = NULL;
6884 					n++;
6885 				}
6886 				break;
6887 			}
6888 			s->first_displayed_entry = te;
6889 			te = got_tree_entry_get_prev(s->tree, te);
6890 		}
6891 		if (n > 0)
6892 			s->selected = n - 1;
6893 		break;
6894 	}
6895 	case 'k':
6896 	case KEY_UP:
6897 	case CTRL('p'):
6898 		if (s->selected > 0) {
6899 			s->selected--;
6900 			break;
6901 		}
6902 		tree_scroll_up(s, 1);
6903 		if (s->selected_entry == NULL ||
6904 		    (s->tree == s->root && s->selected_entry ==
6905 		     got_object_tree_get_first_entry(s->tree)))
6906 			view->count = 0;
6907 		break;
6908 	case CTRL('u'):
6909 	case 'u':
6910 		nscroll /= 2;
6911 		/* FALL THROUGH */
6912 	case KEY_PPAGE:
6913 	case CTRL('b'):
6914 	case 'b':
6915 		if (s->tree == s->root) {
6916 			if (got_object_tree_get_first_entry(s->tree) ==
6917 			    s->first_displayed_entry)
6918 				s->selected -= MIN(s->selected, nscroll);
6919 		} else {
6920 			if (s->first_displayed_entry == NULL)
6921 				s->selected -= MIN(s->selected, nscroll);
6922 		}
6923 		tree_scroll_up(s, MAX(0, nscroll));
6924 		if (s->selected_entry == NULL ||
6925 		    (s->tree == s->root && s->selected_entry ==
6926 		     got_object_tree_get_first_entry(s->tree)))
6927 			view->count = 0;
6928 		break;
6929 	case 'j':
6930 	case KEY_DOWN:
6931 	case CTRL('n'):
6932 		if (s->selected < s->ndisplayed - 1) {
6933 			s->selected++;
6934 			break;
6935 		}
6936 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
6937 		    == NULL) {
6938 			/* can't scroll any further */
6939 			view->count = 0;
6940 			break;
6941 		}
6942 		tree_scroll_down(view, 1);
6943 		break;
6944 	case CTRL('d'):
6945 	case 'd':
6946 		nscroll /= 2;
6947 		/* FALL THROUGH */
6948 	case KEY_NPAGE:
6949 	case CTRL('f'):
6950 	case 'f':
6951 	case ' ':
6952 		if (got_tree_entry_get_next(s->tree, s->last_displayed_entry)
6953 		    == NULL) {
6954 			/* can't scroll any further; move cursor down */
6955 			if (s->selected < s->ndisplayed - 1)
6956 				s->selected += MIN(nscroll,
6957 				    s->ndisplayed - s->selected - 1);
6958 			else
6959 				view->count = 0;
6960 			break;
6961 		}
6962 		tree_scroll_down(view, nscroll);
6963 		break;
6964 	case KEY_ENTER:
6965 	case '\r':
6966 	case KEY_BACKSPACE:
6967 		if (s->selected_entry == NULL || ch == KEY_BACKSPACE) {
6968 			struct tog_parent_tree *parent;
6969 			/* user selected '..' */
6970 			if (s->tree == s->root) {
6971 				view->count = 0;
6972 				break;
6973 			}
6974 			parent = TAILQ_FIRST(&s->parents);
6975 			TAILQ_REMOVE(&s->parents, parent,
6976 			    entry);
6977 			got_object_tree_close(s->tree);
6978 			s->tree = parent->tree;
6979 			s->first_displayed_entry =
6980 			    parent->first_displayed_entry;
6981 			s->selected_entry =
6982 			    parent->selected_entry;
6983 			s->selected = parent->selected;
6984 			if (s->selected > view->nlines - 3) {
6985 				err = offset_selection_down(view);
6986 				if (err)
6987 					break;
6988 			}
6989 			free(parent);
6990 		} else if (S_ISDIR(got_tree_entry_get_mode(
6991 		    s->selected_entry))) {
6992 			struct got_tree_object *subtree;
6993 			view->count = 0;
6994 			err = got_object_open_as_tree(&subtree, s->repo,
6995 			    got_tree_entry_get_id(s->selected_entry));
6996 			if (err)
6997 				break;
6998 			err = tree_view_visit_subtree(s, subtree);
6999 			if (err) {
7000 				got_object_tree_close(subtree);
7001 				break;
7002 			}
7003 		} else if (S_ISREG(got_tree_entry_get_mode(
7004 		    s->selected_entry))) {
7005 			struct tog_view *blame_view;
7006 			int begin_x = 0, begin_y = 0;
7007 
7008 			if (view_is_parent_view(view))
7009 				view_get_split(view, &begin_y, &begin_x);
7010 
7011 			err = blame_tree_entry(&blame_view, begin_y, begin_x,
7012 			    s->selected_entry, &s->parents,
7013 			    s->commit_id, s->repo);
7014 			if (err)
7015 				break;
7016 
7017 			if (view_is_parent_view(view) &&
7018 			    view->mode == TOG_VIEW_SPLIT_HRZN) {
7019 				err = view_init_hsplit(view, begin_y);
7020 				if (err)
7021 					break;
7022 			}
7023 
7024 			view->count = 0;
7025 			view->focussed = 0;
7026 			blame_view->focussed = 1;
7027 			blame_view->mode = view->mode;
7028 			blame_view->nlines = view->lines - begin_y;
7029 			if (view_is_parent_view(view)) {
7030 				view_transfer_size(blame_view, view);
7031 				err = view_close_child(view);
7032 				if (err)
7033 					return err;
7034 				err = view_set_child(view, blame_view);
7035 				if (err)
7036 					return err;
7037 				view->focus_child = 1;
7038 			} else
7039 				*new_view = blame_view;
7040 		}
7041 		break;
7042 	case KEY_RESIZE:
7043 		if (view->nlines >= 4 && s->selected >= view->nlines - 3)
7044 			s->selected = view->nlines - 4;
7045 		view->count = 0;
7046 		break;
7047 	default:
7048 		view->count = 0;
7049 		break;
7050 	}
7051 
7052 	return err;
7053 }
7054 
7055 __dead static void
7056 usage_tree(void)
7057 {
7058 	endwin();
7059 	fprintf(stderr,
7060 	    "usage: %s tree [-c commit] [-r repository-path] [path]\n",
7061 	    getprogname());
7062 	exit(1);
7063 }
7064 
7065 static const struct got_error *
7066 cmd_tree(int argc, char *argv[])
7067 {
7068 	const struct got_error *error;
7069 	struct got_repository *repo = NULL;
7070 	struct got_worktree *worktree = NULL;
7071 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
7072 	struct got_object_id *commit_id = NULL;
7073 	struct got_commit_object *commit = NULL;
7074 	const char *commit_id_arg = NULL;
7075 	char *label = NULL;
7076 	struct got_reference *ref = NULL;
7077 	const char *head_ref_name = NULL;
7078 	int ch;
7079 	struct tog_view *view;
7080 	int *pack_fds = NULL;
7081 
7082 	while ((ch = getopt(argc, argv, "c:r:")) != -1) {
7083 		switch (ch) {
7084 		case 'c':
7085 			commit_id_arg = optarg;
7086 			break;
7087 		case 'r':
7088 			repo_path = realpath(optarg, NULL);
7089 			if (repo_path == NULL)
7090 				return got_error_from_errno2("realpath",
7091 				    optarg);
7092 			break;
7093 		default:
7094 			usage_tree();
7095 			/* NOTREACHED */
7096 		}
7097 	}
7098 
7099 	argc -= optind;
7100 	argv += optind;
7101 
7102 	if (argc > 1)
7103 		usage_tree();
7104 
7105 	error = got_repo_pack_fds_open(&pack_fds);
7106 	if (error != NULL)
7107 		goto done;
7108 
7109 	if (repo_path == NULL) {
7110 		cwd = getcwd(NULL, 0);
7111 		if (cwd == NULL)
7112 			return got_error_from_errno("getcwd");
7113 		error = got_worktree_open(&worktree, cwd);
7114 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7115 			goto done;
7116 		if (worktree)
7117 			repo_path =
7118 			    strdup(got_worktree_get_repo_path(worktree));
7119 		else
7120 			repo_path = strdup(cwd);
7121 		if (repo_path == NULL) {
7122 			error = got_error_from_errno("strdup");
7123 			goto done;
7124 		}
7125 	}
7126 
7127 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7128 	if (error != NULL)
7129 		goto done;
7130 
7131 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
7132 	    repo, worktree);
7133 	if (error)
7134 		goto done;
7135 
7136 	init_curses();
7137 
7138 	error = apply_unveil(got_repo_get_path(repo), NULL);
7139 	if (error)
7140 		goto done;
7141 
7142 	error = tog_load_refs(repo, 0);
7143 	if (error)
7144 		goto done;
7145 
7146 	if (commit_id_arg == NULL) {
7147 		error = got_repo_match_object_id(&commit_id, &label,
7148 		    worktree ? got_worktree_get_head_ref_name(worktree) :
7149 		    GOT_REF_HEAD, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7150 		if (error)
7151 			goto done;
7152 		head_ref_name = label;
7153 	} else {
7154 		error = got_ref_open(&ref, repo, commit_id_arg, 0);
7155 		if (error == NULL)
7156 			head_ref_name = got_ref_get_name(ref);
7157 		else if (error->code != GOT_ERR_NOT_REF)
7158 			goto done;
7159 		error = got_repo_match_object_id(&commit_id, NULL,
7160 		    commit_id_arg, GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
7161 		if (error)
7162 			goto done;
7163 	}
7164 
7165 	error = got_object_open_as_commit(&commit, repo, commit_id);
7166 	if (error)
7167 		goto done;
7168 
7169 	view = view_open(0, 0, 0, 0, TOG_VIEW_TREE);
7170 	if (view == NULL) {
7171 		error = got_error_from_errno("view_open");
7172 		goto done;
7173 	}
7174 	error = open_tree_view(view, commit_id, head_ref_name, repo);
7175 	if (error)
7176 		goto done;
7177 	if (!got_path_is_root_dir(in_repo_path)) {
7178 		error = tree_view_walk_path(&view->state.tree, commit,
7179 		    in_repo_path);
7180 		if (error)
7181 			goto done;
7182 	}
7183 
7184 	if (worktree) {
7185 		/* Release work tree lock. */
7186 		got_worktree_close(worktree);
7187 		worktree = NULL;
7188 	}
7189 	error = view_loop(view);
7190 done:
7191 	free(repo_path);
7192 	free(cwd);
7193 	free(commit_id);
7194 	free(label);
7195 	if (ref)
7196 		got_ref_close(ref);
7197 	if (repo) {
7198 		const struct got_error *close_err = got_repo_close(repo);
7199 		if (error == NULL)
7200 			error = close_err;
7201 	}
7202 	if (pack_fds) {
7203 		const struct got_error *pack_err =
7204 		    got_repo_pack_fds_close(pack_fds);
7205 		if (error == NULL)
7206 			error = pack_err;
7207 	}
7208 	tog_free_refs();
7209 	return error;
7210 }
7211 
7212 static const struct got_error *
7213 ref_view_load_refs(struct tog_ref_view_state *s)
7214 {
7215 	struct got_reflist_entry *sre;
7216 	struct tog_reflist_entry *re;
7217 
7218 	s->nrefs = 0;
7219 	TAILQ_FOREACH(sre, &tog_refs, entry) {
7220 		if (strncmp(got_ref_get_name(sre->ref),
7221 		    "refs/got/", 9) == 0 &&
7222 		    strncmp(got_ref_get_name(sre->ref),
7223 		    "refs/got/backup/", 16) != 0)
7224 			continue;
7225 
7226 		re = malloc(sizeof(*re));
7227 		if (re == NULL)
7228 			return got_error_from_errno("malloc");
7229 
7230 		re->ref = got_ref_dup(sre->ref);
7231 		if (re->ref == NULL)
7232 			return got_error_from_errno("got_ref_dup");
7233 		re->idx = s->nrefs++;
7234 		TAILQ_INSERT_TAIL(&s->refs, re, entry);
7235 	}
7236 
7237 	s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7238 	return NULL;
7239 }
7240 
7241 static void
7242 ref_view_free_refs(struct tog_ref_view_state *s)
7243 {
7244 	struct tog_reflist_entry *re;
7245 
7246 	while (!TAILQ_EMPTY(&s->refs)) {
7247 		re = TAILQ_FIRST(&s->refs);
7248 		TAILQ_REMOVE(&s->refs, re, entry);
7249 		got_ref_close(re->ref);
7250 		free(re);
7251 	}
7252 }
7253 
7254 static const struct got_error *
7255 open_ref_view(struct tog_view *view, struct got_repository *repo)
7256 {
7257 	const struct got_error *err = NULL;
7258 	struct tog_ref_view_state *s = &view->state.ref;
7259 
7260 	s->selected_entry = 0;
7261 	s->repo = repo;
7262 
7263 	TAILQ_INIT(&s->refs);
7264 	STAILQ_INIT(&s->colors);
7265 
7266 	err = ref_view_load_refs(s);
7267 	if (err)
7268 		return err;
7269 
7270 	if (has_colors() && getenv("TOG_COLORS") != NULL) {
7271 		err = add_color(&s->colors, "^refs/heads/",
7272 		    TOG_COLOR_REFS_HEADS,
7273 		    get_color_value("TOG_COLOR_REFS_HEADS"));
7274 		if (err)
7275 			goto done;
7276 
7277 		err = add_color(&s->colors, "^refs/tags/",
7278 		    TOG_COLOR_REFS_TAGS,
7279 		    get_color_value("TOG_COLOR_REFS_TAGS"));
7280 		if (err)
7281 			goto done;
7282 
7283 		err = add_color(&s->colors, "^refs/remotes/",
7284 		    TOG_COLOR_REFS_REMOTES,
7285 		    get_color_value("TOG_COLOR_REFS_REMOTES"));
7286 		if (err)
7287 			goto done;
7288 
7289 		err = add_color(&s->colors, "^refs/got/backup/",
7290 		    TOG_COLOR_REFS_BACKUP,
7291 		    get_color_value("TOG_COLOR_REFS_BACKUP"));
7292 		if (err)
7293 			goto done;
7294 	}
7295 
7296 	view->show = show_ref_view;
7297 	view->input = input_ref_view;
7298 	view->close = close_ref_view;
7299 	view->search_start = search_start_ref_view;
7300 	view->search_next = search_next_ref_view;
7301 done:
7302 	if (err)
7303 		free_colors(&s->colors);
7304 	return err;
7305 }
7306 
7307 static const struct got_error *
7308 close_ref_view(struct tog_view *view)
7309 {
7310 	struct tog_ref_view_state *s = &view->state.ref;
7311 
7312 	ref_view_free_refs(s);
7313 	free_colors(&s->colors);
7314 
7315 	return NULL;
7316 }
7317 
7318 static const struct got_error *
7319 resolve_reflist_entry(struct got_object_id **commit_id,
7320     struct tog_reflist_entry *re, struct got_repository *repo)
7321 {
7322 	const struct got_error *err = NULL;
7323 	struct got_object_id *obj_id;
7324 	struct got_tag_object *tag = NULL;
7325 	int obj_type;
7326 
7327 	*commit_id = NULL;
7328 
7329 	err = got_ref_resolve(&obj_id, repo, re->ref);
7330 	if (err)
7331 		return err;
7332 
7333 	err = got_object_get_type(&obj_type, repo, obj_id);
7334 	if (err)
7335 		goto done;
7336 
7337 	switch (obj_type) {
7338 	case GOT_OBJ_TYPE_COMMIT:
7339 		*commit_id = obj_id;
7340 		break;
7341 	case GOT_OBJ_TYPE_TAG:
7342 		err = got_object_open_as_tag(&tag, repo, obj_id);
7343 		if (err)
7344 			goto done;
7345 		free(obj_id);
7346 		err = got_object_get_type(&obj_type, repo,
7347 		    got_object_tag_get_object_id(tag));
7348 		if (err)
7349 			goto done;
7350 		if (obj_type != GOT_OBJ_TYPE_COMMIT) {
7351 			err = got_error(GOT_ERR_OBJ_TYPE);
7352 			goto done;
7353 		}
7354 		*commit_id = got_object_id_dup(
7355 		    got_object_tag_get_object_id(tag));
7356 		if (*commit_id == NULL) {
7357 			err = got_error_from_errno("got_object_id_dup");
7358 			goto done;
7359 		}
7360 		break;
7361 	default:
7362 		err = got_error(GOT_ERR_OBJ_TYPE);
7363 		break;
7364 	}
7365 
7366 done:
7367 	if (tag)
7368 		got_object_tag_close(tag);
7369 	if (err) {
7370 		free(*commit_id);
7371 		*commit_id = NULL;
7372 	}
7373 	return err;
7374 }
7375 
7376 static const struct got_error *
7377 log_ref_entry(struct tog_view **new_view, int begin_y, int begin_x,
7378     struct tog_reflist_entry *re, struct got_repository *repo)
7379 {
7380 	struct tog_view *log_view;
7381 	const struct got_error *err = NULL;
7382 	struct got_object_id *commit_id = NULL;
7383 
7384 	*new_view = NULL;
7385 
7386 	err = resolve_reflist_entry(&commit_id, re, repo);
7387 	if (err) {
7388 		if (err->code != GOT_ERR_OBJ_TYPE)
7389 			return err;
7390 		else
7391 			return NULL;
7392 	}
7393 
7394 	log_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_LOG);
7395 	if (log_view == NULL) {
7396 		err = got_error_from_errno("view_open");
7397 		goto done;
7398 	}
7399 
7400 	err = open_log_view(log_view, commit_id, repo,
7401 	    got_ref_get_name(re->ref), "", 0);
7402 done:
7403 	if (err)
7404 		view_close(log_view);
7405 	else
7406 		*new_view = log_view;
7407 	free(commit_id);
7408 	return err;
7409 }
7410 
7411 static void
7412 ref_scroll_up(struct tog_ref_view_state *s, int maxscroll)
7413 {
7414 	struct tog_reflist_entry *re;
7415 	int i = 0;
7416 
7417 	if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7418 		return;
7419 
7420 	re = TAILQ_PREV(s->first_displayed_entry, tog_reflist_head, entry);
7421 	while (i++ < maxscroll) {
7422 		if (re == NULL)
7423 			break;
7424 		s->first_displayed_entry = re;
7425 		re = TAILQ_PREV(re, tog_reflist_head, entry);
7426 	}
7427 }
7428 
7429 static const struct got_error *
7430 ref_scroll_down(struct tog_view *view, int maxscroll)
7431 {
7432 	struct tog_ref_view_state *s = &view->state.ref;
7433 	struct tog_reflist_entry *next, *last;
7434 	int n = 0;
7435 
7436 	if (s->first_displayed_entry)
7437 		next = TAILQ_NEXT(s->first_displayed_entry, entry);
7438 	else
7439 		next = TAILQ_FIRST(&s->refs);
7440 
7441 	last = s->last_displayed_entry;
7442 	while (next && n++ < maxscroll) {
7443 		if (last)
7444 			last = TAILQ_NEXT(last, entry);
7445 		if (last || (view->mode == TOG_VIEW_SPLIT_HRZN)) {
7446 			s->first_displayed_entry = next;
7447 			next = TAILQ_NEXT(next, entry);
7448 		}
7449 	}
7450 
7451 	return NULL;
7452 }
7453 
7454 static const struct got_error *
7455 search_start_ref_view(struct tog_view *view)
7456 {
7457 	struct tog_ref_view_state *s = &view->state.ref;
7458 
7459 	s->matched_entry = NULL;
7460 	return NULL;
7461 }
7462 
7463 static int
7464 match_reflist_entry(struct tog_reflist_entry *re, regex_t *regex)
7465 {
7466 	regmatch_t regmatch;
7467 
7468 	return regexec(regex, got_ref_get_name(re->ref), 1, &regmatch,
7469 	    0) == 0;
7470 }
7471 
7472 static const struct got_error *
7473 search_next_ref_view(struct tog_view *view)
7474 {
7475 	struct tog_ref_view_state *s = &view->state.ref;
7476 	struct tog_reflist_entry *re = NULL;
7477 
7478 	if (!view->searching) {
7479 		view->search_next_done = TOG_SEARCH_HAVE_MORE;
7480 		return NULL;
7481 	}
7482 
7483 	if (s->matched_entry) {
7484 		if (view->searching == TOG_SEARCH_FORWARD) {
7485 			if (s->selected_entry)
7486 				re = TAILQ_NEXT(s->selected_entry, entry);
7487 			else
7488 				re = TAILQ_PREV(s->selected_entry,
7489 				    tog_reflist_head, entry);
7490 		} else {
7491 			if (s->selected_entry == NULL)
7492 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7493 			else
7494 				re = TAILQ_PREV(s->selected_entry,
7495 				    tog_reflist_head, entry);
7496 		}
7497 	} else {
7498 		if (s->selected_entry)
7499 			re = s->selected_entry;
7500 		else if (view->searching == TOG_SEARCH_FORWARD)
7501 			re = TAILQ_FIRST(&s->refs);
7502 		else
7503 			re = TAILQ_LAST(&s->refs, tog_reflist_head);
7504 	}
7505 
7506 	while (1) {
7507 		if (re == NULL) {
7508 			if (s->matched_entry == NULL) {
7509 				view->search_next_done = TOG_SEARCH_HAVE_MORE;
7510 				return NULL;
7511 			}
7512 			if (view->searching == TOG_SEARCH_FORWARD)
7513 				re = TAILQ_FIRST(&s->refs);
7514 			else
7515 				re = TAILQ_LAST(&s->refs, tog_reflist_head);
7516 		}
7517 
7518 		if (match_reflist_entry(re, &view->regex)) {
7519 			view->search_next_done = TOG_SEARCH_HAVE_MORE;
7520 			s->matched_entry = re;
7521 			break;
7522 		}
7523 
7524 		if (view->searching == TOG_SEARCH_FORWARD)
7525 			re = TAILQ_NEXT(re, entry);
7526 		else
7527 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7528 	}
7529 
7530 	if (s->matched_entry) {
7531 		s->first_displayed_entry = s->matched_entry;
7532 		s->selected = 0;
7533 	}
7534 
7535 	return NULL;
7536 }
7537 
7538 static const struct got_error *
7539 show_ref_view(struct tog_view *view)
7540 {
7541 	const struct got_error *err = NULL;
7542 	struct tog_ref_view_state *s = &view->state.ref;
7543 	struct tog_reflist_entry *re;
7544 	char *line = NULL;
7545 	wchar_t *wline;
7546 	struct tog_color *tc;
7547 	int width, n;
7548 	int limit = view->nlines;
7549 
7550 	werase(view->window);
7551 
7552 	s->ndisplayed = 0;
7553 	if (view_is_hsplit_top(view))
7554 		--limit;  /* border */
7555 
7556 	if (limit == 0)
7557 		return NULL;
7558 
7559 	re = s->first_displayed_entry;
7560 
7561 	if (asprintf(&line, "references [%d/%d]", re->idx + s->selected + 1,
7562 	    s->nrefs) == -1)
7563 		return got_error_from_errno("asprintf");
7564 
7565 	err = format_line(&wline, &width, NULL, line, 0, view->ncols, 0, 0);
7566 	if (err) {
7567 		free(line);
7568 		return err;
7569 	}
7570 	if (view_needs_focus_indication(view))
7571 		wstandout(view->window);
7572 	waddwstr(view->window, wline);
7573 	if (view_needs_focus_indication(view))
7574 		wstandend(view->window);
7575 	free(wline);
7576 	wline = NULL;
7577 	free(line);
7578 	line = NULL;
7579 	if (width < view->ncols - 1)
7580 		waddch(view->window, '\n');
7581 	if (--limit <= 0)
7582 		return NULL;
7583 
7584 	n = 0;
7585 	while (re && limit > 0) {
7586 		char *line = NULL;
7587 		char ymd[13];  /* YYYY-MM-DD + "  " + NUL */
7588 
7589 		if (s->show_date) {
7590 			struct got_commit_object *ci;
7591 			struct got_tag_object *tag;
7592 			struct got_object_id *id;
7593 			struct tm tm;
7594 			time_t t;
7595 
7596 			err = got_ref_resolve(&id, s->repo, re->ref);
7597 			if (err)
7598 				return err;
7599 			err = got_object_open_as_tag(&tag, s->repo, id);
7600 			if (err) {
7601 				if (err->code != GOT_ERR_OBJ_TYPE) {
7602 					free(id);
7603 					return err;
7604 				}
7605 				err = got_object_open_as_commit(&ci, s->repo,
7606 				    id);
7607 				if (err) {
7608 					free(id);
7609 					return err;
7610 				}
7611 				t = got_object_commit_get_committer_time(ci);
7612 				got_object_commit_close(ci);
7613 			} else {
7614 				t = got_object_tag_get_tagger_time(tag);
7615 				got_object_tag_close(tag);
7616 			}
7617 			free(id);
7618 			if (gmtime_r(&t, &tm) == NULL)
7619 				return got_error_from_errno("gmtime_r");
7620 			if (strftime(ymd, sizeof(ymd), "%G-%m-%d  ", &tm) == 0)
7621 				return got_error(GOT_ERR_NO_SPACE);
7622 		}
7623 		if (got_ref_is_symbolic(re->ref)) {
7624 			if (asprintf(&line, "%s%s -> %s", s->show_date ?
7625 			    ymd : "", got_ref_get_name(re->ref),
7626 			    got_ref_get_symref_target(re->ref)) == -1)
7627 				return got_error_from_errno("asprintf");
7628 		} else if (s->show_ids) {
7629 			struct got_object_id *id;
7630 			char *id_str;
7631 			err = got_ref_resolve(&id, s->repo, re->ref);
7632 			if (err)
7633 				return err;
7634 			err = got_object_id_str(&id_str, id);
7635 			if (err) {
7636 				free(id);
7637 				return err;
7638 			}
7639 			if (asprintf(&line, "%s%s: %s", s->show_date ? ymd : "",
7640 			    got_ref_get_name(re->ref), id_str) == -1) {
7641 				err = got_error_from_errno("asprintf");
7642 				free(id);
7643 				free(id_str);
7644 				return err;
7645 			}
7646 			free(id);
7647 			free(id_str);
7648 		} else if (asprintf(&line, "%s%s", s->show_date ? ymd : "",
7649 		    got_ref_get_name(re->ref)) == -1)
7650 			return got_error_from_errno("asprintf");
7651 
7652 		err = format_line(&wline, &width, NULL, line, 0, view->ncols,
7653 		    0, 0);
7654 		if (err) {
7655 			free(line);
7656 			return err;
7657 		}
7658 		if (n == s->selected) {
7659 			if (view->focussed)
7660 				wstandout(view->window);
7661 			s->selected_entry = re;
7662 		}
7663 		tc = match_color(&s->colors, got_ref_get_name(re->ref));
7664 		if (tc)
7665 			wattr_on(view->window,
7666 			    COLOR_PAIR(tc->colorpair), NULL);
7667 		waddwstr(view->window, wline);
7668 		if (tc)
7669 			wattr_off(view->window,
7670 			    COLOR_PAIR(tc->colorpair), NULL);
7671 		if (width < view->ncols - 1)
7672 			waddch(view->window, '\n');
7673 		if (n == s->selected && view->focussed)
7674 			wstandend(view->window);
7675 		free(line);
7676 		free(wline);
7677 		wline = NULL;
7678 		n++;
7679 		s->ndisplayed++;
7680 		s->last_displayed_entry = re;
7681 
7682 		limit--;
7683 		re = TAILQ_NEXT(re, entry);
7684 	}
7685 
7686 	view_border(view);
7687 	return err;
7688 }
7689 
7690 static const struct got_error *
7691 browse_ref_tree(struct tog_view **new_view, int begin_y, int begin_x,
7692     struct tog_reflist_entry *re, struct got_repository *repo)
7693 {
7694 	const struct got_error *err = NULL;
7695 	struct got_object_id *commit_id = NULL;
7696 	struct tog_view *tree_view;
7697 
7698 	*new_view = NULL;
7699 
7700 	err = resolve_reflist_entry(&commit_id, re, repo);
7701 	if (err) {
7702 		if (err->code != GOT_ERR_OBJ_TYPE)
7703 			return err;
7704 		else
7705 			return NULL;
7706 	}
7707 
7708 
7709 	tree_view = view_open(0, 0, begin_y, begin_x, TOG_VIEW_TREE);
7710 	if (tree_view == NULL) {
7711 		err = got_error_from_errno("view_open");
7712 		goto done;
7713 	}
7714 
7715 	err = open_tree_view(tree_view, commit_id,
7716 	    got_ref_get_name(re->ref), repo);
7717 	if (err)
7718 		goto done;
7719 
7720 	*new_view = tree_view;
7721 done:
7722 	free(commit_id);
7723 	return err;
7724 }
7725 static const struct got_error *
7726 input_ref_view(struct tog_view **new_view, struct tog_view *view, int ch)
7727 {
7728 	const struct got_error *err = NULL;
7729 	struct tog_ref_view_state *s = &view->state.ref;
7730 	struct tog_view *log_view, *tree_view;
7731 	struct tog_reflist_entry *re;
7732 	int begin_y = 0, begin_x = 0, n, nscroll = view->nlines - 1;
7733 
7734 	switch (ch) {
7735 	case 'i':
7736 		s->show_ids = !s->show_ids;
7737 		view->count = 0;
7738 		break;
7739 	case 'm':
7740 		s->show_date = !s->show_date;
7741 		view->count = 0;
7742 		break;
7743 	case 'o':
7744 		s->sort_by_date = !s->sort_by_date;
7745 		view->count = 0;
7746 		err = got_reflist_sort(&tog_refs, s->sort_by_date ?
7747 		    got_ref_cmp_by_commit_timestamp_descending :
7748 		    tog_ref_cmp_by_name, s->repo);
7749 		if (err)
7750 			break;
7751 		got_reflist_object_id_map_free(tog_refs_idmap);
7752 		err = got_reflist_object_id_map_create(&tog_refs_idmap,
7753 		    &tog_refs, s->repo);
7754 		if (err)
7755 			break;
7756 		ref_view_free_refs(s);
7757 		err = ref_view_load_refs(s);
7758 		break;
7759 	case KEY_ENTER:
7760 	case '\r':
7761 		view->count = 0;
7762 		if (!s->selected_entry)
7763 			break;
7764 		if (view_is_parent_view(view))
7765 			view_get_split(view, &begin_y, &begin_x);
7766 
7767 		err = log_ref_entry(&log_view, begin_y, begin_x,
7768 		    s->selected_entry, s->repo);
7769 		if (err)
7770 			break;
7771 
7772 		if (view_is_parent_view(view) &&
7773 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
7774 			err = view_init_hsplit(view, begin_y);
7775 			if (err)
7776 				break;
7777 		}
7778 
7779 		view->focussed = 0;
7780 		log_view->focussed = 1;
7781 		log_view->mode = view->mode;
7782 		log_view->nlines = view->lines - begin_y;
7783 		if (view_is_parent_view(view)) {
7784 			view_transfer_size(log_view, view);
7785 			err = view_close_child(view);
7786 			if (err)
7787 				return err;
7788 			err = view_set_child(view, log_view);
7789 			if (err)
7790 				return err;
7791 			view->focus_child = 1;
7792 		} else
7793 			*new_view = log_view;
7794 		break;
7795 	case 't':
7796 		view->count = 0;
7797 		if (!s->selected_entry)
7798 			break;
7799 		if (view_is_parent_view(view))
7800 			view_get_split(view, &begin_y, &begin_x);
7801 		err = browse_ref_tree(&tree_view, begin_y, begin_x,
7802 		    s->selected_entry, s->repo);
7803 		if (err || tree_view == NULL)
7804 			break;
7805 		if (view_is_parent_view(view) &&
7806 		    view->mode == TOG_VIEW_SPLIT_HRZN) {
7807 			err = view_init_hsplit(view, begin_y);
7808 			if (err)
7809 				break;
7810 		}
7811 		view->focussed = 0;
7812 		tree_view->focussed = 1;
7813 		tree_view->mode = view->mode;
7814 		tree_view->nlines = view->lines - begin_y;
7815 		if (view_is_parent_view(view)) {
7816 			view_transfer_size(tree_view, view);
7817 			err = view_close_child(view);
7818 			if (err)
7819 				return err;
7820 			err = view_set_child(view, tree_view);
7821 			if (err)
7822 				return err;
7823 			view->focus_child = 1;
7824 		} else
7825 			*new_view = tree_view;
7826 		break;
7827 	case 'g':
7828 	case KEY_HOME:
7829 		s->selected = 0;
7830 		view->count = 0;
7831 		s->first_displayed_entry = TAILQ_FIRST(&s->refs);
7832 		break;
7833 	case 'G':
7834 	case KEY_END: {
7835 		int eos = view->nlines - 1;
7836 
7837 		if (view->mode == TOG_VIEW_SPLIT_HRZN)
7838 			--eos;  /* border */
7839 		s->selected = 0;
7840 		view->count = 0;
7841 		re = TAILQ_LAST(&s->refs, tog_reflist_head);
7842 		for (n = 0; n < eos; n++) {
7843 			if (re == NULL)
7844 				break;
7845 			s->first_displayed_entry = re;
7846 			re = TAILQ_PREV(re, tog_reflist_head, entry);
7847 		}
7848 		if (n > 0)
7849 			s->selected = n - 1;
7850 		break;
7851 	}
7852 	case 'k':
7853 	case KEY_UP:
7854 	case CTRL('p'):
7855 		if (s->selected > 0) {
7856 			s->selected--;
7857 			break;
7858 		}
7859 		ref_scroll_up(s, 1);
7860 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7861 			view->count = 0;
7862 		break;
7863 	case CTRL('u'):
7864 	case 'u':
7865 		nscroll /= 2;
7866 		/* FALL THROUGH */
7867 	case KEY_PPAGE:
7868 	case CTRL('b'):
7869 	case 'b':
7870 		if (s->first_displayed_entry == TAILQ_FIRST(&s->refs))
7871 			s->selected -= MIN(nscroll, s->selected);
7872 		ref_scroll_up(s, MAX(0, nscroll));
7873 		if (s->selected_entry == TAILQ_FIRST(&s->refs))
7874 			view->count = 0;
7875 		break;
7876 	case 'j':
7877 	case KEY_DOWN:
7878 	case CTRL('n'):
7879 		if (s->selected < s->ndisplayed - 1) {
7880 			s->selected++;
7881 			break;
7882 		}
7883 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7884 			/* can't scroll any further */
7885 			view->count = 0;
7886 			break;
7887 		}
7888 		ref_scroll_down(view, 1);
7889 		break;
7890 	case CTRL('d'):
7891 	case 'd':
7892 		nscroll /= 2;
7893 		/* FALL THROUGH */
7894 	case KEY_NPAGE:
7895 	case CTRL('f'):
7896 	case 'f':
7897 	case ' ':
7898 		if (TAILQ_NEXT(s->last_displayed_entry, entry) == NULL) {
7899 			/* can't scroll any further; move cursor down */
7900 			if (s->selected < s->ndisplayed - 1)
7901 				s->selected += MIN(nscroll,
7902 				    s->ndisplayed - s->selected - 1);
7903 			if (view->count > 1 && s->selected < s->ndisplayed - 1)
7904 				s->selected += s->ndisplayed - s->selected - 1;
7905 			view->count = 0;
7906 			break;
7907 		}
7908 		ref_scroll_down(view, nscroll);
7909 		break;
7910 	case CTRL('l'):
7911 		view->count = 0;
7912 		tog_free_refs();
7913 		err = tog_load_refs(s->repo, s->sort_by_date);
7914 		if (err)
7915 			break;
7916 		ref_view_free_refs(s);
7917 		err = ref_view_load_refs(s);
7918 		break;
7919 	case KEY_RESIZE:
7920 		if (view->nlines >= 2 && s->selected >= view->nlines - 1)
7921 			s->selected = view->nlines - 2;
7922 		break;
7923 	default:
7924 		view->count = 0;
7925 		break;
7926 	}
7927 
7928 	return err;
7929 }
7930 
7931 __dead static void
7932 usage_ref(void)
7933 {
7934 	endwin();
7935 	fprintf(stderr, "usage: %s ref [-r repository-path]\n",
7936 	    getprogname());
7937 	exit(1);
7938 }
7939 
7940 static const struct got_error *
7941 cmd_ref(int argc, char *argv[])
7942 {
7943 	const struct got_error *error;
7944 	struct got_repository *repo = NULL;
7945 	struct got_worktree *worktree = NULL;
7946 	char *cwd = NULL, *repo_path = NULL;
7947 	int ch;
7948 	struct tog_view *view;
7949 	int *pack_fds = NULL;
7950 
7951 	while ((ch = getopt(argc, argv, "r:")) != -1) {
7952 		switch (ch) {
7953 		case 'r':
7954 			repo_path = realpath(optarg, NULL);
7955 			if (repo_path == NULL)
7956 				return got_error_from_errno2("realpath",
7957 				    optarg);
7958 			break;
7959 		default:
7960 			usage_ref();
7961 			/* NOTREACHED */
7962 		}
7963 	}
7964 
7965 	argc -= optind;
7966 	argv += optind;
7967 
7968 	if (argc > 1)
7969 		usage_ref();
7970 
7971 	error = got_repo_pack_fds_open(&pack_fds);
7972 	if (error != NULL)
7973 		goto done;
7974 
7975 	if (repo_path == NULL) {
7976 		cwd = getcwd(NULL, 0);
7977 		if (cwd == NULL)
7978 			return got_error_from_errno("getcwd");
7979 		error = got_worktree_open(&worktree, cwd);
7980 		if (error && error->code != GOT_ERR_NOT_WORKTREE)
7981 			goto done;
7982 		if (worktree)
7983 			repo_path =
7984 			    strdup(got_worktree_get_repo_path(worktree));
7985 		else
7986 			repo_path = strdup(cwd);
7987 		if (repo_path == NULL) {
7988 			error = got_error_from_errno("strdup");
7989 			goto done;
7990 		}
7991 	}
7992 
7993 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
7994 	if (error != NULL)
7995 		goto done;
7996 
7997 	init_curses();
7998 
7999 	error = apply_unveil(got_repo_get_path(repo), NULL);
8000 	if (error)
8001 		goto done;
8002 
8003 	error = tog_load_refs(repo, 0);
8004 	if (error)
8005 		goto done;
8006 
8007 	view = view_open(0, 0, 0, 0, TOG_VIEW_REF);
8008 	if (view == NULL) {
8009 		error = got_error_from_errno("view_open");
8010 		goto done;
8011 	}
8012 
8013 	error = open_ref_view(view, repo);
8014 	if (error)
8015 		goto done;
8016 
8017 	if (worktree) {
8018 		/* Release work tree lock. */
8019 		got_worktree_close(worktree);
8020 		worktree = NULL;
8021 	}
8022 	error = view_loop(view);
8023 done:
8024 	free(repo_path);
8025 	free(cwd);
8026 	if (repo) {
8027 		const struct got_error *close_err = got_repo_close(repo);
8028 		if (close_err)
8029 			error = close_err;
8030 	}
8031 	if (pack_fds) {
8032 		const struct got_error *pack_err =
8033 		    got_repo_pack_fds_close(pack_fds);
8034 		if (error == NULL)
8035 			error = pack_err;
8036 	}
8037 	tog_free_refs();
8038 	return error;
8039 }
8040 
8041 /*
8042  * If view was scrolled down to move the selected line into view when opening a
8043  * horizontal split, scroll back up when closing the split/toggling fullscreen.
8044  */
8045 static void
8046 offset_selection_up(struct tog_view *view)
8047 {
8048 	switch (view->type) {
8049 	case TOG_VIEW_BLAME: {
8050 		struct tog_blame_view_state *s = &view->state.blame;
8051 		if (s->first_displayed_line == 1) {
8052 			s->selected_line = MAX(s->selected_line - view->offset,
8053 			    1);
8054 			break;
8055 		}
8056 		if (s->first_displayed_line > view->offset)
8057 			s->first_displayed_line -= view->offset;
8058 		else
8059 			s->first_displayed_line = 1;
8060 		s->selected_line += view->offset;
8061 		break;
8062 	}
8063 	case TOG_VIEW_LOG:
8064 		log_scroll_up(&view->state.log, view->offset);
8065 		view->state.log.selected += view->offset;
8066 		break;
8067 	case TOG_VIEW_REF:
8068 		ref_scroll_up(&view->state.ref, view->offset);
8069 		view->state.ref.selected += view->offset;
8070 		break;
8071 	case TOG_VIEW_TREE:
8072 		tree_scroll_up(&view->state.tree, view->offset);
8073 		view->state.tree.selected += view->offset;
8074 		break;
8075 	default:
8076 		break;
8077 	}
8078 
8079 	view->offset = 0;
8080 }
8081 
8082 /*
8083  * If the selected line is in the section of screen covered by the bottom split,
8084  * scroll down offset lines to move it into view and index its new position.
8085  */
8086 static const struct got_error *
8087 offset_selection_down(struct tog_view *view)
8088 {
8089 	const struct got_error	*err = NULL;
8090 	const struct got_error	*(*scrolld)(struct tog_view *, int);
8091 	int			*selected = NULL;
8092 	int			 header, offset;
8093 
8094 	switch (view->type) {
8095 	case TOG_VIEW_BLAME: {
8096 		struct tog_blame_view_state *s = &view->state.blame;
8097 		header = 3;
8098 		scrolld = NULL;
8099 		if (s->selected_line > view->nlines - header) {
8100 			offset = abs(view->nlines - s->selected_line - header);
8101 			s->first_displayed_line += offset;
8102 			s->selected_line -= offset;
8103 			view->offset = offset;
8104 		}
8105 		break;
8106 	}
8107 	case TOG_VIEW_LOG: {
8108 		struct tog_log_view_state *s = &view->state.log;
8109 		scrolld = &log_scroll_down;
8110 		header = view_is_parent_view(view) ? 3 : 2;
8111 		selected = &s->selected;
8112 		break;
8113 	}
8114 	case TOG_VIEW_REF: {
8115 		struct tog_ref_view_state *s = &view->state.ref;
8116 		scrolld = &ref_scroll_down;
8117 		header = 3;
8118 		selected = &s->selected;
8119 		break;
8120 	}
8121 	case TOG_VIEW_TREE: {
8122 		struct tog_tree_view_state *s = &view->state.tree;
8123 		scrolld = &tree_scroll_down;
8124 		header = 5;
8125 		selected = &s->selected;
8126 		break;
8127 	}
8128 	default:
8129 		selected = NULL;
8130 		scrolld = NULL;
8131 		header = 0;
8132 		break;
8133 	}
8134 
8135 	if (selected && *selected > view->nlines - header) {
8136 		offset = abs(view->nlines - *selected - header);
8137 		view->offset = offset;
8138 		if (scrolld && offset) {
8139 			err = scrolld(view, offset);
8140 			*selected -= offset;
8141 		}
8142 	}
8143 
8144 	return err;
8145 }
8146 
8147 static void
8148 list_commands(FILE *fp)
8149 {
8150 	size_t i;
8151 
8152 	fprintf(fp, "commands:");
8153 	for (i = 0; i < nitems(tog_commands); i++) {
8154 		const struct tog_cmd *cmd = &tog_commands[i];
8155 		fprintf(fp, " %s", cmd->name);
8156 	}
8157 	fputc('\n', fp);
8158 }
8159 
8160 __dead static void
8161 usage(int hflag, int status)
8162 {
8163 	FILE *fp = (status == 0) ? stdout : stderr;
8164 
8165 	fprintf(fp, "usage: %s [-h] [-V | --version] [command] [arg ...]\n",
8166 	    getprogname());
8167 	if (hflag) {
8168 		fprintf(fp, "lazy usage: %s path\n", getprogname());
8169 		list_commands(fp);
8170 	}
8171 	exit(status);
8172 }
8173 
8174 static char **
8175 make_argv(int argc, ...)
8176 {
8177 	va_list ap;
8178 	char **argv;
8179 	int i;
8180 
8181 	va_start(ap, argc);
8182 
8183 	argv = calloc(argc, sizeof(char *));
8184 	if (argv == NULL)
8185 		err(1, "calloc");
8186 	for (i = 0; i < argc; i++) {
8187 		argv[i] = strdup(va_arg(ap, char *));
8188 		if (argv[i] == NULL)
8189 			err(1, "strdup");
8190 	}
8191 
8192 	va_end(ap);
8193 	return argv;
8194 }
8195 
8196 /*
8197  * Try to convert 'tog path' into a 'tog log path' command.
8198  * The user could simply have mistyped the command rather than knowingly
8199  * provided a path. So check whether argv[0] can in fact be resolved
8200  * to a path in the HEAD commit and print a special error if not.
8201  * This hack is for mpi@ <3
8202  */
8203 static const struct got_error *
8204 tog_log_with_path(int argc, char *argv[])
8205 {
8206 	const struct got_error *error = NULL, *close_err;
8207 	const struct tog_cmd *cmd = NULL;
8208 	struct got_repository *repo = NULL;
8209 	struct got_worktree *worktree = NULL;
8210 	struct got_object_id *commit_id = NULL, *id = NULL;
8211 	struct got_commit_object *commit = NULL;
8212 	char *cwd = NULL, *repo_path = NULL, *in_repo_path = NULL;
8213 	char *commit_id_str = NULL, **cmd_argv = NULL;
8214 	int *pack_fds = NULL;
8215 
8216 	cwd = getcwd(NULL, 0);
8217 	if (cwd == NULL)
8218 		return got_error_from_errno("getcwd");
8219 
8220 	error = got_repo_pack_fds_open(&pack_fds);
8221 	if (error != NULL)
8222 		goto done;
8223 
8224 	error = got_worktree_open(&worktree, cwd);
8225 	if (error && error->code != GOT_ERR_NOT_WORKTREE)
8226 		goto done;
8227 
8228 	if (worktree)
8229 		repo_path = strdup(got_worktree_get_repo_path(worktree));
8230 	else
8231 		repo_path = strdup(cwd);
8232 	if (repo_path == NULL) {
8233 		error = got_error_from_errno("strdup");
8234 		goto done;
8235 	}
8236 
8237 	error = got_repo_open(&repo, repo_path, NULL, pack_fds);
8238 	if (error != NULL)
8239 		goto done;
8240 
8241 	error = get_in_repo_path_from_argv0(&in_repo_path, argc, argv,
8242 	    repo, worktree);
8243 	if (error)
8244 		goto done;
8245 
8246 	error = tog_load_refs(repo, 0);
8247 	if (error)
8248 		goto done;
8249 	error = got_repo_match_object_id(&commit_id, NULL, worktree ?
8250 	    got_worktree_get_head_ref_name(worktree) : GOT_REF_HEAD,
8251 	    GOT_OBJ_TYPE_COMMIT, &tog_refs, repo);
8252 	if (error)
8253 		goto done;
8254 
8255 	if (worktree) {
8256 		got_worktree_close(worktree);
8257 		worktree = NULL;
8258 	}
8259 
8260 	error = got_object_open_as_commit(&commit, repo, commit_id);
8261 	if (error)
8262 		goto done;
8263 
8264 	error = got_object_id_by_path(&id, repo, commit, in_repo_path);
8265 	if (error) {
8266 		if (error->code != GOT_ERR_NO_TREE_ENTRY)
8267 			goto done;
8268 		fprintf(stderr, "%s: '%s' is no known command or path\n",
8269 		    getprogname(), argv[0]);
8270 		usage(1, 1);
8271 		/* not reached */
8272 	}
8273 
8274 	close_err = got_repo_close(repo);
8275 	if (error == NULL)
8276 		error = close_err;
8277 	repo = NULL;
8278 
8279 	error = got_object_id_str(&commit_id_str, commit_id);
8280 	if (error)
8281 		goto done;
8282 
8283 	cmd = &tog_commands[0]; /* log */
8284 	argc = 4;
8285 	cmd_argv = make_argv(argc, cmd->name, "-c", commit_id_str, argv[0]);
8286 	error = cmd->cmd_main(argc, cmd_argv);
8287 done:
8288 	if (repo) {
8289 		close_err = got_repo_close(repo);
8290 		if (error == NULL)
8291 			error = close_err;
8292 	}
8293 	if (commit)
8294 		got_object_commit_close(commit);
8295 	if (worktree)
8296 		got_worktree_close(worktree);
8297 	if (pack_fds) {
8298 		const struct got_error *pack_err =
8299 		    got_repo_pack_fds_close(pack_fds);
8300 		if (error == NULL)
8301 			error = pack_err;
8302 	}
8303 	free(id);
8304 	free(commit_id_str);
8305 	free(commit_id);
8306 	free(cwd);
8307 	free(repo_path);
8308 	free(in_repo_path);
8309 	if (cmd_argv) {
8310 		int i;
8311 		for (i = 0; i < argc; i++)
8312 			free(cmd_argv[i]);
8313 		free(cmd_argv);
8314 	}
8315 	tog_free_refs();
8316 	return error;
8317 }
8318 
8319 int
8320 main(int argc, char *argv[])
8321 {
8322 	const struct got_error *error = NULL;
8323 	const struct tog_cmd *cmd = NULL;
8324 	int ch, hflag = 0, Vflag = 0;
8325 	char **cmd_argv = NULL;
8326 	static const struct option longopts[] = {
8327 	    { "version", no_argument, NULL, 'V' },
8328 	    { NULL, 0, NULL, 0}
8329 	};
8330 	char *diff_algo_str = NULL;
8331 
8332 	setlocale(LC_CTYPE, "");
8333 
8334 	while ((ch = getopt_long(argc, argv, "+hV", longopts, NULL)) != -1) {
8335 		switch (ch) {
8336 		case 'h':
8337 			hflag = 1;
8338 			break;
8339 		case 'V':
8340 			Vflag = 1;
8341 			break;
8342 		default:
8343 			usage(hflag, 1);
8344 			/* NOTREACHED */
8345 		}
8346 	}
8347 
8348 	argc -= optind;
8349 	argv += optind;
8350 	optind = 1;
8351 	optreset = 1;
8352 
8353 	if (Vflag) {
8354 		got_version_print_str();
8355 		return 0;
8356 	}
8357 
8358 #ifndef PROFILE
8359 	if (pledge("stdio rpath wpath cpath flock proc tty exec sendfd unveil",
8360 	    NULL) == -1)
8361 		err(1, "pledge");
8362 #endif
8363 
8364 	if (argc == 0) {
8365 		if (hflag)
8366 			usage(hflag, 0);
8367 		/* Build an argument vector which runs a default command. */
8368 		cmd = &tog_commands[0];
8369 		argc = 1;
8370 		cmd_argv = make_argv(argc, cmd->name);
8371 	} else {
8372 		size_t i;
8373 
8374 		/* Did the user specify a command? */
8375 		for (i = 0; i < nitems(tog_commands); i++) {
8376 			if (strncmp(tog_commands[i].name, argv[0],
8377 			    strlen(argv[0])) == 0) {
8378 				cmd = &tog_commands[i];
8379 				break;
8380 			}
8381 		}
8382 	}
8383 
8384 	diff_algo_str = getenv("TOG_DIFF_ALGORITHM");
8385 	if (diff_algo_str) {
8386 		if (strcasecmp(diff_algo_str, "patience") == 0)
8387 			tog_diff_algo = GOT_DIFF_ALGORITHM_PATIENCE;
8388 		if (strcasecmp(diff_algo_str, "myers") == 0)
8389 			tog_diff_algo = GOT_DIFF_ALGORITHM_MYERS;
8390 	}
8391 
8392 	if (cmd == NULL) {
8393 		if (argc != 1)
8394 			usage(0, 1);
8395 		/* No command specified; try log with a path */
8396 		error = tog_log_with_path(argc, argv);
8397 	} else {
8398 		if (hflag)
8399 			cmd->cmd_usage();
8400 		else
8401 			error = cmd->cmd_main(argc, cmd_argv ? cmd_argv : argv);
8402 	}
8403 
8404 	endwin();
8405 	putchar('\n');
8406 	if (cmd_argv) {
8407 		int i;
8408 		for (i = 0; i < argc; i++)
8409 			free(cmd_argv[i]);
8410 		free(cmd_argv);
8411 	}
8412 
8413 	if (error && error->code != GOT_ERR_CANCELLED)
8414 		fprintf(stderr, "%s: %s\n", getprogname(), error->msg);
8415 	return 0;
8416 }